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>
23 #include <trace/events/f2fs.h>
25 #define on_build_free_nids(nmi) mutex_is_locked(&nm_i->build_lock)
27 static struct kmem_cache *nat_entry_slab;
28 static struct kmem_cache *free_nid_slab;
29 static struct kmem_cache *nat_entry_set_slab;
31 bool available_free_memory(struct f2fs_sb_info *sbi, int type)
33 struct f2fs_nm_info *nm_i = NM_I(sbi);
35 unsigned long avail_ram;
36 unsigned long mem_size = 0;
41 /* only uses low memory */
42 avail_ram = val.totalram - val.totalhigh;
44 /* give 25%, 25%, 50%, 50% memory for each components respectively */
45 if (type == FREE_NIDS) {
46 mem_size = (nm_i->fcnt * sizeof(struct free_nid)) >>
48 res = mem_size < ((avail_ram * nm_i->ram_thresh / 100) >> 2);
49 } else if (type == NAT_ENTRIES) {
50 mem_size = (nm_i->nat_cnt * sizeof(struct nat_entry)) >>
52 res = mem_size < ((avail_ram * nm_i->ram_thresh / 100) >> 2);
53 } else if (type == DIRTY_DENTS) {
54 if (sbi->sb->s_bdi->dirty_exceeded)
56 mem_size = get_pages(sbi, F2FS_DIRTY_DENTS);
57 res = mem_size < ((avail_ram * nm_i->ram_thresh / 100) >> 1);
58 } else if (type == INO_ENTRIES) {
61 for (i = 0; i <= UPDATE_INO; i++)
62 mem_size += (sbi->im[i].ino_num *
63 sizeof(struct ino_entry)) >> PAGE_CACHE_SHIFT;
64 res = mem_size < ((avail_ram * nm_i->ram_thresh / 100) >> 1);
66 if (sbi->sb->s_bdi->dirty_exceeded)
72 static void clear_node_page_dirty(struct page *page)
74 struct address_space *mapping = page->mapping;
75 unsigned int long flags;
77 if (PageDirty(page)) {
78 spin_lock_irqsave(&mapping->tree_lock, flags);
79 radix_tree_tag_clear(&mapping->page_tree,
82 spin_unlock_irqrestore(&mapping->tree_lock, flags);
84 clear_page_dirty_for_io(page);
85 dec_page_count(F2FS_M_SB(mapping), F2FS_DIRTY_NODES);
87 ClearPageUptodate(page);
90 static struct page *get_current_nat_page(struct f2fs_sb_info *sbi, nid_t nid)
92 pgoff_t index = current_nat_addr(sbi, nid);
93 return get_meta_page(sbi, index);
96 static struct page *get_next_nat_page(struct f2fs_sb_info *sbi, nid_t nid)
98 struct page *src_page;
99 struct page *dst_page;
104 struct f2fs_nm_info *nm_i = NM_I(sbi);
106 src_off = current_nat_addr(sbi, nid);
107 dst_off = next_nat_addr(sbi, src_off);
109 /* get current nat block page with lock */
110 src_page = get_meta_page(sbi, src_off);
111 dst_page = grab_meta_page(sbi, dst_off);
112 f2fs_bug_on(sbi, PageDirty(src_page));
114 src_addr = page_address(src_page);
115 dst_addr = page_address(dst_page);
116 memcpy(dst_addr, src_addr, PAGE_CACHE_SIZE);
117 set_page_dirty(dst_page);
118 f2fs_put_page(src_page, 1);
120 set_to_next_nat(nm_i, nid);
125 static struct nat_entry *__lookup_nat_cache(struct f2fs_nm_info *nm_i, nid_t n)
127 return radix_tree_lookup(&nm_i->nat_root, n);
130 static unsigned int __gang_lookup_nat_cache(struct f2fs_nm_info *nm_i,
131 nid_t start, unsigned int nr, struct nat_entry **ep)
133 return radix_tree_gang_lookup(&nm_i->nat_root, (void **)ep, start, nr);
136 static void __del_from_nat_cache(struct f2fs_nm_info *nm_i, struct nat_entry *e)
139 radix_tree_delete(&nm_i->nat_root, nat_get_nid(e));
141 kmem_cache_free(nat_entry_slab, e);
144 static void __set_nat_cache_dirty(struct f2fs_nm_info *nm_i,
145 struct nat_entry *ne)
147 nid_t set = NAT_BLOCK_OFFSET(ne->ni.nid);
148 struct nat_entry_set *head;
150 if (get_nat_flag(ne, IS_DIRTY))
153 head = radix_tree_lookup(&nm_i->nat_set_root, set);
155 head = f2fs_kmem_cache_alloc(nat_entry_set_slab, GFP_ATOMIC);
157 INIT_LIST_HEAD(&head->entry_list);
158 INIT_LIST_HEAD(&head->set_list);
161 f2fs_radix_tree_insert(&nm_i->nat_set_root, set, head);
163 list_move_tail(&ne->list, &head->entry_list);
164 nm_i->dirty_nat_cnt++;
166 set_nat_flag(ne, IS_DIRTY, true);
169 static void __clear_nat_cache_dirty(struct f2fs_nm_info *nm_i,
170 struct nat_entry *ne)
172 nid_t set = NAT_BLOCK_OFFSET(ne->ni.nid);
173 struct nat_entry_set *head;
175 head = radix_tree_lookup(&nm_i->nat_set_root, set);
177 list_move_tail(&ne->list, &nm_i->nat_entries);
178 set_nat_flag(ne, IS_DIRTY, false);
180 nm_i->dirty_nat_cnt--;
184 static unsigned int __gang_lookup_nat_set(struct f2fs_nm_info *nm_i,
185 nid_t start, unsigned int nr, struct nat_entry_set **ep)
187 return radix_tree_gang_lookup(&nm_i->nat_set_root, (void **)ep,
191 bool is_checkpointed_node(struct f2fs_sb_info *sbi, nid_t nid)
193 struct f2fs_nm_info *nm_i = NM_I(sbi);
197 down_read(&nm_i->nat_tree_lock);
198 e = __lookup_nat_cache(nm_i, nid);
199 if (e && !get_nat_flag(e, IS_CHECKPOINTED))
201 up_read(&nm_i->nat_tree_lock);
205 bool has_fsynced_inode(struct f2fs_sb_info *sbi, nid_t ino)
207 struct f2fs_nm_info *nm_i = NM_I(sbi);
209 bool fsynced = false;
211 down_read(&nm_i->nat_tree_lock);
212 e = __lookup_nat_cache(nm_i, ino);
213 if (e && get_nat_flag(e, HAS_FSYNCED_INODE))
215 up_read(&nm_i->nat_tree_lock);
219 bool need_inode_block_update(struct f2fs_sb_info *sbi, nid_t ino)
221 struct f2fs_nm_info *nm_i = NM_I(sbi);
223 bool need_update = true;
225 down_read(&nm_i->nat_tree_lock);
226 e = __lookup_nat_cache(nm_i, ino);
227 if (e && get_nat_flag(e, HAS_LAST_FSYNC) &&
228 (get_nat_flag(e, IS_CHECKPOINTED) ||
229 get_nat_flag(e, HAS_FSYNCED_INODE)))
231 up_read(&nm_i->nat_tree_lock);
235 static struct nat_entry *grab_nat_entry(struct f2fs_nm_info *nm_i, nid_t nid)
237 struct nat_entry *new;
239 new = f2fs_kmem_cache_alloc(nat_entry_slab, GFP_ATOMIC);
240 f2fs_radix_tree_insert(&nm_i->nat_root, nid, new);
241 memset(new, 0, sizeof(struct nat_entry));
242 nat_set_nid(new, nid);
244 list_add_tail(&new->list, &nm_i->nat_entries);
249 static void cache_nat_entry(struct f2fs_nm_info *nm_i, nid_t nid,
250 struct f2fs_nat_entry *ne)
254 down_write(&nm_i->nat_tree_lock);
255 e = __lookup_nat_cache(nm_i, nid);
257 e = grab_nat_entry(nm_i, nid);
258 node_info_from_raw_nat(&e->ni, ne);
260 up_write(&nm_i->nat_tree_lock);
263 static void set_node_addr(struct f2fs_sb_info *sbi, struct node_info *ni,
264 block_t new_blkaddr, bool fsync_done)
266 struct f2fs_nm_info *nm_i = NM_I(sbi);
269 down_write(&nm_i->nat_tree_lock);
270 e = __lookup_nat_cache(nm_i, ni->nid);
272 e = grab_nat_entry(nm_i, ni->nid);
273 copy_node_info(&e->ni, ni);
274 f2fs_bug_on(sbi, ni->blk_addr == NEW_ADDR);
275 } else if (new_blkaddr == NEW_ADDR) {
277 * when nid is reallocated,
278 * previous nat entry can be remained in nat cache.
