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Diffstat (limited to 'fs/nilfs2/bmap.h')
-rw-r--r--fs/nilfs2/bmap.h110
1 files changed, 78 insertions, 32 deletions
diff --git a/fs/nilfs2/bmap.h b/fs/nilfs2/bmap.h
index 28c77bb71bb7..47f5b74713c0 100644
--- a/fs/nilfs2/bmap.h
+++ b/fs/nilfs2/bmap.h
@@ -86,27 +86,6 @@ struct nilfs_bmap_operations {
};
-/**
- * struct nilfs_bmap_ptr_operations - bmap ptr operation table
- */
-struct nilfs_bmap_ptr_operations {
- int (*bpop_prepare_alloc_ptr)(struct nilfs_bmap *,
- union nilfs_bmap_ptr_req *);
- void (*bpop_commit_alloc_ptr)(struct nilfs_bmap *,
- union nilfs_bmap_ptr_req *);
- void (*bpop_abort_alloc_ptr)(struct nilfs_bmap *,
- union nilfs_bmap_ptr_req *);
- int (*bpop_prepare_end_ptr)(struct nilfs_bmap *,
- union nilfs_bmap_ptr_req *);
- void (*bpop_commit_end_ptr)(struct nilfs_bmap *,
- union nilfs_bmap_ptr_req *);
- void (*bpop_abort_end_ptr)(struct nilfs_bmap *,
- union nilfs_bmap_ptr_req *);
-
- int (*bpop_translate)(const struct nilfs_bmap *, __u64, __u64 *);
-};
-
-
#define NILFS_BMAP_SIZE (NILFS_INODE_BMAP_SIZE * sizeof(__le64))
#define NILFS_BMAP_KEY_BIT (sizeof(unsigned long) * 8 /* CHAR_BIT */)
#define NILFS_BMAP_NEW_PTR_INIT \
@@ -124,9 +103,9 @@ static inline int nilfs_bmap_is_new_ptr(unsigned long ptr)
* @b_sem: semaphore
* @b_inode: owner of bmap
* @b_ops: bmap operation table
- * @b_pops: bmap ptr operation table
* @b_last_allocated_key: last allocated key for data block
* @b_last_allocated_ptr: last allocated ptr for data block
+ * @b_ptr_type: pointer type
* @b_state: state
*/
struct nilfs_bmap {
@@ -137,12 +116,22 @@ struct nilfs_bmap {
struct rw_semaphore b_sem;
struct inode *b_inode;
const struct nilfs_bmap_operations *b_ops;
- const struct nilfs_bmap_ptr_operations *b_pops;
__u64 b_last_allocated_key;
__u64 b_last_allocated_ptr;
+ int b_ptr_type;
int b_state;
};
+/* pointer type */
+#define NILFS_BMAP_PTR_P 0 /* physical block number (i.e. LBN) */
+#define NILFS_BMAP_PTR_VS 1 /* virtual block number (single
+ version) */
+#define NILFS_BMAP_PTR_VM 2 /* virtual block number (has multiple
+ versions) */
+#define NILFS_BMAP_PTR_U (-1) /* never perform pointer operations */
+
+#define NILFS_BMAP_USE_VBN(bmap) ((bmap)->b_ptr_type > 0)
+
/* state */
#define NILFS_BMAP_DIRTY 0x00000001
@@ -171,6 +160,63 @@ void nilfs_bmap_commit_gcdat(struct nilfs_bmap *, struct nilfs_bmap *);
/*
* Internal use only
*/
+int nilfs_bmap_prepare_alloc_v(struct nilfs_bmap *,
+ union nilfs_bmap_ptr_req *);
+void nilfs_bmap_commit_alloc_v(struct nilfs_bmap *,
+ union nilfs_bmap_ptr_req *);
+void nilfs_bmap_abort_alloc_v(struct nilfs_bmap *,
