blob: 8e6455cbfc78428f612af3a816b134096c031267 [file] [log] [blame]
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +09001/*
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002 * fs/f2fs/segment.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/bio.h>
14#include <linux/blkdev.h>
Geert Uytterhoeven690e4a32012-12-19 22:19:30 +010015#include <linux/prefetch.h>
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +090016#include <linux/kthread.h>
Chao Yu74de5932013-11-22 09:09:59 +080017#include <linux/swap.h>
Jaegeuk Kim60b99b42015-10-05 14:49:57 -070018#include <linux/timer.h>
Jaegeuk Kimd430af22017-05-17 10:36:58 -070019#include <linux/freezer.h>
Jaegeuk Kimcfc72cc2017-09-09 12:03:23 -070020#include <linux/sched.h>
Jaegeuk Kim351df4b2012-11-02 17:09:16 +090021
22#include "f2fs.h"
23#include "segment.h"
24#include "node.h"
Jaegeuk Kim766330d2017-08-15 21:27:19 -070025#include "gc.h"
Jaegeuk Kim9e4ded32014-12-17 19:58:58 -080026#include "trace.h"
Namjae Jeon6ec178d2013-04-23 17:51:43 +090027#include <trace/events/f2fs.h>
Jaegeuk Kim351df4b2012-11-02 17:09:16 +090028
Changman Lee9a7f1432013-11-15 10:42:51 +090029#define __reverse_ffz(x) __reverse_ffs(~(x))
30
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +090031static struct kmem_cache *discard_entry_slab;
Jaegeuk Kime6b120d2017-07-10 12:55:09 -070032static struct kmem_cache *discard_cmd_slab;
Chao Yu184a5cd2014-09-04 18:13:01 +080033static struct kmem_cache *sit_entry_set_slab;
Jaegeuk Kim88b88a62014-10-06 17:39:50 -070034static struct kmem_cache *inmem_entry_slab;
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +090035
Jaegeuk Kimf96999c2015-10-20 15:17:19 -070036static unsigned long __reverse_ulong(unsigned char *str)
37{
38 unsigned long tmp = 0;
39 int shift = 24, idx = 0;
40
41#if BITS_PER_LONG == 64
42 shift = 56;
43#endif
44 while (shift >= 0) {
45 tmp |= (unsigned long)str[idx++] << shift;
46 shift -= BITS_PER_BYTE;
47 }
48 return tmp;
49}
50
Changman Lee9a7f1432013-11-15 10:42:51 +090051/*
52 * __reverse_ffs is copied from include/asm-generic/bitops/__ffs.h since
53 * MSB and LSB are reversed in a byte by f2fs_set_bit.
54 */
55static inline unsigned long __reverse_ffs(unsigned long word)
56{
57 int num = 0;
58
59#if BITS_PER_LONG == 64
Jaegeuk Kimf96999c2015-10-20 15:17:19 -070060 if ((word & 0xffffffff00000000UL) == 0)
Changman Lee9a7f1432013-11-15 10:42:51 +090061 num += 32;
Jaegeuk Kimf96999c2015-10-20 15:17:19 -070062 else
Changman Lee9a7f1432013-11-15 10:42:51 +090063 word >>= 32;
Changman Lee9a7f1432013-11-15 10:42:51 +090064#endif
Jaegeuk Kimf96999c2015-10-20 15:17:19 -070065 if ((word & 0xffff0000) == 0)
Changman Lee9a7f1432013-11-15 10:42:51 +090066 num += 16;
Jaegeuk Kimf96999c2015-10-20 15:17:19 -070067 else
Changman Lee9a7f1432013-11-15 10:42:51 +090068 word >>= 16;
Jaegeuk Kimf96999c2015-10-20 15:17:19 -070069
70 if ((word & 0xff00) == 0)
Changman Lee9a7f1432013-11-15 10:42:51 +090071 num += 8;
Jaegeuk Kimf96999c2015-10-20 15:17:19 -070072 else
Changman Lee9a7f1432013-11-15 10:42:51 +090073 word >>= 8;
Jaegeuk Kimf96999c2015-10-20 15:17:19 -070074
Changman Lee9a7f1432013-11-15 10:42:51 +090075 if ((word & 0xf0) == 0)
76 num += 4;
77 else
78 word >>= 4;
Jaegeuk Kimf96999c2015-10-20 15:17:19 -070079
Changman Lee9a7f1432013-11-15 10:42:51 +090080 if ((word & 0xc) == 0)
81 num += 2;
82 else
83 word >>= 2;
Jaegeuk Kimf96999c2015-10-20 15:17:19 -070084
Changman Lee9a7f1432013-11-15 10:42:51 +090085 if ((word & 0x2) == 0)
86 num += 1;
87 return num;
88}
89
90/*
arter97e1c42042014-08-06 23:22:50 +090091 * __find_rev_next(_zero)_bit is copied from lib/find_next_bit.c because
Changman Lee9a7f1432013-11-15 10:42:51 +090092 * f2fs_set_bit makes MSB and LSB reversed in a byte.
Fan Li692223d2015-11-12 08:43:04 +080093 * @size must be integral times of unsigned long.
Changman Lee9a7f1432013-11-15 10:42:51 +090094 * Example:
Jaegeuk Kimf96999c2015-10-20 15:17:19 -070095 * MSB <--> LSB
96 * f2fs_set_bit(0, bitmap) => 1000 0000
97 * f2fs_set_bit(7, bitmap) => 0000 0001
Changman Lee9a7f1432013-11-15 10:42:51 +090098 */
99static unsigned long __find_rev_next_bit(const unsigned long *addr,
100 unsigned long size, unsigned long offset)
101{
102 const unsigned long *p = addr + BIT_WORD(offset);
Fan Li692223d2015-11-12 08:43:04 +0800103 unsigned long result = size;
Changman Lee9a7f1432013-11-15 10:42:51 +0900104 unsigned long tmp;
Changman Lee9a7f1432013-11-15 10:42:51 +0900105
106 if (offset >= size)
107 return size;
108
Fan Li692223d2015-11-12 08:43:04 +0800109 size -= (offset & ~(BITS_PER_LONG - 1));
Changman Lee9a7f1432013-11-15 10:42:51 +0900110 offset %= BITS_PER_LONG;
Changman Lee9a7f1432013-11-15 10:42:51 +0900111
Fan Li692223d2015-11-12 08:43:04 +0800112 while (1) {
113 if (*p == 0)
114 goto pass;
Jaegeuk Kimf96999c2015-10-20 15:17:19 -0700115
Jaegeuk Kimf96999c2015-10-20 15:17:19 -0700116 tmp = __reverse_ulong((unsigned char *)p);
Fan Li692223d2015-11-12 08:43:04 +0800117
118 tmp &= ~0UL >> offset;
119 if (size < BITS_PER_LONG)
120 tmp &= (~0UL << (BITS_PER_LONG - size));
Changman Lee9a7f1432013-11-15 10:42:51 +0900121 if (tmp)
Fan Li692223d2015-11-12 08:43:04 +0800122 goto found;
123pass:
124 if (size <= BITS_PER_LONG)
125 break;
Changman Lee9a7f1432013-11-15 10:42:51 +0900126 size -= BITS_PER_LONG;
Fan Li692223d2015-11-12 08:43:04 +0800127 offset = 0;
Jaegeuk Kimf96999c2015-10-20 15:17:19 -0700128 p++;
Changman Lee9a7f1432013-11-15 10:42:51 +0900129 }
Fan Li692223d2015-11-12 08:43:04 +0800130 return result;
131found:
132 return result - size + __reverse_ffs(tmp);
Changman Lee9a7f1432013-11-15 10:42:51 +0900133}
134
135static unsigned long __find_rev_next_zero_bit(const unsigned long *addr,
136 unsigned long size, unsigned long offset)
137{
138 const unsigned long *p = addr + BIT_WORD(offset);
Jaegeuk Kim80609442015-12-04 16:51:13 -0800139 unsigned long result = size;
Changman Lee9a7f1432013-11-15 10:42:51 +0900140 unsigned long tmp;
Changman Lee9a7f1432013-11-15 10:42:51 +0900141
142 if (offset >= size)
143 return size;
144
Jaegeuk Kim80609442015-12-04 16:51:13 -0800145 size -= (offset & ~(BITS_PER_LONG - 1));
Changman Lee9a7f1432013-11-15 10:42:51 +0900146 offset %= BITS_PER_LONG;
Changman Lee9a7f1432013-11-15 10:42:51 +0900147
Jaegeuk Kim80609442015-12-04 16:51:13 -0800148 while (1) {
149 if (*p == ~0UL)
150 goto pass;
Jaegeuk Kimf96999c2015-10-20 15:17:19 -0700151
Jaegeuk Kimf96999c2015-10-20 15:17:19 -0700152 tmp = __reverse_ulong((unsigned char *)p);
Jaegeuk Kim80609442015-12-04 16:51:13 -0800153
154 if (offset)
155 tmp |= ~0UL << (BITS_PER_LONG - offset);
156 if (size < BITS_PER_LONG)
157 tmp |= ~0UL >> size;
Jaegeuk Kimf96999c2015-10-20 15:17:19 -0700158 if (tmp != ~0UL)
Jaegeuk Kim80609442015-12-04 16:51:13 -0800159 goto found;
160pass:
161 if (size <= BITS_PER_LONG)
162 break;
Changman Lee9a7f1432013-11-15 10:42:51 +0900163 size -= BITS_PER_LONG;
Jaegeuk Kim80609442015-12-04 16:51:13 -0800164 offset = 0;
Jaegeuk Kimf96999c2015-10-20 15:17:19 -0700165 p++;
Changman Lee9a7f1432013-11-15 10:42:51 +0900166 }
Jaegeuk Kim80609442015-12-04 16:51:13 -0800167 return result;
168found:
169 return result - size + __reverse_ffz(tmp);
Changman Lee9a7f1432013-11-15 10:42:51 +0900170}
171
Chao Yu6b4d6a82018-05-30 00:20:41 +0800172bool f2fs_need_SSR(struct f2fs_sb_info *sbi)
Jaegeuk Kim2b170fc2017-09-09 11:11:04 -0700173{
174 int node_secs = get_blocktype_secs(sbi, F2FS_DIRTY_NODES);
175 int dent_secs = get_blocktype_secs(sbi, F2FS_DIRTY_DENTS);
176 int imeta_secs = get_blocktype_secs(sbi, F2FS_DIRTY_IMETA);
177
178 if (test_opt(sbi, LFS))
179 return false;
Jaegeuk Kim0390d832018-05-07 14:22:40 -0700180 if (sbi->gc_mode == GC_URGENT)
Jaegeuk Kim2b170fc2017-09-09 11:11:04 -0700181 return true;
182
183 return free_sections(sbi) <= (node_secs + 2 * dent_secs + imeta_secs +
Chao Yub9f73872017-10-28 16:52:33 +0800184 SM_I(sbi)->min_ssr_sections + reserved_sections(sbi));
Jaegeuk Kim2b170fc2017-09-09 11:11:04 -0700185}
186
Chao Yu6b4d6a82018-05-30 00:20:41 +0800187void f2fs_register_inmem_page(struct inode *inode, struct page *page)
Jaegeuk Kim88b88a62014-10-06 17:39:50 -0700188{
Jaegeuk Kim35e13ca2017-10-18 19:05:57 -0700189 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
Jaegeuk Kim88b88a62014-10-06 17:39:50 -0700190 struct f2fs_inode_info *fi = F2FS_I(inode);
191 struct inmem_pages *new;
Jaegeuk Kim9be32d72014-12-05 10:39:49 -0800192
Jaegeuk Kim9e4ded32014-12-17 19:58:58 -0800193 f2fs_trace_pid(page);
Jaegeuk Kim0722b102014-12-05 11:58:02 -0800194
Chao Yudecd36b2015-08-07 18:42:09 +0800195 set_page_private(page, (unsigned long)ATOMIC_WRITTEN_PAGE);
196 SetPagePrivate(page);
197
Jaegeuk Kim88b88a62014-10-06 17:39:50 -0700198 new = f2fs_kmem_cache_alloc(inmem_entry_slab, GFP_NOFS);
199
200 /* add atomic page indices to the list */
201 new->page = page;
202 INIT_LIST_HEAD(&new->list);
Chao Yudecd36b2015-08-07 18:42:09 +0800203
Jaegeuk Kim88b88a62014-10-06 17:39:50 -0700204 /* increase reference count with clean state */
205 mutex_lock(&fi->inmem_lock);
206 get_page(page);
207 list_add_tail(&new->list, &fi->inmem_pages);
Jaegeuk Kim35e13ca2017-10-18 19:05:57 -0700208 spin_lock(&sbi->inode_lock[ATOMIC_FILE]);
209 if (list_empty(&fi->inmem_ilist))
210 list_add_tail(&fi->inmem_ilist, &sbi->inode_list[ATOMIC_FILE]);
211 spin_unlock(&sbi->inode_lock[ATOMIC_FILE]);
Jaegeuk Kim8dcf2ff72014-12-05 17:18:15 -0800212 inc_page_count(F2FS_I_SB(inode), F2FS_INMEM_PAGES);
Jaegeuk Kim88b88a62014-10-06 17:39:50 -0700213 mutex_unlock(&fi->inmem_lock);
Jaegeuk Kim8ce67cb2015-03-17 17:58:08 -0700214
215 trace_f2fs_register_inmem_page(page, INMEM);
Jaegeuk Kim88b88a62014-10-06 17:39:50 -0700216}
217
Chao Yu28bc1062016-02-06 14:40:34 +0800218static int __revoke_inmem_pages(struct inode *inode,
219 struct list_head *head, bool drop, bool recover)
Jaegeuk Kim88b88a62014-10-06 17:39:50 -0700220{
Chao Yu28bc1062016-02-06 14:40:34 +0800221 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
Jaegeuk Kim88b88a62014-10-06 17:39:50 -0700222 struct inmem_pages *cur, *tmp;
Chao Yu28bc1062016-02-06 14:40:34 +0800223 int err = 0;
Jaegeuk Kim88b88a62014-10-06 17:39:50 -0700224
Chao Yu29b96b52016-02-06 14:38:29 +0800225 list_for_each_entry_safe(cur, tmp, head, list) {
Chao Yu28bc1062016-02-06 14:40:34 +0800226 struct page *page = cur->page;
Jaegeuk Kim88b88a62014-10-06 17:39:50 -0700227
Chao Yu28bc1062016-02-06 14:40:34 +0800228 if (drop)
229 trace_f2fs_commit_inmem_page(page, INMEM_DROP);
230
231 lock_page(page);
232
Chao Yu2f7e4882018-04-23 10:36:13 +0800233 f2fs_wait_on_page_writeback(page, DATA, true);
234
Chao Yu28bc1062016-02-06 14:40:34 +0800235 if (recover) {
236 struct dnode_of_data dn;
237 struct node_info ni;
238
239 trace_f2fs_commit_inmem_page(page, INMEM_REVOKE);
Chao Yu4b634f362017-08-08 19:09:08 +0800240retry:
Chao Yu28bc1062016-02-06 14:40:34 +0800241 set_new_dnode(&dn, inode, NULL, NULL, 0);
Chao Yu6b4d6a82018-05-30 00:20:41 +0800242 err = f2fs_get_dnode_of_data(&dn, page->index,
243 LOOKUP_NODE);
Chao Yu4b634f362017-08-08 19:09:08 +0800244 if (err) {
245 if (err == -ENOMEM) {
246 congestion_wait(BLK_RW_ASYNC, HZ/50);
247 cond_resched();
248 goto retry;
249 }
Chao Yu28bc1062016-02-06 14:40:34 +0800250 err = -EAGAIN;
251 goto next;
252 }
Chao Yu6b4d6a82018-05-30 00:20:41 +0800253 f2fs_get_node_info(sbi, dn.nid, &ni);
Daeho Jeongd1a6b4f2018-01-10 16:49:10 +0900254 if (cur->old_addr == NEW_ADDR) {
Chao Yu6b4d6a82018-05-30 00:20:41 +0800255 f2fs_invalidate_blocks(sbi, dn.data_blkaddr);
Daeho Jeongd1a6b4f2018-01-10 16:49:10 +0900256 f2fs_update_data_blkaddr(&dn, NEW_ADDR);
257 } else
258 f2fs_replace_block(sbi, &dn, dn.data_blkaddr,
Chao Yu28bc1062016-02-06 14:40:34 +0800259 cur->old_addr, ni.version, true, true);
260 f2fs_put_dnode(&dn);
261 }
262next:
Jaegeuk Kim63c52d72016-04-12 14:11:03 -0700263 /* we don't need to invalidate this in the sccessful status */
264 if (drop || recover)
265 ClearPageUptodate(page);
Chao Yu28bc1062016-02-06 14:40:34 +0800266 set_page_private(page, 0);
Chao Yuc81ced02016-04-29 20:13:36 +0800267 ClearPagePrivate(page);
Chao Yu28bc1062016-02-06 14:40:34 +0800268 f2fs_put_page(page, 1);
Chao Yudecd36b2015-08-07 18:42:09 +0800269
Jaegeuk Kim88b88a62014-10-06 17:39:50 -0700270 list_del(&cur->list);
271 kmem_cache_free(inmem_entry_slab, cur);
Jaegeuk Kim8dcf2ff72014-12-05 17:18:15 -0800272 dec_page_count(F2FS_I_SB(inode), F2FS_INMEM_PAGES);
Jaegeuk Kim88b88a62014-10-06 17:39:50 -0700273 }
Chao Yu28bc1062016-02-06 14:40:34 +0800274 return err;
Chao Yu29b96b52016-02-06 14:38:29 +0800275}
276
Chao Yu6b4d6a82018-05-30 00:20:41 +0800277void f2fs_drop_inmem_pages_all(struct f2fs_sb_info *sbi, bool gc_failure)
Jaegeuk Kim35e13ca2017-10-18 19:05:57 -0700278{
279 struct list_head *head = &sbi->inode_list[ATOMIC_FILE];
280 struct inode *inode;
281 struct f2fs_inode_info *fi;
282next:
283 spin_lock(&sbi->inode_lock[ATOMIC_FILE]);
284 if (list_empty(head)) {
285 spin_unlock(&sbi->inode_lock[ATOMIC_FILE]);
286 return;
287 }
288 fi = list_first_entry(head, struct f2fs_inode_info, inmem_ilist);
289 inode = igrab(&fi->vfs_inode);
290 spin_unlock(&sbi->inode_lock[ATOMIC_FILE]);
291
292 if (inode) {
Chao Yucaf10c62018-05-07 20:28:54 +0800293 if (gc_failure) {
294 if (fi->i_gc_failures[GC_FAILURE_ATOMIC])
295 goto drop;
296 goto skip;
297 }
298drop:
299 set_inode_flag(inode, FI_ATOMIC_REVOKE_REQUEST);
Chao Yu6b4d6a82018-05-30 00:20:41 +0800300 f2fs_drop_inmem_pages(inode);
Jaegeuk Kim35e13ca2017-10-18 19:05:57 -0700301 iput(inode);
302 }
Chao Yucaf10c62018-05-07 20:28:54 +0800303skip:
Jaegeuk Kim35e13ca2017-10-18 19:05:57 -0700304 congestion_wait(BLK_RW_ASYNC, HZ/50);
305 cond_resched();
306 goto next;
307}
308
Chao Yu6b4d6a82018-05-30 00:20:41 +0800309void f2fs_drop_inmem_pages(struct inode *inode)
Chao Yu29b96b52016-02-06 14:38:29 +0800310{
Jaegeuk Kim35e13ca2017-10-18 19:05:57 -0700311 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
Chao Yu29b96b52016-02-06 14:38:29 +0800312 struct f2fs_inode_info *fi = F2FS_I(inode);
313
314 mutex_lock(&fi->inmem_lock);
Chao Yu28bc1062016-02-06 14:40:34 +0800315 __revoke_inmem_pages(inode, &fi->inmem_pages, true, false);
Jaegeuk Kim35e13ca2017-10-18 19:05:57 -0700316 spin_lock(&sbi->inode_lock[ATOMIC_FILE]);
317 if (!list_empty(&fi->inmem_ilist))
318 list_del_init(&fi->inmem_ilist);
319 spin_unlock(&sbi->inode_lock[ATOMIC_FILE]);
Chao Yu29b96b52016-02-06 14:38:29 +0800320 mutex_unlock(&fi->inmem_lock);
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700321
322 clear_inode_flag(inode, FI_ATOMIC_FILE);
Chao Yucaf10c62018-05-07 20:28:54 +0800323 fi->i_gc_failures[GC_FAILURE_ATOMIC] = 0;
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700324 stat_dec_atomic_write(inode);
325}
326
Chao Yu6b4d6a82018-05-30 00:20:41 +0800327void f2fs_drop_inmem_page(struct inode *inode, struct page *page)
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700328{
329 struct f2fs_inode_info *fi = F2FS_I(inode);
330 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
331 struct list_head *head = &fi->inmem_pages;
332 struct inmem_pages *cur = NULL;
333
334 f2fs_bug_on(sbi, !IS_ATOMIC_WRITTEN_PAGE(page));
335
336 mutex_lock(&fi->inmem_lock);
337 list_for_each_entry(cur, head, list) {
338 if (cur->page == page)
339 break;
340 }
341
Sheng Yong51ad1792018-04-17 17:12:27 +0800342 f2fs_bug_on(sbi, list_empty(head) || cur->page != page);
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700343 list_del(&cur->list);
344 mutex_unlock(&fi->inmem_lock);
345
346 dec_page_count(sbi, F2FS_INMEM_PAGES);
347 kmem_cache_free(inmem_entry_slab, cur);
348
349 ClearPageUptodate(page);
350 set_page_private(page, 0);
351 ClearPagePrivate(page);
352 f2fs_put_page(page, 0);
353
354 trace_f2fs_commit_inmem_page(page, INMEM_INVALIDATE);
Chao Yu29b96b52016-02-06 14:38:29 +0800355}
356
Chao Yu6b4d6a82018-05-30 00:20:41 +0800357static int __f2fs_commit_inmem_pages(struct inode *inode)
Chao Yu29b96b52016-02-06 14:38:29 +0800358{
359 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
360 struct f2fs_inode_info *fi = F2FS_I(inode);
361 struct inmem_pages *cur, *tmp;
362 struct f2fs_io_info fio = {
363 .sbi = sbi,
Chao Yuf014be82017-09-29 13:59:38 +0800364 .ino = inode->i_ino,
Chao Yu29b96b52016-02-06 14:38:29 +0800365 .type = DATA,
Mike Christie04d328d2016-06-05 14:31:55 -0500366 .op = REQ_OP_WRITE,
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700367 .op_flags = REQ_SYNC | REQ_PRIO,
Chao Yuc0fe4882017-08-02 23:21:48 +0800368 .io_type = FS_DATA_IO,
Chao Yu29b96b52016-02-06 14:38:29 +0800369 };
Chao Yu0b4d0d02018-04-23 10:36:14 +0800370 struct list_head revoke_list;
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700371 pgoff_t last_idx = ULONG_MAX;
Chao Yu29b96b52016-02-06 14:38:29 +0800372 int err = 0;
373
Chao Yu0b4d0d02018-04-23 10:36:14 +0800374 INIT_LIST_HEAD(&revoke_list);
375
Chao Yu29b96b52016-02-06 14:38:29 +0800376 list_for_each_entry_safe(cur, tmp, &fi->inmem_pages, list) {
Chao Yu28bc1062016-02-06 14:40:34 +0800377 struct page *page = cur->page;
378
379 lock_page(page);
380 if (page->mapping == inode->i_mapping) {
381 trace_f2fs_commit_inmem_page(page, INMEM);
382
383 set_page_dirty(page);
384 f2fs_wait_on_page_writeback(page, DATA, true);
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700385 if (clear_page_dirty_for_io(page)) {
Chao Yu29b96b52016-02-06 14:38:29 +0800386 inode_dec_dirty_pages(inode);
Chao Yu6b4d6a82018-05-30 00:20:41 +0800387 f2fs_remove_dirty_inode(inode);
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700388 }
Jaegeuk Kim847413f2017-07-19 10:59:55 -0700389retry:
Chao Yu28bc1062016-02-06 14:40:34 +0800390 fio.page = page;
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700391 fio.old_blkaddr = NULL_ADDR;
392 fio.encrypted_page = NULL;
Jaegeuk Kim1b48ed62017-05-12 13:51:34 -0700393 fio.need_lock = LOCK_DONE;
Chao Yu6b4d6a82018-05-30 00:20:41 +0800394 err = f2fs_do_write_data_page(&fio);
Chao Yu29b96b52016-02-06 14:38:29 +0800395 if (err) {
Jaegeuk Kim847413f2017-07-19 10:59:55 -0700396 if (err == -ENOMEM) {
397 congestion_wait(BLK_RW_ASYNC, HZ/50);
398 cond_resched();
399 goto retry;
400 }
Chao Yu28bc1062016-02-06 14:40:34 +0800401 unlock_page(page);
Chao Yu29b96b52016-02-06 14:38:29 +0800402 break;
403 }
Chao Yu28bc1062016-02-06 14:40:34 +0800404 /* record old blkaddr for revoking */
405 cur->old_addr = fio.old_blkaddr;
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700406 last_idx = page->index;
Chao Yu29b96b52016-02-06 14:38:29 +0800407 }
Chao Yu28bc1062016-02-06 14:40:34 +0800408 unlock_page(page);
Chao Yu0b4d0d02018-04-23 10:36:14 +0800409 list_move_tail(&cur->list, &revoke_list);
Chao Yu29b96b52016-02-06 14:38:29 +0800410 }
411
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700412 if (last_idx != ULONG_MAX)
Jaegeuk Kim9bc576a2017-05-10 11:28:38 -0700413 f2fs_submit_merged_write_cond(sbi, inode, 0, last_idx, DATA);
Chao Yu28bc1062016-02-06 14:40:34 +0800414
Chao Yu28bc1062016-02-06 14:40:34 +0800415 if (err) {
Chao Yu28bc1062016-02-06 14:40:34 +0800416 /*
417 * try to revoke all committed pages, but still we could fail
418 * due to no memory or other reason, if that happened, EAGAIN
419 * will be returned, which means in such case, transaction is
420 * already not integrity, caller should use journal to do the
421 * recovery or rewrite & commit last transaction. For other
422 * error number, revoking was done by filesystem itself.
423 */
Chao Yu0b4d0d02018-04-23 10:36:14 +0800424 err = __revoke_inmem_pages(inode, &revoke_list, false, true);
Chao Yu28bc1062016-02-06 14:40:34 +0800425
426 /* drop all uncommitted pages */
427 __revoke_inmem_pages(inode, &fi->inmem_pages, true, false);
Chao Yu0b4d0d02018-04-23 10:36:14 +0800428 } else {
429 __revoke_inmem_pages(inode, &revoke_list, false, false);
Chao Yu28bc1062016-02-06 14:40:34 +0800430 }
Chao Yu0b4d0d02018-04-23 10:36:14 +0800431
432 return err;
433}
434
Chao Yu6b4d6a82018-05-30 00:20:41 +0800435int f2fs_commit_inmem_pages(struct inode *inode)
Chao Yu0b4d0d02018-04-23 10:36:14 +0800436{
437 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
438 struct f2fs_inode_info *fi = F2FS_I(inode);
439 int err;
440
441 f2fs_balance_fs(sbi, true);
442 f2fs_lock_op(sbi);
443
444 set_inode_flag(inode, FI_ATOMIC_COMMIT);
445
446 mutex_lock(&fi->inmem_lock);
Chao Yu6b4d6a82018-05-30 00:20:41 +0800447 err = __f2fs_commit_inmem_pages(inode);
Chao Yu0b4d0d02018-04-23 10:36:14 +0800448
Jaegeuk Kim35e13ca2017-10-18 19:05:57 -0700449 spin_lock(&sbi->inode_lock[ATOMIC_FILE]);
450 if (!list_empty(&fi->inmem_ilist))
451 list_del_init(&fi->inmem_ilist);
452 spin_unlock(&sbi->inode_lock[ATOMIC_FILE]);
Jaegeuk Kim88b88a62014-10-06 17:39:50 -0700453 mutex_unlock(&fi->inmem_lock);
454
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700455 clear_inode_flag(inode, FI_ATOMIC_COMMIT);
456
Chao Yu29b96b52016-02-06 14:38:29 +0800457 f2fs_unlock_op(sbi);
Jaegeuk Kimedb27de2015-07-25 00:52:52 -0700458 return err;
Jaegeuk Kim88b88a62014-10-06 17:39:50 -0700459}
460
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +0900461/*
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900462 * This function balances dirty node and dentry pages.
