4 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
5 * http://www.samsung.com/
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
12 #include <linux/f2fs_fs.h>
13 #include <linux/mpage.h>
14 #include <linux/backing-dev.h>
15 #include <linux/blkdev.h>
16 #include <linux/pagevec.h>
17 #include <linux/swap.h>
22 #include <trace/events/f2fs.h>
24 static struct kmem_cache *nat_entry_slab;
25 static struct kmem_cache *free_nid_slab;
27 static void clear_node_page_dirty(struct page *page)
29 struct address_space *mapping = page->mapping;
30 struct f2fs_sb_info *sbi = F2FS_SB(mapping->host->i_sb);
31 unsigned int long flags;
33 if (PageDirty(page)) {
34 spin_lock_irqsave(&mapping->tree_lock, flags);
35 radix_tree_tag_clear(&mapping->page_tree,
38 spin_unlock_irqrestore(&mapping->tree_lock, flags);
40 clear_page_dirty_for_io(page);
41 dec_page_count(sbi, F2FS_DIRTY_NODES);
43 ClearPageUptodate(page);
46 static struct page *get_current_nat_page(struct f2fs_sb_info *sbi, nid_t nid)
48 pgoff_t index = current_nat_addr(sbi, nid);
49 return get_meta_page(sbi, index);
52 static struct page *get_next_nat_page(struct f2fs_sb_info *sbi, nid_t nid)
54 struct page *src_page;
55 struct page *dst_page;
60 struct f2fs_nm_info *nm_i = NM_I(sbi);
62 src_off = current_nat_addr(sbi, nid);
63 dst_off = next_nat_addr(sbi, src_off);
65 /* get current nat block page with lock */
66 src_page = get_meta_page(sbi, src_off);
68 /* Dirty src_page means that it is already the new target NAT page. */
69 if (PageDirty(src_page))
72 dst_page = grab_meta_page(sbi, dst_off);
74 src_addr = page_address(src_page);
75 dst_addr = page_address(dst_page);
76 memcpy(dst_addr, src_addr, PAGE_CACHE_SIZE);
77 set_page_dirty(dst_page);
78 f2fs_put_page(src_page, 1);
80 set_to_next_nat(nm_i, nid);
88 static void ra_nat_pages(struct f2fs_sb_info *sbi, int nid)
90 struct address_space *mapping = sbi->meta_inode->i_mapping;
91 struct f2fs_nm_info *nm_i = NM_I(sbi);
97 blk_start_plug(&plug);
99 for (i = 0; i < FREE_NID_PAGES; i++, nid += NAT_ENTRY_PER_BLOCK) {
100 if (nid >= nm_i->max_nid)
102 index = current_nat_addr(sbi, nid);
104 page = grab_cache_page(mapping, index);
107 if (PageUptodate(page)) {
108 f2fs_put_page(page, 1);
111 if (f2fs_readpage(sbi, page, index, READ))
114 f2fs_put_page(page, 0);
116 blk_finish_plug(&plug);
119 static struct nat_entry *__lookup_nat_cache(struct f2fs_nm_info *nm_i, nid_t n)
121 return radix_tree_lookup(&nm_i->nat_root, n);
124 static unsigned int __gang_lookup_nat_cache(struct f2fs_nm_info *nm_i,
125 nid_t start, unsigned int nr, struct nat_entry **ep)
127 return radix_tree_gang_lookup(&nm_i->nat_root, (void **)ep, start, nr);
130 static void __del_from_nat_cache(struct f2fs_nm_info *nm_i, struct nat_entry *e)
133 radix_tree_delete(&nm_i->nat_root, nat_get_nid(e));
135 kmem_cache_free(nat_entry_slab, e);
138 int is_checkpointed_node(struct f2fs_sb_info *sbi, nid_t nid)
140 struct f2fs_nm_info *nm_i = NM_I(sbi);
144 read_lock(&nm_i->nat_tree_lock);
145 e = __lookup_nat_cache(nm_i, nid);
146 if (e && !e->checkpointed)
148 read_unlock(&nm_i->nat_tree_lock);
152 static struct nat_entry *grab_nat_entry(struct f2fs_nm_info *nm_i, nid_t nid)
154 struct nat_entry *new;
156 new = kmem_cache_alloc(nat_entry_slab, GFP_ATOMIC);
159 if (radix_tree_insert(&nm_i->nat_root, nid, new)) {
160 kmem_cache_free(nat_entry_slab, new);
163 memset(new, 0, sizeof(struct nat_entry));
164 nat_set_nid(new, nid);
165 list_add_tail(&new->list, &nm_i->nat_entries);
170 static void cache_nat_entry(struct f2fs_nm_info *nm_i, nid_t nid,
171 struct f2fs_nat_entry *ne)
175 write_lock(&nm_i->nat_tree_lock);
176 e = __lookup_nat_cache(nm_i, nid);
178 e = grab_nat_entry(nm_i, nid);
180 write_unlock(&nm_i->nat_tree_lock);
183 nat_set_blkaddr(e, le32_to_cpu(ne->block_addr));
184 nat_set_ino(e, le32_to_cpu(ne->ino));
185 nat_set_version(e, ne->version);
186 e->checkpointed = true;
188 write_unlock(&nm_i->nat_tree_lock);
191 static void set_node_addr(struct f2fs_sb_info *sbi, struct node_info *ni,
194 struct f2fs_nm_info *nm_i = NM_I(sbi);
197 write_lock(&nm_i->nat_tree_lock);
198 e = __lookup_nat_cache(nm_i, ni->nid);
200 e = grab_nat_entry(nm_i, ni->nid);
202 write_unlock(&nm_i->nat_tree_lock);
206 e->checkpointed = true;
207 BUG_ON(ni->blk_addr == NEW_ADDR);
208 } else if (new_blkaddr == NEW_ADDR) {
210 * when nid is reallocated,
211 * previous nat entry can be remained in nat cache.
212 * So, reinitialize it with new information.
