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

969 lines
28 KiB
C
Raw Blame History

/* $NetBSD: ffs.c,v 1.15 2002/05/30 18:16:41 thorpej 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 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.
*
* @(#)ffs_alloc.c 8.19 (Berkeley) 7/13/95
*/
#include <sys/cdefs.h>
#if defined(__RCSID) && !defined(__lint)
__RCSID("$NetBSD: ffs.c,v 1.15 2002/05/30 18:16:41 thorpej Exp $");
#endif /* !__lint */
#include <sys/param.h>
#include <sys/mount.h>
#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 "makefs.h"
#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"
/*
* 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(struct dinode *, uint32_t, void *, fsinfo_t *);
static void ffs_write_inode(struct dinode *, uint32_t, const fsinfo_t *);
int sectorsize; /* XXX: for buf.c::getblk() */
/* publically visible functions */
int
ffs_parse_opts(const char *option, fsinfo_t *fsopts)
{
option_t ffs_options[] = {
{ "bsize", &fsopts->bsize, 1, INT_MAX,
"block size" },
{ "fsize", &fsopts->fsize, 1, INT_MAX,
"fragment size" },
{ "cpg", &fsopts->cpg, 1, INT_MAX,
"cylinders per group" },
{ "density", &fsopts->density, 1, INT_MAX,
"bytes per inode" },
{ "ntracks", &fsopts->ntracks, 1, INT_MAX,
"number of tracks" },
{ "nsectors", &fsopts->nsectors, 1, INT_MAX,
"number of sectors" },
{ "rpm", &fsopts->rpm, 1, INT_MAX,
"revolutions per minute" },
{ "minfree", &fsopts->minfree, 0, 99,
"minfree" },
{ "rotdelay", &fsopts->rotdelay, 0, INT_MAX,
"rotational delay" },
{ "maxbpg", &fsopts->maxbpg, 1, INT_MAX,
"max blocks per cylgroup" },
{ "nrpos", &fsopts->nrpos, 1, INT_MAX,
"number of rotational positions" },
{ "avgfilesize", &fsopts->avgfilesize, 1, INT_MAX,
"expected average file size" },
{ "avgfpdir", &fsopts->avgfpdir, 1, INT_MAX,
"expected # of files per directory" },
{ NULL }
};
char *var, *val;
int rv;
(void)&ffs_options;
assert(option != NULL);
assert(fsopts != NULL);
if (debug & DEBUG_FS_PARSE_OPTS)
printf("ffs_parse_opts: got `%s'\n", option);
if ((var = strdup(option)) == NULL)
err(1, "Allocating memory for copy of option string");
rv = 0;
if ((val = strchr(var, '=')) == NULL) {
warnx("Option `%s' doesn't contain a value", var);
goto leave_ffs_parse_opts;
}
*val++ = '\0';
if (strcmp(var, "optimization") == 0) {
if (strcmp(val, "time") == 0) {
fsopts->optimization = FS_OPTTIME;
} else if (strcmp(val, "space") == 0) {
fsopts->optimization = FS_OPTSPACE;
} else {
warnx("Invalid optimization `%s'", val);
goto leave_ffs_parse_opts;
}
rv = 1;
} else
rv = set_option(ffs_options, var, val);
leave_ffs_parse_opts:
if (var)
free(var);
return (rv);
}
void
ffs_makefs(const char *image, const char *dir, fsnode *root, fsinfo_t *fsopts)
{
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 = 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();
/* write out superblock; image is now complete */
((struct fs *)fsopts->superblock)->fs_fmod = 0;
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
assert(dir != NULL);
assert(root != NULL);
assert(fsopts != 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 (fsopts->fsize == -1)
fsopts->fsize = MAX(DFL_FRAGSIZE, fsopts->sectorsize);
if (fsopts->bsize == -1)
