Aren
/
NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
NetBSD/sbin/fsck_lfs/pass6.c

681 lines
18 KiB
C
Raw Blame History

/* $NetBSD: pass6.c,v 1.10 2005/09/13 04:14:17 christos Exp $ */
/*-
* Copyright (c) 2003 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Konrad E. Schroder <perseant@hhhh.org>.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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/types.h>
#include <sys/param.h>
#include <sys/time.h>
#include <sys/buf.h>
#include <sys/mount.h>
#include <ufs/ufs/ufsmount.h>
#include <ufs/ufs/inode.h>
#include <ufs/ufs/dir.h>
#define vnode uvnode
#include <ufs/lfs/lfs.h>
#undef vnode
#include <assert.h>
#include <err.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include "bufcache.h"
#include "vnode.h"
#include "lfs_user.h"
#include "segwrite.h"
#include "fsck.h"
#include "extern.h"
#include "fsutil.h"
extern u_int32_t cksum(void *, size_t);
extern u_int32_t lfs_sb_cksum(struct dlfs *);
extern ufs_daddr_t badblk;
extern SEGUSE *seg_table;
/*
* Our own copy of lfs_update_single so we can account in seg_table
* as well as the Ifile; and so we can add the blocks to their new
* segment.
*
* Change the given block's address to ndaddr, finding its previous
* location using ufs_bmaparray().
*
* Account for this change in the segment table.
*/
static void
rfw_update_single(struct uvnode *vp, daddr_t lbn, ufs_daddr_t ndaddr, int size)
{
SEGUSE *sup;
struct ubuf *bp;
struct indir a[NIADDR + 2], *ap;
struct inode *ip;
daddr_t daddr, ooff;
int num, error;
int i, bb, osize = 0, obb = 0;
u_int32_t oldsn, sn;
ip = VTOI(vp);
error = ufs_bmaparray(fs, vp, lbn, &daddr, a, &num);
if (error)
errx(1, "lfs_updatemeta: ufs_bmaparray returned %d"
" looking up lbn %" PRId64 "\n", error, lbn);
if (daddr > 0)
daddr = dbtofsb(fs, daddr);
bb = fragstofsb(fs, numfrags(fs, size));
switch (num) {
case 0:
ooff = ip->i_ffs1_db[lbn];
if (ooff <= 0)
ip->i_ffs1_blocks += bb;
else {
/* possible fragment truncation or extension */
obb = btofsb(fs, ip->i_lfs_fragsize[lbn]);
ip->i_ffs1_blocks += (bb - obb);
}
ip->i_ffs1_db[lbn] = ndaddr;
break;
case 1:
ooff = ip->i_ffs1_ib[a[0].in_off];
if (ooff <= 0)
ip->i_ffs1_blocks += bb;
ip->i_ffs1_ib[a[0].in_off] = ndaddr;
break;
default:
ap = &a[num - 1];
if (bread(vp, ap->in_lbn, fs->lfs_bsize, NULL, &bp))
errx(1, "lfs_updatemeta: bread bno %" PRId64,
ap->in_lbn);
ooff = ((ufs_daddr_t *) bp->b_data)[ap->in_off];
if (ooff <= 0)
ip->i_ffs1_blocks += bb;
((ufs_daddr_t *) bp->b_data)[ap->in_off] = ndaddr;
(void) VOP_BWRITE(bp);
}
/*
* Update segment usage information, based on old size
* and location.
*/
if (daddr > 0) {
oldsn = dtosn(fs, daddr);
if (lbn >= 0 && lbn < NDADDR)
osize = ip->i_lfs_fragsize[lbn];
else
osize = fs->lfs_bsize;
LFS_SEGENTRY(sup, fs, oldsn, bp);
seg_table[oldsn].su_nbytes -= osize;
sup->su_nbytes -= osize;
if (!(bp->b_flags & B_GATHERED))
fs->lfs_flags |= LFS_IFDIRTY;
LFS_WRITESEGENTRY(sup, fs, oldsn, bp);
for (i = 0; i < btofsb(fs, osize); i++)
clrbmap(daddr + i);
}
/* Add block to its new segment */
sn = dtosn(fs, ndaddr);
LFS_SEGENTRY(sup, fs, sn, bp);
seg_table[sn].su_nbytes += size;
sup->su_nbytes += size;
if (!(bp->b_flags & B_GATHERED))
fs->lfs_flags |= LFS_IFDIRTY;
LFS_WRITESEGENTRY(sup, fs, sn, bp);
for (i = 0; i < btofsb(fs, size); i++)
setbmap(daddr + i);
/* Check bfree accounting as well */
if (daddr <= 0) {
fs->lfs_bfree -= btofsb(fs, size);
} else if (size != osize) {
fs->lfs_bfree -= (bb - obb);
}
/*
* Now that this block has a new address, and its old
* segment no longer owns it, we can forget about its
* old size.
