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;
45 * give 25%, 25%, 50%, 50%, 50% memory for each components respectively
47 if (type == FREE_NIDS) {
48 mem_size = (nm_i->fcnt * sizeof(struct free_nid)) >>
50 res = mem_size < ((avail_ram * nm_i->ram_thresh / 100) >> 2);
51 } else if (type == NAT_ENTRIES) {
52 mem_size = (nm_i->nat_cnt * sizeof(struct nat_entry)) >>
54 res = mem_size < ((avail_ram * nm_i->ram_thresh / 100) >> 2);
55 } else if (type == DIRTY_DENTS) {
56 if (sbi->sb->s_bdi->wb.dirty_exceeded)
58 mem_size = get_pages(sbi, F2FS_DIRTY_DENTS);
59 res = mem_size < ((avail_ram * nm_i->ram_thresh / 100) >> 1);
60 } else if (type == INO_ENTRIES) {
63 for (i = 0; i <= UPDATE_INO; i++)
64 mem_size += (sbi->im[i].ino_num *
65 sizeof(struct ino_entry)) >> PAGE_CACHE_SHIFT;
66 res = mem_size < ((avail_ram * nm_i->ram_thresh / 100) >> 1);
67 } else if (type == EXTENT_CACHE) {
68 mem_size = (atomic_read(&sbi->total_ext_tree) *
69 sizeof(struct extent_tree) +
70 atomic_read(&sbi->total_ext_node) *
71 sizeof(struct extent_node)) >> PAGE_CACHE_SHIFT;
72 res = mem_size < ((avail_ram * nm_i->ram_thresh / 100) >> 1);
74 if (!sbi->sb->s_bdi->wb.dirty_exceeded)
80 static void clear_node_page_dirty(struct page *page)
82 struct address_space *mapping = page->mapping;
83 unsigned int long flags;
85 if (PageDirty(page)) {
86 spin_lock_irqsave(&mapping->tree_lock, flags);
87 radix_tree_tag_clear(&mapping->page_tree,
90 spin_unlock_irqrestore(&mapping->tree_lock, flags);
92 clear_page_dirty_for_io(page);
93 dec_page_count(F2FS_M_SB(mapping), F2FS_DIRTY_NODES);
95 ClearPageUptodate(page);
98 static struct page *get_current_nat_page(struct f2fs_sb_info *sbi, nid_t nid)
100 pgoff_t index = current_nat_addr(sbi, nid);
101 return get_meta_page(sbi, index);
104 static struct page *get_next_nat_page(struct f2fs_sb_info *sbi, nid_t nid)
106 struct page *src_page;
107 struct page *dst_page;
112 struct f2fs_nm_info *nm_i = NM_I(sbi);
114 src_off = current_nat_addr(sbi, nid);
115 dst_off = next_nat_addr(sbi, src_off);
117 /* get current nat block page with lock */
118 src_page = get_meta_page(sbi, src_off);
119 dst_page = grab_meta_page(sbi, dst_off);
120 f2fs_bug_on(sbi, PageDirty(src_page));
122 src_addr = page_address(src_page);
123 dst_addr = page_address(dst_page);
124 memcpy(dst_addr, src_addr, PAGE_CACHE_SIZE);
125 set_page_dirty(dst_page);
126 f2fs_put_page(src_page, 1);
128 set_to_next_nat(nm_i, nid);
133 static struct nat_entry *__lookup_nat_cache(struct f2fs_nm_info *nm_i, nid_t n)
135 return radix_tree_lookup(&nm_i->nat_root, n);
138 static unsigned int __gang_lookup_nat_cache(struct f2fs_nm_info *nm_i,
139 nid_t start, unsigned int nr, struct nat_entry **ep)
141 return radix_tree_gang_lookup(&nm_i->nat_root, (void **)ep, start, nr);
144 static void __del_from_nat_cache(struct f2fs_nm_info *nm_i, struct nat_entry *e)
147 radix_tree_delete(&nm_i->nat_root, nat_get_nid(e));
149 kmem_cache_free(nat_entry_slab, e);
152 static void __set_nat_cache_dirty(struct f2fs_nm_info *nm_i,
153 struct nat_entry *ne)
155 nid_t set = NAT_BLOCK_OFFSET(ne->ni.nid);
156 struct nat_entry_set *head;
158 if (get_nat_flag(ne, IS_DIRTY))
161 head = radix_tree_lookup(&nm_i->nat_set_root, set);
163 head = f2fs_kmem_cache_alloc(nat_entry_set_slab, GFP_NOFS);
165 INIT_LIST_HEAD(&head->entry_list);
166 INIT_LIST_HEAD(&head->set_list);
169 f2fs_radix_tree_insert(&nm_i->nat_set_root, set, head);
171 list_move_tail(&ne->list, &head->entry_list);
172 nm_i->dirty_nat_cnt++;
174 set_nat_flag(ne, IS_DIRTY, true);
177 static void __clear_nat_cache_dirty(struct f2fs_nm_info *nm_i,
178 struct nat_entry *ne)
180 nid_t set = NAT_BLOCK_OFFSET(ne->ni.nid);
181 struct nat_entry_set *head;
183 head = radix_tree_lookup(&nm_i->nat_set_root, set);
185 list_move_tail(&ne->list, &nm_i->nat_entries);
186 set_nat_flag(ne, IS_DIRTY, false);
188 nm_i->dirty_nat_cnt--;
192 static unsigned int __gang_lookup_nat_set(struct f2fs_nm_info *nm_i,
193 nid_t start, unsigned int nr, struct nat_entry_set **ep)
195 return radix_tree_gang_lookup(&nm_i->nat_set_root, (void **)ep,
199 int need_dentry_mark(struct f2fs_sb_info *sbi, nid_t nid)
201 struct f2fs_nm_info *nm_i = NM_I(sbi);
205 down_read(&nm_i->nat_tree_lock);
206 e = __lookup_nat_cache(nm_i, nid);
208 if (!get_nat_flag(e, IS_CHECKPOINTED) &&
209 !get_nat_flag(e, HAS_FSYNCED_INODE))
212 up_read(&nm_i->nat_tree_lock);
216 bool is_checkpointed_node(struct f2fs_sb_info *sbi, nid_t nid)
218 struct f2fs_nm_info *nm_i = NM_I(sbi);
222 down_read(&nm_i->nat_tree_lock);
223 e = __lookup_nat_cache(nm_i, nid);
224 if (e && !get_nat_flag(e, IS_CHECKPOINTED))
226 up_read(&nm_i->nat_tree_lock);
230 bool need_inode_block_update(struct f2fs_sb_info *sbi, nid_t ino)
232 struct f2fs_nm_info *nm_i = NM_I(sbi);
234 bool need_update = true;
236 down_read(&nm_i->nat_tree_lock);
237 e = __lookup_nat_cache(nm_i, ino);
238 if (e && get_nat_flag(e, HAS_LAST_FSYNC) &&
239 (get_nat_flag(e, IS_CHECKPOINTED) ||
240 get_nat_flag(e, HAS_FSYNCED_INODE)))
242 up_read(&nm_i->nat_tree_lock);
246 static struct nat_entry *grab_nat_entry(struct f2fs_nm_info *nm_i, nid_t nid)
248 struct nat_entry *new;
250 new = f2fs_kmem_cache_alloc(nat_entry_slab, GFP_NOFS);
251 f2fs_radix_tree_insert(&nm_i->nat_root, nid, new);
252 memset(new, 0, sizeof(struct nat_entry));
253 nat_set_nid(new, nid);
255 list_add_tail(&new->list, &nm_i->nat_entries);
260 static void cache_nat_entry(struct f2fs_sb_info *sbi, nid_t nid,
261 struct f2fs_nat_entry *ne)
263 struct f2fs_nm_info *nm_i = NM_I(sbi);
266 e = __lookup_nat_cache(nm_i, nid);
268 e = grab_nat_entry(nm_i, nid);
269 node_info_from_raw_nat(&e->ni, ne);
271 f2fs_bug_on(sbi, nat_get_ino(e) != ne->ino ||
272 nat_get_blkaddr(e) != ne->block_addr ||
273 nat_get_version(e) != ne->version);
277 static void set_node_addr(struct f2fs_sb_info *sbi, struct node_info *ni,
278 block_t new_blkaddr, bool fsync_done)
280 struct f2fs_nm_info *nm_i = NM_I(sbi);
283 down_write(&nm_i->nat_tree_lock);
284 e = __lookup_nat_cache(nm_i, ni->nid);
286 e = grab_nat_entry(nm_i, ni->nid);
287 copy_node_info(&e->ni, ni);
288 f2fs_bug_on(sbi, ni->blk_addr == NEW_ADDR);
289 } else if (new_blkaddr == NEW_ADDR) {
291 * when nid is reallocated,
292 * previous nat entry can be remained in nat cache.
