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freebsd-skq/sbin/growfs/growfs.c
Kirk McKusick 1c85e6a35d This commit adds basic support for the UFS2 filesystem. The UFS2 
filesystem expands the inode to 256 bytes to make space for 64-bit
block pointers. It also adds a file-creation time field, an ability
to use jumbo blocks per inode to allow extent like pointer density,
and space for extended attributes (up to twice the filesystem block
size worth of attributes, e.g., on a 16K filesystem, there is space
for 32K of attributes). UFS2 fully supports and runs existing UFS1
filesystems. New filesystems built using newfs can be built in either
UFS1 or UFS2 format using the -O option. In this commit UFS1 is
the default format, so if you want to build UFS2 format filesystems,
you must specify -O 2. This default will be changed to UFS2 when
UFS2 proves itself to be stable. In this commit the boot code for
reading UFS2 filesystems is not compiled (see /sys/boot/common/ufsread.c)
as there is insufficient space in the boot block. Once the size of the
boot block is increased, this code can be defined.

Things to note: the definition of SBSIZE has changed to SBLOCKSIZE.
The header file <ufs/ufs/dinode.h> must be included before
<ufs/ffs/fs.h> so as to get the definitions of ufs2_daddr_t and
ufs_lbn_t.

Still TODO:
Verify that the first level bootstraps work for all the architectures.
Convert the utility ffsinfo to understand UFS2 and test growfs.
Add support for the extended attribute storage. Update soft updates
to ensure integrity of extended attribute storage. Switch the
current extended attribute interfaces to use the extended attribute
storage. Add the extent like functionality (framework is there,
but is currently never used).

Sponsored by: DARPA & NAI Labs.
Reviewed by:	Poul-Henning Kamp <phk@freebsd.org>
2002-06-21 06:18:05 +00:00

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/*
* Copyright (c) 2000 Christoph Herrmann, Thomas-Henning von Kamptz
* Copyright (c) 1980, 1989, 1993 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Christoph Herrmann and Thomas-Henning von Kamptz, Munich and Frankfurt.
*
* 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 acknowledgment:
* This product includes software developed by the University of
* California, Berkeley and its contributors, as well as Christoph
* Herrmann and Thomas-Henning von Kamptz.
* 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.
*
* $TSHeader: src/sbin/growfs/growfs.c,v 1.5 2000/12/12 19:31:00 tomsoft Exp $
*
*/
#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 2000 Christoph Herrmann, Thomas-Henning von Kamptz\n\
Copyright (c) 1980, 1989, 1993 The Regents of the University of California.\n\
All rights reserved.\n";
#endif /* not lint */
#ifndef lint
static const char rcsid[] =
"$FreeBSD$";
#endif /* not lint */
/* ********************************************************** INCLUDES ***** */
#include <sys/param.h>
#include <sys/disklabel.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <stdio.h>
#include <paths.h>
#include <ctype.h>
#include <err.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <ufs/ufs/dinode.h>
#include <ufs/ffs/fs.h>
#include "debug.h"
/* *************************************************** GLOBALS & TYPES ***** */
#ifdef FS_DEBUG
int _dbg_lvl_ = (DL_INFO); /* DL_TRC */
#endif /* FS_DEBUG */
static union {
struct fs fs;
char pad[SBLOCKSIZE];
} fsun1, fsun2;
#define sblock fsun1.fs /* the new superblock */
#define osblock fsun2.fs /* the old superblock */
/*
* Possible superblock locations ordered from most to least likely.
*/
static int sblock_try[] = SBLOCKSEARCH;
static ufs2_daddr_t sblockloc;
static union {
struct cg cg;
char pad[MAXBSIZE];
} cgun1, cgun2;
#define acg cgun1.cg /* a cylinder cgroup (new) */
#define aocg cgun2.cg /* an old cylinder group */
static char ablk[MAXBSIZE]; /* a block */
static struct csum *fscs; /* cylinder summary */
union dinode {
struct ufs1_dinode dp1;
struct ufs2_dinode dp2;
};
#define DIP(dp, field) \
((sblock.fs_magic == FS_UFS1_MAGIC) ? \
(dp)->dp1.field : (dp)->dp2.field)
static ufs2_daddr_t inoblk; /* inode block address */
static char inobuf[MAXBSIZE]; /* inode block */
static int maxino; /* last valid inode */
/*
* An array of elements of type struct gfs_bpp describes all blocks to
* be relocated in order to free the space needed for the cylinder group
* summary for all cylinder groups located in the first cylinder group.
*/
struct gfs_bpp {
ufs2_daddr_t old; /* old block number */
ufs2_daddr_t new; /* new block number */
#define GFS_FL_FIRST 1
#define GFS_FL_LAST 2
unsigned int flags; /* special handling required */
int found; /* how many references were updated */
};
/* ******************************************************** PROTOTYPES ***** */
static void growfs(int, int, unsigned int);
static void rdfs(ufs2_daddr_t, size_t, void *, int);
static void wtfs(ufs2_daddr_t, size_t, void *, int, unsigned int);
static ufs2_daddr_t alloc(void);
static int charsperline(void);
static void usage(void);
static int isblock(struct fs *, unsigned char *, int);
static void clrblock(struct fs *, unsigned char *, int);
static void setblock(struct fs *, unsigned char *, int);
static void initcg(int, time_t, int, unsigned int);
static void updjcg(int, time_t, int, int, unsigned int);
static void updcsloc(time_t, int, int, unsigned int);
static struct disklabel *get_disklabel(int);
static void return_disklabel(int, struct disklabel *, unsigned int);
static union dinode *ginode(ino_t, int, int);
static void frag_adjust(ufs2_daddr_t, int);
static int cond_bl_upd(ufs2_daddr_t *, struct gfs_bpp *, int, int,
unsigned int);
static void updclst(int);
static void updrefs(int, ino_t, struct gfs_bpp *, int, int, unsigned int);
static void indirchk(ufs_lbn_t, ufs_lbn_t, ufs2_daddr_t, ufs_lbn_t,
struct gfs_bpp *, int, int, unsigned int);
/* ************************************************************ growfs ***** */
/*
* Here we actually start growing the filesystem. We basically read the
* cylinder summary from the first cylinder group as we want to update
* this on the fly during our various operations. First we handle the
* changes in the former last cylinder group. Afterwards we create all new
* cylinder groups. Now we handle the cylinder group containing the
* cylinder summary which might result in a relocation of the whole
* structure. In the end we write back the updated cylinder summary, the
* new superblock, and slightly patched versions of the super block
* copies.
*/
static void
growfs(int fsi, int fso, unsigned int Nflag)
{
DBG_FUNC("growfs")
int i;
int cylno, j;
time_t utime;
int width;
char tmpbuf[100];
#ifdef FSIRAND
static int randinit=0;
DBG_ENTER;
if (!randinit) {
randinit = 1;
srandomdev();
}
#else /* not FSIRAND */
DBG_ENTER;
#endif /* FSIRAND */
time(&utime);
/*
* Get the cylinder summary into the memory.
*/
fscs = (struct csum *)calloc((size_t)1, (size_t)sblock.fs_cssize);
if(fscs == NULL) {
errx(1, "calloc failed");
}
for (i = 0; i < osblock.fs_cssize; i += osblock.fs_bsize) {
rdfs(fsbtodb(&osblock, osblock.fs_csaddr +
numfrags(&osblock, i)), (size_t)MIN(osblock.fs_cssize - i,
osblock.fs_bsize), (void *)(((char *)fscs)+i), fsi);
}
#ifdef FS_DEBUG
{
struct csum *dbg_csp;
int dbg_csc;
char dbg_line[80];
dbg_csp=fscs;
for(dbg_csc=0; dbg_csc<osblock.fs_ncg; dbg_csc++) {
snprintf(dbg_line, sizeof(dbg_line),
"%d. old csum in old location", dbg_csc);
DBG_DUMP_CSUM(&osblock,
dbg_line,
dbg_csp++);
}
}
#endif /* FS_DEBUG */
DBG_PRINT0("fscs read\n");
/*
* Do all needed changes in the former last cylinder group.
*/
updjcg(osblock.fs_ncg-1, utime, fsi, fso, Nflag);
/*
* Dump out summary information about filesystem.
*/
# define B2MBFACTOR (1 / (1024.0 * 1024.0))
printf("growfs: %.1fMB (%qd sectors) block size %d, fragment size %d\n",
(float)sblock.fs_size * sblock.fs_fsize * B2MBFACTOR,
fsbtodb(&sblock, sblock.fs_size), sblock.fs_bsize, sblock.fs_fsize);
printf("\tusing %d cylinder groups of %.2fMB, %d blks, %d inodes.\n",
sblock.fs_ncg, (float)sblock.fs_fpg * sblock.fs_fsize * B2MBFACTOR,
sblock.fs_fpg / sblock.fs_frag, sblock.fs_ipg);
if (sblock.fs_flags & FS_DOSOFTDEP)
printf("\twith soft updates\n");
# undef B2MBFACTOR
/*
* Now build the cylinders group blocks and
* then print out indices of cylinder groups.
*/
printf("super-block backups (for fsck -b #) at:\n");
i = 0;
width = charsperline();
/*
* Iterate for only the new cylinder groups.
*/
for (cylno = osblock.fs_ncg; cylno < sblock.fs_ncg; cylno++) {
initcg(cylno, utime, fso, Nflag);
j = sprintf(tmpbuf, " %d%s",
(int)fsbtodb(&sblock, cgsblock(&sblock, cylno)),
cylno < (sblock.fs_ncg-1) ? "," : "" );
if (i + j >= width) {
printf("\n");
i = 0;
}
i += j;
printf("%s", tmpbuf);
fflush(stdout);
}
printf("\n");
/*
* Do all needed changes in the first cylinder group.
