blob: 118321bd1a7fa9a71694d288615d85b660f03d7e [file] [log] [blame]
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +09001/*
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09002 * fs/f2fs/node.c
3 *
4 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
5 * http://www.samsung.com/
6 *
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.
10 */
11#include <linux/fs.h>
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>
18
19#include "f2fs.h"
20#include "node.h"
21#include "segment.h"
Jaegeuk Kim9e4ded32014-12-17 19:58:58 -080022#include "trace.h"
Namjae Jeon51dd6242013-04-20 01:28:52 +090023#include <trace/events/f2fs.h>
Jaegeuk Kime05df3b2012-11-02 17:08:50 +090024
Gu Zhengf978f5a2014-02-21 18:08:29 +080025#define on_build_free_nids(nmi) mutex_is_locked(&nm_i->build_lock)
26
Jaegeuk Kime05df3b2012-11-02 17:08:50 +090027static struct kmem_cache *nat_entry_slab;
28static struct kmem_cache *free_nid_slab;
Chao Yuaec71382014-06-24 09:18:20 +080029static struct kmem_cache *nat_entry_set_slab;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +090030
Jaegeuk Kim6fb03f32014-04-16 10:47:06 +090031bool available_free_memory(struct f2fs_sb_info *sbi, int type)
Jaegeuk Kimcdfc41c2014-03-19 13:31:37 +090032{
Jaegeuk Kim6fb03f32014-04-16 10:47:06 +090033 struct f2fs_nm_info *nm_i = NM_I(sbi);
Jaegeuk Kimcdfc41c2014-03-19 13:31:37 +090034 struct sysinfo val;
Jaegeuk Kime5e7ea32014-11-06 15:24:46 -080035 unsigned long avail_ram;
Jaegeuk Kimcdfc41c2014-03-19 13:31:37 +090036 unsigned long mem_size = 0;
Jaegeuk Kim6fb03f32014-04-16 10:47:06 +090037 bool res = false;
Jaegeuk Kimcdfc41c2014-03-19 13:31:37 +090038
39 si_meminfo(&val);
Jaegeuk Kime5e7ea32014-11-06 15:24:46 -080040
41 /* only uses low memory */
42 avail_ram = val.totalram - val.totalhigh;
43
Chao Yu429511c2015-02-05 17:54:31 +080044 /*
45 * give 25%, 25%, 50%, 50%, 50% memory for each components respectively
46 */
Jaegeuk Kim6fb03f32014-04-16 10:47:06 +090047 if (type == FREE_NIDS) {
Jaegeuk Kime5e7ea32014-11-06 15:24:46 -080048 mem_size = (nm_i->fcnt * sizeof(struct free_nid)) >>
49 PAGE_CACHE_SHIFT;
50 res = mem_size < ((avail_ram * nm_i->ram_thresh / 100) >> 2);
Jaegeuk Kim6fb03f32014-04-16 10:47:06 +090051 } else if (type == NAT_ENTRIES) {
Jaegeuk Kime5e7ea32014-11-06 15:24:46 -080052 mem_size = (nm_i->nat_cnt * sizeof(struct nat_entry)) >>
53 PAGE_CACHE_SHIFT;
54 res = mem_size < ((avail_ram * nm_i->ram_thresh / 100) >> 2);
Jaegeuk Kima1257022015-10-08 10:40:07 -070055 } else if (type == DIRTY_DENTS) {
56 if (sbi->sb->s_bdi->wb.dirty_exceeded)
57 return false;
58 mem_size = get_pages(sbi, F2FS_DIRTY_DENTS);
59 res = mem_size < ((avail_ram * nm_i->ram_thresh / 100) >> 1);
Jaegeuk Kime5e7ea32014-11-06 15:24:46 -080060 } else if (type == INO_ENTRIES) {
61 int i;
62
Jaegeuk Kime5e7ea32014-11-06 15:24:46 -080063 for (i = 0; i <= UPDATE_INO; i++)
Chao Yu67298802014-11-18 11:18:36 +080064 mem_size += (sbi->im[i].ino_num *
65 sizeof(struct ino_entry)) >> PAGE_CACHE_SHIFT;
Jaegeuk Kime5e7ea32014-11-06 15:24:46 -080066 res = mem_size < ((avail_ram * nm_i->ram_thresh / 100) >> 1);
Chao Yu429511c2015-02-05 17:54:31 +080067 } else if (type == EXTENT_CACHE) {
Jaegeuk Kim7441cce2015-12-21 19:20:15 -080068 mem_size = (atomic_read(&sbi->total_ext_tree) *
69 sizeof(struct extent_tree) +
Chao Yu429511c2015-02-05 17:54:31 +080070 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);
Jaegeuk Kim1e843712014-12-09 06:08:59 -080073 } else {
Jaegeuk Kim1663cae2016-01-09 16:14:08 -080074 if (!sbi->sb->s_bdi->wb.dirty_exceeded)
75 return true;
Jaegeuk Kim6fb03f32014-04-16 10:47:06 +090076 }
77 return res;
Jaegeuk Kimcdfc41c2014-03-19 13:31:37 +090078}
79
Jaegeuk Kime05df3b2012-11-02 17:08:50 +090080static void clear_node_page_dirty(struct page *page)
81{
82 struct address_space *mapping = page->mapping;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +090083 unsigned int long flags;
84
85 if (PageDirty(page)) {
86 spin_lock_irqsave(&mapping->tree_lock, flags);
87 radix_tree_tag_clear(&mapping->page_tree,
88 page_index(page),
89 PAGECACHE_TAG_DIRTY);
90 spin_unlock_irqrestore(&mapping->tree_lock, flags);
91
92 clear_page_dirty_for_io(page);
Jaegeuk Kim40813632014-09-02 15:31:18 -070093 dec_page_count(F2FS_M_SB(mapping), F2FS_DIRTY_NODES);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +090094 }
95 ClearPageUptodate(page);
96}
97
98static struct page *get_current_nat_page(struct f2fs_sb_info *sbi, nid_t nid)
99{
100 pgoff_t index = current_nat_addr(sbi, nid);
101 return get_meta_page(sbi, index);
102}
103
104static struct page *get_next_nat_page(struct f2fs_sb_info *sbi, nid_t nid)
105{
106 struct page *src_page;
107 struct page *dst_page;
108 pgoff_t src_off;
109 pgoff_t dst_off;
110 void *src_addr;
111 void *dst_addr;
112 struct f2fs_nm_info *nm_i = NM_I(sbi);
113
114 src_off = current_nat_addr(sbi, nid);
115 dst_off = next_nat_addr(sbi, src_off);
116
117 /* get current nat block page with lock */
118 src_page = get_meta_page(sbi, src_off);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900119 dst_page = grab_meta_page(sbi, dst_off);
Jaegeuk Kim9850cf42014-09-02 15:52:58 -0700120 f2fs_bug_on(sbi, PageDirty(src_page));
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900121
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);
127
128 set_to_next_nat(nm_i, nid);
129
130 return dst_page;
131}
132
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900133static struct nat_entry *__lookup_nat_cache(struct f2fs_nm_info *nm_i, nid_t n)
134{
135 return radix_tree_lookup(&nm_i->nat_root, n);
136}
137
138static unsigned int __gang_lookup_nat_cache(struct f2fs_nm_info *nm_i,
139 nid_t start, unsigned int nr, struct nat_entry **ep)
140{
141 return radix_tree_gang_lookup(&nm_i->nat_root, (void **)ep, start, nr);
142}
143
144static void __del_from_nat_cache(struct f2fs_nm_info *nm_i, struct nat_entry *e)
145{
146 list_del(&e->list);
147 radix_tree_delete(&nm_i->nat_root, nat_get_nid(e));
148 nm_i->nat_cnt--;
149 kmem_cache_free(nat_entry_slab, e);
150}
151
Jaegeuk Kim309cc2b2014-09-22 11:40:48 -0700152static void __set_nat_cache_dirty(struct f2fs_nm_info *nm_i,
153 struct nat_entry *ne)
154{
155 nid_t set = NAT_BLOCK_OFFSET(ne->ni.nid);
156 struct nat_entry_set *head;
157
158 if (get_nat_flag(ne, IS_DIRTY))
159 return;
Jaegeuk Kim9be32d72014-12-05 10:39:49 -0800160
Jaegeuk Kim309cc2b2014-09-22 11:40:48 -0700161 head = radix_tree_lookup(&nm_i->nat_set_root, set);
162 if (!head) {
Jaegeuk Kim80c54502015-08-20 08:51:56 -0700163 head = f2fs_kmem_cache_alloc(nat_entry_set_slab, GFP_NOFS);
Jaegeuk Kim309cc2b2014-09-22 11:40:48 -0700164
165 INIT_LIST_HEAD(&head->entry_list);
166 INIT_LIST_HEAD(&head->set_list);
167 head->set = set;
168 head->entry_cnt = 0;
Jaegeuk Kim9be32d72014-12-05 10:39:49 -0800169 f2fs_radix_tree_insert(&nm_i->nat_set_root, set, head);
Jaegeuk Kim309cc2b2014-09-22 11:40:48 -0700170 }
171 list_move_tail(&ne->list, &head->entry_list);
172 nm_i->dirty_nat_cnt++;
173 head->entry_cnt++;
174 set_nat_flag(ne, IS_DIRTY, true);
175}
176
177static void __clear_nat_cache_dirty(struct f2fs_nm_info *nm_i,
178 struct nat_entry *ne)
179{
Changman Lee20d047c2014-11-25 12:44:23 +0900180 nid_t set = NAT_BLOCK_OFFSET(ne->ni.nid);
Jaegeuk Kim309cc2b2014-09-22 11:40:48 -0700181 struct nat_entry_set *head;
182
183 head = radix_tree_lookup(&nm_i->nat_set_root, set);
184 if (head) {
185 list_move_tail(&ne->list, &nm_i->nat_entries);
186 set_nat_flag(ne, IS_DIRTY, false);
187 head->entry_cnt--;
188 nm_i->dirty_nat_cnt--;
189 }
190}
191
192static unsigned int __gang_lookup_nat_set(struct f2fs_nm_info *nm_i,
193 nid_t start, unsigned int nr, struct nat_entry_set **ep)
194{
195 return radix_tree_gang_lookup(&nm_i->nat_set_root, (void **)ep,
196 start, nr);
197}
198
Jaegeuk Kim2dcf51a2015-04-29 18:31:19 -0700199int need_dentry_mark(struct f2fs_sb_info *sbi, nid_t nid)
200{
201 struct f2fs_nm_info *nm_i = NM_I(sbi);
202 struct nat_entry *e;
203 bool need = false;
204
205 down_read(&nm_i->nat_tree_lock);
206 e = __lookup_nat_cache(nm_i, nid);
207 if (e) {
208 if (!get_nat_flag(e, IS_CHECKPOINTED) &&
209 !get_nat_flag(e, HAS_FSYNCED_INODE))
210 need = true;
211 }
212 up_read(&nm_i->nat_tree_lock);
213 return need;
214}
215
Jaegeuk Kim88bd02c2014-09-15 14:50:48 -0700216bool is_checkpointed_node(struct f2fs_sb_info *sbi, nid_t nid)
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900217{
218 struct f2fs_nm_info *nm_i = NM_I(sbi);
219 struct nat_entry *e;
Jaegeuk Kim88bd02c2014-09-15 14:50:48 -0700220 bool is_cp = true;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900221
Jaegeuk Kim8b26ef92014-12-03 21:15:10 -0800222 down_read(&nm_i->nat_tree_lock);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900223 e = __lookup_nat_cache(nm_i, nid);
Jaegeuk Kim7ef35e32014-09-15 12:07:13 -0700224 if (e && !get_nat_flag(e, IS_CHECKPOINTED))
Jaegeuk Kim88bd02c2014-09-15 14:50:48 -0700225 is_cp = false;
Jaegeuk Kim8b26ef92014-12-03 21:15:10 -0800226 up_read(&nm_i->nat_tree_lock);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900227 return is_cp;
228}
229
Jaegeuk Kim88bd02c2014-09-15 14:50:48 -0700230bool need_inode_block_update(struct f2fs_sb_info *sbi, nid_t ino)
Jaegeuk Kimb6fe5872014-06-04 00:39:42 +0900231{
232 struct f2fs_nm_info *nm_i = NM_I(sbi);
233 struct nat_entry *e;
Jaegeuk Kim88bd02c2014-09-15 14:50:48 -0700234 bool need_update = true;
Jaegeuk Kimb6fe5872014-06-04 00:39:42 +0900235
Jaegeuk Kim8b26ef92014-12-03 21:15:10 -0800236 down_read(&nm_i->nat_tree_lock);
Jaegeuk Kim88bd02c2014-09-15 14:50:48 -0700237 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)))
241 need_update = false;
Jaegeuk Kim8b26ef92014-12-03 21:15:10 -0800242 up_read(&nm_i->nat_tree_lock);
Jaegeuk Kim88bd02c2014-09-15 14:50:48 -0700243 return need_update;
Jaegeuk Kimb6fe5872014-06-04 00:39:42 +0900244}
245
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900246static struct nat_entry *grab_nat_entry(struct f2fs_nm_info *nm_i, nid_t nid)
247{
248 struct nat_entry *new;
249
Jaegeuk Kim80c54502015-08-20 08:51:56 -0700250 new = f2fs_kmem_cache_alloc(nat_entry_slab, GFP_NOFS);
Jaegeuk Kim9be32d72014-12-05 10:39:49 -0800251 f2fs_radix_tree_insert(&nm_i->nat_root, nid, new);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900252 memset(new, 0, sizeof(struct nat_entry));
253 nat_set_nid(new, nid);
Jaegeuk Kim88bd02c2014-09-15 14:50:48 -0700254 nat_reset_flag(new);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900255 list_add_tail(&new->list, &nm_i->nat_entries);
256 nm_i->nat_cnt++;
257 return new;
258}
259
Chao Yu1515aef2016-02-19 18:12:28 +0800260static void cache_nat_entry(struct f2fs_sb_info *sbi, nid_t nid,
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900261 struct f2fs_nat_entry *ne)
262{
Chao Yu1515aef2016-02-19 18:12:28 +0800263 struct f2fs_nm_info *nm_i = NM_I(sbi);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900264 struct nat_entry *e;
Jaegeuk Kim9be32d72014-12-05 10:39:49 -0800265
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900266 e = __lookup_nat_cache(nm_i, nid);
267 if (!e) {
268 e = grab_nat_entry(nm_i, nid);
Chao Yu94dac222014-04-17 10:51:05 +0800269 node_info_from_raw_nat(&e->ni, ne);
Chao Yu1515aef2016-02-19 18:12:28 +0800270 } else {
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);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900274 }
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900275}
276
277static void set_node_addr(struct f2fs_sb_info *sbi, struct node_info *ni,
Jaegeuk Kim479f40c2014-03-20 21:52:53 +0900278 block_t new_blkaddr, bool fsync_done)
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900279{
280 struct f2fs_nm_info *nm_i = NM_I(sbi);
281 struct nat_entry *e;
Jaegeuk Kim9be32d72014-12-05 10:39:49 -0800282
Jaegeuk Kim8b26ef92014-12-03 21:15:10 -0800283 down_write(&nm_i->nat_tree_lock);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900284 e = __lookup_nat_cache(nm_i, ni->nid);
285 if (!e) {
286 e = grab_nat_entry(nm_i, ni->nid);
Chao Yu5c27f4e2014-12-18 17:37:21 +0800287 copy_node_info(&e->ni, ni);
Jaegeuk Kim9850cf42014-09-02 15:52:58 -0700288 f2fs_bug_on(sbi, ni->blk_addr == NEW_ADDR);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900289 } else if (new_blkaddr == NEW_ADDR) {
290 /*
291 * when nid is reallocated,
292 * previous nat entry can be remained in nat cache.
