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authorRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2011-03-09 11:05:08 +0900
committerRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2011-03-09 11:54:26 +0900
commite3154e9748f0f337e9f6ff9dc7d7bf24d426bd1a (patch)
treeac2a3f3dca6189b8a608571c49da66386fd1bdec /fs/nilfs2/mdt.h
parentf7545144c2e3d280139260df934043e0a6ccce6f (diff)
downloadop-kernel-dev-e3154e9748f0f337e9f6ff9dc7d7bf24d426bd1a.zip
op-kernel-dev-e3154e9748f0f337e9f6ff9dc7d7bf24d426bd1a.tar.gz
nilfs2: get rid of nilfs_sb_info structure
This directly uses sb->s_fs_info to keep a nilfs filesystem object and fully removes the intermediate nilfs_sb_info structure. With this change, the hierarchy of on-memory structures of nilfs will be simplified as follows: Before: super_block -> nilfs_sb_info -> the_nilfs -> cptree --+-> nilfs_root (current file system) +-> nilfs_root (snapshot A) +-> nilfs_root (snapshot B) : -> nilfs_sc_info (log writer structure) After: super_block -> the_nilfs -> cptree --+-> nilfs_root (current file system) +-> nilfs_root (snapshot A) +-> nilfs_root (snapshot B) : -> nilfs_sc_info (log writer structure) The reason why we didn't design so from the beginning is because the initial shape also differed from the above. The early hierachy was composed of "per-mount-point" super_block -> nilfs_sb_info pairs and a shared nilfs object. On the kernel 2.6.37, it was changed to the current shape in order to unify super block instances into one per device, and this cleanup became applicable as the result. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Diffstat (limited to 'fs/nilfs2/mdt.h')
-rw-r--r--fs/nilfs2/mdt.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/nilfs2/mdt.h b/fs/nilfs2/mdt.h
index b13734b..ed68563 100644
--- a/fs/nilfs2/mdt.h
+++ b/fs/nilfs2/mdt.h
@@ -66,7 +66,7 @@ static inline struct nilfs_mdt_info *NILFS_MDT(const struct inode *inode)
static inline struct the_nilfs *NILFS_I_NILFS(struct inode *inode)
{
- return NILFS_SB(inode->i_sb)->s_nilfs;
+ return inode->i_sb->s_fs_info;
}
/* Default GFP flags using highmem */
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