Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1 | /* -*- mode: c; c-basic-offset: 8; -*- |
| 2 | * vim: noexpandtab sw=8 ts=8 sts=0: |
| 3 | * |
| 4 | * file.c |
| 5 | * |
| 6 | * File open, close, extend, truncate |
| 7 | * |
| 8 | * Copyright (C) 2002, 2004 Oracle. All rights reserved. |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or |
| 11 | * modify it under the terms of the GNU General Public |
| 12 | * License as published by the Free Software Foundation; either |
| 13 | * version 2 of the License, or (at your option) any later version. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 18 | * General Public License for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU General Public |
| 21 | * License along with this program; if not, write to the |
| 22 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 23 | * Boston, MA 021110-1307, USA. |
| 24 | */ |
| 25 | |
Randy Dunlap | 16f7e0f | 2006-01-11 12:17:46 -0800 | [diff] [blame] | 26 | #include <linux/capability.h> |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 27 | #include <linux/fs.h> |
| 28 | #include <linux/types.h> |
| 29 | #include <linux/slab.h> |
| 30 | #include <linux/highmem.h> |
| 31 | #include <linux/pagemap.h> |
| 32 | #include <linux/uio.h> |
Mark Fasheh | e2057c5 | 2006-10-03 17:53:05 -0700 | [diff] [blame] | 33 | #include <linux/sched.h> |
Jens Axboe | d6b29d7 | 2007-06-04 09:59:47 +0200 | [diff] [blame] | 34 | #include <linux/splice.h> |
Tiger Yang | 7f1a37e | 2006-11-15 15:48:42 +0800 | [diff] [blame] | 35 | #include <linux/mount.h> |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 36 | #include <linux/writeback.h> |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 37 | #include <linux/falloc.h> |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 38 | #include <linux/quotaops.h> |
Jan Kara | 04eda1a | 2010-08-05 20:32:45 +0200 | [diff] [blame] | 39 | #include <linux/blkdev.h> |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 40 | |
| 41 | #define MLOG_MASK_PREFIX ML_INODE |
| 42 | #include <cluster/masklog.h> |
| 43 | |
| 44 | #include "ocfs2.h" |
| 45 | |
| 46 | #include "alloc.h" |
| 47 | #include "aops.h" |
| 48 | #include "dir.h" |
| 49 | #include "dlmglue.h" |
| 50 | #include "extent_map.h" |
| 51 | #include "file.h" |
| 52 | #include "sysfile.h" |
| 53 | #include "inode.h" |
Herbert Poetzl | ca4d147 | 2006-07-03 17:27:12 -0700 | [diff] [blame] | 54 | #include "ioctl.h" |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 55 | #include "journal.h" |
Mark Fasheh | 53fc622 | 2007-12-20 16:49:04 -0800 | [diff] [blame] | 56 | #include "locks.h" |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 57 | #include "mmap.h" |
| 58 | #include "suballoc.h" |
| 59 | #include "super.h" |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 60 | #include "xattr.h" |
Tiger Yang | 23fc270 | 2008-11-14 11:17:18 +0800 | [diff] [blame] | 61 | #include "acl.h" |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 62 | #include "quota.h" |
Tao Ma | 293b2f7 | 2009-08-25 08:02:48 +0800 | [diff] [blame] | 63 | #include "refcounttree.h" |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 64 | |
| 65 | #include "buffer_head_io.h" |
| 66 | |
Mark Fasheh | 53fc622 | 2007-12-20 16:49:04 -0800 | [diff] [blame] | 67 | static int ocfs2_init_file_private(struct inode *inode, struct file *file) |
| 68 | { |
| 69 | struct ocfs2_file_private *fp; |
| 70 | |
| 71 | fp = kzalloc(sizeof(struct ocfs2_file_private), GFP_KERNEL); |
| 72 | if (!fp) |
| 73 | return -ENOMEM; |
| 74 | |
| 75 | fp->fp_file = file; |
| 76 | mutex_init(&fp->fp_mutex); |
| 77 | ocfs2_file_lock_res_init(&fp->fp_flock, fp); |
| 78 | file->private_data = fp; |
| 79 | |
| 80 | return 0; |
| 81 | } |
| 82 | |
| 83 | static void ocfs2_free_file_private(struct inode *inode, struct file *file) |
| 84 | { |
| 85 | struct ocfs2_file_private *fp = file->private_data; |
| 86 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 87 | |
| 88 | if (fp) { |
| 89 | ocfs2_simple_drop_lockres(osb, &fp->fp_flock); |
| 90 | ocfs2_lock_res_free(&fp->fp_flock); |
| 91 | kfree(fp); |
| 92 | file->private_data = NULL; |
| 93 | } |
| 94 | } |
| 95 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 96 | static int ocfs2_file_open(struct inode *inode, struct file *file) |
| 97 | { |
| 98 | int status; |
| 99 | int mode = file->f_flags; |
| 100 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
| 101 | |
| 102 | mlog_entry("(0x%p, 0x%p, '%.*s')\n", inode, file, |
Josef Sipek | d28c917 | 2006-12-08 02:37:25 -0800 | [diff] [blame] | 103 | file->f_path.dentry->d_name.len, file->f_path.dentry->d_name.name); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 104 | |
Christoph Hellwig | 907f455 | 2010-03-03 09:05:06 -0500 | [diff] [blame] | 105 | if (file->f_mode & FMODE_WRITE) |
Christoph Hellwig | 871a293 | 2010-03-03 09:05:07 -0500 | [diff] [blame] | 106 | dquot_initialize(inode); |
Christoph Hellwig | 907f455 | 2010-03-03 09:05:06 -0500 | [diff] [blame] | 107 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 108 | spin_lock(&oi->ip_lock); |
| 109 | |
| 110 | /* Check that the inode hasn't been wiped from disk by another |
| 111 | * node. If it hasn't then we're safe as long as we hold the |
| 112 | * spin lock until our increment of open count. */ |
| 113 | if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED) { |
| 114 | spin_unlock(&oi->ip_lock); |
| 115 | |
| 116 | status = -ENOENT; |
| 117 | goto leave; |
| 118 | } |
| 119 | |
| 120 | if (mode & O_DIRECT) |
| 121 | oi->ip_flags |= OCFS2_INODE_OPEN_DIRECT; |
| 122 | |
| 123 | oi->ip_open_count++; |
| 124 | spin_unlock(&oi->ip_lock); |
Mark Fasheh | 53fc622 | 2007-12-20 16:49:04 -0800 | [diff] [blame] | 125 | |
| 126 | status = ocfs2_init_file_private(inode, file); |
| 127 | if (status) { |
| 128 | /* |
| 129 | * We want to set open count back if we're failing the |
| 130 | * open. |
| 131 | */ |
| 132 | spin_lock(&oi->ip_lock); |
| 133 | oi->ip_open_count--; |
| 134 | spin_unlock(&oi->ip_lock); |
| 135 | } |
| 136 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 137 | leave: |
| 138 | mlog_exit(status); |
| 139 | return status; |
| 140 | } |
| 141 | |
| 142 | static int ocfs2_file_release(struct inode *inode, struct file *file) |
| 143 | { |
| 144 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
| 145 | |
| 146 | mlog_entry("(0x%p, 0x%p, '%.*s')\n", inode, file, |
Josef Sipek | d28c917 | 2006-12-08 02:37:25 -0800 | [diff] [blame] | 147 | file->f_path.dentry->d_name.len, |
| 148 | file->f_path.dentry->d_name.name); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 149 | |
| 150 | spin_lock(&oi->ip_lock); |
| 151 | if (!--oi->ip_open_count) |
| 152 | oi->ip_flags &= ~OCFS2_INODE_OPEN_DIRECT; |
| 153 | spin_unlock(&oi->ip_lock); |
| 154 | |
Mark Fasheh | 53fc622 | 2007-12-20 16:49:04 -0800 | [diff] [blame] | 155 | ocfs2_free_file_private(inode, file); |
| 156 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 157 | mlog_exit(0); |
| 158 | |
| 159 | return 0; |
| 160 | } |
| 161 | |
Mark Fasheh | 53fc622 | 2007-12-20 16:49:04 -0800 | [diff] [blame] | 162 | static int ocfs2_dir_open(struct inode *inode, struct file *file) |
| 163 | { |
| 164 | return ocfs2_init_file_private(inode, file); |
| 165 | } |
| 166 | |
| 167 | static int ocfs2_dir_release(struct inode *inode, struct file *file) |
| 168 | { |
| 169 | ocfs2_free_file_private(inode, file); |
| 170 | return 0; |
| 171 | } |
| 172 | |
Christoph Hellwig | 7ea8085 | 2010-05-26 17:53:25 +0200 | [diff] [blame] | 173 | static int ocfs2_sync_file(struct file *file, int datasync) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 174 | { |
| 175 | int err = 0; |
| 176 | journal_t *journal; |
Christoph Hellwig | 7ea8085 | 2010-05-26 17:53:25 +0200 | [diff] [blame] | 177 | struct inode *inode = file->f_mapping->host; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 178 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 179 | |
Joel Becker | c0e1a3e | 2010-09-15 16:56:54 -0700 | [diff] [blame] | 180 | mlog_entry("(0x%p, %d, 0x%p, '%.*s')\n", file, datasync, |
| 181 | file->f_path.dentry, file->f_path.dentry->d_name.len, |
| 182 | file->f_path.dentry->d_name.name); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 183 | |
Jan Kara | 04eda1a | 2010-08-05 20:32:45 +0200 | [diff] [blame] | 184 | if (datasync && !(inode->i_state & I_DIRTY_DATASYNC)) { |
| 185 | /* |
| 186 | * We still have to flush drive's caches to get data to the |
| 187 | * platter |
| 188 | */ |
| 189 | if (osb->s_mount_opt & OCFS2_MOUNT_BARRIER) |
Linus Torvalds | f8cae0f | 2010-10-22 19:30:38 -0700 | [diff] [blame] | 190 | blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL); |
Hisashi Hifumi | e04cc15 | 2009-06-09 16:47:45 +0900 | [diff] [blame] | 191 | goto bail; |
Jan Kara | 04eda1a | 2010-08-05 20:32:45 +0200 | [diff] [blame] | 192 | } |
Hisashi Hifumi | e04cc15 | 2009-06-09 16:47:45 +0900 | [diff] [blame] | 193 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 194 | journal = osb->journal->j_journal; |
Joel Becker | 2b4e30f | 2008-09-03 20:03:41 -0700 | [diff] [blame] | 195 | err = jbd2_journal_force_commit(journal); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 196 | |
| 197 | bail: |
| 198 | mlog_exit(err); |
| 199 | |
| 200 | return (err < 0) ? -EIO : 0; |
| 201 | } |
| 202 | |
Tiger Yang | 7f1a37e | 2006-11-15 15:48:42 +0800 | [diff] [blame] | 203 | int ocfs2_should_update_atime(struct inode *inode, |
| 204 | struct vfsmount *vfsmnt) |
| 205 | { |
| 206 | struct timespec now; |
| 207 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 208 | |
| 209 | if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb)) |
| 210 | return 0; |
| 211 | |
| 212 | if ((inode->i_flags & S_NOATIME) || |
| 213 | ((inode->i_sb->s_flags & MS_NODIRATIME) && S_ISDIR(inode->i_mode))) |
| 214 | return 0; |
| 215 | |
Mark Fasheh | 6c2aad0 | 2006-12-19 15:25:52 -0800 | [diff] [blame] | 216 | /* |
| 217 | * We can be called with no vfsmnt structure - NFSD will |
| 218 | * sometimes do this. |
| 219 | * |
| 220 | * Note that our action here is different than touch_atime() - |
| 221 | * if we can't tell whether this is a noatime mount, then we |
| 222 | * don't know whether to trust the value of s_atime_quantum. |
| 223 | */ |
| 224 | if (vfsmnt == NULL) |
| 225 | return 0; |
| 226 | |
Tiger Yang | 7f1a37e | 2006-11-15 15:48:42 +0800 | [diff] [blame] | 227 | if ((vfsmnt->mnt_flags & MNT_NOATIME) || |
| 228 | ((vfsmnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) |
| 229 | return 0; |
| 230 | |
Mark Fasheh | 7e913c5 | 2006-12-13 00:34:35 -0800 | [diff] [blame] | 231 | if (vfsmnt->mnt_flags & MNT_RELATIME) { |
| 232 | if ((timespec_compare(&inode->i_atime, &inode->i_mtime) <= 0) || |
| 233 | (timespec_compare(&inode->i_atime, &inode->i_ctime) <= 0)) |
| 234 | return 1; |
| 235 | |
| 236 | return 0; |
| 237 | } |
| 238 | |
Tiger Yang | 7f1a37e | 2006-11-15 15:48:42 +0800 | [diff] [blame] | 239 | now = CURRENT_TIME; |
| 240 | if ((now.tv_sec - inode->i_atime.tv_sec <= osb->s_atime_quantum)) |
| 241 | return 0; |
| 242 | else |
| 243 | return 1; |
| 244 | } |
| 245 | |
| 246 | int ocfs2_update_inode_atime(struct inode *inode, |
| 247 | struct buffer_head *bh) |
| 248 | { |
| 249 | int ret; |
| 250 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 251 | handle_t *handle; |
Mark Fasheh | c11e9fa | 2007-07-20 11:24:53 -0700 | [diff] [blame] | 252 | struct ocfs2_dinode *di = (struct ocfs2_dinode *) bh->b_data; |
Tiger Yang | 7f1a37e | 2006-11-15 15:48:42 +0800 | [diff] [blame] | 253 | |
| 254 | mlog_entry_void(); |
| 255 | |
| 256 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
Jan Kara | fa38e92 | 2008-10-20 19:23:51 +0200 | [diff] [blame] | 257 | if (IS_ERR(handle)) { |
| 258 | ret = PTR_ERR(handle); |
Tiger Yang | 7f1a37e | 2006-11-15 15:48:42 +0800 | [diff] [blame] | 259 | mlog_errno(ret); |
| 260 | goto out; |
| 261 | } |
| 262 | |
Joel Becker | 0cf2f76 | 2009-02-12 16:41:25 -0800 | [diff] [blame] | 263 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh, |
Joel Becker | 13723d0 | 2008-10-17 19:25:01 -0700 | [diff] [blame] | 264 | OCFS2_JOURNAL_ACCESS_WRITE); |
Mark Fasheh | c11e9fa | 2007-07-20 11:24:53 -0700 | [diff] [blame] | 265 | if (ret) { |
| 266 | mlog_errno(ret); |
| 267 | goto out_commit; |
| 268 | } |
| 269 | |
| 270 | /* |
| 271 | * Don't use ocfs2_mark_inode_dirty() here as we don't always |
| 272 | * have i_mutex to guard against concurrent changes to other |
| 273 | * inode fields. |
| 274 | */ |
Tiger Yang | 7f1a37e | 2006-11-15 15:48:42 +0800 | [diff] [blame] | 275 | inode->i_atime = CURRENT_TIME; |
Mark Fasheh | c11e9fa | 2007-07-20 11:24:53 -0700 | [diff] [blame] | 276 | di->i_atime = cpu_to_le64(inode->i_atime.tv_sec); |
| 277 | di->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec); |
Joel Becker | ec20cec | 2010-03-19 14:13:52 -0700 | [diff] [blame] | 278 | ocfs2_journal_dirty(handle, bh); |
Tiger Yang | 7f1a37e | 2006-11-15 15:48:42 +0800 | [diff] [blame] | 279 | |
Mark Fasheh | c11e9fa | 2007-07-20 11:24:53 -0700 | [diff] [blame] | 280 | out_commit: |
Tiger Yang | 7f1a37e | 2006-11-15 15:48:42 +0800 | [diff] [blame] | 281 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); |
| 282 | out: |
| 283 | mlog_exit(ret); |
| 284 | return ret; |
| 285 | } |
| 286 | |
Adrian Bunk | 6cb129f | 2007-04-26 00:29:35 -0700 | [diff] [blame] | 287 | static int ocfs2_set_inode_size(handle_t *handle, |
| 288 | struct inode *inode, |
| 289 | struct buffer_head *fe_bh, |
| 290 | u64 new_i_size) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 291 | { |
| 292 | int status; |
| 293 | |
| 294 | mlog_entry_void(); |
| 295 | i_size_write(inode, new_i_size); |
Mark Fasheh | 8110b07 | 2007-03-22 16:53:23 -0700 | [diff] [blame] | 296 | inode->i_blocks = ocfs2_inode_sector_count(inode); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 297 | inode->i_ctime = inode->i_mtime = CURRENT_TIME; |
| 298 | |
| 299 | status = ocfs2_mark_inode_dirty(handle, inode, fe_bh); |
| 300 | if (status < 0) { |
| 301 | mlog_errno(status); |
| 302 | goto bail; |
| 303 | } |
| 304 | |
| 305 | bail: |
| 306 | mlog_exit(status); |
| 307 | return status; |
| 308 | } |
| 309 | |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 310 | int ocfs2_simple_size_update(struct inode *inode, |
| 311 | struct buffer_head *di_bh, |
| 312 | u64 new_i_size) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 313 | { |
| 314 | int ret; |
| 315 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 316 | handle_t *handle = NULL; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 317 | |
Mark Fasheh | 65eff9c | 2006-10-09 17:26:22 -0700 | [diff] [blame] | 318 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
Jan Kara | fa38e92 | 2008-10-20 19:23:51 +0200 | [diff] [blame] | 319 | if (IS_ERR(handle)) { |
| 320 | ret = PTR_ERR(handle); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 321 | mlog_errno(ret); |
| 322 | goto out; |
| 323 | } |
| 324 | |
| 325 | ret = ocfs2_set_inode_size(handle, inode, di_bh, |
| 326 | new_i_size); |
| 327 | if (ret < 0) |
| 328 | mlog_errno(ret); |
| 329 | |
Mark Fasheh | 02dc1af | 2006-10-09 16:48:10 -0700 | [diff] [blame] | 330 | ocfs2_commit_trans(osb, handle); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 331 | out: |
| 332 | return ret; |
| 333 | } |
| 334 | |
Tao Ma | 37f8a2b | 2009-08-26 09:47:28 +0800 | [diff] [blame] | 335 | static int ocfs2_cow_file_pos(struct inode *inode, |
| 336 | struct buffer_head *fe_bh, |
| 337 | u64 offset) |
| 338 | { |
| 339 | int status; |
| 340 | u32 phys, cpos = offset >> OCFS2_SB(inode->i_sb)->s_clustersize_bits; |
| 341 | unsigned int num_clusters = 0; |
| 342 | unsigned int ext_flags = 0; |
| 343 | |
| 344 | /* |
| 345 | * If the new offset is aligned to the range of the cluster, there is |
| 346 | * no space for ocfs2_zero_range_for_truncate to fill, so no need to |
| 347 | * CoW either. |
| 348 | */ |
| 349 | if ((offset & (OCFS2_SB(inode->i_sb)->s_clustersize - 1)) == 0) |
| 350 | return 0; |
| 351 | |
| 352 | status = ocfs2_get_clusters(inode, cpos, &phys, |
| 353 | &num_clusters, &ext_flags); |
| 354 | if (status) { |
| 355 | mlog_errno(status); |
| 356 | goto out; |
| 357 | } |
| 358 | |
| 359 | if (!(ext_flags & OCFS2_EXT_REFCOUNTED)) |
| 360 | goto out; |
| 361 | |
Tao Ma | 1550271 | 2010-08-12 10:36:38 +0800 | [diff] [blame] | 362 | return ocfs2_refcount_cow(inode, NULL, fe_bh, cpos, 1, cpos+1); |
