Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | SCSI Tape Driver for Linux version 1.1 and newer. See the accompanying |
| 3 | file Documentation/scsi/st.txt for more information. |
| 4 | |
| 5 | History: |
| 6 | |
| 7 | OnStream SCSI Tape support (osst) cloned from st.c by |
| 8 | Willem Riede (osst@riede.org) Feb 2000 |
| 9 | Fixes ... Kurt Garloff <garloff@suse.de> Mar 2000 |
| 10 | |
| 11 | Rewritten from Dwayne Forsyth's SCSI tape driver by Kai Makisara. |
| 12 | Contribution and ideas from several people including (in alphabetical |
| 13 | order) Klaus Ehrenfried, Wolfgang Denk, Steve Hirsch, Andreas Koppenh"ofer, |
| 14 | Michael Leodolter, Eyal Lebedinsky, J"org Weule, and Eric Youngdale. |
| 15 | |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 16 | Copyright 1992 - 2002 Kai Makisara / 2000 - 2006 Willem Riede |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | email osst@riede.org |
| 18 | |
| 19 | $Header: /cvsroot/osst/Driver/osst.c,v 1.73 2005/01/01 21:13:34 wriede Exp $ |
| 20 | |
| 21 | Microscopic alterations - Rik Ling, 2000/12/21 |
| 22 | Last st.c sync: Tue Oct 15 22:01:04 2002 by makisara |
| 23 | Some small formal changes - aeb, 950809 |
| 24 | */ |
| 25 | |
| 26 | static const char * cvsid = "$Id: osst.c,v 1.73 2005/01/01 21:13:34 wriede Exp $"; |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 27 | static const char * osst_version = "0.99.4"; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | |
| 29 | /* The "failure to reconnect" firmware bug */ |
| 30 | #define OSST_FW_NEED_POLL_MIN 10601 /*(107A)*/ |
| 31 | #define OSST_FW_NEED_POLL_MAX 10704 /*(108D)*/ |
| 32 | #define OSST_FW_NEED_POLL(x,d) ((x) >= OSST_FW_NEED_POLL_MIN && (x) <= OSST_FW_NEED_POLL_MAX && d->host->this_id != 7) |
| 33 | |
| 34 | #include <linux/module.h> |
| 35 | |
| 36 | #include <linux/fs.h> |
| 37 | #include <linux/kernel.h> |
| 38 | #include <linux/sched.h> |
| 39 | #include <linux/proc_fs.h> |
| 40 | #include <linux/mm.h> |
| 41 | #include <linux/init.h> |
| 42 | #include <linux/string.h> |
| 43 | #include <linux/errno.h> |
| 44 | #include <linux/mtio.h> |
| 45 | #include <linux/ioctl.h> |
| 46 | #include <linux/fcntl.h> |
| 47 | #include <linux/spinlock.h> |
| 48 | #include <linux/vmalloc.h> |
| 49 | #include <linux/blkdev.h> |
| 50 | #include <linux/moduleparam.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | #include <linux/delay.h> |
Marcelo Feitoza Parisi | 60c904a | 2006-03-28 01:56:47 -0800 | [diff] [blame] | 52 | #include <linux/jiffies.h> |
Jonathan Corbet | 647d87b | 2008-05-15 12:23:19 -0600 | [diff] [blame] | 53 | #include <linux/smp_lock.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | #include <asm/uaccess.h> |
| 55 | #include <asm/dma.h> |
| 56 | #include <asm/system.h> |
| 57 | |
| 58 | /* The driver prints some debugging information on the console if DEBUG |
| 59 | is defined and non-zero. */ |
| 60 | #define DEBUG 0 |
| 61 | |
| 62 | /* The message level for the debug messages is currently set to KERN_NOTICE |
| 63 | so that people can easily see the messages. Later when the debugging messages |
| 64 | in the drivers are more widely classified, this may be changed to KERN_DEBUG. */ |
| 65 | #define OSST_DEB_MSG KERN_NOTICE |
| 66 | |
| 67 | #include <scsi/scsi.h> |
| 68 | #include <scsi/scsi_dbg.h> |
| 69 | #include <scsi/scsi_device.h> |
| 70 | #include <scsi/scsi_driver.h> |
| 71 | #include <scsi/scsi_eh.h> |
| 72 | #include <scsi/scsi_host.h> |
| 73 | #include <scsi/scsi_ioctl.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | |
| 75 | #define ST_KILOBYTE 1024 |
| 76 | |
| 77 | #include "st.h" |
| 78 | #include "osst.h" |
| 79 | #include "osst_options.h" |
| 80 | #include "osst_detect.h" |
| 81 | |
| 82 | static int max_dev = 0; |
| 83 | static int write_threshold_kbs = 0; |
| 84 | static int max_sg_segs = 0; |
| 85 | |
| 86 | #ifdef MODULE |
| 87 | MODULE_AUTHOR("Willem Riede"); |
| 88 | MODULE_DESCRIPTION("OnStream {DI-|FW-|SC-|USB}{30|50} Tape Driver"); |
| 89 | MODULE_LICENSE("GPL"); |
Rene Herman | f018fa5 | 2006-03-08 00:14:20 -0800 | [diff] [blame] | 90 | MODULE_ALIAS_CHARDEV_MAJOR(OSST_MAJOR); |
Michael Tokarev | d7b8bcb0 | 2006-10-27 16:02:37 +0400 | [diff] [blame] | 91 | MODULE_ALIAS_SCSI_DEVICE(TYPE_TAPE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | |
| 93 | module_param(max_dev, int, 0444); |
| 94 | MODULE_PARM_DESC(max_dev, "Maximum number of OnStream Tape Drives to attach (4)"); |
| 95 | |
| 96 | module_param(write_threshold_kbs, int, 0644); |
| 97 | MODULE_PARM_DESC(write_threshold_kbs, "Asynchronous write threshold (KB; 32)"); |
| 98 | |
| 99 | module_param(max_sg_segs, int, 0644); |
| 100 | MODULE_PARM_DESC(max_sg_segs, "Maximum number of scatter/gather segments to use (9)"); |
| 101 | #else |
| 102 | static struct osst_dev_parm { |
| 103 | char *name; |
| 104 | int *val; |
| 105 | } parms[] __initdata = { |
| 106 | { "max_dev", &max_dev }, |
| 107 | { "write_threshold_kbs", &write_threshold_kbs }, |
| 108 | { "max_sg_segs", &max_sg_segs } |
| 109 | }; |
| 110 | #endif |
| 111 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | /* Some default definitions have been moved to osst_options.h */ |
| 113 | #define OSST_BUFFER_SIZE (OSST_BUFFER_BLOCKS * ST_KILOBYTE) |
| 114 | #define OSST_WRITE_THRESHOLD (OSST_WRITE_THRESHOLD_BLOCKS * ST_KILOBYTE) |
| 115 | |
| 116 | /* The buffer size should fit into the 24 bits for length in the |
| 117 | 6-byte SCSI read and write commands. */ |
| 118 | #if OSST_BUFFER_SIZE >= (2 << 24 - 1) |
| 119 | #error "Buffer size should not exceed (2 << 24 - 1) bytes!" |
| 120 | #endif |
| 121 | |
| 122 | #if DEBUG |
| 123 | static int debugging = 1; |
| 124 | /* uncomment define below to test error recovery */ |
| 125 | // #define OSST_INJECT_ERRORS 1 |
| 126 | #endif |
| 127 | |
| 128 | /* Do not retry! The drive firmware already retries when appropriate, |
| 129 | and when it tries to tell us something, we had better listen... */ |
| 130 | #define MAX_RETRIES 0 |
| 131 | |
| 132 | #define NO_TAPE NOT_READY |
| 133 | |
| 134 | #define OSST_WAIT_POSITION_COMPLETE (HZ > 200 ? HZ / 200 : 1) |
| 135 | #define OSST_WAIT_WRITE_COMPLETE (HZ / 12) |
| 136 | #define OSST_WAIT_LONG_WRITE_COMPLETE (HZ / 2) |
| 137 | |
| 138 | #define OSST_TIMEOUT (200 * HZ) |
| 139 | #define OSST_LONG_TIMEOUT (1800 * HZ) |
| 140 | |
| 141 | #define TAPE_NR(x) (iminor(x) & ~(-1 << ST_MODE_SHIFT)) |
| 142 | #define TAPE_MODE(x) ((iminor(x) & ST_MODE_MASK) >> ST_MODE_SHIFT) |
| 143 | #define TAPE_REWIND(x) ((iminor(x) & 0x80) == 0) |
| 144 | #define TAPE_IS_RAW(x) (TAPE_MODE(x) & (ST_NBR_MODES >> 1)) |
| 145 | |
| 146 | /* Internal ioctl to set both density (uppermost 8 bits) and blocksize (lower |
| 147 | 24 bits) */ |
| 148 | #define SET_DENS_AND_BLK 0x10001 |
| 149 | |
| 150 | static int osst_buffer_size = OSST_BUFFER_SIZE; |
| 151 | static int osst_write_threshold = OSST_WRITE_THRESHOLD; |
| 152 | static int osst_max_sg_segs = OSST_MAX_SG; |
| 153 | static int osst_max_dev = OSST_MAX_TAPES; |
| 154 | static int osst_nr_dev; |
| 155 | |
| 156 | static struct osst_tape **os_scsi_tapes = NULL; |
| 157 | static DEFINE_RWLOCK(os_scsi_tapes_lock); |
| 158 | |
| 159 | static int modes_defined = 0; |
| 160 | |
| 161 | static struct osst_buffer *new_tape_buffer(int, int, int); |
| 162 | static int enlarge_buffer(struct osst_buffer *, int); |
| 163 | static void normalize_buffer(struct osst_buffer *); |
| 164 | static int append_to_buffer(const char __user *, struct osst_buffer *, int); |
| 165 | static int from_buffer(struct osst_buffer *, char __user *, int); |
| 166 | static int osst_zero_buffer_tail(struct osst_buffer *); |
| 167 | static int osst_copy_to_buffer(struct osst_buffer *, unsigned char *); |
| 168 | static int osst_copy_from_buffer(struct osst_buffer *, unsigned char *); |
| 169 | |
| 170 | static int osst_probe(struct device *); |
| 171 | static int osst_remove(struct device *); |
| 172 | |
| 173 | static struct scsi_driver osst_template = { |
| 174 | .owner = THIS_MODULE, |
| 175 | .gendrv = { |
| 176 | .name = "osst", |
| 177 | .probe = osst_probe, |
| 178 | .remove = osst_remove, |
| 179 | } |
| 180 | }; |
| 181 | |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 182 | static int osst_int_ioctl(struct osst_tape *STp, struct osst_request ** aSRpnt, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | unsigned int cmd_in, unsigned long arg); |
| 184 | |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 185 | static int osst_set_frame_position(struct osst_tape *STp, struct osst_request ** aSRpnt, int frame, int skip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 187 | static int osst_get_frame_position(struct osst_tape *STp, struct osst_request ** aSRpnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 189 | static int osst_flush_write_buffer(struct osst_tape *STp, struct osst_request ** aSRpnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 191 | static int osst_write_error_recovery(struct osst_tape * STp, struct osst_request ** aSRpnt, int pending); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | |
| 193 | static inline char *tape_name(struct osst_tape *tape) |
| 194 | { |
| 195 | return tape->drive->disk_name; |
| 196 | } |
| 197 | |
| 198 | /* Routines that handle the interaction with mid-layer SCSI routines */ |
| 199 | |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 200 | |
| 201 | /* Normalize Sense */ |
| 202 | static void osst_analyze_sense(struct osst_request *SRpnt, struct st_cmdstatus *s) |
| 203 | { |
| 204 | const u8 *ucp; |
| 205 | const u8 *sense = SRpnt->sense; |
| 206 | |
| 207 | s->have_sense = scsi_normalize_sense(SRpnt->sense, |
| 208 | SCSI_SENSE_BUFFERSIZE, &s->sense_hdr); |
| 209 | s->flags = 0; |
| 210 | |
| 211 | if (s->have_sense) { |
| 212 | s->deferred = 0; |
| 213 | s->remainder_valid = |
| 214 | scsi_get_sense_info_fld(sense, SCSI_SENSE_BUFFERSIZE, &s->uremainder64); |
| 215 | switch (sense[0] & 0x7f) { |
| 216 | case 0x71: |
| 217 | s->deferred = 1; |
| 218 | case 0x70: |
| 219 | s->fixed_format = 1; |
| 220 | s->flags = sense[2] & 0xe0; |
| 221 | break; |
| 222 | case 0x73: |
| 223 | s->deferred = 1; |
| 224 | case 0x72: |
| 225 | s->fixed_format = 0; |
| 226 | ucp = scsi_sense_desc_find(sense, SCSI_SENSE_BUFFERSIZE, 4); |
| 227 | s->flags = ucp ? (ucp[3] & 0xe0) : 0; |
| 228 | break; |
| 229 | } |
| 230 | } |
| 231 | } |
| 232 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | /* Convert the result to success code */ |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 234 | static int osst_chk_result(struct osst_tape * STp, struct osst_request * SRpnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | { |
| 236 | char *name = tape_name(STp); |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 237 | int result = SRpnt->result; |
| 238 | u8 * sense = SRpnt->sense, scode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | #if DEBUG |
| 240 | const char *stp; |
| 241 | #endif |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 242 | struct st_cmdstatus *cmdstatp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 244 | if (!result) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | return 0; |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 246 | |
| 247 | cmdstatp = &STp->buffer->cmdstat; |
| 248 | osst_analyze_sense(SRpnt, cmdstatp); |
| 249 | |
| 250 | if (cmdstatp->have_sense) |
| 251 | scode = STp->buffer->cmdstat.sense_hdr.sense_key; |
| 252 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | scode = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | #if DEBUG |
| 255 | if (debugging) { |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 256 | printk(OSST_DEB_MSG "%s:D: Error: %x, cmd: %x %x %x %x %x %x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | name, result, |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 258 | SRpnt->cmd[0], SRpnt->cmd[1], SRpnt->cmd[2], |
| 259 | SRpnt->cmd[3], SRpnt->cmd[4], SRpnt->cmd[5]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | if (scode) printk(OSST_DEB_MSG "%s:D: Sense: %02x, ASC: %02x, ASCQ: %02x\n", |
| 261 | name, scode, sense[12], sense[13]); |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 262 | if (cmdstatp->have_sense) |
| 263 | __scsi_print_sense("osst ", SRpnt->sense, SCSI_SENSE_BUFFERSIZE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | } |
| 265 | else |
| 266 | #endif |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 267 | if (cmdstatp->have_sense && ( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | scode != NO_SENSE && |
| 269 | scode != RECOVERED_ERROR && |
| 270 | /* scode != UNIT_ATTENTION && */ |
| 271 | scode != BLANK_CHECK && |
| 272 | scode != VOLUME_OVERFLOW && |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 273 | SRpnt->cmd[0] != MODE_SENSE && |
| 274 | SRpnt->cmd[0] != TEST_UNIT_READY)) { /* Abnormal conditions for tape */ |
| 275 | if (cmdstatp->have_sense) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | printk(KERN_WARNING "%s:W: Command with sense data:\n", name); |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 277 | __scsi_print_sense("osst ", SRpnt->sense, SCSI_SENSE_BUFFERSIZE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | } |
| 279 | else { |
| 280 | static int notyetprinted = 1; |
| 281 | |
| 282 | printk(KERN_WARNING |
| 283 | "%s:W: Warning %x (sugg. bt 0x%x, driver bt 0x%x, host bt 0x%x).\n", |
| 284 | name, result, suggestion(result), driver_byte(result) & DRIVER_MASK, |
| 285 | host_byte(result)); |
| 286 | if (notyetprinted) { |
| 287 | notyetprinted = 0; |
| 288 | printk(KERN_INFO |
| 289 | "%s:I: This warning may be caused by your scsi controller,\n", name); |
| 290 | printk(KERN_INFO |
| 291 | "%s:I: it has been reported with some Buslogic cards.\n", name); |
| 292 | } |
| 293 | } |
| 294 | } |
| 295 | STp->pos_unknown |= STp->device->was_reset; |
| 296 | |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 297 | if (cmdstatp->have_sense && scode == RECOVERED_ERROR) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | STp->recover_count++; |
| 299 | STp->recover_erreg++; |
| 300 | #if DEBUG |
| 301 | if (debugging) { |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 302 | if (SRpnt->cmd[0] == READ_6) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | stp = "read"; |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 304 | else if (SRpnt->cmd[0] == WRITE_6) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | stp = "write"; |
| 306 | else |
| 307 | stp = "ioctl"; |
| 308 | printk(OSST_DEB_MSG "%s:D: Recovered %s error (%d).\n", name, stp, |
| 309 | STp->recover_count); |
| 310 | } |
| 311 | #endif |
| 312 | if ((sense[2] & 0xe0) == 0) |
| 313 | return 0; |
| 314 | } |
| 315 | return (-EIO); |
| 316 | } |
| 317 | |
| 318 | |
| 319 | /* Wakeup from interrupt */ |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 320 | static void osst_sleep_done(void *data, char *sense, int result, int resid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | { |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 322 | struct osst_request *SRpnt = data; |
| 323 | struct osst_tape *STp = SRpnt->stp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 325 | memcpy(SRpnt->sense, sense, SCSI_SENSE_BUFFERSIZE); |
| 326 | STp->buffer->cmdstat.midlevel_result = SRpnt->result = result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | #if DEBUG |
| 328 | STp->write_pending = 0; |
| 329 | #endif |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 330 | if (SRpnt->waiting) |
| 331 | complete(SRpnt->waiting); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | } |
| 333 | |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 334 | /* osst_request memory management */ |
| 335 | static struct osst_request *osst_allocate_request(void) |
| 336 | { |
| 337 | return kzalloc(sizeof(struct osst_request), GFP_KERNEL); |
| 338 | } |
| 339 | |
| 340 | static void osst_release_request(struct osst_request *streq) |
| 341 | { |
| 342 | kfree(streq); |
| 343 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | |
| 345 | /* Do the scsi command. Waits until command performed if do_wait is true. |
| 346 | Otherwise osst_write_behind_check() is used to check that the command |
| 347 | has finished. */ |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 348 | static struct osst_request * osst_do_scsi(struct osst_request *SRpnt, struct osst_tape *STp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | unsigned char *cmd, int bytes, int direction, int timeout, int retries, int do_wait) |
| 350 | { |
| 351 | unsigned char *bp; |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 352 | unsigned short use_sg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | #ifdef OSST_INJECT_ERRORS |
| 354 | static int inject = 0; |
| 355 | static int repeat = 0; |
| 356 | #endif |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 357 | struct completion *waiting; |
| 358 | |
| 359 | /* if async, make sure there's no command outstanding */ |
| 360 | if (!do_wait && ((STp->buffer)->last_SRpnt)) { |
| 361 | printk(KERN_ERR "%s: Async command already active.\n", |
| 362 | tape_name(STp)); |
| 363 | if (signal_pending(current)) |
| 364 | (STp->buffer)->syscall_result = (-EINTR); |
| 365 | else |
| 366 | (STp->buffer)->syscall_result = (-EBUSY); |
| 367 | return NULL; |
| 368 | } |
| 369 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | if (SRpnt == NULL) { |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 371 | SRpnt = osst_allocate_request(); |
| 372 | if (SRpnt == NULL) { |
| 373 | printk(KERN_ERR "%s: Can't allocate SCSI request.\n", |
| 374 | tape_name(STp)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | if (signal_pending(current)) |
| 376 | (STp->buffer)->syscall_result = (-EINTR); |
| 377 | else |
| 378 | (STp->buffer)->syscall_result = (-EBUSY); |
| 379 | return NULL; |
| 380 | } |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 381 | SRpnt->stp = STp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | } |
| 383 | |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 384 | /* If async IO, set last_SRpnt. This ptr tells write_behind_check |
| 385 | which IO is outstanding. It's nulled out when the IO completes. */ |
| 386 | if (!do_wait) |
| 387 | (STp->buffer)->last_SRpnt = SRpnt; |
| 388 | |
| 389 | waiting = &STp->wait; |
| 390 | init_completion(waiting); |
| 391 | SRpnt->waiting = waiting; |
| 392 | |
| 393 | use_sg = (bytes > STp->buffer->sg[0].length) ? STp->buffer->use_sg : 0; |
| 394 | if (use_sg) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | bp = (char *)&(STp->buffer->sg[0]); |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 396 | if (STp->buffer->sg_segs < use_sg) |
| 397 | use_sg = STp->buffer->sg_segs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | } |
| 399 | else |
| 400 | bp = (STp->buffer)->b_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 402 | memcpy(SRpnt->cmd, cmd, sizeof(SRpnt->cmd)); |
| 403 | STp->buffer->cmdstat.have_sense = 0; |
| 404 | STp->buffer->syscall_result = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 406 | if (scsi_execute_async(STp->device, cmd, COMMAND_SIZE(cmd[0]), direction, bp, bytes, |
| 407 | use_sg, timeout, retries, SRpnt, osst_sleep_done, GFP_KERNEL)) |
| 408 | /* could not allocate the buffer or request was too large */ |
| 409 | (STp->buffer)->syscall_result = (-EBUSY); |
| 410 | else if (do_wait) { |
| 411 | wait_for_completion(waiting); |
| 412 | SRpnt->waiting = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | STp->buffer->syscall_result = osst_chk_result(STp, SRpnt); |
| 414 | #ifdef OSST_INJECT_ERRORS |
| 415 | if (STp->buffer->syscall_result == 0 && |
| 416 | cmd[0] == READ_6 && |
| 417 | cmd[4] && |
| 418 | ( (++ inject % 83) == 29 || |
| 419 | (STp->first_frame_position == 240 |
| 420 | /* or STp->read_error_frame to fail again on the block calculated above */ && |
| 421 | ++repeat < 3))) { |
| 422 | printk(OSST_DEB_MSG "%s:D: Injecting read error\n", tape_name(STp)); |
| 423 | STp->buffer->last_result_fatal = 1; |
| 424 | } |
| 425 | #endif |
| 426 | } |
| 427 | return SRpnt; |
| 428 | } |
| 429 | |
| 430 | |
| 431 | /* Handle the write-behind checking (downs the semaphore) */ |
| 432 | static void osst_write_behind_check(struct osst_tape *STp) |
| 433 | { |
| 434 | struct osst_buffer * STbuffer; |
| 435 | |
| 436 | STbuffer = STp->buffer; |
| 437 | |
| 438 | #if DEBUG |
| 439 | if (STp->write_pending) |
| 440 | STp->nbr_waits++; |
| 441 | else |
| 442 | STp->nbr_finished++; |
| 443 | #endif |
| 444 | wait_for_completion(&(STp->wait)); |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 445 | STp->buffer->last_SRpnt->waiting = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | |
| 447 | STp->buffer->syscall_result = osst_chk_result(STp, STp->buffer->last_SRpnt); |
| 448 | |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 449 | if (STp->buffer->syscall_result) |
| 450 | STp->buffer->syscall_result = |
| 451 | osst_write_error_recovery(STp, &(STp->buffer->last_SRpnt), 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | else |
| 453 | STp->first_frame_position++; |
| 454 | |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 455 | osst_release_request(STp->buffer->last_SRpnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | |
| 457 | if (STbuffer->writing < STbuffer->buffer_bytes) |
| 458 | printk(KERN_WARNING "osst :A: write_behind_check: something left in buffer!\n"); |
| 459 | |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 460 | STbuffer->last_SRpnt = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | STbuffer->buffer_bytes -= STbuffer->writing; |
| 462 | STbuffer->writing = 0; |
| 463 | |
| 464 | return; |
| 465 | } |
| 466 | |
| 467 | |
| 468 | |
| 469 | /* Onstream specific Routines */ |
| 470 | /* |
| 471 | * Initialize the OnStream AUX |
| 472 | */ |
| 473 | static void osst_init_aux(struct osst_tape * STp, int frame_type, int frame_seq_number, |
| 474 | int logical_blk_num, int blk_sz, int blk_cnt) |
| 475 | { |
| 476 | os_aux_t *aux = STp->buffer->aux; |
| 477 | os_partition_t *par = &aux->partition; |
| 478 | os_dat_t *dat = &aux->dat; |
| 479 | |
| 480 | if (STp->raw) return; |
| 481 | |
| 482 | memset(aux, 0, sizeof(*aux)); |
| 483 | aux->format_id = htonl(0); |
| 484 | memcpy(aux->application_sig, "LIN4", 4); |
| 485 | aux->hdwr = htonl(0); |
| 486 | aux->frame_type = frame_type; |
| 487 | |
| 488 | switch (frame_type) { |
| 489 | case OS_FRAME_TYPE_HEADER: |
| 490 | aux->update_frame_cntr = htonl(STp->update_frame_cntr); |
| 491 | par->partition_num = OS_CONFIG_PARTITION; |
| 492 | par->par_desc_ver = OS_PARTITION_VERSION; |
| 493 | par->wrt_pass_cntr = htons(0xffff); |
| 494 | /* 0-4 = reserved, 5-9 = header, 2990-2994 = header, 2995-2999 = reserved */ |
| 495 | par->first_frame_ppos = htonl(0); |
| 496 | par->last_frame_ppos = htonl(0xbb7); |
| 497 | aux->frame_seq_num = htonl(0); |
| 498 | aux->logical_blk_num_high = htonl(0); |
| 499 | aux->logical_blk_num = htonl(0); |
| 500 | aux->next_mark_ppos = htonl(STp->first_mark_ppos); |
| 501 | break; |
| 502 | case OS_FRAME_TYPE_DATA: |
| 503 | case OS_FRAME_TYPE_MARKER: |
| 504 | dat->dat_sz = 8; |
| 505 | dat->reserved1 = 0; |
| 506 | dat->entry_cnt = 1; |
| 507 | dat->reserved3 = 0; |
| 508 | dat->dat_list[0].blk_sz = htonl(blk_sz); |
| 509 | dat->dat_list[0].blk_cnt = htons(blk_cnt); |
| 510 | dat->dat_list[0].flags = frame_type==OS_FRAME_TYPE_MARKER? |
| 511 | OS_DAT_FLAGS_MARK:OS_DAT_FLAGS_DATA; |
| 512 | dat->dat_list[0].reserved = 0; |
| 513 | case OS_FRAME_TYPE_EOD: |
| 514 | aux->update_frame_cntr = htonl(0); |
| 515 | par->partition_num = OS_DATA_PARTITION; |
| 516 | par->par_desc_ver = OS_PARTITION_VERSION; |
| 517 | par->wrt_pass_cntr = htons(STp->wrt_pass_cntr); |
| 518 | par->first_frame_ppos = htonl(STp->first_data_ppos); |
| 519 | par->last_frame_ppos = htonl(STp->capacity); |
| 520 | aux->frame_seq_num = htonl(frame_seq_number); |
| 521 | aux->logical_blk_num_high = htonl(0); |
| 522 | aux->logical_blk_num = htonl(logical_blk_num); |
| 523 | break; |
| 524 | default: ; /* probably FILL */ |
| 525 | } |
Al Viro | 95389b8 | 2007-02-09 16:39:45 +0000 | [diff] [blame] | 526 | aux->filemark_cnt = htonl(STp->filemark_cnt); |
| 527 | aux->phys_fm = htonl(0xffffffff); |
| 528 | aux->last_mark_ppos = htonl(STp->last_mark_ppos); |
| 529 | aux->last_mark_lbn = htonl(STp->last_mark_lbn); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | } |
| 531 | |
| 532 | /* |
| 533 | * Verify that we have the correct tape frame |
| 534 | */ |
| 535 | static int osst_verify_frame(struct osst_tape * STp, int frame_seq_number, int quiet) |
| 536 | { |
| 537 | char * name = tape_name(STp); |
| 538 | os_aux_t * aux = STp->buffer->aux; |
| 539 | os_partition_t * par = &(aux->partition); |
| 540 | struct st_partstat * STps = &(STp->ps[STp->partition]); |
| 541 | int blk_cnt, blk_sz, i; |
| 542 | |
| 543 | if (STp->raw) { |
| 544 | if (STp->buffer->syscall_result) { |
| 545 | for (i=0; i < STp->buffer->sg_segs; i++) |
Jens Axboe | 45711f1 | 2007-10-22 21:19:53 +0200 | [diff] [blame] | 546 | memset(page_address(sg_page(&STp->buffer->sg[i])), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | 0, STp->buffer->sg[i].length); |
| 548 | strcpy(STp->buffer->b_data, "READ ERROR ON FRAME"); |
| 549 | } else |
| 550 | STp->buffer->buffer_bytes = OS_FRAME_SIZE; |
| 551 | return 1; |
| 552 | } |
| 553 | if (STp->buffer->syscall_result) { |
| 554 | #if DEBUG |
| 555 | printk(OSST_DEB_MSG "%s:D: Skipping frame, read error\n", name); |
| 556 | #endif |
| 557 | return 0; |
| 558 | } |
| 559 | if (ntohl(aux->format_id) != 0) { |
| 560 | #if DEBUG |
| 561 | printk(OSST_DEB_MSG "%s:D: Skipping frame, format_id %u\n", name, ntohl(aux->format_id)); |
| 562 | #endif |
| 563 | goto err_out; |
| 564 | } |
| 565 | if (memcmp(aux->application_sig, STp->application_sig, 4) != 0 && |
| 566 | (memcmp(aux->application_sig, "LIN3", 4) != 0 || STp->linux_media_version != 4)) { |
| 567 | #if DEBUG |
| 568 | printk(OSST_DEB_MSG "%s:D: Skipping frame, incorrect application signature\n", name); |
| 569 | #endif |
| 570 | goto err_out; |
| 571 | } |
| 572 | if (par->partition_num != OS_DATA_PARTITION) { |
| 573 | if (!STp->linux_media || STp->linux_media_version != 2) { |
| 574 | #if DEBUG |
| 575 | printk(OSST_DEB_MSG "%s:D: Skipping frame, partition num %d\n", |
| 576 | name, par->partition_num); |
| 577 | #endif |
| 578 | goto err_out; |
| 579 | } |
| 580 | } |
| 581 | if (par->par_desc_ver != OS_PARTITION_VERSION) { |
| 582 | #if DEBUG |
| 583 | printk(OSST_DEB_MSG "%s:D: Skipping frame, partition version %d\n", name, par->par_desc_ver); |
| 584 | #endif |
| 585 | goto err_out; |
| 586 | } |
| 587 | if (ntohs(par->wrt_pass_cntr) != STp->wrt_pass_cntr) { |
| 588 | #if DEBUG |
| 589 | printk(OSST_DEB_MSG "%s:D: Skipping frame, wrt_pass_cntr %d (expected %d)\n", |
| 590 | name, ntohs(par->wrt_pass_cntr), STp->wrt_pass_cntr); |
| 591 | #endif |
| 592 | goto err_out; |
| 593 | } |
| 594 | if (aux->frame_type != OS_FRAME_TYPE_DATA && |
| 595 | aux->frame_type != OS_FRAME_TYPE_EOD && |
| 596 | aux->frame_type != OS_FRAME_TYPE_MARKER) { |
Ilpo Järvinen | ccd1443 | 2007-10-23 13:42:04 -0700 | [diff] [blame] | 597 | if (!quiet) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | #if DEBUG |
| 599 | printk(OSST_DEB_MSG "%s:D: Skipping frame, frame type %x\n", name, aux->frame_type); |
| 600 | #endif |
Ilpo Järvinen | ccd1443 | 2007-10-23 13:42:04 -0700 | [diff] [blame] | 601 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 602 | goto err_out; |
| 603 | } |
| 604 | if (aux->frame_type == OS_FRAME_TYPE_EOD && |
| 605 | STp->first_frame_position < STp->eod_frame_ppos) { |
| 606 | printk(KERN_INFO "%s:I: Skipping premature EOD frame %d\n", name, |
| 607 | STp->first_frame_position); |
| 608 | goto err_out; |
| 609 | } |
| 610 | if (frame_seq_number != -1 && ntohl(aux->frame_seq_num) != frame_seq_number) { |
Ilpo Järvinen | ccd1443 | 2007-10-23 13:42:04 -0700 | [diff] [blame] | 611 | if (!quiet) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 612 | #if DEBUG |
| 613 | printk(OSST_DEB_MSG "%s:D: Skipping frame, sequence number %u (expected %d)\n", |
| 614 | name, ntohl(aux->frame_seq_num), frame_seq_number); |
| 615 | #endif |
Ilpo Järvinen | ccd1443 | 2007-10-23 13:42:04 -0700 | [diff] [blame] | 616 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | goto err_out; |
| 618 | } |
| 619 | if (aux->frame_type == OS_FRAME_TYPE_MARKER) { |
| 620 | STps->eof = ST_FM_HIT; |
| 621 | |
| 622 | i = ntohl(aux->filemark_cnt); |
| 623 | if (STp->header_cache != NULL && i < OS_FM_TAB_MAX && (i > STp->filemark_cnt || |
| 624 | STp->first_frame_position - 1 != ntohl(STp->header_cache->dat_fm_tab.fm_tab_ent[i]))) { |
| 625 | #if DEBUG |
| 626 | printk(OSST_DEB_MSG "%s:D: %s filemark %d at frame pos %d\n", name, |
| 627 | STp->header_cache->dat_fm_tab.fm_tab_ent[i] == 0?"Learned":"Corrected", |
| 628 | i, STp->first_frame_position - 1); |
| 629 | #endif |
| 630 | STp->header_cache->dat_fm_tab.fm_tab_ent[i] = htonl(STp->first_frame_position - 1); |
| 631 | if (i >= STp->filemark_cnt) |
| 632 | STp->filemark_cnt = i+1; |
| 633 | } |
| 634 | } |
| 635 | if (aux->frame_type == OS_FRAME_TYPE_EOD) { |
| 636 | STps->eof = ST_EOD_1; |
| 637 | STp->frame_in_buffer = 1; |
| 638 | } |
| 639 | if (aux->frame_type == OS_FRAME_TYPE_DATA) { |
| 640 | blk_cnt = ntohs(aux->dat.dat_list[0].blk_cnt); |
| 641 | blk_sz = ntohl(aux->dat.dat_list[0].blk_sz); |
| 642 | STp->buffer->buffer_bytes = blk_cnt * blk_sz; |
| 643 | STp->buffer->read_pointer = 0; |
| 644 | STp->frame_in_buffer = 1; |
| 645 | |
| 646 | /* See what block size was used to write file */ |
| 647 | if (STp->block_size != blk_sz && blk_sz > 0) { |
| 648 | printk(KERN_INFO |
| 649 | "%s:I: File was written with block size %d%c, currently %d%c, adjusted to match.\n", |
| 650 | name, blk_sz<1024?blk_sz:blk_sz/1024,blk_sz<1024?'b':'k', |
| 651 | STp->block_size<1024?STp->block_size:STp->block_size/1024, |
| 652 | STp->block_size<1024?'b':'k'); |
| 653 | STp->block_size = blk_sz; |
| 654 | STp->buffer->buffer_blocks = OS_DATA_SIZE / blk_sz; |
| 655 | } |
| 656 | STps->eof = ST_NOEOF; |
| 657 | } |
| 658 | STp->frame_seq_number = ntohl(aux->frame_seq_num); |
| 659 | STp->logical_blk_num = ntohl(aux->logical_blk_num); |
| 660 | return 1; |
| 661 | |
| 662 | err_out: |
| 663 | if (STp->read_error_frame == 0) |
| 664 | STp->read_error_frame = STp->first_frame_position - 1; |
| 665 | return 0; |
| 666 | } |
| 667 | |
| 668 | /* |
| 669 | * Wait for the unit to become Ready |
| 670 | */ |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 671 | static int osst_wait_ready(struct osst_tape * STp, struct osst_request ** aSRpnt, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | unsigned timeout, int initial_delay) |
| 673 | { |
| 674 | unsigned char cmd[MAX_COMMAND_SIZE]; |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 675 | struct osst_request * SRpnt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 676 | unsigned long startwait = jiffies; |
| 677 | #if DEBUG |
| 678 | int dbg = debugging; |
| 679 | char * name = tape_name(STp); |
| 680 | |
| 681 | printk(OSST_DEB_MSG "%s:D: Reached onstream wait ready\n", name); |
| 682 | #endif |
| 683 | |
| 684 | if (initial_delay > 0) |
| 685 | msleep(jiffies_to_msecs(initial_delay)); |
| 686 | |
| 687 | memset(cmd, 0, MAX_COMMAND_SIZE); |
| 688 | cmd[0] = TEST_UNIT_READY; |
| 689 | |
| 690 | SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, 0, DMA_NONE, STp->timeout, MAX_RETRIES, 1); |
| 691 | *aSRpnt = SRpnt; |
| 692 | if (!SRpnt) return (-EBUSY); |
| 693 | |
| 694 | while ( STp->buffer->syscall_result && time_before(jiffies, startwait + timeout*HZ) && |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 695 | (( SRpnt->sense[2] == 2 && SRpnt->sense[12] == 4 && |
| 696 | (SRpnt->sense[13] == 1 || SRpnt->sense[13] == 8) ) || |
| 697 | ( SRpnt->sense[2] == 6 && SRpnt->sense[12] == 0x28 && |
| 698 | SRpnt->sense[13] == 0 ) )) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 699 | #if DEBUG |
| 700 | if (debugging) { |
| 701 | printk(OSST_DEB_MSG "%s:D: Sleeping in onstream wait ready\n", name); |
| 702 | printk(OSST_DEB_MSG "%s:D: Turning off debugging for a while\n", name); |
| 703 | debugging = 0; |
| 704 | } |
| 705 | #endif |
| 706 | msleep(100); |
| 707 | |
| 708 | memset(cmd, 0, MAX_COMMAND_SIZE); |
| 709 | cmd[0] = TEST_UNIT_READY; |
| 710 | |
| 711 | SRpnt = osst_do_scsi(SRpnt, STp, cmd, 0, DMA_NONE, STp->timeout, MAX_RETRIES, 1); |
| 712 | } |
| 713 | *aSRpnt = SRpnt; |
| 714 | #if DEBUG |
| 715 | debugging = dbg; |
| 716 | #endif |
| 717 | if ( STp->buffer->syscall_result && |
