diff options
| author | Josef Bacik <josef@toxicpanda.com> | 2020-10-16 11:29:18 -0400 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2020-12-08 15:53:41 +0100 |
| commit | 42437a6386ffeaaf200731e73d723ea491f3fe7d (patch) | |
| tree | d8c5d6ebb854ecdb34e61fe7d9f458656e1713f1 /fs/btrfs/inode.c | |
| parent | 68319c18cb21ab472ce2c4ed572257a42455ac01 (diff) | |
btrfs: introduce mount option rescue=ignorebadroots
In the face of extent root corruption, or any other core fs wide root
corruption we will fail to mount the file system. This makes recovery
kind of a pain, because you need to fall back to userspace tools to
scrape off data. Instead provide a mechanism to gracefully handle bad
roots, so we can at least mount read-only and possibly recover data from
the file system.
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/inode.c')
| -rw-r--r-- | fs/btrfs/inode.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index c8cda5df9fb0..21a354dad6f2 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -2187,7 +2187,8 @@ blk_status_t btrfs_submit_data_bio(struct inode *inode, struct bio *bio, int skip_sum; int async = !atomic_read(&BTRFS_I(inode)->sync_writers); - skip_sum = BTRFS_I(inode)->flags & BTRFS_INODE_NODATASUM; + skip_sum = (BTRFS_I(inode)->flags & BTRFS_INODE_NODATASUM) || + !fs_info->csum_root; if (btrfs_is_free_space_inode(BTRFS_I(inode))) metadata = BTRFS_WQ_ENDIO_FREE_SPACE; @@ -2902,6 +2903,9 @@ int btrfs_verify_data_csum(struct btrfs_io_bio *io_bio, u64 phy_offset, if (BTRFS_I(inode)->flags & BTRFS_INODE_NODATASUM) return 0; + if (!root->fs_info->csum_root) + return 0; + if (root->root_key.objectid == BTRFS_DATA_RELOC_TREE_OBJECTID && test_range_bit(io_tree, start, end, EXTENT_NODATASUM, 1, NULL)) { clear_extent_bits(io_tree, start, end, EXTENT_NODATASUM); |