215 BUG_ON(ni->blk_addr != NULL_ADDR);
218 if (new_blkaddr == NEW_ADDR)
219 e->checkpointed = false;
222 BUG_ON(nat_get_blkaddr(e) != ni->blk_addr);
223 BUG_ON(nat_get_blkaddr(e) == NULL_ADDR &&
224 new_blkaddr == NULL_ADDR);
225 BUG_ON(nat_get_blkaddr(e) == NEW_ADDR &&
226 new_blkaddr == NEW_ADDR);
227 BUG_ON(nat_get_blkaddr(e) != NEW_ADDR &&
228 nat_get_blkaddr(e) != NULL_ADDR &&
229 new_blkaddr == NEW_ADDR);
231 /* increament version no as node is removed */
232 if (nat_get_blkaddr(e) != NEW_ADDR && new_blkaddr == NULL_ADDR) {
233 unsigned char version = nat_get_version(e);
234 nat_set_version(e, inc_node_version(version));
238 nat_set_blkaddr(e, new_blkaddr);
239 __set_nat_cache_dirty(nm_i, e);
240 write_unlock(&nm_i->nat_tree_lock);
243 static int try_to_free_nats(struct f2fs_sb_info *sbi, int nr_shrink)
245 struct f2fs_nm_info *nm_i = NM_I(sbi);
247 if (nm_i->nat_cnt <= NM_WOUT_THRESHOLD)
250 write_lock(&nm_i->nat_tree_lock);
251 while (nr_shrink && !list_empty(&nm_i->nat_entries)) {
252 struct nat_entry *ne;
253 ne = list_first_entry(&nm_i->nat_entries,
254 struct nat_entry, list);
255 __del_from_nat_cache(nm_i, ne);
258 write_unlock(&nm_i->nat_tree_lock);
263 * This function returns always success
265 void get_node_info(struct f2fs_sb_info *sbi, nid_t nid, struct node_info *ni)
267 struct f2fs_nm_info *nm_i = NM_I(sbi);
268 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA);
269 struct f2fs_summary_block *sum = curseg->sum_blk;
270 nid_t start_nid = START_NID(nid);
271 struct f2fs_nat_block *nat_blk;
272 struct page *page = NULL;
273 struct f2fs_nat_entry ne;
277 memset(&ne, 0, sizeof(struct f2fs_nat_entry));
280 /* Check nat cache */
281 read_lock(&nm_i->nat_tree_lock);
282 e = __lookup_nat_cache(nm_i, nid);
284 ni->ino = nat_get_ino(e);
285 ni->blk_addr = nat_get_blkaddr(e);
286 ni->version = nat_get_version(e);
288 read_unlock(&nm_i->nat_tree_lock);
292 /* Check current segment summary */
293 mutex_lock(&curseg->curseg_mutex);
294 i = lookup_journal_in_cursum(sum, NAT_JOURNAL, nid, 0);
296 ne = nat_in_journal(sum, i);
297 node_info_from_raw_nat(ni, &ne);
299 mutex_unlock(&curseg->curseg_mutex);
303 /* Fill node_info from nat page */
304 page = get_current_nat_page(sbi, start_nid);
305 nat_blk = (struct f2fs_nat_block *)page_address(page);
306 ne = nat_blk->entries[nid - start_nid];
307 node_info_from_raw_nat(ni, &ne);
308 f2fs_put_page(page, 1);
310 /* cache nat entry */
311 cache_nat_entry(NM_I(sbi), nid, &ne);
315 * The maximum depth is four.
316 * Offset[0] will have raw inode offset.
318 static int get_node_path(long block, int offset[4], unsigned int noffset[4])
320 const long direct_index = ADDRS_PER_INODE;
321 const long direct_blks = ADDRS_PER_BLOCK;
322 const long dptrs_per_blk = NIDS_PER_BLOCK;
323 const long indirect_blks = ADDRS_PER_BLOCK * NIDS_PER_BLOCK;
324 const long dindirect_blks = indirect_blks * NIDS_PER_BLOCK;
330 if (block < direct_index) {
334 block -= direct_index;
335 if (block < direct_blks) {
336 offset[n++] = NODE_DIR1_BLOCK;
342 block -= direct_blks;
343 if (block < direct_blks) {
344 offset[n++] = NODE_DIR2_BLOCK;
350 block -= direct_blks;
351 if (block < indirect_blks) {
352 offset[n++] = NODE_IND1_BLOCK;
354 offset[n++] = block / direct_blks;
355 noffset[n] = 4 + offset[n - 1];
356 offset[n] = block % direct_blks;
360 block -= indirect_blks;
361 if (block < indirect_blks) {
362 offset[n++] = NODE_IND2_BLOCK;
363 noffset[n] = 4 + dptrs_per_blk;
364 offset[n++] = block / direct_blks;
365 noffset[n] = 5 + dptrs_per_blk + offset[n - 1];
366 offset[n] = block % direct_blks;
370 block -= indirect_blks;
371 if (block < dindirect_blks) {
372 offset[n++] = NODE_DIND_BLOCK;
373 noffset[n] = 5 + (dptrs_per_blk * 2);
374 offset[n++] = block / indirect_blks;
375 noffset[n] = 6 + (dptrs_per_blk * 2) +
376 offset[n - 1] * (dptrs_per_blk + 1);
377 offset[n++] = (block / direct_blks) % dptrs_per_blk;
378 noffset[n] = 7 + (dptrs_per_blk * 2) +
379 offset[n - 2] * (dptrs_per_blk + 1) +
381 offset[n] = block % direct_blks;
392 * Caller should call f2fs_put_dnode(dn).
393 * Also, it should grab and release a mutex by calling mutex_lock_op() and
394 * mutex_unlock_op() only if ro is not set RDONLY_NODE.
395 * In the case of RDONLY_NODE, we don't need to care about mutex.
