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8#include <linux/fs.h>
9#include <linux/module.h>
10#include <linux/init.h>
11#include <linux/f2fs_fs.h>
12#include <linux/kthread.h>
13#include <linux/delay.h>
14#include <linux/freezer.h>
15#include <linux/sched/signal.h>
16#include <linux/random.h>
17#include <linux/sched/mm.h>
18
19#include "f2fs.h"
20#include "node.h"
21#include "segment.h"
22#include "gc.h"
23#include "iostat.h"
24#include <trace/events/f2fs.h>
25
26static struct kmem_cache *victim_entry_slab;
27
28static unsigned int count_bits(const unsigned long *addr,
29 unsigned int offset, unsigned int len);
30
31static int gc_thread_func(void *data)
32{
33 struct f2fs_sb_info *sbi = data;
34 struct f2fs_gc_kthread *gc_th = sbi->gc_thread;
35 wait_queue_head_t *wq = &sbi->gc_thread->gc_wait_queue_head;
36 wait_queue_head_t *fggc_wq = &sbi->gc_thread->fggc_wq;
37 unsigned int wait_ms;
38
39 wait_ms = gc_th->min_sleep_time;
40
41 set_freezable();
42 do {
43 bool sync_mode, foreground = false;
44
45 wait_event_interruptible_timeout(*wq,
46 kthread_should_stop() || freezing(current) ||
47 waitqueue_active(fggc_wq) ||
48 gc_th->gc_wake,
49 msecs_to_jiffies(wait_ms));
50
51 if (test_opt(sbi, GC_MERGE) && waitqueue_active(fggc_wq))
52 foreground = true;
53
54
55 if (gc_th->gc_wake)
56 gc_th->gc_wake = 0;
57
58 if (try_to_freeze()) {
59 stat_other_skip_bggc_count(sbi);
60 continue;
61 }
62 if (kthread_should_stop())
63 break;
64
65 if (sbi->sb->s_writers.frozen >= SB_FREEZE_WRITE) {
66 increase_sleep_time(gc_th, &wait_ms);
67 stat_other_skip_bggc_count(sbi);
68 continue;
69 }
70
71 if (time_to_inject(sbi, FAULT_CHECKPOINT)) {
72 f2fs_show_injection_info(sbi, FAULT_CHECKPOINT);
73 f2fs_stop_checkpoint(sbi, false);
74 }
75
76 if (!sb_start_write_trylock(sbi->sb)) {
77 stat_other_skip_bggc_count(sbi);
78 continue;
79 }
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94 if (sbi->gc_mode == GC_URGENT_HIGH) {
95 spin_lock(&sbi->gc_urgent_high_lock);
96 if (sbi->gc_urgent_high_limited) {
97 if (!sbi->gc_urgent_high_remaining) {
98 sbi->gc_urgent_high_limited = false;
99 spin_unlock(&sbi->gc_urgent_high_lock);
100 sbi->gc_mode = GC_NORMAL;
101 continue;
102 }
103 sbi->gc_urgent_high_remaining--;
104 }
105 spin_unlock(&sbi->gc_urgent_high_lock);
106 }
107
108 if (sbi->gc_mode == GC_URGENT_HIGH ||
109 sbi->gc_mode == GC_URGENT_MID) {
110 wait_ms = gc_th->urgent_sleep_time;
111 f2fs_down_write(&sbi->gc_lock);
112 goto do_gc;
113 }
114
115 if (foreground) {
116 f2fs_down_write(&sbi->gc_lock);
117 goto do_gc;
118 } else if (!f2fs_down_write_trylock(&sbi->gc_lock)) {
119 stat_other_skip_bggc_count(sbi);
120 goto next;
121 }
122
123 if (!is_idle(sbi, GC_TIME)) {
124 increase_sleep_time(gc_th, &wait_ms);
125 f2fs_up_write(&sbi->gc_lock);
126 stat_io_skip_bggc_count(sbi);
127 goto next;
128 }
129
130 if (has_enough_invalid_blocks(sbi))
131 decrease_sleep_time(gc_th, &wait_ms);
132 else
133 increase_sleep_time(gc_th, &wait_ms);
134do_gc:
135 if (!foreground)
136 stat_inc_bggc_count(sbi->stat_info);
137
138 sync_mode = F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_SYNC;
139
140
141 if (foreground)
142 sync_mode = false;
143
144
145 if (f2fs_gc(sbi, sync_mode, !foreground, false, NULL_SEGNO))
146 wait_ms = gc_th->no_gc_sleep_time;
147
148 if (foreground)
149 wake_up_all(&gc_th->fggc_wq);
150
151 trace_f2fs_background_gc(sbi->sb, wait_ms,
152 prefree_segments(sbi), free_segments(sbi));
153
154
155 f2fs_balance_fs_bg(sbi, true);
156next:
157 sb_end_write(sbi->sb);
158
159 } while (!kthread_should_stop());
160 return 0;
161}
162
163int f2fs_start_gc_thread(struct f2fs_sb_info *sbi)
164{
165 struct f2fs_gc_kthread *gc_th;
166 dev_t dev = sbi->sb->s_bdev->bd_dev;
167 int err = 0;
168
169 gc_th = f2fs_kmalloc(sbi, sizeof(struct f2fs_gc_kthread), GFP_KERNEL);
170 if (!gc_th) {
171 err = -ENOMEM;
172 goto out;
173 }
174
175 gc_th->urgent_sleep_time = DEF_GC_THREAD_URGENT_SLEEP_TIME;
176 gc_th->min_sleep_time = DEF_GC_THREAD_MIN_SLEEP_TIME;
177 gc_th->max_sleep_time = DEF_GC_THREAD_MAX_SLEEP_TIME;
178 gc_th->no_gc_sleep_time = DEF_GC_THREAD_NOGC_SLEEP_TIME;
179
180 gc_th->gc_wake = 0;
181
182 sbi->gc_thread = gc_th;
183 init_waitqueue_head(&sbi->gc_thread->gc_wait_queue_head);
184 init_waitqueue_head(&sbi->gc_thread->fggc_wq);
185 sbi->gc_thread->f2fs_gc_task = kthread_run(gc_thread_func, sbi,
186 "f2fs_gc-%u:%u", MAJOR(dev), MINOR(dev));
187 if (IS_ERR(gc_th->f2fs_gc_task)) {
188 err = PTR_ERR(gc_th->f2fs_gc_task);
189 kfree(gc_th);
190 sbi->gc_thread = NULL;
191 }
192out:
193 return err;
194}
195
196void f2fs_stop_gc_thread(struct f2fs_sb_info *sbi)
197{
198 struct f2fs_gc_kthread *gc_th = sbi->gc_thread;
199
200 if (!gc_th)
201 return;
202 kthread_stop(gc_th->f2fs_gc_task);
203 wake_up_all(&gc_th->fggc_wq);
204 kfree(gc_th);
205 sbi->gc_thread = NULL;
206}
207
208static int select_gc_type(struct f2fs_sb_info *sbi, int gc_type)
209{
210 int gc_mode;
211
212 if (gc_type == BG_GC) {
213 if (sbi->am.atgc_enabled)
214 gc_mode = GC_AT;
215 else
216 gc_mode = GC_CB;
217 } else {
218 gc_mode = GC_GREEDY;
219 }
220
221 switch (sbi->gc_mode) {
222 case GC_IDLE_CB:
223 gc_mode = GC_CB;
224 break;
225 case GC_IDLE_GREEDY:
226 case GC_URGENT_HIGH:
227 gc_mode = GC_GREEDY;
228 break;
229 case GC_IDLE_AT:
230 gc_mode = GC_AT;
231 break;
232 }
233
234 return gc_mode;
235}
236
237static void select_policy(struct f2fs_sb_info *sbi, int gc_type,
238 int type, struct victim_sel_policy *p)
239{
240 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
241
242 if (p->alloc_mode == SSR) {
243 p->gc_mode = GC_GREEDY;
244 p->dirty_bitmap = dirty_i->dirty_segmap[type];
245 p->max_search = dirty_i->nr_dirty[type];
246 p->ofs_unit = 1;
247 } else if (p->alloc_mode == AT_SSR) {
248 p->gc_mode = GC_GREEDY;
249 p->dirty_bitmap = dirty_i->dirty_segmap[type];
250 p->max_search = dirty_i->nr_dirty[type];
251 p->ofs_unit = 1;
252 } else {
253 p->gc_mode = select_gc_type(sbi, gc_type);
254 p->ofs_unit = sbi->segs_per_sec;
255 if (__is_large_section(sbi)) {
256 p->dirty_bitmap = dirty_i->dirty_secmap;
257 p->max_search = count_bits(p->dirty_bitmap,
258 0, MAIN_SECS(sbi));
259 } else {
260 p->dirty_bitmap = dirty_i->dirty_segmap[DIRTY];
261 p->max_search = dirty_i->nr_dirty[DIRTY];
262 }
263 }
264
265
266
267
268
269 if (gc_type != FG_GC &&
270 (sbi->gc_mode != GC_URGENT_HIGH) &&
271 (p->gc_mode != GC_AT && p->alloc_mode != AT_SSR) &&
272 p->max_search > sbi->max_victim_search)
273 p->max_search = sbi->max_victim_search;
274
275
276 if (f2fs_need_rand_seg(sbi))
277 p->offset = prandom_u32() % (MAIN_SECS(sbi) * sbi->segs_per_sec);
278 else if (test_opt(sbi, NOHEAP) &&
279 (type == CURSEG_HOT_DATA || IS_NODESEG(type)))
280 p->offset = 0;
281 else
282 p->offset = SIT_I(sbi)->last_victim[p->gc_mode];
283}
284
285static unsigned int get_max_cost(struct f2fs_sb_info *sbi,
286 struct victim_sel_policy *p)
287{
288
289 if (p->alloc_mode == SSR)
290 return sbi->blocks_per_seg;
291 else if (p->alloc_mode == AT_SSR)
292 return UINT_MAX;
293
294
295 if (p->gc_mode == GC_GREEDY)
296 return 2 * sbi->blocks_per_seg * p->ofs_unit;
297 else if (p->gc_mode == GC_CB)
298 return UINT_MAX;
299 else if (p->gc_mode == GC_AT)
300 return UINT_MAX;
301 else
302 return 0;
303}
304
305static unsigned int check_bg_victims(struct f2fs_sb_info *sbi)
306{
