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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 Kim351df4b2012-11-02 17:09:16 +090019
20#include "f2fs.h"
21#include "segment.h"
22#include "node.h"
Jaegeuk Kim9e4ded32014-12-17 19:58:58 -080023#include "trace.h"
Namjae Jeon6ec178d2013-04-23 17:51:43 +090024#include <trace/events/f2fs.h>
Jaegeuk Kim351df4b2012-11-02 17:09:16 +090025
Changman Lee9a7f1432013-11-15 10:42:51 +090026#define __reverse_ffz(x) __reverse_ffs(~(x))
27
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +090028static struct kmem_cache *discard_entry_slab;
Chao Yu184a5cd2014-09-04 18:13:01 +080029static struct kmem_cache *sit_entry_set_slab;
Jaegeuk Kim88b88a62014-10-06 17:39:50 -070030static struct kmem_cache *inmem_entry_slab;
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +090031
Jaegeuk Kimf96999c2015-10-20 15:17:19 -070032static unsigned long __reverse_ulong(unsigned char *str)
33{
34 unsigned long tmp = 0;
35 int shift = 24, idx = 0;
36
37#if BITS_PER_LONG == 64
38 shift = 56;
39#endif
40 while (shift >= 0) {
41 tmp |= (unsigned long)str[idx++] << shift;
42 shift -= BITS_PER_BYTE;
43 }
44 return tmp;
45}
46
Changman Lee9a7f1432013-11-15 10:42:51 +090047/*
48 * __reverse_ffs is copied from include/asm-generic/bitops/__ffs.h since
49 * MSB and LSB are reversed in a byte by f2fs_set_bit.
50 */
51static inline unsigned long __reverse_ffs(unsigned long word)
52{
53 int num = 0;
54
55#if BITS_PER_LONG == 64
Jaegeuk Kimf96999c2015-10-20 15:17:19 -070056 if ((word & 0xffffffff00000000UL) == 0)
Changman Lee9a7f1432013-11-15 10:42:51 +090057 num += 32;
Jaegeuk Kimf96999c2015-10-20 15:17:19 -070058 else
Changman Lee9a7f1432013-11-15 10:42:51 +090059 word >>= 32;
Changman Lee9a7f1432013-11-15 10:42:51 +090060#endif
Jaegeuk Kimf96999c2015-10-20 15:17:19 -070061 if ((word & 0xffff0000) == 0)
Changman Lee9a7f1432013-11-15 10:42:51 +090062 num += 16;
Jaegeuk Kimf96999c2015-10-20 15:17:19 -070063 else
Changman Lee9a7f1432013-11-15 10:42:51 +090064 word >>= 16;
Jaegeuk Kimf96999c2015-10-20 15:17:19 -070065
66 if ((word & 0xff00) == 0)
Changman Lee9a7f1432013-11-15 10:42:51 +090067 num += 8;
Jaegeuk Kimf96999c2015-10-20 15:17:19 -070068 else
Changman Lee9a7f1432013-11-15 10:42:51 +090069 word >>= 8;
Jaegeuk Kimf96999c2015-10-20 15:17:19 -070070
Changman Lee9a7f1432013-11-15 10:42:51 +090071 if ((word & 0xf0) == 0)
72 num += 4;
73 else
74 word >>= 4;
Jaegeuk Kimf96999c2015-10-20 15:17:19 -070075
Changman Lee9a7f1432013-11-15 10:42:51 +090076 if ((word & 0xc) == 0)
77 num += 2;
78 else
79 word >>= 2;
Jaegeuk Kimf96999c2015-10-20 15:17:19 -070080
Changman Lee9a7f1432013-11-15 10:42:51 +090081 if ((word & 0x2) == 0)
82 num += 1;
83 return num;
84}
85
86/*
arter97e1c42042014-08-06 23:22:50 +090087 * __find_rev_next(_zero)_bit is copied from lib/find_next_bit.c because
Changman Lee9a7f1432013-11-15 10:42:51 +090088 * f2fs_set_bit makes MSB and LSB reversed in a byte.
Fan Li692223d2015-11-12 08:43:04 +080089 * @size must be integral times of unsigned long.
Changman Lee9a7f1432013-11-15 10:42:51 +090090 * Example:
Jaegeuk Kimf96999c2015-10-20 15:17:19 -070091 * MSB <--> LSB
92 * f2fs_set_bit(0, bitmap) => 1000 0000
93 * f2fs_set_bit(7, bitmap) => 0000 0001
Changman Lee9a7f1432013-11-15 10:42:51 +090094 */
95static unsigned long __find_rev_next_bit(const unsigned long *addr,
96 unsigned long size, unsigned long offset)
97{
98 const unsigned long *p = addr + BIT_WORD(offset);
Fan Li692223d2015-11-12 08:43:04 +080099 unsigned long result = size;
Changman Lee9a7f1432013-11-15 10:42:51 +0900100 unsigned long tmp;
Changman Lee9a7f1432013-11-15 10:42:51 +0900101
102 if (offset >= size)
103 return size;
104
Fan Li692223d2015-11-12 08:43:04 +0800105 size -= (offset & ~(BITS_PER_LONG - 1));
Changman Lee9a7f1432013-11-15 10:42:51 +0900106 offset %= BITS_PER_LONG;
Changman Lee9a7f1432013-11-15 10:42:51 +0900107
Fan Li692223d2015-11-12 08:43:04 +0800108 while (1) {
109 if (*p == 0)
110 goto pass;
Jaegeuk Kimf96999c2015-10-20 15:17:19 -0700111
Jaegeuk Kimf96999c2015-10-20 15:17:19 -0700112 tmp = __reverse_ulong((unsigned char *)p);
Fan Li692223d2015-11-12 08:43:04 +0800113
114 tmp &= ~0UL >> offset;
115 if (size < BITS_PER_LONG)
116 tmp &= (~0UL << (BITS_PER_LONG - size));
Changman Lee9a7f1432013-11-15 10:42:51 +0900117 if (tmp)
Fan Li692223d2015-11-12 08:43:04 +0800118 goto found;
119pass:
120 if (size <= BITS_PER_LONG)
121 break;
Changman Lee9a7f1432013-11-15 10:42:51 +0900122 size -= BITS_PER_LONG;
Fan Li692223d2015-11-12 08:43:04 +0800123 offset = 0;
Jaegeuk Kimf96999c2015-10-20 15:17:19 -0700124 p++;
Changman Lee9a7f1432013-11-15 10:42:51 +0900125 }
Fan Li692223d2015-11-12 08:43:04 +0800126 return result;
127found:
128 return result - size + __reverse_ffs(tmp);
Changman Lee9a7f1432013-11-15 10:42:51 +0900129}
130
131static unsigned long __find_rev_next_zero_bit(const unsigned long *addr,
132 unsigned long size, unsigned long offset)
133{
134 const unsigned long *p = addr + BIT_WORD(offset);
Jaegeuk Kim80609442015-12-04 16:51:13 -0800135 unsigned long result = size;
Changman Lee9a7f1432013-11-15 10:42:51 +0900136 unsigned long tmp;
Changman Lee9a7f1432013-11-15 10:42:51 +0900137
138 if (offset >= size)
139 return size;
140
Jaegeuk Kim80609442015-12-04 16:51:13 -0800141 size -= (offset & ~(BITS_PER_LONG - 1));
Changman Lee9a7f1432013-11-15 10:42:51 +0900142 offset %= BITS_PER_LONG;
Changman Lee9a7f1432013-11-15 10:42:51 +0900143
Jaegeuk Kim80609442015-12-04 16:51:13 -0800144 while (1) {
145 if (*p == ~0UL)
146 goto pass;
Jaegeuk Kimf96999c2015-10-20 15:17:19 -0700147
Jaegeuk Kimf96999c2015-10-20 15:17:19 -0700148 tmp = __reverse_ulong((unsigned char *)p);
Jaegeuk Kim80609442015-12-04 16:51:13 -0800149
150 if (offset)
151 tmp |= ~0UL << (BITS_PER_LONG - offset);
152 if (size < BITS_PER_LONG)
153 tmp |= ~0UL >> size;
Jaegeuk Kimf96999c2015-10-20 15:17:19 -0700154 if (tmp != ~0UL)
Jaegeuk Kim80609442015-12-04 16:51:13 -0800155 goto found;
156pass:
157 if (size <= BITS_PER_LONG)
158 break;
Changman Lee9a7f1432013-11-15 10:42:51 +0900159 size -= BITS_PER_LONG;
Jaegeuk Kim80609442015-12-04 16:51:13 -0800160 offset = 0;
Jaegeuk Kimf96999c2015-10-20 15:17:19 -0700161 p++;
Changman Lee9a7f1432013-11-15 10:42:51 +0900162 }
Jaegeuk Kim80609442015-12-04 16:51:13 -0800163 return result;
164found:
165 return result - size + __reverse_ffz(tmp);
Changman Lee9a7f1432013-11-15 10:42:51 +0900166}
167
Jaegeuk Kim88b88a62014-10-06 17:39:50 -0700168void register_inmem_page(struct inode *inode, struct page *page)
169{
170 struct f2fs_inode_info *fi = F2FS_I(inode);
171 struct inmem_pages *new;
Jaegeuk Kim9be32d72014-12-05 10:39:49 -0800172
Jaegeuk Kim9e4ded32014-12-17 19:58:58 -0800173 f2fs_trace_pid(page);
Jaegeuk Kim0722b102014-12-05 11:58:02 -0800174
Chao Yudecd36b2015-08-07 18:42:09 +0800175 set_page_private(page, (unsigned long)ATOMIC_WRITTEN_PAGE);
176 SetPagePrivate(page);
177
Jaegeuk Kim88b88a62014-10-06 17:39:50 -0700178 new = f2fs_kmem_cache_alloc(inmem_entry_slab, GFP_NOFS);
179
180 /* add atomic page indices to the list */
181 new->page = page;
182 INIT_LIST_HEAD(&new->list);
Chao Yudecd36b2015-08-07 18:42:09 +0800183
Jaegeuk Kim88b88a62014-10-06 17:39:50 -0700184 /* increase reference count with clean state */
185 mutex_lock(&fi->inmem_lock);
186 get_page(page);
187 list_add_tail(&new->list, &fi->inmem_pages);
Jaegeuk Kim8dcf2ff72014-12-05 17:18:15 -0800188 inc_page_count(F2FS_I_SB(inode), F2FS_INMEM_PAGES);
Jaegeuk Kim88b88a62014-10-06 17:39:50 -0700189 mutex_unlock(&fi->inmem_lock);
Jaegeuk Kim8ce67cb2015-03-17 17:58:08 -0700190
191 trace_f2fs_register_inmem_page(page, INMEM);
Jaegeuk Kim88b88a62014-10-06 17:39:50 -0700192}
193
Chao Yu28bc1062016-02-06 14:40:34 +0800194static int __revoke_inmem_pages(struct inode *inode,
195 struct list_head *head, bool drop, bool recover)
Jaegeuk Kim88b88a62014-10-06 17:39:50 -0700196{
Chao Yu28bc1062016-02-06 14:40:34 +0800197 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
Jaegeuk Kim88b88a62014-10-06 17:39:50 -0700198 struct inmem_pages *cur, *tmp;
Chao Yu28bc1062016-02-06 14:40:34 +0800199 int err = 0;
Jaegeuk Kim88b88a62014-10-06 17:39:50 -0700200
Chao Yu29b96b52016-02-06 14:38:29 +0800201 list_for_each_entry_safe(cur, tmp, head, list) {
Chao Yu28bc1062016-02-06 14:40:34 +0800202 struct page *page = cur->page;
Jaegeuk Kim88b88a62014-10-06 17:39:50 -0700203
Chao Yu28bc1062016-02-06 14:40:34 +0800204 if (drop)
205 trace_f2fs_commit_inmem_page(page, INMEM_DROP);
206
207 lock_page(page);
208
209 if (recover) {
210 struct dnode_of_data dn;
211 struct node_info ni;
212
213 trace_f2fs_commit_inmem_page(page, INMEM_REVOKE);
214
215 set_new_dnode(&dn, inode, NULL, NULL, 0);
216 if (get_dnode_of_data(&dn, page->index, LOOKUP_NODE)) {
217 err = -EAGAIN;
218 goto next;
219 }
220 get_node_info(sbi, dn.nid, &ni);
221 f2fs_replace_block(sbi, &dn, dn.data_blkaddr,
222 cur->old_addr, ni.version, true, true);
223 f2fs_put_dnode(&dn);
224 }
225next:
Jaegeuk Kim63c52d72016-04-12 14:11:03 -0700226 /* we don't need to invalidate this in the sccessful status */
227 if (drop || recover)
228 ClearPageUptodate(page);
Chao Yu28bc1062016-02-06 14:40:34 +0800229 set_page_private(page, 0);
Chao Yuc81ced02016-04-29 20:13:36 +0800230 ClearPagePrivate(page);
Chao Yu28bc1062016-02-06 14:40:34 +0800231 f2fs_put_page(page, 1);
Chao Yudecd36b2015-08-07 18:42:09 +0800232
Jaegeuk Kim88b88a62014-10-06 17:39:50 -0700233 list_del(&cur->list);
234 kmem_cache_free(inmem_entry_slab, cur);
Jaegeuk Kim8dcf2ff72014-12-05 17:18:15 -0800235 dec_page_count(F2FS_I_SB(inode), F2FS_INMEM_PAGES);
Jaegeuk Kim88b88a62014-10-06 17:39:50 -0700236 }
Chao Yu28bc1062016-02-06 14:40:34 +0800237 return err;
Chao Yu29b96b52016-02-06 14:38:29 +0800238}
239
240void drop_inmem_pages(struct inode *inode)
241{
242 struct f2fs_inode_info *fi = F2FS_I(inode);
243
Jaegeuk Kim26dc3d42016-04-11 13:15:10 -0700244 clear_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE);
245
Chao Yu29b96b52016-02-06 14:38:29 +0800246 mutex_lock(&fi->inmem_lock);
Chao Yu28bc1062016-02-06 14:40:34 +0800247 __revoke_inmem_pages(inode, &fi->inmem_pages, true, false);
Chao Yu29b96b52016-02-06 14:38:29 +0800248 mutex_unlock(&fi->inmem_lock);
249}
250
Chao Yu28bc1062016-02-06 14:40:34 +0800251static int __commit_inmem_pages(struct inode *inode,
252 struct list_head *revoke_list)
Chao Yu29b96b52016-02-06 14:38:29 +0800253{
254 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
255 struct f2fs_inode_info *fi = F2FS_I(inode);
256 struct inmem_pages *cur, *tmp;
257 struct f2fs_io_info fio = {
258 .sbi = sbi,
259 .type = DATA,
260 .rw = WRITE_SYNC | REQ_PRIO,
261 .encrypted_page = NULL,
262 };
263 bool submit_bio = false;
264 int err = 0;
265
266 list_for_each_entry_safe(cur, tmp, &fi->inmem_pages, list) {
Chao Yu28bc1062016-02-06 14:40:34 +0800267 struct page *page = cur->page;
268
269 lock_page(page);
270 if (page->mapping == inode->i_mapping) {
271 trace_f2fs_commit_inmem_page(page, INMEM);
272
273 set_page_dirty(page);
274 f2fs_wait_on_page_writeback(page, DATA, true);
275 if (clear_page_dirty_for_io(page))
Chao Yu29b96b52016-02-06 14:38:29 +0800276 inode_dec_dirty_pages(inode);
Chao Yu28bc1062016-02-06 14:40:34 +0800277
278 fio.page = page;
Chao Yu29b96b52016-02-06 14:38:29 +0800279 err = do_write_data_page(&fio);
280 if (err) {
Chao Yu28bc1062016-02-06 14:40:34 +0800281 unlock_page(page);
Chao Yu29b96b52016-02-06 14:38:29 +0800282 break;
283 }
Chao Yu28bc1062016-02-06 14:40:34 +0800284
285 /* record old blkaddr for revoking */
286 cur->old_addr = fio.old_blkaddr;
287
288 clear_cold_data(page);
Chao Yu29b96b52016-02-06 14:38:29 +0800289 submit_bio = true;
290 }
Chao Yu28bc1062016-02-06 14:40:34 +0800291 unlock_page(page);
292 list_move_tail(&cur->list, revoke_list);
Chao Yu29b96b52016-02-06 14:38:29 +0800293 }
294
295 if (submit_bio)
296 f2fs_submit_merged_bio_cond(sbi, inode, NULL, 0, DATA, WRITE);
Chao Yu28bc1062016-02-06 14:40:34 +0800297
298 if (!err)
299 __revoke_inmem_pages(inode, revoke_list, false, false);
300
Chao Yu29b96b52016-02-06 14:38:29 +0800301 return err;
302}
303
304int commit_inmem_pages(struct inode *inode)
305{
306 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
307 struct f2fs_inode_info *fi = F2FS_I(inode);
Chao Yu28bc1062016-02-06 14:40:34 +0800308 struct list_head revoke_list;
309 int err;
Chao Yu29b96b52016-02-06 14:38:29 +0800310
Chao Yu28bc1062016-02-06 14:40:34 +0800311 INIT_LIST_HEAD(&revoke_list);
Chao Yu29b96b52016-02-06 14:38:29 +0800312 f2fs_balance_fs(sbi, true);
313 f2fs_lock_op(sbi);
314
315 mutex_lock(&fi->inmem_lock);
Chao Yu28bc1062016-02-06 14:40:34 +0800316 err = __commit_inmem_pages(inode, &revoke_list);
317 if (err) {
318 int ret;
319 /*
320 * try to revoke all committed pages, but still we could fail
321 * due to no memory or other reason, if that happened, EAGAIN
322 * will be returned, which means in such case, transaction is
323 * already not integrity, caller should use journal to do the
324 * recovery or rewrite & commit last transaction. For other
325 * error number, revoking was done by filesystem itself.
