#include "ext2_fs.h"
-
#include "ext2fs.h"
#include "e2image.h"
manager, ret_fs);
}
+static void block_sha_map_free_entry(void *data)
+{
+ free(data);
+ return;
+}
+
/*
* Note: if superblock is non-zero, block-size must also be non-zero.
* Superblock and block_size can be zero to use the default size.
blk64_t group_block, blk;
char *dest, *cp;
int group_zero_adjust = 0;
+ unsigned int inode_size;
+ __u64 groups_cnt;
#ifdef WORDS_BIGENDIAN
unsigned int groups_per_block;
struct ext2_group_desc *gdp;
int j;
#endif
+ char *time_env;
+ int csum_retries = 0;
EXT2_CHECK_MAGIC(manager, EXT2_ET_MAGIC_IO_MANAGER);
/* don't overwrite sb backups unless flag is explicitly cleared */
fs->flags |= EXT2_FLAG_MASTER_SB_ONLY;
fs->umask = 022;
+
+ time_env = ext2fs_safe_getenv("SOURCE_DATE_EPOCH");
+ if (time_env) {
+ fs->now = strtoul(time_env, NULL, 0);
+ fs->flags2 |= EXT2_FLAG2_USE_FAKE_TIME;
+ } else {
+ time_env = ext2fs_safe_getenv("E2FSPROGS_FAKE_TIME");
+ if (time_env)
+ fs->now = strtoul(time_env, NULL, 0);
+ }
+
retval = ext2fs_get_mem(strlen(name)+1, &fs->device_name);
if (retval)
goto cleanup;
io_flags |= IO_FLAG_EXCLUSIVE;
if (flags & EXT2_FLAG_DIRECT_IO)
io_flags |= IO_FLAG_DIRECT_IO;
+ if (flags & EXT2_FLAG_THREADS)
+ io_flags |= IO_FLAG_THREADS;
retval = manager->open(fs->device_name, io_flags, &fs->io);
if (retval)
goto cleanup;
fs->image_header);
if (retval)
goto cleanup;
- if (fs->image_header->magic_number != EXT2_ET_MAGIC_E2IMAGE)
+ if (ext2fs_le32_to_cpu(fs->image_header->magic_number) != EXT2_ET_MAGIC_E2IMAGE)
return EXT2_ET_MAGIC_E2IMAGE;
superblock = 1;
- block_size = fs->image_header->fs_blocksize;
+ block_size = ext2fs_le32_to_cpu(fs->image_header->fs_blocksize);
}
/*
if (retval)
goto cleanup;
}
+retry:
retval = io_channel_read_blk(fs->io, superblock, -SUPERBLOCK_SIZE,
fs->super);
if (retval)
retval = 0;
if (!ext2fs_verify_csum_type(fs, fs->super))
retval = EXT2_ET_UNKNOWN_CSUM;
- if (!ext2fs_superblock_csum_verify(fs, fs->super))
+ if (!ext2fs_superblock_csum_verify(fs, fs->super)) {
+ if (csum_retries++ < 3)
+ goto retry;
retval = EXT2_ET_SB_CSUM_INVALID;
+ }
}
#ifdef WORDS_BIGENDIAN
}
}
- if (fs->super->s_log_block_size >
- (unsigned) (EXT2_MAX_BLOCK_LOG_SIZE - EXT2_MIN_BLOCK_LOG_SIZE)) {
+ if ((fs->super->s_log_block_size >
+ (unsigned) (EXT2_MAX_BLOCK_LOG_SIZE - EXT2_MIN_BLOCK_LOG_SIZE)) ||
+ (fs->super->s_log_cluster_size >
+ (unsigned) (EXT2_MAX_CLUSTER_LOG_SIZE - EXT2_MIN_CLUSTER_LOG_SIZE)) ||
+ (fs->super->s_log_block_size > fs->super->s_log_cluster_size) ||
+ (fs->super->s_log_groups_per_flex > 31)) {
retval = EXT2_ET_CORRUPT_SUPERBLOCK;
goto cleanup;
}
goto cleanup;
}
fs->fragsize = fs->blocksize = EXT2_BLOCK_SIZE(fs->super);
- if (EXT2_INODE_SIZE(fs->super) < EXT2_GOOD_OLD_INODE_SIZE) {
+ inode_size = EXT2_INODE_SIZE(fs->super);
+ if ((inode_size < EXT2_GOOD_OLD_INODE_SIZE) ||
+ (inode_size > fs->blocksize) ||
+ (inode_size & (inode_size - 1))) {
retval = EXT2_ET_CORRUPT_SUPERBLOCK;
goto cleanup;
}
/* Enforce the block group descriptor size */
if (ext2fs_has_feature_64bit(fs->super)) {
- if (fs->super->s_desc_size < EXT2_MIN_DESC_SIZE_64BIT) {
- retval = EXT2_ET_BAD_DESC_SIZE;
- goto cleanup;
- }
- } else {
- if (fs->super->s_desc_size &&
