Add support for new compat feature "sparse_super2"
In practice, it is **extremely** rare for users to try to use more
than the first backup superblock located at the beginning of block
group #1. (i.e., at block number 32768 for file systems with a 4k
block size). This new compat feature restricts the backup superblock
to block group #1 and the last block group in the file system.
Aside from reducing the overhead of the file system by a small number
of blocks, by eliminating the rest of the backup superblocks, it
allows us to have a much more flexible metadata layout. For example,
we can force all of the allocation bitmaps and inode table blocks to
the beginning of the disk, which allows most of the disk to be
exclusively used for contiguous data blocks.
This simplifies taking advantage of certain HDD specific features,
such as Shingled Magnetic Recording (aka Shingled Drives), and the
TCG's OPAL Storage Specification where having a simple mapping between
LBA block ranges and the data blocks used by the file system can make
life much simpler.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
diff --git a/debugfs/set_fields.c b/debugfs/set_fields.c
index 9c3b000..ffbda74 100644
--- a/debugfs/set_fields.c
+++ b/debugfs/set_fields.c
@@ -150,6 +150,8 @@
{ "usr_quota_inum", &set_sb.s_usr_quota_inum, NULL, 4, parse_uint },
{ "grp_quota_inum", &set_sb.s_grp_quota_inum, NULL, 4, parse_uint },
{ "overhead_blocks", &set_sb.s_overhead_blocks, NULL, 4, parse_uint },
+ { "backup_bgs", &set_sb.s_backup_bgs[0], NULL, 4, parse_uint,
+ FLAG_ARRAY, 2 },
{ "checksum", &set_sb.s_checksum, NULL, 4, parse_uint },
{ 0, 0, 0, 0 }
};
diff --git a/lib/e2p/feature.c b/lib/e2p/feature.c
index 9691263..1d3e689 100644
--- a/lib/e2p/feature.c
+++ b/lib/e2p/feature.c
@@ -43,6 +43,8 @@
"lazy_bg" },
{ E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_EXCLUDE_BITMAP,
"snapshot_bitmap" },
+ { E2P_FEATURE_COMPAT, EXT4_FEATURE_COMPAT_SPARSE_SUPER2,
+ "sparse_super2" },
{ E2P_FEATURE_RO_INCOMPAT, EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER,
"sparse_super" },
diff --git a/lib/e2p/ls.c b/lib/e2p/ls.c
index 5b3d3c8..6f741c0 100644
--- a/lib/e2p/ls.c
+++ b/lib/e2p/ls.c
@@ -368,6 +368,14 @@
fprintf(f, "type %u\n", sb->s_jnl_backup_type);
}
}
+ if (sb->s_backup_bgs[0] || sb->s_backup_bgs[1]) {
+ fprintf(f, "Backup block groups: ");
+ if (sb->s_backup_bgs[0])
+ fprintf(f, "%u ", sb->s_backup_bgs[0]);
+ if (sb->s_backup_bgs[1])
+ fprintf(f, "%u ", sb->s_backup_bgs[1]);
+ fputc('\n', f);
+ }
if (sb->s_snapshot_inum) {
fprintf(f, "Snapshot inode: %u\n",
sb->s_snapshot_inum);
diff --git a/lib/ext2fs/closefs.c b/lib/ext2fs/closefs.c
index 3e4af7f..4e91778 100644
--- a/lib/ext2fs/closefs.c
+++ b/lib/ext2fs/closefs.c
@@ -35,8 +35,16 @@
int ext2fs_bg_has_super(ext2_filsys fs, dgrp_t group)
{
- if (!(fs->super->s_feature_ro_compat &
- EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER) || group <= 1)
+ if (group == 0)
