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phunix/sys/ufs/lfs/lfs_rfw.c
Lionel Sambuc 0a6a1f1d05 NetBSD re-synchronization of the source tree 
This brings our tree to NetBSD 7.0, as found on -current on the
10-10-2015.

This updates:
 - LLVM to 3.6.1
 - GCC to GCC 5.1
 - Replace minix/commands/zdump with usr.bin/zdump
 - external/bsd/libelf has moved to /external/bsd/elftoolchain/
 - Import ctwm
 - Drop sprintf from libminc

Change-Id: I149836ac18e9326be9353958bab9b266efb056f0
2016-01-13 20:32:14 +01:00

721 lines
21 KiB
C
Raw Blame History

/* $NetBSD: lfs_rfw.c,v 1.32 2015/10/03 08:27:55 dholland Exp $ */
/*-
* Copyright (c) 1999, 2000, 2001, 2002, 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.
*
* 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/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: lfs_rfw.c,v 1.32 2015/10/03 08:27:55 dholland Exp $");
#if defined(_KERNEL_OPT)
#include "opt_quota.h"
#endif
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/namei.h>
#include <sys/proc.h>
#include <sys/kernel.h>
#include <sys/vnode.h>
#include <sys/mount.h>
#include <sys/kthread.h>
#include <sys/buf.h>
#include <sys/device.h>
#include <sys/mbuf.h>
#include <sys/file.h>
#include <sys/disklabel.h>
#include <sys/ioctl.h>
#include <sys/errno.h>
#include <sys/malloc.h>
#include <sys/pool.h>
#include <sys/socket.h>
#include <sys/syslog.h>
#include <uvm/uvm_extern.h>
#include <sys/sysctl.h>
#include <sys/conf.h>
#include <sys/kauth.h>
#include <miscfs/specfs/specdev.h>
#include <ufs/lfs/ulfs_quotacommon.h>
#include <ufs/lfs/ulfs_inode.h>
#include <ufs/lfs/ulfsmount.h>
#include <ufs/lfs/ulfs_extern.h>
#include <uvm/uvm.h>
#include <uvm/uvm_stat.h>
#include <uvm/uvm_pager.h>
#include <uvm/uvm_pdaemon.h>
#include <ufs/lfs/lfs.h>
#include <ufs/lfs/lfs_accessors.h>
#include <ufs/lfs/lfs_kernel.h>
#include <ufs/lfs/lfs_extern.h>
#include <miscfs/genfs/genfs.h>
#include <miscfs/genfs/genfs_node.h>
/*
* Roll-forward code.
*/
static daddr_t check_segsum(struct lfs *, daddr_t, u_int64_t,
kauth_cred_t, int, int *, struct lwp *);
extern int lfs_do_rfw;
/*
* Allocate a particular inode with a particular version number, freeing
* any previous versions of this inode that may have gone before.
* Used by the roll-forward code.
*
* XXX this function does not have appropriate locking to be used on a live fs;
* XXX but something similar could probably be used for an "undelete" call.
*
* Called with the Ifile inode locked.
*/
int
lfs_rf_valloc(struct lfs *fs, ino_t ino, int vers, struct lwp *l,
struct vnode **vpp)
{
struct vattr va;
struct vnode *vp;
struct inode *ip;
int error;
ASSERT_SEGLOCK(fs); /* XXX it doesn't, really */
/*
* First, just try a vget. If the version number is the one we want,
* we don't have to do anything else. If the version number is wrong,
* take appropriate action.
