static blk64_t calc_overhead(ext2_filsys fs, blk64_t num)
{
blk64_t e_blocks, e_blocks2, e_blocks3, e_blocks4;
int extents_per_block;
int extents = (num + EXT_INIT_MAX_LEN - 1) / EXT_INIT_MAX_LEN;
if (extents <= 4)
return 0;
/*
* This calculation is due to the fact that we are inefficient
* in how handle extent splits when appending to the end of
* the extent tree. Sigh. We should fix this so that we can
* actually store 340 extents per 4k block, instead of only 170.
*/
extents_per_block = ((fs->blocksize -
sizeof(struct ext3_extent_header)) /
sizeof(struct ext3_extent));
extents_per_block = (extents_per_block/ 2) - 1;
e_blocks = (extents + extents_per_block - 1) / extents_per_block;
e_blocks2 = (e_blocks + extents_per_block - 1) / extents_per_block;
e_blocks3 = (e_blocks2 + extents_per_block - 1) / extents_per_block;
e_blocks4 = (e_blocks3 + extents_per_block - 1) / extents_per_block;
return (e_blocks + e_blocks2 + e_blocks3 + e_blocks4) *
EXT2FS_CLUSTER_RATIO(fs);
}
/*
* Helper function which writes out a directory block.
*/
static int write_dir_block(ext2_filsys fs,
blk64_t *block_nr,
e2_blkcnt_t blockcnt,
blk64_t ref_block EXT2FS_ATTR((unused)),
int ref_offset EXT2FS_ATTR((unused)),
void *priv_data)
{
struct write_dir_struct *wd = (struct write_dir_struct *) priv_data;
blk64_t blk;
char *dir, *buf = 0;
if (*block_nr == 0)
return 0;
if (blockcnt < 0)
return 0;
if (blockcnt < wd->outdir->num)
dir = wd->outdir->buf + (blockcnt * fs->blocksize);
else if (wd->ctx->lost_and_found == wd->dir) {
/* Don't release any extra directory blocks for lost+found */
wd->err = ext2fs_new_dir_block(fs, 0, 0, &buf);
if (wd->err)
return BLOCK_ABORT;
dir = buf;
wd->outdir->num++;
} else {
/* We don't need this block, so release it */
e2fsck_read_bitmaps(wd->ctx);
blk = *block_nr;
/*
* In theory, we only release blocks from the end of the
* directory file, so it's fine to clobber a whole cluster at
* once.
*/
if (blk % EXT2FS_CLUSTER_RATIO(fs) == 0) {
ext2fs_block_alloc_stats2(fs, blk, -1);
wd->cleared++;
}
*block_nr = 0;
return BLOCK_CHANGED;
}
wd->err = ext2fs_write_dir_block4(fs, *block_nr, dir, 0, wd->dir);
if (buf)
ext2fs_free_mem(&buf);
if (wd->err)
return BLOCK_ABORT;
return 0;
}
blk64_t ext2fs_descriptor_block_loc2(ext2_filsys fs, blk64_t group_block,
dgrp_t i)
{
int bg;
int has_super = 0, group_zero_adjust = 0;
blk64_t ret_blk;
/*
* On a bigalloc FS with 1K blocks, block 0 is reserved for non-ext4
* stuff, so adjust for that if we're being asked for group 0.
*/
if (i == 0 && fs->blocksize == 1024 && EXT2FS_CLUSTER_RATIO(fs) > 1)
group_zero_adjust = 1;
if (!ext2fs_has_feature_meta_bg(fs->super) ||
(i < fs->super->s_first_meta_bg))
return group_block + i + 1 + group_zero_adjust;
bg = EXT2_DESC_PER_BLOCK(fs->super) * i;
if (ext2fs_bg_has_super(fs, bg))
has_super = 1;
ret_blk = ext2fs_group_first_block2(fs, bg);
/*
* If group_block is not the normal value, we're trying to use
* the backup group descriptors and superblock --- so use the
* alternate location of the second block group in the
* metablock group. Ideally we should be testing each bg
* descriptor block individually for correctness, but we don't
* have the infrastructure in place to do that.
*/
if (group_block != fs->super->s_first_data_block &&
((ret_blk + has_super + fs->super->s_blocks_per_group) <
ext2fs_blocks_count(fs->super))) {
ret_blk += fs->super->s_blocks_per_group;
/*
* If we're going to jump forward a block group, make sure
* that we adjust has_super to account for the next group's
* backup superblock (or lack thereof).
*/
if (ext2fs_bg_has_super(fs, bg + 1))
has_super = 1;
else
has_super = 0;
}
return ret_blk + has_super + group_zero_adjust;
}
errcode_t ext2fs_iblk_add_blocks(ext2_filsys fs, struct ext2_inode *inode,
blk64_t num_blocks)
{
unsigned long long b = inode->i_blocks;
if (fs->super->s_feature_ro_compat & EXT4_FEATURE_RO_COMPAT_HUGE_FILE)
b += ((long long) inode->osd2.linux2.l_i_blocks_hi) << 32;
if (!(fs->super->s_feature_ro_compat &
EXT4_FEATURE_RO_COMPAT_HUGE_FILE) ||
!(inode->i_flags & EXT4_HUGE_FILE_FL))
num_blocks *= fs->blocksize / 512;
num_blocks *= EXT2FS_CLUSTER_RATIO(fs);
b += num_blocks;
if (fs->super->s_feature_ro_compat & EXT4_FEATURE_RO_COMPAT_HUGE_FILE)
inode->osd2.linux2.l_i_blocks_hi = b >> 32;
else if (b > 0xFFFFFFFF)
/*
* This function reserves the superblock and block group descriptors
* for a given block group. It currently returns the number of free
* blocks assuming that inode table and allocation bitmaps will be in
* the group. This is not necessarily the case when the flex_bg
* feature is enabled, so callers should take care! It was only
* really intended for use by mke2fs, and even there it's not that
* useful. In the future, when we redo this function for 64-bit block
* numbers, we should probably return the number of blocks used by the
* super block and group descriptors instead.
*
* See also the comment for ext2fs_super_and_bgd_loc()
*/
int ext2fs_reserve_super_and_bgd(ext2_filsys fs,
dgrp_t group,
ext2fs_block_bitmap bmap)
{
blk64_t super_blk, old_desc_blk, new_desc_blk;
blk_t used_blks;
int j, old_desc_blocks, num_blocks;
ext2fs_super_and_bgd_loc2(fs, group, &super_blk,
&old_desc_blk, &new_desc_blk, &used_blks);
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 + fs->super->s_reserved_gdt_blocks;
if (super_blk || (group == 0))
ext2fs_mark_block_bitmap2(bmap, super_blk);
if ((group == 0) && (fs->blocksize == 1024) &&
EXT2FS_CLUSTER_RATIO(fs) > 1)
ext2fs_mark_block_bitmap2(bmap, 0);
if (old_desc_blk) {
if (fs->super->s_reserved_gdt_blocks && fs->block_map == bmap)
ext2fs_bg_flags_clear(fs, group, EXT2_BG_BLOCK_UNINIT);
for (j=0; j < old_desc_blocks; j++)
if (old_desc_blk + j < ext2fs_blocks_count(fs->super))
ext2fs_mark_block_bitmap2(bmap,
old_desc_blk + j);
}
if (new_desc_blk)
ext2fs_mark_block_bitmap2(bmap, new_desc_blk);
num_blocks = ext2fs_group_blocks_count(fs, group);
num_blocks -= 2 + fs->inode_blocks_per_group + used_blks;
return num_blocks ;
}
/*
* Helper function which writes out a directory block.