+ return 1;
+ if (fs->super->s_feature_compat & EXT4_FEATURE_COMPAT_SPARSE_SUPER2) {
+ if (group == fs->super->s_backup_bgs[0] ||
+ group == fs->super->s_backup_bgs[1])
+ return 1;
+ return 0;
+ }
+ if ((group <= 1) || !(fs->super->s_feature_ro_compat &
+ EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER))
return 1;
if (!(group & 1))
return 0;
diff --git a/lib/ext2fs/ext2_fs.h b/lib/ext2fs/ext2_fs.h
index 930c2a3..d9e14d7 100644
--- a/lib/ext2fs/ext2_fs.h
+++ b/lib/ext2fs/ext2_fs.h
@@ -645,7 +645,8 @@
__u32 s_usr_quota_inum; /* inode number of user quota file */
__u32 s_grp_quota_inum; /* inode number of group quota file */
__u32 s_overhead_blocks; /* overhead blocks/clusters in fs */
- __u32 s_reserved[108]; /* Padding to the end of the block */
+ __u32 s_backup_bgs[2]; /* If sparse_super2 enabled */
+ __u32 s_reserved[106]; /* Padding to the end of the block */
__u32 s_checksum; /* crc32c(superblock) */
};
@@ -696,6 +697,7 @@
#define EXT2_FEATURE_COMPAT_LAZY_BG 0x0040
/* #define EXT2_FEATURE_COMPAT_EXCLUDE_INODE 0x0080 not used, legacy */
#define EXT2_FEATURE_COMPAT_EXCLUDE_BITMAP 0x0100
+#define EXT4_FEATURE_COMPAT_SPARSE_SUPER2 0x0200
#define EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
diff --git a/lib/ext2fs/ext2fs.h b/lib/ext2fs/ext2fs.h
index 3e633e2..1491c62 100644
--- a/lib/ext2fs/ext2fs.h
+++ b/lib/ext2fs/ext2fs.h
@@ -550,7 +550,8 @@
EXT3_FEATURE_COMPAT_HAS_JOURNAL|\
EXT2_FEATURE_COMPAT_RESIZE_INODE|\
EXT2_FEATURE_COMPAT_DIR_INDEX|\
- EXT2_FEATURE_COMPAT_EXT_ATTR)
+ EXT2_FEATURE_COMPAT_EXT_ATTR|\
+ EXT4_FEATURE_COMPAT_SPARSE_SUPER2)
/* This #ifdef is temporary until compression is fully supported */
#ifdef ENABLE_COMPRESSION
diff --git a/lib/ext2fs/initialize.c b/lib/ext2fs/initialize.c
index 2db8b3c..36c94a9 100644
--- a/lib/ext2fs/initialize.c
+++ b/lib/ext2fs/initialize.c
@@ -173,6 +173,8 @@
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;
@@ -422,6 +424,21 @@
* 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;
diff --git a/lib/ext2fs/res_gdt.c b/lib/ext2fs/res_gdt.c
index 6449228..e61c330 100644
--- a/lib/ext2fs/res_gdt.c
+++ b/lib/ext2fs/res_gdt.c
@@ -31,6 +31,19 @@
int mult = 3;
unsigned int ret;
+ if (fs->super->s_feature_compat & EXT4_FEATURE_COMPAT_SPARSE_SUPER2) {
+ if (*min == 1) {
+ *min += 1;
+ if (fs->super->s_backup_bgs[0])
+ return fs->super->s_backup_bgs[0];
+ }
+ if (*min == 2) {
+ *min += 1;
+ if (fs->super->s_backup_bgs[1])
+ return fs->super->s_backup_bgs[1];
+ }
+ return fs->group_desc_count;
+ }
if (!(fs->super->s_feature_ro_compat &
EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER)) {
ret = *min;
diff --git a/lib/ext2fs/swapfs.c b/lib/ext2fs/swapfs.c
index 56c66cc..2a7b768 100644
--- a/lib/ext2fs/swapfs.c
+++ b/lib/ext2fs/swapfs.c
@@ -99,6 +99,8 @@
}
for (; i < 17; i++)
sb->s_jnl_blocks[i] = ext2fs_swab32(sb->s_jnl_blocks[i]);
+ sb->s_backup_bgs[0] = ext2fs_swab32(sb->s_backup_bgs[0]);
