cifs: Add support for writing attributes on SMB2+

This adds support for writing extended attributes on SMB2+ shares.
Attributes can be written using the setfattr command.

RH-bz: 1110709

Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
diff --git a/fs/cifs/smb2proto.h b/fs/cifs/smb2proto.h
index 183389b..0032170 100644
--- a/fs/cifs/smb2proto.h
+++ b/fs/cifs/smb2proto.h
@@ -172,6 +172,9 @@ extern int SMB2_set_info(const unsigned int xid, struct cifs_tcon *tcon,
 extern int SMB2_set_acl(const unsigned int xid, struct cifs_tcon *tcon,
 			u64 persistent_fid, u64 volatile_fid,
 			struct cifs_ntsd *pnntsd, int pacllen, int aclflag);
+extern int SMB2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
+		       u64 persistent_fid, u64 volatile_fid,
+		       struct smb2_file_full_ea_info *buf, int len);
 extern int SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
 				u64 persistent_fid, u64 volatile_fid);
 extern int SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon,