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);
}
void e2fsck_move_ext3_journal(e2fsck_t ctx)
{
struct ext2_super_block *sb = ctx->fs->super;
struct problem_context pctx;
struct ext2_inode inode;
ext2_filsys fs = ctx->fs;
ext2_ino_t ino;
errcode_t retval;
const char * const * cpp;
int group, mount_flags;
clear_problem_context(&pctx);
/*
* If the filesystem is opened read-only, or there is no
* journal, then do nothing.
*/
if ((ctx->options & E2F_OPT_READONLY) ||
(sb->s_journal_inum == 0) ||
!(sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL))
return;
/*
* Read in the journal inode
*/
if (ext2fs_read_inode(fs, sb->s_journal_inum, &inode) != 0)
return;
/*
* If it's necessary to backup the journal inode, do so.
*/
if ((sb->s_jnl_backup_type == 0) ||
((sb->s_jnl_backup_type == EXT3_JNL_BACKUP_BLOCKS) &&
memcmp(inode.i_block, sb->s_jnl_blocks, EXT2_N_BLOCKS*4))) {
if (fix_problem(ctx, PR_0_BACKUP_JNL, &pctx)) {
memcpy(sb->s_jnl_blocks, inode.i_block,
EXT2_N_BLOCKS*4);
sb->s_jnl_blocks[15] = inode.i_size_high;
sb->s_jnl_blocks[16] = inode.i_size;
sb->s_jnl_backup_type = EXT3_JNL_BACKUP_BLOCKS;
ext2fs_mark_super_dirty(fs);
fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
}
}
/*
* If the journal is already the hidden inode, then do nothing
*/
if (sb->s_journal_inum == EXT2_JOURNAL_INO)
return;
/*
* The journal inode had better have only one link and not be readable.
*/
if (inode.i_links_count != 1)
return;
/*
* If the filesystem is mounted, or we can't tell whether
* or not it's mounted, do nothing.
*/
retval = ext2fs_check_if_mounted(ctx->filesystem_name, &mount_flags);
if (retval || (mount_flags & EXT2_MF_MOUNTED))
return;
/*
* If we can't find the name of the journal inode, then do
* nothing.
*/
for (cpp = journal_names; *cpp; cpp++) {
retval = ext2fs_lookup(fs, EXT2_ROOT_INO, *cpp,
strlen(*cpp), 0, &ino);
if ((retval == 0) && (ino == sb->s_journal_inum))
break;
}
if (*cpp == 0)
return;
/* We need the inode bitmap to be loaded */
retval = ext2fs_read_bitmaps(fs);
if (retval)
return;
pctx.str = *cpp;
if (!fix_problem(ctx, PR_0_MOVE_JOURNAL, &pctx))
return;
/*
* OK, we've done all the checks, let's actually move the
* journal inode. Errors at this point mean we need to force
* an ext2 filesystem check.
*/
if ((retval = ext2fs_unlink(fs, EXT2_ROOT_INO, *cpp, ino, 0)) != 0)
goto err_out;
if ((retval = ext2fs_write_inode(fs, EXT2_JOURNAL_INO, &inode)) != 0)
goto err_out;
sb->s_journal_inum = EXT2_JOURNAL_INO;
ext2fs_mark_super_dirty(fs);
fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
inode.i_links_count = 0;
inode.i_dtime = ctx->now;
if ((retval = ext2fs_write_inode(fs, ino, &inode)) != 0)
goto err_out;
group = ext2fs_group_of_ino(fs, ino);
