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>
diff --git a/fs/nilfs2/dat.c b/fs/nilfs2/dat.c
index 1ff8e15..239a422 100644
--- a/fs/nilfs2/dat.c
+++ b/fs/nilfs2/dat.c
@@ -425,3 +425,26 @@
return nvi;
}
+
+/**
+ * nilfs_dat_new - create dat file
+ * @nilfs: nilfs object
+ * @entry_size: size of a dat entry
+ */
+struct inode *nilfs_dat_new(struct the_nilfs *nilfs, size_t entry_size)
+{
+ static struct lock_class_key dat_lock_key;
+ struct inode *dat;
+ int err;
+
+ dat = nilfs_mdt_new(nilfs, NULL, NILFS_DAT_INO, 0);
+ if (dat) {
+ err = nilfs_palloc_init_blockgroup(dat, entry_size);
+ if (unlikely(err)) {
+ nilfs_mdt_destroy(dat);
+ return NULL;
+ }
+ lockdep_set_class(&NILFS_MDT(dat)->mi_sem, &dat_lock_key);
+ }
+ return dat;
+}
