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Merge tag 'libnvdimm-fixes-6.2' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux-block.git] / fs / f2fs / segment.c
CommitLineData
7c1a000d 1// SPDX-License-Identifier: GPL-2.0
0a8165d7 2/*
351df4b2
JK		 3 * fs/f2fs/segment.c
4 *
5 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
6 * http://www.samsung.com/
351df4b2
JK		 7 */
8#include <linux/fs.h>
9#include <linux/f2fs_fs.h>
10#include <linux/bio.h>
11#include <linux/blkdev.h>
4034247a 12#include <linux/sched/mm.h>
690e4a3e 13#include <linux/prefetch.h>
6b4afdd7 14#include <linux/kthread.h>
74de593a 15#include <linux/swap.h>
60b99b48 16#include <linux/timer.h>
1d7be270 17#include <linux/freezer.h>
1eb1ef4a 18#include <linux/sched/signal.h>
6691d940 19#include <linux/random.h>
351df4b2
JK		 20
21#include "f2fs.h"
22#include "segment.h"
23#include "node.h"
5f656541 24#include "gc.h"
52118743 25#include "iostat.h"
6ec178da 26#include <trace/events/f2fs.h>
351df4b2 27
9a7f143a
CL		 28#define __reverse_ffz(x) __reverse_ffs(~(x))
29
7fd9e544 30static struct kmem_cache *discard_entry_slab;
b01a9201 31static struct kmem_cache *discard_cmd_slab;
184a5cd2 32static struct kmem_cache *sit_entry_set_slab;
3db1de0e 33static struct kmem_cache *revoke_entry_slab;
7fd9e544 34
f96999c3
JK		 35static unsigned long __reverse_ulong(unsigned char *str)
36{
37 unsigned long tmp = 0;
38 int shift = 24, idx = 0;
39
40#if BITS_PER_LONG == 64
41 shift = 56;
42#endif
43 while (shift >= 0) {
44 tmp |= (unsigned long)str[idx++] << shift;
45 shift -= BITS_PER_BYTE;
46 }
47 return tmp;
48}
49
9a7f143a
CL		 50/*
51 * __reverse_ffs is copied from include/asm-generic/bitops/__ffs.h since
52 * MSB and LSB are reversed in a byte by f2fs_set_bit.
53 */
54static inline unsigned long __reverse_ffs(unsigned long word)
55{
56 int num = 0;
57
58#if BITS_PER_LONG == 64
f96999c3 59 if ((word & 0xffffffff00000000UL) == 0)
9a7f143a 60 num += 32;
f96999c3 61 else
9a7f143a 62 word >>= 32;
9a7f143a 63#endif
f96999c3 64 if ((word & 0xffff0000) == 0)
9a7f143a 65 num += 16;
f96999c3 66 else
9a7f143a 67 word >>= 16;
f96999c3
JK		 68
69 if ((word & 0xff00) == 0)
9a7f143a 70 num += 8;
f96999c3 71 else
9a7f143a 72 word >>= 8;
f96999c3 73
9a7f143a
CL		 74 if ((word & 0xf0) == 0)
75 num += 4;
76 else
77 word >>= 4;
f96999c3 78
9a7f143a
CL		 79 if ((word & 0xc) == 0)
80 num += 2;
81 else
82 word >>= 2;
f96999c3 83
9a7f143a
CL		 84 if ((word & 0x2) == 0)
85 num += 1;
86 return num;
87}
88
89/*
e1c42045 90 * __find_rev_next(_zero)_bit is copied from lib/find_next_bit.c because
9a7f143a 91 * f2fs_set_bit makes MSB and LSB reversed in a byte.
692223d1 92 * @size must be integral times of unsigned long.
9a7f143a 93 * Example:
f96999c3
JK		 94 * MSB <--> LSB
95 * f2fs_set_bit(0, bitmap) => 1000 0000
96 * f2fs_set_bit(7, bitmap) => 0000 0001
9a7f143a
CL		 97 */
98static unsigned long __find_rev_next_bit(const unsigned long *addr,
99 unsigned long size, unsigned long offset)
100{
101 const unsigned long *p = addr + BIT_WORD(offset);
692223d1 102 unsigned long result = size;
9a7f143a 103 unsigned long tmp;
9a7f143a
CL		 104
105 if (offset >= size)
106 return size;
107
692223d1 108 size -= (offset & ~(BITS_PER_LONG - 1));
9a7f143a 109 offset %= BITS_PER_LONG;
f96999c3 110
692223d1
FL		 111 while (1) {
112 if (*p == 0)
113 goto pass;
9a7f143a 114
f96999c3 115 tmp = __reverse_ulong((unsigned char *)p);
692223d1
FL		 116
117 tmp &= ~0UL >> offset;
118 if (size < BITS_PER_LONG)
119 tmp &= (~0UL << (BITS_PER_LONG - size));
9a7f143a 120 if (tmp)
692223d1
FL		 121 goto found;
122pass:
123 if (size <= BITS_PER_LONG)
124 break;
9a7f143a 125 size -= BITS_PER_LONG;
692223d1 126 offset = 0;
f96999c3 127 p++;
9a7f143a 128 }
692223d1
FL		 129 return result;
130found:
131 return result - size + __reverse_ffs(tmp);
9a7f143a
CL		 132}
133
134static unsigned long __find_rev_next_zero_bit(const unsigned long *addr,
135 unsigned long size, unsigned long offset)
136{
137 const unsigned long *p = addr + BIT_WORD(offset);
80609448 138 unsigned long result = size;
9a7f143a 139 unsigned long tmp;
9a7f143a
CL		 140
141 if (offset >= size)
142 return size;
143
80609448 144 size -= (offset & ~(BITS_PER_LONG - 1));
9a7f143a 145 offset %= BITS_PER_LONG;
80609448
JK		 146
147 while (1) {
148 if (*p == ~0UL)
149 goto pass;
150
f96999c3 151 tmp = __reverse_ulong((unsigned char *)p);
80609448
JK		 152
153 if (offset)
154 tmp |= ~0UL << (BITS_PER_LONG - offset);
155 if (size < BITS_PER_LONG)
156 tmp |= ~0UL >> size;
f96999c3 157 if (tmp != ~0UL)
80609448
JK		 158 goto found;
159pass:
160 if (size <= BITS_PER_LONG)
161 break;
9a7f143a 162 size -= BITS_PER_LONG;
80609448 163 offset = 0;
f96999c3 164 p++;
9a7f143a 165 }
80609448
JK		 166 return result;
167found:
168 return result - size + __reverse_ffz(tmp);
9a7f143a
CL		 169}
170
4d57b86d 171bool f2fs_need_SSR(struct f2fs_sb_info *sbi)
b3a97a2a
JK		 172{
173 int node_secs = get_blocktype_secs(sbi, F2FS_DIRTY_NODES);
174 int dent_secs = get_blocktype_secs(sbi, F2FS_DIRTY_DENTS);
175 int imeta_secs = get_blocktype_secs(sbi, F2FS_DIRTY_IMETA);
176
b0332a0f 177 if (f2fs_lfs_mode(sbi))
b3a97a2a 178 return false;
0e5e8111 179 if (sbi->gc_mode == GC_URGENT_HIGH)
b3a97a2a 180 return true;
4354994f
DR		 181 if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
182 return true;
b3a97a2a
JK		 183
184 return free_sections(sbi) <= (node_secs + 2 * dent_secs + imeta_secs +
a2a12b67 185 SM_I(sbi)->min_ssr_sections + reserved_sections(sbi));
b3a97a2a
JK		 186}
187
3db1de0e 188void f2fs_abort_atomic_write(struct inode *inode, bool clean)
88b88a66 189{
3db1de0e 190 struct f2fs_inode_info *fi = F2FS_I(inode);
decd36b6 191
e53f8643
CY		 192 if (!f2fs_is_atomic_file(inode))
193 return;
8ce67cb0 194
e53f8643
CY		 195 clear_inode_flag(fi->cow_inode, FI_COW_FILE);
196 iput(fi->cow_inode);
197 fi->cow_inode = NULL;
198 release_atomic_write_cnt(inode);
4d8d45df 199 clear_inode_flag(inode, FI_ATOMIC_COMMITTED);
41e8f85a 200 clear_inode_flag(inode, FI_ATOMIC_REPLACE);
e53f8643 201 clear_inode_flag(inode, FI_ATOMIC_FILE);
b4dac120 202 stat_dec_atomic_inode(inode);
4d8d45df
DJ		 203
204 if (clean) {
205 truncate_inode_pages_final(inode->i_mapping);
206 f2fs_i_size_write(inode, fi->original_i_size);
207 }
88b88a66
JK		 208}
209
3db1de0e
DJ		 210static int __replace_atomic_write_block(struct inode *inode, pgoff_t index,
211 block_t new_addr, block_t *old_addr, bool recover)
29b96b54 212{
28bc106b 213 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
3db1de0e
DJ		 214 struct dnode_of_data dn;
215 struct node_info ni;
216 int err;
28bc106b 217
7f2b4e8e 218retry:
3db1de0e
DJ		 219 set_new_dnode(&dn, inode, NULL, NULL, 0);
220 err = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE_RA);
221 if (err) {
222 if (err == -ENOMEM) {
223 f2fs_io_schedule_timeout(DEFAULT_IO_TIMEOUT);
224 goto retry;
2baf0781 225 }
3db1de0e 226 return err;
29b96b54 227 }
29b96b54 228
3db1de0e
DJ		 229 err = f2fs_get_node_info(sbi, dn.nid, &ni, false);
230 if (err) {
231 f2fs_put_dnode(&dn);
232 return err;
57864ae5 233 }
57864ae5 234
3db1de0e
DJ		 235 if (recover) {
236 /* dn.data_blkaddr is always valid */
237 if (!__is_valid_data_blkaddr(new_addr)) {
238 if (new_addr == NULL_ADDR)
239 dec_valid_block_count(sbi, inode, 1);
240 f2fs_invalidate_blocks(sbi, dn.data_blkaddr);
241 f2fs_update_data_blkaddr(&dn, new_addr);
242 } else {
243 f2fs_replace_block(sbi, &dn, dn.data_blkaddr,
244 new_addr, ni.version, true, true);
2ef79ecb 245 }
3db1de0e
DJ		 246 } else {
247 blkcnt_t count = 1;
29b96b54 248
3db1de0e
DJ		 249 *old_addr = dn.data_blkaddr;
250 f2fs_truncate_data_blocks_range(&dn, 1);
251 dec_valid_block_count(sbi, F2FS_I(inode)->cow_inode, count);
252 inc_valid_block_count(sbi, inode, &count);
253 f2fs_replace_block(sbi, &dn, dn.data_blkaddr, new_addr,
254 ni.version, true, false);
255 }
be1ee45d 256
3db1de0e
DJ		 257 f2fs_put_dnode(&dn);
258 return 0;
29b96b54
CY		 259}
260
3db1de0e
DJ		 261static void __complete_revoke_list(struct inode *inode, struct list_head *head,
262 bool revoke)
8c242db9 263{
3db1de0e 264 struct revoke_entry *cur, *tmp;
41e8f85a 265 bool truncate = is_inode_flag_set(inode, FI_ATOMIC_REPLACE);
8c242db9 266
3db1de0e
DJ		 267 list_for_each_entry_safe(cur, tmp, head, list) {
268 if (revoke)
269 __replace_atomic_write_block(inode, cur->index,
270 cur->old_addr, NULL, true);
41e8f85a 271
3db1de0e
DJ		 272 list_del(&cur->list);
273 kmem_cache_free(revoke_entry_slab, cur);
8c242db9 274 }
41e8f85a
DJ		 275
276 if (!revoke && truncate)
78a99fe6 277 f2fs_do_truncate_blocks(inode, 0, false);
8c242db9
JK		 278}
279
3db1de0e 280static int __f2fs_commit_atomic_write(struct inode *inode)
88b88a66
JK		 281{
282 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
283 struct f2fs_inode_info *fi = F2FS_I(inode);
3db1de0e
DJ		 284 struct inode *cow_inode = fi->cow_inode;
285 struct revoke_entry *new;
cf52b27a 286 struct list_head revoke_list;
3db1de0e
DJ		 287 block_t blkaddr;
288 struct dnode_of_data dn;
289 pgoff_t len = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE);
290 pgoff_t off = 0, blen, index;
291 int ret = 0, i;
88b88a66 292
cf52b27a
CY		 293 INIT_LIST_HEAD(&revoke_list);
294
3db1de0e
DJ		 295 while (len) {
296 blen = min_t(pgoff_t, ADDRS_PER_BLOCK(cow_inode), len);
28bc106b 297
3db1de0e
DJ		 298 set_new_dnode(&dn, cow_inode, NULL, NULL, 0);
299 ret = f2fs_get_dnode_of_data(&dn, off, LOOKUP_NODE_RA);
300 if (ret && ret != -ENOENT) {
301 goto out;
302 } else if (ret == -ENOENT) {
303 ret = 0;
304 if (dn.max_level == 0)
305 goto out;
306 goto next;
307 }
28bc106b 308
3db1de0e
DJ		 309 blen = min((pgoff_t)ADDRS_PER_PAGE(dn.node_page, cow_inode),
310 len);
311 index = off;
312 for (i = 0; i < blen; i++, dn.ofs_in_node++, index++) {
313 blkaddr = f2fs_data_blkaddr(&dn);
8d64d365 314
3db1de0e
DJ		 315 if (!__is_valid_data_blkaddr(blkaddr)) {
316 continue;
317 } else if (!f2fs_is_valid_blkaddr(sbi, blkaddr,
318 DATA_GENERIC_ENHANCE)) {
319 f2fs_put_dnode(&dn);
320 ret = -EFSCORRUPTED;
95fa90c9
CY		 321 f2fs_handle_error(sbi,
322 ERROR_INVALID_BLKADDR);
3db1de0e 323 goto out;
70c640b1 324 }
29b96b54 325
3db1de0e
DJ		 326 new = f2fs_kmem_cache_alloc(revoke_entry_slab, GFP_NOFS,
327 true, NULL);
28bc106b 328
3db1de0e
DJ		 329 ret = __replace_atomic_write_block(inode, index, blkaddr,
330 &new->old_addr, false);
331 if (ret) {
332 f2fs_put_dnode(&dn);
333 kmem_cache_free(revoke_entry_slab, new);
334 goto out;
335 }
cf52b27a 336
3db1de0e
DJ		 337 f2fs_update_data_blkaddr(&dn, NULL_ADDR);
338 new->index = index;
339 list_add_tail(&new->list, &revoke_list);
340 }
341 f2fs_put_dnode(&dn);
342next:
343 off += blen;
344 len -= blen;
cf52b27a 345 }
28bc106b 346
3db1de0e 347out:
4d8d45df 348 if (ret) {
f8e2f32b 349 sbi->revoked_atomic_block += fi->atomic_write_cnt;
4d8d45df 350 } else {
f8e2f32b 351 sbi->committed_atomic_block += fi->atomic_write_cnt;
4d8d45df
DJ		 352 set_inode_flag(inode, FI_ATOMIC_COMMITTED);
353 }
f8e2f32b 354
3db1de0e
DJ		 355 __complete_revoke_list(inode, &revoke_list, ret ? true : false);
356
357 return ret;
29b96b54
CY		 358}
359
3db1de0e 360int f2fs_commit_atomic_write(struct inode *inode)
29b96b54
CY		 361{
362 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
363 struct f2fs_inode_info *fi = F2FS_I(inode);
28bc106b 364 int err;
29b96b54 365
3db1de0e
DJ		 366 err = filemap_write_and_wait_range(inode->i_mapping, 0, LLONG_MAX);
367 if (err)
368 return err;
29b96b54 369
e4544b63 370 f2fs_down_write(&fi->i_gc_rwsem[WRITE]);
6f8d4455 371 f2fs_lock_op(sbi);
88b88a66 372
3db1de0e 373 err = __f2fs_commit_atomic_write(inode);
5fe45743 374
29b96b54 375 f2fs_unlock_op(sbi);
e4544b63 376 f2fs_up_write(&fi->i_gc_rwsem[WRITE]);
6f8d4455 377
edb27dee 378 return err;
88b88a66
JK		 379}
380
0a8165d7 381/*
351df4b2
JK		 382 * This function balances dirty node and dentry pages.
383 * In addition, it controls garbage collection.
384 */
2c4db1a6 385void f2fs_balance_fs(struct f2fs_sb_info *sbi, bool need)
351df4b2 386{
55523519 387 if (time_to_inject(sbi, FAULT_CHECKPOINT)) {
c45d6002 388 f2fs_show_injection_info(sbi, FAULT_CHECKPOINT);
a9cfee0e 389 f2fs_stop_checkpoint(sbi, false, STOP_CP_REASON_FAULT_INJECT);
55523519 390 }
0f348028 391
e589c2c4 392 /* balance_fs_bg is able to be pending */
a7881893 393 if (need && excess_cached_nats(sbi))
7bcd0cfa 394 f2fs_balance_fs_bg(sbi, false);
e589c2c4 395
00e09c0b 396 if (!f2fs_is_checkpoint_ready(sbi))
4354994f
DR		 397 return;
398
351df4b2 399 /*
029cd28c
JK		 400 * We should do GC or end up with checkpoint, if there are so many dirty
401 * dir/node pages without enough free segments.
351df4b2 402 */
7f3037a5 403 if (has_not_enough_free_secs(sbi, 0, 0)) {
5911d2d1
CY		 404 if (test_opt(sbi, GC_MERGE) && sbi->gc_thread &&
405 sbi->gc_thread->f2fs_gc_task) {
406 DEFINE_WAIT(wait);
407
408 prepare_to_wait(&sbi->gc_thread->fggc_wq, &wait,
409 TASK_UNINTERRUPTIBLE);
410 wake_up(&sbi->gc_thread->gc_wait_queue_head);
411 io_schedule();
412 finish_wait(&sbi->gc_thread->fggc_wq, &wait);
413 } else {
d147ea4a
JK		 414 struct f2fs_gc_control gc_control = {
415 .victim_segno = NULL_SEGNO,
416 .init_gc_type = BG_GC,
417 .no_bg_gc = true,
418 .should_migrate_blocks = false,
c81d5bae
JK		 419 .err_gc_skipped = false,
420 .nr_free_secs = 1 };
e4544b63 421 f2fs_down_write(&sbi->gc_lock);
d147ea4a 422 f2fs_gc(sbi, &gc_control);
5911d2d1 423 }
351df4b2
JK		 424 }
425}
426
287b1406
CY		 427static inline bool excess_dirty_threshold(struct f2fs_sb_info *sbi)
428{
e4544b63 429 int factor = f2fs_rwsem_is_locked(&sbi->cp_rwsem) ? 3 : 2;
287b1406
CY		 430 unsigned int dents = get_pages(sbi, F2FS_DIRTY_DENTS);
431 unsigned int qdata = get_pages(sbi, F2FS_DIRTY_QDATA);
432 unsigned int nodes = get_pages(sbi, F2FS_DIRTY_NODES);
433 unsigned int meta = get_pages(sbi, F2FS_DIRTY_META);
434 unsigned int imeta = get_pages(sbi, F2FS_DIRTY_IMETA);
435 unsigned int threshold = sbi->blocks_per_seg * factor *
436 DEFAULT_DIRTY_THRESHOLD;
437 unsigned int global_threshold = threshold * 3 / 2;
438
439 if (dents >= threshold || qdata >= threshold ||
440 nodes >= threshold || meta >= threshold ||
441 imeta >= threshold)
442 return true;
443 return dents + qdata + nodes + meta + imeta > global_threshold;
444}
445
7bcd0cfa 446void f2fs_balance_fs_bg(struct f2fs_sb_info *sbi, bool from_bg)
4660f9c0 447{
64c74a7a
CY		 448 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
449 return;
450
1dcc336b 451 /* try to shrink extent cache when there is no enough memory */
12607c1b 452 if (!f2fs_available_free_memory(sbi, READ_EXTENT_CACHE))
e7547dac
JK		 453 f2fs_shrink_read_extent_tree(sbi,
454 READ_EXTENT_CACHE_SHRINK_NUMBER);
1dcc336b 455
71644dff
JK		 456 /* try to shrink age extent cache when there is no enough memory */
457 if (!f2fs_available_free_memory(sbi, AGE_EXTENT_CACHE))
458 f2fs_shrink_age_extent_tree(sbi,
459 AGE_EXTENT_CACHE_SHRINK_NUMBER);
1dcc336b 460
1b38dc8e 461 /* check the # of cached NAT entries */
4d57b86d
CY		 462 if (!f2fs_available_free_memory(sbi, NAT_ENTRIES))
463 f2fs_try_to_free_nats(sbi, NAT_ENTRY_PER_BLOCK);
1b38dc8e 464
4d57b86d
CY		 465 if (!f2fs_available_free_memory(sbi, FREE_NIDS))
466 f2fs_try_to_free_nids(sbi, MAX_FREE_NIDS);
ad4edb83 467 else
4d57b86d 468 f2fs_build_free_nids(sbi, false, false);
31696580 469
287b1406
CY		 470 if (excess_dirty_nats(sbi) || excess_dirty_threshold(sbi) ||
471 excess_prefree_segs(sbi) || !f2fs_space_for_roll_forward(sbi))
493720a4
CY		 472 goto do_sync;
473
474 /* there is background inflight IO or foreground operation recently */
475 if (is_inflight_io(sbi, REQ_TIME) ||
e4544b63 476 (!f2fs_time_over(sbi, REQ_TIME) && f2fs_rwsem_is_locked(&sbi->cp_rwsem)))
f455c8a5 477 return;
31696580 478
493720a4
CY		 479 /* exceed periodical checkpoint timeout threshold */
480 if (f2fs_time_over(sbi, CP_TIME))
481 goto do_sync;
482
1b38dc8e 483 /* checkpoint is the only way to shrink partial cached entries */
cd6d697a 484 if (f2fs_available_free_memory(sbi, NAT_ENTRIES) &&
493720a4
CY		 485 f2fs_available_free_memory(sbi, INO_ENTRIES))
486 return;
487
488do_sync:
489 if (test_opt(sbi, DATA_FLUSH) && from_bg) {
490 struct blk_plug plug;
491
492 mutex_lock(&sbi->flush_lock);
493
494 blk_start_plug(&plug);
d80afefb 495 f2fs_sync_dirty_inodes(sbi, FILE_INODE, false);
493720a4
CY		 496 blk_finish_plug(&plug);
497
498 mutex_unlock(&sbi->flush_lock);
36b35a0d 499 }
ddd3b16c 500 f2fs_sync_fs(sbi->sb, 1);
493720a4 501 stat_inc_bg_cp_count(sbi->stat_info);
4660f9c0
JK		 502}
503
20fda56b
KM		 504static int __submit_flush_wait(struct f2fs_sb_info *sbi,
505 struct block_device *bdev)
3c62be17 506{
25ac8426 507 int ret = blkdev_issue_flush(bdev);
20fda56b
KM		 508
509 trace_f2fs_issue_flush(bdev, test_opt(sbi, NOBARRIER),
510 test_opt(sbi, FLUSH_MERGE), ret);
3c62be17
JK		 511 return ret;
512}
513
39d787be 514static int submit_flush_wait(struct f2fs_sb_info *sbi, nid_t ino)
3c62be17 515{
39d787be 516 int ret = 0;
3c62be17
JK		 517 int i;
518
0916878d 519 if (!f2fs_is_multi_device(sbi))
39d787be 520 return __submit_flush_wait(sbi, sbi->sb->s_bdev);
20fda56b 521
39d787be 522 for (i = 0; i < sbi->s_ndevs; i++) {
4d57b86d 523 if (!f2fs_is_dirty_device(sbi, ino, i, FLUSH_INO))
39d787be 524 continue;
20fda56b
KM		 525 ret = __submit_flush_wait(sbi, FDEV(i).bdev);
526 if (ret)
527 break;
3c62be17
JK		 528 }
529 return ret;
530}
531
2163d198 532static int issue_flush_thread(void *data)
6b4afdd7
JK		 533{
534 struct f2fs_sb_info *sbi = data;
b01a9201 535 struct flush_cmd_control *fcc = SM_I(sbi)->fcc_info;
a688b9d9 536 wait_queue_head_t *q = &fcc->flush_wait_queue;
6b4afdd7
JK		 537repeat:
538 if (kthread_should_stop())
539 return 0;
540
721bd4d5 541 if (!llist_empty(&fcc->issue_list)) {
6b4afdd7
JK		 542 struct flush_cmd *cmd, *next;
543 int ret;
544
721bd4d5
GZ		 545 fcc->dispatch_list = llist_del_all(&fcc->issue_list);
546 fcc->dispatch_list = llist_reverse_order(fcc->dispatch_list);
547
39d787be
CY		 548 cmd = llist_entry(fcc->dispatch_list, struct flush_cmd, llnode);
549
550 ret = submit_flush_wait(sbi, cmd->ino);
8b8dd65f
CY		 551 atomic_inc(&fcc->issued_flush);
552
721bd4d5
GZ		 553 llist_for_each_entry_safe(cmd, next,
554 fcc->dispatch_list, llnode) {
6b4afdd7 555 cmd->ret = ret;
6b4afdd7
JK		 556 complete(&cmd->wait);
557 }
a688b9d9 558 fcc->dispatch_list = NULL;
6b4afdd7
JK		 559 }
560
a688b9d9 561 wait_event_interruptible(*q,
721bd4d5 562 kthread_should_stop() || !llist_empty(&fcc->issue_list));
6b4afdd7
JK		 563 goto repeat;
564}
565
39d787be 566int f2fs_issue_flush(struct f2fs_sb_info *sbi, nid_t ino)
6b4afdd7 567{
b01a9201 568 struct flush_cmd_control *fcc = SM_I(sbi)->fcc_info;
adf8d90b 569 struct flush_cmd cmd;
8b8dd65f 570 int ret;
6b4afdd7 571
0f7b2abd
JK		 572 if (test_opt(sbi, NOBARRIER))
573 return 0;
574
8b8dd65f 575 if (!test_opt(sbi, FLUSH_MERGE)) {
72691af6 576 atomic_inc(&fcc->queued_flush);
39d787be 577 ret = submit_flush_wait(sbi, ino);
72691af6 578 atomic_dec(&fcc->queued_flush);
8b8dd65f
CY		 579 atomic_inc(&fcc->issued_flush);
580 return ret;
581 }
740432f8 582
0916878d
DLM		 583 if (atomic_inc_return(&fcc->queued_flush) == 1 ||
584 f2fs_is_multi_device(sbi)) {
39d787be 585 ret = submit_flush_wait(sbi, ino);
72691af6 586 atomic_dec(&fcc->queued_flush);
8b8dd65f
CY		 587
588 atomic_inc(&fcc->issued_flush);
740432f8
JK		 589 return ret;
590 }
6b4afdd7 591
39d787be 592 cmd.ino = ino;
adf8d90b 593 init_completion(&cmd.wait);
6b4afdd7 594
721bd4d5 595 llist_add(&cmd.llnode, &fcc->issue_list);
6b4afdd7 596
3b42c741
CY		 597 /*
598 * update issue_list before we wake up issue_flush thread, this
599 * smp_mb() pairs with another barrier in ___wait_event(), see
600 * more details in comments of waitqueue_active().
601 */
6f890df0
CY		 602 smp_mb();
603
604 if (waitqueue_active(&fcc->flush_wait_queue))
a688b9d9 605 wake_up(&fcc->flush_wait_queue);
6b4afdd7 606
5eba8c5d
JK		 607 if (fcc->f2fs_issue_flush) {
608 wait_for_completion(&cmd.wait);
72691af6 609 atomic_dec(&fcc->queued_flush);
5eba8c5d 610 } else {
d3238691
CY		 611 struct llist_node *list;
612
613 list = llist_del_all(&fcc->issue_list);
614 if (!list) {
615 wait_for_completion(&cmd.wait);
72691af6 616 atomic_dec(&fcc->queued_flush);
d3238691
CY		 617 } else {
618 struct flush_cmd *tmp, *next;
619
39d787be 620 ret = submit_flush_wait(sbi, ino);
d3238691
CY		 621
622 llist_for_each_entry_safe(tmp, next, list, llnode) {
623 if (tmp == &cmd) {
624 cmd.ret = ret;
72691af6 625 atomic_dec(&fcc->queued_flush);
d3238691
CY		 626 continue;
627 }
628 tmp->ret = ret;
629 complete(&tmp->wait);
630 }
631 }
5eba8c5d 632 }
adf8d90b
CY		 633
634 return cmd.ret;
6b4afdd7
JK		 635}
636
4d57b86d 637int f2fs_create_flush_cmd_control(struct f2fs_sb_info *sbi)
2163d198
GZ		 638{
639 dev_t dev = sbi->sb->s_bdev->bd_dev;
640 struct flush_cmd_control *fcc;
2163d198 641
b01a9201
JK		 642 if (SM_I(sbi)->fcc_info) {
643 fcc = SM_I(sbi)->fcc_info;
d871cd04 644 if (fcc->f2fs_issue_flush)
44b9d01f 645 return 0;
5eba8c5d
JK		 646 goto init_thread;
647 }
648
acbf054d 649 fcc = f2fs_kzalloc(sbi, sizeof(struct flush_cmd_control), GFP_KERNEL);
2163d198
GZ		 650 if (!fcc)
651 return -ENOMEM;
8b8dd65f 652 atomic_set(&fcc->issued_flush, 0);
72691af6 653 atomic_set(&fcc->queued_flush, 0);
2163d198 654 init_waitqueue_head(&fcc->flush_wait_queue);
721bd4d5 655 init_llist_head(&fcc->issue_list);
b01a9201 656 SM_I(sbi)->fcc_info = fcc;
d4fdf8ba 657 if (!test_opt(sbi, FLUSH_MERGE))
44b9d01f 658 return 0;
d4fdf8ba 659
5eba8c5d 660init_thread:
2163d198
GZ		 661 fcc->f2fs_issue_flush = kthread_run(issue_flush_thread, sbi,
662 "f2fs_flush-%u:%u", MAJOR(dev), MINOR(dev));
663 if (IS_ERR(fcc->f2fs_issue_flush)) {
146dbcbf
YL		 664 int err = PTR_ERR(fcc->f2fs_issue_flush);
665
b3d83066 666 fcc->f2fs_issue_flush = NULL;
2163d198
GZ		 667 return err;
668 }
2163d198 669
44b9d01f 670 return 0;
2163d198
GZ		 671}
672
4d57b86d 673void f2fs_destroy_flush_cmd_control(struct f2fs_sb_info *sbi, bool free)
2163d198 674{
b01a9201 675 struct flush_cmd_control *fcc = SM_I(sbi)->fcc_info;
2163d198 676
5eba8c5d
JK		 677 if (fcc && fcc->f2fs_issue_flush) {
678 struct task_struct *flush_thread = fcc->f2fs_issue_flush;
679
680 fcc->f2fs_issue_flush = NULL;
681 kthread_stop(flush_thread);
682 }
683 if (free) {
c8eb7024 684 kfree(fcc);
b01a9201 685 SM_I(sbi)->fcc_info = NULL;
5eba8c5d 686 }
2163d198
GZ		 687}
688
1228b482
CY		 689int f2fs_flush_device_cache(struct f2fs_sb_info *sbi)
690{
691 int ret = 0, i;
692
0916878d 693 if (!f2fs_is_multi_device(sbi))
1228b482
CY		 694 return 0;
695
6ed29fe1
CY		 696 if (test_opt(sbi, NOBARRIER))
697 return 0;
698
1228b482 699 for (i = 1; i < sbi->s_ndevs; i++) {
91803392
CY		 700 int count = DEFAULT_RETRY_IO_COUNT;
701
1228b482
CY		 702 if (!f2fs_test_bit(i, (char *)&sbi->dirty_device))
703 continue;
91803392
CY		 704
705 do {
706 ret = __submit_flush_wait(sbi, FDEV(i).bdev);
707 if (ret)
a64239d0 708 f2fs_io_schedule_timeout(DEFAULT_IO_TIMEOUT);
91803392
CY		 709 } while (ret && --count);
710
711 if (ret) {
a9cfee0e
CY		 712 f2fs_stop_checkpoint(sbi, false,
713 STOP_CP_REASON_FLUSH_FAIL);
1228b482 714 break;
91803392 715 }
1228b482
CY		 716
717 spin_lock(&sbi->dev_lock);
718 f2fs_clear_bit(i, (char *)&sbi->dirty_device);
719 spin_unlock(&sbi->dev_lock);
720 }
721
722 return ret;
723}
724
351df4b2
JK		 725static void __locate_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno,
726 enum dirty_type dirty_type)
727{
728 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
729
730 /* need not be added */
731 if (IS_CURSEG(sbi, segno))
732 return;
733
734 if (!test_and_set_bit(segno, dirty_i->dirty_segmap[dirty_type]))
735 dirty_i->nr_dirty[dirty_type]++;
736
737 if (dirty_type == DIRTY) {
738 struct seg_entry *sentry = get_seg_entry(sbi, segno);
4625d6aa 739 enum dirty_type t = sentry->type;
b2f2c390 740
ec325b52
JK		 741 if (unlikely(t >= DIRTY)) {
742 f2fs_bug_on(sbi, 1);
743 return;
744 }
4625d6aa
CL		 745 if (!test_and_set_bit(segno, dirty_i->dirty_segmap[t]))
746 dirty_i->nr_dirty[t]++;
da52f8ad
JQ		 747
748 if (__is_large_section(sbi)) {
749 unsigned int secno = GET_SEC_FROM_SEG(sbi, segno);
123aaf77 750 block_t valid_blocks =
da52f8ad
JQ		 751 get_valid_blocks(sbi, segno, true);
752
753 f2fs_bug_on(sbi, unlikely(!valid_blocks ||
074b5ea2 754 valid_blocks == CAP_BLKS_PER_SEC(sbi)));
da52f8ad
JQ		 755
756 if (!IS_CURSEC(sbi, secno))
757 set_bit(secno, dirty_i->dirty_secmap);
758 }
351df4b2
JK		 759 }
760}
761
762static void __remove_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno,
763 enum dirty_type dirty_type)
764{
765 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
123aaf77 766 block_t valid_blocks;
351df4b2
JK		 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
da52f8ad
JQ		 778 valid_blocks = get_valid_blocks(sbi, segno, true);
779 if (valid_blocks == 0) {
4ddb1a4d 780 clear_bit(GET_SEC_FROM_SEG(sbi, segno),
5ec4e49f 781 dirty_i->victim_secmap);
bbf9f7d9
ST		 782#ifdef CONFIG_F2FS_CHECK_FS
783 clear_bit(segno, SIT_I(sbi)->invalid_segmap);
784#endif
785 }
da52f8ad
JQ		 786 if (__is_large_section(sbi)) {
787 unsigned int secno = GET_SEC_FROM_SEG(sbi, segno);
788
789 if (!valid_blocks ||
074b5ea2 790 valid_blocks == CAP_BLKS_PER_SEC(sbi)) {
da52f8ad
JQ		 791 clear_bit(secno, dirty_i->dirty_secmap);
792 return;
793 }
794
795 if (!IS_CURSEC(sbi, secno))
796 set_bit(secno, dirty_i->dirty_secmap);
797 }
351df4b2
JK		 798 }
799}
800
0a8165d7 801/*
351df4b2
JK		 802 * Should not occur error such as -ENOMEM.