Tao Ma | 37f8a2b | 2009-08-26 09:47:28 +0800 | [diff] [blame] | 363 | |
| 364 | out: |
| 365 | return status; |
| 366 | } |
| 367 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 368 | static int ocfs2_orphan_for_truncate(struct ocfs2_super *osb, |
| 369 | struct inode *inode, |
| 370 | struct buffer_head *fe_bh, |
| 371 | u64 new_i_size) |
| 372 | { |
| 373 | int status; |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 374 | handle_t *handle; |
Mark Fasheh | 60b1139 | 2007-02-16 11:46:50 -0800 | [diff] [blame] | 375 | struct ocfs2_dinode *di; |
Mark Fasheh | 35edec1 | 2007-07-06 14:41:18 -0700 | [diff] [blame] | 376 | u64 cluster_bytes; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 377 | |
| 378 | mlog_entry_void(); |
| 379 | |
Tao Ma | 37f8a2b | 2009-08-26 09:47:28 +0800 | [diff] [blame] | 380 | /* |
| 381 | * We need to CoW the cluster contains the offset if it is reflinked |
| 382 | * since we will call ocfs2_zero_range_for_truncate later which will |
| 383 | * write "0" from offset to the end of the cluster. |
| 384 | */ |
| 385 | status = ocfs2_cow_file_pos(inode, fe_bh, new_i_size); |
| 386 | if (status) { |
| 387 | mlog_errno(status); |
| 388 | return status; |
| 389 | } |
| 390 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 391 | /* TODO: This needs to actually orphan the inode in this |
| 392 | * transaction. */ |
| 393 | |
Mark Fasheh | 65eff9c | 2006-10-09 17:26:22 -0700 | [diff] [blame] | 394 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 395 | if (IS_ERR(handle)) { |
| 396 | status = PTR_ERR(handle); |
| 397 | mlog_errno(status); |
| 398 | goto out; |
| 399 | } |
| 400 | |
Joel Becker | 0cf2f76 | 2009-02-12 16:41:25 -0800 | [diff] [blame] | 401 | status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh, |
Joel Becker | 13723d0 | 2008-10-17 19:25:01 -0700 | [diff] [blame] | 402 | OCFS2_JOURNAL_ACCESS_WRITE); |
Mark Fasheh | 60b1139 | 2007-02-16 11:46:50 -0800 | [diff] [blame] | 403 | if (status < 0) { |
| 404 | mlog_errno(status); |
| 405 | goto out_commit; |
| 406 | } |
| 407 | |
| 408 | /* |
| 409 | * Do this before setting i_size. |
| 410 | */ |
Mark Fasheh | 35edec1 | 2007-07-06 14:41:18 -0700 | [diff] [blame] | 411 | cluster_bytes = ocfs2_align_bytes_to_clusters(inode->i_sb, new_i_size); |
| 412 | status = ocfs2_zero_range_for_truncate(inode, handle, new_i_size, |
| 413 | cluster_bytes); |
Mark Fasheh | 60b1139 | 2007-02-16 11:46:50 -0800 | [diff] [blame] | 414 | if (status) { |
| 415 | mlog_errno(status); |
| 416 | goto out_commit; |
| 417 | } |
| 418 | |
| 419 | i_size_write(inode, new_i_size); |
Mark Fasheh | 60b1139 | 2007-02-16 11:46:50 -0800 | [diff] [blame] | 420 | inode->i_ctime = inode->i_mtime = CURRENT_TIME; |
| 421 | |
| 422 | di = (struct ocfs2_dinode *) fe_bh->b_data; |
| 423 | di->i_size = cpu_to_le64(new_i_size); |
| 424 | di->i_ctime = di->i_mtime = cpu_to_le64(inode->i_ctime.tv_sec); |
| 425 | di->i_ctime_nsec = di->i_mtime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); |
| 426 | |
Joel Becker | ec20cec | 2010-03-19 14:13:52 -0700 | [diff] [blame] | 427 | ocfs2_journal_dirty(handle, fe_bh); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 428 | |
Mark Fasheh | 60b1139 | 2007-02-16 11:46:50 -0800 | [diff] [blame] | 429 | out_commit: |
Mark Fasheh | 02dc1af | 2006-10-09 16:48:10 -0700 | [diff] [blame] | 430 | ocfs2_commit_trans(osb, handle); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 431 | out: |
Mark Fasheh | 60b1139 | 2007-02-16 11:46:50 -0800 | [diff] [blame] | 432 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 433 | mlog_exit(status); |
| 434 | return status; |
| 435 | } |
| 436 | |
| 437 | static int ocfs2_truncate_file(struct inode *inode, |
| 438 | struct buffer_head *di_bh, |
| 439 | u64 new_i_size) |
| 440 | { |
| 441 | int status = 0; |
| 442 | struct ocfs2_dinode *fe = NULL; |
| 443 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 444 | |
Mark Fasheh | b0697053 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 445 | mlog_entry("(inode = %llu, new_i_size = %llu\n", |
| 446 | (unsigned long long)OCFS2_I(inode)->ip_blkno, |
| 447 | (unsigned long long)new_i_size); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 448 | |
Joel Becker | b657c95 | 2008-11-13 14:49:11 -0800 | [diff] [blame] | 449 | /* We trust di_bh because it comes from ocfs2_inode_lock(), which |
| 450 | * already validated it */ |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 451 | fe = (struct ocfs2_dinode *) di_bh->b_data; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 452 | |
| 453 | mlog_bug_on_msg(le64_to_cpu(fe->i_size) != i_size_read(inode), |
Mark Fasheh | b0697053 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 454 | "Inode %llu, inode i_size = %lld != di " |
| 455 | "i_size = %llu, i_flags = 0x%x\n", |
| 456 | (unsigned long long)OCFS2_I(inode)->ip_blkno, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 457 | i_size_read(inode), |
Mark Fasheh | b0697053 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 458 | (unsigned long long)le64_to_cpu(fe->i_size), |
| 459 | le32_to_cpu(fe->i_flags)); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 460 | |
| 461 | if (new_i_size > le64_to_cpu(fe->i_size)) { |
Mark Fasheh | b0697053 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 462 | mlog(0, "asked to truncate file with size (%llu) to size (%llu)!\n", |
| 463 | (unsigned long long)le64_to_cpu(fe->i_size), |
| 464 | (unsigned long long)new_i_size); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 465 | status = -EINVAL; |
| 466 | mlog_errno(status); |
| 467 | goto bail; |
| 468 | } |
| 469 | |
Mark Fasheh | b0697053 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 470 | mlog(0, "inode %llu, i_size = %llu, new_i_size = %llu\n", |
| 471 | (unsigned long long)le64_to_cpu(fe->i_blkno), |
| 472 | (unsigned long long)le64_to_cpu(fe->i_size), |
| 473 | (unsigned long long)new_i_size); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 474 | |
| 475 | /* lets handle the simple truncate cases before doing any more |
| 476 | * cluster locking. */ |
| 477 | if (new_i_size == le64_to_cpu(fe->i_size)) |
| 478 | goto bail; |
| 479 | |
Mark Fasheh | 2e89b2e | 2007-05-09 13:40:18 -0700 | [diff] [blame] | 480 | down_write(&OCFS2_I(inode)->ip_alloc_sem); |
| 481 | |
Mark Fasheh | 4fe370a | 2009-12-07 13:15:40 -0800 | [diff] [blame] | 482 | ocfs2_resv_discard(&osb->osb_la_resmap, |
| 483 | &OCFS2_I(inode)->ip_la_data_resv); |
| 484 | |
Mark Fasheh | c934a92 | 2007-10-18 15:23:46 -0700 | [diff] [blame] | 485 | /* |
| 486 | * The inode lock forced other nodes to sync and drop their |
| 487 | * pages, which (correctly) happens even if we have a truncate |
| 488 | * without allocation change - ocfs2 cluster sizes can be much |
| 489 | * greater than page size, so we have to truncate them |
| 490 | * anyway. |
| 491 | */ |
Mark Fasheh | 2e89b2e | 2007-05-09 13:40:18 -0700 | [diff] [blame] | 492 | unmap_mapping_range(inode->i_mapping, new_i_size + PAGE_SIZE - 1, 0, 1); |
| 493 | truncate_inode_pages(inode->i_mapping, new_i_size); |
| 494 | |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 495 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { |
| 496 | status = ocfs2_truncate_inline(inode, di_bh, new_i_size, |
Mark Fasheh | b1967d0 | 2007-11-20 11:56:39 -0800 | [diff] [blame] | 497 | i_size_read(inode), 1); |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 498 | if (status) |
| 499 | mlog_errno(status); |
| 500 | |
Mark Fasheh | c934a92 | 2007-10-18 15:23:46 -0700 | [diff] [blame] | 501 | goto bail_unlock_sem; |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 502 | } |
| 503 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 504 | /* alright, we're going to need to do a full blown alloc size |
| 505 | * change. Orphan the inode so that recovery can complete the |
| 506 | * truncate if necessary. This does the task of marking |
| 507 | * i_size. */ |
| 508 | status = ocfs2_orphan_for_truncate(osb, inode, di_bh, new_i_size); |
| 509 | if (status < 0) { |
| 510 | mlog_errno(status); |
Mark Fasheh | c934a92 | 2007-10-18 15:23:46 -0700 | [diff] [blame] | 511 | goto bail_unlock_sem; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 512 | } |
| 513 | |
Tristan Ye | 78f9467 | 2010-05-11 17:54:42 +0800 | [diff] [blame] | 514 | status = ocfs2_commit_truncate(osb, inode, di_bh); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 515 | if (status < 0) { |
| 516 | mlog_errno(status); |
Mark Fasheh | c934a92 | 2007-10-18 15:23:46 -0700 | [diff] [blame] | 517 | goto bail_unlock_sem; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 518 | } |
| 519 | |
| 520 | /* TODO: orphan dir cleanup here. */ |
Mark Fasheh | c934a92 | 2007-10-18 15:23:46 -0700 | [diff] [blame] | 521 | bail_unlock_sem: |
Mark Fasheh | 2e89b2e | 2007-05-09 13:40:18 -0700 | [diff] [blame] | 522 | up_write(&OCFS2_I(inode)->ip_alloc_sem); |
| 523 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 524 | bail: |
Tao Ma | 8b2c0db | 2009-08-18 11:43:49 +0800 | [diff] [blame] | 525 | if (!status && OCFS2_I(inode)->ip_clusters == 0) |
| 526 | status = ocfs2_try_remove_refcount_tree(inode, di_bh); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 527 | |
| 528 | mlog_exit(status); |
| 529 | return status; |
| 530 | } |
| 531 | |
| 532 | /* |
Tao Ma | 0eb8d47e | 2008-08-18 17:38:45 +0800 | [diff] [blame] | 533 | * extend file allocation only here. |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 534 | * we'll update all the disk stuff, and oip->alloc_size |
| 535 | * |
| 536 | * expect stuff to be locked, a transaction started and enough data / |
| 537 | * metadata reservations in the contexts. |
| 538 | * |
| 539 | * Will return -EAGAIN, and a reason if a restart is needed. |
| 540 | * If passed in, *reason will always be set, even in error. |
| 541 | */ |
Tao Ma | 0eb8d47e | 2008-08-18 17:38:45 +0800 | [diff] [blame] | 542 | int ocfs2_add_inode_data(struct ocfs2_super *osb, |
| 543 | struct inode *inode, |
| 544 | u32 *logical_offset, |
| 545 | u32 clusters_to_add, |
| 546 | int mark_unwritten, |
| 547 | struct buffer_head *fe_bh, |
| 548 | handle_t *handle, |
| 549 | struct ocfs2_alloc_context *data_ac, |
| 550 | struct ocfs2_alloc_context *meta_ac, |
| 551 | enum ocfs2_alloc_restarted *reason_ret) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 552 | { |
Joel Becker | f99b9b7 | 2008-08-20 19:36:33 -0700 | [diff] [blame] | 553 | int ret; |
| 554 | struct ocfs2_extent_tree et; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 555 | |
Joel Becker | 5e404e9 | 2009-02-13 03:54:22 -0800 | [diff] [blame] | 556 | ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), fe_bh); |
Joel Becker | cbee7e1 | 2009-02-13 03:34:15 -0800 | [diff] [blame] | 557 | ret = ocfs2_add_clusters_in_btree(handle, &et, logical_offset, |
| 558 | clusters_to_add, mark_unwritten, |
| 559 | data_ac, meta_ac, reason_ret); |
Joel Becker | f99b9b7 | 2008-08-20 19:36:33 -0700 | [diff] [blame] | 560 | |
| 561 | return ret; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 562 | } |
| 563 | |
Mark Fasheh | 2ae99a6 | 2007-03-09 16:43:28 -0800 | [diff] [blame] | 564 | static int __ocfs2_extend_allocation(struct inode *inode, u32 logical_start, |
| 565 | u32 clusters_to_add, int mark_unwritten) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 566 | { |
| 567 | int status = 0; |
| 568 | int restart_func = 0; |
Mark Fasheh | abf8b15 | 2007-01-17 13:07:24 -0800 | [diff] [blame] | 569 | int credits; |
Mark Fasheh | 2ae99a6 | 2007-03-09 16:43:28 -0800 | [diff] [blame] | 570 | u32 prev_clusters; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 571 | struct buffer_head *bh = NULL; |
| 572 | struct ocfs2_dinode *fe = NULL; |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 573 | handle_t *handle = NULL; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 574 | struct ocfs2_alloc_context *data_ac = NULL; |
| 575 | struct ocfs2_alloc_context *meta_ac = NULL; |
| 576 | enum ocfs2_alloc_restarted why; |
| 577 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
Joel Becker | f99b9b7 | 2008-08-20 19:36:33 -0700 | [diff] [blame] | 578 | struct ocfs2_extent_tree et; |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 579 | int did_quota = 0; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 580 | |
| 581 | mlog_entry("(clusters_to_add = %u)\n", clusters_to_add); |
| 582 | |
Mark Fasheh | dcd0538 | 2007-01-16 11:32:23 -0800 | [diff] [blame] | 583 | /* |
| 584 | * This function only exists for file systems which don't |
| 585 | * support holes. |
| 586 | */ |
Mark Fasheh | 2ae99a6 | 2007-03-09 16:43:28 -0800 | [diff] [blame] | 587 | BUG_ON(mark_unwritten && !ocfs2_sparse_alloc(osb)); |
Mark Fasheh | dcd0538 | 2007-01-16 11:32:23 -0800 | [diff] [blame] | 588 | |
Joel Becker | b657c95 | 2008-11-13 14:49:11 -0800 | [diff] [blame] | 589 | status = ocfs2_read_inode_block(inode, &bh); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 590 | if (status < 0) { |
| 591 | mlog_errno(status); |
| 592 | goto leave; |
| 593 | } |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 594 | fe = (struct ocfs2_dinode *) bh->b_data; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 595 | |
| 596 | restart_all: |
| 597 | BUG_ON(le32_to_cpu(fe->i_clusters) != OCFS2_I(inode)->ip_clusters); |
| 598 | |
Tao Ma | e7d4cb6 | 2008-08-18 17:38:44 +0800 | [diff] [blame] | 599 | mlog(0, "extend inode %llu, i_size = %lld, di->i_clusters = %u, " |
| 600 | "clusters_to_add = %u\n", |
| 601 | (unsigned long long)OCFS2_I(inode)->ip_blkno, |
| 602 | (long long)i_size_read(inode), le32_to_cpu(fe->i_clusters), |
| 603 | clusters_to_add); |
Joel Becker | 5e404e9 | 2009-02-13 03:54:22 -0800 | [diff] [blame] | 604 | ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), bh); |
Joel Becker | f99b9b7 | 2008-08-20 19:36:33 -0700 | [diff] [blame] | 605 | status = ocfs2_lock_allocators(inode, &et, clusters_to_add, 0, |
| 606 | &data_ac, &meta_ac); |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 607 | if (status) { |
| 608 | mlog_errno(status); |
| 609 | goto leave; |
| 610 | } |
| 611 | |
Tao Ma | 811f933 | 2008-08-18 17:38:43 +0800 | [diff] [blame] | 612 | credits = ocfs2_calc_extend_credits(osb->sb, &fe->id2.i_list, |
| 613 | clusters_to_add); |
Mark Fasheh | 65eff9c | 2006-10-09 17:26:22 -0700 | [diff] [blame] | 614 | handle = ocfs2_start_trans(osb, credits); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 615 | if (IS_ERR(handle)) { |
| 616 | status = PTR_ERR(handle); |
| 617 | handle = NULL; |
| 618 | mlog_errno(status); |
| 619 | goto leave; |
| 620 | } |
| 621 | |
| 622 | restarted_transaction: |
Christoph Hellwig | 5dd4056 | 2010-03-03 09:05:00 -0500 | [diff] [blame] | 623 | status = dquot_alloc_space_nodirty(inode, |
| 624 | ocfs2_clusters_to_bytes(osb->sb, clusters_to_add)); |
| 625 | if (status) |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 626 | goto leave; |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 627 | did_quota = 1; |
| 628 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 629 | /* reserve a write to the file entry early on - that we if we |
| 630 | * run out of credits in the allocation path, we can still |
| 631 | * update i_size. */ |
Joel Becker | 0cf2f76 | 2009-02-12 16:41:25 -0800 | [diff] [blame] | 632 | status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh, |
Joel Becker | 13723d0 | 2008-10-17 19:25:01 -0700 | [diff] [blame] | 633 | OCFS2_JOURNAL_ACCESS_WRITE); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 634 | if (status < 0) { |
| 635 | mlog_errno(status); |
| 636 | goto leave; |
| 637 | } |
| 638 | |
| 639 | prev_clusters = OCFS2_I(inode)->ip_clusters; |
| 640 | |
Tao Ma | 0eb8d47e | 2008-08-18 17:38:45 +0800 | [diff] [blame] | 641 | status = ocfs2_add_inode_data(osb, |
| 642 | inode, |
| 643 | &logical_start, |
| 644 | clusters_to_add, |
| 645 | mark_unwritten, |
| 646 | bh, |
| 647 | handle, |
| 648 | data_ac, |
| 649 | meta_ac, |
| 650 | &why); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 651 | if ((status < 0) && (status != -EAGAIN)) { |
| 652 | if (status != -ENOSPC) |
| 653 | mlog_errno(status); |
| 654 | goto leave; |
| 655 | } |
| 656 | |
Joel Becker | ec20cec | 2010-03-19 14:13:52 -0700 | [diff] [blame] | 657 | ocfs2_journal_dirty(handle, bh); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 658 | |
| 659 | spin_lock(&OCFS2_I(inode)->ip_lock); |