463 * In addition, it controls garbage collection.
464 */
Jaegeuk Kim2c4db1a2016-01-07 14:15:04 -0800465void f2fs_balance_fs(struct f2fs_sb_info *sbi, bool need)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900466{
Chao Yu0f348022016-09-26 19:45:55 +0800467#ifdef CONFIG_F2FS_FAULT_INJECTION
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700468 if (time_to_inject(sbi, FAULT_CHECKPOINT)) {
469 f2fs_show_injection_info(FAULT_CHECKPOINT);
Chao Yu0f348022016-09-26 19:45:55 +0800470 f2fs_stop_checkpoint(sbi, false);
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700471 }
Chao Yu0f348022016-09-26 19:45:55 +0800472#endif
473
Jaegeuk Kime589c2c2016-06-02 15:24:24 -0700474 /* balance_fs_bg is able to be pending */
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700475 if (need && excess_cached_nats(sbi))
Jaegeuk Kime589c2c2016-06-02 15:24:24 -0700476 f2fs_balance_fs_bg(sbi);
477
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900478 /*
Jaegeuk Kim029cd282012-12-21 17:20:21 +0900479 * We should do GC or end up with checkpoint, if there are so many dirty
480 * dir/node pages without enough free segments.
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900481 */
Jaegeuk Kim7f3037a2016-09-01 12:02:51 -0700482 if (has_not_enough_free_secs(sbi, 0, 0)) {
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900483 mutex_lock(&sbi->gc_mutex);
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700484 f2fs_gc(sbi, false, false, NULL_SEGNO);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900485 }
486}
487
Jaegeuk Kim4660f9c2013-10-24 14:19:18 +0900488void f2fs_balance_fs_bg(struct f2fs_sb_info *sbi)
489{
Chao Yu4636af92018-05-26 18:03:34 +0800490 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
491 return;
492
Chao Yu1dcc3362015-02-05 17:57:31 +0800493 /* try to shrink extent cache when there is no enough memory */
Chao Yu6b4d6a82018-05-30 00:20:41 +0800494 if (!f2fs_available_free_memory(sbi, EXTENT_CACHE))
Jaegeuk Kim554df792015-06-19 13:41:23 -0700495 f2fs_shrink_extent_tree(sbi, EXTENT_CACHE_SHRINK_NUMBER);
Chao Yu1dcc3362015-02-05 17:57:31 +0800496
Jaegeuk Kim1b38dc82015-06-19 15:36:07 -0700497 /* check the # of cached NAT entries */
Chao Yu6b4d6a82018-05-30 00:20:41 +0800498 if (!f2fs_available_free_memory(sbi, NAT_ENTRIES))
499 f2fs_try_to_free_nats(sbi, NAT_ENTRY_PER_BLOCK);
Jaegeuk Kim1b38dc82015-06-19 15:36:07 -0700500
Chao Yu6b4d6a82018-05-30 00:20:41 +0800501 if (!f2fs_available_free_memory(sbi, FREE_NIDS))
502 f2fs_try_to_free_nids(sbi, MAX_FREE_NIDS);
Jaegeuk Kimad4edb82016-06-16 16:41:49 -0700503 else
Chao Yu6b4d6a82018-05-30 00:20:41 +0800504 f2fs_build_free_nids(sbi, false, false);
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700505
506 if (!is_idle(sbi) && !excess_dirty_nats(sbi))
507 return;
Chao Yu31696582015-07-28 18:33:46 +0800508
Jaegeuk Kim1b38dc82015-06-19 15:36:07 -0700509 /* checkpoint is the only way to shrink partial cached entries */
Chao Yu6b4d6a82018-05-30 00:20:41 +0800510 if (!f2fs_available_free_memory(sbi, NAT_ENTRIES) ||
511 !f2fs_available_free_memory(sbi, INO_ENTRIES) ||
Chao Yu7d768d22016-01-18 18:31:18 +0800512 excess_prefree_segs(sbi) ||
513 excess_dirty_nats(sbi) ||
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700514 f2fs_time_over(sbi, CP_TIME)) {
Chao Yue9f5b8b2016-02-14 18:54:33 +0800515 if (test_opt(sbi, DATA_FLUSH)) {
516 struct blk_plug plug;
517
518 blk_start_plug(&plug);
Chao Yu6b4d6a82018-05-30 00:20:41 +0800519 f2fs_sync_dirty_inodes(sbi, FILE_INODE);
Chao Yue9f5b8b2016-02-14 18:54:33 +0800520 blk_finish_plug(&plug);
521 }
Jaegeuk Kim4660f9c2013-10-24 14:19:18 +0900522 f2fs_sync_fs(sbi->sb, true);
Jaegeuk Kim42190d22016-01-09 13:45:17 -0800523 stat_inc_bg_cp_count(sbi->stat_info);
Chao Yu36b35a02015-12-17 17:13:28 +0800524 }
Jaegeuk Kim4660f9c2013-10-24 14:19:18 +0900525}
526
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700527static int __submit_flush_wait(struct f2fs_sb_info *sbi,
528 struct block_device *bdev)
529{
Chao Yub5db2de2017-10-28 16:52:31 +0800530 struct bio *bio = f2fs_bio_alloc(sbi, 0, true);
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700531 int ret;
532
533 bio->bi_opf = REQ_OP_WRITE | REQ_SYNC | REQ_PREFLUSH;
534 bio->bi_bdev = bdev;
535 ret = submit_bio_wait(bio);
536 bio_put(bio);
537
538 trace_f2fs_issue_flush(bdev, test_opt(sbi, NOBARRIER),
539 test_opt(sbi, FLUSH_MERGE), ret);
540 return ret;
541}
542
Chao Yuf014be82017-09-29 13:59:38 +0800543static int submit_flush_wait(struct f2fs_sb_info *sbi, nid_t ino)
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700544{
Chao Yuf014be82017-09-29 13:59:38 +0800545 int ret = 0;
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700546 int i;
547
Chao Yuf014be82017-09-29 13:59:38 +0800548 if (!sbi->s_ndevs)
549 return __submit_flush_wait(sbi, sbi->sb->s_bdev);
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700550
Chao Yuf014be82017-09-29 13:59:38 +0800551 for (i = 0; i < sbi->s_ndevs; i++) {
Chao Yu6b4d6a82018-05-30 00:20:41 +0800552 if (!f2fs_is_dirty_device(sbi, ino, i, FLUSH_INO))
Chao Yuf014be82017-09-29 13:59:38 +0800553 continue;
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700554 ret = __submit_flush_wait(sbi, FDEV(i).bdev);
555 if (ret)
556 break;
557 }
558 return ret;
559}
560
Gu Zheng2163d192014-04-27 14:21:33 +0800561static int issue_flush_thread(void *data)
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900562{
563 struct f2fs_sb_info *sbi = data;
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700564 struct flush_cmd_control *fcc = SM_I(sbi)->fcc_info;
Gu Zhenga688b9d9e2014-04-27 14:21:21 +0800565 wait_queue_head_t *q = &fcc->flush_wait_queue;
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900566repeat:
567 if (kthread_should_stop())
568 return 0;
569
Chao Yuce8bd4b2017-07-22 08:52:23 +0800570 sb_start_intwrite(sbi->sb);
571
Gu Zheng721bd4d2014-09-05 18:31:00 +0800572 if (!llist_empty(&fcc->issue_list)) {
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900573 struct flush_cmd *cmd, *next;
574 int ret;
575
Gu Zheng721bd4d2014-09-05 18:31:00 +0800576 fcc->dispatch_list = llist_del_all(&fcc->issue_list);
577 fcc->dispatch_list = llist_reverse_order(fcc->dispatch_list);
578
Chao Yuf014be82017-09-29 13:59:38 +0800579 cmd = llist_entry(fcc->dispatch_list, struct flush_cmd, llnode);
580
581 ret = submit_flush_wait(sbi, cmd->ino);
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700582 atomic_inc(&fcc->issued_flush);
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900583
Gu Zheng721bd4d2014-09-05 18:31:00 +0800584 llist_for_each_entry_safe(cmd, next,
585 fcc->dispatch_list, llnode) {
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900586 cmd->ret = ret;
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900587 complete(&cmd->wait);
588 }
Gu Zhenga688b9d9e2014-04-27 14:21:21 +0800589 fcc->dispatch_list = NULL;
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900590 }
591
Chao Yuce8bd4b2017-07-22 08:52:23 +0800592 sb_end_intwrite(sbi->sb);
593
Gu Zhenga688b9d9e2014-04-27 14:21:21 +0800594 wait_event_interruptible(*q,
Gu Zheng721bd4d2014-09-05 18:31:00 +0800595 kthread_should_stop() || !llist_empty(&fcc->issue_list));
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900596 goto repeat;
597}
598
Chao Yuf014be82017-09-29 13:59:38 +0800599int f2fs_issue_flush(struct f2fs_sb_info *sbi, nid_t ino)
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900600{
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700601 struct flush_cmd_control *fcc = SM_I(sbi)->fcc_info;
Chao Yuadf8d902014-05-08 17:00:35 +0800602 struct flush_cmd cmd;
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700603 int ret;
Jaegeuk Kim24a9ee02014-07-25 17:46:10 -0700604
Jaegeuk Kim0f7b2ab2014-07-23 09:57:31 -0700605 if (test_opt(sbi, NOBARRIER))
606 return 0;
607
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700608 if (!test_opt(sbi, FLUSH_MERGE)) {
Chao Yuf014be82017-09-29 13:59:38 +0800609 ret = submit_flush_wait(sbi, ino);
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700610 atomic_inc(&fcc->issued_flush);
611 return ret;
612 }
Jaegeuk Kim740432f2015-08-14 11:43:56 -0700613
Chao Yuf014be82017-09-29 13:59:38 +0800614 if (atomic_inc_return(&fcc->issing_flush) == 1 || sbi->s_ndevs > 1) {
615 ret = submit_flush_wait(sbi, ino);
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700616 atomic_dec(&fcc->issing_flush);
617
618 atomic_inc(&fcc->issued_flush);
Jaegeuk Kim740432f2015-08-14 11:43:56 -0700619 return ret;
620 }
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900621
Chao Yuf014be82017-09-29 13:59:38 +0800622 cmd.ino = ino;
Chao Yuadf8d902014-05-08 17:00:35 +0800623 init_completion(&cmd.wait);
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900624
Gu Zheng721bd4d2014-09-05 18:31:00 +0800625 llist_add(&cmd.llnode, &fcc->issue_list);
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900626
Chao Yu4aab88e2017-08-21 22:53:45 +0800627 /* update issue_list before we wake up issue_flush thread */
628 smp_mb();
629
630 if (waitqueue_active(&fcc->flush_wait_queue))
Gu Zhenga688b9d9e2014-04-27 14:21:21 +0800631 wake_up(&fcc->flush_wait_queue);
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900632
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700633 if (fcc->f2fs_issue_flush) {
634 wait_for_completion(&cmd.wait);
635 atomic_dec(&fcc->issing_flush);
636 } else {
Chao Yub0171d92017-08-31 18:56:06 +0800637 struct llist_node *list;
638
639 list = llist_del_all(&fcc->issue_list);
640 if (!list) {
641 wait_for_completion(&cmd.wait);
642 atomic_dec(&fcc->issing_flush);
643 } else {
644 struct flush_cmd *tmp, *next;
645
Chao Yuf014be82017-09-29 13:59:38 +0800646 ret = submit_flush_wait(sbi, ino);
Chao Yub0171d92017-08-31 18:56:06 +0800647
648 llist_for_each_entry_safe(tmp, next, list, llnode) {
649 if (tmp == &cmd) {
650 cmd.ret = ret;
651 atomic_dec(&fcc->issing_flush);
652 continue;
653 }
654 tmp->ret = ret;
655 complete(&tmp->wait);
656 }
657 }
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700658 }
Chao Yuadf8d902014-05-08 17:00:35 +0800659
660 return cmd.ret;
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900661}
662
Chao Yu6b4d6a82018-05-30 00:20:41 +0800663int f2fs_create_flush_cmd_control(struct f2fs_sb_info *sbi)
Gu Zheng2163d192014-04-27 14:21:33 +0800664{
665 dev_t dev = sbi->sb->s_bdev->bd_dev;
666 struct flush_cmd_control *fcc;
667 int err = 0;
668
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700669 if (SM_I(sbi)->fcc_info) {
670 fcc = SM_I(sbi)->fcc_info;
Yunlong Song471cd232017-06-24 15:57:19 +0800671 if (fcc->f2fs_issue_flush)
672 return err;
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700673 goto init_thread;
674 }
675
Chao Yue585ca22017-11-30 19:28:17 +0800676 fcc = f2fs_kzalloc(sbi, sizeof(struct flush_cmd_control), GFP_KERNEL);
Gu Zheng2163d192014-04-27 14:21:33 +0800677 if (!fcc)
678 return -ENOMEM;
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700679 atomic_set(&fcc->issued_flush, 0);
680 atomic_set(&fcc->issing_flush, 0);
Gu Zheng2163d192014-04-27 14:21:33 +0800681 init_waitqueue_head(&fcc->flush_wait_queue);
Gu Zheng721bd4d2014-09-05 18:31:00 +0800682 init_llist_head(&fcc->issue_list);
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700683 SM_I(sbi)->fcc_info = fcc;
Yunlei Head9baf42017-06-01 16:43:51 +0800684 if (!test_opt(sbi, FLUSH_MERGE))
685 return err;
686
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700687init_thread:
Gu Zheng2163d192014-04-27 14:21:33 +0800688 fcc->f2fs_issue_flush = kthread_run(issue_flush_thread, sbi,
689 "f2fs_flush-%u:%u", MAJOR(dev), MINOR(dev));
690 if (IS_ERR(fcc->f2fs_issue_flush)) {
691 err = PTR_ERR(fcc->f2fs_issue_flush);
692 kfree(fcc);
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700693 SM_I(sbi)->fcc_info = NULL;
Gu Zheng2163d192014-04-27 14:21:33 +0800694 return err;
695 }
Gu Zheng2163d192014-04-27 14:21:33 +0800696
697 return err;
698}
699
Chao Yu6b4d6a82018-05-30 00:20:41 +0800700void f2fs_destroy_flush_cmd_control(struct f2fs_sb_info *sbi, bool free)
Gu Zheng2163d192014-04-27 14:21:33 +0800701{
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700702 struct flush_cmd_control *fcc = SM_I(sbi)->fcc_info;
Gu Zheng2163d192014-04-27 14:21:33 +0800703
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700704 if (fcc && fcc->f2fs_issue_flush) {
705 struct task_struct *flush_thread = fcc->f2fs_issue_flush;
706
707 fcc->f2fs_issue_flush = NULL;
708 kthread_stop(flush_thread);
709 }
710 if (free) {
711 kfree(fcc);
712 SM_I(sbi)->fcc_info = NULL;
713 }
Gu Zheng2163d192014-04-27 14:21:33 +0800714}
715
Chao Yufd6422e2017-09-29 13:59:39 +0800716int f2fs_flush_device_cache(struct f2fs_sb_info *sbi)
717{
718 int ret = 0, i;
719
720 if (!sbi->s_ndevs)
721 return 0;
722
723 for (i = 1; i < sbi->s_ndevs; i++) {
724 if (!f2fs_test_bit(i, (char *)&sbi->dirty_device))
725 continue;
726 ret = __submit_flush_wait(sbi, FDEV(i).bdev);
727 if (ret)
728 break;
729
730 spin_lock(&sbi->dev_lock);
731 f2fs_clear_bit(i, (char *)&sbi->dirty_device);
732 spin_unlock(&sbi->dev_lock);
733 }
734
735 return ret;
736}
737
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900738static void __locate_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno,
739 enum dirty_type dirty_type)
740{
741 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
742
743 /* need not be added */
744 if (IS_CURSEG(sbi, segno))
745 return;
746
747 if (!test_and_set_bit(segno, dirty_i->dirty_segmap[dirty_type]))
748 dirty_i->nr_dirty[dirty_type]++;
749
750 if (dirty_type == DIRTY) {
751 struct seg_entry *sentry = get_seg_entry(sbi, segno);
Changman Lee4625d6a2013-10-25 17:31:57 +0900752 enum dirty_type t = sentry->type;
Jaegeuk Kimb2f2c392013-04-01 13:52:09 +0900753
Jaegeuk Kimec325b52014-09-02 16:24:11 -0700754 if (unlikely(t >= DIRTY)) {
755 f2fs_bug_on(sbi, 1);
756 return;
757 }
Changman Lee4625d6a2013-10-25 17:31:57 +0900758 if (!test_and_set_bit(segno, dirty_i->dirty_segmap[t]))
759 dirty_i->nr_dirty[t]++;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900760 }
761}
762
763static void __remove_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno,
764 enum dirty_type dirty_type)
765{
766 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
767
768 if (test_and_clear_bit(segno, dirty_i->dirty_segmap[dirty_type]))
769 dirty_i->nr_dirty[dirty_type]--;
770
771 if (dirty_type == DIRTY) {
Changman Lee4625d6a2013-10-25 17:31:57 +0900772 struct seg_entry *sentry = get_seg_entry(sbi, segno);
773 enum dirty_type t = sentry->type;
Jaegeuk Kimb2f2c392013-04-01 13:52:09 +0900774
Changman Lee4625d6a2013-10-25 17:31:57 +0900775 if (test_and_clear_bit(segno, dirty_i->dirty_segmap[t]))
776 dirty_i->nr_dirty[t]--;
Jaegeuk Kimb2f2c392013-04-01 13:52:09 +0900777
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700778 if (get_valid_blocks(sbi, segno, true) == 0)
779 clear_bit(GET_SEC_FROM_SEG(sbi, segno),
Jaegeuk Kim5ec4e492013-03-31 13:26:03 +0900780 dirty_i->victim_secmap);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900781 }
782}
783
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +0900784/*
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900785 * Should not occur error such as -ENOMEM.
786 * Adding dirty entry into seglist is not critical operation.
787 * If a given segment is one of current working segments, it won't be added.
788 */
Haicheng Li8d8451a2013-06-13 16:59:28 +0800789static void locate_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900790{
791 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
792 unsigned short valid_blocks;
793
794 if (segno == NULL_SEGNO || IS_CURSEG(sbi, segno))
795 return;
796
797 mutex_lock(&dirty_i->seglist_lock);
798
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700799 valid_blocks = get_valid_blocks(sbi, segno, false);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900800
801 if (valid_blocks == 0) {
802 __locate_dirty_segment(sbi, segno, PRE);
803 __remove_dirty_segment(sbi, segno, DIRTY);
804 } else if (valid_blocks < sbi->blocks_per_seg) {
805 __locate_dirty_segment(sbi, segno, DIRTY);
806 } else {
807 /* Recovery routine with SSR needs this */
808 __remove_dirty_segment(sbi, segno, DIRTY);
809 }
810
811 mutex_unlock(&dirty_i->seglist_lock);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900812}
813
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700814static struct discard_cmd *__create_discard_cmd(struct f2fs_sb_info *sbi,
815 struct block_device *bdev, block_t lstart,
816 block_t start, block_t len)
Chao Yu275b66b2016-08-29 23:58:34 +0800817{
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700818 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
819 struct list_head *pend_list;
820 struct discard_cmd *dc;
Chao Yu275b66b2016-08-29 23:58:34 +0800821
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700822 f2fs_bug_on(sbi, !len);
Chao Yu275b66b2016-08-29 23:58:34 +0800823
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700824 pend_list = &dcc->pend_list[plist_idx(len)];
825
826 dc = f2fs_kmem_cache_alloc(discard_cmd_slab, GFP_NOFS);
827 INIT_LIST_HEAD(&dc->list);
828 dc->bdev = bdev;
829 dc->lstart = lstart;
830 dc->start = start;
831 dc->len = len;
832 dc->ref = 0;
833 dc->state = D_PREP;
834 dc->error = 0;
835 init_completion(&dc->wait);
836 list_add_tail(&dc->list, pend_list);
837 atomic_inc(&dcc->discard_cmd_cnt);
838 dcc->undiscard_blks += len;
839
840 return dc;
Chao Yu275b66b2016-08-29 23:58:34 +0800841}
842
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700843static struct discard_cmd *__attach_discard_cmd(struct f2fs_sb_info *sbi,
844 struct block_device *bdev, block_t lstart,
845 block_t start, block_t len,
846 struct rb_node *parent, struct rb_node **p)
Chao Yu275b66b2016-08-29 23:58:34 +0800847{
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700848 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
849 struct discard_cmd *dc;
Chao Yu275b66b2016-08-29 23:58:34 +0800850
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700851 dc = __create_discard_cmd(sbi, bdev, lstart, start, len);
Chao Yu275b66b2016-08-29 23:58:34 +0800852
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700853 rb_link_node(&dc->rb_node, parent, p);
854 rb_insert_color(&dc->rb_node, &dcc->root);
Chao Yu275b66b2016-08-29 23:58:34 +0800855
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700856 return dc;
Chao Yu275b66b2016-08-29 23:58:34 +0800857}
858
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700859static void __detach_discard_cmd(struct discard_cmd_control *dcc,
860 struct discard_cmd *dc)
Chao Yu275b66b2016-08-29 23:58:34 +0800861{
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700862 if (dc->state == D_DONE)
863 atomic_dec(&dcc->issing_discard);
Chao Yu275b66b2016-08-29 23:58:34 +0800864
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700865 list_del(&dc->list);
866 rb_erase(&dc->rb_node, &dcc->root);
867 dcc->undiscard_blks -= dc->len;
868
869 kmem_cache_free(discard_cmd_slab, dc);
870
871 atomic_dec(&dcc->discard_cmd_cnt);
872}
873
874static void __remove_discard_cmd(struct f2fs_sb_info *sbi,
875 struct discard_cmd *dc)
876{
877 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
878
Chao Yu8258fd32017-10-04 09:08:36 +0800879 trace_f2fs_remove_discard(dc->bdev, dc->start, dc->len);
880
Chao Yueb6c48e2017-06-05 18:29:07 +0800881 f2fs_bug_on(sbi, dc->ref);
882
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700883 if (dc->error == -EOPNOTSUPP)
884 dc->error = 0;
885
886 if (dc->error)
887 f2fs_msg(sbi->sb, KERN_INFO,
Chao Yufa681212017-05-19 23:46:43 +0800888 "Issue discard(%u, %u, %u) failed, ret: %d",
889 dc->lstart, dc->start, dc->len, dc->error);
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700890 __detach_discard_cmd(dcc, dc);
891}
892
893static void f2fs_submit_discard_endio(struct bio *bio)
894{
895 struct discard_cmd *dc = (struct discard_cmd *)bio->bi_private;
896
897 dc->error = bio->bi_error;
898 dc->state = D_DONE;
Chao Yub1f5c762017-05-19 23:46:44 +0800899 complete_all(&dc->wait);
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700900 bio_put(bio);
Chao Yu275b66b2016-08-29 23:58:34 +0800901}
902
Wei Yongjun02cfdab2018-01-05 09:41:20 +0000903static void __check_sit_bitmap(struct f2fs_sb_info *sbi,
Chao Yu280fd0f2017-06-30 17:19:02 +0800904 block_t start, block_t end)
905{
906#ifdef CONFIG_F2FS_CHECK_FS
907 struct seg_entry *sentry;
908 unsigned int segno;
909 block_t blk = start;
910 unsigned long offset, size, max_blocks = sbi->blocks_per_seg;
911 unsigned long *map;
912
913 while (blk < end) {
914 segno = GET_SEGNO(sbi, blk);
915 sentry = get_seg_entry(sbi, segno);
916 offset = GET_BLKOFF_FROM_SEG0(sbi, blk);
917
Yunlong Song55824ab2017-08-04 17:07:15 +0800918 if (end < START_BLOCK(sbi, segno + 1))
919 size = GET_BLKOFF_FROM_SEG0(sbi, end);
920 else
921 size = max_blocks;
Chao Yu280fd0f2017-06-30 17:19:02 +0800922 map = (unsigned long *)(sentry->cur_valid_map);
923 offset = __find_rev_next_bit(map, size, offset);
924 f2fs_bug_on(sbi, offset != size);
Yunlong Song55824ab2017-08-04 17:07:15 +0800925 blk = START_BLOCK(sbi, segno + 1);
Chao Yu280fd0f2017-06-30 17:19:02 +0800926 }
927#endif
928}
929
Jaegeuk Kim41059092018-05-29 09:58:42 -0700930static void __init_discard_policy(struct f2fs_sb_info *sbi,
931 struct discard_policy *dpolicy,
932 int discard_type, unsigned int granularity)
933{
934 /* common policy */
935 dpolicy->type = discard_type;
936 dpolicy->sync = true;
937 dpolicy->granularity = granularity;
938
939 dpolicy->max_requests = DEF_MAX_DISCARD_REQUEST;
940 dpolicy->io_aware_gran = MAX_PLIST_NUM;
941
942 if (discard_type == DPOLICY_BG) {
943 dpolicy->min_interval = DEF_MIN_DISCARD_ISSUE_TIME;
Yunlei He8d74ddc2018-04-08 15:11:11 +0800944 dpolicy->mid_interval = DEF_MID_DISCARD_ISSUE_TIME;
Jaegeuk Kim41059092018-05-29 09:58:42 -0700945 dpolicy->max_interval = DEF_MAX_DISCARD_ISSUE_TIME;
946 dpolicy->io_aware = true;
Chao Yucea3ae52018-04-10 15:43:09 +0800947 dpolicy->sync = false;
Jaegeuk Kim41059092018-05-29 09:58:42 -0700948 if (utilization(sbi) > DEF_DISCARD_URGENT_UTIL) {
949 dpolicy->granularity = 1;
950 dpolicy->max_interval = DEF_MIN_DISCARD_ISSUE_TIME;
951 }
952 } else if (discard_type == DPOLICY_FORCE) {
953 dpolicy->min_interval = DEF_MIN_DISCARD_ISSUE_TIME;
Yunlei He8d74ddc2018-04-08 15:11:11 +0800954 dpolicy->mid_interval = DEF_MID_DISCARD_ISSUE_TIME;
Jaegeuk Kim41059092018-05-29 09:58:42 -0700955 dpolicy->max_interval = DEF_MAX_DISCARD_ISSUE_TIME;
956 dpolicy->io_aware = false;
957 } else if (discard_type == DPOLICY_FSTRIM) {
958 dpolicy->io_aware = false;
959 } else if (discard_type == DPOLICY_UMOUNT) {
Yunlei Headdb4482018-04-04 17:29:05 +0800960 dpolicy->max_requests = UINT_MAX;
Jaegeuk Kim41059092018-05-29 09:58:42 -0700961 dpolicy->io_aware = false;
962 }
963}
964
965
Chao Yu275b66b2016-08-29 23:58:34 +0800966/* this function is copied from blkdev_issue_discard from block/blk-lib.c */
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700967static void __submit_discard_cmd(struct f2fs_sb_info *sbi,
Chao Yudaf437d2017-10-04 09:08:34 +0800968 struct discard_policy *dpolicy,
969 struct discard_cmd *dc)
Chao Yu275b66b2016-08-29 23:58:34 +0800970{
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700971 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
Chao Yudaf437d2017-10-04 09:08:34 +0800972 struct list_head *wait_list = (dpolicy->type == DPOLICY_FSTRIM) ?