*/
static int write_dir_block(ext2_filsys fs,
blk64_t *block_nr,
e2_blkcnt_t blockcnt,
blk64_t ref_block EXT2FS_ATTR((unused)),
int ref_offset EXT2FS_ATTR((unused)),
void *priv_data)
{
struct write_dir_struct *wd = (struct write_dir_struct *) priv_data;
blk64_t blk;
char *dir;
if (*block_nr == 0)
return 0;
if (blockcnt >= wd->outdir->num) {
e2fsck_read_bitmaps(wd->ctx);
blk = *block_nr;
/*
* In theory, we only release blocks from the end of the
* directory file, so it's fine to clobber a whole cluster at
* once.
*/
if (blk % EXT2FS_CLUSTER_RATIO(fs) == 0) {
ext2fs_unmark_block_bitmap2(wd->ctx->block_found_map,
blk);
ext2fs_block_alloc_stats2(fs, blk, -1);
wd->cleared++;
}
*block_nr = 0;
return BLOCK_CHANGED;
}
if (blockcnt < 0)
return 0;
dir = wd->outdir->buf + (blockcnt * fs->blocksize);
wd->err = ext2fs_write_dir_block3(fs, *block_nr, dir, 0);
if (wd->err)
return BLOCK_ABORT;
return 0;
}
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);
}
errcode_t mk_hugefiles(ext2_filsys fs, const char *device_name)
{
unsigned long i;
ext2_ino_t dir;
errcode_t retval;
blk64_t fs_blocks, part_offset = 0;
unsigned long align;
int d, dsize;
char *t;
if (!get_bool_from_profile(fs_types, "make_hugefiles", 0))
return 0;
if (!EXT2_HAS_INCOMPAT_FEATURE(fs->super,
EXT3_FEATURE_INCOMPAT_EXTENTS))
return EXT2_ET_EXTENT_NOT_SUPPORTED;
uid = get_int_from_profile(fs_types, "hugefiles_uid", 0);
gid = get_int_from_profile(fs_types, "hugefiles_gid", 0);
fs->umask = get_int_from_profile(fs_types, "hugefiles_umask", 077);
num_files = get_int_from_profile(fs_types, "num_hugefiles", 0);
t = get_string_from_profile(fs_types, "hugefiles_slack", "1M");
num_slack = parse_num_blocks2(t, fs->super->s_log_block_size);
free(t);
t = get_string_from_profile(fs_types, "hugefiles_size", "0");
num_blocks = parse_num_blocks2(t, fs->super->s_log_block_size);
free(t);
t = get_string_from_profile(fs_types, "hugefiles_align", "0");
align = parse_num_blocks2(t, fs->super->s_log_block_size);
free(t);
if (get_bool_from_profile(fs_types, "hugefiles_align_disk", 0)) {
part_offset = get_partition_start(device_name) /
(fs->blocksize / 512);
if (part_offset % EXT2FS_CLUSTER_RATIO(fs)) {
fprintf(stderr,
_("Partition offset of %llu (%uk) blocks "
"not compatible with cluster size %u.\n"),
part_offset, fs->blocksize,
EXT2_CLUSTER_SIZE(fs->super));
exit(1);
}
}
num_blocks = round_up_align(num_blocks, align, 0);
zero_hugefile = get_bool_from_profile(fs_types, "zero_hugefiles",
zero_hugefile);
t = get_string_from_profile(fs_types, "hugefiles_dir", "/");
retval = create_directory(fs, t, &dir);
free(t);
if (retval)
return retval;
fn_prefix = get_string_from_profile(fs_types, "hugefiles_name",
"hugefile");
idx_digits = get_int_from_profile(fs_types, "hugefiles_digits", 5);
d = int_log10(num_files) + 1;
if (idx_digits > d)
d = idx_digits;
dsize = strlen(fn_prefix) + d + 16;
fn_buf = malloc(dsize);
if (!fn_buf) {
free(fn_prefix);
return ENOMEM;
}
strcpy(fn_buf, fn_prefix);
fn_numbuf = fn_buf + strlen(fn_prefix);
free(fn_prefix);
fs_blocks = ext2fs_free_blocks_count(fs->super);
if (fs_blocks < num_slack + align)
return ENOSPC;
fs_blocks -= num_slack + align;
if (num_blocks && num_blocks > fs_blocks)
return ENOSPC;
if (num_blocks == 0 && num_files == 0)
num_files = 1;
if (num_files == 0 && num_blocks) {
num_files = fs_blocks / num_blocks;
fs_blocks -= (num_files / 16) + 1;
fs_blocks -= calc_overhead(fs, num_blocks) * num_files;
num_files = fs_blocks / num_blocks;
}
if (num_blocks == 0 && num_files > 1) {
num_blocks = fs_blocks / num_files;
fs_blocks -= (num_files / 16) + 1;
fs_blocks -= calc_overhead(fs, num_blocks) * num_files;
num_blocks = fs_blocks / num_files;
}
num_slack += calc_overhead(fs, num_blocks) * num_files;
num_slack += (num_files / 16) + 1; /* space for dir entries */
goal = get_start_block(fs, num_slack);
goal = round_up_align(goal, align, part_offset);
if ((num_blocks ? num_blocks : fs_blocks) >
(0x80000000UL / fs->blocksize))
fs->super->s_feature_ro_compat |=
EXT2_FEATURE_RO_COMPAT_LARGE_FILE;
if (!quiet) {
if (zero_hugefile && verbose)
printf("%s", _("Huge files will be zero'ed\n"));
printf(_("Creating %lu huge file(s) "), num_files);
if (num_blocks)
printf(_("with %llu blocks each"), num_blocks);
fputs(": ", stdout);
}
if (num_blocks == 0)
num_blocks = ext2fs_blocks_count(fs->super) - goal;
for (i=0; i < num_files; i++) {
ext2_ino_t ino;
retval = mk_hugefile(fs, num_blocks, dir, i, &ino);
if (retval) {
com_err(program_name, retval,
_("while creating huge file %lu"), i);
goto errout;
}
}
if (!quiet)
fputs(_("done\n"), stdout);
errout:
free(fn_buf);
return retval;
}
static errcode_t mk_hugefile(ext2_filsys fs, blk64_t num,
ext2_ino_t dir, unsigned long idx, ext2_ino_t *ino)
{
errcode_t retval;
blk64_t lblk, bend = 0;
__u64 size;
blk64_t left;
blk64_t count = 0;
struct ext2_inode inode;
ext2_extent_handle_t handle;
retval = ext2fs_new_inode(fs, 0, LINUX_S_IFREG, NULL, ino);
if (retval)
return retval;
memset(&inode, 0, sizeof(struct ext2_inode));
inode.i_mode = LINUX_S_IFREG | (0666 & ~fs->umask);
inode.i_links_count = 1;
inode.i_uid = uid & 0xFFFF;
ext2fs_set_i_uid_high(inode, (uid >> 16) & 0xffff);
inode.i_gid = gid & 0xFFFF;
ext2fs_set_i_gid_high(inode, (gid >> 16) & 0xffff);
retval = ext2fs_write_new_inode(fs, *ino, &inode);
if (retval)
return retval;
ext2fs_inode_alloc_stats2(fs, *ino, +1, 0);
retval = ext2fs_extent_open2(fs, *ino, &inode, &handle);
if (retval)
return retval;
/*
* We don't use ext2fs_fallocate() here because hugefiles are
* designed to be physically contiguous (if the block group
* descriptors are configured to be in a single block at the
* beginning of the file system, by using the
* packed_meta_blocks layout), with the extent tree blocks
* allocated near the beginning of the file system.