+ sb->s_backup_bgs[1] = ext2fs_swab32(sb->s_backup_bgs[1]);
}
void ext2fs_swap_group_desc2(ext2_filsys fs, struct ext2_group_desc *gdp)
diff --git a/lib/ext2fs/tst_super_size.c b/lib/ext2fs/tst_super_size.c
index 85d87e1..f9cec8a 100644
--- a/lib/ext2fs/tst_super_size.c
+++ b/lib/ext2fs/tst_super_size.c
@@ -135,7 +135,8 @@
check_field(s_usr_quota_inum, 4);
check_field(s_grp_quota_inum, 4);
check_field(s_overhead_blocks, 4);
- check_field(s_reserved, 108 * 4);
+ check_field(s_backup_bgs, 8);
+ check_field(s_reserved, 106 * 4);
check_field(s_checksum, 4);
do_field("Superblock end", 0, 0, cur_offset, 1024);
#endif
diff --git a/misc/ext4.5.in b/misc/ext4.5.in
index fab1139..5ec39f5 100644
--- a/misc/ext4.5.in
+++ b/misc/ext4.5.in
@@ -171,6 +171,17 @@
.\" .br
.\" .B Future feature, available in e2fsprogs 1.43-WIP
.TP
+.B sparse_super2
+.br
+This feature indicates that there will only at most two backup
+superblock and block group descriptors. The block groups used to store
+the backup superblock and blockgroup descriptors are stored in the
+superblock, but typically, one will be located at the beginning of block
+group #1, and one in the last block group in the file system. This is
+feature is essentially a more extreme version of sparse_super and is
+designed to allow the a much larger percentage of the disk to have
+contiguous blocks available for data files.
+.TP
.B meta_bg
.br
This ext4 feature allows file systems to be resized on-line without explicitly
diff --git a/misc/mke2fs.8.in b/misc/mke2fs.8.in
index ae74bce..30f7839 100644
--- a/misc/mke2fs.8.in
+++ b/misc/mke2fs.8.in
@@ -274,6 +274,12 @@
entirely one time. If the option value is omitted, it defaults to 1 to
enable lazy journal inode zeroing.
.TP
+.BI num_backup_sb= <0|1|2>
+If the
+.B sparse_super2
+file system feature is enabled this option controls whether there will
+be 0, 1, or 2 backup superblocks created in the file system.
+.TP
.BI root_owner [=uid:gid]
Specify the numeric user and group ID of the root directory. If no UID:GID
is specified, use the user and group ID of the user running \fBmke2fs\fR.
diff --git a/misc/mke2fs.c b/misc/mke2fs.c
index dd77a00..9e6169d 100644
--- a/misc/mke2fs.c
+++ b/misc/mke2fs.c
@@ -88,6 +88,7 @@
static int direct_io;
static int force;
static int noaction;
+static int num_backups = 2; /* number of backup bg's for sparse_super2 */
static uid_t root_uid;
static gid_t root_gid;
int journal_size;
@@ -739,6 +740,21 @@
r_usage++;
continue;
}
+ } else if (strcmp(token, "num_backup_sb") == 0) {
+ if (!arg) {
+ r_usage++;
+ badopt = token;
+ continue;
+ }
+ num_backups = strtoul(arg, &p, 0);
+ if (*p || num_backups > 2) {
+ fprintf(stderr,
+ _("Invalid # of backup "
+ "superbocks: %s\n"),
+ arg);
+ r_usage++;
+ continue;
+ }
} else if (strcmp(token, "stride") == 0) {
if (!arg) {
r_usage++;
@@ -895,6 +911,7 @@
"\tis set off by an equals ('=') sign.\n\n"
"Valid extended options are:\n"
"\tmmp_update_interval=<interval>\n"
