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From: Jeff Layton <jlayton@kernel.org>
Date: Tue, 16 Jan 2024 14:46:08 -0500
Subject: [PATCH 12/20] filelock: make __locks_delete_block and
 __locks_wake_up_blocks take file_lock_core
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To: Christian Brauner <brauner@kernel.org>, 
 Alexander Viro <viro@zeniv.linux.org.uk>, 
 Eric Van Hensbergen <ericvh@kernel.org>, 
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Cc: linux-kernel@vger.kernel.org, v9fs@lists.linux.dev, 
 linux-afs@lists.infradead.org, ceph-devel@vger.kernel.org, 
 gfs2@lists.linux.dev, linux-fsdevel@vger.kernel.org, 
 linux-nfs@vger.kernel.org, ocfs2-devel@lists.linux.dev, 
 linux-cifs@vger.kernel.org, samba-technical@lists.samba.org, 
 linux-trace-kernel@vger.kernel.org, Jeff Layton <jlayton@kernel.org>

Convert __locks_delete_block and __locks_wake_up_blocks to take a struct
file_lock_core pointer. Note that to accomodate this, we need to add a
new file_lock() wrapper to go from file_lock_core to file_lock.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
---
 fs/locks.c | 43 ++++++++++++++++++++++++++-----------------
 1 file changed, 26 insertions(+), 17 deletions(-)

diff --git a/fs/locks.c b/fs/locks.c
index eddf4d767d5d..6b8e8820dec9 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -92,6 +92,11 @@ static inline bool IS_LEASE(struct file_lock_core *flc)
 
 #define IS_REMOTELCK(fl)	(fl->fl_core.fl_pid <= 0)
 
+struct file_lock *file_lock(struct file_lock_core *flc)
+{
+	return container_of(flc, struct file_lock, fl_core);
+}
+
 static bool lease_breaking(struct file_lock *fl)
 {
 	return fl->fl_core.fl_flags & (FL_UNLOCK_PENDING | FL_DOWNGRADE_PENDING);
@@ -677,31 +682,35 @@ static void locks_delete_global_blocked(struct file_lock_core *waiter)
  *
  * Must be called with blocked_lock_lock held.
  */
-static void __locks_delete_block(struct file_lock *waiter)
+static void __locks_delete_block(struct file_lock_core *waiter)
 {
-	locks_delete_global_blocked(&waiter->fl_core);
-	list_del_init(&waiter->fl_core.fl_blocked_member);
+	locks_delete_global_blocked(waiter);
+	list_del_init(&waiter->fl_blocked_member);
 }
 
-static void __locks_wake_up_blocks(struct file_lock *blocker)
+static void __locks_wake_up_blocks(struct file_lock_core *blocker)
 {
-	while (!list_empty(&blocker->fl_core.fl_blocked_requests)) {
-		struct file_lock *waiter;
+	while (!list_empty(&blocker->fl_blocked_requests)) {
+		struct file_lock_core *waiter;
+		struct file_lock *fl;
+
+		waiter = list_first_entry(&blocker->fl_blocked_requests,
+					  struct file_lock_core, fl_blocked_member);
 
-		waiter = list_first_entry(&blocker->fl_core.fl_blocked_requests,
-					  struct file_lock, fl_core.fl_blocked_member);
+		fl = file_lock(waiter);
 		__locks_delete_block(waiter);
-		if (waiter->fl_lmops && waiter->fl_lmops->lm_notify)
-			waiter->fl_lmops->lm_notify(waiter);
+		if ((IS_POSIX(waiter) || IS_FLOCK(waiter)) &&
+		    fl->fl_lmops && fl->fl_lmops->lm_notify)
+			fl->fl_lmops->lm_notify(fl);
 		else
-			wake_up(&waiter->fl_core.fl_wait);
+			wake_up(&waiter->fl_wait);
 
 		/*
 		 * The setting of fl_blocker to NULL marks the "done"
 		 * point in deleting a block. Paired with acquire at the top
 		 * of locks_delete_block().
 		 */
-		smp_store_release(&waiter->fl_core.fl_blocker, NULL);
+		smp_store_release(&waiter->fl_blocker, NULL);
 	}
 }
 
@@ -743,8 +752,8 @@ int locks_delete_block(struct file_lock *waiter)
 	spin_lock(&blocked_lock_lock);
 	if (waiter->fl_core.fl_blocker)
 		status = 0;
-	__locks_wake_up_blocks(waiter);
-	__locks_delete_block(waiter);
+	__locks_wake_up_blocks(&waiter->fl_core);
+	__locks_delete_block(&waiter->fl_core);
 
 	/*
 	 * The setting of fl_blocker to NULL marks the "done" point in deleting
@@ -799,7 +808,7 @@ static void __locks_insert_block(struct file_lock *blocker,
 	 * waiter, but might not conflict with blocker, or the requests
 	 * and lock which block it.  So they all need to be woken.
 	 */
-	__locks_wake_up_blocks(waiter);
+	__locks_wake_up_blocks(&waiter->fl_core);
 }
 
 /* Must be called with flc_lock held. */
@@ -831,7 +840,7 @@ static void locks_wake_up_blocks(struct file_lock *blocker)
 		return;
 
 	spin_lock(&blocked_lock_lock);
-	__locks_wake_up_blocks(blocker);
+	__locks_wake_up_blocks(&blocker->fl_core);
 	spin_unlock(&blocked_lock_lock);
 }
 
@@ -1186,7 +1195,7 @@ static int posix_lock_inode(struct inode *inode, struct file_lock *request,
 			 * Ensure that we don't find any locks blocked on this
 			 * request during deadlock detection.
 			 */
-			__locks_wake_up_blocks(request);
+			__locks_wake_up_blocks(&request->fl_core);
 			if (likely(!posix_locks_deadlock(request, fl))) {
 				error = FILE_LOCK_DEFERRED;
 				__locks_insert_block(fl, request,

-- 
2.43.0