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113db2dddb
brings in support for an optional intent log which eliminates the need for background fsck on unclean shutdown. Sponsored by: iXsystems, Yahoo!, and Juniper. With help from: McKusick and Peter Holm
510 lines
13 KiB
C
510 lines
13 KiB
C
/*-
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* Copyright (c) 2006 Pawel Jakub Dawidek <pjd@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* Copyright (c) 1982, 1986, 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/disklabel.h>
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#include <sys/mount.h>
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#include <sys/stat.h>
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#include <ufs/ufs/ufsmount.h>
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#include <ufs/ufs/dinode.h>
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#include <ufs/ffs/fs.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <libufs.h>
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#include <strings.h>
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#include <err.h>
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#include <assert.h>
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#include "fsck.h"
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struct cgchain {
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union {
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struct cg cgcu_cg;
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char cgcu_buf[MAXBSIZE];
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} cgc_union;
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int cgc_busy;
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int cgc_dirty;
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LIST_ENTRY(cgchain) cgc_next;
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};
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#define cgc_cg cgc_union.cgcu_cg
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#define MAX_CACHED_CGS 1024
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static unsigned ncgs = 0;
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static LIST_HEAD(, cgchain) cglist = LIST_HEAD_INITIALIZER(cglist);
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static const char *devnam;
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static struct uufsd *disk = NULL;
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static struct fs *fs = NULL;
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struct ufs2_dinode ufs2_zino;
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static void putcgs(void);
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/*
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* Return cylinder group from the cache or load it if it is not in the
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* cache yet.
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* Don't cache more than MAX_CACHED_CGS cylinder groups.
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*/
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static struct cgchain *
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getcg(int cg)
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{
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struct cgchain *cgc;
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assert(disk != NULL && fs != NULL);
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LIST_FOREACH(cgc, &cglist, cgc_next) {
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if (cgc->cgc_cg.cg_cgx == cg) {
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//printf("%s: Found cg=%d\n", __func__, cg);
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return (cgc);
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}
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}
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/*
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* Our cache is full? Let's clean it up.
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*/
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if (ncgs >= MAX_CACHED_CGS) {
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//printf("%s: Flushing CGs.\n", __func__);
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putcgs();
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}
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cgc = malloc(sizeof(*cgc));
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if (cgc == NULL) {
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/*
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* Cannot allocate memory?
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* Let's put all currently loaded and not busy cylinder groups
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* on disk and try again.
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*/
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//printf("%s: No memory, flushing CGs.\n", __func__);
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putcgs();
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cgc = malloc(sizeof(*cgc));
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if (cgc == NULL)
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err(1, "malloc(%zu)", sizeof(*cgc));
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}
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if (cgread1(disk, cg) == -1)
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err(1, "cgread1(%d)", cg);
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bcopy(&disk->d_cg, &cgc->cgc_cg, sizeof(cgc->cgc_union));
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cgc->cgc_busy = 0;
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cgc->cgc_dirty = 0;
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LIST_INSERT_HEAD(&cglist, cgc, cgc_next);
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ncgs++;
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//printf("%s: Read cg=%d\n", __func__, cg);
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return (cgc);
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}
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/*
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* Mark cylinder group as dirty - it will be written back on putcgs().
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*/
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static void
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dirtycg(struct cgchain *cgc)
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{
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cgc->cgc_dirty = 1;
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}
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/*
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* Mark cylinder group as busy - it will not be freed on putcgs().
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*/
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static void
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busycg(struct cgchain *cgc)
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{
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cgc->cgc_busy = 1;
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}
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/*
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* Unmark the given cylinder group as busy.
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*/
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static void
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unbusycg(struct cgchain *cgc)
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{
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cgc->cgc_busy = 0;
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}
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/*
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* Write back all dirty cylinder groups.
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* Free all non-busy cylinder groups.