- fs->super->s_desc_size != EXT2_MIN_DESC_SIZE) {
+ unsigned desc_size = fs->super->s_desc_size;
+
+ if (desc_size == 0 ||
+ (!(flags & EXT2_FLAG_IGNORE_SB_ERRORS) &&
+ ((desc_size > EXT2_MAX_DESC_SIZE) ||
+ (desc_size < EXT2_MIN_DESC_SIZE_64BIT) ||
+ (desc_size & (desc_size - 1)) != 0))) {
retval = EXT2_ET_BAD_DESC_SIZE;
goto cleanup;
}
* Read group descriptors
*/
blocks_per_group = EXT2_BLOCKS_PER_GROUP(fs->super);
- if (blocks_per_group == 0 ||
+ if (blocks_per_group < 8 ||
blocks_per_group > EXT2_MAX_BLOCKS_PER_GROUP(fs->super) ||
fs->inode_blocks_per_group > EXT2_MAX_INODES_PER_GROUP(fs->super) ||
EXT2_DESC_PER_BLOCK(fs->super) == 0 ||
retval = EXT2_ET_CORRUPT_SUPERBLOCK;
goto cleanup;
}
- fs->group_desc_count = ext2fs_div64_ceil(ext2fs_blocks_count(fs->super) -
- fs->super->s_first_data_block,
- blocks_per_group);
- if (fs->group_desc_count * EXT2_INODES_PER_GROUP(fs->super) !=
+ groups_cnt = ext2fs_div64_ceil(ext2fs_blocks_count(fs->super) -
+ fs->super->s_first_data_block,
+ blocks_per_group);
+ if (groups_cnt >> 32) {
+ retval = EXT2_ET_CORRUPT_SUPERBLOCK;
+ goto cleanup;
+ }
+ fs->group_desc_count = groups_cnt;
+ if (!(flags & EXT2_FLAG_IGNORE_SB_ERRORS) &&
+ (__u64)fs->group_desc_count * EXT2_INODES_PER_GROUP(fs->super) !=
fs->super->s_inodes_count) {
retval = EXT2_ET_CORRUPT_SUPERBLOCK;
goto cleanup;
}
fs->desc_blocks = ext2fs_div_ceil(fs->group_desc_count,
EXT2_DESC_PER_BLOCK(fs->super));
+ if (ext2fs_has_feature_meta_bg(fs->super) &&
+ (fs->super->s_first_meta_bg > fs->desc_blocks) &&
+ !(flags & EXT2_FLAG_IGNORE_SB_ERRORS)) {
+ retval = EXT2_ET_CORRUPT_SUPERBLOCK;
+ goto cleanup;
+ }
+ if (flags & EXT2_FLAG_SUPER_ONLY)
+ goto skip_read_bg;
retval = ext2fs_get_array(fs->desc_blocks, fs->blocksize,
&fs->group_desc);
if (retval)
#ifdef WORDS_BIGENDIAN
groups_per_block = EXT2_DESC_PER_BLOCK(fs->super);
#endif
- if (ext2fs_has_feature_meta_bg(fs->super)) {
+ if (ext2fs_has_feature_meta_bg(fs->super) &&
+ !(flags & EXT2_FLAG_IMAGE_FILE)) {
first_meta_bg = fs->super->s_first_meta_bg;
if (first_meta_bg > fs->desc_blocks)
first_meta_bg = fs->desc_blocks;
gdp = (struct ext2_group_desc *) dest;
for (j=0; j < groups_per_block*first_meta_bg; j++) {
gdp = ext2fs_group_desc(fs, fs->group_desc, j);
- ext2fs_swap_group_desc2(fs, gdp);
+ if (gdp)
+ ext2fs_swap_group_desc2(fs, gdp);
}
#endif
dest += fs->blocksize*first_meta_bg;
for (j=0; j < groups_per_block; j++) {
gdp = ext2fs_group_desc(fs, fs->group_desc,
i * groups_per_block + j);
- ext2fs_swap_group_desc2(fs, gdp);
+ if (gdp)
+ ext2fs_swap_group_desc2(fs, gdp);
}
#endif
dest += fs->blocksize;
if (fs->flags & EXT2_FLAG_RW)
ext2fs_mark_super_dirty(fs);
}
-
+skip_read_bg:
if (ext2fs_has_feature_mmp(fs->super) &&
!(flags & EXT2_FLAG_SKIP_MMP) &&
(flags & (EXT2_FLAG_RW | EXT2_FLAG_EXCLUSIVE))) {
}
}
+ if (fs->flags & EXT2_FLAG_SHARE_DUP) {
+ fs->block_sha_map = ext2fs_hashmap_create(ext2fs_djb2_hash,
+ block_sha_map_free_entry, 4096);
+ if (!fs->block_sha_map) {
+ retval = EXT2_ET_NO_MEMORY;
+ goto cleanup;
+ }
+ ext2fs_set_feature_shared_blocks(fs->super);
+ }
+
+ if (ext2fs_has_feature_casefold(fs->super))
+ fs->encoding = ext2fs_load_nls_table(fs->super->s_encoding);
+
fs->flags &= ~EXT2_FLAG_NOFREE_ON_ERROR;
*ret_fs = fs;