diff options
Diffstat (limited to 'fs/f2fs/segment.c')
| -rw-r--r-- | fs/f2fs/segment.c | 5683 |
1 files changed, 4928 insertions, 755 deletions
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c index a86d125a9885..c26424f47686 100644 --- a/fs/f2fs/segment.c +++ b/fs/f2fs/segment.c @@ -1,39 +1,770 @@ +// SPDX-License-Identifier: GPL-2.0 /* * fs/f2fs/segment.c * * Copyright (c) 2012 Samsung Electronics Co., Ltd. * http://www.samsung.com/ - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. */ #include <linux/fs.h> #include <linux/f2fs_fs.h> #include <linux/bio.h> #include <linux/blkdev.h> +#include <linux/sched/mm.h> #include <linux/prefetch.h> -#include <linux/vmalloc.h> +#include <linux/kthread.h> +#include <linux/swap.h> +#include <linux/timer.h> +#include <linux/freezer.h> +#include <linux/sched/signal.h> +#include <linux/random.h> #include "f2fs.h" #include "segment.h" #include "node.h" +#include "gc.h" +#include "iostat.h" #include <trace/events/f2fs.h> +#define __reverse_ffz(x) __reverse_ffs(~(x)) + +static struct kmem_cache *discard_entry_slab; +static struct kmem_cache *discard_cmd_slab; +static struct kmem_cache *sit_entry_set_slab; +static struct kmem_cache *revoke_entry_slab; + +static unsigned long __reverse_ulong(unsigned char *str) +{ + unsigned long tmp = 0; + int shift = 24, idx = 0; + +#if BITS_PER_LONG == 64 + shift = 56; +#endif + while (shift >= 0) { + tmp |= (unsigned long)str[idx++] << shift; + shift -= BITS_PER_BYTE; + } + return tmp; +} + +/* + * __reverse_ffs is copied from include/asm-generic/bitops/__ffs.h since + * MSB and LSB are reversed in a byte by f2fs_set_bit. + */ +static inline unsigned long __reverse_ffs(unsigned long word) +{ + int num = 0; + +#if BITS_PER_LONG == 64 + if ((word & 0xffffffff00000000UL) == 0) + num += 32; + else + word >>= 32; +#endif + if ((word & 0xffff0000) == 0) + num += 16; + else + word >>= 16; + + if ((word & 0xff00) == 0) + num += 8; + else + word >>= 8; + + if ((word & 0xf0) == 0) + num += 4; + else + word >>= 4; + + if ((word & 0xc) == 0) + num += 2; + else + word >>= 2; + + if ((word & 0x2) == 0) + num += 1; + return num; +} + +/* + * __find_rev_next(_zero)_bit is copied from lib/find_next_bit.c because + * f2fs_set_bit makes MSB and LSB reversed in a byte. + * @size must be integral times of unsigned long. + * Example: + * MSB <--> LSB + * f2fs_set_bit(0, bitmap) => 1000 0000 + * f2fs_set_bit(7, bitmap) => 0000 0001 + */ +static unsigned long __find_rev_next_bit(const unsigned long *addr, + unsigned long size, unsigned long offset) +{ + const unsigned long *p = addr + BIT_WORD(offset); + unsigned long result = size; + unsigned long tmp; + + if (offset >= size) + return size; + + size -= (offset & ~(BITS_PER_LONG - 1)); + offset %= BITS_PER_LONG; + + while (1) { + if (*p == 0) + goto pass; + + tmp = __reverse_ulong((unsigned char *)p); + + tmp &= ~0UL >> offset; + if (size < BITS_PER_LONG) + tmp &= (~0UL << (BITS_PER_LONG - size)); + if (tmp) + goto found; +pass: + if (size <= BITS_PER_LONG) + break; + size -= BITS_PER_LONG; + offset = 0; + p++; + } + return result; +found: + return result - size + __reverse_ffs(tmp); +} + +static unsigned long __find_rev_next_zero_bit(const unsigned long *addr, + unsigned long size, unsigned long offset) +{ + const unsigned long *p = addr + BIT_WORD(offset); + unsigned long result = size; + unsigned long tmp; + + if (offset >= size) + return size; + + size -= (offset & ~(BITS_PER_LONG - 1)); + offset %= BITS_PER_LONG; + + while (1) { + if (*p == ~0UL) + goto pass; + + tmp = __reverse_ulong((unsigned char *)p); + + if (offset) + tmp |= ~0UL << (BITS_PER_LONG - offset); + if (size < BITS_PER_LONG) + tmp |= ~0UL >> size; + if (tmp != ~0UL) + goto found; +pass: + if (size <= BITS_PER_LONG) + break; + size -= BITS_PER_LONG; + offset = 0; + p++; + } + return result; +found: + return result - size + __reverse_ffz(tmp); +} + +bool f2fs_need_SSR(struct f2fs_sb_info *sbi) +{ + int node_secs = get_blocktype_secs(sbi, F2FS_DIRTY_NODES); + int dent_secs = get_blocktype_secs(sbi, F2FS_DIRTY_DENTS); + int imeta_secs = get_blocktype_secs(sbi, F2FS_DIRTY_IMETA); + + if (f2fs_lfs_mode(sbi)) + return false; + if (sbi->gc_mode == GC_URGENT_HIGH) + return true; + if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) + return true; + + return free_sections(sbi) <= (node_secs + 2 * dent_secs + imeta_secs + + SM_I(sbi)->min_ssr_sections + reserved_sections(sbi)); +} + +void f2fs_abort_atomic_write(struct inode *inode, bool clean) +{ + struct f2fs_inode_info *fi = F2FS_I(inode); + + if (!f2fs_is_atomic_file(inode)) + return; + + if (clean) + truncate_inode_pages_final(inode->i_mapping); + + release_atomic_write_cnt(inode); + clear_inode_flag(inode, FI_ATOMIC_COMMITTED); + clear_inode_flag(inode, FI_ATOMIC_REPLACE); + clear_inode_flag(inode, FI_ATOMIC_FILE); + if (is_inode_flag_set(inode, FI_ATOMIC_DIRTIED)) { + clear_inode_flag(inode, FI_ATOMIC_DIRTIED); + /* + * The vfs inode keeps clean during commit, but the f2fs inode + * doesn't. So clear the dirty state after commit and let + * f2fs_mark_inode_dirty_sync ensure a consistent dirty state. + */ + f2fs_inode_synced(inode); + f2fs_mark_inode_dirty_sync(inode, true); + } + stat_dec_atomic_inode(inode); + + F2FS_I(inode)->atomic_write_task = NULL; + + if (clean) { + f2fs_i_size_write(inode, fi->original_i_size); + fi->original_i_size = 0; + } + /* avoid stale dirty inode during eviction */ + sync_inode_metadata(inode, 0); +} + +static int __replace_atomic_write_block(struct inode *inode, pgoff_t index, + block_t new_addr, block_t *old_addr, bool recover) +{ + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); + struct dnode_of_data dn; + struct node_info ni; + int err; + +retry: + set_new_dnode(&dn, inode, NULL, NULL, 0); + err = f2fs_get_dnode_of_data(&dn, index, ALLOC_NODE); + if (err) { + if (err == -ENOMEM) { + memalloc_retry_wait(GFP_NOFS); + goto retry; + } + return err; + } + + err = f2fs_get_node_info(sbi, dn.nid, &ni, false); + if (err) { + f2fs_put_dnode(&dn); + return err; + } + + if (recover) { + /* dn.data_blkaddr is always valid */ + if (!__is_valid_data_blkaddr(new_addr)) { + if (new_addr == NULL_ADDR) + dec_valid_block_count(sbi, inode, 1); + f2fs_invalidate_blocks(sbi, dn.data_blkaddr, 1); + f2fs_update_data_blkaddr(&dn, new_addr); + } else { + f2fs_replace_block(sbi, &dn, dn.data_blkaddr, + new_addr, ni.version, true, true); + } + } else { + blkcnt_t count = 1; + + err = inc_valid_block_count(sbi, inode, &count, true); + if (err) { + f2fs_put_dnode(&dn); + return err; + } + + *old_addr = dn.data_blkaddr; + f2fs_truncate_data_blocks_range(&dn, 1); + dec_valid_block_count(sbi, F2FS_I(inode)->cow_inode, count); + + f2fs_replace_block(sbi, &dn, dn.data_blkaddr, new_addr, + ni.version, true, false); + } + + f2fs_put_dnode(&dn); + + trace_f2fs_replace_atomic_write_block(inode, F2FS_I(inode)->cow_inode, + index, old_addr ? *old_addr : 0, new_addr, recover); + return 0; +} + +static void __complete_revoke_list(struct inode *inode, struct list_head *head, + bool revoke) +{ + struct revoke_entry *cur, *tmp; + pgoff_t start_index = 0; + bool truncate = is_inode_flag_set(inode, FI_ATOMIC_REPLACE); + + list_for_each_entry_safe(cur, tmp, head, list) { + if (revoke) { + __replace_atomic_write_block(inode, cur->index, + cur->old_addr, NULL, true); + } else if (truncate) { + f2fs_truncate_hole(inode, start_index, cur->index); + start_index = cur->index + 1; + } + + list_del(&cur->list); + kmem_cache_free(revoke_entry_slab, cur); + } + + if (!revoke && truncate) + f2fs_do_truncate_blocks(inode, start_index * PAGE_SIZE, false); +} + +static int __f2fs_commit_atomic_write(struct inode *inode) +{ + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); + struct f2fs_inode_info *fi = F2FS_I(inode); + struct inode *cow_inode = fi->cow_inode; + struct revoke_entry *new; + struct list_head revoke_list; + block_t blkaddr; + struct dnode_of_data dn; + pgoff_t len = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE); + pgoff_t off = 0, blen, index; + int ret = 0, i; + + INIT_LIST_HEAD(&revoke_list); + + while (len) { + blen = min_t(pgoff_t, ADDRS_PER_BLOCK(cow_inode), len); + + set_new_dnode(&dn, cow_inode, NULL, NULL, 0); + ret = f2fs_get_dnode_of_data(&dn, off, LOOKUP_NODE_RA); + if (ret && ret != -ENOENT) { + goto out; + } else if (ret == -ENOENT) { + ret = 0; + if (dn.max_level == 0) + goto out; + goto next; + } + + blen = min((pgoff_t)ADDRS_PER_PAGE(dn.node_folio, cow_inode), + len); + index = off; + for (i = 0; i < blen; i++, dn.ofs_in_node++, index++) { + blkaddr = f2fs_data_blkaddr(&dn); + + if (!__is_valid_data_blkaddr(blkaddr)) { + continue; + } else if (!f2fs_is_valid_blkaddr(sbi, blkaddr, + DATA_GENERIC_ENHANCE)) { + f2fs_put_dnode(&dn); + ret = -EFSCORRUPTED; + goto out; + } + + new = f2fs_kmem_cache_alloc(revoke_entry_slab, GFP_NOFS, + true, NULL); + + ret = __replace_atomic_write_block(inode, index, blkaddr, + &new->old_addr, false); + if (ret) { + f2fs_put_dnode(&dn); + kmem_cache_free(revoke_entry_slab, new); + goto out; + } + + f2fs_update_data_blkaddr(&dn, NULL_ADDR); + new->index = index; + list_add_tail(&new->list, &revoke_list); + } + f2fs_put_dnode(&dn); +next: + off += blen; + len -= blen; + } + +out: + if (time_to_inject(sbi, FAULT_TIMEOUT)) + f2fs_io_schedule_timeout_killable(DEFAULT_FAULT_TIMEOUT); + + if (ret) { + sbi->revoked_atomic_block += fi->atomic_write_cnt; + } else { + sbi->committed_atomic_block += fi->atomic_write_cnt; + set_inode_flag(inode, FI_ATOMIC_COMMITTED); + + /* + * inode may has no FI_ATOMIC_DIRTIED flag due to no write + * before commit. + */ + if (is_inode_flag_set(inode, FI_ATOMIC_DIRTIED)) { + /* clear atomic dirty status and set vfs dirty status */ + clear_inode_flag(inode, FI_ATOMIC_DIRTIED); + f2fs_mark_inode_dirty_sync(inode, true); + } + } + + __complete_revoke_list(inode, &revoke_list, ret ? true : false); + + return ret; +} + +int f2fs_commit_atomic_write(struct inode *inode) +{ + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); + struct f2fs_inode_info *fi = F2FS_I(inode); + int err; + + err = filemap_write_and_wait_range(inode->i_mapping, 0, LLONG_MAX); + if (err) + return err; + + f2fs_down_write(&fi->i_gc_rwsem[WRITE]); + f2fs_lock_op(sbi); + + err = __f2fs_commit_atomic_write(inode); + + f2fs_unlock_op(sbi); + f2fs_up_write(&fi->i_gc_rwsem[WRITE]); + + return err; +} + /* * This function balances dirty node and dentry pages. * In addition, it controls garbage collection. */ -void f2fs_balance_fs(struct f2fs_sb_info *sbi) +void f2fs_balance_fs(struct f2fs_sb_info *sbi, bool need) { + if (f2fs_cp_error(sbi)) + return; + + if (time_to_inject(sbi, FAULT_CHECKPOINT)) + f2fs_stop_checkpoint(sbi, false, STOP_CP_REASON_FAULT_INJECT); + + /* balance_fs_bg is able to be pending */ + if (need && excess_cached_nats(sbi)) + f2fs_balance_fs_bg(sbi, false); + + if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) + return; + /* * We should do GC or end up with checkpoint, if there are so many dirty * dir/node pages without enough free segments. */ - if (has_not_enough_free_secs(sbi, 0)) { - mutex_lock(&sbi->gc_mutex); - f2fs_gc(sbi); + if (has_enough_free_secs(sbi, 0, 0)) + return; + + if (test_opt(sbi, GC_MERGE) && sbi->gc_thread && + sbi->gc_thread->f2fs_gc_task) { + DEFINE_WAIT(wait); + + prepare_to_wait(&sbi->gc_thread->fggc_wq, &wait, + TASK_UNINTERRUPTIBLE); + wake_up(&sbi->gc_thread->gc_wait_queue_head); + io_schedule(); + finish_wait(&sbi->gc_thread->fggc_wq, &wait); + } else { + struct f2fs_gc_control gc_control = { + .victim_segno = NULL_SEGNO, + .init_gc_type = f2fs_sb_has_blkzoned(sbi) ? + FG_GC : BG_GC, + .no_bg_gc = true, + .should_migrate_blocks = false, + .err_gc_skipped = false, + .nr_free_secs = 1 }; + f2fs_down_write(&sbi->gc_lock); + stat_inc_gc_call_count(sbi, FOREGROUND); + f2fs_gc(sbi, &gc_control); + } +} + +static inline bool excess_dirty_threshold(struct f2fs_sb_info *sbi) +{ + int factor = f2fs_rwsem_is_locked(&sbi->cp_rwsem) ? 3 : 2; + unsigned int dents = get_pages(sbi, F2FS_DIRTY_DENTS); + unsigned int qdata = get_pages(sbi, F2FS_DIRTY_QDATA); + unsigned int nodes = get_pages(sbi, F2FS_DIRTY_NODES); + unsigned int meta = get_pages(sbi, F2FS_DIRTY_META); + unsigned int imeta = get_pages(sbi, F2FS_DIRTY_IMETA); + unsigned int threshold = + SEGS_TO_BLKS(sbi, (factor * DEFAULT_DIRTY_THRESHOLD)); + unsigned int global_threshold = threshold * 3 / 2; + + if (dents >= threshold || qdata >= threshold || + nodes >= threshold || meta >= threshold || + imeta >= threshold) + return true; + return dents + qdata + nodes + meta + imeta > global_threshold; +} + +void f2fs_balance_fs_bg(struct f2fs_sb_info *sbi, bool from_bg) +{ + if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) + return; + + /* try to shrink extent cache when there is no enough memory */ + if (!f2fs_available_free_memory(sbi, READ_EXTENT_CACHE)) + f2fs_shrink_read_extent_tree(sbi, + READ_EXTENT_CACHE_SHRINK_NUMBER); + + /* try to shrink age extent cache when there is no enough memory */ + if (!f2fs_available_free_memory(sbi, AGE_EXTENT_CACHE)) + f2fs_shrink_age_extent_tree(sbi, + AGE_EXTENT_CACHE_SHRINK_NUMBER); + + /* check the # of cached NAT entries */ + if (!f2fs_available_free_memory(sbi, NAT_ENTRIES)) + f2fs_try_to_free_nats(sbi, NAT_ENTRY_PER_BLOCK); + + if (!f2fs_available_free_memory(sbi, FREE_NIDS)) + f2fs_try_to_free_nids(sbi, MAX_FREE_NIDS); + else + f2fs_build_free_nids(sbi, false, false); + + if (excess_dirty_nats(sbi) || excess_dirty_threshold(sbi) || + excess_prefree_segs(sbi) || !f2fs_space_for_roll_forward(sbi)) + goto do_sync; + + /* there is background inflight IO or foreground operation recently */ + if (is_inflight_io(sbi, REQ_TIME) || + (!f2fs_time_over(sbi, REQ_TIME) && f2fs_rwsem_is_locked(&sbi->cp_rwsem))) + return; + + /* exceed periodical checkpoint timeout threshold */ + if (f2fs_time_over(sbi, CP_TIME)) + goto do_sync; + + /* checkpoint is the only way to shrink partial cached entries */ + if (f2fs_available_free_memory(sbi, NAT_ENTRIES) && + f2fs_available_free_memory(sbi, INO_ENTRIES)) + return; + +do_sync: + if (test_opt(sbi, DATA_FLUSH) && from_bg) { + struct blk_plug plug; + + mutex_lock(&sbi->flush_lock); + + blk_start_plug(&plug); + f2fs_sync_dirty_inodes(sbi, FILE_INODE, false); + blk_finish_plug(&plug); + + mutex_unlock(&sbi->flush_lock); + } + stat_inc_cp_call_count(sbi, BACKGROUND); + f2fs_sync_fs(sbi->sb, 1); +} + +static int __submit_flush_wait(struct f2fs_sb_info *sbi, + struct block_device *bdev) +{ + int ret = blkdev_issue_flush(bdev); + + trace_f2fs_issue_flush(bdev, test_opt(sbi, NOBARRIER), + test_opt(sbi, FLUSH_MERGE), ret); + if (!ret) + f2fs_update_iostat(sbi, NULL, FS_FLUSH_IO, 0); + return ret; +} + +static int submit_flush_wait(struct f2fs_sb_info *sbi, nid_t ino) +{ + int ret = 0; + int i; + + if (!f2fs_is_multi_device(sbi)) + return __submit_flush_wait(sbi, sbi->sb->s_bdev); + + for (i = 0; i < sbi->s_ndevs; i++) { + if (!f2fs_is_dirty_device(sbi, ino, i, FLUSH_INO)) + continue; + ret = __submit_flush_wait(sbi, FDEV(i).bdev); + if (ret) + break; + } + return ret; +} + +static int issue_flush_thread(void *data) +{ + struct f2fs_sb_info *sbi = data; + struct flush_cmd_control *fcc = SM_I(sbi)->fcc_info; + wait_queue_head_t *q = &fcc->flush_wait_queue; +repeat: + if (kthread_should_stop()) + return 0; + + if (!llist_empty(&fcc->issue_list)) { + struct flush_cmd *cmd, *next; + int ret; + + fcc->dispatch_list = llist_del_all(&fcc->issue_list); + fcc->dispatch_list = llist_reverse_order(fcc->dispatch_list); + + cmd = llist_entry(fcc->dispatch_list, struct flush_cmd, llnode); + + ret = submit_flush_wait(sbi, cmd->ino); + atomic_inc(&fcc->issued_flush); + + llist_for_each_entry_safe(cmd, next, + fcc->dispatch_list, llnode) { + cmd->ret = ret; + complete(&cmd->wait); + } + fcc->dispatch_list = NULL; + } + + wait_event_interruptible(*q, + kthread_should_stop() || !llist_empty(&fcc->issue_list)); + goto repeat; +} + +int f2fs_issue_flush(struct f2fs_sb_info *sbi, nid_t ino) +{ + struct flush_cmd_control *fcc = SM_I(sbi)->fcc_info; + struct flush_cmd cmd; + int ret; + + if (test_opt(sbi, NOBARRIER)) + return 0; + + if (!test_opt(sbi, FLUSH_MERGE)) { + atomic_inc(&fcc->queued_flush); + ret = submit_flush_wait(sbi, ino); + atomic_dec(&fcc->queued_flush); + atomic_inc(&fcc->issued_flush); + return ret; + } + + if (atomic_inc_return(&fcc->queued_flush) == 1 || + f2fs_is_multi_device(sbi)) { + ret = submit_flush_wait(sbi, ino); + atomic_dec(&fcc->queued_flush); + + atomic_inc(&fcc->issued_flush); + return