397 int get_dnode_of_data(struct dnode_of_data *dn, pgoff_t index, int mode)
399 struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb);
400 struct page *npage[4];
403 unsigned int noffset[4];
408 level = get_node_path(index, offset, noffset);
410 nids[0] = dn->inode->i_ino;
411 npage[0] = dn->inode_page;
414 npage[0] = get_node_page(sbi, nids[0]);
415 if (IS_ERR(npage[0]))
416 return PTR_ERR(npage[0]);
420 nids[1] = get_nid(parent, offset[0], true);
421 dn->inode_page = npage[0];
422 dn->inode_page_locked = true;
424 /* get indirect or direct nodes */
425 for (i = 1; i <= level; i++) {
428 if (!nids[i] && mode == ALLOC_NODE) {
430 if (!alloc_nid(sbi, &(nids[i]))) {
436 npage[i] = new_node_page(dn, noffset[i], NULL);
437 if (IS_ERR(npage[i])) {
438 alloc_nid_failed(sbi, nids[i]);
439 err = PTR_ERR(npage[i]);
443 set_nid(parent, offset[i - 1], nids[i], i == 1);
444 alloc_nid_done(sbi, nids[i]);
446 } else if (mode == LOOKUP_NODE_RA && i == level && level > 1) {
447 npage[i] = get_node_page_ra(parent, offset[i - 1]);
448 if (IS_ERR(npage[i])) {
449 err = PTR_ERR(npage[i]);
455 dn->inode_page_locked = false;
458 f2fs_put_page(parent, 1);
462 npage[i] = get_node_page(sbi, nids[i]);
463 if (IS_ERR(npage[i])) {
464 err = PTR_ERR(npage[i]);
465 f2fs_put_page(npage[0], 0);
471 nids[i + 1] = get_nid(parent, offset[i], false);
474 dn->nid = nids[level];
475 dn->ofs_in_node = offset[level];
476 dn->node_page = npage[level];
477 dn->data_blkaddr = datablock_addr(dn->node_page, dn->ofs_in_node);
481 f2fs_put_page(parent, 1);
483 f2fs_put_page(npage[0], 0);
485 dn->inode_page = NULL;
486 dn->node_page = NULL;
490 static void truncate_node(struct dnode_of_data *dn)
492 struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb);
495 get_node_info(sbi, dn->nid, &ni);
496 if (dn->inode->i_blocks == 0) {
497 BUG_ON(ni.blk_addr != NULL_ADDR);
500 BUG_ON(ni.blk_addr == NULL_ADDR);
502 /* Deallocate node address */
503 invalidate_blocks(sbi, ni.blk_addr);
504 dec_valid_node_count(sbi, dn->inode, 1);
505 set_node_addr(sbi, &ni, NULL_ADDR);
507 if (dn->nid == dn->inode->i_ino) {
508 remove_orphan_inode(sbi, dn->nid);
509 dec_valid_inode_count(sbi);
514 clear_node_page_dirty(dn->node_page);
515 F2FS_SET_SB_DIRT(sbi);
517 f2fs_put_page(dn->node_page, 1);
518 dn->node_page = NULL;
519 trace_f2fs_truncate_node(dn->inode, dn->nid, ni.blk_addr);
522 static int truncate_dnode(struct dnode_of_data *dn)
524 struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb);
530 /* get direct node */
531 page = get_node_page(sbi, dn->nid);
532 if (IS_ERR(page) && PTR_ERR(page) == -ENOENT)
534 else if (IS_ERR(page))
535 return PTR_ERR(page);
537 /* Make dnode_of_data for parameter */
538 dn->node_page = page;
540 truncate_data_blocks(dn);
545 static int truncate_nodes(struct dnode_of_data *dn, unsigned int nofs,
548 struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb);
549 struct dnode_of_data rdn = *dn;
551 struct f2fs_node *rn;
553 unsigned int child_nofs;
558 return NIDS_PER_BLOCK + 1;
560 trace_f2fs_truncate_nodes_enter(dn->inode, dn->nid, dn->data_blkaddr);
562 page = get_node_page(sbi, dn->nid);
564 trace_f2fs_truncate_nodes_exit(dn->inode, PTR_ERR(page));
565 return PTR_ERR(page);
568 rn = F2FS_NODE(page);
570 for (i = ofs; i < NIDS_PER_BLOCK; i++, freed++) {
571 child_nid = le32_to_cpu(rn->in.nid[i]);
575 ret = truncate_dnode(&rdn);
578 set_nid(page, i, 0, false);
581 child_nofs = nofs + ofs * (NIDS_PER_BLOCK + 1) + 1;
582 for (i = ofs; i < NIDS_PER_BLOCK; i++) {
583 child_nid = le32_to_cpu(rn->in.nid[i]);
584 if (child_nid == 0) {
585 child_nofs += NIDS_PER_BLOCK + 1;
589 ret = truncate_nodes(&rdn, child_nofs, 0, depth - 1);
590 if (ret == (NIDS_PER_BLOCK + 1)) {
591 set_nid(page, i, 0, false);
593 } else if (ret < 0 && ret != -ENOENT) {
601 /* remove current indirect node */
602 dn->node_page = page;
606 f2fs_put_page(page, 1);
608 trace_f2fs_truncate_nodes_exit(dn->inode, freed);
612 f2fs_put_page(page, 1);
613 trace_f2fs_truncate_nodes_exit(dn->inode, ret);
617 static int truncate_partial_nodes(struct dnode_of_data *dn,
618 struct f2fs_inode *ri, int *offset, int depth)
620 struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb);
621 struct page *pages[2];
628 nid[0] = le32_to_cpu(ri->i_nid[offset[0] - NODE_DIR1_BLOCK]);
632 /* get indirect nodes in the path */
633 for (i = 0; i < depth - 1; i++) {
634 /* refernece count'll be increased */
635 pages[i] = get_node_page(sbi, nid[i]);
636 if (IS_ERR(pages[i])) {
638 err = PTR_ERR(pages[i]);
641 nid[i + 1] = get_nid(pages[i], offset[i + 1], false);
644 /* free direct nodes linked to a partial indirect node */
645 for (i = offset[depth - 1]; i < NIDS_PER_BLOCK; i++) {
646 child_nid = get_nid(pages[idx], i, false);
650 err = truncate_dnode(dn);
653 set_nid(pages[idx], i, 0, false);
656 if (offset[depth - 1] == 0) {
657 dn->node_page = pages[idx];
661 f2fs_put_page(pages[idx], 1);
664 offset[depth - 1] = 0;
666 for (i = depth - 3; i >= 0; i--)
667 f2fs_put_page(pages[i], 1);
669 trace_f2fs_truncate_partial_nodes(dn->inode, nid, depth, err);
675 * All the block addresses of data and nodes should be nullified.
