Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
new file mode 100644
index 0000000..d73b0aa
--- /dev/null
+++ b/fs/cifs/inode.c
@@ -0,0 +1,1096 @@
+/*
+ * fs/cifs/inode.c
+ *
+ * Copyright (C) International Business Machines Corp., 2002,2005
+ * Author(s): Steve French (sfrench@us.ibm.com)
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published
+ * by the Free Software Foundation; either version 2.1 of the License, or
+ * (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
+ * the GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#include <linux/fs.h>
+#include <linux/buffer_head.h>
+#include <linux/stat.h>
+#include <linux/pagemap.h>
+#include <asm/div64.h>
+#include "cifsfs.h"
+#include "cifspdu.h"
+#include "cifsglob.h"
+#include "cifsproto.h"
+#include "cifs_debug.h"
+#include "cifs_fs_sb.h"
+
+int cifs_get_inode_info_unix(struct inode **pinode,
+ const unsigned char *search_path, struct super_block *sb, int xid)
+{
+ int rc = 0;
+ FILE_UNIX_BASIC_INFO findData;
+ struct cifsTconInfo *pTcon;
+ struct inode *inode;
+ struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
+ char *tmp_path;
+
+ pTcon = cifs_sb->tcon;
+ cFYI(1, (" Getting info on %s ", search_path));
+ /* could have done a find first instead but this returns more info */
+ rc = CIFSSMBUnixQPathInfo(xid, pTcon, search_path, &findData,
+ cifs_sb->local_nls);
+/* dump_mem("\nUnixQPathInfo return data", &findData,
+ sizeof(findData)); */
+ if (rc) {
+ if (rc == -EREMOTE) {
+ tmp_path =
+ kmalloc(strnlen(pTcon->treeName,
+ MAX_TREE_SIZE + 1) +
+ strnlen(search_path, MAX_PATHCONF) + 1,
+ GFP_KERNEL);
+ if (tmp_path == NULL) {
+ return -ENOMEM;
+ }
+ /* have to skip first of the double backslash of
+ UNC name */
+ strncpy(tmp_path, pTcon->treeName, MAX_TREE_SIZE);
+ strncat(tmp_path, search_path, MAX_PATHCONF);
+ rc = connect_to_dfs_path(xid, pTcon->ses,
+ /* treename + */ tmp_path,
+ cifs_sb->local_nls);
+ kfree(tmp_path);
+
+ /* BB fix up inode etc. */
+ } else if (rc) {
+ return rc;
+ }
+ } else {
+ struct cifsInodeInfo *cifsInfo;
+ __u32 type = le32_to_cpu(findData.Type);
+ __u64 num_of_bytes = le64_to_cpu(findData.NumOfBytes);
+ __u64 end_of_file = le64_to_cpu(findData.EndOfFile);
+
+ /* get new inode */
+ if (*pinode == NULL) {
+ *pinode = new_inode(sb);
+ if(*pinode == NULL)
+ return -ENOMEM;
+ /* Is an i_ino of zero legal? */
+ /* Are there sanity checks we can use to ensure that
+ the server is really filling in that field? */
+ if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
+ (*pinode)->i_ino =
+ (unsigned long)findData.UniqueId;
+ } /* note ino incremented to unique num in new_inode */
+ insert_inode_hash(*pinode);
+ }
+
+ inode = *pinode;
+ cifsInfo = CIFS_I(inode);
+
+ cFYI(1, (" Old time %ld ", cifsInfo->time));
+ cifsInfo->time = jiffies;
+ cFYI(1, (" New time %ld ", cifsInfo->time));
+ /* this is ok to set on every inode revalidate */
+ atomic_set(&cifsInfo->inUse,1);
+
+ inode->i_atime =
+ cifs_NTtimeToUnix(le64_to_cpu(findData.LastAccessTime));
+ inode->i_mtime =
+ cifs_NTtimeToUnix(le64_to_cpu
+ (findData.LastModificationTime));
+ inode->i_ctime =
+ cifs_NTtimeToUnix(le64_to_cpu(findData.LastStatusChange));
+ inode->i_mode = le64_to_cpu(findData.Permissions);
+ if (type == UNIX_FILE) {
+ inode->i_mode |= S_IFREG;
+ } else if (type == UNIX_SYMLINK) {
+ inode->i_mode |= S_IFLNK;
+ } else if (type == UNIX_DIR) {
+ inode->i_mode |= S_IFDIR;
+ } else if (type == UNIX_CHARDEV) {
+ inode->i_mode |= S_IFCHR;
+ inode->i_rdev = MKDEV(le64_to_cpu(findData.DevMajor),
+ le64_to_cpu(findData.DevMinor) & MINORMASK);
+ } else if (type == UNIX_BLOCKDEV) {
+ inode->i_mode |= S_IFBLK;
+ inode->i_rdev = MKDEV(le64_to_cpu(findData.DevMajor),
+ le64_to_cpu(findData.DevMinor) & MINORMASK);