293 * So, reinitialize it with new information.
295 copy_node_info(&e->ni, ni);
296 f2fs_bug_on(sbi, ni->blk_addr != NULL_ADDR);
300 f2fs_bug_on(sbi, nat_get_blkaddr(e) != ni->blk_addr);
301 f2fs_bug_on(sbi, nat_get_blkaddr(e) == NULL_ADDR &&
302 new_blkaddr == NULL_ADDR);
303 f2fs_bug_on(sbi, nat_get_blkaddr(e) == NEW_ADDR &&
304 new_blkaddr == NEW_ADDR);
305 f2fs_bug_on(sbi, nat_get_blkaddr(e) != NEW_ADDR &&
306 nat_get_blkaddr(e) != NULL_ADDR &&
307 new_blkaddr == NEW_ADDR);
309 /* increment version no as node is removed */
310 if (nat_get_blkaddr(e) != NEW_ADDR && new_blkaddr == NULL_ADDR) {
311 unsigned char version = nat_get_version(e);
312 nat_set_version(e, inc_node_version(version));
314 /* in order to reuse the nid */
315 if (nm_i->next_scan_nid > ni->nid)
316 nm_i->next_scan_nid = ni->nid;
320 nat_set_blkaddr(e, new_blkaddr);
321 if (new_blkaddr == NEW_ADDR || new_blkaddr == NULL_ADDR)
322 set_nat_flag(e, IS_CHECKPOINTED, false);
323 __set_nat_cache_dirty(nm_i, e);
325 /* update fsync_mark if its inode nat entry is still alive */
326 if (ni->nid != ni->ino)
327 e = __lookup_nat_cache(nm_i, ni->ino);
329 if (fsync_done && ni->nid == ni->ino)
330 set_nat_flag(e, HAS_FSYNCED_INODE, true);
331 set_nat_flag(e, HAS_LAST_FSYNC, fsync_done);
333 up_write(&nm_i->nat_tree_lock);
336 int try_to_free_nats(struct f2fs_sb_info *sbi, int nr_shrink)
338 struct f2fs_nm_info *nm_i = NM_I(sbi);
341 if (!down_write_trylock(&nm_i->nat_tree_lock))
344 while (nr_shrink && !list_empty(&nm_i->nat_entries)) {
345 struct nat_entry *ne;
346 ne = list_first_entry(&nm_i->nat_entries,
347 struct nat_entry, list);
348 __del_from_nat_cache(nm_i, ne);
351 up_write(&nm_i->nat_tree_lock);
352 return nr - nr_shrink;
356 * This function always returns success
358 void get_node_info(struct f2fs_sb_info *sbi, nid_t nid, struct node_info *ni)
360 struct f2fs_nm_info *nm_i = NM_I(sbi);
361 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA);
362 struct f2fs_journal *journal = curseg->journal;
363 nid_t start_nid = START_NID(nid);
364 struct f2fs_nat_block *nat_blk;
365 struct page *page = NULL;
366 struct f2fs_nat_entry ne;
372 /* Check nat cache */
373 down_read(&nm_i->nat_tree_lock);
374 e = __lookup_nat_cache(nm_i, nid);
376 ni->ino = nat_get_ino(e);
377 ni->blk_addr = nat_get_blkaddr(e);
378 ni->version = nat_get_version(e);
379 up_read(&nm_i->nat_tree_lock);
383 memset(&ne, 0, sizeof(struct f2fs_nat_entry));
385 /* Check current segment summary */
386 down_read(&curseg->journal_rwsem);
387 i = lookup_journal_in_cursum(journal, NAT_JOURNAL, nid, 0);
389 ne = nat_in_journal(journal, i);
390 node_info_from_raw_nat(ni, &ne);
392 up_read(&curseg->journal_rwsem);
396 /* Fill node_info from nat page */
397 page = get_current_nat_page(sbi, start_nid);
398 nat_blk = (struct f2fs_nat_block *)page_address(page);
399 ne = nat_blk->entries[nid - start_nid];
400 node_info_from_raw_nat(ni, &ne);
401 f2fs_put_page(page, 1);
403 up_read(&nm_i->nat_tree_lock);
404 /* cache nat entry */
405 down_write(&nm_i->nat_tree_lock);
406 cache_nat_entry(sbi, nid, &ne);
407 up_write(&nm_i->nat_tree_lock);
410 pgoff_t get_next_page_offset(struct dnode_of_data *dn, pgoff_t pgofs)
412 const long direct_index = ADDRS_PER_INODE(dn->inode);
413 const long direct_blks = ADDRS_PER_BLOCK;
414 const long indirect_blks = ADDRS_PER_BLOCK * NIDS_PER_BLOCK;
415 unsigned int skipped_unit = ADDRS_PER_BLOCK;
416 int cur_level = dn->cur_level;
417 int max_level = dn->max_level;
423 while (max_level-- > cur_level)
424 skipped_unit *= NIDS_PER_BLOCK;
426 switch (dn->max_level) {
428 base += 2 * indirect_blks;
430 base += 2 * direct_blks;
432 base += direct_index;
435 f2fs_bug_on(F2FS_I_SB(dn->inode), 1);
438 return ((pgofs - base) / skipped_unit + 1) * skipped_unit + base;
442 * The maximum depth is four.
443 * Offset[0] will have raw inode offset.
445 static int get_node_path(struct inode *inode, long block,
446 int offset[4], unsigned int noffset[4])
448 const long direct_index = ADDRS_PER_INODE(inode);
449 const long direct_blks = ADDRS_PER_BLOCK;
450 const long dptrs_per_blk = NIDS_PER_BLOCK;
451 const long indirect_blks = ADDRS_PER_BLOCK * NIDS_PER_BLOCK;
452 const long dindirect_blks = indirect_blks * NIDS_PER_BLOCK;
458 if (block < direct_index) {
462 block -= direct_index;
463 if (block < direct_blks) {
464 offset[n++] = NODE_DIR1_BLOCK;
470 block -= direct_blks;
471 if (block < direct_blks) {
472 offset[n++] = NODE_DIR2_BLOCK;
478 block -= direct_blks;
479 if (block < indirect_blks) {
480 offset[n++] = NODE_IND1_BLOCK;
482 offset[n++] = block / direct_blks;
483 noffset[n] = 4 + offset[n - 1];
484 offset[n] = block % direct_blks;
488 block -= indirect_blks;
489 if (block < indirect_blks) {
490 offset[n++] = NODE_IND2_BLOCK;
491 noffset[n] = 4 + dptrs_per_blk;
492 offset[n++] = block / direct_blks;
493 noffset[n] = 5 + dptrs_per_blk + offset[n - 1];
494 offset[n] = block % direct_blks;
498 block -= indirect_blks;
499 if (block < dindirect_blks) {
500 offset[n++] = NODE_DIND_BLOCK;
501 noffset[n] = 5 + (dptrs_per_blk * 2);
502 offset[n++] = block / indirect_blks;
503 noffset[n] = 6 + (dptrs_per_blk * 2) +
504 offset[n - 1] * (dptrs_per_blk + 1);
505 offset[n++] = (block / direct_blks) % dptrs_per_blk;
506 noffset[n] = 7 + (dptrs_per_blk * 2) +
507 offset[n - 2] * (dptrs_per_blk + 1) +
509 offset[n] = block % direct_blks;
520 * Caller should call f2fs_put_dnode(dn).
521 * Also, it should grab and release a rwsem by calling f2fs_lock_op() and
522 * f2fs_unlock_op() only if ro is not set RDONLY_NODE.
523 * In the case of RDONLY_NODE, we don't need to care about mutex.