307 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
308 unsigned int secno;
309
310
311
312
313
314
315 for_each_set_bit(secno, dirty_i->victim_secmap, MAIN_SECS(sbi)) {
316 if (sec_usage_check(sbi, secno))
317 continue;
318 clear_bit(secno, dirty_i->victim_secmap);
319 return GET_SEG_FROM_SEC(sbi, secno);
320 }
321 return NULL_SEGNO;
322}
323
324static unsigned int get_cb_cost(struct f2fs_sb_info *sbi, unsigned int segno)
325{
326 struct sit_info *sit_i = SIT_I(sbi);
327 unsigned int secno = GET_SEC_FROM_SEG(sbi, segno);
328 unsigned int start = GET_SEG_FROM_SEC(sbi, secno);
329 unsigned long long mtime = 0;
330 unsigned int vblocks;
331 unsigned char age = 0;
332 unsigned char u;
333 unsigned int i;
334 unsigned int usable_segs_per_sec = f2fs_usable_segs_in_sec(sbi, segno);
335
336 for (i = 0; i < usable_segs_per_sec; i++)
337 mtime += get_seg_entry(sbi, start + i)->mtime;
338 vblocks = get_valid_blocks(sbi, segno, true);
339
340 mtime = div_u64(mtime, usable_segs_per_sec);
341 vblocks = div_u64(vblocks, usable_segs_per_sec);
342
343 u = (vblocks * 100) >> sbi->log_blocks_per_seg;
344
345
346 if (mtime < sit_i->min_mtime)
347 sit_i->min_mtime = mtime;
348 if (mtime > sit_i->max_mtime)
349 sit_i->max_mtime = mtime;
350 if (sit_i->max_mtime != sit_i->min_mtime)
351 age = 100 - div64_u64(100 * (mtime - sit_i->min_mtime),
352 sit_i->max_mtime - sit_i->min_mtime);
353
354 return UINT_MAX - ((100 * (100 - u) * age) / (100 + u));
355}
356
357static inline unsigned int get_gc_cost(struct f2fs_sb_info *sbi,
358 unsigned int segno, struct victim_sel_policy *p)
359{
360 if (p->alloc_mode == SSR)
361 return get_seg_entry(sbi, segno)->ckpt_valid_blocks;
362
363
364 if (p->gc_mode == GC_GREEDY)
365 return get_valid_blocks(sbi, segno, true);
366 else if (p->gc_mode == GC_CB)
367 return get_cb_cost(sbi, segno);
368
369 f2fs_bug_on(sbi, 1);
370 return 0;
371}
372
373static unsigned int count_bits(const unsigned long *addr,
374 unsigned int offset, unsigned int len)
375{
376 unsigned int end = offset + len, sum = 0;
377
378 while (offset < end) {
379 if (test_bit(offset++, addr))
380 ++sum;
381 }
382 return sum;
383}
384
385static struct victim_entry *attach_victim_entry(struct f2fs_sb_info *sbi,
386 unsigned long long mtime, unsigned int segno,
387 struct rb_node *parent, struct rb_node **p,
388 bool left_most)
389{
390 struct atgc_management *am = &sbi->am;
391 struct victim_entry *ve;
392
393 ve = f2fs_kmem_cache_alloc(victim_entry_slab,
394 GFP_NOFS, true, NULL);
395
396 ve->mtime = mtime;
397 ve->segno = segno;
398
399 rb_link_node(&ve->rb_node, parent, p);
400 rb_insert_color_cached(&ve->rb_node, &am->root, left_most);
401
402 list_add_tail(&ve->list, &am->victim_list);
403
404 am->victim_count++;
405
406 return ve;
407}
408
409static void insert_victim_entry(struct f2fs_sb_info *sbi,
410 unsigned long long mtime, unsigned int segno)
411{
412 struct atgc_management *am = &sbi->am;
413 struct rb_node **p;
414 struct rb_node *parent = NULL;
415 bool left_most = true;
416
417 p = f2fs_lookup_rb_tree_ext(sbi, &am->root, &parent, mtime, &left_most);
418 attach_victim_entry(sbi, mtime, segno, parent, p, left_most);
419}
420
421static void add_victim_entry(struct f2fs_sb_info *sbi,
422 struct victim_sel_policy *p, unsigned int segno)
423{
424 struct sit_info *sit_i = SIT_I(sbi);
425 unsigned int secno = GET_SEC_FROM_SEG(sbi, segno);
426 unsigned int start = GET_SEG_FROM_SEC(sbi, secno);
427 unsigned long long mtime = 0;
428 unsigned int i;
429
430 if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
431 if (p->gc_mode == GC_AT &&
432 get_valid_blocks(sbi, segno, true) == 0)
433 return;
434 }
435
436 for (i = 0; i < sbi->segs_per_sec; i++)
437 mtime += get_seg_entry(sbi, start + i)->mtime;
438 mtime = div_u64(mtime, sbi->segs_per_sec);
439
440
441 if (mtime < sit_i->min_mtime)
442 sit_i->min_mtime = mtime;
443 if (mtime > sit_i->max_mtime)
444 sit_i->max_mtime = mtime;
445 if (mtime < sit_i->dirty_min_mtime)
446 sit_i->dirty_min_mtime = mtime;
447 if (mtime > sit_i->dirty_max_mtime)
448 sit_i->dirty_max_mtime = mtime;
449
450
451 if (sit_i->dirty_max_mtime - mtime < p->age_threshold)
452 return;
453
454 insert_victim_entry(sbi, mtime, segno);
455}
456
457static struct rb_node *lookup_central_victim(struct f2fs_sb_info *sbi,
458 struct victim_sel_policy *p)
459{
460 struct atgc_management *am = &sbi->am;
461 struct rb_node *parent = NULL;
462 bool left_most;
463
464 f2fs_lookup_rb_tree_ext(sbi, &am->root, &parent, p->age, &left_most);
465
466 return parent;
467}
468
469static void atgc_lookup_victim(struct f2fs_sb_info *sbi,
470 struct victim_sel_policy *p)
471{
472 struct sit_info *sit_i = SIT_I(sbi);
473 struct atgc_management *am = &sbi->am;
474 struct rb_root_cached *root = &am->root;
475 struct rb_node *node;
476 struct rb_entry *re;
477 struct victim_entry *ve;
478 unsigned long long total_time;
479 unsigned long long age, u, accu;
480 unsigned long long max_mtime = sit_i->dirty_max_mtime;
481 unsigned long long min_mtime = sit_i->dirty_min_mtime;
482 unsigned int sec_blocks = BLKS_PER_SEC(sbi);
483 unsigned int vblocks;
484 unsigned int dirty_threshold = max(am->max_candidate_count,
485 am->candidate_ratio *
486 am->victim_count / 100);
487 unsigned int age_weight = am->age_weight;
488 unsigned int cost;
489 unsigned int iter = 0;
490
491 if (max_mtime < min_mtime)
492 return;
493
494 max_mtime += 1;
495 total_time = max_mtime - min_mtime;
496
497 accu = div64_u64(ULLONG_MAX, total_time);
498 accu = min_t(unsigned long long, div_u64(accu, 100),
499 DEFAULT_ACCURACY_CLASS);
500
501 node = rb_first_cached(root);
502next:
503 re = rb_entry_safe(node, struct rb_entry, rb_node);
504 if (!re)
505 return;
506
507 ve = (struct victim_entry *)re;
508
509 if (ve->mtime >= max_mtime || ve->mtime < min_mtime)
510 goto skip;
511
512
513 age = div64_u64(accu * (max_mtime - ve->mtime), total_time) *
514 age_weight;
515
516 vblocks = get_valid_blocks(sbi, ve->segno, true);
517 f2fs_bug_on(sbi, !vblocks || vblocks == sec_blocks);
518
519
520 u = div64_u64(accu * (sec_blocks - vblocks), sec_blocks) *
521 (100 - age_weight);
522
523 f2fs_bug_on(sbi, age + u >= UINT_MAX);
524
525 cost = UINT_MAX - (age + u);
526 iter++;
527
528 if (cost < p->min_cost ||
529 (cost == p->min_cost && age > p->oldest_age)) {
530 p->min_cost = cost;
531 p->oldest_age = age;
532 p->min_segno = ve->segno;
533 }
534skip:
535 if (iter < dirty_threshold) {
536 node = rb_next(node);
537 goto next;
538 }
539}
540
541
542
543
544
545static void atssr_lookup_victim(struct f2fs_sb_info *sbi,
546 struct victim_sel_policy *p)
547{
548 struct sit_info *sit_i = SIT_I(sbi);
549 struct atgc_management *am = &sbi->am;
550 struct rb_node *node;
551 struct rb_entry *re;
552 struct victim_entry *ve;
553 unsigned long long age;
554 unsigned long long max_mtime = sit_i->dirty_max_mtime;
555 unsigned long long min_mtime = sit_i->dirty_min_mtime;
556 unsigned int seg_blocks = sbi->blocks_per_seg;
557 unsigned int vblocks;
558 unsigned int dirty_threshold = max(am->max_candidate_count,
559 am->candidate_ratio *
560 am->victim_count / 100);
561 unsigned int cost;
562 unsigned int iter = 0;
563 int stage = 0;
564
565 if (max_mtime < min_mtime)
566 return;
567 max_mtime += 1;
568next_stage:
569 node = lookup_central_victim(sbi, p);
570next_node:
