4 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
5 * http://www.samsung.com/
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
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>
21 #include <trace/events/f2fs.h>
24 * This function balances dirty node and dentry pages.
25 * In addition, it controls garbage collection.
27 void f2fs_balance_fs(struct f2fs_sb_info *sbi)
30 * We should do GC or end up with checkpoint, if there are so many dirty
31 * dir/node pages without enough free segments.
33 if (has_not_enough_free_secs(sbi, 0)) {
34 mutex_lock(&sbi->gc_mutex);
39 static void __locate_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno,
40 enum dirty_type dirty_type)
42 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
44 /* need not be added */
45 if (IS_CURSEG(sbi, segno))
48 if (!test_and_set_bit(segno, dirty_i->dirty_segmap[dirty_type]))
49 dirty_i->nr_dirty[dirty_type]++;
51 if (dirty_type == DIRTY) {
52 struct seg_entry *sentry = get_seg_entry(sbi, segno);
53 enum dirty_type t = DIRTY_HOT_DATA;
55 dirty_type = sentry->type;
57 if (!test_and_set_bit(segno, dirty_i->dirty_segmap[dirty_type]))
58 dirty_i->nr_dirty[dirty_type]++;
60 /* Only one bitmap should be set */
61 for (; t <= DIRTY_COLD_NODE; t++) {
64 if (test_and_clear_bit(segno, dirty_i->dirty_segmap[t]))
65 dirty_i->nr_dirty[t]--;
70 static void __remove_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno,
71 enum dirty_type dirty_type)
73 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
75 if (test_and_clear_bit(segno, dirty_i->dirty_segmap[dirty_type]))
76 dirty_i->nr_dirty[dirty_type]--;
78 if (dirty_type == DIRTY) {
79 enum dirty_type t = DIRTY_HOT_DATA;
81 /* clear its dirty bitmap */
82 for (; t <= DIRTY_COLD_NODE; t++) {
83 if (test_and_clear_bit(segno,
84 dirty_i->dirty_segmap[t])) {
85 dirty_i->nr_dirty[t]--;
90 if (get_valid_blocks(sbi, segno, sbi->segs_per_sec) == 0)
91 clear_bit(GET_SECNO(sbi, segno),
92 dirty_i->victim_secmap);
97 * Should not occur error such as -ENOMEM.
98 * Adding dirty entry into seglist is not critical operation.
99 * If a given segment is one of current working segments, it won't be added.
101 static void locate_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno)
103 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
104 unsigned short valid_blocks;
106 if (segno == NULL_SEGNO || IS_CURSEG(sbi, segno))
109 mutex_lock(&dirty_i->seglist_lock);
111 valid_blocks = get_valid_blocks(sbi, segno, 0);
113 if (valid_blocks == 0) {
114 __locate_dirty_segment(sbi, segno, PRE);
115 __remove_dirty_segment(sbi, segno, DIRTY);
116 } else if (valid_blocks < sbi->blocks_per_seg) {
117 __locate_dirty_segment(sbi, segno, DIRTY);
119 /* Recovery routine with SSR needs this */
120 __remove_dirty_segment(sbi, segno, DIRTY);
123 mutex_unlock(&dirty_i->seglist_lock);
127 * Should call clear_prefree_segments after checkpoint is done.
129 static void set_prefree_as_free_segments(struct f2fs_sb_info *sbi)
131 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
132 unsigned int segno = -1;
133 unsigned int total_segs = TOTAL_SEGS(sbi);
135 mutex_lock(&dirty_i->seglist_lock);
137 segno = find_next_bit(dirty_i->dirty_segmap[PRE], total_segs,
139 if (segno >= total_segs)
141 __set_test_and_free(sbi, segno);
143 mutex_unlock(&dirty_i->seglist_lock);
146 void clear_prefree_segments(struct f2fs_sb_info *sbi)
148 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
149 unsigned int segno = -1;
150 unsigned int total_segs = TOTAL_SEGS(sbi);
152 mutex_lock(&dirty_i->seglist_lock);
154 segno = find_next_bit(dirty_i->dirty_segmap[PRE], total_segs,
156 if (segno >= total_segs)
159 if (test_and_clear_bit(segno, dirty_i->dirty_segmap[PRE]))
160 dirty_i->nr_dirty[PRE]--;
163 if (test_opt(sbi, DISCARD))
164 blkdev_issue_discard(sbi->sb->s_bdev,
165 START_BLOCK(sbi, segno) <<
166 sbi->log_sectors_per_block,
167 1 << (sbi->log_sectors_per_block +
168 sbi->log_blocks_per_seg),
171 mutex_unlock(&dirty_i->seglist_lock);
174 static void __mark_sit_entry_dirty(struct f2fs_sb_info *sbi, unsigned int segno)
176 struct sit_info *sit_i = SIT_I(sbi);
177 if (!__test_and_set_bit(segno, sit_i->dirty_sentries_bitmap))
178 sit_i->dirty_sentries++;
181 static void __set_sit_entry_type(struct f2fs_sb_info *sbi, int type,
182 unsigned int segno, int modified)
184 struct seg_entry *se = get_seg_entry(sbi, segno);
187 __mark_sit_entry_dirty(sbi, segno);
190 static void update_sit_entry(struct f2fs_sb_info *sbi, block_t blkaddr, int del)
192 struct seg_entry *se;
193 unsigned int segno, offset;
194 long int new_vblocks;
196 segno = GET_SEGNO(sbi, blkaddr);
198 se = get_seg_entry(sbi, segno);
199 new_vblocks = se->valid_blocks + del;
200 offset = GET_SEGOFF_FROM_SEG0(sbi, blkaddr) & (sbi->blocks_per_seg - 1);
202 BUG_ON((new_vblocks >> (sizeof(unsigned short) << 3) ||
203 (new_vblocks > sbi->blocks_per_seg)));
205 se->valid_blocks = new_vblocks;
206 se->mtime = get_mtime(sbi);
207 SIT_I(sbi)->max_mtime = se->mtime;
209 /* Update valid block bitmap */
211 if (f2fs_set_bit(offset, se->cur_valid_map))
214 if (!f2fs_clear_bit(offset, se->cur_valid_map))
217 if (!f2fs_test_bit(offset, se->ckpt_valid_map))