ext2fs_unmark_inode_bitmap2(fs->inode_map, ino);
ext2fs_mark_ib_dirty(fs);
ext2fs_bg_free_inodes_count_set(fs, group, ext2fs_bg_free_inodes_count(fs, group) + 1);
ext2fs_group_desc_csum_set(fs, group);
fs->super->s_free_inodes_count++;
return;
err_out:
pctx.errcode = retval;
fix_problem(ctx, PR_0_ERR_MOVE_JOURNAL, &pctx);
fs->super->s_state &= ~EXT2_VALID_FS;
ext2fs_mark_super_dirty(fs);
return;
}
static void check_inode_bitmaps(e2fsck_t ctx)
{
ext2_filsys fs = ctx->fs;
ext2_ino_t i;
unsigned int free_inodes = 0;
int group_free = 0;
int dirs_count = 0;
int group = 0;
unsigned int inodes = 0;
ext2_ino_t *free_array;
ext2_ino_t *dir_array;
int actual, bitmap;
errcode_t retval;
struct problem_context pctx;
int problem, save_problem, fixit, had_problem;
int csum_flag;
int skip_group = 0;
int redo_flag = 0;
ext2_ino_t first_free = fs->super->s_inodes_per_group + 1;
clear_problem_context(&pctx);
free_array = (ext2_ino_t *) e2fsck_allocate_memory(ctx,
fs->group_desc_count * sizeof(ext2_ino_t), "free inode count array");
dir_array = (ext2_ino_t *) e2fsck_allocate_memory(ctx,
fs->group_desc_count * sizeof(ext2_ino_t), "directory count array");
if ((1 < ext2fs_get_inode_bitmap_start2(ctx->inode_used_map)) ||
(fs->super->s_inodes_count >
ext2fs_get_inode_bitmap_end2(ctx->inode_used_map))) {
pctx.num = 3;
pctx.blk = 1;
pctx.blk2 = fs->super->s_inodes_count;
pctx.ino = ext2fs_get_inode_bitmap_start2(ctx->inode_used_map);
pctx.ino2 = ext2fs_get_inode_bitmap_end2(ctx->inode_used_map);
fix_problem(ctx, PR_5_BMAP_ENDPOINTS, &pctx);
ctx->flags |= E2F_FLAG_ABORT; /* fatal */
goto errout;
}
if ((1 < ext2fs_get_inode_bitmap_start2(fs->inode_map)) ||
(fs->super->s_inodes_count >
ext2fs_get_inode_bitmap_end2(fs->inode_map))) {
pctx.num = 4;
pctx.blk = 1;
pctx.blk2 = fs->super->s_inodes_count;
pctx.ino = ext2fs_get_inode_bitmap_start2(fs->inode_map);
pctx.ino2 = ext2fs_get_inode_bitmap_end2(fs->inode_map);
fix_problem(ctx, PR_5_BMAP_ENDPOINTS, &pctx);
ctx->flags |= E2F_FLAG_ABORT; /* fatal */
goto errout;
}
csum_flag = EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
EXT4_FEATURE_RO_COMPAT_GDT_CSUM);
redo_counts:
had_problem = 0;
save_problem = 0;
pctx.ino = pctx.ino2 = 0;
if (csum_flag &&
(ext2fs_bg_flags_test(fs, group, EXT2_BG_INODE_UNINIT)))
skip_group++;
/* Protect loop from wrap-around if inodes_count is maxed */
for (i = 1; i <= fs->super->s_inodes_count && i > 0; i++) {
bitmap = 0;
if (skip_group &&
i % fs->super->s_inodes_per_group == 1) {
/*
* Current inode is the first inode
* in the current block group.
*/
if (ext2fs_test_inode_bitmap_range(
ctx->inode_used_map, i,
fs->super->s_inodes_per_group)) {
/*
* When the compared inodes in inodes bitmap
* are 0, count the free inode,
* skip the current block group.
