freebsd-nq/sys/geom/journal/g_journal_ufs.c
Kirk McKusick 9407f25df2 Optimize g_journal's superblock update by noting that the summary
information is neither read nor written so it need not be written
out when updating the superblock.

PR:           247425
Sponsored by: Netflix
2020-06-23 21:44:00 +00:00

113 lines
3.3 KiB
C

/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2005-2006 Pawel Jakub Dawidek <pjd@FreeBSD.org>
* 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 AUTHORS 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 AUTHORS 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/vnode.h>
#include <sys/mount.h>
#include <ufs/ufs/extattr.h>
#include <ufs/ufs/quota.h>
#include <ufs/ufs/inode.h>
#include <ufs/ufs/ufs_extern.h>
#include <ufs/ufs/ufsmount.h>
#include <ufs/ffs/fs.h>
#include <ufs/ffs/ffs_extern.h>
#include <geom/geom.h>
#include <geom/geom_dbg.h>
#include <geom/journal/g_journal.h>
static int
g_journal_ufs_clean(struct mount *mp)
{
struct ufsmount *ump;
struct fs *fs;
int flags;
ump = VFSTOUFS(mp);
fs = ump->um_fs;
flags = fs->fs_flags;
fs->fs_flags &= ~(FS_UNCLEAN | FS_NEEDSFSCK);
ffs_sbupdate(ump, MNT_WAIT, 1);
fs->fs_flags = flags;
return (0);
}
static void
g_journal_ufs_dirty(struct g_consumer *cp)
{
struct fs *fs;
int error;
fs = NULL;
if (SBLOCKSIZE % cp->provider->sectorsize != 0 ||
ffs_sbget(cp, &fs, STDSB, M_GEOM, g_use_g_read_data) != 0) {
GJ_DEBUG(0, "Cannot find superblock to mark file system %s "
"as dirty.", cp->provider->name);
KASSERT(fs == NULL,
("g_journal_ufs_dirty: non-NULL fs %p\n", fs));
return;
}
/*
* Do not use or change summary information, so free it now
* to avoid unnecessarily writing it back out in ffs_sbput().
*/
g_free(fs->fs_csp);
g_free(fs->fs_si);
fs->fs_si = NULL;
GJ_DEBUG(0, "clean=%d flags=0x%x", fs->fs_clean, fs->fs_flags);
fs->fs_clean = 0;
fs->fs_flags |= FS_NEEDSFSCK | FS_UNCLEAN;
error = ffs_sbput(cp, fs, fs->fs_sblockloc, g_use_g_write_data);
g_free(fs);
if (error != 0) {
GJ_DEBUG(0, "Cannot mark file system %s as dirty "
"(error=%d).", cp->provider->name, error);
} else {
GJ_DEBUG(0, "File system %s marked as dirty.",
cp->provider->name);
}
}
const struct g_journal_desc g_journal_ufs = {
.jd_fstype = "ufs",
.jd_clean = g_journal_ufs_clean,
.jd_dirty = g_journal_ufs_dirty
};
MODULE_DEPEND(g_journal, ufs, 1, 1, 1);
MODULE_VERSION(geom_journal, 0);