525 int get_dnode_of_data(struct dnode_of_data *dn, pgoff_t index, int mode)
527 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
528 struct page *npage[4];
529 struct page *parent = NULL;
531 unsigned int noffset[4];
536 level = get_node_path(dn->inode, index, offset, noffset);
538 nids[0] = dn->inode->i_ino;
539 npage[0] = dn->inode_page;
542 npage[0] = get_node_page(sbi, nids[0]);
543 if (IS_ERR(npage[0]))
544 return PTR_ERR(npage[0]);
547 /* if inline_data is set, should not report any block indices */
548 if (f2fs_has_inline_data(dn->inode) && index) {
550 f2fs_put_page(npage[0], 1);
556 nids[1] = get_nid(parent, offset[0], true);
557 dn->inode_page = npage[0];
558 dn->inode_page_locked = true;
560 /* get indirect or direct nodes */
561 for (i = 1; i <= level; i++) {
564 if (!nids[i] && mode == ALLOC_NODE) {
566 if (!alloc_nid(sbi, &(nids[i]))) {
572 npage[i] = new_node_page(dn, noffset[i], NULL);
573 if (IS_ERR(npage[i])) {
574 alloc_nid_failed(sbi, nids[i]);
575 err = PTR_ERR(npage[i]);
579 set_nid(parent, offset[i - 1], nids[i], i == 1);
580 alloc_nid_done(sbi, nids[i]);
582 } else if (mode == LOOKUP_NODE_RA && i == level && level > 1) {
583 npage[i] = get_node_page_ra(parent, offset[i - 1]);
584 if (IS_ERR(npage[i])) {
585 err = PTR_ERR(npage[i]);
591 dn->inode_page_locked = false;
594 f2fs_put_page(parent, 1);
598 npage[i] = get_node_page(sbi, nids[i]);
599 if (IS_ERR(npage[i])) {
600 err = PTR_ERR(npage[i]);
601 f2fs_put_page(npage[0], 0);
607 nids[i + 1] = get_nid(parent, offset[i], false);
610 dn->nid = nids[level];
611 dn->ofs_in_node = offset[level];
612 dn->node_page = npage[level];
613 dn->data_blkaddr = datablock_addr(dn->node_page, dn->ofs_in_node);
617 f2fs_put_page(parent, 1);
619 f2fs_put_page(npage[0], 0);
621 dn->inode_page = NULL;
622 dn->node_page = NULL;
623 if (err == -ENOENT) {
625 dn->max_level = level;
630 static void truncate_node(struct dnode_of_data *dn)
632 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
635 get_node_info(sbi, dn->nid, &ni);
636 if (dn->inode->i_blocks == 0) {
637 f2fs_bug_on(sbi, ni.blk_addr != NULL_ADDR);
640 f2fs_bug_on(sbi, ni.blk_addr == NULL_ADDR);
642 /* Deallocate node address */
643 invalidate_blocks(sbi, ni.blk_addr);
644 dec_valid_node_count(sbi, dn->inode);
645 set_node_addr(sbi, &ni, NULL_ADDR, false);
647 if (dn->nid == dn->inode->i_ino) {
648 remove_orphan_inode(sbi, dn->nid);
649 dec_valid_inode_count(sbi);
654 clear_node_page_dirty(dn->node_page);
655 set_sbi_flag(sbi, SBI_IS_DIRTY);
657 f2fs_put_page(dn->node_page, 1);
659 invalidate_mapping_pages(NODE_MAPPING(sbi),
660 dn->node_page->index, dn->node_page->index);
662 dn->node_page = NULL;
663 trace_f2fs_truncate_node(dn->inode, dn->nid, ni.blk_addr);
666 static int truncate_dnode(struct dnode_of_data *dn)
673 /* get direct node */
674 page = get_node_page(F2FS_I_SB(dn->inode), dn->nid);
675 if (IS_ERR(page) && PTR_ERR(page) == -ENOENT)
677 else if (IS_ERR(page))
678 return PTR_ERR(page);
680 /* Make dnode_of_data for parameter */
681 dn->node_page = page;
683 truncate_data_blocks(dn);
688 static int truncate_nodes(struct dnode_of_data *dn, unsigned int nofs,
691 struct dnode_of_data rdn = *dn;
693 struct f2fs_node *rn;
695 unsigned int child_nofs;
700 return NIDS_PER_BLOCK + 1;
702 trace_f2fs_truncate_nodes_enter(dn->inode, dn->nid, dn->data_blkaddr);
704 page = get_node_page(F2FS_I_SB(dn->inode), dn->nid);
706 trace_f2fs_truncate_nodes_exit(dn->inode, PTR_ERR(page));
707 return PTR_ERR(page);
710 rn = F2FS_NODE(page);
712 for (i = ofs; i < NIDS_PER_BLOCK; i++, freed++) {
713 child_nid = le32_to_cpu(rn->in.nid[i]);
717 ret = truncate_dnode(&rdn);
720 if (set_nid(page, i, 0, false))
721 dn->node_changed = true;
724 child_nofs = nofs + ofs * (NIDS_PER_BLOCK + 1) + 1;
725 for (i = ofs; i < NIDS_PER_BLOCK; i++) {
726 child_nid = le32_to_cpu(rn->in.nid[i]);
727 if (child_nid == 0) {
728 child_nofs += NIDS_PER_BLOCK + 1;
732 ret = truncate_nodes(&rdn, child_nofs, 0, depth - 1);
733 if (ret == (NIDS_PER_BLOCK + 1)) {
734 if (set_nid(page, i, 0, false))
735 dn->node_changed = true;
737 } else if (ret < 0 && ret != -ENOENT) {
745 /* remove current indirect node */
746 dn->node_page = page;
750 f2fs_put_page(page, 1);
752 trace_f2fs_truncate_nodes_exit(dn->inode, freed);
756 f2fs_put_page(page, 1);
757 trace_f2fs_truncate_nodes_exit(dn->inode, ret);
761 static int truncate_partial_nodes(struct dnode_of_data *dn,
762 struct f2fs_inode *ri, int *offset, int depth)
764 struct page *pages[2];
771 nid[0] = le32_to_cpu(ri->i_nid[offset[0] - NODE_DIR1_BLOCK]);
775 /* get indirect nodes in the path */
776 for (i = 0; i < idx + 1; i++) {
777 /* reference count'll be increased */
778 pages[i] = get_node_page(F2FS_I_SB(dn->inode), nid[i]);
779 if (IS_ERR(pages[i])) {
780 err = PTR_ERR(pages[i]);
784 nid[i + 1] = get_nid(pages[i], offset[i + 1], false);
787 /* free direct nodes linked to a partial indirect node */
788 for (i = offset[idx + 1]; i < NIDS_PER_BLOCK; i++) {
789 child_nid = get_nid(pages[idx], i, false);
793 err = truncate_dnode(dn);
796 if (set_nid(pages[idx], i, 0, false))
797 dn->node_changed = true;
800 if (offset[idx + 1] == 0) {
801 dn->node_page = pages[idx];
805 f2fs_put_page(pages[idx], 1);
811 for (i = idx; i >= 0; i--)
812 f2fs_put_page(pages[i], 1);
814 trace_f2fs_truncate_partial_nodes(dn->inode, nid, depth, err);
820 * All the block addresses of data and nodes should be nullified.