*/
lblk = 0;
left = num ? num : 1;
while (left) {
blk64_t pblk, end;
blk64_t n = left;
retval = ext2fs_find_first_zero_block_bitmap2(fs->block_map,
goal, ext2fs_blocks_count(fs->super) - 1, &end);
if (retval)
goto errout;
goal = end;
retval = ext2fs_find_first_set_block_bitmap2(fs->block_map, goal,
ext2fs_blocks_count(fs->super) - 1, &bend);
if (retval == ENOENT) {
bend = ext2fs_blocks_count(fs->super);
if (num == 0)
left = 0;
}
if (!num || bend - goal < left)
n = bend - goal;
pblk = goal;
if (num)
left -= n;
goal += n;
count += n;
ext2fs_block_alloc_stats_range(fs, pblk, n, +1);
if (zero_hugefile) {
blk64_t ret_blk;
retval = ext2fs_zero_blocks2(fs, pblk, n,
&ret_blk, NULL);
if (retval)
com_err(program_name, retval,
_("while zeroing block %llu "
"for hugefile"), ret_blk);
}
while (n) {
blk64_t l = n;
struct ext2fs_extent newextent;
if (l > EXT_INIT_MAX_LEN)
l = EXT_INIT_MAX_LEN;
newextent.e_len = l;
newextent.e_pblk = pblk;
newextent.e_lblk = lblk;
newextent.e_flags = 0;
retval = ext2fs_extent_insert(handle,
EXT2_EXTENT_INSERT_AFTER, &newextent);
if (retval)
return retval;
pblk += l;
lblk += l;
n -= l;
}
}
retval = ext2fs_read_inode(fs, *ino, &inode);
if (retval)
goto errout;
retval = ext2fs_iblk_add_blocks(fs, &inode,
count / EXT2FS_CLUSTER_RATIO(fs));
if (retval)
goto errout;
size = (__u64) count * fs->blocksize;
retval = ext2fs_inode_size_set(fs, &inode, size);
if (retval)
goto errout;
retval = ext2fs_write_new_inode(fs, *ino, &inode);
if (retval)
goto errout;
if (idx_digits)
sprintf(fn_numbuf, "%0*lu", idx_digits, idx);
else if (num_files > 1)
sprintf(fn_numbuf, "%lu", idx);
retry:
retval = ext2fs_link(fs, dir, fn_buf, *ino, EXT2_FT_REG_FILE);
if (retval == EXT2_ET_DIR_NO_SPACE) {
retval = ext2fs_expand_dir(fs, dir);
if (retval)
goto errout;
goto retry;
}
if (retval)
goto errout;
errout:
if (handle)
ext2fs_extent_free(handle);
return retval;
}
static void check_block_bitmaps(e2fsck_t ctx)
{
ext2_filsys fs = ctx->fs;
blk64_t i;
unsigned int *free_array;
int group = 0;
unsigned int blocks = 0;
blk64_t free_blocks = 0;
blk64_t first_free = ext2fs_blocks_count(fs->super);
unsigned int group_free = 0;
int actual, bitmap;
struct problem_context pctx;
int problem, save_problem, fixit, had_problem;
errcode_t retval;
int csum_flag;
int skip_group = 0;
int old_desc_blocks = 0;
int count = 0;
int cmp_block = 0;
int redo_flag = 0;
blk64_t super_blk, old_desc_blk, new_desc_blk;
clear_problem_context(&pctx);
free_array = (unsigned int *) e2fsck_allocate_memory(ctx,
fs->group_desc_count * sizeof(unsigned int), "free block count array");
if ((B2C(fs->super->s_first_data_block) <
ext2fs_get_block_bitmap_start2(ctx->block_found_map)) ||
(B2C(ext2fs_blocks_count(fs->super)-1) >
ext2fs_get_block_bitmap_end2(ctx->block_found_map))) {
pctx.num = 1;
pctx.blk = B2C(fs->super->s_first_data_block);
pctx.blk2 = B2C(ext2fs_blocks_count(fs->super) - 1);
pctx.ino = ext2fs_get_block_bitmap_start2(ctx->block_found_map);
pctx.ino2 = ext2fs_get_block_bitmap_end2(ctx->block_found_map);
fix_problem(ctx, PR_5_BMAP_ENDPOINTS, &pctx);
ctx->flags |= E2F_FLAG_ABORT; /* fatal */
goto errout;
}
if ((B2C(fs->super->s_first_data_block) <
ext2fs_get_block_bitmap_start2(fs->block_map)) ||
(B2C(ext2fs_blocks_count(fs->super)-1) >
ext2fs_get_block_bitmap_end2(fs->block_map))) {
pctx.num = 2;
pctx.blk = B2C(fs->super->s_first_data_block);
pctx.blk2 = B2C(ext2fs_blocks_count(fs->super) - 1);
pctx.ino = ext2fs_get_block_bitmap_start2(fs->block_map);
pctx.ino2 = ext2fs_get_block_bitmap_end2(fs->block_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.blk = pctx.blk2 = NO_BLK;
if (csum_flag &&
(ext2fs_bg_flags_test(fs, group, EXT2_BG_BLOCK_UNINIT)))
skip_group++;
for (i = B2C(fs->super->s_first_data_block);
i < ext2fs_blocks_count(fs->super);
i += EXT2FS_CLUSTER_RATIO(fs)) {
actual = ext2fs_fast_test_block_bitmap2(ctx->block_found_map, i);
if (skip_group) {
if ((B2C(i) - B2C(fs->super->s_first_data_block)) %
fs->super->s_clusters_per_group == 0) {
super_blk = 0;
old_desc_blk = 0;
new_desc_blk = 0;
ext2fs_super_and_bgd_loc2(fs, group, &super_blk,
&old_desc_blk, &new_desc_blk, 0);
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 +
fs->super->s_reserved_gdt_blocks;
count = 0;
cmp_block = fs->super->s_clusters_per_group;
if (group == (int)fs->group_desc_count - 1)
cmp_block = EXT2FS_NUM_B2C(fs,
ext2fs_group_blocks_count(fs, group));
}
bitmap = 0;
if (EQ_CLSTR(i, super_blk) ||
(old_desc_blk && old_desc_blocks &&
GE_CLSTR(i, old_desc_blk) &&
LE_CLSTR(i, old_desc_blk + old_desc_blocks-1)) ||
(new_desc_blk && EQ_CLSTR(i, new_desc_blk)) ||
EQ_CLSTR(i, ext2fs_block_bitmap_loc(fs, group)) ||
EQ_CLSTR(i, ext2fs_inode_bitmap_loc(fs, group)) ||
(GE_CLSTR(i, ext2fs_inode_table_loc(fs, group)) &&
LE_CLSTR(i, (ext2fs_inode_table_loc(fs, group) +
fs->inode_blocks_per_group - 1)))) {
bitmap = 1;
actual = (actual != 0);
count++;
cmp_block--;
} else if ((EXT2FS_B2C(fs, i) - count -
EXT2FS_B2C(fs, fs->super->s_first_data_block)) %
fs->super->s_clusters_per_group == 0) {
/*
* When the compare data blocks in block bitmap
* are 0, count the free block,
* skip the current block group.