571 re = rb_entry_safe(node, struct rb_entry, rb_node);
572 if (!re) {
573 if (stage == 0)
574 goto skip_stage;
575 return;
576 }
577
578 ve = (struct victim_entry *)re;
579
580 if (ve->mtime >= max_mtime || ve->mtime < min_mtime)
581 goto skip_node;
582
583 age = max_mtime - ve->mtime;
584
585 vblocks = get_seg_entry(sbi, ve->segno)->ckpt_valid_blocks;
586 f2fs_bug_on(sbi, !vblocks);
587
588
589 if (vblocks == seg_blocks)
590 goto skip_node;
591
592 iter++;
593
594 age = max_mtime - abs(p->age - age);
595 cost = UINT_MAX - vblocks;
596
597 if (cost < p->min_cost ||
598 (cost == p->min_cost && age > p->oldest_age)) {
599 p->min_cost = cost;
600 p->oldest_age = age;
601 p->min_segno = ve->segno;
602 }
603skip_node:
604 if (iter < dirty_threshold) {
605 if (stage == 0)
606 node = rb_prev(node);
607 else if (stage == 1)
608 node = rb_next(node);
609 goto next_node;
610 }
611skip_stage:
612 if (stage < 1) {
613 stage++;
614 iter = 0;
615 goto next_stage;
616 }
617}
618static void lookup_victim_by_age(struct f2fs_sb_info *sbi,
619 struct victim_sel_policy *p)
620{
621 f2fs_bug_on(sbi, !f2fs_check_rb_tree_consistence(sbi,
622 &sbi->am.root, true));
623
624 if (p->gc_mode == GC_AT)
625 atgc_lookup_victim(sbi, p);
626 else if (p->alloc_mode == AT_SSR)
627 atssr_lookup_victim(sbi, p);
628 else
629 f2fs_bug_on(sbi, 1);
630}
631
632static void release_victim_entry(struct f2fs_sb_info *sbi)
633{
634 struct atgc_management *am = &sbi->am;
635 struct victim_entry *ve, *tmp;
636
637 list_for_each_entry_safe(ve, tmp, &am->victim_list, list) {
638 list_del(&ve->list);
639 kmem_cache_free(victim_entry_slab, ve);
640 am->victim_count--;
641 }
642
643 am->root = RB_ROOT_CACHED;
644
645 f2fs_bug_on(sbi, am->victim_count);
646 f2fs_bug_on(sbi, !list_empty(&am->victim_list));
647}
648
649
650
651
652
653
654
655
656
657static int get_victim_by_default(struct f2fs_sb_info *sbi,
658 unsigned int *result, int gc_type, int type,
659 char alloc_mode, unsigned long long age)
660{
661 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
662 struct sit_info *sm = SIT_I(sbi);
663 struct victim_sel_policy p;
664 unsigned int secno, last_victim;
665 unsigned int last_segment;
666 unsigned int nsearched;
667 bool is_atgc;
668 int ret = 0;
669
670 mutex_lock(&dirty_i->seglist_lock);
671 last_segment = MAIN_SECS(sbi) * sbi->segs_per_sec;
672
673 p.alloc_mode = alloc_mode;
674 p.age = age;
675 p.age_threshold = sbi->am.age_threshold;
676
677retry:
678 select_policy(sbi, gc_type, type, &p);
679 p.min_segno = NULL_SEGNO;
680 p.oldest_age = 0;
681 p.min_cost = get_max_cost(sbi, &p);
682
683 is_atgc = (p.gc_mode == GC_AT || p.alloc_mode == AT_SSR);
684 nsearched = 0;
685
686 if (is_atgc)
687 SIT_I(sbi)->dirty_min_mtime = ULLONG_MAX;
688
689 if (*result != NULL_SEGNO) {
690 if (!get_valid_blocks(sbi, *result, false)) {
691 ret = -ENODATA;
692 goto out;
693 }
694
695 if (sec_usage_check(sbi, GET_SEC_FROM_SEG(sbi, *result)))
696 ret = -EBUSY;
697 else
698 p.min_segno = *result;
699 goto out;
700 }
701
702 ret = -ENODATA;
703 if (p.max_search == 0)
704 goto out;
705
706 if (__is_large_section(sbi) && p.alloc_mode == LFS) {
707 if (sbi->next_victim_seg[BG_GC] != NULL_SEGNO) {
708 p.min_segno = sbi->next_victim_seg[BG_GC];
709 *result = p.min_segno;
710 sbi->next_victim_seg[BG_GC] = NULL_SEGNO;
711 goto got_result;
712 }
713 if (gc_type == FG_GC &&
714 sbi->next_victim_seg[FG_GC] != NULL_SEGNO) {
715 p.min_segno = sbi->next_victim_seg[FG_GC];
716 *result = p.min_segno;
717 sbi->next_victim_seg[FG_GC] = NULL_SEGNO;
718 goto got_result;
719 }
720 }
721
722 last_victim = sm->last_victim[p.gc_mode];
723 if (p.alloc_mode == LFS && gc_type == FG_GC) {
724 p.min_segno = check_bg_victims(sbi);
725 if (p.min_segno != NULL_SEGNO)
726 goto got_it;
727 }
728
729 while (1) {
730 unsigned long cost, *dirty_bitmap;
731 unsigned int unit_no, segno;
732
733 dirty_bitmap = p.dirty_bitmap;
734 unit_no = find_next_bit(dirty_bitmap,
735 last_segment / p.ofs_unit,
736 p.offset / p.ofs_unit);
737 segno = unit_no * p.ofs_unit;
738 if (segno >= last_segment) {
739 if (sm->last_victim[p.gc_mode]) {
740 last_segment =
741 sm->last_victim[p.gc_mode];
742 sm->last_victim[p.gc_mode] = 0;
743 p.offset = 0;
744 continue;
745 }
746 break;
747 }
748
749 p.offset = segno + p.ofs_unit;
750 nsearched++;
751
752#ifdef CONFIG_F2FS_CHECK_FS
753
754
755
756
757
758 if (test_bit(segno, sm->invalid_segmap))
759 goto next;
760#endif
761
762 secno = GET_SEC_FROM_SEG(sbi, segno);
763
764 if (sec_usage_check(sbi, secno))
765 goto next;
766
767
768 if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
769 if (p.alloc_mode == LFS) {
770
771
772
773
774 if (get_ckpt_valid_blocks(sbi, segno, true))
775 goto next;
776 } else {
777
778
779
780
781
782 if (!f2fs_segment_has_free_slot(sbi, segno))
783 goto next;
784 }
785 }
786
787 if (gc_type == BG_GC && test_bit(secno, dirty_i->victim_secmap))
788 goto next;
789
790 if (is_atgc) {
791 add_victim_entry(sbi, &p, segno);
792 goto next;
793 }
794
795 cost = get_gc_cost(sbi, segno, &p);
796
797 if (p.min_cost > cost) {
798 p.min_segno = segno;
799 p.min_cost = cost;
800 }
801next:
802 if (nsearched >= p.max_search) {
803 if (!sm->last_victim[p.gc_mode] && segno <= last_victim)
804 sm->last_victim[p.gc_mode] =
805 last_victim + p.ofs_unit;
806 else
807 sm->last_victim[p.gc_mode] = segno + p.ofs_unit;
808 sm->last_victim[p.gc_mode] %=
809 (MAIN_SECS(sbi) * sbi->segs_per_sec);
810 break;
811 }
812 }
813
814
815 if (is_atgc) {
816 lookup_victim_by_age(sbi, &p);
817 release_victim_entry(sbi);
818 }
819
820 if (is_atgc && p.min_segno == NULL_SEGNO &&
821 sm->elapsed_time < p.age_threshold) {
822 p.age_threshold = 0;
823 goto retry;
824 }
825
826 if (p.min_segno != NULL_SEGNO) {
827got_it:
828 *result = (p.min_segno / p.ofs_unit) * p.ofs_unit;
829got_result:
830 if (p.alloc_mode == LFS) {
831 secno = GET_SEC_FROM_SEG(sbi, p.min_segno);
832 if (gc_type == FG_GC)
833 sbi->cur_victim_sec = secno;
834 else
835 set_bit(secno, dirty_i->victim_secmap);
836 }
837 ret = 0;
838
839 }
840out:
841 if (p.min_segno != NULL_SEGNO)
842 trace_f2fs_get_victim(sbi->sb, type, gc_type, &p,
843 sbi->cur_victim_sec,
844 prefree_segments(sbi), free_segments(sbi));
845 mutex_unlock(&dirty_i->seglist_lock);
846
847 return ret;
848}
849
850static const struct victim_selection default_v_ops = {
851 .get_victim = get_victim_by_default,
852};
853
854static struct inode *find_gc_inode(struct gc_inode_list *gc_list, nid_t ino)
855{
856 struct inode_entry *ie;
857
858 ie = radix_tree_lookup(&gc_list->iroot, ino);
859 if (ie)
860 return ie->inode;
861 return NULL;
862}
863
864static void add_gc_inode(struct gc_inode_list *gc_list, struct inode *inode)
865{
866 struct inode_entry *new_ie;
867
868 if (inode == find_gc_inode(gc_list, inode->i_ino)) {
869 iput(inode);
870 return;
871 }
872 new_ie = f2fs_kmem_cache_alloc(f2fs_inode_entry_slab,
873 GFP_NOFS, true, NULL);
874 new_ie->inode = inode;
875
876 f2fs_radix_tree_insert(&gc_list->iroot, inode->i_ino, new_ie);
877 list_add_tail(&new_ie->list, &gc_list->ilist);
878}
879
880static void put_gc_inode(struct gc_inode_list *gc_list)
881{
882 struct inode_entry *ie, *next_ie;
883
884 list_for_each_entry_safe(ie, next_ie, &gc_list->ilist, list) {
885 radix_tree_delete(&gc_list->iroot, ie->inode->i_ino);
886 iput(ie->inode);
887 list_del(&ie->list);