218 se->ckpt_valid_blocks += del;
220 __mark_sit_entry_dirty(sbi, segno);
222 /* update total number of valid blocks to be written in ckpt area */
223 SIT_I(sbi)->written_valid_blocks += del;
225 if (sbi->segs_per_sec > 1)
226 get_sec_entry(sbi, segno)->valid_blocks += del;
229 static void refresh_sit_entry(struct f2fs_sb_info *sbi,
230 block_t old_blkaddr, block_t new_blkaddr)
232 update_sit_entry(sbi, new_blkaddr, 1);
233 if (GET_SEGNO(sbi, old_blkaddr) != NULL_SEGNO)
234 update_sit_entry(sbi, old_blkaddr, -1);
237 void invalidate_blocks(struct f2fs_sb_info *sbi, block_t addr)
239 unsigned int segno = GET_SEGNO(sbi, addr);
240 struct sit_info *sit_i = SIT_I(sbi);
242 BUG_ON(addr == NULL_ADDR);
243 if (addr == NEW_ADDR)
246 /* add it into sit main buffer */
247 mutex_lock(&sit_i->sentry_lock);
249 update_sit_entry(sbi, addr, -1);
251 /* add it into dirty seglist */
252 locate_dirty_segment(sbi, segno);
254 mutex_unlock(&sit_i->sentry_lock);
258 * This function should be resided under the curseg_mutex lock
260 static void __add_sum_entry(struct f2fs_sb_info *sbi, int type,
261 struct f2fs_summary *sum)
263 struct curseg_info *curseg = CURSEG_I(sbi, type);
264 void *addr = curseg->sum_blk;
265 addr += curseg->next_blkoff * sizeof(struct f2fs_summary);
266 memcpy(addr, sum, sizeof(struct f2fs_summary));
270 * Calculate the number of current summary pages for writing
272 int npages_for_summary_flush(struct f2fs_sb_info *sbi)
274 int total_size_bytes = 0;
275 int valid_sum_count = 0;
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;
282 valid_sum_count += curseg_blkoff(sbi, i);
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)
291 else if (total_size_bytes < 2 * sum_space)
297 * Caller should put this summary page
299 struct page *get_sum_page(struct f2fs_sb_info *sbi, unsigned int segno)
301 return get_meta_page(sbi, GET_SUM_BLOCK(sbi, segno));
304 static void write_sum_page(struct f2fs_sb_info *sbi,
305 struct f2fs_summary_block *sum_blk, block_t blk_addr)
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);
314 static int is_next_segment_free(struct f2fs_sb_info *sbi, int type)
316 struct curseg_info *curseg = CURSEG_I(sbi, type);
317 unsigned int segno = curseg->segno + 1;
318 struct free_segmap_info *free_i = FREE_I(sbi);
320 if (segno < TOTAL_SEGS(sbi) && segno % sbi->segs_per_sec)
321 return !test_bit(segno, free_i->free_segmap);
326 * Find a new segment from the free segments bitmap to right order
327 * This function should be returned with success, otherwise BUG
329 static void get_new_segment(struct f2fs_sb_info *sbi,
330 unsigned int *newseg, bool new_sec, int dir)
332 struct free_segmap_info *free_i = FREE_I(sbi);
333 unsigned int segno, secno, zoneno;
334 unsigned int total_zones = TOTAL_SECS(sbi) / sbi->secs_per_zone;
335 unsigned int hint = *newseg / sbi->segs_per_sec;
336 unsigned int old_zoneno = GET_ZONENO_FROM_SEGNO(sbi, *newseg);
337 unsigned int left_start = hint;
342 write_lock(&free_i->segmap_lock);
344 if (!new_sec && ((*newseg + 1) % sbi->segs_per_sec)) {
345 segno = find_next_zero_bit(free_i->free_segmap,
346 TOTAL_SEGS(sbi), *newseg + 1);
347 if (segno - *newseg < sbi->segs_per_sec -
348 (*newseg % sbi->segs_per_sec))
352 secno = find_next_zero_bit(free_i->free_secmap, TOTAL_SECS(sbi), hint);
353 if (secno >= TOTAL_SECS(sbi)) {
354 if (dir == ALLOC_RIGHT) {
355 secno = find_next_zero_bit(free_i->free_secmap,
357 BUG_ON(secno >= TOTAL_SECS(sbi));
360 left_start = hint - 1;
366 while (test_bit(left_start, free_i->free_secmap)) {
367 if (left_start > 0) {
371 left_start = find_next_zero_bit(free_i->free_secmap,
373 BUG_ON(left_start >= TOTAL_SECS(sbi));
379 segno = secno * sbi->segs_per_sec;
380 zoneno = secno / sbi->secs_per_zone;
382 /* give up on finding another zone */
385 if (sbi->secs_per_zone == 1)
387 if (zoneno == old_zoneno)
389 if (dir == ALLOC_LEFT) {
390 if (!go_left && zoneno + 1 >= total_zones)
392 if (go_left && zoneno == 0)
395 for (i = 0; i < NR_CURSEG_TYPE; i++)
396 if (CURSEG_I(sbi, i)->zone == zoneno)
399 if (i < NR_CURSEG_TYPE) {
400 /* zone is in user, try another */
402 hint = zoneno * sbi->secs_per_zone - 1;
403 else if (zoneno + 1 >= total_zones)
406 hint = (zoneno + 1) * sbi->secs_per_zone;
408 goto find_other_zone;
411 /* set it as dirty segment in free segmap */
412 BUG_ON(test_bit(segno, free_i->free_segmap));
413 __set_inuse(sbi, segno);
415 write_unlock(&free_i->segmap_lock);
418 static void reset_curseg(struct f2fs_sb_info *sbi, int type, int modified)
420 struct curseg_info *curseg = CURSEG_I(sbi, type);
421 struct summary_footer *sum_footer;
423 curseg->segno = curseg->next_segno;
424 curseg->zone = GET_ZONENO_FROM_SEGNO(sbi, curseg->segno);
425 curseg->next_blkoff = 0;
426 curseg->next_segno = NULL_SEGNO;
428 sum_footer = &(curseg->sum_blk->footer);
429 memset(sum_footer, 0, sizeof(struct summary_footer));
430 if (IS_DATASEG(type))
431 SET_SUM_TYPE(sum_footer, SUM_TYPE_DATA);
432 if (IS_NODESEG(type))
433 SET_SUM_TYPE(sum_footer, SUM_TYPE_NODE);
434 __set_sit_entry_type(sbi, type, curseg->segno, modified);
438 * Allocate a current working segment.
439 * This function always allocates a free segment in LFS manner.
