1 // SPDX-License-Identifier: GPL-2.0
5 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
6 * http://www.samsung.com/
9 #include <linux/f2fs_fs.h>
10 #include <linux/bio.h>
11 #include <linux/blkdev.h>
12 #include <linux/prefetch.h>
13 #include <linux/kthread.h>
14 #include <linux/swap.h>
15 #include <linux/timer.h>
16 #include <linux/freezer.h>
17 #include <linux/sched/signal.h>
24 #include <trace/events/f2fs.h>
26 #define __reverse_ffz(x) __reverse_ffs(~(x))
28 static struct kmem_cache *discard_entry_slab;
29 static struct kmem_cache *discard_cmd_slab;
30 static struct kmem_cache *sit_entry_set_slab;
31 static struct kmem_cache *inmem_entry_slab;
33 static unsigned long __reverse_ulong(unsigned char *str)
35 unsigned long tmp = 0;
36 int shift = 24, idx = 0;
38 #if BITS_PER_LONG == 64
42 tmp |= (unsigned long)str[idx++] << shift;
43 shift -= BITS_PER_BYTE;
49 * __reverse_ffs is copied from include/asm-generic/bitops/__ffs.h since
50 * MSB and LSB are reversed in a byte by f2fs_set_bit.
52 static inline unsigned long __reverse_ffs(unsigned long word)
56 #if BITS_PER_LONG == 64
57 if ((word & 0xffffffff00000000UL) == 0)
62 if ((word & 0xffff0000) == 0)
67 if ((word & 0xff00) == 0)
72 if ((word & 0xf0) == 0)
77 if ((word & 0xc) == 0)
82 if ((word & 0x2) == 0)
88 * __find_rev_next(_zero)_bit is copied from lib/find_next_bit.c because
89 * f2fs_set_bit makes MSB and LSB reversed in a byte.
90 * @size must be integral times of unsigned long.
93 * f2fs_set_bit(0, bitmap) => 1000 0000
94 * f2fs_set_bit(7, bitmap) => 0000 0001
96 static unsigned long __find_rev_next_bit(const unsigned long *addr,
97 unsigned long size, unsigned long offset)
99 const unsigned long *p = addr + BIT_WORD(offset);
100 unsigned long result = size;
106 size -= (offset & ~(BITS_PER_LONG - 1));
107 offset %= BITS_PER_LONG;
113 tmp = __reverse_ulong((unsigned char *)p);
115 tmp &= ~0UL >> offset;
116 if (size < BITS_PER_LONG)
117 tmp &= (~0UL << (BITS_PER_LONG - size));
121 if (size <= BITS_PER_LONG)
123 size -= BITS_PER_LONG;
129 return result - size + __reverse_ffs(tmp);
132 static unsigned long __find_rev_next_zero_bit(const unsigned long *addr,
133 unsigned long size, unsigned long offset)
135 const unsigned long *p = addr + BIT_WORD(offset);
136 unsigned long result = size;
142 size -= (offset & ~(BITS_PER_LONG - 1));
143 offset %= BITS_PER_LONG;
149 tmp = __reverse_ulong((unsigned char *)p);
152 tmp |= ~0UL << (BITS_PER_LONG - offset);
153 if (size < BITS_PER_LONG)
158 if (size <= BITS_PER_LONG)
160 size -= BITS_PER_LONG;
166 return result - size + __reverse_ffz(tmp);
169 bool f2fs_need_SSR(struct f2fs_sb_info *sbi)
171 int node_secs = get_blocktype_secs(sbi, F2FS_DIRTY_NODES);
172 int dent_secs = get_blocktype_secs(sbi, F2FS_DIRTY_DENTS);
173 int imeta_secs = get_blocktype_secs(sbi, F2FS_DIRTY_IMETA);
175 if (f2fs_lfs_mode(sbi))
177 if (sbi->gc_mode == GC_URGENT_HIGH)
179 if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
182 return free_sections(sbi) <= (node_secs + 2 * dent_secs + imeta_secs +
183 SM_I(sbi)->min_ssr_sections + reserved_sections(sbi));
186 void f2fs_register_inmem_page(struct inode *inode, struct page *page)
188 struct inmem_pages *new;
190 set_page_private_atomic(page);
192 new = f2fs_kmem_cache_alloc(inmem_entry_slab,
193 GFP_NOFS, true, NULL);
195 /* add atomic page indices to the list */
197 INIT_LIST_HEAD(&new->list);
199 /* increase reference count with clean state */
201 mutex_lock(&F2FS_I(inode)->inmem_lock);
202 list_add_tail(&new->list, &F2FS_I(inode)->inmem_pages);
203 inc_page_count(F2FS_I_SB(inode), F2FS_INMEM_PAGES);
204 mutex_unlock(&F2FS_I(inode)->inmem_lock);
206 trace_f2fs_register_inmem_page(page, INMEM);
209 static int __revoke_inmem_pages(struct inode *inode,
210 struct list_head *head, bool drop, bool recover,
213 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
214 struct inmem_pages *cur, *tmp;
217 list_for_each_entry_safe(cur, tmp, head, list) {
218 struct page *page = cur->page;
221 trace_f2fs_commit_inmem_page(page, INMEM_DROP);
225 * to avoid deadlock in between page lock and
228 if (!trylock_page(page))
234 f2fs_wait_on_page_writeback(page, DATA, true, true);
237 struct dnode_of_data dn;
240 trace_f2fs_commit_inmem_page(page, INMEM_REVOKE);
242 set_new_dnode(&dn, inode, NULL, NULL, 0);
243 err = f2fs_get_dnode_of_data(&dn, page->index,
246 if (err == -ENOMEM) {
247 congestion_wait(BLK_RW_ASYNC,
256 err = f2fs_get_node_info(sbi, dn.nid, &ni);
262 if (cur->old_addr == NEW_ADDR) {
263 f2fs_invalidate_blocks(sbi, dn.data_blkaddr);
264 f2fs_update_data_blkaddr(&dn, NEW_ADDR);
266 f2fs_replace_block(sbi, &dn, dn.data_blkaddr,
267 cur->old_addr, ni.version, true, true);
271 /* we don't need to invalidate this in the sccessful status */
272 if (drop || recover) {
273 ClearPageUptodate(page);
274 clear_page_private_gcing(page);
276 detach_page_private(page);
277 set_page_private(page, 0);
278 f2fs_put_page(page, 1);
280 list_del(&cur->list);
281 kmem_cache_free(inmem_entry_slab, cur);
282 dec_page_count(F2FS_I_SB(inode), F2FS_INMEM_PAGES);
287 void f2fs_drop_inmem_pages_all(struct f2fs_sb_info *sbi, bool gc_failure)
289 struct list_head *head = &sbi->inode_list[ATOMIC_FILE];
291 struct f2fs_inode_info *fi;
292 unsigned int count = sbi->atomic_files;
293 unsigned int looped = 0;
295 spin_lock(&sbi->inode_lock[ATOMIC_FILE]);
296 if (list_empty(head)) {
297 spin_unlock(&sbi->inode_lock[ATOMIC_FILE]);
300 fi = list_first_entry(head, struct f2fs_inode_info, inmem_ilist);
301 inode = igrab(&fi->vfs_inode);
303 list_move_tail(&fi->inmem_ilist, head);
304 spin_unlock(&sbi->inode_lock[ATOMIC_FILE]);
308 if (!fi->i_gc_failures[GC_FAILURE_ATOMIC])
311 set_inode_flag(inode, FI_ATOMIC_REVOKE_REQUEST);
312 f2fs_drop_inmem_pages(inode);
316 congestion_wait(BLK_RW_ASYNC, DEFAULT_IO_TIMEOUT);
319 if (++looped >= count)
325 void f2fs_drop_inmem_pages(struct inode *inode)
327 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
328 struct f2fs_inode_info *fi = F2FS_I(inode);
331 mutex_lock(&fi->inmem_lock);
332 if (list_empty(&fi->inmem_pages)) {
333 fi->i_gc_failures[GC_FAILURE_ATOMIC] = 0;
335 spin_lock(&sbi->inode_lock[ATOMIC_FILE]);
336 if (!list_empty(&fi->inmem_ilist))
337 list_del_init(&fi->inmem_ilist);
338 if (f2fs_is_atomic_file(inode)) {
339 clear_inode_flag(inode, FI_ATOMIC_FILE);
342 spin_unlock(&sbi->inode_lock[ATOMIC_FILE]);
344 mutex_unlock(&fi->inmem_lock);
347 __revoke_inmem_pages(inode, &fi->inmem_pages,
349 mutex_unlock(&fi->inmem_lock);
353 void f2fs_drop_inmem_page(struct inode *inode, struct page *page)
355 struct f2fs_inode_info *fi = F2FS_I(inode);
356 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
357 struct list_head *head = &fi->inmem_pages;
358 struct inmem_pages *cur = NULL;
360 f2fs_bug_on(sbi, !page_private_atomic(page));
362 mutex_lock(&fi->inmem_lock);
363 list_for_each_entry(cur, head, list) {
364 if (cur->page == page)
368 f2fs_bug_on(sbi, list_empty(head) || cur->page != page);
369 list_del(&cur->list);
370 mutex_unlock(&fi->inmem_lock);
372 dec_page_count(sbi, F2FS_INMEM_PAGES);
373 kmem_cache_free(inmem_entry_slab, cur);
375 ClearPageUptodate(page);
376 clear_page_private_atomic(page);
377 f2fs_put_page(page, 0);
379 detach_page_private(page);
380 set_page_private(page, 0);
382 trace_f2fs_commit_inmem_page(page, INMEM_INVALIDATE);
385 static int __f2fs_commit_inmem_pages(struct inode *inode)
387 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
388 struct f2fs_inode_info *fi = F2FS_I(inode);
389 struct inmem_pages *cur, *tmp;
390 struct f2fs_io_info fio = {
395 .op_flags = REQ_SYNC | REQ_PRIO,
396 .io_type = FS_DATA_IO,
398 struct list_head revoke_list;
399 bool submit_bio = false;
402 INIT_LIST_HEAD(&revoke_list);
404 list_for_each_entry_safe(cur, tmp, &fi->inmem_pages, list) {
405 struct page *page = cur->page;
408 if (page->mapping == inode->i_mapping) {
409 trace_f2fs_commit_inmem_page(page, INMEM);
411 f2fs_wait_on_page_writeback(page, DATA, true, true);
413 set_page_dirty(page);
414 if (clear_page_dirty_for_io(page)) {
415 inode_dec_dirty_pages(inode);
416 f2fs_remove_dirty_inode(inode);
420 fio.old_blkaddr = NULL_ADDR;
421 fio.encrypted_page = NULL;
422 fio.need_lock = LOCK_DONE;
423 err = f2fs_do_write_data_page(&fio);
425 if (err == -ENOMEM) {
426 congestion_wait(BLK_RW_ASYNC,
434 /* record old blkaddr for revoking */
435 cur->old_addr = fio.old_blkaddr;
439 list_move_tail(&cur->list, &revoke_list);
443 f2fs_submit_merged_write_cond(sbi, inode, NULL, 0, DATA);
447 * try to revoke all committed pages, but still we could fail
448 * due to no memory or other reason, if that happened, EAGAIN
449 * will be returned, which means in such case, transaction is
450 * already not integrity, caller should use journal to do the
451 * recovery or rewrite & commit last transaction. For other
452 * error number, revoking was done by filesystem itself.
454 err = __revoke_inmem_pages(inode, &revoke_list,
457 /* drop all uncommitted pages */
458 __revoke_inmem_pages(inode, &fi->inmem_pages,
461 __revoke_inmem_pages(inode, &revoke_list,
462 false, false, false);
468 int f2fs_commit_inmem_pages(struct inode *inode)
470 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
471 struct f2fs_inode_info *fi = F2FS_I(inode);
474 f2fs_balance_fs(sbi, true);
476 down_write(&fi->i_gc_rwsem[WRITE]);
479 set_inode_flag(inode, FI_ATOMIC_COMMIT);
481 mutex_lock(&fi->inmem_lock);
482 err = __f2fs_commit_inmem_pages(inode);
483 mutex_unlock(&fi->inmem_lock);
485 clear_inode_flag(inode, FI_ATOMIC_COMMIT);
488 up_write(&fi->i_gc_rwsem[WRITE]);
494 * This function balances dirty node and dentry pages.
495 * In addition, it controls garbage collection.
497 void f2fs_balance_fs(struct f2fs_sb_info *sbi, bool need)
499 if (time_to_inject(sbi, FAULT_CHECKPOINT)) {
500 f2fs_show_injection_info(sbi, FAULT_CHECKPOINT);
501 f2fs_stop_checkpoint(sbi, false);
504 /* balance_fs_bg is able to be pending */
505 if (need && excess_cached_nats(sbi))
506 f2fs_balance_fs_bg(sbi, false);
508 if (!f2fs_is_checkpoint_ready(sbi))
512 * We should do GC or end up with checkpoint, if there are so many dirty
513 * dir/node pages without enough free segments.
515 if (has_not_enough_free_secs(sbi, 0, 0)) {
516 if (test_opt(sbi, GC_MERGE) && sbi->gc_thread &&
517 sbi->gc_thread->f2fs_gc_task) {
520 prepare_to_wait(&sbi->gc_thread->fggc_wq, &wait,
521 TASK_UNINTERRUPTIBLE);
522 wake_up(&sbi->gc_thread->gc_wait_queue_head);
524 finish_wait(&sbi->gc_thread->fggc_wq, &wait);
526 down_write(&sbi->gc_lock);
527 f2fs_gc(sbi, false, false, false, NULL_SEGNO);
532 void f2fs_balance_fs_bg(struct f2fs_sb_info *sbi, bool from_bg)
534 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
537 /* try to shrink extent cache when there is no enough memory */
538 if (!f2fs_available_free_memory(sbi, EXTENT_CACHE))
539 f2fs_shrink_extent_tree(sbi, EXTENT_CACHE_SHRINK_NUMBER);
541 /* check the # of cached NAT entries */
542 if (!f2fs_available_free_memory(sbi, NAT_ENTRIES))
543 f2fs_try_to_free_nats(sbi, NAT_ENTRY_PER_BLOCK);
545 if (!f2fs_available_free_memory(sbi, FREE_NIDS))
546 f2fs_try_to_free_nids(sbi, MAX_FREE_NIDS);
548 f2fs_build_free_nids(sbi, false, false);
550 if (excess_dirty_nats(sbi) || excess_dirty_nodes(sbi) ||
551 excess_prefree_segs(sbi))
554 /* there is background inflight IO or foreground operation recently */
555 if (is_inflight_io(sbi, REQ_TIME) ||
556 (!f2fs_time_over(sbi, REQ_TIME) && rwsem_is_locked(&sbi->cp_rwsem)))
559 /* exceed periodical checkpoint timeout threshold */
560 if (f2fs_time_over(sbi, CP_TIME))
563 /* checkpoint is the only way to shrink partial cached entries */
564 if (f2fs_available_free_memory(sbi, NAT_ENTRIES) ||
565 f2fs_available_free_memory(sbi, INO_ENTRIES))
569 if (test_opt(sbi, DATA_FLUSH) && from_bg) {
570 struct blk_plug plug;
572 mutex_lock(&sbi->flush_lock);
574 blk_start_plug(&plug);
575 f2fs_sync_dirty_inodes(sbi, FILE_INODE);
576 blk_finish_plug(&plug);
578 mutex_unlock(&sbi->flush_lock);
580 f2fs_sync_fs(sbi->sb, true);
581 stat_inc_bg_cp_count(sbi->stat_info);
584 static int __submit_flush_wait(struct f2fs_sb_info *sbi,
585 struct block_device *bdev)
587 int ret = blkdev_issue_flush(bdev);
589 trace_f2fs_issue_flush(bdev, test_opt(sbi, NOBARRIER),
590 test_opt(sbi, FLUSH_MERGE), ret);
594 static int submit_flush_wait(struct f2fs_sb_info *sbi, nid_t ino)
599 if (!f2fs_is_multi_device(sbi))
600 return __submit_flush_wait(sbi, sbi->sb->s_bdev);
602 for (i = 0; i < sbi->s_ndevs; i++) {
603 if (!f2fs_is_dirty_device(sbi, ino, i, FLUSH_INO))
605 ret = __submit_flush_wait(sbi, FDEV(i).bdev);
612 static int issue_flush_thread(void *data)
614 struct f2fs_sb_info *sbi = data;
615 struct flush_cmd_control *fcc = SM_I(sbi)->fcc_info;
616 wait_queue_head_t *q = &fcc->flush_wait_queue;
618 if (kthread_should_stop())
621 if (!llist_empty(&fcc->issue_list)) {
622 struct flush_cmd *cmd, *next;
625 fcc->dispatch_list = llist_del_all(&fcc->issue_list);
626 fcc->dispatch_list = llist_reverse_order(fcc->dispatch_list);
628 cmd = llist_entry(fcc->dispatch_list, struct flush_cmd, llnode);
630 ret = submit_flush_wait(sbi, cmd->ino);
631 atomic_inc(&fcc->issued_flush);
633 llist_for_each_entry_safe(cmd, next,
634 fcc->dispatch_list, llnode) {
636 complete(&cmd->wait);
638 fcc->dispatch_list = NULL;
641 wait_event_interruptible(*q,
642 kthread_should_stop() || !llist_empty(&fcc->issue_list));
646 int f2fs_issue_flush(struct f2fs_sb_info *sbi, nid_t ino)
648 struct flush_cmd_control *fcc = SM_I(sbi)->fcc_info;
649 struct flush_cmd cmd;
652 if (test_opt(sbi, NOBARRIER))
655 if (!test_opt(sbi, FLUSH_MERGE)) {
656 atomic_inc(&fcc->queued_flush);
657 ret = submit_flush_wait(sbi, ino);
658 atomic_dec(&fcc->queued_flush);
659 atomic_inc(&fcc->issued_flush);
663 if (atomic_inc_return(&fcc->queued_flush) == 1 ||
664 f2fs_is_multi_device(sbi)) {
665 ret = submit_flush_wait(sbi, ino);
666 atomic_dec(&fcc->queued_flush);
668 atomic_inc(&fcc->issued_flush);
673 init_completion(&cmd.wait);
675 llist_add(&cmd.llnode, &fcc->issue_list);
678 * update issue_list before we wake up issue_flush thread, this
679 * smp_mb() pairs with another barrier in ___wait_event(), see
680 * more details in comments of waitqueue_active().
684 if (waitqueue_active(&fcc->flush_wait_queue))
685 wake_up(&fcc->flush_wait_queue);
687 if (fcc->f2fs_issue_flush) {
688 wait_for_completion(&cmd.wait);
689 atomic_dec(&fcc->queued_flush);
691 struct llist_node *list;
693 list = llist_del_all(&fcc->issue_list);
695 wait_for_completion(&cmd.wait);
696 atomic_dec(&fcc->queued_flush);
698 struct flush_cmd *tmp, *next;
700 ret = submit_flush_wait(sbi, ino);
702 llist_for_each_entry_safe(tmp, next, list, llnode) {
705 atomic_dec(&fcc->queued_flush);
709 complete(&tmp->wait);
717 int f2fs_create_flush_cmd_control(struct f2fs_sb_info *sbi)
719 dev_t dev = sbi->sb->s_bdev->bd_dev;
720 struct flush_cmd_control *fcc;
723 if (SM_I(sbi)->fcc_info) {
724 fcc = SM_I(sbi)->fcc_info;
725 if (fcc->f2fs_issue_flush)
730 fcc = f2fs_kzalloc(sbi, sizeof(struct flush_cmd_control), GFP_KERNEL);
733 atomic_set(&fcc->issued_flush, 0);
734 atomic_set(&fcc->queued_flush, 0);
735 init_waitqueue_head(&fcc->flush_wait_queue);
736 init_llist_head(&fcc->issue_list);
737 SM_I(sbi)->fcc_info = fcc;
738 if (!test_opt(sbi, FLUSH_MERGE))
742 fcc->f2fs_issue_flush = kthread_run(issue_flush_thread, sbi,
743 "f2fs_flush-%u:%u", MAJOR(dev), MINOR(dev));
744 if (IS_ERR(fcc->f2fs_issue_flush)) {
745 err = PTR_ERR(fcc->f2fs_issue_flush);
747 SM_I(sbi)->fcc_info = NULL;
754 void f2fs_destroy_flush_cmd_control(struct f2fs_sb_info *sbi, bool free)
756 struct flush_cmd_control *fcc = SM_I(sbi)->fcc_info;
758 if (fcc && fcc->f2fs_issue_flush) {
759 struct task_struct *flush_thread = fcc->f2fs_issue_flush;
761 fcc->f2fs_issue_flush = NULL;
762 kthread_stop(flush_thread);
766 SM_I(sbi)->fcc_info = NULL;
770 int f2fs_flush_device_cache(struct f2fs_sb_info *sbi)
774 if (!f2fs_is_multi_device(sbi))
777 if (test_opt(sbi, NOBARRIER))
780 for (i = 1; i < sbi->s_ndevs; i++) {
781 int count = DEFAULT_RETRY_IO_COUNT;
783 if (!f2fs_test_bit(i, (char *)&sbi->dirty_device))
787 ret = __submit_flush_wait(sbi, FDEV(i).bdev);
789 congestion_wait(BLK_RW_ASYNC,
791 } while (ret && --count);
794 f2fs_stop_checkpoint(sbi, false);
798 spin_lock(&sbi->dev_lock);
799 f2fs_clear_bit(i, (char *)&sbi->dirty_device);
800 spin_unlock(&sbi->dev_lock);
806 static void __locate_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno,
807 enum dirty_type dirty_type)
809 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
811 /* need not be added */
812 if (IS_CURSEG(sbi, segno))
815 if (!test_and_set_bit(segno, dirty_i->dirty_segmap[dirty_type]))
816 dirty_i->nr_dirty[dirty_type]++;
818 if (dirty_type == DIRTY) {
819 struct seg_entry *sentry = get_seg_entry(sbi, segno);
820 enum dirty_type t = sentry->type;
822 if (unlikely(t >= DIRTY)) {
826 if (!test_and_set_bit(segno, dirty_i->dirty_segmap[t]))
827 dirty_i->nr_dirty[t]++;
829 if (__is_large_section(sbi)) {
830 unsigned int secno = GET_SEC_FROM_SEG(sbi, segno);
831 block_t valid_blocks =
832 get_valid_blocks(sbi, segno, true);
834 f2fs_bug_on(sbi, unlikely(!valid_blocks ||
835 valid_blocks == BLKS_PER_SEC(sbi)));
837 if (!IS_CURSEC(sbi, secno))
838 set_bit(secno, dirty_i->dirty_secmap);
843 static void __remove_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno,
844 enum dirty_type dirty_type)
846 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
847 block_t valid_blocks;
849 if (test_and_clear_bit(segno, dirty_i->dirty_segmap[dirty_type]))
850 dirty_i->nr_dirty[dirty_type]--;
852 if (dirty_type == DIRTY) {
853 struct seg_entry *sentry = get_seg_entry(sbi, segno);
854 enum dirty_type t = sentry->type;
856 if (test_and_clear_bit(segno, dirty_i->dirty_segmap[t]))
857 dirty_i->nr_dirty[t]--;
859 valid_blocks = get_valid_blocks(sbi, segno, true);
860 if (valid_blocks == 0) {
861 clear_bit(GET_SEC_FROM_SEG(sbi, segno),
862 dirty_i->victim_secmap);
863 #ifdef CONFIG_F2FS_CHECK_FS
864 clear_bit(segno, SIT_I(sbi)->invalid_segmap);
867 if (__is_large_section(sbi)) {
868 unsigned int secno = GET_SEC_FROM_SEG(sbi, segno);
871 valid_blocks == BLKS_PER_SEC(sbi)) {
872 clear_bit(secno, dirty_i->dirty_secmap);
876 if (!IS_CURSEC(sbi, secno))
877 set_bit(secno, dirty_i->dirty_secmap);
883 * Should not occur error such as -ENOMEM.