fsopts->bsize = MIN(DFL_BLKSIZE, 8 * fsopts->fsize);
if (fsopts->cpg == -1)
fsopts->cpg = DFL_CYLSPERGROUP;
else
fsopts->cpgflg = 1;
/* fsopts->density is set below */
if (fsopts->ntracks == -1)
fsopts->ntracks = DFL_NTRACKS;
if (fsopts->nsectors == -1)
fsopts->nsectors = DFL_NSECTORS;
if (fsopts->rpm == -1)
fsopts->rpm = DFL_RPM;
if (fsopts->minfree == -1)
fsopts->minfree = MINFREE;
if (fsopts->optimization == -1)
fsopts->optimization = DEFAULTOPT;
if (fsopts->maxcontig == -1)
fsopts->maxcontig =
MAX(1, MIN(MAXPHYS, MAXBSIZE) / fsopts->bsize);
if (fsopts->rotdelay == -1)
fsopts->rotdelay = DFL_ROTDELAY;
if (fsopts->maxbpg == -1)
fsopts->maxbpg = fsopts->bsize / sizeof(ufs_daddr_t);
if (fsopts->nrpos == -1)
fsopts->nrpos = DFL_NRPOS;
if (fsopts->avgfilesize == -1)
fsopts->avgfilesize = AVFILESIZ;
if (fsopts->avgfpdir == -1)
fsopts->avgfpdir = AFPDIR;
/* calculate size of tree */
ffs_size_dir(root, fsopts);
fsopts->inodes += 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;
#if notyet
/*
* estimate number of cylinder groups
*/
spc = fsopts->nsectors * fsopts->ntracks;
nspf = fsopts->fsize / fsopts->sectorsize;
fssize = fsopts->size / fsopts->sectorsize;
ncyl = fssize * nspf / spc;
if (fssize * nspf > ncyl * spc)
ncyl++;
ncg = ncyl / fsopts->cpg;
if (ncg == 0)
ncg = 1;
if (debug & DEBUG_FS_VALIDATE)
printf(
"ffs_validate: spc %d nspf %d fssize %d ncyl %d ncg %d\n",
spc, nspf, fssize, ncyl, ncg);
#endif /* notyet */
/* add space needed for superblocks */
fsopts->size += (SBOFF + SBSIZE) * ncg;
/* add space needed to store inodes, x3 for blockmaps, etc */
fsopts->size += ncg * DINODE_SIZE * 3 *
roundup(fsopts->inodes / ncg, fsopts->bsize / DINODE_SIZE);
/* add minfree */
if (fsopts->minfree > 0)
fsopts->size =
fsopts->size * (100 + fsopts->minfree) / 100;
/*
* XXX any other fs slop to add, such as csum's, 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, fsopts->bsize);
/* calculate density if necessary */
if (fsopts->density == -1)
fsopts->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);
}
sectorsize = fsopts->sectorsize; /* XXX - see earlier */
/* 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)
{
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",
f->bsize, f->fsize, f->cpg, f->density);
printf("\tntracks %d, nsectors %d, rpm %d, minfree %d\n",
f->ntracks, f->nsectors, f->rpm, f->minfree);
printf("\tmaxcontig %d, rotdelay %d, maxbpg %d, nrpos %d\n",
f->maxcontig, f->rotdelay, f->maxbpg, f->nrpos);
printf("\toptimization %s\n",
f->optimization == FS_OPTSPACE ? "space" : "time");
}
static int
ffs_create_image(const char *image, fsinfo_t *fsopts)
{
#if HAVE_STRUCT_STATFS_F_IOSIZE
struct statfs sfs;
#endif
struct fs *fs;
char *buf;
int i, bufsize;
off_t bufrem;
assert (image != NULL);
assert (fsopts != NULL);
/* create image */
if ((fsopts->fd = open(image, O_RDWR | O_CREAT | O_TRUNC, 0777))
== -1) {
warn("Can't open `%s' for writing", image);
return (-1);
}
/* zero image */
#if HAVE_STRUCT_STATFS_F_IOSIZE
if (fstatfs(fsopts->fd, &sfs) == -1) {
#endif
bufsize = 8192;
#if HAVE_STRUCT_STATFS_F_IOSIZE
warn("can't fstatfs `%s', using default %d byte chunk",
image, bufsize);
} else
bufsize = sfs.f_iosize;
#endif
