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Merge branch 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild
[linux.git] / fs / f2fs / segment.c
CommitLineData
0a8165d7 1/*
351df4b2
JK		 2 * fs/f2fs/segment.c
3 *
4 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
5 * http://www.samsung.com/
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11#include <linux/fs.h>
12#include <linux/f2fs_fs.h>
13#include <linux/bio.h>
14#include <linux/blkdev.h>
690e4a3e 15#include <linux/prefetch.h>
6b4afdd7 16#include <linux/kthread.h>
351df4b2 17#include <linux/vmalloc.h>
74de593a 18#include <linux/swap.h>
351df4b2
JK		 19
20#include "f2fs.h"
21#include "segment.h"
22#include "node.h"
9e4ded3f 23#include "trace.h"
6ec178da 24#include <trace/events/f2fs.h>
351df4b2 25
9a7f143a
CL		 26#define __reverse_ffz(x) __reverse_ffs(~(x))
27
7fd9e544 28static struct kmem_cache *discard_entry_slab;
184a5cd2 29static struct kmem_cache *sit_entry_set_slab;
88b88a66 30static struct kmem_cache *inmem_entry_slab;
7fd9e544 31
9a7f143a
CL		 32/*
33 * __reverse_ffs is copied from include/asm-generic/bitops/__ffs.h since
34 * MSB and LSB are reversed in a byte by f2fs_set_bit.
35 */
36static inline unsigned long __reverse_ffs(unsigned long word)
37{
38 int num = 0;
39
40#if BITS_PER_LONG == 64
41 if ((word & 0xffffffff) == 0) {
42 num += 32;
43 word >>= 32;
44 }
45#endif
46 if ((word & 0xffff) == 0) {
47 num += 16;
48 word >>= 16;
49 }
50 if ((word & 0xff) == 0) {
51 num += 8;
52 word >>= 8;
53 }
54 if ((word & 0xf0) == 0)
55 num += 4;
56 else
57 word >>= 4;
58 if ((word & 0xc) == 0)
59 num += 2;
60 else
61 word >>= 2;
62 if ((word & 0x2) == 0)
63 num += 1;
64 return num;
65}
66
67/*
e1c42045 68 * __find_rev_next(_zero)_bit is copied from lib/find_next_bit.c because
9a7f143a
CL		 69 * f2fs_set_bit makes MSB and LSB reversed in a byte.
70 * Example:
71 * LSB <--> MSB
72 * f2fs_set_bit(0, bitmap) => 0000 0001
73 * f2fs_set_bit(7, bitmap) => 1000 0000
74 */
75static unsigned long __find_rev_next_bit(const unsigned long *addr,
76 unsigned long size, unsigned long offset)
77{
e19ef527
JK		 78 while (!f2fs_test_bit(offset, (unsigned char *)addr))
79 offset++;
80
81 if (offset > size)
82 offset = size;
83
84 return offset;
85#if 0
9a7f143a
CL		 86 const unsigned long *p = addr + BIT_WORD(offset);
87 unsigned long result = offset & ~(BITS_PER_LONG - 1);
88 unsigned long tmp;
89 unsigned long mask, submask;
90 unsigned long quot, rest;
91
92 if (offset >= size)
93 return size;
94
95 size -= result;
96 offset %= BITS_PER_LONG;
97 if (!offset)
98 goto aligned;
99
100 tmp = *(p++);
101 quot = (offset >> 3) << 3;
102 rest = offset & 0x7;
103 mask = ~0UL << quot;
104 submask = (unsigned char)(0xff << rest) >> rest;
105 submask <<= quot;
106 mask &= submask;
107 tmp &= mask;
108 if (size < BITS_PER_LONG)
109 goto found_first;
110 if (tmp)
111 goto found_middle;
112
113 size -= BITS_PER_LONG;
114 result += BITS_PER_LONG;
115aligned:
116 while (size & ~(BITS_PER_LONG-1)) {
117 tmp = *(p++);
118 if (tmp)
119 goto found_middle;
120 result += BITS_PER_LONG;
121 size -= BITS_PER_LONG;
122 }
123 if (!size)
124 return result;
125 tmp = *p;
126found_first:
127 tmp &= (~0UL >> (BITS_PER_LONG - size));
128 if (tmp == 0UL) /* Are any bits set? */
129 return result + size; /* Nope. */
130found_middle:
131 return result + __reverse_ffs(tmp);
e19ef527 132#endif
9a7f143a
CL		 133}
134
135static unsigned long __find_rev_next_zero_bit(const unsigned long *addr,
136 unsigned long size, unsigned long offset)
137{
e19ef527
JK		 138 while (f2fs_test_bit(offset, (unsigned char *)addr))
139 offset++;
140
141 if (offset > size)
142 offset = size;
143
144 return offset;
145#if 0
9a7f143a
CL		 146 const unsigned long *p = addr + BIT_WORD(offset);
147 unsigned long result = offset & ~(BITS_PER_LONG - 1);
148 unsigned long tmp;
149 unsigned long mask, submask;
150 unsigned long quot, rest;
151
152 if (offset >= size)
153 return size;
154
155 size -= result;
156 offset %= BITS_PER_LONG;
157 if (!offset)
158 goto aligned;
159
160 tmp = *(p++);
161 quot = (offset >> 3) << 3;
162 rest = offset & 0x7;
163 mask = ~(~0UL << quot);
164 submask = (unsigned char)~((unsigned char)(0xff << rest) >> rest);
165 submask <<= quot;
166 mask += submask;
167 tmp |= mask;
168 if (size < BITS_PER_LONG)
169 goto found_first;
170 if (~tmp)
171 goto found_middle;
172
173 size -= BITS_PER_LONG;
174 result += BITS_PER_LONG;
175aligned:
176 while (size & ~(BITS_PER_LONG - 1)) {
177 tmp = *(p++);
178 if (~tmp)
179 goto found_middle;
180 result += BITS_PER_LONG;
181 size -= BITS_PER_LONG;
182 }
183 if (!size)
184 return result;
185 tmp = *p;
186
187found_first:
188 tmp |= ~0UL << size;
189 if (tmp == ~0UL) /* Are any bits zero? */
190 return result + size; /* Nope. */
191found_middle:
192 return result + __reverse_ffz(tmp);
e19ef527 193#endif
9a7f143a
CL		 194}
195
88b88a66
JK		 196void register_inmem_page(struct inode *inode, struct page *page)
197{
198 struct f2fs_inode_info *fi = F2FS_I(inode);
199 struct inmem_pages *new;
34ba94ba 200 int err;
9be32d72 201
0722b101 202 SetPagePrivate(page);
9e4ded3f 203 f2fs_trace_pid(page);
0722b101 204
88b88a66
JK		 205 new = f2fs_kmem_cache_alloc(inmem_entry_slab, GFP_NOFS);
206
207 /* add atomic page indices to the list */
208 new->page = page;
209 INIT_LIST_HEAD(&new->list);
9be32d72 210retry:
88b88a66
JK		 211 /* increase reference count with clean state */
212 mutex_lock(&fi->inmem_lock);
34ba94ba
JK		 213 err = radix_tree_insert(&fi->inmem_root, page->index, new);
214 if (err == -EEXIST) {
215 mutex_unlock(&fi->inmem_lock);
216 kmem_cache_free(inmem_entry_slab, new);
217 return;
218 } else if (err) {
219 mutex_unlock(&fi->inmem_lock);
34ba94ba
JK		 220 goto retry;
221 }
88b88a66
JK		 222 get_page(page);
223 list_add_tail(&new->list, &fi->inmem_pages);
8dcf2ff7 224 inc_page_count(F2FS_I_SB(inode), F2FS_INMEM_PAGES);
88b88a66 225 mutex_unlock(&fi->inmem_lock);
8ce67cb0
JK		 226
227 trace_f2fs_register_inmem_page(page, INMEM);
88b88a66
JK		 228}
229
230void commit_inmem_pages(struct inode *inode, bool abort)
231{
232 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
233 struct f2fs_inode_info *fi = F2FS_I(inode);
234 struct inmem_pages *cur, *tmp;
235 bool submit_bio = false;
236 struct f2fs_io_info fio = {
05ca3632 237 .sbi = sbi,
88b88a66 238 .type = DATA,
1e84371f 239 .rw = WRITE_SYNC | REQ_PRIO,
4375a336 240 .encrypted_page = NULL,
88b88a66
JK		 241 };
242
0341845e
JK		 243 /*
244 * The abort is true only when f2fs_evict_inode is called.
245 * Basically, the f2fs_evict_inode doesn't produce any data writes, so
246 * that we don't need to call f2fs_balance_fs.
247 * Otherwise, f2fs_gc in f2fs_balance_fs can wait forever until this
248 * inode becomes free by iget_locked in f2fs_iget.
249 */
70c640b1 250 if (!abort) {
0341845e 251 f2fs_balance_fs(sbi);
70c640b1
JK		 252 f2fs_lock_op(sbi);
253 }
88b88a66
JK		 254
255 mutex_lock(&fi->inmem_lock);
256 list_for_each_entry_safe(cur, tmp, &fi->inmem_pages, list) {
70c640b1
JK		 257 if (!abort) {
258 lock_page(cur->page);
259 if (cur->page->mapping == inode->i_mapping) {
260 f2fs_wait_on_page_writeback(cur->page, DATA);
261 if (clear_page_dirty_for_io(cur->page))
262 inode_dec_dirty_pages(inode);
8ce67cb0 263 trace_f2fs_commit_inmem_page(cur->page, INMEM);
05ca3632
JK		 264 fio.page = cur->page;
265 do_write_data_page(&fio);
70c640b1
JK		 266 submit_bio = true;
267 }
268 f2fs_put_page(cur->page, 1);
269 } else {
8ce67cb0 270 trace_f2fs_commit_inmem_page(cur->page, INMEM_DROP);
70c640b1 271 put_page(cur->page);
88b88a66 272 }
34ba94ba 273 radix_tree_delete(&fi->inmem_root, cur->page->index);
88b88a66
JK		 274 list_del(&cur->list);
275 kmem_cache_free(inmem_entry_slab, cur);
8dcf2ff7 276 dec_page_count(F2FS_I_SB(inode), F2FS_INMEM_PAGES);
88b88a66 277 }
88b88a66
JK		 278 mutex_unlock(&fi->inmem_lock);
279
70c640b1
JK		 280 if (!abort) {
281 f2fs_unlock_op(sbi);
282 if (submit_bio)
283 f2fs_submit_merged_bio(sbi, DATA, WRITE);
284 }
88b88a66
JK		 285}
286
0a8165d7 287/*
351df4b2
JK		 288 * This function balances dirty node and dentry pages.
289 * In addition, it controls garbage collection.
290 */
291void f2fs_balance_fs(struct f2fs_sb_info *sbi)
292{
351df4b2 293 /*
029cd28c
JK		 294 * We should do GC or end up with checkpoint, if there are so many dirty
295 * dir/node pages without enough free segments.