ret; + } + + cmd.ino = ino; + init_completion(&cmd.wait); + + llist_add(&cmd.llnode, &fcc->issue_list); + + /* + * update issue_list before we wake up issue_flush thread, this + * smp_mb() pairs with another barrier in ___wait_event(), see + * more details in comments of waitqueue_active(). + */ + smp_mb(); + + if (waitqueue_active(&fcc->flush_wait_queue)) + wake_up(&fcc->flush_wait_queue); + + if (fcc->f2fs_issue_flush) { + wait_for_completion(&cmd.wait); + atomic_dec(&fcc->queued_flush); + } else { + struct llist_node *list; + + list = llist_del_all(&fcc->issue_list); + if (!list) { + wait_for_completion(&cmd.wait); + atomic_dec(&fcc->queued_flush); + } else { + struct flush_cmd *tmp, *next; + + ret = submit_flush_wait(sbi, ino); + + llist_for_each_entry_safe(tmp, next, list, llnode) { + if (tmp == &cmd) { + cmd.ret = ret; + atomic_dec(&fcc->queued_flush); + continue; + } + tmp->ret = ret; + complete(&tmp->wait); + } + } + } + + return cmd.ret; +} + +int f2fs_create_flush_cmd_control(struct f2fs_sb_info *sbi) +{ + dev_t dev = sbi->sb->s_bdev->bd_dev; + struct flush_cmd_control *fcc; + + if (SM_I(sbi)->fcc_info) { + fcc = SM_I(sbi)->fcc_info; + if (fcc->f2fs_issue_flush) + return 0; + goto init_thread; + } + + fcc = f2fs_kzalloc(sbi, sizeof(struct flush_cmd_control), GFP_KERNEL); + if (!fcc) + return -ENOMEM; + atomic_set(&fcc->issued_flush, 0); + atomic_set(&fcc->queued_flush, 0); + init_waitqueue_head(&fcc->flush_wait_queue); + init_llist_head(&fcc->issue_list); + SM_I(sbi)->fcc_info = fcc; + if (!test_opt(sbi, FLUSH_MERGE)) + return 0; + +init_thread: + fcc->f2fs_issue_flush = kthread_run(issue_flush_thread, sbi, + "f2fs_flush-%u:%u", MAJOR(dev), MINOR(dev)); + if (IS_ERR(fcc->f2fs_issue_flush)) { + int err = PTR_ERR(fcc->f2fs_issue_flush); + + fcc->f2fs_issue_flush = NULL; + return err; } + + return 0; +} + +void f2fs_destroy_flush_cmd_control(struct f2fs_sb_info *sbi, bool free) +{ + struct flush_cmd_control *fcc = SM_I(sbi)->fcc_info; + + if (fcc && fcc->f2fs_issue_flush) { + struct task_struct *flush_thread = fcc->f2fs_issue_flush; + + fcc->f2fs_issue_flush = NULL; + kthread_stop(flush_thread); + } + if (free) { + kfree(fcc); + SM_I(sbi)->fcc_info = NULL; + } +} + +int f2fs_flush_device_cache(struct f2fs_sb_info *sbi) +{ + int ret = 0, i; + + if (!f2fs_is_multi_device(sbi)) + return 0; + + if (test_opt(sbi, NOBARRIER)) + return 0; + + for (i = 1; i < sbi->s_ndevs; i++) { + int count = DEFAULT_RETRY_IO_COUNT; + + if (!f2fs_test_bit(i, (char *)&sbi->dirty_device)) + continue; + + do { + ret = __submit_flush_wait(sbi, FDEV(i).bdev); + if (ret) + f2fs_schedule_timeout(DEFAULT_SCHEDULE_TIMEOUT); + } while (ret && --count); + + if (ret) { + f2fs_stop_checkpoint(sbi, false, + STOP_CP_REASON_FLUSH_FAIL); + break; + } + + spin_lock(&sbi->dev_lock); + f2fs_clear_bit(i, (char *)&sbi->dirty_device); + spin_unlock(&sbi->dev_lock); + } + + return ret; } static void __locate_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno, @@ -42,7 +773,7 @@ static void __locate_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno, struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); /* need not be added */ - if (IS_CURSEG(sbi, segno)) + if (is_curseg(sbi, segno)) return; if (!test_and_set_bit(segno, dirty_i->dirty_segmap[dirty_type])) @@ -50,19 +781,27 @@ static void __locate_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno, if (dirty_type == DIRTY) { struct seg_entry *sentry = get_seg_entry(sbi, segno); - enum dirty_type t = DIRTY_HOT_DATA; + enum dirty_type t = sentry->type; - dirty_type = sentry->type; + if (unlikely(t >= DIRTY)) { + f2fs_bug_on(sbi, 1); + return; + } + if (!test_and_set_bit(segno, dirty_i->dirty_segmap[t])) + dirty_i->nr_dirty[t]++; - if (!test_and_set_bit(segno, dirty_i->dirty_segmap[dirty_type])) - dirty_i->nr_dirty[dirty_type]++; + if (__is_large_section(sbi)) { + unsigned int secno = GET_SEC_FROM_SEG(sbi, segno); + block_t valid_blocks = + get_valid_blocks(sbi, segno, true); - /* Only one bitmap should be set */ - for (; t <= DIRTY_COLD_NODE; t++) { - if (t == dirty_type) - continue; - if (test_and_clear_bit(segno, dirty_i->dirty_segmap[t])) - dirty_i->nr_dirty[t]--; + f2fs_bug_on(sbi, + (!is_sbi_flag_set(sbi, SBI_CP_DISABLED) && + !valid_blocks) || + valid_blocks == CAP_BLKS_PER_SEC(sbi)); + + if (!is_cursec(sbi, secno)) + set_bit(secno, dirty_i->dirty_secmap); } } } @@ -71,21 +810,38 @@ static void __remove_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno, enum dirty_type dirty_type) { struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); + block_t valid_blocks; if (test_and_clear_bit(segno, dirty_i->dirty_segmap[dirty_type])) dirty_i->nr_dirty[dirty_type]--; if (dirty_type == DIRTY) { - enum dirty_type t = DIRTY_HOT_DATA; + struct seg_entry *sentry = get_seg_entry(sbi, segno); + enum dirty_type t = sentry->type; - /* clear all the bitmaps */ - for (; t <= DIRTY_COLD_NODE; t++) - if (test_and_clear_bit(segno, dirty_i->dirty_segmap[t])) - dirty_i->nr_dirty[t]--; + if (test_and_clear_bit(segno, dirty_i->dirty_segmap[t])) + dirty_i->nr_dirty[t]--; - if (get_valid_blocks(sbi, segno, sbi->segs_per_sec) == 0) - clear_bit(GET_SECNO(sbi, segno), + valid_blocks = get_valid_blocks(sbi, segno, true); + if (valid_blocks == 0) { + clear_bit(GET_SEC_FROM_SEG(sbi, segno), dirty_i->victim_secmap); +#ifdef CONFIG_F2FS_CHECK_FS + clear_bit(segno, SIT_I(sbi)->invalid_segmap); +#endif + } + if (__is_large_section(sbi)) { + unsigned int secno = GET_SEC_FROM_SEG(sbi, segno); + + if (!valid_blocks || + valid_blocks == CAP_BLKS_PER_SEC(sbi)) { + clear_bit(secno, dirty_i->dirty_secmap); + return; + } + + if (!is_cursec(sbi, secno)) + set_bit(secno, dirty_i->dirty_secmap); + } } } @@ -97,19 +853,23 @@ static void __remove_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno, static void locate_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno) { struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); - unsigned short valid_blocks; + unsigned short valid_blocks, ckpt_valid_blocks; + unsigned int usable_blocks; - if (segno == NULL_SEGNO || IS_CURSEG(sbi, segno)) + if (segno == NULL_SEGNO || is_curseg(sbi, segno)) return; + usable_blocks = f2fs_usable_blks_in_seg(sbi, segno); mutex_lock(&dirty_i->seglist_lock); - valid_blocks = get_valid_blocks(sbi, segno, 0); + valid_blocks = get_valid_blocks(sbi, segno, false); + ckpt_valid_blocks = get_ckpt_valid_blocks(sbi, segno, false); - if (valid_blocks == 0) { + if (valid_blocks == 0 && (!is_sbi_flag_set(sbi, SBI_CP_DISABLED) || + ckpt_valid_blocks == usable_blocks)) { __locate_dirty_segment(sbi, segno, PRE); __remove_dirty_segment(sbi, segno, DIRTY); - } else if (valid_blocks < sbi->blocks_per_seg) { + } else if (valid_blocks < usable_blocks) { __locate_dirty_segment(sbi, segno, DIRTY); } else { /* Recovery routine with SSR needs this */ @@ -117,73 +877,1689 @@ static void locate_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno) } mutex_unlock(&dirty_i->seglist_lock); - return; } -/* - * Should call clear_prefree_segments after checkpoint is done. - */ -static void set_prefree_as_free_segments(struct f2fs_sb_info *sbi) +/* This moves currently empty dirty blocks to prefree. Must hold seglist_lock */ +void f2fs_dirty_to_prefree(struct f2fs_sb_info *sbi) { struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); - unsigned int segno = -1; - unsigned int total_segs = TOTAL_SEGS(sbi); + unsigned int segno; mutex_lock(&dirty_i->seglist_lock); + for_each_set_bit(segno, dirty_i->dirty_segmap[DIRTY], MAIN_SEGS(sbi)) { + if (get_valid_blocks(sbi, segno, false)) + continue; + if (is_curseg(sbi, segno)) + continue; + __locate_dirty_segment(sbi, segno, PRE); + __remove_dirty_segment(sbi, segno, DIRTY); + } + mutex_unlock(&dirty_i->seglist_lock); +} + +block_t f2fs_get_unusable_blocks(struct f2fs_sb_info *sbi) +{ + int ovp_hole_segs = + (overprovision_segments(sbi) - reserved_segments(sbi)); + block_t ovp_holes = SEGS_TO_BLKS(sbi, ovp_hole_segs); + struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); + block_t holes[2] = {0, 0}; /* DATA and NODE */ + block_t unusable; + struct seg_entry *se; + unsigned int segno; + + mutex_lock(&dirty_i->seglist_lock); + for_each_set_bit(segno, dirty_i->dirty_segmap[DIRTY], MAIN_SEGS(sbi)) { + se = get_seg_entry(sbi, segno); + if (IS_NODESEG(se->type)) + holes[NODE] += f2fs_usable_blks_in_seg(sbi, segno) - + se->valid_blocks; + else + holes[DATA] += f2fs_usable_blks_in_seg(sbi, segno) - + se->valid_blocks; + } + mutex_unlock(&dirty_i->seglist_lock); + + unusable = max(holes[DATA], holes[NODE]); + if (unusable > ovp_holes) + return unusable - ovp_holes; + return 0; +} + +int f2fs_disable_cp_again(struct f2fs_sb_info *sbi, block_t unusable) +{ + int ovp_hole_segs = + (overprovision_segments(sbi) - reserved_segments(sbi)); + + if (F2FS_OPTION(sbi).unusable_cap_perc == 100) + return 0; + if (unusable > F2FS_OPTION(sbi).unusable_cap) + return -EAGAIN; + if (is_sbi_flag_set(sbi, SBI_CP_DISABLED_QUICK) && + dirty_segments(sbi) > ovp_hole_segs) + return -EAGAIN; + if (has_not_enough_free_secs(sbi, 0, 0)) + return -EAGAIN; + return 0; +} + +/* This is only used by SBI_CP_DISABLED */ +static unsigned int get_free_segment(struct f2fs_sb_info *sbi) +{ + struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); + unsigned int segno = 0; + + mutex_lock(&dirty_i->seglist_lock); + for_each_set_bit(segno, dirty_i->dirty_segmap[DIRTY], MAIN_SEGS(sbi)) { + if (get_valid_blocks(sbi, segno, false)) + continue; + if (get_ckpt_valid_blocks(sbi, segno, false)) + continue; + mutex_unlock(&dirty_i->seglist_lock); + return segno; + } + mutex_unlock(&dirty_i->seglist_lock); + return NULL_SEGNO; +} + +static struct discard_cmd *__create_discard_cmd(struct f2fs_sb_info *sbi, + struct block_device *bdev, block_t lstart, + block_t start, block_t len) +{ + struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info; + struct list_head *pend_list; + struct discard_cmd *dc; + + f2fs_bug_on(sbi, !len); + + pend_list = &dcc->pend_list[plist_idx(len)]; + + dc = f2fs_kmem_cache_alloc(discard_cmd_slab, GFP_NOFS, true, NULL); + INIT_LIST_HEAD(&dc->list); + dc->bdev = bdev; + dc->di.lstart = lstart; + dc->di.start = start; + dc->di.len = len; + dc->ref = 0; + dc->state = D_PREP; + dc->queued = 0; + dc->error = 0; + init_completion(&dc->wait); + list_add_tail(&dc->list, pend_list); + spin_lock_init(&dc->lock); + dc->bio_ref = 0; + atomic_inc(&dcc->discard_cmd_cnt); + dcc->undiscard_blks += len; + + return dc; +} + +static bool f2fs_check_discard_tree(struct f2fs_sb_info *sbi) +{ +#ifdef CONFIG_F2FS_CHECK_FS + struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info; + struct rb_node *cur = rb_first_cached(&dcc->root), *next; + struct discard_cmd *cur_dc, *next_dc; + + while (cur) { + next = rb_next(cur); + if (!next) + return true; + + cur_dc = rb_entry(cur, struct discard_cmd, rb_node); + next_dc = rb_entry(next, struct discard_cmd, rb_node); + + if (cur_dc->di.lstart + cur_dc->di.len > next_dc->di.lstart) { + f2fs_info(sbi, "broken discard_rbtree, " + "cur(%u, %u) next(%u, %u)", + cur_dc->di.lstart, cur_dc->di.len, + next_dc->di.lstart, next_dc->di.len); + return false; + } + cur = next; + } +#endif + return true; +} + +static struct discard_cmd *__lookup_discard_cmd(struct f2fs_sb_info *sbi, + block_t blkaddr) +{ + struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info; + struct rb_node *node = dcc->root.rb_root.rb_node; + struct discard_cmd *dc; + + while (node) { + dc = rb_entry(node, struct discard_cmd, rb_node); + + if (blkaddr < dc->di.lstart) + node = node->rb_left; + else if (blkaddr >= dc->di.lstart + dc->di.len) + node = node->rb_right; + else + return dc; + } + return NULL; +} + +static struct discard_cmd *__lookup_discard_cmd_ret(struct rb_root_cached *root, + block_t blkaddr, + struct discard_cmd **prev_entry, + struct discard_cmd **next_entry, + struct rb_node ***insert_p, + struct rb_node **insert_parent) +{ + struct rb_node **pnode = &root->rb_root.rb_node; + struct rb_node *parent = NULL, *tmp_node; + struct discard_cmd *dc; + + *insert_p = NULL; + *insert_parent = NULL; + *prev_entry = NULL; + *next_entry = NULL; + + if (RB_EMPTY_ROOT(&root->rb_root)) + return NULL; + + while (*pnode) { + parent = *pnode; + dc = rb_entry(*pnode, struct discard_cmd, rb_node); + + if (blkaddr < dc->di.lstart) + pnode = &(*pnode)->rb_left; + else if (blkaddr >= dc->di.lstart + dc->di.len) + pnode = &(*pnode)->rb_right; + else + goto lookup_neighbors; + } + + *insert_p = pnode; + *insert_parent = parent; + + dc = rb_entry(parent, struct discard_cmd, rb_node); + tmp_node = parent; + if (parent && blkaddr > dc->di.lstart) + tmp_node = rb_next(parent); + *next_entry = rb_entry_safe(tmp_node, struct discard_cmd, rb_node); + + tmp_node = parent; + if (parent && blkaddr < dc->di.lstart) + tmp_node = rb_prev(parent); + *prev_entry = rb_entry_safe(tmp_node, struct discard_cmd, rb_node); + return NULL; + +lookup_neighbors: + /* lookup prev node for merging backward later */ + tmp_node = rb_prev(&dc->rb_node); + *prev_entry = rb_entry_safe(tmp_node, struct discard_cmd, rb_node); + + /* lookup next node for merging frontward later */ + tmp_node = rb_next(&dc->rb_node); + *next_entry = rb_entry_safe(tmp_node, struct discard_cmd, rb_node); + return dc; +} + +static void __detach_discard_cmd(struct discard_cmd_control *dcc, + struct discard_cmd *dc) +{ + if (dc->state == D_DONE) + atomic_sub(dc->queued, &dcc->queued_discard); + + list_del(&dc->list); + rb_erase_cached(&dc->rb_node, &dcc->root); + dcc->undiscard_blks -= dc->di.len; + + kmem_cache_free(discard_cmd_slab, dc); + + atomic_dec(&dcc->discard_cmd_cnt); +} + +static void __remove_discard_cmd(struct f2fs_sb_info *sbi, + struct discard_cmd *dc) +{ + struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info; + unsigned long flags; + + trace_f2fs_remove_discard(dc->bdev, dc->di.start, dc->di.len); + + spin_lock_irqsave(&dc->lock, flags); + if (dc->bio_ref) { + spin_unlock_irqrestore(&dc->lock, flags); + return; + } + spin_unlock_irqrestore(&dc->lock, flags); + + f2fs_bug_on(sbi, dc->ref); + + if (dc->error == -EOPNOTSUPP) + dc->error = 0; + + if (dc->error) + f2fs_info_ratelimited(sbi, + "Issue discard(%u, %u, %u) failed, ret: %d", + dc->di.lstart, dc->di.start, dc->di.len, dc->error); + __detach_discard_cmd(dcc, dc); +} + +static void f2fs_submit_discard_endio(struct bio *bio) +{ + struct discard_cmd *dc = (struct discard_cmd *)bio->bi_private; + unsigned long flags; + + spin_lock_irqsave(&dc->lock, flags); + if (!dc->error) + dc->error = blk_status_to_errno(bio->bi_status); + dc->bio_ref--; + if (!dc->bio_ref && dc->state == D_SUBMIT) { + dc->state = D_DONE; + complete_all(&dc->wait); + } + spin_unlock_irqrestore(&dc->lock, flags); + bio_put(bio); +} + +static void __check_sit_bitmap(struct f2fs_sb_info *sbi, + block_t start, block_t end) +{ +#ifdef CONFIG_F2FS_CHECK_FS + struct seg_entry *sentry; + unsigned int segno; + block_t blk = start; + unsigned long offset, size, *map; + + while (blk < end) { + segno = GET_SEGNO(sbi, blk); + sentry = get_seg_entry(sbi, segno); + offset = GET_BLKOFF_FROM_SEG0(sbi, blk); + + if (end < START_BLOCK(sbi, segno + 1)) + size = GET_BLKOFF_FROM_SEG0(sbi, end); + else + size = BLKS_PER_SEG(sbi); + map = (unsigned long *)(sentry->cur_valid_map); + offset = __find_rev_next_bit(map, size, offset); + f2fs_bug_on(sbi, offset != size); + blk = START_BLOCK(sbi, segno + 1); + } +#endif +} + +static void __init_discard_policy(struct f2fs_sb_info *sbi, + struct discard_policy *dpolicy, + int discard_type, unsigned int granularity) +{ + struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info; + + /* common policy */ + dpolicy->type = discard_type; + dpolicy->sync = true; + dpolicy->ordered = false; + dpolicy->granularity = granularity; + + dpolicy->max_requests = dcc->max_discard_request; + dpolicy->io_aware_gran = dcc->discard_io_aware_gran; + dpolicy->timeout = false; + + if (discard_type == DPOLICY_BG) { + dpolicy->min_interval = dcc->min_discard_issue_time; + dpolicy->mid_interval = dcc->mid_discard_issue_time; + dpolicy->max_interval = dcc->max_discard_issue_time; + if (dcc->discard_io_aware == DPOLICY_IO_AWARE_ENABLE) + dpolicy->io_aware = true; + else if (dcc->discard_io_aware == DPOLICY_IO_AWARE_DISABLE) + dpolicy->io_aware = false; + dpolicy->sync = false; + dpolicy->ordered = true; + if (utilization(sbi) > dcc->discard_urgent_util) { + dpolicy->granularity = MIN_DISCARD_GRANULARITY; + if (atomic_read(&dcc->discard_cmd_cnt)) + dpolicy->max_interval = + dcc->min_discard_issue_time; + } + } else if (discard_type == DPOLICY_FORCE) { + dpolicy->min_interval = dcc->min_discard_issue_time; + dpolicy->mid_interval = dcc->mid_discard_issue_time; + dpolicy->max_interval = dcc->max_discard_issue_time; + dpolicy->io_aware = false; + } else if (discard_type == DPOLICY_FSTRIM) { + dpolicy->io_aware = false; + } else if (discard_type == DPOLICY_UMOUNT) { + dpolicy->io_aware = false; + /* we need to issue all to keep CP_TRIMMED_FLAG */ + dpolicy->granularity = MIN_DISCARD_GRANULARITY; + dpolicy->timeout = true; + } +} + +static void __update_discard_tree_range(struct f2fs_sb_info *sbi, + struct block_device *bdev, block_t lstart, + block_t start, block_t len); + +#ifdef CONFIG_BLK_DEV_ZONED +static void __submit_zone_reset_cmd(struct f2fs_sb_info *sbi, + struct discard_cmd *dc, blk_opf_t flag, + struct list_head *wait_list, + unsigned int *issued) +{ + struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info; + struct block_device *bdev = dc->bdev; + struct bio *bio = bio_alloc(bdev, 0, REQ_OP_ZONE_RESET | flag, GFP_NOFS); + unsigned long flags; + + trace_f2fs_issue_reset_zone(bdev, dc->di.start); + + spin_lock_irqsave(&dc->lock, flags); + dc->state = D_SUBMIT; + dc->bio_ref++; + spin_unlock_irqrestore(&dc->lock, flags); + + if (issued) + (*issued)++; + + atomic_inc(&dcc->queued_discard); + dc->queued++; + list_move_tail(&dc->list, wait_list); + + /* sanity check on discard range */ + __check_sit_bitmap(sbi, dc->di.lstart, dc->di.lstart + dc->di.len); + + bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(dc->di.start); + bio->bi_private = dc; + bio->bi_end_io = f2fs_submit_discard_endio; + submit_bio(bio); + + atomic_inc(&dcc->issued_discard); + f2fs_update_iostat(sbi, NULL, FS_ZONE_RESET_IO, dc->di.len * F2FS_BLKSIZE); +} +#endif + +/* this function is copied from blkdev_issue_discard from block/blk-lib.c */ +static int __submit_discard_cmd(struct f2fs_sb_info *sbi, + struct discard_policy *dpolicy, + struct discard_cmd *dc, int *issued) +{ + struct block_device *bdev = dc->bdev; + unsigned int max_discard_blocks = + SECTOR_TO_BLOCK(bdev_max_discard_sectors(bdev)); + struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info; + struct list_head *wait_list = (dpolicy->type == DPOLICY_FSTRIM) ? + &(dcc->fstrim_list) : &(dcc->wait_list); + blk_opf_t flag = dpolicy->sync ? REQ_SYNC : 0; + block_t lstart, start, len, total_len; + int err = 0; + + if (dc->state != D_PREP) + return 0; + + if (is_sbi_flag_set(sbi, SBI_NEED_FSCK)) + return 0; + +#ifdef CONFIG_BLK_DEV_ZONED + if (f2fs_sb_has_blkzoned(sbi) && bdev_is_zoned(bdev)) { + int devi = f2fs_bdev_index(sbi, bdev); + + if (devi < 0) + return -EINVAL; + + if (f2fs_blkz_is_seq(sbi, devi, dc->di.start)) { + __submit_zone_reset_cmd(sbi, dc, flag, + wait_list, issued); + return 0; + } + } +#endif + + /* + * stop issuing discard for any of below cases: + * 1. device is conventional zone, but it doesn't support discard. + * 2. device is regulare device, after snapshot it doesn't support + * discard. + */ + if (!bdev_max_discard_sectors(bdev)) + return -EOPNOTSUPP; + + trace_f2fs_issue_discard(bdev, dc->di.start, dc->di.len); + + lstart = dc->di.lstart; + start = dc->di.start; + len = dc->di.len; + total_len = len; + + dc->di.len = 0; + + while (total_len && *issued < dpolicy->max_requests && !err) { + struct bio *bio = NULL; + unsigned long flags; + bool last = true; + + if (len > max_discard_blocks) { + len = max_discard_blocks; + last = false; + } + + (*issued)++; + if (*issued == dpolicy->max_requests) + last = true; + + dc->di.len += len; + + err = 0; + if (time_to_inject(sbi, FAULT_DISCARD)) { + err = -EIO; + spin_lock_irqsave(&dc->lock, flags); + if (dc->state == D_PARTIAL) + dc->state = D_SUBMIT; + spin_unlock_irqrestore(&dc->lock, flags); + + break; + } + + __blkdev_issue_discard(bdev, SECTOR_FROM_BLOCK(start), + SECTOR_FROM_BLOCK(len), GFP_NOFS, &bio); + f2fs_bug_on(sbi, !bio); + + /* + * should keep before submission to avoid D_DONE + * right away + */ + spin_lock_irqsave(&dc->lock, flags); + if (last) + dc->state = D_SUBMIT; + else + dc->state = D_PARTIAL; + dc->bio_ref++; + spin_unlock_irqrestore(&dc->lock, flags); + + atomic_inc(&dcc->queued_discard); + dc->queued++; + list_move_tail(&dc->list, wait_list); + + /* sanity check on discard range */ + __check_sit_bitmap(sbi, lstart, lstart + len); + + bio->bi_private = dc; + bio->bi_end_io = f2fs_submit_discard_endio; + bio->bi_opf |= flag; + submit_bio(bio); + + atomic_inc(&dcc->issued_discard); + + f2fs_update_iostat(sbi, NULL, FS_DISCARD_IO, len * F2FS_BLKSIZE); + + lstart += len; + start += len; + total_len -= len; + len = total_len; + } + + if (!err && len) { + dcc->undiscard_blks -= len; + __update_discard_tree_range(sbi, bdev, lstart, start, len); + } + return err; +} + +static void __insert_discard_cmd(struct f2fs_sb_info *sbi, + struct block_device *bdev, block_t lstart, + block_t start, block_t len) +{ + struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info; + struct rb_node **p = &dcc->root.rb_root.rb_node; + struct rb_node *parent = NULL; + struct discard_cmd *dc; + bool leftmost = true; + + /* look up rb tree to find parent node */ + while (*p) { + parent = *p; + dc = rb_entry(parent, struct discard_cmd, rb_node); + + if (lstart < dc->di.lstart) { + p = &(*p)->rb_left; + } else if (lstart >= dc->di.lstart + dc->di.len) { + p = &(*p)->rb_right; + leftmost = false; + } else { + /* Let's skip to add, if exists */ + return; + } + } + + dc = __create_discard_cmd(sbi, bdev, lstart, start, len); + + rb_link_node(&dc->rb_node, parent, p); + rb_insert_color_cached(&dc->rb_node, &dcc->root, leftmost); +} + +static void __relocate_discard_cmd(struct discard_cmd_control *dcc, + struct discard_cmd *dc) +{ + list_move_tail(&dc->list, &dcc->pend_list[plist_idx(dc->di.len)]); +} + +static void __punch_discard_cmd(struct f2fs_sb_info *sbi, + struct discard_cmd *dc, block_t blkaddr) +{ + struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info; + struct discard_info di = dc->di; + bool modified = false; + + if (dc->state == D_DONE || dc->di.len == 1) { + __remove_discard_cmd(sbi, dc); + return; + } + + dcc->undiscard_blks -= di.len; + + if (blkaddr > di.lstart) { + dc->di.len = blkaddr - dc->di.lstart; + dcc->undiscard_blks += dc->di.len; + __relocate_discard_cmd(dcc, dc); + modified = true; + } + + if (blkaddr < di.lstart + di.len - 1) { + if (modified) { + __insert_discard_cmd(sbi, dc->bdev, blkaddr + 1, + di.start + blkaddr + 1 - di.lstart, + di.lstart + di.len - 1 - blkaddr); + } else { + dc->di.lstart++; + dc->di.len--; + dc->di.start++; + dcc->undiscard_blks += dc->di.len; + __relocate_discard_cmd(dcc, dc); + } + } +} + +static void __update_discard_tree_range(struct f2fs_sb_info *sbi, + struct block_device *bdev, block_t lstart, + block_t start, block_t len) +{ + struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info; + struct discard_cmd *prev_dc = NULL, *next_dc = NULL; + struct discard_cmd *dc; + struct discard_info di = {0}; + struct rb_node **insert_p = NULL, *insert_parent = NULL; + unsigned int max_discard_blocks = + SECTOR_TO_BLOCK(bdev_max_discard_sectors(bdev)); + block_t end = lstart + len; + + dc = __lookup_discard_cmd_ret(&dcc->root, lstart, + &prev_dc, &next_dc, &insert_p, &insert_parent); + if (dc) + prev_dc = dc; + + if (!prev_dc) { + di.lstart = lstart; + di.len = next_dc ? next_dc->di.lstart - lstart : len; + di.len = min(di.len, len); + di.start = start; + } + while (1) { - segno = find_next_bit(dirty_i->dirty_segmap[PRE], total_segs, - segno + 1); - if (segno >= total_segs) + struct rb_node *node; + bool merged = false; + struct discard_cmd *tdc = NULL; + + if (prev_dc) { + di.lstart = prev_dc->di.lstart + prev_dc->di.len; + if (di.lstart < lstart) + di.lstart = lstart; + if (di.lstart >= end) + break; + + if (!next_dc || next_dc->di.lstart > end) + di.len = end - di.lstart; + else + di.len = next_dc->di.lstart - di.lstart; + di.start = start + di.lstart - lstart; + } + + if (!di.len) + goto next; + + if (prev_dc && prev_dc->state == D_PREP && + prev_dc->bdev == bdev && + __is_discard_back_mergeable(&di, &prev_dc->di, + max_discard_blocks)) { + prev_dc->di.len += di.len; + dcc->undiscard_blks += di.len; + __relocate_discard_cmd(dcc, prev_dc); + di = prev_dc->di; + tdc = prev_dc; + merged = true; + } + + if (next_dc && next_dc->state == D_PREP && + next_dc->bdev == bdev && + __is_discard_front_mergeable(&di, &next_dc->di, + max_discard_blocks)) { + next_dc->di.lstart = di.lstart; + next_dc->di.len += di.len; + next_dc->di.start = di.start; + dcc->undiscard_blks += di.len; + __relocate_discard_cmd(dcc, next_dc); + if (tdc) + __remove_discard_cmd(sbi, tdc); + merged = true; + } + + if (!merged) + __insert_discard_cmd(sbi, bdev, + di.lstart, di.start, di.len); + next: + prev_dc = next_dc; + if (!prev_dc) + break; + + node = rb_next(&prev_dc->rb_node); + next_dc = rb_entry_safe(node, struct discard_cmd, rb_node); + } +} + +#ifdef CONFIG_BLK_DEV_ZONED +static void __queue_zone_reset_cmd(struct f2fs_sb_info *sbi, + struct block_device *bdev, block_t blkstart, block_t lblkstart, + block_t blklen) +{ + trace_f2fs_queue_reset_zone(bdev, blkstart); + + mutex_lock(&SM_I(sbi)->dcc_info->cmd_lock); + __insert_discard_cmd(sbi, bdev, lblkstart, blkstart, blklen); + mutex_unlock(&SM_I(sbi)->dcc_info->cmd_lock); +} +#endif + +static void __queue_discard_cmd(struct f2fs_sb_info *sbi, + struct block_device *bdev, block_t blkstart, block_t blklen) +{ + block_t lblkstart = blkstart; + + if (!f2fs_bdev_support_discard(bdev)) + return; + + trace_f2fs_queue_discard(bdev, blkstart, blklen); + + if (f2fs_is_multi_device(sbi)) { + int devi = f2fs_target_device_index(sbi, blkstart); + + blkstart -= FDEV(devi).start_blk; + } + mutex_lock(&SM_I(sbi)->dcc_info->cmd_lock); + __update_discard_tree_range(sbi, bdev, lblkstart, blkstart, blklen); + mutex_unlock(&SM_I(sbi)->dcc_info->cmd_lock); +} + +static void __issue_discard_cmd_orderly(struct f2fs_sb_info *sbi, + struct discard_policy *dpolicy, int *issued) +{ + struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info; + struct discard_cmd *prev_dc = NULL, *next_dc = NULL; + struct rb_node **insert_p = NULL, *insert_parent = NULL; + struct discard_cmd *dc; + struct blk_plug plug; + bool io_interrupted = false; + + mutex_lock(&dcc->cmd_lock); + dc = __lookup_discard_cmd_ret(&dcc->root, dcc->next_pos, + &prev_dc, &next_dc, &insert_p, &insert_parent); + if (!dc) + dc = next_dc; + + blk_start_plug(&plug); + + while (dc) { + struct rb_node *node; + int err = 0; + + if (dc->state != D_PREP) + goto next; + + if (dpolicy->io_aware && !is_idle(sbi, DISCARD_TIME)) { + io_interrupted = true; + break; + } + + dcc->next_pos = dc->di.lstart + dc->di.len; + err = __submit_discard_cmd(sbi, dpolicy, dc, issued); + + if (*issued >= dpolicy->max_requests) break; - __set_test_and_free(sbi, segno); +next: + node = rb_next(&dc->rb_node); + if (err) + __remove_discard_cmd(sbi, dc); + dc = rb_entry_safe(node, struct discard_cmd, rb_node); } + + blk_finish_plug(&plug); + + if (!dc) + dcc->next_pos = 0; + + mutex_unlock(&dcc->cmd_lock); + + if (!(*issued) && io_interrupted) + *issued = -1; +} +static unsigned int __wait_all_discard_cmd(struct f2fs_sb_info *sbi, + struct discard_policy *dpolicy); + +static int __issue_discard_cmd(struct f2fs_sb_info *sbi, + struct discard_policy *dpolicy) +{ + struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info; + struct list_head *pend_list; + struct discard_cmd *dc, *tmp; + struct blk_plug plug; + int i, issued; + bool io_interrupted = false; + + if (dpolicy->timeout) + f2fs_update_time(sbi, UMOUNT_DISCARD_TIMEOUT); + +retry: + issued = 0; + for (i = MAX_PLIST_NUM - 1; i >= 0; i--) { + if (dpolicy->timeout && + f2fs_time_over(sbi, UMOUNT_DISCARD_TIMEOUT)) + break; + + if (i + 1 < dpolicy->granularity) + break; + + if (i + 1 < dcc->max_ordered_discard && dpolicy->ordered) { + __issue_discard_cmd_orderly(sbi, dpolicy, &issued); + return issued; + } + + pend_list = &dcc->pend_list[i]; + + mutex_lock(&dcc->cmd_lock); + if (list_empty(pend_list)) + goto next; + if (unlikely(dcc->rbtree_check)) + f2fs_bug_on(sbi, !f2fs_check_discard_tree(sbi)); + blk_start_plug(&plug); + list_for_each_entry_safe(dc, tmp, pend_list, list) { + f2fs_bug_on(sbi, dc->state != D_PREP); + + if (dpolicy->timeout && + f2fs_time_over(sbi, UMOUNT_DISCARD_TIMEOUT)) + break; + + if (dpolicy->io_aware && i < dpolicy->io_aware_gran && + !is_idle(sbi, DISCARD_TIME)) { + io_interrupted = true; + break; + } + + __submit_discard_cmd(sbi, dpolicy, dc, &issued); + + if (issued >= dpolicy->max_requests) + break; + } + blk_finish_plug(&plug); +next: + mutex_unlock(&dcc->cmd_lock); + + if (issued >= dpolicy->max_requests || io_interrupted) + break; + } + + if (dpolicy->type == DPOLICY_UMOUNT && issued) { + __wait_all_discard_cmd(sbi, dpolicy); + goto retry; + } + + if (!issued && io_interrupted) + issued = -1; + + return issued; +} + +static bool __drop_discard_cmd(struct f2fs_sb_info *sbi) +{ + struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info; + struct list_head *pend_list; + struct discard_cmd *dc, *tmp; + int i; + bool dropped = false; + + mutex_lock(&dcc->cmd_lock); + for (i = MAX_PLIST_NUM - 1; i >= 0; i--) { + pend_list = &dcc->pend_list[i]; + list_for_each_entry_safe(dc, tmp, pend_list, list) { + f2fs_bug_on(sbi, dc->state != D_PREP); + __remove_discard_cmd(sbi, dc); + dropped = true; + } + } + mutex_unlock(&dcc->cmd_lock); + + return dropped; +} + +void f2fs_drop_discard_cmd(struct f2fs_sb_info *sbi) +{ + __drop_discard_cmd(sbi); +} + +static unsigned int __wait_one_discard_bio(struct f2fs_sb_info *sbi, + struct discard_cmd *dc) +{ + struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info; + unsigned int len = 0; + + wait_for_completion_io(&dc->wait); + mutex_lock(&dcc->cmd_lock); + f2fs_bug_on(sbi, dc->state != D_DONE); + dc->ref--; + if (!dc->ref) { + if (!dc->error) + len = dc->di.len; + __remove_discard_cmd(sbi, dc); + } + mutex_unlock(&dcc->cmd_lock); + + return len; +} + +static unsigned int __wait_discard_cmd_range(struct f2fs_sb_info *sbi, + struct discard_policy *dpolicy, + block_t start, block_t end) +{ + struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info; + struct list_head *wait_list = (dpolicy->type == DPOLICY_FSTRIM) ? + &(dcc->fstrim_list) : &(dcc->wait_list); + struct discard_cmd *dc = NULL, *iter, *tmp; + unsigned int trimmed = 0; + +next: + dc = NULL; + + mutex_lock(&dcc->cmd_lock); + list_for_each_entry_safe(iter, tmp, wait_list, list) { + if (iter->di.lstart + iter->di.len <= start || + end <= iter->di.lstart) + continue; + if (iter->di.len < dpolicy->granularity) + continue; + if (iter->state == D_DONE && !iter->ref) { + wait_for_completion_io(&iter->wait); + if (!iter->error) + trimmed += iter->di.len; + __remove_discard_cmd(sbi, iter); + } else { + iter->ref++; + dc = iter; + break; + } + } + mutex_unlock(&dcc->cmd_lock); + + if (dc) { + trimmed += __wait_one_discard_bio(sbi, dc); + goto next; + } + + return trimmed; +} + +static unsigned int __wait_all_discard_cmd(struct f2fs_sb_info *sbi, + struct discard_policy *dpolicy) +{ + struct discard_policy dp; + unsigned int discard_blks; + + if (dpolicy) + return __wait_discard_cmd_range(sbi, dpolicy, 0, UINT_MAX); + + /* wait all */ + __init_discard_policy(sbi, &dp, DPOLICY_FSTRIM, MIN_DISCARD_GRANULARITY); + discard_blks = __wait_discard_cmd_range(sbi, &dp, 0, UINT_MAX); + __init_discard_policy(sbi, &dp, DPOLICY_UMOUNT, MIN_DISCARD_GRANULARITY); + discard_blks += __wait_discard_cmd_range(sbi, &dp, 0, UINT_MAX); + + return discard_blks; +} + +/* This should be covered by global mutex, &sit_i->sentry_lock */ +static void f2fs_wait_discard_bio(struct f2fs_sb_info *sbi, block_t blkaddr) +{ + struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info; + struct discard_cmd *dc; + bool need_wait = false; + + mutex_lock(&dcc->cmd_lock); + dc = __lookup_discard_cmd(sbi, blkaddr); +#ifdef CONFIG_BLK_DEV_ZONED + if (dc && f2fs_sb_has_blkzoned(sbi) && bdev_is_zoned(dc->bdev)) { + int devi = f2fs_bdev_index(sbi, dc->bdev); + + if (devi < 0) { + mutex_unlock(&dcc->cmd_lock); + return; + } + + if (f2fs_blkz_is_seq(sbi, devi, dc->di.start)) { + /* force submit zone reset */ + if (dc->state == D_PREP) + __submit_zone_reset_cmd(sbi, dc, REQ_SYNC, + &dcc->wait_list, NULL); + dc->ref++; + mutex_unlock(&dcc->cmd_lock); + /* wait zone reset */ + __wait_one_discard_bio(sbi, dc); + return; + } + } +#endif + if (dc) { + if (dc->state == D_PREP) { + __punch_discard_cmd(sbi, dc, blkaddr); + } else { + dc->ref++; + need_wait = true; + } + } + mutex_unlock(&dcc->cmd_lock); + + if (need_wait) + __wait_one_discard_bio(sbi, dc); +} + +void f2fs_stop_discard_thread(struct f2fs_sb_info *sbi) +{ + struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info; + + if (dcc && dcc->f2fs_issue_discard) { + struct task_struct *discard_thread = dcc->f2fs_issue_discard; + + dcc->f2fs_issue_discard = NULL; + kthread_stop(discard_thread); + } +} + +/** + * f2fs_issue_discard_timeout() - Issue all discard cmd within UMOUNT_DISCARD_TIMEOUT + * @sbi: the f2fs_sb_info data for discard cmd to issue + * + * When UMOUNT_DISCARD_TIMEOUT is exceeded, all remaining discard commands will be dropped + * + * Return true if issued all discard cmd or no discard cmd need issue, otherwise return false. + */ +bool f2fs_issue_discard_timeout(struct f2fs_sb_info *sbi) +{ + struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info; + struct discard_policy dpolicy; + bool dropped; + + if (!atomic_read(&dcc->discard_cmd_cnt)) + return true; + + __init_discard_policy(sbi, &dpolicy, DPOLICY_UMOUNT, + dcc->discard_granularity); + __issue_discard_cmd(sbi, &dpolicy); + dropped = __drop_discard_cmd(sbi); + + /* just to make sure there is no pending discard commands */ + __wait_all_discard_cmd(sbi, NULL); + + f2fs_bug_on(sbi, atomic_read(&dcc->discard_cmd_cnt)); + return !dropped; +} + +static int issue_discard_thread(void *data) +{ + struct f2fs_sb_info *sbi = data; + struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info; + wait_queue_head_t *q = &dcc->discard_wait_queue; + struct discard_policy dpolicy; + unsigned int wait_ms = dcc->min_discard_issue_time; + int issued; + + set_freezable(); + + do { + wait_event_freezable_timeout(*q, + kthread_should_stop() || dcc->discard_wake, + msecs_to_jiffies(wait_ms)); + + if (sbi->gc_mode == GC_URGENT_HIGH || + !f2fs_available_free_memory(sbi, DISCARD_CACHE)) + __init_discard_policy(sbi, &dpolicy, DPOLICY_FORCE, + MIN_DISCARD_GRANULARITY); + else + __init_discard_policy(sbi, &dpolicy, DPOLICY_BG, + dcc->discard_granularity); + + if (dcc->discard_wake) + dcc->discard_wake = false; + + /* clean up pending candidates before going to sleep */ + if (atomic_read(&dcc->queued_discard)) + __wait_all_discard_cmd(sbi, NULL); + + if (f2fs_readonly(sbi->sb)) + continue; + if (kthread_should_stop()) + return 0; + if (is_sbi_flag_set(sbi, SBI_NEED_FSCK) || + !atomic_read(&dcc->discard_cmd_cnt)) { + wait_ms = dpolicy.max_interval; + continue; + } + + sb_start_intwrite(sbi->sb); + + issued = __issue_discard_cmd(sbi, &dpolicy); + if (issued > 0) { + __wait_all_discard_cmd(sbi, &dpolicy); + wait_ms = dpolicy.min_interval; + } else if (issued == -1) { + wait_ms = f2fs_time_to_wait(sbi, DISCARD_TIME); + if (!wait_ms) + wait_ms = dpolicy.mid_interval; + } else { + wait_ms = dpolicy.max_interval; + } + if (!atomic_read(&dcc->discard_cmd_cnt)) + wait_ms = dpolicy.max_interval; + + sb_end_intwrite(sbi->sb); + + } while (!kthread_should_stop()); + return 0; +} + +#ifdef CONFIG_BLK_DEV_ZONED +static int __f2fs_issue_discard_zone(struct f2fs_sb_info *sbi, + struct block_device *bdev, block_t blkstart, block_t blklen) +{ + sector_t sector, nr_sects; + block_t lblkstart = blkstart; + int devi = 0; + u64 remainder = 0; + + if (f2fs_is_multi_device(sbi)) { + devi = f2fs_target_device_index(sbi, blkstart); + if (blkstart < FDEV(devi).start_blk || + blkstart > FDEV(devi).end_blk) { + f2fs_err(sbi, "Invalid block %x", blkstart); + return -EIO; + } + blkstart -= FDEV(devi).start_blk; + } + + /* For sequential zones, reset the zone write pointer */ + if (f2fs_blkz_is_seq(sbi, devi, blkstart)) { + sector = SECTOR_FROM_BLOCK(blkstart); + nr_sects = SECTOR_FROM_BLOCK(blklen); + div64_u64_rem(sector, bdev_zone_sectors(bdev), &remainder); + + if (remainder || nr_sects != bdev_zone_sectors(bdev)) { + f2fs_err(sbi, "(%d) %s: Unaligned zone reset attempted (block %x + %x)", + devi, sbi->s_ndevs ? FDEV(devi).path : "", + blkstart, blklen); + return -EIO; + } + + if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) { + unsigned int nofs_flags; + int ret; + + trace_f2fs_issue_reset_zone(bdev, blkstart); + nofs_flags = memalloc_nofs_save(); + ret = blkdev_zone_mgmt(bdev, REQ_OP_ZONE_RESET, + sector, nr_sects); + memalloc_nofs_restore(nofs_flags); + return ret; + } + + __queue_zone_reset_cmd(sbi, bdev, blkstart, lblkstart, blklen); + return 0; + } + + /* For conventional zones, use regular discard if supported */ + __queue_discard_cmd(sbi, bdev, lblkstart, blklen); + return 0; +} +#endif + +static int __issue_discard_async(struct f2fs_sb_info *sbi, + struct block_device *bdev, block_t blkstart, block_t blklen) +{ +#ifdef CONFIG_BLK_DEV_ZONED + if (f2fs_sb_has_blkzoned(sbi) && bdev_is_zoned(bdev)) + return __f2fs_issue_discard_zone(sbi, bdev, blkstart, blklen); +#endif + __queue_discard_cmd(sbi, bdev, blkstart, blklen); + return 0; +} + +static int f2fs_issue_discard(struct f2fs_sb_info *sbi, + block_t blkstart, block_t blklen) +{ + sector_t start = blkstart, len = 0; + struct block_device *bdev; + struct seg_entry *se; + unsigned int offset; + block_t i; + int err = 0; + + bdev = f2fs_target_device(sbi, blkstart, NULL); + + for (i = blkstart; i < blkstart + blklen; i++, len++) { + if (i != start) { + struct block_device *bdev2 = + f2fs_target_device(sbi, i, NULL); + + if (bdev2 != bdev) { + err = __issue_discard_async(sbi, bdev, + start, len); + if (err) + return err; + bdev = bdev2; + start = i; + len = 0; + } + } + + se = get_seg_entry(sbi, GET_SEGNO(sbi, i)); + offset = GET_BLKOFF_FROM_SEG0(sbi, i); + + if (f2fs_block_unit_discard(sbi) && + !f2fs_test_and_set_bit(offset, se->discard_map)) + sbi->discard_blks--; + } + + if (len) + err = __issue_discard_async(sbi, bdev, start, len); + return err; +} + +static bool add_discard_addrs(struct f2fs_sb_info *sbi, struct cp_control *cpc, + bool check_only) +{ + int entries = SIT_VBLOCK_MAP_SIZE / sizeof(unsigned long); + struct seg_entry *se = get_seg_entry(sbi, cpc->trim_start); + unsigned long *cur_map = (unsigned long *)se->cur_valid_map; + unsigned long *ckpt_map = (unsigned long *)se->ckpt_valid_map; + unsigned long *discard_map = (unsigned long *)se->discard_map; + unsigned long *dmap = SIT_I(sbi)->tmp_map; + unsigned int start = 0, end = -1; + bool force = (cpc->reason & CP_DISCARD); + struct discard_entry *de = NULL; + struct list_head *head = &SM_I(sbi)->dcc_info->entry_list; + int i; + + if (se->valid_blocks == BLKS_PER_SEG(sbi) || + !f2fs_hw_support_discard(sbi) || + !f2fs_block_unit_discard(sbi)) + return false; + + if (!force) { + if (!f2fs_realtime_discard_enable(sbi) || + (!se->valid_blocks && + !is_curseg(sbi, cpc->trim_start)) || + SM_I(sbi)->dcc_info->nr_discards >= + SM_I(sbi)->dcc_info->max_discards) + return false; + } + + /* SIT_VBLOCK_MAP_SIZE should be multiple of sizeof(unsigned long) */ + for (i = 0; i < entries; i++) + dmap[i] = force ? ~ckpt_map[i] & ~discard_map[i] : + (cur_map[i] ^ ckpt_map[i]) & ckpt_map[i]; + + while (force || SM_I(sbi)->dcc_info->nr_discards <= + SM_I(sbi)->dcc_info->max_discards) { + start = __find_rev_next_bit(dmap, BLKS_PER_SEG(sbi), end + 1); + if (start >= BLKS_PER_SEG(sbi)) + break; + + end = __find_rev_next_zero_bit(dmap, + BLKS_PER_SEG(sbi), start + 1); + if (force && start && end != BLKS_PER_SEG(sbi) && + (end - start) < cpc->trim_minlen) + continue; + + if (check_only) + return true; + + if (!de) { + de = f2fs_kmem_cache_alloc(discard_entry_slab, + GFP_F2FS_ZERO, true, NULL); + de->start_blkaddr = START_BLOCK(sbi, cpc->trim_start); + list_add_tail(&de->list, head); + } + + for (i = start; i < end; i++) + __set_bit_le(i, (void *)de->discard_map); + + SM_I(sbi)->dcc_info->nr_discards += end - start; + } + return false; +} + +static void release_discard_addr(struct discard_entry *entry) +{ + list_del(&entry->list); + kmem_cache_free(discard_entry_slab, entry); +} + +void f2fs_release_discard_addrs(struct f2fs_sb_info *sbi) +{ + struct list_head *head = &(SM_I(sbi)->dcc_info->entry_list); + struct discard_entry *entry, *this; + + /* drop caches */ + list_for_each_entry_safe(entry, this, head, list) + release_discard_addr(entry); +} + +/* + * Should call f2fs_clear_prefree_segments after checkpoint is done. + */ +static void set_prefree_as_free_segments(struct f2fs_sb_info *sbi) +{ + struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); + unsigned int segno; + + mutex_lock(&dirty_i->seglist_lock); + for_each_set_bit(segno, dirty_i->dirty_segmap[PRE], MAIN_SEGS(sbi)) + __set_test_and_free(sbi, segno, false); mutex_unlock(&dirty_i->seglist_lock); } -void clear_prefree_segments(struct f2fs_sb_info *sbi) +void f2fs_clear_prefree_segments(struct f2fs_sb_info *sbi, + struct cp_control *cpc) { + struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info; + struct list_head *head = &dcc->entry_list; + struct discard_entry *entry, *this; struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); - unsigned int segno = -1; - unsigned int total_segs = TOTAL_SEGS(sbi); + unsigned long *prefree_map = dirty_i->dirty_segmap[PRE]; + unsigned int start = 0, end = -1; + unsigned int secno, start_segno; + bool force = (cpc->reason & CP_DISCARD); + bool section_alignment = F2FS_OPTION(sbi).discard_unit == + DISCARD_UNIT_SECTION; + + if (f2fs_lfs_mode(sbi) && __is_large_section(sbi)) + section_alignment = true; mutex_lock(&dirty_i->seglist_lock); + while (1) { - segno = find_next_bit(dirty_i->dirty_segmap[PRE], total_segs, - segno + 1); - if (segno >= total_segs) + int i; + + if (section_alignment && end != -1) + end--; + start = find_next_bit(prefree_map, MAIN_SEGS(sbi), end + 1); + if (start >= MAIN_SEGS(sbi)) break; + end = find_next_zero_bit(prefree_map, MAIN_SEGS(sbi), + start + 1); - if (test_and_clear_bit(segno, dirty_i->dirty_segmap[PRE])) - dirty_i->nr_dirty[PRE]--; + if (section_alignment) { + start = rounddown(start, SEGS_PER_SEC(sbi)); + end = roundup(end, SEGS_PER_SEC(sbi)); + } - /* Let's use trim */ - if (test_opt(sbi, DISCARD)) - blkdev_issue_discard(sbi->sb->s_bdev, - START_BLOCK(sbi, segno) << - sbi->log_sectors_per_block, - 1 << (sbi->log_sectors_per_block + - sbi->log_blocks_per_seg), - GFP_NOFS, 0); + for (i = start; i < end; i++) { + if (test_and_clear_bit(i, prefree_map)) + dirty_i->nr_dirty[PRE]--; + } + + if (!f2fs_realtime_discard_enable(sbi)) + continue; + + if (force && start >= cpc->trim_start && + (end - 1) <= cpc->trim_end) + continue; + + /* Should cover 2MB zoned device for zone-based reset */ + if (!f2fs_sb_has_blkzoned(sbi) && + (!f2fs_lfs_mode(sbi) || !__is_large_section(sbi))) { + f2fs_issue_discard(sbi, START_BLOCK(sbi, start), + SEGS_TO_BLKS(sbi, end - start)); + continue; + } +next: + secno = GET_SEC_FROM_SEG(sbi, start); + start_segno = GET_SEG_FROM_SEC(sbi, secno); + if (!is_cursec(sbi, secno) && + !get_valid_blocks(sbi, start, true)) + f2fs_issue_discard(sbi, START_BLOCK(sbi, start_segno), + BLKS_PER_SEC(sbi)); + + start = start_segno + SEGS_PER_SEC(sbi); + if (start < end) + goto next; + else + end = start - 1; } mutex_unlock(&dirty_i->seglist_lock); + + if (!f2fs_block_unit_discard(sbi)) + goto wakeup; + + /* send small discards */ + list_for_each_entry_safe(entry, this, head, list) { + unsigned int cur_pos = 0, next_pos, len, total_len = 0; + bool is_valid = test_bit_le(0, entry->discard_map); + +find_next: + if (is_valid) { + next_pos = find_next_zero_bit_le(entry->discard_map, + BLKS_PER_SEG(sbi), cur_pos); + len = next_pos - cur_pos; + + if (f2fs_sb_has_blkzoned(sbi) || + (force && len < cpc->trim_minlen)) + goto skip; + + f2fs_issue_discard(sbi, entry->start_blkaddr + cur_pos, + len); + total_len += len; + } else { + next_pos = find_next_bit_le(entry->discard_map, + BLKS_PER_SEG(sbi), cur_pos); + } +skip: + cur_pos = next_pos; + is_valid = !is_valid; + + if (cur_pos < BLKS_PER_SEG(sbi)) + goto find_next; + + release_discard_addr(entry); + dcc->nr_discards -= total_len; + } + +wakeup: + wake_up_discard_thread(sbi, false); +} + +int f2fs_start_discard_thread(struct f2fs_sb_info *sbi) +{ + dev_t dev = sbi->sb->s_bdev->bd_dev; + struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info; + int err = 0; + + if (f2fs_sb_has_readonly(sbi)) { + f2fs_info(sbi, + "Skip to start discard thread for readonly image"); + return 0; + } + + if (!f2fs_realtime_discard_enable(sbi)) + return 0; + + dcc->f2fs_issue_discard = kthread_run(issue_discard_thread, sbi, + "f2fs_discard-%u:%u", MAJOR(dev), MINOR(dev)); + if (IS_ERR(dcc->f2fs_issue_discard)) { + err = PTR_ERR(dcc->f2fs_issue_discard); + dcc->f2fs_issue_discard = NULL; + } + + return err; +} + +static int create_discard_cmd_control(struct f2fs_sb_info *sbi) +{ + struct discard_cmd_control *dcc; + int err = 0, i; + + if (SM_I(sbi)->dcc_info) { + dcc = SM_I(sbi)->dcc_info; + goto init_thread; + } + + dcc = f2fs_kzalloc(sbi, sizeof(struct discard_cmd_control), GFP_KERNEL); + if (!dcc) + return -ENOMEM; + + dcc->discard_io_aware_gran = MAX_PLIST_NUM; + dcc->discard_granularity = DEFAULT_DISCARD_GRANULARITY; + dcc->max_ordered_discard = DEFAULT_MAX_ORDERED_DISCARD_GRANULARITY; + dcc->discard_io_aware = DPOLICY_IO_AWARE_ENABLE; + if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SEGMENT || + F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SECTION) + dcc->discard_granularity = BLKS_PER_SEG(sbi); + + INIT_LIST_HEAD(&dcc->entry_list); + for (i = 0; i < MAX_PLIST_NUM; i++) + INIT_LIST_HEAD(&dcc->pend_list[i]); + INIT_LIST_HEAD(&dcc->wait_list); + INIT_LIST_HEAD(&dcc->fstrim_list); + mutex_init(&dcc->cmd_lock); + atomic_set(&dcc->issued_discard, 0); + atomic_set(&dcc->queued_discard, 0); + atomic_set(&dcc->discard_cmd_cnt, 0); + dcc->nr_discards = 0; + dcc->max_discards = SEGS_TO_BLKS(sbi, MAIN_SEGS(sbi)); + dcc->max_discard_request = DEF_MAX_DISCARD_REQUEST; + dcc->min_discard_issue_time = DEF_MIN_DISCARD_ISSUE_TIME; + dcc->mid_discard_issue_time = DEF_MID_DISCARD_ISSUE_TIME; + dcc->max_discard_issue_time = DEF_MAX_DISCARD_ISSUE_TIME; + dcc->discard_urgent_util = DEF_DISCARD_URGENT_UTIL; + dcc->undiscard_blks = 0; + dcc->next_pos = 0; + dcc->root = RB_ROOT_CACHED; + dcc->rbtree_check = false; + + init_waitqueue_head(&dcc->discard_wait_queue); + SM_I(sbi)->dcc_info = dcc; +init_thread: + err = f2fs_start_discard_thread(sbi); + if (err) { + kfree(dcc); + SM_I(sbi)->dcc_info = NULL; + } + + return err; +} + +static void destroy_discard_cmd_control(struct f2fs_sb_info *sbi) +{ + struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info; + + if (!dcc) + return; + + f2fs_stop_discard_thread(sbi); + + /* + * Recovery can cache discard commands, so in error path of + * fill_super(), it needs to give a chance to handle them. + */ + f2fs_issue_discard_timeout(sbi); + + kfree(dcc); + SM_I(sbi)->dcc_info = NULL; } -static void __mark_sit_entry_dirty(struct f2fs_sb_info *sbi, unsigned int segno) +static bool __mark_sit_entry_dirty(struct f2fs_sb_info *sbi, unsigned int segno) { struct sit_info *sit_i = SIT_I(sbi); - if (!__test_and_set_bit(segno, sit_i->dirty_sentries_bitmap)) + + if (!