#include <linux/buffer_head.h>
#include <linux/nilfs2_fs.h>
#include "alloc.h"
+#include "dat.h"
#define NILFS_BMAP_INVALID_PTR 0
*/
struct nilfs_bmap_operations {
int (*bop_lookup)(const struct nilfs_bmap *, __u64, int, __u64 *);
+ int (*bop_lookup_contig)(const struct nilfs_bmap *, __u64, __u64 *,
+ unsigned);
int (*bop_insert)(struct nilfs_bmap *, __u64, __u64);
int (*bop_delete)(struct nilfs_bmap *, __u64);
void (*bop_clear)(struct nilfs_bmap *);
};
-/**
- * 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 \
* @b_sem: semaphore
* @b_inode: owner of bmap
* @b_ops: bmap operation table
- * @b_pops: bmap ptr operation table
- * @b_low: low watermark of conversion
- * @b_high: high watermark of conversion
* @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 {
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_low;
- __u64 b_high;
__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
int nilfs_bmap_test_and_clear_dirty(struct nilfs_bmap *);
int nilfs_bmap_read(struct nilfs_bmap *, struct nilfs_inode *);
void nilfs_bmap_write(struct nilfs_bmap *, struct nilfs_inode *);
-int nilfs_bmap_lookup(struct nilfs_bmap *, unsigned long, unsigned long *);
+int nilfs_bmap_lookup_contig(struct nilfs_bmap *, __u64, __u64 *, unsigned);
int nilfs_bmap_insert(struct nilfs_bmap *, unsigned long, unsigned long);
int nilfs_bmap_delete(struct nilfs_bmap *, unsigned long);
int nilfs_bmap_last_key(struct nilfs_bmap *, unsigned long *);
void nilfs_bmap_commit_gcdat(struct nilfs_bmap *, struct nilfs_bmap *);
+static inline int nilfs_bmap_lookup(struct nilfs_bmap *bmap, __u64 key,
+ __u64 *ptr)
+{
+ return nilfs_bmap_lookup_at_level(bmap, key, 1, ptr);
+}
+
/*
* Internal use only
*/
+struct inode *nilfs_bmap_get_dat(const struct nilfs_bmap *);
-int nilfs_bmap_start_v(struct nilfs_bmap *, union nilfs_bmap_ptr_req *,
- sector_t);
-int nilfs_bmap_move_v(const struct nilfs_bmap *, __u64, sector_t);
-int nilfs_bmap_mark_dirty(const struct nilfs_bmap *, __u64);
+static inline int nilfs_bmap_prepare_alloc_ptr(struct nilfs_bmap *bmap,
+ union nilfs_bmap_ptr_req *req,
+ struct inode *dat)
+{
+ if (dat)
+ return nilfs_dat_prepare_alloc(dat, &req->bpr_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,
+ struct inode *dat)
+{
+ if (dat)
+ nilfs_dat_commit_alloc(dat, &req->bpr_req);
+}
+
+static inline void nilfs_bmap_abort_alloc_ptr(struct nilfs_bmap *bmap,
+ union nilfs_bmap_ptr_req *req,
+ struct inode *dat)
+{
+ if (dat)
+ nilfs_dat_abort_alloc(dat, &req->bpr_req);
+ else
+ bmap->b_last_allocated_ptr--;
+}
+
+static inline int nilfs_bmap_prepare_end_ptr(struct nilfs_bmap *bmap,
+ union nilfs_bmap_ptr_req *req,
+ struct inode *dat)
+{
+ return dat ? nilfs_dat_prepare_end(dat, &req->bpr_req) : 0;
+}
+
+static inline void nilfs_bmap_commit_end_ptr(struct nilfs_bmap *bmap,
+ union nilfs_bmap_ptr_req *req,
+ struct inode *dat)
+{
+ if (dat)
+ nilfs_dat_commit_end(dat, &req->bpr_req,
+ bmap->b_ptr_type == NILFS_BMAP_PTR_VS);
+}
+
+static inline void nilfs_bmap_abort_end_ptr(struct nilfs_bmap *bmap,
+ union nilfs_bmap_ptr_req *req,
+ struct inode *dat)
+{
+ if (dat)
+ nilfs_dat_abort_end(dat, &req->bpr_req);
+}
__u64 nilfs_bmap_data_get_key(const struct nilfs_bmap *,
const struct buffer_head *);
__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 *);
-
void nilfs_bmap_add_blocks(const struct nilfs_bmap *, int);
void nilfs_bmap_sub_blocks(const struct nilfs_bmap *, int);
-int nilfs_bmap_get_block(const struct nilfs_bmap *, __u64,
- struct buffer_head **);
-void nilfs_bmap_put_block(const struct nilfs_bmap *, struct buffer_head *);
-int nilfs_bmap_get_new_block(const struct nilfs_bmap *, __u64,
- struct buffer_head **);
-void nilfs_bmap_delete_block(const struct nilfs_bmap *, struct buffer_head *);
-
-
/* Assume that bmap semaphore is locked. */
static inline int nilfs_bmap_dirty(const struct nilfs_bmap *bmap)
{
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