blob: e6c271fefacae5a514488d4c507bb870a47c7275 [file] [log] [blame]
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +09001/*
Jaegeuk Kim127e6702012-11-02 17:08:18 +09002 * fs/f2fs/checkpoint.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/bio.h>
13#include <linux/mpage.h>
14#include <linux/writeback.h>
15#include <linux/blkdev.h>
16#include <linux/f2fs_fs.h>
17#include <linux/pagevec.h>
18#include <linux/swap.h>
19
20#include "f2fs.h"
21#include "node.h"
22#include "segment.h"
Namjae Jeon2af4bd62013-04-23 18:26:54 +090023#include <trace/events/f2fs.h>
Jaegeuk Kim127e6702012-11-02 17:08:18 +090024
Jaegeuk Kim6451e042014-07-25 15:47:17 -070025static struct kmem_cache *ino_entry_slab;
Jaegeuk Kim127e6702012-11-02 17:08:18 +090026static struct kmem_cache *inode_entry_slab;
27
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +090028/*
Jaegeuk Kim127e6702012-11-02 17:08:18 +090029 * We guarantee no failure on the returned page.
30 */
31struct page *grab_meta_page(struct f2fs_sb_info *sbi, pgoff_t index)
32{
Gu Zheng9df27d92014-01-20 18:37:04 +080033 struct address_space *mapping = META_MAPPING(sbi);
Jaegeuk Kim127e6702012-11-02 17:08:18 +090034 struct page *page = NULL;
35repeat:
Jaegeuk Kimbde44682014-04-30 09:18:53 +090036 page = grab_cache_page(mapping, index);
Jaegeuk Kim127e6702012-11-02 17:08:18 +090037 if (!page) {
38 cond_resched();
39 goto repeat;
40 }
Jaegeuk Kimbde44682014-04-30 09:18:53 +090041 f2fs_wait_on_page_writeback(page, META);
Jaegeuk Kim127e6702012-11-02 17:08:18 +090042 SetPageUptodate(page);
43 return page;
44}
45
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +090046/*
Jaegeuk Kim127e6702012-11-02 17:08:18 +090047 * We guarantee no failure on the returned page.
48 */
49struct page *get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index)
50{
Gu Zheng9df27d92014-01-20 18:37:04 +080051 struct address_space *mapping = META_MAPPING(sbi);
Jaegeuk Kim127e6702012-11-02 17:08:18 +090052 struct page *page;
53repeat:
54 page = grab_cache_page(mapping, index);
55 if (!page) {
56 cond_resched();
57 goto repeat;
58 }
Jaegeuk Kim393ff912013-03-08 21:29:23 +090059 if (PageUptodate(page))
60 goto out;
Jaegeuk Kim127e6702012-11-02 17:08:18 +090061
Jaegeuk Kim93dfe2a2013-11-30 12:51:14 +090062 if (f2fs_submit_page_bio(sbi, page, index,
63 READ_SYNC | REQ_META | REQ_PRIO))
Jaegeuk Kim393ff912013-03-08 21:29:23 +090064 goto repeat;
65
66 lock_page(page);
Jaegeuk Kim6bacf522013-12-06 15:00:58 +090067 if (unlikely(page->mapping != mapping)) {
Jaegeuk Kimafcb7ca02013-04-26 11:55:17 +090068 f2fs_put_page(page, 1);
69 goto repeat;
70 }
Jaegeuk Kim393ff912013-03-08 21:29:23 +090071out:
Jaegeuk Kim127e6702012-11-02 17:08:18 +090072 return page;
73}
74
Chao Yu66b00c12014-12-08 14:59:17 +080075static inline bool is_valid_blkaddr(struct f2fs_sb_info *sbi,
76 block_t blkaddr, int type)
Chao Yu662befd2014-02-07 16:11:53 +080077{
78 switch (type) {
79 case META_NAT:
Chao Yu66b00c12014-12-08 14:59:17 +080080 break;
Chao Yu662befd2014-02-07 16:11:53 +080081 case META_SIT:
Chao Yu66b00c12014-12-08 14:59:17 +080082 if (unlikely(blkaddr >= SIT_BLK_CNT(sbi)))
83 return false;
84 break;
Chao Yu81c1a0f12014-02-27 19:12:24 +080085 case META_SSA:
Chao Yu66b00c12014-12-08 14:59:17 +080086 if (unlikely(blkaddr >= MAIN_BLKADDR(sbi) ||
87 blkaddr < SM_I(sbi)->ssa_blkaddr))
88 return false;
89 break;
Chao Yu662befd2014-02-07 16:11:53 +080090 case META_CP:
Chao Yu66b00c12014-12-08 14:59:17 +080091 if (unlikely(blkaddr >= SIT_I(sbi)->sit_base_addr ||
92 blkaddr < __start_cp_addr(sbi)))
93 return false;
94 break;
Jaegeuk Kim4c521f492014-09-11 13:49:55 -070095 case META_POR:
Chao Yu66b00c12014-12-08 14:59:17 +080096 if (unlikely(blkaddr >= MAX_BLKADDR(sbi) ||
97 blkaddr < MAIN_BLKADDR(sbi)))
98 return false;
99 break;
Chao Yu662befd2014-02-07 16:11:53 +0800100 default:
101 BUG();
102 }
Chao Yu66b00c12014-12-08 14:59:17 +0800103
104 return true;
Chao Yu662befd2014-02-07 16:11:53 +0800105}
106
107/*
Chao Yu81c1a0f12014-02-27 19:12:24 +0800108 * Readahead CP/NAT/SIT/SSA pages
Chao Yu662befd2014-02-07 16:11:53 +0800109 */
Jaegeuk Kim4c521f492014-09-11 13:49:55 -0700110int ra_meta_pages(struct f2fs_sb_info *sbi, block_t start, int nrpages, int type)
Chao Yu662befd2014-02-07 16:11:53 +0800111{
112 block_t prev_blk_addr = 0;
113 struct page *page;
Jaegeuk Kim4c521f492014-09-11 13:49:55 -0700114 block_t blkno = start;
Chao Yu662befd2014-02-07 16:11:53 +0800115
116 struct f2fs_io_info fio = {
117 .type = META,
118 .rw = READ_SYNC | REQ_META | REQ_PRIO
119 };
120
121 for (; nrpages-- > 0; blkno++) {
122 block_t blk_addr;
123
Chao Yu66b00c12014-12-08 14:59:17 +0800124 if (!is_valid_blkaddr(sbi, blkno, type))
125 goto out;
126
Chao Yu662befd2014-02-07 16:11:53 +0800127 switch (type) {
128 case META_NAT:
Chao Yu66b00c12014-12-08 14:59:17 +0800129 if (unlikely(blkno >=
130 NAT_BLOCK_OFFSET(NM_I(sbi)->max_nid)))
Chao Yu662befd2014-02-07 16:11:53 +0800131 blkno = 0;
Chao Yu66b00c12014-12-08 14:59:17 +0800132 /* get nat block addr */
Chao Yu662befd2014-02-07 16:11:53 +0800133 blk_addr = current_nat_addr(sbi,
134 blkno * NAT_ENTRY_PER_BLOCK);
135 break;
136 case META_SIT:
137 /* get sit block addr */
Chao Yu662befd2014-02-07 16:11:53 +0800138 blk_addr = current_sit_addr(sbi,
139 blkno * SIT_ENTRY_PER_BLOCK);
140 if (blkno != start && prev_blk_addr + 1 != blk_addr)
141 goto out;
142 prev_blk_addr = blk_addr;
143 break;
Chao Yu81c1a0f12014-02-27 19:12:24 +0800144 case META_SSA:
Chao Yu662befd2014-02-07 16:11:53 +0800145 case META_CP:
Jaegeuk Kim4c521f492014-09-11 13:49:55 -0700146 case META_POR:
Chao Yu662befd2014-02-07 16:11:53 +0800147 blk_addr = blkno;
148 break;
149 default:
150 BUG();
151 }
152
153 page = grab_cache_page(META_MAPPING(sbi), blk_addr);
154 if (!page)
155 continue;
156 if (PageUptodate(page)) {
Chao Yu662befd2014-02-07 16:11:53 +0800157 f2fs_put_page(page, 1);
158 continue;
159 }
160
161 f2fs_submit_page_mbio(sbi, page, blk_addr, &fio);
Chao Yu662befd2014-02-07 16:11:53 +0800162 f2fs_put_page(page, 0);
163 }
164out:
165 f2fs_submit_merged_bio(sbi, META, READ);
166 return blkno - start;
167}
168
Chao Yu635aee12014-12-08 15:02:52 +0800169void ra_meta_pages_cond(struct f2fs_sb_info *sbi, pgoff_t index)
170{
171 struct page *page;
172 bool readahead = false;
173
174 page = find_get_page(META_MAPPING(sbi), index);
175 if (!page || (page && !PageUptodate(page)))
176 readahead = true;
177 f2fs_put_page(page, 0);
178
179 if (readahead)
180 ra_meta_pages(sbi, index, MAX_BIO_BLOCKS(sbi), META_POR);
181}
182
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900183static int f2fs_write_meta_page(struct page *page,