351df4b2 296 */
43727527 297 if (has_not_enough_free_secs(sbi, 0)) {
351df4b2 298 mutex_lock(&sbi->gc_mutex);
408e9375 299 f2fs_gc(sbi);
351df4b2
JK		 300 }
301}
302
4660f9c0
JK		 303void f2fs_balance_fs_bg(struct f2fs_sb_info *sbi)
304{
1dcc336b
CY		 305 /* try to shrink extent cache when there is no enough memory */
306 f2fs_shrink_extent_tree(sbi, EXTENT_CACHE_SHRINK_NUMBER);
307
4660f9c0
JK		 308 /* check the # of cached NAT entries and prefree segments */
309 if (try_to_free_nats(sbi, NAT_ENTRY_PER_BLOCK) ||
e5e7ea3c 310 excess_prefree_segs(sbi) ||
88a70a69 311 !available_free_memory(sbi, INO_ENTRIES))
4660f9c0
JK		 312 f2fs_sync_fs(sbi->sb, true);
313}
314
2163d198 315static int issue_flush_thread(void *data)
6b4afdd7
JK		 316{
317 struct f2fs_sb_info *sbi = data;
a688b9d9
GZ		 318 struct flush_cmd_control *fcc = SM_I(sbi)->cmd_control_info;
319 wait_queue_head_t *q = &fcc->flush_wait_queue;
6b4afdd7
JK		 320repeat:
321 if (kthread_should_stop())
322 return 0;
323
721bd4d5 324 if (!llist_empty(&fcc->issue_list)) {
6b4afdd7
JK		 325 struct bio *bio = bio_alloc(GFP_NOIO, 0);
326 struct flush_cmd *cmd, *next;
327 int ret;
328
721bd4d5
GZ		 329 fcc->dispatch_list = llist_del_all(&fcc->issue_list);
330 fcc->dispatch_list = llist_reverse_order(fcc->dispatch_list);
331
6b4afdd7
JK		 332 bio->bi_bdev = sbi->sb->s_bdev;
333 ret = submit_bio_wait(WRITE_FLUSH, bio);
334
721bd4d5
GZ		 335 llist_for_each_entry_safe(cmd, next,
336 fcc->dispatch_list, llnode) {
6b4afdd7 337 cmd->ret = ret;
6b4afdd7
JK		 338 complete(&cmd->wait);
339 }
a4ed23f2 340 bio_put(bio);
a688b9d9 341 fcc->dispatch_list = NULL;
6b4afdd7
JK		 342 }
343
a688b9d9 344 wait_event_interruptible(*q,
721bd4d5 345 kthread_should_stop() || !llist_empty(&fcc->issue_list));
6b4afdd7
JK		 346 goto repeat;
347}
348
349int f2fs_issue_flush(struct f2fs_sb_info *sbi)
350{
a688b9d9 351 struct flush_cmd_control *fcc = SM_I(sbi)->cmd_control_info;
adf8d90b 352 struct flush_cmd cmd;
6b4afdd7 353
24a9ee0f
JK		 354 trace_f2fs_issue_flush(sbi->sb, test_opt(sbi, NOBARRIER),
355 test_opt(sbi, FLUSH_MERGE));
356
0f7b2abd
JK		 357 if (test_opt(sbi, NOBARRIER))
358 return 0;
359
6b4afdd7
JK		 360 if (!test_opt(sbi, FLUSH_MERGE))
361 return blkdev_issue_flush(sbi->sb->s_bdev, GFP_KERNEL, NULL);
362
adf8d90b 363 init_completion(&cmd.wait);
6b4afdd7 364
721bd4d5 365 llist_add(&cmd.llnode, &fcc->issue_list);
6b4afdd7 366
a688b9d9
GZ		 367 if (!fcc->dispatch_list)
368 wake_up(&fcc->flush_wait_queue);
6b4afdd7 369
adf8d90b
CY		 370 wait_for_completion(&cmd.wait);
371
372 return cmd.ret;
6b4afdd7
JK		 373}
374
2163d198
GZ		 375int create_flush_cmd_control(struct f2fs_sb_info *sbi)
376{
377 dev_t dev = sbi->sb->s_bdev->bd_dev;
378 struct flush_cmd_control *fcc;
379 int err = 0;
380
381 fcc = kzalloc(sizeof(struct flush_cmd_control), GFP_KERNEL);
382 if (!fcc)
383 return -ENOMEM;
2163d198 384 init_waitqueue_head(&fcc->flush_wait_queue);
721bd4d5 385 init_llist_head(&fcc->issue_list);
6b2920a5 386 SM_I(sbi)->cmd_control_info = fcc;
2163d198
GZ		 387 fcc->f2fs_issue_flush = kthread_run(issue_flush_thread, sbi,
388 "f2fs_flush-%u:%u", MAJOR(dev), MINOR(dev));
389 if (IS_ERR(fcc->f2fs_issue_flush)) {
390 err = PTR_ERR(fcc->f2fs_issue_flush);
391 kfree(fcc);
6b2920a5 392 SM_I(sbi)->cmd_control_info = NULL;
2163d198
GZ		 393 return err;
394 }
2163d198
GZ		 395
396 return err;
397}
398
399void destroy_flush_cmd_control(struct f2fs_sb_info *sbi)
400{
6b2920a5 401 struct flush_cmd_control *fcc = SM_I(sbi)->cmd_control_info;
2163d198
GZ		 402
403 if (fcc && fcc->f2fs_issue_flush)
404 kthread_stop(fcc->f2fs_issue_flush);
405 kfree(fcc);
6b2920a5 406 SM_I(sbi)->cmd_control_info = NULL;
2163d198
GZ		 407}
408
351df4b2
JK		 409static void __locate_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno,
410 enum dirty_type dirty_type)
411{
412 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
413
414 /* need not be added */
415 if (IS_CURSEG(sbi, segno))
416 return;
417
418 if (!test_and_set_bit(segno, dirty_i->dirty_segmap[dirty_type]))
419 dirty_i->nr_dirty[dirty_type]++;
420
421 if (dirty_type == DIRTY) {
422 struct seg_entry *sentry = get_seg_entry(sbi, segno);
4625d6aa 423 enum dirty_type t = sentry->type;
b2f2c390 424
ec325b52
JK		 425 if (unlikely(t >= DIRTY)) {
426 f2fs_bug_on(sbi, 1);
427 return;
428 }
4625d6aa
CL		 429 if (!test_and_set_bit(segno, dirty_i->dirty_segmap[t]))
430 dirty_i->nr_dirty[t]++;
351df4b2
JK		 431 }
432}
433
434static void __remove_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno,
435 enum dirty_type dirty_type)
436{
437 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
438
439 if (test_and_clear_bit(segno, dirty_i->dirty_segmap[dirty_type]))
440 dirty_i->nr_dirty[dirty_type]--;
441
442 if (dirty_type == DIRTY) {
4625d6aa
CL		 443 struct seg_entry *sentry = get_seg_entry(sbi, segno);
444 enum dirty_type t = sentry->type;
445
446 if (test_and_clear_bit(segno, dirty_i->dirty_segmap[t]))
447 dirty_i->nr_dirty[t]--;
b2f2c390 448
5ec4e49f
JK		 449 if (get_valid_blocks(sbi, segno, sbi->segs_per_sec) == 0)
450 clear_bit(GET_SECNO(sbi, segno),
451 dirty_i->victim_secmap);
351df4b2
JK		 452 }
453}
454
0a8165d7 455/*
351df4b2
JK		 456 * Should not occur error such as -ENOMEM.
457 * Adding dirty entry into seglist is not critical operation.
458 * If a given segment is one of current working segments, it won't be added.
459 */
8d8451af 460static void locate_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno)
351df4b2
JK		 461{
462 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
463 unsigned short valid_blocks;
464
465 if (segno == NULL_SEGNO || IS_CURSEG(sbi, segno))
466 return;
467
468 mutex_lock(&dirty_i->seglist_lock);
469
470 valid_blocks = get_valid_blocks(sbi, segno, 0);
471
472 if (valid_blocks == 0) {
473 __locate_dirty_segment(sbi, segno, PRE);
474 __remove_dirty_segment(sbi, segno, DIRTY);
475 } else if (valid_blocks < sbi->blocks_per_seg) {
476 __locate_dirty_segment(sbi, segno, DIRTY);
477 } else {
478 /* Recovery routine with SSR needs this */
479 __remove_dirty_segment(sbi, segno, DIRTY);
480 }
481
482 mutex_unlock(&dirty_i->seglist_lock);
351df4b2
JK		 483}
484
1e87a78d 485static int f2fs_issue_discard(struct f2fs_sb_info *sbi,
37208879
JK		 486 block_t blkstart, block_t blklen)
487{
55cf9cb6
CY		 488 sector_t start = SECTOR_FROM_BLOCK(blkstart);
489 sector_t len = SECTOR_FROM_BLOCK(blklen);
a66cdd98
JK		 490 struct seg_entry *se;
491 unsigned int offset;
492 block_t i;
493
494 for (i = blkstart; i < blkstart + blklen; i++) {
495 se = get_seg_entry(sbi, GET_SEGNO(sbi, i));
496 offset = GET_BLKOFF_FROM_SEG0(sbi, i);
497
498 if (!f2fs_test_and_set_bit(offset, se->discard_map))
499 sbi->discard_blks--;
500 }
1661d07c 501 trace_f2fs_issue_discard(sbi->sb, blkstart, blklen);
1e87a78d
JK		 502 return blkdev_issue_discard(sbi->sb->s_bdev, start, len, GFP_NOFS, 0);
503}
504
cf2271e7 505void discard_next_dnode(struct f2fs_sb_info *sbi, block_t blkaddr)
1e87a78d 506{
40a02be1
JK		 507 int err = -ENOTSUPP;
508
509 if (test_opt(sbi, DISCARD)) {
510 struct seg_entry *se = get_seg_entry(sbi,
511 GET_SEGNO(sbi, blkaddr));
512 unsigned int offset = GET_BLKOFF_FROM_SEG0(sbi, blkaddr);
513
514 if (f2fs_test_bit(offset, se->discard_map))
515 return;
516
517 err = f2fs_issue_discard(sbi, blkaddr, 1);
518 }
519
381722d2
CY		 520 if (err)
521 update_meta_page(sbi, NULL, blkaddr);
37208879
JK		 522}
523
adf4983b 524static void __add_discard_entry(struct f2fs_sb_info *sbi,
a66cdd98
JK		 525 struct cp_control *cpc, struct seg_entry *se,
526 unsigned int start, unsigned int end)
b2955550
JK		 527{
528 struct list_head *head = &SM_I(sbi)->discard_list;
adf4983b
JK		 529 struct discard_entry *new, *last;
530
531 if (!list_empty(head)) {
532 last = list_last_entry(head, struct discard_entry, list);
533 if (START_BLOCK(sbi, cpc->trim_start) + start ==
534 last->blkaddr + last->len) {
535 last->len += end - start;
536 goto done;
537 }
538 }
539
540 new = f2fs_kmem_cache_alloc(discard_entry_slab, GFP_NOFS);
541 INIT_LIST_HEAD(&new->list);
542 new->blkaddr = START_BLOCK(sbi, cpc->trim_start) + start;
543 new->len = end - start;
544 list_add_tail(&new->list, head);
545done:
546 SM_I(sbi)->nr_discards += end - start;
adf4983b
JK		 547}
548
549static void add_discard_addrs(struct f2fs_sb_info *sbi, struct cp_control *cpc)
550{
b2955550
JK		 551 int entries = SIT_VBLOCK_MAP_SIZE / sizeof(unsigned long);
552 int max_blocks = sbi->blocks_per_seg;
4b2fecc8 553 struct seg_entry *se = get_seg_entry(sbi, cpc->trim_start);
b2955550
JK		 554 unsigned long *cur_map = (unsigned long *)se->cur_valid_map;
555 unsigned long *ckpt_map = (unsigned long *)se->ckpt_valid_map;
a66cdd98 556 unsigned long *discard_map = (unsigned long *)se->discard_map;
60a3b782 557 unsigned long *dmap = SIT_I(sbi)->tmp_map;
b2955550 558 unsigned int start = 0, end = -1;
4b2fecc8 559 bool force = (cpc->reason == CP_DISCARD);
b2955550
JK		 560 int i;
561
a66cdd98 562 if (se->valid_blocks == max_blocks)
b2955550
JK		 563 return;
564
a66cdd98
JK		 565 if (!force) {
566 if (!test_opt(sbi, DISCARD) || !se->valid_blocks ||
912a83b5
DC		 567 SM_I(sbi)->nr_discards >= SM_I(sbi)->max_discards)
568 return;
4b2fecc8
JK		 569 }
570
b2955550
JK		 571 /* SIT_VBLOCK_MAP_SIZE should be multiple of sizeof(unsigned long) */
572 for (i = 0; i < entries; i++)
a66cdd98 573 dmap[i] = force ? ~ckpt_map[i] & ~discard_map[i] :
d7bc2484 574 (cur_map[i] ^ ckpt_map[i]) & ckpt_map[i];
b2955550 575
4b2fecc8 576 while (force || SM_I(sbi)->nr_discards <= SM_I(sbi)->max_discards) {
b2955550
JK		 577 start = __find_rev_next_bit(dmap, max_blocks, end + 1);
578 if (start >= max_blocks)
579 break;
580
581 end = __find_rev_next_zero_bit(dmap, max_blocks, start + 1);
a66cdd98 582 __add_discard_entry(sbi, cpc, se, start, end);
b2955550
JK		 583 }
584}
585
4b2fecc8
JK		 586void release_discard_addrs(struct f2fs_sb_info *sbi)
587{
588 struct list_head *head = &(SM_I(sbi)->discard_list);
589 struct discard_entry *entry, *this;
590
591 /* drop caches */
592 list_for_each_entry_safe(entry, this, head, list) {
593 list_del(&entry->list);
594 kmem_cache_free(discard_entry_slab, entry);
595 }
596}
597
0a8165d7 598/*
351df4b2
JK		 599 * Should call clear_prefree_segments after checkpoint is done.