279 * So, reinitialize it with new information.
281 copy_node_info(&e->ni, ni);
282 f2fs_bug_on(sbi, ni->blk_addr != NULL_ADDR);
286 f2fs_bug_on(sbi, nat_get_blkaddr(e) != ni->blk_addr);
287 f2fs_bug_on(sbi, nat_get_blkaddr(e) == NULL_ADDR &&
288 new_blkaddr == NULL_ADDR);
289 f2fs_bug_on(sbi, nat_get_blkaddr(e) == NEW_ADDR &&
290 new_blkaddr == NEW_ADDR);
291 f2fs_bug_on(sbi, nat_get_blkaddr(e) != NEW_ADDR &&
292 nat_get_blkaddr(e) != NULL_ADDR &&
293 new_blkaddr == NEW_ADDR);
295 /* increment version no as node is removed */
296 if (nat_get_blkaddr(e) != NEW_ADDR && new_blkaddr == NULL_ADDR) {
297 unsigned char version = nat_get_version(e);
298 nat_set_version(e, inc_node_version(version));
302 nat_set_blkaddr(e, new_blkaddr);
303 if (new_blkaddr == NEW_ADDR || new_blkaddr == NULL_ADDR)
304 set_nat_flag(e, IS_CHECKPOINTED, false);
305 __set_nat_cache_dirty(nm_i, e);
307 /* update fsync_mark if its inode nat entry is still alive */
308 e = __lookup_nat_cache(nm_i, ni->ino);
310 if (fsync_done && ni->nid == ni->ino)
311 set_nat_flag(e, HAS_FSYNCED_INODE, true);
312 set_nat_flag(e, HAS_LAST_FSYNC, fsync_done);
314 up_write(&nm_i->nat_tree_lock);
317 int try_to_free_nats(struct f2fs_sb_info *sbi, int nr_shrink)
319 struct f2fs_nm_info *nm_i = NM_I(sbi);
321 if (available_free_memory(sbi, NAT_ENTRIES))
324 down_write(&nm_i->nat_tree_lock);
325 while (nr_shrink && !list_empty(&nm_i->nat_entries)) {
326 struct nat_entry *ne;
327 ne = list_first_entry(&nm_i->nat_entries,
328 struct nat_entry, list);
329 __del_from_nat_cache(nm_i, ne);
332 up_write(&nm_i->nat_tree_lock);
337 * This function always returns success
339 void get_node_info(struct f2fs_sb_info *sbi, nid_t nid, struct node_info *ni)
341 struct f2fs_nm_info *nm_i = NM_I(sbi);
342 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA);
343 struct f2fs_summary_block *sum = curseg->sum_blk;
344 nid_t start_nid = START_NID(nid);
345 struct f2fs_nat_block *nat_blk;
346 struct page *page = NULL;
347 struct f2fs_nat_entry ne;
353 /* Check nat cache */
354 down_read(&nm_i->nat_tree_lock);
355 e = __lookup_nat_cache(nm_i, nid);
357 ni->ino = nat_get_ino(e);
358 ni->blk_addr = nat_get_blkaddr(e);
359 ni->version = nat_get_version(e);
361 up_read(&nm_i->nat_tree_lock);
365 memset(&ne, 0, sizeof(struct f2fs_nat_entry));
367 /* Check current segment summary */
368 mutex_lock(&curseg->curseg_mutex);
369 i = lookup_journal_in_cursum(sum, NAT_JOURNAL, nid, 0);
371 ne = nat_in_journal(sum, i);
372 node_info_from_raw_nat(ni, &ne);
374 mutex_unlock(&curseg->curseg_mutex);
378 /* Fill node_info from nat page */
379 page = get_current_nat_page(sbi, start_nid);
380 nat_blk = (struct f2fs_nat_block *)page_address(page);
381 ne = nat_blk->entries[nid - start_nid];
382 node_info_from_raw_nat(ni, &ne);
383 f2fs_put_page(page, 1);
385 /* cache nat entry */
386 cache_nat_entry(NM_I(sbi), nid, &ne);
390 * The maximum depth is four.
391 * Offset[0] will have raw inode offset.
393 static int get_node_path(struct f2fs_inode_info *fi, long block,
394 int offset[4], unsigned int noffset[4])
396 const long direct_index = ADDRS_PER_INODE(fi);
397 const long direct_blks = ADDRS_PER_BLOCK;
398 const long dptrs_per_blk = NIDS_PER_BLOCK;
399 const long indirect_blks = ADDRS_PER_BLOCK * NIDS_PER_BLOCK;
400 const long dindirect_blks = indirect_blks * NIDS_PER_BLOCK;
406 if (block < direct_index) {
410 block -= direct_index;
411 if (block < direct_blks) {
412 offset[n++] = NODE_DIR1_BLOCK;
418 block -= direct_blks;
419 if (block < direct_blks) {
420 offset[n++] = NODE_DIR2_BLOCK;
426 block -= direct_blks;
427 if (block < indirect_blks) {
428 offset[n++] = NODE_IND1_BLOCK;
430 offset[n++] = block / direct_blks;
431 noffset[n] = 4 + offset[n - 1];
432 offset[n] = block % direct_blks;
436 block -= indirect_blks;
437 if (block < indirect_blks) {
438 offset[n++] = NODE_IND2_BLOCK;
439 noffset[n] = 4 + dptrs_per_blk;
440 offset[n++] = block / direct_blks;
441 noffset[n] = 5 + dptrs_per_blk + offset[n - 1];
442 offset[n] = block % direct_blks;
446 block -= indirect_blks;
447 if (block < dindirect_blks) {
448 offset[n++] = NODE_DIND_BLOCK;
449 noffset[n] = 5 + (dptrs_per_blk * 2);
450 offset[n++] = block / indirect_blks;
451 noffset[n] = 6 + (dptrs_per_blk * 2) +
452 offset[n - 1] * (dptrs_per_blk + 1);
453 offset[n++] = (block / direct_blks) % dptrs_per_blk;
454 noffset[n] = 7 + (dptrs_per_blk * 2) +
455 offset[n - 2] * (dptrs_per_blk + 1) +
457 offset[n] = block % direct_blks;
468 * Caller should call f2fs_put_dnode(dn).
469 * Also, it should grab and release a rwsem by calling f2fs_lock_op() and
470 * f2fs_unlock_op() only if ro is not set RDONLY_NODE.
471 * In the case of RDONLY_NODE, we don't need to care about mutex.