888 kmem_cache_free(f2fs_inode_entry_slab, ie);
889 }
890}
891
892static int check_valid_map(struct f2fs_sb_info *sbi,
893 unsigned int segno, int offset)
894{
895 struct sit_info *sit_i = SIT_I(sbi);
896 struct seg_entry *sentry;
897 int ret;
898
899 down_read(&sit_i->sentry_lock);
900 sentry = get_seg_entry(sbi, segno);
901 ret = f2fs_test_bit(offset, sentry->cur_valid_map);
902 up_read(&sit_i->sentry_lock);
903 return ret;
904}
905
906
907
908
909
910
911static int gc_node_segment(struct f2fs_sb_info *sbi,
912 struct f2fs_summary *sum, unsigned int segno, int gc_type)
913{
914 struct f2fs_summary *entry;
915 block_t start_addr;
916 int off;
917 int phase = 0;
918 bool fggc = (gc_type == FG_GC);
919 int submitted = 0;
920 unsigned int usable_blks_in_seg = f2fs_usable_blks_in_seg(sbi, segno);
921
922 start_addr = START_BLOCK(sbi, segno);
923
924next_step:
925 entry = sum;
926
927 if (fggc && phase == 2)
928 atomic_inc(&sbi->wb_sync_req[NODE]);
929
930 for (off = 0; off < usable_blks_in_seg; off++, entry++) {
931 nid_t nid = le32_to_cpu(entry->nid);
932 struct page *node_page;
933 struct node_info ni;
934 int err;
935
936
937 if (gc_type == BG_GC && has_not_enough_free_secs(sbi, 0, 0))
938 return submitted;
939
940 if (check_valid_map(sbi, segno, off) == 0)
941 continue;
942
943 if (phase == 0) {
944 f2fs_ra_meta_pages(sbi, NAT_BLOCK_OFFSET(nid), 1,
945 META_NAT, true);
946 continue;
947 }
948
949 if (phase == 1) {
950 f2fs_ra_node_page(sbi, nid);
951 continue;
952 }
953
954
955 node_page = f2fs_get_node_page(sbi, nid);
956 if (IS_ERR(node_page))
957 continue;
958
959
960 if (check_valid_map(sbi, segno, off) == 0) {
961 f2fs_put_page(node_page, 1);
962 continue;
963 }
964
965 if (f2fs_get_node_info(sbi, nid, &ni, false)) {
966 f2fs_put_page(node_page, 1);
967 continue;
968 }
969
970 if (ni.blk_addr != start_addr + off) {
971 f2fs_put_page(node_page, 1);
972 continue;
973 }
974
975 err = f2fs_move_node_page(node_page, gc_type);
976 if (!err && gc_type == FG_GC)
977 submitted++;
978 stat_inc_node_blk_count(sbi, 1, gc_type);
979 }
980
981 if (++phase < 3)
982 goto next_step;
983
984 if (fggc)
985 atomic_dec(&sbi->wb_sync_req[NODE]);
986 return submitted;
987}
988
989
990
991
992
993
994
995
996block_t f2fs_start_bidx_of_node(unsigned int node_ofs, struct inode *inode)
997{
998 unsigned int indirect_blks = 2 * NIDS_PER_BLOCK + 4;
999 unsigned int bidx;
1000
1001 if (node_ofs == 0)
1002 return 0;
1003
1004 if (node_ofs <= 2) {
1005 bidx = node_ofs - 1;
1006 } else if (node_ofs <= indirect_blks) {
1007 int dec = (node_ofs - 4) / (NIDS_PER_BLOCK + 1);
1008
1009 bidx = node_ofs - 2 - dec;
1010 } else {
1011 int dec = (node_ofs - indirect_blks - 3) / (NIDS_PER_BLOCK + 1);
1012
1013 bidx = node_ofs - 5 - dec;
1014 }
1015 return bidx * ADDRS_PER_BLOCK(inode) + ADDRS_PER_INODE(inode);
1016}
1017
1018static bool is_alive(struct f2fs_sb_info *sbi, struct f2fs_summary *sum,
1019 struct node_info *dni, block_t blkaddr, unsigned int *nofs)
1020{
1021 struct page *node_page;
1022 nid_t nid;
1023 unsigned int ofs_in_node;
1024 block_t source_blkaddr;
1025
1026 nid = le32_to_cpu(sum->nid);
1027 ofs_in_node = le16_to_cpu(sum->ofs_in_node);
1028
1029 node_page = f2fs_get_node_page(sbi, nid);
1030 if (IS_ERR(node_page))
1031 return false;
1032
1033 if (f2fs_get_node_info(sbi, nid, dni, false)) {
1034 f2fs_put_page(node_page, 1);
1035 return false;
1036 }
1037
1038 if (sum->version != dni->version) {
1039 f2fs_warn(sbi, "%s: valid data with mismatched node version.",
1040 __func__);
1041 set_sbi_flag(sbi, SBI_NEED_FSCK);
1042 }
1043
1044 if (f2fs_check_nid_range(sbi, dni->ino)) {
1045 f2fs_put_page(node_page, 1);
1046 return false;
1047 }
1048
1049 *nofs = ofs_of_node(node_page);
1050 source_blkaddr = data_blkaddr(NULL, node_page, ofs_in_node);
1051 f2fs_put_page(node_page, 1);
1052
1053 if (source_blkaddr != blkaddr) {
1054#ifdef CONFIG_F2FS_CHECK_FS
1055 unsigned int segno = GET_SEGNO(sbi, blkaddr);
1056 unsigned long offset = GET_BLKOFF_FROM_SEG0(sbi, blkaddr);
1057
1058 if (unlikely(check_valid_map(sbi, segno, offset))) {
1059 if (!test_and_set_bit(segno, SIT_I(sbi)->invalid_segmap)) {
1060 f2fs_err(sbi, "mismatched blkaddr %u (source_blkaddr %u) in seg %u",
1061 blkaddr, source_blkaddr, segno);
1062 set_sbi_flag(sbi, SBI_NEED_FSCK);
1063 }
1064 }
1065#endif
1066 return false;
1067 }
1068 return true;
1069}
1070
1071static int ra_data_block(struct inode *inode, pgoff_t index)
1072{
1073 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1074 struct address_space *mapping = inode->i_mapping;
1075 struct dnode_of_data dn;
1076 struct page *page;
1077 struct extent_info ei = {0, 0, 0};
1078 struct f2fs_io_info fio = {
1079 .sbi = sbi,
1080 .ino = inode->i_ino,
1081 .type = DATA,
1082 .temp = COLD,
1083 .op = REQ_OP_READ,
1084 .op_flags = 0,
1085 .encrypted_page = NULL,
1086 .in_list = false,
1087 .retry = false,
1088 };
1089 int err;
1090
1091 page = f2fs_grab_cache_page(mapping, index, true);
1092 if (!page)
1093 return -ENOMEM;
1094
1095 if (f2fs_lookup_extent_cache(inode, index, &ei)) {
1096 dn.data_blkaddr = ei.blk + index - ei.fofs;
1097 if (unlikely(!f2fs_is_valid_blkaddr(sbi, dn.data_blkaddr,
1098 DATA_GENERIC_ENHANCE_READ))) {
1099 err = -EFSCORRUPTED;
1100 goto put_page;
1101 }
1102 goto got_it;
1103 }
1104
1105 set_new_dnode(&dn, inode, NULL, NULL, 0);
1106 err = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE);
1107 if (err)
1108 goto put_page;
1109 f2fs_put_dnode(&dn);
1110
1111 if (!__is_valid_data_blkaddr(dn.data_blkaddr)) {
1112 err = -ENOENT;
1113 goto put_page;
1114 }
1115 if (unlikely(!f2fs_is_valid_blkaddr(sbi, dn.data_blkaddr,
1116 DATA_GENERIC_ENHANCE))) {
1117 err = -EFSCORRUPTED;
1118 goto put_page;
1119 }
1120got_it:
1121
1122 fio.page = page;
1123 fio.new_blkaddr = fio.old_blkaddr = dn.data_blkaddr;
1124
1125
1126
1127
1128
1129 f2fs_wait_on_page_writeback(page, DATA, true, true);
1130
1131 f2fs_wait_on_block_writeback(inode, dn.data_blkaddr);
1132
1133 fio.encrypted_page = f2fs_pagecache_get_page(META_MAPPING(sbi),
1134 dn.data_blkaddr,
1135 FGP_LOCK | FGP_CREAT, GFP_NOFS);
1136 if (!fio.encrypted_page) {
1137 err = -ENOMEM;
1138 goto put_page;
1139 }
1140
1141 err = f2fs_submit_page_bio(&fio);
1142 if (err)
1143 goto put_encrypted_page;
1144 f2fs_put_page(fio.encrypted_page, 0);
1145 f2fs_put_page(page, 1);
1146
1147 f2fs_update_iostat(sbi, FS_DATA_READ_IO, F2FS_BLKSIZE);
1148 f2fs_update_iostat(sbi, FS_GDATA_READ_IO, F2FS_BLKSIZE);
1149
1150 return 0;
1151put_encrypted_page:
1152 f2fs_put_page(fio.encrypted_page, 1);
1153put_page:
1154 f2fs_put_page(page, 1);
1155 return err;
1156}
1157
1158
1159
1160
1161
1162static int move_data_block(struct inode *inode, block_t bidx,
1163 int gc_type, unsigned int segno, int off)
1164{
1165 struct f2fs_io_info fio = {
1166 .sbi = F2FS_I_SB(inode),
1167 .ino = inode->i_ino,
1168 .type = DATA,
1169 .temp = COLD,
1170 .op = REQ_OP_READ,
1171 .op_flags = 0,
1172 .encrypted_page = NULL,
1173 .in_list = false,
1174 .retry = false,
1175 };
1176 struct dnode_of_data dn;
1177 struct f2fs_summary sum;
1178 struct node_info ni;
1179 struct page *page, *mpage;
1180 block_t newaddr;
1181 int err = 0;
1182 bool lfs_mode = f2fs_lfs_mode(fio.sbi);
1183 int type = fio.sbi->am.atgc_enabled && (gc_type == BG_GC) &&
1184 (fio.sbi->gc_mode != GC_URGENT_HIGH) ?