803 * Adding dirty entry into seglist is not critical operation.
804 * If a given segment is one of current working segments, it won't be added.
805 */
8d8451af 806static void locate_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno)
351df4b2
JK		 807{
808 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
4354994f 809 unsigned short valid_blocks, ckpt_valid_blocks;
de881df9 810 unsigned int usable_blocks;
351df4b2
JK		 811
812 if (segno == NULL_SEGNO || IS_CURSEG(sbi, segno))
813 return;
814
de881df9 815 usable_blocks = f2fs_usable_blks_in_seg(sbi, segno);
351df4b2
JK		 816 mutex_lock(&dirty_i->seglist_lock);
817
302bd348 818 valid_blocks = get_valid_blocks(sbi, segno, false);
61461fc9 819 ckpt_valid_blocks = get_ckpt_valid_blocks(sbi, segno, false);
351df4b2 820
4354994f 821 if (valid_blocks == 0 && (!is_sbi_flag_set(sbi, SBI_CP_DISABLED) ||
de881df9 822 ckpt_valid_blocks == usable_blocks)) {
351df4b2
JK		 823 __locate_dirty_segment(sbi, segno, PRE);
824 __remove_dirty_segment(sbi, segno, DIRTY);
de881df9 825 } else if (valid_blocks < usable_blocks) {
351df4b2
JK		 826 __locate_dirty_segment(sbi, segno, DIRTY);
827 } else {
828 /* Recovery routine with SSR needs this */
829 __remove_dirty_segment(sbi, segno, DIRTY);
830 }
831
832 mutex_unlock(&dirty_i->seglist_lock);
351df4b2
JK		 833}
834
4354994f
DR		 835/* This moves currently empty dirty blocks to prefree. Must hold seglist_lock */
836void f2fs_dirty_to_prefree(struct f2fs_sb_info *sbi)
837{
838 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
839 unsigned int segno;
840
841 mutex_lock(&dirty_i->seglist_lock);
842 for_each_set_bit(segno, dirty_i->dirty_segmap[DIRTY], MAIN_SEGS(sbi)) {
843 if (get_valid_blocks(sbi, segno, false))
844 continue;
845 if (IS_CURSEG(sbi, segno))
846 continue;
847 __locate_dirty_segment(sbi, segno, PRE);
848 __remove_dirty_segment(sbi, segno, DIRTY);
849 }
850 mutex_unlock(&dirty_i->seglist_lock);
851}
852
4d3aed70 853block_t f2fs_get_unusable_blocks(struct f2fs_sb_info *sbi)
4354994f 854{
ae4ad7ea
DR		 855 int ovp_hole_segs =
856 (overprovision_segments(sbi) - reserved_segments(sbi));
857 block_t ovp_holes = ovp_hole_segs << sbi->log_blocks_per_seg;
4d3aed70 858 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
4354994f 859 block_t holes[2] = {0, 0}; /* DATA and NODE */
4d3aed70 860 block_t unusable;
4354994f
DR		 861 struct seg_entry *se;
862 unsigned int segno;
863
864 mutex_lock(&dirty_i->seglist_lock);
865 for_each_set_bit(segno, dirty_i->dirty_segmap[DIRTY], MAIN_SEGS(sbi)) {
866 se = get_seg_entry(sbi, segno);
867 if (IS_NODESEG(se->type))
de881df9
AR		 868 holes[NODE] += f2fs_usable_blks_in_seg(sbi, segno) -
869 se->valid_blocks;
4354994f 870 else
de881df9
AR		 871 holes[DATA] += f2fs_usable_blks_in_seg(sbi, segno) -
872 se->valid_blocks;
4354994f
DR		 873 }
874 mutex_unlock(&dirty_i->seglist_lock);
875
3b21b794 876 unusable = max(holes[DATA], holes[NODE]);
4d3aed70
DR		 877 if (unusable > ovp_holes)
878 return unusable - ovp_holes;
879 return 0;
880}
881
882int f2fs_disable_cp_again(struct f2fs_sb_info *sbi, block_t unusable)
883{
884 int ovp_hole_segs =
885 (overprovision_segments(sbi) - reserved_segments(sbi));
886 if (unusable > F2FS_OPTION(sbi).unusable_cap)
4354994f 887 return -EAGAIN;
db610a64 888 if (is_sbi_flag_set(sbi, SBI_CP_DISABLED_QUICK) &&
ae4ad7ea 889 dirty_segments(sbi) > ovp_hole_segs)
db610a64 890 return -EAGAIN;
4354994f
DR		 891 return 0;
892}
893
894/* This is only used by SBI_CP_DISABLED */
895static unsigned int get_free_segment(struct f2fs_sb_info *sbi)
896{
897 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
898 unsigned int segno = 0;
899
900 mutex_lock(&dirty_i->seglist_lock);
901 for_each_set_bit(segno, dirty_i->dirty_segmap[DIRTY], MAIN_SEGS(sbi)) {
902 if (get_valid_blocks(sbi, segno, false))
903 continue;
61461fc9 904 if (get_ckpt_valid_blocks(sbi, segno, false))
4354994f
DR		 905 continue;
906 mutex_unlock(&dirty_i->seglist_lock);
907 return segno;
908 }
909 mutex_unlock(&dirty_i->seglist_lock);
910 return NULL_SEGNO;
911}
912
004b6862 913static struct discard_cmd *__create_discard_cmd(struct f2fs_sb_info *sbi,
c81abe34
JK		 914 struct block_device *bdev, block_t lstart,
915 block_t start, block_t len)
275b66b0 916{
0b54fb84 917 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
ba48a33e 918 struct list_head *pend_list;
b01a9201 919 struct discard_cmd *dc;
275b66b0 920
ba48a33e
CY		 921 f2fs_bug_on(sbi, !len);
922
923 pend_list = &dcc->pend_list[plist_idx(len)];
924
32410577 925 dc = f2fs_kmem_cache_alloc(discard_cmd_slab, GFP_NOFS, true, NULL);
b01a9201 926 INIT_LIST_HEAD(&dc->list);
c81abe34 927 dc->bdev = bdev;
b01a9201 928 dc->lstart = lstart;
c81abe34 929 dc->start = start;
b01a9201 930 dc->len = len;
ec9895ad 931 dc->ref = 0;
15469963 932 dc->state = D_PREP;
72691af6 933 dc->queued = 0;
c81abe34 934 dc->error = 0;
b01a9201 935 init_completion(&dc->wait);
22d375dd 936 list_add_tail(&dc->list, pend_list);
35ec7d57
CY		 937 spin_lock_init(&dc->lock);
938 dc->bio_ref = 0;
5f32366a 939 atomic_inc(&dcc->discard_cmd_cnt);
d84d1cbd 940 dcc->undiscard_blks += len;
004b6862
CY		 941
942 return dc;
943}
944
945static struct discard_cmd *__attach_discard_cmd(struct f2fs_sb_info *sbi,
946 struct block_device *bdev, block_t lstart,
947 block_t start, block_t len,
4dada3fd
CY		 948 struct rb_node *parent, struct rb_node **p,
949 bool leftmost)
004b6862
CY		 950{
951 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
952 struct discard_cmd *dc;
953
954 dc = __create_discard_cmd(sbi, bdev, lstart, start, len);
955
956 rb_link_node(&dc->rb_node, parent, p);
4dada3fd 957 rb_insert_color_cached(&dc->rb_node, &dcc->root, leftmost);
004b6862
CY		 958
959 return dc;
15469963
JK		 960}
961
004b6862
CY		 962static void __detach_discard_cmd(struct discard_cmd_control *dcc,
963 struct discard_cmd *dc)
15469963 964{
dcc9165d 965 if (dc->state == D_DONE)
72691af6 966 atomic_sub(dc->queued, &dcc->queued_discard);
004b6862
CY		 967
968 list_del(&dc->list);
4dada3fd 969 rb_erase_cached(&dc->rb_node, &dcc->root);
d84d1cbd 970 dcc->undiscard_blks -= dc->len;
004b6862
CY		 971
972 kmem_cache_free(discard_cmd_slab, dc);
973
974 atomic_dec(&dcc->discard_cmd_cnt);
975}
976
977static void __remove_discard_cmd(struct f2fs_sb_info *sbi,
978 struct discard_cmd *dc)
979{
980 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
35ec7d57 981 unsigned long flags;
dcc9165d 982
2ec6f2ef
CY		 983 trace_f2fs_remove_discard(dc->bdev, dc->start, dc->len);
984
35ec7d57
CY		 985 spin_lock_irqsave(&dc->lock, flags);
986 if (dc->bio_ref) {
987 spin_unlock_irqrestore(&dc->lock, flags);
988 return;
989 }
990 spin_unlock_irqrestore(&dc->lock, flags);
991
d9703d90
CY		 992 f2fs_bug_on(sbi, dc->ref);
993
c81abe34
JK		 994 if (dc->error == -EOPNOTSUPP)
995 dc->error = 0;
15469963 996
c81abe34 997 if (dc->error)
22d7ea13 998 printk_ratelimited(
c45d6002
CY		 999 "%sF2FS-fs (%s): Issue discard(%u, %u, %u) failed, ret: %d",
1000 KERN_INFO, sbi->sb->s_id,
1001 dc->lstart, dc->start, dc->len, dc->error);
004b6862 1002 __detach_discard_cmd(dcc, dc);
275b66b0
CY		 1003}
1004
c81abe34
JK		 1005static void f2fs_submit_discard_endio(struct bio *bio)
1006{
1007 struct discard_cmd *dc = (struct discard_cmd *)bio->bi_private;
35ec7d57 1008 unsigned long flags;
c81abe34 1009
35ec7d57 1010 spin_lock_irqsave(&dc->lock, flags);
3fa6a8c5
ST		 1011 if (!dc->error)
1012 dc->error = blk_status_to_errno(bio->bi_status);
35ec7d57
CY		 1013 dc->bio_ref--;
1014 if (!dc->bio_ref && dc->state == D_SUBMIT) {
1015 dc->state = D_DONE;
1016 complete_all(&dc->wait);
1017 }
1018 spin_unlock_irqrestore(&dc->lock, flags);
c81abe34
JK		 1019 bio_put(bio);
1020}
1021
94b1e10e 1022static void __check_sit_bitmap(struct f2fs_sb_info *sbi,
6915ea9d
CY		 1023 block_t start, block_t end)
1024{
1025#ifdef CONFIG_F2FS_CHECK_FS
1026 struct seg_entry *sentry;
1027 unsigned int segno;
1028 block_t blk = start;
1029 unsigned long offset, size, max_blocks = sbi->blocks_per_seg;
1030 unsigned long *map;
1031
1032 while (blk < end) {
1033 segno = GET_SEGNO(sbi, blk);
1034 sentry = get_seg_entry(sbi, segno);
1035 offset = GET_BLKOFF_FROM_SEG0(sbi, blk);
1036
008396e1
YS		 1037 if (end < START_BLOCK(sbi, segno + 1))
1038 size = GET_BLKOFF_FROM_SEG0(sbi, end);
1039 else
1040 size = max_blocks;
6915ea9d
CY		 1041 map = (unsigned long *)(sentry->cur_valid_map);
1042 offset = __find_rev_next_bit(map, size, offset);
1043 f2fs_bug_on(sbi, offset != size);
008396e1 1044 blk = START_BLOCK(sbi, segno + 1);
6915ea9d
CY		 1045 }
1046#endif
1047}
1048
8bb4f253
JK		 1049static void __init_discard_policy(struct f2fs_sb_info *sbi,
1050 struct discard_policy *dpolicy,
1051 int discard_type, unsigned int granularity)
1052{
c35b8d5e
ST		 1053 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
1054
8bb4f253
JK		 1055 /* common policy */
1056 dpolicy->type = discard_type;
1057 dpolicy->sync = true;
20ee4382 1058 dpolicy->ordered = false;
8bb4f253
JK		 1059 dpolicy->granularity = granularity;
1060
d2d8e896 1061 dpolicy->max_requests = dcc->max_discard_request;
8bb4f253 1062 dpolicy->io_aware_gran = MAX_PLIST_NUM;
6ce48b0c 1063 dpolicy->timeout = false;
8bb4f253
JK		 1064
1065 if (discard_type == DPOLICY_BG) {
d2d8e896
KV		 1066 dpolicy->min_interval = dcc->min_discard_issue_time;
1067 dpolicy->mid_interval = dcc->mid_discard_issue_time;
1068 dpolicy->max_interval = dcc->max_discard_issue_time;
8bb4f253 1069 dpolicy->io_aware = true;
cba60849 1070 dpolicy->sync = false;
20ee4382 1071 dpolicy->ordered = true;
8a47d228 1072 if (utilization(sbi) > dcc->discard_urgent_util) {
1cd2e6d5 1073 dpolicy->granularity = MIN_DISCARD_GRANULARITY;
c35b8d5e
ST		 1074 if (atomic_read(&dcc->discard_cmd_cnt))
1075 dpolicy->max_interval =
d2d8e896 1076 dcc->min_discard_issue_time;
8bb4f253
JK		 1077 }
1078 } else if (discard_type == DPOLICY_FORCE) {
d2d8e896
KV		 1079 dpolicy->min_interval = dcc->min_discard_issue_time;
1080 dpolicy->mid_interval = dcc->mid_discard_issue_time;
1081 dpolicy->max_interval = dcc->max_discard_issue_time;
8bb4f253
JK		 1082 dpolicy->io_aware = false;
1083 } else if (discard_type == DPOLICY_FSTRIM) {
1084 dpolicy->io_aware = false;
1085 } else if (discard_type == DPOLICY_UMOUNT) {
1086 dpolicy->io_aware = false;
b8623253 1087 /* we need to issue all to keep CP_TRIMMED_FLAG */
1cd2e6d5 1088 dpolicy->granularity = MIN_DISCARD_GRANULARITY;
6ce48b0c 1089 dpolicy->timeout = true;
8bb4f253
JK		 1090 }
1091}
1092
35ec7d57
CY		 1093static void __update_discard_tree_range(struct f2fs_sb_info *sbi,
1094 struct block_device *bdev, block_t lstart,
1095 block_t start, block_t len);
c81abe34 1096/* this function is copied from blkdev_issue_discard from block/blk-lib.c */
6b9cb124 1097static int __submit_discard_cmd(struct f2fs_sb_info *sbi,
78997b56 1098 struct discard_policy *dpolicy,
35ec7d57
CY		 1099 struct discard_cmd *dc,
1100 unsigned int *issued)
c81abe34 1101{
35ec7d57 1102 struct block_device *bdev = dc->bdev;
35ec7d57 1103 unsigned int max_discard_blocks =
cf0fbf89 1104 SECTOR_TO_BLOCK(bdev_max_discard_sectors(bdev));
c81abe34 1105 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
78997b56
CY		 1106 struct list_head *wait_list = (dpolicy->type == DPOLICY_FSTRIM) ?
1107 &(dcc->fstrim_list) : &(dcc->wait_list);
7649c873 1108 blk_opf_t flag = dpolicy->sync ? REQ_SYNC : 0;
35ec7d57
CY		 1109 block_t lstart, start, len, total_len;
1110 int err = 0;
c81abe34
JK		 1111
1112 if (dc->state != D_PREP)
6b9cb124 1113 return 0;
c81abe34 1114
d6184774 1115 if (is_sbi_flag_set(sbi, SBI_NEED_FSCK))
6b9cb124 1116 return 0;
d6184774 1117
35ec7d57
CY		 1118 trace_f2fs_issue_discard(bdev, dc->start, dc->len);
1119
1120 lstart = dc->lstart;
1121 start = dc->start;
1122 len = dc->len;
1123 total_len = len;
1124
1125 dc->len = 0;
1126
1127 while (total_len && *issued < dpolicy->max_requests && !err) {
1128 struct bio *bio = NULL;
1129 unsigned long flags;
1130 bool last = true;
1131
1132 if (len > max_discard_blocks) {
1133 len = max_discard_blocks;
1134 last = false;
1135 }
1136
1137 (*issued)++;
1138 if (*issued == dpolicy->max_requests)
1139 last = true;
1140
1141 dc->len += len;
1142
b83dcfe6 1143 if (time_to_inject(sbi, FAULT_DISCARD)) {
c45d6002 1144 f2fs_show_injection_info(sbi, FAULT_DISCARD);
b83dcfe6 1145 err = -EIO;
5b7b74b7
YL		 1146 } else {
1147 err = __blkdev_issue_discard(bdev,
35ec7d57
CY		 1148 SECTOR_FROM_BLOCK(start),
1149 SECTOR_FROM_BLOCK(len),
44abff2c 1150 GFP_NOFS, &bio);
5b7b74b7 1151 }
6b9cb124 1152 if (err) {
35ec7d57 1153 spin_lock_irqsave(&dc->lock, flags);
6b9cb124 1154 if (dc->state == D_PARTIAL)
35ec7d57 1155 dc->state = D_SUBMIT;
35ec7d57
CY		 1156 spin_unlock_irqrestore(&dc->lock, flags);
1157
6b9cb124
CY		 1158 break;
1159 }
35ec7d57 1160
6b9cb124 1161 f2fs_bug_on(sbi, !bio);
35ec7d57 1162
6b9cb124
CY		 1163 /*
1164 * should keep before submission to avoid D_DONE
1165 * right away
1166 */
1167 spin_lock_irqsave(&dc->lock, flags);
1168 if (last)
1169 dc->state = D_SUBMIT;
1170 else
1171 dc->state = D_PARTIAL;
1172 dc->bio_ref++;
1173 spin_unlock_irqrestore(&dc->lock, flags);
35ec7d57 1174
72691af6
JK		 1175 atomic_inc(&dcc->queued_discard);
1176 dc->queued++;
6b9cb124 1177 list_move_tail(&dc->list, wait_list);
b0af6d49 1178
6b9cb124 1179 /* sanity check on discard range */
9249dded 1180 __check_sit_bitmap(sbi, lstart, lstart + len);
35ec7d57 1181
6b9cb124
CY		 1182 bio->bi_private = dc;
1183 bio->bi_end_io = f2fs_submit_discard_endio;
1184 bio->bi_opf |= flag;
1185 submit_bio(bio);
1186
1187 atomic_inc(&dcc->issued_discard);
1188
15e38ee4 1189 f2fs_update_iostat(sbi, NULL, FS_DISCARD, len * F2FS_BLKSIZE);
35ec7d57
CY		 1190
1191 lstart += len;
1192 start += len;
1193 total_len -= len;
1194 len = total_len;
c81abe34 1195 }
35ec7d57 1196
df423399
ST		 1197 if (!err && len) {
1198 dcc->undiscard_blks -= len;
35ec7d57 1199 __update_discard_tree_range(sbi, bdev, lstart, start, len);
df423399 1200 }
6b9cb124 1201 return err;
c81abe34
JK		 1202}
1203
47d0d7d7 1204static void __insert_discard_tree(struct f2fs_sb_info *sbi,
004b6862
CY		 1205 struct block_device *bdev, block_t lstart,
1206 block_t start, block_t len,
1207 struct rb_node **insert_p,
1208 struct rb_node *insert_parent)
c81abe34 1209{
004b6862 1210 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
dca6951f 1211 struct rb_node **p;
004b6862 1212 struct rb_node *parent = NULL;
4dada3fd 1213 bool leftmost = true;
004b6862
CY		 1214
1215 if (insert_p && insert_parent) {
1216 parent = insert_parent;
1217 p = insert_p;
1218 goto do_insert;
1219 }
c81abe34 1220
4dada3fd
CY		 1221 p = f2fs_lookup_rb_tree_for_insert(sbi, &dcc->root, &parent,
1222 lstart, &leftmost);
004b6862 1223do_insert:
47d0d7d7 1224 __attach_discard_cmd(sbi, bdev, lstart, start, len, parent,
4dada3fd 1225 p, leftmost);
c81abe34
JK		 1226}
1227
ba48a33e
CY		 1228static void __relocate_discard_cmd(struct discard_cmd_control *dcc,
1229 struct discard_cmd *dc)
1230{
1231 list_move_tail(&dc->list, &dcc->pend_list[plist_idx(dc->len)]);
1232}
1233
3d6a650f
YH		 1234static void __punch_discard_cmd(struct f2fs_sb_info *sbi,
1235 struct discard_cmd *dc, block_t blkaddr)
1236{
ba48a33e 1237 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
004b6862
CY		 1238 struct discard_info di = dc->di;
1239 bool modified = false;
3d6a650f 1240
004b6862 1241 if (dc->state == D_DONE || dc->len == 1) {
3d6a650f
YH		 1242 __remove_discard_cmd(sbi, dc);
1243 return;
1244 }
1245
d84d1cbd
CY		 1246 dcc->undiscard_blks -= di.len;
1247
004b6862 1248 if (blkaddr > di.lstart) {
3d6a650f 1249 dc->len = blkaddr - dc->lstart;
d84d1cbd 1250 dcc->undiscard_blks += dc->len;
ba48a33e 1251 __relocate_discard_cmd(dcc, dc);
004b6862
CY		 1252 modified = true;
1253 }
1254
1255 if (blkaddr < di.lstart + di.len - 1) {
1256 if (modified) {
1257 __insert_discard_tree(sbi, dc->bdev, blkaddr + 1,
1258 di.start + blkaddr + 1 - di.lstart,
1259 di.lstart + di.len - 1 - blkaddr,
1260 NULL, NULL);
1261 } else {
1262 dc->lstart++;
1263 dc->len--;
1264 dc->start++;
d84d1cbd 1265 dcc->undiscard_blks += dc->len;
ba48a33e 1266 __relocate_discard_cmd(dcc, dc);
004b6862 1267 }
3d6a650f
YH		 1268 }
1269}
1270
004b6862
CY		 1271static void __update_discard_tree_range(struct f2fs_sb_info *sbi,
1272 struct block_device *bdev, block_t lstart,
1273 block_t start, block_t len)
275b66b0 1274{
0b54fb84 1275 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
004b6862
CY		 1276 struct discard_cmd *prev_dc = NULL, *next_dc = NULL;
1277 struct discard_cmd *dc;
1278 struct discard_info di = {0};
1279 struct rb_node **insert_p = NULL, *insert_parent = NULL;
35ec7d57 1280 unsigned int max_discard_blocks =
cf0fbf89 1281 SECTOR_TO_BLOCK(bdev_max_discard_sectors(bdev));
004b6862 1282 block_t end = lstart + len;
275b66b0 1283
4d57b86d 1284 dc = (struct discard_cmd *)f2fs_lookup_rb_tree_ret(&dcc->root,
004b6862
CY		 1285 NULL, lstart,
1286 (struct rb_entry **)&prev_dc,
1287 (struct rb_entry **)&next_dc,
4dada3fd 1288 &insert_p, &insert_parent, true, NULL);
004b6862
CY		 1289 if (dc)
1290 prev_dc = dc;
1291
1292 if (!prev_dc) {
1293 di.lstart = lstart;
1294 di.len = next_dc ? next_dc->lstart - lstart : len;
1295 di.len = min(di.len, len);
1296 di.start = start;
22d375dd 1297 }
15469963 1298
004b6862
CY		 1299 while (1) {
1300 struct rb_node *node;
1301 bool merged = false;
1302 struct discard_cmd *tdc = NULL;
1303
1304 if (prev_dc) {
1305 di.lstart = prev_dc->lstart + prev_dc->len;
1306 if (di.lstart < lstart)
1307 di.lstart = lstart;
1308 if (di.lstart >= end)
1309 break;
1310
1311 if (!next_dc || next_dc->lstart > end)
1312 di.len = end - di.lstart;
1313 else
1314 di.len = next_dc->lstart - di.lstart;
1315 di.start = start + di.lstart - lstart;
1316 }
1317
1318 if (!di.len)
1319 goto next;
1320
1321 if (prev_dc && prev_dc->state == D_PREP &&
1322 prev_dc->bdev == bdev &&
35ec7d57
CY		 1323 __is_discard_back_mergeable(&di, &prev_dc->di,
1324 max_discard_blocks)) {
004b6862 1325 prev_dc->di.len += di.len;
d84d1cbd 1326 dcc->undiscard_blks += di.len;
ba48a33e 1327 __relocate_discard_cmd(dcc, prev_dc);
004b6862
CY		 1328 di = prev_dc->di;
1329 tdc = prev_dc;
1330 merged = true;
1331 }
1332
1333 if (next_dc && next_dc->state == D_PREP &&
1334 next_dc->bdev == bdev &&
35ec7d57
CY		 1335 __is_discard_front_mergeable(&di, &next_dc->di,
1336 max_discard_blocks)) {
004b6862
CY		 1337 next_dc->di.lstart = di.lstart;
1338 next_dc->di.len += di.len;
1339 next_dc->di.start = di.start;
d84d1cbd 1340 dcc->undiscard_blks += di.len;
ba48a33e 1341 __relocate_discard_cmd(dcc, next_dc);
004b6862
CY		 1342 if (tdc)
1343 __remove_discard_cmd(sbi, tdc);
004b6862 1344 merged = true;
4e6a8d9b 1345 }
004b6862 1346
df0f6b44 1347 if (!merged) {
004b6862
CY		 1348 __insert_discard_tree(sbi, bdev, di.lstart, di.start,
1349 di.len, NULL, NULL);
df0f6b44 1350 }
004b6862
CY		 1351 next:
1352 prev_dc = next_dc;
1353 if (!prev_dc)
1354 break;
1355
1356 node = rb_next(&prev_dc->rb_node);
1357 next_dc = rb_entry_safe(node, struct discard_cmd, rb_node);
1358 }
004b6862
CY		 1359}
1360
62081639 1361static void __queue_discard_cmd(struct f2fs_sb_info *sbi,
004b6862
CY		 1362 struct block_device *bdev, block_t blkstart, block_t blklen)
1363{
1364 block_t lblkstart = blkstart;
1365
7f3d7719 1366 if (!f2fs_bdev_support_discard(bdev))
62081639 1367 return;
7f3d7719 1368
0243a5f9 1369 trace_f2fs_queue_discard(bdev, blkstart, blklen);
004b6862 1370
0916878d 1371 if (f2fs_is_multi_device(sbi)) {
004b6862
CY		 1372 int devi = f2fs_target_device_index(sbi, blkstart);
1373
1374 blkstart -= FDEV(devi).start_blk;
1375 }
35ec7d57 1376 mutex_lock(&SM_I(sbi)->dcc_info->cmd_lock);
004b6862 1377 __update_discard_tree_range(sbi, bdev, lblkstart, blkstart, blklen);
35ec7d57 1378 mutex_unlock(&SM_I(sbi)->dcc_info->cmd_lock);
004b6862
CY		 1379}
1380
20ee4382
CY		 1381static unsigned int __issue_discard_cmd_orderly(struct f2fs_sb_info *sbi,
1382 struct discard_policy *dpolicy)
1383{
1384 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
1385 struct discard_cmd *prev_dc = NULL, *next_dc = NULL;
1386 struct rb_node **insert_p = NULL, *insert_parent = NULL;
1387 struct discard_cmd *dc;
1388 struct blk_plug plug;
1389 unsigned int pos = dcc->next_pos;
1390 unsigned int issued = 0;
1391 bool io_interrupted = false;
1392
1393 mutex_lock(&dcc->cmd_lock);
1394 dc = (struct discard_cmd *)f2fs_lookup_rb_tree_ret(&dcc->root,
1395 NULL, pos,
1396 (struct rb_entry **)&prev_dc,
1397 (struct rb_entry **)&next_dc,
4dada3fd 1398 &insert_p, &insert_parent, true, NULL);
20ee4382
CY		 1399 if (!dc)
1400 dc = next_dc;
1401
1402 blk_start_plug(&plug);
1403
1404 while (dc) {
1405 struct rb_node *node;
6b9cb124 1406 int err = 0;
20ee4382
CY		 1407
1408 if (dc->state != D_PREP)
1409 goto next;
1410
a7d10cf3 1411 if (dpolicy->io_aware && !is_idle(sbi, DISCARD_TIME)) {
20ee4382
CY		 1412 io_interrupted = true;
1413 break;
1414 }
1415
1416 dcc->next_pos = dc->lstart + dc->len;
6b9cb124 1417 err = __submit_discard_cmd(sbi, dpolicy, dc, &issued);
20ee4382 1418
35ec7d57 1419 if (issued >= dpolicy->max_requests)
20ee4382
CY		 1420 break;
1421next:
1422 node = rb_next(&dc->rb_node);
6b9cb124
CY		 1423 if (err)
1424 __remove_discard_cmd(sbi, dc);
20ee4382
CY		 1425 dc = rb_entry_safe(node, struct discard_cmd, rb_node);
1426 }
1427
1428 blk_finish_plug(&plug);
1429
1430 if (!dc)
1431 dcc->next_pos = 0;
1432
1433 mutex_unlock(&dcc->cmd_lock);
1434
1435 if (!issued && io_interrupted)
1436 issued = -1;
1437
1438 return issued;
1439}
141af6ba
ST		 1440static unsigned int __wait_all_discard_cmd(struct f2fs_sb_info *sbi,
1441 struct discard_policy *dpolicy);
20ee4382 1442
78997b56
CY		 1443static int __issue_discard_cmd(struct f2fs_sb_info *sbi,
1444 struct discard_policy *dpolicy)
bd5b0738
CY		 1445{
1446 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
1447 struct list_head *pend_list;
1448 struct discard_cmd *dc, *tmp;
1449 struct blk_plug plug;
141af6ba 1450 int i, issued;
e6c6de18 1451 bool io_interrupted = false;
bd5b0738 1452
6ce48b0c
CY		 1453 if (dpolicy->timeout)
1454 f2fs_update_time(sbi, UMOUNT_DISCARD_TIMEOUT);
03f2c02d 1455
141af6ba
ST		 1456retry:
1457 issued = 0;
78997b56 1458 for (i = MAX_PLIST_NUM - 1; i >= 0; i--) {
6ce48b0c
CY		 1459 if (dpolicy->timeout &&
1460 f2fs_time_over(sbi, UMOUNT_DISCARD_TIMEOUT))
03f2c02d
JK		 1461 break;
1462
78997b56
CY		 1463 if (i + 1 < dpolicy->granularity)
1464 break;
20ee4382 1465
c46867e9 1466 if (i + 1 < dcc->max_ordered_discard && dpolicy->ordered)
20ee4382
CY		 1467 return __issue_discard_cmd_orderly(sbi, dpolicy);
1468
bd5b0738 1469 pend_list = &dcc->pend_list[i];
33da62cf
CY		 1470
1471 mutex_lock(&dcc->cmd_lock);
49c60c67
CY		 1472 if (list_empty(pend_list))
1473 goto next;
67fce70b
CY		 1474 if (unlikely(dcc->rbtree_check))
1475 f2fs_bug_on(sbi, !f2fs_check_rb_tree_consistence(sbi,
2e9b2bb2 1476 &dcc->root, false));
33da62cf 1477 blk_start_plug(&plug);
bd5b0738
CY		 1478 list_for_each_entry_safe(dc, tmp, pend_list, list) {
1479 f2fs_bug_on(sbi, dc->state != D_PREP);
1480
6ce48b0c
CY		 1481 if (dpolicy->timeout &&
1482 f2fs_time_over(sbi, UMOUNT_DISCARD_TIMEOUT))
6e0cd4a9
HX		 1483 break;
1484
ecc9aa00 1485 if (dpolicy->io_aware && i < dpolicy->io_aware_gran &&
a7d10cf3 1486 !is_idle(sbi, DISCARD_TIME)) {
e6c6de18 1487 io_interrupted = true;
522d1711 1488 break;
969d1b18 1489 }
e6c6de18 1490
35ec7d57 1491 __submit_discard_cmd(sbi, dpolicy, dc, &issued);
522d1711 1492
35ec7d57 1493 if (issued >= dpolicy->max_requests)
33da62cf 1494 break;
bd5b0738 1495 }
33da62cf 1496 blk_finish_plug(&plug);
49c60c67 1497next:
33da62cf
CY		 1498 mutex_unlock(&dcc->cmd_lock);
1499
522d1711 1500 if (issued >= dpolicy->max_requests || io_interrupted)
33da62cf 1501 break;
bd5b0738 1502 }
969d1b18 1503
141af6ba
ST		 1504 if (dpolicy->type == DPOLICY_UMOUNT && issued) {
1505 __wait_all_discard_cmd(sbi, dpolicy);
1506 goto retry;
1507 }
1508
e6c6de18
CY		 1509 if (!issued && io_interrupted)
1510 issued = -1;
1511
969d1b18
CY		 1512 return issued;
1513}
1514
cf5c759f 1515static bool __drop_discard_cmd(struct f2fs_sb_info *sbi)
969d1b18
CY		 1516{
1517 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
1518 struct list_head *pend_list;
1519 struct discard_cmd *dc, *tmp;
1520 int i;
cf5c759f 1521 bool dropped = false;
969d1b18
CY		 1522
1523 mutex_lock(&dcc->cmd_lock);
1524 for (i = MAX_PLIST_NUM - 1; i >= 0; i--) {
1525 pend_list = &dcc->pend_list[i];
1526 list_for_each_entry_safe(dc, tmp, pend_list, list) {
1527 f2fs_bug_on(sbi, dc->state != D_PREP);
1528 __remove_discard_cmd(sbi, dc);
cf5c759f 1529 dropped = true;
969d1b18
CY		 1530 }
1531 }
1532 mutex_unlock(&dcc->cmd_lock);
cf5c759f
CY		 1533
1534 return dropped;
bd5b0738
CY		 1535}
1536
4d57b86d 1537void f2fs_drop_discard_cmd(struct f2fs_sb_info *sbi)
7950e9ac
CY		 1538{
1539 __drop_discard_cmd(sbi);
1540}
1541
0ea80512 1542static unsigned int __wait_one_discard_bio(struct f2fs_sb_info *sbi,
2a510c00
CY		 1543 struct discard_cmd *dc)
1544{
1545 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
0ea80512 1546 unsigned int len = 0;
2a510c00
CY		 1547
1548 wait_for_completion_io(&dc->wait);
1549 mutex_lock(&dcc->cmd_lock);
1550 f2fs_bug_on(sbi, dc->state != D_DONE);
1551 dc->ref--;
0ea80512
CY		 1552 if (!dc->ref) {
1553 if (!dc->error)
1554 len = dc->len;
2a510c00 1555 __remove_discard_cmd(sbi, dc);
0ea80512 1556 }
2a510c00 1557 mutex_unlock(&dcc->cmd_lock);
0ea80512
CY		 1558
1559 return len;
2a510c00
CY		 1560}
1561
0ea80512 1562static unsigned int __wait_discard_cmd_range(struct f2fs_sb_info *sbi,
78997b56
CY		 1563 struct discard_policy *dpolicy,
1564 block_t start, block_t end)
63a94fa1
CY		 1565{
1566 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
78997b56
CY		 1567 struct list_head *wait_list = (dpolicy->type == DPOLICY_FSTRIM) ?