*/
if (lbn >= 0 && lbn < NDADDR)
ip->i_lfs_fragsize[lbn] = size;
}
/*
* Remove the vnode from the cache, including any blocks it
* may hold. Account the blocks. Finally account the removal
* of the inode from its segment.
*/
static void
remove_ino(struct uvnode *vp, ino_t ino)
{
IFILE *ifp;
SEGUSE *sup;
struct ubuf *bp, *sbp;
struct inodesc idesc;
ufs_daddr_t daddr;
int obfree;
obfree = fs->lfs_bfree;
LFS_IENTRY(ifp, fs, ino, bp);
daddr = ifp->if_daddr;
brelse(bp);
if (vp == NULL && daddr > 0) {
vp = lfs_raw_vget(fs, ino, fs->lfs_ivnode->v_fd, daddr);
}
if (daddr > 0) {
LFS_SEGENTRY(sup, fs, dtosn(fs, ifp->if_daddr), sbp);
sup->su_nbytes -= DINODE1_SIZE;
VOP_BWRITE(sbp);
seg_table[dtosn(fs, ifp->if_daddr)].su_nbytes -= DINODE1_SIZE;
}
/* Do on-disk accounting */
if (vp) {
idesc.id_number = ino;
idesc.id_func = pass4check; /* Delete dinode and blocks */
idesc.id_type = ADDR;
idesc.id_lblkno = 0;
clri(&idesc, "unknown", 2); /* XXX magic number 2 */
/* vp has been destroyed */
}
}
/*
* Use FIP records to update blocks, if the generation number matches.
*/
static void
pass6harvest(ufs_daddr_t daddr, FINFO *fip)
{
struct uvnode *vp;
int i;
size_t size;
vp = vget(fs, fip->fi_ino);
if (vp && vp != fs->lfs_ivnode &&
VTOI(vp)->i_ffs1_gen == fip->fi_version) {
for (i = 0; i < fip->fi_nblocks; i++) {
size = (i == fip->fi_nblocks - 1 ?
fip->fi_lastlength : fs->lfs_bsize);
rfw_update_single(vp, fip->fi_blocks[i], daddr, size);
daddr += btofsb(fs, size);
}
}
}
/*
* Check validity of blocks on roll-forward inodes.
*/
int
pass6check(struct inodesc * idesc)
{
int i, sn, anyout, anynew;
/* Check that the blocks do not lie within clean segments. */
anyout = anynew = 0;
for (i = 0; i < fragstofsb(fs, idesc->id_numfrags); i++) {
sn = dtosn(fs, idesc->id_blkno + i);
if (sn < 0 || sn >= fs->lfs_nseg ||
(seg_table[sn].su_flags & SEGUSE_DIRTY) == 0) {
anyout = 1;
break;
}
if (seg_table[sn].su_flags & SEGUSE_ACTIVE) {
if (sn != dtosn(fs, fs->lfs_offset) ||
idesc->id_blkno > fs->lfs_offset) {
++anynew;
}
}
if (!anynew) {
/* Clear so pass1check won't be surprised */
clrbmap(idesc->id_blkno + i);
seg_table[sn].su_nbytes -= fsbtob(fs, 1);
}
}
if (anyout) {
blkerror(idesc->id_number, "BAD", idesc->id_blkno);
if (badblk++ >= MAXBAD) {
pwarn("EXCESSIVE BAD BLKS I=%llu",
(unsigned long long)idesc->id_number);
if (preen)
pwarn(" (SKIPPING)\n");
else if (reply("CONTINUE") == 0)
err(8, "%s", "");
return (STOP);
}
}
return pass1check(idesc);
}
/*
* Give a previously allocated inode a new address; do segment
* accounting if necessary.
*
* Caller has ensured that this inode is not on the free list, so no
* free list accounting is done.
*/
static void
readdress_inode(ino_t thisino, ufs_daddr_t daddr)
{
IFILE *ifp;
SEGUSE *sup;
struct ubuf *bp;
int sn;
ufs_daddr_t odaddr;
LFS_IENTRY(ifp, fs, thisino, bp);
odaddr = ifp->if_daddr;
ifp->if_daddr = daddr;
VOP_BWRITE(bp);
sn = dtosn(fs, odaddr);
LFS_SEGENTRY(sup, fs, sn, bp);
sup->su_nbytes -= DINODE1_SIZE;
VOP_BWRITE(bp);
seg_table[sn].su_nbytes -= DINODE1_SIZE;
sn = dtosn(fs, daddr);
LFS_SEGENTRY(sup, fs, sn, bp);
sup->su_nbytes += DINODE1_SIZE;
VOP_BWRITE(bp);
seg_table[sn].su_nbytes += DINODE1_SIZE;
}
/*
* Allocate the given inode from the free list.
