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Date: Fri, 7 Aug 2015 12:51:29 +0200
From: Jan Kara <jack@...e.com>
To: linux-ext4@...r.kernel.org
Cc: Ted Tso <tytso@....edu>,
"Darrick J. Wong" <darrick.wong@...cle.com>,
Jan Kara <jack@...e.com>
Subject: [PATCH 19/19] resize2fs: Use libextfs2 helpers for resizing
Signed-off-by: Jan Kara <jack@...e.com>
---
resize/online.c | 14 +-
resize/resize2fs.c | 2307 ++++++++++++----------------------------------------
resize/resize2fs.h | 15 +-
3 files changed, 551 insertions(+), 1785 deletions(-)
diff --git a/resize/online.c b/resize/online.c
index 46d86b0f3c8d..d202c0e92e6e 100644
--- a/resize/online.c
+++ b/resize/online.c
@@ -197,6 +197,12 @@ errcode_t online_resize_fs(ext2_filsys fs, const char *mtpt,
return retval;
}
+ retval = validate_fs_size(fs, new_size);
+ if (retval) {
+ close(fd);
+ return retval;
+ }
+
retval = ext2fs_dup_handle(fs, &new_fs);
if (retval) {
close(fd);
@@ -214,7 +220,13 @@ errcode_t online_resize_fs(ext2_filsys fs, const char *mtpt,
* 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);
+ retval = adjust_fs_info(new_fs, fs, *new_size);
+ if (retval) {
+ close(fd);
+ return retval;
+ }
+
+ retval = alloc_new_groups(new_fs, fs->group_desc_count);
if (retval) {
close(fd);
return retval;
diff --git a/resize/resize2fs.c b/resize/resize2fs.c
index 22300836300d..8531c59b859b 100644
--- a/resize/resize2fs.c
+++ b/resize/resize2fs.c
@@ -13,24 +13,36 @@
*/
/*
- * Resizing a filesystem consists of the following phases:
+ * Shrinking a filesystem consists of the following phases:
*
- * 1. Adjust superblock and write out new parts of the inode
- * table
- * 2. Determine blocks which need to be relocated, and copy the
- * contents of blocks from their old locations to the new ones.
- * 3. Scan the inode table, doing the following:
- * a. If blocks have been moved, update the block
- * pointers in the inodes and indirect blocks to
- * point at the new block locations.
- * b. If parts of the inode table need to be evacuated,
- * copy inodes from their old locations to their
- * new ones.
- * c. If (b) needs to be done, note which blocks contain
- * directory information, since we will need to
- * update the directory information.
- * 4. Update the directory blocks with the new inode locations.
- * 5. Move the inode tables, if necessary.
+ * 1. We validate whether filesystem size is sane
+ * 2. We identify blocks which need moving (beyond new end of the
+ * filesystem, under new sb backup if sparse_super2 is enabled) and
+ * move them. ext2fs_move_blocks() also takes care of updating all the
+ * block references.
+ * 3. We identify inodes which need moving (beyond end of the new
+ * filesystem) and move them. ext2fs_move_inodes() also takes care of
+ * updating all the inode references.
+ * 4. We create new fs structure with updated number of block groups.
+ * 5. We free metadata of groups that will be removed (with flex_bg
+ * feature they can be allocated inside area of the new filesystem).
+ * 6. We free backup group descriptor blocks which are not needed anymore.
+ * 7. We recompute group & global allocation counters.
+ * 8. We rewrite resize inode to contain now reserved blocks for backup
+ * group descriptors.
+ *
+ * Growing a filesystem consists of the following phases:
+ * 1. We validate whether filesystem size is sane
+ * 2. We create new fs structure with updated number of block groups.
+ * 3. We allocate and initialize bitmaps & inode tables for new groups.
+ * 4. We identify blocks that need moving to make space for new group
+ * descriptor backups and move them. ext2fs_move_blocks() also takes
+ * care of updating all the block references.
+ * 5. We free space of group descriptor backups that aren't needed anymore
+ * (happens with sparse_super2 feature).
+ * 6. We recompute group & global allocation counters.
+ * 7. We rewrite resize inode to contain now reserved blocks for backup
+ * group descriptors.
*/
#include "config.h"
@@ -41,20 +53,16 @@
#define RESIZE2FS_DEBUG
#endif
-static errcode_t adjust_superblock(ext2_resize_t rfs, blk64_t new_size);
-static errcode_t blocks_to_move(ext2_resize_t rfs);
-static errcode_t block_mover(ext2_resize_t rfs);
-static errcode_t inode_scan_and_fix(ext2_resize_t rfs);
-static errcode_t inode_ref_fix(ext2_resize_t rfs);
-static errcode_t move_itables(ext2_resize_t rfs);
static errcode_t fix_resize_inode(ext2_filsys fs);
static errcode_t ext2fs_calculate_summary_stats(ext2_filsys fs);
-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);
+static errcode_t free_group_metadata(ext2_resize_t rfs);
+static errcode_t prepare_shrink(ext2_filsys fs, blk64_t new_size);
+static errcode_t init_new_itables(ext2_resize_t rfs);
+static errcode_t free_gd_blocks(ext2_resize_t rfs);
+static errcode_t make_space_for_gd(ext2_resize_t rfs);
/*
* Some helper CPP macros
@@ -100,7 +108,6 @@ errcode_t resize_fs(ext2_filsys fs, blk64_t *new_size, int flags,
fs->priv_data = rfs;
rfs->old_fs = fs;
rfs->flags = flags;
- rfs->itable_buf = 0;
rfs->progress = progress;
init_resource_track(&overall_track, "overall resize2fs", fs->io);
@@ -117,62 +124,74 @@ errcode_t resize_fs(ext2_filsys fs, blk64_t *new_size, int flags,
init_resource_track(&rtrack, "fix_uninit_block_bitmaps 1", fs->io);
ext2fs_init_uninit_block_bitmaps(fs);
print_resource_track(rfs, &rtrack, fs->io);
- retval = ext2fs_dup_handle(fs, &rfs->new_fs);
- if (retval)
- goto errout;
- init_resource_track(&rtrack, "adjust_superblock", fs->io);
- retval = adjust_superblock(rfs, *new_size);
+ retval = validate_fs_size(fs, new_size);
if (retval)
goto errout;
- print_resource_track(rfs, &rtrack, fs->io);
-
- init_resource_track(&rtrack, "fix_uninit_block_bitmaps 2", fs->io);
- ext2fs_init_uninit_block_bitmaps(rfs->new_fs);
- print_resource_track(rfs, &rtrack, fs->io);
- /* Clear the block bitmap uninit flag for the last block group */
- ext2fs_bg_flags_clear(rfs->new_fs, rfs->new_fs->group_desc_count - 1,
- EXT2_BG_BLOCK_UNINIT);
- *new_size = ext2fs_blocks_count(rfs->new_fs->super);
+ if (*new_size < ext2fs_blocks_count(fs->super)) {
+ init_resource_track(&rtrack, "prepare_shrink", fs->io);
+ retval = prepare_shrink(fs, *new_size);
+ if (retval)
+ goto errout;
+ print_resource_track(rfs, &rtrack, fs->io);
+ }
- init_resource_track(&rtrack, "blocks_to_move", fs->io);
- retval = blocks_to_move(rfs);
+ retval = ext2fs_dup_handle(fs, &rfs->new_fs);
if (retval)
goto errout;
- print_resource_track(rfs, &rtrack, fs->io);
-
-#ifdef RESIZE2FS_DEBUG
- if (rfs->flags & RESIZE_DEBUG_BMOVE)
- printf("Number of free blocks: %llu/%llu, Needed: %llu\n",
- ext2fs_free_blocks_count(rfs->old_fs->super),
- ext2fs_free_blocks_count(rfs->new_fs->super),
- rfs->needed_blocks);
-#endif
- init_resource_track(&rtrack, "block_mover", fs->io);
- retval = block_mover(rfs);
+ init_resource_track(&rtrack, "adjust_fs_info", fs->io);
+ retval = adjust_fs_info(rfs->new_fs, fs, *new_size);
if (retval)
goto errout;
print_resource_track(rfs, &rtrack, fs->io);
- init_resource_track(&rtrack, "inode_scan_and_fix", fs->io);
- retval = inode_scan_and_fix(rfs);
- if (retval)
- goto errout;
- print_resource_track(rfs, &rtrack, fs->io);
+ if (*new_size > ext2fs_blocks_count(fs->super)) {
+ retval = alloc_new_groups(rfs->new_fs,
+ rfs->old_fs->group_desc_count);
+ if (retval)
+ goto errout;
- init_resource_track(&rtrack, "inode_ref_fix", fs->io);
- retval = inode_ref_fix(rfs);
- if (retval)
- goto errout;
- print_resource_track(rfs, &rtrack, fs->io);
+ retval = init_new_itables(rfs);
+ if (retval)
+ goto errout;
- init_resource_track(&rtrack, "move_itables", fs->io);
- retval = move_itables(rfs);
- if (retval)
- goto errout;
- print_resource_track(rfs, &rtrack, fs->io);
+ init_resource_track(&rtrack, "fix_uninit_block_bitmaps 2",
+ fs->io);
+ ext2fs_init_uninit_block_bitmaps(rfs->new_fs);
+ print_resource_track(rfs, &rtrack, fs->io);
+ }
+
+ /* Clear the block bitmap uninit flag for the last block group */
+ ext2fs_bg_flags_clear(rfs->new_fs, rfs->new_fs->group_desc_count - 1,
+ EXT2_BG_BLOCK_UNINIT);
+
+ if (*new_size > ext2fs_blocks_count(fs->super)) {
+ init_resource_track(&rtrack, "make_space_for_gd", fs->io);
+ retval = make_space_for_gd(rfs);
+ if (retval)
+ goto errout;
+ print_resource_track(rfs, &rtrack, fs->io);
+
+ retval = clear_sparse_super2_last_group(rfs);
+ if (retval)
+ goto errout;
+ } else {
+ init_resource_track(&rtrack, "free_group_metadata", fs->io);
+ /* Now free metadata of groups we don't need anymore */
+ retval = free_group_metadata(rfs);
+ if (retval)
+ goto errout;
+ print_resource_track(rfs, &rtrack, fs->io);
+
+ init_resource_track(&rtrack, "free_gd_blocks", fs->io);
+ /* Free backup group descriptors we don't need */
+ retval = free_gd_blocks(rfs);
+ if (retval)
+ goto errout;
+ print_resource_track(rfs, &rtrack, fs->io);
+ }
init_resource_track(&rtrack, "calculate_summary_stats", fs->io);
retval = ext2fs_calculate_summary_stats(rfs->new_fs);
@@ -186,22 +205,15 @@ errcode_t resize_fs(ext2_filsys fs, blk64_t *new_size, int flags,
goto errout;
print_resource_track(rfs, &rtrack, fs->io);
- init_resource_track(&rtrack, "fix_sb_journal_backup", fs->io);
- retval = fix_sb_journal_backup(rfs->new_fs);
- if (retval)
- goto errout;
- print_resource_track(rfs, &rtrack, fs->io);
-
- retval = clear_sparse_super2_last_group(rfs);
- if (retval)
- goto errout;
-
retval = ext2fs_set_gdt_csum(rfs->new_fs);
if (retval)
goto errout;
rfs->new_fs->super->s_state &= ~EXT2_ERROR_FS;
rfs->new_fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
+ ext2fs_mark_bb_dirty(rfs->new_fs);
+ ext2fs_mark_ib_dirty(rfs->new_fs);
+ ext2fs_mark_super_dirty(rfs->new_fs);
print_resource_track(rfs, &overall_track, fs->io);
retval = ext2fs_close_free(&rfs->new_fs);
@@ -212,12 +224,6 @@ errcode_t resize_fs(ext2_filsys fs, blk64_t *new_size, int flags,
ext2fs_free(rfs->old_fs);
rfs->old_fs = NULL;
- if (rfs->itable_buf)
- ext2fs_free_mem(&rfs->itable_buf);
- if (rfs->reserve_blocks)
- ext2fs_free_block_bitmap(rfs->reserve_blocks);
- if (rfs->move_blocks)
- ext2fs_free_block_bitmap(rfs->move_blocks);
ext2fs_free_mem(&rfs);
return 0;
@@ -227,8 +233,6 @@ errout:
ext2fs_free(rfs->new_fs);
rfs->new_fs = NULL;
}
- if (rfs->itable_buf)
- ext2fs_free_mem(&rfs->itable_buf);
ext2fs_free_mem(&rfs);
return retval;
}
@@ -263,21 +267,73 @@ static void adjust_reserved_gdt_blocks(ext2_filsys old_fs, ext2_filsys fs)
*/
/*
- * If the group descriptor's bitmap and inode table blocks are valid,
- * release them in the new filesystem data structure, and mark them as
- * reserved so the old inode table blocks don't get overwritten.
