[PATCH v3 28/47] filelock: reorganize locks_delete_block and __locks_insert_block

Jeff Layton
2024-01-31T23:04:07Z

Rename the old __locks_delete_block to __locks_unlink_lock. Rename
change old locks_delete_block function to __locks_delete_block and
have it take a file_lock_core. Make locks_delete_block a simple wrapper
around __locks_delete_block.

Also, change __locks_insert_block to take struct file_lock_core, and
fix up its callers.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
---
fs/locks.c | 42 ++++++++++++++++++++++--------------------
1 file changed, 22 insertions(+), 20 deletions(-)

diff --git a/fs/locks.c b/fs/locks.c
index a2be1e0b5a94..c8fd2964dd98 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -659,7 +659,7 @@ 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_core *waiter)
+static void __locks_unlink_block(struct file_lock_core *waiter)
{
locks_delete_global_blocked(waiter);
list_del_init(&waiter->flc_blocked_member);
@@ -675,7 +675,7 @@ static void __locks_wake_up_blocks(struct file_lock_core *blocker)
struct file_lock_core, flc_blocked_member);

fl = file_lock(waiter);
- __locks_delete_block(waiter);
+ __locks_unlink_block(waiter);
if ((waiter->flc_flags & (FL_POSIX | FL_FLOCK)) &&
fl->fl_lmops && fl->fl_lmops->lm_notify)
fl->fl_lmops->lm_notify(fl);
@@ -691,16 +691,9 @@ static void __locks_wake_up_blocks(struct file_lock_core *blocker)
}
}

-/**
- * locks_delete_block - stop waiting for a file lock
- * @waiter: the lock which was waiting
- *
- * lockd/nfsd need to disconnect the lock while working on it.
- */
-int locks_delete_block(struct file_lock *waiter_fl)
+static int __locks_delete_block(struct file_lock_core *waiter)
{
int status = -ENOENT;
- struct file_lock_core *waiter = &waiter_fl->c;

/*
* If fl_blocker is NULL, it won't be set again as this thread "owns"
@@ -731,7 +724,7 @@ int locks_delete_block(struct file_lock *waiter_fl)
if (waiter->flc_blocker)
status = 0;
__locks_wake_up_blocks(waiter);
- __locks_delete_block(waiter);
+ __locks_unlink_block(waiter);

/*
* The setting of fl_blocker to NULL marks the "done" point in deleting
@@ -741,6 +734,17 @@ int locks_delete_block(struct file_lock *waiter_fl)
spin_unlock(&blocked_lock_lock);
return status;
}
+
+/**
+ * locks_delete_block - stop waiting for a file lock
+ * @waiter: the lock which was waiting
+ *
+ * lockd/nfsd need to disconnect the lock while working on it.
+ */
+int locks_delete_block(struct file_lock *waiter)
+{
+ return __locks_delete_block(&waiter->c);
+}
EXPORT_SYMBOL(locks_delete_block);

/* Insert waiter into blocker's block list.
@@ -758,13 +762,11 @@ EXPORT_SYMBOL(locks_delete_block);
* waiters, and add beneath any waiter that blocks the new waiter.
* Thus wakeups don't happen until needed.
*/
-static void __locks_insert_block(struct file_lock *blocker_fl,
- struct file_lock *waiter_fl,
+static void __locks_insert_block(struct file_lock_core *blocker,
+ struct file_lock_core *waiter,
bool conflict(struct file_lock_core *,
struct file_lock_core *))
{
- struct file_lock_core *blocker = &blocker_fl->c;
- struct file_lock_core *waiter = &waiter_fl->c;
struct file_lock_core *flc;

BUG_ON(!list_empty(&waiter->flc_blocked_member));
@@ -789,8 +791,8 @@ static void __locks_insert_block(struct file_lock *blocker_fl,
}

/* Must be called with flc_lock held. */
-static void locks_insert_block(struct file_lock *blocker,
- struct file_lock *waiter,
+static void locks_insert_block(struct file_lock_core *blocker,
+ struct file_lock_core *waiter,
bool conflict(struct file_lock_core *,
struct file_lock_core *))
{
@@ -1088,7 +1090,7 @@ static int flock_lock_inode(struct inode *inode, struct file_lock *request)
if (!(request->c.flc_flags & FL_SLEEP))
goto out;
error = FILE_LOCK_DEFERRED;
- locks_insert_block(fl, request, flock_locks_conflict);
+ locks_insert_block(&fl->c, &request->c, flock_locks_conflict);
goto out;
}
if (request->c.flc_flags & FL_ACCESS)
@@ -1182,7 +1184,7 @@ static int posix_lock_inode(struct inode *inode, struct file_lock *request,
__locks_wake_up_blocks(&request->c);
if (likely(!posix_locks_deadlock(request, fl))) {
error = FILE_LOCK_DEFERRED;
- __locks_insert_block(fl, request,
+ __locks_insert_block(&fl->c, &request->c,
posix_locks_conflict);
}
spin_unlock(&blocked_lock_lock);
@@ -1575,7 +1577,7 @@ int __break_lease(struct inode *inode, unsigned int mode, unsigned int type)
break_time -= jiffies;
if (break_time == 0)
break_time++;
- locks_insert_block(fl, new_fl, leases_conflict);
+ locks_insert_block(&fl->c, &new_fl->c, leases_conflict);
trace_break_lease_block(inode, new_fl);
spin_unlock(&ctx->flc_lock);
percpu_up_read(&file_rwsem);

--
2.43.0