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authorPaulo Alcantara <palcantara@suse.de>2018-05-04 11:25:26 -0300
committerSteve French <smfrench@gmail.com>2018-05-09 11:48:42 -0500
commitae2cd7fb478b8da707906ee1706ae1379968a8f9 (patch)
tree1884c6ee363e9f0067ba11f791744e2767f25076
parentf7c439668a291ca94f358e44d3a3e9f2a2524b8a (diff)
downloadlinux-ae2cd7fb478b8da707906ee1706ae1379968a8f9.tar.bz2
cifs: smb2ops: Fix listxattr() when there are no EAs
As per listxattr(2): On success, a nonnegative number is returned indicating the size of the extended attribute name list. On failure, -1 is returned and errno is set appropriately. In SMB1, when the server returns an empty EA list through a listxattr(), it will correctly return 0 as there are no EAs for the given file. However, in SMB2+, it returns -ENODATA in listxattr() which is wrong since the request and response were sent successfully, although there's no actual EA for the given file. This patch fixes listxattr() for SMB2+ by returning 0 in cifs_listxattr() when the server returns an empty list of EAs. Signed-off-by: Paulo Alcantara <palcantara@suse.de> Reviewed-by: Aurelien Aptel <aaptel@suse.com> Signed-off-by: Steve French <smfrench@gmail.com>
-rw-r--r--fs/cifs/smb2ops.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index b76b85881dcc..9c6d95ffca97 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -589,9 +589,15 @@ smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
+ /*
+ * If ea_name is NULL (listxattr) and there are no EAs, return 0 as it's
+ * not an error. Otherwise, the specified ea_name was not found.
+ */
if (!rc)
rc = move_smb2_ea_to_cifs(ea_data, buf_size, smb2_data,
SMB2_MAX_EA_BUF, ea_name);
+ else if (!ea_name && rc == -ENODATA)
+ rc = 0;
kfree(smb2_data);
return rc;