sanchayanmaity
/
minix
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
minix/usr.sbin/makefs/ffs.c

1156 lines
33 KiB
C
Raw Blame History

/* $NetBSD: ffs.c,v 1.63 2013/06/23 02:06:06 dholland Exp $ */
/*
* Copyright (c) 2001 Wasabi Systems, Inc.
* All rights reserved.
*
* Written by Luke Mewburn for Wasabi Systems, Inc.
*
* 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 for the NetBSD Project by
* Wasabi Systems, Inc.
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
* or promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Copyright (c) 1982, 1986, 1989, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. 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.
*
* @(#)ffs_alloc.c 8.19 (Berkeley) 7/13/95
*/
#if HAVE_NBTOOL_CONFIG_H
#include "nbtool_config.h"
#endif
#include <sys/cdefs.h>
#if defined(__RCSID) && !defined(__lint)
__RCSID("$NetBSD: ffs.c,v 1.63 2013/06/23 02:06:06 dholland Exp $");
#endif /* !__lint */
#include <sys/param.h>
#if !HAVE_NBTOOL_CONFIG_H
#include <sys/mount.h>
#endif
#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <util.h>
#include "makefs.h"
#include "ffs.h"
#if HAVE_STRUCT_STATVFS_F_IOSIZE && HAVE_FSTATVFS
#include <sys/statvfs.h>
#endif
#include <ufs/ufs/dinode.h>
#include <ufs/ufs/dir.h>
#include <ufs/ffs/fs.h>
#include <ufs/ufs/ufs_bswap.h>
#include "ffs/ufs_inode.h"
#include "ffs/newfs_extern.h"
#include "ffs/ffs_extern.h"
#undef DIP
#define DIP(dp, field) \
((ffs_opts->version == 1) ? \
(dp)->ffs1_din.di_##field : (dp)->ffs2_din.di_##field)
/*
* Various file system defaults (cribbed from newfs(8)).
*/
#define DFL_FRAGSIZE 1024 /* fragment size */
#define DFL_BLKSIZE 8192 /* block size */
#define DFL_SECSIZE 512 /* sector size */
#define DFL_CYLSPERGROUP 65536 /* cylinders per group */
#define DFL_FRAGSPERINODE 4 /* fragments per inode */
#define DFL_ROTDELAY 0 /* rotational delay */
#define DFL_NRPOS 1 /* rotational positions */
#define DFL_RPM 3600 /* rpm of disk */
#define DFL_NSECTORS 64 /* # of sectors */
#define DFL_NTRACKS 16 /* # of tracks */
typedef struct {
u_char *buf; /* buf for directory */
doff_t size; /* full size of buf */
doff_t cur; /* offset of current entry */
} dirbuf_t;
static int ffs_create_image(const char *, fsinfo_t *);
static void ffs_dump_fsinfo(fsinfo_t *);
static void ffs_dump_dirbuf(dirbuf_t *, const char *, int);
static void ffs_make_dirbuf(dirbuf_t *, const char *, fsnode *, int);
static int ffs_populate_dir(const char *, fsnode *, fsinfo_t *);
static void ffs_size_dir(fsnode *, fsinfo_t *);
static void ffs_validate(const char *, fsnode *, fsinfo_t *);
static void ffs_write_file(union dinode *, uint32_t, void *, fsinfo_t *);
static void ffs_write_inode(union dinode *, uint32_t, const fsinfo_t *);
static void *ffs_build_dinode1(struct ufs1_dinode *, dirbuf_t *, fsnode *,
fsnode *, fsinfo_t *);
static void *ffs_build_dinode2(struct ufs2_dinode *, dirbuf_t *, fsnode *,
fsnode *, fsinfo_t *);
/* publically visible functions */
void
ffs_prep_opts(fsinfo_t *fsopts)
{
ffs_opt_t *ffs_opts = ecalloc(1, sizeof(*ffs_opts));
const option_t ffs_options[] = {
{ 'b', "bsize", &ffs_opts->bsize, OPT_INT32,
1, INT_MAX, "block size" },
{ 'f', "fsize", &ffs_opts->fsize, OPT_INT32,
1, INT_MAX, "fragment size" },
{ 'd', "density", &ffs_opts->density, OPT_INT32,
1, INT_MAX, "bytes per inode" },
{ 'm', "minfree", &ffs_opts->minfree, OPT_INT32,
0, 99, "minfree" },
{ 'M', "maxbpf", &ffs_opts->maxbpg, OPT_INT32,
1, INT_MAX, "max blocks per file in a cg" },
{ 'a', "avgfilesize", &ffs_opts->avgfilesize, OPT_INT32,
1, INT_MAX, "expected average file size" },
{ 'n', "avgfpdir", &ffs_opts->avgfpdir, OPT_INT32,
1, INT_MAX, "expected # of files per directory" },
{ 'x', "extent", &ffs_opts->maxbsize, OPT_INT32,
1, INT_MAX, "maximum # extent size" },
{ 'g', "maxbpcg", &ffs_opts->maxblkspercg, OPT_INT32,
