Btrfs: check inconsistence between chunk and block group
With btrfs-corrupt-block, one can drop one chunk item and mounting will end up with a panic in btrfs_full_stripe_len(). This doesn't not remove the BUG_ON, but instead checks it a bit earlier when we find the block group item. Signed-off-by: Liu Bo <bo.li.liu@oracle.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
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@ -9887,7 +9887,22 @@ static int find_first_block_group(struct btrfs_root *root,
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if (found_key.objectid >= key->objectid &&
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if (found_key.objectid >= key->objectid &&
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found_key.type == BTRFS_BLOCK_GROUP_ITEM_KEY) {
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found_key.type == BTRFS_BLOCK_GROUP_ITEM_KEY) {
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struct extent_map_tree *em_tree;
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struct extent_map *em;
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em_tree = &root->fs_info->mapping_tree.map_tree;
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read_lock(&em_tree->lock);
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em = lookup_extent_mapping(em_tree, found_key.objectid,
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found_key.offset);
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read_unlock(&em_tree->lock);
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if (!em) {
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btrfs_err(root->fs_info,
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"logical %llu len %llu found bg but no related chunk",
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found_key.objectid, found_key.offset);
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ret = -ENOENT;
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} else {
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ret = 0;
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ret = 0;
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}
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goto out;
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goto out;
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}
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}
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path->slots[0]++;
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path->slots[0]++;
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