326 */
327 ret = __revoke_inmem_pages(inode, &revoke_list, false, true);
328 if (ret)
329 err = ret;
330
331 /* drop all uncommitted pages */
332 __revoke_inmem_pages(inode, &fi->inmem_pages, true, false);
333 }
Jaegeuk Kim88b88a62014-10-06 17:39:50 -0700334 mutex_unlock(&fi->inmem_lock);
335
Chao Yu29b96b52016-02-06 14:38:29 +0800336 f2fs_unlock_op(sbi);
Jaegeuk Kimedb27de2015-07-25 00:52:52 -0700337 return err;
Jaegeuk Kim88b88a62014-10-06 17:39:50 -0700338}
339
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +0900340/*
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900341 * This function balances dirty node and dentry pages.
342 * In addition, it controls garbage collection.
343 */
Jaegeuk Kim2c4db1a2016-01-07 14:15:04 -0800344void f2fs_balance_fs(struct f2fs_sb_info *sbi, bool need)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900345{
Jaegeuk Kim2c4db1a2016-01-07 14:15:04 -0800346 if (!need)
347 return;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900348 /*
Jaegeuk Kim029cd282012-12-21 17:20:21 +0900349 * We should do GC or end up with checkpoint, if there are so many dirty
350 * dir/node pages without enough free segments.
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900351 */
Jaegeuk Kim43727522013-02-04 15:11:17 +0900352 if (has_not_enough_free_secs(sbi, 0)) {
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900353 mutex_lock(&sbi->gc_mutex);
Chao Yud530d4d2015-10-05 22:22:44 +0800354 f2fs_gc(sbi, false);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900355 }
356}
357
Jaegeuk Kim4660f9c2013-10-24 14:19:18 +0900358void f2fs_balance_fs_bg(struct f2fs_sb_info *sbi)
359{
Chao Yu1dcc3362015-02-05 17:57:31 +0800360 /* try to shrink extent cache when there is no enough memory */
Jaegeuk Kim554df792015-06-19 13:41:23 -0700361 if (!available_free_memory(sbi, EXTENT_CACHE))
362 f2fs_shrink_extent_tree(sbi, EXTENT_CACHE_SHRINK_NUMBER);
Chao Yu1dcc3362015-02-05 17:57:31 +0800363
Jaegeuk Kim1b38dc82015-06-19 15:36:07 -0700364 /* check the # of cached NAT entries */
365 if (!available_free_memory(sbi, NAT_ENTRIES))
366 try_to_free_nats(sbi, NAT_ENTRY_PER_BLOCK);
367
Chao Yu31696582015-07-28 18:33:46 +0800368 if (!available_free_memory(sbi, FREE_NIDS))
369 try_to_free_nids(sbi, NAT_ENTRY_PER_BLOCK * FREE_NID_PAGES);
370
Jaegeuk Kim1b38dc82015-06-19 15:36:07 -0700371 /* checkpoint is the only way to shrink partial cached entries */
372 if (!available_free_memory(sbi, NAT_ENTRIES) ||
Jaegeuk Kim60b99b42015-10-05 14:49:57 -0700373 !available_free_memory(sbi, INO_ENTRIES) ||
Chao Yu7d768d22016-01-18 18:31:18 +0800374 excess_prefree_segs(sbi) ||
375 excess_dirty_nats(sbi) ||
Jaegeuk Kimd0239e12016-01-08 16:57:48 -0800376 (is_idle(sbi) && f2fs_time_over(sbi, CP_TIME))) {
Chao Yue9f5b8b2016-02-14 18:54:33 +0800377 if (test_opt(sbi, DATA_FLUSH)) {
378 struct blk_plug plug;
379
380 blk_start_plug(&plug);
Chao Yu36b35a02015-12-17 17:13:28 +0800381 sync_dirty_inodes(sbi, FILE_INODE);
Chao Yue9f5b8b2016-02-14 18:54:33 +0800382 blk_finish_plug(&plug);
383 }
Jaegeuk Kim4660f9c2013-10-24 14:19:18 +0900384 f2fs_sync_fs(sbi->sb, true);
Jaegeuk Kim42190d22016-01-09 13:45:17 -0800385 stat_inc_bg_cp_count(sbi->stat_info);
Chao Yu36b35a02015-12-17 17:13:28 +0800386 }
Jaegeuk Kim4660f9c2013-10-24 14:19:18 +0900387}
388
Gu Zheng2163d192014-04-27 14:21:33 +0800389static int issue_flush_thread(void *data)
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900390{
391 struct f2fs_sb_info *sbi = data;
Gu Zhenga688b9d9e2014-04-27 14:21:21 +0800392 struct flush_cmd_control *fcc = SM_I(sbi)->cmd_control_info;
393 wait_queue_head_t *q = &fcc->flush_wait_queue;
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900394repeat:
395 if (kthread_should_stop())
396 return 0;
397
Gu Zheng721bd4d2014-09-05 18:31:00 +0800398 if (!llist_empty(&fcc->issue_list)) {
Jaegeuk Kim740432f2015-08-14 11:43:56 -0700399 struct bio *bio;
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900400 struct flush_cmd *cmd, *next;
401 int ret;
402
Jaegeuk Kim740432f2015-08-14 11:43:56 -0700403 bio = f2fs_bio_alloc(0);
404
Gu Zheng721bd4d2014-09-05 18:31:00 +0800405 fcc->dispatch_list = llist_del_all(&fcc->issue_list);
406 fcc->dispatch_list = llist_reverse_order(fcc->dispatch_list);
407
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900408 bio->bi_bdev = sbi->sb->s_bdev;
Mike Christie4e49ea42016-06-05 14:31:41 -0500409 bio->bi_rw = WRITE_FLUSH;
410 ret = submit_bio_wait(bio);
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900411
Gu Zheng721bd4d2014-09-05 18:31:00 +0800412 llist_for_each_entry_safe(cmd, next,
413 fcc->dispatch_list, llnode) {
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900414 cmd->ret = ret;
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900415 complete(&cmd->wait);
416 }
Gu Zhenga4ed23f2014-04-11 17:49:35 +0800417 bio_put(bio);
Gu Zhenga688b9d9e2014-04-27 14:21:21 +0800418 fcc->dispatch_list = NULL;
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900419 }
420
Gu Zhenga688b9d9e2014-04-27 14:21:21 +0800421 wait_event_interruptible(*q,
Gu Zheng721bd4d2014-09-05 18:31:00 +0800422 kthread_should_stop() || !llist_empty(&fcc->issue_list));
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900423 goto repeat;
424}
425
426int f2fs_issue_flush(struct f2fs_sb_info *sbi)
427{
Gu Zhenga688b9d9e2014-04-27 14:21:21 +0800428 struct flush_cmd_control *fcc = SM_I(sbi)->cmd_control_info;
Chao Yuadf8d902014-05-08 17:00:35 +0800429 struct flush_cmd cmd;
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900430
Jaegeuk Kim24a9ee02014-07-25 17:46:10 -0700431 trace_f2fs_issue_flush(sbi->sb, test_opt(sbi, NOBARRIER),
432 test_opt(sbi, FLUSH_MERGE));
433
Jaegeuk Kim0f7b2ab2014-07-23 09:57:31 -0700434 if (test_opt(sbi, NOBARRIER))
435 return 0;
436
Jaegeuk Kim740432f2015-08-14 11:43:56 -0700437 if (!test_opt(sbi, FLUSH_MERGE)) {
438 struct bio *bio = f2fs_bio_alloc(0);
439 int ret;
440
441 bio->bi_bdev = sbi->sb->s_bdev;
Mike Christie4e49ea42016-06-05 14:31:41 -0500442 bio->bi_rw = WRITE_FLUSH;
443 ret = submit_bio_wait(bio);
Jaegeuk Kim740432f2015-08-14 11:43:56 -0700444 bio_put(bio);
445 return ret;
446 }
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900447
Chao Yuadf8d902014-05-08 17:00:35 +0800448 init_completion(&cmd.wait);
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900449
Gu Zheng721bd4d2014-09-05 18:31:00 +0800450 llist_add(&cmd.llnode, &fcc->issue_list);
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900451
Gu Zhenga688b9d9e2014-04-27 14:21:21 +0800452 if (!fcc->dispatch_list)
453 wake_up(&fcc->flush_wait_queue);
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900454
Chao Yuadf8d902014-05-08 17:00:35 +0800455 wait_for_completion(&cmd.wait);
456
457 return cmd.ret;
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900458}
459
Gu Zheng2163d192014-04-27 14:21:33 +0800460int create_flush_cmd_control(struct f2fs_sb_info *sbi)
461{
462 dev_t dev = sbi->sb->s_bdev->bd_dev;
463 struct flush_cmd_control *fcc;
464 int err = 0;
465
466 fcc = kzalloc(sizeof(struct flush_cmd_control), GFP_KERNEL);
467 if (!fcc)
468 return -ENOMEM;
Gu Zheng2163d192014-04-27 14:21:33 +0800469 init_waitqueue_head(&fcc->flush_wait_queue);
Gu Zheng721bd4d2014-09-05 18:31:00 +0800470 init_llist_head(&fcc->issue_list);
Chao Yu6b2920a2014-07-07 11:21:59 +0800471 SM_I(sbi)->cmd_control_info = fcc;
Gu Zheng2163d192014-04-27 14:21:33 +0800472 fcc->f2fs_issue_flush = kthread_run(issue_flush_thread, sbi,
473 "f2fs_flush-%u:%u", MAJOR(dev), MINOR(dev));
474 if (IS_ERR(fcc->f2fs_issue_flush)) {
475 err = PTR_ERR(fcc->f2fs_issue_flush);
476 kfree(fcc);
Chao Yu6b2920a2014-07-07 11:21:59 +0800477 SM_I(sbi)->cmd_control_info = NULL;
Gu Zheng2163d192014-04-27 14:21:33 +0800478 return err;
479 }
Gu Zheng2163d192014-04-27 14:21:33 +0800480
481 return err;
482}
483
484void destroy_flush_cmd_control(struct f2fs_sb_info *sbi)
485{
Chao Yu6b2920a2014-07-07 11:21:59 +0800486 struct flush_cmd_control *fcc = SM_I(sbi)->cmd_control_info;
Gu Zheng2163d192014-04-27 14:21:33 +0800487
488 if (fcc && fcc->f2fs_issue_flush)
489 kthread_stop(fcc->f2fs_issue_flush);
490 kfree(fcc);
Chao Yu6b2920a2014-07-07 11:21:59 +0800491 SM_I(sbi)->cmd_control_info = NULL;
Gu Zheng2163d192014-04-27 14:21:33 +0800492}
493
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900494static void __locate_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno,
495 enum dirty_type dirty_type)
496{
497 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
498
499 /* need not be added */
500 if (IS_CURSEG(sbi, segno))
501 return;
502
503 if (!test_and_set_bit(segno, dirty_i->dirty_segmap[dirty_type]))
504 dirty_i->nr_dirty[dirty_type]++;
505
506 if (dirty_type == DIRTY) {
507 struct seg_entry *sentry = get_seg_entry(sbi, segno);
Changman Lee4625d6a2013-10-25 17:31:57 +0900508 enum dirty_type t = sentry->type;
Jaegeuk Kimb2f2c392013-04-01 13:52:09 +0900509
Jaegeuk Kimec325b52014-09-02 16:24:11 -0700510 if (unlikely(t >= DIRTY)) {
511 f2fs_bug_on(sbi, 1);
512 return;
513 }
Changman Lee4625d6a2013-10-25 17:31:57 +0900514 if (!test_and_set_bit(segno, dirty_i->dirty_segmap[t]))
515 dirty_i->nr_dirty[t]++;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900516 }
517}
518
519static void __remove_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno,
520 enum dirty_type dirty_type)
521{
522 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
523
524 if (test_and_clear_bit(segno, dirty_i->dirty_segmap[dirty_type]))
525 dirty_i->nr_dirty[dirty_type]--;
526
527 if (dirty_type == DIRTY) {
Changman Lee4625d6a2013-10-25 17:31:57 +0900528 struct seg_entry *sentry = get_seg_entry(sbi, segno);
529 enum dirty_type t = sentry->type;
Jaegeuk Kimb2f2c392013-04-01 13:52:09 +0900530
Changman Lee4625d6a2013-10-25 17:31:57 +0900531 if (test_and_clear_bit(segno, dirty_i->dirty_segmap[t]))
532 dirty_i->nr_dirty[t]--;
Jaegeuk Kimb2f2c392013-04-01 13:52:09 +0900533
Jaegeuk Kim5ec4e492013-03-31 13:26:03 +0900534 if (get_valid_blocks(sbi, segno, sbi->segs_per_sec) == 0)
535 clear_bit(GET_SECNO(sbi, segno),
536 dirty_i->victim_secmap);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900537 }
538}
539
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +0900540/*
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900541 * Should not occur error such as -ENOMEM.
542 * Adding dirty entry into seglist is not critical operation.
543 * If a given segment is one of current working segments, it won't be added.