441 static void new_curseg(struct f2fs_sb_info *sbi, int type, bool new_sec)
443 struct curseg_info *curseg = CURSEG_I(sbi, type);
444 unsigned int segno = curseg->segno;
445 int dir = ALLOC_LEFT;
447 write_sum_page(sbi, curseg->sum_blk,
448 GET_SUM_BLOCK(sbi, segno));
449 if (type == CURSEG_WARM_DATA || type == CURSEG_COLD_DATA)
452 if (test_opt(sbi, NOHEAP))
455 get_new_segment(sbi, &segno, new_sec, dir);
456 curseg->next_segno = segno;
457 reset_curseg(sbi, type, 1);
458 curseg->alloc_type = LFS;
461 static void __next_free_blkoff(struct f2fs_sb_info *sbi,
462 struct curseg_info *seg, block_t start)
464 struct seg_entry *se = get_seg_entry(sbi, seg->segno);
466 for (ofs = start; ofs < sbi->blocks_per_seg; ofs++) {
467 if (!f2fs_test_bit(ofs, se->ckpt_valid_map)
468 && !f2fs_test_bit(ofs, se->cur_valid_map))
471 seg->next_blkoff = ofs;
475 * If a segment is written by LFS manner, next block offset is just obtained
476 * by increasing the current block offset. However, if a segment is written by
477 * SSR manner, next block offset obtained by calling __next_free_blkoff
479 static void __refresh_next_blkoff(struct f2fs_sb_info *sbi,
480 struct curseg_info *seg)
482 if (seg->alloc_type == SSR)
483 __next_free_blkoff(sbi, seg, seg->next_blkoff + 1);
489 * This function always allocates a used segment (from dirty seglist) by SSR
490 * manner, so it should recover the existing segment information of valid blocks
492 static void change_curseg(struct f2fs_sb_info *sbi, int type, bool reuse)
494 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
495 struct curseg_info *curseg = CURSEG_I(sbi, type);
496 unsigned int new_segno = curseg->next_segno;
497 struct f2fs_summary_block *sum_node;
498 struct page *sum_page;
500 write_sum_page(sbi, curseg->sum_blk,
501 GET_SUM_BLOCK(sbi, curseg->segno));
502 __set_test_and_inuse(sbi, new_segno);
504 mutex_lock(&dirty_i->seglist_lock);
505 __remove_dirty_segment(sbi, new_segno, PRE);
506 __remove_dirty_segment(sbi, new_segno, DIRTY);
507 mutex_unlock(&dirty_i->seglist_lock);
509 reset_curseg(sbi, type, 1);
510 curseg->alloc_type = SSR;
511 __next_free_blkoff(sbi, curseg, 0);
514 sum_page = get_sum_page(sbi, new_segno);
515 sum_node = (struct f2fs_summary_block *)page_address(sum_page);
516 memcpy(curseg->sum_blk, sum_node, SUM_ENTRY_SIZE);
517 f2fs_put_page(sum_page, 1);
521 static int get_ssr_segment(struct f2fs_sb_info *sbi, int type)
523 struct curseg_info *curseg = CURSEG_I(sbi, type);
524 const struct victim_selection *v_ops = DIRTY_I(sbi)->v_ops;
526 if (IS_NODESEG(type) || !has_not_enough_free_secs(sbi, 0))
527 return v_ops->get_victim(sbi,
528 &(curseg)->next_segno, BG_GC, type, SSR);
530 /* For data segments, let's do SSR more intensively */
531 for (; type >= CURSEG_HOT_DATA; type--)
532 if (v_ops->get_victim(sbi, &(curseg)->next_segno,
539 * flush out current segment and replace it with new segment
540 * This function should be returned with success, otherwise BUG
542 static void allocate_segment_by_default(struct f2fs_sb_info *sbi,
543 int type, bool force)
545 struct curseg_info *curseg = CURSEG_I(sbi, type);
548 new_curseg(sbi, type, true);
549 else if (type == CURSEG_WARM_NODE)
550 new_curseg(sbi, type, false);
551 else if (curseg->alloc_type == LFS && is_next_segment_free(sbi, type))
552 new_curseg(sbi, type, false);
553 else if (need_SSR(sbi) && get_ssr_segment(sbi, type))
554 change_curseg(sbi, type, true);
556 new_curseg(sbi, type, false);
558 stat_inc_seg_type(sbi, curseg);
561 void allocate_new_segments(struct f2fs_sb_info *sbi)
563 struct curseg_info *curseg;
564 unsigned int old_curseg;
567 for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) {
568 curseg = CURSEG_I(sbi, i);
569 old_curseg = curseg->segno;
570 SIT_I(sbi)->s_ops->allocate_segment(sbi, i, true);
571 locate_dirty_segment(sbi, old_curseg);
575 static const struct segment_allocation default_salloc_ops = {
576 .allocate_segment = allocate_segment_by_default,
579 static void f2fs_end_io_write(struct bio *bio, int err)
581 const int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags);
582 struct bio_vec *bvec = bio->bi_io_vec + bio->bi_vcnt - 1;
583 struct bio_private *p = bio->bi_private;
586 struct page *page = bvec->bv_page;
588 if (--bvec >= bio->bi_io_vec)
589 prefetchw(&bvec->bv_page->flags);
593 set_bit(AS_EIO, &page->mapping->flags);
594 set_ckpt_flags(p->sbi->ckpt, CP_ERROR_FLAG);
595 p->sbi->sb->s_flags |= MS_RDONLY;
597 end_page_writeback(page);
598 dec_page_count(p->sbi, F2FS_WRITEBACK);
599 } while (bvec >= bio->bi_io_vec);
604 if (!get_pages(p->sbi, F2FS_WRITEBACK) && p->sbi->cp_task)
605 wake_up_process(p->sbi->cp_task);
611 struct bio *f2fs_bio_alloc(struct block_device *bdev, int npages)
615 /* No failure on bio allocation */
616 bio = bio_alloc(GFP_NOIO, npages);
618 bio->bi_private = NULL;
623 static void do_submit_bio(struct f2fs_sb_info *sbi,
624 enum page_type type, bool sync)
626 int rw = sync ? WRITE_SYNC : WRITE;
627 enum page_type btype = type > META ? META : type;
629 if (type >= META_FLUSH)
630 rw = WRITE_FLUSH_FUA;
635 if (sbi->bio[btype]) {
636 struct bio_private *p = sbi->bio[btype]->bi_private;
638 sbi->bio[btype]->bi_end_io = f2fs_end_io_write;
640 trace_f2fs_do_submit_bio(sbi->sb, btype, sync, sbi->bio[btype]);
642 if (type == META_FLUSH) {
643 DECLARE_COMPLETION_ONSTACK(wait);
646 submit_bio(rw, sbi->bio[btype]);
647 wait_for_completion(&wait);
650 submit_bio(rw, sbi->bio[btype]);
652 sbi->bio[btype] = NULL;
656 void f2fs_submit_bio(struct f2fs_sb_info *sbi, enum page_type type, bool sync)
658 down_write(&sbi->bio_sem);
659 do_submit_bio(sbi, type, sync);
660 up_write(&sbi->bio_sem);
663 static void submit_write_page(struct f2fs_sb_info *sbi, struct page *page,
664 block_t blk_addr, enum page_type type)
666 struct block_device *bdev = sbi->sb->s_bdev;
669 verify_block_addr(sbi, blk_addr);
671 down_write(&sbi->bio_sem);
673 inc_page_count(sbi, F2FS_WRITEBACK);
675 if (sbi->bio[type] && sbi->last_block_in_bio[type] != blk_addr - 1)
676 do_submit_bio(sbi, type, false);
678 if (sbi->bio[type] == NULL) {
679 struct bio_private *priv;
681 priv = kmalloc(sizeof(struct bio_private), GFP_NOFS);
687 bio_blocks = MAX_BIO_BLOCKS(max_hw_blocks(sbi));
688 sbi->bio[type] = f2fs_bio_alloc(bdev, bio_blocks);
689 sbi->bio[type]->bi_sector = SECTOR_FROM_BLOCK(sbi, blk_addr);
690 sbi->bio[type]->bi_private = priv;
692 * The end_io will be assigned at the sumbission phase.