184 struct writeback_control *wbc)
185{
Jaegeuk Kim40813632014-09-02 15:31:18 -0700186 struct f2fs_sb_info *sbi = F2FS_P_SB(page);
Jaegeuk Kim577e3492013-01-24 19:56:11 +0900187
Chao Yuecda0de2014-05-06 16:48:26 +0800188 trace_f2fs_writepage(page, META);
189
Jaegeuk Kim203681f2014-02-05 13:03:57 +0900190 if (unlikely(sbi->por_doing))
Chao Yucfb271d2013-12-05 17:15:22 +0800191 goto redirty_out;
Jaegeuk Kim857dc4e2014-11-19 11:03:34 -0800192 if (wbc->for_reclaim && page->index < GET_SUM_BLOCK(sbi, 0))
Chao Yucfb271d2013-12-05 17:15:22 +0800193 goto redirty_out;
Jaegeuk Kim1e968fd2014-08-11 16:49:25 -0700194 if (unlikely(f2fs_cp_error(sbi)))
Jaegeuk Kimcf779ca2014-08-11 18:37:46 -0700195 goto redirty_out;
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900196
Jaegeuk Kim3cb5ad12014-03-18 13:29:07 +0900197 f2fs_wait_on_page_writeback(page, META);
Jaegeuk Kim577e3492013-01-24 19:56:11 +0900198 write_meta_page(sbi, page);
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900199 dec_page_count(sbi, F2FS_DIRTY_META);
Jaegeuk Kim577e3492013-01-24 19:56:11 +0900200 unlock_page(page);
Jaegeuk Kim857dc4e2014-11-19 11:03:34 -0800201
202 if (wbc->for_reclaim)
203 f2fs_submit_merged_bio(sbi, META, WRITE);
Jaegeuk Kim577e3492013-01-24 19:56:11 +0900204 return 0;
Chao Yucfb271d2013-12-05 17:15:22 +0800205
206redirty_out:
Jaegeuk Kim76f60262014-04-15 16:04:15 +0900207 redirty_page_for_writepage(wbc, page);
Chao Yucfb271d2013-12-05 17:15:22 +0800208 return AOP_WRITEPAGE_ACTIVATE;
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900209}
210
211static int f2fs_write_meta_pages(struct address_space *mapping,
212 struct writeback_control *wbc)
213{
Jaegeuk Kim40813632014-09-02 15:31:18 -0700214 struct f2fs_sb_info *sbi = F2FS_M_SB(mapping);
Jaegeuk Kim50c8cdb2014-03-18 13:47:11 +0900215 long diff, written;
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900216
Chao Yue5748432014-05-06 16:51:24 +0800217 trace_f2fs_writepages(mapping->host, wbc, META);
218
Jaegeuk Kim5459aa92013-12-17 17:28:41 +0900219 /* collect a number of dirty meta pages and write together */
Jaegeuk Kim50c8cdb2014-03-18 13:47:11 +0900220 if (wbc->for_kupdate ||
221 get_pages(sbi, F2FS_DIRTY_META) < nr_pages_to_skip(sbi, META))
Jaegeuk Kimd3baf952014-03-18 13:43:05 +0900222 goto skip_write;
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900223
224 /* if mounting is failed, skip writing node pages */
225 mutex_lock(&sbi->cp_mutex);
Jaegeuk Kim50c8cdb2014-03-18 13:47:11 +0900226 diff = nr_pages_to_write(sbi, META, wbc);
227 written = sync_meta_pages(sbi, META, wbc->nr_to_write);
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900228 mutex_unlock(&sbi->cp_mutex);
Jaegeuk Kim50c8cdb2014-03-18 13:47:11 +0900229 wbc->nr_to_write = max((long)0, wbc->nr_to_write - written - diff);
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900230 return 0;
Jaegeuk Kimd3baf952014-03-18 13:43:05 +0900231
232skip_write:
233 wbc->pages_skipped += get_pages(sbi, F2FS_DIRTY_META);
234 return 0;
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900235}
236
237long sync_meta_pages(struct f2fs_sb_info *sbi, enum page_type type,
238 long nr_to_write)
239{
Gu Zheng9df27d92014-01-20 18:37:04 +0800240 struct address_space *mapping = META_MAPPING(sbi);
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900241 pgoff_t index = 0, end = LONG_MAX;
242 struct pagevec pvec;
243 long nwritten = 0;
244 struct writeback_control wbc = {
245 .for_reclaim = 0,
246 };
247
248 pagevec_init(&pvec, 0);
249
250 while (index <= end) {
251 int i, nr_pages;
252 nr_pages = pagevec_lookup_tag(&pvec, mapping, &index,
253 PAGECACHE_TAG_DIRTY,
254 min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1);
Chao Yucfb271d2013-12-05 17:15:22 +0800255 if (unlikely(nr_pages == 0))
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900256 break;
257
258 for (i = 0; i < nr_pages; i++) {
259 struct page *page = pvec.pages[i];
Jaegeuk Kim203681f2014-02-05 13:03:57 +0900260
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900261 lock_page(page);
Jaegeuk Kim203681f2014-02-05 13:03:57 +0900262
263 if (unlikely(page->mapping != mapping)) {
264continue_unlock:
265 unlock_page(page);
266 continue;
267 }
268 if (!PageDirty(page)) {
269 /* someone wrote it for us */
270 goto continue_unlock;
271 }
272
273 if (!clear_page_dirty_for_io(page))
274 goto continue_unlock;
275
Jaegeuk Kim577e3492013-01-24 19:56:11 +0900276 if (f2fs_write_meta_page(page, &wbc)) {
277 unlock_page(page);
278 break;
279 }
Chao Yucfb271d2013-12-05 17:15:22 +0800280 nwritten++;
281 if (unlikely(nwritten >= nr_to_write))
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900282 break;
283 }
284 pagevec_release(&pvec);
285 cond_resched();
286 }
287
288 if (nwritten)
Jaegeuk Kim458e6192013-12-11 13:54:01 +0900289 f2fs_submit_merged_bio(sbi, type, WRITE);
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900290
291 return nwritten;
292}
293
294static int f2fs_set_meta_page_dirty(struct page *page)
295{
Jaegeuk Kim26c6b882013-10-24 17:53:29 +0900296 trace_f2fs_set_page_dirty(page, META);
297
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900298 SetPageUptodate(page);
299 if (!PageDirty(page)) {
300 __set_page_dirty_nobuffers(page);
Jaegeuk Kim40813632014-09-02 15:31:18 -0700301 inc_page_count(F2FS_P_SB(page), F2FS_DIRTY_META);
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900302 return 1;
303 }
304 return 0;
305}
306
307const struct address_space_operations f2fs_meta_aops = {
308 .writepage = f2fs_write_meta_page,
309 .writepages = f2fs_write_meta_pages,
310 .set_page_dirty = f2fs_set_meta_page_dirty,
311};
312
Jaegeuk Kim6451e042014-07-25 15:47:17 -0700313static void __add_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
Jaegeuk Kim953e6cc2014-07-25 15:47:16 -0700314{
Chao Yu67298802014-11-18 11:18:36 +0800315 struct inode_management *im = &sbi->im[type];
Jaegeuk Kim39efac42014-07-24 18:15:17 -0700316 struct ino_entry *e;
317retry:
Jaegeuk Kim769ec6e2014-12-03 20:47:26 -0800318 if (radix_tree_preload(GFP_NOFS)) {
319 cond_resched();
320 goto retry;
321 }
322
Chao Yu67298802014-11-18 11:18:36 +0800323 spin_lock(&im->ino_lock);
Jaegeuk Kim953e6cc2014-07-25 15:47:16 -0700324
Chao Yu67298802014-11-18 11:18:36 +0800325 e = radix_tree_lookup(&im->ino_root, ino);
Jaegeuk Kim39efac42014-07-24 18:15:17 -0700326 if (!e) {
327 e = kmem_cache_alloc(ino_entry_slab, GFP_ATOMIC);
328 if (!e) {
Chao Yu67298802014-11-18 11:18:36 +0800329 spin_unlock(&im->ino_lock);
Jaegeuk Kim769ec6e2014-12-03 20:47:26 -0800330 radix_tree_preload_end();
