btrfs-progs: Use fs_info instead of root for BTRFS_NODEPTRS_PER_BLOCK

Do a cleanup. Also make it consistent with kernel.  Use fs_info instead
of root for BTRFS_NODEPTRS_PER_BLOCK, since maybe in some situation we
do not know root, but just know fs_info.

To be consistent with kernel, change macro to inline function.

Signed-off-by: Gu Jinxiang <gujx@cn.fujitsu.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

1 files changed, 5 insertions, 3 deletions

diff --git a/ctree.h b/ctree.h
index d50866b1..0e5c774c 100644
--- a/ctree.h
+++ b/ctree.h
@@ -356,9 +356,6 @@ struct btrfs_header {
 	u8 level;
 } __attribute__ ((__packed__));
 
-#define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->fs_info->nodesize - \
-			        sizeof(struct btrfs_header)) / \
-			        sizeof(struct btrfs_key_ptr))
 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
 #define BTRFS_LEAF_DATA_SIZE(fs_info) \
 				(__BTRFS_LEAF_DATA_SIZE(fs_info->nodesize))
@@ -1191,6 +1188,11 @@ struct btrfs_root {
 	struct rb_node rb_node;
 };
 
+static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info)
+{
+	return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr);
+}
+
 /*
  * inode items have the data typically returned from stat and store other
  * info about object characteristics.  There is one for every file and dir in