973 &(dcc->fstrim_list) : &(dcc->wait_list);
Chao Yu275b66b2016-08-29 23:58:34 +0800974 struct bio *bio = NULL;
Chao Yudaf437d2017-10-04 09:08:34 +0800975 int flag = dpolicy->sync ? REQ_SYNC : 0;
Chao Yu275b66b2016-08-29 23:58:34 +0800976
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700977 if (dc->state != D_PREP)
978 return;
Chao Yu275b66b2016-08-29 23:58:34 +0800979
Yunlei He198f6372018-04-13 11:08:05 +0800980 if (is_sbi_flag_set(sbi, SBI_NEED_FSCK))
981 return;
982
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700983 trace_f2fs_issue_discard(dc->bdev, dc->start, dc->len);
984
985 dc->error = __blkdev_issue_discard(dc->bdev,
986 SECTOR_FROM_BLOCK(dc->start),
987 SECTOR_FROM_BLOCK(dc->len),
988 GFP_NOFS, 0, &bio);
989 if (!dc->error) {
990 /* should keep before submission to avoid D_DONE right away */
991 dc->state = D_SUBMIT;
992 atomic_inc(&dcc->issued_discard);
993 atomic_inc(&dcc->issing_discard);
994 if (bio) {
995 bio->bi_private = dc;
996 bio->bi_end_io = f2fs_submit_discard_endio;
Chao Yu69a59672017-10-04 09:08:33 +0800997 bio->bi_opf |= flag;
Jaegeuk Kime6b120d2017-07-10 12:55:09 -0700998 submit_bio(bio);
Chao Yu28e10232017-10-04 09:08:32 +0800999 list_move_tail(&dc->list, wait_list);
Chao Yu280fd0f2017-06-30 17:19:02 +08001000 __check_sit_bitmap(sbi, dc->start, dc->start + dc->len);
Chao Yuc0fe4882017-08-02 23:21:48 +08001001
1002 f2fs_update_iostat(sbi, FS_DISCARD, 1);
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001003 }
1004 } else {
1005 __remove_discard_cmd(sbi, dc);
1006 }
1007}
1008
1009static struct discard_cmd *__insert_discard_tree(struct f2fs_sb_info *sbi,
1010 struct block_device *bdev, block_t lstart,
1011 block_t start, block_t len,
1012 struct rb_node **insert_p,
1013 struct rb_node *insert_parent)
1014{
1015 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
Colin Ian King872d8e32017-10-19 12:58:21 +02001016 struct rb_node **p;
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001017 struct rb_node *parent = NULL;
1018 struct discard_cmd *dc = NULL;
1019
1020 if (insert_p && insert_parent) {
1021 parent = insert_parent;
1022 p = insert_p;
1023 goto do_insert;
Chao Yu275b66b2016-08-29 23:58:34 +08001024 }
1025
Chao Yu6b4d6a82018-05-30 00:20:41 +08001026 p = f2fs_lookup_rb_tree_for_insert(sbi, &dcc->root, &parent, lstart);
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001027do_insert:
1028 dc = __attach_discard_cmd(sbi, bdev, lstart, start, len, parent, p);
1029 if (!dc)
1030 return NULL;
1031
1032 return dc;
1033}
1034
1035static void __relocate_discard_cmd(struct discard_cmd_control *dcc,
1036 struct discard_cmd *dc)
1037{
1038 list_move_tail(&dc->list, &dcc->pend_list[plist_idx(dc->len)]);
1039}
1040
1041static void __punch_discard_cmd(struct f2fs_sb_info *sbi,
1042 struct discard_cmd *dc, block_t blkaddr)
1043{
1044 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
1045 struct discard_info di = dc->di;
1046 bool modified = false;
1047
1048 if (dc->state == D_DONE || dc->len == 1) {
1049 __remove_discard_cmd(sbi, dc);
1050 return;
1051 }
1052
1053 dcc->undiscard_blks -= di.len;
1054
1055 if (blkaddr > di.lstart) {
1056 dc->len = blkaddr - dc->lstart;
1057 dcc->undiscard_blks += dc->len;
1058 __relocate_discard_cmd(dcc, dc);
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001059 modified = true;
1060 }
1061
1062 if (blkaddr < di.lstart + di.len - 1) {
1063 if (modified) {
1064 __insert_discard_tree(sbi, dc->bdev, blkaddr + 1,
1065 di.start + blkaddr + 1 - di.lstart,
1066 di.lstart + di.len - 1 - blkaddr,
1067 NULL, NULL);
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001068 } else {
1069 dc->lstart++;
1070 dc->len--;
1071 dc->start++;
1072 dcc->undiscard_blks += dc->len;
1073 __relocate_discard_cmd(dcc, dc);
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001074 }
1075 }
1076}
1077
1078static void __update_discard_tree_range(struct f2fs_sb_info *sbi,
1079 struct block_device *bdev, block_t lstart,
1080 block_t start, block_t len)
1081{
1082 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
1083 struct discard_cmd *prev_dc = NULL, *next_dc = NULL;
1084 struct discard_cmd *dc;
1085 struct discard_info di = {0};
1086 struct rb_node **insert_p = NULL, *insert_parent = NULL;
1087 block_t end = lstart + len;
1088
1089 mutex_lock(&dcc->cmd_lock);
1090
Chao Yu6b4d6a82018-05-30 00:20:41 +08001091 dc = (struct discard_cmd *)f2fs_lookup_rb_tree_ret(&dcc->root,
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001092 NULL, lstart,
1093 (struct rb_entry **)&prev_dc,
1094 (struct rb_entry **)&next_dc,
1095 &insert_p, &insert_parent, true);
1096 if (dc)
1097 prev_dc = dc;
1098
1099 if (!prev_dc) {
1100 di.lstart = lstart;
1101 di.len = next_dc ? next_dc->lstart - lstart : len;
1102 di.len = min(di.len, len);
1103 di.start = start;
1104 }
1105
1106 while (1) {
1107 struct rb_node *node;
1108 bool merged = false;
1109 struct discard_cmd *tdc = NULL;
1110
1111 if (prev_dc) {
1112 di.lstart = prev_dc->lstart + prev_dc->len;
1113 if (di.lstart < lstart)
1114 di.lstart = lstart;
1115 if (di.lstart >= end)
1116 break;
1117
1118 if (!next_dc || next_dc->lstart > end)
1119 di.len = end - di.lstart;
1120 else
1121 di.len = next_dc->lstart - di.lstart;
1122 di.start = start + di.lstart - lstart;
1123 }
1124
1125 if (!di.len)
1126 goto next;
1127
1128 if (prev_dc && prev_dc->state == D_PREP &&
1129 prev_dc->bdev == bdev &&
1130 __is_discard_back_mergeable(&di, &prev_dc->di)) {
1131 prev_dc->di.len += di.len;
1132 dcc->undiscard_blks += di.len;
1133 __relocate_discard_cmd(dcc, prev_dc);
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001134 di = prev_dc->di;
1135 tdc = prev_dc;
1136 merged = true;
1137 }
1138
1139 if (next_dc && next_dc->state == D_PREP &&
1140 next_dc->bdev == bdev &&
1141 __is_discard_front_mergeable(&di, &next_dc->di)) {
1142 next_dc->di.lstart = di.lstart;
1143 next_dc->di.len += di.len;
1144 next_dc->di.start = di.start;
1145 dcc->undiscard_blks += di.len;
1146 __relocate_discard_cmd(dcc, next_dc);
1147 if (tdc)
1148 __remove_discard_cmd(sbi, tdc);
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001149 merged = true;
1150 }
1151
1152 if (!merged) {
1153 __insert_discard_tree(sbi, bdev, di.lstart, di.start,
1154 di.len, NULL, NULL);
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001155 }
1156 next:
1157 prev_dc = next_dc;
1158 if (!prev_dc)
1159 break;
1160
1161 node = rb_next(&prev_dc->rb_node);
1162 next_dc = rb_entry_safe(node, struct discard_cmd, rb_node);
1163 }
1164
1165 mutex_unlock(&dcc->cmd_lock);
1166}
1167
1168static int __queue_discard_cmd(struct f2fs_sb_info *sbi,
1169 struct block_device *bdev, block_t blkstart, block_t blklen)
1170{
1171 block_t lblkstart = blkstart;
1172
1173 trace_f2fs_queue_discard(bdev, blkstart, blklen);
1174
1175 if (sbi->s_ndevs) {
1176 int devi = f2fs_target_device_index(sbi, blkstart);
1177
1178 blkstart -= FDEV(devi).start_blk;
1179 }
1180 __update_discard_tree_range(sbi, bdev, lblkstart, blkstart, blklen);
1181 return 0;
1182}
1183
Chao Yudaf437d2017-10-04 09:08:34 +08001184static int __issue_discard_cmd(struct f2fs_sb_info *sbi,
1185 struct discard_policy *dpolicy)
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001186{
1187 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
1188 struct list_head *pend_list;
1189 struct discard_cmd *dc, *tmp;
1190 struct blk_plug plug;
Chao Yudaf437d2017-10-04 09:08:34 +08001191 int i, iter = 0, issued = 0;
Chao Yu30da3a42017-09-12 21:35:12 +08001192 bool io_interrupted = false;
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001193
Chao Yudaf437d2017-10-04 09:08:34 +08001194 for (i = MAX_PLIST_NUM - 1; i >= 0; i--) {
1195 if (i + 1 < dpolicy->granularity)
1196 break;
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001197 pend_list = &dcc->pend_list[i];
Chao Yu6c46b372017-10-04 09:08:35 +08001198
1199 mutex_lock(&dcc->cmd_lock);
Chao Yu37d4ca72018-01-08 18:48:33 +08001200 if (list_empty(pend_list))
1201 goto next;
Chao Yu6b4d6a82018-05-30 00:20:41 +08001202 f2fs_bug_on(sbi,
1203 !f2fs_check_rb_tree_consistence(sbi, &dcc->root));
Chao Yu6c46b372017-10-04 09:08:35 +08001204 blk_start_plug(&plug);
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001205 list_for_each_entry_safe(dc, tmp, pend_list, list) {
1206 f2fs_bug_on(sbi, dc->state != D_PREP);
1207
Chao Yu69a59672017-10-04 09:08:33 +08001208 if (dpolicy->io_aware && i < dpolicy->io_aware_gran &&
1209 !is_idle(sbi)) {
Chao Yu30da3a42017-09-12 21:35:12 +08001210 io_interrupted = true;
Chao Yu69a59672017-10-04 09:08:33 +08001211 goto skip;
Chao Yu30da3a42017-09-12 21:35:12 +08001212 }
1213
Chao Yudaf437d2017-10-04 09:08:34 +08001214 __submit_discard_cmd(sbi, dpolicy, dc);
Chao Yu69a59672017-10-04 09:08:33 +08001215 issued++;
1216skip:
1217 if (++iter >= dpolicy->max_requests)
Chao Yu6c46b372017-10-04 09:08:35 +08001218 break;
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001219 }
Chao Yu6c46b372017-10-04 09:08:35 +08001220 blk_finish_plug(&plug);
Chao Yu37d4ca72018-01-08 18:48:33 +08001221next:
Chao Yu6c46b372017-10-04 09:08:35 +08001222 mutex_unlock(&dcc->cmd_lock);
1223
1224 if (iter >= dpolicy->max_requests)
1225 break;
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001226 }
Chao Yuefe24da2017-08-07 23:09:56 +08001227
Chao Yu30da3a42017-09-12 21:35:12 +08001228 if (!issued && io_interrupted)
1229 issued = -1;
1230
Chao Yuefe24da2017-08-07 23:09:56 +08001231 return issued;
1232}
1233
Chao Yu1e5305a2017-10-04 09:08:37 +08001234static bool __drop_discard_cmd(struct f2fs_sb_info *sbi)
Chao Yuefe24da2017-08-07 23:09:56 +08001235{
1236 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
1237 struct list_head *pend_list;
1238 struct discard_cmd *dc, *tmp;
1239 int i;
Chao Yu1e5305a2017-10-04 09:08:37 +08001240 bool dropped = false;
Chao Yuefe24da2017-08-07 23:09:56 +08001241
1242 mutex_lock(&dcc->cmd_lock);
1243 for (i = MAX_PLIST_NUM - 1; i >= 0; i--) {
1244 pend_list = &dcc->pend_list[i];
1245 list_for_each_entry_safe(dc, tmp, pend_list, list) {
1246 f2fs_bug_on(sbi, dc->state != D_PREP);
1247 __remove_discard_cmd(sbi, dc);
Chao Yu1e5305a2017-10-04 09:08:37 +08001248 dropped = true;
Chao Yuefe24da2017-08-07 23:09:56 +08001249 }
1250 }
1251 mutex_unlock(&dcc->cmd_lock);
Chao Yu1e5305a2017-10-04 09:08:37 +08001252
1253 return dropped;
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001254}
1255
Chao Yu6b4d6a82018-05-30 00:20:41 +08001256void f2fs_drop_discard_cmd(struct f2fs_sb_info *sbi)
Chao Yu1a3b0042018-01-18 17:23:29 +08001257{
1258 __drop_discard_cmd(sbi);
1259}
1260
Chao Yuab302042017-10-28 16:52:32 +08001261static unsigned int __wait_one_discard_bio(struct f2fs_sb_info *sbi,
Chao Yua7aa97d2017-06-05 18:29:06 +08001262 struct discard_cmd *dc)
1263{
1264 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
Chao Yuab302042017-10-28 16:52:32 +08001265 unsigned int len = 0;
Chao Yua7aa97d2017-06-05 18:29:06 +08001266
1267 wait_for_completion_io(&dc->wait);
1268 mutex_lock(&dcc->cmd_lock);
1269 f2fs_bug_on(sbi, dc->state != D_DONE);
1270 dc->ref--;
Chao Yuab302042017-10-28 16:52:32 +08001271 if (!dc->ref) {
1272 if (!dc->error)
1273 len = dc->len;
Chao Yua7aa97d2017-06-05 18:29:06 +08001274 __remove_discard_cmd(sbi, dc);
Chao Yuab302042017-10-28 16:52:32 +08001275 }
Chao Yua7aa97d2017-06-05 18:29:06 +08001276 mutex_unlock(&dcc->cmd_lock);
Chao Yuab302042017-10-28 16:52:32 +08001277
1278 return len;
Chao Yua7aa97d2017-06-05 18:29:06 +08001279}
1280
Chao Yuab302042017-10-28 16:52:32 +08001281static unsigned int __wait_discard_cmd_range(struct f2fs_sb_info *sbi,
Chao Yudaf437d2017-10-04 09:08:34 +08001282 struct discard_policy *dpolicy,
1283 block_t start, block_t end)
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001284{
1285 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
Chao Yudaf437d2017-10-04 09:08:34 +08001286 struct list_head *wait_list = (dpolicy->type == DPOLICY_FSTRIM) ?
1287 &(dcc->fstrim_list) : &(dcc->wait_list);
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001288 struct discard_cmd *dc, *tmp;
Chao Yu3215e782017-05-19 23:46:45 +08001289 bool need_wait;
Chao Yuab302042017-10-28 16:52:32 +08001290 unsigned int trimmed = 0;
Chao Yu3215e782017-05-19 23:46:45 +08001291
1292next:
1293 need_wait = false;
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001294
1295 mutex_lock(&dcc->cmd_lock);
1296 list_for_each_entry_safe(dc, tmp, wait_list, list) {
Chao Yu28e10232017-10-04 09:08:32 +08001297 if (dc->lstart + dc->len <= start || end <= dc->lstart)
1298 continue;
Chao Yudaf437d2017-10-04 09:08:34 +08001299 if (dc->len < dpolicy->granularity)
Chao Yu28e10232017-10-04 09:08:32 +08001300 continue;
Chao Yudaf437d2017-10-04 09:08:34 +08001301 if (dc->state == D_DONE && !dc->ref) {
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001302 wait_for_completion_io(&dc->wait);
Chao Yuab302042017-10-28 16:52:32 +08001303 if (!dc->error)
1304 trimmed += dc->len;
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001305 __remove_discard_cmd(sbi, dc);
Chao Yu3215e782017-05-19 23:46:45 +08001306 } else {
1307 dc->ref++;
1308 need_wait = true;
1309 break;
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001310 }
1311 }
1312 mutex_unlock(&dcc->cmd_lock);
Chao Yu3215e782017-05-19 23:46:45 +08001313
1314 if (need_wait) {
Chao Yuab302042017-10-28 16:52:32 +08001315 trimmed += __wait_one_discard_bio(sbi, dc);
Chao Yu3215e782017-05-19 23:46:45 +08001316 goto next;
1317 }
Chao Yuab302042017-10-28 16:52:32 +08001318
1319 return trimmed;
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001320}
1321
Chao Yudaf437d2017-10-04 09:08:34 +08001322static void __wait_all_discard_cmd(struct f2fs_sb_info *sbi,
1323 struct discard_policy *dpolicy)
Chao Yu28e10232017-10-04 09:08:32 +08001324{
Jaegeuk Kim8f6a2e72018-05-24 13:57:26 -07001325 struct discard_policy dp;
1326
1327 if (dpolicy) {
1328 __wait_discard_cmd_range(sbi, dpolicy, 0, UINT_MAX);
1329 return;
1330 }
1331
1332 /* wait all */
Jaegeuk Kim41059092018-05-29 09:58:42 -07001333 __init_discard_policy(sbi, &dp, DPOLICY_FSTRIM, 1);
Jaegeuk Kim8f6a2e72018-05-24 13:57:26 -07001334 __wait_discard_cmd_range(sbi, &dp, 0, UINT_MAX);
Jaegeuk Kim41059092018-05-29 09:58:42 -07001335 __init_discard_policy(sbi, &dp, DPOLICY_UMOUNT, 1);
Jaegeuk Kim8f6a2e72018-05-24 13:57:26 -07001336 __wait_discard_cmd_range(sbi, &dp, 0, UINT_MAX);
Chao Yu28e10232017-10-04 09:08:32 +08001337}
1338
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001339/* This should be covered by global mutex, &sit_i->sentry_lock */
Wei Yongjun02cfdab2018-01-05 09:41:20 +00001340static void f2fs_wait_discard_bio(struct f2fs_sb_info *sbi, block_t blkaddr)
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001341{
1342 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
1343 struct discard_cmd *dc;
1344 bool need_wait = false;
1345
1346 mutex_lock(&dcc->cmd_lock);
Chao Yu6b4d6a82018-05-30 00:20:41 +08001347 dc = (struct discard_cmd *)f2fs_lookup_rb_tree(&dcc->root,
1348 NULL, blkaddr);
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001349 if (dc) {
1350 if (dc->state == D_PREP) {
1351 __punch_discard_cmd(sbi, dc, blkaddr);
1352 } else {
1353 dc->ref++;
1354 need_wait = true;
1355 }
1356 }
1357 mutex_unlock(&dcc->cmd_lock);
1358
Chao Yua7aa97d2017-06-05 18:29:06 +08001359 if (need_wait)
1360 __wait_one_discard_bio(sbi, dc);
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001361}
1362
Chao Yu6b4d6a82018-05-30 00:20:41 +08001363void f2fs_stop_discard_thread(struct f2fs_sb_info *sbi)
Chao Yud9d85cc2017-06-29 23:17:45 +08001364{
1365 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
1366
1367 if (dcc && dcc->f2fs_issue_discard) {
1368 struct task_struct *discard_thread = dcc->f2fs_issue_discard;
1369
1370 dcc->f2fs_issue_discard = NULL;
1371 kthread_stop(discard_thread);
1372 }
1373}
1374
Chao Yu28e10232017-10-04 09:08:32 +08001375/* This comes from f2fs_put_super */
Chao Yu1e5305a2017-10-04 09:08:37 +08001376bool f2fs_wait_discard_bios(struct f2fs_sb_info *sbi)
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001377{
Chao Yuefe24da2017-08-07 23:09:56 +08001378 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
Chao Yudaf437d2017-10-04 09:08:34 +08001379 struct discard_policy dpolicy;
Chao Yu1e5305a2017-10-04 09:08:37 +08001380 bool dropped;
Chao Yuefe24da2017-08-07 23:09:56 +08001381
Jaegeuk Kim41059092018-05-29 09:58:42 -07001382 __init_discard_policy(sbi, &dpolicy, DPOLICY_UMOUNT,
1383 dcc->discard_granularity);
Chao Yudaf437d2017-10-04 09:08:34 +08001384 __issue_discard_cmd(sbi, &dpolicy);
Chao Yu1e5305a2017-10-04 09:08:37 +08001385 dropped = __drop_discard_cmd(sbi);
Chao Yu1e5305a2017-10-04 09:08:37 +08001386
Jaegeuk Kim8f6a2e72018-05-24 13:57:26 -07001387 /* just to make sure there is no pending discard commands */
1388 __wait_all_discard_cmd(sbi, NULL);
Chao Yu1e5305a2017-10-04 09:08:37 +08001389 return dropped;
Chao Yuefe24da2017-08-07 23:09:56 +08001390}
1391
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001392static int issue_discard_thread(void *data)
1393{
1394 struct f2fs_sb_info *sbi = data;
1395 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
1396 wait_queue_head_t *q = &dcc->discard_wait_queue;
Chao Yudaf437d2017-10-04 09:08:34 +08001397 struct discard_policy dpolicy;
Chao Yuefe24da2017-08-07 23:09:56 +08001398 unsigned int wait_ms = DEF_MIN_DISCARD_ISSUE_TIME;
1399 int issued;
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001400
Jaegeuk Kimd430af22017-05-17 10:36:58 -07001401 set_freezable();
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001402
Jaegeuk Kimd430af22017-05-17 10:36:58 -07001403 do {
Jaegeuk Kim41059092018-05-29 09:58:42 -07001404 __init_discard_policy(sbi, &dpolicy, DPOLICY_BG,
Chao Yudaf437d2017-10-04 09:08:34 +08001405 dcc->discard_granularity);
1406
Chao Yuefe24da2017-08-07 23:09:56 +08001407 wait_event_interruptible_timeout(*q,
1408 kthread_should_stop() || freezing(current) ||
1409 dcc->discard_wake,
1410 msecs_to_jiffies(wait_ms));
Sheng Yong5bc68f32018-05-08 17:51:34 +08001411
1412 if (dcc->discard_wake)
1413 dcc->discard_wake = 0;
1414
Jaegeuk Kimd430af22017-05-17 10:36:58 -07001415 if (try_to_freeze())
1416 continue;
Chao Yu6393cef2018-01-25 18:57:27 +08001417 if (f2fs_readonly(sbi->sb))
1418 continue;
Jaegeuk Kimd430af22017-05-17 10:36:58 -07001419 if (kthread_should_stop())
1420 return 0;
Yunlei He198f6372018-04-13 11:08:05 +08001421 if (is_sbi_flag_set(sbi, SBI_NEED_FSCK)) {
1422 wait_ms = dpolicy.max_interval;
1423 continue;
1424 }
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001425
Jaegeuk Kim0390d832018-05-07 14:22:40 -07001426 if (sbi->gc_mode == GC_URGENT)
Jaegeuk Kim41059092018-05-29 09:58:42 -07001427 __init_discard_policy(sbi, &dpolicy, DPOLICY_FORCE, 1);
Chao Yuefe24da2017-08-07 23:09:56 +08001428
Chao Yuce8bd4b2017-07-22 08:52:23 +08001429 sb_start_intwrite(sbi->sb);
1430
Chao Yudaf437d2017-10-04 09:08:34 +08001431 issued = __issue_discard_cmd(sbi, &dpolicy);
Yunlei He8d74ddc2018-04-08 15:11:11 +08001432 if (issued > 0) {
Chao Yudaf437d2017-10-04 09:08:34 +08001433 __wait_all_discard_cmd(sbi, &dpolicy);
1434 wait_ms = dpolicy.min_interval;
Yunlei He8d74ddc2018-04-08 15:11:11 +08001435 } else if (issued == -1){
1436 wait_ms = dpolicy.mid_interval;
Chao Yuefe24da2017-08-07 23:09:56 +08001437 } else {
Chao Yudaf437d2017-10-04 09:08:34 +08001438 wait_ms = dpolicy.max_interval;
Chao Yuefe24da2017-08-07 23:09:56 +08001439 }
Jaegeuk Kimd430af22017-05-17 10:36:58 -07001440
Chao Yuce8bd4b2017-07-22 08:52:23 +08001441 sb_end_intwrite(sbi->sb);
1442
Jaegeuk Kimd430af22017-05-17 10:36:58 -07001443 } while (!kthread_should_stop());
1444 return 0;
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001445}
1446
1447#ifdef CONFIG_BLK_DEV_ZONED
1448static int __f2fs_issue_discard_zone(struct f2fs_sb_info *sbi,
1449 struct block_device *bdev, block_t blkstart, block_t blklen)
1450{
1451 sector_t sector, nr_sects;
1452 block_t lblkstart = blkstart;
1453 int devi = 0;
1454
1455 if (sbi->s_ndevs) {
1456 devi = f2fs_target_device_index(sbi, blkstart);
1457 blkstart -= FDEV(devi).start_blk;
1458 }
1459
1460 /*
1461 * We need to know the type of the zone: for conventional zones,
1462 * use regular discard if the drive supports it. For sequential
1463 * zones, reset the zone write pointer.
