6f7c735300
The NAND Flash environment consists of several distinct components: - NAND framework (drivers harness for NAND controllers and NAND chips) - NAND simulator (NANDsim) - NAND file system (NAND FS) - Companion tools and utilities - Documentation (manual pages) This work is still experimental. Please use with caution. Obtained from: Semihalf Supported by: FreeBSD Foundation, Juniper Networks
84 lines
2.5 KiB
C
84 lines
2.5 KiB
C
/*-
|
|
* 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);
|
|
}
|