1, INT_MAX, "max # of blocks per group" },
{ 'v', "version", &ffs_opts->version, OPT_INT32,
1, 2, "UFS version" },
{ 'o', "optimization", NULL, OPT_STRBUF,
0, 0, "Optimization (time|space)" },
{ 'l', "label", ffs_opts->label, OPT_STRARRAY,
1, sizeof(ffs_opts->label), "UFS label" },
{ .name = NULL }
};
ffs_opts->bsize= -1;
ffs_opts->fsize= -1;
ffs_opts->cpg= -1;
ffs_opts->density= -1;
ffs_opts->minfree= -1;
ffs_opts->optimization= -1;
ffs_opts->maxcontig= -1;
ffs_opts->maxbpg= -1;
ffs_opts->avgfilesize= -1;
ffs_opts->avgfpdir= -1;
ffs_opts->version = 1;
fsopts->fs_specific = ffs_opts;
fsopts->fs_options = copy_opts(ffs_options);
}
void
ffs_cleanup_opts(fsinfo_t *fsopts)
{
free(fsopts->fs_specific);
free(fsopts->fs_options);
}
int
ffs_parse_opts(const char *option, fsinfo_t *fsopts)
{
ffs_opt_t *ffs_opts = fsopts->fs_specific;
option_t *ffs_options = fsopts->fs_options;
char buf[1024];
int rv;
assert(option != NULL);
assert(fsopts != NULL);
assert(ffs_opts != NULL);
if (debug & DEBUG_FS_PARSE_OPTS)
printf("ffs_parse_opts: got `%s'\n", option);
rv = set_option(ffs_options, option, buf, sizeof(buf));
if (rv == -1)
return 0;
if (ffs_options[rv].name == NULL)
abort();
switch (ffs_options[rv].letter) {
case 'o':
if (strcmp(buf, "time") == 0) {
ffs_opts->optimization = FS_OPTTIME;
} else if (strcmp(buf, "space") == 0) {
ffs_opts->optimization = FS_OPTSPACE;
} else {
warnx("Invalid optimization `%s'", buf);
return 0;
}
break;
default:
break;
}
return 1;
}
void
ffs_makefs(const char *image, const char *dir, fsnode *root, fsinfo_t *fsopts)
{
struct fs *superblock;
struct timeval start;
assert(image != NULL);
assert(dir != NULL);
assert(root != NULL);
assert(fsopts != NULL);
if (debug & DEBUG_FS_MAKEFS)
printf("ffs_makefs: image %s directory %s root %p\n",
image, dir, root);
/* validate tree and options */
TIMER_START(start);
ffs_validate(dir, root, fsopts);
TIMER_RESULTS(start, "ffs_validate");
printf("Calculated size of `%s': %lld bytes, %lld inodes\n",
image, (long long)fsopts->size, (long long)fsopts->inodes);
/* create image */
TIMER_START(start);
if (ffs_create_image(image, fsopts) == -1)
errx(1, "Image file `%s' not created.", image);
TIMER_RESULTS(start, "ffs_create_image");
fsopts->curinode = UFS_ROOTINO;
if (debug & DEBUG_FS_MAKEFS)
putchar('\n');
/* populate image */
printf("Populating `%s'\n", image);
TIMER_START(start);
if (! ffs_populate_dir(dir, root, fsopts))
errx(1, "Image file `%s' not populated.", image);
TIMER_RESULTS(start, "ffs_populate_dir");
/* ensure no outstanding buffers remain */
if (debug & DEBUG_FS_MAKEFS)
bcleanup();
/* update various superblock parameters */
superblock = fsopts->superblock;
superblock->fs_fmod = 0;
superblock->fs_old_cstotal.cs_ndir = superblock->fs_cstotal.cs_ndir;
superblock->fs_old_cstotal.cs_nbfree = superblock->fs_cstotal.cs_nbfree;
superblock->fs_old_cstotal.cs_nifree = superblock->fs_cstotal.cs_nifree;
superblock->fs_old_cstotal.cs_nffree = superblock->fs_cstotal.cs_nffree;
/* write out superblock; image is now complete */
ffs_write_superblock(fsopts->superblock, fsopts);
if (close(fsopts->fd) == -1)
err(1, "Closing `%s'", image);
fsopts->fd = -1;
printf("Image `%s' complete\n", image);
}
/* end of public functions */
static void
ffs_validate(const char *dir, fsnode *root, fsinfo_t *fsopts)
{
int32_t ncg = 1;
#if notyet
int32_t spc, nspf, ncyl, fssize;
#endif
ffs_opt_t *ffs_opts = fsopts->fs_specific;
assert(dir != NULL);
assert(root != NULL);
assert(fsopts != NULL);
assert(ffs_opts != NULL);
if (debug & DEBUG_FS_VALIDATE) {
printf("ffs_validate: before defaults set:\n");
ffs_dump_fsinfo(fsopts);
}
/* set FFS defaults */
if (fsopts->sectorsize == -1)
fsopts->sectorsize = DFL_SECSIZE;
if (ffs_opts->fsize == -1)
ffs_opts->fsize = MAX(DFL_FRAGSIZE, fsopts->sectorsize);
if (ffs_opts->bsize == -1)
ffs_opts->bsize = MIN(DFL_BLKSIZE, 8 * ffs_opts->fsize);
