* Copyright (C) 1993, 1994, 1995, 1996 Theodore Ts'o.
*
* %Begin-Header%
- * This file may be redistributed under the terms of the GNU Public
- * License.
+ * This file may be redistributed under the terms of the GNU Library
+ * General Public License, version 2.
* %End-Header%
*/
+#include "config.h"
#include <stdio.h>
#include <string.h>
#if HAVE_UNISTD_H
#if HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
+#ifdef HAVE_ERRNO_H
+#include <errno.h>
+#endif
#include "ext2_fs.h"
*/
if (group_block != fs->super->s_first_data_block &&
((ret_blk + fs->super->s_blocks_per_group) <
- fs->super->s_blocks_count))
+ ext2fs_blocks_count(fs->super)))
ret_blk += fs->super->s_blocks_per_group;
return ret_blk;
}
* EXT2_FLAG_FORCE - Open the filesystem even if some of the
* features aren't supported.
* EXT2_FLAG_JOURNAL_DEV_OK - Open an ext3 journal device
+ * EXT2_FLAG_SKIP_MMP - Open without multi-mount protection check.
*/
errcode_t ext2fs_open2(const char *name, const char *io_options,
int flags, int superblock,
errcode_t retval;
unsigned long i, first_meta_bg;
__u32 features;
- int groups_per_block, blocks_per_group, io_flags;
- blk_t group_block, blk;
+ unsigned int groups_per_block, blocks_per_group, io_flags;
+ blk64_t group_block, blk;
char *dest, *cp;
#ifdef WORDS_BIGENDIAN
struct ext2_group_desc *gdp;
io_flags |= IO_FLAG_RW;
if (flags & EXT2_FLAG_EXCLUSIVE)
io_flags |= IO_FLAG_EXCLUSIVE;
+ if (flags & EXT2_FLAG_DIRECT_IO)
+ io_flags |= IO_FLAG_DIRECT_IO;
retval = manager->open(fs->device_name, io_flags, &fs->io);
if (retval)
goto cleanup;
goto cleanup;
fs->image_io = fs->io;
fs->io->app_data = fs;
- retval = ext2fs_get_mem(SUPERBLOCK_SIZE, &fs->super);
+ retval = ext2fs_get_memalign(SUPERBLOCK_SIZE, 512, &fs->super);
if (retval)
goto cleanup;
if (flags & EXT2_FLAG_IMAGE_FILE) {
features = fs->super->s_feature_incompat;
#ifdef EXT2_LIB_SOFTSUPP_INCOMPAT
if (flags & EXT2_FLAG_SOFTSUPP_FEATURES)
- features &= !EXT2_LIB_SOFTSUPP_INCOMPAT;
+ features &= ~EXT2_LIB_SOFTSUPP_INCOMPAT;
#endif
if (features & ~EXT2_LIB_FEATURE_INCOMPAT_SUPP) {
retval = EXT2_ET_UNSUPP_FEATURE;
features = fs->super->s_feature_ro_compat;
#ifdef EXT2_LIB_SOFTSUPP_RO_COMPAT
if (flags & EXT2_FLAG_SOFTSUPP_FEATURES)
- features &= !EXT2_LIB_SOFTSUPP_RO_COMPAT;
+ features &= ~EXT2_LIB_SOFTSUPP_RO_COMPAT;
#endif
if ((flags & EXT2_FLAG_RW) &&
(features & ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP)) {
retval = EXT2_ET_CORRUPT_SUPERBLOCK;
goto cleanup;
}
- fs->blocksize = EXT2_BLOCK_SIZE(fs->super);
+ if (!EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
+ EXT4_FEATURE_RO_COMPAT_BIGALLOC) &&
+ (fs->super->s_log_block_size != fs->super->s_log_cluster_size)) {
+ retval = EXT2_ET_CORRUPT_SUPERBLOCK;
+ goto cleanup;
+ }
+ fs->fragsize = fs->blocksize = EXT2_BLOCK_SIZE(fs->super);
if (EXT2_INODE_SIZE(fs->super) < EXT2_GOOD_OLD_INODE_SIZE) {
retval = EXT2_ET_CORRUPT_SUPERBLOCK;
goto cleanup;
}
- fs->fragsize = EXT2_FRAG_SIZE(fs->super);
+ fs->cluster_ratio_bits = fs->super->s_log_cluster_size -
+ fs->super->s_log_block_size;
+ if (EXT2_BLOCKS_PER_GROUP(fs->super) !=
+ EXT2_CLUSTERS_PER_GROUP(fs->super) << fs->cluster_ratio_bits) {
