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FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //usr/src/sbin/fsck_ffs/gjournal.c |
/*-
* Copyright (c) 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.
*
* Copyright (c) 1982, 1986, 1989, 1993
* The Regents of the University of California. 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.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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: release/9.1.0/sbin/fsck_ffs/gjournal.c 231812 2012-02-16 05:01:09Z eadler $");
#include <sys/param.h>
#include <sys/disklabel.h>
#include <sys/mount.h>
#include <sys/stat.h>
#include <ufs/ufs/ufsmount.h>
#include <ufs/ufs/dinode.h>
#include <ufs/ffs/fs.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <libufs.h>
#include <strings.h>
#include <err.h>
#include <assert.h>
#include "fsck.h"
struct cgchain {
union {
struct cg cgcu_cg;
char cgcu_buf[MAXBSIZE];
} cgc_union;
int cgc_busy;
int cgc_dirty;
LIST_ENTRY(cgchain) cgc_next;
};
#define cgc_cg cgc_union.cgcu_cg
#define MAX_CACHED_CGS 1024
static unsigned ncgs = 0;
static LIST_HEAD(, cgchain) cglist = LIST_HEAD_INITIALIZER(cglist);
static const char *devnam;
static struct uufsd *disk = NULL;
static struct fs *fs = NULL;
struct ufs2_dinode ufs2_zino;
static void putcgs(void);
/*
* Return cylinder group from the cache or load it if it is not in the
* cache yet.
* Don't cache more than MAX_CACHED_CGS cylinder groups.
*/
static struct cgchain *
getcg(int cg)
{
struct cgchain *cgc;
assert(disk != NULL && fs != NULL);
LIST_FOREACH(cgc, &cglist, cgc_next) {
if (cgc->cgc_cg.cg_cgx == cg) {
//printf("%s: Found cg=%d\n", __func__, cg);
return (cgc);
}
}
/*
* Our cache is full? Let's clean it up.
*/
if (ncgs >= MAX_CACHED_CGS) {
//printf("%s: Flushing CGs.\n", __func__);
putcgs();
}
cgc = malloc(sizeof(*cgc));
if (cgc == NULL) {
/*
* Cannot allocate memory?
* Let's put all currently loaded and not busy cylinder groups
* on disk and try again.
*/
//printf("%s: No memory, flushing CGs.\n", __func__);
putcgs();
cgc = malloc(sizeof(*cgc));
if (cgc == NULL)
err(1, "malloc(%zu)", sizeof(*cgc));
}
if (cgread1(disk, cg) == -1)
err(1, "cgread1(%d)", cg);
bcopy(&disk->d_cg, &cgc->cgc_cg, sizeof(cgc->cgc_union));
cgc->cgc_busy = 0;
cgc->cgc_dirty = 0;
LIST_INSERT_HEAD(&cglist, cgc, cgc_next);
ncgs++;
//printf("%s: Read cg=%d\n", __func__, cg);
return (cgc);
}
/*
* Mark cylinder group as dirty - it will be written back on putcgs().
*/
static void
dirtycg(struct cgchain *cgc)
{
cgc->cgc_dirty = 1;
}
/*
* Mark cylinder group as busy - it will not be freed on putcgs().
*/
static void
busycg(struct cgchain *cgc)
{
cgc->cgc_busy = 1;
}
/*
* Unmark the given cylinder group as busy.
*/
static void
unbusycg(struct cgchain *cgc)
{
cgc->cgc_busy = 0;
}
/*
* Write back all dirty cylinder groups.
* Free all non-busy cylinder groups.
*/
static void
putcgs(void)
{
struct cgchain *cgc, *cgc2;
assert(disk != NULL && fs != NULL);
LIST_FOREACH_SAFE(cgc, &cglist, cgc_next, cgc2) {
if (cgc->cgc_busy)
continue;
LIST_REMOVE(cgc, cgc_next);
ncgs--;
if (cgc->cgc_dirty) {
bcopy(&cgc->cgc_cg, &disk->d_cg,
sizeof(cgc->cgc_union));
if (cgwrite1(disk, cgc->cgc_cg.cg_cgx) == -1)
err(1, "cgwrite1(%d)", cgc->cgc_cg.cg_cgx);
//printf("%s: Wrote cg=%d\n", __func__,
// cgc->cgc_cg.cg_cgx);
}
free(cgc);
}
}
#if 0
/*
* Free all non-busy cylinder groups without storing the dirty ones.