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*/
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static void
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putcgs(void)
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{
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struct cgchain *cgc, *cgc2;
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assert(disk != NULL && fs != NULL);
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LIST_FOREACH_SAFE(cgc, &cglist, cgc_next, cgc2) {
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if (cgc->cgc_busy)
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continue;
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LIST_REMOVE(cgc, cgc_next);
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ncgs--;
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if (cgc->cgc_dirty) {
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bcopy(&cgc->cgc_cg, &disk->d_cg,
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sizeof(cgc->cgc_union));
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if (cgwrite1(disk, cgc->cgc_cg.cg_cgx) == -1)
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err(1, "cgwrite1(%d)", cgc->cgc_cg.cg_cgx);
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//printf("%s: Wrote cg=%d\n", __func__,
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// cgc->cgc_cg.cg_cgx);
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}
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free(cgc);
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}
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}
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#if 0
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/*
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* Free all non-busy cylinder groups without storing the dirty ones.
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*/
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static void
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cancelcgs(void)
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{
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struct cgchain *cgc;
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assert(disk != NULL && fs != NULL);
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while ((cgc = LIST_FIRST(&cglist)) != NULL) {
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if (cgc->cgc_busy)
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continue;
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LIST_REMOVE(cgc, cgc_next);
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//printf("%s: Canceled cg=%d\n", __func__, cgc->cgc_cg.cg_cgx);
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free(cgc);
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}
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}
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#endif
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/*
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* Open the given provider, load superblock.
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*/
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static void
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opendisk(void)
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{
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if (disk != NULL)
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return;
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disk = malloc(sizeof(*disk));
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if (disk == NULL)
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err(1, "malloc(%zu)", sizeof(*disk));
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if (ufs_disk_fillout(disk, devnam) == -1) {
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err(1, "ufs_disk_fillout(%s) failed: %s", devnam,
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disk->d_error);
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}
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fs = &disk->d_fs;
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}
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/*
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* Mark file system as clean, write the super-block back, close the disk.
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*/
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static void
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closedisk(void)
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{
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fs->fs_clean = 1;
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if (sbwrite(disk, 0) == -1)
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err(1, "sbwrite(%s)", devnam);
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if (ufs_disk_close(disk) == -1)
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err(1, "ufs_disk_close(%s)", devnam);
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free(disk);
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disk = NULL;
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fs = NULL;
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}
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static void
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blkfree(ufs2_daddr_t bno, long size)
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{
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struct cgchain *cgc;
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struct cg *cgp;
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ufs1_daddr_t fragno, cgbno;
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int i, cg, blk, frags, bbase;
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u_int8_t *blksfree;
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cg = dtog(fs, bno);
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cgc = getcg(cg);
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dirtycg(cgc);
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cgp = &cgc->cgc_cg;
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cgbno = dtogd(fs, bno);
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blksfree = cg_blksfree(cgp);
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if (size == fs->fs_bsize) {
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fragno = fragstoblks(fs, cgbno);
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if (!ffs_isfreeblock(fs, blksfree, fragno))
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assert(!"blkfree: freeing free block");
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ffs_setblock(fs, blksfree, fragno);
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ffs_clusteracct(fs, cgp, fragno, 1);
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cgp->cg_cs.cs_nbfree++;
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fs->fs_cstotal.cs_nbfree++;
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fs->fs_cs(fs, cg).cs_nbfree++;
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} else {
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bbase = cgbno - fragnum(fs, cgbno);
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/*
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* decrement the counts associated with the old frags
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*/
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blk = blkmap(fs, blksfree, bbase);
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ffs_fragacct(fs, blk, cgp->cg_frsum, -1);
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/*
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* deallocate the fragment
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*/
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frags = numfrags(fs, size);
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for (i = 0; i < frags; i++) {
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if (isset(blksfree, cgbno + i))
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assert(!"blkfree: freeing free frag");
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setbit(blksfree, cgbno + i);
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}
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cgp->cg_cs.cs_nffree += i;
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fs->fs_cstotal.cs_nffree += i;
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fs->fs_cs(fs, cg).cs_nffree += i;
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/*
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* add back in counts associated with the new frags
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*/
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blk = blkmap(fs, blksfree, bbase);
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ffs_fragacct(fs, blk, cgp->cg_frsum, 1);
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/*
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* if a complete block has been reassembled, account for it
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*/
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fragno = fragstoblks(fs, bbase);
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if (ffs_isblock(fs, blksfree, fragno)) {
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cgp->cg_cs.cs_nffree -= fs->fs_frag;
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fs->fs_cstotal.cs_nffree -= fs->fs_frag;
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fs->fs_cs(fs, cg).cs_nffree -= fs->fs_frag;
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ffs_clusteracct(fs, cgp, fragno, 1);
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cgp->cg_cs.cs_nbfree++;
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fs->fs_cstotal.cs_nbfree++;
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fs->fs_cs(fs, cg).cs_nbfree++;
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}
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}
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}
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/*
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* Recursively free all indirect blocks.