884 * Adding dirty entry into seglist is not critical operation.
885 * If a given segment is one of current working segments, it won't be added.
887 static void locate_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno)
889 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
890 unsigned short valid_blocks, ckpt_valid_blocks;
891 unsigned int usable_blocks;
893 if (segno == NULL_SEGNO || IS_CURSEG(sbi, segno))
896 usable_blocks = f2fs_usable_blks_in_seg(sbi, segno);
897 mutex_lock(&dirty_i->seglist_lock);
899 valid_blocks = get_valid_blocks(sbi, segno, false);
900 ckpt_valid_blocks = get_ckpt_valid_blocks(sbi, segno, false);
902 if (valid_blocks == 0 && (!is_sbi_flag_set(sbi, SBI_CP_DISABLED) ||
903 ckpt_valid_blocks == usable_blocks)) {
904 __locate_dirty_segment(sbi, segno, PRE);
905 __remove_dirty_segment(sbi, segno, DIRTY);
906 } else if (valid_blocks < usable_blocks) {
907 __locate_dirty_segment(sbi, segno, DIRTY);
909 /* Recovery routine with SSR needs this */
910 __remove_dirty_segment(sbi, segno, DIRTY);
913 mutex_unlock(&dirty_i->seglist_lock);
916 /* This moves currently empty dirty blocks to prefree. Must hold seglist_lock */
917 void f2fs_dirty_to_prefree(struct f2fs_sb_info *sbi)
919 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
922 mutex_lock(&dirty_i->seglist_lock);
923 for_each_set_bit(segno, dirty_i->dirty_segmap[DIRTY], MAIN_SEGS(sbi)) {
924 if (get_valid_blocks(sbi, segno, false))
926 if (IS_CURSEG(sbi, segno))
928 __locate_dirty_segment(sbi, segno, PRE);
929 __remove_dirty_segment(sbi, segno, DIRTY);
931 mutex_unlock(&dirty_i->seglist_lock);
934 block_t f2fs_get_unusable_blocks(struct f2fs_sb_info *sbi)
937 (overprovision_segments(sbi) - reserved_segments(sbi));
938 block_t ovp_holes = ovp_hole_segs << sbi->log_blocks_per_seg;
939 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
940 block_t holes[2] = {0, 0}; /* DATA and NODE */
942 struct seg_entry *se;
945 mutex_lock(&dirty_i->seglist_lock);
946 for_each_set_bit(segno, dirty_i->dirty_segmap[DIRTY], MAIN_SEGS(sbi)) {
947 se = get_seg_entry(sbi, segno);
948 if (IS_NODESEG(se->type))
949 holes[NODE] += f2fs_usable_blks_in_seg(sbi, segno) -
952 holes[DATA] += f2fs_usable_blks_in_seg(sbi, segno) -
955 mutex_unlock(&dirty_i->seglist_lock);
957 unusable = holes[DATA] > holes[NODE] ? holes[DATA] : holes[NODE];
958 if (unusable > ovp_holes)
959 return unusable - ovp_holes;
963 int f2fs_disable_cp_again(struct f2fs_sb_info *sbi, block_t unusable)
966 (overprovision_segments(sbi) - reserved_segments(sbi));
967 if (unusable > F2FS_OPTION(sbi).unusable_cap)
969 if (is_sbi_flag_set(sbi, SBI_CP_DISABLED_QUICK) &&
970 dirty_segments(sbi) > ovp_hole_segs)
975 /* This is only used by SBI_CP_DISABLED */
976 static unsigned int get_free_segment(struct f2fs_sb_info *sbi)
978 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
979 unsigned int segno = 0;
981 mutex_lock(&dirty_i->seglist_lock);
982 for_each_set_bit(segno, dirty_i->dirty_segmap[DIRTY], MAIN_SEGS(sbi)) {
983 if (get_valid_blocks(sbi, segno, false))
985 if (get_ckpt_valid_blocks(sbi, segno, false))
987 mutex_unlock(&dirty_i->seglist_lock);
990 mutex_unlock(&dirty_i->seglist_lock);
994 static struct discard_cmd *__create_discard_cmd(struct f2fs_sb_info *sbi,
995 struct block_device *bdev, block_t lstart,
996 block_t start, block_t len)
998 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
999 struct list_head *pend_list;
1000 struct discard_cmd *dc;
1002 f2fs_bug_on(sbi, !len);
1004 pend_list = &dcc->pend_list[plist_idx(len)];
1006 dc = f2fs_kmem_cache_alloc(discard_cmd_slab, GFP_NOFS, true, NULL);
1007 INIT_LIST_HEAD(&dc->list);
1009 dc->lstart = lstart;
1016 init_completion(&dc->wait);
1017 list_add_tail(&dc->list, pend_list);
1018 spin_lock_init(&dc->lock);
1020 atomic_inc(&dcc->discard_cmd_cnt);
1021 dcc->undiscard_blks += len;
1026 static struct discard_cmd *__attach_discard_cmd(struct f2fs_sb_info *sbi,
1027 struct block_device *bdev, block_t lstart,
1028 block_t start, block_t len,
1029 struct rb_node *parent, struct rb_node **p,
1032 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
1033 struct discard_cmd *dc;
1035 dc = __create_discard_cmd(sbi, bdev, lstart, start, len);
1037 rb_link_node(&dc->rb_node, parent, p);
1038 rb_insert_color_cached(&dc->rb_node, &dcc->root, leftmost);
1043 static void __detach_discard_cmd(struct discard_cmd_control *dcc,
1044 struct discard_cmd *dc)
1046 if (dc->state == D_DONE)
1047 atomic_sub(dc->queued, &dcc->queued_discard);
1049 list_del(&dc->list);
1050 rb_erase_cached(&dc->rb_node, &dcc->root);
1051 dcc->undiscard_blks -= dc->len;
1053 kmem_cache_free(discard_cmd_slab, dc);
1055 atomic_dec(&dcc->discard_cmd_cnt);
1058 static void __remove_discard_cmd(struct f2fs_sb_info *sbi,
1059 struct discard_cmd *dc)
1061 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
1062 unsigned long flags;
1064 trace_f2fs_remove_discard(dc->bdev, dc->start, dc->len);
1066 spin_lock_irqsave(&dc->lock, flags);
1068 spin_unlock_irqrestore(&dc->lock, flags);
1071 spin_unlock_irqrestore(&dc->lock, flags);
1073 f2fs_bug_on(sbi, dc->ref);
1075 if (dc->error == -EOPNOTSUPP)
1080 "%sF2FS-fs (%s): Issue discard(%u, %u, %u) failed, ret: %d",
1081 KERN_INFO, sbi->sb->s_id,
1082 dc->lstart, dc->start, dc->len, dc->error);
1083 __detach_discard_cmd(dcc, dc);
1086 static void f2fs_submit_discard_endio(struct bio *bio)
1088 struct discard_cmd *dc = (struct discard_cmd *)bio->bi_private;
1089 unsigned long flags;
1091 spin_lock_irqsave(&dc->lock, flags);
1093 dc->error = blk_status_to_errno(bio->bi_status);
1095 if (!dc->bio_ref && dc->state == D_SUBMIT) {
1097 complete_all(&dc->wait);
1099 spin_unlock_irqrestore(&dc->lock, flags);
1103 static void __check_sit_bitmap(struct f2fs_sb_info *sbi,
1104 block_t start, block_t end)
1106 #ifdef CONFIG_F2FS_CHECK_FS
1107 struct seg_entry *sentry;
1109 block_t blk = start;
1110 unsigned long offset, size, max_blocks = sbi->blocks_per_seg;
1114 segno = GET_SEGNO(sbi, blk);
1115 sentry = get_seg_entry(sbi, segno);
1116 offset = GET_BLKOFF_FROM_SEG0(sbi, blk);
1118 if (end < START_BLOCK(sbi, segno + 1))
1119 size = GET_BLKOFF_FROM_SEG0(sbi, end);
1122 map = (unsigned long *)(sentry->cur_valid_map);
1123 offset = __find_rev_next_bit(map, size, offset);
1124 f2fs_bug_on(sbi, offset != size);
1125 blk = START_BLOCK(sbi, segno + 1);
1130 static void __init_discard_policy(struct f2fs_sb_info *sbi,
1131 struct discard_policy *dpolicy,
1132 int discard_type, unsigned int granularity)
1134 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
1137 dpolicy->type = discard_type;
1138 dpolicy->sync = true;
1139 dpolicy->ordered = false;
1140 dpolicy->granularity = granularity;
1142 dpolicy->max_requests = DEF_MAX_DISCARD_REQUEST;
1143 dpolicy->io_aware_gran = MAX_PLIST_NUM;
1144 dpolicy->timeout = false;
1146 if (discard_type == DPOLICY_BG) {
1147 dpolicy->min_interval = DEF_MIN_DISCARD_ISSUE_TIME;
1148 dpolicy->mid_interval = DEF_MID_DISCARD_ISSUE_TIME;
1149 dpolicy->max_interval = DEF_MAX_DISCARD_ISSUE_TIME;
1150 dpolicy->io_aware = true;
1151 dpolicy->sync = false;
1152 dpolicy->ordered = true;
1153 if (utilization(sbi) > DEF_DISCARD_URGENT_UTIL) {
1154 dpolicy->granularity = 1;
1155 if (atomic_read(&dcc->discard_cmd_cnt))
1156 dpolicy->max_interval =
1157 DEF_MIN_DISCARD_ISSUE_TIME;
1159 } else if (discard_type == DPOLICY_FORCE) {
1160 dpolicy->min_interval = DEF_MIN_DISCARD_ISSUE_TIME;
1161 dpolicy->mid_interval = DEF_MID_DISCARD_ISSUE_TIME;
1162 dpolicy->max_interval = DEF_MAX_DISCARD_ISSUE_TIME;
1163 dpolicy->io_aware = false;
1164 } else if (discard_type == DPOLICY_FSTRIM) {
1165 dpolicy->io_aware = false;
1166 } else if (discard_type == DPOLICY_UMOUNT) {
1167 dpolicy->io_aware = false;
1168 /* we need to issue all to keep CP_TRIMMED_FLAG */
1169 dpolicy->granularity = 1;
1170 dpolicy->timeout = true;
1174 static void __update_discard_tree_range(struct f2fs_sb_info *sbi,
1175 struct block_device *bdev, block_t lstart,
1176 block_t start, block_t len);
1177 /* this function is copied from blkdev_issue_discard from block/blk-lib.c */
1178 static int __submit_discard_cmd(struct f2fs_sb_info *sbi,
1179 struct discard_policy *dpolicy,
1180 struct discard_cmd *dc,
1181 unsigned int *issued)
1183 struct block_device *bdev = dc->bdev;
1184 struct request_queue *q = bdev_get_queue(bdev);
1185 unsigned int max_discard_blocks =
1186 SECTOR_TO_BLOCK(q->limits.max_discard_sectors);
1187 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
1188 struct list_head *wait_list = (dpolicy->type == DPOLICY_FSTRIM) ?
1189 &(dcc->fstrim_list) : &(dcc->wait_list);
1190 int flag = dpolicy->sync ? REQ_SYNC : 0;
1191 block_t lstart, start, len, total_len;
1194 if (dc->state != D_PREP)
1197 if (is_sbi_flag_set(sbi, SBI_NEED_FSCK))
1200 trace_f2fs_issue_discard(bdev, dc->start, dc->len);
1202 lstart = dc->lstart;
1209 while (total_len && *issued < dpolicy->max_requests && !err) {
1210 struct bio *bio = NULL;
1211 unsigned long flags;
1214 if (len > max_discard_blocks) {
1215 len = max_discard_blocks;
1220 if (*issued == dpolicy->max_requests)
1225 if (time_to_inject(sbi, FAULT_DISCARD)) {
1226 f2fs_show_injection_info(sbi, FAULT_DISCARD);
1230 err = __blkdev_issue_discard(bdev,
1231 SECTOR_FROM_BLOCK(start),
1232 SECTOR_FROM_BLOCK(len),
1236 spin_lock_irqsave(&dc->lock, flags);
1237 if (dc->state == D_PARTIAL)
1238 dc->state = D_SUBMIT;
1239 spin_unlock_irqrestore(&dc->lock, flags);
1244 f2fs_bug_on(sbi, !bio);
1247 * should keep before submission to avoid D_DONE
1250 spin_lock_irqsave(&dc->lock, flags);
1252 dc->state = D_SUBMIT;
1254 dc->state = D_PARTIAL;
1256 spin_unlock_irqrestore(&dc->lock, flags);
1258 atomic_inc(&dcc->queued_discard);
1260 list_move_tail(&dc->list, wait_list);
1262 /* sanity check on discard range */
1263 __check_sit_bitmap(sbi, lstart, lstart + len);
1265 bio->bi_private = dc;
1266 bio->bi_end_io = f2fs_submit_discard_endio;
1267 bio->bi_opf |= flag;
1270 atomic_inc(&dcc->issued_discard);
1272 f2fs_update_iostat(sbi, FS_DISCARD, 1);
1281 dcc->undiscard_blks -= len;
1282 __update_discard_tree_range(sbi, bdev, lstart, start, len);
1287 static void __insert_discard_tree(struct f2fs_sb_info *sbi,
1288 struct block_device *bdev, block_t lstart,
1289 block_t start, block_t len,
1290 struct rb_node **insert_p,
1291 struct rb_node *insert_parent)
1293 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
1295 struct rb_node *parent = NULL;
1296 bool leftmost = true;
1298 if (insert_p && insert_parent) {
1299 parent = insert_parent;
1304 p = f2fs_lookup_rb_tree_for_insert(sbi, &dcc->root, &parent,
1307 __attach_discard_cmd(sbi, bdev, lstart, start, len, parent,
1311 static void __relocate_discard_cmd(struct discard_cmd_control *dcc,
1312 struct discard_cmd *dc)
1314 list_move_tail(&dc->list, &dcc->pend_list[plist_idx(dc->len)]);
1317 static void __punch_discard_cmd(struct f2fs_sb_info *sbi,
1318 struct discard_cmd *dc, block_t blkaddr)
1320 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
1321 struct discard_info di = dc->di;
1322 bool modified = false;
1324 if (dc->state == D_DONE || dc->len == 1) {
1325 __remove_discard_cmd(sbi, dc);
1329 dcc->undiscard_blks -= di.len;
1331 if (blkaddr > di.lstart) {
1332 dc->len = blkaddr - dc->lstart;
1333 dcc->undiscard_blks += dc->len;
1334 __relocate_discard_cmd(dcc, dc);
1338 if (blkaddr < di.lstart + di.len - 1) {
1340 __insert_discard_tree(sbi, dc->bdev, blkaddr + 1,
1341 di.start + blkaddr + 1 - di.lstart,
1342 di.lstart + di.len - 1 - blkaddr,
1348 dcc->undiscard_blks += dc->len;
1349 __relocate_discard_cmd(dcc, dc);
1354 static void __update_discard_tree_range(struct f2fs_sb_info *sbi,
1355 struct block_device *bdev, block_t lstart,
1356 block_t start, block_t len)
1358 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
1359 struct discard_cmd *prev_dc = NULL, *next_dc = NULL;
1360 struct discard_cmd *dc;
1361 struct discard_info di = {0};
1362 struct rb_node **insert_p = NULL, *insert_parent = NULL;
1363 struct request_queue *q = bdev_get_queue(bdev);
1364 unsigned int max_discard_blocks =
1365 SECTOR_TO_BLOCK(q->limits.max_discard_sectors);
1366 block_t end = lstart + len;
1368 dc = (struct discard_cmd *)f2fs_lookup_rb_tree_ret(&dcc->root,
1370 (struct rb_entry **)&prev_dc,
1371 (struct rb_entry **)&next_dc,
1372 &insert_p, &insert_parent, true, NULL);
1378 di.len = next_dc ? next_dc->lstart - lstart : len;
1379 di.len = min(di.len, len);
1384 struct rb_node *node;
1385 bool merged = false;
1386 struct discard_cmd *tdc = NULL;
1389 di.lstart = prev_dc->lstart + prev_dc->len;
1390 if (di.lstart < lstart)
1392 if (di.lstart >= end)
1395 if (!next_dc || next_dc->lstart > end)
1396 di.len = end - di.lstart;
1398 di.len = next_dc->lstart - di.lstart;
1399 di.start = start + di.lstart - lstart;
1405 if (prev_dc && prev_dc->state == D_PREP &&
1406 prev_dc->bdev == bdev &&
1407 __is_discard_back_mergeable(&di, &prev_dc->di,
1408 max_discard_blocks)) {
1409 prev_dc->di.len += di.len;
1410 dcc->undiscard_blks += di.len;
1411 __relocate_discard_cmd(dcc, prev_dc);
1417 if (next_dc && next_dc->state == D_PREP &&
1418 next_dc->bdev == bdev &&
1419 __is_discard_front_mergeable(&di, &next_dc->di,
1420 max_discard_blocks)) {
1421 next_dc->di.lstart = di.lstart;
1422 next_dc->di.len += di.len;
1423 next_dc->di.start = di.start;
1424 dcc->undiscard_blks += di.len;
1425 __relocate_discard_cmd(dcc, next_dc);
1427 __remove_discard_cmd(sbi, tdc);
1432 __insert_discard_tree(sbi, bdev, di.lstart, di.start,
1433 di.len, NULL, NULL);
1440 node = rb_next(&prev_dc->rb_node);
1441 next_dc = rb_entry_safe(node, struct discard_cmd, rb_node);
1445 static int __queue_discard_cmd(struct f2fs_sb_info *sbi,
1446 struct block_device *bdev, block_t blkstart, block_t blklen)
1448 block_t lblkstart = blkstart;
1450 if (!f2fs_bdev_support_discard(bdev))
1453 trace_f2fs_queue_discard(bdev, blkstart, blklen);
1455 if (f2fs_is_multi_device(sbi)) {
1456 int devi = f2fs_target_device_index(sbi, blkstart);
1458 blkstart -= FDEV(devi).start_blk;
1460 mutex_lock(&SM_I(sbi)->dcc_info->cmd_lock);
1461 __update_discard_tree_range(sbi, bdev, lblkstart, blkstart, blklen);
1462 mutex_unlock(&SM_I(sbi)->dcc_info->cmd_lock);
1466 static unsigned int __issue_discard_cmd_orderly(struct f2fs_sb_info *sbi,
1467 struct discard_policy *dpolicy)
1469 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
1470 struct discard_cmd *prev_dc = NULL, *next_dc = NULL;
1471 struct rb_node **insert_p = NULL, *insert_parent = NULL;
1472 struct discard_cmd *dc;
1473 struct blk_plug plug;
1474 unsigned int pos = dcc->next_pos;
1475 unsigned int issued = 0;
1476 bool io_interrupted = false;
1478 mutex_lock(&dcc->cmd_lock);
1479 dc = (struct discard_cmd *)f2fs_lookup_rb_tree_ret(&dcc->root,
1481 (struct rb_entry **)&prev_dc,
1482 (struct rb_entry **)&next_dc,
1483 &insert_p, &insert_parent, true, NULL);
1487 blk_start_plug(&plug);
1490 struct rb_node *node;
1493 if (dc->state != D_PREP)
1496 if (dpolicy->io_aware && !is_idle(sbi, DISCARD_TIME)) {
1497 io_interrupted = true;
1501 dcc->next_pos = dc->lstart + dc->len;
1502 err = __submit_discard_cmd(sbi, dpolicy, dc, &issued);
1504 if (issued >= dpolicy->max_requests)
1507 node = rb_next(&dc->rb_node);
1509 __remove_discard_cmd(sbi, dc);
1510 dc = rb_entry_safe(node, struct discard_cmd, rb_node);
1513 blk_finish_plug(&plug);
1518 mutex_unlock(&dcc->cmd_lock);
1520 if (!issued && io_interrupted)
1525 static unsigned int __wait_all_discard_cmd(struct f2fs_sb_info *sbi,
1526 struct discard_policy *dpolicy);
1528 static int __issue_discard_cmd(struct f2fs_sb_info *sbi,
1529 struct discard_policy *dpolicy)
1531 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
1532 struct list_head *pend_list;
1533 struct discard_cmd *dc, *tmp;
1534 struct blk_plug plug;
1536 bool io_interrupted = false;
1538 if (dpolicy->timeout)
1539 f2fs_update_time(sbi, UMOUNT_DISCARD_TIMEOUT);
1543 for (i = MAX_PLIST_NUM - 1; i >= 0; i--) {
1544 if (dpolicy->timeout &&
1545 f2fs_time_over(sbi, UMOUNT_DISCARD_TIMEOUT))
1548 if (i + 1 < dpolicy->granularity)
1551 if (i < DEFAULT_DISCARD_GRANULARITY && dpolicy->ordered)
1552 return __issue_discard_cmd_orderly(sbi, dpolicy);
1554 pend_list = &dcc->pend_list[i];
1556 mutex_lock(&dcc->cmd_lock);
1557 if (list_empty(pend_list))
1559 if (unlikely(dcc->rbtree_check))
1560 f2fs_bug_on(sbi, !f2fs_check_rb_tree_consistence(sbi,
1561 &dcc->root, false));
1562 blk_start_plug(&plug);
1563 list_for_each_entry_safe(dc, tmp, pend_list, list) {
1564 f2fs_bug_on(sbi, dc->state != D_PREP);
1566 if (dpolicy->timeout &&
1567 f2fs_time_over(sbi, UMOUNT_DISCARD_TIMEOUT))
1570 if (dpolicy->io_aware && i < dpolicy->io_aware_gran &&
1571 !is_idle(sbi, DISCARD_TIME)) {
1572 io_interrupted = true;
1576 __submit_discard_cmd(sbi, dpolicy, dc, &issued);
1578 if (issued >= dpolicy->max_requests)
1581 blk_finish_plug(&plug);
1583 mutex_unlock(&dcc->cmd_lock);
1585 if (issued >= dpolicy->max_requests || io_interrupted)
1589 if (dpolicy->type == DPOLICY_UMOUNT && issued) {
1590 __wait_all_discard_cmd(sbi, dpolicy);
1594 if (!issued && io_interrupted)
1600 static bool __drop_discard_cmd(struct f2fs_sb_info *sbi)
1602 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
1603 struct list_head *pend_list;
1604 struct discard_cmd *dc, *tmp;
1606 bool dropped = false;
1608 mutex_lock(&dcc->cmd_lock);
1609 for (i = MAX_PLIST_NUM - 1; i >= 0; i--) {
1610 pend_list = &dcc->pend_list[i];
1611 list_for_each_entry_safe(dc, tmp, pend_list, list) {
1612 f2fs_bug_on(sbi, dc->state != D_PREP);
1613 __remove_discard_cmd(sbi, dc);
1617 mutex_unlock(&dcc->cmd_lock);
1622 void f2fs_drop_discard_cmd(struct f2fs_sb_info *sbi)
1624 __drop_discard_cmd(sbi);
1627 static unsigned int __wait_one_discard_bio(struct f2fs_sb_info *sbi,
1628 struct discard_cmd *dc)
1630 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
1631 unsigned int len = 0;
1633 wait_for_completion_io(&dc->wait);
1634 mutex_lock(&dcc->cmd_lock);
1635 f2fs_bug_on(sbi, dc->state != D_DONE);
1640 __remove_discard_cmd(sbi, dc);
1642 mutex_unlock(&dcc->cmd_lock);
1647 static unsigned int __wait_discard_cmd_range(struct f2fs_sb_info *sbi,
1648 struct discard_policy *dpolicy,
1649 block_t start, block_t end)
1651 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
1652 struct list_head *wait_list = (dpolicy->type == DPOLICY_FSTRIM) ?