600 */
601static void set_prefree_as_free_segments(struct f2fs_sb_info *sbi)
602{
603 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
b65ee148 604 unsigned int segno;
351df4b2
JK		 605
606 mutex_lock(&dirty_i->seglist_lock);
7cd8558b 607 for_each_set_bit(segno, dirty_i->dirty_segmap[PRE], MAIN_SEGS(sbi))
351df4b2 608 __set_test_and_free(sbi, segno);
351df4b2
JK		 609 mutex_unlock(&dirty_i->seglist_lock);
610}
611
836b5a63 612void clear_prefree_segments(struct f2fs_sb_info *sbi, struct cp_control *cpc)
351df4b2 613{
b2955550 614 struct list_head *head = &(SM_I(sbi)->discard_list);
2d7b822a 615 struct discard_entry *entry, *this;
351df4b2 616 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
29e59c14 617 unsigned long *prefree_map = dirty_i->dirty_segmap[PRE];
29e59c14 618 unsigned int start = 0, end = -1;
351df4b2
JK		 619
620 mutex_lock(&dirty_i->seglist_lock);
29e59c14 621
351df4b2 622 while (1) {
29e59c14 623 int i;
7cd8558b
JK		 624 start = find_next_bit(prefree_map, MAIN_SEGS(sbi), end + 1);
625 if (start >= MAIN_SEGS(sbi))
351df4b2 626 break;
7cd8558b
JK		 627 end = find_next_zero_bit(prefree_map, MAIN_SEGS(sbi),
628 start + 1);
29e59c14
CL		 629
630 for (i = start; i < end; i++)
631 clear_bit(i, prefree_map);
632
633 dirty_i->nr_dirty[PRE] -= end - start;
634
635 if (!test_opt(sbi, DISCARD))
636 continue;
351df4b2 637
37208879
JK		 638 f2fs_issue_discard(sbi, START_BLOCK(sbi, start),
639 (end - start) << sbi->log_blocks_per_seg);
351df4b2
JK		 640 }
641 mutex_unlock(&dirty_i->seglist_lock);
b2955550
JK		 642
643 /* send small discards */
2d7b822a 644 list_for_each_entry_safe(entry, this, head, list) {
836b5a63
JK		 645 if (cpc->reason == CP_DISCARD && entry->len < cpc->trim_minlen)
646 goto skip;
37208879 647 f2fs_issue_discard(sbi, entry->blkaddr, entry->len);
f56aa1c5 648 cpc->trimmed += entry->len;
836b5a63 649skip:
b2955550
JK		 650 list_del(&entry->list);
651 SM_I(sbi)->nr_discards -= entry->len;
652 kmem_cache_free(discard_entry_slab, entry);
653 }
351df4b2
JK		 654}
655
184a5cd2 656static bool __mark_sit_entry_dirty(struct f2fs_sb_info *sbi, unsigned int segno)
351df4b2
JK		 657{
658 struct sit_info *sit_i = SIT_I(sbi);
184a5cd2
CY		 659
660 if (!__test_and_set_bit(segno, sit_i->dirty_sentries_bitmap)) {
351df4b2 661 sit_i->dirty_sentries++;
184a5cd2
CY		 662 return false;
663 }
664
665 return true;
351df4b2
JK		 666}
667
668static void __set_sit_entry_type(struct f2fs_sb_info *sbi, int type,
669 unsigned int segno, int modified)
670{
671 struct seg_entry *se = get_seg_entry(sbi, segno);
672 se->type = type;
673 if (modified)
674 __mark_sit_entry_dirty(sbi, segno);
675}
676
677static void update_sit_entry(struct f2fs_sb_info *sbi, block_t blkaddr, int del)
678{
679 struct seg_entry *se;
680 unsigned int segno, offset;
681 long int new_vblocks;
682
683 segno = GET_SEGNO(sbi, blkaddr);
684
685 se = get_seg_entry(sbi, segno);
686 new_vblocks = se->valid_blocks + del;
491c0854 687 offset = GET_BLKOFF_FROM_SEG0(sbi, blkaddr);
351df4b2 688
9850cf4a 689 f2fs_bug_on(sbi, (new_vblocks >> (sizeof(unsigned short) << 3) ||
351df4b2
JK		 690 (new_vblocks > sbi->blocks_per_seg)));
691
692 se->valid_blocks = new_vblocks;
693 se->mtime = get_mtime(sbi);
694 SIT_I(sbi)->max_mtime = se->mtime;
695
696 /* Update valid block bitmap */
697 if (del > 0) {
52aca074 698 if (f2fs_test_and_set_bit(offset, se->cur_valid_map))
05796763 699 f2fs_bug_on(sbi, 1);
a66cdd98
JK		 700 if (!f2fs_test_and_set_bit(offset, se->discard_map))
701 sbi->discard_blks--;
351df4b2 702 } else {
52aca074 703 if (!f2fs_test_and_clear_bit(offset, se->cur_valid_map))
05796763 704 f2fs_bug_on(sbi, 1);
a66cdd98
JK		 705 if (f2fs_test_and_clear_bit(offset, se->discard_map))
706 sbi->discard_blks++;
351df4b2
JK		 707 }
708 if (!f2fs_test_bit(offset, se->ckpt_valid_map))
709 se->ckpt_valid_blocks += del;
710
711 __mark_sit_entry_dirty(sbi, segno);
712
713 /* update total number of valid blocks to be written in ckpt area */
714 SIT_I(sbi)->written_valid_blocks += del;
715
716 if (sbi->segs_per_sec > 1)
717 get_sec_entry(sbi, segno)->valid_blocks += del;
718}
719
5e443818 720void refresh_sit_entry(struct f2fs_sb_info *sbi, block_t old, block_t new)
351df4b2 721{
5e443818
JK		 722 update_sit_entry(sbi, new, 1);
723 if (GET_SEGNO(sbi, old) != NULL_SEGNO)
724 update_sit_entry(sbi, old, -1);
725
726 locate_dirty_segment(sbi, GET_SEGNO(sbi, old));
727 locate_dirty_segment(sbi, GET_SEGNO(sbi, new));
351df4b2
JK		 728}
729
730void invalidate_blocks(struct f2fs_sb_info *sbi, block_t addr)
731{
732 unsigned int segno = GET_SEGNO(sbi, addr);
733 struct sit_info *sit_i = SIT_I(sbi);
734
9850cf4a 735 f2fs_bug_on(sbi, addr == NULL_ADDR);
351df4b2
JK		 736 if (addr == NEW_ADDR)
737 return;
738
739 /* add it into sit main buffer */
740 mutex_lock(&sit_i->sentry_lock);
741
742 update_sit_entry(sbi, addr, -1);
743
744 /* add it into dirty seglist */
745 locate_dirty_segment(sbi, segno);
746
747 mutex_unlock(&sit_i->sentry_lock);
748}
749
0a8165d7 750/*
351df4b2
JK		 751 * This function should be resided under the curseg_mutex lock
752 */
753static void __add_sum_entry(struct f2fs_sb_info *sbi, int type,
e79efe3b 754 struct f2fs_summary *sum)
351df4b2
JK		 755{
756 struct curseg_info *curseg = CURSEG_I(sbi, type);
757 void *addr = curseg->sum_blk;
e79efe3b 758 addr += curseg->next_blkoff * sizeof(struct f2fs_summary);
351df4b2 759 memcpy(addr, sum, sizeof(struct f2fs_summary));
351df4b2
JK		 760}
761
0a8165d7 762/*
351df4b2
JK		 763 * Calculate the number of current summary pages for writing
764 */
3fa06d7b 765int npages_for_summary_flush(struct f2fs_sb_info *sbi, bool for_ra)
351df4b2 766{
351df4b2 767 int valid_sum_count = 0;
9a47938b 768 int i, sum_in_page;
351df4b2
JK		 769
770 for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) {
771 if (sbi->ckpt->alloc_type[i] == SSR)
772 valid_sum_count += sbi->blocks_per_seg;
3fa06d7b
CY		 773 else {
774 if (for_ra)
775 valid_sum_count += le16_to_cpu(
776 F2FS_CKPT(sbi)->cur_data_blkoff[i]);
777 else
778 valid_sum_count += curseg_blkoff(sbi, i);
779 }
351df4b2
JK		 780 }
781
9a47938b
FL		 782 sum_in_page = (PAGE_CACHE_SIZE - 2 * SUM_JOURNAL_SIZE -
783 SUM_FOOTER_SIZE) / SUMMARY_SIZE;
784 if (valid_sum_count <= sum_in_page)
351df4b2 785 return 1;
9a47938b
FL		 786 else if ((valid_sum_count - sum_in_page) <=
787 (PAGE_CACHE_SIZE - SUM_FOOTER_SIZE) / SUMMARY_SIZE)
351df4b2
JK		 788 return 2;
789 return 3;
790}
791
0a8165d7 792/*
351df4b2
JK		 793 * Caller should put this summary page
794 */
795struct page *get_sum_page(struct f2fs_sb_info *sbi, unsigned int segno)
796{
797 return get_meta_page(sbi, GET_SUM_BLOCK(sbi, segno));
798}
799
381722d2 800void update_meta_page(struct f2fs_sb_info *sbi, void *src, block_t blk_addr)
351df4b2
JK		 801{
802 struct page *page = grab_meta_page(sbi, blk_addr);
381722d2
CY		 803 void *dst = page_address(page);
804
805 if (src)
806 memcpy(dst, src, PAGE_CACHE_SIZE);
807 else
808 memset(dst, 0, PAGE_CACHE_SIZE);
351df4b2
JK		 809 set_page_dirty(page);
810 f2fs_put_page(page, 1);
811}
812
381722d2
CY		 813static void write_sum_page(struct f2fs_sb_info *sbi,
814 struct f2fs_summary_block *sum_blk, block_t blk_addr)
815{
816 update_meta_page(sbi, (void *)sum_blk, blk_addr);
817}
818
60374688
JK		 819static int is_next_segment_free(struct f2fs_sb_info *sbi, int type)
820{
821 struct curseg_info *curseg = CURSEG_I(sbi, type);
81fb5e87 822 unsigned int segno = curseg->segno + 1;
60374688
JK		 823 struct free_segmap_info *free_i = FREE_I(sbi);
824
7cd8558b 825 if (segno < MAIN_SEGS(sbi) && segno % sbi->segs_per_sec)
81fb5e87 826 return !test_bit(segno, free_i->free_segmap);
60374688
JK		 827 return 0;
828}
829
0a8165d7 830/*
351df4b2
JK		 831 * Find a new segment from the free segments bitmap to right order
832 * This function should be returned with success, otherwise BUG
833 */
834static void get_new_segment(struct f2fs_sb_info *sbi,
835 unsigned int *newseg, bool new_sec, int dir)
836{
837 struct free_segmap_info *free_i = FREE_I(sbi);
351df4b2 838 unsigned int segno, secno, zoneno;
7cd8558b 839 unsigned int total_zones = MAIN_SECS(sbi) / sbi->secs_per_zone;
351df4b2
JK		 840 unsigned int hint = *newseg / sbi->segs_per_sec;
841 unsigned int old_zoneno = GET_ZONENO_FROM_SEGNO(sbi, *newseg);
842 unsigned int left_start = hint;
843 bool init = true;
844 int go_left = 0;
845 int i;
846
1a118ccf 847 spin_lock(&free_i->segmap_lock);
351df4b2
JK		 848
849 if (!new_sec && ((*newseg + 1) % sbi->segs_per_sec)) {
850 segno = find_next_zero_bit(free_i->free_segmap,
7cd8558b 851 MAIN_SEGS(sbi), *newseg + 1);
33afa7fd
JK		 852 if (segno - *newseg < sbi->segs_per_sec -
853 (*newseg % sbi->segs_per_sec))
351df4b2
JK		 854 goto got_it;
855 }
856find_other_zone:
7cd8558b
JK		 857 secno = find_next_zero_bit(free_i->free_secmap, MAIN_SECS(sbi), hint);
858 if (secno >= MAIN_SECS(sbi)) {
351df4b2
JK		 859 if (dir == ALLOC_RIGHT) {
860 secno = find_next_zero_bit(free_i->free_secmap,
7cd8558b
JK		 861 MAIN_SECS(sbi), 0);
862 f2fs_bug_on(sbi, secno >= MAIN_SECS(sbi));
351df4b2
JK		 863 } else {
864 go_left = 1;
865 left_start = hint - 1;
866 }
867 }
868 if (go_left == 0)
869 goto skip_left;
870
871 while (test_bit(left_start, free_i->free_secmap)) {
872 if (left_start > 0) {
873 left_start--;
874 continue;
875 }
876 left_start = find_next_zero_bit(free_i->free_secmap,
7cd8558b
JK		 877 MAIN_SECS(sbi), 0);
878 f2fs_bug_on(sbi, left_start >= MAIN_SECS(sbi));
351df4b2
JK		 879 break;
880 }
881 secno = left_start;
882skip_left:
883 hint = secno;
884 segno = secno * sbi->segs_per_sec;
885 zoneno = secno / sbi->secs_per_zone;
886
887 /* give up on finding another zone */
888 if (!init)
889 goto got_it;
890 if (sbi->secs_per_zone == 1)
891 goto got_it;
892 if (zoneno == old_zoneno)
893 goto got_it;
894 if (dir == ALLOC_LEFT) {
895 if (!go_left && zoneno + 1 >= total_zones)
896 goto got_it;
897 if (go_left && zoneno == 0)
898 goto got_it;
899 }
900 for (i = 0; i < NR_CURSEG_TYPE; i++)
901 if (CURSEG_I(sbi, i)->zone == zoneno)
902 break;
903
904 if (i < NR_CURSEG_TYPE) {
905 /* zone is in user, try another */
906 if (go_left)
907 hint = zoneno * sbi->secs_per_zone - 1;
908 else if (zoneno + 1 >= total_zones)
909 hint = 0;
910 else
911 hint = (zoneno + 1) * sbi->secs_per_zone;
912 init = false;
913 goto find_other_zone;
914 }
915got_it:
916 /* set it as dirty segment in free segmap */
9850cf4a 917 f2fs_bug_on(sbi, test_bit(segno, free_i->free_segmap));
351df4b2
JK		 918 __set_inuse(sbi, segno);
919 *newseg = segno;
1a118ccf 920 spin_unlock(&free_i->segmap_lock);
351df4b2
JK		 921}
922
923static void reset_curseg(struct f2fs_sb_info *sbi, int type, int modified)
924{
925 struct curseg_info *curseg = CURSEG_I(sbi, type);
926 struct summary_footer *sum_footer;
927
928 curseg->segno = curseg->next_segno;
929 curseg->zone = GET_ZONENO_FROM_SEGNO(sbi, curseg->segno);
930 curseg->next_blkoff = 0;
931 curseg->next_segno = NULL_SEGNO;
932
933 sum_footer = &(curseg->sum_blk->footer);
934 memset(sum_footer, 0, sizeof(struct summary_footer));
935 if (IS_DATASEG(type))
936 SET_SUM_TYPE(sum_footer, SUM_TYPE_DATA);
937 if (IS_NODESEG(type))
938 SET_SUM_TYPE(sum_footer, SUM_TYPE_NODE);
939 __set_sit_entry_type(sbi, type, curseg->segno, modified);
940}
941
0a8165d7 942/*
351df4b2
JK		 943 * Allocate a current working segment.