if (ffs_opts->cpg == -1)
ffs_opts->cpg = DFL_CYLSPERGROUP;
else
ffs_opts->cpgflg = 1;
/* fsopts->density is set below */
if (ffs_opts->nsectors == -1)
ffs_opts->nsectors = DFL_NSECTORS;
if (ffs_opts->minfree == -1)
ffs_opts->minfree = MINFREE;
if (ffs_opts->optimization == -1)
ffs_opts->optimization = DEFAULTOPT;
if (ffs_opts->maxcontig == -1)
ffs_opts->maxcontig =
MAX(1, MIN(MAXPHYS, FFS_MAXBSIZE) / ffs_opts->bsize);
/* XXX ondisk32 */
if (ffs_opts->maxbpg == -1)
ffs_opts->maxbpg = ffs_opts->bsize / sizeof(int32_t);
if (ffs_opts->avgfilesize == -1)
ffs_opts->avgfilesize = AVFILESIZ;
if (ffs_opts->avgfpdir == -1)
ffs_opts->avgfpdir = AFPDIR;
/* calculate size of tree */
ffs_size_dir(root, fsopts);
fsopts->inodes += UFS_ROOTINO; /* include first two inodes */
if (debug & DEBUG_FS_VALIDATE)
printf("ffs_validate: size of tree: %lld bytes, %lld inodes\n",
(long long)fsopts->size, (long long)fsopts->inodes);
/* add requested slop */
fsopts->size += fsopts->freeblocks;
fsopts->inodes += fsopts->freefiles;
if (fsopts->freefilepc > 0)
fsopts->inodes =
fsopts->inodes * (100 + fsopts->freefilepc) / 100;
if (fsopts->freeblockpc > 0)
fsopts->size =
fsopts->size * (100 + fsopts->freeblockpc) / 100;
/* add space needed for superblocks */
/*
* The old SBOFF (SBLOCK_UFS1) is used here because makefs is
* typically used for small filesystems where space matters.
* XXX make this an option.
*/
fsopts->size += (SBLOCK_UFS1 + SBLOCKSIZE) * ncg;
/* add space needed to store inodes, x3 for blockmaps, etc */
if (ffs_opts->version == 1)
fsopts->size += ncg * DINODE1_SIZE *
roundup(fsopts->inodes / ncg,
ffs_opts->bsize / DINODE1_SIZE);
else
fsopts->size += ncg * DINODE2_SIZE *
roundup(fsopts->inodes / ncg,
ffs_opts->bsize / DINODE2_SIZE);
/* add minfree */
if (ffs_opts->minfree > 0)
fsopts->size =
fsopts->size * (100 + ffs_opts->minfree) / 100;
/*
* XXX any other fs slop to add, such as csum's, bitmaps, etc ??
*/
if (fsopts->size < fsopts->minsize) /* ensure meets minimum size */
fsopts->size = fsopts->minsize;
/* round up to the next block */
fsopts->size = roundup(fsopts->size, ffs_opts->bsize);
/* calculate density if necessary */
if (ffs_opts->density == -1)
ffs_opts->density = fsopts->size / fsopts->inodes + 1;
if (debug & DEBUG_FS_VALIDATE) {
printf("ffs_validate: after defaults set:\n");
ffs_dump_fsinfo(fsopts);
printf("ffs_validate: dir %s; %lld bytes, %lld inodes\n",
dir, (long long)fsopts->size, (long long)fsopts->inodes);
}
/* now check calculated sizes vs requested sizes */
if (fsopts->maxsize > 0 && fsopts->size > fsopts->maxsize) {
errx(1, "`%s' size of %lld is larger than the maxsize of %lld.",
dir, (long long)fsopts->size, (long long)fsopts->maxsize);
}
}
static void
ffs_dump_fsinfo(fsinfo_t *f)
{
ffs_opt_t *fs = f->fs_specific;
printf("fsopts at %p\n", f);
printf("\tsize %lld, inodes %lld, curinode %u\n",
(long long)f->size, (long long)f->inodes, f->curinode);
printf("\tminsize %lld, maxsize %lld\n",
(long long)f->minsize, (long long)f->maxsize);
printf("\tfree files %lld, freefile %% %d\n",
(long long)f->freefiles, f->freefilepc);
printf("\tfree blocks %lld, freeblock %% %d\n",
(long long)f->freeblocks, f->freeblockpc);
printf("\tneedswap %d, sectorsize %d\n", f->needswap, f->sectorsize);
printf("\tbsize %d, fsize %d, cpg %d, density %d\n",
fs->bsize, fs->fsize, fs->cpg, fs->density);
printf("\tnsectors %d, rpm %d, minfree %d\n",
fs->nsectors, fs->rpm, fs->minfree);
printf("\tmaxcontig %d, maxbpg %d\n",
fs->maxcontig, fs->maxbpg);
printf("\toptimization %s\n",
fs->optimization == FS_OPTSPACE ? "space" : "time");
}
static int
ffs_create_image(const char *image, fsinfo_t *fsopts)
{
#if HAVE_STRUCT_STATVFS_F_IOSIZE && HAVE_FSTATVFS
struct statvfs sfs;
#endif
struct fs *fs;
char *buf;
int i, bufsize;
off_t bufrem;
int oflags = O_RDWR | O_CREAT;
