* %End-Header%
*/
+#define _LARGEFILE_SOURCE
+#define _LARGEFILE64_SOURCE
+
#include <fcntl.h>
#include <grp.h>
#ifdef HAVE_GETOPT_H
#endif
#include <pwd.h>
#include <stdio.h>
+#ifdef HAVE_STDLIB_H
#include <stdlib.h>
+#endif
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/types.h>
-#include <linux/ext2_fs.h>
-
+#include "ext2fs/ext2_fs.h"
#include "ext2fs/ext2fs.h"
#include "et/com_err.h"
#include "uuid/uuid.h"
static void usage(void)
{
- fprintf(stderr, _("Usage: %s device file\n"), program_name);
+ fprintf(stderr, _("Usage: %s [-rsI] device image_file\n"),
+ program_name);
exit (1);
}
header_buf = malloc(blocksize);
if (!header_buf) {
- fprintf(stderr, _("Couldn't allocate header buffer\n"));
+ fputs(_("Couldn't allocate header buffer\n"), stderr);
exit(1);
}
exit(1);
}
memset(header_buf, 0, blocksize);
-
+
if (hdr)
memcpy(header_buf, hdr, sizeof(struct ext2_image_hdr));
-
+
actual = write(fd, header_buf, blocksize);
if (actual < 0) {
perror("write header");
exit(1);
}
if (actual != blocksize) {
- fprintf(stderr, _("short write (only %d bytes) for"
+ fprintf(stderr, _("short write (only %d bytes) for "
"writing image header"), actual);
exit(1);
}
free(header_buf);
}
-
-int main (int argc, char ** argv)
+static void write_image_file(ext2_filsys fs, int fd)
{
- int c;
- errcode_t retval;
- ext2_filsys fs;
- int open_flag = 0;
- int raw_flag = 0;
- int fd = 0;
- struct ext2_image_hdr hdr;
- struct stat st;
-
-#ifdef ENABLE_NLS
- setlocale(LC_MESSAGES, "");
- bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
- textdomain(NLS_CAT_NAME);
-#endif
- fprintf (stderr, _("e2image %s, %s for EXT2 FS %s, %s\n"),
- E2FSPROGS_VERSION, E2FSPROGS_DATE,
- EXT2FS_VERSION, EXT2FS_DATE);
- if (argc && *argv)
- program_name = *argv;
- initialize_ext2_error_table();
- while ((c = getopt (argc, argv, "r")) != EOF)
- switch (c) {
- case 'r':
- raw_flag++;
- break;
- default:
- usage();
- }
- if (optind != argc - 2 )
- usage();
- device_name = argv[optind];
- retval = ext2fs_open (device_name, open_flag, 0, 0,
- unix_io_manager, &fs);
- if (retval) {
- com_err (program_name, retval, _("while trying to open %s"),
- device_name);
- printf(_("Couldn't find valid filesystem superblock.\n"));
- exit(1);
- }
-
- fd = open(argv[optind+1], O_CREAT|O_RDWR, 0600);
- if (fd < 0) {
- com_err(program_name, errno, _("while trying to open %s"),
- argv[optind+1]);
- exit(1);
- }
+ struct ext2_image_hdr hdr;
+ struct stat st;
+ errcode_t retval;
write_header(fd, NULL, fs->blocksize);
memset(&hdr, 0, sizeof(struct ext2_image_hdr));
-
+
hdr.offset_super = lseek(fd, 0, SEEK_CUR);
retval = ext2fs_image_super_write(fs, fd, 0);
if (retval) {
com_err(program_name, retval, _("while writing superblock"));
exit(1);
}
-
+
hdr.offset_inode = lseek(fd, 0, SEEK_CUR);
- retval = ext2fs_image_inode_write(fs, fd, IMAGER_FLAG_SPARSEWRITE);
+ retval = ext2fs_image_inode_write(fs, fd,
+ (fd != 1) ? IMAGER_FLAG_SPARSEWRITE : 0);
if (retval) {
com_err(program_name, retval, _("while writing inode table"));
exit(1);
}
-
+
hdr.offset_blockmap = lseek(fd, 0, SEEK_CUR);
retval = ext2fs_image_bitmap_write(fs, fd, 0);
if (retval) {
hdr.magic_number = EXT2_ET_MAGIC_E2IMAGE;
strcpy(hdr.magic_descriptor, "Ext2 Image 1.0");
gethostname(hdr.fs_hostname, sizeof(hdr.fs_hostname));
- strncat(hdr.fs_device_name, device_name, sizeof(hdr.fs_device_name));
+ strncpy(hdr.fs_device_name, device_name, sizeof(hdr.fs_device_name)-1);
hdr.fs_device_name[sizeof(hdr.fs_device_name) - 1] = 0;
hdr.fs_blocksize = fs->blocksize;
-
+
if (stat(device_name, &st) == 0)
hdr.fs_device = st.st_rdev;
hdr.image_time = time(0);
write_header(fd, &hdr, fs->blocksize);
+}
+
+/*
+ * These set of functions are used to write a RAW image file.