944 * This function always allocates a free segment in LFS manner.
945 */
946static void new_curseg(struct f2fs_sb_info *sbi, int type, bool new_sec)
947{
948 struct curseg_info *curseg = CURSEG_I(sbi, type);
949 unsigned int segno = curseg->segno;
950 int dir = ALLOC_LEFT;
951
952 write_sum_page(sbi, curseg->sum_blk,
81fb5e87 953 GET_SUM_BLOCK(sbi, segno));
351df4b2
JK		 954 if (type == CURSEG_WARM_DATA || type == CURSEG_COLD_DATA)
955 dir = ALLOC_RIGHT;
956
957 if (test_opt(sbi, NOHEAP))
958 dir = ALLOC_RIGHT;
959
960 get_new_segment(sbi, &segno, new_sec, dir);
961 curseg->next_segno = segno;
962 reset_curseg(sbi, type, 1);
963 curseg->alloc_type = LFS;
964}
965
966static void __next_free_blkoff(struct f2fs_sb_info *sbi,
967 struct curseg_info *seg, block_t start)
968{
969 struct seg_entry *se = get_seg_entry(sbi, seg->segno);
e81c93cf 970 int entries = SIT_VBLOCK_MAP_SIZE / sizeof(unsigned long);
60a3b782 971 unsigned long *target_map = SIT_I(sbi)->tmp_map;
e81c93cf
CL		 972 unsigned long *ckpt_map = (unsigned long *)se->ckpt_valid_map;
973 unsigned long *cur_map = (unsigned long *)se->cur_valid_map;
974 int i, pos;
975
976 for (i = 0; i < entries; i++)
977 target_map[i] = ckpt_map[i] | cur_map[i];
978
979 pos = __find_rev_next_zero_bit(target_map, sbi->blocks_per_seg, start);
980
981 seg->next_blkoff = pos;
351df4b2
JK		 982}
983
0a8165d7 984/*
351df4b2
JK		 985 * If a segment is written by LFS manner, next block offset is just obtained
986 * by increasing the current block offset. However, if a segment is written by
987 * SSR manner, next block offset obtained by calling __next_free_blkoff
988 */
989static void __refresh_next_blkoff(struct f2fs_sb_info *sbi,
990 struct curseg_info *seg)
991{
992 if (seg->alloc_type == SSR)
993 __next_free_blkoff(sbi, seg, seg->next_blkoff + 1);
994 else
995 seg->next_blkoff++;
996}
997
0a8165d7 998/*
e1c42045 999 * This function always allocates a used segment(from dirty seglist) by SSR
351df4b2
JK		 1000 * manner, so it should recover the existing segment information of valid blocks
1001 */
1002static void change_curseg(struct f2fs_sb_info *sbi, int type, bool reuse)
1003{
1004 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
1005 struct curseg_info *curseg = CURSEG_I(sbi, type);
1006 unsigned int new_segno = curseg->next_segno;
1007 struct f2fs_summary_block *sum_node;
1008 struct page *sum_page;
1009
1010 write_sum_page(sbi, curseg->sum_blk,
1011 GET_SUM_BLOCK(sbi, curseg->segno));
1012 __set_test_and_inuse(sbi, new_segno);
1013
1014 mutex_lock(&dirty_i->seglist_lock);
1015 __remove_dirty_segment(sbi, new_segno, PRE);
1016 __remove_dirty_segment(sbi, new_segno, DIRTY);
1017 mutex_unlock(&dirty_i->seglist_lock);
1018
1019 reset_curseg(sbi, type, 1);
1020 curseg->alloc_type = SSR;
1021 __next_free_blkoff(sbi, curseg, 0);
1022
1023 if (reuse) {
1024 sum_page = get_sum_page(sbi, new_segno);
1025 sum_node = (struct f2fs_summary_block *)page_address(sum_page);
1026 memcpy(curseg->sum_blk, sum_node, SUM_ENTRY_SIZE);
1027 f2fs_put_page(sum_page, 1);
1028 }
1029}
1030
43727527
JK		 1031static int get_ssr_segment(struct f2fs_sb_info *sbi, int type)
1032{
1033 struct curseg_info *curseg = CURSEG_I(sbi, type);
1034 const struct victim_selection *v_ops = DIRTY_I(sbi)->v_ops;
1035
1036 if (IS_NODESEG(type) || !has_not_enough_free_secs(sbi, 0))
1037 return v_ops->get_victim(sbi,
1038 &(curseg)->next_segno, BG_GC, type, SSR);
1039
1040 /* For data segments, let's do SSR more intensively */
1041 for (; type >= CURSEG_HOT_DATA; type--)
1042 if (v_ops->get_victim(sbi, &(curseg)->next_segno,
1043 BG_GC, type, SSR))
1044 return 1;
1045 return 0;
1046}
1047
351df4b2
JK		 1048/*
1049 * flush out current segment and replace it with new segment
1050 * This function should be returned with success, otherwise BUG
1051 */
1052static void allocate_segment_by_default(struct f2fs_sb_info *sbi,
1053 int type, bool force)
1054{
1055 struct curseg_info *curseg = CURSEG_I(sbi, type);
351df4b2 1056
7b405275 1057 if (force)
351df4b2 1058 new_curseg(sbi, type, true);
7b405275 1059 else if (type == CURSEG_WARM_NODE)
351df4b2 1060 new_curseg(sbi, type, false);
60374688
JK		 1061 else if (curseg->alloc_type == LFS && is_next_segment_free(sbi, type))
1062 new_curseg(sbi, type, false);
351df4b2
JK		 1063 else if (need_SSR(sbi) && get_ssr_segment(sbi, type))
1064 change_curseg(sbi, type, true);
1065 else
1066 new_curseg(sbi, type, false);
dcdfff65
JK		 1067
1068 stat_inc_seg_type(sbi, curseg);
351df4b2
JK		 1069}
1070
38aa0889
JK		 1071static void __allocate_new_segments(struct f2fs_sb_info *sbi, int type)
1072{
1073 struct curseg_info *curseg = CURSEG_I(sbi, type);
1074 unsigned int old_segno;
1075
1076 old_segno = curseg->segno;
1077 SIT_I(sbi)->s_ops->allocate_segment(sbi, type, true);
1078 locate_dirty_segment(sbi, old_segno);
1079}
1080
351df4b2
JK		 1081void allocate_new_segments(struct f2fs_sb_info *sbi)
1082{
351df4b2
JK		 1083 int i;
1084
38aa0889
JK		 1085 for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++)
1086 __allocate_new_segments(sbi, i);
351df4b2
JK		 1087}
1088
1089static const struct segment_allocation default_salloc_ops = {
1090 .allocate_segment = allocate_segment_by_default,
1091};
1092
4b2fecc8
JK		 1093int f2fs_trim_fs(struct f2fs_sb_info *sbi, struct fstrim_range *range)
1094{
f7ef9b83
JK		 1095 __u64 start = F2FS_BYTES_TO_BLK(range->start);
1096 __u64 end = start + F2FS_BYTES_TO_BLK(range->len) - 1;
4b2fecc8
JK		 1097 unsigned int start_segno, end_segno;
1098 struct cp_control cpc;
1099
836b5a63 1100 if (start >= MAX_BLKADDR(sbi) || range->len < sbi->blocksize)
4b2fecc8
JK		 1101 return -EINVAL;
1102
9bd27ae4 1103 cpc.trimmed = 0;
7cd8558b 1104 if (end <= MAIN_BLKADDR(sbi))
4b2fecc8
JK		 1105 goto out;
1106
1107 /* start/end segment number in main_area */
7cd8558b
JK		 1108 start_segno = (start <= MAIN_BLKADDR(sbi)) ? 0 : GET_SEGNO(sbi, start);
1109 end_segno = (end >= MAX_BLKADDR(sbi)) ? MAIN_SEGS(sbi) - 1 :
1110 GET_SEGNO(sbi, end);
4b2fecc8 1111 cpc.reason = CP_DISCARD;
836b5a63 1112 cpc.trim_minlen = max_t(__u64, 1, F2FS_BYTES_TO_BLK(range->minlen));
4b2fecc8
JK		 1113
1114 /* do checkpoint to issue discard commands safely */
bba681cb
JK		 1115 for (; start_segno <= end_segno; start_segno = cpc.trim_end + 1) {
1116 cpc.trim_start = start_segno;
a66cdd98
JK		 1117
1118 if (sbi->discard_blks == 0)
1119 break;
1120 else if (sbi->discard_blks < BATCHED_TRIM_BLOCKS(sbi))
1121 cpc.trim_end = end_segno;
1122 else
1123 cpc.trim_end = min_t(unsigned int,
1124 rounddown(start_segno +
bba681cb
JK		 1125 BATCHED_TRIM_SEGMENTS(sbi),
1126 sbi->segs_per_sec) - 1, end_segno);
1127
1128 mutex_lock(&sbi->gc_mutex);
1129 write_checkpoint(sbi, &cpc);
1130 mutex_unlock(&sbi->gc_mutex);
1131 }
4b2fecc8 1132out:
f7ef9b83 1133 range->len = F2FS_BLK_TO_BYTES(cpc.trimmed);
4b2fecc8
JK		 1134 return 0;
1135}
1136
351df4b2
JK		 1137static bool __has_curseg_space(struct f2fs_sb_info *sbi, int type)
1138{
1139 struct curseg_info *curseg = CURSEG_I(sbi, type);
1140 if (curseg->next_blkoff < sbi->blocks_per_seg)
1141 return true;
1142 return false;
1143}
1144
1145static int __get_segment_type_2(struct page *page, enum page_type p_type)
1146{
1147 if (p_type == DATA)
1148 return CURSEG_HOT_DATA;
1149 else
1150 return CURSEG_HOT_NODE;
1151}
1152
1153static int __get_segment_type_4(struct page *page, enum page_type p_type)
1154{
1155 if (p_type == DATA) {
1156 struct inode *inode = page->mapping->host;
1157
1158 if (S_ISDIR(inode->i_mode))
1159 return CURSEG_HOT_DATA;
1160 else
1161 return CURSEG_COLD_DATA;
1162 } else {
a344b9fd
JK		 1163 if (IS_DNODE(page) && is_cold_node(page))
1164 return CURSEG_WARM_NODE;
351df4b2
JK		 1165 else
1166 return CURSEG_COLD_NODE;
1167 }
1168}
1169
1170static int __get_segment_type_6(struct page *page, enum page_type p_type)
1171{
1172 if (p_type == DATA) {
1173 struct inode *inode = page->mapping->host;
1174
1175 if (S_ISDIR(inode->i_mode))
1176 return CURSEG_HOT_DATA;
354a3399 1177 else if (is_cold_data(page) || file_is_cold(inode))
351df4b2
JK		 1178 return CURSEG_COLD_DATA;
1179 else
1180 return CURSEG_WARM_DATA;
1181 } else {
1182 if (IS_DNODE(page))
1183 return is_cold_node(page) ? CURSEG_WARM_NODE :
1184 CURSEG_HOT_NODE;
1185 else
1186 return CURSEG_COLD_NODE;
1187 }
1188}
1189
1190static int __get_segment_type(struct page *page, enum page_type p_type)
1191{
4081363f 1192 switch (F2FS_P_SB(page)->active_logs) {
351df4b2
JK		 1193 case 2:
1194 return __get_segment_type_2(page, p_type);
1195 case 4:
1196 return __get_segment_type_4(page, p_type);
351df4b2 1197 }
12a67146 1198 /* NR_CURSEG_TYPE(6) logs by default */
9850cf4a
JK		 1199 f2fs_bug_on(F2FS_P_SB(page),
1200 F2FS_P_SB(page)->active_logs != NR_CURSEG_TYPE);
12a67146 1201 return __get_segment_type_6(page, p_type);
351df4b2
JK		 1202}
1203
bfad7c2d
JK		 1204void allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
1205 block_t old_blkaddr, block_t *new_blkaddr,
1206 struct f2fs_summary *sum, int type)
351df4b2
JK		 1207{
1208 struct sit_info *sit_i = SIT_I(sbi);
1209 struct curseg_info *curseg;
38aa0889
JK		 1210 bool direct_io = (type == CURSEG_DIRECT_IO);
1211
1212 type = direct_io ? CURSEG_WARM_DATA : type;
351df4b2 1213
351df4b2
JK		 1214 curseg = CURSEG_I(sbi, type);
1215
1216 mutex_lock(&curseg->curseg_mutex);
21cb1d99 1217 mutex_lock(&sit_i->sentry_lock);
351df4b2 1218
38aa0889
JK		 1219 /* direct_io'ed data is aligned to the segment for better performance */
1220 if (direct_io && curseg->next_blkoff)
1221 __allocate_new_segments(sbi, type);
1222
351df4b2 1223 *new_blkaddr = NEXT_FREE_BLKADDR(sbi, curseg);
351df4b2
JK		 1224
1225 /*
1226 * __add_sum_entry should be resided under the curseg_mutex
1227 * because, this function updates a summary entry in the
1228 * current summary block.