+ * Check whether requested filesystem size is sane. Round it down in case the
+ * last group would be too small.
+ */
+errcode_t validate_fs_size(ext2_filsys fs, blk64_t *new_sizep)
+{
+ blk64_t new_size = *new_sizep;
+ dgrp_t groups;
+ blk64_t desc_blocks;
+ blk64_t overhead = 0, rem;
+ unsigned long long new_inodes; /* u64 to check for overflow */
+
+retry:
+ groups = ext2fs_div64_ceil(new_size - fs->super->s_first_data_block,
+ EXT2_BLOCKS_PER_GROUP(fs->super));
+ if (groups == 0)
+ return EXT2_ET_TOOSMALL;
+ desc_blocks = ext2fs_div_ceil(groups, EXT2_DESC_PER_BLOCK(fs->super));
+
+ /*
+ * Overhead is the number of bookkeeping blocks per group. It
+ * includes the superblock backup, the group descriptor
+ * backups, the inode bitmap, the block bitmap, and the inode
+ * table.
+ */
+ overhead = 2 + fs->inode_blocks_per_group;
+ if (ext2fs_bg_has_super(fs, groups - 1))
+ overhead += 1 + desc_blocks + fs->super->s_reserved_gdt_blocks;
+
+ /*
+ * See if the last group is big enough to support the
+ * necessary data structures. If not, we need to get rid of
+ * it.
+ */
+ rem = (new_size - fs->super->s_first_data_block) %
+ fs->super->s_blocks_per_group;
+ if (groups == 1 && rem && rem < overhead)
+ return EXT2_ET_TOOSMALL;
+ if (groups > 1 && rem && rem < overhead + 50) {
+ new_size -= rem;
+ goto retry;
+ }
+
+ new_inodes = ((unsigned long long)fs->super->s_inodes_per_group) *
+ groups;
+ if (new_inodes > ~0U) {
+ fprintf(stderr, _("inodes (%llu) must be less than %u"),
+ new_inodes, ~0U);
+ return EXT2_ET_TOO_MANY_INODES;
+ }
+
+ *new_sizep = new_size;
+ return 0;
+}
+
+/*
+ * If the group descriptor's bitmap and inode table blocks are valid, release
+ * them. With FLEX_BG this may actually free some space in the shrunk
+ * filesystem.
*/
-static errcode_t free_gdp_blocks(ext2_filsys fs,
- ext2fs_block_bitmap reserve_blocks,
- ext2_filsys old_fs,
- dgrp_t group)
+static errcode_t free_group_metadata(ext2_resize_t rfs)
{
+ ext2_filsys fs = rfs->new_fs, old_fs = rfs->old_fs;
blk64_t blk;
int j;
dgrp_t i;
ext2fs_block_bitmap bg_map = NULL;
errcode_t retval = 0;
- dgrp_t count = old_fs->group_desc_count - fs->group_desc_count;
/* If bigalloc, don't free metadata living in the same cluster */
if (EXT2FS_CLUSTER_RATIO(fs) > 1) {
@@ -290,22 +346,18 @@ static errcode_t free_gdp_blocks(ext2_filsys fs,
goto out;
}
- for (i = group; i < group + count; i++) {
+ for (i = fs->group_desc_count; i < old_fs->group_desc_count; i++) {
blk = ext2fs_block_bitmap_loc(old_fs, i);
if (blk &&
(blk < ext2fs_blocks_count(fs->super)) &&
- !(bg_map && ext2fs_test_block_bitmap2(bg_map, blk))) {
+ !(bg_map && ext2fs_test_block_bitmap2(bg_map, blk)))
ext2fs_block_alloc_stats2(fs, blk, -1);
- ext2fs_mark_block_bitmap2(reserve_blocks, blk);
- }
blk = ext2fs_inode_bitmap_loc(old_fs, i);
if (blk &&
(blk < ext2fs_blocks_count(fs->super)) &&
- !(bg_map && ext2fs_test_block_bitmap2(bg_map, blk))) {
+ !(bg_map && ext2fs_test_block_bitmap2(bg_map, blk)))
ext2fs_block_alloc_stats2(fs, blk, -1);
- ext2fs_mark_block_bitmap2(reserve_blocks, blk);
- }
blk = ext2fs_inode_table_loc(old_fs, i);
for (j = 0;
@@ -314,7 +366,6 @@ static errcode_t free_gdp_blocks(ext2_filsys fs,
(bg_map && ext2fs_test_block_bitmap2(bg_map, blk)))
continue;
ext2fs_block_alloc_stats2(fs, blk, -1);
- ext2fs_mark_block_bitmap2(reserve_blocks, blk);
}
}
@@ -325,250 +376,180 @@ out:
}
/*
- * This routine is shared by the online and offline resize routines.
- * All of the information which is adjusted in memory is done here.
+ * Prepare filesystem for shrinking - free up all space beyond new end of the
+ * filesystem and space needed for new group descriptor backups. Also move
+ * inodes that are in removed block groups into block groups that remain.
*/
-errcode_t adjust_fs_info(ext2_filsys fs, ext2_filsys old_fs,
- ext2fs_block_bitmap reserve_blocks, blk64_t new_size)
+static errcode_t prepare_shrink(ext2_filsys fs, blk64_t new_size)
{
+ dgrp_t groups, i;
+ blk64_t blk;
+ blk64_t blk_per_g = EXT2_BLOCKS_PER_GROUP(fs->super);
+ ext2fs_inode_bitmap move_inodes = NULL;
+ ext2fs_block_bitmap move_blocks = NULL;
+ ext2_ino_t old_inos, new_inos, ino;
errcode_t retval;
- blk64_t overhead = 0;
- blk64_t rem;
- blk64_t blk, group_block;
- blk64_t real_end;
- blk64_t old_numblocks, numblocks, adjblocks;
- unsigned long i, j, old_desc_blocks;
- unsigned int meta_bg, meta_bg_size;
- int has_super, csum_flag;
- unsigned long long new_inodes; /* u64 to check for overflow */
- double percent;
-
- ext2fs_blocks_count_set(fs->super, new_size);
-
-retry:
- fs->group_desc_count = ext2fs_div64_ceil(ext2fs_blocks_count(fs->super) -
- fs->super->s_first_data_block,
- EXT2_BLOCKS_PER_GROUP(fs->super));
- if (fs->group_desc_count == 0)
- return EXT2_ET_TOOSMALL;
- fs->desc_blocks = ext2fs_div_ceil(fs->group_desc_count,
- EXT2_DESC_PER_BLOCK(fs->super));
-
- /*
- * Overhead is the number of bookkeeping blocks per group. It
- * includes the superblock backup, the group descriptor
- * backups, the inode bitmap, the block bitmap, and the inode
- * table.
- */
- overhead = (int) (2 + fs->inode_blocks_per_group);
- if (ext2fs_bg_has_super(fs, fs->group_desc_count - 1))
- overhead += 1 + fs->desc_blocks +
- fs->super->s_reserved_gdt_blocks;
+ groups = ext2fs_div64_ceil(new_size - fs->super->s_first_data_block,
+ blk_per_g);
+ retval = ext2fs_allocate_block_bitmap(fs, _("blocks to be moved"),
+ &move_blocks);
+ if (retval)
+ goto errout;
/*
- * See if the last group is big enough to support the
- * necessary data structures. If not, we need to get rid of
- * it.
- */
- rem = (ext2fs_blocks_count(fs->super) - fs->super->s_first_data_block) %
- fs->super->s_blocks_per_group;
- if ((fs->group_desc_count == 1) && rem && (rem < overhead))
- return EXT2_ET_TOOSMALL;
- if ((fs->group_desc_count > 1) && rem && (rem < overhead+50)) {
- ext2fs_blocks_count_set(fs->super,
- ext2fs_blocks_count(fs->super) - rem);
- goto retry;
- }
- /*
- * Adjust the number of inodes
+ * Update the location of the backup superblocks if the sparse_super2
+ * feature is enabled. Mark new backup descriptor blocks in bitmap
+ * to move
*/
- new_inodes =(unsigned long long) fs->super->s_inodes_per_group * fs->group_desc_count;
- if (new_inodes > ~0U) {
- fprintf(stderr, _("inodes (%llu) must be less than %u"),
- new_inodes, ~0U);
- return EXT2_ET_TOO_MANY_INODES;
+ if (fs->super->s_feature_compat & EXT4_FEATURE_COMPAT_SPARSE_SUPER2 &&
+ groups < fs->group_desc_count) {
+ dgrp_t last_bg = groups - 1;
+ dgrp_t old_last_bg = fs->group_desc_count - 1;
+
+ if (last_bg > 1 && fs->super->s_backup_bgs[1] == old_last_bg) {
+ blk64_t desc_blocks = 0;
+ dgrp_t meta_bg, meta_bg_size;
+
+ meta_bg_size = EXT2_DESC_PER_BLOCK(fs->super);
+ meta_bg = last_bg / meta_bg_size;
+
+ if (!(fs->super->s_feature_incompat &
+ EXT2_FEATURE_INCOMPAT_META_BG) ||
+ (meta_bg < fs->super->s_first_meta_bg)) {
+ desc_blocks = ext2fs_div_ceil(groups,
+ EXT2_DESC_PER_BLOCK(fs->super));
+ } else {
+ if (((last_bg % meta_bg_size) == 0) ||
+ ((last_bg % meta_bg_size) == 1) ||
+ ((last_bg % meta_bg_size) == (meta_bg_size-1)))
+ desc_blocks = 1;
+ }
+ fs->super->s_backup_bgs[1] = last_bg;
+ ext2fs_mark_block_bitmap_range2(move_blocks,
+ last_bg * blk_per_g + fs->super->s_first_data_block,
+ 1 + desc_blocks);
+ }
+ 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;
}
- fs->super->s_inodes_count = fs->super->s_inodes_per_group *
- fs->group_desc_count;
-
- /*
- * Adjust the number of free blocks
- */
- blk = ext2fs_blocks_count(old_fs->super);
- if (blk > ext2fs_blocks_count(fs->super))
- ext2fs_free_blocks_count_set(fs->super,
- ext2fs_free_blocks_count(fs->super) -
- (blk - ext2fs_blocks_count(fs->super)));
- else
- ext2fs_free_blocks_count_set(fs->super,
- ext2fs_free_blocks_count(fs->super) +
- (ext2fs_blocks_count(fs->super) - blk));
-
- /*
- * Adjust the number of reserved blocks
- */
- percent = (ext2fs_r_blocks_count(old_fs->super) * 100.0) /
- ext2fs_blocks_count(old_fs->super);
- ext2fs_r_blocks_count_set(fs->super,
- (percent * ext2fs_blocks_count(fs->super) /
- 100.0));
+ /* Mark all blocks beyond new end of fs in bitmap to move */
+ ext2fs_mark_block_bitmap_range2(move_blocks, new_size,
+ ext2fs_blocks_count(fs->super) - new_size);
/*
- * Adjust the bitmaps for size
+ * Now have to we unmark metadata of groups which are going away since
+ * ext2fs_move_blocks() would allocate blocks for them
*/
- retval = ext2fs_resize_inode_bitmap2(fs->super->s_inodes_count,
- fs->super->s_inodes_count,
- fs->inode_map);
- if (retval) goto errout;
-
- real_end = EXT2_GROUPS_TO_BLOCKS(fs->super, fs->group_desc_count) - 1 +
- fs->super->s_first_data_block;
- retval = ext2fs_resize_block_bitmap2(new_size - 1,
- real_end, fs->block_map);
- if (retval) goto errout;
+ for (i = groups; i < fs->group_desc_count; i++) {
+ blk_t num_blocks;
+ blk64_t old_desc_blk, new_desc_blk;
+
+ ext2fs_super_and_bgd_loc2(fs, i, &blk, &old_desc_blk,
+ &new_desc_blk, &num_blocks);
+ if (blk) {
+ ext2fs_unmark_block_bitmap2(move_blocks, blk);
+ num_blocks--;
+ }
+ if (old_desc_blk)
+ blk = old_desc_blk;
+ else
+ blk = new_desc_blk;
- /*
- * If we are growing the file system, also grow the size of
- * the reserve_blocks bitmap
- */
- if (reserve_blocks && new_size > ext2fs_blocks_count(old_fs->super)) {
- retval = ext2fs_resize_block_bitmap2(new_size - 1,
- real_end, reserve_blocks);
- if (retval) goto errout;
- }
+ if (blk)
+ ext2fs_unmark_block_bitmap_range2(move_blocks, blk,
+ num_blocks);
- /*
- * Reallocate the group descriptors as necessary.