*/
if (ext2fs_test_block_bitmap_range2(
ctx->block_found_map,
EXT2FS_B2C(fs, i),
cmp_block)) {
/*
* -1 means to skip the current block
* group.
*/
blocks = fs->super->s_clusters_per_group - 1;
group_free = cmp_block;
free_blocks += cmp_block;
/*
* The current block group's last block
* is set to i.
*/
i += EXT2FS_C2B(fs, cmp_block - 1);
bitmap = 1;
goto do_counts;
}
}
} else if (redo_flag)
bitmap = actual;
else
bitmap = ext2fs_fast_test_block_bitmap2(fs->block_map, i);
if (!actual == !bitmap)
goto do_counts;
if (!actual && bitmap) {
/*
* Block not used, but marked in use in the bitmap.
*/
problem = PR_5_BLOCK_UNUSED;
} else {
/*
* Block used, but not marked in use in the bitmap.
*/
problem = PR_5_BLOCK_USED;
if (skip_group) {
struct problem_context pctx2;
pctx2.blk = i;
pctx2.group = group;
if (fix_problem(ctx, PR_5_BLOCK_UNINIT,&pctx2)){
ext2fs_bg_flags_clear(fs, group, EXT2_BG_BLOCK_UNINIT);
skip_group = 0;
}
}
}
if (pctx.blk == NO_BLK) {
pctx.blk = pctx.blk2 = i;
save_problem = problem;
} else {
if ((problem == save_problem) &&
(pctx.blk2 == i-1))
pctx.blk2++;
else {
print_bitmap_problem(ctx, save_problem, &pctx);
pctx.blk = pctx.blk2 = 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:
if (!bitmap) {
group_free++;
free_blocks++;
if (first_free > i)
first_free = i;
} else if (i > first_free) {
e2fsck_discard_blocks(ctx, first_free,
(i - first_free));
first_free = ext2fs_blocks_count(fs->super);
}
blocks ++;
if ((blocks == fs->super->s_clusters_per_group) ||
(EXT2FS_B2C(fs, i) ==
EXT2FS_B2C(fs, ext2fs_blocks_count(fs->super)-1))) {
/*
* If the last block of this group is free, then we can
* discard it as well.
*/
if (!bitmap && i >= first_free)
e2fsck_discard_blocks(ctx, first_free,
(i - first_free) + 1);
first_free = ext2fs_blocks_count(fs->super);
free_array[group] = group_free;
group ++;
blocks = 0;
group_free = 0;
skip_group = 0;
if (ctx->progress)
if ((ctx->progress)(ctx, 5, group,
fs->group_desc_count*2))
goto errout;
if (csum_flag &&
(i != ext2fs_blocks_count(fs->super)-1) &&
ext2fs_bg_flags_test(fs, group,
EXT2_BG_BLOCK_UNINIT))
skip_group++;
}
}
if (pctx.blk != NO_BLK)
print_bitmap_problem(ctx, save_problem, &pctx);
if (had_problem)
fixit = end_problem_latch(ctx, PR_LATCH_BBITMAP);
else
fixit = -1;
ctx->flags &= ~E2F_FLAG_PROG_SUPPRESS;
if (fixit == 1) {
ext2fs_free_block_bitmap(fs->block_map);
retval = ext2fs_copy_bitmap(ctx->block_found_map,
&fs->block_map);
if (retval) {
clear_problem_context(&pctx);
fix_problem(ctx, PR_5_COPY_BBITMAP_ERROR, &pctx);
ctx->flags |= E2F_FLAG_ABORT;
goto errout;
}
ext2fs_set_bitmap_padding(fs->block_map);
ext2fs_mark_bb_dirty(fs);
/* Redo the counts */
blocks = 0; free_blocks = 0; group_free = 0; group = 0;
memset(free_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_blocks_count(fs, i)) {
pctx.group = i;
pctx.blk = ext2fs_bg_free_blocks_count(fs, i);
pctx.blk2 = free_array[i];
if (fix_problem(ctx, PR_5_FREE_BLOCK_COUNT_GROUP,
&pctx)) {
ext2fs_bg_free_blocks_count_set(fs, i, free_array[i]);
ext2fs_mark_super_dirty(fs);
} else
ext2fs_unmark_valid(fs);
}
}
free_blocks = EXT2FS_C2B(fs, free_blocks);
if (free_blocks != ext2fs_free_blocks_count(fs->super)) {
pctx.group = 0;
pctx.blk = ext2fs_free_blocks_count(fs->super);
pctx.blk2 = free_blocks;
if (fix_problem(ctx, PR_5_FREE_BLOCK_COUNT, &pctx)) {
ext2fs_free_blocks_count_set(fs->super, free_blocks);
ext2fs_mark_super_dirty(fs);
}
}
errout:
ext2fs_free_mem(&free_array);
}
static void check_block_bitmaps(e2fsck_t ctx)
{
ext2_filsys fs = ctx->fs;
blk64_t i;
unsigned int *free_array;
dgrp_t g, group = 0;
unsigned int blocks = 0;
blk64_t free_blocks = 0;
blk64_t first_free = ext2fs_blocks_count(fs->super);
unsigned int group_free = 0;
int actual, bitmap;
struct problem_context pctx;
problem_t problem, save_problem;
int fixit, had_problem;
errcode_t retval;
int old_desc_blocks = 0;
int count = 0;
int cmp_block = 0;
int redo_flag = 0;
blk64_t super_blk, old_desc_blk, new_desc_blk;
char *actual_buf, *bitmap_buf;
actual_buf = (char *) e2fsck_allocate_memory(ctx, fs->blocksize,
"actual bitmap buffer");
bitmap_buf = (char *) e2fsck_allocate_memory(ctx, fs->blocksize,