* allocate blocks in new location
*/
updcsloc(utime, fsi, fso, Nflag);
/*
* Now write the cylinder summary back to disk.
*/
for (i = 0; i < sblock.fs_cssize; i += sblock.fs_bsize) {
wtfs(fsbtodb(&sblock, sblock.fs_csaddr + numfrags(&sblock, i)),
(size_t)MIN(sblock.fs_cssize - i, sblock.fs_bsize),
(void *)(((char *)fscs) + i), fso, Nflag);
}
DBG_PRINT0("fscs written\n");
#ifdef FS_DEBUG
{
struct csum *dbg_csp;
int dbg_csc;
char dbg_line[80];
dbg_csp=fscs;
for(dbg_csc=0; dbg_csc<sblock.fs_ncg; dbg_csc++) {
snprintf(dbg_line, sizeof(dbg_line),
"%d. new csum in new location", dbg_csc);
DBG_DUMP_CSUM(&sblock,
dbg_line,
dbg_csp++);
}
}
#endif /* FS_DEBUG */
/*
* Now write the new superblock back to disk.
*/
sblock.fs_time = utime;
wtfs(sblockloc, (size_t)SBLOCKSIZE, (void *)&sblock, fso, Nflag);
DBG_PRINT0("sblock written\n");
DBG_DUMP_FS(&sblock,
"new initial sblock");
/*
* Clean up the dynamic fields in our superblock copies.
*/
sblock.fs_fmod = 0;
sblock.fs_clean = 1;
sblock.fs_ronly = 0;
sblock.fs_cgrotor = 0;
sblock.fs_state = 0;
memset((void *)&sblock.fs_fsmnt, 0, sizeof(sblock.fs_fsmnt));
sblock.fs_flags &= FS_DOSOFTDEP;
/*
* XXX
* The following fields are currently distributed from the superblock
* to the copies:
* fs_minfree
* fs_rotdelay
* fs_maxcontig
* fs_maxbpg
* fs_minfree,
* fs_optim
* fs_flags regarding SOFTPDATES
*
* We probably should rather change the summary for the cylinder group
* statistics here to the value of what would be in there, if the file
* system were created initially with the new size. Therefor we still
* need to find an easy way of calculating that.
* Possibly we can try to read the first superblock copy and apply the
* "diffed" stats between the old and new superblock by still copying
* certain parameters onto that.
*/
/*
* Write out the duplicate super blocks.
*/
for (cylno = 0; cylno < sblock.fs_ncg; cylno++) {
wtfs(fsbtodb(&sblock, cgsblock(&sblock, cylno)),
(size_t)SBLOCKSIZE, (void *)&sblock, fso, Nflag);
}
DBG_PRINT0("sblock copies written\n");
DBG_DUMP_FS(&sblock,
"new other sblocks");
DBG_LEAVE;
return;
}
/* ************************************************************ initcg ***** */
/*
* This creates a new cylinder group structure, for more details please see
* the source of newfs(8), as this function is taken over almost unchanged.
* As this is never called for the first cylinder group, the special
* provisions for that case are removed here.
*/
static void
initcg(int cylno, time_t utime, int fso, unsigned int Nflag)
{
DBG_FUNC("initcg")
static caddr_t iobuf;
long i, j, d, dlower, dupper, blkno, start;
ufs2_daddr_t cbase, dmax;
struct ufs1_dinode *dp1;
struct ufs2_dinode *dp2;
struct csum *cs;
if (iobuf == NULL && (iobuf = malloc(sblock.fs_bsize)) == NULL) {
errx(37, "panic: cannot allocate I/O buffer");
}
/*
* Determine block bounds for cylinder group.
* Allow space for super block summary information in first
* cylinder group.
*/
cbase = cgbase(&sblock, cylno);
dmax = cbase + sblock.fs_fpg;
if (dmax > sblock.fs_size)
dmax = sblock.fs_size;
dlower = cgsblock(&sblock, cylno) - cbase;
dupper = cgdmin(&sblock, cylno) - cbase;
if (cylno == 0) /* XXX fscs may be relocated */
dupper += howmany(sblock.fs_cssize, sblock.fs_fsize);
cs = &fscs[cylno];
memset(&acg, 0, sblock.fs_cgsize);
acg.cg_time = utime;
acg.cg_magic = CG_MAGIC;
acg.cg_cgx = cylno;
acg.cg_niblk = sblock.fs_ipg;
acg.cg_initediblk = sblock.fs_ipg;
acg.cg_ndblk = dmax - cbase;
if (sblock.fs_contigsumsize > 0)
acg.cg_nclusterblks = acg.cg_ndblk / sblock.fs_frag;
start = &acg.cg_space[0] - (u_char *)(&acg.cg_firstfield);
if (sblock.fs_magic == FS_UFS2_MAGIC) {
acg.cg_iusedoff = start;
} else {
acg.cg_old_ncyl = sblock.fs_old_cpg;
acg.cg_old_time = acg.cg_time;
acg.cg_time = 0;
acg.cg_old_niblk = acg.cg_niblk;
acg.cg_niblk = 0;
acg.cg_initediblk = 0;
acg.cg_old_btotoff = start;
acg.cg_old_boff = acg.cg_old_btotoff +
sblock.fs_old_cpg * sizeof(int32_t);
acg.cg_iusedoff = acg.cg_old_boff +
sblock.fs_old_cpg * sizeof(u_int16_t);
}
acg.cg_freeoff = acg.cg_iusedoff + howmany(sblock.fs_ipg, NBBY);
acg.cg_nextfreeoff = acg.cg_freeoff + howmany(sblock.fs_fpg, NBBY);
if (sblock.fs_contigsumsize > 0) {
acg.cg_clustersumoff =
roundup(acg.cg_nextfreeoff, sizeof(u_int32_t));
acg.cg_clustersumoff -= sizeof(u_int32_t);
acg.cg_clusteroff = acg.cg_clustersumoff +
(sblock.fs_contigsumsize + 1) * sizeof(u_int32_t);
acg.cg_nextfreeoff = acg.cg_clusteroff +
howmany(fragstoblks(&sblock, sblock.fs_fpg), NBBY);
}
if (acg.cg_nextfreeoff > sblock.fs_cgsize) {
/*
* This should never happen as we would have had that panic
* already on filesystem creation
*/
errx(37, "panic: cylinder group too big");
}
acg.cg_cs.cs_nifree += sblock.fs_ipg;
if (cylno == 0)
for (i = 0; i < ROOTINO; i++) {
setbit(cg_inosused(&acg), i);
acg.cg_cs.cs_nifree--;
}
bzero(iobuf, sblock.fs_bsize);
for (i = 0; i < sblock.fs_ipg / INOPF(&sblock); i += sblock.fs_frag) {
dp1 = (struct ufs1_dinode *)iobuf;
dp2 = (struct ufs2_dinode *)iobuf;
#ifdef FSIRAND
for (j = 0; j < INOPB(&sblock); j++)
if (sblock.fs_magic == FS_UFS1_MAGIC) {
dp1->di_gen = random();
dp1++;
} else {
dp2->di_gen = random();
dp2++;
}
#endif
wtfs(fsbtodb(&sblock, cgimin(&sblock, cylno) + i),
sblock.fs_bsize, iobuf, fso, Nflag);
}
if (cylno > 0) {
/*
* In cylno 0, beginning space is reserved
* for boot and super blocks.
*/
for (d = 0; d < dlower; d += sblock.fs_frag) {
blkno = d / sblock.fs_frag;
setblock(&sblock, cg_blksfree(&acg), blkno);
if (sblock.fs_contigsumsize > 0)
setbit(cg_clustersfree(&acg), blkno);
acg.cg_cs.cs_nbfree++;
}
sblock.fs_dsize += dlower;
}
sblock.fs_dsize += acg.cg_ndblk - dupper;
if ((i = dupper % sblock.fs_frag)) {
acg.cg_frsum[sblock.fs_frag - i]++;
for (d = dupper + sblock.fs_frag - i; dupper < d; dupper++) {
setbit(cg_blksfree(&acg), dupper);
acg.cg_cs.cs_nffree++;
}
}
for (d = dupper; d + sblock.fs_frag <= acg.cg_ndblk;
d += sblock.fs_frag) {
blkno = d / sblock.fs_frag;
setblock(&sblock, cg_blksfree(&acg), blkno);
if (sblock.fs_contigsumsize > 0)
setbit(cg_clustersfree(&acg), blkno);
acg.cg_cs.cs_nbfree++;
}
if (d < acg.cg_ndblk) {
acg.cg_frsum[acg.cg_ndblk - d]++;
for (; d < acg.cg_ndblk; d++) {
setbit(cg_blksfree(&acg), d);
acg.cg_cs.cs_nffree++;
}
}
if (sblock.fs_contigsumsize > 0) {
int32_t *sump = cg_clustersum(&acg);
u_char *mapp = cg_clustersfree(&acg);
int map = *mapp++;
int bit = 1;
int run = 0;
for (i = 0; i < acg.cg_nclusterblks; i++) {
if ((map & bit) != 0)
run++;
else if (run != 0) {
if (run > sblock.fs_contigsumsize)
run = sblock.fs_contigsumsize;
sump[run]++;
run = 0;
}
if ((i & (NBBY - 1)) != NBBY - 1)
bit <<= 1;
else {
map = *mapp++;
bit = 1;
}
}
if (run != 0) {
if (run > sblock.fs_contigsumsize)
run = sblock.fs_contigsumsize;
sump[run]++;
}
}
sblock.fs_cstotal.cs_ndir += acg.cg_cs.cs_ndir;
sblock.fs_cstotal.cs_nffree += acg.cg_cs.cs_nffree;
sblock.fs_cstotal.cs_nbfree += acg.cg_cs.cs_nbfree;
sblock.fs_cstotal.cs_nifree += acg.cg_cs.cs_nifree;
*cs = acg.cg_cs;
wtfs(fsbtodb(&sblock, cgtod(&sblock, cylno)),
sblock.fs_bsize, (char *)&acg, fso, Nflag);
DBG_DUMP_CG(&sblock,
"new cg",
&acg);
DBG_LEAVE;
return;
}
/* ******************************************************* frag_adjust ***** */
/*
* Here we add or subtract (sign +1/-1) the available fragments in a given
* block to or from the fragment statistics. By subtracting before and adding
* after an operation on the free frag map we can easy update the fragment
* statistic, which seems to be otherwise an rather complex operation.