- */
- if (old_fs->desc_blocks != fs->desc_blocks) {
- retval = ext2fs_resize_mem(old_fs->desc_blocks *
- fs->blocksize,
- fs->desc_blocks * fs->blocksize,
- &fs->group_desc);
- if (retval)
- goto errout;
- if (fs->desc_blocks > old_fs->desc_blocks)
- memset((char *) fs->group_desc +
- (old_fs->desc_blocks * fs->blocksize), 0,
- (fs->desc_blocks - old_fs->desc_blocks) *
- fs->blocksize);
- }
+ /*
+ * Mark the blocks used for the inode table
+ */
+ blk = ext2fs_inode_table_loc(fs, i);
+ if (blk)
+ ext2fs_unmark_block_bitmap_range2(move_blocks, blk,
+ fs->inode_blocks_per_group);
- /*
- * If the resize_inode feature is set, and we are changing the
- * number of descriptor blocks, then adjust
- * s_reserved_gdt_blocks if possible to avoid needing to move
- * the inode table either now or in the future.
- */
- adjust_reserved_gdt_blocks(old_fs, fs);
+ /*
+ * Mark block used for the block bitmap
+ */
+ blk = ext2fs_block_bitmap_loc(fs, i);
+ if (blk)
+ ext2fs_unmark_block_bitmap2(move_blocks, blk);
- if ((fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG) &&
- (fs->super->s_first_meta_bg > fs->desc_blocks)) {
- fs->super->s_feature_incompat &=
- ~EXT2_FEATURE_INCOMPAT_META_BG;
- fs->super->s_first_meta_bg = 0;
+ /*
+ * Mark block used for the inode bitmap
+ */
+ blk = ext2fs_inode_bitmap_loc(fs, i);
+ if (blk)
+ ext2fs_unmark_block_bitmap2(move_blocks, blk);
}
- /*
- * 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;
+ /* Map of blocks to move is done - let's move them */
+ retval = ext2fs_move_blocks(fs, move_blocks, NULL);
+ if (retval)
+ goto errout;
- 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;
- }
- }
+ /* Didn't remove any group? No need to move any inodes so we are done */
+ if (groups == fs->group_desc_count)
+ goto errout;
- /*
- * If we are shrinking the number of block groups, we're done
- * and can exit now.
- */
- if (old_fs->group_desc_count > fs->group_desc_count) {
- /*
- * Check the block groups that we are chopping off
- * and free any blocks associated with their metadata
- */
- retval = free_gdp_blocks(fs, reserve_blocks, old_fs,
- fs->group_desc_count);
+ /* Move inodes from groups that will be removed */
+ retval = ext2fs_allocate_inode_bitmap(fs, _("inodes to be moved"),
+ &move_inodes);
+ if (retval)
goto errout;
- }
- /*
- * Fix the count of the last (old) block group
- */
- old_numblocks = (ext2fs_blocks_count(old_fs->super) -
- old_fs->super->s_first_data_block) %
- old_fs->super->s_blocks_per_group;
- if (!old_numblocks)
- old_numblocks = old_fs->super->s_blocks_per_group;
- if (old_fs->group_desc_count == fs->group_desc_count) {
- numblocks = (ext2fs_blocks_count(fs->super) -
- fs->super->s_first_data_block) %
- fs->super->s_blocks_per_group;
- if (!numblocks)
- numblocks = fs->super->s_blocks_per_group;
- } else
- numblocks = fs->super->s_blocks_per_group;
- i = old_fs->group_desc_count - 1;
- ext2fs_bg_free_blocks_count_set(fs, i, ext2fs_bg_free_blocks_count(fs, i) + (numblocks - old_numblocks));
- ext2fs_group_desc_csum_set(fs, i);
+ old_inos = fs->group_desc_count * fs->super->s_inodes_per_group;
+ new_inos = groups * fs->super->s_inodes_per_group;
+ for (ino = new_inos; ino < old_inos; ino++)
+ ext2fs_mark_inode_bitmap2(move_inodes, ino);
- /*
- * If the number of block groups is staying the same, we're
- * done and can exit now. (If the number block groups is
- * shrinking, we had exited earlier.)
- */
- if (old_fs->group_desc_count >= fs->group_desc_count) {
- retval = 0;
- goto errout;
- }
+ retval = ext2fs_move_inodes(fs, move_inodes);
+errout:
+ if (move_inodes)
+ ext2fs_free_inode_bitmap(move_inodes);
+ if (move_blocks)
+ ext2fs_free_block_bitmap(move_blocks);
+ return retval;
+}
+
+/*
+ * Allocate space for group metadata (sb & descriptor backups, bitmaps,
+ * inode table)
+ */
+errcode_t alloc_new_groups(ext2_filsys fs, dgrp_t from)
+{
+ errcode_t retval;
+ unsigned long i;
+ int csum_flag;
+ ext2fs_block_bitmap merged_map = NULL;
/*
* Initialize the new block group descriptors
*/
- group_block = ext2fs_group_first_block2(fs,
- old_fs->group_desc_count);
csum_flag = ext2fs_has_group_desc_csum(fs);
if (!getenv("RESIZE2FS_FORCE_ITABLE_INIT") &&
access("/sys/fs/ext4/features/lazy_itable_init", F_OK) == 0)
lazy_itable_init = 1;
- 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;
+
+ retval = ext2fs_copy_bitmap(fs->block_map, &merged_map);
+ if (retval)
+ return retval;
/*
* If we changed the number of block_group descriptor blocks,
- * we need to make sure they are all marked as reserved in the
- * file systems's block allocation map.
+ * we need to make sure they are all marked as reserved so that
+ * ext2fs_allocate_group_table2() called a bit later doesn't use
+ * these blocks for new group's metadata. We mark the blocks as
+ * used in the block bitmap once we free them up.
*/
- for (i = 0; i < old_fs->group_desc_count; i++)
- ext2fs_reserve_super_and_bgd(fs, i, fs->block_map);
+ for (i = 0; i < from; i++)
+ ext2fs_reserve_super_and_bgd(fs, i, merged_map);
- for (i = old_fs->group_desc_count;
- i < fs->group_desc_count; i++) {
+ for (i = from; i < fs->group_desc_count; i++) {
memset(ext2fs_group_desc(fs, fs->group_desc, i), 0,
sizeof(struct ext2_group_desc));
- adjblocks = 0;
ext2fs_bg_flags_zap(fs, i);
if (csum_flag) {
@@ -580,115 +561,34 @@ retry:
fs->super->s_inodes_per_group);
}
- numblocks = ext2fs_group_blocks_count(fs, i);
- if ((i < fs->group_desc_count - 1) && csum_flag)
+ if ((i < fs->group_desc_count - 1) && csum_flag &&
+ !ext2fs_bg_has_super(fs, i))
ext2fs_bg_flags_set(fs, i, EXT2_BG_BLOCK_UNINIT);
- has_super = ext2fs_bg_has_super(fs, i);
- if (has_super) {
- ext2fs_block_alloc_stats2(fs, group_block, +1);
- adjblocks++;
- }
- meta_bg_size = EXT2_DESC_PER_BLOCK(fs->super);
- meta_bg = i / meta_bg_size;
- if (!(fs->super->s_feature_incompat &
- EXT2_FEATURE_INCOMPAT_META_BG) ||
- (meta_bg < fs->super->s_first_meta_bg)) {
- if (has_super) {
- for (j=0; j < old_desc_blocks; j++)
- ext2fs_block_alloc_stats2(fs,
- group_block + 1 + j, +1);
- adjblocks += old_desc_blocks;
- }
- } else {
- if (has_super)
- has_super = 1;
- if (((i % meta_bg_size) == 0) ||
- ((i % meta_bg_size) == 1) ||
- ((i % meta_bg_size) == (meta_bg_size-1)))
- ext2fs_block_alloc_stats2(fs,
- group_block + has_super, +1);
- }
-
- adjblocks += 2 + fs->inode_blocks_per_group;
-
- numblocks -= adjblocks;
- ext2fs_free_blocks_count_set(fs->super,
- ext2fs_free_blocks_count(fs->super) - adjblocks);
- fs->super->s_free_inodes_count +=
- fs->super->s_inodes_per_group;
- 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);
- retval = ext2fs_allocate_group_table(fs, i, 0);
- if (retval) goto errout;
+ ext2fs_reserve_super_and_bgd(fs, i, fs->block_map);
+ ext2fs_reserve_super_and_bgd(fs, i, merged_map);
- group_block += fs->super->s_blocks_per_group;
+ retval = ext2fs_allocate_group_table2(fs, i, merged_map,
+ EXT2FS_ALLOC_TABLE_SET_BLOCK_BITMAP);
+ if (retval)
+ goto errout;
}
- retval = 0;
-
- /*
- * Mark all of the metadata blocks as reserved so they won't
- * get allocated by the call to ext2fs_allocate_group_table()
- * in blocks_to_move(), where we allocate new blocks to
- * replace those allocation bitmap and inode table blocks
- * which have to get relocated to make space for an increased
- * number of the block group descriptors.
- */
- if (reserve_blocks)
- mark_table_blocks(fs, reserve_blocks);
errout:
- return (retval);
+ if (merged_map)
+ ext2fs_free_block_bitmap(merged_map);
+ return retval;
}
-/*
- * This routine adjusts the superblock and other data structures, both
- * in disk as well as in memory...