*/
static void
cancelcgs(void)
{
struct cgchain *cgc;
assert(disk != NULL && fs != NULL);
while ((cgc = LIST_FIRST(&cglist)) != NULL) {
if (cgc->cgc_busy)
continue;
LIST_REMOVE(cgc, cgc_next);
//printf("%s: Canceled cg=%d\n", __func__, cgc->cgc_cg.cg_cgx);
free(cgc);
}
}
#endif
/*
* Open the given provider, load superblock.
*/
static void
opendisk(void)
{
if (disk != NULL)
return;
disk = malloc(sizeof(*disk));
if (disk == NULL)
err(1, "malloc(%zu)", sizeof(*disk));
if (ufs_disk_fillout(disk, devnam) == -1) {
err(1, "ufs_disk_fillout(%s) failed: %s", devnam,
disk->d_error);
}
fs = &disk->d_fs;
}
/*
* Mark file system as clean, write the super-block back, close the disk.
*/
static void
closedisk(void)
{
fs->fs_clean = 1;
if (sbwrite(disk, 0) == -1)
err(1, "sbwrite(%s)", devnam);
if (ufs_disk_close(disk) == -1)
err(1, "ufs_disk_close(%s)", devnam);
free(disk);
disk = NULL;
fs = NULL;
}
static void
blkfree(ufs2_daddr_t bno, long size)
{
struct cgchain *cgc;
struct cg *cgp;
ufs1_daddr_t fragno, cgbno;
int i, cg, blk, frags, bbase;
u_int8_t *blksfree;
cg = dtog(fs, bno);
cgc = getcg(cg);
dirtycg(cgc);
cgp = &cgc->cgc_cg;
cgbno = dtogd(fs, bno);
blksfree = cg_blksfree(cgp);
if (size == fs->fs_bsize) {
fragno = fragstoblks(fs, cgbno);
if (!ffs_isfreeblock(fs, blksfree, fragno))
assert(!"blkfree: freeing free block");
ffs_setblock(fs, blksfree, fragno);
ffs_clusteracct(fs, cgp, fragno, 1);
cgp->cg_cs.cs_nbfree++;
fs->fs_cstotal.cs_nbfree++;
fs->fs_cs(fs, cg).cs_nbfree++;
} else {
bbase = cgbno - fragnum(fs, cgbno);
/*
* decrement the counts associated with the old frags
*/
blk = blkmap(fs, blksfree, bbase);
ffs_fragacct(fs, blk, cgp->cg_frsum, -1);
/*
* deallocate the fragment
*/
frags = numfrags(fs, size);
for (i = 0; i < frags; i++) {
if (isset(blksfree, cgbno + i))
assert(!"blkfree: freeing free frag");
setbit(blksfree, cgbno + i);
}
cgp->cg_cs.cs_nffree += i;
fs->fs_cstotal.cs_nffree += i;
fs->fs_cs(fs, cg).cs_nffree += i;
/*
* add back in counts associated with the new frags
*/
blk = blkmap(fs, blksfree, bbase);
ffs_fragacct(fs, blk, cgp->cg_frsum, 1);
/*
* if a complete block has been reassembled, account for it
*/
fragno = fragstoblks(fs, bbase);
if (ffs_isblock(fs, blksfree, fragno)) {
cgp->cg_cs.cs_nffree -= fs->fs_frag;
fs->fs_cstotal.cs_nffree -= fs->fs_frag;
fs->fs_cs(fs, cg).cs_nffree -= fs->fs_frag;
ffs_clusteracct(fs, cgp, fragno, 1);
cgp->cg_cs.cs_nbfree++;
fs->fs_cstotal.cs_nbfree++;
fs->fs_cs(fs, cg).cs_nbfree++;
}
}
}
/*
* Recursively free all indirect blocks.
*/
static void
freeindir(ufs2_daddr_t blk, int level)
{
char sblks[MAXBSIZE];
ufs2_daddr_t *blks;
int i;
if (bread(disk, fsbtodb(fs, blk), (void *)&sblks, (size_t)fs->fs_bsize) == -1)
err(1, "bread: %s", disk->d_error);
blks = (ufs2_daddr_t *)&sblks;
for (i = 0; i < NINDIR(fs); i++) {
if (blks[i] == 0)
break;
if (level == 0)
blkfree(blks[i], fs->fs_bsize);
else
freeindir(blks[i], level - 1);
}
blkfree(blk, fs->fs_bsize);
}
#define dblksize(fs, dino, lbn) \
((dino)->di_size >= smalllblktosize(fs, (lbn) + 1) \
? (fs)->fs_bsize \
: fragroundup(fs, blkoff(fs, (dino)->di_size)))
/*
* Free all blocks associated with the given inode.