| 718 | osst_write_error_recovery(STp, aSRpnt, 0) ) { |
| 719 | #if DEBUG |
| 720 | printk(OSST_DEB_MSG "%s:D: Abnormal exit from onstream wait ready\n", name); |
| 721 | printk(OSST_DEB_MSG "%s:D: Result = %d, Sense: 0=%02x, 2=%02x, 12=%02x, 13=%02x\n", name, |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 722 | STp->buffer->syscall_result, SRpnt->sense[0], SRpnt->sense[2], |
| 723 | SRpnt->sense[12], SRpnt->sense[13]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | #endif |
| 725 | return (-EIO); |
| 726 | } |
| 727 | #if DEBUG |
| 728 | printk(OSST_DEB_MSG "%s:D: Normal exit from onstream wait ready\n", name); |
| 729 | #endif |
| 730 | return 0; |
| 731 | } |
| 732 | |
| 733 | /* |
| 734 | * Wait for a tape to be inserted in the unit |
| 735 | */ |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 736 | static int osst_wait_for_medium(struct osst_tape * STp, struct osst_request ** aSRpnt, unsigned timeout) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 737 | { |
| 738 | unsigned char cmd[MAX_COMMAND_SIZE]; |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 739 | struct osst_request * SRpnt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | unsigned long startwait = jiffies; |
| 741 | #if DEBUG |
| 742 | int dbg = debugging; |
| 743 | char * name = tape_name(STp); |
| 744 | |
| 745 | printk(OSST_DEB_MSG "%s:D: Reached onstream wait for medium\n", name); |
| 746 | #endif |
| 747 | |
| 748 | memset(cmd, 0, MAX_COMMAND_SIZE); |
| 749 | cmd[0] = TEST_UNIT_READY; |
| 750 | |
| 751 | SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, 0, DMA_NONE, STp->timeout, MAX_RETRIES, 1); |
| 752 | *aSRpnt = SRpnt; |
| 753 | if (!SRpnt) return (-EBUSY); |
| 754 | |
| 755 | while ( STp->buffer->syscall_result && time_before(jiffies, startwait + timeout*HZ) && |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 756 | SRpnt->sense[2] == 2 && SRpnt->sense[12] == 0x3a && SRpnt->sense[13] == 0 ) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 757 | #if DEBUG |
| 758 | if (debugging) { |
| 759 | printk(OSST_DEB_MSG "%s:D: Sleeping in onstream wait medium\n", name); |
| 760 | printk(OSST_DEB_MSG "%s:D: Turning off debugging for a while\n", name); |
| 761 | debugging = 0; |
| 762 | } |
| 763 | #endif |
| 764 | msleep(100); |
| 765 | |
| 766 | memset(cmd, 0, MAX_COMMAND_SIZE); |
| 767 | cmd[0] = TEST_UNIT_READY; |
| 768 | |
| 769 | SRpnt = osst_do_scsi(SRpnt, STp, cmd, 0, DMA_NONE, STp->timeout, MAX_RETRIES, 1); |
| 770 | } |
| 771 | *aSRpnt = SRpnt; |
| 772 | #if DEBUG |
| 773 | debugging = dbg; |
| 774 | #endif |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 775 | if ( STp->buffer->syscall_result && SRpnt->sense[2] != 2 && |
| 776 | SRpnt->sense[12] != 4 && SRpnt->sense[13] == 1) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 777 | #if DEBUG |
| 778 | printk(OSST_DEB_MSG "%s:D: Abnormal exit from onstream wait medium\n", name); |
| 779 | printk(OSST_DEB_MSG "%s:D: Result = %d, Sense: 0=%02x, 2=%02x, 12=%02x, 13=%02x\n", name, |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 780 | STp->buffer->syscall_result, SRpnt->sense[0], SRpnt->sense[2], |
| 781 | SRpnt->sense[12], SRpnt->sense[13]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | #endif |
| 783 | return 0; |
| 784 | } |
| 785 | #if DEBUG |
| 786 | printk(OSST_DEB_MSG "%s:D: Normal exit from onstream wait medium\n", name); |
| 787 | #endif |
| 788 | return 1; |
| 789 | } |
| 790 | |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 791 | static int osst_position_tape_and_confirm(struct osst_tape * STp, struct osst_request ** aSRpnt, int frame) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 792 | { |
| 793 | int retval; |
| 794 | |
| 795 | osst_wait_ready(STp, aSRpnt, 15 * 60, 0); /* TODO - can this catch a write error? */ |
| 796 | retval = osst_set_frame_position(STp, aSRpnt, frame, 0); |
| 797 | if (retval) return (retval); |
| 798 | osst_wait_ready(STp, aSRpnt, 15 * 60, OSST_WAIT_POSITION_COMPLETE); |
| 799 | return (osst_get_frame_position(STp, aSRpnt)); |
| 800 | } |
| 801 | |
| 802 | /* |
| 803 | * Wait for write(s) to complete |
| 804 | */ |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 805 | static int osst_flush_drive_buffer(struct osst_tape * STp, struct osst_request ** aSRpnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 806 | { |
| 807 | unsigned char cmd[MAX_COMMAND_SIZE]; |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 808 | struct osst_request * SRpnt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 809 | int result = 0; |
| 810 | int delay = OSST_WAIT_WRITE_COMPLETE; |
| 811 | #if DEBUG |
| 812 | char * name = tape_name(STp); |
| 813 | |
| 814 | printk(OSST_DEB_MSG "%s:D: Reached onstream flush drive buffer (write filemark)\n", name); |
| 815 | #endif |
| 816 | |
| 817 | memset(cmd, 0, MAX_COMMAND_SIZE); |
| 818 | cmd[0] = WRITE_FILEMARKS; |
| 819 | cmd[1] = 1; |
| 820 | |
| 821 | SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, 0, DMA_NONE, STp->timeout, MAX_RETRIES, 1); |
| 822 | *aSRpnt = SRpnt; |
| 823 | if (!SRpnt) return (-EBUSY); |
| 824 | if (STp->buffer->syscall_result) { |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 825 | if ((SRpnt->sense[2] & 0x0f) == 2 && SRpnt->sense[12] == 4) { |
| 826 | if (SRpnt->sense[13] == 8) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 827 | delay = OSST_WAIT_LONG_WRITE_COMPLETE; |
| 828 | } |
| 829 | } else |
| 830 | result = osst_write_error_recovery(STp, aSRpnt, 0); |
| 831 | } |
| 832 | result |= osst_wait_ready(STp, aSRpnt, 5 * 60, delay); |
| 833 | STp->ps[STp->partition].rw = OS_WRITING_COMPLETE; |
| 834 | |
| 835 | return (result); |
| 836 | } |
| 837 | |
| 838 | #define OSST_POLL_PER_SEC 10 |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 839 | static int osst_wait_frame(struct osst_tape * STp, struct osst_request ** aSRpnt, int curr, int minlast, int to) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 840 | { |
| 841 | unsigned long startwait = jiffies; |
| 842 | char * name = tape_name(STp); |
| 843 | #if DEBUG |
| 844 | char notyetprinted = 1; |
| 845 | #endif |
| 846 | if (minlast >= 0 && STp->ps[STp->partition].rw != ST_READING) |
| 847 | printk(KERN_ERR "%s:A: Waiting for frame without having initialized read!\n", name); |
| 848 | |
| 849 | while (time_before (jiffies, startwait + to*HZ)) |
| 850 | { |
| 851 | int result; |
| 852 | result = osst_get_frame_position(STp, aSRpnt); |
| 853 | if (result == -EIO) |
| 854 | if ((result = osst_write_error_recovery(STp, aSRpnt, 0)) == 0) |
| 855 | return 0; /* successful recovery leaves drive ready for frame */ |
| 856 | if (result < 0) break; |
| 857 | if (STp->first_frame_position == curr && |
| 858 | ((minlast < 0 && |
| 859 | (signed)STp->last_frame_position > (signed)curr + minlast) || |
| 860 | (minlast >= 0 && STp->cur_frames > minlast) |
| 861 | ) && result >= 0) |
| 862 | { |
| 863 | #if DEBUG |
Marcelo Feitoza Parisi | 60c904a | 2006-03-28 01:56:47 -0800 | [diff] [blame] | 864 | if (debugging || time_after_eq(jiffies, startwait + 2*HZ/OSST_POLL_PER_SEC)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 865 | printk (OSST_DEB_MSG |
| 866 | "%s:D: Succ wait f fr %i (>%i): %i-%i %i (%i): %3li.%li s\n", |
| 867 | name, curr, curr+minlast, STp->first_frame_position, |
| 868 | STp->last_frame_position, STp->cur_frames, |
| 869 | result, (jiffies-startwait)/HZ, |
| 870 | (((jiffies-startwait)%HZ)*10)/HZ); |
| 871 | #endif |
| 872 | return 0; |
| 873 | } |
| 874 | #if DEBUG |
Marcelo Feitoza Parisi | 60c904a | 2006-03-28 01:56:47 -0800 | [diff] [blame] | 875 | if (time_after_eq(jiffies, startwait + 2*HZ/OSST_POLL_PER_SEC) && notyetprinted) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 876 | { |
| 877 | printk (OSST_DEB_MSG "%s:D: Wait for frame %i (>%i): %i-%i %i (%i)\n", |
| 878 | name, curr, curr+minlast, STp->first_frame_position, |
| 879 | STp->last_frame_position, STp->cur_frames, result); |
| 880 | notyetprinted--; |
| 881 | } |
| 882 | #endif |
| 883 | msleep(1000 / OSST_POLL_PER_SEC); |
| 884 | } |
| 885 | #if DEBUG |
| 886 | printk (OSST_DEB_MSG "%s:D: Fail wait f fr %i (>%i): %i-%i %i: %3li.%li s\n", |
| 887 | name, curr, curr+minlast, STp->first_frame_position, |
| 888 | STp->last_frame_position, STp->cur_frames, |
| 889 | (jiffies-startwait)/HZ, (((jiffies-startwait)%HZ)*10)/HZ); |
| 890 | #endif |
| 891 | return -EBUSY; |
| 892 | } |
| 893 | |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 894 | static int osst_recover_wait_frame(struct osst_tape * STp, struct osst_request ** aSRpnt, int writing) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 895 | { |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 896 | struct osst_request * SRpnt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 897 | unsigned char cmd[MAX_COMMAND_SIZE]; |
| 898 | unsigned long startwait = jiffies; |
| 899 | int retval = 1; |
| 900 | char * name = tape_name(STp); |
| 901 | |
| 902 | if (writing) { |
| 903 | char mybuf[24]; |
| 904 | char * olddata = STp->buffer->b_data; |
| 905 | int oldsize = STp->buffer->buffer_size; |
| 906 | |
| 907 | /* write zero fm then read pos - if shows write error, try to recover - if no progress, wait */ |
| 908 | |
| 909 | memset(cmd, 0, MAX_COMMAND_SIZE); |
| 910 | cmd[0] = WRITE_FILEMARKS; |
| 911 | cmd[1] = 1; |
| 912 | SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, 0, DMA_NONE, STp->timeout, |
| 913 | MAX_RETRIES, 1); |
| 914 | |
| 915 | while (retval && time_before (jiffies, startwait + 5*60*HZ)) { |
| 916 | |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 917 | if (STp->buffer->syscall_result && (SRpnt->sense[2] & 0x0f) != 2) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 918 | |
| 919 | /* some failure - not just not-ready */ |
| 920 | retval = osst_write_error_recovery(STp, aSRpnt, 0); |
| 921 | break; |
| 922 | } |
Nishanth Aravamudan | a9a3047 | 2005-11-07 01:01:20 -0800 | [diff] [blame] | 923 | schedule_timeout_interruptible(HZ / OSST_POLL_PER_SEC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 924 | |
| 925 | STp->buffer->b_data = mybuf; STp->buffer->buffer_size = 24; |
| 926 | memset(cmd, 0, MAX_COMMAND_SIZE); |
| 927 | cmd[0] = READ_POSITION; |
| 928 | |
| 929 | SRpnt = osst_do_scsi(SRpnt, STp, cmd, 20, DMA_FROM_DEVICE, STp->timeout, |
| 930 | MAX_RETRIES, 1); |
| 931 | |
| 932 | retval = ( STp->buffer->syscall_result || (STp->buffer)->b_data[15] > 25 ); |
| 933 | STp->buffer->b_data = olddata; STp->buffer->buffer_size = oldsize; |
| 934 | } |
| 935 | if (retval) |
| 936 | printk(KERN_ERR "%s:E: Device did not succeed to write buffered data\n", name); |
| 937 | } else |
| 938 | /* TODO - figure out which error conditions can be handled */ |
| 939 | if (STp->buffer->syscall_result) |
| 940 | printk(KERN_WARNING |
| 941 | "%s:W: Recover_wait_frame(read) cannot handle %02x:%02x:%02x\n", name, |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 942 | (*aSRpnt)->sense[ 2] & 0x0f, |
| 943 | (*aSRpnt)->sense[12], |
| 944 | (*aSRpnt)->sense[13]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | |
| 946 | return retval; |
| 947 | } |
| 948 | |
| 949 | /* |
| 950 | * Read the next OnStream tape frame at the current location |
| 951 | */ |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 952 | static int osst_read_frame(struct osst_tape * STp, struct osst_request ** aSRpnt, int timeout) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 953 | { |
| 954 | unsigned char cmd[MAX_COMMAND_SIZE]; |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 955 | struct osst_request * SRpnt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 956 | int retval = 0; |
| 957 | #if DEBUG |
| 958 | os_aux_t * aux = STp->buffer->aux; |
| 959 | char * name = tape_name(STp); |
| 960 | #endif |
| 961 | |
| 962 | if (STp->poll) |
| 963 | if (osst_wait_frame (STp, aSRpnt, STp->first_frame_position, 0, timeout)) |
| 964 | retval = osst_recover_wait_frame(STp, aSRpnt, 0); |
| 965 | |
| 966 | memset(cmd, 0, MAX_COMMAND_SIZE); |
| 967 | cmd[0] = READ_6; |
| 968 | cmd[1] = 1; |
| 969 | cmd[4] = 1; |
| 970 | |
| 971 | #if DEBUG |
| 972 | if (debugging) |
| 973 | printk(OSST_DEB_MSG "%s:D: Reading frame from OnStream tape\n", name); |
| 974 | #endif |
| 975 | SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, OS_FRAME_SIZE, DMA_FROM_DEVICE, |
| 976 | STp->timeout, MAX_RETRIES, 1); |
| 977 | *aSRpnt = SRpnt; |
| 978 | if (!SRpnt) |
| 979 | return (-EBUSY); |
| 980 | |
| 981 | if ((STp->buffer)->syscall_result) { |
| 982 | retval = 1; |
| 983 | if (STp->read_error_frame == 0) { |
| 984 | STp->read_error_frame = STp->first_frame_position; |
| 985 | #if DEBUG |
| 986 | printk(OSST_DEB_MSG "%s:D: Recording read error at %d\n", name, STp->read_error_frame); |
| 987 | #endif |
| 988 | } |
| 989 | #if DEBUG |
| 990 | if (debugging) |
| 991 | printk(OSST_DEB_MSG "%s:D: Sense: %2x %2x %2x %2x %2x %2x %2x %2x\n", |
| 992 | name, |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 993 | SRpnt->sense[0], SRpnt->sense[1], |
| 994 | SRpnt->sense[2], SRpnt->sense[3], |
| 995 | SRpnt->sense[4], SRpnt->sense[5], |
| 996 | SRpnt->sense[6], SRpnt->sense[7]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 997 | #endif |
| 998 | } |
| 999 | else |
| 1000 | STp->first_frame_position++; |
| 1001 | #if DEBUG |
| 1002 | if (debugging) { |
| 1003 | char sig[8]; int i; |
| 1004 | for (i=0;i<4;i++) |
| 1005 | sig[i] = aux->application_sig[i]<32?'^':aux->application_sig[i]; |
| 1006 | sig[4] = '\0'; |
| 1007 | printk(OSST_DEB_MSG |
| 1008 | "%s:D: AUX: %s UpdFrCt#%d Wpass#%d %s FrSeq#%d LogBlk#%d Qty=%d Sz=%d\n", name, sig, |
| 1009 | ntohl(aux->update_frame_cntr), ntohs(aux->partition.wrt_pass_cntr), |
| 1010 | aux->frame_type==1?"EOD":aux->frame_type==2?"MARK": |
| 1011 | aux->frame_type==8?"HEADR":aux->frame_type==0x80?"DATA":"FILL", |
| 1012 | ntohl(aux->frame_seq_num), ntohl(aux->logical_blk_num), |
| 1013 | ntohs(aux->dat.dat_list[0].blk_cnt), ntohl(aux->dat.dat_list[0].blk_sz) ); |
| 1014 | if (aux->frame_type==2) |
| 1015 | printk(OSST_DEB_MSG "%s:D: mark_cnt=%d, last_mark_ppos=%d, last_mark_lbn=%d\n", name, |
| 1016 | ntohl(aux->filemark_cnt), ntohl(aux->last_mark_ppos), ntohl(aux->last_mark_lbn)); |
| 1017 | printk(OSST_DEB_MSG "%s:D: Exit read frame from OnStream tape with code %d\n", name, retval); |
| 1018 | } |
| 1019 | #endif |
| 1020 | return (retval); |
| 1021 | } |
| 1022 | |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 1023 | static int osst_initiate_read(struct osst_tape * STp, struct osst_request ** aSRpnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1024 | { |
| 1025 | struct st_partstat * STps = &(STp->ps[STp->partition]); |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 1026 | struct osst_request * SRpnt ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1027 | unsigned char cmd[MAX_COMMAND_SIZE]; |
| 1028 | int retval = 0; |
| 1029 | char * name = tape_name(STp); |
| 1030 | |
| 1031 | if (STps->rw != ST_READING) { /* Initialize read operation */ |
| 1032 | if (STps->rw == ST_WRITING || STp->dirty) { |
| 1033 | STp->write_type = OS_WRITE_DATA; |
| 1034 | osst_flush_write_buffer(STp, aSRpnt); |
| 1035 | osst_flush_drive_buffer(STp, aSRpnt); |
| 1036 | } |
| 1037 | STps->rw = ST_READING; |
| 1038 | STp->frame_in_buffer = 0; |
| 1039 | |
| 1040 | /* |
| 1041 | * Issue a read 0 command to get the OnStream drive |
| 1042 | * read frames into its buffer. |
| 1043 | */ |
| 1044 | memset(cmd, 0, MAX_COMMAND_SIZE); |
| 1045 | cmd[0] = READ_6; |
| 1046 | cmd[1] = 1; |
| 1047 | |
| 1048 | #if DEBUG |
| 1049 | printk(OSST_DEB_MSG "%s:D: Start Read Ahead on OnStream tape\n", name); |
| 1050 | #endif |
| 1051 | SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, 0, DMA_NONE, STp->timeout, MAX_RETRIES, 1); |
| 1052 | *aSRpnt = SRpnt; |
| 1053 | if ((retval = STp->buffer->syscall_result)) |
| 1054 | printk(KERN_WARNING "%s:W: Error starting read ahead\n", name); |
| 1055 | } |
| 1056 | |
| 1057 | return retval; |
| 1058 | } |
| 1059 | |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 1060 | static int osst_get_logical_frame(struct osst_tape * STp, struct osst_request ** aSRpnt, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1061 | int frame_seq_number, int quiet) |
| 1062 | { |
| 1063 | struct st_partstat * STps = &(STp->ps[STp->partition]); |
| 1064 | char * name = tape_name(STp); |
| 1065 | int cnt = 0, |
| 1066 | bad = 0, |
| 1067 | past = 0, |
| 1068 | x, |
| 1069 | position; |
| 1070 | |
| 1071 | /* |
| 1072 | * If we want just any frame (-1) and there is a frame in the buffer, return it |
| 1073 | */ |
| 1074 | if (frame_seq_number == -1 && STp->frame_in_buffer) { |
| 1075 | #if DEBUG |
| 1076 | printk(OSST_DEB_MSG "%s:D: Frame %d still in buffer\n", name, STp->frame_seq_number); |
| 1077 | #endif |
| 1078 | return (STps->eof); |
| 1079 | } |
| 1080 | /* |
| 1081 | * Search and wait for the next logical tape frame |
| 1082 | */ |
| 1083 | while (1) { |
| 1084 | if (cnt++ > 400) { |
| 1085 | printk(KERN_ERR "%s:E: Couldn't find logical frame %d, aborting\n", |
| 1086 | name, frame_seq_number); |
| 1087 | if (STp->read_error_frame) { |
| 1088 | osst_set_frame_position(STp, aSRpnt, STp->read_error_frame, 0); |
| 1089 | #if DEBUG |
| 1090 | printk(OSST_DEB_MSG "%s:D: Repositioning tape to bad frame %d\n", |
| 1091 | name, STp->read_error_frame); |
| 1092 | #endif |
| 1093 | STp->read_error_frame = 0; |
| 1094 | STp->abort_count++; |
| 1095 | } |
| 1096 | return (-EIO); |
| 1097 | } |
| 1098 | #if DEBUG |
| 1099 | if (debugging) |
| 1100 | printk(OSST_DEB_MSG "%s:D: Looking for frame %d, attempt %d\n", |
| 1101 | name, frame_seq_number, cnt); |
| 1102 | #endif |
| 1103 | if ( osst_initiate_read(STp, aSRpnt) |
| 1104 | || ( (!STp->frame_in_buffer) && osst_read_frame(STp, aSRpnt, 30) ) ) { |
| 1105 | if (STp->raw) |
| 1106 | return (-EIO); |
| 1107 | position = osst_get_frame_position(STp, aSRpnt); |
| 1108 | if (position >= 0xbae && position < 0xbb8) |
| 1109 | position = 0xbb8; |
| 1110 | else if (position > STp->eod_frame_ppos || ++bad == 10) { |
| 1111 | position = STp->read_error_frame - 1; |
| 1112 | bad = 0; |
| 1113 | } |
| 1114 | else { |
| 1115 | position += 29; |
| 1116 | cnt += 19; |
| 1117 | } |
| 1118 | #if DEBUG |
| 1119 | printk(OSST_DEB_MSG "%s:D: Bad frame detected, positioning tape to block %d\n", |
| 1120 | name, position); |
| 1121 | #endif |
| 1122 | osst_set_frame_position(STp, aSRpnt, position, 0); |
| 1123 | continue; |
| 1124 | } |
| 1125 | if (osst_verify_frame(STp, frame_seq_number, quiet)) |
| 1126 | break; |
| 1127 | if (osst_verify_frame(STp, -1, quiet)) { |
| 1128 | x = ntohl(STp->buffer->aux->frame_seq_num); |
| 1129 | if (STp->fast_open) { |
| 1130 | printk(KERN_WARNING |
| 1131 | "%s:W: Found logical frame %d instead of %d after fast open\n", |
| 1132 | name, x, frame_seq_number); |
| 1133 | STp->header_ok = 0; |
| 1134 | STp->read_error_frame = 0; |
| 1135 | return (-EIO); |
| 1136 | } |
| 1137 | if (x > frame_seq_number) { |
| 1138 | if (++past > 3) { |
| 1139 | /* positioning backwards did not bring us to the desired frame */ |
| 1140 | position = STp->read_error_frame - 1; |
| 1141 | } |
| 1142 | else { |
| 1143 | position = osst_get_frame_position(STp, aSRpnt) |
| 1144 | + frame_seq_number - x - 1; |
| 1145 | |
| 1146 | if (STp->first_frame_position >= 3000 && position < 3000) |
| 1147 | position -= 10; |
| 1148 | } |
| 1149 | #if DEBUG |
| 1150 | printk(OSST_DEB_MSG |
| 1151 | "%s:D: Found logical frame %d while looking for %d: back up %d\n", |
| 1152 | name, x, frame_seq_number, |
| 1153 | STp->first_frame_position - position); |
| 1154 | #endif |
| 1155 | osst_set_frame_position(STp, aSRpnt, position, 0); |
| 1156 | cnt += 10; |
| 1157 | } |
| 1158 | else |
| 1159 | past = 0; |
| 1160 | } |
| 1161 | if (osst_get_frame_position(STp, aSRpnt) == 0xbaf) { |
| 1162 | #if DEBUG |
| 1163 | printk(OSST_DEB_MSG "%s:D: Skipping config partition\n", name); |
| 1164 | #endif |
| 1165 | osst_set_frame_position(STp, aSRpnt, 0xbb8, 0); |
| 1166 | cnt--; |
| 1167 | } |
| 1168 | STp->frame_in_buffer = 0; |
| 1169 | } |
| 1170 | if (cnt > 1) { |
| 1171 | STp->recover_count++; |
| 1172 | STp->recover_erreg++; |
| 1173 | printk(KERN_WARNING "%s:I: Don't worry, Read error at position %d recovered\n", |
| 1174 | name, STp->read_error_frame); |
| 1175 | } |
| 1176 | STp->read_count++; |
| 1177 | |
| 1178 | #if DEBUG |
| 1179 | if (debugging || STps->eof) |
| 1180 | printk(OSST_DEB_MSG |
| 1181 | "%s:D: Exit get logical frame (%d=>%d) from OnStream tape with code %d\n", |
| 1182 | name, frame_seq_number, STp->frame_seq_number, STps->eof); |
| 1183 | #endif |
| 1184 | STp->fast_open = 0; |
| 1185 | STp->read_error_frame = 0; |
| 1186 | return (STps->eof); |
| 1187 | } |
| 1188 | |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 1189 | static int osst_seek_logical_blk(struct osst_tape * STp, struct osst_request ** aSRpnt, int logical_blk_num) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1190 | { |
| 1191 | struct st_partstat * STps = &(STp->ps[STp->partition]); |
| 1192 | char * name = tape_name(STp); |
| 1193 | int retries = 0; |
| 1194 | int frame_seq_estimate, ppos_estimate, move; |
| 1195 | |
| 1196 | if (logical_blk_num < 0) logical_blk_num = 0; |
| 1197 | #if DEBUG |
| 1198 | printk(OSST_DEB_MSG "%s:D: Seeking logical block %d (now at %d, size %d%c)\n", |
| 1199 | name, logical_blk_num, STp->logical_blk_num, |
| 1200 | STp->block_size<1024?STp->block_size:STp->block_size/1024, |
| 1201 | STp->block_size<1024?'b':'k'); |
| 1202 | #endif |
| 1203 | /* Do we know where we are? */ |
| 1204 | if (STps->drv_block >= 0) { |
| 1205 | move = logical_blk_num - STp->logical_blk_num; |
| 1206 | if (move < 0) move -= (OS_DATA_SIZE / STp->block_size) - 1; |
| 1207 | move /= (OS_DATA_SIZE / STp->block_size); |
| 1208 | frame_seq_estimate = STp->frame_seq_number + move; |
| 1209 | } else |
| 1210 | frame_seq_estimate = logical_blk_num * STp->block_size / OS_DATA_SIZE; |
| 1211 | |
| 1212 | if (frame_seq_estimate < 2980) ppos_estimate = frame_seq_estimate + 10; |
| 1213 | else ppos_estimate = frame_seq_estimate + 20; |
| 1214 | while (++retries < 10) { |
| 1215 | if (ppos_estimate > STp->eod_frame_ppos-2) { |
| 1216 | frame_seq_estimate += STp->eod_frame_ppos - 2 - ppos_estimate; |
| 1217 | ppos_estimate = STp->eod_frame_ppos - 2; |
| 1218 | } |
| 1219 | if (frame_seq_estimate < 0) { |
| 1220 | frame_seq_estimate = 0; |
| 1221 | ppos_estimate = 10; |
| 1222 | } |
| 1223 | osst_set_frame_position(STp, aSRpnt, ppos_estimate, 0); |
| 1224 | if (osst_get_logical_frame(STp, aSRpnt, frame_seq_estimate, 1) >= 0) { |
| 1225 | /* we've located the estimated frame, now does it have our block? */ |
| 1226 | if (logical_blk_num < STp->logical_blk_num || |
| 1227 | logical_blk_num >= STp->logical_blk_num + ntohs(STp->buffer->aux->dat.dat_list[0].blk_cnt)) { |
| 1228 | if (STps->eof == ST_FM_HIT) |
| 1229 | move = logical_blk_num < STp->logical_blk_num? -2 : 1; |
| 1230 | else { |
| 1231 | move = logical_blk_num - STp->logical_blk_num; |
| 1232 | if (move < 0) move -= (OS_DATA_SIZE / STp->block_size) - 1; |
| 1233 | move /= (OS_DATA_SIZE / STp->block_size); |
| 1234 | } |
| 1235 | if (!move) move = logical_blk_num > STp->logical_blk_num ? 1 : -1; |
| 1236 | #if DEBUG |
| 1237 | printk(OSST_DEB_MSG |
| 1238 | "%s:D: Seek retry %d at ppos %d fsq %d (est %d) lbn %d (need %d) move %d\n", |
| 1239 | name, retries, ppos_estimate, STp->frame_seq_number, frame_seq_estimate, |
| 1240 | STp->logical_blk_num, logical_blk_num, move); |
| 1241 | #endif |
| 1242 | frame_seq_estimate += move; |
| 1243 | ppos_estimate += move; |
| 1244 | continue; |
| 1245 | } else { |
| 1246 | STp->buffer->read_pointer = (logical_blk_num - STp->logical_blk_num) * STp->block_size; |
| 1247 | STp->buffer->buffer_bytes -= STp->buffer->read_pointer; |
| 1248 | STp->logical_blk_num = logical_blk_num; |
| 1249 | #if DEBUG |
| 1250 | printk(OSST_DEB_MSG |
| 1251 | "%s:D: Seek success at ppos %d fsq %d in_buf %d, bytes %d, ptr %d*%d\n", |
| 1252 | name, ppos_estimate, STp->frame_seq_number, STp->frame_in_buffer, |
| 1253 | STp->buffer->buffer_bytes, STp->buffer->read_pointer / STp->block_size, |
| 1254 | STp->block_size); |
| 1255 | #endif |
| 1256 | STps->drv_file = ntohl(STp->buffer->aux->filemark_cnt); |
| 1257 | if (STps->eof == ST_FM_HIT) { |
| 1258 | STps->drv_file++; |
| 1259 | STps->drv_block = 0; |
| 1260 | } else { |
| 1261 | STps->drv_block = ntohl(STp->buffer->aux->last_mark_lbn)? |
| 1262 | STp->logical_blk_num - |
| 1263 | (STps->drv_file ? ntohl(STp->buffer->aux->last_mark_lbn) + 1 : 0): |
| 1264 | -1; |
| 1265 | } |
| 1266 | STps->eof = (STp->first_frame_position >= STp->eod_frame_ppos)?ST_EOD:ST_NOEOF; |
| 1267 | return 0; |
| 1268 | } |
| 1269 | } |
| 1270 | if (osst_get_logical_frame(STp, aSRpnt, -1, 1) < 0) |
| 1271 | goto error; |
| 1272 | /* we are not yet at the estimated frame, adjust our estimate of its physical position */ |
| 1273 | #if DEBUG |
| 1274 | printk(OSST_DEB_MSG "%s:D: Seek retry %d at ppos %d fsq %d (est %d) lbn %d (need %d)\n", |
| 1275 | name, retries, ppos_estimate, STp->frame_seq_number, frame_seq_estimate, |
| 1276 | STp->logical_blk_num, logical_blk_num); |
| 1277 | #endif |
| 1278 | if (frame_seq_estimate != STp->frame_seq_number) |
| 1279 | ppos_estimate += frame_seq_estimate - STp->frame_seq_number; |
| 1280 | else |
| 1281 | break; |
| 1282 | } |
| 1283 | error: |
| 1284 | printk(KERN_ERR "%s:E: Couldn't seek to logical block %d (at %d), %d retries\n", |
| 1285 | name, logical_blk_num, STp->logical_blk_num, retries); |
| 1286 | return (-EIO); |
| 1287 | } |
| 1288 | |
| 1289 | /* The values below are based on the OnStream frame payload size of 32K == 2**15, |
| 1290 | * that is, OSST_FRAME_SHIFT + OSST_SECTOR_SHIFT must be 15. With a minimum block |
| 1291 | * size of 512 bytes, we need to be able to resolve 32K/512 == 64 == 2**6 positions |
| 1292 | * inside each frame. Finaly, OSST_SECTOR_MASK == 2**OSST_FRAME_SHIFT - 1. |
| 1293 | */ |
| 1294 | #define OSST_FRAME_SHIFT 6 |
| 1295 | #define OSST_SECTOR_SHIFT 9 |
| 1296 | #define OSST_SECTOR_MASK 0x03F |
| 1297 | |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 1298 | static int osst_get_sector(struct osst_tape * STp, struct osst_request ** aSRpnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1299 | { |
| 1300 | int sector; |
| 1301 | #if DEBUG |
| 1302 | char * name = tape_name(STp); |
| 1303 | |
| 1304 | printk(OSST_DEB_MSG |
| 1305 | "%s:D: Positioned at ppos %d, frame %d, lbn %d, file %d, blk %d, %cptr %d, eof %d\n", |
| 1306 | name, STp->first_frame_position, STp->frame_seq_number, STp->logical_blk_num, |
| 1307 | STp->ps[STp->partition].drv_file, STp->ps[STp->partition].drv_block, |
| 1308 | STp->ps[STp->partition].rw == ST_WRITING?'w':'r', |
| 1309 | STp->ps[STp->partition].rw == ST_WRITING?STp->buffer->buffer_bytes: |
| 1310 | STp->buffer->read_pointer, STp->ps[STp->partition].eof); |
| 1311 | #endif |
| 1312 | /* do we know where we are inside a file? */ |
| 1313 | if (STp->ps[STp->partition].drv_block >= 0) { |
| 1314 | sector = (STp->frame_in_buffer ? STp->first_frame_position-1 : |
| 1315 | STp->first_frame_position) << OSST_FRAME_SHIFT; |
| 1316 | if (STp->ps[STp->partition].rw == ST_WRITING) |
| 1317 | sector |= (STp->buffer->buffer_bytes >> OSST_SECTOR_SHIFT) & OSST_SECTOR_MASK; |
| 1318 | else |
| 1319 | sector |= (STp->buffer->read_pointer >> OSST_SECTOR_SHIFT) & OSST_SECTOR_MASK; |
| 1320 | } else { |
| 1321 | sector = osst_get_frame_position(STp, aSRpnt); |
| 1322 | if (sector > 0) |
| 1323 | sector <<= OSST_FRAME_SHIFT; |
| 1324 | } |
| 1325 | return sector; |
| 1326 | } |
| 1327 | |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 1328 | static int osst_seek_sector(struct osst_tape * STp, struct osst_request ** aSRpnt, int sector) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1329 | { |
| 1330 | struct st_partstat * STps = &(STp->ps[STp->partition]); |
| 1331 | int frame = sector >> OSST_FRAME_SHIFT, |
| 1332 | offset = (sector & OSST_SECTOR_MASK) << OSST_SECTOR_SHIFT, |
| 1333 | r; |
| 1334 | #if DEBUG |
| 1335 | char * name = tape_name(STp); |
| 1336 | |
| 1337 | printk(OSST_DEB_MSG "%s:D: Seeking sector %d in frame %d at offset %d\n", |
| 1338 | name, sector, frame, offset); |
| 1339 | #endif |
| 1340 | if (frame < 0 || frame >= STp->capacity) return (-ENXIO); |
| 1341 | |
| 1342 | if (frame <= STp->first_data_ppos) { |
| 1343 | STp->frame_seq_number = STp->logical_blk_num = STps->drv_file = STps->drv_block = 0; |
| 1344 | return (osst_set_frame_position(STp, aSRpnt, frame, 0)); |
| 1345 | } |
| 1346 | r = osst_set_frame_position(STp, aSRpnt, offset?frame:frame-1, 0); |
| 1347 | if (r < 0) return r; |
| 1348 | |
| 1349 | r = osst_get_logical_frame(STp, aSRpnt, -1, 1); |
| 1350 | if (r < 0) return r; |
| 1351 | |
| 1352 | if (osst_get_frame_position(STp, aSRpnt) != (offset?frame+1:frame)) return (-EIO); |
| 1353 | |
| 1354 | if (offset) { |
| 1355 | STp->logical_blk_num += offset / STp->block_size; |
| 1356 | STp->buffer->read_pointer = offset; |
| 1357 | STp->buffer->buffer_bytes -= offset; |
| 1358 | } else { |
| 1359 | STp->frame_seq_number++; |
| 1360 | STp->frame_in_buffer = 0; |
| 1361 | STp->logical_blk_num += ntohs(STp->buffer->aux->dat.dat_list[0].blk_cnt); |
| 1362 | STp->buffer->buffer_bytes = STp->buffer->read_pointer = 0; |
| 1363 | } |
| 1364 | STps->drv_file = ntohl(STp->buffer->aux->filemark_cnt); |
| 1365 | if (STps->eof == ST_FM_HIT) { |
| 1366 | STps->drv_file++; |
| 1367 | STps->drv_block = 0; |
| 1368 | } else { |
| 1369 | STps->drv_block = ntohl(STp->buffer->aux->last_mark_lbn)? |
| 1370 | STp->logical_blk_num - |
| 1371 | (STps->drv_file ? ntohl(STp->buffer->aux->last_mark_lbn) + 1 : 0): |
| 1372 | -1; |
| 1373 | } |
| 1374 | STps->eof = (STp->first_frame_position >= STp->eod_frame_ppos)?ST_EOD:ST_NOEOF; |
| 1375 | #if DEBUG |
| 1376 | printk(OSST_DEB_MSG |
| 1377 | "%s:D: Now positioned at ppos %d, frame %d, lbn %d, file %d, blk %d, rptr %d, eof %d\n", |
| 1378 | name, STp->first_frame_position, STp->frame_seq_number, STp->logical_blk_num, |
| 1379 | STps->drv_file, STps->drv_block, STp->buffer->read_pointer, STps->eof); |
| 1380 | #endif |
| 1381 | return 0; |
| 1382 | } |
| 1383 | |
| 1384 | /* |
| 1385 | * Read back the drive's internal buffer contents, as a part |
| 1386 | * of the write error recovery mechanism for old OnStream |
| 1387 | * firmware revisions. |
| 1388 | * Precondition for this function to work: all frames in the |
| 1389 | * drive's buffer must be of one type (DATA, MARK or EOD)! |
| 1390 | */ |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 1391 | static int osst_read_back_buffer_and_rewrite(struct osst_tape * STp, struct osst_request ** aSRpnt, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1392 | unsigned int frame, unsigned int skip, int pending) |
| 1393 | { |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 1394 | struct osst_request * SRpnt = * aSRpnt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1395 | unsigned char * buffer, * p; |
| 1396 | unsigned char cmd[MAX_COMMAND_SIZE]; |
| 1397 | int flag, new_frame, i; |
| 1398 | int nframes = STp->cur_frames; |
| 1399 | int blks_per_frame = ntohs(STp->buffer->aux->dat.dat_list[0].blk_cnt); |
| 1400 | int frame_seq_number = ntohl(STp->buffer->aux->frame_seq_num) |
| 1401 | - (nframes + pending - 1); |
| 1402 | int logical_blk_num = ntohl(STp->buffer->aux->logical_blk_num) |
| 1403 | - (nframes + pending - 1) * blks_per_frame; |
| 1404 | char * name = tape_name(STp); |
| 1405 | unsigned long startwait = jiffies; |
| 1406 | #if DEBUG |
| 1407 | int dbg = debugging; |
| 1408 | #endif |
| 1409 | |
| 1410 | if ((buffer = (unsigned char *)vmalloc((nframes + 1) * OS_DATA_SIZE)) == NULL) |
| 1411 | return (-EIO); |
| 1412 | |
| 1413 | printk(KERN_INFO "%s:I: Reading back %d frames from drive buffer%s\n", |
| 1414 | name, nframes, pending?" and one that was pending":""); |
| 1415 | |
| 1416 | osst_copy_from_buffer(STp->buffer, (p = &buffer[nframes * OS_DATA_SIZE])); |
| 1417 | #if DEBUG |
| 1418 | if (pending && debugging) |
| 1419 | printk(OSST_DEB_MSG "%s:D: Pending frame %d (lblk %d), data %02x %02x %02x %02x\n", |
| 1420 | name, frame_seq_number + nframes, |
| 1421 | logical_blk_num + nframes * blks_per_frame, |
| 1422 | p[0], p[1], p[2], p[3]); |
| 1423 | #endif |
| 1424 | for (i = 0, p = buffer; i < nframes; i++, p += OS_DATA_SIZE) { |
| 1425 | |
| 1426 | memset(cmd, 0, MAX_COMMAND_SIZE); |
| 1427 | cmd[0] = 0x3C; /* Buffer Read */ |
| 1428 | cmd[1] = 6; /* Retrieve Faulty Block */ |
| 1429 | cmd[7] = 32768 >> 8; |
| 1430 | cmd[8] = 32768 & 0xff; |
| 1431 | |