822 int truncate_inode_blocks(struct inode *inode, pgoff_t from)
824 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
825 int err = 0, cont = 1;
826 int level, offset[4], noffset[4];
827 unsigned int nofs = 0;
828 struct f2fs_inode *ri;
829 struct dnode_of_data dn;
832 trace_f2fs_truncate_inode_blocks_enter(inode, from);
834 level = get_node_path(inode, from, offset, noffset);
836 page = get_node_page(sbi, inode->i_ino);
838 trace_f2fs_truncate_inode_blocks_exit(inode, PTR_ERR(page));
839 return PTR_ERR(page);
842 set_new_dnode(&dn, inode, page, NULL, 0);
845 ri = F2FS_INODE(page);
853 if (!offset[level - 1])
855 err = truncate_partial_nodes(&dn, ri, offset, level);
856 if (err < 0 && err != -ENOENT)
858 nofs += 1 + NIDS_PER_BLOCK;
861 nofs = 5 + 2 * NIDS_PER_BLOCK;
862 if (!offset[level - 1])
864 err = truncate_partial_nodes(&dn, ri, offset, level);
865 if (err < 0 && err != -ENOENT)
874 dn.nid = le32_to_cpu(ri->i_nid[offset[0] - NODE_DIR1_BLOCK]);
876 case NODE_DIR1_BLOCK:
877 case NODE_DIR2_BLOCK:
878 err = truncate_dnode(&dn);
881 case NODE_IND1_BLOCK:
882 case NODE_IND2_BLOCK:
883 err = truncate_nodes(&dn, nofs, offset[1], 2);
886 case NODE_DIND_BLOCK:
887 err = truncate_nodes(&dn, nofs, offset[1], 3);
894 if (err < 0 && err != -ENOENT)
896 if (offset[1] == 0 &&
897 ri->i_nid[offset[0] - NODE_DIR1_BLOCK]) {
899 if (unlikely(page->mapping != NODE_MAPPING(sbi))) {
900 f2fs_put_page(page, 1);
903 f2fs_wait_on_page_writeback(page, NODE, true);
904 ri->i_nid[offset[0] - NODE_DIR1_BLOCK] = 0;
905 set_page_dirty(page);
913 f2fs_put_page(page, 0);
914 trace_f2fs_truncate_inode_blocks_exit(inode, err);
915 return err > 0 ? 0 : err;
918 int truncate_xattr_node(struct inode *inode, struct page *page)
920 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
921 nid_t nid = F2FS_I(inode)->i_xattr_nid;
922 struct dnode_of_data dn;
928 npage = get_node_page(sbi, nid);
930 return PTR_ERR(npage);
932 F2FS_I(inode)->i_xattr_nid = 0;
934 /* need to do checkpoint during fsync */
935 F2FS_I(inode)->xattr_ver = cur_cp_version(F2FS_CKPT(sbi));
937 set_new_dnode(&dn, inode, page, npage, nid);
940 dn.inode_page_locked = true;
946 * Caller should grab and release a rwsem by calling f2fs_lock_op() and
949 int remove_inode_page(struct inode *inode)
951 struct dnode_of_data dn;
954 set_new_dnode(&dn, inode, NULL, NULL, inode->i_ino);
955 err = get_dnode_of_data(&dn, 0, LOOKUP_NODE);
959 err = truncate_xattr_node(inode, dn.inode_page);
965 /* remove potential inline_data blocks */
966 if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
967 S_ISLNK(inode->i_mode))
968 truncate_data_blocks_range(&dn, 1);
970 /* 0 is possible, after f2fs_new_inode() has failed */
971 f2fs_bug_on(F2FS_I_SB(inode),
972 inode->i_blocks != 0 && inode->i_blocks != 1);
974 /* will put inode & node pages */
979 struct page *new_inode_page(struct inode *inode)
981 struct dnode_of_data dn;
983 /* allocate inode page for new inode */
984 set_new_dnode(&dn, inode, NULL, NULL, inode->i_ino);
986 /* caller should f2fs_put_page(page, 1); */
987 return new_node_page(&dn, 0, NULL);
990 struct page *new_node_page(struct dnode_of_data *dn,
991 unsigned int ofs, struct page *ipage)
993 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
994 struct node_info old_ni, new_ni;
998 if (unlikely(is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC)))
999 return ERR_PTR(-EPERM);
1001 page = grab_cache_page(NODE_MAPPING(sbi), dn->nid);
1003 return ERR_PTR(-ENOMEM);
1005 if (unlikely(!inc_valid_node_count(sbi, dn->inode))) {
1010 get_node_info(sbi, dn->nid, &old_ni);
1012 /* Reinitialize old_ni with new node page */
1013 f2fs_bug_on(sbi, old_ni.blk_addr != NULL_ADDR);
1015 new_ni.ino = dn->inode->i_ino;
1016 set_node_addr(sbi, &new_ni, NEW_ADDR, false);
1018 f2fs_wait_on_page_writeback(page, NODE, true);
1019 fill_node_footer(page, dn->nid, dn->inode->i_ino, ofs, true);
1020 set_cold_node(dn->inode, page);
1021 SetPageUptodate(page);
1022 if (set_page_dirty(page))
1023 dn->node_changed = true;
1025 if (f2fs_has_xattr_block(ofs))
1026 F2FS_I(dn->inode)->i_xattr_nid = dn->nid;
1028 dn->node_page = page;
1030 update_inode(dn->inode, ipage);
1032 sync_inode_page(dn);
1034 inc_valid_inode_count(sbi);
1039 clear_node_page_dirty(page);
1040 f2fs_put_page(page, 1);
1041 return ERR_PTR(err);
1045 * Caller should do after getting the following values.
1046 * 0: f2fs_put_page(page, 0)
1047 * LOCKED_PAGE or error: f2fs_put_page(page, 1)
1049 static int read_node_page(struct page *page, int rw)
1051 struct f2fs_sb_info *sbi = F2FS_P_SB(page);
1052 struct node_info ni;
1053 struct f2fs_io_info fio = {
1058 .encrypted_page = NULL,
1061 get_node_info(sbi, page->index, &ni);
1063 if (unlikely(ni.blk_addr == NULL_ADDR)) {
1064 ClearPageUptodate(page);
1068 if (PageUptodate(page))
1071 fio.new_blkaddr = fio.old_blkaddr = ni.blk_addr;
1072 return f2fs_submit_page_bio(&fio);
1076 * Readahead a node page
1078 void ra_node_page(struct f2fs_sb_info *sbi, nid_t nid)
1085 f2fs_bug_on(sbi, check_nid_range(sbi, nid));
1087 apage = find_get_page(NODE_MAPPING(sbi), nid);
1088 if (apage && PageUptodate(apage)) {
1089 f2fs_put_page(apage, 0);
1092 f2fs_put_page(apage, 0);
1094 apage = grab_cache_page(NODE_MAPPING(sbi), nid);
1098 err = read_node_page(apage, READA);
1099 f2fs_put_page(apage, err ? 1 : 0);
1103 * readahead MAX_RA_NODE number of node pages.