293 * So, reinitialize it with new information.
294 */
Chao Yu5c27f4e2014-12-18 17:37:21 +0800295 copy_node_info(&e->ni, ni);
Jaegeuk Kim9850cf42014-09-02 15:52:58 -0700296 f2fs_bug_on(sbi, ni->blk_addr != NULL_ADDR);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900297 }
298
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900299 /* sanity check */
Jaegeuk Kim9850cf42014-09-02 15:52:58 -0700300 f2fs_bug_on(sbi, nat_get_blkaddr(e) != ni->blk_addr);
301 f2fs_bug_on(sbi, nat_get_blkaddr(e) == NULL_ADDR &&
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900302 new_blkaddr == NULL_ADDR);
Jaegeuk Kim9850cf42014-09-02 15:52:58 -0700303 f2fs_bug_on(sbi, nat_get_blkaddr(e) == NEW_ADDR &&
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900304 new_blkaddr == NEW_ADDR);
Jaegeuk Kim9850cf42014-09-02 15:52:58 -0700305 f2fs_bug_on(sbi, nat_get_blkaddr(e) != NEW_ADDR &&
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900306 nat_get_blkaddr(e) != NULL_ADDR &&
307 new_blkaddr == NEW_ADDR);
308
arter97e1c42042014-08-06 23:22:50 +0900309 /* increment version no as node is removed */
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900310 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));
Jaegeuk Kim26834462015-08-14 17:57:29 -0700313
314 /* in order to reuse the nid */
315 if (nm_i->next_scan_nid > ni->nid)
316 nm_i->next_scan_nid = ni->nid;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900317 }
318
319 /* change address */
320 nat_set_blkaddr(e, new_blkaddr);
Jaegeuk Kim88bd02c2014-09-15 14:50:48 -0700321 if (new_blkaddr == NEW_ADDR || new_blkaddr == NULL_ADDR)
322 set_nat_flag(e, IS_CHECKPOINTED, false);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900323 __set_nat_cache_dirty(nm_i, e);
Jaegeuk Kim479f40c2014-03-20 21:52:53 +0900324
325 /* update fsync_mark if its inode nat entry is still alive */
Chao Yud5b692b2015-04-30 18:35:50 +0800326 if (ni->nid != ni->ino)
327 e = __lookup_nat_cache(nm_i, ni->ino);
Jaegeuk Kim88bd02c2014-09-15 14:50:48 -0700328 if (e) {
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);
332 }
Jaegeuk Kim8b26ef92014-12-03 21:15:10 -0800333 up_write(&nm_i->nat_tree_lock);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900334}
335
Jaegeuk Kim4660f9c2013-10-24 14:19:18 +0900336int try_to_free_nats(struct f2fs_sb_info *sbi, int nr_shrink)
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900337{
338 struct f2fs_nm_info *nm_i = NM_I(sbi);
Jaegeuk Kim1b38dc82015-06-19 15:36:07 -0700339 int nr = nr_shrink;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900340
Jaegeuk Kim1b38dc82015-06-19 15:36:07 -0700341 if (!down_write_trylock(&nm_i->nat_tree_lock))
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900342 return 0;
343
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900344 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);
349 nr_shrink--;
350 }
Jaegeuk Kim8b26ef92014-12-03 21:15:10 -0800351 up_write(&nm_i->nat_tree_lock);
Jaegeuk Kim1b38dc82015-06-19 15:36:07 -0700352 return nr - nr_shrink;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900353}
354
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +0900355/*
arter97e1c42042014-08-06 23:22:50 +0900356 * This function always returns success
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900357 */
358void get_node_info(struct f2fs_sb_info *sbi, nid_t nid, struct node_info *ni)
359{
360 struct f2fs_nm_info *nm_i = NM_I(sbi);
361 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA);
Chao Yub7ad7512016-02-19 18:08:46 +0800362 struct f2fs_journal *journal = curseg->journal;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900363 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;
367 struct nat_entry *e;
368 int i;
369
370 ni->nid = nid;
371
372 /* Check nat cache */
Jaegeuk Kim8b26ef92014-12-03 21:15:10 -0800373 down_read(&nm_i->nat_tree_lock);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900374 e = __lookup_nat_cache(nm_i, nid);
375 if (e) {
376 ni->ino = nat_get_ino(e);
377 ni->blk_addr = nat_get_blkaddr(e);
378 ni->version = nat_get_version(e);
Chao Yu1515aef2016-02-19 18:12:28 +0800379 up_read(&nm_i->nat_tree_lock);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900380 return;
Chao Yu1515aef2016-02-19 18:12:28 +0800381 }
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900382
Jaegeuk Kim3547ea92014-12-30 23:08:26 -0800383 memset(&ne, 0, sizeof(struct f2fs_nat_entry));
384
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900385 /* Check current segment summary */
Chao Yub7ad7512016-02-19 18:08:46 +0800386 down_read(&curseg->journal_rwsem);
Chao Yudfc08a12016-02-14 18:50:40 +0800387 i = lookup_journal_in_cursum(journal, NAT_JOURNAL, nid, 0);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900388 if (i >= 0) {
Chao Yudfc08a12016-02-14 18:50:40 +0800389 ne = nat_in_journal(journal, i);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900390 node_info_from_raw_nat(ni, &ne);
391 }
Chao Yub7ad7512016-02-19 18:08:46 +0800392 up_read(&curseg->journal_rwsem);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900393 if (i >= 0)
394 goto cache;
395
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);
402cache:
Chao Yu1515aef2016-02-19 18:12:28 +0800403 up_read(&nm_i->nat_tree_lock);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900404 /* cache nat entry */
Chao Yu1515aef2016-02-19 18:12:28 +0800405 down_write(&nm_i->nat_tree_lock);
406 cache_nat_entry(sbi, nid, &ne);
Jaegeuk Kima5131192016-01-02 09:19:41 -0800407 up_write(&nm_i->nat_tree_lock);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900408}
409
Chao Yu3cf45742016-01-26 15:40:44 +0800410pgoff_t get_next_page_offset(struct dnode_of_data *dn, pgoff_t pgofs)
411{
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;
418 pgoff_t base = 0;
419
420 if (!dn->max_level)
421 return pgofs + 1;
422
423 while (max_level-- > cur_level)
424 skipped_unit *= NIDS_PER_BLOCK;
425
426 switch (dn->max_level) {
427 case 3:
428 base += 2 * indirect_blks;
429 case 2:
430 base += 2 * direct_blks;
431 case 1:
432 base += direct_index;
433 break;
434 default:
435 f2fs_bug_on(F2FS_I_SB(dn->inode), 1);
436 }
437
438 return ((pgofs - base) / skipped_unit + 1) * skipped_unit + base;
439}
440
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +0900441/*
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900442 * The maximum depth is four.
443 * Offset[0] will have raw inode offset.
444 */
Chao Yu81ca7352016-01-26 15:39:35 +0800445static int get_node_path(struct inode *inode, long block,
Jaegeuk Kimde936532013-08-12 21:08:03 +0900446 int offset[4], unsigned int noffset[4])
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900447{
Chao Yu81ca7352016-01-26 15:39:35 +0800448 const long direct_index = ADDRS_PER_INODE(inode);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900449 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;
453 int n = 0;
454 int level = 0;
455
456 noffset[0] = 0;
457
458 if (block < direct_index) {
Namjae Jeon25c0a6e2013-03-02 12:41:31 +0900459 offset[n] = block;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900460 goto got;
461 }
462 block -= direct_index;
463 if (block < direct_blks) {
464 offset[n++] = NODE_DIR1_BLOCK;
465 noffset[n] = 1;
Namjae Jeon25c0a6e2013-03-02 12:41:31 +0900466 offset[n] = block;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900467 level = 1;
468 goto got;
469 }
470 block -= direct_blks;
471 if (block < direct_blks) {
472 offset[n++] = NODE_DIR2_BLOCK;
473 noffset[n] = 2;
Namjae Jeon25c0a6e2013-03-02 12:41:31 +0900474 offset[n] = block;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900475 level = 1;
476 goto got;
477 }
478 block -= direct_blks;
479 if (block < indirect_blks) {
480 offset[n++] = NODE_IND1_BLOCK;
481 noffset[n] = 3;
482 offset[n++] = block / direct_blks;
483 noffset[n] = 4 + offset[n - 1];
Namjae Jeon25c0a6e2013-03-02 12:41:31 +0900484 offset[n] = block % direct_blks;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900485 level = 2;
486 goto got;
487 }
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];
Namjae Jeon25c0a6e2013-03-02 12:41:31 +0900494 offset[n] = block % direct_blks;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900495 level = 2;
496 goto got;
497 }
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) +
508 offset[n - 1];
Namjae Jeon25c0a6e2013-03-02 12:41:31 +0900509 offset[n] = block % direct_blks;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900510 level = 3;
511 goto got;
512 } else {
513 BUG();
514 }
515got:
516 return level;
517}
518
519/*
520 * Caller should call f2fs_put_dnode(dn).
Chao Yu4f4124d2013-12-21 18:02:14 +0800521 * 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.
Jaegeuk Kim39936832012-11-22 16:21:29 +0900523 * In the case of RDONLY_NODE, we don't need to care about mutex.
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900524 */
Jaegeuk Kim266e97a2013-02-26 13:10:46 +0900525int get_dnode_of_data(struct dnode_of_data *dn, pgoff_t index, int mode)
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900526{
Jaegeuk Kim40813632014-09-02 15:31:18 -0700527 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900528 struct page *npage[4];
Jaegeuk Kimf1a3b982015-02-11 11:25:11 -0800529 struct page *parent = NULL;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900530 int offset[4];
531 unsigned int noffset[4];
532 nid_t nids[4];
Chao Yu3cf45742016-01-26 15:40:44 +0800533 int level, i = 0;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900534 int err = 0;
535
Chao Yu81ca7352016-01-26 15:39:35 +0800536 level = get_node_path(dn->inode, index, offset, noffset);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900537
538 nids[0] = dn->inode->i_ino;
Jaegeuk Kim1646cfa2013-05-20 09:42:28 +0900539 npage[0] = dn->inode_page;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900540
Jaegeuk Kim1646cfa2013-05-20 09:42:28 +0900541 if (!npage[0]) {
542 npage[0] = get_node_page(sbi, nids[0]);
543 if (IS_ERR(npage[0]))
544 return PTR_ERR(npage[0]);
545 }
Jaegeuk Kimf1a3b982015-02-11 11:25:11 -0800546
547 /* if inline_data is set, should not report any block indices */
548 if (f2fs_has_inline_data(dn->inode) && index) {
Jaegeuk Kim76629162015-03-02 16:28:16 -0800549 err = -ENOENT;
Jaegeuk Kimf1a3b982015-02-11 11:25:11 -0800550 f2fs_put_page(npage[0], 1);
551 goto release_out;
552 }
553
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900554 parent = npage[0];
Changman Lee52c2db32013-02-20 07:47:06 +0900555 if (level != 0)
556 nids[1] = get_nid(parent, offset[0], true);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900557 dn->inode_page = npage[0];
558 dn->inode_page_locked = true;
559
560 /* get indirect or direct nodes */
561 for (i = 1; i <= level; i++) {
562 bool done = false;
563
Jaegeuk Kim266e97a2013-02-26 13:10:46 +0900564 if (!nids[i] && mode == ALLOC_NODE) {
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900565 /* alloc new node */
566 if (!alloc_nid(sbi, &(nids[i]))) {
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900567 err = -ENOSPC;
568 goto release_pages;
569 }
570
571 dn->nid = nids[i];
Jaegeuk Kim8ae8f162013-06-03 19:46:19 +0900572 npage[i] = new_node_page(dn, noffset[i], NULL);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900573 if (IS_ERR(npage[i])) {
574 alloc_nid_failed(sbi, nids[i]);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900575 err = PTR_ERR(npage[i]);
576 goto release_pages;
577 }
578
579 set_nid(parent, offset[i - 1], nids[i], i == 1);
580 alloc_nid_done(sbi, nids[i]);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900581 done = true;
Jaegeuk Kim266e97a2013-02-26 13:10:46 +0900582 } else if (mode == LOOKUP_NODE_RA && i == level && level > 1) {
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900583 npage[i] = get_node_page_ra(parent, offset[i - 1]);
584 if (IS_ERR(npage[i])) {
585 err = PTR_ERR(npage[i]);
586 goto release_pages;
587 }
588 done = true;
589 }
590 if (i == 1) {
591 dn->inode_page_locked = false;
592 unlock_page(parent);
593 } else {
594 f2fs_put_page(parent, 1);
595 }
596
597 if (!done) {
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);
602 goto release_out;
603 }
604 }
605 if (i < level) {
606 parent = npage[i];
607 nids[i + 1] = get_nid(parent, offset[i], false);
608 }
609 }
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);
614 return 0;
615
616release_pages:
617 f2fs_put_page(parent, 1);
618 if (i > 1)
619 f2fs_put_page(npage[0], 0);
620release_out:
621 dn->inode_page = NULL;
622 dn->node_page = NULL;
Chao Yu3cf45742016-01-26 15:40:44 +0800623 if (err == -ENOENT) {
624 dn->cur_level = i;
625 dn->max_level = level;
626 }
