Lines Matching defs:bmap
14 #include "bmap.h"
22 struct inode *nilfs_bmap_get_dat(const struct nilfs_bmap *bmap)
24 struct the_nilfs *nilfs = bmap->b_inode->i_sb->s_fs_info;
29 static int nilfs_bmap_convert_error(struct nilfs_bmap *bmap,
32 struct inode *inode = bmap->b_inode;
36 "broken bmap (inode number=%lu)", inode->i_ino);
44 * @bmap: bmap
50 * matches @key in the block at @level of the bmap. The record associated
59 int nilfs_bmap_lookup_at_level(struct nilfs_bmap *bmap, __u64 key, int level,
65 down_read(&bmap->b_sem);
66 ret = bmap->b_ops->bop_lookup(bmap, key, level, ptrp);
70 if (NILFS_BMAP_USE_VBN(bmap)) {
71 ret = nilfs_dat_translate(nilfs_bmap_get_dat(bmap), *ptrp,
87 up_read(&bmap->b_sem);
88 return nilfs_bmap_convert_error(bmap, __func__, ret);
91 int nilfs_bmap_lookup_contig(struct nilfs_bmap *bmap, __u64 key, __u64 *ptrp,
96 down_read(&bmap->b_sem);
97 ret = bmap->b_ops->bop_lookup_contig(bmap, key, ptrp, maxblocks);
98 up_read(&bmap->b_sem);
100 return nilfs_bmap_convert_error(bmap, __func__, ret);
103 static int nilfs_bmap_do_insert(struct nilfs_bmap *bmap, __u64 key, __u64 ptr)
109 if (bmap->b_ops->bop_check_insert != NULL) {
110 ret = bmap->b_ops->bop_check_insert(bmap, key);
112 n = bmap->b_ops->bop_gather_data(
113 bmap, keys, ptrs, NILFS_BMAP_SMALL_HIGH + 1);
117 bmap, key, ptr, keys, ptrs, n);
119 bmap->b_u.u_flags |= NILFS_BMAP_LARGE;
126 return bmap->b_ops->bop_insert(bmap, key, ptr);
130 * nilfs_bmap_insert - insert a new key-record pair into a bmap
131 * @bmap: bmap
136 * by @key and @rec into @bmap.
144 int nilfs_bmap_insert(struct nilfs_bmap *bmap, __u64 key, unsigned long rec)
148 down_write(&bmap->b_sem);
149 ret = nilfs_bmap_do_insert(bmap, key, rec);
150 up_write(&bmap->b_sem);
152 return nilfs_bmap_convert_error(bmap, __func__, ret);
155 static int nilfs_bmap_do_delete(struct nilfs_bmap *bmap, __u64 key)
161 if (bmap->b_ops->bop_check_delete != NULL) {
162 ret = bmap->b_ops->bop_check_delete(bmap, key);
164 n = bmap->b_ops->bop_gather_data(
165 bmap, keys, ptrs, NILFS_BMAP_LARGE_LOW + 1);
169 bmap, key, keys, ptrs, n);
171 bmap->b_u.u_flags &= ~NILFS_BMAP_LARGE;
178 return bmap->b_ops->bop_delete(bmap, key);
183 * @bmap: bmap struct
187 * Description: nilfs_bmap_seek_key() seeks a valid key on @bmap
196 int nilfs_bmap_seek_key(struct nilfs_bmap *bmap, __u64 start, __u64 *keyp)
200 down_read(&bmap->b_sem);
201 ret = bmap->b_ops->bop_seek_key(bmap, start, keyp);
202 up_read(&bmap->b_sem);
205 ret = nilfs_bmap_convert_error(bmap, __func__, ret);
209 int nilfs_bmap_last_key(struct nilfs_bmap *bmap, __u64 *keyp)
213 down_read(&bmap->b_sem);
214 ret = bmap->b_ops->bop_last_key(bmap, keyp);
215 up_read(&bmap->b_sem);
218 ret = nilfs_bmap_convert_error(bmap, __func__, ret);
223 * nilfs_bmap_delete - delete a key-record pair from a bmap
224 * @bmap: bmap
228 * @key from @bmap.