+ } else if (type == UNIX_FIFO) {
+ inode->i_mode |= S_IFIFO;
+ } else if (type == UNIX_SOCKET) {
+ inode->i_mode |= S_IFSOCK;
+ }
+ inode->i_uid = le64_to_cpu(findData.Uid);
+ inode->i_gid = le64_to_cpu(findData.Gid);
+ inode->i_nlink = le64_to_cpu(findData.Nlinks);
+
+ if(is_size_safe_to_change(cifsInfo)) {
+ /* can not safely change the file size here if the
+ client is writing to it due to potential races */
+
+ i_size_write(inode, end_of_file);
+
+ /* blksize needs to be multiple of two. So safer to default to
+ blksize and blkbits set in superblock so 2**blkbits and blksize
+ will match rather than setting to:
+ (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
+
+ /* This seems incredibly stupid but it turns out that i_blocks
+ is not related to (i_size / i_blksize), instead 512 byte size
+ is required for calculating num blocks */
+
+ /* 512 bytes (2**9) is the fake blocksize that must be used */
+ /* for this calculation */
+ inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
+ }
+
+ if (num_of_bytes < end_of_file)
+ cFYI(1, ("allocation size less than end of file "));
+ cFYI(1,
+ ("Size %ld and blocks %ld",
+ (unsigned long) inode->i_size, inode->i_blocks));
+ if (S_ISREG(inode->i_mode)) {
+ cFYI(1, (" File inode "));
+ inode->i_op = &cifs_file_inode_ops;
+ if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
+ inode->i_fop = &cifs_file_direct_ops;
+ else
+ inode->i_fop = &cifs_file_ops;
+ inode->i_data.a_ops = &cifs_addr_ops;
+ } else if (S_ISDIR(inode->i_mode)) {
+ cFYI(1, (" Directory inode"));
+ inode->i_op = &cifs_dir_inode_ops;
+ inode->i_fop = &cifs_dir_ops;
+ } else if (S_ISLNK(inode->i_mode)) {
+ cFYI(1, (" Symbolic Link inode "));
+ inode->i_op = &cifs_symlink_inode_ops;
+ /* tmp_inode->i_fop = */ /* do not need to set to anything */
+ } else {
+ cFYI(1, (" Init special inode "));
+ init_special_inode(inode, inode->i_mode,
+ inode->i_rdev);
+ }
+ }
+ return rc;
+}
+
+int cifs_get_inode_info(struct inode **pinode,
+ const unsigned char *search_path, FILE_ALL_INFO *pfindData,
+ struct super_block *sb, int xid)
+{
+ int rc = 0;
+ struct cifsTconInfo *pTcon;
+ struct inode *inode;
+ struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
+ char *tmp_path;
+ char *buf = NULL;
+
+ pTcon = cifs_sb->tcon;
+ cFYI(1,("Getting info on %s ", search_path));
+
+ if((pfindData == NULL) && (*pinode != NULL)) {
+ if(CIFS_I(*pinode)->clientCanCacheRead) {
+ cFYI(1,("No need to revalidate cached inode sizes"));
+ return rc;
+ }
+ }
+
+ /* if file info not passed in then get it from server */
+ if(pfindData == NULL) {
+ buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
+ if(buf == NULL)
+ return -ENOMEM;
+ pfindData = (FILE_ALL_INFO *)buf;
+ /* could do find first instead but this returns more info */
+ rc = CIFSSMBQPathInfo(xid, pTcon, search_path, pfindData,
+ cifs_sb->local_nls);
+ }
+ /* dump_mem("\nQPathInfo return data",&findData, sizeof(findData)); */
+ if (rc) {
+ if (rc == -EREMOTE) {
+ tmp_path =
+ kmalloc(strnlen
+ (pTcon->treeName,
+ MAX_TREE_SIZE + 1) +
+ strnlen(search_path, MAX_PATHCONF) + 1,
+ GFP_KERNEL);
+ if (tmp_path == NULL) {
+ kfree(buf);
+ return -ENOMEM;
+ }
+
+ strncpy(tmp_path, pTcon->treeName, MAX_TREE_SIZE);
+ strncat(tmp_path, search_path, MAX_PATHCONF);
+ rc = connect_to_dfs_path(xid, pTcon->ses,
+ /* treename + */ tmp_path,
+ cifs_sb->local_nls);
+ kfree(tmp_path);
+ /* BB fix up inode etc. */
+ } else if (rc) {
+ kfree(buf);
+ return rc;
+ }
+ } else {
+ struct cifsInodeInfo *cifsInfo;
+ __u32 attr = le32_to_cpu(pfindData->Attributes);
+
+ /* get new inode */
+ if (*pinode == NULL) {
+ *pinode = new_inode(sb);
+ if (*pinode == NULL)
+ return -ENOMEM;
+ /* Is an i_ino of zero legal? Can we use that to check
