nilfs2: separate constructor of metadata files

This will displace nilfs_mdt_new() constructor with individual
metadata file constructors like nilfs_dat_new(), new_sufile_new(),
nilfs_cpfile_new(), and nilfs_ifile_new().

This makes it possible for each metadata file to have own
intialization code.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>

1 files changed, 16 insertions, 0 deletions

diff --git a/fs/nilfs2/sufile.c b/fs/nilfs2/sufile.c
index 37994d4a59cc..6fb707ab7e2c 100644
--- a/fs/nilfs2/sufile.c
+++ b/fs/nilfs2/sufile.c
@@ -657,3 +657,19 @@ ssize_t nilfs_sufile_get_suinfo(struct inode *sufile, __u64 segnum, void *buf,
         up_read(&NILFS_MDT(sufile)->mi_sem);
         return ret;
 }
+
+/**
+ * nilfs_sufile_new - create sufile
+ * @nilfs: nilfs object
+ * @susize: size of a segment usage entry
+ */
+struct inode *nilfs_sufile_new(struct the_nilfs *nilfs, size_t susize)
+{
+        struct inode *sufile;
+
+        sufile = nilfs_mdt_new(nilfs, NULL, NILFS_SUFILE_INO, 0);
+        if (sufile)
+                nilfs_mdt_set_entry_size(sufile, susize,
+                                         sizeof(struct nilfs_sufile_header));
+        return sufile;
+}