| 1432 | SRpnt = osst_do_scsi(SRpnt, STp, cmd, OS_FRAME_SIZE, DMA_FROM_DEVICE, |
| 1433 | STp->timeout, MAX_RETRIES, 1); |
| 1434 | |
| 1435 | if ((STp->buffer)->syscall_result || !SRpnt) { |
| 1436 | printk(KERN_ERR "%s:E: Failed to read frame back from OnStream buffer\n", name); |
Jesper Juhl | f9101210 | 2005-09-10 00:26:54 -0700 | [diff] [blame] | 1437 | vfree(buffer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1438 | *aSRpnt = SRpnt; |
| 1439 | return (-EIO); |
| 1440 | } |
| 1441 | osst_copy_from_buffer(STp->buffer, p); |
| 1442 | #if DEBUG |
| 1443 | if (debugging) |
| 1444 | printk(OSST_DEB_MSG "%s:D: Read back logical frame %d, data %02x %02x %02x %02x\n", |
| 1445 | name, frame_seq_number + i, p[0], p[1], p[2], p[3]); |
| 1446 | #endif |
| 1447 | } |
| 1448 | *aSRpnt = SRpnt; |
| 1449 | osst_get_frame_position(STp, aSRpnt); |
| 1450 | |
| 1451 | #if DEBUG |
| 1452 | printk(OSST_DEB_MSG "%s:D: Frames left in buffer: %d\n", name, STp->cur_frames); |
| 1453 | #endif |
| 1454 | /* Write synchronously so we can be sure we're OK again and don't have to recover recursively */ |
| 1455 | /* In the header we don't actually re-write the frames that fail, just the ones after them */ |
| 1456 | |
| 1457 | for (flag=1, new_frame=frame, p=buffer, i=0; i < nframes + pending; ) { |
| 1458 | |
| 1459 | if (flag) { |
| 1460 | if (STp->write_type == OS_WRITE_HEADER) { |
| 1461 | i += skip; |
| 1462 | p += skip * OS_DATA_SIZE; |
| 1463 | } |
| 1464 | else if (new_frame < 2990 && new_frame+skip+nframes+pending >= 2990) |
| 1465 | new_frame = 3000-i; |
| 1466 | else |
| 1467 | new_frame += skip; |
| 1468 | #if DEBUG |
| 1469 | printk(OSST_DEB_MSG "%s:D: Position to frame %d, write fseq %d\n", |
| 1470 | name, new_frame+i, frame_seq_number+i); |
| 1471 | #endif |
| 1472 | osst_set_frame_position(STp, aSRpnt, new_frame + i, 0); |
| 1473 | osst_wait_ready(STp, aSRpnt, 60, OSST_WAIT_POSITION_COMPLETE); |
| 1474 | osst_get_frame_position(STp, aSRpnt); |
| 1475 | SRpnt = * aSRpnt; |
| 1476 | |
| 1477 | if (new_frame > frame + 1000) { |
| 1478 | printk(KERN_ERR "%s:E: Failed to find writable tape media\n", name); |
Jesper Juhl | f9101210 | 2005-09-10 00:26:54 -0700 | [diff] [blame] | 1479 | vfree(buffer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1480 | return (-EIO); |
| 1481 | } |
| 1482 | if ( i >= nframes + pending ) break; |
| 1483 | flag = 0; |
| 1484 | } |
| 1485 | osst_copy_to_buffer(STp->buffer, p); |
| 1486 | /* |
| 1487 | * IMPORTANT: for error recovery to work, _never_ queue frames with mixed frame type! |
| 1488 | */ |
| 1489 | osst_init_aux(STp, STp->buffer->aux->frame_type, frame_seq_number+i, |
| 1490 | logical_blk_num + i*blks_per_frame, |
| 1491 | ntohl(STp->buffer->aux->dat.dat_list[0].blk_sz), blks_per_frame); |
| 1492 | memset(cmd, 0, MAX_COMMAND_SIZE); |
| 1493 | cmd[0] = WRITE_6; |
| 1494 | cmd[1] = 1; |
| 1495 | cmd[4] = 1; |
| 1496 | |
| 1497 | #if DEBUG |
| 1498 | if (debugging) |
| 1499 | printk(OSST_DEB_MSG |
| 1500 | "%s:D: About to write frame %d, seq %d, lbn %d, data %02x %02x %02x %02x\n", |
| 1501 | name, new_frame+i, frame_seq_number+i, logical_blk_num + i*blks_per_frame, |
| 1502 | p[0], p[1], p[2], p[3]); |
| 1503 | #endif |
| 1504 | SRpnt = osst_do_scsi(SRpnt, STp, cmd, OS_FRAME_SIZE, DMA_TO_DEVICE, |
| 1505 | STp->timeout, MAX_RETRIES, 1); |
| 1506 | |
| 1507 | if (STp->buffer->syscall_result) |
| 1508 | flag = 1; |
| 1509 | else { |
| 1510 | p += OS_DATA_SIZE; i++; |
| 1511 | |
| 1512 | /* if we just sent the last frame, wait till all successfully written */ |
| 1513 | if ( i == nframes + pending ) { |
| 1514 | #if DEBUG |
| 1515 | printk(OSST_DEB_MSG "%s:D: Check re-write successful\n", name); |
| 1516 | #endif |
| 1517 | memset(cmd, 0, MAX_COMMAND_SIZE); |
| 1518 | cmd[0] = WRITE_FILEMARKS; |
| 1519 | cmd[1] = 1; |
| 1520 | SRpnt = osst_do_scsi(SRpnt, STp, cmd, 0, DMA_NONE, |
| 1521 | STp->timeout, MAX_RETRIES, 1); |
| 1522 | #if DEBUG |
| 1523 | if (debugging) { |
| 1524 | printk(OSST_DEB_MSG "%s:D: Sleeping in re-write wait ready\n", name); |
| 1525 | printk(OSST_DEB_MSG "%s:D: Turning off debugging for a while\n", name); |
| 1526 | debugging = 0; |
| 1527 | } |
| 1528 | #endif |
| 1529 | flag = STp->buffer->syscall_result; |
| 1530 | while ( !flag && time_before(jiffies, startwait + 60*HZ) ) { |
| 1531 | |
| 1532 | memset(cmd, 0, MAX_COMMAND_SIZE); |
| 1533 | cmd[0] = TEST_UNIT_READY; |
| 1534 | |
| 1535 | SRpnt = osst_do_scsi(SRpnt, STp, cmd, 0, DMA_NONE, STp->timeout, |
| 1536 | MAX_RETRIES, 1); |
| 1537 | |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 1538 | if (SRpnt->sense[2] == 2 && SRpnt->sense[12] == 4 && |
| 1539 | (SRpnt->sense[13] == 1 || SRpnt->sense[13] == 8)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1540 | /* in the process of becoming ready */ |
| 1541 | msleep(100); |
| 1542 | continue; |
| 1543 | } |
| 1544 | if (STp->buffer->syscall_result) |
| 1545 | flag = 1; |
| 1546 | break; |
| 1547 | } |
| 1548 | #if DEBUG |
| 1549 | debugging = dbg; |
| 1550 | printk(OSST_DEB_MSG "%s:D: Wait re-write finished\n", name); |
| 1551 | #endif |
| 1552 | } |
| 1553 | } |
| 1554 | *aSRpnt = SRpnt; |
| 1555 | if (flag) { |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 1556 | if ((SRpnt->sense[ 2] & 0x0f) == 13 && |
| 1557 | SRpnt->sense[12] == 0 && |
| 1558 | SRpnt->sense[13] == 2) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1559 | printk(KERN_ERR "%s:E: Volume overflow in write error recovery\n", name); |
Jesper Juhl | f9101210 | 2005-09-10 00:26:54 -0700 | [diff] [blame] | 1560 | vfree(buffer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1561 | return (-EIO); /* hit end of tape = fail */ |
| 1562 | } |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 1563 | i = ((SRpnt->sense[3] << 24) | |
| 1564 | (SRpnt->sense[4] << 16) | |
| 1565 | (SRpnt->sense[5] << 8) | |
| 1566 | SRpnt->sense[6] ) - new_frame; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1567 | p = &buffer[i * OS_DATA_SIZE]; |
| 1568 | #if DEBUG |
| 1569 | printk(OSST_DEB_MSG "%s:D: Additional write error at %d\n", name, new_frame+i); |
| 1570 | #endif |
| 1571 | osst_get_frame_position(STp, aSRpnt); |
| 1572 | #if DEBUG |
| 1573 | printk(OSST_DEB_MSG "%s:D: reported frame positions: host = %d, tape = %d, buffer = %d\n", |
| 1574 | name, STp->first_frame_position, STp->last_frame_position, STp->cur_frames); |
| 1575 | #endif |
| 1576 | } |
| 1577 | } |
| 1578 | if (flag) { |
| 1579 | /* error recovery did not successfully complete */ |
| 1580 | printk(KERN_ERR "%s:D: Write error recovery failed in %s\n", name, |
| 1581 | STp->write_type == OS_WRITE_HEADER?"header":"body"); |
| 1582 | } |
| 1583 | if (!pending) |
| 1584 | osst_copy_to_buffer(STp->buffer, p); /* so buffer content == at entry in all cases */ |
Jesper Juhl | f9101210 | 2005-09-10 00:26:54 -0700 | [diff] [blame] | 1585 | vfree(buffer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1586 | return 0; |
| 1587 | } |
| 1588 | |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 1589 | static int osst_reposition_and_retry(struct osst_tape * STp, struct osst_request ** aSRpnt, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1590 | unsigned int frame, unsigned int skip, int pending) |
| 1591 | { |
| 1592 | unsigned char cmd[MAX_COMMAND_SIZE]; |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 1593 | struct osst_request * SRpnt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1594 | char * name = tape_name(STp); |
| 1595 | int expected = 0; |
| 1596 | int attempts = 1000 / skip; |
| 1597 | int flag = 1; |
| 1598 | unsigned long startwait = jiffies; |
| 1599 | #if DEBUG |
| 1600 | int dbg = debugging; |
| 1601 | #endif |
| 1602 | |
| 1603 | while (attempts && time_before(jiffies, startwait + 60*HZ)) { |
| 1604 | if (flag) { |
| 1605 | #if DEBUG |
| 1606 | debugging = dbg; |
| 1607 | #endif |
| 1608 | if (frame < 2990 && frame+skip+STp->cur_frames+pending >= 2990) |
| 1609 | frame = 3000-skip; |
| 1610 | expected = frame+skip+STp->cur_frames+pending; |
| 1611 | #if DEBUG |
| 1612 | printk(OSST_DEB_MSG "%s:D: Position to fppos %d, re-write from fseq %d\n", |
| 1613 | name, frame+skip, STp->frame_seq_number-STp->cur_frames-pending); |
| 1614 | #endif |
| 1615 | osst_set_frame_position(STp, aSRpnt, frame + skip, 1); |
| 1616 | flag = 0; |
| 1617 | attempts--; |
Nishanth Aravamudan | a9a3047 | 2005-11-07 01:01:20 -0800 | [diff] [blame] | 1618 | schedule_timeout_interruptible(msecs_to_jiffies(100)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1619 | } |
| 1620 | if (osst_get_frame_position(STp, aSRpnt) < 0) { /* additional write error */ |
| 1621 | #if DEBUG |
| 1622 | printk(OSST_DEB_MSG "%s:D: Addl error, host %d, tape %d, buffer %d\n", |
| 1623 | name, STp->first_frame_position, |
| 1624 | STp->last_frame_position, STp->cur_frames); |
| 1625 | #endif |
| 1626 | frame = STp->last_frame_position; |
| 1627 | flag = 1; |
| 1628 | continue; |
| 1629 | } |
| 1630 | if (pending && STp->cur_frames < 50) { |
| 1631 | |
| 1632 | memset(cmd, 0, MAX_COMMAND_SIZE); |
| 1633 | cmd[0] = WRITE_6; |
| 1634 | cmd[1] = 1; |
| 1635 | cmd[4] = 1; |
| 1636 | #if DEBUG |
| 1637 | printk(OSST_DEB_MSG "%s:D: About to write pending fseq %d at fppos %d\n", |
| 1638 | name, STp->frame_seq_number-1, STp->first_frame_position); |
| 1639 | #endif |
| 1640 | SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, OS_FRAME_SIZE, DMA_TO_DEVICE, |
| 1641 | STp->timeout, MAX_RETRIES, 1); |
| 1642 | *aSRpnt = SRpnt; |
| 1643 | |
| 1644 | if (STp->buffer->syscall_result) { /* additional write error */ |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 1645 | if ((SRpnt->sense[ 2] & 0x0f) == 13 && |
| 1646 | SRpnt->sense[12] == 0 && |
| 1647 | SRpnt->sense[13] == 2) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1648 | printk(KERN_ERR |
| 1649 | "%s:E: Volume overflow in write error recovery\n", |
| 1650 | name); |
| 1651 | break; /* hit end of tape = fail */ |
| 1652 | } |
| 1653 | flag = 1; |
| 1654 | } |
| 1655 | else |
| 1656 | pending = 0; |
| 1657 | |
| 1658 | continue; |
| 1659 | } |
| 1660 | if (STp->cur_frames == 0) { |
| 1661 | #if DEBUG |
| 1662 | debugging = dbg; |
| 1663 | printk(OSST_DEB_MSG "%s:D: Wait re-write finished\n", name); |
| 1664 | #endif |
| 1665 | if (STp->first_frame_position != expected) { |
| 1666 | printk(KERN_ERR "%s:A: Actual position %d - expected %d\n", |
| 1667 | name, STp->first_frame_position, expected); |
| 1668 | return (-EIO); |
| 1669 | } |
| 1670 | return 0; |
| 1671 | } |
| 1672 | #if DEBUG |
| 1673 | if (debugging) { |
| 1674 | printk(OSST_DEB_MSG "%s:D: Sleeping in re-write wait ready\n", name); |
| 1675 | printk(OSST_DEB_MSG "%s:D: Turning off debugging for a while\n", name); |
| 1676 | debugging = 0; |
| 1677 | } |
| 1678 | #endif |
Nishanth Aravamudan | a9a3047 | 2005-11-07 01:01:20 -0800 | [diff] [blame] | 1679 | schedule_timeout_interruptible(msecs_to_jiffies(100)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1680 | } |
| 1681 | printk(KERN_ERR "%s:E: Failed to find valid tape media\n", name); |
| 1682 | #if DEBUG |
| 1683 | debugging = dbg; |
| 1684 | #endif |
| 1685 | return (-EIO); |
| 1686 | } |
| 1687 | |
| 1688 | /* |
| 1689 | * Error recovery algorithm for the OnStream tape. |
| 1690 | */ |
| 1691 | |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 1692 | static int osst_write_error_recovery(struct osst_tape * STp, struct osst_request ** aSRpnt, int pending) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1693 | { |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 1694 | struct osst_request * SRpnt = * aSRpnt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1695 | struct st_partstat * STps = & STp->ps[STp->partition]; |
| 1696 | char * name = tape_name(STp); |
| 1697 | int retval = 0; |
| 1698 | int rw_state; |
| 1699 | unsigned int frame, skip; |
| 1700 | |
| 1701 | rw_state = STps->rw; |
| 1702 | |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 1703 | if ((SRpnt->sense[ 2] & 0x0f) != 3 |
| 1704 | || SRpnt->sense[12] != 12 |
| 1705 | || SRpnt->sense[13] != 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1706 | #if DEBUG |
| 1707 | printk(OSST_DEB_MSG "%s:D: Write error recovery cannot handle %02x:%02x:%02x\n", name, |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 1708 | SRpnt->sense[2], SRpnt->sense[12], SRpnt->sense[13]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1709 | #endif |
| 1710 | return (-EIO); |
| 1711 | } |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 1712 | frame = (SRpnt->sense[3] << 24) | |
| 1713 | (SRpnt->sense[4] << 16) | |
| 1714 | (SRpnt->sense[5] << 8) | |
| 1715 | SRpnt->sense[6]; |
| 1716 | skip = SRpnt->sense[9]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1717 | |
| 1718 | #if DEBUG |
| 1719 | printk(OSST_DEB_MSG "%s:D: Detected physical bad frame at %u, advised to skip %d\n", name, frame, skip); |
| 1720 | #endif |
| 1721 | osst_get_frame_position(STp, aSRpnt); |
| 1722 | #if DEBUG |
| 1723 | printk(OSST_DEB_MSG "%s:D: reported frame positions: host = %d, tape = %d\n", |
| 1724 | name, STp->first_frame_position, STp->last_frame_position); |
| 1725 | #endif |
| 1726 | switch (STp->write_type) { |
| 1727 | case OS_WRITE_DATA: |
| 1728 | case OS_WRITE_EOD: |
| 1729 | case OS_WRITE_NEW_MARK: |
| 1730 | printk(KERN_WARNING |
| 1731 | "%s:I: Relocating %d buffered logical frames from position %u to %u\n", |
| 1732 | name, STp->cur_frames, frame, (frame + skip > 3000 && frame < 3000)?3000:frame + skip); |
| 1733 | if (STp->os_fw_rev >= 10600) |
| 1734 | retval = osst_reposition_and_retry(STp, aSRpnt, frame, skip, pending); |
| 1735 | else |
| 1736 | retval = osst_read_back_buffer_and_rewrite(STp, aSRpnt, frame, skip, pending); |
| 1737 | printk(KERN_WARNING "%s:%s: %sWrite error%srecovered\n", name, |
| 1738 | retval?"E" :"I", |
| 1739 | retval?"" :"Don't worry, ", |
| 1740 | retval?" not ":" "); |
| 1741 | break; |
| 1742 | case OS_WRITE_LAST_MARK: |
| 1743 | printk(KERN_ERR "%s:E: Bad frame in update last marker, fatal\n", name); |
| 1744 | osst_set_frame_position(STp, aSRpnt, frame + STp->cur_frames + pending, 0); |
| 1745 | retval = -EIO; |
| 1746 | break; |
| 1747 | case OS_WRITE_HEADER: |
| 1748 | printk(KERN_WARNING "%s:I: Bad frame in header partition, skipped\n", name); |
| 1749 | retval = osst_read_back_buffer_and_rewrite(STp, aSRpnt, frame, 1, pending); |
| 1750 | break; |
| 1751 | default: |
| 1752 | printk(KERN_INFO "%s:I: Bad frame in filler, ignored\n", name); |
| 1753 | osst_set_frame_position(STp, aSRpnt, frame + STp->cur_frames + pending, 0); |
| 1754 | } |
| 1755 | osst_get_frame_position(STp, aSRpnt); |
| 1756 | #if DEBUG |
| 1757 | printk(OSST_DEB_MSG "%s:D: Positioning complete, cur_frames %d, pos %d, tape pos %d\n", |
| 1758 | name, STp->cur_frames, STp->first_frame_position, STp->last_frame_position); |
| 1759 | printk(OSST_DEB_MSG "%s:D: next logical frame to write: %d\n", name, STp->logical_blk_num); |
| 1760 | #endif |
| 1761 | if (retval == 0) { |
| 1762 | STp->recover_count++; |
| 1763 | STp->recover_erreg++; |
| 1764 | } else |
| 1765 | STp->abort_count++; |
| 1766 | |
| 1767 | STps->rw = rw_state; |
| 1768 | return retval; |
| 1769 | } |
| 1770 | |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 1771 | static int osst_space_over_filemarks_backward(struct osst_tape * STp, struct osst_request ** aSRpnt, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1772 | int mt_op, int mt_count) |
| 1773 | { |
| 1774 | char * name = tape_name(STp); |
| 1775 | int cnt; |
| 1776 | int last_mark_ppos = -1; |
| 1777 | |
| 1778 | #if DEBUG |
| 1779 | printk(OSST_DEB_MSG "%s:D: Reached space_over_filemarks_backwards %d %d\n", name, mt_op, mt_count); |
| 1780 | #endif |
| 1781 | if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) { |
| 1782 | #if DEBUG |
| 1783 | printk(OSST_DEB_MSG "%s:D: Couldn't get logical blk num in space_filemarks_bwd\n", name); |
| 1784 | #endif |
| 1785 | return -EIO; |
| 1786 | } |
| 1787 | if (STp->linux_media_version >= 4) { |
| 1788 | /* |
| 1789 | * direct lookup in header filemark list |
| 1790 | */ |
| 1791 | cnt = ntohl(STp->buffer->aux->filemark_cnt); |
| 1792 | if (STp->header_ok && |
| 1793 | STp->header_cache != NULL && |
| 1794 | (cnt - mt_count) >= 0 && |
| 1795 | (cnt - mt_count) < OS_FM_TAB_MAX && |
| 1796 | (cnt - mt_count) < STp->filemark_cnt && |
| 1797 | STp->header_cache->dat_fm_tab.fm_tab_ent[cnt-1] == STp->buffer->aux->last_mark_ppos) |
| 1798 | |
| 1799 | last_mark_ppos = ntohl(STp->header_cache->dat_fm_tab.fm_tab_ent[cnt - mt_count]); |
| 1800 | #if DEBUG |
| 1801 | if (STp->header_cache == NULL || (cnt - mt_count) < 0 || (cnt - mt_count) >= OS_FM_TAB_MAX) |
| 1802 | printk(OSST_DEB_MSG "%s:D: Filemark lookup fail due to %s\n", name, |
| 1803 | STp->header_cache == NULL?"lack of header cache":"count out of range"); |
| 1804 | else |
| 1805 | printk(OSST_DEB_MSG "%s:D: Filemark lookup: prev mark %d (%s), skip %d to %d\n", |
| 1806 | name, cnt, |
| 1807 | ((cnt == -1 && ntohl(STp->buffer->aux->last_mark_ppos) == -1) || |
| 1808 | (STp->header_cache->dat_fm_tab.fm_tab_ent[cnt-1] == |
| 1809 | STp->buffer->aux->last_mark_ppos))?"match":"error", |
| 1810 | mt_count, last_mark_ppos); |
| 1811 | #endif |
| 1812 | if (last_mark_ppos > 10 && last_mark_ppos < STp->eod_frame_ppos) { |
| 1813 | osst_position_tape_and_confirm(STp, aSRpnt, last_mark_ppos); |
| 1814 | if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) { |
| 1815 | #if DEBUG |
| 1816 | printk(OSST_DEB_MSG |
| 1817 | "%s:D: Couldn't get logical blk num in space_filemarks\n", name); |
| 1818 | #endif |
| 1819 | return (-EIO); |
| 1820 | } |
| 1821 | if (STp->buffer->aux->frame_type != OS_FRAME_TYPE_MARKER) { |
| 1822 | printk(KERN_WARNING "%s:W: Expected to find marker at ppos %d, not found\n", |
| 1823 | name, last_mark_ppos); |
| 1824 | return (-EIO); |
| 1825 | } |
| 1826 | goto found; |
| 1827 | } |
| 1828 | #if DEBUG |
| 1829 | printk(OSST_DEB_MSG "%s:D: Reverting to scan filemark backwards\n", name); |
| 1830 | #endif |
| 1831 | } |
| 1832 | cnt = 0; |
| 1833 | while (cnt != mt_count) { |
| 1834 | last_mark_ppos = ntohl(STp->buffer->aux->last_mark_ppos); |
| 1835 | if (last_mark_ppos == -1) |
| 1836 | return (-EIO); |
| 1837 | #if DEBUG |
| 1838 | printk(OSST_DEB_MSG "%s:D: Positioning to last mark at %d\n", name, last_mark_ppos); |
| 1839 | #endif |
| 1840 | osst_position_tape_and_confirm(STp, aSRpnt, last_mark_ppos); |
| 1841 | cnt++; |
| 1842 | if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) { |
| 1843 | #if DEBUG |
| 1844 | printk(OSST_DEB_MSG "%s:D: Couldn't get logical blk num in space_filemarks\n", name); |
| 1845 | #endif |
| 1846 | return (-EIO); |
| 1847 | } |
| 1848 | if (STp->buffer->aux->frame_type != OS_FRAME_TYPE_MARKER) { |
| 1849 | printk(KERN_WARNING "%s:W: Expected to find marker at ppos %d, not found\n", |
| 1850 | name, last_mark_ppos); |
| 1851 | return (-EIO); |
| 1852 | } |
| 1853 | } |
| 1854 | found: |
| 1855 | if (mt_op == MTBSFM) { |
| 1856 | STp->frame_seq_number++; |
| 1857 | STp->frame_in_buffer = 0; |
| 1858 | STp->buffer->buffer_bytes = 0; |
| 1859 | STp->buffer->read_pointer = 0; |
| 1860 | STp->logical_blk_num += ntohs(STp->buffer->aux->dat.dat_list[0].blk_cnt); |
| 1861 | } |
| 1862 | return 0; |
| 1863 | } |
| 1864 | |
| 1865 | /* |
| 1866 | * ADRL 1.1 compatible "slow" space filemarks fwd version |
| 1867 | * |
| 1868 | * Just scans for the filemark sequentially. |
| 1869 | */ |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 1870 | static int osst_space_over_filemarks_forward_slow(struct osst_tape * STp, struct osst_request ** aSRpnt, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1871 | int mt_op, int mt_count) |
| 1872 | { |
| 1873 | int cnt = 0; |
| 1874 | #if DEBUG |
| 1875 | char * name = tape_name(STp); |
| 1876 | |
| 1877 | printk(OSST_DEB_MSG "%s:D: Reached space_over_filemarks_forward_slow %d %d\n", name, mt_op, mt_count); |
| 1878 | #endif |
| 1879 | if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) { |
| 1880 | #if DEBUG |
| 1881 | printk(OSST_DEB_MSG "%s:D: Couldn't get logical blk num in space_filemarks_fwd\n", name); |
| 1882 | #endif |
| 1883 | return (-EIO); |
| 1884 | } |
| 1885 | while (1) { |
| 1886 | if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) { |
| 1887 | #if DEBUG |
| 1888 | printk(OSST_DEB_MSG "%s:D: Couldn't get logical blk num in space_filemarks\n", name); |
| 1889 | #endif |
| 1890 | return (-EIO); |
| 1891 | } |
| 1892 | if (STp->buffer->aux->frame_type == OS_FRAME_TYPE_MARKER) |
| 1893 | cnt++; |
| 1894 | if (STp->buffer->aux->frame_type == OS_FRAME_TYPE_EOD) { |
| 1895 | #if DEBUG |
| 1896 | printk(OSST_DEB_MSG "%s:D: space_fwd: EOD reached\n", name); |
| 1897 | #endif |
| 1898 | if (STp->first_frame_position > STp->eod_frame_ppos+1) { |
| 1899 | #if DEBUG |
| 1900 | printk(OSST_DEB_MSG "%s:D: EOD position corrected (%d=>%d)\n", |
| 1901 | name, STp->eod_frame_ppos, STp->first_frame_position-1); |
| 1902 | #endif |
| 1903 | STp->eod_frame_ppos = STp->first_frame_position-1; |
| 1904 | } |
| 1905 | return (-EIO); |
| 1906 | } |
| 1907 | if (cnt == mt_count) |
| 1908 | break; |
| 1909 | STp->frame_in_buffer = 0; |
| 1910 | } |
| 1911 | if (mt_op == MTFSF) { |
| 1912 | STp->frame_seq_number++; |
| 1913 | STp->frame_in_buffer = 0; |
| 1914 | STp->buffer->buffer_bytes = 0; |
| 1915 | STp->buffer->read_pointer = 0; |
| 1916 | STp->logical_blk_num += ntohs(STp->buffer->aux->dat.dat_list[0].blk_cnt); |
| 1917 | } |
| 1918 | return 0; |
| 1919 | } |
| 1920 | |
| 1921 | /* |
| 1922 | * Fast linux specific version of OnStream FSF |
| 1923 | */ |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 1924 | static int osst_space_over_filemarks_forward_fast(struct osst_tape * STp, struct osst_request ** aSRpnt, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1925 | int mt_op, int mt_count) |
| 1926 | { |
| 1927 | char * name = tape_name(STp); |
| 1928 | int cnt = 0, |
| 1929 | next_mark_ppos = -1; |
| 1930 | |
| 1931 | #if DEBUG |
| 1932 | printk(OSST_DEB_MSG "%s:D: Reached space_over_filemarks_forward_fast %d %d\n", name, mt_op, mt_count); |
| 1933 | #endif |
| 1934 | if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) { |
| 1935 | #if DEBUG |
| 1936 | printk(OSST_DEB_MSG "%s:D: Couldn't get logical blk num in space_filemarks_fwd\n", name); |
| 1937 | #endif |
| 1938 | return (-EIO); |
| 1939 | } |
| 1940 | |
| 1941 | if (STp->linux_media_version >= 4) { |
| 1942 | /* |
| 1943 | * direct lookup in header filemark list |
| 1944 | */ |
| 1945 | cnt = ntohl(STp->buffer->aux->filemark_cnt) - 1; |
| 1946 | if (STp->header_ok && |
| 1947 | STp->header_cache != NULL && |
| 1948 | (cnt + mt_count) < OS_FM_TAB_MAX && |
| 1949 | (cnt + mt_count) < STp->filemark_cnt && |
| 1950 | ((cnt == -1 && ntohl(STp->buffer->aux->last_mark_ppos) == -1) || |
| 1951 | (STp->header_cache->dat_fm_tab.fm_tab_ent[cnt] == STp->buffer->aux->last_mark_ppos))) |
| 1952 | |
| 1953 | next_mark_ppos = ntohl(STp->header_cache->dat_fm_tab.fm_tab_ent[cnt + mt_count]); |
| 1954 | #if DEBUG |
| 1955 | if (STp->header_cache == NULL || (cnt + mt_count) >= OS_FM_TAB_MAX) |
| 1956 | printk(OSST_DEB_MSG "%s:D: Filemark lookup fail due to %s\n", name, |
| 1957 | STp->header_cache == NULL?"lack of header cache":"count out of range"); |
| 1958 | else |
| 1959 | printk(OSST_DEB_MSG "%s:D: Filemark lookup: prev mark %d (%s), skip %d to %d\n", |
| 1960 | name, cnt, |
| 1961 | ((cnt == -1 && ntohl(STp->buffer->aux->last_mark_ppos) == -1) || |
| 1962 | (STp->header_cache->dat_fm_tab.fm_tab_ent[cnt] == |
| 1963 | STp->buffer->aux->last_mark_ppos))?"match":"error", |
| 1964 | mt_count, next_mark_ppos); |
| 1965 | #endif |
| 1966 | if (next_mark_ppos <= 10 || next_mark_ppos > STp->eod_frame_ppos) { |
| 1967 | #if DEBUG |
| 1968 | printk(OSST_DEB_MSG "%s:D: Reverting to slow filemark space\n", name); |
| 1969 | #endif |
| 1970 | return osst_space_over_filemarks_forward_slow(STp, aSRpnt, mt_op, mt_count); |
| 1971 | } else { |
| 1972 | osst_position_tape_and_confirm(STp, aSRpnt, next_mark_ppos); |
| 1973 | if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) { |
| 1974 | #if DEBUG |
| 1975 | printk(OSST_DEB_MSG "%s:D: Couldn't get logical blk num in space_filemarks\n", |
| 1976 | name); |
| 1977 | #endif |
| 1978 | return (-EIO); |
| 1979 | } |
| 1980 | if (STp->buffer->aux->frame_type != OS_FRAME_TYPE_MARKER) { |
| 1981 | printk(KERN_WARNING "%s:W: Expected to find marker at ppos %d, not found\n", |
| 1982 | name, next_mark_ppos); |
| 1983 | return (-EIO); |
| 1984 | } |
| 1985 | if (ntohl(STp->buffer->aux->filemark_cnt) != cnt + mt_count) { |
| 1986 | printk(KERN_WARNING "%s:W: Expected to find marker %d at ppos %d, not %d\n", |
| 1987 | name, cnt+mt_count, next_mark_ppos, |
| 1988 | ntohl(STp->buffer->aux->filemark_cnt)); |
| 1989 | return (-EIO); |
| 1990 | } |
| 1991 | } |
| 1992 | } else { |
| 1993 | /* |
| 1994 | * Find nearest (usually previous) marker, then jump from marker to marker |
| 1995 | */ |
| 1996 | while (1) { |
| 1997 | if (STp->buffer->aux->frame_type == OS_FRAME_TYPE_MARKER) |
| 1998 | break; |
| 1999 | if (STp->buffer->aux->frame_type == OS_FRAME_TYPE_EOD) { |
| 2000 | #if DEBUG |
| 2001 | printk(OSST_DEB_MSG "%s:D: space_fwd: EOD reached\n", name); |
| 2002 | #endif |
| 2003 | return (-EIO); |
| 2004 | } |
| 2005 | if (ntohl(STp->buffer->aux->filemark_cnt) == 0) { |
| 2006 | if (STp->first_mark_ppos == -1) { |
| 2007 | #if DEBUG |
| 2008 | printk(OSST_DEB_MSG "%s:D: Reverting to slow filemark space\n", name); |
| 2009 | #endif |
| 2010 | return osst_space_over_filemarks_forward_slow(STp, aSRpnt, mt_op, mt_count); |
| 2011 | } |
| 2012 | osst_position_tape_and_confirm(STp, aSRpnt, STp->first_mark_ppos); |
| 2013 | if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) { |
| 2014 | #if DEBUG |
| 2015 | printk(OSST_DEB_MSG |
| 2016 | "%s:D: Couldn't get logical blk num in space_filemarks_fwd_fast\n", |
| 2017 | name); |
| 2018 | #endif |
| 2019 | return (-EIO); |
| 2020 | } |
| 2021 | if (STp->buffer->aux->frame_type != OS_FRAME_TYPE_MARKER) { |
| 2022 | printk(KERN_WARNING "%s:W: Expected to find filemark at %d\n", |
| 2023 | name, STp->first_mark_ppos); |
| 2024 | return (-EIO); |
| 2025 | } |
| 2026 | } else { |
| 2027 | if (osst_space_over_filemarks_backward(STp, aSRpnt, MTBSF, 1) < 0) |
| 2028 | return (-EIO); |
| 2029 | mt_count++; |
| 2030 | } |
| 2031 | } |
| 2032 | cnt++; |
| 2033 | while (cnt != mt_count) { |
| 2034 | next_mark_ppos = ntohl(STp->buffer->aux->next_mark_ppos); |
| 2035 | if (!next_mark_ppos || next_mark_ppos > STp->eod_frame_ppos) { |
| 2036 | #if DEBUG |
| 2037 | printk(OSST_DEB_MSG "%s:D: Reverting to slow filemark space\n", name); |
| 2038 | #endif |
| 2039 | return osst_space_over_filemarks_forward_slow(STp, aSRpnt, mt_op, mt_count - cnt); |
| 2040 | } |
| 2041 | #if DEBUG |
| 2042 | else printk(OSST_DEB_MSG "%s:D: Positioning to next mark at %d\n", name, next_mark_ppos); |
| 2043 | #endif |
| 2044 | osst_position_tape_and_confirm(STp, aSRpnt, next_mark_ppos); |
| 2045 | cnt++; |
| 2046 | if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) { |
| 2047 | #if DEBUG |
| 2048 | printk(OSST_DEB_MSG "%s:D: Couldn't get logical blk num in space_filemarks\n", |
| 2049 | name); |
| 2050 | #endif |
| 2051 | return (-EIO); |
| 2052 | } |
| 2053 | if (STp->buffer->aux->frame_type != OS_FRAME_TYPE_MARKER) { |
| 2054 | printk(KERN_WARNING "%s:W: Expected to find marker at ppos %d, not found\n", |
| 2055 | name, next_mark_ppos); |
| 2056 | return (-EIO); |
| 2057 | } |
| 2058 | } |
| 2059 | } |
| 2060 | if (mt_op == MTFSF) { |
| 2061 | STp->frame_seq_number++; |
| 2062 | STp->frame_in_buffer = 0; |
| 2063 | STp->buffer->buffer_bytes = 0; |
| 2064 | STp->buffer->read_pointer = 0; |
| 2065 | STp->logical_blk_num += ntohs(STp->buffer->aux->dat.dat_list[0].blk_cnt); |
| 2066 | } |
| 2067 | return 0; |
| 2068 | } |
| 2069 | |
| 2070 | /* |
| 2071 | * In debug mode, we want to see as many errors as possible |
| 2072 | * to test the error recovery mechanism. |
| 2073 | */ |
| 2074 | #if DEBUG |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 2075 | static void osst_set_retries(struct osst_tape * STp, struct osst_request ** aSRpnt, int retries) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2076 | { |
| 2077 | unsigned char cmd[MAX_COMMAND_SIZE]; |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 2078 | struct osst_request * SRpnt = * aSRpnt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2079 | char * name = tape_name(STp); |
| 2080 | |
| 2081 | memset(cmd, 0, MAX_COMMAND_SIZE); |
| 2082 | cmd[0] = MODE_SELECT; |
| 2083 | cmd[1] = 0x10; |
| 2084 | cmd[4] = NUMBER_RETRIES_PAGE_LENGTH + MODE_HEADER_LENGTH; |
| 2085 | |
| 2086 | (STp->buffer)->b_data[0] = cmd[4] - 1; |
| 2087 | (STp->buffer)->b_data[1] = 0; /* Medium Type - ignoring */ |
| 2088 | (STp->buffer)->b_data[2] = 0; /* Reserved */ |
| 2089 | (STp->buffer)->b_data[3] = 0; /* Block Descriptor Length */ |
| 2090 | (STp->buffer)->b_data[MODE_HEADER_LENGTH + 0] = NUMBER_RETRIES_PAGE | (1 << 7); |
| 2091 | (STp->buffer)->b_data[MODE_HEADER_LENGTH + 1] = 2; |
| 2092 | (STp->buffer)->b_data[MODE_HEADER_LENGTH + 2] = 4; |
| 2093 | (STp->buffer)->b_data[MODE_HEADER_LENGTH + 3] = retries; |
| 2094 | |
| 2095 | if (debugging) |
| 2096 | printk(OSST_DEB_MSG "%s:D: Setting number of retries on OnStream tape to %d\n", name, retries); |
| 2097 | |
| 2098 | SRpnt = osst_do_scsi(SRpnt, STp, cmd, cmd[4], DMA_TO_DEVICE, STp->timeout, 0, 1); |
| 2099 | *aSRpnt = SRpnt; |
| 2100 | |
| 2101 | if ((STp->buffer)->syscall_result) |
| 2102 | printk (KERN_ERR "%s:D: Couldn't set retries to %d\n", name, retries); |
| 2103 | } |
| 2104 | #endif |
| 2105 | |
| 2106 | |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 2107 | static int osst_write_filemark(struct osst_tape * STp, struct osst_request ** aSRpnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2108 | { |
| 2109 | int result; |
| 2110 | int this_mark_ppos = STp->first_frame_position; |
| 2111 | int this_mark_lbn = STp->logical_blk_num; |
| 2112 | #if DEBUG |
| 2113 | char * name = tape_name(STp); |
| 2114 | #endif |
| 2115 | |
| 2116 | if (STp->raw) return 0; |
| 2117 | |
| 2118 | STp->write_type = OS_WRITE_NEW_MARK; |
| 2119 | #if DEBUG |
| 2120 | printk(OSST_DEB_MSG "%s:D: Writing Filemark %i at fppos %d (fseq %d, lblk %d)\n", |
| 2121 | name, STp->filemark_cnt, this_mark_ppos, STp->frame_seq_number, this_mark_lbn); |
| 2122 | #endif |
| 2123 | STp->dirty = 1; |
| 2124 | result = osst_flush_write_buffer(STp, aSRpnt); |
| 2125 | result |= osst_flush_drive_buffer(STp, aSRpnt); |
| 2126 | STp->last_mark_ppos = this_mark_ppos; |
| 2127 | STp->last_mark_lbn = this_mark_lbn; |
| 2128 | if (STp->header_cache != NULL && STp->filemark_cnt < OS_FM_TAB_MAX) |
| 2129 | STp->header_cache->dat_fm_tab.fm_tab_ent[STp->filemark_cnt] = htonl(this_mark_ppos); |
| 2130 | if (STp->filemark_cnt++ == 0) |
| 2131 | STp->first_mark_ppos = this_mark_ppos; |
| 2132 | return result; |
| 2133 | } |
| 2134 | |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 2135 | static int osst_write_eod(struct osst_tape * STp, struct osst_request ** aSRpnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2136 | { |
| 2137 | int result; |
| 2138 | #if DEBUG |
| 2139 | char * name = tape_name(STp); |
| 2140 | #endif |
| 2141 | |
| 2142 | if (STp->raw) return 0; |
| 2143 | |
| 2144 | STp->write_type = OS_WRITE_EOD; |
| 2145 | STp->eod_frame_ppos = STp->first_frame_position; |
| 2146 | #if DEBUG |
| 2147 | printk(OSST_DEB_MSG "%s:D: Writing EOD at fppos %d (fseq %d, lblk %d)\n", name, |
| 2148 | STp->eod_frame_ppos, STp->frame_seq_number, STp->logical_blk_num); |
| 2149 | #endif |
| 2150 | STp->dirty = 1; |
| 2151 | |
| 2152 | result = osst_flush_write_buffer(STp, aSRpnt); |
| 2153 | result |= osst_flush_drive_buffer(STp, aSRpnt); |
| 2154 | STp->eod_frame_lfa = --(STp->frame_seq_number); |
| 2155 | return result; |
| 2156 | } |
| 2157 | |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 2158 | static int osst_write_filler(struct osst_tape * STp, struct osst_request ** aSRpnt, int where, int count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2159 | { |
| 2160 | char * name = tape_name(STp); |
| 2161 | |
| 2162 | #if DEBUG |
| 2163 | printk(OSST_DEB_MSG "%s:D: Reached onstream write filler group %d\n", name, where); |
| 2164 | #endif |
| 2165 | osst_wait_ready(STp, aSRpnt, 60 * 5, 0); |
| 2166 | osst_set_frame_position(STp, aSRpnt, where, 0); |
| 2167 | STp->write_type = OS_WRITE_FILLER; |
| 2168 | while (count--) { |
| 2169 | memcpy(STp->buffer->b_data, "Filler", 6); |
| 2170 | STp->buffer->buffer_bytes = 6; |
| 2171 | STp->dirty = 1; |