+ if the server supports returning inode numbers? Are
+ there other sanity checks we can use to ensure that
+ the server is really filling in that field? */
+
+ /* We can not use the IndexNumber field by default from
+ Windows or Samba (in ALL_INFO buf) but we can request
+ it explicitly. It may not be unique presumably if
+ the server has multiple devices mounted under one
+ share */
+
+ /* There may be higher info levels that work but are
+ there Windows server or network appliances for which
+ IndexNumber field is not guaranteed unique? */
+
+#ifdef CONFIG_CIFS_EXPERIMENTAL
+ if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM){
+ int rc1 = 0;
+ __u64 inode_num;
+
+ rc1 = CIFSGetSrvInodeNumber(xid, pTcon,
+ search_path, &inode_num,
+ cifs_sb->local_nls);
+ if(rc1) {
+ cFYI(1,("GetSrvInodeNum rc %d", rc1));
+ /* BB EOPNOSUPP disable SERVER_INUM? */
+ } else /* do we need cast or hash to ino? */
+ (*pinode)->i_ino = inode_num;
+ } /* else ino incremented to unique num in new_inode*/
+#endif /* CIFS_EXPERIMENTAL */
+ insert_inode_hash(*pinode);
+ }
+ inode = *pinode;
+ cifsInfo = CIFS_I(inode);
+ cifsInfo->cifsAttrs = attr;
+ cFYI(1, (" Old time %ld ", cifsInfo->time));
+ cifsInfo->time = jiffies;
+ cFYI(1, (" New time %ld ", cifsInfo->time));
+
+ /* blksize needs to be multiple of two. So safer to default to
+ blksize and blkbits set in superblock so 2**blkbits and blksize
+ will match rather than setting to:
+ (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
+
+ /* Linux can not store file creation time unfortunately so we ignore it */
+ inode->i_atime =
+ cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime));
+ inode->i_mtime =
+ cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
+ inode->i_ctime =
+ cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
+ cFYI(0, (" Attributes came in as 0x%x ", attr));
+
+ /* set default mode. will override for dirs below */
+ if (atomic_read(&cifsInfo->inUse) == 0)
+ /* new inode, can safely set these fields */
+ inode->i_mode = cifs_sb->mnt_file_mode;
+
+/* if (attr & ATTR_REPARSE) */
+ /* We no longer handle these as symlinks because we could not
+ follow them due to the absolute path with drive letter */
+ if (attr & ATTR_DIRECTORY) {
+ /* override default perms since we do not do byte range locking
+ on dirs */
+ inode->i_mode = cifs_sb->mnt_dir_mode;
+ inode->i_mode |= S_IFDIR;
+ } else {
+ inode->i_mode |= S_IFREG;
+ /* treat the dos attribute of read-only as read-only
+ mode e.g. 555 */
+ if (cifsInfo->cifsAttrs & ATTR_READONLY)
+ inode->i_mode &= ~(S_IWUGO);
+ /* BB add code here -
+ validate if device or weird share or device type? */
+ }
+ if (is_size_safe_to_change(cifsInfo)) {
+ /* can not safely change the file size here if the
+ client is writing to it due to potential races */
+ i_size_write(inode,le64_to_cpu(pfindData->EndOfFile));
+
+ /* 512 bytes (2**9) is the fake blocksize that must be
+ used for this calculation */
+ inode->i_blocks = (512 - 1 + le64_to_cpu(
+ pfindData->AllocationSize)) >> 9;
+ }
+
+ inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks);
+
+ /* BB fill in uid and gid here? with help from winbind?
+ or retrieve from NTFS stream extended attribute */
+ if (atomic_read(&cifsInfo->inUse) == 0) {
+ inode->i_uid = cifs_sb->mnt_uid;
+ inode->i_gid = cifs_sb->mnt_gid;
+ /* set so we do not keep refreshing these fields with
+ bad data after user has changed them in memory */
+ atomic_set(&cifsInfo->inUse,1);
+ }
+
+ if (S_ISREG(inode->i_mode)) {
+ cFYI(1, (" File inode "));
+ inode->i_op = &cifs_file_inode_ops;
+ if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
+ inode->i_fop = &cifs_file_direct_ops;
+ else
+ inode->i_fop = &cifs_file_ops;