+ "\tnum_backup_sb=<0|1|2>\n"
"\tstride=<RAID per-disk data chunk in blocks>\n"
"\tstripe-width=<RAID stride * data disks in blocks>\n"
"\toffset=<offset to create the file system>\n"
@@ -925,7 +942,8 @@
EXT3_FEATURE_COMPAT_HAS_JOURNAL |
EXT2_FEATURE_COMPAT_RESIZE_INODE |
EXT2_FEATURE_COMPAT_DIR_INDEX |
- EXT2_FEATURE_COMPAT_EXT_ATTR,
+ EXT2_FEATURE_COMPAT_EXT_ATTR |
+ EXT4_FEATURE_COMPAT_SPARSE_SUPER2,
/* Incompat */
EXT2_FEATURE_INCOMPAT_FILETYPE|
EXT3_FEATURE_INCOMPAT_EXTENTS|
@@ -1975,6 +1993,8 @@
}
#endif
+ num_backups = get_int_from_profile(fs_types, "num_backup_sb", 2);
+
blocksize = EXT2_BLOCK_SIZE(&fs_param);
/*
@@ -2171,6 +2191,13 @@
ext2fs_r_blocks_count_set(&fs_param, reserved_ratio *
ext2fs_blocks_count(&fs_param) / 100.0);
+ if (fs_param.s_feature_compat & EXT4_FEATURE_COMPAT_SPARSE_SUPER2) {
+ if (num_backups >= 1)
+ fs_param.s_backup_bgs[0] = 1;
+ if (num_backups >= 2)
+ fs_param.s_backup_bgs[1] = ~0;
+ }
+
free(fs_type);
free(usage_types);
}
@@ -2603,8 +2630,8 @@
read_bb_file(fs, &bb_list, bad_blocks_filename);
if (cflag)
test_disk(fs, &bb_list);
-
handle_bad_blocks(fs, bb_list);
+
fs->stride = fs_stride = fs->super->s_raid_stride;
if (!quiet)
printf("%s", _("Allocating group tables: "));
diff --git a/misc/mke2fs.conf.5.in b/misc/mke2fs.conf.5.in
index 758cdf4..894805a 100644
--- a/misc/mke2fs.conf.5.in
+++ b/misc/mke2fs.conf.5.in
@@ -360,6 +360,11 @@
.I journal_location
This relation specifies the location of the journal.
.TP
+.I num_backup_sb
+This relation indicates whether file systems with the
+.B sparse_super2
+feature enabled should be created with 0, 1, or 2 backup superblocks.
+.TP
.I inode_ratio
This relation specifies the default inode ratio if the user does not
specify one on the command line.
diff --git a/resize/online.c b/resize/online.c
index defcac1..46d86b0 100644
--- a/resize/online.c
+++ b/resize/online.c
@@ -76,6 +76,14 @@
no_resize_ioctl = 1;
}
+ if (EXT2_HAS_COMPAT_FEATURE(fs->super,
+ EXT4_FEATURE_COMPAT_SPARSE_SUPER2) &&
+ (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);
diff --git a/resize/resize2fs.c b/resize/resize2fs.c
index c4c2517..b0c4b5e 100644
--- a/resize/resize2fs.c
+++ b/resize/resize2fs.c
@@ -53,6 +53,9 @@
static errcode_t fix_sb_journal_backup(ext2_filsys fs);
static errcode_t mark_table_blocks(ext2_filsys fs,
ext2fs_block_bitmap bmap);
+static errcode_t clear_sparse_super2_last_group(ext2_resize_t rfs);
+static errcode_t reserve_sparse_super2_last_group(ext2_resize_t rfs,
+ ext2fs_block_bitmap meta_bmap);
/*
* Some helper CPP macros
@@ -191,6 +194,10 @@
goto errout;
print_resource_track(rfs, &rtrack, fs->io);
+ retval = clear_sparse_super2_last_group(rfs);
+ if (retval)
+ goto errout;
+
rfs->new_fs->super->s_state &= ~EXT2_ERROR_FS;
rfs->new_fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
@@ -460,6 +467,33 @@
}
/*
+ * Update the location of the backup superblocks if the
+ * sparse_super2 feature is enabled.
