2 * Copyright (c) 2010-2012 Semihalf.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include <sys/param.h>
31 #include <sys/systm.h>
33 #include <sys/kernel.h>
35 #include <sys/malloc.h>
36 #include <sys/mount.h>
37 #include <sys/mutex.h>
39 #include <sys/namei.h>
40 #include <sys/vnode.h>
43 #include <fs/nandfs/nandfs_mount.h>
44 #include <fs/nandfs/nandfs.h>
45 #include <fs/nandfs/nandfs_subr.h>
48 nandfs_geteblk(int size, int flags)
54 * Right now we can call geteblk with GB_NOWAIT_BD flag, which means
55 * it can return NULL. But we cannot afford to get NULL, hence this panic.
57 bp = geteblk(size, flags);
59 panic("geteblk returned NULL");
65 nandfs_dirty_bufs_increment(struct nandfs_device *fsdev)
68 mtx_lock(&fsdev->nd_mutex);
69 KASSERT(fsdev->nd_dirty_bufs >= 0, ("negative nd_dirty_bufs"));
70 fsdev->nd_dirty_bufs++;
71 mtx_unlock(&fsdev->nd_mutex);
75 nandfs_dirty_bufs_decrement(struct nandfs_device *fsdev)
78 mtx_lock(&fsdev->nd_mutex);
79 KASSERT(fsdev->nd_dirty_bufs > 0,
80 ("decrementing not-positive nd_dirty_bufs"));
81 fsdev->nd_dirty_bufs--;
82 mtx_unlock(&fsdev->nd_mutex);