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Merge tag 'docs-4.19' of git://git.lwn.net/linux
[linux-2.6-block.git] / fs / f2fs / segment.c
CommitLineData
0a8165d7 1/*
351df4b2
JK		 2 * 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>
690e4a3e 15#include <linux/prefetch.h>
6b4afdd7 16#include <linux/kthread.h>
74de593a 17#include <linux/swap.h>
60b99b48 18#include <linux/timer.h>
1d7be270 19#include <linux/freezer.h>
1eb1ef4a 20#include <linux/sched/signal.h>
351df4b2
JK		 21
22#include "f2fs.h"
23#include "segment.h"
24#include "node.h"
5f656541 25#include "gc.h"
9e4ded3f 26#include "trace.h"
6ec178da 27#include <trace/events/f2fs.h>
351df4b2 28
9a7f143a
CL		 29#define __reverse_ffz(x) __reverse_ffs(~(x))
30
7fd9e544 31static struct kmem_cache *discard_entry_slab;
b01a9201 32static struct kmem_cache *discard_cmd_slab;
184a5cd2 33static struct kmem_cache *sit_entry_set_slab;
88b88a66 34static struct kmem_cache *inmem_entry_slab;
7fd9e544 35
f96999c3
JK		 36static unsigned long __reverse_ulong(unsigned char *str)
37{
38 unsigned long tmp = 0;
39 int shift = 24, idx = 0;
40
41#if BITS_PER_LONG == 64
42 shift = 56;
43#endif
44 while (shift >= 0) {
45 tmp |= (unsigned long)str[idx++] << shift;
46 shift -= BITS_PER_BYTE;
47 }
48 return tmp;
49}
50
9a7f143a
CL		 51/*
52 * __reverse_ffs is copied from include/asm-generic/bitops/__ffs.h since
53 * MSB and LSB are reversed in a byte by f2fs_set_bit.
54 */
55static inline unsigned long __reverse_ffs(unsigned long word)
56{
57 int num = 0;
58
59#if BITS_PER_LONG == 64
f96999c3 60 if ((word & 0xffffffff00000000UL) == 0)
9a7f143a 61 num += 32;
f96999c3 62 else
9a7f143a 63 word >>= 32;
9a7f143a 64#endif
f96999c3 65 if ((word & 0xffff0000) == 0)
9a7f143a 66 num += 16;
f96999c3 67 else
9a7f143a 68 word >>= 16;
f96999c3
JK		 69
70 if ((word & 0xff00) == 0)
9a7f143a 71 num += 8;
f96999c3 72 else
9a7f143a 73 word >>= 8;
f96999c3 74
9a7f143a
CL		 75 if ((word & 0xf0) == 0)
76 num += 4;
77 else
78 word >>= 4;
f96999c3 79
9a7f143a
CL		 80 if ((word & 0xc) == 0)
81 num += 2;
82 else
83 word >>= 2;
f96999c3 84
9a7f143a
CL		 85 if ((word & 0x2) == 0)
86 num += 1;
87 return num;
88}
89
90/*
e1c42045 91 * __find_rev_next(_zero)_bit is copied from lib/find_next_bit.c because
9a7f143a 92 * f2fs_set_bit makes MSB and LSB reversed in a byte.
692223d1 93 * @size must be integral times of unsigned long.
9a7f143a 94 * Example:
f96999c3
JK		 95 * MSB <--> LSB
96 * f2fs_set_bit(0, bitmap) => 1000 0000
97 * f2fs_set_bit(7, bitmap) => 0000 0001
9a7f143a
CL		 98 */
99static unsigned long __find_rev_next_bit(const unsigned long *addr,
100 unsigned long size, unsigned long offset)
101{
102 const unsigned long *p = addr + BIT_WORD(offset);
692223d1 103 unsigned long result = size;
9a7f143a 104 unsigned long tmp;
9a7f143a
CL		 105
106 if (offset >= size)
107 return size;
108
692223d1 109 size -= (offset & ~(BITS_PER_LONG - 1));
9a7f143a 110 offset %= BITS_PER_LONG;
f96999c3 111
692223d1
FL		 112 while (1) {
113 if (*p == 0)
114 goto pass;
9a7f143a 115
f96999c3 116 tmp = __reverse_ulong((unsigned char *)p);
692223d1
FL		 117
118 tmp &= ~0UL >> offset;
119 if (size < BITS_PER_LONG)
120 tmp &= (~0UL << (BITS_PER_LONG - size));
9a7f143a 121 if (tmp)
692223d1
FL		 122 goto found;
123pass:
124 if (size <= BITS_PER_LONG)
125 break;
9a7f143a 126 size -= BITS_PER_LONG;
692223d1 127 offset = 0;
f96999c3 128 p++;
9a7f143a 129 }
692223d1
FL		 130 return result;
131found:
132 return result - size + __reverse_ffs(tmp);
9a7f143a
CL		 133}
134
135static unsigned long __find_rev_next_zero_bit(const unsigned long *addr,
136 unsigned long size, unsigned long offset)
137{
138 const unsigned long *p = addr + BIT_WORD(offset);
80609448 139 unsigned long result = size;
9a7f143a 140 unsigned long tmp;
9a7f143a
CL		 141
142 if (offset >= size)
143 return size;
144
80609448 145 size -= (offset & ~(BITS_PER_LONG - 1));
9a7f143a 146 offset %= BITS_PER_LONG;
80609448
JK		 147
148 while (1) {
149 if (*p == ~0UL)
150 goto pass;
151
f96999c3 152 tmp = __reverse_ulong((unsigned char *)p);
80609448
JK		 153
154 if (offset)
155 tmp |= ~0UL << (BITS_PER_LONG - offset);
156 if (size < BITS_PER_LONG)
157 tmp |= ~0UL >> size;
f96999c3 158 if (tmp != ~0UL)
80609448
JK		 159 goto found;
160pass:
161 if (size <= BITS_PER_LONG)
162 break;
9a7f143a 163 size -= BITS_PER_LONG;
80609448 164 offset = 0;
f96999c3 165 p++;
9a7f143a 166 }
80609448
JK		 167 return result;
168found:
169 return result - size + __reverse_ffz(tmp);
9a7f143a
CL		 170}
171
4d57b86d 172bool f2fs_need_SSR(struct f2fs_sb_info *sbi)
b3a97a2a
JK		 173{
174 int node_secs = get_blocktype_secs(sbi, F2FS_DIRTY_NODES);
175 int dent_secs = get_blocktype_secs(sbi, F2FS_DIRTY_DENTS);
176 int imeta_secs = get_blocktype_secs(sbi, F2FS_DIRTY_IMETA);
177
178 if (test_opt(sbi, LFS))
179 return false;
5b0e9539 180 if (sbi->gc_mode == GC_URGENT)
b3a97a2a
JK		 181 return true;
182
183 return free_sections(sbi) <= (node_secs + 2 * dent_secs + imeta_secs +
a2a12b67 184 SM_I(sbi)->min_ssr_sections + reserved_sections(sbi));
b3a97a2a
JK		 185}
186
4d57b86d 187void f2fs_register_inmem_page(struct inode *inode, struct page *page)
88b88a66 188{
57864ae5 189 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
88b88a66
JK		 190 struct f2fs_inode_info *fi = F2FS_I(inode);
191 struct inmem_pages *new;
9be32d72 192
9e4ded3f 193 f2fs_trace_pid(page);
0722b101 194
decd36b6
CY		 195 set_page_private(page, (unsigned long)ATOMIC_WRITTEN_PAGE);
196 SetPagePrivate(page);
197
88b88a66
JK		 198 new = f2fs_kmem_cache_alloc(inmem_entry_slab, GFP_NOFS);
199
200 /* add atomic page indices to the list */
201 new->page = page;
202 INIT_LIST_HEAD(&new->list);
decd36b6 203
88b88a66
JK		 204 /* increase reference count with clean state */
205 mutex_lock(&fi->inmem_lock);
206 get_page(page);
207 list_add_tail(&new->list, &fi->inmem_pages);
57864ae5
JK		 208 spin_lock(&sbi->inode_lock[ATOMIC_FILE]);
209 if (list_empty(&fi->inmem_ilist))
210 list_add_tail(&fi->inmem_ilist, &sbi->inode_list[ATOMIC_FILE]);
211 spin_unlock(&sbi->inode_lock[ATOMIC_FILE]);
8dcf2ff7 212 inc_page_count(F2FS_I_SB(inode), F2FS_INMEM_PAGES);
88b88a66 213 mutex_unlock(&fi->inmem_lock);
8ce67cb0
JK		 214
215 trace_f2fs_register_inmem_page(page, INMEM);
88b88a66
JK		 216}
217
28bc106b
CY		 218static int __revoke_inmem_pages(struct inode *inode,
219 struct list_head *head, bool drop, bool recover)
29b96b54 220{
28bc106b 221 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
29b96b54 222 struct inmem_pages *cur, *tmp;
28bc106b 223 int err = 0;
29b96b54
CY		 224
225 list_for_each_entry_safe(cur, tmp, head, list) {
28bc106b
CY		 226 struct page *page = cur->page;
227
228 if (drop)
229 trace_f2fs_commit_inmem_page(page, INMEM_DROP);
230
231 lock_page(page);
29b96b54 232
e5e5732d
CY		 233 f2fs_wait_on_page_writeback(page, DATA, true);
234
28bc106b
CY		 235 if (recover) {
236 struct dnode_of_data dn;
237 struct node_info ni;
238
239 trace_f2fs_commit_inmem_page(page, INMEM_REVOKE);
7f2b4e8e 240retry:
28bc106b 241 set_new_dnode(&dn, inode, NULL, NULL, 0);
4d57b86d
CY		 242 err = f2fs_get_dnode_of_data(&dn, page->index,
243 LOOKUP_NODE);
7f2b4e8e
CY		 244 if (err) {
245 if (err == -ENOMEM) {
246 congestion_wait(BLK_RW_ASYNC, HZ/50);
247 cond_resched();
248 goto retry;
249 }
28bc106b
CY		 250 err = -EAGAIN;
251 goto next;
252 }
4d57b86d 253 f2fs_get_node_info(sbi, dn.nid, &ni);
f1d2564a 254 if (cur->old_addr == NEW_ADDR) {
4d57b86d 255 f2fs_invalidate_blocks(sbi, dn.data_blkaddr);
f1d2564a
DJ		 256 f2fs_update_data_blkaddr(&dn, NEW_ADDR);
257 } else
258 f2fs_replace_block(sbi, &dn, dn.data_blkaddr,
28bc106b
CY		 259 cur->old_addr, ni.version, true, true);
260 f2fs_put_dnode(&dn);
261 }
262next:
63c52d78
JK		 263 /* we don't need to invalidate this in the sccessful status */
264 if (drop || recover)
265 ClearPageUptodate(page);
28bc106b 266 set_page_private(page, 0);
c81ced05 267 ClearPagePrivate(page);
28bc106b 268 f2fs_put_page(page, 1);
29b96b54
CY		 269
270 list_del(&cur->list);
271 kmem_cache_free(inmem_entry_slab, cur);
272 dec_page_count(F2FS_I_SB(inode), F2FS_INMEM_PAGES);
273 }
28bc106b 274 return err;
29b96b54
CY		 275}
276
4d57b86d 277void f2fs_drop_inmem_pages_all(struct f2fs_sb_info *sbi, bool gc_failure)
57864ae5
JK		 278{
279 struct list_head *head = &sbi->inode_list[ATOMIC_FILE];
280 struct inode *inode;
281 struct f2fs_inode_info *fi;
282next:
283 spin_lock(&sbi->inode_lock[ATOMIC_FILE]);
284 if (list_empty(head)) {
285 spin_unlock(&sbi->inode_lock[ATOMIC_FILE]);
286 return;
287 }
288 fi = list_first_entry(head, struct f2fs_inode_info, inmem_ilist);
289 inode = igrab(&fi->vfs_inode);
290 spin_unlock(&sbi->inode_lock[ATOMIC_FILE]);
291
292 if (inode) {
2ef79ecb
CY		 293 if (gc_failure) {
294 if (fi->i_gc_failures[GC_FAILURE_ATOMIC])
295 goto drop;
296 goto skip;
297 }
298drop:
299 set_inode_flag(inode, FI_ATOMIC_REVOKE_REQUEST);
4d57b86d 300 f2fs_drop_inmem_pages(inode);
57864ae5
JK		 301 iput(inode);
302 }
2ef79ecb 303skip:
57864ae5
JK		 304 congestion_wait(BLK_RW_ASYNC, HZ/50);
305 cond_resched();
306 goto next;
307}
308
4d57b86d 309void f2fs_drop_inmem_pages(struct inode *inode)
29b96b54 310{
57864ae5 311 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
29b96b54
CY		 312 struct f2fs_inode_info *fi = F2FS_I(inode);
313
314 mutex_lock(&fi->inmem_lock);
28bc106b 315 __revoke_inmem_pages(inode, &fi->inmem_pages, true, false);
57864ae5
JK		 316 spin_lock(&sbi->inode_lock[ATOMIC_FILE]);
317 if (!list_empty(&fi->inmem_ilist))
318 list_del_init(&fi->inmem_ilist);
319 spin_unlock(&sbi->inode_lock[ATOMIC_FILE]);
29b96b54 320 mutex_unlock(&fi->inmem_lock);
5fe45743
CY		 321
322 clear_inode_flag(inode, FI_ATOMIC_FILE);
2ef79ecb 323 fi->i_gc_failures[GC_FAILURE_ATOMIC] = 0;
5fe45743 324 stat_dec_atomic_write(inode);
29b96b54
CY		 325}
326
4d57b86d 327void f2fs_drop_inmem_page(struct inode *inode, struct page *page)
8c242db9
JK		 328{
329 struct f2fs_inode_info *fi = F2FS_I(inode);
330 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
331 struct list_head *head = &fi->inmem_pages;
332 struct inmem_pages *cur = NULL;
333
334 f2fs_bug_on(sbi, !IS_ATOMIC_WRITTEN_PAGE(page));
335
336 mutex_lock(&fi->inmem_lock);
337 list_for_each_entry(cur, head, list) {
338 if (cur->page == page)
339 break;
340 }
341
d0891e84 342 f2fs_bug_on(sbi, list_empty(head) || cur->page != page);
8c242db9
JK		 343 list_del(&cur->list);
344 mutex_unlock(&fi->inmem_lock);
345
346 dec_page_count(sbi, F2FS_INMEM_PAGES);
347 kmem_cache_free(inmem_entry_slab, cur);
348
349 ClearPageUptodate(page);
350 set_page_private(page, 0);
351 ClearPagePrivate(page);
352 f2fs_put_page(page, 0);
353
354 trace_f2fs_commit_inmem_page(page, INMEM_INVALIDATE);
355}
356
4d57b86d 357static int __f2fs_commit_inmem_pages(struct inode *inode)
88b88a66
JK		 358{
359 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
360 struct f2fs_inode_info *fi = F2FS_I(inode);
361 struct inmem_pages *cur, *tmp;
88b88a66 362 struct f2fs_io_info fio = {
05ca3632 363 .sbi = sbi,
39d787be 364 .ino = inode->i_ino,
88b88a66 365 .type = DATA,
04d328de 366 .op = REQ_OP_WRITE,
70fd7614 367 .op_flags = REQ_SYNC | REQ_PRIO,
b0af6d49 368 .io_type = FS_DATA_IO,
88b88a66 369 };
cf52b27a 370 struct list_head revoke_list;
942fd319 371 pgoff_t last_idx = ULONG_MAX;
edb27dee 372 int err = 0;
88b88a66 373
cf52b27a
CY		 374 INIT_LIST_HEAD(&revoke_list);
375
88b88a66 376 list_for_each_entry_safe(cur, tmp, &fi->inmem_pages, list) {
28bc106b
CY		 377 struct page *page = cur->page;
378
379 lock_page(page);
380 if (page->mapping == inode->i_mapping) {
381 trace_f2fs_commit_inmem_page(page, INMEM);
382
383 set_page_dirty(page);
384 f2fs_wait_on_page_writeback(page, DATA, true);
933439c8 385 if (clear_page_dirty_for_io(page)) {
29b96b54 386 inode_dec_dirty_pages(inode);
4d57b86d 387 f2fs_remove_dirty_inode(inode);
933439c8 388 }
640cc189 389retry:
28bc106b 390 fio.page = page;
e959c8f5 391 fio.old_blkaddr = NULL_ADDR;
4d978078 392 fio.encrypted_page = NULL;
cc15620b 393 fio.need_lock = LOCK_DONE;
4d57b86d 394 err = f2fs_do_write_data_page(&fio);
29b96b54 395 if (err) {
640cc189
JK		 396 if (err == -ENOMEM) {
397 congestion_wait(BLK_RW_ASYNC, HZ/50);
398 cond_resched();
399 goto retry;
400 }
28bc106b 401 unlock_page(page);
29b96b54 402 break;
70c640b1 403 }
28bc106b
CY		 404 /* record old blkaddr for revoking */
405 cur->old_addr = fio.old_blkaddr;
942fd319 406 last_idx = page->index;
28bc106b
CY		 407 }
408 unlock_page(page);
cf52b27a 409 list_move_tail(&cur->list, &revoke_list);
88b88a66 410 }
29b96b54 411
942fd319 412 if (last_idx != ULONG_MAX)
b9109b0e 413 f2fs_submit_merged_write_cond(sbi, inode, 0, last_idx, DATA);
28bc106b 414
cf52b27a
CY		 415 if (err) {
416 /*
417 * try to revoke all committed pages, but still we could fail
418 * due to no memory or other reason, if that happened, EAGAIN
419 * will be returned, which means in such case, transaction is
420 * already not integrity, caller should use journal to do the
421 * recovery or rewrite & commit last transaction. For other
422 * error number, revoking was done by filesystem itself.
423 */
424 err = __revoke_inmem_pages(inode, &revoke_list, false, true);
425
426 /* drop all uncommitted pages */
427 __revoke_inmem_pages(inode, &fi->inmem_pages, true, false);
428 } else {
429 __revoke_inmem_pages(inode, &revoke_list, false, false);
430 }
28bc106b 431
29b96b54
CY		 432 return err;
433}
434
4d57b86d 435int f2fs_commit_inmem_pages(struct inode *inode)
29b96b54
CY		 436{
437 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
438 struct f2fs_inode_info *fi = F2FS_I(inode);
28bc106b 439 int err;
29b96b54
CY		 440
441 f2fs_balance_fs(sbi, true);
442 f2fs_lock_op(sbi);
443
5fe45743
CY		 444 set_inode_flag(inode, FI_ATOMIC_COMMIT);
445
29b96b54 446 mutex_lock(&fi->inmem_lock);
4d57b86d 447 err = __f2fs_commit_inmem_pages(inode);
28bc106b 448
57864ae5
JK		 449 spin_lock(&sbi->inode_lock[ATOMIC_FILE]);
450 if (!list_empty(&fi->inmem_ilist))
451 list_del_init(&fi->inmem_ilist);
452 spin_unlock(&sbi->inode_lock[ATOMIC_FILE]);
88b88a66
JK		 453 mutex_unlock(&fi->inmem_lock);
454
5fe45743
CY		 455 clear_inode_flag(inode, FI_ATOMIC_COMMIT);
456
29b96b54 457 f2fs_unlock_op(sbi);
edb27dee 458 return err;
88b88a66
JK		 459}
460
0a8165d7 461/*
351df4b2
JK		 462 * This function balances dirty node and dentry pages.
463 * In addition, it controls garbage collection.
464 */
2c4db1a6 465void f2fs_balance_fs(struct f2fs_sb_info *sbi, bool need)
351df4b2 466{
0f348028 467#ifdef CONFIG_F2FS_FAULT_INJECTION
55523519
CY		 468 if (time_to_inject(sbi, FAULT_CHECKPOINT)) {
469 f2fs_show_injection_info(FAULT_CHECKPOINT);
0f348028 470 f2fs_stop_checkpoint(sbi, false);
55523519 471 }
0f348028
CY		 472#endif
473
e589c2c4 474 /* balance_fs_bg is able to be pending */
a7881893 475 if (need && excess_cached_nats(sbi))
e589c2c4
JK		 476 f2fs_balance_fs_bg(sbi);
477
351df4b2 478 /*
029cd28c
JK		 479 * We should do GC or end up with checkpoint, if there are so many dirty
480 * dir/node pages without enough free segments.