473 int get_dnode_of_data(struct dnode_of_data *dn, pgoff_t index, int mode)
475 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
476 struct page *npage[4];
479 unsigned int noffset[4];
484 level = get_node_path(F2FS_I(dn->inode), index, offset, noffset);
486 nids[0] = dn->inode->i_ino;
487 npage[0] = dn->inode_page;
490 npage[0] = get_node_page(sbi, nids[0]);
491 if (IS_ERR(npage[0]))
492 return PTR_ERR(npage[0]);
496 nids[1] = get_nid(parent, offset[0], true);
497 dn->inode_page = npage[0];
498 dn->inode_page_locked = true;
500 /* get indirect or direct nodes */
501 for (i = 1; i <= level; i++) {
504 if (!nids[i] && mode == ALLOC_NODE) {
506 if (!alloc_nid(sbi, &(nids[i]))) {
512 npage[i] = new_node_page(dn, noffset[i], NULL);
513 if (IS_ERR(npage[i])) {
514 alloc_nid_failed(sbi, nids[i]);
515 err = PTR_ERR(npage[i]);
519 set_nid(parent, offset[i - 1], nids[i], i == 1);
520 alloc_nid_done(sbi, nids[i]);
522 } else if (mode == LOOKUP_NODE_RA && i == level && level > 1) {
523 npage[i] = get_node_page_ra(parent, offset[i - 1]);
524 if (IS_ERR(npage[i])) {
525 err = PTR_ERR(npage[i]);
531 dn->inode_page_locked = false;
534 f2fs_put_page(parent, 1);
538 npage[i] = get_node_page(sbi, nids[i]);
539 if (IS_ERR(npage[i])) {
540 err = PTR_ERR(npage[i]);
541 f2fs_put_page(npage[0], 0);
547 nids[i + 1] = get_nid(parent, offset[i], false);
550 dn->nid = nids[level];
551 dn->ofs_in_node = offset[level];
552 dn->node_page = npage[level];
553 dn->data_blkaddr = datablock_addr(dn->node_page, dn->ofs_in_node);
557 f2fs_put_page(parent, 1);
559 f2fs_put_page(npage[0], 0);
561 dn->inode_page = NULL;
562 dn->node_page = NULL;
566 static void truncate_node(struct dnode_of_data *dn)
568 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
571 get_node_info(sbi, dn->nid, &ni);
572 if (dn->inode->i_blocks == 0) {
573 f2fs_bug_on(sbi, ni.blk_addr != NULL_ADDR);
576 f2fs_bug_on(sbi, ni.blk_addr == NULL_ADDR);
578 /* Deallocate node address */
579 invalidate_blocks(sbi, ni.blk_addr);
580 dec_valid_node_count(sbi, dn->inode);
581 set_node_addr(sbi, &ni, NULL_ADDR, false);
583 if (dn->nid == dn->inode->i_ino) {
584 remove_orphan_inode(sbi, dn->nid);
585 dec_valid_inode_count(sbi);
590 clear_node_page_dirty(dn->node_page);
591 set_sbi_flag(sbi, SBI_IS_DIRTY);
593 f2fs_put_page(dn->node_page, 1);
595 invalidate_mapping_pages(NODE_MAPPING(sbi),
596 dn->node_page->index, dn->node_page->index);
598 dn->node_page = NULL;
599 trace_f2fs_truncate_node(dn->inode, dn->nid, ni.blk_addr);
602 static int truncate_dnode(struct dnode_of_data *dn)
609 /* get direct node */
610 page = get_node_page(F2FS_I_SB(dn->inode), dn->nid);
611 if (IS_ERR(page) && PTR_ERR(page) == -ENOENT)
613 else if (IS_ERR(page))
614 return PTR_ERR(page);
616 /* Make dnode_of_data for parameter */
617 dn->node_page = page;
619 truncate_data_blocks(dn);
624 static int truncate_nodes(struct dnode_of_data *dn, unsigned int nofs,
627 struct dnode_of_data rdn = *dn;
629 struct f2fs_node *rn;
631 unsigned int child_nofs;
636 return NIDS_PER_BLOCK + 1;
638 trace_f2fs_truncate_nodes_enter(dn->inode, dn->nid, dn->data_blkaddr);
640 page = get_node_page(F2FS_I_SB(dn->inode), dn->nid);
642 trace_f2fs_truncate_nodes_exit(dn->inode, PTR_ERR(page));
643 return PTR_ERR(page);
646 rn = F2FS_NODE(page);
648 for (i = ofs; i < NIDS_PER_BLOCK; i++, freed++) {
649 child_nid = le32_to_cpu(rn->in.nid[i]);
653 ret = truncate_dnode(&rdn);
656 set_nid(page, i, 0, false);
659 child_nofs = nofs + ofs * (NIDS_PER_BLOCK + 1) + 1;
660 for (i = ofs; i < NIDS_PER_BLOCK; i++) {
661 child_nid = le32_to_cpu(rn->in.nid[i]);
662 if (child_nid == 0) {
663 child_nofs += NIDS_PER_BLOCK + 1;
667 ret = truncate_nodes(&rdn, child_nofs, 0, depth - 1);
668 if (ret == (NIDS_PER_BLOCK + 1)) {
669 set_nid(page, i, 0, false);
671 } else if (ret < 0 && ret != -ENOENT) {
679 /* remove current indirect node */
680 dn->node_page = page;
684 f2fs_put_page(page, 1);
686 trace_f2fs_truncate_nodes_exit(dn->inode, freed);
690 f2fs_put_page(page, 1);
691 trace_f2fs_truncate_nodes_exit(dn->inode, ret);
695 static int truncate_partial_nodes(struct dnode_of_data *dn,
696 struct f2fs_inode *ri, int *offset, int depth)
698 struct page *pages[2];
705 nid[0] = le32_to_cpu(ri->i_nid[offset[0] - NODE_DIR1_BLOCK]);
709 /* get indirect nodes in the path */
710 for (i = 0; i < idx + 1; i++) {
711 /* reference count'll be increased */
712 pages[i] = get_node_page(F2FS_I_SB(dn->inode), nid[i]);
713 if (IS_ERR(pages[i])) {
714 err = PTR_ERR(pages[i]);
718 nid[i + 1] = get_nid(pages[i], offset[i + 1], false);
721 /* free direct nodes linked to a partial indirect node */
722 for (i = offset[idx + 1]; i < NIDS_PER_BLOCK; i++) {
723 child_nid = get_nid(pages[idx], i, false);
727 err = truncate_dnode(dn);
730 set_nid(pages[idx], i, 0, false);
733 if (offset[idx + 1] == 0) {
734 dn->node_page = pages[idx];
738 f2fs_put_page(pages[idx], 1);
744 for (i = idx; i >= 0; i--)
745 f2fs_put_page(pages[i], 1);
747 trace_f2fs_truncate_partial_nodes(dn->inode, nid, depth, err);
753 * All the block addresses of data and nodes should be nullified.
