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11#include <linux/fs.h>
12#include <linux/f2fs_fs.h>
13#include <linux/bio.h>
14#include <linux/blkdev.h>
15#include <linux/prefetch.h>
16#include <linux/vmalloc.h>
17
18#include "f2fs.h"
19#include "segment.h"
20#include "node.h"
21#include <trace/events/f2fs.h>
22
23
24
25
26
27void f2fs_balance_fs(struct f2fs_sb_info *sbi)
28{
29
30
31
32
33 if (has_not_enough_free_secs(sbi, 0)) {
34 mutex_lock(&sbi->gc_mutex);
35 f2fs_gc(sbi);
36 }
37}
38
39static void __locate_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno,
40 enum dirty_type dirty_type)
41{
42 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
43
44
45 if (IS_CURSEG(sbi, segno))
46 return;
47
48 if (!test_and_set_bit(segno, dirty_i->dirty_segmap[dirty_type]))
49 dirty_i->nr_dirty[dirty_type]++;
50
51 if (dirty_type == DIRTY) {
52 struct seg_entry *sentry = get_seg_entry(sbi, segno);
53 enum dirty_type t = DIRTY_HOT_DATA;
54
55 dirty_type = sentry->type;
56
57 if (!test_and_set_bit(segno, dirty_i->dirty_segmap[dirty_type]))
58 dirty_i->nr_dirty[dirty_type]++;
59
60
61 for (; t <= DIRTY_COLD_NODE; t++) {
62 if (t == dirty_type)
63 continue;
64 if (test_and_clear_bit(segno, dirty_i->dirty_segmap[t]))
65 dirty_i->nr_dirty[t]--;
66 }
67 }
68}
69
70static void __remove_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno,
71 enum dirty_type dirty_type)
72{
73 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
74
75 if (test_and_clear_bit(segno, dirty_i->dirty_segmap[dirty_type]))
76 dirty_i->nr_dirty[dirty_type]--;
77
78 if (dirty_type == DIRTY) {
79 enum dirty_type t = DIRTY_HOT_DATA;
80
81
82 for (; t <= DIRTY_COLD_NODE; t++)
83 if (test_and_clear_bit(segno, dirty_i->dirty_segmap[t]))
84 dirty_i->nr_dirty[t]--;
85
86 if (get_valid_blocks(sbi, segno, sbi->segs_per_sec) == 0)
87 clear_bit(GET_SECNO(sbi, segno),
88 dirty_i->victim_secmap);
89 }
90}
91
92
93
94
95
96
97void locate_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno)
98{
99 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
100 unsigned short valid_blocks;
101
102 if (segno == NULL_SEGNO || IS_CURSEG(sbi, segno))
103 return;
104
105 mutex_lock(&dirty_i->seglist_lock);
106
107 valid_blocks = get_valid_blocks(sbi, segno, 0);
108
109 if (valid_blocks == 0) {
110 __locate_dirty_segment(sbi, segno, PRE);
111 __remove_dirty_segment(sbi, segno, DIRTY);
112 } else if (valid_blocks < sbi->blocks_per_seg) {
113 __locate_dirty_segment(sbi, segno, DIRTY);
114 } else {
115
116 __remove_dirty_segment(sbi, segno, DIRTY);
117 }
118
119 mutex_unlock(&dirty_i->seglist_lock);
120 return;
121}
122
123
124
125
126static void set_prefree_as_free_segments(struct f2fs_sb_info *sbi)
127{
128 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
129 unsigned int segno, offset = 0;
130 unsigned int total_segs = TOTAL_SEGS(sbi);
131
132 mutex_lock(&dirty_i->seglist_lock);
133 while (1) {
134 segno = find_next_bit(dirty_i->dirty_segmap[PRE], total_segs,
135 offset);
136 if (segno >= total_segs)
137 break;
138 __set_test_and_free(sbi, segno);
139 offset = segno + 1;
140 }
141 mutex_unlock(&dirty_i->seglist_lock);
142}
143
144void clear_prefree_segments(struct f2fs_sb_info *sbi)
145{
146 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
147 unsigned int segno, offset = 0;
148 unsigned int total_segs = TOTAL_SEGS(sbi);
149
150 mutex_lock(&dirty_i->seglist_lock);
151 while (1) {
152 segno = find_next_bit(dirty_i->dirty_segmap[PRE], total_segs,
153 offset);
154 if (segno >= total_segs)
155 break;
156
157 offset = segno + 1;
158 if (test_and_clear_bit(segno, dirty_i->dirty_segmap[PRE]))
159 dirty_i->nr_dirty[PRE]--;
160
161
162 if (test_opt(sbi, DISCARD))
163 blkdev_issue_discard(sbi->sb->s_bdev,
164 START_BLOCK(sbi, segno) <<
165 sbi->log_sectors_per_block,
166 1 << (sbi->log_sectors_per_block +
167 sbi->log_blocks_per_seg),
168 GFP_NOFS, 0);
169 }
170 mutex_unlock(&dirty_i->seglist_lock);
171}
172
173static void __mark_sit_entry_dirty(struct f2fs_sb_info *sbi, unsigned int segno)
174{
175 struct sit_info *sit_i = SIT_I(sbi);
176 if (!__test_and_set_bit(segno, sit_i->dirty_sentries_bitmap))
177 sit_i->dirty_sentries++;
178}
179
180static void __set_sit_entry_type(struct f2fs_sb_info *sbi, int type,
181 unsigned int segno, int modified)
182{
183 struct seg_entry *se = get_seg_entry(sbi, segno);
184 se->type = type;
185 if (modified)
186 __mark_sit_entry_dirty(sbi, segno);
187}
188
189static void update_sit_entry(struct f2fs_sb_info *sbi, block_t blkaddr, int del)
190{
191 struct seg_entry *se;
192 unsigned int segno, offset;
193 long int new_vblocks;
194
195 segno = GET_SEGNO(sbi, blkaddr);
196
197 se = get_seg_entry(sbi, segno);
198 new_vblocks = se->valid_blocks + del;
199 offset = GET_SEGOFF_FROM_SEG0(sbi, blkaddr) & (sbi->blocks_per_seg - 1);
200
201 BUG_ON((new_vblocks >> (sizeof(unsigned short) << 3) ||
202 (new_vblocks > sbi->blocks_per_seg)));
203
204 se->valid_blocks = new_vblocks;
205 se->mtime = get_mtime(sbi);
206 SIT_I(sbi)->max_mtime = se->mtime;
207
208
209 if (del > 0) {
210 if (f2fs_set_bit(offset, se->cur_valid_map))
211 BUG();
212 } else {
213 if (!f2fs_clear_bit(offset, se->cur_valid_map))
214 BUG();
215 }
216 if (!f2fs_test_bit(offset, se->ckpt_valid_map))
217 se->ckpt_valid_blocks += del;
218
219 __mark_sit_entry_dirty(sbi, segno);
220
221
222 SIT_I(sbi)->written_valid_blocks += del;
223
224 if (sbi->segs_per_sec > 1)
225 get_sec_entry(sbi, segno)->valid_blocks += del;
226}
227
228static void refresh_sit_entry(struct f2fs_sb_info *sbi,
229 block_t old_blkaddr, block_t new_blkaddr)
230{
231 update_sit_entry(sbi, new_blkaddr, 1);
232 if (GET_SEGNO(sbi, old_blkaddr) != NULL_SEGNO)
233 update_sit_entry(sbi, old_blkaddr, -1);
234}
235
236void invalidate_blocks(struct f2fs_sb_info *sbi, block_t addr)
237{
238 unsigned int segno = GET_SEGNO(sbi, addr);
239 struct sit_info *sit_i = SIT_I(sbi);
240
241 BUG_ON(addr == NULL_ADDR);
242 if (addr == NEW_ADDR)
243 return;
244
245
246 mutex_lock(&sit_i->sentry_lock);
247
248 update_sit_entry(sbi, addr, -1);
249
250