1653 &(dcc->fstrim_list) : &(dcc->wait_list);
1654 struct discard_cmd *dc, *tmp;
1656 unsigned int trimmed = 0;
1661 mutex_lock(&dcc->cmd_lock);
1662 list_for_each_entry_safe(dc, tmp, wait_list, list) {
1663 if (dc->lstart + dc->len <= start || end <= dc->lstart)
1665 if (dc->len < dpolicy->granularity)
1667 if (dc->state == D_DONE && !dc->ref) {
1668 wait_for_completion_io(&dc->wait);
1671 __remove_discard_cmd(sbi, dc);
1678 mutex_unlock(&dcc->cmd_lock);
1681 trimmed += __wait_one_discard_bio(sbi, dc);
1688 static unsigned int __wait_all_discard_cmd(struct f2fs_sb_info *sbi,
1689 struct discard_policy *dpolicy)
1691 struct discard_policy dp;
1692 unsigned int discard_blks;
1695 return __wait_discard_cmd_range(sbi, dpolicy, 0, UINT_MAX);
1698 __init_discard_policy(sbi, &dp, DPOLICY_FSTRIM, 1);
1699 discard_blks = __wait_discard_cmd_range(sbi, &dp, 0, UINT_MAX);
1700 __init_discard_policy(sbi, &dp, DPOLICY_UMOUNT, 1);
1701 discard_blks += __wait_discard_cmd_range(sbi, &dp, 0, UINT_MAX);
1703 return discard_blks;
1706 /* This should be covered by global mutex, &sit_i->sentry_lock */
1707 static void f2fs_wait_discard_bio(struct f2fs_sb_info *sbi, block_t blkaddr)
1709 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
1710 struct discard_cmd *dc;
1711 bool need_wait = false;
1713 mutex_lock(&dcc->cmd_lock);
1714 dc = (struct discard_cmd *)f2fs_lookup_rb_tree(&dcc->root,
1717 if (dc->state == D_PREP) {
1718 __punch_discard_cmd(sbi, dc, blkaddr);
1724 mutex_unlock(&dcc->cmd_lock);
1727 __wait_one_discard_bio(sbi, dc);
1730 void f2fs_stop_discard_thread(struct f2fs_sb_info *sbi)
1732 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
1734 if (dcc && dcc->f2fs_issue_discard) {
1735 struct task_struct *discard_thread = dcc->f2fs_issue_discard;
1737 dcc->f2fs_issue_discard = NULL;
1738 kthread_stop(discard_thread);
1742 /* This comes from f2fs_put_super */
1743 bool f2fs_issue_discard_timeout(struct f2fs_sb_info *sbi)
1745 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
1746 struct discard_policy dpolicy;
1749 __init_discard_policy(sbi, &dpolicy, DPOLICY_UMOUNT,
1750 dcc->discard_granularity);
1751 __issue_discard_cmd(sbi, &dpolicy);
1752 dropped = __drop_discard_cmd(sbi);
1754 /* just to make sure there is no pending discard commands */
1755 __wait_all_discard_cmd(sbi, NULL);
1757 f2fs_bug_on(sbi, atomic_read(&dcc->discard_cmd_cnt));
1761 static int issue_discard_thread(void *data)
1763 struct f2fs_sb_info *sbi = data;
1764 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
1765 wait_queue_head_t *q = &dcc->discard_wait_queue;
1766 struct discard_policy dpolicy;
1767 unsigned int wait_ms = DEF_MIN_DISCARD_ISSUE_TIME;
1773 if (sbi->gc_mode == GC_URGENT_HIGH ||
1774 !f2fs_available_free_memory(sbi, DISCARD_CACHE))
1775 __init_discard_policy(sbi, &dpolicy, DPOLICY_FORCE, 1);
1777 __init_discard_policy(sbi, &dpolicy, DPOLICY_BG,
1778 dcc->discard_granularity);
1780 if (!atomic_read(&dcc->discard_cmd_cnt))
1781 wait_ms = dpolicy.max_interval;
1783 wait_event_interruptible_timeout(*q,
1784 kthread_should_stop() || freezing(current) ||
1786 msecs_to_jiffies(wait_ms));
1788 if (dcc->discard_wake)
1789 dcc->discard_wake = 0;
1791 /* clean up pending candidates before going to sleep */
1792 if (atomic_read(&dcc->queued_discard))
1793 __wait_all_discard_cmd(sbi, NULL);
1795 if (try_to_freeze())
1797 if (f2fs_readonly(sbi->sb))
1799 if (kthread_should_stop())
1801 if (is_sbi_flag_set(sbi, SBI_NEED_FSCK)) {
1802 wait_ms = dpolicy.max_interval;
1805 if (!atomic_read(&dcc->discard_cmd_cnt))
1808 sb_start_intwrite(sbi->sb);
1810 issued = __issue_discard_cmd(sbi, &dpolicy);
1812 __wait_all_discard_cmd(sbi, &dpolicy);
1813 wait_ms = dpolicy.min_interval;
1814 } else if (issued == -1) {
1815 wait_ms = f2fs_time_to_wait(sbi, DISCARD_TIME);
1817 wait_ms = dpolicy.mid_interval;
1819 wait_ms = dpolicy.max_interval;
1822 sb_end_intwrite(sbi->sb);
1824 } while (!kthread_should_stop());
1828 #ifdef CONFIG_BLK_DEV_ZONED
1829 static int __f2fs_issue_discard_zone(struct f2fs_sb_info *sbi,
1830 struct block_device *bdev, block_t blkstart, block_t blklen)
1832 sector_t sector, nr_sects;
1833 block_t lblkstart = blkstart;
1836 if (f2fs_is_multi_device(sbi)) {
1837 devi = f2fs_target_device_index(sbi, blkstart);
1838 if (blkstart < FDEV(devi).start_blk ||
1839 blkstart > FDEV(devi).end_blk) {
1840 f2fs_err(sbi, "Invalid block %x", blkstart);
1843 blkstart -= FDEV(devi).start_blk;
1846 /* For sequential zones, reset the zone write pointer */
1847 if (f2fs_blkz_is_seq(sbi, devi, blkstart)) {
1848 sector = SECTOR_FROM_BLOCK(blkstart);
1849 nr_sects = SECTOR_FROM_BLOCK(blklen);
1851 if (sector & (bdev_zone_sectors(bdev) - 1) ||
1852 nr_sects != bdev_zone_sectors(bdev)) {
1853 f2fs_err(sbi, "(%d) %s: Unaligned zone reset attempted (block %x + %x)",
1854 devi, sbi->s_ndevs ? FDEV(devi).path : "",
1858 trace_f2fs_issue_reset_zone(bdev, blkstart);
1859 return blkdev_zone_mgmt(bdev, REQ_OP_ZONE_RESET,
1860 sector, nr_sects, GFP_NOFS);
1863 /* For conventional zones, use regular discard if supported */
1864 return __queue_discard_cmd(sbi, bdev, lblkstart, blklen);
1868 static int __issue_discard_async(struct f2fs_sb_info *sbi,
1869 struct block_device *bdev, block_t blkstart, block_t blklen)
1871 #ifdef CONFIG_BLK_DEV_ZONED
1872 if (f2fs_sb_has_blkzoned(sbi) && bdev_is_zoned(bdev))
1873 return __f2fs_issue_discard_zone(sbi, bdev, blkstart, blklen);
1875 return __queue_discard_cmd(sbi, bdev, blkstart, blklen);
1878 static int f2fs_issue_discard(struct f2fs_sb_info *sbi,
1879 block_t blkstart, block_t blklen)
1881 sector_t start = blkstart, len = 0;
1882 struct block_device *bdev;
1883 struct seg_entry *se;
1884 unsigned int offset;
1888 bdev = f2fs_target_device(sbi, blkstart, NULL);
1890 for (i = blkstart; i < blkstart + blklen; i++, len++) {
1892 struct block_device *bdev2 =
1893 f2fs_target_device(sbi, i, NULL);
1895 if (bdev2 != bdev) {
1896 err = __issue_discard_async(sbi, bdev,
1906 se = get_seg_entry(sbi, GET_SEGNO(sbi, i));
1907 offset = GET_BLKOFF_FROM_SEG0(sbi, i);
1909 if (f2fs_block_unit_discard(sbi) &&
1910 !f2fs_test_and_set_bit(offset, se->discard_map))
1911 sbi->discard_blks--;
1915 err = __issue_discard_async(sbi, bdev, start, len);
1919 static bool add_discard_addrs(struct f2fs_sb_info *sbi, struct cp_control *cpc,
1922 int entries = SIT_VBLOCK_MAP_SIZE / sizeof(unsigned long);
1923 int max_blocks = sbi->blocks_per_seg;
1924 struct seg_entry *se = get_seg_entry(sbi, cpc->trim_start);
1925 unsigned long *cur_map = (unsigned long *)se->cur_valid_map;
1926 unsigned long *ckpt_map = (unsigned long *)se->ckpt_valid_map;
1927 unsigned long *discard_map = (unsigned long *)se->discard_map;
1928 unsigned long *dmap = SIT_I(sbi)->tmp_map;
1929 unsigned int start = 0, end = -1;
1930 bool force = (cpc->reason & CP_DISCARD);
1931 struct discard_entry *de = NULL;
1932 struct list_head *head = &SM_I(sbi)->dcc_info->entry_list;
1935 if (se->valid_blocks == max_blocks || !f2fs_hw_support_discard(sbi) ||
1936 !f2fs_block_unit_discard(sbi))
1940 if (!f2fs_realtime_discard_enable(sbi) || !se->valid_blocks ||
1941 SM_I(sbi)->dcc_info->nr_discards >=
1942 SM_I(sbi)->dcc_info->max_discards)
1946 /* SIT_VBLOCK_MAP_SIZE should be multiple of sizeof(unsigned long) */
1947 for (i = 0; i < entries; i++)
1948 dmap[i] = force ? ~ckpt_map[i] & ~discard_map[i] :
1949 (cur_map[i] ^ ckpt_map[i]) & ckpt_map[i];
1951 while (force || SM_I(sbi)->dcc_info->nr_discards <=
1952 SM_I(sbi)->dcc_info->max_discards) {
1953 start = __find_rev_next_bit(dmap, max_blocks, end + 1);
1954 if (start >= max_blocks)
1957 end = __find_rev_next_zero_bit(dmap, max_blocks, start + 1);
1958 if (force && start && end != max_blocks
1959 && (end - start) < cpc->trim_minlen)
1966 de = f2fs_kmem_cache_alloc(discard_entry_slab,
1967 GFP_F2FS_ZERO, true, NULL);
1968 de->start_blkaddr = START_BLOCK(sbi, cpc->trim_start);
1969 list_add_tail(&de->list, head);
1972 for (i = start; i < end; i++)
1973 __set_bit_le(i, (void *)de->discard_map);
1975 SM_I(sbi)->dcc_info->nr_discards += end - start;
1980 static void release_discard_addr(struct discard_entry *entry)
1982 list_del(&entry->list);
1983 kmem_cache_free(discard_entry_slab, entry);
1986 void f2fs_release_discard_addrs(struct f2fs_sb_info *sbi)
1988 struct list_head *head = &(SM_I(sbi)->dcc_info->entry_list);
1989 struct discard_entry *entry, *this;
1992 list_for_each_entry_safe(entry, this, head, list)
1993 release_discard_addr(entry);
1997 * Should call f2fs_clear_prefree_segments after checkpoint is done.
1999 static void set_prefree_as_free_segments(struct f2fs_sb_info *sbi)
2001 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
2004 mutex_lock(&dirty_i->seglist_lock);
2005 for_each_set_bit(segno, dirty_i->dirty_segmap[PRE], MAIN_SEGS(sbi))
2006 __set_test_and_free(sbi, segno, false);
2007 mutex_unlock(&dirty_i->seglist_lock);
2010 void f2fs_clear_prefree_segments(struct f2fs_sb_info *sbi,
2011 struct cp_control *cpc)
2013 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
2014 struct list_head *head = &dcc->entry_list;
2015 struct discard_entry *entry, *this;
2016 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
2017 unsigned long *prefree_map = dirty_i->dirty_segmap[PRE];
2018 unsigned int start = 0, end = -1;
2019 unsigned int secno, start_segno;
2020 bool force = (cpc->reason & CP_DISCARD);
2021 bool section_alignment = F2FS_OPTION(sbi).discard_unit ==
2022 DISCARD_UNIT_SECTION;
2024 if (f2fs_lfs_mode(sbi) && __is_large_section(sbi))
2025 section_alignment = true;
2027 mutex_lock(&dirty_i->seglist_lock);
2032 if (section_alignment && end != -1)
2034 start = find_next_bit(prefree_map, MAIN_SEGS(sbi), end + 1);
2035 if (start >= MAIN_SEGS(sbi))
2037 end = find_next_zero_bit(prefree_map, MAIN_SEGS(sbi),
2040 if (section_alignment) {
2041 start = rounddown(start, sbi->segs_per_sec);
2042 end = roundup(end, sbi->segs_per_sec);
2045 for (i = start; i < end; i++) {
2046 if (test_and_clear_bit(i, prefree_map))
2047 dirty_i->nr_dirty[PRE]--;
2050 if (!f2fs_realtime_discard_enable(sbi))
2053 if (force && start >= cpc->trim_start &&
2054 (end - 1) <= cpc->trim_end)
2057 if (!f2fs_lfs_mode(sbi) || !__is_large_section(sbi)) {
2058 f2fs_issue_discard(sbi, START_BLOCK(sbi, start),
2059 (end - start) << sbi->log_blocks_per_seg);
2063 secno = GET_SEC_FROM_SEG(sbi, start);
2064 start_segno = GET_SEG_FROM_SEC(sbi, secno);
2065 if (!IS_CURSEC(sbi, secno) &&
2066 !get_valid_blocks(sbi, start, true))
2067 f2fs_issue_discard(sbi, START_BLOCK(sbi, start_segno),
2068 sbi->segs_per_sec << sbi->log_blocks_per_seg);
2070 start = start_segno + sbi->segs_per_sec;
2076 mutex_unlock(&dirty_i->seglist_lock);
2078 if (!f2fs_block_unit_discard(sbi))
2081 /* send small discards */
2082 list_for_each_entry_safe(entry, this, head, list) {
2083 unsigned int cur_pos = 0, next_pos, len, total_len = 0;
2084 bool is_valid = test_bit_le(0, entry->discard_map);
2088 next_pos = find_next_zero_bit_le(entry->discard_map,
2089 sbi->blocks_per_seg, cur_pos);
2090 len = next_pos - cur_pos;
2092 if (f2fs_sb_has_blkzoned(sbi) ||
2093 (force && len < cpc->trim_minlen))
2096 f2fs_issue_discard(sbi, entry->start_blkaddr + cur_pos,
2100 next_pos = find_next_bit_le(entry->discard_map,
2101 sbi->blocks_per_seg, cur_pos);
2105 is_valid = !is_valid;
2107 if (cur_pos < sbi->blocks_per_seg)
2110 release_discard_addr(entry);
2111 dcc->nr_discards -= total_len;
2115 wake_up_discard_thread(sbi, false);
2118 int f2fs_start_discard_thread(struct f2fs_sb_info *sbi)
2120 dev_t dev = sbi->sb->s_bdev->bd_dev;
2121 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
2124 if (!f2fs_realtime_discard_enable(sbi))
2127 dcc->f2fs_issue_discard = kthread_run(issue_discard_thread, sbi,
2128 "f2fs_discard-%u:%u", MAJOR(dev), MINOR(dev));
2129 if (IS_ERR(dcc->f2fs_issue_discard))
2130 err = PTR_ERR(dcc->f2fs_issue_discard);
2135 static int create_discard_cmd_control(struct f2fs_sb_info *sbi)
2137 struct discard_cmd_control *dcc;
2140 if (SM_I(sbi)->dcc_info) {
2141 dcc = SM_I(sbi)->dcc_info;
2145 dcc = f2fs_kzalloc(sbi, sizeof(struct discard_cmd_control), GFP_KERNEL);
2149 dcc->discard_granularity = DEFAULT_DISCARD_GRANULARITY;
2150 if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SEGMENT)
2151 dcc->discard_granularity = sbi->blocks_per_seg;
2152 else if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SECTION)
2153 dcc->discard_granularity = BLKS_PER_SEC(sbi);
2155 INIT_LIST_HEAD(&dcc->entry_list);
2156 for (i = 0; i < MAX_PLIST_NUM; i++)
2157 INIT_LIST_HEAD(&dcc->pend_list[i]);
2158 INIT_LIST_HEAD(&dcc->wait_list);
2159 INIT_LIST_HEAD(&dcc->fstrim_list);
2160 mutex_init(&dcc->cmd_lock);
2161 atomic_set(&dcc->issued_discard, 0);
2162 atomic_set(&dcc->queued_discard, 0);
2163 atomic_set(&dcc->discard_cmd_cnt, 0);
2164 dcc->nr_discards = 0;
2165 dcc->max_discards = MAIN_SEGS(sbi) << sbi->log_blocks_per_seg;
2166 dcc->undiscard_blks = 0;
2168 dcc->root = RB_ROOT_CACHED;
2169 dcc->rbtree_check = false;
2171 init_waitqueue_head(&dcc->discard_wait_queue);
2172 SM_I(sbi)->dcc_info = dcc;
2174 err = f2fs_start_discard_thread(sbi);
2177 SM_I(sbi)->dcc_info = NULL;
2183 static void destroy_discard_cmd_control(struct f2fs_sb_info *sbi)
2185 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
2190 f2fs_stop_discard_thread(sbi);
2193 * Recovery can cache discard commands, so in error path of
2194 * fill_super(), it needs to give a chance to handle them.