*/
static void
frag_adjust(ufs2_daddr_t frag, int sign)
{
DBG_FUNC("frag_adjust")
int fragsize;
int f;
DBG_ENTER;
fragsize=0;
/*
* Here frag only needs to point to any fragment in the block we want
* to examine.
*/
for(f=rounddown(frag, sblock.fs_frag);
f<roundup(frag+1, sblock.fs_frag);
f++) {
/*
* Count contiguos free fragments.
*/
if(isset(cg_blksfree(&acg), f)) {
fragsize++;
} else {
if(fragsize && fragsize<sblock.fs_frag) {
/*
* We found something in between.
*/
acg.cg_frsum[fragsize]+=sign;
DBG_PRINT2("frag_adjust [%d]+=%d\n",
fragsize,
sign);
}
fragsize=0;
}
}
if(fragsize && fragsize<sblock.fs_frag) {
/*
* We found something.
*/
acg.cg_frsum[fragsize]+=sign;
DBG_PRINT2("frag_adjust [%d]+=%d\n",
fragsize,
sign);
}
DBG_PRINT2("frag_adjust [[%d]]+=%d\n",
fragsize,
sign);
DBG_LEAVE;
return;
}
/* ******************************************************* cond_bl_upd ***** */
/*
* Here we conditionally update a pointer to a fragment. We check for all
* relocated blocks if any of it's fragments is referenced by the current
* field, and update the pointer to the respective fragment in our new
* block. If we find a reference we write back the block immediately,
* as there is no easy way for our general block reading engine to figure
* out if a write back operation is needed.
*/
static int
cond_bl_upd(ufs2_daddr_t *block, struct gfs_bpp *field, int fsi, int fso,
unsigned int Nflag)
{
DBG_FUNC("cond_bl_upd")
struct gfs_bpp *f;
ufs2_daddr_t src, dst;
int fragnum;
void *ibuf;
DBG_ENTER;
f = field;
for (f = field; f->old != 0; f++) {
src = *block;
if (fragstoblks(&sblock, src) != f->old)
continue;
/*
* The fragment is part of the block, so update.
*/
dst = blkstofrags(&sblock, f->new);
fragnum = fragnum(&sblock, src);
*block = dst + fragnum;
f->found++;
DBG_PRINT3("scg (%d->%d)[%d] reference updated\n",
f->old,
f->new,
fragnum);
/*
* Copy the block back immediately.
*
* XXX If src is is from an indirect block we have
* to implement copy on write here in case of
* active snapshots.
*/
ibuf = malloc(sblock.fs_bsize);
if (!ibuf)
errx(1, "malloc failed");
src -= fragnum;
rdfs(fsbtodb(&sblock, src), (size_t)sblock.fs_bsize, ibuf, fsi);
wtfs(dst, (size_t)sblock.fs_bsize, ibuf, fso, Nflag);
free(ibuf);
/*
* The same block can't be found again in this loop.
*/
return (1);
}
DBG_LEAVE;
return (0);
}
/* ************************************************************ updjcg ***** */
/*
* Here we do all needed work for the former last cylinder group. It has to be
* changed in any case, even if the filesystem ended exactly on the end of
* this group, as there is some slightly inconsistent handling of the number
* of cylinders in the cylinder group. We start again by reading the cylinder
* group from disk. If the last block was not fully available, we first handle
* the missing fragments, then we handle all new full blocks in that file
* system and finally we handle the new last fragmented block in the file
* system. We again have to handle the fragment statistics rotational layout
* tables and cluster summary during all those operations.
*/
static void
updjcg(int cylno, time_t utime, int fsi, int fso, unsigned int Nflag)
{
DBG_FUNC("updjcg")
ufs2_daddr_t cbase, dmax, dupper;
struct csum *cs;
int i,k;
int j=0;
DBG_ENTER;
/*
* Read the former last (joining) cylinder group from disk, and make
* a copy.
*/
rdfs(fsbtodb(&osblock, cgtod(&osblock, cylno)),
(size_t)osblock.fs_cgsize, (void *)&aocg, fsi);
DBG_PRINT0("jcg read\n");
DBG_DUMP_CG(&sblock,
"old joining cg",
&aocg);
memcpy((void *)&cgun1, (void *)&cgun2, sizeof(cgun2));
/*
* If the cylinder group had already it's new final size almost
* nothing is to be done ... except:
* For some reason the value of cg_ncyl in the last cylinder group has
* to be zero instead of fs_cpg. As this is now no longer the last
* cylinder group we have to change that value now to fs_cpg.
*/
if(cgbase(&osblock, cylno+1) == osblock.fs_size) {
if (sblock.fs_magic == FS_UFS1_MAGIC)
acg.cg_old_ncyl=sblock.fs_old_cpg;
wtfs(fsbtodb(&sblock, cgtod(&sblock, cylno)),
(size_t)sblock.fs_cgsize, (void *)&acg, fso, Nflag);
DBG_PRINT0("jcg written\n");
DBG_DUMP_CG(&sblock,
"new joining cg",
&acg);
DBG_LEAVE;
return;
}
/*
* Set up some variables needed later.
*/
cbase = cgbase(&sblock, cylno);
dmax = cbase + sblock.fs_fpg;
if (dmax > sblock.fs_size)
dmax = sblock.fs_size;
dupper = cgdmin(&sblock, cylno) - cbase;
if (cylno == 0) { /* XXX fscs may be relocated */
dupper += howmany(sblock.fs_cssize, sblock.fs_fsize);
}
/*
* Set pointer to the cylinder summary for our cylinder group.
*/
cs = fscs + cylno;
/*
* Touch the cylinder group, update all fields in the cylinder group as
* needed, update the free space in the superblock.
*/
acg.cg_time = utime;
if (cylno == sblock.fs_ncg - 1) {
/*
* This is still the last cylinder group.
*/
if (sblock.fs_magic == FS_UFS1_MAGIC)
acg.cg_old_ncyl =
sblock.fs_old_ncyl % sblock.fs_old_cpg;
} else {
acg.cg_old_ncyl = sblock.fs_old_cpg;
}
DBG_PRINT2("jcg dbg: %d %u",
cylno,
sblock.fs_ncg);
if (sblock.fs_magic == FS_UFS1_MAGIC)
DBG_PRINT2("%d %u",
acg.cg_old_ncyl,
sblock.fs_old_cpg);
DBG_PRINT0("\n");
acg.cg_ndblk = dmax - cbase;
sblock.fs_dsize += acg.cg_ndblk-aocg.cg_ndblk;
if (sblock.fs_contigsumsize > 0) {
acg.cg_nclusterblks = acg.cg_ndblk / sblock.fs_frag;
}
/*
* Now we have to update the free fragment bitmap for our new free
* space. There again we have to handle the fragmentation and also
* the rotational layout tables and the cluster summary. This is
* also done per fragment for the first new block if the old file
* system end was not on a block boundary, per fragment for the new
* last block if the new filesystem end is not on a block boundary,
* and per block for all space in between.
*
* Handle the first new block here if it was partially available
* before.
*/
if(osblock.fs_size % sblock.fs_frag) {
if(roundup(osblock.fs_size, sblock.fs_frag)<=sblock.fs_size) {
/*
* The new space is enough to fill at least this
* block
*/
j=0;
for(i=roundup(osblock.fs_size-cbase, sblock.fs_frag)-1;
i>=osblock.fs_size-cbase;
i--) {
setbit(cg_blksfree(&acg), i);
acg.cg_cs.cs_nffree++;
j++;
}
/*
* Check if the fragment just created could join an
* already existing fragment at the former end of the
* filesystem.
*/
if(isblock(&sblock, cg_blksfree(&acg),
((osblock.fs_size - cgbase(&sblock, cylno))/
sblock.fs_frag))) {
/*
* The block is now completely available
*/
DBG_PRINT0("block was\n");
acg.cg_frsum[osblock.fs_size%sblock.fs_frag]--;
acg.cg_cs.cs_nbfree++;
acg.cg_cs.cs_nffree-=sblock.fs_frag;
k=rounddown(osblock.fs_size-cbase,
sblock.fs_frag);
updclst((osblock.fs_size-cbase)/sblock.fs_frag);
} else {
/*
* Lets rejoin a possible partially growed
* fragment.
*/
k=0;
while(isset(cg_blksfree(&acg), i) &&
(i>=rounddown(osblock.fs_size-cbase,
sblock.fs_frag))) {
i--;
k++;
}
if(k) {
acg.cg_frsum[k]--;
}
acg.cg_frsum[k+j]++;
}
} else {
/*
* We only grow by some fragments within this last
* block.
*/
for(i=sblock.fs_size-cbase-1;
i>=osblock.fs_size-cbase;
i--) {
setbit(cg_blksfree(&acg), i);
acg.cg_cs.cs_nffree++;
j++;
}
/*
* Lets rejoin a possible partially growed fragment.
*/
k=0;
while(isset(cg_blksfree(&acg), i) &&
(i>=rounddown(osblock.fs_size-cbase,
sblock.fs_frag))) {
i--;
k++;
}
if(k) {
acg.cg_frsum[k]--;
}
acg.cg_frsum[k+j]++;
}
}
/*
* Handle all new complete blocks here.