1105 void ra_node_pages(struct page *parent, int start)
1107 struct f2fs_sb_info *sbi = F2FS_P_SB(parent);
1108 struct blk_plug plug;
1112 blk_start_plug(&plug);
1114 /* Then, try readahead for siblings of the desired node */
1115 end = start + MAX_RA_NODE;
1116 end = min(end, NIDS_PER_BLOCK);
1117 for (i = start; i < end; i++) {
1118 nid = get_nid(parent, i, false);
1119 ra_node_page(sbi, nid);
1122 blk_finish_plug(&plug);
1125 struct page *__get_node_page(struct f2fs_sb_info *sbi, pgoff_t nid,
1126 struct page *parent, int start)
1132 return ERR_PTR(-ENOENT);
1133 f2fs_bug_on(sbi, check_nid_range(sbi, nid));
1135 page = grab_cache_page(NODE_MAPPING(sbi), nid);
1137 return ERR_PTR(-ENOMEM);
1139 err = read_node_page(page, READ_SYNC);
1141 f2fs_put_page(page, 1);
1142 return ERR_PTR(err);
1143 } else if (err == LOCKED_PAGE) {
1148 ra_node_pages(parent, start + 1);
1152 if (unlikely(!PageUptodate(page))) {
1153 f2fs_put_page(page, 1);
1154 return ERR_PTR(-EIO);
1156 if (unlikely(page->mapping != NODE_MAPPING(sbi))) {
1157 f2fs_put_page(page, 1);
1161 f2fs_bug_on(sbi, nid != nid_of_node(page));
1165 struct page *get_node_page(struct f2fs_sb_info *sbi, pgoff_t nid)
1167 return __get_node_page(sbi, nid, NULL, 0);
1170 struct page *get_node_page_ra(struct page *parent, int start)
1172 struct f2fs_sb_info *sbi = F2FS_P_SB(parent);
1173 nid_t nid = get_nid(parent, start, false);
1175 return __get_node_page(sbi, nid, parent, start);
1178 void sync_inode_page(struct dnode_of_data *dn)
1182 if (IS_INODE(dn->node_page) || dn->inode_page == dn->node_page) {
1183 ret = update_inode(dn->inode, dn->node_page);
1184 } else if (dn->inode_page) {
1185 if (!dn->inode_page_locked)
1186 lock_page(dn->inode_page);
1187 ret = update_inode(dn->inode, dn->inode_page);
1188 if (!dn->inode_page_locked)
1189 unlock_page(dn->inode_page);
1191 ret = update_inode_page(dn->inode);
1193 dn->node_changed = ret ? true: false;
1196 static void flush_inline_data(struct f2fs_sb_info *sbi, nid_t ino)
1198 struct inode *inode;
1201 /* should flush inline_data before evict_inode */
1202 inode = ilookup(sbi->sb, ino);
1206 page = pagecache_get_page(inode->i_mapping, 0, FGP_LOCK|FGP_NOWAIT, 0);
1210 if (!PageUptodate(page))
1213 if (!PageDirty(page))
1216 if (!clear_page_dirty_for_io(page))
1219 if (!f2fs_write_inline_data(inode, page))
1220 inode_dec_dirty_pages(inode);
1222 set_page_dirty(page);
1224 f2fs_put_page(page, 1);
1229 int sync_node_pages(struct f2fs_sb_info *sbi, nid_t ino,
1230 struct writeback_control *wbc)
1233 struct pagevec pvec;
1234 int step = ino ? 2 : 0;
1235 int nwritten = 0, wrote = 0;
1237 pagevec_init(&pvec, 0);
1243 while (index <= end) {
1245 nr_pages = pagevec_lookup_tag(&pvec, NODE_MAPPING(sbi), &index,
1246 PAGECACHE_TAG_DIRTY,
1247 min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1);
1251 for (i = 0; i < nr_pages; i++) {
1252 struct page *page = pvec.pages[i];
1254 if (unlikely(f2fs_cp_error(sbi))) {
1255 pagevec_release(&pvec);
1260 * flushing sequence with step:
1265 if (step == 0 && IS_DNODE(page))
1267 if (step == 1 && (!IS_DNODE(page) ||
1268 is_cold_node(page)))
1270 if (step == 2 && (!IS_DNODE(page) ||
1271 !is_cold_node(page)))
1276 * we should not skip writing node pages.
1279 if (ino && ino_of_node(page) == ino)
1281 else if (!trylock_page(page))
1284 if (unlikely(page->mapping != NODE_MAPPING(sbi))) {
1289 if (ino && ino_of_node(page) != ino)
1290 goto continue_unlock;
1292 if (!PageDirty(page)) {
1293 /* someone wrote it for us */
1294 goto continue_unlock;
1297 /* flush inline_data */
1298 if (!ino && is_inline_node(page)) {
1299 clear_inline_node(page);
1301 flush_inline_data(sbi, ino_of_node(page));
1305 f2fs_wait_on_page_writeback(page, NODE, true);
1307 BUG_ON(PageWriteback(page));
1308 if (!clear_page_dirty_for_io(page))
1309 goto continue_unlock;
1311 /* called by fsync() */
1312 if (ino && IS_DNODE(page)) {
1313 set_fsync_mark(page, 1);
1315 set_dentry_mark(page,
1316 need_dentry_mark(sbi, ino));
1319 set_fsync_mark(page, 0);
1320 set_dentry_mark(page, 0);
1323 if (NODE_MAPPING(sbi)->a_ops->writepage(page, wbc))
1328 if (--wbc->nr_to_write == 0)
1331 pagevec_release(&pvec);
1334 if (wbc->nr_to_write == 0) {
1347 f2fs_submit_merged_bio_cond(sbi, NULL, NULL,
1350 f2fs_submit_merged_bio(sbi, NODE, WRITE);
1355 int wait_on_node_pages_writeback(struct f2fs_sb_info *sbi, nid_t ino)
1357 pgoff_t index = 0, end = LONG_MAX;
1358 struct pagevec pvec;
1359 int ret2 = 0, ret = 0;
1361 pagevec_init(&pvec, 0);
1363 while (index <= end) {
1365 nr_pages = pagevec_lookup_tag(&pvec, NODE_MAPPING(sbi), &index,
1366 PAGECACHE_TAG_WRITEBACK,
1367 min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1);
1371 for (i = 0; i < nr_pages; i++) {
1372 struct page *page = pvec.pages[i];
1374 /* until radix tree lookup accepts end_index */
1375 if (unlikely(page->index > end))
1378 if (ino && ino_of_node(page) == ino) {
1379 f2fs_wait_on_page_writeback(page, NODE, true);
1380 if (TestClearPageError(page))
1384 pagevec_release(&pvec);
1388 if (unlikely(test_and_clear_bit(AS_ENOSPC, &NODE_MAPPING(sbi)->flags)))
1390 if (unlikely(test_and_clear_bit(AS_EIO, &NODE_MAPPING(sbi)->flags)))
1397 static int f2fs_write_node_page(struct page *page,
1398 struct writeback_control *wbc)
1400 struct f2fs_sb_info *sbi = F2FS_P_SB(page);
1402 struct node_info ni;
1403 struct f2fs_io_info fio = {
1406 .rw = (wbc->sync_mode == WB_SYNC_ALL) ? WRITE_SYNC : WRITE,
1408 .encrypted_page = NULL,
1411 trace_f2fs_writepage(page, NODE);
1413 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
1415 if (unlikely(f2fs_cp_error(sbi)))
1418 /* get old block addr of this node page */
1419 nid = nid_of_node(page);
1420 f2fs_bug_on(sbi, page->index != nid);
1422 if (wbc->for_reclaim) {
1423 if (!down_read_trylock(&sbi->node_write))
1426 down_read(&sbi->node_write);
1429 get_node_info(sbi, nid, &ni);
1431 /* This page is already truncated */
1432 if (unlikely(ni.blk_addr == NULL_ADDR)) {
1433 ClearPageUptodate(page);
1434 dec_page_count(sbi, F2FS_DIRTY_NODES);
1435 up_read(&sbi->node_write);
1440 set_page_writeback(page);
1441 fio.old_blkaddr = ni.blk_addr;
1442 write_node_page(nid, &fio);
1443 set_node_addr(sbi, &ni, fio.new_blkaddr, is_fsync_dnode(page));
1444 dec_page_count(sbi, F2FS_DIRTY_NODES);
1445 up_read(&sbi->node_write);
1447 if (wbc->for_reclaim)
1448 f2fs_submit_merged_bio_cond(sbi, NULL, page, 0, NODE, WRITE);
1452 if (unlikely(f2fs_cp_error(sbi)))
1453 f2fs_submit_merged_bio(sbi, NODE, WRITE);