693 * Until then, let bio_add_page() merge consecutive IOs as much
698 if (bio_add_page(sbi->bio[type], page, PAGE_CACHE_SIZE, 0) <
700 do_submit_bio(sbi, type, false);
704 sbi->last_block_in_bio[type] = blk_addr;
706 up_write(&sbi->bio_sem);
707 trace_f2fs_submit_write_page(page, blk_addr, type);
710 void f2fs_wait_on_page_writeback(struct page *page,
711 enum page_type type, bool sync)
713 struct f2fs_sb_info *sbi = F2FS_SB(page->mapping->host->i_sb);
714 if (PageWriteback(page)) {
715 f2fs_submit_bio(sbi, type, sync);
716 wait_on_page_writeback(page);
720 static bool __has_curseg_space(struct f2fs_sb_info *sbi, int type)
722 struct curseg_info *curseg = CURSEG_I(sbi, type);
723 if (curseg->next_blkoff < sbi->blocks_per_seg)
728 static int __get_segment_type_2(struct page *page, enum page_type p_type)
731 return CURSEG_HOT_DATA;
733 return CURSEG_HOT_NODE;
736 static int __get_segment_type_4(struct page *page, enum page_type p_type)
738 if (p_type == DATA) {
739 struct inode *inode = page->mapping->host;
741 if (S_ISDIR(inode->i_mode))
742 return CURSEG_HOT_DATA;
744 return CURSEG_COLD_DATA;
746 if (IS_DNODE(page) && !is_cold_node(page))
747 return CURSEG_HOT_NODE;
749 return CURSEG_COLD_NODE;
753 static int __get_segment_type_6(struct page *page, enum page_type p_type)
755 if (p_type == DATA) {
756 struct inode *inode = page->mapping->host;
758 if (S_ISDIR(inode->i_mode))
759 return CURSEG_HOT_DATA;
760 else if (is_cold_data(page) || file_is_cold(inode))
761 return CURSEG_COLD_DATA;
763 return CURSEG_WARM_DATA;
766 return is_cold_node(page) ? CURSEG_WARM_NODE :
769 return CURSEG_COLD_NODE;
773 static int __get_segment_type(struct page *page, enum page_type p_type)
775 struct f2fs_sb_info *sbi = F2FS_SB(page->mapping->host->i_sb);
776 switch (sbi->active_logs) {
778 return __get_segment_type_2(page, p_type);
780 return __get_segment_type_4(page, p_type);
782 /* NR_CURSEG_TYPE(6) logs by default */
783 BUG_ON(sbi->active_logs != NR_CURSEG_TYPE);
784 return __get_segment_type_6(page, p_type);
787 static void do_write_page(struct f2fs_sb_info *sbi, struct page *page,
788 block_t old_blkaddr, block_t *new_blkaddr,
789 struct f2fs_summary *sum, enum page_type p_type)
791 struct sit_info *sit_i = SIT_I(sbi);
792 struct curseg_info *curseg;
793 unsigned int old_cursegno;
796 type = __get_segment_type(page, p_type);
797 curseg = CURSEG_I(sbi, type);
799 mutex_lock(&curseg->curseg_mutex);
801 *new_blkaddr = NEXT_FREE_BLKADDR(sbi, curseg);
802 old_cursegno = curseg->segno;
805 * __add_sum_entry should be resided under the curseg_mutex
806 * because, this function updates a summary entry in the
807 * current summary block.
809 __add_sum_entry(sbi, type, sum);
811 mutex_lock(&sit_i->sentry_lock);
812 __refresh_next_blkoff(sbi, curseg);
814 stat_inc_block_count(sbi, curseg);
817 * SIT information should be updated before segment allocation,
818 * since SSR needs latest valid block information.
820 refresh_sit_entry(sbi, old_blkaddr, *new_blkaddr);
822 if (!__has_curseg_space(sbi, type))
823 sit_i->s_ops->allocate_segment(sbi, type, false);
825 locate_dirty_segment(sbi, old_cursegno);
826 locate_dirty_segment(sbi, GET_SEGNO(sbi, old_blkaddr));
827 mutex_unlock(&sit_i->sentry_lock);
830 fill_node_footer_blkaddr(page, NEXT_FREE_BLKADDR(sbi, curseg));
832 /* writeout dirty page into bdev */
833 submit_write_page(sbi, page, *new_blkaddr, p_type);
835 mutex_unlock(&curseg->curseg_mutex);
838 void write_meta_page(struct f2fs_sb_info *sbi, struct page *page)
840 set_page_writeback(page);
841 submit_write_page(sbi, page, page->index, META);
844 void write_node_page(struct f2fs_sb_info *sbi, struct page *page,
845 unsigned int nid, block_t old_blkaddr, block_t *new_blkaddr)
847 struct f2fs_summary sum;
848 set_summary(&sum, nid, 0, 0);
849 do_write_page(sbi, page, old_blkaddr, new_blkaddr, &sum, NODE);
852 void write_data_page(struct inode *inode, struct page *page,
853 struct dnode_of_data *dn, block_t old_blkaddr,
854 block_t *new_blkaddr)
856 struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
857 struct f2fs_summary sum;
860 BUG_ON(old_blkaddr == NULL_ADDR);
861 get_node_info(sbi, dn->nid, &ni);
862 set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version);
864 do_write_page(sbi, page, old_blkaddr,
865 new_blkaddr, &sum, DATA);
868 void rewrite_data_page(struct f2fs_sb_info *sbi, struct page *page,
869 block_t old_blk_addr)
871 submit_write_page(sbi, page, old_blk_addr, DATA);
874 void recover_data_page(struct f2fs_sb_info *sbi,
875 struct page *page, struct f2fs_summary *sum,
876 block_t old_blkaddr, block_t new_blkaddr)
878 struct sit_info *sit_i = SIT_I(sbi);
879 struct curseg_info *curseg;
880 unsigned int segno, old_cursegno;
881 struct seg_entry *se;
884 segno = GET_SEGNO(sbi, new_blkaddr);
885 se = get_seg_entry(sbi, segno);
888 if (se->valid_blocks == 0 && !IS_CURSEG(sbi, segno)) {
889 if (old_blkaddr == NULL_ADDR)
890 type = CURSEG_COLD_DATA;
892 type = CURSEG_WARM_DATA;
894 curseg = CURSEG_I(sbi, type);
896 mutex_lock(&curseg->curseg_mutex);
897 mutex_lock(&sit_i->sentry_lock);
899 old_cursegno = curseg->segno;
901 /* change the current segment */
902 if (segno != curseg->segno) {
903 curseg->next_segno = segno;
904 change_curseg(sbi, type, true);
907 curseg->next_blkoff = GET_SEGOFF_FROM_SEG0(sbi, new_blkaddr) &
908 (sbi->blocks_per_seg - 1);
909 __add_sum_entry(sbi, type, sum);