677 int truncate_inode_blocks(struct inode *inode, pgoff_t from)
679 struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
680 struct address_space *node_mapping = sbi->node_inode->i_mapping;
681 int err = 0, cont = 1;
682 int level, offset[4], noffset[4];
683 unsigned int nofs = 0;
684 struct f2fs_node *rn;
685 struct dnode_of_data dn;
688 trace_f2fs_truncate_inode_blocks_enter(inode, from);
690 level = get_node_path(from, offset, noffset);
692 page = get_node_page(sbi, inode->i_ino);
694 trace_f2fs_truncate_inode_blocks_exit(inode, PTR_ERR(page));
695 return PTR_ERR(page);
698 set_new_dnode(&dn, inode, page, NULL, 0);
701 rn = F2FS_NODE(page);
709 if (!offset[level - 1])
711 err = truncate_partial_nodes(&dn, &rn->i, offset, level);
712 if (err < 0 && err != -ENOENT)
714 nofs += 1 + NIDS_PER_BLOCK;
717 nofs = 5 + 2 * NIDS_PER_BLOCK;
718 if (!offset[level - 1])
720 err = truncate_partial_nodes(&dn, &rn->i, offset, level);
721 if (err < 0 && err != -ENOENT)
730 dn.nid = le32_to_cpu(rn->i.i_nid[offset[0] - NODE_DIR1_BLOCK]);
732 case NODE_DIR1_BLOCK:
733 case NODE_DIR2_BLOCK:
734 err = truncate_dnode(&dn);
737 case NODE_IND1_BLOCK:
738 case NODE_IND2_BLOCK:
739 err = truncate_nodes(&dn, nofs, offset[1], 2);
742 case NODE_DIND_BLOCK:
743 err = truncate_nodes(&dn, nofs, offset[1], 3);
750 if (err < 0 && err != -ENOENT)
752 if (offset[1] == 0 &&
753 rn->i.i_nid[offset[0] - NODE_DIR1_BLOCK]) {
755 if (page->mapping != node_mapping) {
756 f2fs_put_page(page, 1);
759 wait_on_page_writeback(page);
760 rn->i.i_nid[offset[0] - NODE_DIR1_BLOCK] = 0;
761 set_page_dirty(page);
769 f2fs_put_page(page, 0);
770 trace_f2fs_truncate_inode_blocks_exit(inode, err);
771 return err > 0 ? 0 : err;
775 * Caller should grab and release a mutex by calling mutex_lock_op() and
778 int remove_inode_page(struct inode *inode)
780 struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
782 nid_t ino = inode->i_ino;
783 struct dnode_of_data dn;
785 page = get_node_page(sbi, ino);
787 return PTR_ERR(page);
789 if (F2FS_I(inode)->i_xattr_nid) {
790 nid_t nid = F2FS_I(inode)->i_xattr_nid;
791 struct page *npage = get_node_page(sbi, nid);
794 return PTR_ERR(npage);
796 F2FS_I(inode)->i_xattr_nid = 0;
797 set_new_dnode(&dn, inode, page, npage, nid);
798 dn.inode_page_locked = 1;
802 /* 0 is possible, after f2fs_new_inode() is failed */
803 BUG_ON(inode->i_blocks != 0 && inode->i_blocks != 1);
804 set_new_dnode(&dn, inode, page, page, ino);
809 struct page *new_inode_page(struct inode *inode, const struct qstr *name)
811 struct dnode_of_data dn;
813 /* allocate inode page for new inode */
814 set_new_dnode(&dn, inode, NULL, NULL, inode->i_ino);
816 /* caller should f2fs_put_page(page, 1); */
817 return new_node_page(&dn, 0, NULL);
820 struct page *new_node_page(struct dnode_of_data *dn,
821 unsigned int ofs, struct page *ipage)
823 struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb);
824 struct address_space *mapping = sbi->node_inode->i_mapping;
825 struct node_info old_ni, new_ni;
829 if (is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC))
830 return ERR_PTR(-EPERM);
832 page = grab_cache_page(mapping, dn->nid);
834 return ERR_PTR(-ENOMEM);
836 if (!inc_valid_node_count(sbi, dn->inode, 1)) {
841 get_node_info(sbi, dn->nid, &old_ni);
843 /* Reinitialize old_ni with new node page */
844 BUG_ON(old_ni.blk_addr != NULL_ADDR);
846 new_ni.ino = dn->inode->i_ino;
847 set_node_addr(sbi, &new_ni, NEW_ADDR);
849 fill_node_footer(page, dn->nid, dn->inode->i_ino, ofs, true);
850 set_cold_node(dn->inode, page);
851 SetPageUptodate(page);
852 set_page_dirty(page);
854 if (ofs == XATTR_NODE_OFFSET)
855 F2FS_I(dn->inode)->i_xattr_nid = dn->nid;
857 dn->node_page = page;
859 update_inode(dn->inode, ipage);
863 inc_valid_inode_count(sbi);
868 clear_node_page_dirty(page);
869 f2fs_put_page(page, 1);
874 * Caller should do after getting the following values.
875 * 0: f2fs_put_page(page, 0)
876 * LOCKED_PAGE: f2fs_put_page(page, 1)
879 static int read_node_page(struct page *page, int type)
881 struct f2fs_sb_info *sbi = F2FS_SB(page->mapping->host->i_sb);
884 get_node_info(sbi, page->index, &ni);
886 if (ni.blk_addr == NULL_ADDR) {
887 f2fs_put_page(page, 1);
891 if (PageUptodate(page))
894 return f2fs_readpage(sbi, page, ni.blk_addr, type);
898 * Readahead a node page
900 void ra_node_page(struct f2fs_sb_info *sbi, nid_t nid)
902 struct address_space *mapping = sbi->node_inode->i_mapping;
906 apage = find_get_page(mapping, nid);
907 if (apage && PageUptodate(apage)) {
908 f2fs_put_page(apage, 0);
911 f2fs_put_page(apage, 0);
913 apage = grab_cache_page(mapping, nid);
917 err = read_node_page(apage, READA);
919 f2fs_put_page(apage, 0);
920 else if (err == LOCKED_PAGE)
921 f2fs_put_page(apage, 1);
924 struct page *get_node_page(struct f2fs_sb_info *sbi, pgoff_t nid)
926 struct address_space *mapping = sbi->node_inode->i_mapping;
930 page = grab_cache_page(mapping, nid);
932 return ERR_PTR(-ENOMEM);
934 err = read_node_page(page, READ_SYNC);
937 else if (err == LOCKED_PAGE)
941 if (!PageUptodate(page)) {
942 f2fs_put_page(page, 1);
943 return ERR_PTR(-EIO);
945 if (page->mapping != mapping) {
946 f2fs_put_page(page, 1);
950 BUG_ON(nid != nid_of_node(page));
951 mark_page_accessed(page);
956 * Return a locked page for the desired node page.
957 * And, readahead MAX_RA_NODE number of node pages.