1229 */
e79efe3b 1230 __add_sum_entry(sbi, type, sum);
351df4b2 1231
351df4b2 1232 __refresh_next_blkoff(sbi, curseg);
dcdfff65
JK		 1233
1234 stat_inc_block_count(sbi, curseg);
351df4b2 1235
5e443818
JK		 1236 if (!__has_curseg_space(sbi, type))
1237 sit_i->s_ops->allocate_segment(sbi, type, false);
351df4b2
JK		 1238 /*
1239 * SIT information should be updated before segment allocation,
1240 * since SSR needs latest valid block information.
1241 */
1242 refresh_sit_entry(sbi, old_blkaddr, *new_blkaddr);
5e443818 1243
351df4b2
JK		 1244 mutex_unlock(&sit_i->sentry_lock);
1245
bfad7c2d 1246 if (page && IS_NODESEG(type))
351df4b2
JK		 1247 fill_node_footer_blkaddr(page, NEXT_FREE_BLKADDR(sbi, curseg));
1248
bfad7c2d
JK		 1249 mutex_unlock(&curseg->curseg_mutex);
1250}
1251
05ca3632 1252static void do_write_page(struct f2fs_summary *sum, struct f2fs_io_info *fio)
bfad7c2d 1253{
05ca3632 1254 int type = __get_segment_type(fio->page, fio->type);
bfad7c2d 1255
05ca3632
JK		 1256 allocate_data_block(fio->sbi, fio->page, fio->blk_addr,
1257 &fio->blk_addr, sum, type);
bfad7c2d 1258
351df4b2 1259 /* writeout dirty page into bdev */
05ca3632 1260 f2fs_submit_page_mbio(fio);
351df4b2
JK		 1261}
1262
577e3495 1263void write_meta_page(struct f2fs_sb_info *sbi, struct page *page)
351df4b2 1264{
458e6197 1265 struct f2fs_io_info fio = {
05ca3632 1266 .sbi = sbi,
458e6197 1267 .type = META,
cf04e8eb
JK		 1268 .rw = WRITE_SYNC | REQ_META | REQ_PRIO,
1269 .blk_addr = page->index,
05ca3632 1270 .page = page,
4375a336 1271 .encrypted_page = NULL,
458e6197
JK		 1272 };
1273
351df4b2 1274 set_page_writeback(page);
05ca3632 1275 f2fs_submit_page_mbio(&fio);
351df4b2
JK		 1276}
1277
05ca3632 1278void write_node_page(unsigned int nid, struct f2fs_io_info *fio)
351df4b2
JK		 1279{
1280 struct f2fs_summary sum;
05ca3632 1281
351df4b2 1282 set_summary(&sum, nid, 0, 0);
05ca3632 1283 do_write_page(&sum, fio);
351df4b2
JK		 1284}
1285
05ca3632 1286void write_data_page(struct dnode_of_data *dn, struct f2fs_io_info *fio)
351df4b2 1287{
05ca3632 1288 struct f2fs_sb_info *sbi = fio->sbi;
351df4b2
JK		 1289 struct f2fs_summary sum;
1290 struct node_info ni;
1291
9850cf4a 1292 f2fs_bug_on(sbi, dn->data_blkaddr == NULL_ADDR);
351df4b2
JK		 1293 get_node_info(sbi, dn->nid, &ni);
1294 set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version);
05ca3632 1295 do_write_page(&sum, fio);
e1509cf2 1296 dn->data_blkaddr = fio->blk_addr;
351df4b2
JK		 1297}
1298
05ca3632 1299void rewrite_data_page(struct f2fs_io_info *fio)
351df4b2 1300{
05ca3632
JK		 1301 stat_inc_inplace_blocks(fio->sbi);
1302 f2fs_submit_page_mbio(fio);
351df4b2
JK		 1303}
1304
528e3459
CY		 1305static void __f2fs_replace_block(struct f2fs_sb_info *sbi,
1306 struct f2fs_summary *sum,
19f106bc
CY		 1307 block_t old_blkaddr, block_t new_blkaddr,
1308 bool recover_curseg)
351df4b2
JK		 1309{
1310 struct sit_info *sit_i = SIT_I(sbi);
1311 struct curseg_info *curseg;
1312 unsigned int segno, old_cursegno;
1313 struct seg_entry *se;
1314 int type;
19f106bc 1315 unsigned short old_blkoff;
351df4b2
JK		 1316
1317 segno = GET_SEGNO(sbi, new_blkaddr);
1318 se = get_seg_entry(sbi, segno);
1319 type = se->type;
1320
19f106bc
CY		 1321 if (!recover_curseg) {
1322 /* for recovery flow */
1323 if (se->valid_blocks == 0 && !IS_CURSEG(sbi, segno)) {
1324 if (old_blkaddr == NULL_ADDR)
1325 type = CURSEG_COLD_DATA;
1326 else
1327 type = CURSEG_WARM_DATA;
1328 }
1329 } else {
1330 if (!IS_CURSEG(sbi, segno))
351df4b2
JK		 1331 type = CURSEG_WARM_DATA;
1332 }
19f106bc 1333
351df4b2
JK		 1334 curseg = CURSEG_I(sbi, type);
1335
1336 mutex_lock(&curseg->curseg_mutex);
1337 mutex_lock(&sit_i->sentry_lock);
1338
1339 old_cursegno = curseg->segno;
19f106bc 1340 old_blkoff = curseg->next_blkoff;
351df4b2
JK		 1341
1342 /* change the current segment */
1343 if (segno != curseg->segno) {
1344 curseg->next_segno = segno;
1345 change_curseg(sbi, type, true);
1346 }
1347
491c0854 1348 curseg->next_blkoff = GET_BLKOFF_FROM_SEG0(sbi, new_blkaddr);
e79efe3b 1349 __add_sum_entry(sbi, type, sum);
351df4b2
JK		 1350
1351 refresh_sit_entry(sbi, old_blkaddr, new_blkaddr);
351df4b2 1352 locate_dirty_segment(sbi, old_cursegno);
351df4b2 1353
19f106bc
CY		 1354 if (recover_curseg) {
1355 if (old_cursegno != curseg->segno) {
1356 curseg->next_segno = old_cursegno;
1357 change_curseg(sbi, type, true);
1358 }
1359 curseg->next_blkoff = old_blkoff;
1360 }
1361
351df4b2
JK		 1362 mutex_unlock(&sit_i->sentry_lock);
1363 mutex_unlock(&curseg->curseg_mutex);
1364}
1365
528e3459
CY		 1366void f2fs_replace_block(struct f2fs_sb_info *sbi, struct dnode_of_data *dn,
1367 block_t old_addr, block_t new_addr,
1368 unsigned char version, bool recover_curseg)
1369{
1370 struct f2fs_summary sum;
1371
1372 set_summary(&sum, dn->nid, dn->ofs_in_node, version);
1373
1374 __f2fs_replace_block(sbi, &sum, old_addr, new_addr, recover_curseg);
1375
1376 dn->data_blkaddr = new_addr;
1377 set_data_blkaddr(dn);
1378 f2fs_update_extent_cache(dn);
1379}
1380
df0f8dc0
CY		 1381static inline bool is_merged_page(struct f2fs_sb_info *sbi,
1382 struct page *page, enum page_type type)
1383{
1384 enum page_type btype = PAGE_TYPE_OF_BIO(type);
1385 struct f2fs_bio_info *io = &sbi->write_io[btype];
df0f8dc0 1386 struct bio_vec *bvec;
4375a336 1387 struct page *target;
df0f8dc0
CY		 1388 int i;
1389
1390 down_read(&io->io_rwsem);
4375a336
JK		 1391 if (!io->bio) {
1392 up_read(&io->io_rwsem);
1393 return false;
1394 }
df0f8dc0 1395
ce23447f 1396 bio_for_each_segment_all(bvec, io->bio, i) {
4375a336
JK		 1397
1398 if (bvec->bv_page->mapping) {
1399 target = bvec->bv_page;
1400 } else {
1401 struct f2fs_crypto_ctx *ctx;
1402
1403 /* encrypted page */
1404 ctx = (struct f2fs_crypto_ctx *)page_private(
1405 bvec->bv_page);
ca40b030 1406 target = ctx->w.control_page;
4375a336
JK		 1407 }
1408
1409 if (page == target) {
df0f8dc0
CY		 1410 up_read(&io->io_rwsem);
1411 return true;
1412 }
1413 }
1414
df0f8dc0
CY		 1415 up_read(&io->io_rwsem);
1416 return false;
1417}
1418
93dfe2ac 1419void f2fs_wait_on_page_writeback(struct page *page,
5514f0aa 1420 enum page_type type)
93dfe2ac 1421{
93dfe2ac 1422 if (PageWriteback(page)) {
4081363f
JK		 1423 struct f2fs_sb_info *sbi = F2FS_P_SB(page);
1424
df0f8dc0
CY		 1425 if (is_merged_page(sbi, page, type))
1426 f2fs_submit_merged_bio(sbi, type, WRITE);
93dfe2ac
JK		 1427 wait_on_page_writeback(page);
1428 }
1429}
1430
351df4b2
JK		 1431static int read_compacted_summaries(struct f2fs_sb_info *sbi)
1432{
1433 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1434 struct curseg_info *seg_i;
1435 unsigned char *kaddr;
1436 struct page *page;
1437 block_t start;
1438 int i, j, offset;
1439
1440 start = start_sum_block(sbi);
1441
1442 page = get_meta_page(sbi, start++);
1443 kaddr = (unsigned char *)page_address(page);
1444
1445 /* Step 1: restore nat cache */
1446 seg_i = CURSEG_I(sbi, CURSEG_HOT_DATA);
1447 memcpy(&seg_i->sum_blk->n_nats, kaddr, SUM_JOURNAL_SIZE);
1448
1449 /* Step 2: restore sit cache */
1450 seg_i = CURSEG_I(sbi, CURSEG_COLD_DATA);
1451 memcpy(&seg_i->sum_blk->n_sits, kaddr + SUM_JOURNAL_SIZE,
1452 SUM_JOURNAL_SIZE);
1453 offset = 2 * SUM_JOURNAL_SIZE;
1454
1455 /* Step 3: restore summary entries */
1456 for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) {
1457 unsigned short blk_off;
1458 unsigned int segno;
1459
1460 seg_i = CURSEG_I(sbi, i);
1461 segno = le32_to_cpu(ckpt->cur_data_segno[i]);
1462 blk_off = le16_to_cpu(ckpt->cur_data_blkoff[i]);
1463 seg_i->next_segno = segno;
1464 reset_curseg(sbi, i, 0);
1465 seg_i->alloc_type = ckpt->alloc_type[i];
1466 seg_i->next_blkoff = blk_off;
1467
1468 if (seg_i->alloc_type == SSR)
1469 blk_off = sbi->blocks_per_seg;
1470
1471 for (j = 0; j < blk_off; j++) {
1472 struct f2fs_summary *s;
1473 s = (struct f2fs_summary *)(kaddr + offset);
1474 seg_i->sum_blk->entries[j] = *s;
1475 offset += SUMMARY_SIZE;
1476 if (offset + SUMMARY_SIZE <= PAGE_CACHE_SIZE -
1477 SUM_FOOTER_SIZE)
1478 continue;
1479
1480 f2fs_put_page(page, 1);
1481 page = NULL;
1482
1483 page = get_meta_page(sbi, start++);
1484 kaddr = (unsigned char *)page_address(page);
1485 offset = 0;
1486 }
1487 }
1488 f2fs_put_page(page, 1);
1489 return 0;
1490}
1491
1492static int read_normal_summaries(struct f2fs_sb_info *sbi, int type)
1493{
1494 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1495 struct f2fs_summary_block *sum;
1496 struct curseg_info *curseg;
1497 struct page *new;
1498 unsigned short blk_off;
1499 unsigned int segno = 0;
1500 block_t blk_addr = 0;
1501
1502 /* get segment number and block addr */
1503 if (IS_DATASEG(type)) {
1504 segno = le32_to_cpu(ckpt->cur_data_segno[type]);
1505 blk_off = le16_to_cpu(ckpt->cur_data_blkoff[type -
1506 CURSEG_HOT_DATA]);
119ee914 1507 if (__exist_node_summaries(sbi))
351df4b2
JK		 1508 blk_addr = sum_blk_addr(sbi, NR_CURSEG_TYPE, type);
1509 else
1510 blk_addr = sum_blk_addr(sbi, NR_CURSEG_DATA_TYPE, type);
1511 } else {
1512 segno = le32_to_cpu(ckpt->cur_node_segno[type -
1513 CURSEG_HOT_NODE]);
1514 blk_off = le16_to_cpu(ckpt->cur_node_blkoff[type -
1515 CURSEG_HOT_NODE]);
119ee914 1516 if (__exist_node_summaries(sbi))
351df4b2
JK		 1517 blk_addr = sum_blk_addr(sbi, NR_CURSEG_NODE_TYPE,
1518 type - CURSEG_HOT_NODE);
1519 else
1520 blk_addr = GET_SUM_BLOCK(sbi, segno);
1521 }
1522
1523 new = get_meta_page(sbi, blk_addr);
1524 sum = (struct f2fs_summary_block *)page_address(new);
1525
1526 if (IS_NODESEG(type)) {
119ee914 1527 if (__exist_node_summaries(sbi)) {
351df4b2
JK		 1528 struct f2fs_summary *ns = &sum->entries[0];
1529 int i;