Jaegeuk Kim39efac42014-07-24 18:15:17 -0700331 goto retry;
332 }
Chao Yu67298802014-11-18 11:18:36 +0800333 if (radix_tree_insert(&im->ino_root, ino, e)) {
334 spin_unlock(&im->ino_lock);
Jaegeuk Kim39efac42014-07-24 18:15:17 -0700335 kmem_cache_free(ino_entry_slab, e);
Jaegeuk Kim769ec6e2014-12-03 20:47:26 -0800336 radix_tree_preload_end();
Jaegeuk Kim39efac42014-07-24 18:15:17 -0700337 goto retry;
338 }
339 memset(e, 0, sizeof(struct ino_entry));
340 e->ino = ino;
341
Chao Yu67298802014-11-18 11:18:36 +0800342 list_add_tail(&e->list, &im->ino_list);
Jaegeuk Kim8c402942014-11-06 15:16:04 -0800343 if (type != ORPHAN_INO)
Chao Yu67298802014-11-18 11:18:36 +0800344 im->ino_num++;
Jaegeuk Kim39efac42014-07-24 18:15:17 -0700345 }
Chao Yu67298802014-11-18 11:18:36 +0800346 spin_unlock(&im->ino_lock);
Jaegeuk Kim769ec6e2014-12-03 20:47:26 -0800347 radix_tree_preload_end();
Jaegeuk Kim953e6cc2014-07-25 15:47:16 -0700348}
349
Jaegeuk Kim6451e042014-07-25 15:47:17 -0700350static void __remove_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
Jaegeuk Kim953e6cc2014-07-25 15:47:16 -0700351{
Chao Yu67298802014-11-18 11:18:36 +0800352 struct inode_management *im = &sbi->im[type];
Jaegeuk Kim6451e042014-07-25 15:47:17 -0700353 struct ino_entry *e;
Jaegeuk Kim953e6cc2014-07-25 15:47:16 -0700354
Chao Yu67298802014-11-18 11:18:36 +0800355 spin_lock(&im->ino_lock);
356 e = radix_tree_lookup(&im->ino_root, ino);
Jaegeuk Kim39efac42014-07-24 18:15:17 -0700357 if (e) {
358 list_del(&e->list);
Chao Yu67298802014-11-18 11:18:36 +0800359 radix_tree_delete(&im->ino_root, ino);
360 im->ino_num--;
361 spin_unlock(&im->ino_lock);
Jaegeuk Kim39efac42014-07-24 18:15:17 -0700362 kmem_cache_free(ino_entry_slab, e);
363 return;
Jaegeuk Kim953e6cc2014-07-25 15:47:16 -0700364 }
Chao Yu67298802014-11-18 11:18:36 +0800365 spin_unlock(&im->ino_lock);
Jaegeuk Kim953e6cc2014-07-25 15:47:16 -0700366}
367
Jaegeuk Kimfff04f92014-07-25 07:40:59 -0700368void add_dirty_inode(struct f2fs_sb_info *sbi, nid_t ino, int type)
369{
370 /* add new dirty ino entry into list */
371 __add_ino_entry(sbi, ino, type);
372}
373
374void remove_dirty_inode(struct f2fs_sb_info *sbi, nid_t ino, int type)
375{
376 /* remove dirty ino entry from list */
377 __remove_ino_entry(sbi, ino, type);
378}
379
380/* mode should be APPEND_INO or UPDATE_INO */
381bool exist_written_data(struct f2fs_sb_info *sbi, nid_t ino, int mode)
382{
Chao Yu67298802014-11-18 11:18:36 +0800383 struct inode_management *im = &sbi->im[mode];
Jaegeuk Kimfff04f92014-07-25 07:40:59 -0700384 struct ino_entry *e;
Chao Yu67298802014-11-18 11:18:36 +0800385
386 spin_lock(&im->ino_lock);
387 e = radix_tree_lookup(&im->ino_root, ino);
388 spin_unlock(&im->ino_lock);
Jaegeuk Kimfff04f92014-07-25 07:40:59 -0700389 return e ? true : false;
390}
391
Jaegeuk Kim6f12ac22014-08-19 09:48:22 -0700392void release_dirty_inode(struct f2fs_sb_info *sbi)
Jaegeuk Kimfff04f92014-07-25 07:40:59 -0700393{
394 struct ino_entry *e, *tmp;
395 int i;
396
397 for (i = APPEND_INO; i <= UPDATE_INO; i++) {
Chao Yu67298802014-11-18 11:18:36 +0800398 struct inode_management *im = &sbi->im[i];
399
400 spin_lock(&im->ino_lock);
401 list_for_each_entry_safe(e, tmp, &im->ino_list, list) {
Jaegeuk Kimfff04f92014-07-25 07:40:59 -0700402 list_del(&e->list);
Chao Yu67298802014-11-18 11:18:36 +0800403 radix_tree_delete(&im->ino_root, e->ino);
Jaegeuk Kimfff04f92014-07-25 07:40:59 -0700404 kmem_cache_free(ino_entry_slab, e);
Chao Yu67298802014-11-18 11:18:36 +0800405 im->ino_num--;
Jaegeuk Kimfff04f92014-07-25 07:40:59 -0700406 }
Chao Yu67298802014-11-18 11:18:36 +0800407 spin_unlock(&im->ino_lock);
Jaegeuk Kimfff04f92014-07-25 07:40:59 -0700408 }
409}
410
Jaegeuk Kimcbd56e72013-07-30 11:36:53 +0900411int acquire_orphan_inode(struct f2fs_sb_info *sbi)
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900412{
Chao Yu67298802014-11-18 11:18:36 +0800413 struct inode_management *im = &sbi->im[ORPHAN_INO];
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900414 int err = 0;
415
Chao Yu67298802014-11-18 11:18:36 +0800416 spin_lock(&im->ino_lock);
417 if (unlikely(im->ino_num >= sbi->max_orphans))
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900418 err = -ENOSPC;
Jaegeuk Kimcbd56e72013-07-30 11:36:53 +0900419 else
Chao Yu67298802014-11-18 11:18:36 +0800420 im->ino_num++;
421 spin_unlock(&im->ino_lock);
Gu Zheng0d47c1a2013-12-26 18:24:19 +0800422
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900423 return err;
424}
425
Jaegeuk Kimcbd56e72013-07-30 11:36:53 +0900426void release_orphan_inode(struct f2fs_sb_info *sbi)
427{
Chao Yu67298802014-11-18 11:18:36 +0800428 struct inode_management *im = &sbi->im[ORPHAN_INO];
429
430 spin_lock(&im->ino_lock);
431 f2fs_bug_on(sbi, im->ino_num == 0);
432 im->ino_num--;
433 spin_unlock(&im->ino_lock);
Jaegeuk Kimcbd56e72013-07-30 11:36:53 +0900434}
435
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900436void add_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
437{
Jaegeuk Kim39efac42014-07-24 18:15:17 -0700438 /* add new orphan ino entry into list */
Jaegeuk Kim6451e042014-07-25 15:47:17 -0700439 __add_ino_entry(sbi, ino, ORPHAN_INO);
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900440}
441
442void remove_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
443{
Jaegeuk Kim953e6cc2014-07-25 15:47:16 -0700444 /* remove orphan entry from orphan list */
Jaegeuk Kim6451e042014-07-25 15:47:17 -0700445 __remove_ino_entry(sbi, ino, ORPHAN_INO);
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900446}
447
448static void recover_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
449{
450 struct inode *inode = f2fs_iget(sbi->sb, ino);
Jaegeuk Kim9850cf42014-09-02 15:52:58 -0700451 f2fs_bug_on(sbi, IS_ERR(inode));
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900452 clear_nlink(inode);
453
454 /* truncate all the data during iput */
455 iput(inode);
456}
457
Chao Yu8f99a942013-11-28 15:43:43 +0800458void recover_orphan_inodes(struct f2fs_sb_info *sbi)
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900459{
460 block_t start_blk, orphan_blkaddr, i, j;
461
Jaegeuk Kim25ca9232012-11-28 16:12:41 +0900462 if (!is_set_ckpt_flags(F2FS_CKPT(sbi), CP_ORPHAN_PRESENT_FLAG))
Chao Yu8f99a942013-11-28 15:43:43 +0800463 return;
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900464
Haicheng Liaabe5132013-10-23 12:39:32 +0800465 sbi->por_doing = true;
Changman Lee1dbe4152014-05-12 12:27:43 +0900466
467 start_blk = __start_cp_addr(sbi) + 1 +
468 le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_payload);