assert (image != NULL);
assert (fsopts != NULL);
/* create image */
if (fsopts->offset == 0)
oflags |= O_TRUNC;
if ((fsopts->fd = open(image, oflags, 0666)) == -1) {
warn("Can't open `%s' for writing", image);
return (-1);
}
/* zero image */
#if HAVE_STRUCT_STATVFS_F_IOSIZE && HAVE_FSTATVFS
if (fstatvfs(fsopts->fd, &sfs) == -1) {
#endif
bufsize = 8192;
#if HAVE_STRUCT_STATVFS_F_IOSIZE && HAVE_FSTATVFS
warn("can't fstatvfs `%s', using default %d byte chunk",
image, bufsize);
} else
bufsize = sfs.f_iosize;
#endif
bufrem = fsopts->size;
if (fsopts->sparse) {
if (ftruncate(fsopts->fd, bufrem) == -1) {
printf ("ERROR in truncate. Sparse option disabled\n");
fsopts->sparse = 0;
} else {
bufrem = 0; /* File truncated at bufrem. Remaining is 0 */
buf = NULL;
}
}
if (fsopts->offset != 0)
if (lseek(fsopts->fd, fsopts->offset, SEEK_SET) == -1) {
warn("can't seek");
return -1;
}
if ((debug & DEBUG_FS_CREATE_IMAGE) && fsopts->sparse == 0)
printf(
"zero-ing image `%s', %lld sectors, using %d byte chunks\n",
image, (long long)bufrem, bufsize);
if (bufrem > 0)
buf = ecalloc(1, bufsize);
while (bufrem > 0) {
i = write(fsopts->fd, buf, MIN(bufsize, bufrem));
if (i == -1) {
warn("zeroing image, %lld bytes to go",
(long long)bufrem);
free(buf);
return (-1);
}
bufrem -= i;
}
if (buf)
free(buf);
/* make the file system */
if (debug & DEBUG_FS_CREATE_IMAGE)
printf("calling mkfs(\"%s\", ...)\n", image);
fs = ffs_mkfs(image, fsopts);
fsopts->superblock = (void *)fs;
if (debug & DEBUG_FS_CREATE_IMAGE) {
time_t t;
t = (time_t)((struct fs *)fsopts->superblock)->fs_time;
printf("mkfs returned %p; fs_time %s",
fsopts->superblock, ctime(&t));
printf("fs totals: nbfree %lld, nffree %lld, nifree %lld, ndir %lld\n",
(long long)fs->fs_cstotal.cs_nbfree,
(long long)fs->fs_cstotal.cs_nffree,
(long long)fs->fs_cstotal.cs_nifree,
(long long)fs->fs_cstotal.cs_ndir);
}
if ((off_t)(fs->fs_cstotal.cs_nifree + UFS_ROOTINO) < fsopts->inodes) {
warnx(
"Image file `%s' has %lld free inodes; %lld are required.",
image,
(long long)(fs->fs_cstotal.cs_nifree + UFS_ROOTINO),
(long long)fsopts->inodes);
return (-1);
}
return (fsopts->fd);
}
static void
ffs_size_dir(fsnode *root, fsinfo_t *fsopts)
{
struct direct tmpdir;
fsnode * node;
int curdirsize, this;
ffs_opt_t *ffs_opts = fsopts->fs_specific;
/* node may be NULL (empty directory) */
assert(fsopts != NULL);
assert(ffs_opts != NULL);
if (debug & DEBUG_FS_SIZE_DIR)
printf("ffs_size_dir: entry: bytes %lld inodes %lld\n",
(long long)fsopts->size, (long long)fsopts->inodes);
#define ADDDIRENT(e) do { \
tmpdir.d_namlen = strlen((e)); \
this = UFS_DIRSIZ(0, &tmpdir, 0); \
if (debug & DEBUG_FS_SIZE_DIR_ADD_DIRENT) \
printf("ADDDIRENT: was: %s (%d) this %d cur %d\n", \
e, tmpdir.d_namlen, this, curdirsize); \
if (this + curdirsize > roundup(curdirsize, UFS_DIRBLKSIZ)) \
curdirsize = roundup(curdirsize, UFS_DIRBLKSIZ); \
curdirsize += this; \
if (debug & DEBUG_FS_SIZE_DIR_ADD_DIRENT) \
printf("ADDDIRENT: now: %s (%d) this %d cur %d\n", \
e, tmpdir.d_namlen, this, curdirsize); \
} while (0);
/*
* XXX this needs to take into account extra space consumed
* by indirect blocks, etc.
*/
#define ADDSIZE(x) do { \
fsopts->size += roundup((x), ffs_opts->fsize); \
} while (0);
curdirsize = 0;
for (node = root; node != NULL; node = node->next) {
ADDDIRENT(node->name);
if (node == root) { /* we're at "." */
assert(strcmp(node->name, ".") == 0);
ADDDIRENT("..");
} else if ((node->inode->flags & FI_SIZED) == 0) {
/* don't count duplicate names */
node->inode->flags |= FI_SIZED;
if (debug & DEBUG_FS_SIZE_DIR_NODE)
printf("ffs_size_dir: `%s' size %lld\n",
node->name,
(long long)node->inode->st.st_size);
fsopts->inodes++;
if (node->type == S_IFREG)
ADDSIZE(node->inode->st.st_size);
if (node->type == S_IFLNK) {
size_t slen;
slen = strlen(node->symlink) + 1;
if (slen >= (ffs_opts->version == 1 ?
