File: [local] / src / usr.sbin / makefs / ffs.c (download)
Revision 1.39, Tue Jan 9 03:16:00 2024 UTC (4 months, 3 weeks ago) by guenther
Branch: MAIN
CVS Tags: OPENBSD_7_5_BASE, OPENBSD_7_5, HEAD
Changes since 1.38: +6 -6 lines
Delete support for FFS filesystems before the in-inode symlink
optimization. As observed by ali_farzanrad(at)riseup.net, support
for these was broken in the 5.5 release in early 2014 by the time_t
changes. No one noticed before now, so clearly this isn't something
we need to continue to support; rejecting in ffs_validate() is an
improvement.
Also: simplify DIRSIZ(), drop OLDDIRFMT and NEWDIRFMT, tests of
fs_maxsymlinklen against zero, #ifdef tests of FS_44INODEFMT, and
remove support for newfs -O0, last used in 2016.
ok miod@
|
/* $OpenBSD: ffs.c,v 1.39 2024/01/09 03:16:00 guenther Exp $ */
/* $NetBSD: ffs.c,v 1.66 2015/12/21 00:58:08 christos 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
*/
#include <sys/param.h> /* roundup DEV_BSIZE */
#include <sys/types.h>
#include <sys/disklabel.h>
#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdint.h>
#include <limits.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <ufs/ufs/dinode.h>
#include <ufs/ufs/dir.h>
#include <ufs/ffs/fs.h>
#include "ffs/ufs_inode.h"
#include "ffs/ffs_extern.h"
#include "makefs.h"
#include "ffs.h"
#include "ffs/newfs_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 2048 /* fragment size */
#define DFL_BLKSIZE 16384 /* block size */
#define DFL_SECSIZE 512 /* sector size */
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_make_dirbuf(dirbuf_t *, const char *, fsnode *);
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 *);
struct disklabel *ffs_makerdroot(const fsinfo_t *);
/* publicly visible functions */
void
ffs_prep_opts(fsinfo_t *fsopts)
{
ffs_opt_t *ffs_opts = ecalloc(1, sizeof(*ffs_opts));
const option_t ffs_options[] = {
{ "avgfilesize", &ffs_opts->avgfilesize, OPT_INT32, 1, INT_MAX },
{ "avgfpdir", &ffs_opts->avgfpdir, OPT_INT32, 1, INT_MAX },
{ "bsize", &ffs_opts->bsize, OPT_INT32, 1, INT_MAX },
{ "density", &ffs_opts->density, OPT_INT32, 1, INT_MAX },
{ "disklabel", NULL, OPT_STRBUF, 0, 0 },
{ "extent", &ffs_opts->maxbsize, OPT_INT32, 1, INT_MAX },
{ "fsize", &ffs_opts->fsize, OPT_INT32, 1, INT_MAX },
{ "label", ffs_opts->label, OPT_STRARRAY, 1, MAXVOLLEN },
{ "maxbpcg", &ffs_opts->maxblkspercg, OPT_INT32, 1, INT_MAX },
{ "maxbpg", &ffs_opts->maxbpg, OPT_INT32, 1, INT_MAX },
{ "minfree", &ffs_opts->minfree, OPT_INT32, 0, 99 },
{ "optimization", NULL, OPT_STRBUF, 0, 0 },
{ "rdroot", &ffs_opts->rdroot, OPT_INT32, 0, 1 },
{ "version", &ffs_opts->version, OPT_INT32, 1, 2 },
{ .name = NULL }
};
ffs_opts->bsize = -1;
ffs_opts->fsize = -1;
ffs_opts->density = -1;
ffs_opts->minfree = MINFREE;
ffs_opts->optimization = FS_OPTSPACE;
ffs_opts->maxbpg = -1;
ffs_opts->avgfilesize = AVFILESIZ;
ffs_opts->avgfpdir = AFPDIR;
ffs_opts->version = 1;
ffs_opts->rdroot = 0;
ffs_opts->lp = NULL;
ffs_opts->pp = NULL;
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);
rv = set_option(ffs_options, option, buf, sizeof(buf));
if (rv == -1)
return 0;
if (ffs_options[rv].name == NULL)
abort();