1464 */
1465 switch (get_blkz_type(sbi, bdev, blkstart)) {
1466
1467 case BLK_ZONE_TYPE_CONVENTIONAL:
1468 if (!blk_queue_discard(bdev_get_queue(bdev)))
1469 return 0;
1470 return __queue_discard_cmd(sbi, bdev, lblkstart, blklen);
1471 case BLK_ZONE_TYPE_SEQWRITE_REQ:
1472 case BLK_ZONE_TYPE_SEQWRITE_PREF:
1473 sector = SECTOR_FROM_BLOCK(blkstart);
1474 nr_sects = SECTOR_FROM_BLOCK(blklen);
1475
1476 if (sector & (bdev_zone_sectors(bdev) - 1) ||
1477 nr_sects != bdev_zone_sectors(bdev)) {
1478 f2fs_msg(sbi->sb, KERN_INFO,
1479 "(%d) %s: Unaligned discard attempted (block %x + %x)",
1480 devi, sbi->s_ndevs ? FDEV(devi).path: "",
1481 blkstart, blklen);
1482 return -EIO;
1483 }
1484 trace_f2fs_issue_reset_zone(bdev, blkstart);
1485 return blkdev_reset_zones(bdev, sector,
1486 nr_sects, GFP_NOFS);
1487 default:
1488 /* Unknown zone type: broken device ? */
1489 return -EIO;
1490 }
1491}
1492#endif
1493
1494static int __issue_discard_async(struct f2fs_sb_info *sbi,
1495 struct block_device *bdev, block_t blkstart, block_t blklen)
1496{
1497#ifdef CONFIG_BLK_DEV_ZONED
Sheng Yong770611e2018-02-06 12:31:17 +08001498 if (f2fs_sb_has_blkzoned(sbi->sb) &&
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001499 bdev_zoned_model(bdev) != BLK_ZONED_NONE)
1500 return __f2fs_issue_discard_zone(sbi, bdev, blkstart, blklen);
1501#endif
1502 return __queue_discard_cmd(sbi, bdev, blkstart, blklen);
Chao Yu275b66b2016-08-29 23:58:34 +08001503}
1504
Jaegeuk Kim1e87a782014-04-15 13:57:55 +09001505static int f2fs_issue_discard(struct f2fs_sb_info *sbi,
Jaegeuk Kim37208872013-11-12 16:55:17 +09001506 block_t blkstart, block_t blklen)
1507{
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001508 sector_t start = blkstart, len = 0;
1509 struct block_device *bdev;
Jaegeuk Kima66cdd92015-04-30 22:37:50 -07001510 struct seg_entry *se;
1511 unsigned int offset;
1512 block_t i;
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001513 int err = 0;
Jaegeuk Kima66cdd92015-04-30 22:37:50 -07001514
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001515 bdev = f2fs_target_device(sbi, blkstart, NULL);
1516
1517 for (i = blkstart; i < blkstart + blklen; i++, len++) {
1518 if (i != start) {
1519 struct block_device *bdev2 =
1520 f2fs_target_device(sbi, i, NULL);
1521
1522 if (bdev2 != bdev) {
1523 err = __issue_discard_async(sbi, bdev,
1524 start, len);
1525 if (err)
1526 return err;
1527 bdev = bdev2;
1528 start = i;
1529 len = 0;
1530 }
1531 }
1532
Jaegeuk Kima66cdd92015-04-30 22:37:50 -07001533 se = get_seg_entry(sbi, GET_SEGNO(sbi, i));
1534 offset = GET_BLKOFF_FROM_SEG0(sbi, i);
1535
1536 if (!f2fs_test_and_set_bit(offset, se->discard_map))
1537 sbi->discard_blks--;
1538 }
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001539
1540 if (len)
1541 err = __issue_discard_async(sbi, bdev, start, len);
1542 return err;
Jaegeuk Kim1e87a782014-04-15 13:57:55 +09001543}
1544
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001545static bool add_discard_addrs(struct f2fs_sb_info *sbi, struct cp_control *cpc,
1546 bool check_only)
Jaegeuk Kimadf49832014-10-28 22:27:59 -07001547{
Jaegeuk Kimb2955552013-11-12 14:49:56 +09001548 int entries = SIT_VBLOCK_MAP_SIZE / sizeof(unsigned long);
1549 int max_blocks = sbi->blocks_per_seg;
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -07001550 struct seg_entry *se = get_seg_entry(sbi, cpc->trim_start);
Jaegeuk Kimb2955552013-11-12 14:49:56 +09001551 unsigned long *cur_map = (unsigned long *)se->cur_valid_map;
1552 unsigned long *ckpt_map = (unsigned long *)se->ckpt_valid_map;
Jaegeuk Kima66cdd92015-04-30 22:37:50 -07001553 unsigned long *discard_map = (unsigned long *)se->discard_map;
Jaegeuk Kim60a3b782015-02-10 16:44:29 -08001554 unsigned long *dmap = SIT_I(sbi)->tmp_map;
Jaegeuk Kimb2955552013-11-12 14:49:56 +09001555 unsigned int start = 0, end = -1;
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001556 bool force = (cpc->reason & CP_DISCARD);
1557 struct discard_entry *de = NULL;
1558 struct list_head *head = &SM_I(sbi)->dcc_info->entry_list;
Jaegeuk Kimb2955552013-11-12 14:49:56 +09001559 int i;
1560
Jaegeuk Kim3e025742016-08-02 10:56:40 -07001561 if (se->valid_blocks == max_blocks || !f2fs_discard_en(sbi))
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001562 return false;
Jaegeuk Kimb2955552013-11-12 14:49:56 +09001563
Jaegeuk Kima66cdd92015-04-30 22:37:50 -07001564 if (!force) {
1565 if (!test_opt(sbi, DISCARD) || !se->valid_blocks ||
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001566 SM_I(sbi)->dcc_info->nr_discards >=
1567 SM_I(sbi)->dcc_info->max_discards)
1568 return false;
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -07001569 }
1570
Jaegeuk Kimb2955552013-11-12 14:49:56 +09001571 /* SIT_VBLOCK_MAP_SIZE should be multiple of sizeof(unsigned long) */
1572 for (i = 0; i < entries; i++)
Jaegeuk Kima66cdd92015-04-30 22:37:50 -07001573 dmap[i] = force ? ~ckpt_map[i] & ~discard_map[i] :
Jaegeuk Kimd7bc2482014-12-12 13:53:41 -08001574 (cur_map[i] ^ ckpt_map[i]) & ckpt_map[i];
Jaegeuk Kimb2955552013-11-12 14:49:56 +09001575
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001576 while (force || SM_I(sbi)->dcc_info->nr_discards <=
1577 SM_I(sbi)->dcc_info->max_discards) {
Jaegeuk Kimb2955552013-11-12 14:49:56 +09001578 start = __find_rev_next_bit(dmap, max_blocks, end + 1);
1579 if (start >= max_blocks)
1580 break;
1581
1582 end = __find_rev_next_zero_bit(dmap, max_blocks, start + 1);
Yunlei Hec7b41e12016-07-07 12:13:33 +08001583 if (force && start && end != max_blocks
1584 && (end - start) < cpc->trim_minlen)
1585 continue;
1586
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001587 if (check_only)
1588 return true;
1589
1590 if (!de) {
1591 de = f2fs_kmem_cache_alloc(discard_entry_slab,
1592 GFP_F2FS_ZERO);
1593 de->start_blkaddr = START_BLOCK(sbi, cpc->trim_start);
1594 list_add_tail(&de->list, head);
1595 }
1596
1597 for (i = start; i < end; i++)
1598 __set_bit_le(i, (void *)de->discard_map);
1599
1600 SM_I(sbi)->dcc_info->nr_discards += end - start;
Jaegeuk Kimb2955552013-11-12 14:49:56 +09001601 }
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001602 return false;
Jaegeuk Kimb2955552013-11-12 14:49:56 +09001603}
1604
Chao Yua2cbd9b2018-04-25 17:38:29 +08001605static void release_discard_addr(struct discard_entry *entry)
1606{
1607 list_del(&entry->list);
1608 kmem_cache_free(discard_entry_slab, entry);
1609}
1610
Chao Yu6b4d6a82018-05-30 00:20:41 +08001611void f2fs_release_discard_addrs(struct f2fs_sb_info *sbi)
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -07001612{
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001613 struct list_head *head = &(SM_I(sbi)->dcc_info->entry_list);
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -07001614 struct discard_entry *entry, *this;
1615
1616 /* drop caches */
Chao Yua2cbd9b2018-04-25 17:38:29 +08001617 list_for_each_entry_safe(entry, this, head, list)
1618 release_discard_addr(entry);
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -07001619}
1620
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +09001621/*
Chao Yu6b4d6a82018-05-30 00:20:41 +08001622 * Should call f2fs_clear_prefree_segments after checkpoint is done.
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001623 */
1624static void set_prefree_as_free_segments(struct f2fs_sb_info *sbi)
1625{
1626 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
Chao Yub65ee142014-08-04 10:10:07 +08001627 unsigned int segno;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001628
1629 mutex_lock(&dirty_i->seglist_lock);
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07001630 for_each_set_bit(segno, dirty_i->dirty_segmap[PRE], MAIN_SEGS(sbi))
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001631 __set_test_and_free(sbi, segno);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001632 mutex_unlock(&dirty_i->seglist_lock);
1633}
1634
Chao Yu6b4d6a82018-05-30 00:20:41 +08001635void f2fs_clear_prefree_segments(struct f2fs_sb_info *sbi,
1636 struct cp_control *cpc)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001637{
Chao Yuefe24da2017-08-07 23:09:56 +08001638 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
1639 struct list_head *head = &dcc->entry_list;
Chao Yu2d7b8222014-03-29 11:33:17 +08001640 struct discard_entry *entry, *this;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001641 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
Changman Lee29e59c12013-11-11 09:24:37 +09001642 unsigned long *prefree_map = dirty_i->dirty_segmap[PRE];
Changman Lee29e59c12013-11-11 09:24:37 +09001643 unsigned int start = 0, end = -1;
Jaegeuk Kim36abef42016-06-03 19:29:38 -07001644 unsigned int secno, start_segno;
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001645 bool force = (cpc->reason & CP_DISCARD);
Chao Yu275b66b2016-08-29 23:58:34 +08001646
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001647 mutex_lock(&dirty_i->seglist_lock);
Changman Lee29e59c12013-11-11 09:24:37 +09001648
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001649 while (1) {
Changman Lee29e59c12013-11-11 09:24:37 +09001650 int i;
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07001651 start = find_next_bit(prefree_map, MAIN_SEGS(sbi), end + 1);
1652 if (start >= MAIN_SEGS(sbi))
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001653 break;
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07001654 end = find_next_zero_bit(prefree_map, MAIN_SEGS(sbi),
1655 start + 1);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001656
Changman Lee29e59c12013-11-11 09:24:37 +09001657 for (i = start; i < end; i++)
1658 clear_bit(i, prefree_map);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001659
Changman Lee29e59c12013-11-11 09:24:37 +09001660 dirty_i->nr_dirty[PRE] -= end - start;
1661
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001662 if (!test_opt(sbi, DISCARD))
Changman Lee29e59c12013-11-11 09:24:37 +09001663 continue;
1664
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001665 if (force && start >= cpc->trim_start &&
1666 (end - 1) <= cpc->trim_end)
1667 continue;
1668
Jaegeuk Kim36abef42016-06-03 19:29:38 -07001669 if (!test_opt(sbi, LFS) || sbi->segs_per_sec == 1) {
1670 f2fs_issue_discard(sbi, START_BLOCK(sbi, start),
Jaegeuk Kim37208872013-11-12 16:55:17 +09001671 (end - start) << sbi->log_blocks_per_seg);
Jaegeuk Kim36abef42016-06-03 19:29:38 -07001672 continue;
1673 }
1674next:
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001675 secno = GET_SEC_FROM_SEG(sbi, start);
1676 start_segno = GET_SEG_FROM_SEC(sbi, secno);
Jaegeuk Kim36abef42016-06-03 19:29:38 -07001677 if (!IS_CURSEC(sbi, secno) &&
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001678 !get_valid_blocks(sbi, start, true))
Jaegeuk Kim36abef42016-06-03 19:29:38 -07001679 f2fs_issue_discard(sbi, START_BLOCK(sbi, start_segno),
1680 sbi->segs_per_sec << sbi->log_blocks_per_seg);
1681
1682 start = start_segno + sbi->segs_per_sec;
1683 if (start < end)
1684 goto next;
Jaegeuk Kim8c53efc32017-02-27 11:57:11 -08001685 else
1686 end = start - 1;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001687 }
1688 mutex_unlock(&dirty_i->seglist_lock);
Jaegeuk Kimb2955552013-11-12 14:49:56 +09001689
1690 /* send small discards */
Chao Yu2d7b8222014-03-29 11:33:17 +08001691 list_for_each_entry_safe(entry, this, head, list) {
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001692 unsigned int cur_pos = 0, next_pos, len, total_len = 0;
1693 bool is_valid = test_bit_le(0, entry->discard_map);
1694
1695find_next:
1696 if (is_valid) {
1697 next_pos = find_next_zero_bit_le(entry->discard_map,
1698 sbi->blocks_per_seg, cur_pos);
1699 len = next_pos - cur_pos;
1700
Sheng Yong770611e2018-02-06 12:31:17 +08001701 if (f2fs_sb_has_blkzoned(sbi->sb) ||
Damien Le Moal57a91232017-05-26 17:04:40 +09001702 (force && len < cpc->trim_minlen))
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001703 goto skip;
1704
1705 f2fs_issue_discard(sbi, entry->start_blkaddr + cur_pos,
1706 len);
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001707 total_len += len;
1708 } else {
1709 next_pos = find_next_bit_le(entry->discard_map,
1710 sbi->blocks_per_seg, cur_pos);
1711 }
Jaegeuk Kim836b5a62015-04-30 22:50:06 -07001712skip:
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001713 cur_pos = next_pos;
1714 is_valid = !is_valid;
1715
1716 if (cur_pos < sbi->blocks_per_seg)
1717 goto find_next;
1718
Chao Yua2cbd9b2018-04-25 17:38:29 +08001719 release_discard_addr(entry);
Chao Yuefe24da2017-08-07 23:09:56 +08001720 dcc->nr_discards -= total_len;
Jaegeuk Kimb2955552013-11-12 14:49:56 +09001721 }
Chao Yu275b66b2016-08-29 23:58:34 +08001722
Jaegeuk Kim200ad892017-08-22 21:15:43 -07001723 wake_up_discard_thread(sbi, false);
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001724}
1725
1726static int create_discard_cmd_control(struct f2fs_sb_info *sbi)
1727{
1728 dev_t dev = sbi->sb->s_bdev->bd_dev;
1729 struct discard_cmd_control *dcc;
1730 int err = 0, i;
1731
1732 if (SM_I(sbi)->dcc_info) {
1733 dcc = SM_I(sbi)->dcc_info;
1734 goto init_thread;
1735 }
1736
Chao Yue585ca22017-11-30 19:28:17 +08001737 dcc = f2fs_kzalloc(sbi, sizeof(struct discard_cmd_control), GFP_KERNEL);
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001738 if (!dcc)
1739 return -ENOMEM;
1740
Chao Yuefe24da2017-08-07 23:09:56 +08001741 dcc->discard_granularity = DEFAULT_DISCARD_GRANULARITY;
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001742 INIT_LIST_HEAD(&dcc->entry_list);
Chao Yudaf437d2017-10-04 09:08:34 +08001743 for (i = 0; i < MAX_PLIST_NUM; i++)
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001744 INIT_LIST_HEAD(&dcc->pend_list[i]);
1745 INIT_LIST_HEAD(&dcc->wait_list);
Chao Yu28e10232017-10-04 09:08:32 +08001746 INIT_LIST_HEAD(&dcc->fstrim_list);
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001747 mutex_init(&dcc->cmd_lock);
1748 atomic_set(&dcc->issued_discard, 0);
1749 atomic_set(&dcc->issing_discard, 0);
1750 atomic_set(&dcc->discard_cmd_cnt, 0);
1751 dcc->nr_discards = 0;
1752 dcc->max_discards = MAIN_SEGS(sbi) << sbi->log_blocks_per_seg;
1753 dcc->undiscard_blks = 0;
1754 dcc->root = RB_ROOT;
1755
1756 init_waitqueue_head(&dcc->discard_wait_queue);
1757 SM_I(sbi)->dcc_info = dcc;
1758init_thread:
1759 dcc->f2fs_issue_discard = kthread_run(issue_discard_thread, sbi,
1760 "f2fs_discard-%u:%u", MAJOR(dev), MINOR(dev));
1761 if (IS_ERR(dcc->f2fs_issue_discard)) {
1762 err = PTR_ERR(dcc->f2fs_issue_discard);
1763 kfree(dcc);
1764 SM_I(sbi)->dcc_info = NULL;
1765 return err;
1766 }
1767
1768 return err;
1769}
1770
1771static void destroy_discard_cmd_control(struct f2fs_sb_info *sbi)
1772{
1773 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
1774
1775 if (!dcc)
1776 return;
1777
Chao Yu6b4d6a82018-05-30 00:20:41 +08001778 f2fs_stop_discard_thread(sbi);
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001779
1780 kfree(dcc);
1781 SM_I(sbi)->dcc_info = NULL;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001782}
1783
Chao Yu184a5cd2014-09-04 18:13:01 +08001784static bool __mark_sit_entry_dirty(struct f2fs_sb_info *sbi, unsigned int segno)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001785{
1786 struct sit_info *sit_i = SIT_I(sbi);
Chao Yu184a5cd2014-09-04 18:13:01 +08001787
1788 if (!__test_and_set_bit(segno, sit_i->dirty_sentries_bitmap)) {
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001789 sit_i->dirty_sentries++;
Chao Yu184a5cd2014-09-04 18:13:01 +08001790 return false;
1791 }
1792
1793 return true;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001794}
1795
1796static void __set_sit_entry_type(struct f2fs_sb_info *sbi, int type,
1797 unsigned int segno, int modified)
1798{
1799 struct seg_entry *se = get_seg_entry(sbi, segno);
1800 se->type = type;
1801 if (modified)
1802 __mark_sit_entry_dirty(sbi, segno);
1803}
1804
1805static void update_sit_entry(struct f2fs_sb_info *sbi, block_t blkaddr, int del)
1806{
1807 struct seg_entry *se;
1808 unsigned int segno, offset;
1809 long int new_vblocks;
Yunlong Song5ccdd092017-08-02 21:20:13 +08001810 bool exist;
1811#ifdef CONFIG_F2FS_CHECK_FS
1812 bool mir_exist;
1813#endif
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001814
1815 segno = GET_SEGNO(sbi, blkaddr);
1816
1817 se = get_seg_entry(sbi, segno);
1818 new_vblocks = se->valid_blocks + del;
Jaegeuk Kim491c0852014-02-04 13:01:10 +09001819 offset = GET_BLKOFF_FROM_SEG0(sbi, blkaddr);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001820
Jaegeuk Kim9850cf42014-09-02 15:52:58 -07001821 f2fs_bug_on(sbi, (new_vblocks >> (sizeof(unsigned short) << 3) ||
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001822 (new_vblocks > sbi->blocks_per_seg)));
1823
1824 se->valid_blocks = new_vblocks;
Chao Yuaccb4062018-06-04 23:20:17 +08001825 se->mtime = get_mtime(sbi, false);
1826 if (se->mtime > SIT_I(sbi)->max_mtime)
1827 SIT_I(sbi)->max_mtime = se->mtime;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001828
1829 /* Update valid block bitmap */
1830 if (del > 0) {
Yunlong Song5ccdd092017-08-02 21:20:13 +08001831 exist = f2fs_test_and_set_bit(offset, se->cur_valid_map);
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001832#ifdef CONFIG_F2FS_CHECK_FS
Yunlong Song5ccdd092017-08-02 21:20:13 +08001833 mir_exist = f2fs_test_and_set_bit(offset,
1834 se->cur_valid_map_mir);
1835 if (unlikely(exist != mir_exist)) {
1836 f2fs_msg(sbi->sb, KERN_ERR, "Inconsistent error "
1837 "when setting bitmap, blk:%u, old bit:%d",
1838 blkaddr, exist);
Jaegeuk Kim05796762014-09-02 16:05:00 -07001839 f2fs_bug_on(sbi, 1);
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001840 }
Yunlong Song5ccdd092017-08-02 21:20:13 +08001841#endif
1842 if (unlikely(exist)) {
1843 f2fs_msg(sbi->sb, KERN_ERR,
1844 "Bitmap was wrongly set, blk:%u", blkaddr);
1845 f2fs_bug_on(sbi, 1);
Yunlong Song5fd827b2017-08-02 22:16:54 +08001846 se->valid_blocks--;
1847 del = 0;
Yunlong Song5ccdd092017-08-02 21:20:13 +08001848 }
1849
Jaegeuk Kim3e025742016-08-02 10:56:40 -07001850 if (f2fs_discard_en(sbi) &&
1851 !f2fs_test_and_set_bit(offset, se->discard_map))
Jaegeuk Kima66cdd92015-04-30 22:37:50 -07001852 sbi->discard_blks--;
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001853
1854 /* don't overwrite by SSR to keep node chain */
Yunlei Heb6d2ec82018-03-07 16:22:50 +08001855 if (IS_NODESEG(se->type)) {
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001856 if (!f2fs_test_and_set_bit(offset, se->ckpt_valid_map))
1857 se->ckpt_valid_blocks++;
1858 }
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001859 } else {
Yunlong Song5ccdd092017-08-02 21:20:13 +08001860 exist = f2fs_test_and_clear_bit(offset, se->cur_valid_map);
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001861#ifdef CONFIG_F2FS_CHECK_FS
Yunlong Song5ccdd092017-08-02 21:20:13 +08001862 mir_exist = f2fs_test_and_clear_bit(offset,
1863 se->cur_valid_map_mir);
1864 if (unlikely(exist != mir_exist)) {
1865 f2fs_msg(sbi->sb, KERN_ERR, "Inconsistent error "
1866 "when clearing bitmap, blk:%u, old bit:%d",
1867 blkaddr, exist);
Jaegeuk Kim05796762014-09-02 16:05:00 -07001868 f2fs_bug_on(sbi, 1);
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07001869 }
Yunlong Song5ccdd092017-08-02 21:20:13 +08001870#endif
1871 if (unlikely(!exist)) {
1872 f2fs_msg(sbi->sb, KERN_ERR,
1873 "Bitmap was wrongly cleared, blk:%u", blkaddr);
1874 f2fs_bug_on(sbi, 1);
Yunlong Song5fd827b2017-08-02 22:16:54 +08001875 se->valid_blocks++;
1876 del = 0;
Yunlong Song5ccdd092017-08-02 21:20:13 +08001877 }
1878
Jaegeuk Kim3e025742016-08-02 10:56:40 -07001879 if (f2fs_discard_en(sbi) &&
1880 f2fs_test_and_clear_bit(offset, se->discard_map))
Jaegeuk Kima66cdd92015-04-30 22:37:50 -07001881 sbi->discard_blks++;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001882 }
1883 if (!f2fs_test_bit(offset, se->ckpt_valid_map))
1884 se->ckpt_valid_blocks += del;
1885
1886 __mark_sit_entry_dirty(sbi, segno);
1887
1888 /* update total number of valid blocks to be written in ckpt area */
1889 SIT_I(sbi)->written_valid_blocks += del;
1890
1891 if (sbi->segs_per_sec > 1)
1892 get_sec_entry(sbi, segno)->valid_blocks += del;
1893}
1894
Chao Yu6b4d6a82018-05-30 00:20:41 +08001895void f2fs_invalidate_blocks(struct f2fs_sb_info *sbi, block_t addr)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001896{
1897 unsigned int segno = GET_SEGNO(sbi, addr);
1898 struct sit_info *sit_i = SIT_I(sbi);
1899
Jaegeuk Kim9850cf42014-09-02 15:52:58 -07001900 f2fs_bug_on(sbi, addr == NULL_ADDR);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001901 if (addr == NEW_ADDR)
1902 return;
1903
1904 /* add it into sit main buffer */
Chao Yu25d0bec2017-10-30 17:49:53 +08001905 down_write(&sit_i->sentry_lock);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001906
1907 update_sit_entry(sbi, addr, -1);
1908
1909 /* add it into dirty seglist */
1910 locate_dirty_segment(sbi, segno);
1911
Chao Yu25d0bec2017-10-30 17:49:53 +08001912 up_write(&sit_i->sentry_lock);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001913}
1914
Chao Yu6b4d6a82018-05-30 00:20:41 +08001915bool f2fs_is_checkpointed_data(struct f2fs_sb_info *sbi, block_t blkaddr)
Jaegeuk Kim6e2c64a2015-10-07 12:28:41 -07001916{
1917 struct sit_info *sit_i = SIT_I(sbi);
1918 unsigned int segno, offset;
1919 struct seg_entry *se;
1920 bool is_cp = false;
1921
Chao Yu158d9bb2018-05-23 22:25:08 +08001922 if (!is_valid_blkaddr(blkaddr))
Jaegeuk Kim6e2c64a2015-10-07 12:28:41 -07001923 return true;
1924
Chao Yu25d0bec2017-10-30 17:49:53 +08001925 down_read(&sit_i->sentry_lock);
Jaegeuk Kim6e2c64a2015-10-07 12:28:41 -07001926
1927 segno = GET_SEGNO(sbi, blkaddr);
1928 se = get_seg_entry(sbi, segno);
1929 offset = GET_BLKOFF_FROM_SEG0(sbi, blkaddr);
1930
1931 if (f2fs_test_bit(offset, se->ckpt_valid_map))
1932 is_cp = true;
1933
Chao Yu25d0bec2017-10-30 17:49:53 +08001934 up_read(&sit_i->sentry_lock);
Jaegeuk Kim6e2c64a2015-10-07 12:28:41 -07001935
1936 return is_cp;
1937}
1938
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +09001939/*
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001940 * This function should be resided under the curseg_mutex lock
1941 */
1942static void __add_sum_entry(struct f2fs_sb_info *sbi, int type,
Haicheng Lie79efe32013-06-13 16:59:27 +08001943 struct f2fs_summary *sum)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001944{
1945 struct curseg_info *curseg = CURSEG_I(sbi, type);
1946 void *addr = curseg->sum_blk;
Haicheng Lie79efe32013-06-13 16:59:27 +08001947 addr += curseg->next_blkoff * sizeof(struct f2fs_summary);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001948 memcpy(addr, sum, sizeof(struct f2fs_summary));
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001949}
1950
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +09001951/*
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001952 * Calculate the number of current summary pages for writing
1953 */
Chao Yu6b4d6a82018-05-30 00:20:41 +08001954int f2fs_npages_for_summary_flush(struct f2fs_sb_info *sbi, bool for_ra)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001955{
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001956 int valid_sum_count = 0;
Fan Li9a479382013-10-29 16:21:47 +08001957 int i, sum_in_page;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001958
1959 for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) {
1960 if (sbi->ckpt->alloc_type[i] == SSR)
1961 valid_sum_count += sbi->blocks_per_seg;
Chao Yu3fa06d72014-12-09 14:21:46 +08001962 else {
1963 if (for_ra)
1964 valid_sum_count += le16_to_cpu(
1965 F2FS_CKPT(sbi)->cur_data_blkoff[i]);
1966 else
1967 valid_sum_count += curseg_blkoff(sbi, i);
1968 }
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001969 }
1970
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +03001971 sum_in_page = (PAGE_SIZE - 2 * SUM_JOURNAL_SIZE -
Fan Li9a479382013-10-29 16:21:47 +08001972 SUM_FOOTER_SIZE) / SUMMARY_SIZE;
1973 if (valid_sum_count <= sum_in_page)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001974 return 1;
Fan Li9a479382013-10-29 16:21:47 +08001975 else if ((valid_sum_count - sum_in_page) <=
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +03001976 (PAGE_SIZE - SUM_FOOTER_SIZE) / SUMMARY_SIZE)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001977 return 2;
1978 return 3;
1979}
1980
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +09001981/*
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001982 * Caller should put this summary page
1983 */
Chao Yu6b4d6a82018-05-30 00:20:41 +08001984struct page *f2fs_get_sum_page(struct f2fs_sb_info *sbi, unsigned int segno)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001985{
Chao Yu6b4d6a82018-05-30 00:20:41 +08001986 return f2fs_get_meta_page(sbi, GET_SUM_BLOCK(sbi, segno));
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001987}
1988
Chao Yu6b4d6a82018-05-30 00:20:41 +08001989void f2fs_update_meta_page(struct f2fs_sb_info *sbi,
1990 void *src, block_t blk_addr)
Chao Yu381722d2015-05-19 17:40:04 +08001991{
Chao Yu6b4d6a82018-05-30 00:20:41 +08001992 struct page *page = f2fs_grab_meta_page(sbi, blk_addr);
Chao Yu381722d2015-05-19 17:40:04 +08001993
Chao Yu148c5182017-11-02 20:41:02 +08001994 memcpy(page_address(page), src, PAGE_SIZE);
Chao Yu381722d2015-05-19 17:40:04 +08001995 set_page_dirty(page);
1996 f2fs_put_page(page, 1);
1997}
1998
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001999static void write_sum_page(struct f2fs_sb_info *sbi,
2000 struct f2fs_summary_block *sum_blk, block_t blk_addr)
2001{
Chao Yu6b4d6a82018-05-30 00:20:41 +08002002 f2fs_update_meta_page(sbi, (void *)sum_blk, blk_addr);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002003}
2004
Chao Yub7ad7512016-02-19 18:08:46 +08002005static void write_current_sum_page(struct f2fs_sb_info *sbi,
2006 int type, block_t blk_addr)
2007{
2008 struct curseg_info *curseg = CURSEG_I(sbi, type);
Chao Yu6b4d6a82018-05-30 00:20:41 +08002009 struct page *page = f2fs_grab_meta_page(sbi, blk_addr);
Chao Yub7ad7512016-02-19 18:08:46 +08002010 struct f2fs_summary_block *src = curseg->sum_blk;
2011 struct f2fs_summary_block *dst;
2012
2013 dst = (struct f2fs_summary_block *)page_address(page);
Chao Yu7aee0582018-04-09 20:25:06 +08002014 memset(dst, 0, PAGE_SIZE);
Chao Yub7ad7512016-02-19 18:08:46 +08002015
2016 mutex_lock(&curseg->curseg_mutex);
2017
2018 down_read(&curseg->journal_rwsem);
2019 memcpy(&dst->journal, curseg->journal, SUM_JOURNAL_SIZE);
2020 up_read(&curseg->journal_rwsem);
2021
2022 memcpy(dst->entries, src->entries, SUM_ENTRY_SIZE);
2023 memcpy(&dst->footer, &src->footer, SUM_FOOTER_SIZE);
2024
2025 mutex_unlock(&curseg->curseg_mutex);
2026
2027 set_page_dirty(page);
2028 f2fs_put_page(page, 1);
2029}
2030
Jaegeuk Kim60374682013-03-31 13:58:51 +09002031static int is_next_segment_free(struct f2fs_sb_info *sbi, int type)
2032{
2033 struct curseg_info *curseg = CURSEG_I(sbi, type);
Haicheng Li81fb5e82013-05-14 18:20:28 +08002034 unsigned int segno = curseg->segno + 1;
Jaegeuk Kim60374682013-03-31 13:58:51 +09002035 struct free_segmap_info *free_i = FREE_I(sbi);
2036
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07002037 if (segno < MAIN_SEGS(sbi) && segno % sbi->segs_per_sec)
Haicheng Li81fb5e82013-05-14 18:20:28 +08002038 return !test_bit(segno, free_i->free_segmap);
Jaegeuk Kim60374682013-03-31 13:58:51 +09002039 return 0;
2040}
2041
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +09002042/*
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002043 * Find a new segment from the free segments bitmap to right order
2044 * This function should be returned with success, otherwise BUG
2045 */
2046static void get_new_segment(struct f2fs_sb_info *sbi,
2047 unsigned int *newseg, bool new_sec, int dir)
2048{
2049 struct free_segmap_info *free_i = FREE_I(sbi);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002050 unsigned int segno, secno, zoneno;
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07002051 unsigned int total_zones = MAIN_SECS(sbi) / sbi->secs_per_zone;
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07002052 unsigned int hint = GET_SEC_FROM_SEG(sbi, *newseg);
2053 unsigned int old_zoneno = GET_ZONE_FROM_SEG(sbi, *newseg);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002054 unsigned int left_start = hint;
2055 bool init = true;
2056 int go_left = 0;
2057 int i;
2058
Chao Yu1a118cc2015-02-11 18:20:38 +08002059 spin_lock(&free_i->segmap_lock);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002060
2061 if (!new_sec && ((*newseg + 1) % sbi->segs_per_sec)) {
2062 segno = find_next_zero_bit(free_i->free_segmap,
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07002063 GET_SEG_FROM_SEC(sbi, hint + 1), *newseg + 1);
2064 if (segno < GET_SEG_FROM_SEC(sbi, hint + 1))
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002065 goto got_it;
2066 }
2067find_other_zone:
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07002068 secno = find_next_zero_bit(free_i->free_secmap, MAIN_SECS(sbi), hint);
2069 if (secno >= MAIN_SECS(sbi)) {
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002070 if (dir == ALLOC_RIGHT) {
2071 secno = find_next_zero_bit(free_i->free_secmap,
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07002072 MAIN_SECS(sbi), 0);
2073 f2fs_bug_on(sbi, secno >= MAIN_SECS(sbi));
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002074 } else {
2075 go_left = 1;
2076 left_start = hint - 1;
2077 }
2078 }
2079 if (go_left == 0)
2080 goto skip_left;
2081
2082 while (test_bit(left_start, free_i->free_secmap)) {
2083 if (left_start > 0) {
2084 left_start--;
2085 continue;
2086 }
2087 left_start = find_next_zero_bit(free_i->free_secmap,
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07002088 MAIN_SECS(sbi), 0);
2089 f2fs_bug_on(sbi, left_start >= MAIN_SECS(sbi));
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002090 break;
2091 }
2092 secno = left_start;
2093skip_left:
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07002094 segno = GET_SEG_FROM_SEC(sbi, secno);
2095 zoneno = GET_ZONE_FROM_SEC(sbi, secno);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002096
2097 /* give up on finding another zone */
2098 if (!init)
2099 goto got_it;
2100 if (sbi->secs_per_zone == 1)
2101 goto got_it;
2102 if (zoneno == old_zoneno)
2103 goto got_it;
2104 if (dir == ALLOC_LEFT) {
2105 if (!go_left && zoneno + 1 >= total_zones)
2106 goto got_it;
2107 if (go_left && zoneno == 0)
2108 goto got_it;
2109 }
2110 for (i = 0; i < NR_CURSEG_TYPE; i++)
2111 if (CURSEG_I(sbi, i)->zone == zoneno)
2112 break;
2113
2114 if (i < NR_CURSEG_TYPE) {
2115 /* zone is in user, try another */
2116 if (go_left)
2117 hint = zoneno * sbi->secs_per_zone - 1;
2118 else if (zoneno + 1 >= total_zones)
2119 hint = 0;
2120 else
2121 hint = (zoneno + 1) * sbi->secs_per_zone;
2122 init = false;
2123 goto find_other_zone;
2124 }
2125got_it:
2126 /* set it as dirty segment in free segmap */
Jaegeuk Kim9850cf42014-09-02 15:52:58 -07002127 f2fs_bug_on(sbi, test_bit(segno, free_i->free_segmap));
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002128 __set_inuse(sbi, segno);
2129 *newseg = segno;
Chao Yu1a118cc2015-02-11 18:20:38 +08002130 spin_unlock(&free_i->segmap_lock);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002131}
2132
2133static void reset_curseg(struct f2fs_sb_info *sbi, int type, int modified)
2134{
2135 struct curseg_info *curseg = CURSEG_I(sbi, type);
2136 struct summary_footer *sum_footer;
2137
2138 curseg->segno = curseg->next_segno;
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07002139 curseg->zone = GET_ZONE_FROM_SEG(sbi, curseg->segno);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002140 curseg->next_blkoff = 0;
2141 curseg->next_segno = NULL_SEGNO;
2142
2143 sum_footer = &(curseg->sum_blk->footer);
2144 memset(sum_footer, 0, sizeof(struct summary_footer));
2145 if (IS_DATASEG(type))
2146 SET_SUM_TYPE(sum_footer, SUM_TYPE_DATA);
2147 if (IS_NODESEG(type))
2148 SET_SUM_TYPE(sum_footer, SUM_TYPE_NODE);
2149 __set_sit_entry_type(sbi, type, curseg->segno, modified);
2150}
2151
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07002152static unsigned int __get_next_segno(struct f2fs_sb_info *sbi, int type)
2153{
2154 /* if segs_per_sec is large than 1, we need to keep original policy. */
2155 if (sbi->segs_per_sec != 1)
2156 return CURSEG_I(sbi, type)->segno;
2157
Yunlong Songaae506a2018-01-29 11:37:45 +08002158 if (test_opt(sbi, NOHEAP) &&
2159 (type == CURSEG_HOT_DATA || IS_NODESEG(type)))
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07002160 return 0;
2161
2162 if (SIT_I(sbi)->last_victim[ALLOC_NEXT])
2163 return SIT_I(sbi)->last_victim[ALLOC_NEXT];
Jaegeuk Kim78c1fc22018-02-18 08:50:49 -08002164
2165 /* find segments from 0 to reuse freed segments */
Chao Yue9a50e62018-03-08 14:22:56 +08002166 if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_REUSE)
Jaegeuk Kim78c1fc22018-02-18 08:50:49 -08002167 return 0;
2168
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07002169 return CURSEG_I(sbi, type)->segno;
2170}
2171
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +09002172/*
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002173 * Allocate a current working segment.
