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-rw-r--r--fs/nilfs2/dat.c23
1 files changed, 23 insertions, 0 deletions
diff --git a/fs/nilfs2/dat.c b/fs/nilfs2/dat.c
index 1ff8e15bd36b..239a42234999 100644
--- a/fs/nilfs2/dat.c
+++ b/fs/nilfs2/dat.c
@@ -425,3 +425,26 @@ ssize_t nilfs_dat_get_vinfo(struct inode *dat, void *buf, unsigned visz,
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;
+}