| 2172 | if (osst_flush_write_buffer(STp, aSRpnt)) { |
| 2173 | printk(KERN_INFO "%s:I: Couldn't write filler frame\n", name); |
| 2174 | return (-EIO); |
| 2175 | } |
| 2176 | } |
| 2177 | #if DEBUG |
| 2178 | printk(OSST_DEB_MSG "%s:D: Exiting onstream write filler group\n", name); |
| 2179 | #endif |
| 2180 | return osst_flush_drive_buffer(STp, aSRpnt); |
| 2181 | } |
| 2182 | |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 2183 | static int __osst_write_header(struct osst_tape * STp, struct osst_request ** aSRpnt, int where, int count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2184 | { |
| 2185 | char * name = tape_name(STp); |
| 2186 | int result; |
| 2187 | |
| 2188 | #if DEBUG |
| 2189 | printk(OSST_DEB_MSG "%s:D: Reached onstream write header group %d\n", name, where); |
| 2190 | #endif |
| 2191 | osst_wait_ready(STp, aSRpnt, 60 * 5, 0); |
| 2192 | osst_set_frame_position(STp, aSRpnt, where, 0); |
| 2193 | STp->write_type = OS_WRITE_HEADER; |
| 2194 | while (count--) { |
| 2195 | osst_copy_to_buffer(STp->buffer, (unsigned char *)STp->header_cache); |
| 2196 | STp->buffer->buffer_bytes = sizeof(os_header_t); |
| 2197 | STp->dirty = 1; |
| 2198 | if (osst_flush_write_buffer(STp, aSRpnt)) { |
| 2199 | printk(KERN_INFO "%s:I: Couldn't write header frame\n", name); |
| 2200 | return (-EIO); |
| 2201 | } |
| 2202 | } |
| 2203 | result = osst_flush_drive_buffer(STp, aSRpnt); |
| 2204 | #if DEBUG |
| 2205 | printk(OSST_DEB_MSG "%s:D: Write onstream header group %s\n", name, result?"failed":"done"); |
| 2206 | #endif |
| 2207 | return result; |
| 2208 | } |
| 2209 | |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 2210 | static int osst_write_header(struct osst_tape * STp, struct osst_request ** aSRpnt, int locate_eod) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2211 | { |
| 2212 | os_header_t * header; |
| 2213 | int result; |
| 2214 | char * name = tape_name(STp); |
| 2215 | |
| 2216 | #if DEBUG |
| 2217 | printk(OSST_DEB_MSG "%s:D: Writing tape header\n", name); |
| 2218 | #endif |
| 2219 | if (STp->raw) return 0; |
| 2220 | |
| 2221 | if (STp->header_cache == NULL) { |
| 2222 | if ((STp->header_cache = (os_header_t *)vmalloc(sizeof(os_header_t))) == NULL) { |
| 2223 | printk(KERN_ERR "%s:E: Failed to allocate header cache\n", name); |
| 2224 | return (-ENOMEM); |
| 2225 | } |
| 2226 | memset(STp->header_cache, 0, sizeof(os_header_t)); |
| 2227 | #if DEBUG |
| 2228 | printk(OSST_DEB_MSG "%s:D: Allocated and cleared memory for header cache\n", name); |
| 2229 | #endif |
| 2230 | } |
| 2231 | if (STp->header_ok) STp->update_frame_cntr++; |
| 2232 | else STp->update_frame_cntr = 0; |
| 2233 | |
| 2234 | header = STp->header_cache; |
| 2235 | strcpy(header->ident_str, "ADR_SEQ"); |
| 2236 | header->major_rev = 1; |
| 2237 | header->minor_rev = 4; |
| 2238 | header->ext_trk_tb_off = htons(17192); |
| 2239 | header->pt_par_num = 1; |
| 2240 | header->partition[0].partition_num = OS_DATA_PARTITION; |
| 2241 | header->partition[0].par_desc_ver = OS_PARTITION_VERSION; |
| 2242 | header->partition[0].wrt_pass_cntr = htons(STp->wrt_pass_cntr); |
| 2243 | header->partition[0].first_frame_ppos = htonl(STp->first_data_ppos); |
| 2244 | header->partition[0].last_frame_ppos = htonl(STp->capacity); |
| 2245 | header->partition[0].eod_frame_ppos = htonl(STp->eod_frame_ppos); |
| 2246 | header->cfg_col_width = htonl(20); |
| 2247 | header->dat_col_width = htonl(1500); |
| 2248 | header->qfa_col_width = htonl(0); |
| 2249 | header->ext_track_tb.nr_stream_part = 1; |
| 2250 | header->ext_track_tb.et_ent_sz = 32; |
| 2251 | header->ext_track_tb.dat_ext_trk_ey.et_part_num = 0; |
| 2252 | header->ext_track_tb.dat_ext_trk_ey.fmt = 1; |
| 2253 | header->ext_track_tb.dat_ext_trk_ey.fm_tab_off = htons(17736); |
| 2254 | header->ext_track_tb.dat_ext_trk_ey.last_hlb_hi = 0; |
| 2255 | header->ext_track_tb.dat_ext_trk_ey.last_hlb = htonl(STp->eod_frame_lfa); |
| 2256 | header->ext_track_tb.dat_ext_trk_ey.last_pp = htonl(STp->eod_frame_ppos); |
| 2257 | header->dat_fm_tab.fm_part_num = 0; |
| 2258 | header->dat_fm_tab.fm_tab_ent_sz = 4; |
| 2259 | header->dat_fm_tab.fm_tab_ent_cnt = htons(STp->filemark_cnt<OS_FM_TAB_MAX? |
| 2260 | STp->filemark_cnt:OS_FM_TAB_MAX); |
| 2261 | |
| 2262 | result = __osst_write_header(STp, aSRpnt, 0xbae, 5); |
| 2263 | if (STp->update_frame_cntr == 0) |
| 2264 | osst_write_filler(STp, aSRpnt, 0xbb3, 5); |
| 2265 | result &= __osst_write_header(STp, aSRpnt, 5, 5); |
| 2266 | |
| 2267 | if (locate_eod) { |
| 2268 | #if DEBUG |
| 2269 | printk(OSST_DEB_MSG "%s:D: Locating back to eod frame addr %d\n", name, STp->eod_frame_ppos); |
| 2270 | #endif |
| 2271 | osst_set_frame_position(STp, aSRpnt, STp->eod_frame_ppos, 0); |
| 2272 | } |
| 2273 | if (result) |
| 2274 | printk(KERN_ERR "%s:E: Write header failed\n", name); |
| 2275 | else { |
| 2276 | memcpy(STp->application_sig, "LIN4", 4); |
| 2277 | STp->linux_media = 1; |
| 2278 | STp->linux_media_version = 4; |
| 2279 | STp->header_ok = 1; |
| 2280 | } |
| 2281 | return result; |
| 2282 | } |
| 2283 | |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 2284 | static int osst_reset_header(struct osst_tape * STp, struct osst_request ** aSRpnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2285 | { |
| 2286 | if (STp->header_cache != NULL) |
| 2287 | memset(STp->header_cache, 0, sizeof(os_header_t)); |
| 2288 | |
| 2289 | STp->logical_blk_num = STp->frame_seq_number = 0; |
| 2290 | STp->frame_in_buffer = 0; |
| 2291 | STp->eod_frame_ppos = STp->first_data_ppos = 0x0000000A; |
| 2292 | STp->filemark_cnt = 0; |
| 2293 | STp->first_mark_ppos = STp->last_mark_ppos = STp->last_mark_lbn = -1; |
| 2294 | return osst_write_header(STp, aSRpnt, 1); |
| 2295 | } |
| 2296 | |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 2297 | static int __osst_analyze_headers(struct osst_tape * STp, struct osst_request ** aSRpnt, int ppos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2298 | { |
| 2299 | char * name = tape_name(STp); |
| 2300 | os_header_t * header; |
| 2301 | os_aux_t * aux; |
| 2302 | char id_string[8]; |
| 2303 | int linux_media_version, |
| 2304 | update_frame_cntr; |
| 2305 | |
| 2306 | if (STp->raw) |
| 2307 | return 1; |
| 2308 | |
| 2309 | if (ppos == 5 || ppos == 0xbae || STp->buffer->syscall_result) { |
| 2310 | if (osst_set_frame_position(STp, aSRpnt, ppos, 0)) |
| 2311 | printk(KERN_WARNING "%s:W: Couldn't position tape\n", name); |
| 2312 | osst_wait_ready(STp, aSRpnt, 60 * 15, 0); |
| 2313 | if (osst_initiate_read (STp, aSRpnt)) { |
| 2314 | printk(KERN_WARNING "%s:W: Couldn't initiate read\n", name); |
| 2315 | return 0; |
| 2316 | } |
| 2317 | } |
| 2318 | if (osst_read_frame(STp, aSRpnt, 180)) { |
| 2319 | #if DEBUG |
| 2320 | printk(OSST_DEB_MSG "%s:D: Couldn't read header frame\n", name); |
| 2321 | #endif |
| 2322 | return 0; |
| 2323 | } |
| 2324 | header = (os_header_t *) STp->buffer->b_data; /* warning: only first segment addressable */ |
| 2325 | aux = STp->buffer->aux; |
| 2326 | if (aux->frame_type != OS_FRAME_TYPE_HEADER) { |
| 2327 | #if DEBUG |
| 2328 | printk(OSST_DEB_MSG "%s:D: Skipping non-header frame (%d)\n", name, ppos); |
| 2329 | #endif |
| 2330 | return 0; |
| 2331 | } |
| 2332 | if (ntohl(aux->frame_seq_num) != 0 || |
| 2333 | ntohl(aux->logical_blk_num) != 0 || |
| 2334 | aux->partition.partition_num != OS_CONFIG_PARTITION || |
| 2335 | ntohl(aux->partition.first_frame_ppos) != 0 || |
| 2336 | ntohl(aux->partition.last_frame_ppos) != 0xbb7 ) { |
| 2337 | #if DEBUG |
| 2338 | printk(OSST_DEB_MSG "%s:D: Invalid header frame (%d,%d,%d,%d,%d)\n", name, |
| 2339 | ntohl(aux->frame_seq_num), ntohl(aux->logical_blk_num), |
| 2340 | aux->partition.partition_num, ntohl(aux->partition.first_frame_ppos), |
| 2341 | ntohl(aux->partition.last_frame_ppos)); |
| 2342 | #endif |
| 2343 | return 0; |
| 2344 | } |
| 2345 | if (strncmp(header->ident_str, "ADR_SEQ", 7) != 0 && |
| 2346 | strncmp(header->ident_str, "ADR-SEQ", 7) != 0) { |
| 2347 | strlcpy(id_string, header->ident_str, 8); |
| 2348 | #if DEBUG |
| 2349 | printk(OSST_DEB_MSG "%s:D: Invalid header identification string %s\n", name, id_string); |
| 2350 | #endif |
| 2351 | return 0; |
| 2352 | } |
| 2353 | update_frame_cntr = ntohl(aux->update_frame_cntr); |
| 2354 | if (update_frame_cntr < STp->update_frame_cntr) { |
| 2355 | #if DEBUG |
| 2356 | printk(OSST_DEB_MSG "%s:D: Skipping frame %d with update_frame_counter %d<%d\n", |
| 2357 | name, ppos, update_frame_cntr, STp->update_frame_cntr); |
| 2358 | #endif |
| 2359 | return 0; |
| 2360 | } |
| 2361 | if (header->major_rev != 1 || header->minor_rev != 4 ) { |
| 2362 | #if DEBUG |
| 2363 | printk(OSST_DEB_MSG "%s:D: %s revision %d.%d detected (1.4 supported)\n", |
| 2364 | name, (header->major_rev != 1 || header->minor_rev < 2 || |
| 2365 | header->minor_rev > 4 )? "Invalid" : "Warning:", |
| 2366 | header->major_rev, header->minor_rev); |
| 2367 | #endif |
| 2368 | if (header->major_rev != 1 || header->minor_rev < 2 || header->minor_rev > 4) |
| 2369 | return 0; |
| 2370 | } |
| 2371 | #if DEBUG |
| 2372 | if (header->pt_par_num != 1) |
| 2373 | printk(KERN_INFO "%s:W: %d partitions defined, only one supported\n", |
| 2374 | name, header->pt_par_num); |
| 2375 | #endif |
| 2376 | memcpy(id_string, aux->application_sig, 4); |
| 2377 | id_string[4] = 0; |
| 2378 | if (memcmp(id_string, "LIN", 3) == 0) { |
| 2379 | STp->linux_media = 1; |
| 2380 | linux_media_version = id_string[3] - '0'; |
| 2381 | if (linux_media_version != 4) |
| 2382 | printk(KERN_INFO "%s:I: Linux media version %d detected (current 4)\n", |
| 2383 | name, linux_media_version); |
| 2384 | } else { |
| 2385 | printk(KERN_WARNING "%s:W: Non Linux media detected (%s)\n", name, id_string); |
| 2386 | return 0; |
| 2387 | } |
| 2388 | if (linux_media_version < STp->linux_media_version) { |
| 2389 | #if DEBUG |
| 2390 | printk(OSST_DEB_MSG "%s:D: Skipping frame %d with linux_media_version %d\n", |
| 2391 | name, ppos, linux_media_version); |
| 2392 | #endif |
| 2393 | return 0; |
| 2394 | } |
| 2395 | if (linux_media_version > STp->linux_media_version) { |
| 2396 | #if DEBUG |
| 2397 | printk(OSST_DEB_MSG "%s:D: Frame %d sets linux_media_version to %d\n", |
| 2398 | name, ppos, linux_media_version); |
| 2399 | #endif |
| 2400 | memcpy(STp->application_sig, id_string, 5); |
| 2401 | STp->linux_media_version = linux_media_version; |
| 2402 | STp->update_frame_cntr = -1; |
| 2403 | } |
| 2404 | if (update_frame_cntr > STp->update_frame_cntr) { |
| 2405 | #if DEBUG |
| 2406 | printk(OSST_DEB_MSG "%s:D: Frame %d sets update_frame_counter to %d\n", |
| 2407 | name, ppos, update_frame_cntr); |
| 2408 | #endif |
| 2409 | if (STp->header_cache == NULL) { |
| 2410 | if ((STp->header_cache = (os_header_t *)vmalloc(sizeof(os_header_t))) == NULL) { |
| 2411 | printk(KERN_ERR "%s:E: Failed to allocate header cache\n", name); |
| 2412 | return 0; |
| 2413 | } |
| 2414 | #if DEBUG |
| 2415 | printk(OSST_DEB_MSG "%s:D: Allocated memory for header cache\n", name); |
| 2416 | #endif |
| 2417 | } |
| 2418 | osst_copy_from_buffer(STp->buffer, (unsigned char *)STp->header_cache); |
| 2419 | header = STp->header_cache; /* further accesses from cached (full) copy */ |
| 2420 | |
| 2421 | STp->wrt_pass_cntr = ntohs(header->partition[0].wrt_pass_cntr); |
| 2422 | STp->first_data_ppos = ntohl(header->partition[0].first_frame_ppos); |
| 2423 | STp->eod_frame_ppos = ntohl(header->partition[0].eod_frame_ppos); |
| 2424 | STp->eod_frame_lfa = ntohl(header->ext_track_tb.dat_ext_trk_ey.last_hlb); |
| 2425 | STp->filemark_cnt = ntohl(aux->filemark_cnt); |
| 2426 | STp->first_mark_ppos = ntohl(aux->next_mark_ppos); |
| 2427 | STp->last_mark_ppos = ntohl(aux->last_mark_ppos); |
| 2428 | STp->last_mark_lbn = ntohl(aux->last_mark_lbn); |
| 2429 | STp->update_frame_cntr = update_frame_cntr; |
| 2430 | #if DEBUG |
| 2431 | printk(OSST_DEB_MSG "%s:D: Detected write pass %d, update frame counter %d, filemark counter %d\n", |
| 2432 | name, STp->wrt_pass_cntr, STp->update_frame_cntr, STp->filemark_cnt); |
| 2433 | printk(OSST_DEB_MSG "%s:D: first data frame on tape = %d, last = %d, eod frame = %d\n", name, |
| 2434 | STp->first_data_ppos, |
| 2435 | ntohl(header->partition[0].last_frame_ppos), |
| 2436 | ntohl(header->partition[0].eod_frame_ppos)); |
| 2437 | printk(OSST_DEB_MSG "%s:D: first mark on tape = %d, last = %d, eod frame = %d\n", |
| 2438 | name, STp->first_mark_ppos, STp->last_mark_ppos, STp->eod_frame_ppos); |
| 2439 | #endif |
| 2440 | if (header->minor_rev < 4 && STp->linux_media_version == 4) { |
| 2441 | #if DEBUG |
| 2442 | printk(OSST_DEB_MSG "%s:D: Moving filemark list to ADR 1.4 location\n", name); |
| 2443 | #endif |
| 2444 | memcpy((void *)header->dat_fm_tab.fm_tab_ent, |
| 2445 | (void *)header->old_filemark_list, sizeof(header->dat_fm_tab.fm_tab_ent)); |
| 2446 | memset((void *)header->old_filemark_list, 0, sizeof(header->old_filemark_list)); |
| 2447 | } |
| 2448 | if (header->minor_rev == 4 && |
| 2449 | (header->ext_trk_tb_off != htons(17192) || |
| 2450 | header->partition[0].partition_num != OS_DATA_PARTITION || |
| 2451 | header->partition[0].par_desc_ver != OS_PARTITION_VERSION || |
| 2452 | header->partition[0].last_frame_ppos != htonl(STp->capacity) || |
| 2453 | header->cfg_col_width != htonl(20) || |
| 2454 | header->dat_col_width != htonl(1500) || |
| 2455 | header->qfa_col_width != htonl(0) || |
| 2456 | header->ext_track_tb.nr_stream_part != 1 || |
| 2457 | header->ext_track_tb.et_ent_sz != 32 || |
| 2458 | header->ext_track_tb.dat_ext_trk_ey.et_part_num != OS_DATA_PARTITION || |
| 2459 | header->ext_track_tb.dat_ext_trk_ey.fmt != 1 || |
| 2460 | header->ext_track_tb.dat_ext_trk_ey.fm_tab_off != htons(17736) || |
| 2461 | header->ext_track_tb.dat_ext_trk_ey.last_hlb_hi != 0 || |
| 2462 | header->ext_track_tb.dat_ext_trk_ey.last_pp != htonl(STp->eod_frame_ppos) || |
| 2463 | header->dat_fm_tab.fm_part_num != OS_DATA_PARTITION || |
| 2464 | header->dat_fm_tab.fm_tab_ent_sz != 4 || |
| 2465 | header->dat_fm_tab.fm_tab_ent_cnt != |
| 2466 | htons(STp->filemark_cnt<OS_FM_TAB_MAX?STp->filemark_cnt:OS_FM_TAB_MAX))) |
| 2467 | printk(KERN_WARNING "%s:W: Failed consistency check ADR 1.4 format\n", name); |
| 2468 | |
| 2469 | } |
| 2470 | |
| 2471 | return 1; |
| 2472 | } |
| 2473 | |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 2474 | static int osst_analyze_headers(struct osst_tape * STp, struct osst_request ** aSRpnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2475 | { |
| 2476 | int position, ppos; |
| 2477 | int first, last; |
| 2478 | int valid = 0; |
| 2479 | char * name = tape_name(STp); |
| 2480 | |
| 2481 | position = osst_get_frame_position(STp, aSRpnt); |
| 2482 | |
| 2483 | if (STp->raw) { |
| 2484 | STp->header_ok = STp->linux_media = 1; |
| 2485 | STp->linux_media_version = 0; |
| 2486 | return 1; |
| 2487 | } |
| 2488 | STp->header_ok = STp->linux_media = STp->linux_media_version = 0; |
| 2489 | STp->wrt_pass_cntr = STp->update_frame_cntr = -1; |
| 2490 | STp->eod_frame_ppos = STp->first_data_ppos = -1; |
| 2491 | STp->first_mark_ppos = STp->last_mark_ppos = STp->last_mark_lbn = -1; |
| 2492 | #if DEBUG |
| 2493 | printk(OSST_DEB_MSG "%s:D: Reading header\n", name); |
| 2494 | #endif |
| 2495 | |
| 2496 | /* optimization for speed - if we are positioned at ppos 10, read second group first */ |
| 2497 | /* TODO try the ADR 1.1 locations for the second group if we have no valid one yet... */ |
| 2498 | |
| 2499 | first = position==10?0xbae: 5; |
| 2500 | last = position==10?0xbb3:10; |
| 2501 | |
| 2502 | for (ppos = first; ppos < last; ppos++) |
| 2503 | if (__osst_analyze_headers(STp, aSRpnt, ppos)) |
| 2504 | valid = 1; |
| 2505 | |
| 2506 | first = position==10? 5:0xbae; |
| 2507 | last = position==10?10:0xbb3; |
| 2508 | |
| 2509 | for (ppos = first; ppos < last; ppos++) |
| 2510 | if (__osst_analyze_headers(STp, aSRpnt, ppos)) |
| 2511 | valid = 1; |
| 2512 | |
| 2513 | if (!valid) { |
| 2514 | printk(KERN_ERR "%s:E: Failed to find valid ADRL header, new media?\n", name); |
| 2515 | STp->eod_frame_ppos = STp->first_data_ppos = 0; |
| 2516 | osst_set_frame_position(STp, aSRpnt, 10, 0); |
| 2517 | return 0; |
| 2518 | } |
| 2519 | if (position <= STp->first_data_ppos) { |
| 2520 | position = STp->first_data_ppos; |
| 2521 | STp->ps[0].drv_file = STp->ps[0].drv_block = STp->frame_seq_number = STp->logical_blk_num = 0; |
| 2522 | } |
| 2523 | osst_set_frame_position(STp, aSRpnt, position, 0); |
| 2524 | STp->header_ok = 1; |
| 2525 | |
| 2526 | return 1; |
| 2527 | } |
| 2528 | |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 2529 | static int osst_verify_position(struct osst_tape * STp, struct osst_request ** aSRpnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2530 | { |
| 2531 | int frame_position = STp->first_frame_position; |
| 2532 | int frame_seq_numbr = STp->frame_seq_number; |
| 2533 | int logical_blk_num = STp->logical_blk_num; |
| 2534 | int halfway_frame = STp->frame_in_buffer; |
| 2535 | int read_pointer = STp->buffer->read_pointer; |
| 2536 | int prev_mark_ppos = -1; |
| 2537 | int actual_mark_ppos, i, n; |
| 2538 | #if DEBUG |
| 2539 | char * name = tape_name(STp); |
| 2540 | |
| 2541 | printk(OSST_DEB_MSG "%s:D: Verify that the tape is really the one we think before writing\n", name); |
| 2542 | #endif |
| 2543 | osst_set_frame_position(STp, aSRpnt, frame_position - 1, 0); |
| 2544 | if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) { |
| 2545 | #if DEBUG |
| 2546 | printk(OSST_DEB_MSG "%s:D: Couldn't get logical blk num in verify_position\n", name); |
| 2547 | #endif |
| 2548 | return (-EIO); |
| 2549 | } |
| 2550 | if (STp->linux_media_version >= 4) { |
| 2551 | for (i=0; i<STp->filemark_cnt; i++) |
| 2552 | if ((n=ntohl(STp->header_cache->dat_fm_tab.fm_tab_ent[i])) < frame_position) |
| 2553 | prev_mark_ppos = n; |
| 2554 | } else |
| 2555 | prev_mark_ppos = frame_position - 1; /* usually - we don't really know */ |
| 2556 | actual_mark_ppos = STp->buffer->aux->frame_type == OS_FRAME_TYPE_MARKER ? |
| 2557 | frame_position - 1 : ntohl(STp->buffer->aux->last_mark_ppos); |
| 2558 | if (frame_position != STp->first_frame_position || |
| 2559 | frame_seq_numbr != STp->frame_seq_number + (halfway_frame?0:1) || |
| 2560 | prev_mark_ppos != actual_mark_ppos ) { |
| 2561 | #if DEBUG |
| 2562 | printk(OSST_DEB_MSG "%s:D: Block mismatch: fppos %d-%d, fseq %d-%d, mark %d-%d\n", name, |
| 2563 | STp->first_frame_position, frame_position, |
| 2564 | STp->frame_seq_number + (halfway_frame?0:1), |
| 2565 | frame_seq_numbr, actual_mark_ppos, prev_mark_ppos); |
| 2566 | #endif |
| 2567 | return (-EIO); |
| 2568 | } |
| 2569 | if (halfway_frame) { |
| 2570 | /* prepare buffer for append and rewrite on top of original */ |
| 2571 | osst_set_frame_position(STp, aSRpnt, frame_position - 1, 0); |
| 2572 | STp->buffer->buffer_bytes = read_pointer; |
| 2573 | STp->ps[STp->partition].rw = ST_WRITING; |
| 2574 | STp->dirty = 1; |
| 2575 | } |
| 2576 | STp->frame_in_buffer = halfway_frame; |
| 2577 | STp->frame_seq_number = frame_seq_numbr; |
| 2578 | STp->logical_blk_num = logical_blk_num; |
| 2579 | return 0; |
| 2580 | } |
| 2581 | |
| 2582 | /* Acc. to OnStream, the vers. numbering is the following: |
| 2583 | * X.XX for released versions (X=digit), |
| 2584 | * XXXY for unreleased versions (Y=letter) |
| 2585 | * Ordering 1.05 < 106A < 106B < ... < 106a < ... < 1.06 |
| 2586 | * This fn makes monoton numbers out of this scheme ... |
| 2587 | */ |
| 2588 | static unsigned int osst_parse_firmware_rev (const char * str) |
| 2589 | { |
| 2590 | if (str[1] == '.') { |
| 2591 | return (str[0]-'0')*10000 |
| 2592 | +(str[2]-'0')*1000 |
| 2593 | +(str[3]-'0')*100; |
| 2594 | } else { |
| 2595 | return (str[0]-'0')*10000 |
| 2596 | +(str[1]-'0')*1000 |
| 2597 | +(str[2]-'0')*100 - 100 |
| 2598 | +(str[3]-'@'); |
| 2599 | } |
| 2600 | } |
| 2601 | |
| 2602 | /* |
| 2603 | * Configure the OnStream SCII tape drive for default operation |
| 2604 | */ |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 2605 | static int osst_configure_onstream(struct osst_tape *STp, struct osst_request ** aSRpnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2606 | { |
| 2607 | unsigned char cmd[MAX_COMMAND_SIZE]; |
| 2608 | char * name = tape_name(STp); |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 2609 | struct osst_request * SRpnt = * aSRpnt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2610 | osst_mode_parameter_header_t * header; |
| 2611 | osst_block_size_page_t * bs; |
| 2612 | osst_capabilities_page_t * cp; |
| 2613 | osst_tape_paramtr_page_t * prm; |
| 2614 | int drive_buffer_size; |
| 2615 | |
| 2616 | if (STp->ready != ST_READY) { |
| 2617 | #if DEBUG |
| 2618 | printk(OSST_DEB_MSG "%s:D: Not Ready\n", name); |
| 2619 | #endif |
| 2620 | return (-EIO); |
| 2621 | } |
| 2622 | |
| 2623 | if (STp->os_fw_rev < 10600) { |
| 2624 | printk(KERN_INFO "%s:I: Old OnStream firmware revision detected (%s),\n", name, STp->device->rev); |
| 2625 | printk(KERN_INFO "%s:I: an upgrade to version 1.06 or above is recommended\n", name); |
| 2626 | } |
| 2627 | |
| 2628 | /* |
| 2629 | * Configure 32.5KB (data+aux) frame size. |
| 2630 | * Get the current frame size from the block size mode page |
| 2631 | */ |
| 2632 | memset(cmd, 0, MAX_COMMAND_SIZE); |
| 2633 | cmd[0] = MODE_SENSE; |
| 2634 | cmd[1] = 8; |
| 2635 | cmd[2] = BLOCK_SIZE_PAGE; |
| 2636 | cmd[4] = BLOCK_SIZE_PAGE_LENGTH + MODE_HEADER_LENGTH; |
| 2637 | |
| 2638 | SRpnt = osst_do_scsi(SRpnt, STp, cmd, cmd[4], DMA_FROM_DEVICE, STp->timeout, 0, 1); |
| 2639 | if (SRpnt == NULL) { |
| 2640 | #if DEBUG |
| 2641 | printk(OSST_DEB_MSG "osst :D: Busy\n"); |
| 2642 | #endif |
| 2643 | return (-EBUSY); |
| 2644 | } |
| 2645 | *aSRpnt = SRpnt; |
| 2646 | if ((STp->buffer)->syscall_result != 0) { |
| 2647 | printk (KERN_ERR "%s:E: Can't get tape block size mode page\n", name); |
| 2648 | return (-EIO); |
| 2649 | } |
| 2650 | |
| 2651 | header = (osst_mode_parameter_header_t *) (STp->buffer)->b_data; |
| 2652 | bs = (osst_block_size_page_t *) ((STp->buffer)->b_data + sizeof(osst_mode_parameter_header_t) + header->bdl); |
| 2653 | |
| 2654 | #if DEBUG |
| 2655 | printk(OSST_DEB_MSG "%s:D: 32KB play back: %s\n", name, bs->play32 ? "Yes" : "No"); |
| 2656 | printk(OSST_DEB_MSG "%s:D: 32.5KB play back: %s\n", name, bs->play32_5 ? "Yes" : "No"); |
| 2657 | printk(OSST_DEB_MSG "%s:D: 32KB record: %s\n", name, bs->record32 ? "Yes" : "No"); |
| 2658 | printk(OSST_DEB_MSG "%s:D: 32.5KB record: %s\n", name, bs->record32_5 ? "Yes" : "No"); |
| 2659 | #endif |
| 2660 | |
| 2661 | /* |
| 2662 | * Configure default auto columns mode, 32.5KB transfer mode |
| 2663 | */ |
| 2664 | bs->one = 1; |
| 2665 | bs->play32 = 0; |
| 2666 | bs->play32_5 = 1; |
| 2667 | bs->record32 = 0; |
| 2668 | bs->record32_5 = 1; |
| 2669 | |
| 2670 | memset(cmd, 0, MAX_COMMAND_SIZE); |
| 2671 | cmd[0] = MODE_SELECT; |
| 2672 | cmd[1] = 0x10; |
| 2673 | cmd[4] = BLOCK_SIZE_PAGE_LENGTH + MODE_HEADER_LENGTH; |
| 2674 | |
| 2675 | SRpnt = osst_do_scsi(SRpnt, STp, cmd, cmd[4], DMA_TO_DEVICE, STp->timeout, 0, 1); |
| 2676 | *aSRpnt = SRpnt; |
| 2677 | if ((STp->buffer)->syscall_result != 0) { |
| 2678 | printk (KERN_ERR "%s:E: Couldn't set tape block size mode page\n", name); |
| 2679 | return (-EIO); |
| 2680 | } |
| 2681 | |
| 2682 | #if DEBUG |
| 2683 | printk(KERN_INFO "%s:D: Drive Block Size changed to 32.5K\n", name); |
| 2684 | /* |
| 2685 | * In debug mode, we want to see as many errors as possible |
| 2686 | * to test the error recovery mechanism. |
| 2687 | */ |
| 2688 | osst_set_retries(STp, aSRpnt, 0); |
| 2689 | SRpnt = * aSRpnt; |
| 2690 | #endif |
| 2691 | |
| 2692 | /* |
| 2693 | * Set vendor name to 'LIN4' for "Linux support version 4". |
| 2694 | */ |
| 2695 | |
| 2696 | memset(cmd, 0, MAX_COMMAND_SIZE); |
| 2697 | cmd[0] = MODE_SELECT; |
| 2698 | cmd[1] = 0x10; |
| 2699 | cmd[4] = VENDOR_IDENT_PAGE_LENGTH + MODE_HEADER_LENGTH; |
| 2700 | |
| 2701 | header->mode_data_length = VENDOR_IDENT_PAGE_LENGTH + MODE_HEADER_LENGTH - 1; |
| 2702 | header->medium_type = 0; /* Medium Type - ignoring */ |
| 2703 | header->dsp = 0; /* Reserved */ |
| 2704 | header->bdl = 0; /* Block Descriptor Length */ |
| 2705 | |
| 2706 | (STp->buffer)->b_data[MODE_HEADER_LENGTH + 0] = VENDOR_IDENT_PAGE | (1 << 7); |
| 2707 | (STp->buffer)->b_data[MODE_HEADER_LENGTH + 1] = 6; |
| 2708 | (STp->buffer)->b_data[MODE_HEADER_LENGTH + 2] = 'L'; |
| 2709 | (STp->buffer)->b_data[MODE_HEADER_LENGTH + 3] = 'I'; |
| 2710 | (STp->buffer)->b_data[MODE_HEADER_LENGTH + 4] = 'N'; |
| 2711 | (STp->buffer)->b_data[MODE_HEADER_LENGTH + 5] = '4'; |
| 2712 | (STp->buffer)->b_data[MODE_HEADER_LENGTH + 6] = 0; |
| 2713 | (STp->buffer)->b_data[MODE_HEADER_LENGTH + 7] = 0; |
| 2714 | |
| 2715 | SRpnt = osst_do_scsi(SRpnt, STp, cmd, cmd[4], DMA_TO_DEVICE, STp->timeout, 0, 1); |
| 2716 | *aSRpnt = SRpnt; |
| 2717 | |
| 2718 | if ((STp->buffer)->syscall_result != 0) { |
| 2719 | printk (KERN_ERR "%s:E: Couldn't set vendor name to %s\n", name, |
| 2720 | (char *) ((STp->buffer)->b_data + MODE_HEADER_LENGTH + 2)); |
| 2721 | return (-EIO); |
| 2722 | } |
| 2723 | |
| 2724 | memset(cmd, 0, MAX_COMMAND_SIZE); |
| 2725 | cmd[0] = MODE_SENSE; |
| 2726 | cmd[1] = 8; |
| 2727 | cmd[2] = CAPABILITIES_PAGE; |
| 2728 | cmd[4] = CAPABILITIES_PAGE_LENGTH + MODE_HEADER_LENGTH; |
| 2729 | |
| 2730 | SRpnt = osst_do_scsi(SRpnt, STp, cmd, cmd[4], DMA_FROM_DEVICE, STp->timeout, 0, 1); |
| 2731 | *aSRpnt = SRpnt; |
| 2732 | |
| 2733 | if ((STp->buffer)->syscall_result != 0) { |
| 2734 | printk (KERN_ERR "%s:E: Can't get capabilities page\n", name); |
| 2735 | return (-EIO); |
| 2736 | } |
| 2737 | |
| 2738 | header = (osst_mode_parameter_header_t *) (STp->buffer)->b_data; |
| 2739 | cp = (osst_capabilities_page_t *) ((STp->buffer)->b_data + |
| 2740 | sizeof(osst_mode_parameter_header_t) + header->bdl); |
| 2741 | |
| 2742 | drive_buffer_size = ntohs(cp->buffer_size) / 2; |
| 2743 | |
| 2744 | memset(cmd, 0, MAX_COMMAND_SIZE); |
| 2745 | cmd[0] = MODE_SENSE; |
| 2746 | cmd[1] = 8; |
| 2747 | cmd[2] = TAPE_PARAMTR_PAGE; |
| 2748 | cmd[4] = TAPE_PARAMTR_PAGE_LENGTH + MODE_HEADER_LENGTH; |
| 2749 | |
| 2750 | SRpnt = osst_do_scsi(SRpnt, STp, cmd, cmd[4], DMA_FROM_DEVICE, STp->timeout, 0, 1); |
| 2751 | *aSRpnt = SRpnt; |
| 2752 | |
| 2753 | if ((STp->buffer)->syscall_result != 0) { |
| 2754 | printk (KERN_ERR "%s:E: Can't get tape parameter page\n", name); |
| 2755 | return (-EIO); |
| 2756 | } |
| 2757 | |
| 2758 | header = (osst_mode_parameter_header_t *) (STp->buffer)->b_data; |
| 2759 | prm = (osst_tape_paramtr_page_t *) ((STp->buffer)->b_data + |
| 2760 | sizeof(osst_mode_parameter_header_t) + header->bdl); |
| 2761 | |
| 2762 | STp->density = prm->density; |
| 2763 | STp->capacity = ntohs(prm->segtrk) * ntohs(prm->trks); |
| 2764 | #if DEBUG |
| 2765 | printk(OSST_DEB_MSG "%s:D: Density %d, tape length: %dMB, drive buffer size: %dKB\n", |
| 2766 | name, STp->density, STp->capacity / 32, drive_buffer_size); |
| 2767 | #endif |
| 2768 | |
| 2769 | return 0; |
| 2770 | |
| 2771 | } |
| 2772 | |
| 2773 | |
| 2774 | /* Step over EOF if it has been inadvertently crossed (ioctl not used because |
| 2775 | it messes up the block number). */ |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 2776 | static int cross_eof(struct osst_tape *STp, struct osst_request ** aSRpnt, int forward) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2777 | { |
| 2778 | int result; |
| 2779 | char * name = tape_name(STp); |
| 2780 | |
| 2781 | #if DEBUG |
| 2782 | if (debugging) |
| 2783 | printk(OSST_DEB_MSG "%s:D: Stepping over filemark %s.\n", |
| 2784 | name, forward ? "forward" : "backward"); |
| 2785 | #endif |
| 2786 | |
| 2787 | if (forward) { |
| 2788 | /* assumes that the filemark is already read by the drive, so this is low cost */ |
| 2789 | result = osst_space_over_filemarks_forward_slow(STp, aSRpnt, MTFSF, 1); |
| 2790 | } |
| 2791 | else |
| 2792 | /* assumes this is only called if we just read the filemark! */ |
| 2793 | result = osst_seek_logical_blk(STp, aSRpnt, STp->logical_blk_num - 1); |
| 2794 | |
| 2795 | if (result < 0) |
| 2796 | printk(KERN_WARNING "%s:W: Stepping over filemark %s failed.\n", |
| 2797 | name, forward ? "forward" : "backward"); |
| 2798 | |
| 2799 | return result; |
| 2800 | } |
| 2801 | |
| 2802 | |
| 2803 | /* Get the tape position. */ |
| 2804 | |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 2805 | static int osst_get_frame_position(struct osst_tape *STp, struct osst_request ** aSRpnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2806 | { |
| 2807 | unsigned char scmd[MAX_COMMAND_SIZE]; |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 2808 | struct osst_request * SRpnt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2809 | int result = 0; |
| 2810 | char * name = tape_name(STp); |
| 2811 | |
| 2812 | /* KG: We want to be able to use it for checking Write Buffer availability |
| 2813 | * and thus don't want to risk to overwrite anything. Exchange buffers ... */ |
| 2814 | char mybuf[24]; |
| 2815 | char * olddata = STp->buffer->b_data; |
| 2816 | int oldsize = STp->buffer->buffer_size; |
| 2817 | |
| 2818 | if (STp->ready != ST_READY) return (-EIO); |
| 2819 | |
| 2820 | memset (scmd, 0, MAX_COMMAND_SIZE); |
| 2821 | scmd[0] = READ_POSITION; |
| 2822 | |
| 2823 | STp->buffer->b_data = mybuf; STp->buffer->buffer_size = 24; |
| 2824 | SRpnt = osst_do_scsi(*aSRpnt, STp, scmd, 20, DMA_FROM_DEVICE, |
| 2825 | STp->timeout, MAX_RETRIES, 1); |
| 2826 | if (!SRpnt) { |
| 2827 | STp->buffer->b_data = olddata; STp->buffer->buffer_size = oldsize; |
| 2828 | return (-EBUSY); |
| 2829 | } |
| 2830 | *aSRpnt = SRpnt; |
| 2831 | |
| 2832 | if (STp->buffer->syscall_result) |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 2833 | result = ((SRpnt->sense[2] & 0x0f) == 3) ? -EIO : -EINVAL; /* 3: Write Error */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2834 | |
| 2835 | if (result == -EINVAL) |
| 2836 | printk(KERN_ERR "%s:E: Can't read tape position.\n", name); |
| 2837 | else { |
| 2838 | if (result == -EIO) { /* re-read position - this needs to preserve media errors */ |
| 2839 | unsigned char mysense[16]; |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 2840 | memcpy (mysense, SRpnt->sense, 16); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2841 | memset (scmd, 0, MAX_COMMAND_SIZE); |
| 2842 | scmd[0] = READ_POSITION; |
| 2843 | STp->buffer->b_data = mybuf; STp->buffer->buffer_size = 24; |
| 2844 | SRpnt = osst_do_scsi(SRpnt, STp, scmd, 20, DMA_FROM_DEVICE, |
| 2845 | STp->timeout, MAX_RETRIES, 1); |
| 2846 | #if DEBUG |
| 2847 | printk(OSST_DEB_MSG "%s:D: Reread position, reason=[%02x:%02x:%02x], result=[%s%02x:%02x:%02x]\n", |
| 2848 | name, mysense[2], mysense[12], mysense[13], STp->buffer->syscall_result?"":"ok:", |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 2849 | SRpnt->sense[2],SRpnt->sense[12],SRpnt->sense[13]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2850 | #endif |
| 2851 | if (!STp->buffer->syscall_result) |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 2852 | memcpy (SRpnt->sense, mysense, 16); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2853 | else |
| 2854 | printk(KERN_WARNING "%s:W: Double error in get position\n", name); |
| 2855 | } |
| 2856 | STp->first_frame_position = ((STp->buffer)->b_data[4] << 24) |
| 2857 | + ((STp->buffer)->b_data[5] << 16) |
| 2858 | + ((STp->buffer)->b_data[6] << 8) |
| 2859 | + (STp->buffer)->b_data[7]; |
| 2860 | STp->last_frame_position = ((STp->buffer)->b_data[ 8] << 24) |
| 2861 | + ((STp->buffer)->b_data[ 9] << 16) |
| 2862 | + ((STp->buffer)->b_data[10] << 8) |
| 2863 | + (STp->buffer)->b_data[11]; |
| 2864 | STp->cur_frames = (STp->buffer)->b_data[15]; |
| 2865 | #if DEBUG |
| 2866 | if (debugging) { |
| 2867 | printk(OSST_DEB_MSG "%s:D: Drive Positions: host %d, tape %d%s, buffer %d\n", name, |
| 2868 | STp->first_frame_position, STp->last_frame_position, |
| 2869 | ((STp->buffer)->b_data[0]&0x80)?" (BOP)": |
| 2870 | ((STp->buffer)->b_data[0]&0x40)?" (EOP)":"", |
| 2871 | STp->cur_frames); |
| 2872 | } |
| 2873 | #endif |
| 2874 | if (STp->cur_frames == 0 && STp->first_frame_position != STp->last_frame_position) { |
| 2875 | #if DEBUG |
| 2876 | printk(OSST_DEB_MSG "%s:D: Correcting read position %d, %d, %d\n", name, |
| 2877 | STp->first_frame_position, STp->last_frame_position, STp->cur_frames); |
| 2878 | #endif |
| 2879 | STp->first_frame_position = STp->last_frame_position; |
| 2880 | } |
| 2881 | } |