911 refresh_sit_entry(sbi, old_blkaddr, new_blkaddr);
913 locate_dirty_segment(sbi, old_cursegno);
914 locate_dirty_segment(sbi, GET_SEGNO(sbi, old_blkaddr));
916 mutex_unlock(&sit_i->sentry_lock);
917 mutex_unlock(&curseg->curseg_mutex);
920 void rewrite_node_page(struct f2fs_sb_info *sbi,
921 struct page *page, struct f2fs_summary *sum,
922 block_t old_blkaddr, block_t new_blkaddr)
924 struct sit_info *sit_i = SIT_I(sbi);
925 int type = CURSEG_WARM_NODE;
926 struct curseg_info *curseg;
927 unsigned int segno, old_cursegno;
928 block_t next_blkaddr = next_blkaddr_of_node(page);
929 unsigned int next_segno = GET_SEGNO(sbi, next_blkaddr);
931 curseg = CURSEG_I(sbi, type);
933 mutex_lock(&curseg->curseg_mutex);
934 mutex_lock(&sit_i->sentry_lock);
936 segno = GET_SEGNO(sbi, new_blkaddr);
937 old_cursegno = curseg->segno;
939 /* change the current segment */
940 if (segno != curseg->segno) {
941 curseg->next_segno = segno;
942 change_curseg(sbi, type, true);
944 curseg->next_blkoff = GET_SEGOFF_FROM_SEG0(sbi, new_blkaddr) &
945 (sbi->blocks_per_seg - 1);
946 __add_sum_entry(sbi, type, sum);
948 /* change the current log to the next block addr in advance */
949 if (next_segno != segno) {
950 curseg->next_segno = next_segno;
951 change_curseg(sbi, type, true);
953 curseg->next_blkoff = GET_SEGOFF_FROM_SEG0(sbi, next_blkaddr) &
954 (sbi->blocks_per_seg - 1);
956 /* rewrite node page */
957 set_page_writeback(page);
958 submit_write_page(sbi, page, new_blkaddr, NODE);
959 f2fs_submit_bio(sbi, NODE, true);
960 refresh_sit_entry(sbi, old_blkaddr, new_blkaddr);
962 locate_dirty_segment(sbi, old_cursegno);
963 locate_dirty_segment(sbi, GET_SEGNO(sbi, old_blkaddr));
965 mutex_unlock(&sit_i->sentry_lock);
966 mutex_unlock(&curseg->curseg_mutex);
969 static int read_compacted_summaries(struct f2fs_sb_info *sbi)
971 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
972 struct curseg_info *seg_i;
973 unsigned char *kaddr;
978 start = start_sum_block(sbi);
980 page = get_meta_page(sbi, start++);
981 kaddr = (unsigned char *)page_address(page);
983 /* Step 1: restore nat cache */
984 seg_i = CURSEG_I(sbi, CURSEG_HOT_DATA);
985 memcpy(&seg_i->sum_blk->n_nats, kaddr, SUM_JOURNAL_SIZE);
987 /* Step 2: restore sit cache */
988 seg_i = CURSEG_I(sbi, CURSEG_COLD_DATA);
989 memcpy(&seg_i->sum_blk->n_sits, kaddr + SUM_JOURNAL_SIZE,
991 offset = 2 * SUM_JOURNAL_SIZE;
993 /* Step 3: restore summary entries */
994 for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) {
995 unsigned short blk_off;
998 seg_i = CURSEG_I(sbi, i);
999 segno = le32_to_cpu(ckpt->cur_data_segno[i]);
1000 blk_off = le16_to_cpu(ckpt->cur_data_blkoff[i]);
1001 seg_i->next_segno = segno;
1002 reset_curseg(sbi, i, 0);
1003 seg_i->alloc_type = ckpt->alloc_type[i];
1004 seg_i->next_blkoff = blk_off;
1006 if (seg_i->alloc_type == SSR)
1007 blk_off = sbi->blocks_per_seg;
1009 for (j = 0; j < blk_off; j++) {
1010 struct f2fs_summary *s;
1011 s = (struct f2fs_summary *)(kaddr + offset);
1012 seg_i->sum_blk->entries[j] = *s;
1013 offset += SUMMARY_SIZE;
1014 if (offset + SUMMARY_SIZE <= PAGE_CACHE_SIZE -
1018 f2fs_put_page(page, 1);
1021 page = get_meta_page(sbi, start++);
1022 kaddr = (unsigned char *)page_address(page);
1026 f2fs_put_page(page, 1);
1030 static int read_normal_summaries(struct f2fs_sb_info *sbi, int type)
1032 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1033 struct f2fs_summary_block *sum;
1034 struct curseg_info *curseg;
1036 unsigned short blk_off;
1037 unsigned int segno = 0;
1038 block_t blk_addr = 0;
1040 /* get segment number and block addr */
1041 if (IS_DATASEG(type)) {
1042 segno = le32_to_cpu(ckpt->cur_data_segno[type]);
1043 blk_off = le16_to_cpu(ckpt->cur_data_blkoff[type -
1045 if (is_set_ckpt_flags(ckpt, CP_UMOUNT_FLAG))
1046 blk_addr = sum_blk_addr(sbi, NR_CURSEG_TYPE, type);
1048 blk_addr = sum_blk_addr(sbi, NR_CURSEG_DATA_TYPE, type);
1050 segno = le32_to_cpu(ckpt->cur_node_segno[type -
1052 blk_off = le16_to_cpu(ckpt->cur_node_blkoff[type -
1054 if (is_set_ckpt_flags(ckpt, CP_UMOUNT_FLAG))
1055 blk_addr = sum_blk_addr(sbi, NR_CURSEG_NODE_TYPE,
1056 type - CURSEG_HOT_NODE);
1058 blk_addr = GET_SUM_BLOCK(sbi, segno);
1061 new = get_meta_page(sbi, blk_addr);
1062 sum = (struct f2fs_summary_block *)page_address(new);
1064 if (IS_NODESEG(type)) {
1065 if (is_set_ckpt_flags(ckpt, CP_UMOUNT_FLAG)) {
1066 struct f2fs_summary *ns = &sum->entries[0];
1068 for (i = 0; i < sbi->blocks_per_seg; i++, ns++) {
1070 ns->ofs_in_node = 0;
1073 if (restore_node_summary(sbi, segno, sum)) {
1074 f2fs_put_page(new, 1);
1080 /* set uncompleted segment to curseg */
1081 curseg = CURSEG_I(sbi, type);
1082 mutex_lock(&curseg->curseg_mutex);
1083 memcpy(curseg->sum_blk, sum, PAGE_CACHE_SIZE);
1084 curseg->next_segno = segno;
1085 reset_curseg(sbi, type, 0);
1086 curseg->alloc_type = ckpt->alloc_type[type];
1087 curseg->next_blkoff = blk_off;
1088 mutex_unlock(&curseg->curseg_mutex);
1089 f2fs_put_page(new, 1);
1093 static int restore_curseg_summaries(struct f2fs_sb_info *sbi)
1095 int type = CURSEG_HOT_DATA;
1097 if (is_set_ckpt_flags(F2FS_CKPT(sbi), CP_COMPACT_SUM_FLAG)) {
1098 /* restore for compacted data summary */
1099 if (read_compacted_summaries(sbi))
1101 type = CURSEG_HOT_NODE;
1104 for (; type <= CURSEG_COLD_NODE; type++)
1105 if (read_normal_summaries(sbi, type))