251 locate_dirty_segment(sbi, segno);
252
253 mutex_unlock(&sit_i->sentry_lock);
254}
255
256
257
258
259static void __add_sum_entry(struct f2fs_sb_info *sbi, int type,
260 struct f2fs_summary *sum, unsigned short offset)
261{
262 struct curseg_info *curseg = CURSEG_I(sbi, type);
263 void *addr = curseg->sum_blk;
264 addr += offset * sizeof(struct f2fs_summary);
265 memcpy(addr, sum, sizeof(struct f2fs_summary));
266 return;
267}
268
269
270
271
272int npages_for_summary_flush(struct f2fs_sb_info *sbi)
273{
274 int total_size_bytes = 0;
275 int valid_sum_count = 0;
276 int i, sum_space;
277
278 for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) {
279 if (sbi->ckpt->alloc_type[i] == SSR)
280 valid_sum_count += sbi->blocks_per_seg;
281 else
282 valid_sum_count += curseg_blkoff(sbi, i);
283 }
284
285 total_size_bytes = valid_sum_count * (SUMMARY_SIZE + 1)
286 + sizeof(struct nat_journal) + 2
287 + sizeof(struct sit_journal) + 2;
288 sum_space = PAGE_CACHE_SIZE - SUM_FOOTER_SIZE;
289 if (total_size_bytes < sum_space)
290 return 1;
291 else if (total_size_bytes < 2 * sum_space)
292 return 2;
293 return 3;
294}
295
296
297
298
299struct page *get_sum_page(struct f2fs_sb_info *sbi, unsigned int segno)
300{
301 return get_meta_page(sbi, GET_SUM_BLOCK(sbi, segno));
302}
303
304static void write_sum_page(struct f2fs_sb_info *sbi,
305 struct f2fs_summary_block *sum_blk, block_t blk_addr)
306{
307 struct page *page = grab_meta_page(sbi, blk_addr);
308 void *kaddr = page_address(page);
309 memcpy(kaddr, sum_blk, PAGE_CACHE_SIZE);
310 set_page_dirty(page);
311 f2fs_put_page(page, 1);
312}
313
314static unsigned int check_prefree_segments(struct f2fs_sb_info *sbi, int type)
315{
316 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
317 unsigned long *prefree_segmap = dirty_i->dirty_segmap[PRE];
318 unsigned int segno;
319 unsigned int ofs = 0;
320
321
322
323
324
325 if (has_not_enough_free_secs(sbi, 0))
326 return NULL_SEGNO;
327
328
329
330
331
332 if (IS_NODESEG(type))
333 return NULL_SEGNO;
334next:
335 segno = find_next_bit(prefree_segmap, TOTAL_SEGS(sbi), ofs);
336 ofs += sbi->segs_per_sec;
337
338 if (segno < TOTAL_SEGS(sbi)) {
339 int i;
340
341
342 if (segno % sbi->segs_per_sec)
343 goto next;
344
345
346 if (sec_usage_check(sbi, GET_SECNO(sbi, segno)))
347 goto next;
348
349
350 for (i = 1; i < sbi->segs_per_sec; i++)
351 if (!test_bit(segno + i, prefree_segmap))
352 goto next;
353
354
355 for (i = 0; i < sbi->segs_per_sec; i++)
356 if (get_seg_entry(sbi, segno + i)->ckpt_valid_blocks)
357 goto next;
358
359 return segno;
360 }
361 return NULL_SEGNO;
362}
363
364static int is_next_segment_free(struct f2fs_sb_info *sbi, int type)
365{
366 struct curseg_info *curseg = CURSEG_I(sbi, type);
367 unsigned int segno = curseg->segno;
368 struct free_segmap_info *free_i = FREE_I(sbi);
369
370 if (segno + 1 < TOTAL_SEGS(sbi) && (segno + 1) % sbi->segs_per_sec)
371 return !test_bit(segno + 1, free_i->free_segmap);
372 return 0;
373}
374
375
376
377
378
379static void get_new_segment(struct f2fs_sb_info *sbi,
380 unsigned int *newseg, bool new_sec, int dir)
381{
382 struct free_segmap_info *free_i = FREE_I(sbi);
383 unsigned int segno, secno, zoneno;
384 unsigned int total_zones = TOTAL_SECS(sbi) / sbi->secs_per_zone;
385 unsigned int hint = *newseg / sbi->segs_per_sec;
386 unsigned int old_zoneno = GET_ZONENO_FROM_SEGNO(sbi, *newseg);
387 unsigned int left_start = hint;
388 bool init = true;
389 int go_left = 0;
390 int i;
391
392 write_lock(&free_i->segmap_lock);
393
394 if (!new_sec && ((*newseg + 1) % sbi->segs_per_sec)) {
395 segno = find_next_zero_bit(free_i->free_segmap,
396 TOTAL_SEGS(sbi), *newseg + 1);
397 if (segno - *newseg < sbi->segs_per_sec -
398 (*newseg % sbi->segs_per_sec))
399 goto got_it;
400 }
401find_other_zone:
402 secno = find_next_zero_bit(free_i->free_secmap, TOTAL_SECS(sbi), hint);
403 if (secno >= TOTAL_SECS(sbi)) {
404 if (dir == ALLOC_RIGHT) {
405 secno = find_next_zero_bit(free_i->free_secmap,
406 TOTAL_SECS(sbi), 0);
407 BUG_ON(secno >= TOTAL_SECS(sbi));
408 } else {
409 go_left = 1;
410 left_start = hint - 1;
411 }
412 }
413 if (go_left == 0)
414 goto skip_left;
415
416 while (test_bit(left_start, free_i->free_secmap)) {
417 if (left_start > 0) {
418 left_start--;
419 continue;
420 }
421 left_start = find_next_zero_bit(free_i->free_secmap,
422 TOTAL_SECS(sbi), 0);
423 BUG_ON(left_start >= TOTAL_SECS(sbi));
424 break;
425 }
426 secno = left_start;
427skip_left:
428 hint = secno;
429 segno = secno * sbi->segs_per_sec;
430 zoneno = secno / sbi->secs_per_zone;
431
432
433 if (!init)
434 goto got_it;
435 if (sbi->secs_per_zone == 1)
436 goto got_it;
437 if (zoneno == old_zoneno)
438 goto got_it;
439 if (dir == ALLOC_LEFT) {
440 if (!go_left && zoneno + 1 >= total_zones)
441 goto got_it;
442 if (go_left && zoneno == 0)
443 goto got_it;
444 }
445 for (i = 0; i < NR_CURSEG_TYPE; i++)
446 if (CURSEG_I(sbi, i)->zone == zoneno)
447 break;
448
449 if (i < NR_CURSEG_TYPE) {
450
451 if (go_left)
452 hint = zoneno * sbi->secs_per_zone - 1;
453 else if (zoneno + 1 >= total_zones)
454 hint = 0;
455 else
456 hint = (zoneno + 1) * sbi->secs_per_zone;
457 init = false;
458 goto find_other_zone;
459 }
460got_it:
461
462 BUG_ON(test_bit(segno, free_i->free_segmap));
463 __set_inuse(sbi, segno);
464 *newseg = segno;
465 write_unlock(&free_i->segmap_lock);
466}
467
468static void reset_curseg(struct f2fs_sb_info *sbi, int type, int modified)
469{
470 struct curseg_info *curseg = CURSEG_I(sbi, type);
471 struct summary_footer *sum_footer;
472
473 curseg->segno = curseg->next_segno;
474 curseg->zone = GET_ZONENO_FROM_SEGNO(sbi, curseg->segno);
475 curseg->next_blkoff = 0;
476 curseg->next_segno = NULL_SEGNO;
477
478 sum_footer = &(curseg->sum_blk->footer);
479 memset(sum_footer, 0, sizeof(struct summary_footer));
480 if (IS_DATASEG(type))
481 SET_SUM_TYPE(sum_footer, SUM_TYPE_DATA);
482 if (IS_NODESEG(type))
483 SET_SUM_TYPE(sum_footer, SUM_TYPE_NODE);
484 __set_sit_entry_type(sbi, type, curseg->segno, modified);
485}
486
487
488
489
