+++ /dev/null
-/*
- * Build a JFFS image in a file, from a given directory tree.
- *
- * By default, builds an image that is of the same endianness as the
- * host.
- * The -a option can be used when building for a target system which
- * has a different endianness than the host.
- */
-
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <dirent.h>
-#include <unistd.h>
-#include <linux/types.h>
-#include <stdint.h>
-#include <mtd_swab.h>
-#include <ctype.h>
-
-
-#define BLOCK_SIZE 1024
-#define JFFS_MAGIC 0x34383931 /* "1984" */
-#define JFFS_MAX_NAME_LEN 256
-#define JFFS_MIN_INO 1
-#define JFFS_TRACE_INDENT 4
-#define JFFS_ALIGN_SIZE 4
-static int MAX_CHUNK_SIZE = 32768;
-
-/* How many padding bytes should be inserted between two chunks of data
- on the flash? */
-#define JFFS_GET_PAD_BYTES(size) ((JFFS_ALIGN_SIZE \
- - ((uint32_t)(size) % JFFS_ALIGN_SIZE)) \
- % JFFS_ALIGN_SIZE)
-
-
-struct jffs_raw_inode
-{
- uint32_t magic; /* A constant magic number. */
- uint32_t ino; /* Inode number. */
- uint32_t pino; /* Parent's inode number. */
- uint32_t version; /* Version number. */
- uint32_t mode; /* file_type, mode */
- uint16_t uid;
- uint16_t gid;
- uint32_t atime;
- uint32_t mtime;
- uint32_t ctime;
- uint32_t offset; /* Where to begin to write. */
- uint32_t dsize; /* Size of the file data. */
- uint32_t rsize; /* How much are going to be replaced? */
- uint8_t nsize; /* Name length. */
- uint8_t nlink; /* Number of links. */
- uint8_t spare : 6; /* For future use. */
- uint8_t rename : 1; /* Is this a special rename? */
- uint8_t deleted : 1; /* Has this file been deleted? */
- uint8_t accurate; /* The inode is obsolete if accurate == 0. */
- uint32_t dchksum; /* Checksum for the data. */
- uint16_t nchksum; /* Checksum for the name. */
- uint16_t chksum; /* Checksum for the raw_inode. */
-};
-
-
-struct jffs_file
-{
- struct jffs_raw_inode inode;
- char *name;
- unsigned char *data;
-};
-
-
-char *root_directory_name = NULL;
-int fs_pos = 0;
-int verbose = 0;
-
-#define ENDIAN_HOST 0
-#define ENDIAN_BIG 1
-#define ENDIAN_LITTLE 2
-int endian = ENDIAN_HOST;
-
-static uint32_t jffs_checksum(void *data, int size);
-void jffs_print_trace(const char *path, int depth);
-int make_root_dir(FILE *fs, int first_ino, const char *root_dir_path,
- int depth);
-void write_file(struct jffs_file *f, FILE *fs, struct stat st);
-void read_data(struct jffs_file *f, const char *path, int offset);
-int mkfs(FILE *fs, const char *path, int ino, int parent, int depth);
-
-
- static uint32_t
-jffs_checksum(void *data, int size)
-{
- uint32_t sum = 0;
- uint8_t *ptr = (uint8_t *)data;
-
- while (size-- > 0)
- {
- sum += *ptr++;
- }
-
- return sum;
-}
-
-
- void
-jffs_print_trace(const char *path, int depth)
-{
- int path_len = strlen(path);
- int out_pos = depth * JFFS_TRACE_INDENT;
- int pos = path_len - 1;
- char *out = (char *)alloca(depth * JFFS_TRACE_INDENT + path_len + 1);
-
- if (verbose >= 2)
- {
- fprintf(stderr, "jffs_print_trace(): path: \"%s\"\n", path);
- }
-
- if (!out) {
- fprintf(stderr, "jffs_print_trace(): Allocation failed.\n");
- fprintf(stderr, " path: \"%s\"\n", path);
- fprintf(stderr, "depth: %d\n", depth);
- exit(1);
- }
-
- memset(out, ' ', depth * JFFS_TRACE_INDENT);
-
- if (path[pos] == '/')
- {
- pos--;
- }
- while (path[pos] && (path[pos] != '/'))
- {
- pos--;
- }
- for (pos++; path[pos] && (path[pos] != '/'); pos++)
- {
- out[out_pos++] = path[pos];
- }
- out[out_pos] = '\0';
- fprintf(stderr, "%s\n", out);
-}
-
-
-/* Print the contents of a raw inode. */
- void
-jffs_print_raw_inode(struct jffs_raw_inode *raw_inode)
