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Date: Tue, 17 Jun 2008 02:06:30 -0400
From: Theodore Ts'o <tytso@....edu>
To: linux-ext4@...r.kernel.org
Cc: Theodore Ts'o <tytso@....edu>
Subject: [PATCH] resize2fs: Fix support for the uninit_bg feature
Signed-off-by: "Theodore Ts'o" <tytso@....edu>
---
resize/main.c | 6 ----
resize/resize2fs.c | 83 ++++++++++++++++++++++++++++++++++++++++-----------
2 files changed, 65 insertions(+), 24 deletions(-)
diff --git a/resize/main.c b/resize/main.c
index e26cd8b..d7097ad 100644
--- a/resize/main.c
+++ b/resize/main.c
@@ -307,12 +307,6 @@ int main (int argc, char ** argv)
exit (1);
}
- if (fs->super->s_feature_ro_compat & EXT4_FEATURE_RO_COMPAT_GDT_CSUM) {
- com_err(program_name, EXT2_ET_RO_UNSUPP_FEATURE,
- ":- uninit_bg");
- exit(1);
- }
-
/*
* Check for compatibility with the feature sets. We need to
* be more stringent than ext2fs_open().
diff --git a/resize/resize2fs.c b/resize/resize2fs.c
index 2d53873..027315c 100644
--- a/resize/resize2fs.c
+++ b/resize/resize2fs.c
@@ -188,7 +188,7 @@ errcode_t adjust_fs_info(ext2_filsys fs, ext2_filsys old_fs, blk_t new_size)
int adj, old_numblocks, numblocks, adjblocks;
unsigned long i, j, old_desc_blocks, max_group;
unsigned int meta_bg, meta_bg_size;
- int has_super;
+ int has_super, csum_flag;
unsigned long long new_inodes; /* u64 to check for overflow */
fs->super->s_blocks_count = new_size;
@@ -359,6 +359,8 @@ retry:
group_block = fs->super->s_first_data_block +
old_fs->group_desc_count * fs->super->s_blocks_per_group;
+ csum_flag = EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
+ EXT4_FEATURE_RO_COMPAT_GDT_CSUM);
adj = old_fs->group_desc_count;
max_group = fs->group_desc_count - adj;
if (fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG)
@@ -372,18 +374,26 @@ retry:
sizeof(struct ext2_group_desc));
adjblocks = 0;
+ fs->group_desc[i].bg_flags = 0;
+ if (csum_flag)
+ fs->group_desc[i].bg_flags |= EXT2_BG_INODE_UNINIT |
+ EXT2_BG_INODE_ZEROED;
if (i == fs->group_desc_count-1) {
numblocks = (fs->super->s_blocks_count -
fs->super->s_first_data_block) %
fs->super->s_blocks_per_group;
if (!numblocks)
numblocks = fs->super->s_blocks_per_group;
- } else
+ } else {
numblocks = fs->super->s_blocks_per_group;
+ if (csum_flag)
+ fs->group_desc[i].bg_flags |=
+ EXT2_BG_BLOCK_UNINIT;
+ }
has_super = ext2fs_bg_has_super(fs, i);
if (has_super) {
- ext2fs_mark_block_bitmap(fs->block_map, group_block);
+ ext2fs_block_alloc_stats(fs, group_block, +1);
adjblocks++;
}
meta_bg_size = EXT2_DESC_PER_BLOCK(fs->super);
@@ -393,8 +403,8 @@ retry:
(meta_bg < fs->super->s_first_meta_bg)) {
if (has_super) {
for (j=0; j < old_desc_blocks; j++)
- ext2fs_mark_block_bitmap(fs->block_map,
- group_block + 1 + j);
+ ext2fs_block_alloc_stats(fs,
+ group_block + 1 + j, +1);
adjblocks += old_desc_blocks;
