diff options
-rw-r--r-- | fs/cifs/inode.c | 186 |
1 files changed, 104 insertions, 82 deletions
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c index 954b670f168..82612be9477 100644 --- a/fs/cifs/inode.c +++ b/fs/cifs/inode.c @@ -806,8 +806,6 @@ cifs_rename_pending_delete(char *full_path, struct inode *inode, int xid) rc = CIFSSMBRenameOpenFile(xid, tcon, netfid, NULL, cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); - if (rc != 0) - goto out_close; /* set DELETE_ON_CLOSE */ rc = CIFSSMBSetFileDisposition(xid, tcon, true, netfid, current->tgid); @@ -1180,117 +1178,141 @@ int cifs_rmdir(struct inode *inode, struct dentry *direntry) return rc; } +static int +cifs_do_rename(int xid, struct dentry *from_dentry, const char *fromPath, + struct dentry *to_dentry, const char *toPath) +{ + struct cifs_sb_info *cifs_sb = CIFS_SB(from_dentry->d_sb); + struct cifsTconInfo *pTcon = cifs_sb->tcon; + __u16 srcfid; + int oplock, rc; + + /* try path-based rename first */ + rc = CIFSSMBRename(xid, pTcon, fromPath, toPath, cifs_sb->local_nls, + cifs_sb->mnt_cifs_flags & + CIFS_MOUNT_MAP_SPECIAL_CHR); + + /* + * don't bother with rename by filehandle unless file is busy and + * source Note that cross directory moves do not work with + * rename by filehandle to various Windows servers. + */ + if (rc == 0 || rc != -ETXTBSY) + return rc; + + /* open the file to be renamed -- we need DELETE perms */ + rc = CIFSSMBOpen(xid, pTcon, fromPath, FILE_OPEN, DELETE, + CREATE_NOT_DIR, &srcfid, &oplock, NULL, + cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & + CIFS_MOUNT_MAP_SPECIAL_CHR); + + if (rc == 0) { + rc = CIFSSMBRenameOpenFile(xid, pTcon, srcfid, + (const char *) to_dentry->d_name.name, + cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & + CIFS_MOUNT_MAP_SPECIAL_CHR); + + CIFSSMBClose(xid, pTcon, srcfid); + } + + 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; + char *fromName = NULL; + char *toName = NULL; struct cifs_sb_info *cifs_sb_source; struct cifs_sb_info *cifs_sb_target; struct cifsTconInfo *pTcon; + FILE_UNIX_BASIC_INFO *info_buf_source = NULL; + FILE_UNIX_BASIC_INFO *info_buf_target; int xid; - int rc = 0; - - xid = GetXid(); + int rc; cifs_sb_target = CIFS_SB(target_inode->i_sb); cifs_sb_source = CIFS_SB(source_inode->i_sb); pTcon = cifs_sb_source->tcon; + xid = GetXid(); + + /* + * BB: this might be allowed if same server, but different share. + * Consider adding support for this + */ 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 */ + rc = -EXDEV; + goto cifs_rename_exit; } - /* we already have the rename sem so we do not need to grab it again - here to protect the path integrity */ + /* + * 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); + if (fromName == NULL) { + rc = -ENOMEM; + goto cifs_rename_exit; + } + toName = build_path_from_dentry(target_direntry); - if ((fromName == NULL) || (toName == NULL)) { + if (toName == NULL) { rc = -ENOMEM; goto cifs_rename_exit; } - rc = CIFSSMBRename(xid, pTcon, fromName, toName, - cifs_sb_source->local_nls, - cifs_sb_source->mnt_cifs_flags & - CIFS_MOUNT_MAP_SPECIAL_CHR); + rc = cifs_do_rename(xid, source_direntry, fromName, + target_direntry, toName); + 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) { + if (pTcon->unix_ext) { + /* + * Are src and dst hardlinks of same inode? We can + * only tell with unix extensions enabled + */ + info_buf_source = + kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), + GFP_KERNEL); + if (info_buf_source != NULL) + goto unlink_target; + info_buf_target = info_buf_source + 1; - if (pTcon->unix_ext) - rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName, - info_buf_source, - cifs_sb_source->local_nls, - cifs_sb_source->mnt_cifs_flags & + rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName, + info_buf_source, + cifs_sb_source->local_nls, + cifs_sb_source->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); - /* else rc is still EEXIST so will fall through to - unlink the target and retry rename */ - if (rc == 0) { - rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName, - info_buf_target, + if (rc != 0) + goto unlink_target; + + rc = CIFSSMBUnixQPathInfo(xid, pTcon, + toName, info_buf_target, cifs_sb_target->local_nls, /* remap based on source sb */ cifs_sb_source->mnt_cifs_flags & - CIFS_MOUNT_MAP_SPECIAL_CHR); - } - 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, - cifs_sb_source->mnt_cifs_flags - & CIFS_MOUNT_MAP_SPECIAL_CHR); - } - 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 = 0; - __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, - cifs_sb_source->mnt_cifs_flags & - CIFS_MOUNT_MAP_SPECIAL_CHR); - if (rc == 0) { - rc = CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName, - cifs_sb_source->local_nls, - cifs_sb_source->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); - CIFSSMBClose(xid, pTcon, netfid); - } + + if (rc == 0 && (info_buf_source->UniqueId == + info_buf_target->UniqueId)) + /* same file, POSIX says that this is a noop */ + goto cifs_rename_exit; + } /* else ... BB we could add the same check for Windows by + checking the UniqueId via FILE_INTERNAL_INFO */ +unlink_target: + /* + * we either can not tell the files are hardlinked (as with + * Windows servers) or files are not hardlinked. Delete the + * target manually before renaming to follow POSIX rather than + * Windows semantics + */ + cifs_unlink(target_inode, target_direntry); + rc = cifs_do_rename(xid, source_direntry, fromName, + target_direntry, toName); } cifs_rename_exit: + kfree(info_buf_source); kfree(fromName); kfree(toName); FreeXid(xid); |