*/
first_free = 1;
inodes = fs->super->s_inodes_per_group - 1;
group_free = inodes;
free_inodes += inodes;
i += inodes;
skip_group = 0;
goto do_counts;
}
}
actual = ext2fs_fast_test_inode_bitmap2(ctx->inode_used_map, i);
if (redo_flag)
bitmap = actual;
else if (!skip_group)
bitmap = ext2fs_fast_test_inode_bitmap2(fs->inode_map, i);
if (!actual == !bitmap)
goto do_counts;
if (!actual && bitmap) {
/*
* Inode wasn't used, but marked in bitmap
*/
problem = PR_5_INODE_UNUSED;
} else /* if (actual && !bitmap) */ {
/*
* Inode used, but not in bitmap
*/
problem = PR_5_INODE_USED;
/* We should never hit this, because it means that
* inodes were marked in use that weren't noticed
* in pass1 or pass 2. It is easier to fix the problem
* than to kill e2fsck and leave the user stuck. */
if (skip_group) {
struct problem_context pctx2;
pctx2.blk = i;
pctx2.group = group;
if (fix_problem(ctx, PR_5_INODE_UNINIT,&pctx2)){
ext2fs_bg_flags_clear(fs, group, EXT2_BG_INODE_UNINIT);
skip_group = 0;
}
}
}
if (pctx.ino == 0) {
pctx.ino = pctx.ino2 = i;
save_problem = problem;
} else {
if ((problem == save_problem) &&
(pctx.ino2 == i-1))
pctx.ino2++;
else {
print_bitmap_problem(ctx, save_problem, &pctx);
pctx.ino = pctx.ino2 = i;
save_problem = problem;
}
}
ctx->flags |= E2F_FLAG_PROG_SUPPRESS;
had_problem++;
/*
* If there a problem we should turn off the discard so we
* do not compromise the filesystem.
*/
ctx->options &= ~E2F_OPT_DISCARD;
do_counts:
inodes++;
if (bitmap) {
if (ext2fs_test_inode_bitmap2(ctx->inode_dir_map, i))
dirs_count++;
if (inodes > first_free) {
e2fsck_discard_inodes(ctx, group, first_free,
inodes - first_free);
first_free = fs->super->s_inodes_per_group + 1;
}
} else {
group_free++;
free_inodes++;
if (first_free > inodes)
first_free = inodes;
}
if ((inodes == fs->super->s_inodes_per_group) ||
(i == fs->super->s_inodes_count)) {
/*
* If the last inode is free, we can discard it as well.
*/
if (!bitmap && inodes >= first_free)
e2fsck_discard_inodes(ctx, group, first_free,
inodes - first_free + 1);
/*
* If discard zeroes data and the group inode table
* was not zeroed yet, set itable as zeroed
*/
if ((ctx->options & E2F_OPT_DISCARD) &&
io_channel_discard_zeroes_data(fs->io) &&
!(ext2fs_bg_flags_test(fs, group,
EXT2_BG_INODE_ZEROED))) {
ext2fs_bg_flags_set(fs, group,
EXT2_BG_INODE_ZEROED);
ext2fs_group_desc_csum_set(fs, group);
}
first_free = fs->super->s_inodes_per_group + 1;
free_array[group] = group_free;
dir_array[group] = dirs_count;
group ++;
inodes = 0;
skip_group = 0;
group_free = 0;
dirs_count = 0;
if (ctx->progress)
if ((ctx->progress)(ctx, 5,
group + fs->group_desc_count,
fs->group_desc_count*2))
goto errout;
if (csum_flag &&
(i != fs->super->s_inodes_count) &&
(ext2fs_bg_flags_test(fs, group, EXT2_BG_INODE_UNINIT)
))
skip_group++;
}
}
if (pctx.ino)
print_bitmap_problem(ctx, save_problem, &pctx);
if (had_problem)
fixit = end_problem_latch(ctx, PR_LATCH_IBITMAP);
else
fixit = -1;
ctx->flags &= ~E2F_FLAG_PROG_SUPPRESS;
if (fixit == 1) {
ext2fs_free_inode_bitmap(fs->inode_map);
retval = ext2fs_copy_bitmap(ctx->inode_used_map,
&fs->inode_map);
if (retval) {
