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Diffstat (limited to 'fs/nilfs2/bmap.h')
-rw-r--r--fs/nilfs2/bmap.h135
1 files changed, 84 insertions, 51 deletions
diff --git a/fs/nilfs2/bmap.h b/fs/nilfs2/bmap.h
index 4f2708abb1ba..b2890cdcef12 100644
--- a/fs/nilfs2/bmap.h
+++ b/fs/nilfs2/bmap.h
@@ -64,6 +64,8 @@ struct nilfs_bmap_stats {
64 */ 64 */
65struct nilfs_bmap_operations { 65struct nilfs_bmap_operations {
66 int (*bop_lookup)(const struct nilfs_bmap *, __u64, int, __u64 *); 66 int (*bop_lookup)(const struct nilfs_bmap *, __u64, int, __u64 *);
67 int (*bop_lookup_contig)(const struct nilfs_bmap *, __u64, __u64 *,
68 unsigned);
67 int (*bop_insert)(struct nilfs_bmap *, __u64, __u64); 69 int (*bop_insert)(struct nilfs_bmap *, __u64, __u64);
68 int (*bop_delete)(struct nilfs_bmap *, __u64); 70 int (*bop_delete)(struct nilfs_bmap *, __u64);
69 void (*bop_clear)(struct nilfs_bmap *); 71 void (*bop_clear)(struct nilfs_bmap *);
@@ -86,34 +88,6 @@ struct nilfs_bmap_operations {
86}; 88};
87 89
88 90
89/**
90 * struct nilfs_bmap_ptr_operations - bmap ptr operation table
91 */
92struct nilfs_bmap_ptr_operations {
93 int (*bpop_prepare_alloc_ptr)(struct nilfs_bmap *,
94 union nilfs_bmap_ptr_req *);
95 void (*bpop_commit_alloc_ptr)(struct nilfs_bmap *,
96 union nilfs_bmap_ptr_req *);
97 void (*bpop_abort_alloc_ptr)(struct nilfs_bmap *,
98 union nilfs_bmap_ptr_req *);
99 int (*bpop_prepare_start_ptr)(struct nilfs_bmap *,
100 union nilfs_bmap_ptr_req *);
101 void (*bpop_commit_start_ptr)(struct nilfs_bmap *,
102 union nilfs_bmap_ptr_req *,
103 sector_t);
104 void (*bpop_abort_start_ptr)(struct nilfs_bmap *,
105 union nilfs_bmap_ptr_req *);
106 int (*bpop_prepare_end_ptr)(struct nilfs_bmap *,
107 union nilfs_bmap_ptr_req *);
108 void (*bpop_commit_end_ptr)(struct nilfs_bmap *,
109 union nilfs_bmap_ptr_req *);
110 void (*bpop_abort_end_ptr)(struct nilfs_bmap *,
111 union nilfs_bmap_ptr_req *);
112
113 int (*bpop_translate)(const struct nilfs_bmap *, __u64, __u64 *);
114};
115
116
117#define NILFS_BMAP_SIZE (NILFS_INODE_BMAP_SIZE * sizeof(__le64)) 91#define NILFS_BMAP_SIZE (NILFS_INODE_BMAP_SIZE * sizeof(__le64))
118#define NILFS_BMAP_KEY_BIT (sizeof(unsigned long) * 8 /* CHAR_BIT */) 92#define NILFS_BMAP_KEY_BIT (sizeof(unsigned long) * 8 /* CHAR_BIT */)
119#define NILFS_BMAP_NEW_PTR_INIT \ 93#define NILFS_BMAP_NEW_PTR_INIT \
@@ -131,11 +105,9 @@ static inline int nilfs_bmap_is_new_ptr(unsigned long ptr)
131 * @b_sem: semaphore 105 * @b_sem: semaphore
132 * @b_inode: owner of bmap 106 * @b_inode: owner of bmap
133 * @b_ops: bmap operation table 107 * @b_ops: bmap operation table
134 * @b_pops: bmap ptr operation table
135 * @b_low: low watermark of conversion
136 * @b_high: high watermark of conversion
137 * @b_last_allocated_key: last allocated key for data block 108 * @b_last_allocated_key: last allocated key for data block
138 * @b_last_allocated_ptr: last allocated ptr for data block 109 * @b_last_allocated_ptr: last allocated ptr for data block
110 * @b_ptr_type: pointer type
139 * @b_state: state 111 * @b_state: state
140 */ 112 */
141struct nilfs_bmap { 113struct nilfs_bmap {
@@ -146,14 +118,22 @@ struct nilfs_bmap {
146 struct rw_semaphore b_sem; 118 struct rw_semaphore b_sem;
147 struct inode *b_inode; 119 struct inode *b_inode;
148 const struct nilfs_bmap_operations *b_ops; 120 const struct nilfs_bmap_operations *b_ops;