| 660 | clusters_to_add -= (OCFS2_I(inode)->ip_clusters - prev_clusters); |
| 661 | spin_unlock(&OCFS2_I(inode)->ip_lock); |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 662 | /* Release unused quota reservation */ |
Christoph Hellwig | 5dd4056 | 2010-03-03 09:05:00 -0500 | [diff] [blame] | 663 | dquot_free_space(inode, |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 664 | ocfs2_clusters_to_bytes(osb->sb, clusters_to_add)); |
| 665 | did_quota = 0; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 666 | |
| 667 | if (why != RESTART_NONE && clusters_to_add) { |
| 668 | if (why == RESTART_META) { |
| 669 | mlog(0, "restarting function.\n"); |
| 670 | restart_func = 1; |
Tao Ma | 7968184 | 2010-04-16 13:59:25 +0800 | [diff] [blame] | 671 | status = 0; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 672 | } else { |
| 673 | BUG_ON(why != RESTART_TRANS); |
| 674 | |
| 675 | mlog(0, "restarting transaction.\n"); |
| 676 | /* TODO: This can be more intelligent. */ |
| 677 | credits = ocfs2_calc_extend_credits(osb->sb, |
Tao Ma | 811f933 | 2008-08-18 17:38:43 +0800 | [diff] [blame] | 678 | &fe->id2.i_list, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 679 | clusters_to_add); |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 680 | status = ocfs2_extend_trans(handle, credits); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 681 | if (status < 0) { |
| 682 | /* handle still has to be committed at |
| 683 | * this point. */ |
| 684 | status = -ENOMEM; |
| 685 | mlog_errno(status); |
| 686 | goto leave; |
| 687 | } |
| 688 | goto restarted_transaction; |
| 689 | } |
| 690 | } |
| 691 | |
Mark Fasheh | b0697053 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 692 | mlog(0, "fe: i_clusters = %u, i_size=%llu\n", |
Mark Fasheh | 1ca1a11 | 2007-04-27 16:01:25 -0700 | [diff] [blame] | 693 | le32_to_cpu(fe->i_clusters), |
| 694 | (unsigned long long)le64_to_cpu(fe->i_size)); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 695 | mlog(0, "inode: ip_clusters=%u, i_size=%lld\n", |
Jan Kara | 634bf74 | 2007-12-19 15:25:42 +0100 | [diff] [blame] | 696 | OCFS2_I(inode)->ip_clusters, (long long)i_size_read(inode)); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 697 | |
| 698 | leave: |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 699 | if (status < 0 && did_quota) |
Christoph Hellwig | 5dd4056 | 2010-03-03 09:05:00 -0500 | [diff] [blame] | 700 | dquot_free_space(inode, |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 701 | ocfs2_clusters_to_bytes(osb->sb, clusters_to_add)); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 702 | if (handle) { |
Mark Fasheh | 02dc1af | 2006-10-09 16:48:10 -0700 | [diff] [blame] | 703 | ocfs2_commit_trans(osb, handle); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 704 | handle = NULL; |
| 705 | } |
| 706 | if (data_ac) { |
| 707 | ocfs2_free_alloc_context(data_ac); |
| 708 | data_ac = NULL; |
| 709 | } |
| 710 | if (meta_ac) { |
| 711 | ocfs2_free_alloc_context(meta_ac); |
| 712 | meta_ac = NULL; |
| 713 | } |
| 714 | if ((!status) && restart_func) { |
| 715 | restart_func = 0; |
| 716 | goto restart_all; |
| 717 | } |
Mark Fasheh | a81cb88 | 2008-10-07 14:25:16 -0700 | [diff] [blame] | 718 | brelse(bh); |
| 719 | bh = NULL; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 720 | |
| 721 | mlog_exit(status); |
| 722 | return status; |
| 723 | } |
| 724 | |
Joel Becker | a4bfb4c | 2010-07-06 14:36:06 -0700 | [diff] [blame] | 725 | /* |
| 726 | * While a write will already be ordering the data, a truncate will not. |
| 727 | * Thus, we need to explicitly order the zeroed pages. |
| 728 | */ |
| 729 | static handle_t *ocfs2_zero_start_ordered_transaction(struct inode *inode) |
| 730 | { |
| 731 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 732 | handle_t *handle = NULL; |
| 733 | int ret = 0; |
| 734 | |
| 735 | if (!ocfs2_should_order_data(inode)) |
| 736 | goto out; |
| 737 | |
| 738 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
| 739 | if (IS_ERR(handle)) { |
| 740 | ret = -ENOMEM; |
| 741 | mlog_errno(ret); |
| 742 | goto out; |
| 743 | } |
| 744 | |
| 745 | ret = ocfs2_jbd2_file_inode(handle, inode); |
| 746 | if (ret < 0) |
| 747 | mlog_errno(ret); |
| 748 | |
| 749 | out: |
| 750 | if (ret) { |
| 751 | if (!IS_ERR(handle)) |
| 752 | ocfs2_commit_trans(osb, handle); |
| 753 | handle = ERR_PTR(ret); |
| 754 | } |
| 755 | return handle; |
| 756 | } |
| 757 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 758 | /* Some parts of this taken from generic_cont_expand, which turned out |
| 759 | * to be too fragile to do exactly what we need without us having to |
Nick Piggin | 4e02ed4 | 2008-10-29 14:00:55 -0700 | [diff] [blame] | 760 | * worry about recursive locking in ->write_begin() and ->write_end(). */ |
Joel Becker | a4bfb4c | 2010-07-06 14:36:06 -0700 | [diff] [blame] | 761 | static int ocfs2_write_zero_page(struct inode *inode, u64 abs_from, |
| 762 | u64 abs_to) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 763 | { |
| 764 | struct address_space *mapping = inode->i_mapping; |
| 765 | struct page *page; |
Joel Becker | a4bfb4c | 2010-07-06 14:36:06 -0700 | [diff] [blame] | 766 | unsigned long index = abs_from >> PAGE_CACHE_SHIFT; |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 767 | handle_t *handle = NULL; |
Joel Becker | 5453258 | 2010-07-16 13:32:33 -0700 | [diff] [blame] | 768 | int ret = 0; |
Joel Becker | a4bfb4c | 2010-07-06 14:36:06 -0700 | [diff] [blame] | 769 | unsigned zero_from, zero_to, block_start, block_end; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 770 | |
Joel Becker | a4bfb4c | 2010-07-06 14:36:06 -0700 | [diff] [blame] | 771 | BUG_ON(abs_from >= abs_to); |
| 772 | BUG_ON(abs_to > (((u64)index + 1) << PAGE_CACHE_SHIFT)); |
| 773 | BUG_ON(abs_from & (inode->i_blkbits - 1)); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 774 | |
Jan Kara | 9b4c0ff | 2010-08-24 14:28:03 +0200 | [diff] [blame] | 775 | page = find_or_create_page(mapping, index, GFP_NOFS); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 776 | if (!page) { |
| 777 | ret = -ENOMEM; |
| 778 | mlog_errno(ret); |
| 779 | goto out; |
| 780 | } |
| 781 | |
Joel Becker | a4bfb4c | 2010-07-06 14:36:06 -0700 | [diff] [blame] | 782 | /* Get the offsets within the page that we want to zero */ |
| 783 | zero_from = abs_from & (PAGE_CACHE_SIZE - 1); |
| 784 | zero_to = abs_to & (PAGE_CACHE_SIZE - 1); |
| 785 | if (!zero_to) |
| 786 | zero_to = PAGE_CACHE_SIZE; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 787 | |
Joel Becker | 5693486 | 2010-07-01 15:13:31 -0700 | [diff] [blame] | 788 | mlog(0, |
| 789 | "abs_from = %llu, abs_to = %llu, index = %lu, zero_from = %u, zero_to = %u\n", |
| 790 | (unsigned long long)abs_from, (unsigned long long)abs_to, |
| 791 | index, zero_from, zero_to); |
| 792 | |
Joel Becker | a4bfb4c | 2010-07-06 14:36:06 -0700 | [diff] [blame] | 793 | /* We know that zero_from is block aligned */ |
| 794 | for (block_start = zero_from; block_start < zero_to; |
| 795 | block_start = block_end) { |
| 796 | block_end = block_start + (1 << inode->i_blkbits); |
| 797 | |
| 798 | /* |
Christoph Hellwig | ebdec24 | 2010-10-06 10:47:23 +0200 | [diff] [blame] | 799 | * block_start is block-aligned. Bump it by one to force |
| 800 | * __block_write_begin and block_commit_write to zero the |
Joel Becker | a4bfb4c | 2010-07-06 14:36:06 -0700 | [diff] [blame] | 801 | * whole block. |
| 802 | */ |
Christoph Hellwig | ebdec24 | 2010-10-06 10:47:23 +0200 | [diff] [blame] | 803 | ret = __block_write_begin(page, block_start + 1, 0, |
| 804 | ocfs2_get_block); |
Joel Becker | a4bfb4c | 2010-07-06 14:36:06 -0700 | [diff] [blame] | 805 | if (ret < 0) { |
| 806 | mlog_errno(ret); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 807 | goto out_unlock; |
| 808 | } |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 809 | |
Joel Becker | a4bfb4c | 2010-07-06 14:36:06 -0700 | [diff] [blame] | 810 | if (!handle) { |
| 811 | handle = ocfs2_zero_start_ordered_transaction(inode); |
| 812 | if (IS_ERR(handle)) { |
| 813 | ret = PTR_ERR(handle); |
| 814 | handle = NULL; |
| 815 | break; |
| 816 | } |
| 817 | } |
| 818 | |
| 819 | /* must not update i_size! */ |
| 820 | ret = block_commit_write(page, block_start + 1, |
| 821 | block_start + 1); |
| 822 | if (ret < 0) |
| 823 | mlog_errno(ret); |
| 824 | else |
| 825 | ret = 0; |
| 826 | } |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 827 | |
| 828 | if (handle) |
Mark Fasheh | 02dc1af | 2006-10-09 16:48:10 -0700 | [diff] [blame] | 829 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); |
Joel Becker | a4bfb4c | 2010-07-06 14:36:06 -0700 | [diff] [blame] | 830 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 831 | out_unlock: |
| 832 | unlock_page(page); |
| 833 | page_cache_release(page); |
| 834 | out: |
| 835 | return ret; |
| 836 | } |
| 837 | |
Joel Becker | 5693486 | 2010-07-01 15:13:31 -0700 | [diff] [blame] | 838 | /* |
| 839 | * Find the next range to zero. We do this in terms of bytes because |
| 840 | * that's what ocfs2_zero_extend() wants, and it is dealing with the |
| 841 | * pagecache. We may return multiple extents. |
| 842 | * |
| 843 | * zero_start and zero_end are ocfs2_zero_extend()s current idea of what |
| 844 | * needs to be zeroed. range_start and range_end return the next zeroing |
| 845 | * range. A subsequent call should pass the previous range_end as its |
| 846 | * zero_start. If range_end is 0, there's nothing to do. |
| 847 | * |
| 848 | * Unwritten extents are skipped over. Refcounted extents are CoWd. |
| 849 | */ |
| 850 | static int ocfs2_zero_extend_get_range(struct inode *inode, |
| 851 | struct buffer_head *di_bh, |
| 852 | u64 zero_start, u64 zero_end, |
| 853 | u64 *range_start, u64 *range_end) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 854 | { |
Joel Becker | 5693486 | 2010-07-01 15:13:31 -0700 | [diff] [blame] | 855 | int rc = 0, needs_cow = 0; |
| 856 | u32 p_cpos, zero_clusters = 0; |
| 857 | u32 zero_cpos = |
| 858 | zero_start >> OCFS2_SB(inode->i_sb)->s_clustersize_bits; |
| 859 | u32 last_cpos = ocfs2_clusters_for_bytes(inode->i_sb, zero_end); |
| 860 | unsigned int num_clusters = 0; |
| 861 | unsigned int ext_flags = 0; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 862 | |
Joel Becker | 5693486 | 2010-07-01 15:13:31 -0700 | [diff] [blame] | 863 | while (zero_cpos < last_cpos) { |
| 864 | rc = ocfs2_get_clusters(inode, zero_cpos, &p_cpos, |
| 865 | &num_clusters, &ext_flags); |
| 866 | if (rc) { |
| 867 | mlog_errno(rc); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 868 | goto out; |
| 869 | } |
| 870 | |
Joel Becker | 5693486 | 2010-07-01 15:13:31 -0700 | [diff] [blame] | 871 | if (p_cpos && !(ext_flags & OCFS2_EXT_UNWRITTEN)) { |
| 872 | zero_clusters = num_clusters; |
| 873 | if (ext_flags & OCFS2_EXT_REFCOUNTED) |
| 874 | needs_cow = 1; |
| 875 | break; |
| 876 | } |
| 877 | |
| 878 | zero_cpos += num_clusters; |
| 879 | } |
| 880 | if (!zero_clusters) { |
| 881 | *range_end = 0; |
| 882 | goto out; |
| 883 | } |
| 884 | |
| 885 | while ((zero_cpos + zero_clusters) < last_cpos) { |
| 886 | rc = ocfs2_get_clusters(inode, zero_cpos + zero_clusters, |
| 887 | &p_cpos, &num_clusters, |
| 888 | &ext_flags); |
| 889 | if (rc) { |
| 890 | mlog_errno(rc); |
| 891 | goto out; |
| 892 | } |
| 893 | |
| 894 | if (!p_cpos || (ext_flags & OCFS2_EXT_UNWRITTEN)) |
| 895 | break; |
| 896 | if (ext_flags & OCFS2_EXT_REFCOUNTED) |
| 897 | needs_cow = 1; |
| 898 | zero_clusters += num_clusters; |
| 899 | } |
| 900 | if ((zero_cpos + zero_clusters) > last_cpos) |
| 901 | zero_clusters = last_cpos - zero_cpos; |
| 902 | |
| 903 | if (needs_cow) { |
Tao Ma | 1550271 | 2010-08-12 10:36:38 +0800 | [diff] [blame] | 904 | rc = ocfs2_refcount_cow(inode, NULL, di_bh, zero_cpos, |
| 905 | zero_clusters, UINT_MAX); |
Joel Becker | 5693486 | 2010-07-01 15:13:31 -0700 | [diff] [blame] | 906 | if (rc) { |
| 907 | mlog_errno(rc); |
| 908 | goto out; |
| 909 | } |
| 910 | } |
| 911 | |
| 912 | *range_start = ocfs2_clusters_to_bytes(inode->i_sb, zero_cpos); |
| 913 | *range_end = ocfs2_clusters_to_bytes(inode->i_sb, |
| 914 | zero_cpos + zero_clusters); |
| 915 | |
| 916 | out: |
| 917 | return rc; |
| 918 | } |
| 919 | |
| 920 | /* |
| 921 | * Zero one range returned from ocfs2_zero_extend_get_range(). The caller |
| 922 | * has made sure that the entire range needs zeroing. |
| 923 | */ |
| 924 | static int ocfs2_zero_extend_range(struct inode *inode, u64 range_start, |
| 925 | u64 range_end) |
| 926 | { |
| 927 | int rc = 0; |
| 928 | u64 next_pos; |
| 929 | u64 zero_pos = range_start; |
| 930 | |
| 931 | mlog(0, "range_start = %llu, range_end = %llu\n", |
| 932 | (unsigned long long)range_start, |
| 933 | (unsigned long long)range_end); |
| 934 | BUG_ON(range_start >= range_end); |
| 935 | |
| 936 | while (zero_pos < range_end) { |
| 937 | next_pos = (zero_pos & PAGE_CACHE_MASK) + PAGE_CACHE_SIZE; |
| 938 | if (next_pos > range_end) |
| 939 | next_pos = range_end; |
| 940 | rc = ocfs2_write_zero_page(inode, zero_pos, next_pos); |
| 941 | if (rc < 0) { |
| 942 | mlog_errno(rc); |
| 943 | break; |
| 944 | } |
| 945 | zero_pos = next_pos; |
Mark Fasheh | e2057c5 | 2006-10-03 17:53:05 -0700 | [diff] [blame] | 946 | |
| 947 | /* |
| 948 | * Very large extends have the potential to lock up |
| 949 | * the cpu for extended periods of time. |
| 950 | */ |
| 951 | cond_resched(); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 952 | } |
| 953 | |
Joel Becker | 5693486 | 2010-07-01 15:13:31 -0700 | [diff] [blame] | 954 | return rc; |
| 955 | } |
| 956 | |
| 957 | int ocfs2_zero_extend(struct inode *inode, struct buffer_head *di_bh, |
| 958 | loff_t zero_to_size) |
| 959 | { |
| 960 | int ret = 0; |
| 961 | u64 zero_start, range_start = 0, range_end = 0; |
| 962 | struct super_block *sb = inode->i_sb; |
| 963 | |
| 964 | zero_start = ocfs2_align_bytes_to_blocks(sb, i_size_read(inode)); |
| 965 | mlog(0, "zero_start %llu for i_size %llu\n", |
| 966 | (unsigned long long)zero_start, |
| 967 | (unsigned long long)i_size_read(inode)); |
| 968 | while (zero_start < zero_to_size) { |
| 969 | ret = ocfs2_zero_extend_get_range(inode, di_bh, zero_start, |
| 970 | zero_to_size, |
| 971 | &range_start, |
| 972 | &range_end); |
| 973 | if (ret) { |
| 974 | mlog_errno(ret); |
| 975 | break; |
| 976 | } |
| 977 | if (!range_end) |
| 978 | break; |
| 979 | /* Trim the ends */ |
| 980 | if (range_start < zero_start) |
| 981 | range_start = zero_start; |
| 982 | if (range_end > zero_to_size) |
| 983 | range_end = zero_to_size; |
| 984 | |
| 985 | ret = ocfs2_zero_extend_range(inode, range_start, |
| 986 | range_end); |
| 987 | if (ret) { |
| 988 | mlog_errno(ret); |
| 989 | break; |
| 990 | } |
| 991 | zero_start = range_end; |
| 992 | } |
| 993 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 994 | return ret; |
| 995 | } |
| 996 | |
Joel Becker | 5693486 | 2010-07-01 15:13:31 -0700 | [diff] [blame] | 997 | int ocfs2_extend_no_holes(struct inode *inode, struct buffer_head *di_bh, |
| 998 | u64 new_i_size, u64 zero_to) |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 999 | { |
| 1000 | int ret; |
| 1001 | u32 clusters_to_add; |
| 1002 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
| 1003 | |
Joel Becker | 5693486 | 2010-07-01 15:13:31 -0700 | [diff] [blame] | 1004 | /* |
| 1005 | * Only quota files call this without a bh, and they can't be |
| 1006 | * refcounted. |
| 1007 | */ |
| 1008 | BUG_ON(!di_bh && (oi->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL)); |
| 1009 | BUG_ON(!di_bh && !(oi->ip_flags & OCFS2_INODE_SYSTEM_FILE)); |
| 1010 | |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 1011 | clusters_to_add = ocfs2_clusters_for_bytes(inode->i_sb, new_i_size); |
| 1012 | if (clusters_to_add < oi->ip_clusters) |
| 1013 | clusters_to_add = 0; |
| 1014 | else |
| 1015 | clusters_to_add -= oi->ip_clusters; |
| 1016 | |
| 1017 | if (clusters_to_add) { |
| 1018 | ret = __ocfs2_extend_allocation(inode, oi->ip_clusters, |
| 1019 | clusters_to_add, 0); |
| 1020 | if (ret) { |
| 1021 | mlog_errno(ret); |
| 1022 | goto out; |
| 1023 | } |
| 1024 | } |
| 1025 | |
| 1026 | /* |
| 1027 | * Call this even if we don't add any clusters to the tree. We |
| 1028 | * still need to zero the area between the old i_size and the |
| 1029 | * new i_size. |