"bitmap block buffer");
clear_problem_context(&pctx);
free_array = (unsigned int *) e2fsck_allocate_memory(ctx,
fs->group_desc_count * sizeof(unsigned int), "free block count array");
if ((B2C(fs->super->s_first_data_block) <
ext2fs_get_block_bitmap_start2(ctx->block_found_map)) ||
(B2C(ext2fs_blocks_count(fs->super)-1) >
ext2fs_get_block_bitmap_end2(ctx->block_found_map))) {
pctx.num = 1;
pctx.blk = B2C(fs->super->s_first_data_block);
pctx.blk2 = B2C(ext2fs_blocks_count(fs->super) - 1);
pctx.ino = ext2fs_get_block_bitmap_start2(ctx->block_found_map);
pctx.ino2 = ext2fs_get_block_bitmap_end2(ctx->block_found_map);
fix_problem(ctx, PR_5_BMAP_ENDPOINTS, &pctx);
ctx->flags |= E2F_FLAG_ABORT; /* fatal */
goto errout;
}
if ((B2C(fs->super->s_first_data_block) <
ext2fs_get_block_bitmap_start2(fs->block_map)) ||
(B2C(ext2fs_blocks_count(fs->super)-1) >
ext2fs_get_block_bitmap_end2(fs->block_map))) {
pctx.num = 2;
pctx.blk = B2C(fs->super->s_first_data_block);
pctx.blk2 = B2C(ext2fs_blocks_count(fs->super) - 1);
pctx.ino = ext2fs_get_block_bitmap_start2(fs->block_map);
pctx.ino2 = ext2fs_get_block_bitmap_end2(fs->block_map);
fix_problem(ctx, PR_5_BMAP_ENDPOINTS, &pctx);
ctx->flags |= E2F_FLAG_ABORT; /* fatal */
goto errout;
}
redo_counts:
had_problem = 0;
save_problem = 0;
pctx.blk = pctx.blk2 = NO_BLK;
for (i = B2C(fs->super->s_first_data_block);
i < ext2fs_blocks_count(fs->super);
i += EXT2FS_CLUSTER_RATIO(fs)) {
int first_block_in_bg = (B2C(i) -
B2C(fs->super->s_first_data_block)) %
fs->super->s_clusters_per_group == 0;
int n, nbytes = fs->super->s_clusters_per_group / 8;
actual = ext2fs_fast_test_block_bitmap2(ctx->block_found_map, i);
/*
* Try to optimize pass5 by extracting a bitmap block
* as expected from what we have on disk, and then
* comparing the two. If they are identical, then
* update the free block counts and go on to the next
* block group. This is much faster than doing the
* individual bit-by-bit comparison. The one downside
* is that this doesn't work if we are asking e2fsck
* to do a discard operation.
*/
if (!first_block_in_bg ||
(group == (int)fs->group_desc_count - 1) ||
(ctx->options & E2F_OPT_DISCARD))
goto no_optimize;
retval = ext2fs_get_block_bitmap_range2(ctx->block_found_map,
B2C(i), fs->super->s_clusters_per_group,
actual_buf);
if (retval)
goto no_optimize;
retval = ext2fs_get_block_bitmap_range2(fs->block_map,
B2C(i), fs->super->s_clusters_per_group,
bitmap_buf);
if (retval)
goto no_optimize;
if (memcmp(actual_buf, bitmap_buf, nbytes) != 0)
goto no_optimize;
n = ext2fs_bitcount(actual_buf, nbytes);
group_free = fs->super->s_clusters_per_group - n;
free_blocks += group_free;
i += EXT2FS_C2B(fs, fs->super->s_clusters_per_group - 1);
goto next_group;
no_optimize:
if (redo_flag)
bitmap = actual;
else
bitmap = ext2fs_fast_test_block_bitmap2(fs->block_map, i);
if (!actual == !bitmap)
goto do_counts;
if (!actual && bitmap) {
/*
* Block not used, but marked in use in the bitmap.
*/
problem = PR_5_BLOCK_UNUSED;
} else {
/*
* Block used, but not marked in use in the bitmap.
*/
problem = PR_5_BLOCK_USED;
if (ext2fs_bg_flags_test(fs, group,
EXT2_BG_BLOCK_UNINIT)) {
struct problem_context pctx2;
pctx2.blk = i;
pctx2.group = group;
if (fix_problem(ctx, PR_5_BLOCK_UNINIT,
&pctx2))
ext2fs_bg_flags_clear(fs, group,
EXT2_BG_BLOCK_UNINIT);
}
}
if (pctx.blk == NO_BLK) {
pctx.blk = pctx.blk2 = i;
save_problem = problem;
} else {
if ((problem == save_problem) &&
(pctx.blk2 == i - EXT2FS_CLUSTER_RATIO(fs)))
pctx.blk2 += EXT2FS_CLUSTER_RATIO(fs);
else {
print_bitmap_problem(ctx, save_problem, &pctx);
pctx.blk = pctx.blk2 = 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:
if (!bitmap) {
group_free++;
free_blocks++;
if (first_free > i)
first_free = i;
} else if (i > first_free) {
e2fsck_discard_blocks(ctx, first_free,
(i - first_free));
first_free = ext2fs_blocks_count(fs->super);
}
blocks ++;
if ((blocks == fs->super->s_clusters_per_group) ||
(EXT2FS_B2C(fs, i) ==
EXT2FS_B2C(fs, ext2fs_blocks_count(fs->super)-1))) {
/*
* If the last block of this group is free, then we can
* discard it as well.