490
491static void new_curseg(struct f2fs_sb_info *sbi, int type, bool new_sec)
492{
493 struct curseg_info *curseg = CURSEG_I(sbi, type);
494 unsigned int segno = curseg->segno;
495 int dir = ALLOC_LEFT;
496
497 write_sum_page(sbi, curseg->sum_blk,
498 GET_SUM_BLOCK(sbi, curseg->segno));
499 if (type == CURSEG_WARM_DATA || type == CURSEG_COLD_DATA)
500 dir = ALLOC_RIGHT;
501
502 if (test_opt(sbi, NOHEAP))
503 dir = ALLOC_RIGHT;
504
505 get_new_segment(sbi, &segno, new_sec, dir);
506 curseg->next_segno = segno;
507 reset_curseg(sbi, type, 1);
508 curseg->alloc_type = LFS;
509}
510
511static void __next_free_blkoff(struct f2fs_sb_info *sbi,
512 struct curseg_info *seg, block_t start)
513{
514 struct seg_entry *se = get_seg_entry(sbi, seg->segno);
515 block_t ofs;
516 for (ofs = start; ofs < sbi->blocks_per_seg; ofs++) {
517 if (!f2fs_test_bit(ofs, se->ckpt_valid_map)
518 && !f2fs_test_bit(ofs, se->cur_valid_map))
519 break;
520 }
521 seg->next_blkoff = ofs;
522}
523
524
525
526
527
528
529static void __refresh_next_blkoff(struct f2fs_sb_info *sbi,
530 struct curseg_info *seg)
531{
532 if (seg->alloc_type == SSR)
533 __next_free_blkoff(sbi, seg, seg->next_blkoff + 1);
534 else
535 seg->next_blkoff++;
536}
537
538
539
540
541
542static void change_curseg(struct f2fs_sb_info *sbi, int type, bool reuse)
543{
544 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
545 struct curseg_info *curseg = CURSEG_I(sbi, type);
546 unsigned int new_segno = curseg->next_segno;
547 struct f2fs_summary_block *sum_node;
548 struct page *sum_page;
549
550 write_sum_page(sbi, curseg->sum_blk,
551 GET_SUM_BLOCK(sbi, curseg->segno));
552 __set_test_and_inuse(sbi, new_segno);
553
554 mutex_lock(&dirty_i->seglist_lock);
555 __remove_dirty_segment(sbi, new_segno, PRE);
556 __remove_dirty_segment(sbi, new_segno, DIRTY);
557 mutex_unlock(&dirty_i->seglist_lock);
558
559 reset_curseg(sbi, type, 1);
560 curseg->alloc_type = SSR;
561 __next_free_blkoff(sbi, curseg, 0);
562
563 if (reuse) {
564 sum_page = get_sum_page(sbi, new_segno);
565 sum_node = (struct f2fs_summary_block *)page_address(sum_page);
566 memcpy(curseg->sum_blk, sum_node, SUM_ENTRY_SIZE);
567 f2fs_put_page(sum_page, 1);
568 }
569}
570
571static int get_ssr_segment(struct f2fs_sb_info *sbi, int type)
572{
573 struct curseg_info *curseg = CURSEG_I(sbi, type);
574 const struct victim_selection *v_ops = DIRTY_I(sbi)->v_ops;
575
576 if (IS_NODESEG(type) || !has_not_enough_free_secs(sbi, 0))
577 return v_ops->get_victim(sbi,
578 &(curseg)->next_segno, BG_GC, type, SSR);
579
580
581 for (; type >= CURSEG_HOT_DATA; type--)
582 if (v_ops->get_victim(sbi, &(curseg)->next_segno,
583 BG_GC, type, SSR))
584 return 1;
585 return 0;
586}
587
588
589
590
591
592static void allocate_segment_by_default(struct f2fs_sb_info *sbi,
593 int type, bool force)
594{
595 struct curseg_info *curseg = CURSEG_I(sbi, type);
596
597 if (force) {
598 new_curseg(sbi, type, true);
599 goto out;
600 }
601
602 curseg->next_segno = check_prefree_segments(sbi, type);
603
604 if (curseg->next_segno != NULL_SEGNO)
605 change_curseg(sbi, type, false);
606 else if (type == CURSEG_WARM_NODE)
607 new_curseg(sbi, type, false);
608 else if (curseg->alloc_type == LFS && is_next_segment_free(sbi, type))
609 new_curseg(sbi, type, false);
610 else if (need_SSR(sbi) && get_ssr_segment(sbi, type))
611 change_curseg(sbi, type, true);
612 else
613 new_curseg(sbi, type, false);
614out:
615 sbi->segment_count[curseg->alloc_type]++;
616}
617
618void allocate_new_segments(struct f2fs_sb_info *sbi)
619{
620 struct curseg_info *curseg;
621 unsigned int old_curseg;
622 int i;
623
624 for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) {
625 curseg = CURSEG_I(sbi, i);
626 old_curseg = curseg->segno;
627 SIT_I(sbi)->s_ops->allocate_segment(sbi, i, true);
628 locate_dirty_segment(sbi, old_curseg);
629 }
630}
631
632static const struct segment_allocation default_salloc_ops = {
633 .allocate_segment = allocate_segment_by_default,
634};
635
636static void f2fs_end_io_write(struct bio *bio, int err)
637{
638 struct bio_private *p = bio->bi_private;
639 struct bio_vec *bvec;
640 int i;
641
642 bio_for_each_segment_all(bvec, bio, i) {
643 struct page *page = bvec->bv_page;
644
645 if (err) {
646 SetPageError(page);
647 if (page->mapping)
648 set_bit(AS_EIO, &page->mapping->flags);
649 set_ckpt_flags(p->sbi->ckpt, CP_ERROR_FLAG);
650 p->sbi->sb->s_flags |= MS_RDONLY;
651 }
652 end_page_writeback(page);
653 dec_page_count(p->sbi, F2FS_WRITEBACK);
654 }
655
656 if (p->is_sync)
657 complete(p->wait);
658 kfree(p);
659 bio_put(bio);
660}
661
662struct bio *f2fs_bio_alloc(struct block_device *bdev, int npages)
663{
664 struct bio *bio;
665 struct bio_private *priv;
666retry:
667 priv = kmalloc(sizeof(struct bio_private), GFP_NOFS);
668 if (!priv) {
669 cond_resched();
670 goto retry;
671 }
672
673
674 bio = bio_alloc(GFP_NOIO, npages);
675 bio->bi_bdev = bdev;
676 bio->bi_private = priv;
677 return bio;
678}
679
680static void do_submit_bio(struct f2fs_sb_info *sbi,
681 enum page_type type, bool sync)
682{
683 int rw = sync ? WRITE_SYNC : WRITE;
684 enum page_type btype = type > META ? META : type;
685
686 if (type >= META_FLUSH)
687 rw = WRITE_FLUSH_FUA;
688
689 if (btype == META)
690 rw |= REQ_META;
691
692 if (sbi->bio[btype]) {
693 struct bio_private *p = sbi->bio[btype]->bi_private;
694 p->sbi = sbi;
695 sbi->bio[btype]->bi_end_io = f2fs_end_io_write;
696
697 trace_f2fs_do_submit_bio(sbi->sb, btype, sync, sbi->bio[btype]);
698
699 if (type == META_FLUSH) {
700 DECLARE_COMPLETION_ONSTACK(wait);
701 p->is_sync = true;
702 p->wait = &wait;
703 submit_bio(rw, sbi->bio[btype]);
704 wait_for_completion(&wait);
705 } else {
706 p->is_sync = false;
707 submit_bio(rw, sbi->bio[btype]);
708 }
709 sbi->bio[btype] = NULL;
710 }
711}
712
713void f2fs_submit_bio(struct f2fs_sb_info *sbi, enum page_type type, bool sync)
714{
715 down_write(&sbi->bio_sem);
716 do_submit_bio(sbi, type, sync);
717 up_write(&sbi->bio_sem);
718}
719
720static void submit_write_page(struct f2fs_sb_info *sbi, struct page *page,