2196 if (unlikely(atomic_read(&dcc->discard_cmd_cnt)))
2197 f2fs_issue_discard_timeout(sbi);
2200 SM_I(sbi)->dcc_info = NULL;
2203 static bool __mark_sit_entry_dirty(struct f2fs_sb_info *sbi, unsigned int segno)
2205 struct sit_info *sit_i = SIT_I(sbi);
2207 if (!__test_and_set_bit(segno, sit_i->dirty_sentries_bitmap)) {
2208 sit_i->dirty_sentries++;
2215 static void __set_sit_entry_type(struct f2fs_sb_info *sbi, int type,
2216 unsigned int segno, int modified)
2218 struct seg_entry *se = get_seg_entry(sbi, segno);
2222 __mark_sit_entry_dirty(sbi, segno);
2225 static inline unsigned long long get_segment_mtime(struct f2fs_sb_info *sbi,
2228 unsigned int segno = GET_SEGNO(sbi, blkaddr);
2230 if (segno == NULL_SEGNO)
2232 return get_seg_entry(sbi, segno)->mtime;
2235 static void update_segment_mtime(struct f2fs_sb_info *sbi, block_t blkaddr,
2236 unsigned long long old_mtime)
2238 struct seg_entry *se;
2239 unsigned int segno = GET_SEGNO(sbi, blkaddr);
2240 unsigned long long ctime = get_mtime(sbi, false);
2241 unsigned long long mtime = old_mtime ? old_mtime : ctime;
2243 if (segno == NULL_SEGNO)
2246 se = get_seg_entry(sbi, segno);
2251 se->mtime = div_u64(se->mtime * se->valid_blocks + mtime,
2252 se->valid_blocks + 1);
2254 if (ctime > SIT_I(sbi)->max_mtime)
2255 SIT_I(sbi)->max_mtime = ctime;
2258 static void update_sit_entry(struct f2fs_sb_info *sbi, block_t blkaddr, int del)
2260 struct seg_entry *se;
2261 unsigned int segno, offset;
2262 long int new_vblocks;
2264 #ifdef CONFIG_F2FS_CHECK_FS
2268 segno = GET_SEGNO(sbi, blkaddr);
2270 se = get_seg_entry(sbi, segno);
2271 new_vblocks = se->valid_blocks + del;
2272 offset = GET_BLKOFF_FROM_SEG0(sbi, blkaddr);
2274 f2fs_bug_on(sbi, (new_vblocks < 0 ||
2275 (new_vblocks > f2fs_usable_blks_in_seg(sbi, segno))));
2277 se->valid_blocks = new_vblocks;
2279 /* Update valid block bitmap */
2281 exist = f2fs_test_and_set_bit(offset, se->cur_valid_map);
2282 #ifdef CONFIG_F2FS_CHECK_FS
2283 mir_exist = f2fs_test_and_set_bit(offset,
2284 se->cur_valid_map_mir);
2285 if (unlikely(exist != mir_exist)) {
2286 f2fs_err(sbi, "Inconsistent error when setting bitmap, blk:%u, old bit:%d",
2288 f2fs_bug_on(sbi, 1);
2291 if (unlikely(exist)) {
2292 f2fs_err(sbi, "Bitmap was wrongly set, blk:%u",
2294 f2fs_bug_on(sbi, 1);
2299 if (f2fs_block_unit_discard(sbi) &&
2300 !f2fs_test_and_set_bit(offset, se->discard_map))
2301 sbi->discard_blks--;
2304 * SSR should never reuse block which is checkpointed
2305 * or newly invalidated.
2307 if (!is_sbi_flag_set(sbi, SBI_CP_DISABLED)) {
2308 if (!f2fs_test_and_set_bit(offset, se->ckpt_valid_map))
2309 se->ckpt_valid_blocks++;
2312 exist = f2fs_test_and_clear_bit(offset, se->cur_valid_map);
2313 #ifdef CONFIG_F2FS_CHECK_FS
2314 mir_exist = f2fs_test_and_clear_bit(offset,
2315 se->cur_valid_map_mir);
2316 if (unlikely(exist != mir_exist)) {
2317 f2fs_err(sbi, "Inconsistent error when clearing bitmap, blk:%u, old bit:%d",
2319 f2fs_bug_on(sbi, 1);
2322 if (unlikely(!exist)) {
2323 f2fs_err(sbi, "Bitmap was wrongly cleared, blk:%u",
2325 f2fs_bug_on(sbi, 1);
2328 } else if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
2330 * If checkpoints are off, we must not reuse data that
2331 * was used in the previous checkpoint. If it was used
2332 * before, we must track that to know how much space we
2335 if (f2fs_test_bit(offset, se->ckpt_valid_map)) {
2336 spin_lock(&sbi->stat_lock);
2337 sbi->unusable_block_count++;
2338 spin_unlock(&sbi->stat_lock);
2342 if (f2fs_block_unit_discard(sbi) &&
2343 f2fs_test_and_clear_bit(offset, se->discard_map))
2344 sbi->discard_blks++;
2346 if (!f2fs_test_bit(offset, se->ckpt_valid_map))
2347 se->ckpt_valid_blocks += del;
2349 __mark_sit_entry_dirty(sbi, segno);
2351 /* update total number of valid blocks to be written in ckpt area */
2352 SIT_I(sbi)->written_valid_blocks += del;
2354 if (__is_large_section(sbi))
2355 get_sec_entry(sbi, segno)->valid_blocks += del;
2358 void f2fs_invalidate_blocks(struct f2fs_sb_info *sbi, block_t addr)
2360 unsigned int segno = GET_SEGNO(sbi, addr);
2361 struct sit_info *sit_i = SIT_I(sbi);
2363 f2fs_bug_on(sbi, addr == NULL_ADDR);
2364 if (addr == NEW_ADDR || addr == COMPRESS_ADDR)
2367 invalidate_mapping_pages(META_MAPPING(sbi), addr, addr);
2368 f2fs_invalidate_compress_page(sbi, addr);
2370 /* add it into sit main buffer */
2371 down_write(&sit_i->sentry_lock);
2373 update_segment_mtime(sbi, addr, 0);
2374 update_sit_entry(sbi, addr, -1);
2376 /* add it into dirty seglist */
2377 locate_dirty_segment(sbi, segno);
2379 up_write(&sit_i->sentry_lock);
2382 bool f2fs_is_checkpointed_data(struct f2fs_sb_info *sbi, block_t blkaddr)
2384 struct sit_info *sit_i = SIT_I(sbi);
2385 unsigned int segno, offset;
2386 struct seg_entry *se;
2389 if (!__is_valid_data_blkaddr(blkaddr))
2392 down_read(&sit_i->sentry_lock);
2394 segno = GET_SEGNO(sbi, blkaddr);
2395 se = get_seg_entry(sbi, segno);
2396 offset = GET_BLKOFF_FROM_SEG0(sbi, blkaddr);
2398 if (f2fs_test_bit(offset, se->ckpt_valid_map))
2401 up_read(&sit_i->sentry_lock);
2407 * This function should be resided under the curseg_mutex lock
2409 static void __add_sum_entry(struct f2fs_sb_info *sbi, int type,
2410 struct f2fs_summary *sum)
2412 struct curseg_info *curseg = CURSEG_I(sbi, type);
2413 void *addr = curseg->sum_blk;
2415 addr += curseg->next_blkoff * sizeof(struct f2fs_summary);
2416 memcpy(addr, sum, sizeof(struct f2fs_summary));
2420 * Calculate the number of current summary pages for writing
2422 int f2fs_npages_for_summary_flush(struct f2fs_sb_info *sbi, bool for_ra)
2424 int valid_sum_count = 0;
2427 for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) {
2428 if (sbi->ckpt->alloc_type[i] == SSR)
2429 valid_sum_count += sbi->blocks_per_seg;
2432 valid_sum_count += le16_to_cpu(
2433 F2FS_CKPT(sbi)->cur_data_blkoff[i]);
2435 valid_sum_count += curseg_blkoff(sbi, i);
2439 sum_in_page = (PAGE_SIZE - 2 * SUM_JOURNAL_SIZE -
2440 SUM_FOOTER_SIZE) / SUMMARY_SIZE;
2441 if (valid_sum_count <= sum_in_page)
2443 else if ((valid_sum_count - sum_in_page) <=
2444 (PAGE_SIZE - SUM_FOOTER_SIZE) / SUMMARY_SIZE)
2450 * Caller should put this summary page
2452 struct page *f2fs_get_sum_page(struct f2fs_sb_info *sbi, unsigned int segno)
2454 if (unlikely(f2fs_cp_error(sbi)))
2455 return ERR_PTR(-EIO);
2456 return f2fs_get_meta_page_retry(sbi, GET_SUM_BLOCK(sbi, segno));
2459 void f2fs_update_meta_page(struct f2fs_sb_info *sbi,
2460 void *src, block_t blk_addr)
2462 struct page *page = f2fs_grab_meta_page(sbi, blk_addr);
2464 memcpy(page_address(page), src, PAGE_SIZE);
2465 set_page_dirty(page);
2466 f2fs_put_page(page, 1);
2469 static void write_sum_page(struct f2fs_sb_info *sbi,
2470 struct f2fs_summary_block *sum_blk, block_t blk_addr)
2472 f2fs_update_meta_page(sbi, (void *)sum_blk, blk_addr);
2475 static void write_current_sum_page(struct f2fs_sb_info *sbi,
2476 int type, block_t blk_addr)
2478 struct curseg_info *curseg = CURSEG_I(sbi, type);
2479 struct page *page = f2fs_grab_meta_page(sbi, blk_addr);
2480 struct f2fs_summary_block *src = curseg->sum_blk;
2481 struct f2fs_summary_block *dst;
2483 dst = (struct f2fs_summary_block *)page_address(page);
2484 memset(dst, 0, PAGE_SIZE);
2486 mutex_lock(&curseg->curseg_mutex);
2488 down_read(&curseg->journal_rwsem);
2489 memcpy(&dst->journal, curseg->journal, SUM_JOURNAL_SIZE);
2490 up_read(&curseg->journal_rwsem);
2492 memcpy(dst->entries, src->entries, SUM_ENTRY_SIZE);
2493 memcpy(&dst->footer, &src->footer, SUM_FOOTER_SIZE);
2495 mutex_unlock(&curseg->curseg_mutex);
2497 set_page_dirty(page);
2498 f2fs_put_page(page, 1);
2501 static int is_next_segment_free(struct f2fs_sb_info *sbi,
2502 struct curseg_info *curseg, int type)
2504 unsigned int segno = curseg->segno + 1;
2505 struct free_segmap_info *free_i = FREE_I(sbi);
2507 if (segno < MAIN_SEGS(sbi) && segno % sbi->segs_per_sec)
2508 return !test_bit(segno, free_i->free_segmap);
2513 * Find a new segment from the free segments bitmap to right order
2514 * This function should be returned with success, otherwise BUG
2516 static void get_new_segment(struct f2fs_sb_info *sbi,
2517 unsigned int *newseg, bool new_sec, int dir)
2519 struct free_segmap_info *free_i = FREE_I(sbi);
2520 unsigned int segno, secno, zoneno;
2521 unsigned int total_zones = MAIN_SECS(sbi) / sbi->secs_per_zone;
2522 unsigned int hint = GET_SEC_FROM_SEG(sbi, *newseg);
2523 unsigned int old_zoneno = GET_ZONE_FROM_SEG(sbi, *newseg);
2524 unsigned int left_start = hint;
2529 spin_lock(&free_i->segmap_lock);
2531 if (!new_sec && ((*newseg + 1) % sbi->segs_per_sec)) {
2532 segno = find_next_zero_bit(free_i->free_segmap,
2533 GET_SEG_FROM_SEC(sbi, hint + 1), *newseg + 1);
2534 if (segno < GET_SEG_FROM_SEC(sbi, hint + 1))
2538 secno = find_next_zero_bit(free_i->free_secmap, MAIN_SECS(sbi), hint);
2539 if (secno >= MAIN_SECS(sbi)) {
2540 if (dir == ALLOC_RIGHT) {
2541 secno = find_next_zero_bit(free_i->free_secmap,
2543 f2fs_bug_on(sbi, secno >= MAIN_SECS(sbi));
2546 left_start = hint - 1;
2552 while (test_bit(left_start, free_i->free_secmap)) {
2553 if (left_start > 0) {
2557 left_start = find_next_zero_bit(free_i->free_secmap,
2559 f2fs_bug_on(sbi, left_start >= MAIN_SECS(sbi));
2564 segno = GET_SEG_FROM_SEC(sbi, secno);
2565 zoneno = GET_ZONE_FROM_SEC(sbi, secno);
2567 /* give up on finding another zone */
2570 if (sbi->secs_per_zone == 1)
2572 if (zoneno == old_zoneno)
2574 if (dir == ALLOC_LEFT) {
2575 if (!go_left && zoneno + 1 >= total_zones)
2577 if (go_left && zoneno == 0)
2580 for (i = 0; i < NR_CURSEG_TYPE; i++)
2581 if (CURSEG_I(sbi, i)->zone == zoneno)
2584 if (i < NR_CURSEG_TYPE) {
2585 /* zone is in user, try another */
2587 hint = zoneno * sbi->secs_per_zone - 1;
2588 else if (zoneno + 1 >= total_zones)
2591 hint = (zoneno + 1) * sbi->secs_per_zone;
2593 goto find_other_zone;
2596 /* set it as dirty segment in free segmap */
2597 f2fs_bug_on(sbi, test_bit(segno, free_i->free_segmap));
2598 __set_inuse(sbi, segno);
2600 spin_unlock(&free_i->segmap_lock);
2603 static void reset_curseg(struct f2fs_sb_info *sbi, int type, int modified)
2605 struct curseg_info *curseg = CURSEG_I(sbi, type);
2606 struct summary_footer *sum_footer;
2607 unsigned short seg_type = curseg->seg_type;
2609 curseg->inited = true;
2610 curseg->segno = curseg->next_segno;
2611 curseg->zone = GET_ZONE_FROM_SEG(sbi, curseg->segno);
2612 curseg->next_blkoff = 0;
2613 curseg->next_segno = NULL_SEGNO;
2615 sum_footer = &(curseg->sum_blk->footer);
2616 memset(sum_footer, 0, sizeof(struct summary_footer));
2618 sanity_check_seg_type(sbi, seg_type);
2620 if (IS_DATASEG(seg_type))
2621 SET_SUM_TYPE(sum_footer, SUM_TYPE_DATA);
2622 if (IS_NODESEG(seg_type))
2623 SET_SUM_TYPE(sum_footer, SUM_TYPE_NODE);
2624 __set_sit_entry_type(sbi, seg_type, curseg->segno, modified);
2627 static unsigned int __get_next_segno(struct f2fs_sb_info *sbi, int type)
2629 struct curseg_info *curseg = CURSEG_I(sbi, type);
2630 unsigned short seg_type = curseg->seg_type;
2632 sanity_check_seg_type(sbi, seg_type);
2634 /* if segs_per_sec is large than 1, we need to keep original policy. */
2635 if (__is_large_section(sbi))
2636 return curseg->segno;
2638 /* inmem log may not locate on any segment after mount */
2639 if (!curseg->inited)
2642 if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
2645 if (test_opt(sbi, NOHEAP) &&
2646 (seg_type == CURSEG_HOT_DATA || IS_NODESEG(seg_type)))
2649 if (SIT_I(sbi)->last_victim[ALLOC_NEXT])
2650 return SIT_I(sbi)->last_victim[ALLOC_NEXT];
2652 /* find segments from 0 to reuse freed segments */
2653 if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_REUSE)
2656 return curseg->segno;
2660 * Allocate a current working segment.
2661 * This function always allocates a free segment in LFS manner.
2663 static void new_curseg(struct f2fs_sb_info *sbi, int type, bool new_sec)
2665 struct curseg_info *curseg = CURSEG_I(sbi, type);
2666 unsigned short seg_type = curseg->seg_type;
2667 unsigned int segno = curseg->segno;
2668 int dir = ALLOC_LEFT;
2671 write_sum_page(sbi, curseg->sum_blk,
2672 GET_SUM_BLOCK(sbi, segno));
2673 if (seg_type == CURSEG_WARM_DATA || seg_type == CURSEG_COLD_DATA)
2676 if (test_opt(sbi, NOHEAP))
2679 segno = __get_next_segno(sbi, type);
2680 get_new_segment(sbi, &segno, new_sec, dir);
2681 curseg->next_segno = segno;
2682 reset_curseg(sbi, type, 1);
2683 curseg->alloc_type = LFS;
2686 static int __next_free_blkoff(struct f2fs_sb_info *sbi,
2687 int segno, block_t start)
2689 struct seg_entry *se = get_seg_entry(sbi, segno);
2690 int entries = SIT_VBLOCK_MAP_SIZE / sizeof(unsigned long);
2691 unsigned long *target_map = SIT_I(sbi)->tmp_map;
2692 unsigned long *ckpt_map = (unsigned long *)se->ckpt_valid_map;
2693 unsigned long *cur_map = (unsigned long *)se->cur_valid_map;
2696 for (i = 0; i < entries; i++)
2697 target_map[i] = ckpt_map[i] | cur_map[i];
2699 return __find_rev_next_zero_bit(target_map, sbi->blocks_per_seg, start);
2703 * If a segment is written by LFS manner, next block offset is just obtained
2704 * by increasing the current block offset. However, if a segment is written by
2705 * SSR manner, next block offset obtained by calling __next_free_blkoff
2707 static void __refresh_next_blkoff(struct f2fs_sb_info *sbi,
2708 struct curseg_info *seg)
2710 if (seg->alloc_type == SSR)
2712 __next_free_blkoff(sbi, seg->segno,
2713 seg->next_blkoff + 1);
2718 bool f2fs_segment_has_free_slot(struct f2fs_sb_info *sbi, int segno)
2720 return __next_free_blkoff(sbi, segno, 0) < sbi->blocks_per_seg;
2724 * This function always allocates a used segment(from dirty seglist) by SSR
2725 * manner, so it should recover the existing segment information of valid blocks
2727 static void change_curseg(struct f2fs_sb_info *sbi, int type, bool flush)
2729 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
2730 struct curseg_info *curseg = CURSEG_I(sbi, type);
2731 unsigned int new_segno = curseg->next_segno;
2732 struct f2fs_summary_block *sum_node;
2733 struct page *sum_page;
2736 write_sum_page(sbi, curseg->sum_blk,
2737 GET_SUM_BLOCK(sbi, curseg->segno));
2739 __set_test_and_inuse(sbi, new_segno);
2741 mutex_lock(&dirty_i->seglist_lock);
2742 __remove_dirty_segment(sbi, new_segno, PRE);
2743 __remove_dirty_segment(sbi, new_segno, DIRTY);
2744 mutex_unlock(&dirty_i->seglist_lock);
2746 reset_curseg(sbi, type, 1);
2747 curseg->alloc_type = SSR;
2748 curseg->next_blkoff = __next_free_blkoff(sbi, curseg->segno, 0);
2750 sum_page = f2fs_get_sum_page(sbi, new_segno);
2751 if (IS_ERR(sum_page)) {
2752 /* GC won't be able to use stale summary pages by cp_error */
2753 memset(curseg->sum_blk, 0, SUM_ENTRY_SIZE);
2756 sum_node = (struct f2fs_summary_block *)page_address(sum_page);
2757 memcpy(curseg->sum_blk, sum_node, SUM_ENTRY_SIZE);
2758 f2fs_put_page(sum_page, 1);
2761 static int get_ssr_segment(struct f2fs_sb_info *sbi, int type,
2762 int alloc_mode, unsigned long long age);
2764 static void get_atssr_segment(struct f2fs_sb_info *sbi, int type,
2765 int target_type, int alloc_mode,
2766 unsigned long long age)
2768 struct curseg_info *curseg = CURSEG_I(sbi, type);
2770 curseg->seg_type = target_type;
2772 if (get_ssr_segment(sbi, type, alloc_mode, age)) {
2773 struct seg_entry *se = get_seg_entry(sbi, curseg->next_segno);
2775 curseg->seg_type = se->type;
2776 change_curseg(sbi, type, true);
2778 /* allocate cold segment by default */
2779 curseg->seg_type = CURSEG_COLD_DATA;
2780 new_curseg(sbi, type, true);
2782 stat_inc_seg_type(sbi, curseg);
2785 static void __f2fs_init_atgc_curseg(struct f2fs_sb_info *sbi)
2787 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_ALL_DATA_ATGC);
2789 if (!sbi->am.atgc_enabled)
2792 down_read(&SM_I(sbi)->curseg_lock);
2794 mutex_lock(&curseg->curseg_mutex);
2795 down_write(&SIT_I(sbi)->sentry_lock);
2797 get_atssr_segment(sbi, CURSEG_ALL_DATA_ATGC, CURSEG_COLD_DATA, SSR, 0);
2799 up_write(&SIT_I(sbi)->sentry_lock);
2800 mutex_unlock(&curseg->curseg_mutex);
2802 up_read(&SM_I(sbi)->curseg_lock);
2805 void f2fs_init_inmem_curseg(struct f2fs_sb_info *sbi)
2807 __f2fs_init_atgc_curseg(sbi);
2810 static void __f2fs_save_inmem_curseg(struct f2fs_sb_info *sbi, int type)
2812 struct curseg_info *curseg = CURSEG_I(sbi, type);