UFS1_MAXSYMLINKLEN :
UFS2_MAXSYMLINKLEN))
ADDSIZE(slen);
}
}
if (node->type == S_IFDIR)
ffs_size_dir(node->child, fsopts);
}
ADDSIZE(curdirsize);
if (debug & DEBUG_FS_SIZE_DIR)
printf("ffs_size_dir: exit: size %lld inodes %lld\n",
(long long)fsopts->size, (long long)fsopts->inodes);
}
static void *
ffs_build_dinode1(struct ufs1_dinode *dinp, dirbuf_t *dbufp, fsnode *cur,
fsnode *root, fsinfo_t *fsopts)
{
size_t slen;
void *membuf;
memset(dinp, 0, sizeof(*dinp));
dinp->di_mode = cur->inode->st.st_mode;
dinp->di_nlink = cur->inode->nlink;
dinp->di_size = cur->inode->st.st_size;
dinp->di_atime = cur->inode->st.st_atime;
dinp->di_mtime = cur->inode->st.st_mtime;
dinp->di_ctime = cur->inode->st.st_ctime;
#if HAVE_STRUCT_STAT_ST_MTIMENSEC
dinp->di_atimensec = cur->inode->st.st_atimensec;
dinp->di_mtimensec = cur->inode->st.st_mtimensec;
dinp->di_ctimensec = cur->inode->st.st_ctimensec;
#endif
#if HAVE_STRUCT_STAT_ST_FLAGS
dinp->di_flags = cur->inode->st.st_flags;
#endif
#if HAVE_STRUCT_STAT_ST_GEN
dinp->di_gen = cur->inode->st.st_gen;
#endif
dinp->di_uid = cur->inode->st.st_uid;
dinp->di_gid = cur->inode->st.st_gid;
/* not set: di_db, di_ib, di_blocks, di_spare */
membuf = NULL;
if (cur == root) { /* "."; write dirbuf */
membuf = dbufp->buf;
dinp->di_size = dbufp->size;
} else if (S_ISBLK(cur->type) || S_ISCHR(cur->type)) {
dinp->di_size = 0; /* a device */
dinp->di_rdev =
ufs_rw32(cur->inode->st.st_rdev, fsopts->needswap);
} else if (S_ISLNK(cur->type)) { /* symlink */
slen = strlen(cur->symlink);
if (slen < UFS1_MAXSYMLINKLEN) { /* short link */
memcpy(dinp->di_db, cur->symlink, slen);
} else
membuf = cur->symlink;
dinp->di_size = slen;
}
return membuf;
}
static void *
ffs_build_dinode2(struct ufs2_dinode *dinp, dirbuf_t *dbufp, fsnode *cur,
fsnode *root, fsinfo_t *fsopts)
{
size_t slen;
void *membuf;
memset(dinp, 0, sizeof(*dinp));
dinp->di_mode = cur->inode->st.st_mode;
dinp->di_nlink = cur->inode->nlink;
dinp->di_size = cur->inode->st.st_size;
dinp->di_atime = cur->inode->st.st_atime;
dinp->di_mtime = cur->inode->st.st_mtime;
dinp->di_ctime = cur->inode->st.st_ctime;
#if HAVE_STRUCT_STAT_ST_MTIMENSEC
dinp->di_atimensec = cur->inode->st.st_atimensec;
dinp->di_mtimensec = cur->inode->st.st_mtimensec;
dinp->di_ctimensec = cur->inode->st.st_ctimensec;
#endif
#if HAVE_STRUCT_STAT_ST_FLAGS
dinp->di_flags = cur->inode->st.st_flags;
#endif
#if HAVE_STRUCT_STAT_ST_GEN
dinp->di_gen = cur->inode->st.st_gen;
#endif
#if HAVE_STRUCT_STAT_BIRTHTIME
dinp->di_birthtime = cur->inode->st.st_birthtime;
dinp->di_birthnsec = cur->inode->st.st_birthtimensec;
#endif
dinp->di_uid = cur->inode->st.st_uid;
dinp->di_gid = cur->inode->st.st_gid;
/* not set: di_db, di_ib, di_blocks, di_spare */
membuf = NULL;
if (cur == root) { /* "."; write dirbuf */
membuf = dbufp->buf;
dinp->di_size = dbufp->size;
} else if (S_ISBLK(cur->type) || S_ISCHR(cur->type)) {
dinp->di_size = 0; /* a device */
dinp->di_rdev =
ufs_rw64(cur->inode->st.st_rdev, fsopts->needswap);
} else if (S_ISLNK(cur->type)) { /* symlink */
slen = strlen(cur->symlink);
if (slen < UFS2_MAXSYMLINKLEN) { /* short link */
memcpy(dinp->di_db, cur->symlink, slen);
} else
membuf = cur->symlink;
dinp->di_size = slen;
}
return membuf;
}
static int
ffs_populate_dir(const char *dir, fsnode *root, fsinfo_t *fsopts)
{
fsnode *cur;
dirbuf_t dirbuf;
union dinode din;
void *membuf;
char path[MAXPATHLEN + 1];
ffs_opt_t *ffs_opts = fsopts->fs_specific;
assert(dir != NULL);
assert(root != NULL);