+ */
+ if (fs->super->s_feature_compat & EXT4_FEATURE_COMPAT_SPARSE_SUPER2) {
+ dgrp_t last_bg = fs->group_desc_count - 1;
+ dgrp_t old_last_bg = old_fs->group_desc_count - 1;
+
+ if (last_bg > old_last_bg) {
+ if (old_fs->group_desc_count == 1)
+ fs->super->s_backup_bgs[0] = 1;
+ if (old_fs->group_desc_count == 1 &&
+ fs->super->s_backup_bgs[0])
+ fs->super->s_backup_bgs[0] = last_bg;
+ else if (fs->super->s_backup_bgs[1])
+ fs->super->s_backup_bgs[1] = last_bg;
+ } else if (last_bg < old_last_bg) {
+ if (fs->super->s_backup_bgs[0] > last_bg)
+ fs->super->s_backup_bgs[0] = 0;
+ if (fs->super->s_backup_bgs[1] > last_bg)
+ fs->super->s_backup_bgs[1] = 0;
+ if (last_bg > 1 &&
+ old_fs->super->s_backup_bgs[1] == old_last_bg)
+ fs->super->s_backup_bgs[1] = last_bg;
+ }
+ }
+
+ /*
* If we are shrinking the number of block groups, we're done
* and can exit now.
*/
@@ -615,14 +649,13 @@
*/
static errcode_t adjust_superblock(ext2_resize_t rfs, blk64_t new_size)
{
- ext2_filsys fs;
+ ext2_filsys fs = rfs->new_fs;
int adj = 0;
errcode_t retval;
blk64_t group_block;
unsigned long i;
unsigned long max_group;
- fs = rfs->new_fs;
ext2fs_mark_super_dirty(fs);
ext2fs_mark_bb_dirty(fs);
ext2fs_mark_ib_dirty(fs);
@@ -952,6 +985,10 @@
new_blocks = fs->desc_blocks + fs->super->s_reserved_gdt_blocks;
}
+ retval = reserve_sparse_super2_last_group(rfs, meta_bmap);
+ if (retval)
+ goto errout;
+
if (old_blocks == new_blocks) {
retval = 0;
goto errout;
@@ -1840,6 +1877,147 @@
}
/*
+ * This function is used when expanding a file system. It frees the
+ * superblock and block group descriptor blocks from the block group
+ * which is no longer the last block group.
+ */
+static errcode_t clear_sparse_super2_last_group(ext2_resize_t rfs)
+{
+ ext2_filsys fs = rfs->new_fs;
+ ext2_filsys old_fs = rfs->old_fs;
+ errcode_t retval;
+ dgrp_t old_last_bg = rfs->old_fs->group_desc_count - 1;
+ dgrp_t last_bg = fs->group_desc_count - 1;
+ blk64_t sb, old_desc;
+ blk_t num;
+
+ if (!(fs->super->s_feature_compat & EXT4_FEATURE_COMPAT_SPARSE_SUPER2))
+ return 0;
+
+ if (last_bg <= old_last_bg)
+ return 0;
+
+ if (fs->super->s_backup_bgs[0] == old_fs->super->s_backup_bgs[0] &&
+ fs->super->s_backup_bgs[1] == old_fs->super->s_backup_bgs[1])
+ return 0;
+
+ if (old_fs->super->s_backup_bgs[0] != old_last_bg &&
+ old_fs->super->s_backup_bgs[1] != old_last_bg)
+ return 0;
+
+ if (fs->super->s_backup_bgs[0] == old_last_bg ||
+ fs->super->s_backup_bgs[1] == old_last_bg)
+ return 0;
+
+ retval = ext2fs_super_and_bgd_loc2(rfs->old_fs, old_last_bg,
+ &sb, &old_desc, NULL, &num);
+ if (retval)
+ return retval;
+
+ if (sb)
+ ext2fs_unmark_block_bitmap2(fs->block_map, sb);
+ if (old_desc)
+ ext2fs_unmark_block_bitmap_range2(fs->block_map, old_desc, num);
+ return 0;
+}
+
+/*
+ * This function is used when shrinking a file system. We need to
+ * utilize blocks from what will be the new last block group for the
+ * backup superblock and block group descriptor blocks.