bufrem = fsopts->size;
if (debug & DEBUG_FS_CREATE_IMAGE)
printf(
"zero-ing image `%s', %lld sectors, using %d byte chunks\n",
image, (long long)bufrem, bufsize);
if ((buf = calloc(1, bufsize)) == NULL) {
warn("Can't create buffer for sector");
return (-1);
}
while (bufrem > 0) {
i = write(fsopts->fd, buf, MIN(bufsize, bufrem));
if (i == -1) {
warn("zeroing image, %lld bytes to go",
(long long)bufrem);
return (-1);
}
bufrem -= i;
}
/* 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 = ((struct fs *)fsopts->superblock)->fs_time;
printf("mkfs returned %p; fs_time %s",
fsopts->superblock, ctime(&t));
printf("fs totals: nbfree %d, nffree %d, nifree %d, ndir %d\n",
fs->fs_cstotal.cs_nbfree, fs->fs_cstotal.cs_nffree,
fs->fs_cstotal.cs_nifree, fs->fs_cstotal.cs_ndir);
}
if (fs->fs_cstotal.cs_nifree < fsopts->inodes) {
warnx(
"Image file `%s' has %lld free inodes; %lld are required.",
image,
(long long)fs->fs_cstotal.cs_nifree,
(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;
/* node may be NULL (empty directory) */
assert(fsopts != 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 = 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, DIRBLKSIZ)) \
curdirsize = roundup(curdirsize, 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), fsopts->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) {
int slen;
slen = strlen(node->symlink) + 1;
if (slen >= 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 int
ffs_populate_dir(const char *dir, fsnode *root, fsinfo_t *fsopts)
{
fsnode *cur;
dirbuf_t dirbuf;
struct dinode din;
void *membuf;
char path[MAXPATHLEN + 1];
assert(dir != NULL);
assert(root != NULL);
assert(fsopts != 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 (snprintf(path, sizeof(path), "%s/%s", dir, cur->name)
>= sizeof(path))
errx(1, "Pathname too long.");
if (cur->child != NULL)
continue; /* child creates own inode */
/* build on-disk inode */
memset(&din, 0, sizeof(din));
din.di_mode = cur->inode->st.st_mode;
din.di_nlink = cur->inode->nlink;
din.di_size = cur->inode->st.st_size;
din.di_atime = cur->inode->st.st_atime;
din.di_mtime = cur->inode->st.st_mtime;
din.di_ctime = cur->inode->st.st_ctime;
#if HAVE_STRUCT_STAT_ST_MTIMENSEC
din.di_atimensec = cur->inode->st.st_atimensec;
din.di_mtimensec = cur->inode->st.st_mtimensec;
din.di_ctimensec = cur->inode->st.st_ctimensec;
#endif
#if HAVE_STRUCT_STAT_ST_FLAGS
din.di_flags = cur->inode->st.st_flags;
#endif
#if HAVE_STRUCT_STAT_ST_GEN
din.di_gen = cur->inode->st.st_gen;
#endif
din.di_uid = cur->inode->st.st_uid;
din.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 = dirbuf.buf;
din.di_size = dirbuf.size;
} else if (S_ISBLK(cur->type) || S_ISCHR(cur->type)) {
din.di_size = 0; /* a device */
din.di_rdev =
ufs_rw32(cur->inode->st.st_rdev, fsopts->needswap);
} else if (S_ISLNK(cur->type)) { /* symlink */
int slen;
slen = strlen(cur->symlink);
if (slen < MAXSYMLINKLEN) { /* short link */
memcpy(din.di_shortlink, cur->symlink, slen);
} else
membuf = cur->symlink;
din.di_size = slen;
}
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 (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(struct dinode *din, uint32_t ino, void *buf, fsinfo_t *fsopts)
