static void list_desc (ext2_filsys fs)
{
unsigned long i;
blk64_t first_block, last_block;
blk64_t super_blk, old_desc_blk, new_desc_blk;
char *block_bitmap=NULL, *inode_bitmap=NULL;
const char *units = _("blocks");
int inode_blocks_per_group, old_desc_blocks, reserved_gdt;
int block_nbytes, inode_nbytes;
int has_super;
blk64_t blk_itr = EXT2FS_B2C(fs, fs->super->s_first_data_block);
ext2_ino_t ino_itr = 1;
errcode_t retval;
if (EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
EXT4_FEATURE_RO_COMPAT_BIGALLOC))
units = _("clusters");
block_nbytes = EXT2_CLUSTERS_PER_GROUP(fs->super) / 8;
inode_nbytes = EXT2_INODES_PER_GROUP(fs->super) / 8;
if (fs->block_map)
block_bitmap = malloc(block_nbytes);
if (fs->inode_map)
inode_bitmap = malloc(inode_nbytes);
inode_blocks_per_group = ((fs->super->s_inodes_per_group *
EXT2_INODE_SIZE(fs->super)) +
EXT2_BLOCK_SIZE(fs->super) - 1) /
EXT2_BLOCK_SIZE(fs->super);
reserved_gdt = fs->super->s_reserved_gdt_blocks;
fputc('\n', stdout);
first_block = fs->super->s_first_data_block;
if (fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG)
old_desc_blocks = fs->super->s_first_meta_bg;
else
old_desc_blocks = fs->desc_blocks;
for (i = 0; i < fs->group_desc_count; i++) {
first_block = ext2fs_group_first_block2(fs, i);
last_block = ext2fs_group_last_block2(fs, i);
ext2fs_super_and_bgd_loc2(fs, i, &super_blk,
&old_desc_blk, &new_desc_blk, 0);
printf (_("Group %lu: (Blocks "), i);
print_range(first_block, last_block);
fputs(")", stdout);
print_bg_opts(fs, i);
if (ext2fs_has_group_desc_csum(fs)) {
unsigned csum = ext2fs_bg_checksum(fs, i);
unsigned exp_csum = ext2fs_group_desc_csum(fs, i);
printf(_(" Checksum 0x%04x"), csum);
if (csum != exp_csum)
printf(_(" (EXPECTED 0x%04x)"), exp_csum);
printf(_(", unused inodes %u\n"),
ext2fs_bg_itable_unused(fs, i));
}
has_super = ((i==0) || super_blk);
if (has_super) {
printf (_(" %s superblock at "),
i == 0 ? _("Primary") : _("Backup"));
print_number(super_blk);
}
if (old_desc_blk) {
printf("%s", _(", Group descriptors at "));
print_range(old_desc_blk,
old_desc_blk + old_desc_blocks - 1);
if (reserved_gdt) {
printf("%s", _("\n Reserved GDT blocks at "));
print_range(old_desc_blk + old_desc_blocks,
old_desc_blk + old_desc_blocks +
reserved_gdt - 1);
}
} else if (new_desc_blk) {
fputc(has_super ? ',' : ' ', stdout);
printf("%s", _(" Group descriptor at "));
print_number(new_desc_blk);
has_super++;
}
if (has_super)
fputc('\n', stdout);
fputs(_(" Block bitmap at "), stdout);
print_number(ext2fs_block_bitmap_loc(fs, i));
print_bg_rel_offset(fs, ext2fs_block_bitmap_loc(fs, i), 0,
first_block, last_block);
if (fs->super->s_feature_ro_compat &
EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)
printf(_(", csum 0x%08x"),
ext2fs_block_bitmap_checksum(fs, i));
fputs(_(", Inode bitmap at "), stdout);
print_number(ext2fs_inode_bitmap_loc(fs, i));
print_bg_rel_offset(fs, ext2fs_inode_bitmap_loc(fs, i), 0,
first_block, last_block);
if (fs->super->s_feature_ro_compat &
EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)
printf(_(", csum 0x%08x"),
ext2fs_inode_bitmap_checksum(fs, i));
fputs(_("\n Inode table at "), stdout);
print_range(ext2fs_inode_table_loc(fs, i),
ext2fs_inode_table_loc(fs, i) +
inode_blocks_per_group - 1);
print_bg_rel_offset(fs, ext2fs_inode_table_loc(fs, i), 1,
first_block, last_block);
printf (_("\n %u free %s, %u free inodes, "
"%u directories%s"),
ext2fs_bg_free_blocks_count(fs, i), units,
ext2fs_bg_free_inodes_count(fs, i),
ext2fs_bg_used_dirs_count(fs, i),
ext2fs_bg_itable_unused(fs, i) ? "" : "\n");