- */
-static errcode_t adjust_superblock(ext2_resize_t rfs, blk64_t new_size)
+/* Initialize inode tables in new block groups. */
+static errcode_t init_new_itables(ext2_resize_t rfs)
{
- ext2_filsys fs = rfs->new_fs;
- int adj = 0;
errcode_t retval;
- blk64_t group_block;
+ ext2_filsys old_fs = rfs->old_fs, fs = rfs->new_fs;
+ dgrp_t max_group, adj;
unsigned long i;
- unsigned long max_group;
-
- ext2fs_mark_super_dirty(fs);
- ext2fs_mark_bb_dirty(fs);
- ext2fs_mark_ib_dirty(fs);
-
- retval = ext2fs_allocate_block_bitmap(fs, _("reserved blocks"),
- &rfs->reserve_blocks);
- if (retval)
- return retval;
-
- retval = adjust_fs_info(fs, rfs->old_fs, rfs->reserve_blocks, new_size);
- if (retval)
- goto errout;
-
- /*
- * Check to make sure there are enough inodes
- */
- if ((rfs->old_fs->super->s_inodes_count -
- rfs->old_fs->super->s_free_inodes_count) >
- rfs->new_fs->super->s_inodes_count) {
- retval = ENOSPC;
- goto errout;
- }
-
- /*
- * If we are not increasing the number block groups, we're done and
- * can exit now.
- */
- if (rfs->old_fs->group_desc_count >= fs->group_desc_count) {
- retval = 0;
- goto errout;
- }
/*
* If we are using uninit_bg (aka GDT_CSUM) and the kernel
@@ -700,18 +600,7 @@ static errcode_t adjust_superblock(ext2_resize_t rfs, blk64_t new_size)
goto errout;
}
- /*
- * Initialize the inode table
- */
- retval = ext2fs_get_array(fs->blocksize, fs->inode_blocks_per_group,
- &rfs->itable_buf);
- if (retval)
- goto errout;
-
- memset(rfs->itable_buf, 0, fs->blocksize * fs->inode_blocks_per_group);
- group_block = ext2fs_group_first_block2(fs,
- rfs->old_fs->group_desc_count);
- adj = rfs->old_fs->group_desc_count;
+ adj = old_fs->group_desc_count;
max_group = fs->group_desc_count - adj;
if (rfs->progress) {
retval = rfs->progress(rfs, E2_RSZ_EXTEND_ITABLE_PASS,
@@ -719,8 +608,7 @@ static errcode_t adjust_superblock(ext2_resize_t rfs, blk64_t new_size)
if (retval)
goto errout;
}
- for (i = rfs->old_fs->group_desc_count;
- i < fs->group_desc_count; i++) {
+ for (i = old_fs->group_desc_count; i < fs->group_desc_count; i++) {
/*
* Write out the new inode table
*/
@@ -737,1320 +625,320 @@ static errcode_t adjust_superblock(ext2_resize_t rfs, blk64_t new_size)
if (retval)
goto errout;
}
- group_block += fs->super->s_blocks_per_group;
}
io_channel_flush(fs->io);
retval = 0;
-
errout:
- return retval;
-}
-
-/* --------------------------------------------------------------------
- *
- * Resize processing, phase 2.
- *
- * In this phase we adjust determine which blocks need to be moved, in
- * blocks_to_move(). We then copy the blocks to their ultimate new
- * destinations using block_mover(). Since we are copying blocks to
- * their new locations, again during this pass we can abort without
- * any problems.
- * --------------------------------------------------------------------
- */
-
-/*
- * This helper function creates a block bitmap with all of the
- * filesystem meta-data blocks.
- */
-static errcode_t mark_table_blocks(ext2_filsys fs,
- ext2fs_block_bitmap bmap)
-{
- dgrp_t i;
- blk64_t blk;
-
- for (i = 0; i < fs->group_desc_count; i++) {
- ext2fs_reserve_super_and_bgd(fs, i, bmap);
-
- /*
- * Mark the blocks used for the inode table
- */
- blk = ext2fs_inode_table_loc(fs, i);
- if (blk)
- ext2fs_mark_block_bitmap_range2(bmap, blk,
- fs->inode_blocks_per_group);
-
- /*
- * Mark block used for the block bitmap
- */
- blk = ext2fs_block_bitmap_loc(fs, i);
- if (blk)
- ext2fs_mark_block_bitmap2(bmap, blk);
-
- /*
- * Mark block used for the inode bitmap
- */
- blk = ext2fs_inode_bitmap_loc(fs, i);
- if (blk)
- ext2fs_mark_block_bitmap2(bmap, blk);
- }
- return 0;
-}
-
-/*
- * This function checks to see if a particular block (either a
- * superblock or a block group descriptor) overlaps with an inode or
- * block bitmap block, or with the inode table.
- */
-static void mark_fs_metablock(ext2_resize_t rfs,
- ext2fs_block_bitmap meta_bmap,
- int group, blk64_t blk)
-{
- ext2_filsys fs = rfs->new_fs;
-
- ext2fs_mark_block_bitmap2(rfs->reserve_blocks, blk);
- ext2fs_block_alloc_stats2(fs, blk, +1);
-
- /*
- * Check to see if we overlap with the inode or block bitmap,
- * or the inode tables. If not, and the block is in use, then
- * mark it as a block to be moved.
- */
- if (IS_BLOCK_BM(fs, group, blk)) {
- ext2fs_block_bitmap_loc_set(fs, group, 0);
- rfs->needed_blocks++;
- return;
- }
- if (IS_INODE_BM(fs, group, blk)) {
- ext2fs_inode_bitmap_loc_set(fs, group, 0);
- rfs->needed_blocks++;
- return;
- }
- if (IS_INODE_TB(fs, group, blk)) {
- ext2fs_inode_table_loc_set(fs, group, 0);
- rfs->needed_blocks++;
- return;
- }
- if (fs->super->s_feature_incompat & EXT4_FEATURE_INCOMPAT_FLEX_BG) {
- dgrp_t i;
-
- for (i=0; i < rfs->old_fs->group_desc_count; i++) {
- if (IS_BLOCK_BM(fs, i, blk)) {
- ext2fs_block_bitmap_loc_set(fs, i, 0);
- rfs->needed_blocks++;
- return;
- }
- if (IS_INODE_BM(fs, i, blk)) {
- ext2fs_inode_bitmap_loc_set(fs, i, 0);
- rfs->needed_blocks++;
- return;
- }
- if (IS_INODE_TB(fs, i, blk)) {
- ext2fs_inode_table_loc_set(fs, i, 0);
- rfs->needed_blocks++;
- return;
- }
- }
- }
- if (ext2fs_has_group_desc_csum(fs) &&
- (ext2fs_bg_flags_test(fs, group, EXT2_BG_BLOCK_UNINIT))) {
- /*
- * If the block bitmap is uninitialized, which means
- * nothing other than standard metadata in use.
- */
- return;
- } else if (ext2fs_test_block_bitmap2(rfs->old_fs->block_map, blk) &&
- !ext2fs_test_block_bitmap2(meta_bmap, blk)) {
- ext2fs_mark_block_bitmap2(rfs->move_blocks, blk);
- rfs->needed_blocks++;
- }
+ return retval;
}
-
/*
- * This routine marks and unmarks reserved blocks in the new block
- * bitmap. It also determines which blocks need to be moved and
- * places this information into the move_blocks bitmap.
+ * This routine is shared by the online and offline resize routines.
+ * All of the information which is adjusted in memory is done here.
*/
-static errcode_t blocks_to_move(ext2_resize_t rfs)
+errcode_t adjust_fs_info(ext2_filsys fs, ext2_filsys old_fs, blk64_t new_size)
{
- int j, has_super;
- dgrp_t i, max_groups, g;
- blk64_t blk, group_blk;
- blk64_t old_blocks, new_blocks, group_end, cluster_freed;
- blk64_t new_size;
- unsigned int meta_bg, meta_bg_size;
errcode_t retval;
- ext2_filsys fs, old_fs;
- ext2fs_block_bitmap meta_bmap, new_meta_bmap = NULL;
- int flex_bg;
-
- fs = rfs->new_fs;
- old_fs = rfs->old_fs;
- if (ext2fs_blocks_count(old_fs->super) > ext2fs_blocks_count(fs->super))
- fs = rfs->old_fs;
-
- retval = ext2fs_allocate_block_bitmap(fs, _("blocks to be moved"),
- &rfs->move_blocks);
- if (retval)
- return retval;
-
- retval = ext2fs_allocate_block_bitmap(fs, _("meta-data blocks"),
- &meta_bmap);
- if (retval)
- return retval;
-
- retval = mark_table_blocks(old_fs, meta_bmap);
- if (retval)
- return retval;
-
- fs = rfs->new_fs;
-
- /*
- * If we're shrinking the filesystem, we need to move any
- * group's metadata blocks (either allocation bitmaps or the
- * inode table) which are beyond the end of the new
- * filesystem.
- */
- new_size = ext2fs_blocks_count(fs->super);
- if (new_size < ext2fs_blocks_count(old_fs->super)) {
- for (g = 0; g < fs->group_desc_count; g++) {
- int realloc = 0;
- /*
- * ext2fs_allocate_group_table will re-allocate any
- * metadata blocks whose location is set to zero.
- */
- if (ext2fs_block_bitmap_loc(fs, g) >= new_size) {
- ext2fs_block_bitmap_loc_set(fs, g, 0);
- realloc = 1;
- }
- if (ext2fs_inode_bitmap_loc(fs, g) >= new_size) {
- ext2fs_inode_bitmap_loc_set(fs, g, 0);
- realloc = 1;
- }
- if ((ext2fs_inode_table_loc(fs, g) +
- fs->inode_blocks_per_group) > new_size) {
- ext2fs_inode_table_loc_set(fs, g, 0);
- realloc = 1;
- }
-
- if (realloc) {
- retval = ext2fs_allocate_group_table(fs, g, 0);
- if (retval)
- return retval;
- }
- }
- }
-
- /*
- * If we're shrinking the filesystem, we need to move all of
- * the blocks that don't fit any more
- */
- for (blk = ext2fs_blocks_count(fs->super);
- blk < ext2fs_blocks_count(old_fs->super); blk++) {
- g = ext2fs_group_of_blk2(fs, blk);
- if (ext2fs_has_group_desc_csum(fs) &&
- ext2fs_bg_flags_test(old_fs, g, EXT2_BG_BLOCK_UNINIT)) {
- /*
- * The block bitmap is uninitialized, so skip
- * to the next block group.
- */
- blk = ext2fs_group_first_block2(fs, g+1) - 1;
- continue;
- }
- 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);
- }
-
- if (old_fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG)
- old_blocks = old_fs->super->s_first_meta_bg;
- else
- old_blocks = old_fs->desc_blocks +
- old_fs->super->s_reserved_gdt_blocks;
- if (fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG)
- new_blocks = fs->super->s_first_meta_bg;
- else
- new_blocks = fs->desc_blocks + fs->super->s_reserved_gdt_blocks;
-
- retval = reserve_sparse_super2_last_group(rfs, meta_bmap);
- if (retval)
- goto errout;
+ blk64_t blk, group_block;
+ blk64_t real_end;
+ unsigned long i;
+ double percent;
- if (old_blocks == new_blocks) {
- retval = 0;
- goto errout;
- }
+ ext2fs_blocks_count_set(fs->super, new_size);
+ fs->group_desc_count = ext2fs_div64_ceil(new_size -
+ fs->super->s_first_data_block,
+ EXT2_BLOCKS_PER_GROUP(fs->super));
+ fs->desc_blocks = ext2fs_div_ceil(fs->group_desc_count,
+ EXT2_DESC_PER_BLOCK(fs->super));
+ fs->super->s_inodes_count = fs->super->s_inodes_per_group *
+ fs->group_desc_count;
- max_groups = fs->group_desc_count;
- if (max_groups > old_fs->group_desc_count)
- max_groups = old_fs->group_desc_count;
- group_blk = old_fs->super->s_first_data_block;
/*
- * If we're reducing the number of descriptor blocks, this
- * makes life easy. :-) We just have to mark some extra
- * blocks as free.
