From 6600b9dd8e0d4a60c610f216b78d992a598bc52a Mon Sep 17 00:00:00 2001 From: Jiro SEKIBA Date: Mon, 9 Nov 2009 19:10:11 +0900 Subject: nilfs2: move definition of struct nilfs_btree_node This is a trivial patch to expose struct nilfs_fs_btree_node. The struct should be exposed outside of kernel, for it is disk format. Signed-off-by: Jiro SEKIBA Signed-off-by: Ryusuke Konishi --- include/linux/nilfs2_fs.h | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) (limited to 'include') diff --git a/include/linux/nilfs2_fs.h b/include/linux/nilfs2_fs.h index ce520402e840..72289d2bb341 100644 --- a/include/linux/nilfs2_fs.h +++ b/include/linux/nilfs2_fs.h @@ -402,6 +402,28 @@ struct nilfs_segment_summary { #define NILFS_SS_SYNDT 0x0008 /* includes data only updates */ #define NILFS_SS_GC 0x0010 /* segment written for cleaner operation */ +/** + * struct nilfs_btree_node - B-tree node + * @bn_flags: flags + * @bn_level: level + * @bn_nchildren: number of children + * @bn_pad: padding + */ +struct nilfs_btree_node { + __u8 bn_flags; + __u8 bn_level; + __le16 bn_nchildren; + __le32 bn_pad; +}; + +/* flags */ +#define NILFS_BTREE_NODE_ROOT 0x01 + +/* level */ +#define NILFS_BTREE_LEVEL_DATA 0 +#define NILFS_BTREE_LEVEL_NODE_MIN (NILFS_BTREE_LEVEL_DATA + 1) +#define NILFS_BTREE_LEVEL_MAX 14 + /** * struct nilfs_palloc_group_desc - block group descriptor * @pg_nfrees: number of free entries in block group -- cgit v1.2.3