| 1030 | */ |
Joel Becker | 5693486 | 2010-07-01 15:13:31 -0700 | [diff] [blame] | 1031 | ret = ocfs2_zero_extend(inode, di_bh, zero_to); |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 1032 | if (ret < 0) |
| 1033 | mlog_errno(ret); |
| 1034 | |
| 1035 | out: |
| 1036 | return ret; |
| 1037 | } |
| 1038 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1039 | static int ocfs2_extend_file(struct inode *inode, |
| 1040 | struct buffer_head *di_bh, |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 1041 | u64 new_i_size) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1042 | { |
Mark Fasheh | c934a92 | 2007-10-18 15:23:46 -0700 | [diff] [blame] | 1043 | int ret = 0; |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 1044 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1045 | |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 1046 | BUG_ON(!di_bh); |
Mark Fasheh | 53013cb | 2006-05-05 19:04:03 -0700 | [diff] [blame] | 1047 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1048 | /* setattr sometimes calls us like this. */ |
| 1049 | if (new_i_size == 0) |
| 1050 | goto out; |
| 1051 | |
| 1052 | if (i_size_read(inode) == new_i_size) |
Joel Becker | 5693486 | 2010-07-01 15:13:31 -0700 | [diff] [blame] | 1053 | goto out; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1054 | BUG_ON(new_i_size < i_size_read(inode)); |
| 1055 | |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 1056 | /* |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 1057 | * The alloc sem blocks people in read/write from reading our |
| 1058 | * allocation until we're done changing it. We depend on |
| 1059 | * i_mutex to block other extend/truncate calls while we're |
Joel Becker | 5693486 | 2010-07-01 15:13:31 -0700 | [diff] [blame] | 1060 | * here. We even have to hold it for sparse files because there |
| 1061 | * might be some tail zeroing. |
Mark Fasheh | 0effef7 | 2006-10-03 17:44:42 -0700 | [diff] [blame] | 1062 | */ |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 1063 | down_write(&oi->ip_alloc_sem); |
| 1064 | |
| 1065 | if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { |
| 1066 | /* |
| 1067 | * We can optimize small extends by keeping the inodes |
| 1068 | * inline data. |
| 1069 | */ |
| 1070 | if (ocfs2_size_fits_inline_data(di_bh, new_i_size)) { |
| 1071 | up_write(&oi->ip_alloc_sem); |
| 1072 | goto out_update_size; |
| 1073 | } |
| 1074 | |
| 1075 | ret = ocfs2_convert_inline_data_to_extents(inode, di_bh); |
| 1076 | if (ret) { |
| 1077 | up_write(&oi->ip_alloc_sem); |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 1078 | mlog_errno(ret); |
Mark Fasheh | c934a92 | 2007-10-18 15:23:46 -0700 | [diff] [blame] | 1079 | goto out; |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 1080 | } |
| 1081 | } |
| 1082 | |
Joel Becker | 5693486 | 2010-07-01 15:13:31 -0700 | [diff] [blame] | 1083 | if (ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb))) |
| 1084 | ret = ocfs2_zero_extend(inode, di_bh, new_i_size); |
| 1085 | else |
| 1086 | ret = ocfs2_extend_no_holes(inode, di_bh, new_i_size, |
| 1087 | new_i_size); |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 1088 | |
| 1089 | up_write(&oi->ip_alloc_sem); |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 1090 | |
Mark Fasheh | 0effef7 | 2006-10-03 17:44:42 -0700 | [diff] [blame] | 1091 | if (ret < 0) { |
| 1092 | mlog_errno(ret); |
Mark Fasheh | c934a92 | 2007-10-18 15:23:46 -0700 | [diff] [blame] | 1093 | goto out; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1094 | } |
| 1095 | |
Mark Fasheh | 3a0782d | 2007-01-17 12:53:31 -0800 | [diff] [blame] | 1096 | out_update_size: |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 1097 | ret = ocfs2_simple_size_update(inode, di_bh, new_i_size); |
| 1098 | if (ret < 0) |
| 1099 | mlog_errno(ret); |
Mark Fasheh | 53013cb | 2006-05-05 19:04:03 -0700 | [diff] [blame] | 1100 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1101 | out: |
| 1102 | return ret; |
| 1103 | } |
| 1104 | |
| 1105 | int ocfs2_setattr(struct dentry *dentry, struct iattr *attr) |
| 1106 | { |
| 1107 | int status = 0, size_change; |
| 1108 | struct inode *inode = dentry->d_inode; |
| 1109 | struct super_block *sb = inode->i_sb; |
| 1110 | struct ocfs2_super *osb = OCFS2_SB(sb); |
| 1111 | struct buffer_head *bh = NULL; |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 1112 | handle_t *handle = NULL; |
Jan Kara | 65bac57 | 2009-06-02 14:24:01 +0200 | [diff] [blame] | 1113 | struct dquot *transfer_to[MAXQUOTAS] = { }; |
Jan Kara | 52a9ee2 | 2010-05-13 20:18:45 +0200 | [diff] [blame] | 1114 | int qtype; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1115 | |
| 1116 | mlog_entry("(0x%p, '%.*s')\n", dentry, |
| 1117 | dentry->d_name.len, dentry->d_name.name); |
| 1118 | |
Sunil Mushran | bc53580 | 2008-04-18 10:23:53 -0700 | [diff] [blame] | 1119 | /* ensuring we don't even attempt to truncate a symlink */ |
| 1120 | if (S_ISLNK(inode->i_mode)) |
| 1121 | attr->ia_valid &= ~ATTR_SIZE; |
| 1122 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1123 | if (attr->ia_valid & ATTR_MODE) |
| 1124 | mlog(0, "mode change: %d\n", attr->ia_mode); |
| 1125 | if (attr->ia_valid & ATTR_UID) |
| 1126 | mlog(0, "uid change: %d\n", attr->ia_uid); |
| 1127 | if (attr->ia_valid & ATTR_GID) |
| 1128 | mlog(0, "gid change: %d\n", attr->ia_gid); |
| 1129 | if (attr->ia_valid & ATTR_SIZE) |
| 1130 | mlog(0, "size change...\n"); |
| 1131 | if (attr->ia_valid & (ATTR_ATIME | ATTR_MTIME | ATTR_CTIME)) |
| 1132 | mlog(0, "time change...\n"); |
| 1133 | |
| 1134 | #define OCFS2_VALID_ATTRS (ATTR_ATIME | ATTR_MTIME | ATTR_CTIME | ATTR_SIZE \ |
| 1135 | | ATTR_GID | ATTR_UID | ATTR_MODE) |
| 1136 | if (!(attr->ia_valid & OCFS2_VALID_ATTRS)) { |
| 1137 | mlog(0, "can't handle attrs: 0x%x\n", attr->ia_valid); |
| 1138 | return 0; |
| 1139 | } |
| 1140 | |
| 1141 | status = inode_change_ok(inode, attr); |
| 1142 | if (status) |
| 1143 | return status; |
| 1144 | |
Dmitry Monakhov | 1275562 | 2010-04-08 22:04:20 +0400 | [diff] [blame] | 1145 | if (is_quota_modification(inode, attr)) |
| 1146 | dquot_initialize(inode); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1147 | size_change = S_ISREG(inode->i_mode) && attr->ia_valid & ATTR_SIZE; |
| 1148 | if (size_change) { |
| 1149 | status = ocfs2_rw_lock(inode, 1); |
| 1150 | if (status < 0) { |
| 1151 | mlog_errno(status); |
| 1152 | goto bail; |
| 1153 | } |
| 1154 | } |
| 1155 | |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1156 | status = ocfs2_inode_lock(inode, &bh, 1); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1157 | if (status < 0) { |
| 1158 | if (status != -ENOENT) |
| 1159 | mlog_errno(status); |
| 1160 | goto bail_unlock_rw; |
| 1161 | } |
| 1162 | |
| 1163 | if (size_change && attr->ia_size != i_size_read(inode)) { |
Wengang Wang | 5051f76 | 2010-02-26 18:18:25 +0800 | [diff] [blame] | 1164 | status = inode_newsize_ok(inode, attr->ia_size); |
| 1165 | if (status) |
Mark Fasheh | ce76fd3 | 2007-07-20 12:02:14 -0700 | [diff] [blame] | 1166 | goto bail_unlock; |
Mark Fasheh | ce76fd3 | 2007-07-20 12:02:14 -0700 | [diff] [blame] | 1167 | |
Joel Becker | 2b4e30f | 2008-09-03 20:03:41 -0700 | [diff] [blame] | 1168 | if (i_size_read(inode) > attr->ia_size) { |
| 1169 | if (ocfs2_should_order_data(inode)) { |
| 1170 | status = ocfs2_begin_ordered_truncate(inode, |
| 1171 | attr->ia_size); |
| 1172 | if (status) |
| 1173 | goto bail_unlock; |
| 1174 | } |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1175 | status = ocfs2_truncate_file(inode, bh, attr->ia_size); |
Joel Becker | 2b4e30f | 2008-09-03 20:03:41 -0700 | [diff] [blame] | 1176 | } else |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 1177 | status = ocfs2_extend_file(inode, bh, attr->ia_size); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1178 | if (status < 0) { |
| 1179 | if (status != -ENOSPC) |
| 1180 | mlog_errno(status); |
| 1181 | status = -ENOSPC; |
| 1182 | goto bail_unlock; |
| 1183 | } |
| 1184 | } |
| 1185 | |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 1186 | if ((attr->ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid) || |
| 1187 | (attr->ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid)) { |
Jan Kara | 65bac57 | 2009-06-02 14:24:01 +0200 | [diff] [blame] | 1188 | /* |
| 1189 | * Gather pointers to quota structures so that allocation / |
| 1190 | * freeing of quota structures happens here and not inside |
Christoph Hellwig | b43fa82 | 2010-03-03 09:05:03 -0500 | [diff] [blame] | 1191 | * dquot_transfer() where we have problems with lock ordering |
Jan Kara | 65bac57 | 2009-06-02 14:24:01 +0200 | [diff] [blame] | 1192 | */ |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 1193 | if (attr->ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid |
| 1194 | && OCFS2_HAS_RO_COMPAT_FEATURE(sb, |
| 1195 | OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) { |
Jan Kara | 65bac57 | 2009-06-02 14:24:01 +0200 | [diff] [blame] | 1196 | transfer_to[USRQUOTA] = dqget(sb, attr->ia_uid, |
| 1197 | USRQUOTA); |
Jan Kara | 52a9ee2 | 2010-05-13 20:18:45 +0200 | [diff] [blame] | 1198 | if (!transfer_to[USRQUOTA]) { |
Jan Kara | 65bac57 | 2009-06-02 14:24:01 +0200 | [diff] [blame] | 1199 | status = -ESRCH; |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 1200 | goto bail_unlock; |
Jan Kara | 65bac57 | 2009-06-02 14:24:01 +0200 | [diff] [blame] | 1201 | } |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 1202 | } |
| 1203 | if (attr->ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid |
| 1204 | && OCFS2_HAS_RO_COMPAT_FEATURE(sb, |
| 1205 | OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) { |
Jan Kara | 65bac57 | 2009-06-02 14:24:01 +0200 | [diff] [blame] | 1206 | transfer_to[GRPQUOTA] = dqget(sb, attr->ia_gid, |
| 1207 | GRPQUOTA); |
Jan Kara | 52a9ee2 | 2010-05-13 20:18:45 +0200 | [diff] [blame] | 1208 | if (!transfer_to[GRPQUOTA]) { |
Jan Kara | 65bac57 | 2009-06-02 14:24:01 +0200 | [diff] [blame] | 1209 | status = -ESRCH; |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 1210 | goto bail_unlock; |
Jan Kara | 65bac57 | 2009-06-02 14:24:01 +0200 | [diff] [blame] | 1211 | } |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 1212 | } |
Jan Kara | 65bac57 | 2009-06-02 14:24:01 +0200 | [diff] [blame] | 1213 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS + |
| 1214 | 2 * ocfs2_quota_trans_credits(sb)); |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 1215 | if (IS_ERR(handle)) { |
| 1216 | status = PTR_ERR(handle); |
| 1217 | mlog_errno(status); |
| 1218 | goto bail_unlock; |
| 1219 | } |
Jan Kara | 52a9ee2 | 2010-05-13 20:18:45 +0200 | [diff] [blame] | 1220 | status = __dquot_transfer(inode, transfer_to); |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 1221 | if (status < 0) |
| 1222 | goto bail_commit; |
| 1223 | } else { |
| 1224 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
| 1225 | if (IS_ERR(handle)) { |
| 1226 | status = PTR_ERR(handle); |
| 1227 | mlog_errno(status); |
| 1228 | goto bail_unlock; |
| 1229 | } |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1230 | } |
| 1231 | |
Mark Fasheh | 7307de8 | 2007-05-09 15:16:19 -0700 | [diff] [blame] | 1232 | /* |
Christoph Hellwig | 2c27c65 | 2010-06-04 11:30:04 +0200 | [diff] [blame] | 1233 | * This will intentionally not wind up calling truncate_setsize(), |
Mark Fasheh | 7307de8 | 2007-05-09 15:16:19 -0700 | [diff] [blame] | 1234 | * since all the work for a size change has been done above. |
| 1235 | * Otherwise, we could get into problems with truncate as |
| 1236 | * ip_alloc_sem is used there to protect against i_size |
| 1237 | * changes. |
Christoph Hellwig | 1025774 | 2010-06-04 11:30:02 +0200 | [diff] [blame] | 1238 | * |
| 1239 | * XXX: this means the conditional below can probably be removed. |
Mark Fasheh | 7307de8 | 2007-05-09 15:16:19 -0700 | [diff] [blame] | 1240 | */ |
Christoph Hellwig | 1025774 | 2010-06-04 11:30:02 +0200 | [diff] [blame] | 1241 | if ((attr->ia_valid & ATTR_SIZE) && |
| 1242 | attr->ia_size != i_size_read(inode)) { |
| 1243 | status = vmtruncate(inode, attr->ia_size); |
| 1244 | if (status) { |
| 1245 | mlog_errno(status); |
| 1246 | goto bail_commit; |
| 1247 | } |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1248 | } |
| 1249 | |
Christoph Hellwig | 1025774 | 2010-06-04 11:30:02 +0200 | [diff] [blame] | 1250 | setattr_copy(inode, attr); |
| 1251 | mark_inode_dirty(inode); |
| 1252 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1253 | status = ocfs2_mark_inode_dirty(handle, inode, bh); |
| 1254 | if (status < 0) |
| 1255 | mlog_errno(status); |
| 1256 | |
| 1257 | bail_commit: |
Mark Fasheh | 02dc1af | 2006-10-09 16:48:10 -0700 | [diff] [blame] | 1258 | ocfs2_commit_trans(osb, handle); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1259 | bail_unlock: |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1260 | ocfs2_inode_unlock(inode, 1); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1261 | bail_unlock_rw: |
| 1262 | if (size_change) |
| 1263 | ocfs2_rw_unlock(inode, 1); |
| 1264 | bail: |
Mark Fasheh | a81cb88 | 2008-10-07 14:25:16 -0700 | [diff] [blame] | 1265 | brelse(bh); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1266 | |
Jan Kara | 65bac57 | 2009-06-02 14:24:01 +0200 | [diff] [blame] | 1267 | /* Release quota pointers in case we acquired them */ |
Jan Kara | 52a9ee2 | 2010-05-13 20:18:45 +0200 | [diff] [blame] | 1268 | for (qtype = 0; qtype < MAXQUOTAS; qtype++) |
Jan Kara | 65bac57 | 2009-06-02 14:24:01 +0200 | [diff] [blame] | 1269 | dqput(transfer_to[qtype]); |
Jan Kara | 65bac57 | 2009-06-02 14:24:01 +0200 | [diff] [blame] | 1270 | |
Tiger Yang | 060bc66 | 2008-11-14 11:17:29 +0800 | [diff] [blame] | 1271 | if (!status && attr->ia_valid & ATTR_MODE) { |
| 1272 | status = ocfs2_acl_chmod(inode); |
| 1273 | if (status < 0) |
| 1274 | mlog_errno(status); |
| 1275 | } |
| 1276 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1277 | mlog_exit(status); |
| 1278 | return status; |
| 1279 | } |
| 1280 | |
| 1281 | int ocfs2_getattr(struct vfsmount *mnt, |
| 1282 | struct dentry *dentry, |
| 1283 | struct kstat *stat) |
| 1284 | { |
| 1285 | struct inode *inode = dentry->d_inode; |
| 1286 | struct super_block *sb = dentry->d_inode->i_sb; |
| 1287 | struct ocfs2_super *osb = sb->s_fs_info; |
| 1288 | int err; |
| 1289 | |
| 1290 | mlog_entry_void(); |
| 1291 | |
| 1292 | err = ocfs2_inode_revalidate(dentry); |
| 1293 | if (err) { |
| 1294 | if (err != -ENOENT) |
| 1295 | mlog_errno(err); |
| 1296 | goto bail; |
| 1297 | } |
| 1298 | |
| 1299 | generic_fillattr(inode, stat); |
| 1300 | |
| 1301 | /* We set the blksize from the cluster size for performance */ |
| 1302 | stat->blksize = osb->s_clustersize; |
| 1303 | |
| 1304 | bail: |
| 1305 | mlog_exit(err); |
| 1306 | |
| 1307 | return err; |
| 1308 | } |
| 1309 | |
Nick Piggin | b74c79e | 2011-01-07 17:49:58 +1100 | [diff] [blame] | 1310 | int ocfs2_permission(struct inode *inode, int mask, unsigned int flags) |
Tiger Yang | d38eb8d | 2006-11-27 09:59:21 +0800 | [diff] [blame] | 1311 | { |
| 1312 | int ret; |
| 1313 | |
Nick Piggin | b74c79e | 2011-01-07 17:49:58 +1100 | [diff] [blame] | 1314 | if (flags & IPERM_FLAG_RCU) |
| 1315 | return -ECHILD; |
| 1316 | |
Tiger Yang | d38eb8d | 2006-11-27 09:59:21 +0800 | [diff] [blame] | 1317 | mlog_entry_void(); |
| 1318 | |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1319 | ret = ocfs2_inode_lock(inode, NULL, 0); |
Tiger Yang | d38eb8d | 2006-11-27 09:59:21 +0800 | [diff] [blame] | 1320 | if (ret) { |
Mark Fasheh | a9f5f70 | 2007-04-26 11:43:43 -0700 | [diff] [blame] | 1321 | if (ret != -ENOENT) |
| 1322 | mlog_errno(ret); |
Tiger Yang | d38eb8d | 2006-11-27 09:59:21 +0800 | [diff] [blame] | 1323 | goto out; |
| 1324 | } |
| 1325 | |
Nick Piggin | b74c79e | 2011-01-07 17:49:58 +1100 | [diff] [blame] | 1326 | ret = generic_permission(inode, mask, flags, ocfs2_check_acl); |
Tiger Yang | d38eb8d | 2006-11-27 09:59:21 +0800 | [diff] [blame] | 1327 | |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1328 | ocfs2_inode_unlock(inode, 0); |
Tiger Yang | d38eb8d | 2006-11-27 09:59:21 +0800 | [diff] [blame] | 1329 | out: |
| 1330 | mlog_exit(ret); |
| 1331 | return ret; |
| 1332 | } |
| 1333 | |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1334 | static int __ocfs2_write_remove_suid(struct inode *inode, |
