/*- * Copyright (c) 2010-2012 Semihalf. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include <sys/cdefs.h> __FBSDID("$FreeBSD$"); #include <sys/param.h> #include <sys/systm.h> #include <sys/conf.h> #include <sys/kernel.h> #include <sys/lock.h> #include <sys/malloc.h> #include <sys/mount.h> #include <sys/mutex.h> #include <sys/buf.h> #include <sys/namei.h> #include <sys/vnode.h> #include <sys/bio.h> #include <fs/nandfs/nandfs_mount.h> #include <fs/nandfs/nandfs.h> #include <fs/nandfs/nandfs_subr.h> struct buf * nandfs_geteblk(int size, int flags) { struct buf *bp; /* * XXX * Right now we can call geteblk with GB_NOWAIT_BD flag, which means * it can return NULL. But we cannot afford to get NULL, hence this panic. */ bp = geteblk(size, flags); if (bp == NULL) panic("geteblk returned NULL"); return (bp); } void nandfs_dirty_bufs_increment(struct nandfs_device *fsdev) { mtx_lock(&fsdev->nd_mutex); KASSERT(fsdev->nd_dirty_bufs >= 0, ("negative nd_dirty_bufs")); fsdev->nd_dirty_bufs++; mtx_unlock(&fsdev->nd_mutex); } void nandfs_dirty_bufs_decrement(struct nandfs_device *fsdev) { mtx_lock(&fsdev->nd_mutex); KASSERT(fsdev->nd_dirty_bufs > 0, ("decrementing not-positive nd_dirty_bufs")); fsdev->nd_dirty_bufs--; mtx_unlock(&fsdev->nd_mutex); } |