+ inode->i_data.a_ops = &cifs_addr_ops;
+ } else if (S_ISDIR(inode->i_mode)) {
+ cFYI(1, (" Directory inode "));
+ inode->i_op = &cifs_dir_inode_ops;
+ inode->i_fop = &cifs_dir_ops;
+ } else if (S_ISLNK(inode->i_mode)) {
+ cFYI(1, (" Symbolic Link inode "));
+ inode->i_op = &cifs_symlink_inode_ops;
+ } else {
+ init_special_inode(inode, inode->i_mode,
+ inode->i_rdev);
+ }
+ }
+ kfree(buf);
+ return rc;
+}
+
+/* gets root inode */
+void cifs_read_inode(struct inode *inode)
+{
+ int xid;
+ struct cifs_sb_info *cifs_sb;
+
+ cifs_sb = CIFS_SB(inode->i_sb);
+ xid = GetXid();
+ if (cifs_sb->tcon->ses->capabilities & CAP_UNIX)
+ cifs_get_inode_info_unix(&inode, "", inode->i_sb,xid);
+ else
+ cifs_get_inode_info(&inode, "", NULL, inode->i_sb,xid);
+ /* can not call macro FreeXid here since in a void func */
+ _FreeXid(xid);
+}
+
+int cifs_unlink(struct inode *inode, struct dentry *direntry)
+{
+ int rc = 0;
+ int xid;
+ struct cifs_sb_info *cifs_sb;
+ struct cifsTconInfo *pTcon;
+ char *full_path = NULL;
+ struct cifsInodeInfo *cifsInode;
+ FILE_BASIC_INFO *pinfo_buf;
+
+ cFYI(1, (" cifs_unlink, inode = 0x%p with ", inode));
+
+ xid = GetXid();
+
+ cifs_sb = CIFS_SB(inode->i_sb);
+ pTcon = cifs_sb->tcon;
+
+ /* Unlink can be called from rename so we can not grab the sem here
+ since we deadlock otherwise */
+/* down(&direntry->d_sb->s_vfs_rename_sem);*/
+ full_path = build_path_from_dentry(direntry);
+/* up(&direntry->d_sb->s_vfs_rename_sem);*/
+ if (full_path == NULL) {
+ FreeXid(xid);
+ return -ENOMEM;
+ }
+ rc = CIFSSMBDelFile(xid, pTcon, full_path, cifs_sb->local_nls);
+
+ if (!rc) {
+ direntry->d_inode->i_nlink--;
+ } else if (rc == -ENOENT) {
+ d_drop(direntry);
+ } else if (rc == -ETXTBSY) {
+ int oplock = FALSE;
+ __u16 netfid;
+
+ rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, DELETE,
+ CREATE_NOT_DIR | CREATE_DELETE_ON_CLOSE,
+ &netfid, &oplock, NULL, cifs_sb->local_nls);
+ if (rc==0) {
+ CIFSSMBRenameOpenFile(xid, pTcon, netfid, NULL,
+ cifs_sb->local_nls);
+ CIFSSMBClose(xid, pTcon, netfid);
+ direntry->d_inode->i_nlink--;
+ }
+ } else if (rc == -EACCES) {
+ /* try only if r/o attribute set in local lookup data? */
+ pinfo_buf = kmalloc(sizeof(FILE_BASIC_INFO), GFP_KERNEL);
+ if (pinfo_buf) {
+ memset(pinfo_buf, 0, sizeof(FILE_BASIC_INFO));
+ /* ATTRS set to normal clears r/o bit */
+ pinfo_buf->Attributes = cpu_to_le32(ATTR_NORMAL);
+ if (!(pTcon->ses->flags & CIFS_SES_NT4))
+ rc = CIFSSMBSetTimes(xid, pTcon, full_path,
+ pinfo_buf,
+ cifs_sb->local_nls);
+ else
+ rc = -EOPNOTSUPP;
+
+ if (rc == -EOPNOTSUPP) {
+ int oplock = FALSE;
+ __u16 netfid;
+ /* rc = CIFSSMBSetAttrLegacy(xid, pTcon,
+ full_path,
+ (__u16)ATTR_NORMAL,
+ cifs_sb->local_nls);
+ For some strange reason it seems that NT4 eats the
+ old setattr call without actually setting the
+ attributes so on to the third attempted workaround
+ */
+
+ /* BB could scan to see if we already have it open
+ and pass in pid of opener to function */
+ rc = CIFSSMBOpen(xid, pTcon, full_path,
+ FILE_OPEN, SYNCHRONIZE |
+ FILE_WRITE_ATTRIBUTES, 0,
+ &netfid, &oplock, NULL,
+ cifs_sb->local_nls);
+ if (rc==0) {
+ rc = CIFSSMBSetFileTimes(xid, pTcon,
+ pinfo_buf,
+ netfid);
+ CIFSSMBClose(xid, pTcon, netfid);
+ }
+ }
+ kfree(pinfo_buf);
+ }
+ if (rc==0) {
+ rc = CIFSSMBDelFile(xid, pTcon, full_path,
+ cifs_sb->local_nls);
+ if (!rc) {
+ direntry->d_inode->i_nlink--;
+ } else if (rc == -ETXTBSY) {
+ int oplock = FALSE;
+ __u16 netfid;
+
+ rc = CIFSSMBOpen(xid, pTcon, full_path,
+ FILE_OPEN, DELETE,
+ CREATE_NOT_DIR |
+ CREATE_DELETE_ON_CLOSE,
+ &netfid, &oplock, NULL,
+ cifs_sb->local_nls);
+ if (rc==0) {
+ CIFSSMBRenameOpenFile(xid, pTcon,
+ netfid, NULL,
+ cifs_sb->local_nls);
+ CIFSSMBClose(xid, pTcon, netfid);