1530 for (i = 0; i < sbi->blocks_per_seg; i++, ns++) {
1531 ns->version = 0;
1532 ns->ofs_in_node = 0;
1533 }
1534 } else {
d653788a
GZ		 1535 int err;
1536
1537 err = restore_node_summary(sbi, segno, sum);
1538 if (err) {
351df4b2 1539 f2fs_put_page(new, 1);
d653788a 1540 return err;
351df4b2
JK		 1541 }
1542 }
1543 }
1544
1545 /* set uncompleted segment to curseg */
1546 curseg = CURSEG_I(sbi, type);
1547 mutex_lock(&curseg->curseg_mutex);
1548 memcpy(curseg->sum_blk, sum, PAGE_CACHE_SIZE);
1549 curseg->next_segno = segno;
1550 reset_curseg(sbi, type, 0);
1551 curseg->alloc_type = ckpt->alloc_type[type];
1552 curseg->next_blkoff = blk_off;
1553 mutex_unlock(&curseg->curseg_mutex);
1554 f2fs_put_page(new, 1);
1555 return 0;
1556}
1557
1558static int restore_curseg_summaries(struct f2fs_sb_info *sbi)
1559{
1560 int type = CURSEG_HOT_DATA;
e4fc5fbf 1561 int err;
351df4b2 1562
25ca923b 1563 if (is_set_ckpt_flags(F2FS_CKPT(sbi), CP_COMPACT_SUM_FLAG)) {
3fa06d7b
CY		 1564 int npages = npages_for_summary_flush(sbi, true);
1565
1566 if (npages >= 2)
1567 ra_meta_pages(sbi, start_sum_block(sbi), npages,
1568 META_CP);
1569
351df4b2
JK		 1570 /* restore for compacted data summary */
1571 if (read_compacted_summaries(sbi))
1572 return -EINVAL;
1573 type = CURSEG_HOT_NODE;
1574 }
1575
119ee914 1576 if (__exist_node_summaries(sbi))
3fa06d7b
CY		 1577 ra_meta_pages(sbi, sum_blk_addr(sbi, NR_CURSEG_TYPE, type),
1578 NR_CURSEG_TYPE - type, META_CP);
1579
e4fc5fbf
CY		 1580 for (; type <= CURSEG_COLD_NODE; type++) {
1581 err = read_normal_summaries(sbi, type);
1582 if (err)
1583 return err;
1584 }
1585
351df4b2
JK		 1586 return 0;
1587}
1588
1589static void write_compacted_summaries(struct f2fs_sb_info *sbi, block_t blkaddr)
1590{
1591 struct page *page;
1592 unsigned char *kaddr;
1593 struct f2fs_summary *summary;
1594 struct curseg_info *seg_i;
1595 int written_size = 0;
1596 int i, j;
1597
1598 page = grab_meta_page(sbi, blkaddr++);
1599 kaddr = (unsigned char *)page_address(page);
1600
1601 /* Step 1: write nat cache */
1602 seg_i = CURSEG_I(sbi, CURSEG_HOT_DATA);
1603 memcpy(kaddr, &seg_i->sum_blk->n_nats, SUM_JOURNAL_SIZE);
1604 written_size += SUM_JOURNAL_SIZE;
1605
1606 /* Step 2: write sit cache */
1607 seg_i = CURSEG_I(sbi, CURSEG_COLD_DATA);
1608 memcpy(kaddr + written_size, &seg_i->sum_blk->n_sits,
1609 SUM_JOURNAL_SIZE);
1610 written_size += SUM_JOURNAL_SIZE;
1611
351df4b2
JK		 1612 /* Step 3: write summary entries */
1613 for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) {
1614 unsigned short blkoff;
1615 seg_i = CURSEG_I(sbi, i);
1616 if (sbi->ckpt->alloc_type[i] == SSR)
1617 blkoff = sbi->blocks_per_seg;
1618 else
1619 blkoff = curseg_blkoff(sbi, i);
1620
1621 for (j = 0; j < blkoff; j++) {
1622 if (!page) {
1623 page = grab_meta_page(sbi, blkaddr++);
1624 kaddr = (unsigned char *)page_address(page);
1625 written_size = 0;
1626 }
1627 summary = (struct f2fs_summary *)(kaddr + written_size);
1628 *summary = seg_i->sum_blk->entries[j];
1629 written_size += SUMMARY_SIZE;
351df4b2
JK		 1630
1631 if (written_size + SUMMARY_SIZE <= PAGE_CACHE_SIZE -
1632 SUM_FOOTER_SIZE)
1633 continue;
1634
e8d61a74 1635 set_page_dirty(page);
351df4b2
JK		 1636 f2fs_put_page(page, 1);
1637 page = NULL;
1638 }
1639 }
e8d61a74
CY		 1640 if (page) {
1641 set_page_dirty(page);
351df4b2 1642 f2fs_put_page(page, 1);
e8d61a74 1643 }
351df4b2
JK		 1644}
1645
1646static void write_normal_summaries(struct f2fs_sb_info *sbi,
1647 block_t blkaddr, int type)
1648{
1649 int i, end;
1650 if (IS_DATASEG(type))
1651 end = type + NR_CURSEG_DATA_TYPE;
1652 else
1653 end = type + NR_CURSEG_NODE_TYPE;
1654
1655 for (i = type; i < end; i++) {
1656 struct curseg_info *sum = CURSEG_I(sbi, i);
1657 mutex_lock(&sum->curseg_mutex);
1658 write_sum_page(sbi, sum->sum_blk, blkaddr + (i - type));
1659 mutex_unlock(&sum->curseg_mutex);
1660 }
1661}
1662
1663void write_data_summaries(struct f2fs_sb_info *sbi, block_t start_blk)
1664{
25ca923b 1665 if (is_set_ckpt_flags(F2FS_CKPT(sbi), CP_COMPACT_SUM_FLAG))
351df4b2
JK		 1666 write_compacted_summaries(sbi, start_blk);
1667 else
1668 write_normal_summaries(sbi, start_blk, CURSEG_HOT_DATA);
1669}
1670
1671void write_node_summaries(struct f2fs_sb_info *sbi, block_t start_blk)
1672{
119ee914 1673 write_normal_summaries(sbi, start_blk, CURSEG_HOT_NODE);
351df4b2
JK		 1674}
1675
1676int lookup_journal_in_cursum(struct f2fs_summary_block *sum, int type,
1677 unsigned int val, int alloc)
1678{
1679 int i;
1680
1681 if (type == NAT_JOURNAL) {
1682 for (i = 0; i < nats_in_cursum(sum); i++) {
1683 if (le32_to_cpu(nid_in_journal(sum, i)) == val)
1684 return i;
1685 }
1686 if (alloc && nats_in_cursum(sum) < NAT_JOURNAL_ENTRIES)
1687 return update_nats_in_cursum(sum, 1);
1688 } else if (type == SIT_JOURNAL) {
1689 for (i = 0; i < sits_in_cursum(sum); i++)
1690 if (le32_to_cpu(segno_in_journal(sum, i)) == val)
1691 return i;
1692 if (alloc && sits_in_cursum(sum) < SIT_JOURNAL_ENTRIES)
1693 return update_sits_in_cursum(sum, 1);
1694 }
1695 return -1;
1696}
1697
1698static struct page *get_current_sit_page(struct f2fs_sb_info *sbi,
1699 unsigned int segno)
1700{
2cc22186 1701 return get_meta_page(sbi, current_sit_addr(sbi, segno));
351df4b2
JK		 1702}
1703
1704static struct page *get_next_sit_page(struct f2fs_sb_info *sbi,
1705 unsigned int start)
1706{
1707 struct sit_info *sit_i = SIT_I(sbi);
1708 struct page *src_page, *dst_page;
1709 pgoff_t src_off, dst_off;
1710 void *src_addr, *dst_addr;
1711
1712 src_off = current_sit_addr(sbi, start);
1713 dst_off = next_sit_addr(sbi, src_off);
1714
1715 /* get current sit block page without lock */
1716 src_page = get_meta_page(sbi, src_off);
1717 dst_page = grab_meta_page(sbi, dst_off);
9850cf4a 1718 f2fs_bug_on(sbi, PageDirty(src_page));
351df4b2
JK		 1719
1720 src_addr = page_address(src_page);
1721 dst_addr = page_address(dst_page);
1722 memcpy(dst_addr, src_addr, PAGE_CACHE_SIZE);
1723
1724 set_page_dirty(dst_page);
1725 f2fs_put_page(src_page, 1);
1726
1727 set_to_next_sit(sit_i, start);
1728
1729 return dst_page;
1730}
1731
184a5cd2
CY		 1732static struct sit_entry_set *grab_sit_entry_set(void)
1733{
1734 struct sit_entry_set *ses =
1735 f2fs_kmem_cache_alloc(sit_entry_set_slab, GFP_ATOMIC);
1736
1737 ses->entry_cnt = 0;
1738 INIT_LIST_HEAD(&ses->set_list);
1739 return ses;
1740}
1741
1742static void release_sit_entry_set(struct sit_entry_set *ses)
1743{
1744 list_del(&ses->set_list);
1745 kmem_cache_free(sit_entry_set_slab, ses);
1746}
1747
1748static void adjust_sit_entry_set(struct sit_entry_set *ses,
1749 struct list_head *head)
1750{
1751 struct sit_entry_set *next = ses;
1752
1753 if (list_is_last(&ses->set_list, head))
1754 return;
1755
1756 list_for_each_entry_continue(next, head, set_list)
1757 if (ses->entry_cnt <= next->entry_cnt)
1758 break;
1759
1760 list_move_tail(&ses->set_list, &next->set_list);
1761}
1762
1763static void add_sit_entry(unsigned int segno, struct list_head *head)
1764{
1765 struct sit_entry_set *ses;
1766 unsigned int start_segno = START_SEGNO(segno);
1767
1768 list_for_each_entry(ses, head, set_list) {
1769 if (ses->start_segno == start_segno) {
1770 ses->entry_cnt++;
1771 adjust_sit_entry_set(ses, head);
1772 return;
1773 }
1774 }
1775
1776 ses = grab_sit_entry_set();
1777
1778 ses->start_segno = start_segno;
1779 ses->entry_cnt++;
1780 list_add(&ses->set_list, head);
1781}
1782
1783static void add_sits_in_set(struct f2fs_sb_info *sbi)
1784{
1785 struct f2fs_sm_info *sm_info = SM_I(sbi);
1786 struct list_head *set_list = &sm_info->sit_entry_set;
1787 unsigned long *bitmap = SIT_I(sbi)->dirty_sentries_bitmap;
184a5cd2
CY		 1788 unsigned int segno;
1789
7cd8558b 1790 for_each_set_bit(segno, bitmap, MAIN_SEGS(sbi))
184a5cd2
CY		 1791 add_sit_entry(segno, set_list);
1792}
1793
1794static void remove_sits_in_journal(struct f2fs_sb_info *sbi)
351df4b2
JK		 1795{
1796 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA);
1797 struct f2fs_summary_block *sum = curseg->sum_blk;
1798 int i;
1799
184a5cd2
CY		 1800 for (i = sits_in_cursum(sum) - 1; i >= 0; i--) {
1801 unsigned int segno;
1802 bool dirtied;
1803
1804 segno = le32_to_cpu(segno_in_journal(sum, i));
1805 dirtied = __mark_sit_entry_dirty(sbi, segno);
1806
1807 if (!dirtied)
1808 add_sit_entry(segno, &SM_I(sbi)->sit_entry_set);
351df4b2 1809 }
184a5cd2 1810 update_sits_in_cursum(sum, -sits_in_cursum(sum));
351df4b2
JK		 1811}
1812
0a8165d7 1813/*
351df4b2
JK		 1814 * CP calls this function, which flushes SIT entries including sit_journal,
1815 * and moves prefree segs to free segs.
1816 */
4b2fecc8 1817void flush_sit_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc)
351df4b2
JK		 1818{
1819 struct sit_info *sit_i = SIT_I(sbi);
1820 unsigned long *bitmap = sit_i->dirty_sentries_bitmap;
1821 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA);
1822 struct f2fs_summary_block *sum = curseg->sum_blk;
184a5cd2
CY		 1823 struct sit_entry_set *ses, *tmp;
1824 struct list_head *head = &SM_I(sbi)->sit_entry_set;
184a5cd2 1825 bool to_journal = true;
4b2fecc8 1826 struct seg_entry *se;
351df4b2
JK		 1827
1828 mutex_lock(&curseg->curseg_mutex);
1829 mutex_lock(&sit_i->sentry_lock);
1830
2b11a74b
WL		 1831 if (!sit_i->dirty_sentries)
1832 goto out;
1833
351df4b2 1834 /*
184a5cd2
CY		 1835 * add and account sit entries of dirty bitmap in sit entry
1836 * set temporarily
351df4b2 1837 */
184a5cd2 1838 add_sits_in_set(sbi);
351df4b2 1839
184a5cd2
CY		 1840 /*
1841 * if there are no enough space in journal to store dirty sit
1842 * entries, remove all entries from journal and add and account
1843 * them in sit entry set.