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900469 orphan_blkaddr = __start_sum_addr(sbi) - 1;
470
Chao Yu662befd2014-02-07 16:11:53 +0800471 ra_meta_pages(sbi, start_blk, orphan_blkaddr, META_CP);
472
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900473 for (i = 0; i < orphan_blkaddr; i++) {
474 struct page *page = get_meta_page(sbi, start_blk + i);
475 struct f2fs_orphan_block *orphan_blk;
476
477 orphan_blk = (struct f2fs_orphan_block *)page_address(page);
478 for (j = 0; j < le32_to_cpu(orphan_blk->entry_count); j++) {
479 nid_t ino = le32_to_cpu(orphan_blk->ino[j]);
480 recover_orphan_inode(sbi, ino);
481 }
482 f2fs_put_page(page, 1);
483 }
484 /* clear Orphan Flag */
Jaegeuk Kim25ca9232012-11-28 16:12:41 +0900485 clear_ckpt_flags(F2FS_CKPT(sbi), CP_ORPHAN_PRESENT_FLAG);
Haicheng Liaabe5132013-10-23 12:39:32 +0800486 sbi->por_doing = false;
Chao Yu8f99a942013-11-28 15:43:43 +0800487 return;
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900488}
489
490static void write_orphan_inodes(struct f2fs_sb_info *sbi, block_t start_blk)
491{
Gu Zheng502c6e02013-11-19 18:03:58 +0800492 struct list_head *head;
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900493 struct f2fs_orphan_block *orphan_blk = NULL;
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900494 unsigned int nentries = 0;
Gu Zheng45319292014-01-10 18:09:02 +0800495 unsigned short index;
Jaegeuk Kim8c402942014-11-06 15:16:04 -0800496 unsigned short orphan_blocks;
Gu Zheng45319292014-01-10 18:09:02 +0800497 struct page *page = NULL;
Jaegeuk Kim6451e042014-07-25 15:47:17 -0700498 struct ino_entry *orphan = NULL;
Chao Yu67298802014-11-18 11:18:36 +0800499 struct inode_management *im = &sbi->im[ORPHAN_INO];
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900500
Chao Yu67298802014-11-18 11:18:36 +0800501 orphan_blocks = GET_ORPHAN_BLOCKS(im->ino_num);
Jaegeuk Kim8c402942014-11-06 15:16:04 -0800502
Gu Zheng45319292014-01-10 18:09:02 +0800503 for (index = 0; index < orphan_blocks; index++)
Gu Zheng63f53842014-01-20 18:37:30 +0800504 grab_meta_page(sbi, start_blk + index);
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900505
Gu Zheng45319292014-01-10 18:09:02 +0800506 index = 1;
Chao Yu67298802014-11-18 11:18:36 +0800507 spin_lock(&im->ino_lock);
508 head = &im->ino_list;
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900509
510 /* loop for each orphan inode entry and write them in Jornal block */
Gu Zheng502c6e02013-11-19 18:03:58 +0800511 list_for_each_entry(orphan, head, list) {
512 if (!page) {
Gu Zheng63f53842014-01-20 18:37:30 +0800513 page = find_get_page(META_MAPPING(sbi), start_blk++);
Jaegeuk Kim9850cf42014-09-02 15:52:58 -0700514 f2fs_bug_on(sbi, !page);
Gu Zheng502c6e02013-11-19 18:03:58 +0800515 orphan_blk =
516 (struct f2fs_orphan_block *)page_address(page);
517 memset(orphan_blk, 0, sizeof(*orphan_blk));
Gu Zheng63f53842014-01-20 18:37:30 +0800518 f2fs_put_page(page, 0);
Gu Zheng502c6e02013-11-19 18:03:58 +0800519 }
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900520
Gu Zheng36795562013-11-26 16:44:16 +0800521 orphan_blk->ino[nentries++] = cpu_to_le32(orphan->ino);
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900522
Gu Zheng36795562013-11-26 16:44:16 +0800523 if (nentries == F2FS_ORPHANS_PER_BLOCK) {
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900524 /*
525 * an orphan block is full of 1020 entries,
526 * then we need to flush current orphan blocks
527 * and bring another one in memory
528 */
529 orphan_blk->blk_addr = cpu_to_le16(index);
530 orphan_blk->blk_count = cpu_to_le16(orphan_blocks);
531 orphan_blk->entry_count = cpu_to_le32(nentries);
532 set_page_dirty(page);
533 f2fs_put_page(page, 1);
534 index++;
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900535 nentries = 0;
536 page = NULL;
537 }
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900538 }
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900539
Gu Zheng502c6e02013-11-19 18:03:58 +0800540 if (page) {
541 orphan_blk->blk_addr = cpu_to_le16(index);
542 orphan_blk->blk_count = cpu_to_le16(orphan_blocks);
543 orphan_blk->entry_count = cpu_to_le32(nentries);
544 set_page_dirty(page);
545 f2fs_put_page(page, 1);
546 }
547
Chao Yu67298802014-11-18 11:18:36 +0800548 spin_unlock(&im->ino_lock);
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900549}
550
551static struct page *validate_checkpoint(struct f2fs_sb_info *sbi,
552 block_t cp_addr, unsigned long long *version)
553{
554 struct page *cp_page_1, *cp_page_2 = NULL;
555 unsigned long blk_size = sbi->blocksize;
556 struct f2fs_checkpoint *cp_block;
557 unsigned long long cur_version = 0, pre_version = 0;
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900558 size_t crc_offset;
Jaegeuk Kim7e586fa2013-06-19 20:47:19 +0900559 __u32 crc = 0;
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900560
561 /* Read the 1st cp block in this CP pack */
562 cp_page_1 = get_meta_page(sbi, cp_addr);
563
564 /* get the version number */
565 cp_block = (struct f2fs_checkpoint *)page_address(cp_page_1);
566 crc_offset = le32_to_cpu(cp_block->checksum_offset);
567 if (crc_offset >= blk_size)
568 goto invalid_cp1;
569
Jaegeuk Kim7e586fa2013-06-19 20:47:19 +0900570 crc = le32_to_cpu(*((__u32 *)((unsigned char *)cp_block + crc_offset)));
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900571 if (!f2fs_crc_valid(crc, cp_block, crc_offset))
572 goto invalid_cp1;
573
Jaegeuk Kimd71b5562013-08-09 15:03:21 +0900574 pre_version = cur_cp_version(cp_block);
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900575
576 /* Read the 2nd cp block in this CP pack */
Jaegeuk Kim25ca9232012-11-28 16:12:41 +0900577 cp_addr += le32_to_cpu(cp_block->cp_pack_total_block_count) - 1;
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900578 cp_page_2 = get_meta_page(sbi, cp_addr);
579
580 cp_block = (struct f2fs_checkpoint *)page_address(cp_page_2);
581 crc_offset = le32_to_cpu(cp_block->checksum_offset);
582 if (crc_offset >= blk_size)
583 goto invalid_cp2;
584
Jaegeuk Kim7e586fa2013-06-19 20:47:19 +0900585 crc = le32_to_cpu(*((__u32 *)((unsigned char *)cp_block + crc_offset)));
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900586 if (!f2fs_crc_valid(crc, cp_block, crc_offset))
587 goto invalid_cp2;
588
Jaegeuk Kimd71b5562013-08-09 15:03:21 +0900589 cur_version = cur_cp_version(cp_block);
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900590
591 if (cur_version == pre_version) {
592 *version = cur_version;
593 f2fs_put_page(cp_page_2, 1);
594 return cp_page_1;
595 }
596invalid_cp2:
597 f2fs_put_page(cp_page_2, 1);