755 int truncate_inode_blocks(struct inode *inode, pgoff_t from)
757 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
758 int err = 0, cont = 1;
759 int level, offset[4], noffset[4];
760 unsigned int nofs = 0;
761 struct f2fs_inode *ri;
762 struct dnode_of_data dn;
765 trace_f2fs_truncate_inode_blocks_enter(inode, from);
767 level = get_node_path(F2FS_I(inode), from, offset, noffset);
769 page = get_node_page(sbi, inode->i_ino);
771 trace_f2fs_truncate_inode_blocks_exit(inode, PTR_ERR(page));
772 return PTR_ERR(page);
775 set_new_dnode(&dn, inode, page, NULL, 0);
778 ri = F2FS_INODE(page);
786 if (!offset[level - 1])
788 err = truncate_partial_nodes(&dn, ri, offset, level);
789 if (err < 0 && err != -ENOENT)
791 nofs += 1 + NIDS_PER_BLOCK;
794 nofs = 5 + 2 * NIDS_PER_BLOCK;
795 if (!offset[level - 1])
797 err = truncate_partial_nodes(&dn, ri, offset, level);
798 if (err < 0 && err != -ENOENT)
807 dn.nid = le32_to_cpu(ri->i_nid[offset[0] - NODE_DIR1_BLOCK]);
809 case NODE_DIR1_BLOCK:
810 case NODE_DIR2_BLOCK:
811 err = truncate_dnode(&dn);
814 case NODE_IND1_BLOCK:
815 case NODE_IND2_BLOCK:
816 err = truncate_nodes(&dn, nofs, offset[1], 2);
819 case NODE_DIND_BLOCK:
820 err = truncate_nodes(&dn, nofs, offset[1], 3);
827 if (err < 0 && err != -ENOENT)
829 if (offset[1] == 0 &&
830 ri->i_nid[offset[0] - NODE_DIR1_BLOCK]) {
832 if (unlikely(page->mapping != NODE_MAPPING(sbi))) {
833 f2fs_put_page(page, 1);
836 f2fs_wait_on_page_writeback(page, NODE);
837 ri->i_nid[offset[0] - NODE_DIR1_BLOCK] = 0;
838 set_page_dirty(page);
846 f2fs_put_page(page, 0);
847 trace_f2fs_truncate_inode_blocks_exit(inode, err);
848 return err > 0 ? 0 : err;
851 int truncate_xattr_node(struct inode *inode, struct page *page)
853 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
854 nid_t nid = F2FS_I(inode)->i_xattr_nid;
855 struct dnode_of_data dn;
861 npage = get_node_page(sbi, nid);
863 return PTR_ERR(npage);
865 F2FS_I(inode)->i_xattr_nid = 0;
867 /* need to do checkpoint during fsync */
868 F2FS_I(inode)->xattr_ver = cur_cp_version(F2FS_CKPT(sbi));
870 set_new_dnode(&dn, inode, page, npage, nid);
873 dn.inode_page_locked = true;
879 * Caller should grab and release a rwsem by calling f2fs_lock_op() and
882 void remove_inode_page(struct inode *inode)
884 struct dnode_of_data dn;
886 set_new_dnode(&dn, inode, NULL, NULL, inode->i_ino);
887 if (get_dnode_of_data(&dn, 0, LOOKUP_NODE))
890 if (truncate_xattr_node(inode, dn.inode_page)) {
895 /* remove potential inline_data blocks */
896 if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
897 S_ISLNK(inode->i_mode))
898 truncate_data_blocks_range(&dn, 1);
900 /* 0 is possible, after f2fs_new_inode() has failed */
901 f2fs_bug_on(F2FS_I_SB(inode),
902 inode->i_blocks != 0 && inode->i_blocks != 1);
904 /* will put inode & node pages */
908 struct page *new_inode_page(struct inode *inode)
910 struct dnode_of_data dn;
912 /* allocate inode page for new inode */
913 set_new_dnode(&dn, inode, NULL, NULL, inode->i_ino);
915 /* caller should f2fs_put_page(page, 1); */
916 return new_node_page(&dn, 0, NULL);
919 struct page *new_node_page(struct dnode_of_data *dn,
920 unsigned int ofs, struct page *ipage)
922 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
923 struct node_info old_ni, new_ni;
927 if (unlikely(is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC)))
928 return ERR_PTR(-EPERM);
930 page = grab_cache_page(NODE_MAPPING(sbi), dn->nid);
932 return ERR_PTR(-ENOMEM);
934 if (unlikely(!inc_valid_node_count(sbi, dn->inode))) {
939 get_node_info(sbi, dn->nid, &old_ni);
941 /* Reinitialize old_ni with new node page */
942 f2fs_bug_on(sbi, old_ni.blk_addr != NULL_ADDR);
944 new_ni.ino = dn->inode->i_ino;
945 set_node_addr(sbi, &new_ni, NEW_ADDR, false);
947 f2fs_wait_on_page_writeback(page, NODE);
948 fill_node_footer(page, dn->nid, dn->inode->i_ino, ofs, true);
949 set_cold_node(dn->inode, page);
950 SetPageUptodate(page);
951 set_page_dirty(page);
953 if (f2fs_has_xattr_block(ofs))
954 F2FS_I(dn->inode)->i_xattr_nid = dn->nid;
956 dn->node_page = page;
958 update_inode(dn->inode, ipage);
962 inc_valid_inode_count(sbi);
967 clear_node_page_dirty(page);
968 f2fs_put_page(page, 1);
973 * Caller should do after getting the following values.
974 * 0: f2fs_put_page(page, 0)
975 * LOCKED_PAGE: f2fs_put_page(page, 1)
978 static int read_node_page(struct page *page, int rw)
980 struct f2fs_sb_info *sbi = F2FS_P_SB(page);
982 struct f2fs_io_info fio = {
987 get_node_info(sbi, page->index, &ni);
989 if (unlikely(ni.blk_addr == NULL_ADDR)) {
990 f2fs_put_page(page, 1);
994 if (PageUptodate(page))
997 fio.blk_addr = ni.blk_addr;
998 return f2fs_submit_page_bio(sbi, page, &fio);
1002 * Readahead a node page
1004 void ra_node_page(struct f2fs_sb_info *sbi, nid_t nid)
1009 apage = find_get_page(NODE_MAPPING(sbi), nid);
1010 if (apage && PageUptodate(apage)) {
1011 f2fs_put_page(apage, 0);
1014 f2fs_put_page(apage, 0);
1016 apage = grab_cache_page(NODE_MAPPING(sbi), nid);
1020 err = read_node_page(apage, READA);
1022 f2fs_put_page(apage, 0);
1023 else if (err == LOCKED_PAGE)
1024 f2fs_put_page(apage, 1);
1027 struct page *get_node_page(struct f2fs_sb_info *sbi, pgoff_t nid)
1032 page = grab_cache_page(NODE_MAPPING(sbi), nid);
1034 return ERR_PTR(-ENOMEM);
1036 err = read_node_page(page, READ_SYNC);
1038 return ERR_PTR(err);
1039 else if (err == LOCKED_PAGE)
1043 if (unlikely(!PageUptodate(page) || nid != nid_of_node(page))) {
1044 f2fs_put_page(page, 1);
1045 return ERR_PTR(-EIO);
1047 if (unlikely(page->mapping != NODE_MAPPING(sbi))) {
1048 f2fs_put_page(page, 1);
1056 * Return a locked page for the desired node page.
1057 * And, readahead MAX_RA_NODE number of node pages.
1059 struct page *get_node_page_ra(struct page *parent, int start)
1061 struct f2fs_sb_info *sbi = F2FS_P_SB(parent);
1062 struct blk_plug plug;
1067 /* First, try getting the desired direct node. */
1068 nid = get_nid(parent, start, false);
1070 return ERR_PTR(-ENOENT);
1072 page = grab_cache_page(NODE_MAPPING(sbi), nid);
1074 return ERR_PTR(-ENOMEM);
1076 err = read_node_page(page, READ_SYNC);
1078 return ERR_PTR(err);
1079 else if (err == LOCKED_PAGE)
1082 blk_start_plug(&plug);
1084 /* Then, try readahead for siblings of the desired node */
1085 end = start + MAX_RA_NODE;
1086 end = min(end, NIDS_PER_BLOCK);
1087 for (i = start + 1; i < end; i++) {
1088 nid = get_nid(parent, i, false);
1091 ra_node_page(sbi, nid);
1094 blk_finish_plug(&plug);
1097 if (unlikely(page->mapping != NODE_MAPPING(sbi))) {
1098 f2fs_put_page(page, 1);
1102 if (unlikely(!PageUptodate(page))) {
1103 f2fs_put_page(page, 1);
1104 return ERR_PTR(-EIO);
1109 void sync_inode_page(struct dnode_of_data *dn)
1111 if (IS_INODE(dn->node_page) || dn->inode_page == dn->node_page) {
1112 update_inode(dn->inode, dn->node_page);
1113 } else if (dn->inode_page) {
1114 if (!dn->inode_page_locked)
1115 lock_page(dn->inode_page);
1116 update_inode(dn->inode, dn->inode_page);
1117 if (!dn->inode_page_locked)
1118 unlock_page(dn->inode_page);
1120 update_inode_page(dn->inode);
1124 int sync_node_pages(struct f2fs_sb_info *sbi, nid_t ino,
1125 struct writeback_control *wbc)
1128 struct pagevec pvec;
1129 int step = ino ? 2 : 0;
1130 int nwritten = 0, wrote = 0;
1132 pagevec_init(&pvec, 0);
1138 while (index <= end) {
1140 nr_pages = pagevec_lookup_tag(&pvec, NODE_MAPPING(sbi), &index,
1141 PAGECACHE_TAG_DIRTY,
1142 min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1);
1146 for (i = 0; i < nr_pages; i++) {
1147 struct page *page = pvec.pages[i];
1150 * flushing sequence with step:
1155 if (step == 0 && IS_DNODE(page))
1157 if (step == 1 && (!IS_DNODE(page) ||
1158 is_cold_node(page)))
1160 if (step == 2 && (!IS_DNODE(page) ||
1161 !is_cold_node(page)))
1166 * we should not skip writing node pages.