-{
- fprintf(stderr, "jffs_raw_inode: inode number: %u\n", raw_inode->ino);
- fprintf(stderr, "{\n");
- fprintf(stderr, " 0x%08x, /* magic */\n", raw_inode->magic);
- fprintf(stderr, " 0x%08x, /* ino */\n", raw_inode->ino);
- fprintf(stderr, " 0x%08x, /* pino */\n", raw_inode->pino);
- fprintf(stderr, " 0x%08x, /* version */\n", raw_inode->version);
- fprintf(stderr, " 0x%08x, /* mode */\n", raw_inode->mode);
- fprintf(stderr, " 0x%04x, /* uid */\n", raw_inode->uid);
- fprintf(stderr, " 0x%04x, /* gid */\n", raw_inode->gid);
- fprintf(stderr, " 0x%08x, /* atime */\n", raw_inode->atime);
- fprintf(stderr, " 0x%08x, /* mtime */\n", raw_inode->mtime);
- fprintf(stderr, " 0x%08x, /* ctime */\n", raw_inode->ctime);
- fprintf(stderr, " 0x%08x, /* offset */\n", raw_inode->offset);
- fprintf(stderr, " 0x%08x, /* dsize */\n", raw_inode->dsize);
- fprintf(stderr, " 0x%08x, /* rsize */\n", raw_inode->rsize);
- fprintf(stderr, " 0x%02x, /* nsize */\n", raw_inode->nsize);
- fprintf(stderr, " 0x%02x, /* nlink */\n", raw_inode->nlink);
- fprintf(stderr, " 0x%02x, /* spare */\n",
- raw_inode->spare);
- fprintf(stderr, " %u, /* rename */\n",
- raw_inode->rename);
- fprintf(stderr, " %u, /* deleted */\n",
- raw_inode->deleted);
- fprintf(stderr, " 0x%02x, /* accurate */\n",
- raw_inode->accurate);
- fprintf(stderr, " 0x%08x, /* dchksum */\n", raw_inode->dchksum);
- fprintf(stderr, " 0x%04x, /* nchksum */\n", raw_inode->nchksum);
- fprintf(stderr, " 0x%04x, /* chksum */\n", raw_inode->chksum);
- fprintf(stderr, "}\n");
-}
-
-static void write_val32(uint32_t *adr, uint32_t val)
-{
- switch(endian) {
- case ENDIAN_HOST:
- *adr = val;
- break;
- case ENDIAN_LITTLE:
- *adr = cpu_to_le32(val);
- break;
- case ENDIAN_BIG:
- *adr = cpu_to_be32(val);
- break;
- }
-}
-
-static void write_val16(uint16_t *adr, uint16_t val)
-{
- switch(endian) {
- case ENDIAN_HOST:
- *adr = val;
- break;
- case ENDIAN_LITTLE:
- *adr = cpu_to_le16(val);
- break;
- case ENDIAN_BIG:
- *adr = cpu_to_be16(val);
- break;
- }
-}
-
-static uint32_t read_val32(uint32_t *adr)
-{
- uint32_t val = 0;
-
- switch(endian) {
- case ENDIAN_HOST:
- val = *adr;
- break;
- case ENDIAN_LITTLE:
- val = le32_to_cpu(*adr);
- break;
- case ENDIAN_BIG:
- val = be32_to_cpu(*adr);
- break;
- }
- return val;
-}
-
-
-/* This function constructs a root inode with no name and
- no data. The inode is then written to the filesystem
- image. */
- int
-make_root_dir(FILE *fs, int first_ino, const char *root_dir_path, int depth)
-{
- struct jffs_file f;
- struct stat st;
-
- if (stat(root_dir_path, &st) < 0)
- {
- perror("stat");
- exit(1);
- }
-
- write_val32(&f.inode.magic, JFFS_MAGIC);
- write_val32(&f.inode.ino, first_ino);
- write_val32(&f.inode.pino, 0);
- write_val32(&f.inode.version, 1);
- write_val32(&f.inode.mode, st.st_mode);
- write_val16(&f.inode.uid, 0); /* root */
- write_val16(&f.inode.gid, 0); /* root */
- write_val32(&f.inode.atime, st.st_atime);
- write_val32(&f.inode.mtime, st.st_mtime);
- write_val32(&f.inode.ctime, st.st_ctime);
- write_val32(&f.inode.offset, 0);
- write_val32(&f.inode.dsize, 0);
- write_val32(&f.inode.rsize,0);
- f.inode.nsize = 0;
- /*f.inode.nlink = st.st_nlink;*/
- f.inode.nlink = 1;
- f.inode.spare = 0;
- f.inode.rename = 0;
- f.inode.deleted = 0;
- f.inode.accurate = 0;
- write_val32(&f.inode.dchksum, 0);
- write_val16(&f.inode.nchksum, 0);
- write_val16(&f.inode.chksum, 0);
- f.name = 0;
- f.data = 0;
- write_val16(&f.inode.chksum, jffs_checksum(&f.inode, sizeof(struct jffs_raw_inode)));
- f.inode.accurate = 0xff;
- write_file(&f, fs, st);
- if (verbose >= 1)
- {