1185 CURSEG_ALL_DATA_ATGC : CURSEG_COLD_DATA;
1186
1187
1188 page = f2fs_grab_cache_page(inode->i_mapping, bidx, false);
1189 if (!page)
1190 return -ENOMEM;
1191
1192 if (!check_valid_map(F2FS_I_SB(inode), segno, off)) {
1193 err = -ENOENT;
1194 goto out;
1195 }
1196
1197 if (f2fs_is_atomic_file(inode)) {
1198 F2FS_I(inode)->i_gc_failures[GC_FAILURE_ATOMIC]++;
1199 F2FS_I_SB(inode)->skipped_atomic_files[gc_type]++;
1200 err = -EAGAIN;
1201 goto out;
1202 }
1203
1204 if (f2fs_is_pinned_file(inode)) {
1205 f2fs_pin_file_control(inode, true);
1206 err = -EAGAIN;
1207 goto out;
1208 }
1209
1210 set_new_dnode(&dn, inode, NULL, NULL, 0);
1211 err = f2fs_get_dnode_of_data(&dn, bidx, LOOKUP_NODE);
1212 if (err)
1213 goto out;
1214
1215 if (unlikely(dn.data_blkaddr == NULL_ADDR)) {
1216 ClearPageUptodate(page);
1217 err = -ENOENT;
1218 goto put_out;
1219 }
1220
1221
1222
1223
1224
1225 f2fs_wait_on_page_writeback(page, DATA, true, true);
1226
1227 f2fs_wait_on_block_writeback(inode, dn.data_blkaddr);
1228
1229 err = f2fs_get_node_info(fio.sbi, dn.nid, &ni, false);
1230 if (err)
1231 goto put_out;
1232
1233
1234 fio.page = page;
1235 fio.new_blkaddr = fio.old_blkaddr = dn.data_blkaddr;
1236
1237 if (lfs_mode)
1238 f2fs_down_write(&fio.sbi->io_order_lock);
1239
1240 mpage = f2fs_grab_cache_page(META_MAPPING(fio.sbi),
1241 fio.old_blkaddr, false);
1242 if (!mpage) {
1243 err = -ENOMEM;
1244 goto up_out;
1245 }
1246
1247 fio.encrypted_page = mpage;
1248
1249
1250 if (!PageUptodate(mpage)) {
1251 err = f2fs_submit_page_bio(&fio);
1252 if (err) {
1253 f2fs_put_page(mpage, 1);
1254 goto up_out;
1255 }
1256
1257 f2fs_update_iostat(fio.sbi, FS_DATA_READ_IO, F2FS_BLKSIZE);
1258 f2fs_update_iostat(fio.sbi, FS_GDATA_READ_IO, F2FS_BLKSIZE);
1259
1260 lock_page(mpage);
1261 if (unlikely(mpage->mapping != META_MAPPING(fio.sbi) ||
1262 !PageUptodate(mpage))) {
1263 err = -EIO;
1264 f2fs_put_page(mpage, 1);
1265 goto up_out;
1266 }
1267 }
1268
1269 set_summary(&sum, dn.nid, dn.ofs_in_node, ni.version);
1270
1271
1272 f2fs_allocate_data_block(fio.sbi, NULL, fio.old_blkaddr, &newaddr,
1273 &sum, type, NULL);
1274
1275 fio.encrypted_page = f2fs_pagecache_get_page(META_MAPPING(fio.sbi),
1276 newaddr, FGP_LOCK | FGP_CREAT, GFP_NOFS);
1277 if (!fio.encrypted_page) {
1278 err = -ENOMEM;
1279 f2fs_put_page(mpage, 1);
1280 goto recover_block;
1281 }
1282
1283
1284 f2fs_wait_on_page_writeback(fio.encrypted_page, DATA, true, true);
1285 memcpy(page_address(fio.encrypted_page),
1286 page_address(mpage), PAGE_SIZE);
1287 f2fs_put_page(mpage, 1);
1288 invalidate_mapping_pages(META_MAPPING(fio.sbi),
1289 fio.old_blkaddr, fio.old_blkaddr);
1290 f2fs_invalidate_compress_page(fio.sbi, fio.old_blkaddr);
1291
1292 set_page_dirty(fio.encrypted_page);
1293 if (clear_page_dirty_for_io(fio.encrypted_page))
1294 dec_page_count(fio.sbi, F2FS_DIRTY_META);
1295
1296 set_page_writeback(fio.encrypted_page);
1297 ClearPageError(page);
1298
1299 fio.op = REQ_OP_WRITE;
1300 fio.op_flags = REQ_SYNC;
1301 fio.new_blkaddr = newaddr;
1302 f2fs_submit_page_write(&fio);
1303 if (fio.retry) {
1304 err = -EAGAIN;
1305 if (PageWriteback(fio.encrypted_page))
1306 end_page_writeback(fio.encrypted_page);
1307 goto put_page_out;
1308 }
1309
1310 f2fs_update_iostat(fio.sbi, FS_GC_DATA_IO, F2FS_BLKSIZE);
1311
1312 f2fs_update_data_blkaddr(&dn, newaddr);
1313 set_inode_flag(inode, FI_APPEND_WRITE);
1314 if (page->index == 0)
1315 set_inode_flag(inode, FI_FIRST_BLOCK_WRITTEN);
1316put_page_out:
1317 f2fs_put_page(fio.encrypted_page, 1);
1318recover_block:
1319 if (err)
1320 f2fs_do_replace_block(fio.sbi, &sum, newaddr, fio.old_blkaddr,
1321 true, true, true);
1322up_out:
1323 if (lfs_mode)
1324 f2fs_up_write(&fio.sbi->io_order_lock);
1325put_out:
1326 f2fs_put_dnode(&dn);
1327out:
1328 f2fs_put_page(page, 1);
1329 return err;
1330}
1331
1332static int move_data_page(struct inode *inode, block_t bidx, int gc_type,
1333 unsigned int segno, int off)
1334{
1335 struct page *page;
1336 int err = 0;
1337
1338 page = f2fs_get_lock_data_page(inode, bidx, true);
1339 if (IS_ERR(page))
1340 return PTR_ERR(page);
1341
1342 if (!check_valid_map(F2FS_I_SB(inode), segno, off)) {
1343 err = -ENOENT;
1344 goto out;
1345 }
1346
1347 if (f2fs_is_atomic_file(inode)) {
1348 F2FS_I(inode)->i_gc_failures[GC_FAILURE_ATOMIC]++;
1349 F2FS_I_SB(inode)->skipped_atomic_files[gc_type]++;
1350 err = -EAGAIN;
1351 goto out;
1352 }
1353 if (f2fs_is_pinned_file(inode)) {
1354 if (gc_type == FG_GC)
1355 f2fs_pin_file_control(inode, true);
1356 err = -EAGAIN;
1357 goto out;
1358 }
1359
1360 if (gc_type == BG_GC) {
1361 if (PageWriteback(page)) {
1362 err = -EAGAIN;
1363 goto out;
1364 }
1365 set_page_dirty(page);
1366 set_page_private_gcing(page);
1367 } else {
1368 struct f2fs_io_info fio = {
1369 .sbi = F2FS_I_SB(inode),
1370 .ino = inode->i_ino,
1371 .type = DATA,
1372 .temp = COLD,
1373 .op = REQ_OP_WRITE,
1374 .op_flags = REQ_SYNC,
1375 .old_blkaddr = NULL_ADDR,
1376 .page = page,
1377 .encrypted_page = NULL,
1378 .need_lock = LOCK_REQ,
1379 .io_type = FS_GC_DATA_IO,
1380 };
1381 bool is_dirty = PageDirty(page);