959 struct page *get_node_page_ra(struct page *parent, int start)
961 struct f2fs_sb_info *sbi = F2FS_SB(parent->mapping->host->i_sb);
962 struct address_space *mapping = sbi->node_inode->i_mapping;
963 struct blk_plug plug;
968 /* First, try getting the desired direct node. */
969 nid = get_nid(parent, start, false);
971 return ERR_PTR(-ENOENT);
973 page = grab_cache_page(mapping, nid);
975 return ERR_PTR(-ENOMEM);
977 err = read_node_page(page, READ_SYNC);
980 else if (err == LOCKED_PAGE)
983 blk_start_plug(&plug);
985 /* Then, try readahead for siblings of the desired node */
986 end = start + MAX_RA_NODE;
987 end = min(end, NIDS_PER_BLOCK);
988 for (i = start + 1; i < end; i++) {
989 nid = get_nid(parent, i, false);
992 ra_node_page(sbi, nid);
995 blk_finish_plug(&plug);
998 if (page->mapping != mapping) {
999 f2fs_put_page(page, 1);
1003 if (!PageUptodate(page)) {
1004 f2fs_put_page(page, 1);
1005 return ERR_PTR(-EIO);
1007 mark_page_accessed(page);
1011 void sync_inode_page(struct dnode_of_data *dn)
1013 if (IS_INODE(dn->node_page) || dn->inode_page == dn->node_page) {
1014 update_inode(dn->inode, dn->node_page);
1015 } else if (dn->inode_page) {
1016 if (!dn->inode_page_locked)
1017 lock_page(dn->inode_page);
1018 update_inode(dn->inode, dn->inode_page);
1019 if (!dn->inode_page_locked)
1020 unlock_page(dn->inode_page);
1022 update_inode_page(dn->inode);
1026 int sync_node_pages(struct f2fs_sb_info *sbi, nid_t ino,
1027 struct writeback_control *wbc)
1029 struct address_space *mapping = sbi->node_inode->i_mapping;
1031 struct pagevec pvec;
1032 int step = ino ? 2 : 0;
1033 int nwritten = 0, wrote = 0;
1035 pagevec_init(&pvec, 0);
1041 while (index <= end) {
1043 nr_pages = pagevec_lookup_tag(&pvec, mapping, &index,
1044 PAGECACHE_TAG_DIRTY,
1045 min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1);
1049 for (i = 0; i < nr_pages; i++) {
1050 struct page *page = pvec.pages[i];
1053 * flushing sequence with step:
1058 if (step == 0 && IS_DNODE(page))
1060 if (step == 1 && (!IS_DNODE(page) ||
1061 is_cold_node(page)))
1063 if (step == 2 && (!IS_DNODE(page) ||
1064 !is_cold_node(page)))
1069 * we should not skip writing node pages.
1071 if (ino && ino_of_node(page) == ino)
1073 else if (!trylock_page(page))
1076 if (unlikely(page->mapping != mapping)) {
1081 if (ino && ino_of_node(page) != ino)
1082 goto continue_unlock;
1084 if (!PageDirty(page)) {
1085 /* someone wrote it for us */
1086 goto continue_unlock;
1089 if (!clear_page_dirty_for_io(page))
1090 goto continue_unlock;
1092 /* called by fsync() */
1093 if (ino && IS_DNODE(page)) {
1094 int mark = !is_checkpointed_node(sbi, ino);
1095 set_fsync_mark(page, 1);
1097 set_dentry_mark(page, mark);
1100 set_fsync_mark(page, 0);
1101 set_dentry_mark(page, 0);
1103 mapping->a_ops->writepage(page, wbc);
1106 if (--wbc->nr_to_write == 0)
1109 pagevec_release(&pvec);
1112 if (wbc->nr_to_write == 0) {
1124 f2fs_submit_bio(sbi, NODE, wbc->sync_mode == WB_SYNC_ALL);
1129 static int f2fs_write_node_page(struct page *page,
1130 struct writeback_control *wbc)
1132 struct f2fs_sb_info *sbi = F2FS_SB(page->mapping->host->i_sb);
1135 struct node_info ni;
1137 wait_on_page_writeback(page);
1139 /* get old block addr of this node page */
1140 nid = nid_of_node(page);
1141 BUG_ON(page->index != nid);
1143 get_node_info(sbi, nid, &ni);
1145 /* This page is already truncated */
1146 if (ni.blk_addr == NULL_ADDR) {
1147 dec_page_count(sbi, F2FS_DIRTY_NODES);
1152 if (wbc->for_reclaim) {
1153 dec_page_count(sbi, F2FS_DIRTY_NODES);
1154 wbc->pages_skipped++;
1155 set_page_dirty(page);
1156 return AOP_WRITEPAGE_ACTIVATE;
1159 mutex_lock(&sbi->node_write);
1160 set_page_writeback(page);
1161 write_node_page(sbi, page, nid, ni.blk_addr, &new_addr);
1162 set_node_addr(sbi, &ni, new_addr);
1163 dec_page_count(sbi, F2FS_DIRTY_NODES);
1164 mutex_unlock(&sbi->node_write);
1170 * It is very important to gather dirty pages and write at once, so that we can
1171 * submit a big bio without interfering other data writes.
1172 * Be default, 512 pages (2MB), a segment size, is quite reasonable.