351df4b2 481 */
7f3037a5 482 if (has_not_enough_free_secs(sbi, 0, 0)) {
351df4b2 483 mutex_lock(&sbi->gc_mutex);
e066b83c 484 f2fs_gc(sbi, false, false, NULL_SEGNO);
351df4b2
JK		 485 }
486}
487
4660f9c0
JK		 488void f2fs_balance_fs_bg(struct f2fs_sb_info *sbi)
489{
64c74a7a
CY		 490 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
491 return;
492
1dcc336b 493 /* try to shrink extent cache when there is no enough memory */
4d57b86d 494 if (!f2fs_available_free_memory(sbi, EXTENT_CACHE))
554df79e 495 f2fs_shrink_extent_tree(sbi, EXTENT_CACHE_SHRINK_NUMBER);
1dcc336b 496
1b38dc8e 497 /* check the # of cached NAT entries */
4d57b86d
CY		 498 if (!f2fs_available_free_memory(sbi, NAT_ENTRIES))
499 f2fs_try_to_free_nats(sbi, NAT_ENTRY_PER_BLOCK);
1b38dc8e 500
4d57b86d
CY		 501 if (!f2fs_available_free_memory(sbi, FREE_NIDS))
502 f2fs_try_to_free_nids(sbi, MAX_FREE_NIDS);
ad4edb83 503 else
4d57b86d 504 f2fs_build_free_nids(sbi, false, false);
31696580 505
1c0f4bf5 506 if (!is_idle(sbi) && !excess_dirty_nats(sbi))
f455c8a5 507 return;
31696580 508
1b38dc8e 509 /* checkpoint is the only way to shrink partial cached entries */
4d57b86d
CY		 510 if (!f2fs_available_free_memory(sbi, NAT_ENTRIES) ||
511 !f2fs_available_free_memory(sbi, INO_ENTRIES) ||
7d768d2c
CY		 512 excess_prefree_segs(sbi) ||
513 excess_dirty_nats(sbi) ||
f455c8a5 514 f2fs_time_over(sbi, CP_TIME)) {
e9f5b8b8
CY		 515 if (test_opt(sbi, DATA_FLUSH)) {
516 struct blk_plug plug;
517
518 blk_start_plug(&plug);
4d57b86d 519 f2fs_sync_dirty_inodes(sbi, FILE_INODE);
e9f5b8b8
CY		 520 blk_finish_plug(&plug);
521 }
4660f9c0 522 f2fs_sync_fs(sbi->sb, true);
42190d2a 523 stat_inc_bg_cp_count(sbi->stat_info);
36b35a0d 524 }
4660f9c0
JK		 525}
526
20fda56b
KM		 527static int __submit_flush_wait(struct f2fs_sb_info *sbi,
528 struct block_device *bdev)
3c62be17 529{
d62fe971 530 struct bio *bio = f2fs_bio_alloc(sbi, 0, true);
3c62be17
JK		 531 int ret;
532
3adc5fcb 533 bio->bi_opf = REQ_OP_WRITE | REQ_SYNC | REQ_PREFLUSH;
74d46992 534 bio_set_dev(bio, bdev);
3c62be17
JK		 535 ret = submit_bio_wait(bio);
536 bio_put(bio);
20fda56b
KM		 537
538 trace_f2fs_issue_flush(bdev, test_opt(sbi, NOBARRIER),
539 test_opt(sbi, FLUSH_MERGE), ret);
3c62be17
JK		 540 return ret;
541}
542
39d787be 543static int submit_flush_wait(struct f2fs_sb_info *sbi, nid_t ino)
3c62be17 544{
39d787be 545 int ret = 0;
3c62be17
JK		 546 int i;
547
39d787be
CY		 548 if (!sbi->s_ndevs)
549 return __submit_flush_wait(sbi, sbi->sb->s_bdev);
20fda56b 550
39d787be 551 for (i = 0; i < sbi->s_ndevs; i++) {
4d57b86d 552 if (!f2fs_is_dirty_device(sbi, ino, i, FLUSH_INO))
39d787be 553 continue;
20fda56b
KM		 554 ret = __submit_flush_wait(sbi, FDEV(i).bdev);
555 if (ret)
556 break;
3c62be17
JK		 557 }
558 return ret;
559}
560
2163d198 561static int issue_flush_thread(void *data)
6b4afdd7
JK		 562{
563 struct f2fs_sb_info *sbi = data;
b01a9201 564 struct flush_cmd_control *fcc = SM_I(sbi)->fcc_info;
a688b9d9 565 wait_queue_head_t *q = &fcc->flush_wait_queue;
6b4afdd7
JK		 566repeat:
567 if (kthread_should_stop())
568 return 0;
569
dc6febb6
CY		 570 sb_start_intwrite(sbi->sb);
571
721bd4d5 572 if (!llist_empty(&fcc->issue_list)) {
6b4afdd7
JK		 573 struct flush_cmd *cmd, *next;
574 int ret;
575
721bd4d5
GZ		 576 fcc->dispatch_list = llist_del_all(&fcc->issue_list);
577 fcc->dispatch_list = llist_reverse_order(fcc->dispatch_list);
578
39d787be
CY		 579 cmd = llist_entry(fcc->dispatch_list, struct flush_cmd, llnode);
580
581 ret = submit_flush_wait(sbi, cmd->ino);
8b8dd65f
CY		 582 atomic_inc(&fcc->issued_flush);
583
721bd4d5
GZ		 584 llist_for_each_entry_safe(cmd, next,
585 fcc->dispatch_list, llnode) {
6b4afdd7 586 cmd->ret = ret;
6b4afdd7
JK		 587 complete(&cmd->wait);
588 }
a688b9d9 589 fcc->dispatch_list = NULL;
6b4afdd7
JK		 590 }
591
dc6febb6
CY		 592 sb_end_intwrite(sbi->sb);
593
a688b9d9 594 wait_event_interruptible(*q,
721bd4d5 595 kthread_should_stop() || !llist_empty(&fcc->issue_list));
6b4afdd7
JK		 596 goto repeat;
597}
598
39d787be 599int f2fs_issue_flush(struct f2fs_sb_info *sbi, nid_t ino)
6b4afdd7 600{
b01a9201 601 struct flush_cmd_control *fcc = SM_I(sbi)->fcc_info;
adf8d90b 602 struct flush_cmd cmd;
8b8dd65f 603 int ret;
6b4afdd7 604
0f7b2abd
JK		 605 if (test_opt(sbi, NOBARRIER))
606 return 0;
607
8b8dd65f 608 if (!test_opt(sbi, FLUSH_MERGE)) {
39d787be 609 ret = submit_flush_wait(sbi, ino);
8b8dd65f
CY		 610 atomic_inc(&fcc->issued_flush);
611 return ret;
612 }
740432f8 613
39d787be
CY		 614 if (atomic_inc_return(&fcc->issing_flush) == 1 || sbi->s_ndevs > 1) {
615 ret = submit_flush_wait(sbi, ino);
8b8dd65f
CY		 616 atomic_dec(&fcc->issing_flush);
617
618 atomic_inc(&fcc->issued_flush);
740432f8
JK		 619 return ret;
620 }
6b4afdd7 621
39d787be 622 cmd.ino = ino;
adf8d90b 623 init_completion(&cmd.wait);
6b4afdd7 624
721bd4d5 625 llist_add(&cmd.llnode, &fcc->issue_list);
6b4afdd7 626
6f890df0
CY		 627 /* update issue_list before we wake up issue_flush thread */
628 smp_mb();
629
630 if (waitqueue_active(&fcc->flush_wait_queue))
a688b9d9 631 wake_up(&fcc->flush_wait_queue);
6b4afdd7 632
5eba8c5d
JK		 633 if (fcc->f2fs_issue_flush) {
634 wait_for_completion(&cmd.wait);
8b8dd65f 635 atomic_dec(&fcc->issing_flush);
5eba8c5d 636 } else {
d3238691
CY		 637 struct llist_node *list;
638
639 list = llist_del_all(&fcc->issue_list);
640 if (!list) {
641 wait_for_completion(&cmd.wait);
642 atomic_dec(&fcc->issing_flush);
643 } else {
644 struct flush_cmd *tmp, *next;
645
39d787be 646 ret = submit_flush_wait(sbi, ino);
d3238691
CY		 647
648 llist_for_each_entry_safe(tmp, next, list, llnode) {
649 if (tmp == &cmd) {
650 cmd.ret = ret;
651 atomic_dec(&fcc->issing_flush);
652 continue;
653 }
654 tmp->ret = ret;
655 complete(&tmp->wait);
656 }
657 }
5eba8c5d 658 }
adf8d90b
CY		 659
660 return cmd.ret;
6b4afdd7
JK		 661}
662
4d57b86d 663int f2fs_create_flush_cmd_control(struct f2fs_sb_info *sbi)
2163d198
GZ		 664{
665 dev_t dev = sbi->sb->s_bdev->bd_dev;
666 struct flush_cmd_control *fcc;
667 int err = 0;
668
b01a9201
JK		 669 if (SM_I(sbi)->fcc_info) {
670 fcc = SM_I(sbi)->fcc_info;
d871cd04
YS		 671 if (fcc->f2fs_issue_flush)
672 return err;
5eba8c5d
JK		 673 goto init_thread;
674 }
675
acbf054d 676 fcc = f2fs_kzalloc(sbi, sizeof(struct flush_cmd_control), GFP_KERNEL);
2163d198
GZ		 677 if (!fcc)
678 return -ENOMEM;
8b8dd65f
CY		 679 atomic_set(&fcc->issued_flush, 0);
680 atomic_set(&fcc->issing_flush, 0);
2163d198 681 init_waitqueue_head(&fcc->flush_wait_queue);
721bd4d5 682 init_llist_head(&fcc->issue_list);
b01a9201 683 SM_I(sbi)->fcc_info = fcc;
d4fdf8ba
YH		 684 if (!test_opt(sbi, FLUSH_MERGE))
685 return err;
686
5eba8c5d 687init_thread:
2163d198
GZ		 688 fcc->f2fs_issue_flush = kthread_run(issue_flush_thread, sbi,
689 "f2fs_flush-%u:%u", MAJOR(dev), MINOR(dev));
690 if (IS_ERR(fcc->f2fs_issue_flush)) {
691 err = PTR_ERR(fcc->f2fs_issue_flush);
692 kfree(fcc);
b01a9201 693 SM_I(sbi)->fcc_info = NULL;
2163d198
GZ		 694 return err;
695 }
2163d198
GZ		 696
697 return err;
698}
699
4d57b86d 700void f2fs_destroy_flush_cmd_control(struct f2fs_sb_info *sbi, bool free)
2163d198 701{
b01a9201 702 struct flush_cmd_control *fcc = SM_I(sbi)->fcc_info;
2163d198 703
5eba8c5d
JK		 704 if (fcc && fcc->f2fs_issue_flush) {
705 struct task_struct *flush_thread = fcc->f2fs_issue_flush;
706
707 fcc->f2fs_issue_flush = NULL;
708 kthread_stop(flush_thread);
709 }
710 if (free) {
711 kfree(fcc);
b01a9201 712 SM_I(sbi)->fcc_info = NULL;
5eba8c5d 713 }
2163d198
GZ		 714}
715
1228b482
CY		 716int f2fs_flush_device_cache(struct f2fs_sb_info *sbi)
717{
718 int ret = 0, i;
719
720 if (!sbi->s_ndevs)
721 return 0;
722
723 for (i = 1; i < sbi->s_ndevs; i++) {
724 if (!f2fs_test_bit(i, (char *)&sbi->dirty_device))
725 continue;
726 ret = __submit_flush_wait(sbi, FDEV(i).bdev);
727 if (ret)
728 break;
729
730 spin_lock(&sbi->dev_lock);
731 f2fs_clear_bit(i, (char *)&sbi->dirty_device);
732 spin_unlock(&sbi->dev_lock);
733 }
734
735 return ret;
736}
737
351df4b2
JK		 738static void __locate_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno,
739 enum dirty_type dirty_type)
740{
741 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
742
743 /* need not be added */
744 if (IS_CURSEG(sbi, segno))
745 return;
746
747 if (!test_and_set_bit(segno, dirty_i->dirty_segmap[dirty_type]))
748 dirty_i->nr_dirty[dirty_type]++;
749
750 if (dirty_type == DIRTY) {
751 struct seg_entry *sentry = get_seg_entry(sbi, segno);
4625d6aa 752 enum dirty_type t = sentry->type;
b2f2c390 753
ec325b52
JK		 754 if (unlikely(t >= DIRTY)) {
755 f2fs_bug_on(sbi, 1);
756 return;
757 }
4625d6aa
CL		 758 if (!test_and_set_bit(segno, dirty_i->dirty_segmap[t]))
759 dirty_i->nr_dirty[t]++;
351df4b2
JK		 760 }
761}
762
763static void __remove_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno,
764 enum dirty_type dirty_type)
765{
766 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
767
768 if (test_and_clear_bit(segno, dirty_i->dirty_segmap[dirty_type]))
769 dirty_i->nr_dirty[dirty_type]--;
770
771 if (dirty_type == DIRTY) {
4625d6aa
CL		 772 struct seg_entry *sentry = get_seg_entry(sbi, segno);
773 enum dirty_type t = sentry->type;
774
775 if (test_and_clear_bit(segno, dirty_i->dirty_segmap[t]))
776 dirty_i->nr_dirty[t]--;
b2f2c390 777
302bd348 778 if (get_valid_blocks(sbi, segno, true) == 0)
4ddb1a4d 779 clear_bit(GET_SEC_FROM_SEG(sbi, segno),
5ec4e49f 780 dirty_i->victim_secmap);
351df4b2
JK		 781 }
782}
783
0a8165d7 784/*
351df4b2
JK		 785 * Should not occur error such as -ENOMEM.
786 * Adding dirty entry into seglist is not critical operation.
787 * If a given segment is one of current working segments, it won't be added.
788 */
8d8451af 789static void locate_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno)
351df4b2
JK		 790{
791 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
792 unsigned short valid_blocks;
793
794 if (segno == NULL_SEGNO || IS_CURSEG(sbi, segno))
795 return;
796
797 mutex_lock(&dirty_i->seglist_lock);
798
302bd348 799 valid_blocks = get_valid_blocks(sbi, segno, false);
351df4b2
JK		 800
801 if (valid_blocks == 0) {
802 __locate_dirty_segment(sbi, segno, PRE);
803 __remove_dirty_segment(sbi, segno, DIRTY);
804 } else if (valid_blocks < sbi->blocks_per_seg) {
805 __locate_dirty_segment(sbi, segno, DIRTY);
806 } else {
807 /* Recovery routine with SSR needs this */
808 __remove_dirty_segment(sbi, segno, DIRTY);
809 }
810
811 mutex_unlock(&dirty_i->seglist_lock);
351df4b2
JK		 812}
813
004b6862 814static struct discard_cmd *__create_discard_cmd(struct f2fs_sb_info *sbi,
c81abe34
JK		 815 struct block_device *bdev, block_t lstart,
816 block_t start, block_t len)
275b66b0 817{
0b54fb84 818 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
ba48a33e 819 struct list_head *pend_list;
b01a9201 820 struct discard_cmd *dc;
275b66b0 821
ba48a33e
CY		 822 f2fs_bug_on(sbi, !len);
823
824 pend_list = &dcc->pend_list[plist_idx(len)];
825
b01a9201
JK		 826 dc = f2fs_kmem_cache_alloc(discard_cmd_slab, GFP_NOFS);
827 INIT_LIST_HEAD(&dc->list);
c81abe34 828 dc->bdev = bdev;
b01a9201 829 dc->lstart = lstart;
c81abe34 830 dc->start = start;
b01a9201 831 dc->len = len;
ec9895ad 832 dc->ref = 0;
15469963 833 dc->state = D_PREP;
c81abe34 834 dc->error = 0;
b01a9201 835 init_completion(&dc->wait);
22d375dd 836 list_add_tail(&dc->list, pend_list);
5f32366a 837 atomic_inc(&dcc->discard_cmd_cnt);
d84d1cbd 838 dcc->undiscard_blks += len;
004b6862
CY		 839
840 return dc;
841}
842
843static struct discard_cmd *__attach_discard_cmd(struct f2fs_sb_info *sbi,
844 struct block_device *bdev, block_t lstart,
845 block_t start, block_t len,
846 struct rb_node *parent, struct rb_node **p)
847{
848 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
849 struct discard_cmd *dc;
850
851 dc = __create_discard_cmd(sbi, bdev, lstart, start, len);
852
853 rb_link_node(&dc->rb_node, parent, p);
854 rb_insert_color(&dc->rb_node, &dcc->root);
855
856 return dc;
15469963
JK		 857}
858
004b6862
CY		 859static void __detach_discard_cmd(struct discard_cmd_control *dcc,
860 struct discard_cmd *dc)
15469963 861{
dcc9165d 862 if (dc->state == D_DONE)
004b6862
CY		 863 atomic_dec(&dcc->issing_discard);
864
865 list_del(&dc->list);
866 rb_erase(&dc->rb_node, &dcc->root);
d84d1cbd 867 dcc->undiscard_blks -= dc->len;
004b6862
CY		 868
869 kmem_cache_free(discard_cmd_slab, dc);
870
871 atomic_dec(&dcc->discard_cmd_cnt);
872}
873
874static void __remove_discard_cmd(struct f2fs_sb_info *sbi,
875 struct discard_cmd *dc)
876{
877 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
dcc9165d 878
2ec6f2ef
CY		 879 trace_f2fs_remove_discard(dc->bdev, dc->start, dc->len);
880
d9703d90
CY		 881 f2fs_bug_on(sbi, dc->ref);
882
c81abe34
JK		 883 if (dc->error == -EOPNOTSUPP)
884 dc->error = 0;
15469963 885
c81abe34 886 if (dc->error)
15469963 887 f2fs_msg(sbi->sb, KERN_INFO,
04dfc230
CY		 888 "Issue discard(%u, %u, %u) failed, ret: %d",
889 dc->lstart, dc->start, dc->len, dc->error);
004b6862 890 __detach_discard_cmd(dcc, dc);
275b66b0
CY		 891}
892
c81abe34
JK		 893static void f2fs_submit_discard_endio(struct bio *bio)
894{
895 struct discard_cmd *dc = (struct discard_cmd *)bio->bi_private;
896
4e4cbee9 897 dc->error = blk_status_to_errno(bio->bi_status);
c81abe34 898 dc->state = D_DONE;
e31b9821 899 complete_all(&dc->wait);
c81abe34
JK		 900 bio_put(bio);
901}
902
94b1e10e 903static void __check_sit_bitmap(struct f2fs_sb_info *sbi,
6915ea9d
CY		 904 block_t start, block_t end)
905{
906#ifdef CONFIG_F2FS_CHECK_FS
907 struct seg_entry *sentry;
908 unsigned int segno;
909 block_t blk = start;
910 unsigned long offset, size, max_blocks = sbi->blocks_per_seg;
911 unsigned long *map;
912
913 while (blk < end) {
914 segno = GET_SEGNO(sbi, blk);
915 sentry = get_seg_entry(sbi, segno);
916 offset = GET_BLKOFF_FROM_SEG0(sbi, blk);
917
008396e1
YS		 918 if (end < START_BLOCK(sbi, segno + 1))
919 size = GET_BLKOFF_FROM_SEG0(sbi, end);
920 else
921 size = max_blocks;
6915ea9d
CY		 922 map = (unsigned long *)(sentry->cur_valid_map);
923 offset = __find_rev_next_bit(map, size, offset);
924 f2fs_bug_on(sbi, offset != size);
008396e1 925 blk = START_BLOCK(sbi, segno + 1);
6915ea9d
CY		 926 }
927#endif
928}
929
8bb4f253
JK		 930static void __init_discard_policy(struct f2fs_sb_info *sbi,
931 struct discard_policy *dpolicy,
932 int discard_type, unsigned int granularity)
933{
934 /* common policy */
935 dpolicy->type = discard_type;
936 dpolicy->sync = true;
937 dpolicy->granularity = granularity;
938
939 dpolicy->max_requests = DEF_MAX_DISCARD_REQUEST;
940 dpolicy->io_aware_gran = MAX_PLIST_NUM;
941
942 if (discard_type == DPOLICY_BG) {
943 dpolicy->min_interval = DEF_MIN_DISCARD_ISSUE_TIME;
f9d1dced 944 dpolicy->mid_interval = DEF_MID_DISCARD_ISSUE_TIME;
8bb4f253
JK		 945 dpolicy->max_interval = DEF_MAX_DISCARD_ISSUE_TIME;
946 dpolicy->io_aware = true;
cba60849 947 dpolicy->sync = false;
8bb4f253
JK		 948 if (utilization(sbi) > DEF_DISCARD_URGENT_UTIL) {
949 dpolicy->granularity = 1;
950 dpolicy->max_interval = DEF_MIN_DISCARD_ISSUE_TIME;
951 }
952 } else if (discard_type == DPOLICY_FORCE) {
953 dpolicy->min_interval = DEF_MIN_DISCARD_ISSUE_TIME;
f9d1dced 954 dpolicy->mid_interval = DEF_MID_DISCARD_ISSUE_TIME;
8bb4f253
JK		 955 dpolicy->max_interval = DEF_MAX_DISCARD_ISSUE_TIME;
956 dpolicy->io_aware = false;
957 } else if (discard_type == DPOLICY_FSTRIM) {
958 dpolicy->io_aware = false;
959 } else if (discard_type == DPOLICY_UMOUNT) {
241b493d 960 dpolicy->max_requests = UINT_MAX;
8bb4f253
JK		 961 dpolicy->io_aware = false;
962 }
963}
964
965
c81abe34
JK		 966/* this function is copied from blkdev_issue_discard from block/blk-lib.c */
967static void __submit_discard_cmd(struct f2fs_sb_info *sbi,
78997b56
CY		 968 struct discard_policy *dpolicy,
969 struct discard_cmd *dc)
c81abe34
JK		 970{
971 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
78997b56
CY		 972 struct list_head *wait_list = (dpolicy->type == DPOLICY_FSTRIM) ?
