1 files changed, 47 insertions, 0 deletions
diff --git a/fs/nilfs2/dat.c b/fs/nilfs2/dat.c
index 1ff8e15bd36b..187dd07ba86c 100644
--- a/fs/nilfs2/dat.c
+++ b/fs/nilfs2/dat.c
@@ -33,6 +33,16 @@
 #define NILFS_CNO_MIN   ((__u64)1)
 #define NILFS_CNO_MAX   (~(__u64)0)
+struct nilfs_dat_info {
+        struct nilfs_mdt_info mi;
+        struct nilfs_palloc_cache palloc_cache;
+};
+static inline struct nilfs_dat_info *NILFS_DAT_I(struct inode *dat)
+{
+        return (struct nilfs_dat_info *)NILFS_MDT(dat);
+}
 static int nilfs_dat_prepare_entry(struct inode *dat,
                                   struct nilfs_palloc_req *req, int create)
 {
@@ -425,3 +435,40 @@ ssize_t nilfs_dat_get_vinfo(struct inode *dat, void *buf, unsigned visz,
        return nvi;
 }
+/**
+ * nilfs_dat_read - read dat inode
+ * @dat: dat inode
+ * @raw_inode: on-disk dat inode
+ */
+int nilfs_dat_read(struct inode *dat, struct nilfs_inode *raw_inode)
+{
+        return nilfs_read_inode_common(dat, raw_inode);
+}
+/**
+ * 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;
+        struct nilfs_dat_info *di;
+        int err;
+        dat = nilfs_mdt_new(nilfs, NULL, NILFS_DAT_INO, sizeof(*di));
+        if (dat) {
+                err = nilfs_palloc_init_blockgroup(dat, entry_size);
+                if (unlikely(err)) {
+                        nilfs_mdt_destroy(dat);
+                        return NULL;
+                }
+                di = NILFS_DAT_I(dat);
+                lockdep_set_class(&di->mi.mi_sem, &dat_lock_key);
+                nilfs_palloc_setup_cache(dat, &di->palloc_cache);
+        }
+        return dat;
+}

diff --git a/fs/nilfs2/dat.c b/fs/nilfs2/dat.c index 1ff8e15bd36b..187dd07ba86c 100644 --- a/fs/nilfs2/dat.c +++ b/fs/nilfs2/dat.c
@@ -33,6 +33,16 @@
33	#define NILFS_CNO_MIN ((__u64)1)	33	#define NILFS_CNO_MIN ((__u64)1)
34	#define NILFS_CNO_MAX (~(__u64)0)	34	#define NILFS_CNO_MAX (~(__u64)0)
35		35
		36	struct nilfs_dat_info {
		37	struct nilfs_mdt_info mi;
		38	struct nilfs_palloc_cache palloc_cache;
		39	};
		40
		41	static inline struct nilfs_dat_info NILFS_DAT_I(struct inode dat)
		42	{
		43	return (struct nilfs_dat_info *)NILFS_MDT(dat);
		44	}
		45
36	static int nilfs_dat_prepare_entry(struct inode *dat,	46	static int nilfs_dat_prepare_entry(struct inode *dat,
37	struct nilfs_palloc_req *req, int create)	47	struct nilfs_palloc_req *req, int create)
38	{	48	{
@@ -425,3 +435,40 @@ ssize_t nilfs_dat_get_vinfo(struct inode dat, void buf, unsigned visz,
425		435
426	return nvi;	436	return nvi;
427	}	437	}
		438
		439	/**
		440	* nilfs_dat_read - read dat inode
		441	* @dat: dat inode
		442	* @raw_inode: on-disk dat inode
		443	*/
		444	int nilfs_dat_read(struct inode dat, struct nilfs_inode raw_inode)
		445	{
		446	return nilfs_read_inode_common(dat, raw_inode);
		447	}
		448
		449	/**
		450	* nilfs_dat_new - create dat file
		451	* @nilfs: nilfs object
		452	* @entry_size: size of a dat entry
		453	*/
		454	struct inode nilfs_dat_new(struct the_nilfs nilfs, size_t entry_size)
		455	{
		456	static struct lock_class_key dat_lock_key;
		457	struct inode *dat;
		458	struct nilfs_dat_info *di;
		459	int err;
		460
		461	dat = nilfs_mdt_new(nilfs, NULL, NILFS_DAT_INO, sizeof(*di));
		462	if (dat) {
		463	err = nilfs_palloc_init_blockgroup(dat, entry_size);
		464	if (unlikely(err)) {
		465	nilfs_mdt_destroy(dat);
		466	return NULL;
		467	}
		468
		469	di = NILFS_DAT_I(dat);
		470	lockdep_set_class(&di->mi.mi_sem, &dat_lock_key);
		471	nilfs_palloc_setup_cache(dat, &di->palloc_cache);
		472	}
		473	return dat;
		474	}