| 1335 | struct buffer_head *bh) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1336 | { |
| 1337 | int ret; |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 1338 | handle_t *handle; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1339 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 1340 | struct ocfs2_dinode *di; |
| 1341 | |
Mark Fasheh | b0697053 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 1342 | mlog_entry("(Inode %llu, mode 0%o)\n", |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1343 | (unsigned long long)OCFS2_I(inode)->ip_blkno, inode->i_mode); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1344 | |
Mark Fasheh | 65eff9c | 2006-10-09 17:26:22 -0700 | [diff] [blame] | 1345 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
Jan Kara | fa38e92 | 2008-10-20 19:23:51 +0200 | [diff] [blame] | 1346 | if (IS_ERR(handle)) { |
| 1347 | ret = PTR_ERR(handle); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1348 | mlog_errno(ret); |
| 1349 | goto out; |
| 1350 | } |
| 1351 | |
Joel Becker | 0cf2f76 | 2009-02-12 16:41:25 -0800 | [diff] [blame] | 1352 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh, |
Joel Becker | 13723d0 | 2008-10-17 19:25:01 -0700 | [diff] [blame] | 1353 | OCFS2_JOURNAL_ACCESS_WRITE); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1354 | if (ret < 0) { |
| 1355 | mlog_errno(ret); |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1356 | goto out_trans; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1357 | } |
| 1358 | |
| 1359 | inode->i_mode &= ~S_ISUID; |
| 1360 | if ((inode->i_mode & S_ISGID) && (inode->i_mode & S_IXGRP)) |
| 1361 | inode->i_mode &= ~S_ISGID; |
| 1362 | |
| 1363 | di = (struct ocfs2_dinode *) bh->b_data; |
| 1364 | di->i_mode = cpu_to_le16(inode->i_mode); |
| 1365 | |
Joel Becker | ec20cec | 2010-03-19 14:13:52 -0700 | [diff] [blame] | 1366 | ocfs2_journal_dirty(handle, bh); |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1367 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1368 | out_trans: |
Mark Fasheh | 02dc1af | 2006-10-09 16:48:10 -0700 | [diff] [blame] | 1369 | ocfs2_commit_trans(osb, handle); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1370 | out: |
| 1371 | mlog_exit(ret); |
| 1372 | return ret; |
| 1373 | } |
| 1374 | |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1375 | /* |
| 1376 | * Will look for holes and unwritten extents in the range starting at |
| 1377 | * pos for count bytes (inclusive). |
| 1378 | */ |
| 1379 | static int ocfs2_check_range_for_holes(struct inode *inode, loff_t pos, |
| 1380 | size_t count) |
| 1381 | { |
| 1382 | int ret = 0; |
Mark Fasheh | 49cb8d2 | 2007-03-09 16:21:46 -0800 | [diff] [blame] | 1383 | unsigned int extent_flags; |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1384 | u32 cpos, clusters, extent_len, phys_cpos; |
| 1385 | struct super_block *sb = inode->i_sb; |
| 1386 | |
| 1387 | cpos = pos >> OCFS2_SB(sb)->s_clustersize_bits; |
| 1388 | clusters = ocfs2_clusters_for_bytes(sb, pos + count) - cpos; |
| 1389 | |
| 1390 | while (clusters) { |
Mark Fasheh | 49cb8d2 | 2007-03-09 16:21:46 -0800 | [diff] [blame] | 1391 | ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, &extent_len, |
| 1392 | &extent_flags); |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1393 | if (ret < 0) { |
| 1394 | mlog_errno(ret); |
| 1395 | goto out; |
| 1396 | } |
| 1397 | |
Mark Fasheh | 49cb8d2 | 2007-03-09 16:21:46 -0800 | [diff] [blame] | 1398 | if (phys_cpos == 0 || (extent_flags & OCFS2_EXT_UNWRITTEN)) { |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1399 | ret = 1; |
| 1400 | break; |
| 1401 | } |
| 1402 | |
| 1403 | if (extent_len > clusters) |
| 1404 | extent_len = clusters; |
| 1405 | |
| 1406 | clusters -= extent_len; |
| 1407 | cpos += extent_len; |
| 1408 | } |
| 1409 | out: |
| 1410 | return ret; |
| 1411 | } |
| 1412 | |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1413 | static int ocfs2_write_remove_suid(struct inode *inode) |
| 1414 | { |
| 1415 | int ret; |
| 1416 | struct buffer_head *bh = NULL; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1417 | |
Joel Becker | b657c95 | 2008-11-13 14:49:11 -0800 | [diff] [blame] | 1418 | ret = ocfs2_read_inode_block(inode, &bh); |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1419 | if (ret < 0) { |
| 1420 | mlog_errno(ret); |
| 1421 | goto out; |
| 1422 | } |
| 1423 | |
| 1424 | ret = __ocfs2_write_remove_suid(inode, bh); |
| 1425 | out: |
| 1426 | brelse(bh); |
| 1427 | return ret; |
| 1428 | } |
| 1429 | |
Mark Fasheh | 2ae99a6 | 2007-03-09 16:43:28 -0800 | [diff] [blame] | 1430 | /* |
| 1431 | * Allocate enough extents to cover the region starting at byte offset |
| 1432 | * start for len bytes. Existing extents are skipped, any extents |
| 1433 | * added are marked as "unwritten". |
| 1434 | */ |
| 1435 | static int ocfs2_allocate_unwritten_extents(struct inode *inode, |
| 1436 | u64 start, u64 len) |
| 1437 | { |
| 1438 | int ret; |
| 1439 | u32 cpos, phys_cpos, clusters, alloc_size; |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 1440 | u64 end = start + len; |
| 1441 | struct buffer_head *di_bh = NULL; |
| 1442 | |
| 1443 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { |
Joel Becker | b657c95 | 2008-11-13 14:49:11 -0800 | [diff] [blame] | 1444 | ret = ocfs2_read_inode_block(inode, &di_bh); |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 1445 | if (ret) { |
| 1446 | mlog_errno(ret); |
| 1447 | goto out; |
| 1448 | } |
| 1449 | |
| 1450 | /* |
| 1451 | * Nothing to do if the requested reservation range |
| 1452 | * fits within the inode. |
| 1453 | */ |
| 1454 | if (ocfs2_size_fits_inline_data(di_bh, end)) |
| 1455 | goto out; |
| 1456 | |
| 1457 | ret = ocfs2_convert_inline_data_to_extents(inode, di_bh); |
| 1458 | if (ret) { |
| 1459 | mlog_errno(ret); |
| 1460 | goto out; |
| 1461 | } |
| 1462 | } |
Mark Fasheh | 2ae99a6 | 2007-03-09 16:43:28 -0800 | [diff] [blame] | 1463 | |
| 1464 | /* |
| 1465 | * We consider both start and len to be inclusive. |
| 1466 | */ |
| 1467 | cpos = start >> OCFS2_SB(inode->i_sb)->s_clustersize_bits; |
| 1468 | clusters = ocfs2_clusters_for_bytes(inode->i_sb, start + len); |
| 1469 | clusters -= cpos; |
| 1470 | |
| 1471 | while (clusters) { |
| 1472 | ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, |
| 1473 | &alloc_size, NULL); |
| 1474 | if (ret) { |
| 1475 | mlog_errno(ret); |
| 1476 | goto out; |
| 1477 | } |
| 1478 | |
| 1479 | /* |
| 1480 | * Hole or existing extent len can be arbitrary, so |
| 1481 | * cap it to our own allocation request. |
| 1482 | */ |
| 1483 | if (alloc_size > clusters) |
| 1484 | alloc_size = clusters; |
| 1485 | |
| 1486 | if (phys_cpos) { |
| 1487 | /* |
| 1488 | * We already have an allocation at this |
| 1489 | * region so we can safely skip it. |
| 1490 | */ |
| 1491 | goto next; |
| 1492 | } |
| 1493 | |
| 1494 | ret = __ocfs2_extend_allocation(inode, cpos, alloc_size, 1); |
| 1495 | if (ret) { |
| 1496 | if (ret != -ENOSPC) |
| 1497 | mlog_errno(ret); |
| 1498 | goto out; |
| 1499 | } |
| 1500 | |
| 1501 | next: |
| 1502 | cpos += alloc_size; |
| 1503 | clusters -= alloc_size; |
| 1504 | } |
| 1505 | |
| 1506 | ret = 0; |
| 1507 | out: |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 1508 | |
| 1509 | brelse(di_bh); |
Mark Fasheh | 2ae99a6 | 2007-03-09 16:43:28 -0800 | [diff] [blame] | 1510 | return ret; |
| 1511 | } |
| 1512 | |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1513 | /* |
| 1514 | * Truncate a byte range, avoiding pages within partial clusters. This |
| 1515 | * preserves those pages for the zeroing code to write to. |
| 1516 | */ |
| 1517 | static void ocfs2_truncate_cluster_pages(struct inode *inode, u64 byte_start, |
| 1518 | u64 byte_len) |
| 1519 | { |
| 1520 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 1521 | loff_t start, end; |
| 1522 | struct address_space *mapping = inode->i_mapping; |
| 1523 | |
| 1524 | start = (loff_t)ocfs2_align_bytes_to_clusters(inode->i_sb, byte_start); |
| 1525 | end = byte_start + byte_len; |
| 1526 | end = end & ~(osb->s_clustersize - 1); |
| 1527 | |
| 1528 | if (start < end) { |
| 1529 | unmap_mapping_range(mapping, start, end - start, 0); |
| 1530 | truncate_inode_pages_range(mapping, start, end - 1); |
| 1531 | } |
| 1532 | } |
| 1533 | |
| 1534 | static int ocfs2_zero_partial_clusters(struct inode *inode, |
| 1535 | u64 start, u64 len) |
| 1536 | { |
| 1537 | int ret = 0; |
| 1538 | u64 tmpend, end = start + len; |
| 1539 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 1540 | unsigned int csize = osb->s_clustersize; |
| 1541 | handle_t *handle; |
| 1542 | |
| 1543 | /* |
| 1544 | * The "start" and "end" values are NOT necessarily part of |
| 1545 | * the range whose allocation is being deleted. Rather, this |
| 1546 | * is what the user passed in with the request. We must zero |
| 1547 | * partial clusters here. There's no need to worry about |
| 1548 | * physical allocation - the zeroing code knows to skip holes. |
| 1549 | */ |
| 1550 | mlog(0, "byte start: %llu, end: %llu\n", |
| 1551 | (unsigned long long)start, (unsigned long long)end); |
| 1552 | |
| 1553 | /* |
| 1554 | * If both edges are on a cluster boundary then there's no |
| 1555 | * zeroing required as the region is part of the allocation to |
| 1556 | * be truncated. |
| 1557 | */ |
| 1558 | if ((start & (csize - 1)) == 0 && (end & (csize - 1)) == 0) |
| 1559 | goto out; |
| 1560 | |
| 1561 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
Jan Kara | fa38e92 | 2008-10-20 19:23:51 +0200 | [diff] [blame] | 1562 | if (IS_ERR(handle)) { |
| 1563 | ret = PTR_ERR(handle); |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1564 | mlog_errno(ret); |
| 1565 | goto out; |
| 1566 | } |
| 1567 | |
| 1568 | /* |
| 1569 | * We want to get the byte offset of the end of the 1st cluster. |
| 1570 | */ |
| 1571 | tmpend = (u64)osb->s_clustersize + (start & ~(osb->s_clustersize - 1)); |
| 1572 | if (tmpend > end) |
| 1573 | tmpend = end; |
| 1574 | |
| 1575 | mlog(0, "1st range: start: %llu, tmpend: %llu\n", |
| 1576 | (unsigned long long)start, (unsigned long long)tmpend); |
| 1577 | |
| 1578 | ret = ocfs2_zero_range_for_truncate(inode, handle, start, tmpend); |
| 1579 | if (ret) |
| 1580 | mlog_errno(ret); |
| 1581 | |
| 1582 | if (tmpend < end) { |
| 1583 | /* |
| 1584 | * This may make start and end equal, but the zeroing |
| 1585 | * code will skip any work in that case so there's no |
| 1586 | * need to catch it up here. |
| 1587 | */ |
| 1588 | start = end & ~(osb->s_clustersize - 1); |
| 1589 | |
| 1590 | mlog(0, "2nd range: start: %llu, end: %llu\n", |
| 1591 | (unsigned long long)start, (unsigned long long)end); |
| 1592 | |
| 1593 | ret = ocfs2_zero_range_for_truncate(inode, handle, start, end); |
| 1594 | if (ret) |
| 1595 | mlog_errno(ret); |
| 1596 | } |
| 1597 | |
| 1598 | ocfs2_commit_trans(osb, handle); |
| 1599 | out: |
| 1600 | return ret; |
| 1601 | } |
| 1602 | |
Tristan Ye | c1631d4 | 2010-05-11 17:54:45 +0800 | [diff] [blame] | 1603 | static int ocfs2_find_rec(struct ocfs2_extent_list *el, u32 pos) |
| 1604 | { |
| 1605 | int i; |
| 1606 | struct ocfs2_extent_rec *rec = NULL; |
| 1607 | |
| 1608 | for (i = le16_to_cpu(el->l_next_free_rec) - 1; i >= 0; i--) { |
| 1609 | |
| 1610 | rec = &el->l_recs[i]; |
| 1611 | |
| 1612 | if (le32_to_cpu(rec->e_cpos) < pos) |
| 1613 | break; |
| 1614 | } |
| 1615 | |
| 1616 | return i; |
| 1617 | } |
| 1618 | |
| 1619 | /* |
| 1620 | * Helper to calculate the punching pos and length in one run, we handle the |
| 1621 | * following three cases in order: |
| 1622 | * |
| 1623 | * - remove the entire record |
| 1624 | * - remove a partial record |
| 1625 | * - no record needs to be removed (hole-punching completed) |
| 1626 | */ |
| 1627 | static void ocfs2_calc_trunc_pos(struct inode *inode, |
| 1628 | struct ocfs2_extent_list *el, |
| 1629 | struct ocfs2_extent_rec *rec, |
| 1630 | u32 trunc_start, u32 *trunc_cpos, |
| 1631 | u32 *trunc_len, u32 *trunc_end, |
| 1632 | u64 *blkno, int *done) |
| 1633 | { |
| 1634 | int ret = 0; |
| 1635 | u32 coff, range; |
| 1636 | |
| 1637 | range = le32_to_cpu(rec->e_cpos) + ocfs2_rec_clusters(el, rec); |
| 1638 | |
| 1639 | if (le32_to_cpu(rec->e_cpos) >= trunc_start) { |
| 1640 | *trunc_cpos = le32_to_cpu(rec->e_cpos); |
| 1641 | /* |
| 1642 | * Skip holes if any. |
| 1643 | */ |
| 1644 | if (range < *trunc_end) |
| 1645 | *trunc_end = range; |
| 1646 | *trunc_len = *trunc_end - le32_to_cpu(rec->e_cpos); |
| 1647 | *blkno = le64_to_cpu(rec->e_blkno); |
| 1648 | *trunc_end = le32_to_cpu(rec->e_cpos); |
| 1649 | } else if (range > trunc_start) { |
| 1650 | *trunc_cpos = trunc_start; |
| 1651 | *trunc_len = *trunc_end - trunc_start; |
| 1652 | coff = trunc_start - le32_to_cpu(rec->e_cpos); |
| 1653 | *blkno = le64_to_cpu(rec->e_blkno) + |
| 1654 | ocfs2_clusters_to_blocks(inode->i_sb, coff); |
| 1655 | *trunc_end = trunc_start; |
| 1656 | } else { |
| 1657 | /* |
| 1658 | * It may have two following possibilities: |
| 1659 | * |
| 1660 | * - last record has been removed |
| 1661 | * - trunc_start was within a hole |
| 1662 | * |
| 1663 | * both two cases mean the completion of hole punching. |
| 1664 | */ |
| 1665 | ret = 1; |
| 1666 | } |
| 1667 | |
| 1668 | *done = ret; |
| 1669 | } |
| 1670 | |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1671 | static int ocfs2_remove_inode_range(struct inode *inode, |
| 1672 | struct buffer_head *di_bh, u64 byte_start, |
| 1673 | u64 byte_len) |
| 1674 | { |
Tristan Ye | c1631d4 | 2010-05-11 17:54:45 +0800 | [diff] [blame] | 1675 | int ret = 0, flags = 0, done = 0, i; |
| 1676 | u32 trunc_start, trunc_len, trunc_end, trunc_cpos, phys_cpos; |
| 1677 | u32 cluster_in_el; |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1678 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 1679 | struct ocfs2_cached_dealloc_ctxt dealloc; |
Mark Fasheh | b1967d0 | 2007-11-20 11:56:39 -0800 | [diff] [blame] | 1680 | struct address_space *mapping = inode->i_mapping; |
Mark Fasheh | fecc011 | 2008-11-12 15:16:38 -0800 | [diff] [blame] | 1681 | struct ocfs2_extent_tree et; |
Tristan Ye | c1631d4 | 2010-05-11 17:54:45 +0800 | [diff] [blame] | 1682 | struct ocfs2_path *path = NULL; |
| 1683 | struct ocfs2_extent_list *el = NULL; |
| 1684 | struct ocfs2_extent_rec *rec = NULL; |
Tristan Ye | e8aec06 | 2010-05-11 17:54:43 +0800 | [diff] [blame] | 1685 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; |
Tristan Ye | c1631d4 | 2010-05-11 17:54:45 +0800 | [diff] [blame] | 1686 | u64 blkno, refcount_loc = le64_to_cpu(di->i_refcount_loc); |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1687 | |
Joel Becker | 5e404e9 | 2009-02-13 03:54:22 -0800 | [diff] [blame] | 1688 | ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), di_bh); |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1689 | ocfs2_init_dealloc_ctxt(&dealloc); |
| 1690 | |
| 1691 | if (byte_len == 0) |
| 1692 | return 0; |
| 1693 | |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 1694 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { |
| 1695 | ret = ocfs2_truncate_inline(inode, di_bh, byte_start, |
Mark Fasheh | b1967d0 | 2007-11-20 11:56:39 -0800 | [diff] [blame] | 1696 | byte_start + byte_len, 0); |
| 1697 | if (ret) { |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 1698 | mlog_errno(ret); |
Mark Fasheh | b1967d0 | 2007-11-20 11:56:39 -0800 | [diff] [blame] | 1699 | goto out; |
| 1700 | } |
| 1701 | /* |
| 1702 | * There's no need to get fancy with the page cache |
| 1703 | * truncate of an inline-data inode. We're talking |
| 1704 | * about less than a page here, which will be cached |
| 1705 | * in the dinode buffer anyway. |
| 1706 | */ |
| 1707 | unmap_mapping_range(mapping, 0, 0, 0); |
| 1708 | truncate_inode_pages(mapping, 0); |
| 1709 | goto out; |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 1710 | } |
| 1711 | |
Tristan Ye | e8aec06 | 2010-05-11 17:54:43 +0800 | [diff] [blame] | 1712 | /* |
| 1713 | * For reflinks, we may need to CoW 2 clusters which might be |
| 1714 | * partially zero'd later, if hole's start and end offset were |
| 1715 | * within one cluster(means is not exactly aligned to clustersize). |
| 1716 | */ |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1717 | |
Tristan Ye | e8aec06 | 2010-05-11 17:54:43 +0800 | [diff] [blame] | 1718 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL) { |
| 1719 | |
| 1720 | ret = ocfs2_cow_file_pos(inode, di_bh, byte_start); |
| 1721 | if (ret) { |
| 1722 | mlog_errno(ret); |
| 1723 | goto out; |
| 1724 | } |
| 1725 | |
| 1726 | ret = ocfs2_cow_file_pos(inode, di_bh, byte_start + byte_len); |
| 1727 | if (ret) { |
| 1728 | mlog_errno(ret); |
| 1729 | goto out; |
| 1730 | } |
| 1731 | } |
| 1732 | |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1733 | trunc_start = ocfs2_clusters_for_bytes(osb->sb, byte_start); |
Tristan Ye | c1631d4 | 2010-05-11 17:54:45 +0800 | [diff] [blame] | 1734 | trunc_end = (byte_start + byte_len) >> osb->s_clustersize_bits; |
| 1735 | cluster_in_el = trunc_end; |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1736 | |
Tristan Ye | c1631d4 | 2010-05-11 17:54:45 +0800 | [diff] [blame] | 1737 | mlog(0, "Inode: %llu, start: %llu, len: %llu, cstart: %u, cend: %u\n", |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1738 | (unsigned long long)OCFS2_I(inode)->ip_blkno, |
| 1739 | (unsigned long long)byte_start, |
Tristan Ye | c1631d4 | 2010-05-11 17:54:45 +0800 | [diff] [blame] | 1740 | (unsigned long long)byte_len, trunc_start, trunc_end); |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1741 | |
| 1742 | ret = ocfs2_zero_partial_clusters(inode, byte_start, byte_len); |
| 1743 | if (ret) { |
| 1744 | mlog_errno(ret); |
| 1745 | goto out; |
| 1746 | } |
| 1747 | |
Tristan Ye | c1631d4 | 2010-05-11 17:54:45 +0800 | [diff] [blame] | 1748 | path = ocfs2_new_path_from_et(&et); |
| 1749 | if (!path) { |
| 1750 | ret = -ENOMEM; |
| 1751 | mlog_errno(ret); |
| 1752 | goto out; |
| 1753 | } |
| 1754 | |
| 1755 | while (trunc_end > trunc_start) { |
| 1756 | |
| 1757 | ret = ocfs2_find_path(INODE_CACHE(inode), path, |
| 1758 | cluster_in_el); |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1759 | if (ret) { |
| 1760 | mlog_errno(ret); |
| 1761 | goto out; |
| 1762 | } |
| 1763 | |
Tristan Ye | c1631d4 | 2010-05-11 17:54:45 +0800 | [diff] [blame] | 1764 | el = path_leaf_el(path); |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1765 | |
Tristan Ye | c1631d4 | 2010-05-11 17:54:45 +0800 | [diff] [blame] | 1766 | i = ocfs2_find_rec(el, trunc_end); |
| 1767 | /* |
| 1768 | * Need to go to previous extent block. |
| 1769 | */ |
| 1770 | if (i < 0) { |
| 1771 | if (path->p_tree_depth == 0) |
| 1772 | break; |
| 1773 | |
| 1774 | ret = ocfs2_find_cpos_for_left_leaf(inode->i_sb, |
| 1775 | path, |
| 1776 | &cluster_in_el); |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1777 | if (ret) { |
| 1778 | mlog_errno(ret); |
| 1779 | goto out; |
| 1780 | } |
Tristan Ye | c1631d4 | 2010-05-11 17:54:45 +0800 | [diff] [blame] | 1781 | |
| 1782 | /* |
| 1783 | * We've reached the leftmost extent block, |
| 1784 | * it's safe to leave. |
| 1785 | */ |
| 1786 | if (cluster_in_el == 0) |
| 1787 | break; |
| 1788 | |
| 1789 | /* |
| 1790 | * The 'pos' searched for previous extent block is |
| 1791 | * always one cluster less than actual trunc_end. |
| 1792 | */ |
| 1793 | trunc_end = cluster_in_el + 1; |
| 1794 | |
| 1795 | ocfs2_reinit_path(path, 1); |
| 1796 | |
| 1797 | continue; |
| 1798 | |
| 1799 | } else |
| 1800 | rec = &el->l_recs[i]; |
| 1801 | |
| 1802 | ocfs2_calc_trunc_pos(inode, el, rec, trunc_start, &trunc_cpos, |
| 1803 | &trunc_len, &trunc_end, &blkno, &done); |
| 1804 | if (done) |
| 1805 | break; |
| 1806 | |
| 1807 | flags = rec->e_flags; |
| 1808 | phys_cpos = ocfs2_blocks_to_clusters(inode->i_sb, blkno); |
| 1809 | |
| 1810 | ret = ocfs2_remove_btree_range(inode, &et, trunc_cpos, |
| 1811 | phys_cpos, trunc_len, flags, |
| 1812 | &dealloc, refcount_loc); |
| 1813 | if (ret < 0) { |
| 1814 | mlog_errno(ret); |
| 1815 | goto out; |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1816 | } |
| 1817 | |
Tristan Ye | c1631d4 | 2010-05-11 17:54:45 +0800 | [diff] [blame] | 1818 | cluster_in_el = trunc_end; |
| 1819 | |
| 1820 | ocfs2_reinit_path(path, 1); |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1821 | } |
| 1822 | |
| 1823 | ocfs2_truncate_cluster_pages(inode, byte_start, byte_len); |
| 1824 | |
| 1825 | out: |
| 1826 | ocfs2_schedule_truncate_log_flush(osb, 1); |
| 1827 | ocfs2_run_deallocs(osb, &dealloc); |
| 1828 | |
| 1829 | return ret; |
| 1830 | } |
| 1831 | |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1832 | /* |
| 1833 | * Parts of this function taken from xfs_change_file_space() |
| 1834 | */ |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1835 | static int __ocfs2_change_file_space(struct file *file, struct inode *inode, |
| 1836 | loff_t f_pos, unsigned int cmd, |
| 1837 | struct ocfs2_space_resv *sr, |
| 1838 | int change_size) |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1839 | { |
| 1840 | int ret; |
| 1841 | s64 llen; |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1842 | loff_t size; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1843 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 1844 | struct buffer_head *di_bh = NULL; |
| 1845 | handle_t *handle; |
Mark Fasheh | a00cce3 | 2007-07-20 11:28:30 -0700 | [diff] [blame] | 1846 | unsigned long long max_off = inode->i_sb->s_maxbytes; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1847 | |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1848 | if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb)) |
| 1849 | return -EROFS; |
| 1850 | |
| 1851 | mutex_lock(&inode->i_mutex); |
| 1852 | |
| 1853 | /* |
| 1854 | * This prevents concurrent writes on other nodes |
| 1855 | */ |
| 1856 | ret = ocfs2_rw_lock(inode, 1); |
| 1857 | if (ret) { |
| 1858 | mlog_errno(ret); |
| 1859 | goto out; |
| 1860 | } |
| 1861 | |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1862 | ret = ocfs2_inode_lock(inode, &di_bh, 1); |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1863 | if (ret) { |
| 1864 | mlog_errno(ret); |
| 1865 | goto out_rw_unlock; |
| 1866 | } |
| 1867 | |
| 1868 | if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) { |
| 1869 | ret = -EPERM; |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1870 | goto out_inode_unlock; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1871 | } |
| 1872 | |
| 1873 | switch (sr->l_whence) { |
| 1874 | case 0: /*SEEK_SET*/ |
| 1875 | break; |
| 1876 | case 1: /*SEEK_CUR*/ |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1877 | sr->l_start += f_pos; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1878 | break; |
| 1879 | case 2: /*SEEK_END*/ |
| 1880 | sr->l_start += i_size_read(inode); |
| 1881 | break; |
| 1882 | default: |
| 1883 | ret = -EINVAL; |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1884 | goto out_inode_unlock; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1885 | } |
| 1886 | sr->l_whence = 0; |
| 1887 | |
| 1888 | llen = sr->l_len > 0 ? sr->l_len - 1 : sr->l_len; |
| 1889 | |
| 1890 | if (sr->l_start < 0 |
| 1891 | || sr->l_start > max_off |
| 1892 | || (sr->l_start + llen) < 0 |
| 1893 | || (sr->l_start + llen) > max_off) { |
| 1894 | ret = -EINVAL; |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1895 | goto out_inode_unlock; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1896 | } |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1897 | size = sr->l_start + sr->l_len; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1898 | |
| 1899 | if (cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) { |
| 1900 | if (sr->l_len <= 0) { |
| 1901 | ret = -EINVAL; |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1902 | goto out_inode_unlock; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1903 | } |
| 1904 | } |
| 1905 | |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1906 | if (file && should_remove_suid(file->f_path.dentry)) { |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1907 | ret = __ocfs2_write_remove_suid(inode, di_bh); |
| 1908 | if (ret) { |
| 1909 | mlog_errno(ret); |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1910 | goto out_inode_unlock; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1911 | } |
| 1912 | } |
| 1913 | |
| 1914 | down_write(&OCFS2_I(inode)->ip_alloc_sem); |
| 1915 | switch (cmd) { |
| 1916 | case OCFS2_IOC_RESVSP: |
| 1917 | case OCFS2_IOC_RESVSP64: |
| 1918 | /* |
| 1919 | * This takes unsigned offsets, but the signed ones we |
| 1920 | * pass have been checked against overflow above. |
| 1921 | */ |
| 1922 | ret = ocfs2_allocate_unwritten_extents(inode, sr->l_start, |
| 1923 | sr->l_len); |
| 1924 | break; |
| 1925 | case OCFS2_IOC_UNRESVSP: |
| 1926 | case OCFS2_IOC_UNRESVSP64: |
| 1927 | ret = ocfs2_remove_inode_range(inode, di_bh, sr->l_start, |
| 1928 | sr->l_len); |
| 1929 | break; |
| 1930 | default: |
| 1931 | ret = -EINVAL; |
| 1932 | } |
| 1933 | up_write(&OCFS2_I(inode)->ip_alloc_sem); |
| 1934 | if (ret) { |
| 1935 | mlog_errno(ret); |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1936 | goto out_inode_unlock; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1937 | } |
| 1938 | |
| 1939 | /* |
| 1940 | * We update c/mtime for these changes |
| 1941 | */ |
| 1942 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
| 1943 | if (IS_ERR(handle)) { |
| 1944 | ret = PTR_ERR(handle); |
| 1945 | mlog_errno(ret); |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1946 | goto out_inode_unlock; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1947 | } |
| 1948 | |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1949 | if (change_size && i_size_read(inode) < size) |
| 1950 | i_size_write(inode, size); |
| 1951 | |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1952 | inode->i_ctime = inode->i_mtime = CURRENT_TIME; |
| 1953 | ret = ocfs2_mark_inode_dirty(handle, inode, di_bh); |
| 1954 | if (ret < 0) |
| 1955 | mlog_errno(ret); |
| 1956 | |
| 1957 | ocfs2_commit_trans(osb, handle); |
| 1958 | |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1959 | out_inode_unlock: |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1960 | brelse(di_bh); |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1961 | ocfs2_inode_unlock(inode, 1); |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1962 | out_rw_unlock: |
| 1963 | ocfs2_rw_unlock(inode, 1); |
| 1964 | |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1965 | out: |
Julia Lawall | c259ae5 | 2008-07-21 09:59:15 +0200 | [diff] [blame] | 1966 | mutex_unlock(&inode->i_mutex); |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1967 | return ret; |
| 1968 | } |
| 1969 | |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1970 | int ocfs2_change_file_space(struct file *file, unsigned int cmd, |
| 1971 | struct ocfs2_space_resv *sr) |
| 1972 | { |
| 1973 | struct inode *inode = file->f_path.dentry->d_inode; |
Fernando Carrijo | c19a28e | 2009-01-07 18:09:08 -0800 | [diff] [blame] | 1974 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1975 | |
| 1976 | if ((cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) && |
| 1977 | !ocfs2_writes_unwritten_extents(osb)) |
| 1978 | return -ENOTTY; |
| 1979 | else if ((cmd == OCFS2_IOC_UNRESVSP || cmd == OCFS2_IOC_UNRESVSP64) && |
| 1980 | !ocfs2_sparse_alloc(osb)) |
| 1981 | return -ENOTTY; |
| 1982 | |
| 1983 | if (!S_ISREG(inode->i_mode)) |
| 1984 | return -EINVAL; |
| 1985 | |
| 1986 | if (!(file->f_mode & FMODE_WRITE)) |
| 1987 | return -EBADF; |
| 1988 | |
| 1989 | return __ocfs2_change_file_space(file, inode, file->f_pos, cmd, sr, 0); |
| 1990 | } |
| 1991 | |
Christoph Hellwig | 2fe17c1 | 2011-01-14 13:07:43 +0100 | [diff] [blame] | 1992 | static long ocfs2_fallocate(struct file *file, int mode, loff_t offset, |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1993 | loff_t len) |
| 1994 | { |
Christoph Hellwig | 2fe17c1 | 2011-01-14 13:07:43 +0100 | [diff] [blame] | 1995 | struct inode *inode = file->f_path.dentry->d_inode; |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1996 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 1997 | struct ocfs2_space_resv sr; |
| 1998 | int change_size = 1; |
Josef Bacik | db47fef | 2010-11-17 20:46:17 -0500 | [diff] [blame] | 1999 | int cmd = OCFS2_IOC_RESVSP64; |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 2000 | |
Christoph Hellwig | 64c23e8 | 2011-01-14 13:07:30 +0100 | [diff] [blame] | 2001 | if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE)) |
| 2002 | return -EOPNOTSUPP; |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 2003 | if (!ocfs2_writes_unwritten_extents(osb)) |
| 2004 | return -EOPNOTSUPP; |
| 2005 | |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 2006 | if (mode & FALLOC_FL_KEEP_SIZE) |
| 2007 | change_size = 0; |
| 2008 | |
Josef Bacik | db47fef | 2010-11-17 20:46:17 -0500 | [diff] [blame] | 2009 | if (mode & FALLOC_FL_PUNCH_HOLE) |
| 2010 | cmd = OCFS2_IOC_UNRESVSP64; |
| 2011 | |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 2012 | sr.l_whence = 0; |
| 2013 | sr.l_start = (s64)offset; |
| 2014 | sr.l_len = (s64)len; |
| 2015 | |
Josef Bacik | db47fef | 2010-11-17 20:46:17 -0500 | [diff] [blame] | 2016 | return __ocfs2_change_file_space(NULL, inode, offset, cmd, &sr, |
| 2017 | change_size); |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 2018 | } |
| 2019 | |
Tao Ma | 293b2f7 | 2009-08-25 08:02:48 +0800 | [diff] [blame] | 2020 | int ocfs2_check_range_for_refcount(struct inode *inode, loff_t pos, |
| 2021 | size_t count) |
| 2022 | { |
| 2023 | int ret = 0; |
| 2024 | unsigned int extent_flags; |
| 2025 | u32 cpos, clusters, extent_len, phys_cpos; |
| 2026 | struct super_block *sb = inode->i_sb; |
| 2027 | |
| 2028 | if (!ocfs2_refcount_tree(OCFS2_SB(inode->i_sb)) || |
Tao Ma | 2f48d59 | 2009-10-15 11:10:49 +0800 | [diff] [blame] | 2029 | !(OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL) || |
| 2030 | OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) |
Tao Ma | 293b2f7 | 2009-08-25 08:02:48 +0800 | [diff] [blame] | 2031 | return 0; |
| 2032 | |
| 2033 | cpos = pos >> OCFS2_SB(sb)->s_clustersize_bits; |
| 2034 | clusters = ocfs2_clusters_for_bytes(sb, pos + count) - cpos; |
| 2035 | |
| 2036 | while (clusters) { |
| 2037 | ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, &extent_len, |
| 2038 | &extent_flags); |
| 2039 | if (ret < 0) { |
| 2040 | mlog_errno(ret); |
| 2041 | goto out; |
| 2042 | } |
| 2043 | |
| 2044 | if (phys_cpos && (extent_flags & OCFS2_EXT_REFCOUNTED)) { |
| 2045 | ret = 1; |
| 2046 | break; |
| 2047 | } |
| 2048 | |
| 2049 | if (extent_len > clusters) |
| 2050 | extent_len = clusters; |
| 2051 | |
| 2052 | clusters -= extent_len; |
| 2053 | cpos += extent_len; |
| 2054 | } |
| 2055 | out: |
| 2056 | return ret; |
| 2057 | } |
| 2058 | |
| 2059 | static int ocfs2_prepare_inode_for_refcount(struct inode *inode, |
Tao Ma | b890823 | 2010-08-12 10:27:14 +0800 | [diff] [blame] | 2060 | struct file *file, |
Tao Ma | 293b2f7 | 2009-08-25 08:02:48 +0800 | [diff] [blame] | 2061 | loff_t pos, size_t count, |
| 2062 | int *meta_level) |
| 2063 | { |
| 2064 | int ret; |
| 2065 | struct buffer_head *di_bh = NULL; |
| 2066 | u32 cpos = pos >> OCFS2_SB(inode->i_sb)->s_clustersize_bits; |
| 2067 | u32 clusters = |
| 2068 | ocfs2_clusters_for_bytes(inode->i_sb, pos + count) - cpos; |
| 2069 | |
| 2070 | ret = ocfs2_inode_lock(inode, &di_bh, 1); |
| 2071 | if (ret) { |
| 2072 | mlog_errno(ret); |
| 2073 | goto out; |
| 2074 | } |
| 2075 | |
| 2076 | *meta_level = 1; |
| 2077 | |
Tao Ma | 1550271 | 2010-08-12 10:36:38 +0800 | [diff] [blame] | 2078 | ret = ocfs2_refcount_cow(inode, file, di_bh, cpos, clusters, UINT_MAX); |
Tao Ma | 293b2f7 | 2009-08-25 08:02:48 +0800 | [diff] [blame] | 2079 | if (ret) |
| 2080 | mlog_errno(ret); |
| 2081 | out: |
| 2082 | brelse(di_bh); |
| 2083 | return ret; |
| 2084 | } |
| 2085 | |
Tao Ma | b890823 | 2010-08-12 10:27:14 +0800 | [diff] [blame] | 2086 | static int ocfs2_prepare_inode_for_write(struct file *file, |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2087 | loff_t *ppos, |
| 2088 | size_t count, |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2089 | int appending, |
Tao Ma | 86470e9 | 2009-12-03 21:55:05 +0800 | [diff] [blame] | 2090 | int *direct_io, |
| 2091 | int *has_refcount) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2092 | { |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 2093 | int ret = 0, meta_level = 0; |
