blob: ff4b7238f36d333c82503626887c4dc118ecb98b [file] [log] [blame]
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +09001/*
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002 * fs/f2fs/segment.c
3 *
4 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
5 * http://www.samsung.com/
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11#include <linux/fs.h>
12#include <linux/f2fs_fs.h>
13#include <linux/bio.h>
14#include <linux/blkdev.h>
Geert Uytterhoeven690e4a32012-12-19 22:19:30 +010015#include <linux/prefetch.h>
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +090016#include <linux/kthread.h>
Chao Yu74de5932013-11-22 09:09:59 +080017#include <linux/swap.h>
Jaegeuk Kim60b99b42015-10-05 14:49:57 -070018#include <linux/timer.h>
Jaegeuk 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 Yu275b66b2016-08-29 23:58:34 +080029static struct kmem_cache *bio_entry_slab;
Chao Yu184a5cd2014-09-04 18:13:01 +080030static struct kmem_cache *sit_entry_set_slab;
Jaegeuk Kim88b88a62014-10-06 17:39:50 -070031static struct kmem_cache *inmem_entry_slab;
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +090032
Jaegeuk Kimf96999c2015-10-20 15:17:19 -070033static unsigned long __reverse_ulong(unsigned char *str)
34{
35 unsigned long tmp = 0;
36 int shift = 24, idx = 0;
37
38#if BITS_PER_LONG == 64
39 shift = 56;
40#endif
41 while (shift >= 0) {
42 tmp |= (unsigned long)str[idx++] << shift;
43 shift -= BITS_PER_BYTE;
44 }
45 return tmp;
46}
47
Changman Lee9a7f1432013-11-15 10:42:51 +090048/*
49 * __reverse_ffs is copied from include/asm-generic/bitops/__ffs.h since
50 * MSB and LSB are reversed in a byte by f2fs_set_bit.
51 */
52static inline unsigned long __reverse_ffs(unsigned long word)
53{
54 int num = 0;
55
56#if BITS_PER_LONG == 64
Jaegeuk Kimf96999c2015-10-20 15:17:19 -070057 if ((word & 0xffffffff00000000UL) == 0)
Changman Lee9a7f1432013-11-15 10:42:51 +090058 num += 32;
Jaegeuk Kimf96999c2015-10-20 15:17:19 -070059 else
Changman Lee9a7f1432013-11-15 10:42:51 +090060 word >>= 32;
Changman Lee9a7f1432013-11-15 10:42:51 +090061#endif
Jaegeuk Kimf96999c2015-10-20 15:17:19 -070062 if ((word & 0xffff0000) == 0)
Changman Lee9a7f1432013-11-15 10:42:51 +090063 num += 16;
Jaegeuk Kimf96999c2015-10-20 15:17:19 -070064 else
Changman Lee9a7f1432013-11-15 10:42:51 +090065 word >>= 16;
Jaegeuk Kimf96999c2015-10-20 15:17:19 -070066
67 if ((word & 0xff00) == 0)
Changman Lee9a7f1432013-11-15 10:42:51 +090068 num += 8;
Jaegeuk Kimf96999c2015-10-20 15:17:19 -070069 else
Changman Lee9a7f1432013-11-15 10:42:51 +090070 word >>= 8;
Jaegeuk Kimf96999c2015-10-20 15:17:19 -070071
Changman Lee9a7f1432013-11-15 10:42:51 +090072 if ((word & 0xf0) == 0)
73 num += 4;
74 else
75 word >>= 4;
Jaegeuk Kimf96999c2015-10-20 15:17:19 -070076
Changman Lee9a7f1432013-11-15 10:42:51 +090077 if ((word & 0xc) == 0)
78 num += 2;
79 else
80 word >>= 2;
Jaegeuk Kimf96999c2015-10-20 15:17:19 -070081
Changman Lee9a7f1432013-11-15 10:42:51 +090082 if ((word & 0x2) == 0)
83 num += 1;
84 return num;
85}
86
87/*
arter97e1c42042014-08-06 23:22:50 +090088 * __find_rev_next(_zero)_bit is copied from lib/find_next_bit.c because
Changman Lee9a7f1432013-11-15 10:42:51 +090089 * f2fs_set_bit makes MSB and LSB reversed in a byte.
Fan Li692223d2015-11-12 08:43:04 +080090 * @size must be integral times of unsigned long.
Changman Lee9a7f1432013-11-15 10:42:51 +090091 * Example:
Jaegeuk Kimf96999c2015-10-20 15:17:19 -070092 * MSB <--> LSB
93 * f2fs_set_bit(0, bitmap) => 1000 0000
94 * f2fs_set_bit(7, bitmap) => 0000 0001
Changman Lee9a7f1432013-11-15 10:42:51 +090095 */
96static unsigned long __find_rev_next_bit(const unsigned long *addr,
97 unsigned long size, unsigned long offset)
98{
99 const unsigned long *p = addr + BIT_WORD(offset);
Fan Li692223d2015-11-12 08:43:04 +0800100 unsigned long result = size;
Changman Lee9a7f1432013-11-15 10:42:51 +0900101 unsigned long tmp;
Changman Lee9a7f1432013-11-15 10:42:51 +0900102
103 if (offset >= size)
104 return size;
105
Fan Li692223d2015-11-12 08:43:04 +0800106 size -= (offset & ~(BITS_PER_LONG - 1));
Changman Lee9a7f1432013-11-15 10:42:51 +0900107 offset %= BITS_PER_LONG;
Changman Lee9a7f1432013-11-15 10:42:51 +0900108
Fan Li692223d2015-11-12 08:43:04 +0800109 while (1) {
110 if (*p == 0)
111 goto pass;
Jaegeuk Kimf96999c2015-10-20 15:17:19 -0700112
Jaegeuk Kimf96999c2015-10-20 15:17:19 -0700113 tmp = __reverse_ulong((unsigned char *)p);
Fan Li692223d2015-11-12 08:43:04 +0800114
115 tmp &= ~0UL >> offset;
116 if (size < BITS_PER_LONG)
117 tmp &= (~0UL << (BITS_PER_LONG - size));
Changman Lee9a7f1432013-11-15 10:42:51 +0900118 if (tmp)
Fan Li692223d2015-11-12 08:43:04 +0800119 goto found;
120pass:
121 if (size <= BITS_PER_LONG)
122 break;
Changman Lee9a7f1432013-11-15 10:42:51 +0900123 size -= BITS_PER_LONG;
Fan Li692223d2015-11-12 08:43:04 +0800124 offset = 0;
Jaegeuk Kimf96999c2015-10-20 15:17:19 -0700125 p++;
Changman Lee9a7f1432013-11-15 10:42:51 +0900126 }
Fan Li692223d2015-11-12 08:43:04 +0800127 return result;
128found:
129 return result - size + __reverse_ffs(tmp);
Changman Lee9a7f1432013-11-15 10:42:51 +0900130}
131
132static unsigned long __find_rev_next_zero_bit(const unsigned long *addr,
133 unsigned long size, unsigned long offset)
134{
135 const unsigned long *p = addr + BIT_WORD(offset);
Jaegeuk Kim80609442015-12-04 16:51:13 -0800136 unsigned long result = size;
Changman Lee9a7f1432013-11-15 10:42:51 +0900137 unsigned long tmp;
Changman Lee9a7f1432013-11-15 10:42:51 +0900138
139 if (offset >= size)
140 return size;
141
Jaegeuk Kim80609442015-12-04 16:51:13 -0800142 size -= (offset & ~(BITS_PER_LONG - 1));
Changman Lee9a7f1432013-11-15 10:42:51 +0900143 offset %= BITS_PER_LONG;
Changman Lee9a7f1432013-11-15 10:42:51 +0900144
Jaegeuk Kim80609442015-12-04 16:51:13 -0800145 while (1) {
146 if (*p == ~0UL)
147 goto pass;
Jaegeuk Kimf96999c2015-10-20 15:17:19 -0700148
Jaegeuk Kimf96999c2015-10-20 15:17:19 -0700149 tmp = __reverse_ulong((unsigned char *)p);
Jaegeuk Kim80609442015-12-04 16:51:13 -0800150
151 if (offset)
152 tmp |= ~0UL << (BITS_PER_LONG - offset);
153 if (size < BITS_PER_LONG)
154 tmp |= ~0UL >> size;
Jaegeuk Kimf96999c2015-10-20 15:17:19 -0700155 if (tmp != ~0UL)
Jaegeuk Kim80609442015-12-04 16:51:13 -0800156 goto found;
157pass:
158 if (size <= BITS_PER_LONG)
159 break;
Changman Lee9a7f1432013-11-15 10:42:51 +0900160 size -= BITS_PER_LONG;
Jaegeuk Kim80609442015-12-04 16:51:13 -0800161 offset = 0;
Jaegeuk Kimf96999c2015-10-20 15:17:19 -0700162 p++;
Changman Lee9a7f1432013-11-15 10:42:51 +0900163 }
Jaegeuk Kim80609442015-12-04 16:51:13 -0800164 return result;
165found:
166 return result - size + __reverse_ffz(tmp);
Changman Lee9a7f1432013-11-15 10:42:51 +0900167}
168
Jaegeuk Kim88b88a62014-10-06 17:39:50 -0700169void register_inmem_page(struct inode *inode, struct page *page)
170{
171 struct f2fs_inode_info *fi = F2FS_I(inode);
172 struct inmem_pages *new;
Jaegeuk Kim9be32d72014-12-05 10:39:49 -0800173
Jaegeuk Kim9e4ded32014-12-17 19:58:58 -0800174 f2fs_trace_pid(page);
Jaegeuk Kim0722b102014-12-05 11:58:02 -0800175
Chao Yudecd36b2015-08-07 18:42:09 +0800176 set_page_private(page, (unsigned long)ATOMIC_WRITTEN_PAGE);
177 SetPagePrivate(page);
178
Jaegeuk Kim88b88a62014-10-06 17:39:50 -0700179 new = f2fs_kmem_cache_alloc(inmem_entry_slab, GFP_NOFS);
180
181 /* add atomic page indices to the list */
182 new->page = page;
183 INIT_LIST_HEAD(&new->list);
Chao Yudecd36b2015-08-07 18:42:09 +0800184
Jaegeuk Kim88b88a62014-10-06 17:39:50 -0700185 /* increase reference count with clean state */
186 mutex_lock(&fi->inmem_lock);
187 get_page(page);
188 list_add_tail(&new->list, &fi->inmem_pages);
Jaegeuk Kim8dcf2ff72014-12-05 17:18:15 -0800189 inc_page_count(F2FS_I_SB(inode), F2FS_INMEM_PAGES);
Jaegeuk Kim88b88a62014-10-06 17:39:50 -0700190 mutex_unlock(&fi->inmem_lock);
Jaegeuk Kim8ce67cb2015-03-17 17:58:08 -0700191
192 trace_f2fs_register_inmem_page(page, INMEM);
Jaegeuk Kim88b88a62014-10-06 17:39:50 -0700193}
194
Chao Yu28bc1062016-02-06 14:40:34 +0800195static int __revoke_inmem_pages(struct inode *inode,
196 struct list_head *head, bool drop, bool recover)
Jaegeuk Kim88b88a62014-10-06 17:39:50 -0700197{
Chao Yu28bc1062016-02-06 14:40:34 +0800198 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
Jaegeuk Kim88b88a62014-10-06 17:39:50 -0700199 struct inmem_pages *cur, *tmp;
Chao Yu28bc1062016-02-06 14:40:34 +0800200 int err = 0;
Jaegeuk Kim88b88a62014-10-06 17:39:50 -0700201
Chao Yu29b96b52016-02-06 14:38:29 +0800202 list_for_each_entry_safe(cur, tmp, head, list) {
Chao Yu28bc1062016-02-06 14:40:34 +0800203 struct page *page = cur->page;
Jaegeuk Kim88b88a62014-10-06 17:39:50 -0700204
Chao Yu28bc1062016-02-06 14:40:34 +0800205 if (drop)
206 trace_f2fs_commit_inmem_page(page, INMEM_DROP);
207
208 lock_page(page);
209
210 if (recover) {
211 struct dnode_of_data dn;
212 struct node_info ni;
213
214 trace_f2fs_commit_inmem_page(page, INMEM_REVOKE);
215
216 set_new_dnode(&dn, inode, NULL, NULL, 0);
217 if (get_dnode_of_data(&dn, page->index, LOOKUP_NODE)) {
218 err = -EAGAIN;
219 goto next;
220 }
221 get_node_info(sbi, dn.nid, &ni);
222 f2fs_replace_block(sbi, &dn, dn.data_blkaddr,
223 cur->old_addr, ni.version, true, true);
224 f2fs_put_dnode(&dn);
225 }
226next:
Jaegeuk Kim63c52d72016-04-12 14:11:03 -0700227 /* we don't need to invalidate this in the sccessful status */
228 if (drop || recover)
229 ClearPageUptodate(page);
Chao Yu28bc1062016-02-06 14:40:34 +0800230 set_page_private(page, 0);
Chao Yuc81ced02016-04-29 20:13:36 +0800231 ClearPagePrivate(page);
Chao Yu28bc1062016-02-06 14:40:34 +0800232 f2fs_put_page(page, 1);
Chao Yudecd36b2015-08-07 18:42:09 +0800233
Jaegeuk Kim88b88a62014-10-06 17:39:50 -0700234 list_del(&cur->list);
235 kmem_cache_free(inmem_entry_slab, cur);
Jaegeuk Kim8dcf2ff72014-12-05 17:18:15 -0800236 dec_page_count(F2FS_I_SB(inode), F2FS_INMEM_PAGES);
Jaegeuk Kim88b88a62014-10-06 17:39:50 -0700237 }
Chao Yu28bc1062016-02-06 14:40:34 +0800238 return err;
Chao Yu29b96b52016-02-06 14:38:29 +0800239}
240
241void drop_inmem_pages(struct inode *inode)
242{
243 struct f2fs_inode_info *fi = F2FS_I(inode);
244
Jaegeuk Kim91942322016-05-20 10:13:22 -0700245 clear_inode_flag(inode, FI_ATOMIC_FILE);
Jaegeuk Kim26dc3d42016-04-11 13:15:10 -0700246
Chao Yu29b96b52016-02-06 14:38:29 +0800247 mutex_lock(&fi->inmem_lock);
Chao Yu28bc1062016-02-06 14:40:34 +0800248 __revoke_inmem_pages(inode, &fi->inmem_pages, true, false);
Chao Yu29b96b52016-02-06 14:38:29 +0800249 mutex_unlock(&fi->inmem_lock);
250}
251
Chao Yu28bc1062016-02-06 14:40:34 +0800252static int __commit_inmem_pages(struct inode *inode,
253 struct list_head *revoke_list)
Chao Yu29b96b52016-02-06 14:38:29 +0800254{
255 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
256 struct f2fs_inode_info *fi = F2FS_I(inode);
257 struct inmem_pages *cur, *tmp;
258 struct f2fs_io_info fio = {
259 .sbi = sbi,
260 .type = DATA,
Mike Christie04d328d2016-06-05 14:31:55 -0500261 .op = REQ_OP_WRITE,
262 .op_flags = WRITE_SYNC | REQ_PRIO,
Chao Yu29b96b52016-02-06 14:38:29 +0800263 .encrypted_page = NULL,
264 };
265 bool submit_bio = false;
266 int err = 0;
267
268 list_for_each_entry_safe(cur, tmp, &fi->inmem_pages, list) {
Chao Yu28bc1062016-02-06 14:40:34 +0800269 struct page *page = cur->page;
270
271 lock_page(page);
272 if (page->mapping == inode->i_mapping) {
273 trace_f2fs_commit_inmem_page(page, INMEM);
274
275 set_page_dirty(page);
276 f2fs_wait_on_page_writeback(page, DATA, true);
277 if (clear_page_dirty_for_io(page))
Chao Yu29b96b52016-02-06 14:38:29 +0800278 inode_dec_dirty_pages(inode);
Chao Yu28bc1062016-02-06 14:40:34 +0800279
280 fio.page = page;
Chao Yu29b96b52016-02-06 14:38:29 +0800281 err = do_write_data_page(&fio);
282 if (err) {
Chao Yu28bc1062016-02-06 14:40:34 +0800283 unlock_page(page);
Chao Yu29b96b52016-02-06 14:38:29 +0800284 break;
285 }
Chao Yu28bc1062016-02-06 14:40:34 +0800286
287 /* record old blkaddr for revoking */
288 cur->old_addr = fio.old_blkaddr;
289
290 clear_cold_data(page);
Chao Yu29b96b52016-02-06 14:38:29 +0800291 submit_bio = true;
292 }
Chao Yu28bc1062016-02-06 14:40:34 +0800293 unlock_page(page);
294 list_move_tail(&cur->list, revoke_list);
Chao Yu29b96b52016-02-06 14:38:29 +0800295 }
296
297 if (submit_bio)
298 f2fs_submit_merged_bio_cond(sbi, inode, NULL, 0, DATA, WRITE);
Chao Yu28bc1062016-02-06 14:40:34 +0800299
300 if (!err)
301 __revoke_inmem_pages(inode, revoke_list, false, false);
302
Chao Yu29b96b52016-02-06 14:38:29 +0800303 return err;
304}
305
306int commit_inmem_pages(struct inode *inode)
307{
308 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
309 struct f2fs_inode_info *fi = F2FS_I(inode);
Chao Yu28bc1062016-02-06 14:40:34 +0800310 struct list_head revoke_list;
311 int err;
Chao Yu29b96b52016-02-06 14:38:29 +0800312
Chao Yu28bc1062016-02-06 14:40:34 +0800313 INIT_LIST_HEAD(&revoke_list);
Chao Yu29b96b52016-02-06 14:38:29 +0800314 f2fs_balance_fs(sbi, true);
315 f2fs_lock_op(sbi);
316
317 mutex_lock(&fi->inmem_lock);
Chao Yu28bc1062016-02-06 14:40:34 +0800318 err = __commit_inmem_pages(inode, &revoke_list);
319 if (err) {
320 int ret;
321 /*
322 * try to revoke all committed pages, but still we could fail
323 * due to no memory or other reason, if that happened, EAGAIN
324 * will be returned, which means in such case, transaction is
325 * already not integrity, caller should use journal to do the
326 * recovery or rewrite & commit last transaction. For other
327 * error number, revoking was done by filesystem itself.