721 block_t blk_addr, enum page_type type)
722{
723 struct block_device *bdev = sbi->sb->s_bdev;
724
725 verify_block_addr(sbi, blk_addr);
726
727 down_write(&sbi->bio_sem);
728
729 inc_page_count(sbi, F2FS_WRITEBACK);
730
731 if (sbi->bio[type] && sbi->last_block_in_bio[type] != blk_addr - 1)
732 do_submit_bio(sbi, type, false);
733alloc_new:
734 if (sbi->bio[type] == NULL) {
735 sbi->bio[type] = f2fs_bio_alloc(bdev, max_hw_blocks(sbi));
736 sbi->bio[type]->bi_sector = SECTOR_FROM_BLOCK(sbi, blk_addr);
737
738
739
740
741
742 }
743
744 if (bio_add_page(sbi->bio[type], page, PAGE_CACHE_SIZE, 0) <
745 PAGE_CACHE_SIZE) {
746 do_submit_bio(sbi, type, false);
747 goto alloc_new;
748 }
749
750 sbi->last_block_in_bio[type] = blk_addr;
751
752 up_write(&sbi->bio_sem);
753 trace_f2fs_submit_write_page(page, blk_addr, type);
754}
755
756static bool __has_curseg_space(struct f2fs_sb_info *sbi, int type)
757{
758 struct curseg_info *curseg = CURSEG_I(sbi, type);
759 if (curseg->next_blkoff < sbi->blocks_per_seg)
760 return true;
761 return false;
762}
763
764static int __get_segment_type_2(struct page *page, enum page_type p_type)
765{
766 if (p_type == DATA)
767 return CURSEG_HOT_DATA;
768 else
769 return CURSEG_HOT_NODE;
770}
771
772static int __get_segment_type_4(struct page *page, enum page_type p_type)
773{
774 if (p_type == DATA) {
775 struct inode *inode = page->mapping->host;
776
777 if (S_ISDIR(inode->i_mode))
778 return CURSEG_HOT_DATA;
779 else
780 return CURSEG_COLD_DATA;
781 } else {
782 if (IS_DNODE(page) && !is_cold_node(page))
783 return CURSEG_HOT_NODE;
784 else
785 return CURSEG_COLD_NODE;
786 }
787}
788
789static int __get_segment_type_6(struct page *page, enum page_type p_type)
790{
791 if (p_type == DATA) {
792 struct inode *inode = page->mapping->host;
793
794 if (S_ISDIR(inode->i_mode))
795 return CURSEG_HOT_DATA;
796 else if (is_cold_data(page) || is_cold_file(inode))
797 return CURSEG_COLD_DATA;
798 else
799 return CURSEG_WARM_DATA;
800 } else {
801 if (IS_DNODE(page))
802 return is_cold_node(page) ? CURSEG_WARM_NODE :
803 CURSEG_HOT_NODE;
804 else
805 return CURSEG_COLD_NODE;
806 }
807}
808
809static int __get_segment_type(struct page *page, enum page_type p_type)
810{
811 struct f2fs_sb_info *sbi = F2FS_SB(page->mapping->host->i_sb);
812 switch (sbi->active_logs) {
813 case 2:
814 return __get_segment_type_2(page, p_type);
815 case 4:
816 return __get_segment_type_4(page, p_type);
817 }
818
819 BUG_ON(sbi->active_logs != NR_CURSEG_TYPE);
820 return __get_segment_type_6(page, p_type);
821}
822
823static void do_write_page(struct f2fs_sb_info *sbi, struct page *page,
824 block_t old_blkaddr, block_t *new_blkaddr,
825 struct f2fs_summary *sum, enum page_type p_type)
826{
827 struct sit_info *sit_i = SIT_I(sbi);
828 struct curseg_info *curseg;
829 unsigned int old_cursegno;
830 int type;
831
832 type = __get_segment_type(page, p_type);
833 curseg = CURSEG_I(sbi, type);
834
835 mutex_lock(&curseg->curseg_mutex);
836
837 *new_blkaddr = NEXT_FREE_BLKADDR(sbi, curseg);
838 old_cursegno = curseg->segno;
839
840
841
842
843
844
845 __add_sum_entry(sbi, type, sum, curseg->next_blkoff);
846
847 mutex_lock(&sit_i->sentry_lock);
848 __refresh_next_blkoff(sbi, curseg);
849 sbi->block_count[curseg->alloc_type]++;
850
851
852
853
854
855 refresh_sit_entry(sbi, old_blkaddr, *new_blkaddr);
856
857 if (!__has_curseg_space(sbi, type))
858 sit_i->s_ops->allocate_segment(sbi, type, false);
859
860 locate_dirty_segment(sbi, old_cursegno);
861 locate_dirty_segment(sbi, GET_SEGNO(sbi, old_blkaddr));
862 mutex_unlock(&sit_i->sentry_lock);
863
864 if (p_type == NODE)
865 fill_node_footer_blkaddr(page, NEXT_FREE_BLKADDR(sbi, curseg));
866
867
868 submit_write_page(sbi, page, *new_blkaddr, p_type);
869
870 mutex_unlock(&curseg->curseg_mutex);
871}
872
873void write_meta_page(struct f2fs_sb_info *sbi, struct page *page)
874{
875 set_page_writeback(page);
876 submit_write_page(sbi, page, page->index, META);
877}
878
879void write_node_page(struct f2fs_sb_info *sbi, struct page *page,
880 unsigned int nid, block_t old_blkaddr, block_t *new_blkaddr)
881{
882 struct f2fs_summary sum;
883 set_summary(&sum, nid, 0, 0);
884 do_write_page(sbi, page, old_blkaddr, new_blkaddr, &sum, NODE);
885}
886
887void write_data_page(struct inode *inode, struct page *page,
888 struct dnode_of_data *dn, block_t old_blkaddr,
889 block_t *new_blkaddr)
890{
891 struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
892 struct f2fs_summary sum;
893 struct node_info ni;
894
895 BUG_ON(old_blkaddr == NULL_ADDR);
896 get_node_info(sbi, dn->nid, &ni);
897 set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version);
898
899 do_write_page(sbi, page, old_blkaddr,
900 new_blkaddr, &sum, DATA);
901}
902
903void rewrite_data_page(struct f2fs_sb_info *sbi, struct page *page,
904 block_t old_blk_addr)
905{
906 submit_write_page(sbi, page, old_blk_addr, DATA);
907}
908
909void recover_data_page(struct f2fs_sb_info *sbi,
910 struct page *page, struct f2fs_summary *sum,
911 block_t old_blkaddr, block_t new_blkaddr)
912{
913 struct sit_info *sit_i = SIT_I(sbi);
914 struct curseg_info *curseg;
915 unsigned int segno, old_cursegno;
916 struct seg_entry *se;
917 int type;
918
919 segno = GET_SEGNO(sbi, new_blkaddr);
920 se = get_seg_entry(sbi, segno);
921 type = se->type;
922
923 if (se->valid_blocks == 0 && !IS_CURSEG(sbi, segno)) {
924 if (old_blkaddr == NULL_ADDR)
925 type = CURSEG_COLD_DATA;
926 else
927 type = CURSEG_WARM_DATA;
928 }
929 curseg = CURSEG_I(sbi, type);
930
931 mutex_lock(&curseg->curseg_mutex);
932 mutex_lock(&sit_i->sentry_lock);
933
934 old_cursegno = curseg->segno;
935
936
937 if (segno != curseg->segno) {
938 curseg->next_segno = segno;
939 change_curseg(sbi, type, true);
940 }
941
942 curseg->next_blkoff = GET_SEGOFF_FROM_SEG0(sbi, new_blkaddr) &
943 (sbi->blocks_per_seg - 1);
944 __add_sum_entry(sbi, type, sum, curseg->next_blkoff);
945
946 refresh_sit_entry(sbi, old_blkaddr, new_blkaddr);
947
948 locate_dirty_segment(sbi, old_cursegno);