| 2882 | STp->buffer->b_data = olddata; STp->buffer->buffer_size = oldsize; |
| 2883 | |
| 2884 | return (result == 0 ? STp->first_frame_position : result); |
| 2885 | } |
| 2886 | |
| 2887 | |
| 2888 | /* Set the tape block */ |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 2889 | static int osst_set_frame_position(struct osst_tape *STp, struct osst_request ** aSRpnt, int ppos, int skip) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2890 | { |
| 2891 | unsigned char scmd[MAX_COMMAND_SIZE]; |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 2892 | struct osst_request * SRpnt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2893 | struct st_partstat * STps; |
| 2894 | int result = 0; |
| 2895 | int pp = (ppos == 3000 && !skip)? 0 : ppos; |
| 2896 | char * name = tape_name(STp); |
| 2897 | |
| 2898 | if (STp->ready != ST_READY) return (-EIO); |
| 2899 | |
| 2900 | STps = &(STp->ps[STp->partition]); |
| 2901 | |
| 2902 | if (ppos < 0 || ppos > STp->capacity) { |
| 2903 | printk(KERN_WARNING "%s:W: Reposition request %d out of range\n", name, ppos); |
| 2904 | pp = ppos = ppos < 0 ? 0 : (STp->capacity - 1); |
| 2905 | result = (-EINVAL); |
| 2906 | } |
| 2907 | |
| 2908 | do { |
| 2909 | #if DEBUG |
| 2910 | if (debugging) |
| 2911 | printk(OSST_DEB_MSG "%s:D: Setting ppos to %d.\n", name, pp); |
| 2912 | #endif |
| 2913 | memset (scmd, 0, MAX_COMMAND_SIZE); |
| 2914 | scmd[0] = SEEK_10; |
| 2915 | scmd[1] = 1; |
| 2916 | scmd[3] = (pp >> 24); |
| 2917 | scmd[4] = (pp >> 16); |
| 2918 | scmd[5] = (pp >> 8); |
| 2919 | scmd[6] = pp; |
| 2920 | if (skip) |
| 2921 | scmd[9] = 0x80; |
| 2922 | |
| 2923 | SRpnt = osst_do_scsi(*aSRpnt, STp, scmd, 0, DMA_NONE, STp->long_timeout, |
| 2924 | MAX_RETRIES, 1); |
| 2925 | if (!SRpnt) |
| 2926 | return (-EBUSY); |
| 2927 | *aSRpnt = SRpnt; |
| 2928 | |
| 2929 | if ((STp->buffer)->syscall_result != 0) { |
| 2930 | #if DEBUG |
| 2931 | printk(OSST_DEB_MSG "%s:D: SEEK command from %d to %d failed.\n", |
| 2932 | name, STp->first_frame_position, pp); |
| 2933 | #endif |
| 2934 | result = (-EIO); |
| 2935 | } |
| 2936 | if (pp != ppos) |
| 2937 | osst_wait_ready(STp, aSRpnt, 5 * 60, OSST_WAIT_POSITION_COMPLETE); |
| 2938 | } while ((pp != ppos) && (pp = ppos)); |
| 2939 | STp->first_frame_position = STp->last_frame_position = ppos; |
| 2940 | STps->eof = ST_NOEOF; |
| 2941 | STps->at_sm = 0; |
| 2942 | STps->rw = ST_IDLE; |
| 2943 | STp->frame_in_buffer = 0; |
| 2944 | return result; |
| 2945 | } |
| 2946 | |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 2947 | static int osst_write_trailer(struct osst_tape *STp, struct osst_request ** aSRpnt, int leave_at_EOT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2948 | { |
| 2949 | struct st_partstat * STps = &(STp->ps[STp->partition]); |
| 2950 | int result = 0; |
| 2951 | |
| 2952 | if (STp->write_type != OS_WRITE_NEW_MARK) { |
| 2953 | /* true unless the user wrote the filemark for us */ |
| 2954 | result = osst_flush_drive_buffer(STp, aSRpnt); |
| 2955 | if (result < 0) goto out; |
| 2956 | result = osst_write_filemark(STp, aSRpnt); |
| 2957 | if (result < 0) goto out; |
| 2958 | |
| 2959 | if (STps->drv_file >= 0) |
| 2960 | STps->drv_file++ ; |
| 2961 | STps->drv_block = 0; |
| 2962 | } |
| 2963 | result = osst_write_eod(STp, aSRpnt); |
| 2964 | osst_write_header(STp, aSRpnt, leave_at_EOT); |
| 2965 | |
| 2966 | STps->eof = ST_FM; |
| 2967 | out: |
| 2968 | return result; |
| 2969 | } |
| 2970 | |
| 2971 | /* osst versions of st functions - augmented and stripped to suit OnStream only */ |
| 2972 | |
| 2973 | /* Flush the write buffer (never need to write if variable blocksize). */ |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 2974 | static int osst_flush_write_buffer(struct osst_tape *STp, struct osst_request ** aSRpnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2975 | { |
| 2976 | int offset, transfer, blks = 0; |
| 2977 | int result = 0; |
| 2978 | unsigned char cmd[MAX_COMMAND_SIZE]; |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 2979 | struct osst_request * SRpnt = *aSRpnt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2980 | struct st_partstat * STps; |
| 2981 | char * name = tape_name(STp); |
| 2982 | |
| 2983 | if ((STp->buffer)->writing) { |
| 2984 | if (SRpnt == (STp->buffer)->last_SRpnt) |
| 2985 | #if DEBUG |
| 2986 | { printk(OSST_DEB_MSG |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 2987 | "%s:D: aSRpnt points to osst_request that write_behind_check will release -- cleared\n", name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2988 | #endif |
| 2989 | *aSRpnt = SRpnt = NULL; |
| 2990 | #if DEBUG |
| 2991 | } else if (SRpnt) |
| 2992 | printk(OSST_DEB_MSG |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 2993 | "%s:D: aSRpnt does not point to osst_request that write_behind_check will release -- strange\n", name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2994 | #endif |
| 2995 | osst_write_behind_check(STp); |
| 2996 | if ((STp->buffer)->syscall_result) { |
| 2997 | #if DEBUG |
| 2998 | if (debugging) |
| 2999 | printk(OSST_DEB_MSG "%s:D: Async write error (flush) %x.\n", |
| 3000 | name, (STp->buffer)->midlevel_result); |
| 3001 | #endif |
| 3002 | if ((STp->buffer)->midlevel_result == INT_MAX) |
| 3003 | return (-ENOSPC); |
| 3004 | return (-EIO); |
| 3005 | } |
| 3006 | } |
| 3007 | |
| 3008 | result = 0; |
| 3009 | if (STp->dirty == 1) { |
| 3010 | |
| 3011 | STp->write_count++; |
| 3012 | STps = &(STp->ps[STp->partition]); |
| 3013 | STps->rw = ST_WRITING; |
| 3014 | offset = STp->buffer->buffer_bytes; |
| 3015 | blks = (offset + STp->block_size - 1) / STp->block_size; |
| 3016 | transfer = OS_FRAME_SIZE; |
| 3017 | |
| 3018 | if (offset < OS_DATA_SIZE) |
| 3019 | osst_zero_buffer_tail(STp->buffer); |
| 3020 | |
| 3021 | if (STp->poll) |
| 3022 | if (osst_wait_frame (STp, aSRpnt, STp->first_frame_position, -50, 120)) |
| 3023 | result = osst_recover_wait_frame(STp, aSRpnt, 1); |
| 3024 | |
| 3025 | memset(cmd, 0, MAX_COMMAND_SIZE); |
| 3026 | cmd[0] = WRITE_6; |
| 3027 | cmd[1] = 1; |
| 3028 | cmd[4] = 1; |
| 3029 | |
| 3030 | switch (STp->write_type) { |
| 3031 | case OS_WRITE_DATA: |
| 3032 | #if DEBUG |
| 3033 | if (debugging) |
| 3034 | printk(OSST_DEB_MSG "%s:D: Writing %d blocks to frame %d, lblks %d-%d\n", |
| 3035 | name, blks, STp->frame_seq_number, |
| 3036 | STp->logical_blk_num - blks, STp->logical_blk_num - 1); |
| 3037 | #endif |
| 3038 | osst_init_aux(STp, OS_FRAME_TYPE_DATA, STp->frame_seq_number++, |
| 3039 | STp->logical_blk_num - blks, STp->block_size, blks); |
| 3040 | break; |
| 3041 | case OS_WRITE_EOD: |
| 3042 | osst_init_aux(STp, OS_FRAME_TYPE_EOD, STp->frame_seq_number++, |
| 3043 | STp->logical_blk_num, 0, 0); |
| 3044 | break; |
| 3045 | case OS_WRITE_NEW_MARK: |
| 3046 | osst_init_aux(STp, OS_FRAME_TYPE_MARKER, STp->frame_seq_number++, |
| 3047 | STp->logical_blk_num++, 0, blks=1); |
| 3048 | break; |
| 3049 | case OS_WRITE_HEADER: |
| 3050 | osst_init_aux(STp, OS_FRAME_TYPE_HEADER, 0, 0, 0, blks=0); |
| 3051 | break; |
| 3052 | default: /* probably FILLER */ |
| 3053 | osst_init_aux(STp, OS_FRAME_TYPE_FILL, 0, 0, 0, 0); |
| 3054 | } |
| 3055 | #if DEBUG |
| 3056 | if (debugging) |
| 3057 | printk(OSST_DEB_MSG "%s:D: Flushing %d bytes, Transfering %d bytes in %d lblocks.\n", |
| 3058 | name, offset, transfer, blks); |
| 3059 | #endif |
| 3060 | |
| 3061 | SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, transfer, DMA_TO_DEVICE, |
| 3062 | STp->timeout, MAX_RETRIES, 1); |
| 3063 | *aSRpnt = SRpnt; |
| 3064 | if (!SRpnt) |
| 3065 | return (-EBUSY); |
| 3066 | |
| 3067 | if ((STp->buffer)->syscall_result != 0) { |
| 3068 | #if DEBUG |
| 3069 | printk(OSST_DEB_MSG |
| 3070 | "%s:D: write sense [0]=0x%02x [2]=%02x [12]=%02x [13]=%02x\n", |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 3071 | name, SRpnt->sense[0], SRpnt->sense[2], |
| 3072 | SRpnt->sense[12], SRpnt->sense[13]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3073 | #endif |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 3074 | if ((SRpnt->sense[0] & 0x70) == 0x70 && |
| 3075 | (SRpnt->sense[2] & 0x40) && /* FIXME - SC-30 drive doesn't assert EOM bit */ |
| 3076 | (SRpnt->sense[2] & 0x0f) == NO_SENSE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3077 | STp->dirty = 0; |
| 3078 | (STp->buffer)->buffer_bytes = 0; |
| 3079 | result = (-ENOSPC); |
| 3080 | } |
| 3081 | else { |
| 3082 | if (osst_write_error_recovery(STp, aSRpnt, 1)) { |
| 3083 | printk(KERN_ERR "%s:E: Error on flush write.\n", name); |
| 3084 | result = (-EIO); |
| 3085 | } |
| 3086 | } |
| 3087 | STps->drv_block = (-1); /* FIXME - even if write recovery succeeds? */ |
| 3088 | } |
| 3089 | else { |
| 3090 | STp->first_frame_position++; |
| 3091 | STp->dirty = 0; |
| 3092 | (STp->buffer)->buffer_bytes = 0; |
| 3093 | } |
| 3094 | } |
| 3095 | #if DEBUG |
| 3096 | printk(OSST_DEB_MSG "%s:D: Exit flush write buffer with code %d\n", name, result); |
| 3097 | #endif |
| 3098 | return result; |
| 3099 | } |
| 3100 | |
| 3101 | |
| 3102 | /* Flush the tape buffer. The tape will be positioned correctly unless |
| 3103 | seek_next is true. */ |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 3104 | static int osst_flush_buffer(struct osst_tape * STp, struct osst_request ** aSRpnt, int seek_next) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3105 | { |
| 3106 | struct st_partstat * STps; |
| 3107 | int backspace = 0, result = 0; |
| 3108 | #if DEBUG |
| 3109 | char * name = tape_name(STp); |
| 3110 | #endif |
| 3111 | |
| 3112 | /* |
| 3113 | * If there was a bus reset, block further access |
| 3114 | * to this device. |
| 3115 | */ |
| 3116 | if( STp->pos_unknown) |
| 3117 | return (-EIO); |
| 3118 | |
| 3119 | if (STp->ready != ST_READY) |
| 3120 | return 0; |
| 3121 | |
| 3122 | STps = &(STp->ps[STp->partition]); |
| 3123 | if (STps->rw == ST_WRITING || STp->dirty) { /* Writing */ |
| 3124 | STp->write_type = OS_WRITE_DATA; |
| 3125 | return osst_flush_write_buffer(STp, aSRpnt); |
| 3126 | } |
| 3127 | if (STp->block_size == 0) |
| 3128 | return 0; |
| 3129 | |
| 3130 | #if DEBUG |
| 3131 | printk(OSST_DEB_MSG "%s:D: Reached flush (read) buffer\n", name); |
| 3132 | #endif |
| 3133 | |
| 3134 | if (!STp->can_bsr) { |
| 3135 | backspace = ((STp->buffer)->buffer_bytes + (STp->buffer)->read_pointer) / STp->block_size - |
| 3136 | ((STp->buffer)->read_pointer + STp->block_size - 1 ) / STp->block_size ; |
| 3137 | (STp->buffer)->buffer_bytes = 0; |
| 3138 | (STp->buffer)->read_pointer = 0; |
| 3139 | STp->frame_in_buffer = 0; /* FIXME is this relevant w. OSST? */ |
| 3140 | } |
| 3141 | |
| 3142 | if (!seek_next) { |
| 3143 | if (STps->eof == ST_FM_HIT) { |
| 3144 | result = cross_eof(STp, aSRpnt, 0); /* Back over the EOF hit */ |
| 3145 | if (!result) |
| 3146 | STps->eof = ST_NOEOF; |
| 3147 | else { |
| 3148 | if (STps->drv_file >= 0) |
| 3149 | STps->drv_file++; |
| 3150 | STps->drv_block = 0; |
| 3151 | } |
| 3152 | } |
| 3153 | if (!result && backspace > 0) /* TODO -- design and run a test case for this */ |
| 3154 | result = osst_seek_logical_blk(STp, aSRpnt, STp->logical_blk_num - backspace); |
| 3155 | } |
| 3156 | else if (STps->eof == ST_FM_HIT) { |
| 3157 | if (STps->drv_file >= 0) |
| 3158 | STps->drv_file++; |
| 3159 | STps->drv_block = 0; |
| 3160 | STps->eof = ST_NOEOF; |
| 3161 | } |
| 3162 | |
| 3163 | return result; |
| 3164 | } |
| 3165 | |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 3166 | static int osst_write_frame(struct osst_tape * STp, struct osst_request ** aSRpnt, int synchronous) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3167 | { |
| 3168 | unsigned char cmd[MAX_COMMAND_SIZE]; |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 3169 | struct osst_request * SRpnt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3170 | int blks; |
| 3171 | #if DEBUG |
| 3172 | char * name = tape_name(STp); |
| 3173 | #endif |
| 3174 | |
| 3175 | if ((!STp-> raw) && (STp->first_frame_position == 0xbae)) { /* _must_ preserve buffer! */ |
| 3176 | #if DEBUG |
| 3177 | printk(OSST_DEB_MSG "%s:D: Reaching config partition.\n", name); |
| 3178 | #endif |
| 3179 | if (osst_flush_drive_buffer(STp, aSRpnt) < 0) { |
| 3180 | return (-EIO); |
| 3181 | } |
| 3182 | /* error recovery may have bumped us past the header partition */ |
| 3183 | if (osst_get_frame_position(STp, aSRpnt) < 0xbb8) { |
| 3184 | #if DEBUG |
| 3185 | printk(OSST_DEB_MSG "%s:D: Skipping over config partition.\n", name); |
| 3186 | #endif |
| 3187 | osst_position_tape_and_confirm(STp, aSRpnt, 0xbb8); |
| 3188 | } |
| 3189 | } |
| 3190 | |
| 3191 | if (STp->poll) |
| 3192 | if (osst_wait_frame (STp, aSRpnt, STp->first_frame_position, -48, 120)) |
| 3193 | if (osst_recover_wait_frame(STp, aSRpnt, 1)) |
| 3194 | return (-EIO); |
| 3195 | |
| 3196 | // osst_build_stats(STp, &SRpnt); |
| 3197 | |
| 3198 | STp->ps[STp->partition].rw = ST_WRITING; |
| 3199 | STp->write_type = OS_WRITE_DATA; |
| 3200 | |
| 3201 | memset(cmd, 0, MAX_COMMAND_SIZE); |
| 3202 | cmd[0] = WRITE_6; |
| 3203 | cmd[1] = 1; |
| 3204 | cmd[4] = 1; /* one frame at a time... */ |
| 3205 | blks = STp->buffer->buffer_bytes / STp->block_size; |
| 3206 | #if DEBUG |
| 3207 | if (debugging) |
| 3208 | printk(OSST_DEB_MSG "%s:D: Writing %d blocks to frame %d, lblks %d-%d\n", name, blks, |
| 3209 | STp->frame_seq_number, STp->logical_blk_num - blks, STp->logical_blk_num - 1); |
| 3210 | #endif |
| 3211 | osst_init_aux(STp, OS_FRAME_TYPE_DATA, STp->frame_seq_number++, |
| 3212 | STp->logical_blk_num - blks, STp->block_size, blks); |
| 3213 | |
| 3214 | #if DEBUG |
| 3215 | if (!synchronous) |
| 3216 | STp->write_pending = 1; |
| 3217 | #endif |
| 3218 | SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, OS_FRAME_SIZE, DMA_TO_DEVICE, STp->timeout, |
| 3219 | MAX_RETRIES, synchronous); |
| 3220 | if (!SRpnt) |
| 3221 | return (-EBUSY); |
| 3222 | *aSRpnt = SRpnt; |
| 3223 | |
| 3224 | if (synchronous) { |
| 3225 | if (STp->buffer->syscall_result != 0) { |
| 3226 | #if DEBUG |
| 3227 | if (debugging) |
| 3228 | printk(OSST_DEB_MSG "%s:D: Error on write:\n", name); |
| 3229 | #endif |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 3230 | if ((SRpnt->sense[0] & 0x70) == 0x70 && |
| 3231 | (SRpnt->sense[2] & 0x40)) { |
| 3232 | if ((SRpnt->sense[2] & 0x0f) == VOLUME_OVERFLOW) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3233 | return (-ENOSPC); |
| 3234 | } |
| 3235 | else { |
| 3236 | if (osst_write_error_recovery(STp, aSRpnt, 1)) |
| 3237 | return (-EIO); |
| 3238 | } |
| 3239 | } |
| 3240 | else |
| 3241 | STp->first_frame_position++; |
| 3242 | } |
| 3243 | |
| 3244 | STp->write_count++; |
| 3245 | |
| 3246 | return 0; |
| 3247 | } |
| 3248 | |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 3249 | /* Lock or unlock the drive door. Don't use when struct osst_request allocated. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3250 | static int do_door_lock(struct osst_tape * STp, int do_lock) |
| 3251 | { |
| 3252 | int retval, cmd; |
| 3253 | |
| 3254 | cmd = do_lock ? SCSI_IOCTL_DOORLOCK : SCSI_IOCTL_DOORUNLOCK; |
| 3255 | #if DEBUG |
| 3256 | printk(OSST_DEB_MSG "%s:D: %socking drive door.\n", tape_name(STp), do_lock ? "L" : "Unl"); |
| 3257 | #endif |
| 3258 | retval = scsi_ioctl(STp->device, cmd, NULL); |
| 3259 | if (!retval) { |
| 3260 | STp->door_locked = do_lock ? ST_LOCKED_EXPLICIT : ST_UNLOCKED; |
| 3261 | } |
| 3262 | else { |
| 3263 | STp->door_locked = ST_LOCK_FAILS; |
| 3264 | } |
| 3265 | return retval; |
| 3266 | } |
| 3267 | |
| 3268 | /* Set the internal state after reset */ |
| 3269 | static void reset_state(struct osst_tape *STp) |
| 3270 | { |
| 3271 | int i; |
| 3272 | struct st_partstat *STps; |
| 3273 | |
| 3274 | STp->pos_unknown = 0; |
| 3275 | for (i = 0; i < ST_NBR_PARTITIONS; i++) { |
| 3276 | STps = &(STp->ps[i]); |
| 3277 | STps->rw = ST_IDLE; |
| 3278 | STps->eof = ST_NOEOF; |
| 3279 | STps->at_sm = 0; |
| 3280 | STps->last_block_valid = 0; |
| 3281 | STps->drv_block = -1; |
| 3282 | STps->drv_file = -1; |
| 3283 | } |
| 3284 | } |
| 3285 | |
| 3286 | |
| 3287 | /* Entry points to osst */ |
| 3288 | |
| 3289 | /* Write command */ |
| 3290 | static ssize_t osst_write(struct file * filp, const char __user * buf, size_t count, loff_t *ppos) |
| 3291 | { |
| 3292 | ssize_t total, retval = 0; |
| 3293 | ssize_t i, do_count, blks, transfer; |
| 3294 | int write_threshold; |
| 3295 | int doing_write = 0; |
| 3296 | const char __user * b_point; |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 3297 | struct osst_request * SRpnt = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3298 | struct st_modedef * STm; |
| 3299 | struct st_partstat * STps; |
| 3300 | struct osst_tape * STp = filp->private_data; |
| 3301 | char * name = tape_name(STp); |
| 3302 | |
| 3303 | |
Matthias Kaehlcke | 4390e60 | 2007-08-10 14:50:44 -0700 | [diff] [blame] | 3304 | if (mutex_lock_interruptible(&STp->lock)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3305 | return (-ERESTARTSYS); |
| 3306 | |
| 3307 | /* |
| 3308 | * If we are in the middle of error recovery, don't let anyone |
| 3309 | * else try and use this device. Also, if error recovery fails, it |
| 3310 | * may try and take the device offline, in which case all further |
| 3311 | * access to the device is prohibited. |
| 3312 | */ |
| 3313 | if( !scsi_block_when_processing_errors(STp->device) ) { |
| 3314 | retval = (-ENXIO); |
| 3315 | goto out; |
| 3316 | } |
| 3317 | |
| 3318 | if (STp->ready != ST_READY) { |
| 3319 | if (STp->ready == ST_NO_TAPE) |
| 3320 | retval = (-ENOMEDIUM); |
| 3321 | else |
| 3322 | retval = (-EIO); |
| 3323 | goto out; |
| 3324 | } |
| 3325 | STm = &(STp->modes[STp->current_mode]); |
| 3326 | if (!STm->defined) { |
| 3327 | retval = (-ENXIO); |
| 3328 | goto out; |
| 3329 | } |
| 3330 | if (count == 0) |
| 3331 | goto out; |
| 3332 | |
| 3333 | /* |
| 3334 | * If there was a bus reset, block further access |
| 3335 | * to this device. |
| 3336 | */ |
| 3337 | if (STp->pos_unknown) { |
| 3338 | retval = (-EIO); |
| 3339 | goto out; |
| 3340 | } |
| 3341 | |
| 3342 | #if DEBUG |
| 3343 | if (!STp->in_use) { |
| 3344 | printk(OSST_DEB_MSG "%s:D: Incorrect device.\n", name); |
| 3345 | retval = (-EIO); |
| 3346 | goto out; |
| 3347 | } |
| 3348 | #endif |
| 3349 | |
| 3350 | if (STp->write_prot) { |
| 3351 | retval = (-EACCES); |
| 3352 | goto out; |
| 3353 | } |
| 3354 | |
| 3355 | /* Write must be integral number of blocks */ |
| 3356 | if (STp->block_size != 0 && (count % STp->block_size) != 0) { |
| 3357 | printk(KERN_ERR "%s:E: Write (%Zd bytes) not multiple of tape block size (%d%c).\n", |
| 3358 | name, count, STp->block_size<1024? |
| 3359 | STp->block_size:STp->block_size/1024, STp->block_size<1024?'b':'k'); |
| 3360 | retval = (-EINVAL); |
| 3361 | goto out; |
| 3362 | } |
| 3363 | |
| 3364 | if (STp->first_frame_position >= STp->capacity - OSST_EOM_RESERVE) { |
| 3365 | printk(KERN_ERR "%s:E: Write truncated at EOM early warning (frame %d).\n", |
| 3366 | name, STp->first_frame_position); |
| 3367 | retval = (-ENOSPC); |
| 3368 | goto out; |
| 3369 | } |
| 3370 | |
| 3371 | if (STp->do_auto_lock && STp->door_locked == ST_UNLOCKED && !do_door_lock(STp, 1)) |
| 3372 | STp->door_locked = ST_LOCKED_AUTO; |
| 3373 | |
| 3374 | STps = &(STp->ps[STp->partition]); |
| 3375 | |
| 3376 | if (STps->rw == ST_READING) { |
| 3377 | #if DEBUG |
| 3378 | printk(OSST_DEB_MSG "%s:D: Switching from read to write at file %d, block %d\n", name, |
| 3379 | STps->drv_file, STps->drv_block); |
| 3380 | #endif |
| 3381 | retval = osst_flush_buffer(STp, &SRpnt, 0); |
| 3382 | if (retval) |
| 3383 | goto out; |
| 3384 | STps->rw = ST_IDLE; |
| 3385 | } |
| 3386 | if (STps->rw != ST_WRITING) { |
| 3387 | /* Are we totally rewriting this tape? */ |
| 3388 | if (!STp->header_ok || |
| 3389 | (STp->first_frame_position == STp->first_data_ppos && STps->drv_block < 0) || |
| 3390 | (STps->drv_file == 0 && STps->drv_block == 0)) { |
| 3391 | STp->wrt_pass_cntr++; |
| 3392 | #if DEBUG |
| 3393 | printk(OSST_DEB_MSG "%s:D: Allocating next write pass counter: %d\n", |
| 3394 | name, STp->wrt_pass_cntr); |
| 3395 | #endif |
| 3396 | osst_reset_header(STp, &SRpnt); |
| 3397 | STps->drv_file = STps->drv_block = 0; |
| 3398 | } |
| 3399 | /* Do we know where we'll be writing on the tape? */ |
| 3400 | else { |
| 3401 | if ((STp->fast_open && osst_verify_position(STp, &SRpnt)) || |
| 3402 | STps->drv_file < 0 || STps->drv_block < 0) { |
| 3403 | if (STp->first_frame_position == STp->eod_frame_ppos) { /* at EOD */ |
| 3404 | STps->drv_file = STp->filemark_cnt; |
| 3405 | STps->drv_block = 0; |
| 3406 | } |
| 3407 | else { |
| 3408 | /* We have no idea where the tape is positioned - give up */ |
| 3409 | #if DEBUG |
| 3410 | printk(OSST_DEB_MSG |
| 3411 | "%s:D: Cannot write at indeterminate position.\n", name); |
| 3412 | #endif |
| 3413 | retval = (-EIO); |
| 3414 | goto out; |
| 3415 | } |
| 3416 | } |
| 3417 | if ((STps->drv_file + STps->drv_block) > 0 && STps->drv_file < STp->filemark_cnt) { |
| 3418 | STp->filemark_cnt = STps->drv_file; |
| 3419 | STp->last_mark_ppos = |
| 3420 | ntohl(STp->header_cache->dat_fm_tab.fm_tab_ent[STp->filemark_cnt-1]); |
| 3421 | printk(KERN_WARNING |
| 3422 | "%s:W: Overwriting file %d with old write pass counter %d\n", |
| 3423 | name, STps->drv_file, STp->wrt_pass_cntr); |
| 3424 | printk(KERN_WARNING |
| 3425 | "%s:W: may lead to stale data being accepted on reading back!\n", |
| 3426 | name); |
| 3427 | #if DEBUG |
| 3428 | printk(OSST_DEB_MSG |
| 3429 | "%s:D: resetting filemark count to %d and last mark ppos,lbn to %d,%d\n", |
| 3430 | name, STp->filemark_cnt, STp->last_mark_ppos, STp->last_mark_lbn); |
| 3431 | #endif |
| 3432 | } |
| 3433 | } |
| 3434 | STp->fast_open = 0; |
| 3435 | } |
| 3436 | if (!STp->header_ok) { |
| 3437 | #if DEBUG |
| 3438 | printk(OSST_DEB_MSG "%s:D: Write cannot proceed without valid headers\n", name); |
| 3439 | #endif |
| 3440 | retval = (-EIO); |
| 3441 | goto out; |
| 3442 | } |
| 3443 | |
| 3444 | if ((STp->buffer)->writing) { |
| 3445 | if (SRpnt) printk(KERN_ERR "%s:A: Not supposed to have SRpnt at line %d\n", name, __LINE__); |
| 3446 | osst_write_behind_check(STp); |
| 3447 | if ((STp->buffer)->syscall_result) { |
| 3448 | #if DEBUG |
| 3449 | if (debugging) |
| 3450 | printk(OSST_DEB_MSG "%s:D: Async write error (write) %x.\n", name, |
| 3451 | (STp->buffer)->midlevel_result); |
| 3452 | #endif |
| 3453 | if ((STp->buffer)->midlevel_result == INT_MAX) |
| 3454 | STps->eof = ST_EOM_OK; |
| 3455 | else |
| 3456 | STps->eof = ST_EOM_ERROR; |
| 3457 | } |
| 3458 | } |
| 3459 | if (STps->eof == ST_EOM_OK) { |
| 3460 | retval = (-ENOSPC); |
| 3461 | goto out; |
| 3462 | } |
| 3463 | else if (STps->eof == ST_EOM_ERROR) { |
| 3464 | retval = (-EIO); |
| 3465 | goto out; |
| 3466 | } |
| 3467 | |
| 3468 | /* Check the buffer readability in cases where copy_user might catch |
| 3469 | the problems after some tape movement. */ |
| 3470 | if ((copy_from_user(&i, buf, 1) != 0 || |
| 3471 | copy_from_user(&i, buf + count - 1, 1) != 0)) { |
| 3472 | retval = (-EFAULT); |
| 3473 | goto out; |
| 3474 | } |
| 3475 | |
| 3476 | if (!STm->do_buffer_writes) { |
| 3477 | write_threshold = 1; |
| 3478 | } |
| 3479 | else |
| 3480 | write_threshold = (STp->buffer)->buffer_blocks * STp->block_size; |
| 3481 | if (!STm->do_async_writes) |
| 3482 | write_threshold--; |
| 3483 | |
| 3484 | total = count; |
| 3485 | #if DEBUG |
| 3486 | if (debugging) |
| 3487 | printk(OSST_DEB_MSG "%s:D: Writing %d bytes to file %d block %d lblk %d fseq %d fppos %d\n", |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 3488 | name, (int) count, STps->drv_file, STps->drv_block, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3489 | STp->logical_blk_num, STp->frame_seq_number, STp->first_frame_position); |
| 3490 | #endif |
| 3491 | b_point = buf; |
| 3492 | while ((STp->buffer)->buffer_bytes + count > write_threshold) |
| 3493 | { |
| 3494 | doing_write = 1; |
| 3495 | do_count = (STp->buffer)->buffer_blocks * STp->block_size - |
| 3496 | (STp->buffer)->buffer_bytes; |
| 3497 | if (do_count > count) |
| 3498 | do_count = count; |
| 3499 | |
| 3500 | i = append_to_buffer(b_point, STp->buffer, do_count); |
| 3501 | if (i) { |
| 3502 | retval = i; |
| 3503 | goto out; |
| 3504 | } |
| 3505 | |
| 3506 | blks = do_count / STp->block_size; |
| 3507 | STp->logical_blk_num += blks; /* logical_blk_num is incremented as data is moved from user */ |
| 3508 | |
| 3509 | i = osst_write_frame(STp, &SRpnt, 1); |
| 3510 | |
| 3511 | if (i == (-ENOSPC)) { |
| 3512 | transfer = STp->buffer->writing; /* FIXME -- check this logic */ |
| 3513 | if (transfer <= do_count) { |
| 3514 | filp->f_pos += do_count - transfer; |
| 3515 | count -= do_count - transfer; |
| 3516 | if (STps->drv_block >= 0) { |
| 3517 | STps->drv_block += (do_count - transfer) / STp->block_size; |
| 3518 | } |
| 3519 | STps->eof = ST_EOM_OK; |
| 3520 | retval = (-ENOSPC); /* EOM within current request */ |
| 3521 | #if DEBUG |
| 3522 | if (debugging) |
| 3523 | printk(OSST_DEB_MSG "%s:D: EOM with %d bytes unwritten.\n", |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 3524 | name, (int) transfer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3525 | #endif |
| 3526 | } |
| 3527 | else { |
| 3528 | STps->eof = ST_EOM_ERROR; |
| 3529 | STps->drv_block = (-1); /* Too cautious? */ |
| 3530 | retval = (-EIO); /* EOM for old data */ |
| 3531 | #if DEBUG |
| 3532 | if (debugging) |
| 3533 | printk(OSST_DEB_MSG "%s:D: EOM with lost data.\n", name); |
| 3534 | #endif |
| 3535 | } |
| 3536 | } |
| 3537 | else |
| 3538 | retval = i; |
| 3539 | |
| 3540 | if (retval < 0) { |
| 3541 | if (SRpnt != NULL) { |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 3542 | osst_release_request(SRpnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3543 | SRpnt = NULL; |
| 3544 | } |
| 3545 | STp->buffer->buffer_bytes = 0; |
| 3546 | STp->dirty = 0; |
| 3547 | if (count < total) |
| 3548 | retval = total - count; |
| 3549 | goto out; |
| 3550 | } |
| 3551 | |
| 3552 | filp->f_pos += do_count; |
| 3553 | b_point += do_count; |
| 3554 | count -= do_count; |
| 3555 | if (STps->drv_block >= 0) { |
| 3556 | STps->drv_block += blks; |
| 3557 | } |
| 3558 | STp->buffer->buffer_bytes = 0; |
| 3559 | STp->dirty = 0; |
| 3560 | } /* end while write threshold exceeded */ |
| 3561 | |
| 3562 | if (count != 0) { |
| 3563 | STp->dirty = 1; |
| 3564 | i = append_to_buffer(b_point, STp->buffer, count); |
| 3565 | if (i) { |
| 3566 | retval = i; |
| 3567 | goto out; |
| 3568 | } |
| 3569 | blks = count / STp->block_size; |
| 3570 | STp->logical_blk_num += blks; |
| 3571 | if (STps->drv_block >= 0) { |
| 3572 | STps->drv_block += blks; |
| 3573 | } |
| 3574 | filp->f_pos += count; |
| 3575 | count = 0; |
| 3576 | } |
| 3577 | |
| 3578 | if (doing_write && (STp->buffer)->syscall_result != 0) { |
| 3579 | retval = (STp->buffer)->syscall_result; |
| 3580 | goto out; |
| 3581 | } |
| 3582 | |
| 3583 | if (STm->do_async_writes && ((STp->buffer)->buffer_bytes >= STp->write_threshold)) { |
| 3584 | /* Schedule an asynchronous write */ |
| 3585 | (STp->buffer)->writing = ((STp->buffer)->buffer_bytes / |
| 3586 | STp->block_size) * STp->block_size; |
| 3587 | STp->dirty = !((STp->buffer)->writing == |
| 3588 | (STp->buffer)->buffer_bytes); |
| 3589 | |
| 3590 | i = osst_write_frame(STp, &SRpnt, 0); |
| 3591 | if (i < 0) { |
| 3592 | retval = (-EIO); |
| 3593 | goto out; |
| 3594 | } |
| 3595 | SRpnt = NULL; /* Prevent releasing this request! */ |
| 3596 | } |
| 3597 | STps->at_sm &= (total == 0); |
| 3598 | if (total > 0) |
| 3599 | STps->eof = ST_NOEOF; |
| 3600 | |
| 3601 | retval = total; |
| 3602 | |
| 3603 | out: |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 3604 | if (SRpnt != NULL) osst_release_request(SRpnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3605 | |
Matthias Kaehlcke | 4390e60 | 2007-08-10 14:50:44 -0700 | [diff] [blame] | 3606 | mutex_unlock(&STp->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3607 | |
| 3608 | return retval; |
| 3609 | } |
| 3610 | |
| 3611 | |
| 3612 | /* Read command */ |
| 3613 | static ssize_t osst_read(struct file * filp, char __user * buf, size_t count, loff_t *ppos) |
| 3614 | { |
| 3615 | ssize_t total, retval = 0; |
| 3616 | ssize_t i, transfer; |
| 3617 | int special; |
| 3618 | struct st_modedef * STm; |
| 3619 | struct st_partstat * STps; |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 3620 | struct osst_request * SRpnt = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3621 | struct osst_tape * STp = filp->private_data; |
| 3622 | char * name = tape_name(STp); |
| 3623 | |
| 3624 | |
Matthias Kaehlcke | 4390e60 | 2007-08-10 14:50:44 -0700 | [diff] [blame] | 3625 | if (mutex_lock_interruptible(&STp->lock)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3626 | return (-ERESTARTSYS); |
| 3627 | |
| 3628 | /* |
| 3629 | * If we are in the middle of error recovery, don't let anyone |
| 3630 | * else try and use this device. Also, if error recovery fails, it |
| 3631 | * may try and take the device offline, in which case all further |
| 3632 | * access to the device is prohibited. |
| 3633 | */ |
| 3634 | if( !scsi_block_when_processing_errors(STp->device) ) { |
| 3635 | retval = (-ENXIO); |
| 3636 | goto out; |
| 3637 | } |
| 3638 | |
| 3639 | if (STp->ready != ST_READY) { |
| 3640 | if (STp->ready == ST_NO_TAPE) |
| 3641 | retval = (-ENOMEDIUM); |
| 3642 | else |
| 3643 | retval = (-EIO); |
| 3644 | goto out; |
| 3645 | } |
| 3646 | STm = &(STp->modes[STp->current_mode]); |
| 3647 | if (!STm->defined) { |
| 3648 | retval = (-ENXIO); |
| 3649 | goto out; |
| 3650 | } |
| 3651 | #if DEBUG |
| 3652 | if (!STp->in_use) { |
| 3653 | printk(OSST_DEB_MSG "%s:D: Incorrect device.\n", name); |
| 3654 | retval = (-EIO); |
| 3655 | goto out; |
| 3656 | } |
| 3657 | #endif |
| 3658 | /* Must have initialized medium */ |
| 3659 | if (!STp->header_ok) { |
| 3660 | retval = (-EIO); |
| 3661 | goto out; |
| 3662 | } |
| 3663 | |
| 3664 | if (STp->do_auto_lock && STp->door_locked == ST_UNLOCKED && !do_door_lock(STp, 1)) |
| 3665 | STp->door_locked = ST_LOCKED_AUTO; |
| 3666 | |
| 3667 | STps = &(STp->ps[STp->partition]); |
| 3668 | if (STps->rw == ST_WRITING) { |
| 3669 | retval = osst_flush_buffer(STp, &SRpnt, 0); |
| 3670 | if (retval) |
| 3671 | goto out; |
| 3672 | STps->rw = ST_IDLE; |
| 3673 | /* FIXME -- this may leave the tape without EOD and up2date headers */ |
| 3674 | } |
| 3675 | |
| 3676 | if ((count % STp->block_size) != 0) { |
| 3677 | printk(KERN_WARNING |
| 3678 | "%s:W: Read (%Zd bytes) not multiple of tape block size (%d%c).\n", name, count, |
| 3679 | STp->block_size<1024?STp->block_size:STp->block_size/1024, STp->block_size<1024?'b':'k'); |
| 3680 | } |
| 3681 | |
| 3682 | #if DEBUG |
| 3683 | if (debugging && STps->eof != ST_NOEOF) |
| 3684 | printk(OSST_DEB_MSG "%s:D: EOF/EOM flag up (%d). Bytes %d\n", name, |
| 3685 | STps->eof, (STp->buffer)->buffer_bytes); |
| 3686 | #endif |
| 3687 | if ((STp->buffer)->buffer_bytes == 0 && |
| 3688 | STps->eof >= ST_EOD_1) { |
| 3689 | if (STps->eof < ST_EOD) { |
| 3690 | STps->eof += 1; |
| 3691 | retval = 0; |
| 3692 | goto out; |
| 3693 | } |
| 3694 | retval = (-EIO); /* EOM or Blank Check */ |
| 3695 | goto out; |
| 3696 | } |
| 3697 | |
| 3698 | /* Check the buffer writability before any tape movement. Don't alter |
| 3699 | buffer data. */ |
| 3700 | if (copy_from_user(&i, buf, 1) != 0 || |
| 3701 | copy_to_user (buf, &i, 1) != 0 || |
| 3702 | copy_from_user(&i, buf + count - 1, 1) != 0 || |
| 3703 | copy_to_user (buf + count - 1, &i, 1) != 0) { |
| 3704 | retval = (-EFAULT); |
| 3705 | goto out; |
| 3706 | } |
| 3707 | |
| 3708 | /* Loop until enough data in buffer or a special condition found */ |
| 3709 | for (total = 0, special = 0; total < count - STp->block_size + 1 && !special; ) { |
| 3710 | |
| 3711 | /* Get new data if the buffer is empty */ |
| 3712 | if ((STp->buffer)->buffer_bytes == 0) { |
| 3713 | if (STps->eof == ST_FM_HIT) |
| 3714 | break; |
| 3715 | special = osst_get_logical_frame(STp, &SRpnt, STp->frame_seq_number, 0); |
| 3716 | if (special < 0) { /* No need to continue read */ |
| 3717 | STp->frame_in_buffer = 0; |
| 3718 | retval = special; |
| 3719 | goto out; |
| 3720 | } |
| 3721 | } |
| 3722 | |
| 3723 | /* Move the data from driver buffer to user buffer */ |
| 3724 | if ((STp->buffer)->buffer_bytes > 0) { |
| 3725 | #if DEBUG |
| 3726 | if (debugging && STps->eof != ST_NOEOF) |