*/
for(i=roundup(osblock.fs_size-cbase, sblock.fs_frag);
i+sblock.fs_frag<=dmax-cbase; /* XXX <= or only < ? */
i+=sblock.fs_frag) {
j = i / sblock.fs_frag;
setblock(&sblock, cg_blksfree(&acg), j);
updclst(j);
acg.cg_cs.cs_nbfree++;
}
/*
* Handle the last new block if there are stll some new fragments left.
* Here we don't have to bother about the cluster summary or the even
* the rotational layout table.
*/
if (i < (dmax - cbase)) {
acg.cg_frsum[dmax - cbase - i]++;
for (; i < dmax - cbase; i++) {
setbit(cg_blksfree(&acg), i);
acg.cg_cs.cs_nffree++;
}
}
sblock.fs_cstotal.cs_nffree +=
(acg.cg_cs.cs_nffree - aocg.cg_cs.cs_nffree);
sblock.fs_cstotal.cs_nbfree +=
(acg.cg_cs.cs_nbfree - aocg.cg_cs.cs_nbfree);
/*
* The following statistics are not changed here:
* sblock.fs_cstotal.cs_ndir
* sblock.fs_cstotal.cs_nifree
* As the statistics for this cylinder group are ready, copy it to
* the summary information array.
*/
*cs = acg.cg_cs;
/*
* Write the updated "joining" cylinder group back to disk.
*/
wtfs(fsbtodb(&sblock, cgtod(&sblock, cylno)), (size_t)sblock.fs_cgsize,
(void *)&acg, fso, Nflag);
DBG_PRINT0("jcg written\n");
DBG_DUMP_CG(&sblock,
"new joining cg",
&acg);
DBG_LEAVE;
return;
}
/* ********************************************************** updcsloc ***** */
/*
* Here we update the location of the cylinder summary. We have two possible
* ways of growing the cylinder summary.
* (1) We can try to grow the summary in the current location, and relocate
* possibly used blocks within the current cylinder group.
* (2) Alternatively we can relocate the whole cylinder summary to the first
* new completely empty cylinder group. Once the cylinder summary is no
* longer in the beginning of the first cylinder group you should never
* use a version of fsck which is not aware of the possibility to have
* this structure in a non standard place.
* Option (1) is considered to be less intrusive to the structure of the file-
* system. So we try to stick to that whenever possible. If there is not enough
* space in the cylinder group containing the cylinder summary we have to use
* method (2). In case of active snapshots in the filesystem we probably can
* completely avoid implementing copy on write if we stick to method (2) only.
*/
static void
updcsloc(time_t utime, int fsi, int fso, unsigned int Nflag)
{
DBG_FUNC("updcsloc")
struct csum *cs;
int ocscg, ncscg;
int blocks;
ufs2_daddr_t cbase, dupper, odupper, d, f, g;
int ind;
int cylno, inc;
struct gfs_bpp *bp;
int i, l;
int lcs=0;
int block;
DBG_ENTER;
if(howmany(sblock.fs_cssize, sblock.fs_fsize) ==
howmany(osblock.fs_cssize, osblock.fs_fsize)) {
/*
* No new fragment needed.
*/
DBG_LEAVE;
return;
}
ocscg=dtog(&osblock, osblock.fs_csaddr);
cs=fscs+ocscg;
blocks = 1+howmany(sblock.fs_cssize, sblock.fs_bsize)-
howmany(osblock.fs_cssize, osblock.fs_bsize);
/*
* Read original cylinder group from disk, and make a copy.
* XXX If Nflag is set in some very rare cases we now miss
* some changes done in updjcg by reading the unmodified
* block from disk.
*/
rdfs(fsbtodb(&osblock, cgtod(&osblock, ocscg)),
(size_t)osblock.fs_cgsize, (void *)&aocg, fsi);
DBG_PRINT0("oscg read\n");
DBG_DUMP_CG(&sblock,
"old summary cg",
&aocg);
memcpy((void *)&cgun1, (void *)&cgun2, sizeof(cgun2));
/*
* Touch the cylinder group, set up local variables needed later
* and update the superblock.
*/
acg.cg_time = utime;
/*
* XXX In the case of having active snapshots we may need much more
* blocks for the copy on write. We need each block twice, and
* also up to 8*3 blocks for indirect blocks for all possible
* references.
*/
if(/*((int)sblock.fs_time&0x3)>0||*/ cs->cs_nbfree < blocks) {
/*
* There is not enough space in the old cylinder group to
* relocate all blocks as needed, so we relocate the whole
* cylinder group summary to a new group. We try to use the
* first complete new cylinder group just created. Within the
* cylinder group we allign the area immediately after the
* cylinder group information location in order to be as
* close as possible to the original implementation of ffs.
*
* First we have to make sure we'll find enough space in the
* new cylinder group. If not, then we currently give up.
* We start with freeing everything which was used by the
* fragments of the old cylinder summary in the current group.
* Now we write back the group meta data, read in the needed
* meta data from the new cylinder group, and start allocating
* within that group. Here we can assume, the group to be
* completely empty. Which makes the handling of fragments and
* clusters a lot easier.
*/
DBG_TRC;
if(sblock.fs_ncg-osblock.fs_ncg < 2) {
errx(2, "panic: not enough space");
}
/*
* Point "d" to the first fragment not used by the cylinder
* summary.
*/
d=osblock.fs_csaddr+(osblock.fs_cssize/osblock.fs_fsize);
/*
* Set up last cluster size ("lcs") already here. Calculate
* the size for the trailing cluster just behind where "d"
* points to.
*/
if(sblock.fs_contigsumsize > 0) {
for(block=howmany(d%sblock.fs_fpg, sblock.fs_frag),
lcs=0; lcs<sblock.fs_contigsumsize;
block++, lcs++) {
if(isclr(cg_clustersfree(&acg), block)){
break;
}
}
}
/*
* Point "d" to the last frag used by the cylinder summary.
*/
d--;
DBG_PRINT1("d=%d\n",
d);
if((d+1)%sblock.fs_frag) {
/*
* The end of the cylinder summary is not a complete
* block.
*/
DBG_TRC;
frag_adjust(d%sblock.fs_fpg, -1);
for(; (d+1)%sblock.fs_frag; d--) {
DBG_PRINT1("d=%d\n",
d);
setbit(cg_blksfree(&acg), d%sblock.fs_fpg);
acg.cg_cs.cs_nffree++;
sblock.fs_cstotal.cs_nffree++;
}
/*
* Point "d" to the last fragment of the last
* (incomplete) block of the clinder summary.
*/
d++;
frag_adjust(d%sblock.fs_fpg, 1);
if(isblock(&sblock, cg_blksfree(&acg),
(d%sblock.fs_fpg)/sblock.fs_frag)) {
DBG_PRINT1("d=%d\n",
d);
acg.cg_cs.cs_nffree-=sblock.fs_frag;
acg.cg_cs.cs_nbfree++;
sblock.fs_cstotal.cs_nffree-=sblock.fs_frag;
sblock.fs_cstotal.cs_nbfree++;
if(sblock.fs_contigsumsize > 0) {
setbit(cg_clustersfree(&acg),
(d%sblock.fs_fpg)/sblock.fs_frag);
if(lcs < sblock.fs_contigsumsize) {
if(lcs) {
cg_clustersum(&acg)
[lcs]--;
}
lcs++;
cg_clustersum(&acg)[lcs]++;
}
}
}
/*
* Point "d" to the first fragment of the block before
* the last incomplete block.
*/
d--;
}
DBG_PRINT1("d=%d\n",
d);
for(d=rounddown(d, sblock.fs_frag); d >= osblock.fs_csaddr;
d-=sblock.fs_frag) {
DBG_TRC;
DBG_PRINT1("d=%d\n",
d);
setblock(&sblock, cg_blksfree(&acg),
(d%sblock.fs_fpg)/sblock.fs_frag);
acg.cg_cs.cs_nbfree++;
sblock.fs_cstotal.cs_nbfree++;
if(sblock.fs_contigsumsize > 0) {
setbit(cg_clustersfree(&acg),
(d%sblock.fs_fpg)/sblock.fs_frag);
/*
* The last cluster size is already set up.
*/
if(lcs < sblock.fs_contigsumsize) {
if(lcs) {
cg_clustersum(&acg)[lcs]--;
}
lcs++;
cg_clustersum(&acg)[lcs]++;
}
}
}
*cs = acg.cg_cs;
/*
* Now write the former cylinder group containing the cylinder
* summary back to disk.
*/
wtfs(fsbtodb(&sblock, cgtod(&sblock, ocscg)),
(size_t)sblock.fs_cgsize, (void *)&acg, fso, Nflag);
DBG_PRINT0("oscg written\n");
DBG_DUMP_CG(&sblock,
"old summary cg",
&acg);
/*
* Find the beginning of the new cylinder group containing the
* cylinder summary.
*/
sblock.fs_csaddr=cgdmin(&sblock, osblock.fs_ncg);
ncscg=dtog(&sblock, sblock.fs_csaddr);
cs=fscs+ncscg;
/*
* If Nflag is specified, we would now read random data instead
* of an empty cg structure from disk. So we can't simulate that
* part for now.
*/
if(Nflag) {
DBG_PRINT0("nscg update skipped\n");
DBG_LEAVE;
return;
}
/*
* Read the future cylinder group containing the cylinder
* summary from disk, and make a copy.
*/
rdfs(fsbtodb(&sblock, cgtod(&sblock, ncscg)),
(size_t)sblock.fs_cgsize, (void *)&aocg, fsi);
DBG_PRINT0("nscg read\n");
DBG_DUMP_CG(&sblock,
"new summary cg",
&aocg);
memcpy((void *)&cgun1, (void *)&cgun2, sizeof(cgun2));
/*
* Allocate all complete blocks used by the new cylinder
* summary.
