diff options
Diffstat (limited to 'fs/nilfs2')
-rw-r--r-- | fs/nilfs2/bmap.c | 18 | ||||
-rw-r--r-- | fs/nilfs2/bmap.h | 8 |
2 files changed, 26 insertions, 0 deletions
diff --git a/fs/nilfs2/bmap.c b/fs/nilfs2/bmap.c index 3dbdc1d356bf..00244402d59e 100644 --- a/fs/nilfs2/bmap.c +++ b/fs/nilfs2/bmap.c | |||
@@ -548,3 +548,21 @@ void nilfs_bmap_commit_gcdat(struct nilfs_bmap *gcbmap, struct nilfs_bmap *bmap) | |||
548 | lockdep_set_class(&bmap->b_sem, &nilfs_bmap_dat_lock_key); | 548 | lockdep_set_class(&bmap->b_sem, &nilfs_bmap_dat_lock_key); |
549 | bmap->b_inode = &NILFS_BMAP_I(bmap)->vfs_inode; | 549 | bmap->b_inode = &NILFS_BMAP_I(bmap)->vfs_inode; |
550 | } | 550 | } |
551 | |||
552 | void nilfs_bmap_save(const struct nilfs_bmap *bmap, | ||
553 | struct nilfs_bmap_store *store) | ||
554 | { | ||
555 | memcpy(store->data, bmap->b_u.u_data, sizeof(store->data)); | ||
556 | store->last_allocated_key = bmap->b_last_allocated_key; | ||
557 | store->last_allocated_ptr = bmap->b_last_allocated_ptr; | ||
558 | store->state = bmap->b_state; | ||
559 | } | ||
560 | |||
561 | void nilfs_bmap_restore(struct nilfs_bmap *bmap, | ||
562 | const struct nilfs_bmap_store *store) | ||
563 | { | ||
564 | memcpy(bmap->b_u.u_data, store->data, sizeof(store->data)); | ||
565 | bmap->b_last_allocated_key = store->last_allocated_key; | ||
566 | bmap->b_last_allocated_ptr = store->last_allocated_ptr; | ||
567 | bmap->b_state = store->state; | ||
568 | } | ||
diff --git a/fs/nilfs2/bmap.h b/fs/nilfs2/bmap.h index a20569b19929..5f3339e3eac9 100644 --- a/fs/nilfs2/bmap.h +++ b/fs/nilfs2/bmap.h | |||
@@ -135,6 +135,12 @@ struct nilfs_bmap { | |||
135 | /* state */ | 135 | /* state */ |
136 | #define NILFS_BMAP_DIRTY 0x00000001 | 136 | #define NILFS_BMAP_DIRTY 0x00000001 |
137 | 137 | ||
138 | struct nilfs_bmap_store { | ||
139 | __le64 data[NILFS_BMAP_SIZE / sizeof(__le64)]; | ||
140 | __u64 last_allocated_key; | ||
141 | __u64 last_allocated_ptr; | ||
142 | int state; | ||
143 | }; | ||
138 | 144 | ||
139 | int nilfs_bmap_test_and_clear_dirty(struct nilfs_bmap *); | 145 | int nilfs_bmap_test_and_clear_dirty(struct nilfs_bmap *); |
140 | int nilfs_bmap_read(struct nilfs_bmap *, struct nilfs_inode *); | 146 | int nilfs_bmap_read(struct nilfs_bmap *, struct nilfs_inode *); |
@@ -156,6 +162,8 @@ void nilfs_bmap_init_gc(struct nilfs_bmap *); | |||
156 | void nilfs_bmap_init_gcdat(struct nilfs_bmap *, struct nilfs_bmap *); | 162 | void nilfs_bmap_init_gcdat(struct nilfs_bmap *, struct nilfs_bmap *); |
157 | void nilfs_bmap_commit_gcdat(struct nilfs_bmap *, struct nilfs_bmap *); | 163 | void nilfs_bmap_commit_gcdat(struct nilfs_bmap *, struct nilfs_bmap *); |
158 | 164 | ||
165 | void nilfs_bmap_save(const struct nilfs_bmap *, struct nilfs_bmap_store *); | ||
166 | void nilfs_bmap_restore(struct nilfs_bmap *, const struct nilfs_bmap_store *); | ||
159 | 167 | ||
160 | static inline int nilfs_bmap_lookup(struct nilfs_bmap *bmap, __u64 key, | 168 | static inline int nilfs_bmap_lookup(struct nilfs_bmap *bmap, __u64 key, |
161 | __u64 *ptr) | 169 | __u64 *ptr) |