328 */
329 ret = __revoke_inmem_pages(inode, &revoke_list, false, true);
330 if (ret)
331 err = ret;
332
333 /* drop all uncommitted pages */
334 __revoke_inmem_pages(inode, &fi->inmem_pages, true, false);
335 }
Jaegeuk Kim88b88a62014-10-06 17:39:50 -0700336 mutex_unlock(&fi->inmem_lock);
337
Chao Yu29b96b52016-02-06 14:38:29 +0800338 f2fs_unlock_op(sbi);
Jaegeuk Kimedb27de2015-07-25 00:52:52 -0700339 return err;
Jaegeuk Kim88b88a62014-10-06 17:39:50 -0700340}
341
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +0900342/*
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900343 * This function balances dirty node and dentry pages.
344 * In addition, it controls garbage collection.
345 */
Jaegeuk Kim2c4db1a2016-01-07 14:15:04 -0800346void f2fs_balance_fs(struct f2fs_sb_info *sbi, bool need)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900347{
Jaegeuk Kim2c4db1a2016-01-07 14:15:04 -0800348 if (!need)
349 return;
Jaegeuk Kime589c2c2016-06-02 15:24:24 -0700350
351 /* balance_fs_bg is able to be pending */
352 if (excess_cached_nats(sbi))
353 f2fs_balance_fs_bg(sbi);
354
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900355 /*
Jaegeuk Kim029cd282012-12-21 17:20:21 +0900356 * We should do GC or end up with checkpoint, if there are so many dirty
357 * dir/node pages without enough free segments.
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900358 */
Jaegeuk Kim43727522013-02-04 15:11:17 +0900359 if (has_not_enough_free_secs(sbi, 0)) {
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900360 mutex_lock(&sbi->gc_mutex);
Chao Yud530d4d2015-10-05 22:22:44 +0800361 f2fs_gc(sbi, false);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900362 }
363}
364
Jaegeuk Kim4660f9c2013-10-24 14:19:18 +0900365void f2fs_balance_fs_bg(struct f2fs_sb_info *sbi)
366{
Chao Yu1dcc3362015-02-05 17:57:31 +0800367 /* try to shrink extent cache when there is no enough memory */
Jaegeuk Kim554df792015-06-19 13:41:23 -0700368 if (!available_free_memory(sbi, EXTENT_CACHE))
369 f2fs_shrink_extent_tree(sbi, EXTENT_CACHE_SHRINK_NUMBER);
Chao Yu1dcc3362015-02-05 17:57:31 +0800370
Jaegeuk Kim1b38dc82015-06-19 15:36:07 -0700371 /* check the # of cached NAT entries */
372 if (!available_free_memory(sbi, NAT_ENTRIES))
373 try_to_free_nats(sbi, NAT_ENTRY_PER_BLOCK);
374
Chao Yu31696582015-07-28 18:33:46 +0800375 if (!available_free_memory(sbi, FREE_NIDS))
Jaegeuk Kimad4edb82016-06-16 16:41:49 -0700376 try_to_free_nids(sbi, MAX_FREE_NIDS);
377 else
378 build_free_nids(sbi);
Chao Yu31696582015-07-28 18:33:46 +0800379
Jaegeuk Kim1b38dc82015-06-19 15:36:07 -0700380 /* checkpoint is the only way to shrink partial cached entries */
381 if (!available_free_memory(sbi, NAT_ENTRIES) ||
Jaegeuk Kim60b99b42015-10-05 14:49:57 -0700382 !available_free_memory(sbi, INO_ENTRIES) ||
Chao Yu7d768d22016-01-18 18:31:18 +0800383 excess_prefree_segs(sbi) ||
384 excess_dirty_nats(sbi) ||
Jaegeuk Kimd0239e12016-01-08 16:57:48 -0800385 (is_idle(sbi) && f2fs_time_over(sbi, CP_TIME))) {
Chao Yue9f5b8b2016-02-14 18:54:33 +0800386 if (test_opt(sbi, DATA_FLUSH)) {
387 struct blk_plug plug;
388
389 blk_start_plug(&plug);
Chao Yu36b35a02015-12-17 17:13:28 +0800390 sync_dirty_inodes(sbi, FILE_INODE);
Chao Yue9f5b8b2016-02-14 18:54:33 +0800391 blk_finish_plug(&plug);
392 }
Jaegeuk Kim4660f9c2013-10-24 14:19:18 +0900393 f2fs_sync_fs(sbi->sb, true);
Jaegeuk Kim42190d22016-01-09 13:45:17 -0800394 stat_inc_bg_cp_count(sbi->stat_info);
Chao Yu36b35a02015-12-17 17:13:28 +0800395 }
Jaegeuk Kim4660f9c2013-10-24 14:19:18 +0900396}
397
Gu Zheng2163d192014-04-27 14:21:33 +0800398static int issue_flush_thread(void *data)
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900399{
400 struct f2fs_sb_info *sbi = data;
Gu Zhenga688b9d9e2014-04-27 14:21:21 +0800401 struct flush_cmd_control *fcc = SM_I(sbi)->cmd_control_info;
402 wait_queue_head_t *q = &fcc->flush_wait_queue;
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900403repeat:
404 if (kthread_should_stop())
405 return 0;
406
Gu Zheng721bd4d2014-09-05 18:31:00 +0800407 if (!llist_empty(&fcc->issue_list)) {
Jaegeuk Kim740432f2015-08-14 11:43:56 -0700408 struct bio *bio;
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900409 struct flush_cmd *cmd, *next;
410 int ret;
411
Jaegeuk Kim740432f2015-08-14 11:43:56 -0700412 bio = f2fs_bio_alloc(0);
413
Gu Zheng721bd4d2014-09-05 18:31:00 +0800414 fcc->dispatch_list = llist_del_all(&fcc->issue_list);
415 fcc->dispatch_list = llist_reverse_order(fcc->dispatch_list);
416
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900417 bio->bi_bdev = sbi->sb->s_bdev;
Mike Christie04d328d2016-06-05 14:31:55 -0500418 bio_set_op_attrs(bio, REQ_OP_WRITE, WRITE_FLUSH);
Mike Christie4e49ea42016-06-05 14:31:41 -0500419 ret = submit_bio_wait(bio);
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900420
Gu Zheng721bd4d2014-09-05 18:31:00 +0800421 llist_for_each_entry_safe(cmd, next,
422 fcc->dispatch_list, llnode) {
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900423 cmd->ret = ret;
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900424 complete(&cmd->wait);
425 }
Gu Zhenga4ed23f2014-04-11 17:49:35 +0800426 bio_put(bio);
Gu Zhenga688b9d9e2014-04-27 14:21:21 +0800427 fcc->dispatch_list = NULL;
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900428 }
429
Gu Zhenga688b9d9e2014-04-27 14:21:21 +0800430 wait_event_interruptible(*q,
Gu Zheng721bd4d2014-09-05 18:31:00 +0800431 kthread_should_stop() || !llist_empty(&fcc->issue_list));
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900432 goto repeat;
433}
434
435int f2fs_issue_flush(struct f2fs_sb_info *sbi)
436{
Gu Zhenga688b9d9e2014-04-27 14:21:21 +0800437 struct flush_cmd_control *fcc = SM_I(sbi)->cmd_control_info;
Chao Yuadf8d902014-05-08 17:00:35 +0800438 struct flush_cmd cmd;
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900439
Jaegeuk Kim24a9ee02014-07-25 17:46:10 -0700440 trace_f2fs_issue_flush(sbi->sb, test_opt(sbi, NOBARRIER),
441 test_opt(sbi, FLUSH_MERGE));
442
Jaegeuk Kim0f7b2ab2014-07-23 09:57:31 -0700443 if (test_opt(sbi, NOBARRIER))
444 return 0;
445
Jaegeuk Kim0a87f662016-05-23 12:04:56 -0700446 if (!test_opt(sbi, FLUSH_MERGE) || !atomic_read(&fcc->submit_flush)) {
Jaegeuk Kim740432f2015-08-14 11:43:56 -0700447 struct bio *bio = f2fs_bio_alloc(0);
448 int ret;
449
Jaegeuk Kim0a87f662016-05-23 12:04:56 -0700450 atomic_inc(&fcc->submit_flush);
Jaegeuk Kim740432f2015-08-14 11:43:56 -0700451 bio->bi_bdev = sbi->sb->s_bdev;
Mike Christie04d328d2016-06-05 14:31:55 -0500452 bio_set_op_attrs(bio, REQ_OP_WRITE, WRITE_FLUSH);
Mike Christie4e49ea42016-06-05 14:31:41 -0500453 ret = submit_bio_wait(bio);
Jaegeuk Kim0a87f662016-05-23 12:04:56 -0700454 atomic_dec(&fcc->submit_flush);
Jaegeuk Kim740432f2015-08-14 11:43:56 -0700455 bio_put(bio);
456 return ret;
457 }
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900458
Chao Yuadf8d902014-05-08 17:00:35 +0800459 init_completion(&cmd.wait);
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900460
Jaegeuk Kim0a87f662016-05-23 12:04:56 -0700461 atomic_inc(&fcc->submit_flush);
Gu Zheng721bd4d2014-09-05 18:31:00 +0800462 llist_add(&cmd.llnode, &fcc->issue_list);
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900463
Gu Zhenga688b9d9e2014-04-27 14:21:21 +0800464 if (!fcc->dispatch_list)
465 wake_up(&fcc->flush_wait_queue);
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900466
Chao Yuadf8d902014-05-08 17:00:35 +0800467 wait_for_completion(&cmd.wait);
Jaegeuk Kim0a87f662016-05-23 12:04:56 -0700468 atomic_dec(&fcc->submit_flush);
Chao Yuadf8d902014-05-08 17:00:35 +0800469
470 return cmd.ret;
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900471}
472
Gu Zheng2163d192014-04-27 14:21:33 +0800473int create_flush_cmd_control(struct f2fs_sb_info *sbi)
474{
475 dev_t dev = sbi->sb->s_bdev->bd_dev;
476 struct flush_cmd_control *fcc;
477 int err = 0;
478
479 fcc = kzalloc(sizeof(struct flush_cmd_control), GFP_KERNEL);
480 if (!fcc)
481 return -ENOMEM;
Jaegeuk Kim0a87f662016-05-23 12:04:56 -0700482 atomic_set(&fcc->submit_flush, 0);
Gu Zheng2163d192014-04-27 14:21:33 +0800483 init_waitqueue_head(&fcc->flush_wait_queue);
Gu Zheng721bd4d2014-09-05 18:31:00 +0800484 init_llist_head(&fcc->issue_list);
Chao Yu6b2920a2014-07-07 11:21:59 +0800485 SM_I(sbi)->cmd_control_info = fcc;
Gu Zheng2163d192014-04-27 14:21:33 +0800486 fcc->f2fs_issue_flush = kthread_run(issue_flush_thread, sbi,
487 "f2fs_flush-%u:%u", MAJOR(dev), MINOR(dev));
488 if (IS_ERR(fcc->f2fs_issue_flush)) {
489 err = PTR_ERR(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 return err;
493 }
Gu Zheng2163d192014-04-27 14:21:33 +0800494
495 return err;
496}
497
498void destroy_flush_cmd_control(struct f2fs_sb_info *sbi)
499{
Chao Yu6b2920a2014-07-07 11:21:59 +0800500 struct flush_cmd_control *fcc = SM_I(sbi)->cmd_control_info;
Gu Zheng2163d192014-04-27 14:21:33 +0800501
502 if (fcc && fcc->f2fs_issue_flush)
503 kthread_stop(fcc->f2fs_issue_flush);
504 kfree(fcc);
Chao Yu6b2920a2014-07-07 11:21:59 +0800505 SM_I(sbi)->cmd_control_info = NULL;
Gu Zheng2163d192014-04-27 14:21:33 +0800506}
507
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900508static void __locate_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno,
509 enum dirty_type dirty_type)
510{
511 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
512
513 /* need not be added */
514 if (IS_CURSEG(sbi, segno))
515 return;
516
517 if (!test_and_set_bit(segno, dirty_i->dirty_segmap[dirty_type]))
518 dirty_i->nr_dirty[dirty_type]++;
519
520 if (dirty_type == DIRTY) {
521 struct seg_entry *sentry = get_seg_entry(sbi, segno);
Changman Lee4625d6a2013-10-25 17:31:57 +0900522 enum dirty_type t = sentry->type;
Jaegeuk Kimb2f2c392013-04-01 13:52:09 +0900523
Jaegeuk Kimec325b52014-09-02 16:24:11 -0700524 if (unlikely(t >= DIRTY)) {
525 f2fs_bug_on(sbi, 1);
526 return;
527 }
Changman Lee4625d6a2013-10-25 17:31:57 +0900528 if (!test_and_set_bit(segno, dirty_i->dirty_segmap[t]))
529 dirty_i->nr_dirty[t]++;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900530 }
531}
532
533static void __remove_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno,
534 enum dirty_type dirty_type)
535{
536 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
537
538 if (test_and_clear_bit(segno, dirty_i->dirty_segmap[dirty_type]))
539 dirty_i->nr_dirty[dirty_type]--;
540
541 if (dirty_type == DIRTY) {
Changman Lee4625d6a2013-10-25 17:31:57 +0900542 struct seg_entry *sentry = get_seg_entry(sbi, segno);
543 enum dirty_type t = sentry->type;
Jaegeuk Kimb2f2c392013-04-01 13:52:09 +0900544
Changman Lee4625d6a2013-10-25 17:31:57 +0900545 if (test_and_clear_bit(segno, dirty_i->dirty_segmap[t]))
546 dirty_i->nr_dirty[t]--;
Jaegeuk Kimb2f2c392013-04-01 13:52:09 +0900547
Jaegeuk Kim5ec4e492013-03-31 13:26:03 +0900548 if (get_valid_blocks(sbi, segno, sbi->segs_per_sec) == 0)
549 clear_bit(GET_SECNO(sbi, segno),
550 dirty_i->victim_secmap);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900551 }
552}
553
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +0900554/*
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900555 * Should not occur error such as -ENOMEM.
556 * Adding dirty entry into seglist is not critical operation.
557 * If a given segment is one of current working segments, it won't be added.