1382
1383retry:
1384 f2fs_wait_on_page_writeback(page, DATA, true, true);
1385
1386 set_page_dirty(page);
1387 if (clear_page_dirty_for_io(page)) {
1388 inode_dec_dirty_pages(inode);
1389 f2fs_remove_dirty_inode(inode);
1390 }
1391
1392 set_page_private_gcing(page);
1393
1394 err = f2fs_do_write_data_page(&fio);
1395 if (err) {
1396 clear_page_private_gcing(page);
1397 if (err == -ENOMEM) {
1398 memalloc_retry_wait(GFP_NOFS);
1399 goto retry;
1400 }
1401 if (is_dirty)
1402 set_page_dirty(page);
1403 }
1404 }
1405out:
1406 f2fs_put_page(page, 1);
1407 return err;
1408}
1409
1410
1411
1412
1413
1414
1415
1416
1417static int gc_data_segment(struct f2fs_sb_info *sbi, struct f2fs_summary *sum,
1418 struct gc_inode_list *gc_list, unsigned int segno, int gc_type,
1419 bool force_migrate)
1420{
1421 struct super_block *sb = sbi->sb;
1422 struct f2fs_summary *entry;
1423 block_t start_addr;
1424 int off;
1425 int phase = 0;
1426 int submitted = 0;
1427 unsigned int usable_blks_in_seg = f2fs_usable_blks_in_seg(sbi, segno);
1428
1429 start_addr = START_BLOCK(sbi, segno);
1430
1431next_step:
1432 entry = sum;
1433
1434 for (off = 0; off < usable_blks_in_seg; off++, entry++) {
1435 struct page *data_page;
1436 struct inode *inode;
1437 struct node_info dni;
1438 unsigned int ofs_in_node, nofs;
1439 block_t start_bidx;
1440 nid_t nid = le32_to_cpu(entry->nid);
1441
1442
1443
1444
1445
1446
1447 if ((gc_type == BG_GC && has_not_enough_free_secs(sbi, 0, 0)) ||
1448 (!force_migrate && get_valid_blocks(sbi, segno, true) ==
1449 BLKS_PER_SEC(sbi)))
1450 return submitted;
1451
1452 if (check_valid_map(sbi, segno, off) == 0)
1453 continue;
1454
1455 if (phase == 0) {
1456 f2fs_ra_meta_pages(sbi, NAT_BLOCK_OFFSET(nid), 1,
1457 META_NAT, true);
1458 continue;
1459 }
1460
1461 if (phase == 1) {
1462 f2fs_ra_node_page(sbi, nid);
1463 continue;
1464 }
1465
1466
1467 if (!is_alive(sbi, entry, &dni, start_addr + off, &nofs))
1468 continue;
1469
1470 if (phase == 2) {
1471 f2fs_ra_node_page(sbi, dni.ino);
1472 continue;
1473 }
1474
1475 ofs_in_node = le16_to_cpu(entry->ofs_in_node);
1476
1477 if (phase == 3) {
1478 inode = f2fs_iget(sb, dni.ino);
1479 if (IS_ERR(inode) || is_bad_inode(inode) ||
1480 special_file(inode->i_mode))
1481 continue;
1482
1483 if (!f2fs_down_write_trylock(
1484 &F2FS_I(inode)->i_gc_rwsem[WRITE])) {
1485 iput(inode);
1486 sbi->skipped_gc_rwsem++;
1487 continue;
1488 }
1489
1490 start_bidx = f2fs_start_bidx_of_node(nofs, inode) +
1491 ofs_in_node;
1492
1493 if (f2fs_post_read_required(inode)) {
1494 int err = ra_data_block(inode, start_bidx);
1495
1496 f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
1497 if (err) {
1498 iput(inode);
1499 continue;
1500 }
1501 add_gc_inode(gc_list, inode);
1502 continue;
1503 }
1504
1505 data_page = f2fs_get_read_data_page(inode,
1506 start_bidx, REQ_RAHEAD, true);
1507 f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
1508 if (IS_ERR(data_page)) {
1509 iput(inode);
1510 continue;
1511 }
1512
1513 f2fs_put_page(data_page, 0);
1514 add_gc_inode(gc_list, inode);
1515 continue;
1516 }
1517
1518
1519 inode = find_gc_inode(gc_list, dni.ino);
1520 if (inode) {
1521 struct f2fs_inode_info *fi = F2FS_I(inode);
1522 bool locked = false;
1523 int err;
1524
1525 if (S_ISREG(inode->i_mode)) {
1526 if (!f2fs_down_write_trylock(&fi->i_gc_rwsem[READ])) {
1527 sbi->skipped_gc_rwsem++;
1528 continue;
1529 }
1530 if (!f2fs_down_write_trylock(
1531 &fi->i_gc_rwsem[WRITE])) {
1532 sbi->skipped_gc_rwsem++;
1533 f2fs_up_write(&fi->i_gc_rwsem[READ]);
1534 continue;
1535 }
1536 locked = true;
1537
1538
1539 inode_dio_wait(inode);
1540 }
1541
1542 start_bidx = f2fs_start_bidx_of_node(nofs, inode)
1543 + ofs_in_node;
1544 if (f2fs_post_read_required(inode))
1545 err = move_data_block(inode, start_bidx,
1546 gc_type, segno, off);
1547 else
1548 err = move_data_page(inode, start_bidx, gc_type,
1549 segno, off);
1550
1551 if (!err && (gc_type == FG_GC ||
1552 f2fs_post_read_required(inode)))
1553 submitted++;
1554
1555 if (locked) {
1556 f2fs_up_write(&fi->i_gc_rwsem[WRITE]);
1557 f2fs_up_write(&fi->i_gc_rwsem[READ]);
1558 }
1559
1560 stat_inc_data_blk_count(sbi, 1, gc_type);
1561 }
1562 }
1563
1564 if (++phase < 5)
1565 goto next_step;
1566
1567 return submitted;
1568}
1569
1570static int __get_victim(struct f2fs_sb_info *sbi, unsigned int *victim,
1571 int gc_type)
1572{
1573 struct sit_info *sit_i = SIT_I(sbi);
1574 int ret;
1575
1576 down_write(&sit_i->sentry_lock);
1577 ret = DIRTY_I(sbi)->v_ops->get_victim(sbi, victim, gc_type,
1578 NO_CHECK_TYPE, LFS, 0);
1579 up_write(&sit_i->sentry_lock);
1580 return ret;
1581}
1582
1583static int do_garbage_collect(struct f2fs_sb_info *sbi,
1584 unsigned int start_segno,
1585 struct gc_inode_list *gc_list, int gc_type,
1586 bool force_migrate)
1587{
1588 struct page *sum_page;
1589 struct f2fs_summary_block *sum;
1590 struct blk_plug plug;
1591 unsigned int segno = start_segno;
1592 unsigned int end_segno = start_segno + sbi->segs_per_sec;
1593 int seg_freed = 0, migrated = 0;
1594 unsigned char type = IS_DATASEG(get_seg_entry(sbi, segno)->type) ?