544 */
Haicheng Li8d8451a2013-06-13 16:59:28 +0800545static void locate_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900546{
547 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
548 unsigned short valid_blocks;
549
550 if (segno == NULL_SEGNO || IS_CURSEG(sbi, segno))
551 return;
552
553 mutex_lock(&dirty_i->seglist_lock);
554
555 valid_blocks = get_valid_blocks(sbi, segno, 0);
556
557 if (valid_blocks == 0) {
558 __locate_dirty_segment(sbi, segno, PRE);
559 __remove_dirty_segment(sbi, segno, DIRTY);
560 } else if (valid_blocks < sbi->blocks_per_seg) {
561 __locate_dirty_segment(sbi, segno, DIRTY);
562 } else {
563 /* Recovery routine with SSR needs this */
564 __remove_dirty_segment(sbi, segno, DIRTY);
565 }
566
567 mutex_unlock(&dirty_i->seglist_lock);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900568}
569
Jaegeuk Kim1e87a782014-04-15 13:57:55 +0900570static int f2fs_issue_discard(struct f2fs_sb_info *sbi,
Jaegeuk Kim37208872013-11-12 16:55:17 +0900571 block_t blkstart, block_t blklen)
572{
Chao Yu55cf9cb2014-09-15 18:01:10 +0800573 sector_t start = SECTOR_FROM_BLOCK(blkstart);
574 sector_t len = SECTOR_FROM_BLOCK(blklen);
Jaegeuk Kima66cdd92015-04-30 22:37:50 -0700575 struct seg_entry *se;
576 unsigned int offset;
577 block_t i;
578
579 for (i = blkstart; i < blkstart + blklen; i++) {
580 se = get_seg_entry(sbi, GET_SEGNO(sbi, i));
581 offset = GET_BLKOFF_FROM_SEG0(sbi, i);
582
583 if (!f2fs_test_and_set_bit(offset, se->discard_map))
584 sbi->discard_blks--;
585 }
Jaegeuk Kim1661d072013-11-12 17:01:00 +0900586 trace_f2fs_issue_discard(sbi->sb, blkstart, blklen);
Jaegeuk Kim1e87a782014-04-15 13:57:55 +0900587 return blkdev_issue_discard(sbi->sb->s_bdev, start, len, GFP_NOFS, 0);
588}
589
Chao Yue90c2d22015-07-28 18:36:47 +0800590bool discard_next_dnode(struct f2fs_sb_info *sbi, block_t blkaddr)
Jaegeuk Kim1e87a782014-04-15 13:57:55 +0900591{
Jaegeuk Kim60b286c2016-02-09 10:24:31 -0800592 int err = -EOPNOTSUPP;
Jaegeuk Kim40a02be2015-05-11 20:03:49 -0700593
594 if (test_opt(sbi, DISCARD)) {
595 struct seg_entry *se = get_seg_entry(sbi,
596 GET_SEGNO(sbi, blkaddr));
597 unsigned int offset = GET_BLKOFF_FROM_SEG0(sbi, blkaddr);
598
599 if (f2fs_test_bit(offset, se->discard_map))
Chao Yue90c2d22015-07-28 18:36:47 +0800600 return false;
Jaegeuk Kim40a02be2015-05-11 20:03:49 -0700601
602 err = f2fs_issue_discard(sbi, blkaddr, 1);
603 }
604
Chao Yue90c2d22015-07-28 18:36:47 +0800605 if (err) {
Chao Yu381722d2015-05-19 17:40:04 +0800606 update_meta_page(sbi, NULL, blkaddr);
Chao Yue90c2d22015-07-28 18:36:47 +0800607 return true;
608 }
609 return false;
Jaegeuk Kim37208872013-11-12 16:55:17 +0900610}
611
Jaegeuk Kimadf49832014-10-28 22:27:59 -0700612static void __add_discard_entry(struct f2fs_sb_info *sbi,
Jaegeuk Kima66cdd92015-04-30 22:37:50 -0700613 struct cp_control *cpc, struct seg_entry *se,
614 unsigned int start, unsigned int end)
Jaegeuk Kimb2955552013-11-12 14:49:56 +0900615{
616 struct list_head *head = &SM_I(sbi)->discard_list;
Jaegeuk Kimadf49832014-10-28 22:27:59 -0700617 struct discard_entry *new, *last;
618
619 if (!list_empty(head)) {
620 last = list_last_entry(head, struct discard_entry, list);
621 if (START_BLOCK(sbi, cpc->trim_start) + start ==
622 last->blkaddr + last->len) {
623 last->len += end - start;
624 goto done;
625 }
626 }
627
628 new = f2fs_kmem_cache_alloc(discard_entry_slab, GFP_NOFS);
629 INIT_LIST_HEAD(&new->list);
630 new->blkaddr = START_BLOCK(sbi, cpc->trim_start) + start;
631 new->len = end - start;
632 list_add_tail(&new->list, head);
633done:
634 SM_I(sbi)->nr_discards += end - start;
Jaegeuk Kimadf49832014-10-28 22:27:59 -0700635}
636
637static void add_discard_addrs(struct f2fs_sb_info *sbi, struct cp_control *cpc)
638{
Jaegeuk Kimb2955552013-11-12 14:49:56 +0900639 int entries = SIT_VBLOCK_MAP_SIZE / sizeof(unsigned long);
640 int max_blocks = sbi->blocks_per_seg;
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -0700641 struct seg_entry *se = get_seg_entry(sbi, cpc->trim_start);
Jaegeuk Kimb2955552013-11-12 14:49:56 +0900642 unsigned long *cur_map = (unsigned long *)se->cur_valid_map;
643 unsigned long *ckpt_map = (unsigned long *)se->ckpt_valid_map;
Jaegeuk Kima66cdd92015-04-30 22:37:50 -0700644 unsigned long *discard_map = (unsigned long *)se->discard_map;
Jaegeuk Kim60a3b782015-02-10 16:44:29 -0800645 unsigned long *dmap = SIT_I(sbi)->tmp_map;
Jaegeuk Kimb2955552013-11-12 14:49:56 +0900646 unsigned int start = 0, end = -1;
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -0700647 bool force = (cpc->reason == CP_DISCARD);
Jaegeuk Kimb2955552013-11-12 14:49:56 +0900648 int i;
649
Jaegeuk Kima66cdd92015-04-30 22:37:50 -0700650 if (se->valid_blocks == max_blocks)
Jaegeuk Kimb2955552013-11-12 14:49:56 +0900651 return;
652
Jaegeuk Kima66cdd92015-04-30 22:37:50 -0700653 if (!force) {
654 if (!test_opt(sbi, DISCARD) || !se->valid_blocks ||
Dan Carpenter912a83b2015-05-14 11:52:28 +0300655 SM_I(sbi)->nr_discards >= SM_I(sbi)->max_discards)
656 return;
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -0700657 }
658
Jaegeuk Kimb2955552013-11-12 14:49:56 +0900659 /* SIT_VBLOCK_MAP_SIZE should be multiple of sizeof(unsigned long) */
660 for (i = 0; i < entries; i++)
Jaegeuk Kima66cdd92015-04-30 22:37:50 -0700661 dmap[i] = force ? ~ckpt_map[i] & ~discard_map[i] :
Jaegeuk Kimd7bc2482014-12-12 13:53:41 -0800662 (cur_map[i] ^ ckpt_map[i]) & ckpt_map[i];
Jaegeuk Kimb2955552013-11-12 14:49:56 +0900663
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -0700664 while (force || SM_I(sbi)->nr_discards <= SM_I(sbi)->max_discards) {
Jaegeuk Kimb2955552013-11-12 14:49:56 +0900665 start = __find_rev_next_bit(dmap, max_blocks, end + 1);
666 if (start >= max_blocks)
667 break;
668
669 end = __find_rev_next_zero_bit(dmap, max_blocks, start + 1);
Jaegeuk Kima66cdd92015-04-30 22:37:50 -0700670 __add_discard_entry(sbi, cpc, se, start, end);
Jaegeuk Kimb2955552013-11-12 14:49:56 +0900671 }
672}
673
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -0700674void release_discard_addrs(struct f2fs_sb_info *sbi)
675{
676 struct list_head *head = &(SM_I(sbi)->discard_list);
677 struct discard_entry *entry, *this;
678
679 /* drop caches */
680 list_for_each_entry_safe(entry, this, head, list) {
681 list_del(&entry->list);
682 kmem_cache_free(discard_entry_slab, entry);
683 }
684}
685
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +0900686/*
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900687 * Should call clear_prefree_segments after checkpoint is done.
688 */
689static void set_prefree_as_free_segments(struct f2fs_sb_info *sbi)
690{
691 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
Chao Yub65ee142014-08-04 10:10:07 +0800692 unsigned int segno;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900693
694 mutex_lock(&dirty_i->seglist_lock);
Jaegeuk Kim7cd85582014-09-23 11:23:01 -0700695 for_each_set_bit(segno, dirty_i->dirty_segmap[PRE], MAIN_SEGS(sbi))
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900696 __set_test_and_free(sbi, segno);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900697 mutex_unlock(&dirty_i->seglist_lock);
698}
699
Jaegeuk Kim836b5a62015-04-30 22:50:06 -0700700void clear_prefree_segments(struct f2fs_sb_info *sbi, struct cp_control *cpc)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900701{
Jaegeuk Kimb2955552013-11-12 14:49:56 +0900702 struct list_head *head = &(SM_I(sbi)->discard_list);
Chao Yu2d7b8222014-03-29 11:33:17 +0800703 struct discard_entry *entry, *this;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900704 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
Changman Lee29e59c12013-11-11 09:24:37 +0900705 unsigned long *prefree_map = dirty_i->dirty_segmap[PRE];
Changman Lee29e59c12013-11-11 09:24:37 +0900706 unsigned int start = 0, end = -1;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900707
708 mutex_lock(&dirty_i->seglist_lock);
Changman Lee29e59c12013-11-11 09:24:37 +0900709
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900710 while (1) {
Changman Lee29e59c12013-11-11 09:24:37 +0900711 int i;
Jaegeuk Kim7cd85582014-09-23 11:23:01 -0700712 start = find_next_bit(prefree_map, MAIN_SEGS(sbi), end + 1);
713 if (start >= MAIN_SEGS(sbi))
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900714 break;
Jaegeuk Kim7cd85582014-09-23 11:23:01 -0700715 end = find_next_zero_bit(prefree_map, MAIN_SEGS(sbi),
716 start + 1);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900717
Changman Lee29e59c12013-11-11 09:24:37 +0900718 for (i = start; i < end; i++)
719 clear_bit(i, prefree_map);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900720
Changman Lee29e59c12013-11-11 09:24:37 +0900721 dirty_i->nr_dirty[PRE] -= end - start;
722
723 if (!test_opt(sbi, DISCARD))
724 continue;
725
Jaegeuk Kim37208872013-11-12 16:55:17 +0900726 f2fs_issue_discard(sbi, START_BLOCK(sbi, start),
727 (end - start) << sbi->log_blocks_per_seg);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900728 }
729 mutex_unlock(&dirty_i->seglist_lock);
Jaegeuk Kimb2955552013-11-12 14:49:56 +0900730
731 /* send small discards */
Chao Yu2d7b8222014-03-29 11:33:17 +0800732 list_for_each_entry_safe(entry, this, head, list) {
Jaegeuk Kim836b5a62015-04-30 22:50:06 -0700733 if (cpc->reason == CP_DISCARD && entry->len < cpc->trim_minlen)
734 goto skip;
Jaegeuk Kim37208872013-11-12 16:55:17 +0900735 f2fs_issue_discard(sbi, entry->blkaddr, entry->len);
Jaegeuk Kimf56aa1c2015-06-02 15:48:20 -0700736 cpc->trimmed += entry->len;
Jaegeuk Kim836b5a62015-04-30 22:50:06 -0700737skip:
Jaegeuk Kimb2955552013-11-12 14:49:56 +0900738 list_del(&entry->list);
739 SM_I(sbi)->nr_discards -= entry->len;
740 kmem_cache_free(discard_entry_slab, entry);
741 }
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900742}
743
Chao Yu184a5cd2014-09-04 18:13:01 +0800744static bool __mark_sit_entry_dirty(struct f2fs_sb_info *sbi, unsigned int segno)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900745{
746 struct sit_info *sit_i = SIT_I(sbi);
Chao Yu184a5cd2014-09-04 18:13:01 +0800747
748 if (!__test_and_set_bit(segno, sit_i->dirty_sentries_bitmap)) {
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900749 sit_i->dirty_sentries++;
Chao Yu184a5cd2014-09-04 18:13:01 +0800750 return false;
751 }
752
753 return true;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900754}
755
756static void __set_sit_entry_type(struct f2fs_sb_info *sbi, int type,
757 unsigned int segno, int modified)
758{
759 struct seg_entry *se = get_seg_entry(sbi, segno);
760 se->type = type;
761 if (modified)
762 __mark_sit_entry_dirty(sbi, segno);
763}
764
765static void update_sit_entry(struct f2fs_sb_info *sbi, block_t blkaddr, int del)
766{
767 struct seg_entry *se;
768 unsigned int segno, offset;
769 long int new_vblocks;
770
771 segno = GET_SEGNO(sbi, blkaddr);
772
773 se = get_seg_entry(sbi, segno);
774 new_vblocks = se->valid_blocks + del;
Jaegeuk Kim491c0852014-02-04 13:01:10 +0900775 offset = GET_BLKOFF_FROM_SEG0(sbi, blkaddr);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900776
Jaegeuk Kim9850cf42014-09-02 15:52:58 -0700777 f2fs_bug_on(sbi, (new_vblocks >> (sizeof(unsigned short) << 3) ||
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900778 (new_vblocks > sbi->blocks_per_seg)));
779
780 se->valid_blocks = new_vblocks;
781 se->mtime = get_mtime(sbi);
782 SIT_I(sbi)->max_mtime = se->mtime;
783
784 /* Update valid block bitmap */
785 if (del > 0) {
Gu Zheng52aca072014-10-20 17:45:51 +0800786 if (f2fs_test_and_set_bit(offset, se->cur_valid_map))
Jaegeuk Kim05796762014-09-02 16:05:00 -0700787 f2fs_bug_on(sbi, 1);
Jaegeuk Kima66cdd92015-04-30 22:37:50 -0700788 if (!f2fs_test_and_set_bit(offset, se->discard_map))
789 sbi->discard_blks--;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900790 } else {
Gu Zheng52aca072014-10-20 17:45:51 +0800791 if (!f2fs_test_and_clear_bit(offset, se->cur_valid_map))
Jaegeuk Kim05796762014-09-02 16:05:00 -0700792 f2fs_bug_on(sbi, 1);
Jaegeuk Kima66cdd92015-04-30 22:37:50 -0700793 if (f2fs_test_and_clear_bit(offset, se->discard_map))
794 sbi->discard_blks++;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900795 }
796 if (!f2fs_test_bit(offset, se->ckpt_valid_map))
797 se->ckpt_valid_blocks += del;
798
799 __mark_sit_entry_dirty(sbi, segno);
800
801 /* update total number of valid blocks to be written in ckpt area */
802 SIT_I(sbi)->written_valid_blocks += del;
803
804 if (sbi->segs_per_sec > 1)
805 get_sec_entry(sbi, segno)->valid_blocks += del;
806}
807
Jaegeuk Kim5e443812014-01-28 12:22:14 +0900808void refresh_sit_entry(struct f2fs_sb_info *sbi, block_t old, block_t new)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900809{
Jaegeuk Kim5e443812014-01-28 12:22:14 +0900810 update_sit_entry(sbi, new, 1);
811 if (GET_SEGNO(sbi, old) != NULL_SEGNO)
812 update_sit_entry(sbi, old, -1);
813
814 locate_dirty_segment(sbi, GET_SEGNO(sbi, old));
815 locate_dirty_segment(sbi, GET_SEGNO(sbi, new));
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900816}
817
818void invalidate_blocks(struct f2fs_sb_info *sbi, block_t addr)
819{
820 unsigned int segno = GET_SEGNO(sbi, addr);
821 struct sit_info *sit_i = SIT_I(sbi);
822
Jaegeuk Kim9850cf42014-09-02 15:52:58 -0700823 f2fs_bug_on(sbi, addr == NULL_ADDR);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900824 if (addr == NEW_ADDR)
825 return;
826
827 /* add it into sit main buffer */
828 mutex_lock(&sit_i->sentry_lock);
829
830 update_sit_entry(sbi, addr, -1);
831
832 /* add it into dirty seglist */
833 locate_dirty_segment(sbi, segno);
834
835 mutex_unlock(&sit_i->sentry_lock);
836}
837
Jaegeuk Kim6e2c64a2015-10-07 12:28:41 -0700838bool is_checkpointed_data(struct f2fs_sb_info *sbi, block_t blkaddr)
839{
840 struct sit_info *sit_i = SIT_I(sbi);
841 unsigned int segno, offset;
842 struct seg_entry *se;
843 bool is_cp = false;
844
845 if (blkaddr == NEW_ADDR || blkaddr == NULL_ADDR)
846 return true;
847
848 mutex_lock(&sit_i->sentry_lock);
849
850 segno = GET_SEGNO(sbi, blkaddr);
851 se = get_seg_entry(sbi, segno);
852 offset = GET_BLKOFF_FROM_SEG0(sbi, blkaddr);
853
854 if (f2fs_test_bit(offset, se->ckpt_valid_map))
855 is_cp = true;
856
857 mutex_unlock(&sit_i->sentry_lock);
858
859 return is_cp;
860}
861
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +0900862/*
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900863 * This function should be resided under the curseg_mutex lock
864 */
865static void __add_sum_entry(struct f2fs_sb_info *sbi, int type,
Haicheng Lie79efe32013-06-13 16:59:27 +0800866 struct f2fs_summary *sum)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900867{
868 struct curseg_info *curseg = CURSEG_I(sbi, type);
869 void *addr = curseg->sum_blk;
Haicheng Lie79efe32013-06-13 16:59:27 +0800870 addr += curseg->next_blkoff * sizeof(struct f2fs_summary);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900871 memcpy(addr, sum, sizeof(struct f2fs_summary));
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900872}
873
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +0900874/*
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900875 * Calculate the number of current summary pages for writing
876 */
Chao Yu3fa06d72014-12-09 14:21:46 +0800877int npages_for_summary_flush(struct f2fs_sb_info *sbi, bool for_ra)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900878{
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900879 int valid_sum_count = 0;