clear_problem_context(&pctx);
fix_problem(ctx, PR_5_COPY_IBITMAP_ERROR, &pctx);
ctx->flags |= E2F_FLAG_ABORT;
goto errout;
}
ext2fs_set_bitmap_padding(fs->inode_map);
ext2fs_mark_ib_dirty(fs);
/* redo counts */
inodes = 0; free_inodes = 0; group_free = 0;
dirs_count = 0; group = 0;
memset(free_array, 0, fs->group_desc_count * sizeof(int));
memset(dir_array, 0, fs->group_desc_count * sizeof(int));
redo_flag++;
goto redo_counts;
} else if (fixit == 0)
ext2fs_unmark_valid(fs);
for (i = 0; i < fs->group_desc_count; i++) {
if (free_array[i] != ext2fs_bg_free_inodes_count(fs, i)) {
pctx.group = i;
pctx.ino = ext2fs_bg_free_inodes_count(fs, i);
pctx.ino2 = free_array[i];
if (fix_problem(ctx, PR_5_FREE_INODE_COUNT_GROUP,
&pctx)) {
ext2fs_bg_free_inodes_count_set(fs, i, free_array[i]);
ext2fs_mark_super_dirty(fs);
} else
ext2fs_unmark_valid(fs);
}
if (dir_array[i] != ext2fs_bg_used_dirs_count(fs, i)) {
pctx.group = i;
pctx.ino = ext2fs_bg_used_dirs_count(fs, i);
pctx.ino2 = dir_array[i];
if (fix_problem(ctx, PR_5_FREE_DIR_COUNT_GROUP,
&pctx)) {
ext2fs_bg_used_dirs_count_set(fs, i, dir_array[i]);
ext2fs_mark_super_dirty(fs);
} else
ext2fs_unmark_valid(fs);
}
}
if (free_inodes != fs->super->s_free_inodes_count) {
pctx.group = -1;
pctx.ino = fs->super->s_free_inodes_count;
pctx.ino2 = free_inodes;
if (fix_problem(ctx, PR_5_FREE_INODE_COUNT, &pctx)) {
fs->super->s_free_inodes_count = free_inodes;
ext2fs_mark_super_dirty(fs);
}
}
errout:
ext2fs_free_mem(&free_array);
ext2fs_free_mem(&dir_array);
}
errcode_t online_resize_fs(ext2_filsys fs, const char *mtpt,
blk64_t *new_size, int flags EXT2FS_ATTR((unused)))
{
#ifdef __linux__
struct ext2_new_group_input input;
struct ext4_new_group_input input64;
struct ext2_super_block *sb = fs->super;
unsigned long new_desc_blocks;
ext2_filsys new_fs;
errcode_t retval;
double percent;
dgrp_t i;
blk_t size;
int fd, overhead;
int use_old_ioctl = 1;
int no_meta_bg_resize = 0;
int no_resize_ioctl = 0;
if (getenv("RESIZE2FS_KERNEL_VERSION")) {
char *version_to_emulate = getenv("RESIZE2FS_KERNEL_VERSION");
int kvers = parse_version_number(version_to_emulate);
if (kvers < VERSION_CODE(3, 7, 0))
no_meta_bg_resize = 1;
if (kvers < VERSION_CODE(3, 3, 0))
no_resize_ioctl = 1;
}
if (ext2fs_has_feature_sparse_super2(fs->super) &&
(access("/sys/fs/ext4/features/sparse_super2", R_OK) != 0)) {
com_err(program_name, 0, _("kernel does not support online "
"resize with sparse_super2"));
exit(1);
}
printf(_("Filesystem at %s is mounted on %s; "
"on-line resizing required\n"), fs->device_name, mtpt);
if (*new_size < ext2fs_blocks_count(sb)) {
com_err(program_name, 0, _("On-line shrinking not supported"));
exit(1);
}
/*
* If the number of descriptor blocks is going to increase,
* the on-line resizing inode must be present.
*/
new_desc_blocks = ext2fs_div_ceil(
ext2fs_div64_ceil(*new_size -
fs->super->s_first_data_block,
EXT2_BLOCKS_PER_GROUP(fs->super)),
EXT2_DESC_PER_BLOCK(fs->super));
printf("old_desc_blocks = %lu, new_desc_blocks = %lu\n",
fs->desc_blocks, new_desc_blocks);
/*
* Do error checking to make sure the resize will be successful.