+ retval = EXT2_ET_CORRUPT_SUPERBLOCK;
+ goto cleanup;
+ }
fs->inode_blocks_per_group = ((EXT2_INODES_PER_GROUP(fs->super) *
EXT2_INODE_SIZE(fs->super) +
EXT2_BLOCK_SIZE(fs->super) - 1) /
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 ||
- fs->super->s_first_data_block >= fs->super->s_blocks_count) {
+ fs->super->s_first_data_block >= ext2fs_blocks_count(fs->super)) {
retval = EXT2_ET_CORRUPT_SUPERBLOCK;
goto cleanup;
}
- fs->group_desc_count = ext2fs_div_ceil(fs->super->s_blocks_count -
- fs->super->s_first_data_block,
- blocks_per_group);
- if (fs->group_desc_count * EXT2_INODES_PER_GROUP(fs->super) !=
- fs->super->s_inodes_count) {
- retval = EXT2_ET_CORRUPT_SUPERBLOCK;
+ 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) !=
+ 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));
retval = ext2fs_get_array(fs->desc_blocks, fs->blocksize,
goto cleanup;
if (!group_block)
group_block = fs->super->s_first_data_block;
+ if (group_block == 0 && fs->blocksize == 1024)
+ group_block = 1; /* Deal with 1024 blocksize && bigalloc */
dest = (char *) fs->group_desc;
groups_per_block = EXT2_DESC_PER_BLOCK(fs->super);
if (fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG)
goto cleanup;
#ifdef WORDS_BIGENDIAN
gdp = (struct ext2_group_desc *) dest;
- for (j=0; j < groups_per_block*first_meta_bg; j++)
- ext2fs_swap_group_desc(gdp++);
+ 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);
+ }
#endif
dest += fs->blocksize*first_meta_bg;
}
for (i=first_meta_bg ; i < fs->desc_blocks; i++) {
- blk = ext2fs_descriptor_block_loc(fs, group_block, i);
+ blk = ext2fs_descriptor_block_loc2(fs, group_block, i);
retval = io_channel_read_blk64(fs->io, blk, 1, dest);
if (retval)
goto cleanup;
#ifdef WORDS_BIGENDIAN
- gdp = (struct ext2_group_desc *) dest;
- for (j=0; j < groups_per_block; j++)
- ext2fs_swap_group_desc(gdp++);
+ for (j=0; j < groups_per_block; j++) {
+ /* The below happens to work... be careful. */
+ gdp = ext2fs_group_desc(fs, fs->group_desc, j);
+ ext2fs_swap_group_desc2(fs, gdp);
+ }
#endif
dest += fs->blocksize;
}
*/
if (superblock > 1 && EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) {
- struct ext2_group_desc *gd;
- for (i = 0, gd = fs->group_desc; i < fs->group_desc_count;
- i++, gd++) {
- gd->bg_flags &= ~EXT2_BG_BLOCK_UNINIT;
- gd->bg_flags &= ~EXT2_BG_INODE_UNINIT;
- gd->bg_itable_unused = 0;
+ dgrp_t group;
+
+ for (group = 0; group < fs->group_desc_count; group++) {
+ ext2fs_bg_flags_clear(fs, group, EXT2_BG_BLOCK_UNINIT);
+ ext2fs_bg_flags_clear(fs, group, EXT2_BG_INODE_UNINIT);
+ ext2fs_bg_itable_unused_set(fs, group, 0);
}
ext2fs_mark_super_dirty(fs);
}
fs->flags &= ~EXT2_FLAG_NOFREE_ON_ERROR;
*ret_fs = fs;
+
+ if ((fs->super->s_feature_incompat & EXT4_FEATURE_INCOMPAT_MMP) &&
+ !(flags & EXT2_FLAG_SKIP_MMP) &&
+ (flags & (EXT2_FLAG_RW | EXT2_FLAG_EXCLUSIVE))) {
+ retval = ext2fs_mmp_start(fs);
+ if (retval) {
+ fs->flags |= EXT2_FLAG_SKIP_MMP; /* just do cleanup */
+ ext2fs_mmp_stop(fs);
+ goto cleanup;
+ }
+ }
+
return 0;
cleanup:
if (flags & EXT2_FLAG_NOFREE_ON_ERROR)
git://git.whamcloud.com / tools / e2fsprogs.git / blobdiff