558 */
Haicheng Li8d8451a2013-06-13 16:59:28 +0800559static void locate_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900560{
561 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
562 unsigned short valid_blocks;
563
564 if (segno == NULL_SEGNO || IS_CURSEG(sbi, segno))
565 return;
566
567 mutex_lock(&dirty_i->seglist_lock);
568
569 valid_blocks = get_valid_blocks(sbi, segno, 0);
570
571 if (valid_blocks == 0) {
572 __locate_dirty_segment(sbi, segno, PRE);
573 __remove_dirty_segment(sbi, segno, DIRTY);
574 } else if (valid_blocks < sbi->blocks_per_seg) {
575 __locate_dirty_segment(sbi, segno, DIRTY);
576 } else {
577 /* Recovery routine with SSR needs this */
578 __remove_dirty_segment(sbi, segno, DIRTY);
579 }
580
581 mutex_unlock(&dirty_i->seglist_lock);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900582}
583
Chao Yu275b66b2016-08-29 23:58:34 +0800584static struct bio_entry *__add_bio_entry(struct f2fs_sb_info *sbi,
585 struct bio *bio)
586{
587 struct list_head *wait_list = &(SM_I(sbi)->wait_list);
588 struct bio_entry *be = f2fs_kmem_cache_alloc(bio_entry_slab, GFP_NOFS);
589
590 INIT_LIST_HEAD(&be->list);
591 be->bio = bio;
592 init_completion(&be->event);
593 list_add_tail(&be->list, wait_list);
594
595 return be;
596}
597
598void f2fs_wait_all_discard_bio(struct f2fs_sb_info *sbi)
599{
600 struct list_head *wait_list = &(SM_I(sbi)->wait_list);
601 struct bio_entry *be, *tmp;
602
603 list_for_each_entry_safe(be, tmp, wait_list, list) {
604 struct bio *bio = be->bio;
605 int err;
606
607 wait_for_completion_io(&be->event);
608 err = be->error;
609 if (err == -EOPNOTSUPP)
610 err = 0;
611
612 if (err)
613 f2fs_msg(sbi->sb, KERN_INFO,
614 "Issue discard failed, ret: %d", err);
615
616 bio_put(bio);
617 list_del(&be->list);
618 kmem_cache_free(bio_entry_slab, be);
619 }
620}
621
622static void f2fs_submit_bio_wait_endio(struct bio *bio)
623{
624 struct bio_entry *be = (struct bio_entry *)bio->bi_private;
625
626 be->error = bio->bi_error;
627 complete(&be->event);
628}
629
630/* this function is copied from blkdev_issue_discard from block/blk-lib.c */
631int __f2fs_issue_discard_async(struct f2fs_sb_info *sbi, sector_t sector,
632 sector_t nr_sects, gfp_t gfp_mask, unsigned long flags)
633{
634 struct block_device *bdev = sbi->sb->s_bdev;
635 struct bio *bio = NULL;
636 int err;
637
638 err = __blkdev_issue_discard(bdev, sector, nr_sects, gfp_mask, flags,
639 &bio);
640 if (!err && bio) {
641 struct bio_entry *be = __add_bio_entry(sbi, bio);
642
643 bio->bi_private = be;
644 bio->bi_end_io = f2fs_submit_bio_wait_endio;
645 bio->bi_opf |= REQ_SYNC;
646 submit_bio(bio);
647 }
648
649 return err;
650}
651
Jaegeuk Kim1e87a782014-04-15 13:57:55 +0900652static int f2fs_issue_discard(struct f2fs_sb_info *sbi,
Jaegeuk Kim37208872013-11-12 16:55:17 +0900653 block_t blkstart, block_t blklen)
654{
Chao Yu55cf9cb2014-09-15 18:01:10 +0800655 sector_t start = SECTOR_FROM_BLOCK(blkstart);
656 sector_t len = SECTOR_FROM_BLOCK(blklen);
Jaegeuk Kima66cdd92015-04-30 22:37:50 -0700657 struct seg_entry *se;
658 unsigned int offset;
659 block_t i;
660
661 for (i = blkstart; i < blkstart + blklen; i++) {
662 se = get_seg_entry(sbi, GET_SEGNO(sbi, i));
663 offset = GET_BLKOFF_FROM_SEG0(sbi, i);
664
665 if (!f2fs_test_and_set_bit(offset, se->discard_map))
666 sbi->discard_blks--;
667 }
Jaegeuk Kim1661d072013-11-12 17:01:00 +0900668 trace_f2fs_issue_discard(sbi->sb, blkstart, blklen);
Chao Yu275b66b2016-08-29 23:58:34 +0800669 return __f2fs_issue_discard_async(sbi, start, len, GFP_NOFS, 0);
Jaegeuk Kim1e87a782014-04-15 13:57:55 +0900670}
671
Chao Yue90c2d22015-07-28 18:36:47 +0800672bool discard_next_dnode(struct f2fs_sb_info *sbi, block_t blkaddr)
Jaegeuk Kim1e87a782014-04-15 13:57:55 +0900673{
Jaegeuk Kim60b286c2016-02-09 10:24:31 -0800674 int err = -EOPNOTSUPP;
Jaegeuk Kim40a02be2015-05-11 20:03:49 -0700675
676 if (test_opt(sbi, DISCARD)) {
677 struct seg_entry *se = get_seg_entry(sbi,
678 GET_SEGNO(sbi, blkaddr));
679 unsigned int offset = GET_BLKOFF_FROM_SEG0(sbi, blkaddr);
680
681 if (f2fs_test_bit(offset, se->discard_map))
Chao Yue90c2d22015-07-28 18:36:47 +0800682 return false;
Jaegeuk Kim40a02be2015-05-11 20:03:49 -0700683
684 err = f2fs_issue_discard(sbi, blkaddr, 1);
685 }
686
Chao Yue90c2d22015-07-28 18:36:47 +0800687 if (err) {
Chao Yu381722d2015-05-19 17:40:04 +0800688 update_meta_page(sbi, NULL, blkaddr);
Chao Yue90c2d22015-07-28 18:36:47 +0800689 return true;
690 }
691 return false;
Jaegeuk Kim37208872013-11-12 16:55:17 +0900692}
693
Jaegeuk Kimadf49832014-10-28 22:27:59 -0700694static void __add_discard_entry(struct f2fs_sb_info *sbi,
Jaegeuk Kima66cdd92015-04-30 22:37:50 -0700695 struct cp_control *cpc, struct seg_entry *se,
696 unsigned int start, unsigned int end)
Jaegeuk Kimb2955552013-11-12 14:49:56 +0900697{
698 struct list_head *head = &SM_I(sbi)->discard_list;
Jaegeuk Kimadf49832014-10-28 22:27:59 -0700699 struct discard_entry *new, *last;
700
701 if (!list_empty(head)) {
702 last = list_last_entry(head, struct discard_entry, list);
703 if (START_BLOCK(sbi, cpc->trim_start) + start ==
704 last->blkaddr + last->len) {
705 last->len += end - start;
706 goto done;
707 }
708 }
709
710 new = f2fs_kmem_cache_alloc(discard_entry_slab, GFP_NOFS);
711 INIT_LIST_HEAD(&new->list);
712 new->blkaddr = START_BLOCK(sbi, cpc->trim_start) + start;
713 new->len = end - start;
714 list_add_tail(&new->list, head);
715done:
716 SM_I(sbi)->nr_discards += end - start;
Jaegeuk Kimadf49832014-10-28 22:27:59 -0700717}
718
719static void add_discard_addrs(struct f2fs_sb_info *sbi, struct cp_control *cpc)
720{
Jaegeuk Kimb2955552013-11-12 14:49:56 +0900721 int entries = SIT_VBLOCK_MAP_SIZE / sizeof(unsigned long);
722 int max_blocks = sbi->blocks_per_seg;
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -0700723 struct seg_entry *se = get_seg_entry(sbi, cpc->trim_start);
Jaegeuk Kimb2955552013-11-12 14:49:56 +0900724 unsigned long *cur_map = (unsigned long *)se->cur_valid_map;
725 unsigned long *ckpt_map = (unsigned long *)se->ckpt_valid_map;
Jaegeuk Kima66cdd92015-04-30 22:37:50 -0700726 unsigned long *discard_map = (unsigned long *)se->discard_map;
Jaegeuk Kim60a3b782015-02-10 16:44:29 -0800727 unsigned long *dmap = SIT_I(sbi)->tmp_map;
Jaegeuk Kimb2955552013-11-12 14:49:56 +0900728 unsigned int start = 0, end = -1;
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -0700729 bool force = (cpc->reason == CP_DISCARD);
Jaegeuk Kimb2955552013-11-12 14:49:56 +0900730 int i;
731
Jaegeuk Kim3e025742016-08-02 10:56:40 -0700732 if (se->valid_blocks == max_blocks || !f2fs_discard_en(sbi))
Jaegeuk Kimb2955552013-11-12 14:49:56 +0900733 return;
734
Jaegeuk Kima66cdd92015-04-30 22:37:50 -0700735 if (!force) {
736 if (!test_opt(sbi, DISCARD) || !se->valid_blocks ||
Dan Carpenter912a83b2015-05-14 11:52:28 +0300737 SM_I(sbi)->nr_discards >= SM_I(sbi)->max_discards)
738 return;
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -0700739 }
740
Jaegeuk Kimb2955552013-11-12 14:49:56 +0900741 /* SIT_VBLOCK_MAP_SIZE should be multiple of sizeof(unsigned long) */
742 for (i = 0; i < entries; i++)
Jaegeuk Kima66cdd92015-04-30 22:37:50 -0700743 dmap[i] = force ? ~ckpt_map[i] & ~discard_map[i] :
Jaegeuk Kimd7bc2482014-12-12 13:53:41 -0800744 (cur_map[i] ^ ckpt_map[i]) & ckpt_map[i];
Jaegeuk Kimb2955552013-11-12 14:49:56 +0900745
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -0700746 while (force || SM_I(sbi)->nr_discards <= SM_I(sbi)->max_discards) {
Jaegeuk Kimb2955552013-11-12 14:49:56 +0900747 start = __find_rev_next_bit(dmap, max_blocks, end + 1);
748 if (start >= max_blocks)
749 break;
750
751 end = __find_rev_next_zero_bit(dmap, max_blocks, start + 1);
Yunlei Hec7b41e12016-07-07 12:13:33 +0800752 if (force && start && end != max_blocks
753 && (end - start) < cpc->trim_minlen)
754 continue;
755
Jaegeuk Kima66cdd92015-04-30 22:37:50 -0700756 __add_discard_entry(sbi, cpc, se, start, end);
Jaegeuk Kimb2955552013-11-12 14:49:56 +0900757 }
758}
759
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -0700760void release_discard_addrs(struct f2fs_sb_info *sbi)
761{
762 struct list_head *head = &(SM_I(sbi)->discard_list);
763 struct discard_entry *entry, *this;
764
765 /* drop caches */
766 list_for_each_entry_safe(entry, this, head, list) {
767 list_del(&entry->list);
768 kmem_cache_free(discard_entry_slab, entry);
769 }
770}
771
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +0900772/*
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900773 * Should call clear_prefree_segments after checkpoint is done.
774 */
775static void set_prefree_as_free_segments(struct f2fs_sb_info *sbi)
776{
777 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
Chao Yub65ee142014-08-04 10:10:07 +0800778 unsigned int segno;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900779
780 mutex_lock(&dirty_i->seglist_lock);
Jaegeuk Kim7cd85582014-09-23 11:23:01 -0700781 for_each_set_bit(segno, dirty_i->dirty_segmap[PRE], MAIN_SEGS(sbi))
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900782 __set_test_and_free(sbi, segno);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900783 mutex_unlock(&dirty_i->seglist_lock);
784}
785
Jaegeuk Kim836b5a62015-04-30 22:50:06 -0700786void clear_prefree_segments(struct f2fs_sb_info *sbi, struct cp_control *cpc)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900787{
Jaegeuk Kimb2955552013-11-12 14:49:56 +0900788 struct list_head *head = &(SM_I(sbi)->discard_list);
Chao Yu2d7b8222014-03-29 11:33:17 +0800789 struct discard_entry *entry, *this;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900790 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
Chao Yu275b66b2016-08-29 23:58:34 +0800791 struct blk_plug plug;
Changman Lee29e59c12013-11-11 09:24:37 +0900792 unsigned long *prefree_map = dirty_i->dirty_segmap[PRE];
Changman Lee29e59c12013-11-11 09:24:37 +0900793 unsigned int start = 0, end = -1;
Jaegeuk Kim36abef42016-06-03 19:29:38 -0700794 unsigned int secno, start_segno;
Chao Yuc24a0fd2016-07-07 22:46:55 +0800795 bool force = (cpc->reason == CP_DISCARD);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900796
Chao Yu275b66b2016-08-29 23:58:34 +0800797 blk_start_plug(&plug);
798
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900799 mutex_lock(&dirty_i->seglist_lock);
Changman Lee29e59c12013-11-11 09:24:37 +0900800
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900801 while (1) {
Changman Lee29e59c12013-11-11 09:24:37 +0900802 int i;
Jaegeuk Kim7cd85582014-09-23 11:23:01 -0700803 start = find_next_bit(prefree_map, MAIN_SEGS(sbi), end + 1);
804 if (start >= MAIN_SEGS(sbi))
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900805 break;
Jaegeuk Kim7cd85582014-09-23 11:23:01 -0700806 end = find_next_zero_bit(prefree_map, MAIN_SEGS(sbi),
807 start + 1);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900808
Changman Lee29e59c12013-11-11 09:24:37 +0900809 for (i = start; i < end; i++)
810 clear_bit(i, prefree_map);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900811
Changman Lee29e59c12013-11-11 09:24:37 +0900812 dirty_i->nr_dirty[PRE] -= end - start;
813
Chao Yuc24a0fd2016-07-07 22:46:55 +0800814 if (force || !test_opt(sbi, DISCARD))
Changman Lee29e59c12013-11-11 09:24:37 +0900815 continue;
816
Jaegeuk Kim36abef42016-06-03 19:29:38 -0700817 if (!test_opt(sbi, LFS) || sbi->segs_per_sec == 1) {
818 f2fs_issue_discard(sbi, START_BLOCK(sbi, start),
Jaegeuk Kim37208872013-11-12 16:55:17 +0900819 (end - start) << sbi->log_blocks_per_seg);
Jaegeuk Kim36abef42016-06-03 19:29:38 -0700820 continue;
821 }
822next:
823 secno = GET_SECNO(sbi, start);
824 start_segno = secno * sbi->segs_per_sec;
825 if (!IS_CURSEC(sbi, secno) &&
826 !get_valid_blocks(sbi, start, sbi->segs_per_sec))
827 f2fs_issue_discard(sbi, START_BLOCK(sbi, start_segno),
828 sbi->segs_per_sec << sbi->log_blocks_per_seg);
829
830 start = start_segno + sbi->segs_per_sec;
831 if (start < end)
832 goto next;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900833 }
834 mutex_unlock(&dirty_i->seglist_lock);
Jaegeuk Kimb2955552013-11-12 14:49:56 +0900835
836 /* send small discards */
Chao Yu2d7b8222014-03-29 11:33:17 +0800837 list_for_each_entry_safe(entry, this, head, list) {
Chao Yuc24a0fd2016-07-07 22:46:55 +0800838 if (force && entry->len < cpc->trim_minlen)
Jaegeuk Kim836b5a62015-04-30 22:50:06 -0700839 goto skip;
Jaegeuk Kim37208872013-11-12 16:55:17 +0900840 f2fs_issue_discard(sbi, entry->blkaddr, entry->len);
Jaegeuk Kimf56aa1c2015-06-02 15:48:20 -0700841 cpc->trimmed += entry->len;
Jaegeuk Kim836b5a62015-04-30 22:50:06 -0700842skip:
Jaegeuk Kimb2955552013-11-12 14:49:56 +0900843 list_del(&entry->list);
844 SM_I(sbi)->nr_discards -= entry->len;
845 kmem_cache_free(discard_entry_slab, entry);
846 }
Chao Yu275b66b2016-08-29 23:58:34 +0800847
848 blk_finish_plug(&plug);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900849}
850
Chao Yu184a5cd2014-09-04 18:13:01 +0800851static bool __mark_sit_entry_dirty(struct f2fs_sb_info *sbi, unsigned int segno)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900852{
853 struct sit_info *sit_i = SIT_I(sbi);
Chao Yu184a5cd2014-09-04 18:13:01 +0800854
855 if (!__test_and_set_bit(segno, sit_i->dirty_sentries_bitmap)) {
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900856 sit_i->dirty_sentries++;
Chao Yu184a5cd2014-09-04 18:13:01 +0800857 return false;
858 }
859
860 return true;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900861}
862
863static void __set_sit_entry_type(struct f2fs_sb_info *sbi, int type,
864 unsigned int segno, int modified)
865{
866 struct seg_entry *se = get_seg_entry(sbi, segno);
867 se->type = type;
868 if (modified)
869 __mark_sit_entry_dirty(sbi, segno);
870}
871
872static void update_sit_entry(struct f2fs_sb_info *sbi, block_t blkaddr, int del)
873{
874 struct seg_entry *se;
875 unsigned int segno, offset;
876 long int new_vblocks;
877
878 segno = GET_SEGNO(sbi, blkaddr);
879
880 se = get_seg_entry(sbi, segno);
881 new_vblocks = se->valid_blocks + del;
Jaegeuk Kim491c0852014-02-04 13:01:10 +0900882 offset = GET_BLKOFF_FROM_SEG0(sbi, blkaddr);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900883
Jaegeuk Kim9850cf42014-09-02 15:52:58 -0700884 f2fs_bug_on(sbi, (new_vblocks >> (sizeof(unsigned short) << 3) ||
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900885 (new_vblocks > sbi->blocks_per_seg)));
886
887 se->valid_blocks = new_vblocks;
888 se->mtime = get_mtime(sbi);
889 SIT_I(sbi)->max_mtime = se->mtime;
890
891 /* Update valid block bitmap */
892 if (del > 0) {
Gu Zheng52aca072014-10-20 17:45:51 +0800893 if (f2fs_test_and_set_bit(offset, se->cur_valid_map))
Jaegeuk Kim05796762014-09-02 16:05:00 -0700894 f2fs_bug_on(sbi, 1);
Jaegeuk Kim3e025742016-08-02 10:56:40 -0700895 if (f2fs_discard_en(sbi) &&
896 !f2fs_test_and_set_bit(offset, se->discard_map))
Jaegeuk Kima66cdd92015-04-30 22:37:50 -0700897 sbi->discard_blks--;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900898 } else {
Gu Zheng52aca072014-10-20 17:45:51 +0800899 if (!f2fs_test_and_clear_bit(offset, se->cur_valid_map))
Jaegeuk Kim05796762014-09-02 16:05:00 -0700900 f2fs_bug_on(sbi, 1);
Jaegeuk Kim3e025742016-08-02 10:56:40 -0700901 if (f2fs_discard_en(sbi) &&
902 f2fs_test_and_clear_bit(offset, se->discard_map))
Jaegeuk Kima66cdd92015-04-30 22:37:50 -0700903 sbi->discard_blks++;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900904 }
905 if (!f2fs_test_bit(offset, se->ckpt_valid_map))
906 se->ckpt_valid_blocks += del;
907
908 __mark_sit_entry_dirty(sbi, segno);
909
910 /* update total number of valid blocks to be written in ckpt area */
911 SIT_I(sbi)->written_valid_blocks += del;
912
913 if (sbi->segs_per_sec > 1)
914 get_sec_entry(sbi, segno)->valid_blocks += del;
915}
916
Jaegeuk Kim5e443812014-01-28 12:22:14 +0900917void refresh_sit_entry(struct f2fs_sb_info *sbi, block_t old, block_t new)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900918{
Jaegeuk Kim5e443812014-01-28 12:22:14 +0900919 update_sit_entry(sbi, new, 1);
920 if (GET_SEGNO(sbi, old) != NULL_SEGNO)
921 update_sit_entry(sbi, old, -1);
922
923 locate_dirty_segment(sbi, GET_SEGNO(sbi, old));
924 locate_dirty_segment(sbi, GET_SEGNO(sbi, new));
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900925}
926
927void invalidate_blocks(struct f2fs_sb_info *sbi, block_t addr)
928{
929 unsigned int segno = GET_SEGNO(sbi, addr);
930 struct sit_info *sit_i = SIT_I(sbi);
931