| 3727 | printk(OSST_DEB_MSG "%s:D: EOF up (%d). Left %d, needed %d.\n", name, |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 3728 | STps->eof, (STp->buffer)->buffer_bytes, (int) (count - total)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3729 | #endif |
| 3730 | /* force multiple of block size, note block_size may have been adjusted */ |
| 3731 | transfer = (((STp->buffer)->buffer_bytes < count - total ? |
| 3732 | (STp->buffer)->buffer_bytes : count - total)/ |
| 3733 | STp->block_size) * STp->block_size; |
| 3734 | |
| 3735 | if (transfer == 0) { |
| 3736 | printk(KERN_WARNING |
| 3737 | "%s:W: Nothing can be transfered, requested %Zd, tape block size (%d%c).\n", |
| 3738 | name, count, STp->block_size < 1024? |
| 3739 | STp->block_size:STp->block_size/1024, |
| 3740 | STp->block_size<1024?'b':'k'); |
| 3741 | break; |
| 3742 | } |
| 3743 | i = from_buffer(STp->buffer, buf, transfer); |
| 3744 | if (i) { |
| 3745 | retval = i; |
| 3746 | goto out; |
| 3747 | } |
| 3748 | STp->logical_blk_num += transfer / STp->block_size; |
| 3749 | STps->drv_block += transfer / STp->block_size; |
| 3750 | filp->f_pos += transfer; |
| 3751 | buf += transfer; |
| 3752 | total += transfer; |
| 3753 | } |
| 3754 | |
| 3755 | if ((STp->buffer)->buffer_bytes == 0) { |
| 3756 | #if DEBUG |
| 3757 | if (debugging) |
| 3758 | printk(OSST_DEB_MSG "%s:D: Finished with frame %d\n", |
| 3759 | name, STp->frame_seq_number); |
| 3760 | #endif |
| 3761 | STp->frame_in_buffer = 0; |
| 3762 | STp->frame_seq_number++; /* frame to look for next time */ |
| 3763 | } |
| 3764 | } /* for (total = 0, special = 0; total < count && !special; ) */ |
| 3765 | |
| 3766 | /* Change the eof state if no data from tape or buffer */ |
| 3767 | if (total == 0) { |
| 3768 | if (STps->eof == ST_FM_HIT) { |
| 3769 | STps->eof = (STp->first_frame_position >= STp->eod_frame_ppos)?ST_EOD_2:ST_FM; |
| 3770 | STps->drv_block = 0; |
| 3771 | if (STps->drv_file >= 0) |
| 3772 | STps->drv_file++; |
| 3773 | } |
| 3774 | else if (STps->eof == ST_EOD_1) { |
| 3775 | STps->eof = ST_EOD_2; |
| 3776 | if (STps->drv_block > 0 && STps->drv_file >= 0) |
| 3777 | STps->drv_file++; |
| 3778 | STps->drv_block = 0; |
| 3779 | } |
| 3780 | else if (STps->eof == ST_EOD_2) |
| 3781 | STps->eof = ST_EOD; |
| 3782 | } |
| 3783 | else if (STps->eof == ST_FM) |
| 3784 | STps->eof = ST_NOEOF; |
| 3785 | |
| 3786 | retval = total; |
| 3787 | |
| 3788 | out: |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 3789 | if (SRpnt != NULL) osst_release_request(SRpnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3790 | |
Matthias Kaehlcke | 4390e60 | 2007-08-10 14:50:44 -0700 | [diff] [blame] | 3791 | mutex_unlock(&STp->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3792 | |
| 3793 | return retval; |
| 3794 | } |
| 3795 | |
| 3796 | |
| 3797 | /* Set the driver options */ |
| 3798 | static void osst_log_options(struct osst_tape *STp, struct st_modedef *STm, char *name) |
| 3799 | { |
| 3800 | printk(KERN_INFO |
| 3801 | "%s:I: Mode %d options: buffer writes: %d, async writes: %d, read ahead: %d\n", |
| 3802 | name, STp->current_mode, STm->do_buffer_writes, STm->do_async_writes, |
| 3803 | STm->do_read_ahead); |
| 3804 | printk(KERN_INFO |
| 3805 | "%s:I: can bsr: %d, two FMs: %d, fast mteom: %d, auto lock: %d,\n", |
| 3806 | name, STp->can_bsr, STp->two_fm, STp->fast_mteom, STp->do_auto_lock); |
| 3807 | printk(KERN_INFO |
| 3808 | "%s:I: defs for wr: %d, no block limits: %d, partitions: %d, s2 log: %d\n", |
| 3809 | name, STm->defaults_for_writes, STp->omit_blklims, STp->can_partitions, |
| 3810 | STp->scsi2_logical); |
| 3811 | printk(KERN_INFO |
| 3812 | "%s:I: sysv: %d\n", name, STm->sysv); |
| 3813 | #if DEBUG |
| 3814 | printk(KERN_INFO |
| 3815 | "%s:D: debugging: %d\n", |
| 3816 | name, debugging); |
| 3817 | #endif |
| 3818 | } |
| 3819 | |
| 3820 | |
| 3821 | static int osst_set_options(struct osst_tape *STp, long options) |
| 3822 | { |
| 3823 | int value; |
| 3824 | long code; |
| 3825 | struct st_modedef * STm; |
| 3826 | char * name = tape_name(STp); |
| 3827 | |
| 3828 | STm = &(STp->modes[STp->current_mode]); |
| 3829 | if (!STm->defined) { |
| 3830 | memcpy(STm, &(STp->modes[0]), sizeof(*STm)); |
| 3831 | modes_defined = 1; |
| 3832 | #if DEBUG |
| 3833 | if (debugging) |
| 3834 | printk(OSST_DEB_MSG "%s:D: Initialized mode %d definition from mode 0\n", |
| 3835 | name, STp->current_mode); |
| 3836 | #endif |
| 3837 | } |
| 3838 | |
| 3839 | code = options & MT_ST_OPTIONS; |
| 3840 | if (code == MT_ST_BOOLEANS) { |
| 3841 | STm->do_buffer_writes = (options & MT_ST_BUFFER_WRITES) != 0; |
| 3842 | STm->do_async_writes = (options & MT_ST_ASYNC_WRITES) != 0; |
| 3843 | STm->defaults_for_writes = (options & MT_ST_DEF_WRITES) != 0; |
| 3844 | STm->do_read_ahead = (options & MT_ST_READ_AHEAD) != 0; |
| 3845 | STp->two_fm = (options & MT_ST_TWO_FM) != 0; |
| 3846 | STp->fast_mteom = (options & MT_ST_FAST_MTEOM) != 0; |
| 3847 | STp->do_auto_lock = (options & MT_ST_AUTO_LOCK) != 0; |
| 3848 | STp->can_bsr = (options & MT_ST_CAN_BSR) != 0; |
| 3849 | STp->omit_blklims = (options & MT_ST_NO_BLKLIMS) != 0; |
| 3850 | if ((STp->device)->scsi_level >= SCSI_2) |
| 3851 | STp->can_partitions = (options & MT_ST_CAN_PARTITIONS) != 0; |
| 3852 | STp->scsi2_logical = (options & MT_ST_SCSI2LOGICAL) != 0; |
| 3853 | STm->sysv = (options & MT_ST_SYSV) != 0; |
| 3854 | #if DEBUG |
| 3855 | debugging = (options & MT_ST_DEBUGGING) != 0; |
| 3856 | #endif |
| 3857 | osst_log_options(STp, STm, name); |
| 3858 | } |
| 3859 | else if (code == MT_ST_SETBOOLEANS || code == MT_ST_CLEARBOOLEANS) { |
| 3860 | value = (code == MT_ST_SETBOOLEANS); |
| 3861 | if ((options & MT_ST_BUFFER_WRITES) != 0) |
| 3862 | STm->do_buffer_writes = value; |
| 3863 | if ((options & MT_ST_ASYNC_WRITES) != 0) |
| 3864 | STm->do_async_writes = value; |
| 3865 | if ((options & MT_ST_DEF_WRITES) != 0) |
| 3866 | STm->defaults_for_writes = value; |
| 3867 | if ((options & MT_ST_READ_AHEAD) != 0) |
| 3868 | STm->do_read_ahead = value; |
| 3869 | if ((options & MT_ST_TWO_FM) != 0) |
| 3870 | STp->two_fm = value; |
| 3871 | if ((options & MT_ST_FAST_MTEOM) != 0) |
| 3872 | STp->fast_mteom = value; |
| 3873 | if ((options & MT_ST_AUTO_LOCK) != 0) |
| 3874 | STp->do_auto_lock = value; |
| 3875 | if ((options & MT_ST_CAN_BSR) != 0) |
| 3876 | STp->can_bsr = value; |
| 3877 | if ((options & MT_ST_NO_BLKLIMS) != 0) |
| 3878 | STp->omit_blklims = value; |
| 3879 | if ((STp->device)->scsi_level >= SCSI_2 && |
| 3880 | (options & MT_ST_CAN_PARTITIONS) != 0) |
| 3881 | STp->can_partitions = value; |
| 3882 | if ((options & MT_ST_SCSI2LOGICAL) != 0) |
| 3883 | STp->scsi2_logical = value; |
| 3884 | if ((options & MT_ST_SYSV) != 0) |
| 3885 | STm->sysv = value; |
| 3886 | #if DEBUG |
| 3887 | if ((options & MT_ST_DEBUGGING) != 0) |
| 3888 | debugging = value; |
| 3889 | #endif |
| 3890 | osst_log_options(STp, STm, name); |
| 3891 | } |
| 3892 | else if (code == MT_ST_WRITE_THRESHOLD) { |
| 3893 | value = (options & ~MT_ST_OPTIONS) * ST_KILOBYTE; |
| 3894 | if (value < 1 || value > osst_buffer_size) { |
| 3895 | printk(KERN_WARNING "%s:W: Write threshold %d too small or too large.\n", |
| 3896 | name, value); |
| 3897 | return (-EIO); |
| 3898 | } |
| 3899 | STp->write_threshold = value; |
| 3900 | printk(KERN_INFO "%s:I: Write threshold set to %d bytes.\n", |
| 3901 | name, value); |
| 3902 | } |
| 3903 | else if (code == MT_ST_DEF_BLKSIZE) { |
| 3904 | value = (options & ~MT_ST_OPTIONS); |
| 3905 | if (value == ~MT_ST_OPTIONS) { |
| 3906 | STm->default_blksize = (-1); |
| 3907 | printk(KERN_INFO "%s:I: Default block size disabled.\n", name); |
| 3908 | } |
| 3909 | else { |
| 3910 | if (value < 512 || value > OS_DATA_SIZE || OS_DATA_SIZE % value) { |
| 3911 | printk(KERN_WARNING "%s:W: Default block size cannot be set to %d.\n", |
| 3912 | name, value); |
| 3913 | return (-EINVAL); |
| 3914 | } |
| 3915 | STm->default_blksize = value; |
| 3916 | printk(KERN_INFO "%s:I: Default block size set to %d bytes.\n", |
| 3917 | name, STm->default_blksize); |
| 3918 | } |
| 3919 | } |
| 3920 | else if (code == MT_ST_TIMEOUTS) { |
| 3921 | value = (options & ~MT_ST_OPTIONS); |
| 3922 | if ((value & MT_ST_SET_LONG_TIMEOUT) != 0) { |
| 3923 | STp->long_timeout = (value & ~MT_ST_SET_LONG_TIMEOUT) * HZ; |
| 3924 | printk(KERN_INFO "%s:I: Long timeout set to %d seconds.\n", name, |
| 3925 | (value & ~MT_ST_SET_LONG_TIMEOUT)); |
| 3926 | } |
| 3927 | else { |
| 3928 | STp->timeout = value * HZ; |
| 3929 | printk(KERN_INFO "%s:I: Normal timeout set to %d seconds.\n", name, value); |
| 3930 | } |
| 3931 | } |
| 3932 | else if (code == MT_ST_DEF_OPTIONS) { |
| 3933 | code = (options & ~MT_ST_CLEAR_DEFAULT); |
| 3934 | value = (options & MT_ST_CLEAR_DEFAULT); |
| 3935 | if (code == MT_ST_DEF_DENSITY) { |
| 3936 | if (value == MT_ST_CLEAR_DEFAULT) { |
| 3937 | STm->default_density = (-1); |
| 3938 | printk(KERN_INFO "%s:I: Density default disabled.\n", name); |
| 3939 | } |
| 3940 | else { |
| 3941 | STm->default_density = value & 0xff; |
| 3942 | printk(KERN_INFO "%s:I: Density default set to %x\n", |
| 3943 | name, STm->default_density); |
| 3944 | } |
| 3945 | } |
| 3946 | else if (code == MT_ST_DEF_DRVBUFFER) { |
| 3947 | if (value == MT_ST_CLEAR_DEFAULT) { |
| 3948 | STp->default_drvbuffer = 0xff; |
| 3949 | printk(KERN_INFO "%s:I: Drive buffer default disabled.\n", name); |
| 3950 | } |
| 3951 | else { |
| 3952 | STp->default_drvbuffer = value & 7; |
| 3953 | printk(KERN_INFO "%s:I: Drive buffer default set to %x\n", |
| 3954 | name, STp->default_drvbuffer); |
| 3955 | } |
| 3956 | } |
| 3957 | else if (code == MT_ST_DEF_COMPRESSION) { |
| 3958 | if (value == MT_ST_CLEAR_DEFAULT) { |
| 3959 | STm->default_compression = ST_DONT_TOUCH; |
| 3960 | printk(KERN_INFO "%s:I: Compression default disabled.\n", name); |
| 3961 | } |
| 3962 | else { |
| 3963 | STm->default_compression = (value & 1 ? ST_YES : ST_NO); |
| 3964 | printk(KERN_INFO "%s:I: Compression default set to %x\n", |
| 3965 | name, (value & 1)); |
| 3966 | } |
| 3967 | } |
| 3968 | } |
| 3969 | else |
| 3970 | return (-EIO); |
| 3971 | |
| 3972 | return 0; |
| 3973 | } |
| 3974 | |
| 3975 | |
| 3976 | /* Internal ioctl function */ |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 3977 | static int osst_int_ioctl(struct osst_tape * STp, struct osst_request ** aSRpnt, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3978 | unsigned int cmd_in, unsigned long arg) |
| 3979 | { |
| 3980 | int timeout; |
| 3981 | long ltmp; |
| 3982 | int i, ioctl_result; |
| 3983 | int chg_eof = 1; |
| 3984 | unsigned char cmd[MAX_COMMAND_SIZE]; |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 3985 | struct osst_request * SRpnt = * aSRpnt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3986 | struct st_partstat * STps; |
| 3987 | int fileno, blkno, at_sm, frame_seq_numbr, logical_blk_num; |
| 3988 | int datalen = 0, direction = DMA_NONE; |
| 3989 | char * name = tape_name(STp); |
| 3990 | |
| 3991 | if (STp->ready != ST_READY && cmd_in != MTLOAD) { |
| 3992 | if (STp->ready == ST_NO_TAPE) |
| 3993 | return (-ENOMEDIUM); |
| 3994 | else |
| 3995 | return (-EIO); |
| 3996 | } |
| 3997 | timeout = STp->long_timeout; |
| 3998 | STps = &(STp->ps[STp->partition]); |
| 3999 | fileno = STps->drv_file; |
| 4000 | blkno = STps->drv_block; |
| 4001 | at_sm = STps->at_sm; |
| 4002 | frame_seq_numbr = STp->frame_seq_number; |
| 4003 | logical_blk_num = STp->logical_blk_num; |
| 4004 | |
| 4005 | memset(cmd, 0, MAX_COMMAND_SIZE); |
| 4006 | switch (cmd_in) { |
| 4007 | case MTFSFM: |
| 4008 | chg_eof = 0; /* Changed from the FSF after this */ |
| 4009 | case MTFSF: |
| 4010 | if (STp->raw) |
| 4011 | return (-EIO); |
| 4012 | if (STp->linux_media) |
| 4013 | ioctl_result = osst_space_over_filemarks_forward_fast(STp, &SRpnt, cmd_in, arg); |
| 4014 | else |
| 4015 | ioctl_result = osst_space_over_filemarks_forward_slow(STp, &SRpnt, cmd_in, arg); |
| 4016 | if (fileno >= 0) |
| 4017 | fileno += arg; |
| 4018 | blkno = 0; |
| 4019 | at_sm &= (arg == 0); |
| 4020 | goto os_bypass; |
| 4021 | |
| 4022 | case MTBSF: |
| 4023 | chg_eof = 0; /* Changed from the FSF after this */ |
| 4024 | case MTBSFM: |
| 4025 | if (STp->raw) |
| 4026 | return (-EIO); |
| 4027 | ioctl_result = osst_space_over_filemarks_backward(STp, &SRpnt, cmd_in, arg); |
| 4028 | if (fileno >= 0) |
| 4029 | fileno -= arg; |
| 4030 | blkno = (-1); /* We can't know the block number */ |
| 4031 | at_sm &= (arg == 0); |
| 4032 | goto os_bypass; |
| 4033 | |
| 4034 | case MTFSR: |
| 4035 | case MTBSR: |
| 4036 | #if DEBUG |
| 4037 | if (debugging) |
| 4038 | printk(OSST_DEB_MSG "%s:D: Skipping %lu blocks %s from logical block %d\n", |
| 4039 | name, arg, cmd_in==MTFSR?"forward":"backward", logical_blk_num); |
| 4040 | #endif |
| 4041 | if (cmd_in == MTFSR) { |
| 4042 | logical_blk_num += arg; |
| 4043 | if (blkno >= 0) blkno += arg; |
| 4044 | } |
| 4045 | else { |
| 4046 | logical_blk_num -= arg; |
| 4047 | if (blkno >= 0) blkno -= arg; |
| 4048 | } |
| 4049 | ioctl_result = osst_seek_logical_blk(STp, &SRpnt, logical_blk_num); |
| 4050 | fileno = STps->drv_file; |
| 4051 | blkno = STps->drv_block; |
| 4052 | at_sm &= (arg == 0); |
| 4053 | goto os_bypass; |
| 4054 | |
| 4055 | case MTFSS: |
| 4056 | cmd[0] = SPACE; |
| 4057 | cmd[1] = 0x04; /* Space Setmarks */ /* FIXME -- OS can't do this? */ |
| 4058 | cmd[2] = (arg >> 16); |
| 4059 | cmd[3] = (arg >> 8); |
| 4060 | cmd[4] = arg; |
| 4061 | #if DEBUG |
| 4062 | if (debugging) |
| 4063 | printk(OSST_DEB_MSG "%s:D: Spacing tape forward %d setmarks.\n", name, |
| 4064 | cmd[2] * 65536 + cmd[3] * 256 + cmd[4]); |
| 4065 | #endif |
| 4066 | if (arg != 0) { |
| 4067 | blkno = fileno = (-1); |
| 4068 | at_sm = 1; |
| 4069 | } |
| 4070 | break; |
| 4071 | case MTBSS: |
| 4072 | cmd[0] = SPACE; |
| 4073 | cmd[1] = 0x04; /* Space Setmarks */ /* FIXME -- OS can't do this? */ |
| 4074 | ltmp = (-arg); |
| 4075 | cmd[2] = (ltmp >> 16); |
| 4076 | cmd[3] = (ltmp >> 8); |
| 4077 | cmd[4] = ltmp; |
| 4078 | #if DEBUG |
| 4079 | if (debugging) { |
| 4080 | if (cmd[2] & 0x80) |
| 4081 | ltmp = 0xff000000; |
| 4082 | ltmp = ltmp | (cmd[2] << 16) | (cmd[3] << 8) | cmd[4]; |
| 4083 | printk(OSST_DEB_MSG "%s:D: Spacing tape backward %ld setmarks.\n", |
| 4084 | name, (-ltmp)); |
| 4085 | } |
| 4086 | #endif |
| 4087 | if (arg != 0) { |
| 4088 | blkno = fileno = (-1); |
| 4089 | at_sm = 1; |
| 4090 | } |
| 4091 | break; |
| 4092 | case MTWEOF: |
| 4093 | if ((STps->rw == ST_WRITING || STp->dirty) && !STp->pos_unknown) { |
| 4094 | STp->write_type = OS_WRITE_DATA; |
| 4095 | ioctl_result = osst_flush_write_buffer(STp, &SRpnt); |
| 4096 | } else |
| 4097 | ioctl_result = 0; |
| 4098 | #if DEBUG |
| 4099 | if (debugging) |
| 4100 | printk(OSST_DEB_MSG "%s:D: Writing %ld filemark(s).\n", name, arg); |
| 4101 | #endif |
| 4102 | for (i=0; i<arg; i++) |
| 4103 | ioctl_result |= osst_write_filemark(STp, &SRpnt); |
| 4104 | if (fileno >= 0) fileno += arg; |
| 4105 | if (blkno >= 0) blkno = 0; |
| 4106 | goto os_bypass; |
| 4107 | |
| 4108 | case MTWSM: |
| 4109 | if (STp->write_prot) |
| 4110 | return (-EACCES); |
| 4111 | if (!STp->raw) |
| 4112 | return 0; |
| 4113 | cmd[0] = WRITE_FILEMARKS; /* FIXME -- need OS version */ |
| 4114 | if (cmd_in == MTWSM) |
| 4115 | cmd[1] = 2; |
| 4116 | cmd[2] = (arg >> 16); |
| 4117 | cmd[3] = (arg >> 8); |
| 4118 | cmd[4] = arg; |
| 4119 | timeout = STp->timeout; |
| 4120 | #if DEBUG |
| 4121 | if (debugging) |
| 4122 | printk(OSST_DEB_MSG "%s:D: Writing %d setmark(s).\n", name, |
| 4123 | cmd[2] * 65536 + cmd[3] * 256 + cmd[4]); |
| 4124 | #endif |
| 4125 | if (fileno >= 0) |
| 4126 | fileno += arg; |
| 4127 | blkno = 0; |
| 4128 | at_sm = (cmd_in == MTWSM); |
| 4129 | break; |
| 4130 | case MTOFFL: |
| 4131 | case MTLOAD: |
| 4132 | case MTUNLOAD: |
| 4133 | case MTRETEN: |
| 4134 | cmd[0] = START_STOP; |
| 4135 | cmd[1] = 1; /* Don't wait for completion */ |
| 4136 | if (cmd_in == MTLOAD) { |
| 4137 | if (STp->ready == ST_NO_TAPE) |
| 4138 | cmd[4] = 4; /* open tray */ |
| 4139 | else |
| 4140 | cmd[4] = 1; /* load */ |
| 4141 | } |
| 4142 | if (cmd_in == MTRETEN) |
| 4143 | cmd[4] = 3; /* retension then mount */ |
| 4144 | if (cmd_in == MTOFFL) |
| 4145 | cmd[4] = 4; /* rewind then eject */ |
| 4146 | timeout = STp->timeout; |
| 4147 | #if DEBUG |
| 4148 | if (debugging) { |
| 4149 | switch (cmd_in) { |
| 4150 | case MTUNLOAD: |
| 4151 | printk(OSST_DEB_MSG "%s:D: Unloading tape.\n", name); |
| 4152 | break; |
| 4153 | case MTLOAD: |
| 4154 | printk(OSST_DEB_MSG "%s:D: Loading tape.\n", name); |
| 4155 | break; |
| 4156 | case MTRETEN: |
| 4157 | printk(OSST_DEB_MSG "%s:D: Retensioning tape.\n", name); |
| 4158 | break; |
| 4159 | case MTOFFL: |
| 4160 | printk(OSST_DEB_MSG "%s:D: Ejecting tape.\n", name); |
| 4161 | break; |
| 4162 | } |
| 4163 | } |
| 4164 | #endif |
| 4165 | fileno = blkno = at_sm = frame_seq_numbr = logical_blk_num = 0 ; |
| 4166 | break; |
| 4167 | case MTNOP: |
| 4168 | #if DEBUG |
| 4169 | if (debugging) |
| 4170 | printk(OSST_DEB_MSG "%s:D: No-op on tape.\n", name); |
| 4171 | #endif |
| 4172 | return 0; /* Should do something ? */ |
| 4173 | break; |
| 4174 | case MTEOM: |
| 4175 | #if DEBUG |
| 4176 | if (debugging) |
| 4177 | printk(OSST_DEB_MSG "%s:D: Spacing to end of recorded medium.\n", name); |
| 4178 | #endif |
| 4179 | if ((osst_position_tape_and_confirm(STp, &SRpnt, STp->eod_frame_ppos) < 0) || |
| 4180 | (osst_get_logical_frame(STp, &SRpnt, -1, 0) < 0)) { |
| 4181 | ioctl_result = -EIO; |
| 4182 | goto os_bypass; |
| 4183 | } |
| 4184 | if (STp->buffer->aux->frame_type != OS_FRAME_TYPE_EOD) { |
| 4185 | #if DEBUG |
| 4186 | printk(OSST_DEB_MSG "%s:D: No EOD frame found where expected.\n", name); |
| 4187 | #endif |
| 4188 | ioctl_result = -EIO; |
| 4189 | goto os_bypass; |
| 4190 | } |
| 4191 | ioctl_result = osst_set_frame_position(STp, &SRpnt, STp->eod_frame_ppos, 0); |
| 4192 | fileno = STp->filemark_cnt; |
| 4193 | blkno = at_sm = 0; |
| 4194 | goto os_bypass; |
| 4195 | |
| 4196 | case MTERASE: |
| 4197 | if (STp->write_prot) |
| 4198 | return (-EACCES); |
| 4199 | ioctl_result = osst_reset_header(STp, &SRpnt); |
| 4200 | i = osst_write_eod(STp, &SRpnt); |
| 4201 | if (i < ioctl_result) ioctl_result = i; |
| 4202 | i = osst_position_tape_and_confirm(STp, &SRpnt, STp->eod_frame_ppos); |
| 4203 | if (i < ioctl_result) ioctl_result = i; |
| 4204 | fileno = blkno = at_sm = 0 ; |
| 4205 | goto os_bypass; |
| 4206 | |
| 4207 | case MTREW: |
| 4208 | cmd[0] = REZERO_UNIT; /* rewind */ |
| 4209 | cmd[1] = 1; |
| 4210 | #if DEBUG |
| 4211 | if (debugging) |
| 4212 | printk(OSST_DEB_MSG "%s:D: Rewinding tape, Immed=%d.\n", name, cmd[1]); |
| 4213 | #endif |
| 4214 | fileno = blkno = at_sm = frame_seq_numbr = logical_blk_num = 0 ; |
| 4215 | break; |
| 4216 | |
| 4217 | case MTSETBLK: /* Set block length */ |
| 4218 | if ((STps->drv_block == 0 ) && |
| 4219 | !STp->dirty && |
| 4220 | ((STp->buffer)->buffer_bytes == 0) && |
| 4221 | ((arg & MT_ST_BLKSIZE_MASK) >= 512 ) && |
| 4222 | ((arg & MT_ST_BLKSIZE_MASK) <= OS_DATA_SIZE) && |
| 4223 | !(OS_DATA_SIZE % (arg & MT_ST_BLKSIZE_MASK)) ) { |
| 4224 | /* |
| 4225 | * Only allowed to change the block size if you opened the |
| 4226 | * device at the beginning of a file before writing anything. |
| 4227 | * Note, that when reading, changing block_size is futile, |
| 4228 | * as the size used when writing overrides it. |
| 4229 | */ |
| 4230 | STp->block_size = (arg & MT_ST_BLKSIZE_MASK); |
| 4231 | printk(KERN_INFO "%s:I: Block size set to %d bytes.\n", |
| 4232 | name, STp->block_size); |
| 4233 | return 0; |
| 4234 | } |
| 4235 | case MTSETDENSITY: /* Set tape density */ |
| 4236 | case MTSETDRVBUFFER: /* Set drive buffering */ |
| 4237 | case SET_DENS_AND_BLK: /* Set density and block size */ |
| 4238 | chg_eof = 0; |
| 4239 | if (STp->dirty || (STp->buffer)->buffer_bytes != 0) |
| 4240 | return (-EIO); /* Not allowed if data in buffer */ |
| 4241 | if ((cmd_in == MTSETBLK || cmd_in == SET_DENS_AND_BLK) && |
| 4242 | (arg & MT_ST_BLKSIZE_MASK) != 0 && |
| 4243 | (arg & MT_ST_BLKSIZE_MASK) != STp->block_size ) { |
| 4244 | printk(KERN_WARNING "%s:W: Illegal to set block size to %d%s.\n", |
| 4245 | name, (int)(arg & MT_ST_BLKSIZE_MASK), |
| 4246 | (OS_DATA_SIZE % (arg & MT_ST_BLKSIZE_MASK))?"":" now"); |
| 4247 | return (-EINVAL); |
| 4248 | } |
| 4249 | return 0; /* FIXME silently ignore if block size didn't change */ |
| 4250 | |
| 4251 | default: |
| 4252 | return (-ENOSYS); |
| 4253 | } |
| 4254 | |
| 4255 | SRpnt = osst_do_scsi(SRpnt, STp, cmd, datalen, direction, timeout, MAX_RETRIES, 1); |
| 4256 | |
| 4257 | ioctl_result = (STp->buffer)->syscall_result; |
| 4258 | |
| 4259 | if (!SRpnt) { |
| 4260 | #if DEBUG |
| 4261 | printk(OSST_DEB_MSG "%s:D: Couldn't exec scsi cmd for IOCTL\n", name); |
| 4262 | #endif |
| 4263 | return ioctl_result; |
| 4264 | } |
| 4265 | |
| 4266 | if (!ioctl_result) { /* SCSI command successful */ |
| 4267 | STp->frame_seq_number = frame_seq_numbr; |
| 4268 | STp->logical_blk_num = logical_blk_num; |
| 4269 | } |
| 4270 | |
| 4271 | os_bypass: |
| 4272 | #if DEBUG |
| 4273 | if (debugging) |
| 4274 | printk(OSST_DEB_MSG "%s:D: IOCTL (%d) Result=%d\n", name, cmd_in, ioctl_result); |
| 4275 | #endif |
| 4276 | |
| 4277 | if (!ioctl_result) { /* success */ |
| 4278 | |
| 4279 | if (cmd_in == MTFSFM) { |
| 4280 | fileno--; |
| 4281 | blkno--; |
| 4282 | } |
| 4283 | if (cmd_in == MTBSFM) { |
| 4284 | fileno++; |
| 4285 | blkno++; |
| 4286 | } |
| 4287 | STps->drv_block = blkno; |
| 4288 | STps->drv_file = fileno; |
| 4289 | STps->at_sm = at_sm; |
| 4290 | |
| 4291 | if (cmd_in == MTEOM) |
| 4292 | STps->eof = ST_EOD; |
| 4293 | else if ((cmd_in == MTFSFM || cmd_in == MTBSF) && STps->eof == ST_FM_HIT) { |
| 4294 | ioctl_result = osst_seek_logical_blk(STp, &SRpnt, STp->logical_blk_num-1); |
| 4295 | STps->drv_block++; |
| 4296 | STp->logical_blk_num++; |
| 4297 | STp->frame_seq_number++; |
| 4298 | STp->frame_in_buffer = 0; |
| 4299 | STp->buffer->read_pointer = 0; |
| 4300 | } |
| 4301 | else if (cmd_in == MTFSF) |
| 4302 | STps->eof = (STp->first_frame_position >= STp->eod_frame_ppos)?ST_EOD:ST_FM; |
| 4303 | else if (chg_eof) |
| 4304 | STps->eof = ST_NOEOF; |
| 4305 | |
| 4306 | if (cmd_in == MTOFFL || cmd_in == MTUNLOAD) |
| 4307 | STp->rew_at_close = 0; |
| 4308 | else if (cmd_in == MTLOAD) { |
| 4309 | for (i=0; i < ST_NBR_PARTITIONS; i++) { |
| 4310 | STp->ps[i].rw = ST_IDLE; |
| 4311 | STp->ps[i].last_block_valid = 0;/* FIXME - where else is this field maintained? */ |
| 4312 | } |
| 4313 | STp->partition = 0; |
| 4314 | } |
| 4315 | |
| 4316 | if (cmd_in == MTREW) { |
| 4317 | ioctl_result = osst_position_tape_and_confirm(STp, &SRpnt, STp->first_data_ppos); |
| 4318 | if (ioctl_result > 0) |
| 4319 | ioctl_result = 0; |
| 4320 | } |
| 4321 | |
| 4322 | } else if (cmd_in == MTBSF || cmd_in == MTBSFM ) { |
| 4323 | if (osst_position_tape_and_confirm(STp, &SRpnt, STp->first_data_ppos) < 0) |
| 4324 | STps->drv_file = STps->drv_block = -1; |
| 4325 | else |
| 4326 | STps->drv_file = STps->drv_block = 0; |
| 4327 | STps->eof = ST_NOEOF; |
| 4328 | } else if (cmd_in == MTFSF || cmd_in == MTFSFM) { |
| 4329 | if (osst_position_tape_and_confirm(STp, &SRpnt, STp->eod_frame_ppos) < 0) |
| 4330 | STps->drv_file = STps->drv_block = -1; |
| 4331 | else { |
| 4332 | STps->drv_file = STp->filemark_cnt; |
| 4333 | STps->drv_block = 0; |
| 4334 | } |
| 4335 | STps->eof = ST_EOD; |
| 4336 | } else if (cmd_in == MTBSR || cmd_in == MTFSR || cmd_in == MTWEOF || cmd_in == MTEOM) { |
| 4337 | STps->drv_file = STps->drv_block = (-1); |
| 4338 | STps->eof = ST_NOEOF; |
| 4339 | STp->header_ok = 0; |
| 4340 | } else if (cmd_in == MTERASE) { |
| 4341 | STp->header_ok = 0; |
| 4342 | } else if (SRpnt) { /* SCSI command was not completely successful. */ |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 4343 | if (SRpnt->sense[2] & 0x40) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4344 | STps->eof = ST_EOM_OK; |
| 4345 | STps->drv_block = 0; |
| 4346 | } |
| 4347 | if (chg_eof) |
| 4348 | STps->eof = ST_NOEOF; |
| 4349 | |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 4350 | if ((SRpnt->sense[2] & 0x0f) == BLANK_CHECK) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4351 | STps->eof = ST_EOD; |
| 4352 | |
| 4353 | if (cmd_in == MTLOAD && osst_wait_for_medium(STp, &SRpnt, 60)) |
| 4354 | ioctl_result = osst_wait_ready(STp, &SRpnt, 5 * 60, OSST_WAIT_POSITION_COMPLETE); |
| 4355 | } |
| 4356 | *aSRpnt = SRpnt; |
| 4357 | |
| 4358 | return ioctl_result; |
| 4359 | } |
| 4360 | |
| 4361 | |
| 4362 | /* Open the device */ |
Jonathan Corbet | 647d87b | 2008-05-15 12:23:19 -0600 | [diff] [blame] | 4363 | static int __os_scsi_tape_open(struct inode * inode, struct file * filp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4364 | { |
| 4365 | unsigned short flags; |
| 4366 | int i, b_size, new_session = 0, retval = 0; |
| 4367 | unsigned char cmd[MAX_COMMAND_SIZE]; |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 4368 | struct osst_request * SRpnt = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4369 | struct osst_tape * STp; |
| 4370 | struct st_modedef * STm; |
| 4371 | struct st_partstat * STps; |
| 4372 | char * name; |
| 4373 | int dev = TAPE_NR(inode); |
| 4374 | int mode = TAPE_MODE(inode); |
| 4375 | |
| 4376 | /* |
| 4377 | * We really want to do nonseekable_open(inode, filp); here, but some |
| 4378 | * versions of tar incorrectly call lseek on tapes and bail out if that |
| 4379 | * fails. So we disallow pread() and pwrite(), but permit lseeks. |
| 4380 | */ |
| 4381 | filp->f_mode &= ~(FMODE_PREAD | FMODE_PWRITE); |
| 4382 | |
| 4383 | write_lock(&os_scsi_tapes_lock); |
| 4384 | if (dev >= osst_max_dev || os_scsi_tapes == NULL || |
| 4385 | (STp = os_scsi_tapes[dev]) == NULL || !STp->device) { |
| 4386 | write_unlock(&os_scsi_tapes_lock); |
| 4387 | return (-ENXIO); |
| 4388 | } |
| 4389 | |
| 4390 | name = tape_name(STp); |
| 4391 | |
| 4392 | if (STp->in_use) { |
| 4393 | write_unlock(&os_scsi_tapes_lock); |
| 4394 | #if DEBUG |
| 4395 | printk(OSST_DEB_MSG "%s:D: Device already in use.\n", name); |
| 4396 | #endif |
| 4397 | return (-EBUSY); |
| 4398 | } |
| 4399 | if (scsi_device_get(STp->device)) { |
| 4400 | write_unlock(&os_scsi_tapes_lock); |
| 4401 | #if DEBUG |
| 4402 | printk(OSST_DEB_MSG "%s:D: Failed scsi_device_get.\n", name); |
| 4403 | #endif |
| 4404 | return (-ENXIO); |
| 4405 | } |
| 4406 | filp->private_data = STp; |
| 4407 | STp->in_use = 1; |
| 4408 | write_unlock(&os_scsi_tapes_lock); |
| 4409 | STp->rew_at_close = TAPE_REWIND(inode); |
| 4410 | |
| 4411 | if( !scsi_block_when_processing_errors(STp->device) ) { |
| 4412 | return -ENXIO; |
| 4413 | } |
| 4414 | |
| 4415 | if (mode != STp->current_mode) { |
| 4416 | #if DEBUG |
| 4417 | if (debugging) |
| 4418 | printk(OSST_DEB_MSG "%s:D: Mode change from %d to %d.\n", |
| 4419 | name, STp->current_mode, mode); |
| 4420 | #endif |
| 4421 | new_session = 1; |
| 4422 | STp->current_mode = mode; |
| 4423 | } |
| 4424 | STm = &(STp->modes[STp->current_mode]); |
| 4425 | |
| 4426 | flags = filp->f_flags; |
| 4427 | STp->write_prot = ((flags & O_ACCMODE) == O_RDONLY); |
| 4428 | |
| 4429 | STp->raw = TAPE_IS_RAW(inode); |
| 4430 | if (STp->raw) |
| 4431 | STp->header_ok = 0; |
| 4432 | |
| 4433 | /* Allocate data segments for this device's tape buffer */ |
| 4434 | if (!enlarge_buffer(STp->buffer, STp->restr_dma)) { |
| 4435 | printk(KERN_ERR "%s:E: Unable to allocate memory segments for tape buffer.\n", name); |
| 4436 | retval = (-EOVERFLOW); |
| 4437 | goto err_out; |
| 4438 | } |
| 4439 | if (STp->buffer->buffer_size >= OS_FRAME_SIZE) { |
| 4440 | for (i = 0, b_size = 0; |
| 4441 | (i < STp->buffer->sg_segs) && ((b_size + STp->buffer->sg[i].length) <= OS_DATA_SIZE); |
| 4442 | b_size += STp->buffer->sg[i++].length); |
Jens Axboe | 45711f1 | 2007-10-22 21:19:53 +0200 | [diff] [blame] | 4443 | STp->buffer->aux = (os_aux_t *) (page_address(sg_page(&STp->buffer->sg[i])) + OS_DATA_SIZE - b_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4444 | #if DEBUG |
| 4445 | printk(OSST_DEB_MSG "%s:D: b_data points to %p in segment 0 at %p\n", name, |
| 4446 | STp->buffer->b_data, page_address(STp->buffer->sg[0].page)); |
| 4447 | printk(OSST_DEB_MSG "%s:D: AUX points to %p in segment %d at %p\n", name, |
| 4448 | STp->buffer->aux, i, page_address(STp->buffer->sg[i].page)); |
| 4449 | #endif |
| 4450 | } else { |
| 4451 | STp->buffer->aux = NULL; /* this had better never happen! */ |
| 4452 | printk(KERN_NOTICE "%s:A: Framesize %d too large for buffer.\n", name, OS_FRAME_SIZE); |
| 4453 | retval = (-EIO); |
| 4454 | goto err_out; |
| 4455 | } |
| 4456 | STp->buffer->writing = 0; |
| 4457 | STp->buffer->syscall_result = 0; |
| 4458 | STp->dirty = 0; |
| 4459 | for (i=0; i < ST_NBR_PARTITIONS; i++) { |
| 4460 | STps = &(STp->ps[i]); |
| 4461 | STps->rw = ST_IDLE; |
| 4462 | } |
| 4463 | STp->ready = ST_READY; |
| 4464 | #if DEBUG |
| 4465 | STp->nbr_waits = STp->nbr_finished = 0; |
| 4466 | #endif |
| 4467 | |
| 4468 | memset (cmd, 0, MAX_COMMAND_SIZE); |
| 4469 | cmd[0] = TEST_UNIT_READY; |
| 4470 | |
| 4471 | SRpnt = osst_do_scsi(NULL, STp, cmd, 0, DMA_NONE, STp->timeout, MAX_RETRIES, 1); |
| 4472 | if (!SRpnt) { |
| 4473 | retval = (STp->buffer)->syscall_result; /* FIXME - valid? */ |
| 4474 | goto err_out; |
| 4475 | } |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 4476 | if ((SRpnt->sense[0] & 0x70) == 0x70 && |
| 4477 | (SRpnt->sense[2] & 0x0f) == NOT_READY && |
| 4478 | SRpnt->sense[12] == 4 ) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4479 | #if DEBUG |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 4480 | printk(OSST_DEB_MSG "%s:D: Unit not ready, cause %x\n", name, SRpnt->sense[13]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4481 | #endif |
| 4482 | if (filp->f_flags & O_NONBLOCK) { |
| 4483 | retval = -EAGAIN; |
| 4484 | goto err_out; |
| 4485 | } |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 4486 | if (SRpnt->sense[13] == 2) { /* initialize command required (LOAD) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4487 | memset (cmd, 0, MAX_COMMAND_SIZE); |
| 4488 | cmd[0] = START_STOP; |
| 4489 | cmd[1] = 1; |
| 4490 | cmd[4] = 1; |
| 4491 | SRpnt = osst_do_scsi(SRpnt, STp, cmd, 0, DMA_NONE, |
| 4492 | STp->timeout, MAX_RETRIES, 1); |
| 4493 | } |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 4494 | osst_wait_ready(STp, &SRpnt, (SRpnt->sense[13]==1?15:3) * 60, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4495 | } |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 4496 | if ((SRpnt->sense[0] & 0x70) == 0x70 && |
| 4497 | (SRpnt->sense[2] & 0x0f) == UNIT_ATTENTION) { /* New media? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4498 | #if DEBUG |
| 4499 | printk(OSST_DEB_MSG "%s:D: Unit wants attention\n", name); |
| 4500 | #endif |
| 4501 | STp->header_ok = 0; |
| 4502 | |
| 4503 | for (i=0; i < 10; i++) { |
| 4504 | |
| 4505 | memset (cmd, 0, MAX_COMMAND_SIZE); |
| 4506 | cmd[0] = TEST_UNIT_READY; |
| 4507 | |
| 4508 | SRpnt = osst_do_scsi(SRpnt, STp, cmd, 0, DMA_NONE, |
| 4509 | STp->timeout, MAX_RETRIES, 1); |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 4510 | if ((SRpnt->sense[0] & 0x70) != 0x70 || |
| 4511 | (SRpnt->sense[2] & 0x0f) != UNIT_ATTENTION) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4512 | break; |
| 4513 | } |
| 4514 | |
| 4515 | STp->pos_unknown = 0; |
| 4516 | STp->partition = STp->new_partition = 0; |
| 4517 | if (STp->can_partitions) |
| 4518 | STp->nbr_partitions = 1; /* This guess will be updated later if necessary */ |
| 4519 | for (i=0; i < ST_NBR_PARTITIONS; i++) { |
| 4520 | STps = &(STp->ps[i]); |
| 4521 | STps->rw = ST_IDLE; /* FIXME - seems to be redundant... */ |
| 4522 | STps->eof = ST_NOEOF; |
| 4523 | STps->at_sm = 0; |
| 4524 | STps->last_block_valid = 0; |
| 4525 | STps->drv_block = 0; |
| 4526 | STps->drv_file = 0 ; |
| 4527 | } |
| 4528 | new_session = 1; |
| 4529 | STp->recover_count = 0; |
| 4530 | STp->abort_count = 0; |
| 4531 | } |
| 4532 | /* |
| 4533 | * if we have valid headers from before, and the drive/tape seem untouched, |
| 4534 | * open without reconfiguring and re-reading the headers |
| 4535 | */ |
| 4536 | if (!STp->buffer->syscall_result && STp->header_ok && |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 4537 | !SRpnt->result && SRpnt->sense[0] == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4538 | |
| 4539 | memset(cmd, 0, MAX_COMMAND_SIZE); |
| 4540 | cmd[0] = MODE_SENSE; |
| 4541 | cmd[1] = 8; |
| 4542 | cmd[2] = VENDOR_IDENT_PAGE; |