1568 &(dcc->fstrim_list) : &(dcc->wait_list);
9e3a845d 1569 struct discard_cmd *dc = NULL, *iter, *tmp;
0ea80512 1570 unsigned int trimmed = 0;
6afae633
CY		 1571
1572next:
9e3a845d 1573 dc = NULL;
63a94fa1
CY		 1574
1575 mutex_lock(&dcc->cmd_lock);
9e3a845d
JK		 1576 list_for_each_entry_safe(iter, tmp, wait_list, list) {
1577 if (iter->lstart + iter->len <= start || end <= iter->lstart)
8412663d 1578 continue;
9e3a845d 1579 if (iter->len < dpolicy->granularity)
8412663d 1580 continue;
9e3a845d
JK		 1581 if (iter->state == D_DONE && !iter->ref) {
1582 wait_for_completion_io(&iter->wait);
1583 if (!iter->error)
1584 trimmed += iter->len;
1585 __remove_discard_cmd(sbi, iter);
6afae633 1586 } else {
9e3a845d
JK		 1587 iter->ref++;
1588 dc = iter;
6afae633 1589 break;
63a94fa1
CY		 1590 }
1591 }
1592 mutex_unlock(&dcc->cmd_lock);
6afae633 1593
9e3a845d 1594 if (dc) {
0ea80512 1595 trimmed += __wait_one_discard_bio(sbi, dc);
6afae633
CY		 1596 goto next;
1597 }
0ea80512
CY		 1598
1599 return trimmed;
63a94fa1
CY		 1600}
1601
01f9cf6d 1602static unsigned int __wait_all_discard_cmd(struct f2fs_sb_info *sbi,
78997b56 1603 struct discard_policy *dpolicy)
8412663d 1604{
9a997188 1605 struct discard_policy dp;
01f9cf6d 1606 unsigned int discard_blks;
9a997188 1607
01f9cf6d
CY		 1608 if (dpolicy)
1609 return __wait_discard_cmd_range(sbi, dpolicy, 0, UINT_MAX);
9a997188
JK		 1610
1611 /* wait all */
8bb4f253 1612 __init_discard_policy(sbi, &dp, DPOLICY_FSTRIM, 1);
01f9cf6d 1613 discard_blks = __wait_discard_cmd_range(sbi, &dp, 0, UINT_MAX);
8bb4f253 1614 __init_discard_policy(sbi, &dp, DPOLICY_UMOUNT, 1);
01f9cf6d
CY		 1615 discard_blks += __wait_discard_cmd_range(sbi, &dp, 0, UINT_MAX);
1616
1617 return discard_blks;
8412663d
CY		 1618}
1619
004b6862 1620/* This should be covered by global mutex, &sit_i->sentry_lock */
94b1e10e 1621static void f2fs_wait_discard_bio(struct f2fs_sb_info *sbi, block_t blkaddr)
004b6862
CY		 1622{
1623 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
1624 struct discard_cmd *dc;
ec9895ad 1625 bool need_wait = false;
004b6862
CY		 1626
1627 mutex_lock(&dcc->cmd_lock);
4d57b86d
CY		 1628 dc = (struct discard_cmd *)f2fs_lookup_rb_tree(&dcc->root,
1629 NULL, blkaddr);
004b6862 1630 if (dc) {
ec9895ad
CY		 1631 if (dc->state == D_PREP) {
1632 __punch_discard_cmd(sbi, dc, blkaddr);
1633 } else {
1634 dc->ref++;
1635 need_wait = true;
1636 }
275b66b0 1637 }
d431413f 1638 mutex_unlock(&dcc->cmd_lock);
ec9895ad 1639
2a510c00
CY		 1640 if (need_wait)
1641 __wait_one_discard_bio(sbi, dc);
d431413f
CY		 1642}
1643
4d57b86d 1644void f2fs_stop_discard_thread(struct f2fs_sb_info *sbi)
cce13252
CY		 1645{
1646 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
1647
1648 if (dcc && dcc->f2fs_issue_discard) {
1649 struct task_struct *discard_thread = dcc->f2fs_issue_discard;
1650
1651 dcc->f2fs_issue_discard = NULL;
1652 kthread_stop(discard_thread);
ec9895ad 1653 }
d431413f
CY		 1654}
1655
8412663d 1656/* This comes from f2fs_put_super */
03f2c02d 1657bool f2fs_issue_discard_timeout(struct f2fs_sb_info *sbi)
969d1b18
CY		 1658{
1659 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
78997b56 1660 struct discard_policy dpolicy;
cf5c759f 1661 bool dropped;
969d1b18 1662
25547439
YL		 1663 if (!atomic_read(&dcc->discard_cmd_cnt))
1664 return false;
1665
8bb4f253
JK		 1666 __init_discard_policy(sbi, &dpolicy, DPOLICY_UMOUNT,
1667 dcc->discard_granularity);
78997b56 1668 __issue_discard_cmd(sbi, &dpolicy);
cf5c759f 1669 dropped = __drop_discard_cmd(sbi);
cf5c759f 1670
9a997188
JK		 1671 /* just to make sure there is no pending discard commands */
1672 __wait_all_discard_cmd(sbi, NULL);
2482c432
CY		 1673
1674 f2fs_bug_on(sbi, atomic_read(&dcc->discard_cmd_cnt));
cf5c759f 1675 return dropped;
969d1b18
CY		 1676}
1677
15469963
JK		 1678static int issue_discard_thread(void *data)
1679{
1680 struct f2fs_sb_info *sbi = data;
1681 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
1682 wait_queue_head_t *q = &dcc->discard_wait_queue;
78997b56 1683 struct discard_policy dpolicy;
d2d8e896 1684 unsigned int wait_ms = dcc->min_discard_issue_time;
969d1b18 1685 int issued;
15469963 1686
1d7be270 1687 set_freezable();
15469963 1688
1d7be270 1689 do {
48c08c51
YL		 1690 wait_event_interruptible_timeout(*q,
1691 kthread_should_stop() || freezing(current) ||
1692 dcc->discard_wake,
1693 msecs_to_jiffies(wait_ms));
1694
c35b8d5e
ST		 1695 if (sbi->gc_mode == GC_URGENT_HIGH ||
1696 !f2fs_available_free_memory(sbi, DISCARD_CACHE))
1697 __init_discard_policy(sbi, &dpolicy, DPOLICY_FORCE, 1);
1698 else
1699 __init_discard_policy(sbi, &dpolicy, DPOLICY_BG,
1700 dcc->discard_granularity);
1701
35a9a766
SY		 1702 if (dcc->discard_wake)
1703 dcc->discard_wake = 0;
1704
76c7bfb3
JK		 1705 /* clean up pending candidates before going to sleep */
1706 if (atomic_read(&dcc->queued_discard))
1707 __wait_all_discard_cmd(sbi, NULL);
1708
1d7be270
JK		 1709 if (try_to_freeze())
1710 continue;
3b60d802
CY		 1711 if (f2fs_readonly(sbi->sb))
1712 continue;
1d7be270
JK		 1713 if (kthread_should_stop())
1714 return 0;
48c08c51
YL		 1715 if (is_sbi_flag_set(sbi, SBI_NEED_FSCK) ||
1716 !atomic_read(&dcc->discard_cmd_cnt)) {
d6184774
YH		 1717 wait_ms = dpolicy.max_interval;
1718 continue;
1719 }
969d1b18 1720
dc6febb6
CY		 1721 sb_start_intwrite(sbi->sb);
1722
78997b56 1723 issued = __issue_discard_cmd(sbi, &dpolicy);
f9d1dced 1724 if (issued > 0) {
78997b56
CY		 1725 __wait_all_discard_cmd(sbi, &dpolicy);
1726 wait_ms = dpolicy.min_interval;
5f029c04 1727 } else if (issued == -1) {
a7d10cf3
ST		 1728 wait_ms = f2fs_time_to_wait(sbi, DISCARD_TIME);
1729 if (!wait_ms)
abde73c7 1730 wait_ms = dpolicy.mid_interval;
969d1b18 1731 } else {
78997b56 1732 wait_ms = dpolicy.max_interval;
969d1b18 1733 }
48c08c51
YL		 1734 if (!atomic_read(&dcc->discard_cmd_cnt))
1735 wait_ms = dpolicy.max_interval;
1d7be270 1736
dc6febb6 1737 sb_end_intwrite(sbi->sb);
1d7be270 1738
1d7be270
JK		 1739 } while (!kthread_should_stop());
1740 return 0;
15469963
JK		 1741}
1742
f46e8809 1743#ifdef CONFIG_BLK_DEV_ZONED
3c62be17
JK		 1744static int __f2fs_issue_discard_zone(struct f2fs_sb_info *sbi,
1745 struct block_device *bdev, block_t blkstart, block_t blklen)
f46e8809 1746{
92592285 1747 sector_t sector, nr_sects;
10a875f8 1748 block_t lblkstart = blkstart;
3c62be17
JK		 1749 int devi = 0;
1750
0916878d 1751 if (f2fs_is_multi_device(sbi)) {
3c62be17 1752 devi = f2fs_target_device_index(sbi, blkstart);
95175daf
DLM		 1753 if (blkstart < FDEV(devi).start_blk ||
1754 blkstart > FDEV(devi).end_blk) {
dcbb4c10 1755 f2fs_err(sbi, "Invalid block %x", blkstart);
95175daf
DLM		 1756 return -EIO;
1757 }
3c62be17
JK		 1758 blkstart -= FDEV(devi).start_blk;
1759 }
f46e8809 1760
95175daf
DLM		 1761 /* For sequential zones, reset the zone write pointer */
1762 if (f2fs_blkz_is_seq(sbi, devi, blkstart)) {
92592285
JK		 1763 sector = SECTOR_FROM_BLOCK(blkstart);
1764 nr_sects = SECTOR_FROM_BLOCK(blklen);
1765
1766 if (sector & (bdev_zone_sectors(bdev) - 1) ||
1767 nr_sects != bdev_zone_sectors(bdev)) {
dcbb4c10
JP		 1768 f2fs_err(sbi, "(%d) %s: Unaligned zone reset attempted (block %x + %x)",
1769 devi, sbi->s_ndevs ? FDEV(devi).path : "",
1770 blkstart, blklen);
92592285
JK		 1771 return -EIO;
1772 }
d50aaeec 1773 trace_f2fs_issue_reset_zone(bdev, blkstart);
6c1b1da5
AJ		 1774 return blkdev_zone_mgmt(bdev, REQ_OP_ZONE_RESET,
1775 sector, nr_sects, GFP_NOFS);
f46e8809 1776 }
95175daf
DLM		 1777
1778 /* For conventional zones, use regular discard if supported */
62081639
YL		 1779 __queue_discard_cmd(sbi, bdev, lblkstart, blklen);
1780 return 0;
f46e8809
DLM		 1781}
1782#endif
1783
3c62be17
JK		 1784static int __issue_discard_async(struct f2fs_sb_info *sbi,
1785 struct block_device *bdev, block_t blkstart, block_t blklen)
1786{
1787#ifdef CONFIG_BLK_DEV_ZONED
7f3d7719 1788 if (f2fs_sb_has_blkzoned(sbi) && bdev_is_zoned(bdev))
3c62be17
JK		 1789 return __f2fs_issue_discard_zone(sbi, bdev, blkstart, blklen);
1790#endif
62081639
YL		 1791 __queue_discard_cmd(sbi, bdev, blkstart, blklen);
1792 return 0;
3c62be17
JK		 1793}
1794
1e87a78d 1795static int f2fs_issue_discard(struct f2fs_sb_info *sbi,
37208879
JK		 1796 block_t blkstart, block_t blklen)
1797{
3c62be17
JK		 1798 sector_t start = blkstart, len = 0;
1799 struct block_device *bdev;
a66cdd98
JK		 1800 struct seg_entry *se;
1801 unsigned int offset;
1802 block_t i;
3c62be17
JK		 1803 int err = 0;
1804
1805 bdev = f2fs_target_device(sbi, blkstart, NULL);
1806
1807 for (i = blkstart; i < blkstart + blklen; i++, len++) {
1808 if (i != start) {
1809 struct block_device *bdev2 =
1810 f2fs_target_device(sbi, i, NULL);
1811
1812 if (bdev2 != bdev) {
1813 err = __issue_discard_async(sbi, bdev,
1814 start, len);
1815 if (err)
1816 return err;
1817 bdev = bdev2;
1818 start = i;
1819 len = 0;
1820 }
1821 }
a66cdd98 1822
a66cdd98
JK		 1823 se = get_seg_entry(sbi, GET_SEGNO(sbi, i));
1824 offset = GET_BLKOFF_FROM_SEG0(sbi, i);
1825
4f993264
CY		 1826 if (f2fs_block_unit_discard(sbi) &&
1827 !f2fs_test_and_set_bit(offset, se->discard_map))
a66cdd98
JK		 1828 sbi->discard_blks--;
1829 }
f46e8809 1830
3c62be17
JK		 1831 if (len)
1832 err = __issue_discard_async(sbi, bdev, start, len);
1833 return err;
1e87a78d
JK		 1834}
1835
25290fa5
JK		 1836static bool add_discard_addrs(struct f2fs_sb_info *sbi, struct cp_control *cpc,
1837 bool check_only)
adf4983b 1838{
b2955550
JK		 1839 int entries = SIT_VBLOCK_MAP_SIZE / sizeof(unsigned long);
1840 int max_blocks = sbi->blocks_per_seg;
4b2fecc8 1841 struct seg_entry *se = get_seg_entry(sbi, cpc->trim_start);
b2955550
JK		 1842 unsigned long *cur_map = (unsigned long *)se->cur_valid_map;
1843 unsigned long *ckpt_map = (unsigned long *)se->ckpt_valid_map;
a66cdd98 1844 unsigned long *discard_map = (unsigned long *)se->discard_map;
60a3b782 1845 unsigned long *dmap = SIT_I(sbi)->tmp_map;
b2955550 1846 unsigned int start = 0, end = -1;
c473f1a9 1847 bool force = (cpc->reason & CP_DISCARD);
a7eeb823 1848 struct discard_entry *de = NULL;
46f84c2c 1849 struct list_head *head = &SM_I(sbi)->dcc_info->entry_list;
b2955550
JK		 1850 int i;
1851
4f993264
CY		 1852 if (se->valid_blocks == max_blocks || !f2fs_hw_support_discard(sbi) ||
1853 !f2fs_block_unit_discard(sbi))
25290fa5 1854 return false;
b2955550 1855
a66cdd98 1856 if (!force) {
7d20c8ab 1857 if (!f2fs_realtime_discard_enable(sbi) || !se->valid_blocks ||
0b54fb84
JK		 1858 SM_I(sbi)->dcc_info->nr_discards >=
1859 SM_I(sbi)->dcc_info->max_discards)
25290fa5 1860 return false;
4b2fecc8
JK		 1861 }
1862
b2955550
JK		 1863 /* SIT_VBLOCK_MAP_SIZE should be multiple of sizeof(unsigned long) */
1864 for (i = 0; i < entries; i++)
a66cdd98 1865 dmap[i] = force ? ~ckpt_map[i] & ~discard_map[i] :
d7bc2484 1866 (cur_map[i] ^ ckpt_map[i]) & ckpt_map[i];
b2955550 1867
0b54fb84
JK		 1868 while (force || SM_I(sbi)->dcc_info->nr_discards <=
1869 SM_I(sbi)->dcc_info->max_discards) {
b2955550
JK		 1870 start = __find_rev_next_bit(dmap, max_blocks, end + 1);
1871 if (start >= max_blocks)
1872 break;
1873
1874 end = __find_rev_next_zero_bit(dmap, max_blocks, start + 1);
c7b41e16
YH		 1875 if (force && start && end != max_blocks
1876 && (end - start) < cpc->trim_minlen)
1877 continue;
1878
25290fa5
JK		 1879 if (check_only)
1880 return true;
1881
a7eeb823
CY		 1882 if (!de) {
1883 de = f2fs_kmem_cache_alloc(discard_entry_slab,
32410577 1884 GFP_F2FS_ZERO, true, NULL);
a7eeb823
CY		 1885 de->start_blkaddr = START_BLOCK(sbi, cpc->trim_start);
1886 list_add_tail(&de->list, head);
1887 }
1888
1889 for (i = start; i < end; i++)
1890 __set_bit_le(i, (void *)de->discard_map);
1891
1892 SM_I(sbi)->dcc_info->nr_discards += end - start;
b2955550 1893 }
25290fa5 1894 return false;
b2955550
JK		 1895}
1896
af8ff65b
CY		 1897static void release_discard_addr(struct discard_entry *entry)
1898{
1899 list_del(&entry->list);
1900 kmem_cache_free(discard_entry_slab, entry);
1901}
1902
4d57b86d 1903void f2fs_release_discard_addrs(struct f2fs_sb_info *sbi)
4b2fecc8 1904{
46f84c2c 1905 struct list_head *head = &(SM_I(sbi)->dcc_info->entry_list);
4b2fecc8
JK		 1906 struct discard_entry *entry, *this;
1907
1908 /* drop caches */
af8ff65b
CY		 1909 list_for_each_entry_safe(entry, this, head, list)
1910 release_discard_addr(entry);
4b2fecc8
JK		 1911}
1912
0a8165d7 1913/*
4d57b86d 1914 * Should call f2fs_clear_prefree_segments after checkpoint is done.
351df4b2
JK		 1915 */
1916static void set_prefree_as_free_segments(struct f2fs_sb_info *sbi)
1917{
1918 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
b65ee148 1919 unsigned int segno;
351df4b2
JK		 1920
1921 mutex_lock(&dirty_i->seglist_lock);
7cd8558b 1922 for_each_set_bit(segno, dirty_i->dirty_segmap[PRE], MAIN_SEGS(sbi))
d0b9e42a 1923 __set_test_and_free(sbi, segno, false);
351df4b2
JK		 1924 mutex_unlock(&dirty_i->seglist_lock);
1925}
1926
4d57b86d
CY		 1927void f2fs_clear_prefree_segments(struct f2fs_sb_info *sbi,
1928 struct cp_control *cpc)
351df4b2 1929{
969d1b18
CY		 1930 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
1931 struct list_head *head = &dcc->entry_list;
2d7b822a 1932 struct discard_entry *entry, *this;
351df4b2 1933 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
29e59c14 1934 unsigned long *prefree_map = dirty_i->dirty_segmap[PRE];
29e59c14 1935 unsigned int start = 0, end = -1;
36abef4e 1936 unsigned int secno, start_segno;
c473f1a9 1937 bool force = (cpc->reason & CP_DISCARD);
4f993264
CY		 1938 bool section_alignment = F2FS_OPTION(sbi).discard_unit ==
1939 DISCARD_UNIT_SECTION;
1940
1941 if (f2fs_lfs_mode(sbi) && __is_large_section(sbi))
1942 section_alignment = true;
351df4b2
JK		 1943
1944 mutex_lock(&dirty_i->seglist_lock);
29e59c14 1945
351df4b2 1946 while (1) {
29e59c14 1947 int i;
ad6672bb 1948
4f993264 1949 if (section_alignment && end != -1)
ad6672bb 1950 end--;
7cd8558b
JK		 1951 start = find_next_bit(prefree_map, MAIN_SEGS(sbi), end + 1);
1952 if (start >= MAIN_SEGS(sbi))
351df4b2 1953 break;
7cd8558b
JK		 1954 end = find_next_zero_bit(prefree_map, MAIN_SEGS(sbi),
1955 start + 1);
29e59c14 1956
4f993264 1957 if (section_alignment) {
ad6672bb
YS		 1958 start = rounddown(start, sbi->segs_per_sec);
1959 end = roundup(end, sbi->segs_per_sec);
1960 }
29e59c14 1961
ad6672bb
YS		 1962 for (i = start; i < end; i++) {
1963 if (test_and_clear_bit(i, prefree_map))
1964 dirty_i->nr_dirty[PRE]--;
1965 }
29e59c14 1966
7d20c8ab 1967 if (!f2fs_realtime_discard_enable(sbi))
29e59c14 1968 continue;
351df4b2 1969
650d3c4e
YH		 1970 if (force && start >= cpc->trim_start &&
1971 (end - 1) <= cpc->trim_end)
1972 continue;
1973
b0332a0f 1974 if (!f2fs_lfs_mode(sbi) || !__is_large_section(sbi)) {
36abef4e 1975 f2fs_issue_discard(sbi, START_BLOCK(sbi, start),
37208879 1976 (end - start) << sbi->log_blocks_per_seg);
36abef4e
JK		 1977 continue;
1978 }
1979next:
4ddb1a4d
JK		 1980 secno = GET_SEC_FROM_SEG(sbi, start);
1981 start_segno = GET_SEG_FROM_SEC(sbi, secno);
36abef4e 1982 if (!IS_CURSEC(sbi, secno) &&
302bd348 1983 !get_valid_blocks(sbi, start, true))
36abef4e
JK		 1984 f2fs_issue_discard(sbi, START_BLOCK(sbi, start_segno),
1985 sbi->segs_per_sec << sbi->log_blocks_per_seg);
1986
1987 start = start_segno + sbi->segs_per_sec;
1988 if (start < end)
1989 goto next;
8b107f5b
JK		 1990 else
1991 end = start - 1;
351df4b2
JK		 1992 }
1993 mutex_unlock(&dirty_i->seglist_lock);
b2955550 1994
4f993264
CY		 1995 if (!f2fs_block_unit_discard(sbi))
1996 goto wakeup;
1997
b2955550 1998 /* send small discards */
2d7b822a 1999 list_for_each_entry_safe(entry, this, head, list) {
a7eeb823
CY		 2000 unsigned int cur_pos = 0, next_pos, len, total_len = 0;
2001 bool is_valid = test_bit_le(0, entry->discard_map);
2002
2003find_next:
2004 if (is_valid) {
2005 next_pos = find_next_zero_bit_le(entry->discard_map,
2006 sbi->blocks_per_seg, cur_pos);
2007 len = next_pos - cur_pos;
2008
7beb01f7 2009 if (f2fs_sb_has_blkzoned(sbi) ||
acfd2810 2010 (force && len < cpc->trim_minlen))
a7eeb823
CY		 2011 goto skip;
2012
2013 f2fs_issue_discard(sbi, entry->start_blkaddr + cur_pos,
2014 len);
a7eeb823
CY		 2015 total_len += len;
2016 } else {
2017 next_pos = find_next_bit_le(entry->discard_map,
2018 sbi->blocks_per_seg, cur_pos);
2019 }
836b5a63 2020skip:
a7eeb823
CY		 2021 cur_pos = next_pos;
2022 is_valid = !is_valid;
2023
2024 if (cur_pos < sbi->blocks_per_seg)
2025 goto find_next;
2026
af8ff65b 2027 release_discard_addr(entry);
969d1b18 2028 dcc->nr_discards -= total_len;
b2955550 2029 }
34e159da 2030
4f993264 2031wakeup:
01983c71 2032 wake_up_discard_thread(sbi, false);
351df4b2
JK		 2033}
2034
4d674904 2035int f2fs_start_discard_thread(struct f2fs_sb_info *sbi)
0b54fb84 2036{
15469963 2037 dev_t dev = sbi->sb->s_bdev->bd_dev;
4d674904
FC		 2038 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
2039 int err = 0;
2040
2041 if (!f2fs_realtime_discard_enable(sbi))
2042 return 0;
2043
2044 dcc->f2fs_issue_discard = kthread_run(issue_discard_thread, sbi,
2045 "f2fs_discard-%u:%u", MAJOR(dev), MINOR(dev));
91586ce0 2046 if (IS_ERR(dcc->f2fs_issue_discard)) {
4d674904 2047 err = PTR_ERR(dcc->f2fs_issue_discard);
91586ce0
CY		 2048 dcc->f2fs_issue_discard = NULL;
2049 }
4d674904
FC		 2050
2051 return err;
2052}
2053
2054static int create_discard_cmd_control(struct f2fs_sb_info *sbi)
2055{
0b54fb84 2056 struct discard_cmd_control *dcc;
ba48a33e 2057 int err = 0, i;
0b54fb84
JK		 2058
2059 if (SM_I(sbi)->dcc_info) {
2060 dcc = SM_I(sbi)->dcc_info;
2061 goto init_thread;
2062 }
2063
acbf054d 2064 dcc = f2fs_kzalloc(sbi, sizeof(struct discard_cmd_control), GFP_KERNEL);
0b54fb84
JK		 2065 if (!dcc)
2066 return -ENOMEM;
2067
969d1b18 2068 dcc->discard_granularity = DEFAULT_DISCARD_GRANULARITY;
c46867e9 2069 dcc->max_ordered_discard = DEFAULT_MAX_ORDERED_DISCARD_GRANULARITY;
4f993264
CY		 2070 if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SEGMENT)
2071 dcc->discard_granularity = sbi->blocks_per_seg;
2072 else if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SECTION)
2073 dcc->discard_granularity = BLKS_PER_SEC(sbi);
2074
46f84c2c 2075 INIT_LIST_HEAD(&dcc->entry_list);
78997b56 2076 for (i = 0; i < MAX_PLIST_NUM; i++)
ba48a33e 2077 INIT_LIST_HEAD(&dcc->pend_list[i]);
46f84c2c 2078 INIT_LIST_HEAD(&dcc->wait_list);
8412663d 2079 INIT_LIST_HEAD(&dcc->fstrim_list);
15469963 2080 mutex_init(&dcc->cmd_lock);
8b8dd65f 2081 atomic_set(&dcc->issued_discard, 0);
72691af6 2082 atomic_set(&dcc->queued_discard, 0);
5f32366a 2083 atomic_set(&dcc->discard_cmd_cnt, 0);
0b54fb84 2084 dcc->nr_discards = 0;
d618ebaf 2085 dcc->max_discards = MAIN_SEGS(sbi) << sbi->log_blocks_per_seg;
d2d8e896
KV		 2086 dcc->max_discard_request = DEF_MAX_DISCARD_REQUEST;
2087 dcc->min_discard_issue_time = DEF_MIN_DISCARD_ISSUE_TIME;
2088 dcc->mid_discard_issue_time = DEF_MID_DISCARD_ISSUE_TIME;
2089 dcc->max_discard_issue_time = DEF_MAX_DISCARD_ISSUE_TIME;
8a47d228 2090 dcc->discard_urgent_util = DEF_DISCARD_URGENT_UTIL;
d84d1cbd 2091 dcc->undiscard_blks = 0;
20ee4382 2092 dcc->next_pos = 0;
4dada3fd 2093 dcc->root = RB_ROOT_CACHED;
67fce70b 2094 dcc->rbtree_check = false;
0b54fb84 2095
15469963 2096 init_waitqueue_head(&dcc->discard_wait_queue);
0b54fb84
JK		 2097 SM_I(sbi)->dcc_info = dcc;
2098init_thread:
4d674904
FC		 2099 err = f2fs_start_discard_thread(sbi);
2100 if (err) {
c8eb7024 2101 kfree(dcc);
15469963 2102 SM_I(sbi)->dcc_info = NULL;
15469963
JK		 2103 }
2104
0b54fb84
JK		 2105 return err;
2106}
2107
f099405f 2108static void destroy_discard_cmd_control(struct f2fs_sb_info *sbi)
0b54fb84
JK		 2109{
2110 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
2111
f099405f
CY		 2112 if (!dcc)
2113 return;
2114
4d57b86d 2115 f2fs_stop_discard_thread(sbi);
f099405f 2116
04f9287a
CY		 2117 /*
2118 * Recovery can cache discard commands, so in error path of
2119 * fill_super(), it needs to give a chance to handle them.
