[CIFS]

Allow Windows blocking locks to be cancelled via a
CANCEL_LOCK call. TODO - restrict this to servers
that support NT_STATUS codes (Win9x will probably
not support this call).

Signed-off-by: Jeremy Allison <jra@samba.org>
Signed-off-by: Steve French <sfrench@us.ibm.com>
(cherry picked from 570d4d2d895569825d0d017d4e76b51138f68864 commit)

1 files changed, 9 insertions, 6 deletions

diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index 39b43e6a7509..b24006c47df1 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -3,6 +3,7 @@
  *
  *   Copyright (C) International Business Machines  Corp., 2002,2006
  *   Author(s): Steve French (sfrench@us.ibm.com)
+ *              Jeremy Allison (jra@samba.org)
  *
  *   This library is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU Lesser General Public License as published
@@ -267,14 +268,14 @@ struct cifsTconInfo {
 };
 
 /*
- * This info hangs off the cifsFileInfo structure.  This is used to track
- * byte stream locks on the file
+ * This info hangs off the cifsFileInfo structure, pointed to by llist.
+ * This is used to track byte stream locks on the file
  */
 struct cifsLockInfo {
-        struct cifsLockInfo *next;
-        int start;
-        int length;
-        int type;
+        struct list_head llist; /* pointer to next cifsLockInfo */
+        __u64 offset;
+        __u64 length;
+        __u8 type;
 };
 
 /*
@@ -305,6 +306,8 @@ struct cifsFileInfo {
         /* lock scope id (0 if none) */
         struct file * pfile; /* needed for writepage */
         struct inode * pInode; /* needed for oplock break */
+        struct semaphore lock_sem;
+        struct list_head llist; /* list of byte range locks we have. */
         unsigned closePend:1;   /* file is marked to close */
         unsigned invalidHandle:1;  /* file closed via session abend */
         atomic_t wrtPending;   /* handle in use - defer close */