Fan Li9a479382013-10-29 16:21:47 +0800880 int i, sum_in_page;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900881
882 for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) {
883 if (sbi->ckpt->alloc_type[i] == SSR)
884 valid_sum_count += sbi->blocks_per_seg;
Chao Yu3fa06d72014-12-09 14:21:46 +0800885 else {
886 if (for_ra)
887 valid_sum_count += le16_to_cpu(
888 F2FS_CKPT(sbi)->cur_data_blkoff[i]);
889 else
890 valid_sum_count += curseg_blkoff(sbi, i);
891 }
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900892 }
893
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +0300894 sum_in_page = (PAGE_SIZE - 2 * SUM_JOURNAL_SIZE -
Fan Li9a479382013-10-29 16:21:47 +0800895 SUM_FOOTER_SIZE) / SUMMARY_SIZE;
896 if (valid_sum_count <= sum_in_page)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900897 return 1;
Fan Li9a479382013-10-29 16:21:47 +0800898 else if ((valid_sum_count - sum_in_page) <=
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +0300899 (PAGE_SIZE - SUM_FOOTER_SIZE) / SUMMARY_SIZE)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900900 return 2;
901 return 3;
902}
903
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +0900904/*
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900905 * Caller should put this summary page
906 */
907struct page *get_sum_page(struct f2fs_sb_info *sbi, unsigned int segno)
908{
909 return get_meta_page(sbi, GET_SUM_BLOCK(sbi, segno));
910}
911
Chao Yu381722d2015-05-19 17:40:04 +0800912void update_meta_page(struct f2fs_sb_info *sbi, void *src, block_t blk_addr)
913{
914 struct page *page = grab_meta_page(sbi, blk_addr);
915 void *dst = page_address(page);
916
917 if (src)
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +0300918 memcpy(dst, src, PAGE_SIZE);
Chao Yu381722d2015-05-19 17:40:04 +0800919 else
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +0300920 memset(dst, 0, PAGE_SIZE);
Chao Yu381722d2015-05-19 17:40:04 +0800921 set_page_dirty(page);
922 f2fs_put_page(page, 1);
923}
924
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900925static void write_sum_page(struct f2fs_sb_info *sbi,
926 struct f2fs_summary_block *sum_blk, block_t blk_addr)
927{
Chao Yu381722d2015-05-19 17:40:04 +0800928 update_meta_page(sbi, (void *)sum_blk, blk_addr);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900929}
930
Chao Yub7ad7512016-02-19 18:08:46 +0800931static void write_current_sum_page(struct f2fs_sb_info *sbi,
932 int type, block_t blk_addr)
933{
934 struct curseg_info *curseg = CURSEG_I(sbi, type);
935 struct page *page = grab_meta_page(sbi, blk_addr);
936 struct f2fs_summary_block *src = curseg->sum_blk;
937 struct f2fs_summary_block *dst;
938
939 dst = (struct f2fs_summary_block *)page_address(page);
940
941 mutex_lock(&curseg->curseg_mutex);
942
943 down_read(&curseg->journal_rwsem);
944 memcpy(&dst->journal, curseg->journal, SUM_JOURNAL_SIZE);
945 up_read(&curseg->journal_rwsem);
946
947 memcpy(dst->entries, src->entries, SUM_ENTRY_SIZE);
948 memcpy(&dst->footer, &src->footer, SUM_FOOTER_SIZE);
949
950 mutex_unlock(&curseg->curseg_mutex);
951
952 set_page_dirty(page);
953 f2fs_put_page(page, 1);
954}
955
Jaegeuk Kim60374682013-03-31 13:58:51 +0900956static int is_next_segment_free(struct f2fs_sb_info *sbi, int type)
957{
958 struct curseg_info *curseg = CURSEG_I(sbi, type);
Haicheng Li81fb5e82013-05-14 18:20:28 +0800959 unsigned int segno = curseg->segno + 1;
Jaegeuk Kim60374682013-03-31 13:58:51 +0900960 struct free_segmap_info *free_i = FREE_I(sbi);
961
Jaegeuk Kim7cd85582014-09-23 11:23:01 -0700962 if (segno < MAIN_SEGS(sbi) && segno % sbi->segs_per_sec)
Haicheng Li81fb5e82013-05-14 18:20:28 +0800963 return !test_bit(segno, free_i->free_segmap);
Jaegeuk Kim60374682013-03-31 13:58:51 +0900964 return 0;
965}
966
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +0900967/*
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900968 * Find a new segment from the free segments bitmap to right order
969 * This function should be returned with success, otherwise BUG
970 */
971static void get_new_segment(struct f2fs_sb_info *sbi,
972 unsigned int *newseg, bool new_sec, int dir)
973{
974 struct free_segmap_info *free_i = FREE_I(sbi);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900975 unsigned int segno, secno, zoneno;
Jaegeuk Kim7cd85582014-09-23 11:23:01 -0700976 unsigned int total_zones = MAIN_SECS(sbi) / sbi->secs_per_zone;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900977 unsigned int hint = *newseg / sbi->segs_per_sec;
978 unsigned int old_zoneno = GET_ZONENO_FROM_SEGNO(sbi, *newseg);
979 unsigned int left_start = hint;
980 bool init = true;
981 int go_left = 0;
982 int i;
983
Chao Yu1a118cc2015-02-11 18:20:38 +0800984 spin_lock(&free_i->segmap_lock);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900985
986 if (!new_sec && ((*newseg + 1) % sbi->segs_per_sec)) {
987 segno = find_next_zero_bit(free_i->free_segmap,
Chao Yu0ab14352016-01-22 17:42:06 +0800988 (hint + 1) * sbi->segs_per_sec, *newseg + 1);
989 if (segno < (hint + 1) * sbi->segs_per_sec)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900990 goto got_it;
991 }
992find_other_zone:
Jaegeuk Kim7cd85582014-09-23 11:23:01 -0700993 secno = find_next_zero_bit(free_i->free_secmap, MAIN_SECS(sbi), hint);
994 if (secno >= MAIN_SECS(sbi)) {
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900995 if (dir == ALLOC_RIGHT) {
996 secno = find_next_zero_bit(free_i->free_secmap,
Jaegeuk Kim7cd85582014-09-23 11:23:01 -0700997 MAIN_SECS(sbi), 0);
998 f2fs_bug_on(sbi, secno >= MAIN_SECS(sbi));
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900999 } else {
1000 go_left = 1;
1001 left_start = hint - 1;
1002 }
1003 }
1004 if (go_left == 0)
1005 goto skip_left;
1006
1007 while (test_bit(left_start, free_i->free_secmap)) {
1008 if (left_start > 0) {
1009 left_start--;
1010 continue;
1011 }
1012 left_start = find_next_zero_bit(free_i->free_secmap,
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07001013 MAIN_SECS(sbi), 0);
1014 f2fs_bug_on(sbi, left_start >= MAIN_SECS(sbi));
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001015 break;
1016 }
1017 secno = left_start;
1018skip_left:
1019 hint = secno;
1020 segno = secno * sbi->segs_per_sec;
1021 zoneno = secno / sbi->secs_per_zone;
1022
1023 /* give up on finding another zone */
1024 if (!init)
1025 goto got_it;
1026 if (sbi->secs_per_zone == 1)
1027 goto got_it;
1028 if (zoneno == old_zoneno)
1029 goto got_it;
1030 if (dir == ALLOC_LEFT) {
1031 if (!go_left && zoneno + 1 >= total_zones)
1032 goto got_it;
1033 if (go_left && zoneno == 0)
1034 goto got_it;
1035 }
1036 for (i = 0; i < NR_CURSEG_TYPE; i++)
1037 if (CURSEG_I(sbi, i)->zone == zoneno)
1038 break;
1039
1040 if (i < NR_CURSEG_TYPE) {
1041 /* zone is in user, try another */
1042 if (go_left)
1043 hint = zoneno * sbi->secs_per_zone - 1;
1044 else if (zoneno + 1 >= total_zones)
1045 hint = 0;
1046 else
1047 hint = (zoneno + 1) * sbi->secs_per_zone;
1048 init = false;
1049 goto find_other_zone;
1050 }
1051got_it:
1052 /* set it as dirty segment in free segmap */
Jaegeuk Kim9850cf42014-09-02 15:52:58 -07001053 f2fs_bug_on(sbi, test_bit(segno, free_i->free_segmap));
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001054 __set_inuse(sbi, segno);
1055 *newseg = segno;
Chao Yu1a118cc2015-02-11 18:20:38 +08001056 spin_unlock(&free_i->segmap_lock);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001057}
1058
1059static void reset_curseg(struct f2fs_sb_info *sbi, int type, int modified)
1060{
1061 struct curseg_info *curseg = CURSEG_I(sbi, type);
1062 struct summary_footer *sum_footer;
1063
1064 curseg->segno = curseg->next_segno;
1065 curseg->zone = GET_ZONENO_FROM_SEGNO(sbi, curseg->segno);
1066 curseg->next_blkoff = 0;
1067 curseg->next_segno = NULL_SEGNO;
1068
1069 sum_footer = &(curseg->sum_blk->footer);
1070 memset(sum_footer, 0, sizeof(struct summary_footer));
1071 if (IS_DATASEG(type))
1072 SET_SUM_TYPE(sum_footer, SUM_TYPE_DATA);
1073 if (IS_NODESEG(type))
1074 SET_SUM_TYPE(sum_footer, SUM_TYPE_NODE);
1075 __set_sit_entry_type(sbi, type, curseg->segno, modified);
1076}
1077
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +09001078/*
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001079 * Allocate a current working segment.
1080 * This function always allocates a free segment in LFS manner.
1081 */
1082static void new_curseg(struct f2fs_sb_info *sbi, int type, bool new_sec)
1083{
1084 struct curseg_info *curseg = CURSEG_I(sbi, type);
1085 unsigned int segno = curseg->segno;
1086 int dir = ALLOC_LEFT;
1087
1088 write_sum_page(sbi, curseg->sum_blk,
Haicheng Li81fb5e82013-05-14 18:20:28 +08001089 GET_SUM_BLOCK(sbi, segno));
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001090 if (type == CURSEG_WARM_DATA || type == CURSEG_COLD_DATA)
1091 dir = ALLOC_RIGHT;
1092
1093 if (test_opt(sbi, NOHEAP))
1094 dir = ALLOC_RIGHT;
1095
1096 get_new_segment(sbi, &segno, new_sec, dir);
1097 curseg->next_segno = segno;
1098 reset_curseg(sbi, type, 1);
1099 curseg->alloc_type = LFS;
1100}
1101
1102static void __next_free_blkoff(struct f2fs_sb_info *sbi,
1103 struct curseg_info *seg, block_t start)
1104{
1105 struct seg_entry *se = get_seg_entry(sbi, seg->segno);
Changman Leee81c93c2013-11-15 13:21:16 +09001106 int entries = SIT_VBLOCK_MAP_SIZE / sizeof(unsigned long);
Jaegeuk Kim60a3b782015-02-10 16:44:29 -08001107 unsigned long *target_map = SIT_I(sbi)->tmp_map;
Changman Leee81c93c2013-11-15 13:21:16 +09001108 unsigned long *ckpt_map = (unsigned long *)se->ckpt_valid_map;
1109 unsigned long *cur_map = (unsigned long *)se->cur_valid_map;
1110 int i, pos;
1111
1112 for (i = 0; i < entries; i++)
1113 target_map[i] = ckpt_map[i] | cur_map[i];
1114
1115 pos = __find_rev_next_zero_bit(target_map, sbi->blocks_per_seg, start);
1116
1117 seg->next_blkoff = pos;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001118}
1119
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +09001120/*
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001121 * If a segment is written by LFS manner, next block offset is just obtained
1122 * by increasing the current block offset. However, if a segment is written by
1123 * SSR manner, next block offset obtained by calling __next_free_blkoff
1124 */
1125static void __refresh_next_blkoff(struct f2fs_sb_info *sbi,
1126 struct curseg_info *seg)
1127{
1128 if (seg->alloc_type == SSR)
1129 __next_free_blkoff(sbi, seg, seg->next_blkoff + 1);
1130 else
1131 seg->next_blkoff++;
1132}
1133
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +09001134/*
arter97e1c42042014-08-06 23:22:50 +09001135 * This function always allocates a used segment(from dirty seglist) by SSR
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001136 * manner, so it should recover the existing segment information of valid blocks
1137 */
1138static void change_curseg(struct f2fs_sb_info *sbi, int type, bool reuse)
1139{
1140 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
1141 struct curseg_info *curseg = CURSEG_I(sbi, type);
1142 unsigned int new_segno = curseg->next_segno;
1143 struct f2fs_summary_block *sum_node;
1144 struct page *sum_page;
1145
1146 write_sum_page(sbi, curseg->sum_blk,
1147 GET_SUM_BLOCK(sbi, curseg->segno));
1148 __set_test_and_inuse(sbi, new_segno);
1149
1150 mutex_lock(&dirty_i->seglist_lock);
1151 __remove_dirty_segment(sbi, new_segno, PRE);
1152 __remove_dirty_segment(sbi, new_segno, DIRTY);
1153 mutex_unlock(&dirty_i->seglist_lock);
1154
1155 reset_curseg(sbi, type, 1);
1156 curseg->alloc_type = SSR;
1157 __next_free_blkoff(sbi, curseg, 0);
1158
1159 if (reuse) {
1160 sum_page = get_sum_page(sbi, new_segno);
1161 sum_node = (struct f2fs_summary_block *)page_address(sum_page);
1162 memcpy(curseg->sum_blk, sum_node, SUM_ENTRY_SIZE);
1163 f2fs_put_page(sum_page, 1);
1164 }
1165}
1166
Jaegeuk Kim43727522013-02-04 15:11:17 +09001167static int get_ssr_segment(struct f2fs_sb_info *sbi, int type)
1168{
1169 struct curseg_info *curseg = CURSEG_I(sbi, type);
1170 const struct victim_selection *v_ops = DIRTY_I(sbi)->v_ops;
1171
1172 if (IS_NODESEG(type) || !has_not_enough_free_secs(sbi, 0))
1173 return v_ops->get_victim(sbi,
1174 &(curseg)->next_segno, BG_GC, type, SSR);
1175
1176 /* For data segments, let's do SSR more intensively */
1177 for (; type >= CURSEG_HOT_DATA; type--)
1178 if (v_ops->get_victim(sbi, &(curseg)->next_segno,
1179 BG_GC, type, SSR))
1180 return 1;
1181 return 0;
1182}
1183
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001184/*
1185 * flush out current segment and replace it with new segment
1186 * This function should be returned with success, otherwise BUG
1187 */
1188static void allocate_segment_by_default(struct f2fs_sb_info *sbi,
1189 int type, bool force)
1190{
1191 struct curseg_info *curseg = CURSEG_I(sbi, type);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001192
Gu Zheng7b405272013-08-19 09:41:15 +08001193 if (force)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001194 new_curseg(sbi, type, true);
Gu Zheng7b405272013-08-19 09:41:15 +08001195 else if (type == CURSEG_WARM_NODE)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001196 new_curseg(sbi, type, false);
Jaegeuk Kim60374682013-03-31 13:58:51 +09001197 else if (curseg->alloc_type == LFS && is_next_segment_free(sbi, type))
1198 new_curseg(sbi, type, false);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001199 else if (need_SSR(sbi) && get_ssr_segment(sbi, type))
1200 change_curseg(sbi, type, true);
1201 else
1202 new_curseg(sbi, type, false);
Jaegeuk Kimdcdfff62013-10-22 20:56:10 +09001203
1204 stat_inc_seg_type(sbi, curseg);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001205}
1206
Jaegeuk Kim38aa0882015-01-05 16:02:20 -08001207static void __allocate_new_segments(struct f2fs_sb_info *sbi, int type)
1208{
1209 struct curseg_info *curseg = CURSEG_I(sbi, type);
1210 unsigned int old_segno;
1211
1212 old_segno = curseg->segno;
1213 SIT_I(sbi)->s_ops->allocate_segment(sbi, type, true);
1214 locate_dirty_segment(sbi, old_segno);
1215}
1216
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001217void allocate_new_segments(struct f2fs_sb_info *sbi)
1218{
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001219 int i;
1220
Jaegeuk Kim38aa0882015-01-05 16:02:20 -08001221 for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++)
1222 __allocate_new_segments(sbi, i);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001223}
1224
1225static const struct segment_allocation default_salloc_ops = {
1226 .allocate_segment = allocate_segment_by_default,
1227};
1228
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -07001229int f2fs_trim_fs(struct f2fs_sb_info *sbi, struct fstrim_range *range)
1230{
Jaegeuk Kimf7ef9b82015-02-09 12:02:44 -08001231 __u64 start = F2FS_BYTES_TO_BLK(range->start);
1232 __u64 end = start + F2FS_BYTES_TO_BLK(range->len) - 1;
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -07001233 unsigned int start_segno, end_segno;
1234 struct cp_control cpc;
Chao Yuc34f42e2015-12-23 17:50:30 +08001235 int err = 0;
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -07001236
Jaegeuk Kim836b5a62015-04-30 22:50:06 -07001237 if (start >= MAX_BLKADDR(sbi) || range->len < sbi->blocksize)
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -07001238 return -EINVAL;
1239
Jan Kara9bd27ae2014-10-21 14:07:33 +02001240 cpc.trimmed = 0;