1458 redirty_page_for_writepage(wbc, page);
1459 return AOP_WRITEPAGE_ACTIVATE;
1462 static int f2fs_write_node_pages(struct address_space *mapping,
1463 struct writeback_control *wbc)
1465 struct f2fs_sb_info *sbi = F2FS_M_SB(mapping);
1468 /* balancing f2fs's metadata in background */
1469 f2fs_balance_fs_bg(sbi);
1471 /* collect a number of dirty node pages and write together */
1472 if (get_pages(sbi, F2FS_DIRTY_NODES) < nr_pages_to_skip(sbi, NODE))
1475 trace_f2fs_writepages(mapping->host, wbc, NODE);
1477 diff = nr_pages_to_write(sbi, NODE, wbc);
1478 wbc->sync_mode = WB_SYNC_NONE;
1479 sync_node_pages(sbi, 0, wbc);
1480 wbc->nr_to_write = max((long)0, wbc->nr_to_write - diff);
1484 wbc->pages_skipped += get_pages(sbi, F2FS_DIRTY_NODES);
1485 trace_f2fs_writepages(mapping->host, wbc, NODE);
1489 static int f2fs_set_node_page_dirty(struct page *page)
1491 trace_f2fs_set_page_dirty(page, NODE);
1493 SetPageUptodate(page);
1494 if (!PageDirty(page)) {
1495 __set_page_dirty_nobuffers(page);
1496 inc_page_count(F2FS_P_SB(page), F2FS_DIRTY_NODES);
1497 SetPagePrivate(page);
1498 f2fs_trace_pid(page);
1505 * Structure of the f2fs node operations
1507 const struct address_space_operations f2fs_node_aops = {
1508 .writepage = f2fs_write_node_page,
1509 .writepages = f2fs_write_node_pages,
1510 .set_page_dirty = f2fs_set_node_page_dirty,
1511 .invalidatepage = f2fs_invalidate_page,
1512 .releasepage = f2fs_release_page,
1515 static struct free_nid *__lookup_free_nid_list(struct f2fs_nm_info *nm_i,
1518 return radix_tree_lookup(&nm_i->free_nid_root, n);
1521 static void __del_from_free_nid_list(struct f2fs_nm_info *nm_i,
1525 radix_tree_delete(&nm_i->free_nid_root, i->nid);
1528 static int add_free_nid(struct f2fs_sb_info *sbi, nid_t nid, bool build)
1530 struct f2fs_nm_info *nm_i = NM_I(sbi);
1532 struct nat_entry *ne;
1533 bool allocated = false;
1535 if (!available_free_memory(sbi, FREE_NIDS))
1538 /* 0 nid should not be used */
1539 if (unlikely(nid == 0))
1543 /* do not add allocated nids */
1544 ne = __lookup_nat_cache(nm_i, nid);
1545 if (ne && (!get_nat_flag(ne, IS_CHECKPOINTED) ||
1546 nat_get_blkaddr(ne) != NULL_ADDR))
1552 i = f2fs_kmem_cache_alloc(free_nid_slab, GFP_NOFS);
1556 if (radix_tree_preload(GFP_NOFS)) {
1557 kmem_cache_free(free_nid_slab, i);
1561 spin_lock(&nm_i->free_nid_list_lock);
1562 if (radix_tree_insert(&nm_i->free_nid_root, i->nid, i)) {
1563 spin_unlock(&nm_i->free_nid_list_lock);
1564 radix_tree_preload_end();
1565 kmem_cache_free(free_nid_slab, i);
1568 list_add_tail(&i->list, &nm_i->free_nid_list);
1570 spin_unlock(&nm_i->free_nid_list_lock);
1571 radix_tree_preload_end();
1575 static void remove_free_nid(struct f2fs_nm_info *nm_i, nid_t nid)
1578 bool need_free = false;
1580 spin_lock(&nm_i->free_nid_list_lock);
1581 i = __lookup_free_nid_list(nm_i, nid);
1582 if (i && i->state == NID_NEW) {
1583 __del_from_free_nid_list(nm_i, i);
1587 spin_unlock(&nm_i->free_nid_list_lock);
1590 kmem_cache_free(free_nid_slab, i);
1593 static void scan_nat_page(struct f2fs_sb_info *sbi,
1594 struct page *nat_page, nid_t start_nid)
1596 struct f2fs_nm_info *nm_i = NM_I(sbi);
1597 struct f2fs_nat_block *nat_blk = page_address(nat_page);
1601 i = start_nid % NAT_ENTRY_PER_BLOCK;
1603 for (; i < NAT_ENTRY_PER_BLOCK; i++, start_nid++) {
1605 if (unlikely(start_nid >= nm_i->max_nid))
1608 blk_addr = le32_to_cpu(nat_blk->entries[i].block_addr);
1609 f2fs_bug_on(sbi, blk_addr == NEW_ADDR);
1610 if (blk_addr == NULL_ADDR) {
1611 if (add_free_nid(sbi, start_nid, true) < 0)
1617 static void build_free_nids(struct f2fs_sb_info *sbi)
1619 struct f2fs_nm_info *nm_i = NM_I(sbi);
1620 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA);
1621 struct f2fs_journal *journal = curseg->journal;
1623 nid_t nid = nm_i->next_scan_nid;
1625 /* Enough entries */
1626 if (nm_i->fcnt > NAT_ENTRY_PER_BLOCK)
1629 /* readahead nat pages to be scanned */
1630 ra_meta_pages(sbi, NAT_BLOCK_OFFSET(nid), FREE_NID_PAGES,
1633 down_read(&nm_i->nat_tree_lock);
1636 struct page *page = get_current_nat_page(sbi, nid);
1638 scan_nat_page(sbi, page, nid);
1639 f2fs_put_page(page, 1);
1641 nid += (NAT_ENTRY_PER_BLOCK - (nid % NAT_ENTRY_PER_BLOCK));
1642 if (unlikely(nid >= nm_i->max_nid))
1645 if (++i >= FREE_NID_PAGES)
1649 /* go to the next free nat pages to find free nids abundantly */
1650 nm_i->next_scan_nid = nid;
1652 /* find free nids from current sum_pages */
1653 down_read(&curseg->journal_rwsem);
1654 for (i = 0; i < nats_in_cursum(journal); i++) {
1657 addr = le32_to_cpu(nat_in_journal(journal, i).block_addr);
1658 nid = le32_to_cpu(nid_in_journal(journal, i));
1659 if (addr == NULL_ADDR)
1660 add_free_nid(sbi, nid, true);
1662 remove_free_nid(nm_i, nid);
1664 up_read(&curseg->journal_rwsem);
1665 up_read(&nm_i->nat_tree_lock);
1667 ra_meta_pages(sbi, NAT_BLOCK_OFFSET(nm_i->next_scan_nid),
1668 nm_i->ra_nid_pages, META_NAT, false);
1672 * If this function returns success, caller can obtain a new nid
1673 * from second parameter of this function.
1674 * The returned nid could be used ino as well as nid when inode is created.
1676 bool alloc_nid(struct f2fs_sb_info *sbi, nid_t *nid)
1678 struct f2fs_nm_info *nm_i = NM_I(sbi);
1679 struct free_nid *i = NULL;
1681 if (unlikely(sbi->total_valid_node_count + 1 > nm_i->available_nids))
1684 spin_lock(&nm_i->free_nid_list_lock);
1686 /* We should not use stale free nids created by build_free_nids */
1687 if (nm_i->fcnt && !on_build_free_nids(nm_i)) {
1688 f2fs_bug_on(sbi, list_empty(&nm_i->free_nid_list));
1689 list_for_each_entry(i, &nm_i->free_nid_list, list)
1690 if (i->state == NID_NEW)
1693 f2fs_bug_on(sbi, i->state != NID_NEW);
1695 i->state = NID_ALLOC;
1697 spin_unlock(&nm_i->free_nid_list_lock);
1700 spin_unlock(&nm_i->free_nid_list_lock);
1702 /* Let's scan nat pages and its caches to get free nids */
1703 mutex_lock(&nm_i->build_lock);
1704 build_free_nids(sbi);
1705 mutex_unlock(&nm_i->build_lock);
1710 * alloc_nid() should be called prior to this function.
1712 void alloc_nid_done(struct f2fs_sb_info *sbi, nid_t nid)
1714 struct f2fs_nm_info *nm_i = NM_I(sbi);
1717 spin_lock(&nm_i->free_nid_list_lock);
1718 i = __lookup_free_nid_list(nm_i, nid);
1719 f2fs_bug_on(sbi, !i || i->state != NID_ALLOC);
1720 __del_from_free_nid_list(nm_i, i);
1721 spin_unlock(&nm_i->free_nid_list_lock);
1723 kmem_cache_free(free_nid_slab, i);
1727 * alloc_nid() should be called prior to this function.
