If the previous block group's inode table ends at the very end of file
system, wrap around to the beginning of the flex_bg.
This fixes a bug was tickled by:
mke2fs.conf:
frontload = {
features = extent,huge_file,flex_bg,uninit_bg,dir_nlink,extra_isize,^resize_inode,sparse_super2
hash_alg = half_md4
num_backup_sb = 0
packed_meta_blocks = 1
inode_ratio = 4194304
flex_bg_size = 262144
}
mke2fs -T frontload /tmp/foo.img 2T
resize2fs -M /tmp/foo.img
resize2fs -M /tmp/foo.img
Signed-off-by: "Theodore Ts'o" <tytso@xxxxxxx>
---
lib/ext2fs/alloc_tables.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/lib/ext2fs/alloc_tables.c b/lib/ext2fs/alloc_tables.c
index fec9003..bc99943 100644
--- a/lib/ext2fs/alloc_tables.c
+++ b/lib/ext2fs/alloc_tables.c
@@ -54,8 +54,8 @@ static blk64_t flexbg_offset(ext2_filsys fs, dgrp_t group, blk64_t start_blk,
* Don't do a long search if the previous block
* search is still valid.
*/
- if (start_blk && ext2fs_test_block_bitmap_range2(bmap, start_blk,
- elem_size))
+ if (start_blk && start_blk < ext2fs_blocks_count(fs->super) &&
+ ext2fs_test_block_bitmap_range2(bmap, start_blk, elem_size))
return start_blk;
start_blk = ext2fs_group_first_block2(fs, flexbg_size * flexbg);
--
1.9.0
--
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