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07001241 if (end <= MAIN_BLKADDR(sbi))
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -07001242 goto out;
1243
1244 /* start/end segment number in main_area */
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07001245 start_segno = (start <= MAIN_BLKADDR(sbi)) ? 0 : GET_SEGNO(sbi, start);
1246 end_segno = (end >= MAX_BLKADDR(sbi)) ? MAIN_SEGS(sbi) - 1 :
1247 GET_SEGNO(sbi, end);
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -07001248 cpc.reason = CP_DISCARD;
Jaegeuk Kim836b5a62015-04-30 22:50:06 -07001249 cpc.trim_minlen = max_t(__u64, 1, F2FS_BYTES_TO_BLK(range->minlen));
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -07001250
1251 /* do checkpoint to issue discard commands safely */
Jaegeuk Kimbba681c2015-01-26 17:41:23 -08001252 for (; start_segno <= end_segno; start_segno = cpc.trim_end + 1) {
1253 cpc.trim_start = start_segno;
Jaegeuk Kima66cdd92015-04-30 22:37:50 -07001254
1255 if (sbi->discard_blks == 0)
1256 break;
1257 else if (sbi->discard_blks < BATCHED_TRIM_BLOCKS(sbi))
1258 cpc.trim_end = end_segno;
1259 else
1260 cpc.trim_end = min_t(unsigned int,
1261 rounddown(start_segno +
Jaegeuk Kimbba681c2015-01-26 17:41:23 -08001262 BATCHED_TRIM_SEGMENTS(sbi),
1263 sbi->segs_per_sec) - 1, end_segno);
1264
1265 mutex_lock(&sbi->gc_mutex);
Chao Yuc34f42e2015-12-23 17:50:30 +08001266 err = write_checkpoint(sbi, &cpc);
Jaegeuk Kimbba681c2015-01-26 17:41:23 -08001267 mutex_unlock(&sbi->gc_mutex);
1268 }
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -07001269out:
Jaegeuk Kimf7ef9b82015-02-09 12:02:44 -08001270 range->len = F2FS_BLK_TO_BYTES(cpc.trimmed);
Chao Yuc34f42e2015-12-23 17:50:30 +08001271 return err;
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -07001272}
1273
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001274static bool __has_curseg_space(struct f2fs_sb_info *sbi, int type)
1275{
1276 struct curseg_info *curseg = CURSEG_I(sbi, type);
1277 if (curseg->next_blkoff < sbi->blocks_per_seg)
1278 return true;
1279 return false;
1280}
1281
1282static int __get_segment_type_2(struct page *page, enum page_type p_type)
1283{
1284 if (p_type == DATA)
1285 return CURSEG_HOT_DATA;
1286 else
1287 return CURSEG_HOT_NODE;
1288}
1289
1290static int __get_segment_type_4(struct page *page, enum page_type p_type)
1291{
1292 if (p_type == DATA) {
1293 struct inode *inode = page->mapping->host;
1294
1295 if (S_ISDIR(inode->i_mode))
1296 return CURSEG_HOT_DATA;
1297 else
1298 return CURSEG_COLD_DATA;
1299 } else {
Jaegeuk Kima344b9f2014-11-05 20:05:53 -08001300 if (IS_DNODE(page) && is_cold_node(page))
1301 return CURSEG_WARM_NODE;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001302 else
1303 return CURSEG_COLD_NODE;
1304 }
1305}
1306
1307static int __get_segment_type_6(struct page *page, enum page_type p_type)
1308{
1309 if (p_type == DATA) {
1310 struct inode *inode = page->mapping->host;
1311
1312 if (S_ISDIR(inode->i_mode))
1313 return CURSEG_HOT_DATA;
Jaegeuk Kim354a3392013-06-14 08:52:35 +09001314 else if (is_cold_data(page) || file_is_cold(inode))
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001315 return CURSEG_COLD_DATA;
1316 else
1317 return CURSEG_WARM_DATA;
1318 } else {
1319 if (IS_DNODE(page))
1320 return is_cold_node(page) ? CURSEG_WARM_NODE :
1321 CURSEG_HOT_NODE;
1322 else
1323 return CURSEG_COLD_NODE;
1324 }
1325}
1326
1327static int __get_segment_type(struct page *page, enum page_type p_type)
1328{
Jaegeuk Kim40813632014-09-02 15:31:18 -07001329 switch (F2FS_P_SB(page)->active_logs) {
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001330 case 2:
1331 return __get_segment_type_2(page, p_type);
1332 case 4:
1333 return __get_segment_type_4(page, p_type);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001334 }
Jaegeuk Kim12a67142012-12-21 11:47:05 +09001335 /* NR_CURSEG_TYPE(6) logs by default */
Jaegeuk Kim9850cf42014-09-02 15:52:58 -07001336 f2fs_bug_on(F2FS_P_SB(page),
1337 F2FS_P_SB(page)->active_logs != NR_CURSEG_TYPE);
Jaegeuk Kim12a67142012-12-21 11:47:05 +09001338 return __get_segment_type_6(page, p_type);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001339}
1340
Jaegeuk Kimbfad7c22013-12-16 19:04:05 +09001341void allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
1342 block_t old_blkaddr, block_t *new_blkaddr,
1343 struct f2fs_summary *sum, int type)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001344{
1345 struct sit_info *sit_i = SIT_I(sbi);
1346 struct curseg_info *curseg;
Jaegeuk Kim38aa0882015-01-05 16:02:20 -08001347 bool direct_io = (type == CURSEG_DIRECT_IO);
1348
1349 type = direct_io ? CURSEG_WARM_DATA : type;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001350
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001351 curseg = CURSEG_I(sbi, type);
1352
1353 mutex_lock(&curseg->curseg_mutex);
Jaegeuk Kim21cb1d92015-03-11 13:42:48 -04001354 mutex_lock(&sit_i->sentry_lock);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001355
Jaegeuk Kim38aa0882015-01-05 16:02:20 -08001356 /* direct_io'ed data is aligned to the segment for better performance */
Jaegeuk Kim47e70ca2015-08-11 10:17:27 -07001357 if (direct_io && curseg->next_blkoff &&
1358 !has_not_enough_free_secs(sbi, 0))
Jaegeuk Kim38aa0882015-01-05 16:02:20 -08001359 __allocate_new_segments(sbi, type);
1360
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001361 *new_blkaddr = NEXT_FREE_BLKADDR(sbi, curseg);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001362
1363 /*
1364 * __add_sum_entry should be resided under the curseg_mutex
1365 * because, this function updates a summary entry in the
1366 * current summary block.
1367 */
Haicheng Lie79efe32013-06-13 16:59:27 +08001368 __add_sum_entry(sbi, type, sum);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001369
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001370 __refresh_next_blkoff(sbi, curseg);
Jaegeuk Kimdcdfff62013-10-22 20:56:10 +09001371
1372 stat_inc_block_count(sbi, curseg);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001373
Jaegeuk Kim5e443812014-01-28 12:22:14 +09001374 if (!__has_curseg_space(sbi, type))
1375 sit_i->s_ops->allocate_segment(sbi, type, false);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001376 /*
1377 * SIT information should be updated before segment allocation,
1378 * since SSR needs latest valid block information.
1379 */
1380 refresh_sit_entry(sbi, old_blkaddr, *new_blkaddr);
Jaegeuk Kim5e443812014-01-28 12:22:14 +09001381
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001382 mutex_unlock(&sit_i->sentry_lock);
1383
Jaegeuk Kimbfad7c22013-12-16 19:04:05 +09001384 if (page && IS_NODESEG(type))
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001385 fill_node_footer_blkaddr(page, NEXT_FREE_BLKADDR(sbi, curseg));
1386
Jaegeuk Kimbfad7c22013-12-16 19:04:05 +09001387 mutex_unlock(&curseg->curseg_mutex);
1388}
1389
Jaegeuk Kim05ca3632015-04-23 14:38:15 -07001390static void do_write_page(struct f2fs_summary *sum, struct f2fs_io_info *fio)
Jaegeuk Kimbfad7c22013-12-16 19:04:05 +09001391{
Jaegeuk Kim05ca3632015-04-23 14:38:15 -07001392 int type = __get_segment_type(fio->page, fio->type);
Jaegeuk Kimbfad7c22013-12-16 19:04:05 +09001393
Chao Yu7a9d7542016-02-22 18:36:38 +08001394 allocate_data_block(fio->sbi, fio->page, fio->old_blkaddr,
1395 &fio->new_blkaddr, sum, type);
Jaegeuk Kimbfad7c22013-12-16 19:04:05 +09001396
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001397 /* writeout dirty page into bdev */
Jaegeuk Kim05ca3632015-04-23 14:38:15 -07001398 f2fs_submit_page_mbio(fio);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001399}
1400
Jaegeuk Kim577e3492013-01-24 19:56:11 +09001401void write_meta_page(struct f2fs_sb_info *sbi, struct page *page)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001402{
Jaegeuk Kim458e6192013-12-11 13:54:01 +09001403 struct f2fs_io_info fio = {
Jaegeuk Kim05ca3632015-04-23 14:38:15 -07001404 .sbi = sbi,
Jaegeuk Kim458e6192013-12-11 13:54:01 +09001405 .type = META,
Jaegeuk Kimcf04e8e2014-12-17 19:33:13 -08001406 .rw = WRITE_SYNC | REQ_META | REQ_PRIO,
Chao Yu7a9d7542016-02-22 18:36:38 +08001407 .old_blkaddr = page->index,
1408 .new_blkaddr = page->index,
Jaegeuk Kim05ca3632015-04-23 14:38:15 -07001409 .page = page,
Jaegeuk Kim4375a332015-04-23 12:04:33 -07001410 .encrypted_page = NULL,
Jaegeuk Kim458e6192013-12-11 13:54:01 +09001411 };
1412
Chao Yu2b947002015-10-12 17:04:21 +08001413 if (unlikely(page->index >= MAIN_BLKADDR(sbi)))
1414 fio.rw &= ~REQ_META;
1415
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001416 set_page_writeback(page);
Jaegeuk Kim05ca3632015-04-23 14:38:15 -07001417 f2fs_submit_page_mbio(&fio);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001418}
1419
Jaegeuk Kim05ca3632015-04-23 14:38:15 -07001420void write_node_page(unsigned int nid, struct f2fs_io_info *fio)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001421{
1422 struct f2fs_summary sum;
Jaegeuk Kim05ca3632015-04-23 14:38:15 -07001423
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001424 set_summary(&sum, nid, 0, 0);
Jaegeuk Kim05ca3632015-04-23 14:38:15 -07001425 do_write_page(&sum, fio);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001426}
1427
Jaegeuk Kim05ca3632015-04-23 14:38:15 -07001428void write_data_page(struct dnode_of_data *dn, struct f2fs_io_info *fio)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001429{
Jaegeuk Kim05ca3632015-04-23 14:38:15 -07001430 struct f2fs_sb_info *sbi = fio->sbi;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001431 struct f2fs_summary sum;
1432 struct node_info ni;
1433
Jaegeuk Kim9850cf42014-09-02 15:52:58 -07001434 f2fs_bug_on(sbi, dn->data_blkaddr == NULL_ADDR);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001435 get_node_info(sbi, dn->nid, &ni);
1436 set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version);
Jaegeuk Kim05ca3632015-04-23 14:38:15 -07001437 do_write_page(&sum, fio);
Chao Yuf28b3432016-02-24 17:16:47 +08001438 f2fs_update_data_blkaddr(dn, fio->new_blkaddr);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001439}
1440
Jaegeuk Kim05ca3632015-04-23 14:38:15 -07001441void rewrite_data_page(struct f2fs_io_info *fio)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001442{
Chao Yu7a9d7542016-02-22 18:36:38 +08001443 fio->new_blkaddr = fio->old_blkaddr;
Jaegeuk Kim05ca3632015-04-23 14:38:15 -07001444 stat_inc_inplace_blocks(fio->sbi);
1445 f2fs_submit_page_mbio(fio);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001446}
1447
Chao Yu4356e482016-02-23 17:52:43 +08001448void __f2fs_replace_block(struct f2fs_sb_info *sbi, struct f2fs_summary *sum,
Chao Yu19f106b2015-05-06 13:08:06 +08001449 block_t old_blkaddr, block_t new_blkaddr,
Chao Yu28bc1062016-02-06 14:40:34 +08001450 bool recover_curseg, bool recover_newaddr)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001451{
1452 struct sit_info *sit_i = SIT_I(sbi);
1453 struct curseg_info *curseg;
1454 unsigned int segno, old_cursegno;
1455 struct seg_entry *se;
1456 int type;
Chao Yu19f106b2015-05-06 13:08:06 +08001457 unsigned short old_blkoff;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001458
1459 segno = GET_SEGNO(sbi, new_blkaddr);
1460 se = get_seg_entry(sbi, segno);
1461 type = se->type;
1462
Chao Yu19f106b2015-05-06 13:08:06 +08001463 if (!recover_curseg) {
1464 /* for recovery flow */
1465 if (se->valid_blocks == 0 && !IS_CURSEG(sbi, segno)) {
1466 if (old_blkaddr == NULL_ADDR)
1467 type = CURSEG_COLD_DATA;
1468 else
1469 type = CURSEG_WARM_DATA;
1470 }
1471 } else {
1472 if (!IS_CURSEG(sbi, segno))
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001473 type = CURSEG_WARM_DATA;
1474 }
Chao Yu19f106b2015-05-06 13:08:06 +08001475
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001476 curseg = CURSEG_I(sbi, type);
1477
1478 mutex_lock(&curseg->curseg_mutex);
1479 mutex_lock(&sit_i->sentry_lock);
1480
1481 old_cursegno = curseg->segno;
Chao Yu19f106b2015-05-06 13:08:06 +08001482 old_blkoff = curseg->next_blkoff;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001483
1484 /* change the current segment */
1485 if (segno != curseg->segno) {
1486 curseg->next_segno = segno;
1487 change_curseg(sbi, type, true);
1488 }
1489
Jaegeuk Kim491c0852014-02-04 13:01:10 +09001490 curseg->next_blkoff = GET_BLKOFF_FROM_SEG0(sbi, new_blkaddr);
Haicheng Lie79efe32013-06-13 16:59:27 +08001491 __add_sum_entry(sbi, type, sum);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001492
Chao Yu28bc1062016-02-06 14:40:34 +08001493 if (!recover_curseg || recover_newaddr)
Jaegeuk Kim6e2c64a2015-10-07 12:28:41 -07001494 update_sit_entry(sbi, new_blkaddr, 1);
1495 if (GET_SEGNO(sbi, old_blkaddr) != NULL_SEGNO)
1496 update_sit_entry(sbi, old_blkaddr, -1);
1497
1498 locate_dirty_segment(sbi, GET_SEGNO(sbi, old_blkaddr));
1499 locate_dirty_segment(sbi, GET_SEGNO(sbi, new_blkaddr));
1500
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001501 locate_dirty_segment(sbi, old_cursegno);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001502
Chao Yu19f106b2015-05-06 13:08:06 +08001503 if (recover_curseg) {
1504 if (old_cursegno != curseg->segno) {
1505 curseg->next_segno = old_cursegno;
1506 change_curseg(sbi, type, true);
1507 }
1508 curseg->next_blkoff = old_blkoff;
1509 }
1510
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001511 mutex_unlock(&sit_i->sentry_lock);
1512 mutex_unlock(&curseg->curseg_mutex);
1513}
1514
Chao Yu528e3452015-05-28 19:15:35 +08001515void f2fs_replace_block(struct f2fs_sb_info *sbi, struct dnode_of_data *dn,
1516 block_t old_addr, block_t new_addr,
Chao Yu28bc1062016-02-06 14:40:34 +08001517 unsigned char version, bool recover_curseg,
1518 bool recover_newaddr)
Chao Yu528e3452015-05-28 19:15:35 +08001519{
1520 struct f2fs_summary sum;
1521
1522 set_summary(&sum, dn->nid, dn->ofs_in_node, version);
1523
Chao Yu28bc1062016-02-06 14:40:34 +08001524 __f2fs_replace_block(sbi, &sum, old_addr, new_addr,
1525 recover_curseg, recover_newaddr);
Chao Yu528e3452015-05-28 19:15:35 +08001526
Chao Yuf28b3432016-02-24 17:16:47 +08001527 f2fs_update_data_blkaddr(dn, new_addr);
Chao Yu528e3452015-05-28 19:15:35 +08001528}
1529
Jaegeuk Kim93dfe2a2013-11-30 12:51:14 +09001530void f2fs_wait_on_page_writeback(struct page *page,
Jaegeuk Kimfec1d652016-01-20 23:43:51 +08001531 enum page_type type, bool ordered)
Jaegeuk Kim93dfe2a2013-11-30 12:51:14 +09001532{
Jaegeuk Kim93dfe2a2013-11-30 12:51:14 +09001533 if (PageWriteback(page)) {
Jaegeuk Kim40813632014-09-02 15:31:18 -07001534 struct f2fs_sb_info *sbi = F2FS_P_SB(page);
1535
Chao Yu0c3a5792016-01-18 18:28:11 +08001536 f2fs_submit_merged_bio_cond(sbi, NULL, page, 0, type, WRITE);
Jaegeuk Kimfec1d652016-01-20 23:43:51 +08001537 if (ordered)
1538 wait_on_page_writeback(page);
1539 else
1540 wait_for_stable_page(page);
Jaegeuk Kim93dfe2a2013-11-30 12:51:14 +09001541 }
1542}
1543
Chao Yu08b39fb2015-10-08 13:27:34 +08001544void f2fs_wait_on_encrypted_page_writeback(struct f2fs_sb_info *sbi,
1545 block_t blkaddr)
1546{
1547 struct page *cpage;
1548
1549 if (blkaddr == NEW_ADDR)
1550 return;
1551
1552 f2fs_bug_on(sbi, blkaddr == NULL_ADDR);
1553
1554 cpage = find_lock_page(META_MAPPING(sbi), blkaddr);
1555 if (cpage) {
Jaegeuk Kimfec1d652016-01-20 23:43:51 +08001556 f2fs_wait_on_page_writeback(cpage, DATA, true);
Chao Yu08b39fb2015-10-08 13:27:34 +08001557 f2fs_put_page(cpage, 1);
1558 }
1559}
1560
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001561static int read_compacted_summaries(struct f2fs_sb_info *sbi)