1110 static void write_compacted_summaries(struct f2fs_sb_info *sbi, block_t blkaddr)
1113 unsigned char *kaddr;
1114 struct f2fs_summary *summary;
1115 struct curseg_info *seg_i;
1116 int written_size = 0;
1119 page = grab_meta_page(sbi, blkaddr++);
1120 kaddr = (unsigned char *)page_address(page);
1122 /* Step 1: write nat cache */
1123 seg_i = CURSEG_I(sbi, CURSEG_HOT_DATA);
1124 memcpy(kaddr, &seg_i->sum_blk->n_nats, SUM_JOURNAL_SIZE);
1125 written_size += SUM_JOURNAL_SIZE;
1127 /* Step 2: write sit cache */
1128 seg_i = CURSEG_I(sbi, CURSEG_COLD_DATA);
1129 memcpy(kaddr + written_size, &seg_i->sum_blk->n_sits,
1131 written_size += SUM_JOURNAL_SIZE;
1133 set_page_dirty(page);
1135 /* Step 3: write summary entries */
1136 for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) {
1137 unsigned short blkoff;
1138 seg_i = CURSEG_I(sbi, i);
1139 if (sbi->ckpt->alloc_type[i] == SSR)
1140 blkoff = sbi->blocks_per_seg;
1142 blkoff = curseg_blkoff(sbi, i);
1144 for (j = 0; j < blkoff; j++) {
1146 page = grab_meta_page(sbi, blkaddr++);
1147 kaddr = (unsigned char *)page_address(page);
1150 summary = (struct f2fs_summary *)(kaddr + written_size);
1151 *summary = seg_i->sum_blk->entries[j];
1152 written_size += SUMMARY_SIZE;
1153 set_page_dirty(page);
1155 if (written_size + SUMMARY_SIZE <= PAGE_CACHE_SIZE -
1159 f2fs_put_page(page, 1);
1164 f2fs_put_page(page, 1);
1167 static void write_normal_summaries(struct f2fs_sb_info *sbi,
1168 block_t blkaddr, int type)
1171 if (IS_DATASEG(type))
1172 end = type + NR_CURSEG_DATA_TYPE;
1174 end = type + NR_CURSEG_NODE_TYPE;
1176 for (i = type; i < end; i++) {
1177 struct curseg_info *sum = CURSEG_I(sbi, i);
1178 mutex_lock(&sum->curseg_mutex);
1179 write_sum_page(sbi, sum->sum_blk, blkaddr + (i - type));
1180 mutex_unlock(&sum->curseg_mutex);
1184 void write_data_summaries(struct f2fs_sb_info *sbi, block_t start_blk)
1186 if (is_set_ckpt_flags(F2FS_CKPT(sbi), CP_COMPACT_SUM_FLAG))
1187 write_compacted_summaries(sbi, start_blk);
1189 write_normal_summaries(sbi, start_blk, CURSEG_HOT_DATA);
1192 void write_node_summaries(struct f2fs_sb_info *sbi, block_t start_blk)
1194 if (is_set_ckpt_flags(F2FS_CKPT(sbi), CP_UMOUNT_FLAG))
1195 write_normal_summaries(sbi, start_blk, CURSEG_HOT_NODE);
1198 int lookup_journal_in_cursum(struct f2fs_summary_block *sum, int type,
1199 unsigned int val, int alloc)
1203 if (type == NAT_JOURNAL) {
1204 for (i = 0; i < nats_in_cursum(sum); i++) {
1205 if (le32_to_cpu(nid_in_journal(sum, i)) == val)
1208 if (alloc && nats_in_cursum(sum) < NAT_JOURNAL_ENTRIES)
1209 return update_nats_in_cursum(sum, 1);
1210 } else if (type == SIT_JOURNAL) {
1211 for (i = 0; i < sits_in_cursum(sum); i++)
1212 if (le32_to_cpu(segno_in_journal(sum, i)) == val)
1214 if (alloc && sits_in_cursum(sum) < SIT_JOURNAL_ENTRIES)
1215 return update_sits_in_cursum(sum, 1);
1220 static struct page *get_current_sit_page(struct f2fs_sb_info *sbi,
1223 struct sit_info *sit_i = SIT_I(sbi);
1224 unsigned int offset = SIT_BLOCK_OFFSET(sit_i, segno);
1225 block_t blk_addr = sit_i->sit_base_addr + offset;
1227 check_seg_range(sbi, segno);
1229 /* calculate sit block address */
1230 if (f2fs_test_bit(offset, sit_i->sit_bitmap))
1231 blk_addr += sit_i->sit_blocks;
1233 return get_meta_page(sbi, blk_addr);
1236 static struct page *get_next_sit_page(struct f2fs_sb_info *sbi,
1239 struct sit_info *sit_i = SIT_I(sbi);
1240 struct page *src_page, *dst_page;
1241 pgoff_t src_off, dst_off;
1242 void *src_addr, *dst_addr;
1244 src_off = current_sit_addr(sbi, start);
1245 dst_off = next_sit_addr(sbi, src_off);
1247 /* get current sit block page without lock */
1248 src_page = get_meta_page(sbi, src_off);
1249 dst_page = grab_meta_page(sbi, dst_off);
1250 BUG_ON(PageDirty(src_page));
1252 src_addr = page_address(src_page);
1253 dst_addr = page_address(dst_page);
1254 memcpy(dst_addr, src_addr, PAGE_CACHE_SIZE);
1256 set_page_dirty(dst_page);
1257 f2fs_put_page(src_page, 1);
1259 set_to_next_sit(sit_i, start);
1264 static bool flush_sits_in_journal(struct f2fs_sb_info *sbi)
1266 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA);
1267 struct f2fs_summary_block *sum = curseg->sum_blk;
1271 * If the journal area in the current summary is full of sit entries,
1272 * all the sit entries will be flushed. Otherwise the sit entries
1273 * are not able to replace with newly hot sit entries.
1275 if (sits_in_cursum(sum) >= SIT_JOURNAL_ENTRIES) {
1276 for (i = sits_in_cursum(sum) - 1; i >= 0; i--) {
1278 segno = le32_to_cpu(segno_in_journal(sum, i));
1279 __mark_sit_entry_dirty(sbi, segno);
1281 update_sits_in_cursum(sum, -sits_in_cursum(sum));
1288 * CP calls this function, which flushes SIT entries including sit_journal,
1289 * and moves prefree segs to free segs.
1291 void flush_sit_entries(struct f2fs_sb_info *sbi)
1293 struct sit_info *sit_i = SIT_I(sbi);
1294 unsigned long *bitmap = sit_i->dirty_sentries_bitmap;
1295 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA);
1296 struct f2fs_summary_block *sum = curseg->sum_blk;
1297 unsigned long nsegs = TOTAL_SEGS(sbi);
1298 struct page *page = NULL;
1299 struct f2fs_sit_block *raw_sit = NULL;
1300 unsigned int start = 0, end = 0;
1301 unsigned int segno = -1;
1304 mutex_lock(&curseg->curseg_mutex);
1305 mutex_lock(&sit_i->sentry_lock);
1308 * "flushed" indicates whether sit entries in journal are flushed
1309 * to the SIT area or not.
