[CIFS] Add posix (advisory) byte range locking support to cifs client

Samba (version 3) server support for this is also currently being
done.  This client code is in an experimental path (requires enabling
/proc/fs/cifs/Experimental) while it is being tested.

Signed-off-by: Steve French <sfrench@us.ibm.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/fs/cifs/cifspdu.h b/fs/cifs/cifspdu.h
index cc2471094ca5..b75866115c21 100644
--- a/fs/cifs/cifspdu.h
+++ b/fs/cifs/cifspdu.h
@@ -859,7 +859,10 @@ typedef struct smb_com_lock_req {
         LOCKING_ANDX_RANGE Locks[1];
 } __attribute__((packed)) LOCK_REQ;
 
-
+/* lock type */
+#define CIFS_RDLCK      0
+#define CIFS_WRLCK      1
+#define CIFS_UNLCK      2
 typedef struct cifs_posix_lock {
         __le16  lock_type;  /* 0 = Read, 1 = Write, 2 = Unlock */
         __le16  lock_flags; /* 1 = Wait (only valid for setlock) */