Tao Ma | b890823 | 2010-08-12 10:27:14 +0800 | [diff] [blame] | 2094 | struct dentry *dentry = file->f_path.dentry; |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2095 | struct inode *inode = dentry->d_inode; |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 2096 | loff_t saved_pos, end; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2097 | |
Sunil Mushran | 2bd6321 | 2010-01-25 16:57:38 -0800 | [diff] [blame] | 2098 | /* |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 2099 | * We start with a read level meta lock and only jump to an ex |
| 2100 | * if we need to make modifications here. |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2101 | */ |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2102 | for(;;) { |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 2103 | ret = ocfs2_inode_lock(inode, NULL, meta_level); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2104 | if (ret < 0) { |
| 2105 | meta_level = -1; |
| 2106 | mlog_errno(ret); |
| 2107 | goto out; |
| 2108 | } |
| 2109 | |
| 2110 | /* Clear suid / sgid if necessary. We do this here |
| 2111 | * instead of later in the write path because |
| 2112 | * remove_suid() calls ->setattr without any hint that |
| 2113 | * we may have already done our cluster locking. Since |
| 2114 | * ocfs2_setattr() *must* take cluster locks to |
| 2115 | * proceeed, this will lead us to recursively lock the |
| 2116 | * inode. There's also the dinode i_size state which |
| 2117 | * can be lost via setattr during extending writes (we |
| 2118 | * set inode->i_size at the end of a write. */ |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2119 | if (should_remove_suid(dentry)) { |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2120 | if (meta_level == 0) { |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 2121 | ocfs2_inode_unlock(inode, meta_level); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2122 | meta_level = 1; |
| 2123 | continue; |
| 2124 | } |
| 2125 | |
| 2126 | ret = ocfs2_write_remove_suid(inode); |
| 2127 | if (ret < 0) { |
| 2128 | mlog_errno(ret); |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2129 | goto out_unlock; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2130 | } |
| 2131 | } |
| 2132 | |
| 2133 | /* work on a copy of ppos until we're sure that we won't have |
| 2134 | * to recalculate it due to relocking. */ |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2135 | if (appending) { |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2136 | saved_pos = i_size_read(inode); |
| 2137 | mlog(0, "O_APPEND: inode->i_size=%llu\n", saved_pos); |
| 2138 | } else { |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2139 | saved_pos = *ppos; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2140 | } |
Mark Fasheh | 3a0782d | 2007-01-17 12:53:31 -0800 | [diff] [blame] | 2141 | |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 2142 | end = saved_pos + count; |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2143 | |
Tao Ma | 293b2f7 | 2009-08-25 08:02:48 +0800 | [diff] [blame] | 2144 | ret = ocfs2_check_range_for_refcount(inode, saved_pos, count); |
| 2145 | if (ret == 1) { |
| 2146 | ocfs2_inode_unlock(inode, meta_level); |
| 2147 | meta_level = -1; |
| 2148 | |
| 2149 | ret = ocfs2_prepare_inode_for_refcount(inode, |
Tao Ma | b890823 | 2010-08-12 10:27:14 +0800 | [diff] [blame] | 2150 | file, |
Tao Ma | 293b2f7 | 2009-08-25 08:02:48 +0800 | [diff] [blame] | 2151 | saved_pos, |
| 2152 | count, |
| 2153 | &meta_level); |
Tao Ma | 86470e9 | 2009-12-03 21:55:05 +0800 | [diff] [blame] | 2154 | if (has_refcount) |
| 2155 | *has_refcount = 1; |
Wengang Wang | 96a1cc7 | 2010-02-09 14:57:45 +0800 | [diff] [blame] | 2156 | if (direct_io) |
| 2157 | *direct_io = 0; |
Tao Ma | 293b2f7 | 2009-08-25 08:02:48 +0800 | [diff] [blame] | 2158 | } |
| 2159 | |
| 2160 | if (ret < 0) { |
| 2161 | mlog_errno(ret); |
| 2162 | goto out_unlock; |
| 2163 | } |
| 2164 | |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 2165 | /* |
| 2166 | * Skip the O_DIRECT checks if we don't need |
| 2167 | * them. |
| 2168 | */ |
| 2169 | if (!direct_io || !(*direct_io)) |
| 2170 | break; |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2171 | |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 2172 | /* |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 2173 | * There's no sane way to do direct writes to an inode |
| 2174 | * with inline data. |
| 2175 | */ |
| 2176 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { |
| 2177 | *direct_io = 0; |
| 2178 | break; |
| 2179 | } |
| 2180 | |
| 2181 | /* |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 2182 | * Allowing concurrent direct writes means |
| 2183 | * i_size changes wouldn't be synchronized, so |
| 2184 | * one node could wind up truncating another |
| 2185 | * nodes writes. |
| 2186 | */ |
| 2187 | if (end > i_size_read(inode)) { |
| 2188 | *direct_io = 0; |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2189 | break; |
| 2190 | } |
| 2191 | |
Mark Fasheh | 3a0782d | 2007-01-17 12:53:31 -0800 | [diff] [blame] | 2192 | /* |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 2193 | * We don't fill holes during direct io, so |
| 2194 | * check for them here. If any are found, the |
| 2195 | * caller will have to retake some cluster |
| 2196 | * locks and initiate the io as buffered. |
Mark Fasheh | 3a0782d | 2007-01-17 12:53:31 -0800 | [diff] [blame] | 2197 | */ |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 2198 | ret = ocfs2_check_range_for_holes(inode, saved_pos, count); |
| 2199 | if (ret == 1) { |
| 2200 | *direct_io = 0; |
| 2201 | ret = 0; |
| 2202 | } else if (ret < 0) |
| 2203 | mlog_errno(ret); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2204 | break; |
| 2205 | } |
| 2206 | |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2207 | if (appending) |
| 2208 | *ppos = saved_pos; |
| 2209 | |
| 2210 | out_unlock: |
Tao Ma | 293b2f7 | 2009-08-25 08:02:48 +0800 | [diff] [blame] | 2211 | if (meta_level >= 0) |
| 2212 | ocfs2_inode_unlock(inode, meta_level); |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2213 | |
| 2214 | out: |
| 2215 | return ret; |
| 2216 | } |
| 2217 | |
| 2218 | static ssize_t ocfs2_file_aio_write(struct kiocb *iocb, |
| 2219 | const struct iovec *iov, |
| 2220 | unsigned long nr_segs, |
| 2221 | loff_t pos) |
| 2222 | { |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2223 | int ret, direct_io, appending, rw_level, have_alloc_sem = 0; |
Tao Ma | 86470e9 | 2009-12-03 21:55:05 +0800 | [diff] [blame] | 2224 | int can_do_direct, has_refcount = 0; |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2225 | ssize_t written = 0; |
| 2226 | size_t ocount; /* original count */ |
| 2227 | size_t count; /* after file limit checks */ |
Mark Fasheh | 9ea2d32 | 2007-10-18 14:14:45 -0700 | [diff] [blame] | 2228 | loff_t old_size, *ppos = &iocb->ki_pos; |
| 2229 | u32 old_clusters; |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2230 | struct file *file = iocb->ki_filp; |
| 2231 | struct inode *inode = file->f_path.dentry->d_inode; |
Mark Fasheh | 9ea2d32 | 2007-10-18 14:14:45 -0700 | [diff] [blame] | 2232 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
Tristan Ye | 7bdb0d1 | 2010-10-11 16:46:39 +0800 | [diff] [blame] | 2233 | int full_coherency = !(osb->s_mount_opt & |
| 2234 | OCFS2_MOUNT_COHERENCY_BUFFERED); |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2235 | |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2236 | mlog_entry("(0x%p, %u, '%.*s')\n", file, |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2237 | (unsigned int)nr_segs, |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2238 | file->f_path.dentry->d_name.len, |
| 2239 | file->f_path.dentry->d_name.name); |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2240 | |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2241 | if (iocb->ki_left == 0) |
| 2242 | return 0; |
| 2243 | |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2244 | vfs_check_frozen(inode->i_sb, SB_FREEZE_WRITE); |
| 2245 | |
| 2246 | appending = file->f_flags & O_APPEND ? 1 : 0; |
| 2247 | direct_io = file->f_flags & O_DIRECT ? 1 : 0; |
| 2248 | |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2249 | mutex_lock(&inode->i_mutex); |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2250 | |
Tristan Ye | 39c99f1 | 2010-12-07 14:35:07 +0800 | [diff] [blame] | 2251 | ocfs2_iocb_clear_sem_locked(iocb); |
| 2252 | |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2253 | relock: |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2254 | /* to match setattr's i_mutex -> i_alloc_sem -> rw_lock ordering */ |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2255 | if (direct_io) { |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2256 | down_read(&inode->i_alloc_sem); |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2257 | have_alloc_sem = 1; |
Tristan Ye | 39c99f1 | 2010-12-07 14:35:07 +0800 | [diff] [blame] | 2258 | /* communicate with ocfs2_dio_end_io */ |
| 2259 | ocfs2_iocb_set_sem_locked(iocb); |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2260 | } |
| 2261 | |
Tristan Ye | 7bdb0d1 | 2010-10-11 16:46:39 +0800 | [diff] [blame] | 2262 | /* |
| 2263 | * Concurrent O_DIRECT writes are allowed with |
| 2264 | * mount_option "coherency=buffered". |
| 2265 | */ |
| 2266 | rw_level = (!direct_io || full_coherency); |
| 2267 | |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2268 | ret = ocfs2_rw_lock(inode, rw_level); |
| 2269 | if (ret < 0) { |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2270 | mlog_errno(ret); |
| 2271 | goto out_sems; |
| 2272 | } |
| 2273 | |
Tristan Ye | 7bdb0d1 | 2010-10-11 16:46:39 +0800 | [diff] [blame] | 2274 | /* |
| 2275 | * O_DIRECT writes with "coherency=full" need to take EX cluster |
| 2276 | * inode_lock to guarantee coherency. |
| 2277 | */ |
| 2278 | if (direct_io && full_coherency) { |
| 2279 | /* |
| 2280 | * We need to take and drop the inode lock to force |
| 2281 | * other nodes to drop their caches. Buffered I/O |
| 2282 | * already does this in write_begin(). |
| 2283 | */ |
| 2284 | ret = ocfs2_inode_lock(inode, NULL, 1); |
| 2285 | if (ret < 0) { |
| 2286 | mlog_errno(ret); |
| 2287 | goto out_sems; |
| 2288 | } |
| 2289 | |
| 2290 | ocfs2_inode_unlock(inode, 1); |
| 2291 | } |
| 2292 | |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2293 | can_do_direct = direct_io; |
Tao Ma | b890823 | 2010-08-12 10:27:14 +0800 | [diff] [blame] | 2294 | ret = ocfs2_prepare_inode_for_write(file, ppos, |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2295 | iocb->ki_left, appending, |
Tao Ma | 86470e9 | 2009-12-03 21:55:05 +0800 | [diff] [blame] | 2296 | &can_do_direct, &has_refcount); |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2297 | if (ret < 0) { |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2298 | mlog_errno(ret); |
| 2299 | goto out; |
| 2300 | } |
| 2301 | |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2302 | /* |
| 2303 | * We can't complete the direct I/O as requested, fall back to |
| 2304 | * buffered I/O. |
| 2305 | */ |
| 2306 | if (direct_io && !can_do_direct) { |
| 2307 | ocfs2_rw_unlock(inode, rw_level); |
| 2308 | up_read(&inode->i_alloc_sem); |
| 2309 | |
| 2310 | have_alloc_sem = 0; |
| 2311 | rw_level = -1; |
| 2312 | |
| 2313 | direct_io = 0; |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2314 | goto relock; |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2315 | } |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2316 | |
Mark Fasheh | 9ea2d32 | 2007-10-18 14:14:45 -0700 | [diff] [blame] | 2317 | /* |
| 2318 | * To later detect whether a journal commit for sync writes is |
| 2319 | * necessary, we sample i_size, and cluster count here. |
| 2320 | */ |
| 2321 | old_size = i_size_read(inode); |
| 2322 | old_clusters = OCFS2_I(inode)->ip_clusters; |
| 2323 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2324 | /* communicate with ocfs2_dio_end_io */ |
Mark Fasheh | 7cdfc3a | 2007-04-16 17:28:51 -0700 | [diff] [blame] | 2325 | ocfs2_iocb_set_rw_locked(iocb, rw_level); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2326 | |
Li Dongyang | 6b933c8 | 2010-04-17 17:49:10 +0800 | [diff] [blame] | 2327 | ret = generic_segment_checks(iov, &nr_segs, &ocount, |
| 2328 | VERIFY_READ); |
| 2329 | if (ret) |
| 2330 | goto out_dio; |
| 2331 | |
| 2332 | count = ocount; |
| 2333 | ret = generic_write_checks(file, ppos, &count, |
| 2334 | S_ISBLK(inode->i_mode)); |
| 2335 | if (ret) |
| 2336 | goto out_dio; |
| 2337 | |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2338 | if (direct_io) { |
| 2339 | written = generic_file_direct_write(iocb, iov, &nr_segs, *ppos, |
| 2340 | ppos, count, ocount); |
| 2341 | if (written < 0) { |
| 2342 | ret = written; |
| 2343 | goto out_dio; |
| 2344 | } |
| 2345 | } else { |
Li Dongyang | 6b933c8 | 2010-04-17 17:49:10 +0800 | [diff] [blame] | 2346 | current->backing_dev_info = file->f_mapping->backing_dev_info; |
| 2347 | written = generic_file_buffered_write(iocb, iov, nr_segs, *ppos, |
| 2348 | ppos, count, 0); |
| 2349 | current->backing_dev_info = NULL; |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2350 | } |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2351 | |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2352 | out_dio: |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2353 | /* buffered aio wouldn't have proper lock coverage today */ |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2354 | BUG_ON(ret == -EIOCBQUEUED && !(file->f_flags & O_DIRECT)); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2355 | |
Tao Ma | 60c4867 | 2010-02-03 09:56:04 +0800 | [diff] [blame] | 2356 | if (((file->f_flags & O_DSYNC) && !direct_io) || IS_SYNC(inode) || |
Tristan Ye | 81c8c82 | 2010-08-19 15:15:00 +0800 | [diff] [blame] | 2357 | ((file->f_flags & O_DIRECT) && !direct_io)) { |
Jan Kara | 918941a | 2009-08-17 18:50:08 +0200 | [diff] [blame] | 2358 | ret = filemap_fdatawrite_range(file->f_mapping, pos, |
| 2359 | pos + count - 1); |
| 2360 | if (ret < 0) |
| 2361 | written = ret; |
| 2362 | |
Coly Li | a03ab78 | 2010-03-26 05:15:12 +0800 | [diff] [blame] | 2363 | if (!ret && ((old_size != i_size_read(inode)) || |
| 2364 | (old_clusters != OCFS2_I(inode)->ip_clusters) || |
| 2365 | has_refcount)) { |
Joel Becker | 2b4e30f | 2008-09-03 20:03:41 -0700 | [diff] [blame] | 2366 | ret = jbd2_journal_force_commit(osb->journal->j_journal); |
Mark Fasheh | 9ea2d32 | 2007-10-18 14:14:45 -0700 | [diff] [blame] | 2367 | if (ret < 0) |
| 2368 | written = ret; |
| 2369 | } |
Jan Kara | 918941a | 2009-08-17 18:50:08 +0200 | [diff] [blame] | 2370 | |
| 2371 | if (!ret) |
| 2372 | ret = filemap_fdatawait_range(file->f_mapping, pos, |
| 2373 | pos + count - 1); |
Mark Fasheh | 9ea2d32 | 2007-10-18 14:14:45 -0700 | [diff] [blame] | 2374 | } |
| 2375 | |
Sunil Mushran | 2bd6321 | 2010-01-25 16:57:38 -0800 | [diff] [blame] | 2376 | /* |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2377 | * deep in g_f_a_w_n()->ocfs2_direct_IO we pass in a ocfs2_dio_end_io |
| 2378 | * function pointer which is called when o_direct io completes so that |
| 2379 | * it can unlock our rw lock. (it's the clustered equivalent of |
| 2380 | * i_alloc_sem; protects truncate from racing with pending ios). |
| 2381 | * Unfortunately there are error cases which call end_io and others |
| 2382 | * that don't. so we don't have to unlock the rw_lock if either an |
| 2383 | * async dio is going to do it in the future or an end_io after an |
| 2384 | * error has already done it. |
| 2385 | */ |
Coly Li | 66b116c | 2010-02-25 14:57:13 +0800 | [diff] [blame] | 2386 | if ((ret == -EIOCBQUEUED) || (!ocfs2_iocb_is_rw_locked(iocb))) { |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2387 | rw_level = -1; |
| 2388 | have_alloc_sem = 0; |
| 2389 | } |
| 2390 | |
| 2391 | out: |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2392 | if (rw_level != -1) |
| 2393 | ocfs2_rw_unlock(inode, rw_level); |
| 2394 | |
| 2395 | out_sems: |
Tristan Ye | 39c99f1 | 2010-12-07 14:35:07 +0800 | [diff] [blame] | 2396 | if (have_alloc_sem) { |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2397 | up_read(&inode->i_alloc_sem); |
Tristan Ye | 39c99f1 | 2010-12-07 14:35:07 +0800 | [diff] [blame] | 2398 | ocfs2_iocb_clear_sem_locked(iocb); |
| 2399 | } |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2400 | |
