Patch "remove directory incorrectly tries to set delete on close on non-empty directories" has been added to the 4.4-stable tree

[<gregkh@linuxfoundation.org>]

This is a note to let you know that I've just added the patch titled

    remove directory incorrectly tries to set delete on close on non-empty directories

to the 4.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     remove-directory-incorrectly-tries-to-set-delete-on-close-on-non-empty-directories.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 897fba1172d637d344f009d700f7eb8a1fa262f1 Mon Sep 17 00:00:00 2001
From: Steve French <smfrench@gmail.com>
Date: Thu, 12 May 2016 21:20:36 -0500
Subject: remove directory incorrectly tries to set delete on close on non-empty directories

From: Steve French <smfrench@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.french@primarydata.com>
Acked-by: Sachin Prabhu <sprabhu@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@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
@@ -2577,6 +2577,22 @@ 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
@@ -140,6 +140,8 @@ 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);


Patches currently in stable-queue which might be from smfrench@gmail.com are

queue-4.4/fs-cifs-correctly-to-anonymous-authentication-for-the-ntlm-v1-authentication.patch
queue-4.4/remove-directory-incorrectly-tries-to-set-delete-on-close-on-non-empty-directories.patch
queue-4.4/fs-cifs-correctly-to-anonymous-authentication-for-the-lanman-authentication.patch
queue-4.4/fs-cifs-correctly-to-anonymous-authentication-for-the-ntlm-v2-authentication.patch
queue-4.4/fs-cifs-correctly-to-anonymous-authentication-via-ntlmssp.patch
queue-4.4/cifs-create-dedicated-keyring-for-spnego-operations.patch