949 locate_dirty_segment(sbi, GET_SEGNO(sbi, old_blkaddr));
950
951 mutex_unlock(&sit_i->sentry_lock);
952 mutex_unlock(&curseg->curseg_mutex);
953}
954
955void rewrite_node_page(struct f2fs_sb_info *sbi,
956 struct page *page, struct f2fs_summary *sum,
957 block_t old_blkaddr, block_t new_blkaddr)
958{
959 struct sit_info *sit_i = SIT_I(sbi);
960 int type = CURSEG_WARM_NODE;
961 struct curseg_info *curseg;
962 unsigned int segno, old_cursegno;
963 block_t next_blkaddr = next_blkaddr_of_node(page);
964 unsigned int next_segno = GET_SEGNO(sbi, next_blkaddr);
965
966 curseg = CURSEG_I(sbi, type);
967
968 mutex_lock(&curseg->curseg_mutex);
969 mutex_lock(&sit_i->sentry_lock);
970
971 segno = GET_SEGNO(sbi, new_blkaddr);
972 old_cursegno = curseg->segno;
973
974
975 if (segno != curseg->segno) {
976 curseg->next_segno = segno;
977 change_curseg(sbi, type, true);
978 }
979 curseg->next_blkoff = GET_SEGOFF_FROM_SEG0(sbi, new_blkaddr) &
980 (sbi->blocks_per_seg - 1);
981 __add_sum_entry(sbi, type, sum, curseg->next_blkoff);
982
983
984 if (next_segno != segno) {
985 curseg->next_segno = next_segno;
986 change_curseg(sbi, type, true);
987 }
988 curseg->next_blkoff = GET_SEGOFF_FROM_SEG0(sbi, next_blkaddr) &
989 (sbi->blocks_per_seg - 1);
990
991
992 set_page_writeback(page);
993 submit_write_page(sbi, page, new_blkaddr, NODE);
994 f2fs_submit_bio(sbi, NODE, true);
995 refresh_sit_entry(sbi, old_blkaddr, new_blkaddr);
996
997 locate_dirty_segment(sbi, old_cursegno);
998 locate_dirty_segment(sbi, GET_SEGNO(sbi, old_blkaddr));
999
1000 mutex_unlock(&sit_i->sentry_lock);
1001 mutex_unlock(&curseg->curseg_mutex);
1002}
1003
1004static int read_compacted_summaries(struct f2fs_sb_info *sbi)
1005{
1006 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1007 struct curseg_info *seg_i;
1008 unsigned char *kaddr;
1009 struct page *page;
1010 block_t start;
1011 int i, j, offset;
1012
1013 start = start_sum_block(sbi);
1014
1015 page = get_meta_page(sbi, start++);
1016 kaddr = (unsigned char *)page_address(page);
1017
1018
1019 seg_i = CURSEG_I(sbi, CURSEG_HOT_DATA);
1020 memcpy(&seg_i->sum_blk->n_nats, kaddr, SUM_JOURNAL_SIZE);
1021
1022
1023 seg_i = CURSEG_I(sbi, CURSEG_COLD_DATA);
1024 memcpy(&seg_i->sum_blk->n_sits, kaddr + SUM_JOURNAL_SIZE,
1025 SUM_JOURNAL_SIZE);
1026 offset = 2 * SUM_JOURNAL_SIZE;
1027
1028
1029 for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) {
1030 unsigned short blk_off;
1031 unsigned int segno;
1032
1033 seg_i = CURSEG_I(sbi, i);
1034 segno = le32_to_cpu(ckpt->cur_data_segno[i]);
1035 blk_off = le16_to_cpu(ckpt->cur_data_blkoff[i]);
1036 seg_i->next_segno = segno;
1037 reset_curseg(sbi, i, 0);
1038 seg_i->alloc_type = ckpt->alloc_type[i];
1039 seg_i->next_blkoff = blk_off;
1040
1041 if (seg_i->alloc_type == SSR)
1042 blk_off = sbi->blocks_per_seg;
1043
1044 for (j = 0; j < blk_off; j++) {
1045 struct f2fs_summary *s;
1046 s = (struct f2fs_summary *)(kaddr + offset);
1047 seg_i->sum_blk->entries[j] = *s;
1048 offset += SUMMARY_SIZE;
1049 if (offset + SUMMARY_SIZE <= PAGE_CACHE_SIZE -
1050 SUM_FOOTER_SIZE)
1051 continue;
1052
1053 f2fs_put_page(page, 1);
1054 page = NULL;
1055
1056 page = get_meta_page(sbi, start++);
1057 kaddr = (unsigned char *)page_address(page);
1058 offset = 0;
1059 }
1060 }
1061 f2fs_put_page(page, 1);
1062 return 0;
1063}
1064
1065static int read_normal_summaries(struct f2fs_sb_info *sbi, int type)
1066{
1067 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1068 struct f2fs_summary_block *sum;
1069 struct curseg_info *curseg;
1070 struct page *new;
1071 unsigned short blk_off;
1072 unsigned int segno = 0;
1073 block_t blk_addr = 0;
1074
1075
1076 if (IS_DATASEG(type)) {
1077 segno = le32_to_cpu(ckpt->cur_data_segno[type]);
1078 blk_off = le16_to_cpu(ckpt->cur_data_blkoff[type -
1079 CURSEG_HOT_DATA]);
1080 if (is_set_ckpt_flags(ckpt, CP_UMOUNT_FLAG))
1081 blk_addr = sum_blk_addr(sbi, NR_CURSEG_TYPE, type);
1082 else
1083 blk_addr = sum_blk_addr(sbi, NR_CURSEG_DATA_TYPE, type);
1084 } else {
1085 segno = le32_to_cpu(ckpt->cur_node_segno[type -
1086 CURSEG_HOT_NODE]);
1087 blk_off = le16_to_cpu(ckpt->cur_node_blkoff[type -
1088 CURSEG_HOT_NODE]);
1089 if (is_set_ckpt_flags(ckpt, CP_UMOUNT_FLAG))
1090 blk_addr = sum_blk_addr(sbi, NR_CURSEG_NODE_TYPE,
1091 type - CURSEG_HOT_NODE);
1092 else
1093 blk_addr = GET_SUM_BLOCK(sbi, segno);
1094 }
1095
1096 new = get_meta_page(sbi, blk_addr);
1097 sum = (struct f2fs_summary_block *)page_address(new);
1098
1099 if (IS_NODESEG(type)) {
1100 if (is_set_ckpt_flags(ckpt, CP_UMOUNT_FLAG)) {
1101 struct f2fs_summary *ns = &sum->entries[0];
1102 int i;
1103 for (i = 0; i < sbi->blocks_per_seg; i++, ns++) {
1104 ns->version = 0;
1105 ns->ofs_in_node = 0;
1106 }
1107 } else {
1108 if (restore_node_summary(sbi, segno, sum)) {
1109 f2fs_put_page(new, 1);
1110 return -EINVAL;
1111 }
1112 }
1113 }
1114
1115
1116 curseg = CURSEG_I(sbi, type);
1117 mutex_lock(&curseg->curseg_mutex);
1118 memcpy(curseg->sum_blk, sum, PAGE_CACHE_SIZE);
1119 curseg->next_segno = segno;
1120 reset_curseg(sbi, type, 0);
1121 curseg->alloc_type = ckpt->alloc_type[type];
1122 curseg->next_blkoff = blk_off;
1123 mutex_unlock(&curseg->curseg_mutex);
1124 f2fs_put_page(new, 1);
1125 return 0;
1126}
1127
1128static int restore_curseg_summaries(struct f2fs_sb_info *sbi)
1129{
1130 int type = CURSEG_HOT_DATA;
1131
1132 if (is_set_ckpt_flags(F2FS_CKPT(sbi), CP_COMPACT_SUM_FLAG)) {
1133
1134 if (read_compacted_summaries(sbi))
1135 return -EINVAL;
1136 type = CURSEG_HOT_NODE;
1137 }
1138
1139 for (; type <= CURSEG_COLD_NODE; type++)
1140 if (read_normal_summaries(sbi, type))
1141 return -EINVAL;
1142 return 0;
1143}
1144
1145static void write_compacted_summaries(struct f2fs_sb_info *sbi, block_t blkaddr)
1146{
1147 struct page *page;
1148 unsigned char *kaddr;
1149 struct f2fs_summary *summary;
1150 struct curseg_info *seg_i;
1151 int written_size = 0;
1152 int i, j;
1153
1154 page = grab_meta_page(sbi, blkaddr++);
1155 kaddr = (unsigned char *)page_address(page);
1156
1157