1562{
1563 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1564 struct curseg_info *seg_i;
1565 unsigned char *kaddr;
1566 struct page *page;
1567 block_t start;
1568 int i, j, offset;
1569
1570 start = start_sum_block(sbi);
1571
1572 page = get_meta_page(sbi, start++);
1573 kaddr = (unsigned char *)page_address(page);
1574
1575 /* Step 1: restore nat cache */
1576 seg_i = CURSEG_I(sbi, CURSEG_HOT_DATA);
Chao Yub7ad7512016-02-19 18:08:46 +08001577 memcpy(seg_i->journal, kaddr, SUM_JOURNAL_SIZE);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001578
1579 /* Step 2: restore sit cache */
1580 seg_i = CURSEG_I(sbi, CURSEG_COLD_DATA);
Chao Yub7ad7512016-02-19 18:08:46 +08001581 memcpy(seg_i->journal, kaddr + SUM_JOURNAL_SIZE, SUM_JOURNAL_SIZE);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001582 offset = 2 * SUM_JOURNAL_SIZE;
1583
1584 /* Step 3: restore summary entries */
1585 for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) {
1586 unsigned short blk_off;
1587 unsigned int segno;
1588
1589 seg_i = CURSEG_I(sbi, i);
1590 segno = le32_to_cpu(ckpt->cur_data_segno[i]);
1591 blk_off = le16_to_cpu(ckpt->cur_data_blkoff[i]);
1592 seg_i->next_segno = segno;
1593 reset_curseg(sbi, i, 0);
1594 seg_i->alloc_type = ckpt->alloc_type[i];
1595 seg_i->next_blkoff = blk_off;
1596
1597 if (seg_i->alloc_type == SSR)
1598 blk_off = sbi->blocks_per_seg;
1599
1600 for (j = 0; j < blk_off; j++) {
1601 struct f2fs_summary *s;
1602 s = (struct f2fs_summary *)(kaddr + offset);
1603 seg_i->sum_blk->entries[j] = *s;
1604 offset += SUMMARY_SIZE;
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +03001605 if (offset + SUMMARY_SIZE <= PAGE_SIZE -
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001606 SUM_FOOTER_SIZE)
1607 continue;
1608
1609 f2fs_put_page(page, 1);
1610 page = NULL;
1611
1612 page = get_meta_page(sbi, start++);
1613 kaddr = (unsigned char *)page_address(page);
1614 offset = 0;
1615 }
1616 }
1617 f2fs_put_page(page, 1);
1618 return 0;
1619}
1620
1621static int read_normal_summaries(struct f2fs_sb_info *sbi, int type)
1622{
1623 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1624 struct f2fs_summary_block *sum;
1625 struct curseg_info *curseg;
1626 struct page *new;
1627 unsigned short blk_off;
1628 unsigned int segno = 0;
1629 block_t blk_addr = 0;
1630
1631 /* get segment number and block addr */
1632 if (IS_DATASEG(type)) {
1633 segno = le32_to_cpu(ckpt->cur_data_segno[type]);
1634 blk_off = le16_to_cpu(ckpt->cur_data_blkoff[type -
1635 CURSEG_HOT_DATA]);
Jaegeuk Kim119ee912015-01-29 11:45:33 -08001636 if (__exist_node_summaries(sbi))
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001637 blk_addr = sum_blk_addr(sbi, NR_CURSEG_TYPE, type);
1638 else
1639 blk_addr = sum_blk_addr(sbi, NR_CURSEG_DATA_TYPE, type);
1640 } else {
1641 segno = le32_to_cpu(ckpt->cur_node_segno[type -
1642 CURSEG_HOT_NODE]);
1643 blk_off = le16_to_cpu(ckpt->cur_node_blkoff[type -
1644 CURSEG_HOT_NODE]);
Jaegeuk Kim119ee912015-01-29 11:45:33 -08001645 if (__exist_node_summaries(sbi))
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001646 blk_addr = sum_blk_addr(sbi, NR_CURSEG_NODE_TYPE,
1647 type - CURSEG_HOT_NODE);
1648 else
1649 blk_addr = GET_SUM_BLOCK(sbi, segno);
1650 }
1651
1652 new = get_meta_page(sbi, blk_addr);
1653 sum = (struct f2fs_summary_block *)page_address(new);
1654
1655 if (IS_NODESEG(type)) {
Jaegeuk Kim119ee912015-01-29 11:45:33 -08001656 if (__exist_node_summaries(sbi)) {
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001657 struct f2fs_summary *ns = &sum->entries[0];
1658 int i;
1659 for (i = 0; i < sbi->blocks_per_seg; i++, ns++) {
1660 ns->version = 0;
1661 ns->ofs_in_node = 0;
1662 }
1663 } else {
Gu Zhengd6537882014-03-07 18:43:36 +08001664 int err;
1665
1666 err = restore_node_summary(sbi, segno, sum);
1667 if (err) {
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001668 f2fs_put_page(new, 1);
Gu Zhengd6537882014-03-07 18:43:36 +08001669 return err;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001670 }
1671 }
1672 }
1673
1674 /* set uncompleted segment to curseg */
1675 curseg = CURSEG_I(sbi, type);
1676 mutex_lock(&curseg->curseg_mutex);
Chao Yub7ad7512016-02-19 18:08:46 +08001677
1678 /* update journal info */
1679 down_write(&curseg->journal_rwsem);
1680 memcpy(curseg->journal, &sum->journal, SUM_JOURNAL_SIZE);
1681 up_write(&curseg->journal_rwsem);
1682
1683 memcpy(curseg->sum_blk->entries, sum->entries, SUM_ENTRY_SIZE);
1684 memcpy(&curseg->sum_blk->footer, &sum->footer, SUM_FOOTER_SIZE);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001685 curseg->next_segno = segno;
1686 reset_curseg(sbi, type, 0);
1687 curseg->alloc_type = ckpt->alloc_type[type];
1688 curseg->next_blkoff = blk_off;
1689 mutex_unlock(&curseg->curseg_mutex);
1690 f2fs_put_page(new, 1);
1691 return 0;
1692}
1693
1694static int restore_curseg_summaries(struct f2fs_sb_info *sbi)
1695{
1696 int type = CURSEG_HOT_DATA;
Chao Yue4fc5fb2014-03-17 16:36:24 +08001697 int err;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001698
Jaegeuk Kim25ca9232012-11-28 16:12:41 +09001699 if (is_set_ckpt_flags(F2FS_CKPT(sbi), CP_COMPACT_SUM_FLAG)) {
Chao Yu3fa06d72014-12-09 14:21:46 +08001700 int npages = npages_for_summary_flush(sbi, true);
1701
1702 if (npages >= 2)
1703 ra_meta_pages(sbi, start_sum_block(sbi), npages,
Chao Yu26879fb2015-10-12 17:05:59 +08001704 META_CP, true);
Chao Yu3fa06d72014-12-09 14:21:46 +08001705
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001706 /* restore for compacted data summary */
1707 if (read_compacted_summaries(sbi))
1708 return -EINVAL;
1709 type = CURSEG_HOT_NODE;
1710 }
1711
Jaegeuk Kim119ee912015-01-29 11:45:33 -08001712 if (__exist_node_summaries(sbi))
Chao Yu3fa06d72014-12-09 14:21:46 +08001713 ra_meta_pages(sbi, sum_blk_addr(sbi, NR_CURSEG_TYPE, type),
Chao Yu26879fb2015-10-12 17:05:59 +08001714 NR_CURSEG_TYPE - type, META_CP, true);
Chao Yu3fa06d72014-12-09 14:21:46 +08001715
Chao Yue4fc5fb2014-03-17 16:36:24 +08001716 for (; type <= CURSEG_COLD_NODE; type++) {
1717 err = read_normal_summaries(sbi, type);
1718 if (err)
1719 return err;
1720 }
1721
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001722 return 0;
1723}
1724
1725static void write_compacted_summaries(struct f2fs_sb_info *sbi, block_t blkaddr)
1726{
1727 struct page *page;
1728 unsigned char *kaddr;
1729 struct f2fs_summary *summary;
1730 struct curseg_info *seg_i;
1731 int written_size = 0;
1732 int i, j;
1733
1734 page = grab_meta_page(sbi, blkaddr++);
1735 kaddr = (unsigned char *)page_address(page);
1736
1737 /* Step 1: write nat cache */
1738 seg_i = CURSEG_I(sbi, CURSEG_HOT_DATA);
Chao Yub7ad7512016-02-19 18:08:46 +08001739 memcpy(kaddr, seg_i->journal, SUM_JOURNAL_SIZE);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001740 written_size += SUM_JOURNAL_SIZE;
1741
1742 /* Step 2: write sit cache */
1743 seg_i = CURSEG_I(sbi, CURSEG_COLD_DATA);
Chao Yub7ad7512016-02-19 18:08:46 +08001744 memcpy(kaddr + written_size, seg_i->journal, SUM_JOURNAL_SIZE);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001745 written_size += SUM_JOURNAL_SIZE;
1746
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001747 /* Step 3: write summary entries */
1748 for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) {
1749 unsigned short blkoff;
1750 seg_i = CURSEG_I(sbi, i);
1751 if (sbi->ckpt->alloc_type[i] == SSR)
1752 blkoff = sbi->blocks_per_seg;
1753 else
1754 blkoff = curseg_blkoff(sbi, i);
1755
1756 for (j = 0; j < blkoff; j++) {
1757 if (!page) {
1758 page = grab_meta_page(sbi, blkaddr++);
1759 kaddr = (unsigned char *)page_address(page);
1760 written_size = 0;
1761 }
1762 summary = (struct f2fs_summary *)(kaddr + written_size);
1763 *summary = seg_i->sum_blk->entries[j];
1764 written_size += SUMMARY_SIZE;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001765
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +03001766 if (written_size + SUMMARY_SIZE <= PAGE_SIZE -
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001767 SUM_FOOTER_SIZE)
1768 continue;
1769
Chao Yue8d61a72013-10-24 15:08:28 +08001770 set_page_dirty(page);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001771 f2fs_put_page(page, 1);
1772 page = NULL;
1773 }
1774 }
Chao Yue8d61a72013-10-24 15:08:28 +08001775 if (page) {
1776 set_page_dirty(page);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001777 f2fs_put_page(page, 1);
Chao Yue8d61a72013-10-24 15:08:28 +08001778 }
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001779}
1780
1781static void write_normal_summaries(struct f2fs_sb_info *sbi,
1782 block_t blkaddr, int type)
1783{
1784 int i, end;
1785 if (IS_DATASEG(type))
1786 end = type + NR_CURSEG_DATA_TYPE;
1787 else
1788 end = type + NR_CURSEG_NODE_TYPE;
1789
Chao Yub7ad7512016-02-19 18:08:46 +08001790 for (i = type; i < end; i++)
1791 write_current_sum_page(sbi, i, blkaddr + (i - type));
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001792}
1793
1794void write_data_summaries(struct f2fs_sb_info *sbi, block_t start_blk)
1795{
Jaegeuk Kim25ca9232012-11-28 16:12:41 +09001796 if (is_set_ckpt_flags(F2FS_CKPT(sbi), CP_COMPACT_SUM_FLAG))
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001797 write_compacted_summaries(sbi, start_blk);
1798 else
1799 write_normal_summaries(sbi, start_blk, CURSEG_HOT_DATA);
1800}
1801
1802void write_node_summaries(struct f2fs_sb_info *sbi, block_t start_blk)
1803{
Jaegeuk Kim119ee912015-01-29 11:45:33 -08001804 write_normal_summaries(sbi, start_blk, CURSEG_HOT_NODE);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001805}
1806
Chao Yudfc08a12016-02-14 18:50:40 +08001807int lookup_journal_in_cursum(struct f2fs_journal *journal, int type,
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001808 unsigned int val, int alloc)
1809{
1810 int i;
1811
1812 if (type == NAT_JOURNAL) {
Chao Yudfc08a12016-02-14 18:50:40 +08001813 for (i = 0; i < nats_in_cursum(journal); i++) {
1814 if (le32_to_cpu(nid_in_journal(journal, i)) == val)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001815 return i;
1816 }
Chao Yudfc08a12016-02-14 18:50:40 +08001817 if (alloc && __has_cursum_space(journal, 1, NAT_JOURNAL))
1818 return update_nats_in_cursum(journal, 1);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001819 } else if (type == SIT_JOURNAL) {
Chao Yudfc08a12016-02-14 18:50:40 +08001820 for (i = 0; i < sits_in_cursum(journal); i++)
1821 if (le32_to_cpu(segno_in_journal(journal, i)) == val)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001822 return i;
Chao Yudfc08a12016-02-14 18:50:40 +08001823 if (alloc && __has_cursum_space(journal, 1, SIT_JOURNAL))
1824 return update_sits_in_cursum(journal, 1);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001825 }
1826 return -1;
1827}
1828
1829static struct page *get_current_sit_page(struct f2fs_sb_info *sbi,
1830 unsigned int segno)
1831{
Gu Zheng2cc22182014-10-20 17:45:49 +08001832 return get_meta_page(sbi, current_sit_addr(sbi, segno));
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001833}
1834
1835static struct page *get_next_sit_page(struct f2fs_sb_info *sbi,
1836 unsigned int start)
1837{
1838 struct sit_info *sit_i = SIT_I(sbi);
1839 struct page *src_page, *dst_page;
1840 pgoff_t src_off, dst_off;
1841 void *src_addr, *dst_addr;
1842
1843 src_off = current_sit_addr(sbi, start);
1844 dst_off = next_sit_addr(sbi, src_off);
1845
1846 /* get current sit block page without lock */
1847 src_page = get_meta_page(sbi, src_off);
1848 dst_page = grab_meta_page(sbi, dst_off);
Jaegeuk Kim9850cf42014-09-02 15:52:58 -07001849 f2fs_bug_on(sbi, PageDirty(src_page));
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001850
1851 src_addr = page_address(src_page);
1852 dst_addr = page_address(dst_page);
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +03001853 memcpy(dst_addr, src_addr, PAGE_SIZE);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001854
1855 set_page_dirty(dst_page);
1856 f2fs_put_page(src_page, 1);
1857
1858 set_to_next_sit(sit_i, start);
1859
1860 return dst_page;
1861}
1862
Chao Yu184a5cd2014-09-04 18:13:01 +08001863static struct sit_entry_set *grab_sit_entry_set(void)
1864{
1865 struct sit_entry_set *ses =
Jaegeuk Kim80c54502015-08-20 08:51:56 -07001866 f2fs_kmem_cache_alloc(sit_entry_set_slab, GFP_NOFS);
Chao Yu184a5cd2014-09-04 18:13:01 +08001867
1868 ses->entry_cnt = 0;
1869 INIT_LIST_HEAD(&ses->set_list);
1870 return ses;
1871}
1872
1873static void release_sit_entry_set(struct sit_entry_set *ses)
1874{
1875 list_del(&ses->set_list);
1876 kmem_cache_free(sit_entry_set_slab, ses);
1877}
1878
1879static void adjust_sit_entry_set(struct sit_entry_set *ses,
1880 struct list_head *head)
1881{
1882 struct sit_entry_set *next = ses;
1883
1884 if (list_is_last(&ses->set_list, head))
1885 return;
1886
1887 list_for_each_entry_continue(next, head, set_list)
1888 if (ses->entry_cnt <= next->entry_cnt)
1889 break;
1890
1891 list_move_tail(&ses->set_list, &next->set_list);
1892}
1893
1894static void add_sit_entry(unsigned int segno, struct list_head *head)
1895{
1896 struct sit_entry_set *ses;
1897 unsigned int start_segno = START_SEGNO(segno);
1898
1899 list_for_each_entry(ses, head, set_list) {
1900 if (ses->start_segno == start_segno) {
1901 ses->entry_cnt++;
1902 adjust_sit_entry_set(ses, head);
1903 return;
1904 }
1905 }
1906
1907 ses = grab_sit_entry_set();
1908
1909 ses->start_segno = start_segno;
1910 ses->entry_cnt++;
1911 list_add(&ses->set_list, head);
1912}
1913
1914static void add_sits_in_set(struct f2fs_sb_info *sbi)
1915{
1916 struct f2fs_sm_info *sm_info = SM_I(sbi);
1917 struct list_head *set_list = &sm_info->sit_entry_set;
1918 unsigned long *bitmap = SIT_I(sbi)->dirty_sentries_bitmap;
Chao Yu184a5cd2014-09-04 18:13:01 +08001919 unsigned int segno;
1920
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07001921 for_each_set_bit(segno, bitmap, MAIN_SEGS(sbi))
Chao Yu184a5cd2014-09-04 18:13:01 +08001922 add_sit_entry(segno, set_list);
1923}
1924
1925static void remove_sits_in_journal(struct f2fs_sb_info *sbi)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001926{
1927 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA);
Chao Yub7ad7512016-02-19 18:08:46 +08001928 struct f2fs_journal *journal = curseg->journal;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001929 int i;
1930
Chao Yub7ad7512016-02-19 18:08:46 +08001931 down_write(&curseg->journal_rwsem);
Chao Yudfc08a12016-02-14 18:50:40 +08001932 for (i = 0; i < sits_in_cursum(journal); i++) {
Chao Yu184a5cd2014-09-04 18:13:01 +08001933 unsigned int segno;
1934 bool dirtied;
1935
Chao Yudfc08a12016-02-14 18:50:40 +08001936 segno = le32_to_cpu(segno_in_journal(journal, i));
Chao Yu184a5cd2014-09-04 18:13:01 +08001937 dirtied = __mark_sit_entry_dirty(sbi, segno);
1938
1939 if (!dirtied)
1940 add_sit_entry(segno, &SM_I(sbi)->sit_entry_set);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001941 }
Chao Yudfc08a12016-02-14 18:50:40 +08001942 update_sits_in_cursum(journal, -i);
Chao Yub7ad7512016-02-19 18:08:46 +08001943 up_write(&curseg->journal_rwsem);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001944}
1945
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +09001946/*
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001947 * CP calls this function, which flushes SIT entries including sit_journal,
1948 * and moves prefree segs to free segs.
