diff options
Diffstat (limited to 'fs/btrfs/file-item.c')
-rw-r--r-- | fs/btrfs/file-item.c | 35 |
1 files changed, 17 insertions, 18 deletions
diff --git a/fs/btrfs/file-item.c b/fs/btrfs/file-item.c index b1bfdc5c1387..b7f5394c37a1 100644 --- a/fs/btrfs/file-item.c +++ b/fs/btrfs/file-item.c @@ -148,8 +148,21 @@ int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, return ret; } -static blk_status_t __btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, - u64 logical_offset, u8 *dst, int dio) +/** + * btrfs_lookup_bio_sums - Look up checksums for a bio. + * @inode: inode that the bio is for. + * @bio: bio embedded in btrfs_io_bio. + * @at_offset: If true, look up checksums for the extent at @offset. + * If false, use the page offsets from the bio. + * @offset: If @at_offset is true, offset in file to look up checksums for. + * Ignored otherwise. + * @dst: Buffer of size btrfs_super_csum_size() used to return checksum. If + * NULL, the checksum is returned in btrfs_io_bio(bio)->csum instead. + * + * Return: BLK_STS_RESOURCE if allocating memory fails, BLK_STS_OK otherwise. + */ +blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, + bool at_offset, u64 offset, u8 *dst) { struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb); struct bio_vec bvec; @@ -159,7 +172,6 @@ static blk_status_t __btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio struct extent_io_tree *io_tree = &BTRFS_I(inode)->io_tree; struct btrfs_path *path; u8 *csum; - u64 offset = 0; u64 item_start_offset = 0; u64 item_last_offset = 0; u64 disk_bytenr; @@ -205,15 +217,13 @@ static blk_status_t __btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio } disk_bytenr = (u64)bio->bi_iter.bi_sector << 9; - if (dio) - offset = logical_offset; bio_for_each_segment(bvec, bio, iter) { page_bytes_left = bvec.bv_len; if (count) goto next; - if (!dio) + if (!at_offset) offset = page_offset(bvec.bv_page) + bvec.bv_offset; count = btrfs_find_ordered_sum(inode, offset, disk_bytenr, csum, nblocks); @@ -285,18 +295,7 @@ next: WARN_ON_ONCE(count); btrfs_free_path(path); - return 0; -} - -blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, - u8 *dst) -{ - return __btrfs_lookup_bio_sums(inode, bio, 0, dst, 0); -} - -blk_status_t btrfs_lookup_bio_sums_dio(struct inode *inode, struct bio *bio, u64 offset) -{ - return __btrfs_lookup_bio_sums(inode, bio, offset, NULL, 1); + return BLK_STS_OK; } int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end, |