1158 seg_i = CURSEG_I(sbi, CURSEG_HOT_DATA);
1159 memcpy(kaddr, &seg_i->sum_blk->n_nats, SUM_JOURNAL_SIZE);
1160 written_size += SUM_JOURNAL_SIZE;
1161
1162
1163 seg_i = CURSEG_I(sbi, CURSEG_COLD_DATA);
1164 memcpy(kaddr + written_size, &seg_i->sum_blk->n_sits,
1165 SUM_JOURNAL_SIZE);
1166 written_size += SUM_JOURNAL_SIZE;
1167
1168 set_page_dirty(page);
1169
1170
1171 for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) {
1172 unsigned short blkoff;
1173 seg_i = CURSEG_I(sbi, i);
1174 if (sbi->ckpt->alloc_type[i] == SSR)
1175 blkoff = sbi->blocks_per_seg;
1176 else
1177 blkoff = curseg_blkoff(sbi, i);
1178
1179 for (j = 0; j < blkoff; j++) {
1180 if (!page) {
1181 page = grab_meta_page(sbi, blkaddr++);
1182 kaddr = (unsigned char *)page_address(page);
1183 written_size = 0;
1184 }
1185 summary = (struct f2fs_summary *)(kaddr + written_size);
1186 *summary = seg_i->sum_blk->entries[j];
1187 written_size += SUMMARY_SIZE;
1188 set_page_dirty(page);
1189
1190 if (written_size + SUMMARY_SIZE <= PAGE_CACHE_SIZE -
1191 SUM_FOOTER_SIZE)
1192 continue;
1193
1194 f2fs_put_page(page, 1);
1195 page = NULL;
1196 }
1197 }
1198 if (page)
1199 f2fs_put_page(page, 1);
1200}
1201
1202static void write_normal_summaries(struct f2fs_sb_info *sbi,
1203 block_t blkaddr, int type)
1204{
1205 int i, end;
1206 if (IS_DATASEG(type))
1207 end = type + NR_CURSEG_DATA_TYPE;
1208 else
1209 end = type + NR_CURSEG_NODE_TYPE;
1210
1211 for (i = type; i < end; i++) {
1212 struct curseg_info *sum = CURSEG_I(sbi, i);
1213 mutex_lock(&sum->curseg_mutex);
1214 write_sum_page(sbi, sum->sum_blk, blkaddr + (i - type));
1215 mutex_unlock(&sum->curseg_mutex);
1216 }
1217}
1218
1219void write_data_summaries(struct f2fs_sb_info *sbi, block_t start_blk)
1220{
1221 if (is_set_ckpt_flags(F2FS_CKPT(sbi), CP_COMPACT_SUM_FLAG))
1222 write_compacted_summaries(sbi, start_blk);
1223 else
1224 write_normal_summaries(sbi, start_blk, CURSEG_HOT_DATA);
1225}
1226
1227void write_node_summaries(struct f2fs_sb_info *sbi, block_t start_blk)
1228{
1229 if (is_set_ckpt_flags(F2FS_CKPT(sbi), CP_UMOUNT_FLAG))
1230 write_normal_summaries(sbi, start_blk, CURSEG_HOT_NODE);
1231 return;
1232}
1233
1234int lookup_journal_in_cursum(struct f2fs_summary_block *sum, int type,
1235 unsigned int val, int alloc)
1236{
1237 int i;
1238
1239 if (type == NAT_JOURNAL) {
1240 for (i = 0; i < nats_in_cursum(sum); i++) {
1241 if (le32_to_cpu(nid_in_journal(sum, i)) == val)
1242 return i;
1243 }
1244 if (alloc && nats_in_cursum(sum) < NAT_JOURNAL_ENTRIES)
1245 return update_nats_in_cursum(sum, 1);
1246 } else if (type == SIT_JOURNAL) {
1247 for (i = 0; i < sits_in_cursum(sum); i++)
1248 if (le32_to_cpu(segno_in_journal(sum, i)) == val)
1249 return i;
1250 if (alloc && sits_in_cursum(sum) < SIT_JOURNAL_ENTRIES)
1251 return update_sits_in_cursum(sum, 1);
1252 }
1253 return -1;
1254}
1255
1256static struct page *get_current_sit_page(struct f2fs_sb_info *sbi,
1257 unsigned int segno)
1258{
1259 struct sit_info *sit_i = SIT_I(sbi);
1260 unsigned int offset = SIT_BLOCK_OFFSET(sit_i, segno);
1261 block_t blk_addr = sit_i->sit_base_addr + offset;
1262
1263 check_seg_range(sbi, segno);
1264
1265
1266 if (f2fs_test_bit(offset, sit_i->sit_bitmap))
1267 blk_addr += sit_i->sit_blocks;
1268
1269 return get_meta_page(sbi, blk_addr);
1270}
1271
1272static struct page *get_next_sit_page(struct f2fs_sb_info *sbi,
1273 unsigned int start)
1274{
1275 struct sit_info *sit_i = SIT_I(sbi);
1276 struct page *src_page, *dst_page;
1277 pgoff_t src_off, dst_off;
1278 void *src_addr, *dst_addr;
1279
1280 src_off = current_sit_addr(sbi, start);
1281 dst_off = next_sit_addr(sbi, src_off);
1282
1283
1284 src_page = get_meta_page(sbi, src_off);
1285 dst_page = grab_meta_page(sbi, dst_off);
1286 BUG_ON(PageDirty(src_page));
1287
1288 src_addr = page_address(src_page);
1289 dst_addr = page_address(dst_page);
1290 memcpy(dst_addr, src_addr, PAGE_CACHE_SIZE);
1291
1292 set_page_dirty(dst_page);
1293 f2fs_put_page(src_page, 1);
1294
1295 set_to_next_sit(sit_i, start);
1296
1297 return dst_page;
1298}
1299
1300static bool flush_sits_in_journal(struct f2fs_sb_info *sbi)
1301{
1302 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA);
1303 struct f2fs_summary_block *sum = curseg->sum_blk;
1304 int i;
1305
1306
1307
1308
1309
1310
1311 if (sits_in_cursum(sum) >= SIT_JOURNAL_ENTRIES) {
1312 for (i = sits_in_cursum(sum) - 1; i >= 0; i--) {
1313 unsigned int segno;
1314 segno = le32_to_cpu(segno_in_journal(sum, i));
1315 __mark_sit_entry_dirty(sbi, segno);
1316 }
1317 update_sits_in_cursum(sum, -sits_in_cursum(sum));
1318 return 1;
1319 }
1320 return 0;
1321}
1322
1323
1324
1325
1326
1327void flush_sit_entries(struct f2fs_sb_info *sbi)
1328{
1329 struct sit_info *sit_i = SIT_I(sbi);
1330 unsigned long *bitmap = sit_i->dirty_sentries_bitmap;
1331 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA);
1332 struct f2fs_summary_block *sum = curseg->sum_blk;
1333 unsigned long nsegs = TOTAL_SEGS(sbi);
1334 struct page *page = NULL;
1335 struct f2fs_sit_block *raw_sit = NULL;
1336 unsigned int start = 0, end = 0;
1337 unsigned int segno = -1;
1338 bool flushed;
1339
1340 mutex_lock(&curseg->curseg_mutex);
1341 mutex_lock(&sit_i->sentry_lock);
1342
1343
1344
1345
1346
1347 flushed = flush_sits_in_journal(sbi);
1348
1349 while ((segno = find_next_bit(bitmap, nsegs, segno + 1)) < nsegs) {
1350 struct seg_entry *se = get_seg_entry(sbi, segno);
1351 int sit_offset, offset;
1352
1353 sit_offset = SIT_ENTRY_OFFSET(sit_i, segno);
1354
1355 if (flushed)
1356 goto to_sit_page;
1357
1358 offset = lookup_journal_in_cursum(sum, SIT_JOURNAL, segno, 1);
1359 if (offset >= 0) {
1360 segno_in_journal(sum, offset) = cpu_to_le32(segno);
1361 seg_info_to_raw_sit(se, &sit_in_journal(sum, offset));
1362 goto flush_done;
1363 }
1364to_sit_page:
1365 if (!page || (start > segno) || (segno > end)) {
1366 if (page) {
1367 f2fs_put_page(page, 1);
1368 page = NULL;
1369 }
1370
1371 start = START_SEGNO(sit_i, segno);
1372 end = start + SIT_ENTRY_PER_BLOCK - 1;
1373
1374
1375 page = get_next_sit_page(sbi, start);
