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cifs: do not attempt cifs operation on smb2+ rename error

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A path-based rename returning EBUSY will incorrectly try opening
the file with a cifs (NT Create AndX) operation on an smb2+ mount,
which causes the server to force a session close.

If the mount is smb2+, skip the fallback.

Signed-off-by: Frank Sorenson <sorenson@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
CC: Stable <stable@vger.kernel.org>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
This commit is contained in:
Frank Sorenson 2019-04-16 08:37:27 -05:00 committed by Steve French
parent 05fd5c2c61
commit 652727bbe1
1 changed files with 4 additions and 0 deletions
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4
fs/cifs/inode.c
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@ -1735,6 +1735,10 @@ cifs_do_rename(const unsigned int xid, struct dentry *from_dentry,
if (rc == 0 || rc != -EBUSY)
goto do_rename_exit;
/* Don't fall back to using SMB on SMB 2+ mount */
if (server->vals->protocol_id != 0)
goto do_rename_exit;
/* open-file renames don't work across directories */
if (to_dentry->d_parent != from_dentry->d_parent)
goto do_rename_exit;