locks: New ops in lock_manager_operations for get/put owner

NFSD or other lockmanager may increase the owner's reference,
so adds two new options for copying and releasing owner.

v5: change order from 2/6 to 3/6
v4: rename lm_copy_owner/lm_release_owner to lm_get_owner/lm_put_owner

Reviewed-by: Jeff Layton <jlayton@primarydata.com>
Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
Signed-off-by: Jeff Layton <jlayton@primarydata.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 5ab86f44b697..3b07ce2698de 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -868,6 +868,8 @@ struct file_lock_operations {
 struct lock_manager_operations {
         int (*lm_compare_owner)(struct file_lock *, struct file_lock *);
         unsigned long (*lm_owner_key)(struct file_lock *);
+        void (*lm_get_owner)(struct file_lock *, struct file_lock *);
+        void (*lm_put_owner)(struct file_lock *);
         void (*lm_notify)(struct file_lock *);  /* unblock callback */
         int (*lm_grant)(struct file_lock *, int);
         void (*lm_break)(struct file_lock *);