+ direntry->d_inode->i_nlink--;
+ }
+ /* BB if rc = -ETXTBUSY goto the rename logic BB */
+ }
+ }
+ }
+ cifsInode = CIFS_I(direntry->d_inode);
+ cifsInode->time = 0; /* will force revalidate to get info when
+ needed */
+ direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
+ current_fs_time(inode->i_sb);
+ cifsInode = CIFS_I(inode);
+ cifsInode->time = 0; /* force revalidate of dir as well */
+
+ kfree(full_path);
+ FreeXid(xid);
+ return rc;
+}
+
+int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
+{
+ int rc = 0;
+ int xid;
+ struct cifs_sb_info *cifs_sb;
+ struct cifsTconInfo *pTcon;
+ char *full_path = NULL;
+ struct inode *newinode = NULL;
+
+ cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p ", mode, inode));
+
+ xid = GetXid();
+
+ cifs_sb = CIFS_SB(inode->i_sb);
+ pTcon = cifs_sb->tcon;
+
+ down(&inode->i_sb->s_vfs_rename_sem);
+ full_path = build_path_from_dentry(direntry);
+ up(&inode->i_sb->s_vfs_rename_sem);
+ if (full_path == NULL) {
+ FreeXid(xid);
+ return -ENOMEM;
+ }
+ /* BB add setting the equivalent of mode via CreateX w/ACLs */
+ rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls);
+ if (rc) {
+ cFYI(1, ("cifs_mkdir returned 0x%x ", rc));
+ d_drop(direntry);
+ } else {
+ inode->i_nlink++;
+ if (pTcon->ses->capabilities & CAP_UNIX)
+ rc = cifs_get_inode_info_unix(&newinode, full_path,
+ inode->i_sb,xid);
+ else
+ rc = cifs_get_inode_info(&newinode, full_path, NULL,
+ inode->i_sb,xid);
+
+ direntry->d_op = &cifs_dentry_ops;
+ d_instantiate(direntry, newinode);
+ if (direntry->d_inode)
+ direntry->d_inode->i_nlink = 2;
+ if (cifs_sb->tcon->ses->capabilities & CAP_UNIX)
+ if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
+ CIFSSMBUnixSetPerms(xid, pTcon, full_path,
+ mode,
+ (__u64)current->euid,
+ (__u64)current->egid,
+ 0 /* dev_t */,
+ cifs_sb->local_nls);
+ } else {
+ CIFSSMBUnixSetPerms(xid, pTcon, full_path,
+ mode, (__u64)-1,
+ (__u64)-1, 0 /* dev_t */,
+ cifs_sb->local_nls);
+ }
+ else {
+ /* BB to be implemented via Windows secrty descriptors
+ eg CIFSSMBWinSetPerms(xid, pTcon, full_path, mode,
+ -1, -1, local_nls); */
+ }
+ }
+ kfree(full_path);
+ FreeXid(xid);
+ return rc;
+}
+
+int cifs_rmdir(struct inode *inode, struct dentry *direntry)
+{
+ int rc = 0;
+ int xid;
+ struct cifs_sb_info *cifs_sb;
+ struct cifsTconInfo *pTcon;
+ char *full_path = NULL;
+ struct cifsInodeInfo *cifsInode;
+
+ cFYI(1, (" cifs_rmdir, inode = 0x%p with ", inode));
+
+ xid = GetXid();
+
+ cifs_sb = CIFS_SB(inode->i_sb);
+ pTcon = cifs_sb->tcon;
+
+ down(&inode->i_sb->s_vfs_rename_sem);
+ full_path = build_path_from_dentry(direntry);
+ up(&inode->i_sb->s_vfs_rename_sem);
+ if (full_path == NULL) {
+ FreeXid(xid);
+ return -ENOMEM;
+ }
+
+ rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls);
+
+ if (!rc) {
+ inode->i_nlink--;
+ i_size_write(direntry->d_inode,0);
+ direntry->d_inode->i_nlink = 0;
+ }
+
+ cifsInode = CIFS_I(direntry->d_inode);
+ cifsInode->time = 0; /* force revalidate to go get info when
+ needed */
+ direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
+ current_fs_time(inode->i_sb);
+
+ kfree(full_path);
+ FreeXid(xid);
+ return rc;
+}
+
+int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
+ struct inode *target_inode, struct dentry *target_direntry)
+{
+ char *fromName;
+ char *toName;
+ struct cifs_sb_info *cifs_sb_source;
+ struct cifs_sb_info *cifs_sb_target;
+ struct cifsTconInfo *pTcon;
+ int xid;
+ int rc = 0;
+
+ xid = GetXid();
+
+ cifs_sb_target = CIFS_SB(target_inode->i_sb);
+ cifs_sb_source = CIFS_SB(source_inode->i_sb);
+ pTcon = cifs_sb_source->tcon;
+
+ if (pTcon != cifs_sb_target->tcon) {
+ FreeXid(xid);
+ return -EXDEV; /* BB actually could be allowed if same server,
+ but different share.
