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| author | Jiro SEKIBA <jir@unicus.jp> | 2009-11-09 13:10:11 +0300 |
|---|---|---|
| committer | Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> | 2009-11-20 04:05:46 +0300 |
| commit | 6600b9dd8e0d4a60c610f216b78d992a598bc52a (patch) | |
| tree | 9c1b718ab0c5d8dea2f200eaa1b8296e655e4657 /include/linux/nilfs2_fs.h | |
| parent | 9b945d537db86557e5b5820b4b52df94c35b3829 (diff) | |
| download | linux-6600b9dd8e0d4a60c610f216b78d992a598bc52a.tar.xz | |
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 <jir@unicus.jp>
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Diffstat (limited to 'include/linux/nilfs2_fs.h')
| -rw-r--r-- | include/linux/nilfs2_fs.h | 22 |
1 files changed, 22 insertions, 0 deletions
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 @@ -403,6 +403,28 @@ struct nilfs_segment_summary { #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 */ |