if (strcmp(ffs_options[rv].name, "disklabel") == 0) {
struct disklabel *dp;
dp = getdiskbyname(buf);
if (dp == NULL)
errx(1, "unknown disk type: %s", buf);
ffs_opts->lp = emalloc(sizeof(struct disklabel));
*ffs_opts->lp = *dp;
} else if (strcmp(ffs_options[rv].name, "optimization") == 0) {
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;
}
}
return 1;
}
struct disklabel *
ffs_makerdroot(const fsinfo_t *fsopts)
{
const ffs_opt_t *ffs_opts = fsopts->fs_specific;
struct disklabel *lp;
struct partition *pp;
uint32_t rdsize, poffset;
const uint32_t sectorsize = fsopts->sectorsize;
const uint32_t fsize = ffs_opts->fsize;
const uint32_t bsize = ffs_opts->bsize;
rdsize = (fsopts->size + sectorsize - 1) / sectorsize;
poffset = (fsopts->offset + sectorsize - 1) / sectorsize;
lp = ecalloc(1, sizeof(struct disklabel));
lp->d_version = 1;
lp->d_type = DTYPE_RDROOT;
strlcpy(lp->d_typename, "rdroot", sizeof(lp->d_typename));
lp->d_npartitions = RAW_PART + 1;
lp->d_secsize = sectorsize;
lp->d_ntracks = lp->d_ncylinders = 1;
lp->d_secpercyl = rdsize;
DL_SETDSIZE(lp, rdsize);
pp = &lp->d_partitions[0]; /* a.k.a. 'a' */
pp->p_fstype = FS_BSDFFS;
pp->p_fragblock = DISKLABELV1_FFS_FRAGBLOCK(fsize, bsize / fsize);
DL_SETPOFFSET(pp, poffset);
DL_SETPSIZE(pp, rdsize - poffset);
pp = &lp->d_partitions[RAW_PART]; /* a.k.a. 'c' */
DL_SETPOFFSET(pp, 0);
DL_SETPSIZE(pp, DL_GETDSIZE(lp));
return lp;
}
void
ffs_makefs(const char *image, const char *dir, fsnode *root, fsinfo_t *fsopts)
{
struct fs *superblock;
ffs_opt_t *ffs_opts = fsopts->fs_specific;
assert(image != NULL);
assert(dir != NULL);
assert(root != NULL);
assert(fsopts != NULL);
/* validate tree and options */
ffs_validate(dir, root, fsopts);
printf("Calculated size of `%s': %lld bytes, %lld inodes\n",
image, (long long)fsopts->size, (long long)fsopts->inodes);
/* create image */
if (ffs_create_image(image, fsopts) == -1)
errx(1, "Image file `%s' not created.", image);
fsopts->curinode = ROOTINO;
/* populate image */
printf("Populating `%s'\n", image);
if (! ffs_populate_dir(dir, root, fsopts))
errx(1, "Image file `%s' not populated.", image);
bcleanup();
/* update various superblock parameters */
superblock = fsopts->superblock;
superblock->fs_fmod = 0;
superblock->fs_ffs1_cstotal.cs_ndir = superblock->fs_cstotal.cs_ndir;
superblock->fs_ffs1_cstotal.cs_nbfree = superblock->fs_cstotal.cs_nbfree;
superblock->fs_ffs1_cstotal.cs_nifree = superblock->fs_cstotal.cs_nifree;
superblock->fs_ffs1_cstotal.cs_nffree = superblock->fs_cstotal.cs_nffree;
/* write out superblock; image is now complete */
ffs_write_superblock(fsopts->superblock, fsopts);
if (ffs_opts->rdroot == 1) {
ffs_opts->lp = ffs_makerdroot(fsopts);
ffs_opts->pp = &ffs_opts->lp->d_partitions[0];
}
if (ffs_opts->lp != NULL) {
struct disklabel *lp = ffs_opts->lp;
uint16_t *p, *end, sum = 0;
ssize_t n;
uint32_t bpg;
bpg = superblock->fs_fpg / superblock->fs_frag;
while (bpg > UINT16_MAX)
bpg >>= 1;
ffs_opts->pp->p_cpg = bpg;
lp->d_magic = DISKMAGIC;
lp->d_magic2 = DISKMAGIC;
arc4random_buf(lp->d_uid, sizeof(lp->d_uid));
lp->d_checksum = 0;
p = (uint16_t *)lp;
end = (uint16_t *)&lp->d_partitions[lp->d_npartitions];
while (p < end)
sum ^= *p++;
lp->d_checksum = sum;
