btrfs: use bbio->ordered in btrfs_csum_one_bio

Use the ordered_extent pointer in the btrfs_bio instead of looking it
up manually.

Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/file-item.c b/fs/btrfs/file-item.c
index cbacaa8..696bf69 100644 (file)
--- a/fs/btrfs/file-item.c
+++ b/fs/btrfs/file-item.c
@@ -721,13 +721,12 @@ fail:
  */
 blk_status_t btrfs_csum_one_bio(struct btrfs_bio *bbio)
 {
+       struct btrfs_ordered_extent *ordered = bbio->ordered;
        struct btrfs_inode *inode = bbio->inode;
        struct btrfs_fs_info *fs_info = inode->root->fs_info;
        SHASH_DESC_ON_STACK(shash, fs_info->csum_shash);
        struct bio *bio = &bbio->bio;
-       u64 offset = bbio->file_offset;
        struct btrfs_ordered_sum *sums;
-       struct btrfs_ordered_extent *ordered = NULL;
        char *data;
        struct bvec_iter iter;
        struct bio_vec bvec;
@@ -753,22 +752,6 @@ blk_status_t btrfs_csum_one_bio(struct btrfs_bio *bbio)
        shash->tfm = fs_info->csum_shash;
 
        bio_for_each_segment(bvec, bio, iter) {
-               if (!ordered) {
-                       ordered = btrfs_lookup_ordered_extent(inode, offset);
-                       /*
-                        * The bio range is not covered by any ordered extent,
-                        * must be a code logic error.
-                        */
-                       if (unlikely(!ordered)) {
-                               WARN(1, KERN_WARNING
-                       "no ordered extent for root %llu ino %llu offset %llu\n",
-                                    inode->root->root_key.objectid,
-                                    btrfs_ino(inode), offset);
-                               kvfree(sums);
-                               return BLK_STS_IOERR;
-                       }
-               }
-
                blockcount = BTRFS_BYTES_TO_BLKS(fs_info,
                                                 bvec.bv_len + fs_info->sectorsize
                                                 - 1);
@@ -781,14 +764,12 @@ blk_status_t btrfs_csum_one_bio(struct btrfs_bio *bbio)
                                            sums->sums + index);
                        kunmap_local(data);
                        index += fs_info->csum_size;
-                       offset += fs_info->sectorsize;
                }
 
        }
 
        bbio->sums = sums;
        btrfs_add_ordered_sum(ordered, sums);
-       btrfs_put_ordered_extent(ordered);
        return 0;
 }