+ * Unfortunately, those blocks may be used by other files or fs
+ * metadata blocks. We need to mark them as being in use.
+ */
+static errcode_t reserve_sparse_super2_last_group(ext2_resize_t rfs,
+ ext2fs_block_bitmap meta_bmap)
+{
+ ext2_filsys fs = rfs->new_fs;
+ ext2_filsys old_fs = rfs->old_fs;
+ errcode_t retval;
+ dgrp_t old_last_bg = rfs->old_fs->group_desc_count - 1;
+ dgrp_t last_bg = fs->group_desc_count - 1;
+ dgrp_t g;
+ blk64_t blk, sb, old_desc;
+ blk_t i, num;
+ int realloc = 0;
+
+ if (!(fs->super->s_feature_compat & EXT4_FEATURE_COMPAT_SPARSE_SUPER2))
+ return 0;
+
+ if (last_bg >= old_last_bg)
+ return 0;
+
+ if (fs->super->s_backup_bgs[0] == old_fs->super->s_backup_bgs[0] &&
+ fs->super->s_backup_bgs[1] == old_fs->super->s_backup_bgs[1])
+ return 0;
+
+ if (fs->super->s_backup_bgs[0] != last_bg &&
+ fs->super->s_backup_bgs[1] != last_bg)
+ return 0;
+
+ if (old_fs->super->s_backup_bgs[0] == last_bg ||
+ old_fs->super->s_backup_bgs[1] == last_bg)
+ return 0;
+
+ retval = ext2fs_super_and_bgd_loc2(rfs->new_fs, last_bg,
+ &sb, &old_desc, NULL, &num);
+ if (retval)
+ return retval;
+
+ if (!sb) {
+ fputs(_("Should never happen! No sb in last super_sparse bg?\n"),
+ stderr);
+ exit(1);
+ }
+ if (old_desc != sb+1) {
+ fputs(_("Should never happen! Unexpected old_desc in "
+ "super_sparse bg?\n"),
+ stderr);
+ exit(1);
+ }
+ num = (old_desc) ? num : 1;
+
+ /* Reserve the backup blocks */
+ ext2fs_mark_block_bitmap_range2(fs->block_map, sb, num);
+
+ for (g = 0; g < fs->group_desc_count; g++) {
+ blk64_t mb;
+
+ mb = ext2fs_block_bitmap_loc(fs, g);
+ if ((mb >= sb) && (mb < sb + num)) {
+ ext2fs_block_bitmap_loc_set(fs, g, 0);
+ realloc = 1;
+ }
+ mb = ext2fs_inode_bitmap_loc(fs, g);
+ if ((mb >= sb) && (mb < sb + num)) {
+ ext2fs_inode_bitmap_loc_set(fs, g, 0);
+ realloc = 1;
+ }
+ mb = ext2fs_inode_table_loc(fs, g);
+ if ((mb < sb + num) &&
+ (sb < mb + fs->inode_blocks_per_group)) {
+ ext2fs_inode_table_loc_set(fs, g, 0);
+ realloc = 1;
+ }
+ if (realloc) {
+ retval = ext2fs_allocate_group_table(fs, g, 0);
+ if (retval)
+ return retval;
+ }
+ }
+
+ for (blk = sb, i = 0; i < num; blk++, i++) {
+ if (ext2fs_test_block_bitmap2(old_fs->block_map, blk) &&
+ !ext2fs_test_block_bitmap2(meta_bmap, blk)) {
+ ext2fs_mark_block_bitmap2(rfs->move_blocks, blk);
+ rfs->needed_blocks++;
+ }
+ ext2fs_mark_block_bitmap2(rfs->reserve_blocks, blk);
+ }
+ return 0;
+}
+
+/*
* Fix the resize inode
*/
static errcode_t fix_resize_inode(ext2_filsys fs)