*/
if ((access("/sys/fs/ext4/features/meta_bg_resize", R_OK) != 0) ||
no_meta_bg_resize) {
if (!ext2fs_has_feature_resize_inode(fs->super) &&
(new_desc_blocks != fs->desc_blocks)) {
com_err(program_name, 0,
_("Filesystem does not support online resizing"));
exit(1);
}
if (ext2fs_has_feature_resize_inode(fs->super) &&
new_desc_blocks > (fs->desc_blocks +
fs->super->s_reserved_gdt_blocks)) {
com_err(program_name, 0,
_("Not enough reserved gdt blocks for resizing"));
exit(1);
}
if ((ext2fs_blocks_count(sb) > MAX_32_NUM) ||
(*new_size > MAX_32_NUM)) {
com_err(program_name, 0,
_("Kernel does not support resizing a file system this large"));
exit(1);
}
}
fd = open(mtpt, O_RDONLY);
if (fd < 0) {
com_err(program_name, errno,
_("while trying to open mountpoint %s"), mtpt);
exit(1);
}
if (no_resize_ioctl) {
printf(_("Old resize interface requested.\n"));
} else if (ioctl(fd, EXT4_IOC_RESIZE_FS, new_size)) {
/*
* If kernel does not support EXT4_IOC_RESIZE_FS, use the
* old online resize. Note that the old approach does not
* handle >32 bit file systems
*
* Sigh, if we are running a 32-bit binary on a 64-bit
* kernel (which happens all the time on the MIPS
* architecture in Debian, but can happen on other CPU
* architectures as well) we will get EINVAL returned
* when an ioctl doesn't exist, at least up to Linux
* 3.1. See compat_sys_ioctl() in fs/compat_ioctl.c
* in the kernel sources. This is probably a kernel
* bug, but work around it here.
*/
if ((errno != ENOTTY) && (errno != EINVAL)) {
if (errno == EPERM)
com_err(program_name, 0,
_("Permission denied to resize filesystem"));
else
com_err(program_name, errno,
_("While checking for on-line resizing "
"support"));
exit(1);
}
} else {
close(fd);
return 0;
}
size = ext2fs_blocks_count(sb);
if (ioctl(fd, EXT2_IOC_GROUP_EXTEND, &size)) {
if (errno == EPERM)
com_err(program_name, 0,
_("Permission denied to resize filesystem"));
else if (errno == ENOTTY)
com_err(program_name, 0,
_("Kernel does not support online resizing"));
else
com_err(program_name, errno,
_("While checking for on-line resizing support"));
exit(1);
}
percent = (ext2fs_r_blocks_count(sb) * 100.0) /
ext2fs_blocks_count(sb);
retval = ext2fs_read_bitmaps(fs);
if (retval) {
close(fd);
return retval;
}
retval = ext2fs_dup_handle(fs, &new_fs);
if (retval) {
close(fd);
return retval;
}
/* The current method of adding one block group at a time to a
* mounted filesystem means it is impossible to accommodate the
* flex_bg allocation method of placing the metadata together
* in a single block group. For now we "fix" this issue by
* using the traditional layout for new block groups, where
* each block group is self-contained and contains its own
* bitmap blocks and inode tables. This means we don't get
* the layout advantages of flex_bg in the new block groups,
* but at least it allows on-line resizing to function.