1174 #define COLLECT_DIRTY_NODES 512
1175 static int f2fs_write_node_pages(struct address_space *mapping,
1176 struct writeback_control *wbc)
1178 struct f2fs_sb_info *sbi = F2FS_SB(mapping->host->i_sb);
1179 long nr_to_write = wbc->nr_to_write;
1181 /* First check balancing cached NAT entries */
1182 if (try_to_free_nats(sbi, NAT_ENTRY_PER_BLOCK)) {
1183 f2fs_sync_fs(sbi->sb, true);
1187 /* collect a number of dirty node pages and write together */
1188 if (get_pages(sbi, F2FS_DIRTY_NODES) < COLLECT_DIRTY_NODES)
1191 /* if mounting is failed, skip writing node pages */
1192 wbc->nr_to_write = max_hw_blocks(sbi);
1193 sync_node_pages(sbi, 0, wbc);
1194 wbc->nr_to_write = nr_to_write - (max_hw_blocks(sbi) - wbc->nr_to_write);
1198 static int f2fs_set_node_page_dirty(struct page *page)
1200 struct address_space *mapping = page->mapping;
1201 struct f2fs_sb_info *sbi = F2FS_SB(mapping->host->i_sb);
1203 SetPageUptodate(page);
1204 if (!PageDirty(page)) {
1205 __set_page_dirty_nobuffers(page);
1206 inc_page_count(sbi, F2FS_DIRTY_NODES);
1207 SetPagePrivate(page);
1213 static void f2fs_invalidate_node_page(struct page *page, unsigned int offset,
1214 unsigned int length)
1216 struct inode *inode = page->mapping->host;
1217 struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
1218 if (PageDirty(page))
1219 dec_page_count(sbi, F2FS_DIRTY_NODES);
1220 ClearPagePrivate(page);
1223 static int f2fs_release_node_page(struct page *page, gfp_t wait)
1225 ClearPagePrivate(page);
1230 * Structure of the f2fs node operations
1232 const struct address_space_operations f2fs_node_aops = {
1233 .writepage = f2fs_write_node_page,
1234 .writepages = f2fs_write_node_pages,
1235 .set_page_dirty = f2fs_set_node_page_dirty,
1236 .invalidatepage = f2fs_invalidate_node_page,
1237 .releasepage = f2fs_release_node_page,
1240 static struct free_nid *__lookup_free_nid_list(nid_t n, struct list_head *head)
1242 struct list_head *this;
1244 list_for_each(this, head) {
1245 i = list_entry(this, struct free_nid, list);
1252 static void __del_from_free_nid_list(struct free_nid *i)
1255 kmem_cache_free(free_nid_slab, i);
1258 static int add_free_nid(struct f2fs_nm_info *nm_i, nid_t nid, bool build)
1261 struct nat_entry *ne;
1262 bool allocated = false;
1264 if (nm_i->fcnt > 2 * MAX_FREE_NIDS)
1267 /* 0 nid should not be used */
1274 /* do not add allocated nids */
1275 read_lock(&nm_i->nat_tree_lock);
1276 ne = __lookup_nat_cache(nm_i, nid);
1277 if (ne && nat_get_blkaddr(ne) != NULL_ADDR)
1279 read_unlock(&nm_i->nat_tree_lock);
1283 i = kmem_cache_alloc(free_nid_slab, GFP_NOFS);
1291 spin_lock(&nm_i->free_nid_list_lock);
1292 if (__lookup_free_nid_list(nid, &nm_i->free_nid_list)) {
1293 spin_unlock(&nm_i->free_nid_list_lock);
1294 kmem_cache_free(free_nid_slab, i);
1297 list_add_tail(&i->list, &nm_i->free_nid_list);
1299 spin_unlock(&nm_i->free_nid_list_lock);
1303 static void remove_free_nid(struct f2fs_nm_info *nm_i, nid_t nid)
1306 spin_lock(&nm_i->free_nid_list_lock);
1307 i = __lookup_free_nid_list(nid, &nm_i->free_nid_list);
1308 if (i && i->state == NID_NEW) {
1309 __del_from_free_nid_list(i);
1312 spin_unlock(&nm_i->free_nid_list_lock);
1315 static void scan_nat_page(struct f2fs_nm_info *nm_i,
1316 struct page *nat_page, nid_t start_nid)
1318 struct f2fs_nat_block *nat_blk = page_address(nat_page);
1322 i = start_nid % NAT_ENTRY_PER_BLOCK;
1324 for (; i < NAT_ENTRY_PER_BLOCK; i++, start_nid++) {
1326 if (start_nid >= nm_i->max_nid)
1329 blk_addr = le32_to_cpu(nat_blk->entries[i].block_addr);
1330 BUG_ON(blk_addr == NEW_ADDR);
1331 if (blk_addr == NULL_ADDR) {
1332 if (add_free_nid(nm_i, start_nid, true) < 0)
1338 static void build_free_nids(struct f2fs_sb_info *sbi)
1340 struct f2fs_nm_info *nm_i = NM_I(sbi);
1341 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA);
1342 struct f2fs_summary_block *sum = curseg->sum_blk;
1344 nid_t nid = nm_i->next_scan_nid;
1346 /* Enough entries */
1347 if (nm_i->fcnt > NAT_ENTRY_PER_BLOCK)
1350 /* readahead nat pages to be scanned */
1351 ra_nat_pages(sbi, nid);
1354 struct page *page = get_current_nat_page(sbi, nid);
1356 scan_nat_page(nm_i, page, nid);
1357 f2fs_put_page(page, 1);
1359 nid += (NAT_ENTRY_PER_BLOCK - (nid % NAT_ENTRY_PER_BLOCK));
1360 if (nid >= nm_i->max_nid)
1363 if (i++ == FREE_NID_PAGES)
1367 /* go to the next free nat pages to find free nids abundantly */
1368 nm_i->next_scan_nid = nid;
1370 /* find free nids from current sum_pages */
1371 mutex_lock(&curseg->curseg_mutex);
1372 for (i = 0; i < nats_in_cursum(sum); i++) {
1373 block_t addr = le32_to_cpu(nat_in_journal(sum, i).block_addr);
1374 nid = le32_to_cpu(nid_in_journal(sum, i));
1375 if (addr == NULL_ADDR)
1376 add_free_nid(nm_i, nid, true);
1378 remove_free_nid(nm_i, nid);
1380 mutex_unlock(&curseg->curseg_mutex);
1384 * If this function returns success, caller can obtain a new nid
1385 * from second parameter of this function.
1386 * The returned nid could be used ino as well as nid when inode is created.
1388 bool alloc_nid(struct f2fs_sb_info *sbi, nid_t *nid)
1390 struct f2fs_nm_info *nm_i = NM_I(sbi);
1391 struct free_nid *i = NULL;
1392 struct list_head *this;
1394 if (sbi->total_valid_node_count + 1 >= nm_i->max_nid)
1397 spin_lock(&nm_i->free_nid_list_lock);
1399 /* We should not use stale free nids created by build_free_nids */
1400 if (nm_i->fcnt && !sbi->on_build_free_nids) {
1401 BUG_ON(list_empty(&nm_i->free_nid_list));
1402 list_for_each(this, &nm_i->free_nid_list) {
1403 i = list_entry(this, struct free_nid, list);
1404 if (i->state == NID_NEW)
1408 BUG_ON(i->state != NID_NEW);
1410 i->state = NID_ALLOC;
1412 spin_unlock(&nm_i->free_nid_list_lock);
1415 spin_unlock(&nm_i->free_nid_list_lock);
1417 /* Let's scan nat pages and its caches to get free nids */
1418 mutex_lock(&nm_i->build_lock);
1419 sbi->on_build_free_nids = 1;
1420 build_free_nids(sbi);
1421 sbi->on_build_free_nids = 0;
1422 mutex_unlock(&nm_i->build_lock);
1427 * alloc_nid() should be called prior to this function.