236 int nilfs_bmap_delete(struct nilfs_bmap *bmap, __u64 key)
240 down_write(&bmap->b_sem);
241 ret = nilfs_bmap_do_delete(bmap, key);
242 up_write(&bmap->b_sem);
244 return nilfs_bmap_convert_error(bmap, __func__, ret);
247 static int nilfs_bmap_do_truncate(struct nilfs_bmap *bmap, __u64 key)
252 ret = bmap->b_ops->bop_last_key(bmap, &lastkey);
260 ret = nilfs_bmap_do_delete(bmap, lastkey);
263 ret = bmap->b_ops->bop_last_key(bmap, &lastkey);
274 * nilfs_bmap_truncate - truncate a bmap to a specified key
275 * @bmap: bmap
279 * greater than or equal to @key from @bmap.
286 int nilfs_bmap_truncate(struct nilfs_bmap *bmap, __u64 key)
290 down_write(&bmap->b_sem);
291 ret = nilfs_bmap_do_truncate(bmap, key);
292 up_write(&bmap->b_sem);
294 return nilfs_bmap_convert_error(bmap, __func__, ret);
298 * nilfs_bmap_clear - free resources a bmap holds
299 * @bmap: bmap
301 * Description: nilfs_bmap_clear() frees resources associated with @bmap.
303 void nilfs_bmap_clear(struct nilfs_bmap *bmap)
305 down_write(&bmap->b_sem);
306 if (bmap->b_ops->bop_clear != NULL)
307 bmap->b_ops->bop_clear(bmap);
308 up_write(&bmap->b_sem);
313 * @bmap: bmap
324 int nilfs_bmap_propagate(struct nilfs_bmap *bmap, struct buffer_head *bh)
328 down_write(&bmap->b_sem);
329 ret = bmap->b_ops->bop_propagate(bmap, bh);
330 up_write(&bmap->b_sem);
332 return nilfs_bmap_convert_error(bmap, __func__, ret);
337 * @bmap: bmap
340 void nilfs_bmap_lookup_dirty_buffers(struct nilfs_bmap *bmap,
343 if (bmap->b_ops->bop_lookup_dirty_buffers != NULL)
344 bmap->b_ops->bop_lookup_dirty_buffers(bmap, listp);
349 * @bmap: bmap
366 int nilfs_bmap_assign(struct nilfs_bmap *bmap,
373 down_write(&bmap->b_sem);
374 ret = bmap->b_ops->bop_assign(bmap, bh, blocknr, binfo);
375 up_write(&bmap->b_sem);
377 return nilfs_bmap_convert_error(bmap, __func__, ret);
382 * @bmap: bmap
394 int nilfs_bmap_mark(struct nilfs_bmap *bmap, __u64 key, int level)
398 if (bmap->b_ops->bop_mark == NULL)
401 down_write(&bmap->b_sem);
402 ret = bmap->b_ops->bop_mark(bmap, key, level);
403 up_write(&bmap->b_sem);
405 return nilfs_bmap_convert_error(bmap, __func__, ret);
409 * nilfs_bmap_test_and_clear_dirty - test and clear a bmap dirty state
410 * @bmap: bmap
413 * clear the dirty state of @bmap.
415 * Return: 1 if @bmap is dirty, or 0 if clear.
417 int nilfs_bmap_test_and_clear_dirty(struct nilfs_bmap *bmap)
421 down_write(&bmap->b_sem);
422 ret = nilfs_bmap_dirty(bmap);
423 nilfs_bmap_clear_dirty(bmap);
424 up_write(&bmap->b_sem);
432 __u64 nilfs_bmap_data_get_key(const struct nilfs_bmap *bmap,
437 return pos >> bmap->b_inode->i_blkbits;
440 __u64 nilfs_bmap_find_target_seq(const struct nilfs_bmap *bmap, __u64 key)
444 diff = key - bmap->b_last_allocated_key;
446 (bmap->b_last_allocated_ptr != NILFS_BMAP_INVALID_PTR) &&
447 (bmap->b_last_allocated_ptr + diff > 0))
448 return bmap->b_last_allocated_ptr + diff;
454 __u64 nilfs_bmap_find_target_in_group(const struct nilfs_bmap *bmap)
456 struct inode *dat = nilfs_bmap_get_dat(bmap);
458 unsigned long group = bmap->b_inode->i_ino / entries_per_group;
461 (bmap->b_inode->i_ino % NILFS_BMAP_GROUP_DIV) *
469 * nilfs_bmap_read - read a bmap from an inode
470 * @bmap: bmap
473 * Description: nilfs_bmap_read() initializes the bmap @bmap.
