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| author | Qu Wenruo <wqu@suse.com> | 2022-11-14 08:26:32 +0800 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2022-12-05 18:00:57 +0100 |
| commit | 97e3823933108cfc648bb08d5ad36251b6588164 (patch) | |
| tree | 47b277d7ca595f2acac299efae1095b5d67a9a9a /fs/btrfs/tree-log.c | |
| parent | cb649e81dad429ffbd97a689ac0011599952a668 (diff) | |
| download | lwn-97e3823933108cfc648bb08d5ad36251b6588164.tar.gz lwn-97e3823933108cfc648bb08d5ad36251b6588164.zip | |
btrfs: introduce a bitmap based csum range search function
Although we have an existing function, btrfs_lookup_csums_range(), to
find all data checksums for a range, it's based on a btrfs_ordered_sum
list.
For the incoming RAID56 data checksum verification at RMW time, we don't
want to waste time by allocating temporary memory.
So this patch will introduce a new helper, btrfs_lookup_csums_bitmap().
It will use bitmap based result, which will be a perfect fit for later
RAID56 usage.
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/tree-log.c')
| -rw-r--r-- | fs/btrfs/tree-log.c | 15 |
1 files changed, 7 insertions, 8 deletions
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c index 4d9f6803bfbe..8f8d7e7dc3a8 100644 --- a/fs/btrfs/tree-log.c +++ b/fs/btrfs/tree-log.c @@ -826,7 +826,7 @@ static noinline int replay_one_extent(struct btrfs_trans_handle *trans, btrfs_file_extent_num_bytes(eb, item); } - ret = btrfs_lookup_csums_range(root->log_root, + ret = btrfs_lookup_csums_list(root->log_root, csum_start, csum_end - 1, &ordered_sums, 0, false); if (ret) @@ -4443,9 +4443,9 @@ static noinline int copy_items(struct btrfs_trans_handle *trans, csum_root = btrfs_csum_root(trans->fs_info, disk_bytenr); disk_bytenr += extent_offset; - ret = btrfs_lookup_csums_range(csum_root, disk_bytenr, - disk_bytenr + extent_num_bytes - 1, - &ordered_sums, 0, false); + ret = btrfs_lookup_csums_list(csum_root, disk_bytenr, + disk_bytenr + extent_num_bytes - 1, + &ordered_sums, 0, false); if (ret) goto out; @@ -4638,10 +4638,9 @@ static int log_extent_csums(struct btrfs_trans_handle *trans, /* block start is already adjusted for the file extent offset. */ csum_root = btrfs_csum_root(trans->fs_info, em->block_start); - ret = btrfs_lookup_csums_range(csum_root, - em->block_start + csum_offset, - em->block_start + csum_offset + - csum_len - 1, &ordered_sums, 0, false); + ret = btrfs_lookup_csums_list(csum_root, em->block_start + csum_offset, + em->block_start + csum_offset + + csum_len - 1, &ordered_sums, 0, false); if (ret) return ret; |