973 &(dcc->fstrim_list) : &(dcc->wait_list);
c81abe34 974 struct bio *bio = NULL;
78997b56 975 int flag = dpolicy->sync ? REQ_SYNC : 0;
c81abe34
JK		 976
977 if (dc->state != D_PREP)
978 return;
979
d6184774
YH		 980 if (is_sbi_flag_set(sbi, SBI_NEED_FSCK))
981 return;
982
0243a5f9
CY		 983 trace_f2fs_issue_discard(dc->bdev, dc->start, dc->len);
984
c81abe34
JK		 985 dc->error = __blkdev_issue_discard(dc->bdev,
986 SECTOR_FROM_BLOCK(dc->start),
987 SECTOR_FROM_BLOCK(dc->len),
988 GFP_NOFS, 0, &bio);
989 if (!dc->error) {
990 /* should keep before submission to avoid D_DONE right away */
991 dc->state = D_SUBMIT;
8b8dd65f
CY		 992 atomic_inc(&dcc->issued_discard);
993 atomic_inc(&dcc->issing_discard);
c81abe34
JK		 994 if (bio) {
995 bio->bi_private = dc;
996 bio->bi_end_io = f2fs_submit_discard_endio;
ecc9aa00 997 bio->bi_opf |= flag;
c81abe34 998 submit_bio(bio);
8412663d 999 list_move_tail(&dc->list, wait_list);
6915ea9d 1000 __check_sit_bitmap(sbi, dc->start, dc->start + dc->len);
b0af6d49
CY		 1001
1002 f2fs_update_iostat(sbi, FS_DISCARD, 1);
c81abe34
JK		 1003 }
1004 } else {
1005 __remove_discard_cmd(sbi, dc);
1006 }
1007}
1008
004b6862
CY		 1009static struct discard_cmd *__insert_discard_tree(struct f2fs_sb_info *sbi,
1010 struct block_device *bdev, block_t lstart,
1011 block_t start, block_t len,
1012 struct rb_node **insert_p,
1013 struct rb_node *insert_parent)
c81abe34 1014{
004b6862 1015 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
dca6951f 1016 struct rb_node **p;
004b6862
CY		 1017 struct rb_node *parent = NULL;
1018 struct discard_cmd *dc = NULL;
1019
1020 if (insert_p && insert_parent) {
1021 parent = insert_parent;
1022 p = insert_p;
1023 goto do_insert;
1024 }
c81abe34 1025
4d57b86d 1026 p = f2fs_lookup_rb_tree_for_insert(sbi, &dcc->root, &parent, lstart);
004b6862
CY		 1027do_insert:
1028 dc = __attach_discard_cmd(sbi, bdev, lstart, start, len, parent, p);
1029 if (!dc)
1030 return NULL;
c81abe34 1031
004b6862 1032 return dc;
c81abe34
JK		 1033}
1034
ba48a33e
CY		 1035static void __relocate_discard_cmd(struct discard_cmd_control *dcc,
1036 struct discard_cmd *dc)
1037{
1038 list_move_tail(&dc->list, &dcc->pend_list[plist_idx(dc->len)]);
1039}
1040
3d6a650f
YH		 1041static void __punch_discard_cmd(struct f2fs_sb_info *sbi,
1042 struct discard_cmd *dc, block_t blkaddr)
1043{
ba48a33e 1044 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
004b6862
CY		 1045 struct discard_info di = dc->di;
1046 bool modified = false;
3d6a650f 1047
004b6862 1048 if (dc->state == D_DONE || dc->len == 1) {
3d6a650f
YH		 1049 __remove_discard_cmd(sbi, dc);
1050 return;
1051 }
1052
d84d1cbd
CY		 1053 dcc->undiscard_blks -= di.len;
1054
004b6862 1055 if (blkaddr > di.lstart) {
3d6a650f 1056 dc->len = blkaddr - dc->lstart;
d84d1cbd 1057 dcc->undiscard_blks += dc->len;
ba48a33e 1058 __relocate_discard_cmd(dcc, dc);
004b6862
CY		 1059 modified = true;
1060 }
1061
1062 if (blkaddr < di.lstart + di.len - 1) {
1063 if (modified) {
1064 __insert_discard_tree(sbi, dc->bdev, blkaddr + 1,
1065 di.start + blkaddr + 1 - di.lstart,
1066 di.lstart + di.len - 1 - blkaddr,
1067 NULL, NULL);
1068 } else {
1069 dc->lstart++;
1070 dc->len--;
1071 dc->start++;
d84d1cbd 1072 dcc->undiscard_blks += dc->len;
ba48a33e 1073 __relocate_discard_cmd(dcc, dc);
004b6862 1074 }
3d6a650f
YH		 1075 }
1076}
1077
004b6862
CY		 1078static void __update_discard_tree_range(struct f2fs_sb_info *sbi,
1079 struct block_device *bdev, block_t lstart,
1080 block_t start, block_t len)
275b66b0 1081{
0b54fb84 1082 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
004b6862
CY		 1083 struct discard_cmd *prev_dc = NULL, *next_dc = NULL;
1084 struct discard_cmd *dc;
1085 struct discard_info di = {0};
1086 struct rb_node **insert_p = NULL, *insert_parent = NULL;
1087 block_t end = lstart + len;
275b66b0 1088
15469963 1089 mutex_lock(&dcc->cmd_lock);
40465257 1090
4d57b86d 1091 dc = (struct discard_cmd *)f2fs_lookup_rb_tree_ret(&dcc->root,
004b6862
CY		 1092 NULL, lstart,
1093 (struct rb_entry **)&prev_dc,
1094 (struct rb_entry **)&next_dc,
1095 &insert_p, &insert_parent, true);
1096 if (dc)
1097 prev_dc = dc;
1098
1099 if (!prev_dc) {
1100 di.lstart = lstart;
1101 di.len = next_dc ? next_dc->lstart - lstart : len;
1102 di.len = min(di.len, len);
1103 di.start = start;
22d375dd 1104 }
15469963 1105
004b6862
CY		 1106 while (1) {
1107 struct rb_node *node;
1108 bool merged = false;
1109 struct discard_cmd *tdc = NULL;
1110
1111 if (prev_dc) {
1112 di.lstart = prev_dc->lstart + prev_dc->len;
1113 if (di.lstart < lstart)
1114 di.lstart = lstart;
1115 if (di.lstart >= end)
1116 break;
1117
1118 if (!next_dc || next_dc->lstart > end)
1119 di.len = end - di.lstart;
1120 else
1121 di.len = next_dc->lstart - di.lstart;
1122 di.start = start + di.lstart - lstart;
1123 }
1124
1125 if (!di.len)
1126 goto next;
1127
1128 if (prev_dc && prev_dc->state == D_PREP &&
1129 prev_dc->bdev == bdev &&
1130 __is_discard_back_mergeable(&di, &prev_dc->di)) {
1131 prev_dc->di.len += di.len;
d84d1cbd 1132 dcc->undiscard_blks += di.len;
ba48a33e 1133 __relocate_discard_cmd(dcc, prev_dc);
004b6862
CY		 1134 di = prev_dc->di;
1135 tdc = prev_dc;
1136 merged = true;
1137 }
1138
1139 if (next_dc && next_dc->state == D_PREP &&
1140 next_dc->bdev == bdev &&
1141 __is_discard_front_mergeable(&di, &next_dc->di)) {
1142 next_dc->di.lstart = di.lstart;
1143 next_dc->di.len += di.len;
1144 next_dc->di.start = di.start;
d84d1cbd 1145 dcc->undiscard_blks += di.len;
ba48a33e 1146 __relocate_discard_cmd(dcc, next_dc);
004b6862
CY		 1147 if (tdc)
1148 __remove_discard_cmd(sbi, tdc);
004b6862 1149 merged = true;
4e6a8d9b 1150 }
004b6862 1151
df0f6b44 1152 if (!merged) {
004b6862
CY		 1153 __insert_discard_tree(sbi, bdev, di.lstart, di.start,
1154 di.len, NULL, NULL);
df0f6b44 1155 }
004b6862
CY		 1156 next:
1157 prev_dc = next_dc;
1158 if (!prev_dc)
1159 break;
1160
1161 node = rb_next(&prev_dc->rb_node);
1162 next_dc = rb_entry_safe(node, struct discard_cmd, rb_node);
1163 }
1164
1165 mutex_unlock(&dcc->cmd_lock);
1166}
1167
1168static int __queue_discard_cmd(struct f2fs_sb_info *sbi,
1169 struct block_device *bdev, block_t blkstart, block_t blklen)
1170{
1171 block_t lblkstart = blkstart;
1172
0243a5f9 1173 trace_f2fs_queue_discard(bdev, blkstart, blklen);
004b6862
CY		 1174
1175 if (sbi->s_ndevs) {
1176 int devi = f2fs_target_device_index(sbi, blkstart);
1177
1178 blkstart -= FDEV(devi).start_blk;
1179 }
1180 __update_discard_tree_range(sbi, bdev, lblkstart, blkstart, blklen);
004b6862
CY		 1181 return 0;
1182}
1183
78997b56
CY		 1184static int __issue_discard_cmd(struct f2fs_sb_info *sbi,
1185 struct discard_policy *dpolicy)
bd5b0738
CY		 1186{
1187 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
1188 struct list_head *pend_list;
1189 struct discard_cmd *dc, *tmp;
1190 struct blk_plug plug;
78997b56 1191 int i, iter = 0, issued = 0;
e6c6de18 1192 bool io_interrupted = false;
bd5b0738 1193
78997b56
CY		 1194 for (i = MAX_PLIST_NUM - 1; i >= 0; i--) {
1195 if (i + 1 < dpolicy->granularity)
1196 break;
bd5b0738 1197 pend_list = &dcc->pend_list[i];
33da62cf
CY		 1198
1199 mutex_lock(&dcc->cmd_lock);
49c60c67
CY		 1200 if (list_empty(pend_list))
1201 goto next;
4d57b86d
CY		 1202 f2fs_bug_on(sbi,
1203 !f2fs_check_rb_tree_consistence(sbi, &dcc->root));
33da62cf 1204 blk_start_plug(&plug);
bd5b0738
CY		 1205 list_for_each_entry_safe(dc, tmp, pend_list, list) {
1206 f2fs_bug_on(sbi, dc->state != D_PREP);
1207
ecc9aa00
CY		 1208 if (dpolicy->io_aware && i < dpolicy->io_aware_gran &&
1209 !is_idle(sbi)) {
e6c6de18 1210 io_interrupted = true;
ecc9aa00 1211 goto skip;
969d1b18 1212 }
e6c6de18 1213
78997b56 1214 __submit_discard_cmd(sbi, dpolicy, dc);
ecc9aa00
CY		 1215 issued++;
1216skip:
1217 if (++iter >= dpolicy->max_requests)
33da62cf 1218 break;
bd5b0738 1219 }
33da62cf 1220 blk_finish_plug(&plug);
49c60c67 1221next:
33da62cf
CY		 1222 mutex_unlock(&dcc->cmd_lock);
1223
1224 if (iter >= dpolicy->max_requests)
1225 break;
bd5b0738 1226 }
969d1b18 1227
e6c6de18
CY		 1228 if (!issued && io_interrupted)
1229 issued = -1;
1230
969d1b18
CY		 1231 return issued;
1232}
1233
cf5c759f 1234static bool __drop_discard_cmd(struct f2fs_sb_info *sbi)
969d1b18
CY		 1235{
1236 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
1237 struct list_head *pend_list;
1238 struct discard_cmd *dc, *tmp;
1239 int i;
cf5c759f 1240 bool dropped = false;
969d1b18
CY		 1241
1242 mutex_lock(&dcc->cmd_lock);
1243 for (i = MAX_PLIST_NUM - 1; i >= 0; i--) {
1244 pend_list = &dcc->pend_list[i];
1245 list_for_each_entry_safe(dc, tmp, pend_list, list) {
1246 f2fs_bug_on(sbi, dc->state != D_PREP);
1247 __remove_discard_cmd(sbi, dc);
cf5c759f 1248 dropped = true;
969d1b18
CY		 1249 }
1250 }
1251 mutex_unlock(&dcc->cmd_lock);
cf5c759f
CY		 1252
1253 return dropped;
bd5b0738
CY		 1254}
1255
4d57b86d 1256void f2fs_drop_discard_cmd(struct f2fs_sb_info *sbi)
7950e9ac
CY		 1257{
1258 __drop_discard_cmd(sbi);
1259}
1260
0ea80512 1261static unsigned int __wait_one_discard_bio(struct f2fs_sb_info *sbi,
2a510c00
CY		 1262 struct discard_cmd *dc)
1263{
1264 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
0ea80512 1265 unsigned int len = 0;
2a510c00
CY		 1266
1267 wait_for_completion_io(&dc->wait);
1268 mutex_lock(&dcc->cmd_lock);
1269 f2fs_bug_on(sbi, dc->state != D_DONE);
1270 dc->ref--;
0ea80512
CY		 1271 if (!dc->ref) {
1272 if (!dc->error)
1273 len = dc->len;
2a510c00 1274 __remove_discard_cmd(sbi, dc);
0ea80512 1275 }
2a510c00 1276 mutex_unlock(&dcc->cmd_lock);
0ea80512
CY		 1277
1278 return len;
2a510c00
CY		 1279}
1280
0ea80512 1281static unsigned int __wait_discard_cmd_range(struct f2fs_sb_info *sbi,
78997b56
CY		 1282 struct discard_policy *dpolicy,
1283 block_t start, block_t end)
63a94fa1
CY		 1284{
1285 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
78997b56
CY		 1286 struct list_head *wait_list = (dpolicy->type == DPOLICY_FSTRIM) ?
1287 &(dcc->fstrim_list) : &(dcc->wait_list);
63a94fa1 1288 struct discard_cmd *dc, *tmp;
6afae633 1289 bool need_wait;
0ea80512 1290 unsigned int trimmed = 0;
6afae633
CY		 1291
1292next:
1293 need_wait = false;
63a94fa1
CY		 1294
1295 mutex_lock(&dcc->cmd_lock);
1296 list_for_each_entry_safe(dc, tmp, wait_list, list) {
8412663d
CY		 1297 if (dc->lstart + dc->len <= start || end <= dc->lstart)
1298 continue;
78997b56 1299 if (dc->len < dpolicy->granularity)
8412663d 1300 continue;
78997b56 1301 if (dc->state == D_DONE && !dc->ref) {
63a94fa1 1302 wait_for_completion_io(&dc->wait);
0ea80512
CY		 1303 if (!dc->error)
1304 trimmed += dc->len;
63a94fa1 1305 __remove_discard_cmd(sbi, dc);
6afae633
CY		 1306 } else {
1307 dc->ref++;
1308 need_wait = true;
1309 break;
63a94fa1
CY		 1310 }
1311 }
1312 mutex_unlock(&dcc->cmd_lock);
6afae633
CY		 1313
1314 if (need_wait) {
0ea80512 1315 trimmed += __wait_one_discard_bio(sbi, dc);
6afae633
CY		 1316 goto next;
1317 }
0ea80512
CY		 1318
1319 return trimmed;
63a94fa1
CY		 1320}
1321
78997b56
CY		 1322static void __wait_all_discard_cmd(struct f2fs_sb_info *sbi,
1323 struct discard_policy *dpolicy)
8412663d 1324{
9a997188
JK		 1325 struct discard_policy dp;
1326
1327 if (dpolicy) {
1328 __wait_discard_cmd_range(sbi, dpolicy, 0, UINT_MAX);
1329 return;
1330 }
1331
1332 /* wait all */
8bb4f253 1333 __init_discard_policy(sbi, &dp, DPOLICY_FSTRIM, 1);
9a997188 1334 __wait_discard_cmd_range(sbi, &dp, 0, UINT_MAX);
8bb4f253 1335 __init_discard_policy(sbi, &dp, DPOLICY_UMOUNT, 1);
9a997188 1336 __wait_discard_cmd_range(sbi, &dp, 0, UINT_MAX);
8412663d
CY		 1337}
1338
004b6862 1339/* This should be covered by global mutex, &sit_i->sentry_lock */
94b1e10e 1340static void f2fs_wait_discard_bio(struct f2fs_sb_info *sbi, block_t blkaddr)
004b6862
CY		 1341{
1342 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
1343 struct discard_cmd *dc;
ec9895ad 1344 bool need_wait = false;
004b6862
CY		 1345
1346 mutex_lock(&dcc->cmd_lock);
4d57b86d
CY		 1347 dc = (struct discard_cmd *)f2fs_lookup_rb_tree(&dcc->root,
1348 NULL, blkaddr);
004b6862 1349 if (dc) {
ec9895ad
CY		 1350 if (dc->state == D_PREP) {
1351 __punch_discard_cmd(sbi, dc, blkaddr);
1352 } else {
1353 dc->ref++;
1354 need_wait = true;
1355 }
275b66b0 1356 }
d431413f 1357 mutex_unlock(&dcc->cmd_lock);
ec9895ad 1358
2a510c00
CY		 1359 if (need_wait)
1360 __wait_one_discard_bio(sbi, dc);
d431413f
CY		 1361}
1362
4d57b86d 1363void f2fs_stop_discard_thread(struct f2fs_sb_info *sbi)
cce13252
CY		 1364{
1365 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
1366
1367 if (dcc && dcc->f2fs_issue_discard) {
1368 struct task_struct *discard_thread = dcc->f2fs_issue_discard;
1369
1370 dcc->f2fs_issue_discard = NULL;
1371 kthread_stop(discard_thread);
ec9895ad 1372 }
d431413f
CY		 1373}
1374
8412663d 1375/* This comes from f2fs_put_super */
cf5c759f 1376bool f2fs_wait_discard_bios(struct f2fs_sb_info *sbi)
969d1b18
CY		 1377{
1378 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
78997b56 1379 struct discard_policy dpolicy;
cf5c759f 1380 bool dropped;
969d1b18 1381
8bb4f253
JK		 1382 __init_discard_policy(sbi, &dpolicy, DPOLICY_UMOUNT,
1383 dcc->discard_granularity);
78997b56 1384 __issue_discard_cmd(sbi, &dpolicy);
cf5c759f 1385 dropped = __drop_discard_cmd(sbi);
cf5c759f 1386
9a997188
JK		 1387 /* just to make sure there is no pending discard commands */
1388 __wait_all_discard_cmd(sbi, NULL);
cf5c759f 1389 return dropped;
969d1b18
CY		 1390}
1391
15469963
JK		 1392static int issue_discard_thread(void *data)
1393{
1394 struct f2fs_sb_info *sbi = data;
1395 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
1396 wait_queue_head_t *q = &dcc->discard_wait_queue;
78997b56 1397 struct discard_policy dpolicy;
969d1b18
CY		 1398 unsigned int wait_ms = DEF_MIN_DISCARD_ISSUE_TIME;
1399 int issued;
15469963 1400
1d7be270 1401 set_freezable();
15469963 1402
1d7be270 1403 do {
8bb4f253 1404 __init_discard_policy(sbi, &dpolicy, DPOLICY_BG,
78997b56
CY		 1405 dcc->discard_granularity);
1406
969d1b18
CY		 1407 wait_event_interruptible_timeout(*q,
1408 kthread_should_stop() || freezing(current) ||
1409 dcc->discard_wake,
1410 msecs_to_jiffies(wait_ms));
35a9a766
SY		 1411
1412 if (dcc->discard_wake)
1413 dcc->discard_wake = 0;
1414
1d7be270
JK		 1415 if (try_to_freeze())
1416 continue;
3b60d802
CY		 1417 if (f2fs_readonly(sbi->sb))
1418 continue;
1d7be270
JK		 1419 if (kthread_should_stop())
1420 return 0;
d6184774
YH		 1421 if (is_sbi_flag_set(sbi, SBI_NEED_FSCK)) {
1422 wait_ms = dpolicy.max_interval;
1423 continue;
1424 }
15469963 1425
5b0e9539 1426 if (sbi->gc_mode == GC_URGENT)
8bb4f253 1427 __init_discard_policy(sbi, &dpolicy, DPOLICY_FORCE, 1);
969d1b18 1428
dc6febb6
CY		 1429 sb_start_intwrite(sbi->sb);
1430
78997b56 1431 issued = __issue_discard_cmd(sbi, &dpolicy);
f9d1dced 1432 if (issued > 0) {
78997b56
CY		 1433 __wait_all_discard_cmd(sbi, &dpolicy);
1434 wait_ms = dpolicy.min_interval;
f9d1dced
YH		 1435 } else if (issued == -1){
1436 wait_ms = dpolicy.mid_interval;
969d1b18 1437 } else {
78997b56 1438 wait_ms = dpolicy.max_interval;
969d1b18 1439 }
1d7be270 1440
dc6febb6 1441 sb_end_intwrite(sbi->sb);
1d7be270 1442
1d7be270
JK		 1443 } while (!kthread_should_stop());
1444 return 0;
15469963
JK		 1445}
1446
f46e8809 1447#ifdef CONFIG_BLK_DEV_ZONED
3c62be17
JK		 1448static int __f2fs_issue_discard_zone(struct f2fs_sb_info *sbi,
1449 struct block_device *bdev, block_t blkstart, block_t blklen)
f46e8809 1450{
92592285 1451 sector_t sector, nr_sects;
10a875f8 1452 block_t lblkstart = blkstart;
3c62be17
JK		 1453 int devi = 0;
1454
1455 if (sbi->s_ndevs) {
1456 devi = f2fs_target_device_index(sbi, blkstart);
1457 blkstart -= FDEV(devi).start_blk;
1458 }
f46e8809
DLM		 1459
1460 /*
1461 * We need to know the type of the zone: for conventional zones,
1462 * use regular discard if the drive supports it. For sequential
1463 * zones, reset the zone write pointer.
1464 */
3c62be17 1465 switch (get_blkz_type(sbi, bdev, blkstart)) {
f46e8809
DLM		 1466
1467 case BLK_ZONE_TYPE_CONVENTIONAL:
1468 if (!blk_queue_discard(bdev_get_queue(bdev)))
1469 return 0;
c81abe34 1470 return __queue_discard_cmd(sbi, bdev, lblkstart, blklen);
f46e8809
DLM		 1471 case BLK_ZONE_TYPE_SEQWRITE_REQ:
1472 case BLK_ZONE_TYPE_SEQWRITE_PREF:
92592285
JK		 1473 sector = SECTOR_FROM_BLOCK(blkstart);
1474 nr_sects = SECTOR_FROM_BLOCK(blklen);
1475
1476 if (sector & (bdev_zone_sectors(bdev) - 1) ||
1477 nr_sects != bdev_zone_sectors(bdev)) {
1478 f2fs_msg(sbi->sb, KERN_INFO,
1479 "(%d) %s: Unaligned discard attempted (block %x + %x)",
1480 devi, sbi->s_ndevs ? FDEV(devi).path: "",
1481 blkstart, blklen);
1482 return -EIO;
1483 }
d50aaeec 1484 trace_f2fs_issue_reset_zone(bdev, blkstart);
f46e8809
DLM		 1485 return blkdev_reset_zones(bdev, sector,
1486 nr_sects, GFP_NOFS);
1487 default:
1488 /* Unknown zone type: broken device ? */
1489 return -EIO;
1490 }
1491}
1492#endif
1493
3c62be17
JK		 1494static int __issue_discard_async(struct f2fs_sb_info *sbi,
1495 struct block_device *bdev, block_t blkstart, block_t blklen)
1496{
1497#ifdef CONFIG_BLK_DEV_ZONED
ccd31cb2 1498 if (f2fs_sb_has_blkzoned(sbi->sb) &&
3c62be17
JK		 1499 bdev_zoned_model(bdev) != BLK_ZONED_NONE)
1500 return __f2fs_issue_discard_zone(sbi, bdev, blkstart, blklen);
1501#endif
c81abe34 1502 return __queue_discard_cmd(sbi, bdev, blkstart, blklen);
3c62be17
JK		 1503}
1504
1e87a78d 1505static int f2fs_issue_discard(struct f2fs_sb_info *sbi,
37208879
JK		 1506 block_t blkstart, block_t blklen)
1507{
3c62be17
JK		 1508 sector_t start = blkstart, len = 0;
1509 struct block_device *bdev;
a66cdd98
JK		 1510 struct seg_entry *se;
1511 unsigned int offset;
1512 block_t i;
3c62be17
JK		 1513 int err = 0;
1514
1515 bdev = f2fs_target_device(sbi, blkstart, NULL);
1516
1517 for (i = blkstart; i < blkstart + blklen; i++, len++) {
1518 if (i != start) {
1519 struct block_device *bdev2 =
1520 f2fs_target_device(sbi, i, NULL);
1521
1522 if (bdev2 != bdev) {
1523 err = __issue_discard_async(sbi, bdev,
1524 start, len);
1525 if (err)
1526 return err;
1527 bdev = bdev2;
1528 start = i;
1529 len = 0;
1530 }
1531 }
a66cdd98 1532
a66cdd98
JK		 1533 se = get_seg_entry(sbi, GET_SEGNO(sbi, i));
1534 offset = GET_BLKOFF_FROM_SEG0(sbi, i);
1535
1536 if (!f2fs_test_and_set_bit(offset, se->discard_map))
1537 sbi->discard_blks--;
1538 }
f46e8809 1539
3c62be17
JK		 1540 if (len)
1541 err = __issue_discard_async(sbi, bdev, start, len);
1542 return err;
1e87a78d
JK		 1543}
1544
25290fa5
JK		 1545static bool add_discard_addrs(struct f2fs_sb_info *sbi, struct cp_control *cpc,
1546 bool check_only)
adf4983b 1547{
b2955550
JK		 1548 int entries = SIT_VBLOCK_MAP_SIZE / sizeof(unsigned long);
1549 int max_blocks = sbi->blocks_per_seg;
4b2fecc8 1550 struct seg_entry *se = get_seg_entry(sbi, cpc->trim_start);
b2955550
JK		 1551 unsigned long *cur_map = (unsigned long *)se->cur_valid_map;
1552 unsigned long *ckpt_map = (unsigned long *)se->ckpt_valid_map;
a66cdd98 1553 unsigned long *discard_map = (unsigned long *)se->discard_map;
60a3b782 1554 unsigned long *dmap = SIT_I(sbi)->tmp_map;
b2955550 1555 unsigned int start = 0, end = -1;
c473f1a9 1556 bool force = (cpc->reason & CP_DISCARD);
a7eeb823 1557 struct discard_entry *de = NULL;
46f84c2c 1558 struct list_head *head = &SM_I(sbi)->dcc_info->entry_list;
b2955550
JK		 1559 int i;
1560
3e025740 1561 if (se->valid_blocks == max_blocks || !f2fs_discard_en(sbi))
25290fa5 1562 return false;
b2955550 1563
a66cdd98
JK		 1564 if (!force) {
1565 if (!test_opt(sbi, DISCARD) || !se->valid_blocks ||
0b54fb84
JK		 1566 SM_I(sbi)->dcc_info->nr_discards >=
1567 SM_I(sbi)->dcc_info->max_discards)
25290fa5 1568 return false;
4b2fecc8
JK		 1569 }
1570
b2955550
JK		 1571 /* SIT_VBLOCK_MAP_SIZE should be multiple of sizeof(unsigned long) */
1572 for (i = 0; i < entries; i++)
a66cdd98 1573 dmap[i] = force ? ~ckpt_map[i] & ~discard_map[i] :
d7bc2484 1574 (cur_map[i] ^ ckpt_map[i]) & ckpt_map[i];
b2955550 1575
0b54fb84
JK		 1576 while (force || SM_I(sbi)->dcc_info->nr_discards <=
1577 SM_I(sbi)->dcc_info->max_discards) {
b2955550
JK		 1578 start = __find_rev_next_bit(dmap, max_blocks, end + 1);
1579 if (start >= max_blocks)
1580 break;
1581
1582 end = __find_rev_next_zero_bit(dmap, max_blocks, start + 1);
c7b41e16
YH		 1583 if (force && start && end != max_blocks
1584 && (end - start) < cpc->trim_minlen)
1585 continue;
1586
25290fa5
JK		 1587 if (check_only)
1588 return true;
1589
a7eeb823
CY		 1590 if (!de) {
1591 de = f2fs_kmem_cache_alloc(discard_entry_slab,
1592 GFP_F2FS_ZERO);
1593 de->start_blkaddr = START_BLOCK(sbi, cpc->trim_start);
1594 list_add_tail(&de->list, head);
1595 }
1596
1597 for (i = start; i < end; i++)
1598 __set_bit_le(i, (void *)de->discard_map);
1599
1600 SM_I(sbi)->dcc_info->nr_discards += end - start;
b2955550 1601 }
25290fa5 1602 return false;
b2955550
JK		 1603}
1604
af8ff65b
CY		 1605static void release_discard_addr(struct discard_entry *entry)
1606{
1607 list_del(&entry->list);
1608 kmem_cache_free(discard_entry_slab, entry);
1609}
1610
4d57b86d 1611void f2fs_release_discard_addrs(struct f2fs_sb_info *sbi)
4b2fecc8 1612{
46f84c2c 1613 struct list_head *head = &(SM_I(sbi)->dcc_info->entry_list);
4b2fecc8
JK		 1614 struct discard_entry *entry, *this;
1615
1616 /* drop caches */
af8ff65b
CY		 1617 list_for_each_entry_safe(entry, this, head, list)
1618 release_discard_addr(entry);
4b2fecc8
JK		 1619}
1620
0a8165d7 1621/*
4d57b86d 1622 * Should call f2fs_clear_prefree_segments after checkpoint is done.