477 * * %-EIO - I/O error (corrupted bmap).
480 int nilfs_bmap_read(struct nilfs_bmap *bmap, struct nilfs_inode *raw_inode)
483 memset(bmap->b_u.u_data, 0, NILFS_BMAP_SIZE);
485 memcpy(bmap->b_u.u_data, raw_inode->i_bmap, NILFS_BMAP_SIZE);
487 init_rwsem(&bmap->b_sem);
488 bmap->b_state = 0;
489 bmap->b_inode = &NILFS_BMAP_I(bmap)->vfs_inode;
490 switch (bmap->b_inode->i_ino) {
492 bmap->b_ptr_type = NILFS_BMAP_PTR_P;
493 bmap->b_last_allocated_key = 0;
494 bmap->b_last_allocated_ptr = NILFS_BMAP_NEW_PTR_INIT;
495 lockdep_set_class(&bmap->b_sem, &nilfs_bmap_dat_lock_key);
499 bmap->b_ptr_type = NILFS_BMAP_PTR_VS;
500 bmap->b_last_allocated_key = 0;
501 bmap->b_last_allocated_ptr = NILFS_BMAP_INVALID_PTR;
502 lockdep_set_class(&bmap->b_sem, &nilfs_bmap_mdt_lock_key);
505 lockdep_set_class(&bmap->b_sem, &nilfs_bmap_mdt_lock_key);
508 bmap->b_ptr_type = NILFS_BMAP_PTR_VM;
509 bmap->b_last_allocated_key = 0;
510 bmap->b_last_allocated_ptr = NILFS_BMAP_INVALID_PTR;
514 return (bmap->b_u.u_flags & NILFS_BMAP_LARGE) ?
515 nilfs_btree_init(bmap) : nilfs_direct_init(bmap);
519 * nilfs_bmap_write - write back a bmap to an inode
520 * @bmap: bmap
523 * Description: nilfs_bmap_write() stores @bmap in @raw_inode.
525 void nilfs_bmap_write(struct nilfs_bmap *bmap, struct nilfs_inode *raw_inode)
527 memcpy(raw_inode->i_bmap, bmap->b_u.u_data,
529 if (bmap->b_inode->i_ino == NILFS_DAT_INO)
530 bmap->b_last_allocated_ptr = NILFS_BMAP_NEW_PTR_INIT;
533 void nilfs_bmap_init_gc(struct nilfs_bmap *bmap)
535 memset(&bmap->b_u, 0, NILFS_BMAP_SIZE);
536 init_rwsem(&bmap->b_sem);
537 bmap->b_inode = &NILFS_BMAP_I(bmap)->vfs_inode;
538 bmap->b_ptr_type = NILFS_BMAP_PTR_U;
539 bmap->b_last_allocated_key = 0;
540 bmap->b_last_allocated_ptr = NILFS_BMAP_INVALID_PTR;
541 bmap->b_state = 0;
542 nilfs_btree_init_gc(bmap);
545 void nilfs_bmap_save(const struct nilfs_bmap *bmap,
548 memcpy(store->data, bmap->b_u.u_data, sizeof(store->data));
549 store->last_allocated_key = bmap->b_last_allocated_key;
550 store->last_allocated_ptr = bmap->b_last_allocated_ptr;
551 store->state = bmap->b_state;
554 void nilfs_bmap_restore(struct nilfs_bmap *bmap,
557 memcpy(bmap->b_u.u_data, store->data, sizeof(store->data));
558 bmap->b_last_allocated_key = store->last_allocated_key;
559 bmap->b_last_allocated_ptr = store->last_allocated_ptr;
560 bmap->b_state = store->state;