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*/
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static void
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freeindir(ufs2_daddr_t blk, int level)
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{
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char sblks[MAXBSIZE];
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ufs2_daddr_t *blks;
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int i;
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if (bread(disk, fsbtodb(fs, blk), (void *)&sblks, (size_t)fs->fs_bsize) == -1)
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err(1, "bread: %s", disk->d_error);
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blks = (ufs2_daddr_t *)&sblks;
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for (i = 0; i < NINDIR(fs); i++) {
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if (blks[i] == 0)
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break;
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if (level == 0)
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blkfree(blks[i], fs->fs_bsize);
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else
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freeindir(blks[i], level - 1);
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}
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blkfree(blk, fs->fs_bsize);
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}
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#define dblksize(fs, dino, lbn) \
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((dino)->di_size >= smalllblktosize(fs, (lbn) + 1) \
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? (fs)->fs_bsize \
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: fragroundup(fs, blkoff(fs, (dino)->di_size)))
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/*
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* Free all blocks associated with the given inode.
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*/
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static void
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clear_inode(struct ufs2_dinode *dino)
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{
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ufs2_daddr_t bn;
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int extblocks, i, level;
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off_t osize;
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long bsize;
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extblocks = 0;
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if (fs->fs_magic == FS_UFS2_MAGIC && dino->di_extsize > 0)
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extblocks = btodb(fragroundup(fs, dino->di_extsize));
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/* deallocate external attributes blocks */
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if (extblocks > 0) {
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osize = dino->di_extsize;
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dino->di_blocks -= extblocks;
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dino->di_extsize = 0;
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for (i = 0; i < NXADDR; i++) {
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if (dino->di_extb[i] == 0)
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continue;
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blkfree(dino->di_extb[i], sblksize(fs, osize, i));
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}
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}
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#define SINGLE 0 /* index of single indirect block */
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#define DOUBLE 1 /* index of double indirect block */
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#define TRIPLE 2 /* index of triple indirect block */
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/* deallocate indirect blocks */
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for (level = SINGLE; level <= TRIPLE; level++) {
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if (dino->di_ib[level] == 0)
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break;
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freeindir(dino->di_ib[level], level);
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}
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/* deallocate direct blocks and fragments */
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for (i = 0; i < NDADDR; i++) {
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bn = dino->di_db[i];
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if (bn == 0)
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continue;
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bsize = dblksize(fs, dino, i);
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blkfree(bn, bsize);
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}
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}
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void
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gjournal_check(const char *filesys)
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{
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struct ufs2_dinode *dino;
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void *p;
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struct cgchain *cgc;
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struct cg *cgp;
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uint8_t *inosused, *blksfree;
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ino_t cino, ino;
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int cg, mode;
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devnam = filesys;
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opendisk();
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/* Are there any unreferenced inodes in this file system? */
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if (fs->fs_unrefs == 0) {
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//printf("No unreferenced inodes.\n");
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closedisk();
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return;
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}
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for (cg = 0; cg < fs->fs_ncg; cg++) {
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/* Show progress if requested. */
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if (got_siginfo) {
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printf("%s: phase j: cyl group %d of %d (%d%%)\n",
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cdevname, cg, fs->fs_ncg, cg * 100 / fs->fs_ncg);
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got_siginfo = 0;
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}
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if (got_sigalarm) {
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setproctitle("%s pj %d%%", cdevname,
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cg * 100 / fs->fs_ncg);
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got_sigalarm = 0;
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}
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cgc = getcg(cg);
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cgp = &cgc->cgc_cg;
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/* Are there any unreferenced inodes in this cylinder group? */
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if (cgp->cg_unrefs == 0)
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continue;
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//printf("Analizing cylinder group %d (count=%d)\n", cg, cgp->cg_unrefs);
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/*
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* We are going to modify this cylinder group, so we want it to
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* be written back.