1429 void alloc_nid_done(struct f2fs_sb_info *sbi, nid_t nid)
1431 struct f2fs_nm_info *nm_i = NM_I(sbi);
1434 spin_lock(&nm_i->free_nid_list_lock);
1435 i = __lookup_free_nid_list(nid, &nm_i->free_nid_list);
1436 BUG_ON(!i || i->state != NID_ALLOC);
1437 __del_from_free_nid_list(i);
1438 spin_unlock(&nm_i->free_nid_list_lock);
1442 * alloc_nid() should be called prior to this function.
1444 void alloc_nid_failed(struct f2fs_sb_info *sbi, nid_t nid)
1446 struct f2fs_nm_info *nm_i = NM_I(sbi);
1449 spin_lock(&nm_i->free_nid_list_lock);
1450 i = __lookup_free_nid_list(nid, &nm_i->free_nid_list);
1451 BUG_ON(!i || i->state != NID_ALLOC);
1452 if (nm_i->fcnt > 2 * MAX_FREE_NIDS) {
1453 __del_from_free_nid_list(i);
1458 spin_unlock(&nm_i->free_nid_list_lock);
1461 void recover_node_page(struct f2fs_sb_info *sbi, struct page *page,
1462 struct f2fs_summary *sum, struct node_info *ni,
1463 block_t new_blkaddr)
1465 rewrite_node_page(sbi, page, sum, ni->blk_addr, new_blkaddr);
1466 set_node_addr(sbi, ni, new_blkaddr);
1467 clear_node_page_dirty(page);
1470 int recover_inode_page(struct f2fs_sb_info *sbi, struct page *page)
1472 struct address_space *mapping = sbi->node_inode->i_mapping;
1473 struct f2fs_node *src, *dst;
1474 nid_t ino = ino_of_node(page);
1475 struct node_info old_ni, new_ni;
1478 ipage = grab_cache_page(mapping, ino);
1482 /* Should not use this inode from free nid list */
1483 remove_free_nid(NM_I(sbi), ino);
1485 get_node_info(sbi, ino, &old_ni);
1486 SetPageUptodate(ipage);
1487 fill_node_footer(ipage, ino, ino, 0, true);
1489 src = F2FS_NODE(page);
1490 dst = F2FS_NODE(ipage);
1492 memcpy(dst, src, (unsigned long)&src->i.i_ext - (unsigned long)&src->i);
1494 dst->i.i_blocks = cpu_to_le64(1);
1495 dst->i.i_links = cpu_to_le32(1);
1496 dst->i.i_xattr_nid = 0;
1501 if (!inc_valid_node_count(sbi, NULL, 1))
1503 set_node_addr(sbi, &new_ni, NEW_ADDR);
1504 inc_valid_inode_count(sbi);
1505 f2fs_put_page(ipage, 1);
1509 int restore_node_summary(struct f2fs_sb_info *sbi,
1510 unsigned int segno, struct f2fs_summary_block *sum)
1512 struct f2fs_node *rn;
1513 struct f2fs_summary *sum_entry;
1518 /* alloc temporal page for read node */
1519 page = alloc_page(GFP_NOFS | __GFP_ZERO);
1521 return PTR_ERR(page);
1524 /* scan the node segment */
1525 last_offset = sbi->blocks_per_seg;
1526 addr = START_BLOCK(sbi, segno);
1527 sum_entry = &sum->entries[0];
1529 for (i = 0; i < last_offset; i++, sum_entry++) {
1531 * In order to read next node page,
1532 * we must clear PageUptodate flag.
1534 ClearPageUptodate(page);
1536 if (f2fs_readpage(sbi, page, addr, READ_SYNC))
1540 rn = F2FS_NODE(page);
1541 sum_entry->nid = rn->footer.nid;
1542 sum_entry->version = 0;
1543 sum_entry->ofs_in_node = 0;
1548 __free_pages(page, 0);
1552 static bool flush_nats_in_journal(struct f2fs_sb_info *sbi)
1554 struct f2fs_nm_info *nm_i = NM_I(sbi);
1555 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA);
1556 struct f2fs_summary_block *sum = curseg->sum_blk;
1559 mutex_lock(&curseg->curseg_mutex);
1561 if (nats_in_cursum(sum) < NAT_JOURNAL_ENTRIES) {
1562 mutex_unlock(&curseg->curseg_mutex);
1566 for (i = 0; i < nats_in_cursum(sum); i++) {
1567 struct nat_entry *ne;
1568 struct f2fs_nat_entry raw_ne;
1569 nid_t nid = le32_to_cpu(nid_in_journal(sum, i));
1571 raw_ne = nat_in_journal(sum, i);
1573 write_lock(&nm_i->nat_tree_lock);
1574 ne = __lookup_nat_cache(nm_i, nid);
1576 __set_nat_cache_dirty(nm_i, ne);
1577 write_unlock(&nm_i->nat_tree_lock);
1580 ne = grab_nat_entry(nm_i, nid);
1582 write_unlock(&nm_i->nat_tree_lock);
1585 nat_set_blkaddr(ne, le32_to_cpu(raw_ne.block_addr));
1586 nat_set_ino(ne, le32_to_cpu(raw_ne.ino));
1587 nat_set_version(ne, raw_ne.version);
1588 __set_nat_cache_dirty(nm_i, ne);
1589 write_unlock(&nm_i->nat_tree_lock);
1591 update_nats_in_cursum(sum, -i);
1592 mutex_unlock(&curseg->curseg_mutex);
1597 * This function is called during the checkpointing process.