2120 */
25547439 2121 f2fs_issue_discard_timeout(sbi);
04f9287a 2122
c8eb7024 2123 kfree(dcc);
f099405f 2124 SM_I(sbi)->dcc_info = NULL;
0b54fb84
JK		 2125}
2126
184a5cd2 2127static bool __mark_sit_entry_dirty(struct f2fs_sb_info *sbi, unsigned int segno)
351df4b2
JK		 2128{
2129 struct sit_info *sit_i = SIT_I(sbi);
184a5cd2
CY		 2130
2131 if (!__test_and_set_bit(segno, sit_i->dirty_sentries_bitmap)) {
351df4b2 2132 sit_i->dirty_sentries++;
184a5cd2
CY		 2133 return false;
2134 }
2135
2136 return true;
351df4b2
JK		 2137}
2138
2139static void __set_sit_entry_type(struct f2fs_sb_info *sbi, int type,
2140 unsigned int segno, int modified)
2141{
2142 struct seg_entry *se = get_seg_entry(sbi, segno);
5f029c04 2143
351df4b2
JK		 2144 se->type = type;
2145 if (modified)
2146 __mark_sit_entry_dirty(sbi, segno);
2147}
2148
c5d02785
CY		 2149static inline unsigned long long get_segment_mtime(struct f2fs_sb_info *sbi,
2150 block_t blkaddr)
6f3a01ae
CY		 2151{
2152 unsigned int segno = GET_SEGNO(sbi, blkaddr);
c5d02785
CY		 2153
2154 if (segno == NULL_SEGNO)
2155 return 0;
2156 return get_seg_entry(sbi, segno)->mtime;
2157}
2158
2159static void update_segment_mtime(struct f2fs_sb_info *sbi, block_t blkaddr,
2160 unsigned long long old_mtime)
2161{
2162 struct seg_entry *se;
2163 unsigned int segno = GET_SEGNO(sbi, blkaddr);
2164 unsigned long long ctime = get_mtime(sbi, false);
2165 unsigned long long mtime = old_mtime ? old_mtime : ctime;
2166
2167 if (segno == NULL_SEGNO)
2168 return;
2169
2170 se = get_seg_entry(sbi, segno);
6f3a01ae
CY		 2171
2172 if (!se->mtime)
2173 se->mtime = mtime;
2174 else
2175 se->mtime = div_u64(se->mtime * se->valid_blocks + mtime,
2176 se->valid_blocks + 1);
2177
c5d02785
CY		 2178 if (ctime > SIT_I(sbi)->max_mtime)
2179 SIT_I(sbi)->max_mtime = ctime;
6f3a01ae
CY		 2180}
2181
351df4b2
JK		 2182static void update_sit_entry(struct f2fs_sb_info *sbi, block_t blkaddr, int del)
2183{
2184 struct seg_entry *se;
2185 unsigned int segno, offset;
2186 long int new_vblocks;
6415fedc
YS		 2187 bool exist;
2188#ifdef CONFIG_F2FS_CHECK_FS
2189 bool mir_exist;
2190#endif
351df4b2
JK		 2191
2192 segno = GET_SEGNO(sbi, blkaddr);
2193
2194 se = get_seg_entry(sbi, segno);
2195 new_vblocks = se->valid_blocks + del;
491c0854 2196 offset = GET_BLKOFF_FROM_SEG0(sbi, blkaddr);
351df4b2 2197
9feffe14 2198 f2fs_bug_on(sbi, (new_vblocks < 0 ||
de881df9 2199 (new_vblocks > f2fs_usable_blks_in_seg(sbi, segno))));
351df4b2
JK		 2200
2201 se->valid_blocks = new_vblocks;
351df4b2
JK		 2202
2203 /* Update valid block bitmap */
2204 if (del > 0) {
6415fedc 2205 exist = f2fs_test_and_set_bit(offset, se->cur_valid_map);
355e7891 2206#ifdef CONFIG_F2FS_CHECK_FS
6415fedc
YS		 2207 mir_exist = f2fs_test_and_set_bit(offset,
2208 se->cur_valid_map_mir);
2209 if (unlikely(exist != mir_exist)) {
dcbb4c10
JP		 2210 f2fs_err(sbi, "Inconsistent error when setting bitmap, blk:%u, old bit:%d",
2211 blkaddr, exist);
05796763 2212 f2fs_bug_on(sbi, 1);
6415fedc 2213 }
355e7891 2214#endif
6415fedc 2215 if (unlikely(exist)) {
dcbb4c10
JP		 2216 f2fs_err(sbi, "Bitmap was wrongly set, blk:%u",
2217 blkaddr);
6415fedc 2218 f2fs_bug_on(sbi, 1);
35ee82ca
YS		 2219 se->valid_blocks--;
2220 del = 0;
355e7891 2221 }
6415fedc 2222
4f993264
CY		 2223 if (f2fs_block_unit_discard(sbi) &&
2224 !f2fs_test_and_set_bit(offset, se->discard_map))
a66cdd98 2225 sbi->discard_blks--;
720037f9 2226
899fee36
CY		 2227 /*
2228 * SSR should never reuse block which is checkpointed
2229 * or newly invalidated.
2230 */
2231 if (!is_sbi_flag_set(sbi, SBI_CP_DISABLED)) {
720037f9
JK		 2232 if (!f2fs_test_and_set_bit(offset, se->ckpt_valid_map))
2233 se->ckpt_valid_blocks++;
2234 }
351df4b2 2235 } else {
6415fedc 2236 exist = f2fs_test_and_clear_bit(offset, se->cur_valid_map);
355e7891 2237#ifdef CONFIG_F2FS_CHECK_FS
6415fedc
YS		 2238 mir_exist = f2fs_test_and_clear_bit(offset,
2239 se->cur_valid_map_mir);
2240 if (unlikely(exist != mir_exist)) {
dcbb4c10
JP		 2241 f2fs_err(sbi, "Inconsistent error when clearing bitmap, blk:%u, old bit:%d",
2242 blkaddr, exist);
05796763 2243 f2fs_bug_on(sbi, 1);
6415fedc 2244 }
355e7891 2245#endif
6415fedc 2246 if (unlikely(!exist)) {
dcbb4c10
JP		 2247 f2fs_err(sbi, "Bitmap was wrongly cleared, blk:%u",
2248 blkaddr);
6415fedc 2249 f2fs_bug_on(sbi, 1);
35ee82ca
YS		 2250 se->valid_blocks++;
2251 del = 0;
4354994f
DR		 2252 } else if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
2253 /*
2254 * If checkpoints are off, we must not reuse data that
2255 * was used in the previous checkpoint. If it was used
2256 * before, we must track that to know how much space we
2257 * really have.
2258 */
c9c8ed50
CY		 2259 if (f2fs_test_bit(offset, se->ckpt_valid_map)) {
2260 spin_lock(&sbi->stat_lock);
4354994f 2261 sbi->unusable_block_count++;
c9c8ed50
CY		 2262 spin_unlock(&sbi->stat_lock);
2263 }
355e7891 2264 }
6415fedc 2265
4f993264
CY		 2266 if (f2fs_block_unit_discard(sbi) &&
2267 f2fs_test_and_clear_bit(offset, se->discard_map))
a66cdd98 2268 sbi->discard_blks++;
351df4b2
JK		 2269 }
2270 if (!f2fs_test_bit(offset, se->ckpt_valid_map))
2271 se->ckpt_valid_blocks += del;
2272
2273 __mark_sit_entry_dirty(sbi, segno);
2274
2275 /* update total number of valid blocks to be written in ckpt area */
2276 SIT_I(sbi)->written_valid_blocks += del;
2277
2c70c5e3 2278 if (__is_large_section(sbi))
351df4b2
JK		 2279 get_sec_entry(sbi, segno)->valid_blocks += del;
2280}
2281
4d57b86d 2282void f2fs_invalidate_blocks(struct f2fs_sb_info *sbi, block_t addr)
351df4b2
JK		 2283{
2284 unsigned int segno = GET_SEGNO(sbi, addr);
2285 struct sit_info *sit_i = SIT_I(sbi);
2286
9850cf4a 2287 f2fs_bug_on(sbi, addr == NULL_ADDR);
4c8ff709 2288 if (addr == NEW_ADDR || addr == COMPRESS_ADDR)
351df4b2
JK		 2289 return;
2290
6aa58d8a 2291 invalidate_mapping_pages(META_MAPPING(sbi), addr, addr);
6ce19aff 2292 f2fs_invalidate_compress_page(sbi, addr);
6aa58d8a 2293
351df4b2 2294 /* add it into sit main buffer */
3d26fa6b 2295 down_write(&sit_i->sentry_lock);
351df4b2 2296
c5d02785 2297 update_segment_mtime(sbi, addr, 0);
351df4b2
JK		 2298 update_sit_entry(sbi, addr, -1);
2299
2300 /* add it into dirty seglist */
2301 locate_dirty_segment(sbi, segno);
2302
3d26fa6b 2303 up_write(&sit_i->sentry_lock);
351df4b2
JK		 2304}
2305
4d57b86d 2306bool f2fs_is_checkpointed_data(struct f2fs_sb_info *sbi, block_t blkaddr)
6e2c64ad
JK		 2307{
2308 struct sit_info *sit_i = SIT_I(sbi);
2309 unsigned int segno, offset;
2310 struct seg_entry *se;
2311 bool is_cp = false;
2312
93770ab7 2313 if (!__is_valid_data_blkaddr(blkaddr))
6e2c64ad
JK		 2314 return true;
2315
3d26fa6b 2316 down_read(&sit_i->sentry_lock);
6e2c64ad
JK		 2317
2318 segno = GET_SEGNO(sbi, blkaddr);
2319 se = get_seg_entry(sbi, segno);
2320 offset = GET_BLKOFF_FROM_SEG0(sbi, blkaddr);
2321
2322 if (f2fs_test_bit(offset, se->ckpt_valid_map))
2323 is_cp = true;
2324
3d26fa6b 2325 up_read(&sit_i->sentry_lock);
6e2c64ad
JK		 2326
2327 return is_cp;
2328}
2329
0a8165d7 2330/*
351df4b2
JK		 2331 * This function should be resided under the curseg_mutex lock
2332 */
2333static void __add_sum_entry(struct f2fs_sb_info *sbi, int type,
e79efe3b 2334 struct f2fs_summary *sum)
351df4b2
JK		 2335{
2336 struct curseg_info *curseg = CURSEG_I(sbi, type);
2337 void *addr = curseg->sum_blk;
5f029c04 2338
e79efe3b 2339 addr += curseg->next_blkoff * sizeof(struct f2fs_summary);
351df4b2 2340 memcpy(addr, sum, sizeof(struct f2fs_summary));
351df4b2
JK		 2341}
2342
0a8165d7 2343/*
351df4b2
JK		 2344 * Calculate the number of current summary pages for writing
2345 */
4d57b86d 2346int f2fs_npages_for_summary_flush(struct f2fs_sb_info *sbi, bool for_ra)
351df4b2 2347{
351df4b2 2348 int valid_sum_count = 0;
9a47938b 2349 int i, sum_in_page;
351df4b2
JK		 2350
2351 for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) {
2352 if (sbi->ckpt->alloc_type[i] == SSR)
2353 valid_sum_count += sbi->blocks_per_seg;
3fa06d7b
CY		 2354 else {
2355 if (for_ra)
2356 valid_sum_count += le16_to_cpu(
2357 F2FS_CKPT(sbi)->cur_data_blkoff[i]);
2358 else
2359 valid_sum_count += curseg_blkoff(sbi, i);
2360 }
351df4b2
JK		 2361 }
2362
09cbfeaf 2363 sum_in_page = (PAGE_SIZE - 2 * SUM_JOURNAL_SIZE -
9a47938b
FL		 2364 SUM_FOOTER_SIZE) / SUMMARY_SIZE;
2365 if (valid_sum_count <= sum_in_page)
351df4b2 2366 return 1;
9a47938b 2367 else if ((valid_sum_count - sum_in_page) <=
09cbfeaf 2368 (PAGE_SIZE - SUM_FOOTER_SIZE) / SUMMARY_SIZE)
351df4b2
JK		 2369 return 2;
2370 return 3;
2371}
2372
0a8165d7 2373/*
351df4b2
JK		 2374 * Caller should put this summary page
2375 */
4d57b86d 2376struct page *f2fs_get_sum_page(struct f2fs_sb_info *sbi, unsigned int segno)
351df4b2 2377{
86f33603
JK		 2378 if (unlikely(f2fs_cp_error(sbi)))
2379 return ERR_PTR(-EIO);
2380 return f2fs_get_meta_page_retry(sbi, GET_SUM_BLOCK(sbi, segno));
351df4b2
JK		 2381}
2382
4d57b86d
CY		 2383void f2fs_update_meta_page(struct f2fs_sb_info *sbi,
2384 void *src, block_t blk_addr)
351df4b2 2385{
4d57b86d 2386 struct page *page = f2fs_grab_meta_page(sbi, blk_addr);
381722d2 2387
0537b811 2388 memcpy(page_address(page), src, PAGE_SIZE);
351df4b2
JK		 2389 set_page_dirty(page);
2390 f2fs_put_page(page, 1);
2391}
2392
381722d2
CY		 2393static void write_sum_page(struct f2fs_sb_info *sbi,
2394 struct f2fs_summary_block *sum_blk, block_t blk_addr)
2395{
4d57b86d 2396 f2fs_update_meta_page(sbi, (void *)sum_blk, blk_addr);
381722d2
CY		 2397}
2398
b7ad7512
CY		 2399static void write_current_sum_page(struct f2fs_sb_info *sbi,
2400 int type, block_t blk_addr)
2401{
2402 struct curseg_info *curseg = CURSEG_I(sbi, type);
4d57b86d 2403 struct page *page = f2fs_grab_meta_page(sbi, blk_addr);
b7ad7512
CY		 2404 struct f2fs_summary_block *src = curseg->sum_blk;
2405 struct f2fs_summary_block *dst;
2406
2407 dst = (struct f2fs_summary_block *)page_address(page);
81114baa 2408 memset(dst, 0, PAGE_SIZE);
b7ad7512
CY		 2409
2410 mutex_lock(&curseg->curseg_mutex);
2411
2412 down_read(&curseg->journal_rwsem);
2413 memcpy(&dst->journal, curseg->journal, SUM_JOURNAL_SIZE);
2414 up_read(&curseg->journal_rwsem);
2415
2416 memcpy(dst->entries, src->entries, SUM_ENTRY_SIZE);
2417 memcpy(&dst->footer, &src->footer, SUM_FOOTER_SIZE);
2418
2419 mutex_unlock(&curseg->curseg_mutex);
2420
2421 set_page_dirty(page);
2422 f2fs_put_page(page, 1);
2423}
2424
093749e2
CY		 2425static int is_next_segment_free(struct f2fs_sb_info *sbi,
2426 struct curseg_info *curseg, int type)
a7881893 2427{
a7881893
JK		 2428 unsigned int segno = curseg->segno + 1;
2429 struct free_segmap_info *free_i = FREE_I(sbi);
2430
2431 if (segno < MAIN_SEGS(sbi) && segno % sbi->segs_per_sec)
2432 return !test_bit(segno, free_i->free_segmap);
2433 return 0;
2434}
2435
0a8165d7 2436/*
351df4b2
JK		 2437 * Find a new segment from the free segments bitmap to right order
2438 * This function should be returned with success, otherwise BUG
2439 */
2440static void get_new_segment(struct f2fs_sb_info *sbi,
2441 unsigned int *newseg, bool new_sec, int dir)
2442{
2443 struct free_segmap_info *free_i = FREE_I(sbi);
351df4b2 2444 unsigned int segno, secno, zoneno;
7cd8558b 2445 unsigned int total_zones = MAIN_SECS(sbi) / sbi->secs_per_zone;
4ddb1a4d
JK		 2446 unsigned int hint = GET_SEC_FROM_SEG(sbi, *newseg);
2447 unsigned int old_zoneno = GET_ZONE_FROM_SEG(sbi, *newseg);
351df4b2
JK		 2448 unsigned int left_start = hint;
2449 bool init = true;
2450 int go_left = 0;
2451 int i;
2452
1a118ccf 2453 spin_lock(&free_i->segmap_lock);
351df4b2
JK		 2454
2455 if (!new_sec && ((*newseg + 1) % sbi->segs_per_sec)) {
2456 segno = find_next_zero_bit(free_i->free_segmap,
4ddb1a4d
JK		 2457 GET_SEG_FROM_SEC(sbi, hint + 1), *newseg + 1);
2458 if (segno < GET_SEG_FROM_SEC(sbi, hint + 1))
351df4b2
JK		 2459 goto got_it;
2460 }
2461find_other_zone:
7cd8558b
JK		 2462 secno = find_next_zero_bit(free_i->free_secmap, MAIN_SECS(sbi), hint);
2463 if (secno >= MAIN_SECS(sbi)) {
351df4b2 2464 if (dir == ALLOC_RIGHT) {
b5c7e7ec
YN		 2465 secno = find_first_zero_bit(free_i->free_secmap,
2466 MAIN_SECS(sbi));
7cd8558b 2467 f2fs_bug_on(sbi, secno >= MAIN_SECS(sbi));
351df4b2
JK		 2468 } else {
2469 go_left = 1;
2470 left_start = hint - 1;
2471 }
2472 }
2473 if (go_left == 0)
2474 goto skip_left;
2475
2476 while (test_bit(left_start, free_i->free_secmap)) {
2477 if (left_start > 0) {
2478 left_start--;
2479 continue;
2480 }
b5c7e7ec
YN		 2481 left_start = find_first_zero_bit(free_i->free_secmap,
2482 MAIN_SECS(sbi));
7cd8558b 2483 f2fs_bug_on(sbi, left_start >= MAIN_SECS(sbi));
351df4b2
JK		 2484 break;
2485 }
2486 secno = left_start;
2487skip_left:
4ddb1a4d
JK		 2488 segno = GET_SEG_FROM_SEC(sbi, secno);
2489 zoneno = GET_ZONE_FROM_SEC(sbi, secno);
351df4b2
JK		 2490
2491 /* give up on finding another zone */
2492 if (!init)
2493 goto got_it;
2494 if (sbi->secs_per_zone == 1)
2495 goto got_it;
2496 if (zoneno == old_zoneno)
2497 goto got_it;
2498 if (dir == ALLOC_LEFT) {
2499 if (!go_left && zoneno + 1 >= total_zones)
2500 goto got_it;
2501 if (go_left && zoneno == 0)
2502 goto got_it;
2503 }
2504 for (i = 0; i < NR_CURSEG_TYPE; i++)
2505 if (CURSEG_I(sbi, i)->zone == zoneno)
2506 break;
2507
2508 if (i < NR_CURSEG_TYPE) {
2509 /* zone is in user, try another */
2510 if (go_left)
2511 hint = zoneno * sbi->secs_per_zone - 1;
2512 else if (zoneno + 1 >= total_zones)
2513 hint = 0;
2514 else
2515 hint = (zoneno + 1) * sbi->secs_per_zone;
2516 init = false;
2517 goto find_other_zone;
2518 }
2519got_it:
2520 /* set it as dirty segment in free segmap */
9850cf4a 2521 f2fs_bug_on(sbi, test_bit(segno, free_i->free_segmap));
351df4b2
JK		 2522 __set_inuse(sbi, segno);
2523 *newseg = segno;
1a118ccf 2524 spin_unlock(&free_i->segmap_lock);
351df4b2
JK		 2525}
2526
2527static void reset_curseg(struct f2fs_sb_info *sbi, int type, int modified)
2528{
2529 struct curseg_info *curseg = CURSEG_I(sbi, type);
2530 struct summary_footer *sum_footer;
093749e2 2531 unsigned short seg_type = curseg->seg_type;
351df4b2 2532
d0b9e42a 2533 curseg->inited = true;
351df4b2 2534 curseg->segno = curseg->next_segno;
4ddb1a4d 2535 curseg->zone = GET_ZONE_FROM_SEG(sbi, curseg->segno);
351df4b2
JK		 2536 curseg->next_blkoff = 0;
2537 curseg->next_segno = NULL_SEGNO;
2538
2539 sum_footer = &(curseg->sum_blk->footer);
2540 memset(sum_footer, 0, sizeof(struct summary_footer));
093749e2
CY		 2541
2542 sanity_check_seg_type(sbi, seg_type);
2543
2544 if (IS_DATASEG(seg_type))
351df4b2 2545 SET_SUM_TYPE(sum_footer, SUM_TYPE_DATA);
093749e2 2546 if (IS_NODESEG(seg_type))
351df4b2 2547 SET_SUM_TYPE(sum_footer, SUM_TYPE_NODE);
093749e2 2548 __set_sit_entry_type(sbi, seg_type, curseg->segno, modified);
351df4b2
JK		 2549}
2550
7a20b8a6
JK		 2551static unsigned int __get_next_segno(struct f2fs_sb_info *sbi, int type)
2552{
d0b9e42a 2553 struct curseg_info *curseg = CURSEG_I(sbi, type);
093749e2
CY		 2554 unsigned short seg_type = curseg->seg_type;
2555
2556 sanity_check_seg_type(sbi, seg_type);
6691d940 2557 if (f2fs_need_rand_seg(sbi))
8032bf12 2558 return get_random_u32_below(MAIN_SECS(sbi) * sbi->segs_per_sec);
d0b9e42a 2559
a7881893 2560 /* if segs_per_sec is large than 1, we need to keep original policy. */
2c70c5e3 2561 if (__is_large_section(sbi))
d0b9e42a
CY		 2562 return curseg->segno;
2563
2564 /* inmem log may not locate on any segment after mount */
2565 if (!curseg->inited)
2566 return 0;
a7881893 2567
4354994f
DR		 2568 if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
2569 return 0;
2570
b94929d9 2571 if (test_opt(sbi, NOHEAP) &&
093749e2 2572 (seg_type == CURSEG_HOT_DATA || IS_NODESEG(seg_type)))
7a20b8a6
JK		 2573 return 0;
2574
e066b83c
JK		 2575 if (SIT_I(sbi)->last_victim[ALLOC_NEXT])
2576 return SIT_I(sbi)->last_victim[ALLOC_NEXT];
07939627
JK		 2577
2578 /* find segments from 0 to reuse freed segments */
63189b78 2579 if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_REUSE)
07939627
JK		 2580 return 0;
2581
d0b9e42a 2582 return curseg->segno;
7a20b8a6
JK		 2583}
2584
0a8165d7 2585/*
351df4b2
JK		 2586 * Allocate a current working segment.
2587 * This function always allocates a free segment in LFS manner.
