Return the required -EINVAL and -EUCLEAN from the function
btrfs_check_super_csum(). And more the error log into the
parent function.
Signed-off-by: Anand Jain <anand.jain@xxxxxxxxxx>
v1->v2:
Fix commit indent reported by checkpatch.pl
Fix pr_err split string
---
fs/btrfs/disk-io.c | 25 ++++++++++++++-----------
1 file changed, 14 insertions(+), 11 deletions(-)
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index b9b435579527..4c573602480c 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -392,9 +392,10 @@ static int verify_parent_transid(struct extent_io_tree *io_tree,
/*
* Return 0 if the superblock checksum type matches the checksum value of that
* algorithm. Pass the raw disk superblock data.
+ * Otherwise: -EINVAL if csum type is not found
+ * -EUCLEAN if csum does not match
*/
-static int btrfs_check_super_csum(struct btrfs_fs_info *fs_info,
- char *raw_disk_sb)
+static int btrfs_check_super_csum(char *raw_disk_sb)
{
struct btrfs_super_block *disk_sb =
(struct btrfs_super_block *)raw_disk_sb;
@@ -402,11 +403,8 @@ static int btrfs_check_super_csum(struct btrfs_fs_info *fs_info,
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);
- return 1;
- }
+ if (csum_type >= ARRAY_SIZE(btrfs_csum_sizes))
+ return -EINVAL;
/*
* The super_block structure does not span the whole
@@ -418,7 +416,7 @@ static int btrfs_check_super_csum(struct btrfs_fs_info *fs_info,
btrfs_csum_final(crc, result);
if (memcmp(raw_disk_sb, result, sizeof(result)))
- return 1;
+ return -EUCLEAN;
return 0;
}
@@ -2570,9 +2568,14 @@ int open_ctree(struct super_block *sb,
* We want to check superblock checksum, the type is stored inside.
* Pass the whole disk block of size BTRFS_SUPER_INFO_SIZE (4k).
*/
- if (btrfs_check_super_csum(fs_info, bh->b_data)) {
- btrfs_err(fs_info, "superblock checksum mismatch");
- err = -EINVAL;
+ err = btrfs_check_super_csum(bh->b_data);
+ if (err) {
+ if (err == -EINVAL)
+ pr_err("BTRFS error (device %pg): unsupported checksum algorithm",
+ fs_devices->latest_bdev);
+ else
+ pr_err("BTRFS error (device %pg): superblock checksum mismatch",
+ fs_devices->latest_bdev);
brelse(bh);
goto fail_alloc;
}
--
2.7.0
--
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