We check the %csum_type twice. Drop one. Check for the csum_type and
then for the csum. Which also matches with the progs which have better
logic. This is preparatory patch to get proper error code from
btrfs_check_super_csum().
Signed-off-by: Anand Jain <anand.jain@xxxxxxxxxx>
---
fs/btrfs/disk-io.c | 38 +++++++++++++++++---------------------
1 file changed, 17 insertions(+), 21 deletions(-)
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 1657d6aa4fa6..b9b435579527 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -399,32 +399,28 @@ static int btrfs_check_super_csum(struct btrfs_fs_info *fs_info,
struct btrfs_super_block *disk_sb =
(struct btrfs_super_block *)raw_disk_sb;
u16 csum_type = btrfs_super_csum_type(disk_sb);
- int ret = 0;
-
- if (csum_type == BTRFS_CSUM_TYPE_CRC32) {
- u32 crc = ~(u32)0;
- char result[sizeof(crc)];
-
- /*
- * The super_block structure does not span the whole
- * BTRFS_SUPER_INFO_SIZE range, we expect that the unused space
- * is filled with zeros and is included in the checksum.
- */
- crc = btrfs_csum_data(raw_disk_sb + BTRFS_CSUM_SIZE,
- crc, BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE);
- btrfs_csum_final(crc, result);
-
- if (memcmp(raw_disk_sb, result, sizeof(result)))
- ret = 1;
- }
+ u32 crc = ~(u32)0;
+ char result[sizeof(crc)];
if (csum_type >= ARRAY_SIZE(btrfs_csum_sizes)) {
btrfs_err(fs_info, "unsupported checksum algorithm %u",
- csum_type);
- ret = 1;
+ csum_type);
+ return 1;
}
- return ret;
+ /*
+ * The super_block structure does not span the whole
+ * BTRFS_SUPER_INFO_SIZE range, we expect that the unused space
+ * is filled with zeros and is included in the checksum.
+ */
+ crc = btrfs_csum_data(raw_disk_sb + BTRFS_CSUM_SIZE,
+ crc, BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE);
+ btrfs_csum_final(crc, result);
+
+ if (memcmp(raw_disk_sb, result, sizeof(result)))
+ return 1;
+
+ return 0;
}
/*
--
2.7.0
--
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