*/
ext2fs_clear_feature_flex_bg(new_fs->super);
retval = adjust_fs_info(new_fs, fs, 0, *new_size);
if (retval) {
close(fd);
return retval;
}
printf(_("Performing an on-line resize of %s to %llu (%dk) blocks.\n"),
fs->device_name, *new_size, fs->blocksize / 1024);
size = fs->group_desc_count * sb->s_blocks_per_group +
sb->s_first_data_block;
if (size > *new_size)
size = *new_size;
if (ioctl(fd, EXT2_IOC_GROUP_EXTEND, &size)) {
com_err(program_name, errno,
_("While trying to extend the last group"));
exit(1);
}
for (i = fs->group_desc_count;
i < new_fs->group_desc_count; i++) {
overhead = (int) (2 + new_fs->inode_blocks_per_group);
if (ext2fs_bg_has_super(new_fs, new_fs->group_desc_count - 1))
overhead += 1 + new_fs->desc_blocks +
new_fs->super->s_reserved_gdt_blocks;
input.group = i;
input.block_bitmap = ext2fs_block_bitmap_loc(new_fs, i);
input.inode_bitmap = ext2fs_inode_bitmap_loc(new_fs, i);
input.inode_table = ext2fs_inode_table_loc(new_fs, i);
input.blocks_count = ext2fs_group_blocks_count(new_fs, i);
input.reserved_blocks = (blk_t) (percent * input.blocks_count
/ 100.0);
#if 0
printf("new block bitmap is at 0x%04x\n", input.block_bitmap);
printf("new inode bitmap is at 0x%04x\n", input.inode_bitmap);
printf("new inode table is at 0x%04x-0x%04x\n",
input.inode_table,
input.inode_table + new_fs->inode_blocks_per_group-1);
printf("new group has %u blocks\n", input.blocks_count);
printf("new group will reserve %d blocks\n",
input.reserved_blocks);
printf("new group has %d free blocks\n",
ext2fs_bg_free_blocks_count(new_fs, i),
printf("new group has %d free inodes (%d blocks)\n",
ext2fs_bg_free_inodes_count(new_fs, i),
new_fs->inode_blocks_per_group);
printf("Adding group #%d\n", input.group);
#endif
if (use_old_ioctl &&
ioctl(fd, EXT2_IOC_GROUP_ADD, &input) == 0)
continue;
else
use_old_ioctl = 0;
input64.group = input.group;
input64.block_bitmap = input.block_bitmap;
input64.inode_bitmap = input.inode_bitmap;
input64.inode_table = input.inode_table;
input64.blocks_count = input.blocks_count;
input64.reserved_blocks = input.reserved_blocks;
input64.unused = input.unused;
if (ioctl(fd, EXT4_IOC_GROUP_ADD, &input64) < 0) {
com_err(program_name, errno,
_("While trying to add group #%d"),
input.group);
exit(1);
}
}
ext2fs_free(new_fs);
close(fd);
return 0;
#else
printf(_("Filesystem at %s is mounted on %s, and on-line resizing is "
"not supported on this system.\n"), fs->device_name, mtpt);
exit(1);
#endif
}
errcode_t online_resize_fs(ext2_filsys fs, const char *mtpt,
blk64_t *new_size, int flags EXT2FS_ATTR((unused)))
{
#ifdef __linux__
struct ext2_new_group_input input;
struct ext4_new_group_input input64;
struct ext2_super_block *sb = fs->super;
unsigned long new_desc_blocks;
ext2_filsys new_fs;
errcode_t retval;
double percent;
dgrp_t i;
blk64_t size;
int fd, overhead;
int use_old_ioctl = 1;
printf(_("Filesystem at %s is mounted on %s; "
"on-line resizing required\n"), fs->device_name, mtpt);
if (*new_size < ext2fs_blocks_count(sb)) {
com_err(program_name, 0, _("On-line shrinking not supported"));
exit(1);
}
/*
* If the number of descriptor blocks is going to increase,
* the on-line resizing inode must be present.
*/
new_desc_blocks = ext2fs_div_ceil(
ext2fs_div64_ceil(*new_size -
fs->super->s_first_data_block,
EXT2_BLOCKS_PER_GROUP(fs->super)),
EXT2_DESC_PER_BLOCK(fs->super));
printf("old desc_blocks = %lu, new_desc_blocks = %lu\n",
fs->desc_blocks, new_desc_blocks);
if (!(fs->super->s_feature_compat &
EXT2_FEATURE_COMPAT_RESIZE_INODE) &&
new_desc_blocks != fs->desc_blocks) {
com_err(program_name, 0,
_("Filesystem does not support online resizing"));
exit(1);
}
fd = open(mtpt, O_RDONLY);
if (fd < 0) {
com_err(program_name, errno,
_("while trying to open mountpoint %s"), mtpt);
exit(1);
}
size=ext2fs_blocks_count(sb);
if (ioctl(fd, EXT2_IOC_GROUP_EXTEND, &size)) {
if (errno == EPERM)
com_err(program_name, 0,
_("Permission denied to resize filesystem"));
else if (errno == ENOTTY)
com_err(program_name, 0,
_("Kernel does not support online resizing"));
else
com_err(program_name, errno,
_("While checking for on-line resizing support"));
exit(1);
}
percent = (ext2fs_r_blocks_count(sb) * 100.0) /
ext2fs_blocks_count(sb);
retval = ext2fs_read_bitmaps(fs);
if (retval)
return retval;
retval = ext2fs_dup_handle(fs, &new_fs);
if (retval)
return retval;
/* The current method of adding one block group at a time to a
* mounted filesystem means it is impossible to accomodate the
* flex_bg allocation method of placing the metadata together
* in a single block group. For now we "fix" this issue by
* using the traditional layout for new block groups, where
* each block group is self-contained and contains its own
* bitmap blocks and inode tables. This means we don't get
* the layout advantages of flex_bg in the new block groups,
* but at least it allows on-line resizing to function.