+ */
+ext2fs_block_bitmap meta_block_map;
+ext2fs_block_bitmap scramble_block_map; /* Directory blocks to be scrambled */
+
+struct process_block_struct {
+ ext2_ino_t ino;
+ int is_dir;
+};
+
+/*
+ * These subroutines short circuits ext2fs_get_blocks and
+ * ext2fs_check_directory; we use them since we already have the inode
+ * structure, so there's no point in letting the ext2fs library read
+ * the inode again.
+ */
+static ino_t stashed_ino = 0;
+static struct ext2_inode *stashed_inode;
+
+static errcode_t meta_get_blocks(ext2_filsys fs EXT2FS_ATTR((unused)),
+ ext2_ino_t ino,
+ blk_t *blocks)
+{
+ int i;
+
+ if ((ino != stashed_ino) || !stashed_inode)
+ return EXT2_ET_CALLBACK_NOTHANDLED;
+
+ for (i=0; i < EXT2_N_BLOCKS; i++)
+ blocks[i] = stashed_inode->i_block[i];
+ return 0;
+}
+
+static errcode_t meta_check_directory(ext2_filsys fs EXT2FS_ATTR((unused)),
+ ext2_ino_t ino)
+{
+ if ((ino != stashed_ino) || !stashed_inode)
+ return EXT2_ET_CALLBACK_NOTHANDLED;
+
+ if (!LINUX_S_ISDIR(stashed_inode->i_mode))
+ return EXT2_ET_NO_DIRECTORY;
+ return 0;
+}
+
+static errcode_t meta_read_inode(ext2_filsys fs EXT2FS_ATTR((unused)),
+ ext2_ino_t ino,
+ struct ext2_inode *inode)
+{
+ if ((ino != stashed_ino) || !stashed_inode)
+ return EXT2_ET_CALLBACK_NOTHANDLED;
+ *inode = *stashed_inode;
+ return 0;
+}
+
+static void use_inode_shortcuts(ext2_filsys fs, int bool)
+{
+ if (bool) {
+ fs->get_blocks = meta_get_blocks;
+ fs->check_directory = meta_check_directory;
+ fs->read_inode = meta_read_inode;
+ stashed_ino = 0;
+ } else {
+ fs->get_blocks = 0;
+ fs->check_directory = 0;
+ fs->read_inode = 0;
+ }
+}
+
+static int process_dir_block(ext2_filsys fs EXT2FS_ATTR((unused)),
+ blk_t *block_nr,
+ e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
+ blk_t ref_block EXT2FS_ATTR((unused)),
+ int ref_offset EXT2FS_ATTR((unused)),
+ void *priv_data EXT2FS_ATTR((unused)))
+{
+ struct process_block_struct *p;
+
+ p = (struct process_block_struct *) priv_data;
+
+ ext2fs_mark_block_bitmap2(meta_block_map, *block_nr);
+ if (scramble_block_map && p->is_dir && blockcnt >= 0)
+ ext2fs_mark_block_bitmap2(scramble_block_map, *block_nr);
+ return 0;
+}
+
+static int process_file_block(ext2_filsys fs EXT2FS_ATTR((unused)),
+ blk_t *block_nr,
+ e2_blkcnt_t blockcnt,
+ blk_t ref_block EXT2FS_ATTR((unused)),
+ int ref_offset EXT2FS_ATTR((unused)),
+ void *priv_data EXT2FS_ATTR((unused)))
+{
+ if (blockcnt < 0) {
+ ext2fs_mark_block_bitmap2(meta_block_map, *block_nr);
+ }
+ return 0;
+}
+
+static void mark_table_blocks(ext2_filsys fs)
+{
+ blk_t first_block, b;