assert(fsopts != NULL);
assert(ffs_opts != NULL);
(void)memset(&dirbuf, 0, sizeof(dirbuf));
if (debug & DEBUG_FS_POPULATE)
printf("ffs_populate_dir: PASS 1 dir %s node %p\n", dir, root);
/*
* pass 1: allocate inode numbers, build directory `file'
*/
for (cur = root; cur != NULL; cur = cur->next) {
if ((cur->inode->flags & FI_ALLOCATED) == 0) {
cur->inode->flags |= FI_ALLOCATED;
if (cur == root && cur->parent != NULL)
cur->inode->ino = cur->parent->inode->ino;
else {
cur->inode->ino = fsopts->curinode;
fsopts->curinode++;
}
}
ffs_make_dirbuf(&dirbuf, cur->name, cur, fsopts->needswap);
if (cur == root) { /* we're at "."; add ".." */
ffs_make_dirbuf(&dirbuf, "..",
cur->parent == NULL ? cur : cur->parent->first,
fsopts->needswap);
root->inode->nlink++; /* count my parent's link */
} else if (cur->child != NULL)
root->inode->nlink++; /* count my child's link */
/*
* XXX possibly write file and long symlinks here,
* ensuring that blocks get written before inodes?
* otoh, this isn't a real filesystem, so who
* cares about ordering? :-)
*/
}
if (debug & DEBUG_FS_POPULATE_DIRBUF)
ffs_dump_dirbuf(&dirbuf, dir, fsopts->needswap);
/*
* pass 2: write out dirbuf, then non-directories at this level
*/
if (debug & DEBUG_FS_POPULATE)
printf("ffs_populate_dir: PASS 2 dir %s\n", dir);
for (cur = root; cur != NULL; cur = cur->next) {
if (cur->inode->flags & FI_WRITTEN)
continue; /* skip hard-linked entries */
cur->inode->flags |= FI_WRITTEN;
if ((size_t)snprintf(path, sizeof(path), "%s/%s/%s", cur->root,
cur->path, cur->name) >= sizeof(path))
errx(1, "Pathname too long.");
if (cur->child != NULL)
continue; /* child creates own inode */
/* build on-disk inode */
if (ffs_opts->version == 1)
membuf = ffs_build_dinode1(&din.ffs1_din, &dirbuf, cur,
root, fsopts);
else
membuf = ffs_build_dinode2(&din.ffs2_din, &dirbuf, cur,
root, fsopts);
if (debug & DEBUG_FS_POPULATE_NODE) {
printf("ffs_populate_dir: writing ino %d, %s",
cur->inode->ino, inode_type(cur->type));
if (cur->inode->nlink > 1)
printf(", nlink %d", cur->inode->nlink);
putchar('\n');
}
if (membuf != NULL) {
ffs_write_file(&din, cur->inode->ino, membuf, fsopts);
} else if (S_ISREG(cur->type)) {
ffs_write_file(&din, cur->inode->ino, path, fsopts);
} else {
assert (! S_ISDIR(cur->type));
ffs_write_inode(&din, cur->inode->ino, fsopts);
}
}
/*
* pass 3: write out sub-directories
*/
if (debug & DEBUG_FS_POPULATE)
printf("ffs_populate_dir: PASS 3 dir %s\n", dir);
for (cur = root; cur != NULL; cur = cur->next) {
if (cur->child == NULL)
continue;
if ((size_t)snprintf(path, sizeof(path), "%s/%s", dir,
cur->name) >= sizeof(path))
errx(1, "Pathname too long.");
if (! ffs_populate_dir(path, cur->child, fsopts))
return (0);
}
if (debug & DEBUG_FS_POPULATE)
printf("ffs_populate_dir: DONE dir %s\n", dir);
/* cleanup */
if (dirbuf.buf != NULL)
free(dirbuf.buf);
return (1);
}
static void
ffs_write_file(union dinode *din, uint32_t ino, void *buf, fsinfo_t *fsopts)
{
int isfile, ffd;
char *fbuf, *p;
off_t bufleft, chunk, offset;
ssize_t nread;
struct inode in;
struct buf * bp;
ffs_opt_t *ffs_opts = fsopts->fs_specific;
struct vnode vp = { fsopts, NULL };
assert (din != NULL);
assert (buf != NULL);
assert (fsopts != NULL);
assert (ffs_opts != NULL);
isfile = S_ISREG(DIP(din, mode));
fbuf = NULL;
ffd = -1;
p = NULL;
in.i_fs = (struct fs *)fsopts->superblock;
in.i_devvp = &vp;
if (debug & DEBUG_FS_WRITE_FILE) {
printf(
"ffs_write_file: ino %u, din %p, isfile %d, %s, size %lld",