*/
error = VFS_VGET(fs->lfs_ivnode->v_mount, ino, &vp);
if (error == 0) {
DLOG((DLOG_RF, "lfs_rf_valloc[1]: ino %d vp %p\n", ino, vp));
*vpp = vp;
ip = VTOI(vp);
if (ip->i_gen == vers)
return 0;
else if (ip->i_gen < vers) {
lfs_truncate(vp, (off_t)0, 0, NOCRED);
ip->i_gen = vers;
lfs_dino_setgen(fs, ip->i_din, vers);
LFS_SET_UINO(ip, IN_CHANGE | IN_UPDATE);
return 0;
} else {
DLOG((DLOG_RF, "ino %d: sought version %d, got %d\n",
ino, vers, lfs_dino_getgen(fs, ip->i_din)));
vput(vp);
*vpp = NULLVP;
return EEXIST;
}
}
/* Not found, create as regular file. */
vattr_null(&va);
va.va_type = VREG;
va.va_mode = 0;
va.va_fileid = ino;
va.va_gen = vers;
error = vcache_new(fs->lfs_ivnode->v_mount, NULL, &va, NOCRED, &vp);
if (error)
return error;
error = vn_lock(vp, LK_EXCLUSIVE);
if (error) {
vrele(vp);
*vpp = NULLVP;
return error;
}
ip = VTOI(vp);
ip->i_nlink = 1;
lfs_dino_setnlink(fs, ip->i_din, 1);
*vpp = vp;
return 0;
}
/*
* Load the appropriate indirect block, and change the appropriate pointer.
* Mark the block dirty. Do segment and avail accounting.
*/
static int
update_meta(struct lfs *fs, ino_t ino, int vers, daddr_t lbn,
daddr_t ndaddr, size_t size, struct lwp *l)
{
int error;
struct vnode *vp;
struct inode *ip;
#ifdef DEBUG
daddr_t odaddr;
struct indir a[ULFS_NIADDR];
int num;
int i;
#endif /* DEBUG */
struct buf *bp;
SEGUSE *sup;
KASSERT(lbn >= 0); /* no indirect blocks */
if ((error = lfs_rf_valloc(fs, ino, vers, l, &vp)) != 0) {
DLOG((DLOG_RF, "update_meta: ino %d: lfs_rf_valloc"
" returned %d\n", ino, error));
return error;
}
if ((error = lfs_balloc(vp, (lbn << lfs_sb_getbshift(fs)), size,
NOCRED, 0, &bp)) != 0) {
vput(vp);
return (error);
}
/* No need to write, the block is already on disk */
if (bp->b_oflags & BO_DELWRI) {
LFS_UNLOCK_BUF(bp);
lfs_sb_addavail(fs, lfs_btofsb(fs, bp->b_bcount));
/* XXX should this wake up fs->lfs_availsleep? */
}
brelse(bp, BC_INVAL);
/*
* Extend the file, if it is not large enough already.
* XXX this is not exactly right, we don't know how much of the
* XXX last block is actually used. We hope that an inode will
* XXX appear later to give the correct size.
*/
ip = VTOI(vp);
if (ip->i_size <= (lbn << lfs_sb_getbshift(fs))) {
u_int64_t newsize;
if (lbn < ULFS_NDADDR) {
newsize = (lbn << lfs_sb_getbshift(fs)) +
(size - lfs_sb_getfsize(fs)) + 1;
} else {
newsize = (lbn << lfs_sb_getbshift(fs)) + 1;
}
lfs_dino_setsize(fs, ip->i_din, newsize);
if (ip->i_size < newsize) {
ip->i_size = newsize;
/*
* tell vm our new size for the case the inode won't
* appear later.