1168 if (ino && ino_of_node(page) == ino)
1170 else if (!trylock_page(page))
1173 if (unlikely(page->mapping != NODE_MAPPING(sbi))) {
1178 if (ino && ino_of_node(page) != ino)
1179 goto continue_unlock;
1181 if (!PageDirty(page)) {
1182 /* someone wrote it for us */
1183 goto continue_unlock;
1186 if (!clear_page_dirty_for_io(page))
1187 goto continue_unlock;
1189 /* called by fsync() */
1190 if (ino && IS_DNODE(page)) {
1191 set_fsync_mark(page, 1);
1192 if (IS_INODE(page)) {
1193 if (!is_checkpointed_node(sbi, ino) &&
1194 !has_fsynced_inode(sbi, ino))
1195 set_dentry_mark(page, 1);
1197 set_dentry_mark(page, 0);
1201 set_fsync_mark(page, 0);
1202 set_dentry_mark(page, 0);
1205 if (NODE_MAPPING(sbi)->a_ops->writepage(page, wbc))
1210 if (--wbc->nr_to_write == 0)
1213 pagevec_release(&pvec);
1216 if (wbc->nr_to_write == 0) {
1228 f2fs_submit_merged_bio(sbi, NODE, WRITE);
1232 int wait_on_node_pages_writeback(struct f2fs_sb_info *sbi, nid_t ino)
1234 pgoff_t index = 0, end = LONG_MAX;
1235 struct pagevec pvec;
1236 int ret2 = 0, ret = 0;
1238 pagevec_init(&pvec, 0);
1240 while (index <= end) {
1242 nr_pages = pagevec_lookup_tag(&pvec, NODE_MAPPING(sbi), &index,
1243 PAGECACHE_TAG_WRITEBACK,
1244 min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1);
1248 for (i = 0; i < nr_pages; i++) {
1249 struct page *page = pvec.pages[i];
1251 /* until radix tree lookup accepts end_index */
1252 if (unlikely(page->index > end))
1255 if (ino && ino_of_node(page) == ino) {
1256 f2fs_wait_on_page_writeback(page, NODE);
1257 if (TestClearPageError(page))
1261 pagevec_release(&pvec);
1265 if (unlikely(test_and_clear_bit(AS_ENOSPC, &NODE_MAPPING(sbi)->flags)))
1267 if (unlikely(test_and_clear_bit(AS_EIO, &NODE_MAPPING(sbi)->flags)))
1274 static int f2fs_write_node_page(struct page *page,
1275 struct writeback_control *wbc)
1277 struct f2fs_sb_info *sbi = F2FS_P_SB(page);
1279 struct node_info ni;
1280 struct f2fs_io_info fio = {
1282 .rw = (wbc->sync_mode == WB_SYNC_ALL) ? WRITE_SYNC : WRITE,
1285 trace_f2fs_writepage(page, NODE);
1287 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
1289 if (unlikely(f2fs_cp_error(sbi)))
1292 f2fs_wait_on_page_writeback(page, NODE);
1294 /* get old block addr of this node page */
1295 nid = nid_of_node(page);
1296 f2fs_bug_on(sbi, page->index != nid);
1298 get_node_info(sbi, nid, &ni);
1300 /* This page is already truncated */
1301 if (unlikely(ni.blk_addr == NULL_ADDR)) {
1302 dec_page_count(sbi, F2FS_DIRTY_NODES);
1307 if (wbc->for_reclaim) {
1308 if (!down_read_trylock(&sbi->node_write))
1311 down_read(&sbi->node_write);
1314 set_page_writeback(page);
1315 fio.blk_addr = ni.blk_addr;
1316 write_node_page(sbi, page, nid, &fio);
1317 set_node_addr(sbi, &ni, fio.blk_addr, is_fsync_dnode(page));
1318 dec_page_count(sbi, F2FS_DIRTY_NODES);
1319 up_read(&sbi->node_write);
1322 if (wbc->for_reclaim)
1323 f2fs_submit_merged_bio(sbi, NODE, WRITE);
1328 redirty_page_for_writepage(wbc, page);
1329 return AOP_WRITEPAGE_ACTIVATE;
1332 static int f2fs_write_node_pages(struct address_space *mapping,
1333 struct writeback_control *wbc)
1335 struct f2fs_sb_info *sbi = F2FS_M_SB(mapping);
1338 trace_f2fs_writepages(mapping->host, wbc, NODE);
1340 /* balancing f2fs's metadata in background */
1341 f2fs_balance_fs_bg(sbi);
1343 /* collect a number of dirty node pages and write together */
1344 if (get_pages(sbi, F2FS_DIRTY_NODES) < nr_pages_to_skip(sbi, NODE))
1347 diff = nr_pages_to_write(sbi, NODE, wbc);
1348 wbc->sync_mode = WB_SYNC_NONE;
1349 sync_node_pages(sbi, 0, wbc);
1350 wbc->nr_to_write = max((long)0, wbc->nr_to_write - diff);
1354 wbc->pages_skipped += get_pages(sbi, F2FS_DIRTY_NODES);
1358 static int f2fs_set_node_page_dirty(struct page *page)
1360 trace_f2fs_set_page_dirty(page, NODE);
1362 SetPageUptodate(page);
1363 if (!PageDirty(page)) {
1364 __set_page_dirty_nobuffers(page);
1365 inc_page_count(F2FS_P_SB(page), F2FS_DIRTY_NODES);
1366 SetPagePrivate(page);
1367 f2fs_trace_pid(page);
1373 static void f2fs_invalidate_node_page(struct page *page, unsigned int offset,
1374 unsigned int length)
1376 struct inode *inode = page->mapping->host;
1377 if (PageDirty(page))
1378 dec_page_count(F2FS_I_SB(inode), F2FS_DIRTY_NODES);
1379 ClearPagePrivate(page);
1382 static int f2fs_release_node_page(struct page *page, gfp_t wait)
1384 /* If this is dirty page, keep PagePrivate */
1385 if (PageDirty(page))
1388 ClearPagePrivate(page);
1393 * Structure of the f2fs node operations
1395 const struct address_space_operations f2fs_node_aops = {
1396 .writepage = f2fs_write_node_page,
1397 .writepages = f2fs_write_node_pages,
1398 .set_page_dirty = f2fs_set_node_page_dirty,
1399 .invalidatepage = f2fs_invalidate_node_page,
1400 .releasepage = f2fs_release_node_page,
1403 static struct free_nid *__lookup_free_nid_list(struct f2fs_nm_info *nm_i,