Jes Sorensen | 1b1dcc1 | 2006-01-09 15:59:24 -0800 | [diff] [blame] | 2401 | mutex_unlock(&inode->i_mutex); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2402 | |
Wengang Wang | 812e7a6 | 2009-07-10 13:26:04 +0800 | [diff] [blame] | 2403 | if (written) |
| 2404 | ret = written; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2405 | mlog_exit(ret); |
Wengang Wang | 812e7a6 | 2009-07-10 13:26:04 +0800 | [diff] [blame] | 2406 | return ret; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2407 | } |
| 2408 | |
Miklos Szeredi | 328eaab | 2009-04-14 19:48:39 +0200 | [diff] [blame] | 2409 | static int ocfs2_splice_to_file(struct pipe_inode_info *pipe, |
| 2410 | struct file *out, |
| 2411 | struct splice_desc *sd) |
| 2412 | { |
| 2413 | int ret; |
| 2414 | |
Tao Ma | b890823 | 2010-08-12 10:27:14 +0800 | [diff] [blame] | 2415 | ret = ocfs2_prepare_inode_for_write(out, &sd->pos, |
Tao Ma | 86470e9 | 2009-12-03 21:55:05 +0800 | [diff] [blame] | 2416 | sd->total_len, 0, NULL, NULL); |
Miklos Szeredi | 328eaab | 2009-04-14 19:48:39 +0200 | [diff] [blame] | 2417 | if (ret < 0) { |
| 2418 | mlog_errno(ret); |
| 2419 | return ret; |
| 2420 | } |
| 2421 | |
| 2422 | return splice_from_pipe_feed(pipe, sd, pipe_to_file); |
| 2423 | } |
| 2424 | |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2425 | static ssize_t ocfs2_file_splice_write(struct pipe_inode_info *pipe, |
| 2426 | struct file *out, |
| 2427 | loff_t *ppos, |
| 2428 | size_t len, |
| 2429 | unsigned int flags) |
| 2430 | { |
| 2431 | int ret; |
Miklos Szeredi | 328eaab | 2009-04-14 19:48:39 +0200 | [diff] [blame] | 2432 | struct address_space *mapping = out->f_mapping; |
| 2433 | struct inode *inode = mapping->host; |
| 2434 | struct splice_desc sd = { |
| 2435 | .total_len = len, |
| 2436 | .flags = flags, |
| 2437 | .pos = *ppos, |
| 2438 | .u.file = out, |
| 2439 | }; |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2440 | |
| 2441 | mlog_entry("(0x%p, 0x%p, %u, '%.*s')\n", out, pipe, |
| 2442 | (unsigned int)len, |
Josef Sipek | d28c917 | 2006-12-08 02:37:25 -0800 | [diff] [blame] | 2443 | out->f_path.dentry->d_name.len, |
| 2444 | out->f_path.dentry->d_name.name); |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2445 | |
Miklos Szeredi | 7bfac9e | 2009-04-06 17:41:00 +0200 | [diff] [blame] | 2446 | if (pipe->inode) |
Miklos Szeredi | 328eaab | 2009-04-14 19:48:39 +0200 | [diff] [blame] | 2447 | mutex_lock_nested(&pipe->inode->i_mutex, I_MUTEX_PARENT); |
| 2448 | |
| 2449 | splice_from_pipe_begin(&sd); |
| 2450 | do { |
| 2451 | ret = splice_from_pipe_next(pipe, &sd); |
| 2452 | if (ret <= 0) |
| 2453 | break; |
| 2454 | |
| 2455 | mutex_lock_nested(&inode->i_mutex, I_MUTEX_CHILD); |
| 2456 | ret = ocfs2_rw_lock(inode, 1); |
| 2457 | if (ret < 0) |
| 2458 | mlog_errno(ret); |
| 2459 | else { |
| 2460 | ret = ocfs2_splice_to_file(pipe, out, &sd); |
| 2461 | ocfs2_rw_unlock(inode, 1); |
| 2462 | } |
| 2463 | mutex_unlock(&inode->i_mutex); |
| 2464 | } while (ret > 0); |
| 2465 | splice_from_pipe_end(pipe, &sd); |
| 2466 | |
Miklos Szeredi | 7bfac9e | 2009-04-06 17:41:00 +0200 | [diff] [blame] | 2467 | if (pipe->inode) |
| 2468 | mutex_unlock(&pipe->inode->i_mutex); |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2469 | |
Miklos Szeredi | 328eaab | 2009-04-14 19:48:39 +0200 | [diff] [blame] | 2470 | if (sd.num_spliced) |
| 2471 | ret = sd.num_spliced; |
| 2472 | |
| 2473 | if (ret > 0) { |
| 2474 | unsigned long nr_pages; |
Jan Kara | d23c937 | 2009-08-18 18:24:31 +0200 | [diff] [blame] | 2475 | int err; |
Miklos Szeredi | 328eaab | 2009-04-14 19:48:39 +0200 | [diff] [blame] | 2476 | |
Miklos Szeredi | 328eaab | 2009-04-14 19:48:39 +0200 | [diff] [blame] | 2477 | nr_pages = (ret + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; |
| 2478 | |
Jan Kara | d23c937 | 2009-08-18 18:24:31 +0200 | [diff] [blame] | 2479 | err = generic_write_sync(out, *ppos, ret); |
| 2480 | if (err) |
| 2481 | ret = err; |
| 2482 | else |
| 2483 | *ppos += ret; |
Miklos Szeredi | 328eaab | 2009-04-14 19:48:39 +0200 | [diff] [blame] | 2484 | |
Miklos Szeredi | 328eaab | 2009-04-14 19:48:39 +0200 | [diff] [blame] | 2485 | balance_dirty_pages_ratelimited_nr(mapping, nr_pages); |
| 2486 | } |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2487 | |
| 2488 | mlog_exit(ret); |
| 2489 | return ret; |
| 2490 | } |
| 2491 | |
| 2492 | static ssize_t ocfs2_file_splice_read(struct file *in, |
| 2493 | loff_t *ppos, |
| 2494 | struct pipe_inode_info *pipe, |
| 2495 | size_t len, |
| 2496 | unsigned int flags) |
| 2497 | { |
Tao Ma | 1962f39 | 2009-06-19 15:36:52 +0800 | [diff] [blame] | 2498 | int ret = 0, lock_level = 0; |
Josef Sipek | d28c917 | 2006-12-08 02:37:25 -0800 | [diff] [blame] | 2499 | struct inode *inode = in->f_path.dentry->d_inode; |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2500 | |
| 2501 | mlog_entry("(0x%p, 0x%p, %u, '%.*s')\n", in, pipe, |
| 2502 | (unsigned int)len, |
Josef Sipek | d28c917 | 2006-12-08 02:37:25 -0800 | [diff] [blame] | 2503 | in->f_path.dentry->d_name.len, |
| 2504 | in->f_path.dentry->d_name.name); |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2505 | |
| 2506 | /* |
| 2507 | * See the comment in ocfs2_file_aio_read() |
| 2508 | */ |
Tao Ma | 1962f39 | 2009-06-19 15:36:52 +0800 | [diff] [blame] | 2509 | ret = ocfs2_inode_lock_atime(inode, in->f_vfsmnt, &lock_level); |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2510 | if (ret < 0) { |
| 2511 | mlog_errno(ret); |
| 2512 | goto bail; |
| 2513 | } |
Tao Ma | 1962f39 | 2009-06-19 15:36:52 +0800 | [diff] [blame] | 2514 | ocfs2_inode_unlock(inode, lock_level); |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2515 | |
| 2516 | ret = generic_file_splice_read(in, ppos, pipe, len, flags); |
| 2517 | |
| 2518 | bail: |
| 2519 | mlog_exit(ret); |
| 2520 | return ret; |
| 2521 | } |
| 2522 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2523 | static ssize_t ocfs2_file_aio_read(struct kiocb *iocb, |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 2524 | const struct iovec *iov, |
| 2525 | unsigned long nr_segs, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2526 | loff_t pos) |
| 2527 | { |
Tiger Yang | 25899de | 2006-11-15 15:49:02 +0800 | [diff] [blame] | 2528 | int ret = 0, rw_level = -1, have_alloc_sem = 0, lock_level = 0; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2529 | struct file *filp = iocb->ki_filp; |
Josef Sipek | d28c917 | 2006-12-08 02:37:25 -0800 | [diff] [blame] | 2530 | struct inode *inode = filp->f_path.dentry->d_inode; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2531 | |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 2532 | mlog_entry("(0x%p, %u, '%.*s')\n", filp, |
| 2533 | (unsigned int)nr_segs, |
Josef Sipek | d28c917 | 2006-12-08 02:37:25 -0800 | [diff] [blame] | 2534 | filp->f_path.dentry->d_name.len, |
| 2535 | filp->f_path.dentry->d_name.name); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2536 | |
| 2537 | if (!inode) { |
| 2538 | ret = -EINVAL; |
| 2539 | mlog_errno(ret); |
| 2540 | goto bail; |
| 2541 | } |
| 2542 | |
Tristan Ye | 39c99f1 | 2010-12-07 14:35:07 +0800 | [diff] [blame] | 2543 | ocfs2_iocb_clear_sem_locked(iocb); |
| 2544 | |
Sunil Mushran | 2bd6321 | 2010-01-25 16:57:38 -0800 | [diff] [blame] | 2545 | /* |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2546 | * buffered reads protect themselves in ->readpage(). O_DIRECT reads |
| 2547 | * need locks to protect pending reads from racing with truncate. |
| 2548 | */ |
| 2549 | if (filp->f_flags & O_DIRECT) { |
| 2550 | down_read(&inode->i_alloc_sem); |
| 2551 | have_alloc_sem = 1; |
Tristan Ye | 39c99f1 | 2010-12-07 14:35:07 +0800 | [diff] [blame] | 2552 | ocfs2_iocb_set_sem_locked(iocb); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2553 | |
| 2554 | ret = ocfs2_rw_lock(inode, 0); |
| 2555 | if (ret < 0) { |
| 2556 | mlog_errno(ret); |
| 2557 | goto bail; |
| 2558 | } |
| 2559 | rw_level = 0; |
| 2560 | /* communicate with ocfs2_dio_end_io */ |
Mark Fasheh | 7cdfc3a | 2007-04-16 17:28:51 -0700 | [diff] [blame] | 2561 | ocfs2_iocb_set_rw_locked(iocb, rw_level); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2562 | } |
| 2563 | |
Mark Fasheh | c4374f8 | 2006-05-05 19:04:35 -0700 | [diff] [blame] | 2564 | /* |
| 2565 | * We're fine letting folks race truncates and extending |
| 2566 | * writes with read across the cluster, just like they can |
| 2567 | * locally. Hence no rw_lock during read. |
Sunil Mushran | 2bd6321 | 2010-01-25 16:57:38 -0800 | [diff] [blame] | 2568 | * |
Mark Fasheh | c4374f8 | 2006-05-05 19:04:35 -0700 | [diff] [blame] | 2569 | * Take and drop the meta data lock to update inode fields |
| 2570 | * like i_size. This allows the checks down below |
Sunil Mushran | 2bd6321 | 2010-01-25 16:57:38 -0800 | [diff] [blame] | 2571 | * generic_file_aio_read() a chance of actually working. |
Mark Fasheh | c4374f8 | 2006-05-05 19:04:35 -0700 | [diff] [blame] | 2572 | */ |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 2573 | ret = ocfs2_inode_lock_atime(inode, filp->f_vfsmnt, &lock_level); |
Mark Fasheh | c4374f8 | 2006-05-05 19:04:35 -0700 | [diff] [blame] | 2574 | if (ret < 0) { |
| 2575 | mlog_errno(ret); |
| 2576 | goto bail; |
| 2577 | } |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 2578 | ocfs2_inode_unlock(inode, lock_level); |
Mark Fasheh | c4374f8 | 2006-05-05 19:04:35 -0700 | [diff] [blame] | 2579 | |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 2580 | ret = generic_file_aio_read(iocb, iov, nr_segs, iocb->ki_pos); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2581 | if (ret == -EINVAL) |
Sunil Mushran | 56753bd | 2008-06-09 11:24:41 -0700 | [diff] [blame] | 2582 | mlog(0, "generic_file_aio_read returned -EINVAL\n"); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2583 | |
| 2584 | /* buffered aio wouldn't have proper lock coverage today */ |
| 2585 | BUG_ON(ret == -EIOCBQUEUED && !(filp->f_flags & O_DIRECT)); |
| 2586 | |
| 2587 | /* see ocfs2_file_aio_write */ |
| 2588 | if (ret == -EIOCBQUEUED || !ocfs2_iocb_is_rw_locked(iocb)) { |
| 2589 | rw_level = -1; |
| 2590 | have_alloc_sem = 0; |
| 2591 | } |
| 2592 | |
| 2593 | bail: |
Tristan Ye | 39c99f1 | 2010-12-07 14:35:07 +0800 | [diff] [blame] | 2594 | if (have_alloc_sem) { |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2595 | up_read(&inode->i_alloc_sem); |
Tristan Ye | 39c99f1 | 2010-12-07 14:35:07 +0800 | [diff] [blame] | 2596 | ocfs2_iocb_clear_sem_locked(iocb); |
| 2597 | } |
Sunil Mushran | 2bd6321 | 2010-01-25 16:57:38 -0800 | [diff] [blame] | 2598 | if (rw_level != -1) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2599 | ocfs2_rw_unlock(inode, rw_level); |
| 2600 | mlog_exit(ret); |
| 2601 | |
| 2602 | return ret; |
| 2603 | } |
| 2604 | |
Arjan van de Ven | 92e1d5b | 2007-02-12 00:55:39 -0800 | [diff] [blame] | 2605 | const struct inode_operations ocfs2_file_iops = { |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2606 | .setattr = ocfs2_setattr, |
| 2607 | .getattr = ocfs2_getattr, |
Tiger Yang | d38eb8d | 2006-11-27 09:59:21 +0800 | [diff] [blame] | 2608 | .permission = ocfs2_permission, |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 2609 | .setxattr = generic_setxattr, |
| 2610 | .getxattr = generic_getxattr, |
| 2611 | .listxattr = ocfs2_listxattr, |
| 2612 | .removexattr = generic_removexattr, |
Mark Fasheh | 00dc417 | 2008-10-03 17:32:11 -0400 | [diff] [blame] | 2613 | .fiemap = ocfs2_fiemap, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2614 | }; |
| 2615 | |
Arjan van de Ven | 92e1d5b | 2007-02-12 00:55:39 -0800 | [diff] [blame] | 2616 | const struct inode_operations ocfs2_special_file_iops = { |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2617 | .setattr = ocfs2_setattr, |
| 2618 | .getattr = ocfs2_getattr, |
Tiger Yang | d38eb8d | 2006-11-27 09:59:21 +0800 | [diff] [blame] | 2619 | .permission = ocfs2_permission, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2620 | }; |
| 2621 | |
Mark Fasheh | 53da493 | 2008-07-21 14:29:16 -0700 | [diff] [blame] | 2622 | /* |
| 2623 | * Other than ->lock, keep ocfs2_fops and ocfs2_dops in sync with |
| 2624 | * ocfs2_fops_no_plocks and ocfs2_dops_no_plocks! |
| 2625 | */ |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 2626 | const struct file_operations ocfs2_fops = { |
Jan Kara | 32c3c0e | 2007-12-19 15:24:52 +0100 | [diff] [blame] | 2627 | .llseek = generic_file_llseek, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2628 | .read = do_sync_read, |
| 2629 | .write = do_sync_write, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2630 | .mmap = ocfs2_mmap, |
| 2631 | .fsync = ocfs2_sync_file, |
| 2632 | .release = ocfs2_file_release, |
| 2633 | .open = ocfs2_file_open, |
| 2634 | .aio_read = ocfs2_file_aio_read, |
| 2635 | .aio_write = ocfs2_file_aio_write, |
Andi Kleen | c9ec148 | 2008-01-27 03:17:17 +0100 | [diff] [blame] | 2636 | .unlocked_ioctl = ocfs2_ioctl, |
Mark Fasheh | 586d232 | 2007-03-09 15:56:28 -0800 | [diff] [blame] | 2637 | #ifdef CONFIG_COMPAT |
| 2638 | .compat_ioctl = ocfs2_compat_ioctl, |
| 2639 | #endif |
Mark Fasheh | 53da493 | 2008-07-21 14:29:16 -0700 | [diff] [blame] | 2640 | .lock = ocfs2_lock, |
| 2641 | .flock = ocfs2_flock, |
| 2642 | .splice_read = ocfs2_file_splice_read, |
| 2643 | .splice_write = ocfs2_file_splice_write, |
Christoph Hellwig | 2fe17c1 | 2011-01-14 13:07:43 +0100 | [diff] [blame] | 2644 | .fallocate = ocfs2_fallocate, |
Mark Fasheh | 53da493 | 2008-07-21 14:29:16 -0700 | [diff] [blame] | 2645 | }; |
| 2646 | |
| 2647 | const struct file_operations ocfs2_dops = { |
| 2648 | .llseek = generic_file_llseek, |
| 2649 | .read = generic_read_dir, |
| 2650 | .readdir = ocfs2_readdir, |
| 2651 | .fsync = ocfs2_sync_file, |
| 2652 | .release = ocfs2_dir_release, |
| 2653 | .open = ocfs2_dir_open, |
| 2654 | .unlocked_ioctl = ocfs2_ioctl, |
| 2655 | #ifdef CONFIG_COMPAT |
| 2656 | .compat_ioctl = ocfs2_compat_ioctl, |
| 2657 | #endif |
| 2658 | .lock = ocfs2_lock, |
| 2659 | .flock = ocfs2_flock, |
| 2660 | }; |
| 2661 | |
| 2662 | /* |
| 2663 | * POSIX-lockless variants of our file_operations. |
| 2664 | * |
| 2665 | * These will be used if the underlying cluster stack does not support |
| 2666 | * posix file locking, if the user passes the "localflocks" mount |
| 2667 | * option, or if we have a local-only fs. |
| 2668 | * |
| 2669 | * ocfs2_flock is in here because all stacks handle UNIX file locks, |
| 2670 | * so we still want it in the case of no stack support for |
| 2671 | * plocks. Internally, it will do the right thing when asked to ignore |
| 2672 | * the cluster. |
| 2673 | */ |
| 2674 | const struct file_operations ocfs2_fops_no_plocks = { |
| 2675 | .llseek = generic_file_llseek, |
| 2676 | .read = do_sync_read, |
| 2677 | .write = do_sync_write, |
| 2678 | .mmap = ocfs2_mmap, |
| 2679 | .fsync = ocfs2_sync_file, |
| 2680 | .release = ocfs2_file_release, |
| 2681 | .open = ocfs2_file_open, |
| 2682 | .aio_read = ocfs2_file_aio_read, |
| 2683 | .aio_write = ocfs2_file_aio_write, |
| 2684 | .unlocked_ioctl = ocfs2_ioctl, |
| 2685 | #ifdef CONFIG_COMPAT |
| 2686 | .compat_ioctl = ocfs2_compat_ioctl, |
| 2687 | #endif |
Mark Fasheh | 53fc622 | 2007-12-20 16:49:04 -0800 | [diff] [blame] | 2688 | .flock = ocfs2_flock, |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2689 | .splice_read = ocfs2_file_splice_read, |
| 2690 | .splice_write = ocfs2_file_splice_write, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2691 | }; |
| 2692 | |
Mark Fasheh | 53da493 | 2008-07-21 14:29:16 -0700 | [diff] [blame] | 2693 | const struct file_operations ocfs2_dops_no_plocks = { |
Jan Kara | 32c3c0e | 2007-12-19 15:24:52 +0100 | [diff] [blame] | 2694 | .llseek = generic_file_llseek, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2695 | .read = generic_read_dir, |
| 2696 | .readdir = ocfs2_readdir, |
| 2697 | .fsync = ocfs2_sync_file, |
Mark Fasheh | 53fc622 | 2007-12-20 16:49:04 -0800 | [diff] [blame] | 2698 | .release = ocfs2_dir_release, |
| 2699 | .open = ocfs2_dir_open, |
Andi Kleen | c9ec148 | 2008-01-27 03:17:17 +0100 | [diff] [blame] | 2700 | .unlocked_ioctl = ocfs2_ioctl, |
Mark Fasheh | 586d232 | 2007-03-09 15:56:28 -0800 | [diff] [blame] | 2701 | #ifdef CONFIG_COMPAT |
| 2702 | .compat_ioctl = ocfs2_compat_ioctl, |
| 2703 | #endif |
Mark Fasheh | 53fc622 | 2007-12-20 16:49:04 -0800 | [diff] [blame] | 2704 | .flock = ocfs2_flock, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2705 | }; |