+ Might eventually add support for this */
+ }
+
+ /* we already have the rename sem so we do not need to grab it again
+ here to protect the path integrity */
+ fromName = build_path_from_dentry(source_direntry);
+ toName = build_path_from_dentry(target_direntry);
+ if ((fromName == NULL) || (toName == NULL)) {
+ rc = -ENOMEM;
+ goto cifs_rename_exit;
+ }
+
+ rc = CIFSSMBRename(xid, pTcon, fromName, toName,
+ cifs_sb_source->local_nls);
+ if (rc == -EEXIST) {
+ /* check if they are the same file because rename of hardlinked
+ files is a noop */
+ FILE_UNIX_BASIC_INFO *info_buf_source;
+ FILE_UNIX_BASIC_INFO *info_buf_target;
+
+ info_buf_source =
+ kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
+ if (info_buf_source != NULL) {
+ info_buf_target = info_buf_source + 1;
+ rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
+ info_buf_source, cifs_sb_source->local_nls);
+ if (rc == 0) {
+ rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName,
+ info_buf_target,
+ cifs_sb_target->local_nls);
+ }
+ if ((rc == 0) &&
+ (info_buf_source->UniqueId ==
+ info_buf_target->UniqueId)) {
+ /* do not rename since the files are hardlinked which
+ is a noop */
+ } else {
+ /* we either can not tell the files are hardlinked
+ (as with Windows servers) or files are not
+ hardlinked so delete the target manually before
+ renaming to follow POSIX rather than Windows
+ semantics */
+ cifs_unlink(target_inode, target_direntry);
+ rc = CIFSSMBRename(xid, pTcon, fromName,
+ toName,
+ cifs_sb_source->local_nls);
+ }
+ kfree(info_buf_source);
+ } /* if we can not get memory just leave rc as EEXIST */
+ }
+
+ if (rc) {
+ cFYI(1, ("rename rc %d", rc));
+ }
+
+ if ((rc == -EIO) || (rc == -EEXIST)) {
+ int oplock = FALSE;
+ __u16 netfid;
+
+ /* BB FIXME Is Generic Read correct for rename? */
+ /* if renaming directory - we should not say CREATE_NOT_DIR,
+ need to test renaming open directory, also GENERIC_READ
+ might not right be right access to request */
+ rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ,
+ CREATE_NOT_DIR, &netfid, &oplock, NULL,
+ cifs_sb_source->local_nls);
+ if (rc==0) {
+ CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName,
+ cifs_sb_source->local_nls);
+ CIFSSMBClose(xid, pTcon, netfid);
+ }
+ }
+
+cifs_rename_exit:
+ kfree(fromName);
+ kfree(toName);
+ FreeXid(xid);
+ return rc;
+}
+
+int cifs_revalidate(struct dentry *direntry)
+{
+ int xid;
+ int rc = 0;
+ char *full_path;
+ struct cifs_sb_info *cifs_sb;
+ struct cifsInodeInfo *cifsInode;
+ loff_t local_size;
+ struct timespec local_mtime;
+ int invalidate_inode = FALSE;
+
+ if (direntry->d_inode == NULL)
+ return -ENOENT;
+
+ cifsInode = CIFS_I(direntry->d_inode);
+
+ if (cifsInode == NULL)
+ return -ENOENT;
+
+ /* no sense revalidating inode info on file that no one can write */
+ if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
+ return rc;
+
+ xid = GetXid();
+
+ cifs_sb = CIFS_SB(direntry->d_sb);
+
+ /* can not safely grab the rename sem here if rename calls revalidate
+ since that would deadlock */
+ full_path = build_path_from_dentry(direntry);
+ if (full_path == NULL) {
+ FreeXid(xid);
+ return -ENOMEM;
+ }
+ cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
+ "jiffies %ld", full_path, direntry->d_inode,
+ direntry->d_inode->i_count.counter, direntry,
+ direntry->d_time, jiffies));
+
+ if (cifsInode->time == 0) {
+ /* was set to zero previously to force revalidate */
+ } else if (time_before(jiffies, cifsInode->time + HZ) &&
+ lookupCacheEnabled) {
+ if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
+ (direntry->d_inode->i_nlink == 1)) {
+ kfree(full_path);
+ FreeXid(xid);
+ return rc;
+ } else {
+ cFYI(1, ("Have to revalidate file due to hardlinks"));
+ }
+ }
+
+ /* save mtime and size */
+ local_mtime = direntry->d_inode->i_mtime;
+ local_size = direntry->d_inode->i_size;
+
+ if (cifs_sb->tcon->ses->capabilities & CAP_UNIX) {
+ rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
+ direntry->d_sb,xid);
+ if (rc) {
+ cFYI(1, ("error on getting revalidate info %d", rc));
+/* if (rc != -ENOENT)
+ rc = 0; */ /* BB should we cache info on
+ certain errors? */
+ }
+ } else {
+ rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
+ direntry->d_sb,xid);
+ if (rc) {
+ cFYI(1, ("error on getting revalidate info %d", rc));
+/* if (rc != -ENOENT)
+ rc = 0; */ /* BB should we cache info on
+ certain errors? */
+ }
+ }
+ /* should we remap certain errors, access denied?, to zero */
+
