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ext4: mark block bitmap corrupted when found

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There are still some cases that we missed to set
block bitmaps corrupted bit properly:

1) block bitmap number is wrong.
2) failed to read block bitmap due to disk errors.
3) double free block bitmaps..
4) some mismatch check with bitmaps vs buddy information.

Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Liu Bo <bo.liu@linux.alibaba.com>
Signed-off-by: Wang Shilong <wshilong@ddn.com>
Reviewed-by: Liu Bo <bo.liu@linux.alibaba.com>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
This commit is contained in:
Wang Shilong 2018-05-12 12:37:58 -04:00 committed by Theodore Ts'o
parent 206f6d552d
commit 736dedbb1a
2 changed files with 10 additions and 0 deletions
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4
fs/ext4/balloc.c
View file

@ -421,6 +421,8 @@ ext4_read_block_bitmap_nowait(struct super_block *sb, ext4_group_t block_group)
(bitmap_blk >= ext4_blocks_count(sbi->s_es))) {
ext4_error(sb, "Invalid block bitmap block %llu in "
"block_group %u", bitmap_blk, block_group);
ext4_mark_group_bitmap_corrupted(sb, block_group,
EXT4_GROUP_INFO_BBITMAP_CORRUPT);
return ERR_PTR(-EFSCORRUPTED);
}
bh = sb_getblk(sb, bitmap_blk);
@ -499,6 +501,8 @@ int ext4_wait_block_bitmap(struct super_block *sb, ext4_group_t block_group,
ext4_error(sb, "Cannot read block bitmap - "
"block_group = %u, block_bitmap = %llu",
block_group, (unsigned long long) bh->b_blocknr);
ext4_mark_group_bitmap_corrupted(sb, block_group,
EXT4_GROUP_INFO_BBITMAP_CORRUPT);
return -EIO;
}
clear_buffer_new(bh);

6
fs/ext4/mballoc.c
View file

@ -470,6 +470,8 @@ static void mb_free_blocks_double(struct inode *inode, struct ext4_buddy *e4b,
"freeing block already freed "
"(bit %u)",
first + i);
ext4_mark_group_bitmap_corrupted(sb, e4b->bd_group,
EXT4_GROUP_INFO_BBITMAP_CORRUPT);
}
mb_clear_bit(first + i, e4b->bd_info->bb_bitmap);
}
@ -1950,6 +1952,8 @@ void ext4_mb_complex_scan_group(struct ext4_allocation_context *ac,
"%d free clusters as per "
"group info. But bitmap says 0",
free);
ext4_mark_group_bitmap_corrupted(sb, e4b->bd_group,
EXT4_GROUP_INFO_BBITMAP_CORRUPT);
break;
}
@ -1960,6 +1964,8 @@ void ext4_mb_complex_scan_group(struct ext4_allocation_context *ac,
"%d free clusters as per "
"group info. But got %d blocks",
free, ex.fe_len);
ext4_mark_group_bitmap_corrupted(sb, e4b->bd_group,
EXT4_GROUP_INFO_BBITMAP_CORRUPT);
/*
* The number of free blocks differs. This mostly
* indicate that the bitmap is corrupt. So exit