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900627 return err;
628}
629
630static void truncate_node(struct dnode_of_data *dn)
631{
Jaegeuk Kim40813632014-09-02 15:31:18 -0700632 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900633 struct node_info ni;
634
635 get_node_info(sbi, dn->nid, &ni);
Jaegeuk Kim71e9fec2012-12-20 15:10:06 +0900636 if (dn->inode->i_blocks == 0) {
Jaegeuk Kim9850cf42014-09-02 15:52:58 -0700637 f2fs_bug_on(sbi, ni.blk_addr != NULL_ADDR);
Jaegeuk Kim71e9fec2012-12-20 15:10:06 +0900638 goto invalidate;
639 }
Jaegeuk Kim9850cf42014-09-02 15:52:58 -0700640 f2fs_bug_on(sbi, ni.blk_addr == NULL_ADDR);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900641
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900642 /* Deallocate node address */
Jaegeuk Kim71e9fec2012-12-20 15:10:06 +0900643 invalidate_blocks(sbi, ni.blk_addr);
Gu Zhengef86d702013-11-19 18:03:38 +0800644 dec_valid_node_count(sbi, dn->inode);
Jaegeuk Kim479f40c2014-03-20 21:52:53 +0900645 set_node_addr(sbi, &ni, NULL_ADDR, false);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900646
647 if (dn->nid == dn->inode->i_ino) {
648 remove_orphan_inode(sbi, dn->nid);
649 dec_valid_inode_count(sbi);
650 } else {
651 sync_inode_page(dn);
652 }
Jaegeuk Kim71e9fec2012-12-20 15:10:06 +0900653invalidate:
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900654 clear_node_page_dirty(dn->node_page);
Chao Yucaf00472015-01-28 17:48:42 +0800655 set_sbi_flag(sbi, SBI_IS_DIRTY);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900656
657 f2fs_put_page(dn->node_page, 1);
Jaegeuk Kimbf39c002014-01-22 20:41:57 +0900658
659 invalidate_mapping_pages(NODE_MAPPING(sbi),
660 dn->node_page->index, dn->node_page->index);
661
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900662 dn->node_page = NULL;
Namjae Jeon51dd6242013-04-20 01:28:52 +0900663 trace_f2fs_truncate_node(dn->inode, dn->nid, ni.blk_addr);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900664}
665
666static int truncate_dnode(struct dnode_of_data *dn)
667{
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900668 struct page *page;
669
670 if (dn->nid == 0)
671 return 1;
672
673 /* get direct node */
Jaegeuk Kim40813632014-09-02 15:31:18 -0700674 page = get_node_page(F2FS_I_SB(dn->inode), dn->nid);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900675 if (IS_ERR(page) && PTR_ERR(page) == -ENOENT)
676 return 1;
677 else if (IS_ERR(page))
678 return PTR_ERR(page);
679
680 /* Make dnode_of_data for parameter */
681 dn->node_page = page;
682 dn->ofs_in_node = 0;
683 truncate_data_blocks(dn);
684 truncate_node(dn);
685 return 1;
686}
687
688static int truncate_nodes(struct dnode_of_data *dn, unsigned int nofs,
689 int ofs, int depth)
690{
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900691 struct dnode_of_data rdn = *dn;
692 struct page *page;
693 struct f2fs_node *rn;
694 nid_t child_nid;
695 unsigned int child_nofs;
696 int freed = 0;
697 int i, ret;
698
699 if (dn->nid == 0)
700 return NIDS_PER_BLOCK + 1;
701
Namjae Jeon51dd6242013-04-20 01:28:52 +0900702 trace_f2fs_truncate_nodes_enter(dn->inode, dn->nid, dn->data_blkaddr);
703
Jaegeuk Kim40813632014-09-02 15:31:18 -0700704 page = get_node_page(F2FS_I_SB(dn->inode), dn->nid);
Namjae Jeon51dd6242013-04-20 01:28:52 +0900705 if (IS_ERR(page)) {
706 trace_f2fs_truncate_nodes_exit(dn->inode, PTR_ERR(page));
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900707 return PTR_ERR(page);
Namjae Jeon51dd6242013-04-20 01:28:52 +0900708 }
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900709
Gu Zheng45590712013-07-15 17:57:38 +0800710 rn = F2FS_NODE(page);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900711 if (depth < 3) {
712 for (i = ofs; i < NIDS_PER_BLOCK; i++, freed++) {
713 child_nid = le32_to_cpu(rn->in.nid[i]);
714 if (child_nid == 0)
715 continue;
716 rdn.nid = child_nid;
717 ret = truncate_dnode(&rdn);
718 if (ret < 0)
719 goto out_err;
Jaegeuk Kim12719ae2016-01-07 13:23:12 -0800720 if (set_nid(page, i, 0, false))
721 dn->node_changed = true;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900722 }
723 } else {
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;
729 continue;
730 }
731 rdn.nid = child_nid;
732 ret = truncate_nodes(&rdn, child_nofs, 0, depth - 1);
733 if (ret == (NIDS_PER_BLOCK + 1)) {
Jaegeuk Kim12719ae2016-01-07 13:23:12 -0800734 if (set_nid(page, i, 0, false))
735 dn->node_changed = true;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900736 child_nofs += ret;
737 } else if (ret < 0 && ret != -ENOENT) {
738 goto out_err;
739 }
740 }
741 freed = child_nofs;
742 }
743
744 if (!ofs) {
745 /* remove current indirect node */
746 dn->node_page = page;
747 truncate_node(dn);
748 freed++;
749 } else {
750 f2fs_put_page(page, 1);
751 }
Namjae Jeon51dd6242013-04-20 01:28:52 +0900752 trace_f2fs_truncate_nodes_exit(dn->inode, freed);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900753 return freed;
754
755out_err:
756 f2fs_put_page(page, 1);
Namjae Jeon51dd6242013-04-20 01:28:52 +0900757 trace_f2fs_truncate_nodes_exit(dn->inode, ret);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900758 return ret;
759}
760
761static int truncate_partial_nodes(struct dnode_of_data *dn,
762 struct f2fs_inode *ri, int *offset, int depth)
763{
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900764 struct page *pages[2];
765 nid_t nid[3];
766 nid_t child_nid;
767 int err = 0;
768 int i;
769 int idx = depth - 2;
770
771 nid[0] = le32_to_cpu(ri->i_nid[offset[0] - NODE_DIR1_BLOCK]);
772 if (!nid[0])
773 return 0;
774
775 /* get indirect nodes in the path */
shifei10.gea225dca2013-10-29 15:32:34 +0800776 for (i = 0; i < idx + 1; i++) {
arter97e1c42042014-08-06 23:22:50 +0900777 /* reference count'll be increased */
Jaegeuk Kim40813632014-09-02 15:31:18 -0700778 pages[i] = get_node_page(F2FS_I_SB(dn->inode), nid[i]);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900779 if (IS_ERR(pages[i])) {
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900780 err = PTR_ERR(pages[i]);
shifei10.gea225dca2013-10-29 15:32:34 +0800781 idx = i - 1;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900782 goto fail;
783 }
784 nid[i + 1] = get_nid(pages[i], offset[i + 1], false);
785 }
786
787 /* free direct nodes linked to a partial indirect node */
shifei10.gea225dca2013-10-29 15:32:34 +0800788 for (i = offset[idx + 1]; i < NIDS_PER_BLOCK; i++) {
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900789 child_nid = get_nid(pages[idx], i, false);
790 if (!child_nid)
791 continue;
792 dn->nid = child_nid;
793 err = truncate_dnode(dn);
794 if (err < 0)
795 goto fail;
Jaegeuk Kim12719ae2016-01-07 13:23:12 -0800796 if (set_nid(pages[idx], i, 0, false))
797 dn->node_changed = true;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900798 }
799
shifei10.gea225dca2013-10-29 15:32:34 +0800800 if (offset[idx + 1] == 0) {
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900801 dn->node_page = pages[idx];
802 dn->nid = nid[idx];
803 truncate_node(dn);
804 } else {
805 f2fs_put_page(pages[idx], 1);
806 }
807 offset[idx]++;
shifei10.gea225dca2013-10-29 15:32:34 +0800808 offset[idx + 1] = 0;
809 idx--;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900810fail:
shifei10.gea225dca2013-10-29 15:32:34 +0800811 for (i = idx; i >= 0; i--)
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900812 f2fs_put_page(pages[i], 1);
Namjae Jeon51dd6242013-04-20 01:28:52 +0900813
814 trace_f2fs_truncate_partial_nodes(dn->inode, nid, depth, err);
815
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900816 return err;
817}
818
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +0900819/*
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900820 * All the block addresses of data and nodes should be nullified.
821 */
822int truncate_inode_blocks(struct inode *inode, pgoff_t from)
823{
Jaegeuk Kim40813632014-09-02 15:31:18 -0700824 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900825 int err = 0, cont = 1;
826 int level, offset[4], noffset[4];
Jaegeuk Kim7dd690c2013-02-12 07:28:55 +0900827 unsigned int nofs = 0;
Jaegeuk Kim58bfaf42013-12-26 16:30:41 +0900828 struct f2fs_inode *ri;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900829 struct dnode_of_data dn;
830 struct page *page;
831
Namjae Jeon51dd6242013-04-20 01:28:52 +0900832 trace_f2fs_truncate_inode_blocks_enter(inode, from);
833
Chao Yu81ca7352016-01-26 15:39:35 +0800834 level = get_node_path(inode, from, offset, noffset);
Jaegeuk Kimafcb7ca02013-04-26 11:55:17 +0900835restart:
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900836 page = get_node_page(sbi, inode->i_ino);
Namjae Jeon51dd6242013-04-20 01:28:52 +0900837 if (IS_ERR(page)) {
838 trace_f2fs_truncate_inode_blocks_exit(inode, PTR_ERR(page));
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900839 return PTR_ERR(page);
Namjae Jeon51dd6242013-04-20 01:28:52 +0900840 }
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900841
842 set_new_dnode(&dn, inode, page, NULL, 0);
843 unlock_page(page);
844
Jaegeuk Kim58bfaf42013-12-26 16:30:41 +0900845 ri = F2FS_INODE(page);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900846 switch (level) {
847 case 0:
848 case 1:
849 nofs = noffset[1];
850 break;
851 case 2:
852 nofs = noffset[1];
853 if (!offset[level - 1])
854 goto skip_partial;
Jaegeuk Kim58bfaf42013-12-26 16:30:41 +0900855 err = truncate_partial_nodes(&dn, ri, offset, level);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900856 if (err < 0 && err != -ENOENT)
857 goto fail;
858 nofs += 1 + NIDS_PER_BLOCK;
859 break;
860 case 3:
861 nofs = 5 + 2 * NIDS_PER_BLOCK;
862 if (!offset[level - 1])
863 goto skip_partial;
Jaegeuk Kim58bfaf42013-12-26 16:30:41 +0900864 err = truncate_partial_nodes(&dn, ri, offset, level);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900865 if (err < 0 && err != -ENOENT)
866 goto fail;
867 break;
868 default:
869 BUG();
870 }
871
872skip_partial:
873 while (cont) {
Jaegeuk Kim58bfaf42013-12-26 16:30:41 +0900874 dn.nid = le32_to_cpu(ri->i_nid[offset[0] - NODE_DIR1_BLOCK]);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900875 switch (offset[0]) {
876 case NODE_DIR1_BLOCK:
877 case NODE_DIR2_BLOCK:
878 err = truncate_dnode(&dn);
879 break;
880
881 case NODE_IND1_BLOCK:
882 case NODE_IND2_BLOCK:
883 err = truncate_nodes(&dn, nofs, offset[1], 2);
884 break;
885
886 case NODE_DIND_BLOCK:
887 err = truncate_nodes(&dn, nofs, offset[1], 3);
888 cont = 0;
889 break;
890
891 default:
892 BUG();
893 }
894 if (err < 0 && err != -ENOENT)
895 goto fail;
896 if (offset[1] == 0 &&
Jaegeuk Kim58bfaf42013-12-26 16:30:41 +0900897 ri->i_nid[offset[0] - NODE_DIR1_BLOCK]) {
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900898 lock_page(page);
Jaegeuk Kim4ef51a82014-01-21 18:51:16 +0900899 if (unlikely(page->mapping != NODE_MAPPING(sbi))) {
Jaegeuk Kimafcb7ca02013-04-26 11:55:17 +0900900 f2fs_put_page(page, 1);
901 goto restart;
902 }
Jaegeuk Kimfec1d652016-01-20 23:43:51 +0800903 f2fs_wait_on_page_writeback(page, NODE, true);
Jaegeuk Kim58bfaf42013-12-26 16:30:41 +0900904 ri->i_nid[offset[0] - NODE_DIR1_BLOCK] = 0;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900905 set_page_dirty(page);
906 unlock_page(page);
907 }
908 offset[1] = 0;
909 offset[0]++;
910 nofs += err;
911 }
912fail:
913 f2fs_put_page(page, 0);
Namjae Jeon51dd6242013-04-20 01:28:52 +0900914 trace_f2fs_truncate_inode_blocks_exit(inode, err);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900915 return err > 0 ? 0 : err;
916}
917
Jaegeuk Kim4f16fb02013-08-14 20:40:06 +0900918int truncate_xattr_node(struct inode *inode, struct page *page)
919{
Jaegeuk Kim40813632014-09-02 15:31:18 -0700920 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
Jaegeuk Kim4f16fb02013-08-14 20:40:06 +0900921 nid_t nid = F2FS_I(inode)->i_xattr_nid;
922 struct dnode_of_data dn;
923 struct page *npage;
924
925 if (!nid)
926 return 0;
927
928 npage = get_node_page(sbi, nid);
929 if (IS_ERR(npage))
930 return PTR_ERR(npage);
931
932 F2FS_I(inode)->i_xattr_nid = 0;
Jaegeuk Kim65985d92013-08-14 21:57:27 +0900933
934 /* need to do checkpoint during fsync */
935 F2FS_I(inode)->xattr_ver = cur_cp_version(F2FS_CKPT(sbi));
936
Jaegeuk Kim4f16fb02013-08-14 20:40:06 +0900937 set_new_dnode(&dn, inode, page, npage, nid);
938
939 if (page)
Chao Yu01d2d1a2013-11-28 15:43:07 +0800940 dn.inode_page_locked = true;
Jaegeuk Kim4f16fb02013-08-14 20:40:06 +0900941 truncate_node(&dn);
942 return 0;
943}
944
Jaegeuk Kim39936832012-11-22 16:21:29 +0900945/*
Chao Yu4f4124d2013-12-21 18:02:14 +0800946 * Caller should grab and release a rwsem by calling f2fs_lock_op() and
947 * f2fs_unlock_op().