*/
for(d=sblock.fs_csaddr; d+sblock.fs_frag <=
sblock.fs_csaddr+(sblock.fs_cssize/sblock.fs_fsize);
d+=sblock.fs_frag) {
clrblock(&sblock, cg_blksfree(&acg),
(d%sblock.fs_fpg)/sblock.fs_frag);
acg.cg_cs.cs_nbfree--;
sblock.fs_cstotal.cs_nbfree--;
if(sblock.fs_contigsumsize > 0) {
clrbit(cg_clustersfree(&acg),
(d%sblock.fs_fpg)/sblock.fs_frag);
}
}
/*
* Allocate all fragments used by the cylinder summary in the
* last block.
*/
if(d<sblock.fs_csaddr+(sblock.fs_cssize/sblock.fs_fsize)) {
for(; d-sblock.fs_csaddr<
sblock.fs_cssize/sblock.fs_fsize;
d++) {
clrbit(cg_blksfree(&acg), d%sblock.fs_fpg);
acg.cg_cs.cs_nffree--;
sblock.fs_cstotal.cs_nffree--;
}
acg.cg_cs.cs_nbfree--;
acg.cg_cs.cs_nffree+=sblock.fs_frag;
sblock.fs_cstotal.cs_nbfree--;
sblock.fs_cstotal.cs_nffree+=sblock.fs_frag;
if(sblock.fs_contigsumsize > 0) {
clrbit(cg_clustersfree(&acg),
(d%sblock.fs_fpg)/sblock.fs_frag);
}
frag_adjust(d%sblock.fs_fpg, +1);
}
/*
* XXX Handle the cluster statistics here in the case this
* cylinder group is now almost full, and the remaining
* space is less then the maximum cluster size. This is
* probably not needed, as you would hardly find a file
* system which has only MAXCSBUFS+FS_MAXCONTIG of free
* space right behind the cylinder group information in
* any new cylinder group.
*/
/*
* Update our statistics in the cylinder summary.
*/
*cs = acg.cg_cs;
/*
* Write the new cylinder group containing the cylinder summary
* back to disk.
*/
wtfs(fsbtodb(&sblock, cgtod(&sblock, ncscg)),
(size_t)sblock.fs_cgsize, (void *)&acg, fso, Nflag);
DBG_PRINT0("nscg written\n");
DBG_DUMP_CG(&sblock,
"new summary cg",
&acg);
DBG_LEAVE;
return;
}
/*
* We have got enough of space in the current cylinder group, so we
* can relocate just a few blocks, and let the summary information
* grow in place where it is right now.
*/
DBG_TRC;
cbase = cgbase(&osblock, ocscg); /* old and new are equal */
dupper = sblock.fs_csaddr - cbase +
howmany(sblock.fs_cssize, sblock.fs_fsize);
odupper = osblock.fs_csaddr - cbase +
howmany(osblock.fs_cssize, osblock.fs_fsize);
sblock.fs_dsize -= dupper-odupper;
/*
* Allocate the space for the array of blocks to be relocated.
*/
bp=(struct gfs_bpp *)malloc(((dupper-odupper)/sblock.fs_frag+2)*
sizeof(struct gfs_bpp));
if(bp == NULL) {
errx(1, "malloc failed");
}
memset((char *)bp, 0, ((dupper-odupper)/sblock.fs_frag+2)*
sizeof(struct gfs_bpp));
/*
* Lock all new frags needed for the cylinder group summary. This is
* done per fragment in the first and last block of the new required
* area, and per block for all other blocks.
*
* Handle the first new block here (but only if some fragments where
* already used for the cylinder summary).
*/
ind=0;
frag_adjust(odupper, -1);
for(d=odupper; ((d<dupper)&&(d%sblock.fs_frag)); d++) {
DBG_PRINT1("scg first frag check loop d=%d\n",
d);
if(isclr(cg_blksfree(&acg), d)) {
if (!ind) {
bp[ind].old=d/sblock.fs_frag;
bp[ind].flags|=GFS_FL_FIRST;
if(roundup(d, sblock.fs_frag) >= dupper) {
bp[ind].flags|=GFS_FL_LAST;
}
ind++;
}
} else {
clrbit(cg_blksfree(&acg), d);
acg.cg_cs.cs_nffree--;
sblock.fs_cstotal.cs_nffree--;
}
/*
* No cluster handling is needed here, as there was at least
* one fragment in use by the cylinder summary in the old
* filesystem.
* No block-free counter handling here as this block was not
* a free block.
*/
}
frag_adjust(odupper, 1);
/*
* Handle all needed complete blocks here.
*/
for(; d+sblock.fs_frag<=dupper; d+=sblock.fs_frag) {
DBG_PRINT1("scg block check loop d=%d\n",
d);
if(!isblock(&sblock, cg_blksfree(&acg), d/sblock.fs_frag)) {
for(f=d; f<d+sblock.fs_frag; f++) {
if(isset(cg_blksfree(&aocg), f)) {
acg.cg_cs.cs_nffree--;
sblock.fs_cstotal.cs_nffree--;
}
}
clrblock(&sblock, cg_blksfree(&acg), d/sblock.fs_frag);
bp[ind].old=d/sblock.fs_frag;
ind++;
} else {
clrblock(&sblock, cg_blksfree(&acg), d/sblock.fs_frag);
acg.cg_cs.cs_nbfree--;
sblock.fs_cstotal.cs_nbfree--;
if(sblock.fs_contigsumsize > 0) {
clrbit(cg_clustersfree(&acg), d/sblock.fs_frag);
for(lcs=0, l=(d/sblock.fs_frag)+1;
lcs<sblock.fs_contigsumsize;
l++, lcs++ ) {
if(isclr(cg_clustersfree(&acg),l)){
break;
}
}
if(lcs < sblock.fs_contigsumsize) {
cg_clustersum(&acg)[lcs+1]--;
if(lcs) {
cg_clustersum(&acg)[lcs]++;
}
}
}
}
/*
* No fragment counter handling is needed here, as this finally
* doesn't change after the relocation.
*/
}
/*
* Handle all fragments needed in the last new affected block.
*/
if(d<dupper) {
frag_adjust(dupper-1, -1);
if(isblock(&sblock, cg_blksfree(&acg), d/sblock.fs_frag)) {
acg.cg_cs.cs_nbfree--;
sblock.fs_cstotal.cs_nbfree--;
acg.cg_cs.cs_nffree+=sblock.fs_frag;
sblock.fs_cstotal.cs_nffree+=sblock.fs_frag;
if(sblock.fs_contigsumsize > 0) {
clrbit(cg_clustersfree(&acg), d/sblock.fs_frag);
for(lcs=0, l=(d/sblock.fs_frag)+1;
lcs<sblock.fs_contigsumsize;
l++, lcs++ ) {
if(isclr(cg_clustersfree(&acg),l)){
break;
}
}
if(lcs < sblock.fs_contigsumsize) {
cg_clustersum(&acg)[lcs+1]--;
if(lcs) {
cg_clustersum(&acg)[lcs]++;
}
}
}
}
for(; d<dupper; d++) {
DBG_PRINT1("scg second frag check loop d=%d\n",
d);
if(isclr(cg_blksfree(&acg), d)) {
bp[ind].old=d/sblock.fs_frag;
bp[ind].flags|=GFS_FL_LAST;
} else {
clrbit(cg_blksfree(&acg), d);
acg.cg_cs.cs_nffree--;
sblock.fs_cstotal.cs_nffree--;
}
}
if(bp[ind].flags & GFS_FL_LAST) { /* we have to advance here */
ind++;
}
frag_adjust(dupper-1, 1);
}
/*
* If we found a block to relocate just do so.
*/
if(ind) {
for(i=0; i<ind; i++) {
if(!bp[i].old) { /* no more blocks listed */
/*
* XXX A relative blocknumber should not be
* zero, which is not explicitly
* guaranteed by our code.
*/
break;
}
/*
* Allocate a complete block in the same (current)
* cylinder group.
*/
bp[i].new=alloc()/sblock.fs_frag;
/*
* There is no frag_adjust() needed for the new block
* as it will have no fragments yet :-).
*/
for(f=bp[i].old*sblock.fs_frag,
g=bp[i].new*sblock.fs_frag;
f<(bp[i].old+1)*sblock.fs_frag;
f++, g++) {
if(isset(cg_blksfree(&aocg), f)) {
setbit(cg_blksfree(&acg), g);
acg.cg_cs.cs_nffree++;
sblock.fs_cstotal.cs_nffree++;
}
}
/*
* Special handling is required if this was the first
* block. We have to consider the fragments which were
* used by the cylinder summary in the original block
* which re to be free in the copy of our block. We
* have to be careful if this first block happens to
* be also the last block to be relocated.
*/
if(bp[i].flags & GFS_FL_FIRST) {
for(f=bp[i].old*sblock.fs_frag,
g=bp[i].new*sblock.fs_frag;
f<odupper;
f++, g++) {
setbit(cg_blksfree(&acg), g);
acg.cg_cs.cs_nffree++;
sblock.fs_cstotal.cs_nffree++;
}
if(!(bp[i].flags & GFS_FL_LAST)) {
frag_adjust(bp[i].new*sblock.fs_frag,1);
}
}
/*
* Special handling is required if this is the last
* block to be relocated.
*/
if(bp[i].flags & GFS_FL_LAST) {
frag_adjust(bp[i].new*sblock.fs_frag, 1);
frag_adjust(bp[i].old*sblock.fs_frag, -1);
for(f=dupper;
f<roundup(dupper, sblock.fs_frag);
f++) {
if(isclr(cg_blksfree(&acg), f)) {
setbit(cg_blksfree(&acg), f);
acg.cg_cs.cs_nffree++;
sblock.fs_cstotal.cs_nffree++;
}
}
frag_adjust(bp[i].old*sblock.fs_frag, 1);
}
/*
* !!! Attach the cylindergroup offset here.