Jaegeuk Kim9850cf42014-09-02 15:52:58 -0700932 f2fs_bug_on(sbi, addr == NULL_ADDR);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900933 if (addr == NEW_ADDR)
934 return;
935
936 /* add it into sit main buffer */
937 mutex_lock(&sit_i->sentry_lock);
938
939 update_sit_entry(sbi, addr, -1);
940
941 /* add it into dirty seglist */
942 locate_dirty_segment(sbi, segno);
943
944 mutex_unlock(&sit_i->sentry_lock);
945}
946
Jaegeuk Kim6e2c64a2015-10-07 12:28:41 -0700947bool is_checkpointed_data(struct f2fs_sb_info *sbi, block_t blkaddr)
948{
949 struct sit_info *sit_i = SIT_I(sbi);
950 unsigned int segno, offset;
951 struct seg_entry *se;
952 bool is_cp = false;
953
954 if (blkaddr == NEW_ADDR || blkaddr == NULL_ADDR)
955 return true;
956
957 mutex_lock(&sit_i->sentry_lock);
958
959 segno = GET_SEGNO(sbi, blkaddr);
960 se = get_seg_entry(sbi, segno);
961 offset = GET_BLKOFF_FROM_SEG0(sbi, blkaddr);
962
963 if (f2fs_test_bit(offset, se->ckpt_valid_map))
964 is_cp = true;
965
966 mutex_unlock(&sit_i->sentry_lock);
967
968 return is_cp;
969}
970
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +0900971/*
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900972 * This function should be resided under the curseg_mutex lock
973 */
974static void __add_sum_entry(struct f2fs_sb_info *sbi, int type,
Haicheng Lie79efe32013-06-13 16:59:27 +0800975 struct f2fs_summary *sum)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900976{
977 struct curseg_info *curseg = CURSEG_I(sbi, type);
978 void *addr = curseg->sum_blk;
Haicheng Lie79efe32013-06-13 16:59:27 +0800979 addr += curseg->next_blkoff * sizeof(struct f2fs_summary);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900980 memcpy(addr, sum, sizeof(struct f2fs_summary));
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900981}
982
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +0900983/*
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900984 * Calculate the number of current summary pages for writing
985 */
Chao Yu3fa06d72014-12-09 14:21:46 +0800986int npages_for_summary_flush(struct f2fs_sb_info *sbi, bool for_ra)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900987{
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900988 int valid_sum_count = 0;
Fan Li9a479382013-10-29 16:21:47 +0800989 int i, sum_in_page;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +0900990
991 for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) {
992 if (sbi->ckpt->alloc_type[i] == SSR)
993 valid_sum_count += sbi->blocks_per_seg;
Chao Yu3fa06d72014-12-09 14:21:46 +0800994 else {
995 if (for_ra)
996 valid_sum_count += le16_to_cpu(
997 F2FS_CKPT(sbi)->cur_data_blkoff[i]);
998 else
999 valid_sum_count += curseg_blkoff(sbi, i);
1000 }
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001001 }
1002
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +03001003 sum_in_page = (PAGE_SIZE - 2 * SUM_JOURNAL_SIZE -
Fan Li9a479382013-10-29 16:21:47 +08001004 SUM_FOOTER_SIZE) / SUMMARY_SIZE;
1005 if (valid_sum_count <= sum_in_page)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001006 return 1;
Fan Li9a479382013-10-29 16:21:47 +08001007 else if ((valid_sum_count - sum_in_page) <=
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +03001008 (PAGE_SIZE - SUM_FOOTER_SIZE) / SUMMARY_SIZE)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001009 return 2;
1010 return 3;
1011}
1012
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +09001013/*
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001014 * Caller should put this summary page
1015 */
1016struct page *get_sum_page(struct f2fs_sb_info *sbi, unsigned int segno)
1017{
1018 return get_meta_page(sbi, GET_SUM_BLOCK(sbi, segno));
1019}
1020
Chao Yu381722d2015-05-19 17:40:04 +08001021void update_meta_page(struct f2fs_sb_info *sbi, void *src, block_t blk_addr)
1022{
1023 struct page *page = grab_meta_page(sbi, blk_addr);
1024 void *dst = page_address(page);
1025
1026 if (src)
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +03001027 memcpy(dst, src, PAGE_SIZE);
Chao Yu381722d2015-05-19 17:40:04 +08001028 else
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +03001029 memset(dst, 0, PAGE_SIZE);
Chao Yu381722d2015-05-19 17:40:04 +08001030 set_page_dirty(page);
1031 f2fs_put_page(page, 1);
1032}
1033
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001034static void write_sum_page(struct f2fs_sb_info *sbi,
1035 struct f2fs_summary_block *sum_blk, block_t blk_addr)
1036{
Chao Yu381722d2015-05-19 17:40:04 +08001037 update_meta_page(sbi, (void *)sum_blk, blk_addr);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001038}
1039
Chao Yub7ad7512016-02-19 18:08:46 +08001040static void write_current_sum_page(struct f2fs_sb_info *sbi,
1041 int type, block_t blk_addr)
1042{
1043 struct curseg_info *curseg = CURSEG_I(sbi, type);
1044 struct page *page = grab_meta_page(sbi, blk_addr);
1045 struct f2fs_summary_block *src = curseg->sum_blk;
1046 struct f2fs_summary_block *dst;
1047
1048 dst = (struct f2fs_summary_block *)page_address(page);
1049
1050 mutex_lock(&curseg->curseg_mutex);
1051
1052 down_read(&curseg->journal_rwsem);
1053 memcpy(&dst->journal, curseg->journal, SUM_JOURNAL_SIZE);
1054 up_read(&curseg->journal_rwsem);
1055
1056 memcpy(dst->entries, src->entries, SUM_ENTRY_SIZE);
1057 memcpy(&dst->footer, &src->footer, SUM_FOOTER_SIZE);
1058
1059 mutex_unlock(&curseg->curseg_mutex);
1060
1061 set_page_dirty(page);
1062 f2fs_put_page(page, 1);
1063}
1064
Jaegeuk Kim60374682013-03-31 13:58:51 +09001065static int is_next_segment_free(struct f2fs_sb_info *sbi, int type)
1066{
1067 struct curseg_info *curseg = CURSEG_I(sbi, type);
Haicheng Li81fb5e82013-05-14 18:20:28 +08001068 unsigned int segno = curseg->segno + 1;
Jaegeuk Kim60374682013-03-31 13:58:51 +09001069 struct free_segmap_info *free_i = FREE_I(sbi);
1070
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07001071 if (segno < MAIN_SEGS(sbi) && segno % sbi->segs_per_sec)
Haicheng Li81fb5e82013-05-14 18:20:28 +08001072 return !test_bit(segno, free_i->free_segmap);
Jaegeuk Kim60374682013-03-31 13:58:51 +09001073 return 0;
1074}
1075
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +09001076/*
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001077 * Find a new segment from the free segments bitmap to right order
1078 * This function should be returned with success, otherwise BUG
1079 */
1080static void get_new_segment(struct f2fs_sb_info *sbi,
1081 unsigned int *newseg, bool new_sec, int dir)
1082{
1083 struct free_segmap_info *free_i = FREE_I(sbi);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001084 unsigned int segno, secno, zoneno;
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07001085 unsigned int total_zones = MAIN_SECS(sbi) / sbi->secs_per_zone;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001086 unsigned int hint = *newseg / sbi->segs_per_sec;
1087 unsigned int old_zoneno = GET_ZONENO_FROM_SEGNO(sbi, *newseg);
1088 unsigned int left_start = hint;
1089 bool init = true;
1090 int go_left = 0;
1091 int i;
1092
Chao Yu1a118cc2015-02-11 18:20:38 +08001093 spin_lock(&free_i->segmap_lock);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001094
1095 if (!new_sec && ((*newseg + 1) % sbi->segs_per_sec)) {
1096 segno = find_next_zero_bit(free_i->free_segmap,
Chao Yu0ab14352016-01-22 17:42:06 +08001097 (hint + 1) * sbi->segs_per_sec, *newseg + 1);
1098 if (segno < (hint + 1) * sbi->segs_per_sec)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001099 goto got_it;
1100 }
1101find_other_zone:
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07001102 secno = find_next_zero_bit(free_i->free_secmap, MAIN_SECS(sbi), hint);
1103 if (secno >= MAIN_SECS(sbi)) {
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001104 if (dir == ALLOC_RIGHT) {
1105 secno = find_next_zero_bit(free_i->free_secmap,
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07001106 MAIN_SECS(sbi), 0);
1107 f2fs_bug_on(sbi, secno >= MAIN_SECS(sbi));
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001108 } else {
1109 go_left = 1;
1110 left_start = hint - 1;
1111 }
1112 }
1113 if (go_left == 0)
1114 goto skip_left;
1115
1116 while (test_bit(left_start, free_i->free_secmap)) {
1117 if (left_start > 0) {
1118 left_start--;
1119 continue;
1120 }
1121 left_start = find_next_zero_bit(free_i->free_secmap,
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07001122 MAIN_SECS(sbi), 0);
1123 f2fs_bug_on(sbi, left_start >= MAIN_SECS(sbi));
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001124 break;
1125 }
1126 secno = left_start;
1127skip_left:
1128 hint = secno;
1129 segno = secno * sbi->segs_per_sec;
1130 zoneno = secno / sbi->secs_per_zone;
1131
1132 /* give up on finding another zone */
1133 if (!init)
1134 goto got_it;
1135 if (sbi->secs_per_zone == 1)
1136 goto got_it;
1137 if (zoneno == old_zoneno)
1138 goto got_it;
1139 if (dir == ALLOC_LEFT) {
1140 if (!go_left && zoneno + 1 >= total_zones)
1141 goto got_it;
1142 if (go_left && zoneno == 0)
1143 goto got_it;
1144 }
1145 for (i = 0; i < NR_CURSEG_TYPE; i++)
1146 if (CURSEG_I(sbi, i)->zone == zoneno)
1147 break;
1148
1149 if (i < NR_CURSEG_TYPE) {
1150 /* zone is in user, try another */
1151 if (go_left)
1152 hint = zoneno * sbi->secs_per_zone - 1;
1153 else if (zoneno + 1 >= total_zones)
1154 hint = 0;
1155 else
1156 hint = (zoneno + 1) * sbi->secs_per_zone;
1157 init = false;
1158 goto find_other_zone;
1159 }
1160got_it:
1161 /* set it as dirty segment in free segmap */
Jaegeuk Kim9850cf42014-09-02 15:52:58 -07001162 f2fs_bug_on(sbi, test_bit(segno, free_i->free_segmap));
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001163 __set_inuse(sbi, segno);
1164 *newseg = segno;
Chao Yu1a118cc2015-02-11 18:20:38 +08001165 spin_unlock(&free_i->segmap_lock);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001166}
1167
1168static void reset_curseg(struct f2fs_sb_info *sbi, int type, int modified)
1169{
1170 struct curseg_info *curseg = CURSEG_I(sbi, type);
1171 struct summary_footer *sum_footer;
1172
1173 curseg->segno = curseg->next_segno;
1174 curseg->zone = GET_ZONENO_FROM_SEGNO(sbi, curseg->segno);
1175 curseg->next_blkoff = 0;
1176 curseg->next_segno = NULL_SEGNO;
1177
1178 sum_footer = &(curseg->sum_blk->footer);
1179 memset(sum_footer, 0, sizeof(struct summary_footer));
1180 if (IS_DATASEG(type))
1181 SET_SUM_TYPE(sum_footer, SUM_TYPE_DATA);
1182 if (IS_NODESEG(type))
1183 SET_SUM_TYPE(sum_footer, SUM_TYPE_NODE);
1184 __set_sit_entry_type(sbi, type, curseg->segno, modified);
1185}
1186
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +09001187/*
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001188 * Allocate a current working segment.
1189 * This function always allocates a free segment in LFS manner.
1190 */
1191static void new_curseg(struct f2fs_sb_info *sbi, int type, bool new_sec)
1192{
1193 struct curseg_info *curseg = CURSEG_I(sbi, type);
1194 unsigned int segno = curseg->segno;
1195 int dir = ALLOC_LEFT;
1196
1197 write_sum_page(sbi, curseg->sum_blk,
Haicheng Li81fb5e82013-05-14 18:20:28 +08001198 GET_SUM_BLOCK(sbi, segno));
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001199 if (type == CURSEG_WARM_DATA || type == CURSEG_COLD_DATA)
1200 dir = ALLOC_RIGHT;
1201
1202 if (test_opt(sbi, NOHEAP))
1203 dir = ALLOC_RIGHT;
1204
1205 get_new_segment(sbi, &segno, new_sec, dir);
1206 curseg->next_segno = segno;
1207 reset_curseg(sbi, type, 1);
1208 curseg->alloc_type = LFS;
1209}
1210
1211static void __next_free_blkoff(struct f2fs_sb_info *sbi,
1212 struct curseg_info *seg, block_t start)
1213{
1214 struct seg_entry *se = get_seg_entry(sbi, seg->segno);
Changman Leee81c93c2013-11-15 13:21:16 +09001215 int entries = SIT_VBLOCK_MAP_SIZE / sizeof(unsigned long);
Jaegeuk Kim60a3b782015-02-10 16:44:29 -08001216 unsigned long *target_map = SIT_I(sbi)->tmp_map;
Changman Leee81c93c2013-11-15 13:21:16 +09001217 unsigned long *ckpt_map = (unsigned long *)se->ckpt_valid_map;
1218 unsigned long *cur_map = (unsigned long *)se->cur_valid_map;
1219 int i, pos;
1220
1221 for (i = 0; i < entries; i++)
1222 target_map[i] = ckpt_map[i] | cur_map[i];
1223
1224 pos = __find_rev_next_zero_bit(target_map, sbi->blocks_per_seg, start);
1225
1226 seg->next_blkoff = pos;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001227}
1228
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +09001229/*
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001230 * If a segment is written by LFS manner, next block offset is just obtained
1231 * by increasing the current block offset. However, if a segment is written by
1232 * SSR manner, next block offset obtained by calling __next_free_blkoff
1233 */
1234static void __refresh_next_blkoff(struct f2fs_sb_info *sbi,
1235 struct curseg_info *seg)
1236{
1237 if (seg->alloc_type == SSR)
1238 __next_free_blkoff(sbi, seg, seg->next_blkoff + 1);
1239 else
1240 seg->next_blkoff++;
1241}
1242
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +09001243/*
arter97e1c42042014-08-06 23:22:50 +09001244 * This function always allocates a used segment(from dirty seglist) by SSR
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001245 * manner, so it should recover the existing segment information of valid blocks
1246 */
1247static void change_curseg(struct f2fs_sb_info *sbi, int type, bool reuse)
1248{
1249 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
1250 struct curseg_info *curseg = CURSEG_I(sbi, type);
1251 unsigned int new_segno = curseg->next_segno;
1252 struct f2fs_summary_block *sum_node;
1253 struct page *sum_page;
1254
1255 write_sum_page(sbi, curseg->sum_blk,
1256 GET_SUM_BLOCK(sbi, curseg->segno));
1257 __set_test_and_inuse(sbi, new_segno);
1258
1259 mutex_lock(&dirty_i->seglist_lock);
1260 __remove_dirty_segment(sbi, new_segno, PRE);
1261 __remove_dirty_segment(sbi, new_segno, DIRTY);
1262 mutex_unlock(&dirty_i->seglist_lock);
1263
1264 reset_curseg(sbi, type, 1);
1265 curseg->alloc_type = SSR;
1266 __next_free_blkoff(sbi, curseg, 0);
1267
1268 if (reuse) {
1269 sum_page = get_sum_page(sbi, new_segno);
1270 sum_node = (struct f2fs_summary_block *)page_address(sum_page);
1271 memcpy(curseg->sum_blk, sum_node, SUM_ENTRY_SIZE);
1272 f2fs_put_page(sum_page, 1);
1273 }
1274}
1275
Jaegeuk Kim43727522013-02-04 15:11:17 +09001276static int get_ssr_segment(struct f2fs_sb_info *sbi, int type)
1277{
1278 struct curseg_info *curseg = CURSEG_I(sbi, type);
1279 const struct victim_selection *v_ops = DIRTY_I(sbi)->v_ops;
1280
1281 if (IS_NODESEG(type) || !has_not_enough_free_secs(sbi, 0))
1282 return v_ops->get_victim(sbi,
1283 &(curseg)->next_segno, BG_GC, type, SSR);
1284
1285 /* For data segments, let's do SSR more intensively */
1286 for (; type >= CURSEG_HOT_DATA; type--)
1287 if (v_ops->get_victim(sbi, &(curseg)->next_segno,
1288 BG_GC, type, SSR))
1289 return 1;
1290 return 0;
1291}
1292
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001293/*
1294 * flush out current segment and replace it with new segment
1295 * This function should be returned with success, otherwise BUG
1296 */
1297static void allocate_segment_by_default(struct f2fs_sb_info *sbi,
1298 int type, bool force)
1299{
1300 struct curseg_info *curseg = CURSEG_I(sbi, type);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001301
Gu Zheng7b405272013-08-19 09:41:15 +08001302 if (force)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001303 new_curseg(sbi, type, true);
Gu Zheng7b405272013-08-19 09:41:15 +08001304 else if (type == CURSEG_WARM_NODE)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001305 new_curseg(sbi, type, false);
Jaegeuk Kim60374682013-03-31 13:58:51 +09001306 else if (curseg->alloc_type == LFS && is_next_segment_free(sbi, type))
1307 new_curseg(sbi, type, false);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001308 else if (need_SSR(sbi) && get_ssr_segment(sbi, type))
1309 change_curseg(sbi, type, true);
1310 else
1311 new_curseg(sbi, type, false);
Jaegeuk Kimdcdfff62013-10-22 20:56:10 +09001312
1313 stat_inc_seg_type(sbi, curseg);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001314}
1315
Jaegeuk Kim38aa0882015-01-05 16:02:20 -08001316static void __allocate_new_segments(struct f2fs_sb_info *sbi, int type)
1317{
1318 struct curseg_info *curseg = CURSEG_I(sbi, type);
1319 unsigned int old_segno;
1320
1321 old_segno = curseg->segno;
1322 SIT_I(sbi)->s_ops->allocate_segment(sbi, type, true);
1323 locate_dirty_segment(sbi, old_segno);
1324}
1325