1595 SUM_TYPE_DATA : SUM_TYPE_NODE;
1596 int submitted = 0;
1597
1598 if (__is_large_section(sbi))
1599 end_segno = rounddown(end_segno, sbi->segs_per_sec);
1600
1601
1602
1603
1604
1605
1606 if (f2fs_sb_has_blkzoned(sbi))
1607 end_segno -= sbi->segs_per_sec -
1608 f2fs_usable_segs_in_sec(sbi, segno);
1609
1610 sanity_check_seg_type(sbi, get_seg_entry(sbi, segno)->type);
1611
1612
1613 if (__is_large_section(sbi))
1614 f2fs_ra_meta_pages(sbi, GET_SUM_BLOCK(sbi, segno),
1615 end_segno - segno, META_SSA, true);
1616
1617
1618 while (segno < end_segno) {
1619 sum_page = f2fs_get_sum_page(sbi, segno++);
1620 if (IS_ERR(sum_page)) {
1621 int err = PTR_ERR(sum_page);
1622
1623 end_segno = segno - 1;
1624 for (segno = start_segno; segno < end_segno; segno++) {
1625 sum_page = find_get_page(META_MAPPING(sbi),
1626 GET_SUM_BLOCK(sbi, segno));
1627 f2fs_put_page(sum_page, 0);
1628 f2fs_put_page(sum_page, 0);
1629 }
1630 return err;
1631 }
1632 unlock_page(sum_page);
1633 }
1634
1635 blk_start_plug(&plug);
1636
1637 for (segno = start_segno; segno < end_segno; segno++) {
1638
1639
1640 sum_page = find_get_page(META_MAPPING(sbi),
1641 GET_SUM_BLOCK(sbi, segno));
1642 f2fs_put_page(sum_page, 0);
1643
1644 if (get_valid_blocks(sbi, segno, false) == 0)
1645 goto freed;
1646 if (gc_type == BG_GC && __is_large_section(sbi) &&
1647 migrated >= sbi->migration_granularity)
1648 goto skip;
1649 if (!PageUptodate(sum_page) || unlikely(f2fs_cp_error(sbi)))
1650 goto skip;
1651
1652 sum = page_address(sum_page);
1653 if (type != GET_SUM_TYPE((&sum->footer))) {
1654 f2fs_err(sbi, "Inconsistent segment (%u) type [%d, %d] in SSA and SIT",
1655 segno, type, GET_SUM_TYPE((&sum->footer)));
1656 set_sbi_flag(sbi, SBI_NEED_FSCK);
1657 f2fs_stop_checkpoint(sbi, false);
1658 goto skip;
1659 }
1660
1661
1662
1663
1664
1665
1666
1667
1668 if (type == SUM_TYPE_NODE)
1669 submitted += gc_node_segment(sbi, sum->entries, segno,
1670 gc_type);
1671 else
1672 submitted += gc_data_segment(sbi, sum->entries, gc_list,
1673 segno, gc_type,
1674 force_migrate);
1675
1676 stat_inc_seg_count(sbi, type, gc_type);
1677 sbi->gc_reclaimed_segs[sbi->gc_mode]++;
1678 migrated++;
1679
1680freed:
1681 if (gc_type == FG_GC &&
1682 get_valid_blocks(sbi, segno, false) == 0)
1683 seg_freed++;
1684
1685 if (__is_large_section(sbi) && segno + 1 < end_segno)
1686 sbi->next_victim_seg[gc_type] = segno + 1;
1687skip:
1688 f2fs_put_page(sum_page, 0);
1689 }
1690
1691 if (submitted)
1692 f2fs_submit_merged_write(sbi,
1693 (type == SUM_TYPE_NODE) ? NODE : DATA);
1694
1695 blk_finish_plug(&plug);
1696
1697 stat_inc_call_count(sbi->stat_info);
1698
1699 return seg_freed;
1700}
1701
1702int f2fs_gc(struct f2fs_sb_info *sbi, bool sync,
1703 bool background, bool force, unsigned int segno)
1704{
1705 int gc_type = sync ? FG_GC : BG_GC;
1706 int sec_freed = 0, seg_freed = 0, total_freed = 0;
1707 int ret = 0;
1708 struct cp_control cpc;
1709 unsigned int init_segno = segno;
1710 struct gc_inode_list gc_list = {
1711 .ilist = LIST_HEAD_INIT(gc_list.ilist),
1712 .iroot = RADIX_TREE_INIT(gc_list.iroot, GFP_NOFS),
1713 };
1714 unsigned long long last_skipped = sbi->skipped_atomic_files[FG_GC];
1715 unsigned long long first_skipped;
1716 unsigned int skipped_round = 0, round = 0;
1717
1718 trace_f2fs_gc_begin(sbi->sb, sync, background,
1719 get_pages(sbi, F2FS_DIRTY_NODES),
1720 get_pages(sbi, F2FS_DIRTY_DENTS),
1721 get_pages(sbi, F2FS_DIRTY_IMETA),
1722 free_sections(sbi),
1723 free_segments(sbi),
1724 reserved_segments(sbi),
1725 prefree_segments(sbi));
1726
1727 cpc.reason = __get_cp_reason(sbi);
1728 sbi->skipped_gc_rwsem = 0;
1729 first_skipped = last_skipped;
1730gc_more:
1731 if (unlikely(!(sbi->sb->s_flags & SB_ACTIVE))) {
1732 ret = -EINVAL;
1733 goto stop;
1734 }
1735 if (unlikely(f2fs_cp_error(sbi))) {
1736 ret = -EIO;
1737 goto stop;
1738 }
1739
1740 if (gc_type == BG_GC && has_not_enough_free_secs(sbi, 0, 0)) {
1741
1742
1743
1744
1745
1746 if (prefree_segments(sbi) &&
1747 !is_sbi_flag_set(sbi, SBI_CP_DISABLED)) {
1748 ret = f2fs_write_checkpoint(sbi, &cpc);
1749 if (ret)
1750 goto stop;
1751 }
1752 if (has_not_enough_free_secs(sbi, 0, 0))
1753 gc_type = FG_GC;
1754 }
1755
1756
1757 if (gc_type == BG_GC && !background) {
1758 ret = -EINVAL;
1759 goto stop;
1760 }
1761 ret = __get_victim(sbi, &segno, gc_type);
1762 if (ret)
1763 goto stop;
1764
1765 seg_freed = do_garbage_collect(sbi, segno, &gc_list, gc_type, force);
1766 if (gc_type == FG_GC &&
1767 seg_freed == f2fs_usable_segs_in_sec(sbi, segno))
1768 sec_freed++;
1769 total_freed += seg_freed;
1770
1771 if (gc_type == FG_GC) {
1772 if (sbi->skipped_atomic_files[FG_GC] > last_skipped ||
1773 sbi->skipped_gc_rwsem)
1774 skipped_round++;
1775 last_skipped = sbi->skipped_atomic_files[FG_GC];
1776 round++;
1777 }
1778
1779 if (gc_type == FG_GC)
1780 sbi->cur_victim_sec = NULL_SEGNO;
1781
1782 if (sync)
1783 goto stop;
1784
1785 if (has_not_enough_free_secs(sbi, sec_freed, 0)) {
1786 if (skipped_round <= MAX_SKIP_GC_COUNT ||
1787 skipped_round * 2 < round) {
1788 segno = NULL_SEGNO;
1789 goto gc_more;
1790 }
1791
1792 if (first_skipped < last_skipped &&
1793 (last_skipped - first_skipped) >
1794 sbi->skipped_gc_rwsem) {
1795 f2fs_drop_inmem_pages_all(sbi, true);
1796 segno = NULL_SEGNO;
1797 goto gc_more;
1798 }
1799 if (gc_type == FG_GC && !is_sbi_flag_set(sbi, SBI_CP_DISABLED))
1800 ret = f2fs_write_checkpoint(sbi, &cpc);
1801 }
1802stop:
1803 SIT_I(sbi)->last_victim[ALLOC_NEXT] = 0;
1804 SIT_I(sbi)->last_victim[FLUSH_DEVICE] = init_segno;
1805
1806 trace_f2fs_gc_end(sbi->sb, ret, total_freed, sec_freed,
1807 get_pages(sbi, F2FS_DIRTY_NODES),
1808 get_pages(sbi, F2FS_DIRTY_DENTS),
1809 get_pages(sbi, F2FS_DIRTY_IMETA),
1810 free_sections(sbi),
1811 free_segments(sbi),
1812 reserved_segments(sbi),
1813 prefree_segments(sbi));
1814
1815 f2fs_up_write(&sbi->gc_lock);
1816
1817 put_gc_inode(&gc_list);
1818
1819 if (sync && !ret)
1820 ret = sec_freed ? 0 : -EAGAIN;
1821 return ret;
1822}
1823
1824int __init f2fs_create_garbage_collection_cache(void)
1825{
1826 victim_entry_slab = f2fs_kmem_cache_create("f2fs_victim_entry",
1827 sizeof(struct victim_entry));
1828 if (!victim_entry_slab)
1829 return -ENOMEM;
1830 return 0;
1831}
1832
1833void f2fs_destroy_garbage_collection_cache(void)
1834{
1835 kmem_cache_destroy(victim_entry_slab);
1836}
1837
1838static void init_atgc_management(struct f2fs_sb_info *sbi)
1839{
1840 struct atgc_management *am = &sbi->am;
1841
1842 if (test_opt(sbi, ATGC) &&
1843 SIT_I(sbi)->elapsed_time >= DEF_GC_THREAD_AGE_THRESHOLD)
1844 am->atgc_enabled = true;
1845
1846 am->root = RB_ROOT_CACHED;
1847 INIT_LIST_HEAD(&am->victim_list);
1848 am->victim_count = 0;
1849
1850 am->candidate_ratio = DEF_GC_THREAD_CANDIDATE_RATIO;
1851 am->max_candidate_count = DEF_GC_THREAD_MAX_CANDIDATE_COUNT;
1852 am->age_weight = DEF_GC_THREAD_AGE_WEIGHT;
1853 am->age_threshold = DEF_GC_THREAD_AGE_THRESHOLD;
1854}
1855
1856void f2fs_build_gc_manager(struct f2fs_sb_info *sbi)
1857{
1858 DIRTY_I(sbi)->v_ops = &default_v_ops;
1859
1860 sbi->gc_pin_file_threshold = DEF_GC_FAILED_PINNED_FILES;
1861
1862
1863 if (f2fs_is_multi_device(sbi) && !__is_large_section(sbi))
1864 SIT_I(sbi)->last_victim[ALLOC_NEXT] =
1865 GET_SEGNO(sbi, FDEV(0).end_blk) + 1;
1866
1867 init_atgc_management(sbi);
1868}
1869
1870static int free_segment_range(struct f2fs_sb_info *sbi,
