minix/usr.sbin/makefs/chfs/chfs_mkfs.c

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/*-
* Copyright (c) 2012 Department of Software Engineering,
* University of Szeged, Hungary
* Copyright (c) 2012 Tamas Toth <ttoth@inf.u-szeged.hu>
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by the Department of Software Engineering, University of Szeged, Hungary
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
#if HAVE_NBTOOL_CONFIG_H
#include "nbtool_config.h"
#endif
#include <sys/param.h>
#include <sys/stat.h>
#include <assert.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <zlib.h>
#include <util.h>
#if defined(__minix)
#include <unistd.h>
#endif
#include "makefs.h"
#include "chfs_makefs.h"
#include "media.h"
#include "ebh.h"
#include "chfs/chfs_mkfs.h"
static uint32_t img_ofs = 0;
static uint64_t version = 0;
static uint64_t max_serial = 0;
static int lebnumber = 0;
static const unsigned char ffbuf[16] = {
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
};
static void
buf_write(fsinfo_t *fsopts, const void *buf, size_t len)
{
ssize_t retval;
const char *charbuf = buf;
while (len > 0) {
retval = write(fsopts->fd, charbuf, len);
if (retval == -1) {
err(EXIT_FAILURE, "ERROR while writing");
}
len -= retval;
charbuf += retval;
img_ofs += retval;
}
}
void
padblock(fsinfo_t *fsopts)
{
chfs_opt_t *chfs_opts = fsopts->fs_specific;
while (img_ofs % chfs_opts->eraseblock) {
buf_write(fsopts, ffbuf, MIN(sizeof(ffbuf),
chfs_opts->eraseblock - (img_ofs % chfs_opts->eraseblock)));
}
}
static void
padword(fsinfo_t *fsopts)
{
if (img_ofs % 4) {
buf_write(fsopts, ffbuf, 4 - img_ofs % 4);
}
}
static void
pad_block_if_less_than(fsinfo_t *fsopts, int req)
{
chfs_opt_t *chfs_opts = fsopts->fs_specific;
if ((img_ofs % chfs_opts->eraseblock) + req >
(uint32_t)chfs_opts->eraseblock) {
padblock(fsopts);
write_eb_header(fsopts);
}
}
void
write_eb_header(fsinfo_t *fsopts)
{
chfs_opt_t *opts;
struct chfs_eb_hdr ebhdr;
char *buf;
opts = fsopts->fs_specific;
#define MINSIZE MAX(MAX(CHFS_EB_EC_HDR_SIZE, CHFS_EB_HDR_NOR_SIZE), \
CHFS_EB_HDR_NAND_SIZE)
if ((uint32_t)opts->pagesize < MINSIZE)
errx(EXIT_FAILURE, "pagesize cannot be less than %zu", MINSIZE);
buf = emalloc(opts->pagesize);
memset(buf, 0xFF, opts->pagesize);
ebhdr.ec_hdr.magic = htole32(CHFS_MAGIC_BITMASK);
ebhdr.ec_hdr.erase_cnt = htole32(1);
ebhdr.ec_hdr.crc_ec = htole32(crc32(0,
(uint8_t *)&ebhdr.ec_hdr + 8, 4));
memcpy(buf, &ebhdr.ec_hdr, CHFS_EB_EC_HDR_SIZE);
buf_write(fsopts, buf, opts->pagesize);
memset(buf, 0xFF, opts->pagesize);
if (opts->mediatype == TYPE_NAND) {
ebhdr.u.nand_hdr.lid = htole32(lebnumber++);
ebhdr.u.nand_hdr.serial = htole64(++(max_serial));
ebhdr.u.nand_hdr.crc = htole32(crc32(0,
(uint8_t *)&ebhdr.u.nand_hdr + 4,
CHFS_EB_HDR_NAND_SIZE - 4));
memcpy(buf, &ebhdr.u.nand_hdr, CHFS_EB_HDR_NAND_SIZE);
} else {
ebhdr.u.nor_hdr.lid = htole32(lebnumber++);
ebhdr.u.nor_hdr.crc = htole32(crc32(0,
(uint8_t *)&ebhdr.u.nor_hdr + 4,
CHFS_EB_HDR_NOR_SIZE - 4));
memcpy(buf, &ebhdr.u.nor_hdr, CHFS_EB_HDR_NOR_SIZE);
}
buf_write(fsopts, buf, opts->pagesize);
free(buf);
}
void
write_vnode(fsinfo_t *fsopts, fsnode *node)
{
struct chfs_flash_vnode fvnode;
memset(&fvnode, 0, sizeof(fvnode));
fvnode.magic = htole16(CHFS_FS_MAGIC_BITMASK);
fvnode.type = htole16(CHFS_NODETYPE_VNODE);
fvnode.length = htole32(CHFS_PAD(sizeof(fvnode)));
fvnode.hdr_crc = htole32(crc32(0, (uint8_t *)&fvnode,
CHFS_NODE_HDR_SIZE - 4));
fvnode.vno = htole64(node->inode->ino);
fvnode.version = htole64(version++);