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001326void allocate_new_segments(struct f2fs_sb_info *sbi)
1327{
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001328 int i;
1329
Jaegeuk Kim36abef42016-06-03 19:29:38 -07001330 if (test_opt(sbi, LFS))
1331 return;
1332
Jaegeuk Kim38aa0882015-01-05 16:02:20 -08001333 for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++)
1334 __allocate_new_segments(sbi, i);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001335}
1336
1337static const struct segment_allocation default_salloc_ops = {
1338 .allocate_segment = allocate_segment_by_default,
1339};
1340
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -07001341int f2fs_trim_fs(struct f2fs_sb_info *sbi, struct fstrim_range *range)
1342{
Jaegeuk Kimf7ef9b82015-02-09 12:02:44 -08001343 __u64 start = F2FS_BYTES_TO_BLK(range->start);
1344 __u64 end = start + F2FS_BYTES_TO_BLK(range->len) - 1;
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -07001345 unsigned int start_segno, end_segno;
1346 struct cp_control cpc;
Chao Yuc34f42e2015-12-23 17:50:30 +08001347 int err = 0;
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -07001348
Jaegeuk Kim836b5a62015-04-30 22:50:06 -07001349 if (start >= MAX_BLKADDR(sbi) || range->len < sbi->blocksize)
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -07001350 return -EINVAL;
1351
Jan Kara9bd27ae2014-10-21 14:07:33 +02001352 cpc.trimmed = 0;
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07001353 if (end <= MAIN_BLKADDR(sbi))
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -07001354 goto out;
1355
1356 /* start/end segment number in main_area */
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07001357 start_segno = (start <= MAIN_BLKADDR(sbi)) ? 0 : GET_SEGNO(sbi, start);
1358 end_segno = (end >= MAX_BLKADDR(sbi)) ? MAIN_SEGS(sbi) - 1 :
1359 GET_SEGNO(sbi, end);
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -07001360 cpc.reason = CP_DISCARD;
Jaegeuk Kim836b5a62015-04-30 22:50:06 -07001361 cpc.trim_minlen = max_t(__u64, 1, F2FS_BYTES_TO_BLK(range->minlen));
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -07001362
1363 /* do checkpoint to issue discard commands safely */
Jaegeuk Kimbba681c2015-01-26 17:41:23 -08001364 for (; start_segno <= end_segno; start_segno = cpc.trim_end + 1) {
1365 cpc.trim_start = start_segno;
Jaegeuk Kima66cdd92015-04-30 22:37:50 -07001366
1367 if (sbi->discard_blks == 0)
1368 break;
1369 else if (sbi->discard_blks < BATCHED_TRIM_BLOCKS(sbi))
1370 cpc.trim_end = end_segno;
1371 else
1372 cpc.trim_end = min_t(unsigned int,
1373 rounddown(start_segno +
Jaegeuk Kimbba681c2015-01-26 17:41:23 -08001374 BATCHED_TRIM_SEGMENTS(sbi),
1375 sbi->segs_per_sec) - 1, end_segno);
1376
1377 mutex_lock(&sbi->gc_mutex);
Chao Yuc34f42e2015-12-23 17:50:30 +08001378 err = write_checkpoint(sbi, &cpc);
Jaegeuk Kimbba681c2015-01-26 17:41:23 -08001379 mutex_unlock(&sbi->gc_mutex);
Chao Yue9328352016-08-21 23:21:29 +08001380 if (err)
1381 break;
Chao Yu74fa5f32016-08-21 23:21:30 +08001382
1383 schedule();
Jaegeuk Kimbba681c2015-01-26 17:41:23 -08001384 }
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -07001385out:
Jaegeuk Kimf7ef9b82015-02-09 12:02:44 -08001386 range->len = F2FS_BLK_TO_BYTES(cpc.trimmed);
Chao Yuc34f42e2015-12-23 17:50:30 +08001387 return err;
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -07001388}
1389
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001390static bool __has_curseg_space(struct f2fs_sb_info *sbi, int type)
1391{
1392 struct curseg_info *curseg = CURSEG_I(sbi, type);
1393 if (curseg->next_blkoff < sbi->blocks_per_seg)
1394 return true;
1395 return false;
1396}
1397
1398static int __get_segment_type_2(struct page *page, enum page_type p_type)
1399{
1400 if (p_type == DATA)
1401 return CURSEG_HOT_DATA;
1402 else
1403 return CURSEG_HOT_NODE;
1404}
1405
1406static int __get_segment_type_4(struct page *page, enum page_type p_type)
1407{
1408 if (p_type == DATA) {
1409 struct inode *inode = page->mapping->host;
1410
1411 if (S_ISDIR(inode->i_mode))
1412 return CURSEG_HOT_DATA;
1413 else
1414 return CURSEG_COLD_DATA;
1415 } else {
Jaegeuk Kima344b9f2014-11-05 20:05:53 -08001416 if (IS_DNODE(page) && is_cold_node(page))
1417 return CURSEG_WARM_NODE;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001418 else
1419 return CURSEG_COLD_NODE;
1420 }
1421}
1422
1423static int __get_segment_type_6(struct page *page, enum page_type p_type)
1424{
1425 if (p_type == DATA) {
1426 struct inode *inode = page->mapping->host;
1427
1428 if (S_ISDIR(inode->i_mode))
1429 return CURSEG_HOT_DATA;
Jaegeuk Kim354a3392013-06-14 08:52:35 +09001430 else if (is_cold_data(page) || file_is_cold(inode))
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001431 return CURSEG_COLD_DATA;
1432 else
1433 return CURSEG_WARM_DATA;
1434 } else {
1435 if (IS_DNODE(page))
1436 return is_cold_node(page) ? CURSEG_WARM_NODE :
1437 CURSEG_HOT_NODE;
1438 else
1439 return CURSEG_COLD_NODE;
1440 }
1441}
1442
1443static int __get_segment_type(struct page *page, enum page_type p_type)
1444{
Jaegeuk Kim40813632014-09-02 15:31:18 -07001445 switch (F2FS_P_SB(page)->active_logs) {
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001446 case 2:
1447 return __get_segment_type_2(page, p_type);
1448 case 4:
1449 return __get_segment_type_4(page, p_type);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001450 }
Jaegeuk Kim12a67142012-12-21 11:47:05 +09001451 /* NR_CURSEG_TYPE(6) logs by default */
Jaegeuk Kim9850cf42014-09-02 15:52:58 -07001452 f2fs_bug_on(F2FS_P_SB(page),
1453 F2FS_P_SB(page)->active_logs != NR_CURSEG_TYPE);
Jaegeuk Kim12a67142012-12-21 11:47:05 +09001454 return __get_segment_type_6(page, p_type);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001455}
1456
Jaegeuk Kimbfad7c22013-12-16 19:04:05 +09001457void allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
1458 block_t old_blkaddr, block_t *new_blkaddr,
1459 struct f2fs_summary *sum, int type)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001460{
1461 struct sit_info *sit_i = SIT_I(sbi);
1462 struct curseg_info *curseg;
Jaegeuk Kim38aa0882015-01-05 16:02:20 -08001463 bool direct_io = (type == CURSEG_DIRECT_IO);
1464
1465 type = direct_io ? CURSEG_WARM_DATA : type;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001466
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001467 curseg = CURSEG_I(sbi, type);
1468
1469 mutex_lock(&curseg->curseg_mutex);
Jaegeuk Kim21cb1d92015-03-11 13:42:48 -04001470 mutex_lock(&sit_i->sentry_lock);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001471
Jaegeuk Kim38aa0882015-01-05 16:02:20 -08001472 /* direct_io'ed data is aligned to the segment for better performance */
Jaegeuk Kim47e70ca2015-08-11 10:17:27 -07001473 if (direct_io && curseg->next_blkoff &&
1474 !has_not_enough_free_secs(sbi, 0))
Jaegeuk Kim38aa0882015-01-05 16:02:20 -08001475 __allocate_new_segments(sbi, type);
1476
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001477 *new_blkaddr = NEXT_FREE_BLKADDR(sbi, curseg);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001478
1479 /*
1480 * __add_sum_entry should be resided under the curseg_mutex
1481 * because, this function updates a summary entry in the
1482 * current summary block.
1483 */
Haicheng Lie79efe32013-06-13 16:59:27 +08001484 __add_sum_entry(sbi, type, sum);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001485
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001486 __refresh_next_blkoff(sbi, curseg);
Jaegeuk Kimdcdfff62013-10-22 20:56:10 +09001487
1488 stat_inc_block_count(sbi, curseg);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001489
Jaegeuk Kim5e443812014-01-28 12:22:14 +09001490 if (!__has_curseg_space(sbi, type))
1491 sit_i->s_ops->allocate_segment(sbi, type, false);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001492 /*
1493 * SIT information should be updated before segment allocation,
1494 * since SSR needs latest valid block information.
1495 */
1496 refresh_sit_entry(sbi, old_blkaddr, *new_blkaddr);
Jaegeuk Kim5e443812014-01-28 12:22:14 +09001497
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001498 mutex_unlock(&sit_i->sentry_lock);
1499
Jaegeuk Kimbfad7c22013-12-16 19:04:05 +09001500 if (page && IS_NODESEG(type))
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001501 fill_node_footer_blkaddr(page, NEXT_FREE_BLKADDR(sbi, curseg));
1502
Jaegeuk Kimbfad7c22013-12-16 19:04:05 +09001503 mutex_unlock(&curseg->curseg_mutex);
1504}
1505
Jaegeuk Kim05ca3632015-04-23 14:38:15 -07001506static void do_write_page(struct f2fs_summary *sum, struct f2fs_io_info *fio)
Jaegeuk Kimbfad7c22013-12-16 19:04:05 +09001507{
Jaegeuk Kim05ca3632015-04-23 14:38:15 -07001508 int type = __get_segment_type(fio->page, fio->type);
Jaegeuk Kimbfad7c22013-12-16 19:04:05 +09001509
Jaegeuk Kim7dfeaa32016-06-04 14:21:28 -07001510 if (fio->type == NODE || fio->type == DATA)
1511 mutex_lock(&fio->sbi->wio_mutex[fio->type]);
1512
Chao Yu7a9d7542016-02-22 18:36:38 +08001513 allocate_data_block(fio->sbi, fio->page, fio->old_blkaddr,
1514 &fio->new_blkaddr, sum, type);
Jaegeuk Kimbfad7c22013-12-16 19:04:05 +09001515
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001516 /* writeout dirty page into bdev */
Jaegeuk Kim05ca3632015-04-23 14:38:15 -07001517 f2fs_submit_page_mbio(fio);
Jaegeuk Kim7dfeaa32016-06-04 14:21:28 -07001518
1519 if (fio->type == NODE || fio->type == DATA)
1520 mutex_unlock(&fio->sbi->wio_mutex[fio->type]);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001521}
1522
Jaegeuk Kim577e3492013-01-24 19:56:11 +09001523void write_meta_page(struct f2fs_sb_info *sbi, struct page *page)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001524{
Jaegeuk Kim458e6192013-12-11 13:54:01 +09001525 struct f2fs_io_info fio = {
Jaegeuk Kim05ca3632015-04-23 14:38:15 -07001526 .sbi = sbi,
Jaegeuk Kim458e6192013-12-11 13:54:01 +09001527 .type = META,
Mike Christie04d328d2016-06-05 14:31:55 -05001528 .op = REQ_OP_WRITE,
1529 .op_flags = WRITE_SYNC | REQ_META | REQ_PRIO,
Chao Yu7a9d7542016-02-22 18:36:38 +08001530 .old_blkaddr = page->index,
1531 .new_blkaddr = page->index,
Jaegeuk Kim05ca3632015-04-23 14:38:15 -07001532 .page = page,
Jaegeuk Kim4375a332015-04-23 12:04:33 -07001533 .encrypted_page = NULL,
Jaegeuk Kim458e6192013-12-11 13:54:01 +09001534 };
1535
Chao Yu2b947002015-10-12 17:04:21 +08001536 if (unlikely(page->index >= MAIN_BLKADDR(sbi)))
Mike Christie04d328d2016-06-05 14:31:55 -05001537 fio.op_flags &= ~REQ_META;
Chao Yu2b947002015-10-12 17:04:21 +08001538
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001539 set_page_writeback(page);
Jaegeuk Kim05ca3632015-04-23 14:38:15 -07001540 f2fs_submit_page_mbio(&fio);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001541}
1542
Jaegeuk Kim05ca3632015-04-23 14:38:15 -07001543void write_node_page(unsigned int nid, struct f2fs_io_info *fio)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001544{
1545 struct f2fs_summary sum;
Jaegeuk Kim05ca3632015-04-23 14:38:15 -07001546
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001547 set_summary(&sum, nid, 0, 0);
Jaegeuk Kim05ca3632015-04-23 14:38:15 -07001548 do_write_page(&sum, fio);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001549}
1550
Jaegeuk Kim05ca3632015-04-23 14:38:15 -07001551void write_data_page(struct dnode_of_data *dn, struct f2fs_io_info *fio)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001552{
Jaegeuk Kim05ca3632015-04-23 14:38:15 -07001553 struct f2fs_sb_info *sbi = fio->sbi;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001554 struct f2fs_summary sum;
1555 struct node_info ni;
1556
Jaegeuk Kim9850cf42014-09-02 15:52:58 -07001557 f2fs_bug_on(sbi, dn->data_blkaddr == NULL_ADDR);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001558 get_node_info(sbi, dn->nid, &ni);
1559 set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version);
Jaegeuk Kim05ca3632015-04-23 14:38:15 -07001560 do_write_page(&sum, fio);
Chao Yuf28b3432016-02-24 17:16:47 +08001561 f2fs_update_data_blkaddr(dn, fio->new_blkaddr);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001562}
1563
Jaegeuk Kim05ca3632015-04-23 14:38:15 -07001564void rewrite_data_page(struct f2fs_io_info *fio)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001565{
Chao Yu7a9d7542016-02-22 18:36:38 +08001566 fio->new_blkaddr = fio->old_blkaddr;
Jaegeuk Kim05ca3632015-04-23 14:38:15 -07001567 stat_inc_inplace_blocks(fio->sbi);
1568 f2fs_submit_page_mbio(fio);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001569}
1570
Chao Yu4356e482016-02-23 17:52:43 +08001571void __f2fs_replace_block(struct f2fs_sb_info *sbi, struct f2fs_summary *sum,
Chao Yu19f106b2015-05-06 13:08:06 +08001572 block_t old_blkaddr, block_t new_blkaddr,
Chao Yu28bc1062016-02-06 14:40:34 +08001573 bool recover_curseg, bool recover_newaddr)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001574{
1575 struct sit_info *sit_i = SIT_I(sbi);
1576 struct curseg_info *curseg;
1577 unsigned int segno, old_cursegno;
1578 struct seg_entry *se;
1579 int type;
Chao Yu19f106b2015-05-06 13:08:06 +08001580 unsigned short old_blkoff;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001581
1582 segno = GET_SEGNO(sbi, new_blkaddr);
1583 se = get_seg_entry(sbi, segno);
1584 type = se->type;
1585
Chao Yu19f106b2015-05-06 13:08:06 +08001586 if (!recover_curseg) {
1587 /* for recovery flow */
1588 if (se->valid_blocks == 0 && !IS_CURSEG(sbi, segno)) {
1589 if (old_blkaddr == NULL_ADDR)
1590 type = CURSEG_COLD_DATA;
1591 else
1592 type = CURSEG_WARM_DATA;
1593 }
1594 } else {
1595 if (!IS_CURSEG(sbi, segno))
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001596 type = CURSEG_WARM_DATA;
1597 }
Chao Yu19f106b2015-05-06 13:08:06 +08001598
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001599 curseg = CURSEG_I(sbi, type);
1600
1601 mutex_lock(&curseg->curseg_mutex);
1602 mutex_lock(&sit_i->sentry_lock);
1603
1604 old_cursegno = curseg->segno;
Chao Yu19f106b2015-05-06 13:08:06 +08001605 old_blkoff = curseg->next_blkoff;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001606
1607 /* change the current segment */
1608 if (segno != curseg->segno) {
1609 curseg->next_segno = segno;
1610 change_curseg(sbi, type, true);
1611 }
1612
Jaegeuk Kim491c0852014-02-04 13:01:10 +09001613 curseg->next_blkoff = GET_BLKOFF_FROM_SEG0(sbi, new_blkaddr);
Haicheng Lie79efe32013-06-13 16:59:27 +08001614 __add_sum_entry(sbi, type, sum);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001615
Chao Yu28bc1062016-02-06 14:40:34 +08001616 if (!recover_curseg || recover_newaddr)
Jaegeuk Kim6e2c64a2015-10-07 12:28:41 -07001617 update_sit_entry(sbi, new_blkaddr, 1);
1618 if (GET_SEGNO(sbi, old_blkaddr) != NULL_SEGNO)
1619 update_sit_entry(sbi, old_blkaddr, -1);
1620
1621 locate_dirty_segment(sbi, GET_SEGNO(sbi, old_blkaddr));
1622 locate_dirty_segment(sbi, GET_SEGNO(sbi, new_blkaddr));
1623
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001624 locate_dirty_segment(sbi, old_cursegno);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001625
Chao Yu19f106b2015-05-06 13:08:06 +08001626 if (recover_curseg) {
1627 if (old_cursegno != curseg->segno) {
1628 curseg->next_segno = old_cursegno;
1629 change_curseg(sbi, type, true);
1630 }
1631 curseg->next_blkoff = old_blkoff;
1632 }
1633
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001634 mutex_unlock(&sit_i->sentry_lock);
1635 mutex_unlock(&curseg->curseg_mutex);
1636}
1637
Chao Yu528e3452015-05-28 19:15:35 +08001638void f2fs_replace_block(struct f2fs_sb_info *sbi, struct dnode_of_data *dn,
1639 block_t old_addr, block_t new_addr,
Chao Yu28bc1062016-02-06 14:40:34 +08001640 unsigned char version, bool recover_curseg,
1641 bool recover_newaddr)
Chao Yu528e3452015-05-28 19:15:35 +08001642{
1643 struct f2fs_summary sum;
1644
1645 set_summary(&sum, dn->nid, dn->ofs_in_node, version);
1646
Chao Yu28bc1062016-02-06 14:40:34 +08001647 __f2fs_replace_block(sbi, &sum, old_addr, new_addr,
1648 recover_curseg, recover_newaddr);
Chao Yu528e3452015-05-28 19:15:35 +08001649
Chao Yuf28b3432016-02-24 17:16:47 +08001650 f2fs_update_data_blkaddr(dn, new_addr);
Chao Yu528e3452015-05-28 19:15:35 +08001651}
1652
Jaegeuk Kim93dfe2a2013-11-30 12:51:14 +09001653void f2fs_wait_on_page_writeback(struct page *page,
Jaegeuk Kimfec1d652016-01-20 23:43:51 +08001654 enum page_type type, bool ordered)
Jaegeuk Kim93dfe2a2013-11-30 12:51:14 +09001655{
Jaegeuk Kim93dfe2a2013-11-30 12:51:14 +09001656 if (PageWriteback(page)) {