351df4b2
JK		 1623 */
1624static void set_prefree_as_free_segments(struct f2fs_sb_info *sbi)
1625{
1626 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
b65ee148 1627 unsigned int segno;
351df4b2
JK		 1628
1629 mutex_lock(&dirty_i->seglist_lock);
7cd8558b 1630 for_each_set_bit(segno, dirty_i->dirty_segmap[PRE], MAIN_SEGS(sbi))
351df4b2 1631 __set_test_and_free(sbi, segno);
351df4b2
JK		 1632 mutex_unlock(&dirty_i->seglist_lock);
1633}
1634
4d57b86d
CY		 1635void f2fs_clear_prefree_segments(struct f2fs_sb_info *sbi,
1636 struct cp_control *cpc)
351df4b2 1637{
969d1b18
CY		 1638 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
1639 struct list_head *head = &dcc->entry_list;
2d7b822a 1640 struct discard_entry *entry, *this;
351df4b2 1641 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
29e59c14 1642 unsigned long *prefree_map = dirty_i->dirty_segmap[PRE];
29e59c14 1643 unsigned int start = 0, end = -1;
36abef4e 1644 unsigned int secno, start_segno;
c473f1a9 1645 bool force = (cpc->reason & CP_DISCARD);
351df4b2
JK		 1646
1647 mutex_lock(&dirty_i->seglist_lock);
29e59c14 1648
351df4b2 1649 while (1) {
29e59c14 1650 int i;
7cd8558b
JK		 1651 start = find_next_bit(prefree_map, MAIN_SEGS(sbi), end + 1);
1652 if (start >= MAIN_SEGS(sbi))
351df4b2 1653 break;
7cd8558b
JK		 1654 end = find_next_zero_bit(prefree_map, MAIN_SEGS(sbi),
1655 start + 1);
29e59c14
CL		 1656
1657 for (i = start; i < end; i++)
1658 clear_bit(i, prefree_map);
1659
1660 dirty_i->nr_dirty[PRE] -= end - start;
1661
650d3c4e 1662 if (!test_opt(sbi, DISCARD))
29e59c14 1663 continue;
351df4b2 1664
650d3c4e
YH		 1665 if (force && start >= cpc->trim_start &&
1666 (end - 1) <= cpc->trim_end)
1667 continue;
1668
36abef4e
JK		 1669 if (!test_opt(sbi, LFS) || sbi->segs_per_sec == 1) {
1670 f2fs_issue_discard(sbi, START_BLOCK(sbi, start),
37208879 1671 (end - start) << sbi->log_blocks_per_seg);
36abef4e
JK		 1672 continue;
1673 }
1674next:
4ddb1a4d
JK		 1675 secno = GET_SEC_FROM_SEG(sbi, start);
1676 start_segno = GET_SEG_FROM_SEC(sbi, secno);
36abef4e 1677 if (!IS_CURSEC(sbi, secno) &&
302bd348 1678 !get_valid_blocks(sbi, start, true))
36abef4e
JK		 1679 f2fs_issue_discard(sbi, START_BLOCK(sbi, start_segno),
1680 sbi->segs_per_sec << sbi->log_blocks_per_seg);
1681
1682 start = start_segno + sbi->segs_per_sec;
1683 if (start < end)
1684 goto next;
8b107f5b
JK		 1685 else
1686 end = start - 1;
351df4b2
JK		 1687 }
1688 mutex_unlock(&dirty_i->seglist_lock);
b2955550
JK		 1689
1690 /* send small discards */
2d7b822a 1691 list_for_each_entry_safe(entry, this, head, list) {
a7eeb823
CY		 1692 unsigned int cur_pos = 0, next_pos, len, total_len = 0;
1693 bool is_valid = test_bit_le(0, entry->discard_map);
1694
1695find_next:
1696 if (is_valid) {
1697 next_pos = find_next_zero_bit_le(entry->discard_map,
1698 sbi->blocks_per_seg, cur_pos);
1699 len = next_pos - cur_pos;
1700
ccd31cb2 1701 if (f2fs_sb_has_blkzoned(sbi->sb) ||
acfd2810 1702 (force && len < cpc->trim_minlen))
a7eeb823
CY		 1703 goto skip;
1704
1705 f2fs_issue_discard(sbi, entry->start_blkaddr + cur_pos,
1706 len);
a7eeb823
CY		 1707 total_len += len;
1708 } else {
1709 next_pos = find_next_bit_le(entry->discard_map,
1710 sbi->blocks_per_seg, cur_pos);
1711 }
836b5a63 1712skip:
a7eeb823
CY		 1713 cur_pos = next_pos;
1714 is_valid = !is_valid;
1715
1716 if (cur_pos < sbi->blocks_per_seg)
1717 goto find_next;
1718
af8ff65b 1719 release_discard_addr(entry);
969d1b18 1720 dcc->nr_discards -= total_len;
b2955550 1721 }
34e159da 1722
01983c71 1723 wake_up_discard_thread(sbi, false);
351df4b2
JK		 1724}
1725
8ed59745 1726static int create_discard_cmd_control(struct f2fs_sb_info *sbi)
0b54fb84 1727{
15469963 1728 dev_t dev = sbi->sb->s_bdev->bd_dev;
0b54fb84 1729 struct discard_cmd_control *dcc;
ba48a33e 1730 int err = 0, i;
0b54fb84
JK		 1731
1732 if (SM_I(sbi)->dcc_info) {
1733 dcc = SM_I(sbi)->dcc_info;
1734 goto init_thread;
1735 }
1736
acbf054d 1737 dcc = f2fs_kzalloc(sbi, sizeof(struct discard_cmd_control), GFP_KERNEL);
0b54fb84
JK		 1738 if (!dcc)
1739 return -ENOMEM;
1740
969d1b18 1741 dcc->discard_granularity = DEFAULT_DISCARD_GRANULARITY;
46f84c2c 1742 INIT_LIST_HEAD(&dcc->entry_list);
78997b56 1743 for (i = 0; i < MAX_PLIST_NUM; i++)
ba48a33e 1744 INIT_LIST_HEAD(&dcc->pend_list[i]);
46f84c2c 1745 INIT_LIST_HEAD(&dcc->wait_list);
8412663d 1746 INIT_LIST_HEAD(&dcc->fstrim_list);
15469963 1747 mutex_init(&dcc->cmd_lock);
8b8dd65f
CY		 1748 atomic_set(&dcc->issued_discard, 0);
1749 atomic_set(&dcc->issing_discard, 0);
5f32366a 1750 atomic_set(&dcc->discard_cmd_cnt, 0);
0b54fb84 1751 dcc->nr_discards = 0;
d618ebaf 1752 dcc->max_discards = MAIN_SEGS(sbi) << sbi->log_blocks_per_seg;
d84d1cbd 1753 dcc->undiscard_blks = 0;
004b6862 1754 dcc->root = RB_ROOT;
0b54fb84 1755
15469963 1756 init_waitqueue_head(&dcc->discard_wait_queue);
0b54fb84
JK		 1757 SM_I(sbi)->dcc_info = dcc;
1758init_thread:
15469963
JK		 1759 dcc->f2fs_issue_discard = kthread_run(issue_discard_thread, sbi,
1760 "f2fs_discard-%u:%u", MAJOR(dev), MINOR(dev));
1761 if (IS_ERR(dcc->f2fs_issue_discard)) {
1762 err = PTR_ERR(dcc->f2fs_issue_discard);
1763 kfree(dcc);
1764 SM_I(sbi)->dcc_info = NULL;
1765 return err;
1766 }
1767
0b54fb84
JK		 1768 return err;
1769}
1770
f099405f 1771static void destroy_discard_cmd_control(struct f2fs_sb_info *sbi)
0b54fb84
JK		 1772{
1773 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
1774
f099405f
CY		 1775 if (!dcc)
1776 return;
1777
4d57b86d 1778 f2fs_stop_discard_thread(sbi);
f099405f
CY		 1779
1780 kfree(dcc);
1781 SM_I(sbi)->dcc_info = NULL;
0b54fb84
JK		 1782}
1783
184a5cd2 1784static bool __mark_sit_entry_dirty(struct f2fs_sb_info *sbi, unsigned int segno)
351df4b2
JK		 1785{
1786 struct sit_info *sit_i = SIT_I(sbi);
184a5cd2
CY		 1787
1788 if (!__test_and_set_bit(segno, sit_i->dirty_sentries_bitmap)) {
351df4b2 1789 sit_i->dirty_sentries++;
184a5cd2
CY		 1790 return false;
1791 }
1792
1793 return true;
351df4b2
JK		 1794}
1795
1796static void __set_sit_entry_type(struct f2fs_sb_info *sbi, int type,
1797 unsigned int segno, int modified)
1798{
1799 struct seg_entry *se = get_seg_entry(sbi, segno);
1800 se->type = type;
1801 if (modified)
1802 __mark_sit_entry_dirty(sbi, segno);
1803}
1804
1805static void update_sit_entry(struct f2fs_sb_info *sbi, block_t blkaddr, int del)
1806{
1807 struct seg_entry *se;
1808 unsigned int segno, offset;
1809 long int new_vblocks;
6415fedc
YS		 1810 bool exist;
1811#ifdef CONFIG_F2FS_CHECK_FS
1812 bool mir_exist;
1813#endif
351df4b2
JK		 1814
1815 segno = GET_SEGNO(sbi, blkaddr);
1816
1817 se = get_seg_entry(sbi, segno);
1818 new_vblocks = se->valid_blocks + del;
491c0854 1819 offset = GET_BLKOFF_FROM_SEG0(sbi, blkaddr);
351df4b2 1820
9850cf4a 1821 f2fs_bug_on(sbi, (new_vblocks >> (sizeof(unsigned short) << 3) ||
351df4b2
JK		 1822 (new_vblocks > sbi->blocks_per_seg)));
1823
1824 se->valid_blocks = new_vblocks;
a1f72ac2
CY		 1825 se->mtime = get_mtime(sbi, false);
1826 if (se->mtime > SIT_I(sbi)->max_mtime)
1827 SIT_I(sbi)->max_mtime = se->mtime;
351df4b2
JK		 1828
1829 /* Update valid block bitmap */
1830 if (del > 0) {
6415fedc 1831 exist = f2fs_test_and_set_bit(offset, se->cur_valid_map);
355e7891 1832#ifdef CONFIG_F2FS_CHECK_FS
6415fedc
YS		 1833 mir_exist = f2fs_test_and_set_bit(offset,
1834 se->cur_valid_map_mir);
1835 if (unlikely(exist != mir_exist)) {
1836 f2fs_msg(sbi->sb, KERN_ERR, "Inconsistent error "
1837 "when setting bitmap, blk:%u, old bit:%d",
1838 blkaddr, exist);
05796763 1839 f2fs_bug_on(sbi, 1);
6415fedc 1840 }
355e7891 1841#endif
6415fedc
YS		 1842 if (unlikely(exist)) {
1843 f2fs_msg(sbi->sb, KERN_ERR,
1844 "Bitmap was wrongly set, blk:%u", blkaddr);
1845 f2fs_bug_on(sbi, 1);
35ee82ca
YS		 1846 se->valid_blocks--;
1847 del = 0;
355e7891 1848 }
6415fedc 1849
3e025740
JK		 1850 if (f2fs_discard_en(sbi) &&
1851 !f2fs_test_and_set_bit(offset, se->discard_map))
a66cdd98 1852 sbi->discard_blks--;
720037f9
JK		 1853
1854 /* don't overwrite by SSR to keep node chain */
5d7881ca 1855 if (IS_NODESEG(se->type)) {
720037f9
JK		 1856 if (!f2fs_test_and_set_bit(offset, se->ckpt_valid_map))
1857 se->ckpt_valid_blocks++;
1858 }
351df4b2 1859 } else {
6415fedc 1860 exist = f2fs_test_and_clear_bit(offset, se->cur_valid_map);
355e7891 1861#ifdef CONFIG_F2FS_CHECK_FS
6415fedc
YS		 1862 mir_exist = f2fs_test_and_clear_bit(offset,
1863 se->cur_valid_map_mir);
1864 if (unlikely(exist != mir_exist)) {
1865 f2fs_msg(sbi->sb, KERN_ERR, "Inconsistent error "
1866 "when clearing bitmap, blk:%u, old bit:%d",
1867 blkaddr, exist);
05796763 1868 f2fs_bug_on(sbi, 1);
6415fedc 1869 }
355e7891 1870#endif
6415fedc
YS		 1871 if (unlikely(!exist)) {
1872 f2fs_msg(sbi->sb, KERN_ERR,
1873 "Bitmap was wrongly cleared, blk:%u", blkaddr);
1874 f2fs_bug_on(sbi, 1);
35ee82ca
YS		 1875 se->valid_blocks++;
1876 del = 0;
355e7891 1877 }
6415fedc 1878
3e025740
JK		 1879 if (f2fs_discard_en(sbi) &&
1880 f2fs_test_and_clear_bit(offset, se->discard_map))
a66cdd98 1881 sbi->discard_blks++;
351df4b2
JK		 1882 }
1883 if (!f2fs_test_bit(offset, se->ckpt_valid_map))
1884 se->ckpt_valid_blocks += del;
1885
1886 __mark_sit_entry_dirty(sbi, segno);
1887
1888 /* update total number of valid blocks to be written in ckpt area */
1889 SIT_I(sbi)->written_valid_blocks += del;
1890
1891 if (sbi->segs_per_sec > 1)
1892 get_sec_entry(sbi, segno)->valid_blocks += del;
1893}
1894
4d57b86d 1895void f2fs_invalidate_blocks(struct f2fs_sb_info *sbi, block_t addr)
351df4b2
JK		 1896{
1897 unsigned int segno = GET_SEGNO(sbi, addr);
1898 struct sit_info *sit_i = SIT_I(sbi);
1899
9850cf4a 1900 f2fs_bug_on(sbi, addr == NULL_ADDR);
351df4b2
JK		 1901 if (addr == NEW_ADDR)
1902 return;
1903
1904 /* add it into sit main buffer */
3d26fa6b 1905 down_write(&sit_i->sentry_lock);
351df4b2
JK		 1906
1907 update_sit_entry(sbi, addr, -1);
1908
1909 /* add it into dirty seglist */
1910 locate_dirty_segment(sbi, segno);
1911
3d26fa6b 1912 up_write(&sit_i->sentry_lock);
351df4b2
JK		 1913}
1914
4d57b86d 1915bool f2fs_is_checkpointed_data(struct f2fs_sb_info *sbi, block_t blkaddr)
6e2c64ad
JK		 1916{
1917 struct sit_info *sit_i = SIT_I(sbi);
1918 unsigned int segno, offset;
1919 struct seg_entry *se;
1920 bool is_cp = false;
1921
7b525dd0 1922 if (!is_valid_blkaddr(blkaddr))
6e2c64ad
JK		 1923 return true;
1924
3d26fa6b 1925 down_read(&sit_i->sentry_lock);
6e2c64ad
JK		 1926
1927 segno = GET_SEGNO(sbi, blkaddr);
1928 se = get_seg_entry(sbi, segno);
1929 offset = GET_BLKOFF_FROM_SEG0(sbi, blkaddr);
1930
1931 if (f2fs_test_bit(offset, se->ckpt_valid_map))
1932 is_cp = true;
1933
3d26fa6b 1934 up_read(&sit_i->sentry_lock);
6e2c64ad
JK		 1935
1936 return is_cp;
1937}
1938
0a8165d7 1939/*
351df4b2
JK		 1940 * This function should be resided under the curseg_mutex lock
1941 */
1942static void __add_sum_entry(struct f2fs_sb_info *sbi, int type,
e79efe3b 1943 struct f2fs_summary *sum)
351df4b2
JK		 1944{
1945 struct curseg_info *curseg = CURSEG_I(sbi, type);
1946 void *addr = curseg->sum_blk;
e79efe3b 1947 addr += curseg->next_blkoff * sizeof(struct f2fs_summary);
351df4b2 1948 memcpy(addr, sum, sizeof(struct f2fs_summary));
351df4b2
JK		 1949}
1950
0a8165d7 1951/*
351df4b2
JK		 1952 * Calculate the number of current summary pages for writing
1953 */
4d57b86d 1954int f2fs_npages_for_summary_flush(struct f2fs_sb_info *sbi, bool for_ra)
351df4b2 1955{
351df4b2 1956 int valid_sum_count = 0;
9a47938b 1957 int i, sum_in_page;
351df4b2
JK		 1958
1959 for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) {
1960 if (sbi->ckpt->alloc_type[i] == SSR)
1961 valid_sum_count += sbi->blocks_per_seg;
3fa06d7b
CY		 1962 else {
1963 if (for_ra)
1964 valid_sum_count += le16_to_cpu(
1965 F2FS_CKPT(sbi)->cur_data_blkoff[i]);
1966 else
1967 valid_sum_count += curseg_blkoff(sbi, i);
1968 }
351df4b2
JK		 1969 }
1970
09cbfeaf 1971 sum_in_page = (PAGE_SIZE - 2 * SUM_JOURNAL_SIZE -
9a47938b
FL		 1972 SUM_FOOTER_SIZE) / SUMMARY_SIZE;
1973 if (valid_sum_count <= sum_in_page)
351df4b2 1974 return 1;
9a47938b 1975 else if ((valid_sum_count - sum_in_page) <=
09cbfeaf 1976 (PAGE_SIZE - SUM_FOOTER_SIZE) / SUMMARY_SIZE)
351df4b2
JK		 1977 return 2;
1978 return 3;
1979}
1980
0a8165d7 1981/*
351df4b2
JK		 1982 * Caller should put this summary page
1983 */
4d57b86d 1984struct page *f2fs_get_sum_page(struct f2fs_sb_info *sbi, unsigned int segno)
351df4b2 1985{
4d57b86d 1986 return f2fs_get_meta_page(sbi, GET_SUM_BLOCK(sbi, segno));
351df4b2
JK		 1987}
1988
4d57b86d
CY		 1989void f2fs_update_meta_page(struct f2fs_sb_info *sbi,
1990 void *src, block_t blk_addr)
351df4b2 1991{
4d57b86d 1992 struct page *page = f2fs_grab_meta_page(sbi, blk_addr);
381722d2 1993
0537b811 1994 memcpy(page_address(page), src, PAGE_SIZE);
351df4b2
JK		 1995 set_page_dirty(page);
1996 f2fs_put_page(page, 1);
1997}
1998
381722d2
CY		 1999static void write_sum_page(struct f2fs_sb_info *sbi,
2000 struct f2fs_summary_block *sum_blk, block_t blk_addr)
2001{
4d57b86d 2002 f2fs_update_meta_page(sbi, (void *)sum_blk, blk_addr);
381722d2
CY		 2003}
2004
b7ad7512
CY		 2005static void write_current_sum_page(struct f2fs_sb_info *sbi,
2006 int type, block_t blk_addr)
2007{
2008 struct curseg_info *curseg = CURSEG_I(sbi, type);
4d57b86d 2009 struct page *page = f2fs_grab_meta_page(sbi, blk_addr);
b7ad7512
CY		 2010 struct f2fs_summary_block *src = curseg->sum_blk;
2011 struct f2fs_summary_block *dst;
2012
2013 dst = (struct f2fs_summary_block *)page_address(page);
81114baa 2014 memset(dst, 0, PAGE_SIZE);
b7ad7512
CY		 2015
2016 mutex_lock(&curseg->curseg_mutex);
2017
2018 down_read(&curseg->journal_rwsem);
2019 memcpy(&dst->journal, curseg->journal, SUM_JOURNAL_SIZE);
2020 up_read(&curseg->journal_rwsem);
2021
2022 memcpy(dst->entries, src->entries, SUM_ENTRY_SIZE);
2023 memcpy(&dst->footer, &src->footer, SUM_FOOTER_SIZE);
2024
2025 mutex_unlock(&curseg->curseg_mutex);
2026
2027 set_page_dirty(page);
2028 f2fs_put_page(page, 1);
2029}
2030
a7881893
JK		 2031static int is_next_segment_free(struct f2fs_sb_info *sbi, int type)
2032{
2033 struct curseg_info *curseg = CURSEG_I(sbi, type);
2034 unsigned int segno = curseg->segno + 1;
2035 struct free_segmap_info *free_i = FREE_I(sbi);
2036
2037 if (segno < MAIN_SEGS(sbi) && segno % sbi->segs_per_sec)
2038 return !test_bit(segno, free_i->free_segmap);
2039 return 0;
2040}
2041
0a8165d7 2042/*
351df4b2
JK		 2043 * Find a new segment from the free segments bitmap to right order
2044 * This function should be returned with success, otherwise BUG
2045 */
2046static void get_new_segment(struct f2fs_sb_info *sbi,
2047 unsigned int *newseg, bool new_sec, int dir)
2048{
2049 struct free_segmap_info *free_i = FREE_I(sbi);
351df4b2 2050 unsigned int segno, secno, zoneno;
7cd8558b 2051 unsigned int total_zones = MAIN_SECS(sbi) / sbi->secs_per_zone;
4ddb1a4d
JK		 2052 unsigned int hint = GET_SEC_FROM_SEG(sbi, *newseg);
2053 unsigned int old_zoneno = GET_ZONE_FROM_SEG(sbi, *newseg);
351df4b2
JK		 2054 unsigned int left_start = hint;
2055 bool init = true;
2056 int go_left = 0;
2057 int i;
2058
1a118ccf 2059 spin_lock(&free_i->segmap_lock);
351df4b2
JK		 2060
2061 if (!new_sec && ((*newseg + 1) % sbi->segs_per_sec)) {
2062 segno = find_next_zero_bit(free_i->free_segmap,
4ddb1a4d
JK		 2063 GET_SEG_FROM_SEC(sbi, hint + 1), *newseg + 1);
2064 if (segno < GET_SEG_FROM_SEC(sbi, hint + 1))
351df4b2
JK		 2065 goto got_it;
2066 }
2067find_other_zone:
7cd8558b
JK		 2068 secno = find_next_zero_bit(free_i->free_secmap, MAIN_SECS(sbi), hint);
2069 if (secno >= MAIN_SECS(sbi)) {
351df4b2
JK		 2070 if (dir == ALLOC_RIGHT) {
2071 secno = find_next_zero_bit(free_i->free_secmap,
7cd8558b
JK		 2072 MAIN_SECS(sbi), 0);
2073 f2fs_bug_on(sbi, secno >= MAIN_SECS(sbi));
351df4b2
JK		 2074 } else {
2075 go_left = 1;
2076 left_start = hint - 1;
2077 }
2078 }
2079 if (go_left == 0)
2080 goto skip_left;
2081
2082 while (test_bit(left_start, free_i->free_secmap)) {
2083 if (left_start > 0) {
2084 left_start--;
2085 continue;
2086 }
2087 left_start = find_next_zero_bit(free_i->free_secmap,
7cd8558b
JK		 2088 MAIN_SECS(sbi), 0);
2089 f2fs_bug_on(sbi, left_start >= MAIN_SECS(sbi));
351df4b2
JK		 2090 break;
2091 }
2092 secno = left_start;
2093skip_left:
4ddb1a4d
JK		 2094 segno = GET_SEG_FROM_SEC(sbi, secno);
2095 zoneno = GET_ZONE_FROM_SEC(sbi, secno);
351df4b2
JK		 2096
2097 /* give up on finding another zone */
2098 if (!init)
2099 goto got_it;
2100 if (sbi->secs_per_zone == 1)
2101 goto got_it;
2102 if (zoneno == old_zoneno)
2103 goto got_it;
2104 if (dir == ALLOC_LEFT) {
2105 if (!go_left && zoneno + 1 >= total_zones)
2106 goto got_it;
2107 if (go_left && zoneno == 0)
2108 goto got_it;
2109 }
2110 for (i = 0; i < NR_CURSEG_TYPE; i++)
2111 if (CURSEG_I(sbi, i)->zone == zoneno)
2112 break;
2113
2114 if (i < NR_CURSEG_TYPE) {
2115 /* zone is in user, try another */
2116 if (go_left)
2117 hint = zoneno * sbi->secs_per_zone - 1;
2118 else if (zoneno + 1 >= total_zones)
2119 hint = 0;
2120 else
2121 hint = (zoneno + 1) * sbi->secs_per_zone;
2122 init = false;
2123 goto find_other_zone;
2124 }
2125got_it:
2126 /* set it as dirty segment in free segmap */
9850cf4a 2127 f2fs_bug_on(sbi, test_bit(segno, free_i->free_segmap));
351df4b2
JK		 2128 __set_inuse(sbi, segno);
2129 *newseg = segno;
1a118ccf 2130 spin_unlock(&free_i->segmap_lock);
351df4b2
JK		 2131}
2132
2133static void reset_curseg(struct f2fs_sb_info *sbi, int type, int modified)
2134{
2135 struct curseg_info *curseg = CURSEG_I(sbi, type);
2136 struct summary_footer *sum_footer;
2137
2138 curseg->segno = curseg->next_segno;
4ddb1a4d 2139 curseg->zone = GET_ZONE_FROM_SEG(sbi, curseg->segno);
351df4b2
JK		 2140 curseg->next_blkoff = 0;
2141 curseg->next_segno = NULL_SEGNO;
2142
2143 sum_footer = &(curseg->sum_blk->footer);
2144 memset(sum_footer, 0, sizeof(struct summary_footer));
2145 if (IS_DATASEG(type))
2146 SET_SUM_TYPE(sum_footer, SUM_TYPE_DATA);
2147 if (IS_NODESEG(type))
2148 SET_SUM_TYPE(sum_footer, SUM_TYPE_NODE);
2149 __set_sit_entry_type(sbi, type, curseg->segno, modified);
2150}
2151
7a20b8a6
JK		 2152static unsigned int __get_next_segno(struct f2fs_sb_info *sbi, int type)
2153{
a7881893
JK		 2154 /* if segs_per_sec is large than 1, we need to keep original policy. */
2155 if (sbi->segs_per_sec != 1)
2156 return CURSEG_I(sbi, type)->segno;
2157
b94929d9
YS		 2158 if (test_opt(sbi, NOHEAP) &&
2159 (type == CURSEG_HOT_DATA || IS_NODESEG(type)))
7a20b8a6
JK		 2160 return 0;
2161
e066b83c
JK		 2162 if (SIT_I(sbi)->last_victim[ALLOC_NEXT])
2163 return SIT_I(sbi)->last_victim[ALLOC_NEXT];
07939627
JK		 2164
2165 /* find segments from 0 to reuse freed segments */
63189b78 2166 if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_REUSE)
07939627
JK		 2167 return 0;
2168
7a20b8a6
JK		 2169 return CURSEG_I(sbi, type)->segno;
2170}
2171
0a8165d7 2172/*
351df4b2
JK		 2173 * Allocate a current working segment.