{
int isfile, ffd;
char *fbuf, *p;
off_t bufleft, chunk, offset;
struct inode in;
struct buf * bp;
assert (din != NULL);
assert (buf != NULL);
assert (fsopts != NULL);
isfile = S_ISREG(din->di_mode);
fbuf = NULL;
ffd = -1;
if (debug & DEBUG_FS_WRITE_FILE) {
printf(
"ffs_write_file: ino %u, din %p, isfile %d, %s, size %lld",
ino, din, isfile, inode_type(din->di_mode & S_IFMT),
(long long)din->di_size);
if (isfile)
printf(", file '%s'\n", (char *)buf);
else
printf(", buffer %p\n", buf);
}
in.i_number = ino;
in.i_fs = (struct fs *)fsopts->superblock;
memcpy(&in.i_din.ffs_din, din, sizeof(in.i_din.ffs_din));
in.i_fd = fsopts->fd;
if (din->di_size == 0)
goto write_inode_and_leave; /* mmm, cheating */
if (isfile) {
if ((fbuf = malloc(fsopts->bsize)) == NULL)
err(1, "Allocating memory for write buffer");
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 = din->di_size; bufleft > 0; bufleft -= chunk) {
chunk = MIN(bufleft, fsopts->bsize);
if (isfile) {
if (read(ffd, fbuf, chunk) != chunk)
err(1, "Reading `%s', %lld bytes to go",
(char *)buf, (long long)bufleft);
p = fbuf;
}
offset = din->di_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(din->di_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;
brelse(bp);
if (!isfile)
p += chunk;
}
write_inode_and_leave:
ffs_write_inode(&in.i_din.ffs_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_ino, 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;
assert (dbuf != NULL);
assert (name != NULL);
assert (node != NULL);
/* create direct entry */
(void)memset(&de, 0, sizeof(de));
de.d_ino = 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 = DIRSIZ(0, &de, needswap);
de.d_reclen = ufs_rw16(reclen, needswap);
dp = (struct direct *)(dbuf->buf + dbuf->cur);
llen = 0;
if (dp != NULL)
llen = 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_ino, needswap), de.d_type, reclen,
de.d_namlen, de.d_name);
if (reclen + dbuf->cur + llen > roundup(dbuf->size, DIRBLKSIZ)) {
dbuf->size += DIRBLKSIZ; /* need another chunk */
if (debug & DEBUG_FS_MAKE_DIRBUF)
printf("ffs_make_dirbuf: growing buf to %d\n",
dbuf->size);
if ((dbuf->buf = realloc(dbuf->buf, dbuf->size)) == NULL)
err(1, "Allocating memory for directory buffer");
memset(dbuf->buf + dbuf->size - DIRBLKSIZ, 0, DIRBLKSIZ);
dbuf->cur = dbuf->size - DIRBLKSIZ;
} else { /* 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(struct dinode *ip, uint32_t ino, const fsinfo_t *fsopts)
{
struct dinode ibuf[MAXINOPB];
struct cg *cgp;
struct fs *fs;
int cg, cgino;
daddr_t d;
char sbbuf[MAXBSIZE];
assert (ip != NULL);
assert (ino > 0);
assert (fsopts != 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",
ip, ino, cg, cgino);
ffs_rdfs(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));
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(ip->di_mode)) {
ufs_add32(cgp->cg_cs.cs_ndir, 1, fsopts->needswap);
fs->fs_cstotal.cs_ndir++;
fs->fs_cs(fs, cg).cs_ndir++;
}
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, ibuf, fsopts);
if (fsopts->needswap)
ffs_dinode_swap(ip, &ibuf[ino_to_fsbo(fs, ino)]);
else
ibuf[ino_to_fsbo(fs, ino)] = *ip;
ffs_wtfs(d, fs->fs_bsize, ibuf, fsopts);
}
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