| 4543 | cmd[4] = VENDOR_IDENT_PAGE_LENGTH + MODE_HEADER_LENGTH; |
| 4544 | |
| 4545 | SRpnt = osst_do_scsi(SRpnt, STp, cmd, cmd[4], DMA_FROM_DEVICE, STp->timeout, 0, 1); |
| 4546 | |
| 4547 | if (STp->buffer->syscall_result || |
| 4548 | STp->buffer->b_data[MODE_HEADER_LENGTH + 2] != 'L' || |
| 4549 | STp->buffer->b_data[MODE_HEADER_LENGTH + 3] != 'I' || |
| 4550 | STp->buffer->b_data[MODE_HEADER_LENGTH + 4] != 'N' || |
| 4551 | STp->buffer->b_data[MODE_HEADER_LENGTH + 5] != '4' ) { |
| 4552 | #if DEBUG |
| 4553 | printk(OSST_DEB_MSG "%s:D: Signature was changed to %c%c%c%c\n", name, |
| 4554 | STp->buffer->b_data[MODE_HEADER_LENGTH + 2], |
| 4555 | STp->buffer->b_data[MODE_HEADER_LENGTH + 3], |
| 4556 | STp->buffer->b_data[MODE_HEADER_LENGTH + 4], |
| 4557 | STp->buffer->b_data[MODE_HEADER_LENGTH + 5]); |
| 4558 | #endif |
| 4559 | STp->header_ok = 0; |
| 4560 | } |
| 4561 | i = STp->first_frame_position; |
| 4562 | if (STp->header_ok && i == osst_get_frame_position(STp, &SRpnt)) { |
| 4563 | if (STp->door_locked == ST_UNLOCKED) { |
| 4564 | if (do_door_lock(STp, 1)) |
| 4565 | printk(KERN_INFO "%s:I: Can't lock drive door\n", name); |
| 4566 | else |
| 4567 | STp->door_locked = ST_LOCKED_AUTO; |
| 4568 | } |
| 4569 | if (!STp->frame_in_buffer) { |
| 4570 | STp->block_size = (STm->default_blksize > 0) ? |
| 4571 | STm->default_blksize : OS_DATA_SIZE; |
| 4572 | STp->buffer->buffer_bytes = STp->buffer->read_pointer = 0; |
| 4573 | } |
| 4574 | STp->buffer->buffer_blocks = OS_DATA_SIZE / STp->block_size; |
| 4575 | STp->fast_open = 1; |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 4576 | osst_release_request(SRpnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4577 | return 0; |
| 4578 | } |
| 4579 | #if DEBUG |
| 4580 | if (i != STp->first_frame_position) |
| 4581 | printk(OSST_DEB_MSG "%s:D: Tape position changed from %d to %d\n", |
| 4582 | name, i, STp->first_frame_position); |
| 4583 | #endif |
| 4584 | STp->header_ok = 0; |
| 4585 | } |
| 4586 | STp->fast_open = 0; |
| 4587 | |
| 4588 | if ((STp->buffer)->syscall_result != 0 && /* in all error conditions except no medium */ |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 4589 | (SRpnt->sense[2] != 2 || SRpnt->sense[12] != 0x3A) ) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4590 | |
| 4591 | memset(cmd, 0, MAX_COMMAND_SIZE); |
| 4592 | cmd[0] = MODE_SELECT; |
| 4593 | cmd[1] = 0x10; |
| 4594 | cmd[4] = 4 + MODE_HEADER_LENGTH; |
| 4595 | |
| 4596 | (STp->buffer)->b_data[0] = cmd[4] - 1; |
| 4597 | (STp->buffer)->b_data[1] = 0; /* Medium Type - ignoring */ |
| 4598 | (STp->buffer)->b_data[2] = 0; /* Reserved */ |
| 4599 | (STp->buffer)->b_data[3] = 0; /* Block Descriptor Length */ |
| 4600 | (STp->buffer)->b_data[MODE_HEADER_LENGTH + 0] = 0x3f; |
| 4601 | (STp->buffer)->b_data[MODE_HEADER_LENGTH + 1] = 1; |
| 4602 | (STp->buffer)->b_data[MODE_HEADER_LENGTH + 2] = 2; |
| 4603 | (STp->buffer)->b_data[MODE_HEADER_LENGTH + 3] = 3; |
| 4604 | |
| 4605 | #if DEBUG |
| 4606 | printk(OSST_DEB_MSG "%s:D: Applying soft reset\n", name); |
| 4607 | #endif |
| 4608 | SRpnt = osst_do_scsi(SRpnt, STp, cmd, cmd[4], DMA_TO_DEVICE, STp->timeout, 0, 1); |
| 4609 | |
| 4610 | STp->header_ok = 0; |
| 4611 | |
| 4612 | for (i=0; i < 10; i++) { |
| 4613 | |
| 4614 | memset (cmd, 0, MAX_COMMAND_SIZE); |
| 4615 | cmd[0] = TEST_UNIT_READY; |
| 4616 | |
| 4617 | SRpnt = osst_do_scsi(SRpnt, STp, cmd, 0, DMA_NONE, |
| 4618 | STp->timeout, MAX_RETRIES, 1); |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 4619 | if ((SRpnt->sense[0] & 0x70) != 0x70 || |
| 4620 | (SRpnt->sense[2] & 0x0f) == NOT_READY) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4621 | break; |
| 4622 | |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 4623 | if ((SRpnt->sense[2] & 0x0f) == UNIT_ATTENTION) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4624 | STp->pos_unknown = 0; |
| 4625 | STp->partition = STp->new_partition = 0; |
| 4626 | if (STp->can_partitions) |
| 4627 | STp->nbr_partitions = 1; /* This guess will be updated later if necessary */ |
| 4628 | for (i=0; i < ST_NBR_PARTITIONS; i++) { |
| 4629 | STps = &(STp->ps[i]); |
| 4630 | STps->rw = ST_IDLE; |
| 4631 | STps->eof = ST_NOEOF; |
| 4632 | STps->at_sm = 0; |
| 4633 | STps->last_block_valid = 0; |
| 4634 | STps->drv_block = 0; |
| 4635 | STps->drv_file = 0 ; |
| 4636 | } |
| 4637 | new_session = 1; |
| 4638 | } |
| 4639 | } |
| 4640 | } |
| 4641 | |
| 4642 | if (osst_wait_ready(STp, &SRpnt, 15 * 60, 0)) /* FIXME - not allowed with NOBLOCK */ |
| 4643 | printk(KERN_INFO "%s:I: Device did not become Ready in open\n", name); |
| 4644 | |
| 4645 | if ((STp->buffer)->syscall_result != 0) { |
| 4646 | if ((STp->device)->scsi_level >= SCSI_2 && |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 4647 | (SRpnt->sense[0] & 0x70) == 0x70 && |
| 4648 | (SRpnt->sense[2] & 0x0f) == NOT_READY && |
| 4649 | SRpnt->sense[12] == 0x3a) { /* Check ASC */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4650 | STp->ready = ST_NO_TAPE; |
| 4651 | } else |
| 4652 | STp->ready = ST_NOT_READY; |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 4653 | osst_release_request(SRpnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4654 | SRpnt = NULL; |
| 4655 | STp->density = 0; /* Clear the erroneous "residue" */ |
| 4656 | STp->write_prot = 0; |
| 4657 | STp->block_size = 0; |
| 4658 | STp->ps[0].drv_file = STp->ps[0].drv_block = (-1); |
| 4659 | STp->partition = STp->new_partition = 0; |
| 4660 | STp->door_locked = ST_UNLOCKED; |
| 4661 | return 0; |
| 4662 | } |
| 4663 | |
| 4664 | osst_configure_onstream(STp, &SRpnt); |
| 4665 | |
| 4666 | STp->block_size = STp->raw ? OS_FRAME_SIZE : ( |
| 4667 | (STm->default_blksize > 0) ? STm->default_blksize : OS_DATA_SIZE); |
| 4668 | STp->buffer->buffer_blocks = STp->raw ? 1 : OS_DATA_SIZE / STp->block_size; |
| 4669 | STp->buffer->buffer_bytes = |
| 4670 | STp->buffer->read_pointer = |
| 4671 | STp->frame_in_buffer = 0; |
| 4672 | |
| 4673 | #if DEBUG |
| 4674 | if (debugging) |
| 4675 | printk(OSST_DEB_MSG "%s:D: Block size: %d, frame size: %d, buffer size: %d (%d blocks).\n", |
| 4676 | name, STp->block_size, OS_FRAME_SIZE, (STp->buffer)->buffer_size, |
| 4677 | (STp->buffer)->buffer_blocks); |
| 4678 | #endif |
| 4679 | |
| 4680 | if (STp->drv_write_prot) { |
| 4681 | STp->write_prot = 1; |
| 4682 | #if DEBUG |
| 4683 | if (debugging) |
| 4684 | printk(OSST_DEB_MSG "%s:D: Write protected\n", name); |
| 4685 | #endif |
| 4686 | if ((flags & O_ACCMODE) == O_WRONLY || (flags & O_ACCMODE) == O_RDWR) { |
| 4687 | retval = (-EROFS); |
| 4688 | goto err_out; |
| 4689 | } |
| 4690 | } |
| 4691 | |
| 4692 | if (new_session) { /* Change the drive parameters for the new mode */ |
| 4693 | #if DEBUG |
| 4694 | if (debugging) |
| 4695 | printk(OSST_DEB_MSG "%s:D: New Session\n", name); |
| 4696 | #endif |
| 4697 | STp->density_changed = STp->blksize_changed = 0; |
| 4698 | STp->compression_changed = 0; |
| 4699 | } |
| 4700 | |
| 4701 | /* |
| 4702 | * properly position the tape and check the ADR headers |
| 4703 | */ |
| 4704 | if (STp->door_locked == ST_UNLOCKED) { |
| 4705 | if (do_door_lock(STp, 1)) |
| 4706 | printk(KERN_INFO "%s:I: Can't lock drive door\n", name); |
| 4707 | else |
| 4708 | STp->door_locked = ST_LOCKED_AUTO; |
| 4709 | } |
| 4710 | |
| 4711 | osst_analyze_headers(STp, &SRpnt); |
| 4712 | |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 4713 | osst_release_request(SRpnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4714 | SRpnt = NULL; |
| 4715 | |
| 4716 | return 0; |
| 4717 | |
| 4718 | err_out: |
| 4719 | if (SRpnt != NULL) |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 4720 | osst_release_request(SRpnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4721 | normalize_buffer(STp->buffer); |
| 4722 | STp->header_ok = 0; |
| 4723 | STp->in_use = 0; |
| 4724 | scsi_device_put(STp->device); |
| 4725 | |
| 4726 | return retval; |
| 4727 | } |
| 4728 | |
Jonathan Corbet | 647d87b | 2008-05-15 12:23:19 -0600 | [diff] [blame] | 4729 | /* BKL pushdown: spaghetti avoidance wrapper */ |
| 4730 | static int os_scsi_tape_open(struct inode * inode, struct file * filp) |
| 4731 | { |
| 4732 | int ret; |
| 4733 | |
| 4734 | lock_kernel(); |
| 4735 | ret = __os_scsi_tape_open(inode, filp); |
| 4736 | unlock_kernel(); |
| 4737 | return ret; |
| 4738 | } |
| 4739 | |
| 4740 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4741 | |
| 4742 | /* Flush the tape buffer before close */ |
Miklos Szeredi | 75e1fcc | 2006-06-23 02:05:12 -0700 | [diff] [blame] | 4743 | static int os_scsi_tape_flush(struct file * filp, fl_owner_t id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4744 | { |
| 4745 | int result = 0, result2; |
| 4746 | struct osst_tape * STp = filp->private_data; |
| 4747 | struct st_modedef * STm = &(STp->modes[STp->current_mode]); |
| 4748 | struct st_partstat * STps = &(STp->ps[STp->partition]); |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 4749 | struct osst_request * SRpnt = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4750 | char * name = tape_name(STp); |
| 4751 | |
| 4752 | if (file_count(filp) > 1) |
| 4753 | return 0; |
| 4754 | |
| 4755 | if ((STps->rw == ST_WRITING || STp->dirty) && !STp->pos_unknown) { |
| 4756 | STp->write_type = OS_WRITE_DATA; |
| 4757 | result = osst_flush_write_buffer(STp, &SRpnt); |
| 4758 | if (result != 0 && result != (-ENOSPC)) |
| 4759 | goto out; |
| 4760 | } |
| 4761 | if ( STps->rw >= ST_WRITING && !STp->pos_unknown) { |
| 4762 | |
| 4763 | #if DEBUG |
| 4764 | if (debugging) { |
| 4765 | printk(OSST_DEB_MSG "%s:D: File length %ld bytes.\n", |
| 4766 | name, (long)(filp->f_pos)); |
| 4767 | printk(OSST_DEB_MSG "%s:D: Async write waits %d, finished %d.\n", |
| 4768 | name, STp->nbr_waits, STp->nbr_finished); |
| 4769 | } |
| 4770 | #endif |
| 4771 | result = osst_write_trailer(STp, &SRpnt, !(STp->rew_at_close)); |
| 4772 | #if DEBUG |
| 4773 | if (debugging) |
| 4774 | printk(OSST_DEB_MSG "%s:D: Buffer flushed, %d EOF(s) written\n", |
| 4775 | name, 1+STp->two_fm); |
| 4776 | #endif |
| 4777 | } |
| 4778 | else if (!STp->rew_at_close) { |
| 4779 | STps = &(STp->ps[STp->partition]); |
| 4780 | if (!STm->sysv || STps->rw != ST_READING) { |
| 4781 | if (STp->can_bsr) |
| 4782 | result = osst_flush_buffer(STp, &SRpnt, 0); /* this is the default path */ |
| 4783 | else if (STps->eof == ST_FM_HIT) { |
| 4784 | result = cross_eof(STp, &SRpnt, 0); |
| 4785 | if (result) { |
| 4786 | if (STps->drv_file >= 0) |
| 4787 | STps->drv_file++; |
| 4788 | STps->drv_block = 0; |
| 4789 | STps->eof = ST_FM; |
| 4790 | } |
| 4791 | else |
| 4792 | STps->eof = ST_NOEOF; |
| 4793 | } |
| 4794 | } |
| 4795 | else if ((STps->eof == ST_NOEOF && |
| 4796 | !(result = cross_eof(STp, &SRpnt, 1))) || |
| 4797 | STps->eof == ST_FM_HIT) { |
| 4798 | if (STps->drv_file >= 0) |
| 4799 | STps->drv_file++; |
| 4800 | STps->drv_block = 0; |
| 4801 | STps->eof = ST_FM; |
| 4802 | } |
| 4803 | } |
| 4804 | |
| 4805 | out: |
| 4806 | if (STp->rew_at_close) { |
| 4807 | result2 = osst_position_tape_and_confirm(STp, &SRpnt, STp->first_data_ppos); |
| 4808 | STps->drv_file = STps->drv_block = STp->frame_seq_number = STp->logical_blk_num = 0; |
| 4809 | if (result == 0 && result2 < 0) |
| 4810 | result = result2; |
| 4811 | } |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 4812 | if (SRpnt) osst_release_request(SRpnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4813 | |
| 4814 | if (STp->abort_count || STp->recover_count) { |
| 4815 | printk(KERN_INFO "%s:I:", name); |
| 4816 | if (STp->abort_count) |
| 4817 | printk(" %d unrecovered errors", STp->abort_count); |
| 4818 | if (STp->recover_count) |
| 4819 | printk(" %d recovered errors", STp->recover_count); |
| 4820 | if (STp->write_count) |
| 4821 | printk(" in %d frames written", STp->write_count); |
| 4822 | if (STp->read_count) |
| 4823 | printk(" in %d frames read", STp->read_count); |
| 4824 | printk("\n"); |
| 4825 | STp->recover_count = 0; |
| 4826 | STp->abort_count = 0; |
| 4827 | } |
| 4828 | STp->write_count = 0; |
| 4829 | STp->read_count = 0; |
| 4830 | |
| 4831 | return result; |
| 4832 | } |
| 4833 | |
| 4834 | |
| 4835 | /* Close the device and release it */ |
| 4836 | static int os_scsi_tape_close(struct inode * inode, struct file * filp) |
| 4837 | { |
| 4838 | int result = 0; |
| 4839 | struct osst_tape * STp = filp->private_data; |
| 4840 | |
| 4841 | if (STp->door_locked == ST_LOCKED_AUTO) |
| 4842 | do_door_lock(STp, 0); |
| 4843 | |
| 4844 | if (STp->raw) |
| 4845 | STp->header_ok = 0; |
| 4846 | |
| 4847 | normalize_buffer(STp->buffer); |
| 4848 | write_lock(&os_scsi_tapes_lock); |
| 4849 | STp->in_use = 0; |
| 4850 | write_unlock(&os_scsi_tapes_lock); |
| 4851 | |
| 4852 | scsi_device_put(STp->device); |
| 4853 | |
| 4854 | return result; |
| 4855 | } |
| 4856 | |
| 4857 | |
| 4858 | /* The ioctl command */ |
| 4859 | static int osst_ioctl(struct inode * inode,struct file * file, |
| 4860 | unsigned int cmd_in, unsigned long arg) |
| 4861 | { |
Eric Sesterhenn | 45223fd | 2006-09-25 16:59:08 -0700 | [diff] [blame] | 4862 | int i, cmd_nr, cmd_type, blk, retval = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4863 | struct st_modedef * STm; |
| 4864 | struct st_partstat * STps; |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 4865 | struct osst_request * SRpnt = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4866 | struct osst_tape * STp = file->private_data; |
| 4867 | char * name = tape_name(STp); |
| 4868 | void __user * p = (void __user *)arg; |
| 4869 | |
Matthias Kaehlcke | 4390e60 | 2007-08-10 14:50:44 -0700 | [diff] [blame] | 4870 | if (mutex_lock_interruptible(&STp->lock)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4871 | return -ERESTARTSYS; |
| 4872 | |
| 4873 | #if DEBUG |
| 4874 | if (debugging && !STp->in_use) { |
| 4875 | printk(OSST_DEB_MSG "%s:D: Incorrect device.\n", name); |
| 4876 | retval = (-EIO); |
| 4877 | goto out; |
| 4878 | } |
| 4879 | #endif |
| 4880 | STm = &(STp->modes[STp->current_mode]); |
| 4881 | STps = &(STp->ps[STp->partition]); |
| 4882 | |
| 4883 | /* |
| 4884 | * If we are in the middle of error recovery, don't let anyone |
| 4885 | * else try and use this device. Also, if error recovery fails, it |
| 4886 | * may try and take the device offline, in which case all further |
| 4887 | * access to the device is prohibited. |
| 4888 | */ |
| 4889 | if( !scsi_block_when_processing_errors(STp->device) ) { |
| 4890 | retval = (-ENXIO); |
| 4891 | goto out; |
| 4892 | } |
| 4893 | |
| 4894 | cmd_type = _IOC_TYPE(cmd_in); |
| 4895 | cmd_nr = _IOC_NR(cmd_in); |
| 4896 | #if DEBUG |
| 4897 | printk(OSST_DEB_MSG "%s:D: Ioctl %d,%d in %s mode\n", name, |
| 4898 | cmd_type, cmd_nr, STp->raw?"raw":"normal"); |
| 4899 | #endif |
| 4900 | if (cmd_type == _IOC_TYPE(MTIOCTOP) && cmd_nr == _IOC_NR(MTIOCTOP)) { |
| 4901 | struct mtop mtc; |
| 4902 | int auto_weof = 0; |
| 4903 | |
| 4904 | if (_IOC_SIZE(cmd_in) != sizeof(mtc)) { |
| 4905 | retval = (-EINVAL); |
| 4906 | goto out; |
| 4907 | } |
| 4908 | |
| 4909 | i = copy_from_user((char *) &mtc, p, sizeof(struct mtop)); |
| 4910 | if (i) { |
| 4911 | retval = (-EFAULT); |
| 4912 | goto out; |
| 4913 | } |
| 4914 | |
| 4915 | if (mtc.mt_op == MTSETDRVBUFFER && !capable(CAP_SYS_ADMIN)) { |
| 4916 | printk(KERN_WARNING "%s:W: MTSETDRVBUFFER only allowed for root.\n", name); |
| 4917 | retval = (-EPERM); |
| 4918 | goto out; |
| 4919 | } |
| 4920 | |
| 4921 | if (!STm->defined && (mtc.mt_op != MTSETDRVBUFFER && (mtc.mt_count & MT_ST_OPTIONS) == 0)) { |
| 4922 | retval = (-ENXIO); |
| 4923 | goto out; |
| 4924 | } |
| 4925 | |
| 4926 | if (!STp->pos_unknown) { |
| 4927 | |
| 4928 | if (STps->eof == ST_FM_HIT) { |
| 4929 | if (mtc.mt_op == MTFSF || mtc.mt_op == MTFSFM|| mtc.mt_op == MTEOM) { |
| 4930 | mtc.mt_count -= 1; |
| 4931 | if (STps->drv_file >= 0) |
| 4932 | STps->drv_file += 1; |
| 4933 | } |
| 4934 | else if (mtc.mt_op == MTBSF || mtc.mt_op == MTBSFM) { |
| 4935 | mtc.mt_count += 1; |
| 4936 | if (STps->drv_file >= 0) |
| 4937 | STps->drv_file += 1; |
| 4938 | } |
| 4939 | } |
| 4940 | |
| 4941 | if (mtc.mt_op == MTSEEK) { |
| 4942 | /* Old position must be restored if partition will be changed */ |
| 4943 | i = !STp->can_partitions || (STp->new_partition != STp->partition); |
| 4944 | } |
| 4945 | else { |
| 4946 | i = mtc.mt_op == MTREW || mtc.mt_op == MTOFFL || |
| 4947 | mtc.mt_op == MTRETEN || mtc.mt_op == MTEOM || |
| 4948 | mtc.mt_op == MTLOCK || mtc.mt_op == MTLOAD || |
| 4949 | mtc.mt_op == MTFSF || mtc.mt_op == MTFSFM || |
| 4950 | mtc.mt_op == MTBSF || mtc.mt_op == MTBSFM || |
| 4951 | mtc.mt_op == MTCOMPRESSION; |
| 4952 | } |
| 4953 | i = osst_flush_buffer(STp, &SRpnt, i); |
| 4954 | if (i < 0) { |
| 4955 | retval = i; |
| 4956 | goto out; |
| 4957 | } |
| 4958 | } |
| 4959 | else { |
| 4960 | /* |
| 4961 | * If there was a bus reset, block further access |
| 4962 | * to this device. If the user wants to rewind the tape, |
| 4963 | * then reset the flag and allow access again. |
| 4964 | */ |
| 4965 | if(mtc.mt_op != MTREW && |
| 4966 | mtc.mt_op != MTOFFL && |
| 4967 | mtc.mt_op != MTRETEN && |
| 4968 | mtc.mt_op != MTERASE && |
| 4969 | mtc.mt_op != MTSEEK && |
| 4970 | mtc.mt_op != MTEOM) { |
| 4971 | retval = (-EIO); |
| 4972 | goto out; |
| 4973 | } |
| 4974 | reset_state(STp); |
| 4975 | /* remove this when the midlevel properly clears was_reset */ |
| 4976 | STp->device->was_reset = 0; |
| 4977 | } |
| 4978 | |
| 4979 | if (mtc.mt_op != MTCOMPRESSION && mtc.mt_op != MTLOCK && |
| 4980 | mtc.mt_op != MTNOP && mtc.mt_op != MTSETBLK && |
| 4981 | mtc.mt_op != MTSETDENSITY && mtc.mt_op != MTSETDRVBUFFER && |
| 4982 | mtc.mt_op != MTMKPART && mtc.mt_op != MTSETPART && |
| 4983 | mtc.mt_op != MTWEOF && mtc.mt_op != MTWSM ) { |
| 4984 | |
| 4985 | /* |
| 4986 | * The user tells us to move to another position on the tape. |
| 4987 | * If we were appending to the tape content, that would leave |
| 4988 | * the tape without proper end, in that case write EOD and |
| 4989 | * update the header to reflect its position. |
| 4990 | */ |
| 4991 | #if DEBUG |
| 4992 | printk(KERN_WARNING "%s:D: auto_weod %s at ffp=%d,efp=%d,fsn=%d,lbn=%d,fn=%d,bn=%d\n", name, |
| 4993 | STps->rw >= ST_WRITING ? "write" : STps->rw == ST_READING ? "read" : "idle", |
| 4994 | STp->first_frame_position, STp->eod_frame_ppos, STp->frame_seq_number, |
| 4995 | STp->logical_blk_num, STps->drv_file, STps->drv_block ); |
| 4996 | #endif |
| 4997 | if (STps->rw >= ST_WRITING && STp->first_frame_position >= STp->eod_frame_ppos) { |
| 4998 | auto_weof = ((STp->write_type != OS_WRITE_NEW_MARK) && |
| 4999 | !(mtc.mt_op == MTREW || mtc.mt_op == MTOFFL)); |
| 5000 | i = osst_write_trailer(STp, &SRpnt, |
| 5001 | !(mtc.mt_op == MTREW || mtc.mt_op == MTOFFL)); |
| 5002 | #if DEBUG |
| 5003 | printk(KERN_WARNING "%s:D: post trailer xeof=%d,ffp=%d,efp=%d,fsn=%d,lbn=%d,fn=%d,bn=%d\n", |
| 5004 | name, auto_weof, STp->first_frame_position, STp->eod_frame_ppos, |
| 5005 | STp->frame_seq_number, STp->logical_blk_num, STps->drv_file, STps->drv_block ); |
| 5006 | #endif |
| 5007 | if (i < 0) { |
| 5008 | retval = i; |
| 5009 | goto out; |
| 5010 | } |
| 5011 | } |
| 5012 | STps->rw = ST_IDLE; |
| 5013 | } |
| 5014 | |
| 5015 | if (mtc.mt_op == MTOFFL && STp->door_locked != ST_UNLOCKED) |
| 5016 | do_door_lock(STp, 0); /* Ignore result! */ |
| 5017 | |
| 5018 | if (mtc.mt_op == MTSETDRVBUFFER && |
| 5019 | (mtc.mt_count & MT_ST_OPTIONS) != 0) { |
| 5020 | retval = osst_set_options(STp, mtc.mt_count); |
| 5021 | goto out; |
| 5022 | } |
| 5023 | |
| 5024 | if (mtc.mt_op == MTSETPART) { |
| 5025 | if (mtc.mt_count >= STp->nbr_partitions) |
| 5026 | retval = -EINVAL; |
| 5027 | else { |
| 5028 | STp->new_partition = mtc.mt_count; |
| 5029 | retval = 0; |
| 5030 | } |
| 5031 | goto out; |
| 5032 | } |
| 5033 | |
| 5034 | if (mtc.mt_op == MTMKPART) { |
| 5035 | if (!STp->can_partitions) { |
| 5036 | retval = (-EINVAL); |
| 5037 | goto out; |
| 5038 | } |
| 5039 | if ((i = osst_int_ioctl(STp, &SRpnt, MTREW, 0)) < 0 /*|| |
| 5040 | (i = partition_tape(inode, mtc.mt_count)) < 0*/) { |
| 5041 | retval = i; |
| 5042 | goto out; |
| 5043 | } |
| 5044 | for (i=0; i < ST_NBR_PARTITIONS; i++) { |
| 5045 | STp->ps[i].rw = ST_IDLE; |
| 5046 | STp->ps[i].at_sm = 0; |
| 5047 | STp->ps[i].last_block_valid = 0; |
| 5048 | } |
| 5049 | STp->partition = STp->new_partition = 0; |
| 5050 | STp->nbr_partitions = 1; /* Bad guess ?-) */ |
| 5051 | STps->drv_block = STps->drv_file = 0; |
| 5052 | retval = 0; |
| 5053 | goto out; |
| 5054 | } |
| 5055 | |
| 5056 | if (mtc.mt_op == MTSEEK) { |
| 5057 | if (STp->raw) |
| 5058 | i = osst_set_frame_position(STp, &SRpnt, mtc.mt_count, 0); |
| 5059 | else |
| 5060 | i = osst_seek_sector(STp, &SRpnt, mtc.mt_count); |
| 5061 | if (!STp->can_partitions) |
| 5062 | STp->ps[0].rw = ST_IDLE; |
| 5063 | retval = i; |
| 5064 | goto out; |
| 5065 | } |
| 5066 | |
| 5067 | if (mtc.mt_op == MTLOCK || mtc.mt_op == MTUNLOCK) { |
| 5068 | retval = do_door_lock(STp, (mtc.mt_op == MTLOCK)); |
| 5069 | goto out; |
| 5070 | } |
| 5071 | |
| 5072 | if (auto_weof) |
| 5073 | cross_eof(STp, &SRpnt, 0); |
| 5074 | |
| 5075 | if (mtc.mt_op == MTCOMPRESSION) |
| 5076 | retval = -EINVAL; /* OnStream drives don't have compression hardware */ |
| 5077 | else |
| 5078 | /* MTBSF MTBSFM MTBSR MTBSS MTEOM MTERASE MTFSF MTFSFB MTFSR MTFSS |
| 5079 | * MTLOAD MTOFFL MTRESET MTRETEN MTREW MTUNLOAD MTWEOF MTWSM */ |
| 5080 | retval = osst_int_ioctl(STp, &SRpnt, mtc.mt_op, mtc.mt_count); |
| 5081 | goto out; |
| 5082 | } |
| 5083 | |
| 5084 | if (!STm->defined) { |
| 5085 | retval = (-ENXIO); |
| 5086 | goto out; |
| 5087 | } |
| 5088 | |
| 5089 | if ((i = osst_flush_buffer(STp, &SRpnt, 0)) < 0) { |
| 5090 | retval = i; |
| 5091 | goto out; |
| 5092 | } |
| 5093 | |
| 5094 | if (cmd_type == _IOC_TYPE(MTIOCGET) && cmd_nr == _IOC_NR(MTIOCGET)) { |
| 5095 | struct mtget mt_status; |
| 5096 | |
| 5097 | if (_IOC_SIZE(cmd_in) != sizeof(struct mtget)) { |
| 5098 | retval = (-EINVAL); |
| 5099 | goto out; |
| 5100 | } |
| 5101 | |
| 5102 | mt_status.mt_type = MT_ISONSTREAM_SC; |
| 5103 | mt_status.mt_erreg = STp->recover_erreg << MT_ST_SOFTERR_SHIFT; |
| 5104 | mt_status.mt_dsreg = |
| 5105 | ((STp->block_size << MT_ST_BLKSIZE_SHIFT) & MT_ST_BLKSIZE_MASK) | |
| 5106 | ((STp->density << MT_ST_DENSITY_SHIFT) & MT_ST_DENSITY_MASK); |
| 5107 | mt_status.mt_blkno = STps->drv_block; |
| 5108 | mt_status.mt_fileno = STps->drv_file; |
| 5109 | if (STp->block_size != 0) { |
| 5110 | if (STps->rw == ST_WRITING) |
| 5111 | mt_status.mt_blkno += (STp->buffer)->buffer_bytes / STp->block_size; |
| 5112 | else if (STps->rw == ST_READING) |
| 5113 | mt_status.mt_blkno -= ((STp->buffer)->buffer_bytes + |
| 5114 | STp->block_size - 1) / STp->block_size; |
| 5115 | } |
| 5116 | |
| 5117 | mt_status.mt_gstat = 0; |
| 5118 | if (STp->drv_write_prot) |
| 5119 | mt_status.mt_gstat |= GMT_WR_PROT(0xffffffff); |
| 5120 | if (mt_status.mt_blkno == 0) { |
| 5121 | if (mt_status.mt_fileno == 0) |
| 5122 | mt_status.mt_gstat |= GMT_BOT(0xffffffff); |
| 5123 | else |
| 5124 | mt_status.mt_gstat |= GMT_EOF(0xffffffff); |
| 5125 | } |
| 5126 | mt_status.mt_resid = STp->partition; |
| 5127 | if (STps->eof == ST_EOM_OK || STps->eof == ST_EOM_ERROR) |
| 5128 | mt_status.mt_gstat |= GMT_EOT(0xffffffff); |
| 5129 | else if (STps->eof >= ST_EOM_OK) |
| 5130 | mt_status.mt_gstat |= GMT_EOD(0xffffffff); |
| 5131 | if (STp->density == 1) |
| 5132 | mt_status.mt_gstat |= GMT_D_800(0xffffffff); |
| 5133 | else if (STp->density == 2) |
| 5134 | mt_status.mt_gstat |= GMT_D_1600(0xffffffff); |
| 5135 | else if (STp->density == 3) |
| 5136 | mt_status.mt_gstat |= GMT_D_6250(0xffffffff); |
| 5137 | if (STp->ready == ST_READY) |
| 5138 | mt_status.mt_gstat |= GMT_ONLINE(0xffffffff); |
| 5139 | if (STp->ready == ST_NO_TAPE) |
| 5140 | mt_status.mt_gstat |= GMT_DR_OPEN(0xffffffff); |
| 5141 | if (STps->at_sm) |
| 5142 | mt_status.mt_gstat |= GMT_SM(0xffffffff); |
| 5143 | if (STm->do_async_writes || (STm->do_buffer_writes && STp->block_size != 0) || |
| 5144 | STp->drv_buffer != 0) |
| 5145 | mt_status.mt_gstat |= GMT_IM_REP_EN(0xffffffff); |
| 5146 | |
| 5147 | i = copy_to_user(p, &mt_status, sizeof(struct mtget)); |
| 5148 | if (i) { |
| 5149 | retval = (-EFAULT); |
| 5150 | goto out; |
| 5151 | } |
| 5152 | |
| 5153 | STp->recover_erreg = 0; /* Clear after read */ |
| 5154 | retval = 0; |
| 5155 | goto out; |
| 5156 | } /* End of MTIOCGET */ |
| 5157 | |
| 5158 | if (cmd_type == _IOC_TYPE(MTIOCPOS) && cmd_nr == _IOC_NR(MTIOCPOS)) { |
| 5159 | struct mtpos mt_pos; |
| 5160 | |
| 5161 | if (_IOC_SIZE(cmd_in) != sizeof(struct mtpos)) { |
| 5162 | retval = (-EINVAL); |
| 5163 | goto out; |
| 5164 | } |
| 5165 | if (STp->raw) |
| 5166 | blk = osst_get_frame_position(STp, &SRpnt); |
| 5167 | else |
| 5168 | blk = osst_get_sector(STp, &SRpnt); |
| 5169 | if (blk < 0) { |
| 5170 | retval = blk; |
| 5171 | goto out; |
| 5172 | } |
| 5173 | mt_pos.mt_blkno = blk; |
| 5174 | i = copy_to_user(p, &mt_pos, sizeof(struct mtpos)); |
| 5175 | if (i) |
| 5176 | retval = -EFAULT; |
| 5177 | goto out; |
| 5178 | } |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 5179 | if (SRpnt) osst_release_request(SRpnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5180 | |
Matthias Kaehlcke | 4390e60 | 2007-08-10 14:50:44 -0700 | [diff] [blame] | 5181 | mutex_unlock(&STp->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5182 | |
| 5183 | return scsi_ioctl(STp->device, cmd_in, p); |
| 5184 | |
| 5185 | out: |
Willem Riede | 5e6575c | 2006-02-11 14:46:56 -0500 | [diff] [blame] | 5186 | if (SRpnt) osst_release_request(SRpnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5187 | |
Matthias Kaehlcke | 4390e60 | 2007-08-10 14:50:44 -0700 | [diff] [blame] | 5188 | mutex_unlock(&STp->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5189 | |
| 5190 | return retval; |
| 5191 | } |
| 5192 | |
| 5193 | #ifdef CONFIG_COMPAT |
| 5194 | static long osst_compat_ioctl(struct file * file, unsigned int cmd_in, unsigned long arg) |
| 5195 | { |
| 5196 | struct osst_tape *STp = file->private_data; |
| 5197 | struct scsi_device *sdev = STp->device; |
| 5198 | int ret = -ENOIOCTLCMD; |
| 5199 | if (sdev->host->hostt->compat_ioctl) { |
| 5200 | |
| 5201 | ret = sdev->host->hostt->compat_ioctl(sdev, cmd_in, (void __user *)arg); |
| 5202 | |
| 5203 | } |
| 5204 | return ret; |
| 5205 | } |
| 5206 | #endif |
| 5207 | |
| 5208 | |
| 5209 | |
| 5210 | /* Memory handling routines */ |
| 5211 | |
| 5212 | /* Try to allocate a new tape buffer skeleton. Caller must not hold os_scsi_tapes_lock */ |
| 5213 | static struct osst_buffer * new_tape_buffer( int from_initialization, int need_dma, int max_sg ) |
| 5214 | { |
Al Viro | c53033f | 2005-10-21 03:22:08 -0400 | [diff] [blame] | 5215 | int i; |
| 5216 | gfp_t priority; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5217 | struct osst_buffer *tb; |
| 5218 | |
| 5219 | if (from_initialization) |
| 5220 | priority = GFP_ATOMIC; |
| 5221 | else |
| 5222 | priority = GFP_KERNEL; |
| 5223 | |
| 5224 | i = sizeof(struct osst_buffer) + (osst_max_sg_segs - 1) * sizeof(struct scatterlist); |
Jeff Garzik | 37e0333 | 2006-10-04 05:23:04 -0400 | [diff] [blame] | 5225 | tb = kzalloc(i, priority); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5226 | if (!tb) { |
| 5227 | printk(KERN_NOTICE "osst :I: Can't allocate new tape buffer.\n"); |
| 5228 | return NULL; |
| 5229 | } |
Jeff Garzik | 37e0333 | 2006-10-04 05:23:04 -0400 | [diff] [blame] | 5230 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5231 | tb->sg_segs = tb->orig_sg_segs = 0; |
| 5232 | tb->use_sg = max_sg; |
| 5233 | tb->in_use = 1; |
| 5234 | tb->dma = need_dma; |
| 5235 | tb->buffer_size = 0; |
| 5236 | #if DEBUG |
| 5237 | if (debugging) |
| 5238 | printk(OSST_DEB_MSG |
| 5239 | "osst :D: Allocated tape buffer skeleton (%d bytes, %d segments, dma: %d).\n", |
| 5240 | i, max_sg, need_dma); |
| 5241 | #endif |
| 5242 | return tb; |
| 5243 | } |
| 5244 | |
| 5245 | /* Try to allocate a temporary (while a user has the device open) enlarged tape buffer */ |
| 5246 | static int enlarge_buffer(struct osst_buffer *STbuffer, int need_dma) |
| 5247 | { |
Al Viro | c53033f | 2005-10-21 03:22:08 -0400 | [diff] [blame] | 5248 | int segs, nbr, max_segs, b_size, order, got; |
| 5249 | gfp_t priority; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5250 | |
| 5251 | if (STbuffer->buffer_size >= OS_FRAME_SIZE) |
| 5252 | return 1; |
| 5253 | |
| 5254 | if (STbuffer->sg_segs) { |
| 5255 | printk(KERN_WARNING "osst :A: Buffer not previously normalized.\n"); |
| 5256 | normalize_buffer(STbuffer); |
| 5257 | } |
| 5258 | /* See how many segments we can use -- need at least two */ |
| 5259 | nbr = max_segs = STbuffer->use_sg; |
| 5260 | if (nbr <= 2) |
| 5261 | return 0; |
| 5262 | |
| 5263 | priority = GFP_KERNEL /* | __GFP_NOWARN */; |
| 5264 | if (need_dma) |
| 5265 | priority |= GFP_DMA; |
| 5266 | |
| 5267 | /* Try to allocate the first segment up to OS_DATA_SIZE and the others |
| 5268 | big enough to reach the goal (code assumes no segments in place) */ |
| 5269 | for (b_size = OS_DATA_SIZE, order = OSST_FIRST_ORDER; b_size >= PAGE_SIZE; order--, b_size /= 2) { |
Jens Axboe | 45711f1 | 2007-10-22 21:19:53 +0200 | [diff] [blame] | 5270 | struct page *page = alloc_pages(priority, order); |
| 5271 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5272 | STbuffer->sg[0].offset = 0; |
Jens Axboe | 45711f1 | 2007-10-22 21:19:53 +0200 | [diff] [blame] | 5273 | if (page != NULL) { |
Jens Axboe | 642f14903 | 2007-10-24 11:20:47 +0200 | [diff] [blame] | 5274 | sg_set_page(&STbuffer->sg[0], page, b_size, 0); |
Jens Axboe | 45711f1 | 2007-10-22 21:19:53 +0200 | [diff] [blame] | 5275 | STbuffer->b_data = page_address(page); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5276 | break; |
| 5277 | } |
| 5278 | } |
Jens Axboe | 45711f1 | 2007-10-22 21:19:53 +0200 | [diff] [blame] | 5279 | if (sg_page(&STbuffer->sg[0]) == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5280 | printk(KERN_NOTICE "osst :I: Can't allocate tape buffer main segment.\n"); |
| 5281 | return 0; |
| 5282 | } |
| 5283 | /* Got initial segment of 'bsize,order', continue with same size if possible, except for AUX */ |
| 5284 | for (segs=STbuffer->sg_segs=1, got=b_size; |
| 5285 | segs < max_segs && got < OS_FRAME_SIZE; ) { |
Jens Axboe | 45711f1 | 2007-10-22 21:19:53 +0200 | [diff] [blame] | 5286 | struct page *page = alloc_pages(priority, (OS_FRAME_SIZE - got <= PAGE_SIZE) ? 0 : order); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5287 | STbuffer->sg[segs].offset = 0; |
Jens Axboe | 45711f1 | 2007-10-22 21:19:53 +0200 | [diff] [blame] | 5288 | if (page == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5289 | if (OS_FRAME_SIZE - got <= (max_segs - segs) * b_size / 2 && order) { |
| 5290 | b_size /= 2; /* Large enough for the rest of the buffers */ |
| 5291 | order--; |
| 5292 | continue; |
| 5293 | } |
| 5294 | printk(KERN_WARNING "osst :W: Failed to enlarge buffer to %d bytes.\n", |
| 5295 | OS_FRAME_SIZE); |
| 5296 | #if DEBUG |
| 5297 | STbuffer->buffer_size = got; |
| 5298 | #endif |
| 5299 | normalize_buffer(STbuffer); |
| 5300 | return 0; |
| 5301 | } |
Jens Axboe | 642f14903 | 2007-10-24 11:20:47 +0200 | [diff] [blame] | 5302 | sg_set_page(&STbuffer->sg[segs], page, (OS_FRAME_SIZE - got <= PAGE_SIZE / 2) ? (OS_FRAME_SIZE - got) : b_size, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5303 | got += STbuffer->sg[segs].length; |
| 5304 | STbuffer->buffer_size = got; |
| 5305 | STbuffer->sg_segs = ++segs; |
| 5306 | } |
| 5307 | #if DEBUG |
| 5308 | if (debugging) { |
| 5309 | printk(OSST_DEB_MSG |
| 5310 | "osst :D: Expanded tape buffer (%d bytes, %d->%d segments, dma: %d, at: %p).\n", |
| 5311 | got, STbuffer->orig_sg_segs, STbuffer->sg_segs, need_dma, STbuffer->b_data); |
| 5312 | printk(OSST_DEB_MSG |
| 5313 | "osst :D: segment sizes: first %d at %p, last %d bytes at %p.\n", |
| 5314 | STbuffer->sg[0].length, page_address(STbuffer->sg[0].page), |
| 5315 | STbuffer->sg[segs-1].length, page_address(STbuffer->sg[segs-1].page)); |
| 5316 | } |
| 5317 | #endif |
| 5318 | |
| 5319 | return 1; |
| 5320 | } |
| 5321 | |
| 5322 | |
| 5323 | /* Release the segments */ |
| 5324 | static void normalize_buffer(struct osst_buffer *STbuffer) |
| 5325 | { |
| 5326 | int i, order, b_size; |
| 5327 | |
| 5328 | for (i=0; i < STbuffer->sg_segs; i++) { |
| 5329 | |
| 5330 | for (b_size = PAGE_SIZE, order = 0; |
| 5331 | b_size < STbuffer->sg[i].length; |
