ext4: mark block bitmap corrupted when found

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>

diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index 009dea9..b00481c 100644 (file)
--- a/fs/ext4/balloc.c
+++ b/fs/ext4/balloc.c
@@ -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);

diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index bc2d1eb..0d47399 100644 (file)
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -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