ino, din, isfile, inode_type(DIP(din, mode) & S_IFMT),
(long long)DIP(din, size));
if (isfile)
printf(", file '%s'\n", (char *)buf);
else
printf(", buffer %p\n", buf);
}
in.i_number = ino;
in.i_size = DIP(din, size);
if (ffs_opts->version == 1)
memcpy(&in.i_din.ffs1_din, &din->ffs1_din,
sizeof(in.i_din.ffs1_din));
else
memcpy(&in.i_din.ffs2_din, &din->ffs2_din,
sizeof(in.i_din.ffs2_din));
if (DIP(din, size) == 0)
goto write_inode_and_leave; /* mmm, cheating */
if (isfile) {
fbuf = emalloc(ffs_opts->bsize);
if ((ffd = open((char *)buf, O_RDONLY, 0444)) == -1) {
warn("Can't open `%s' for reading", (char *)buf);
goto leave_ffs_write_file;
}
} else {
p = buf;
}
chunk = 0;
for (bufleft = DIP(din, size); bufleft > 0; bufleft -= chunk) {
chunk = MIN(bufleft, ffs_opts->bsize);
if (!isfile)
;
else if ((nread = read(ffd, fbuf, chunk)) == -1)
err(EXIT_FAILURE, "Reading `%s', %lld bytes to go",
(char *)buf, (long long)bufleft);
else if (nread != chunk)
errx(EXIT_FAILURE, "Reading `%s', %lld bytes to go, "
"read %zd bytes, expected %ju bytes, does "
"metalog size= attribute mismatch source size?",
(char *)buf, (long long)bufleft, nread,
(uintmax_t)chunk);
else
p = fbuf;
offset = DIP(din, size) - bufleft;
if (debug & DEBUG_FS_WRITE_FILE_BLOCK)
printf(
"ffs_write_file: write %p offset %lld size %lld left %lld\n",
p, (long long)offset,
(long long)chunk, (long long)bufleft);
/*
* XXX if holey support is desired, do the check here
*
* XXX might need to write out last bit in fragroundup
* sized chunk. however, ffs_balloc() handles this for us
*/
errno = ffs_balloc(&in, offset, chunk, &bp);
bad_ffs_write_file:
if (errno != 0)
err(1,
"Writing inode %d (%s), bytes %lld + %lld",
ino,
isfile ? (char *)buf :
inode_type(DIP(din, mode) & S_IFMT),
(long long)offset, (long long)chunk);
memcpy(bp->b_data, p, chunk);
errno = bwrite(bp);
if (errno != 0)
goto bad_ffs_write_file;
if (!isfile)
p += chunk;
}
write_inode_and_leave:
ffs_write_inode(&in.i_din, in.i_number, fsopts);
leave_ffs_write_file:
if (fbuf)
free(fbuf);
if (ffd != -1)
close(ffd);
}
static void
ffs_dump_dirbuf(dirbuf_t *dbuf, const char *dir, int needswap)
{
doff_t i;
struct direct *de;
uint16_t reclen;
assert (dbuf != NULL);
assert (dir != NULL);
printf("ffs_dump_dirbuf: dir %s size %d cur %d\n",
dir, dbuf->size, dbuf->cur);
for (i = 0; i < dbuf->size; ) {
de = (struct direct *)(dbuf->buf + i);
reclen = ufs_rw16(de->d_reclen, needswap);
printf(
" inode %4d %7s offset %4d reclen %3d namlen %3d name %s\n",
ufs_rw32(de->d_fileno, needswap),
inode_type(DTTOIF(de->d_type)), i, reclen,
de->d_namlen, de->d_name);
i += reclen;
assert(reclen > 0);
}
}
static void
ffs_make_dirbuf(dirbuf_t *dbuf, const char *name, fsnode *node, int needswap)
{
struct direct de, *dp;
uint16_t llen, reclen;
u_char *newbuf;
assert (dbuf != NULL);
assert (name != NULL);
assert (node != NULL);
/* create direct entry */
(void)memset(&de, 0, sizeof(de));
de.d_fileno = ufs_rw32(node->inode->ino, needswap);
de.d_type = IFTODT(node->type);
de.d_namlen = (uint8_t)strlen(name);
strcpy(de.d_name, name);
reclen = UFS_DIRSIZ(0, &de, needswap);
de.d_reclen = ufs_rw16(reclen, needswap);
dp = (struct direct *)(dbuf->buf + dbuf->cur);
llen = 0;
if (dp != NULL)
llen = UFS_DIRSIZ(0, dp, needswap);
if (debug & DEBUG_FS_MAKE_DIRBUF)
printf(
"ffs_make_dirbuf: dbuf siz %d cur %d lastlen %d\n"
" ino %d type %d reclen %d namlen %d name %.30s\n",
dbuf->size, dbuf->cur, llen,
ufs_rw32(de.d_fileno, needswap), de.d_type, reclen,