Jaegeuk Kim39936832012-11-22 16:21:29 +0900948 */
Chao Yu13ec7292015-08-24 17:40:45 +0800949int remove_inode_page(struct inode *inode)
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900950{
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900951 struct dnode_of_data dn;
Chao Yu13ec7292015-08-24 17:40:45 +0800952 int err;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900953
Jaegeuk Kimc2e69582014-08-25 14:45:59 -0700954 set_new_dnode(&dn, inode, NULL, NULL, inode->i_ino);
Chao Yu13ec7292015-08-24 17:40:45 +0800955 err = get_dnode_of_data(&dn, 0, LOOKUP_NODE);
956 if (err)
957 return err;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900958
Chao Yu13ec7292015-08-24 17:40:45 +0800959 err = truncate_xattr_node(inode, dn.inode_page);
960 if (err) {
Jaegeuk Kimc2e69582014-08-25 14:45:59 -0700961 f2fs_put_dnode(&dn);
Chao Yu13ec7292015-08-24 17:40:45 +0800962 return err;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900963 }
Jaegeuk Kimc2e69582014-08-25 14:45:59 -0700964
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);
969
arter97e1c42042014-08-06 23:22:50 +0900970 /* 0 is possible, after f2fs_new_inode() has failed */
Jaegeuk Kim9850cf42014-09-02 15:52:58 -0700971 f2fs_bug_on(F2FS_I_SB(inode),
972 inode->i_blocks != 0 && inode->i_blocks != 1);
Jaegeuk Kimc2e69582014-08-25 14:45:59 -0700973
974 /* will put inode & node pages */
Jaegeuk Kim71e9fec2012-12-20 15:10:06 +0900975 truncate_node(&dn);
Chao Yu13ec7292015-08-24 17:40:45 +0800976 return 0;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900977}
978
Jaegeuk Kima014e032014-06-20 21:44:02 -0700979struct page *new_inode_page(struct inode *inode)
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900980{
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900981 struct dnode_of_data dn;
982
983 /* allocate inode page for new inode */
984 set_new_dnode(&dn, inode, NULL, NULL, inode->i_ino);
Jaegeuk Kim44a83ff2013-05-20 10:10:29 +0900985
986 /* caller should f2fs_put_page(page, 1); */
Jaegeuk Kim8ae8f162013-06-03 19:46:19 +0900987 return new_node_page(&dn, 0, NULL);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900988}
989
Jaegeuk Kim8ae8f162013-06-03 19:46:19 +0900990struct page *new_node_page(struct dnode_of_data *dn,
991 unsigned int ofs, struct page *ipage)
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900992{
Jaegeuk Kim40813632014-09-02 15:31:18 -0700993 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900994 struct node_info old_ni, new_ni;
995 struct page *page;
996 int err;
997
Jaegeuk Kim6bacf522013-12-06 15:00:58 +0900998 if (unlikely(is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC)))
Jaegeuk Kime05df3b2012-11-02 17:08:50 +0900999 return ERR_PTR(-EPERM);
1000
Jaegeuk Kim54b591d2014-04-29 17:28:32 +09001001 page = grab_cache_page(NODE_MAPPING(sbi), dn->nid);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001002 if (!page)
1003 return ERR_PTR(-ENOMEM);
1004
Jaegeuk Kim6bacf522013-12-06 15:00:58 +09001005 if (unlikely(!inc_valid_node_count(sbi, dn->inode))) {
Jaegeuk Kim9c027402013-08-12 16:00:46 +09001006 err = -ENOSPC;
1007 goto fail;
1008 }
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001009
Jaegeuk Kim9c027402013-08-12 16:00:46 +09001010 get_node_info(sbi, dn->nid, &old_ni);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001011
1012 /* Reinitialize old_ni with new node page */
Jaegeuk Kim9850cf42014-09-02 15:52:58 -07001013 f2fs_bug_on(sbi, old_ni.blk_addr != NULL_ADDR);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001014 new_ni = old_ni;
1015 new_ni.ino = dn->inode->i_ino;
Jaegeuk Kim479f40c2014-03-20 21:52:53 +09001016 set_node_addr(sbi, &new_ni, NEW_ADDR, false);
Jaegeuk Kim9c027402013-08-12 16:00:46 +09001017
Jaegeuk Kimfec1d652016-01-20 23:43:51 +08001018 f2fs_wait_on_page_writeback(page, NODE, true);
Jaegeuk Kim9c027402013-08-12 16:00:46 +09001019 fill_node_footer(page, dn->nid, dn->inode->i_ino, ofs, true);
Jaegeuk Kim398b1ac2012-12-19 15:28:39 +09001020 set_cold_node(dn->inode, page);
Jaegeuk Kim9c027402013-08-12 16:00:46 +09001021 SetPageUptodate(page);
Jaegeuk Kim12719ae2016-01-07 13:23:12 -08001022 if (set_page_dirty(page))
1023 dn->node_changed = true;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001024
Chao Yu4bc8e9b2014-03-17 16:35:06 +08001025 if (f2fs_has_xattr_block(ofs))
Jaegeuk Kim479bd732013-08-12 16:04:53 +09001026 F2FS_I(dn->inode)->i_xattr_nid = dn->nid;
1027
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001028 dn->node_page = page;
Jaegeuk Kim8ae8f162013-06-03 19:46:19 +09001029 if (ipage)
1030 update_inode(dn->inode, ipage);
1031 else
1032 sync_inode_page(dn);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001033 if (ofs == 0)
1034 inc_valid_inode_count(sbi);
1035
1036 return page;
1037
1038fail:
Jaegeuk Kim71e9fec2012-12-20 15:10:06 +09001039 clear_node_page_dirty(page);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001040 f2fs_put_page(page, 1);
1041 return ERR_PTR(err);
1042}
1043
Jaegeuk Kim56ae6742013-03-31 12:47:20 +09001044/*
1045 * Caller should do after getting the following values.
1046 * 0: f2fs_put_page(page, 0)
Jaegeuk Kim86531d62015-07-15 13:08:21 -07001047 * LOCKED_PAGE or error: f2fs_put_page(page, 1)
Jaegeuk Kim56ae6742013-03-31 12:47:20 +09001048 */
Jaegeuk Kim93dfe2a2013-11-30 12:51:14 +09001049static int read_node_page(struct page *page, int rw)
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001050{
Jaegeuk Kim40813632014-09-02 15:31:18 -07001051 struct f2fs_sb_info *sbi = F2FS_P_SB(page);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001052 struct node_info ni;
Jaegeuk Kimcf04e8e2014-12-17 19:33:13 -08001053 struct f2fs_io_info fio = {
Jaegeuk Kim05ca3632015-04-23 14:38:15 -07001054 .sbi = sbi,
Jaegeuk Kimcf04e8e2014-12-17 19:33:13 -08001055 .type = NODE,
1056 .rw = rw,
Jaegeuk Kim05ca3632015-04-23 14:38:15 -07001057 .page = page,
Jaegeuk Kim4375a332015-04-23 12:04:33 -07001058 .encrypted_page = NULL,
Jaegeuk Kimcf04e8e2014-12-17 19:33:13 -08001059 };
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001060
1061 get_node_info(sbi, page->index, &ni);
1062
Jaegeuk Kim6bacf522013-12-06 15:00:58 +09001063 if (unlikely(ni.blk_addr == NULL_ADDR)) {
Jaegeuk Kim2bca1e22015-02-25 19:25:01 -08001064 ClearPageUptodate(page);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001065 return -ENOENT;
Jaegeuk Kim393ff912013-03-08 21:29:23 +09001066 }
1067
Jaegeuk Kim56ae6742013-03-31 12:47:20 +09001068 if (PageUptodate(page))
1069 return LOCKED_PAGE;
Jaegeuk Kim393ff912013-03-08 21:29:23 +09001070
Chao Yu7a9d7542016-02-22 18:36:38 +08001071 fio.new_blkaddr = fio.old_blkaddr = ni.blk_addr;
Jaegeuk Kim05ca3632015-04-23 14:38:15 -07001072 return f2fs_submit_page_bio(&fio);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001073}
1074
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +09001075/*
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001076 * Readahead a node page
1077 */
1078void ra_node_page(struct f2fs_sb_info *sbi, nid_t nid)
1079{
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001080 struct page *apage;
Jaegeuk Kim56ae6742013-03-31 12:47:20 +09001081 int err;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001082
Chao Yue8458722016-01-08 20:13:37 +08001083 if (!nid)
1084 return;
1085 f2fs_bug_on(sbi, check_nid_range(sbi, nid));
1086
Fan Li999270d2016-02-29 14:29:51 +08001087 rcu_read_lock();
1088 apage = radix_tree_lookup(&NODE_MAPPING(sbi)->page_tree, nid);
1089 rcu_read_unlock();
1090 if (apage)
Jaegeuk Kim393ff912013-03-08 21:29:23 +09001091 return;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001092
Jaegeuk Kim4ef51a82014-01-21 18:51:16 +09001093 apage = grab_cache_page(NODE_MAPPING(sbi), nid);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001094 if (!apage)
1095 return;
1096
Jaegeuk Kim56ae6742013-03-31 12:47:20 +09001097 err = read_node_page(apage, READA);
Jaegeuk Kim86531d62015-07-15 13:08:21 -07001098 f2fs_put_page(apage, err ? 1 : 0);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001099}
1100
Chao Yu0e022ea2016-01-05 16:52:46 +08001101/*
1102 * readahead MAX_RA_NODE number of node pages.
1103 */
Jaegeuk Kim17a0ee52016-03-08 09:04:35 -08001104static void ra_node_pages(struct page *parent, int start)
Chao Yu0e022ea2016-01-05 16:52:46 +08001105{
1106 struct f2fs_sb_info *sbi = F2FS_P_SB(parent);
1107 struct blk_plug plug;
1108 int i, end;
1109 nid_t nid;
1110
1111 blk_start_plug(&plug);
1112
1113 /* Then, try readahead for siblings of the desired node */
1114 end = start + MAX_RA_NODE;
1115 end = min(end, NIDS_PER_BLOCK);
1116 for (i = start; i < end; i++) {
1117 nid = get_nid(parent, i, false);
1118 ra_node_page(sbi, nid);
1119 }
1120
1121 blk_finish_plug(&plug);
1122}
1123
Jaegeuk Kim17a0ee52016-03-08 09:04:35 -08001124static struct page *__get_node_page(struct f2fs_sb_info *sbi, pgoff_t nid,
Chao Yu0e022ea2016-01-05 16:52:46 +08001125 struct page *parent, int start)
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001126{
Jaegeuk Kim56ae6742013-03-31 12:47:20 +09001127 struct page *page;
1128 int err;
Jaegeuk Kim4aa69d52015-12-23 14:17:47 -08001129
1130 if (!nid)
1131 return ERR_PTR(-ENOENT);
1132 f2fs_bug_on(sbi, check_nid_range(sbi, nid));
Jaegeuk Kimafcb7ca02013-04-26 11:55:17 +09001133repeat:
Jaegeuk Kim54b591d2014-04-29 17:28:32 +09001134 page = grab_cache_page(NODE_MAPPING(sbi), nid);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001135 if (!page)
1136 return ERR_PTR(-ENOMEM);
1137
1138 err = read_node_page(page, READ_SYNC);
Jaegeuk Kim86531d62015-07-15 13:08:21 -07001139 if (err < 0) {
1140 f2fs_put_page(page, 1);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001141 return ERR_PTR(err);
Chao Yue1c51b9f2015-12-11 16:08:22 +08001142 } else if (err == LOCKED_PAGE) {
1143 goto page_hit;
Jaegeuk Kim86531d62015-07-15 13:08:21 -07001144 }
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001145
Chao Yu0e022ea2016-01-05 16:52:46 +08001146 if (parent)
1147 ra_node_pages(parent, start + 1);
1148
Chao Yue1c51b9f2015-12-11 16:08:22 +08001149 lock_page(page);
1150
1151 if (unlikely(!PageUptodate(page))) {
Jaegeuk Kim393ff912013-03-08 21:29:23 +09001152 f2fs_put_page(page, 1);
1153 return ERR_PTR(-EIO);
1154 }
Jaegeuk Kim4ef51a82014-01-21 18:51:16 +09001155 if (unlikely(page->mapping != NODE_MAPPING(sbi))) {
Jaegeuk Kimafcb7ca02013-04-26 11:55:17 +09001156 f2fs_put_page(page, 1);
1157 goto repeat;
1158 }
Chao Yue1c51b9f2015-12-11 16:08:22 +08001159page_hit:
1160 f2fs_bug_on(sbi, nid != nid_of_node(page));
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001161 return page;
1162}
1163
Chao Yu0e022ea2016-01-05 16:52:46 +08001164struct page *get_node_page(struct f2fs_sb_info *sbi, pgoff_t nid)
1165{
1166 return __get_node_page(sbi, nid, NULL, 0);
1167}
1168
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001169struct page *get_node_page_ra(struct page *parent, int start)
1170{
Jaegeuk Kim40813632014-09-02 15:31:18 -07001171 struct f2fs_sb_info *sbi = F2FS_P_SB(parent);
Chao Yu0e022ea2016-01-05 16:52:46 +08001172 nid_t nid = get_nid(parent, start, false);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001173
Chao Yu0e022ea2016-01-05 16:52:46 +08001174 return __get_node_page(sbi, nid, parent, start);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001175}
1176
1177void sync_inode_page(struct dnode_of_data *dn)
1178{
Jaegeuk Kim12719ae2016-01-07 13:23:12 -08001179 int ret = 0;
1180
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001181 if (IS_INODE(dn->node_page) || dn->inode_page == dn->node_page) {
Jaegeuk Kim12719ae2016-01-07 13:23:12 -08001182 ret = update_inode(dn->inode, dn->node_page);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001183 } else if (dn->inode_page) {
1184 if (!dn->inode_page_locked)
1185 lock_page(dn->inode_page);
Jaegeuk Kim12719ae2016-01-07 13:23:12 -08001186 ret = update_inode(dn->inode, dn->inode_page);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001187 if (!dn->inode_page_locked)
1188 unlock_page(dn->inode_page);
1189 } else {
Jaegeuk Kim12719ae2016-01-07 13:23:12 -08001190 ret = update_inode_page(dn->inode);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001191 }
Jaegeuk Kim12719ae2016-01-07 13:23:12 -08001192 dn->node_changed = ret ? true: false;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001193}
1194
Jaegeuk Kim2049d4f2016-01-25 05:57:05 -08001195static void flush_inline_data(struct f2fs_sb_info *sbi, nid_t ino)
1196{
1197 struct inode *inode;
1198 struct page *page;
1199
1200 /* should flush inline_data before evict_inode */
1201 inode = ilookup(sbi->sb, ino);
1202 if (!inode)
1203 return;
1204
Chao Yu19c73772016-02-26 09:33:04 +08001205 page = pagecache_get_page(inode->i_mapping, 0, FGP_NOWAIT, 0);
Jaegeuk Kim2049d4f2016-01-25 05:57:05 -08001206 if (!page)
1207 goto iput_out;
1208
Chao Yu19c73772016-02-26 09:33:04 +08001209 if (!trylock_page(page))
1210 goto release_out;
1211
Jaegeuk Kim2049d4f2016-01-25 05:57:05 -08001212 if (!PageUptodate(page))
1213 goto page_out;
1214
1215 if (!PageDirty(page))
1216 goto page_out;
1217
1218 if (!clear_page_dirty_for_io(page))
1219 goto page_out;
1220
1221 if (!f2fs_write_inline_data(inode, page))
1222 inode_dec_dirty_pages(inode);
1223 else
1224 set_page_dirty(page);
1225page_out:
Chao Yu19c73772016-02-26 09:33:04 +08001226 unlock_page(page);
1227release_out:
1228 f2fs_put_page(page, 0);
Jaegeuk Kim2049d4f2016-01-25 05:57:05 -08001229iput_out:
1230 iput(inode);
1231}
1232
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001233int sync_node_pages(struct f2fs_sb_info *sbi, nid_t ino,
1234 struct writeback_control *wbc)
1235{
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001236 pgoff_t index, end;
1237 struct pagevec pvec;
1238 int step = ino ? 2 : 0;
Jaegeuk Kim12bb0a82016-03-11 15:33:22 -08001239 int nwritten = 0;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001240
1241 pagevec_init(&pvec, 0);
1242
1243next_step:
1244 index = 0;
Chao Yu80dd9c02016-02-24 17:20:44 +08001245 end = ULONG_MAX;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001246
1247 while (index <= end) {
1248 int i, nr_pages;
Jaegeuk Kim4ef51a82014-01-21 18:51:16 +09001249 nr_pages = pagevec_lookup_tag(&pvec, NODE_MAPPING(sbi), &index,
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001250 PAGECACHE_TAG_DIRTY,
1251 min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1);
1252 if (nr_pages == 0)
1253 break;
1254
1255 for (i = 0; i < nr_pages; i++) {
1256 struct page *page = pvec.pages[i];
1257
Chao Yu6d5a1492015-12-24 18:04:56 +08001258 if (unlikely(f2fs_cp_error(sbi))) {
1259 pagevec_release(&pvec);
1260 return -EIO;
1261 }
1262
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001263 /*
1264 * flushing sequence with step:
1265 * 0. indirect nodes
1266 * 1. dentry dnodes
1267 * 2. file dnodes
1268 */
1269 if (step == 0 && IS_DNODE(page))
1270 continue;
1271 if (step == 1 && (!IS_DNODE(page) ||
1272 is_cold_node(page)))
1273 continue;
1274 if (step == 2 && (!IS_DNODE(page) ||
1275 !is_cold_node(page)))
1276 continue;
1277
1278 /*
1279 * If an fsync mode,
1280 * we should not skip writing node pages.