*/
bp[i].old+=cbase/sblock.fs_frag;
bp[i].new+=cbase/sblock.fs_frag;
/*
* Copy the content of the block.
*/
/*
* XXX Here we will have to implement a copy on write
* in the case we have any active snapshots.
*/
rdfs(fsbtodb(&sblock, bp[i].old*sblock.fs_frag),
(size_t)sblock.fs_bsize, (void *)&ablk, fsi);
wtfs(fsbtodb(&sblock, bp[i].new*sblock.fs_frag),
(size_t)sblock.fs_bsize, (void *)&ablk, fso, Nflag);
DBG_DUMP_HEX(&sblock,
"copied full block",
(unsigned char *)&ablk);
DBG_PRINT2("scg (%d->%d) block relocated\n",
bp[i].old,
bp[i].new);
}
/*
* Now we have to update all references to any fragment which
* belongs to any block relocated. We iterate now over all
* cylinder groups, within those over all non zero length
* inodes.
*/
for(cylno=0; cylno<osblock.fs_ncg; cylno++) {
DBG_PRINT1("scg doing cg (%d)\n",
cylno);
for(inc=osblock.fs_ipg-1 ; inc>=0 ; inc--) {
updrefs(cylno, (ino_t)inc, bp, fsi, fso, Nflag);
}
}
/*
* All inodes are checked, now make sure the number of
* references found make sense.
*/
for(i=0; i<ind; i++) {
if(!bp[i].found || (bp[i].found>sblock.fs_frag)) {
warnx("error: %d refs found for block %d.",
bp[i].found, bp[i].old);
}
}
}
/*
* The following statistics are not changed here:
* sblock.fs_cstotal.cs_ndir
* sblock.fs_cstotal.cs_nifree
* The following statistics were already updated on the fly:
* sblock.fs_cstotal.cs_nffree
* sblock.fs_cstotal.cs_nbfree
* As the statistics for this cylinder group are ready, copy it to
* the summary information array.
*/
*cs = acg.cg_cs;
/*
* Write summary cylinder group back to disk.
*/
wtfs(fsbtodb(&sblock, cgtod(&sblock, ocscg)), (size_t)sblock.fs_cgsize,
(void *)&acg, fso, Nflag);
DBG_PRINT0("scg written\n");
DBG_DUMP_CG(&sblock,
"new summary cg",
&acg);
DBG_LEAVE;
return;
}
/* ************************************************************** rdfs ***** */
/*
* Here we read some block(s) from disk.
*/
static void
rdfs(ufs2_daddr_t bno, size_t size, void *bf, int fsi)
{
DBG_FUNC("rdfs")
ssize_t n;
DBG_ENTER;
if (lseek(fsi, (off_t)bno * DEV_BSIZE, 0) < 0) {
err(33, "rdfs: seek error: %ld", (long)bno);
}
n = read(fsi, bf, size);
if (n != (ssize_t)size) {
err(34, "rdfs: read error: %ld", (long)bno);
}
DBG_LEAVE;
return;
}
/* ************************************************************** wtfs ***** */
/*
* Here we write some block(s) to disk.
*/
static void
wtfs(ufs2_daddr_t bno, size_t size, void *bf, int fso, unsigned int Nflag)
{
DBG_FUNC("wtfs")
ssize_t n;
DBG_ENTER;
if (Nflag) {
DBG_LEAVE;
return;
}
if (lseek(fso, (off_t)bno * DEV_BSIZE, SEEK_SET) < 0) {
err(35, "wtfs: seek error: %ld", (long)bno);
}
n = write(fso, bf, size);
if (n != (ssize_t)size) {
err(36, "wtfs: write error: %ld", (long)bno);
}
DBG_LEAVE;
return;
}
/* ************************************************************* alloc ***** */
/*
* Here we allocate a free block in the current cylinder group. It is assumed,
* that acg contains the current cylinder group. As we may take a block from
* somewhere in the filesystem we have to handle cluster summary here.
*/
static ufs2_daddr_t
alloc(void)
{
DBG_FUNC("alloc")
ufs2_daddr_t d, blkno;
int lcs1, lcs2;
int l;
int csmin, csmax;
int dlower, dupper, dmax;
DBG_ENTER;
if (acg.cg_magic != CG_MAGIC) {
warnx("acg: bad magic number");
DBG_LEAVE;
return (0);
}
if (acg.cg_cs.cs_nbfree == 0) {
warnx("error: cylinder group ran out of space");
DBG_LEAVE;
return (0);
}
/*
* We start seeking for free blocks only from the space available after
* the end of the new grown cylinder summary. Otherwise we allocate a
* block here which we have to relocate a couple of seconds later again
* again, and we are not prepared to to this anyway.
*/
blkno=-1;
dlower=cgsblock(&sblock, acg.cg_cgx)-cgbase(&sblock, acg.cg_cgx);
dupper=cgdmin(&sblock, acg.cg_cgx)-cgbase(&sblock, acg.cg_cgx);
dmax=cgbase(&sblock, acg.cg_cgx)+sblock.fs_fpg;
if (dmax > sblock.fs_size) {
dmax = sblock.fs_size;
}
dmax-=cgbase(&sblock, acg.cg_cgx); /* retransform into cg */
csmin=sblock.fs_csaddr-cgbase(&sblock, acg.cg_cgx);
csmax=csmin+howmany(sblock.fs_cssize, sblock.fs_fsize);
DBG_PRINT3("seek range: dl=%d, du=%d, dm=%d\n",
dlower,
dupper,
dmax);
DBG_PRINT2("range cont: csmin=%d, csmax=%d\n",
csmin,
csmax);
for(d=0; (d<dlower && blkno==-1); d+=sblock.fs_frag) {
if(d>=csmin && d<=csmax) {
continue;
}
if(isblock(&sblock, cg_blksfree(&acg), fragstoblks(&sblock,
d))) {
blkno = fragstoblks(&sblock, d);/* Yeah found a block */
break;
}
}
for(d=dupper; (d<dmax && blkno==-1); d+=sblock.fs_frag) {
if(d>=csmin && d<=csmax) {
continue;
}
if(isblock(&sblock, cg_blksfree(&acg), fragstoblks(&sblock,
d))) {
blkno = fragstoblks(&sblock, d);/* Yeah found a block */
break;
}
}
if(blkno==-1) {
warnx("internal error: couldn't find promised block in cg");
DBG_LEAVE;
return (0);
}
/*
* This is needed if the block was found already in the first loop.
*/
d=blkstofrags(&sblock, blkno);
clrblock(&sblock, cg_blksfree(&acg), blkno);
if (sblock.fs_contigsumsize > 0) {
/*
* Handle the cluster allocation bitmap.
*/
clrbit(cg_clustersfree(&acg), blkno);
/*
* We possibly have split a cluster here, so we have to do
* recalculate the sizes of the remaining cluster halves now,
* and use them for updating the cluster summary information.
*
* Lets start with the blocks before our allocated block ...
*/
for(lcs1=0, l=blkno-1; lcs1<sblock.fs_contigsumsize;
l--, lcs1++ ) {
if(isclr(cg_clustersfree(&acg),l)){
break;
}
}
/*
* ... and continue with the blocks right after our allocated
* block.
*/
for(lcs2=0, l=blkno+1; lcs2<sblock.fs_contigsumsize;
l++, lcs2++ ) {
if(isclr(cg_clustersfree(&acg),l)){
break;
}
}
/*
* Now update all counters.
*/
cg_clustersum(&acg)[MIN(lcs1+lcs2+1,sblock.fs_contigsumsize)]--;
if(lcs1) {
cg_clustersum(&acg)[lcs1]++;
}
if(lcs2) {
cg_clustersum(&acg)[lcs2]++;
}
}
/*
* Update all statistics based on blocks.
*/
acg.cg_cs.cs_nbfree--;
sblock.fs_cstotal.cs_nbfree--;
DBG_LEAVE;
return (d);
}
/* *********************************************************** isblock ***** */
/*
* Here we check if all frags of a block are free. For more details again
* please see the source of newfs(8), as this function is taken over almost
* unchanged.
*/
static int
isblock(struct fs *fs, unsigned char *cp, int h)
{
DBG_FUNC("isblock")
unsigned char mask;
DBG_ENTER;
switch (fs->fs_frag) {
case 8:
DBG_LEAVE;
return (cp[h] == 0xff);
case 4:
mask = 0x0f << ((h & 0x1) << 2);
DBG_LEAVE;
return ((cp[h >> 1] & mask) == mask);
case 2:
mask = 0x03 << ((h & 0x3) << 1);
DBG_LEAVE;
return ((cp[h >> 2] & mask) == mask);
case 1:
mask = 0x01 << (h & 0x7);
DBG_LEAVE;
return ((cp[h >> 3] & mask) == mask);
default:
fprintf(stderr, "isblock bad fs_frag %d\n", fs->fs_frag);
DBG_LEAVE;
return (0);
}
}
/* ********************************************************** clrblock ***** */
/*
* Here we allocate a complete block in the block map. For more details again
* please see the source of newfs(8), as this function is taken over almost
* unchanged.
