[PATCH v4 06/13] btrfs: format checksums according to type for printing

[Johannes Thumshirn <jthumshirn@suse.de>]

Add a small helper for btrfs_print_data_csum_error() which formats the
checksum according to it's type for pretty printing.

Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>

---
Changes to v3:
- Change the helper function to macros
---
 fs/btrfs/btrfs_inode.h | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/fs/btrfs/btrfs_inode.h b/fs/btrfs/btrfs_inode.h
index d5b438706b77..4543f4864b2d 100644
--- a/fs/btrfs/btrfs_inode.h
+++ b/fs/btrfs/btrfs_inode.h
@@ -337,22 +337,31 @@ static inline void btrfs_inode_resume_unlocked_dio(struct btrfs_inode *inode)
 	clear_bit(BTRFS_INODE_READDIO_NEED_LOCK, &inode->runtime_flags);
 }
 
+#define CSUM_FORMAT "0x%*phN"
+#define CSUM_FORMAT_VALUE(size, bytes)  size, bytes
+
 static inline void btrfs_print_data_csum_error(struct btrfs_inode *inode,
 		u64 logical_start, u32 csum, u32 csum_expected, int mirror_num)
 {
 	struct btrfs_root *root = inode->root;
+	struct btrfs_super_block *sb = root->fs_info->super_copy;
+	u16 csum_size = btrfs_super_csum_size(sb);
 
 	/* Output minus objectid, which is more meaningful */
 	if (root->root_key.objectid >= BTRFS_LAST_FREE_OBJECTID)
 		btrfs_warn_rl(root->fs_info,
-	"csum failed root %lld ino %lld off %llu csum 0x%08x expected csum 0x%08x mirror %d",
+	"csum failed root %lld ino %lld off %llu csum " CSUM_FORMAT " expected csum " CSUM_FORMAT " mirror %d",
 			root->root_key.objectid, btrfs_ino(inode),
-			logical_start, csum, csum_expected, mirror_num);
+			logical_start, CSUM_FORMAT_VALUE(csum_size, &csum),
+			CSUM_FORMAT_VALUE(csum_size, &csum_expected),
+			mirror_num);
 	else
 		btrfs_warn_rl(root->fs_info,
-	"csum failed root %llu ino %llu off %llu csum 0x%08x expected csum 0x%08x mirror %d",
+	"csum failed root %llu ino %llu off %llu csum " CSUM_FORMAT " expected csum " CSUM_FORMAT " mirror %d",
 			root->root_key.objectid, btrfs_ino(inode),
-			logical_start, csum, csum_expected, mirror_num);
+			logical_start, CSUM_FORMAT_VALUE(csum_size, &csum),
+			CSUM_FORMAT_VALUE(csum_size, &csum_expected),
+			mirror_num);
 }
 
 #endif
-- 
2.16.4