1599 void flush_nat_entries(struct f2fs_sb_info *sbi)
1601 struct f2fs_nm_info *nm_i = NM_I(sbi);
1602 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA);
1603 struct f2fs_summary_block *sum = curseg->sum_blk;
1604 struct list_head *cur, *n;
1605 struct page *page = NULL;
1606 struct f2fs_nat_block *nat_blk = NULL;
1607 nid_t start_nid = 0, end_nid = 0;
1610 flushed = flush_nats_in_journal(sbi);
1613 mutex_lock(&curseg->curseg_mutex);
1615 /* 1) flush dirty nat caches */
1616 list_for_each_safe(cur, n, &nm_i->dirty_nat_entries) {
1617 struct nat_entry *ne;
1619 struct f2fs_nat_entry raw_ne;
1621 block_t new_blkaddr;
1623 ne = list_entry(cur, struct nat_entry, list);
1624 nid = nat_get_nid(ne);
1626 if (nat_get_blkaddr(ne) == NEW_ADDR)
1631 /* if there is room for nat enries in curseg->sumpage */
1632 offset = lookup_journal_in_cursum(sum, NAT_JOURNAL, nid, 1);
1634 raw_ne = nat_in_journal(sum, offset);
1638 if (!page || (start_nid > nid || nid > end_nid)) {
1640 f2fs_put_page(page, 1);
1643 start_nid = START_NID(nid);
1644 end_nid = start_nid + NAT_ENTRY_PER_BLOCK - 1;
1647 * get nat block with dirty flag, increased reference
1648 * count, mapped and lock
1650 page = get_next_nat_page(sbi, start_nid);
1651 nat_blk = page_address(page);
1655 raw_ne = nat_blk->entries[nid - start_nid];
1657 new_blkaddr = nat_get_blkaddr(ne);
1659 raw_ne.ino = cpu_to_le32(nat_get_ino(ne));
1660 raw_ne.block_addr = cpu_to_le32(new_blkaddr);
1661 raw_ne.version = nat_get_version(ne);
1664 nat_blk->entries[nid - start_nid] = raw_ne;
1666 nat_in_journal(sum, offset) = raw_ne;
1667 nid_in_journal(sum, offset) = cpu_to_le32(nid);
1670 if (nat_get_blkaddr(ne) == NULL_ADDR &&
1671 add_free_nid(NM_I(sbi), nid, false) <= 0) {
1672 write_lock(&nm_i->nat_tree_lock);
1673 __del_from_nat_cache(nm_i, ne);
1674 write_unlock(&nm_i->nat_tree_lock);
1676 write_lock(&nm_i->nat_tree_lock);
1677 __clear_nat_cache_dirty(nm_i, ne);
1678 ne->checkpointed = true;
1679 write_unlock(&nm_i->nat_tree_lock);
1683 mutex_unlock(&curseg->curseg_mutex);
1684 f2fs_put_page(page, 1);
1686 /* 2) shrink nat caches if necessary */
1687 try_to_free_nats(sbi, nm_i->nat_cnt - NM_WOUT_THRESHOLD);
1690 static int init_node_manager(struct f2fs_sb_info *sbi)
1692 struct f2fs_super_block *sb_raw = F2FS_RAW_SUPER(sbi);
1693 struct f2fs_nm_info *nm_i = NM_I(sbi);
1694 unsigned char *version_bitmap;
1695 unsigned int nat_segs, nat_blocks;
1697 nm_i->nat_blkaddr = le32_to_cpu(sb_raw->nat_blkaddr);
1699 /* segment_count_nat includes pair segment so divide to 2. */
1700 nat_segs = le32_to_cpu(sb_raw->segment_count_nat) >> 1;
1701 nat_blocks = nat_segs << le32_to_cpu(sb_raw->log_blocks_per_seg);
1702 nm_i->max_nid = NAT_ENTRY_PER_BLOCK * nat_blocks;
1706 INIT_LIST_HEAD(&nm_i->free_nid_list);
1707 INIT_RADIX_TREE(&nm_i->nat_root, GFP_ATOMIC);
1708 INIT_LIST_HEAD(&nm_i->nat_entries);
1709 INIT_LIST_HEAD(&nm_i->dirty_nat_entries);
1711 mutex_init(&nm_i->build_lock);
1712 spin_lock_init(&nm_i->free_nid_list_lock);
1713 rwlock_init(&nm_i->nat_tree_lock);
1715 nm_i->next_scan_nid = le32_to_cpu(sbi->ckpt->next_free_nid);
1716 nm_i->bitmap_size = __bitmap_size(sbi, NAT_BITMAP);
1717 version_bitmap = __bitmap_ptr(sbi, NAT_BITMAP);
1718 if (!version_bitmap)
1721 nm_i->nat_bitmap = kmemdup(version_bitmap, nm_i->bitmap_size,
1723 if (!nm_i->nat_bitmap)
1728 int build_node_manager(struct f2fs_sb_info *sbi)
1732 sbi->nm_info = kzalloc(sizeof(struct f2fs_nm_info), GFP_KERNEL);
1736 err = init_node_manager(sbi);
1740 build_free_nids(sbi);
1744 void destroy_node_manager(struct f2fs_sb_info *sbi)
1746 struct f2fs_nm_info *nm_i = NM_I(sbi);
1747 struct free_nid *i, *next_i;
1748 struct nat_entry *natvec[NATVEC_SIZE];
1755 /* destroy free nid list */
1756 spin_lock(&nm_i->free_nid_list_lock);
1757 list_for_each_entry_safe(i, next_i, &nm_i->free_nid_list, list) {
1758 BUG_ON(i->state == NID_ALLOC);
1759 __del_from_free_nid_list(i);
1763 spin_unlock(&nm_i->free_nid_list_lock);
1765 /* destroy nat cache */
1766 write_lock(&nm_i->nat_tree_lock);
1767 while ((found = __gang_lookup_nat_cache(nm_i,
1768 nid, NATVEC_SIZE, natvec))) {
1770 for (idx = 0; idx < found; idx++) {
1771 struct nat_entry *e = natvec[idx];
1772 nid = nat_get_nid(e) + 1;
1773 __del_from_nat_cache(nm_i, e);
1776 BUG_ON(nm_i->nat_cnt);
1777 write_unlock(&nm_i->nat_tree_lock);
1779 kfree(nm_i->nat_bitmap);
1780 sbi->nm_info = NULL;
1784 int __init create_node_manager_caches(void)
1786 nat_entry_slab = f2fs_kmem_cache_create("nat_entry",
1787 sizeof(struct nat_entry), NULL);
1788 if (!nat_entry_slab)
1791 free_nid_slab = f2fs_kmem_cache_create("free_nid",
1792 sizeof(struct free_nid), NULL);
1793 if (!free_nid_slab) {
1794 kmem_cache_destroy(nat_entry_slab);
1800 void destroy_node_manager_caches(void)
1802 kmem_cache_destroy(free_nid_slab);
1803 kmem_cache_destroy(nat_entry_slab);