149 const struct nilfs_bmap_ptr_operations *b_pops;
150 __u64 b_low;
151 __u64 b_high;
152 __u64 b_last_allocated_key; 121 __u64 b_last_allocated_key;
153 __u64 b_last_allocated_ptr; 122 __u64 b_last_allocated_ptr;
123 int b_ptr_type;
154 int b_state; 124 int b_state;
155}; 125};
156 126
127/* pointer type */
128#define NILFS_BMAP_PTR_P 0 /* physical block number (i.e. LBN) */
129#define NILFS_BMAP_PTR_VS 1 /* virtual block number (single
130 version) */
131#define NILFS_BMAP_PTR_VM 2 /* virtual block number (has multiple
132 versions) */
133#define NILFS_BMAP_PTR_U (-1) /* never perform pointer operations */
134
135#define NILFS_BMAP_USE_VBN(bmap) ((bmap)->b_ptr_type > 0)
136
157/* state */ 137/* state */
158#define NILFS_BMAP_DIRTY 0x00000001 138#define NILFS_BMAP_DIRTY 0x00000001
159 139
@@ -162,6 +142,7 @@ int nilfs_bmap_test_and_clear_dirty(struct nilfs_bmap *);
162int nilfs_bmap_read(struct nilfs_bmap *, struct nilfs_inode *); 142int nilfs_bmap_read(struct nilfs_bmap *, struct nilfs_inode *);
163void nilfs_bmap_write(struct nilfs_bmap *, struct nilfs_inode *); 143void nilfs_bmap_write(struct nilfs_bmap *, struct nilfs_inode *);
164int nilfs_bmap_lookup(struct nilfs_bmap *, unsigned long, unsigned long *); 144int nilfs_bmap_lookup(struct nilfs_bmap *, unsigned long, unsigned long *);
145int nilfs_bmap_lookup_contig(struct nilfs_bmap *, __u64, __u64 *, unsigned);
165int nilfs_bmap_insert(struct nilfs_bmap *, unsigned long, unsigned long); 146int nilfs_bmap_insert(struct nilfs_bmap *, unsigned long, unsigned long);
166int nilfs_bmap_delete(struct nilfs_bmap *, unsigned long); 147int nilfs_bmap_delete(struct nilfs_bmap *, unsigned long);
167int nilfs_bmap_last_key(struct nilfs_bmap *, unsigned long *); 148int nilfs_bmap_last_key(struct nilfs_bmap *, unsigned long *);
@@ -182,7 +163,67 @@ void nilfs_bmap_commit_gcdat(struct nilfs_bmap *, struct nilfs_bmap *);
182/* 163/*
183 * Internal use only 164 * Internal use only
184 */ 165 */
166struct inode *nilfs_bmap_get_dat(const struct nilfs_bmap *);
167int nilfs_bmap_prepare_alloc_v(struct nilfs_bmap *,
168 union nilfs_bmap_ptr_req *);
169void nilfs_bmap_commit_alloc_v(struct nilfs_bmap *,
170 union nilfs_bmap_ptr_req *);
171void nilfs_bmap_abort_alloc_v(struct nilfs_bmap *,
172 union nilfs_bmap_ptr_req *);
185 173
174static inline int nilfs_bmap_prepare_alloc_ptr(struct nilfs_bmap *bmap,
175 union nilfs_bmap_ptr_req *req)
176{
177 if (NILFS_BMAP_USE_VBN(bmap))
178 return nilfs_bmap_prepare_alloc_v(bmap, req);
179 /* ignore target ptr */
180 req->bpr_ptr = bmap->b_last_allocated_ptr++;
181 return 0;
182}
183
184static inline void nilfs_bmap_commit_alloc_ptr(struct nilfs_bmap *bmap,
185 union nilfs_bmap_ptr_req *req)
186{
187 if (NILFS_BMAP_USE_VBN(bmap))
188 nilfs_bmap_commit_alloc_v(bmap, req);
189}
190
191static inline void nilfs_bmap_abort_alloc_ptr(struct nilfs_bmap *bmap,
192 union nilfs_bmap_ptr_req *req)
193{
194 if (NILFS_BMAP_USE_VBN(bmap))
195 nilfs_bmap_abort_alloc_v(bmap, req);
196 else
197 bmap->b_last_allocated_ptr--;
198}
199
200int nilfs_bmap_prepare_end_v(struct nilfs_bmap *, union nilfs_bmap_ptr_req *);
201void nilfs_bmap_commit_end_v(struct nilfs_bmap *, union nilfs_bmap_ptr_req *);
202void nilfs_bmap_abort_end_v(struct nilfs_bmap *, union nilfs_bmap_ptr_req *);
203
204static inline int nilfs_bmap_prepare_end_ptr(struct nilfs_bmap *bmap,
205 union nilfs_bmap_ptr_req *req)
206{
207 return NILFS_BMAP_USE_VBN(bmap) ?