n = pwrite(fsopts->fd, lp, sizeof(struct disklabel),
fsopts->offset + LABELSECTOR * DEV_BSIZE + LABELOFFSET);
if (n == -1)
err(1, "failed to write disklabel");
else if (n < sizeof(struct disklabel))
errx(1, "failed to write disklabel: short write");
}
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)
{
ffs_opt_t *ffs_opts = fsopts->fs_specific;
struct disklabel *lp = ffs_opts->lp;
struct partition *pp = NULL;
int32_t ncg = 1;
int i;
assert(dir != NULL);
assert(root != NULL);
assert(fsopts != NULL);
assert(ffs_opts != NULL);
if (lp != NULL && ffs_opts->rdroot == 1)
errx(1, "rdroot and disklabel are mutually exclusive");
if (lp != NULL) {
for (i = 0; i < lp->d_npartitions; i++) {
pp = &lp->d_partitions[i];
if (pp->p_fstype == FS_BSDFFS &&
pp->p_offset * lp->d_secsize == fsopts->offset) {
break;
}
}
if (i == lp->d_npartitions)
errx(1, "no matching partition found in the disklabel");
ffs_opts->pp = pp;
if (pp->p_fragblock == 0)
errx(1, "fragment size missing in disktab");
if (fsopts->freeblocks != 0 || fsopts->freeblockpc != 0 ||
fsopts->freefiles != 0 || fsopts->freefilepc != 0 ||
fsopts->minsize != 0 || fsopts->maxsize != 0 ||
fsopts->sectorsize != -1 || fsopts->size != 0)
errx(1, "-bfMmSs and disklabel are mutually exclusive");
if (ffs_opts->fsize != -1 || ffs_opts->bsize != -1)
errx(1, "b/fsize and disklabel are mutually exclusive");
fsopts->sectorsize = lp->d_secsize;
fsopts->minsize = fsopts->maxsize =
DL_GETPSIZE(pp) * lp->d_secsize;
ffs_opts->fsize = DISKLABELV1_FFS_FSIZE(pp->p_fragblock);
ffs_opts->bsize = DISKLABELV1_FFS_BSIZE(pp->p_fragblock);
} else if (ffs_opts->rdroot == 1) {
if (fsopts->freeblocks != 0 || fsopts->freeblockpc != 0 ||
fsopts->freefiles != 0 || fsopts->freefilepc != 0 ||
fsopts->offset != 0 || fsopts->sectorsize != -1 ||
fsopts->minsize != fsopts->maxsize)
errx(1, "rdroot and -bfMmOS are mutually exclusive");
if (fsopts->minsize == 0 || fsopts->maxsize == 0)
errx(1, "rdroot requires -s");
if (ffs_opts->minfree != 0)
errx(1, "rdroot requires minfree=0");
if (ffs_opts->fsize == -1 || ffs_opts->bsize == -1 ||
ffs_opts->density == -1)
errx(1, "rdroot requires bsize, fsize and density");
fsopts->sectorsize = DEV_BSIZE;
}
/* set FFS defaults */
if (fsopts->sectorsize == -1)
fsopts->sectorsize = DFL_SECSIZE;
if (ffs_opts->fsize == -1)
ffs_opts->fsize = MAXIMUM(DFL_FRAGSIZE, fsopts->sectorsize);
if (ffs_opts->bsize == -1)
ffs_opts->bsize = MINIMUM(DFL_BLKSIZE, 8 * ffs_opts->fsize);
/* fsopts->density is set below */
/* XXX ondisk32 */
if (ffs_opts->maxbpg == -1)
ffs_opts->maxbpg = ffs_opts->bsize / sizeof(int32_t);
/* calculate size of tree */
ffs_size_dir(root, fsopts);
fsopts->inodes += ROOTINO; /* include first two 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 * sizeof(struct ufs1_dinode) *
roundup(fsopts->inodes / ncg,
ffs_opts->bsize / sizeof(struct ufs1_dinode));
else
fsopts->size += ncg * sizeof(struct ufs2_dinode) *
roundup(fsopts->inodes / ncg,
ffs_opts->bsize / sizeof(struct ufs2_dinode));
/* 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;
/* 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 int
ffs_create_image(const char *image, fsinfo_t *fsopts)
{
struct fs *fs;
char *buf;