1871 unsigned int secs, bool gc_only)
1872{
1873 unsigned int segno, next_inuse, start, end;
1874 struct cp_control cpc = { CP_RESIZE, 0, 0, 0 };
1875 int gc_mode, gc_type;
1876 int err = 0;
1877 int type;
1878
1879
1880 MAIN_SECS(sbi) -= secs;
1881 start = MAIN_SECS(sbi) * sbi->segs_per_sec;
1882 end = MAIN_SEGS(sbi) - 1;
1883
1884 mutex_lock(&DIRTY_I(sbi)->seglist_lock);
1885 for (gc_mode = 0; gc_mode < MAX_GC_POLICY; gc_mode++)
1886 if (SIT_I(sbi)->last_victim[gc_mode] >= start)
1887 SIT_I(sbi)->last_victim[gc_mode] = 0;
1888
1889 for (gc_type = BG_GC; gc_type <= FG_GC; gc_type++)
1890 if (sbi->next_victim_seg[gc_type] >= start)
1891 sbi->next_victim_seg[gc_type] = NULL_SEGNO;
1892 mutex_unlock(&DIRTY_I(sbi)->seglist_lock);
1893
1894
1895 for (type = CURSEG_HOT_DATA; type < NR_CURSEG_PERSIST_TYPE; type++)
1896 f2fs_allocate_segment_for_resize(sbi, type, start, end);
1897
1898
1899 for (segno = start; segno <= end; segno += sbi->segs_per_sec) {
1900 struct gc_inode_list gc_list = {
1901 .ilist = LIST_HEAD_INIT(gc_list.ilist),
1902 .iroot = RADIX_TREE_INIT(gc_list.iroot, GFP_NOFS),
1903 };
1904
1905 do_garbage_collect(sbi, segno, &gc_list, FG_GC, true);
1906 put_gc_inode(&gc_list);
1907
1908 if (!gc_only && get_valid_blocks(sbi, segno, true)) {
1909 err = -EAGAIN;
1910 goto out;
1911 }
1912 if (fatal_signal_pending(current)) {
1913 err = -ERESTARTSYS;
1914 goto out;
1915 }
1916 }
1917 if (gc_only)
1918 goto out;
1919
1920 err = f2fs_write_checkpoint(sbi, &cpc);
1921 if (err)
1922 goto out;
1923
1924 next_inuse = find_next_inuse(FREE_I(sbi), end + 1, start);
1925 if (next_inuse <= end) {
1926 f2fs_err(sbi, "segno %u should be free but still inuse!",
1927 next_inuse);
1928 f2fs_bug_on(sbi, 1);
1929 }
1930out:
1931 MAIN_SECS(sbi) += secs;
1932 return err;
1933}
1934
1935static void update_sb_metadata(struct f2fs_sb_info *sbi, int secs)
1936{
1937 struct f2fs_super_block *raw_sb = F2FS_RAW_SUPER(sbi);
1938 int section_count;
1939 int segment_count;
1940 int segment_count_main;
1941 long long block_count;
1942 int segs = secs * sbi->segs_per_sec;
1943
1944 f2fs_down_write(&sbi->sb_lock);
1945
1946 section_count = le32_to_cpu(raw_sb->section_count);
1947 segment_count = le32_to_cpu(raw_sb->segment_count);
1948 segment_count_main = le32_to_cpu(raw_sb->segment_count_main);
1949 block_count = le64_to_cpu(raw_sb->block_count);
1950
1951 raw_sb->section_count = cpu_to_le32(section_count + secs);
1952 raw_sb->segment_count = cpu_to_le32(segment_count + segs);
1953 raw_sb->segment_count_main = cpu_to_le32(segment_count_main + segs);
1954 raw_sb->block_count = cpu_to_le64(block_count +
1955 (long long)segs * sbi->blocks_per_seg);
1956 if (f2fs_is_multi_device(sbi)) {
1957 int last_dev = sbi->s_ndevs - 1;
1958 int dev_segs =
1959 le32_to_cpu(raw_sb->devs[last_dev].total_segments);
1960
1961 raw_sb->devs[last_dev].total_segments =
1962 cpu_to_le32(dev_segs + segs);
1963 }
1964
1965 f2fs_up_write(&sbi->sb_lock);
1966}
1967
1968static void update_fs_metadata(struct f2fs_sb_info *sbi, int secs)
1969{
1970 int segs = secs * sbi->segs_per_sec;
1971 long long blks = (long long)segs * sbi->blocks_per_seg;
1972 long long user_block_count =
1973 le64_to_cpu(F2FS_CKPT(sbi)->user_block_count);
1974
1975 SM_I(sbi)->segment_count = (int)SM_I(sbi)->segment_count + segs;
1976 MAIN_SEGS(sbi) = (int)MAIN_SEGS(sbi) + segs;
1977 MAIN_SECS(sbi) += secs;
1978 FREE_I(sbi)->free_sections = (int)FREE_I(sbi)->free_sections + secs;
1979 FREE_I(sbi)->free_segments = (int)FREE_I(sbi)->free_segments + segs;
1980 F2FS_CKPT(sbi)->user_block_count = cpu_to_le64(user_block_count + blks);
1981
1982 if (f2fs_is_multi_device(sbi)) {
1983 int last_dev = sbi->s_ndevs - 1;
1984
1985 FDEV(last_dev).total_segments =
1986 (int)FDEV(last_dev).total_segments + segs;
1987 FDEV(last_dev).end_blk =
1988 (long long)FDEV(last_dev).end_blk + blks;
1989#ifdef CONFIG_BLK_DEV_ZONED
1990 FDEV(last_dev).nr_blkz = (int)FDEV(last_dev).nr_blkz +
1991 (int)(blks >> sbi->log_blocks_per_blkz);
1992#endif
1993 }
1994}
1995
1996int f2fs_resize_fs(struct f2fs_sb_info *sbi, __u64 block_count)
1997{
1998 __u64 old_block_count, shrunk_blocks;
1999 struct cp_control cpc = { CP_RESIZE, 0, 0, 0 };
2000 unsigned int secs;
2001 int err = 0;
2002 __u32 rem;
2003
2004 old_block_count = le64_to_cpu(F2FS_RAW_SUPER(sbi)->block_count);
2005 if (block_count > old_block_count)
2006 return -EINVAL;
2007
2008 if (f2fs_is_multi_device(sbi)) {
2009 int last_dev = sbi->s_ndevs - 1;
2010 __u64 last_segs = FDEV(last_dev).total_segments;
2011
2012 if (block_count + last_segs * sbi->blocks_per_seg <=
2013 old_block_count)
2014 return -EINVAL;
2015 }
2016
2017
2018 div_u64_rem(block_count, BLKS_PER_SEC(sbi), &rem);
2019 if (rem)
2020 return -EINVAL;
2021
2022 if (block_count == old_block_count)
2023 return 0;
2024
2025 if (is_sbi_flag_set(sbi, SBI_NEED_FSCK)) {
2026 f2fs_err(sbi, "Should run fsck to repair first.");
2027 return -EFSCORRUPTED;
2028 }
2029
2030 if (test_opt(sbi, DISABLE_CHECKPOINT)) {
2031 f2fs_err(sbi, "Checkpoint should be enabled.");
2032 return -EINVAL;
2033 }
2034
2035 shrunk_blocks = old_block_count - block_count;
2036 secs = div_u64(shrunk_blocks, BLKS_PER_SEC(sbi));
2037
2038
2039 if (!f2fs_down_write_trylock(&sbi->gc_lock))
2040 return -EAGAIN;
2041
2042
2043 f2fs_lock_op(sbi);
2044
2045 spin_lock(&sbi->stat_lock);
2046 if (shrunk_blocks + valid_user_blocks(sbi) +
2047 sbi->current_reserved_blocks + sbi->unusable_block_count +
2048 F2FS_OPTION(sbi).root_reserved_blocks > sbi->user_block_count)
2049 err = -ENOSPC;
2050 spin_unlock(&sbi->stat_lock);
2051
2052 if (err)
2053 goto out_unlock;
2054
2055 err = free_segment_range(sbi, secs, true);
2056
2057out_unlock:
2058 f2fs_unlock_op(sbi);
2059 f2fs_up_write(&sbi->gc_lock);
2060 if (err)
2061 return err;
2062
2063 set_sbi_flag(sbi, SBI_IS_RESIZEFS);
2064
2065 freeze_super(sbi->sb);
2066 f2fs_down_write(&sbi->gc_lock);
2067 f2fs_down_write(&sbi->cp_global_sem);
2068
2069 spin_lock(&sbi->stat_lock);
2070 if (shrunk_blocks + valid_user_blocks(sbi) +
2071 sbi->current_reserved_blocks + sbi->unusable_block_count +
2072 F2FS_OPTION(sbi).root_reserved_blocks > sbi->user_block_count)
2073 err = -ENOSPC;
2074 else
2075 sbi->user_block_count -= shrunk_blocks;
2076 spin_unlock(&sbi->stat_lock);
2077 if (err)
2078 goto out_err;
2079
2080 err = free_segment_range(sbi, secs, false);
2081 if (err)
2082 goto recover_out;
2083
2084 update_sb_metadata(sbi, -secs);
2085
2086 err = f2fs_commit_super(sbi, false);
2087 if (err) {
2088 update_sb_metadata(sbi, secs);
2089 goto recover_out;
2090 }
2091
2092 update_fs_metadata(sbi, -secs);
2093 clear_sbi_flag(sbi, SBI_IS_RESIZEFS);
2094 set_sbi_flag(sbi, SBI_IS_DIRTY);
2095
2096 err = f2fs_write_checkpoint(sbi, &cpc);
2097 if (err) {
2098 update_fs_metadata(sbi, secs);
2099 update_sb_metadata(sbi, secs);
2100 f2fs_commit_super(sbi, false);
2101 }
2102recover_out:
2103 if (err) {
2104 set_sbi_flag(sbi, SBI_NEED_FSCK);
2105 f2fs_err(sbi, "resize_fs failed, should run fsck to repair!");
2106
2107 spin_lock(&sbi->stat_lock);
2108 sbi->user_block_count += shrunk_blocks;
2109 spin_unlock(&sbi->stat_lock);
2110 }
2111out_err:
2112 f2fs_up_write(&sbi->cp_global_sem);
2113 f2fs_up_write(&sbi->gc_lock);
2114 thaw_super(sbi->sb);
2115 clear_sbi_flag(sbi, SBI_IS_RESIZEFS);
2116 return err;
2117}
2118