+ /* if not oplocked, we invalidate inode pages if mtime or file size
+ had changed on server */
+
+ if (timespec_equal(&local_mtime,&direntry->d_inode->i_mtime) &&
+ (local_size == direntry->d_inode->i_size)) {
+ cFYI(1, ("cifs_revalidate - inode unchanged"));
+ } else {
+ /* file may have changed on server */
+ if (cifsInode->clientCanCacheRead) {
+ /* no need to invalidate inode pages since we were the
+ only ones who could have modified the file and the
+ server copy is staler than ours */
+ } else {
+ invalidate_inode = TRUE;
+ }
+ }
+
+ /* can not grab this sem since kernel filesys locking documentation
+ indicates i_sem may be taken by the kernel on lookup and rename
+ which could deadlock if we grab the i_sem here as well */
+/* down(&direntry->d_inode->i_sem);*/
+ /* need to write out dirty pages here */
+ if (direntry->d_inode->i_mapping) {
+ /* do we need to lock inode until after invalidate completes
+ below? */
+ filemap_fdatawrite(direntry->d_inode->i_mapping);
+ }
+ if (invalidate_inode) {
+ if (direntry->d_inode->i_mapping)
+ filemap_fdatawait(direntry->d_inode->i_mapping);
+ /* may eventually have to do this for open files too */
+ if (list_empty(&(cifsInode->openFileList))) {
+ /* Has changed on server - flush read ahead pages */
+ cFYI(1, ("Invalidating read ahead data on "
+ "closed file"));
+ invalidate_remote_inode(direntry->d_inode);
+ }
+ }
+/* up(&direntry->d_inode->i_sem); */
+
+ kfree(full_path);
+ FreeXid(xid);
+ return rc;
+}
+
+int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
+ struct kstat *stat)
+{
+ int err = cifs_revalidate(dentry);
+ if (!err)
+ generic_fillattr(dentry->d_inode, stat);
+ return err;
+}
+
+static int cifs_truncate_page(struct address_space *mapping, loff_t from)
+{
+ pgoff_t index = from >> PAGE_CACHE_SHIFT;
+ unsigned offset = from & (PAGE_CACHE_SIZE - 1);
+ struct page *page;
+ char *kaddr;
+ int rc = 0;
+
+ page = grab_cache_page(mapping, index);
+ if (!page)
+ return -ENOMEM;
+
+ kaddr = kmap_atomic(page, KM_USER0);
+ memset(kaddr + offset, 0, PAGE_CACHE_SIZE - offset);
+ flush_dcache_page(page);
+ kunmap_atomic(kaddr, KM_USER0);
+ unlock_page(page);
+ page_cache_release(page);
+ return rc;
+}
+
+int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
+{
+ int xid;
+ struct cifs_sb_info *cifs_sb;
+ struct cifsTconInfo *pTcon;
+ char *full_path = NULL;
+ int rc = -EACCES;
+ int found = FALSE;
+ struct cifsFileInfo *open_file = NULL;
+ FILE_BASIC_INFO time_buf;
+ int set_time = FALSE;
+ __u64 mode = 0xFFFFFFFFFFFFFFFFULL;
+ __u64 uid = 0xFFFFFFFFFFFFFFFFULL;
+ __u64 gid = 0xFFFFFFFFFFFFFFFFULL;
+ struct cifsInodeInfo *cifsInode;
+ struct list_head *tmp;
+
+ xid = GetXid();
+
+ cFYI(1, (" In cifs_setattr, name = %s attrs->iavalid 0x%x ",
+ direntry->d_name.name, attrs->ia_valid));
+ cifs_sb = CIFS_SB(direntry->d_inode->i_sb);
+ pTcon = cifs_sb->tcon;
+
+ down(&direntry->d_sb->s_vfs_rename_sem);
+ full_path = build_path_from_dentry(direntry);
+ up(&direntry->d_sb->s_vfs_rename_sem);
+ if (full_path == NULL) {
+ FreeXid(xid);
+ return -ENOMEM;
+ }
+ cifsInode = CIFS_I(direntry->d_inode);
+
+ /* BB check if we need to refresh inode from server now ? BB */
+
+ /* need to flush data before changing file size on server */
+ filemap_fdatawrite(direntry->d_inode->i_mapping);
+ filemap_fdatawait(direntry->d_inode->i_mapping);
+
+ if (attrs->ia_valid & ATTR_SIZE) {
+ read_lock(&GlobalSMBSeslock);
+ /* To avoid spurious oplock breaks from server, in the case of
+ inodes that we already have open, avoid doing path based
+ setting of file size if we can do it by handle.
+ This keeps our caching token (oplock) and avoids timeouts
+ when the local oplock break takes longer to flush
+ writebehind data than the SMB timeout for the SetPathInfo
+ request would allow */
+ list_for_each(tmp, &cifsInode->openFileList) {
+ open_file = list_entry(tmp, struct cifsFileInfo,
+ flist);
+ /* We check if file is open for writing first */
+ if ((open_file->pfile) &&
+ ((open_file->pfile->f_flags & O_RDWR) ||
+ (open_file->pfile->f_flags & O_WRONLY))) {
+ if (open_file->invalidHandle == FALSE) {
+ /* we found a valid, writeable network
+ file handle to use to try to set the
+ file size */
+ __u16 nfid = open_file->netfid;
+ __u32 npid = open_file->pid;
+ read_unlock(&GlobalSMBSeslock);
+ found = TRUE;
+ rc = CIFSSMBSetFileSize(xid, pTcon,
+ attrs->ia_size, nfid, npid,
+ FALSE);
+ cFYI(1, ("SetFileSize by handle "
+ "(setattrs) rc = %d", rc));
+ /* Do not need reopen and retry on
+ EAGAIN since we will retry by