1376 raw_sit = page_address(page);
1377 }
1378
1379
1380 seg_info_to_raw_sit(se, &raw_sit->entries[sit_offset]);
1381flush_done:
1382 __clear_bit(segno, bitmap);
1383 sit_i->dirty_sentries--;
1384 }
1385 mutex_unlock(&sit_i->sentry_lock);
1386 mutex_unlock(&curseg->curseg_mutex);
1387
1388
1389 f2fs_put_page(page, 1);
1390
1391 set_prefree_as_free_segments(sbi);
1392}
1393
1394static int build_sit_info(struct f2fs_sb_info *sbi)
1395{
1396 struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
1397 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1398 struct sit_info *sit_i;
1399 unsigned int sit_segs, start;
1400 char *src_bitmap, *dst_bitmap;
1401 unsigned int bitmap_size;
1402
1403
1404 sit_i = kzalloc(sizeof(struct sit_info), GFP_KERNEL);
1405 if (!sit_i)
1406 return -ENOMEM;
1407
1408 SM_I(sbi)->sit_info = sit_i;
1409
1410 sit_i->sentries = vzalloc(TOTAL_SEGS(sbi) * sizeof(struct seg_entry));
1411 if (!sit_i->sentries)
1412 return -ENOMEM;
1413
1414 bitmap_size = f2fs_bitmap_size(TOTAL_SEGS(sbi));
1415 sit_i->dirty_sentries_bitmap = kzalloc(bitmap_size, GFP_KERNEL);
1416 if (!sit_i->dirty_sentries_bitmap)
1417 return -ENOMEM;
1418
1419 for (start = 0; start < TOTAL_SEGS(sbi); start++) {
1420 sit_i->sentries[start].cur_valid_map
1421 = kzalloc(SIT_VBLOCK_MAP_SIZE, GFP_KERNEL);
1422 sit_i->sentries[start].ckpt_valid_map
1423 = kzalloc(SIT_VBLOCK_MAP_SIZE, GFP_KERNEL);
1424 if (!sit_i->sentries[start].cur_valid_map
1425 || !sit_i->sentries[start].ckpt_valid_map)
1426 return -ENOMEM;
1427 }
1428
1429 if (sbi->segs_per_sec > 1) {
1430 sit_i->sec_entries = vzalloc(TOTAL_SECS(sbi) *
1431 sizeof(struct sec_entry));
1432 if (!sit_i->sec_entries)
1433 return -ENOMEM;
1434 }
1435
1436
1437 sit_segs = le32_to_cpu(raw_super->segment_count_sit) >> 1;
1438
1439
1440 bitmap_size = __bitmap_size(sbi, SIT_BITMAP);
1441 src_bitmap = __bitmap_ptr(sbi, SIT_BITMAP);
1442
1443 dst_bitmap = kmemdup(src_bitmap, bitmap_size, GFP_KERNEL);
1444 if (!dst_bitmap)
1445 return -ENOMEM;
1446
1447
1448 sit_i->s_ops = &default_salloc_ops;
1449
1450 sit_i->sit_base_addr = le32_to_cpu(raw_super->sit_blkaddr);
1451 sit_i->sit_blocks = sit_segs << sbi->log_blocks_per_seg;
1452 sit_i->written_valid_blocks = le64_to_cpu(ckpt->valid_block_count);
1453 sit_i->sit_bitmap = dst_bitmap;
1454 sit_i->bitmap_size = bitmap_size;
1455 sit_i->dirty_sentries = 0;
1456 sit_i->sents_per_block = SIT_ENTRY_PER_BLOCK;
1457 sit_i->elapsed_time = le64_to_cpu(sbi->ckpt->elapsed_time);
1458 sit_i->mounted_time = CURRENT_TIME_SEC.tv_sec;
1459 mutex_init(&sit_i->sentry_lock);
1460 return 0;
1461}
1462
1463static int build_free_segmap(struct f2fs_sb_info *sbi)
1464{
1465 struct f2fs_sm_info *sm_info = SM_I(sbi);
1466 struct free_segmap_info *free_i;
1467 unsigned int bitmap_size, sec_bitmap_size;
1468
1469
1470 free_i = kzalloc(sizeof(struct free_segmap_info), GFP_KERNEL);
1471 if (!free_i)
1472 return -ENOMEM;
1473
1474 SM_I(sbi)->free_info = free_i;
1475
1476 bitmap_size = f2fs_bitmap_size(TOTAL_SEGS(sbi));
1477 free_i->free_segmap = kmalloc(bitmap_size, GFP_KERNEL);
1478 if (!free_i->free_segmap)
1479 return -ENOMEM;
1480
1481 sec_bitmap_size = f2fs_bitmap_size(TOTAL_SECS(sbi));
1482 free_i->free_secmap = kmalloc(sec_bitmap_size, GFP_KERNEL);
1483 if (!free_i->free_secmap)
1484 return -ENOMEM;
1485
1486
1487 memset(free_i->free_segmap, 0xff, bitmap_size);
1488 memset(free_i->free_secmap, 0xff, sec_bitmap_size);
1489
1490
1491 free_i->start_segno =
1492 (unsigned int) GET_SEGNO_FROM_SEG0(sbi, sm_info->main_blkaddr);
1493 free_i->free_segments = 0;
1494 free_i->free_sections = 0;
1495 rwlock_init(&free_i->segmap_lock);
1496 return 0;
1497}
1498
1499static int build_curseg(struct f2fs_sb_info *sbi)
1500{
1501 struct curseg_info *array;
1502 int i;
1503
1504 array = kzalloc(sizeof(*array) * NR_CURSEG_TYPE, GFP_KERNEL);
1505 if (!array)
1506 return -ENOMEM;
1507
1508 SM_I(sbi)->curseg_array = array;
1509
1510 for (i = 0; i < NR_CURSEG_TYPE; i++) {
1511 mutex_init(&array[i].curseg_mutex);
1512 array[i].sum_blk = kzalloc(PAGE_CACHE_SIZE, GFP_KERNEL);
1513 if (!array[i].sum_blk)
1514 return -ENOMEM;
1515 array[i].segno = NULL_SEGNO;
1516 array[i].next_blkoff = 0;
1517 }
1518 return restore_curseg_summaries(sbi);
1519}
1520
1521static void build_sit_entries(struct f2fs_sb_info *sbi)
1522{
1523 struct sit_info *sit_i = SIT_I(sbi);
1524 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA);
1525 struct f2fs_summary_block *sum = curseg->sum_blk;
1526 unsigned int start;
1527
1528 for (start = 0; start < TOTAL_SEGS(sbi); start++) {
1529 struct seg_entry *se = &sit_i->sentries[start];
1530 struct f2fs_sit_block *sit_blk;
1531 struct f2fs_sit_entry sit;
1532 struct page *page;
1533 int i;
1534
1535 mutex_lock(&curseg->curseg_mutex);
1536 for (i = 0; i < sits_in_cursum(sum); i++) {
1537 if (le32_to_cpu(segno_in_journal(sum, i)) == start) {
1538 sit = sit_in_journal(sum, i);
1539 mutex_unlock(&curseg->curseg_mutex);
1540 goto got_it;
1541 }
1542 }
1543 mutex_unlock(&curseg->curseg_mutex);
1544 page = get_current_sit_page(sbi, start);
1545 sit_blk = (struct f2fs_sit_block *)page_address(page);
1546 sit = sit_blk->entries[SIT_ENTRY_OFFSET(sit_i, start)];
1547 f2fs_put_page(page, 1);
1548got_it:
1549 check_block_count(sbi, start, &sit);
1550 seg_info_from_raw_sit(se, &sit);
1551 if (sbi->segs_per_sec > 1) {
1552 struct sec_entry *e = get_sec_entry(sbi, start);
1553 e->valid_blocks += se->valid_blocks;
1554 }
1555 }
1556}
1557
1558static void init_free_segmap(struct f2fs_sb_info *sbi)
1559{
1560 unsigned int start;
1561 int type;
1562
1563 for (start = 0; start < TOTAL_SEGS(sbi); start++) {
1564 struct seg_entry *sentry = get_seg_entry(sbi, start);
1565 if (!sentry->valid_blocks)
1566 __set_free(sbi, start);
1567 }
1568
1569
1570 for (type = CURSEG_HOT_DATA; type <= CURSEG_COLD_NODE; type++) {
1571 struct curseg_info *curseg_t = CURSEG_I(sbi, type);
1572 __set_test_and_inuse(sbi, curseg_t->segno);
1573 }
1574}
1575
1576static void init_dirty_segmap(struct f2fs_sb_info *sbi)
1577{