- jffs_print_trace(root_dir_path, depth);
- }
- if (verbose >= 2)
- {
- jffs_print_raw_inode(&f.inode);
- }
- return first_ino;
-}
-
-
-/* This function writes a chunks of data. A data chunk consists of a
- raw inode, perhaps a name and perhaps some data. */
- void
-write_file(struct jffs_file *f, FILE *fs, struct stat st)
-{
- int npad = JFFS_GET_PAD_BYTES(f->inode.nsize);
- int dpad = JFFS_GET_PAD_BYTES(read_val32(&f->inode.dsize));
- int size = sizeof(struct jffs_raw_inode) + f->inode.nsize + npad
- + read_val32(&f->inode.dsize) + dpad;
- unsigned char ff_data[] = { 0xff, 0xff, 0xff, 0xff };
-
- if (verbose >= 2)
- {
- fprintf(stderr, "***write_file()\n");
- }
-
- /* Write the raw inode. */
- fwrite((void *)&f->inode, sizeof(struct jffs_raw_inode), 1, fs);
-
- /* Write the name. */
- if (f->inode.nsize)
- {
- fwrite(f->name, 1, f->inode.nsize, fs);
- if (npad)
- {
- fwrite(ff_data, 1, npad, fs);
- }
- }
-
- /* Write the data. */
- if (read_val32(&f->inode.dsize))
- {
- if (S_ISBLK(st.st_mode) || S_ISCHR(st.st_mode))
- {
- uint16_t tmp;
-
- switch(endian) {
- case ENDIAN_HOST:
- tmp = st.st_rdev;
- break;
- case ENDIAN_LITTLE:
- tmp = cpu_to_le16(st.st_rdev);
- break;
- case ENDIAN_BIG:
- tmp = cpu_to_be16(st.st_rdev);
- break;
- }
- fwrite((char *)&tmp, sizeof(st.st_rdev) / 4, 1, fs);
- }
- else
- {
- fwrite(f->data, 1, read_val32(&f->inode.dsize), fs);
- }
- if (dpad)
- {
- fwrite(ff_data, 1, dpad, fs);
- }
- }
-
- fs_pos += size;
- /* If the space left on the block is smaller than the size of an
- inode, then skip it. */
-}
-
-
- void
-read_data(struct jffs_file *f, const char *path, int offset)
-{
- FILE *file;
- char *tot_path;
- int pos = 0;
- int r;
-
- if (verbose >= 2)
- {
- fprintf(stderr, "***read_data(): f: 0x%08x, path: \"%s\", offset: %u\r\n",
- (unsigned int)f, path, offset);
- fprintf(stderr, " file's size: %u\n", read_val32(&f->inode.dsize));
- }
-
- if (!(f->data = (unsigned char *)malloc(read_val32(&f->inode.dsize))))
- {
- fprintf(stderr, "read_data(): malloc() failed! (*data)\n");
- exit(1);
- }
-
- if (!(tot_path = (char *)alloca(strlen(path) + f->inode.nsize + 1)))
- {
- fprintf(stderr, "read_data(): alloca() failed! (tot_path)\n");
- exit(1);
- }
- strcpy(tot_path, path);
- strncat(tot_path, f->name, f->inode.nsize);
-
- if (!(file = fopen(tot_path, "r")))
- {
- fprintf(stderr, "read_data(): Couldn't open \"%s\".\n", tot_path);
- exit(1);
- }
-
- if (fseek(file, offset, SEEK_SET) < 0)
- {
- fprintf(stderr, "read_data(): fseek failure: path = %s, offset = %u.\n",
- path, offset);
- exit(1);
- }
-
- while (pos < read_val32(&f->inode.dsize))
- {
- if ((r = fread(&f->data[pos], 1, read_val32(&f->inode.dsize) - pos, file)) < 0)
- {
- fprintf(stderr, "read_data(): fread failure (%s).\n", path);
- exit(1);
- }
- pos += r;
- }
-
- fclose(file);
-}
-
-
-/* This is the routine that constructs the filesystem image. */
- int
-mkfs(FILE *fs, const char *path, int ino, int parent, int depth)
-{
- struct dirent *dir_entry;
- DIR *dir;
- struct stat st;
- struct jffs_file f;
- int name_len;
- int pos = 0;
- int new_ino = ino;
- char *filename;
- int path_len = strlen(path);
-
- if (verbose >= 2)
- {
- fprintf(stderr, "***mkfs(): path: \"%s\"\r\n", path);
- }
-
- if (!(dir = opendir(path)))
- {
- perror("opendir");
- fprintf(stderr, "mkfs(): opendir() failed! (%s)\n", path);
- exit(1);
- }
-
- while ((dir_entry = readdir(dir)))
- {
- if (verbose >= 2)
- {
- fprintf(stderr, "mkfs(): name: %s\n", dir_entry->d_name);
- }
- name_len = strlen(dir_entry->d_name);
-
- if (((name_len == 1)
- && (dir_entry->d_name[0] == '.'))