+ pathname below */
+
+ /* now that we found one valid file
+ handle no sense continuing to loop
+ trying others, so break here */
+ break;
+ }
+ }
+ }
+ if (found == FALSE)
+ read_unlock(&GlobalSMBSeslock);
+
+ if (rc != 0) {
+ /* Set file size by pathname rather than by handle
+ either because no valid, writeable file handle for
+ it was found or because there was an error setting
+ it by handle */
+ rc = CIFSSMBSetEOF(xid, pTcon, full_path,
+ attrs->ia_size, FALSE,
+ cifs_sb->local_nls);
+ cFYI(1, (" SetEOF by path (setattrs) rc = %d", rc));
+ }
+
+ /* Server is ok setting allocation size implicitly - no need
+ to call:
+ CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, TRUE,
+ cifs_sb->local_nls);
+ */
+
+ if (rc == 0) {
+ rc = vmtruncate(direntry->d_inode, attrs->ia_size);
+ cifs_truncate_page(direntry->d_inode->i_mapping,
+ direntry->d_inode->i_size);
+ }
+ }
+ if (attrs->ia_valid & ATTR_UID) {
+ cFYI(1, (" CIFS - UID changed to %d", attrs->ia_uid));
+ uid = attrs->ia_uid;
+ /* entry->uid = cpu_to_le16(attr->ia_uid); */
+ }
+ if (attrs->ia_valid & ATTR_GID) {
+ cFYI(1, (" CIFS - GID changed to %d", attrs->ia_gid));
+ gid = attrs->ia_gid;
+ /* entry->gid = cpu_to_le16(attr->ia_gid); */
+ }
+
+ time_buf.Attributes = 0;
+ if (attrs->ia_valid & ATTR_MODE) {
+ cFYI(1, (" CIFS - Mode changed to 0x%x", attrs->ia_mode));
+ mode = attrs->ia_mode;
+ /* entry->mode = cpu_to_le16(attr->ia_mode); */
+ }
+
+ if ((cifs_sb->tcon->ses->capabilities & CAP_UNIX)
+ && (attrs->ia_valid & (ATTR_MODE | ATTR_GID | ATTR_UID)))
+ rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, uid, gid,
+ 0 /* dev_t */, cifs_sb->local_nls);
+ else if (attrs->ia_valid & ATTR_MODE) {
+ if ((mode & S_IWUGO) == 0) /* not writeable */ {
+ if ((cifsInode->cifsAttrs & ATTR_READONLY) == 0)
+ time_buf.Attributes =
+ cpu_to_le32(cifsInode->cifsAttrs |
+ ATTR_READONLY);
+ } else if ((mode & S_IWUGO) == S_IWUGO) {
+ if (cifsInode->cifsAttrs & ATTR_READONLY)
+ time_buf.Attributes =
+ cpu_to_le32(cifsInode->cifsAttrs &
+ (~ATTR_READONLY));
+ }
+ /* BB to be implemented -
+ via Windows security descriptors or streams */
+ /* CIFSSMBWinSetPerms(xid, pTcon, full_path, mode, uid, gid,
+ cifs_sb->local_nls); */
+ }
+
+ if (attrs->ia_valid & ATTR_ATIME) {
+ set_time = TRUE;
+ time_buf.LastAccessTime =
+ cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
+ } else
+ time_buf.LastAccessTime = 0;
+
+ if (attrs->ia_valid & ATTR_MTIME) {
+ set_time = TRUE;
+ time_buf.LastWriteTime =
+ cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
+ } else
+ time_buf.LastWriteTime = 0;
+
+ if (attrs->ia_valid & ATTR_CTIME) {
+ set_time = TRUE;
+ cFYI(1, (" CIFS - CTIME changed ")); /* BB probably no need */
+ time_buf.ChangeTime =
+ cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
+ } else
+ time_buf.ChangeTime = 0;
+
+ if (set_time || time_buf.Attributes) {
+ /* BB what if setting one attribute fails (such as size) but
+ time setting works? */
+ time_buf.CreationTime = 0; /* do not change */
+ /* In the future we should experiment - try setting timestamps
+ via Handle (SetFileInfo) instead of by path */
+ if (!(pTcon->ses->flags & CIFS_SES_NT4))
+ rc = CIFSSMBSetTimes(xid, pTcon, full_path, &time_buf,
+ cifs_sb->local_nls);
+ else
+ rc = -EOPNOTSUPP;
+
+ if (rc == -EOPNOTSUPP) {
+ int oplock = FALSE;
+ __u16 netfid;
+
+ cFYI(1, ("calling SetFileInfo since SetPathInfo for "
+ "times not supported by this server"));
+ /* BB we could scan to see if we already have it open
+ and pass in pid of opener to function */
+ rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
+ SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
+ CREATE_NOT_DIR, &netfid, &oplock,
+ NULL, cifs_sb->local_nls);
+ if (rc==0) {
+ rc = CIFSSMBSetFileTimes(xid, pTcon, &time_buf,
+ netfid);
+ CIFSSMBClose(xid, pTcon, netfid);
+ } else {
+ /* BB For even older servers we could convert time_buf
+ into old DOS style which uses two second
+ granularity */
+
+ /* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path,
+ &time_buf, cifs_sb->local_nls); */
+ }
+ }
+ }
+
+ /* do not need local check to inode_check_ok since the server does
+ that */
+ if (!rc)
+ rc = inode_setattr(direntry->d_inode, attrs);
+ kfree(full_path);
+ FreeXid(xid);
+ return rc;
+}
+
+void cifs_delete_inode(struct inode *inode)
+{
+ cFYI(1, ("In cifs_delete_inode, inode = 0x%p ", inode));
+ /* may have to add back in if and when safe distributed caching of
+ directories added e.g. via FindNotify */
+}