+ unsigned int i,j;
+
+ first_block = fs->super->s_first_data_block;
+ /*
+ * Mark primary superblock
+ */
+ ext2fs_mark_block_bitmap2(meta_block_map, first_block);
+
+ /*
+ * Mark the primary superblock descriptors
+ */
+ for (j = 0; j < fs->desc_blocks; j++) {
+ ext2fs_mark_block_bitmap2(meta_block_map,
+ ext2fs_descriptor_block_loc(fs, first_block, j));
+ }
+
+ for (i = 0; i < fs->group_desc_count; i++) {
+ /*
+ * Mark the blocks used for the inode table
+ */
+ if (ext2fs_inode_table_loc(fs, i)) {
+ for (j = 0, b = ext2fs_inode_table_loc(fs, i);
+ j < (unsigned) fs->inode_blocks_per_group;
+ j++, b++)
+ ext2fs_mark_block_bitmap2(meta_block_map, b);
+ }
+
+ /*
+ * Mark block used for the block bitmap
+ */
+ if (ext2fs_block_bitmap_loc(fs, i)) {
+ ext2fs_mark_block_bitmap2(meta_block_map,
+ ext2fs_block_bitmap_loc(fs, i));
+ }
+
+ /*
+ * Mark block used for the inode bitmap
+ */
+ if (ext2fs_inode_bitmap_loc(fs, i)) {
+ ext2fs_mark_block_bitmap2(meta_block_map,
+ ext2fs_inode_bitmap_loc(fs, i));
+ }
+ }
+}
+
+/*
+ * This function returns 1 if the specified block is all zeros
+ */
+static int check_zero_block(char *buf, int blocksize)
+{
+ char *cp = buf;
+ int left = blocksize;
+
+ while (left > 0) {
+ if (*cp++)
+ return 0;
+ left--;
+ }
+ return 1;
+}
+
+static void write_block(int fd, char *buf, int sparse_offset,
+ int blocksize, blk_t block)
+{
+ int count;
+ errcode_t err;
+
+ if (sparse_offset) {
+#ifdef HAVE_LSEEK64
+ if (lseek64(fd, sparse_offset, SEEK_CUR) < 0)
+ perror("lseek");
+#else
+ if (lseek(fd, sparse_offset, SEEK_CUR) < 0)
+ perror("lseek");
+#endif
+ }
+ if (blocksize) {
+ count = write(fd, buf, blocksize);
+ if (count != blocksize) {
+ if (count == -1)
+ err = errno;
+ else
+ err = 0;
+ com_err(program_name, err, "error writing block %u",
+ block);
+ exit(1);
+ }
+ }
+}
+
+int name_id[256];
+
+#define EXT4_MAX_REC_LEN ((1<<16)-1)
+
+static void scramble_dir_block(ext2_filsys fs, blk_t blk, char *buf)
+{
+ char *p, *end, *cp;
+ struct ext2_dir_entry_2 *dirent;
+ unsigned int rec_len;
+ int id, len;
+
+ end = buf + fs->blocksize;
+ for (p = buf; p < end-8; p += rec_len) {
+ dirent = (struct ext2_dir_entry_2 *) p;
+ rec_len = dirent->rec_len;
+#ifdef WORDS_BIGENDIAN
+ rec_len = ext2fs_swab16(rec_len);
+#endif
+ if (rec_len == EXT4_MAX_REC_LEN || rec_len == 0)
+ rec_len = fs->blocksize;
+ else
+ rec_len = (rec_len & 65532) | ((rec_len & 3) << 16);
+#if 0
+ printf("rec_len = %d, name_len = %d\n", rec_len, dirent->name_len);
+#endif
+ if (rec_len < 8 || (rec_len % 4) ||
+ (p+rec_len > end)) {
+ printf("Corrupt directory block %lu: "