}
} else {
@@ -403,8 +413,8 @@ retry:
if (((i % meta_bg_size) == 0) ||
((i % meta_bg_size) == 1) ||
((i % meta_bg_size) == (meta_bg_size-1)))
- ext2fs_mark_block_bitmap(fs->block_map,
- group_block + has_super);
+ ext2fs_block_alloc_stats(fs,
+ group_block + has_super, +1);
}
adjblocks += 2 + fs->inode_blocks_per_group;
@@ -597,7 +607,7 @@ static void mark_fs_metablock(ext2_resize_t rfs,
ext2_filsys fs = rfs->new_fs;
ext2fs_mark_block_bitmap(rfs->reserve_blocks, blk);
- ext2fs_mark_block_bitmap(fs->block_map, blk);
+ ext2fs_block_alloc_stats(fs, blk, +1);
/*
* Check to see if we overlap with the inode or block bitmap,
@@ -707,8 +717,7 @@ static errcode_t blocks_to_move(ext2_resize_t rfs)
}
for (blk = group_blk+1+new_blocks;
blk < group_blk+1+old_blocks; blk++) {
- ext2fs_unmark_block_bitmap(fs->block_map,
- blk);
+ ext2fs_block_alloc_stats(fs, blk, -1);
rfs->needed_blocks--;
}
group_blk += fs->super->s_blocks_per_group;
@@ -781,7 +790,7 @@ static errcode_t blocks_to_move(ext2_resize_t rfs)
*/
if (FS_BLOCK_BM(old_fs, i) !=
(blk = FS_BLOCK_BM(fs, i))) {
- ext2fs_mark_block_bitmap(fs->block_map, blk);
+ ext2fs_block_alloc_stats(fs, blk, +1);
if (ext2fs_test_block_bitmap(old_fs->block_map, blk) &&
!ext2fs_test_block_bitmap(meta_bmap, blk))
ext2fs_mark_block_bitmap(rfs->move_blocks,
@@ -789,7 +798,7 @@ static errcode_t blocks_to_move(ext2_resize_t rfs)
}
if (FS_INODE_BM(old_fs, i) !=
(blk = FS_INODE_BM(fs, i))) {
- ext2fs_mark_block_bitmap(fs->block_map, blk);
+ ext2fs_block_alloc_stats(fs, blk, +1);
if (ext2fs_test_block_bitmap(old_fs->block_map, blk) &&
!ext2fs_test_block_bitmap(meta_bmap, blk))
ext2fs_mark_block_bitmap(rfs->move_blocks,
@@ -815,7 +824,7 @@ static errcode_t blocks_to_move(ext2_resize_t rfs)
*/
for (blk = fs->group_desc[i].bg_inode_table, j=0;
j < fs->inode_blocks_per_group ; j++, blk++) {
- ext2fs_mark_block_bitmap(fs->block_map, blk);
+ ext2fs_block_alloc_stats(fs, blk, +1);
if (ext2fs_test_block_bitmap(old_fs->block_map, blk) &&
!ext2fs_test_block_bitmap(meta_bmap, blk))
ext2fs_mark_block_bitmap(rfs->move_blocks,
@@ -953,7 +962,7 @@ static errcode_t block_mover(ext2_resize_t rfs)
retval = ENOSPC;
goto errout;
}
- ext2fs_mark_block_bitmap(fs->block_map, new_blk);
+ ext2fs_block_alloc_stats(fs, new_blk, +1);
ext2fs_add_extent_entry(rfs->bmap, blk, new_blk);
to_move++;
}
@@ -1222,7 +1231,8 @@ static errcode_t inode_scan_and_fix(ext2_resize_t rfs)
goto errout;
}
}
- ext2fs_mark_inode_bitmap(rfs->new_fs->inode_map, new_inode);
+ ext2fs_inode_alloc_stats2(rfs->new_fs, new_inode, +1,
+ pb.is_dir);
if (pb.changed) {
/* Get the new version of the inode */
retval = ext2fs_read_inode_full(rfs->old_fs, ino,
@@ -1491,7 +1501,7 @@ static errcode_t move_itables(ext2_resize_t rfs)
for (blk = rfs->old_fs->group_desc[i].bg_inode_table, j=0;
j < fs->inode_blocks_per_group ; j++, blk++)
