[PATCH v3 24/47] filelock: make __locks_delete_block and __locks_wake_up_blocks take file_lock_core

Jeff Layton
2024-01-31T23:03:51Z

Convert __locks_delete_block and __locks_wake_up_blocks to take a struct
file_lock_core pointer.

While we could do this in another way, we're going to need to add a
file_lock() helper function later anyway, so introduce and use it now.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
---
fs/locks.c | 45 +++++++++++++++++++++++++++------------------
1 file changed, 27 insertions(+), 18 deletions(-)

diff --git a/fs/locks.c b/fs/locks.c
index ef67a5a7bae8..1e8b943bd7f9 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -69,6 +69,11 @@

#include <linux/uaccess.h>

+static struct file_lock *file_lock(struct file_lock_core *flc)
+{
+ return container_of(flc, struct file_lock, c);
+}
+
static bool lease_breaking(struct file_lock *fl)
{
return fl->c.flc_flags & (FL_UNLOCK_PENDING | FL_DOWNGRADE_PENDING);
@@ -654,31 +659,35 @@ 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->c);
- list_del_init(&waiter->c.flc_blocked_member);
+ locks_delete_global_blocked(waiter);
+ list_del_init(&waiter->flc_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->c.flc_blocked_requests)) {
- struct file_lock *waiter;
+ while (!list_empty(&blocker->flc_blocked_requests)) {
+ struct file_lock_core *waiter;
+ struct file_lock *fl;
+
+ waiter = list_first_entry(&blocker->flc_blocked_requests,
+ struct file_lock_core, flc_blocked_member);

- waiter = list_first_entry(&blocker->c.flc_blocked_requests,
- struct file_lock, c.flc_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 ((waiter->flc_flags & (FL_POSIX | FL_FLOCK)) &&
+ fl->fl_lmops && fl->fl_lmops->lm_notify)
+ fl->fl_lmops->lm_notify(fl);
else
- locks_wake_up(waiter);
+ locks_wake_up(fl);

/*
- * The setting of fl_blocker to NULL marks the "done"
+ * The setting of flc_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->c.flc_blocker, NULL);
+ smp_store_release(&waiter->flc_blocker, NULL);
}
}

@@ -720,8 +729,8 @@ int locks_delete_block(struct file_lock *waiter)
spin_lock(&blocked_lock_lock);
if (waiter->c.flc_blocker)
status = 0;
- __locks_wake_up_blocks(waiter);
- __locks_delete_block(waiter);
+ __locks_wake_up_blocks(&waiter->c);
+ __locks_delete_block(&waiter->c);

/*
* The setting of fl_blocker to NULL marks the "done" point in deleting
@@ -773,7 +782,7 @@ 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->c);
}

/* Must be called with flc_lock held. */
@@ -805,7 +814,7 @@ 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->c);
spin_unlock(&blocked_lock_lock);
}

@@ -1159,7 +1168,7 @@ 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->c);
if (likely(!posix_locks_deadlock(request, fl))) {
error = FILE_LOCK_DEFERRED;
__locks_insert_block(fl, request,

--
2.43.0