1235537Sgber/*- 2235537Sgber * Copyright (c) 2010-2012 Semihalf. 3235537Sgber * All rights reserved. 4235537Sgber * 5235537Sgber * Redistribution and use in source and binary forms, with or without 6235537Sgber * modification, are permitted provided that the following conditions 7235537Sgber * are met: 8235537Sgber * 1. Redistributions of source code must retain the above copyright 9235537Sgber * notice, this list of conditions and the following disclaimer. 10235537Sgber * 2. Redistributions in binary form must reproduce the above copyright 11235537Sgber * notice, this list of conditions and the following disclaimer in the 12235537Sgber * documentation and/or other materials provided with the distribution. 13235537Sgber * 14235537Sgber * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15235537Sgber * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16235537Sgber * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17235537Sgber * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18235537Sgber * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19235537Sgber * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20235537Sgber * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21235537Sgber * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22235537Sgber * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23235537Sgber * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24235537Sgber * SUCH DAMAGE. 25235537Sgber */ 26235537Sgber 27235537Sgber#include <sys/cdefs.h> 28235537Sgber__FBSDID("$FreeBSD$"); 29235537Sgber 30235537Sgber#include <sys/param.h> 31235537Sgber#include <sys/systm.h> 32235537Sgber#include <sys/conf.h> 33235537Sgber#include <sys/kernel.h> 34235537Sgber#include <sys/lock.h> 35235537Sgber#include <sys/malloc.h> 36235537Sgber#include <sys/mount.h> 37235537Sgber#include <sys/mutex.h> 38235537Sgber#include <sys/buf.h> 39235537Sgber#include <sys/namei.h> 40235537Sgber#include <sys/vnode.h> 41235537Sgber#include <sys/bio.h> 42235537Sgber 43235537Sgber#include <fs/nandfs/nandfs_mount.h> 44235537Sgber#include <fs/nandfs/nandfs.h> 45235537Sgber#include <fs/nandfs/nandfs_subr.h> 46235537Sgber 47235537Sgberstruct buf * 48235537Sgbernandfs_geteblk(int size, int flags) 49235537Sgber{ 50235537Sgber struct buf *bp; 51235537Sgber 52235537Sgber /* 53235537Sgber * XXX 54235537Sgber * Right now we can call geteblk with GB_NOWAIT_BD flag, which means 55235537Sgber * it can return NULL. But we cannot afford to get NULL, hence this panic. 56235537Sgber */ 57235537Sgber bp = geteblk(size, flags); 58235537Sgber if (bp == NULL) 59235537Sgber panic("geteblk returned NULL"); 60235537Sgber 61235537Sgber return (bp); 62235537Sgber} 63235537Sgber 64235537Sgbervoid 65235537Sgbernandfs_dirty_bufs_increment(struct nandfs_device *fsdev) 66235537Sgber{ 67235537Sgber 68235537Sgber mtx_lock(&fsdev->nd_mutex); 69235537Sgber KASSERT(fsdev->nd_dirty_bufs >= 0, ("negative nd_dirty_bufs")); 70235537Sgber fsdev->nd_dirty_bufs++; 71235537Sgber mtx_unlock(&fsdev->nd_mutex); 72235537Sgber} 73235537Sgber 74235537Sgbervoid 75235537Sgbernandfs_dirty_bufs_decrement(struct nandfs_device *fsdev) 76235537Sgber{ 77235537Sgber 78235537Sgber mtx_lock(&fsdev->nd_mutex); 79235537Sgber KASSERT(fsdev->nd_dirty_bufs > 0, 80235537Sgber ("decrementing not-positive nd_dirty_bufs")); 81235537Sgber fsdev->nd_dirty_bufs--; 82235537Sgber mtx_unlock(&fsdev->nd_mutex); 83235537Sgber} 84