Jaegeuk Kim40813632014-09-02 15:31:18 -07001657 struct f2fs_sb_info *sbi = F2FS_P_SB(page);
1658
Chao Yu0c3a5792016-01-18 18:28:11 +08001659 f2fs_submit_merged_bio_cond(sbi, NULL, page, 0, type, WRITE);
Jaegeuk Kimfec1d652016-01-20 23:43:51 +08001660 if (ordered)
1661 wait_on_page_writeback(page);
1662 else
1663 wait_for_stable_page(page);
Jaegeuk Kim93dfe2a2013-11-30 12:51:14 +09001664 }
1665}
1666
Chao Yu08b39fb2015-10-08 13:27:34 +08001667void f2fs_wait_on_encrypted_page_writeback(struct f2fs_sb_info *sbi,
1668 block_t blkaddr)
1669{
1670 struct page *cpage;
1671
1672 if (blkaddr == NEW_ADDR)
1673 return;
1674
1675 f2fs_bug_on(sbi, blkaddr == NULL_ADDR);
1676
1677 cpage = find_lock_page(META_MAPPING(sbi), blkaddr);
1678 if (cpage) {
Jaegeuk Kimfec1d652016-01-20 23:43:51 +08001679 f2fs_wait_on_page_writeback(cpage, DATA, true);
Chao Yu08b39fb2015-10-08 13:27:34 +08001680 f2fs_put_page(cpage, 1);
1681 }
1682}
1683
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001684static int read_compacted_summaries(struct f2fs_sb_info *sbi)
1685{
1686 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1687 struct curseg_info *seg_i;
1688 unsigned char *kaddr;
1689 struct page *page;
1690 block_t start;
1691 int i, j, offset;
1692
1693 start = start_sum_block(sbi);
1694
1695 page = get_meta_page(sbi, start++);
1696 kaddr = (unsigned char *)page_address(page);
1697
1698 /* Step 1: restore nat cache */
1699 seg_i = CURSEG_I(sbi, CURSEG_HOT_DATA);
Chao Yub7ad7512016-02-19 18:08:46 +08001700 memcpy(seg_i->journal, kaddr, SUM_JOURNAL_SIZE);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001701
1702 /* Step 2: restore sit cache */
1703 seg_i = CURSEG_I(sbi, CURSEG_COLD_DATA);
Chao Yub7ad7512016-02-19 18:08:46 +08001704 memcpy(seg_i->journal, kaddr + SUM_JOURNAL_SIZE, SUM_JOURNAL_SIZE);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001705 offset = 2 * SUM_JOURNAL_SIZE;
1706
1707 /* Step 3: restore summary entries */
1708 for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) {
1709 unsigned short blk_off;
1710 unsigned int segno;
1711
1712 seg_i = CURSEG_I(sbi, i);
1713 segno = le32_to_cpu(ckpt->cur_data_segno[i]);
1714 blk_off = le16_to_cpu(ckpt->cur_data_blkoff[i]);
1715 seg_i->next_segno = segno;
1716 reset_curseg(sbi, i, 0);
1717 seg_i->alloc_type = ckpt->alloc_type[i];
1718 seg_i->next_blkoff = blk_off;
1719
1720 if (seg_i->alloc_type == SSR)
1721 blk_off = sbi->blocks_per_seg;
1722
1723 for (j = 0; j < blk_off; j++) {
1724 struct f2fs_summary *s;
1725 s = (struct f2fs_summary *)(kaddr + offset);
1726 seg_i->sum_blk->entries[j] = *s;
1727 offset += SUMMARY_SIZE;
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +03001728 if (offset + SUMMARY_SIZE <= PAGE_SIZE -
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001729 SUM_FOOTER_SIZE)
1730 continue;
1731
1732 f2fs_put_page(page, 1);
1733 page = NULL;
1734
1735 page = get_meta_page(sbi, start++);
1736 kaddr = (unsigned char *)page_address(page);
1737 offset = 0;
1738 }
1739 }
1740 f2fs_put_page(page, 1);
1741 return 0;
1742}
1743
1744static int read_normal_summaries(struct f2fs_sb_info *sbi, int type)
1745{
1746 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1747 struct f2fs_summary_block *sum;
1748 struct curseg_info *curseg;
1749 struct page *new;
1750 unsigned short blk_off;
1751 unsigned int segno = 0;
1752 block_t blk_addr = 0;
1753
1754 /* get segment number and block addr */
1755 if (IS_DATASEG(type)) {
1756 segno = le32_to_cpu(ckpt->cur_data_segno[type]);
1757 blk_off = le16_to_cpu(ckpt->cur_data_blkoff[type -
1758 CURSEG_HOT_DATA]);
Jaegeuk Kim119ee912015-01-29 11:45:33 -08001759 if (__exist_node_summaries(sbi))
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001760 blk_addr = sum_blk_addr(sbi, NR_CURSEG_TYPE, type);
1761 else
1762 blk_addr = sum_blk_addr(sbi, NR_CURSEG_DATA_TYPE, type);
1763 } else {
1764 segno = le32_to_cpu(ckpt->cur_node_segno[type -
1765 CURSEG_HOT_NODE]);
1766 blk_off = le16_to_cpu(ckpt->cur_node_blkoff[type -
1767 CURSEG_HOT_NODE]);
Jaegeuk Kim119ee912015-01-29 11:45:33 -08001768 if (__exist_node_summaries(sbi))
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001769 blk_addr = sum_blk_addr(sbi, NR_CURSEG_NODE_TYPE,
1770 type - CURSEG_HOT_NODE);
1771 else
1772 blk_addr = GET_SUM_BLOCK(sbi, segno);
1773 }
1774
1775 new = get_meta_page(sbi, blk_addr);
1776 sum = (struct f2fs_summary_block *)page_address(new);
1777
1778 if (IS_NODESEG(type)) {
Jaegeuk Kim119ee912015-01-29 11:45:33 -08001779 if (__exist_node_summaries(sbi)) {
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001780 struct f2fs_summary *ns = &sum->entries[0];
1781 int i;
1782 for (i = 0; i < sbi->blocks_per_seg; i++, ns++) {
1783 ns->version = 0;
1784 ns->ofs_in_node = 0;
1785 }
1786 } else {
Gu Zhengd6537882014-03-07 18:43:36 +08001787 int err;
1788
1789 err = restore_node_summary(sbi, segno, sum);
1790 if (err) {
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001791 f2fs_put_page(new, 1);
Gu Zhengd6537882014-03-07 18:43:36 +08001792 return err;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001793 }
1794 }
1795 }
1796
1797 /* set uncompleted segment to curseg */
1798 curseg = CURSEG_I(sbi, type);
1799 mutex_lock(&curseg->curseg_mutex);
Chao Yub7ad7512016-02-19 18:08:46 +08001800
1801 /* update journal info */
1802 down_write(&curseg->journal_rwsem);
1803 memcpy(curseg->journal, &sum->journal, SUM_JOURNAL_SIZE);
1804 up_write(&curseg->journal_rwsem);
1805
1806 memcpy(curseg->sum_blk->entries, sum->entries, SUM_ENTRY_SIZE);
1807 memcpy(&curseg->sum_blk->footer, &sum->footer, SUM_FOOTER_SIZE);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001808 curseg->next_segno = segno;
1809 reset_curseg(sbi, type, 0);
1810 curseg->alloc_type = ckpt->alloc_type[type];
1811 curseg->next_blkoff = blk_off;
1812 mutex_unlock(&curseg->curseg_mutex);
1813 f2fs_put_page(new, 1);
1814 return 0;
1815}
1816
1817static int restore_curseg_summaries(struct f2fs_sb_info *sbi)
1818{
1819 int type = CURSEG_HOT_DATA;
Chao Yue4fc5fb2014-03-17 16:36:24 +08001820 int err;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001821
Jaegeuk Kim25ca9232012-11-28 16:12:41 +09001822 if (is_set_ckpt_flags(F2FS_CKPT(sbi), CP_COMPACT_SUM_FLAG)) {
Chao Yu3fa06d72014-12-09 14:21:46 +08001823 int npages = npages_for_summary_flush(sbi, true);
1824
1825 if (npages >= 2)
1826 ra_meta_pages(sbi, start_sum_block(sbi), npages,
Chao Yu26879fb2015-10-12 17:05:59 +08001827 META_CP, true);
Chao Yu3fa06d72014-12-09 14:21:46 +08001828
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001829 /* restore for compacted data summary */
1830 if (read_compacted_summaries(sbi))
1831 return -EINVAL;
1832 type = CURSEG_HOT_NODE;
1833 }
1834
Jaegeuk Kim119ee912015-01-29 11:45:33 -08001835 if (__exist_node_summaries(sbi))
Chao Yu3fa06d72014-12-09 14:21:46 +08001836 ra_meta_pages(sbi, sum_blk_addr(sbi, NR_CURSEG_TYPE, type),
Chao Yu26879fb2015-10-12 17:05:59 +08001837 NR_CURSEG_TYPE - type, META_CP, true);
Chao Yu3fa06d72014-12-09 14:21:46 +08001838
Chao Yue4fc5fb2014-03-17 16:36:24 +08001839 for (; type <= CURSEG_COLD_NODE; type++) {
1840 err = read_normal_summaries(sbi, type);
1841 if (err)
1842 return err;
1843 }
1844
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001845 return 0;
1846}
1847
1848static void write_compacted_summaries(struct f2fs_sb_info *sbi, block_t blkaddr)
1849{
1850 struct page *page;
1851 unsigned char *kaddr;
1852 struct f2fs_summary *summary;
1853 struct curseg_info *seg_i;
1854 int written_size = 0;
1855 int i, j;
1856
1857 page = grab_meta_page(sbi, blkaddr++);
1858 kaddr = (unsigned char *)page_address(page);
1859
1860 /* Step 1: write nat cache */
1861 seg_i = CURSEG_I(sbi, CURSEG_HOT_DATA);
Chao Yub7ad7512016-02-19 18:08:46 +08001862 memcpy(kaddr, seg_i->journal, SUM_JOURNAL_SIZE);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001863 written_size += SUM_JOURNAL_SIZE;
1864
1865 /* Step 2: write sit cache */
1866 seg_i = CURSEG_I(sbi, CURSEG_COLD_DATA);
Chao Yub7ad7512016-02-19 18:08:46 +08001867 memcpy(kaddr + written_size, seg_i->journal, SUM_JOURNAL_SIZE);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001868 written_size += SUM_JOURNAL_SIZE;
1869
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001870 /* Step 3: write summary entries */
1871 for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) {
1872 unsigned short blkoff;
1873 seg_i = CURSEG_I(sbi, i);
1874 if (sbi->ckpt->alloc_type[i] == SSR)
1875 blkoff = sbi->blocks_per_seg;
1876 else
1877 blkoff = curseg_blkoff(sbi, i);
1878
1879 for (j = 0; j < blkoff; j++) {
1880 if (!page) {
1881 page = grab_meta_page(sbi, blkaddr++);
1882 kaddr = (unsigned char *)page_address(page);
1883 written_size = 0;
1884 }
1885 summary = (struct f2fs_summary *)(kaddr + written_size);
1886 *summary = seg_i->sum_blk->entries[j];
1887 written_size += SUMMARY_SIZE;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001888
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +03001889 if (written_size + SUMMARY_SIZE <= PAGE_SIZE -
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001890 SUM_FOOTER_SIZE)
1891 continue;
1892
Chao Yue8d61a72013-10-24 15:08:28 +08001893 set_page_dirty(page);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001894 f2fs_put_page(page, 1);
1895 page = NULL;
1896 }
1897 }
Chao Yue8d61a72013-10-24 15:08:28 +08001898 if (page) {
1899 set_page_dirty(page);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001900 f2fs_put_page(page, 1);
Chao Yue8d61a72013-10-24 15:08:28 +08001901 }
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001902}
1903
1904static void write_normal_summaries(struct f2fs_sb_info *sbi,
1905 block_t blkaddr, int type)
1906{
1907 int i, end;
1908 if (IS_DATASEG(type))
1909 end = type + NR_CURSEG_DATA_TYPE;
1910 else
1911 end = type + NR_CURSEG_NODE_TYPE;
1912
Chao Yub7ad7512016-02-19 18:08:46 +08001913 for (i = type; i < end; i++)
1914 write_current_sum_page(sbi, i, blkaddr + (i - type));
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001915}
1916
1917void write_data_summaries(struct f2fs_sb_info *sbi, block_t start_blk)
1918{
Jaegeuk Kim25ca9232012-11-28 16:12:41 +09001919 if (is_set_ckpt_flags(F2FS_CKPT(sbi), CP_COMPACT_SUM_FLAG))
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001920 write_compacted_summaries(sbi, start_blk);
1921 else
1922 write_normal_summaries(sbi, start_blk, CURSEG_HOT_DATA);
1923}
1924
1925void write_node_summaries(struct f2fs_sb_info *sbi, block_t start_blk)
1926{
Jaegeuk Kim119ee912015-01-29 11:45:33 -08001927 write_normal_summaries(sbi, start_blk, CURSEG_HOT_NODE);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001928}
1929
Chao Yudfc08a12016-02-14 18:50:40 +08001930int lookup_journal_in_cursum(struct f2fs_journal *journal, int type,
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001931 unsigned int val, int alloc)
1932{
1933 int i;
1934
1935 if (type == NAT_JOURNAL) {
Chao Yudfc08a12016-02-14 18:50:40 +08001936 for (i = 0; i < nats_in_cursum(journal); i++) {
1937 if (le32_to_cpu(nid_in_journal(journal, i)) == val)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001938 return i;
1939 }
Chao Yudfc08a12016-02-14 18:50:40 +08001940 if (alloc && __has_cursum_space(journal, 1, NAT_JOURNAL))
1941 return update_nats_in_cursum(journal, 1);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001942 } else if (type == SIT_JOURNAL) {
Chao Yudfc08a12016-02-14 18:50:40 +08001943 for (i = 0; i < sits_in_cursum(journal); i++)
1944 if (le32_to_cpu(segno_in_journal(journal, i)) == val)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001945 return i;
Chao Yudfc08a12016-02-14 18:50:40 +08001946 if (alloc && __has_cursum_space(journal, 1, SIT_JOURNAL))
1947 return update_sits_in_cursum(journal, 1);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001948 }
1949 return -1;
1950}
1951
1952static struct page *get_current_sit_page(struct f2fs_sb_info *sbi,
1953 unsigned int segno)
1954{
Gu Zheng2cc22182014-10-20 17:45:49 +08001955 return get_meta_page(sbi, current_sit_addr(sbi, segno));
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001956}
1957
1958static struct page *get_next_sit_page(struct f2fs_sb_info *sbi,
1959 unsigned int start)
1960{
1961 struct sit_info *sit_i = SIT_I(sbi);
1962 struct page *src_page, *dst_page;
1963 pgoff_t src_off, dst_off;
1964 void *src_addr, *dst_addr;
1965
1966 src_off = current_sit_addr(sbi, start);
1967 dst_off = next_sit_addr(sbi, src_off);
1968
1969 /* get current sit block page without lock */
1970 src_page = get_meta_page(sbi, src_off);
1971 dst_page = grab_meta_page(sbi, dst_off);
Jaegeuk Kim9850cf42014-09-02 15:52:58 -07001972 f2fs_bug_on(sbi, PageDirty(src_page));
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001973
1974 src_addr = page_address(src_page);
1975 dst_addr = page_address(dst_page);
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +03001976 memcpy(dst_addr, src_addr, PAGE_SIZE);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09001977
1978 set_page_dirty(dst_page);
1979 f2fs_put_page(src_page, 1);
1980
1981 set_to_next_sit(sit_i, start);
1982
1983 return dst_page;
1984}
1985
Chao Yu184a5cd2014-09-04 18:13:01 +08001986static struct sit_entry_set *grab_sit_entry_set(void)
1987{
1988 struct sit_entry_set *ses =
Jaegeuk Kim80c54502015-08-20 08:51:56 -07001989 f2fs_kmem_cache_alloc(sit_entry_set_slab, GFP_NOFS);
Chao Yu184a5cd2014-09-04 18:13:01 +08001990
1991 ses->entry_cnt = 0;
1992 INIT_LIST_HEAD(&ses->set_list);
1993 return ses;
1994}
1995
1996static void release_sit_entry_set(struct sit_entry_set *ses)
1997{
1998 list_del(&ses->set_list);
1999 kmem_cache_free(sit_entry_set_slab, ses);
2000}
2001
2002static void adjust_sit_entry_set(struct sit_entry_set *ses,
2003 struct list_head *head)
2004{
2005 struct sit_entry_set *next = ses;
2006
2007 if (list_is_last(&ses->set_list, head))
2008 return;
2009
2010 list_for_each_entry_continue(next, head, set_list)
2011 if (ses->entry_cnt <= next->entry_cnt)
2012 break;
2013
2014 list_move_tail(&ses->set_list, &next->set_list);
2015}
2016
2017static void add_sit_entry(unsigned int segno, struct list_head *head)
2018{
2019 struct sit_entry_set *ses;
2020 unsigned int start_segno = START_SEGNO(segno);
2021
2022 list_for_each_entry(ses, head, set_list) {
2023 if (ses->start_segno == start_segno) {
2024 ses->entry_cnt++;
2025 adjust_sit_entry_set(ses, head);
2026 return;
2027 }
2028 }
2029
2030 ses = grab_sit_entry_set();
2031
2032 ses->start_segno = start_segno;
2033 ses->entry_cnt++;
2034 list_add(&ses->set_list, head);
2035}
2036
2037static void add_sits_in_set(struct f2fs_sb_info *sbi)
2038{
2039 struct f2fs_sm_info *sm_info = SM_I(sbi);
2040 struct list_head *set_list = &sm_info->sit_entry_set;
2041 unsigned long *bitmap = SIT_I(sbi)->dirty_sentries_bitmap;
Chao Yu184a5cd2014-09-04 18:13:01 +08002042 unsigned int segno;
2043
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07002044 for_each_set_bit(segno, bitmap, MAIN_SEGS(sbi))
Chao Yu184a5cd2014-09-04 18:13:01 +08002045 add_sit_entry(segno, set_list);
2046}
2047
2048static void remove_sits_in_journal(struct f2fs_sb_info *sbi)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002049{
2050 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA);
Chao Yub7ad7512016-02-19 18:08:46 +08002051 struct f2fs_journal *journal = curseg->journal;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002052 int i;
2053
Chao Yub7ad7512016-02-19 18:08:46 +08002054 down_write(&curseg->journal_rwsem);
Chao Yudfc08a12016-02-14 18:50:40 +08002055 for (i = 0; i < sits_in_cursum(journal); i++) {
Chao Yu184a5cd2014-09-04 18:13:01 +08002056 unsigned int segno;
2057 bool dirtied;
2058
Chao Yudfc08a12016-02-14 18:50:40 +08002059 segno = le32_to_cpu(segno_in_journal(journal, i));
Chao Yu184a5cd2014-09-04 18:13:01 +08002060 dirtied = __mark_sit_entry_dirty(sbi, segno);
2061
2062 if (!dirtied)
2063 add_sit_entry(segno, &SM_I(sbi)->sit_entry_set);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002064 }
Chao Yudfc08a12016-02-14 18:50:40 +08002065 update_sits_in_cursum(journal, -i);
Chao Yub7ad7512016-02-19 18:08:46 +08002066 up_write(&curseg->journal_rwsem);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002067}
2068
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +09002069/*
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002070 * CP calls this function, which flushes SIT entries including sit_journal,
2071 * and moves prefree segs to free segs.