- ext2fs_unmark_block_bitmap(fs->block_map, blk);
+ ext2fs_block_alloc_stats(fs, blk, -1);
rfs->old_fs->group_desc[i].bg_inode_table = new_blk;
ext2fs_group_desc_csum_set(rfs->old_fs, i);
@@ -1579,13 +1589,35 @@ static errcode_t ext2fs_calculate_summary_stats(ext2_filsys fs)
unsigned int count = 0;
int total_free = 0;
int group_free = 0;
+ int uninit = 0;
+ blk_t super_blk, old_desc_blk, new_desc_blk;
+ int old_desc_blocks;
/*
* First calculate the block statistics
*/
+ uninit = fs->group_desc[group].bg_flags & EXT2_BG_BLOCK_UNINIT;
+ ext2fs_super_and_bgd_loc(fs, group, &super_blk, &old_desc_blk,
+ &new_desc_blk, 0);
+ if (fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG)
+ old_desc_blocks = fs->super->s_first_meta_bg;
+ else
+ old_desc_blocks = fs->desc_blocks +
+ fs->super->s_reserved_gdt_blocks;
for (blk = fs->super->s_first_data_block;
blk < fs->super->s_blocks_count; blk++) {
- if (!ext2fs_fast_test_block_bitmap(fs->block_map, blk)) {
+ if ((uninit &&
+ !((blk == super_blk) ||
+ ((old_desc_blk && old_desc_blocks &&
+ (blk >= old_desc_blk) &&
+ (blk < old_desc_blk + old_desc_blocks))) ||
+ ((new_desc_blk && (blk == new_desc_blk))) ||
+ (blk == fs->group_desc[group].bg_block_bitmap) ||
+ (blk == fs->group_desc[group].bg_inode_bitmap) ||
+ ((blk >= fs->group_desc[group].bg_inode_table &&
+ (blk < fs->group_desc[group].bg_inode_table
+ + fs->inode_blocks_per_group))))) ||
+ (!ext2fs_fast_test_block_bitmap(fs->block_map, blk))) {
group_free++;
total_free++;
}
@@ -1598,6 +1630,17 @@ static errcode_t ext2fs_calculate_summary_stats(ext2_filsys fs)
group++;
count = 0;
group_free = 0;
+ uninit = (fs->group_desc[group].bg_flags &
+ EXT2_BG_BLOCK_UNINIT);
+ ext2fs_super_and_bgd_loc(fs, group, &super_blk,
+ &old_desc_blk,
+ &new_desc_blk, 0);
+ if (fs->super->s_feature_incompat &
+ EXT2_FEATURE_INCOMPAT_META_BG)
+ old_desc_blocks = fs->super->s_first_meta_bg;
+ else
+ old_desc_blocks = fs->desc_blocks +
+ fs->super->s_reserved_gdt_blocks;
}
}
fs->super->s_free_blocks_count = total_free;
@@ -1611,8 +1654,10 @@ static errcode_t ext2fs_calculate_summary_stats(ext2_filsys fs)
group = 0;
/* Protect loop from wrap-around if s_inodes_count maxed */
+ uninit = fs->group_desc[group].bg_flags & EXT2_BG_INODE_UNINIT;
for (ino = 1; ino <= fs->super->s_inodes_count && ino > 0; ino++) {
- if (!ext2fs_fast_test_inode_bitmap(fs->inode_map, ino)) {
+ if (uninit ||
+ !ext2fs_fast_test_inode_bitmap(fs->inode_map, ino)) {
group_free++;
total_free++;
}
@@ -1625,6 +1670,8 @@ static errcode_t ext2fs_calculate_summary_stats(ext2_filsys fs)
group++;
count = 0;
group_free = 0;
+ uninit = (fs->group_desc[group].bg_flags &
+ EXT2_BG_INODE_UNINIT);
}
}
fs->super->s_free_inodes_count = total_free;
--
1.5.6.rc3.1.g36b7.dirty
--
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