1949 */
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -07001950void flush_sit_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001951{
1952 struct sit_info *sit_i = SIT_I(sbi);
1953 unsigned long *bitmap = sit_i->dirty_sentries_bitmap;
1954 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA);
Chao Yub7ad7512016-02-19 18:08:46 +08001955 struct f2fs_journal *journal = curseg->journal;
Chao Yu184a5cd2014-09-04 18:13:01 +08001956 struct sit_entry_set *ses, *tmp;
1957 struct list_head *head = &SM_I(sbi)->sit_entry_set;
Chao Yu184a5cd2014-09-04 18:13:01 +08001958 bool to_journal = true;
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -07001959 struct seg_entry *se;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001960
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001961 mutex_lock(&sit_i->sentry_lock);
1962
Wanpeng Li2b11a742015-02-27 16:52:50 +08001963 if (!sit_i->dirty_sentries)
1964 goto out;
1965
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001966 /*
Chao Yu184a5cd2014-09-04 18:13:01 +08001967 * add and account sit entries of dirty bitmap in sit entry
1968 * set temporarily
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001969 */
Chao Yu184a5cd2014-09-04 18:13:01 +08001970 add_sits_in_set(sbi);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001971
Chao Yu184a5cd2014-09-04 18:13:01 +08001972 /*
1973 * if there are no enough space in journal to store dirty sit
1974 * entries, remove all entries from journal and add and account
1975 * them in sit entry set.
1976 */
Chao Yudfc08a12016-02-14 18:50:40 +08001977 if (!__has_cursum_space(journal, sit_i->dirty_sentries, SIT_JOURNAL))
Chao Yu184a5cd2014-09-04 18:13:01 +08001978 remove_sits_in_journal(sbi);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001979
Chao Yu184a5cd2014-09-04 18:13:01 +08001980 /*
1981 * there are two steps to flush sit entries:
1982 * #1, flush sit entries to journal in current cold data summary block.
1983 * #2, flush sit entries to sit page.
1984 */
1985 list_for_each_entry_safe(ses, tmp, head, set_list) {
Jaegeuk Kim4a257ed2014-10-16 11:43:30 -07001986 struct page *page = NULL;
Chao Yu184a5cd2014-09-04 18:13:01 +08001987 struct f2fs_sit_block *raw_sit = NULL;
1988 unsigned int start_segno = ses->start_segno;
1989 unsigned int end = min(start_segno + SIT_ENTRY_PER_BLOCK,
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07001990 (unsigned long)MAIN_SEGS(sbi));
Chao Yu184a5cd2014-09-04 18:13:01 +08001991 unsigned int segno = start_segno;
Jaegeuk Kimb2955552013-11-12 14:49:56 +09001992
Chao Yu184a5cd2014-09-04 18:13:01 +08001993 if (to_journal &&
Chao Yudfc08a12016-02-14 18:50:40 +08001994 !__has_cursum_space(journal, ses->entry_cnt, SIT_JOURNAL))
Chao Yu184a5cd2014-09-04 18:13:01 +08001995 to_journal = false;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001996
Chao Yub7ad7512016-02-19 18:08:46 +08001997 if (to_journal) {
1998 down_write(&curseg->journal_rwsem);
1999 } else {
Chao Yu184a5cd2014-09-04 18:13:01 +08002000 page = get_next_sit_page(sbi, start_segno);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002001 raw_sit = page_address(page);
2002 }
2003
Chao Yu184a5cd2014-09-04 18:13:01 +08002004 /* flush dirty sit entries in region of current sit set */
2005 for_each_set_bit_from(segno, bitmap, end) {
2006 int offset, sit_offset;
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -07002007
2008 se = get_seg_entry(sbi, segno);
Chao Yu184a5cd2014-09-04 18:13:01 +08002009
2010 /* add discard candidates */
Jaegeuk Kimd7bc2482014-12-12 13:53:41 -08002011 if (cpc->reason != CP_DISCARD) {
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -07002012 cpc->trim_start = segno;
2013 add_discard_addrs(sbi, cpc);
2014 }
Chao Yu184a5cd2014-09-04 18:13:01 +08002015
2016 if (to_journal) {
Chao Yudfc08a12016-02-14 18:50:40 +08002017 offset = lookup_journal_in_cursum(journal,
Chao Yu184a5cd2014-09-04 18:13:01 +08002018 SIT_JOURNAL, segno, 1);
2019 f2fs_bug_on(sbi, offset < 0);
Chao Yudfc08a12016-02-14 18:50:40 +08002020 segno_in_journal(journal, offset) =
Chao Yu184a5cd2014-09-04 18:13:01 +08002021 cpu_to_le32(segno);
2022 seg_info_to_raw_sit(se,
Chao Yudfc08a12016-02-14 18:50:40 +08002023 &sit_in_journal(journal, offset));
Chao Yu184a5cd2014-09-04 18:13:01 +08002024 } else {
2025 sit_offset = SIT_ENTRY_OFFSET(sit_i, segno);
2026 seg_info_to_raw_sit(se,
2027 &raw_sit->entries[sit_offset]);
2028 }
2029
2030 __clear_bit(segno, bitmap);
2031 sit_i->dirty_sentries--;
2032 ses->entry_cnt--;
2033 }
2034
Chao Yub7ad7512016-02-19 18:08:46 +08002035 if (to_journal)
2036 up_write(&curseg->journal_rwsem);
2037 else
Chao Yu184a5cd2014-09-04 18:13:01 +08002038 f2fs_put_page(page, 1);
2039
2040 f2fs_bug_on(sbi, ses->entry_cnt);
2041 release_sit_entry_set(ses);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002042 }
Chao Yu184a5cd2014-09-04 18:13:01 +08002043
2044 f2fs_bug_on(sbi, !list_empty(head));
2045 f2fs_bug_on(sbi, sit_i->dirty_sentries);
Chao Yu184a5cd2014-09-04 18:13:01 +08002046out:
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -07002047 if (cpc->reason == CP_DISCARD) {
2048 for (; cpc->trim_start <= cpc->trim_end; cpc->trim_start++)
2049 add_discard_addrs(sbi, cpc);
2050 }
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002051 mutex_unlock(&sit_i->sentry_lock);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002052
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002053 set_prefree_as_free_segments(sbi);
2054}
2055
2056static int build_sit_info(struct f2fs_sb_info *sbi)
2057{
2058 struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
2059 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
2060 struct sit_info *sit_i;
2061 unsigned int sit_segs, start;
2062 char *src_bitmap, *dst_bitmap;
2063 unsigned int bitmap_size;
2064
2065 /* allocate memory for SIT information */
2066 sit_i = kzalloc(sizeof(struct sit_info), GFP_KERNEL);
2067 if (!sit_i)
2068 return -ENOMEM;
2069
2070 SM_I(sbi)->sit_info = sit_i;
2071
Jaegeuk Kim39307a82015-09-22 13:50:47 -07002072 sit_i->sentries = f2fs_kvzalloc(MAIN_SEGS(sbi) *
2073 sizeof(struct seg_entry), GFP_KERNEL);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002074 if (!sit_i->sentries)
2075 return -ENOMEM;
2076
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07002077 bitmap_size = f2fs_bitmap_size(MAIN_SEGS(sbi));
Jaegeuk Kim39307a82015-09-22 13:50:47 -07002078 sit_i->dirty_sentries_bitmap = f2fs_kvzalloc(bitmap_size, GFP_KERNEL);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002079 if (!sit_i->dirty_sentries_bitmap)
2080 return -ENOMEM;
2081
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07002082 for (start = 0; start < MAIN_SEGS(sbi); start++) {
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002083 sit_i->sentries[start].cur_valid_map
2084 = kzalloc(SIT_VBLOCK_MAP_SIZE, GFP_KERNEL);
2085 sit_i->sentries[start].ckpt_valid_map
2086 = kzalloc(SIT_VBLOCK_MAP_SIZE, GFP_KERNEL);
Jaegeuk Kima66cdd92015-04-30 22:37:50 -07002087 sit_i->sentries[start].discard_map
2088 = kzalloc(SIT_VBLOCK_MAP_SIZE, GFP_KERNEL);
2089 if (!sit_i->sentries[start].cur_valid_map ||
2090 !sit_i->sentries[start].ckpt_valid_map ||
2091 !sit_i->sentries[start].discard_map)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002092 return -ENOMEM;
2093 }
2094
Jaegeuk Kim60a3b782015-02-10 16:44:29 -08002095 sit_i->tmp_map = kzalloc(SIT_VBLOCK_MAP_SIZE, GFP_KERNEL);
2096 if (!sit_i->tmp_map)
2097 return -ENOMEM;
2098
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002099 if (sbi->segs_per_sec > 1) {
Jaegeuk Kim39307a82015-09-22 13:50:47 -07002100 sit_i->sec_entries = f2fs_kvzalloc(MAIN_SECS(sbi) *
2101 sizeof(struct sec_entry), GFP_KERNEL);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002102 if (!sit_i->sec_entries)
2103 return -ENOMEM;
2104 }
2105
2106 /* get information related with SIT */
2107 sit_segs = le32_to_cpu(raw_super->segment_count_sit) >> 1;
2108
2109 /* setup SIT bitmap from ckeckpoint pack */
2110 bitmap_size = __bitmap_size(sbi, SIT_BITMAP);
2111 src_bitmap = __bitmap_ptr(sbi, SIT_BITMAP);
2112
Alexandru Gheorghiu79b57932013-03-28 02:24:53 +02002113 dst_bitmap = kmemdup(src_bitmap, bitmap_size, GFP_KERNEL);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002114 if (!dst_bitmap)
2115 return -ENOMEM;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002116
2117 /* init SIT information */
2118 sit_i->s_ops = &default_salloc_ops;
2119
2120 sit_i->sit_base_addr = le32_to_cpu(raw_super->sit_blkaddr);
2121 sit_i->sit_blocks = sit_segs << sbi->log_blocks_per_seg;
2122 sit_i->written_valid_blocks = le64_to_cpu(ckpt->valid_block_count);
2123 sit_i->sit_bitmap = dst_bitmap;
2124 sit_i->bitmap_size = bitmap_size;
2125 sit_i->dirty_sentries = 0;
2126 sit_i->sents_per_block = SIT_ENTRY_PER_BLOCK;
2127 sit_i->elapsed_time = le64_to_cpu(sbi->ckpt->elapsed_time);
2128 sit_i->mounted_time = CURRENT_TIME_SEC.tv_sec;
2129 mutex_init(&sit_i->sentry_lock);
2130 return 0;
2131}
2132
2133static int build_free_segmap(struct f2fs_sb_info *sbi)
2134{
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002135 struct free_segmap_info *free_i;
2136 unsigned int bitmap_size, sec_bitmap_size;
2137
2138 /* allocate memory for free segmap information */
2139 free_i = kzalloc(sizeof(struct free_segmap_info), GFP_KERNEL);
2140 if (!free_i)
2141 return -ENOMEM;
2142
2143 SM_I(sbi)->free_info = free_i;
2144
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07002145 bitmap_size = f2fs_bitmap_size(MAIN_SEGS(sbi));
Jaegeuk Kim39307a82015-09-22 13:50:47 -07002146 free_i->free_segmap = f2fs_kvmalloc(bitmap_size, GFP_KERNEL);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002147 if (!free_i->free_segmap)
2148 return -ENOMEM;
2149
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07002150 sec_bitmap_size = f2fs_bitmap_size(MAIN_SECS(sbi));
Jaegeuk Kim39307a82015-09-22 13:50:47 -07002151 free_i->free_secmap = f2fs_kvmalloc(sec_bitmap_size, GFP_KERNEL);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002152 if (!free_i->free_secmap)
2153 return -ENOMEM;
2154
2155 /* set all segments as dirty temporarily */
2156 memset(free_i->free_segmap, 0xff, bitmap_size);
2157 memset(free_i->free_secmap, 0xff, sec_bitmap_size);
2158
2159 /* init free segmap information */
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07002160 free_i->start_segno = GET_SEGNO_FROM_SEG0(sbi, MAIN_BLKADDR(sbi));
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002161 free_i->free_segments = 0;
2162 free_i->free_sections = 0;
Chao Yu1a118cc2015-02-11 18:20:38 +08002163 spin_lock_init(&free_i->segmap_lock);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002164 return 0;
2165}
2166
2167static int build_curseg(struct f2fs_sb_info *sbi)
2168{
Namjae Jeon1042d602012-12-01 10:56:13 +09002169 struct curseg_info *array;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002170 int i;
2171
Fabian Frederickb434bab2014-06-23 18:39:15 +02002172 array = kcalloc(NR_CURSEG_TYPE, sizeof(*array), GFP_KERNEL);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002173 if (!array)
2174 return -ENOMEM;
2175
2176 SM_I(sbi)->curseg_array = array;
2177
2178 for (i = 0; i < NR_CURSEG_TYPE; i++) {
2179 mutex_init(&array[i].curseg_mutex);
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +03002180 array[i].sum_blk = kzalloc(PAGE_SIZE, GFP_KERNEL);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002181 if (!array[i].sum_blk)
2182 return -ENOMEM;
Chao Yub7ad7512016-02-19 18:08:46 +08002183 init_rwsem(&array[i].journal_rwsem);
2184 array[i].journal = kzalloc(sizeof(struct f2fs_journal),
2185 GFP_KERNEL);
2186 if (!array[i].journal)
2187 return -ENOMEM;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002188 array[i].segno = NULL_SEGNO;
2189 array[i].next_blkoff = 0;
2190 }
2191 return restore_curseg_summaries(sbi);
2192}
2193
2194static void build_sit_entries(struct f2fs_sb_info *sbi)
2195{
2196 struct sit_info *sit_i = SIT_I(sbi);
2197 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA);
Chao Yub7ad7512016-02-19 18:08:46 +08002198 struct f2fs_journal *journal = curseg->journal;
Chao Yu74de5932013-11-22 09:09:59 +08002199 int sit_blk_cnt = SIT_BLK_CNT(sbi);
2200 unsigned int i, start, end;
2201 unsigned int readed, start_blk = 0;
Chao Yue9f5b8b2016-02-14 18:54:33 +08002202 int nrpages = MAX_BIO_BLOCKS(sbi) * 8;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002203
Chao Yu74de5932013-11-22 09:09:59 +08002204 do {
Chao Yu26879fb2015-10-12 17:05:59 +08002205 readed = ra_meta_pages(sbi, start_blk, nrpages, META_SIT, true);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002206
Chao Yu74de5932013-11-22 09:09:59 +08002207 start = start_blk * sit_i->sents_per_block;
2208 end = (start_blk + readed) * sit_i->sents_per_block;
2209
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07002210 for (; start < end && start < MAIN_SEGS(sbi); start++) {
Chao Yu74de5932013-11-22 09:09:59 +08002211 struct seg_entry *se = &sit_i->sentries[start];
2212 struct f2fs_sit_block *sit_blk;
2213 struct f2fs_sit_entry sit;
2214 struct page *page;
2215
Chao Yub7ad7512016-02-19 18:08:46 +08002216 down_read(&curseg->journal_rwsem);
Chao Yudfc08a12016-02-14 18:50:40 +08002217 for (i = 0; i < sits_in_cursum(journal); i++) {
2218 if (le32_to_cpu(segno_in_journal(journal, i))
Chris Fries6c311ec2014-01-17 14:44:39 -06002219 == start) {
Chao Yudfc08a12016-02-14 18:50:40 +08002220 sit = sit_in_journal(journal, i);
Chao Yub7ad7512016-02-19 18:08:46 +08002221 up_read(&curseg->journal_rwsem);
Chao Yu74de5932013-11-22 09:09:59 +08002222 goto got_it;
2223 }
2224 }
Chao Yub7ad7512016-02-19 18:08:46 +08002225 up_read(&curseg->journal_rwsem);
Chao Yu74de5932013-11-22 09:09:59 +08002226
2227 page = get_current_sit_page(sbi, start);
