On Thu, Mar 10, 2016 at 11:09 AM, Alex Lyakas <alex.bols...@gmail.com> wrote:
> Signed-off-by: Alex Lyakas <a...@zadarastorage.com>
Reviewed-by: Filipe Manana <fdman...@suse.com>
> ---
> fs/btrfs/disk-io.c | 13 +++++--------
> 1 file changed, 5 insertions(+), 8 deletions(-)
>
> diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
> index 4545e2e..4420ab2 100644
> --- a/fs/btrfs/disk-io.c
> +++ b/fs/btrfs/disk-io.c
> @@ -296,52 +296,52 @@ static int csum_tree_block(struct btrfs_fs_info
> *fs_info,
> unsigned long map_len;
> int err;
> u32 crc = ~(u32)0;
> unsigned long inline_result;
>
> len = buf->len - offset;
> while (len > 0) {
> err = map_private_extent_buffer(buf, offset, 32,
> &kaddr, &map_start, &map_len);
> if (err)
> - return 1;
> + return err;
> cur_len = min(len, map_len - (offset - map_start));
> crc = btrfs_csum_data(kaddr + offset - map_start,
> crc, cur_len);
> len -= cur_len;
> offset += cur_len;
> }
> if (csum_size > sizeof(inline_result)) {
> result = kzalloc(csum_size, GFP_NOFS);
> if (!result)
> - return 1;
> + return -ENOMEM;
> } else {
> result = (char *)&inline_result;
> }
>
> btrfs_csum_final(crc, result);
>
> if (verify) {
> if (memcmp_extent_buffer(buf, result, 0, csum_size)) {
> u32 val;
> u32 found = 0;
> memcpy(&found, result, csum_size);
>
> read_extent_buffer(buf, &val, 0, csum_size);
> btrfs_warn_rl(fs_info,
> "%s checksum verify failed on %llu wanted %X
> found %X "
> "level %d",
> fs_info->sb->s_id, buf->start,
> val, found, btrfs_header_level(buf));
> if (result != (char *)&inline_result)
> kfree(result);
> - return 1;
> + return -EUCLEAN;
> }
> } else {
> write_extent_buffer(buf, result, 0, csum_size);
> }
> if (result != (char *)&inline_result)
> kfree(result);
> return 0;
> }
>
> /*
> @@ -509,22 +509,21 @@ static int csum_dirty_buffer(struct btrfs_fs_info
> *fs_info, struct page *page)
> u64 start = page_offset(page);
> u64 found_start;
> struct extent_buffer *eb;
>
> eb = (struct extent_buffer *)page->private;
> if (page != eb->pages[0])
> return 0;
> found_start = btrfs_header_bytenr(eb);
> if (WARN_ON(found_start != start || !PageUptodate(page)))
> return 0;
> - csum_tree_block(fs_info, eb, 0);
> - return 0;
> + return csum_tree_block(fs_info, eb, 0);
> }
>
> static int check_tree_block_fsid(struct btrfs_fs_info *fs_info,
> struct extent_buffer *eb)
> {
> struct btrfs_fs_devices *fs_devices = fs_info->fs_devices;
> u8 fsid[BTRFS_UUID_SIZE];
> int ret = 1;
>
> read_extent_buffer(eb, fsid, btrfs_header_fsid(), BTRFS_FSID_SIZE);
> @@ -653,24 +652,22 @@ static int btree_readpage_end_io_hook(struct
> btrfs_io_bio *io_bio,
> btrfs_err(root->fs_info, "bad tree block level %d",
> (int)btrfs_header_level(eb));
> ret = -EIO;
> goto err;
> }
>
> btrfs_set_buffer_lockdep_class(btrfs_header_owner(eb),
> eb, found_level);
>
> ret = csum_tree_block(root->fs_info, eb, 1);
> - if (ret) {
> - ret = -EIO;
> + if (ret)
> goto err;
> - }
>
> /*
> * If this is a leaf block and it is corrupt, set the corrupt bit so
> * that we don't try and read the other copies of this block, just
> * return -EIO.
> */
> if (found_level == 0 && check_leaf(root, eb)) {
> set_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags);
> ret = -EIO;
> }
> --
> 1.9.1
>
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