+ "bad rec_len (%d)\n", (unsigned long) blk,
+ rec_len);
+ rec_len = end - p;
+ (void) ext2fs_set_rec_len(fs, rec_len,
+ (struct ext2_dir_entry *) dirent);
+#ifdef WORDS_BIGENDIAN
+ dirent->rec_len = ext2fs_swab16(dirent->rec_len);
+#endif
+ continue;
+ }
+ if (dirent->name_len + 8 > rec_len) {
+ printf("Corrupt directory block %lu: "
+ "bad name_len (%d)\n", (unsigned long) blk,
+ dirent->name_len);
+ dirent->name_len = rec_len - 8;
+ continue;
+ }
+ cp = p+8;
+ len = rec_len - dirent->name_len - 8;
+ if (len > 0)
+ memset(cp+dirent->name_len, 0, len);
+ if (dirent->name_len==1 && cp[0] == '.')
+ continue;
+ if (dirent->name_len==2 && cp[0] == '.' && cp[1] == '.')
+ continue;
+
+ memset(cp, 'A', dirent->name_len);
+ len = dirent->name_len;
+ id = name_id[len]++;
+ while ((len > 0) && (id > 0)) {
+ *cp += id % 26;
+ id = id / 26;
+ cp++;
+ len--;
+ }
+ }
+}
+
+static void output_meta_data_blocks(ext2_filsys fs, int fd)
+{
+ errcode_t retval;
+ blk_t blk;
+ char *buf, *zero_buf;
+ int sparse = 0;
+
+ buf = malloc(fs->blocksize);
+ if (!buf) {
+ com_err(program_name, ENOMEM, "while allocating buffer");
+ exit(1);
+ }
+ zero_buf = malloc(fs->blocksize);
+ if (!zero_buf) {
+ com_err(program_name, ENOMEM, "while allocating buffer");
+ exit(1);
+ }
+ memset(zero_buf, 0, fs->blocksize);
+ for (blk = 0; blk < ext2fs_blocks_count(fs->super); blk++) {
+ if ((blk >= fs->super->s_first_data_block) &&
+ ext2fs_test_block_bitmap2(meta_block_map, blk)) {
+ retval = io_channel_read_blk64(fs->io, blk, 1, buf);
+ if (retval) {
+ com_err(program_name, retval,
+ "error reading block %u", blk);
+ }
+ if (scramble_block_map &&
+ ext2fs_test_block_bitmap2(scramble_block_map, blk))
+ scramble_dir_block(fs, blk, buf);
+ if ((fd != 1) && check_zero_block(buf, fs->blocksize))
+ goto sparse_write;
+ write_block(fd, buf, sparse, fs->blocksize, blk);
+ sparse = 0;
+ } else {
+ sparse_write:
+ if (fd == 1) {
+ write_block(fd, zero_buf, 0,
+ fs->blocksize, blk);
+ continue;
+ }
+ sparse += fs->blocksize;
+ if (sparse >= 1024*1024) {
+ write_block(fd, 0, sparse, 0, 0);
+ sparse = 0;
+ }
+ }
+ }
+ if (sparse)
+ write_block(fd, zero_buf, sparse-1, 1, -1);
+ free(zero_buf);
+ free(buf);
+}
+
+static void write_raw_image_file(ext2_filsys fs, int fd, int scramble_flag)
+{
+ struct process_block_struct pb;
+ struct ext2_inode inode;
+ ext2_inode_scan scan;
+ ext2_ino_t ino;
+ errcode_t retval;
+ char * block_buf;
+
+ retval = ext2fs_allocate_block_bitmap(fs, "in-use block map",
+ &meta_block_map);
+ if (retval) {
+ com_err(program_name, retval, "while allocating block bitmap");