1311 flushed = flush_sits_in_journal(sbi);
1313 while ((segno = find_next_bit(bitmap, nsegs, segno + 1)) < nsegs) {
1314 struct seg_entry *se = get_seg_entry(sbi, segno);
1315 int sit_offset, offset;
1317 sit_offset = SIT_ENTRY_OFFSET(sit_i, segno);
1322 offset = lookup_journal_in_cursum(sum, SIT_JOURNAL, segno, 1);
1324 segno_in_journal(sum, offset) = cpu_to_le32(segno);
1325 seg_info_to_raw_sit(se, &sit_in_journal(sum, offset));
1329 if (!page || (start > segno) || (segno > end)) {
1331 f2fs_put_page(page, 1);
1335 start = START_SEGNO(sit_i, segno);
1336 end = start + SIT_ENTRY_PER_BLOCK - 1;
1338 /* read sit block that will be updated */
1339 page = get_next_sit_page(sbi, start);
1340 raw_sit = page_address(page);
1343 /* udpate entry in SIT block */
1344 seg_info_to_raw_sit(se, &raw_sit->entries[sit_offset]);
1346 __clear_bit(segno, bitmap);
1347 sit_i->dirty_sentries--;
1349 mutex_unlock(&sit_i->sentry_lock);
1350 mutex_unlock(&curseg->curseg_mutex);
1352 /* writeout last modified SIT block */
1353 f2fs_put_page(page, 1);
1355 set_prefree_as_free_segments(sbi);
1358 static int build_sit_info(struct f2fs_sb_info *sbi)
1360 struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
1361 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1362 struct sit_info *sit_i;
1363 unsigned int sit_segs, start;
1364 char *src_bitmap, *dst_bitmap;
1365 unsigned int bitmap_size;
1367 /* allocate memory for SIT information */
1368 sit_i = kzalloc(sizeof(struct sit_info), GFP_KERNEL);
1372 SM_I(sbi)->sit_info = sit_i;
1374 sit_i->sentries = vzalloc(TOTAL_SEGS(sbi) * sizeof(struct seg_entry));
1375 if (!sit_i->sentries)
1378 bitmap_size = f2fs_bitmap_size(TOTAL_SEGS(sbi));
1379 sit_i->dirty_sentries_bitmap = kzalloc(bitmap_size, GFP_KERNEL);
1380 if (!sit_i->dirty_sentries_bitmap)
1383 for (start = 0; start < TOTAL_SEGS(sbi); start++) {
1384 sit_i->sentries[start].cur_valid_map
1385 = kzalloc(SIT_VBLOCK_MAP_SIZE, GFP_KERNEL);
1386 sit_i->sentries[start].ckpt_valid_map
1387 = kzalloc(SIT_VBLOCK_MAP_SIZE, GFP_KERNEL);
1388 if (!sit_i->sentries[start].cur_valid_map
1389 || !sit_i->sentries[start].ckpt_valid_map)
1393 if (sbi->segs_per_sec > 1) {
1394 sit_i->sec_entries = vzalloc(TOTAL_SECS(sbi) *
1395 sizeof(struct sec_entry));
1396 if (!sit_i->sec_entries)
1400 /* get information related with SIT */
1401 sit_segs = le32_to_cpu(raw_super->segment_count_sit) >> 1;
1403 /* setup SIT bitmap from ckeckpoint pack */
1404 bitmap_size = __bitmap_size(sbi, SIT_BITMAP);
1405 src_bitmap = __bitmap_ptr(sbi, SIT_BITMAP);
1407 dst_bitmap = kmemdup(src_bitmap, bitmap_size, GFP_KERNEL);
1411 /* init SIT information */
1412 sit_i->s_ops = &default_salloc_ops;
1414 sit_i->sit_base_addr = le32_to_cpu(raw_super->sit_blkaddr);
1415 sit_i->sit_blocks = sit_segs << sbi->log_blocks_per_seg;
1416 sit_i->written_valid_blocks = le64_to_cpu(ckpt->valid_block_count);
1417 sit_i->sit_bitmap = dst_bitmap;
1418 sit_i->bitmap_size = bitmap_size;
1419 sit_i->dirty_sentries = 0;
1420 sit_i->sents_per_block = SIT_ENTRY_PER_BLOCK;
1421 sit_i->elapsed_time = le64_to_cpu(sbi->ckpt->elapsed_time);
1422 sit_i->mounted_time = CURRENT_TIME_SEC.tv_sec;
1423 mutex_init(&sit_i->sentry_lock);
1427 static int build_free_segmap(struct f2fs_sb_info *sbi)
1429 struct f2fs_sm_info *sm_info = SM_I(sbi);
1430 struct free_segmap_info *free_i;
1431 unsigned int bitmap_size, sec_bitmap_size;
1433 /* allocate memory for free segmap information */
1434 free_i = kzalloc(sizeof(struct free_segmap_info), GFP_KERNEL);
1438 SM_I(sbi)->free_info = free_i;
1440 bitmap_size = f2fs_bitmap_size(TOTAL_SEGS(sbi));
1441 free_i->free_segmap = kmalloc(bitmap_size, GFP_KERNEL);
1442 if (!free_i->free_segmap)
1445 sec_bitmap_size = f2fs_bitmap_size(TOTAL_SECS(sbi));
1446 free_i->free_secmap = kmalloc(sec_bitmap_size, GFP_KERNEL);
1447 if (!free_i->free_secmap)
1450 /* set all segments as dirty temporarily */
1451 memset(free_i->free_segmap, 0xff, bitmap_size);
1452 memset(free_i->free_secmap, 0xff, sec_bitmap_size);
1454 /* init free segmap information */
1455 free_i->start_segno =
1456 (unsigned int) GET_SEGNO_FROM_SEG0(sbi, sm_info->main_blkaddr);
1457 free_i->free_segments = 0;
1458 free_i->free_sections = 0;
1459 rwlock_init(&free_i->segmap_lock);
1463 static int build_curseg(struct f2fs_sb_info *sbi)
1465 struct curseg_info *array;
1468 array = kzalloc(sizeof(*array) * NR_CURSEG_TYPE, GFP_KERNEL);
1472 SM_I(sbi)->curseg_array = array;
1474 for (i = 0; i < NR_CURSEG_TYPE; i++) {
1475 mutex_init(&array[i].curseg_mutex);
1476 array[i].sum_blk = kzalloc(PAGE_CACHE_SIZE, GFP_KERNEL);
1477 if (!array[i].sum_blk)
1479 array[i].segno = NULL_SEGNO;
1480 array[i].next_blkoff = 0;
1482 return restore_curseg_summaries(sbi);
1485 static void build_sit_entries(struct f2fs_sb_info *sbi)
1487 struct sit_info *sit_i = SIT_I(sbi);
1488 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA);
1489 struct f2fs_summary_block *sum = curseg->sum_blk;
1492 for (start = 0; start < TOTAL_SEGS(sbi); start++) {
1493 struct seg_entry *se = &sit_i->sentries[start];
1494 struct f2fs_sit_block *sit_blk;
1495 struct f2fs_sit_entry sit;
1499 mutex_lock(&curseg->curseg_mutex);
1500 for (i = 0; i < sits_in_cursum(sum); i++) {
1501 if (le32_to_cpu(segno_in_journal(sum, i)) == start) {
1502 sit = sit_in_journal(sum, i);
1503 mutex_unlock(&curseg->curseg_mutex);
1507 mutex_unlock(&curseg->curseg_mutex);
1508 page = get_current_sit_page(sbi, start);
1509 sit_blk = (struct f2fs_sit_block *)page_address(page);
1510 sit = sit_blk->entries[SIT_ENTRY_OFFSET(sit_i, start)];
1511 f2fs_put_page(page, 1);
1513 check_block_count(sbi, start, &sit);
1514 seg_info_from_raw_sit(se, &sit);
1515 if (sbi->segs_per_sec > 1) {
1516 struct sec_entry *e = get_sec_entry(sbi, start);
1517 e->valid_blocks += se->valid_blocks;