2174 * This function always allocates a free segment in LFS manner.
2175 */
2176static void new_curseg(struct f2fs_sb_info *sbi, int type, bool new_sec)
2177{
2178 struct curseg_info *curseg = CURSEG_I(sbi, type);
2179 unsigned int segno = curseg->segno;
2180 int dir = ALLOC_LEFT;
2181
2182 write_sum_page(sbi, curseg->sum_blk,
Haicheng Li81fb5e82013-05-14 18:20:28 +08002183 GET_SUM_BLOCK(sbi, segno));
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002184 if (type == CURSEG_WARM_DATA || type == CURSEG_COLD_DATA)
2185 dir = ALLOC_RIGHT;
2186
2187 if (test_opt(sbi, NOHEAP))
2188 dir = ALLOC_RIGHT;
2189
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07002190 segno = __get_next_segno(sbi, type);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002191 get_new_segment(sbi, &segno, new_sec, dir);
2192 curseg->next_segno = segno;
2193 reset_curseg(sbi, type, 1);
2194 curseg->alloc_type = LFS;
2195}
2196
2197static void __next_free_blkoff(struct f2fs_sb_info *sbi,
2198 struct curseg_info *seg, block_t start)
2199{
2200 struct seg_entry *se = get_seg_entry(sbi, seg->segno);
Changman Leee81c93c2013-11-15 13:21:16 +09002201 int entries = SIT_VBLOCK_MAP_SIZE / sizeof(unsigned long);
Jaegeuk Kim60a3b782015-02-10 16:44:29 -08002202 unsigned long *target_map = SIT_I(sbi)->tmp_map;
Changman Leee81c93c2013-11-15 13:21:16 +09002203 unsigned long *ckpt_map = (unsigned long *)se->ckpt_valid_map;
2204 unsigned long *cur_map = (unsigned long *)se->cur_valid_map;
2205 int i, pos;
2206
2207 for (i = 0; i < entries; i++)
2208 target_map[i] = ckpt_map[i] | cur_map[i];
2209
2210 pos = __find_rev_next_zero_bit(target_map, sbi->blocks_per_seg, start);
2211
2212 seg->next_blkoff = pos;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002213}
2214
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +09002215/*
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002216 * If a segment is written by LFS manner, next block offset is just obtained
2217 * by increasing the current block offset. However, if a segment is written by
2218 * SSR manner, next block offset obtained by calling __next_free_blkoff
2219 */
2220static void __refresh_next_blkoff(struct f2fs_sb_info *sbi,
2221 struct curseg_info *seg)
2222{
2223 if (seg->alloc_type == SSR)
2224 __next_free_blkoff(sbi, seg, seg->next_blkoff + 1);
2225 else
2226 seg->next_blkoff++;
2227}
2228
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +09002229/*
arter97e1c42042014-08-06 23:22:50 +09002230 * This function always allocates a used segment(from dirty seglist) by SSR
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002231 * manner, so it should recover the existing segment information of valid blocks
2232 */
Chao Yua69c9742017-08-30 18:04:48 +08002233static void change_curseg(struct f2fs_sb_info *sbi, int type)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002234{
2235 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
2236 struct curseg_info *curseg = CURSEG_I(sbi, type);
2237 unsigned int new_segno = curseg->next_segno;
2238 struct f2fs_summary_block *sum_node;
2239 struct page *sum_page;
2240
2241 write_sum_page(sbi, curseg->sum_blk,
2242 GET_SUM_BLOCK(sbi, curseg->segno));
2243 __set_test_and_inuse(sbi, new_segno);
2244
2245 mutex_lock(&dirty_i->seglist_lock);
2246 __remove_dirty_segment(sbi, new_segno, PRE);
2247 __remove_dirty_segment(sbi, new_segno, DIRTY);
2248 mutex_unlock(&dirty_i->seglist_lock);
2249
2250 reset_curseg(sbi, type, 1);
2251 curseg->alloc_type = SSR;
2252 __next_free_blkoff(sbi, curseg, 0);
2253
Chao Yu6b4d6a82018-05-30 00:20:41 +08002254 sum_page = f2fs_get_sum_page(sbi, new_segno);
Chao Yua69c9742017-08-30 18:04:48 +08002255 sum_node = (struct f2fs_summary_block *)page_address(sum_page);
2256 memcpy(curseg->sum_blk, sum_node, SUM_ENTRY_SIZE);
2257 f2fs_put_page(sum_page, 1);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002258}
2259
Jaegeuk Kim43727522013-02-04 15:11:17 +09002260static int get_ssr_segment(struct f2fs_sb_info *sbi, int type)
2261{
2262 struct curseg_info *curseg = CURSEG_I(sbi, type);
2263 const struct victim_selection *v_ops = DIRTY_I(sbi)->v_ops;
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07002264 unsigned segno = NULL_SEGNO;
2265 int i, cnt;
2266 bool reversed = false;
Jaegeuk Kim43727522013-02-04 15:11:17 +09002267
Chao Yu6b4d6a82018-05-30 00:20:41 +08002268 /* f2fs_need_SSR() already forces to do this */
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07002269 if (v_ops->get_victim(sbi, &segno, BG_GC, type, SSR)) {
2270 curseg->next_segno = segno;
2271 return 1;
2272 }
Jaegeuk Kim43727522013-02-04 15:11:17 +09002273
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07002274 /* For node segments, let's do SSR more intensively */
2275 if (IS_NODESEG(type)) {
2276 if (type >= CURSEG_WARM_NODE) {
2277 reversed = true;
2278 i = CURSEG_COLD_NODE;
2279 } else {
2280 i = CURSEG_HOT_NODE;
2281 }
2282 cnt = NR_CURSEG_NODE_TYPE;
2283 } else {
2284 if (type >= CURSEG_WARM_DATA) {
2285 reversed = true;
2286 i = CURSEG_COLD_DATA;
2287 } else {
2288 i = CURSEG_HOT_DATA;
2289 }
2290 cnt = NR_CURSEG_DATA_TYPE;
2291 }
2292
2293 for (; cnt-- > 0; reversed ? i-- : i++) {
2294 if (i == type)
2295 continue;
2296 if (v_ops->get_victim(sbi, &segno, BG_GC, i, SSR)) {
2297 curseg->next_segno = segno;
Jaegeuk Kim43727522013-02-04 15:11:17 +09002298 return 1;
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07002299 }
2300 }
Jaegeuk Kim43727522013-02-04 15:11:17 +09002301 return 0;
2302}
2303
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002304/*
2305 * flush out current segment and replace it with new segment
2306 * This function should be returned with success, otherwise BUG
2307 */
2308static void allocate_segment_by_default(struct f2fs_sb_info *sbi,
2309 int type, bool force)
2310{
2311 struct curseg_info *curseg = CURSEG_I(sbi, type);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002312
Gu Zheng7b405272013-08-19 09:41:15 +08002313 if (force)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002314 new_curseg(sbi, type, true);
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07002315 else if (!is_set_ckpt_flags(sbi, CP_CRC_RECOVERY_FLAG) &&
2316 type == CURSEG_WARM_NODE)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002317 new_curseg(sbi, type, false);
Jaegeuk Kim60374682013-03-31 13:58:51 +09002318 else if (curseg->alloc_type == LFS && is_next_segment_free(sbi, type))
2319 new_curseg(sbi, type, false);
Chao Yu6b4d6a82018-05-30 00:20:41 +08002320 else if (f2fs_need_SSR(sbi) && get_ssr_segment(sbi, type))
Chao Yua69c9742017-08-30 18:04:48 +08002321 change_curseg(sbi, type);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002322 else
2323 new_curseg(sbi, type, false);
Jaegeuk Kimdcdfff62013-10-22 20:56:10 +09002324
2325 stat_inc_seg_type(sbi, curseg);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002326}
2327
Chao Yu6b4d6a82018-05-30 00:20:41 +08002328void f2fs_allocate_new_segments(struct f2fs_sb_info *sbi)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002329{
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07002330 struct curseg_info *curseg;
2331 unsigned int old_segno;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002332 int i;
2333
Chao Yu25d0bec2017-10-30 17:49:53 +08002334 down_write(&SIT_I(sbi)->sentry_lock);
2335
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07002336 for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) {
2337 curseg = CURSEG_I(sbi, i);
2338 old_segno = curseg->segno;
2339 SIT_I(sbi)->s_ops->allocate_segment(sbi, i, true);
2340 locate_dirty_segment(sbi, old_segno);
2341 }
Chao Yu25d0bec2017-10-30 17:49:53 +08002342
2343 up_write(&SIT_I(sbi)->sentry_lock);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002344}
2345
2346static const struct segment_allocation default_salloc_ops = {
2347 .allocate_segment = allocate_segment_by_default,
2348};
2349
Chao Yu6b4d6a82018-05-30 00:20:41 +08002350bool f2fs_exist_trim_candidates(struct f2fs_sb_info *sbi,
2351 struct cp_control *cpc)
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07002352{
2353 __u64 trim_start = cpc->trim_start;
2354 bool has_candidate = false;
2355
Chao Yu25d0bec2017-10-30 17:49:53 +08002356 down_write(&SIT_I(sbi)->sentry_lock);
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07002357 for (; cpc->trim_start <= cpc->trim_end; cpc->trim_start++) {
2358 if (add_discard_addrs(sbi, cpc, true)) {
2359 has_candidate = true;
2360 break;
2361 }
2362 }
Chao Yu25d0bec2017-10-30 17:49:53 +08002363 up_write(&SIT_I(sbi)->sentry_lock);
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07002364
2365 cpc->trim_start = trim_start;
2366 return has_candidate;
2367}
2368
Jaegeuk Kim8f6a2e72018-05-24 13:57:26 -07002369static void __issue_discard_cmd_range(struct f2fs_sb_info *sbi,
2370 struct discard_policy *dpolicy,
2371 unsigned int start, unsigned int end)
2372{
2373 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
2374 struct discard_cmd *prev_dc = NULL, *next_dc = NULL;
2375 struct rb_node **insert_p = NULL, *insert_parent = NULL;
2376 struct discard_cmd *dc;
2377 struct blk_plug plug;
2378 int issued;
2379
2380next:
2381 issued = 0;
2382
2383 mutex_lock(&dcc->cmd_lock);
Chao Yu6b4d6a82018-05-30 00:20:41 +08002384 f2fs_bug_on(sbi, !f2fs_check_rb_tree_consistence(sbi, &dcc->root));
Jaegeuk Kim8f6a2e72018-05-24 13:57:26 -07002385
Chao Yu6b4d6a82018-05-30 00:20:41 +08002386 dc = (struct discard_cmd *)f2fs_lookup_rb_tree_ret(&dcc->root,
Jaegeuk Kim8f6a2e72018-05-24 13:57:26 -07002387 NULL, start,
2388 (struct rb_entry **)&prev_dc,
2389 (struct rb_entry **)&next_dc,
2390 &insert_p, &insert_parent, true);
2391 if (!dc)
2392 dc = next_dc;
2393
2394 blk_start_plug(&plug);
2395
2396 while (dc && dc->lstart <= end) {
2397 struct rb_node *node;
2398
2399 if (dc->len < dpolicy->granularity)
2400 goto skip;
2401
2402 if (dc->state != D_PREP) {
2403 list_move_tail(&dc->list, &dcc->fstrim_list);
2404 goto skip;
2405 }
2406
2407 __submit_discard_cmd(sbi, dpolicy, dc);
2408
2409 if (++issued >= dpolicy->max_requests) {
2410 start = dc->lstart + dc->len;
2411
2412 blk_finish_plug(&plug);
2413 mutex_unlock(&dcc->cmd_lock);
2414 __wait_all_discard_cmd(sbi, NULL);
2415 congestion_wait(BLK_RW_ASYNC, HZ/50);
2416 goto next;
2417 }
2418skip:
2419 node = rb_next(&dc->rb_node);
2420 dc = rb_entry_safe(node, struct discard_cmd, rb_node);
2421
2422 if (fatal_signal_pending(current))
2423 break;
2424 }
2425
2426 blk_finish_plug(&plug);
2427 mutex_unlock(&dcc->cmd_lock);
2428}
2429
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -07002430int f2fs_trim_fs(struct f2fs_sb_info *sbi, struct fstrim_range *range)
2431{
Jaegeuk Kimf7ef9b82015-02-09 12:02:44 -08002432 __u64 start = F2FS_BYTES_TO_BLK(range->start);
2433 __u64 end = start + F2FS_BYTES_TO_BLK(range->len) - 1;
Chao Yu0357a0f2018-04-09 10:25:23 +08002434 unsigned int start_segno, end_segno;
Chao Yu28e10232017-10-04 09:08:32 +08002435 block_t start_block, end_block;
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -07002436 struct cp_control cpc;
Chao Yudaf437d2017-10-04 09:08:34 +08002437 struct discard_policy dpolicy;
Chao Yuab302042017-10-28 16:52:32 +08002438 unsigned long long trimmed = 0;
Chao Yuc34f42e2015-12-23 17:50:30 +08002439 int err = 0;
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -07002440
Jaegeuk Kim836b5a62015-04-30 22:50:06 -07002441 if (start >= MAX_BLKADDR(sbi) || range->len < sbi->blocksize)
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -07002442 return -EINVAL;
2443
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07002444 if (end <= MAIN_BLKADDR(sbi))
Chao Yuaa8b4b92018-04-08 20:39:03 +08002445 return -EINVAL;
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -07002446
Yunlei Heed214a12016-09-01 10:14:39 +08002447 if (is_sbi_flag_set(sbi, SBI_NEED_FSCK)) {
2448 f2fs_msg(sbi->sb, KERN_WARNING,
2449 "Found FS corruption, run fsck to fix.");
Chao Yuaa8b4b92018-04-08 20:39:03 +08002450 return -EIO;
Yunlei Heed214a12016-09-01 10:14:39 +08002451 }
2452
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -07002453 /* start/end segment number in main_area */
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07002454 start_segno = (start <= MAIN_BLKADDR(sbi)) ? 0 : GET_SEGNO(sbi, start);
2455 end_segno = (end >= MAX_BLKADDR(sbi)) ? MAIN_SEGS(sbi) - 1 :
2456 GET_SEGNO(sbi, end);
Chao Yu28e10232017-10-04 09:08:32 +08002457
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -07002458 cpc.reason = CP_DISCARD;
Jaegeuk Kim836b5a62015-04-30 22:50:06 -07002459 cpc.trim_minlen = max_t(__u64, 1, F2FS_BYTES_TO_BLK(range->minlen));
Chao Yu0357a0f2018-04-09 10:25:23 +08002460 cpc.trim_start = start_segno;
2461 cpc.trim_end = end_segno;
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -07002462
Chao Yu0357a0f2018-04-09 10:25:23 +08002463 if (sbi->discard_blks == 0)
2464 goto out;
Jaegeuk Kima66cdd92015-04-30 22:37:50 -07002465
Chao Yu0357a0f2018-04-09 10:25:23 +08002466 mutex_lock(&sbi->gc_mutex);
Chao Yu6b4d6a82018-05-30 00:20:41 +08002467 err = f2fs_write_checkpoint(sbi, &cpc);
Chao Yu0357a0f2018-04-09 10:25:23 +08002468 mutex_unlock(&sbi->gc_mutex);
2469 if (err)
2470 goto out;
Chao Yu28e10232017-10-04 09:08:32 +08002471
2472 start_block = START_BLOCK(sbi, start_segno);
Chao Yu0357a0f2018-04-09 10:25:23 +08002473 end_block = START_BLOCK(sbi, end_segno + 1);
Chao Yu28e10232017-10-04 09:08:32 +08002474
Jaegeuk Kim41059092018-05-29 09:58:42 -07002475 __init_discard_policy(sbi, &dpolicy, DPOLICY_FSTRIM, cpc.trim_minlen);
Chao Yudaf437d2017-10-04 09:08:34 +08002476 __issue_discard_cmd_range(sbi, &dpolicy, start_block, end_block);
Jaegeuk Kim3ccf9ee2018-05-31 10:20:48 -07002477
2478 /*
2479 * We filed discard candidates, but actually we don't need to wait for
2480 * all of them, since they'll be issued in idle time along with runtime
2481 * discard option. User configuration looks like using runtime discard
2482 * or periodic fstrim instead of it.
2483 */
2484 if (!test_opt(sbi, DISCARD)) {
2485 trimmed = __wait_discard_cmd_range(sbi, &dpolicy,
Chao Yuab302042017-10-28 16:52:32 +08002486 start_block, end_block);
Jaegeuk Kim3ccf9ee2018-05-31 10:20:48 -07002487 range->len = F2FS_BLK_TO_BYTES(trimmed);
2488 }
Chao Yu0357a0f2018-04-09 10:25:23 +08002489out:
Chao Yuc34f42e2015-12-23 17:50:30 +08002490 return err;
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -07002491}
2492
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002493static bool __has_curseg_space(struct f2fs_sb_info *sbi, int type)
2494{
2495 struct curseg_info *curseg = CURSEG_I(sbi, type);
2496 if (curseg->next_blkoff < sbi->blocks_per_seg)
2497 return true;
2498 return false;
2499}
2500
Chao Yu6b4d6a82018-05-30 00:20:41 +08002501int f2fs_rw_hint_to_seg_type(enum rw_hint hint)
Hyunchul Leeb1823df2017-11-09 14:51:27 +09002502{
2503 switch (hint) {
2504 case WRITE_LIFE_SHORT:
2505 return CURSEG_HOT_DATA;
2506 case WRITE_LIFE_EXTREME:
2507 return CURSEG_COLD_DATA;
2508 default:
2509 return CURSEG_WARM_DATA;
2510 }
2511}
Hyunchul Leeb1823df2017-11-09 14:51:27 +09002512
Hyunchul Leebcdc5712018-01-31 11:36:57 +09002513/* This returns write hints for each segment type. This hints will be
2514 * passed down to block layer. There are mapping tables which depend on
2515 * the mount option 'whint_mode'.
2516 *
2517 * 1) whint_mode=off. F2FS only passes down WRITE_LIFE_NOT_SET.
2518 *
2519 * 2) whint_mode=user-based. F2FS tries to pass down hints given by users.
2520 *
2521 * User F2FS Block
2522 * ---- ---- -----
2523 * META WRITE_LIFE_NOT_SET
2524 * HOT_NODE "
2525 * WARM_NODE "
2526 * COLD_NODE "
2527 * ioctl(COLD) COLD_DATA WRITE_LIFE_EXTREME
2528 * extension list " "
2529 *
2530 * -- buffered io
2531 * WRITE_LIFE_EXTREME COLD_DATA WRITE_LIFE_EXTREME
2532 * WRITE_LIFE_SHORT HOT_DATA WRITE_LIFE_SHORT
2533 * WRITE_LIFE_NOT_SET WARM_DATA WRITE_LIFE_NOT_SET
2534 * WRITE_LIFE_NONE " "
2535 * WRITE_LIFE_MEDIUM " "
2536 * WRITE_LIFE_LONG " "
2537 *
2538 * -- direct io
2539 * WRITE_LIFE_EXTREME COLD_DATA WRITE_LIFE_EXTREME
2540 * WRITE_LIFE_SHORT HOT_DATA WRITE_LIFE_SHORT
2541 * WRITE_LIFE_NOT_SET WARM_DATA WRITE_LIFE_NOT_SET
2542 * WRITE_LIFE_NONE " WRITE_LIFE_NONE
2543 * WRITE_LIFE_MEDIUM " WRITE_LIFE_MEDIUM
2544 * WRITE_LIFE_LONG " WRITE_LIFE_LONG
2545 *
Hyunchul Lee87c18062018-01-31 11:36:58 +09002546 * 3) whint_mode=fs-based. F2FS passes down hints with its policy.