fvnode.mode = htole32(node->inode->st.st_mode);
fvnode.dn_size = htole32(node->inode->st.st_size);
fvnode.atime = htole32(node->inode->st.st_atime);
fvnode.ctime = htole32(node->inode->st.st_ctime);
fvnode.mtime = htole32(node->inode->st.st_mtime);
fvnode.gid = htole32(node->inode->st.st_uid);
fvnode.uid = htole32(node->inode->st.st_gid);
fvnode.node_crc = htole32(crc32(0, (uint8_t *)&fvnode,
sizeof(fvnode) - 4));
pad_block_if_less_than(fsopts, sizeof(fvnode));
buf_write(fsopts, &fvnode, sizeof(fvnode));
padword(fsopts);
}
void
write_dirent(fsinfo_t *fsopts, fsnode *node)
{
struct chfs_flash_dirent_node fdirent;
char *name;
name = emalloc(strlen(node->name));
memcpy(name, node->name, strlen(node->name));
memset(&fdirent, 0, sizeof(fdirent));
fdirent.magic = htole16(CHFS_FS_MAGIC_BITMASK);
fdirent.type = htole16(CHFS_NODETYPE_DIRENT);
fdirent.length = htole32(CHFS_PAD(sizeof(fdirent) + strlen(name)));
fdirent.hdr_crc = htole32(crc32(0, (uint8_t *)&fdirent,
CHFS_NODE_HDR_SIZE - 4));
fdirent.vno = htole64(node->inode->ino);
if (node->parent != NULL) {
fdirent.pvno = htole64(node->parent->inode->ino);
} else {
fdirent.pvno = htole64(node->inode->ino);
}
fdirent.version = htole64(version++);
fdirent.mctime = 0;
fdirent.nsize = htole32(strlen(name));
fdirent.dtype = htole32(IFTOCHT(node->type & S_IFMT));
fdirent.name_crc = htole32(crc32(0, (uint8_t *)name, fdirent.nsize));
fdirent.node_crc = htole32(crc32(0, (uint8_t *)&fdirent,
sizeof(fdirent) - 4));
pad_block_if_less_than(fsopts, sizeof(fdirent) + fdirent.nsize);
buf_write(fsopts, &fdirent, sizeof(fdirent));
buf_write(fsopts, name, fdirent.nsize);
padword(fsopts);
}
void
write_file(fsinfo_t *fsopts, fsnode *node, const char *dir)
{
int fd;
ssize_t len;
char *name = node->name;
chfs_opt_t *opts;
unsigned char *buf;
uint32_t fileofs = 0;
opts = fsopts->fs_specific;
buf = emalloc(opts->pagesize);
if (node->type == S_IFREG || node->type == S_IFSOCK) {
char *longname;
if (asprintf(&longname, "%s/%s", dir, name) == 1)
goto out;
fd = open(longname, O_RDONLY, 0444);
if (fd == -1)
err(EXIT_FAILURE, "Cannot open `%s'", longname);
while ((len = read(fd, buf, opts->pagesize))) {
if (len < 0) {
warn("ERROR while reading %s", longname);
free(longname);
free(buf);
close(fd);
return;
}
write_data(fsopts, node, buf, len, fileofs);
fileofs += len;
}
free(longname);
close(fd);
} else if (node->type == S_IFLNK) {
len = strlen(node->symlink);
memcpy(buf, node->symlink, len);
write_data(fsopts, node, buf, len, 0);
} else if (node->type == S_IFCHR || node->type == S_IFBLK ||
node->type == S_IFIFO) {
len = sizeof(dev_t);
memcpy(buf, &(node->inode->st.st_rdev), len);
write_data(fsopts, node, buf, len, 0);
}
free(buf);
return;
out:
err(EXIT_FAILURE, "Memory allocation failed");
}
void
write_data(fsinfo_t *fsopts, fsnode *node, unsigned char *buf, size_t len,
uint32_t ofs)
{
struct chfs_flash_data_node fdata;
memset(&fdata, 0, sizeof(fdata));
if (len == 0) {
return;
}
pad_block_if_less_than(fsopts, sizeof(fdata) + len);
fdata.magic = htole16(CHFS_FS_MAGIC_BITMASK);
fdata.type = htole16(CHFS_NODETYPE_DATA);
fdata.length = htole32(CHFS_PAD(sizeof(fdata) + len));
fdata.hdr_crc = htole32(crc32(0, (uint8_t *)&fdata,
CHFS_NODE_HDR_SIZE - 4));
fdata.vno = htole64(node->inode->ino);
fdata.data_length = htole32(len);
fdata.offset = htole32(ofs);
fdata.data_crc = htole32(crc32(0, (uint8_t *)buf, len));
fdata.node_crc = htole32(crc32(0,
(uint8_t *)&fdata, sizeof(fdata) - 4));
buf_write(fsopts, &fdata, sizeof(fdata));
buf_write(fsopts, buf, len);
padword(fsopts);
}