2588 */
2589static void new_curseg(struct f2fs_sb_info *sbi, int type, bool new_sec)
2590{
2591 struct curseg_info *curseg = CURSEG_I(sbi, type);
d0b9e42a 2592 unsigned short seg_type = curseg->seg_type;
351df4b2
JK		 2593 unsigned int segno = curseg->segno;
2594 int dir = ALLOC_LEFT;
2595
d0b9e42a
CY		 2596 if (curseg->inited)
2597 write_sum_page(sbi, curseg->sum_blk,
81fb5e87 2598 GET_SUM_BLOCK(sbi, segno));
d0b9e42a 2599 if (seg_type == CURSEG_WARM_DATA || seg_type == CURSEG_COLD_DATA)
351df4b2
JK		 2600 dir = ALLOC_RIGHT;
2601
2602 if (test_opt(sbi, NOHEAP))
2603 dir = ALLOC_RIGHT;
2604
7a20b8a6 2605 segno = __get_next_segno(sbi, type);
351df4b2
JK		 2606 get_new_segment(sbi, &segno, new_sec, dir);
2607 curseg->next_segno = segno;
2608 reset_curseg(sbi, type, 1);
2609 curseg->alloc_type = LFS;
6691d940
DJ		 2610 if (F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_BLK)
2611 curseg->fragment_remained_chunk =
e8a533cb 2612 get_random_u32_inclusive(1, sbi->max_fragment_chunk);
351df4b2
JK		 2613}
2614
453e2ff8
CY		 2615static int __next_free_blkoff(struct f2fs_sb_info *sbi,
2616 int segno, block_t start)
351df4b2 2617{
453e2ff8 2618 struct seg_entry *se = get_seg_entry(sbi, segno);
e81c93cf 2619 int entries = SIT_VBLOCK_MAP_SIZE / sizeof(unsigned long);
60a3b782 2620 unsigned long *target_map = SIT_I(sbi)->tmp_map;
e81c93cf
CL		 2621 unsigned long *ckpt_map = (unsigned long *)se->ckpt_valid_map;
2622 unsigned long *cur_map = (unsigned long *)se->cur_valid_map;
453e2ff8 2623 int i;
e81c93cf
CL		 2624
2625 for (i = 0; i < entries; i++)
2626 target_map[i] = ckpt_map[i] | cur_map[i];
2627
453e2ff8 2628 return __find_rev_next_zero_bit(target_map, sbi->blocks_per_seg, start);
351df4b2
JK		 2629}
2630
0a8165d7 2631/*
351df4b2
JK		 2632 * If a segment is written by LFS manner, next block offset is just obtained
2633 * by increasing the current block offset. However, if a segment is written by
2634 * SSR manner, next block offset obtained by calling __next_free_blkoff
2635 */
2636static void __refresh_next_blkoff(struct f2fs_sb_info *sbi,
2637 struct curseg_info *seg)
2638{
6691d940 2639 if (seg->alloc_type == SSR) {
453e2ff8
CY		 2640 seg->next_blkoff =
2641 __next_free_blkoff(sbi, seg->segno,
2642 seg->next_blkoff + 1);
6691d940 2643 } else {
351df4b2 2644 seg->next_blkoff++;
6691d940
DJ		 2645 if (F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_BLK) {
2646 /* To allocate block chunks in different sizes, use random number */
2647 if (--seg->fragment_remained_chunk <= 0) {
2648 seg->fragment_remained_chunk =
e8a533cb 2649 get_random_u32_inclusive(1, sbi->max_fragment_chunk);
6691d940 2650 seg->next_blkoff +=
e8a533cb 2651 get_random_u32_inclusive(1, sbi->max_fragment_hole);
6691d940
DJ		 2652 }
2653 }
2654 }
351df4b2
JK		 2655}
2656
61461fc9
CY		 2657bool f2fs_segment_has_free_slot(struct f2fs_sb_info *sbi, int segno)
2658{
453e2ff8 2659 return __next_free_blkoff(sbi, segno, 0) < sbi->blocks_per_seg;
61461fc9
CY		 2660}
2661
0a8165d7 2662/*
e1c42045 2663 * This function always allocates a used segment(from dirty seglist) by SSR
351df4b2
JK		 2664 * manner, so it should recover the existing segment information of valid blocks
2665 */
5bcd655f 2666static void change_curseg(struct f2fs_sb_info *sbi, int type)
351df4b2
JK		 2667{
2668 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
2669 struct curseg_info *curseg = CURSEG_I(sbi, type);
2670 unsigned int new_segno = curseg->next_segno;
2671 struct f2fs_summary_block *sum_node;
2672 struct page *sum_page;
2673
5bcd655f 2674 write_sum_page(sbi, curseg->sum_blk, GET_SUM_BLOCK(sbi, curseg->segno));
093749e2 2675
351df4b2
JK		 2676 __set_test_and_inuse(sbi, new_segno);
2677
2678 mutex_lock(&dirty_i->seglist_lock);
2679 __remove_dirty_segment(sbi, new_segno, PRE);
2680 __remove_dirty_segment(sbi, new_segno, DIRTY);
2681 mutex_unlock(&dirty_i->seglist_lock);
2682
2683 reset_curseg(sbi, type, 1);
2684 curseg->alloc_type = SSR;
453e2ff8 2685 curseg->next_blkoff = __next_free_blkoff(sbi, curseg->segno, 0);
351df4b2 2686
4d57b86d 2687 sum_page = f2fs_get_sum_page(sbi, new_segno);
86f33603
JK		 2688 if (IS_ERR(sum_page)) {
2689 /* GC won't be able to use stale summary pages by cp_error */
2690 memset(curseg->sum_blk, 0, SUM_ENTRY_SIZE);
2691 return;
2692 }
025d63a4
CY		 2693 sum_node = (struct f2fs_summary_block *)page_address(sum_page);
2694 memcpy(curseg->sum_blk, sum_node, SUM_ENTRY_SIZE);
2695 f2fs_put_page(sum_page, 1);
351df4b2
JK		 2696}
2697
093749e2
CY		 2698static int get_ssr_segment(struct f2fs_sb_info *sbi, int type,
2699 int alloc_mode, unsigned long long age);
2700
2701static void get_atssr_segment(struct f2fs_sb_info *sbi, int type,
2702 int target_type, int alloc_mode,
2703 unsigned long long age)
2704{
2705 struct curseg_info *curseg = CURSEG_I(sbi, type);
2706
2707 curseg->seg_type = target_type;
2708
2709 if (get_ssr_segment(sbi, type, alloc_mode, age)) {
2710 struct seg_entry *se = get_seg_entry(sbi, curseg->next_segno);
2711
2712 curseg->seg_type = se->type;
5bcd655f 2713 change_curseg(sbi, type);
093749e2
CY		 2714 } else {
2715 /* allocate cold segment by default */
2716 curseg->seg_type = CURSEG_COLD_DATA;
2717 new_curseg(sbi, type, true);
2718 }
2719 stat_inc_seg_type(sbi, curseg);
2720}
2721
2722static void __f2fs_init_atgc_curseg(struct f2fs_sb_info *sbi)
2723{
2724 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_ALL_DATA_ATGC);
2725
2726 if (!sbi->am.atgc_enabled)
2727 return;
2728
e4544b63 2729 f2fs_down_read(&SM_I(sbi)->curseg_lock);
093749e2
CY		 2730
2731 mutex_lock(&curseg->curseg_mutex);
2732 down_write(&SIT_I(sbi)->sentry_lock);
2733
2734 get_atssr_segment(sbi, CURSEG_ALL_DATA_ATGC, CURSEG_COLD_DATA, SSR, 0);
2735
2736 up_write(&SIT_I(sbi)->sentry_lock);
2737 mutex_unlock(&curseg->curseg_mutex);
2738
e4544b63 2739 f2fs_up_read(&SM_I(sbi)->curseg_lock);
093749e2
CY		 2740
2741}
2742void f2fs_init_inmem_curseg(struct f2fs_sb_info *sbi)
2743{
2744 __f2fs_init_atgc_curseg(sbi);
2745}
2746
2747static void __f2fs_save_inmem_curseg(struct f2fs_sb_info *sbi, int type)
d0b9e42a
CY		 2748{
2749 struct curseg_info *curseg = CURSEG_I(sbi, type);
2750
2751 mutex_lock(&curseg->curseg_mutex);
2752 if (!curseg->inited)
2753 goto out;
2754
2755 if (get_valid_blocks(sbi, curseg->segno, false)) {
2756 write_sum_page(sbi, curseg->sum_blk,
2757 GET_SUM_BLOCK(sbi, curseg->segno));
2758 } else {
2759 mutex_lock(&DIRTY_I(sbi)->seglist_lock);
2760 __set_test_and_free(sbi, curseg->segno, true);
2761 mutex_unlock(&DIRTY_I(sbi)->seglist_lock);
2762 }
2763out:
2764 mutex_unlock(&curseg->curseg_mutex);
2765}
2766
093749e2
CY		 2767void f2fs_save_inmem_curseg(struct f2fs_sb_info *sbi)
2768{
2769 __f2fs_save_inmem_curseg(sbi, CURSEG_COLD_DATA_PINNED);
2770
2771 if (sbi->am.atgc_enabled)
2772 __f2fs_save_inmem_curseg(sbi, CURSEG_ALL_DATA_ATGC);
2773}
2774
2775static void __f2fs_restore_inmem_curseg(struct f2fs_sb_info *sbi, int type)
d0b9e42a
CY		 2776{
2777 struct curseg_info *curseg = CURSEG_I(sbi, type);
2778
2779 mutex_lock(&curseg->curseg_mutex);
2780 if (!curseg->inited)
2781 goto out;
2782 if (get_valid_blocks(sbi, curseg->segno, false))
2783 goto out;
2784
2785 mutex_lock(&DIRTY_I(sbi)->seglist_lock);
2786 __set_test_and_inuse(sbi, curseg->segno);
2787 mutex_unlock(&DIRTY_I(sbi)->seglist_lock);
2788out:
2789 mutex_unlock(&curseg->curseg_mutex);
2790}
2791
093749e2
CY		 2792void f2fs_restore_inmem_curseg(struct f2fs_sb_info *sbi)
2793{
2794 __f2fs_restore_inmem_curseg(sbi, CURSEG_COLD_DATA_PINNED);
2795
2796 if (sbi->am.atgc_enabled)
2797 __f2fs_restore_inmem_curseg(sbi, CURSEG_ALL_DATA_ATGC);
2798}
2799
2800static int get_ssr_segment(struct f2fs_sb_info *sbi, int type,
2801 int alloc_mode, unsigned long long age)
43727527
JK		 2802{
2803 struct curseg_info *curseg = CURSEG_I(sbi, type);
2804 const struct victim_selection *v_ops = DIRTY_I(sbi)->v_ops;
e066b83c 2805 unsigned segno = NULL_SEGNO;
093749e2 2806 unsigned short seg_type = curseg->seg_type;
d27c3d89
CY		 2807 int i, cnt;
2808 bool reversed = false;
c192f7a4 2809
093749e2
CY		 2810 sanity_check_seg_type(sbi, seg_type);
2811
4d57b86d 2812 /* f2fs_need_SSR() already forces to do this */
093749e2 2813 if (!v_ops->get_victim(sbi, &segno, BG_GC, seg_type, alloc_mode, age)) {
e066b83c 2814 curseg->next_segno = segno;
c192f7a4 2815 return 1;
e066b83c 2816 }
43727527 2817
70d625cb 2818 /* For node segments, let's do SSR more intensively */
093749e2
CY		 2819 if (IS_NODESEG(seg_type)) {
2820 if (seg_type >= CURSEG_WARM_NODE) {
d27c3d89
CY		 2821 reversed = true;
2822 i = CURSEG_COLD_NODE;
2823 } else {
2824 i = CURSEG_HOT_NODE;
2825 }
2826 cnt = NR_CURSEG_NODE_TYPE;
70d625cb 2827 } else {
093749e2 2828 if (seg_type >= CURSEG_WARM_DATA) {
d27c3d89
CY		 2829 reversed = true;
2830 i = CURSEG_COLD_DATA;
2831 } else {
2832 i = CURSEG_HOT_DATA;
2833 }
2834 cnt = NR_CURSEG_DATA_TYPE;
70d625cb 2835 }
43727527 2836
d27c3d89 2837 for (; cnt-- > 0; reversed ? i-- : i++) {
093749e2 2838 if (i == seg_type)
c192f7a4 2839 continue;
093749e2 2840 if (!v_ops->get_victim(sbi, &segno, BG_GC, i, alloc_mode, age)) {
e066b83c 2841 curseg->next_segno = segno;
43727527 2842 return 1;
e066b83c 2843 }
c192f7a4 2844 }
4354994f
DR		 2845
2846 /* find valid_blocks=0 in dirty list */
2847 if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
2848 segno = get_free_segment(sbi);
2849 if (segno != NULL_SEGNO) {
2850 curseg->next_segno = segno;
2851 return 1;
2852 }
2853 }
43727527
JK		 2854 return 0;
2855}
2856
8442d94b 2857static bool need_new_seg(struct f2fs_sb_info *sbi, int type)
351df4b2 2858{
a7881893
JK		 2859 struct curseg_info *curseg = CURSEG_I(sbi, type);
2860
8442d94b
CH		 2861 if (!is_set_ckpt_flags(sbi, CP_CRC_RECOVERY_FLAG) &&
2862 curseg->seg_type == CURSEG_WARM_NODE)
2863 return true;
2864 if (curseg->alloc_type == LFS &&
2865 is_next_segment_free(sbi, curseg, type) &&
2866 likely(!is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
2867 return true;
2868 if (!f2fs_need_SSR(sbi) || !get_ssr_segment(sbi, type, SSR, 0))
2869 return true;
2870 return false;
351df4b2
JK		 2871}
2872
0ef81833 2873void f2fs_allocate_segment_for_resize(struct f2fs_sb_info *sbi, int type,
04f0b2ea
QS		 2874 unsigned int start, unsigned int end)
2875{
2876 struct curseg_info *curseg = CURSEG_I(sbi, type);
2877 unsigned int segno;
2878
e4544b63 2879 f2fs_down_read(&SM_I(sbi)->curseg_lock);
04f0b2ea
QS		 2880 mutex_lock(&curseg->curseg_mutex);
2881 down_write(&SIT_I(sbi)->sentry_lock);
2882
2883 segno = CURSEG_I(sbi, type)->segno;
2884 if (segno < start || segno > end)
2885 goto unlock;
2886
093749e2 2887 if (f2fs_need_SSR(sbi) && get_ssr_segment(sbi, type, SSR, 0))
5bcd655f 2888 change_curseg(sbi, type);
04f0b2ea
QS		 2889 else
2890 new_curseg(sbi, type, true);
2891
2892 stat_inc_seg_type(sbi, curseg);
2893
2894 locate_dirty_segment(sbi, segno);
2895unlock:
2896 up_write(&SIT_I(sbi)->sentry_lock);
2897
2898 if (segno != curseg->segno)
dcbb4c10
JP		 2899 f2fs_notice(sbi, "For resize: curseg of type %d: %u ==> %u",
2900 type, segno, curseg->segno);
04f0b2ea
QS		 2901
2902 mutex_unlock(&curseg->curseg_mutex);
e4544b63 2903 f2fs_up_read(&SM_I(sbi)->curseg_lock);
04f0b2ea
QS		 2904}
2905
e1175f02 2906static void __allocate_new_segment(struct f2fs_sb_info *sbi, int type,
509f1010 2907 bool new_sec, bool force)
351df4b2 2908{
901d745f 2909 struct curseg_info *curseg = CURSEG_I(sbi, type);
6ae1be13 2910 unsigned int old_segno;
351df4b2 2911
d0b9e42a
CY		 2912 if (!curseg->inited)
2913 goto alloc;
2914
509f1010 2915 if (force || curseg->next_blkoff ||
e1175f02
CY		 2916 get_valid_blocks(sbi, curseg->segno, new_sec))
2917 goto alloc;
3d26fa6b 2918
61461fc9
CY		 2919 if (!get_ckpt_valid_blocks(sbi, curseg->segno, new_sec))
2920 return;
d0b9e42a 2921alloc:
901d745f 2922 old_segno = curseg->segno;
8442d94b
CH		 2923 new_curseg(sbi, type, true);
2924 stat_inc_seg_type(sbi, curseg);
901d745f
CY		 2925 locate_dirty_segment(sbi, old_segno);
2926}
f5a53edc 2927
509f1010
CY		 2928static void __allocate_new_section(struct f2fs_sb_info *sbi,
2929 int type, bool force)
e1175f02 2930{
509f1010 2931 __allocate_new_segment(sbi, type, true, force);
e1175f02
CY		 2932}
2933
509f1010 2934void f2fs_allocate_new_section(struct f2fs_sb_info *sbi, int type, bool force)
901d745f 2935{
e4544b63 2936 f2fs_down_read(&SM_I(sbi)->curseg_lock);
901d745f 2937 down_write(&SIT_I(sbi)->sentry_lock);
509f1010 2938 __allocate_new_section(sbi, type, force);
901d745f 2939 up_write(&SIT_I(sbi)->sentry_lock);
e4544b63 2940 f2fs_up_read(&SM_I(sbi)->curseg_lock);
901d745f 2941}
3d26fa6b 2942
901d745f
CY		 2943void f2fs_allocate_new_segments(struct f2fs_sb_info *sbi)
2944{
2945 int i;
2946
e4544b63 2947 f2fs_down_read(&SM_I(sbi)->curseg_lock);
901d745f
CY		 2948 down_write(&SIT_I(sbi)->sentry_lock);
2949 for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++)
509f1010 2950 __allocate_new_segment(sbi, i, false, false);
3d26fa6b 2951 up_write(&SIT_I(sbi)->sentry_lock);
e4544b63 2952 f2fs_up_read(&SM_I(sbi)->curseg_lock);
351df4b2
JK		 2953}
2954
4d57b86d
CY		 2955bool f2fs_exist_trim_candidates(struct f2fs_sb_info *sbi,
2956 struct cp_control *cpc)
25290fa5
JK		 2957{
2958 __u64 trim_start = cpc->trim_start;
2959 bool has_candidate = false;
2960
3d26fa6b 2961 down_write(&SIT_I(sbi)->sentry_lock);
25290fa5
JK		 2962 for (; cpc->trim_start <= cpc->trim_end; cpc->trim_start++) {
2963 if (add_discard_addrs(sbi, cpc, true)) {
2964 has_candidate = true;
2965 break;
2966 }
2967 }
3d26fa6b 2968 up_write(&SIT_I(sbi)->sentry_lock);
25290fa5
JK		 2969
2970 cpc->trim_start = trim_start;
2971 return has_candidate;
2972}
2973
01f9cf6d 2974static unsigned int __issue_discard_cmd_range(struct f2fs_sb_info *sbi,
9a997188
JK		 2975 struct discard_policy *dpolicy,
2976 unsigned int start, unsigned int end)
2977{
2978 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
2979 struct discard_cmd *prev_dc = NULL, *next_dc = NULL;
2980 struct rb_node **insert_p = NULL, *insert_parent = NULL;
2981 struct discard_cmd *dc;
2982 struct blk_plug plug;
2983 int issued;
01f9cf6d 2984 unsigned int trimmed = 0;
9a997188
JK		 2985
2986next:
2987 issued = 0;
2988
2989 mutex_lock(&dcc->cmd_lock);
67fce70b
CY		 2990 if (unlikely(dcc->rbtree_check))
2991 f2fs_bug_on(sbi, !f2fs_check_rb_tree_consistence(sbi,
2e9b2bb2 2992 &dcc->root, false));
9a997188 2993
4d57b86d 2994 dc = (struct discard_cmd *)f2fs_lookup_rb_tree_ret(&dcc->root,
9a997188
JK		 2995 NULL, start,
2996 (struct rb_entry **)&prev_dc,
2997 (struct rb_entry **)&next_dc,
4dada3fd 2998 &insert_p, &insert_parent, true, NULL);
9a997188
JK		 2999 if (!dc)
3000 dc = next_dc;
3001
3002 blk_start_plug(&plug);
3003
3004 while (dc && dc->lstart <= end) {
3005 struct rb_node *node;
6b9cb124 3006 int err = 0;
9a997188
JK		 3007
3008 if (dc->len < dpolicy->granularity)
3009 goto skip;
3010
3011 if (dc->state != D_PREP) {
3012 list_move_tail(&dc->list, &dcc->fstrim_list);
3013 goto skip;
3014 }
3015
6b9cb124 3016 err = __submit_discard_cmd(sbi, dpolicy, dc, &issued);
9a997188 3017
35ec7d57 3018 if (issued >= dpolicy->max_requests) {
9a997188
JK		 3019 start = dc->lstart + dc->len;
3020
6b9cb124
CY		 3021 if (err)
3022 __remove_discard_cmd(sbi, dc);
3023
9a997188
JK		 3024 blk_finish_plug(&plug);
3025 mutex_unlock(&dcc->cmd_lock);
01f9cf6d 3026 trimmed += __wait_all_discard_cmd(sbi, NULL);
a64239d0 3027 f2fs_io_schedule_timeout(DEFAULT_IO_TIMEOUT);
9a997188
JK		 3028 goto next;
3029 }
3030skip:
3031 node = rb_next(&dc->rb_node);
6b9cb124
CY		 3032 if (err)
3033 __remove_discard_cmd(sbi, dc);
9a997188
JK		 3034 dc = rb_entry_safe(node, struct discard_cmd, rb_node);
3035
3036 if (fatal_signal_pending(current))
3037 break;
3038 }
3039
3040 blk_finish_plug(&plug);
3041 mutex_unlock(&dcc->cmd_lock);
01f9cf6d
CY		 3042
3043 return trimmed;
9a997188
JK		 3044}
3045
4b2fecc8
JK		 3046int f2fs_trim_fs(struct f2fs_sb_info *sbi, struct fstrim_range *range)
3047{
f7ef9b83
JK		 3048 __u64 start = F2FS_BYTES_TO_BLK(range->start);
3049 __u64 end = start + F2FS_BYTES_TO_BLK(range->len) - 1;
377224c4 3050 unsigned int start_segno, end_segno;
8412663d 3051 block_t start_block, end_block;
4b2fecc8 3052 struct cp_control cpc;
78997b56 3053 struct discard_policy dpolicy;
0ea80512 3054 unsigned long long trimmed = 0;
c34f42e2 3055 int err = 0;
b0332a0f 3056 bool need_align = f2fs_lfs_mode(sbi) && __is_large_section(sbi);
4b2fecc8 3057
836b5a63 3058 if (start >= MAX_BLKADDR(sbi) || range->len < sbi->blocksize)
4b2fecc8
JK		 3059 return -EINVAL;
3060
3f16ecd9
CY		 3061 if (end < MAIN_BLKADDR(sbi))
3062 goto out;
4b2fecc8 3063
ed214a11 3064 if (is_sbi_flag_set(sbi, SBI_NEED_FSCK)) {
dcbb4c10 3065 f2fs_warn(sbi, "Found FS corruption, run fsck to fix.");
10f966bb 3066 return -EFSCORRUPTED;
ed214a11
YH		 3067 }
3068
4b2fecc8 3069 /* start/end segment number in main_area */
7cd8558b
JK		 3070 start_segno = (start <= MAIN_BLKADDR(sbi)) ? 0 : GET_SEGNO(sbi, start);
3071 end_segno = (end >= MAX_BLKADDR(sbi)) ? MAIN_SEGS(sbi) - 1 :
3072 GET_SEGNO(sbi, end);
ad6672bb
YS		 3073 if (need_align) {
3074 start_segno = rounddown(start_segno, sbi->segs_per_sec);
3075 end_segno = roundup(end_segno + 1, sbi->segs_per_sec) - 1;
3076 }
8412663d 3077
4b2fecc8 3078 cpc.reason = CP_DISCARD;
836b5a63 3079 cpc.trim_minlen = max_t(__u64, 1, F2FS_BYTES_TO_BLK(range->minlen));
377224c4
CY		 3080 cpc.trim_start = start_segno;
3081 cpc.trim_end = end_segno;
4b2fecc8 3082
377224c4
CY		 3083 if (sbi->discard_blks == 0)
3084 goto out;
74fa5f3d 3085
e4544b63 3086 f2fs_down_write(&sbi->gc_lock);
4d57b86d 3087 err = f2fs_write_checkpoint(sbi, &cpc);
e4544b63 3088 f2fs_up_write(&sbi->gc_lock);
377224c4
CY		 3089 if (err)
3090 goto out;
8412663d 3091
e555da9f
JK		 3092 /*
3093 * We filed discard candidates, but actually we don't need to wait for
3094 * all of them, since they'll be issued in idle time along with runtime
3095 * discard option. User configuration looks like using runtime discard
3096 * or periodic fstrim instead of it.
3097 */
7d20c8ab 3098 if (f2fs_realtime_discard_enable(sbi))
5a615492
JK		 3099 goto out;
3100
3101 start_block = START_BLOCK(sbi, start_segno);
3102 end_block = START_BLOCK(sbi, end_segno + 1);
3103
3104 __init_discard_policy(sbi, &dpolicy, DPOLICY_FSTRIM, cpc.trim_minlen);
01f9cf6d
CY		 3105 trimmed = __issue_discard_cmd_range(sbi, &dpolicy,
3106 start_block, end_block);
5a615492 3107
01f9cf6d 3108 trimmed += __wait_discard_cmd_range(sbi, &dpolicy,
0ea80512 3109 start_block, end_block);
377224c4 3110out:
6eae2694
CY		 3111 if (!err)
3112 range->len = F2FS_BLK_TO_BYTES(trimmed);
c34f42e2 3113 return err;
4b2fecc8
JK		 3114}
3115
093749e2
CY		 3116static bool __has_curseg_space(struct f2fs_sb_info *sbi,
3117 struct curseg_info *curseg)
351df4b2 3118{
de881df9
AR		 3119 return curseg->next_blkoff < f2fs_usable_blks_in_seg(sbi,
3120 curseg->segno);
351df4b2
JK		 3121}
3122
4d57b86d 3123int f2fs_rw_hint_to_seg_type(enum rw_hint hint)
4f0a03d3
HL		 3124{
3125 switch (hint) {
3126 case WRITE_LIFE_SHORT:
3127 return CURSEG_HOT_DATA;
3128 case WRITE_LIFE_EXTREME:
3129 return CURSEG_COLD_DATA;
3130 default:
3131 return CURSEG_WARM_DATA;
3132 }
3133}
3134
81377bd6 3135static int __get_segment_type_2(struct f2fs_io_info *fio)
351df4b2 3136{
81377bd6 3137 if (fio->type == DATA)
351df4b2
JK		 3138 return CURSEG_HOT_DATA;
3139 else
3140 return CURSEG_HOT_NODE;
3141}
3142
81377bd6 3143static int __get_segment_type_4(struct f2fs_io_info *fio)
351df4b2 3144{
81377bd6
JK		 3145 if (fio->type == DATA) {
3146 struct inode *inode = fio->page->mapping->host;
351df4b2
JK		 3147
3148 if (S_ISDIR(inode->i_mode))
3149 return CURSEG_HOT_DATA;
3150 else
3151 return CURSEG_COLD_DATA;
3152 } else {
81377bd6 3153 if (IS_DNODE(fio->page) && is_cold_node(fio->page))
a344b9fd 3154 return CURSEG_WARM_NODE;
351df4b2
JK		 3155 else
3156 return CURSEG_COLD_NODE;
3157 }
3158}
3159
71644dff
JK		 3160static int __get_age_segment_type(struct inode *inode, pgoff_t pgofs)
3161{
3162 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
fe59109a 3163 struct extent_info ei = {};
71644dff
JK		 3164
3165 if (f2fs_lookup_age_extent_cache(inode, pgofs, &ei)) {
3166 if (!ei.age)
3167 return NO_CHECK_TYPE;
3168 if (ei.age <= sbi->hot_data_age_threshold)
3169 return CURSEG_HOT_DATA;
3170 if (ei.age <= sbi->warm_data_age_threshold)
3171 return CURSEG_WARM_DATA;
3172 return CURSEG_COLD_DATA;
3173 }
3174 return NO_CHECK_TYPE;
3175}
3176
81377bd6 3177static int __get_segment_type_6(struct f2fs_io_info *fio)
351df4b2 3178{
81377bd6
JK		 3179 if (fio->type == DATA) {
3180 struct inode *inode = fio->page->mapping->host;
71644dff 3181 int type;
351df4b2 3182
859fca6b
CY		 3183 if (is_inode_flag_set(inode, FI_ALIGNED_WRITE))
3184 return CURSEG_COLD_DATA_PINNED;
3185
b763f3be 3186 if (page_private_gcing(fio->page)) {
ac2d750b
WG		 3187 if (fio->sbi->am.atgc_enabled &&
3188 (fio->io_type == FS_DATA_IO) &&
3189 (fio->sbi->gc_mode != GC_URGENT_HIGH))
093749e2
CY		 3190 return CURSEG_ALL_DATA_ATGC;
3191 else
3192 return CURSEG_COLD_DATA;
3193 }
602a16d5 3194 if (file_is_cold(inode) || f2fs_need_compress_data(inode))
351df4b2 3195 return CURSEG_COLD_DATA;
71644dff
JK		 3196
3197 type = __get_age_segment_type(inode, fio->page->index);
3198 if (type != NO_CHECK_TYPE)
3199 return type;
3200
b6a06cbb 3201 if (file_is_hot(inode) ||
b4c3ca8b 3202 is_inode_flag_set(inode, FI_HOT_DATA) ||
4a2c5b79 3203 f2fs_is_cow_file(inode))
ef095d19 3204 return CURSEG_HOT_DATA;
4d57b86d 3205 return f2fs_rw_hint_to_seg_type(inode->i_write_hint);
351df4b2 3206 } else {
81377bd6
JK		 3207 if (IS_DNODE(fio->page))
3208 return is_cold_node(fio->page) ? CURSEG_WARM_NODE :
351df4b2 3209 CURSEG_HOT_NODE;
ef095d19 3210 return CURSEG_COLD_NODE;
351df4b2
JK		 3211 }
3212}
3213
81377bd6 3214static int __get_segment_type(struct f2fs_io_info *fio)
351df4b2 3215{
a912b54d
JK		 3216 int type = 0;
3217
63189b78 3218 switch (F2FS_OPTION(fio->sbi).active_logs) {
351df4b2 3219 case 2:
a912b54d
JK		 3220 type = __get_segment_type_2(fio);
3221 break;
351df4b2 3222 case 4:
a912b54d
JK		 3223 type = __get_segment_type_4(fio);
3224 break;
3225 case 6:
3226 type = __get_segment_type_6(fio);
3227 break;
3228 default:
3229 f2fs_bug_on(fio->sbi, true);
351df4b2 3230 }
81377bd6 3231
a912b54d
JK		 3232 if (IS_HOT(type))
3233 fio->temp = HOT;
3234 else if (IS_WARM(type))
3235 fio->temp = WARM;
3236 else
3237 fio->temp = COLD;
3238 return type;
351df4b2
JK		 3239}
3240
4d57b86d 3241void f2fs_allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
bfad7c2d 3242 block_t old_blkaddr, block_t *new_blkaddr,
fb830fc5 3243 struct f2fs_summary *sum, int type,
093749e2 3244 struct f2fs_io_info *fio)
351df4b2
JK		 3245{
3246 struct sit_info *sit_i = SIT_I(sbi);
6ae1be13 3247 struct curseg_info *curseg = CURSEG_I(sbi, type);
c5d02785 3248 unsigned long long old_mtime;
093749e2
CY		 3249 bool from_gc = (type == CURSEG_ALL_DATA_ATGC);
3250 struct seg_entry *se = NULL;
351df4b2 3251
e4544b63 3252 f2fs_down_read(&SM_I(sbi)->curseg_lock);
2b60311d 3253
351df4b2 3254 mutex_lock(&curseg->curseg_mutex);
3d26fa6b 3255 down_write(&sit_i->sentry_lock);
351df4b2 3256
093749e2
CY		 3257 if (from_gc) {
3258 f2fs_bug_on(sbi, GET_SEGNO(sbi, old_blkaddr) == NULL_SEGNO);
3259 se = get_seg_entry(sbi, GET_SEGNO(sbi, old_blkaddr));
3260 sanity_check_seg_type(sbi, se->type);
3261 f2fs_bug_on(sbi, IS_NODESEG(se->type));
3262 }
351df4b2 3263 *new_blkaddr = NEXT_FREE_BLKADDR(sbi, curseg);
351df4b2 3264
093749e2
CY		 3265 f2fs_bug_on(sbi, curseg->next_blkoff >= sbi->blocks_per_seg);
3266
4e6a8d9b
JK		 3267 f2fs_wait_discard_bio(sbi, *new_blkaddr);
3268
351df4b2
JK		 3269 /*
3270 * __add_sum_entry should be resided under the curseg_mutex
3271 * because, this function updates a summary entry in the
3272 * current summary block.
3273 */
e79efe3b 3274 __add_sum_entry(sbi, type, sum);
351df4b2 3275
351df4b2 3276 __refresh_next_blkoff(sbi, curseg);
dcdfff65
JK		 3277
3278 stat_inc_block_count(sbi, curseg);
351df4b2 3279
c5d02785
CY		 3280 if (from_gc) {
3281 old_mtime = get_segment_mtime(sbi, old_blkaddr);
3282 } else {
3283 update_segment_mtime(sbi, old_blkaddr, 0);
3284 old_mtime = 0;
3285 }
3286 update_segment_mtime(sbi, *new_blkaddr, old_mtime);
3287
65f1b80b
YS		 3288 /*
3289 * SIT information should be updated before segment allocation,
3290 * since SSR needs latest valid block information.
3291 */
3292 update_sit_entry(sbi, *new_blkaddr, 1);
3293 if (GET_SEGNO(sbi, old_blkaddr) != NULL_SEGNO)
3294 update_sit_entry(sbi, old_blkaddr, -1);
3295
093749e2 3296 if (!__has_curseg_space(sbi, curseg)) {
8442d94b
CH		 3297 /*
3298 * Flush out current segment and replace it with new segment.
3299 */
3300 if (from_gc) {
093749e2
CY		 3301 get_atssr_segment(sbi, type, se->type,
3302 AT_SSR, se->mtime);
8442d94b
CH		 3303 } else {
3304 if (need_new_seg(sbi, type))
3305 new_curseg(sbi, type, false);
3306 else
5bcd655f 3307 change_curseg(sbi, type);
8442d94b
CH		 3308 stat_inc_seg_type(sbi, curseg);
3309 }
093749e2 3310 }
351df4b2 3311 /*
65f1b80b
YS		 3312 * segment dirty status should be updated after segment allocation,
3313 * so we just need to update status only one time after previous
3314 * segment being closed.