598invalid_cp1:
599 f2fs_put_page(cp_page_1, 1);
600 return NULL;
601}
602
603int get_valid_checkpoint(struct f2fs_sb_info *sbi)
604{
605 struct f2fs_checkpoint *cp_block;
606 struct f2fs_super_block *fsb = sbi->raw_super;
607 struct page *cp1, *cp2, *cur_page;
608 unsigned long blk_size = sbi->blocksize;
609 unsigned long long cp1_version = 0, cp2_version = 0;
610 unsigned long long cp_start_blk_no;
Changman Lee1dbe4152014-05-12 12:27:43 +0900611 unsigned int cp_blks = 1 + le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_payload);
612 block_t cp_blk_no;
613 int i;
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900614
Changman Lee1dbe4152014-05-12 12:27:43 +0900615 sbi->ckpt = kzalloc(cp_blks * blk_size, GFP_KERNEL);
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900616 if (!sbi->ckpt)
617 return -ENOMEM;
618 /*
619 * Finding out valid cp block involves read both
620 * sets( cp pack1 and cp pack 2)
621 */
622 cp_start_blk_no = le32_to_cpu(fsb->cp_blkaddr);
623 cp1 = validate_checkpoint(sbi, cp_start_blk_no, &cp1_version);
624
625 /* The second checkpoint pack should start at the next segment */
Jaegeuk Kimf9a4e6d2013-11-28 12:44:05 +0900626 cp_start_blk_no += ((unsigned long long)1) <<
627 le32_to_cpu(fsb->log_blocks_per_seg);
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900628 cp2 = validate_checkpoint(sbi, cp_start_blk_no, &cp2_version);
629
630 if (cp1 && cp2) {
631 if (ver_after(cp2_version, cp1_version))
632 cur_page = cp2;
633 else
634 cur_page = cp1;
635 } else if (cp1) {
636 cur_page = cp1;
637 } else if (cp2) {
638 cur_page = cp2;
639 } else {
640 goto fail_no_cp;
641 }
642
643 cp_block = (struct f2fs_checkpoint *)page_address(cur_page);
644 memcpy(sbi->ckpt, cp_block, blk_size);
645
Changman Lee1dbe4152014-05-12 12:27:43 +0900646 if (cp_blks <= 1)
647 goto done;
648
649 cp_blk_no = le32_to_cpu(fsb->cp_blkaddr);
650 if (cur_page == cp2)
651 cp_blk_no += 1 << le32_to_cpu(fsb->log_blocks_per_seg);
652
653 for (i = 1; i < cp_blks; i++) {
654 void *sit_bitmap_ptr;
655 unsigned char *ckpt = (unsigned char *)sbi->ckpt;
656
657 cur_page = get_meta_page(sbi, cp_blk_no + i);
658 sit_bitmap_ptr = page_address(cur_page);
659 memcpy(ckpt + i * blk_size, sit_bitmap_ptr, blk_size);
660 f2fs_put_page(cur_page, 1);
661 }
662done:
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900663 f2fs_put_page(cp1, 1);
664 f2fs_put_page(cp2, 1);
665 return 0;
666
667fail_no_cp:
668 kfree(sbi->ckpt);
669 return -EINVAL;
670}
671
Jaegeuk Kim5deb8262013-06-05 17:42:45 +0900672static int __add_dirty_inode(struct inode *inode, struct dir_inode_entry *new)
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900673{
Jaegeuk Kim40813632014-09-02 15:31:18 -0700674 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900675
Jaegeuk Kimed57c272014-04-15 11:19:28 +0900676 if (is_inode_flag_set(F2FS_I(inode), FI_DIRTY_DIR))
677 return -EEXIST;
Chao Yu2d7b8222014-03-29 11:33:17 +0800678
Jaegeuk Kimed57c272014-04-15 11:19:28 +0900679 set_inode_flag(F2FS_I(inode), FI_DIRTY_DIR);
680 F2FS_I(inode)->dirty_dir = new;
681 list_add_tail(&new->list, &sbi->dir_inode_list);
Jaegeuk Kimdcdfff62013-10-22 20:56:10 +0900682 stat_inc_dirty_dir(sbi);
Jaegeuk Kim5deb8262013-06-05 17:42:45 +0900683 return 0;
684}
685
Jaegeuk Kima7ffdbe2014-09-12 15:53:45 -0700686void update_dirty_page(struct inode *inode, struct page *page)
Jaegeuk Kim5deb8262013-06-05 17:42:45 +0900687{
Jaegeuk Kim40813632014-09-02 15:31:18 -0700688 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
Jaegeuk Kim5deb8262013-06-05 17:42:45 +0900689 struct dir_inode_entry *new;
Chao Yucf0ee0f2014-04-02 08:55:00 +0800690 int ret = 0;
Jaegeuk Kim5deb8262013-06-05 17:42:45 +0900691
Jaegeuk Kima7ffdbe2014-09-12 15:53:45 -0700692 if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode))
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900693 return;
Gu Zheng7bd59382013-10-22 14:52:26 +0800694
Jaegeuk Kima7ffdbe2014-09-12 15:53:45 -0700695 if (!S_ISDIR(inode->i_mode)) {
696 inode_inc_dirty_pages(inode);
697 goto out;
698 }
699
Gu Zheng7bd59382013-10-22 14:52:26 +0800700 new = f2fs_kmem_cache_alloc(inode_entry_slab, GFP_NOFS);
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900701 new->inode = inode;
702 INIT_LIST_HEAD(&new->list);
703
704 spin_lock(&sbi->dir_inode_lock);
Chao Yucf0ee0f2014-04-02 08:55:00 +0800705 ret = __add_dirty_inode(inode, new);
Jaegeuk Kima7ffdbe2014-09-12 15:53:45 -0700706 inode_inc_dirty_pages(inode);
Jaegeuk Kim5deb8262013-06-05 17:42:45 +0900707 spin_unlock(&sbi->dir_inode_lock);
Chao Yucf0ee0f2014-04-02 08:55:00 +0800708
709 if (ret)
710 kmem_cache_free(inode_entry_slab, new);
Jaegeuk Kima7ffdbe2014-09-12 15:53:45 -0700711out:
712 SetPagePrivate(page);
Jaegeuk Kim5deb8262013-06-05 17:42:45 +0900713}
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900714
Jaegeuk Kim5deb8262013-06-05 17:42:45 +0900715void add_dirty_dir_inode(struct inode *inode)
716{
Jaegeuk Kim40813632014-09-02 15:31:18 -0700717 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
Gu Zheng7bd59382013-10-22 14:52:26 +0800718 struct dir_inode_entry *new =
719 f2fs_kmem_cache_alloc(inode_entry_slab, GFP_NOFS);
Chao Yucf0ee0f2014-04-02 08:55:00 +0800720 int ret = 0;
Gu Zheng7bd59382013-10-22 14:52:26 +0800721
Jaegeuk Kim5deb8262013-06-05 17:42:45 +0900722 new->inode = inode;
723 INIT_LIST_HEAD(&new->list);
724
725 spin_lock(&sbi->dir_inode_lock);
Chao Yucf0ee0f2014-04-02 08:55:00 +0800726 ret = __add_dirty_inode(inode, new);
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900727 spin_unlock(&sbi->dir_inode_lock);
Chao Yucf0ee0f2014-04-02 08:55:00 +0800728
729 if (ret)
730 kmem_cache_free(inode_entry_slab, new);
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900731}
732
733void remove_dirty_dir_inode(struct inode *inode)
734{
Jaegeuk Kim40813632014-09-02 15:31:18 -0700735 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
Chao Yu2d7b8222014-03-29 11:33:17 +0800736 struct dir_inode_entry *entry;
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900737
738 if (!S_ISDIR(inode->i_mode))
739 return;
740
741 spin_lock(&sbi->dir_inode_lock);
Jaegeuk Kima7ffdbe2014-09-12 15:53:45 -0700742 if (get_dirty_pages(inode) ||
Jaegeuk Kimed57c272014-04-15 11:19:28 +0900743 !is_inode_flag_set(F2FS_I(inode), FI_DIRTY_DIR)) {
Jaegeuk Kim3b10b1f2013-05-27 10:32:01 +0900744 spin_unlock(&sbi->dir_inode_lock);
745 return;
746 }
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900747
Jaegeuk Kimed57c272014-04-15 11:19:28 +0900748 entry = F2FS_I(inode)->dirty_dir;
749 list_del(&entry->list);
750 F2FS_I(inode)->dirty_dir = NULL;