+ * Don't update free blocks count. That gets recalculated when we are
+ * done.
*/
- if (old_blocks > new_blocks) {
- if (EXT2FS_CLUSTER_RATIO(fs) > 1) {
- retval = ext2fs_allocate_block_bitmap(fs,
- _("new meta blocks"),
- &new_meta_bmap);
- if (retval)
- goto errout;
-
- retval = mark_table_blocks(fs, new_meta_bmap);
- if (retval)
- goto errout;
- }
-
- for (i = 0; i < max_groups; i++) {
- if (!ext2fs_bg_has_super(old_fs, i)) {
- group_blk += fs->super->s_blocks_per_group;
- continue;
- }
- group_end = group_blk + 1 + old_blocks;
- for (blk = group_blk + 1 + new_blocks;
- blk < group_end;) {
- if (new_meta_bmap == NULL ||
- !ext2fs_test_block_bitmap2(new_meta_bmap,
- blk)) {
- cluster_freed =
- EXT2FS_CLUSTER_RATIO(fs) -
- (blk &
- EXT2FS_CLUSTER_MASK(fs));
- if (cluster_freed > group_end - blk)
- cluster_freed = group_end - blk;
- ext2fs_block_alloc_stats2(fs, blk, -1);
- blk += EXT2FS_CLUSTER_RATIO(fs);
- rfs->needed_blocks -= cluster_freed;
- continue;
- }
- rfs->needed_blocks--;
- blk++;
- }
- group_blk += fs->super->s_blocks_per_group;
- }
- retval = 0;
- goto errout;
- }
- /*
- * If we're increasing the number of descriptor blocks, life
- * gets interesting....
- */
- meta_bg_size = EXT2_DESC_PER_BLOCK(fs->super);
- flex_bg = fs->super->s_feature_incompat &
- EXT4_FEATURE_INCOMPAT_FLEX_BG;
- /* first reserve all of the existing fs meta blocks */
- for (i = 0; i < max_groups; i++) {
- has_super = ext2fs_bg_has_super(fs, i);
- if (has_super)
- mark_fs_metablock(rfs, meta_bmap, i, group_blk);
-
- meta_bg = i / meta_bg_size;
- if (!(fs->super->s_feature_incompat &
- EXT2_FEATURE_INCOMPAT_META_BG) ||
- (meta_bg < fs->super->s_first_meta_bg)) {
- if (has_super) {
- for (blk = group_blk+1;
- blk < group_blk + 1 + new_blocks; blk++)
- mark_fs_metablock(rfs, meta_bmap,
- i, blk);
- }
- } else {
- if (has_super)
- has_super = 1;
- if (((i % meta_bg_size) == 0) ||
- ((i % meta_bg_size) == 1) ||
- ((i % meta_bg_size) == (meta_bg_size-1)))
- mark_fs_metablock(rfs, meta_bmap, i,
- group_blk + has_super);
- }
-
- /*
- * Reserve the existing meta blocks that we know
- * aren't to be moved.
- *
- * For flex_bg file systems, in order to avoid
- * overwriting fs metadata (especially inode table
- * blocks) belonging to a different block group when
- * we are relocating the inode tables, we need to
- * reserve all existing fs metadata blocks.
- */
- if (ext2fs_block_bitmap_loc(fs, i))
- ext2fs_mark_block_bitmap2(rfs->reserve_blocks,
- ext2fs_block_bitmap_loc(fs, i));
- else if (flex_bg && i < old_fs->group_desc_count)
- ext2fs_mark_block_bitmap2(rfs->reserve_blocks,
- ext2fs_block_bitmap_loc(old_fs, i));
-
- if (ext2fs_inode_bitmap_loc(fs, i))
- ext2fs_mark_block_bitmap2(rfs->reserve_blocks,
- ext2fs_inode_bitmap_loc(fs, i));
- else if (flex_bg && i < old_fs->group_desc_count)
- ext2fs_mark_block_bitmap2(rfs->reserve_blocks,
- ext2fs_inode_bitmap_loc(old_fs, i));
-
- if (ext2fs_inode_table_loc(fs, i))
- ext2fs_mark_block_bitmap_range2(rfs->reserve_blocks,
- ext2fs_inode_table_loc(fs, i),
- fs->inode_blocks_per_group);
- else if (flex_bg && i < old_fs->group_desc_count)
- ext2fs_mark_block_bitmap_range2(rfs->reserve_blocks,
- ext2fs_inode_table_loc(old_fs, i),
- old_fs->inode_blocks_per_group);
-
- group_blk += rfs->new_fs->super->s_blocks_per_group;
- }
-
- /* Allocate the missing data structures */
- for (i = 0; i < max_groups; i++) {
- if (ext2fs_inode_table_loc(fs, i) &&
- ext2fs_inode_bitmap_loc(fs, i) &&
- ext2fs_block_bitmap_loc(fs, i))
- continue;
-
- retval = ext2fs_allocate_group_table2(fs, i,
- rfs->reserve_blocks,
- EXT2FS_ALLOC_TABLE_UPDATE_STATS |
- EXT2FS_ALLOC_TABLE_SET_BLOCK_BITMAP);
- if (retval)
- goto errout;
-
- /*
- * For those structures that have changed, we need to
- * do bookkeepping.
- */
- if (ext2fs_block_bitmap_loc(old_fs, i) !=
- (blk = ext2fs_block_bitmap_loc(fs, 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);
- }
- if (ext2fs_inode_bitmap_loc(old_fs, i) !=
- (blk = ext2fs_inode_bitmap_loc(fs, 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);
- }
-
- /*
- * The inode table, if we need to relocate it, is
- * handled specially. We have to reserve the blocks
- * for both the old and the new inode table, since we
- * can't have the inode table be destroyed during the
- * block relocation phase.
- */
- if (ext2fs_inode_table_loc(fs, i) == ext2fs_inode_table_loc(old_fs, i))
- continue; /* inode table not moved */
-
- rfs->needed_blocks += fs->inode_blocks_per_group;
-
- /*
- * Mark the new inode table as in use in the new block
- * allocation bitmap, and move any blocks that might
- * be necessary.
- */
- for (blk = ext2fs_inode_table_loc(fs, i), j=0;
- j < fs->inode_blocks_per_group ; j++, blk++) {
- 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);
- }
-
- /*
- * Make sure the old inode table is reserved in the
- * block reservation bitmap.
- */
- for (blk = ext2fs_inode_table_loc(rfs->old_fs, i), j=0;
- j < fs->inode_blocks_per_group ; j++, blk++)
- ext2fs_mark_block_bitmap2(rfs->reserve_blocks, blk);
- }
- retval = 0;
-
-errout:
- if (new_meta_bmap)
- ext2fs_free_block_bitmap(new_meta_bmap);
- if (meta_bmap)
- ext2fs_free_block_bitmap(meta_bmap);
-
- return retval;
-}
-
-/*
- * This helper function tries to allocate a new block. We try to
- * avoid hitting the original group descriptor blocks at least at
- * first, since we want to make it possible to recover from a badly
- * aborted resize operation as much as possible.
- *
- * In the future, I may further modify this routine to balance out
- * where we get the new blocks across the various block groups.
- * Ideally we would allocate blocks that corresponded with the block
- * group of the containing inode, and keep contiguous blocks
- * together. However, this very difficult to do efficiently, since we
- * don't have the necessary information up front.
- */
-
-#define AVOID_OLD 1
-#define DESPERATION 2
-
-static void init_block_alloc(ext2_resize_t rfs)
-{
- rfs->alloc_state = AVOID_OLD;
- rfs->new_blk = rfs->new_fs->super->s_first_data_block;
-#if 0
- /* HACK for testing */
- if (ext2fs_blocks_count(rfs->new_fs->super) >
- ext2fs_blocks_count(rfs->old_fs->super))
- rfs->new_blk = ext2fs_blocks_count(rfs->old_fs->super);
-#endif
-}
-
-static blk64_t get_new_block(ext2_resize_t rfs)
-{
- ext2_filsys fs = rfs->new_fs;
-
- while (1) {
- if (rfs->new_blk >= ext2fs_blocks_count(fs->super)) {
- if (rfs->alloc_state == DESPERATION)
- return 0;
-
-#ifdef RESIZE2FS_DEBUG
- if (rfs->flags & RESIZE_DEBUG_BMOVE)
- printf("Going into desperation mode "
- "for block allocations\n");
-#endif
- rfs->alloc_state = DESPERATION;
- rfs->new_blk = fs->super->s_first_data_block;
- continue;
- }
- if (ext2fs_test_block_bitmap2(fs->block_map, rfs->new_blk) ||
- ext2fs_test_block_bitmap2(rfs->reserve_blocks,
- rfs->new_blk) ||
- ((rfs->alloc_state == AVOID_OLD) &&
- (rfs->new_blk < ext2fs_blocks_count(rfs->old_fs->super)) &&
- ext2fs_test_block_bitmap2(rfs->old_fs->block_map,
- rfs->new_blk))) {
- rfs->new_blk++;
- continue;
- }
- return rfs->new_blk;
- }
-}
-
-static errcode_t resize2fs_get_alloc_block(ext2_filsys fs, blk64_t goal,
- blk64_t *ret)
-{
- ext2_resize_t rfs = (ext2_resize_t) fs->priv_data;
- blk64_t blk;
-
- blk = get_new_block(rfs);
- if (!blk)
- return ENOSPC;
-
-#ifdef RESIZE2FS_DEBUG
- if (rfs->flags & 0xF)
- printf("get_alloc_block allocating %llu\n", blk);
-#endif
-
- ext2fs_mark_block_bitmap2(rfs->old_fs->block_map, blk);
- ext2fs_mark_block_bitmap2(rfs->new_fs->block_map, blk);
- *ret = (blk64_t) blk;
- return 0;
-}
-
-static errcode_t block_mover(ext2_resize_t rfs)
-{
- blk64_t blk, old_blk, new_blk;
- ext2_filsys fs = rfs->new_fs;
- ext2_filsys old_fs = rfs->old_fs;
- errcode_t retval;
- __u64 size;
- int c;
- int to_move, moved;
- ext2_badblocks_list badblock_list = 0;
- int bb_modified = 0;
-
- fs->get_alloc_block = resize2fs_get_alloc_block;
- old_fs->get_alloc_block = resize2fs_get_alloc_block;
-
- retval = ext2fs_read_bb_inode(old_fs, &badblock_list);
- if (retval)
- return retval;
-
- new_blk = fs->super->s_first_data_block;
- if (!rfs->itable_buf) {
- retval = ext2fs_get_array(fs->blocksize,
- fs->inode_blocks_per_group,
- &rfs->itable_buf);
- if (retval)
- return retval;
- }
- retval = ext2fs_create_extent_table(&rfs->bmap, 0);
- if (retval)
- return retval;
/*
- * The first step is to figure out where all of the blocks
- * will go.
