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);
451 static int afs_do_setlk(struct file *file, struct file_lock *fl)  in afs_do_setlk()  argument
466 	       fl->fl_start, fl->fl_end, fl->c.flc_type, mode);  in afs_do_setlk()
468 	fl->fl_ops = &afs_lock_ops;  in afs_do_setlk()
469 	INIT_LIST_HEAD(&fl->fl_u.afs.link);  in afs_do_setlk()
470 	fl->fl_u.afs.state = AFS_LOCK_PENDING;  in afs_do_setlk()
472 	partial = (fl->fl_start != 0 || fl->fl_end != OFFSET_MAX);  in afs_do_setlk()
473 	type = lock_is_read(fl) ? AFS_LOCK_READ : AFS_LOCK_WRITE;  in afs_do_setlk()
481 	trace_afs_flock_op(vnode, fl, afs_flock_op_set_lock);  in afs_do_setlk()
498 	list_add_tail(&fl->fl_u.afs.link, &vnode->pending_locks);  in afs_do_setlk()
512 			list_move_tail(&fl->fl_u.afs.link, &vnode->granted_locks);  in afs_do_setlk()
513 			fl->fl_u.afs.state = AFS_LOCK_GRANTED;  in afs_do_setlk()
519 			list_move_tail(&fl->fl_u.afs.link, &vnode->granted_locks);  in afs_do_setlk()
520 			fl->fl_u.afs.state = AFS_LOCK_GRANTED;  in afs_do_setlk()
526 	    !(fl->c.flc_flags & FL_SLEEP)) {  in afs_do_setlk()
549 	trace_afs_flock_ev(vnode, fl, afs_flock_try_to_lock, 0);  in afs_do_setlk()
564 		fl->fl_u.afs.state = ret;  in afs_do_setlk()
565 		trace_afs_flock_ev(vnode, fl, afs_flock_fail_perm, ret);  in afs_do_setlk()
566 		list_del_init(&fl->fl_u.afs.link);  in afs_do_setlk()
571 		fl->fl_u.afs.state = ret;  in afs_do_setlk()
572 		trace_afs_flock_ev(vnode, fl, afs_flock_fail_other, ret);  in afs_do_setlk()
573 		list_del_init(&fl->fl_u.afs.link);  in afs_do_setlk()
578 		fl->fl_u.afs.state = ret;  in afs_do_setlk()
579 		trace_afs_flock_ev(vnode, fl, afs_flock_fail_other, ret);  in afs_do_setlk()
580 		list_del_init(&fl->fl_u.afs.link);  in afs_do_setlk()
590 		ASSERTCMP(vnode->pending_locks.next, ==, &fl->fl_u.afs.link);  in afs_do_setlk()
595 		trace_afs_flock_ev(vnode, fl, afs_flock_acquired, type);  in afs_do_setlk()
604 	ASSERTCMP(fl->fl_u.afs.state, ==, AFS_LOCK_GRANTED);  in afs_do_setlk()
608 	trace_afs_flock_ev(vnode, fl, afs_flock_vfs_locking, 0);  in afs_do_setlk()
609 	ret = locks_lock_file_wait(file, fl);  in afs_do_setlk()
610 	trace_afs_flock_ev(vnode, fl, afs_flock_vfs_lock, ret);  in afs_do_setlk()
623 	if (!(fl->c.flc_flags & FL_SLEEP)) {  in afs_do_setlk()
624 		list_del_init(&fl->fl_u.afs.link);  in afs_do_setlk()
631 	trace_afs_flock_ev(vnode, fl, afs_flock_would_block, ret);  in afs_do_setlk()
642 	trace_afs_flock_ev(vnode, fl, afs_flock_waiting, 0);  in afs_do_setlk()
643 	ret = wait_event_interruptible(fl->c.flc_wait,  in afs_do_setlk()
644 				       fl->fl_u.afs.state != AFS_LOCK_PENDING);  in afs_do_setlk()
645 	trace_afs_flock_ev(vnode, fl, afs_flock_waited, ret);  in afs_do_setlk()
647 	if (fl->fl_u.afs.state >= 0 && fl->fl_u.afs.state != AFS_LOCK_GRANTED) {  in afs_do_setlk()
650 		switch (fl->fl_u.afs.state) {  in afs_do_setlk()
652 			fl->fl_u.afs.state = AFS_LOCK_PENDING;  in afs_do_setlk()