751 clear_inode_flag(F2FS_I(inode), FI_DIRTY_DIR);
752 stat_dec_dirty_dir(sbi);
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900753 spin_unlock(&sbi->dir_inode_lock);
Jaegeuk Kimed57c272014-04-15 11:19:28 +0900754 kmem_cache_free(inode_entry_slab, entry);
Jaegeuk Kim74d0b912013-05-15 16:40:02 +0900755
756 /* Only from the recovery routine */
Jaegeuk Kimafc3eda2013-05-28 09:59:27 +0900757 if (is_inode_flag_set(F2FS_I(inode), FI_DELAY_IPUT)) {
758 clear_inode_flag(F2FS_I(inode), FI_DELAY_IPUT);
Jaegeuk Kim74d0b912013-05-15 16:40:02 +0900759 iput(inode);
Jaegeuk Kimafc3eda2013-05-28 09:59:27 +0900760 }
Jaegeuk Kim74d0b912013-05-15 16:40:02 +0900761}
762
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900763void sync_dirty_dir_inodes(struct f2fs_sb_info *sbi)
764{
Gu Zhengce3b7d82013-11-19 18:03:47 +0800765 struct list_head *head;
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900766 struct dir_inode_entry *entry;
767 struct inode *inode;
768retry:
Jaegeuk Kimaf41d3e2014-10-17 14:14:16 -0700769 if (unlikely(f2fs_cp_error(sbi)))
770 return;
771
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900772 spin_lock(&sbi->dir_inode_lock);
Gu Zhengce3b7d82013-11-19 18:03:47 +0800773
774 head = &sbi->dir_inode_list;
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900775 if (list_empty(head)) {
776 spin_unlock(&sbi->dir_inode_lock);
777 return;
778 }
779 entry = list_entry(head->next, struct dir_inode_entry, list);
780 inode = igrab(entry->inode);
781 spin_unlock(&sbi->dir_inode_lock);
782 if (inode) {
Jaegeuk Kim87d6f892014-03-18 12:40:49 +0900783 filemap_fdatawrite(inode->i_mapping);
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900784 iput(inode);
785 } else {
786 /*
787 * We should submit bio, since it exists several
788 * wribacking dentry pages in the freeing inode.
789 */
Jaegeuk Kim458e6192013-12-11 13:54:01 +0900790 f2fs_submit_merged_bio(sbi, DATA, WRITE);
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900791 }
792 goto retry;
793}
794
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +0900795/*
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900796 * Freeze all the FS-operations for checkpoint.
797 */
Jaegeuk Kimcf779ca2014-08-11 18:37:46 -0700798static int block_operations(struct f2fs_sb_info *sbi)
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900799{
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900800 struct writeback_control wbc = {
801 .sync_mode = WB_SYNC_ALL,
802 .nr_to_write = LONG_MAX,
803 .for_reclaim = 0,
804 };
Jaegeuk Kimc718379b2013-04-24 13:19:56 +0900805 struct blk_plug plug;
Jaegeuk Kimcf779ca2014-08-11 18:37:46 -0700806 int err = 0;
Jaegeuk Kimc718379b2013-04-24 13:19:56 +0900807
808 blk_start_plug(&plug);
809
Jaegeuk Kim39936832012-11-22 16:21:29 +0900810retry_flush_dents:
Gu Zhenge4795562013-09-27 18:08:30 +0800811 f2fs_lock_all(sbi);
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900812 /* write all the dirty dentry pages */
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900813 if (get_pages(sbi, F2FS_DIRTY_DENTS)) {
Gu Zhenge4795562013-09-27 18:08:30 +0800814 f2fs_unlock_all(sbi);
Jaegeuk Kim39936832012-11-22 16:21:29 +0900815 sync_dirty_dir_inodes(sbi);
Jaegeuk Kimcf779ca2014-08-11 18:37:46 -0700816 if (unlikely(f2fs_cp_error(sbi))) {
817 err = -EIO;
818 goto out;
819 }
Jaegeuk Kim39936832012-11-22 16:21:29 +0900820 goto retry_flush_dents;
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900821 }
822
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900823 /*
arter97e1c42042014-08-06 23:22:50 +0900824 * POR: we should ensure that there are no dirty node pages
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900825 * until finishing nat/sit flush.
826 */
Jaegeuk Kim39936832012-11-22 16:21:29 +0900827retry_flush_nodes:
Chao Yub3582c62014-07-03 18:58:39 +0800828 down_write(&sbi->node_write);
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900829
830 if (get_pages(sbi, F2FS_DIRTY_NODES)) {
Chao Yub3582c62014-07-03 18:58:39 +0800831 up_write(&sbi->node_write);
Jaegeuk Kim39936832012-11-22 16:21:29 +0900832 sync_node_pages(sbi, 0, &wbc);
Jaegeuk Kimcf779ca2014-08-11 18:37:46 -0700833 if (unlikely(f2fs_cp_error(sbi))) {
834 f2fs_unlock_all(sbi);
835 err = -EIO;
836 goto out;
837 }
Jaegeuk Kim39936832012-11-22 16:21:29 +0900838 goto retry_flush_nodes;
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900839 }
Jaegeuk Kimcf779ca2014-08-11 18:37:46 -0700840out:
Jaegeuk Kimc718379b2013-04-24 13:19:56 +0900841 blk_finish_plug(&plug);
Jaegeuk Kimcf779ca2014-08-11 18:37:46 -0700842 return err;
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900843}
844
845static void unblock_operations(struct f2fs_sb_info *sbi)
846{
Chao Yub3582c62014-07-03 18:58:39 +0800847 up_write(&sbi->node_write);
Gu Zhenge4795562013-09-27 18:08:30 +0800848 f2fs_unlock_all(sbi);
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900849}
850
Changman Leefb51b5e2013-11-07 12:48:25 +0900851static void wait_on_all_pages_writeback(struct f2fs_sb_info *sbi)
852{
853 DEFINE_WAIT(wait);
854
855 for (;;) {
856 prepare_to_wait(&sbi->cp_wait, &wait, TASK_UNINTERRUPTIBLE);
857
858 if (!get_pages(sbi, F2FS_WRITEBACK))
859 break;
860
861 io_schedule();
862 }
863 finish_wait(&sbi->cp_wait, &wait);
864}
865
Jaegeuk Kim75ab4cb2014-09-20 21:57:51 -0700866static void do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900867{
868 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
Jaegeuk Kimcf2271e2014-07-25 15:47:25 -0700869 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_WARM_NODE);
Huang Ying77041822014-09-12 20:19:48 +0800870 struct f2fs_nm_info *nm_i = NM_I(sbi);
Chao Yu67298802014-11-18 11:18:36 +0800871 unsigned long orphan_num = sbi->im[ORPHAN_INO].ino_num;
Huang Ying77041822014-09-12 20:19:48 +0800872 nid_t last_nid = nm_i->next_scan_nid;
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900873 block_t start_blk;
874 struct page *cp_page;
875 unsigned int data_sum_blocks, orphan_blocks;
Jaegeuk Kim7e586fa2013-06-19 20:47:19 +0900876 __u32 crc32 = 0;
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900877 void *kaddr;
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900878 int i;
Changman Lee1dbe4152014-05-12 12:27:43 +0900879 int cp_payload_blks = le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_payload);
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900880
Jaegeuk Kim1e87a782014-04-15 13:57:55 +0900881 /*
882 * This avoids to conduct wrong roll-forward operations and uses
883 * metapages, so should be called prior to sync_meta_pages below.