2072 */
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -07002073void flush_sit_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002074{
2075 struct sit_info *sit_i = SIT_I(sbi);
2076 unsigned long *bitmap = sit_i->dirty_sentries_bitmap;
2077 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA);
Chao Yub7ad7512016-02-19 18:08:46 +08002078 struct f2fs_journal *journal = curseg->journal;
Chao Yu184a5cd2014-09-04 18:13:01 +08002079 struct sit_entry_set *ses, *tmp;
2080 struct list_head *head = &SM_I(sbi)->sit_entry_set;
Chao Yu184a5cd2014-09-04 18:13:01 +08002081 bool to_journal = true;
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -07002082 struct seg_entry *se;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002083
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002084 mutex_lock(&sit_i->sentry_lock);
2085
Wanpeng Li2b11a742015-02-27 16:52:50 +08002086 if (!sit_i->dirty_sentries)
2087 goto out;
2088
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002089 /*
Chao Yu184a5cd2014-09-04 18:13:01 +08002090 * add and account sit entries of dirty bitmap in sit entry
2091 * set temporarily
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002092 */
Chao Yu184a5cd2014-09-04 18:13:01 +08002093 add_sits_in_set(sbi);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002094
Chao Yu184a5cd2014-09-04 18:13:01 +08002095 /*
2096 * if there are no enough space in journal to store dirty sit
2097 * entries, remove all entries from journal and add and account
2098 * them in sit entry set.
2099 */
Chao Yudfc08a12016-02-14 18:50:40 +08002100 if (!__has_cursum_space(journal, sit_i->dirty_sentries, SIT_JOURNAL))
Chao Yu184a5cd2014-09-04 18:13:01 +08002101 remove_sits_in_journal(sbi);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002102
Chao Yu184a5cd2014-09-04 18:13:01 +08002103 /*
2104 * there are two steps to flush sit entries:
2105 * #1, flush sit entries to journal in current cold data summary block.
2106 * #2, flush sit entries to sit page.
2107 */
2108 list_for_each_entry_safe(ses, tmp, head, set_list) {
Jaegeuk Kim4a257ed2014-10-16 11:43:30 -07002109 struct page *page = NULL;
Chao Yu184a5cd2014-09-04 18:13:01 +08002110 struct f2fs_sit_block *raw_sit = NULL;
2111 unsigned int start_segno = ses->start_segno;
2112 unsigned int end = min(start_segno + SIT_ENTRY_PER_BLOCK,
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07002113 (unsigned long)MAIN_SEGS(sbi));
Chao Yu184a5cd2014-09-04 18:13:01 +08002114 unsigned int segno = start_segno;
Jaegeuk Kimb2955552013-11-12 14:49:56 +09002115
Chao Yu184a5cd2014-09-04 18:13:01 +08002116 if (to_journal &&
Chao Yudfc08a12016-02-14 18:50:40 +08002117 !__has_cursum_space(journal, ses->entry_cnt, SIT_JOURNAL))
Chao Yu184a5cd2014-09-04 18:13:01 +08002118 to_journal = false;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002119
Chao Yub7ad7512016-02-19 18:08:46 +08002120 if (to_journal) {
2121 down_write(&curseg->journal_rwsem);
2122 } else {
Chao Yu184a5cd2014-09-04 18:13:01 +08002123 page = get_next_sit_page(sbi, start_segno);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002124 raw_sit = page_address(page);
2125 }
2126
Chao Yu184a5cd2014-09-04 18:13:01 +08002127 /* flush dirty sit entries in region of current sit set */
2128 for_each_set_bit_from(segno, bitmap, end) {
2129 int offset, sit_offset;
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -07002130
2131 se = get_seg_entry(sbi, segno);
Chao Yu184a5cd2014-09-04 18:13:01 +08002132
2133 /* add discard candidates */
Jaegeuk Kimd7bc2482014-12-12 13:53:41 -08002134 if (cpc->reason != CP_DISCARD) {
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -07002135 cpc->trim_start = segno;
2136 add_discard_addrs(sbi, cpc);
2137 }
Chao Yu184a5cd2014-09-04 18:13:01 +08002138
2139 if (to_journal) {
Chao Yudfc08a12016-02-14 18:50:40 +08002140 offset = lookup_journal_in_cursum(journal,
Chao Yu184a5cd2014-09-04 18:13:01 +08002141 SIT_JOURNAL, segno, 1);
2142 f2fs_bug_on(sbi, offset < 0);
Chao Yudfc08a12016-02-14 18:50:40 +08002143 segno_in_journal(journal, offset) =
Chao Yu184a5cd2014-09-04 18:13:01 +08002144 cpu_to_le32(segno);
2145 seg_info_to_raw_sit(se,
Chao Yudfc08a12016-02-14 18:50:40 +08002146 &sit_in_journal(journal, offset));
Chao Yu184a5cd2014-09-04 18:13:01 +08002147 } else {
2148 sit_offset = SIT_ENTRY_OFFSET(sit_i, segno);
2149 seg_info_to_raw_sit(se,
2150 &raw_sit->entries[sit_offset]);
2151 }
2152
2153 __clear_bit(segno, bitmap);
2154 sit_i->dirty_sentries--;
2155 ses->entry_cnt--;
2156 }
2157
Chao Yub7ad7512016-02-19 18:08:46 +08002158 if (to_journal)
2159 up_write(&curseg->journal_rwsem);
2160 else
Chao Yu184a5cd2014-09-04 18:13:01 +08002161 f2fs_put_page(page, 1);
2162
2163 f2fs_bug_on(sbi, ses->entry_cnt);
2164 release_sit_entry_set(ses);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002165 }
Chao Yu184a5cd2014-09-04 18:13:01 +08002166
2167 f2fs_bug_on(sbi, !list_empty(head));
2168 f2fs_bug_on(sbi, sit_i->dirty_sentries);
Chao Yu184a5cd2014-09-04 18:13:01 +08002169out:
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -07002170 if (cpc->reason == CP_DISCARD) {
2171 for (; cpc->trim_start <= cpc->trim_end; cpc->trim_start++)
2172 add_discard_addrs(sbi, cpc);
2173 }
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002174 mutex_unlock(&sit_i->sentry_lock);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002175
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002176 set_prefree_as_free_segments(sbi);
2177}
2178
2179static int build_sit_info(struct f2fs_sb_info *sbi)
2180{
2181 struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
2182 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
2183 struct sit_info *sit_i;
2184 unsigned int sit_segs, start;
2185 char *src_bitmap, *dst_bitmap;
2186 unsigned int bitmap_size;
2187
2188 /* allocate memory for SIT information */
2189 sit_i = kzalloc(sizeof(struct sit_info), GFP_KERNEL);
2190 if (!sit_i)
2191 return -ENOMEM;
2192
2193 SM_I(sbi)->sit_info = sit_i;
2194
Jaegeuk Kim39307a82015-09-22 13:50:47 -07002195 sit_i->sentries = f2fs_kvzalloc(MAIN_SEGS(sbi) *
2196 sizeof(struct seg_entry), GFP_KERNEL);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002197 if (!sit_i->sentries)
2198 return -ENOMEM;
2199
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07002200 bitmap_size = f2fs_bitmap_size(MAIN_SEGS(sbi));
Jaegeuk Kim39307a82015-09-22 13:50:47 -07002201 sit_i->dirty_sentries_bitmap = f2fs_kvzalloc(bitmap_size, GFP_KERNEL);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002202 if (!sit_i->dirty_sentries_bitmap)
2203 return -ENOMEM;
2204
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07002205 for (start = 0; start < MAIN_SEGS(sbi); start++) {
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002206 sit_i->sentries[start].cur_valid_map
2207 = kzalloc(SIT_VBLOCK_MAP_SIZE, GFP_KERNEL);
2208 sit_i->sentries[start].ckpt_valid_map
2209 = kzalloc(SIT_VBLOCK_MAP_SIZE, GFP_KERNEL);
Jaegeuk Kima66cdd92015-04-30 22:37:50 -07002210 if (!sit_i->sentries[start].cur_valid_map ||
Jaegeuk Kim3e025742016-08-02 10:56:40 -07002211 !sit_i->sentries[start].ckpt_valid_map)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002212 return -ENOMEM;
Jaegeuk Kim3e025742016-08-02 10:56:40 -07002213
2214 if (f2fs_discard_en(sbi)) {
2215 sit_i->sentries[start].discard_map
2216 = kzalloc(SIT_VBLOCK_MAP_SIZE, GFP_KERNEL);
2217 if (!sit_i->sentries[start].discard_map)
2218 return -ENOMEM;
2219 }
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002220 }
2221
Jaegeuk Kim60a3b782015-02-10 16:44:29 -08002222 sit_i->tmp_map = kzalloc(SIT_VBLOCK_MAP_SIZE, GFP_KERNEL);
2223 if (!sit_i->tmp_map)
2224 return -ENOMEM;
2225
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002226 if (sbi->segs_per_sec > 1) {
Jaegeuk Kim39307a82015-09-22 13:50:47 -07002227 sit_i->sec_entries = f2fs_kvzalloc(MAIN_SECS(sbi) *
2228 sizeof(struct sec_entry), GFP_KERNEL);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002229 if (!sit_i->sec_entries)
2230 return -ENOMEM;
2231 }
2232
2233 /* get information related with SIT */
2234 sit_segs = le32_to_cpu(raw_super->segment_count_sit) >> 1;
2235
2236 /* setup SIT bitmap from ckeckpoint pack */
2237 bitmap_size = __bitmap_size(sbi, SIT_BITMAP);
2238 src_bitmap = __bitmap_ptr(sbi, SIT_BITMAP);
2239
Alexandru Gheorghiu79b57932013-03-28 02:24:53 +02002240 dst_bitmap = kmemdup(src_bitmap, bitmap_size, GFP_KERNEL);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002241 if (!dst_bitmap)
2242 return -ENOMEM;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002243
2244 /* init SIT information */
2245 sit_i->s_ops = &default_salloc_ops;
2246
2247 sit_i->sit_base_addr = le32_to_cpu(raw_super->sit_blkaddr);
2248 sit_i->sit_blocks = sit_segs << sbi->log_blocks_per_seg;
2249 sit_i->written_valid_blocks = le64_to_cpu(ckpt->valid_block_count);
2250 sit_i->sit_bitmap = dst_bitmap;
2251 sit_i->bitmap_size = bitmap_size;
2252 sit_i->dirty_sentries = 0;
2253 sit_i->sents_per_block = SIT_ENTRY_PER_BLOCK;
2254 sit_i->elapsed_time = le64_to_cpu(sbi->ckpt->elapsed_time);
2255 sit_i->mounted_time = CURRENT_TIME_SEC.tv_sec;
2256 mutex_init(&sit_i->sentry_lock);
2257 return 0;
2258}
2259
2260static int build_free_segmap(struct f2fs_sb_info *sbi)
2261{
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002262 struct free_segmap_info *free_i;
2263 unsigned int bitmap_size, sec_bitmap_size;
2264
2265 /* allocate memory for free segmap information */
2266 free_i = kzalloc(sizeof(struct free_segmap_info), GFP_KERNEL);
2267 if (!free_i)
2268 return -ENOMEM;
2269
2270 SM_I(sbi)->free_info = free_i;
2271
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07002272 bitmap_size = f2fs_bitmap_size(MAIN_SEGS(sbi));
Jaegeuk Kim39307a82015-09-22 13:50:47 -07002273 free_i->free_segmap = f2fs_kvmalloc(bitmap_size, GFP_KERNEL);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002274 if (!free_i->free_segmap)
2275 return -ENOMEM;
2276
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07002277 sec_bitmap_size = f2fs_bitmap_size(MAIN_SECS(sbi));
Jaegeuk Kim39307a82015-09-22 13:50:47 -07002278 free_i->free_secmap = f2fs_kvmalloc(sec_bitmap_size, GFP_KERNEL);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002279 if (!free_i->free_secmap)
2280 return -ENOMEM;
2281
2282 /* set all segments as dirty temporarily */
2283 memset(free_i->free_segmap, 0xff, bitmap_size);
2284 memset(free_i->free_secmap, 0xff, sec_bitmap_size);
2285
2286 /* init free segmap information */
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07002287 free_i->start_segno = GET_SEGNO_FROM_SEG0(sbi, MAIN_BLKADDR(sbi));
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002288 free_i->free_segments = 0;
2289 free_i->free_sections = 0;
Chao Yu1a118cc2015-02-11 18:20:38 +08002290 spin_lock_init(&free_i->segmap_lock);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002291 return 0;
2292}
2293
2294static int build_curseg(struct f2fs_sb_info *sbi)
2295{
Namjae Jeon1042d602012-12-01 10:56:13 +09002296 struct curseg_info *array;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002297 int i;
2298
Fabian Frederickb434bab2014-06-23 18:39:15 +02002299 array = kcalloc(NR_CURSEG_TYPE, sizeof(*array), GFP_KERNEL);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002300 if (!array)
2301 return -ENOMEM;
2302
2303 SM_I(sbi)->curseg_array = array;
2304
2305 for (i = 0; i < NR_CURSEG_TYPE; i++) {
2306 mutex_init(&array[i].curseg_mutex);
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +03002307 array[i].sum_blk = kzalloc(PAGE_SIZE, GFP_KERNEL);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002308 if (!array[i].sum_blk)
2309 return -ENOMEM;
Chao Yub7ad7512016-02-19 18:08:46 +08002310 init_rwsem(&array[i].journal_rwsem);
2311 array[i].journal = kzalloc(sizeof(struct f2fs_journal),
2312 GFP_KERNEL);
2313 if (!array[i].journal)
2314 return -ENOMEM;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002315 array[i].segno = NULL_SEGNO;
2316 array[i].next_blkoff = 0;
2317 }
2318 return restore_curseg_summaries(sbi);
2319}
2320
2321static void build_sit_entries(struct f2fs_sb_info *sbi)
2322{
2323 struct sit_info *sit_i = SIT_I(sbi);
2324 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA);
Chao Yub7ad7512016-02-19 18:08:46 +08002325 struct f2fs_journal *journal = curseg->journal;
Chao Yu74de5932013-11-22 09:09:59 +08002326 int sit_blk_cnt = SIT_BLK_CNT(sbi);
2327 unsigned int i, start, end;
2328 unsigned int readed, start_blk = 0;
Chao Yue9f5b8b2016-02-14 18:54:33 +08002329 int nrpages = MAX_BIO_BLOCKS(sbi) * 8;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002330
Chao Yu74de5932013-11-22 09:09:59 +08002331 do {
Chao Yu26879fb2015-10-12 17:05:59 +08002332 readed = ra_meta_pages(sbi, start_blk, nrpages, META_SIT, true);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002333
Chao Yu74de5932013-11-22 09:09:59 +08002334 start = start_blk * sit_i->sents_per_block;
2335 end = (start_blk + readed) * sit_i->sents_per_block;
2336
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07002337 for (; start < end && start < MAIN_SEGS(sbi); start++) {
Chao Yu74de5932013-11-22 09:09:59 +08002338 struct seg_entry *se = &sit_i->sentries[start];
2339 struct f2fs_sit_block *sit_blk;
2340 struct f2fs_sit_entry sit;
2341 struct page *page;
2342
Chao Yu74de5932013-11-22 09:09:59 +08002343 page = get_current_sit_page(sbi, start);
2344 sit_blk = (struct f2fs_sit_block *)page_address(page);
2345 sit = sit_blk->entries[SIT_ENTRY_OFFSET(sit_i, start)];
2346 f2fs_put_page(page, 1);
Chao Yud600af232016-08-19 23:13:47 +08002347
Chao Yu74de5932013-11-22 09:09:59 +08002348 check_block_count(sbi, start, &sit);
2349 seg_info_from_raw_sit(se, &sit);
Jaegeuk Kima66cdd92015-04-30 22:37:50 -07002350
2351 /* build discard map only one time */
Jaegeuk Kim3e025742016-08-02 10:56:40 -07002352 if (f2fs_discard_en(sbi)) {
2353 memcpy(se->discard_map, se->cur_valid_map,
2354 SIT_VBLOCK_MAP_SIZE);
2355 sbi->discard_blks += sbi->blocks_per_seg -
2356 se->valid_blocks;
2357 }
Jaegeuk Kima66cdd92015-04-30 22:37:50 -07002358
Chao Yud600af232016-08-19 23:13:47 +08002359 if (sbi->segs_per_sec > 1)
2360 get_sec_entry(sbi, start)->valid_blocks +=
2361 se->valid_blocks;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002362 }
Chao Yu74de5932013-11-22 09:09:59 +08002363 start_blk += readed;
2364 } while (start_blk < sit_blk_cnt);
Chao Yud600af232016-08-19 23:13:47 +08002365
2366 down_read(&curseg->journal_rwsem);
2367 for (i = 0; i < sits_in_cursum(journal); i++) {
2368 struct f2fs_sit_entry sit;