1281 */
Chao Yu9a4cbc92016-02-22 18:35:46 +08001282lock_node:
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001283 if (ino && ino_of_node(page) == ino)
1284 lock_page(page);
1285 else if (!trylock_page(page))
1286 continue;
1287
Jaegeuk Kim4ef51a82014-01-21 18:51:16 +09001288 if (unlikely(page->mapping != NODE_MAPPING(sbi))) {
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001289continue_unlock:
1290 unlock_page(page);
1291 continue;
1292 }
1293 if (ino && ino_of_node(page) != ino)
1294 goto continue_unlock;
1295
1296 if (!PageDirty(page)) {
1297 /* someone wrote it for us */
1298 goto continue_unlock;
1299 }
1300
Jaegeuk Kim2049d4f2016-01-25 05:57:05 -08001301 /* flush inline_data */
1302 if (!ino && is_inline_node(page)) {
1303 clear_inline_node(page);
1304 unlock_page(page);
1305 flush_inline_data(sbi, ino_of_node(page));
Chao Yu9a4cbc92016-02-22 18:35:46 +08001306 goto lock_node;
Jaegeuk Kim2049d4f2016-01-25 05:57:05 -08001307 }
1308
Jaegeuk Kimfa3d2bd2016-01-28 11:48:52 -08001309 f2fs_wait_on_page_writeback(page, NODE, true);
1310
1311 BUG_ON(PageWriteback(page));
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001312 if (!clear_page_dirty_for_io(page))
1313 goto continue_unlock;
1314
1315 /* called by fsync() */
1316 if (ino && IS_DNODE(page)) {
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001317 set_fsync_mark(page, 1);
Jaegeuk Kim2dcf51a2015-04-29 18:31:19 -07001318 if (IS_INODE(page))
1319 set_dentry_mark(page,
1320 need_dentry_mark(sbi, ino));
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001321 nwritten++;
1322 } else {
1323 set_fsync_mark(page, 0);
1324 set_dentry_mark(page, 0);
1325 }
Jaegeuk Kim52746512014-08-11 18:18:36 -07001326
1327 if (NODE_MAPPING(sbi)->a_ops->writepage(page, wbc))
1328 unlock_page(page);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001329
1330 if (--wbc->nr_to_write == 0)
1331 break;
1332 }
1333 pagevec_release(&pvec);
1334 cond_resched();
1335
1336 if (wbc->nr_to_write == 0) {
1337 step = 2;
1338 break;
1339 }
1340 }
1341
1342 if (step < 2) {
1343 step++;
1344 goto next_step;
1345 }
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001346 return nwritten;
1347}
1348
Jaegeuk Kimcfe58f92013-10-31 14:57:01 +09001349int wait_on_node_pages_writeback(struct f2fs_sb_info *sbi, nid_t ino)
1350{
Chao Yu80dd9c02016-02-24 17:20:44 +08001351 pgoff_t index = 0, end = ULONG_MAX;
Jaegeuk Kimcfe58f92013-10-31 14:57:01 +09001352 struct pagevec pvec;
Jaegeuk Kimcfe58f92013-10-31 14:57:01 +09001353 int ret2 = 0, ret = 0;
1354
1355 pagevec_init(&pvec, 0);
Jaegeuk Kim4ef51a82014-01-21 18:51:16 +09001356
1357 while (index <= end) {
1358 int i, nr_pages;
1359 nr_pages = pagevec_lookup_tag(&pvec, NODE_MAPPING(sbi), &index,
1360 PAGECACHE_TAG_WRITEBACK,
1361 min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1);
1362 if (nr_pages == 0)
1363 break;
Jaegeuk Kimcfe58f92013-10-31 14:57:01 +09001364
1365 for (i = 0; i < nr_pages; i++) {
1366 struct page *page = pvec.pages[i];
1367
1368 /* until radix tree lookup accepts end_index */
Chao Yucfb271d2013-12-05 17:15:22 +08001369 if (unlikely(page->index > end))
Jaegeuk Kimcfe58f92013-10-31 14:57:01 +09001370 continue;
1371
Chao Yu4bf08ff2013-11-04 10:28:33 +08001372 if (ino && ino_of_node(page) == ino) {
Jaegeuk Kimfec1d652016-01-20 23:43:51 +08001373 f2fs_wait_on_page_writeback(page, NODE, true);
Chao Yu4bf08ff2013-11-04 10:28:33 +08001374 if (TestClearPageError(page))
1375 ret = -EIO;
1376 }
Jaegeuk Kimcfe58f92013-10-31 14:57:01 +09001377 }
1378 pagevec_release(&pvec);
1379 cond_resched();
1380 }
1381
Jaegeuk Kim4ef51a82014-01-21 18:51:16 +09001382 if (unlikely(test_and_clear_bit(AS_ENOSPC, &NODE_MAPPING(sbi)->flags)))
Jaegeuk Kimcfe58f92013-10-31 14:57:01 +09001383 ret2 = -ENOSPC;
Jaegeuk Kim4ef51a82014-01-21 18:51:16 +09001384 if (unlikely(test_and_clear_bit(AS_EIO, &NODE_MAPPING(sbi)->flags)))
Jaegeuk Kimcfe58f92013-10-31 14:57:01 +09001385 ret2 = -EIO;
1386 if (!ret)
1387 ret = ret2;
1388 return ret;
1389}
1390
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001391static int f2fs_write_node_page(struct page *page,
1392 struct writeback_control *wbc)
1393{
Jaegeuk Kim40813632014-09-02 15:31:18 -07001394 struct f2fs_sb_info *sbi = F2FS_P_SB(page);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001395 nid_t nid;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001396 struct node_info ni;
Jaegeuk Kimfb5566d2014-01-08 10:09:51 +09001397 struct f2fs_io_info fio = {
Jaegeuk Kim05ca3632015-04-23 14:38:15 -07001398 .sbi = sbi,
Jaegeuk Kimfb5566d2014-01-08 10:09:51 +09001399 .type = NODE,
Chris Fries6c311ec2014-01-17 14:44:39 -06001400 .rw = (wbc->sync_mode == WB_SYNC_ALL) ? WRITE_SYNC : WRITE,
Jaegeuk Kim05ca3632015-04-23 14:38:15 -07001401 .page = page,
Jaegeuk Kim4375a332015-04-23 12:04:33 -07001402 .encrypted_page = NULL,
Jaegeuk Kimfb5566d2014-01-08 10:09:51 +09001403 };
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001404
Chao Yuecda0de2014-05-06 16:48:26 +08001405 trace_f2fs_writepage(page, NODE);
1406
Chao Yucaf00472015-01-28 17:48:42 +08001407 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
Jaegeuk Kim87a9bd22013-10-16 15:09:26 +09001408 goto redirty_out;
Jaegeuk Kimcf779ca2014-08-11 18:37:46 -07001409 if (unlikely(f2fs_cp_error(sbi)))
1410 goto redirty_out;
Jaegeuk Kim87a9bd22013-10-16 15:09:26 +09001411
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001412 /* get old block addr of this node page */
1413 nid = nid_of_node(page);
Jaegeuk Kim9850cf42014-09-02 15:52:58 -07001414 f2fs_bug_on(sbi, page->index != nid);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001415
Jaegeuk Kim25b93342015-09-12 11:13:04 -07001416 if (wbc->for_reclaim) {
1417 if (!down_read_trylock(&sbi->node_write))
1418 goto redirty_out;
1419 } else {
1420 down_read(&sbi->node_write);
1421 }
1422
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001423 get_node_info(sbi, nid, &ni);
1424
1425 /* This page is already truncated */
Jaegeuk Kim6bacf522013-12-06 15:00:58 +09001426 if (unlikely(ni.blk_addr == NULL_ADDR)) {
Jaegeuk Kim2bca1e22015-02-25 19:25:01 -08001427 ClearPageUptodate(page);
Jaegeuk Kim39936832012-11-22 16:21:29 +09001428 dec_page_count(sbi, F2FS_DIRTY_NODES);
Jaegeuk Kim25b93342015-09-12 11:13:04 -07001429 up_read(&sbi->node_write);
Jaegeuk Kim39936832012-11-22 16:21:29 +09001430 unlock_page(page);
1431 return 0;
1432 }
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001433
1434 set_page_writeback(page);
Chao Yu7a9d7542016-02-22 18:36:38 +08001435 fio.old_blkaddr = ni.blk_addr;
Jaegeuk Kim05ca3632015-04-23 14:38:15 -07001436 write_node_page(nid, &fio);
Chao Yu7a9d7542016-02-22 18:36:38 +08001437 set_node_addr(sbi, &ni, fio.new_blkaddr, is_fsync_dnode(page));
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001438 dec_page_count(sbi, F2FS_DIRTY_NODES);
Chao Yub3582c62014-07-03 18:58:39 +08001439 up_read(&sbi->node_write);
Chao Yu0c3a5792016-01-18 18:28:11 +08001440
1441 if (wbc->for_reclaim)
1442 f2fs_submit_merged_bio_cond(sbi, NULL, page, 0, NODE, WRITE);
1443
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001444 unlock_page(page);
Jaegeuk Kim27c6bd62014-11-19 10:54:48 -08001445
Chao Yu0c3a5792016-01-18 18:28:11 +08001446 if (unlikely(f2fs_cp_error(sbi)))
Jaegeuk Kim27c6bd62014-11-19 10:54:48 -08001447 f2fs_submit_merged_bio(sbi, NODE, WRITE);
1448
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001449 return 0;
Jaegeuk Kim87a9bd22013-10-16 15:09:26 +09001450
1451redirty_out:
Jaegeuk Kim76f60262014-04-15 16:04:15 +09001452 redirty_page_for_writepage(wbc, page);
Jaegeuk Kim87a9bd22013-10-16 15:09:26 +09001453 return AOP_WRITEPAGE_ACTIVATE;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001454}
1455
1456static int f2fs_write_node_pages(struct address_space *mapping,
1457 struct writeback_control *wbc)
1458{
Jaegeuk Kim40813632014-09-02 15:31:18 -07001459 struct f2fs_sb_info *sbi = F2FS_M_SB(mapping);
Jaegeuk Kim50c8cdb2014-03-18 13:47:11 +09001460 long diff;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001461
Jaegeuk Kim4660f9c2013-10-24 14:19:18 +09001462 /* balancing f2fs's metadata in background */
1463 f2fs_balance_fs_bg(sbi);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001464
Jaegeuk Kima7fdffb2013-01-18 14:54:13 +09001465 /* collect a number of dirty node pages and write together */
Jaegeuk Kim87d6f892014-03-18 12:40:49 +09001466 if (get_pages(sbi, F2FS_DIRTY_NODES) < nr_pages_to_skip(sbi, NODE))
Jaegeuk Kimd3baf952014-03-18 13:43:05 +09001467 goto skip_write;
Jaegeuk Kima7fdffb2013-01-18 14:54:13 +09001468
Yunlei Hed31c7c32016-02-04 16:14:00 +08001469 trace_f2fs_writepages(mapping->host, wbc, NODE);
1470
Jaegeuk Kim50c8cdb2014-03-18 13:47:11 +09001471 diff = nr_pages_to_write(sbi, NODE, wbc);
Jaegeuk Kimfb5566d2014-01-08 10:09:51 +09001472 wbc->sync_mode = WB_SYNC_NONE;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001473 sync_node_pages(sbi, 0, wbc);
Jaegeuk Kim50c8cdb2014-03-18 13:47:11 +09001474 wbc->nr_to_write = max((long)0, wbc->nr_to_write - diff);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001475 return 0;
Jaegeuk Kimd3baf952014-03-18 13:43:05 +09001476
1477skip_write:
1478 wbc->pages_skipped += get_pages(sbi, F2FS_DIRTY_NODES);
Yunlei Hed31c7c32016-02-04 16:14:00 +08001479 trace_f2fs_writepages(mapping->host, wbc, NODE);
Jaegeuk Kimd3baf952014-03-18 13:43:05 +09001480 return 0;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001481}
1482
1483static int f2fs_set_node_page_dirty(struct page *page)
1484{
Jaegeuk Kim26c6b882013-10-24 17:53:29 +09001485 trace_f2fs_set_page_dirty(page, NODE);
1486
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001487 SetPageUptodate(page);
1488 if (!PageDirty(page)) {
1489 __set_page_dirty_nobuffers(page);
Jaegeuk Kim40813632014-09-02 15:31:18 -07001490 inc_page_count(F2FS_P_SB(page), F2FS_DIRTY_NODES);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001491 SetPagePrivate(page);
Jaegeuk Kim9e4ded32014-12-17 19:58:58 -08001492 f2fs_trace_pid(page);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001493 return 1;
1494 }
1495 return 0;
1496}
1497
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +09001498/*
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001499 * Structure of the f2fs node operations
1500 */
1501const struct address_space_operations f2fs_node_aops = {
1502 .writepage = f2fs_write_node_page,
1503 .writepages = f2fs_write_node_pages,
1504 .set_page_dirty = f2fs_set_node_page_dirty,
Chao Yu487261f2015-02-05 17:44:29 +08001505 .invalidatepage = f2fs_invalidate_page,
1506 .releasepage = f2fs_release_page,
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001507};
1508
Jaegeuk Kim8a7ed662014-02-21 14:29:35 +09001509static struct free_nid *__lookup_free_nid_list(struct f2fs_nm_info *nm_i,
1510 nid_t n)
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001511{
Jaegeuk Kim8a7ed662014-02-21 14:29:35 +09001512 return radix_tree_lookup(&nm_i->free_nid_root, n);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001513}
1514
Jaegeuk Kim8a7ed662014-02-21 14:29:35 +09001515static void __del_from_free_nid_list(struct f2fs_nm_info *nm_i,
1516 struct free_nid *i)
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001517{
1518 list_del(&i->list);