2174 * This function always allocates a free segment in LFS manner.
2175 */
2176static void new_curseg(struct f2fs_sb_info *sbi, int type, bool new_sec)
2177{
2178 struct curseg_info *curseg = CURSEG_I(sbi, type);
2179 unsigned int segno = curseg->segno;
2180 int dir = ALLOC_LEFT;
2181
2182 write_sum_page(sbi, curseg->sum_blk,
81fb5e87 2183 GET_SUM_BLOCK(sbi, segno));
351df4b2
JK		 2184 if (type == CURSEG_WARM_DATA || type == CURSEG_COLD_DATA)
2185 dir = ALLOC_RIGHT;
2186
2187 if (test_opt(sbi, NOHEAP))
2188 dir = ALLOC_RIGHT;
2189
7a20b8a6 2190 segno = __get_next_segno(sbi, type);
351df4b2
JK		 2191 get_new_segment(sbi, &segno, new_sec, dir);
2192 curseg->next_segno = segno;
2193 reset_curseg(sbi, type, 1);
2194 curseg->alloc_type = LFS;
2195}
2196
2197static void __next_free_blkoff(struct f2fs_sb_info *sbi,
2198 struct curseg_info *seg, block_t start)
2199{
2200 struct seg_entry *se = get_seg_entry(sbi, seg->segno);
e81c93cf 2201 int entries = SIT_VBLOCK_MAP_SIZE / sizeof(unsigned long);
60a3b782 2202 unsigned long *target_map = SIT_I(sbi)->tmp_map;
e81c93cf
CL		 2203 unsigned long *ckpt_map = (unsigned long *)se->ckpt_valid_map;
2204 unsigned long *cur_map = (unsigned long *)se->cur_valid_map;
2205 int i, pos;
2206
2207 for (i = 0; i < entries; i++)
2208 target_map[i] = ckpt_map[i] | cur_map[i];
2209
2210 pos = __find_rev_next_zero_bit(target_map, sbi->blocks_per_seg, start);
2211
2212 seg->next_blkoff = pos;
351df4b2
JK		 2213}
2214
0a8165d7 2215/*
351df4b2
JK		 2216 * If a segment is written by LFS manner, next block offset is just obtained
2217 * by increasing the current block offset. However, if a segment is written by
2218 * SSR manner, next block offset obtained by calling __next_free_blkoff
2219 */
2220static void __refresh_next_blkoff(struct f2fs_sb_info *sbi,
2221 struct curseg_info *seg)
2222{
2223 if (seg->alloc_type == SSR)
2224 __next_free_blkoff(sbi, seg, seg->next_blkoff + 1);
2225 else
2226 seg->next_blkoff++;
2227}
2228
0a8165d7 2229/*
e1c42045 2230 * This function always allocates a used segment(from dirty seglist) by SSR
351df4b2
JK		 2231 * manner, so it should recover the existing segment information of valid blocks
2232 */
025d63a4 2233static void change_curseg(struct f2fs_sb_info *sbi, int type)
351df4b2
JK		 2234{
2235 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
2236 struct curseg_info *curseg = CURSEG_I(sbi, type);
2237 unsigned int new_segno = curseg->next_segno;
2238 struct f2fs_summary_block *sum_node;
2239 struct page *sum_page;
2240
2241 write_sum_page(sbi, curseg->sum_blk,
2242 GET_SUM_BLOCK(sbi, curseg->segno));
2243 __set_test_and_inuse(sbi, new_segno);
2244
2245 mutex_lock(&dirty_i->seglist_lock);
2246 __remove_dirty_segment(sbi, new_segno, PRE);
2247 __remove_dirty_segment(sbi, new_segno, DIRTY);
2248 mutex_unlock(&dirty_i->seglist_lock);
2249
2250 reset_curseg(sbi, type, 1);
2251 curseg->alloc_type = SSR;
2252 __next_free_blkoff(sbi, curseg, 0);
2253
4d57b86d 2254 sum_page = f2fs_get_sum_page(sbi, new_segno);
025d63a4
CY		 2255 sum_node = (struct f2fs_summary_block *)page_address(sum_page);
2256 memcpy(curseg->sum_blk, sum_node, SUM_ENTRY_SIZE);
2257 f2fs_put_page(sum_page, 1);
351df4b2
JK		 2258}
2259
43727527
JK		 2260static int get_ssr_segment(struct f2fs_sb_info *sbi, int type)
2261{
2262 struct curseg_info *curseg = CURSEG_I(sbi, type);
2263 const struct victim_selection *v_ops = DIRTY_I(sbi)->v_ops;
e066b83c 2264 unsigned segno = NULL_SEGNO;
d27c3d89
CY		 2265 int i, cnt;
2266 bool reversed = false;
c192f7a4 2267
4d57b86d 2268 /* f2fs_need_SSR() already forces to do this */
e066b83c
JK		 2269 if (v_ops->get_victim(sbi, &segno, BG_GC, type, SSR)) {
2270 curseg->next_segno = segno;
c192f7a4 2271 return 1;
e066b83c 2272 }
43727527 2273
70d625cb
JK		 2274 /* For node segments, let's do SSR more intensively */
2275 if (IS_NODESEG(type)) {
d27c3d89
CY		 2276 if (type >= CURSEG_WARM_NODE) {
2277 reversed = true;
2278 i = CURSEG_COLD_NODE;
2279 } else {
2280 i = CURSEG_HOT_NODE;
2281 }
2282 cnt = NR_CURSEG_NODE_TYPE;
70d625cb 2283 } else {
d27c3d89
CY		 2284 if (type >= CURSEG_WARM_DATA) {
2285 reversed = true;
2286 i = CURSEG_COLD_DATA;
2287 } else {
2288 i = CURSEG_HOT_DATA;
2289 }
2290 cnt = NR_CURSEG_DATA_TYPE;
70d625cb 2291 }
43727527 2292
d27c3d89 2293 for (; cnt-- > 0; reversed ? i-- : i++) {
c192f7a4
JK		 2294 if (i == type)
2295 continue;
e066b83c
JK		 2296 if (v_ops->get_victim(sbi, &segno, BG_GC, i, SSR)) {
2297 curseg->next_segno = segno;
43727527 2298 return 1;
e066b83c 2299 }
c192f7a4 2300 }
43727527
JK		 2301 return 0;
2302}
2303
351df4b2
JK		 2304/*
2305 * flush out current segment and replace it with new segment
2306 * This function should be returned with success, otherwise BUG
2307 */
2308static void allocate_segment_by_default(struct f2fs_sb_info *sbi,
2309 int type, bool force)
2310{
a7881893
JK		 2311 struct curseg_info *curseg = CURSEG_I(sbi, type);
2312
7b405275 2313 if (force)
351df4b2 2314 new_curseg(sbi, type, true);
5b6c6be2
JK		 2315 else if (!is_set_ckpt_flags(sbi, CP_CRC_RECOVERY_FLAG) &&
2316 type == CURSEG_WARM_NODE)
351df4b2 2317 new_curseg(sbi, type, false);
a7881893
JK		 2318 else if (curseg->alloc_type == LFS && is_next_segment_free(sbi, type))
2319 new_curseg(sbi, type, false);
4d57b86d 2320 else if (f2fs_need_SSR(sbi) && get_ssr_segment(sbi, type))
025d63a4 2321 change_curseg(sbi, type);
351df4b2
JK		 2322 else
2323 new_curseg(sbi, type, false);
dcdfff65 2324
a7881893 2325 stat_inc_seg_type(sbi, curseg);
351df4b2
JK		 2326}
2327
4d57b86d 2328void f2fs_allocate_new_segments(struct f2fs_sb_info *sbi)
351df4b2 2329{
6ae1be13
JK		 2330 struct curseg_info *curseg;
2331 unsigned int old_segno;
351df4b2
JK		 2332 int i;
2333
3d26fa6b
CY		 2334 down_write(&SIT_I(sbi)->sentry_lock);
2335
6ae1be13
JK		 2336 for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) {
2337 curseg = CURSEG_I(sbi, i);
2338 old_segno = curseg->segno;
2339 SIT_I(sbi)->s_ops->allocate_segment(sbi, i, true);
2340 locate_dirty_segment(sbi, old_segno);
2341 }
3d26fa6b
CY		 2342
2343 up_write(&SIT_I(sbi)->sentry_lock);
351df4b2
JK		 2344}
2345
2346static const struct segment_allocation default_salloc_ops = {
2347 .allocate_segment = allocate_segment_by_default,
2348};
2349
4d57b86d
CY		 2350bool f2fs_exist_trim_candidates(struct f2fs_sb_info *sbi,
2351 struct cp_control *cpc)
25290fa5
JK		 2352{
2353 __u64 trim_start = cpc->trim_start;
2354 bool has_candidate = false;
2355
3d26fa6b 2356 down_write(&SIT_I(sbi)->sentry_lock);
25290fa5
JK		 2357 for (; cpc->trim_start <= cpc->trim_end; cpc->trim_start++) {
2358 if (add_discard_addrs(sbi, cpc, true)) {
2359 has_candidate = true;
2360 break;
2361 }
2362 }
3d26fa6b 2363 up_write(&SIT_I(sbi)->sentry_lock);
25290fa5
JK		 2364
2365 cpc->trim_start = trim_start;
2366 return has_candidate;
2367}
2368
9a997188
JK		 2369static void __issue_discard_cmd_range(struct f2fs_sb_info *sbi,
2370 struct discard_policy *dpolicy,
2371 unsigned int start, unsigned int end)
2372{
2373 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
2374 struct discard_cmd *prev_dc = NULL, *next_dc = NULL;
2375 struct rb_node **insert_p = NULL, *insert_parent = NULL;
2376 struct discard_cmd *dc;
2377 struct blk_plug plug;
2378 int issued;
2379
2380next:
2381 issued = 0;
2382
2383 mutex_lock(&dcc->cmd_lock);
4d57b86d 2384 f2fs_bug_on(sbi, !f2fs_check_rb_tree_consistence(sbi, &dcc->root));
9a997188 2385
4d57b86d 2386 dc = (struct discard_cmd *)f2fs_lookup_rb_tree_ret(&dcc->root,
9a997188
JK		 2387 NULL, start,
2388 (struct rb_entry **)&prev_dc,
2389 (struct rb_entry **)&next_dc,
2390 &insert_p, &insert_parent, true);
2391 if (!dc)
2392 dc = next_dc;
2393
2394 blk_start_plug(&plug);
2395
2396 while (dc && dc->lstart <= end) {
2397 struct rb_node *node;
2398
2399 if (dc->len < dpolicy->granularity)
2400 goto skip;
2401
2402 if (dc->state != D_PREP) {
2403 list_move_tail(&dc->list, &dcc->fstrim_list);
2404 goto skip;
2405 }
2406
2407 __submit_discard_cmd(sbi, dpolicy, dc);
2408
2409 if (++issued >= dpolicy->max_requests) {
2410 start = dc->lstart + dc->len;
2411
2412 blk_finish_plug(&plug);
2413 mutex_unlock(&dcc->cmd_lock);
2414 __wait_all_discard_cmd(sbi, NULL);
2415 congestion_wait(BLK_RW_ASYNC, HZ/50);
2416 goto next;
2417 }
2418skip:
2419 node = rb_next(&dc->rb_node);
2420 dc = rb_entry_safe(node, struct discard_cmd, rb_node);
2421
2422 if (fatal_signal_pending(current))
2423 break;
2424 }
2425
2426 blk_finish_plug(&plug);
2427 mutex_unlock(&dcc->cmd_lock);
2428}
2429
4b2fecc8
JK		 2430int f2fs_trim_fs(struct f2fs_sb_info *sbi, struct fstrim_range *range)
2431{
f7ef9b83
JK		 2432 __u64 start = F2FS_BYTES_TO_BLK(range->start);
2433 __u64 end = start + F2FS_BYTES_TO_BLK(range->len) - 1;
377224c4 2434 unsigned int start_segno, end_segno;
8412663d 2435 block_t start_block, end_block;
4b2fecc8 2436 struct cp_control cpc;
78997b56 2437 struct discard_policy dpolicy;
0ea80512 2438 unsigned long long trimmed = 0;
c34f42e2 2439 int err = 0;
4b2fecc8 2440
836b5a63 2441 if (start >= MAX_BLKADDR(sbi) || range->len < sbi->blocksize)
4b2fecc8
JK		 2442 return -EINVAL;
2443
7cd8558b 2444 if (end <= MAIN_BLKADDR(sbi))
3d165dc3 2445 return -EINVAL;
4b2fecc8 2446
ed214a11
YH		 2447 if (is_sbi_flag_set(sbi, SBI_NEED_FSCK)) {
2448 f2fs_msg(sbi->sb, KERN_WARNING,
2449 "Found FS corruption, run fsck to fix.");
3d165dc3 2450 return -EIO;
ed214a11
YH		 2451 }
2452
4b2fecc8 2453 /* start/end segment number in main_area */
7cd8558b
JK		 2454 start_segno = (start <= MAIN_BLKADDR(sbi)) ? 0 : GET_SEGNO(sbi, start);
2455 end_segno = (end >= MAX_BLKADDR(sbi)) ? MAIN_SEGS(sbi) - 1 :
2456 GET_SEGNO(sbi, end);
8412663d 2457
4b2fecc8 2458 cpc.reason = CP_DISCARD;
836b5a63 2459 cpc.trim_minlen = max_t(__u64, 1, F2FS_BYTES_TO_BLK(range->minlen));
377224c4
CY		 2460 cpc.trim_start = start_segno;
2461 cpc.trim_end = end_segno;
4b2fecc8 2462
377224c4
CY		 2463 if (sbi->discard_blks == 0)
2464 goto out;
74fa5f3d 2465
377224c4 2466 mutex_lock(&sbi->gc_mutex);
4d57b86d 2467 err = f2fs_write_checkpoint(sbi, &cpc);
377224c4
CY		 2468 mutex_unlock(&sbi->gc_mutex);
2469 if (err)
2470 goto out;
8412663d
CY		 2471
2472 start_block = START_BLOCK(sbi, start_segno);
377224c4 2473 end_block = START_BLOCK(sbi, end_segno + 1);
8412663d 2474
8bb4f253 2475 __init_discard_policy(sbi, &dpolicy, DPOLICY_FSTRIM, cpc.trim_minlen);
78997b56 2476 __issue_discard_cmd_range(sbi, &dpolicy, start_block, end_block);
e555da9f
JK		 2477
2478 /*
2479 * We filed discard candidates, but actually we don't need to wait for
2480 * all of them, since they'll be issued in idle time along with runtime
2481 * discard option. User configuration looks like using runtime discard
2482 * or periodic fstrim instead of it.
2483 */
2484 if (!test_opt(sbi, DISCARD)) {
2485 trimmed = __wait_discard_cmd_range(sbi, &dpolicy,
0ea80512 2486 start_block, end_block);
e555da9f
JK		 2487 range->len = F2FS_BLK_TO_BYTES(trimmed);
2488 }
377224c4 2489out:
c34f42e2 2490 return err;
4b2fecc8
JK		 2491}
2492
351df4b2
JK		 2493static bool __has_curseg_space(struct f2fs_sb_info *sbi, int type)
2494{
2495 struct curseg_info *curseg = CURSEG_I(sbi, type);
2496 if (curseg->next_blkoff < sbi->blocks_per_seg)
2497 return true;
2498 return false;
2499}
2500
4d57b86d 2501int f2fs_rw_hint_to_seg_type(enum rw_hint hint)
4f0a03d3
HL		 2502{
2503 switch (hint) {
2504 case WRITE_LIFE_SHORT:
2505 return CURSEG_HOT_DATA;
2506 case WRITE_LIFE_EXTREME:
2507 return CURSEG_COLD_DATA;
2508 default:
2509 return CURSEG_WARM_DATA;
2510 }
2511}
2512
0cdd3195
HL		 2513/* This returns write hints for each segment type. This hints will be
2514 * passed down to block layer. There are mapping tables which depend on
2515 * the mount option 'whint_mode'.
2516 *
2517 * 1) whint_mode=off. F2FS only passes down WRITE_LIFE_NOT_SET.
2518 *
2519 * 2) whint_mode=user-based. F2FS tries to pass down hints given by users.
2520 *
2521 * User F2FS Block
2522 * ---- ---- -----
2523 * META WRITE_LIFE_NOT_SET
2524 * HOT_NODE "
2525 * WARM_NODE "
2526 * COLD_NODE "
2527 * ioctl(COLD) COLD_DATA WRITE_LIFE_EXTREME
2528 * extension list " "
2529 *
2530 * -- buffered io
2531 * WRITE_LIFE_EXTREME COLD_DATA WRITE_LIFE_EXTREME
2532 * WRITE_LIFE_SHORT HOT_DATA WRITE_LIFE_SHORT
2533 * WRITE_LIFE_NOT_SET WARM_DATA WRITE_LIFE_NOT_SET
2534 * WRITE_LIFE_NONE " "
2535 * WRITE_LIFE_MEDIUM " "
2536 * WRITE_LIFE_LONG " "
2537 *
2538 * -- direct io
2539 * WRITE_LIFE_EXTREME COLD_DATA WRITE_LIFE_EXTREME
2540 * WRITE_LIFE_SHORT HOT_DATA WRITE_LIFE_SHORT
2541 * WRITE_LIFE_NOT_SET WARM_DATA WRITE_LIFE_NOT_SET
2542 * WRITE_LIFE_NONE " WRITE_LIFE_NONE
2543 * WRITE_LIFE_MEDIUM " WRITE_LIFE_MEDIUM
2544 * WRITE_LIFE_LONG " WRITE_LIFE_LONG
2545 *
f2e703f9
HL		 2546 * 3) whint_mode=fs-based. F2FS passes down hints with its policy.