*/
static void
alloc_inode(ino_t thisino, ufs_daddr_t daddr)
{
ino_t ino, nextfree;
IFILE *ifp;
SEGUSE *sup;
struct ubuf *bp;
while (thisino >= maxino) {
extend_ifile(fs);
reset_maxino(((VTOI(fs->lfs_ivnode)->i_ffs1_size >>
fs->lfs_bsize) - fs->lfs_segtabsz -
fs->lfs_cleansz) * fs->lfs_ifpb);
}
LFS_IENTRY(ifp, fs, thisino, bp);
nextfree = ifp->if_nextfree;
ifp->if_nextfree = 0;
ifp->if_daddr = daddr;
VOP_BWRITE(bp);
if (fs->lfs_freehd == thisino) {
fs->lfs_freehd = nextfree;
sbdirty();
if (nextfree == 0) {
extend_ifile(fs);
reset_maxino(((VTOI(fs->lfs_ivnode)->i_ffs1_size >>
fs->lfs_bsize) - fs->lfs_segtabsz -
fs->lfs_cleansz) * fs->lfs_ifpb);
}
} else {
/* Search the free list for this inode */
ino = fs->lfs_freehd;
while (ino) {
LFS_IENTRY(ifp, fs, ino, bp);
assert(ifp->if_nextfree != ino);
if (ifp->if_nextfree == thisino) {
ifp->if_nextfree = nextfree;
VOP_BWRITE(bp);
break;
} else
ino = ifp->if_nextfree;
brelse(bp);
}
}
/* Account for new location */
LFS_SEGENTRY(sup, fs, dtosn(fs, daddr), bp);
sup->su_nbytes += DINODE1_SIZE;
VOP_BWRITE(bp);
seg_table[dtosn(fs, daddr)].su_nbytes += DINODE1_SIZE;
}
/*
* Roll forward from the last verified checkpoint.
*
* Basic strategy:
*
* Run through the summaries finding the last valid partial segment.
* Note segment numbers as we go. For each inode that we find, compare
* its generation number; if newer than old inode's (or if old inode is
* USTATE), change to that inode. Recursively look at inode blocks that
* do not have their old disk addresses. These addresses must lie in
* segments we have seen already in our roll forward.
*
* A second pass through the past-checkpoint area verifies the validity
* of these new blocks, as well as updating other blocks that do not
* have corresponding new inodes (but their generation number must match
* the old generation number).
*/
void
pass6(void)
{
ufs_daddr_t daddr, ibdaddr, odaddr, lastgood, nextseg, *idaddrp;
struct uvnode *vp, *devvp;
CLEANERINFO *cip;
SEGUSE *sup;
SEGSUM *sp;
struct ubuf *bp, *ibp, *sbp, *cbp;
struct ufs1_dinode *dp;
struct inodesc idesc;
int i, j, bc;
ufs_daddr_t hassuper;
devvp = fs->lfs_devvp;
/* Find last valid partial segment */
lastgood = try_verify(fs, devvp, 0, debug);
if (lastgood == fs->lfs_offset) {
if (debug)
pwarn("not rolling forward, nothing to recover\n");
return;
}
if (debug)
pwarn("could roll forward from %" PRIx32 " to %" PRIx32 "\n",
fs->lfs_offset, lastgood);
if (!preen && reply("roll forward") == 0)
return;
/*
* Pass 1: find inode blocks. We ignore the Ifile inode but accept
* changes to any other inode.