Jaegeuk Kim8a7ed662014-02-21 14:29:35 +09001519 radix_tree_delete(&nm_i->free_nid_root, i->nid);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001520}
1521
Jaegeuk Kim6fb03f32014-04-16 10:47:06 +09001522static int add_free_nid(struct f2fs_sb_info *sbi, nid_t nid, bool build)
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001523{
Jaegeuk Kim6fb03f32014-04-16 10:47:06 +09001524 struct f2fs_nm_info *nm_i = NM_I(sbi);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001525 struct free_nid *i;
Jaegeuk Kim59bbd472013-05-07 20:47:40 +09001526 struct nat_entry *ne;
1527 bool allocated = false;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001528
Jaegeuk Kim6fb03f32014-04-16 10:47:06 +09001529 if (!available_free_memory(sbi, FREE_NIDS))
Haicheng Li23d38842013-05-06 23:15:43 +08001530 return -1;
Jaegeuk Kim9198ace2013-04-25 13:21:12 +09001531
1532 /* 0 nid should not be used */
Chao Yucfb271d2013-12-05 17:15:22 +08001533 if (unlikely(nid == 0))
Jaegeuk Kim9198ace2013-04-25 13:21:12 +09001534 return 0;
Jaegeuk Kim59bbd472013-05-07 20:47:40 +09001535
Gu Zheng7bd59382013-10-22 14:52:26 +08001536 if (build) {
1537 /* do not add allocated nids */
Gu Zheng7bd59382013-10-22 14:52:26 +08001538 ne = __lookup_nat_cache(nm_i, nid);
Jaegeuk Kima5131192016-01-02 09:19:41 -08001539 if (ne && (!get_nat_flag(ne, IS_CHECKPOINTED) ||
Jaegeuk Kim7ef35e32014-09-15 12:07:13 -07001540 nat_get_blkaddr(ne) != NULL_ADDR))
Gu Zheng7bd59382013-10-22 14:52:26 +08001541 allocated = true;
Gu Zheng7bd59382013-10-22 14:52:26 +08001542 if (allocated)
1543 return 0;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001544 }
Gu Zheng7bd59382013-10-22 14:52:26 +08001545
1546 i = f2fs_kmem_cache_alloc(free_nid_slab, GFP_NOFS);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001547 i->nid = nid;
1548 i->state = NID_NEW;
1549
Jaegeuk Kim769ec6e2014-12-03 20:47:26 -08001550 if (radix_tree_preload(GFP_NOFS)) {
1551 kmem_cache_free(free_nid_slab, i);
1552 return 0;
1553 }
1554
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001555 spin_lock(&nm_i->free_nid_list_lock);
Jaegeuk Kim8a7ed662014-02-21 14:29:35 +09001556 if (radix_tree_insert(&nm_i->free_nid_root, i->nid, i)) {
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001557 spin_unlock(&nm_i->free_nid_list_lock);
Jaegeuk Kim769ec6e2014-12-03 20:47:26 -08001558 radix_tree_preload_end();
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001559 kmem_cache_free(free_nid_slab, i);
1560 return 0;
1561 }
1562 list_add_tail(&i->list, &nm_i->free_nid_list);
1563 nm_i->fcnt++;
1564 spin_unlock(&nm_i->free_nid_list_lock);
Jaegeuk Kim769ec6e2014-12-03 20:47:26 -08001565 radix_tree_preload_end();
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001566 return 1;
1567}
1568
1569static void remove_free_nid(struct f2fs_nm_info *nm_i, nid_t nid)
1570{
1571 struct free_nid *i;
Chao Yucf0ee0f2014-04-02 08:55:00 +08001572 bool need_free = false;
1573
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001574 spin_lock(&nm_i->free_nid_list_lock);
Jaegeuk Kim8a7ed662014-02-21 14:29:35 +09001575 i = __lookup_free_nid_list(nm_i, nid);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001576 if (i && i->state == NID_NEW) {
Jaegeuk Kim8a7ed662014-02-21 14:29:35 +09001577 __del_from_free_nid_list(nm_i, i);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001578 nm_i->fcnt--;
Chao Yucf0ee0f2014-04-02 08:55:00 +08001579 need_free = true;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001580 }
1581 spin_unlock(&nm_i->free_nid_list_lock);
Chao Yucf0ee0f2014-04-02 08:55:00 +08001582
1583 if (need_free)
1584 kmem_cache_free(free_nid_slab, i);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001585}
1586
Jaegeuk Kim6fb03f32014-04-16 10:47:06 +09001587static void scan_nat_page(struct f2fs_sb_info *sbi,
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001588 struct page *nat_page, nid_t start_nid)
1589{
Jaegeuk Kim6fb03f32014-04-16 10:47:06 +09001590 struct f2fs_nm_info *nm_i = NM_I(sbi);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001591 struct f2fs_nat_block *nat_blk = page_address(nat_page);
1592 block_t blk_addr;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001593 int i;
1594
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001595 i = start_nid % NAT_ENTRY_PER_BLOCK;
1596
1597 for (; i < NAT_ENTRY_PER_BLOCK; i++, start_nid++) {
Haicheng Li23d38842013-05-06 23:15:43 +08001598
Chao Yucfb271d2013-12-05 17:15:22 +08001599 if (unlikely(start_nid >= nm_i->max_nid))
Jaegeuk Kim04431c42013-03-16 08:34:37 +09001600 break;
Haicheng Li23d38842013-05-06 23:15:43 +08001601
1602 blk_addr = le32_to_cpu(nat_blk->entries[i].block_addr);
Jaegeuk Kim9850cf42014-09-02 15:52:58 -07001603 f2fs_bug_on(sbi, blk_addr == NEW_ADDR);
Haicheng Li23d38842013-05-06 23:15:43 +08001604 if (blk_addr == NULL_ADDR) {
Jaegeuk Kim6fb03f32014-04-16 10:47:06 +09001605 if (add_free_nid(sbi, start_nid, true) < 0)
Haicheng Li23d38842013-05-06 23:15:43 +08001606 break;
1607 }
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001608 }
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001609}
1610
1611static void build_free_nids(struct f2fs_sb_info *sbi)
1612{
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001613 struct f2fs_nm_info *nm_i = NM_I(sbi);
1614 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA);
Chao Yub7ad7512016-02-19 18:08:46 +08001615 struct f2fs_journal *journal = curseg->journal;
Haicheng Li87609522013-05-06 23:15:42 +08001616 int i = 0;
Jaegeuk Kim55008d82013-04-25 16:05:51 +09001617 nid_t nid = nm_i->next_scan_nid;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001618
Jaegeuk Kim55008d82013-04-25 16:05:51 +09001619 /* Enough entries */
1620 if (nm_i->fcnt > NAT_ENTRY_PER_BLOCK)
1621 return;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001622
Jaegeuk Kim55008d82013-04-25 16:05:51 +09001623 /* readahead nat pages to be scanned */
Chao Yu26879fb2015-10-12 17:05:59 +08001624 ra_meta_pages(sbi, NAT_BLOCK_OFFSET(nid), FREE_NID_PAGES,
1625 META_NAT, true);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001626
Jaegeuk Kima5131192016-01-02 09:19:41 -08001627 down_read(&nm_i->nat_tree_lock);
1628
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001629 while (1) {
1630 struct page *page = get_current_nat_page(sbi, nid);
1631
Jaegeuk Kim6fb03f32014-04-16 10:47:06 +09001632 scan_nat_page(sbi, page, nid);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001633 f2fs_put_page(page, 1);
1634
1635 nid += (NAT_ENTRY_PER_BLOCK - (nid % NAT_ENTRY_PER_BLOCK));
Chao Yucfb271d2013-12-05 17:15:22 +08001636 if (unlikely(nid >= nm_i->max_nid))
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001637 nid = 0;
Jaegeuk Kim55008d82013-04-25 16:05:51 +09001638
Chao Yua6d494b2015-07-24 18:26:26 +08001639 if (++i >= FREE_NID_PAGES)
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001640 break;
1641 }
1642
Jaegeuk Kim55008d82013-04-25 16:05:51 +09001643 /* go to the next free nat pages to find free nids abundantly */
1644 nm_i->next_scan_nid = nid;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001645
1646 /* find free nids from current sum_pages */
Chao Yub7ad7512016-02-19 18:08:46 +08001647 down_read(&curseg->journal_rwsem);
Chao Yudfc08a12016-02-14 18:50:40 +08001648 for (i = 0; i < nats_in_cursum(journal); i++) {
1649 block_t addr;
1650
1651 addr = le32_to_cpu(nat_in_journal(journal, i).block_addr);
1652 nid = le32_to_cpu(nid_in_journal(journal, i));
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001653 if (addr == NULL_ADDR)
Jaegeuk Kim6fb03f32014-04-16 10:47:06 +09001654 add_free_nid(sbi, nid, true);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001655 else
1656 remove_free_nid(nm_i, nid);
1657 }
Chao Yub7ad7512016-02-19 18:08:46 +08001658 up_read(&curseg->journal_rwsem);
Jaegeuk Kima5131192016-01-02 09:19:41 -08001659 up_read(&nm_i->nat_tree_lock);
Chao Yu2db23882015-10-12 17:07:33 +08001660
1661 ra_meta_pages(sbi, NAT_BLOCK_OFFSET(nm_i->next_scan_nid),
Chao Yuea1a29a02015-10-12 17:08:48 +08001662 nm_i->ra_nid_pages, META_NAT, false);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001663}
1664
1665/*
1666 * If this function returns success, caller can obtain a new nid
1667 * from second parameter of this function.
1668 * The returned nid could be used ino as well as nid when inode is created.
1669 */
1670bool alloc_nid(struct f2fs_sb_info *sbi, nid_t *nid)
1671{
1672 struct f2fs_nm_info *nm_i = NM_I(sbi);
1673 struct free_nid *i = NULL;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001674retry:
Jaegeuk Kim7ee0eea2014-04-18 11:14:37 +09001675 if (unlikely(sbi->total_valid_node_count + 1 > nm_i->available_nids))
Jaegeuk Kim55008d82013-04-25 16:05:51 +09001676 return false;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001677
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001678 spin_lock(&nm_i->free_nid_list_lock);
Jaegeuk Kim55008d82013-04-25 16:05:51 +09001679
1680 /* We should not use stale free nids created by build_free_nids */
Gu Zhengf978f5a2014-02-21 18:08:29 +08001681 if (nm_i->fcnt && !on_build_free_nids(nm_i)) {
Jaegeuk Kim9850cf42014-09-02 15:52:58 -07001682 f2fs_bug_on(sbi, list_empty(&nm_i->free_nid_list));
Chao Yu2d7b8222014-03-29 11:33:17 +08001683 list_for_each_entry(i, &nm_i->free_nid_list, list)
Jaegeuk Kim55008d82013-04-25 16:05:51 +09001684 if (i->state == NID_NEW)
1685 break;
Jaegeuk Kim55008d82013-04-25 16:05:51 +09001686
Jaegeuk Kim9850cf42014-09-02 15:52:58 -07001687 f2fs_bug_on(sbi, i->state != NID_NEW);
Jaegeuk Kim55008d82013-04-25 16:05:51 +09001688 *nid = i->nid;
1689 i->state = NID_ALLOC;
1690 nm_i->fcnt--;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001691 spin_unlock(&nm_i->free_nid_list_lock);
Jaegeuk Kim55008d82013-04-25 16:05:51 +09001692 return true;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001693 }
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001694 spin_unlock(&nm_i->free_nid_list_lock);
Jaegeuk Kim55008d82013-04-25 16:05:51 +09001695
1696 /* Let's scan nat pages and its caches to get free nids */
1697 mutex_lock(&nm_i->build_lock);
Jaegeuk Kim55008d82013-04-25 16:05:51 +09001698 build_free_nids(sbi);
Jaegeuk Kim55008d82013-04-25 16:05:51 +09001699 mutex_unlock(&nm_i->build_lock);
1700 goto retry;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001701}
1702
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +09001703/*
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001704 * alloc_nid() should be called prior to this function.
1705 */
1706void alloc_nid_done(struct f2fs_sb_info *sbi, nid_t nid)
1707{
1708 struct f2fs_nm_info *nm_i = NM_I(sbi);
1709 struct free_nid *i;
1710
1711 spin_lock(&nm_i->free_nid_list_lock);
Jaegeuk Kim8a7ed662014-02-21 14:29:35 +09001712 i = __lookup_free_nid_list(nm_i, nid);
Jaegeuk Kim9850cf42014-09-02 15:52:58 -07001713 f2fs_bug_on(sbi, !i || i->state != NID_ALLOC);
Jaegeuk Kim8a7ed662014-02-21 14:29:35 +09001714 __del_from_free_nid_list(nm_i, i);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001715 spin_unlock(&nm_i->free_nid_list_lock);
Chao Yucf0ee0f2014-04-02 08:55:00 +08001716
1717 kmem_cache_free(free_nid_slab, i);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001718}
1719
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +09001720/*
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001721 * alloc_nid() should be called prior to this function.