- || ((name_len == 2)
- && (dir_entry->d_name[0] == '.')
- && (dir_entry->d_name[1] == '.')))
- {
- continue;
- }
-
- if (!(filename = (char *)alloca(path_len + name_len + 1)))
- {
- fprintf(stderr, "mkfs(): Allocation failed!\n");
- exit(0);
- }
- strcpy(filename, path);
- strcat(filename, dir_entry->d_name);
-
- if (verbose >= 2)
- {
- fprintf(stderr, "mkfs(): filename: %s\n", filename);
- }
-
- if (lstat(filename, &st) < 0)
- {
- perror("lstat");
- exit(1);
- }
-
- if (verbose >= 2)
- {
- fprintf(stderr, "mkfs(): filename: \"%s\", ino: %d, parent: %d\n",
- filename, new_ino, parent);
- }
-
- write_val32(&f.inode.magic, JFFS_MAGIC);
- write_val32(&f.inode.ino, new_ino);
- write_val32(&f.inode.pino, parent);
- write_val32(&f.inode.version, 1);
- write_val32(&f.inode.mode, st.st_mode);
- write_val16(&f.inode.uid, st.st_uid);
- write_val16(&f.inode.gid, st.st_gid);
- write_val32(&f.inode.atime, st.st_atime);
- write_val32(&f.inode.mtime, st.st_mtime);
- write_val32(&f.inode.ctime, st.st_ctime);
- write_val32(&f.inode.dsize, 0);
- write_val32(&f.inode.rsize, 0);
- f.inode.nsize = name_len;
- /*f.inode.nlink = st.st_nlink;*/
- f.inode.nlink = 1;
- f.inode.spare = 0;
- f.inode.rename = 0;
- f.inode.deleted = 0;
- f.inode.accurate = 0;
- write_val32(&f.inode.dchksum, 0);
- write_val16(&f.inode.nchksum, 0);
- write_val16(&f.inode.chksum, 0);
- if (dir_entry->d_name)
- {
- f.name = strdup(dir_entry->d_name);
- }
- else
- {
- f.name = 0;
- }
-
-repeat:
- write_val32(&f.inode.offset, pos);
- f.data = 0;
- f.inode.accurate = 0;
- if (S_ISREG(st.st_mode) && st.st_size)
- {
- if (st.st_size - pos < MAX_CHUNK_SIZE)
- {
- write_val32(&f.inode.dsize, st.st_size - pos);
- }
- else
- {
- write_val32(&f.inode.dsize, MAX_CHUNK_SIZE);
- }
-
- read_data(&f, path, pos);
- pos += read_val32(&f.inode.dsize);
- }
- else if (S_ISLNK(st.st_mode))
- {
- int linklen;
- char *linkdata = malloc(1000);
- if (!linkdata)
- {
- fprintf(stderr, "mkfs(): malloc() failed! (linkdata)\n");
- exit(1);
- }
- if ((linklen = readlink(filename, linkdata, 1000)) < 0)
- {
- free(linkdata);
- fprintf(stderr, "mkfs(): readlink() failed! f.name = \"%s\"\n",
- f.name);
- exit(1);
- }
-
- write_val32(&f.inode.dsize, linklen);
- f.data = (unsigned char *)linkdata;
- f.data[linklen] = '\0';
- }
- else if (S_ISBLK(st.st_mode) || S_ISCHR(st.st_mode))
- {
- write_val32(&f.inode.dsize, sizeof(st.st_rdev) / 4);
- }
-
- write_val16(&f.inode.chksum, 0);
- if (!S_ISBLK(st.st_mode) && !S_ISCHR(st.st_mode))
- {
- write_val32(&f.inode.dchksum, jffs_checksum((void *)f.data, read_val32(&f.inode.dsize)));
- }
- else
- {
- write_val32(&f.inode.dchksum, jffs_checksum((void *)&st.st_rdev, sizeof(st.st_rdev) / 4));
- }
-
- write_val16(&f.inode.nchksum, jffs_checksum((void *)f.name, f.inode.nsize));
- write_val16(&f.inode.chksum, jffs_checksum((void *)&f.inode, sizeof(struct jffs_raw_inode)));
- f.inode.accurate = 0xff;
-
- write_file(&f, fs, st);
- if (S_ISREG(st.st_mode) && st.st_size)