+ union nilfs_bmap_ptr_req *);
+
+static inline int nilfs_bmap_prepare_alloc_ptr(struct nilfs_bmap *bmap,
+ union nilfs_bmap_ptr_req *req)
+{
+ if (NILFS_BMAP_USE_VBN(bmap))
+ return nilfs_bmap_prepare_alloc_v(bmap, req);
+ /* ignore target ptr */
+ req->bpr_ptr = bmap->b_last_allocated_ptr++;
+ return 0;
+}
+
+static inline void nilfs_bmap_commit_alloc_ptr(struct nilfs_bmap *bmap,
+ union nilfs_bmap_ptr_req *req)
+{
+ if (NILFS_BMAP_USE_VBN(bmap))
+ nilfs_bmap_commit_alloc_v(bmap, req);
+}
+
+static inline void nilfs_bmap_abort_alloc_ptr(struct nilfs_bmap *bmap,
+ union nilfs_bmap_ptr_req *req)
+{
+ if (NILFS_BMAP_USE_VBN(bmap))
+ nilfs_bmap_abort_alloc_v(bmap, req);
+ else
+ bmap->b_last_allocated_ptr--;
+}
+
+int nilfs_bmap_prepare_end_v(struct nilfs_bmap *, union nilfs_bmap_ptr_req *);
+void nilfs_bmap_commit_end_v(struct nilfs_bmap *, union nilfs_bmap_ptr_req *);
+void nilfs_bmap_abort_end_v(struct nilfs_bmap *, union nilfs_bmap_ptr_req *);
+
+static inline int nilfs_bmap_prepare_end_ptr(struct nilfs_bmap *bmap,
+ union nilfs_bmap_ptr_req *req)
+{
+ return NILFS_BMAP_USE_VBN(bmap) ?
+ nilfs_bmap_prepare_end_v(bmap, req) : 0;
+}
+
+static inline void nilfs_bmap_commit_end_ptr(struct nilfs_bmap *bmap,
+ union nilfs_bmap_ptr_req *req)
+{
+ if (NILFS_BMAP_USE_VBN(bmap))
+ nilfs_bmap_commit_end_v(bmap, req);
+}
+
+static inline void nilfs_bmap_abort_end_ptr(struct nilfs_bmap *bmap,
+ union nilfs_bmap_ptr_req *req)
+{
+ if (NILFS_BMAP_USE_VBN(bmap))
+ nilfs_bmap_abort_end_v(bmap, req);
+}
int nilfs_bmap_start_v(struct nilfs_bmap *, union nilfs_bmap_ptr_req *,
sector_t);
@@ -184,15 +230,15 @@ __u64 nilfs_bmap_data_get_key(const struct nilfs_bmap *,
__u64 nilfs_bmap_find_target_seq(const struct nilfs_bmap *, __u64);
__u64 nilfs_bmap_find_target_in_group(const struct nilfs_bmap *);
-int nilfs_bmap_prepare_update(struct nilfs_bmap *,
- union nilfs_bmap_ptr_req *,
- union nilfs_bmap_ptr_req *);
-void nilfs_bmap_commit_update(struct nilfs_bmap *,
- union nilfs_bmap_ptr_req *,
- union nilfs_bmap_ptr_req *);
-void nilfs_bmap_abort_update(struct nilfs_bmap *,
- union nilfs_bmap_ptr_req *,
- union nilfs_bmap_ptr_req *);
+int nilfs_bmap_prepare_update_v(struct nilfs_bmap *,
+ union nilfs_bmap_ptr_req *,
+ union nilfs_bmap_ptr_req *);
+void nilfs_bmap_commit_update_v(struct nilfs_bmap *,
+ union nilfs_bmap_ptr_req *,
+ union nilfs_bmap_ptr_req *);
+void nilfs_bmap_abort_update_v(struct nilfs_bmap *,
+ union nilfs_bmap_ptr_req *,
+ union nilfs_bmap_ptr_req *);
void nilfs_bmap_add_blocks(const struct nilfs_bmap *, int);
void nilfs_bmap_sub_blocks(const struct nilfs_bmap *, int);