2814 mutex_lock(&curseg->curseg_mutex);
2815 if (!curseg->inited)
2818 if (get_valid_blocks(sbi, curseg->segno, false)) {
2819 write_sum_page(sbi, curseg->sum_blk,
2820 GET_SUM_BLOCK(sbi, curseg->segno));
2822 mutex_lock(&DIRTY_I(sbi)->seglist_lock);
2823 __set_test_and_free(sbi, curseg->segno, true);
2824 mutex_unlock(&DIRTY_I(sbi)->seglist_lock);
2827 mutex_unlock(&curseg->curseg_mutex);
2830 void f2fs_save_inmem_curseg(struct f2fs_sb_info *sbi)
2832 __f2fs_save_inmem_curseg(sbi, CURSEG_COLD_DATA_PINNED);
2834 if (sbi->am.atgc_enabled)
2835 __f2fs_save_inmem_curseg(sbi, CURSEG_ALL_DATA_ATGC);
2838 static void __f2fs_restore_inmem_curseg(struct f2fs_sb_info *sbi, int type)
2840 struct curseg_info *curseg = CURSEG_I(sbi, type);
2842 mutex_lock(&curseg->curseg_mutex);
2843 if (!curseg->inited)
2845 if (get_valid_blocks(sbi, curseg->segno, false))
2848 mutex_lock(&DIRTY_I(sbi)->seglist_lock);
2849 __set_test_and_inuse(sbi, curseg->segno);
2850 mutex_unlock(&DIRTY_I(sbi)->seglist_lock);
2852 mutex_unlock(&curseg->curseg_mutex);
2855 void f2fs_restore_inmem_curseg(struct f2fs_sb_info *sbi)
2857 __f2fs_restore_inmem_curseg(sbi, CURSEG_COLD_DATA_PINNED);
2859 if (sbi->am.atgc_enabled)
2860 __f2fs_restore_inmem_curseg(sbi, CURSEG_ALL_DATA_ATGC);
2863 static int get_ssr_segment(struct f2fs_sb_info *sbi, int type,
2864 int alloc_mode, unsigned long long age)
2866 struct curseg_info *curseg = CURSEG_I(sbi, type);
2867 const struct victim_selection *v_ops = DIRTY_I(sbi)->v_ops;
2868 unsigned segno = NULL_SEGNO;
2869 unsigned short seg_type = curseg->seg_type;
2871 bool reversed = false;
2873 sanity_check_seg_type(sbi, seg_type);
2875 /* f2fs_need_SSR() already forces to do this */
2876 if (!v_ops->get_victim(sbi, &segno, BG_GC, seg_type, alloc_mode, age)) {
2877 curseg->next_segno = segno;
2881 /* For node segments, let's do SSR more intensively */
2882 if (IS_NODESEG(seg_type)) {
2883 if (seg_type >= CURSEG_WARM_NODE) {
2885 i = CURSEG_COLD_NODE;
2887 i = CURSEG_HOT_NODE;
2889 cnt = NR_CURSEG_NODE_TYPE;
2891 if (seg_type >= CURSEG_WARM_DATA) {
2893 i = CURSEG_COLD_DATA;
2895 i = CURSEG_HOT_DATA;
2897 cnt = NR_CURSEG_DATA_TYPE;
2900 for (; cnt-- > 0; reversed ? i-- : i++) {
2903 if (!v_ops->get_victim(sbi, &segno, BG_GC, i, alloc_mode, age)) {
2904 curseg->next_segno = segno;
2909 /* find valid_blocks=0 in dirty list */
2910 if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
2911 segno = get_free_segment(sbi);
2912 if (segno != NULL_SEGNO) {
2913 curseg->next_segno = segno;
2921 * flush out current segment and replace it with new segment
2922 * This function should be returned with success, otherwise BUG
2924 static void allocate_segment_by_default(struct f2fs_sb_info *sbi,
2925 int type, bool force)
2927 struct curseg_info *curseg = CURSEG_I(sbi, type);
2930 new_curseg(sbi, type, true);
2931 else if (!is_set_ckpt_flags(sbi, CP_CRC_RECOVERY_FLAG) &&
2932 curseg->seg_type == CURSEG_WARM_NODE)
2933 new_curseg(sbi, type, false);
2934 else if (curseg->alloc_type == LFS &&
2935 is_next_segment_free(sbi, curseg, type) &&
2936 likely(!is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
2937 new_curseg(sbi, type, false);
2938 else if (f2fs_need_SSR(sbi) &&
2939 get_ssr_segment(sbi, type, SSR, 0))
2940 change_curseg(sbi, type, true);
2942 new_curseg(sbi, type, false);
2944 stat_inc_seg_type(sbi, curseg);
2947 void f2fs_allocate_segment_for_resize(struct f2fs_sb_info *sbi, int type,
2948 unsigned int start, unsigned int end)
2950 struct curseg_info *curseg = CURSEG_I(sbi, type);
2953 down_read(&SM_I(sbi)->curseg_lock);
2954 mutex_lock(&curseg->curseg_mutex);
2955 down_write(&SIT_I(sbi)->sentry_lock);
2957 segno = CURSEG_I(sbi, type)->segno;
2958 if (segno < start || segno > end)
2961 if (f2fs_need_SSR(sbi) && get_ssr_segment(sbi, type, SSR, 0))
2962 change_curseg(sbi, type, true);
2964 new_curseg(sbi, type, true);
2966 stat_inc_seg_type(sbi, curseg);
2968 locate_dirty_segment(sbi, segno);
2970 up_write(&SIT_I(sbi)->sentry_lock);
2972 if (segno != curseg->segno)
2973 f2fs_notice(sbi, "For resize: curseg of type %d: %u ==> %u",
2974 type, segno, curseg->segno);
2976 mutex_unlock(&curseg->curseg_mutex);
2977 up_read(&SM_I(sbi)->curseg_lock);
2980 static void __allocate_new_segment(struct f2fs_sb_info *sbi, int type,
2981 bool new_sec, bool force)
2983 struct curseg_info *curseg = CURSEG_I(sbi, type);
2984 unsigned int old_segno;
2986 if (!curseg->inited)
2989 if (force || curseg->next_blkoff ||
2990 get_valid_blocks(sbi, curseg->segno, new_sec))
2993 if (!get_ckpt_valid_blocks(sbi, curseg->segno, new_sec))
2996 old_segno = curseg->segno;
2997 SIT_I(sbi)->s_ops->allocate_segment(sbi, type, true);
2998 locate_dirty_segment(sbi, old_segno);
3001 static void __allocate_new_section(struct f2fs_sb_info *sbi,
3002 int type, bool force)
3004 __allocate_new_segment(sbi, type, true, force);
3007 void f2fs_allocate_new_section(struct f2fs_sb_info *sbi, int type, bool force)
3009 down_read(&SM_I(sbi)->curseg_lock);
3010 down_write(&SIT_I(sbi)->sentry_lock);
3011 __allocate_new_section(sbi, type, force);
3012 up_write(&SIT_I(sbi)->sentry_lock);
3013 up_read(&SM_I(sbi)->curseg_lock);
3016 void f2fs_allocate_new_segments(struct f2fs_sb_info *sbi)
3020 down_read(&SM_I(sbi)->curseg_lock);
3021 down_write(&SIT_I(sbi)->sentry_lock);
3022 for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++)
3023 __allocate_new_segment(sbi, i, false, false);
3024 up_write(&SIT_I(sbi)->sentry_lock);
3025 up_read(&SM_I(sbi)->curseg_lock);
3028 static const struct segment_allocation default_salloc_ops = {
3029 .allocate_segment = allocate_segment_by_default,
3032 bool f2fs_exist_trim_candidates(struct f2fs_sb_info *sbi,
3033 struct cp_control *cpc)
3035 __u64 trim_start = cpc->trim_start;
3036 bool has_candidate = false;
3038 down_write(&SIT_I(sbi)->sentry_lock);
3039 for (; cpc->trim_start <= cpc->trim_end; cpc->trim_start++) {
3040 if (add_discard_addrs(sbi, cpc, true)) {
3041 has_candidate = true;
3045 up_write(&SIT_I(sbi)->sentry_lock);
3047 cpc->trim_start = trim_start;
3048 return has_candidate;
3051 static unsigned int __issue_discard_cmd_range(struct f2fs_sb_info *sbi,
3052 struct discard_policy *dpolicy,
3053 unsigned int start, unsigned int end)
3055 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
3056 struct discard_cmd *prev_dc = NULL, *next_dc = NULL;
3057 struct rb_node **insert_p = NULL, *insert_parent = NULL;
3058 struct discard_cmd *dc;
3059 struct blk_plug plug;
3061 unsigned int trimmed = 0;
3066 mutex_lock(&dcc->cmd_lock);
3067 if (unlikely(dcc->rbtree_check))
3068 f2fs_bug_on(sbi, !f2fs_check_rb_tree_consistence(sbi,
3069 &dcc->root, false));
3071 dc = (struct discard_cmd *)f2fs_lookup_rb_tree_ret(&dcc->root,
3073 (struct rb_entry **)&prev_dc,
3074 (struct rb_entry **)&next_dc,
3075 &insert_p, &insert_parent, true, NULL);
3079 blk_start_plug(&plug);
3081 while (dc && dc->lstart <= end) {
3082 struct rb_node *node;
3085 if (dc->len < dpolicy->granularity)
3088 if (dc->state != D_PREP) {
3089 list_move_tail(&dc->list, &dcc->fstrim_list);
3093 err = __submit_discard_cmd(sbi, dpolicy, dc, &issued);
3095 if (issued >= dpolicy->max_requests) {
3096 start = dc->lstart + dc->len;
3099 __remove_discard_cmd(sbi, dc);
3101 blk_finish_plug(&plug);
3102 mutex_unlock(&dcc->cmd_lock);
3103 trimmed += __wait_all_discard_cmd(sbi, NULL);
3104 congestion_wait(BLK_RW_ASYNC, DEFAULT_IO_TIMEOUT);
3108 node = rb_next(&dc->rb_node);
3110 __remove_discard_cmd(sbi, dc);
3111 dc = rb_entry_safe(node, struct discard_cmd, rb_node);
3113 if (fatal_signal_pending(current))
3117 blk_finish_plug(&plug);
3118 mutex_unlock(&dcc->cmd_lock);
3123 int f2fs_trim_fs(struct f2fs_sb_info *sbi, struct fstrim_range *range)
3125 __u64 start = F2FS_BYTES_TO_BLK(range->start);
3126 __u64 end = start + F2FS_BYTES_TO_BLK(range->len) - 1;
3127 unsigned int start_segno, end_segno;
3128 block_t start_block, end_block;
3129 struct cp_control cpc;
3130 struct discard_policy dpolicy;
3131 unsigned long long trimmed = 0;
3133 bool need_align = f2fs_lfs_mode(sbi) && __is_large_section(sbi);
3135 if (start >= MAX_BLKADDR(sbi) || range->len < sbi->blocksize)
3138 if (end < MAIN_BLKADDR(sbi))
3141 if (is_sbi_flag_set(sbi, SBI_NEED_FSCK)) {
3142 f2fs_warn(sbi, "Found FS corruption, run fsck to fix.");
3143 return -EFSCORRUPTED;
3146 /* start/end segment number in main_area */
3147 start_segno = (start <= MAIN_BLKADDR(sbi)) ? 0 : GET_SEGNO(sbi, start);
3148 end_segno = (end >= MAX_BLKADDR(sbi)) ? MAIN_SEGS(sbi) - 1 :
3149 GET_SEGNO(sbi, end);
3151 start_segno = rounddown(start_segno, sbi->segs_per_sec);
3152 end_segno = roundup(end_segno + 1, sbi->segs_per_sec) - 1;
3155 cpc.reason = CP_DISCARD;
3156 cpc.trim_minlen = max_t(__u64, 1, F2FS_BYTES_TO_BLK(range->minlen));
3157 cpc.trim_start = start_segno;
3158 cpc.trim_end = end_segno;
3160 if (sbi->discard_blks == 0)
3163 down_write(&sbi->gc_lock);
3164 err = f2fs_write_checkpoint(sbi, &cpc);
3165 up_write(&sbi->gc_lock);
3170 * We filed discard candidates, but actually we don't need to wait for
3171 * all of them, since they'll be issued in idle time along with runtime
3172 * discard option. User configuration looks like using runtime discard
3173 * or periodic fstrim instead of it.
3175 if (f2fs_realtime_discard_enable(sbi))
3178 start_block = START_BLOCK(sbi, start_segno);
3179 end_block = START_BLOCK(sbi, end_segno + 1);
3181 __init_discard_policy(sbi, &dpolicy, DPOLICY_FSTRIM, cpc.trim_minlen);
3182 trimmed = __issue_discard_cmd_range(sbi, &dpolicy,
3183 start_block, end_block);
3185 trimmed += __wait_discard_cmd_range(sbi, &dpolicy,
3186 start_block, end_block);
3189 range->len = F2FS_BLK_TO_BYTES(trimmed);
3193 static bool __has_curseg_space(struct f2fs_sb_info *sbi,
3194 struct curseg_info *curseg)
3196 return curseg->next_blkoff < f2fs_usable_blks_in_seg(sbi,
3200 int f2fs_rw_hint_to_seg_type(enum rw_hint hint)
3203 case WRITE_LIFE_SHORT:
3204 return CURSEG_HOT_DATA;
3205 case WRITE_LIFE_EXTREME:
3206 return CURSEG_COLD_DATA;
3208 return CURSEG_WARM_DATA;
3212 /* This returns write hints for each segment type. This hints will be
3213 * passed down to block layer. There are mapping tables which depend on
3214 * the mount option 'whint_mode'.
3216 * 1) whint_mode=off. F2FS only passes down WRITE_LIFE_NOT_SET.
3218 * 2) whint_mode=user-based. F2FS tries to pass down hints given by users.
3222 * META WRITE_LIFE_NOT_SET
3226 * ioctl(COLD) COLD_DATA WRITE_LIFE_EXTREME
3227 * extension list " "
3230 * WRITE_LIFE_EXTREME COLD_DATA WRITE_LIFE_EXTREME
3231 * WRITE_LIFE_SHORT HOT_DATA WRITE_LIFE_SHORT
3232 * WRITE_LIFE_NOT_SET WARM_DATA WRITE_LIFE_NOT_SET
3233 * WRITE_LIFE_NONE " "
3234 * WRITE_LIFE_MEDIUM " "
3235 * WRITE_LIFE_LONG " "
3238 * WRITE_LIFE_EXTREME COLD_DATA WRITE_LIFE_EXTREME
3239 * WRITE_LIFE_SHORT HOT_DATA WRITE_LIFE_SHORT
3240 * WRITE_LIFE_NOT_SET WARM_DATA WRITE_LIFE_NOT_SET
3241 * WRITE_LIFE_NONE " WRITE_LIFE_NONE
3242 * WRITE_LIFE_MEDIUM " WRITE_LIFE_MEDIUM
3243 * WRITE_LIFE_LONG " WRITE_LIFE_LONG
3245 * 3) whint_mode=fs-based. F2FS passes down hints with its policy.
3249 * META WRITE_LIFE_MEDIUM;
3250 * HOT_NODE WRITE_LIFE_NOT_SET
3252 * COLD_NODE WRITE_LIFE_NONE
3253 * ioctl(COLD) COLD_DATA WRITE_LIFE_EXTREME
3254 * extension list " "
3257 * WRITE_LIFE_EXTREME COLD_DATA WRITE_LIFE_EXTREME
3258 * WRITE_LIFE_SHORT HOT_DATA WRITE_LIFE_SHORT
3259 * WRITE_LIFE_NOT_SET WARM_DATA WRITE_LIFE_LONG
3260 * WRITE_LIFE_NONE " "
3261 * WRITE_LIFE_MEDIUM " "
3262 * WRITE_LIFE_LONG " "
3265 * WRITE_LIFE_EXTREME COLD_DATA WRITE_LIFE_EXTREME
3266 * WRITE_LIFE_SHORT HOT_DATA WRITE_LIFE_SHORT
3267 * WRITE_LIFE_NOT_SET WARM_DATA WRITE_LIFE_NOT_SET
3268 * WRITE_LIFE_NONE " WRITE_LIFE_NONE
3269 * WRITE_LIFE_MEDIUM " WRITE_LIFE_MEDIUM
3270 * WRITE_LIFE_LONG " WRITE_LIFE_LONG
3273 enum rw_hint f2fs_io_type_to_rw_hint(struct f2fs_sb_info *sbi,
3274 enum page_type type, enum temp_type temp)
3276 if (F2FS_OPTION(sbi).whint_mode == WHINT_MODE_USER) {
3279 return WRITE_LIFE_NOT_SET;
3280 else if (temp == HOT)
3281 return WRITE_LIFE_SHORT;
3282 else if (temp == COLD)
3283 return WRITE_LIFE_EXTREME;
3285 return WRITE_LIFE_NOT_SET;
3287 } else if (F2FS_OPTION(sbi).whint_mode == WHINT_MODE_FS) {
3290 return WRITE_LIFE_LONG;
3291 else if (temp == HOT)
3292 return WRITE_LIFE_SHORT;
3293 else if (temp == COLD)
3294 return WRITE_LIFE_EXTREME;
3295 } else if (type == NODE) {
3296 if (temp == WARM || temp == HOT)
3297 return WRITE_LIFE_NOT_SET;
3298 else if (temp == COLD)
3299 return WRITE_LIFE_NONE;
3300 } else if (type == META) {
3301 return WRITE_LIFE_MEDIUM;
3304 return WRITE_LIFE_NOT_SET;
3307 static int __get_segment_type_2(struct f2fs_io_info *fio)
3309 if (fio->type == DATA)
3310 return CURSEG_HOT_DATA;
3312 return CURSEG_HOT_NODE;
3315 static int __get_segment_type_4(struct f2fs_io_info *fio)
3317 if (fio->type == DATA) {
3318 struct inode *inode = fio->page->mapping->host;
3320 if (S_ISDIR(inode->i_mode))
3321 return CURSEG_HOT_DATA;
3323 return CURSEG_COLD_DATA;
3325 if (IS_DNODE(fio->page) && is_cold_node(fio->page))
3326 return CURSEG_WARM_NODE;
3328 return CURSEG_COLD_NODE;
3332 static int __get_segment_type_6(struct f2fs_io_info *fio)
3334 if (fio->type == DATA) {
3335 struct inode *inode = fio->page->mapping->host;
3337 if (is_inode_flag_set(inode, FI_ALIGNED_WRITE))
3338 return CURSEG_COLD_DATA_PINNED;
3340 if (page_private_gcing(fio->page)) {
3341 if (fio->sbi->am.atgc_enabled &&
3342 (fio->io_type == FS_DATA_IO) &&
3343 (fio->sbi->gc_mode != GC_URGENT_HIGH))
3344 return CURSEG_ALL_DATA_ATGC;
3346 return CURSEG_COLD_DATA;
3348 if (file_is_cold(inode) || f2fs_need_compress_data(inode))
3349 return CURSEG_COLD_DATA;
3350 if (file_is_hot(inode) ||
3351 is_inode_flag_set(inode, FI_HOT_DATA) ||
3352 f2fs_is_atomic_file(inode) ||
3353 f2fs_is_volatile_file(inode))
3354 return CURSEG_HOT_DATA;
3355 return f2fs_rw_hint_to_seg_type(inode->i_write_hint);
3357 if (IS_DNODE(fio->page))
3358 return is_cold_node(fio->page) ? CURSEG_WARM_NODE :
3360 return CURSEG_COLD_NODE;
3364 static int __get_segment_type(struct f2fs_io_info *fio)
3368 switch (F2FS_OPTION(fio->sbi).active_logs) {
3370 type = __get_segment_type_2(fio);
3373 type = __get_segment_type_4(fio);
3376 type = __get_segment_type_6(fio);
3379 f2fs_bug_on(fio->sbi, true);
3384 else if (IS_WARM(type))
3391 void f2fs_allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
3392 block_t old_blkaddr, block_t *new_blkaddr,
3393 struct f2fs_summary *sum, int type,
3394 struct f2fs_io_info *fio)
3396 struct sit_info *sit_i = SIT_I(sbi);
3397 struct curseg_info *curseg = CURSEG_I(sbi, type);
3398 unsigned long long old_mtime;
3399 bool from_gc = (type == CURSEG_ALL_DATA_ATGC);
3400 struct seg_entry *se = NULL;
3402 down_read(&SM_I(sbi)->curseg_lock);
3404 mutex_lock(&curseg->curseg_mutex);
3405 down_write(&sit_i->sentry_lock);
3408 f2fs_bug_on(sbi, GET_SEGNO(sbi, old_blkaddr) == NULL_SEGNO);
3409 se = get_seg_entry(sbi, GET_SEGNO(sbi, old_blkaddr));
3410 sanity_check_seg_type(sbi, se->type);
3411 f2fs_bug_on(sbi, IS_NODESEG(se->type));
3413 *new_blkaddr = NEXT_FREE_BLKADDR(sbi, curseg);
3415 f2fs_bug_on(sbi, curseg->next_blkoff >= sbi->blocks_per_seg);
3417 f2fs_wait_discard_bio(sbi, *new_blkaddr);
3420 * __add_sum_entry should be resided under the curseg_mutex
3421 * because, this function updates a summary entry in the
3422 * current summary block.
3424 __add_sum_entry(sbi, type, sum);
3426 __refresh_next_blkoff(sbi, curseg);
3428 stat_inc_block_count(sbi, curseg);
3431 old_mtime = get_segment_mtime(sbi, old_blkaddr);
3433 update_segment_mtime(sbi, old_blkaddr, 0);
3436 update_segment_mtime(sbi, *new_blkaddr, old_mtime);
3439 * SIT information should be updated before segment allocation,
3440 * since SSR needs latest valid block information.
3442 update_sit_entry(sbi, *new_blkaddr, 1);
3443 if (GET_SEGNO(sbi, old_blkaddr) != NULL_SEGNO)
3444 update_sit_entry(sbi, old_blkaddr, -1);
3446 if (!__has_curseg_space(sbi, curseg)) {
3448 get_atssr_segment(sbi, type, se->type,
3451 sit_i->s_ops->allocate_segment(sbi, type, false);
3454 * segment dirty status should be updated after segment allocation,
3455 * so we just need to update status only one time after previous
3456 * segment being closed.
