diff options
| -rw-r--r-- | fs/cifs/inode.c | 98 |
1 files changed, 59 insertions, 39 deletions
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c index 8dbc7c90309c..660aac81160a 100644 --- a/fs/cifs/inode.c +++ b/fs/cifs/inode.c @@ -760,6 +760,59 @@ out: return rc; } +/* + * open the given file (if it isn't already), set the DELETE_ON_CLOSE bit + * and rename it to a random name that hopefully won't conflict with + * anything else. + */ +static int +cifs_rename_pending_delete(char *full_path, struct inode *inode, int xid) +{ + int oplock = 0; + int rc; + __u16 netfid; + struct cifsInodeInfo *cifsInode = CIFS_I(inode); + struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); + struct cifsTconInfo *tcon = cifs_sb->tcon; + __u32 dosattr; + FILE_BASIC_INFO *info_buf; + + rc = CIFSSMBOpen(xid, tcon, full_path, FILE_OPEN, + DELETE|FILE_WRITE_ATTRIBUTES, + CREATE_NOT_DIR|CREATE_DELETE_ON_CLOSE, + &netfid, &oplock, NULL, cifs_sb->local_nls, + cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); + if (rc != 0) + goto out; + + /* set ATTR_HIDDEN and clear ATTR_READONLY */ + cifsInode = CIFS_I(inode); + dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY; + if (dosattr == 0) + dosattr |= ATTR_NORMAL; + dosattr |= ATTR_HIDDEN; + + info_buf = kzalloc(sizeof(*info_buf), GFP_KERNEL); + if (info_buf == NULL) { + rc = -ENOMEM; + goto out_close; + } + info_buf->Attributes = cpu_to_le32(dosattr); + rc = CIFSSMBSetFileInfo(xid, tcon, info_buf, netfid, current->tgid); + kfree(info_buf); + if (rc != 0) + goto out_close; + + /* silly-rename the file */ + rc = CIFSSMBRenameOpenFile(xid, tcon, netfid, NULL, cifs_sb->local_nls, + cifs_sb->mnt_cifs_flags & + CIFS_MOUNT_MAP_SPECIAL_CHR); +out_close: + CIFSSMBClose(xid, tcon, netfid); +out: + return rc; +} + int cifs_unlink(struct inode *dir, struct dentry *dentry) { int rc = 0; @@ -805,23 +858,9 @@ psx_del_no_retry: } else if (rc == -ENOENT) { d_drop(dentry); } else if (rc == -ETXTBSY) { - int oplock = 0; - __u16 netfid; - - rc = CIFSSMBOpen(xid, tcon, full_path, FILE_OPEN, DELETE, - CREATE_NOT_DIR | CREATE_DELETE_ON_CLOSE, - &netfid, &oplock, NULL, cifs_sb->local_nls, - cifs_sb->mnt_cifs_flags & - CIFS_MOUNT_MAP_SPECIAL_CHR); - if (rc == 0) { - CIFSSMBRenameOpenFile(xid, tcon, netfid, NULL, - cifs_sb->local_nls, - cifs_sb->mnt_cifs_flags & - CIFS_MOUNT_MAP_SPECIAL_CHR); - CIFSSMBClose(xid, tcon, netfid); - if (inode) - drop_nlink(inode); - } + rc = cifs_rename_pending_delete(full_path, inode, xid); + if (rc == 0) + drop_nlink(inode); } else if (rc == -EACCES) { /* try only if r/o attribute set in local lookup data? */ attrs = kzalloc(sizeof(*attrs), GFP_KERNEL); @@ -848,28 +887,9 @@ psx_del_no_retry: if (inode) drop_nlink(inode); } else if (rc == -ETXTBSY) { - int oplock = 0; - __u16 netfid; - - rc = CIFSSMBOpen(xid, tcon, full_path, - FILE_OPEN, DELETE, - CREATE_NOT_DIR | - CREATE_DELETE_ON_CLOSE, - &netfid, &oplock, NULL, - cifs_sb->local_nls, - cifs_sb->mnt_cifs_flags & - CIFS_MOUNT_MAP_SPECIAL_CHR); - if (rc == 0) { - CIFSSMBRenameOpenFile(xid, tcon, - netfid, NULL, - cifs_sb->local_nls, - cifs_sb->mnt_cifs_flags & - CIFS_MOUNT_MAP_SPECIAL_CHR); - CIFSSMBClose(xid, tcon, netfid); - if (inode) - drop_nlink(inode); - } - /* BB if rc = -ETXTBUSY goto the rename logic BB */ + rc = cifs_rename_pending_delete(full_path, inode, xid); + if (rc == 0) + drop_nlink(inode); } } out_reval: |