*/
static void
clrblock(struct fs *fs, unsigned char *cp, int h)
{
DBG_FUNC("clrblock")
DBG_ENTER;
switch ((fs)->fs_frag) {
case 8:
cp[h] = 0;
break;
case 4:
cp[h >> 1] &= ~(0x0f << ((h & 0x1) << 2));
break;
case 2:
cp[h >> 2] &= ~(0x03 << ((h & 0x3) << 1));
break;
case 1:
cp[h >> 3] &= ~(0x01 << (h & 0x7));
break;
default:
warnx("clrblock bad fs_frag %d", fs->fs_frag);
break;
}
DBG_LEAVE;
return;
}
/* ********************************************************** setblock ***** */
/*
* Here we free a complete block in the free block map. For more details again
* please see the source of newfs(8), as this function is taken over almost
* unchanged.
*/
static void
setblock(struct fs *fs, unsigned char *cp, int h)
{
DBG_FUNC("setblock")
DBG_ENTER;
switch (fs->fs_frag) {
case 8:
cp[h] = 0xff;
break;
case 4:
cp[h >> 1] |= (0x0f << ((h & 0x1) << 2));
break;
case 2:
cp[h >> 2] |= (0x03 << ((h & 0x3) << 1));
break;
case 1:
cp[h >> 3] |= (0x01 << (h & 0x7));
break;
default:
warnx("setblock bad fs_frag %d", fs->fs_frag);
break;
}
DBG_LEAVE;
return;
}
/* ************************************************************ ginode ***** */
/*
* This function provides access to an individual inode. We find out in which
* block the requested inode is located, read it from disk if needed, and
* return the pointer into that block. We maintain a cache of one block to
* not read the same block again and again if we iterate linearly over all
* inodes.
*/
static union dinode *
ginode(ino_t inumber, int fsi, int cg)
{
DBG_FUNC("ginode")
static ino_t startinum = 0; /* first inode in cached block */
DBG_ENTER;
inumber += (cg * sblock.fs_ipg);
if (inumber < ROOTINO || inumber > maxino)
errx(8, "bad inode number %d to ginode", inumber);
if (startinum == 0 ||
inumber < startinum || inumber >= startinum + INOPB(&sblock)) {
inoblk = fsbtodb(&sblock, ino_to_fsba(&sblock, inumber));
rdfs(inoblk, (size_t)sblock.fs_bsize, inobuf, fsi);
startinum = (inumber / INOPB(&sblock)) * INOPB(&sblock);
}
DBG_LEAVE;
if (sblock.fs_magic == FS_UFS1_MAGIC)
return ((union dinode *)
&((struct ufs1_dinode *)inobuf)[inumber % INOPB(&sblock)]);
return ((union dinode *)
&((struct ufs2_dinode *)inobuf)[inumber % INOPB(&sblock)]);
}
/* ****************************************************** charsperline ***** */
/*
* Figure out how many lines our current terminal has. For more details again
* please see the source of newfs(8), as this function is taken over almost
* unchanged.
*/
static int
charsperline(void)
{
DBG_FUNC("charsperline")
int columns;
char *cp;
struct winsize ws;
DBG_ENTER;
columns = 0;
if (ioctl(0, TIOCGWINSZ, &ws) != -1) {
columns = ws.ws_col;
}
if (columns == 0 && (cp = getenv("COLUMNS"))) {
columns = atoi(cp);
}
if (columns == 0) {
columns = 80; /* last resort */
}
DBG_LEAVE;
return columns;
}
/* ************************************************************** main ***** */
/*
* growfs(8) is a utility which allows to increase the size of an existing
* ufs filesystem. Currently this can only be done on unmounted file system.
* It recognizes some command line options to specify the new desired size,
* and it does some basic checkings. The old filesystem size is determined
* and after some more checks like we can really access the new last block
* on the disk etc. we calculate the new parameters for the superblock. After
* having done this we just call growfs() which will do the work. Before
* we finish the only thing left is to update the disklabel.
* We still have to provide support for snapshots. Therefore we first have to
* understand what data structures are always replicated in the snapshot on
* creation, for all other blocks we touch during our procedure, we have to
* keep the old blocks unchanged somewhere available for the snapshots. If we
* are lucky, then we only have to handle our blocks to be relocated in that
* way.
* Also we have to consider in what order we actually update the critical
* data structures of the filesystem to make sure, that in case of a disaster
* fsck(8) is still able to restore any lost data.
* The foreseen last step then will be to provide for growing even mounted
* file systems. There we have to extend the mount() system call to provide
* userland access to the filesystem locking facility.
*/
int
main(int argc, char **argv)
{
DBG_FUNC("main")
char *device, *special, *cp;
char ch;
unsigned int size=0;
size_t len;
unsigned int Nflag=0;
int ExpertFlag=0;
struct stat st;
struct disklabel *lp;
struct partition *pp;
int i,fsi,fso;
char reply[5];
#ifdef FSMAXSNAP
int j;
#endif /* FSMAXSNAP */
DBG_ENTER;
while((ch=getopt(argc, argv, "Ns:vy")) != -1) {
switch(ch) {
case 'N':
Nflag=1;
break;
case 's':
size=(size_t)atol(optarg);
if(size<1) {
usage();
}
break;
case 'v': /* for compatibility to newfs */
break;
case 'y':
ExpertFlag=1;
break;
case '?':
/* FALLTHROUGH */
default:
usage();
}
}
argc -= optind;
argv += optind;
if(argc != 1) {
usage();
}
device=*argv;
/*
* Now try to guess the (raw)device name.
*/
if (0 == strrchr(device, '/')) {
/*
* No path prefix was given, so try in that order:
* /dev/r%s
* /dev/%s
* /dev/vinum/r%s
* /dev/vinum/%s.
*
* FreeBSD now doesn't distinguish between raw and block
* devices any longer, but it should still work this way.
*/
len=strlen(device)+strlen(_PATH_DEV)+2+strlen("vinum/");
special=(char *)malloc(len);
if(special == NULL) {
errx(1, "malloc failed");
}
snprintf(special, len, "%sr%s", _PATH_DEV, device);
if (stat(special, &st) == -1) {
snprintf(special, len, "%s%s", _PATH_DEV, device);
if (stat(special, &st) == -1) {
snprintf(special, len, "%svinum/r%s",
_PATH_DEV, device);
if (stat(special, &st) == -1) {
/* For now this is the 'last resort' */
snprintf(special, len, "%svinum/%s",
_PATH_DEV, device);
}
}
}
device = special;
}
/*
* Try to access our devices for writing ...
*/
if (Nflag) {
fso = -1;
} else {
fso = open(device, O_WRONLY);
if (fso < 0) {
err(1, "%s", device);
}
}
/*
* ... and reading.
*/
fsi = open(device, O_RDONLY);
if (fsi < 0) {
err(1, "%s", device);
}
/*
* Try to read a label and gess the slice if not specified. This
* code should guess the right thing and avaid to bother the user
* user with the task of specifying the option -v on vinum volumes.
*/
cp=device+strlen(device)-1;
lp = get_disklabel(fsi);
if(lp->d_type == DTYPE_VINUM) {
pp = &lp->d_partitions[0];
} else if (isdigit(*cp)) {
pp = &lp->d_partitions[2];
} else if (*cp>='a' && *cp<='h') {
pp = &lp->d_partitions[*cp - 'a'];
} else {
errx(1, "unknown device");
}
/*
* Check if that partition looks suited for growing a filesystem.
*/
if (pp->p_size < 1) {
errx(1, "partition is unavailable");
}
if (pp->p_fstype != FS_BSDFFS) {
errx(1, "partition not 4.2BSD");
}
/*
* Read the current superblock, and take a backup.
*/
for (i = 0; sblock_try[i] != -1; i++) {
sblockloc = sblock_try[i] / DEV_BSIZE;
rdfs(sblockloc, (size_t)SBLOCKSIZE, (void *)&(osblock), fsi);
if ((osblock.fs_magic == FS_UFS1_MAGIC ||
(osblock.fs_magic == FS_UFS2_MAGIC &&
osblock.fs_sblockloc ==
numfrags(&osblock, sblock_try[i]))) &&
osblock.fs_bsize <= MAXBSIZE &&
osblock.fs_bsize >= sizeof(struct fs))
break;
}
if (sblock_try[i] == -1) {
errx(1, "superblock not recognized");
}
memcpy((void *)&fsun1, (void *)&fsun2, sizeof(fsun2));
maxino = sblock.fs_ncg * sblock.fs_ipg;
DBG_OPEN("/tmp/growfs.debug"); /* already here we need a superblock */
DBG_DUMP_FS(&sblock,
"old sblock");
/*
* Determine size to grow to. Default to the full size specified in
* the disk label.
*/
sblock.fs_size = dbtofsb(&osblock, pp->p_size);
if (size != 0) {
if (size > pp->p_size){
errx(1, "There is not enough space (%d < %d)",
pp->p_size, size);
}
sblock.fs_size = dbtofsb(&osblock, size);
}
/*
* Are we really growing ?
*/
if(osblock.fs_size >= sblock.fs_size) {
errx(1, "we are not growing (%d->%d)", osblock.fs_size,
sblock.fs_size);
}
#ifdef FSMAXSNAP
/*
* Check if we find an active snapshot.
*/
if(ExpertFlag == 0) {
for(j=0; j<FSMAXSNAP; j++) {
if(sblock.fs_snapinum[j]) {
errx(1, "active snapshot found in filesystem\n"
" please remove all snapshots before "
"using growfs\n");
}
if(!sblock.fs_snapinum[j]) { /* list is dense */
break;
}
}
}
#endif
if (ExpertFlag == 0 && Nflag == 0) {
printf("We strongly recommend you to make a backup "
"before growing the Filesystem\n\n"
" Did you backup your data (Yes/No) ? ");
fgets(reply, (int)sizeof(reply), stdin);
if (strcmp(reply, "Yes\n")){
printf("\n Nothing done \n");
exit (0);
}
}
printf("new filesystemsize is: %d frags\n", sblock.fs_size);
/*
* Try to access our new last block in the filesystem. Even if we
* later on realize we have to abort our operation, on that block
* there should be no data, so we can't destroy something yet.