1844 */
1845 if (!__has_cursum_space(sum, sit_i->dirty_sentries, SIT_JOURNAL))
1846 remove_sits_in_journal(sbi);
b2955550 1847
184a5cd2
CY		 1848 /*
1849 * there are two steps to flush sit entries:
1850 * #1, flush sit entries to journal in current cold data summary block.
1851 * #2, flush sit entries to sit page.
1852 */
1853 list_for_each_entry_safe(ses, tmp, head, set_list) {
4a257ed6 1854 struct page *page = NULL;
184a5cd2
CY		 1855 struct f2fs_sit_block *raw_sit = NULL;
1856 unsigned int start_segno = ses->start_segno;
1857 unsigned int end = min(start_segno + SIT_ENTRY_PER_BLOCK,
7cd8558b 1858 (unsigned long)MAIN_SEGS(sbi));
184a5cd2
CY		 1859 unsigned int segno = start_segno;
1860
1861 if (to_journal &&
1862 !__has_cursum_space(sum, ses->entry_cnt, SIT_JOURNAL))
1863 to_journal = false;
1864
1865 if (!to_journal) {
1866 page = get_next_sit_page(sbi, start_segno);
1867 raw_sit = page_address(page);
351df4b2 1868 }
351df4b2 1869
184a5cd2
CY		 1870 /* flush dirty sit entries in region of current sit set */
1871 for_each_set_bit_from(segno, bitmap, end) {
1872 int offset, sit_offset;
4b2fecc8
JK		 1873
1874 se = get_seg_entry(sbi, segno);
184a5cd2
CY		 1875
1876 /* add discard candidates */
d7bc2484 1877 if (cpc->reason != CP_DISCARD) {
4b2fecc8
JK		 1878 cpc->trim_start = segno;
1879 add_discard_addrs(sbi, cpc);
1880 }
184a5cd2
CY		 1881
1882 if (to_journal) {
1883 offset = lookup_journal_in_cursum(sum,
1884 SIT_JOURNAL, segno, 1);
1885 f2fs_bug_on(sbi, offset < 0);
1886 segno_in_journal(sum, offset) =
1887 cpu_to_le32(segno);
1888 seg_info_to_raw_sit(se,
1889 &sit_in_journal(sum, offset));
1890 } else {
1891 sit_offset = SIT_ENTRY_OFFSET(sit_i, segno);
1892 seg_info_to_raw_sit(se,
1893 &raw_sit->entries[sit_offset]);
1894 }
351df4b2 1895
184a5cd2
CY		 1896 __clear_bit(segno, bitmap);
1897 sit_i->dirty_sentries--;
1898 ses->entry_cnt--;
351df4b2
JK		 1899 }
1900
184a5cd2
CY		 1901 if (!to_journal)
1902 f2fs_put_page(page, 1);
1903
1904 f2fs_bug_on(sbi, ses->entry_cnt);
1905 release_sit_entry_set(ses);
351df4b2 1906 }
184a5cd2
CY		 1907
1908 f2fs_bug_on(sbi, !list_empty(head));
1909 f2fs_bug_on(sbi, sit_i->dirty_sentries);
184a5cd2 1910out:
4b2fecc8
JK		 1911 if (cpc->reason == CP_DISCARD) {
1912 for (; cpc->trim_start <= cpc->trim_end; cpc->trim_start++)
1913 add_discard_addrs(sbi, cpc);
1914 }
351df4b2
JK		 1915 mutex_unlock(&sit_i->sentry_lock);
1916 mutex_unlock(&curseg->curseg_mutex);
1917
351df4b2
JK		 1918 set_prefree_as_free_segments(sbi);
1919}
1920
1921static int build_sit_info(struct f2fs_sb_info *sbi)
1922{
1923 struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
1924 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1925 struct sit_info *sit_i;
1926 unsigned int sit_segs, start;
1927 char *src_bitmap, *dst_bitmap;
1928 unsigned int bitmap_size;
1929
1930 /* allocate memory for SIT information */
1931 sit_i = kzalloc(sizeof(struct sit_info), GFP_KERNEL);
1932 if (!sit_i)
1933 return -ENOMEM;
1934
1935 SM_I(sbi)->sit_info = sit_i;
1936
7cd8558b 1937 sit_i->sentries = vzalloc(MAIN_SEGS(sbi) * sizeof(struct seg_entry));
351df4b2
JK		 1938 if (!sit_i->sentries)
1939 return -ENOMEM;
1940
7cd8558b 1941 bitmap_size = f2fs_bitmap_size(MAIN_SEGS(sbi));
351df4b2
JK		 1942 sit_i->dirty_sentries_bitmap = kzalloc(bitmap_size, GFP_KERNEL);
1943 if (!sit_i->dirty_sentries_bitmap)
1944 return -ENOMEM;
1945
7cd8558b 1946 for (start = 0; start < MAIN_SEGS(sbi); start++) {
351df4b2
JK		 1947 sit_i->sentries[start].cur_valid_map
1948 = kzalloc(SIT_VBLOCK_MAP_SIZE, GFP_KERNEL);
1949 sit_i->sentries[start].ckpt_valid_map
1950 = kzalloc(SIT_VBLOCK_MAP_SIZE, GFP_KERNEL);
a66cdd98
JK		 1951 sit_i->sentries[start].discard_map
1952 = kzalloc(SIT_VBLOCK_MAP_SIZE, GFP_KERNEL);
1953 if (!sit_i->sentries[start].cur_valid_map ||
1954 !sit_i->sentries[start].ckpt_valid_map ||
1955 !sit_i->sentries[start].discard_map)
351df4b2
JK		 1956 return -ENOMEM;
1957 }
1958
60a3b782
JK		 1959 sit_i->tmp_map = kzalloc(SIT_VBLOCK_MAP_SIZE, GFP_KERNEL);
1960 if (!sit_i->tmp_map)
1961 return -ENOMEM;
1962
351df4b2 1963 if (sbi->segs_per_sec > 1) {
7cd8558b 1964 sit_i->sec_entries = vzalloc(MAIN_SECS(sbi) *
351df4b2
JK		 1965 sizeof(struct sec_entry));
1966 if (!sit_i->sec_entries)
1967 return -ENOMEM;
1968 }
1969
1970 /* get information related with SIT */
1971 sit_segs = le32_to_cpu(raw_super->segment_count_sit) >> 1;
1972
1973 /* setup SIT bitmap from ckeckpoint pack */
1974 bitmap_size = __bitmap_size(sbi, SIT_BITMAP);
1975 src_bitmap = __bitmap_ptr(sbi, SIT_BITMAP);
1976
79b5793b 1977 dst_bitmap = kmemdup(src_bitmap, bitmap_size, GFP_KERNEL);
351df4b2
JK		 1978 if (!dst_bitmap)
1979 return -ENOMEM;
351df4b2
JK		 1980
1981 /* init SIT information */
1982 sit_i->s_ops = &default_salloc_ops;
1983
1984 sit_i->sit_base_addr = le32_to_cpu(raw_super->sit_blkaddr);
1985 sit_i->sit_blocks = sit_segs << sbi->log_blocks_per_seg;
1986 sit_i->written_valid_blocks = le64_to_cpu(ckpt->valid_block_count);
1987 sit_i->sit_bitmap = dst_bitmap;
1988 sit_i->bitmap_size = bitmap_size;
1989 sit_i->dirty_sentries = 0;
1990 sit_i->sents_per_block = SIT_ENTRY_PER_BLOCK;
1991 sit_i->elapsed_time = le64_to_cpu(sbi->ckpt->elapsed_time);
1992 sit_i->mounted_time = CURRENT_TIME_SEC.tv_sec;
1993 mutex_init(&sit_i->sentry_lock);
1994 return 0;
1995}
1996
1997static int build_free_segmap(struct f2fs_sb_info *sbi)
1998{
351df4b2
JK		 1999 struct free_segmap_info *free_i;
2000 unsigned int bitmap_size, sec_bitmap_size;
2001
2002 /* allocate memory for free segmap information */
2003 free_i = kzalloc(sizeof(struct free_segmap_info), GFP_KERNEL);
2004 if (!free_i)
2005 return -ENOMEM;
2006
2007 SM_I(sbi)->free_info = free_i;
2008
7cd8558b 2009 bitmap_size = f2fs_bitmap_size(MAIN_SEGS(sbi));
351df4b2
JK		 2010 free_i->free_segmap = kmalloc(bitmap_size, GFP_KERNEL);
2011 if (!free_i->free_segmap)
2012 return -ENOMEM;
2013
7cd8558b 2014 sec_bitmap_size = f2fs_bitmap_size(MAIN_SECS(sbi));
351df4b2
JK		 2015 free_i->free_secmap = kmalloc(sec_bitmap_size, GFP_KERNEL);
2016 if (!free_i->free_secmap)
2017 return -ENOMEM;
2018
2019 /* set all segments as dirty temporarily */
2020 memset(free_i->free_segmap, 0xff, bitmap_size);
2021 memset(free_i->free_secmap, 0xff, sec_bitmap_size);
2022
2023 /* init free segmap information */
7cd8558b 2024 free_i->start_segno = GET_SEGNO_FROM_SEG0(sbi, MAIN_BLKADDR(sbi));
351df4b2
JK		 2025 free_i->free_segments = 0;
2026 free_i->free_sections = 0;
1a118ccf 2027 spin_lock_init(&free_i->segmap_lock);
351df4b2
JK		 2028 return 0;
2029}
2030
2031static int build_curseg(struct f2fs_sb_info *sbi)
2032{
1042d60f 2033 struct curseg_info *array;
351df4b2
JK		 2034 int i;
2035
b434babf 2036 array = kcalloc(NR_CURSEG_TYPE, sizeof(*array), GFP_KERNEL);
351df4b2
JK		 2037 if (!array)
2038 return -ENOMEM;
2039
2040 SM_I(sbi)->curseg_array = array;
2041
2042 for (i = 0; i < NR_CURSEG_TYPE; i++) {
2043 mutex_init(&array[i].curseg_mutex);
2044 array[i].sum_blk = kzalloc(PAGE_CACHE_SIZE, GFP_KERNEL);
2045 if (!array[i].sum_blk)
2046 return -ENOMEM;
2047 array[i].segno = NULL_SEGNO;
2048 array[i].next_blkoff = 0;
2049 }
2050 return restore_curseg_summaries(sbi);
2051}
2052
2053static void build_sit_entries(struct f2fs_sb_info *sbi)
2054{
2055 struct sit_info *sit_i = SIT_I(sbi);
2056 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA);
2057 struct f2fs_summary_block *sum = curseg->sum_blk;
74de593a
CY		 2058 int sit_blk_cnt = SIT_BLK_CNT(sbi);
2059 unsigned int i, start, end;
2060 unsigned int readed, start_blk = 0;
90a893c7 2061 int nrpages = MAX_BIO_BLOCKS(sbi);
351df4b2 2062
74de593a 2063 do {
662befda 2064 readed = ra_meta_pages(sbi, start_blk, nrpages, META_SIT);
74de593a
CY		 2065
2066 start = start_blk * sit_i->sents_per_block;
2067 end = (start_blk + readed) * sit_i->sents_per_block;
2068
7cd8558b 2069 for (; start < end && start < MAIN_SEGS(sbi); start++) {
74de593a
CY		 2070 struct seg_entry *se = &sit_i->sentries[start];
2071 struct f2fs_sit_block *sit_blk;
2072 struct f2fs_sit_entry sit;
2073 struct page *page;
2074
2075 mutex_lock(&curseg->curseg_mutex);
2076 for (i = 0; i < sits_in_cursum(sum); i++) {
6c311ec6
CF		 2077 if (le32_to_cpu(segno_in_journal(sum, i))
2078 == start) {
74de593a
CY		 2079 sit = sit_in_journal(sum, i);
2080 mutex_unlock(&curseg->curseg_mutex);
2081 goto got_it;
2082 }
351df4b2 2083 }
74de593a
CY		 2084 mutex_unlock(&curseg->curseg_mutex);
2085
2086 page = get_current_sit_page(sbi, start);
2087 sit_blk = (struct f2fs_sit_block *)page_address(page);
2088 sit = sit_blk->entries[SIT_ENTRY_OFFSET(sit_i, start)];
2089 f2fs_put_page(page, 1);
351df4b2 2090got_it:
74de593a
CY		 2091 check_block_count(sbi, start, &sit);
2092 seg_info_from_raw_sit(se, &sit);
a66cdd98
JK		 2093
2094 /* build discard map only one time */
2095 memcpy(se->discard_map, se->cur_valid_map, SIT_VBLOCK_MAP_SIZE);
2096 sbi->discard_blks += sbi->blocks_per_seg - se->valid_blocks;
2097
74de593a
CY		 2098 if (sbi->segs_per_sec > 1) {
2099 struct sec_entry *e = get_sec_entry(sbi, start);
2100 e->valid_blocks += se->valid_blocks;
2101 }
351df4b2 2102 }
74de593a
CY		 2103 start_blk += readed;
2104 } while (start_blk < sit_blk_cnt);
351df4b2
JK		 2105}
2106
2107static void init_free_segmap(struct f2fs_sb_info *sbi)
2108{
2109 unsigned int start;
2110 int type;
2111
7cd8558b 2112 for (start = 0; start < MAIN_SEGS(sbi); start++) {
351df4b2