__test_and_set_bit(segno, sit_i->dirty_sentries_bitmap)) { sit_i->dirty_sentries++; + return false; + } + + return true; } static void __set_sit_entry_type(struct f2fs_sb_info *sbi, int type, unsigned int segno, int modified) { struct seg_entry *se = get_seg_entry(sbi, segno); + se->type = type; if (modified) __mark_sit_entry_dirty(sbi, segno); } +static inline unsigned long long get_segment_mtime(struct f2fs_sb_info *sbi, + block_t blkaddr) +{ + unsigned int segno = GET_SEGNO(sbi, blkaddr); + + if (segno == NULL_SEGNO) + return 0; + return get_seg_entry(sbi, segno)->mtime; +} + +static void update_segment_mtime(struct f2fs_sb_info *sbi, block_t blkaddr, + unsigned long long old_mtime) +{ + struct seg_entry *se; + unsigned int segno = GET_SEGNO(sbi, blkaddr); + unsigned long long ctime = get_mtime(sbi, false); + unsigned long long mtime = old_mtime ? old_mtime : ctime; + + if (segno == NULL_SEGNO) + return; + + se = get_seg_entry(sbi, segno); + + if (!se->mtime) + se->mtime = mtime; + else + se->mtime = div_u64(se->mtime * se->valid_blocks + mtime, + se->valid_blocks + 1); + + if (ctime > SIT_I(sbi)->max_mtime) + SIT_I(sbi)->max_mtime = ctime; +} + +/* + * NOTE: when updating multiple blocks at the same time, please ensure + * that the consecutive input blocks belong to the same segment. + */ +static int update_sit_entry_for_release(struct f2fs_sb_info *sbi, struct seg_entry *se, + unsigned int segno, block_t blkaddr, unsigned int offset, int del) +{ + bool exist; +#ifdef CONFIG_F2FS_CHECK_FS + bool mir_exist; +#endif + int i; + int del_count = -del; + + f2fs_bug_on(sbi, GET_SEGNO(sbi, blkaddr) != GET_SEGNO(sbi, blkaddr + del_count - 1)); + + for (i = 0; i < del_count; i++) { + exist = f2fs_test_and_clear_bit(offset + i, se->cur_valid_map); +#ifdef CONFIG_F2FS_CHECK_FS + mir_exist = f2fs_test_and_clear_bit(offset + i, + se->cur_valid_map_mir); + if (unlikely(exist != mir_exist)) { + f2fs_err(sbi, "Inconsistent error when clearing bitmap, blk:%u, old bit:%d", + blkaddr + i, exist); + f2fs_bug_on(sbi, 1); + } +#endif + if (unlikely(!exist)) { + f2fs_err(sbi, "Bitmap was wrongly cleared, blk:%u", blkaddr + i); + f2fs_bug_on(sbi, 1); + se->valid_blocks++; + del += 1; + } else if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) { + /* + * If checkpoints are off, we must not reuse data that + * was used in the previous checkpoint. If it was used + * before, we must track that to know how much space we + * really have. + */ + if (f2fs_test_bit(offset + i, se->ckpt_valid_map)) { + spin_lock(&sbi->stat_lock); + sbi->unusable_block_count++; + spin_unlock(&sbi->stat_lock); + } + } + + if (f2fs_block_unit_discard(sbi) && + f2fs_test_and_clear_bit(offset + i, se->discard_map)) + sbi->discard_blks++; + + if (!f2fs_test_bit(offset + i, se->ckpt_valid_map)) { + se->ckpt_valid_blocks -= 1; + if (__is_large_section(sbi)) + get_sec_entry(sbi, segno)->ckpt_valid_blocks -= 1; + } + } + + if (__is_large_section(sbi)) + sanity_check_valid_blocks(sbi, segno); + + return del; +} + +static int update_sit_entry_for_alloc(struct f2fs_sb_info *sbi, struct seg_entry *se, + unsigned int segno, block_t blkaddr, unsigned int offset, int del) +{ + bool exist; +#ifdef CONFIG_F2FS_CHECK_FS + bool mir_exist; +#endif + + exist = f2fs_test_and_set_bit(offset, se->cur_valid_map); +#ifdef CONFIG_F2FS_CHECK_FS + mir_exist = f2fs_test_and_set_bit(offset, + se->cur_valid_map_mir); + if (unlikely(exist != mir_exist)) { + f2fs_err(sbi, "Inconsistent error when setting bitmap, blk:%u, old bit:%d", + blkaddr, exist); + f2fs_bug_on(sbi, 1); + } +#endif + if (unlikely(exist)) { + f2fs_err(sbi, "Bitmap was wrongly set, blk:%u", blkaddr); + f2fs_bug_on(sbi, 1); + se->valid_blocks--; + del = 0; + } + + if (f2fs_block_unit_discard(sbi) && + !f2fs_test_and_set_bit(offset, se->discard_map)) + sbi->discard_blks--; + + /* + * SSR should never reuse block which is checkpointed + * or newly invalidated. + */ + if (!is_sbi_flag_set(sbi, SBI_CP_DISABLED)) { + if (!f2fs_test_and_set_bit(offset, se->ckpt_valid_map)) { + se->ckpt_valid_blocks++; + if (__is_large_section(sbi)) + get_sec_entry(sbi, segno)->ckpt_valid_blocks++; + } + } + + if (!f2fs_test_bit(offset, se->ckpt_valid_map)) { + se->ckpt_valid_blocks += del; + if (__is_large_section(sbi)) + get_sec_entry(sbi, segno)->ckpt_valid_blocks += del; + } + + if (__is_large_section(sbi)) + sanity_check_valid_blocks(sbi, segno); + + return del; +} + +/* + * If releasing blocks, this function supports updating multiple consecutive blocks + * at one time, but please note that these consecutive blocks need to belong to the + * same segment. + */ static void update_sit_entry(struct f2fs_sb_info *sbi, block_t blkaddr, int del) { struct seg_entry *se; @@ -191,131 +2567,213 @@ static void update_sit_entry(struct f2fs_sb_info *sbi, block_t blkaddr, int del) long int new_vblocks; segno = GET_SEGNO(sbi, blkaddr); + if (segno == NULL_SEGNO) + return; se = get_seg_entry(sbi, segno); new_vblocks = se->valid_blocks + del; - offset = GET_SEGOFF_FROM_SEG0(sbi, blkaddr) & (sbi->blocks_per_seg - 1); + offset = GET_BLKOFF_FROM_SEG0(sbi, blkaddr); - BUG_ON((new_vblocks >> (sizeof(unsigned short) << 3) || - (new_vblocks > sbi->blocks_per_seg))); + f2fs_bug_on(sbi, (new_vblocks < 0 || + (new_vblocks > f2fs_usable_blks_in_seg(sbi, segno)))); se->valid_blocks = new_vblocks; - se->mtime = get_mtime(sbi); - SIT_I(sbi)->max_mtime = se->mtime; /* Update valid block bitmap */ if (del > 0) { - if (f2fs_set_bit(offset, se->cur_valid_map)) - BUG(); + del = update_sit_entry_for_alloc(sbi, se, segno, blkaddr, offset, del); } else { - if (!f2fs_clear_bit(offset, se->cur_valid_map)) - BUG(); + del = update_sit_entry_for_release(sbi, se, segno, blkaddr, offset, del); } - if (!f2fs_test_bit(offset, se->ckpt_valid_map)) - se->ckpt_valid_blocks += del; __mark_sit_entry_dirty(sbi, segno); /* update total number of valid blocks to be written in ckpt area */ SIT_I(sbi)->written_valid_blocks += del; - if (sbi->segs_per_sec > 1) + if (__is_large_section(sbi)) get_sec_entry(sbi, segno)->valid_blocks += del; } -static void refresh_sit_entry(struct f2fs_sb_info *sbi, - block_t old_blkaddr, block_t new_blkaddr) -{ - update_sit_entry(sbi, new_blkaddr, 1); - if (GET_SEGNO(sbi, old_blkaddr) != NULL_SEGNO) - update_sit_entry(sbi, old_blkaddr, -1); -} - -void invalidate_blocks(struct f2fs_sb_info *sbi, block_t addr) +void f2fs_invalidate_blocks(struct f2fs_sb_info *sbi, block_t addr, + unsigned int len) { unsigned int segno = GET_SEGNO(sbi, addr); struct sit_info *sit_i = SIT_I(sbi); + block_t addr_start = addr, addr_end = addr + len - 1; + unsigned int seg_num = GET_SEGNO(sbi, addr_end) - segno + 1; + unsigned int i = 1, max_blocks = sbi->blocks_per_seg, cnt; - BUG_ON(addr == NULL_ADDR); - if (addr == NEW_ADDR) + f2fs_bug_on(sbi, addr == NULL_ADDR); + if (addr == NEW_ADDR || addr == COMPRESS_ADDR) return; + f2fs_invalidate_internal_cache(sbi, addr, len); + /* add it into sit main buffer */ - mutex_lock(&sit_i->sentry_lock); + down_write(&sit_i->sentry_lock); + + if (seg_num == 1) + cnt = len; + else + cnt = max_blocks - GET_BLKOFF_FROM_SEG0(sbi, addr); - update_sit_entry(sbi, addr, -1); + do { + update_segment_mtime(sbi, addr_start, 0); + update_sit_entry(sbi, addr_start, -cnt); - /* add it into dirty seglist */ - locate_dirty_segment(sbi, segno); + /* add it into dirty seglist */ + locate_dirty_segment(sbi, segno); - mutex_unlock(&sit_i->sentry_lock); + /* update @addr_start and @cnt and @segno */ + addr_start = START_BLOCK(sbi, ++segno); + if (++i == seg_num) + cnt = GET_BLKOFF_FROM_SEG0(sbi, addr_end) + 1; + else + cnt = max_blocks; + } while (i <= seg_num); + + up_write(&sit_i->sentry_lock); } -/* - * This function should be resided under the curseg_mutex lock - */ -static void __add_sum_entry(struct f2fs_sb_info *sbi, int type, - struct f2fs_summary *sum) +bool f2fs_is_checkpointed_data(struct f2fs_sb_info *sbi, block_t blkaddr) +{ + struct sit_info *sit_i = SIT_I(sbi); + unsigned int segno, offset; + struct seg_entry *se; + bool is_cp = false; + + if (!__is_valid_data_blkaddr(blkaddr)) + return true; + + down_read(&sit_i->sentry_lock); + + segno = GET_SEGNO(sbi, blkaddr); + se = get_seg_entry(sbi, segno); + offset = GET_BLKOFF_FROM_SEG0(sbi, blkaddr); + + if (f2fs_test_bit(offset, se->ckpt_valid_map)) + is_cp = true; + + up_read(&sit_i->sentry_lock); + + return is_cp; +} + +static unsigned short f2fs_curseg_valid_blocks(struct f2fs_sb_info *sbi, int type) { struct curseg_info *curseg = CURSEG_I(sbi, type); - void *addr = curseg->sum_blk; - addr += curseg->next_blkoff * sizeof(struct f2fs_summary); - memcpy(addr, sum, sizeof(struct f2fs_summary)); - return; + + if (sbi->ckpt->alloc_type[type] == SSR) + return BLKS_PER_SEG(sbi); + return curseg->next_blkoff; } /* * Calculate the number of current summary pages for writing */ -int npages_for_summary_flush(struct f2fs_sb_info *sbi) +int f2fs_npages_for_summary_flush(struct f2fs_sb_info *sbi, bool for_ra) { - int total_size_bytes = 0; int valid_sum_count = 0; - int i, sum_space; + int i, sum_in_page; for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) { - if (sbi->ckpt->alloc_type[i] == SSR) - valid_sum_count += sbi->blocks_per_seg; + if (sbi->ckpt->alloc_type[i] != SSR && for_ra) + valid_sum_count += + le16_to_cpu(F2FS_CKPT(sbi)->cur_data_blkoff[i]); else - valid_sum_count += curseg_blkoff(sbi, i); + valid_sum_count += f2fs_curseg_valid_blocks(sbi, i); } - total_size_bytes = valid_sum_count * (SUMMARY_SIZE + 1) - + sizeof(struct nat_journal) + 2 - + sizeof(struct sit_journal) + 2; - sum_space = PAGE_CACHE_SIZE - SUM_FOOTER_SIZE; - if (total_size_bytes < sum_space) + sum_in_page = (PAGE_SIZE - 2 * SUM_JOURNAL_SIZE - + SUM_FOOTER_SIZE) / SUMMARY_SIZE; + if (valid_sum_count <= sum_in_page) return 1; - else if (total_size_bytes < 2 * sum_space) + else if ((valid_sum_count - sum_in_page) <= + (PAGE_SIZE - SUM_FOOTER_SIZE) / SUMMARY_SIZE) return 2; return 3; } /* - * Caller should put this summary page + * Caller should put this summary folio */ -struct page *get_sum_page(struct f2fs_sb_info *sbi, unsigned int segno) +struct folio *f2fs_get_sum_folio(struct f2fs_sb_info *sbi, unsigned int segno) +{ + if (unlikely(f2fs_cp_error(sbi))) + return ERR_PTR(-EIO); + return f2fs_get_meta_folio_retry(sbi, GET_SUM_BLOCK(sbi, segno)); +} + +void f2fs_update_meta_page(struct f2fs_sb_info *sbi, + void *src, block_t blk_addr) { - return get_meta_page(sbi, GET_SUM_BLOCK(sbi, segno)); + struct folio *folio; + + if (SUMS_PER_BLOCK == 1) + folio = f2fs_grab_meta_folio(sbi, blk_addr); + else + folio = f2fs_get_meta_folio_retry(sbi, blk_addr); + + if (IS_ERR(folio)) + return; + + memcpy(folio_address(folio), src, PAGE_SIZE); + folio_mark_dirty(folio); + f2fs_folio_put(folio, true); } static void write_sum_page(struct f2fs_sb_info *sbi, - struct f2fs_summary_block *sum_blk, block_t blk_addr) + struct f2fs_summary_block *sum_blk, unsigned int segno) { - struct page *page = grab_meta_page(sbi, blk_addr); - void *kaddr = page_address(page); - memcpy(kaddr, sum_blk, PAGE_CACHE_SIZE); - set_page_dirty(page); - f2fs_put_page(page, 1); + struct folio *folio; + + if (SUMS_PER_BLOCK == 1) + return f2fs_update_meta_page(sbi, (void *)sum_blk, + GET_SUM_BLOCK(sbi, segno)); + + folio = f2fs_get_sum_folio(sbi, segno); + if (IS_ERR(folio)) + return; + + memcpy(SUM_BLK_PAGE_ADDR(folio, segno), sum_blk, sizeof(*sum_blk)); + folio_mark_dirty(folio); + f2fs_folio_put(folio, true); } -static int is_next_segment_free(struct f2fs_sb_info *sbi, int type) +static void write_current_sum_page(struct f2fs_sb_info *sbi, + int type, block_t blk_addr) { struct curseg_info *curseg = CURSEG_I(sbi, type); + struct folio *folio = f2fs_grab_meta_folio(sbi, blk_addr); + struct f2fs_summary_block *src = curseg->sum_blk; + struct f2fs_summary_block *dst; + + dst = folio_address(folio); + memset(dst, 0, PAGE_SIZE); + + mutex_lock(&curseg->curseg_mutex); + + down_read(&curseg->journal_rwsem); + memcpy(&dst->journal, curseg->journal, SUM_JOURNAL_SIZE); + up_read(&curseg->journal_rwsem); + + memcpy(dst->entries, src->entries, SUM_ENTRY_SIZE); + memcpy(&dst->footer, &src->footer, SUM_FOOTER_SIZE); + + mutex_unlock(&curseg->curseg_mutex); + + folio_mark_dirty(folio); + f2fs_folio_put(folio, true); +} + +static int is_next_segment_free(struct f2fs_sb_info *sbi, + struct curseg_info *curseg) +{ unsigned int segno = curseg->segno + 1; struct free_segmap_info *free_i = FREE_I(sbi); - if (segno < TOTAL_SEGS(sbi) && segno % sbi->segs_per_sec) + if (segno < MAIN_SEGS(sbi) && segno % SEGS_PER_SEC(sbi)) return !test_bit(segno, free_i->free_segmap); return 0; } @@ -324,58 +2782,95 @@ static int is_next_segment_free(struct f2fs_sb_info *sbi, int type) * Find a new segment from the free segments bitmap to right order * This function should be returned with success, otherwise BUG */ -static void get_new_segment(struct f2fs_sb_info *sbi, - unsigned int *newseg, bool new_sec, int dir) +static int get_new_segment(struct f2fs_sb_info *sbi, + unsigned int *newseg, bool new_sec, bool pinning) { struct free_segmap_info *free_i = FREE_I(sbi); unsigned int segno, secno, zoneno; - unsigned int total_zones = TOTAL_SECS(sbi) / sbi->secs_per_zone; - unsigned int hint = *newseg / sbi->segs_per_sec; - unsigned int old_zoneno = GET_ZONENO_FROM_SEGNO(sbi, *newseg); - unsigned int left_start = hint; + unsigned int total_zones = MAIN_SECS(sbi) / sbi->secs_per_zone; + unsigned int hint = GET_SEC_FROM_SEG(sbi, *newseg); + unsigned int old_zoneno = GET_ZONE_FROM_SEG(sbi, *newseg); + unsigned int alloc_policy = sbi->allocate_section_policy; + unsigned int alloc_hint = sbi->allocate_section_hint; bool init = true; - int go_left = 0; int i; + int ret = 0; + + spin_lock(&free_i->segmap_lock); - write_lock(&free_i->segmap_lock); + if (time_to_inject(sbi, FAULT_NO_SEGMENT)) { + ret = -ENOSPC; + goto out_unlock; + } - if (!new_sec && ((*newseg + 1) % sbi->segs_per_sec)) { + if (!new_sec && ((*newseg + 1) % SEGS_PER_SEC(sbi))) { segno = find_next_zero_bit(free_i->free_segmap, - TOTAL_SEGS(sbi), *newseg + 1); - if (segno - *newseg < sbi->segs_per_sec - - (*newseg % sbi->segs_per_sec)) + GET_SEG_FROM_SEC(sbi, hint + 1), *newseg + 1); + if (segno < GET_SEG_FROM_SEC(sbi, hint + 1)) goto got_it; } + +#ifdef CONFIG_BLK_DEV_ZONED + /* + * If we format f2fs on zoned storage, let's try to get pinned sections + * from beginning of the storage, which should be a conventional one. + */ + if (f2fs_sb_has_blkzoned(sbi)) { + /* Prioritize writing to conventional zones */ + if (sbi->blkzone_alloc_policy == BLKZONE_ALLOC_PRIOR_CONV || pinning) + segno = 0; + else + segno = max(sbi->first_seq_zone_segno, *newseg); + hint = GET_SEC_FROM_SEG(sbi, segno); + } +#endif + + /* + * Prevent allocate_section_hint from exceeding MAIN_SECS() + * due to desynchronization. + */ + if (alloc_policy != ALLOCATE_FORWARD_NOHINT && + alloc_hint > MAIN_SECS(sbi)) + alloc_hint = MAIN_SECS(sbi); + + if (alloc_policy == ALLOCATE_FORWARD_FROM_HINT && + hint < alloc_hint) + hint = alloc_hint; + else if (alloc_policy == ALLOCATE_FORWARD_WITHIN_HINT && + hint >= alloc_hint) + hint = 0; + find_other_zone: - secno = find_next_zero_bit(free_i->free_secmap, TOTAL_SECS(sbi), hint); - if (secno >= TOTAL_SECS(sbi)) { - if (dir == ALLOC_RIGHT) { - secno = find_next_zero_bit(free_i->free_secmap, - TOTAL_SECS(sbi), 0); - BUG_ON(secno >= TOTAL_SECS(sbi)); - } else { - go_left = 1; - left_start = hint - 1; + secno = find_next_zero_bit(free_i->free_secmap, MAIN_SECS(sbi), hint); + +#ifdef CONFIG_BLK_DEV_ZONED + if (secno >= MAIN_SECS(sbi) && f2fs_sb_has_blkzoned(sbi)) { + /* Write only to sequential zones */ + if (sbi->blkzone_alloc_policy == BLKZONE_ALLOC_ONLY_SEQ) { + hint = GET_SEC_FROM_SEG(sbi, sbi->first_seq_zone_segno); + secno = find_next_zero_bit(free_i->free_secmap, MAIN_SECS(sbi), hint); + } else + secno = find_first_zero_bit(free_i->free_secmap, + MAIN_SECS(sbi)); + if (secno >= MAIN_SECS(sbi)) { + ret = -ENOSPC; + f2fs_bug_on(sbi, 1); + goto out_unlock; } } - if (go_left == 0) - goto skip_left; +#endif - while (test_bit(left_start, free_i->free_secmap)) { - if (left_start > 0) { - left_start--; - continue; + if (secno >= MAIN_SECS(sbi)) { + secno = find_first_zero_bit(free_i->free_secmap, + MAIN_SECS(sbi)); + if (secno >= MAIN_SECS(sbi)) { + ret = -ENOSPC; + f2fs_bug_on(sbi, !pinning); + goto out_unlock; } - left_start = find_next_zero_bit(free_i->free_secmap, - TOTAL_SECS(sbi), 0); - BUG_ON(left_start >= TOTAL_SECS(sbi)); - break; } - secno = left_start; -skip_left: - hint = secno; - segno = secno * sbi->segs_per_sec; - zoneno = secno / sbi->secs_per_zone; + segno = GET_SEG_FROM_SEC(sbi, secno); + zoneno = GET_ZONE_FROM_SEC(sbi, secno); /* give up on finding another zone */ if (!init) @@ -384,21 +2879,13 @@ skip_left: goto got_it; if (zoneno == old_zoneno) goto got_it; - if (dir == ALLOC_LEFT) { - if (!go_left && zoneno + 1 >= total_zones) - goto got_it; - if (go_left && zoneno == 0) - goto got_it; - } for (i = 0; i < NR_CURSEG_TYPE; i++) if (CURSEG_I(sbi, i)->zone == zoneno) break; if (i < NR_CURSEG_TYPE) { /* zone is in user, try another */ - if (go_left) - hint = zoneno * sbi->secs_per_zone - 1; - else if (zoneno + 1 >= total_zones) + if (zoneno + 1 >= total_zones) hint = 0; else hint = (zoneno + 1) * sbi->secs_per_zone; @@ -407,96 +2894,176 @@ skip_left: } got_it: /* set it as dirty segment in free segmap */ - BUG_ON(test_bit(segno, free_i->free_segmap)); + if (test_bit(segno, free_i->free_segmap)) { + ret = -EFSCORRUPTED; + f2fs_stop_checkpoint(sbi, false, STOP_CP_REASON_CORRUPTED_FREE_BITMAP); + goto out_unlock; + } + + /* no free section in conventional device or conventional zone */ + if (new_sec && pinning && + f2fs_is_sequential_zone_area(sbi, START_BLOCK(sbi, segno))) { + ret = -EAGAIN; + goto out_unlock; + } __set_inuse(sbi, segno); *newseg = segno; - write_unlock(&free_i->segmap_lock); +out_unlock: + spin_unlock(&free_i->segmap_lock); + + if (ret == -ENOSPC && !pinning) + f2fs_stop_checkpoint(sbi, false, STOP_CP_REASON_NO_SEGMENT); + return ret; } static void reset_curseg(struct f2fs_sb_info *sbi, int type, int modified) { struct curseg_info *curseg = CURSEG_I(sbi, type); struct summary_footer *sum_footer; + unsigned short seg_type = curseg->seg_type; + + /* only happen when get_new_segment() fails */ + if (curseg->next_segno == NULL_SEGNO) + return; + curseg->inited = true; curseg->segno = curseg->next_segno; - curseg->zone = GET_ZONENO_FROM_SEGNO(sbi, curseg->segno); + curseg->zone = GET_ZONE_FROM_SEG(sbi, curseg->segno); curseg->next_blkoff = 0; curseg->next_segno = NULL_SEGNO; sum_footer = &(curseg->sum_blk->footer); memset(sum_footer, 0, sizeof(struct summary_footer)); - if (IS_DATASEG(type)) + + sanity_check_seg_type(sbi, seg_type); + + if (IS_DATASEG(seg_type)) SET_SUM_TYPE(sum_footer, SUM_TYPE_DATA); - if (IS_NODESEG(type)) + if (IS_NODESEG(seg_type)) SET_SUM_TYPE(sum_footer, SUM_TYPE_NODE); - __set_sit_entry_type(sbi, type, curseg->segno, modified); + __set_sit_entry_type(sbi, seg_type, curseg->segno, modified); +} + +static unsigned int __get_next_segno(struct f2fs_sb_info *sbi, int type) +{ + struct curseg_info *curseg = CURSEG_I(sbi, type); + unsigned short seg_type = curseg->seg_type; + + sanity_check_seg_type(sbi, seg_type); + if (__is_large_section(sbi)) { + if (f2fs_need_rand_seg(sbi)) { + unsigned int hint = GET_SEC_FROM_SEG(sbi, curseg->segno); + + if (GET_SEC_FROM_SEG(sbi, curseg->segno + 1) != hint) + return curseg->segno; + return get_random_u32_inclusive(curseg->segno + 1, + GET_SEG_FROM_SEC(sbi, hint + 1) - 1); + } + return curseg->segno; + } else if (f2fs_need_rand_seg(sbi)) { + return get_random_u32_below(MAIN_SECS(sbi) * SEGS_PER_SEC(sbi)); + } + + /* inmem log may not locate on any segment after mount */ + if (!curseg->inited) + return 0; + + if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) + return 0; + + if (seg_type == CURSEG_HOT_DATA || IS_NODESEG(seg_type)) + return 0; + + if (SIT_I(sbi)->last_victim[ALLOC_NEXT]) + return SIT_I(sbi)->last_victim[ALLOC_NEXT]; + + /* find segments from 0 to reuse freed segments */ + if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_REUSE) + return 0; + + return curseg->segno; +} + +static void reset_curseg_fields(struct curseg_info *curseg) +{ + curseg->inited = false; + curseg->segno = NULL_SEGNO; + curseg->next_segno = 0; } /* * Allocate a current working segment. * This function always allocates a free segment in LFS manner. */ -static void new_curseg(struct f2fs_sb_info *sbi, int type, bool new_sec) +static int new_curseg(struct f2fs_sb_info *sbi, int type, bool new_sec) { struct curseg_info *curseg = CURSEG_I(sbi, type); unsigned int segno = curseg->segno; - int dir = ALLOC_LEFT; - - write_sum_page(sbi, curseg->sum_blk, - GET_SUM_BLOCK(sbi, segno)); - if (type == CURSEG_WARM_DATA || type == CURSEG_COLD_DATA) - dir = ALLOC_RIGHT; - - if (test_opt(sbi, NOHEAP)) - dir = ALLOC_RIGHT; + bool pinning = type == CURSEG_COLD_DATA_PINNED; + int ret; + + if (curseg->inited) + write_sum_page(sbi, curseg->sum_blk, segno); + + segno = __get_next_segno(sbi, type); + ret = get_new_segment(sbi, &segno, new_sec, pinning); + if (ret) { + if (ret == -ENOSPC) + reset_curseg_fields(curseg); + return ret; + } - get_new_segment(sbi, &segno, new_sec, dir); curseg->next_segno = segno; reset_curseg(sbi, type, 1); curseg->alloc_type = LFS; + if (F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_BLK) + curseg->fragment_remained_chunk = + get_random_u32_inclusive(1, sbi->max_fragment_chunk); + return 0; } -static void __next_free_blkoff(struct f2fs_sb_info *sbi, - struct curseg_info *seg, block_t start) +static int __next_free_blkoff(struct f2fs_sb_info *sbi, + int segno, block_t start) { - struct seg_entry *se = get_seg_entry(sbi, seg->segno); - block_t ofs; - for (ofs = start; ofs < sbi->blocks_per_seg; ofs++) { - if (!f2fs_test_bit(ofs, se->ckpt_valid_map) - && !f2fs_test_bit(ofs, se->cur_valid_map)) - break; - } - seg->next_blkoff = ofs; + struct seg_entry *se = get_seg_entry(sbi, segno); + int entries = SIT_VBLOCK_MAP_SIZE / sizeof(unsigned long); + unsigned long *target_map = SIT_I(sbi)->tmp_map; + unsigned long *ckpt_map = (unsigned long *)se->ckpt_valid_map; + unsigned long *cur_map = (unsigned long *)se->cur_valid_map; + int i; + + for (i = 0; i < entries; i++) + target_map[i] = ckpt_map[i] | cur_map[i]; + + return __find_rev_next_zero_bit(target_map, BLKS_PER_SEG(sbi), start); } -/* - * If a segment is written by LFS manner, next block offset is just obtained - * by increasing the current block offset. However, if a segment is written by - * SSR manner, next block offset obtained by calling __next_free_blkoff - */ -static void __refresh_next_blkoff(struct f2fs_sb_info *sbi, - struct curseg_info *seg) +static int f2fs_find_next_ssr_block(struct f2fs_sb_info *sbi, + struct curseg_info *seg) { - if (seg->alloc_type == SSR) - __next_free_blkoff(sbi, seg, seg->next_blkoff + 1); - else - seg->next_blkoff++; + return __next_free_blkoff(sbi, seg->segno, seg->next_blkoff + 1); +} + +bool f2fs_segment_has_free_slot(struct f2fs_sb_info *sbi, int segno) +{ + return __next_free_blkoff(sbi, segno, 0) < BLKS_PER_SEG(sbi); } /* - * This function always allocates a used segment (from dirty seglist) by SSR + * This function always allocates a used segment(from dirty seglist) by SSR * manner, so it should recover the existing segment information of valid blocks */ -static void change_curseg(struct f2fs_sb_info *sbi, int type, bool reuse) +static int change_curseg(struct f2fs_sb_info *sbi, int type) { struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); struct curseg_info *curseg = CURSEG_I(sbi, type); unsigned int new_segno = curseg->next_segno; struct f2fs_summary_block *sum_node; - struct page *sum_page; + struct folio *sum_folio; + + if (curseg->inited) + write_sum_page(sbi, curseg->sum_blk, curseg->segno); - write_sum_page(sbi, curseg->sum_blk, - GET_SUM_BLOCK(sbi, curseg->segno)); __set_test_and_inuse(sbi, new_segno); mutex_lock(&dirty_i->seglist_lock); @@ -506,450 +3073,1216 @@ static void change_curseg(struct f2fs_sb_info *sbi, int type, bool reuse) reset_curseg(sbi, type, 1); curseg->alloc_type = SSR; - __next_free_blkoff(sbi, curseg, 0); + curseg->next_blkoff = __next_free_blkoff(sbi, curseg->segno, 0); - if (reuse) { - sum_page = get_sum_page(sbi, new_segno); - sum_node = (struct f2fs_summary_block *)page_address(sum_page); - memcpy(curseg->sum_blk, sum_node, SUM_ENTRY_SIZE); - f2fs_put_page(sum_page, 1); + sum_folio = f2fs_get_sum_folio(sbi, new_segno); + if (IS_ERR(sum_folio)) { + /* GC won't be able to use stale summary pages by cp_error */ + memset(curseg->sum_blk, 0, SUM_ENTRY_SIZE); + return PTR_ERR(sum_folio); } + sum_node = SUM_BLK_PAGE_ADDR(sum_folio, new_segno); + memcpy(curseg->sum_blk, sum_node, SUM_ENTRY_SIZE); + f2fs_folio_put(sum_folio, true); + return 0; } -static int get_ssr_segment(struct f2fs_sb_info *sbi, int type) +static int get_ssr_segment(struct f2fs_sb_info *sbi, int type, + int alloc_mode, unsigned long long age); + +static int get_atssr_segment(struct f2fs_sb_info *sbi, int type, + int target_type, int alloc_mode, + unsigned long long age) { struct curseg_info *curseg = CURSEG_I(sbi, type); - const struct victim_selection *v_ops = DIRTY_I(sbi)->v_ops; + int ret = 0; - if (IS_NODESEG(type) || !has_not_enough_free_secs(sbi, 0)) - return v_ops->get_victim(sbi, - &(curseg)->next_segno, BG_GC, type, SSR); + curseg->seg_type = target_type; - /* For data segments, let's do SSR more intensively */ - for (; type >= CURSEG_HOT_DATA; type--) - if (v_ops->get_victim(sbi, &(curseg)->next_segno, - BG_GC, type, SSR)) - return 1; - return 0; + if (get_ssr_segment(sbi, type, alloc_mode, age)) { + struct seg_entry *se = get_seg_entry(sbi, curseg->next_segno); + + curseg->seg_type = se->type; + ret = change_curseg(sbi, type); + } else { + /* allocate cold segment by default */ + curseg->seg_type = CURSEG_COLD_DATA; + ret = new_curseg(sbi, type, true); + } + stat_inc_seg_type(sbi, curseg); + return ret; } -/* - * flush out current segment and replace it with new segment - * This function should be returned with success, otherwise BUG - */ -static void allocate_segment_by_default(struct f2fs_sb_info *sbi, - int type, bool force) +static int __f2fs_init_atgc_curseg(struct f2fs_sb_info *sbi, bool force) +{ + struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_ALL_DATA_ATGC); + int ret = 0; + + if (!sbi->am.atgc_enabled && !force) + return 0; + + f2fs_down_read(&SM_I(sbi)->curseg_lock); + + mutex_lock(&curseg->curseg_mutex); + down_write(&SIT_I(sbi)->sentry_lock); + + ret = get_atssr_segment(sbi, CURSEG_ALL_DATA_ATGC, + CURSEG_COLD_DATA, SSR, 0); + + up_write(&SIT_I(sbi)->sentry_lock); + mutex_unlock(&curseg->curseg_mutex); + + f2fs_up_read(&SM_I(sbi)->curseg_lock); + return ret; +} + +int f2fs_init_inmem_curseg(struct f2fs_sb_info *sbi) +{ + return __f2fs_init_atgc_curseg(sbi, false); +} + +int f2fs_reinit_atgc_curseg(struct f2fs_sb_info *sbi) +{ + int ret; + + if (!test_opt(sbi, ATGC)) + return 0; + if (sbi->am.atgc_enabled) + return 0; + if (le64_to_cpu(F2FS_CKPT(sbi)->elapsed_time) < + sbi->am.age_threshold) + return 0; + + ret = __f2fs_init_atgc_curseg(sbi, true); + if (!ret) { + sbi->am.atgc_enabled = true; + f2fs_info(sbi, "reenabled age threshold GC"); + } + return ret; +} + +static void __f2fs_save_inmem_curseg(struct f2fs_sb_info *sbi, int type) { struct curseg_info *curseg = CURSEG_I(sbi, type); - if (force) { - new_curseg(sbi, type, true); + mutex_lock(&curseg->curseg_mutex); + if (!curseg->inited) goto out; + + if (get_valid_blocks(sbi, curseg->segno, false)) { + write_sum_page(sbi, curseg->sum_blk, curseg->segno); + } else { + mutex_lock(&DIRTY_I(sbi)->seglist_lock); + __set_test_and_free(sbi, curseg->segno, true); + mutex_unlock(&DIRTY_I(sbi)->seglist_lock); } +out: + mutex_unlock(&curseg->curseg_mutex); +} - if (type == CURSEG_WARM_NODE) - new_curseg(sbi, type, false); - else if (curseg->alloc_type == LFS && is_next_segment_free(sbi, type)) - new_curseg(sbi, type, false); - else if (need_SSR(sbi) && get_ssr_segment(sbi, type)) - change_curseg(sbi, type, true); - else - new_curseg(sbi, type, false); +void f2fs_save_inmem_curseg(struct f2fs_sb_info *sbi) +{ + __f2fs_save_inmem_curseg(sbi, CURSEG_COLD_DATA_PINNED); + + if (sbi->am.atgc_enabled) + __f2fs_save_inmem_curseg(sbi, CURSEG_ALL_DATA_ATGC); +} + +static void __f2fs_restore_inmem_curseg(struct f2fs_sb_info *sbi, int type) +{ + struct curseg_info *curseg = CURSEG_I(sbi, type); + + mutex_lock(&curseg->curseg_mutex); + if (!curseg->inited) + goto out; + if (get_valid_blocks(sbi, curseg->segno, false)) + goto out; + + mutex_lock(&DIRTY_I(sbi)->seglist_lock); + __set_test_and_inuse(sbi, curseg->segno); + mutex_unlock(&DIRTY_I(sbi)->seglist_lock); out: -#ifdef CONFIG_F2FS_STAT_FS - sbi->segment_count[curseg->alloc_type]++; -#endif - return; + mutex_unlock(&curseg->curseg_mutex); } -void allocate_new_segments(struct f2fs_sb_info *sbi) +void f2fs_restore_inmem_curseg(struct f2fs_sb_info *sbi) { - struct curseg_info *curseg; - unsigned int old_curseg; - int i; + __f2fs_restore_inmem_curseg(sbi, CURSEG_COLD_DATA_PINNED); - for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) { - curseg = CURSEG_I(sbi, i); - old_curseg = curseg->segno; - SIT_I(sbi)->s_ops->allocate_segment(sbi, i, true); - locate_dirty_segment(sbi, old_curseg); + if (sbi->am.atgc_enabled) + __f2fs_restore_inmem_curseg(sbi, CURSEG_ALL_DATA_ATGC); +} + +static int get_ssr_segment(struct f2fs_sb_info *sbi, int type, + int alloc_mode, unsigned long long age) +{ + struct curseg_info *curseg = CURSEG_I(sbi, type); + unsigned segno = NULL_SEGNO; + unsigned short seg_type = curseg->seg_type; + int i, cnt; + bool reversed = false; + + sanity_check_seg_type(sbi, seg_type); + + /* f2fs_need_SSR() already forces to do this */ + if (!f2fs_get_victim(sbi, &segno, BG_GC, seg_type, + alloc_mode, age, false)) { + curseg->next_segno = segno; + return 1; } + + /* For node segments, let's do SSR more intensively */ + if (IS_NODESEG(seg_type)) { + if (seg_type >= CURSEG_WARM_NODE) { + reversed = true; + i = CURSEG_COLD_NODE; + } else { + i = CURSEG_HOT_NODE; + } + cnt = NR_CURSEG_NODE_TYPE; + } else { + if (seg_type >= CURSEG_WARM_DATA) { + reversed = true; + i = CURSEG_COLD_DATA; + } else { + i = CURSEG_HOT_DATA; + } + cnt = NR_CURSEG_DATA_TYPE; + } + + for (; cnt-- > 0; reversed ? i-- : i++) { + if (i == seg_type) + continue; + if (!f2fs_get_victim(sbi, &segno, BG_GC, i, + alloc_mode, age, false)) { + curseg->next_segno = segno; + return 1; + } + } + + /* find valid_blocks=0 in dirty list */ + if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) { + segno = get_free_segment(sbi); + if (segno != NULL_SEGNO) { + curseg->next_segno = segno; + return 1; + } + } + return 0; } -static const struct segment_allocation default_salloc_ops = { - .allocate_segment = allocate_segment_by_default, -}; +static bool need_new_seg(struct f2fs_sb_info *sbi, int type) +{ + struct curseg_info *curseg = CURSEG_I(sbi, type); + + if (!is_set_ckpt_flags(sbi, CP_CRC_RECOVERY_FLAG) && + curseg->seg_type == CURSEG_WARM_NODE) + return true; + if (curseg->alloc_type == LFS && is_next_segment_free(sbi, curseg) && + likely(!is_sbi_flag_set(sbi, SBI_CP_DISABLED))) + return true; + if (!f2fs_need_SSR(sbi) || !get_ssr_segment(sbi, type, SSR, 0)) + return true; + return false; +} + +int f2fs_allocate_segment_for_resize(struct f2fs_sb_info *sbi, int type, + unsigned int start, unsigned int end) +{ + struct curseg_info *curseg = CURSEG_I(sbi, type); + unsigned int segno; + int ret = 0; + + f2fs_down_read(&SM_I(sbi)->curseg_lock); + mutex_lock(&curseg->curseg_mutex); + down_write(&SIT_I(sbi)->sentry_lock); + + segno = CURSEG_I(sbi, type)->segno; + if (segno < start || segno > end) + goto unlock; + + if (f2fs_need_SSR(sbi) && get_ssr_segment(sbi, type, SSR, 0)) + ret = change_curseg(sbi, type); + else + ret = new_curseg(sbi, type, true); + + stat_inc_seg_type(sbi, curseg); + + locate_dirty_segment(sbi, segno); +unlock: + up_write(&SIT_I(sbi)->sentry_lock); + + if (segno != curseg->segno) + f2fs_notice(sbi, "For resize: curseg of type %d: %u ==> %u", + type, segno, curseg->segno); + + mutex_unlock(&curseg->curseg_mutex); + f2fs_up_read(&SM_I(sbi)->curseg_lock); + return ret; +} -static void f2fs_end_io_write(struct bio *bio, int err) +static int __allocate_new_segment(struct f2fs_sb_info *sbi, int type, + bool new_sec, bool force) { - const int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags); - struct bio_vec *bvec = bio->bi_io_vec + bio->bi_vcnt - 1; - struct bio_private *p = bio->bi_private; + struct curseg_info *curseg = CURSEG_I(sbi, type); + unsigned int old_segno; + int err = 0; - do { - struct page *page = bvec->bv_page; - - if (--bvec >= bio->bi_io_vec) - prefetchw(&bvec->bv_page->flags); - if (!uptodate) { - SetPageError(page); - if (page->mapping) - set_bit(AS_EIO, &page->mapping->flags); - set_ckpt_flags(p->sbi->ckpt, CP_ERROR_FLAG); - p->sbi->sb->s_flags |= MS_RDONLY; - } - end_page_writeback(page); - dec_page_count(p->sbi, F2FS_WRITEBACK); - } while (bvec >= bio->bi_io_vec); - - if (p->is_sync) - complete(p->wait); - kfree(p); - bio_put(bio); + if (type == CURSEG_COLD_DATA_PINNED && !curseg->inited) + goto allocate; + + if (!force && curseg->inited && + !curseg->next_blkoff && + !get_valid_blocks(sbi, curseg->segno, new_sec) && + !get_ckpt_valid_blocks(sbi, curseg->segno, new_sec)) + return 0; + +allocate: + old_segno = curseg->segno; + err = new_curseg(sbi, type, true); + if (err) + return err; + stat_inc_seg_type(sbi, curseg); + locate_dirty_segment(sbi, old_segno); + return 0; +} + +int f2fs_allocate_new_section(struct f2fs_sb_info *sbi, int type, bool force) +{ + int ret; + + f2fs_down_read(&SM_I(sbi)->curseg_lock); + down_write(&SIT_I(sbi)->sentry_lock); + ret = __allocate_new_segment(sbi, type, true, force); + up_write(&SIT_I(sbi)->sentry_lock); + f2fs_up_read(&SM_I(sbi)->curseg_lock); + + return ret; } -struct bio *f2fs_bio_alloc(struct block_device *bdev, int npages) +int f2fs_allocate_pinning_section(struct f2fs_sb_info *sbi) { - struct bio *bio; - struct bio_private *priv; + int err; + bool gc_required = true; + retry: - priv = kmalloc(sizeof(struct bio_private), GFP_NOFS); - if (!priv) { - cond_resched(); - goto retry; + f2fs_lock_op(sbi); + err = f2fs_allocate_new_section(sbi, CURSEG_COLD_DATA_PINNED, false); + f2fs_unlock_op(sbi); + + if (f2fs_sb_has_blkzoned(sbi) && err == -EAGAIN && gc_required) { + f2fs_down_write(&sbi->gc_lock); + err = f2fs_gc_range(sbi, 0, sbi->first_seq_zone_segno - 1, + true, ZONED_PIN_SEC_REQUIRED_COUNT); + f2fs_up_write(&sbi->gc_lock); + + gc_required = false; + if (!err) + goto retry; } - /* No failure on bio allocation */ - bio = bio_alloc(GFP_NOIO, npages); - bio->bi_bdev = bdev; - bio->bi_private = priv; - return bio; + return err; } -static void do_submit_bio(struct f2fs_sb_info *sbi, - enum page_type type, bool sync) +int f2fs_allocate_new_segments(struct f2fs_sb_info *sbi) { - int rw = sync ? WRITE_SYNC : WRITE; - enum page_type btype = type > META ? META : type; - - if (type >= META_FLUSH) - rw = WRITE_FLUSH_FUA; + int i; + int err = 0; - if (btype == META) - rw |= REQ_META; + f2fs_down_read(&SM_I(sbi)->curseg_lock); + down_write(&SIT_I(sbi)->sentry_lock); + for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) + err += __allocate_new_segment(sbi, i, false, false); + up_write(&SIT_I(sbi)->sentry_lock); + f2fs_up_read(&SM_I(sbi)->curseg_lock); - if (sbi->bio[btype]) { - struct bio_private *p = sbi->bio[btype]->bi_private; - p->sbi = sbi; - sbi->bio[btype]->bi_end_io = f2fs_end_io_write; + return err; +} - trace_f2fs_do_submit_bio(sbi->sb, btype, sync, sbi->bio[btype]); +bool f2fs_exist_trim_candidates(struct f2fs_sb_info *sbi, + struct cp_control *cpc) +{ + __u64 trim_start = cpc->trim_start; + bool has_candidate = false; - if (type == META_FLUSH) { - DECLARE_COMPLETION_ONSTACK(wait); - p->is_sync = true; - p->wait = &wait; - submit_bio(rw, sbi->bio[btype]); - wait_for_completion(&wait); - } else { - p->is_sync = false; - submit_bio(rw, sbi->bio[btype]); + down_write(&SIT_I(sbi)->sentry_lock); + for (; cpc->trim_start <= cpc->trim_end; cpc->trim_start++) { + if (add_discard_addrs(sbi, cpc, true)) { + has_candidate = true; + break; } - sbi->bio[btype] = NULL; } -} + up_write(&SIT_I(sbi)->sentry_lock); -void f2fs_submit_bio(struct f2fs_sb_info *sbi, enum page_type type, bool sync) -{ - down_write(&sbi->bio_sem); - do_submit_bio(sbi, type, sync); - up_write(&sbi->bio_sem); + cpc->trim_start = trim_start; + return has_candidate; } -static void submit_write_page(struct f2fs_sb_info *sbi, struct page *page, - block_t blk_addr, enum page_type type) +static unsigned int __issue_discard_cmd_range(struct f2fs_sb_info *sbi, + struct discard_policy *dpolicy, + unsigned int start, unsigned int end) { - struct block_device *bdev = sbi->sb->s_bdev; + struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info; + struct discard_cmd *prev_dc = NULL, *next_dc = NULL; + struct rb_node **insert_p = NULL, *insert_parent = NULL; + struct discard_cmd *dc; + struct blk_plug plug; + int issued; + unsigned int trimmed = 0; + +next: + issued = 0; + + mutex_lock(&dcc->cmd_lock); + if (unlikely(dcc->rbtree_check)) + f2fs_bug_on(sbi, !f2fs_check_discard_tree(sbi)); + + dc = __lookup_discard_cmd_ret(&dcc->root, start, + &prev_dc, &next_dc, &insert_p, &insert_parent); + if (!dc) + dc = next_dc; + + blk_start_plug(&plug); + + while (dc && dc->di.lstart <= end) { + struct rb_node *node; + int err = 0; + + if (dc->di.len < dpolicy->granularity) + goto skip; + + if (dc->state != D_PREP) { + list_move_tail(&dc->list, &dcc->fstrim_list); + goto skip; + } - verify_block_addr(sbi, blk_addr); + err = __submit_discard_cmd(sbi, dpolicy, dc, &issued); - down_write(&sbi->bio_sem); + if (issued >= dpolicy->max_requests) { + start = dc->di.lstart + dc->di.len; - inc_page_count(sbi, F2FS_WRITEBACK); + if (err) + __remove_discard_cmd(sbi, dc); - if (sbi->bio[type] && sbi->last_block_in_bio[type] != blk_addr - 1) - do_submit_bio(sbi, type, false); -alloc_new: - if (sbi->bio[type] == NULL) { - sbi->bio[type] = f2fs_bio_alloc(bdev, max_hw_blocks(sbi)); - sbi->bio[type]->bi_sector = SECTOR_FROM_BLOCK(sbi, blk_addr); - /* - * The end_io will be assigned at the sumbission phase. - * Until then, let bio_add_page() merge consecutive IOs as much - * as possible. - */ + blk_finish_plug(&plug); + mutex_unlock(&dcc->cmd_lock); + trimmed += __wait_all_discard_cmd(sbi, NULL); + f2fs_schedule_timeout(DEFAULT_DISCARD_INTERVAL); + goto next; + } +skip: + node = rb_next(&dc->rb_node); + if (err) + __remove_discard_cmd(sbi, dc); + dc = rb_entry_safe(node, struct discard_cmd, rb_node); + + if (fatal_signal_pending(current)) + break; } - if (bio_add_page(sbi->bio[type], page, PAGE_CACHE_SIZE, 0) < - PAGE_CACHE_SIZE) { - do_submit_bio(sbi, type, false); - goto alloc_new; + blk_finish_plug(&plug); + mutex_unlock(&dcc->cmd_lock); + + return trimmed; +} + +int f2fs_trim_fs(struct f2fs_sb_info *sbi, struct fstrim_range *range) +{ + __u64 start = F2FS_BYTES_TO_BLK(range->start); + __u64 end = start + F2FS_BYTES_TO_BLK(range->len) - 1; + unsigned int start_segno, end_segno; + block_t start_block, end_block; + struct cp_control cpc; + struct discard_policy dpolicy; + unsigned long long trimmed = 0; + int err = 0; + bool need_align = f2fs_lfs_mode(sbi) && __is_large_section(sbi); + + if (start >= MAX_BLKADDR(sbi) || range->len < sbi->blocksize) + return -EINVAL; + + if (end < MAIN_BLKADDR(sbi)) + goto out; + + if (is_sbi_flag_set(sbi, SBI_NEED_FSCK)) { + f2fs_warn(sbi, "Found FS corruption, run fsck to fix."); + return -EFSCORRUPTED; + } + + /* start/end segment number in main_area */ + start_segno = (start <= MAIN_BLKADDR(sbi)) ? 0 : GET_SEGNO(sbi, start); + end_segno = (end >= MAX_BLKADDR(sbi)) ? MAIN_SEGS(sbi) - 1 : + GET_SEGNO(sbi, end); + if (need_align) { + start_segno = rounddown(start_segno, SEGS_PER_SEC(sbi)); + end_segno = roundup(end_segno + 1, SEGS_PER_SEC(sbi)) - 1; } - sbi->last_block_in_bio[type] = blk_addr; + cpc.reason = CP_DISCARD; + cpc.trim_minlen = max_t(__u64, 1, F2FS_BYTES_TO_BLK(range->minlen)); + cpc.trim_start = start_segno; + cpc.trim_end = end_segno; + + if (sbi->discard_blks == 0) + goto out; + + f2fs_down_write(&sbi->gc_lock); + stat_inc_cp_call_count(sbi, TOTAL_CALL); + err = f2fs_write_checkpoint(sbi, &cpc); + f2fs_up_write(&sbi->gc_lock); + if (err) + goto out; + + /* + * We filed discard candidates, but actually we don't need to wait for + * all of them, since they'll be issued in idle time along with runtime + * discard option. User configuration looks like using runtime discard + * or periodic fstrim instead of it. + */ + if (f2fs_realtime_discard_enable(sbi)) + goto out; + + start_block = START_BLOCK(sbi, start_segno); + end_block = START_BLOCK(sbi, end_segno + 1); + + __init_discard_policy(sbi, &dpolicy, DPOLICY_FSTRIM, cpc.trim_minlen); + trimmed = __issue_discard_cmd_range(sbi, &dpolicy, + start_block, end_block); - up_write(&sbi->bio_sem); - trace_f2fs_submit_write_page(page, blk_addr, type); + trimmed += __wait_discard_cmd_range(sbi, &dpolicy, + start_block, end_block); +out: + if (!err) + range->len = F2FS_BLK_TO_BYTES(trimmed); + return err; } -static bool __has_curseg_space(struct f2fs_sb_info *sbi, int type) +int f2fs_rw_hint_to_seg_type(struct f2fs_sb_info *sbi, enum rw_hint hint) { - struct curseg_info *curseg = CURSEG_I(sbi, type); - if (curseg->next_blkoff < sbi->blocks_per_seg) - return true; - return false; + if (F2FS_OPTION(sbi).active_logs == 2) + return CURSEG_HOT_DATA; + else if (F2FS_OPTION(sbi).active_logs == 4) + return CURSEG_COLD_DATA; + + /* active_log == 6 */ + switch (hint) { + case WRITE_LIFE_SHORT: + return CURSEG_HOT_DATA; + case WRITE_LIFE_EXTREME: + return CURSEG_COLD_DATA; + default: + return CURSEG_WARM_DATA; + } +} + +/* + * This returns write hints for each segment type. This hints will be + * passed down to block layer as below by default. + * + * User F2FS Block + * ---- ---- ----- + * META WRITE_LIFE_NONE|REQ_META + * HOT_NODE WRITE_LIFE_NONE + * WARM_NODE WRITE_LIFE_MEDIUM + * COLD_NODE WRITE_LIFE_LONG + * ioctl(COLD) COLD_DATA WRITE_LIFE_EXTREME + * extension list " " + * + * -- buffered io + * COLD_DATA WRITE_LIFE_EXTREME + * HOT_DATA WRITE_LIFE_SHORT + * WARM_DATA WRITE_LIFE_NOT_SET + * + * -- direct io + * WRITE_LIFE_EXTREME COLD_DATA WRITE_LIFE_EXTREME + * WRITE_LIFE_SHORT HOT_DATA WRITE_LIFE_SHORT + * WRITE_LIFE_NOT_SET WARM_DATA WRITE_LIFE_NOT_SET + * WRITE_LIFE_NONE " WRITE_LIFE_NONE + * WRITE_LIFE_MEDIUM " WRITE_LIFE_MEDIUM + * WRITE_LIFE_LONG " WRITE_LIFE_LONG + */ +enum rw_hint f2fs_io_type_to_rw_hint(struct f2fs_sb_info *sbi, + enum page_type type, enum temp_type temp) +{ + switch (type) { + case DATA: + switch (temp) { + case WARM: + return WRITE_LIFE_NOT_SET; + case HOT: + return WRITE_LIFE_SHORT; + case COLD: + return WRITE_LIFE_EXTREME; + default: + return WRITE_LIFE_NONE; + } + case NODE: + switch (temp) { + case WARM: + return WRITE_LIFE_MEDIUM; + case HOT: + return WRITE_LIFE_NONE; + case COLD: + return WRITE_LIFE_LONG; + default: + return WRITE_LIFE_NONE; + } + case META: + return WRITE_LIFE_NONE; + default: + return WRITE_LIFE_NONE; + } } -static int __get_segment_type_2(struct page *page, enum page_type p_type) +static int __get_segment_type_2(struct f2fs_io_info *fio) { - if (p_type == DATA) + if (fio->type == DATA) return CURSEG_HOT_DATA; else return CURSEG_HOT_NODE; } -static int __get_segment_type_4(struct page *page, enum page_type p_type) +static int __get_segment_type_4(struct f2fs_io_info *fio) { - if (p_type == DATA) { - struct inode *inode = page->mapping->host; + if (fio->type == DATA) { + struct inode *inode = fio_inode(fio); if (S_ISDIR(inode->i_mode)) return CURSEG_HOT_DATA; else return CURSEG_COLD_DATA; } else { - if (IS_DNODE(page) && !is_cold_node(page)) - return CURSEG_HOT_NODE; + if (IS_DNODE(fio->folio) && is_cold_node(fio->folio)) + return CURSEG_WARM_NODE; else return CURSEG_COLD_NODE; } } -static int __get_segment_type_6(struct page *page, enum page_type p_type) +static int __get_age_segment_type(struct inode *inode, pgoff_t pgofs) { - if (p_type == DATA) { - struct inode *inode = page->mapping->host; + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); + struct extent_info ei = {}; - if (S_ISDIR(inode->i_mode)) + if (f2fs_lookup_age_extent_cache(inode, pgofs, &ei)) { + if (!ei.age) + return NO_CHECK_TYPE; + if (ei.age <= sbi->hot_data_age_threshold) return CURSEG_HOT_DATA; - else if (is_cold_data(page) || file_is_cold(inode)) - return CURSEG_COLD_DATA; - else + if (ei.age <= sbi->warm_data_age_threshold) return CURSEG_WARM_DATA; + return CURSEG_COLD_DATA; + } + return NO_CHECK_TYPE; +} + +static int __get_segment_type_6(struct f2fs_io_info *fio) +{ + if (fio->type == DATA) { + struct inode *inode = fio_inode(fio); + int type; + + if (is_inode_flag_set(inode, FI_ALIGNED_WRITE)) + return CURSEG_COLD_DATA_PINNED; + + if (page_private_gcing(fio->page)) { + if (fio->sbi->am.atgc_enabled && + (fio->io_type == FS_DATA_IO) && + (fio->sbi->gc_mode != GC_URGENT_HIGH) && + __is_valid_data_blkaddr(fio->old_blkaddr) && + !is_inode_flag_set(inode, FI_OPU_WRITE)) + return CURSEG_ALL_DATA_ATGC; + else + return CURSEG_COLD_DATA; + } + if (file_is_cold(inode) || f2fs_need_compress_data(inode)) + return CURSEG_COLD_DATA; + + type = __get_age_segment_type(inode, fio->folio->index); + if (type != NO_CHECK_TYPE) + return type; + + if (file_is_hot(inode) || + is_inode_flag_set(inode, FI_HOT_DATA) || + f2fs_is_cow_file(inode) || + is_inode_flag_set(inode, FI_NEED_IPU)) + return CURSEG_HOT_DATA; + return f2fs_rw_hint_to_seg_type(F2FS_I_SB(inode), + inode->i_write_hint); } else { - if (IS_DNODE(page)) - return is_cold_node(page) ? CURSEG_WARM_NODE : + if (IS_DNODE(fio->folio)) + return is_cold_node(fio->folio) ? CURSEG_WARM_NODE : CURSEG_HOT_NODE; - else - return CURSEG_COLD_NODE; + return CURSEG_COLD_NODE; } } -static int __get_segment_type(struct page *page, enum page_type p_type) +enum temp_type f2fs_get_segment_temp(struct f2fs_sb_info *sbi, + enum log_type type) { - struct f2fs_sb_info *sbi = F2FS_SB(page->mapping->host->i_sb); - switch (sbi->active_logs) { + struct curseg_info *curseg = CURSEG_I(sbi, type); + enum temp_type temp = COLD; + + switch (curseg->seg_type) { + case CURSEG_HOT_NODE: + case CURSEG_HOT_DATA: + temp = HOT; + break; + case CURSEG_WARM_NODE: + case CURSEG_WARM_DATA: + temp = WARM; + break; + case CURSEG_COLD_NODE: + case CURSEG_COLD_DATA: + temp = COLD; + break; + default: + f2fs_bug_on(sbi, 1); + } + + return temp; +} + +static int __get_segment_type(struct f2fs_io_info *fio) +{ + enum log_type type = CURSEG_HOT_DATA; + + switch (F2FS_OPTION(fio->sbi).active_logs) { case 2: - return __get_segment_type_2(page, p_type); + type = __get_segment_type_2(fio); + break; case 4: - return __get_segment_type_4(page, p_type); + type = __get_segment_type_4(fio); + break; + case 6: + type = __get_segment_type_6(fio); + break; + default: + f2fs_bug_on(fio->sbi, true); } - /* NR_CURSEG_TYPE(6) logs by default */ - BUG_ON(sbi->active_logs != NR_CURSEG_TYPE); - return __get_segment_type_6(page, p_type); + + fio->temp = f2fs_get_segment_temp(fio->sbi, type); + + return type; +} + +static void f2fs_randomize_chunk(struct f2fs_sb_info *sbi, + struct curseg_info *seg) +{ + /* To allocate block chunks in different sizes, use random number */ + if (--seg->fragment_remained_chunk > 0) + return; + + seg->fragment_remained_chunk = + get_random_u32_inclusive(1, sbi->max_fragment_chunk); + seg->next_blkoff += + get_random_u32_inclusive(1, sbi->max_fragment_hole); } -static void do_write_page(struct f2fs_sb_info *sbi, struct page *page, - block_t old_blkaddr, block_t *new_blkaddr, - struct f2fs_summary *sum, enum page_type p_type) +int f2fs_allocate_data_block(struct f2fs_sb_info *sbi, struct folio *folio, + block_t old_blkaddr, block_t *new_blkaddr, + struct f2fs_summary *sum, int type, + struct f2fs_io_info *fio) { struct sit_info *sit_i = SIT_I(sbi); - struct curseg_info *curseg; - unsigned int old_cursegno; - int type; + struct curseg_info *curseg = CURSEG_I(sbi, type); + unsigned long long old_mtime; + bool from_gc = (type == CURSEG_ALL_DATA_ATGC); + struct seg_entry *se = NULL; + bool segment_full = false; + int ret = 0; - type = __get_segment_type(page, p_type); - curseg = CURSEG_I(sbi, type); + f2fs_down_read(&SM_I(sbi)->curseg_lock); mutex_lock(&curseg->curseg_mutex); + down_write(&sit_i->sentry_lock); + if (curseg->segno == NULL_SEGNO) { + ret = -ENOSPC; + goto out_err; + } + + if (from_gc) { + f2fs_bug_on(sbi, GET_SEGNO(sbi, old_blkaddr) == NULL_SEGNO); + se = get_seg_entry(sbi, GET_SEGNO(sbi, old_blkaddr)); + sanity_check_seg_type(sbi, se->type); + f2fs_bug_on(sbi, IS_NODESEG(se->type)); + } *new_blkaddr = NEXT_FREE_BLKADDR(sbi, curseg); - old_cursegno = curseg->segno; - /* - * __add_sum_entry should be resided under the curseg_mutex - * because, this function updates a summary entry in the - * current summary block. - */ - __add_sum_entry(sbi, type, sum); + f2fs_bug_on(sbi, curseg->next_blkoff >= BLKS_PER_SEG(sbi)); - mutex_lock(&sit_i->sentry_lock); - __refresh_next_blkoff(sbi, curseg); -#ifdef CONFIG_F2FS_STAT_FS - sbi->block_count[curseg->alloc_type]++; -#endif + f2fs_wait_discard_bio(sbi, *new_blkaddr); + + curseg->sum_blk->entries[curseg->next_blkoff] = *sum; + if (curseg->alloc_type == SSR) { + curseg->next_blkoff = f2fs_find_next_ssr_block(sbi, curseg); + } else { + curseg->next_blkoff++; + if (F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_BLK) + f2fs_randomize_chunk(sbi, curseg); + } + if (curseg->next_blkoff >= f2fs_usable_blks_in_seg(sbi, curseg->segno)) + segment_full = true; + stat_inc_block_count(sbi, curseg); + + if (from_gc) { + old_mtime = get_segment_mtime(sbi, old_blkaddr); + } else { + update_segment_mtime(sbi, old_blkaddr, 0); + old_mtime = 0; + } + update_segment_mtime(sbi, *new_blkaddr, old_mtime); /* * SIT information should be updated before segment allocation, * since SSR needs latest valid block information. */ - refresh_sit_entry(sbi, old_blkaddr, *new_blkaddr); + update_sit_entry(sbi, *new_blkaddr, 1); + update_sit_entry(sbi, old_blkaddr, -1); - if (!__has_curseg_space(sbi, type)) - sit_i->s_ops->allocate_segment(sbi, type, false); + /* + * If the current segment is full, flush it out and replace it with a + * new segment. + */ + if (segment_full) { + if (type == CURSEG_COLD_DATA_PINNED && + !