1729 void alloc_nid_failed(struct f2fs_sb_info *sbi, nid_t nid)
1731 struct f2fs_nm_info *nm_i = NM_I(sbi);
1733 bool need_free = false;
1738 spin_lock(&nm_i->free_nid_list_lock);
1739 i = __lookup_free_nid_list(nm_i, nid);
1740 f2fs_bug_on(sbi, !i || i->state != NID_ALLOC);
1741 if (!available_free_memory(sbi, FREE_NIDS)) {
1742 __del_from_free_nid_list(nm_i, i);
1748 spin_unlock(&nm_i->free_nid_list_lock);
1751 kmem_cache_free(free_nid_slab, i);
1754 int try_to_free_nids(struct f2fs_sb_info *sbi, int nr_shrink)
1756 struct f2fs_nm_info *nm_i = NM_I(sbi);
1757 struct free_nid *i, *next;
1760 if (!mutex_trylock(&nm_i->build_lock))
1763 spin_lock(&nm_i->free_nid_list_lock);
1764 list_for_each_entry_safe(i, next, &nm_i->free_nid_list, list) {
1765 if (nr_shrink <= 0 || nm_i->fcnt <= NAT_ENTRY_PER_BLOCK)
1767 if (i->state == NID_ALLOC)
1769 __del_from_free_nid_list(nm_i, i);
1770 kmem_cache_free(free_nid_slab, i);
1774 spin_unlock(&nm_i->free_nid_list_lock);
1775 mutex_unlock(&nm_i->build_lock);
1777 return nr - nr_shrink;
1780 void recover_inline_xattr(struct inode *inode, struct page *page)
1782 void *src_addr, *dst_addr;
1785 struct f2fs_inode *ri;
1787 ipage = get_node_page(F2FS_I_SB(inode), inode->i_ino);
1788 f2fs_bug_on(F2FS_I_SB(inode), IS_ERR(ipage));
1790 ri = F2FS_INODE(page);
1791 if (!(ri->i_inline & F2FS_INLINE_XATTR)) {
1792 clear_inode_flag(F2FS_I(inode), FI_INLINE_XATTR);
1796 dst_addr = inline_xattr_addr(ipage);
1797 src_addr = inline_xattr_addr(page);
1798 inline_size = inline_xattr_size(inode);
1800 f2fs_wait_on_page_writeback(ipage, NODE, true);
1801 memcpy(dst_addr, src_addr, inline_size);
1803 update_inode(inode, ipage);
1804 f2fs_put_page(ipage, 1);
1807 void recover_xattr_data(struct inode *inode, struct page *page, block_t blkaddr)
1809 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1810 nid_t prev_xnid = F2FS_I(inode)->i_xattr_nid;
1811 nid_t new_xnid = nid_of_node(page);
1812 struct node_info ni;
1814 /* 1: invalidate the previous xattr nid */
1818 /* Deallocate node address */
1819 get_node_info(sbi, prev_xnid, &ni);
1820 f2fs_bug_on(sbi, ni.blk_addr == NULL_ADDR);
1821 invalidate_blocks(sbi, ni.blk_addr);
1822 dec_valid_node_count(sbi, inode);
1823 set_node_addr(sbi, &ni, NULL_ADDR, false);
1826 /* 2: allocate new xattr nid */
1827 if (unlikely(!inc_valid_node_count(sbi, inode)))
1828 f2fs_bug_on(sbi, 1);
1830 remove_free_nid(NM_I(sbi), new_xnid);
1831 get_node_info(sbi, new_xnid, &ni);
1832 ni.ino = inode->i_ino;
1833 set_node_addr(sbi, &ni, NEW_ADDR, false);
1834 F2FS_I(inode)->i_xattr_nid = new_xnid;
1836 /* 3: update xattr blkaddr */
1837 refresh_sit_entry(sbi, NEW_ADDR, blkaddr);
1838 set_node_addr(sbi, &ni, blkaddr, false);
1840 update_inode_page(inode);
1843 int recover_inode_page(struct f2fs_sb_info *sbi, struct page *page)
1845 struct f2fs_inode *src, *dst;
1846 nid_t ino = ino_of_node(page);
1847 struct node_info old_ni, new_ni;
1850 get_node_info(sbi, ino, &old_ni);
1852 if (unlikely(old_ni.blk_addr != NULL_ADDR))
1855 ipage = grab_cache_page(NODE_MAPPING(sbi), ino);
1859 /* Should not use this inode from free nid list */
1860 remove_free_nid(NM_I(sbi), ino);
1862 SetPageUptodate(ipage);
1863 fill_node_footer(ipage, ino, ino, 0, true);
1865 src = F2FS_INODE(page);
1866 dst = F2FS_INODE(ipage);
1868 memcpy(dst, src, (unsigned long)&src->i_ext - (unsigned long)src);
1870 dst->i_blocks = cpu_to_le64(1);
1871 dst->i_links = cpu_to_le32(1);
1872 dst->i_xattr_nid = 0;
1873 dst->i_inline = src->i_inline & F2FS_INLINE_XATTR;
1878 if (unlikely(!inc_valid_node_count(sbi, NULL)))
1880 set_node_addr(sbi, &new_ni, NEW_ADDR, false);
1881 inc_valid_inode_count(sbi);
1882 set_page_dirty(ipage);
1883 f2fs_put_page(ipage, 1);
1887 int restore_node_summary(struct f2fs_sb_info *sbi,
1888 unsigned int segno, struct f2fs_summary_block *sum)
1890 struct f2fs_node *rn;
1891 struct f2fs_summary *sum_entry;
1893 int bio_blocks = MAX_BIO_BLOCKS(sbi);
1894 int i, idx, last_offset, nrpages;
1896 /* scan the node segment */
1897 last_offset = sbi->blocks_per_seg;
1898 addr = START_BLOCK(sbi, segno);
1899 sum_entry = &sum->entries[0];
1901 for (i = 0; i < last_offset; i += nrpages, addr += nrpages) {
1902 nrpages = min(last_offset - i, bio_blocks);
1904 /* readahead node pages */
1905 ra_meta_pages(sbi, addr, nrpages, META_POR, true);
1907 for (idx = addr; idx < addr + nrpages; idx++) {
1908 struct page *page = get_tmp_page(sbi, idx);
1910 rn = F2FS_NODE(page);
1911 sum_entry->nid = rn->footer.nid;
1912 sum_entry->version = 0;
1913 sum_entry->ofs_in_node = 0;
1915 f2fs_put_page(page, 1);
1918 invalidate_mapping_pages(META_MAPPING(sbi), addr,
1924 static void remove_nats_in_journal(struct f2fs_sb_info *sbi)
1926 struct f2fs_nm_info *nm_i = NM_I(sbi);
1927 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA);
1928 struct f2fs_journal *journal = curseg->journal;
1931 down_write(&curseg->journal_rwsem);
1932 for (i = 0; i < nats_in_cursum(journal); i++) {
1933 struct nat_entry *ne;
1934 struct f2fs_nat_entry raw_ne;
1935 nid_t nid = le32_to_cpu(nid_in_journal(journal, i));
1937 raw_ne = nat_in_journal(journal, i);
1939 ne = __lookup_nat_cache(nm_i, nid);
1941 ne = grab_nat_entry(nm_i, nid);
1942 node_info_from_raw_nat(&ne->ni, &raw_ne);
1944 __set_nat_cache_dirty(nm_i, ne);
1946 update_nats_in_cursum(journal, -i);
1947 up_write(&curseg->journal_rwsem);
1950 static void __adjust_nat_entry_set(struct nat_entry_set *nes,
1951 struct list_head *head, int max)
1953 struct nat_entry_set *cur;
1955 if (nes->entry_cnt >= max)
1958 list_for_each_entry(cur, head, set_list) {
1959 if (cur->entry_cnt >= nes->entry_cnt) {
1960 list_add(&nes->set_list, cur->set_list.prev);
1965 list_add_tail(&nes->set_list, head);
1968 static void __flush_nat_entry_set(struct f2fs_sb_info *sbi,
1969 struct nat_entry_set *set)
1971 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA);
1972 struct f2fs_journal *journal = curseg->journal;
1973 nid_t start_nid = set->set * NAT_ENTRY_PER_BLOCK;
1974 bool to_journal = true;
1975 struct f2fs_nat_block *nat_blk;
1976 struct nat_entry *ne, *cur;
1977 struct page *page = NULL;
1980 * there are two steps to flush nat entries:
1981 * #1, flush nat entries to journal in current hot data summary block.
1982 * #2, flush nat entries to nat page.