2369 struct seg_entry *se;
2370 unsigned int old_valid_blocks;
2371
2372 start = le32_to_cpu(segno_in_journal(journal, i));
2373 se = &sit_i->sentries[start];
2374 sit = sit_in_journal(journal, i);
2375
2376 old_valid_blocks = se->valid_blocks;
2377
2378 check_block_count(sbi, start, &sit);
2379 seg_info_from_raw_sit(se, &sit);
2380
2381 if (f2fs_discard_en(sbi)) {
2382 memcpy(se->discard_map, se->cur_valid_map,
2383 SIT_VBLOCK_MAP_SIZE);
2384 sbi->discard_blks += old_valid_blocks -
2385 se->valid_blocks;
2386 }
2387
2388 if (sbi->segs_per_sec > 1)
2389 get_sec_entry(sbi, start)->valid_blocks +=
2390 se->valid_blocks - old_valid_blocks;
2391 }
2392 up_read(&curseg->journal_rwsem);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002393}
2394
2395static void init_free_segmap(struct f2fs_sb_info *sbi)
2396{
2397 unsigned int start;
2398 int type;
2399
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07002400 for (start = 0; start < MAIN_SEGS(sbi); start++) {
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002401 struct seg_entry *sentry = get_seg_entry(sbi, start);
2402 if (!sentry->valid_blocks)
2403 __set_free(sbi, start);
2404 }
2405
2406 /* set use the current segments */
2407 for (type = CURSEG_HOT_DATA; type <= CURSEG_COLD_NODE; type++) {
2408 struct curseg_info *curseg_t = CURSEG_I(sbi, type);
2409 __set_test_and_inuse(sbi, curseg_t->segno);
2410 }
2411}
2412
2413static void init_dirty_segmap(struct f2fs_sb_info *sbi)
2414{
2415 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
2416 struct free_segmap_info *free_i = FREE_I(sbi);
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07002417 unsigned int segno = 0, offset = 0;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002418 unsigned short valid_blocks;
2419
Namjae Jeon8736fbf2013-06-16 09:49:11 +09002420 while (1) {
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002421 /* find dirty segment based on free segmap */
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07002422 segno = find_next_inuse(free_i, MAIN_SEGS(sbi), offset);
2423 if (segno >= MAIN_SEGS(sbi))
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002424 break;
2425 offset = segno + 1;
2426 valid_blocks = get_valid_blocks(sbi, segno, 0);
Jaegeuk Kimec325b52014-09-02 16:24:11 -07002427 if (valid_blocks == sbi->blocks_per_seg || !valid_blocks)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002428 continue;
Jaegeuk Kimec325b52014-09-02 16:24:11 -07002429 if (valid_blocks > sbi->blocks_per_seg) {
2430 f2fs_bug_on(sbi, 1);
2431 continue;
2432 }
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002433 mutex_lock(&dirty_i->seglist_lock);
2434 __locate_dirty_segment(sbi, segno, DIRTY);
2435 mutex_unlock(&dirty_i->seglist_lock);
2436 }
2437}
2438
Jaegeuk Kim5ec4e492013-03-31 13:26:03 +09002439static int init_victim_secmap(struct f2fs_sb_info *sbi)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002440{
2441 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07002442 unsigned int bitmap_size = f2fs_bitmap_size(MAIN_SECS(sbi));
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002443
Jaegeuk Kim39307a82015-09-22 13:50:47 -07002444 dirty_i->victim_secmap = f2fs_kvzalloc(bitmap_size, GFP_KERNEL);
Jaegeuk Kim5ec4e492013-03-31 13:26:03 +09002445 if (!dirty_i->victim_secmap)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002446 return -ENOMEM;
2447 return 0;
2448}
2449
2450static int build_dirty_segmap(struct f2fs_sb_info *sbi)
2451{
2452 struct dirty_seglist_info *dirty_i;
2453 unsigned int bitmap_size, i;
2454
2455 /* allocate memory for dirty segments list information */
2456 dirty_i = kzalloc(sizeof(struct dirty_seglist_info), GFP_KERNEL);
2457 if (!dirty_i)
2458 return -ENOMEM;
2459
2460 SM_I(sbi)->dirty_info = dirty_i;
2461 mutex_init(&dirty_i->seglist_lock);
2462
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07002463 bitmap_size = f2fs_bitmap_size(MAIN_SEGS(sbi));
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002464
2465 for (i = 0; i < NR_DIRTY_TYPE; i++) {
Jaegeuk Kim39307a82015-09-22 13:50:47 -07002466 dirty_i->dirty_segmap[i] = f2fs_kvzalloc(bitmap_size, GFP_KERNEL);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002467 if (!dirty_i->dirty_segmap[i])
2468 return -ENOMEM;
2469 }
2470
2471 init_dirty_segmap(sbi);
Jaegeuk Kim5ec4e492013-03-31 13:26:03 +09002472 return init_victim_secmap(sbi);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002473}
2474
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +09002475/*
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002476 * Update min, max modified time for cost-benefit GC algorithm
2477 */
2478static void init_min_max_mtime(struct f2fs_sb_info *sbi)
2479{
2480 struct sit_info *sit_i = SIT_I(sbi);
2481 unsigned int segno;
2482
2483 mutex_lock(&sit_i->sentry_lock);
2484
2485 sit_i->min_mtime = LLONG_MAX;
2486
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07002487 for (segno = 0; segno < MAIN_SEGS(sbi); segno += sbi->segs_per_sec) {
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002488 unsigned int i;
2489 unsigned long long mtime = 0;
2490
2491 for (i = 0; i < sbi->segs_per_sec; i++)
2492 mtime += get_seg_entry(sbi, segno + i)->mtime;
2493
2494 mtime = div_u64(mtime, sbi->segs_per_sec);
2495
2496 if (sit_i->min_mtime > mtime)
2497 sit_i->min_mtime = mtime;
2498 }
2499 sit_i->max_mtime = get_mtime(sbi);
2500 mutex_unlock(&sit_i->sentry_lock);
2501}
2502
2503int build_segment_manager(struct f2fs_sb_info *sbi)
2504{
2505 struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
2506 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
Namjae Jeon1042d602012-12-01 10:56:13 +09002507 struct f2fs_sm_info *sm_info;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002508 int err;
2509
2510 sm_info = kzalloc(sizeof(struct f2fs_sm_info), GFP_KERNEL);
2511 if (!sm_info)
2512 return -ENOMEM;
2513
2514 /* init sm info */
2515 sbi->sm_info = sm_info;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002516 sm_info->seg0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr);
2517 sm_info->main_blkaddr = le32_to_cpu(raw_super->main_blkaddr);
2518 sm_info->segment_count = le32_to_cpu(raw_super->segment_count);
2519 sm_info->reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
2520 sm_info->ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
2521 sm_info->main_segments = le32_to_cpu(raw_super->segment_count_main);
2522 sm_info->ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
Jaegeuk Kim58c41032014-03-19 14:17:21 +09002523 sm_info->rec_prefree_segments = sm_info->main_segments *
2524 DEF_RECLAIM_PREFREE_SEGMENTS / 100;
Jaegeuk Kim44a83492016-07-13 18:23:35 -07002525 if (sm_info->rec_prefree_segments > DEF_MAX_RECLAIM_PREFREE_SEGMENTS)
2526 sm_info->rec_prefree_segments = DEF_MAX_RECLAIM_PREFREE_SEGMENTS;
2527
Jaegeuk Kim52763a42016-06-13 09:47:48 -07002528 if (!test_opt(sbi, LFS))
2529 sm_info->ipu_policy = 1 << F2FS_IPU_FSYNC;
Jaegeuk Kim216fbd62013-11-07 13:13:42 +09002530 sm_info->min_ipu_util = DEF_MIN_IPU_UTIL;
Jaegeuk Kimc1ce1b02014-09-10 16:53:02 -07002531 sm_info->min_fsync_blocks = DEF_MIN_FSYNC_BLOCKS;
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002532
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +09002533 INIT_LIST_HEAD(&sm_info->discard_list);
Chao Yu275b66b2016-08-29 23:58:34 +08002534 INIT_LIST_HEAD(&sm_info->wait_list);
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +09002535 sm_info->nr_discards = 0;
2536 sm_info->max_discards = 0;
2537
Jaegeuk Kimbba681c2015-01-26 17:41:23 -08002538 sm_info->trim_sections = DEF_BATCHED_TRIM_SECTIONS;
2539
Chao Yu184a5cd2014-09-04 18:13:01 +08002540 INIT_LIST_HEAD(&sm_info->sit_entry_set);
2541
Gu Zhengb270ad62014-04-11 17:49:55 +08002542 if (test_opt(sbi, FLUSH_MERGE) && !f2fs_readonly(sbi->sb)) {
Gu Zheng2163d192014-04-27 14:21:33 +08002543 err = create_flush_cmd_control(sbi);
2544 if (err)
Gu Zhenga688b9d9e2014-04-27 14:21:21 +08002545 return err;
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +09002546 }
2547
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002548 err = build_sit_info(sbi);
2549 if (err)
2550 return err;
2551 err = build_free_segmap(sbi);
2552 if (err)
2553 return err;
2554 err = build_curseg(sbi);
2555 if (err)
2556 return err;
2557
2558 /* reinit free segmap based on SIT */
2559 build_sit_entries(sbi);
2560
2561 init_free_segmap(sbi);
2562 err = build_dirty_segmap(sbi);
2563 if (err)
2564 return err;
2565
2566 init_min_max_mtime(sbi);
2567 return 0;
2568}
2569
2570static void discard_dirty_segmap(struct f2fs_sb_info *sbi,
2571 enum dirty_type dirty_type)
2572{
2573 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
2574
2575 mutex_lock(&dirty_i->seglist_lock);
Jaegeuk Kim39307a82015-09-22 13:50:47 -07002576 kvfree(dirty_i->dirty_segmap[dirty_type]);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002577 dirty_i->nr_dirty[dirty_type] = 0;
2578 mutex_unlock(&dirty_i->seglist_lock);
2579}
2580
Jaegeuk Kim5ec4e492013-03-31 13:26:03 +09002581static void destroy_victim_secmap(struct f2fs_sb_info *sbi)
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002582{
2583 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
Jaegeuk Kim39307a82015-09-22 13:50:47 -07002584 kvfree(dirty_i->victim_secmap);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002585}
2586
2587static void destroy_dirty_segmap(struct f2fs_sb_info *sbi)
2588{
2589 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
2590 int i;
2591
2592 if (!dirty_i)
2593 return;
2594
2595 /* discard pre-free/dirty segments list */
2596 for (i = 0; i < NR_DIRTY_TYPE; i++)
2597 discard_dirty_segmap(sbi, i);
2598
Jaegeuk Kim5ec4e492013-03-31 13:26:03 +09002599 destroy_victim_secmap(sbi);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002600 SM_I(sbi)->dirty_info = NULL;
2601 kfree(dirty_i);
2602}
2603
2604static void destroy_curseg(struct f2fs_sb_info *sbi)
2605{
2606 struct curseg_info *array = SM_I(sbi)->curseg_array;
2607 int i;
2608
2609 if (!array)
2610 return;
2611 SM_I(sbi)->curseg_array = NULL;
Chao Yub7ad7512016-02-19 18:08:46 +08002612 for (i = 0; i < NR_CURSEG_TYPE; i++) {
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002613 kfree(array[i].sum_blk);
Chao Yub7ad7512016-02-19 18:08:46 +08002614 kfree(array[i].journal);
2615 }
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002616 kfree(array);
2617}
2618
2619static void destroy_free_segmap(struct f2fs_sb_info *sbi)
2620{
2621 struct free_segmap_info *free_i = SM_I(sbi)->free_info;
2622 if (!free_i)
2623 return;
2624 SM_I(sbi)->free_info = NULL;
Jaegeuk Kim39307a82015-09-22 13:50:47 -07002625 kvfree(free_i->free_segmap);
2626 kvfree(free_i->free_secmap);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002627 kfree(free_i);
2628}
2629
2630static void destroy_sit_info(struct f2fs_sb_info *sbi)
2631{
2632 struct sit_info *sit_i = SIT_I(sbi);
2633 unsigned int start;
2634
2635 if (!sit_i)
2636 return;
2637
2638 if (sit_i->sentries) {
Jaegeuk Kim7cd85582014-09-23 11:23:01 -07002639 for (start = 0; start < MAIN_SEGS(sbi); start++) {
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002640 kfree(sit_i->sentries[start].cur_valid_map);
2641 kfree(sit_i->sentries[start].ckpt_valid_map);
Jaegeuk Kima66cdd92015-04-30 22:37:50 -07002642 kfree(sit_i->sentries[start].discard_map);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002643 }
2644 }
Jaegeuk Kim60a3b782015-02-10 16:44:29 -08002645 kfree(sit_i->tmp_map);
2646
Jaegeuk Kim39307a82015-09-22 13:50:47 -07002647 kvfree(sit_i->sentries);
2648 kvfree(sit_i->sec_entries);
2649 kvfree(sit_i->dirty_sentries_bitmap);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002650
2651 SM_I(sbi)->sit_info = NULL;
2652 kfree(sit_i->sit_bitmap);
2653 kfree(sit_i);
2654}
2655
2656void destroy_segment_manager(struct f2fs_sb_info *sbi)
2657{
2658 struct f2fs_sm_info *sm_info = SM_I(sbi);
Gu Zhenga688b9d9e2014-04-27 14:21:21 +08002659
Chao Yu3b03f722013-11-06 09:12:04 +08002660 if (!sm_info)
2661 return;
Gu Zheng2163d192014-04-27 14:21:33 +08002662 destroy_flush_cmd_control(sbi);
Jaegeuk Kim351df4b2012-11-02 17:09:16 +09002663 destroy_dirty_segmap(sbi);
2664 destroy_curseg(sbi);
2665 destroy_free_segmap(sbi);
2666 destroy_sit_info(sbi);
2667 sbi->sm_info = NULL;
2668 kfree(sm_info);
2669}
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +09002670
2671int __init create_segment_manager_caches(void)
2672{
2673 discard_entry_slab = f2fs_kmem_cache_create("discard_entry",
Gu Zhenge8512d22014-03-07 18:43:28 +08002674 sizeof(struct discard_entry));
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +09002675 if (!discard_entry_slab)
Chao Yu184a5cd2014-09-04 18:13:01 +08002676 goto fail;
2677
Chao Yu275b66b2016-08-29 23:58:34 +08002678 bio_entry_slab = f2fs_kmem_cache_create("bio_entry",
2679 sizeof(struct bio_entry));
2680 if (!bio_entry_slab)
Chao Yu6ab2a302016-09-05 12:28:26 +08002681 goto destroy_discard_entry;
Chao Yu275b66b2016-08-29 23:58:34 +08002682
Chao Yu184a5cd2014-09-04 18:13:01 +08002683 sit_entry_set_slab = f2fs_kmem_cache_create("sit_entry_set",
Changman Leec9ee0082014-11-21 15:42:07 +09002684 sizeof(struct sit_entry_set));
Chao Yu184a5cd2014-09-04 18:13:01 +08002685 if (!sit_entry_set_slab)
Chao Yu275b66b2016-08-29 23:58:34 +08002686 goto destroy_bio_entry;
Jaegeuk Kim88b88a62014-10-06 17:39:50 -07002687
2688 inmem_entry_slab = f2fs_kmem_cache_create("inmem_page_entry",
2689 sizeof(struct inmem_pages));
2690 if (!inmem_entry_slab)
2691 goto destroy_sit_entry_set;
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +09002692 return 0;
Chao Yu184a5cd2014-09-04 18:13:01 +08002693
Jaegeuk Kim88b88a62014-10-06 17:39:50 -07002694destroy_sit_entry_set:
2695 kmem_cache_destroy(sit_entry_set_slab);
Chao Yu275b66b2016-08-29 23:58:34 +08002696destroy_bio_entry:
2697 kmem_cache_destroy(bio_entry_slab);
Chao Yu6ab2a302016-09-05 12:28:26 +08002698destroy_discard_entry:
Chao Yu184a5cd2014-09-04 18:13:01 +08002699 kmem_cache_destroy(discard_entry_slab);
2700fail:
2701 return -ENOMEM;
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +09002702}
2703
2704void destroy_segment_manager_caches(void)
2705{
Chao Yu184a5cd2014-09-04 18:13:01 +08002706 kmem_cache_destroy(sit_entry_set_slab);
Chao Yu275b66b2016-08-29 23:58:34 +08002707 kmem_cache_destroy(bio_entry_slab);
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +09002708 kmem_cache_destroy(discard_entry_slab);
Jaegeuk Kim88b88a62014-10-06 17:39:50 -07002709 kmem_cache_destroy(inmem_entry_slab);
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +09002710}