int i, bufsize;
off_t bufrem;
time_t tstamp;
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 */
bufsize = 8192;
bufrem = fsopts->size;
if (fsopts->offset != 0)
if (lseek(fsopts->fd, fsopts->offset, SEEK_SET) == -1) {
warn("can't seek");
return -1;
}
if (bufrem > 0)
buf = ecalloc(1, bufsize);
while (bufrem > 0) {
i = write(fsopts->fd, buf, MINIMUM(bufsize, bufrem));
if (i == -1) {
warn("zeroing image, %lld bytes to go",
(long long)bufrem);
free(buf);
return (-1);
}
bufrem -= i;
}
free(buf);
/* make the file system */
if (Tflag) {
tstamp = stampts;
srandom_deterministic(stampts);
} else
tstamp = start_time.tv_sec;
fs = ffs_mkfs(image, fsopts, tstamp);
fsopts->superblock = (void *)fs;
if ((off_t)(fs->fs_cstotal.cs_nifree + ROOTINO) < fsopts->inodes) {
warnx(
"Image file `%s' has %lld free inodes; %lld are required.",
image,
(long long)(fs->fs_cstotal.cs_nifree + 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);
#define ADDDIRENT(e) do { \
tmpdir.d_namlen = strlen((e)); \
this = DIRSIZ(&tmpdir); \
if (this + curdirsize > roundup(curdirsize, DIRBLKSIZ)) \
curdirsize = roundup(curdirsize, DIRBLKSIZ); \
curdirsize += this; \
} 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;
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 ?
MAXSYMLINKLEN_UFS1 :
MAXSYMLINKLEN_UFS2))
ADDSIZE(slen);
}
}
if (node->type == S_IFDIR)
ffs_size_dir(node->child, fsopts);
}
ADDSIZE(curdirsize);
}
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_flags = cur->inode->st.st_flags;
dinp->di_gen = cur->inode->st.st_gen;
dinp->di_uid = cur->inode->st.st_uid;
dinp->di_gid = cur->inode->st.st_gid;
dinp->di_atime = cur->inode->st.st_atime;
dinp->di_mtime = cur->inode->st.st_mtime;
dinp->di_ctime = cur->inode->st.st_ctime;
dinp->di_atimensec = cur->inode->st.st_atim.tv_nsec;
dinp->di_mtimensec = cur->inode->st.st_mtim.tv_nsec;
dinp->di_ctimensec = cur->inode->st.st_ctim.tv_nsec;
/* 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 = cur->inode->st.st_rdev;
} else if (S_ISLNK(cur->type)) { /* symlink */
slen = strlen(cur->symlink);
if (slen < MAXSYMLINKLEN_UFS1) { /* 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_flags = cur->inode->st.st_flags;
dinp->di_gen = cur->inode->st.st_gen;
dinp->di_uid = cur->inode->st.st_uid;
dinp->di_gid = cur->inode->st.st_gid;
dinp->di_atime = cur->inode->st.st_atime;
dinp->di_mtime = cur->inode->st.st_mtime;
dinp->di_ctime = cur->inode->st.st_ctime;
dinp->di_atimensec = cur->inode->st.st_atim.tv_nsec;
dinp->di_mtimensec = cur->inode->st.st_mtim.tv_nsec;
dinp->di_ctimensec = cur->inode->st.st_ctim.tv_nsec;
/* 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 = cur->inode->st.st_rdev;
} else if (S_ISLNK(cur->type)) { /* symlink */
slen = strlen(cur->symlink);
if (slen < MAXSYMLINKLEN_UFS2) { /* 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[PATH_MAX + 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));
/*
* 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);
if (cur == root) { /* we're at "."; add ".." */
ffs_make_dirbuf(&dirbuf, "..",
cur->parent == NULL ? cur : cur->parent->first);
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? :-)
*/
}
/*
* pass 2: write out dirbuf, then non-directories at this level