+ * Adjust the number of reserved blocks
*/
- to_move = moved = 0;
- init_block_alloc(rfs);
- for (blk = B2C(old_fs->super->s_first_data_block);
- blk < ext2fs_blocks_count(old_fs->super);
- blk += EXT2FS_CLUSTER_RATIO(fs)) {
- if (!ext2fs_test_block_bitmap2(old_fs->block_map, blk))
- continue;
- if (!ext2fs_test_block_bitmap2(rfs->move_blocks, blk))
- continue;
- if (ext2fs_badblocks_list_test(badblock_list, blk)) {
- ext2fs_badblocks_list_del(badblock_list, blk);
- bb_modified++;
- continue;
- }
-
- new_blk = get_new_block(rfs);
- if (!new_blk) {
- retval = ENOSPC;
- goto errout;
- }
- ext2fs_block_alloc_stats2(fs, new_blk, +1);
- ext2fs_add_extent_entry(rfs->bmap, B2C(blk), B2C(new_blk));
- to_move++;
- }
-
- if (to_move == 0) {
- if (rfs->bmap) {
- ext2fs_free_extent_table(rfs->bmap);
- rfs->bmap = 0;
- }
- retval = 0;
- goto errout;
- }
+ percent = (ext2fs_r_blocks_count(old_fs->super) * 100.0) /
+ ext2fs_blocks_count(old_fs->super);
+ ext2fs_r_blocks_count_set(fs->super,
+ (percent * ext2fs_blocks_count(fs->super) /
+ 100.0));
/*
- * Step two is to actually move the blocks
+ * Adjust the bitmaps for size
*/
- retval = ext2fs_iterate_extent(rfs->bmap, 0, 0, 0);
+ retval = ext2fs_resize_inode_bitmap2(fs->super->s_inodes_count,
+ fs->super->s_inodes_count,
+ fs->inode_map);
if (retval) goto errout;
- if (rfs->progress) {
- retval = (rfs->progress)(rfs, E2_RSZ_BLOCK_RELOC_PASS,
- 0, to_move);
- if (retval)
- goto errout;
- }
- while (1) {
- retval = ext2fs_iterate_extent(rfs->bmap, &old_blk, &new_blk, &size);
- if (retval) goto errout;
- if (!size)
- break;
- old_blk = C2B(old_blk);
- new_blk = C2B(new_blk);
- size = C2B(size);
-#ifdef RESIZE2FS_DEBUG
- if (rfs->flags & RESIZE_DEBUG_BMOVE)
- printf("Moving %llu blocks %llu->%llu\n",
- size, old_blk, new_blk);
-#endif
- do {
- c = size;
- if (c > fs->inode_blocks_per_group)
- c = fs->inode_blocks_per_group;
- retval = io_channel_read_blk64(fs->io, old_blk, c,
- rfs->itable_buf);
- if (retval) goto errout;
- retval = io_channel_write_blk64(fs->io, new_blk, c,
- rfs->itable_buf);
- if (retval) goto errout;
- size -= c;
- new_blk += c;
- old_blk += c;
- moved += c;
- if (rfs->progress) {
- io_channel_flush(fs->io);
- retval = (rfs->progress)(rfs,
- E2_RSZ_BLOCK_RELOC_PASS,
- moved, to_move);
- if (retval)
- goto errout;
- }
- } while (size > 0);
- io_channel_flush(fs->io);
- }
-
-errout:
- if (badblock_list) {
- if (!retval && bb_modified)
- retval = ext2fs_update_bb_inode(old_fs,
- badblock_list);
- ext2fs_badblocks_list_free(badblock_list);
- }
- return retval;
-}
-
-
-/* --------------------------------------------------------------------
- *
- * Resize processing, phase 3
- *
- * --------------------------------------------------------------------
- */
-
-
-/*
- * The extent translation table is stored in clusters so we need to
- * take special care when mapping a source block number to its
- * destination block number.
- */
-static __u64 extent_translate(ext2_filsys fs, ext2_extent extent, __u64 old_loc)
-{
- __u64 new_block = C2B(ext2fs_extent_translate(extent, B2C(old_loc)));
-
- if (new_block != 0)
- new_block += old_loc & (EXT2FS_CLUSTER_RATIO(fs) - 1);
- return new_block;
-}
-
-struct process_block_struct {
- ext2_resize_t rfs;
- ext2_ino_t ino;
- ext2_ino_t old_ino;
- struct ext2_inode * inode;
- errcode_t error;
- int is_dir;
- int changed;
- int has_extents;
-};
-
-static int process_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 process_block_struct *pb;
- errcode_t retval;
- blk64_t block, new_block;
- int ret = 0;
-
- pb = (struct process_block_struct *) priv_data;
- block = *block_nr;
- if (pb->rfs->bmap) {
- new_block = extent_translate(fs, pb->rfs->bmap, block);
- if (new_block) {
- *block_nr = new_block;
- ret |= BLOCK_CHANGED;
- pb->changed = 1;
-#ifdef RESIZE2FS_DEBUG
- if (pb->rfs->flags & RESIZE_DEBUG_BMOVE)
- printf("ino=%u, blockcnt=%lld, %llu->%llu\n",
- pb->old_ino, blockcnt, block,
- new_block);
-#endif
- block = new_block;
- }
- }
-
- if (pb->is_dir) {
- retval = ext2fs_add_dir_block2(fs->dblist, pb->ino,
- block, (int) blockcnt);
- if (retval) {
- pb->error = retval;
- ret |= BLOCK_ABORT;
- }
- }
- return ret;
-}
-
-/*
- * Progress callback
- */
-static errcode_t progress_callback(ext2_filsys fs,
- ext2_inode_scan scan EXT2FS_ATTR((unused)),
- dgrp_t group, void * priv_data)
-{
- ext2_resize_t rfs = (ext2_resize_t) priv_data;
- errcode_t retval;
+ real_end = EXT2_GROUPS_TO_BLOCKS(fs->super, fs->group_desc_count) - 1 +
+ fs->super->s_first_data_block;
+ retval = ext2fs_resize_block_bitmap2(new_size - 1,
+ real_end, fs->block_map);
+ if (retval) goto errout;
/*
- * This check is to protect against old ext2 libraries. It
- * shouldn't be needed against new libraries.
+ * Reallocate the group descriptors as necessary.
*/
- if ((group+1) == 0)
- return 0;
-
- if (rfs->progress) {
- io_channel_flush(fs->io);
- retval = (rfs->progress)(rfs, E2_RSZ_INODE_SCAN_PASS,
- group+1, fs->group_desc_count);
- if (retval)
- return retval;
- }
-
- return 0;
-}
-
-static errcode_t migrate_ea_block(ext2_resize_t rfs, ext2_ino_t ino,
- struct ext2_inode *inode, int *changed)
-{
- char *buf = NULL;
- blk64_t new_block;
- errcode_t err = 0;
-
- /* No EA block or no remapping? Quit early. */
- if (ext2fs_file_acl_block(rfs->old_fs, inode) == 0 && !rfs->bmap)
- return 0;
- new_block = extent_translate(rfs->old_fs, rfs->bmap,
- ext2fs_file_acl_block(rfs->old_fs, inode));
- if (new_block == 0)
- return 0;
-
- /* Set the new ACL block */
- ext2fs_file_acl_block_set(rfs->old_fs, inode, new_block);
-
- /* Update checksum */
- if (EXT2_HAS_RO_COMPAT_FEATURE(rfs->new_fs->super,
- EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
- err = ext2fs_get_mem(rfs->old_fs->blocksize, &buf);
- if (err)
- return err;
- rfs->old_fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
- err = ext2fs_read_ext_attr3(rfs->old_fs, new_block, buf, ino);
- rfs->old_fs->flags &= ~EXT2_FLAG_IGNORE_CSUM_ERRORS;
- if (err)
- goto out;
- err = ext2fs_write_ext_attr3(rfs->old_fs, new_block, buf, ino);
- if (err)
- goto out;
- }
- *changed = 1;
-
-out:
- ext2fs_free_mem(&buf);
- return err;
-}
-
-/* Rewrite extents */
-static errcode_t rewrite_extents(ext2_filsys fs, ext2_ino_t ino)
-{
- ext2_extent_handle_t handle;
- struct ext2fs_extent extent;
- errcode_t errcode;
- struct ext2_extent_info info;
-
- errcode = ext2fs_extent_open(fs, ino, &handle);
- if (errcode)
- return errcode;
-
- errcode = ext2fs_extent_get(handle, EXT2_EXTENT_ROOT, &extent);
- if (errcode)
- goto out;
-
- do {
- errcode = ext2fs_extent_get_info(handle, &info);
- if (errcode)
- break;
-
- /*
- * If this is the first extent in an extent block that we
- * haven't visited, rewrite the extent to force the ETB
- * checksum to be rewritten.
- */
- if (info.curr_entry == 1 && info.curr_level != 0 &&
- !(extent.e_flags & EXT2_EXTENT_FLAGS_SECOND_VISIT)) {
- errcode = ext2fs_extent_replace(handle, 0, &extent);
- if (errcode)
- break;
- }
-
- /* Skip to the end of a block of leaf nodes */
- if (extent.e_flags & EXT2_EXTENT_FLAGS_LEAF) {
- errcode = ext2fs_extent_get(handle,
- EXT2_EXTENT_LAST_SIB,
- &extent);
- if (errcode)
- break;
- }
-
- errcode = ext2fs_extent_get(handle, EXT2_EXTENT_NEXT, &extent);
- } while (errcode == 0);
-
-out:
- /* Ok if we run off the end */
- if (errcode == EXT2_ET_EXTENT_NO_NEXT)
- errcode = 0;
- ext2fs_extent_free(handle);
- return errcode;
-}
-
-static void quiet_com_err_proc(const char *whoami, errcode_t code,
- const char *fmt, va_list args)
-{
-}
-
-static errcode_t inode_scan_and_fix(ext2_resize_t rfs)
-{
- struct process_block_struct pb;
- ext2_ino_t ino, new_inode;
- struct ext2_inode *inode = NULL;
- ext2_inode_scan scan = NULL;
- errcode_t retval;
- char *block_buf = 0;
- ext2_ino_t start_to_move;
- int inode_size;
-
- if ((rfs->old_fs->group_desc_count <=
- rfs->new_fs->group_desc_count) &&
- !rfs->bmap)
- return 0;
-
- set_com_err_hook(quiet_com_err_proc);
-
- retval = ext2fs_open_inode_scan(rfs->old_fs, 0, &scan);
- if (retval) goto errout;
-
- retval = ext2fs_init_dblist(rfs->old_fs, 0);
- if (retval) goto errout;
- retval = ext2fs_get_array(rfs->old_fs->blocksize, 3, &block_buf);
- if (retval) goto errout;
-
- start_to_move = (rfs->new_fs->group_desc_count *
- rfs->new_fs->super->s_inodes_per_group);
-
- if (rfs->progress) {
- retval = (rfs->progress)(rfs, E2_RSZ_INODE_SCAN_PASS,
- 0, rfs->old_fs->group_desc_count);
+ if (old_fs->desc_blocks != fs->desc_blocks) {
+ retval = ext2fs_resize_mem(old_fs->desc_blocks *
+ fs->blocksize,
+ fs->desc_blocks * fs->blocksize,
+ &fs->group_desc);
if (retval)
goto errout;
+ if (fs->desc_blocks > old_fs->desc_blocks)
+ memset((char *) fs->group_desc +
+ (old_fs->desc_blocks * fs->blocksize), 0,
+ (fs->desc_blocks - old_fs->desc_blocks) *
+ fs->blocksize);
}
- ext2fs_set_inode_callback(scan, progress_callback, (void *) rfs);
- pb.rfs = rfs;
- pb.inode = inode;
- pb.error = 0;
- new_inode = EXT2_FIRST_INODE(rfs->new_fs->super);
- inode_size = EXT2_INODE_SIZE(rfs->new_fs->super);
- inode = malloc(inode_size);
- if (!inode) {
- retval = ENOMEM;
- goto errout;
- }
+
/*
- * First, copy all of the inodes that need to be moved
- * elsewhere in the inode table
+ * If the resize_inode feature is set, and we are changing the
+ * number of descriptor blocks, then adjust
+ * s_reserved_gdt_blocks if possible to avoid needing to move
+ * the inode table either now or in the future.