de.d_namlen, de.d_name);
if (reclen + dbuf->cur + llen > roundup(dbuf->size, UFS_DIRBLKSIZ)) {
if (debug & DEBUG_FS_MAKE_DIRBUF)
printf("ffs_make_dirbuf: growing buf to %d\n",
dbuf->size + UFS_DIRBLKSIZ);
newbuf = erealloc(dbuf->buf, dbuf->size + UFS_DIRBLKSIZ);
dbuf->buf = newbuf;
dbuf->size += UFS_DIRBLKSIZ;
memset(dbuf->buf + dbuf->size - UFS_DIRBLKSIZ, 0, UFS_DIRBLKSIZ);
dbuf->cur = dbuf->size - UFS_DIRBLKSIZ;
} else if (dp) { /* shrink end of previous */
dp->d_reclen = ufs_rw16(llen,needswap);
dbuf->cur += llen;
}
dp = (struct direct *)(dbuf->buf + dbuf->cur);
memcpy(dp, &de, reclen);
dp->d_reclen = ufs_rw16(dbuf->size - dbuf->cur, needswap);
}
/*
* cribbed from sys/ufs/ffs/ffs_alloc.c
*/
static void
ffs_write_inode(union dinode *dp, uint32_t ino, const fsinfo_t *fsopts)
{
char *buf;
struct ufs1_dinode *dp1;
struct ufs2_dinode *dp2, *dip;
struct cg *cgp;
struct fs *fs;
int cg, cgino, i;
daddr_t d;
char sbbuf[FFS_MAXBSIZE];
uint32_t initediblk;
ffs_opt_t *ffs_opts = fsopts->fs_specific;
assert (dp != NULL);
assert (ino > 0);
assert (fsopts != NULL);
assert (ffs_opts != NULL);
fs = (struct fs *)fsopts->superblock;
cg = ino_to_cg(fs, ino);
cgino = ino % fs->fs_ipg;
if (debug & DEBUG_FS_WRITE_INODE)
printf("ffs_write_inode: din %p ino %u cg %d cgino %d\n",
dp, ino, cg, cgino);
ffs_rdfs(FFS_FSBTODB(fs, cgtod(fs, cg)), (int)fs->fs_cgsize, &sbbuf,
fsopts);
cgp = (struct cg *)sbbuf;
if (!cg_chkmagic(cgp, fsopts->needswap))
errx(1, "ffs_write_inode: cg %d: bad magic number", cg);
assert (isclr(cg_inosused(cgp, fsopts->needswap), cgino));
buf = emalloc(fs->fs_bsize);
dp1 = (struct ufs1_dinode *)buf;
dp2 = (struct ufs2_dinode *)buf;
if (fs->fs_cstotal.cs_nifree == 0)
errx(1, "ffs_write_inode: fs out of inodes for ino %u",
ino);
if (fs->fs_cs(fs, cg).cs_nifree == 0)
errx(1,
"ffs_write_inode: cg %d out of inodes for ino %u",
cg, ino);
setbit(cg_inosused(cgp, fsopts->needswap), cgino);
ufs_add32(cgp->cg_cs.cs_nifree, -1, fsopts->needswap);
fs->fs_cstotal.cs_nifree--;
fs->fs_cs(fs, cg).cs_nifree--;
if (S_ISDIR(DIP(dp, mode))) {
ufs_add32(cgp->cg_cs.cs_ndir, 1, fsopts->needswap);
fs->fs_cstotal.cs_ndir++;
fs->fs_cs(fs, cg).cs_ndir++;
}
/*
* Initialize inode blocks on the fly for UFS2.
*/
initediblk = ufs_rw32(cgp->cg_initediblk, fsopts->needswap);
if (ffs_opts->version == 2 &&
(uint32_t)(cgino + FFS_INOPB(fs)) > initediblk &&
initediblk < ufs_rw32(cgp->cg_niblk, fsopts->needswap)) {
memset(buf, 0, fs->fs_bsize);
dip = (struct ufs2_dinode *)buf;
srandom(time(NULL));
for (i = 0; i < FFS_INOPB(fs); i++) {
dip->di_gen = random() / 2 + 1;
dip++;
}
ffs_wtfs(FFS_FSBTODB(fs, ino_to_fsba(fs,
cg * fs->fs_ipg + initediblk)),
fs->fs_bsize, buf, fsopts);
initediblk += FFS_INOPB(fs);
cgp->cg_initediblk = ufs_rw32(initediblk, fsopts->needswap);
}
ffs_wtfs(FFS_FSBTODB(fs, cgtod(fs, cg)), (int)fs->fs_cgsize, &sbbuf,
fsopts);
/* now write inode */
d = FFS_FSBTODB(fs, ino_to_fsba(fs, ino));
ffs_rdfs(d, fs->fs_bsize, buf, fsopts);
if (fsopts->needswap) {
if (ffs_opts->version == 1)
ffs_dinode1_swap(&dp->ffs1_din,
&dp1[ino_to_fsbo(fs, ino)]);
else
ffs_dinode2_swap(&dp->ffs2_din,
&dp2[ino_to_fsbo(fs, ino)]);
} else {
if (ffs_opts->version == 1)
dp1[ino_to_fsbo(fs, ino)] = dp->ffs1_din;
else
dp2[ino_to_fsbo(fs, ino)] = dp->ffs2_din;
}
ffs_wtfs(d, fs->fs_bsize, buf, fsopts);
free(buf);
}
void
panic(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
vwarnx(fmt, ap);
va_end(ap);
exit(1);
}
Reference in New Issue View Git Blame Copy Permalink