1578 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
1579 struct free_segmap_info *free_i = FREE_I(sbi);
1580 unsigned int segno = 0, offset = 0;
1581 unsigned short valid_blocks;
1582
1583 while (segno < TOTAL_SEGS(sbi)) {
1584
1585 segno = find_next_inuse(free_i, TOTAL_SEGS(sbi), offset);
1586 if (segno >= TOTAL_SEGS(sbi))
1587 break;
1588 offset = segno + 1;
1589 valid_blocks = get_valid_blocks(sbi, segno, 0);
1590 if (valid_blocks >= sbi->blocks_per_seg || !valid_blocks)
1591 continue;
1592 mutex_lock(&dirty_i->seglist_lock);
1593 __locate_dirty_segment(sbi, segno, DIRTY);
1594 mutex_unlock(&dirty_i->seglist_lock);
1595 }
1596}
1597
1598static int init_victim_secmap(struct f2fs_sb_info *sbi)
1599{
1600 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
1601 unsigned int bitmap_size = f2fs_bitmap_size(TOTAL_SECS(sbi));
1602
1603 dirty_i->victim_secmap = kzalloc(bitmap_size, GFP_KERNEL);
1604 if (!dirty_i->victim_secmap)
1605 return -ENOMEM;
1606 return 0;
1607}
1608
1609static int build_dirty_segmap(struct f2fs_sb_info *sbi)
1610{
1611 struct dirty_seglist_info *dirty_i;
1612 unsigned int bitmap_size, i;
1613
1614
1615 dirty_i = kzalloc(sizeof(struct dirty_seglist_info), GFP_KERNEL);
1616 if (!dirty_i)
1617 return -ENOMEM;
1618
1619 SM_I(sbi)->dirty_info = dirty_i;
1620 mutex_init(&dirty_i->seglist_lock);
1621
1622 bitmap_size = f2fs_bitmap_size(TOTAL_SEGS(sbi));
1623
1624 for (i = 0; i < NR_DIRTY_TYPE; i++) {
1625 dirty_i->dirty_segmap[i] = kzalloc(bitmap_size, GFP_KERNEL);
1626 if (!dirty_i->dirty_segmap[i])
1627 return -ENOMEM;
1628 }
1629
1630 init_dirty_segmap(sbi);
1631 return init_victim_secmap(sbi);
1632}
1633
1634
1635
1636
1637static void init_min_max_mtime(struct f2fs_sb_info *sbi)
1638{
1639 struct sit_info *sit_i = SIT_I(sbi);
1640 unsigned int segno;
1641
1642 mutex_lock(&sit_i->sentry_lock);
1643
1644 sit_i->min_mtime = LLONG_MAX;
1645
1646 for (segno = 0; segno < TOTAL_SEGS(sbi); segno += sbi->segs_per_sec) {
1647 unsigned int i;
1648 unsigned long long mtime = 0;
1649
1650 for (i = 0; i < sbi->segs_per_sec; i++)
1651 mtime += get_seg_entry(sbi, segno + i)->mtime;
1652
1653 mtime = div_u64(mtime, sbi->segs_per_sec);
1654
1655 if (sit_i->min_mtime > mtime)
1656 sit_i->min_mtime = mtime;
1657 }
1658 sit_i->max_mtime = get_mtime(sbi);
1659 mutex_unlock(&sit_i->sentry_lock);
1660}
1661
1662int build_segment_manager(struct f2fs_sb_info *sbi)
1663{
1664 struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
1665 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1666 struct f2fs_sm_info *sm_info;
1667 int err;
1668
1669 sm_info = kzalloc(sizeof(struct f2fs_sm_info), GFP_KERNEL);
1670 if (!sm_info)
1671 return -ENOMEM;
1672
1673
1674 sbi->sm_info = sm_info;
1675 INIT_LIST_HEAD(&sm_info->wblist_head);
1676 spin_lock_init(&sm_info->wblist_lock);
1677 sm_info->seg0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr);
1678 sm_info->main_blkaddr = le32_to_cpu(raw_super->main_blkaddr);
1679 sm_info->segment_count = le32_to_cpu(raw_super->segment_count);
1680 sm_info->reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
1681 sm_info->ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
1682 sm_info->main_segments = le32_to_cpu(raw_super->segment_count_main);
1683 sm_info->ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
1684
1685 err = build_sit_info(sbi);
1686 if (err)
1687 return err;
1688 err = build_free_segmap(sbi);
1689 if (err)
1690 return err;
1691 err = build_curseg(sbi);
1692 if (err)
1693 return err;
1694
1695
1696 build_sit_entries(sbi);
1697
1698 init_free_segmap(sbi);
1699 err = build_dirty_segmap(sbi);
1700 if (err)
1701 return err;
1702
1703 init_min_max_mtime(sbi);
1704 return 0;
1705}
1706
1707static void discard_dirty_segmap(struct f2fs_sb_info *sbi,
1708 enum dirty_type dirty_type)
1709{
1710 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
1711
1712 mutex_lock(&dirty_i->seglist_lock);
1713 kfree(dirty_i->dirty_segmap[dirty_type]);
1714 dirty_i->nr_dirty[dirty_type] = 0;
1715 mutex_unlock(&dirty_i->seglist_lock);
1716}
1717
1718static void destroy_victim_secmap(struct f2fs_sb_info *sbi)
1719{
1720 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
1721 kfree(dirty_i->victim_secmap);
1722}
1723
1724static void destroy_dirty_segmap(struct f2fs_sb_info *sbi)
1725{
1726 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
1727 int i;
1728
1729 if (!dirty_i)
1730 return;
1731
1732
1733 for (i = 0; i < NR_DIRTY_TYPE; i++)
1734 discard_dirty_segmap(sbi, i);
1735
1736 destroy_victim_secmap(sbi);
1737 SM_I(sbi)->dirty_info = NULL;
1738 kfree(dirty_i);
1739}
1740
1741static void destroy_curseg(struct f2fs_sb_info *sbi)
1742{
1743 struct curseg_info *array = SM_I(sbi)->curseg_array;
1744 int i;
1745
1746 if (!array)
1747 return;
1748 SM_I(sbi)->curseg_array = NULL;
1749 for (i = 0; i < NR_CURSEG_TYPE; i++)
1750 kfree(array[i].sum_blk);
1751 kfree(array);
1752}
1753
1754static void destroy_free_segmap(struct f2fs_sb_info *sbi)
1755{
1756 struct free_segmap_info *free_i = SM_I(sbi)->free_info;
1757 if (!free_i)
1758 return;
1759 SM_I(sbi)->free_info = NULL;
1760 kfree(free_i->free_segmap);
1761 kfree(free_i->free_secmap);
1762 kfree(free_i);
1763}
1764
1765static void destroy_sit_info(struct f2fs_sb_info *sbi)
1766{
1767 struct sit_info *sit_i = SIT_I(sbi);
1768 unsigned int start;
1769
1770 if (!sit_i)
1771 return;
1772
1773 if (sit_i->sentries) {
1774 for (start = 0; start < TOTAL_SEGS(sbi); start++) {
1775 kfree(sit_i->sentries[start].cur_valid_map);
1776 kfree(sit_i->sentries[start].ckpt_valid_map);
1777 }
1778 }
1779 vfree(sit_i->sentries);
1780 vfree(sit_i->sec_entries);
1781 kfree(sit_i->dirty_sentries_bitmap);
1782
1783 SM_I(sbi)->sit_info = NULL;
1784 kfree(sit_i->sit_bitmap);
1785 kfree(sit_i);
1786}
1787
1788void destroy_segment_manager(struct f2fs_sb_info *sbi)
1789{
1790 struct f2fs_sm_info *sm_info = SM_I(sbi);
1791 destroy_dirty_segmap(sbi);
1792 destroy_curseg(sbi);
1793 destroy_free_segmap(sbi);
1794 destroy_sit_info(sbi);
1795 sbi->sm_info = NULL;
1796 kfree(sm_info);
1797}
1798