*/
- while (1) {
- retval = ext2fs_get_next_inode_full(scan, &ino, inode, inode_size);
- if (retval) goto errout;
- if (!ino)
- break;
-
- if (inode->i_links_count == 0 && ino != EXT2_RESIZE_INO)
- continue; /* inode not in use */
-
- pb.is_dir = LINUX_S_ISDIR(inode->i_mode);
- pb.changed = 0;
-
- /* Remap EA block */
- retval = migrate_ea_block(rfs, ino, inode, &pb.changed);
- if (retval)
- goto errout;
-
- new_inode = ino;
- if (ino <= start_to_move)
- goto remap_blocks; /* Don't need to move inode. */
-
- /*
- * Find a new inode. Now that extents and directory blocks
- * are tied to the inode number through the checksum, we must
- * set up the new inode before we start rewriting blocks.
- */
- retval = ext2fs_new_inode(rfs->new_fs, 0, 0, 0, &new_inode);
- if (retval)
- goto errout;
-
- ext2fs_inode_alloc_stats2(rfs->new_fs, new_inode, +1,
- pb.is_dir);
- inode->i_ctime = time(0);
- retval = ext2fs_write_inode_full(rfs->old_fs, new_inode,
- inode, inode_size);
- if (retval)
- goto errout;
- pb.changed = 0;
-
-#ifdef RESIZE2FS_DEBUG
- if (rfs->flags & RESIZE_DEBUG_INODEMAP)
- printf("Inode moved %u->%u\n", ino, new_inode);
-#endif
- if (!rfs->imap) {
- retval = ext2fs_create_extent_table(&rfs->imap, 0);
- if (retval)
- goto errout;
- }
- ext2fs_add_extent_entry(rfs->imap, ino, new_inode);
+ adjust_reserved_gdt_blocks(old_fs, fs);
-remap_blocks:
- if (pb.changed)
- retval = ext2fs_write_inode_full(rfs->old_fs,
- new_inode,
- inode, inode_size);
- if (retval)
- goto errout;
+ if ((fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG) &&
+ (fs->super->s_first_meta_bg > fs->desc_blocks)) {
+ fs->super->s_feature_incompat &=
+ ~EXT2_FEATURE_INCOMPAT_META_BG;
+ fs->super->s_first_meta_bg = 0;
+ }
- /* Rewrite extent block checksums with new inode number */
- if (EXT2_HAS_RO_COMPAT_FEATURE(rfs->old_fs->super,
- EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) &&
- (inode->i_flags & EXT4_EXTENTS_FL)) {
- rfs->old_fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
- retval = rewrite_extents(rfs->old_fs, new_inode);
- rfs->old_fs->flags &= ~EXT2_FLAG_IGNORE_CSUM_ERRORS;
- if (retval)
- goto errout;
- }
+ /*
+ * 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;
- /*
- * Update inodes to point to new blocks; schedule directory
- * blocks for inode remapping. Need to write out dir blocks
- * with new inode numbers if we have metadata_csum enabled.
- */
- if (ext2fs_inode_has_valid_blocks2(rfs->old_fs, inode) &&
- (rfs->bmap || pb.is_dir)) {
- pb.ino = new_inode;
- pb.old_ino = ino;
- pb.has_extents = inode->i_flags & EXT4_EXTENTS_FL;
- rfs->old_fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
- retval = ext2fs_block_iterate3(rfs->old_fs,
- new_inode, 0, block_buf,
- process_block, &pb);
- rfs->old_fs->flags &= ~EXT2_FLAG_IGNORE_CSUM_ERRORS;
- if (retval)
- goto errout;
- if (pb.error) {
- retval = pb.error;
- goto errout;
- }
- } else if ((inode->i_flags & EXT4_INLINE_DATA_FL) &&
- (rfs->bmap || pb.is_dir)) {
- /* inline data dir; update it too */
- retval = ext2fs_add_dir_block2(rfs->old_fs->dblist,
- new_inode, 0, 0);
- if (retval)
- goto errout;
+ /* For shrinking we already did this in prepare_shrink() */
+ 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;
}
}
- io_channel_flush(rfs->old_fs->io);
errout:
- reset_com_err_hook();
- if (rfs->bmap) {
- ext2fs_free_extent_table(rfs->bmap);
- rfs->bmap = 0;
- }
- if (scan)
- ext2fs_close_inode_scan(scan);
- if (block_buf)
- ext2fs_free_mem(&block_buf);
- free(inode);
return retval;
}
-/* --------------------------------------------------------------------
- *
- * Resize processing, phase 4.
- *
- * --------------------------------------------------------------------
+/*
+ * This helper function creates a block bitmap with all of the
+ * filesystem meta-data blocks.
*/
-
-struct istruct {
- ext2_resize_t rfs;
- errcode_t err;
- unsigned int max_dirs;
- unsigned int num;
-};
-
-static int check_and_change_inodes(ext2_ino_t dir,
- int entry EXT2FS_ATTR((unused)),
- struct ext2_dir_entry *dirent, int offset,
- int blocksize EXT2FS_ATTR((unused)),
- char *buf EXT2FS_ATTR((unused)),
- void *priv_data)
+static errcode_t mark_table_blocks(ext2_filsys fs,
+ ext2fs_block_bitmap bmap)
{
- struct istruct *is = (struct istruct *) priv_data;
- struct ext2_inode inode;
- ext2_ino_t new_inode;
- errcode_t retval;
- int ret = 0;
-
- if (is->rfs->progress && offset == 0) {
- io_channel_flush(is->rfs->old_fs->io);
- is->err = (is->rfs->progress)(is->rfs,
- E2_RSZ_INODE_REF_UPD_PASS,
- ++is->num, is->max_dirs);
- if (is->err)
- return DIRENT_ABORT;
- }
-
- /*
- * If we have checksums enabled and the inode wasn't present in the
- * old fs, then we must rewrite all dir blocks with new checksums.
- */
- if (EXT2_HAS_RO_COMPAT_FEATURE(is->rfs->old_fs->super,
- EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) &&
- !ext2fs_test_inode_bitmap2(is->rfs->old_fs->inode_map, dir))
- ret |= DIRENT_CHANGED;
-
- if (!dirent->inode)
- return ret;
+ dgrp_t i;
+ blk64_t blk;
- new_inode = ext2fs_extent_translate(is->rfs->imap, dirent->inode);
+ for (i = 0; i < fs->group_desc_count; i++) {
+ ext2fs_reserve_super_and_bgd(fs, i, bmap);
- if (!new_inode)
- return ret;
-#ifdef RESIZE2FS_DEBUG
- if (is->rfs->flags & RESIZE_DEBUG_INODEMAP)
- printf("Inode translate (dir=%u, name=%.*s, %u->%u)\n",
- dir, ext2fs_dirent_name_len(dirent), dirent->name,
- dirent->inode, new_inode);
-#endif
+ /*
+ * Mark the blocks used for the inode table
+ */
+ blk = ext2fs_inode_table_loc(fs, i);
+ if (blk)
+ ext2fs_mark_block_bitmap_range2(bmap, blk,
+ fs->inode_blocks_per_group);
- dirent->inode = new_inode;
+ /*
+ * Mark block used for the block bitmap
+ */
+ blk = ext2fs_block_bitmap_loc(fs, i);
+ if (blk)
+ ext2fs_mark_block_bitmap2(bmap, blk);
- /* Update the directory mtime and ctime */
- retval = ext2fs_read_inode(is->rfs->old_fs, dir, &inode);
- if (retval == 0) {
- inode.i_mtime = inode.i_ctime = time(0);
- is->err = ext2fs_write_inode(is->rfs->old_fs, dir, &inode);
- if (is->err)
- return ret | DIRENT_ABORT;
+ /*
+ * Mark block used for the inode bitmap
+ */
+ blk = ext2fs_inode_bitmap_loc(fs, i);
+ if (blk)
+ ext2fs_mark_block_bitmap2(bmap, blk);
}
-
- return ret | DIRENT_CHANGED;
+ return 0;
}
-static errcode_t inode_ref_fix(ext2_resize_t rfs)
+/*
+ * Free group descriptor blocks that aren't needed anymore when fs is shrunk
+ */
+static errcode_t free_gd_blocks(ext2_resize_t rfs)
{
- errcode_t retval;
- struct istruct is;
+ errcode_t retval = 0;
+ ext2_filsys fs = rfs->new_fs, old_fs = rfs->old_fs;
+ blk64_t old_blocks, new_blocks, group_end, cluster_freed;
+ ext2fs_block_bitmap new_meta_bmap = NULL;
+ blk64_t blk, group_blk;
+ dgrp_t i;
- if (!rfs->imap)
+ if (old_fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG)
+ old_blocks = old_fs->super->s_first_meta_bg;
+ else
+ old_blocks = old_fs->desc_blocks +
+ old_fs->super->s_reserved_gdt_blocks;
+ if (fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG)
+ new_blocks = fs->super->s_first_meta_bg;
+ else
+ new_blocks = fs->desc_blocks + fs->super->s_reserved_gdt_blocks;
+
+ if (old_blocks == new_blocks)
return 0;
- /*
- * Now, we iterate over all of the directories to update the
- * inode references
- */
- is.num = 0;
- is.max_dirs = ext2fs_dblist_count2(rfs->old_fs->dblist);
- is.rfs = rfs;
- is.err = 0;
+ if (new_blocks > old_blocks) {
+ fprintf(stderr, "%s: Called when growing filesystem (%llu > "
+ "%llu)!\n", __func__, (unsigned long long)new_blocks,
+ (unsigned long long)old_blocks);
+ exit(1);
+ }
- if (rfs->progress) {
- retval = (rfs->progress)(rfs, E2_RSZ_INODE_REF_UPD_PASS,
- 0, is.max_dirs);
+ if (EXT2FS_CLUSTER_RATIO(fs) > 1) {
+ retval = ext2fs_allocate_block_bitmap(fs,
+ _("new meta blocks"),
+ &new_meta_bmap);
if (retval)
goto errout;
- }
- rfs->old_fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
- retval = ext2fs_dblist_dir_iterate(rfs->old_fs->dblist,
- DIRENT_FLAG_INCLUDE_EMPTY, 0,
- check_and_change_inodes, &is);
- rfs->old_fs->flags &= ~EXT2_FLAG_IGNORE_CSUM_ERRORS;
- if (retval)
- goto errout;
- if (is.err) {
- retval = is.err;
- goto errout;
+ retval = mark_table_blocks(fs, new_meta_bmap);
+ if (retval)
+ goto errout;
}
- if (rfs->progress && (is.num < is.max_dirs))
- (rfs->progress)(rfs, E2_RSZ_INODE_REF_UPD_PASS,
- is.max_dirs, is.max_dirs);
-
+ group_blk = fs->super->s_first_data_block;
+ for (i = 0; i < fs->group_desc_count; i++) {
+ if (!ext2fs_bg_has_super(fs, i)) {
+ group_blk += fs->super->s_blocks_per_group;
+ continue;
+ }
+ group_end = group_blk + 1 + old_blocks;
+ for (blk = group_blk + 1 + new_blocks; blk < group_end;) {
+ if (new_meta_bmap == NULL ||
+ !ext2fs_test_block_bitmap2(new_meta_bmap,
+ blk)) {
+ cluster_freed =
+ EXT2FS_CLUSTER_RATIO(fs) -
+ (blk &
+ EXT2FS_CLUSTER_MASK(fs));
+ if (cluster_freed > group_end - blk)
+ cluster_freed = group_end - blk;
+ ext2fs_block_alloc_stats2(fs, blk, -1);
+ blk += EXT2FS_CLUSTER_RATIO(fs);
+ continue;
+ }
+ blk++;
+ }
+ group_blk += fs->super->s_blocks_per_group;
+ }
errout:
- ext2fs_free_extent_table(rfs->imap);
- rfs->imap = 0;
return retval;
}
-
-/* --------------------------------------------------------------------
- *
- * Resize processing, phase 5.