*/
daddr = fs->lfs_offset;
nextseg = fs->lfs_nextseg;
while (daddr != lastgood) {
seg_table[dtosn(fs, daddr)].su_flags |= SEGUSE_DIRTY | SEGUSE_ACTIVE;
LFS_SEGENTRY(sup, fs, dtosn(fs, daddr), sbp);
sup->su_flags |= SEGUSE_DIRTY;
VOP_BWRITE(sbp);
hassuper = 0;
oncemore:
/* Read in summary block */
bread(devvp, fsbtodb(fs, daddr), fs->lfs_sumsize, NULL, &bp);
sp = (SEGSUM *)bp->b_data;
/* Could be a superblock instead of a segment summary. */
if (sntod(fs, dtosn(fs, daddr)) == daddr &&
(sp->ss_magic != SS_MAGIC ||
sp->ss_sumsum != cksum(&sp->ss_datasum, fs->lfs_sumsize -
sizeof(sp->ss_sumsum)))) {
brelse(bp);
daddr += btofsb(fs, LFS_SBPAD);
hassuper = 1;
goto oncemore;
}
/* We have verified that this is a good summary. */
LFS_SEGENTRY(sup, fs, dtosn(fs, daddr), sbp);
++sup->su_nsums;
VOP_BWRITE(sbp);
fs->lfs_bfree -= btofsb(fs, fs->lfs_sumsize);
fs->lfs_dmeta += btofsb(fs, fs->lfs_sumsize);
sbdirty();
nextseg = sp->ss_next;
if (sntod(fs, dtosn(fs, daddr)) == daddr +
hassuper * btofsb(fs, LFS_SBPAD) &&
dtosn(fs, daddr) != dtosn(fs, fs->lfs_offset)) {
--fs->lfs_nclean;
sbdirty();
}
/* Find inodes, look at generation number. */
if (sp->ss_ninos) {
LFS_SEGENTRY(sup, fs, dtosn(fs, daddr), sbp);
sup->su_ninos += howmany(sp->ss_ninos, INOPB(fs));
VOP_BWRITE(sbp);
fs->lfs_dmeta += btofsb(fs, howmany(sp->ss_ninos,
INOPB(fs)) *
fs->lfs_ibsize);
}
idaddrp = ((ufs_daddr_t *)((char *)bp->b_data + fs->lfs_sumsize));
for (i = 0; i < howmany(sp->ss_ninos, INOPB(fs)); i++) {
ino_t inums[INOPB(fs) + 1];
for (j = 0; j < INOPB(fs) + 1; j++)
inums[j] = 0;
ibdaddr = *--idaddrp;
fs->lfs_bfree -= btofsb(fs, fs->lfs_ibsize);
sbdirty();
bread(devvp, fsbtodb(fs, ibdaddr), fs->lfs_ibsize,
NOCRED, &ibp);
j = 0;
for (dp = (struct ufs1_dinode *)ibp->b_data;
dp < (struct ufs1_dinode *)ibp->b_data + INOPB(fs);
++dp) {
if (dp->di_u.inumber == 0 ||
dp->di_u.inumber == fs->lfs_ifile)
continue;
/* Basic sanity checks */
if (dp->di_nlink < 0 ||
dp->di_u.inumber < 0 ||
dp->di_size < 0) {
pwarn("bad inode at %" PRIx32 "\n",
ibdaddr);
brelse(ibp);
brelse(bp);
goto out;
}
vp = vget(fs, dp->di_u.inumber);
/*
* Four cases:
* (1) Invalid inode (nlink == 0).
* If currently allocated, remove.
*/
if (dp->di_nlink == 0) {
remove_ino(vp, dp->di_u.inumber);
continue;
}
/*
* (2) New valid inode, previously free.
* Nothing to do except account
* the inode itself, done after the
* loop.
*/
if (vp == NULL) {
inums[j++] = dp->di_u.inumber;
continue;
}
/*
* (3) Valid new version of previously
* allocated inode. Delete old file
* and proceed as in (2).
*/
if (vp && VTOI(vp)->i_ffs1_gen < dp->di_gen) {
remove_ino(vp, dp->di_u.inumber);
inums[j++] = dp->di_u.inumber;
continue;
}
/*
* (4) Same version of previously
* allocated inode. Move inode to
* this location, account inode change
* only. We'll pick up any new
* blocks when we do the block pass.