*/
new_fs->super->s_feature_incompat &= ~EXT4_FEATURE_INCOMPAT_FLEX_BG;
retval = adjust_fs_info(new_fs, fs, 0, *new_size);
if (retval)
return retval;
printf(_("Performing an on-line resize of %s to %llu (%dk) blocks.\n"),
fs->device_name, *new_size, fs->blocksize / 1024);
size = fs->group_desc_count * sb->s_blocks_per_group +
sb->s_first_data_block;
if (size > *new_size)
size = *new_size;
if (ioctl(fd, EXT2_IOC_GROUP_EXTEND, &size)) {
com_err(program_name, errno,
_("While trying to extend the last group"));
exit(1);
}
for (i = fs->group_desc_count;
i < new_fs->group_desc_count; i++) {
overhead = (int) (2 + new_fs->inode_blocks_per_group);
if (ext2fs_bg_has_super(new_fs, new_fs->group_desc_count - 1))
overhead += 1 + new_fs->desc_blocks +
new_fs->super->s_reserved_gdt_blocks;
input.group = i;
input.block_bitmap = ext2fs_block_bitmap_loc(new_fs, i);
input.inode_bitmap = ext2fs_inode_bitmap_loc(new_fs, i);
input.inode_table = ext2fs_inode_table_loc(new_fs, i);
input.blocks_count = sb->s_blocks_per_group;
if (i == new_fs->group_desc_count-1) {
input.blocks_count = ext2fs_blocks_count(new_fs->super) -
sb->s_first_data_block -
(i * sb->s_blocks_per_group);
}
input.reserved_blocks = (blk_t) (percent * input.blocks_count
/ 100.0);
#if 0
printf("new block bitmap is at 0x%04x\n", input.block_bitmap);
printf("new inode bitmap is at 0x%04x\n", input.inode_bitmap);
printf("new inode table is at 0x%04x-0x%04x\n",
input.inode_table,
input.inode_table + new_fs->inode_blocks_per_group-1);
printf("new group has %u blocks\n", input.blocks_count);
printf("new group will reserve %d blocks\n",
input.reserved_blocks);
printf("new group has %d free blocks\n",
ext2fs_bg_free_blocks_count(new_fs, i),
printf("new group has %d free inodes (%d blocks)\n",
ext2fs_bg_free_inodes_count(new_fs, i),
new_fs->inode_blocks_per_group);
printf("Adding group #%d\n", input.group);
#endif
if (use_old_ioctl &&
ioctl(fd, EXT2_IOC_GROUP_ADD, &input) == 0)
continue;
else
use_old_ioctl = 0;
input64.group = input.group;
input64.block_bitmap = input.block_bitmap;
input64.inode_bitmap = input.inode_bitmap;
input64.inode_table = input.inode_table;
input64.blocks_count = input.blocks_count;
input64.reserved_blocks = input.reserved_blocks;
input64.unused = input.unused;
if (ioctl(fd, EXT4_IOC_GROUP_ADD, &input64) < 0) {
com_err(program_name, errno,
_("While trying to add group #%d"),
input.group);
exit(1);
}
}
ext2fs_free(new_fs);
close(fd);
return 0;
#else
printf(_("Filesystem at %s is mounted on %s, and on-line resizing is "
"not supported on this system.\n"), fs->device_name, mtpt);
exit(1);
#endif
}