| 5332 | b_size *= 2, order++); |
| 5333 | |
Jens Axboe | 45711f1 | 2007-10-22 21:19:53 +0200 | [diff] [blame] | 5334 | __free_pages(sg_page(&STbuffer->sg[i]), order); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5335 | STbuffer->buffer_size -= STbuffer->sg[i].length; |
| 5336 | } |
| 5337 | #if DEBUG |
| 5338 | if (debugging && STbuffer->orig_sg_segs < STbuffer->sg_segs) |
| 5339 | printk(OSST_DEB_MSG "osst :D: Buffer at %p normalized to %d bytes (segs %d).\n", |
| 5340 | STbuffer->b_data, STbuffer->buffer_size, STbuffer->sg_segs); |
| 5341 | #endif |
| 5342 | STbuffer->sg_segs = STbuffer->orig_sg_segs = 0; |
| 5343 | } |
| 5344 | |
| 5345 | |
| 5346 | /* Move data from the user buffer to the tape buffer. Returns zero (success) or |
| 5347 | negative error code. */ |
| 5348 | static int append_to_buffer(const char __user *ubp, struct osst_buffer *st_bp, int do_count) |
| 5349 | { |
| 5350 | int i, cnt, res, offset; |
| 5351 | |
| 5352 | for (i=0, offset=st_bp->buffer_bytes; |
| 5353 | i < st_bp->sg_segs && offset >= st_bp->sg[i].length; i++) |
| 5354 | offset -= st_bp->sg[i].length; |
| 5355 | if (i == st_bp->sg_segs) { /* Should never happen */ |
| 5356 | printk(KERN_WARNING "osst :A: Append_to_buffer offset overflow.\n"); |
| 5357 | return (-EIO); |
| 5358 | } |
| 5359 | for ( ; i < st_bp->sg_segs && do_count > 0; i++) { |
| 5360 | cnt = st_bp->sg[i].length - offset < do_count ? |
| 5361 | st_bp->sg[i].length - offset : do_count; |
Jens Axboe | 45711f1 | 2007-10-22 21:19:53 +0200 | [diff] [blame] | 5362 | res = copy_from_user(page_address(sg_page(&st_bp->sg[i])) + offset, ubp, cnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5363 | if (res) |
| 5364 | return (-EFAULT); |
| 5365 | do_count -= cnt; |
| 5366 | st_bp->buffer_bytes += cnt; |
| 5367 | ubp += cnt; |
| 5368 | offset = 0; |
| 5369 | } |
| 5370 | if (do_count) { /* Should never happen */ |
| 5371 | printk(KERN_WARNING "osst :A: Append_to_buffer overflow (left %d).\n", |
| 5372 | do_count); |
| 5373 | return (-EIO); |
| 5374 | } |
| 5375 | return 0; |
| 5376 | } |
| 5377 | |
| 5378 | |
| 5379 | /* Move data from the tape buffer to the user buffer. Returns zero (success) or |
| 5380 | negative error code. */ |
| 5381 | static int from_buffer(struct osst_buffer *st_bp, char __user *ubp, int do_count) |
| 5382 | { |
| 5383 | int i, cnt, res, offset; |
| 5384 | |
| 5385 | for (i=0, offset=st_bp->read_pointer; |
| 5386 | i < st_bp->sg_segs && offset >= st_bp->sg[i].length; i++) |
| 5387 | offset -= st_bp->sg[i].length; |
| 5388 | if (i == st_bp->sg_segs) { /* Should never happen */ |
| 5389 | printk(KERN_WARNING "osst :A: From_buffer offset overflow.\n"); |
| 5390 | return (-EIO); |
| 5391 | } |
| 5392 | for ( ; i < st_bp->sg_segs && do_count > 0; i++) { |
| 5393 | cnt = st_bp->sg[i].length - offset < do_count ? |
| 5394 | st_bp->sg[i].length - offset : do_count; |
Jens Axboe | 45711f1 | 2007-10-22 21:19:53 +0200 | [diff] [blame] | 5395 | res = copy_to_user(ubp, page_address(sg_page(&st_bp->sg[i])) + offset, cnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5396 | if (res) |
| 5397 | return (-EFAULT); |
| 5398 | do_count -= cnt; |
| 5399 | st_bp->buffer_bytes -= cnt; |
| 5400 | st_bp->read_pointer += cnt; |
| 5401 | ubp += cnt; |
| 5402 | offset = 0; |
| 5403 | } |
| 5404 | if (do_count) { /* Should never happen */ |
| 5405 | printk(KERN_WARNING "osst :A: From_buffer overflow (left %d).\n", do_count); |
| 5406 | return (-EIO); |
| 5407 | } |
| 5408 | return 0; |
| 5409 | } |
| 5410 | |
| 5411 | /* Sets the tail of the buffer after fill point to zero. |
| 5412 | Returns zero (success) or negative error code. */ |
| 5413 | static int osst_zero_buffer_tail(struct osst_buffer *st_bp) |
| 5414 | { |
| 5415 | int i, offset, do_count, cnt; |
| 5416 | |
| 5417 | for (i = 0, offset = st_bp->buffer_bytes; |
| 5418 | i < st_bp->sg_segs && offset >= st_bp->sg[i].length; i++) |
| 5419 | offset -= st_bp->sg[i].length; |
| 5420 | if (i == st_bp->sg_segs) { /* Should never happen */ |
| 5421 | printk(KERN_WARNING "osst :A: Zero_buffer offset overflow.\n"); |
| 5422 | return (-EIO); |
| 5423 | } |
| 5424 | for (do_count = OS_DATA_SIZE - st_bp->buffer_bytes; |
| 5425 | i < st_bp->sg_segs && do_count > 0; i++) { |
| 5426 | cnt = st_bp->sg[i].length - offset < do_count ? |
| 5427 | st_bp->sg[i].length - offset : do_count ; |
Jens Axboe | 45711f1 | 2007-10-22 21:19:53 +0200 | [diff] [blame] | 5428 | memset(page_address(sg_page(&st_bp->sg[i])) + offset, 0, cnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5429 | do_count -= cnt; |
| 5430 | offset = 0; |
| 5431 | } |
| 5432 | if (do_count) { /* Should never happen */ |
| 5433 | printk(KERN_WARNING "osst :A: Zero_buffer overflow (left %d).\n", do_count); |
| 5434 | return (-EIO); |
| 5435 | } |
| 5436 | return 0; |
| 5437 | } |
| 5438 | |
| 5439 | /* Copy a osst 32K chunk of memory into the buffer. |
| 5440 | Returns zero (success) or negative error code. */ |
| 5441 | static int osst_copy_to_buffer(struct osst_buffer *st_bp, unsigned char *ptr) |
| 5442 | { |
| 5443 | int i, cnt, do_count = OS_DATA_SIZE; |
| 5444 | |
| 5445 | for (i = 0; i < st_bp->sg_segs && do_count > 0; i++) { |
| 5446 | cnt = st_bp->sg[i].length < do_count ? |
| 5447 | st_bp->sg[i].length : do_count ; |
Jens Axboe | 45711f1 | 2007-10-22 21:19:53 +0200 | [diff] [blame] | 5448 | memcpy(page_address(sg_page(&st_bp->sg[i])), ptr, cnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5449 | do_count -= cnt; |
| 5450 | ptr += cnt; |
| 5451 | } |
| 5452 | if (do_count || i != st_bp->sg_segs-1) { /* Should never happen */ |
| 5453 | printk(KERN_WARNING "osst :A: Copy_to_buffer overflow (left %d at sg %d).\n", |
| 5454 | do_count, i); |
| 5455 | return (-EIO); |
| 5456 | } |
| 5457 | return 0; |
| 5458 | } |
| 5459 | |
| 5460 | /* Copy a osst 32K chunk of memory from the buffer. |
| 5461 | Returns zero (success) or negative error code. */ |
| 5462 | static int osst_copy_from_buffer(struct osst_buffer *st_bp, unsigned char *ptr) |
| 5463 | { |
| 5464 | int i, cnt, do_count = OS_DATA_SIZE; |
| 5465 | |
| 5466 | for (i = 0; i < st_bp->sg_segs && do_count > 0; i++) { |
| 5467 | cnt = st_bp->sg[i].length < do_count ? |
| 5468 | st_bp->sg[i].length : do_count ; |
Jens Axboe | 45711f1 | 2007-10-22 21:19:53 +0200 | [diff] [blame] | 5469 | memcpy(ptr, page_address(sg_page(&st_bp->sg[i])), cnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5470 | do_count -= cnt; |
| 5471 | ptr += cnt; |
| 5472 | } |
| 5473 | if (do_count || i != st_bp->sg_segs-1) { /* Should never happen */ |
| 5474 | printk(KERN_WARNING "osst :A: Copy_from_buffer overflow (left %d at sg %d).\n", |
| 5475 | do_count, i); |
| 5476 | return (-EIO); |
| 5477 | } |
| 5478 | return 0; |
| 5479 | } |
| 5480 | |
| 5481 | |
| 5482 | /* Module housekeeping */ |
| 5483 | |
| 5484 | static void validate_options (void) |
| 5485 | { |
| 5486 | if (max_dev > 0) |
| 5487 | osst_max_dev = max_dev; |
| 5488 | if (write_threshold_kbs > 0) |
| 5489 | osst_write_threshold = write_threshold_kbs * ST_KILOBYTE; |
| 5490 | if (osst_write_threshold > osst_buffer_size) |
| 5491 | osst_write_threshold = osst_buffer_size; |
| 5492 | if (max_sg_segs >= OSST_FIRST_SG) |
| 5493 | osst_max_sg_segs = max_sg_segs; |
| 5494 | #if DEBUG |
| 5495 | printk(OSST_DEB_MSG "osst :D: max tapes %d, write threshold %d, max s/g segs %d.\n", |
| 5496 | osst_max_dev, osst_write_threshold, osst_max_sg_segs); |
| 5497 | #endif |
| 5498 | } |
| 5499 | |
| 5500 | #ifndef MODULE |
| 5501 | /* Set the boot options. Syntax: osst=xxx,yyy,... |
| 5502 | where xxx is write threshold in 1024 byte blocks, |
| 5503 | and yyy is number of s/g segments to use. */ |
| 5504 | static int __init osst_setup (char *str) |
| 5505 | { |
| 5506 | int i, ints[5]; |
| 5507 | char *stp; |
| 5508 | |
| 5509 | stp = get_options(str, ARRAY_SIZE(ints), ints); |
Tobias Klauser | 6391a11 | 2006-06-08 22:23:48 -0700 | [diff] [blame] | 5510 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5511 | if (ints[0] > 0) { |
| 5512 | for (i = 0; i < ints[0] && i < ARRAY_SIZE(parms); i++) |
| 5513 | *parms[i].val = ints[i + 1]; |
| 5514 | } else { |
| 5515 | while (stp != NULL) { |
| 5516 | for (i = 0; i < ARRAY_SIZE(parms); i++) { |
| 5517 | int len = strlen(parms[i].name); |
| 5518 | if (!strncmp(stp, parms[i].name, len) && |
| 5519 | (*(stp + len) == ':' || *(stp + len) == '=')) { |
| 5520 | *parms[i].val = |
| 5521 | simple_strtoul(stp + len + 1, NULL, 0); |
| 5522 | break; |
| 5523 | } |
| 5524 | } |
Tobias Klauser | 6391a11 | 2006-06-08 22:23:48 -0700 | [diff] [blame] | 5525 | if (i >= ARRAY_SIZE(parms)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5526 | printk(KERN_INFO "osst :I: Illegal parameter in '%s'\n", |
| 5527 | stp); |
| 5528 | stp = strchr(stp, ','); |
| 5529 | if (stp) |
| 5530 | stp++; |
| 5531 | } |
| 5532 | } |
| 5533 | |
| 5534 | return 1; |
| 5535 | } |
| 5536 | |
| 5537 | __setup("osst=", osst_setup); |
| 5538 | |
| 5539 | #endif |
| 5540 | |
Arjan van de Ven | 00977a5 | 2007-02-12 00:55:34 -0800 | [diff] [blame] | 5541 | static const struct file_operations osst_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5542 | .owner = THIS_MODULE, |
| 5543 | .read = osst_read, |
| 5544 | .write = osst_write, |
| 5545 | .ioctl = osst_ioctl, |
| 5546 | #ifdef CONFIG_COMPAT |
| 5547 | .compat_ioctl = osst_compat_ioctl, |
| 5548 | #endif |
| 5549 | .open = os_scsi_tape_open, |
| 5550 | .flush = os_scsi_tape_flush, |
| 5551 | .release = os_scsi_tape_close, |
| 5552 | }; |
| 5553 | |
| 5554 | static int osst_supports(struct scsi_device * SDp) |
| 5555 | { |
| 5556 | struct osst_support_data { |
| 5557 | char *vendor; |
| 5558 | char *model; |
| 5559 | char *rev; |
| 5560 | char *driver_hint; /* Name of the correct driver, NULL if unknown */ |
| 5561 | }; |
| 5562 | |
| 5563 | static struct osst_support_data support_list[] = { |
| 5564 | /* {"XXX", "Yy-", "", NULL}, example */ |
| 5565 | SIGS_FROM_OSST, |
| 5566 | {NULL, }}; |
| 5567 | |
| 5568 | struct osst_support_data *rp; |
| 5569 | |
| 5570 | /* We are willing to drive OnStream SC-x0 as well as the |
| 5571 | * * IDE, ParPort, FireWire, USB variants, if accessible by |
| 5572 | * * emulation layer (ide-scsi, usb-storage, ...) */ |
| 5573 | |
| 5574 | for (rp=&(support_list[0]); rp->vendor != NULL; rp++) |
| 5575 | if (!strncmp(rp->vendor, SDp->vendor, strlen(rp->vendor)) && |
| 5576 | !strncmp(rp->model, SDp->model, strlen(rp->model)) && |
| 5577 | !strncmp(rp->rev, SDp->rev, strlen(rp->rev))) |
| 5578 | return 1; |
| 5579 | return 0; |
| 5580 | } |
| 5581 | |
| 5582 | /* |
| 5583 | * sysfs support for osst driver parameter information |
| 5584 | */ |
| 5585 | |
| 5586 | static ssize_t osst_version_show(struct device_driver *ddd, char *buf) |
| 5587 | { |
| 5588 | return snprintf(buf, PAGE_SIZE, "%s\n", osst_version); |
| 5589 | } |
| 5590 | |
| 5591 | static DRIVER_ATTR(version, S_IRUGO, osst_version_show, NULL); |
| 5592 | |
Robert P. J. Day | 405ae7d | 2007-02-17 19:13:42 +0100 | [diff] [blame] | 5593 | static int osst_create_sysfs_files(struct device_driver *sysfs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5594 | { |
Robert P. J. Day | 405ae7d | 2007-02-17 19:13:42 +0100 | [diff] [blame] | 5595 | return driver_create_file(sysfs, &driver_attr_version); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5596 | } |
| 5597 | |
Robert P. J. Day | 405ae7d | 2007-02-17 19:13:42 +0100 | [diff] [blame] | 5598 | static void osst_remove_sysfs_files(struct device_driver *sysfs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5599 | { |
Robert P. J. Day | 405ae7d | 2007-02-17 19:13:42 +0100 | [diff] [blame] | 5600 | driver_remove_file(sysfs, &driver_attr_version); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5601 | } |
| 5602 | |
| 5603 | /* |
| 5604 | * sysfs support for accessing ADR header information |
| 5605 | */ |
| 5606 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 5607 | static ssize_t osst_adr_rev_show(struct device *dev, |
| 5608 | struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5609 | { |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 5610 | struct osst_tape * STp = (struct osst_tape *) dev_get_drvdata (dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5611 | ssize_t l = 0; |
| 5612 | |
| 5613 | if (STp && STp->header_ok && STp->linux_media) |
| 5614 | l = snprintf(buf, PAGE_SIZE, "%d.%d\n", STp->header_cache->major_rev, STp->header_cache->minor_rev); |
| 5615 | return l; |
| 5616 | } |
| 5617 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 5618 | DEVICE_ATTR(ADR_rev, S_IRUGO, osst_adr_rev_show, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5619 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 5620 | static ssize_t osst_linux_media_version_show(struct device *dev, |
| 5621 | struct device_attribute *attr, |
| 5622 | char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5623 | { |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 5624 | struct osst_tape * STp = (struct osst_tape *) dev_get_drvdata (dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5625 | ssize_t l = 0; |
| 5626 | |
| 5627 | if (STp && STp->header_ok && STp->linux_media) |
| 5628 | l = snprintf(buf, PAGE_SIZE, "LIN%d\n", STp->linux_media_version); |
| 5629 | return l; |
| 5630 | } |
| 5631 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 5632 | DEVICE_ATTR(media_version, S_IRUGO, osst_linux_media_version_show, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5633 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 5634 | static ssize_t osst_capacity_show(struct device *dev, |
| 5635 | struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5636 | { |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 5637 | struct osst_tape * STp = (struct osst_tape *) dev_get_drvdata (dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5638 | ssize_t l = 0; |
| 5639 | |
| 5640 | if (STp && STp->header_ok && STp->linux_media) |
| 5641 | l = snprintf(buf, PAGE_SIZE, "%d\n", STp->capacity); |
| 5642 | return l; |
| 5643 | } |
| 5644 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 5645 | DEVICE_ATTR(capacity, S_IRUGO, osst_capacity_show, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5646 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 5647 | static ssize_t osst_first_data_ppos_show(struct device *dev, |
| 5648 | struct device_attribute *attr, |
| 5649 | char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5650 | { |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 5651 | struct osst_tape * STp = (struct osst_tape *) dev_get_drvdata (dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5652 | ssize_t l = 0; |
| 5653 | |
| 5654 | if (STp && STp->header_ok && STp->linux_media) |
| 5655 | l = snprintf(buf, PAGE_SIZE, "%d\n", STp->first_data_ppos); |
| 5656 | return l; |
| 5657 | } |
| 5658 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 5659 | DEVICE_ATTR(BOT_frame, S_IRUGO, osst_first_data_ppos_show, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5660 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 5661 | static ssize_t osst_eod_frame_ppos_show(struct device *dev, |
| 5662 | struct device_attribute *attr, |
| 5663 | char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5664 | { |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 5665 | struct osst_tape * STp = (struct osst_tape *) dev_get_drvdata (dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5666 | ssize_t l = 0; |
| 5667 | |
| 5668 | if (STp && STp->header_ok && STp->linux_media) |
| 5669 | l = snprintf(buf, PAGE_SIZE, "%d\n", STp->eod_frame_ppos); |
| 5670 | return l; |
| 5671 | } |
| 5672 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 5673 | DEVICE_ATTR(EOD_frame, S_IRUGO, osst_eod_frame_ppos_show, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5674 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 5675 | static ssize_t osst_filemark_cnt_show(struct device *dev, |
| 5676 | struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5677 | { |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 5678 | struct osst_tape * STp = (struct osst_tape *) dev_get_drvdata (dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5679 | ssize_t l = 0; |
| 5680 | |
| 5681 | if (STp && STp->header_ok && STp->linux_media) |
| 5682 | l = snprintf(buf, PAGE_SIZE, "%d\n", STp->filemark_cnt); |
| 5683 | return l; |
| 5684 | } |
| 5685 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 5686 | DEVICE_ATTR(file_count, S_IRUGO, osst_filemark_cnt_show, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5687 | |
gregkh@suse.de | d253878 | 2005-03-23 09:55:22 -0800 | [diff] [blame] | 5688 | static struct class *osst_sysfs_class; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5689 | |
Jeff Garzik | 37e0333 | 2006-10-04 05:23:04 -0400 | [diff] [blame] | 5690 | static int osst_sysfs_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5691 | { |
gregkh@suse.de | d253878 | 2005-03-23 09:55:22 -0800 | [diff] [blame] | 5692 | osst_sysfs_class = class_create(THIS_MODULE, "onstream_tape"); |
Jeff Garzik | 37e0333 | 2006-10-04 05:23:04 -0400 | [diff] [blame] | 5693 | if (IS_ERR(osst_sysfs_class)) { |
| 5694 | printk(KERN_ERR "osst :W: Unable to register sysfs class\n"); |
| 5695 | return PTR_ERR(osst_sysfs_class); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5696 | } |
Jeff Garzik | 37e0333 | 2006-10-04 05:23:04 -0400 | [diff] [blame] | 5697 | |
| 5698 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5699 | } |
| 5700 | |
| 5701 | static void osst_sysfs_destroy(dev_t dev) |
| 5702 | { |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 5703 | device_destroy(osst_sysfs_class, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5704 | } |
| 5705 | |
Jeff Garzik | 37e0333 | 2006-10-04 05:23:04 -0400 | [diff] [blame] | 5706 | static int osst_sysfs_add(dev_t dev, struct device *device, struct osst_tape * STp, char * name) |
| 5707 | { |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 5708 | struct device *osst_member; |
Jeff Garzik | 37e0333 | 2006-10-04 05:23:04 -0400 | [diff] [blame] | 5709 | int err; |
| 5710 | |
Greg Kroah-Hartman | d73a1a67 | 2008-07-21 20:03:34 -0700 | [diff] [blame] | 5711 | osst_member = device_create(osst_sysfs_class, device, dev, STp, |
| 5712 | "%s", name); |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 5713 | if (IS_ERR(osst_member)) { |
Jeff Garzik | 37e0333 | 2006-10-04 05:23:04 -0400 | [diff] [blame] | 5714 | printk(KERN_WARNING "osst :W: Unable to add sysfs class member %s\n", name); |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 5715 | return PTR_ERR(osst_member); |
Jeff Garzik | 37e0333 | 2006-10-04 05:23:04 -0400 | [diff] [blame] | 5716 | } |
| 5717 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 5718 | err = device_create_file(osst_member, &dev_attr_ADR_rev); |
Jeff Garzik | 37e0333 | 2006-10-04 05:23:04 -0400 | [diff] [blame] | 5719 | if (err) |
| 5720 | goto err_out; |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 5721 | err = device_create_file(osst_member, &dev_attr_media_version); |
Jeff Garzik | 37e0333 | 2006-10-04 05:23:04 -0400 | [diff] [blame] | 5722 | if (err) |
| 5723 | goto err_out; |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 5724 | err = device_create_file(osst_member, &dev_attr_capacity); |
Jeff Garzik | 37e0333 | 2006-10-04 05:23:04 -0400 | [diff] [blame] | 5725 | if (err) |
| 5726 | goto err_out; |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 5727 | err = device_create_file(osst_member, &dev_attr_BOT_frame); |
Jeff Garzik | 37e0333 | 2006-10-04 05:23:04 -0400 | [diff] [blame] | 5728 | if (err) |
| 5729 | goto err_out; |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 5730 | err = device_create_file(osst_member, &dev_attr_EOD_frame); |
Jeff Garzik | 37e0333 | 2006-10-04 05:23:04 -0400 | [diff] [blame] | 5731 | if (err) |
| 5732 | goto err_out; |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 5733 | err = device_create_file(osst_member, &dev_attr_file_count); |
Jeff Garzik | 37e0333 | 2006-10-04 05:23:04 -0400 | [diff] [blame] | 5734 | if (err) |
| 5735 | goto err_out; |
| 5736 | |
| 5737 | return 0; |
| 5738 | |
| 5739 | err_out: |
| 5740 | osst_sysfs_destroy(dev); |
| 5741 | return err; |
| 5742 | } |
| 5743 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5744 | static void osst_sysfs_cleanup(void) |
| 5745 | { |
Jeff Garzik | 37e0333 | 2006-10-04 05:23:04 -0400 | [diff] [blame] | 5746 | class_destroy(osst_sysfs_class); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5747 | } |
| 5748 | |
| 5749 | /* |
| 5750 | * osst startup / cleanup code |
| 5751 | */ |
| 5752 | |
| 5753 | static int osst_probe(struct device *dev) |
| 5754 | { |
| 5755 | struct scsi_device * SDp = to_scsi_device(dev); |
| 5756 | struct osst_tape * tpnt; |
| 5757 | struct st_modedef * STm; |
| 5758 | struct st_partstat * STps; |
| 5759 | struct osst_buffer * buffer; |
| 5760 | struct gendisk * drive; |
Jeff Garzik | 37e0333 | 2006-10-04 05:23:04 -0400 | [diff] [blame] | 5761 | int i, dev_num, err = -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5762 | |
| 5763 | if (SDp->type != TYPE_TAPE || !osst_supports(SDp)) |
| 5764 | return -ENODEV; |
| 5765 | |
| 5766 | drive = alloc_disk(1); |
| 5767 | if (!drive) { |
| 5768 | printk(KERN_ERR "osst :E: Out of memory. Device not attached.\n"); |
| 5769 | return -ENODEV; |
| 5770 | } |
| 5771 | |
| 5772 | /* if this is the first attach, build the infrastructure */ |
| 5773 | write_lock(&os_scsi_tapes_lock); |
| 5774 | if (os_scsi_tapes == NULL) { |
| 5775 | os_scsi_tapes = |
| 5776 | (struct osst_tape **)kmalloc(osst_max_dev * sizeof(struct osst_tape *), |
| 5777 | GFP_ATOMIC); |
| 5778 | if (os_scsi_tapes == NULL) { |
| 5779 | write_unlock(&os_scsi_tapes_lock); |
| 5780 | printk(KERN_ERR "osst :E: Unable to allocate array for OnStream SCSI tapes.\n"); |
| 5781 | goto out_put_disk; |
| 5782 | } |
| 5783 | for (i=0; i < osst_max_dev; ++i) os_scsi_tapes[i] = NULL; |
| 5784 | } |
| 5785 | |
| 5786 | if (osst_nr_dev >= osst_max_dev) { |
| 5787 | write_unlock(&os_scsi_tapes_lock); |
| 5788 | printk(KERN_ERR "osst :E: Too many tape devices (max. %d).\n", osst_max_dev); |
| 5789 | goto out_put_disk; |
| 5790 | } |
| 5791 | |
| 5792 | /* find a free minor number */ |
| 5793 | for (i=0; os_scsi_tapes[i] && i<osst_max_dev; i++); |
| 5794 | if(i >= osst_max_dev) panic ("Scsi_devices corrupt (osst)"); |
| 5795 | dev_num = i; |
| 5796 | |
| 5797 | /* allocate a struct osst_tape for this device */ |
Mariusz Kozlowski | bbfbbbc | 2007-08-11 10:13:24 +0200 | [diff] [blame] | 5798 | tpnt = kzalloc(sizeof(struct osst_tape), GFP_ATOMIC); |
| 5799 | if (!tpnt) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5800 | write_unlock(&os_scsi_tapes_lock); |
| 5801 | printk(KERN_ERR "osst :E: Can't allocate device descriptor, device not attached.\n"); |
| 5802 | goto out_put_disk; |
| 5803 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5804 | |
| 5805 | /* allocate a buffer for this device */ |
| 5806 | i = SDp->host->sg_tablesize; |
| 5807 | if (osst_max_sg_segs < i) |
| 5808 | i = osst_max_sg_segs; |
| 5809 | buffer = new_tape_buffer(1, SDp->host->unchecked_isa_dma, i); |
| 5810 | if (buffer == NULL) { |
| 5811 | write_unlock(&os_scsi_tapes_lock); |
| 5812 | printk(KERN_ERR "osst :E: Unable to allocate a tape buffer, device not attached.\n"); |
| 5813 | kfree(tpnt); |
| 5814 | goto out_put_disk; |
| 5815 | } |
| 5816 | os_scsi_tapes[dev_num] = tpnt; |
| 5817 | tpnt->buffer = buffer; |
| 5818 | tpnt->device = SDp; |
| 5819 | drive->private_data = &tpnt->driver; |
| 5820 | sprintf(drive->disk_name, "osst%d", dev_num); |
| 5821 | tpnt->driver = &osst_template; |
| 5822 | tpnt->drive = drive; |
| 5823 | tpnt->in_use = 0; |
| 5824 | tpnt->capacity = 0xfffff; |
| 5825 | tpnt->dirty = 0; |
| 5826 | tpnt->drv_buffer = 1; /* Try buffering if no mode sense */ |
| 5827 | tpnt->restr_dma = (SDp->host)->unchecked_isa_dma; |
| 5828 | tpnt->density = 0; |
| 5829 | tpnt->do_auto_lock = OSST_AUTO_LOCK; |
| 5830 | tpnt->can_bsr = OSST_IN_FILE_POS; |
| 5831 | tpnt->can_partitions = 0; |
| 5832 | tpnt->two_fm = OSST_TWO_FM; |
| 5833 | tpnt->fast_mteom = OSST_FAST_MTEOM; |
| 5834 | tpnt->scsi2_logical = OSST_SCSI2LOGICAL; /* FIXME */ |
| 5835 | tpnt->write_threshold = osst_write_threshold; |
| 5836 | tpnt->default_drvbuffer = 0xff; /* No forced buffering */ |
| 5837 | tpnt->partition = 0; |
| 5838 | tpnt->new_partition = 0; |
| 5839 | tpnt->nbr_partitions = 0; |
| 5840 | tpnt->min_block = 512; |
| 5841 | tpnt->max_block = OS_DATA_SIZE; |
| 5842 | tpnt->timeout = OSST_TIMEOUT; |
| 5843 | tpnt->long_timeout = OSST_LONG_TIMEOUT; |
| 5844 | |
| 5845 | /* Recognize OnStream tapes */ |
| 5846 | /* We don't need to test for OnStream, as this has been done in detect () */ |
| 5847 | tpnt->os_fw_rev = osst_parse_firmware_rev (SDp->rev); |
| 5848 | tpnt->omit_blklims = 1; |
| 5849 | |
| 5850 | tpnt->poll = (strncmp(SDp->model, "DI-", 3) == 0) || |
| 5851 | (strncmp(SDp->model, "FW-", 3) == 0) || OSST_FW_NEED_POLL(tpnt->os_fw_rev,SDp); |
| 5852 | tpnt->frame_in_buffer = 0; |
| 5853 | tpnt->header_ok = 0; |
| 5854 | tpnt->linux_media = 0; |
| 5855 | tpnt->header_cache = NULL; |
| 5856 | |
| 5857 | for (i=0; i < ST_NBR_MODES; i++) { |
| 5858 | STm = &(tpnt->modes[i]); |
| 5859 | STm->defined = 0; |
| 5860 | STm->sysv = OSST_SYSV; |
| 5861 | STm->defaults_for_writes = 0; |
| 5862 | STm->do_async_writes = OSST_ASYNC_WRITES; |
| 5863 | STm->do_buffer_writes = OSST_BUFFER_WRITES; |
| 5864 | STm->do_read_ahead = OSST_READ_AHEAD; |
| 5865 | STm->default_compression = ST_DONT_TOUCH; |
| 5866 | STm->default_blksize = 512; |
| 5867 | STm->default_density = (-1); /* No forced density */ |
| 5868 | } |
| 5869 | |
| 5870 | for (i=0; i < ST_NBR_PARTITIONS; i++) { |
| 5871 | STps = &(tpnt->ps[i]); |
| 5872 | STps->rw = ST_IDLE; |
| 5873 | STps->eof = ST_NOEOF; |
| 5874 | STps->at_sm = 0; |
| 5875 | STps->last_block_valid = 0; |
| 5876 | STps->drv_block = (-1); |
| 5877 | STps->drv_file = (-1); |
| 5878 | } |
| 5879 | |
| 5880 | tpnt->current_mode = 0; |
| 5881 | tpnt->modes[0].defined = 1; |
| 5882 | tpnt->modes[2].defined = 1; |
| 5883 | tpnt->density_changed = tpnt->compression_changed = tpnt->blksize_changed = 0; |
| 5884 | |
Matthias Kaehlcke | 4390e60 | 2007-08-10 14:50:44 -0700 | [diff] [blame] | 5885 | mutex_init(&tpnt->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5886 | osst_nr_dev++; |
| 5887 | write_unlock(&os_scsi_tapes_lock); |
Jeff Garzik | 37e0333 | 2006-10-04 05:23:04 -0400 | [diff] [blame] | 5888 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5889 | { |
| 5890 | char name[8]; |
Jeff Garzik | 37e0333 | 2006-10-04 05:23:04 -0400 | [diff] [blame] | 5891 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5892 | /* Rewind entry */ |
Jeff Garzik | 37e0333 | 2006-10-04 05:23:04 -0400 | [diff] [blame] | 5893 | err = osst_sysfs_add(MKDEV(OSST_MAJOR, dev_num), dev, tpnt, tape_name(tpnt)); |
| 5894 | if (err) |
| 5895 | goto out_free_buffer; |
| 5896 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5897 | /* No-rewind entry */ |
| 5898 | snprintf(name, 8, "%s%s", "n", tape_name(tpnt)); |
Jeff Garzik | 37e0333 | 2006-10-04 05:23:04 -0400 | [diff] [blame] | 5899 | err = osst_sysfs_add(MKDEV(OSST_MAJOR, dev_num + 128), dev, tpnt, name); |
| 5900 | if (err) |
| 5901 | goto out_free_sysfs1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5902 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5903 | |
James Bottomley | 80e23ba | 2005-10-29 09:42:17 -0500 | [diff] [blame] | 5904 | sdev_printk(KERN_INFO, SDp, |
James Bottomley | 9ccfc75 | 2005-10-02 11:45:08 -0500 | [diff] [blame] | 5905 | "osst :I: Attached OnStream %.5s tape as %s\n", |
| 5906 | SDp->model, tape_name(tpnt)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5907 | |
| 5908 | return 0; |
| 5909 | |
Jeff Garzik | 37e0333 | 2006-10-04 05:23:04 -0400 | [diff] [blame] | 5910 | out_free_sysfs1: |
| 5911 | osst_sysfs_destroy(MKDEV(OSST_MAJOR, dev_num)); |
| 5912 | out_free_buffer: |
| 5913 | kfree(buffer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5914 | out_put_disk: |
| 5915 | put_disk(drive); |
Jeff Garzik | 37e0333 | 2006-10-04 05:23:04 -0400 | [diff] [blame] | 5916 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5917 | }; |
| 5918 | |
| 5919 | static int osst_remove(struct device *dev) |
| 5920 | { |
| 5921 | struct scsi_device * SDp = to_scsi_device(dev); |
| 5922 | struct osst_tape * tpnt; |
Greg KH | 5e3c34c | 2006-01-18 16:17:46 -0800 | [diff] [blame] | 5923 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5924 | |
| 5925 | if ((SDp->type != TYPE_TAPE) || (osst_nr_dev <= 0)) |
| 5926 | return 0; |
| 5927 | |
| 5928 | write_lock(&os_scsi_tapes_lock); |
| 5929 | for(i=0; i < osst_max_dev; i++) { |
| 5930 | if((tpnt = os_scsi_tapes[i]) && (tpnt->device == SDp)) { |
| 5931 | osst_sysfs_destroy(MKDEV(OSST_MAJOR, i)); |
| 5932 | osst_sysfs_destroy(MKDEV(OSST_MAJOR, i+128)); |
| 5933 | tpnt->device = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5934 | put_disk(tpnt->drive); |
| 5935 | os_scsi_tapes[i] = NULL; |
| 5936 | osst_nr_dev--; |
| 5937 | write_unlock(&os_scsi_tapes_lock); |
Jesper Juhl | f9101210 | 2005-09-10 00:26:54 -0700 | [diff] [blame] | 5938 | vfree(tpnt->header_cache); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5939 | if (tpnt->buffer) { |
| 5940 | normalize_buffer(tpnt->buffer); |
| 5941 | kfree(tpnt->buffer); |
| 5942 | } |
| 5943 | kfree(tpnt); |
| 5944 | return 0; |
| 5945 | } |
| 5946 | } |
| 5947 | write_unlock(&os_scsi_tapes_lock); |
| 5948 | return 0; |
| 5949 | } |
| 5950 | |
| 5951 | static int __init init_osst(void) |
| 5952 | { |
Jeff Garzik | 37e0333 | 2006-10-04 05:23:04 -0400 | [diff] [blame] | 5953 | int err; |
| 5954 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5955 | printk(KERN_INFO "osst :I: Tape driver with OnStream support version %s\nosst :I: %s\n", osst_version, cvsid); |
| 5956 | |
| 5957 | validate_options(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5958 | |
Jeff Garzik | 37e0333 | 2006-10-04 05:23:04 -0400 | [diff] [blame] | 5959 | err = osst_sysfs_init(); |
| 5960 | if (err) |
| 5961 | return err; |
| 5962 | |
| 5963 | err = register_chrdev(OSST_MAJOR, "osst", &osst_fops); |
| 5964 | if (err < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5965 | printk(KERN_ERR "osst :E: Unable to register major %d for OnStream tapes\n", OSST_MAJOR); |
Jeff Garzik | 37e0333 | 2006-10-04 05:23:04 -0400 | [diff] [blame] | 5966 | goto err_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5967 | } |
Jeff Garzik | 37e0333 | 2006-10-04 05:23:04 -0400 | [diff] [blame] | 5968 | |
| 5969 | err = scsi_register_driver(&osst_template.gendrv); |
| 5970 | if (err) |
| 5971 | goto err_out_chrdev; |
| 5972 | |
Robert P. J. Day | 405ae7d | 2007-02-17 19:13:42 +0100 | [diff] [blame] | 5973 | err = osst_create_sysfs_files(&osst_template.gendrv); |
Jeff Garzik | 37e0333 | 2006-10-04 05:23:04 -0400 | [diff] [blame] | 5974 | if (err) |
| 5975 | goto err_out_scsidrv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5976 | |
| 5977 | return 0; |
Jeff Garzik | 37e0333 | 2006-10-04 05:23:04 -0400 | [diff] [blame] | 5978 | |
| 5979 | err_out_scsidrv: |
| 5980 | scsi_unregister_driver(&osst_template.gendrv); |
| 5981 | err_out_chrdev: |
| 5982 | unregister_chrdev(OSST_MAJOR, "osst"); |
| 5983 | err_out: |
| 5984 | osst_sysfs_cleanup(); |
| 5985 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5986 | } |
| 5987 | |
| 5988 | static void __exit exit_osst (void) |
| 5989 | { |
| 5990 | int i; |
| 5991 | struct osst_tape * STp; |
| 5992 | |
Robert P. J. Day | 405ae7d | 2007-02-17 19:13:42 +0100 | [diff] [blame] | 5993 | osst_remove_sysfs_files(&osst_template.gendrv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5994 | scsi_unregister_driver(&osst_template.gendrv); |
| 5995 | unregister_chrdev(OSST_MAJOR, "osst"); |
| 5996 | osst_sysfs_cleanup(); |
| 5997 | |
| 5998 | if (os_scsi_tapes) { |
| 5999 | for (i=0; i < osst_max_dev; ++i) { |
| 6000 | if (!(STp = os_scsi_tapes[i])) continue; |
| 6001 | /* This is defensive, supposed to happen during detach */ |
Jesper Juhl | f9101210 | 2005-09-10 00:26:54 -0700 | [diff] [blame] | 6002 | vfree(STp->header_cache); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6003 | if (STp->buffer) { |
| 6004 | normalize_buffer(STp->buffer); |
| 6005 | kfree(STp->buffer); |
| 6006 | } |
| 6007 | put_disk(STp->drive); |
| 6008 | kfree(STp); |
| 6009 | } |
| 6010 | kfree(os_scsi_tapes); |
| 6011 | } |
| 6012 | printk(KERN_INFO "osst :I: Unloaded.\n"); |
| 6013 | } |
| 6014 | |
| 6015 | module_init(init_osst); |
| 6016 | module_exit(exit_osst); |