*/
if (vp && VTOI(vp)->i_ffs1_gen == dp->di_gen) {
readdress_inode(dp->di_u.inumber, ibdaddr);
/* Update with new info */
VTOD(vp)->di_mode = dp->di_mode;
VTOD(vp)->di_nlink = dp->di_nlink;
/* XXX size is important */
VTOD(vp)->di_size = dp->di_size;
VTOD(vp)->di_atime = dp->di_atime;
VTOD(vp)->di_atimensec = dp->di_atimensec;
VTOD(vp)->di_mtime = dp->di_mtime;
VTOD(vp)->di_mtimensec = dp->di_mtimensec;
VTOD(vp)->di_ctime = dp->di_ctime;
VTOD(vp)->di_ctimensec = dp->di_ctimensec;
VTOD(vp)->di_flags = dp->di_flags;
VTOD(vp)->di_uid = dp->di_uid;
VTOD(vp)->di_gid = dp->di_gid;
inodirty(VTOI(vp));
}
}
brelse(ibp);
for (j = 0; inums[j]; j++) {
alloc_inode(inums[j], ibdaddr);
vp = lfs_raw_vget(fs, inums[j],
devvp->v_fd, ibdaddr);
/* We'll get the blocks later */
memset(VTOD(vp)->di_db, 0, (NDADDR + NIADDR) *
sizeof(ufs_daddr_t));
VTOD(vp)->di_blocks = 0;
vp->v_flag |= VDIROP;
inodirty(VTOI(vp));
}
}
bc = check_summary(fs, sp, daddr, debug, devvp, NULL);
if (bc == 0) {
brelse(bp);
break;
}
odaddr = daddr;
daddr += btofsb(fs, fs->lfs_sumsize + bc);
if (dtosn(fs, odaddr) != dtosn(fs, daddr) ||
dtosn(fs, daddr) != dtosn(fs, daddr +
btofsb(fs, fs->lfs_sumsize + fs->lfs_bsize))) {
daddr = ((SEGSUM *)bp->b_data)->ss_next;
}
brelse(bp);
}
out:
/*
* Check our new vnodes. Any blocks must lie in segments that
* we've seen before (SEGUSE_DIRTY or SEGUSE_RFW); and the rest
* of the pass 1 checks as well.
*/
memset(&idesc, 0, sizeof(struct inodesc));
idesc.id_type = ADDR;
idesc.id_func = pass6check;
idesc.id_lblkno = 0;
LIST_FOREACH(vp, &vnodelist, v_mntvnodes) {
if ((vp->v_flag & VDIROP) == 0)
--n_files; /* Don't double count */
checkinode(VTOI(vp)->i_number, &idesc);
}
/*
* Second pass. Run through FINFO entries looking for blocks
* with the same generation number as files we've seen before.
* If they have it, pretend like we just wrote them. We don't
* do the pretend-write, though, if we've already seen them
* (the accounting would have been done for us already).
*/
daddr = fs->lfs_offset;
while (daddr != lastgood) {
if (!(seg_table[dtosn(fs, daddr)].su_flags & SEGUSE_DIRTY)) {
seg_table[dtosn(fs, daddr)].su_flags |= SEGUSE_DIRTY;
LFS_SEGENTRY(sup, fs, dtosn(fs, daddr), sbp);
sup->su_flags |= SEGUSE_DIRTY;
VOP_BWRITE(sbp);
}
oncemore2:
/* Read in summary block */
bread(devvp, fsbtodb(fs, daddr), fs->lfs_sumsize, NULL, &bp);
sp = (SEGSUM *)bp->b_data;
/* Could be a superblock instead of a segment summary. */
if (sntod(fs, dtosn(fs, daddr)) == daddr &&
(sp->ss_magic != SS_MAGIC ||
sp->ss_sumsum != cksum(&sp->ss_datasum, fs->lfs_sumsize -
sizeof(sp->ss_sumsum)))) {
brelse(bp);
daddr += btofsb(fs, LFS_SBPAD);
goto oncemore2;
}
bc = check_summary(fs, sp, daddr, debug, devvp, pass6harvest);
if (bc == 0) {
brelse(bp);
break;
}
odaddr = daddr;
daddr += btofsb(fs, fs->lfs_sumsize + bc);
fs->lfs_avail -= btofsb(fs, fs->lfs_sumsize + bc);
if (dtosn(fs, odaddr) != dtosn(fs, daddr) ||
dtosn(fs, daddr) != dtosn(fs, daddr +
btofsb(fs, fs->lfs_sumsize + fs->lfs_bsize))) {
fs->lfs_avail -= sntod(fs, dtosn(fs, daddr) + 1) - daddr;
daddr = ((SEGSUM *)bp->b_data)->ss_next;
}
LFS_CLEANERINFO(cip, fs, cbp);
LFS_SYNC_CLEANERINFO(cip, fs, cbp, 0);
bp->b_flags |= B_AGE;
brelse(bp);
}
/* Update offset to point at correct location */
fs->lfs_offset = lastgood;
fs->lfs_curseg = sntod(fs, dtosn(fs, lastgood));
fs->lfs_nextseg = nextseg;
if (!preen) {
/* Run pass 5 again (it's quick anyway). */
pwarn("** Phase 6b - Recheck Segment Block Accounting\n");
pass5();
}
/* Likewise for pass 0 */
if (!preen)
pwarn("** Phase 6c - Recheck Inode Free List\n");
pass0();
}
Reference in New Issue View Git Blame Copy Permalink