884 */
Jaegeuk Kimcf2271e2014-07-25 15:47:25 -0700885 discard_next_dnode(sbi, NEXT_FREE_BLKADDR(sbi, curseg));
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900886
887 /* Flush all the NAT/SIT pages */
Jaegeuk Kimcf779ca2014-08-11 18:37:46 -0700888 while (get_pages(sbi, F2FS_DIRTY_META)) {
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900889 sync_meta_pages(sbi, META, LONG_MAX);
Jaegeuk Kimcf779ca2014-08-11 18:37:46 -0700890 if (unlikely(f2fs_cp_error(sbi)))
891 return;
892 }
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900893
894 next_free_nid(sbi, &last_nid);
895
896 /*
897 * modify checkpoint
898 * version number is already updated
899 */
900 ckpt->elapsed_time = cpu_to_le64(get_mtime(sbi));
901 ckpt->valid_block_count = cpu_to_le64(valid_user_blocks(sbi));
902 ckpt->free_segment_count = cpu_to_le32(free_segments(sbi));
Chao Yub5b82202014-08-22 16:17:38 +0800903 for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900904 ckpt->cur_node_segno[i] =
905 cpu_to_le32(curseg_segno(sbi, i + CURSEG_HOT_NODE));
906 ckpt->cur_node_blkoff[i] =
907 cpu_to_le16(curseg_blkoff(sbi, i + CURSEG_HOT_NODE));
908 ckpt->alloc_type[i + CURSEG_HOT_NODE] =
909 curseg_alloc_type(sbi, i + CURSEG_HOT_NODE);
910 }
Chao Yub5b82202014-08-22 16:17:38 +0800911 for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900912 ckpt->cur_data_segno[i] =
913 cpu_to_le32(curseg_segno(sbi, i + CURSEG_HOT_DATA));
914 ckpt->cur_data_blkoff[i] =
915 cpu_to_le16(curseg_blkoff(sbi, i + CURSEG_HOT_DATA));
916 ckpt->alloc_type[i + CURSEG_HOT_DATA] =
917 curseg_alloc_type(sbi, i + CURSEG_HOT_DATA);
918 }
919
920 ckpt->valid_node_count = cpu_to_le32(valid_node_count(sbi));
921 ckpt->valid_inode_count = cpu_to_le32(valid_inode_count(sbi));
922 ckpt->next_free_nid = cpu_to_le32(last_nid);
923
924 /* 2 cp + n data seg summary + orphan inode blocks */
925 data_sum_blocks = npages_for_summary_flush(sbi);
Chao Yub5b82202014-08-22 16:17:38 +0800926 if (data_sum_blocks < NR_CURSEG_DATA_TYPE)
Jaegeuk Kim25ca9232012-11-28 16:12:41 +0900927 set_ckpt_flags(ckpt, CP_COMPACT_SUM_FLAG);
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900928 else
Jaegeuk Kim25ca9232012-11-28 16:12:41 +0900929 clear_ckpt_flags(ckpt, CP_COMPACT_SUM_FLAG);
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900930
Chao Yu67298802014-11-18 11:18:36 +0800931 orphan_blocks = GET_ORPHAN_BLOCKS(orphan_num);
Changman Lee1dbe4152014-05-12 12:27:43 +0900932 ckpt->cp_pack_start_sum = cpu_to_le32(1 + cp_payload_blks +
933 orphan_blocks);
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900934
Jaegeuk Kim75ab4cb2014-09-20 21:57:51 -0700935 if (cpc->reason == CP_UMOUNT) {
Jaegeuk Kim25ca9232012-11-28 16:12:41 +0900936 set_ckpt_flags(ckpt, CP_UMOUNT_FLAG);
Chao Yub5b82202014-08-22 16:17:38 +0800937 ckpt->cp_pack_total_block_count = cpu_to_le32(F2FS_CP_PACKS+
Changman Lee1dbe4152014-05-12 12:27:43 +0900938 cp_payload_blks + data_sum_blocks +
939 orphan_blocks + NR_CURSEG_NODE_TYPE);
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900940 } else {
Jaegeuk Kim25ca9232012-11-28 16:12:41 +0900941 clear_ckpt_flags(ckpt, CP_UMOUNT_FLAG);
Chao Yub5b82202014-08-22 16:17:38 +0800942 ckpt->cp_pack_total_block_count = cpu_to_le32(F2FS_CP_PACKS +
Changman Lee1dbe4152014-05-12 12:27:43 +0900943 cp_payload_blks + data_sum_blocks +
944 orphan_blocks);
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900945 }
946
Chao Yu67298802014-11-18 11:18:36 +0800947 if (orphan_num)
Jaegeuk Kim25ca9232012-11-28 16:12:41 +0900948 set_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG);
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900949 else
Jaegeuk Kim25ca9232012-11-28 16:12:41 +0900950 clear_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG);
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900951
Jaegeuk Kim2ae4c672014-09-02 15:43:52 -0700952 if (sbi->need_fsck)
953 set_ckpt_flags(ckpt, CP_FSCK_FLAG);
954
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900955 /* update SIT/NAT bitmap */
956 get_sit_bitmap(sbi, __bitmap_ptr(sbi, SIT_BITMAP));
957 get_nat_bitmap(sbi, __bitmap_ptr(sbi, NAT_BITMAP));
958
959 crc32 = f2fs_crc32(ckpt, le32_to_cpu(ckpt->checksum_offset));
Jaegeuk Kim7e586fa2013-06-19 20:47:19 +0900960 *((__le32 *)((unsigned char *)ckpt +
961 le32_to_cpu(ckpt->checksum_offset)))
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900962 = cpu_to_le32(crc32);
963
964 start_blk = __start_cp_addr(sbi);
965
966 /* write out checkpoint buffer at block 0 */
967 cp_page = grab_meta_page(sbi, start_blk++);
968 kaddr = page_address(cp_page);
969 memcpy(kaddr, ckpt, (1 << sbi->log_blocksize));
970 set_page_dirty(cp_page);
971 f2fs_put_page(cp_page, 1);
972
Changman Lee1dbe4152014-05-12 12:27:43 +0900973 for (i = 1; i < 1 + cp_payload_blks; i++) {
974 cp_page = grab_meta_page(sbi, start_blk++);
975 kaddr = page_address(cp_page);
976 memcpy(kaddr, (char *)ckpt + i * F2FS_BLKSIZE,
977 (1 << sbi->log_blocksize));
978 set_page_dirty(cp_page);
979 f2fs_put_page(cp_page, 1);
980 }
981
Chao Yu67298802014-11-18 11:18:36 +0800982 if (orphan_num) {
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900983 write_orphan_inodes(sbi, start_blk);
984 start_blk += orphan_blocks;
985 }
986
987 write_data_summaries(sbi, start_blk);
988 start_blk += data_sum_blocks;
Jaegeuk Kim75ab4cb2014-09-20 21:57:51 -0700989 if (cpc->reason == CP_UMOUNT) {
Jaegeuk Kim127e6702012-11-02 17:08:18 +0900990 write_node_summaries(sbi, start_blk);
991 start_blk += NR_CURSEG_NODE_TYPE;
992 }
993
994 /* writeout checkpoint block */
995 cp_page = grab_meta_page(sbi, start_blk);
996 kaddr = page_address(cp_page);
997 memcpy(kaddr, ckpt, (1 << sbi->log_blocksize));
998 set_page_dirty(cp_page);
999 f2fs_put_page(cp_page, 1);
1000
1001 /* wait for previous submitted node/meta pages writeback */
Changman Leefb51b5e2013-11-07 12:48:25 +09001002 wait_on_all_pages_writeback(sbi);
Jaegeuk Kim127e6702012-11-02 17:08:18 +09001003
Jaegeuk Kimcf779ca2014-08-11 18:37:46 -07001004 if (unlikely(f2fs_cp_error(sbi)))
1005 return;
1006
Jaegeuk Kim4ef51a82014-01-21 18:51:16 +09001007 filemap_fdatawait_range(NODE_MAPPING(sbi), 0, LONG_MAX);
Gu Zheng9df27d92014-01-20 18:37:04 +08001008 filemap_fdatawait_range(META_MAPPING(sbi), 0, LONG_MAX);
Jaegeuk Kim127e6702012-11-02 17:08:18 +09001009
1010 /* update user_block_counts */
1011 sbi->last_valid_block_count = sbi->total_valid_block_count;
1012 sbi->alloc_valid_block_count = 0;
1013
1014 /* Here, we only have one bio having CP pack */
Jaegeuk Kim577e3492013-01-24 19:56:11 +09001015 sync_meta_pages(sbi, META_FLUSH, LONG_MAX);
Jaegeuk Kim127e6702012-11-02 17:08:18 +09001016
Jaegeuk Kim6a8f8ca2014-10-29 14:37:22 -07001017 /* wait for previous submitted meta pages writeback */
1018 wait_on_all_pages_writeback(sbi);
1019
Jaegeuk Kimcf779ca2014-08-11 18:37:46 -07001020 release_dirty_inode(sbi);
1021
1022 if (unlikely(f2fs_cp_error(sbi)))
1023 return;
1024
1025 clear_prefree_segments(sbi);
1026 F2FS_RESET_SB_DIRT(sbi);
Jaegeuk Kim127e6702012-11-02 17:08:18 +09001027}
1028
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +09001029/*
arter97e1c42042014-08-06 23:22:50 +09001030 * We guarantee that this checkpoint procedure will not fail.
