diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c
index 71e5b2e9a1ba..8b3bca269de3 100644
--- a/fs/btrfs/compression.c
+++ b/fs/btrfs/compression.c
@@ -591,7 +591,7 @@ blk_status_t btrfs_submit_compressed_write(struct btrfs_inode *inode, u64 start,
if (submit) {
if (!skip_sum) {
- ret = btrfs_csum_one_bio(inode, bio, start, 1);
+ ret = btrfs_csum_one_bio(inode, bio, start, true);
if (ret)
goto finish_cb;
}
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 89d2ed6c2eb1..aa88dd70ac48 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -3203,7 +3203,7 @@ int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_ordered_sum *sums);
blk_status_t btrfs_csum_one_bio(struct btrfs_inode *inode, struct bio *bio,
- u64 file_start, int contig);
+ u64 offset, bool one_ordered);
int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
struct list_head *list, int search_commit);
void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode,
diff --git a/fs/btrfs/file-item.c b/fs/btrfs/file-item.c
index 9a3de652ada8..2907314a41b4 100644
--- a/fs/btrfs/file-item.c
+++ b/fs/btrfs/file-item.c
@@ -612,32 +612,33 @@ fail:
return ret;
}
-/*
- * btrfs_csum_one_bio - Calculates checksums of the data contained inside a bio
+/**
+ * Calculate checksums of the data contained inside a bio
+ *
* @inode: Owner of the data inside the bio
* @bio: Contains the data to be checksummed
- * @file_start: offset in file this bio begins to describe
- * @contig: Boolean. If true/1 means all bio vecs in this bio are
- * contiguous and they begin at @file_start in the file. False/0
- * means this bio can contain potentially discontiguous bio vecs
- * so the logical offset of each should be calculated separately.
+ * @offset: If (u64)-1, @bio may contain discontiguous bio vecs, so the
+ * file offsets are determined from the page offsets in the bio.
+ * Otherwise, this is the starting file offset of the bio vecs in
+ * @bio, which must be contiguous.
+ * @one_ordered: If true, @bio only refers to one ordered extent.
*/
blk_status_t btrfs_csum_one_bio(struct btrfs_inode *inode, struct bio *bio,
- u64 file_start, int contig)
+ u64 offset, bool one_ordered)
{
struct btrfs_fs_info *fs_info = inode->root->fs_info;
SHASH_DESC_ON_STACK(shash, fs_info->csum_shash);
struct btrfs_ordered_sum *sums;
struct btrfs_ordered_extent *ordered = NULL;
+ const bool use_page_offsets = (offset == (u64)-1);
char *data;
struct bvec_iter iter;
struct bio_vec bvec;
int index;
- int nr_sectors;
+ unsigned int blockcount;
unsigned long total_bytes = 0;
unsigned long this_sum_bytes = 0;
int i;
- u64 offset;
unsigned nofs_flag;
nofs_flag = memalloc_nofs_save();
@@ -651,18 +652,13 @@ blk_status_t btrfs_csum_one_bio(struct btrfs_inode *inode, struct bio *bio,
sums->len = bio->bi_iter.bi_size;
INIT_LIST_HEAD(&sums->list);
- if (contig)
- offset = file_start;
- else
- offset = 0; /* shut up gcc */
-
sums->bytenr = bio->bi_iter.bi_sector << 9;
index = 0;
shash->tfm = fs_info->csum_shash;
bio_for_each_segment(bvec, bio, iter) {
- if (!contig)
+ if (use_page_offsets)
offset = page_offset(bvec.bv_page) + bvec.bv_offset;
if (!ordered) {
@@ -681,13 +677,14 @@ blk_status_t btrfs_csum_one_bio(struct btrfs_inode *inode, struct bio *bio,
}
}
- nr_sectors = BTRFS_BYTES_TO_BLKS(fs_info,
+ blockcount = BTRFS_BYTES_TO_BLKS(fs_info,
bvec.bv_len + fs_info->sectorsize
- 1);
- for (i = 0; i < nr_sectors; i++) {
- if (offset >= ordered->file_offset + ordered->num_bytes ||
- offset < ordered->file_offset) {
+ for (i = 0; i < blockcount; i++) {
+ if (!one_ordered &&
+ !in_range(offset, ordered->file_offset,
+ ordered->num_bytes)) {
unsigned long bytes_left;
sums->len = this_sum_bytes;
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index ffe327090277..26fd111218c7 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -2314,7 +2314,7 @@ void btrfs_clear_delalloc_extent(struct inode *vfs_inode,
static blk_status_t btrfs_submit_bio_start(struct inode *inode, struct bio *bio,
u64 dio_file_offset)
{
- return btrfs_csum_one_bio(BTRFS_I(inode), bio, 0, 0);
+ return btrfs_csum_one_bio(BTRFS_I(inode), bio, (u64)-1, false);
}
/*
@@ -2566,7 +2566,7 @@ blk_status_t btrfs_submit_data_bio(struct inode *inode, struct bio *bio,
0, btrfs_submit_bio_start);
goto out;
} else if (!skip_sum) {
- ret = btrfs_csum_one_bio(BTRFS_I(inode), bio, 0, 0);
+ ret = btrfs_csum_one_bio(BTRFS_I(inode), bio, (u64)-1, false);
if (ret)
goto out;
}
@@ -7845,7 +7845,7 @@ static blk_status_t btrfs_submit_bio_start_direct_io(struct inode *inode,
struct bio *bio,
u64 dio_file_offset)
{
- return btrfs_csum_one_bio(BTRFS_I(inode), bio, dio_file_offset, 1);
+ return btrfs_csum_one_bio(BTRFS_I(inode), bio, dio_file_offset, false);
}
static void btrfs_end_dio_bio(struct bio *bio)
@@ -7902,7 +7902,7 @@ static inline blk_status_t btrfs_submit_dio_bio(struct bio *bio,
* If we aren't doing async submit, calculate the csum of the
* bio now.
*/
- ret = btrfs_csum_one_bio(BTRFS_I(inode), bio, file_offset, 1);
+ ret = btrfs_csum_one_bio(BTRFS_I(inode), bio, file_offset, false);
if (ret)
goto err;
} else {