2547 *
2548 * User F2FS Block
2549 * ---- ---- -----
2550 * META WRITE_LIFE_MEDIUM;
2551 * HOT_NODE WRITE_LIFE_NOT_SET
2552 * WARM_NODE "
2553 * COLD_NODE WRITE_LIFE_NONE
2554 * ioctl(COLD) COLD_DATA WRITE_LIFE_EXTREME
2555 * extension list " "
2556 *
2557 * -- buffered io
2558 * WRITE_LIFE_EXTREME COLD_DATA WRITE_LIFE_EXTREME
2559 * WRITE_LIFE_SHORT HOT_DATA WRITE_LIFE_SHORT
2560 * WRITE_LIFE_NOT_SET WARM_DATA WRITE_LIFE_LONG
2561 * WRITE_LIFE_NONE " "
2562 * WRITE_LIFE_MEDIUM " "
2563 * WRITE_LIFE_LONG " "
2564 *
2565 * -- direct io
2566 * WRITE_LIFE_EXTREME COLD_DATA WRITE_LIFE_EXTREME
2567 * WRITE_LIFE_SHORT HOT_DATA WRITE_LIFE_SHORT
2568 * WRITE_LIFE_NOT_SET WARM_DATA WRITE_LIFE_NOT_SET
2569 * WRITE_LIFE_NONE " WRITE_LIFE_NONE
2570 * WRITE_LIFE_MEDIUM " WRITE_LIFE_MEDIUM
2571 * WRITE_LIFE_LONG " WRITE_LIFE_LONG
Hyunchul Leebcdc5712018-01-31 11:36:57 +09002572 */
2573
Chao Yu6b4d6a82018-05-30 00:20:41 +08002574enum rw_hint f2fs_io_type_to_rw_hint(struct f2fs_sb_info *sbi,
Hyunchul Leebcdc5712018-01-31 11:36:57 +09002575 enum page_type type, enum temp_type temp)
2576{
Chao Yue9a50e62018-03-08 14:22:56 +08002577 if (F2FS_OPTION(sbi).whint_mode == WHINT_MODE_USER) {
Hyunchul Leebcdc5712018-01-31 11:36:57 +09002578 if (type == DATA) {
Hyunchul Lee87c18062018-01-31 11:36:58 +09002579 if (temp == WARM)
Hyunchul Leebcdc5712018-01-31 11:36:57 +09002580 return WRITE_LIFE_NOT_SET;
Hyunchul Lee87c18062018-01-31 11:36:58 +09002581 else if (temp == HOT)
2582 return WRITE_LIFE_SHORT;
2583 else if (temp == COLD)
2584 return WRITE_LIFE_EXTREME;
Hyunchul Leebcdc5712018-01-31 11:36:57 +09002585 } else {
2586 return WRITE_LIFE_NOT_SET;
2587 }
Chao Yue9a50e62018-03-08 14:22:56 +08002588 } else if (F2FS_OPTION(sbi).whint_mode == WHINT_MODE_FS) {
Hyunchul Lee87c18062018-01-31 11:36:58 +09002589 if (type == DATA) {
2590 if (temp == WARM)
2591 return WRITE_LIFE_LONG;
2592 else if (temp == HOT)
2593 return WRITE_LIFE_SHORT;
2594 else if (temp == COLD)
2595 return WRITE_LIFE_EXTREME;
2596 } else if (type == NODE) {
2597 if (temp == WARM || temp == HOT)
2598 return WRITE_LIFE_NOT_SET;
2599 else if (temp == COLD)
2600 return WRITE_LIFE_NONE;
2601 } else if (type == META) {
2602 return WRITE_LIFE_MEDIUM;
2603 }
Hyunchul Leebcdc5712018-01-31 11:36:57 +09002604 }
Hyunchul Lee87c18062018-01-31 11:36:58 +09002605 return WRITE_LIFE_NOT_SET;
Hyunchul Leebcdc5712018-01-31 11:36:57 +09002606}
2607
Jaegeuk Kim72cc4582017-05-10 14:19:54 -07002608static int __get_segment_type_2(struct f2fs_io_info *fio)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002609{
Jaegeuk Kim72cc4582017-05-10 14:19:54 -07002610 if (fio->type == DATA)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002611 return CURSEG_HOT_DATA;
2612 else
2613 return CURSEG_HOT_NODE;
2614}
2615
Jaegeuk Kim72cc4582017-05-10 14:19:54 -07002616static int __get_segment_type_4(struct f2fs_io_info *fio)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002617{
Jaegeuk Kim72cc4582017-05-10 14:19:54 -07002618 if (fio->type == DATA) {
2619 struct inode *inode = fio->page->mapping->host;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002620
2621 if (S_ISDIR(inode->i_mode))
2622 return CURSEG_HOT_DATA;
2623 else
2624 return CURSEG_COLD_DATA;
2625 } else {
Jaegeuk Kim72cc4582017-05-10 14:19:54 -07002626 if (IS_DNODE(fio->page) && is_cold_node(fio->page))
Jaegeuk Kima344b9f2014-11-05 20:05:53 -08002627 return CURSEG_WARM_NODE;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002628 else
2629 return CURSEG_COLD_NODE;
2630 }
2631}
2632
Jaegeuk Kim72cc4582017-05-10 14:19:54 -07002633static int __get_segment_type_6(struct f2fs_io_info *fio)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002634{
Jaegeuk Kim72cc4582017-05-10 14:19:54 -07002635 if (fio->type == DATA) {
2636 struct inode *inode = fio->page->mapping->host;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002637
Jaegeuk Kim72cc4582017-05-10 14:19:54 -07002638 if (is_cold_data(fio->page) || file_is_cold(inode))
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002639 return CURSEG_COLD_DATA;
Chao Yuac734c42018-02-28 17:07:27 +08002640 if (file_is_hot(inode) ||
Chao Yuf921fa82018-04-26 17:05:50 +08002641 is_inode_flag_set(inode, FI_HOT_DATA) ||
2642 is_inode_flag_set(inode, FI_ATOMIC_FILE) ||
2643 is_inode_flag_set(inode, FI_VOLATILE_FILE))
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07002644 return CURSEG_HOT_DATA;
Chao Yu6b4d6a82018-05-30 00:20:41 +08002645 /* f2fs_rw_hint_to_seg_type(inode->i_write_hint); */
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07002646 return CURSEG_WARM_DATA;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002647 } else {
Jaegeuk Kim72cc4582017-05-10 14:19:54 -07002648 if (IS_DNODE(fio->page))
2649 return is_cold_node(fio->page) ? CURSEG_WARM_NODE :
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002650 CURSEG_HOT_NODE;
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07002651 return CURSEG_COLD_NODE;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002652 }
2653}
2654
Jaegeuk Kim72cc4582017-05-10 14:19:54 -07002655static int __get_segment_type(struct f2fs_io_info *fio)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002656{
Jaegeuk Kimc4127262017-05-10 11:18:25 -07002657 int type = 0;
2658
Chao Yue9a50e62018-03-08 14:22:56 +08002659 switch (F2FS_OPTION(fio->sbi).active_logs) {
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002660 case 2:
Jaegeuk Kimc4127262017-05-10 11:18:25 -07002661 type = __get_segment_type_2(fio);
2662 break;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002663 case 4:
Jaegeuk Kimc4127262017-05-10 11:18:25 -07002664 type = __get_segment_type_4(fio);
2665 break;
2666 case 6:
2667 type = __get_segment_type_6(fio);
2668 break;
2669 default:
2670 f2fs_bug_on(fio->sbi, true);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002671 }
Jaegeuk Kim72cc4582017-05-10 14:19:54 -07002672
Jaegeuk Kimc4127262017-05-10 11:18:25 -07002673 if (IS_HOT(type))
2674 fio->temp = HOT;
2675 else if (IS_WARM(type))
2676 fio->temp = WARM;
2677 else
2678 fio->temp = COLD;
2679 return type;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002680}
2681
Chao Yu6b4d6a82018-05-30 00:20:41 +08002682void f2fs_allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
Jaegeuk Kimbfad7c22013-12-16 19:04:05 +09002683 block_t old_blkaddr, block_t *new_blkaddr,
Chao Yuc52dc0f2017-05-19 23:37:01 +08002684 struct f2fs_summary *sum, int type,
2685 struct f2fs_io_info *fio, bool add_list)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002686{
2687 struct sit_info *sit_i = SIT_I(sbi);
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07002688 struct curseg_info *curseg = CURSEG_I(sbi, type);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002689
Chao Yu7f41aab2017-11-02 20:41:03 +08002690 down_read(&SM_I(sbi)->curseg_lock);
2691
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002692 mutex_lock(&curseg->curseg_mutex);
Chao Yu25d0bec2017-10-30 17:49:53 +08002693 down_write(&sit_i->sentry_lock);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002694
2695 *new_blkaddr = NEXT_FREE_BLKADDR(sbi, curseg);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002696
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07002697 f2fs_wait_discard_bio(sbi, *new_blkaddr);
2698
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002699 /*
2700 * __add_sum_entry should be resided under the curseg_mutex
2701 * because, this function updates a summary entry in the
2702 * current summary block.
2703 */
Haicheng Lie79efe32013-06-13 16:59:27 +08002704 __add_sum_entry(sbi, type, sum);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002705
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002706 __refresh_next_blkoff(sbi, curseg);
Jaegeuk Kimdcdfff62013-10-22 20:56:10 +09002707
2708 stat_inc_block_count(sbi, curseg);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002709
Yunlong Songc7272f82017-10-30 09:33:41 +08002710 /*
2711 * SIT information should be updated before segment allocation,
2712 * since SSR needs latest valid block information.
2713 */
2714 update_sit_entry(sbi, *new_blkaddr, 1);
2715 if (GET_SEGNO(sbi, old_blkaddr) != NULL_SEGNO)
2716 update_sit_entry(sbi, old_blkaddr, -1);
2717
Jaegeuk Kim5e443812014-01-28 12:22:14 +09002718 if (!__has_curseg_space(sbi, type))
2719 sit_i->s_ops->allocate_segment(sbi, type, false);
Yunlong Songc7272f82017-10-30 09:33:41 +08002720
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002721 /*
Yunlong Songc7272f82017-10-30 09:33:41 +08002722 * segment dirty status should be updated after segment allocation,
2723 * so we just need to update status only one time after previous
2724 * segment being closed.
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002725 */
Yunlong Songc7272f82017-10-30 09:33:41 +08002726 locate_dirty_segment(sbi, GET_SEGNO(sbi, old_blkaddr));
2727 locate_dirty_segment(sbi, GET_SEGNO(sbi, *new_blkaddr));
Jaegeuk Kim5e443812014-01-28 12:22:14 +09002728
Chao Yu25d0bec2017-10-30 17:49:53 +08002729 up_write(&sit_i->sentry_lock);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002730
Chao Yu43101252017-07-31 20:19:09 +08002731 if (page && IS_NODESEG(type)) {
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002732 fill_node_footer_blkaddr(page, NEXT_FREE_BLKADDR(sbi, curseg));
2733
Chao Yu43101252017-07-31 20:19:09 +08002734 f2fs_inode_chksum_set(sbi, page);
2735 }
2736
Chao Yuc52dc0f2017-05-19 23:37:01 +08002737 if (add_list) {
2738 struct f2fs_bio_info *io;
2739
2740 INIT_LIST_HEAD(&fio->list);
2741 fio->in_list = true;
Chao Yu34880e02018-05-28 23:47:18 +08002742 fio->retry = false;
Chao Yuc52dc0f2017-05-19 23:37:01 +08002743 io = sbi->write_io[fio->type] + fio->temp;
2744 spin_lock(&io->io_lock);
2745 list_add_tail(&fio->list, &io->io_list);
2746 spin_unlock(&io->io_lock);
2747 }
2748
Jaegeuk Kimbfad7c22013-12-16 19:04:05 +09002749 mutex_unlock(&curseg->curseg_mutex);
Chao Yu7f41aab2017-11-02 20:41:03 +08002750
2751 up_read(&SM_I(sbi)->curseg_lock);
Jaegeuk Kimbfad7c22013-12-16 19:04:05 +09002752}
2753
Chao Yuf014be82017-09-29 13:59:38 +08002754static void update_device_state(struct f2fs_io_info *fio)
2755{
2756 struct f2fs_sb_info *sbi = fio->sbi;
2757 unsigned int devidx;
2758
2759 if (!sbi->s_ndevs)
2760 return;
2761
2762 devidx = f2fs_target_device_index(sbi, fio->new_blkaddr);
2763
2764 /* update device state for fsync */
Chao Yu6b4d6a82018-05-30 00:20:41 +08002765 f2fs_set_dirty_device(sbi, fio->ino, devidx, FLUSH_INO);
Chao Yufd6422e2017-09-29 13:59:39 +08002766
2767 /* update device state for checkpoint */
2768 if (!f2fs_test_bit(devidx, (char *)&sbi->dirty_device)) {
2769 spin_lock(&sbi->dev_lock);
2770 f2fs_set_bit(devidx, (char *)&sbi->dirty_device);
2771 spin_unlock(&sbi->dev_lock);
2772 }
Chao Yuf014be82017-09-29 13:59:38 +08002773}
2774
Jaegeuk Kim05ca3632015-04-23 14:38:15 -07002775static void do_write_page(struct f2fs_summary *sum, struct f2fs_io_info *fio)
Jaegeuk Kimbfad7c22013-12-16 19:04:05 +09002776{
Jaegeuk Kim72cc4582017-05-10 14:19:54 -07002777 int type = __get_segment_type(fio);
Chao Yubbab2dc2018-05-26 09:00:13 +08002778 bool keep_order = (test_opt(fio->sbi, LFS) && type == CURSEG_COLD_DATA);
Jaegeuk Kimbfad7c22013-12-16 19:04:05 +09002779
Chao Yubbab2dc2018-05-26 09:00:13 +08002780 if (keep_order)
2781 down_read(&fio->sbi->io_order_lock);
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07002782reallocate:
Chao Yu6b4d6a82018-05-30 00:20:41 +08002783 f2fs_allocate_data_block(fio->sbi, fio->page, fio->old_blkaddr,
Chao Yuc52dc0f2017-05-19 23:37:01 +08002784 &fio->new_blkaddr, sum, type, fio, true);
Jaegeuk Kimbfad7c22013-12-16 19:04:05 +09002785
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002786 /* writeout dirty page into bdev */
Chao Yu34880e02018-05-28 23:47:18 +08002787 f2fs_submit_page_write(fio);
2788 if (fio->retry) {
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07002789 fio->old_blkaddr = fio->new_blkaddr;
2790 goto reallocate;
2791 }
Chao Yu34880e02018-05-28 23:47:18 +08002792
2793 update_device_state(fio);
2794
Chao Yubbab2dc2018-05-26 09:00:13 +08002795 if (keep_order)
2796 up_read(&fio->sbi->io_order_lock);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002797}
2798
Chao Yu6b4d6a82018-05-30 00:20:41 +08002799void f2fs_do_write_meta_page(struct f2fs_sb_info *sbi, struct page *page,
Chao Yuc0fe4882017-08-02 23:21:48 +08002800 enum iostat_type io_type)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002801{
Jaegeuk Kim458e6192013-12-11 13:54:01 +09002802 struct f2fs_io_info fio = {
Jaegeuk Kim05ca3632015-04-23 14:38:15 -07002803 .sbi = sbi,
Jaegeuk Kim458e6192013-12-11 13:54:01 +09002804 .type = META,
Hyunchul Leebcdc5712018-01-31 11:36:57 +09002805 .temp = HOT,
Mike Christie04d328d2016-06-05 14:31:55 -05002806 .op = REQ_OP_WRITE,
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07002807 .op_flags = REQ_SYNC | REQ_META | REQ_PRIO,
Chao Yu7a9d7542016-02-22 18:36:38 +08002808 .old_blkaddr = page->index,
2809 .new_blkaddr = page->index,
Jaegeuk Kim05ca3632015-04-23 14:38:15 -07002810 .page = page,
Jaegeuk Kim4375a332015-04-23 12:04:33 -07002811 .encrypted_page = NULL,
Chao Yuc52dc0f2017-05-19 23:37:01 +08002812 .in_list = false,
Jaegeuk Kim458e6192013-12-11 13:54:01 +09002813 };
2814
Chao Yu2b947002015-10-12 17:04:21 +08002815 if (unlikely(page->index >= MAIN_BLKADDR(sbi)))
Mike Christie04d328d2016-06-05 14:31:55 -05002816 fio.op_flags &= ~REQ_META;
Chao Yu2b947002015-10-12 17:04:21 +08002817
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002818 set_page_writeback(page);
Jaegeuk Kimf4531472018-04-11 23:09:04 -07002819 ClearPageError(page);
Jaegeuk Kim9bc576a2017-05-10 11:28:38 -07002820 f2fs_submit_page_write(&fio);
Chao Yuc0fe4882017-08-02 23:21:48 +08002821
2822 f2fs_update_iostat(sbi, io_type, F2FS_BLKSIZE);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002823}
2824
Chao Yu6b4d6a82018-05-30 00:20:41 +08002825void f2fs_do_write_node_page(unsigned int nid, struct f2fs_io_info *fio)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002826{
2827 struct f2fs_summary sum;
Jaegeuk Kim05ca3632015-04-23 14:38:15 -07002828
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002829 set_summary(&sum, nid, 0, 0);
Jaegeuk Kim05ca3632015-04-23 14:38:15 -07002830 do_write_page(&sum, fio);
Chao Yuc0fe4882017-08-02 23:21:48 +08002831
2832 f2fs_update_iostat(fio->sbi, fio->io_type, F2FS_BLKSIZE);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002833}
2834
Chao Yu6b4d6a82018-05-30 00:20:41 +08002835void f2fs_outplace_write_data(struct dnode_of_data *dn,
2836 struct f2fs_io_info *fio)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002837{
Jaegeuk Kim05ca3632015-04-23 14:38:15 -07002838 struct f2fs_sb_info *sbi = fio->sbi;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002839 struct f2fs_summary sum;
2840 struct node_info ni;
2841
Jaegeuk Kim9850cf42014-09-02 15:52:58 -07002842 f2fs_bug_on(sbi, dn->data_blkaddr == NULL_ADDR);
Chao Yu6b4d6a82018-05-30 00:20:41 +08002843 f2fs_get_node_info(sbi, dn->nid, &ni);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002844 set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version);
Jaegeuk Kim05ca3632015-04-23 14:38:15 -07002845 do_write_page(&sum, fio);
Chao Yuf28b3432016-02-24 17:16:47 +08002846 f2fs_update_data_blkaddr(dn, fio->new_blkaddr);
Chao Yuc0fe4882017-08-02 23:21:48 +08002847
2848 f2fs_update_iostat(sbi, fio->io_type, F2FS_BLKSIZE);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002849}
2850
Chao Yu6b4d6a82018-05-30 00:20:41 +08002851int f2fs_inplace_write_data(struct f2fs_io_info *fio)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002852{
Chao Yuc0fe4882017-08-02 23:21:48 +08002853 int err;
Yunlei He848b2932018-03-26 17:32:23 +08002854 struct f2fs_sb_info *sbi = fio->sbi;
Chao Yuc0fe4882017-08-02 23:21:48 +08002855
Chao Yu7a9d7542016-02-22 18:36:38 +08002856 fio->new_blkaddr = fio->old_blkaddr;
Hyunchul Leebcdc5712018-01-31 11:36:57 +09002857 /* i/o temperature is needed for passing down write hints */
2858 __get_segment_type(fio);
Yunlei He848b2932018-03-26 17:32:23 +08002859
2860 f2fs_bug_on(sbi, !IS_DATASEG(get_seg_entry(sbi,
2861 GET_SEGNO(sbi, fio->new_blkaddr))->type));
2862
Jaegeuk Kim05ca3632015-04-23 14:38:15 -07002863 stat_inc_inplace_blocks(fio->sbi);
Chao Yuc0fe4882017-08-02 23:21:48 +08002864
2865 err = f2fs_submit_page_bio(fio);
Chao Yuf014be82017-09-29 13:59:38 +08002866 if (!err)
2867 update_device_state(fio);
Chao Yuc0fe4882017-08-02 23:21:48 +08002868
2869 f2fs_update_iostat(fio->sbi, fio->io_type, F2FS_BLKSIZE);
2870
2871 return err;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002872}
2873
Chao Yu7f41aab2017-11-02 20:41:03 +08002874static inline int __f2fs_get_curseg(struct f2fs_sb_info *sbi,
2875 unsigned int segno)
2876{
2877 int i;
2878
2879 for (i = CURSEG_HOT_DATA; i < NO_CHECK_TYPE; i++) {
2880 if (CURSEG_I(sbi, i)->segno == segno)
2881 break;
2882 }
2883 return i;
2884}
2885
Chao Yu6b4d6a82018-05-30 00:20:41 +08002886void f2fs_do_replace_block(struct f2fs_sb_info *sbi, struct f2fs_summary *sum,
Chao Yu19f106b2015-05-06 13:08:06 +08002887 block_t old_blkaddr, block_t new_blkaddr,
Chao Yu28bc1062016-02-06 14:40:34 +08002888 bool recover_curseg, bool recover_newaddr)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002889{
2890 struct sit_info *sit_i = SIT_I(sbi);
2891 struct curseg_info *curseg;
2892 unsigned int segno, old_cursegno;
2893 struct seg_entry *se;
2894 int type;
Chao Yu19f106b2015-05-06 13:08:06 +08002895 unsigned short old_blkoff;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002896
2897 segno = GET_SEGNO(sbi, new_blkaddr);
2898 se = get_seg_entry(sbi, segno);
2899 type = se->type;
2900
Chao Yu7f41aab2017-11-02 20:41:03 +08002901 down_write(&SM_I(sbi)->curseg_lock);
2902
Chao Yu19f106b2015-05-06 13:08:06 +08002903 if (!recover_curseg) {
2904 /* for recovery flow */
2905 if (se->valid_blocks == 0 && !IS_CURSEG(sbi, segno)) {
2906 if (old_blkaddr == NULL_ADDR)
2907 type = CURSEG_COLD_DATA;
2908 else
2909 type = CURSEG_WARM_DATA;
2910 }
2911 } else {
Chao Yu7f41aab2017-11-02 20:41:03 +08002912 if (IS_CURSEG(sbi, segno)) {
2913 /* se->type is volatile as SSR allocation */
2914 type = __f2fs_get_curseg(sbi, segno);
2915 f2fs_bug_on(sbi, type == NO_CHECK_TYPE);
2916 } else {
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002917 type = CURSEG_WARM_DATA;
Chao Yu7f41aab2017-11-02 20:41:03 +08002918 }
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002919 }
Chao Yu19f106b2015-05-06 13:08:06 +08002920
Yunlong Song26597462018-01-04 15:02:02 +08002921 f2fs_bug_on(sbi, !IS_DATASEG(type));
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002922 curseg = CURSEG_I(sbi, type);
2923
2924 mutex_lock(&curseg->curseg_mutex);
Chao Yu25d0bec2017-10-30 17:49:53 +08002925 down_write(&sit_i->sentry_lock);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002926
2927 old_cursegno = curseg->segno;
Chao Yu19f106b2015-05-06 13:08:06 +08002928 old_blkoff = curseg->next_blkoff;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002929
2930 /* change the current segment */
2931 if (segno != curseg->segno) {
2932 curseg->next_segno = segno;
Chao Yua69c9742017-08-30 18:04:48 +08002933 change_curseg(sbi, type);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002934 }
2935
Jaegeuk Kim491c0852014-02-04 13:01:10 +09002936 curseg->next_blkoff = GET_BLKOFF_FROM_SEG0(sbi, new_blkaddr);
Haicheng Lie79efe32013-06-13 16:59:27 +08002937 __add_sum_entry(sbi, type, sum);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002938
Chao Yu28bc1062016-02-06 14:40:34 +08002939 if (!recover_curseg || recover_newaddr)
Jaegeuk Kim6e2c64a2015-10-07 12:28:41 -07002940 update_sit_entry(sbi, new_blkaddr, 1);
2941 if (GET_SEGNO(sbi, old_blkaddr) != NULL_SEGNO)
2942 update_sit_entry(sbi, old_blkaddr, -1);
2943
2944 locate_dirty_segment(sbi, GET_SEGNO(sbi, old_blkaddr));
2945 locate_dirty_segment(sbi, GET_SEGNO(sbi, new_blkaddr));
2946
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002947 locate_dirty_segment(sbi, old_cursegno);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002948
Chao Yu19f106b2015-05-06 13:08:06 +08002949 if (recover_curseg) {
2950 if (old_cursegno != curseg->segno) {
2951 curseg->next_segno = old_cursegno;
Chao Yua69c9742017-08-30 18:04:48 +08002952 change_curseg(sbi, type);
Chao Yu19f106b2015-05-06 13:08:06 +08002953 }
2954 curseg->next_blkoff = old_blkoff;
2955 }
2956
Chao Yu25d0bec2017-10-30 17:49:53 +08002957 up_write(&sit_i->sentry_lock);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002958 mutex_unlock(&curseg->curseg_mutex);
Chao Yu7f41aab2017-11-02 20:41:03 +08002959 up_write(&SM_I(sbi)->curseg_lock);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002960}
2961
Chao Yu528e3452015-05-28 19:15:35 +08002962void f2fs_replace_block(struct f2fs_sb_info *sbi, struct dnode_of_data *dn,
2963 block_t old_addr, block_t new_addr,
Chao Yu28bc1062016-02-06 14:40:34 +08002964 unsigned char version, bool recover_curseg,
2965 bool recover_newaddr)
Chao Yu528e3452015-05-28 19:15:35 +08002966{
2967 struct f2fs_summary sum;
2968
2969 set_summary(&sum, dn->nid, dn->ofs_in_node, version);
2970
Chao Yu6b4d6a82018-05-30 00:20:41 +08002971 f2fs_do_replace_block(sbi, &sum, old_addr, new_addr,
Chao Yu28bc1062016-02-06 14:40:34 +08002972 recover_curseg, recover_newaddr);
Chao Yu528e3452015-05-28 19:15:35 +08002973
Chao Yuf28b3432016-02-24 17:16:47 +08002974 f2fs_update_data_blkaddr(dn, new_addr);
Chao Yu528e3452015-05-28 19:15:35 +08002975}
2976
Jaegeuk Kim93dfe2a2013-11-30 12:51:14 +09002977void f2fs_wait_on_page_writeback(struct page *page,
Jaegeuk Kimfec1d652016-01-20 23:43:51 +08002978 enum page_type type, bool ordered)
Jaegeuk Kim93dfe2a2013-11-30 12:51:14 +09002979{
Jaegeuk Kim93dfe2a2013-11-30 12:51:14 +09002980 if (PageWriteback(page)) {
Jaegeuk Kim40813632014-09-02 15:31:18 -07002981 struct f2fs_sb_info *sbi = F2FS_P_SB(page);
2982
Jaegeuk Kim9bc576a2017-05-10 11:28:38 -07002983 f2fs_submit_merged_write_cond(sbi, page->mapping->host,
2984 0, page->index, type);
Jaegeuk Kimfec1d652016-01-20 23:43:51 +08002985 if (ordered)
2986 wait_on_page_writeback(page);
2987 else
2988 wait_for_stable_page(page);
Jaegeuk Kim93dfe2a2013-11-30 12:51:14 +09002989 }
2990}
2991
Jaegeuk Kimfb605d02017-09-05 17:04:35 -07002992void f2fs_wait_on_block_writeback(struct f2fs_sb_info *sbi, block_t blkaddr)
Chao Yu08b39fb2015-10-08 13:27:34 +08002993{
2994 struct page *cpage;
2995
Chao Yu158d9bb2018-05-23 22:25:08 +08002996 if (!is_valid_blkaddr(blkaddr))
Chao Yu08b39fb2015-10-08 13:27:34 +08002997 return;
2998
Chao Yu08b39fb2015-10-08 13:27:34 +08002999 cpage = find_lock_page(META_MAPPING(sbi), blkaddr);
3000 if (cpage) {
Jaegeuk Kimfec1d652016-01-20 23:43:51 +08003001 f2fs_wait_on_page_writeback(cpage, DATA, true);
Chao Yu08b39fb2015-10-08 13:27:34 +08003002 f2fs_put_page(cpage, 1);
3003 }
3004}
3005
Yunlei Hec804fcf2017-12-06 11:31:29 +08003006static void read_compacted_summaries(struct f2fs_sb_info *sbi)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003007{
3008 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
3009 struct curseg_info *seg_i;
3010 unsigned char *kaddr;
3011 struct page *page;
3012 block_t start;
3013 int i, j, offset;
3014
3015 start = start_sum_block(sbi);
3016
Chao Yu6b4d6a82018-05-30 00:20:41 +08003017 page = f2fs_get_meta_page(sbi, start++);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003018 kaddr = (unsigned char *)page_address(page);
3019
3020 /* Step 1: restore nat cache */
3021 seg_i = CURSEG_I(sbi, CURSEG_HOT_DATA);
Chao Yub7ad7512016-02-19 18:08:46 +08003022 memcpy(seg_i->journal, kaddr, SUM_JOURNAL_SIZE);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003023
3024 /* Step 2: restore sit cache */
3025 seg_i = CURSEG_I(sbi, CURSEG_COLD_DATA);
Chao Yub7ad7512016-02-19 18:08:46 +08003026 memcpy(seg_i->journal, kaddr + SUM_JOURNAL_SIZE, SUM_JOURNAL_SIZE);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003027 offset = 2 * SUM_JOURNAL_SIZE;
3028
3029 /* Step 3: restore summary entries */
3030 for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) {
3031 unsigned short blk_off;
3032 unsigned int segno;
3033
3034 seg_i = CURSEG_I(sbi, i);
3035 segno = le32_to_cpu(ckpt->cur_data_segno[i]);
3036 blk_off = le16_to_cpu(ckpt->cur_data_blkoff[i]);
3037 seg_i->next_segno = segno;
3038 reset_curseg(sbi, i, 0);
3039 seg_i->alloc_type = ckpt->alloc_type[i];
3040 seg_i->next_blkoff = blk_off;
3041
3042 if (seg_i->alloc_type == SSR)
3043 blk_off = sbi->blocks_per_seg;
3044
3045 for (j = 0; j < blk_off; j++) {
3046 struct f2fs_summary *s;
3047 s = (struct f2fs_summary *)(kaddr + offset);
3048 seg_i->sum_blk->entries[j] = *s;
3049 offset += SUMMARY_SIZE;
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +03003050 if (offset + SUMMARY_SIZE <= PAGE_SIZE -
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003051 SUM_FOOTER_SIZE)
3052 continue;
3053
3054 f2fs_put_page(page, 1);
3055 page = NULL;
3056
Chao Yu6b4d6a82018-05-30 00:20:41 +08003057 page = f2fs_get_meta_page(sbi, start++);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003058 kaddr = (unsigned char *)page_address(page);
3059 offset = 0;
3060 }
3061 }
3062 f2fs_put_page(page, 1);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003063}
