For code maintainability and scalability,
replace number with a macro of member blocks in btrfs_mkfs_config.
Signed-off-by: Gu Jinxiang <gujx@xxxxxxxxxxxxxx>
---
mkfs/common.c | 2 +-
mkfs/common.h | 5 ++++-
2 files changed, 5 insertions(+), 2 deletions(-)
diff --git a/mkfs/common.c b/mkfs/common.c
index e4785c5..420671b 100644
--- a/mkfs/common.c
+++ b/mkfs/common.c
@@ -94,7 +94,7 @@ int make_btrfs(int fd, struct btrfs_mkfs_config *cfg)
uuid_generate(chunk_tree_uuid);
cfg->blocks[0] = BTRFS_SUPER_INFO_OFFSET;
- for (i = 1; i < 7; i++) {
+ for (i = 1; i <= BTRFS_MKFS_ROOTS_NR; i++) {
cfg->blocks[i] = BTRFS_SUPER_INFO_OFFSET + 1024 * 1024 +
cfg->nodesize * i;
}
diff --git a/mkfs/common.h b/mkfs/common.h
index 666a75b..e23e79b 100644
--- a/mkfs/common.h
+++ b/mkfs/common.h
@@ -28,6 +28,9 @@
#define BTRFS_MKFS_SYSTEM_GROUP_SIZE SZ_4M
#define BTRFS_MKFS_SMALL_VOLUME_SIZE SZ_1G
+/* roots: root tree, extent tree, chunk tree, dev tree, fs tree, csum tree */
+#define BTRFS_MKFS_ROOTS_NR 6
+
struct btrfs_mkfs_config {
/* Label of the new filesystem */
const char *label;
@@ -43,7 +46,7 @@ struct btrfs_mkfs_config {
/* Output fields, set during creation */
/* Logical addresses of superblock [0] and other tree roots */
- u64 blocks[8];
+ u64 blocks[BTRFS_MKFS_ROOTS_NR + 1];
char fs_uuid[BTRFS_UUID_UNPARSED_SIZE];
char chunk_uuid[BTRFS_UUID_UNPARSED_SIZE];
--
2.9.4
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