1406 return radix_tree_lookup(&nm_i->free_nid_root, n);
1409 static void __del_from_free_nid_list(struct f2fs_nm_info *nm_i,
1413 radix_tree_delete(&nm_i->free_nid_root, i->nid);
1416 static int add_free_nid(struct f2fs_sb_info *sbi, nid_t nid, bool build)
1418 struct f2fs_nm_info *nm_i = NM_I(sbi);
1420 struct nat_entry *ne;
1421 bool allocated = false;
1423 if (!available_free_memory(sbi, FREE_NIDS))
1426 /* 0 nid should not be used */
1427 if (unlikely(nid == 0))
1431 /* do not add allocated nids */
1432 down_read(&nm_i->nat_tree_lock);
1433 ne = __lookup_nat_cache(nm_i, nid);
1435 (!get_nat_flag(ne, IS_CHECKPOINTED) ||
1436 nat_get_blkaddr(ne) != NULL_ADDR))
1438 up_read(&nm_i->nat_tree_lock);
1443 i = f2fs_kmem_cache_alloc(free_nid_slab, GFP_NOFS);
1447 if (radix_tree_preload(GFP_NOFS)) {
1448 kmem_cache_free(free_nid_slab, i);
1452 spin_lock(&nm_i->free_nid_list_lock);
1453 if (radix_tree_insert(&nm_i->free_nid_root, i->nid, i)) {
1454 spin_unlock(&nm_i->free_nid_list_lock);
1455 radix_tree_preload_end();
1456 kmem_cache_free(free_nid_slab, i);
1459 list_add_tail(&i->list, &nm_i->free_nid_list);
1461 spin_unlock(&nm_i->free_nid_list_lock);
1462 radix_tree_preload_end();
1466 static void remove_free_nid(struct f2fs_nm_info *nm_i, nid_t nid)
1469 bool need_free = false;
1471 spin_lock(&nm_i->free_nid_list_lock);
1472 i = __lookup_free_nid_list(nm_i, nid);
1473 if (i && i->state == NID_NEW) {
1474 __del_from_free_nid_list(nm_i, i);
1478 spin_unlock(&nm_i->free_nid_list_lock);
1481 kmem_cache_free(free_nid_slab, i);
1484 static void scan_nat_page(struct f2fs_sb_info *sbi,
1485 struct page *nat_page, nid_t start_nid)
1487 struct f2fs_nm_info *nm_i = NM_I(sbi);
1488 struct f2fs_nat_block *nat_blk = page_address(nat_page);
1492 i = start_nid % NAT_ENTRY_PER_BLOCK;
1494 for (; i < NAT_ENTRY_PER_BLOCK; i++, start_nid++) {
1496 if (unlikely(start_nid >= nm_i->max_nid))
1499 blk_addr = le32_to_cpu(nat_blk->entries[i].block_addr);
1500 f2fs_bug_on(sbi, blk_addr == NEW_ADDR);
1501 if (blk_addr == NULL_ADDR) {
1502 if (add_free_nid(sbi, start_nid, true) < 0)
1508 static void build_free_nids(struct f2fs_sb_info *sbi)
1510 struct f2fs_nm_info *nm_i = NM_I(sbi);
1511 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA);
1512 struct f2fs_summary_block *sum = curseg->sum_blk;
1514 nid_t nid = nm_i->next_scan_nid;
1516 /* Enough entries */
1517 if (nm_i->fcnt > NAT_ENTRY_PER_BLOCK)
1520 /* readahead nat pages to be scanned */
1521 ra_meta_pages(sbi, NAT_BLOCK_OFFSET(nid), FREE_NID_PAGES, META_NAT);
1524 struct page *page = get_current_nat_page(sbi, nid);
1526 scan_nat_page(sbi, page, nid);
1527 f2fs_put_page(page, 1);
1529 nid += (NAT_ENTRY_PER_BLOCK - (nid % NAT_ENTRY_PER_BLOCK));
1530 if (unlikely(nid >= nm_i->max_nid))
1533 if (i++ == FREE_NID_PAGES)
1537 /* go to the next free nat pages to find free nids abundantly */
1538 nm_i->next_scan_nid = nid;
1540 /* find free nids from current sum_pages */
1541 mutex_lock(&curseg->curseg_mutex);
1542 for (i = 0; i < nats_in_cursum(sum); i++) {
1543 block_t addr = le32_to_cpu(nat_in_journal(sum, i).block_addr);
1544 nid = le32_to_cpu(nid_in_journal(sum, i));
1545 if (addr == NULL_ADDR)
1546 add_free_nid(sbi, nid, true);
1548 remove_free_nid(nm_i, nid);
1550 mutex_unlock(&curseg->curseg_mutex);
1554 * If this function returns success, caller can obtain a new nid
1555 * from second parameter of this function.
1556 * The returned nid could be used ino as well as nid when inode is created.
1558 bool alloc_nid(struct f2fs_sb_info *sbi, nid_t *nid)
1560 struct f2fs_nm_info *nm_i = NM_I(sbi);
1561 struct free_nid *i = NULL;
1563 if (unlikely(sbi->total_valid_node_count + 1 > nm_i->available_nids))
1566 spin_lock(&nm_i->free_nid_list_lock);
1568 /* We should not use stale free nids created by build_free_nids */
1569 if (nm_i->fcnt && !on_build_free_nids(nm_i)) {
1570 f2fs_bug_on(sbi, list_empty(&nm_i->free_nid_list));
1571 list_for_each_entry(i, &nm_i->free_nid_list, list)
1572 if (i->state == NID_NEW)
1575 f2fs_bug_on(sbi, i->state != NID_NEW);
1577 i->state = NID_ALLOC;
1579 spin_unlock(&nm_i->free_nid_list_lock);
1582 spin_unlock(&nm_i->free_nid_list_lock);
1584 /* Let's scan nat pages and its caches to get free nids */
1585 mutex_lock(&nm_i->build_lock);
1586 build_free_nids(sbi);
1587 mutex_unlock(&nm_i->build_lock);
1592 * alloc_nid() should be called prior to this function.
1594 void alloc_nid_done(struct f2fs_sb_info *sbi, nid_t nid)
1596 struct f2fs_nm_info *nm_i = NM_I(sbi);
1599 spin_lock(&nm_i->free_nid_list_lock);
1600 i = __lookup_free_nid_list(nm_i, nid);
1601 f2fs_bug_on(sbi, !i || i->state != NID_ALLOC);
1602 __del_from_free_nid_list(nm_i, i);
1603 spin_unlock(&nm_i->free_nid_list_lock);
1605 kmem_cache_free(free_nid_slab, i);
1609 * alloc_nid() should be called prior to this function.
