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-rw-r--r--fs/locks.c38
1 files changed, 14 insertions, 24 deletions
diff --git a/fs/locks.c b/fs/locks.c
index 4d6a5a3f903a..75a03a9d666e 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -748,8 +748,16 @@ static void __locks_wake_up_blocks(struct file_lock *blocker)
}
}
-static void locks_delete_block(struct file_lock *waiter)
+/**
+ * locks_delete_lock - 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)
{
+ int status = -ENOENT;
+
/*
* If fl_blocker is NULL, it won't be set again as this thread
* "owns" the lock and is the only one that might try to claim
@@ -763,12 +771,16 @@ static void locks_delete_block(struct file_lock *waiter)
*/
if (waiter->fl_blocker == NULL &&
list_empty(&waiter->fl_blocked_requests))
- return;
+ return status;
spin_lock(&blocked_lock_lock);
+ if (waiter->fl_blocker)
+ status = 0;
__locks_wake_up_blocks(waiter);
__locks_delete_block(waiter);
spin_unlock(&blocked_lock_lock);
+ return status;
}
+EXPORT_SYMBOL(locks_delete_block);
/* Insert waiter into blocker's block list.
* We use a circular list so that processes can be easily woken up in
@@ -2676,28 +2688,6 @@ void locks_remove_file(struct file *filp)
}
/**
- * posix_unblock_lock - stop waiting for a file lock
- * @waiter: the lock which was waiting
- *
- * lockd needs to block waiting for locks.
- */
-int
-posix_unblock_lock(struct file_lock *waiter)
-{
- int status = -ENOENT;
-
- spin_lock(&blocked_lock_lock);
- if (waiter->fl_blocker) {
- __locks_wake_up_blocks(waiter);
- __locks_delete_block(waiter);
- status = 0;
- }
- spin_unlock(&blocked_lock_lock);
- return status;
-}
-EXPORT_SYMBOL(posix_unblock_lock);
-
-/**
* vfs_cancel_lock - file byte range unblock lock
* @filp: The file to apply the unblock to
* @fl: The lock to be unblocked