*/
static void
clear_inode(struct ufs2_dinode *dino)
{
ufs2_daddr_t bn;
int extblocks, i, level;
off_t osize;
long bsize;
extblocks = 0;
if (fs->fs_magic == FS_UFS2_MAGIC && dino->di_extsize > 0)
extblocks = btodb(fragroundup(fs, dino->di_extsize));
/* deallocate external attributes blocks */
if (extblocks > 0) {
osize = dino->di_extsize;
dino->di_blocks -= extblocks;
dino->di_extsize = 0;
for (i = 0; i < NXADDR; i++) {
if (dino->di_extb[i] == 0)
continue;
blkfree(dino->di_extb[i], sblksize(fs, osize, i));
}
}
#define SINGLE 0 /* index of single indirect block */
#define DOUBLE 1 /* index of double indirect block */
#define TRIPLE 2 /* index of triple indirect block */
/* deallocate indirect blocks */
for (level = SINGLE; level <= TRIPLE; level++) {
if (dino->di_ib[level] == 0)
break;
freeindir(dino->di_ib[level], level);
}
/* deallocate direct blocks and fragments */
for (i = 0; i < NDADDR; i++) {
bn = dino->di_db[i];
if (bn == 0)
continue;
bsize = dblksize(fs, dino, i);
blkfree(bn, bsize);
}
}
void
gjournal_check(const char *filesys)
{
struct ufs2_dinode *dino;
void *p;
struct cgchain *cgc;
struct cg *cgp;
uint8_t *inosused;
ino_t cino, ino;
int cg, mode;
devnam = filesys;
opendisk();
/* Are there any unreferenced inodes in this file system? */
if (fs->fs_unrefs == 0) {
//printf("No unreferenced inodes.\n");
closedisk();
return;
}
for (cg = 0; cg < fs->fs_ncg; cg++) {
/* Show progress if requested. */
if (got_siginfo) {
printf("%s: phase j: cyl group %d of %d (%d%%)\n",
cdevname, cg, fs->fs_ncg, cg * 100 / fs->fs_ncg);
got_siginfo = 0;
}
if (got_sigalarm) {
setproctitle("%s pj %d%%", cdevname,
cg * 100 / fs->fs_ncg);
got_sigalarm = 0;
}
cgc = getcg(cg);
cgp = &cgc->cgc_cg;
/* Are there any unreferenced inodes in this cylinder group? */
if (cgp->cg_unrefs == 0)
continue;
//printf("Analizing cylinder group %d (count=%d)\n", cg, cgp->cg_unrefs);
/*
* We are going to modify this cylinder group, so we want it to
* be written back.
*/
dirtycg(cgc);
/* We don't want it to be freed in the meantime. */
busycg(cgc);
inosused = cg_inosused(cgp);
/*
* Now go through the list of all inodes in this cylinder group
* to find unreferenced ones.
*/
for (cino = 0; cino < fs->fs_ipg; cino++) {
ino = fs->fs_ipg * cg + cino;
/* Unallocated? Skip it. */
if (isclr(inosused, cino))
continue;
if (getino(disk, &p, ino, &mode) == -1)
err(1, "getino(cg=%d ino=%d)", cg, ino);
dino = p;
/* Not a regular file nor directory? Skip it. */
if (!S_ISREG(dino->di_mode) && !S_ISDIR(dino->di_mode))
continue;
/* Has reference(s)? Skip it. */
if (dino->di_nlink > 0)
continue;
//printf("Clearing inode=%d (size=%jd)\n", ino, (intmax_t)dino->di_size);
/* Free inode's blocks. */
clear_inode(dino);
/* Deallocate it. */
clrbit(inosused, cino);
/* Update position of last used inode. */
if (ino < cgp->cg_irotor)
cgp->cg_irotor = ino;
/* Update statistics. */
cgp->cg_cs.cs_nifree++;
fs->fs_cs(fs, cg).cs_nifree++;
fs->fs_cstotal.cs_nifree++;
cgp->cg_unrefs--;
fs->fs_unrefs--;
/* If this is directory, update related statistics. */
if (S_ISDIR(dino->di_mode)) {
cgp->cg_cs.cs_ndir--;
fs->fs_cs(fs, cg).cs_ndir--;
fs->fs_cstotal.cs_ndir--;
}
/* Zero-fill the inode. */
*dino = ufs2_zino;
/* Write the inode back. */
if (putino(disk) == -1)
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();
}