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| author | Liu Bo <bo.liu@linux.alibaba.com> | 2018-05-18 10:59:35 +0800 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2018-05-30 16:46:43 +0200 |
| commit | ff76a864cc94d055b4239fb2cd13e8e633dc7aac (patch) | |
| tree | 0248b26f1b960a82c18a1f4348124ffa0c9adc3e /fs/btrfs/disk-io.c | |
| parent | 9593bf49675efc5567c9bdb8c51cdb204b6f85b3 (diff) | |
| download | linux-ff76a864cc94d055b4239fb2cd13e8e633dc7aac.tar.gz | |
Btrfs: add parent_transid parameter to veirfy_level_key
As verify_level_key() is checked after verify_parent_transid(), i.e.
if (verify_parent_transid())
ret = -EIO;
else if (verify_level_key())
ret = -EUCLEAN;
if parent_transid is 0, verify_parent_transid() skips verifying
parent_transid and considers eb as valid, and if verify_level_key()
reports something wrong, we're not going to know if it's caused by
corrupted metadata or non-checkecd eb (e.g. stale eb).
The stale eb can be from an outdated raid1 mirror after a degraded
mount, see eg "btrfs: fix reading stale metadata blocks after degraded
raid1 mounts" (02a3307aa9c20b4f66262) for more details.
@parent_transid is able to tell whether the eb's generation has been
verified by the caller.
Signed-off-by: Liu Bo <bo.liu@linux.alibaba.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/disk-io.c')
| -rw-r--r-- | fs/btrfs/disk-io.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index d8d3b73680ef..205092dc9390 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -415,7 +415,7 @@ static int btrfs_check_super_csum(struct btrfs_fs_info *fs_info, static int verify_level_key(struct btrfs_fs_info *fs_info, struct extent_buffer *eb, int level, - struct btrfs_key *first_key) + struct btrfs_key *first_key, u64 parent_transid) { int found_level; struct btrfs_key found_key; @@ -453,10 +453,11 @@ static int verify_level_key(struct btrfs_fs_info *fs_info, if (ret) { WARN_ON(1); btrfs_err(fs_info, -"tree first key mismatch detected, bytenr=%llu key expected=(%llu, %u, %llu) has=(%llu, %u, %llu)", - eb->start, first_key->objectid, first_key->type, - first_key->offset, found_key.objectid, - found_key.type, found_key.offset); +"tree first key mismatch detected, bytenr=%llu parent_transid=%llu key expected=(%llu,%u,%llu) has=(%llu,%u,%llu)", + eb->start, parent_transid, first_key->objectid, + first_key->type, first_key->offset, + found_key.objectid, found_key.type, + found_key.offset); } #endif return ret; @@ -492,7 +493,7 @@ static int btree_read_extent_buffer_pages(struct btrfs_fs_info *fs_info, parent_transid, 0)) ret = -EIO; else if (verify_level_key(fs_info, eb, level, - first_key)) + first_key, parent_transid)) ret = -EUCLEAN; else break; |