- {
- if (pos < st.st_size)
- {
- write_val32(&f.inode.version, read_val32(&f.inode.version) + 1);
- goto repeat;
- }
- }
-
- new_ino++;
- pos = 0;
- if (verbose >= 1)
- {
- jffs_print_trace(f.name, depth);
- }
- if (verbose >= 2)
- {
- jffs_print_raw_inode(&f.inode);
- }
-
- if (S_ISDIR(st.st_mode))
- {
- char *new_path;
-
- if (!(new_path = (char *)alloca(strlen(path) + name_len + 1 + 1)))
- {
- fprintf(stderr, "mkfs(): alloca() failed! (new_path)\n");
- exit(1);
- }
- strcpy(new_path, path);
- strncat(new_path, f.name, f.inode.nsize);
- strcat(new_path, "/");
-
- if (verbose >= 2)
- {
- fprintf(stderr, "mkfs(): new_path: \"%s\"\n", new_path);
- }
- new_ino = mkfs(fs, new_path, new_ino, new_ino - 1, depth + 1);
- }
- if (f.name)
- {
- free(f.name);
- }
- if (f.data)
- {
- free(f.data);
- }
- }
-
- closedir(dir);
- return new_ino;
-}
-
-
- void
-usage(void)
-{
- fprintf(stderr, "Usage: mkfs.jffs -d root_directory [-a little|big] [-e erase_size] [-o output_file] [-v[0-9]]\n");
- fprintf(stderr, " By default, the file system is built using the same endianness as the\n");
- fprintf(stderr, " host. If building for a different target, use the -a option.\n");
-}
-
-
- int
-main(int argc, char **argv)
-{
- FILE *fs;
- int root_ino;
- int len;
- int ch;
- extern int optind;
- extern char *optarg;
-
- fs = stdout; /* Send constructed file system to stdout by default */
-
- while ((ch = getopt(argc, argv, "a:d:e:v::o:h?")) != -1) {
- switch((char)ch) {
- case 'd':
- len = strlen(optarg);
- root_directory_name = (char *)malloc(len + 2);
- memcpy(root_directory_name, optarg, len);
- if (root_directory_name[len - 1] != '/')
- {
- root_directory_name[len++] = '/';
- }
- root_directory_name[len] = '\0';
- break;
- case 'v':
- if (!optarg || strlen(optarg) == 0) {
- verbose = 1;
- }
- else if (strlen(optarg) > 1 || !isdigit(optarg[0])) {
- fprintf(stderr, "verbose level must be between 0 and 9!\n");
- usage();
- exit(1);
- }
- else {
- verbose = strtol(optarg, NULL, 0);
- }
- break;
- case 'o':
- fs = fopen(optarg, "w");
- if (!fs) {
- fprintf(stderr, "unable to open file %s for output.\n", optarg);
- exit(1);
- }
- break;
- case 'a':
- if (strcmp(optarg, "little") == 0) {
- endian = ENDIAN_LITTLE;
- }
- else if (strcmp(optarg, "big") == 0) {
- endian = ENDIAN_BIG;
- }
- else {
- usage();
- exit(1);
- }
- break;
- case 'e':
- MAX_CHUNK_SIZE = strtol(optarg, NULL, 0) / 2;
- break;
- case 'h':
- case '?':
- default:
- usage();
- exit(0);
- }
- }
-
- if ((argc -= optind)) {
- usage();
- exit(1);
- }
-
- if (root_directory_name == NULL) {
- fprintf(stderr, "Error: must specify a root directory\n");
- usage();
- exit(1);
- }
-
- if (verbose >= 1)
- {
- fprintf(stderr, "Constructing JFFS filesystem...\n");
- }
- root_ino = make_root_dir(fs, JFFS_MIN_INO, root_directory_name, 0);
- mkfs(fs, root_directory_name, root_ino + 1, root_ino, 1);
-
- fclose(fs);
- free(root_directory_name);
- exit(0);
-}
projects / mtd-utils.git / commitdiff