- *
- * In this phase we actually move the inode table around, and then
- * update the summary statistics. This is scary, since aborting here
- * will potentially scramble the filesystem. (We are moving the
- * inode tables around in place, and so the potential for lost data,
- * or at the very least scrambling the mapping between filenames and
- * inode numbers is very high in case of a power failure here.)
- * --------------------------------------------------------------------
- */
-
-
/*
- * A very scary routine --- this one moves the inode table around!!!
- *
- * After this you have to use the rfs->new_fs file handle to read and
- * write inodes.
+ * Identify blocks that need moving to make space for new group descriptors,
+ * move them, and mark them as used.
*/
-static errcode_t move_itables(ext2_resize_t rfs)
+static errcode_t make_space_for_gd(ext2_resize_t rfs)
{
- int n, num, size;
- long long diff;
- dgrp_t i, max_groups;
- ext2_filsys fs = rfs->new_fs;
- char *cp;
- blk64_t old_blk, new_blk, blk, cluster_freed;
+ int j, has_super;
+ dgrp_t i;
+ blk64_t blk, group_blk;
+ blk64_t old_blocks, new_blocks;
+ unsigned int meta_bg, meta_bg_size;
errcode_t retval;
- int j, to_move, moved;
- ext2fs_block_bitmap new_bmap = NULL;
+ ext2_filsys fs = rfs->new_fs, old_fs = rfs->old_fs;
+ ext2fs_block_bitmap move_blocks;
+
+ retval = ext2fs_allocate_block_bitmap(fs, _("blocks to be moved"),
+ &move_blocks);
+ if (retval)
+ return retval;
- max_groups = fs->group_desc_count;
- if (max_groups > rfs->old_fs->group_desc_count)
- max_groups = rfs->old_fs->group_desc_count;
+ if (old_fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG)
+ old_blocks = old_fs->super->s_first_meta_bg;
+ else
+ old_blocks = old_fs->desc_blocks +
+ old_fs->super->s_reserved_gdt_blocks;
+ if (fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG)
+ new_blocks = fs->super->s_first_meta_bg;
+ else
+ new_blocks = fs->desc_blocks + fs->super->s_reserved_gdt_blocks;
- size = fs->blocksize * fs->inode_blocks_per_group;
- if (!rfs->itable_buf) {
- retval = ext2fs_get_mem(size, &rfs->itable_buf);
- if (retval)
- return retval;
+ if (old_blocks == new_blocks) {
+ retval = 0;
+ goto errout;
}
- if (EXT2FS_CLUSTER_RATIO(fs) > 1) {
- retval = ext2fs_allocate_block_bitmap(fs, _("new meta blocks"),
- &new_bmap);
- if (retval)
- return retval;
-
- retval = mark_table_blocks(fs, new_bmap);
- if (retval)
- goto errout;
+ if (new_blocks < old_blocks) {
+ fprintf(stderr, "%s: Called when shrinking filesystem (%llu < "
+ "%llu)!\n", __func__, (unsigned long long)new_blocks,
+ (unsigned long long)old_blocks);
+ exit(1);
}
+ meta_bg_size = EXT2_DESC_PER_BLOCK(fs->super);
/*
- * Figure out how many inode tables we need to move
+ * Mark space for new descriptor blocks as needing moving. We need to
+ * handle only groups with old style group descriptor blocks - for
+ * groups using META_BG the number of group descriptor blocks doesn't
+ * change.
*/
- to_move = moved = 0;
- for (i=0; i < max_groups; i++)
- if (ext2fs_inode_table_loc(rfs->old_fs, i) !=
- ext2fs_inode_table_loc(fs, i))
- to_move++;
+ group_blk = old_fs->super->s_first_data_block;
+ for (i = 0; i < old_fs->group_desc_count;
+ i++, group_blk += fs->super->s_blocks_per_group) {
+ if (!ext2fs_bg_has_super(fs, i))
+ continue;
- if (to_move == 0) {
- retval = 0;
- goto errout;
- }
+ meta_bg = i / meta_bg_size;
+ if (fs->super->s_feature_incompat &
+ EXT2_FEATURE_INCOMPAT_META_BG &&
+ meta_bg >= fs->super->s_first_meta_bg)
+ break;
- if (rfs->progress) {
- retval = rfs->progress(rfs, E2_RSZ_MOVE_ITABLE_PASS,
- 0, to_move);
- if (retval)
- goto errout;
+ ext2fs_mark_block_bitmap_range2(move_blocks,
+ group_blk + old_blocks + 1,
+ new_blocks - old_blocks);
}
- rfs->old_fs->flags |= EXT2_FLAG_MASTER_SB_ONLY;
-
- for (i=0; i < max_groups; i++) {
- old_blk = ext2fs_inode_table_loc(rfs->old_fs, i);
- new_blk = ext2fs_inode_table_loc(fs, i);
- diff = new_blk - old_blk;
-
-#ifdef RESIZE2FS_DEBUG
- if (rfs->flags & RESIZE_DEBUG_ITABLEMOVE)
- printf("Itable move group %d block %llu->%llu (diff %lld)\n",
- i, old_blk, new_blk, diff);
-#endif
+ retval = ext2fs_move_blocks(fs, move_blocks, NULL);
+ if (retval)
+ goto errout;
- if (!diff)
+ /* Blocks for group descriptors are unused now, mark them as used */
+ group_blk = old_fs->super->s_first_data_block;
+ for (i = 0; i < old_fs->group_desc_count;
+ i++, group_blk += fs->super->s_blocks_per_group) {
+ if (!ext2fs_bg_has_super(fs, i))
continue;
- if (diff < 0)
- diff = 0;
-
- retval = io_channel_read_blk64(fs->io, old_blk,
- fs->inode_blocks_per_group,
- rfs->itable_buf);
- if (retval)
- goto errout;
- /*
- * The end of the inode table segment often contains
- * all zeros, and we're often only moving the inode
- * table down a block or two. If so, we can optimize
- * things by not rewriting blocks that we know to be zero
- * already.
- */
- for (cp = rfs->itable_buf+size-1, n=0; n < size; n++, cp--)
- if (*cp)
- break;
- n = n >> EXT2_BLOCK_SIZE_BITS(fs->super);
-#ifdef RESIZE2FS_DEBUG
- if (rfs->flags & RESIZE_DEBUG_ITABLEMOVE)
- printf("%d blocks of zeros...\n", n);
-#endif
- num = fs->inode_blocks_per_group;
- if (n > diff)
- num -= n;
-
- retval = io_channel_write_blk64(fs->io, new_blk,
- num, rfs->itable_buf);
- if (retval) {
- io_channel_write_blk64(fs->io, old_blk,
- num, rfs->itable_buf);
- goto errout;
- }
- if (n > diff) {
- retval = io_channel_write_blk64(fs->io,
- old_blk + fs->inode_blocks_per_group,
- diff, (rfs->itable_buf +
- (fs->inode_blocks_per_group - diff) *
- fs->blocksize));
- if (retval)
- goto errout;
- }
-
- for (blk = ext2fs_inode_table_loc(rfs->old_fs, i), j=0;
- j < fs->inode_blocks_per_group;) {
- if (new_bmap == NULL ||
- !ext2fs_test_block_bitmap2(new_bmap, blk)) {
- ext2fs_block_alloc_stats2(fs, blk, -1);
- cluster_freed = EXT2FS_CLUSTER_RATIO(fs) -
- (blk & EXT2FS_CLUSTER_MASK(fs));
- blk += cluster_freed;
- j += cluster_freed;
- continue;
- }
- blk++;
- j++;
- }
- ext2fs_inode_table_loc_set(rfs->old_fs, i, new_blk);
- ext2fs_group_desc_csum_set(rfs->old_fs, i);
- ext2fs_mark_super_dirty(rfs->old_fs);
- ext2fs_flush(rfs->old_fs);
+ meta_bg = i / meta_bg_size;
+ if (fs->super->s_feature_incompat &
+ EXT2_FEATURE_INCOMPAT_META_BG &&
+ meta_bg >= fs->super->s_first_meta_bg)
+ break;
- if (rfs->progress) {
- retval = rfs->progress(rfs, E2_RSZ_MOVE_ITABLE_PASS,
- ++moved, to_move);
- if (retval)
- goto errout;
- }
+ ext2fs_mark_block_bitmap_range2(fs->block_map,
+ group_blk + old_blocks + 1,
+ new_blocks - old_blocks);
}
- mark_table_blocks(fs, fs->block_map);
- ext2fs_flush(fs);
-#ifdef RESIZE2FS_DEBUG
- if (rfs->flags & RESIZE_DEBUG_ITABLEMOVE)
- printf("Inode table move finished.\n");
-#endif
- retval = 0;
-
errout:
- if (new_bmap)
- ext2fs_free_block_bitmap(new_bmap);
+ if (move_blocks)
+ ext2fs_free_block_bitmap(move_blocks);
return retval;
}
@@ -2100,102 +988,6 @@ static errcode_t clear_sparse_super2_last_group(ext2_resize_t rfs)
}
/*
- * 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 (last_bg && !sb) {
- fputs(_("Should never happen! No sb in last super_sparse bg?\n"),
- stderr);
- exit(1);
- }
- if (old_desc && 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)
@@ -2320,33 +1112,6 @@ static errcode_t ext2fs_calculate_summary_stats(ext2_filsys fs)
return 0;
}
-/*
- * Journal may have been relocated; update the backup journal blocks
- * in the superblock.
- */
-static errcode_t fix_sb_journal_backup(ext2_filsys fs)
-{
- errcode_t retval;
- struct ext2_inode inode;
-
- if (!(fs->super->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL))
- return 0;
-
- /* External journal? Nothing to do. */
- if (fs->super->s_journal_dev && !fs->super->s_journal_inum)
- return 0;
-
- retval = ext2fs_read_inode(fs, fs->super->s_journal_inum, &inode);
- if (retval)
- return retval;
- memcpy(fs->super->s_jnl_blocks, inode.i_block, EXT2_N_BLOCKS*4);
- fs->super->s_jnl_blocks[15] = inode.i_size_high;
- fs->super->s_jnl_blocks[16] = inode.i_size;
- fs->super->s_jnl_backup_type = EXT3_JNL_BACKUP_BLOCKS;
- ext2fs_mark_super_dirty(fs);
- return 0;
-}
-
static int calc_group_overhead(ext2_filsys fs, blk64_t grp,
int old_desc_blocks)
{
diff --git a/resize/resize2fs.h b/resize/resize2fs.h
index c53b3bee8c8d..c5d9c92c58ca 100644
--- a/resize/resize2fs.h
+++ b/resize/resize2fs.h
@@ -107,19 +107,7 @@ typedef struct ext2_resize_struct *ext2_resize_t;
struct ext2_resize_struct {
ext2_filsys old_fs;
ext2_filsys new_fs;
- ext2fs_block_bitmap reserve_blocks;
- ext2fs_block_bitmap move_blocks;
- ext2_extent bmap;
- ext2_extent imap;
- blk64_t needed_blocks;
int flags;
- char *itable_buf;
-
- /*
- * For the block allocator
- */
- blk64_t new_blk;
- int alloc_state;
/*
* For the progress meter
@@ -146,9 +134,10 @@ extern errcode_t resize_fs(ext2_filsys fs, blk64_t *new_size, int flags,
int pass, unsigned long cur,
unsigned long max));
+extern errcode_t validate_fs_size(ext2_filsys fs, blk64_t *new_sizep);
extern errcode_t adjust_fs_info(ext2_filsys fs, ext2_filsys old_fs,
- ext2fs_block_bitmap reserve_blocks,
blk64_t new_size);
+extern errcode_t alloc_new_groups(ext2_filsys fs, dgrp_t from);
extern blk64_t calculate_minimum_resize_size(ext2_filsys fs, int flags);
--
2.1.4
--
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