*/
uvm_vnp_setsize(vp, newsize);
}
}
lfs_update_single(fs, NULL, vp, lbn, ndaddr, size);
LFS_SEGENTRY(sup, fs, lfs_dtosn(fs, ndaddr), bp);
sup->su_nbytes += size;
LFS_WRITESEGENTRY(sup, fs, lfs_dtosn(fs, ndaddr), bp);
/* differences here should be due to UNWRITTEN indirect blocks. */
KASSERT((lfs_lblkno(fs, ip->i_size) > ULFS_NDADDR &&
ip->i_lfs_effnblks == lfs_dino_getblocks(fs, ip->i_din)) ||
ip->i_lfs_effnblks >= lfs_dino_getblocks(fs, ip->i_din));
#ifdef DEBUG
/* Now look again to make sure it worked */
ulfs_bmaparray(vp, lbn, &odaddr, &a[0], &num, NULL, NULL);
for (i = num; i > 0; i--) {
if (!a[i].in_exists)
panic("update_meta: absent %d lv indirect block", i);
}
if (LFS_DBTOFSB(fs, odaddr) != ndaddr)
DLOG((DLOG_RF, "update_meta: failed setting ino %d lbn %"
PRId64 " to %" PRId64 "\n", ino, lbn, ndaddr));
#endif /* DEBUG */
vput(vp);
return 0;
}
/*
* Copy some the fields of the dinode as needed by update_inoblk().
*/
static void
update_inoblk_copy_dinode(struct lfs *fs,
union lfs_dinode *dstu, const union lfs_dinode *srcu)
{
if (fs->lfs_is64) {
struct lfs64_dinode *dst = &dstu->u_64;
const struct lfs64_dinode *src = &srcu->u_64;
unsigned i;
/*
* Copy everything but the block pointers and di_blocks.
* XXX what about di_extb?
*/
dst->di_mode = src->di_mode;
dst->di_nlink = src->di_nlink;
dst->di_uid = src->di_uid;
dst->di_gid = src->di_gid;
dst->di_blksize = src->di_blksize;
dst->di_size = src->di_size;
dst->di_atime = src->di_atime;
dst->di_mtime = src->di_mtime;
dst->di_ctime = src->di_ctime;
dst->di_birthtime = src->di_birthtime;
dst->di_mtimensec = src->di_mtimensec;
dst->di_atimensec = src->di_atimensec;
dst->di_ctimensec = src->di_ctimensec;
dst->di_birthnsec = src->di_birthnsec;
dst->di_gen = src->di_gen;
dst->di_kernflags = src->di_kernflags;
dst->di_flags = src->di_flags;
dst->di_extsize = src->di_extsize;
dst->di_modrev = src->di_modrev;
dst->di_inumber = src->di_inumber;
for (i = 0; i < __arraycount(src->di_spare); i++) {
dst->di_spare[i] = src->di_spare[i];
}
} else {
struct lfs32_dinode *dst = &dstu->u_32;
const struct lfs32_dinode *src = &srcu->u_32;
/* Get mode, link count, size, and times */
memcpy(dst, src, offsetof(struct lfs32_dinode, di_db[0]));
/* Then the rest, except di_blocks */
dst->di_flags = src->di_flags;
dst->di_gen = src->di_gen;
dst->di_uid = src->di_uid;
dst->di_gid = src->di_gid;
dst->di_modrev = src->di_modrev;
}
}
static int
update_inoblk(struct lfs *fs, daddr_t offset, kauth_cred_t cred,
struct lwp *l)
{
struct vnode *devvp, *vp;
struct inode *ip;
union lfs_dinode *dip;
struct buf *dbp, *ibp;
int error;
daddr_t daddr;
IFILE *ifp;
SEGUSE *sup;
unsigned i, num;
devvp = VTOI(fs->lfs_ivnode)->i_devvp;
/*
* Get the inode, update times and perms.
* DO NOT update disk blocks, we do that separately.
