We have sectorsize same as PAGE_SIZE, the checksum can be calculated in
one go.
Signed-off-by: David Sterba <dsterba@xxxxxxxx>
---
fs/btrfs/scrub.c | 24 +++---------------------
1 file changed, 3 insertions(+), 21 deletions(-)
diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c
index aecaf5c7f655..16c83130d884 100644
--- a/fs/btrfs/scrub.c
+++ b/fs/btrfs/scrub.c
@@ -1789,37 +1789,19 @@ static int scrub_checksum_data(struct scrub_block *sblock)
u8 *on_disk_csum;
struct page *page;
char *kaddr;
- u64 len;
- int index;
BUG_ON(sblock->page_count < 1);
if (!sblock->pagev[0]->have_csum)
return 0;
- shash->tfm = fs_info->csum_shash;
- crypto_shash_init(shash);
-
on_disk_csum = sblock->pagev[0]->csum;
page = sblock->pagev[0]->page;
kaddr = page_address(page);
- len = sctx->fs_info->sectorsize;
- index = 0;
- for (;;) {
- u64 l = min_t(u64, len, PAGE_SIZE);
-
- crypto_shash_update(shash, kaddr, l);
- len -= l;
- if (len == 0)
- break;
- index++;
- BUG_ON(index >= sblock->page_count);
- BUG_ON(!sblock->pagev[index]->page);
- page = sblock->pagev[index]->page;
- kaddr = page_address(page);
- }
+ shash->tfm = fs_info->csum_shash;
+ crypto_shash_init(shash);
+ crypto_shash_digest(shash, kaddr, PAGE_SIZE, csum);
- crypto_shash_final(shash, csum);
if (memcmp(csum, on_disk_csum, sctx->csum_size))
sblock->checksum_error = 1;
--
2.25.0