2547 *
2548 * User F2FS Block
2549 * ---- ---- -----
2550 * META WRITE_LIFE_MEDIUM;
2551 * HOT_NODE WRITE_LIFE_NOT_SET
2552 * WARM_NODE "
2553 * COLD_NODE WRITE_LIFE_NONE
2554 * ioctl(COLD) COLD_DATA WRITE_LIFE_EXTREME
2555 * extension list " "
2556 *
2557 * -- buffered io
2558 * WRITE_LIFE_EXTREME COLD_DATA WRITE_LIFE_EXTREME
2559 * WRITE_LIFE_SHORT HOT_DATA WRITE_LIFE_SHORT
2560 * WRITE_LIFE_NOT_SET WARM_DATA WRITE_LIFE_LONG
2561 * WRITE_LIFE_NONE " "
2562 * WRITE_LIFE_MEDIUM " "
2563 * WRITE_LIFE_LONG " "
2564 *
2565 * -- direct io
2566 * WRITE_LIFE_EXTREME COLD_DATA WRITE_LIFE_EXTREME
2567 * WRITE_LIFE_SHORT HOT_DATA WRITE_LIFE_SHORT
2568 * WRITE_LIFE_NOT_SET WARM_DATA WRITE_LIFE_NOT_SET
2569 * WRITE_LIFE_NONE " WRITE_LIFE_NONE
2570 * WRITE_LIFE_MEDIUM " WRITE_LIFE_MEDIUM
2571 * WRITE_LIFE_LONG " WRITE_LIFE_LONG
0cdd3195
HL		 2572 */
2573
4d57b86d 2574enum rw_hint f2fs_io_type_to_rw_hint(struct f2fs_sb_info *sbi,
0cdd3195
HL		 2575 enum page_type type, enum temp_type temp)
2576{
63189b78 2577 if (F2FS_OPTION(sbi).whint_mode == WHINT_MODE_USER) {
0cdd3195 2578 if (type == DATA) {
f2e703f9 2579 if (temp == WARM)
0cdd3195 2580 return WRITE_LIFE_NOT_SET;
f2e703f9
HL		 2581 else if (temp == HOT)
2582 return WRITE_LIFE_SHORT;
2583 else if (temp == COLD)
2584 return WRITE_LIFE_EXTREME;
0cdd3195
HL		 2585 } else {
2586 return WRITE_LIFE_NOT_SET;
2587 }
63189b78 2588 } else if (F2FS_OPTION(sbi).whint_mode == WHINT_MODE_FS) {
f2e703f9
HL		 2589 if (type == DATA) {
2590 if (temp == WARM)
2591 return WRITE_LIFE_LONG;
2592 else if (temp == HOT)
2593 return WRITE_LIFE_SHORT;
2594 else if (temp == COLD)
2595 return WRITE_LIFE_EXTREME;
2596 } else if (type == NODE) {
2597 if (temp == WARM || temp == HOT)
2598 return WRITE_LIFE_NOT_SET;
2599 else if (temp == COLD)
2600 return WRITE_LIFE_NONE;
2601 } else if (type == META) {
2602 return WRITE_LIFE_MEDIUM;
2603 }
0cdd3195 2604 }
f2e703f9 2605 return WRITE_LIFE_NOT_SET;
0cdd3195
HL		 2606}
2607
81377bd6 2608static int __get_segment_type_2(struct f2fs_io_info *fio)
351df4b2 2609{
81377bd6 2610 if (fio->type == DATA)
351df4b2
JK		 2611 return CURSEG_HOT_DATA;
2612 else
2613 return CURSEG_HOT_NODE;
2614}
2615
81377bd6 2616static int __get_segment_type_4(struct f2fs_io_info *fio)
351df4b2 2617{
81377bd6
JK		 2618 if (fio->type == DATA) {
2619 struct inode *inode = fio->page->mapping->host;
351df4b2
JK		 2620
2621 if (S_ISDIR(inode->i_mode))
2622 return CURSEG_HOT_DATA;
2623 else
2624 return CURSEG_COLD_DATA;
2625 } else {
81377bd6 2626 if (IS_DNODE(fio->page) && is_cold_node(fio->page))
a344b9fd 2627 return CURSEG_WARM_NODE;
351df4b2
JK		 2628 else
2629 return CURSEG_COLD_NODE;
2630 }
2631}
2632
81377bd6 2633static int __get_segment_type_6(struct f2fs_io_info *fio)
351df4b2 2634{
81377bd6
JK		 2635 if (fio->type == DATA) {
2636 struct inode *inode = fio->page->mapping->host;
351df4b2 2637
81377bd6 2638 if (is_cold_data(fio->page) || file_is_cold(inode))
351df4b2 2639 return CURSEG_COLD_DATA;
b6a06cbb 2640 if (file_is_hot(inode) ||
b4c3ca8b
CY		 2641 is_inode_flag_set(inode, FI_HOT_DATA) ||
2642 is_inode_flag_set(inode, FI_ATOMIC_FILE) ||
2643 is_inode_flag_set(inode, FI_VOLATILE_FILE))
ef095d19 2644 return CURSEG_HOT_DATA;
4d57b86d 2645 return f2fs_rw_hint_to_seg_type(inode->i_write_hint);
351df4b2 2646 } else {
81377bd6
JK		 2647 if (IS_DNODE(fio->page))
2648 return is_cold_node(fio->page) ? CURSEG_WARM_NODE :
351df4b2 2649 CURSEG_HOT_NODE;
ef095d19 2650 return CURSEG_COLD_NODE;
351df4b2
JK		 2651 }
2652}
2653
81377bd6 2654static int __get_segment_type(struct f2fs_io_info *fio)
351df4b2 2655{
a912b54d
JK		 2656 int type = 0;
2657
63189b78 2658 switch (F2FS_OPTION(fio->sbi).active_logs) {
351df4b2 2659 case 2:
a912b54d
JK		 2660 type = __get_segment_type_2(fio);
2661 break;
351df4b2 2662 case 4:
a912b54d
JK		 2663 type = __get_segment_type_4(fio);
2664 break;
2665 case 6:
2666 type = __get_segment_type_6(fio);
2667 break;
2668 default:
2669 f2fs_bug_on(fio->sbi, true);
351df4b2 2670 }
81377bd6 2671
a912b54d
JK		 2672 if (IS_HOT(type))
2673 fio->temp = HOT;
2674 else if (IS_WARM(type))
2675 fio->temp = WARM;
2676 else
2677 fio->temp = COLD;
2678 return type;
351df4b2
JK		 2679}
2680
4d57b86d 2681void f2fs_allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
bfad7c2d 2682 block_t old_blkaddr, block_t *new_blkaddr,
fb830fc5
CY		 2683 struct f2fs_summary *sum, int type,
2684 struct f2fs_io_info *fio, bool add_list)
351df4b2
JK		 2685{
2686 struct sit_info *sit_i = SIT_I(sbi);
6ae1be13 2687 struct curseg_info *curseg = CURSEG_I(sbi, type);
351df4b2 2688
2b60311d
CY		 2689 down_read(&SM_I(sbi)->curseg_lock);
2690
351df4b2 2691 mutex_lock(&curseg->curseg_mutex);
3d26fa6b 2692 down_write(&sit_i->sentry_lock);
351df4b2
JK		 2693
2694 *new_blkaddr = NEXT_FREE_BLKADDR(sbi, curseg);
351df4b2 2695
4e6a8d9b
JK		 2696 f2fs_wait_discard_bio(sbi, *new_blkaddr);
2697
351df4b2
JK		 2698 /*
2699 * __add_sum_entry should be resided under the curseg_mutex
2700 * because, this function updates a summary entry in the
2701 * current summary block.
2702 */
e79efe3b 2703 __add_sum_entry(sbi, type, sum);
351df4b2 2704
351df4b2 2705 __refresh_next_blkoff(sbi, curseg);
dcdfff65
JK		 2706
2707 stat_inc_block_count(sbi, curseg);
351df4b2 2708
65f1b80b
YS		 2709 /*
2710 * SIT information should be updated before segment allocation,
2711 * since SSR needs latest valid block information.
2712 */
2713 update_sit_entry(sbi, *new_blkaddr, 1);
2714 if (GET_SEGNO(sbi, old_blkaddr) != NULL_SEGNO)
2715 update_sit_entry(sbi, old_blkaddr, -1);
2716
c6f82fe9
JK		 2717 if (!__has_curseg_space(sbi, type))
2718 sit_i->s_ops->allocate_segment(sbi, type, false);
65f1b80b 2719
351df4b2 2720 /*
65f1b80b
YS		 2721 * segment dirty status should be updated after segment allocation,
2722 * so we just need to update status only one time after previous
2723 * segment being closed.
351df4b2 2724 */
65f1b80b
YS		 2725 locate_dirty_segment(sbi, GET_SEGNO(sbi, old_blkaddr));
2726 locate_dirty_segment(sbi, GET_SEGNO(sbi, *new_blkaddr));
5e443818 2727
3d26fa6b 2728 up_write(&sit_i->sentry_lock);
351df4b2 2729
704956ec 2730 if (page && IS_NODESEG(type)) {
351df4b2
JK		 2731 fill_node_footer_blkaddr(page, NEXT_FREE_BLKADDR(sbi, curseg));
2732
704956ec
CY		 2733 f2fs_inode_chksum_set(sbi, page);
2734 }
2735
fb830fc5
CY		 2736 if (add_list) {
2737 struct f2fs_bio_info *io;
2738
2739 INIT_LIST_HEAD(&fio->list);
2740 fio->in_list = true;
fe16efe6 2741 fio->retry = false;
fb830fc5
CY		 2742 io = sbi->write_io[fio->type] + fio->temp;
2743 spin_lock(&io->io_lock);
2744 list_add_tail(&fio->list, &io->io_list);
2745 spin_unlock(&io->io_lock);
2746 }
2747
bfad7c2d 2748 mutex_unlock(&curseg->curseg_mutex);
2b60311d
CY		 2749
2750 up_read(&SM_I(sbi)->curseg_lock);
bfad7c2d
JK		 2751}
2752
39d787be
CY		 2753static void update_device_state(struct f2fs_io_info *fio)
2754{
2755 struct f2fs_sb_info *sbi = fio->sbi;
2756 unsigned int devidx;
2757
2758 if (!sbi->s_ndevs)
2759 return;
2760
2761 devidx = f2fs_target_device_index(sbi, fio->new_blkaddr);
2762
2763 /* update device state for fsync */
4d57b86d 2764 f2fs_set_dirty_device(sbi, fio->ino, devidx, FLUSH_INO);
1228b482
CY		 2765
2766 /* update device state for checkpoint */
2767 if (!f2fs_test_bit(devidx, (char *)&sbi->dirty_device)) {
2768 spin_lock(&sbi->dev_lock);
2769 f2fs_set_bit(devidx, (char *)&sbi->dirty_device);
2770 spin_unlock(&sbi->dev_lock);
2771 }
39d787be
CY		 2772}
2773
05ca3632 2774static void do_write_page(struct f2fs_summary *sum, struct f2fs_io_info *fio)
bfad7c2d 2775{
81377bd6 2776 int type = __get_segment_type(fio);
107a805d 2777 bool keep_order = (test_opt(fio->sbi, LFS) && type == CURSEG_COLD_DATA);
bfad7c2d 2778
107a805d
CY		 2779 if (keep_order)
2780 down_read(&fio->sbi->io_order_lock);
0a595eba 2781reallocate:
4d57b86d 2782 f2fs_allocate_data_block(fio->sbi, fio->page, fio->old_blkaddr,
fb830fc5 2783 &fio->new_blkaddr, sum, type, fio, true);
bfad7c2d 2784
351df4b2 2785 /* writeout dirty page into bdev */
fe16efe6
CY		 2786 f2fs_submit_page_write(fio);
2787 if (fio->retry) {
0a595eba
JK		 2788 fio->old_blkaddr = fio->new_blkaddr;
2789 goto reallocate;
2790 }
fe16efe6
CY		 2791
2792 update_device_state(fio);
2793
107a805d
CY		 2794 if (keep_order)
2795 up_read(&fio->sbi->io_order_lock);
351df4b2
JK		 2796}
2797
4d57b86d 2798void f2fs_do_write_meta_page(struct f2fs_sb_info *sbi, struct page *page,
b0af6d49 2799 enum iostat_type io_type)
351df4b2 2800{
458e6197 2801 struct f2fs_io_info fio = {
05ca3632 2802 .sbi = sbi,
458e6197 2803 .type = META,
0cdd3195 2804 .temp = HOT,
04d328de 2805 .op = REQ_OP_WRITE,
70fd7614 2806 .op_flags = REQ_SYNC | REQ_META | REQ_PRIO,
7a9d7548
CY		 2807 .old_blkaddr = page->index,
2808 .new_blkaddr = page->index,
05ca3632 2809 .page = page,
4375a336 2810 .encrypted_page = NULL,
fb830fc5 2811 .in_list = false,
458e6197
JK		 2812 };
2813
2b947003 2814 if (unlikely(page->index >= MAIN_BLKADDR(sbi)))
04d328de 2815 fio.op_flags &= ~REQ_META;
2b947003 2816
351df4b2 2817 set_page_writeback(page);
17c50035 2818 ClearPageError(page);
b9109b0e 2819 f2fs_submit_page_write(&fio);
b0af6d49
CY		 2820
2821 f2fs_update_iostat(sbi, io_type, F2FS_BLKSIZE);
351df4b2
JK		 2822}
2823
4d57b86d 2824void f2fs_do_write_node_page(unsigned int nid, struct f2fs_io_info *fio)
351df4b2
JK		 2825{
2826 struct f2fs_summary sum;
05ca3632 2827
351df4b2 2828 set_summary(&sum, nid, 0, 0);
05ca3632 2829 do_write_page(&sum, fio);
b0af6d49
CY		 2830
2831 f2fs_update_iostat(fio->sbi, fio->io_type, F2FS_BLKSIZE);
351df4b2
JK		 2832}
2833
4d57b86d
CY		 2834void f2fs_outplace_write_data(struct dnode_of_data *dn,
2835 struct f2fs_io_info *fio)
351df4b2 2836{
05ca3632 2837 struct f2fs_sb_info *sbi = fio->sbi;
351df4b2
JK		 2838 struct f2fs_summary sum;
2839 struct node_info ni;
2840
9850cf4a 2841 f2fs_bug_on(sbi, dn->data_blkaddr == NULL_ADDR);
4d57b86d 2842 f2fs_get_node_info(sbi, dn->nid, &ni);
351df4b2 2843 set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version);
05ca3632 2844 do_write_page(&sum, fio);
f28b3434 2845 f2fs_update_data_blkaddr(dn, fio->new_blkaddr);
b0af6d49
CY		 2846
2847 f2fs_update_iostat(sbi, fio->io_type, F2FS_BLKSIZE);
351df4b2
JK		 2848}
2849
4d57b86d 2850int f2fs_inplace_write_data(struct f2fs_io_info *fio)
351df4b2 2851{
b0af6d49 2852 int err;
d21b0f23 2853 struct f2fs_sb_info *sbi = fio->sbi;
b0af6d49 2854
7a9d7548 2855 fio->new_blkaddr = fio->old_blkaddr;
0cdd3195
HL		 2856 /* i/o temperature is needed for passing down write hints */
2857 __get_segment_type(fio);
d21b0f23
YH		 2858
2859 f2fs_bug_on(sbi, !IS_DATASEG(get_seg_entry(sbi,
2860 GET_SEGNO(sbi, fio->new_blkaddr))->type));
2861
05ca3632 2862 stat_inc_inplace_blocks(fio->sbi);
b0af6d49
CY		 2863
2864 err = f2fs_submit_page_bio(fio);
39d787be
CY		 2865 if (!err)
2866 update_device_state(fio);
b0af6d49
CY		 2867
2868 f2fs_update_iostat(fio->sbi, fio->io_type, F2FS_BLKSIZE);
2869
2870 return err;
351df4b2
JK		 2871}
2872
2b60311d
CY		 2873static inline int __f2fs_get_curseg(struct f2fs_sb_info *sbi,
2874 unsigned int segno)
2875{
2876 int i;
2877
2878 for (i = CURSEG_HOT_DATA; i < NO_CHECK_TYPE; i++) {
2879 if (CURSEG_I(sbi, i)->segno == segno)
2880 break;
2881 }
2882 return i;
2883}
2884
4d57b86d 2885void f2fs_do_replace_block(struct f2fs_sb_info *sbi, struct f2fs_summary *sum,
19f106bc 2886 block_t old_blkaddr, block_t new_blkaddr,
28bc106b 2887 bool recover_curseg, bool recover_newaddr)
351df4b2
JK		 2888{
2889 struct sit_info *sit_i = SIT_I(sbi);
2890 struct curseg_info *curseg;
2891 unsigned int segno, old_cursegno;
2892 struct seg_entry *se;
2893 int type;
19f106bc 2894 unsigned short old_blkoff;
351df4b2
JK		 2895
2896 segno = GET_SEGNO(sbi, new_blkaddr);
2897 se = get_seg_entry(sbi, segno);
2898 type = se->type;
2899
2b60311d
CY		 2900 down_write(&SM_I(sbi)->curseg_lock);
2901
19f106bc
CY		 2902 if (!recover_curseg) {
2903 /* for recovery flow */
2904 if (se->valid_blocks == 0 && !IS_CURSEG(sbi, segno)) {
2905 if (old_blkaddr == NULL_ADDR)
2906 type = CURSEG_COLD_DATA;
2907 else
2908 type = CURSEG_WARM_DATA;
2909 }
2910 } else {
2b60311d
CY		 2911 if (IS_CURSEG(sbi, segno)) {
2912 /* se->type is volatile as SSR allocation */
2913 type = __f2fs_get_curseg(sbi, segno);
2914 f2fs_bug_on(sbi, type == NO_CHECK_TYPE);
2915 } else {
351df4b2 2916 type = CURSEG_WARM_DATA;
2b60311d 2917 }
351df4b2 2918 }
19f106bc 2919
2c190504 2920 f2fs_bug_on(sbi, !IS_DATASEG(type));
351df4b2
JK		 2921 curseg = CURSEG_I(sbi, type);
2922
2923 mutex_lock(&curseg->curseg_mutex);
3d26fa6b 2924 down_write(&sit_i->sentry_lock);
351df4b2
JK		 2925
2926 old_cursegno = curseg->segno;
19f106bc 2927 old_blkoff = curseg->next_blkoff;
351df4b2
JK		 2928
2929 /* change the current segment */
2930 if (segno != curseg->segno) {
2931 curseg->next_segno = segno;
025d63a4 2932 change_curseg(sbi, type);
351df4b2
JK		 2933 }
2934
491c0854 2935 curseg->next_blkoff = GET_BLKOFF_FROM_SEG0(sbi, new_blkaddr);
e79efe3b 2936 __add_sum_entry(sbi, type, sum);
351df4b2 2937
28bc106b 2938 if (!recover_curseg || recover_newaddr)
6e2c64ad
JK		 2939 update_sit_entry(sbi, new_blkaddr, 1);
2940 if (GET_SEGNO(sbi, old_blkaddr) != NULL_SEGNO)
2941 update_sit_entry(sbi, old_blkaddr, -1);
2942
2943 locate_dirty_segment(sbi, GET_SEGNO(sbi, old_blkaddr));
2944 locate_dirty_segment(sbi, GET_SEGNO(sbi, new_blkaddr));
2945
351df4b2 2946 locate_dirty_segment(sbi, old_cursegno);
351df4b2 2947
19f106bc
CY		 2948 if (recover_curseg) {
2949 if (old_cursegno != curseg->segno) {
2950 curseg->next_segno = old_cursegno;
025d63a4 2951 change_curseg(sbi, type);
19f106bc
CY		 2952 }
2953 curseg->next_blkoff = old_blkoff;
2954 }
2955
3d26fa6b 2956 up_write(&sit_i->sentry_lock);
351df4b2 2957 mutex_unlock(&curseg->curseg_mutex);
2b60311d 2958 up_write(&SM_I(sbi)->curseg_lock);
351df4b2
JK		 2959}
2960
528e3459
CY		 2961void f2fs_replace_block(struct f2fs_sb_info *sbi, struct dnode_of_data *dn,
2962 block_t old_addr, block_t new_addr,
28bc106b
CY		 2963 unsigned char version, bool recover_curseg,
2964 bool recover_newaddr)
528e3459
CY		 2965{
2966 struct f2fs_summary sum;
2967
2968 set_summary(&sum, dn->nid, dn->ofs_in_node, version);
2969
4d57b86d 2970 f2fs_do_replace_block(sbi, &sum, old_addr, new_addr,
28bc106b 2971 recover_curseg, recover_newaddr);
528e3459 2972
f28b3434 2973 f2fs_update_data_blkaddr(dn, new_addr);
528e3459
CY		 2974}
2975
93dfe2ac 2976void f2fs_wait_on_page_writeback(struct page *page,
fec1d657 2977 enum page_type type, bool ordered)
93dfe2ac 2978{
93dfe2ac 2979 if (PageWriteback(page)) {
4081363f
JK		 2980 struct f2fs_sb_info *sbi = F2FS_P_SB(page);
2981
b9109b0e
JK		 2982 f2fs_submit_merged_write_cond(sbi, page->mapping->host,
2983 0, page->index, type);
fec1d657
JK		 2984 if (ordered)
2985 wait_on_page_writeback(page);
2986 else
2987 wait_for_stable_page(page);
93dfe2ac
JK		 2988 }
2989}
2990
d4c759ee 2991void f2fs_wait_on_block_writeback(struct f2fs_sb_info *sbi, block_t blkaddr)
08b39fbd
CY		 2992{
2993 struct page *cpage;
2994
7b525dd0 2995 if (!is_valid_blkaddr(blkaddr))
08b39fbd
CY		 2996 return;
2997
08b39fbd
CY		 2998 cpage = find_lock_page(META_MAPPING(sbi), blkaddr);
2999 if (cpage) {
fec1d657 3000 f2fs_wait_on_page_writeback(cpage, DATA, true);
08b39fbd
CY		 3001 f2fs_put_page(cpage, 1);
3002 }
3003}
3004
c376fc0f 3005static void read_compacted_summaries(struct f2fs_sb_info *sbi)
351df4b2
JK		 3006{
3007 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
3008 struct curseg_info *seg_i;
3009 unsigned char *kaddr;
3010 struct page *page;
3011 block_t start;
3012 int i, j, offset;
3013
3014 start = start_sum_block(sbi);
3015
4d57b86d 3016 page = f2fs_get_meta_page(sbi, start++);
351df4b2
JK		 3017 kaddr = (unsigned char *)page_address(page);
3018
3019 /* Step 1: restore nat cache */
3020 seg_i = CURSEG_I(sbi, CURSEG_HOT_DATA);
b7ad7512 3021 memcpy(seg_i->journal, kaddr, SUM_JOURNAL_SIZE);
351df4b2
JK		 3022
3023 /* Step 2: restore sit cache */
3024 seg_i = CURSEG_I(sbi, CURSEG_COLD_DATA);
b7ad7512 3025 memcpy(seg_i->journal, kaddr + SUM_JOURNAL_SIZE, SUM_JOURNAL_SIZE);
351df4b2
JK		 3026 offset = 2 * SUM_JOURNAL_SIZE;
3027
3028 /* Step 3: restore summary entries */
3029 for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) {
3030 unsigned short blk_off;
3031 unsigned int segno;
3032
3033 seg_i = CURSEG_I(sbi, i);
3034 segno = le32_to_cpu(ckpt->cur_data_segno[i]);
3035 blk_off = le16_to_cpu(ckpt->cur_data_blkoff[i]);
3036 seg_i->next_segno = segno;
3037 reset_curseg(sbi, i, 0);
3038 seg_i->alloc_type = ckpt->alloc_type[i];
3039 seg_i->next_blkoff = blk_off;
3040
3041 if (seg_i->alloc_type == SSR)
3042 blk_off = sbi->blocks_per_seg;
3043
3044 for (j = 0; j < blk_off; j++) {
3045 struct f2fs_summary *s;
3046 s = (struct f2fs_summary *)(kaddr + offset);
3047 seg_i->sum_blk->entries[j] = *s;
3048 offset += SUMMARY_SIZE;
09cbfeaf 3049 if (offset + SUMMARY_SIZE <= PAGE_SIZE -
351df4b2
JK		 3050 SUM_FOOTER_SIZE)
3051 continue;
3052
3053 f2fs_put_page(page, 1);
3054 page = NULL;
3055
4d57b86d 3056 page = f2fs_get_meta_page(sbi, start++);
351df4b2
JK		 3057 kaddr = (unsigned char *)page_address(page);
3058 offset = 0;
3059 }
3060 }
3061 f2fs_put_page(page, 1);
351df4b2
JK		 3062}
3063
3064static int read_normal_summaries(struct f2fs_sb_info *sbi, int type)
3065{
3066 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
3067 struct f2fs_summary_block *sum;
3068 struct curseg_info *curseg;
3069 struct page *new;
3070 unsigned short blk_off;
3071 unsigned int segno = 0;
3072 block_t blk_addr = 0;
3073
3074 /* get segment number and block addr */
3075 if (IS_DATASEG(type)) {
3076 segno = le32_to_cpu(ckpt->cur_data_segno[type]);
3077 blk_off = le16_to_cpu(ckpt->cur_data_blkoff[type -
3078 CURSEG_HOT_DATA]);