if (ext2fs_bg_itable_unused(fs, i))
printf (_(", %u unused inodes\n"),
ext2fs_bg_itable_unused(fs, i));
if (block_bitmap) {
fputs(_(" Free blocks: "), stdout);
retval = ext2fs_get_block_bitmap_range2(fs->block_map,
blk_itr, block_nbytes << 3, block_bitmap);
if (retval)
com_err("list_desc", retval,
"while reading block bitmap");
else
print_free(i, block_bitmap,
fs->super->s_clusters_per_group,
fs->super->s_first_data_block,
EXT2FS_CLUSTER_RATIO(fs));
fputc('\n', stdout);
blk_itr += fs->super->s_clusters_per_group;
}
if (inode_bitmap) {
fputs(_(" Free inodes: "), stdout);
retval = ext2fs_get_inode_bitmap_range2(fs->inode_map,
ino_itr, inode_nbytes << 3, inode_bitmap);
if (retval)
com_err("list_desc", retval,
"while reading inode bitmap");
else
print_free(i, inode_bitmap,
fs->super->s_inodes_per_group,
1, 1);
fputc('\n', stdout);
ino_itr += fs->super->s_inodes_per_group;
}
}
if (block_bitmap)
free(block_bitmap);
if (inode_bitmap)
free(inode_bitmap);
}
static errcode_t write_bitmaps(ext2_filsys fs, int do_inode, int do_block)
{
dgrp_t i;
unsigned int j;
int block_nbytes, inode_nbytes;
unsigned int nbits;
errcode_t retval;
char *block_buf = NULL, *inode_buf = NULL;
int csum_flag = 0;
blk64_t blk;
blk64_t blk_itr = EXT2FS_B2C(fs, fs->super->s_first_data_block);
ext2_ino_t ino_itr = 1;
EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
if (!(fs->flags & EXT2_FLAG_RW))
return EXT2_ET_RO_FILSYS;
if (EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
EXT4_FEATURE_RO_COMPAT_GDT_CSUM))
csum_flag = 1;
inode_nbytes = block_nbytes = 0;
if (do_block) {
block_nbytes = EXT2_CLUSTERS_PER_GROUP(fs->super) / 8;
retval = io_channel_alloc_buf(fs->io, 0, &block_buf);
if (retval)
goto errout;
memset(block_buf, 0xff, fs->blocksize);
}
if (do_inode) {
inode_nbytes = (size_t)
((EXT2_INODES_PER_GROUP(fs->super)+7) / 8);
retval = io_channel_alloc_buf(fs->io, 0, &inode_buf);
if (retval)
goto errout;
memset(inode_buf, 0xff, fs->blocksize);
}
for (i = 0; i < fs->group_desc_count; i++) {
if (!do_block)
goto skip_block_bitmap;
if (csum_flag && ext2fs_bg_flags_test(fs, i, EXT2_BG_BLOCK_UNINIT)
)
goto skip_this_block_bitmap;
retval = ext2fs_get_block_bitmap_range2(fs->block_map,
blk_itr, block_nbytes << 3, block_buf);
if (retval)
goto errout;
if (i == fs->group_desc_count - 1) {
/* Force bitmap padding for the last group */
nbits = EXT2FS_NUM_B2C(fs,
((ext2fs_blocks_count(fs->super)
- (__u64) fs->super->s_first_data_block)
% (__u64) EXT2_BLOCKS_PER_GROUP(fs->super)));
if (nbits)
for (j = nbits; j < fs->blocksize * 8; j++)
ext2fs_set_bit(j, block_buf);
}
blk = ext2fs_block_bitmap_loc(fs, i);
if (blk) {
retval = io_channel_write_blk64(fs->io, blk, 1,
block_buf);
if (retval) {
retval = EXT2_ET_BLOCK_BITMAP_WRITE;
goto errout;
}
}
skip_this_block_bitmap:
blk_itr += block_nbytes << 3;
skip_block_bitmap:
if (!do_inode)
continue;
if (csum_flag && ext2fs_bg_flags_test(fs, i, EXT2_BG_INODE_UNINIT)
)
goto skip_this_inode_bitmap;
retval = ext2fs_get_inode_bitmap_range2(fs->inode_map,
ino_itr, inode_nbytes << 3, inode_buf);
if (retval)
goto errout;
blk = ext2fs_inode_bitmap_loc(fs, i);
if (blk) {
retval = io_channel_write_blk64(fs->io, blk, 1,
inode_buf);
if (retval) {
retval = EXT2_ET_INODE_BITMAP_WRITE;
goto errout;
}
}
skip_this_inode_bitmap:
ino_itr += inode_nbytes << 3;
}
if (do_block) {
fs->flags &= ~EXT2_FLAG_BB_DIRTY;
ext2fs_free_mem(&block_buf);
}
if (do_inode) {
fs->flags &= ~EXT2_FLAG_IB_DIRTY;
ext2fs_free_mem(&inode_buf);
}
return 0;
errout:
if (inode_buf)
ext2fs_free_mem(&inode_buf);
if (block_buf)
ext2fs_free_mem(&block_buf);
return retval;
}