3458 locate_dirty_segment(sbi, GET_SEGNO(sbi, old_blkaddr));
3459 locate_dirty_segment(sbi, GET_SEGNO(sbi, *new_blkaddr));
3461 up_write(&sit_i->sentry_lock);
3463 if (page && IS_NODESEG(type)) {
3464 fill_node_footer_blkaddr(page, NEXT_FREE_BLKADDR(sbi, curseg));
3466 f2fs_inode_chksum_set(sbi, page);
3470 struct f2fs_bio_info *io;
3472 if (F2FS_IO_ALIGNED(sbi))
3475 INIT_LIST_HEAD(&fio->list);
3476 fio->in_list = true;
3477 io = sbi->write_io[fio->type] + fio->temp;
3478 spin_lock(&io->io_lock);
3479 list_add_tail(&fio->list, &io->io_list);
3480 spin_unlock(&io->io_lock);
3483 mutex_unlock(&curseg->curseg_mutex);
3485 up_read(&SM_I(sbi)->curseg_lock);
3488 static void update_device_state(struct f2fs_io_info *fio)
3490 struct f2fs_sb_info *sbi = fio->sbi;
3491 unsigned int devidx;
3493 if (!f2fs_is_multi_device(sbi))
3496 devidx = f2fs_target_device_index(sbi, fio->new_blkaddr);
3498 /* update device state for fsync */
3499 f2fs_set_dirty_device(sbi, fio->ino, devidx, FLUSH_INO);
3501 /* update device state for checkpoint */
3502 if (!f2fs_test_bit(devidx, (char *)&sbi->dirty_device)) {
3503 spin_lock(&sbi->dev_lock);
3504 f2fs_set_bit(devidx, (char *)&sbi->dirty_device);
3505 spin_unlock(&sbi->dev_lock);
3509 static void do_write_page(struct f2fs_summary *sum, struct f2fs_io_info *fio)
3511 int type = __get_segment_type(fio);
3512 bool keep_order = (f2fs_lfs_mode(fio->sbi) && type == CURSEG_COLD_DATA);
3515 down_read(&fio->sbi->io_order_lock);
3517 f2fs_allocate_data_block(fio->sbi, fio->page, fio->old_blkaddr,
3518 &fio->new_blkaddr, sum, type, fio);
3519 if (GET_SEGNO(fio->sbi, fio->old_blkaddr) != NULL_SEGNO) {
3520 invalidate_mapping_pages(META_MAPPING(fio->sbi),
3521 fio->old_blkaddr, fio->old_blkaddr);
3522 f2fs_invalidate_compress_page(fio->sbi, fio->old_blkaddr);
3525 /* writeout dirty page into bdev */
3526 f2fs_submit_page_write(fio);
3528 fio->old_blkaddr = fio->new_blkaddr;
3532 update_device_state(fio);
3535 up_read(&fio->sbi->io_order_lock);
3538 void f2fs_do_write_meta_page(struct f2fs_sb_info *sbi, struct page *page,
3539 enum iostat_type io_type)
3541 struct f2fs_io_info fio = {
3546 .op_flags = REQ_SYNC | REQ_META | REQ_PRIO,
3547 .old_blkaddr = page->index,
3548 .new_blkaddr = page->index,
3550 .encrypted_page = NULL,
3554 if (unlikely(page->index >= MAIN_BLKADDR(sbi)))
3555 fio.op_flags &= ~REQ_META;
3557 set_page_writeback(page);
3558 ClearPageError(page);
3559 f2fs_submit_page_write(&fio);
3561 stat_inc_meta_count(sbi, page->index);
3562 f2fs_update_iostat(sbi, io_type, F2FS_BLKSIZE);
3565 void f2fs_do_write_node_page(unsigned int nid, struct f2fs_io_info *fio)
3567 struct f2fs_summary sum;
3569 set_summary(&sum, nid, 0, 0);
3570 do_write_page(&sum, fio);
3572 f2fs_update_iostat(fio->sbi, fio->io_type, F2FS_BLKSIZE);
3575 void f2fs_outplace_write_data(struct dnode_of_data *dn,
3576 struct f2fs_io_info *fio)
3578 struct f2fs_sb_info *sbi = fio->sbi;
3579 struct f2fs_summary sum;
3581 f2fs_bug_on(sbi, dn->data_blkaddr == NULL_ADDR);
3582 set_summary(&sum, dn->nid, dn->ofs_in_node, fio->version);
3583 do_write_page(&sum, fio);
3584 f2fs_update_data_blkaddr(dn, fio->new_blkaddr);
3586 f2fs_update_iostat(sbi, fio->io_type, F2FS_BLKSIZE);
3589 int f2fs_inplace_write_data(struct f2fs_io_info *fio)
3592 struct f2fs_sb_info *sbi = fio->sbi;
3595 fio->new_blkaddr = fio->old_blkaddr;
3596 /* i/o temperature is needed for passing down write hints */
3597 __get_segment_type(fio);
3599 segno = GET_SEGNO(sbi, fio->new_blkaddr);
3601 if (!IS_DATASEG(get_seg_entry(sbi, segno)->type)) {
3602 set_sbi_flag(sbi, SBI_NEED_FSCK);
3603 f2fs_warn(sbi, "%s: incorrect segment(%u) type, run fsck to fix.",
3605 err = -EFSCORRUPTED;
3609 if (f2fs_cp_error(sbi)) {
3614 stat_inc_inplace_blocks(fio->sbi);
3616 if (fio->bio && !(SM_I(sbi)->ipu_policy & (1 << F2FS_IPU_NOCACHE)))
3617 err = f2fs_merge_page_bio(fio);
3619 err = f2fs_submit_page_bio(fio);
3621 update_device_state(fio);
3622 f2fs_update_iostat(fio->sbi, fio->io_type, F2FS_BLKSIZE);
3627 if (fio->bio && *(fio->bio)) {
3628 struct bio *bio = *(fio->bio);
3630 bio->bi_status = BLK_STS_IOERR;
3637 static inline int __f2fs_get_curseg(struct f2fs_sb_info *sbi,
3642 for (i = CURSEG_HOT_DATA; i < NO_CHECK_TYPE; i++) {
3643 if (CURSEG_I(sbi, i)->segno == segno)
3649 void f2fs_do_replace_block(struct f2fs_sb_info *sbi, struct f2fs_summary *sum,
3650 block_t old_blkaddr, block_t new_blkaddr,
3651 bool recover_curseg, bool recover_newaddr,
3654 struct sit_info *sit_i = SIT_I(sbi);
3655 struct curseg_info *curseg;
3656 unsigned int segno, old_cursegno;
3657 struct seg_entry *se;
3659 unsigned short old_blkoff;
3660 unsigned char old_alloc_type;
3662 segno = GET_SEGNO(sbi, new_blkaddr);
3663 se = get_seg_entry(sbi, segno);
3666 down_write(&SM_I(sbi)->curseg_lock);
3668 if (!recover_curseg) {
3669 /* for recovery flow */
3670 if (se->valid_blocks == 0 && !IS_CURSEG(sbi, segno)) {
3671 if (old_blkaddr == NULL_ADDR)
3672 type = CURSEG_COLD_DATA;
3674 type = CURSEG_WARM_DATA;
3677 if (IS_CURSEG(sbi, segno)) {
3678 /* se->type is volatile as SSR allocation */
3679 type = __f2fs_get_curseg(sbi, segno);
3680 f2fs_bug_on(sbi, type == NO_CHECK_TYPE);
3682 type = CURSEG_WARM_DATA;
3686 f2fs_bug_on(sbi, !IS_DATASEG(type));
3687 curseg = CURSEG_I(sbi, type);
3689 mutex_lock(&curseg->curseg_mutex);
3690 down_write(&sit_i->sentry_lock);
3692 old_cursegno = curseg->segno;
3693 old_blkoff = curseg->next_blkoff;
3694 old_alloc_type = curseg->alloc_type;
3696 /* change the current segment */
3697 if (segno != curseg->segno) {
3698 curseg->next_segno = segno;
3699 change_curseg(sbi, type, true);
3702 curseg->next_blkoff = GET_BLKOFF_FROM_SEG0(sbi, new_blkaddr);
3703 __add_sum_entry(sbi, type, sum);
3705 if (!recover_curseg || recover_newaddr) {
3707 update_segment_mtime(sbi, new_blkaddr, 0);
3708 update_sit_entry(sbi, new_blkaddr, 1);
3710 if (GET_SEGNO(sbi, old_blkaddr) != NULL_SEGNO) {
3711 invalidate_mapping_pages(META_MAPPING(sbi),
3712 old_blkaddr, old_blkaddr);
3713 f2fs_invalidate_compress_page(sbi, old_blkaddr);
3715 update_segment_mtime(sbi, old_blkaddr, 0);
3716 update_sit_entry(sbi, old_blkaddr, -1);
3719 locate_dirty_segment(sbi, GET_SEGNO(sbi, old_blkaddr));
3720 locate_dirty_segment(sbi, GET_SEGNO(sbi, new_blkaddr));
3722 locate_dirty_segment(sbi, old_cursegno);
3724 if (recover_curseg) {
3725 if (old_cursegno != curseg->segno) {
3726 curseg->next_segno = old_cursegno;
3727 change_curseg(sbi, type, true);
3729 curseg->next_blkoff = old_blkoff;
3730 curseg->alloc_type = old_alloc_type;
3733 up_write(&sit_i->sentry_lock);
3734 mutex_unlock(&curseg->curseg_mutex);
3735 up_write(&SM_I(sbi)->curseg_lock);
3738 void f2fs_replace_block(struct f2fs_sb_info *sbi, struct dnode_of_data *dn,
3739 block_t old_addr, block_t new_addr,
3740 unsigned char version, bool recover_curseg,
3741 bool recover_newaddr)
3743 struct f2fs_summary sum;
3745 set_summary(&sum, dn->nid, dn->ofs_in_node, version);
3747 f2fs_do_replace_block(sbi, &sum, old_addr, new_addr,
3748 recover_curseg, recover_newaddr, false);
3750 f2fs_update_data_blkaddr(dn, new_addr);
3753 void f2fs_wait_on_page_writeback(struct page *page,
3754 enum page_type type, bool ordered, bool locked)
3756 if (PageWriteback(page)) {
3757 struct f2fs_sb_info *sbi = F2FS_P_SB(page);
3759 /* submit cached LFS IO */
3760 f2fs_submit_merged_write_cond(sbi, NULL, page, 0, type);
3761 /* sbumit cached IPU IO */
3762 f2fs_submit_merged_ipu_write(sbi, NULL, page);
3764 wait_on_page_writeback(page);
3765 f2fs_bug_on(sbi, locked && PageWriteback(page));
3767 wait_for_stable_page(page);
3772 void f2fs_wait_on_block_writeback(struct inode *inode, block_t blkaddr)
3774 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
3777 if (!f2fs_post_read_required(inode))
3780 if (!__is_valid_data_blkaddr(blkaddr))
3783 cpage = find_lock_page(META_MAPPING(sbi), blkaddr);
3785 f2fs_wait_on_page_writeback(cpage, DATA, true, true);
3786 f2fs_put_page(cpage, 1);
3790 void f2fs_wait_on_block_writeback_range(struct inode *inode, block_t blkaddr,
3795 for (i = 0; i < len; i++)
3796 f2fs_wait_on_block_writeback(inode, blkaddr + i);
3799 static int read_compacted_summaries(struct f2fs_sb_info *sbi)
3801 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
3802 struct curseg_info *seg_i;
3803 unsigned char *kaddr;
3808 start = start_sum_block(sbi);
3810 page = f2fs_get_meta_page(sbi, start++);
3812 return PTR_ERR(page);
3813 kaddr = (unsigned char *)page_address(page);
3815 /* Step 1: restore nat cache */
3816 seg_i = CURSEG_I(sbi, CURSEG_HOT_DATA);
3817 memcpy(seg_i->journal, kaddr, SUM_JOURNAL_SIZE);
3819 /* Step 2: restore sit cache */
3820 seg_i = CURSEG_I(sbi, CURSEG_COLD_DATA);
3821 memcpy(seg_i->journal, kaddr + SUM_JOURNAL_SIZE, SUM_JOURNAL_SIZE);
3822 offset = 2 * SUM_JOURNAL_SIZE;
3824 /* Step 3: restore summary entries */
3825 for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) {
3826 unsigned short blk_off;
3829 seg_i = CURSEG_I(sbi, i);
3830 segno = le32_to_cpu(ckpt->cur_data_segno[i]);
3831 blk_off = le16_to_cpu(ckpt->cur_data_blkoff[i]);
3832 seg_i->next_segno = segno;
3833 reset_curseg(sbi, i, 0);
3834 seg_i->alloc_type = ckpt->alloc_type[i];
3835 seg_i->next_blkoff = blk_off;
3837 if (seg_i->alloc_type == SSR)
3838 blk_off = sbi->blocks_per_seg;
3840 for (j = 0; j < blk_off; j++) {
3841 struct f2fs_summary *s;
3843 s = (struct f2fs_summary *)(kaddr + offset);
3844 seg_i->sum_blk->entries[j] = *s;
3845 offset += SUMMARY_SIZE;
3846 if (offset + SUMMARY_SIZE <= PAGE_SIZE -
3850 f2fs_put_page(page, 1);
3853 page = f2fs_get_meta_page(sbi, start++);
3855 return PTR_ERR(page);
3856 kaddr = (unsigned char *)page_address(page);
3860 f2fs_put_page(page, 1);
3864 static int read_normal_summaries(struct f2fs_sb_info *sbi, int type)
3866 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
3867 struct f2fs_summary_block *sum;
3868 struct curseg_info *curseg;
3870 unsigned short blk_off;
3871 unsigned int segno = 0;
3872 block_t blk_addr = 0;
3875 /* get segment number and block addr */
3876 if (IS_DATASEG(type)) {
3877 segno = le32_to_cpu(ckpt->cur_data_segno[type]);
3878 blk_off = le16_to_cpu(ckpt->cur_data_blkoff[type -
3880 if (__exist_node_summaries(sbi))
3881 blk_addr = sum_blk_addr(sbi, NR_CURSEG_PERSIST_TYPE, type);
3883 blk_addr = sum_blk_addr(sbi, NR_CURSEG_DATA_TYPE, type);
3885 segno = le32_to_cpu(ckpt->cur_node_segno[type -
3887 blk_off = le16_to_cpu(ckpt->cur_node_blkoff[type -
3889 if (__exist_node_summaries(sbi))
3890 blk_addr = sum_blk_addr(sbi, NR_CURSEG_NODE_TYPE,
3891 type - CURSEG_HOT_NODE);
3893 blk_addr = GET_SUM_BLOCK(sbi, segno);
3896 new = f2fs_get_meta_page(sbi, blk_addr);
3898 return PTR_ERR(new);
3899 sum = (struct f2fs_summary_block *)page_address(new);
3901 if (IS_NODESEG(type)) {
3902 if (__exist_node_summaries(sbi)) {
3903 struct f2fs_summary *ns = &sum->entries[0];
3906 for (i = 0; i < sbi->blocks_per_seg; i++, ns++) {
3908 ns->ofs_in_node = 0;
3911 err = f2fs_restore_node_summary(sbi, segno, sum);
3917 /* set uncompleted segment to curseg */
3918 curseg = CURSEG_I(sbi, type);
3919 mutex_lock(&curseg->curseg_mutex);
3921 /* update journal info */
3922 down_write(&curseg->journal_rwsem);
3923 memcpy(curseg->journal, &sum->journal, SUM_JOURNAL_SIZE);
3924 up_write(&curseg->journal_rwsem);
3926 memcpy(curseg->sum_blk->entries, sum->entries, SUM_ENTRY_SIZE);
3927 memcpy(&curseg->sum_blk->footer, &sum->footer, SUM_FOOTER_SIZE);
3928 curseg->next_segno = segno;
3929 reset_curseg(sbi, type, 0);
3930 curseg->alloc_type = ckpt->alloc_type[type];
3931 curseg->next_blkoff = blk_off;
3932 mutex_unlock(&curseg->curseg_mutex);
3934 f2fs_put_page(new, 1);
3938 static int restore_curseg_summaries(struct f2fs_sb_info *sbi)
3940 struct f2fs_journal *sit_j = CURSEG_I(sbi, CURSEG_COLD_DATA)->journal;
3941 struct f2fs_journal *nat_j = CURSEG_I(sbi, CURSEG_HOT_DATA)->journal;
3942 int type = CURSEG_HOT_DATA;
3945 if (is_set_ckpt_flags(sbi, CP_COMPACT_SUM_FLAG)) {
3946 int npages = f2fs_npages_for_summary_flush(sbi, true);
3949 f2fs_ra_meta_pages(sbi, start_sum_block(sbi), npages,
3952 /* restore for compacted data summary */
3953 err = read_compacted_summaries(sbi);
3956 type = CURSEG_HOT_NODE;
3959 if (__exist_node_summaries(sbi))
3960 f2fs_ra_meta_pages(sbi,
3961 sum_blk_addr(sbi, NR_CURSEG_PERSIST_TYPE, type),
3962 NR_CURSEG_PERSIST_TYPE - type, META_CP, true);
3964 for (; type <= CURSEG_COLD_NODE; type++) {
3965 err = read_normal_summaries(sbi, type);
3970 /* sanity check for summary blocks */
3971 if (nats_in_cursum(nat_j) > NAT_JOURNAL_ENTRIES ||
3972 sits_in_cursum(sit_j) > SIT_JOURNAL_ENTRIES) {
3973 f2fs_err(sbi, "invalid journal entries nats %u sits %u",
3974 nats_in_cursum(nat_j), sits_in_cursum(sit_j));
3981 static void write_compacted_summaries(struct f2fs_sb_info *sbi, block_t blkaddr)
3984 unsigned char *kaddr;
3985 struct f2fs_summary *summary;
3986 struct curseg_info *seg_i;
3987 int written_size = 0;
3990 page = f2fs_grab_meta_page(sbi, blkaddr++);
3991 kaddr = (unsigned char *)page_address(page);
3992 memset(kaddr, 0, PAGE_SIZE);
3994 /* Step 1: write nat cache */
3995 seg_i = CURSEG_I(sbi, CURSEG_HOT_DATA);
3996 memcpy(kaddr, seg_i->journal, SUM_JOURNAL_SIZE);
3997 written_size += SUM_JOURNAL_SIZE;
3999 /* Step 2: write sit cache */
4000 seg_i = CURSEG_I(sbi, CURSEG_COLD_DATA);
4001 memcpy(kaddr + written_size, seg_i->journal, SUM_JOURNAL_SIZE);
4002 written_size += SUM_JOURNAL_SIZE;
4004 /* Step 3: write summary entries */
4005 for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) {
4006 unsigned short blkoff;
4008 seg_i = CURSEG_I(sbi, i);
4009 if (sbi->ckpt->alloc_type[i] == SSR)
4010 blkoff = sbi->blocks_per_seg;
4012 blkoff = curseg_blkoff(sbi, i);
4014 for (j = 0; j < blkoff; j++) {
4016 page = f2fs_grab_meta_page(sbi, blkaddr++);
4017 kaddr = (unsigned char *)page_address(page);
4018 memset(kaddr, 0, PAGE_SIZE);
4021 summary = (struct f2fs_summary *)(kaddr + written_size);
4022 *summary = seg_i->sum_blk->entries[j];
4023 written_size += SUMMARY_SIZE;
4025 if (written_size + SUMMARY_SIZE <= PAGE_SIZE -
4029 set_page_dirty(page);
4030 f2fs_put_page(page, 1);
4035 set_page_dirty(page);
4036 f2fs_put_page(page, 1);
4040 static void write_normal_summaries(struct f2fs_sb_info *sbi,
4041 block_t blkaddr, int type)
4045 if (IS_DATASEG(type))
4046 end = type + NR_CURSEG_DATA_TYPE;
4048 end = type + NR_CURSEG_NODE_TYPE;
4050 for (i = type; i < end; i++)
4051 write_current_sum_page(sbi, i, blkaddr + (i - type));
4054 void f2fs_write_data_summaries(struct f2fs_sb_info *sbi, block_t start_blk)
4056 if (is_set_ckpt_flags(sbi, CP_COMPACT_SUM_FLAG))
4057 write_compacted_summaries(sbi, start_blk);
4059 write_normal_summaries(sbi, start_blk, CURSEG_HOT_DATA);
4062 void f2fs_write_node_summaries(struct f2fs_sb_info *sbi, block_t start_blk)
4064 write_normal_summaries(sbi, start_blk, CURSEG_HOT_NODE);
4067 int f2fs_lookup_journal_in_cursum(struct f2fs_journal *journal, int type,
4068 unsigned int val, int alloc)
4072 if (type == NAT_JOURNAL) {
4073 for (i = 0; i < nats_in_cursum(journal); i++) {
4074 if (le32_to_cpu(nid_in_journal(journal, i)) == val)
4077 if (alloc && __has_cursum_space(journal, 1, NAT_JOURNAL))
4078 return update_nats_in_cursum(journal, 1);
4079 } else if (type == SIT_JOURNAL) {
4080 for (i = 0; i < sits_in_cursum(journal); i++)
4081 if (le32_to_cpu(segno_in_journal(journal, i)) == val)
4083 if (alloc && __has_cursum_space(journal, 1, SIT_JOURNAL))
4084 return update_sits_in_cursum(journal, 1);
4089 static struct page *get_current_sit_page(struct f2fs_sb_info *sbi,
4092 return f2fs_get_meta_page(sbi, current_sit_addr(sbi, segno));
4095 static struct page *get_next_sit_page(struct f2fs_sb_info *sbi,
4098 struct sit_info *sit_i = SIT_I(sbi);
4100 pgoff_t src_off, dst_off;
4102 src_off = current_sit_addr(sbi, start);
4103 dst_off = next_sit_addr(sbi, src_off);
4105 page = f2fs_grab_meta_page(sbi, dst_off);
4106 seg_info_to_sit_page(sbi, page, start);
4108 set_page_dirty(page);
4109 set_to_next_sit(sit_i, start);
4114 static struct sit_entry_set *grab_sit_entry_set(void)
4116 struct sit_entry_set *ses =
4117 f2fs_kmem_cache_alloc(sit_entry_set_slab,
4118 GFP_NOFS, true, NULL);
4121 INIT_LIST_HEAD(&ses->set_list);
4125 static void release_sit_entry_set(struct sit_entry_set *ses)
4127 list_del(&ses->set_list);
4128 kmem_cache_free(sit_entry_set_slab, ses);
4131 static void adjust_sit_entry_set(struct sit_entry_set *ses,
4132 struct list_head *head)
4134 struct sit_entry_set *next = ses;
4136 if (list_is_last(&ses->set_list, head))
4139 list_for_each_entry_continue(next, head, set_list)
4140 if (ses->entry_cnt <= next->entry_cnt)
4143 list_move_tail(&ses->set_list, &next->set_list);
4146 static void add_sit_entry(unsigned int segno, struct list_head *head)
4148 struct sit_entry_set *ses;
4149 unsigned int start_segno = START_SEGNO(segno);
4151 list_for_each_entry(ses, head, set_list) {
4152 if (ses->start_segno == start_segno) {
4154 adjust_sit_entry_set(ses, head);
4159 ses = grab_sit_entry_set();
4161 ses->start_segno = start_segno;
4163 list_add(&ses->set_list, head);
4166 static void add_sits_in_set(struct f2fs_sb_info *sbi)
4168 struct f2fs_sm_info *sm_info = SM_I(sbi);
4169 struct list_head *set_list = &sm_info->sit_entry_set;
4170 unsigned long *bitmap = SIT_I(sbi)->dirty_sentries_bitmap;
4173 for_each_set_bit(segno, bitmap, MAIN_SEGS(sbi))
4174 add_sit_entry(segno, set_list);
4177 static void remove_sits_in_journal(struct f2fs_sb_info *sbi)
4179 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA);
4180 struct f2fs_journal *journal = curseg->journal;
4183 down_write(&curseg->journal_rwsem);
4184 for (i = 0; i < sits_in_cursum(journal); i++) {
4188 segno = le32_to_cpu(segno_in_journal(journal, i));
4189 dirtied = __mark_sit_entry_dirty(sbi, segno);
4192 add_sit_entry(segno, &SM_I(sbi)->sit_entry_set);
4194 update_sits_in_cursum(journal, -i);
4195 up_write(&curseg->journal_rwsem);
4199 * CP calls this function, which flushes SIT entries including sit_journal,
4200 * and moves prefree segs to free segs.
