19 static void afs_fl_copy_lock(struct file_lock *new, struct file_lock *fl);
20 static void afs_fl_release_private(struct file_lock *fl);
52 static void afs_grant_locks(struct afs_vnode *vnode, struct file_lock *fl)  in afs_grant_locks()  argument
56 	list_move_tail(&fl->fl_u.afs.link, &vnode->granted_locks);  in afs_grant_locks()
57 	if (fl->fl_type == F_RDLCK) {  in afs_grant_locks()
173 	struct file_lock *fl, *next;  in afs_lock_work()  local
286 			fl = list_entry(vnode->pending_locks.next,  in afs_lock_work()
288 			type = (fl->fl_type == F_RDLCK) ? AFS_LOCK_READ : AFS_LOCK_WRITE;  in afs_lock_work()
295 			fl->fl_u.afs.state = ret;  in afs_lock_work()
297 				afs_grant_locks(vnode, fl);  in afs_lock_work()
299 				list_del_init(&fl->fl_u.afs.link);  in afs_lock_work()
300 			wake_up(&fl->fl_wait);  in afs_lock_work()
382 static void afs_dequeue_lock(struct afs_vnode *vnode, struct file_lock *fl)  in afs_dequeue_lock()  argument
392 	if (vnode->granted_locks.next == &fl->fl_u.afs.link &&  in afs_dequeue_lock()
393 	    vnode->granted_locks.prev == &fl->fl_u.afs.link) {  in afs_dequeue_lock()
394 		list_del_init(&fl->fl_u.afs.link);  in afs_dequeue_lock()
400 	    vnode->pending_locks.next != &fl->fl_u.afs.link) {  in afs_dequeue_lock()
401 		list_del_init(&fl->fl_u.afs.link);  in afs_dequeue_lock()
405 	list_del_init(&fl->fl_u.afs.link);  in afs_dequeue_lock()
425 static int afs_do_setlk(struct file *file, struct file_lock *fl)  in afs_do_setlk()  argument
433 	_enter("{%x:%u},%u", vnode->fid.vid, vnode->fid.vnode, fl->fl_type);  in afs_do_setlk()
436 	if (fl->fl_start != 0 || fl->fl_end != OFFSET_MAX)  in afs_do_setlk()
439 	fl->fl_ops = &afs_lock_ops;  in afs_do_setlk()
440 	INIT_LIST_HEAD(&fl->fl_u.afs.link);  in afs_do_setlk()
441 	fl->fl_u.afs.state = AFS_LOCK_PENDING;  in afs_do_setlk()
443 	type = (fl->fl_type == F_RDLCK) ? AFS_LOCK_READ : AFS_LOCK_WRITE;  in afs_do_setlk()
445 	ret = afs_do_setlk_check(vnode, key, type, fl->fl_flags & FL_SLEEP);  in afs_do_setlk()
463 	list_add_tail(&fl->fl_u.afs.link, &vnode->pending_locks);  in afs_do_setlk()
496 		ASSERTCMP(vnode->pending_locks.next, ==, &fl->fl_u.afs.link);  in afs_do_setlk()
512 	fl->fl_u.afs.state = AFS_LOCK_GRANTED;  in afs_do_setlk()
513 	list_move_tail(&fl->fl_u.afs.link, &vnode->granted_locks);  in afs_do_setlk()
519 	ret = posix_lock_file(file, fl, NULL);  in afs_do_setlk()
538 	if (fl->fl_flags & FL_SLEEP) {  in afs_do_setlk()
542 		ret = wait_event_interruptible(fl->fl_wait,  in afs_do_setlk()
543 					       fl->fl_u.afs.state != AFS_LOCK_PENDING);  in afs_do_setlk()
548 	if (fl->fl_u.afs.state == AFS_LOCK_GRANTED)  in afs_do_setlk()
550 	if (fl->fl_u.afs.state < 0)  in afs_do_setlk()
551 		ret = fl->fl_u.afs.state;  in afs_do_setlk()
557 	afs_dequeue_lock(vnode, fl);  in afs_do_setlk()
571 	list_del_init(&fl->fl_u.afs.link);  in afs_do_setlk()
580 static int afs_do_unlk(struct file *file, struct file_lock *fl)  in afs_do_unlk()  argument
585 	_enter("{%x:%u},%u", vnode->fid.vid, vnode->fid.vnode, fl->fl_type);  in afs_do_unlk()
591 	if (fl->fl_start != 0 || fl->fl_end != OFFSET_MAX)  in afs_do_unlk()
594 	ret = posix_lock_file(file, fl, NULL);  in afs_do_unlk()
602 static int afs_do_getlk(struct file *file, struct file_lock *fl)  in afs_do_getlk()  argument
610 	fl->fl_type = F_UNLCK;  in afs_do_getlk()
613 	posix_test_lock(file, fl);  in afs_do_getlk()
614 	if (fl->fl_type == F_UNLCK) {  in afs_do_getlk()
622 			fl->fl_type = F_RDLCK;  in afs_do_getlk()
624 			fl->fl_type = F_WRLCK;  in afs_do_getlk()
625 		fl->fl_start = 0;  in afs_do_getlk()
626 		fl->fl_end = OFFSET_MAX;  in afs_do_getlk()
631 	_leave(" = %d [%hd]", ret, fl->fl_type);  in afs_do_getlk()
638 int afs_lock(struct file *file, int cmd, struct file_lock *fl)  in afs_lock()  argument
644 	       fl->fl_type, fl->fl_flags,  in afs_lock()
645 	       (long long) fl->fl_start, (long long) fl->fl_end);  in afs_lock()
648 	if (__mandatory_lock(&vnode->vfs_inode) && fl->fl_type != F_UNLCK)  in afs_lock()
652 		return afs_do_getlk(file, fl);  in afs_lock()
653 	if (fl->fl_type == F_UNLCK)  in afs_lock()
654 		return afs_do_unlk(file, fl);  in afs_lock()
655 	return afs_do_setlk(file, fl);  in afs_lock()
661 int afs_flock(struct file *file, int cmd, struct file_lock *fl)  in afs_flock()  argument
667 	       fl->fl_type, fl->fl_flags);  in afs_flock()
676 	if (!(fl->fl_flags & FL_FLOCK))  in afs_flock()
680 	if (fl->fl_type == F_UNLCK)  in afs_flock()
681 		return afs_do_unlk(file, fl);  in afs_flock()
682 	return afs_do_setlk(file, fl);  in afs_flock()
691 static void afs_fl_copy_lock(struct file_lock *new, struct file_lock *fl)  in afs_fl_copy_lock()  argument
693 	struct afs_vnode *vnode = AFS_FS_I(locks_inode(fl->fl_file));  in afs_fl_copy_lock()
698 	list_add(&new->fl_u.afs.link, &fl->fl_u.afs.link);  in afs_fl_copy_lock()
706 static void afs_fl_release_private(struct file_lock *fl)  in afs_fl_release_private()  argument
708 	struct afs_vnode *vnode = AFS_FS_I(locks_inode(fl->fl_file));  in afs_fl_release_private()
713 	afs_dequeue_lock(vnode, fl);  in afs_fl_release_private()