JK		 2113 struct seg_entry *sentry = get_seg_entry(sbi, start);
2114 if (!sentry->valid_blocks)
2115 __set_free(sbi, start);
2116 }
2117
2118 /* set use the current segments */
2119 for (type = CURSEG_HOT_DATA; type <= CURSEG_COLD_NODE; type++) {
2120 struct curseg_info *curseg_t = CURSEG_I(sbi, type);
2121 __set_test_and_inuse(sbi, curseg_t->segno);
2122 }
2123}
2124
2125static void init_dirty_segmap(struct f2fs_sb_info *sbi)
2126{
2127 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
2128 struct free_segmap_info *free_i = FREE_I(sbi);
7cd8558b 2129 unsigned int segno = 0, offset = 0;
351df4b2
JK		 2130 unsigned short valid_blocks;
2131
8736fbf0 2132 while (1) {
351df4b2 2133 /* find dirty segment based on free segmap */
7cd8558b
JK		 2134 segno = find_next_inuse(free_i, MAIN_SEGS(sbi), offset);
2135 if (segno >= MAIN_SEGS(sbi))
351df4b2
JK		 2136 break;
2137 offset = segno + 1;
2138 valid_blocks = get_valid_blocks(sbi, segno, 0);
ec325b52 2139 if (valid_blocks == sbi->blocks_per_seg || !valid_blocks)
351df4b2 2140 continue;
ec325b52
JK		 2141 if (valid_blocks > sbi->blocks_per_seg) {
2142 f2fs_bug_on(sbi, 1);
2143 continue;
2144 }
351df4b2
JK		 2145 mutex_lock(&dirty_i->seglist_lock);
2146 __locate_dirty_segment(sbi, segno, DIRTY);
2147 mutex_unlock(&dirty_i->seglist_lock);
2148 }
2149}
2150
5ec4e49f 2151static int init_victim_secmap(struct f2fs_sb_info *sbi)
351df4b2
JK		 2152{
2153 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
7cd8558b 2154 unsigned int bitmap_size = f2fs_bitmap_size(MAIN_SECS(sbi));
351df4b2 2155
5ec4e49f
JK		 2156 dirty_i->victim_secmap = kzalloc(bitmap_size, GFP_KERNEL);
2157 if (!dirty_i->victim_secmap)
351df4b2
JK		 2158 return -ENOMEM;
2159 return 0;
2160}
2161
2162static int build_dirty_segmap(struct f2fs_sb_info *sbi)
2163{
2164 struct dirty_seglist_info *dirty_i;
2165 unsigned int bitmap_size, i;
2166
2167 /* allocate memory for dirty segments list information */
2168 dirty_i = kzalloc(sizeof(struct dirty_seglist_info), GFP_KERNEL);
2169 if (!dirty_i)
2170 return -ENOMEM;
2171
2172 SM_I(sbi)->dirty_info = dirty_i;
2173 mutex_init(&dirty_i->seglist_lock);
2174
7cd8558b 2175 bitmap_size = f2fs_bitmap_size(MAIN_SEGS(sbi));
351df4b2
JK		 2176
2177 for (i = 0; i < NR_DIRTY_TYPE; i++) {
2178 dirty_i->dirty_segmap[i] = kzalloc(bitmap_size, GFP_KERNEL);
351df4b2
JK		 2179 if (!dirty_i->dirty_segmap[i])
2180 return -ENOMEM;
2181 }
2182
2183 init_dirty_segmap(sbi);
5ec4e49f 2184 return init_victim_secmap(sbi);
351df4b2
JK		 2185}
2186
0a8165d7 2187/*
351df4b2
JK		 2188 * Update min, max modified time for cost-benefit GC algorithm
2189 */
2190static void init_min_max_mtime(struct f2fs_sb_info *sbi)
2191{
2192 struct sit_info *sit_i = SIT_I(sbi);
2193 unsigned int segno;
2194
2195 mutex_lock(&sit_i->sentry_lock);
2196
2197 sit_i->min_mtime = LLONG_MAX;
2198
7cd8558b 2199 for (segno = 0; segno < MAIN_SEGS(sbi); segno += sbi->segs_per_sec) {
351df4b2
JK		 2200 unsigned int i;
2201 unsigned long long mtime = 0;
2202
2203 for (i = 0; i < sbi->segs_per_sec; i++)
2204 mtime += get_seg_entry(sbi, segno + i)->mtime;
2205
2206 mtime = div_u64(mtime, sbi->segs_per_sec);
2207
2208 if (sit_i->min_mtime > mtime)
2209 sit_i->min_mtime = mtime;
2210 }
2211 sit_i->max_mtime = get_mtime(sbi);
2212 mutex_unlock(&sit_i->sentry_lock);
2213}
2214
2215int build_segment_manager(struct f2fs_sb_info *sbi)
2216{
2217 struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
2218 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1042d60f 2219 struct f2fs_sm_info *sm_info;
351df4b2
JK		 2220 int err;
2221
2222 sm_info = kzalloc(sizeof(struct f2fs_sm_info), GFP_KERNEL);
2223 if (!sm_info)
2224 return -ENOMEM;
2225
2226 /* init sm info */
2227 sbi->sm_info = sm_info;
351df4b2
JK		 2228 sm_info->seg0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr);
2229 sm_info->main_blkaddr = le32_to_cpu(raw_super->main_blkaddr);
2230 sm_info->segment_count = le32_to_cpu(raw_super->segment_count);
2231 sm_info->reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
2232 sm_info->ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
2233 sm_info->main_segments = le32_to_cpu(raw_super->segment_count_main);
2234 sm_info->ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
58c41035
JK		 2235 sm_info->rec_prefree_segments = sm_info->main_segments *
2236 DEF_RECLAIM_PREFREE_SEGMENTS / 100;
9b5f136f 2237 sm_info->ipu_policy = 1 << F2FS_IPU_FSYNC;
216fbd64 2238 sm_info->min_ipu_util = DEF_MIN_IPU_UTIL;
c1ce1b02 2239 sm_info->min_fsync_blocks = DEF_MIN_FSYNC_BLOCKS;
351df4b2 2240
7fd9e544
JK		 2241 INIT_LIST_HEAD(&sm_info->discard_list);
2242 sm_info->nr_discards = 0;
2243 sm_info->max_discards = 0;
2244
bba681cb
JK		 2245 sm_info->trim_sections = DEF_BATCHED_TRIM_SECTIONS;
2246
184a5cd2
CY		 2247 INIT_LIST_HEAD(&sm_info->sit_entry_set);
2248
b270ad6f 2249 if (test_opt(sbi, FLUSH_MERGE) && !f2fs_readonly(sbi->sb)) {
2163d198
GZ		 2250 err = create_flush_cmd_control(sbi);
2251 if (err)
a688b9d9 2252 return err;
6b4afdd7
JK		 2253 }
2254
351df4b2
JK		 2255 err = build_sit_info(sbi);
2256 if (err)
2257 return err;
2258 err = build_free_segmap(sbi);
2259 if (err)
2260 return err;
2261 err = build_curseg(sbi);
2262 if (err)
2263 return err;
2264
2265 /* reinit free segmap based on SIT */
2266 build_sit_entries(sbi);
2267
2268 init_free_segmap(sbi);
2269 err = build_dirty_segmap(sbi);
2270 if (err)
2271 return err;
2272
2273 init_min_max_mtime(sbi);
2274 return 0;
2275}
2276
2277static void discard_dirty_segmap(struct f2fs_sb_info *sbi,
2278 enum dirty_type dirty_type)
2279{
2280 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
2281
2282 mutex_lock(&dirty_i->seglist_lock);
2283 kfree(dirty_i->dirty_segmap[dirty_type]);
2284 dirty_i->nr_dirty[dirty_type] = 0;
2285 mutex_unlock(&dirty_i->seglist_lock);
2286}
2287
5ec4e49f 2288static void destroy_victim_secmap(struct f2fs_sb_info *sbi)
351df4b2
JK		 2289{
2290 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
5ec4e49f 2291 kfree(dirty_i->victim_secmap);
351df4b2
JK		 2292}
2293
2294static void destroy_dirty_segmap(struct f2fs_sb_info *sbi)
2295{
2296 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
2297 int i;
2298
2299 if (!dirty_i)
2300 return;
2301
2302 /* discard pre-free/dirty segments list */
2303 for (i = 0; i < NR_DIRTY_TYPE; i++)
2304 discard_dirty_segmap(sbi, i);
2305
5ec4e49f 2306 destroy_victim_secmap(sbi);
351df4b2
JK		 2307 SM_I(sbi)->dirty_info = NULL;
2308 kfree(dirty_i);
2309}
2310
2311static void destroy_curseg(struct f2fs_sb_info *sbi)
2312{
2313 struct curseg_info *array = SM_I(sbi)->curseg_array;
2314 int i;
2315
2316 if (!array)
2317 return;
2318 SM_I(sbi)->curseg_array = NULL;
2319 for (i = 0; i < NR_CURSEG_TYPE; i++)
2320 kfree(array[i].sum_blk);
2321 kfree(array);
2322}
2323
2324static void destroy_free_segmap(struct f2fs_sb_info *sbi)
2325{
2326 struct free_segmap_info *free_i = SM_I(sbi)->free_info;
2327 if (!free_i)
2328 return;
2329 SM_I(sbi)->free_info = NULL;
2330 kfree(free_i->free_segmap);
2331 kfree(free_i->free_secmap);
2332 kfree(free_i);
2333}
2334
2335static void destroy_sit_info(struct f2fs_sb_info *sbi)
2336{
2337 struct sit_info *sit_i = SIT_I(sbi);
2338 unsigned int start;
2339
2340 if (!sit_i)
2341 return;
2342
2343 if (sit_i->sentries) {
7cd8558b 2344 for (start = 0; start < MAIN_SEGS(sbi); start++) {
351df4b2
JK		 2345 kfree(sit_i->sentries[start].cur_valid_map);
2346 kfree(sit_i->sentries[start].ckpt_valid_map);
a66cdd98 2347 kfree(sit_i->sentries[start].discard_map);
351df4b2
JK		 2348 }
2349 }
60a3b782
JK		 2350 kfree(sit_i->tmp_map);
2351
351df4b2
JK		 2352 vfree(sit_i->sentries);
2353 vfree(sit_i->sec_entries);
2354 kfree(sit_i->dirty_sentries_bitmap);
2355
2356 SM_I(sbi)->sit_info = NULL;
2357 kfree(sit_i->sit_bitmap);
2358 kfree(sit_i);
2359}
2360
2361void destroy_segment_manager(struct f2fs_sb_info *sbi)
2362{
2363 struct f2fs_sm_info *sm_info = SM_I(sbi);
a688b9d9 2364
3b03f724
CY		 2365 if (!sm_info)
2366 return;
2163d198 2367 destroy_flush_cmd_control(sbi);
351df4b2
JK		 2368 destroy_dirty_segmap(sbi);
2369 destroy_curseg(sbi);
2370 destroy_free_segmap(sbi);
2371 destroy_sit_info(sbi);
2372 sbi->sm_info = NULL;
2373 kfree(sm_info);
2374}
7fd9e544
JK		 2375
2376int __init create_segment_manager_caches(void)
2377{
2378 discard_entry_slab = f2fs_kmem_cache_create("discard_entry",
e8512d2e 2379 sizeof(struct discard_entry));
7fd9e544 2380 if (!discard_entry_slab)
184a5cd2
CY		 2381 goto fail;
2382
2383 sit_entry_set_slab = f2fs_kmem_cache_create("sit_entry_set",
c9ee0085 2384 sizeof(struct sit_entry_set));
184a5cd2
CY		 2385 if (!sit_entry_set_slab)
2386 goto destory_discard_entry;
88b88a66
JK		 2387
2388 inmem_entry_slab = f2fs_kmem_cache_create("inmem_page_entry",
2389 sizeof(struct inmem_pages));
2390 if (!inmem_entry_slab)
2391 goto destroy_sit_entry_set;
7fd9e544 2392 return 0;
184a5cd2 2393
88b88a66
JK		 2394destroy_sit_entry_set:
2395 kmem_cache_destroy(sit_entry_set_slab);
184a5cd2
CY		 2396destory_discard_entry:
2397 kmem_cache_destroy(discard_entry_slab);
2398fail:
2399 return -ENOMEM;
7fd9e544
JK		 2400}
2401
2402void destroy_segment_manager_caches(void)
2403{
184a5cd2 2404 kmem_cache_destroy(sit_entry_set_slab);
7fd9e544 2405 kmem_cache_destroy(discard_entry_slab);
88b88a66 2406 kmem_cache_destroy(inmem_entry_slab);
7fd9e544 2407}
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