[PATCH 3.14 03/20] remove directory incorrectly tries to set delete on close on non-empty directories

[Greg Kroah-Hartman]

3.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Steve French <smfre...@gmail.com>

commit 897fba1172d637d344f009d700f7eb8a1fa262f1 upstream.

Wrong return code was being returned on SMB3 rmdir of
non-empty directory.

For SMB3 (unlike for cifs), we attempt to delete a directory by
set of delete on close flag on the open. Windows clients set
this flag via a set info (SET_FILE_DISPOSITION to set this flag)
which properly checks if the directory is empty.

With this patch on smb3 mounts we correctly return
 "DIRECTORY NOT EMPTY"
on attempts to remove a non-empty directory.

Signed-off-by: Steve French <steve.fre...@primarydata.com>
Acked-by: Sachin Prabhu <spra...@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>

---
 fs/cifs/smb2glob.h  |    1 +
 fs/cifs/smb2inode.c |    8 ++++++--
 fs/cifs/smb2pdu.c   |   16 ++++++++++++++++
 fs/cifs/smb2proto.h |    2 ++
 4 files changed, 25 insertions(+), 2 deletions(-)

--- a/fs/cifs/smb2glob.h
+++ b/fs/cifs/smb2glob.h
@@ -44,6 +44,7 @@
 #define SMB2_OP_DELETE 7
 #define SMB2_OP_HARDLINK 8
 #define SMB2_OP_SET_EOF 9
+#define SMB2_OP_RMDIR 10
 
 /* Used when constructing chained read requests. */
 #define CHAINED_REQUEST 1
--- a/fs/cifs/smb2inode.c
+++ b/fs/cifs/smb2inode.c
@@ -80,6 +80,10 @@ smb2_open_op_close(const unsigned int xi
                 * SMB2_open() call.
                 */
                break;
+       case SMB2_OP_RMDIR:
+               tmprc = SMB2_rmdir(xid, tcon, fid.persistent_fid,
+                                  fid.volatile_fid);
+               break;
        case SMB2_OP_RENAME:
                tmprc = SMB2_rename(xid, tcon, fid.persistent_fid,
                                    fid.volatile_fid, (__le16 *)data);
@@ -191,8 +195,8 @@ smb2_rmdir(const unsigned int xid, struc
           struct cifs_sb_info *cifs_sb)
 {
        return smb2_open_op_close(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
-                                 CREATE_NOT_FILE | CREATE_DELETE_ON_CLOSE,
-                                 NULL, SMB2_OP_DELETE);
+                                 CREATE_NOT_FILE,
+                                 NULL, SMB2_OP_RMDIR);
 }
 
 int
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -2291,6 +2291,22 @@ SMB2_rename(const unsigned int xid, stru
 }
 
 int
+SMB2_rmdir(const unsigned int xid, struct cifs_tcon *tcon,
+                 u64 persistent_fid, u64 volatile_fid)
+{
+       __u8 delete_pending = 1;
+       void *data;
+       unsigned int size;
+
+       data = &delete_pending;
+       size = 1; /* sizeof __u8 */
+
+       return send_set_info(xid, tcon, persistent_fid, volatile_fid,
+                       current->tgid, FILE_DISPOSITION_INFORMATION, 1, &data,
+                       &size);
+}
+
+int
 SMB2_set_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
                  u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
 {
--- a/fs/cifs/smb2proto.h
+++ b/fs/cifs/smb2proto.h
@@ -134,6 +134,8 @@ extern int SMB2_query_directory(const un
 extern int SMB2_rename(const unsigned int xid, struct cifs_tcon *tcon,
                       u64 persistent_fid, u64 volatile_fid,
                       __le16 *target_file);
+extern int SMB2_rmdir(const unsigned int xid, struct cifs_tcon *tcon,
+                     u64 persistent_fid, u64 volatile_fid);
 extern int SMB2_set_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
                             u64 persistent_fid, u64 volatile_fid,
                             __le16 *target_file);