*/
if (!bitmap && i >= first_free)
e2fsck_discard_blocks(ctx, first_free,
(i - first_free) + 1);
next_group:
first_free = ext2fs_blocks_count(fs->super);
free_array[group] = group_free;
group ++;
blocks = 0;
group_free = 0;
if (ctx->progress)
if ((ctx->progress)(ctx, 5, group,
fs->group_desc_count*2))
goto errout;
}
}
if (pctx.blk != NO_BLK)
print_bitmap_problem(ctx, save_problem, &pctx);
if (had_problem)
fixit = end_problem_latch(ctx, PR_LATCH_BBITMAP);
else
fixit = -1;
ctx->flags &= ~E2F_FLAG_PROG_SUPPRESS;
if (fixit == 1) {
ext2fs_free_block_bitmap(fs->block_map);
retval = ext2fs_copy_bitmap(ctx->block_found_map,
&fs->block_map);
if (retval) {
clear_problem_context(&pctx);
fix_problem(ctx, PR_5_COPY_BBITMAP_ERROR, &pctx);
ctx->flags |= E2F_FLAG_ABORT;
goto errout;
}
ext2fs_set_bitmap_padding(fs->block_map);
ext2fs_mark_bb_dirty(fs);
/* Redo the counts */
blocks = 0; free_blocks = 0; group_free = 0; group = 0;
memset(free_array, 0, fs->group_desc_count * sizeof(int));
redo_flag++;
goto redo_counts;
} else if (fixit == 0)
ext2fs_unmark_valid(fs);
for (g = 0; g < fs->group_desc_count; g++) {
if (free_array[g] != ext2fs_bg_free_blocks_count(fs, g)) {
pctx.group = g;
pctx.blk = ext2fs_bg_free_blocks_count(fs, g);
pctx.blk2 = free_array[g];
if (fix_problem(ctx, PR_5_FREE_BLOCK_COUNT_GROUP,
&pctx)) {
ext2fs_bg_free_blocks_count_set(fs, g, free_array[g]);
ext2fs_mark_super_dirty(fs);
} else
ext2fs_unmark_valid(fs);
}
}
free_blocks = EXT2FS_C2B(fs, free_blocks);
if (free_blocks != ext2fs_free_blocks_count(fs->super)) {
pctx.group = 0;
pctx.blk = ext2fs_free_blocks_count(fs->super);
pctx.blk2 = free_blocks;
if (fix_problem(ctx, PR_5_FREE_BLOCK_COUNT, &pctx)) {
ext2fs_free_blocks_count_set(fs->super, free_blocks);
ext2fs_mark_super_dirty(fs);
}
}
errout:
ext2fs_free_mem(&free_array);
ext2fs_free_mem(&actual_buf);
ext2fs_free_mem(&bitmap_buf);
}
errcode_t ext2fs_initialize(const char *name, int flags,
struct ext2_super_block *param,
io_manager manager, ext2_filsys *ret_fs)
{
ext2_filsys fs;
errcode_t retval;
struct ext2_super_block *super;
unsigned int rem;
unsigned int overhead = 0;
unsigned int ipg;
dgrp_t i;
blk64_t free_blocks;
blk_t numblocks;
int rsv_gdt;
int csum_flag;
int bigalloc_flag;
int io_flags;
unsigned reserved_inos;
char *buf = 0;
char c;
double reserved_ratio;
if (!param || !ext2fs_blocks_count(param))
return EXT2_ET_INVALID_ARGUMENT;
retval = ext2fs_get_mem(sizeof(struct struct_ext2_filsys), &fs);
if (retval)
return retval;
memset(fs, 0, sizeof(struct struct_ext2_filsys));
fs->magic = EXT2_ET_MAGIC_EXT2FS_FILSYS;
fs->flags = flags | EXT2_FLAG_RW;
fs->umask = 022;
fs->default_bitmap_type = EXT2FS_BMAP64_RBTREE;
#ifdef WORDS_BIGENDIAN
fs->flags |= EXT2_FLAG_SWAP_BYTES;
#endif
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(name, io_flags, &fs->io);
if (retval)
goto cleanup;
fs->image_io = fs->io;
fs->io->app_data = fs;
retval = ext2fs_get_mem(strlen(name)+1, &fs->device_name);
if (retval)
goto cleanup;
strcpy(fs->device_name, name);
retval = ext2fs_get_mem(SUPERBLOCK_SIZE, &super);
if (retval)
goto cleanup;
fs->super = super;
memset(super, 0, SUPERBLOCK_SIZE);
#define set_field(field, default) (super->field = param->field ? \
param->field : (default))
#define assign_field(field) (super->field = param->field)
super->s_magic = EXT2_SUPER_MAGIC;
super->s_state = EXT2_VALID_FS;
bigalloc_flag = EXT2_HAS_RO_COMPAT_FEATURE(param,
EXT4_FEATURE_RO_COMPAT_BIGALLOC);
assign_field(s_log_block_size);
if (bigalloc_flag) {
set_field(s_log_cluster_size, super->s_log_block_size+4);
if (super->s_log_block_size > super->s_log_cluster_size) {
retval = EXT2_ET_INVALID_ARGUMENT;
goto cleanup;
}
} else
super->s_log_cluster_size = super->s_log_block_size;
set_field(s_first_data_block, super->s_log_cluster_size ? 0 : 1);
set_field(s_max_mnt_count, 0);
set_field(s_errors, EXT2_ERRORS_DEFAULT);
set_field(s_feature_compat, 0);
set_field(s_feature_incompat, 0);
set_field(s_feature_ro_compat, 0);
set_field(s_default_mount_opts, 0);
set_field(s_first_meta_bg, 0);
set_field(s_raid_stride, 0); /* default stride size: 0 */
set_field(s_raid_stripe_width, 0); /* default stripe width: 0 */
set_field(s_log_groups_per_flex, 0);
set_field(s_flags, 0);
assign_field(s_backup_bgs[0]);
assign_field(s_backup_bgs[1]);
if (super->s_feature_incompat & ~EXT2_LIB_FEATURE_INCOMPAT_SUPP) {
retval = EXT2_ET_UNSUPP_FEATURE;
goto cleanup;
}
if (super->s_feature_ro_compat & ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP) {
retval = EXT2_ET_RO_UNSUPP_FEATURE;
goto cleanup;
}
set_field(s_rev_level, EXT2_GOOD_OLD_REV);
if (super->s_rev_level >= EXT2_DYNAMIC_REV) {
set_field(s_first_ino, EXT2_GOOD_OLD_FIRST_INO);
set_field(s_inode_size, EXT2_GOOD_OLD_INODE_SIZE);
if (super->s_inode_size >= sizeof(struct ext2_inode_large)) {
int extra_isize = sizeof(struct ext2_inode_large) -
EXT2_GOOD_OLD_INODE_SIZE;
set_field(s_min_extra_isize, extra_isize);
set_field(s_want_extra_isize, extra_isize);
}
} else {
super->s_first_ino = EXT2_GOOD_OLD_FIRST_INO;
super->s_inode_size = EXT2_GOOD_OLD_INODE_SIZE;
}
set_field(s_checkinterval, 0);
super->s_mkfs_time = super->s_lastcheck = fs->now ? fs->now : time(NULL);
super->s_creator_os = CREATOR_OS;