1522 static void init_free_segmap(struct f2fs_sb_info *sbi)
1527 for (start = 0; start < TOTAL_SEGS(sbi); start++) {
1528 struct seg_entry *sentry = get_seg_entry(sbi, start);
1529 if (!sentry->valid_blocks)
1530 __set_free(sbi, start);
1533 /* set use the current segments */
1534 for (type = CURSEG_HOT_DATA; type <= CURSEG_COLD_NODE; type++) {
1535 struct curseg_info *curseg_t = CURSEG_I(sbi, type);
1536 __set_test_and_inuse(sbi, curseg_t->segno);
1540 static void init_dirty_segmap(struct f2fs_sb_info *sbi)
1542 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
1543 struct free_segmap_info *free_i = FREE_I(sbi);
1544 unsigned int segno = 0, offset = 0, total_segs = TOTAL_SEGS(sbi);
1545 unsigned short valid_blocks;
1548 /* find dirty segment based on free segmap */
1549 segno = find_next_inuse(free_i, total_segs, offset);
1550 if (segno >= total_segs)
1553 valid_blocks = get_valid_blocks(sbi, segno, 0);
1554 if (valid_blocks >= sbi->blocks_per_seg || !valid_blocks)
1556 mutex_lock(&dirty_i->seglist_lock);
1557 __locate_dirty_segment(sbi, segno, DIRTY);
1558 mutex_unlock(&dirty_i->seglist_lock);
1562 static int init_victim_secmap(struct f2fs_sb_info *sbi)
1564 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
1565 unsigned int bitmap_size = f2fs_bitmap_size(TOTAL_SECS(sbi));
1567 dirty_i->victim_secmap = kzalloc(bitmap_size, GFP_KERNEL);
1568 if (!dirty_i->victim_secmap)
1573 static int build_dirty_segmap(struct f2fs_sb_info *sbi)
1575 struct dirty_seglist_info *dirty_i;
1576 unsigned int bitmap_size, i;
1578 /* allocate memory for dirty segments list information */
1579 dirty_i = kzalloc(sizeof(struct dirty_seglist_info), GFP_KERNEL);
1583 SM_I(sbi)->dirty_info = dirty_i;
1584 mutex_init(&dirty_i->seglist_lock);
1586 bitmap_size = f2fs_bitmap_size(TOTAL_SEGS(sbi));
1588 for (i = 0; i < NR_DIRTY_TYPE; i++) {
1589 dirty_i->dirty_segmap[i] = kzalloc(bitmap_size, GFP_KERNEL);
1590 if (!dirty_i->dirty_segmap[i])
1594 init_dirty_segmap(sbi);
1595 return init_victim_secmap(sbi);
1599 * Update min, max modified time for cost-benefit GC algorithm
1601 static void init_min_max_mtime(struct f2fs_sb_info *sbi)
1603 struct sit_info *sit_i = SIT_I(sbi);
1606 mutex_lock(&sit_i->sentry_lock);
1608 sit_i->min_mtime = LLONG_MAX;
1610 for (segno = 0; segno < TOTAL_SEGS(sbi); segno += sbi->segs_per_sec) {
1612 unsigned long long mtime = 0;
1614 for (i = 0; i < sbi->segs_per_sec; i++)
1615 mtime += get_seg_entry(sbi, segno + i)->mtime;
1617 mtime = div_u64(mtime, sbi->segs_per_sec);
1619 if (sit_i->min_mtime > mtime)
1620 sit_i->min_mtime = mtime;
1622 sit_i->max_mtime = get_mtime(sbi);
1623 mutex_unlock(&sit_i->sentry_lock);
1626 int build_segment_manager(struct f2fs_sb_info *sbi)
1628 struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
1629 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1630 struct f2fs_sm_info *sm_info;
1633 sm_info = kzalloc(sizeof(struct f2fs_sm_info), GFP_KERNEL);
1638 sbi->sm_info = sm_info;
1639 INIT_LIST_HEAD(&sm_info->wblist_head);
1640 spin_lock_init(&sm_info->wblist_lock);
1641 sm_info->seg0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr);
1642 sm_info->main_blkaddr = le32_to_cpu(raw_super->main_blkaddr);
1643 sm_info->segment_count = le32_to_cpu(raw_super->segment_count);
1644 sm_info->reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
1645 sm_info->ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
1646 sm_info->main_segments = le32_to_cpu(raw_super->segment_count_main);
1647 sm_info->ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
1649 err = build_sit_info(sbi);
1652 err = build_free_segmap(sbi);
1655 err = build_curseg(sbi);
1659 /* reinit free segmap based on SIT */
1660 build_sit_entries(sbi);
1662 init_free_segmap(sbi);
1663 err = build_dirty_segmap(sbi);
1667 init_min_max_mtime(sbi);
1671 static void discard_dirty_segmap(struct f2fs_sb_info *sbi,
1672 enum dirty_type dirty_type)
1674 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
1676 mutex_lock(&dirty_i->seglist_lock);
1677 kfree(dirty_i->dirty_segmap[dirty_type]);
1678 dirty_i->nr_dirty[dirty_type] = 0;
1679 mutex_unlock(&dirty_i->seglist_lock);
1682 static void destroy_victim_secmap(struct f2fs_sb_info *sbi)
1684 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
1685 kfree(dirty_i->victim_secmap);
1688 static void destroy_dirty_segmap(struct f2fs_sb_info *sbi)
1690 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
1696 /* discard pre-free/dirty segments list */
1697 for (i = 0; i < NR_DIRTY_TYPE; i++)
1698 discard_dirty_segmap(sbi, i);
1700 destroy_victim_secmap(sbi);
1701 SM_I(sbi)->dirty_info = NULL;
1705 static void destroy_curseg(struct f2fs_sb_info *sbi)
1707 struct curseg_info *array = SM_I(sbi)->curseg_array;
1712 SM_I(sbi)->curseg_array = NULL;
1713 for (i = 0; i < NR_CURSEG_TYPE; i++)
1714 kfree(array[i].sum_blk);
1718 static void destroy_free_segmap(struct f2fs_sb_info *sbi)
1720 struct free_segmap_info *free_i = SM_I(sbi)->free_info;
1723 SM_I(sbi)->free_info = NULL;
1724 kfree(free_i->free_segmap);
1725 kfree(free_i->free_secmap);
1729 static void destroy_sit_info(struct f2fs_sb_info *sbi)
1731 struct sit_info *sit_i = SIT_I(sbi);
1737 if (sit_i->sentries) {
1738 for (start = 0; start < TOTAL_SEGS(sbi); start++) {
1739 kfree(sit_i->sentries[start].cur_valid_map);
1740 kfree(sit_i->sentries[start].ckpt_valid_map);
1743 vfree(sit_i->sentries);
1744 vfree(sit_i->sec_entries);
1745 kfree(sit_i->dirty_sentries_bitmap);
1747 SM_I(sbi)->sit_info = NULL;
1748 kfree(sit_i->sit_bitmap);
1752 void destroy_segment_manager(struct f2fs_sb_info *sbi)
1754 struct f2fs_sm_info *sm_info = SM_I(sbi);
1755 destroy_dirty_segmap(sbi);
1756 destroy_curseg(sbi);
1757 destroy_free_segmap(sbi);
1758 destroy_sit_info(sbi);
1759 sbi->sm_info = NULL;