*/
error = bread(devvp, LFS_FSBTODB(fs, offset), lfs_sb_getibsize(fs),
0, &dbp);
if (error) {
DLOG((DLOG_RF, "update_inoblk: bread returned %d\n", error));
return error;
}
num = LFS_INOPB(fs);
for (i = num; i-- > 0; ) {
dip = DINO_IN_BLOCK(fs, dbp->b_data, i);
if (lfs_dino_getinumber(fs, dip) > LFS_IFILE_INUM) {
error = lfs_rf_valloc(fs, lfs_dino_getinumber(fs, dip),
lfs_dino_getgen(fs, dip),
l, &vp);
if (error) {
DLOG((DLOG_RF, "update_inoblk: lfs_rf_valloc"
" returned %d\n", error));
continue;
}
ip = VTOI(vp);
if (lfs_dino_getsize(fs, dip) != ip->i_size)
lfs_truncate(vp, lfs_dino_getsize(fs, dip), 0,
NOCRED);
update_inoblk_copy_dinode(fs, ip->i_din, dip);
ip->i_flags = lfs_dino_getflags(fs, dip);
ip->i_gen = lfs_dino_getgen(fs, dip);
ip->i_uid = lfs_dino_getuid(fs, dip);
ip->i_gid = lfs_dino_getgid(fs, dip);
ip->i_mode = lfs_dino_getmode(fs, dip);
ip->i_nlink = lfs_dino_getnlink(fs, dip);
ip->i_size = lfs_dino_getsize(fs, dip);
LFS_SET_UINO(ip, IN_CHANGE | IN_UPDATE);
/* Re-initialize to get type right */
ulfs_vinit(vp->v_mount, lfs_specop_p, lfs_fifoop_p,
&vp);
vput(vp);
/* Record change in location */
LFS_IENTRY(ifp, fs, lfs_dino_getinumber(fs, dip), ibp);
daddr = lfs_if_getdaddr(fs, ifp);
lfs_if_setdaddr(fs, ifp, LFS_DBTOFSB(fs, dbp->b_blkno));
error = LFS_BWRITE_LOG(ibp); /* Ifile */
/* And do segment accounting */
if (lfs_dtosn(fs, daddr) != lfs_dtosn(fs, LFS_DBTOFSB(fs, dbp->b_blkno))) {
if (daddr > 0) {
LFS_SEGENTRY(sup, fs, lfs_dtosn(fs, daddr),
ibp);
sup->su_nbytes -= DINOSIZE(fs);
LFS_WRITESEGENTRY(sup, fs,
lfs_dtosn(fs, daddr),
ibp);
}
LFS_SEGENTRY(sup, fs, lfs_dtosn(fs, LFS_DBTOFSB(fs, dbp->b_blkno)),
ibp);
sup->su_nbytes += DINOSIZE(fs);
LFS_WRITESEGENTRY(sup, fs,
lfs_dtosn(fs, LFS_DBTOFSB(fs, dbp->b_blkno)),
ibp);
}
}
}
brelse(dbp, BC_AGE);
return 0;
}
#define CHECK_CKSUM 0x0001 /* Check the checksum to make sure it's valid */
#define CHECK_UPDATE 0x0002 /* Update Ifile for new data blocks / inodes */
static daddr_t
check_segsum(struct lfs *fs, daddr_t offset, u_int64_t nextserial,
kauth_cred_t cred, int flags, int *pseg_flags, struct lwp *l)
{
struct vnode *devvp;
struct buf *bp, *dbp;
int error, nblocks = 0, ninos, i, j; /* XXX: gcc */
SEGSUM *ssp;
u_long *dp = NULL, *datap = NULL; /* XXX u_int32_t */
daddr_t oldoffset;
IINFO *iip;
FINFO *fip;
SEGUSE *sup;
size_t size;
uint32_t datasum, foundsum;
devvp = VTOI(fs->lfs_ivnode)->i_devvp;
/*
* If the segment has a superblock and we're at the top
* of the segment, skip the superblock.