2228 sit_blk = (struct f2fs_sit_block *)page_address(page);
2229 sit = sit_blk->entries[SIT_ENTRY_OFFSET(sit_i, start)];
2230 f2fs_put_page(page, 1);
2231got_it:
2232 check_block_count(sbi, start, &sit);
2233 seg_info_from_raw_sit(se, &sit);
Jaegeuk Kima66cdd92015-04-30 22:37:50 -07002234
2235 /* build discard map only one time */
2236 memcpy(se->discard_map, se->cur_valid_map, SIT_VBLOCK_MAP_SIZE);
2237 sbi->discard_blks += sbi->blocks_per_seg - se->valid_blocks;
2238
Chao Yu74de5932013-11-22 09:09:59 +08002239 if (sbi->segs_per_sec > 1) {
2240 struct sec_entry *e = get_sec_entry(sbi, start);
2241 e->valid_blocks += se->valid_blocks;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002242 }
2243 }
Chao Yu74de5932013-11-22 09:09:59 +08002244 start_blk += readed;
2245 } while (start_blk < sit_blk_cnt);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002246}
2247
2248static void init_free_segmap(struct f2fs_sb_info *sbi)
2249{
2250 unsigned int start;
2251 int type;
2252
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07002253 for (start = 0; start < MAIN_SEGS(sbi); start++) {
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002254 struct seg_entry *sentry = get_seg_entry(sbi, start);
2255 if (!sentry->valid_blocks)
2256 __set_free(sbi, start);
2257 }
2258
2259 /* set use the current segments */
2260 for (type = CURSEG_HOT_DATA; type <= CURSEG_COLD_NODE; type++) {
2261 struct curseg_info *curseg_t = CURSEG_I(sbi, type);
2262 __set_test_and_inuse(sbi, curseg_t->segno);
2263 }
2264}
2265
2266static void init_dirty_segmap(struct f2fs_sb_info *sbi)
2267{
2268 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
2269 struct free_segmap_info *free_i = FREE_I(sbi);
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07002270 unsigned int segno = 0, offset = 0;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002271 unsigned short valid_blocks;
2272
Namjae Jeon8736fbf2013-06-16 09:49:11 +09002273 while (1) {
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002274 /* find dirty segment based on free segmap */
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07002275 segno = find_next_inuse(free_i, MAIN_SEGS(sbi), offset);
2276 if (segno >= MAIN_SEGS(sbi))
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002277 break;
2278 offset = segno + 1;
2279 valid_blocks = get_valid_blocks(sbi, segno, 0);
Jaegeuk Kimec325b52014-09-02 16:24:11 -07002280 if (valid_blocks == sbi->blocks_per_seg || !valid_blocks)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002281 continue;
Jaegeuk Kimec325b52014-09-02 16:24:11 -07002282 if (valid_blocks > sbi->blocks_per_seg) {
2283 f2fs_bug_on(sbi, 1);
2284 continue;
2285 }
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002286 mutex_lock(&dirty_i->seglist_lock);
2287 __locate_dirty_segment(sbi, segno, DIRTY);
2288 mutex_unlock(&dirty_i->seglist_lock);
2289 }
2290}
2291
Jaegeuk Kim5ec4e492013-03-31 13:26:03 +09002292static int init_victim_secmap(struct f2fs_sb_info *sbi)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002293{
2294 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07002295 unsigned int bitmap_size = f2fs_bitmap_size(MAIN_SECS(sbi));
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002296
Jaegeuk Kim39307a82015-09-22 13:50:47 -07002297 dirty_i->victim_secmap = f2fs_kvzalloc(bitmap_size, GFP_KERNEL);
Jaegeuk Kim5ec4e492013-03-31 13:26:03 +09002298 if (!dirty_i->victim_secmap)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002299 return -ENOMEM;
2300 return 0;
2301}
2302
2303static int build_dirty_segmap(struct f2fs_sb_info *sbi)
2304{
2305 struct dirty_seglist_info *dirty_i;
2306 unsigned int bitmap_size, i;
2307
2308 /* allocate memory for dirty segments list information */
2309 dirty_i = kzalloc(sizeof(struct dirty_seglist_info), GFP_KERNEL);
2310 if (!dirty_i)
2311 return -ENOMEM;
2312
2313 SM_I(sbi)->dirty_info = dirty_i;
2314 mutex_init(&dirty_i->seglist_lock);
2315
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07002316 bitmap_size = f2fs_bitmap_size(MAIN_SEGS(sbi));
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002317
2318 for (i = 0; i < NR_DIRTY_TYPE; i++) {
Jaegeuk Kim39307a82015-09-22 13:50:47 -07002319 dirty_i->dirty_segmap[i] = f2fs_kvzalloc(bitmap_size, GFP_KERNEL);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002320 if (!dirty_i->dirty_segmap[i])
2321 return -ENOMEM;
2322 }
2323
2324 init_dirty_segmap(sbi);
Jaegeuk Kim5ec4e492013-03-31 13:26:03 +09002325 return init_victim_secmap(sbi);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002326}
2327
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +09002328/*
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002329 * Update min, max modified time for cost-benefit GC algorithm
2330 */
2331static void init_min_max_mtime(struct f2fs_sb_info *sbi)
2332{
2333 struct sit_info *sit_i = SIT_I(sbi);
2334 unsigned int segno;
2335
2336 mutex_lock(&sit_i->sentry_lock);
2337
2338 sit_i->min_mtime = LLONG_MAX;
2339
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07002340 for (segno = 0; segno < MAIN_SEGS(sbi); segno += sbi->segs_per_sec) {
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002341 unsigned int i;
2342 unsigned long long mtime = 0;
2343
2344 for (i = 0; i < sbi->segs_per_sec; i++)
2345 mtime += get_seg_entry(sbi, segno + i)->mtime;
2346
2347 mtime = div_u64(mtime, sbi->segs_per_sec);
2348
2349 if (sit_i->min_mtime > mtime)
2350 sit_i->min_mtime = mtime;
2351 }
2352 sit_i->max_mtime = get_mtime(sbi);
2353 mutex_unlock(&sit_i->sentry_lock);
2354}
2355
2356int build_segment_manager(struct f2fs_sb_info *sbi)
2357{
2358 struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
2359 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
Namjae Jeon1042d602012-12-01 10:56:13 +09002360 struct f2fs_sm_info *sm_info;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002361 int err;
2362
2363 sm_info = kzalloc(sizeof(struct f2fs_sm_info), GFP_KERNEL);
2364 if (!sm_info)
2365 return -ENOMEM;
2366
2367 /* init sm info */
2368 sbi->sm_info = sm_info;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002369 sm_info->seg0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr);
2370 sm_info->main_blkaddr = le32_to_cpu(raw_super->main_blkaddr);
2371 sm_info->segment_count = le32_to_cpu(raw_super->segment_count);
2372 sm_info->reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
2373 sm_info->ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
2374 sm_info->main_segments = le32_to_cpu(raw_super->segment_count_main);
2375 sm_info->ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
Jaegeuk Kim58c41032014-03-19 14:17:21 +09002376 sm_info->rec_prefree_segments = sm_info->main_segments *
2377 DEF_RECLAIM_PREFREE_SEGMENTS / 100;
Jaegeuk Kim9b5f1362014-09-16 18:30:54 -07002378 sm_info->ipu_policy = 1 << F2FS_IPU_FSYNC;
Jaegeuk Kim216fbd62013-11-07 13:13:42 +09002379 sm_info->min_ipu_util = DEF_MIN_IPU_UTIL;
Jaegeuk Kimc1ce1b02014-09-10 16:53:02 -07002380 sm_info->min_fsync_blocks = DEF_MIN_FSYNC_BLOCKS;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002381
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +09002382 INIT_LIST_HEAD(&sm_info->discard_list);
2383 sm_info->nr_discards = 0;
2384 sm_info->max_discards = 0;
2385
Jaegeuk Kimbba681c2015-01-26 17:41:23 -08002386 sm_info->trim_sections = DEF_BATCHED_TRIM_SECTIONS;
2387
Chao Yu184a5cd2014-09-04 18:13:01 +08002388 INIT_LIST_HEAD(&sm_info->sit_entry_set);
2389
Gu Zhengb270ad62014-04-11 17:49:55 +08002390 if (test_opt(sbi, FLUSH_MERGE) && !f2fs_readonly(sbi->sb)) {
Gu Zheng2163d192014-04-27 14:21:33 +08002391 err = create_flush_cmd_control(sbi);
2392 if (err)
Gu Zhenga688b9d9e2014-04-27 14:21:21 +08002393 return err;
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +09002394 }
2395
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002396 err = build_sit_info(sbi);
2397 if (err)
2398 return err;
2399 err = build_free_segmap(sbi);
2400 if (err)
2401 return err;
2402 err = build_curseg(sbi);
2403 if (err)
2404 return err;
2405
2406 /* reinit free segmap based on SIT */
2407 build_sit_entries(sbi);
2408
2409 init_free_segmap(sbi);
2410 err = build_dirty_segmap(sbi);
2411 if (err)
2412 return err;
2413
2414 init_min_max_mtime(sbi);
2415 return 0;
2416}
2417
2418static void discard_dirty_segmap(struct f2fs_sb_info *sbi,
2419 enum dirty_type dirty_type)
2420{
2421 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
2422
2423 mutex_lock(&dirty_i->seglist_lock);
Jaegeuk Kim39307a82015-09-22 13:50:47 -07002424 kvfree(dirty_i->dirty_segmap[dirty_type]);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002425 dirty_i->nr_dirty[dirty_type] = 0;
2426 mutex_unlock(&dirty_i->seglist_lock);
2427}
2428
Jaegeuk Kim5ec4e492013-03-31 13:26:03 +09002429static void destroy_victim_secmap(struct f2fs_sb_info *sbi)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002430{
2431 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
Jaegeuk Kim39307a82015-09-22 13:50:47 -07002432 kvfree(dirty_i->victim_secmap);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002433}
2434
2435static void destroy_dirty_segmap(struct f2fs_sb_info *sbi)
2436{
2437 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
2438 int i;
2439
2440 if (!dirty_i)
2441 return;
2442
2443 /* discard pre-free/dirty segments list */
2444 for (i = 0; i < NR_DIRTY_TYPE; i++)
2445 discard_dirty_segmap(sbi, i);
2446
Jaegeuk Kim5ec4e492013-03-31 13:26:03 +09002447 destroy_victim_secmap(sbi);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002448 SM_I(sbi)->dirty_info = NULL;
2449 kfree(dirty_i);
2450}
2451
2452static void destroy_curseg(struct f2fs_sb_info *sbi)
2453{
2454 struct curseg_info *array = SM_I(sbi)->curseg_array;
2455 int i;
2456
2457 if (!array)
2458 return;
2459 SM_I(sbi)->curseg_array = NULL;
Chao Yub7ad7512016-02-19 18:08:46 +08002460 for (i = 0; i < NR_CURSEG_TYPE; i++) {
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002461 kfree(array[i].sum_blk);
Chao Yub7ad7512016-02-19 18:08:46 +08002462 kfree(array[i].journal);
2463 }
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002464 kfree(array);
2465}
2466
2467static void destroy_free_segmap(struct f2fs_sb_info *sbi)
2468{
2469 struct free_segmap_info *free_i = SM_I(sbi)->free_info;
2470 if (!free_i)
2471 return;
2472 SM_I(sbi)->free_info = NULL;
Jaegeuk Kim39307a82015-09-22 13:50:47 -07002473 kvfree(free_i->free_segmap);
2474 kvfree(free_i->free_secmap);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002475 kfree(free_i);
2476}
2477
2478static void destroy_sit_info(struct f2fs_sb_info *sbi)
2479{
2480 struct sit_info *sit_i = SIT_I(sbi);
2481 unsigned int start;
2482
2483 if (!sit_i)
2484 return;
2485
2486 if (sit_i->sentries) {
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07002487 for (start = 0; start < MAIN_SEGS(sbi); start++) {
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002488 kfree(sit_i->sentries[start].cur_valid_map);
2489 kfree(sit_i->sentries[start].ckpt_valid_map);
Jaegeuk Kima66cdd92015-04-30 22:37:50 -07002490 kfree(sit_i->sentries[start].discard_map);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002491 }
2492 }
Jaegeuk Kim60a3b782015-02-10 16:44:29 -08002493 kfree(sit_i->tmp_map);
2494
Jaegeuk Kim39307a82015-09-22 13:50:47 -07002495 kvfree(sit_i->sentries);
2496 kvfree(sit_i->sec_entries);
2497 kvfree(sit_i->dirty_sentries_bitmap);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002498
2499 SM_I(sbi)->sit_info = NULL;
2500 kfree(sit_i->sit_bitmap);
2501 kfree(sit_i);
2502}
2503
2504void destroy_segment_manager(struct f2fs_sb_info *sbi)
2505{
2506 struct f2fs_sm_info *sm_info = SM_I(sbi);
Gu Zhenga688b9d9e2014-04-27 14:21:21 +08002507
Chao Yu3b03f722013-11-06 09:12:04 +08002508 if (!sm_info)
2509 return;
Gu Zheng2163d192014-04-27 14:21:33 +08002510 destroy_flush_cmd_control(sbi);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002511 destroy_dirty_segmap(sbi);
2512 destroy_curseg(sbi);
2513 destroy_free_segmap(sbi);
2514 destroy_sit_info(sbi);
2515 sbi->sm_info = NULL;
2516 kfree(sm_info);
2517}
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +09002518
2519int __init create_segment_manager_caches(void)
2520{
2521 discard_entry_slab = f2fs_kmem_cache_create("discard_entry",
Gu Zhenge8512d22014-03-07 18:43:28 +08002522 sizeof(struct discard_entry));
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +09002523 if (!discard_entry_slab)
Chao Yu184a5cd2014-09-04 18:13:01 +08002524 goto fail;
2525
2526 sit_entry_set_slab = f2fs_kmem_cache_create("sit_entry_set",
Changman Leec9ee0082014-11-21 15:42:07 +09002527 sizeof(struct sit_entry_set));
Chao Yu184a5cd2014-09-04 18:13:01 +08002528 if (!sit_entry_set_slab)
2529 goto destory_discard_entry;
Jaegeuk Kim88b88a62014-10-06 17:39:50 -07002530
2531 inmem_entry_slab = f2fs_kmem_cache_create("inmem_page_entry",
2532 sizeof(struct inmem_pages));
2533 if (!inmem_entry_slab)
2534 goto destroy_sit_entry_set;
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +09002535 return 0;
Chao Yu184a5cd2014-09-04 18:13:01 +08002536
Jaegeuk Kim88b88a62014-10-06 17:39:50 -07002537destroy_sit_entry_set:
2538 kmem_cache_destroy(sit_entry_set_slab);
Chao Yu184a5cd2014-09-04 18:13:01 +08002539destory_discard_entry:
2540 kmem_cache_destroy(discard_entry_slab);
2541fail:
2542 return -ENOMEM;
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +09002543}
2544
2545void destroy_segment_manager_caches(void)
2546{
Chao Yu184a5cd2014-09-04 18:13:01 +08002547 kmem_cache_destroy(sit_entry_set_slab);
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +09002548 kmem_cache_destroy(discard_entry_slab);
Jaegeuk Kim88b88a62014-10-06 17:39:50 -07002549 kmem_cache_destroy(inmem_entry_slab);
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +09002550}