1611 void alloc_nid_failed(struct f2fs_sb_info *sbi, nid_t nid)
1613 struct f2fs_nm_info *nm_i = NM_I(sbi);
1615 bool need_free = false;
1620 spin_lock(&nm_i->free_nid_list_lock);
1621 i = __lookup_free_nid_list(nm_i, nid);
1622 f2fs_bug_on(sbi, !i || i->state != NID_ALLOC);
1623 if (!available_free_memory(sbi, FREE_NIDS)) {
1624 __del_from_free_nid_list(nm_i, i);
1630 spin_unlock(&nm_i->free_nid_list_lock);
1633 kmem_cache_free(free_nid_slab, i);
1636 void recover_inline_xattr(struct inode *inode, struct page *page)
1638 void *src_addr, *dst_addr;
1641 struct f2fs_inode *ri;
1643 ipage = get_node_page(F2FS_I_SB(inode), inode->i_ino);
1644 f2fs_bug_on(F2FS_I_SB(inode), IS_ERR(ipage));
1646 ri = F2FS_INODE(page);
1647 if (!(ri->i_inline & F2FS_INLINE_XATTR)) {
1648 clear_inode_flag(F2FS_I(inode), FI_INLINE_XATTR);
1652 dst_addr = inline_xattr_addr(ipage);
1653 src_addr = inline_xattr_addr(page);
1654 inline_size = inline_xattr_size(inode);
1656 f2fs_wait_on_page_writeback(ipage, NODE);
1657 memcpy(dst_addr, src_addr, inline_size);
1659 update_inode(inode, ipage);
1660 f2fs_put_page(ipage, 1);
1663 void recover_xattr_data(struct inode *inode, struct page *page, block_t blkaddr)
1665 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1666 nid_t prev_xnid = F2FS_I(inode)->i_xattr_nid;
1667 nid_t new_xnid = nid_of_node(page);
1668 struct node_info ni;
1670 /* 1: invalidate the previous xattr nid */
1674 /* Deallocate node address */
1675 get_node_info(sbi, prev_xnid, &ni);
1676 f2fs_bug_on(sbi, ni.blk_addr == NULL_ADDR);
1677 invalidate_blocks(sbi, ni.blk_addr);
1678 dec_valid_node_count(sbi, inode);
1679 set_node_addr(sbi, &ni, NULL_ADDR, false);
1682 /* 2: allocate new xattr nid */
1683 if (unlikely(!inc_valid_node_count(sbi, inode)))
1684 f2fs_bug_on(sbi, 1);
1686 remove_free_nid(NM_I(sbi), new_xnid);
1687 get_node_info(sbi, new_xnid, &ni);
1688 ni.ino = inode->i_ino;
1689 set_node_addr(sbi, &ni, NEW_ADDR, false);
1690 F2FS_I(inode)->i_xattr_nid = new_xnid;
1692 /* 3: update xattr blkaddr */
1693 refresh_sit_entry(sbi, NEW_ADDR, blkaddr);
1694 set_node_addr(sbi, &ni, blkaddr, false);
1696 update_inode_page(inode);
1699 int recover_inode_page(struct f2fs_sb_info *sbi, struct page *page)
1701 struct f2fs_inode *src, *dst;
1702 nid_t ino = ino_of_node(page);
1703 struct node_info old_ni, new_ni;
1706 get_node_info(sbi, ino, &old_ni);
1708 if (unlikely(old_ni.blk_addr != NULL_ADDR))
1711 ipage = grab_cache_page(NODE_MAPPING(sbi), ino);
1715 /* Should not use this inode from free nid list */
1716 remove_free_nid(NM_I(sbi), ino);
1718 SetPageUptodate(ipage);
1719 fill_node_footer(ipage, ino, ino, 0, true);
1721 src = F2FS_INODE(page);
1722 dst = F2FS_INODE(ipage);
1724 memcpy(dst, src, (unsigned long)&src->i_ext - (unsigned long)src);
1726 dst->i_blocks = cpu_to_le64(1);
1727 dst->i_links = cpu_to_le32(1);
1728 dst->i_xattr_nid = 0;
1729 dst->i_inline = src->i_inline & F2FS_INLINE_XATTR;
1734 if (unlikely(!inc_valid_node_count(sbi, NULL)))
1736 set_node_addr(sbi, &new_ni, NEW_ADDR, false);
1737 inc_valid_inode_count(sbi);
1738 set_page_dirty(ipage);
1739 f2fs_put_page(ipage, 1);
1743 int restore_node_summary(struct f2fs_sb_info *sbi,
1744 unsigned int segno, struct f2fs_summary_block *sum)
1746 struct f2fs_node *rn;
1747 struct f2fs_summary *sum_entry;
1749 int bio_blocks = MAX_BIO_BLOCKS(sbi);
1750 int i, idx, last_offset, nrpages;
1752 /* scan the node segment */
1753 last_offset = sbi->blocks_per_seg;
1754 addr = START_BLOCK(sbi, segno);
1755 sum_entry = &sum->entries[0];
1757 for (i = 0; i < last_offset; i += nrpages, addr += nrpages) {
1758 nrpages = min(last_offset - i, bio_blocks);
1760 /* readahead node pages */
1761 ra_meta_pages(sbi, addr, nrpages, META_POR);
1763 for (idx = addr; idx < addr + nrpages; idx++) {
1764 struct page *page = get_meta_page(sbi, idx);
1766 rn = F2FS_NODE(page);
1767 sum_entry->nid = rn->footer.nid;
1768 sum_entry->version = 0;
1769 sum_entry->ofs_in_node = 0;
1771 f2fs_put_page(page, 1);
1774 invalidate_mapping_pages(META_MAPPING(sbi), addr,
1780 static void remove_nats_in_journal(struct f2fs_sb_info *sbi)
1782 struct f2fs_nm_info *nm_i = NM_I(sbi);
1783 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA);
1784 struct f2fs_summary_block *sum = curseg->sum_blk;
1787 mutex_lock(&curseg->curseg_mutex);
1788 for (i = 0; i < nats_in_cursum(sum); i++) {
1789 struct nat_entry *ne;
1790 struct f2fs_nat_entry raw_ne;
1791 nid_t nid = le32_to_cpu(nid_in_journal(sum, i));
1793 raw_ne = nat_in_journal(sum, i);
1795 down_write(&nm_i->nat_tree_lock);
1796 ne = __lookup_nat_cache(nm_i, nid);
1798 ne = grab_nat_entry(nm_i, nid);
1799 node_info_from_raw_nat(&ne->ni, &raw_ne);
1801 __set_nat_cache_dirty(nm_i, ne);
1802 up_write(&nm_i->nat_tree_lock);
1804 update_nats_in_cursum(sum, -i);
1805 mutex_unlock(&curseg->curseg_mutex);
1808 static void __adjust_nat_entry_set(struct nat_entry_set *nes,
1809 struct list_head *head, int max)
1811 struct nat_entry_set *cur;
1813 if (nes->entry_cnt >= max)
1816 list_for_each_entry(cur, head, set_list) {
1817 if (cur->entry_cnt >= nes->entry_cnt) {
1818 list_add(&nes->set_list, cur->set_list.prev);
1823 list_add_tail(&nes->set_list, head);
1826 static void __flush_nat_entry_set(struct f2fs_sb_info *sbi,
1827 struct nat_entry_set *set)
1829 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA);
1830 struct f2fs_summary_block *sum = curseg->sum_blk;
1831 nid_t start_nid = set->set * NAT_ENTRY_PER_BLOCK;
1832 bool to_journal = true;
1833 struct f2fs_nat_block *nat_blk;
1834 struct nat_entry *ne, *cur;
1835 struct page *page = NULL;
1838 * there are two steps to flush nat entries:
1839 * #1, flush nat entries to journal in current hot data summary block.
1840 * #2, flush nat entries to nat page.
1842 if (!__has_cursum_space(sum, set->entry_cnt, NAT_JOURNAL))
1846 mutex_lock(&curseg->curseg_mutex);
1848 page = get_next_nat_page(sbi, start_nid);
1849 nat_blk = page_address(page);
1850 f2fs_bug_on(sbi, !nat_blk);
1853 /* flush dirty nats in nat entry set */
1854 list_for_each_entry_safe(ne, cur, &set->entry_list, list) {
1855 struct f2fs_nat_entry *raw_ne;
1856 nid_t nid = nat_get_nid(ne);
1859 if (nat_get_blkaddr(ne) == NEW_ADDR)
1863 offset = lookup_journal_in_cursum(sum,
1864 NAT_JOURNAL, nid, 1);
1865 f2fs_bug_on(sbi, offset < 0);
1866 raw_ne = &nat_in_journal(sum, offset);
1867 nid_in_journal(sum, offset) = cpu_to_le32(nid);
1869 raw_ne = &nat_blk->entries[nid - start_nid];
1871 raw_nat_from_node_info(raw_ne, &ne->ni);
1873 down_write(&NM_I(sbi)->nat_tree_lock);
1875 __clear_nat_cache_dirty(NM_I(sbi), ne);
1876 up_write(&NM_I(sbi)->nat_tree_lock);
1878 if (nat_get_blkaddr(ne) == NULL_ADDR)
1879 add_free_nid(sbi, nid, false);
1883 mutex_unlock(&curseg->curseg_mutex);
1885 f2fs_put_page(page, 1);
1887 f2fs_bug_on(sbi, set->entry_cnt);
1889 radix_tree_delete(&NM_I(sbi)->nat_set_root, set->set);
1890 kmem_cache_free(nat_entry_set_slab, set);
1894 * This function is called during the checkpointing process.