4202 void f2fs_flush_sit_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc)
4204 struct sit_info *sit_i = SIT_I(sbi);
4205 unsigned long *bitmap = sit_i->dirty_sentries_bitmap;
4206 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA);
4207 struct f2fs_journal *journal = curseg->journal;
4208 struct sit_entry_set *ses, *tmp;
4209 struct list_head *head = &SM_I(sbi)->sit_entry_set;
4210 bool to_journal = !is_sbi_flag_set(sbi, SBI_IS_RESIZEFS);
4211 struct seg_entry *se;
4213 down_write(&sit_i->sentry_lock);
4215 if (!sit_i->dirty_sentries)
4219 * add and account sit entries of dirty bitmap in sit entry
4222 add_sits_in_set(sbi);
4225 * if there are no enough space in journal to store dirty sit
4226 * entries, remove all entries from journal and add and account
4227 * them in sit entry set.
4229 if (!__has_cursum_space(journal, sit_i->dirty_sentries, SIT_JOURNAL) ||
4231 remove_sits_in_journal(sbi);
4234 * there are two steps to flush sit entries:
4235 * #1, flush sit entries to journal in current cold data summary block.
4236 * #2, flush sit entries to sit page.
4238 list_for_each_entry_safe(ses, tmp, head, set_list) {
4239 struct page *page = NULL;
4240 struct f2fs_sit_block *raw_sit = NULL;
4241 unsigned int start_segno = ses->start_segno;
4242 unsigned int end = min(start_segno + SIT_ENTRY_PER_BLOCK,
4243 (unsigned long)MAIN_SEGS(sbi));
4244 unsigned int segno = start_segno;
4247 !__has_cursum_space(journal, ses->entry_cnt, SIT_JOURNAL))
4251 down_write(&curseg->journal_rwsem);
4253 page = get_next_sit_page(sbi, start_segno);
4254 raw_sit = page_address(page);
4257 /* flush dirty sit entries in region of current sit set */
4258 for_each_set_bit_from(segno, bitmap, end) {
4259 int offset, sit_offset;
4261 se = get_seg_entry(sbi, segno);
4262 #ifdef CONFIG_F2FS_CHECK_FS
4263 if (memcmp(se->cur_valid_map, se->cur_valid_map_mir,
4264 SIT_VBLOCK_MAP_SIZE))
4265 f2fs_bug_on(sbi, 1);
4268 /* add discard candidates */
4269 if (!(cpc->reason & CP_DISCARD)) {
4270 cpc->trim_start = segno;
4271 add_discard_addrs(sbi, cpc, false);
4275 offset = f2fs_lookup_journal_in_cursum(journal,
4276 SIT_JOURNAL, segno, 1);
4277 f2fs_bug_on(sbi, offset < 0);
4278 segno_in_journal(journal, offset) =
4280 seg_info_to_raw_sit(se,
4281 &sit_in_journal(journal, offset));
4282 check_block_count(sbi, segno,
4283 &sit_in_journal(journal, offset));
4285 sit_offset = SIT_ENTRY_OFFSET(sit_i, segno);
4286 seg_info_to_raw_sit(se,
4287 &raw_sit->entries[sit_offset]);
4288 check_block_count(sbi, segno,
4289 &raw_sit->entries[sit_offset]);
4292 __clear_bit(segno, bitmap);
4293 sit_i->dirty_sentries--;
4298 up_write(&curseg->journal_rwsem);
4300 f2fs_put_page(page, 1);
4302 f2fs_bug_on(sbi, ses->entry_cnt);
4303 release_sit_entry_set(ses);
4306 f2fs_bug_on(sbi, !list_empty(head));
4307 f2fs_bug_on(sbi, sit_i->dirty_sentries);
4309 if (cpc->reason & CP_DISCARD) {
4310 __u64 trim_start = cpc->trim_start;
4312 for (; cpc->trim_start <= cpc->trim_end; cpc->trim_start++)
4313 add_discard_addrs(sbi, cpc, false);
4315 cpc->trim_start = trim_start;
4317 up_write(&sit_i->sentry_lock);
4319 set_prefree_as_free_segments(sbi);
4322 static int build_sit_info(struct f2fs_sb_info *sbi)
4324 struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
4325 struct sit_info *sit_i;
4326 unsigned int sit_segs, start;
4327 char *src_bitmap, *bitmap;
4328 unsigned int bitmap_size, main_bitmap_size, sit_bitmap_size;
4329 unsigned int discard_map = f2fs_block_unit_discard(sbi) ? 1 : 0;
4331 /* allocate memory for SIT information */
4332 sit_i = f2fs_kzalloc(sbi, sizeof(struct sit_info), GFP_KERNEL);
4336 SM_I(sbi)->sit_info = sit_i;
4339 f2fs_kvzalloc(sbi, array_size(sizeof(struct seg_entry),
4342 if (!sit_i->sentries)
4345 main_bitmap_size = f2fs_bitmap_size(MAIN_SEGS(sbi));
4346 sit_i->dirty_sentries_bitmap = f2fs_kvzalloc(sbi, main_bitmap_size,
4348 if (!sit_i->dirty_sentries_bitmap)
4351 #ifdef CONFIG_F2FS_CHECK_FS
4352 bitmap_size = MAIN_SEGS(sbi) * SIT_VBLOCK_MAP_SIZE * (3 + discard_map);
4354 bitmap_size = MAIN_SEGS(sbi) * SIT_VBLOCK_MAP_SIZE * (2 + discard_map);
4356 sit_i->bitmap = f2fs_kvzalloc(sbi, bitmap_size, GFP_KERNEL);
4360 bitmap = sit_i->bitmap;
4362 for (start = 0; start < MAIN_SEGS(sbi); start++) {
4363 sit_i->sentries[start].cur_valid_map = bitmap;
4364 bitmap += SIT_VBLOCK_MAP_SIZE;
4366 sit_i->sentries[start].ckpt_valid_map = bitmap;
4367 bitmap += SIT_VBLOCK_MAP_SIZE;
4369 #ifdef CONFIG_F2FS_CHECK_FS
4370 sit_i->sentries[start].cur_valid_map_mir = bitmap;
4371 bitmap += SIT_VBLOCK_MAP_SIZE;
4375 sit_i->sentries[start].discard_map = bitmap;
4376 bitmap += SIT_VBLOCK_MAP_SIZE;
4380 sit_i->tmp_map = f2fs_kzalloc(sbi, SIT_VBLOCK_MAP_SIZE, GFP_KERNEL);
4381 if (!sit_i->tmp_map)
4384 if (__is_large_section(sbi)) {
4385 sit_i->sec_entries =
4386 f2fs_kvzalloc(sbi, array_size(sizeof(struct sec_entry),
4389 if (!sit_i->sec_entries)
4393 /* get information related with SIT */
4394 sit_segs = le32_to_cpu(raw_super->segment_count_sit) >> 1;
4396 /* setup SIT bitmap from ckeckpoint pack */
4397 sit_bitmap_size = __bitmap_size(sbi, SIT_BITMAP);
4398 src_bitmap = __bitmap_ptr(sbi, SIT_BITMAP);
4400 sit_i->sit_bitmap = kmemdup(src_bitmap, sit_bitmap_size, GFP_KERNEL);
4401 if (!sit_i->sit_bitmap)
4404 #ifdef CONFIG_F2FS_CHECK_FS
4405 sit_i->sit_bitmap_mir = kmemdup(src_bitmap,
4406 sit_bitmap_size, GFP_KERNEL);
4407 if (!sit_i->sit_bitmap_mir)
4410 sit_i->invalid_segmap = f2fs_kvzalloc(sbi,
4411 main_bitmap_size, GFP_KERNEL);
4412 if (!sit_i->invalid_segmap)
4416 /* init SIT information */
4417 sit_i->s_ops = &default_salloc_ops;
4419 sit_i->sit_base_addr = le32_to_cpu(raw_super->sit_blkaddr);
4420 sit_i->sit_blocks = sit_segs << sbi->log_blocks_per_seg;
4421 sit_i->written_valid_blocks = 0;
4422 sit_i->bitmap_size = sit_bitmap_size;
4423 sit_i->dirty_sentries = 0;
4424 sit_i->sents_per_block = SIT_ENTRY_PER_BLOCK;
4425 sit_i->elapsed_time = le64_to_cpu(sbi->ckpt->elapsed_time);
4426 sit_i->mounted_time = ktime_get_boottime_seconds();
4427 init_rwsem(&sit_i->sentry_lock);
4431 static int build_free_segmap(struct f2fs_sb_info *sbi)
4433 struct free_segmap_info *free_i;
4434 unsigned int bitmap_size, sec_bitmap_size;
4436 /* allocate memory for free segmap information */
4437 free_i = f2fs_kzalloc(sbi, sizeof(struct free_segmap_info), GFP_KERNEL);
4441 SM_I(sbi)->free_info = free_i;
4443 bitmap_size = f2fs_bitmap_size(MAIN_SEGS(sbi));
4444 free_i->free_segmap = f2fs_kvmalloc(sbi, bitmap_size, GFP_KERNEL);
4445 if (!free_i->free_segmap)
4448 sec_bitmap_size = f2fs_bitmap_size(MAIN_SECS(sbi));
4449 free_i->free_secmap = f2fs_kvmalloc(sbi, sec_bitmap_size, GFP_KERNEL);
4450 if (!free_i->free_secmap)
4453 /* set all segments as dirty temporarily */
4454 memset(free_i->free_segmap, 0xff, bitmap_size);
4455 memset(free_i->free_secmap, 0xff, sec_bitmap_size);
4457 /* init free segmap information */
4458 free_i->start_segno = GET_SEGNO_FROM_SEG0(sbi, MAIN_BLKADDR(sbi));
4459 free_i->free_segments = 0;
4460 free_i->free_sections = 0;
4461 spin_lock_init(&free_i->segmap_lock);
4465 static int build_curseg(struct f2fs_sb_info *sbi)
4467 struct curseg_info *array;
4470 array = f2fs_kzalloc(sbi, array_size(NR_CURSEG_TYPE,
4471 sizeof(*array)), GFP_KERNEL);
4475 SM_I(sbi)->curseg_array = array;
4477 for (i = 0; i < NO_CHECK_TYPE; i++) {
4478 mutex_init(&array[i].curseg_mutex);
4479 array[i].sum_blk = f2fs_kzalloc(sbi, PAGE_SIZE, GFP_KERNEL);
4480 if (!array[i].sum_blk)
4482 init_rwsem(&array[i].journal_rwsem);
4483 array[i].journal = f2fs_kzalloc(sbi,
4484 sizeof(struct f2fs_journal), GFP_KERNEL);
4485 if (!array[i].journal)
4487 if (i < NR_PERSISTENT_LOG)
4488 array[i].seg_type = CURSEG_HOT_DATA + i;
4489 else if (i == CURSEG_COLD_DATA_PINNED)
4490 array[i].seg_type = CURSEG_COLD_DATA;
4491 else if (i == CURSEG_ALL_DATA_ATGC)
4492 array[i].seg_type = CURSEG_COLD_DATA;
4493 array[i].segno = NULL_SEGNO;
4494 array[i].next_blkoff = 0;
4495 array[i].inited = false;
4497 return restore_curseg_summaries(sbi);
4500 static int build_sit_entries(struct f2fs_sb_info *sbi)
4502 struct sit_info *sit_i = SIT_I(sbi);
4503 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA);
4504 struct f2fs_journal *journal = curseg->journal;
4505 struct seg_entry *se;
4506 struct f2fs_sit_entry sit;
4507 int sit_blk_cnt = SIT_BLK_CNT(sbi);
4508 unsigned int i, start, end;
4509 unsigned int readed, start_blk = 0;
4511 block_t total_node_blocks = 0;
4514 readed = f2fs_ra_meta_pages(sbi, start_blk, BIO_MAX_VECS,
4517 start = start_blk * sit_i->sents_per_block;
4518 end = (start_blk + readed) * sit_i->sents_per_block;
4520 for (; start < end && start < MAIN_SEGS(sbi); start++) {
4521 struct f2fs_sit_block *sit_blk;
4524 se = &sit_i->sentries[start];
4525 page = get_current_sit_page(sbi, start);
4527 return PTR_ERR(page);
4528 sit_blk = (struct f2fs_sit_block *)page_address(page);
4529 sit = sit_blk->entries[SIT_ENTRY_OFFSET(sit_i, start)];
4530 f2fs_put_page(page, 1);
4532 err = check_block_count(sbi, start, &sit);
4535 seg_info_from_raw_sit(se, &sit);
4536 if (IS_NODESEG(se->type))
4537 total_node_blocks += se->valid_blocks;
4539 if (f2fs_block_unit_discard(sbi)) {
4540 /* build discard map only one time */
4541 if (is_set_ckpt_flags(sbi, CP_TRIMMED_FLAG)) {
4542 memset(se->discard_map, 0xff,
4543 SIT_VBLOCK_MAP_SIZE);
4545 memcpy(se->discard_map,
4547 SIT_VBLOCK_MAP_SIZE);
4548 sbi->discard_blks +=
4549 sbi->blocks_per_seg -
4554 if (__is_large_section(sbi))
4555 get_sec_entry(sbi, start)->valid_blocks +=
4558 start_blk += readed;
4559 } while (start_blk < sit_blk_cnt);
4561 down_read(&curseg->journal_rwsem);
4562 for (i = 0; i < sits_in_cursum(journal); i++) {
4563 unsigned int old_valid_blocks;
4565 start = le32_to_cpu(segno_in_journal(journal, i));
4566 if (start >= MAIN_SEGS(sbi)) {
4567 f2fs_err(sbi, "Wrong journal entry on segno %u",
4569 err = -EFSCORRUPTED;
4573 se = &sit_i->sentries[start];
4574 sit = sit_in_journal(journal, i);
4576 old_valid_blocks = se->valid_blocks;
4577 if (IS_NODESEG(se->type))
4578 total_node_blocks -= old_valid_blocks;
4580 err = check_block_count(sbi, start, &sit);
4583 seg_info_from_raw_sit(se, &sit);
4584 if (IS_NODESEG(se->type))
4585 total_node_blocks += se->valid_blocks;
4587 if (f2fs_block_unit_discard(sbi)) {
4588 if (is_set_ckpt_flags(sbi, CP_TRIMMED_FLAG)) {
4589 memset(se->discard_map, 0xff, SIT_VBLOCK_MAP_SIZE);
4591 memcpy(se->discard_map, se->cur_valid_map,
4592 SIT_VBLOCK_MAP_SIZE);
4593 sbi->discard_blks += old_valid_blocks;
4594 sbi->discard_blks -= se->valid_blocks;
4598 if (__is_large_section(sbi)) {
4599 get_sec_entry(sbi, start)->valid_blocks +=
4601 get_sec_entry(sbi, start)->valid_blocks -=
4605 up_read(&curseg->journal_rwsem);
4607 if (!err && total_node_blocks != valid_node_count(sbi)) {
4608 f2fs_err(sbi, "SIT is corrupted node# %u vs %u",
4609 total_node_blocks, valid_node_count(sbi));
4610 err = -EFSCORRUPTED;
4616 static void init_free_segmap(struct f2fs_sb_info *sbi)
4620 struct seg_entry *sentry;
4622 for (start = 0; start < MAIN_SEGS(sbi); start++) {
4623 if (f2fs_usable_blks_in_seg(sbi, start) == 0)
4625 sentry = get_seg_entry(sbi, start);
4626 if (!sentry->valid_blocks)
4627 __set_free(sbi, start);
4629 SIT_I(sbi)->written_valid_blocks +=
4630 sentry->valid_blocks;
4633 /* set use the current segments */
4634 for (type = CURSEG_HOT_DATA; type <= CURSEG_COLD_NODE; type++) {
4635 struct curseg_info *curseg_t = CURSEG_I(sbi, type);
4637 __set_test_and_inuse(sbi, curseg_t->segno);
4641 static void init_dirty_segmap(struct f2fs_sb_info *sbi)
4643 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
4644 struct free_segmap_info *free_i = FREE_I(sbi);
4645 unsigned int segno = 0, offset = 0, secno;
4646 block_t valid_blocks, usable_blks_in_seg;
4647 block_t blks_per_sec = BLKS_PER_SEC(sbi);
4650 /* find dirty segment based on free segmap */
4651 segno = find_next_inuse(free_i, MAIN_SEGS(sbi), offset);
4652 if (segno >= MAIN_SEGS(sbi))
4655 valid_blocks = get_valid_blocks(sbi, segno, false);
4656 usable_blks_in_seg = f2fs_usable_blks_in_seg(sbi, segno);
4657 if (valid_blocks == usable_blks_in_seg || !valid_blocks)
4659 if (valid_blocks > usable_blks_in_seg) {
4660 f2fs_bug_on(sbi, 1);
4663 mutex_lock(&dirty_i->seglist_lock);
4664 __locate_dirty_segment(sbi, segno, DIRTY);
4665 mutex_unlock(&dirty_i->seglist_lock);
4668 if (!__is_large_section(sbi))
4671 mutex_lock(&dirty_i->seglist_lock);
4672 for (segno = 0; segno < MAIN_SEGS(sbi); segno += sbi->segs_per_sec) {
4673 valid_blocks = get_valid_blocks(sbi, segno, true);
4674 secno = GET_SEC_FROM_SEG(sbi, segno);
4676 if (!valid_blocks || valid_blocks == blks_per_sec)
4678 if (IS_CURSEC(sbi, secno))
4680 set_bit(secno, dirty_i->dirty_secmap);
4682 mutex_unlock(&dirty_i->seglist_lock);
4685 static int init_victim_secmap(struct f2fs_sb_info *sbi)
4687 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
4688 unsigned int bitmap_size = f2fs_bitmap_size(MAIN_SECS(sbi));
4690 dirty_i->victim_secmap = f2fs_kvzalloc(sbi, bitmap_size, GFP_KERNEL);
4691 if (!dirty_i->victim_secmap)
4696 static int build_dirty_segmap(struct f2fs_sb_info *sbi)
4698 struct dirty_seglist_info *dirty_i;
4699 unsigned int bitmap_size, i;
4701 /* allocate memory for dirty segments list information */
4702 dirty_i = f2fs_kzalloc(sbi, sizeof(struct dirty_seglist_info),
4707 SM_I(sbi)->dirty_info = dirty_i;
4708 mutex_init(&dirty_i->seglist_lock);
4710 bitmap_size = f2fs_bitmap_size(MAIN_SEGS(sbi));
4712 for (i = 0; i < NR_DIRTY_TYPE; i++) {
4713 dirty_i->dirty_segmap[i] = f2fs_kvzalloc(sbi, bitmap_size,
4715 if (!dirty_i->dirty_segmap[i])
4719 if (__is_large_section(sbi)) {
4720 bitmap_size = f2fs_bitmap_size(MAIN_SECS(sbi));
4721 dirty_i->dirty_secmap = f2fs_kvzalloc(sbi,
4722 bitmap_size, GFP_KERNEL);
4723 if (!dirty_i->dirty_secmap)
4727 init_dirty_segmap(sbi);
4728 return init_victim_secmap(sbi);
4731 static int sanity_check_curseg(struct f2fs_sb_info *sbi)
4736 * In LFS/SSR curseg, .next_blkoff should point to an unused blkaddr;
4737 * In LFS curseg, all blkaddr after .next_blkoff should be unused.