Jaegeuk Kim127e6702012-11-02 17:08:18 +09001031 */
Jaegeuk Kim75ab4cb2014-09-20 21:57:51 -07001032void write_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
Jaegeuk Kim127e6702012-11-02 17:08:18 +09001033{
1034 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1035 unsigned long long ckpt_ver;
1036
Jaegeuk Kim75ab4cb2014-09-20 21:57:51 -07001037 trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "start block_ops");
Namjae Jeon2af4bd62013-04-23 18:26:54 +09001038
Jaegeuk Kim43727522013-02-04 15:11:17 +09001039 mutex_lock(&sbi->cp_mutex);
Jaegeuk Kim85010172014-08-11 18:37:46 -07001040
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -07001041 if (!sbi->s_dirty && cpc->reason != CP_DISCARD)
Jaegeuk Kim85010172014-08-11 18:37:46 -07001042 goto out;
Jaegeuk Kimcf779ca2014-08-11 18:37:46 -07001043 if (unlikely(f2fs_cp_error(sbi)))
1044 goto out;
1045 if (block_operations(sbi))
1046 goto out;
Jaegeuk Kim127e6702012-11-02 17:08:18 +09001047
Jaegeuk Kim75ab4cb2014-09-20 21:57:51 -07001048 trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "finish block_ops");
Namjae Jeon2af4bd62013-04-23 18:26:54 +09001049
Jaegeuk Kim458e6192013-12-11 13:54:01 +09001050 f2fs_submit_merged_bio(sbi, DATA, WRITE);
1051 f2fs_submit_merged_bio(sbi, NODE, WRITE);
1052 f2fs_submit_merged_bio(sbi, META, WRITE);
Jaegeuk Kim127e6702012-11-02 17:08:18 +09001053
1054 /*
1055 * update checkpoint pack index
1056 * Increase the version number so that
1057 * SIT entries and seg summaries are written at correct place
1058 */
Jaegeuk Kimd71b5562013-08-09 15:03:21 +09001059 ckpt_ver = cur_cp_version(ckpt);
Jaegeuk Kim127e6702012-11-02 17:08:18 +09001060 ckpt->checkpoint_ver = cpu_to_le64(++ckpt_ver);
1061
1062 /* write cached NAT/SIT entries to NAT/SIT area */
1063 flush_nat_entries(sbi);
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -07001064 flush_sit_entries(sbi, cpc);
Jaegeuk Kim127e6702012-11-02 17:08:18 +09001065
Jaegeuk Kim127e6702012-11-02 17:08:18 +09001066 /* unlock all the fs_lock[] in do_checkpoint() */
Jaegeuk Kim75ab4cb2014-09-20 21:57:51 -07001067 do_checkpoint(sbi, cpc);
Jaegeuk Kim127e6702012-11-02 17:08:18 +09001068
1069 unblock_operations(sbi);
Changman Lee942e0be2014-02-13 15:12:29 +09001070 stat_inc_cp_count(sbi->stat_info);
Jaegeuk Kim85010172014-08-11 18:37:46 -07001071out:
1072 mutex_unlock(&sbi->cp_mutex);
Jaegeuk Kim75ab4cb2014-09-20 21:57:51 -07001073 trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "finish checkpoint");
Jaegeuk Kim127e6702012-11-02 17:08:18 +09001074}
1075
Jaegeuk Kim6451e042014-07-25 15:47:17 -07001076void init_ino_entry_info(struct f2fs_sb_info *sbi)
Jaegeuk Kim127e6702012-11-02 17:08:18 +09001077{
Jaegeuk Kim6451e042014-07-25 15:47:17 -07001078 int i;
1079
1080 for (i = 0; i < MAX_INO_ENTRY; i++) {
Chao Yu67298802014-11-18 11:18:36 +08001081 struct inode_management *im = &sbi->im[i];
1082
1083 INIT_RADIX_TREE(&im->ino_root, GFP_ATOMIC);
1084 spin_lock_init(&im->ino_lock);
1085 INIT_LIST_HEAD(&im->ino_list);
1086 im->ino_num = 0;
Jaegeuk Kim6451e042014-07-25 15:47:17 -07001087 }
1088
Gu Zheng0d47c1a2013-12-26 18:24:19 +08001089 /*
1090 * considering 512 blocks in a segment 8 blocks are needed for cp
1091 * and log segment summaries. Remaining blocks are used to keep
1092 * orphan entries with the limitation one reserved segment
1093 * for cp pack we can have max 1020*504 orphan entries
1094 */
Chao Yub5b82202014-08-22 16:17:38 +08001095 sbi->max_orphans = (sbi->blocks_per_seg - F2FS_CP_PACKS -
1096 NR_CURSEG_TYPE) * F2FS_ORPHANS_PER_BLOCK;
Jaegeuk Kim127e6702012-11-02 17:08:18 +09001097}
1098
Namjae Jeon6e6093a2013-01-17 00:08:30 +09001099int __init create_checkpoint_caches(void)
Jaegeuk Kim127e6702012-11-02 17:08:18 +09001100{
Jaegeuk Kim6451e042014-07-25 15:47:17 -07001101 ino_entry_slab = f2fs_kmem_cache_create("f2fs_ino_entry",
1102 sizeof(struct ino_entry));
1103 if (!ino_entry_slab)
Jaegeuk Kim127e6702012-11-02 17:08:18 +09001104 return -ENOMEM;
1105 inode_entry_slab = f2fs_kmem_cache_create("f2fs_dirty_dir_entry",
Gu Zhenge8512d22014-03-07 18:43:28 +08001106 sizeof(struct dir_inode_entry));
Jaegeuk Kim6bacf522013-12-06 15:00:58 +09001107 if (!inode_entry_slab) {
Jaegeuk Kim6451e042014-07-25 15:47:17 -07001108 kmem_cache_destroy(ino_entry_slab);
Jaegeuk Kim127e6702012-11-02 17:08:18 +09001109 return -ENOMEM;
1110 }
1111 return 0;
1112}
1113
1114void destroy_checkpoint_caches(void)
1115{
Jaegeuk Kim6451e042014-07-25 15:47:17 -07001116 kmem_cache_destroy(ino_entry_slab);
Jaegeuk Kim127e6702012-11-02 17:08:18 +09001117 kmem_cache_destroy(inode_entry_slab);
1118}