1722 */
1723void alloc_nid_failed(struct f2fs_sb_info *sbi, nid_t nid)
1724{
Jaegeuk Kim49952fa2013-04-03 22:19:03 +09001725 struct f2fs_nm_info *nm_i = NM_I(sbi);
1726 struct free_nid *i;
Chao Yucf0ee0f2014-04-02 08:55:00 +08001727 bool need_free = false;
Jaegeuk Kim49952fa2013-04-03 22:19:03 +09001728
Jaegeuk Kim65985d92013-08-14 21:57:27 +09001729 if (!nid)
1730 return;
1731
Jaegeuk Kim49952fa2013-04-03 22:19:03 +09001732 spin_lock(&nm_i->free_nid_list_lock);
Jaegeuk Kim8a7ed662014-02-21 14:29:35 +09001733 i = __lookup_free_nid_list(nm_i, nid);
Jaegeuk Kim9850cf42014-09-02 15:52:58 -07001734 f2fs_bug_on(sbi, !i || i->state != NID_ALLOC);
Jaegeuk Kim6fb03f32014-04-16 10:47:06 +09001735 if (!available_free_memory(sbi, FREE_NIDS)) {
Jaegeuk Kim8a7ed662014-02-21 14:29:35 +09001736 __del_from_free_nid_list(nm_i, i);
Chao Yucf0ee0f2014-04-02 08:55:00 +08001737 need_free = true;
Haicheng Li95630cb2013-05-06 23:15:41 +08001738 } else {
1739 i->state = NID_NEW;
1740 nm_i->fcnt++;
1741 }
Jaegeuk Kim49952fa2013-04-03 22:19:03 +09001742 spin_unlock(&nm_i->free_nid_list_lock);
Chao Yucf0ee0f2014-04-02 08:55:00 +08001743
1744 if (need_free)
1745 kmem_cache_free(free_nid_slab, i);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001746}
1747
Chao Yu31696582015-07-28 18:33:46 +08001748int try_to_free_nids(struct f2fs_sb_info *sbi, int nr_shrink)
1749{
1750 struct f2fs_nm_info *nm_i = NM_I(sbi);
1751 struct free_nid *i, *next;
1752 int nr = nr_shrink;
1753
1754 if (!mutex_trylock(&nm_i->build_lock))
1755 return 0;
1756
1757 spin_lock(&nm_i->free_nid_list_lock);
1758 list_for_each_entry_safe(i, next, &nm_i->free_nid_list, list) {
1759 if (nr_shrink <= 0 || nm_i->fcnt <= NAT_ENTRY_PER_BLOCK)
1760 break;
1761 if (i->state == NID_ALLOC)
1762 continue;
1763 __del_from_free_nid_list(nm_i, i);
Chao Yu31696582015-07-28 18:33:46 +08001764 kmem_cache_free(free_nid_slab, i);
Jaegeuk Kimf7409d02015-08-21 23:37:18 -07001765 nm_i->fcnt--;
Chao Yu31696582015-07-28 18:33:46 +08001766 nr_shrink--;
Chao Yu31696582015-07-28 18:33:46 +08001767 }
1768 spin_unlock(&nm_i->free_nid_list_lock);
1769 mutex_unlock(&nm_i->build_lock);
1770
1771 return nr - nr_shrink;
1772}
1773
Chao Yu70cfed82014-08-02 15:26:04 +08001774void recover_inline_xattr(struct inode *inode, struct page *page)
Chao Yu28cdce02014-03-11 13:37:38 +08001775{
Chao Yu28cdce02014-03-11 13:37:38 +08001776 void *src_addr, *dst_addr;
1777 size_t inline_size;
1778 struct page *ipage;
1779 struct f2fs_inode *ri;
1780
Jaegeuk Kim40813632014-09-02 15:31:18 -07001781 ipage = get_node_page(F2FS_I_SB(inode), inode->i_ino);
Jaegeuk Kim9850cf42014-09-02 15:52:58 -07001782 f2fs_bug_on(F2FS_I_SB(inode), IS_ERR(ipage));
Chao Yu28cdce02014-03-11 13:37:38 +08001783
Jaegeuk Kime3b4d432014-08-07 23:45:42 -07001784 ri = F2FS_INODE(page);
1785 if (!(ri->i_inline & F2FS_INLINE_XATTR)) {
1786 clear_inode_flag(F2FS_I(inode), FI_INLINE_XATTR);
1787 goto update_inode;
1788 }
1789
Chao Yu28cdce02014-03-11 13:37:38 +08001790 dst_addr = inline_xattr_addr(ipage);
1791 src_addr = inline_xattr_addr(page);
1792 inline_size = inline_xattr_size(inode);
1793
Jaegeuk Kimfec1d652016-01-20 23:43:51 +08001794 f2fs_wait_on_page_writeback(ipage, NODE, true);
Chao Yu28cdce02014-03-11 13:37:38 +08001795 memcpy(dst_addr, src_addr, inline_size);
Jaegeuk Kime3b4d432014-08-07 23:45:42 -07001796update_inode:
Chao Yu28cdce02014-03-11 13:37:38 +08001797 update_inode(inode, ipage);
1798 f2fs_put_page(ipage, 1);
1799}
1800
Jaegeuk Kim1c35a902014-08-07 23:49:17 -07001801void recover_xattr_data(struct inode *inode, struct page *page, block_t blkaddr)
Jaegeuk Kimabb23662014-01-28 12:25:06 +09001802{
Jaegeuk Kim40813632014-09-02 15:31:18 -07001803 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
Jaegeuk Kimabb23662014-01-28 12:25:06 +09001804 nid_t prev_xnid = F2FS_I(inode)->i_xattr_nid;
1805 nid_t new_xnid = nid_of_node(page);
1806 struct node_info ni;
1807
Jaegeuk Kimabb23662014-01-28 12:25:06 +09001808 /* 1: invalidate the previous xattr nid */
1809 if (!prev_xnid)
1810 goto recover_xnid;
1811
1812 /* Deallocate node address */
1813 get_node_info(sbi, prev_xnid, &ni);
Jaegeuk Kim9850cf42014-09-02 15:52:58 -07001814 f2fs_bug_on(sbi, ni.blk_addr == NULL_ADDR);
Jaegeuk Kimabb23662014-01-28 12:25:06 +09001815 invalidate_blocks(sbi, ni.blk_addr);
1816 dec_valid_node_count(sbi, inode);
Jaegeuk Kim479f40c2014-03-20 21:52:53 +09001817 set_node_addr(sbi, &ni, NULL_ADDR, false);
Jaegeuk Kimabb23662014-01-28 12:25:06 +09001818
1819recover_xnid:
1820 /* 2: allocate new xattr nid */
1821 if (unlikely(!inc_valid_node_count(sbi, inode)))
Jaegeuk Kim9850cf42014-09-02 15:52:58 -07001822 f2fs_bug_on(sbi, 1);
Jaegeuk Kimabb23662014-01-28 12:25:06 +09001823
1824 remove_free_nid(NM_I(sbi), new_xnid);
1825 get_node_info(sbi, new_xnid, &ni);
1826 ni.ino = inode->i_ino;
Jaegeuk Kim479f40c2014-03-20 21:52:53 +09001827 set_node_addr(sbi, &ni, NEW_ADDR, false);
Jaegeuk Kimabb23662014-01-28 12:25:06 +09001828 F2FS_I(inode)->i_xattr_nid = new_xnid;
1829
1830 /* 3: update xattr blkaddr */
1831 refresh_sit_entry(sbi, NEW_ADDR, blkaddr);
Jaegeuk Kim479f40c2014-03-20 21:52:53 +09001832 set_node_addr(sbi, &ni, blkaddr, false);
Jaegeuk Kimabb23662014-01-28 12:25:06 +09001833
1834 update_inode_page(inode);
Jaegeuk Kimabb23662014-01-28 12:25:06 +09001835}
1836
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001837int recover_inode_page(struct f2fs_sb_info *sbi, struct page *page)
1838{
Jaegeuk Kim58bfaf42013-12-26 16:30:41 +09001839 struct f2fs_inode *src, *dst;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001840 nid_t ino = ino_of_node(page);
1841 struct node_info old_ni, new_ni;
1842 struct page *ipage;
1843
Jaegeuk Kime8271fa2014-04-18 15:21:04 +09001844 get_node_info(sbi, ino, &old_ni);
1845
1846 if (unlikely(old_ni.blk_addr != NULL_ADDR))
1847 return -EINVAL;
1848
Jaegeuk Kim4ef51a82014-01-21 18:51:16 +09001849 ipage = grab_cache_page(NODE_MAPPING(sbi), ino);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001850 if (!ipage)
1851 return -ENOMEM;
1852
arter97e1c42042014-08-06 23:22:50 +09001853 /* Should not use this inode from free nid list */
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001854 remove_free_nid(NM_I(sbi), ino);
1855
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001856 SetPageUptodate(ipage);
1857 fill_node_footer(ipage, ino, ino, 0, true);
1858
Jaegeuk Kim58bfaf42013-12-26 16:30:41 +09001859 src = F2FS_INODE(page);
1860 dst = F2FS_INODE(ipage);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001861
Jaegeuk Kim58bfaf42013-12-26 16:30:41 +09001862 memcpy(dst, src, (unsigned long)&src->i_ext - (unsigned long)src);
1863 dst->i_size = 0;
1864 dst->i_blocks = cpu_to_le64(1);
1865 dst->i_links = cpu_to_le32(1);
1866 dst->i_xattr_nid = 0;
Jaegeuk Kim617deb82014-08-07 17:04:24 -07001867 dst->i_inline = src->i_inline & F2FS_INLINE_XATTR;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001868
1869 new_ni = old_ni;
1870 new_ni.ino = ino;
1871
Chao Yucfb271d2013-12-05 17:15:22 +08001872 if (unlikely(!inc_valid_node_count(sbi, NULL)))
Jaegeuk Kim65e5cd02013-05-14 15:47:43 +09001873 WARN_ON(1);
Jaegeuk Kim479f40c2014-03-20 21:52:53 +09001874 set_node_addr(sbi, &new_ni, NEW_ADDR, false);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001875 inc_valid_inode_count(sbi);
Jaegeuk Kim617deb82014-08-07 17:04:24 -07001876 set_page_dirty(ipage);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001877 f2fs_put_page(ipage, 1);
1878 return 0;
1879}
1880
1881int restore_node_summary(struct f2fs_sb_info *sbi,
1882 unsigned int segno, struct f2fs_summary_block *sum)
1883{
1884 struct f2fs_node *rn;
1885 struct f2fs_summary *sum_entry;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001886 block_t addr;
Jaegeuk Kim90a893c2014-09-22 16:21:07 -07001887 int bio_blocks = MAX_BIO_BLOCKS(sbi);
Chao Yu9ecf4b82014-12-18 18:29:05 +08001888 int i, idx, last_offset, nrpages;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001889
1890 /* scan the node segment */
1891 last_offset = sbi->blocks_per_seg;
1892 addr = START_BLOCK(sbi, segno);
1893 sum_entry = &sum->entries[0];
1894
Chao Yu9ecf4b82014-12-18 18:29:05 +08001895 for (i = 0; i < last_offset; i += nrpages, addr += nrpages) {
Chao Yu9af0ff12013-11-22 15:48:54 +08001896 nrpages = min(last_offset - i, bio_blocks);
Jaegeuk Kim393ff912013-03-08 21:29:23 +09001897
arter97e1c42042014-08-06 23:22:50 +09001898 /* readahead node pages */
Chao Yu26879fb2015-10-12 17:05:59 +08001899 ra_meta_pages(sbi, addr, nrpages, META_POR, true);
Jaegeuk Kim393ff912013-03-08 21:29:23 +09001900
Chao Yu9ecf4b82014-12-18 18:29:05 +08001901 for (idx = addr; idx < addr + nrpages; idx++) {
Chao Yu2b947002015-10-12 17:04:21 +08001902 struct page *page = get_tmp_page(sbi, idx);
Chao Yu9af0ff12013-11-22 15:48:54 +08001903
Chao Yu9ecf4b82014-12-18 18:29:05 +08001904 rn = F2FS_NODE(page);
1905 sum_entry->nid = rn->footer.nid;
1906 sum_entry->version = 0;
1907 sum_entry->ofs_in_node = 0;
1908 sum_entry++;
1909 f2fs_put_page(page, 1);
Chao Yu9af0ff12013-11-22 15:48:54 +08001910 }
Chao Yubac4eef2014-05-27 08:41:07 +08001911
Chao Yu9ecf4b82014-12-18 18:29:05 +08001912 invalidate_mapping_pages(META_MAPPING(sbi), addr,
Chao Yubac4eef2014-05-27 08:41:07 +08001913 addr + nrpages);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001914 }
Chao Yu9ecf4b82014-12-18 18:29:05 +08001915 return 0;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001916}
1917
Chao Yuaec71382014-06-24 09:18:20 +08001918static void remove_nats_in_journal(struct f2fs_sb_info *sbi)
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001919{
1920 struct f2fs_nm_info *nm_i = NM_I(sbi);
1921 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA);
Chao Yub7ad7512016-02-19 18:08:46 +08001922 struct f2fs_journal *journal = curseg->journal;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001923 int i;
1924
Chao Yub7ad7512016-02-19 18:08:46 +08001925 down_write(&curseg->journal_rwsem);
Chao Yudfc08a12016-02-14 18:50:40 +08001926 for (i = 0; i < nats_in_cursum(journal); i++) {
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001927 struct nat_entry *ne;
1928 struct f2fs_nat_entry raw_ne;
Chao Yudfc08a12016-02-14 18:50:40 +08001929 nid_t nid = le32_to_cpu(nid_in_journal(journal, i));
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001930
Chao Yudfc08a12016-02-14 18:50:40 +08001931 raw_ne = nat_in_journal(journal, i);
Jaegeuk Kim9be32d72014-12-05 10:39:49 -08001932
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001933 ne = __lookup_nat_cache(nm_i, nid);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001934 if (!ne) {
Jaegeuk Kim9be32d72014-12-05 10:39:49 -08001935 ne = grab_nat_entry(nm_i, nid);
1936 node_info_from_raw_nat(&ne->ni, &raw_ne);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001937 }
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001938 __set_nat_cache_dirty(nm_i, ne);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001939 }
Chao Yudfc08a12016-02-14 18:50:40 +08001940 update_nats_in_cursum(journal, -i);
Chao Yub7ad7512016-02-19 18:08:46 +08001941 up_write(&curseg->journal_rwsem);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09001942}
1943
Jaegeuk Kim309cc2b2014-09-22 11:40:48 -07001944static void __adjust_nat_entry_set(struct nat_entry_set *nes,
1945 struct list_head *head, int max)
1946{
1947 struct nat_entry_set *cur;
1948
1949 if (nes->entry_cnt >= max)
1950 goto add_out;
1951
1952 list_for_each_entry(cur, head, set_list) {
1953 if (cur->entry_cnt >= nes->entry_cnt) {
1954 list_add(&nes->set_list, cur->set_list.prev);
1955 return;
1956 }
1957 }
1958add_out:
1959 list_add_tail(&nes->set_list, head);
1960}
1961
1962static void __flush_nat_entry_set(struct f2fs_sb_info *sbi,
1963 struct nat_entry_set *set)
1964{
1965 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA);
Chao Yub7ad7512016-02-19 18:08:46 +08001966 struct f2fs_journal *journal = curseg->journal;
Jaegeuk Kim309cc2b2014-09-22 11:40:48 -07001967 nid_t start_nid = set->set * NAT_ENTRY_PER_BLOCK;
1968 bool to_journal = true;
1969 struct f2fs_nat_block *nat_blk;
1970 struct nat_entry *ne, *cur;
1971 struct page *page = NULL;
1972
1973 /*
1974 * there are two steps to flush nat entries:
1975 * #1, flush nat entries to journal in current hot data summary block.
1976 * #2, flush nat entries to nat page.