4739 for (i = 0; i < NR_PERSISTENT_LOG; i++) {
4740 struct curseg_info *curseg = CURSEG_I(sbi, i);
4741 struct seg_entry *se = get_seg_entry(sbi, curseg->segno);
4742 unsigned int blkofs = curseg->next_blkoff;
4744 if (f2fs_sb_has_readonly(sbi) &&
4745 i != CURSEG_HOT_DATA && i != CURSEG_HOT_NODE)
4748 sanity_check_seg_type(sbi, curseg->seg_type);
4750 if (f2fs_test_bit(blkofs, se->cur_valid_map))
4753 if (curseg->alloc_type == SSR)
4756 for (blkofs += 1; blkofs < sbi->blocks_per_seg; blkofs++) {
4757 if (!f2fs_test_bit(blkofs, se->cur_valid_map))
4761 "Current segment's next free block offset is inconsistent with bitmap, logtype:%u, segno:%u, type:%u, next_blkoff:%u, blkofs:%u",
4762 i, curseg->segno, curseg->alloc_type,
4763 curseg->next_blkoff, blkofs);
4764 return -EFSCORRUPTED;
4770 #ifdef CONFIG_BLK_DEV_ZONED
4772 static int check_zone_write_pointer(struct f2fs_sb_info *sbi,
4773 struct f2fs_dev_info *fdev,
4774 struct blk_zone *zone)
4776 unsigned int wp_segno, wp_blkoff, zone_secno, zone_segno, segno;
4777 block_t zone_block, wp_block, last_valid_block;
4778 unsigned int log_sectors_per_block = sbi->log_blocksize - SECTOR_SHIFT;
4780 struct seg_entry *se;
4782 if (zone->type != BLK_ZONE_TYPE_SEQWRITE_REQ)
4785 wp_block = fdev->start_blk + (zone->wp >> log_sectors_per_block);
4786 wp_segno = GET_SEGNO(sbi, wp_block);
4787 wp_blkoff = wp_block - START_BLOCK(sbi, wp_segno);
4788 zone_block = fdev->start_blk + (zone->start >> log_sectors_per_block);
4789 zone_segno = GET_SEGNO(sbi, zone_block);
4790 zone_secno = GET_SEC_FROM_SEG(sbi, zone_segno);
4792 if (zone_segno >= MAIN_SEGS(sbi))
4796 * Skip check of zones cursegs point to, since
4797 * fix_curseg_write_pointer() checks them.
4799 for (i = 0; i < NO_CHECK_TYPE; i++)
4800 if (zone_secno == GET_SEC_FROM_SEG(sbi,
4801 CURSEG_I(sbi, i)->segno))
4805 * Get last valid block of the zone.
4807 last_valid_block = zone_block - 1;
4808 for (s = sbi->segs_per_sec - 1; s >= 0; s--) {
4809 segno = zone_segno + s;
4810 se = get_seg_entry(sbi, segno);
4811 for (b = sbi->blocks_per_seg - 1; b >= 0; b--)
4812 if (f2fs_test_bit(b, se->cur_valid_map)) {
4813 last_valid_block = START_BLOCK(sbi, segno) + b;
4816 if (last_valid_block >= zone_block)
4821 * If last valid block is beyond the write pointer, report the
4822 * inconsistency. This inconsistency does not cause write error
4823 * because the zone will not be selected for write operation until
4824 * it get discarded. Just report it.
4826 if (last_valid_block >= wp_block) {
4827 f2fs_notice(sbi, "Valid block beyond write pointer: "
4828 "valid block[0x%x,0x%x] wp[0x%x,0x%x]",
4829 GET_SEGNO(sbi, last_valid_block),
4830 GET_BLKOFF_FROM_SEG0(sbi, last_valid_block),
4831 wp_segno, wp_blkoff);
4836 * If there is no valid block in the zone and if write pointer is
4837 * not at zone start, reset the write pointer.
4839 if (last_valid_block + 1 == zone_block && zone->wp != zone->start) {
4841 "Zone without valid block has non-zero write "
4842 "pointer. Reset the write pointer: wp[0x%x,0x%x]",
4843 wp_segno, wp_blkoff);
4844 ret = __f2fs_issue_discard_zone(sbi, fdev->bdev, zone_block,
4845 zone->len >> log_sectors_per_block);
4847 f2fs_err(sbi, "Discard zone failed: %s (errno=%d)",
4856 static struct f2fs_dev_info *get_target_zoned_dev(struct f2fs_sb_info *sbi,
4857 block_t zone_blkaddr)
4861 for (i = 0; i < sbi->s_ndevs; i++) {
4862 if (!bdev_is_zoned(FDEV(i).bdev))
4864 if (sbi->s_ndevs == 1 || (FDEV(i).start_blk <= zone_blkaddr &&
4865 zone_blkaddr <= FDEV(i).end_blk))
4872 static int report_one_zone_cb(struct blk_zone *zone, unsigned int idx,
4875 memcpy(data, zone, sizeof(struct blk_zone));
4879 static int fix_curseg_write_pointer(struct f2fs_sb_info *sbi, int type)
4881 struct curseg_info *cs = CURSEG_I(sbi, type);
4882 struct f2fs_dev_info *zbd;
4883 struct blk_zone zone;
4884 unsigned int cs_section, wp_segno, wp_blkoff, wp_sector_off;
4885 block_t cs_zone_block, wp_block;
4886 unsigned int log_sectors_per_block = sbi->log_blocksize - SECTOR_SHIFT;
4887 sector_t zone_sector;
4890 cs_section = GET_SEC_FROM_SEG(sbi, cs->segno);
4891 cs_zone_block = START_BLOCK(sbi, GET_SEG_FROM_SEC(sbi, cs_section));
4893 zbd = get_target_zoned_dev(sbi, cs_zone_block);
4897 /* report zone for the sector the curseg points to */
4898 zone_sector = (sector_t)(cs_zone_block - zbd->start_blk)
4899 << log_sectors_per_block;
4900 err = blkdev_report_zones(zbd->bdev, zone_sector, 1,
4901 report_one_zone_cb, &zone);
4903 f2fs_err(sbi, "Report zone failed: %s errno=(%d)",
4908 if (zone.type != BLK_ZONE_TYPE_SEQWRITE_REQ)
4911 wp_block = zbd->start_blk + (zone.wp >> log_sectors_per_block);
4912 wp_segno = GET_SEGNO(sbi, wp_block);
4913 wp_blkoff = wp_block - START_BLOCK(sbi, wp_segno);
4914 wp_sector_off = zone.wp & GENMASK(log_sectors_per_block - 1, 0);
4916 if (cs->segno == wp_segno && cs->next_blkoff == wp_blkoff &&
4920 f2fs_notice(sbi, "Unaligned curseg[%d] with write pointer: "
4921 "curseg[0x%x,0x%x] wp[0x%x,0x%x]",
4922 type, cs->segno, cs->next_blkoff, wp_segno, wp_blkoff);
4924 f2fs_notice(sbi, "Assign new section to curseg[%d]: "
4925 "curseg[0x%x,0x%x]", type, cs->segno, cs->next_blkoff);
4927 f2fs_allocate_new_section(sbi, type, true);
4929 /* check consistency of the zone curseg pointed to */
4930 if (check_zone_write_pointer(sbi, zbd, &zone))
4933 /* check newly assigned zone */
4934 cs_section = GET_SEC_FROM_SEG(sbi, cs->segno);
4935 cs_zone_block = START_BLOCK(sbi, GET_SEG_FROM_SEC(sbi, cs_section));
4937 zbd = get_target_zoned_dev(sbi, cs_zone_block);
4941 zone_sector = (sector_t)(cs_zone_block - zbd->start_blk)
4942 << log_sectors_per_block;
4943 err = blkdev_report_zones(zbd->bdev, zone_sector, 1,
4944 report_one_zone_cb, &zone);
4946 f2fs_err(sbi, "Report zone failed: %s errno=(%d)",
4951 if (zone.type != BLK_ZONE_TYPE_SEQWRITE_REQ)
4954 if (zone.wp != zone.start) {
4956 "New zone for curseg[%d] is not yet discarded. "
4957 "Reset the zone: curseg[0x%x,0x%x]",
4958 type, cs->segno, cs->next_blkoff);
4959 err = __f2fs_issue_discard_zone(sbi, zbd->bdev,
4960 zone_sector >> log_sectors_per_block,
4961 zone.len >> log_sectors_per_block);
4963 f2fs_err(sbi, "Discard zone failed: %s (errno=%d)",
4972 int f2fs_fix_curseg_write_pointer(struct f2fs_sb_info *sbi)
4976 for (i = 0; i < NR_PERSISTENT_LOG; i++) {
4977 ret = fix_curseg_write_pointer(sbi, i);
4985 struct check_zone_write_pointer_args {
4986 struct f2fs_sb_info *sbi;
4987 struct f2fs_dev_info *fdev;
4990 static int check_zone_write_pointer_cb(struct blk_zone *zone, unsigned int idx,
4993 struct check_zone_write_pointer_args *args;
4995 args = (struct check_zone_write_pointer_args *)data;
4997 return check_zone_write_pointer(args->sbi, args->fdev, zone);
5000 int f2fs_check_write_pointer(struct f2fs_sb_info *sbi)
5003 struct check_zone_write_pointer_args args;
5005 for (i = 0; i < sbi->s_ndevs; i++) {
5006 if (!bdev_is_zoned(FDEV(i).bdev))
5010 args.fdev = &FDEV(i);
5011 ret = blkdev_report_zones(FDEV(i).bdev, 0, BLK_ALL_ZONES,
5012 check_zone_write_pointer_cb, &args);
5020 static bool is_conv_zone(struct f2fs_sb_info *sbi, unsigned int zone_idx,
5021 unsigned int dev_idx)
5023 if (!bdev_is_zoned(FDEV(dev_idx).bdev))
5025 return !test_bit(zone_idx, FDEV(dev_idx).blkz_seq);
5028 /* Return the zone index in the given device */
5029 static unsigned int get_zone_idx(struct f2fs_sb_info *sbi, unsigned int secno,
5032 block_t sec_start_blkaddr = START_BLOCK(sbi, GET_SEG_FROM_SEC(sbi, secno));
5034 return (sec_start_blkaddr - FDEV(dev_idx).start_blk) >>
5035 sbi->log_blocks_per_blkz;
5039 * Return the usable segments in a section based on the zone's
5040 * corresponding zone capacity. Zone is equal to a section.
5042 static inline unsigned int f2fs_usable_zone_segs_in_sec(
5043 struct f2fs_sb_info *sbi, unsigned int segno)
5045 unsigned int dev_idx, zone_idx, unusable_segs_in_sec;
5047 dev_idx = f2fs_target_device_index(sbi, START_BLOCK(sbi, segno));
5048 zone_idx = get_zone_idx(sbi, GET_SEC_FROM_SEG(sbi, segno), dev_idx);
5050 /* Conventional zone's capacity is always equal to zone size */
5051 if (is_conv_zone(sbi, zone_idx, dev_idx))
5052 return sbi->segs_per_sec;
5055 * If the zone_capacity_blocks array is NULL, then zone capacity
5056 * is equal to the zone size for all zones
5058 if (!FDEV(dev_idx).zone_capacity_blocks)
5059 return sbi->segs_per_sec;
5061 /* Get the segment count beyond zone capacity block */
5062 unusable_segs_in_sec = (sbi->blocks_per_blkz -
5063 FDEV(dev_idx).zone_capacity_blocks[zone_idx]) >>
5064 sbi->log_blocks_per_seg;
5065 return sbi->segs_per_sec - unusable_segs_in_sec;
5069 * Return the number of usable blocks in a segment. The number of blocks
5070 * returned is always equal to the number of blocks in a segment for
5071 * segments fully contained within a sequential zone capacity or a
5072 * conventional zone. For segments partially contained in a sequential
5073 * zone capacity, the number of usable blocks up to the zone capacity
5074 * is returned. 0 is returned in all other cases.
5076 static inline unsigned int f2fs_usable_zone_blks_in_seg(
5077 struct f2fs_sb_info *sbi, unsigned int segno)
5079 block_t seg_start, sec_start_blkaddr, sec_cap_blkaddr;
5080 unsigned int zone_idx, dev_idx, secno;
5082 secno = GET_SEC_FROM_SEG(sbi, segno);
5083 seg_start = START_BLOCK(sbi, segno);
5084 dev_idx = f2fs_target_device_index(sbi, seg_start);
5085 zone_idx = get_zone_idx(sbi, secno, dev_idx);
5088 * Conventional zone's capacity is always equal to zone size,
5089 * so, blocks per segment is unchanged.
5091 if (is_conv_zone(sbi, zone_idx, dev_idx))
5092 return sbi->blocks_per_seg;
5094 if (!FDEV(dev_idx).zone_capacity_blocks)
5095 return sbi->blocks_per_seg;
5097 sec_start_blkaddr = START_BLOCK(sbi, GET_SEG_FROM_SEC(sbi, secno));
5098 sec_cap_blkaddr = sec_start_blkaddr +
5099 FDEV(dev_idx).zone_capacity_blocks[zone_idx];
5102 * If segment starts before zone capacity and spans beyond
5103 * zone capacity, then usable blocks are from seg start to
5104 * zone capacity. If the segment starts after the zone capacity,
5105 * then there are no usable blocks.
5107 if (seg_start >= sec_cap_blkaddr)
5109 if (seg_start + sbi->blocks_per_seg > sec_cap_blkaddr)
5110 return sec_cap_blkaddr - seg_start;
5112 return sbi->blocks_per_seg;
5115 int f2fs_fix_curseg_write_pointer(struct f2fs_sb_info *sbi)
5120 int f2fs_check_write_pointer(struct f2fs_sb_info *sbi)
5125 static inline unsigned int f2fs_usable_zone_blks_in_seg(struct f2fs_sb_info *sbi,
5131 static inline unsigned int f2fs_usable_zone_segs_in_sec(struct f2fs_sb_info *sbi,
5137 unsigned int f2fs_usable_blks_in_seg(struct f2fs_sb_info *sbi,
5140 if (f2fs_sb_has_blkzoned(sbi))
5141 return f2fs_usable_zone_blks_in_seg(sbi, segno);
5143 return sbi->blocks_per_seg;
5146 unsigned int f2fs_usable_segs_in_sec(struct f2fs_sb_info *sbi,
5149 if (f2fs_sb_has_blkzoned(sbi))
5150 return f2fs_usable_zone_segs_in_sec(sbi, segno);
5152 return sbi->segs_per_sec;
5156 * Update min, max modified time for cost-benefit GC algorithm
5158 static void init_min_max_mtime(struct f2fs_sb_info *sbi)
5160 struct sit_info *sit_i = SIT_I(sbi);
5163 down_write(&sit_i->sentry_lock);
5165 sit_i->min_mtime = ULLONG_MAX;
5167 for (segno = 0; segno < MAIN_SEGS(sbi); segno += sbi->segs_per_sec) {
5169 unsigned long long mtime = 0;
5171 for (i = 0; i < sbi->segs_per_sec; i++)
5172 mtime += get_seg_entry(sbi, segno + i)->mtime;
5174 mtime = div_u64(mtime, sbi->segs_per_sec);
5176 if (sit_i->min_mtime > mtime)
5177 sit_i->min_mtime = mtime;
5179 sit_i->max_mtime = get_mtime(sbi, false);
5180 sit_i->dirty_max_mtime = 0;
5181 up_write(&sit_i->sentry_lock);
5184 int f2fs_build_segment_manager(struct f2fs_sb_info *sbi)
5186 struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
5187 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
5188 struct f2fs_sm_info *sm_info;
5191 sm_info = f2fs_kzalloc(sbi, sizeof(struct f2fs_sm_info), GFP_KERNEL);
5196 sbi->sm_info = sm_info;
5197 sm_info->seg0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr);
5198 sm_info->main_blkaddr = le32_to_cpu(raw_super->main_blkaddr);
5199 sm_info->segment_count = le32_to_cpu(raw_super->segment_count);
5200 sm_info->reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
5201 sm_info->ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
5202 sm_info->main_segments = le32_to_cpu(raw_super->segment_count_main);
5203 sm_info->ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
5204 sm_info->rec_prefree_segments = sm_info->main_segments *
5205 DEF_RECLAIM_PREFREE_SEGMENTS / 100;
5206 if (sm_info->rec_prefree_segments > DEF_MAX_RECLAIM_PREFREE_SEGMENTS)
5207 sm_info->rec_prefree_segments = DEF_MAX_RECLAIM_PREFREE_SEGMENTS;
5209 if (!f2fs_lfs_mode(sbi))
5210 sm_info->ipu_policy = 1 << F2FS_IPU_FSYNC;
5211 sm_info->min_ipu_util = DEF_MIN_IPU_UTIL;
5212 sm_info->min_fsync_blocks = DEF_MIN_FSYNC_BLOCKS;
5213 sm_info->min_seq_blocks = sbi->blocks_per_seg;
5214 sm_info->min_hot_blocks = DEF_MIN_HOT_BLOCKS;
5215 sm_info->min_ssr_sections = reserved_sections(sbi);
5217 INIT_LIST_HEAD(&sm_info->sit_entry_set);
5219 init_rwsem(&sm_info->curseg_lock);
5221 if (!f2fs_readonly(sbi->sb)) {
5222 err = f2fs_create_flush_cmd_control(sbi);
5227 err = create_discard_cmd_control(sbi);
5231 err = build_sit_info(sbi);
5234 err = build_free_segmap(sbi);
5237 err = build_curseg(sbi);
5241 /* reinit free segmap based on SIT */
5242 err = build_sit_entries(sbi);
5246 init_free_segmap(sbi);
5247 err = build_dirty_segmap(sbi);
5251 err = sanity_check_curseg(sbi);
5255 init_min_max_mtime(sbi);
5259 static void discard_dirty_segmap(struct f2fs_sb_info *sbi,
5260 enum dirty_type dirty_type)
5262 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
5264 mutex_lock(&dirty_i->seglist_lock);
5265 kvfree(dirty_i->dirty_segmap[dirty_type]);
5266 dirty_i->nr_dirty[dirty_type] = 0;
5267 mutex_unlock(&dirty_i->seglist_lock);
5270 static void destroy_victim_secmap(struct f2fs_sb_info *sbi)
5272 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
5274 kvfree(dirty_i->victim_secmap);
5277 static void destroy_dirty_segmap(struct f2fs_sb_info *sbi)
5279 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
5285 /* discard pre-free/dirty segments list */
5286 for (i = 0; i < NR_DIRTY_TYPE; i++)
5287 discard_dirty_segmap(sbi, i);
5289 if (__is_large_section(sbi)) {
5290 mutex_lock(&dirty_i->seglist_lock);
5291 kvfree(dirty_i->dirty_secmap);
5292 mutex_unlock(&dirty_i->seglist_lock);
5295 destroy_victim_secmap(sbi);
5296 SM_I(sbi)->dirty_info = NULL;
5300 static void destroy_curseg(struct f2fs_sb_info *sbi)
5302 struct curseg_info *array = SM_I(sbi)->curseg_array;
5307 SM_I(sbi)->curseg_array = NULL;
5308 for (i = 0; i < NR_CURSEG_TYPE; i++) {
5309 kfree(array[i].sum_blk);
5310 kfree(array[i].journal);
5315 static void destroy_free_segmap(struct f2fs_sb_info *sbi)
5317 struct free_segmap_info *free_i = SM_I(sbi)->free_info;
5321 SM_I(sbi)->free_info = NULL;
5322 kvfree(free_i->free_segmap);
5323 kvfree(free_i->free_secmap);
5327 static void destroy_sit_info(struct f2fs_sb_info *sbi)
5329 struct sit_info *sit_i = SIT_I(sbi);
5334 if (sit_i->sentries)
5335 kvfree(sit_i->bitmap);
5336 kfree(sit_i->tmp_map);
5338 kvfree(sit_i->sentries);
5339 kvfree(sit_i->sec_entries);
5340 kvfree(sit_i->dirty_sentries_bitmap);
5342 SM_I(sbi)->sit_info = NULL;
5343 kvfree(sit_i->sit_bitmap);
5344 #ifdef CONFIG_F2FS_CHECK_FS
5345 kvfree(sit_i->sit_bitmap_mir);
5346 kvfree(sit_i->invalid_segmap);
5351 void f2fs_destroy_segment_manager(struct f2fs_sb_info *sbi)
5353 struct f2fs_sm_info *sm_info = SM_I(sbi);
5357 f2fs_destroy_flush_cmd_control(sbi, true);
5358 destroy_discard_cmd_control(sbi);
5359 destroy_dirty_segmap(sbi);
5360 destroy_curseg(sbi);
5361 destroy_free_segmap(sbi);
5362 destroy_sit_info(sbi);
5363 sbi->sm_info = NULL;
5367 int __init f2fs_create_segment_manager_caches(void)
5369 discard_entry_slab = f2fs_kmem_cache_create("f2fs_discard_entry",
5370 sizeof(struct discard_entry));
5371 if (!discard_entry_slab)
5374 discard_cmd_slab = f2fs_kmem_cache_create("f2fs_discard_cmd",
5375 sizeof(struct discard_cmd));
5376 if (!discard_cmd_slab)
5377 goto destroy_discard_entry;
5379 sit_entry_set_slab = f2fs_kmem_cache_create("f2fs_sit_entry_set",
5380 sizeof(struct sit_entry_set));
5381 if (!sit_entry_set_slab)
5382 goto destroy_discard_cmd;
5384 inmem_entry_slab = f2fs_kmem_cache_create("f2fs_inmem_page_entry",
5385 sizeof(struct inmem_pages));
5386 if (!inmem_entry_slab)
5387 goto destroy_sit_entry_set;
5390 destroy_sit_entry_set:
5391 kmem_cache_destroy(sit_entry_set_slab);
5392 destroy_discard_cmd:
5393 kmem_cache_destroy(discard_cmd_slab);
5394 destroy_discard_entry:
5395 kmem_cache_destroy(discard_entry_slab);
5400 void f2fs_destroy_segment_manager_caches(void)
5402 kmem_cache_destroy(sit_entry_set_slab);
5403 kmem_cache_destroy(discard_cmd_slab);
5404 kmem_cache_destroy(discard_entry_slab);
5405 kmem_cache_destroy(inmem_entry_slab);