3064
3065static int read_normal_summaries(struct f2fs_sb_info *sbi, int type)
3066{
3067 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
3068 struct f2fs_summary_block *sum;
3069 struct curseg_info *curseg;
3070 struct page *new;
3071 unsigned short blk_off;
3072 unsigned int segno = 0;
3073 block_t blk_addr = 0;
3074
3075 /* get segment number and block addr */
3076 if (IS_DATASEG(type)) {
3077 segno = le32_to_cpu(ckpt->cur_data_segno[type]);
3078 blk_off = le16_to_cpu(ckpt->cur_data_blkoff[type -
3079 CURSEG_HOT_DATA]);
Jaegeuk Kim119ee912015-01-29 11:45:33 -08003080 if (__exist_node_summaries(sbi))
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003081 blk_addr = sum_blk_addr(sbi, NR_CURSEG_TYPE, type);
3082 else
3083 blk_addr = sum_blk_addr(sbi, NR_CURSEG_DATA_TYPE, type);
3084 } else {
3085 segno = le32_to_cpu(ckpt->cur_node_segno[type -
3086 CURSEG_HOT_NODE]);
3087 blk_off = le16_to_cpu(ckpt->cur_node_blkoff[type -
3088 CURSEG_HOT_NODE]);
Jaegeuk Kim119ee912015-01-29 11:45:33 -08003089 if (__exist_node_summaries(sbi))
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003090 blk_addr = sum_blk_addr(sbi, NR_CURSEG_NODE_TYPE,
3091 type - CURSEG_HOT_NODE);
3092 else
3093 blk_addr = GET_SUM_BLOCK(sbi, segno);
3094 }
3095
Chao Yu6b4d6a82018-05-30 00:20:41 +08003096 new = f2fs_get_meta_page(sbi, blk_addr);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003097 sum = (struct f2fs_summary_block *)page_address(new);
3098
3099 if (IS_NODESEG(type)) {
Jaegeuk Kim119ee912015-01-29 11:45:33 -08003100 if (__exist_node_summaries(sbi)) {
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003101 struct f2fs_summary *ns = &sum->entries[0];
3102 int i;
3103 for (i = 0; i < sbi->blocks_per_seg; i++, ns++) {
3104 ns->version = 0;
3105 ns->ofs_in_node = 0;
3106 }
3107 } else {
Chao Yu6b4d6a82018-05-30 00:20:41 +08003108 f2fs_restore_node_summary(sbi, segno, sum);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003109 }
3110 }
3111
3112 /* set uncompleted segment to curseg */
3113 curseg = CURSEG_I(sbi, type);
3114 mutex_lock(&curseg->curseg_mutex);
Chao Yub7ad7512016-02-19 18:08:46 +08003115
3116 /* update journal info */
3117 down_write(&curseg->journal_rwsem);
3118 memcpy(curseg->journal, &sum->journal, SUM_JOURNAL_SIZE);
3119 up_write(&curseg->journal_rwsem);
3120
3121 memcpy(curseg->sum_blk->entries, sum->entries, SUM_ENTRY_SIZE);
3122 memcpy(&curseg->sum_blk->footer, &sum->footer, SUM_FOOTER_SIZE);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003123 curseg->next_segno = segno;
3124 reset_curseg(sbi, type, 0);
3125 curseg->alloc_type = ckpt->alloc_type[type];
3126 curseg->next_blkoff = blk_off;
3127 mutex_unlock(&curseg->curseg_mutex);
3128 f2fs_put_page(new, 1);
3129 return 0;
3130}
3131
3132static int restore_curseg_summaries(struct f2fs_sb_info *sbi)
3133{
Jin Qiana8d61752017-06-01 11:18:30 -07003134 struct f2fs_journal *sit_j = CURSEG_I(sbi, CURSEG_COLD_DATA)->journal;
3135 struct f2fs_journal *nat_j = CURSEG_I(sbi, CURSEG_HOT_DATA)->journal;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003136 int type = CURSEG_HOT_DATA;
Chao Yue4fc5fb2014-03-17 16:36:24 +08003137 int err;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003138
Chao Yuaaec2b12016-09-20 11:04:18 +08003139 if (is_set_ckpt_flags(sbi, CP_COMPACT_SUM_FLAG)) {
Chao Yu6b4d6a82018-05-30 00:20:41 +08003140 int npages = f2fs_npages_for_summary_flush(sbi, true);
Chao Yu3fa06d72014-12-09 14:21:46 +08003141
3142 if (npages >= 2)
Chao Yu6b4d6a82018-05-30 00:20:41 +08003143 f2fs_ra_meta_pages(sbi, start_sum_block(sbi), npages,
Chao Yu26879fb2015-10-12 17:05:59 +08003144 META_CP, true);
Chao Yu3fa06d72014-12-09 14:21:46 +08003145
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003146 /* restore for compacted data summary */
Yunlei Hec804fcf2017-12-06 11:31:29 +08003147 read_compacted_summaries(sbi);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003148 type = CURSEG_HOT_NODE;
3149 }
3150
Jaegeuk Kim119ee912015-01-29 11:45:33 -08003151 if (__exist_node_summaries(sbi))
Chao Yu6b4d6a82018-05-30 00:20:41 +08003152 f2fs_ra_meta_pages(sbi, sum_blk_addr(sbi, NR_CURSEG_TYPE, type),
Chao Yu26879fb2015-10-12 17:05:59 +08003153 NR_CURSEG_TYPE - type, META_CP, true);
Chao Yu3fa06d72014-12-09 14:21:46 +08003154
Chao Yue4fc5fb2014-03-17 16:36:24 +08003155 for (; type <= CURSEG_COLD_NODE; type++) {
3156 err = read_normal_summaries(sbi, type);
3157 if (err)
3158 return err;
3159 }
3160
Jin Qiana8d61752017-06-01 11:18:30 -07003161 /* sanity check for summary blocks */
3162 if (nats_in_cursum(nat_j) > NAT_JOURNAL_ENTRIES ||
3163 sits_in_cursum(sit_j) > SIT_JOURNAL_ENTRIES)
3164 return -EINVAL;
3165
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003166 return 0;
3167}
3168
3169static void write_compacted_summaries(struct f2fs_sb_info *sbi, block_t blkaddr)
3170{
3171 struct page *page;
3172 unsigned char *kaddr;
3173 struct f2fs_summary *summary;
3174 struct curseg_info *seg_i;
3175 int written_size = 0;
3176 int i, j;
3177
Chao Yu6b4d6a82018-05-30 00:20:41 +08003178 page = f2fs_grab_meta_page(sbi, blkaddr++);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003179 kaddr = (unsigned char *)page_address(page);
Chao Yu7aee0582018-04-09 20:25:06 +08003180 memset(kaddr, 0, PAGE_SIZE);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003181
3182 /* Step 1: write nat cache */
3183 seg_i = CURSEG_I(sbi, CURSEG_HOT_DATA);
Chao Yub7ad7512016-02-19 18:08:46 +08003184 memcpy(kaddr, seg_i->journal, SUM_JOURNAL_SIZE);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003185 written_size += SUM_JOURNAL_SIZE;
3186
3187 /* Step 2: write sit cache */
3188 seg_i = CURSEG_I(sbi, CURSEG_COLD_DATA);
Chao Yub7ad7512016-02-19 18:08:46 +08003189 memcpy(kaddr + written_size, seg_i->journal, SUM_JOURNAL_SIZE);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003190 written_size += SUM_JOURNAL_SIZE;
3191
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003192 /* Step 3: write summary entries */
3193 for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) {
3194 unsigned short blkoff;
3195 seg_i = CURSEG_I(sbi, i);
3196 if (sbi->ckpt->alloc_type[i] == SSR)
3197 blkoff = sbi->blocks_per_seg;
3198 else
3199 blkoff = curseg_blkoff(sbi, i);
3200
3201 for (j = 0; j < blkoff; j++) {
3202 if (!page) {
Chao Yu6b4d6a82018-05-30 00:20:41 +08003203 page = f2fs_grab_meta_page(sbi, blkaddr++);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003204 kaddr = (unsigned char *)page_address(page);
Chao Yu7aee0582018-04-09 20:25:06 +08003205 memset(kaddr, 0, PAGE_SIZE);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003206 written_size = 0;
3207 }
3208 summary = (struct f2fs_summary *)(kaddr + written_size);
3209 *summary = seg_i->sum_blk->entries[j];
3210 written_size += SUMMARY_SIZE;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003211
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +03003212 if (written_size + SUMMARY_SIZE <= PAGE_SIZE -
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003213 SUM_FOOTER_SIZE)
3214 continue;
3215
Chao Yue8d61a72013-10-24 15:08:28 +08003216 set_page_dirty(page);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003217 f2fs_put_page(page, 1);
3218 page = NULL;
3219 }
3220 }
Chao Yue8d61a72013-10-24 15:08:28 +08003221 if (page) {
3222 set_page_dirty(page);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003223 f2fs_put_page(page, 1);
Chao Yue8d61a72013-10-24 15:08:28 +08003224 }
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003225}
3226
3227static void write_normal_summaries(struct f2fs_sb_info *sbi,
3228 block_t blkaddr, int type)
3229{
3230 int i, end;
3231 if (IS_DATASEG(type))
3232 end = type + NR_CURSEG_DATA_TYPE;
3233 else
3234 end = type + NR_CURSEG_NODE_TYPE;
3235
Chao Yub7ad7512016-02-19 18:08:46 +08003236 for (i = type; i < end; i++)
3237 write_current_sum_page(sbi, i, blkaddr + (i - type));
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003238}
3239
Chao Yu6b4d6a82018-05-30 00:20:41 +08003240void f2fs_write_data_summaries(struct f2fs_sb_info *sbi, block_t start_blk)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003241{
Chao Yuaaec2b12016-09-20 11:04:18 +08003242 if (is_set_ckpt_flags(sbi, CP_COMPACT_SUM_FLAG))
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003243 write_compacted_summaries(sbi, start_blk);
3244 else
3245 write_normal_summaries(sbi, start_blk, CURSEG_HOT_DATA);
3246}
3247
Chao Yu6b4d6a82018-05-30 00:20:41 +08003248void f2fs_write_node_summaries(struct f2fs_sb_info *sbi, block_t start_blk)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003249{
Jaegeuk Kim119ee912015-01-29 11:45:33 -08003250 write_normal_summaries(sbi, start_blk, CURSEG_HOT_NODE);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003251}
3252
Chao Yu6b4d6a82018-05-30 00:20:41 +08003253int f2fs_lookup_journal_in_cursum(struct f2fs_journal *journal, int type,
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003254 unsigned int val, int alloc)
3255{
3256 int i;
3257
3258 if (type == NAT_JOURNAL) {
Chao Yudfc08a12016-02-14 18:50:40 +08003259 for (i = 0; i < nats_in_cursum(journal); i++) {
3260 if (le32_to_cpu(nid_in_journal(journal, i)) == val)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003261 return i;
3262 }
Chao Yudfc08a12016-02-14 18:50:40 +08003263 if (alloc && __has_cursum_space(journal, 1, NAT_JOURNAL))
3264 return update_nats_in_cursum(journal, 1);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003265 } else if (type == SIT_JOURNAL) {
Chao Yudfc08a12016-02-14 18:50:40 +08003266 for (i = 0; i < sits_in_cursum(journal); i++)
3267 if (le32_to_cpu(segno_in_journal(journal, i)) == val)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003268 return i;
Chao Yudfc08a12016-02-14 18:50:40 +08003269 if (alloc && __has_cursum_space(journal, 1, SIT_JOURNAL))
3270 return update_sits_in_cursum(journal, 1);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003271 }
3272 return -1;
3273}
3274
3275static struct page *get_current_sit_page(struct f2fs_sb_info *sbi,
3276 unsigned int segno)
3277{
Chao Yu6b4d6a82018-05-30 00:20:41 +08003278 return f2fs_get_meta_page(sbi, current_sit_addr(sbi, segno));
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003279}
3280
3281static struct page *get_next_sit_page(struct f2fs_sb_info *sbi,
3282 unsigned int start)
3283{
3284 struct sit_info *sit_i = SIT_I(sbi);
Yunlei He58dc6f62018-01-25 17:27:11 +08003285 struct page *page;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003286 pgoff_t src_off, dst_off;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003287
3288 src_off = current_sit_addr(sbi, start);
3289 dst_off = next_sit_addr(sbi, src_off);
3290
Chao Yu6b4d6a82018-05-30 00:20:41 +08003291 page = f2fs_grab_meta_page(sbi, dst_off);
Yunlei He58dc6f62018-01-25 17:27:11 +08003292 seg_info_to_sit_page(sbi, page, start);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003293
Yunlei He58dc6f62018-01-25 17:27:11 +08003294 set_page_dirty(page);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003295 set_to_next_sit(sit_i, start);
3296
Yunlei He58dc6f62018-01-25 17:27:11 +08003297 return page;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003298}
3299
Chao Yu184a5cd2014-09-04 18:13:01 +08003300static struct sit_entry_set *grab_sit_entry_set(void)
3301{
3302 struct sit_entry_set *ses =
Jaegeuk Kim80c54502015-08-20 08:51:56 -07003303 f2fs_kmem_cache_alloc(sit_entry_set_slab, GFP_NOFS);
Chao Yu184a5cd2014-09-04 18:13:01 +08003304
3305 ses->entry_cnt = 0;
3306 INIT_LIST_HEAD(&ses->set_list);
3307 return ses;
3308}
3309
3310static void release_sit_entry_set(struct sit_entry_set *ses)
3311{
3312 list_del(&ses->set_list);
3313 kmem_cache_free(sit_entry_set_slab, ses);
3314}
3315
3316static void adjust_sit_entry_set(struct sit_entry_set *ses,
3317 struct list_head *head)
3318{
3319 struct sit_entry_set *next = ses;
3320
3321 if (list_is_last(&ses->set_list, head))
3322 return;
3323
3324 list_for_each_entry_continue(next, head, set_list)
3325 if (ses->entry_cnt <= next->entry_cnt)
3326 break;
3327
3328 list_move_tail(&ses->set_list, &next->set_list);
3329}
3330
3331static void add_sit_entry(unsigned int segno, struct list_head *head)
3332{
3333 struct sit_entry_set *ses;
3334 unsigned int start_segno = START_SEGNO(segno);
3335
3336 list_for_each_entry(ses, head, set_list) {
3337 if (ses->start_segno == start_segno) {
3338 ses->entry_cnt++;
3339 adjust_sit_entry_set(ses, head);
3340 return;
3341 }
3342 }
3343
3344 ses = grab_sit_entry_set();
3345
3346 ses->start_segno = start_segno;
3347 ses->entry_cnt++;
3348 list_add(&ses->set_list, head);
3349}
3350
3351static void add_sits_in_set(struct f2fs_sb_info *sbi)
3352{
3353 struct f2fs_sm_info *sm_info = SM_I(sbi);
3354 struct list_head *set_list = &sm_info->sit_entry_set;
3355 unsigned long *bitmap = SIT_I(sbi)->dirty_sentries_bitmap;
Chao Yu184a5cd2014-09-04 18:13:01 +08003356 unsigned int segno;
3357
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07003358 for_each_set_bit(segno, bitmap, MAIN_SEGS(sbi))
Chao Yu184a5cd2014-09-04 18:13:01 +08003359 add_sit_entry(segno, set_list);
3360}
3361
3362static void remove_sits_in_journal(struct f2fs_sb_info *sbi)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003363{
3364 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA);
Chao Yub7ad7512016-02-19 18:08:46 +08003365 struct f2fs_journal *journal = curseg->journal;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003366 int i;
3367
Chao Yub7ad7512016-02-19 18:08:46 +08003368 down_write(&curseg->journal_rwsem);
Chao Yudfc08a12016-02-14 18:50:40 +08003369 for (i = 0; i < sits_in_cursum(journal); i++) {
Chao Yu184a5cd2014-09-04 18:13:01 +08003370 unsigned int segno;
3371 bool dirtied;
3372
Chao Yudfc08a12016-02-14 18:50:40 +08003373 segno = le32_to_cpu(segno_in_journal(journal, i));
Chao Yu184a5cd2014-09-04 18:13:01 +08003374 dirtied = __mark_sit_entry_dirty(sbi, segno);
3375
3376 if (!dirtied)
3377 add_sit_entry(segno, &SM_I(sbi)->sit_entry_set);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003378 }
Chao Yudfc08a12016-02-14 18:50:40 +08003379 update_sits_in_cursum(journal, -i);
Chao Yub7ad7512016-02-19 18:08:46 +08003380 up_write(&curseg->journal_rwsem);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003381}
3382
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +09003383/*
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003384 * CP calls this function, which flushes SIT entries including sit_journal,
3385 * and moves prefree segs to free segs.
3386 */
Chao Yu6b4d6a82018-05-30 00:20:41 +08003387void f2fs_flush_sit_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003388{
3389 struct sit_info *sit_i = SIT_I(sbi);
3390 unsigned long *bitmap = sit_i->dirty_sentries_bitmap;
3391 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA);
Chao Yub7ad7512016-02-19 18:08:46 +08003392 struct f2fs_journal *journal = curseg->journal;
Chao Yu184a5cd2014-09-04 18:13:01 +08003393 struct sit_entry_set *ses, *tmp;
3394 struct list_head *head = &SM_I(sbi)->sit_entry_set;
Chao Yu184a5cd2014-09-04 18:13:01 +08003395 bool to_journal = true;
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -07003396 struct seg_entry *se;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003397
Chao Yu25d0bec2017-10-30 17:49:53 +08003398 down_write(&sit_i->sentry_lock);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003399
Wanpeng Li2b11a742015-02-27 16:52:50 +08003400 if (!sit_i->dirty_sentries)
3401 goto out;
3402
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003403 /*
Chao Yu184a5cd2014-09-04 18:13:01 +08003404 * add and account sit entries of dirty bitmap in sit entry
3405 * set temporarily
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003406 */
Chao Yu184a5cd2014-09-04 18:13:01 +08003407 add_sits_in_set(sbi);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003408
Chao Yu184a5cd2014-09-04 18:13:01 +08003409 /*
3410 * if there are no enough space in journal to store dirty sit
3411 * entries, remove all entries from journal and add and account
3412 * them in sit entry set.
3413 */
Chao Yudfc08a12016-02-14 18:50:40 +08003414 if (!__has_cursum_space(journal, sit_i->dirty_sentries, SIT_JOURNAL))
Chao Yu184a5cd2014-09-04 18:13:01 +08003415 remove_sits_in_journal(sbi);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003416
Chao Yu184a5cd2014-09-04 18:13:01 +08003417 /*
3418 * there are two steps to flush sit entries:
3419 * #1, flush sit entries to journal in current cold data summary block.
3420 * #2, flush sit entries to sit page.
3421 */
3422 list_for_each_entry_safe(ses, tmp, head, set_list) {
Jaegeuk Kim4a257ed2014-10-16 11:43:30 -07003423 struct page *page = NULL;
Chao Yu184a5cd2014-09-04 18:13:01 +08003424 struct f2fs_sit_block *raw_sit = NULL;
3425 unsigned int start_segno = ses->start_segno;
3426 unsigned int end = min(start_segno + SIT_ENTRY_PER_BLOCK,
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07003427 (unsigned long)MAIN_SEGS(sbi));
Chao Yu184a5cd2014-09-04 18:13:01 +08003428 unsigned int segno = start_segno;
Jaegeuk Kimb2955552013-11-12 14:49:56 +09003429
Chao Yu184a5cd2014-09-04 18:13:01 +08003430 if (to_journal &&
Chao Yudfc08a12016-02-14 18:50:40 +08003431 !__has_cursum_space(journal, ses->entry_cnt, SIT_JOURNAL))
Chao Yu184a5cd2014-09-04 18:13:01 +08003432 to_journal = false;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003433
Chao Yub7ad7512016-02-19 18:08:46 +08003434 if (to_journal) {
3435 down_write(&curseg->journal_rwsem);
3436 } else {
Chao Yu184a5cd2014-09-04 18:13:01 +08003437 page = get_next_sit_page(sbi, start_segno);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003438 raw_sit = page_address(page);
3439 }
3440
Chao Yu184a5cd2014-09-04 18:13:01 +08003441 /* flush dirty sit entries in region of current sit set */
3442 for_each_set_bit_from(segno, bitmap, end) {
3443 int offset, sit_offset;
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -07003444
3445 se = get_seg_entry(sbi, segno);
Zhikang Zhang5a60d4c2018-04-09 04:28:41 +08003446#ifdef CONFIG_F2FS_CHECK_FS
3447 if (memcmp(se->cur_valid_map, se->cur_valid_map_mir,
3448 SIT_VBLOCK_MAP_SIZE))
3449 f2fs_bug_on(sbi, 1);
3450#endif
Chao Yu184a5cd2014-09-04 18:13:01 +08003451
3452 /* add discard candidates */
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07003453 if (!(cpc->reason & CP_DISCARD)) {
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -07003454 cpc->trim_start = segno;
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07003455 add_discard_addrs(sbi, cpc, false);
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -07003456 }
Chao Yu184a5cd2014-09-04 18:13:01 +08003457
3458 if (to_journal) {
Chao Yu6b4d6a82018-05-30 00:20:41 +08003459 offset = f2fs_lookup_journal_in_cursum(journal,
Chao Yu184a5cd2014-09-04 18:13:01 +08003460 SIT_JOURNAL, segno, 1);
3461 f2fs_bug_on(sbi, offset < 0);
Chao Yudfc08a12016-02-14 18:50:40 +08003462 segno_in_journal(journal, offset) =
Chao Yu184a5cd2014-09-04 18:13:01 +08003463 cpu_to_le32(segno);
3464 seg_info_to_raw_sit(se,
Chao Yudfc08a12016-02-14 18:50:40 +08003465 &sit_in_journal(journal, offset));
Zhikang Zhang5a60d4c2018-04-09 04:28:41 +08003466 check_block_count(sbi, segno,
3467 &sit_in_journal(journal, offset));
Chao Yu184a5cd2014-09-04 18:13:01 +08003468 } else {
3469 sit_offset = SIT_ENTRY_OFFSET(sit_i, segno);
3470 seg_info_to_raw_sit(se,
3471 &raw_sit->entries[sit_offset]);
Zhikang Zhang5a60d4c2018-04-09 04:28:41 +08003472 check_block_count(sbi, segno,
3473 &raw_sit->entries[sit_offset]);
Chao Yu184a5cd2014-09-04 18:13:01 +08003474 }
3475
3476 __clear_bit(segno, bitmap);
3477 sit_i->dirty_sentries--;
3478 ses->entry_cnt--;
3479 }
3480
Chao Yub7ad7512016-02-19 18:08:46 +08003481 if (to_journal)
3482 up_write(&curseg->journal_rwsem);
3483 else
Chao Yu184a5cd2014-09-04 18:13:01 +08003484 f2fs_put_page(page, 1);
3485
3486 f2fs_bug_on(sbi, ses->entry_cnt);
3487 release_sit_entry_set(ses);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003488 }
Chao Yu184a5cd2014-09-04 18:13:01 +08003489
3490 f2fs_bug_on(sbi, !list_empty(head));
3491 f2fs_bug_on(sbi, sit_i->dirty_sentries);
Chao Yu184a5cd2014-09-04 18:13:01 +08003492out:
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07003493 if (cpc->reason & CP_DISCARD) {
3494 __u64 trim_start = cpc->trim_start;
3495
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -07003496 for (; cpc->trim_start <= cpc->trim_end; cpc->trim_start++)
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07003497 add_discard_addrs(sbi, cpc, false);
3498
3499 cpc->trim_start = trim_start;
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -07003500 }
Chao Yu25d0bec2017-10-30 17:49:53 +08003501 up_write(&sit_i->sentry_lock);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003502
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003503 set_prefree_as_free_segments(sbi);
3504}
3505
3506static int build_sit_info(struct f2fs_sb_info *sbi)
3507{
3508 struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003509 struct sit_info *sit_i;
3510 unsigned int sit_segs, start;
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07003511 char *src_bitmap;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003512 unsigned int bitmap_size;
3513
3514 /* allocate memory for SIT information */
Chao Yue585ca22017-11-30 19:28:17 +08003515 sit_i = f2fs_kzalloc(sbi, sizeof(struct sit_info), GFP_KERNEL);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003516 if (!sit_i)
3517 return -ENOMEM;
3518
3519 SM_I(sbi)->sit_info = sit_i;
3520
Kees Cookf950fa42018-06-12 14:28:35 -07003521 sit_i->sentries =
3522 f2fs_kvzalloc(sbi, array_size(sizeof(struct seg_entry),
3523 MAIN_SEGS(sbi)),
3524 GFP_KERNEL);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003525 if (!sit_i->sentries)
3526 return -ENOMEM;
3527
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07003528 bitmap_size = f2fs_bitmap_size(MAIN_SEGS(sbi));
Chao Yuead52592017-11-30 19:28:18 +08003529 sit_i->dirty_sentries_bitmap = f2fs_kvzalloc(sbi, bitmap_size,
3530 GFP_KERNEL);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003531 if (!sit_i->dirty_sentries_bitmap)
3532 return -ENOMEM;
3533
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07003534 for (start = 0; start < MAIN_SEGS(sbi); start++) {
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003535 sit_i->sentries[start].cur_valid_map
Chao Yue585ca22017-11-30 19:28:17 +08003536 = f2fs_kzalloc(sbi, SIT_VBLOCK_MAP_SIZE, GFP_KERNEL);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003537 sit_i->sentries[start].ckpt_valid_map
Chao Yue585ca22017-11-30 19:28:17 +08003538 = f2fs_kzalloc(sbi, SIT_VBLOCK_MAP_SIZE, GFP_KERNEL);
Jaegeuk Kima66cdd92015-04-30 22:37:50 -07003539 if (!sit_i->sentries[start].cur_valid_map ||
Jaegeuk Kim3e025742016-08-02 10:56:40 -07003540 !sit_i->sentries[start].ckpt_valid_map)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003541 return -ENOMEM;
Jaegeuk Kim3e025742016-08-02 10:56:40 -07003542
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07003543#ifdef CONFIG_F2FS_CHECK_FS
3544 sit_i->sentries[start].cur_valid_map_mir
Chao Yue585ca22017-11-30 19:28:17 +08003545 = f2fs_kzalloc(sbi, SIT_VBLOCK_MAP_SIZE, GFP_KERNEL);
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07003546 if (!sit_i->sentries[start].cur_valid_map_mir)
3547 return -ENOMEM;
3548#endif
3549
Jaegeuk Kim3e025742016-08-02 10:56:40 -07003550 if (f2fs_discard_en(sbi)) {
3551 sit_i->sentries[start].discard_map
Chao Yue585ca22017-11-30 19:28:17 +08003552 = f2fs_kzalloc(sbi, SIT_VBLOCK_MAP_SIZE,
3553 GFP_KERNEL);
Jaegeuk Kim3e025742016-08-02 10:56:40 -07003554 if (!sit_i->sentries[start].discard_map)
3555 return -ENOMEM;
3556 }
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003557 }
3558
Chao Yue585ca22017-11-30 19:28:17 +08003559 sit_i->tmp_map = f2fs_kzalloc(sbi, SIT_VBLOCK_MAP_SIZE, GFP_KERNEL);
Jaegeuk Kim60a3b782015-02-10 16:44:29 -08003560 if (!sit_i->tmp_map)
3561 return -ENOMEM;
3562
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003563 if (sbi->segs_per_sec > 1) {
Kees Cookf950fa42018-06-12 14:28:35 -07003564 sit_i->sec_entries =
3565 f2fs_kvzalloc(sbi, array_size(sizeof(struct sec_entry),
3566 MAIN_SECS(sbi)),
3567 GFP_KERNEL);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003568 if (!sit_i->sec_entries)
3569 return -ENOMEM;
3570 }
3571
3572 /* get information related with SIT */
3573 sit_segs = le32_to_cpu(raw_super->segment_count_sit) >> 1;
3574
3575 /* setup SIT bitmap from ckeckpoint pack */
3576 bitmap_size = __bitmap_size(sbi, SIT_BITMAP);
3577 src_bitmap = __bitmap_ptr(sbi, SIT_BITMAP);
3578
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07003579 sit_i->sit_bitmap = kmemdup(src_bitmap, bitmap_size, GFP_KERNEL);
3580 if (!sit_i->sit_bitmap)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003581 return -ENOMEM;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003582
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07003583#ifdef CONFIG_F2FS_CHECK_FS
3584 sit_i->sit_bitmap_mir = kmemdup(src_bitmap, bitmap_size, GFP_KERNEL);
3585 if (!sit_i->sit_bitmap_mir)
3586 return -ENOMEM;
3587#endif
3588
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003589 /* init SIT information */
3590 sit_i->s_ops = &default_salloc_ops;