*/
if (lfs_sntod(fs, lfs_dtosn(fs, offset)) == offset) {
LFS_SEGENTRY(sup, fs, lfs_dtosn(fs, offset), bp);
if (sup->su_flags & SEGUSE_SUPERBLOCK)
offset += lfs_btofsb(fs, LFS_SBPAD);
brelse(bp, 0);
}
/* Read in the segment summary */
error = bread(devvp, LFS_FSBTODB(fs, offset), lfs_sb_getsumsize(fs),
0, &bp);
if (error)
return -1;
/* Check summary checksum */
ssp = (SEGSUM *)bp->b_data;
if (flags & CHECK_CKSUM) {
size_t sumstart;
sumstart = lfs_ss_getsumstart(fs);
if (lfs_ss_getsumsum(fs, ssp) !=
cksum((char *)ssp + sumstart,
lfs_sb_getsumsize(fs) - sumstart)) {
DLOG((DLOG_RF, "Sumsum error at 0x%" PRIx64 "\n", offset));
offset = -1;
goto err1;
}
if (lfs_ss_getnfinfo(fs, ssp) == 0 &&
lfs_ss_getninos(fs, ssp) == 0) {
DLOG((DLOG_RF, "Empty pseg at 0x%" PRIx64 "\n", offset));
offset = -1;
goto err1;
}
if (lfs_ss_getcreate(fs, ssp) < lfs_sb_gettstamp(fs)) {
DLOG((DLOG_RF, "Old data at 0x%" PRIx64 "\n", offset));
offset = -1;
goto err1;
}
}
if (lfs_sb_getversion(fs) > 1) {
if (lfs_ss_getserial(fs, ssp) != nextserial) {
DLOG((DLOG_RF, "Unexpected serial number at 0x%" PRIx64
"\n", offset));
offset = -1;
goto err1;
}
if (lfs_ss_getident(fs, ssp) != lfs_sb_getident(fs)) {
DLOG((DLOG_RF, "Incorrect fsid (0x%x vs 0x%x) at 0x%"
PRIx64 "\n", lfs_ss_getident(fs, ssp),
lfs_sb_getident(fs), offset));
offset = -1;
goto err1;
}
}
if (pseg_flags)
*pseg_flags = lfs_ss_getflags(fs, ssp);
oldoffset = offset;
offset += lfs_btofsb(fs, lfs_sb_getsumsize(fs));
ninos = howmany(lfs_ss_getninos(fs, ssp), LFS_INOPB(fs));
iip = SEGSUM_IINFOSTART(fs, bp->b_data);
if (flags & CHECK_CKSUM) {
/* Count blocks */
nblocks = 0;
fip = SEGSUM_FINFOBASE(fs, (SEGSUM *)bp->b_data);
for (i = 0; i < lfs_ss_getnfinfo(fs, ssp); ++i) {
nblocks += lfs_fi_getnblocks(fs, fip);
if (lfs_fi_getnblocks(fs, fip) <= 0)
break;
fip = NEXT_FINFO(fs, fip);
}
nblocks += ninos;
/* Create the sum array */
datap = dp = malloc(nblocks * sizeof(u_long),
M_SEGMENT, M_WAITOK);
}
/* Handle individual blocks */
fip = SEGSUM_FINFOBASE(fs, (SEGSUM *)bp->b_data);
for (i = 0; i < lfs_ss_getnfinfo(fs, ssp) || ninos; ++i) {
/* Inode block? */
if (ninos && lfs_ii_getblock(fs, iip) == offset) {
if (flags & CHECK_CKSUM) {
/* Read in the head and add to the buffer */
error = bread(devvp, LFS_FSBTODB(fs, offset), lfs_sb_getbsize(fs),
0, &dbp);
if (error) {
offset = -1;
goto err2;
}
/* XXX this can't be right, on-disk u_long? */
(*dp++) = ((u_long *)(dbp->b_data))[0];
brelse(dbp, BC_AGE);
}
if (flags & CHECK_UPDATE) {
if ((error = update_inoblk(fs, offset, cred, l))
!= 0) {
offset = -1;
goto err2;
}
}
offset += lfs_btofsb(fs, lfs_sb_getibsize(fs));
iip = NEXTLOWER_IINFO(fs, iip);
--ninos;
--i; /* compensate for ++i in loop header */
continue;
}
size = lfs_sb_getbsize(fs);
for (j = 0; j < lfs_fi_getnblocks(fs, fip); ++j) {