fs->fragsize = fs->blocksize = EXT2_BLOCK_SIZE(super);
fs->cluster_ratio_bits = super->s_log_cluster_size -
super->s_log_block_size;
if (bigalloc_flag) {
unsigned long long bpg;
if (param->s_blocks_per_group &&
param->s_clusters_per_group &&
((param->s_clusters_per_group * EXT2FS_CLUSTER_RATIO(fs)) !=
param->s_blocks_per_group)) {
retval = EXT2_ET_INVALID_ARGUMENT;
goto cleanup;
}
if (param->s_clusters_per_group)
assign_field(s_clusters_per_group);
else if (param->s_blocks_per_group)
super->s_clusters_per_group =
param->s_blocks_per_group /
EXT2FS_CLUSTER_RATIO(fs);
else if (super->s_log_cluster_size + 15 < 32)
super->s_clusters_per_group = fs->blocksize * 8;
else
super->s_clusters_per_group = (fs->blocksize - 1) * 8;
if (super->s_clusters_per_group > EXT2_MAX_CLUSTERS_PER_GROUP(super))
super->s_clusters_per_group = EXT2_MAX_CLUSTERS_PER_GROUP(super);
bpg = EXT2FS_C2B(fs,
(unsigned long long) super->s_clusters_per_group);
if (bpg >= (((unsigned long long) 1) << 32)) {
retval = EXT2_ET_INVALID_ARGUMENT;
goto cleanup;
}
super->s_blocks_per_group = bpg;
} else {
set_field(s_blocks_per_group, fs->blocksize * 8);
if (super->s_blocks_per_group > EXT2_MAX_BLOCKS_PER_GROUP(super))
super->s_blocks_per_group = EXT2_MAX_BLOCKS_PER_GROUP(super);
super->s_clusters_per_group = super->s_blocks_per_group;
}
ext2fs_blocks_count_set(super, ext2fs_blocks_count(param) &
~((blk64_t) EXT2FS_CLUSTER_MASK(fs)));
ext2fs_r_blocks_count_set(super, ext2fs_r_blocks_count(param));
if (ext2fs_r_blocks_count(super) >= ext2fs_blocks_count(param)) {
retval = EXT2_ET_INVALID_ARGUMENT;
goto cleanup;
}
set_field(s_mmp_update_interval, 0);
/*
* If we're creating an external journal device, we don't need
* to bother with the rest.
*/
if (super->s_feature_incompat & EXT3_FEATURE_INCOMPAT_JOURNAL_DEV) {
fs->group_desc_count = 0;
ext2fs_mark_super_dirty(fs);
*ret_fs = fs;
return 0;
}
retry:
fs->group_desc_count = (dgrp_t) ext2fs_div64_ceil(
ext2fs_blocks_count(super) - super->s_first_data_block,
EXT2_BLOCKS_PER_GROUP(super));
if (fs->group_desc_count == 0) {
retval = EXT2_ET_TOOSMALL;
goto cleanup;
}
set_field(s_desc_size,
super->s_feature_incompat & EXT4_FEATURE_INCOMPAT_64BIT ?
EXT2_MIN_DESC_SIZE_64BIT : 0);
fs->desc_blocks = ext2fs_div_ceil(fs->group_desc_count,
EXT2_DESC_PER_BLOCK(super));
i = fs->blocksize >= 4096 ? 1 : 4096 / fs->blocksize;
if (super->s_feature_incompat & EXT4_FEATURE_INCOMPAT_64BIT &&
(ext2fs_blocks_count(super) / i) > (1ULL << 32))
set_field(s_inodes_count, ~0U);
else
set_field(s_inodes_count, ext2fs_blocks_count(super) / i);
/*
* Make sure we have at least EXT2_FIRST_INO + 1 inodes, so
* that we have enough inodes for the filesystem(!)
*/
if (super->s_inodes_count < EXT2_FIRST_INODE(super)+1)
super->s_inodes_count = EXT2_FIRST_INODE(super)+1;
/*
* There should be at least as many inodes as the user
* requested. Figure out how many inodes per group that
* should be. But make sure that we don't allocate more than
* one bitmap's worth of inodes each group.
*/
ipg = ext2fs_div_ceil(super->s_inodes_count, fs->group_desc_count);
if (ipg > fs->blocksize * 8) {
if (!bigalloc_flag && super->s_blocks_per_group >= 256) {
/* Try again with slightly different parameters */
super->s_blocks_per_group -= 8;
ext2fs_blocks_count_set(super,
ext2fs_blocks_count(param));
super->s_clusters_per_group = super->s_blocks_per_group;
goto retry;
} else {
retval = EXT2_ET_TOO_MANY_INODES;
goto cleanup;
}
}
if (ipg > (unsigned) EXT2_MAX_INODES_PER_GROUP(super))
ipg = EXT2_MAX_INODES_PER_GROUP(super);
ipg_retry:
super->s_inodes_per_group = ipg;
/*
* Make sure the number of inodes per group completely fills
* the inode table blocks in the descriptor. If not, add some
* additional inodes/group. Waste not, want not...
*/
fs->inode_blocks_per_group = (((super->s_inodes_per_group *
EXT2_INODE_SIZE(super)) +
EXT2_BLOCK_SIZE(super) - 1) /
EXT2_BLOCK_SIZE(super));
super->s_inodes_per_group = ((fs->inode_blocks_per_group *
EXT2_BLOCK_SIZE(super)) /
EXT2_INODE_SIZE(super));
/*
* Finally, make sure the number of inodes per group is a
* multiple of 8. This is needed to simplify the bitmap
* splicing code.
*/
if (super->s_inodes_per_group < 8)
super->s_inodes_per_group = 8;
super->s_inodes_per_group &= ~7;
fs->inode_blocks_per_group = (((super->s_inodes_per_group *
EXT2_INODE_SIZE(super)) +
EXT2_BLOCK_SIZE(super) - 1) /
EXT2_BLOCK_SIZE(super));
/*
* adjust inode count to reflect the adjusted inodes_per_group
*/
if ((__u64)super->s_inodes_per_group * fs->group_desc_count > ~0U) {
ipg--;
goto ipg_retry;
}
super->s_inodes_count = super->s_inodes_per_group *
fs->group_desc_count;
super->s_free_inodes_count = super->s_inodes_count;
/*
* check the number of reserved group descriptor table blocks
*/
if (super->s_feature_compat & EXT2_FEATURE_COMPAT_RESIZE_INODE)
rsv_gdt = calc_reserved_gdt_blocks(fs);
else
rsv_gdt = 0;
set_field(s_reserved_gdt_blocks, rsv_gdt);
if (super->s_reserved_gdt_blocks > EXT2_ADDR_PER_BLOCK(super)) {
retval = EXT2_ET_RES_GDT_BLOCKS;
goto cleanup;
}
/*
* Calculate the maximum number of bookkeeping blocks per
* group. It includes the superblock, the block group
* descriptors, the block bitmap, the inode bitmap, the inode
* table, and the reserved gdt blocks.