351df4b2 3315 */
65f1b80b
YS		 3316 locate_dirty_segment(sbi, GET_SEGNO(sbi, old_blkaddr));
3317 locate_dirty_segment(sbi, GET_SEGNO(sbi, *new_blkaddr));
5e443818 3318
71644dff
JK		 3319 if (IS_DATASEG(type))
3320 atomic64_inc(&sbi->allocated_data_blocks);
3321
3d26fa6b 3322 up_write(&sit_i->sentry_lock);
351df4b2 3323
704956ec 3324 if (page && IS_NODESEG(type)) {
351df4b2
JK		 3325 fill_node_footer_blkaddr(page, NEXT_FREE_BLKADDR(sbi, curseg));
3326
704956ec
CY		 3327 f2fs_inode_chksum_set(sbi, page);
3328 }
3329
f608c38c 3330 if (fio) {
fb830fc5
CY		 3331 struct f2fs_bio_info *io;
3332
25ae837e
CY		 3333 if (F2FS_IO_ALIGNED(sbi))
3334 fio->retry = false;
3335
fb830fc5
CY		 3336 INIT_LIST_HEAD(&fio->list);
3337 fio->in_list = true;
3338 io = sbi->write_io[fio->type] + fio->temp;
3339 spin_lock(&io->io_lock);
3340 list_add_tail(&fio->list, &io->io_list);
3341 spin_unlock(&io->io_lock);
3342 }
3343
bfad7c2d 3344 mutex_unlock(&curseg->curseg_mutex);
2b60311d 3345
e4544b63 3346 f2fs_up_read(&SM_I(sbi)->curseg_lock);
bfad7c2d
JK		 3347}
3348
71f2c820
CY		 3349void f2fs_update_device_state(struct f2fs_sb_info *sbi, nid_t ino,
3350 block_t blkaddr, unsigned int blkcnt)
39d787be 3351{
0916878d 3352 if (!f2fs_is_multi_device(sbi))
39d787be
CY		 3353 return;
3354
71f2c820
CY		 3355 while (1) {
3356 unsigned int devidx = f2fs_target_device_index(sbi, blkaddr);
3357 unsigned int blks = FDEV(devidx).end_blk - blkaddr + 1;
39d787be 3358
71f2c820
CY		 3359 /* update device state for fsync */
3360 f2fs_set_dirty_device(sbi, ino, devidx, FLUSH_INO);
1228b482 3361
71f2c820
CY		 3362 /* update device state for checkpoint */
3363 if (!f2fs_test_bit(devidx, (char *)&sbi->dirty_device)) {
3364 spin_lock(&sbi->dev_lock);
3365 f2fs_set_bit(devidx, (char *)&sbi->dirty_device);
3366 spin_unlock(&sbi->dev_lock);
3367 }
3368
3369 if (blkcnt <= blks)
3370 break;
3371 blkcnt -= blks;
3372 blkaddr += blks;
1228b482 3373 }
39d787be
CY		 3374}
3375
05ca3632 3376static void do_write_page(struct f2fs_summary *sum, struct f2fs_io_info *fio)
bfad7c2d 3377{
81377bd6 3378 int type = __get_segment_type(fio);
b0332a0f 3379 bool keep_order = (f2fs_lfs_mode(fio->sbi) && type == CURSEG_COLD_DATA);
bfad7c2d 3380
107a805d 3381 if (keep_order)
e4544b63 3382 f2fs_down_read(&fio->sbi->io_order_lock);
0a595eba 3383reallocate:
4d57b86d 3384 f2fs_allocate_data_block(fio->sbi, fio->page, fio->old_blkaddr,
093749e2 3385 &fio->new_blkaddr, sum, type, fio);
6ce19aff 3386 if (GET_SEGNO(fio->sbi, fio->old_blkaddr) != NULL_SEGNO) {
6aa58d8a
CY		 3387 invalidate_mapping_pages(META_MAPPING(fio->sbi),
3388 fio->old_blkaddr, fio->old_blkaddr);
6ce19aff
CY		 3389 f2fs_invalidate_compress_page(fio->sbi, fio->old_blkaddr);
3390 }
bfad7c2d 3391
351df4b2 3392 /* writeout dirty page into bdev */
fe16efe6
CY		 3393 f2fs_submit_page_write(fio);
3394 if (fio->retry) {
0a595eba
JK		 3395 fio->old_blkaddr = fio->new_blkaddr;
3396 goto reallocate;
3397 }
fe16efe6 3398
71f2c820 3399 f2fs_update_device_state(fio->sbi, fio->ino, fio->new_blkaddr, 1);
fe16efe6 3400
107a805d 3401 if (keep_order)
e4544b63 3402 f2fs_up_read(&fio->sbi->io_order_lock);
351df4b2
JK		 3403}
3404
4d57b86d 3405void f2fs_do_write_meta_page(struct f2fs_sb_info *sbi, struct page *page,
b0af6d49 3406 enum iostat_type io_type)
351df4b2 3407{
458e6197 3408 struct f2fs_io_info fio = {
05ca3632 3409 .sbi = sbi,
458e6197 3410 .type = META,
0cdd3195 3411 .temp = HOT,
04d328de 3412 .op = REQ_OP_WRITE,
70fd7614 3413 .op_flags = REQ_SYNC | REQ_META | REQ_PRIO,
7a9d7548
CY		 3414 .old_blkaddr = page->index,
3415 .new_blkaddr = page->index,
05ca3632 3416 .page = page,
4375a336 3417 .encrypted_page = NULL,
fb830fc5 3418 .in_list = false,
458e6197
JK		 3419 };
3420
2b947003 3421 if (unlikely(page->index >= MAIN_BLKADDR(sbi)))
04d328de 3422 fio.op_flags &= ~REQ_META;
2b947003 3423
351df4b2 3424 set_page_writeback(page);
17c50035 3425 ClearPageError(page);
b9109b0e 3426 f2fs_submit_page_write(&fio);
b0af6d49 3427
b63e7be5 3428 stat_inc_meta_count(sbi, page->index);
34a23525 3429 f2fs_update_iostat(sbi, NULL, io_type, F2FS_BLKSIZE);
351df4b2
JK		 3430}
3431
4d57b86d 3432void f2fs_do_write_node_page(unsigned int nid, struct f2fs_io_info *fio)
351df4b2
JK		 3433{
3434 struct f2fs_summary sum;
05ca3632 3435
351df4b2 3436 set_summary(&sum, nid, 0, 0);
05ca3632 3437 do_write_page(&sum, fio);
b0af6d49 3438
34a23525 3439 f2fs_update_iostat(fio->sbi, NULL, fio->io_type, F2FS_BLKSIZE);
351df4b2
JK		 3440}
3441
4d57b86d
CY		 3442void f2fs_outplace_write_data(struct dnode_of_data *dn,
3443 struct f2fs_io_info *fio)
351df4b2 3444{
05ca3632 3445 struct f2fs_sb_info *sbi = fio->sbi;
351df4b2 3446 struct f2fs_summary sum;
351df4b2 3447
9850cf4a 3448 f2fs_bug_on(sbi, dn->data_blkaddr == NULL_ADDR);
71644dff
JK		 3449 if (fio->io_type == FS_DATA_IO || fio->io_type == FS_CP_DATA_IO)
3450 f2fs_update_age_extent_cache(dn);
7735730d 3451 set_summary(&sum, dn->nid, dn->ofs_in_node, fio->version);
05ca3632 3452 do_write_page(&sum, fio);
f28b3434 3453 f2fs_update_data_blkaddr(dn, fio->new_blkaddr);
b0af6d49 3454
34a23525 3455 f2fs_update_iostat(sbi, dn->inode, fio->io_type, F2FS_BLKSIZE);
351df4b2
JK		 3456}
3457
4d57b86d 3458int f2fs_inplace_write_data(struct f2fs_io_info *fio)
351df4b2 3459{
b0af6d49 3460 int err;
d21b0f23 3461 struct f2fs_sb_info *sbi = fio->sbi;
05573d6c 3462 unsigned int segno;
b0af6d49 3463
7a9d7548 3464 fio->new_blkaddr = fio->old_blkaddr;
0cdd3195
HL		 3465 /* i/o temperature is needed for passing down write hints */
3466 __get_segment_type(fio);
d21b0f23 3467
05573d6c
CY		 3468 segno = GET_SEGNO(sbi, fio->new_blkaddr);
3469
3470 if (!IS_DATASEG(get_seg_entry(sbi, segno)->type)) {
3471 set_sbi_flag(sbi, SBI_NEED_FSCK);
2d821c12
CY		 3472 f2fs_warn(sbi, "%s: incorrect segment(%u) type, run fsck to fix.",
3473 __func__, segno);
95577278 3474 err = -EFSCORRUPTED;
95fa90c9 3475 f2fs_handle_error(sbi, ERROR_INCONSISTENT_SUM_TYPE);
95577278
CY		 3476 goto drop_bio;
3477 }
3478
1ffc8f5f 3479 if (f2fs_cp_error(sbi)) {
95577278
CY		 3480 err = -EIO;
3481 goto drop_bio;
05573d6c 3482 }
d21b0f23 3483
0d5b9d81
CY		 3484 if (fio->post_read)
3485 invalidate_mapping_pages(META_MAPPING(sbi),
e3b49ea3
HJK		 3486 fio->new_blkaddr, fio->new_blkaddr);
3487
05ca3632 3488 stat_inc_inplace_blocks(fio->sbi);
b0af6d49 3489
0e7f4197 3490 if (fio->bio && !(SM_I(sbi)->ipu_policy & (1 << F2FS_IPU_NOCACHE)))
8648de2c
CY		 3491 err = f2fs_merge_page_bio(fio);
3492 else
3493 err = f2fs_submit_page_bio(fio);
e46f6bd8 3494 if (!err) {
71f2c820
CY		 3495 f2fs_update_device_state(fio->sbi, fio->ino,
3496 fio->new_blkaddr, 1);
34a23525
CY		 3497 f2fs_update_iostat(fio->sbi, fio->page->mapping->host,
3498 fio->io_type, F2FS_BLKSIZE);
e46f6bd8 3499 }
b0af6d49 3500
95577278
CY		 3501 return err;
3502drop_bio:
349c4d6c 3503 if (fio->bio && *(fio->bio)) {
95577278
CY		 3504 struct bio *bio = *(fio->bio);
3505
3506 bio->bi_status = BLK_STS_IOERR;
3507 bio_endio(bio);
349c4d6c 3508 *(fio->bio) = NULL;
95577278 3509 }
b0af6d49 3510 return err;
351df4b2
JK		 3511}
3512
2b60311d
CY		 3513static inline int __f2fs_get_curseg(struct f2fs_sb_info *sbi,
3514 unsigned int segno)
3515{
3516 int i;
3517
3518 for (i = CURSEG_HOT_DATA; i < NO_CHECK_TYPE; i++) {
3519 if (CURSEG_I(sbi, i)->segno == segno)
3520 break;
3521 }
3522 return i;
3523}
3524
4d57b86d 3525void f2fs_do_replace_block(struct f2fs_sb_info *sbi, struct f2fs_summary *sum,
19f106bc 3526 block_t old_blkaddr, block_t new_blkaddr,
c5d02785
CY		 3527 bool recover_curseg, bool recover_newaddr,
3528 bool from_gc)
351df4b2
JK		 3529{
3530 struct sit_info *sit_i = SIT_I(sbi);
3531 struct curseg_info *curseg;
3532 unsigned int segno, old_cursegno;
3533 struct seg_entry *se;
3534 int type;
19f106bc 3535 unsigned short old_blkoff;
753a8ed0 3536 unsigned char old_alloc_type;
351df4b2
JK		 3537
3538 segno = GET_SEGNO(sbi, new_blkaddr);
3539 se = get_seg_entry(sbi, segno);
3540 type = se->type;
3541
e4544b63 3542 f2fs_down_write(&SM_I(sbi)->curseg_lock);
2b60311d 3543
19f106bc
CY		 3544 if (!recover_curseg) {
3545 /* for recovery flow */
3546 if (se->valid_blocks == 0 && !IS_CURSEG(sbi, segno)) {
3547 if (old_blkaddr == NULL_ADDR)
3548 type = CURSEG_COLD_DATA;
3549 else
3550 type = CURSEG_WARM_DATA;
3551 }
3552 } else {
2b60311d
CY		 3553 if (IS_CURSEG(sbi, segno)) {
3554 /* se->type is volatile as SSR allocation */
3555 type = __f2fs_get_curseg(sbi, segno);
3556 f2fs_bug_on(sbi, type == NO_CHECK_TYPE);
3557 } else {
351df4b2 3558 type = CURSEG_WARM_DATA;
2b60311d 3559 }
351df4b2 3560 }
19f106bc 3561
2c190504 3562 f2fs_bug_on(sbi, !IS_DATASEG(type));
351df4b2
JK		 3563 curseg = CURSEG_I(sbi, type);
3564
3565 mutex_lock(&curseg->curseg_mutex);
3d26fa6b 3566 down_write(&sit_i->sentry_lock);
351df4b2
JK		 3567
3568 old_cursegno = curseg->segno;
19f106bc 3569 old_blkoff = curseg->next_blkoff;
753a8ed0 3570 old_alloc_type = curseg->alloc_type;
351df4b2
JK		 3571
3572 /* change the current segment */
3573 if (segno != curseg->segno) {
3574 curseg->next_segno = segno;
5bcd655f 3575 change_curseg(sbi, type);
351df4b2
JK		 3576 }
3577
491c0854 3578 curseg->next_blkoff = GET_BLKOFF_FROM_SEG0(sbi, new_blkaddr);
e79efe3b 3579 __add_sum_entry(sbi, type, sum);
351df4b2 3580
c5d02785
CY		 3581 if (!recover_curseg || recover_newaddr) {
3582 if (!from_gc)
3583 update_segment_mtime(sbi, new_blkaddr, 0);
6e2c64ad 3584 update_sit_entry(sbi, new_blkaddr, 1);
c5d02785 3585 }
6aa58d8a
CY		 3586 if (GET_SEGNO(sbi, old_blkaddr) != NULL_SEGNO) {
3587 invalidate_mapping_pages(META_MAPPING(sbi),
3588 old_blkaddr, old_blkaddr);
6ce19aff 3589 f2fs_invalidate_compress_page(sbi, old_blkaddr);
c5d02785
CY		 3590 if (!from_gc)
3591 update_segment_mtime(sbi, old_blkaddr, 0);
6e2c64ad 3592 update_sit_entry(sbi, old_blkaddr, -1);
6aa58d8a 3593 }
6e2c64ad
JK		 3594
3595 locate_dirty_segment(sbi, GET_SEGNO(sbi, old_blkaddr));
3596 locate_dirty_segment(sbi, GET_SEGNO(sbi, new_blkaddr));
3597
351df4b2 3598 locate_dirty_segment(sbi, old_cursegno);
351df4b2 3599
19f106bc
CY		 3600 if (recover_curseg) {
3601 if (old_cursegno != curseg->segno) {
3602 curseg->next_segno = old_cursegno;
5bcd655f 3603 change_curseg(sbi, type);
19f106bc
CY		 3604 }
3605 curseg->next_blkoff = old_blkoff;
753a8ed0 3606 curseg->alloc_type = old_alloc_type;
19f106bc
CY		 3607 }
3608
3d26fa6b 3609 up_write(&sit_i->sentry_lock);
351df4b2 3610 mutex_unlock(&curseg->curseg_mutex);
e4544b63 3611 f2fs_up_write(&SM_I(sbi)->curseg_lock);
351df4b2
JK		 3612}
3613
528e3459
CY		 3614void f2fs_replace_block(struct f2fs_sb_info *sbi, struct dnode_of_data *dn,
3615 block_t old_addr, block_t new_addr,
28bc106b
CY		 3616 unsigned char version, bool recover_curseg,
3617 bool recover_newaddr)
528e3459
CY		 3618{
3619 struct f2fs_summary sum;
3620
3621 set_summary(&sum, dn->nid, dn->ofs_in_node, version);
3622
4d57b86d 3623 f2fs_do_replace_block(sbi, &sum, old_addr, new_addr,
c5d02785 3624 recover_curseg, recover_newaddr, false);
528e3459 3625
f28b3434 3626 f2fs_update_data_blkaddr(dn, new_addr);
528e3459
CY		 3627}
3628
93dfe2ac 3629void f2fs_wait_on_page_writeback(struct page *page,
bae0ee7a 3630 enum page_type type, bool ordered, bool locked)
93dfe2ac 3631{
93dfe2ac 3632 if (PageWriteback(page)) {
4081363f
JK		 3633 struct f2fs_sb_info *sbi = F2FS_P_SB(page);
3634
0b20fcec 3635 /* submit cached LFS IO */
bab475c5 3636 f2fs_submit_merged_write_cond(sbi, NULL, page, 0, type);
0b20fcec
CY		 3637 /* sbumit cached IPU IO */
3638 f2fs_submit_merged_ipu_write(sbi, NULL, page);
bae0ee7a 3639 if (ordered) {
fec1d657 3640 wait_on_page_writeback(page);
bae0ee7a
CY		 3641 f2fs_bug_on(sbi, locked && PageWriteback(page));
3642 } else {
fec1d657 3643 wait_for_stable_page(page);
bae0ee7a 3644 }
93dfe2ac
JK		 3645 }
3646}
3647
0ded69f6 3648void f2fs_wait_on_block_writeback(struct inode *inode, block_t blkaddr)
08b39fbd 3649{
0ded69f6 3650 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
08b39fbd
CY		 3651 struct page *cpage;
3652
0ded69f6
JK		 3653 if (!f2fs_post_read_required(inode))
3654 return;
3655
93770ab7 3656 if (!__is_valid_data_blkaddr(blkaddr))
08b39fbd
CY		 3657 return;
3658
08b39fbd
CY		 3659 cpage = find_lock_page(META_MAPPING(sbi), blkaddr);
3660 if (cpage) {
bae0ee7a 3661 f2fs_wait_on_page_writeback(cpage, DATA, true, true);
08b39fbd
CY		 3662 f2fs_put_page(cpage, 1);
3663 }
3664}
3665
1e78e8bd
ST		 3666void f2fs_wait_on_block_writeback_range(struct inode *inode, block_t blkaddr,
3667 block_t len)
3668{
0d5b9d81 3669 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1e78e8bd
ST		 3670 block_t i;
3671
0d5b9d81
CY		 3672 if (!f2fs_post_read_required(inode))
3673 return;
3674
1e78e8bd
ST		 3675 for (i = 0; i < len; i++)
3676 f2fs_wait_on_block_writeback(inode, blkaddr + i);
0d5b9d81
CY		 3677
3678 invalidate_mapping_pages(META_MAPPING(sbi), blkaddr, blkaddr + len - 1);
1e78e8bd
ST		 3679}
3680
7735730d 3681static int read_compacted_summaries(struct f2fs_sb_info *sbi)
351df4b2
JK		 3682{
3683 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
3684 struct curseg_info *seg_i;
3685 unsigned char *kaddr;
3686 struct page *page;
3687 block_t start;
3688 int i, j, offset;
3689
3690 start = start_sum_block(sbi);
3691
4d57b86d 3692 page = f2fs_get_meta_page(sbi, start++);
7735730d
CY		 3693 if (IS_ERR(page))
3694 return PTR_ERR(page);
351df4b2
JK		 3695 kaddr = (unsigned char *)page_address(page);
3696
3697 /* Step 1: restore nat cache */
3698 seg_i = CURSEG_I(sbi, CURSEG_HOT_DATA);
b7ad7512 3699 memcpy(seg_i->journal, kaddr, SUM_JOURNAL_SIZE);
351df4b2
JK		 3700
3701 /* Step 2: restore sit cache */
3702 seg_i = CURSEG_I(sbi, CURSEG_COLD_DATA);
b7ad7512 3703 memcpy(seg_i->journal, kaddr + SUM_JOURNAL_SIZE, SUM_JOURNAL_SIZE);
351df4b2
JK		 3704 offset = 2 * SUM_JOURNAL_SIZE;
3705
3706 /* Step 3: restore summary entries */
3707 for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) {
3708 unsigned short blk_off;
3709 unsigned int segno;
3710
3711 seg_i = CURSEG_I(sbi, i);
3712 segno = le32_to_cpu(ckpt->cur_data_segno[i]);
3713 blk_off = le16_to_cpu(ckpt->cur_data_blkoff[i]);
3714 seg_i->next_segno = segno;
3715 reset_curseg(sbi, i, 0);
3716 seg_i->alloc_type = ckpt->alloc_type[i];
3717 seg_i->next_blkoff = blk_off;
3718
3719 if (seg_i->alloc_type == SSR)
3720 blk_off = sbi->blocks_per_seg;
3721
3722 for (j = 0; j < blk_off; j++) {
3723 struct f2fs_summary *s;
5f029c04 3724
351df4b2
JK		 3725 s = (struct f2fs_summary *)(kaddr + offset);
3726 seg_i->sum_blk->entries[j] = *s;
3727 offset += SUMMARY_SIZE;
09cbfeaf 3728 if (offset + SUMMARY_SIZE <= PAGE_SIZE -
351df4b2
JK		 3729 SUM_FOOTER_SIZE)
3730 continue;
3731
3732 f2fs_put_page(page, 1);
3733 page = NULL;
3734
4d57b86d 3735 page = f2fs_get_meta_page(sbi, start++);
7735730d
CY		 3736 if (IS_ERR(page))
3737 return PTR_ERR(page);
351df4b2
JK		 3738 kaddr = (unsigned char *)page_address(page);
3739 offset = 0;
3740 }
3741 }
3742 f2fs_put_page(page, 1);
7735730d 3743 return 0;
351df4b2
JK		 3744}
3745
3746static int read_normal_summaries(struct f2fs_sb_info *sbi, int type)
3747{
3748 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
3749 struct f2fs_summary_block *sum;
3750 struct curseg_info *curseg;
3751 struct page *new;
3752 unsigned short blk_off;
3753 unsigned int segno = 0;
3754 block_t blk_addr = 0;
7735730d 3755 int err = 0;
351df4b2
JK		 3756
3757 /* get segment number and block addr */
3758 if (IS_DATASEG(type)) {
3759 segno = le32_to_cpu(ckpt->cur_data_segno[type]);
3760 blk_off = le16_to_cpu(ckpt->cur_data_blkoff[type -
3761 CURSEG_HOT_DATA]);
119ee914 3762 if (__exist_node_summaries(sbi))
d0b9e42a 3763 blk_addr = sum_blk_addr(sbi, NR_CURSEG_PERSIST_TYPE, type);
351df4b2
JK		 3764 else
3765 blk_addr = sum_blk_addr(sbi, NR_CURSEG_DATA_TYPE, type);
3766 } else {
3767 segno = le32_to_cpu(ckpt->cur_node_segno[type -
3768 CURSEG_HOT_NODE]);
3769 blk_off = le16_to_cpu(ckpt->cur_node_blkoff[type -
3770 CURSEG_HOT_NODE]);
119ee914 3771 if (__exist_node_summaries(sbi))
351df4b2
JK		 3772 blk_addr = sum_blk_addr(sbi, NR_CURSEG_NODE_TYPE,
3773 type - CURSEG_HOT_NODE);
3774 else
3775 blk_addr = GET_SUM_BLOCK(sbi, segno);
3776 }
3777
4d57b86d 3778 new = f2fs_get_meta_page(sbi, blk_addr);
7735730d
CY		 3779 if (IS_ERR(new))
3780 return PTR_ERR(new);
351df4b2
JK		 3781 sum = (struct f2fs_summary_block *)page_address(new);
3782
3783 if (IS_NODESEG(type)) {
119ee914 3784 if (__exist_node_summaries(sbi)) {
351df4b2
JK		 3785 struct f2fs_summary *ns = &sum->entries[0];
3786 int i;
5f029c04 3787
351df4b2
JK		 3788 for (i = 0; i < sbi->blocks_per_seg; i++, ns++) {
3789 ns->version = 0;
3790 ns->ofs_in_node = 0;
3791 }
3792 } else {
7735730d
CY		 3793 err = f2fs_restore_node_summary(sbi, segno, sum);
3794 if (err)
3795 goto out;
351df4b2
JK		 3796 }
3797 }
3798
3799 /* set uncompleted segment to curseg */
3800 curseg = CURSEG_I(sbi, type);
3801 mutex_lock(&curseg->curseg_mutex);
b7ad7512
CY		 3802
3803 /* update journal info */
3804 down_write(&curseg->journal_rwsem);
3805 memcpy(curseg->journal, &sum->journal, SUM_JOURNAL_SIZE);
3806 up_write(&curseg->journal_rwsem);
3807
3808 memcpy(curseg->sum_blk->entries, sum->entries, SUM_ENTRY_SIZE);
3809 memcpy(&curseg->sum_blk->footer, &sum->footer, SUM_FOOTER_SIZE);
351df4b2
JK		 3810 curseg->next_segno = segno;
3811 reset_curseg(sbi, type, 0);
3812 curseg->alloc_type = ckpt->alloc_type[type];
3813 curseg->next_blkoff = blk_off;
3814 mutex_unlock(&curseg->curseg_mutex);
7735730d 3815out:
351df4b2 3816 f2fs_put_page(new, 1);
7735730d 3817 return err;
351df4b2
JK		 3818}
3819
3820static int restore_curseg_summaries(struct f2fs_sb_info *sbi)
3821{
21d3f8e1
JQ		 3822 struct f2fs_journal *sit_j = CURSEG_I(sbi, CURSEG_COLD_DATA)->journal;
3823 struct f2fs_journal *nat_j = CURSEG_I(sbi, CURSEG_HOT_DATA)->journal;
351df4b2 3824 int type = CURSEG_HOT_DATA;
e4fc5fbf 3825 int err;
351df4b2 3826
aaec2b1d 3827 if (is_set_ckpt_flags(sbi, CP_COMPACT_SUM_FLAG)) {
4d57b86d 3828 int npages = f2fs_npages_for_summary_flush(sbi, true);
3fa06d7b
CY		 3829
3830 if (npages >= 2)
4d57b86d 3831 f2fs_ra_meta_pages(sbi, start_sum_block(sbi), npages,
26879fb1 3832 META_CP, true);
3fa06d7b 3833
351df4b2 3834 /* restore for compacted data summary */
7735730d
CY		 3835 err = read_compacted_summaries(sbi);
3836 if (err)
3837 return err;
351df4b2
JK		 3838 type = CURSEG_HOT_NODE;
3839 }
3840
119ee914 3841 if (__exist_node_summaries(sbi))
d0b9e42a
CY		 3842 f2fs_ra_meta_pages(sbi,
3843 sum_blk_addr(sbi, NR_CURSEG_PERSIST_TYPE, type),
3844 NR_CURSEG_PERSIST_TYPE - type, META_CP, true);
3fa06d7b 3845
e4fc5fbf
CY		 3846 for (; type <= CURSEG_COLD_NODE; type++) {
3847 err = read_normal_summaries(sbi, type);
3848 if (err)
3849 return err;
3850 }
3851
21d3f8e1
JQ		 3852 /* sanity check for summary blocks */
3853 if (nats_in_cursum(nat_j) > NAT_JOURNAL_ENTRIES ||
9227d522 3854 sits_in_cursum(sit_j) > SIT_JOURNAL_ENTRIES) {
833dcd35 3855 f2fs_err(sbi, "invalid journal entries nats %u sits %u",
dcbb4c10 3856 nats_in_cursum(nat_j), sits_in_cursum(sit_j));
21d3f8e1 3857 return -EINVAL;
9227d522 3858 }
21d3f8e1 3859
351df4b2
JK		 3860 return 0;
3861}
3862
3863static void write_compacted_summaries(struct f2fs_sb_info *sbi, block_t blkaddr)
3864{
3865 struct page *page;
3866 unsigned char *kaddr;
3867 struct f2fs_summary *summary;
3868 struct curseg_info *seg_i;
3869 int written_size = 0;
3870 int i, j;
3871
4d57b86d 3872 page = f2fs_grab_meta_page(sbi, blkaddr++);
351df4b2 3873 kaddr = (unsigned char *)page_address(page);
81114baa 3874 memset(kaddr, 0, PAGE_SIZE);
351df4b2
JK		 3875
3876 /* Step 1: write nat cache */
3877 seg_i = CURSEG_I(sbi, CURSEG_HOT_DATA);
b7ad7512 3878 memcpy(kaddr, seg_i->journal, SUM_JOURNAL_SIZE);
351df4b2
JK		 3879 written_size += SUM_JOURNAL_SIZE;
3880
3881 /* Step 2: write sit cache */
3882 seg_i = CURSEG_I(sbi, CURSEG_COLD_DATA);
b7ad7512 3883 memcpy(kaddr + written_size, seg_i->journal, SUM_JOURNAL_SIZE);
351df4b2
JK		 3884 written_size += SUM_JOURNAL_SIZE;
3885
351df4b2
JK		 3886 /* Step 3: write summary entries */
3887 for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) {
3888 unsigned short blkoff;
5f029c04 3889
351df4b2
JK		 3890 seg_i = CURSEG_I(sbi, i);
3891 if (sbi->ckpt->alloc_type[i] == SSR)
3892 blkoff = sbi->blocks_per_seg;
3893 else
3894 blkoff = curseg_blkoff(sbi, i);
3895
3896 for (j = 0; j < blkoff; j++) {
3897 if (!page) {
4d57b86d 3898 page = f2fs_grab_meta_page(sbi, blkaddr++);
351df4b2 3899 kaddr = (unsigned char *)page_address(page);
81114baa 3900 memset(kaddr, 0, PAGE_SIZE);
351df4b2
JK		 3901 written_size = 0;
3902 }
3903 summary = (struct f2fs_summary *)(kaddr + written_size);
3904 *summary = seg_i->sum_blk->entries[j];
3905 written_size += SUMMARY_SIZE;
351df4b2 3906
09cbfeaf 3907 if (written_size + SUMMARY_SIZE <= PAGE_SIZE -
351df4b2
JK		 3908 SUM_FOOTER_SIZE)
3909 continue;
3910
e8d61a74 3911 set_page_dirty(page);
351df4b2
JK		 3912 f2fs_put_page(page, 1);
3913 page = NULL;
3914 }
3915 }
e8d61a74
CY		 3916 if (page) {
3917 set_page_dirty(page);
351df4b2 3918 f2fs_put_page(page, 1);
e8d61a74 3919 }
351df4b2
JK		 3920}
3921
3922static void write_normal_summaries(struct f2fs_sb_info *sbi,
3923 block_t blkaddr, int type)
3924{
3925 int i, end;
5f029c04 3926
351df4b2
JK		 3927 if (IS_DATASEG(type))
3928 end = type + NR_CURSEG_DATA_TYPE;
3929 else
3930 end = type + NR_CURSEG_NODE_TYPE;
3931
b7ad7512
CY		 3932 for (i = type; i < end; i++)
3933 write_current_sum_page(sbi, i, blkaddr + (i - type));
351df4b2
JK		 3934}
3935
4d57b86d 3936void f2fs_write_data_summaries(struct f2fs_sb_info *sbi, block_t start_blk)
351df4b2 3937{
aaec2b1d 3938 if (is_set_ckpt_flags(sbi, CP_COMPACT_SUM_FLAG))
351df4b2
JK		 3939 write_compacted_summaries(sbi, start_blk);
3940 else
3941 write_normal_summaries(sbi, start_blk, CURSEG_HOT_DATA);
3942}
3943
4d57b86d 3944void f2fs_write_node_summaries(struct f2fs_sb_info *sbi, block_t start_blk)
351df4b2 3945{
119ee914 3946 write_normal_summaries(sbi, start_blk, CURSEG_HOT_NODE);
351df4b2
JK		 3947}
3948
4d57b86d 3949int f2fs_lookup_journal_in_cursum(struct f2fs_journal *journal, int type,
351df4b2
JK		 3950 unsigned int val, int alloc)
3951{
3952 int i;
3953
3954 if (type == NAT_JOURNAL) {
dfc08a12
CY		 3955 for (i = 0; i < nats_in_cursum(journal); i++) {
3956 if (le32_to_cpu(nid_in_journal(journal, i)) == val)
351df4b2
JK		 3957 return i;
3958 }
dfc08a12
CY		 3959 if (alloc && __has_cursum_space(journal, 1, NAT_JOURNAL))
3960 return update_nats_in_cursum(journal, 1);
351df4b2 3961 } else if (type == SIT_JOURNAL) {
dfc08a12
CY		 3962 for (i = 0; i < sits_in_cursum(journal); i++)
3963 if (le32_to_cpu(segno_in_journal(journal, i)) == val)
351df4b2 3964 return i;
dfc08a12
CY		 3965 if (alloc && __has_cursum_space(journal, 1, SIT_JOURNAL))
3966 return update_sits_in_cursum(journal, 1);
351df4b2
JK		 3967 }
3968 return -1;
3969}
3970
3971static struct page *get_current_sit_page(struct f2fs_sb_info *sbi,
3972 unsigned int segno)
3973{
86f33603 3974 return f2fs_get_meta_page(sbi, current_sit_addr(sbi, segno));
351df4b2
JK		 3975}
3976
3977static struct page *get_next_sit_page(struct f2fs_sb_info *sbi,
3978 unsigned int start)
3979{
3980 struct sit_info *sit_i = SIT_I(sbi);
068c3cd8 3981 struct page *page;
351df4b2 3982 pgoff_t src_off, dst_off;
351df4b2
JK		 3983
3984 src_off = current_sit_addr(sbi, start);
3985 dst_off = next_sit_addr(sbi, src_off);
3986
4d57b86d 3987 page = f2fs_grab_meta_page(sbi, dst_off);
068c3cd8 3988 seg_info_to_sit_page(sbi, page, start);
351df4b2 3989
068c3cd8 3990 set_page_dirty(page);
351df4b2
JK		 3991 set_to_next_sit(sit_i, start);
3992
068c3cd8 3993 return page;
351df4b2
JK		 3994}
3995
184a5cd2
CY		 3996static struct sit_entry_set *grab_sit_entry_set(void)
3997{
3998 struct sit_entry_set *ses =
32410577
CY		 3999 f2fs_kmem_cache_alloc(sit_entry_set_slab,
4000 GFP_NOFS, true, NULL);
184a5cd2
CY		 4001
4002 ses->entry_cnt = 0;
4003 INIT_LIST_HEAD(&ses->set_list);
4004 return ses;
4005}
4006
4007static void release_sit_entry_set(struct sit_entry_set *ses)
4008{
4009 list_del(&ses->set_list);
4010 kmem_cache_free(sit_entry_set_slab, ses);
4011}
4012
4013static void adjust_sit_entry_set(struct sit_entry_set *ses,
4014 struct list_head *head)
4015{
4016 struct sit_entry_set *next = ses;
4017
4018 if (list_is_last(&ses->set_list, head))
4019 return;
4020
4021 list_for_each_entry_continue(next, head, set_list)
df35435d
JK		 4022 if (ses->entry_cnt <= next->entry_cnt) {
4023 list_move_tail(&ses->set_list, &next->set_list);
4024 return;
4025 }
184a5cd2 4026
df35435d 4027 list_move_tail(&ses->set_list, head);
184a5cd2
CY		 4028}
4029
4030static void add_sit_entry(unsigned int segno, struct list_head *head)
4031{
4032 struct sit_entry_set *ses;
4033 unsigned int start_segno = START_SEGNO(segno);
4034
4035 list_for_each_entry(ses, head, set_list) {
4036 if (ses->start_segno == start_segno) {
4037 ses->entry_cnt++;
4038 adjust_sit_entry_set(ses, head);
4039 return;
4040 }
4041 }
4042
4043 ses = grab_sit_entry_set();
4044
4045 ses->start_segno = start_segno;
4046 ses->entry_cnt++;
4047 list_add(&ses->set_list, head);
4048}
4049
4050static void add_sits_in_set(struct f2fs_sb_info *sbi)
4051{
4052 struct f2fs_sm_info *sm_info = SM_I(sbi);
4053 struct list_head *set_list = &sm_info->sit_entry_set;
4054 unsigned long *bitmap = SIT_I(sbi)->dirty_sentries_bitmap;
184a5cd2
CY		 4055 unsigned int segno;
4056
7cd8558b 4057 for_each_set_bit(segno, bitmap, MAIN_SEGS(sbi))
184a5cd2
CY		 4058 add_sit_entry(segno, set_list);
4059}
4060
4061static void remove_sits_in_journal(struct f2fs_sb_info *sbi)
351df4b2
JK		 4062{
4063 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA);
b7ad7512 4064 struct f2fs_journal *journal = curseg->journal;
351df4b2
JK		 4065 int i;
4066
b7ad7512 4067 down_write(&curseg->journal_rwsem);
dfc08a12 4068 for (i = 0; i < sits_in_cursum(journal); i++) {
184a5cd2
CY		 4069 unsigned int segno;
4070 bool dirtied;
4071
dfc08a12 4072 segno = le32_to_cpu(segno_in_journal(journal, i));
184a5cd2
CY		 4073 dirtied = __mark_sit_entry_dirty(sbi, segno);
4074
4075 if (!dirtied)
4076 add_sit_entry(segno, &SM_I(sbi)->sit_entry_set);
351df4b2 4077 }
dfc08a12 4078 update_sits_in_cursum(journal, -i);
b7ad7512 4079 up_write(&curseg->journal_rwsem);
351df4b2
JK		 4080}
4081
0a8165d7 4082/*
351df4b2
JK		 4083 * CP calls this function, which flushes SIT entries including sit_journal,
4084 * and moves prefree segs to free segs.