+ exit(1);
+ }
+
+ if (scramble_flag) {
+ retval = ext2fs_allocate_block_bitmap(fs, "scramble block map",
+ &scramble_block_map);
+ if (retval) {
+ com_err(program_name, retval,
+ "while allocating scramble block bitmap");
+ exit(1);
+ }
+ }
+
+ mark_table_blocks(fs);
+
+ retval = ext2fs_open_inode_scan(fs, 0, &scan);
+ if (retval) {
+ com_err(program_name, retval, _("while opening inode scan"));
+ exit(1);
+ }
+
+ block_buf = malloc(fs->blocksize * 3);
+ if (!block_buf) {
+ com_err(program_name, 0, "Can't allocate block buffer");
+ exit(1);
+ }
+
+ use_inode_shortcuts(fs, 1);
+ stashed_inode = &inode;
+ while (1) {
+ retval = ext2fs_get_next_inode(scan, &ino, &inode);
+ if (retval == EXT2_ET_BAD_BLOCK_IN_INODE_TABLE)
+ continue;
+ if (retval) {
+ com_err(program_name, retval,
+ _("while getting next inode"));
+ exit(1);
+ }
+ if (ino == 0)
+ break;
+ if (!inode.i_links_count)
+ continue;
+ if (ext2fs_file_acl_block(&inode)) {
+ ext2fs_mark_block_bitmap2(meta_block_map,
+ ext2fs_file_acl_block(&inode));
+ }
+ if (!ext2fs_inode_has_valid_blocks(&inode))
+ continue;
+
+ stashed_ino = ino;
+ pb.ino = ino;
+ pb.is_dir = LINUX_S_ISDIR(inode.i_mode);
+ if (LINUX_S_ISDIR(inode.i_mode) ||
+ (LINUX_S_ISLNK(inode.i_mode) &&
+ ext2fs_inode_has_valid_blocks(&inode)) ||
+ ino == fs->super->s_journal_inum) {
+ retval = ext2fs_block_iterate2(fs, ino,
+ BLOCK_FLAG_READ_ONLY, block_buf,
+ process_dir_block, &pb);
+ if (retval) {
+ com_err(program_name, retval,
+ "while iterating over inode %u",
+ ino);
+ exit(1);
+ }
+ } else {
+ if ((inode.i_flags & EXT4_EXTENTS_FL) ||
+ inode.i_block[EXT2_IND_BLOCK] ||
+ inode.i_block[EXT2_DIND_BLOCK] ||
+ inode.i_block[EXT2_TIND_BLOCK]) {
+ retval = ext2fs_block_iterate2(fs,
+ ino, BLOCK_FLAG_READ_ONLY, block_buf,
+ process_file_block, &pb);
+ if (retval) {
+ com_err(program_name, retval,
+ "while iterating over inode %u", ino);
+ exit(1);
+ }
+ }
+ }
+ }
+ use_inode_shortcuts(fs, 0);
+ output_meta_data_blocks(fs, fd);
+ free(block_buf);
+}
+
+static void install_image(char *device, char *image_fn, int raw_flag)
+{
+ errcode_t retval;
+ ext2_filsys fs;
+ int open_flag = EXT2_FLAG_IMAGE_FILE;
+ int fd = 0;
+ io_manager io_ptr;
+ io_channel io, image_io;
+
+ if (raw_flag) {
+ com_err(program_name, 0, "Raw images cannot be installed");
+ exit(1);
+ }
+
+#ifdef CONFIG_TESTIO_DEBUG
+ if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
+ io_ptr = test_io_manager;
+ test_io_backing_manager = unix_io_manager;
+ } else
+#endif
+ io_ptr = unix_io_manager;
+
+ retval = ext2fs_open (image_fn, open_flag, 0, 0,
+ io_ptr, &fs);
+ if (retval) {
