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| author | Qu Wenruo <wqu@suse.com> | 2024-06-14 13:52:30 +0930 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2024-07-11 15:33:29 +0200 |
| commit | 169aaaf2e0be615ffd4a12adc02db5eb86e8eee1 (patch) | |
| tree | b4dab9d20c51361821c969ad9cfb042709283616 /fs/btrfs/disk-io.c | |
| parent | cf31b271e0a65fadb675a6cec433e08ab636f36d (diff) | |
| download | linux-169aaaf2e0be615ffd4a12adc02db5eb86e8eee1.tar.gz linux-169aaaf2e0be615ffd4a12adc02db5eb86e8eee1.tar.bz2 linux-169aaaf2e0be615ffd4a12adc02db5eb86e8eee1.zip | |
btrfs: introduce new "rescue=ignoremetacsums" mount option
Introduce "rescue=ignoremetacsums" to ignore metadata csums, all the
other metadata sanity checks are still kept as is.
This new mount option is mostly to allow the kernel to mount an
interrupted checksum conversion (at the metadata csum overwrite stage).
And since the main part of metadata sanity checks is inside
tree-checker, we shouldn't lose much safety, and the new mount option is
rescue mount option it requires full read-only mount.
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@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 | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index 686eec119eb4..2cfb7ab24aa9 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -367,6 +367,7 @@ int btrfs_validate_extent_buffer(struct extent_buffer *eb, u8 result[BTRFS_CSUM_SIZE]; const u8 *header_csum; int ret = 0; + const bool ignore_csum = btrfs_test_opt(fs_info, IGNOREMETACSUMS); ASSERT(check); @@ -399,13 +400,16 @@ int btrfs_validate_extent_buffer(struct extent_buffer *eb, if (memcmp(result, header_csum, csum_size) != 0) { btrfs_warn_rl(fs_info, -"checksum verify failed on logical %llu mirror %u wanted " CSUM_FMT " found " CSUM_FMT " level %d", +"checksum verify failed on logical %llu mirror %u wanted " CSUM_FMT " found " CSUM_FMT " level %d%s", eb->start, eb->read_mirror, CSUM_FMT_VALUE(csum_size, header_csum), CSUM_FMT_VALUE(csum_size, result), - btrfs_header_level(eb)); - ret = -EUCLEAN; - goto out; + btrfs_header_level(eb), + ignore_csum ? ", ignored" : ""); + if (!ignore_csum) { + ret = -EUCLEAN; + goto out; + } } if (found_level != check->level) { @@ -2131,7 +2135,7 @@ static int load_global_roots_objectid(struct btrfs_root *tree_root, /* If we have IGNOREDATACSUMS skip loading these roots. */ if (objectid == BTRFS_CSUM_TREE_OBJECTID && btrfs_test_opt(fs_info, IGNOREDATACSUMS)) { - set_bit(BTRFS_FS_STATE_NO_CSUMS, &fs_info->fs_state); + set_bit(BTRFS_FS_STATE_NO_DATA_CSUMS, &fs_info->fs_state); return 0; } @@ -2184,7 +2188,7 @@ static int load_global_roots_objectid(struct btrfs_root *tree_root, if (!found || ret) { if (objectid == BTRFS_CSUM_TREE_OBJECTID) - set_bit(BTRFS_FS_STATE_NO_CSUMS, &fs_info->fs_state); + set_bit(BTRFS_FS_STATE_NO_DATA_CSUMS, &fs_info->fs_state); if (!btrfs_test_opt(fs_info, IGNOREBADROOTS)) ret = ret ? ret : -ENOENT; @@ -2865,6 +2869,8 @@ static int init_mount_fs_info(struct btrfs_fs_info *fs_info, struct super_block if (sb_rdonly(sb)) set_bit(BTRFS_FS_STATE_RO, &fs_info->fs_state); + if (btrfs_test_opt(fs_info, IGNOREMETACSUMS)) + set_bit(BTRFS_FS_STATE_SKIP_META_CSUMS, &fs_info->fs_state); return btrfs_alloc_stripe_hash_table(fs_info); } |