if (j == lfs_fi_getnblocks(fs, fip) - 1)
size = lfs_fi_getlastlength(fs, fip);
if (flags & CHECK_CKSUM) {
error = bread(devvp, LFS_FSBTODB(fs, offset), size,
0, &dbp);
if (error) {
offset = -1;
goto err2;
}
(*dp++) = ((u_long *)(dbp->b_data))[0];
brelse(dbp, BC_AGE);
}
/* Account for and update any direct blocks */
if ((flags & CHECK_UPDATE) &&
lfs_fi_getino(fs, fip) > LFS_IFILE_INUM &&
lfs_fi_getblock(fs, fip, j) >= 0) {
update_meta(fs, lfs_fi_getino(fs, fip),
lfs_fi_getversion(fs, fip),
lfs_fi_getblock(fs, fip, j),
offset, size, l);
}
offset += lfs_btofsb(fs, size);
}
fip = NEXT_FINFO(fs, fip);
}
/* Checksum the array, compare */
datasum = lfs_ss_getdatasum(fs, ssp);
foundsum = cksum(datap, nblocks * sizeof(u_long));
if ((flags & CHECK_CKSUM) && datasum != foundsum) {
DLOG((DLOG_RF, "Datasum error at 0x%" PRIx64
" (wanted %x got %x)\n",
offset, datasum, foundsum));
offset = -1;
goto err2;
}
/* If we're at the end of the segment, move to the next */
if (lfs_dtosn(fs, offset + lfs_btofsb(fs, lfs_sb_getsumsize(fs) + lfs_sb_getbsize(fs))) !=
lfs_dtosn(fs, offset)) {
if (lfs_dtosn(fs, offset) == lfs_dtosn(fs, lfs_ss_getnext(fs, ssp))) {
offset = -1;
goto err2;
}
offset = lfs_ss_getnext(fs, ssp);
DLOG((DLOG_RF, "LFS roll forward: moving to offset 0x%" PRIx64
" -> segment %d\n", offset, lfs_dtosn(fs,offset)));
}
if (flags & CHECK_UPDATE) {
lfs_sb_subavail(fs, offset - oldoffset);
/* Don't clog the buffer queue */
mutex_enter(&lfs_lock);
if (locked_queue_count > LFS_MAX_BUFS ||
locked_queue_bytes > LFS_MAX_BYTES) {
lfs_flush(fs, SEGM_CKP, 0);
}
mutex_exit(&lfs_lock);
}
err2:
if (flags & CHECK_CKSUM)
free(datap, M_SEGMENT);
err1:
brelse(bp, BC_AGE);
/* XXX should we update the serial number even for bad psegs? */
if ((flags & CHECK_UPDATE) && offset > 0 && lfs_sb_getversion(fs) > 1)
lfs_sb_setserial(fs, nextserial);
return offset;
}
void
lfs_roll_forward(struct lfs *fs, struct mount *mp, struct lwp *l)
{
int flags, dirty;
daddr_t offset, oldoffset, lastgoodpseg;
int sn, curseg, do_rollforward;
struct proc *p;
kauth_cred_t cred;
SEGUSE *sup;
struct buf *bp;
p = l ? l->l_proc : NULL;
cred = p ? p->p_cred : NOCRED;
/*
* Roll forward.
*
* We don't roll forward for v1 filesystems, because
* of the danger that the clock was turned back between the last
* checkpoint and crash. This would roll forward garbage.
*
* v2 filesystems don't have this problem because they use a
* monotonically increasing serial number instead of a timestamp.
*/
do_rollforward = (!(lfs_sb_getpflags(fs) & LFS_PF_CLEAN) &&
lfs_do_rfw && lfs_sb_getversion(fs) > 1 && p != NULL);
if (do_rollforward) {
u_int64_t nextserial;
/*
* Phase I: Find the address of the last good partial
* segment that was written after the checkpoint. Mark
* the segments in question dirty, so they won't be
* reallocated.