208 nilfs_bmap_prepare_end_v(bmap, req) : 0;
209}
210
211static inline void nilfs_bmap_commit_end_ptr(struct nilfs_bmap *bmap,
212 union nilfs_bmap_ptr_req *req)
213{
214 if (NILFS_BMAP_USE_VBN(bmap))
215 nilfs_bmap_commit_end_v(bmap, req);
216}
217
218static inline void nilfs_bmap_abort_end_ptr(struct nilfs_bmap *bmap,
219 union nilfs_bmap_ptr_req *req)
220{
221 if (NILFS_BMAP_USE_VBN(bmap))
222 nilfs_bmap_abort_end_v(bmap, req);
223}
224
225int nilfs_bmap_start_v(struct nilfs_bmap *, union nilfs_bmap_ptr_req *,
226 sector_t);
186int nilfs_bmap_move_v(const struct nilfs_bmap *, __u64, sector_t); 227int nilfs_bmap_move_v(const struct nilfs_bmap *, __u64, sector_t);
187int nilfs_bmap_mark_dirty(const struct nilfs_bmap *, __u64); 228int nilfs_bmap_mark_dirty(const struct nilfs_bmap *, __u64);
188 229
@@ -193,28 +234,20 @@ __u64 nilfs_bmap_data_get_key(const struct nilfs_bmap *,
193__u64 nilfs_bmap_find_target_seq(const struct nilfs_bmap *, __u64); 234__u64 nilfs_bmap_find_target_seq(const struct nilfs_bmap *, __u64);
194__u64 nilfs_bmap_find_target_in_group(const struct nilfs_bmap *); 235__u64 nilfs_bmap_find_target_in_group(const struct nilfs_bmap *);
195 236
196int nilfs_bmap_prepare_update(struct nilfs_bmap *, 237int nilfs_bmap_prepare_update_v(struct nilfs_bmap *,
197 union nilfs_bmap_ptr_req *, 238 union nilfs_bmap_ptr_req *,
198 union nilfs_bmap_ptr_req *); 239 union nilfs_bmap_ptr_req *);
199void nilfs_bmap_commit_update(struct nilfs_bmap *, 240void nilfs_bmap_commit_update_v(struct nilfs_bmap *,
200 union nilfs_bmap_ptr_req *, 241 union nilfs_bmap_ptr_req *,
201 union nilfs_bmap_ptr_req *); 242 union nilfs_bmap_ptr_req *);
202void nilfs_bmap_abort_update(struct nilfs_bmap *, 243void nilfs_bmap_abort_update_v(struct nilfs_bmap *,
203 union nilfs_bmap_ptr_req *, 244 union nilfs_bmap_ptr_req *,
204 union nilfs_bmap_ptr_req *); 245 union nilfs_bmap_ptr_req *);
205 246
206void nilfs_bmap_add_blocks(const struct nilfs_bmap *, int); 247void nilfs_bmap_add_blocks(const struct nilfs_bmap *, int);
207void nilfs_bmap_sub_blocks(const struct nilfs_bmap *, int); 248void nilfs_bmap_sub_blocks(const struct nilfs_bmap *, int);
208 249
209 250
210int nilfs_bmap_get_block(const struct nilfs_bmap *, __u64,
211 struct buffer_head **);
212void nilfs_bmap_put_block(const struct nilfs_bmap *, struct buffer_head *);
213int nilfs_bmap_get_new_block(const struct nilfs_bmap *, __u64,
214 struct buffer_head **);
215void nilfs_bmap_delete_block(const struct nilfs_bmap *, struct buffer_head *);
216
217
218/* Assume that bmap semaphore is locked. */ 251/* Assume that bmap semaphore is locked. */
219static inline int nilfs_bmap_dirty(const struct nilfs_bmap *bmap) 252static inline int nilfs_bmap_dirty(const struct nilfs_bmap *bmap)
220{ 253{
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-01 18:28:29 -0400