17 static void afs_fl_copy_lock(struct file_lock *new, struct file_lock *fl);
18 static void afs_fl_release_private(struct file_lock *fl);
83 static void afs_grant_locks(struct afs_vnode *vnode, struct file_lock *fl)  in afs_grant_locks()  argument
87 	list_move_tail(&fl->fl_u.afs.link, &vnode->granted_locks);  in afs_grant_locks()
88 	if (fl->fl_type == F_RDLCK) {  in afs_grant_locks()
110 	struct file_lock *fl;  in afs_lock_work()  local
144 		fl = list_entry(vnode->granted_locks.next,  in afs_lock_work()
146 		key = key_get(fl->fl_file->private_data);  in afs_lock_work()
178 		fl = list_entry(vnode->pending_locks.next,  in afs_lock_work()
180 		key = key_get(fl->fl_file->private_data);  in afs_lock_work()
181 		type = (fl->fl_type == F_RDLCK) ?  in afs_lock_work()
203 				       struct file_lock, fl_u.afs.link) == fl) {  in afs_lock_work()
204 				fl->fl_u.afs.state = ret;  in afs_lock_work()
206 					afs_grant_locks(vnode, fl);  in afs_lock_work()
208 					list_del_init(&fl->fl_u.afs.link);  in afs_lock_work()
209 				wake_up(&fl->fl_wait);  in afs_lock_work()
253 static int afs_do_setlk(struct file *file, struct file_lock *fl)  in afs_do_setlk()  argument
261 	_enter("{%x:%u},%u", vnode->fid.vid, vnode->fid.vnode, fl->fl_type);  in afs_do_setlk()
264 	if (fl->fl_start != 0 || fl->fl_end != OFFSET_MAX)  in afs_do_setlk()
271 	fl->fl_ops = &afs_lock_ops;  in afs_do_setlk()
272 	INIT_LIST_HEAD(&fl->fl_u.afs.link);  in afs_do_setlk()
273 	fl->fl_u.afs.state = AFS_LOCK_PENDING;  in afs_do_setlk()
275 	type = (fl->fl_type == F_RDLCK) ? AFS_LOCK_READ : AFS_LOCK_WRITE;  in afs_do_setlk()
285 	if (vnode->status.lock_count != 0 && !(fl->fl_flags & FL_SLEEP)) {  in afs_do_setlk()
314 		list_add_tail(&fl->fl_u.afs.link, &vnode->pending_locks);  in afs_do_setlk()
329 				  &fl->fl_u.afs.link);  in afs_do_setlk()
333 			list_del_init(&fl->fl_u.afs.link);  in afs_do_setlk()
341 	list_add_tail(&fl->fl_u.afs.link, &vnode->pending_locks);  in afs_do_setlk()
343 	if (!(fl->fl_flags & FL_SLEEP)) {  in afs_do_setlk()
353 	ret = wait_event_interruptible(fl->fl_wait,  in afs_do_setlk()
354 				       fl->fl_u.afs.state <= AFS_LOCK_GRANTED);  in afs_do_setlk()
355 	if (fl->fl_u.afs.state <= AFS_LOCK_GRANTED) {  in afs_do_setlk()
356 		ret = fl->fl_u.afs.state;  in afs_do_setlk()
369 	if (fl->fl_u.afs.state <= AFS_LOCK_GRANTED) {  in afs_do_setlk()
370 		ret = fl->fl_u.afs.state;  in afs_do_setlk()
383 	    vnode->pending_locks.next == &fl->fl_u.afs.link) {  in afs_do_setlk()
384 		if (vnode->pending_locks.prev != &fl->fl_u.afs.link) {  in afs_do_setlk()
386 			list_del_init(&fl->fl_u.afs.link);  in afs_do_setlk()
390 		list_del_init(&fl->fl_u.afs.link);  in afs_do_setlk()
406 	fl->fl_u.afs.state = AFS_LOCK_GRANTED;  in afs_do_setlk()
407 	list_move_tail(&fl->fl_u.afs.link, &vnode->granted_locks);  in afs_do_setlk()
413 	ret = posix_lock_file(file, fl, NULL);  in afs_do_setlk()
432 	list_del_init(&fl->fl_u.afs.link);  in afs_do_setlk()
441 static int afs_do_unlk(struct file *file, struct file_lock *fl)  in afs_do_unlk()  argument
447 	_enter("{%x:%u},%u", vnode->fid.vid, vnode->fid.vnode, fl->fl_type);  in afs_do_unlk()
450 	if (fl->fl_start != 0 || fl->fl_end != OFFSET_MAX)  in afs_do_unlk()
453 	fl->fl_ops = &afs_lock_ops;  in afs_do_unlk()
454 	INIT_LIST_HEAD(&fl->fl_u.afs.link);  in afs_do_unlk()
455 	fl->fl_u.afs.state = AFS_LOCK_PENDING;  in afs_do_unlk()
458 	ret = posix_lock_file(file, fl, NULL);  in afs_do_unlk()
476 static int afs_do_getlk(struct file *file, struct file_lock *fl)  in afs_do_getlk()  argument
484 	fl->fl_type = F_UNLCK;  in afs_do_getlk()
490 	posix_test_lock(file, fl);  in afs_do_getlk()
491 	if (fl->fl_type == F_UNLCK) {  in afs_do_getlk()
499 				fl->fl_type = F_RDLCK;  in afs_do_getlk()
501 				fl->fl_type = F_WRLCK;  in afs_do_getlk()
502 			fl->fl_start = 0;  in afs_do_getlk()
503 			fl->fl_end = OFFSET_MAX;  in afs_do_getlk()
509 	_leave(" = %d [%hd]", ret, fl->fl_type);  in afs_do_getlk()
516 int afs_lock(struct file *file, int cmd, struct file_lock *fl)  in afs_lock()  argument
522 	       fl->fl_type, fl->fl_flags,  in afs_lock()
523 	       (long long) fl->fl_start, (long long) fl->fl_end);  in afs_lock()
526 	if (__mandatory_lock(&vnode->vfs_inode) && fl->fl_type != F_UNLCK)  in afs_lock()
530 		return afs_do_getlk(file, fl);  in afs_lock()
531 	if (fl->fl_type == F_UNLCK)  in afs_lock()
532 		return afs_do_unlk(file, fl);  in afs_lock()
533 	return afs_do_setlk(file, fl);  in afs_lock()
539 int afs_flock(struct file *file, int cmd, struct file_lock *fl)  in afs_flock()  argument
545 	       fl->fl_type, fl->fl_flags);  in afs_flock()
554 	if (!(fl->fl_flags & FL_FLOCK))  in afs_flock()
558 	if (fl->fl_type == F_UNLCK)  in afs_flock()
559 		return afs_do_unlk(file, fl);  in afs_flock()
560 	return afs_do_setlk(file, fl);  in afs_flock()
569 static void afs_fl_copy_lock(struct file_lock *new, struct file_lock *fl)  in afs_fl_copy_lock()  argument
573 	list_add(&new->fl_u.afs.link, &fl->fl_u.afs.link);  in afs_fl_copy_lock()
580 static void afs_fl_release_private(struct file_lock *fl)  in afs_fl_release_private()  argument
584 	list_del_init(&fl->fl_u.afs.link);  in afs_fl_release_private()