*/
wtfs((ufs2_daddr_t)pp->p_size-1, (size_t)DEV_BSIZE, (void *)&sblock,
fso, Nflag);
/*
* Now calculate new superblock values and check for reasonable
* bound for new filesystem size:
* fs_size: is derived from label or user input
* fs_dsize: should get updated in the routines creating or
* updating the cylinder groups on the fly
* fs_cstotal: should get updated in the routines creating or
* updating the cylinder groups
*/
/*
* Update the number of cylinders and cylinder groups in the filesystem.
*/
if (sblock.fs_magic == FS_UFS1_MAGIC) {
sblock.fs_old_ncyl =
sblock.fs_size * sblock.fs_old_nspf / sblock.fs_old_spc;
if (sblock.fs_size * sblock.fs_old_nspf >
sblock.fs_old_ncyl * sblock.fs_old_spc)
sblock.fs_old_ncyl++;
}
sblock.fs_ncg = howmany(sblock.fs_size, sblock.fs_fpg);
maxino = sblock.fs_ncg * sblock.fs_ipg;
if (sblock.fs_size % sblock.fs_fpg != 0 &&
sblock.fs_size % sblock.fs_fpg < cgdmin(&sblock, sblock.fs_ncg)) {
/*
* The space in the new last cylinder group is too small,
* so revert back.
*/
sblock.fs_ncg--;
if (sblock.fs_magic == FS_UFS1_MAGIC)
sblock.fs_old_ncyl = sblock.fs_ncg * sblock.fs_old_cpg;
printf("Warning: %d sector(s) cannot be allocated.\n",
fsbtodb(&sblock, sblock.fs_size % sblock.fs_fpg));
sblock.fs_size = sblock.fs_ncg * sblock.fs_fpg;
}
/*
* Update the space for the cylinder group summary information in the
* respective cylinder group data area.
*/
sblock.fs_cssize =
fragroundup(&sblock, sblock.fs_ncg * sizeof(struct csum));
if(osblock.fs_size >= sblock.fs_size) {
errx(1, "not enough new space");
}
DBG_PRINT0("sblock calculated\n");
/*
* Ok, everything prepared, so now let's do the tricks.
*/
growfs(fsi, fso, Nflag);
/*
* Update the disk label.
*/
pp->p_fsize = sblock.fs_fsize;
pp->p_frag = sblock.fs_frag;
pp->p_cpg = sblock.fs_fpg;
return_disklabel(fso, lp, Nflag);
DBG_PRINT0("label rewritten\n");
close(fsi);
if(fso>-1) close(fso);
DBG_CLOSE;
DBG_LEAVE;
return 0;
}
/* ************************************************** return_disklabel ***** */
/*
* Write the updated disklabel back to disk.
*/
static void
return_disklabel(int fd, struct disklabel *lp, unsigned int Nflag)
{
DBG_FUNC("return_disklabel")
u_short sum;
u_short *ptr;
DBG_ENTER;
if(!lp) {
DBG_LEAVE;
return;
}
if(!Nflag) {
lp->d_checksum=0;
sum = 0;
ptr=(u_short *)lp;
/*
* recalculate checksum
*/
while(ptr < (u_short *)&lp->d_partitions[lp->d_npartitions]) {
sum ^= *ptr++;
}
lp->d_checksum=sum;
if (ioctl(fd, DIOCWDINFO, (char *)lp) < 0) {
errx(1, "DIOCWDINFO failed");
}
}
free(lp);
DBG_LEAVE;
return ;
}
/* ***************************************************** get_disklabel ***** */
/*
* Read the disklabel from disk.
*/
static struct disklabel *
get_disklabel(int fd)
{
DBG_FUNC("get_disklabel")
static struct disklabel *lab;
DBG_ENTER;
lab=(struct disklabel *)malloc(sizeof(struct disklabel));
if (!lab) {
errx(1, "malloc failed");
}
if (ioctl(fd, DIOCGDINFO, (char *)lab) < 0) {
errx(1, "DIOCGDINFO failed");
}
DBG_LEAVE;
return (lab);
}
/* ************************************************************* usage ***** */
/*
* Dump a line of usage.
*/
static void
usage(void)
{
DBG_FUNC("usage")
DBG_ENTER;
fprintf(stderr, "usage: growfs [-Ny] [-s size] special\n");
DBG_LEAVE;
exit(1);
}
/* *********************************************************** updclst ***** */
/*
* This updates most paramters and the bitmap related to cluster. We have to
* assume, that sblock, osblock, acg are set up.
*/
static void
updclst(int block)
{
DBG_FUNC("updclst")
static int lcs=0;
DBG_ENTER;
if(sblock.fs_contigsumsize < 1) { /* no clustering */
return;
}
/*
* update cluster allocation map
*/
setbit(cg_clustersfree(&acg), block);
/*
* update cluster summary table
*/
if(!lcs) {
/*
* calculate size for the trailing cluster
*/
for(block--; lcs<sblock.fs_contigsumsize; block--, lcs++ ) {
if(isclr(cg_clustersfree(&acg), block)){
break;
}
}
}
if(lcs < sblock.fs_contigsumsize) {
if(lcs) {
cg_clustersum(&acg)[lcs]--;
}
lcs++;
cg_clustersum(&acg)[lcs]++;
}
DBG_LEAVE;
return;
}
/* *********************************************************** updrefs ***** */
/*
* This updates all references to relocated blocks for the given inode. The
* inode is given as number within the cylinder group, and the number of the
* cylinder group.
*/
static void
updrefs(int cg, ino_t in, struct gfs_bpp *bp, int fsi, int fso, unsigned int
Nflag)
{
DBG_FUNC("updrefs")
ufs_lbn_t len, lbn, numblks;
ufs2_daddr_t iptr, blksperindir;
union dinode *ino;
int i, mode, remaining_blocks, inodeupdated;
DBG_ENTER;
/*
* XXX We should skip unused inodes even from being read from disk
* here by using the bitmap.
*/
ino = ginode(in, fsi, cg);
mode = DIP(ino, di_mode) & IFMT;
if (mode != IFDIR && mode != IFREG && mode != IFLNK) {
DBG_LEAVE;
return; /* only check DIR, FILE, LINK */
}
if (mode == IFLNK && DIP(ino, di_size) < sblock.fs_maxsymlinklen) {
DBG_LEAVE;
return; /* skip short symlinks */
}
numblks = howmany(DIP(ino, di_size), sblock.fs_bsize);
if (numblks == 0) {
DBG_LEAVE;
return; /* skip empty file */
}
if (DIP(ino, di_blocks) == 0) {
DBG_LEAVE;
return; /* skip empty swiss cheesy file or old fastlink */
}
DBG_PRINT2("scg checking inode (%d in %d)\n",
in,
cg);
/*
* Check all the blocks.
*/
inodeupdated = 0;
len = numblks < NDADDR ? numblks : NDADDR;
for (i = 0; i < len; i++) {
iptr = DIP(ino, di_db[i]);
if (iptr == 0)
continue;
if (cond_bl_upd(&iptr, bp, fsi, fso, Nflag)) {
DIP(ino, di_db[i]) = iptr;
inodeupdated++;
}
}
DBG_PRINT0("~~scg direct blocks checked\n");
blksperindir = 1;
len = numblks - NDADDR;
lbn = NDADDR;
for (i = 0; len > 0 && i < NIADDR; i++) {
iptr = DIP(ino, di_ib[i]);
if (iptr == 0)
continue;
if (cond_bl_upd(&iptr, bp, fsi, fso, Nflag)) {
DIP(ino, di_ib[i]) = iptr;
inodeupdated++;
}
indirchk(blksperindir, lbn, iptr, numblks, bp, fsi, fso, Nflag);
blksperindir *= NINDIR(&sblock);
lbn += blksperindir;
len -= blksperindir;
DBG_PRINT1("scg indirect_%d blocks checked\n", i + 1);
}
if (inodeupdated)
wtfs(inoblk, sblock.fs_bsize, inobuf, fso, Nflag);
DBG_LEAVE;
return;
}
/*
* Recursively check all the indirect blocks.
*/
static void
indirchk(ufs_lbn_t blksperindir, ufs_lbn_t lbn, ufs2_daddr_t blkno,
ufs_lbn_t lastlbn, struct gfs_bpp *bp, int fsi, int fso, unsigned int Nflag)
{
DBG_FUNC("indirchk")
void *ibuf;
off_t offset;
int i, last;
ufs2_daddr_t iptr;
DBG_ENTER;
/* read in the indirect block. */
ibuf = malloc(sblock.fs_bsize);
if (!ibuf)
errx(1, "malloc failed");
rdfs(fsbtodb(&sblock, blkno), (size_t)sblock.fs_bsize, ibuf, fsi);
last = howmany(lastlbn - lbn, blksperindir) < NINDIR(&sblock) ?
howmany(lastlbn - lbn, blksperindir) : NINDIR(&sblock);
for (i = 0; i < last; i++) {
if (sblock.fs_magic == FS_UFS1_MAGIC)
iptr = ((ufs1_daddr_t *)ibuf)[i];
else
iptr = ((ufs2_daddr_t *)ibuf)[i];
if (iptr == 0)
continue;
if (cond_bl_upd(&iptr, bp, fsi, fso, Nflag)) {
if (sblock.fs_magic == FS_UFS1_MAGIC)
((ufs1_daddr_t *)ibuf)[i] = iptr;
else
((ufs2_daddr_t *)ibuf)[i] = iptr;
}
if (blksperindir == 1)
continue;
indirchk(blksperindir / NINDIR(&sblock), lbn + blksperindir * i,
iptr, lastlbn, bp, fsi, fso, Nflag);
}
free(ibuf);
DBG_LEAVE;
return;
}
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