2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2010-2012 Semihalf.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
32 #include <sys/param.h>
33 #include <sys/systm.h>
35 #include <sys/kernel.h>
37 #include <sys/malloc.h>
38 #include <sys/mount.h>
39 #include <sys/mutex.h>
41 #include <sys/namei.h>
42 #include <sys/vnode.h>
45 #include <fs/nandfs/nandfs_mount.h>
46 #include <fs/nandfs/nandfs.h>
47 #include <fs/nandfs/nandfs_subr.h>
50 nandfs_geteblk(int size, int flags)
56 * Right now we can call geteblk with GB_NOWAIT_BD flag, which means
57 * it can return NULL. But we cannot afford to get NULL, hence this panic.
59 bp = geteblk(size, flags);
61 panic("geteblk returned NULL");
67 nandfs_dirty_bufs_increment(struct nandfs_device *fsdev)
70 mtx_lock(&fsdev->nd_mutex);
71 KASSERT(fsdev->nd_dirty_bufs >= 0, ("negative nd_dirty_bufs"));
72 fsdev->nd_dirty_bufs++;
73 mtx_unlock(&fsdev->nd_mutex);
77 nandfs_dirty_bufs_decrement(struct nandfs_device *fsdev)
80 mtx_lock(&fsdev->nd_mutex);
81 KASSERT(fsdev->nd_dirty_bufs > 0,
82 ("decrementing not-positive nd_dirty_bufs"));
83 fsdev->nd_dirty_bufs--;
84 mtx_unlock(&fsdev->nd_mutex);