1977 */
Chao Yudfc08a12016-02-14 18:50:40 +08001978 if (!__has_cursum_space(journal, set->entry_cnt, NAT_JOURNAL))
Jaegeuk Kim309cc2b2014-09-22 11:40:48 -07001979 to_journal = false;
1980
1981 if (to_journal) {
Chao Yub7ad7512016-02-19 18:08:46 +08001982 down_write(&curseg->journal_rwsem);
Jaegeuk Kim309cc2b2014-09-22 11:40:48 -07001983 } else {
1984 page = get_next_nat_page(sbi, start_nid);
1985 nat_blk = page_address(page);
1986 f2fs_bug_on(sbi, !nat_blk);
1987 }
1988
1989 /* flush dirty nats in nat entry set */
1990 list_for_each_entry_safe(ne, cur, &set->entry_list, list) {
1991 struct f2fs_nat_entry *raw_ne;
1992 nid_t nid = nat_get_nid(ne);
1993 int offset;
1994
1995 if (nat_get_blkaddr(ne) == NEW_ADDR)
1996 continue;
1997
1998 if (to_journal) {
Chao Yudfc08a12016-02-14 18:50:40 +08001999 offset = lookup_journal_in_cursum(journal,
Jaegeuk Kim309cc2b2014-09-22 11:40:48 -07002000 NAT_JOURNAL, nid, 1);
2001 f2fs_bug_on(sbi, offset < 0);
Chao Yudfc08a12016-02-14 18:50:40 +08002002 raw_ne = &nat_in_journal(journal, offset);
2003 nid_in_journal(journal, offset) = cpu_to_le32(nid);
Jaegeuk Kim309cc2b2014-09-22 11:40:48 -07002004 } else {
2005 raw_ne = &nat_blk->entries[nid - start_nid];
2006 }
2007 raw_nat_from_node_info(raw_ne, &ne->ni);
Jaegeuk Kim309cc2b2014-09-22 11:40:48 -07002008 nat_reset_flag(ne);
2009 __clear_nat_cache_dirty(NM_I(sbi), ne);
Jaegeuk Kim309cc2b2014-09-22 11:40:48 -07002010 if (nat_get_blkaddr(ne) == NULL_ADDR)
2011 add_free_nid(sbi, nid, false);
2012 }
2013
2014 if (to_journal)
Chao Yub7ad7512016-02-19 18:08:46 +08002015 up_write(&curseg->journal_rwsem);
Jaegeuk Kim309cc2b2014-09-22 11:40:48 -07002016 else
2017 f2fs_put_page(page, 1);
2018
Changman Lee80ec2e92014-11-25 12:44:24 +09002019 f2fs_bug_on(sbi, set->entry_cnt);
2020
2021 radix_tree_delete(&NM_I(sbi)->nat_set_root, set->set);
2022 kmem_cache_free(nat_entry_set_slab, set);
Jaegeuk Kim309cc2b2014-09-22 11:40:48 -07002023}
2024
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +09002025/*
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09002026 * This function is called during the checkpointing process.
2027 */
2028void flush_nat_entries(struct f2fs_sb_info *sbi)
2029{
2030 struct f2fs_nm_info *nm_i = NM_I(sbi);
2031 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA);
Chao Yub7ad7512016-02-19 18:08:46 +08002032 struct f2fs_journal *journal = curseg->journal;
Jaegeuk Kim7aed0d42015-01-07 10:47:57 -08002033 struct nat_entry_set *setvec[SETVEC_SIZE];
Jaegeuk Kim309cc2b2014-09-22 11:40:48 -07002034 struct nat_entry_set *set, *tmp;
2035 unsigned int found;
2036 nid_t set_idx = 0;
2037 LIST_HEAD(sets);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09002038
Changman Lee20d047c2014-11-25 12:44:23 +09002039 if (!nm_i->dirty_nat_cnt)
2040 return;
Jaegeuk Kima5131192016-01-02 09:19:41 -08002041
2042 down_write(&nm_i->nat_tree_lock);
2043
Chao Yuaec71382014-06-24 09:18:20 +08002044 /*
2045 * if there are no enough space in journal to store dirty nat
2046 * entries, remove all entries from journal and merge them
2047 * into nat entry set.
2048 */
Chao Yudfc08a12016-02-14 18:50:40 +08002049 if (!__has_cursum_space(journal, nm_i->dirty_nat_cnt, NAT_JOURNAL))
Chao Yuaec71382014-06-24 09:18:20 +08002050 remove_nats_in_journal(sbi);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09002051
Jaegeuk Kim309cc2b2014-09-22 11:40:48 -07002052 while ((found = __gang_lookup_nat_set(nm_i,
Jaegeuk Kim7aed0d42015-01-07 10:47:57 -08002053 set_idx, SETVEC_SIZE, setvec))) {
Jaegeuk Kim309cc2b2014-09-22 11:40:48 -07002054 unsigned idx;
2055 set_idx = setvec[found - 1]->set + 1;
2056 for (idx = 0; idx < found; idx++)
2057 __adjust_nat_entry_set(setvec[idx], &sets,
Chao Yudfc08a12016-02-14 18:50:40 +08002058 MAX_NAT_JENTRIES(journal));
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09002059 }
Chao Yuaec71382014-06-24 09:18:20 +08002060
Jaegeuk Kim309cc2b2014-09-22 11:40:48 -07002061 /* flush dirty nats in nat entry set */
2062 list_for_each_entry_safe(set, tmp, &sets, set_list)
2063 __flush_nat_entry_set(sbi, set);
2064
Jaegeuk Kima5131192016-01-02 09:19:41 -08002065 up_write(&nm_i->nat_tree_lock);
2066
Jaegeuk Kim9850cf42014-09-02 15:52:58 -07002067 f2fs_bug_on(sbi, nm_i->dirty_nat_cnt);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09002068}
2069
2070static int init_node_manager(struct f2fs_sb_info *sbi)
2071{
2072 struct f2fs_super_block *sb_raw = F2FS_RAW_SUPER(sbi);
2073 struct f2fs_nm_info *nm_i = NM_I(sbi);
2074 unsigned char *version_bitmap;
2075 unsigned int nat_segs, nat_blocks;
2076
2077 nm_i->nat_blkaddr = le32_to_cpu(sb_raw->nat_blkaddr);
2078
2079 /* segment_count_nat includes pair segment so divide to 2. */
2080 nat_segs = le32_to_cpu(sb_raw->segment_count_nat) >> 1;
2081 nat_blocks = nat_segs << le32_to_cpu(sb_raw->log_blocks_per_seg);
Jaegeuk Kimb63da152014-02-17 12:44:20 +09002082
Jaegeuk Kim7ee0eea2014-04-18 11:14:37 +09002083 nm_i->max_nid = NAT_ENTRY_PER_BLOCK * nat_blocks;
2084
Jaegeuk Kimb63da152014-02-17 12:44:20 +09002085 /* not used nids: 0, node, meta, (and root counted as valid node) */
Chao Yuc200b1a2014-08-20 18:36:46 +08002086 nm_i->available_nids = nm_i->max_nid - F2FS_RESERVED_NODE_NUM;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09002087 nm_i->fcnt = 0;
2088 nm_i->nat_cnt = 0;
Jaegeuk Kimcdfc41c2014-03-19 13:31:37 +09002089 nm_i->ram_thresh = DEF_RAM_THRESHOLD;
Chao Yuea1a29a02015-10-12 17:08:48 +08002090 nm_i->ra_nid_pages = DEF_RA_NID_PAGES;
Chao Yu2304cb02016-01-18 18:32:58 +08002091 nm_i->dirty_nats_ratio = DEF_DIRTY_NAT_RATIO_THRESHOLD;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09002092
Jaegeuk Kim8a7ed662014-02-21 14:29:35 +09002093 INIT_RADIX_TREE(&nm_i->free_nid_root, GFP_ATOMIC);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09002094 INIT_LIST_HEAD(&nm_i->free_nid_list);
Jaegeuk Kim769ec6e2014-12-03 20:47:26 -08002095 INIT_RADIX_TREE(&nm_i->nat_root, GFP_NOIO);
2096 INIT_RADIX_TREE(&nm_i->nat_set_root, GFP_NOIO);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09002097 INIT_LIST_HEAD(&nm_i->nat_entries);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09002098
2099 mutex_init(&nm_i->build_lock);
2100 spin_lock_init(&nm_i->free_nid_list_lock);
Jaegeuk Kim8b26ef92014-12-03 21:15:10 -08002101 init_rwsem(&nm_i->nat_tree_lock);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09002102
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09002103 nm_i->next_scan_nid = le32_to_cpu(sbi->ckpt->next_free_nid);
Alexandru Gheorghiu79b57932013-03-28 02:24:53 +02002104 nm_i->bitmap_size = __bitmap_size(sbi, NAT_BITMAP);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09002105 version_bitmap = __bitmap_ptr(sbi, NAT_BITMAP);
2106 if (!version_bitmap)
2107 return -EFAULT;
2108
Alexandru Gheorghiu79b57932013-03-28 02:24:53 +02002109 nm_i->nat_bitmap = kmemdup(version_bitmap, nm_i->bitmap_size,
2110 GFP_KERNEL);
2111 if (!nm_i->nat_bitmap)
2112 return -ENOMEM;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09002113 return 0;
2114}
2115
2116int build_node_manager(struct f2fs_sb_info *sbi)
2117{
2118 int err;
2119
2120 sbi->nm_info = kzalloc(sizeof(struct f2fs_nm_info), GFP_KERNEL);
2121 if (!sbi->nm_info)
2122 return -ENOMEM;
2123
2124 err = init_node_manager(sbi);
2125 if (err)
2126 return err;
2127
2128 build_free_nids(sbi);
2129 return 0;
2130}
2131
2132void destroy_node_manager(struct f2fs_sb_info *sbi)
2133{
2134 struct f2fs_nm_info *nm_i = NM_I(sbi);
2135 struct free_nid *i, *next_i;
2136 struct nat_entry *natvec[NATVEC_SIZE];
Jaegeuk Kim7aed0d42015-01-07 10:47:57 -08002137 struct nat_entry_set *setvec[SETVEC_SIZE];
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09002138 nid_t nid = 0;
2139 unsigned int found;
2140
2141 if (!nm_i)
2142 return;
2143
2144 /* destroy free nid list */
2145 spin_lock(&nm_i->free_nid_list_lock);
2146 list_for_each_entry_safe(i, next_i, &nm_i->free_nid_list, list) {
Jaegeuk Kim9850cf42014-09-02 15:52:58 -07002147 f2fs_bug_on(sbi, i->state == NID_ALLOC);
Jaegeuk Kim8a7ed662014-02-21 14:29:35 +09002148 __del_from_free_nid_list(nm_i, i);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09002149 nm_i->fcnt--;
Chao Yucf0ee0f2014-04-02 08:55:00 +08002150 spin_unlock(&nm_i->free_nid_list_lock);
2151 kmem_cache_free(free_nid_slab, i);
2152 spin_lock(&nm_i->free_nid_list_lock);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09002153 }
Jaegeuk Kim9850cf42014-09-02 15:52:58 -07002154 f2fs_bug_on(sbi, nm_i->fcnt);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09002155 spin_unlock(&nm_i->free_nid_list_lock);
2156
2157 /* destroy nat cache */
Jaegeuk Kim8b26ef92014-12-03 21:15:10 -08002158 down_write(&nm_i->nat_tree_lock);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09002159 while ((found = __gang_lookup_nat_cache(nm_i,
2160 nid, NATVEC_SIZE, natvec))) {
2161 unsigned idx;
Jaegeuk Kim7aed0d42015-01-07 10:47:57 -08002162
Gu Zhengb6ce3912014-03-07 18:43:24 +08002163 nid = nat_get_nid(natvec[found - 1]) + 1;
2164 for (idx = 0; idx < found; idx++)
2165 __del_from_nat_cache(nm_i, natvec[idx]);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09002166 }
Jaegeuk Kim9850cf42014-09-02 15:52:58 -07002167 f2fs_bug_on(sbi, nm_i->nat_cnt);
Jaegeuk Kim7aed0d42015-01-07 10:47:57 -08002168
2169 /* destroy nat set cache */
2170 nid = 0;
2171 while ((found = __gang_lookup_nat_set(nm_i,
2172 nid, SETVEC_SIZE, setvec))) {
2173 unsigned idx;
2174
2175 nid = setvec[found - 1]->set + 1;
2176 for (idx = 0; idx < found; idx++) {
2177 /* entry_cnt is not zero, when cp_error was occurred */
2178 f2fs_bug_on(sbi, !list_empty(&setvec[idx]->entry_list));
2179 radix_tree_delete(&nm_i->nat_set_root, setvec[idx]->set);
2180 kmem_cache_free(nat_entry_set_slab, setvec[idx]);
2181 }
2182 }
Jaegeuk Kim8b26ef92014-12-03 21:15:10 -08002183 up_write(&nm_i->nat_tree_lock);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09002184
2185 kfree(nm_i->nat_bitmap);
2186 sbi->nm_info = NULL;
2187 kfree(nm_i);
2188}
2189
Namjae Jeon6e6093a2013-01-17 00:08:30 +09002190int __init create_node_manager_caches(void)
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09002191{
2192 nat_entry_slab = f2fs_kmem_cache_create("nat_entry",
Gu Zhenge8512d22014-03-07 18:43:28 +08002193 sizeof(struct nat_entry));
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09002194 if (!nat_entry_slab)
Chao Yuaec71382014-06-24 09:18:20 +08002195 goto fail;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09002196
2197 free_nid_slab = f2fs_kmem_cache_create("free_nid",
Gu Zhenge8512d22014-03-07 18:43:28 +08002198 sizeof(struct free_nid));
Chao Yuaec71382014-06-24 09:18:20 +08002199 if (!free_nid_slab)
Markus Elfringce3e6d22014-11-24 15:52:00 +01002200 goto destroy_nat_entry;
Chao Yuaec71382014-06-24 09:18:20 +08002201
2202 nat_entry_set_slab = f2fs_kmem_cache_create("nat_entry_set",
2203 sizeof(struct nat_entry_set));
2204 if (!nat_entry_set_slab)
Markus Elfringce3e6d22014-11-24 15:52:00 +01002205 goto destroy_free_nid;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09002206 return 0;
Chao Yuaec71382014-06-24 09:18:20 +08002207
Markus Elfringce3e6d22014-11-24 15:52:00 +01002208destroy_free_nid:
Chao Yuaec71382014-06-24 09:18:20 +08002209 kmem_cache_destroy(free_nid_slab);
Markus Elfringce3e6d22014-11-24 15:52:00 +01002210destroy_nat_entry:
Chao Yuaec71382014-06-24 09:18:20 +08002211 kmem_cache_destroy(nat_entry_slab);
2212fail:
2213 return -ENOMEM;
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09002214}
2215
2216void destroy_node_manager_caches(void)
2217{
Chao Yuaec71382014-06-24 09:18:20 +08002218 kmem_cache_destroy(nat_entry_set_slab);
Jaegeuk Kime05df3b2012-11-02 17:08:50 +09002219 kmem_cache_destroy(free_nid_slab);
2220 kmem_cache_destroy(nat_entry_slab);
2221}