*/
lastgoodpseg = oldoffset = offset = lfs_sb_getoffset(fs);
flags = 0x0;
DLOG((DLOG_RF, "LFS roll forward phase 1: start at offset 0x%"
PRIx64 "\n", offset));
LFS_SEGENTRY(sup, fs, lfs_dtosn(fs, offset), bp);
if (!(sup->su_flags & SEGUSE_DIRTY))
lfs_sb_subnclean(fs, 1);
sup->su_flags |= SEGUSE_DIRTY;
LFS_WRITESEGENTRY(sup, fs, lfs_dtosn(fs, offset), bp);
nextserial = lfs_sb_getserial(fs) + 1;
while ((offset = check_segsum(fs, offset, nextserial,
cred, CHECK_CKSUM, &flags, l)) > 0) {
nextserial++;
if (lfs_sntod(fs, oldoffset) != lfs_sntod(fs, offset)) {
LFS_SEGENTRY(sup, fs, lfs_dtosn(fs, oldoffset),
bp);
if (!(sup->su_flags & SEGUSE_DIRTY))
lfs_sb_subnclean(fs, 1);
sup->su_flags |= SEGUSE_DIRTY;
LFS_WRITESEGENTRY(sup, fs, lfs_dtosn(fs, oldoffset),
bp);
}
DLOG((DLOG_RF, "LFS roll forward phase 1: offset=0x%"
PRIx64 "\n", offset));
if (flags & SS_DIROP) {
DLOG((DLOG_RF, "lfs_mountfs: dirops at 0x%"
PRIx64 "\n", oldoffset));
if (!(flags & SS_CONT)) {
DLOG((DLOG_RF, "lfs_mountfs: dirops end "
"at 0x%" PRIx64 "\n", oldoffset));
}
}
if (!(flags & SS_CONT))
lastgoodpseg = offset;
oldoffset = offset;
}
if (flags & SS_CONT) {
DLOG((DLOG_RF, "LFS roll forward: warning: incomplete "
"dirops discarded\n"));
}
DLOG((DLOG_RF, "LFS roll forward phase 1: completed: "
"lastgoodpseg=0x%" PRIx64 "\n", lastgoodpseg));
oldoffset = lfs_sb_getoffset(fs);
if (lfs_sb_getoffset(fs) != lastgoodpseg) {
/* Don't overwrite what we're trying to preserve */
offset = lfs_sb_getoffset(fs);
lfs_sb_setoffset(fs, lastgoodpseg);
lfs_sb_setcurseg(fs, lfs_sntod(fs, lfs_dtosn(fs, lfs_sb_getoffset(fs))));
for (sn = curseg = lfs_dtosn(fs, lfs_sb_getcurseg(fs));;) {
sn = (sn + 1) % lfs_sb_getnseg(fs);
if (sn == curseg)
panic("lfs_mountfs: no clean segments");
LFS_SEGENTRY(sup, fs, sn, bp);
dirty = (sup->su_flags & SEGUSE_DIRTY);
brelse(bp, 0);
if (!dirty)
break;
}
lfs_sb_setnextseg(fs, lfs_sntod(fs, sn));
/*
* Phase II: Roll forward from the first superblock.
*/
while (offset != lastgoodpseg) {
DLOG((DLOG_RF, "LFS roll forward phase 2: 0x%"
PRIx64 "\n", offset));
offset = check_segsum(fs, offset,
lfs_sb_getserial(fs) + 1, cred, CHECK_UPDATE,
NULL, l);
}
/*
* Finish: flush our changes to disk.
*/
lfs_segwrite(mp, SEGM_CKP | SEGM_SYNC);
DLOG((DLOG_RF, "lfs_mountfs: roll forward ",
"recovered %jd blocks\n",
(intmax_t)(lastgoodpseg - oldoffset)));
}
DLOG((DLOG_RF, "LFS roll forward complete\n"));
}
}
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