*/
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 (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
*/
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);
}
/* cleanup */
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 mkfsbuf * bp;
ffs_opt_t *ffs_opts = fsopts->fs_specific;
struct mkfsvnode 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;
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)) == -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 = MINIMUM(bufleft, ffs_opts->bsize);
if (!isfile)
;
else if ((nread = read(ffd, fbuf, chunk)) == -1)
err(1, "Reading `%s', %lld bytes to go", (char *)buf,
(long long)bufleft);
else if (nread != chunk)
errx(1, "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;
/*
* 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:
free(fbuf);
if (ffd != -1)
close(ffd);
}
static void
ffs_make_dirbuf(dirbuf_t *dbuf, const char *name, fsnode *node)
{
struct direct de, *dp;
uint16_t llen;
u_char *newbuf;
assert (dbuf != NULL);
assert (name != NULL);
assert (node != NULL);
/* create direct entry */
(void)memset(&de, 0, sizeof(de));
de.d_ino = node->inode->ino;
de.d_type = IFTODT(node->type);
de.d_namlen = (uint8_t)strlen(name);
strlcpy(de.d_name, name, sizeof de.d_name);
de.d_reclen = DIRSIZ(&de);
dp = (struct direct *)(dbuf->buf + dbuf->cur);
llen = 0;
if (dp != NULL)
llen = DIRSIZ(dp);
if (de.d_reclen + dbuf->cur + llen > roundup(dbuf->size, DIRBLKSIZ)) {
newbuf = erealloc(dbuf->buf, dbuf->size + DIRBLKSIZ);
dbuf->buf = newbuf;
dbuf->size += DIRBLKSIZ;
memset(dbuf->buf + dbuf->size - DIRBLKSIZ, 0, DIRBLKSIZ);
dbuf->cur = dbuf->size - DIRBLKSIZ;
} else if (dp) { /* shrink end of previous */
dp->d_reclen = llen;
dbuf->cur += llen;
}
dp = (struct direct *)(dbuf->buf + dbuf->cur);
memcpy(dp, &de, de.d_reclen);
dp->d_reclen = dbuf->size - dbuf->cur;
}
/*
* 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;
ffs_rdfs(fsbtodb(fs, cgtod(fs, cg)), (int)fs->fs_cgsize, &sbbuf,
fsopts);
cgp = (struct cg *)sbbuf;
if (!cg_chkmagic(cgp))
errx(1, "ffs_write_inode: cg %d: bad magic number", cg);
assert (isclr(cg_inosused(cgp), 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), cgino);
cgp->cg_cs.cs_nifree -= 1;
fs->fs_cstotal.cs_nifree--;
fs->fs_cs(fs, cg).cs_nifree--;
if (S_ISDIR(DIP(dp, mode))) {
cgp->cg_cs.cs_ndir += 1;
fs->fs_cstotal.cs_ndir++;
fs->fs_cs(fs, cg).cs_ndir++;
}
/*
* Initialize inode blocks on the fly for UFS2.
*/
initediblk = cgp->cg_initediblk;
if (ffs_opts->version == 2 &&
(uint32_t)(cgino + INOPB(fs)) > initediblk &&
initediblk < cgp->cg_ffs2_niblk) {
memset(buf, 0, fs->fs_bsize);
dip = (struct ufs2_dinode *)buf;
for (i = 0; i < INOPB(fs); i++) {
dip->di_gen = random() / 2 + 1;
dip++;
}
ffs_wtfs(fsbtodb(fs, ino_to_fsba(fs,
cg * fs->fs_ipg + initediblk)),
fs->fs_bsize, buf, fsopts);
initediblk += INOPB(fs);
cgp->cg_initediblk = initediblk;
}
ffs_wtfs(fsbtodb(fs, cgtod(fs, cg)), (int)fs->fs_cgsize, &sbbuf,
fsopts);
/* now write inode */
d = fsbtodb(fs, ino_to_fsba(fs, ino));
ffs_rdfs(d, fs->fs_bsize, buf, fsopts);
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);
}
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