662 				fl->fl_u.afs.state = AFS_LOCK_PENDING;  in afs_do_setlk()
674 	if (fl->fl_u.afs.state == AFS_LOCK_GRANTED)  in afs_do_setlk()
676 	ret = fl->fl_u.afs.state;  in afs_do_setlk()
688 	list_del_init(&fl->fl_u.afs.link);  in afs_do_setlk()
701 static int afs_do_unlk(struct file *file, struct file_lock *fl)  in afs_do_unlk()  argument
707 	       fl->c.flc_type);  in afs_do_unlk()
709 	trace_afs_flock_op(vnode, fl, afs_flock_op_unlock);  in afs_do_unlk()
714 	ret = locks_lock_file_wait(file, fl);  in afs_do_unlk()
722 static int afs_do_getlk(struct file *file, struct file_lock *fl)  in afs_do_getlk()  argument
733 	fl->c.flc_type = F_UNLCK;  in afs_do_getlk()
736 	posix_test_lock(file, fl);  in afs_do_getlk()
737 	if (lock_is_unlock(fl)) {  in afs_do_getlk()
746 				fl->c.flc_type = F_RDLCK;  in afs_do_getlk()
748 				fl->c.flc_type = F_WRLCK;  in afs_do_getlk()
749 			fl->fl_start = 0;  in afs_do_getlk()
750 			fl->fl_end = OFFSET_MAX;  in afs_do_getlk()
751 			fl->c.flc_pid = 0;  in afs_do_getlk()
757 	_leave(" = %d [%hd]", ret, fl->c.flc_type);  in afs_do_getlk()
764 int afs_lock(struct file *file, int cmd, struct file_lock *fl)  in afs_lock()  argument
772 	       fl->c.flc_type, fl->c.flc_flags,  in afs_lock()
773 	       (long long) fl->fl_start, (long long) fl->fl_end);  in afs_lock()
776 		return afs_do_getlk(file, fl);  in afs_lock()
778 	fl->fl_u.afs.debug_id = atomic_inc_return(&afs_file_lock_debug_id);  in afs_lock()
779 	trace_afs_flock_op(vnode, fl, afs_flock_op_lock);  in afs_lock()
781 	if (lock_is_unlock(fl))  in afs_lock()
782 		ret = afs_do_unlk(file, fl);  in afs_lock()
784 		ret = afs_do_setlk(file, fl);  in afs_lock()
792 	trace_afs_flock_op(vnode, fl, op);  in afs_lock()
799 int afs_flock(struct file *file, int cmd, struct file_lock *fl)  in afs_flock()  argument
807 	       fl->c.flc_type, fl->c.flc_flags);  in afs_flock()
816 	if (!(fl->c.flc_flags & FL_FLOCK))  in afs_flock()
819 	fl->fl_u.afs.debug_id = atomic_inc_return(&afs_file_lock_debug_id);  in afs_flock()
820 	trace_afs_flock_op(vnode, fl, afs_flock_op_flock);  in afs_flock()
823 	if (lock_is_unlock(fl))  in afs_flock()
824 		ret = afs_do_unlk(file, fl);  in afs_flock()
826 		ret = afs_do_setlk(file, fl);  in afs_flock()
834 	trace_afs_flock_op(vnode, fl, op);  in afs_flock()
844 static void afs_fl_copy_lock(struct file_lock *new, struct file_lock *fl)  in afs_fl_copy_lock()  argument
846 	struct afs_vnode *vnode = AFS_FS_I(file_inode(fl->c.flc_file));  in afs_fl_copy_lock()
854 	list_add(&new->fl_u.afs.link, &fl->fl_u.afs.link);  in afs_fl_copy_lock()
862 static void afs_fl_release_private(struct file_lock *fl)  in afs_fl_release_private()  argument
864 	struct afs_vnode *vnode = AFS_FS_I(file_inode(fl->c.flc_file));  in afs_fl_release_private()
870 	trace_afs_flock_op(vnode, fl, afs_flock_op_release_lock);  in afs_fl_release_private()
871 	list_del_init(&fl->fl_u.afs.link);  in afs_fl_release_private()