1896 void flush_nat_entries(struct f2fs_sb_info *sbi)
1898 struct f2fs_nm_info *nm_i = NM_I(sbi);
1899 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA);
1900 struct f2fs_summary_block *sum = curseg->sum_blk;
1901 struct nat_entry_set *setvec[SETVEC_SIZE];
1902 struct nat_entry_set *set, *tmp;
1907 if (!nm_i->dirty_nat_cnt)
1910 * if there are no enough space in journal to store dirty nat
1911 * entries, remove all entries from journal and merge them
1912 * into nat entry set.
1914 if (!__has_cursum_space(sum, nm_i->dirty_nat_cnt, NAT_JOURNAL))
1915 remove_nats_in_journal(sbi);
1917 while ((found = __gang_lookup_nat_set(nm_i,
1918 set_idx, SETVEC_SIZE, setvec))) {
1920 set_idx = setvec[found - 1]->set + 1;
1921 for (idx = 0; idx < found; idx++)
1922 __adjust_nat_entry_set(setvec[idx], &sets,
1923 MAX_NAT_JENTRIES(sum));
1926 /* flush dirty nats in nat entry set */
1927 list_for_each_entry_safe(set, tmp, &sets, set_list)
1928 __flush_nat_entry_set(sbi, set);
1930 f2fs_bug_on(sbi, nm_i->dirty_nat_cnt);
1933 static int init_node_manager(struct f2fs_sb_info *sbi)
1935 struct f2fs_super_block *sb_raw = F2FS_RAW_SUPER(sbi);
1936 struct f2fs_nm_info *nm_i = NM_I(sbi);
1937 unsigned char *version_bitmap;
1938 unsigned int nat_segs, nat_blocks;
1940 nm_i->nat_blkaddr = le32_to_cpu(sb_raw->nat_blkaddr);
1942 /* segment_count_nat includes pair segment so divide to 2. */
1943 nat_segs = le32_to_cpu(sb_raw->segment_count_nat) >> 1;
1944 nat_blocks = nat_segs << le32_to_cpu(sb_raw->log_blocks_per_seg);
1946 nm_i->max_nid = NAT_ENTRY_PER_BLOCK * nat_blocks;
1948 /* not used nids: 0, node, meta, (and root counted as valid node) */
1949 nm_i->available_nids = nm_i->max_nid - F2FS_RESERVED_NODE_NUM;
1952 nm_i->ram_thresh = DEF_RAM_THRESHOLD;
1954 INIT_RADIX_TREE(&nm_i->free_nid_root, GFP_ATOMIC);
1955 INIT_LIST_HEAD(&nm_i->free_nid_list);
1956 INIT_RADIX_TREE(&nm_i->nat_root, GFP_NOIO);
1957 INIT_RADIX_TREE(&nm_i->nat_set_root, GFP_NOIO);
1958 INIT_LIST_HEAD(&nm_i->nat_entries);
1960 mutex_init(&nm_i->build_lock);
1961 spin_lock_init(&nm_i->free_nid_list_lock);
1962 init_rwsem(&nm_i->nat_tree_lock);
1964 nm_i->next_scan_nid = le32_to_cpu(sbi->ckpt->next_free_nid);
1965 nm_i->bitmap_size = __bitmap_size(sbi, NAT_BITMAP);
1966 version_bitmap = __bitmap_ptr(sbi, NAT_BITMAP);
1967 if (!version_bitmap)
1970 nm_i->nat_bitmap = kmemdup(version_bitmap, nm_i->bitmap_size,
1972 if (!nm_i->nat_bitmap)
1977 int build_node_manager(struct f2fs_sb_info *sbi)
1981 sbi->nm_info = kzalloc(sizeof(struct f2fs_nm_info), GFP_KERNEL);
1985 err = init_node_manager(sbi);
1989 build_free_nids(sbi);
1993 void destroy_node_manager(struct f2fs_sb_info *sbi)
1995 struct f2fs_nm_info *nm_i = NM_I(sbi);
1996 struct free_nid *i, *next_i;
1997 struct nat_entry *natvec[NATVEC_SIZE];
1998 struct nat_entry_set *setvec[SETVEC_SIZE];
2005 /* destroy free nid list */
2006 spin_lock(&nm_i->free_nid_list_lock);
2007 list_for_each_entry_safe(i, next_i, &nm_i->free_nid_list, list) {
2008 f2fs_bug_on(sbi, i->state == NID_ALLOC);
2009 __del_from_free_nid_list(nm_i, i);
2011 spin_unlock(&nm_i->free_nid_list_lock);
2012 kmem_cache_free(free_nid_slab, i);
2013 spin_lock(&nm_i->free_nid_list_lock);
2015 f2fs_bug_on(sbi, nm_i->fcnt);
2016 spin_unlock(&nm_i->free_nid_list_lock);
2018 /* destroy nat cache */
2019 down_write(&nm_i->nat_tree_lock);
2020 while ((found = __gang_lookup_nat_cache(nm_i,
2021 nid, NATVEC_SIZE, natvec))) {
2024 nid = nat_get_nid(natvec[found - 1]) + 1;
2025 for (idx = 0; idx < found; idx++)
2026 __del_from_nat_cache(nm_i, natvec[idx]);
2028 f2fs_bug_on(sbi, nm_i->nat_cnt);
2030 /* destroy nat set cache */
2032 while ((found = __gang_lookup_nat_set(nm_i,
2033 nid, SETVEC_SIZE, setvec))) {
2036 nid = setvec[found - 1]->set + 1;
2037 for (idx = 0; idx < found; idx++) {
2038 /* entry_cnt is not zero, when cp_error was occurred */
2039 f2fs_bug_on(sbi, !list_empty(&setvec[idx]->entry_list));
2040 radix_tree_delete(&nm_i->nat_set_root, setvec[idx]->set);
2041 kmem_cache_free(nat_entry_set_slab, setvec[idx]);
2044 up_write(&nm_i->nat_tree_lock);
2046 kfree(nm_i->nat_bitmap);
2047 sbi->nm_info = NULL;
2051 int __init create_node_manager_caches(void)
2053 nat_entry_slab = f2fs_kmem_cache_create("nat_entry",
2054 sizeof(struct nat_entry));
2055 if (!nat_entry_slab)
2058 free_nid_slab = f2fs_kmem_cache_create("free_nid",
2059 sizeof(struct free_nid));
2061 goto destroy_nat_entry;
2063 nat_entry_set_slab = f2fs_kmem_cache_create("nat_entry_set",
2064 sizeof(struct nat_entry_set));
2065 if (!nat_entry_set_slab)
2066 goto destroy_free_nid;
2070 kmem_cache_destroy(free_nid_slab);
2072 kmem_cache_destroy(nat_entry_slab);
2077 void destroy_node_manager_caches(void)
2079 kmem_cache_destroy(nat_entry_set_slab);
2080 kmem_cache_destroy(free_nid_slab);
2081 kmem_cache_destroy(nat_entry_slab);