AFS: implement file locking

Implement file locking for AFS.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 51c938a71dec..aa4530c1ff7a 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -820,6 +820,10 @@ struct file_lock {
         union {
                 struct nfs_lock_info    nfs_fl;
                 struct nfs4_lock_info   nfs4_fl;
+                struct {
+                        struct list_head link;  /* link in AFS vnode's pending_locks list */
+                        int state;              /* state of grant or error if -ve */
+                } afs;
         } fl_u;
 };