+ com_err (program_name, retval, _("while trying to open %s"),
+ image_fn);
+ exit(1);
+ }
+
+ retval = ext2fs_read_bitmaps (fs);
+ if (retval) {
+ com_err(program_name, retval, "error reading bitmaps");
+ exit(1);
+ }
+
+#ifdef HAVE_OPEN64
+ fd = open64(image_fn, O_RDONLY);
+#else
+ fd = open(image_fn, O_RDONLY);
+#endif
+ if (fd < 0) {
+ perror(image_fn);
+ exit(1);
+ }
+
+ retval = io_ptr->open(device, IO_FLAG_RW, &io);
+ if (retval) {
+ com_err(device, 0, "while opening device file");
+ exit(1);
+ }
+
+ image_io = fs->io;
+
+ ext2fs_rewrite_to_io(fs, io);
+
+ if (lseek(fd, fs->image_header->offset_inode, SEEK_SET) < 0) {
+ perror("lseek");
+ exit(1);
+ }
+
+ retval = ext2fs_image_inode_read(fs, fd, 0);
+ if (retval) {
+ com_err(image_fn, 0, "while restoring the image table");
+ exit(1);
+ }
ext2fs_close (fs);
exit (0);
}
+int main (int argc, char ** argv)
+{
+ int c;
+ errcode_t retval;
+ ext2_filsys fs;
+ char *image_fn;
+ int open_flag = 0;
+ int raw_flag = 0;
+ int install_flag = 0;
+ int scramble_flag = 0;
+ int fd = 0;
+
+#ifdef ENABLE_NLS
+ setlocale(LC_MESSAGES, "");
+ setlocale(LC_CTYPE, "");
+ bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
+ textdomain(NLS_CAT_NAME);
+#endif
+ fprintf (stderr, "e2image %s (%s)\n", E2FSPROGS_VERSION,
+ E2FSPROGS_DATE);
+ if (argc && *argv)
+ program_name = *argv;
+ add_error_table(&et_ext2_error_table);
+ while ((c = getopt (argc, argv, "rsI")) != EOF)
+ switch (c) {
+ case 'r':
+ raw_flag++;
+ break;
+ case 's':
+ scramble_flag++;
+ break;
+ case 'I':
+ install_flag++;
+ break;
+ default:
+ usage();
+ }
+ if (optind != argc - 2 )
+ usage();
+ device_name = argv[optind];
+ image_fn = argv[optind+1];
+
+ if (install_flag) {
+ install_image(device_name, image_fn, raw_flag);
+ exit (0);
+ }
+
+ retval = ext2fs_open (device_name, open_flag, 0, 0,
+ unix_io_manager, &fs);
+ if (retval) {
+ com_err (program_name, retval, _("while trying to open %s"),
+ device_name);
+ fputs(_("Couldn't find valid filesystem superblock.\n"), stdout);
+ exit(1);
+ }
+
+ if (strcmp(image_fn, "-") == 0)
+ fd = 1;
+ else {
+#ifdef HAVE_OPEN64
+ fd = open64(image_fn, O_CREAT|O_TRUNC|O_WRONLY, 0600);
+#else
+ fd = open(image_fn, O_CREAT|O_TRUNC|O_WRONLY, 0600);
+#endif
+ if (fd < 0) {
+ com_err(program_name, errno,
+ _("while trying to open %s"), argv[optind+1]);
+ exit(1);
+ }
+ }
+
+ if (raw_flag)
+ write_raw_image_file(fs, fd, scramble_flag);
+ else
+ write_image_file(fs, fd);
+ ext2fs_close (fs);
+ remove_error_table(&et_ext2_error_table);
+ exit (0);
+}
git://git.whamcloud.com / tools / e2fsprogs.git / blobdiff