1984 if (!__has_cursum_space(journal, set->entry_cnt, NAT_JOURNAL))
1988 down_write(&curseg->journal_rwsem);
1990 page = get_next_nat_page(sbi, start_nid);
1991 nat_blk = page_address(page);
1992 f2fs_bug_on(sbi, !nat_blk);
1995 /* flush dirty nats in nat entry set */
1996 list_for_each_entry_safe(ne, cur, &set->entry_list, list) {
1997 struct f2fs_nat_entry *raw_ne;
1998 nid_t nid = nat_get_nid(ne);
2001 if (nat_get_blkaddr(ne) == NEW_ADDR)
2005 offset = lookup_journal_in_cursum(journal,
2006 NAT_JOURNAL, nid, 1);
2007 f2fs_bug_on(sbi, offset < 0);
2008 raw_ne = &nat_in_journal(journal, offset);
2009 nid_in_journal(journal, offset) = cpu_to_le32(nid);
2011 raw_ne = &nat_blk->entries[nid - start_nid];
2013 raw_nat_from_node_info(raw_ne, &ne->ni);
2015 __clear_nat_cache_dirty(NM_I(sbi), ne);
2016 if (nat_get_blkaddr(ne) == NULL_ADDR)
2017 add_free_nid(sbi, nid, false);
2021 up_write(&curseg->journal_rwsem);
2023 f2fs_put_page(page, 1);
2025 f2fs_bug_on(sbi, set->entry_cnt);
2027 radix_tree_delete(&NM_I(sbi)->nat_set_root, set->set);
2028 kmem_cache_free(nat_entry_set_slab, set);
2032 * This function is called during the checkpointing process.
2034 void flush_nat_entries(struct f2fs_sb_info *sbi)
2036 struct f2fs_nm_info *nm_i = NM_I(sbi);
2037 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA);
2038 struct f2fs_journal *journal = curseg->journal;
2039 struct nat_entry_set *setvec[SETVEC_SIZE];
2040 struct nat_entry_set *set, *tmp;
2045 if (!nm_i->dirty_nat_cnt)
2048 down_write(&nm_i->nat_tree_lock);
2051 * if there are no enough space in journal to store dirty nat
2052 * entries, remove all entries from journal and merge them
2053 * into nat entry set.
2055 if (!__has_cursum_space(journal, nm_i->dirty_nat_cnt, NAT_JOURNAL))
2056 remove_nats_in_journal(sbi);
2058 while ((found = __gang_lookup_nat_set(nm_i,
2059 set_idx, SETVEC_SIZE, setvec))) {
2061 set_idx = setvec[found - 1]->set + 1;
2062 for (idx = 0; idx < found; idx++)
2063 __adjust_nat_entry_set(setvec[idx], &sets,
2064 MAX_NAT_JENTRIES(journal));
2067 /* flush dirty nats in nat entry set */
2068 list_for_each_entry_safe(set, tmp, &sets, set_list)
2069 __flush_nat_entry_set(sbi, set);
2071 up_write(&nm_i->nat_tree_lock);
2073 f2fs_bug_on(sbi, nm_i->dirty_nat_cnt);
2076 static int init_node_manager(struct f2fs_sb_info *sbi)
2078 struct f2fs_super_block *sb_raw = F2FS_RAW_SUPER(sbi);
2079 struct f2fs_nm_info *nm_i = NM_I(sbi);
2080 unsigned char *version_bitmap;
2081 unsigned int nat_segs, nat_blocks;
2083 nm_i->nat_blkaddr = le32_to_cpu(sb_raw->nat_blkaddr);
2085 /* segment_count_nat includes pair segment so divide to 2. */
2086 nat_segs = le32_to_cpu(sb_raw->segment_count_nat) >> 1;
2087 nat_blocks = nat_segs << le32_to_cpu(sb_raw->log_blocks_per_seg);
2089 nm_i->max_nid = NAT_ENTRY_PER_BLOCK * nat_blocks;
2091 /* not used nids: 0, node, meta, (and root counted as valid node) */
2092 nm_i->available_nids = nm_i->max_nid - F2FS_RESERVED_NODE_NUM;
2095 nm_i->ram_thresh = DEF_RAM_THRESHOLD;
2096 nm_i->ra_nid_pages = DEF_RA_NID_PAGES;
2097 nm_i->dirty_nats_ratio = DEF_DIRTY_NAT_RATIO_THRESHOLD;
2099 INIT_RADIX_TREE(&nm_i->free_nid_root, GFP_ATOMIC);
2100 INIT_LIST_HEAD(&nm_i->free_nid_list);
2101 INIT_RADIX_TREE(&nm_i->nat_root, GFP_NOIO);
2102 INIT_RADIX_TREE(&nm_i->nat_set_root, GFP_NOIO);
2103 INIT_LIST_HEAD(&nm_i->nat_entries);
2105 mutex_init(&nm_i->build_lock);
2106 spin_lock_init(&nm_i->free_nid_list_lock);
2107 init_rwsem(&nm_i->nat_tree_lock);
2109 nm_i->next_scan_nid = le32_to_cpu(sbi->ckpt->next_free_nid);
2110 nm_i->bitmap_size = __bitmap_size(sbi, NAT_BITMAP);
2111 version_bitmap = __bitmap_ptr(sbi, NAT_BITMAP);
2112 if (!version_bitmap)
2115 nm_i->nat_bitmap = kmemdup(version_bitmap, nm_i->bitmap_size,
2117 if (!nm_i->nat_bitmap)
2122 int build_node_manager(struct f2fs_sb_info *sbi)
2126 sbi->nm_info = kzalloc(sizeof(struct f2fs_nm_info), GFP_KERNEL);
2130 err = init_node_manager(sbi);
2134 build_free_nids(sbi);
2138 void destroy_node_manager(struct f2fs_sb_info *sbi)
2140 struct f2fs_nm_info *nm_i = NM_I(sbi);
2141 struct free_nid *i, *next_i;
2142 struct nat_entry *natvec[NATVEC_SIZE];
2143 struct nat_entry_set *setvec[SETVEC_SIZE];
2150 /* destroy free nid list */
2151 spin_lock(&nm_i->free_nid_list_lock);
2152 list_for_each_entry_safe(i, next_i, &nm_i->free_nid_list, list) {
2153 f2fs_bug_on(sbi, i->state == NID_ALLOC);
2154 __del_from_free_nid_list(nm_i, i);
2156 spin_unlock(&nm_i->free_nid_list_lock);
2157 kmem_cache_free(free_nid_slab, i);
2158 spin_lock(&nm_i->free_nid_list_lock);
2160 f2fs_bug_on(sbi, nm_i->fcnt);
2161 spin_unlock(&nm_i->free_nid_list_lock);
2163 /* destroy nat cache */
2164 down_write(&nm_i->nat_tree_lock);
2165 while ((found = __gang_lookup_nat_cache(nm_i,
2166 nid, NATVEC_SIZE, natvec))) {
2169 nid = nat_get_nid(natvec[found - 1]) + 1;
2170 for (idx = 0; idx < found; idx++)
2171 __del_from_nat_cache(nm_i, natvec[idx]);
2173 f2fs_bug_on(sbi, nm_i->nat_cnt);
2175 /* destroy nat set cache */
2177 while ((found = __gang_lookup_nat_set(nm_i,
2178 nid, SETVEC_SIZE, setvec))) {
2181 nid = setvec[found - 1]->set + 1;
2182 for (idx = 0; idx < found; idx++) {
2183 /* entry_cnt is not zero, when cp_error was occurred */
2184 f2fs_bug_on(sbi, !list_empty(&setvec[idx]->entry_list));
2185 radix_tree_delete(&nm_i->nat_set_root, setvec[idx]->set);
2186 kmem_cache_free(nat_entry_set_slab, setvec[idx]);
2189 up_write(&nm_i->nat_tree_lock);
2191 kfree(nm_i->nat_bitmap);
2192 sbi->nm_info = NULL;
2196 int __init create_node_manager_caches(void)
2198 nat_entry_slab = f2fs_kmem_cache_create("nat_entry",
2199 sizeof(struct nat_entry));
2200 if (!nat_entry_slab)
2203 free_nid_slab = f2fs_kmem_cache_create("free_nid",
2204 sizeof(struct free_nid));
2206 goto destroy_nat_entry;
2208 nat_entry_set_slab = f2fs_kmem_cache_create("nat_entry_set",
2209 sizeof(struct nat_entry_set));
2210 if (!nat_entry_set_slab)
2211 goto destroy_free_nid;
2215 kmem_cache_destroy(free_nid_slab);
2217 kmem_cache_destroy(nat_entry_slab);
2222 void destroy_node_manager_caches(void)
2224 kmem_cache_destroy(nat_entry_set_slab);
2225 kmem_cache_destroy(free_nid_slab);
2226 kmem_cache_destroy(nat_entry_slab);