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resize2fs: correctly account for clusters when calculating summary stats

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Fixes resize2fs so it correctly calculates the number of free clusters
in each block group for file systems with the bigalloc feature
enabled.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This commit is contained in:
Theodore Ts'o 2013-01-19 23:41:36 -05:00
parent 3e1816b8cc
commit 1773c87c7e
1 changed files with 24 additions and 13 deletions
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35
resize/resize2fs.c
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@ -62,6 +62,15 @@ static errcode_t fix_sb_journal_backup(ext2_filsys fs);
((blk) < (ext2fs_inode_table_loc((fs), (i)) + \
(fs)->inode_blocks_per_group)))
/* Some bigalloc helper macros which are more succint... */
#define B2C(x) EXT2FS_B2C(fs, (x))
#define C2B(x) EXT2FS_C2B(fs, (x))
#define EQ_CLSTR(x, y) (B2C(x) == B2C(y))
#define LE_CLSTR(x, y) (B2C(x) <= B2C(y))
#define LT_CLSTR(x, y) (B2C(x) < B2C(y))
#define GE_CLSTR(x, y) (B2C(x) >= B2C(y))
#define GT_CLSTR(x, y) (B2C(x) > B2C(y))
int lazy_itable_init;
/*
@ -1822,26 +1831,27 @@ static errcode_t ext2fs_calculate_summary_stats(ext2_filsys fs)
else
old_desc_blocks = fs->desc_blocks +
fs->super->s_reserved_gdt_blocks;
for (blk = fs->super->s_first_data_block;
blk < ext2fs_blocks_count(fs->super); blk++) {
for (blk = B2C(fs->super->s_first_data_block);
blk < ext2fs_blocks_count(fs->super);
blk += EXT2FS_CLUSTER_RATIO(fs)) {
if ((uninit &&
!((blk == super_blk) ||
!(EQ_CLSTR(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 == ext2fs_block_bitmap_loc(fs, group)) ||
(blk == ext2fs_inode_bitmap_loc(fs, group)) ||
((blk >= ext2fs_inode_table_loc(fs, group) &&
(blk < ext2fs_inode_table_loc(fs, group)
GE_CLSTR(blk, old_desc_blk) &&
LT_CLSTR(blk, old_desc_blk + old_desc_blocks))) ||
((new_desc_blk && EQ_CLSTR(blk, new_desc_blk))) ||
EQ_CLSTR(blk, ext2fs_block_bitmap_loc(fs, group)) ||
EQ_CLSTR(blk, ext2fs_inode_bitmap_loc(fs, group)) ||
((GE_CLSTR(blk, ext2fs_inode_table_loc(fs, group)) &&
LT_CLSTR(blk, ext2fs_inode_table_loc(fs, group)
+ fs->inode_blocks_per_group))))) ||
(!ext2fs_fast_test_block_bitmap2(fs->block_map, blk))) {
group_free++;
total_blocks_free++;
}
count++;
if ((count == fs->super->s_blocks_per_group) ||
(blk == ext2fs_blocks_count(fs->super)-1)) {
if ((count == fs->super->s_clusters_per_group) ||
EQ_CLSTR(blk, ext2fs_blocks_count(fs->super)-1)) {
ext2fs_bg_free_blocks_count_set(fs, group, group_free);
ext2fs_group_desc_csum_set(fs, group);
group++;
@ -1861,6 +1871,7 @@ static errcode_t ext2fs_calculate_summary_stats(ext2_filsys fs)
fs->super->s_reserved_gdt_blocks;
}
}
total_blocks_free = C2B(total_blocks_free);
ext2fs_free_blocks_count_set(fs->super, total_blocks_free);
/*