diff mbox

[3/5,v3] locks: New ops in file_lock_operations for copy/release owner

Message ID 53ED4F9D.3070103@gmail.com (mailing list archive)
State New, archived
Headers show

Commit Message

Kinglong Mee Aug. 15, 2014, 12:09 a.m. UTC 
NFSD or other lockmanager may increase the owner's reference,
so adds two new options for copying and releasing owner.

v3: same as v2, isn't exist in v1.

Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
---
 fs/locks.c         | 12 ++++++++++--
 include/linux/fs.h |  2 ++
 2 files changed, 12 insertions(+), 2 deletions(-)
diff mbox

Patch

diff --git a/fs/locks.c b/fs/locks.c
index fe52abb..cbe9b82 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -230,8 +230,12 @@  void locks_release_private(struct file_lock *fl)
 			fl->fl_ops->fl_release_private(fl);
 		fl->fl_ops = NULL;
 	}
-	fl->fl_lmops = NULL;
 
+	if (fl->fl_lmops) {
+		if (fl->fl_lmops->lm_release_owner)
+			fl->fl_lmops->lm_release_owner(fl);
+		fl->fl_lmops = NULL;
+	}
 }
 EXPORT_SYMBOL_GPL(locks_release_private);
 
@@ -274,8 +278,12 @@  static void locks_copy_private(struct file_lock *new, struct file_lock *fl)
 			fl->fl_ops->fl_copy_lock(new, fl);
 		new->fl_ops = fl->fl_ops;
 	}
-	if (fl->fl_lmops)
+
+	if (fl->fl_lmops) {
+		if (fl->fl_lmops->lm_copy_owner)
+			fl->fl_lmops->lm_copy_owner(new, fl);
 		new->fl_lmops = fl->fl_lmops;
+	}
 }
 
 /*
diff --git a/include/linux/fs.h b/include/linux/fs.h
index a383a30..54bf69d 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_copy_owner)(struct file_lock *, struct file_lock *);
+	void (*lm_release_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 *);