4085 */
4d57b86d 4086void f2fs_flush_sit_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc)
351df4b2
JK		 4087{
4088 struct sit_info *sit_i = SIT_I(sbi);
4089 unsigned long *bitmap = sit_i->dirty_sentries_bitmap;
4090 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA);
b7ad7512 4091 struct f2fs_journal *journal = curseg->journal;
184a5cd2
CY		 4092 struct sit_entry_set *ses, *tmp;
4093 struct list_head *head = &SM_I(sbi)->sit_entry_set;
04f0b2ea 4094 bool to_journal = !is_sbi_flag_set(sbi, SBI_IS_RESIZEFS);
4b2fecc8 4095 struct seg_entry *se;
351df4b2 4096
3d26fa6b 4097 down_write(&sit_i->sentry_lock);
351df4b2 4098
2b11a74b
WL		 4099 if (!sit_i->dirty_sentries)
4100 goto out;
4101
351df4b2 4102 /*
184a5cd2
CY		 4103 * add and account sit entries of dirty bitmap in sit entry
4104 * set temporarily
351df4b2 4105 */
184a5cd2 4106 add_sits_in_set(sbi);
351df4b2 4107
184a5cd2
CY		 4108 /*
4109 * if there are no enough space in journal to store dirty sit
4110 * entries, remove all entries from journal and add and account
4111 * them in sit entry set.
4112 */
04f0b2ea
QS		 4113 if (!__has_cursum_space(journal, sit_i->dirty_sentries, SIT_JOURNAL) ||
4114 !to_journal)
184a5cd2 4115 remove_sits_in_journal(sbi);
b2955550 4116
184a5cd2
CY		 4117 /*
4118 * there are two steps to flush sit entries:
4119 * #1, flush sit entries to journal in current cold data summary block.
4120 * #2, flush sit entries to sit page.
4121 */
4122 list_for_each_entry_safe(ses, tmp, head, set_list) {
4a257ed6 4123 struct page *page = NULL;
184a5cd2
CY		 4124 struct f2fs_sit_block *raw_sit = NULL;
4125 unsigned int start_segno = ses->start_segno;
4126 unsigned int end = min(start_segno + SIT_ENTRY_PER_BLOCK,
7cd8558b 4127 (unsigned long)MAIN_SEGS(sbi));
184a5cd2
CY		 4128 unsigned int segno = start_segno;
4129
4130 if (to_journal &&
dfc08a12 4131 !__has_cursum_space(journal, ses->entry_cnt, SIT_JOURNAL))
184a5cd2
CY		 4132 to_journal = false;
4133
b7ad7512
CY		 4134 if (to_journal) {
4135 down_write(&curseg->journal_rwsem);
4136 } else {
184a5cd2
CY		 4137 page = get_next_sit_page(sbi, start_segno);
4138 raw_sit = page_address(page);
351df4b2 4139 }
351df4b2 4140
184a5cd2
CY		 4141 /* flush dirty sit entries in region of current sit set */
4142 for_each_set_bit_from(segno, bitmap, end) {
4143 int offset, sit_offset;
4b2fecc8
JK		 4144
4145 se = get_seg_entry(sbi, segno);
56b07e7e
ZZ		 4146#ifdef CONFIG_F2FS_CHECK_FS
4147 if (memcmp(se->cur_valid_map, se->cur_valid_map_mir,
4148 SIT_VBLOCK_MAP_SIZE))
4149 f2fs_bug_on(sbi, 1);
4150#endif
184a5cd2
CY		 4151
4152 /* add discard candidates */
c473f1a9 4153 if (!(cpc->reason & CP_DISCARD)) {
4b2fecc8 4154 cpc->trim_start = segno;
25290fa5 4155 add_discard_addrs(sbi, cpc, false);
4b2fecc8 4156 }
184a5cd2
CY		 4157
4158 if (to_journal) {
4d57b86d 4159 offset = f2fs_lookup_journal_in_cursum(journal,
184a5cd2
CY		 4160 SIT_JOURNAL, segno, 1);
4161 f2fs_bug_on(sbi, offset < 0);
dfc08a12 4162 segno_in_journal(journal, offset) =
184a5cd2
CY		 4163 cpu_to_le32(segno);
4164 seg_info_to_raw_sit(se,
dfc08a12 4165 &sit_in_journal(journal, offset));
56b07e7e
ZZ		 4166 check_block_count(sbi, segno,
4167 &sit_in_journal(journal, offset));
184a5cd2
CY		 4168 } else {
4169 sit_offset = SIT_ENTRY_OFFSET(sit_i, segno);
4170 seg_info_to_raw_sit(se,
4171 &raw_sit->entries[sit_offset]);
56b07e7e
ZZ		 4172 check_block_count(sbi, segno,
4173 &raw_sit->entries[sit_offset]);
184a5cd2 4174 }
351df4b2 4175
184a5cd2
CY		 4176 __clear_bit(segno, bitmap);
4177 sit_i->dirty_sentries--;
4178 ses->entry_cnt--;
351df4b2
JK		 4179 }
4180
b7ad7512
CY		 4181 if (to_journal)
4182 up_write(&curseg->journal_rwsem);
4183 else
184a5cd2
CY		 4184 f2fs_put_page(page, 1);
4185
4186 f2fs_bug_on(sbi, ses->entry_cnt);
4187 release_sit_entry_set(ses);
351df4b2 4188 }
184a5cd2
CY		 4189
4190 f2fs_bug_on(sbi, !list_empty(head));
4191 f2fs_bug_on(sbi, sit_i->dirty_sentries);
184a5cd2 4192out:
c473f1a9 4193 if (cpc->reason & CP_DISCARD) {
650d3c4e
YH		 4194 __u64 trim_start = cpc->trim_start;
4195
4b2fecc8 4196 for (; cpc->trim_start <= cpc->trim_end; cpc->trim_start++)
25290fa5 4197 add_discard_addrs(sbi, cpc, false);
650d3c4e
YH		 4198
4199 cpc->trim_start = trim_start;
4b2fecc8 4200 }
3d26fa6b 4201 up_write(&sit_i->sentry_lock);
351df4b2 4202
351df4b2
JK		 4203 set_prefree_as_free_segments(sbi);
4204}
4205
4206static int build_sit_info(struct f2fs_sb_info *sbi)
4207{
4208 struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
351df4b2
JK		 4209 struct sit_info *sit_i;
4210 unsigned int sit_segs, start;
2fde3dd1 4211 char *src_bitmap, *bitmap;
bbf9f7d9 4212 unsigned int bitmap_size, main_bitmap_size, sit_bitmap_size;
4f993264 4213 unsigned int discard_map = f2fs_block_unit_discard(sbi) ? 1 : 0;
351df4b2
JK		 4214
4215 /* allocate memory for SIT information */
acbf054d 4216 sit_i = f2fs_kzalloc(sbi, sizeof(struct sit_info), GFP_KERNEL);
351df4b2
JK		 4217 if (!sit_i)
4218 return -ENOMEM;
4219
4220 SM_I(sbi)->sit_info = sit_i;
4221
9d2a789c
KC		 4222 sit_i->sentries =
4223 f2fs_kvzalloc(sbi, array_size(sizeof(struct seg_entry),
4224 MAIN_SEGS(sbi)),
4225 GFP_KERNEL);
351df4b2
JK		 4226 if (!sit_i->sentries)
4227 return -ENOMEM;
4228
bbf9f7d9
ST		 4229 main_bitmap_size = f2fs_bitmap_size(MAIN_SEGS(sbi));
4230 sit_i->dirty_sentries_bitmap = f2fs_kvzalloc(sbi, main_bitmap_size,
628b3d14 4231 GFP_KERNEL);
351df4b2
JK		 4232 if (!sit_i->dirty_sentries_bitmap)
4233 return -ENOMEM;
4234
2fde3dd1 4235#ifdef CONFIG_F2FS_CHECK_FS
4f993264 4236 bitmap_size = MAIN_SEGS(sbi) * SIT_VBLOCK_MAP_SIZE * (3 + discard_map);
2fde3dd1 4237#else
4f993264 4238 bitmap_size = MAIN_SEGS(sbi) * SIT_VBLOCK_MAP_SIZE * (2 + discard_map);
2fde3dd1
CY		 4239#endif
4240 sit_i->bitmap = f2fs_kvzalloc(sbi, bitmap_size, GFP_KERNEL);
4241 if (!sit_i->bitmap)
4242 return -ENOMEM;
4243
4244 bitmap = sit_i->bitmap;
4245
7cd8558b 4246 for (start = 0; start < MAIN_SEGS(sbi); start++) {
2fde3dd1
CY		 4247 sit_i->sentries[start].cur_valid_map = bitmap;
4248 bitmap += SIT_VBLOCK_MAP_SIZE;
4249
4250 sit_i->sentries[start].ckpt_valid_map = bitmap;
4251 bitmap += SIT_VBLOCK_MAP_SIZE;
3e025740 4252
355e7891 4253#ifdef CONFIG_F2FS_CHECK_FS
2fde3dd1
CY		 4254 sit_i->sentries[start].cur_valid_map_mir = bitmap;
4255 bitmap += SIT_VBLOCK_MAP_SIZE;
355e7891
CY		 4256#endif
4257
4f993264
CY		 4258 if (discard_map) {
4259 sit_i->sentries[start].discard_map = bitmap;
4260 bitmap += SIT_VBLOCK_MAP_SIZE;
4261 }
351df4b2
JK		 4262 }
4263
acbf054d 4264 sit_i->tmp_map = f2fs_kzalloc(sbi, SIT_VBLOCK_MAP_SIZE, GFP_KERNEL);
60a3b782
JK		 4265 if (!sit_i->tmp_map)
4266 return -ENOMEM;
4267
2c70c5e3 4268 if (__is_large_section(sbi)) {
9d2a789c
KC		 4269 sit_i->sec_entries =
4270 f2fs_kvzalloc(sbi, array_size(sizeof(struct sec_entry),
4271 MAIN_SECS(sbi)),
4272 GFP_KERNEL);
351df4b2
JK		 4273 if (!sit_i->sec_entries)
4274 return -ENOMEM;
4275 }
4276
4277 /* get information related with SIT */
4278 sit_segs = le32_to_cpu(raw_super->segment_count_sit) >> 1;
4279
4280 /* setup SIT bitmap from ckeckpoint pack */
bbf9f7d9 4281 sit_bitmap_size = __bitmap_size(sbi, SIT_BITMAP);
351df4b2
JK		 4282 src_bitmap = __bitmap_ptr(sbi, SIT_BITMAP);
4283
bbf9f7d9 4284 sit_i->sit_bitmap = kmemdup(src_bitmap, sit_bitmap_size, GFP_KERNEL);
ae27d62e 4285 if (!sit_i->sit_bitmap)
351df4b2 4286 return -ENOMEM;
351df4b2 4287
ae27d62e 4288#ifdef CONFIG_F2FS_CHECK_FS
bbf9f7d9
ST		 4289 sit_i->sit_bitmap_mir = kmemdup(src_bitmap,
4290 sit_bitmap_size, GFP_KERNEL);
ae27d62e
CY		 4291 if (!sit_i->sit_bitmap_mir)
4292 return -ENOMEM;
bbf9f7d9
ST		 4293
4294 sit_i->invalid_segmap = f2fs_kvzalloc(sbi,
4295 main_bitmap_size, GFP_KERNEL);
4296 if (!sit_i->invalid_segmap)
4297 return -ENOMEM;
ae27d62e
CY		 4298#endif
4299
351df4b2
JK		 4300 sit_i->sit_base_addr = le32_to_cpu(raw_super->sit_blkaddr);
4301 sit_i->sit_blocks = sit_segs << sbi->log_blocks_per_seg;
c79b7ff1 4302 sit_i->written_valid_blocks = 0;
bbf9f7d9 4303 sit_i->bitmap_size = sit_bitmap_size;
351df4b2
JK		 4304 sit_i->dirty_sentries = 0;
4305 sit_i->sents_per_block = SIT_ENTRY_PER_BLOCK;
4306 sit_i->elapsed_time = le64_to_cpu(sbi->ckpt->elapsed_time);
a7e679b5 4307 sit_i->mounted_time = ktime_get_boottime_seconds();
3d26fa6b 4308 init_rwsem(&sit_i->sentry_lock);
351df4b2
JK		 4309 return 0;
4310}
4311
4312static int build_free_segmap(struct f2fs_sb_info *sbi)
4313{
351df4b2
JK		 4314 struct free_segmap_info *free_i;
4315 unsigned int bitmap_size, sec_bitmap_size;
4316
4317 /* allocate memory for free segmap information */
acbf054d 4318 free_i = f2fs_kzalloc(sbi, sizeof(struct free_segmap_info), GFP_KERNEL);
351df4b2
JK		 4319 if (!free_i)
4320 return -ENOMEM;
4321
4322 SM_I(sbi)->free_info = free_i;
4323
7cd8558b 4324 bitmap_size = f2fs_bitmap_size(MAIN_SEGS(sbi));
628b3d14 4325 free_i->free_segmap = f2fs_kvmalloc(sbi, bitmap_size, GFP_KERNEL);
351df4b2
JK		 4326 if (!free_i->free_segmap)
4327 return -ENOMEM;
4328
7cd8558b 4329 sec_bitmap_size = f2fs_bitmap_size(MAIN_SECS(sbi));
628b3d14 4330 free_i->free_secmap = f2fs_kvmalloc(sbi, sec_bitmap_size, GFP_KERNEL);
351df4b2
JK		 4331 if (!free_i->free_secmap)
4332 return -ENOMEM;
4333
4334 /* set all segments as dirty temporarily */
4335 memset(free_i->free_segmap, 0xff, bitmap_size);
4336 memset(free_i->free_secmap, 0xff, sec_bitmap_size);
4337
4338 /* init free segmap information */
7cd8558b 4339 free_i->start_segno = GET_SEGNO_FROM_SEG0(sbi, MAIN_BLKADDR(sbi));
351df4b2
JK		 4340 free_i->free_segments = 0;
4341 free_i->free_sections = 0;
1a118ccf 4342 spin_lock_init(&free_i->segmap_lock);
351df4b2
JK		 4343 return 0;
4344}
4345
4346static int build_curseg(struct f2fs_sb_info *sbi)
4347{
1042d60f 4348 struct curseg_info *array;
351df4b2
JK		 4349 int i;
4350
d0b9e42a
CY		 4351 array = f2fs_kzalloc(sbi, array_size(NR_CURSEG_TYPE,
4352 sizeof(*array)), GFP_KERNEL);
351df4b2
JK		 4353 if (!array)
4354 return -ENOMEM;
4355
4356 SM_I(sbi)->curseg_array = array;
4357
d0b9e42a 4358 for (i = 0; i < NO_CHECK_TYPE; i++) {
351df4b2 4359 mutex_init(&array[i].curseg_mutex);
acbf054d 4360 array[i].sum_blk = f2fs_kzalloc(sbi, PAGE_SIZE, GFP_KERNEL);
351df4b2
JK		 4361 if (!array[i].sum_blk)
4362 return -ENOMEM;
b7ad7512 4363 init_rwsem(&array[i].journal_rwsem);
acbf054d
CY		 4364 array[i].journal = f2fs_kzalloc(sbi,
4365 sizeof(struct f2fs_journal), GFP_KERNEL);
b7ad7512
CY		 4366 if (!array[i].journal)
4367 return -ENOMEM;
d0b9e42a
CY		 4368 if (i < NR_PERSISTENT_LOG)
4369 array[i].seg_type = CURSEG_HOT_DATA + i;
4370 else if (i == CURSEG_COLD_DATA_PINNED)
4371 array[i].seg_type = CURSEG_COLD_DATA;
093749e2
CY		 4372 else if (i == CURSEG_ALL_DATA_ATGC)
4373 array[i].seg_type = CURSEG_COLD_DATA;
351df4b2
JK		 4374 array[i].segno = NULL_SEGNO;
4375 array[i].next_blkoff = 0;
d0b9e42a 4376 array[i].inited = false;
351df4b2
JK		 4377 }
4378 return restore_curseg_summaries(sbi);
4379}
4380
c39a1b34 4381static int build_sit_entries(struct f2fs_sb_info *sbi)
351df4b2
JK		 4382{
4383 struct sit_info *sit_i = SIT_I(sbi);
4384 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA);
b7ad7512 4385 struct f2fs_journal *journal = curseg->journal;
9c094040
YH		 4386 struct seg_entry *se;
4387 struct f2fs_sit_entry sit;
74de593a
CY		 4388 int sit_blk_cnt = SIT_BLK_CNT(sbi);
4389 unsigned int i, start, end;
4390 unsigned int readed, start_blk = 0;
c39a1b34 4391 int err = 0;
6b8beca0 4392 block_t sit_valid_blocks[2] = {0, 0};
351df4b2 4393
74de593a 4394 do {
a8affc03 4395 readed = f2fs_ra_meta_pages(sbi, start_blk, BIO_MAX_VECS,
664ba972 4396 META_SIT, true);
74de593a
CY		 4397
4398 start = start_blk * sit_i->sents_per_block;
4399 end = (start_blk + readed) * sit_i->sents_per_block;
4400
7cd8558b 4401 for (; start < end && start < MAIN_SEGS(sbi); start++) {
74de593a 4402 struct f2fs_sit_block *sit_blk;
74de593a
CY		 4403 struct page *page;
4404
9c094040 4405 se = &sit_i->sentries[start];
74de593a 4406 page = get_current_sit_page(sbi, start);
edc55aaf
JK		 4407 if (IS_ERR(page))
4408 return PTR_ERR(page);
74de593a
CY		 4409 sit_blk = (struct f2fs_sit_block *)page_address(page);
4410 sit = sit_blk->entries[SIT_ENTRY_OFFSET(sit_i, start)];
4411 f2fs_put_page(page, 1);
d600af23 4412
c39a1b34
JK		 4413 err = check_block_count(sbi, start, &sit);
4414 if (err)
4415 return err;
74de593a 4416 seg_info_from_raw_sit(se, &sit);
6b8beca0 4417
09beadf2
CY		 4418 if (se->type >= NR_PERSISTENT_LOG) {
4419 f2fs_err(sbi, "Invalid segment type: %u, segno: %u",
4420 se->type, start);
95fa90c9
CY		 4421 f2fs_handle_error(sbi,
4422 ERROR_INCONSISTENT_SUM_TYPE);
09beadf2
CY		 4423 return -EFSCORRUPTED;
4424 }
4425
6b8beca0 4426 sit_valid_blocks[SE_PAGETYPE(se)] += se->valid_blocks;
a66cdd98 4427
4f993264
CY		 4428 if (f2fs_block_unit_discard(sbi)) {
4429 /* build discard map only one time */
4430 if (is_set_ckpt_flags(sbi, CP_TRIMMED_FLAG)) {
4431 memset(se->discard_map, 0xff,
4432 SIT_VBLOCK_MAP_SIZE);
4433 } else {
4434 memcpy(se->discard_map,
4435 se->cur_valid_map,
4436 SIT_VBLOCK_MAP_SIZE);
4437 sbi->discard_blks +=
4438 sbi->blocks_per_seg -
4439 se->valid_blocks;
4440 }
3e025740 4441 }
a66cdd98 4442
2c70c5e3 4443 if (__is_large_section(sbi))
d600af23
CY		 4444 get_sec_entry(sbi, start)->valid_blocks +=
4445 se->valid_blocks;
351df4b2 4446 }
74de593a
CY		 4447 start_blk += readed;
4448 } while (start_blk < sit_blk_cnt);
d600af23
CY		 4449
4450 down_read(&curseg->journal_rwsem);
4451 for (i = 0; i < sits_in_cursum(journal); i++) {
d600af23
CY		 4452 unsigned int old_valid_blocks;
4453
4454 start = le32_to_cpu(segno_in_journal(journal, i));
b2ca374f 4455 if (start >= MAIN_SEGS(sbi)) {
dcbb4c10
JP		 4456 f2fs_err(sbi, "Wrong journal entry on segno %u",
4457 start);
10f966bb 4458 err = -EFSCORRUPTED;
95fa90c9 4459 f2fs_handle_error(sbi, ERROR_CORRUPTED_JOURNAL);
b2ca374f
JK		 4460 break;
4461 }
4462
d600af23
CY		 4463 se = &sit_i->sentries[start];
4464 sit = sit_in_journal(journal, i);
4465
4466 old_valid_blocks = se->valid_blocks;
6b8beca0
CY		 4467
4468 sit_valid_blocks[SE_PAGETYPE(se)] -= old_valid_blocks;
d600af23 4469
c39a1b34
JK		 4470 err = check_block_count(sbi, start, &sit);
4471 if (err)
4472 break;
d600af23 4473 seg_info_from_raw_sit(se, &sit);
6b8beca0 4474
09beadf2
CY		 4475 if (se->type >= NR_PERSISTENT_LOG) {
4476 f2fs_err(sbi, "Invalid segment type: %u, segno: %u",
4477 se->type, start);
4478 err = -EFSCORRUPTED;
95fa90c9 4479 f2fs_handle_error(sbi, ERROR_INCONSISTENT_SUM_TYPE);
09beadf2
CY		 4480 break;
4481 }
4482
6b8beca0 4483 sit_valid_blocks[SE_PAGETYPE(se)] += se->valid_blocks;
d600af23 4484
4f993264
CY		 4485 if (f2fs_block_unit_discard(sbi)) {
4486 if (is_set_ckpt_flags(sbi, CP_TRIMMED_FLAG)) {
4487 memset(se->discard_map, 0xff, SIT_VBLOCK_MAP_SIZE);
4488 } else {
4489 memcpy(se->discard_map, se->cur_valid_map,
4490 SIT_VBLOCK_MAP_SIZE);
4491 sbi->discard_blks += old_valid_blocks;
4492 sbi->discard_blks -= se->valid_blocks;
4493 }
d600af23
CY		 4494 }
4495
2c70c5e3 4496 if (__is_large_section(sbi)) {
d600af23 4497 get_sec_entry(sbi, start)->valid_blocks +=
a9af3fdc
CY		 4498 se->valid_blocks;
4499 get_sec_entry(sbi, start)->valid_blocks -=
4500 old_valid_blocks;
4501 }
d600af23
CY		 4502 }
4503 up_read(&curseg->journal_rwsem);
8a29c126 4504
6b8beca0
CY		 4505 if (err)
4506 return err;
4507
4508 if (sit_valid_blocks[NODE] != valid_node_count(sbi)) {
dcbb4c10 4509 f2fs_err(sbi, "SIT is corrupted node# %u vs %u",
6b8beca0 4510 sit_valid_blocks[NODE], valid_node_count(sbi));
95fa90c9 4511 f2fs_handle_error(sbi, ERROR_INCONSISTENT_NODE_COUNT);
6b8beca0 4512 return -EFSCORRUPTED;
8a29c126
JK		 4513 }
4514
6b8beca0
CY		 4515 if (sit_valid_blocks[DATA] + sit_valid_blocks[NODE] >
4516 valid_user_blocks(sbi)) {
4517 f2fs_err(sbi, "SIT is corrupted data# %u %u vs %u",
4518 sit_valid_blocks[DATA], sit_valid_blocks[NODE],
4519 valid_user_blocks(sbi));
95fa90c9 4520 f2fs_handle_error(sbi, ERROR_INCONSISTENT_BLOCK_COUNT);
6b8beca0
CY		 4521 return -EFSCORRUPTED;
4522 }
4523
4524 return 0;
351df4b2
JK		 4525}
4526
4527static void init_free_segmap(struct f2fs_sb_info *sbi)
4528{
4529 unsigned int start;
4530 int type;
de881df9 4531 struct seg_entry *sentry;
351df4b2 4532
7cd8558b 4533 for (start = 0; start < MAIN_SEGS(sbi); start++) {
de881df9
AR		 4534 if (f2fs_usable_blks_in_seg(sbi, start) == 0)
4535 continue;
4536 sentry = get_seg_entry(sbi, start);
351df4b2
JK		 4537 if (!sentry->valid_blocks)
4538 __set_free(sbi, start);
c79b7ff1
JK		 4539 else
4540 SIT_I(sbi)->written_valid_blocks +=
4541 sentry->valid_blocks;
351df4b2
JK		 4542 }
4543
4544 /* set use the current segments */
4545 for (type = CURSEG_HOT_DATA; type <= CURSEG_COLD_NODE; type++) {
4546 struct curseg_info *curseg_t = CURSEG_I(sbi, type);
5f029c04 4547
351df4b2
JK		 4548 __set_test_and_inuse(sbi, curseg_t->segno);
4549 }
4550}
4551
4552static void init_dirty_segmap(struct f2fs_sb_info *sbi)
4553{
4554 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
4555 struct free_segmap_info *free_i = FREE_I(sbi);
da52f8ad 4556 unsigned int segno = 0, offset = 0, secno;
de881df9 4557 block_t valid_blocks, usable_blks_in_seg;
351df4b2 4558
8736fbf0 4559 while (1) {
351df4b2 4560 /* find dirty segment based on free segmap */
7cd8558b
JK		 4561 segno = find_next_inuse(free_i, MAIN_SEGS(sbi), offset);
4562 if (segno >= MAIN_SEGS(sbi))
351df4b2
JK		 4563 break;
4564 offset = segno + 1;
302bd348 4565 valid_blocks = get_valid_blocks(sbi, segno, false);
de881df9
AR		 4566 usable_blks_in_seg = f2fs_usable_blks_in_seg(sbi, segno);
4567 if (valid_blocks == usable_blks_in_seg || !valid_blocks)
351df4b2 4568 continue;
de881df9 4569 if (valid_blocks > usable_blks_in_seg) {
ec325b52
JK		 4570 f2fs_bug_on(sbi, 1);
4571 continue;
4572 }
351df4b2
JK		 4573 mutex_lock(&dirty_i->seglist_lock);
4574 __locate_dirty_segment(sbi, segno, DIRTY);
4575 mutex_unlock(&dirty_i->seglist_lock);
4576 }
da52f8ad
JQ		 4577
4578 if (!__is_large_section(sbi))
4579 return;
4580
4581 mutex_lock(&dirty_i->seglist_lock);
5335bfc6 4582 for (segno = 0; segno < MAIN_SEGS(sbi); segno += sbi->segs_per_sec) {
da52f8ad
JQ		 4583 valid_blocks = get_valid_blocks(sbi, segno, true);
4584 secno = GET_SEC_FROM_SEG(sbi, segno);
4585
074b5ea2 4586 if (!valid_blocks || valid_blocks == CAP_BLKS_PER_SEC(sbi))
da52f8ad
JQ		 4587 continue;
4588 if (IS_CURSEC(sbi, secno))
4589 continue;
4590 set_bit(secno, dirty_i->dirty_secmap);
4591 }
4592 mutex_unlock(&dirty_i->seglist_lock);
351df4b2
JK		 4593}
4594
5ec4e49f 4595static int init_victim_secmap(struct f2fs_sb_info *sbi)
351df4b2
JK		 4596{
4597 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
7cd8558b 4598 unsigned int bitmap_size = f2fs_bitmap_size(MAIN_SECS(sbi));
351df4b2 4599
628b3d14 4600 dirty_i->victim_secmap = f2fs_kvzalloc(sbi, bitmap_size, GFP_KERNEL);
5ec4e49f 4601 if (!dirty_i->victim_secmap)
351df4b2 4602 return -ENOMEM;
71419129
CY		 4603
4604 dirty_i->pinned_secmap = f2fs_kvzalloc(sbi, bitmap_size, GFP_KERNEL);
4605 if (!dirty_i->pinned_secmap)
4606 return -ENOMEM;
4607
4608 dirty_i->pinned_secmap_cnt = 0;
4609 dirty_i->enable_pin_section = true;
351df4b2
JK		 4610 return 0;
4611}
4612
4613static int build_dirty_segmap(struct f2fs_sb_info *sbi)
4614{
4615 struct dirty_seglist_info *dirty_i;
4616 unsigned int bitmap_size, i;
4617
4618 /* allocate memory for dirty segments list information */
acbf054d
CY		 4619 dirty_i = f2fs_kzalloc(sbi, sizeof(struct dirty_seglist_info),
4620 GFP_KERNEL);
351df4b2
JK		 4621 if (!dirty_i)
4622 return -ENOMEM;
4623
4624 SM_I(sbi)->dirty_info = dirty_i;
4625 mutex_init(&dirty_i->seglist_lock);
4626
7cd8558b 4627 bitmap_size = f2fs_bitmap_size(MAIN_SEGS(sbi));
351df4b2
JK		 4628
4629 for (i = 0; i < NR_DIRTY_TYPE; i++) {
628b3d14
CY		 4630 dirty_i->dirty_segmap[i] = f2fs_kvzalloc(sbi, bitmap_size,
4631 GFP_KERNEL);
351df4b2
JK		 4632 if (!dirty_i->dirty_segmap[i])
4633 return -ENOMEM;
4634 }
4635
da52f8ad
JQ		 4636 if (__is_large_section(sbi)) {
4637 bitmap_size = f2fs_bitmap_size(MAIN_SECS(sbi));
4638 dirty_i->dirty_secmap = f2fs_kvzalloc(sbi,
4639 bitmap_size, GFP_KERNEL);
4640 if (!dirty_i->dirty_secmap)
4641 return -ENOMEM;
4642 }
4643
351df4b2 4644 init_dirty_segmap(sbi);
5ec4e49f 4645 return init_victim_secmap(sbi);
351df4b2
JK		 4646}
4647
c854f4d6
CY		 4648static int sanity_check_curseg(struct f2fs_sb_info *sbi)
4649{
4650 int i;
4651
4652 /*
4653 * In LFS/SSR curseg, .next_blkoff should point to an unused blkaddr;
4654 * In LFS curseg, all blkaddr after .next_blkoff should be unused.