119ee914 3079 if (__exist_node_summaries(sbi))
351df4b2
JK		 3080 blk_addr = sum_blk_addr(sbi, NR_CURSEG_TYPE, type);
3081 else
3082 blk_addr = sum_blk_addr(sbi, NR_CURSEG_DATA_TYPE, type);
3083 } else {
3084 segno = le32_to_cpu(ckpt->cur_node_segno[type -
3085 CURSEG_HOT_NODE]);
3086 blk_off = le16_to_cpu(ckpt->cur_node_blkoff[type -
3087 CURSEG_HOT_NODE]);
119ee914 3088 if (__exist_node_summaries(sbi))
351df4b2
JK		 3089 blk_addr = sum_blk_addr(sbi, NR_CURSEG_NODE_TYPE,
3090 type - CURSEG_HOT_NODE);
3091 else
3092 blk_addr = GET_SUM_BLOCK(sbi, segno);
3093 }
3094
4d57b86d 3095 new = f2fs_get_meta_page(sbi, blk_addr);
351df4b2
JK		 3096 sum = (struct f2fs_summary_block *)page_address(new);
3097
3098 if (IS_NODESEG(type)) {
119ee914 3099 if (__exist_node_summaries(sbi)) {
351df4b2
JK		 3100 struct f2fs_summary *ns = &sum->entries[0];
3101 int i;
3102 for (i = 0; i < sbi->blocks_per_seg; i++, ns++) {
3103 ns->version = 0;
3104 ns->ofs_in_node = 0;
3105 }
3106 } else {
4d57b86d 3107 f2fs_restore_node_summary(sbi, segno, sum);
351df4b2
JK		 3108 }
3109 }
3110
3111 /* set uncompleted segment to curseg */
3112 curseg = CURSEG_I(sbi, type);
3113 mutex_lock(&curseg->curseg_mutex);
b7ad7512
CY		 3114
3115 /* update journal info */
3116 down_write(&curseg->journal_rwsem);
3117 memcpy(curseg->journal, &sum->journal, SUM_JOURNAL_SIZE);
3118 up_write(&curseg->journal_rwsem);
3119
3120 memcpy(curseg->sum_blk->entries, sum->entries, SUM_ENTRY_SIZE);
3121 memcpy(&curseg->sum_blk->footer, &sum->footer, SUM_FOOTER_SIZE);
351df4b2
JK		 3122 curseg->next_segno = segno;
3123 reset_curseg(sbi, type, 0);
3124 curseg->alloc_type = ckpt->alloc_type[type];
3125 curseg->next_blkoff = blk_off;
3126 mutex_unlock(&curseg->curseg_mutex);
3127 f2fs_put_page(new, 1);
3128 return 0;
3129}
3130
3131static int restore_curseg_summaries(struct f2fs_sb_info *sbi)
3132{
21d3f8e1
JQ		 3133 struct f2fs_journal *sit_j = CURSEG_I(sbi, CURSEG_COLD_DATA)->journal;
3134 struct f2fs_journal *nat_j = CURSEG_I(sbi, CURSEG_HOT_DATA)->journal;
351df4b2 3135 int type = CURSEG_HOT_DATA;
e4fc5fbf 3136 int err;
351df4b2 3137
aaec2b1d 3138 if (is_set_ckpt_flags(sbi, CP_COMPACT_SUM_FLAG)) {
4d57b86d 3139 int npages = f2fs_npages_for_summary_flush(sbi, true);
3fa06d7b
CY		 3140
3141 if (npages >= 2)
4d57b86d 3142 f2fs_ra_meta_pages(sbi, start_sum_block(sbi), npages,
26879fb1 3143 META_CP, true);
3fa06d7b 3144
351df4b2 3145 /* restore for compacted data summary */
c376fc0f 3146 read_compacted_summaries(sbi);
351df4b2
JK		 3147 type = CURSEG_HOT_NODE;
3148 }
3149
119ee914 3150 if (__exist_node_summaries(sbi))
4d57b86d 3151 f2fs_ra_meta_pages(sbi, sum_blk_addr(sbi, NR_CURSEG_TYPE, type),
26879fb1 3152 NR_CURSEG_TYPE - type, META_CP, true);
3fa06d7b 3153
e4fc5fbf
CY		 3154 for (; type <= CURSEG_COLD_NODE; type++) {
3155 err = read_normal_summaries(sbi, type);
3156 if (err)
3157 return err;
3158 }
3159
21d3f8e1
JQ		 3160 /* sanity check for summary blocks */
3161 if (nats_in_cursum(nat_j) > NAT_JOURNAL_ENTRIES ||
3162 sits_in_cursum(sit_j) > SIT_JOURNAL_ENTRIES)
3163 return -EINVAL;
3164
351df4b2
JK		 3165 return 0;
3166}
3167
3168static void write_compacted_summaries(struct f2fs_sb_info *sbi, block_t blkaddr)
3169{
3170 struct page *page;
3171 unsigned char *kaddr;
3172 struct f2fs_summary *summary;
3173 struct curseg_info *seg_i;
3174 int written_size = 0;
3175 int i, j;
3176
4d57b86d 3177 page = f2fs_grab_meta_page(sbi, blkaddr++);
351df4b2 3178 kaddr = (unsigned char *)page_address(page);
81114baa 3179 memset(kaddr, 0, PAGE_SIZE);
351df4b2
JK		 3180
3181 /* Step 1: write nat cache */
3182 seg_i = CURSEG_I(sbi, CURSEG_HOT_DATA);
b7ad7512 3183 memcpy(kaddr, seg_i->journal, SUM_JOURNAL_SIZE);
351df4b2
JK		 3184 written_size += SUM_JOURNAL_SIZE;
3185
3186 /* Step 2: write sit cache */
3187 seg_i = CURSEG_I(sbi, CURSEG_COLD_DATA);
b7ad7512 3188 memcpy(kaddr + written_size, seg_i->journal, SUM_JOURNAL_SIZE);
351df4b2
JK		 3189 written_size += SUM_JOURNAL_SIZE;
3190
351df4b2
JK		 3191 /* Step 3: write summary entries */
3192 for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) {
3193 unsigned short blkoff;
3194 seg_i = CURSEG_I(sbi, i);
3195 if (sbi->ckpt->alloc_type[i] == SSR)
3196 blkoff = sbi->blocks_per_seg;
3197 else
3198 blkoff = curseg_blkoff(sbi, i);
3199
3200 for (j = 0; j < blkoff; j++) {
3201 if (!page) {
4d57b86d 3202 page = f2fs_grab_meta_page(sbi, blkaddr++);
351df4b2 3203 kaddr = (unsigned char *)page_address(page);
81114baa 3204 memset(kaddr, 0, PAGE_SIZE);
351df4b2
JK		 3205 written_size = 0;
3206 }
3207 summary = (struct f2fs_summary *)(kaddr + written_size);
3208 *summary = seg_i->sum_blk->entries[j];
3209 written_size += SUMMARY_SIZE;
351df4b2 3210
09cbfeaf 3211 if (written_size + SUMMARY_SIZE <= PAGE_SIZE -
351df4b2
JK		 3212 SUM_FOOTER_SIZE)
3213 continue;
3214
e8d61a74 3215 set_page_dirty(page);
351df4b2
JK		 3216 f2fs_put_page(page, 1);
3217 page = NULL;
3218 }
3219 }
e8d61a74
CY		 3220 if (page) {
3221 set_page_dirty(page);
351df4b2 3222 f2fs_put_page(page, 1);
e8d61a74 3223 }
351df4b2
JK		 3224}
3225
3226static void write_normal_summaries(struct f2fs_sb_info *sbi,
3227 block_t blkaddr, int type)
3228{
3229 int i, end;
3230 if (IS_DATASEG(type))
3231 end = type + NR_CURSEG_DATA_TYPE;
3232 else
3233 end = type + NR_CURSEG_NODE_TYPE;
3234
b7ad7512
CY		 3235 for (i = type; i < end; i++)
3236 write_current_sum_page(sbi, i, blkaddr + (i - type));
351df4b2
JK		 3237}
3238
4d57b86d 3239void f2fs_write_data_summaries(struct f2fs_sb_info *sbi, block_t start_blk)
351df4b2 3240{
aaec2b1d 3241 if (is_set_ckpt_flags(sbi, CP_COMPACT_SUM_FLAG))
351df4b2
JK		 3242 write_compacted_summaries(sbi, start_blk);
3243 else
3244 write_normal_summaries(sbi, start_blk, CURSEG_HOT_DATA);
3245}
3246
4d57b86d 3247void f2fs_write_node_summaries(struct f2fs_sb_info *sbi, block_t start_blk)
351df4b2 3248{
119ee914 3249 write_normal_summaries(sbi, start_blk, CURSEG_HOT_NODE);
351df4b2
JK		 3250}
3251
4d57b86d 3252int f2fs_lookup_journal_in_cursum(struct f2fs_journal *journal, int type,
351df4b2
JK		 3253 unsigned int val, int alloc)
3254{
3255 int i;
3256
3257 if (type == NAT_JOURNAL) {
dfc08a12
CY		 3258 for (i = 0; i < nats_in_cursum(journal); i++) {
3259 if (le32_to_cpu(nid_in_journal(journal, i)) == val)
351df4b2
JK		 3260 return i;
3261 }
dfc08a12
CY		 3262 if (alloc && __has_cursum_space(journal, 1, NAT_JOURNAL))
3263 return update_nats_in_cursum(journal, 1);
351df4b2 3264 } else if (type == SIT_JOURNAL) {
dfc08a12
CY		 3265 for (i = 0; i < sits_in_cursum(journal); i++)
3266 if (le32_to_cpu(segno_in_journal(journal, i)) == val)
351df4b2 3267 return i;
dfc08a12
CY		 3268 if (alloc && __has_cursum_space(journal, 1, SIT_JOURNAL))
3269 return update_sits_in_cursum(journal, 1);
351df4b2
JK		 3270 }
3271 return -1;
3272}
3273
3274static struct page *get_current_sit_page(struct f2fs_sb_info *sbi,
3275 unsigned int segno)
3276{
4d57b86d 3277 return f2fs_get_meta_page(sbi, current_sit_addr(sbi, segno));
351df4b2
JK		 3278}
3279
3280static struct page *get_next_sit_page(struct f2fs_sb_info *sbi,
3281 unsigned int start)
3282{
3283 struct sit_info *sit_i = SIT_I(sbi);
068c3cd8 3284 struct page *page;
351df4b2 3285 pgoff_t src_off, dst_off;
351df4b2
JK		 3286
3287 src_off = current_sit_addr(sbi, start);
3288 dst_off = next_sit_addr(sbi, src_off);
3289
4d57b86d 3290 page = f2fs_grab_meta_page(sbi, dst_off);
068c3cd8 3291 seg_info_to_sit_page(sbi, page, start);
351df4b2 3292
068c3cd8 3293 set_page_dirty(page);
351df4b2
JK		 3294 set_to_next_sit(sit_i, start);
3295
068c3cd8 3296 return page;
351df4b2
JK		 3297}
3298
184a5cd2
CY		 3299static struct sit_entry_set *grab_sit_entry_set(void)
3300{
3301 struct sit_entry_set *ses =
80c54505 3302 f2fs_kmem_cache_alloc(sit_entry_set_slab, GFP_NOFS);
184a5cd2
CY		 3303
3304 ses->entry_cnt = 0;
3305 INIT_LIST_HEAD(&ses->set_list);
3306 return ses;
3307}
3308
3309static void release_sit_entry_set(struct sit_entry_set *ses)
3310{
3311 list_del(&ses->set_list);
3312 kmem_cache_free(sit_entry_set_slab, ses);
3313}
3314
3315static void adjust_sit_entry_set(struct sit_entry_set *ses,
3316 struct list_head *head)
3317{
3318 struct sit_entry_set *next = ses;
3319
3320 if (list_is_last(&ses->set_list, head))
3321 return;
3322
3323 list_for_each_entry_continue(next, head, set_list)
3324 if (ses->entry_cnt <= next->entry_cnt)
3325 break;
3326
3327 list_move_tail(&ses->set_list, &next->set_list);
3328}
3329
3330static void add_sit_entry(unsigned int segno, struct list_head *head)
3331{
3332 struct sit_entry_set *ses;
3333 unsigned int start_segno = START_SEGNO(segno);
3334
3335 list_for_each_entry(ses, head, set_list) {
3336 if (ses->start_segno == start_segno) {
3337 ses->entry_cnt++;
3338 adjust_sit_entry_set(ses, head);
3339 return;
3340 }
3341 }
3342
3343 ses = grab_sit_entry_set();
3344
3345 ses->start_segno = start_segno;
3346 ses->entry_cnt++;
3347 list_add(&ses->set_list, head);
3348}
3349
3350static void add_sits_in_set(struct f2fs_sb_info *sbi)
3351{
3352 struct f2fs_sm_info *sm_info = SM_I(sbi);
3353 struct list_head *set_list = &sm_info->sit_entry_set;
3354 unsigned long *bitmap = SIT_I(sbi)->dirty_sentries_bitmap;
184a5cd2
CY		 3355 unsigned int segno;
3356
7cd8558b 3357 for_each_set_bit(segno, bitmap, MAIN_SEGS(sbi))
184a5cd2
CY		 3358 add_sit_entry(segno, set_list);
3359}
3360
3361static void remove_sits_in_journal(struct f2fs_sb_info *sbi)
351df4b2
JK		 3362{
3363 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA);
b7ad7512 3364 struct f2fs_journal *journal = curseg->journal;
351df4b2
JK		 3365 int i;
3366
b7ad7512 3367 down_write(&curseg->journal_rwsem);
dfc08a12 3368 for (i = 0; i < sits_in_cursum(journal); i++) {
184a5cd2
CY		 3369 unsigned int segno;
3370 bool dirtied;
3371
dfc08a12 3372 segno = le32_to_cpu(segno_in_journal(journal, i));
184a5cd2
CY		 3373 dirtied = __mark_sit_entry_dirty(sbi, segno);
3374
3375 if (!dirtied)
3376 add_sit_entry(segno, &SM_I(sbi)->sit_entry_set);
351df4b2 3377 }
dfc08a12 3378 update_sits_in_cursum(journal, -i);
b7ad7512 3379 up_write(&curseg->journal_rwsem);
351df4b2
JK		 3380}
3381
0a8165d7 3382/*
351df4b2
JK		 3383 * CP calls this function, which flushes SIT entries including sit_journal,
3384 * and moves prefree segs to free segs.
3385 */
4d57b86d 3386void f2fs_flush_sit_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc)
351df4b2
JK		 3387{
3388 struct sit_info *sit_i = SIT_I(sbi);
3389 unsigned long *bitmap = sit_i->dirty_sentries_bitmap;
3390 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA);
b7ad7512 3391 struct f2fs_journal *journal = curseg->journal;
184a5cd2
CY		 3392 struct sit_entry_set *ses, *tmp;
3393 struct list_head *head = &SM_I(sbi)->sit_entry_set;
184a5cd2 3394 bool to_journal = true;
4b2fecc8 3395 struct seg_entry *se;
351df4b2 3396
3d26fa6b 3397 down_write(&sit_i->sentry_lock);
351df4b2 3398
2b11a74b
WL		 3399 if (!sit_i->dirty_sentries)
3400 goto out;
3401
351df4b2 3402 /*
184a5cd2
CY		 3403 * add and account sit entries of dirty bitmap in sit entry
3404 * set temporarily
351df4b2 3405 */
184a5cd2 3406 add_sits_in_set(sbi);
351df4b2 3407
184a5cd2
CY		 3408 /*
3409 * if there are no enough space in journal to store dirty sit
3410 * entries, remove all entries from journal and add and account
3411 * them in sit entry set.
3412 */
dfc08a12 3413 if (!__has_cursum_space(journal, sit_i->dirty_sentries, SIT_JOURNAL))
184a5cd2 3414 remove_sits_in_journal(sbi);
b2955550 3415
184a5cd2
CY		 3416 /*
3417 * there are two steps to flush sit entries:
3418 * #1, flush sit entries to journal in current cold data summary block.
3419 * #2, flush sit entries to sit page.
3420 */
3421 list_for_each_entry_safe(ses, tmp, head, set_list) {
4a257ed6 3422 struct page *page = NULL;
184a5cd2
CY		 3423 struct f2fs_sit_block *raw_sit = NULL;
3424 unsigned int start_segno = ses->start_segno;
3425 unsigned int end = min(start_segno + SIT_ENTRY_PER_BLOCK,
7cd8558b 3426 (unsigned long)MAIN_SEGS(sbi));
184a5cd2
CY		 3427 unsigned int segno = start_segno;
3428
3429 if (to_journal &&
dfc08a12 3430 !__has_cursum_space(journal, ses->entry_cnt, SIT_JOURNAL))
184a5cd2
CY		 3431 to_journal = false;
3432
b7ad7512
CY		 3433 if (to_journal) {
3434 down_write(&curseg->journal_rwsem);
3435 } else {
184a5cd2
CY		 3436 page = get_next_sit_page(sbi, start_segno);
3437 raw_sit = page_address(page);
351df4b2 3438 }
351df4b2 3439
184a5cd2
CY		 3440 /* flush dirty sit entries in region of current sit set */
3441 for_each_set_bit_from(segno, bitmap, end) {
3442 int offset, sit_offset;
4b2fecc8
JK		 3443
3444 se = get_seg_entry(sbi, segno);
56b07e7e
ZZ		 3445#ifdef CONFIG_F2FS_CHECK_FS
3446 if (memcmp(se->cur_valid_map, se->cur_valid_map_mir,
3447 SIT_VBLOCK_MAP_SIZE))
3448 f2fs_bug_on(sbi, 1);
3449#endif
184a5cd2
CY		 3450
3451 /* add discard candidates */
c473f1a9 3452 if (!(cpc->reason & CP_DISCARD)) {
4b2fecc8 3453 cpc->trim_start = segno;
25290fa5 3454 add_discard_addrs(sbi, cpc, false);
4b2fecc8 3455 }
184a5cd2
CY		 3456
3457 if (to_journal) {
4d57b86d 3458 offset = f2fs_lookup_journal_in_cursum(journal,
184a5cd2
CY		 3459 SIT_JOURNAL, segno, 1);
3460 f2fs_bug_on(sbi, offset < 0);
dfc08a12 3461 segno_in_journal(journal, offset) =
184a5cd2
CY		 3462 cpu_to_le32(segno);
3463 seg_info_to_raw_sit(se,
dfc08a12 3464 &sit_in_journal(journal, offset));
56b07e7e
ZZ		 3465 check_block_count(sbi, segno,
3466 &sit_in_journal(journal, offset));
184a5cd2
CY		 3467 } else {
3468 sit_offset = SIT_ENTRY_OFFSET(sit_i, segno);
3469 seg_info_to_raw_sit(se,
3470 &raw_sit->entries[sit_offset]);
56b07e7e
ZZ		 3471 check_block_count(sbi, segno,
3472 &raw_sit->entries[sit_offset]);
184a5cd2 3473 }
351df4b2 3474
184a5cd2
CY		 3475 __clear_bit(segno, bitmap);
3476 sit_i->dirty_sentries--;
3477 ses->entry_cnt--;
351df4b2
JK		 3478 }
3479
b7ad7512
CY		 3480 if (to_journal)
3481 up_write(&curseg->journal_rwsem);
3482 else
184a5cd2
CY		 3483 f2fs_put_page(page, 1);
3484
3485 f2fs_bug_on(sbi, ses->entry_cnt);
3486 release_sit_entry_set(ses);
351df4b2 3487 }
184a5cd2
CY		 3488
3489 f2fs_bug_on(sbi, !list_empty(head));
3490 f2fs_bug_on(sbi, sit_i->dirty_sentries);
184a5cd2 3491out:
c473f1a9 3492 if (cpc->reason & CP_DISCARD) {
650d3c4e
YH		 3493 __u64 trim_start = cpc->trim_start;
3494
4b2fecc8 3495 for (; cpc->trim_start <= cpc->trim_end; cpc->trim_start++)
25290fa5 3496 add_discard_addrs(sbi, cpc, false);
650d3c4e
YH		 3497
3498 cpc->trim_start = trim_start;
4b2fecc8 3499 }
3d26fa6b 3500 up_write(&sit_i->sentry_lock);
351df4b2 3501
351df4b2
JK		 3502 set_prefree_as_free_segments(sbi);
3503}
3504
3505static int build_sit_info(struct f2fs_sb_info *sbi)
3506{
3507 struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
351df4b2
JK		 3508 struct sit_info *sit_i;
3509 unsigned int sit_segs, start;
ae27d62e 3510 char *src_bitmap;
351df4b2
JK		 3511 unsigned int bitmap_size;
3512
3513 /* allocate memory for SIT information */
acbf054d 3514 sit_i = f2fs_kzalloc(sbi, sizeof(struct sit_info), GFP_KERNEL);
351df4b2
JK		 3515 if (!sit_i)
3516 return -ENOMEM;
3517
3518 SM_I(sbi)->sit_info = sit_i;
3519
9d2a789c
KC		 3520 sit_i->sentries =
3521 f2fs_kvzalloc(sbi, array_size(sizeof(struct seg_entry),
3522 MAIN_SEGS(sbi)),
3523 GFP_KERNEL);
351df4b2
JK		 3524 if (!sit_i->sentries)
3525 return -ENOMEM;
3526
7cd8558b 3527 bitmap_size = f2fs_bitmap_size(MAIN_SEGS(sbi));
628b3d14
CY		 3528 sit_i->dirty_sentries_bitmap = f2fs_kvzalloc(sbi, bitmap_size,
3529 GFP_KERNEL);
351df4b2
JK		 3530 if (!sit_i->dirty_sentries_bitmap)
3531 return -ENOMEM;
3532
7cd8558b 3533 for (start = 0; start < MAIN_SEGS(sbi); start++) {
351df4b2 3534 sit_i->sentries[start].cur_valid_map
acbf054d 3535 = f2fs_kzalloc(sbi, SIT_VBLOCK_MAP_SIZE, GFP_KERNEL);
351df4b2 3536 sit_i->sentries[start].ckpt_valid_map
acbf054d 3537 = f2fs_kzalloc(sbi, SIT_VBLOCK_MAP_SIZE, GFP_KERNEL);
a66cdd98 3538 if (!sit_i->sentries[start].cur_valid_map ||
3e025740 3539 !sit_i->sentries[start].ckpt_valid_map)
351df4b2 3540 return -ENOMEM;
3e025740 3541
355e7891
CY		 3542#ifdef CONFIG_F2FS_CHECK_FS
3543 sit_i->sentries[start].cur_valid_map_mir
acbf054d 3544 = f2fs_kzalloc(sbi, SIT_VBLOCK_MAP_SIZE, GFP_KERNEL);
355e7891
CY		 3545 if (!sit_i->sentries[start].cur_valid_map_mir)
3546 return -ENOMEM;
3547#endif
3548
3e025740
JK		 3549 if (f2fs_discard_en(sbi)) {
3550 sit_i->sentries[start].discard_map
acbf054d
CY		 3551 = f2fs_kzalloc(sbi, SIT_VBLOCK_MAP_SIZE,
3552 GFP_KERNEL);
3e025740
JK		 3553 if (!sit_i->sentries[start].discard_map)
3554 return -ENOMEM;
3555 }
351df4b2
JK		 3556 }
3557
acbf054d 3558 sit_i->tmp_map = f2fs_kzalloc(sbi, SIT_VBLOCK_MAP_SIZE, GFP_KERNEL);
60a3b782
JK		 3559 if (!sit_i->tmp_map)
3560 return -ENOMEM;
3561
351df4b2 3562 if (sbi->segs_per_sec > 1) {
9d2a789c
KC		 3563 sit_i->sec_entries =
3564 f2fs_kvzalloc(sbi, array_size(sizeof(struct sec_entry),
3565 MAIN_SECS(sbi)),
3566 GFP_KERNEL);
351df4b2
JK		 3567 if (!sit_i->sec_entries)
3568 return -ENOMEM;
3569 }
3570
3571 /* get information related with SIT */
3572 sit_segs = le32_to_cpu(raw_super->segment_count_sit) >> 1;
3573
3574 /* setup SIT bitmap from ckeckpoint pack */
3575 bitmap_size = __bitmap_size(sbi, SIT_BITMAP);
3576 src_bitmap = __bitmap_ptr(sbi, SIT_BITMAP);
3577
ae27d62e
CY		 3578 sit_i->sit_bitmap = kmemdup(src_bitmap, bitmap_size, GFP_KERNEL);
3579 if (!sit_i->sit_bitmap)
351df4b2 3580 return -ENOMEM;
351df4b2 3581
ae27d62e
CY		 3582#ifdef CONFIG_F2FS_CHECK_FS
3583 sit_i->sit_bitmap_mir = kmemdup(src_bitmap, bitmap_size, GFP_KERNEL);
3584 if (!sit_i->sit_bitmap_mir)
3585 return -ENOMEM;
3586#endif
3587
351df4b2
JK		 3588 /* init SIT information */
3589 sit_i->s_ops = &default_salloc_ops;
3590
3591 sit_i->sit_base_addr = le32_to_cpu(raw_super->sit_blkaddr);
3592 sit_i->sit_blocks = sit_segs << sbi->log_blocks_per_seg;