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*/
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dirtycg(cgc);
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/* We don't want it to be freed in the meantime. */
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busycg(cgc);
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inosused = cg_inosused(cgp);
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blksfree = cg_blksfree(cgp);
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/*
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* Now go through the list of all inodes in this cylinder group
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* to find unreferenced ones.
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*/
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for (cino = 0; cino < fs->fs_ipg; cino++) {
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ino = fs->fs_ipg * cg + cino;
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/* Unallocated? Skip it. */
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if (isclr(inosused, cino))
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continue;
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if (getino(disk, &p, ino, &mode) == -1)
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err(1, "getino(cg=%d ino=%d)", cg, ino);
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dino = p;
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/* Not a regular file nor directory? Skip it. */
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if (!S_ISREG(dino->di_mode) && !S_ISDIR(dino->di_mode))
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continue;
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/* Has reference(s)? Skip it. */
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if (dino->di_nlink > 0)
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continue;
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//printf("Clearing inode=%d (size=%jd)\n", ino, (intmax_t)dino->di_size);
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/* Free inode's blocks. */
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clear_inode(dino);
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/* Deallocate it. */
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clrbit(inosused, cino);
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/* Update position of last used inode. */
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if (ino < cgp->cg_irotor)
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cgp->cg_irotor = ino;
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/* Update statistics. */
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cgp->cg_cs.cs_nifree++;
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fs->fs_cs(fs, cg).cs_nifree++;
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fs->fs_cstotal.cs_nifree++;
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cgp->cg_unrefs--;
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fs->fs_unrefs--;
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/* If this is directory, update related statistics. */
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if (S_ISDIR(dino->di_mode)) {
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cgp->cg_cs.cs_ndir--;
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fs->fs_cs(fs, cg).cs_ndir--;
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fs->fs_cstotal.cs_ndir--;
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}
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/* Zero-fill the inode. */
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*dino = ufs2_zino;
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/* Write the inode back. */
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if (putino(disk) == -1)
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err(1, "putino(cg=%d ino=%d)", cg, ino);
|
|
if (cgp->cg_unrefs == 0) {
|
|
//printf("No more unreferenced inodes in cg=%d.\n", cg);
|
|
break;
|
|
}
|
|
}
|
|
/*
|
|
* We don't need this cylinder group anymore, so feel free to
|
|
* free it if needed.
|
|
*/
|
|
unbusycg(cgc);
|
|
/*
|
|
* If there are no more unreferenced inodes, there is no need to
|
|
* check other cylinder groups.
|
|
*/
|
|
if (fs->fs_unrefs == 0) {
|
|
//printf("No more unreferenced inodes (cg=%d/%d).\n", cg,
|
|
// fs->fs_ncg);
|
|
break;
|
|
}
|
|
}
|
|
/* Write back modified cylinder groups. */
|
|
putcgs();
|
|
/* Write back updated statistics and super-block. */
|
|
closedisk();
|
|
}
|