3591
3592 sit_i->sit_base_addr = le32_to_cpu(raw_super->sit_blkaddr);
3593 sit_i->sit_blocks = sit_segs << sbi->log_blocks_per_seg;
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07003594 sit_i->written_valid_blocks = 0;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003595 sit_i->bitmap_size = bitmap_size;
3596 sit_i->dirty_sentries = 0;
3597 sit_i->sents_per_block = SIT_ENTRY_PER_BLOCK;
3598 sit_i->elapsed_time = le64_to_cpu(sbi->ckpt->elapsed_time);
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07003599 sit_i->mounted_time = ktime_get_real_seconds();
Chao Yu25d0bec2017-10-30 17:49:53 +08003600 init_rwsem(&sit_i->sentry_lock);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003601 return 0;
3602}
3603
3604static int build_free_segmap(struct f2fs_sb_info *sbi)
3605{
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003606 struct free_segmap_info *free_i;
3607 unsigned int bitmap_size, sec_bitmap_size;
3608
3609 /* allocate memory for free segmap information */
Chao Yue585ca22017-11-30 19:28:17 +08003610 free_i = f2fs_kzalloc(sbi, sizeof(struct free_segmap_info), GFP_KERNEL);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003611 if (!free_i)
3612 return -ENOMEM;
3613
3614 SM_I(sbi)->free_info = free_i;
3615
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07003616 bitmap_size = f2fs_bitmap_size(MAIN_SEGS(sbi));
Chao Yuead52592017-11-30 19:28:18 +08003617 free_i->free_segmap = f2fs_kvmalloc(sbi, bitmap_size, GFP_KERNEL);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003618 if (!free_i->free_segmap)
3619 return -ENOMEM;
3620
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07003621 sec_bitmap_size = f2fs_bitmap_size(MAIN_SECS(sbi));
Chao Yuead52592017-11-30 19:28:18 +08003622 free_i->free_secmap = f2fs_kvmalloc(sbi, sec_bitmap_size, GFP_KERNEL);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003623 if (!free_i->free_secmap)
3624 return -ENOMEM;
3625
3626 /* set all segments as dirty temporarily */
3627 memset(free_i->free_segmap, 0xff, bitmap_size);
3628 memset(free_i->free_secmap, 0xff, sec_bitmap_size);
3629
3630 /* init free segmap information */
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07003631 free_i->start_segno = GET_SEGNO_FROM_SEG0(sbi, MAIN_BLKADDR(sbi));
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003632 free_i->free_segments = 0;
3633 free_i->free_sections = 0;
Chao Yu1a118cc2015-02-11 18:20:38 +08003634 spin_lock_init(&free_i->segmap_lock);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003635 return 0;
3636}
3637
3638static int build_curseg(struct f2fs_sb_info *sbi)
3639{
Namjae Jeon1042d602012-12-01 10:56:13 +09003640 struct curseg_info *array;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003641 int i;
3642
Kees Cook61f48642018-06-12 14:28:23 -07003643 array = f2fs_kzalloc(sbi, array_size(NR_CURSEG_TYPE, sizeof(*array)),
3644 GFP_KERNEL);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003645 if (!array)
3646 return -ENOMEM;
3647
3648 SM_I(sbi)->curseg_array = array;
3649
3650 for (i = 0; i < NR_CURSEG_TYPE; i++) {
3651 mutex_init(&array[i].curseg_mutex);
Chao Yue585ca22017-11-30 19:28:17 +08003652 array[i].sum_blk = f2fs_kzalloc(sbi, PAGE_SIZE, GFP_KERNEL);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003653 if (!array[i].sum_blk)
3654 return -ENOMEM;
Chao Yub7ad7512016-02-19 18:08:46 +08003655 init_rwsem(&array[i].journal_rwsem);
Chao Yue585ca22017-11-30 19:28:17 +08003656 array[i].journal = f2fs_kzalloc(sbi,
3657 sizeof(struct f2fs_journal), GFP_KERNEL);
Chao Yub7ad7512016-02-19 18:08:46 +08003658 if (!array[i].journal)
3659 return -ENOMEM;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003660 array[i].segno = NULL_SEGNO;
3661 array[i].next_blkoff = 0;
3662 }
3663 return restore_curseg_summaries(sbi);
3664}
3665
Jaegeuk Kim2648e732017-12-19 19:16:34 -08003666static int build_sit_entries(struct f2fs_sb_info *sbi)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003667{
3668 struct sit_info *sit_i = SIT_I(sbi);
3669 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA);
Chao Yub7ad7512016-02-19 18:08:46 +08003670 struct f2fs_journal *journal = curseg->journal;
Yunlei He9c094042016-09-24 12:29:18 +08003671 struct seg_entry *se;
3672 struct f2fs_sit_entry sit;
Chao Yu74de5932013-11-22 09:09:59 +08003673 int sit_blk_cnt = SIT_BLK_CNT(sbi);
3674 unsigned int i, start, end;
3675 unsigned int readed, start_blk = 0;
Jaegeuk Kim2648e732017-12-19 19:16:34 -08003676 int err = 0;
Jaegeuk Kim1c7d5f02018-04-24 21:34:05 -06003677 block_t total_node_blocks = 0;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003678
Chao Yu74de5932013-11-22 09:09:59 +08003679 do {
Chao Yu6b4d6a82018-05-30 00:20:41 +08003680 readed = f2fs_ra_meta_pages(sbi, start_blk, BIO_MAX_PAGES,
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07003681 META_SIT, true);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003682
Chao Yu74de5932013-11-22 09:09:59 +08003683 start = start_blk * sit_i->sents_per_block;
3684 end = (start_blk + readed) * sit_i->sents_per_block;
3685
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07003686 for (; start < end && start < MAIN_SEGS(sbi); start++) {
Chao Yu74de5932013-11-22 09:09:59 +08003687 struct f2fs_sit_block *sit_blk;
Chao Yu74de5932013-11-22 09:09:59 +08003688 struct page *page;
3689
Yunlei He9c094042016-09-24 12:29:18 +08003690 se = &sit_i->sentries[start];
Chao Yu74de5932013-11-22 09:09:59 +08003691 page = get_current_sit_page(sbi, start);
3692 sit_blk = (struct f2fs_sit_block *)page_address(page);
3693 sit = sit_blk->entries[SIT_ENTRY_OFFSET(sit_i, start)];
3694 f2fs_put_page(page, 1);
Chao Yud600af232016-08-19 23:13:47 +08003695
Jaegeuk Kim2648e732017-12-19 19:16:34 -08003696 err = check_block_count(sbi, start, &sit);
3697 if (err)
3698 return err;
Chao Yu74de5932013-11-22 09:09:59 +08003699 seg_info_from_raw_sit(se, &sit);
Jaegeuk Kim1c7d5f02018-04-24 21:34:05 -06003700 if (IS_NODESEG(se->type))
3701 total_node_blocks += se->valid_blocks;
Jaegeuk Kima66cdd92015-04-30 22:37:50 -07003702
3703 /* build discard map only one time */
Jaegeuk Kim3e025742016-08-02 10:56:40 -07003704 if (f2fs_discard_en(sbi)) {
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07003705 if (is_set_ckpt_flags(sbi, CP_TRIMMED_FLAG)) {
3706 memset(se->discard_map, 0xff,
3707 SIT_VBLOCK_MAP_SIZE);
3708 } else {
3709 memcpy(se->discard_map,
3710 se->cur_valid_map,
3711 SIT_VBLOCK_MAP_SIZE);
3712 sbi->discard_blks +=
3713 sbi->blocks_per_seg -
3714 se->valid_blocks;
3715 }
Jaegeuk Kim3e025742016-08-02 10:56:40 -07003716 }
Jaegeuk Kima66cdd92015-04-30 22:37:50 -07003717
Chao Yud600af232016-08-19 23:13:47 +08003718 if (sbi->segs_per_sec > 1)
3719 get_sec_entry(sbi, start)->valid_blocks +=
3720 se->valid_blocks;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003721 }
Chao Yu74de5932013-11-22 09:09:59 +08003722 start_blk += readed;
3723 } while (start_blk < sit_blk_cnt);
Chao Yud600af232016-08-19 23:13:47 +08003724
3725 down_read(&curseg->journal_rwsem);
3726 for (i = 0; i < sits_in_cursum(journal); i++) {
Chao Yud600af232016-08-19 23:13:47 +08003727 unsigned int old_valid_blocks;
3728
3729 start = le32_to_cpu(segno_in_journal(journal, i));
Jaegeuk Kim0f0b18a2018-04-24 15:44:16 -06003730 if (start >= MAIN_SEGS(sbi)) {
3731 f2fs_msg(sbi->sb, KERN_ERR,
3732 "Wrong journal entry on segno %u",
3733 start);
3734 set_sbi_flag(sbi, SBI_NEED_FSCK);
3735 err = -EINVAL;
3736 break;
3737 }
3738
Chao Yud600af232016-08-19 23:13:47 +08003739 se = &sit_i->sentries[start];
3740 sit = sit_in_journal(journal, i);
3741
3742 old_valid_blocks = se->valid_blocks;
Jaegeuk Kim1c7d5f02018-04-24 21:34:05 -06003743 if (IS_NODESEG(se->type))
3744 total_node_blocks -= old_valid_blocks;
Chao Yud600af232016-08-19 23:13:47 +08003745
Jaegeuk Kim2648e732017-12-19 19:16:34 -08003746 err = check_block_count(sbi, start, &sit);
3747 if (err)
3748 break;
Chao Yud600af232016-08-19 23:13:47 +08003749 seg_info_from_raw_sit(se, &sit);
Jaegeuk Kim1c7d5f02018-04-24 21:34:05 -06003750 if (IS_NODESEG(se->type))
3751 total_node_blocks += se->valid_blocks;
Chao Yud600af232016-08-19 23:13:47 +08003752
3753 if (f2fs_discard_en(sbi)) {
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07003754 if (is_set_ckpt_flags(sbi, CP_TRIMMED_FLAG)) {
3755 memset(se->discard_map, 0xff,
3756 SIT_VBLOCK_MAP_SIZE);
3757 } else {
3758 memcpy(se->discard_map, se->cur_valid_map,
3759 SIT_VBLOCK_MAP_SIZE);
Chao Yu54f43782018-04-25 19:38:17 +08003760 sbi->discard_blks += old_valid_blocks;
3761 sbi->discard_blks -= se->valid_blocks;
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07003762 }
Chao Yud600af232016-08-19 23:13:47 +08003763 }
3764
Chao Yu54f43782018-04-25 19:38:17 +08003765 if (sbi->segs_per_sec > 1) {
Chao Yud600af232016-08-19 23:13:47 +08003766 get_sec_entry(sbi, start)->valid_blocks +=
Chao Yu54f43782018-04-25 19:38:17 +08003767 se->valid_blocks;
3768 get_sec_entry(sbi, start)->valid_blocks -=
3769 old_valid_blocks;
3770 }
Chao Yud600af232016-08-19 23:13:47 +08003771 }
3772 up_read(&curseg->journal_rwsem);
Jaegeuk Kim1c7d5f02018-04-24 21:34:05 -06003773
3774 if (!err && total_node_blocks != valid_node_count(sbi)) {
3775 f2fs_msg(sbi->sb, KERN_ERR,
3776 "SIT is corrupted node# %u vs %u",
3777 total_node_blocks, valid_node_count(sbi));
3778 set_sbi_flag(sbi, SBI_NEED_FSCK);
3779 err = -EINVAL;
3780 }
3781
Jaegeuk Kim2648e732017-12-19 19:16:34 -08003782 return err;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003783}
3784
3785static void init_free_segmap(struct f2fs_sb_info *sbi)
3786{
3787 unsigned int start;
3788 int type;
3789
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07003790 for (start = 0; start < MAIN_SEGS(sbi); start++) {
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003791 struct seg_entry *sentry = get_seg_entry(sbi, start);
3792 if (!sentry->valid_blocks)
3793 __set_free(sbi, start);
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07003794 else
3795 SIT_I(sbi)->written_valid_blocks +=
3796 sentry->valid_blocks;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003797 }
3798
3799 /* set use the current segments */
3800 for (type = CURSEG_HOT_DATA; type <= CURSEG_COLD_NODE; type++) {
3801 struct curseg_info *curseg_t = CURSEG_I(sbi, type);
3802 __set_test_and_inuse(sbi, curseg_t->segno);
3803 }
3804}
3805
3806static void init_dirty_segmap(struct f2fs_sb_info *sbi)
3807{
3808 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
3809 struct free_segmap_info *free_i = FREE_I(sbi);
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07003810 unsigned int segno = 0, offset = 0;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003811 unsigned short valid_blocks;
3812
Namjae Jeon8736fbf2013-06-16 09:49:11 +09003813 while (1) {
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003814 /* find dirty segment based on free segmap */
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07003815 segno = find_next_inuse(free_i, MAIN_SEGS(sbi), offset);
3816 if (segno >= MAIN_SEGS(sbi))
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003817 break;
3818 offset = segno + 1;
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07003819 valid_blocks = get_valid_blocks(sbi, segno, false);
Jaegeuk Kimec325b52014-09-02 16:24:11 -07003820 if (valid_blocks == sbi->blocks_per_seg || !valid_blocks)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003821 continue;
Jaegeuk Kimec325b52014-09-02 16:24:11 -07003822 if (valid_blocks > sbi->blocks_per_seg) {
3823 f2fs_bug_on(sbi, 1);
3824 continue;
3825 }
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003826 mutex_lock(&dirty_i->seglist_lock);
3827 __locate_dirty_segment(sbi, segno, DIRTY);
3828 mutex_unlock(&dirty_i->seglist_lock);
3829 }
3830}
3831
Jaegeuk Kim5ec4e492013-03-31 13:26:03 +09003832static int init_victim_secmap(struct f2fs_sb_info *sbi)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003833{
3834 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07003835 unsigned int bitmap_size = f2fs_bitmap_size(MAIN_SECS(sbi));
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003836
Chao Yuead52592017-11-30 19:28:18 +08003837 dirty_i->victim_secmap = f2fs_kvzalloc(sbi, bitmap_size, GFP_KERNEL);
Jaegeuk Kim5ec4e492013-03-31 13:26:03 +09003838 if (!dirty_i->victim_secmap)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003839 return -ENOMEM;
3840 return 0;
3841}
3842
3843static int build_dirty_segmap(struct f2fs_sb_info *sbi)
3844{
3845 struct dirty_seglist_info *dirty_i;
3846 unsigned int bitmap_size, i;
3847
3848 /* allocate memory for dirty segments list information */
Chao Yue585ca22017-11-30 19:28:17 +08003849 dirty_i = f2fs_kzalloc(sbi, sizeof(struct dirty_seglist_info),
3850 GFP_KERNEL);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003851 if (!dirty_i)
3852 return -ENOMEM;
3853
3854 SM_I(sbi)->dirty_info = dirty_i;
3855 mutex_init(&dirty_i->seglist_lock);
3856
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07003857 bitmap_size = f2fs_bitmap_size(MAIN_SEGS(sbi));
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003858
3859 for (i = 0; i < NR_DIRTY_TYPE; i++) {
Chao Yuead52592017-11-30 19:28:18 +08003860 dirty_i->dirty_segmap[i] = f2fs_kvzalloc(sbi, bitmap_size,
3861 GFP_KERNEL);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003862 if (!dirty_i->dirty_segmap[i])
3863 return -ENOMEM;
3864 }
3865
3866 init_dirty_segmap(sbi);
Jaegeuk Kim5ec4e492013-03-31 13:26:03 +09003867 return init_victim_secmap(sbi);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003868}
3869
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +09003870/*
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003871 * Update min, max modified time for cost-benefit GC algorithm
3872 */
3873static void init_min_max_mtime(struct f2fs_sb_info *sbi)
3874{
3875 struct sit_info *sit_i = SIT_I(sbi);
3876 unsigned int segno;
3877
Chao Yu25d0bec2017-10-30 17:49:53 +08003878 down_write(&sit_i->sentry_lock);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003879
Chao Yu20893172018-05-15 18:59:55 +08003880 sit_i->min_mtime = ULLONG_MAX;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003881
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07003882 for (segno = 0; segno < MAIN_SEGS(sbi); segno += sbi->segs_per_sec) {
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003883 unsigned int i;
3884 unsigned long long mtime = 0;
3885
3886 for (i = 0; i < sbi->segs_per_sec; i++)
3887 mtime += get_seg_entry(sbi, segno + i)->mtime;
3888
3889 mtime = div_u64(mtime, sbi->segs_per_sec);
3890
3891 if (sit_i->min_mtime > mtime)
3892 sit_i->min_mtime = mtime;
3893 }
Chao Yuaccb4062018-06-04 23:20:17 +08003894 sit_i->max_mtime = get_mtime(sbi, false);
Chao Yu25d0bec2017-10-30 17:49:53 +08003895 up_write(&sit_i->sentry_lock);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003896}
3897
Chao Yu6b4d6a82018-05-30 00:20:41 +08003898int f2fs_build_segment_manager(struct f2fs_sb_info *sbi)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003899{
3900 struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
3901 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
Namjae Jeon1042d602012-12-01 10:56:13 +09003902 struct f2fs_sm_info *sm_info;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003903 int err;
3904
Chao Yue585ca22017-11-30 19:28:17 +08003905 sm_info = f2fs_kzalloc(sbi, sizeof(struct f2fs_sm_info), GFP_KERNEL);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003906 if (!sm_info)
3907 return -ENOMEM;
3908
3909 /* init sm info */
3910 sbi->sm_info = sm_info;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003911 sm_info->seg0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr);
3912 sm_info->main_blkaddr = le32_to_cpu(raw_super->main_blkaddr);
3913 sm_info->segment_count = le32_to_cpu(raw_super->segment_count);
3914 sm_info->reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
3915 sm_info->ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
3916 sm_info->main_segments = le32_to_cpu(raw_super->segment_count_main);
3917 sm_info->ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
Jaegeuk Kim58c41032014-03-19 14:17:21 +09003918 sm_info->rec_prefree_segments = sm_info->main_segments *
3919 DEF_RECLAIM_PREFREE_SEGMENTS / 100;
Jaegeuk Kim44a83492016-07-13 18:23:35 -07003920 if (sm_info->rec_prefree_segments > DEF_MAX_RECLAIM_PREFREE_SEGMENTS)
3921 sm_info->rec_prefree_segments = DEF_MAX_RECLAIM_PREFREE_SEGMENTS;
3922
Jaegeuk Kim52763a42016-06-13 09:47:48 -07003923 if (!test_opt(sbi, LFS))
3924 sm_info->ipu_policy = 1 << F2FS_IPU_FSYNC;
Jaegeuk Kim216fbd62013-11-07 13:13:42 +09003925 sm_info->min_ipu_util = DEF_MIN_IPU_UTIL;
Jaegeuk Kimc1ce1b02014-09-10 16:53:02 -07003926 sm_info->min_fsync_blocks = DEF_MIN_FSYNC_BLOCKS;
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07003927 sm_info->min_hot_blocks = DEF_MIN_HOT_BLOCKS;
Chao Yub9f73872017-10-28 16:52:33 +08003928 sm_info->min_ssr_sections = reserved_sections(sbi);
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +09003929
Chao Yu184a5cd2014-09-04 18:13:01 +08003930 INIT_LIST_HEAD(&sm_info->sit_entry_set);
3931
Chao Yu7f41aab2017-11-02 20:41:03 +08003932 init_rwsem(&sm_info->curseg_lock);
3933
Yunlei Head9baf42017-06-01 16:43:51 +08003934 if (!f2fs_readonly(sbi->sb)) {
Chao Yu6b4d6a82018-05-30 00:20:41 +08003935 err = f2fs_create_flush_cmd_control(sbi);
Gu Zheng2163d192014-04-27 14:21:33 +08003936 if (err)
Gu Zhenga688b9d9e2014-04-27 14:21:21 +08003937 return err;
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +09003938 }
3939
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07003940 err = create_discard_cmd_control(sbi);
3941 if (err)
3942 return err;
3943
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003944 err = build_sit_info(sbi);
3945 if (err)
3946 return err;
3947 err = build_free_segmap(sbi);
3948 if (err)
3949 return err;
3950 err = build_curseg(sbi);
3951 if (err)
3952 return err;
3953
3954 /* reinit free segmap based on SIT */
Jaegeuk Kim2648e732017-12-19 19:16:34 -08003955 err = build_sit_entries(sbi);
3956 if (err)
3957 return err;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003958
3959 init_free_segmap(sbi);
3960 err = build_dirty_segmap(sbi);
3961 if (err)
3962 return err;
3963
3964 init_min_max_mtime(sbi);
3965 return 0;
3966}
3967
3968static void discard_dirty_segmap(struct f2fs_sb_info *sbi,
3969 enum dirty_type dirty_type)
3970{
3971 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
3972
3973 mutex_lock(&dirty_i->seglist_lock);
Jaegeuk Kim39307a82015-09-22 13:50:47 -07003974 kvfree(dirty_i->dirty_segmap[dirty_type]);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003975 dirty_i->nr_dirty[dirty_type] = 0;
3976 mutex_unlock(&dirty_i->seglist_lock);
3977}
3978
Jaegeuk Kim5ec4e492013-03-31 13:26:03 +09003979static void destroy_victim_secmap(struct f2fs_sb_info *sbi)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003980{
3981 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
Jaegeuk Kim39307a82015-09-22 13:50:47 -07003982 kvfree(dirty_i->victim_secmap);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003983}
3984
3985static void destroy_dirty_segmap(struct f2fs_sb_info *sbi)
3986{
3987 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
3988 int i;
3989
3990 if (!dirty_i)
3991 return;
3992
3993 /* discard pre-free/dirty segments list */
3994 for (i = 0; i < NR_DIRTY_TYPE; i++)
3995 discard_dirty_segmap(sbi, i);
3996
Jaegeuk Kim5ec4e492013-03-31 13:26:03 +09003997 destroy_victim_secmap(sbi);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09003998 SM_I(sbi)->dirty_info = NULL;
3999 kfree(dirty_i);
4000}
4001
4002static void destroy_curseg(struct f2fs_sb_info *sbi)
4003{
4004 struct curseg_info *array = SM_I(sbi)->curseg_array;
4005 int i;
4006
4007 if (!array)
4008 return;
4009 SM_I(sbi)->curseg_array = NULL;
Chao Yub7ad7512016-02-19 18:08:46 +08004010 for (i = 0; i < NR_CURSEG_TYPE; i++) {
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09004011 kfree(array[i].sum_blk);
Chao Yub7ad7512016-02-19 18:08:46 +08004012 kfree(array[i].journal);
4013 }
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09004014 kfree(array);
4015}
4016
4017static void destroy_free_segmap(struct f2fs_sb_info *sbi)
4018{
4019 struct free_segmap_info *free_i = SM_I(sbi)->free_info;
4020 if (!free_i)
4021 return;
4022 SM_I(sbi)->free_info = NULL;
Jaegeuk Kim39307a82015-09-22 13:50:47 -07004023 kvfree(free_i->free_segmap);
4024 kvfree(free_i->free_secmap);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09004025 kfree(free_i);
4026}
4027
4028static void destroy_sit_info(struct f2fs_sb_info *sbi)
4029{
4030 struct sit_info *sit_i = SIT_I(sbi);
4031 unsigned int start;
4032
4033 if (!sit_i)
4034 return;
4035
4036 if (sit_i->sentries) {
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07004037 for (start = 0; start < MAIN_SEGS(sbi); start++) {
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09004038 kfree(sit_i->sentries[start].cur_valid_map);
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07004039#ifdef CONFIG_F2FS_CHECK_FS
4040 kfree(sit_i->sentries[start].cur_valid_map_mir);
4041#endif
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09004042 kfree(sit_i->sentries[start].ckpt_valid_map);
Jaegeuk Kima66cdd92015-04-30 22:37:50 -07004043 kfree(sit_i->sentries[start].discard_map);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09004044 }
4045 }
Jaegeuk Kim60a3b782015-02-10 16:44:29 -08004046 kfree(sit_i->tmp_map);
4047
Jaegeuk Kim39307a82015-09-22 13:50:47 -07004048 kvfree(sit_i->sentries);
4049 kvfree(sit_i->sec_entries);
4050 kvfree(sit_i->dirty_sentries_bitmap);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09004051
4052 SM_I(sbi)->sit_info = NULL;
4053 kfree(sit_i->sit_bitmap);
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07004054#ifdef CONFIG_F2FS_CHECK_FS
4055 kfree(sit_i->sit_bitmap_mir);
4056#endif
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09004057 kfree(sit_i);
4058}
4059
Chao Yu6b4d6a82018-05-30 00:20:41 +08004060void f2fs_destroy_segment_manager(struct f2fs_sb_info *sbi)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09004061{
4062 struct f2fs_sm_info *sm_info = SM_I(sbi);
Gu Zhenga688b9d9e2014-04-27 14:21:21 +08004063
Chao Yu3b03f722013-11-06 09:12:04 +08004064 if (!sm_info)
4065 return;
Chao Yu6b4d6a82018-05-30 00:20:41 +08004066 f2fs_destroy_flush_cmd_control(sbi, true);
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07004067 destroy_discard_cmd_control(sbi);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09004068 destroy_dirty_segmap(sbi);
4069 destroy_curseg(sbi);
4070 destroy_free_segmap(sbi);
4071 destroy_sit_info(sbi);
4072 sbi->sm_info = NULL;
4073 kfree(sm_info);
4074}
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +09004075
Chao Yu6b4d6a82018-05-30 00:20:41 +08004076int __init f2fs_create_segment_manager_caches(void)
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +09004077{
4078 discard_entry_slab = f2fs_kmem_cache_create("discard_entry",
Gu Zhenge8512d22014-03-07 18:43:28 +08004079 sizeof(struct discard_entry));
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +09004080 if (!discard_entry_slab)
Chao Yu184a5cd2014-09-04 18:13:01 +08004081 goto fail;
4082
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07004083 discard_cmd_slab = f2fs_kmem_cache_create("discard_cmd",
4084 sizeof(struct discard_cmd));
4085 if (!discard_cmd_slab)
Chao Yu6ab2a302016-09-05 12:28:26 +08004086 goto destroy_discard_entry;
Chao Yu275b66b2016-08-29 23:58:34 +08004087
Chao Yu184a5cd2014-09-04 18:13:01 +08004088 sit_entry_set_slab = f2fs_kmem_cache_create("sit_entry_set",
Changman Leec9ee0082014-11-21 15:42:07 +09004089 sizeof(struct sit_entry_set));
Chao Yu184a5cd2014-09-04 18:13:01 +08004090 if (!sit_entry_set_slab)
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07004091 goto destroy_discard_cmd;
Jaegeuk Kim88b88a62014-10-06 17:39:50 -07004092
4093 inmem_entry_slab = f2fs_kmem_cache_create("inmem_page_entry",
4094 sizeof(struct inmem_pages));
4095 if (!inmem_entry_slab)
4096 goto destroy_sit_entry_set;
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +09004097 return 0;
Chao Yu184a5cd2014-09-04 18:13:01 +08004098
Jaegeuk Kim88b88a62014-10-06 17:39:50 -07004099destroy_sit_entry_set:
4100 kmem_cache_destroy(sit_entry_set_slab);
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07004101destroy_discard_cmd:
4102 kmem_cache_destroy(discard_cmd_slab);
Chao Yu6ab2a302016-09-05 12:28:26 +08004103destroy_discard_entry:
Chao Yu184a5cd2014-09-04 18:13:01 +08004104 kmem_cache_destroy(discard_entry_slab);
4105fail:
4106 return -ENOMEM;
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +09004107}
4108
Chao Yu6b4d6a82018-05-30 00:20:41 +08004109void f2fs_destroy_segment_manager_caches(void)
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +09004110{
Chao Yu184a5cd2014-09-04 18:13:01 +08004111 kmem_cache_destroy(sit_entry_set_slab);
Jaegeuk Kime6b120d2017-07-10 12:55:09 -07004112 kmem_cache_destroy(discard_cmd_slab);
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +09004113 kmem_cache_destroy(discard_entry_slab);
Jaegeuk Kim88b88a62014-10-06 17:39:50 -07004114 kmem_cache_destroy(inmem_entry_slab);
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +09004115}