4655 */
d0b9e42a 4656 for (i = 0; i < NR_PERSISTENT_LOG; i++) {
c854f4d6
CY		 4657 struct curseg_info *curseg = CURSEG_I(sbi, i);
4658 struct seg_entry *se = get_seg_entry(sbi, curseg->segno);
4659 unsigned int blkofs = curseg->next_blkoff;
4660
a7d9fe3c
JK		 4661 if (f2fs_sb_has_readonly(sbi) &&
4662 i != CURSEG_HOT_DATA && i != CURSEG_HOT_NODE)
4663 continue;
4664
093749e2 4665 sanity_check_seg_type(sbi, curseg->seg_type);
f41ee8b9
CY		 4666
4667 if (curseg->alloc_type != LFS && curseg->alloc_type != SSR) {
4668 f2fs_err(sbi,
4669 "Current segment has invalid alloc_type:%d",
4670 curseg->alloc_type);
95fa90c9 4671 f2fs_handle_error(sbi, ERROR_INVALID_CURSEG);
f41ee8b9
CY		 4672 return -EFSCORRUPTED;
4673 }
093749e2 4674
c854f4d6
CY		 4675 if (f2fs_test_bit(blkofs, se->cur_valid_map))
4676 goto out;
4677
4678 if (curseg->alloc_type == SSR)
4679 continue;
4680
4681 for (blkofs += 1; blkofs < sbi->blocks_per_seg; blkofs++) {
4682 if (!f2fs_test_bit(blkofs, se->cur_valid_map))
4683 continue;
4684out:
dcbb4c10
JP		 4685 f2fs_err(sbi,
4686 "Current segment's next free block offset is inconsistent with bitmap, logtype:%u, segno:%u, type:%u, next_blkoff:%u, blkofs:%u",
4687 i, curseg->segno, curseg->alloc_type,
4688 curseg->next_blkoff, blkofs);
95fa90c9 4689 f2fs_handle_error(sbi, ERROR_INVALID_CURSEG);
10f966bb 4690 return -EFSCORRUPTED;
c854f4d6
CY		 4691 }
4692 }
4693 return 0;
4694}
4695
c426d991
SK		 4696#ifdef CONFIG_BLK_DEV_ZONED
4697
d508c94e
SK		 4698static int check_zone_write_pointer(struct f2fs_sb_info *sbi,
4699 struct f2fs_dev_info *fdev,
4700 struct blk_zone *zone)
4701{
4702 unsigned int wp_segno, wp_blkoff, zone_secno, zone_segno, segno;
4703 block_t zone_block, wp_block, last_valid_block;
4704 unsigned int log_sectors_per_block = sbi->log_blocksize - SECTOR_SHIFT;
4705 int i, s, b, ret;
4706 struct seg_entry *se;
4707
4708 if (zone->type != BLK_ZONE_TYPE_SEQWRITE_REQ)
4709 return 0;
4710
4711 wp_block = fdev->start_blk + (zone->wp >> log_sectors_per_block);
4712 wp_segno = GET_SEGNO(sbi, wp_block);
4713 wp_blkoff = wp_block - START_BLOCK(sbi, wp_segno);
4714 zone_block = fdev->start_blk + (zone->start >> log_sectors_per_block);
4715 zone_segno = GET_SEGNO(sbi, zone_block);
4716 zone_secno = GET_SEC_FROM_SEG(sbi, zone_segno);
4717
4718 if (zone_segno >= MAIN_SEGS(sbi))
4719 return 0;
4720
4721 /*
4722 * Skip check of zones cursegs point to, since
4723 * fix_curseg_write_pointer() checks them.
4724 */
4725 for (i = 0; i < NO_CHECK_TYPE; i++)
4726 if (zone_secno == GET_SEC_FROM_SEG(sbi,
4727 CURSEG_I(sbi, i)->segno))
4728 return 0;
4729
4730 /*
4731 * Get last valid block of the zone.
4732 */
4733 last_valid_block = zone_block - 1;
4734 for (s = sbi->segs_per_sec - 1; s >= 0; s--) {
4735 segno = zone_segno + s;
4736 se = get_seg_entry(sbi, segno);
4737 for (b = sbi->blocks_per_seg - 1; b >= 0; b--)
4738 if (f2fs_test_bit(b, se->cur_valid_map)) {
4739 last_valid_block = START_BLOCK(sbi, segno) + b;
4740 break;
4741 }
4742 if (last_valid_block >= zone_block)
4743 break;
4744 }
4745
4746 /*
4747 * If last valid block is beyond the write pointer, report the
4748 * inconsistency. This inconsistency does not cause write error
4749 * because the zone will not be selected for write operation until
4750 * it get discarded. Just report it.
4751 */
4752 if (last_valid_block >= wp_block) {
4753 f2fs_notice(sbi, "Valid block beyond write pointer: "
4754 "valid block[0x%x,0x%x] wp[0x%x,0x%x]",
4755 GET_SEGNO(sbi, last_valid_block),
4756 GET_BLKOFF_FROM_SEG0(sbi, last_valid_block),
4757 wp_segno, wp_blkoff);
4758 return 0;
4759 }
4760
4761 /*
4762 * If there is no valid block in the zone and if write pointer is
4763 * not at zone start, reset the write pointer.
4764 */
4765 if (last_valid_block + 1 == zone_block && zone->wp != zone->start) {
4766 f2fs_notice(sbi,
4767 "Zone without valid block has non-zero write "
4768 "pointer. Reset the write pointer: wp[0x%x,0x%x]",
4769 wp_segno, wp_blkoff);
4770 ret = __f2fs_issue_discard_zone(sbi, fdev->bdev, zone_block,
4771 zone->len >> log_sectors_per_block);
4772 if (ret) {
4773 f2fs_err(sbi, "Discard zone failed: %s (errno=%d)",
4774 fdev->path, ret);
4775 return ret;
4776 }
4777 }
4778
4779 return 0;
4780}
4781
c426d991
SK		 4782static struct f2fs_dev_info *get_target_zoned_dev(struct f2fs_sb_info *sbi,
4783 block_t zone_blkaddr)
4784{
4785 int i;
4786
4787 for (i = 0; i < sbi->s_ndevs; i++) {
4788 if (!bdev_is_zoned(FDEV(i).bdev))
4789 continue;
4790 if (sbi->s_ndevs == 1 || (FDEV(i).start_blk <= zone_blkaddr &&
4791 zone_blkaddr <= FDEV(i).end_blk))
4792 return &FDEV(i);
4793 }
4794
4795 return NULL;
4796}
4797
4798static int report_one_zone_cb(struct blk_zone *zone, unsigned int idx,
5f029c04
YZ		 4799 void *data)
4800{
c426d991
SK		 4801 memcpy(data, zone, sizeof(struct blk_zone));
4802 return 0;
4803}
4804
4805static int fix_curseg_write_pointer(struct f2fs_sb_info *sbi, int type)
4806{
4807 struct curseg_info *cs = CURSEG_I(sbi, type);
4808 struct f2fs_dev_info *zbd;
4809 struct blk_zone zone;
4810 unsigned int cs_section, wp_segno, wp_blkoff, wp_sector_off;
4811 block_t cs_zone_block, wp_block;
4812 unsigned int log_sectors_per_block = sbi->log_blocksize - SECTOR_SHIFT;
4813 sector_t zone_sector;
4814 int err;
4815
4816 cs_section = GET_SEC_FROM_SEG(sbi, cs->segno);
4817 cs_zone_block = START_BLOCK(sbi, GET_SEG_FROM_SEC(sbi, cs_section));
4818
4819 zbd = get_target_zoned_dev(sbi, cs_zone_block);
4820 if (!zbd)
4821 return 0;
4822
4823 /* report zone for the sector the curseg points to */
4824 zone_sector = (sector_t)(cs_zone_block - zbd->start_blk)
4825 << log_sectors_per_block;
4826 err = blkdev_report_zones(zbd->bdev, zone_sector, 1,
4827 report_one_zone_cb, &zone);
4828 if (err != 1) {
4829 f2fs_err(sbi, "Report zone failed: %s errno=(%d)",
4830 zbd->path, err);
4831 return err;
4832 }
4833
4834 if (zone.type != BLK_ZONE_TYPE_SEQWRITE_REQ)
4835 return 0;
4836
4837 wp_block = zbd->start_blk + (zone.wp >> log_sectors_per_block);
4838 wp_segno = GET_SEGNO(sbi, wp_block);
4839 wp_blkoff = wp_block - START_BLOCK(sbi, wp_segno);
4840 wp_sector_off = zone.wp & GENMASK(log_sectors_per_block - 1, 0);
4841
4842 if (cs->segno == wp_segno && cs->next_blkoff == wp_blkoff &&
4843 wp_sector_off == 0)
4844 return 0;
4845
4846 f2fs_notice(sbi, "Unaligned curseg[%d] with write pointer: "
4847 "curseg[0x%x,0x%x] wp[0x%x,0x%x]",
4848 type, cs->segno, cs->next_blkoff, wp_segno, wp_blkoff);
4849
4850 f2fs_notice(sbi, "Assign new section to curseg[%d]: "
4851 "curseg[0x%x,0x%x]", type, cs->segno, cs->next_blkoff);
509f1010
CY		 4852
4853 f2fs_allocate_new_section(sbi, type, true);
c426d991 4854
d508c94e
SK		 4855 /* check consistency of the zone curseg pointed to */
4856 if (check_zone_write_pointer(sbi, zbd, &zone))
4857 return -EIO;
4858
c426d991
SK		 4859 /* check newly assigned zone */
4860 cs_section = GET_SEC_FROM_SEG(sbi, cs->segno);
4861 cs_zone_block = START_BLOCK(sbi, GET_SEG_FROM_SEC(sbi, cs_section));
4862
4863 zbd = get_target_zoned_dev(sbi, cs_zone_block);
4864 if (!zbd)
4865 return 0;
4866
4867 zone_sector = (sector_t)(cs_zone_block - zbd->start_blk)
4868 << log_sectors_per_block;
4869 err = blkdev_report_zones(zbd->bdev, zone_sector, 1,
4870 report_one_zone_cb, &zone);
4871 if (err != 1) {
4872 f2fs_err(sbi, "Report zone failed: %s errno=(%d)",
4873 zbd->path, err);
4874 return err;
4875 }
4876
4877 if (zone.type != BLK_ZONE_TYPE_SEQWRITE_REQ)
4878 return 0;
4879
4880 if (zone.wp != zone.start) {
4881 f2fs_notice(sbi,
4882 "New zone for curseg[%d] is not yet discarded. "
4883 "Reset the zone: curseg[0x%x,0x%x]",
4884 type, cs->segno, cs->next_blkoff);
4885 err = __f2fs_issue_discard_zone(sbi, zbd->bdev,
4886 zone_sector >> log_sectors_per_block,
4887 zone.len >> log_sectors_per_block);
4888 if (err) {
4889 f2fs_err(sbi, "Discard zone failed: %s (errno=%d)",
4890 zbd->path, err);
4891 return err;
4892 }
4893 }
4894
4895 return 0;
4896}
4897
4898int f2fs_fix_curseg_write_pointer(struct f2fs_sb_info *sbi)
4899{
4900 int i, ret;
4901
d0b9e42a 4902 for (i = 0; i < NR_PERSISTENT_LOG; i++) {
c426d991
SK		 4903 ret = fix_curseg_write_pointer(sbi, i);
4904 if (ret)
4905 return ret;
4906 }
4907
4908 return 0;
4909}
d508c94e
SK		 4910
4911struct check_zone_write_pointer_args {
4912 struct f2fs_sb_info *sbi;
4913 struct f2fs_dev_info *fdev;
4914};
4915
4916static int check_zone_write_pointer_cb(struct blk_zone *zone, unsigned int idx,
5f029c04
YZ		 4917 void *data)
4918{
d508c94e 4919 struct check_zone_write_pointer_args *args;
5f029c04 4920
d508c94e
SK		 4921 args = (struct check_zone_write_pointer_args *)data;
4922
4923 return check_zone_write_pointer(args->sbi, args->fdev, zone);
4924}
4925
4926int f2fs_check_write_pointer(struct f2fs_sb_info *sbi)
4927{
4928 int i, ret;
4929 struct check_zone_write_pointer_args args;
4930
4931 for (i = 0; i < sbi->s_ndevs; i++) {
4932 if (!bdev_is_zoned(FDEV(i).bdev))
4933 continue;
4934
4935 args.sbi = sbi;
4936 args.fdev = &FDEV(i);
4937 ret = blkdev_report_zones(FDEV(i).bdev, 0, BLK_ALL_ZONES,
4938 check_zone_write_pointer_cb, &args);
4939 if (ret < 0)
4940 return ret;
4941 }
4942
4943 return 0;
4944}
de881df9
AR		 4945
4946static bool is_conv_zone(struct f2fs_sb_info *sbi, unsigned int zone_idx,
4947 unsigned int dev_idx)
4948{
4949 if (!bdev_is_zoned(FDEV(dev_idx).bdev))
4950 return true;
4951 return !test_bit(zone_idx, FDEV(dev_idx).blkz_seq);
4952}
4953
4954/* Return the zone index in the given device */
4955static unsigned int get_zone_idx(struct f2fs_sb_info *sbi, unsigned int secno,
4956 int dev_idx)
4957{
4958 block_t sec_start_blkaddr = START_BLOCK(sbi, GET_SEG_FROM_SEC(sbi, secno));
4959
4960 return (sec_start_blkaddr - FDEV(dev_idx).start_blk) >>
4961 sbi->log_blocks_per_blkz;
4962}
4963
4964/*
4965 * Return the usable segments in a section based on the zone's
4966 * corresponding zone capacity. Zone is equal to a section.
4967 */
4968static inline unsigned int f2fs_usable_zone_segs_in_sec(
4969 struct f2fs_sb_info *sbi, unsigned int segno)
4970{
b771aadc 4971 unsigned int dev_idx, zone_idx;
de881df9
AR		 4972
4973 dev_idx = f2fs_target_device_index(sbi, START_BLOCK(sbi, segno));
4974 zone_idx = get_zone_idx(sbi, GET_SEC_FROM_SEG(sbi, segno), dev_idx);
4975
4976 /* Conventional zone's capacity is always equal to zone size */
4977 if (is_conv_zone(sbi, zone_idx, dev_idx))
4978 return sbi->segs_per_sec;
4979
b771aadc 4980 if (!sbi->unusable_blocks_per_sec)
de881df9
AR		 4981 return sbi->segs_per_sec;
4982
4983 /* Get the segment count beyond zone capacity block */
b771aadc
JK		 4984 return sbi->segs_per_sec - (sbi->unusable_blocks_per_sec >>
4985 sbi->log_blocks_per_seg);
de881df9
AR		 4986}
4987
4988/*
4989 * Return the number of usable blocks in a segment. The number of blocks
4990 * returned is always equal to the number of blocks in a segment for
4991 * segments fully contained within a sequential zone capacity or a
4992 * conventional zone. For segments partially contained in a sequential
4993 * zone capacity, the number of usable blocks up to the zone capacity
4994 * is returned. 0 is returned in all other cases.
4995 */
4996static inline unsigned int f2fs_usable_zone_blks_in_seg(
4997 struct f2fs_sb_info *sbi, unsigned int segno)
4998{
4999 block_t seg_start, sec_start_blkaddr, sec_cap_blkaddr;
5000 unsigned int zone_idx, dev_idx, secno;
5001
5002 secno = GET_SEC_FROM_SEG(sbi, segno);
5003 seg_start = START_BLOCK(sbi, segno);
5004 dev_idx = f2fs_target_device_index(sbi, seg_start);
5005 zone_idx = get_zone_idx(sbi, secno, dev_idx);
5006
5007 /*
5008 * Conventional zone's capacity is always equal to zone size,
5009 * so, blocks per segment is unchanged.
5010 */
5011 if (is_conv_zone(sbi, zone_idx, dev_idx))
5012 return sbi->blocks_per_seg;
5013
b771aadc 5014 if (!sbi->unusable_blocks_per_sec)
de881df9
AR		 5015 return sbi->blocks_per_seg;
5016
5017 sec_start_blkaddr = START_BLOCK(sbi, GET_SEG_FROM_SEC(sbi, secno));
b771aadc 5018 sec_cap_blkaddr = sec_start_blkaddr + CAP_BLKS_PER_SEC(sbi);
de881df9
AR		 5019
5020 /*
5021 * If segment starts before zone capacity and spans beyond
5022 * zone capacity, then usable blocks are from seg start to
5023 * zone capacity. If the segment starts after the zone capacity,
5024 * then there are no usable blocks.
5025 */
5026 if (seg_start >= sec_cap_blkaddr)
5027 return 0;
5028 if (seg_start + sbi->blocks_per_seg > sec_cap_blkaddr)
5029 return sec_cap_blkaddr - seg_start;
5030
5031 return sbi->blocks_per_seg;
5032}
c426d991
SK		 5033#else
5034int f2fs_fix_curseg_write_pointer(struct f2fs_sb_info *sbi)
5035{
5036 return 0;
5037}
d508c94e
SK		 5038
5039int f2fs_check_write_pointer(struct f2fs_sb_info *sbi)
5040{
5041 return 0;
5042}
de881df9
AR		 5043
5044static inline unsigned int f2fs_usable_zone_blks_in_seg(struct f2fs_sb_info *sbi,
5045 unsigned int segno)
5046{
5047 return 0;
5048}
5049
5050static inline unsigned int f2fs_usable_zone_segs_in_sec(struct f2fs_sb_info *sbi,
5051 unsigned int segno)
5052{
5053 return 0;
5054}
c426d991 5055#endif
de881df9
AR		 5056unsigned int f2fs_usable_blks_in_seg(struct f2fs_sb_info *sbi,
5057 unsigned int segno)
5058{
5059 if (f2fs_sb_has_blkzoned(sbi))
5060 return f2fs_usable_zone_blks_in_seg(sbi, segno);
5061
5062 return sbi->blocks_per_seg;
5063}
5064
5065unsigned int f2fs_usable_segs_in_sec(struct f2fs_sb_info *sbi,
5066 unsigned int segno)
5067{
5068 if (f2fs_sb_has_blkzoned(sbi))
5069 return f2fs_usable_zone_segs_in_sec(sbi, segno);
5070
5071 return sbi->segs_per_sec;
5072}
c426d991 5073
0a8165d7 5074/*
351df4b2
JK		 5075 * Update min, max modified time for cost-benefit GC algorithm
5076 */
5077static void init_min_max_mtime(struct f2fs_sb_info *sbi)
5078{
5079 struct sit_info *sit_i = SIT_I(sbi);
5080 unsigned int segno;
5081
3d26fa6b 5082 down_write(&sit_i->sentry_lock);
351df4b2 5083
5ad25442 5084 sit_i->min_mtime = ULLONG_MAX;
351df4b2 5085
7cd8558b 5086 for (segno = 0; segno < MAIN_SEGS(sbi); segno += sbi->segs_per_sec) {
351df4b2
JK		 5087 unsigned int i;
5088 unsigned long long mtime = 0;
5089
5090 for (i = 0; i < sbi->segs_per_sec; i++)
5091 mtime += get_seg_entry(sbi, segno + i)->mtime;
5092
5093 mtime = div_u64(mtime, sbi->segs_per_sec);
5094
5095 if (sit_i->min_mtime > mtime)
5096 sit_i->min_mtime = mtime;
5097 }
a1f72ac2 5098 sit_i->max_mtime = get_mtime(sbi, false);
093749e2 5099 sit_i->dirty_max_mtime = 0;
3d26fa6b 5100 up_write(&sit_i->sentry_lock);
351df4b2
JK		 5101}
5102
4d57b86d 5103int f2fs_build_segment_manager(struct f2fs_sb_info *sbi)
351df4b2
JK		 5104{
5105 struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
5106 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1042d60f 5107 struct f2fs_sm_info *sm_info;
351df4b2
JK		 5108 int err;
5109
acbf054d 5110 sm_info = f2fs_kzalloc(sbi, sizeof(struct f2fs_sm_info), GFP_KERNEL);
351df4b2
JK		 5111 if (!sm_info)
5112 return -ENOMEM;
5113
5114 /* init sm info */
5115 sbi->sm_info = sm_info;
351df4b2
JK		 5116 sm_info->seg0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr);
5117 sm_info->main_blkaddr = le32_to_cpu(raw_super->main_blkaddr);
5118 sm_info->segment_count = le32_to_cpu(raw_super->segment_count);
5119 sm_info->reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
5120 sm_info->ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
5121 sm_info->main_segments = le32_to_cpu(raw_super->segment_count_main);
5122 sm_info->ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
58c41035
JK		 5123 sm_info->rec_prefree_segments = sm_info->main_segments *
5124 DEF_RECLAIM_PREFREE_SEGMENTS / 100;
44a83499
JK		 5125 if (sm_info->rec_prefree_segments > DEF_MAX_RECLAIM_PREFREE_SEGMENTS)
5126 sm_info->rec_prefree_segments = DEF_MAX_RECLAIM_PREFREE_SEGMENTS;
5127
b0332a0f 5128 if (!f2fs_lfs_mode(sbi))
52763a4b 5129 sm_info->ipu_policy = 1 << F2FS_IPU_FSYNC;
216fbd64 5130 sm_info->min_ipu_util = DEF_MIN_IPU_UTIL;
c1ce1b02 5131 sm_info->min_fsync_blocks = DEF_MIN_FSYNC_BLOCKS;
dc675a97 5132 sm_info->min_seq_blocks = sbi->blocks_per_seg;
ef095d19 5133 sm_info->min_hot_blocks = DEF_MIN_HOT_BLOCKS;
a2a12b67 5134 sm_info->min_ssr_sections = reserved_sections(sbi);
351df4b2 5135
184a5cd2
CY		 5136 INIT_LIST_HEAD(&sm_info->sit_entry_set);
5137
e4544b63 5138 init_f2fs_rwsem(&sm_info->curseg_lock);
2b60311d 5139
b3d83066
CY		 5140 err = f2fs_create_flush_cmd_control(sbi);
5141 if (err)
5142 return err;
6b4afdd7 5143
0b54fb84
JK		 5144 err = create_discard_cmd_control(sbi);
5145 if (err)
5146 return err;
5147
351df4b2
JK		 5148 err = build_sit_info(sbi);
5149 if (err)
5150 return err;
5151 err = build_free_segmap(sbi);
5152 if (err)
5153 return err;
5154 err = build_curseg(sbi);
5155 if (err)
5156 return err;
5157
5158 /* reinit free segmap based on SIT */
c39a1b34
JK		 5159 err = build_sit_entries(sbi);
5160 if (err)
5161 return err;
351df4b2
JK		 5162
5163 init_free_segmap(sbi);
5164 err = build_dirty_segmap(sbi);
5165 if (err)
5166 return err;
5167
c854f4d6
CY		 5168 err = sanity_check_curseg(sbi);
5169 if (err)
5170 return err;
5171
351df4b2
JK		 5172 init_min_max_mtime(sbi);
5173 return 0;
5174}
5175
5176static void discard_dirty_segmap(struct f2fs_sb_info *sbi,
5177 enum dirty_type dirty_type)
5178{
5179 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
5180
5181 mutex_lock(&dirty_i->seglist_lock);
39307a8e 5182 kvfree(dirty_i->dirty_segmap[dirty_type]);
351df4b2
JK		 5183 dirty_i->nr_dirty[dirty_type] = 0;
5184 mutex_unlock(&dirty_i->seglist_lock);
5185}
5186
5ec4e49f 5187static void destroy_victim_secmap(struct f2fs_sb_info *sbi)
351df4b2
JK		 5188{
5189 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
5f029c04 5190
71419129 5191 kvfree(dirty_i->pinned_secmap);
39307a8e 5192 kvfree(dirty_i->victim_secmap);
351df4b2
JK		 5193}
5194
5195static void destroy_dirty_segmap(struct f2fs_sb_info *sbi)
5196{
5197 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
5198 int i;
5199
5200 if (!dirty_i)
5201 return;
5202
5203 /* discard pre-free/dirty segments list */
5204 for (i = 0; i < NR_DIRTY_TYPE; i++)
5205 discard_dirty_segmap(sbi, i);
5206
da52f8ad
JQ		 5207 if (__is_large_section(sbi)) {
5208 mutex_lock(&dirty_i->seglist_lock);
5209 kvfree(dirty_i->dirty_secmap);
5210 mutex_unlock(&dirty_i->seglist_lock);
5211 }
5212
5ec4e49f 5213 destroy_victim_secmap(sbi);
351df4b2 5214 SM_I(sbi)->dirty_info = NULL;
c8eb7024 5215 kfree(dirty_i);
351df4b2
JK		 5216}
5217
5218static void destroy_curseg(struct f2fs_sb_info *sbi)
5219{
5220 struct curseg_info *array = SM_I(sbi)->curseg_array;
5221 int i;
5222
5223 if (!array)
5224 return;
5225 SM_I(sbi)->curseg_array = NULL;
b7ad7512 5226 for (i = 0; i < NR_CURSEG_TYPE; i++) {
c8eb7024
CY		 5227 kfree(array[i].sum_blk);
5228 kfree(array[i].journal);
b7ad7512 5229 }
c8eb7024 5230 kfree(array);
351df4b2
JK		 5231}
5232
5233static void destroy_free_segmap(struct f2fs_sb_info *sbi)
5234{
5235 struct free_segmap_info *free_i = SM_I(sbi)->free_info;
5f029c04 5236
351df4b2
JK		 5237 if (!free_i)
5238 return;
5239 SM_I(sbi)->free_info = NULL;
39307a8e
JK		 5240 kvfree(free_i->free_segmap);
5241 kvfree(free_i->free_secmap);
c8eb7024 5242 kfree(free_i);
351df4b2
JK		 5243}
5244
5245static void destroy_sit_info(struct f2fs_sb_info *sbi)
5246{
5247 struct sit_info *sit_i = SIT_I(sbi);
351df4b2
JK		 5248
5249 if (!sit_i)
5250 return;
5251
2fde3dd1
CY		 5252 if (sit_i->sentries)
5253 kvfree(sit_i->bitmap);
c8eb7024 5254 kfree(sit_i->tmp_map);
60a3b782 5255
39307a8e
JK		 5256 kvfree(sit_i->sentries);
5257 kvfree(sit_i->sec_entries);
5258 kvfree(sit_i->dirty_sentries_bitmap);
351df4b2
JK		 5259
5260 SM_I(sbi)->sit_info = NULL;
5222595d 5261 kvfree(sit_i->sit_bitmap);
ae27d62e 5262#ifdef CONFIG_F2FS_CHECK_FS
5222595d 5263 kvfree(sit_i->sit_bitmap_mir);
bbf9f7d9 5264 kvfree(sit_i->invalid_segmap);
ae27d62e 5265#endif
c8eb7024 5266 kfree(sit_i);
351df4b2
JK		 5267}
5268
4d57b86d 5269void f2fs_destroy_segment_manager(struct f2fs_sb_info *sbi)
351df4b2
JK		 5270{
5271 struct f2fs_sm_info *sm_info = SM_I(sbi);
a688b9d9 5272
3b03f724
CY		 5273 if (!sm_info)
5274 return;
4d57b86d 5275 f2fs_destroy_flush_cmd_control(sbi, true);
f099405f 5276 destroy_discard_cmd_control(sbi);
351df4b2
JK		 5277 destroy_dirty_segmap(sbi);
5278 destroy_curseg(sbi);
5279 destroy_free_segmap(sbi);
5280 destroy_sit_info(sbi);
5281 sbi->sm_info = NULL;
c8eb7024 5282 kfree(sm_info);
351df4b2 5283}
7fd9e544 5284
4d57b86d 5285int __init f2fs_create_segment_manager_caches(void)
7fd9e544 5286{
98510003 5287 discard_entry_slab = f2fs_kmem_cache_create("f2fs_discard_entry",
e8512d2e 5288 sizeof(struct discard_entry));
7fd9e544 5289 if (!discard_entry_slab)
184a5cd2
CY		 5290 goto fail;
5291
98510003 5292 discard_cmd_slab = f2fs_kmem_cache_create("f2fs_discard_cmd",
b01a9201
JK		 5293 sizeof(struct discard_cmd));
5294 if (!discard_cmd_slab)
6ab2a308 5295 goto destroy_discard_entry;
275b66b0 5296
98510003 5297 sit_entry_set_slab = f2fs_kmem_cache_create("f2fs_sit_entry_set",
c9ee0085 5298 sizeof(struct sit_entry_set));
184a5cd2 5299 if (!sit_entry_set_slab)
b01a9201 5300 goto destroy_discard_cmd;
88b88a66 5301
3db1de0e
DJ		 5302 revoke_entry_slab = f2fs_kmem_cache_create("f2fs_revoke_entry",
5303 sizeof(struct revoke_entry));
5304 if (!revoke_entry_slab)
88b88a66 5305 goto destroy_sit_entry_set;
7fd9e544 5306 return 0;
184a5cd2 5307
88b88a66
JK		 5308destroy_sit_entry_set:
5309 kmem_cache_destroy(sit_entry_set_slab);
b01a9201
JK		 5310destroy_discard_cmd:
5311 kmem_cache_destroy(discard_cmd_slab);
6ab2a308 5312destroy_discard_entry:
184a5cd2
CY		 5313 kmem_cache_destroy(discard_entry_slab);
5314fail:
5315 return -ENOMEM;
7fd9e544
JK		 5316}
5317
4d57b86d 5318void f2fs_destroy_segment_manager_caches(void)
7fd9e544 5319{
184a5cd2 5320 kmem_cache_destroy(sit_entry_set_slab);
b01a9201 5321 kmem_cache_destroy(discard_cmd_slab);
7fd9e544 5322 kmem_cache_destroy(discard_entry_slab);
3db1de0e 5323 kmem_cache_destroy(revoke_entry_slab);
7fd9e544 5324}
Linux 6.x block layer and io_uring tree(s)