diff options
| -rw-r--r-- | fs/ext4/super.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 1f8cb1812723..e38dd7d37a69 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -2405,6 +2405,16 @@ static ext4_fsblk_t descriptor_loc(struct super_block *sb, if (ext4_bg_has_super(sb, bg)) has_super = 1; + /* + * If we have a meta_bg fs with 1k blocks, group 0's GDT is at + * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled + * on modern mke2fs or blksize > 1k on older mke2fs) then we must + * compensate. + */ + if (sb->s_blocksize == 1024 && nr == 0 && + le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block) == 0) + has_super++; + return (has_super + ext4_group_first_block_no(sb, bg)); } |