Btrfs: fix scrub_print_warning to handle skinny metadata extents
The skinny extents are intepreted incorrectly in scrub_print_warning(), and end up hitting the BUG() in btrfs_extent_inline_ref_size. Reported-by: Konstantinos Skarlatos <k.skarlatos@gmail.com> Signed-off-by: Liu Bo <bo.li.liu@oracle.com> Signed-off-by: Chris Mason <clm@fb.com>
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@ -1409,9 +1409,10 @@ int extent_from_logical(struct btrfs_fs_info *fs_info, u64 logical,
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* returns <0 on error
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*/
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static int __get_extent_inline_ref(unsigned long *ptr, struct extent_buffer *eb,
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struct btrfs_extent_item *ei, u32 item_size,
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struct btrfs_extent_inline_ref **out_eiref,
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int *out_type)
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struct btrfs_key *key,
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struct btrfs_extent_item *ei, u32 item_size,
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struct btrfs_extent_inline_ref **out_eiref,
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int *out_type)
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{
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unsigned long end;
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u64 flags;
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@ -1421,9 +1422,16 @@ static int __get_extent_inline_ref(unsigned long *ptr, struct extent_buffer *eb,
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/* first call */
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flags = btrfs_extent_flags(eb, ei);
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if (flags & BTRFS_EXTENT_FLAG_TREE_BLOCK) {
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info = (struct btrfs_tree_block_info *)(ei + 1);
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*out_eiref =
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(struct btrfs_extent_inline_ref *)(info + 1);
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if (key->type == BTRFS_METADATA_ITEM_KEY) {
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/* a skinny metadata extent */
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*out_eiref =
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(struct btrfs_extent_inline_ref *)(ei + 1);
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} else {
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WARN_ON(key->type != BTRFS_EXTENT_ITEM_KEY);
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info = (struct btrfs_tree_block_info *)(ei + 1);
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*out_eiref =
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(struct btrfs_extent_inline_ref *)(info + 1);
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}
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} else {
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*out_eiref = (struct btrfs_extent_inline_ref *)(ei + 1);
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}
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@ -1433,7 +1441,7 @@ static int __get_extent_inline_ref(unsigned long *ptr, struct extent_buffer *eb,
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}
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end = (unsigned long)ei + item_size;
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*out_eiref = (struct btrfs_extent_inline_ref *)*ptr;
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*out_eiref = (struct btrfs_extent_inline_ref *)(*ptr);
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*out_type = btrfs_extent_inline_ref_type(eb, *out_eiref);
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*ptr += btrfs_extent_inline_ref_size(*out_type);
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@ -1452,8 +1460,8 @@ static int __get_extent_inline_ref(unsigned long *ptr, struct extent_buffer *eb,
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* <0 on error.
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*/
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int tree_backref_for_extent(unsigned long *ptr, struct extent_buffer *eb,
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struct btrfs_extent_item *ei, u32 item_size,
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u64 *out_root, u8 *out_level)
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struct btrfs_key *key, struct btrfs_extent_item *ei,
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u32 item_size, u64 *out_root, u8 *out_level)
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{
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int ret;
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int type;
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@ -1464,8 +1472,8 @@ int tree_backref_for_extent(unsigned long *ptr, struct extent_buffer *eb,
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return 1;
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while (1) {
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ret = __get_extent_inline_ref(ptr, eb, ei, item_size,
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&eiref, &type);
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ret = __get_extent_inline_ref(ptr, eb, key, ei, item_size,
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&eiref, &type);
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if (ret < 0)
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return ret;
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@ -40,8 +40,8 @@ int extent_from_logical(struct btrfs_fs_info *fs_info, u64 logical,
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u64 *flags);
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int tree_backref_for_extent(unsigned long *ptr, struct extent_buffer *eb,
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struct btrfs_extent_item *ei, u32 item_size,
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u64 *out_root, u8 *out_level);
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struct btrfs_key *key, struct btrfs_extent_item *ei,
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u32 item_size, u64 *out_root, u8 *out_level);
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int iterate_extent_inodes(struct btrfs_fs_info *fs_info,
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u64 extent_item_objectid,
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@ -588,8 +588,9 @@ static void scrub_print_warning(const char *errstr, struct scrub_block *sblock)
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if (flags & BTRFS_EXTENT_FLAG_TREE_BLOCK) {
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do {
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ret = tree_backref_for_extent(&ptr, eb, ei, item_size,
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&ref_root, &ref_level);
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ret = tree_backref_for_extent(&ptr, eb, &found_key, ei,
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item_size, &ref_root,
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&ref_level);
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printk_in_rcu(KERN_WARNING
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"BTRFS: %s at logical %llu on dev %s, "
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"sector %llu: metadata %s (level %d) in tree "
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