c79b7ff1 3593 sit_i->written_valid_blocks = 0;
351df4b2
JK		 3594 sit_i->bitmap_size = bitmap_size;
3595 sit_i->dirty_sentries = 0;
3596 sit_i->sents_per_block = SIT_ENTRY_PER_BLOCK;
3597 sit_i->elapsed_time = le64_to_cpu(sbi->ckpt->elapsed_time);
48fbfe50 3598 sit_i->mounted_time = ktime_get_real_seconds();
3d26fa6b 3599 init_rwsem(&sit_i->sentry_lock);
351df4b2
JK		 3600 return 0;
3601}
3602
3603static int build_free_segmap(struct f2fs_sb_info *sbi)
3604{
351df4b2
JK		 3605 struct free_segmap_info *free_i;
3606 unsigned int bitmap_size, sec_bitmap_size;
3607
3608 /* allocate memory for free segmap information */
acbf054d 3609 free_i = f2fs_kzalloc(sbi, sizeof(struct free_segmap_info), GFP_KERNEL);
351df4b2
JK		 3610 if (!free_i)
3611 return -ENOMEM;
3612
3613 SM_I(sbi)->free_info = free_i;
3614
7cd8558b 3615 bitmap_size = f2fs_bitmap_size(MAIN_SEGS(sbi));
628b3d14 3616 free_i->free_segmap = f2fs_kvmalloc(sbi, bitmap_size, GFP_KERNEL);
351df4b2
JK		 3617 if (!free_i->free_segmap)
3618 return -ENOMEM;
3619
7cd8558b 3620 sec_bitmap_size = f2fs_bitmap_size(MAIN_SECS(sbi));
628b3d14 3621 free_i->free_secmap = f2fs_kvmalloc(sbi, sec_bitmap_size, GFP_KERNEL);
351df4b2
JK		 3622 if (!free_i->free_secmap)
3623 return -ENOMEM;
3624
3625 /* set all segments as dirty temporarily */
3626 memset(free_i->free_segmap, 0xff, bitmap_size);
3627 memset(free_i->free_secmap, 0xff, sec_bitmap_size);
3628
3629 /* init free segmap information */
7cd8558b 3630 free_i->start_segno = GET_SEGNO_FROM_SEG0(sbi, MAIN_BLKADDR(sbi));
351df4b2
JK		 3631 free_i->free_segments = 0;
3632 free_i->free_sections = 0;
1a118ccf 3633 spin_lock_init(&free_i->segmap_lock);
351df4b2
JK		 3634 return 0;
3635}
3636
3637static int build_curseg(struct f2fs_sb_info *sbi)
3638{
1042d60f 3639 struct curseg_info *array;
351df4b2
JK		 3640 int i;
3641
026f0507
KC		 3642 array = f2fs_kzalloc(sbi, array_size(NR_CURSEG_TYPE, sizeof(*array)),
3643 GFP_KERNEL);
351df4b2
JK		 3644 if (!array)
3645 return -ENOMEM;
3646
3647 SM_I(sbi)->curseg_array = array;
3648
3649 for (i = 0; i < NR_CURSEG_TYPE; i++) {
3650 mutex_init(&array[i].curseg_mutex);
acbf054d 3651 array[i].sum_blk = f2fs_kzalloc(sbi, PAGE_SIZE, GFP_KERNEL);
351df4b2
JK		 3652 if (!array[i].sum_blk)
3653 return -ENOMEM;
b7ad7512 3654 init_rwsem(&array[i].journal_rwsem);
acbf054d
CY		 3655 array[i].journal = f2fs_kzalloc(sbi,
3656 sizeof(struct f2fs_journal), GFP_KERNEL);
b7ad7512
CY		 3657 if (!array[i].journal)
3658 return -ENOMEM;
351df4b2
JK		 3659 array[i].segno = NULL_SEGNO;
3660 array[i].next_blkoff = 0;
3661 }
3662 return restore_curseg_summaries(sbi);
3663}
3664
c39a1b34 3665static int build_sit_entries(struct f2fs_sb_info *sbi)
351df4b2
JK		 3666{
3667 struct sit_info *sit_i = SIT_I(sbi);
3668 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA);
b7ad7512 3669 struct f2fs_journal *journal = curseg->journal;
9c094040
YH		 3670 struct seg_entry *se;
3671 struct f2fs_sit_entry sit;
74de593a
CY		 3672 int sit_blk_cnt = SIT_BLK_CNT(sbi);
3673 unsigned int i, start, end;
3674 unsigned int readed, start_blk = 0;
c39a1b34 3675 int err = 0;
8a29c126 3676 block_t total_node_blocks = 0;
351df4b2 3677
74de593a 3678 do {
4d57b86d 3679 readed = f2fs_ra_meta_pages(sbi, start_blk, BIO_MAX_PAGES,
664ba972 3680 META_SIT, true);
74de593a
CY		 3681
3682 start = start_blk * sit_i->sents_per_block;
3683 end = (start_blk + readed) * sit_i->sents_per_block;
3684
7cd8558b 3685 for (; start < end && start < MAIN_SEGS(sbi); start++) {
74de593a 3686 struct f2fs_sit_block *sit_blk;
74de593a
CY		 3687 struct page *page;
3688
9c094040 3689 se = &sit_i->sentries[start];
74de593a
CY		 3690 page = get_current_sit_page(sbi, start);
3691 sit_blk = (struct f2fs_sit_block *)page_address(page);
3692 sit = sit_blk->entries[SIT_ENTRY_OFFSET(sit_i, start)];
3693 f2fs_put_page(page, 1);
d600af23 3694
c39a1b34
JK		 3695 err = check_block_count(sbi, start, &sit);
3696 if (err)
3697 return err;
74de593a 3698 seg_info_from_raw_sit(se, &sit);
8a29c126
JK		 3699 if (IS_NODESEG(se->type))
3700 total_node_blocks += se->valid_blocks;
a66cdd98
JK		 3701
3702 /* build discard map only one time */
3e025740 3703 if (f2fs_discard_en(sbi)) {
1f43e2ad
CY		 3704 if (is_set_ckpt_flags(sbi, CP_TRIMMED_FLAG)) {
3705 memset(se->discard_map, 0xff,
3706 SIT_VBLOCK_MAP_SIZE);
3707 } else {
3708 memcpy(se->discard_map,
3709 se->cur_valid_map,
3710 SIT_VBLOCK_MAP_SIZE);
3711 sbi->discard_blks +=
3712 sbi->blocks_per_seg -
3713 se->valid_blocks;
3714 }
3e025740 3715 }
a66cdd98 3716
d600af23
CY		 3717 if (sbi->segs_per_sec > 1)
3718 get_sec_entry(sbi, start)->valid_blocks +=
3719 se->valid_blocks;
351df4b2 3720 }
74de593a
CY		 3721 start_blk += readed;
3722 } while (start_blk < sit_blk_cnt);
d600af23
CY		 3723
3724 down_read(&curseg->journal_rwsem);
3725 for (i = 0; i < sits_in_cursum(journal); i++) {
d600af23
CY		 3726 unsigned int old_valid_blocks;
3727
3728 start = le32_to_cpu(segno_in_journal(journal, i));
b2ca374f
JK		 3729 if (start >= MAIN_SEGS(sbi)) {
3730 f2fs_msg(sbi->sb, KERN_ERR,
3731 "Wrong journal entry on segno %u",
3732 start);
3733 set_sbi_flag(sbi, SBI_NEED_FSCK);
3734 err = -EINVAL;
3735 break;
3736 }
3737
d600af23
CY		 3738 se = &sit_i->sentries[start];
3739 sit = sit_in_journal(journal, i);
3740
3741 old_valid_blocks = se->valid_blocks;
8a29c126
JK		 3742 if (IS_NODESEG(se->type))
3743 total_node_blocks -= old_valid_blocks;
d600af23 3744
c39a1b34
JK		 3745 err = check_block_count(sbi, start, &sit);
3746 if (err)
3747 break;
d600af23 3748 seg_info_from_raw_sit(se, &sit);
8a29c126
JK		 3749 if (IS_NODESEG(se->type))
3750 total_node_blocks += se->valid_blocks;
d600af23
CY		 3751
3752 if (f2fs_discard_en(sbi)) {
1f43e2ad
CY		 3753 if (is_set_ckpt_flags(sbi, CP_TRIMMED_FLAG)) {
3754 memset(se->discard_map, 0xff,
3755 SIT_VBLOCK_MAP_SIZE);
3756 } else {
3757 memcpy(se->discard_map, se->cur_valid_map,
3758 SIT_VBLOCK_MAP_SIZE);
a9af3fdc
CY		 3759 sbi->discard_blks += old_valid_blocks;
3760 sbi->discard_blks -= se->valid_blocks;
1f43e2ad 3761 }
d600af23
CY		 3762 }
3763
a9af3fdc 3764 if (sbi->segs_per_sec > 1) {
d600af23 3765 get_sec_entry(sbi, start)->valid_blocks +=
a9af3fdc
CY		 3766 se->valid_blocks;
3767 get_sec_entry(sbi, start)->valid_blocks -=
3768 old_valid_blocks;
3769 }
d600af23
CY		 3770 }
3771 up_read(&curseg->journal_rwsem);
8a29c126
JK		 3772
3773 if (!err && total_node_blocks != valid_node_count(sbi)) {
3774 f2fs_msg(sbi->sb, KERN_ERR,
3775 "SIT is corrupted node# %u vs %u",
3776 total_node_blocks, valid_node_count(sbi));
3777 set_sbi_flag(sbi, SBI_NEED_FSCK);
3778 err = -EINVAL;
3779 }
3780
c39a1b34 3781 return err;
351df4b2
JK		 3782}
3783
3784static void init_free_segmap(struct f2fs_sb_info *sbi)
3785{
3786 unsigned int start;
3787 int type;
3788
7cd8558b 3789 for (start = 0; start < MAIN_SEGS(sbi); start++) {
351df4b2
JK		 3790 struct seg_entry *sentry = get_seg_entry(sbi, start);
3791 if (!sentry->valid_blocks)
3792 __set_free(sbi, start);
c79b7ff1
JK		 3793 else
3794 SIT_I(sbi)->written_valid_blocks +=
3795 sentry->valid_blocks;
351df4b2
JK		 3796 }
3797
3798 /* set use the current segments */
3799 for (type = CURSEG_HOT_DATA; type <= CURSEG_COLD_NODE; type++) {
3800 struct curseg_info *curseg_t = CURSEG_I(sbi, type);
3801 __set_test_and_inuse(sbi, curseg_t->segno);
3802 }
3803}
3804
3805static void init_dirty_segmap(struct f2fs_sb_info *sbi)
3806{
3807 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
3808 struct free_segmap_info *free_i = FREE_I(sbi);
7cd8558b 3809 unsigned int segno = 0, offset = 0;
351df4b2
JK		 3810 unsigned short valid_blocks;
3811
8736fbf0 3812 while (1) {
351df4b2 3813 /* find dirty segment based on free segmap */
7cd8558b
JK		 3814 segno = find_next_inuse(free_i, MAIN_SEGS(sbi), offset);
3815 if (segno >= MAIN_SEGS(sbi))
351df4b2
JK		 3816 break;
3817 offset = segno + 1;
302bd348 3818 valid_blocks = get_valid_blocks(sbi, segno, false);
ec325b52 3819 if (valid_blocks == sbi->blocks_per_seg || !valid_blocks)
351df4b2 3820 continue;
ec325b52
JK		 3821 if (valid_blocks > sbi->blocks_per_seg) {
3822 f2fs_bug_on(sbi, 1);
3823 continue;
3824 }
351df4b2
JK		 3825 mutex_lock(&dirty_i->seglist_lock);
3826 __locate_dirty_segment(sbi, segno, DIRTY);
3827 mutex_unlock(&dirty_i->seglist_lock);
3828 }
3829}
3830
5ec4e49f 3831static int init_victim_secmap(struct f2fs_sb_info *sbi)
351df4b2
JK		 3832{
3833 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
7cd8558b 3834 unsigned int bitmap_size = f2fs_bitmap_size(MAIN_SECS(sbi));
351df4b2 3835
628b3d14 3836 dirty_i->victim_secmap = f2fs_kvzalloc(sbi, bitmap_size, GFP_KERNEL);
5ec4e49f 3837 if (!dirty_i->victim_secmap)
351df4b2
JK		 3838 return -ENOMEM;
3839 return 0;
3840}
3841
3842static int build_dirty_segmap(struct f2fs_sb_info *sbi)
3843{
3844 struct dirty_seglist_info *dirty_i;
3845 unsigned int bitmap_size, i;
3846
3847 /* allocate memory for dirty segments list information */
acbf054d
CY		 3848 dirty_i = f2fs_kzalloc(sbi, sizeof(struct dirty_seglist_info),
3849 GFP_KERNEL);
351df4b2
JK		 3850 if (!dirty_i)
3851 return -ENOMEM;
3852
3853 SM_I(sbi)->dirty_info = dirty_i;
3854 mutex_init(&dirty_i->seglist_lock);
3855
7cd8558b 3856 bitmap_size = f2fs_bitmap_size(MAIN_SEGS(sbi));
351df4b2
JK		 3857
3858 for (i = 0; i < NR_DIRTY_TYPE; i++) {
628b3d14
CY		 3859 dirty_i->dirty_segmap[i] = f2fs_kvzalloc(sbi, bitmap_size,
3860 GFP_KERNEL);
351df4b2
JK		 3861 if (!dirty_i->dirty_segmap[i])
3862 return -ENOMEM;
3863 }
3864
3865 init_dirty_segmap(sbi);
5ec4e49f 3866 return init_victim_secmap(sbi);
351df4b2
JK		 3867}
3868
0a8165d7 3869/*
351df4b2
JK		 3870 * Update min, max modified time for cost-benefit GC algorithm
3871 */
3872static void init_min_max_mtime(struct f2fs_sb_info *sbi)
3873{
3874 struct sit_info *sit_i = SIT_I(sbi);
3875 unsigned int segno;
3876
3d26fa6b 3877 down_write(&sit_i->sentry_lock);
351df4b2 3878
5ad25442 3879 sit_i->min_mtime = ULLONG_MAX;
351df4b2 3880
7cd8558b 3881 for (segno = 0; segno < MAIN_SEGS(sbi); segno += sbi->segs_per_sec) {
351df4b2
JK		 3882 unsigned int i;
3883 unsigned long long mtime = 0;
3884
3885 for (i = 0; i < sbi->segs_per_sec; i++)
3886 mtime += get_seg_entry(sbi, segno + i)->mtime;
3887
3888 mtime = div_u64(mtime, sbi->segs_per_sec);
3889
3890 if (sit_i->min_mtime > mtime)
3891 sit_i->min_mtime = mtime;
3892 }
a1f72ac2 3893 sit_i->max_mtime = get_mtime(sbi, false);
3d26fa6b 3894 up_write(&sit_i->sentry_lock);
351df4b2
JK		 3895}
3896
4d57b86d 3897int f2fs_build_segment_manager(struct f2fs_sb_info *sbi)
351df4b2
JK		 3898{
3899 struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
3900 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1042d60f 3901 struct f2fs_sm_info *sm_info;
351df4b2
JK		 3902 int err;
3903
acbf054d 3904 sm_info = f2fs_kzalloc(sbi, sizeof(struct f2fs_sm_info), GFP_KERNEL);
351df4b2
JK		 3905 if (!sm_info)
3906 return -ENOMEM;
3907
3908 /* init sm info */
3909 sbi->sm_info = sm_info;
351df4b2
JK		 3910 sm_info->seg0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr);
3911 sm_info->main_blkaddr = le32_to_cpu(raw_super->main_blkaddr);
3912 sm_info->segment_count = le32_to_cpu(raw_super->segment_count);
3913 sm_info->reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
3914 sm_info->ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
3915 sm_info->main_segments = le32_to_cpu(raw_super->segment_count_main);
3916 sm_info->ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
58c41035
JK		 3917 sm_info->rec_prefree_segments = sm_info->main_segments *
3918 DEF_RECLAIM_PREFREE_SEGMENTS / 100;
44a83499
JK		 3919 if (sm_info->rec_prefree_segments > DEF_MAX_RECLAIM_PREFREE_SEGMENTS)
3920 sm_info->rec_prefree_segments = DEF_MAX_RECLAIM_PREFREE_SEGMENTS;
3921
52763a4b
JK		 3922 if (!test_opt(sbi, LFS))
3923 sm_info->ipu_policy = 1 << F2FS_IPU_FSYNC;
216fbd64 3924 sm_info->min_ipu_util = DEF_MIN_IPU_UTIL;
c1ce1b02 3925 sm_info->min_fsync_blocks = DEF_MIN_FSYNC_BLOCKS;
ef095d19 3926 sm_info->min_hot_blocks = DEF_MIN_HOT_BLOCKS;
a2a12b67 3927 sm_info->min_ssr_sections = reserved_sections(sbi);
351df4b2 3928
184a5cd2
CY		 3929 INIT_LIST_HEAD(&sm_info->sit_entry_set);
3930
2b60311d
CY		 3931 init_rwsem(&sm_info->curseg_lock);
3932
d4fdf8ba 3933 if (!f2fs_readonly(sbi->sb)) {
4d57b86d 3934 err = f2fs_create_flush_cmd_control(sbi);
2163d198 3935 if (err)
a688b9d9 3936 return err;
6b4afdd7
JK		 3937 }
3938
0b54fb84
JK		 3939 err = create_discard_cmd_control(sbi);
3940 if (err)
3941 return err;
3942
351df4b2
JK		 3943 err = build_sit_info(sbi);
3944 if (err)
3945 return err;
3946 err = build_free_segmap(sbi);
3947 if (err)
3948 return err;
3949 err = build_curseg(sbi);
3950 if (err)
3951 return err;
3952
3953 /* reinit free segmap based on SIT */
c39a1b34
JK		 3954 err = build_sit_entries(sbi);
3955 if (err)
3956 return err;
351df4b2
JK		 3957
3958 init_free_segmap(sbi);
3959 err = build_dirty_segmap(sbi);
3960 if (err)
3961 return err;
3962
3963 init_min_max_mtime(sbi);
3964 return 0;
3965}
3966
3967static void discard_dirty_segmap(struct f2fs_sb_info *sbi,
3968 enum dirty_type dirty_type)
3969{
3970 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
3971
3972 mutex_lock(&dirty_i->seglist_lock);
39307a8e 3973 kvfree(dirty_i->dirty_segmap[dirty_type]);
351df4b2
JK		 3974 dirty_i->nr_dirty[dirty_type] = 0;
3975 mutex_unlock(&dirty_i->seglist_lock);
3976}
3977
5ec4e49f 3978static void destroy_victim_secmap(struct f2fs_sb_info *sbi)
351df4b2
JK		 3979{
3980 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
39307a8e 3981 kvfree(dirty_i->victim_secmap);
351df4b2
JK		 3982}
3983
3984static void destroy_dirty_segmap(struct f2fs_sb_info *sbi)
3985{
3986 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
3987 int i;
3988
3989 if (!dirty_i)
3990 return;
3991
3992 /* discard pre-free/dirty segments list */
3993 for (i = 0; i < NR_DIRTY_TYPE; i++)
3994 discard_dirty_segmap(sbi, i);
3995
5ec4e49f 3996 destroy_victim_secmap(sbi);
351df4b2
JK		 3997 SM_I(sbi)->dirty_info = NULL;
3998 kfree(dirty_i);
3999}
4000
4001static void destroy_curseg(struct f2fs_sb_info *sbi)
4002{
4003 struct curseg_info *array = SM_I(sbi)->curseg_array;
4004 int i;
4005
4006 if (!array)
4007 return;
4008 SM_I(sbi)->curseg_array = NULL;
b7ad7512 4009 for (i = 0; i < NR_CURSEG_TYPE; i++) {
351df4b2 4010 kfree(array[i].sum_blk);
b7ad7512
CY		 4011 kfree(array[i].journal);
4012 }
351df4b2
JK		 4013 kfree(array);
4014}
4015
4016static void destroy_free_segmap(struct f2fs_sb_info *sbi)
4017{
4018 struct free_segmap_info *free_i = SM_I(sbi)->free_info;
4019 if (!free_i)
4020 return;
4021 SM_I(sbi)->free_info = NULL;
39307a8e
JK		 4022 kvfree(free_i->free_segmap);
4023 kvfree(free_i->free_secmap);
351df4b2
JK		 4024 kfree(free_i);
4025}
4026
4027static void destroy_sit_info(struct f2fs_sb_info *sbi)
4028{
4029 struct sit_info *sit_i = SIT_I(sbi);
4030 unsigned int start;
4031
4032 if (!sit_i)
4033 return;
4034
4035 if (sit_i->sentries) {
7cd8558b 4036 for (start = 0; start < MAIN_SEGS(sbi); start++) {
351df4b2 4037 kfree(sit_i->sentries[start].cur_valid_map);
355e7891
CY		 4038#ifdef CONFIG_F2FS_CHECK_FS
4039 kfree(sit_i->sentries[start].cur_valid_map_mir);
4040#endif
351df4b2 4041 kfree(sit_i->sentries[start].ckpt_valid_map);
a66cdd98 4042 kfree(sit_i->sentries[start].discard_map);
351df4b2
JK		 4043 }
4044 }
60a3b782
JK		 4045 kfree(sit_i->tmp_map);
4046
39307a8e
JK		 4047 kvfree(sit_i->sentries);
4048 kvfree(sit_i->sec_entries);
4049 kvfree(sit_i->dirty_sentries_bitmap);
351df4b2
JK		 4050
4051 SM_I(sbi)->sit_info = NULL;
4052 kfree(sit_i->sit_bitmap);
ae27d62e
CY		 4053#ifdef CONFIG_F2FS_CHECK_FS
4054 kfree(sit_i->sit_bitmap_mir);
4055#endif
351df4b2
JK		 4056 kfree(sit_i);
4057}
4058
4d57b86d 4059void f2fs_destroy_segment_manager(struct f2fs_sb_info *sbi)
351df4b2
JK		 4060{
4061 struct f2fs_sm_info *sm_info = SM_I(sbi);
a688b9d9 4062
3b03f724
CY		 4063 if (!sm_info)
4064 return;
4d57b86d 4065 f2fs_destroy_flush_cmd_control(sbi, true);
f099405f 4066 destroy_discard_cmd_control(sbi);
351df4b2
JK		 4067 destroy_dirty_segmap(sbi);
4068 destroy_curseg(sbi);
4069 destroy_free_segmap(sbi);
4070 destroy_sit_info(sbi);
4071 sbi->sm_info = NULL;
4072 kfree(sm_info);
4073}
7fd9e544 4074
4d57b86d 4075int __init f2fs_create_segment_manager_caches(void)
7fd9e544
JK		 4076{
4077 discard_entry_slab = f2fs_kmem_cache_create("discard_entry",
e8512d2e 4078 sizeof(struct discard_entry));
7fd9e544 4079 if (!discard_entry_slab)
184a5cd2
CY		 4080 goto fail;
4081
b01a9201
JK		 4082 discard_cmd_slab = f2fs_kmem_cache_create("discard_cmd",
4083 sizeof(struct discard_cmd));
4084 if (!discard_cmd_slab)
6ab2a308 4085 goto destroy_discard_entry;
275b66b0 4086
184a5cd2 4087 sit_entry_set_slab = f2fs_kmem_cache_create("sit_entry_set",
c9ee0085 4088 sizeof(struct sit_entry_set));
184a5cd2 4089 if (!sit_entry_set_slab)
b01a9201 4090 goto destroy_discard_cmd;
88b88a66
JK		 4091
4092 inmem_entry_slab = f2fs_kmem_cache_create("inmem_page_entry",
4093 sizeof(struct inmem_pages));
4094 if (!inmem_entry_slab)
4095 goto destroy_sit_entry_set;
7fd9e544 4096 return 0;
184a5cd2 4097
88b88a66
JK		 4098destroy_sit_entry_set:
4099 kmem_cache_destroy(sit_entry_set_slab);
b01a9201
JK		 4100destroy_discard_cmd:
4101 kmem_cache_destroy(discard_cmd_slab);
6ab2a308 4102destroy_discard_entry:
184a5cd2
CY		 4103 kmem_cache_destroy(discard_entry_slab);
4104fail:
4105 return -ENOMEM;
7fd9e544
JK		 4106}
4107
4d57b86d 4108void f2fs_destroy_segment_manager_caches(void)
7fd9e544 4109{
184a5cd2 4110 kmem_cache_destroy(sit_entry_set_slab);
b01a9201 4111 kmem_cache_destroy(discard_cmd_slab);
7fd9e544 4112 kmem_cache_destroy(discard_entry_slab);
88b88a66 4113 kmem_cache_destroy(inmem_entry_slab);
7fd9e544 4114}
Linux 6.x block layer and io_uring tree(s)