path: root/ctree.h
diff options
authorQu Wenruo <>2018-04-30 11:15:44 +0800
committerDavid Sterba <>2018-06-07 16:37:35 +0200
commit8606fe4bcb8ff88a67a939911af9336499486c85 (patch)
treed5af5760632ff52c14d84f29e234ed6408f8f95e /ctree.h
parent41750fe660cd51ca318976761c1938fa70d7ffa2 (diff)
btrfs-progs: Allow tree to be printed without an fs_info
For btrfs_print_tree() and btrfs_print_leaf(), the usage of fs_info is mainly for nodesize and sectorsize. However for nodesize, we can get it from @eb->len without the need for fs_info at all. For nodesize, introduce new helper BTRFS_NODEPTR_PER_EXTENT_BUFFER() to get nodesize from @eb directly. And with the help of previous modified btrfs_leaf_free_space(), btrfs_print_tree() can live without fs_info at all. For btrfs_print_leaf(), we modify print_extent_csum() to accept NULL fs_info by skipping csum length calculation. With all these modification, btrfs_print_tree/leaf() can be called without accessing @fs_info at all, and make it more flexible to handle binary tree block dump, or inside gdb. Signed-off-by: Qu Wenruo <> Reviewed-by: Su Yue <> Signed-off-by: David Sterba <>
Diffstat (limited to 'ctree.h')
1 files changed, 6 insertions, 0 deletions
diff --git a/ctree.h b/ctree.h
index 7e67d1fc..697895a9 100644
--- a/ctree.h
+++ b/ctree.h
@@ -1202,6 +1202,12 @@ static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info)
return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr);
+static inline u32 BTRFS_NODEPTRS_PER_EXTENT_BUFFER(const struct extent_buffer *eb)
+ BUG_ON(eb->fs_info && eb->fs_info->nodesize != eb->len);
+ return __BTRFS_LEAF_DATA_SIZE(eb->len) / sizeof(struct btrfs_key_ptr);
(offsetof(struct btrfs_file_extent_item, disk_bytenr))
static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info)