*/
overhead = (int) (3 + fs->inode_blocks_per_group +
fs->desc_blocks + super->s_reserved_gdt_blocks);
/* This can only happen if the user requested too many inodes */
if (overhead > super->s_blocks_per_group) {
retval = EXT2_ET_TOO_MANY_INODES;
goto cleanup;
}
/*
* See if the last group is big enough to support the
* necessary data structures. If not, we need to get rid of
* it. We need to recalculate the overhead for the last block
* group, since it might or might not have a superblock
* backup.
*/
overhead = (int) (2 + fs->inode_blocks_per_group);
if (ext2fs_bg_has_super(fs, fs->group_desc_count - 1))
overhead += 1 + fs->desc_blocks + super->s_reserved_gdt_blocks;
rem = ((ext2fs_blocks_count(super) - super->s_first_data_block) %
super->s_blocks_per_group);
if ((fs->group_desc_count == 1) && rem && (rem < overhead)) {
retval = EXT2_ET_TOOSMALL;
goto cleanup;
}
if (rem && (rem < overhead+50)) {
ext2fs_blocks_count_set(super, ext2fs_blocks_count(super) -
rem);
/*
* If blocks count is changed, we need to recalculate
* reserved blocks count not to exceed 50%.
*/
reserved_ratio = 100.0 * ext2fs_r_blocks_count(param) /
ext2fs_blocks_count(param);
ext2fs_r_blocks_count_set(super, reserved_ratio *
ext2fs_blocks_count(super) / 100.0);
goto retry;
}
/*
* At this point we know how big the filesystem will be. So
* we can do any and all allocations that depend on the block
* count.
*/
/* Set up the locations of the backup superblocks */
if (super->s_feature_compat & EXT4_FEATURE_COMPAT_SPARSE_SUPER2) {
if (super->s_backup_bgs[0] >= fs->group_desc_count)
super->s_backup_bgs[0] = fs->group_desc_count - 1;
if (super->s_backup_bgs[1] >= fs->group_desc_count)
super->s_backup_bgs[1] = fs->group_desc_count - 1;
if (super->s_backup_bgs[0] == super->s_backup_bgs[1])
super->s_backup_bgs[1] = 0;
if (super->s_backup_bgs[0] > super->s_backup_bgs[1]) {
__u32 t = super->s_backup_bgs[0];
super->s_backup_bgs[0] = super->s_backup_bgs[1];
super->s_backup_bgs[1] = t;
}
}
retval = ext2fs_get_mem(strlen(fs->device_name) + 80, &buf);
if (retval)
goto cleanup;
strcpy(buf, "block bitmap for ");
strcat(buf, fs->device_name);
retval = ext2fs_allocate_subcluster_bitmap(fs, buf, &fs->block_map);
if (retval)
goto cleanup;
strcpy(buf, "inode bitmap for ");
strcat(buf, fs->device_name);
retval = ext2fs_allocate_inode_bitmap(fs, buf, &fs->inode_map);
if (retval)
goto cleanup;
ext2fs_free_mem(&buf);
retval = ext2fs_get_array(fs->desc_blocks, fs->blocksize,
&fs->group_desc);
if (retval)
goto cleanup;
memset(fs->group_desc, 0, (size_t) fs->desc_blocks * fs->blocksize);
/*
* Reserve the superblock and group descriptors for each
* group, and fill in the correct group statistics for group.
* Note that although the block bitmap, inode bitmap, and
* inode table have not been allocated (and in fact won't be
* by this routine), they are accounted for nevertheless.
*
* If FLEX_BG meta-data grouping is used, only account for the
* superblock and group descriptors (the inode tables and
* bitmaps will be accounted for when allocated).
*/
free_blocks = 0;
csum_flag = ext2fs_has_group_desc_csum(fs);
reserved_inos = super->s_first_ino;
for (i = 0; i < fs->group_desc_count; i++) {
/*
* Don't set the BLOCK_UNINIT group for the last group
* because the block bitmap needs to be padded.
*/
if (csum_flag) {
if (i != fs->group_desc_count - 1)
ext2fs_bg_flags_set(fs, i,
EXT2_BG_BLOCK_UNINIT);
ext2fs_bg_flags_set(fs, i, EXT2_BG_INODE_UNINIT);
numblocks = super->s_inodes_per_group;
if (reserved_inos) {
if (numblocks > reserved_inos) {
numblocks -= reserved_inos;
reserved_inos = 0;
} else {
reserved_inos -= numblocks;
numblocks = 0;
}
}
ext2fs_bg_itable_unused_set(fs, i, numblocks);
}
numblocks = ext2fs_reserve_super_and_bgd(fs, i, fs->block_map);
if (fs->super->s_log_groups_per_flex)
numblocks += 2 + fs->inode_blocks_per_group;
free_blocks += numblocks;
ext2fs_bg_free_blocks_count_set(fs, i, numblocks);
ext2fs_bg_free_inodes_count_set(fs, i, fs->super->s_inodes_per_group);
ext2fs_bg_used_dirs_count_set(fs, i, 0);
ext2fs_group_desc_csum_set(fs, i);
}
free_blocks &= ~EXT2FS_CLUSTER_MASK(fs);
ext2fs_free_blocks_count_set(super, free_blocks);
c = (char) 255;
if (((int) c) == -1) {
super->s_flags |= EXT2_FLAGS_SIGNED_HASH;
} else {
super->s_flags |= EXT2_FLAGS_UNSIGNED_HASH;
}
ext2fs_mark_super_dirty(fs);
ext2fs_mark_bb_dirty(fs);
ext2fs_mark_ib_dirty(fs);
io_channel_set_blksize(fs->io, fs->blocksize);
*ret_fs = fs;
return 0;
cleanup:
free(buf);
ext2fs_free(fs);
return retval;
}
/* Helper function for remove_journal_inode */
static int release_blocks_proc(ext2_filsys fs, blk64_t *blocknr,
e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
blk64_t ref_block EXT2FS_ATTR((unused)),
int ref_offset EXT2FS_ATTR((unused)),
void *private EXT2FS_ATTR((unused)))
{
blk64_t block;
int group;
block = *blocknr;
ext2fs_unmark_block_bitmap2(fs->block_map, block);
group = ext2fs_group_of_blk2(fs, block);
ext2fs_bg_free_blocks_count_set(fs, group, ext2fs_bg_free_blocks_count(fs, group) + 1);
ext2fs_group_desc_csum_set(fs, group);
ext2fs_free_blocks_count_add(fs->super, EXT2FS_CLUSTER_RATIO(fs));
return 0;
}
/*
* Remove the journal inode from the filesystem
*/
static void remove_journal_inode(ext2_filsys fs)
{
struct ext2_inode inode;
errcode_t retval;
ino_t ino = fs->super->s_journal_inum;
retval = ext2fs_read_inode(fs, ino, &inode);
if (retval) {
com_err(program_name, retval,