((curseg->segno + 1) % sbi->segs_per_sec)) { + write_sum_page(sbi, curseg->sum_blk, curseg->segno); + reset_curseg_fields(curseg); + goto skip_new_segment; + } - locate_dirty_segment(sbi, old_cursegno); + if (from_gc) { + ret = get_atssr_segment(sbi, type, se->type, + AT_SSR, se->mtime); + } else { + if (need_new_seg(sbi, type)) + ret = new_curseg(sbi, type, false); + else + ret = change_curseg(sbi, type); + stat_inc_seg_type(sbi, curseg); + } + + if (ret) + goto out_err; + } + +skip_new_segment: + /* + * segment dirty status should be updated after segment allocation, + * so we just need to update status only one time after previous + * segment being closed. + */ locate_dirty_segment(sbi, GET_SEGNO(sbi, old_blkaddr)); - mutex_unlock(&sit_i->sentry_lock); + locate_dirty_segment(sbi, GET_SEGNO(sbi, *new_blkaddr)); - if (p_type == NODE) - fill_node_footer_blkaddr(page, NEXT_FREE_BLKADDR(sbi, curseg)); + if (IS_DATASEG(curseg->seg_type)) { + unsigned long long new_val; - /* writeout dirty page into bdev */ - submit_write_page(sbi, page, *new_blkaddr, p_type); + new_val = atomic64_inc_return(&sbi->allocated_data_blocks); + if (unlikely(new_val == ULLONG_MAX)) + atomic64_set(&sbi->allocated_data_blocks, 0); + } + up_write(&sit_i->sentry_lock); + + if (folio && IS_NODESEG(curseg->seg_type)) { + fill_node_footer_blkaddr(folio, NEXT_FREE_BLKADDR(sbi, curseg)); + + f2fs_inode_chksum_set(sbi, folio); + } + + if (fio) { + struct f2fs_bio_info *io; + + INIT_LIST_HEAD(&fio->list); + fio->in_list = 1; + io = sbi->write_io[fio->type] + fio->temp; + spin_lock(&io->io_lock); + list_add_tail(&fio->list, &io->io_list); + spin_unlock(&io->io_lock); + } + + mutex_unlock(&curseg->curseg_mutex); + f2fs_up_read(&SM_I(sbi)->curseg_lock); + return 0; + +out_err: + *new_blkaddr = NULL_ADDR; + up_write(&sit_i->sentry_lock); mutex_unlock(&curseg->curseg_mutex); + f2fs_up_read(&SM_I(sbi)->curseg_lock); + return ret; } -void write_meta_page(struct f2fs_sb_info *sbi, struct page *page) +void f2fs_update_device_state(struct f2fs_sb_info *sbi, nid_t ino, + block_t blkaddr, unsigned int blkcnt) { - set_page_writeback(page); - submit_write_page(sbi, page, page->index, META); + if (!f2fs_is_multi_device(sbi)) + return; + + while (1) { + unsigned int devidx = f2fs_target_device_index(sbi, blkaddr); + unsigned int blks = FDEV(devidx).end_blk - blkaddr + 1; + + /* update device state for fsync */ + f2fs_set_dirty_device(sbi, ino, devidx, FLUSH_INO); + + /* update device state for checkpoint */ + if (!f2fs_test_bit(devidx, (char *)&sbi->dirty_device)) { + spin_lock(&sbi->dev_lock); + f2fs_set_bit(devidx, (char *)&sbi->dirty_device); + spin_unlock(&sbi->dev_lock); + } + + if (blkcnt <= blks) + break; + blkcnt -= blks; + blkaddr += blks; + } } -void write_node_page(struct f2fs_sb_info *sbi, struct page *page, - unsigned int nid, block_t old_blkaddr, block_t *new_blkaddr) +static int log_type_to_seg_type(enum log_type type) +{ + int seg_type = CURSEG_COLD_DATA; + + switch (type) { + case CURSEG_HOT_DATA: + case CURSEG_WARM_DATA: + case CURSEG_COLD_DATA: + case CURSEG_HOT_NODE: + case CURSEG_WARM_NODE: + case CURSEG_COLD_NODE: + seg_type = (int)type; + break; + case CURSEG_COLD_DATA_PINNED: + case CURSEG_ALL_DATA_ATGC: + seg_type = CURSEG_COLD_DATA; + break; + default: + break; + } + return seg_type; +} + +static void do_write_page(struct f2fs_summary *sum, struct f2fs_io_info *fio) +{ + struct folio *folio = fio->folio; + enum log_type type = __get_segment_type(fio); + int seg_type = log_type_to_seg_type(type); + bool keep_order = (f2fs_lfs_mode(fio->sbi) && + seg_type == CURSEG_COLD_DATA); + int err; + + if (keep_order) + f2fs_down_read(&fio->sbi->io_order_lock); + + err = f2fs_allocate_data_block(fio->sbi, folio, fio->old_blkaddr, + &fio->new_blkaddr, sum, type, fio); + if (unlikely(err)) { + f2fs_err_ratelimited(fio->sbi, + "%s Failed to allocate data block, ino:%u, index:%lu, type:%d, old_blkaddr:0x%x, new_blkaddr:0x%x, err:%d", + __func__, fio->ino, folio->index, type, + fio->old_blkaddr, fio->new_blkaddr, err); + if (fscrypt_inode_uses_fs_layer_crypto(folio->mapping->host)) + fscrypt_finalize_bounce_page(&fio->encrypted_page); + folio_end_writeback(folio); + if (f2fs_in_warm_node_list(fio->sbi, folio)) + f2fs_del_fsync_node_entry(fio->sbi, folio); + f2fs_bug_on(fio->sbi, !is_set_ckpt_flags(fio->sbi, + CP_ERROR_FLAG)); + goto out; + } + + f2fs_bug_on(fio->sbi, !f2fs_is_valid_blkaddr_raw(fio->sbi, + fio->new_blkaddr, DATA_GENERIC_ENHANCE)); + + if (GET_SEGNO(fio->sbi, fio->old_blkaddr) != NULL_SEGNO) + f2fs_invalidate_internal_cache(fio->sbi, fio->old_blkaddr, 1); + + /* writeout dirty page into bdev */ + f2fs_submit_page_write(fio); + + f2fs_update_device_state(fio->sbi, fio->ino, fio->new_blkaddr, 1); +out: + if (keep_order) + f2fs_up_read(&fio->sbi->io_order_lock); +} + +void f2fs_do_write_meta_page(struct f2fs_sb_info *sbi, struct folio *folio, + enum iostat_type io_type) +{ + struct f2fs_io_info fio = { + .sbi = sbi, + .type = META, + .temp = HOT, + .op = REQ_OP_WRITE, + .op_flags = REQ_SYNC | REQ_META | REQ_PRIO, + .old_blkaddr = folio->index, + .new_blkaddr = folio->index, + .folio = folio, + .encrypted_page = NULL, + .in_list = 0, + }; + + if (unlikely(folio->index >= MAIN_BLKADDR(sbi))) + fio.op_flags &= ~REQ_META; + + folio_start_writeback(folio); + f2fs_submit_page_write(&fio); + + stat_inc_meta_count(sbi, folio->index); + f2fs_update_iostat(sbi, NULL, io_type, F2FS_BLKSIZE); +} + +void f2fs_do_write_node_page(unsigned int nid, struct f2fs_io_info *fio) { struct f2fs_summary sum; + set_summary(&sum, nid, 0, 0); - do_write_page(sbi, page, old_blkaddr, new_blkaddr, &sum, NODE); + do_write_page(&sum, fio); + + f2fs_update_iostat(fio->sbi, NULL, fio->io_type, F2FS_BLKSIZE); } -void write_data_page(struct inode *inode, struct page *page, - struct dnode_of_data *dn, block_t old_blkaddr, - block_t *new_blkaddr) +void f2fs_outplace_write_data(struct dnode_of_data *dn, + struct f2fs_io_info *fio) { - struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); + struct f2fs_sb_info *sbi = fio->sbi; struct f2fs_summary sum; - struct node_info ni; - BUG_ON(old_blkaddr == NULL_ADDR); - get_node_info(sbi, dn->nid, &ni); - set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version); + f2fs_bug_on(sbi, dn->data_blkaddr == NULL_ADDR); + if (fio->io_type == FS_DATA_IO || fio->io_type == FS_CP_DATA_IO) + f2fs_update_age_extent_cache(dn); + set_summary(&sum, dn->nid, dn->ofs_in_node, fio->version); + do_write_page(&sum, fio); + f2fs_update_data_blkaddr(dn, fio->new_blkaddr); + + f2fs_update_iostat(sbi, dn->inode, fio->io_type, F2FS_BLKSIZE); +} + +int f2fs_inplace_write_data(struct f2fs_io_info *fio) +{ + int err; + struct f2fs_sb_info *sbi = fio->sbi; + unsigned int segno; + + fio->new_blkaddr = fio->old_blkaddr; + /* i/o temperature is needed for passing down write hints */ + __get_segment_type(fio); + + segno = GET_SEGNO(sbi, fio->new_blkaddr); + + if (!IS_DATASEG(get_seg_entry(sbi, segno)->type)) { + set_sbi_flag(sbi, SBI_NEED_FSCK); + f2fs_warn(sbi, "%s: incorrect segment(%u) type, run fsck to fix.", + __func__, segno); + err = -EFSCORRUPTED; + f2fs_handle_error(sbi, ERROR_INCONSISTENT_SUM_TYPE); + goto drop_bio; + } + + if (f2fs_cp_error(sbi)) { + err = -EIO; + goto drop_bio; + } + + if (fio->meta_gc) + f2fs_truncate_meta_inode_pages(sbi, fio->new_blkaddr, 1); + + stat_inc_inplace_blocks(fio->sbi); + + if (fio->bio && !IS_F2FS_IPU_NOCACHE(sbi)) + err = f2fs_merge_page_bio(fio); + else + err = f2fs_submit_page_bio(fio); + if (!err) { + f2fs_update_device_state(fio->sbi, fio->ino, + fio->new_blkaddr, 1); + f2fs_update_iostat(fio->sbi, fio_inode(fio), + fio->io_type, F2FS_BLKSIZE); + } + + return err; +drop_bio: + if (fio->bio && *(fio->bio)) { + struct bio *bio = *(fio->bio); - do_write_page(sbi, page, old_blkaddr, - new_blkaddr, &sum, DATA); + bio->bi_status = BLK_STS_IOERR; + bio_endio(bio); + *(fio->bio) = NULL; + } + return err; } -void rewrite_data_page(struct f2fs_sb_info *sbi, struct page *page, - block_t old_blk_addr) +static inline int __f2fs_get_curseg(struct f2fs_sb_info *sbi, + unsigned int segno) { - submit_write_page(sbi, page, old_blk_addr, DATA); + int i; + + for (i = CURSEG_HOT_DATA; i < NO_CHECK_TYPE; i++) { + if (CURSEG_I(sbi, i)->segno == segno) + break; + } + return i; } -void recover_data_page(struct f2fs_sb_info *sbi, - struct page *page, struct f2fs_summary *sum, - block_t old_blkaddr, block_t new_blkaddr) +void f2fs_do_replace_block(struct f2fs_sb_info *sbi, struct f2fs_summary *sum, + block_t old_blkaddr, block_t new_blkaddr, + bool recover_curseg, bool recover_newaddr, + bool from_gc) { struct sit_info *sit_i = SIT_I(sbi); struct curseg_info *curseg; unsigned int segno, old_cursegno; struct seg_entry *se; int type; + unsigned short old_blkoff; + unsigned char old_alloc_type; segno = GET_SEGNO(sbi, new_blkaddr); se = get_seg_entry(sbi, segno); type = se->type; - if (se->valid_blocks == 0 && !IS_CURSEG(sbi, segno)) { - if (old_blkaddr == NULL_ADDR) - type = CURSEG_COLD_DATA; - else + f2fs_down_write(&SM_I(sbi)->curseg_lock); + + if (!recover_curseg) { + /* for recovery flow */ + if (se->valid_blocks == 0 && !is_curseg(sbi, segno)) { + if (old_blkaddr == NULL_ADDR) + type = CURSEG_COLD_DATA; + else + type = CURSEG_WARM_DATA; + } + } else { + if (is_curseg(sbi, segno)) { + /* se->type is volatile as SSR allocation */ + type = __f2fs_get_curseg(sbi, segno); + f2fs_bug_on(sbi, type == NO_CHECK_TYPE); + } else { type = CURSEG_WARM_DATA; + } } + curseg = CURSEG_I(sbi, type); + f2fs_bug_on(sbi, !IS_DATASEG(curseg->seg_type)); mutex_lock(&curseg->curseg_mutex); - mutex_lock(&sit_i->sentry_lock); + down_write(&sit_i->sentry_lock); old_cursegno = curseg->segno; + old_blkoff = curseg->next_blkoff; + old_alloc_type = curseg->alloc_type; /* change the current segment */ if (segno != curseg->segno) { curseg->next_segno = segno; - change_curseg(sbi, type, true); + if (change_curseg(sbi, type)) + goto out_unlock; } - curseg->next_blkoff = GET_SEGOFF_FROM_SEG0(sbi, new_blkaddr) & - (sbi->blocks_per_seg - 1); - __add_sum_entry(sbi, type, sum); + curseg->next_blkoff = GET_BLKOFF_FROM_SEG0(sbi, new_blkaddr); + curseg->sum_blk->entries[curseg->next_blkoff] = *sum; - refresh_sit_entry(sbi, old_blkaddr, new_blkaddr); + if (!recover_curseg || recover_newaddr) { + if (!from_gc) + update_segment_mtime(sbi, new_blkaddr, 0); + update_sit_entry(sbi, new_blkaddr, 1); + } + if (GET_SEGNO(sbi, old_blkaddr) != NULL_SEGNO) { + f2fs_invalidate_internal_cache(sbi, old_blkaddr, 1); + if (!from_gc) + update_segment_mtime(sbi, old_blkaddr, 0); + update_sit_entry(sbi, old_blkaddr, -1); + } - locate_dirty_segment(sbi, old_cursegno); locate_dirty_segment(sbi, GET_SEGNO(sbi, old_blkaddr)); + locate_dirty_segment(sbi, GET_SEGNO(sbi, new_blkaddr)); - mutex_unlock(&sit_i->sentry_lock); + locate_dirty_segment(sbi, old_cursegno); + + if (recover_curseg) { + if (old_cursegno != curseg->segno) { + curseg->next_segno = old_cursegno; + if (change_curseg(sbi, type)) + goto out_unlock; + } + curseg->next_blkoff = old_blkoff; + curseg->alloc_type = old_alloc_type; + } + +out_unlock: + up_write(&sit_i->sentry_lock); mutex_unlock(&curseg->curseg_mutex); + f2fs_up_write(&SM_I(sbi)->curseg_lock); } -void rewrite_node_page(struct f2fs_sb_info *sbi, - struct page *page, struct f2fs_summary *sum, - block_t old_blkaddr, block_t new_blkaddr) +void f2fs_replace_block(struct f2fs_sb_info *sbi, struct dnode_of_data *dn, + block_t old_addr, block_t new_addr, + unsigned char version, bool recover_curseg, + bool recover_newaddr) { - struct sit_info *sit_i = SIT_I(sbi); - int type = CURSEG_WARM_NODE; - struct curseg_info *curseg; - unsigned int segno, old_cursegno; - block_t next_blkaddr = next_blkaddr_of_node(page); - unsigned int next_segno = GET_SEGNO(sbi, next_blkaddr); + struct f2fs_summary sum; - curseg = CURSEG_I(sbi, type); + set_summary(&sum, dn->nid, dn->ofs_in_node, version); - mutex_lock(&curseg->curseg_mutex); - mutex_lock(&sit_i->sentry_lock); + f2fs_do_replace_block(sbi, &sum, old_addr, new_addr, + recover_curseg, recover_newaddr, false); - segno = GET_SEGNO(sbi, new_blkaddr); - old_cursegno = curseg->segno; + f2fs_update_data_blkaddr(dn, new_addr); +} - /* change the current segment */ - if (segno != curseg->segno) { - curseg->next_segno = segno; - change_curseg(sbi, type, true); +void f2fs_folio_wait_writeback(struct folio *folio, enum page_type type, + bool ordered, bool locked) +{ + if (folio_test_writeback(folio)) { + struct f2fs_sb_info *sbi = F2FS_F_SB(folio); + + /* submit cached LFS IO */ + f2fs_submit_merged_write_cond(sbi, NULL, folio, 0, type); + /* submit cached IPU IO */ + f2fs_submit_merged_ipu_write(sbi, NULL, folio); + if (ordered) { + folio_wait_writeback(folio); + f2fs_bug_on(sbi, locked && folio_test_writeback(folio)); + } else { + folio_wait_stable(folio); + } } - curseg->next_blkoff = GET_SEGOFF_FROM_SEG0(sbi, new_blkaddr) & - (sbi->blocks_per_seg - 1); - __add_sum_entry(sbi, type, sum); +} + +void f2fs_wait_on_block_writeback(struct inode *inode, block_t blkaddr) +{ + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); + struct folio *cfolio; + + if (!f2fs_meta_inode_gc_required(inode)) + return; + + if (!__is_valid_data_blkaddr(blkaddr)) + return; - /* change the current log to the next block addr in advance */ - if (next_segno != segno) { - curseg->next_segno = next_segno; - change_curseg(sbi, type, true); + cfolio = filemap_lock_folio(META_MAPPING(sbi), blkaddr); + if (!IS_ERR(cfolio)) { + f2fs_folio_wait_writeback(cfolio, DATA, true, true); + f2fs_folio_put(cfolio, true); } - curseg->next_blkoff = GET_SEGOFF_FROM_SEG0(sbi, next_blkaddr) & - (sbi->blocks_per_seg - 1); +} - /* rewrite node page */ - set_page_writeback(page); - submit_write_page(sbi, page, new_blkaddr, NODE); - f2fs_submit_bio(sbi, NODE, true); - refresh_sit_entry(sbi, old_blkaddr, new_blkaddr); +void f2fs_wait_on_block_writeback_range(struct inode *inode, block_t blkaddr, + block_t len) +{ + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); + block_t i; - locate_dirty_segment(sbi, old_cursegno); - locate_dirty_segment(sbi, GET_SEGNO(sbi, old_blkaddr)); + if (!f2fs_meta_inode_gc_required(inode)) + return; - mutex_unlock(&sit_i->sentry_lock); - mutex_unlock(&curseg->curseg_mutex); + for (i = 0; i < len; i++) + f2fs_wait_on_block_writeback(inode, blkaddr + i); + + f2fs_truncate_meta_inode_pages(sbi, blkaddr, len); } static int read_compacted_summaries(struct f2fs_sb_info *sbi) @@ -957,23 +4290,24 @@ static int read_compacted_summaries(struct f2fs_sb_info *sbi) struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); struct curseg_info *seg_i; unsigned char *kaddr; - struct page *page; + struct folio *folio; block_t start; int i, j, offset; start = start_sum_block(sbi); - page = get_meta_page(sbi, start++); - kaddr = (unsigned char *)page_address(page); + folio = f2fs_get_meta_folio(sbi, start++); + if (IS_ERR(folio)) + return PTR_ERR(folio); + kaddr = folio_address(folio); /* Step 1: restore nat cache */ seg_i = CURSEG_I(sbi, CURSEG_HOT_DATA); - memcpy(&seg_i->sum_blk->n_nats, kaddr, SUM_JOURNAL_SIZE); + memcpy(seg_i->journal, kaddr, SUM_JOURNAL_SIZE); /* Step 2: restore sit cache */ seg_i = CURSEG_I(sbi, CURSEG_COLD_DATA); - memcpy(&seg_i->sum_blk->n_sits, kaddr + SUM_JOURNAL_SIZE, - SUM_JOURNAL_SIZE); + memcpy(seg_i->journal, kaddr + SUM_JOURNAL_SIZE, SUM_JOURNAL_SIZE); offset = 2 * SUM_JOURNAL_SIZE; /* Step 3: restore summary entries */ @@ -990,26 +4324,28 @@ static int read_compacted_summaries(struct f2fs_sb_info *sbi) seg_i->next_blkoff = blk_off; if (seg_i->alloc_type == SSR) - blk_off = sbi->blocks_per_seg; + blk_off = BLKS_PER_SEG(sbi); for (j = 0; j < blk_off; j++) { struct f2fs_summary *s; + s = (struct f2fs_summary *)(kaddr + offset); seg_i->sum_blk->entries[j] = *s; offset += SUMMARY_SIZE; - if (offset + SUMMARY_SIZE <= PAGE_CACHE_SIZE - + if (offset + SUMMARY_SIZE <= PAGE_SIZE - SUM_FOOTER_SIZE) continue; - f2fs_put_page(page, 1); - page = NULL; + f2fs_folio_put(folio, true); - page = get_meta_page(sbi, start++); - kaddr = (unsigned char *)page_address(page); + folio = f2fs_get_meta_folio(sbi, start++); + if (IS_ERR(folio)) + return PTR_ERR(folio); + kaddr = folio_address(folio); offset = 0; } } - f2fs_put_page(page, 1); + f2fs_folio_put(folio, true); return 0; } @@ -1018,18 +4354,19 @@ static int read_normal_summaries(struct f2fs_sb_info *sbi, int type) struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); struct f2fs_summary_block *sum; struct curseg_info *curseg; - struct page *new; + struct folio *new; unsigned short blk_off; unsigned int segno = 0; block_t blk_addr = 0; + int err = 0; /* get segment number and block addr */ if (IS_DATASEG(type)) { segno = le32_to_cpu(ckpt->cur_data_segno[type]); blk_off = le16_to_cpu(ckpt->cur_data_blkoff[type - CURSEG_HOT_DATA]); - if (is_set_ckpt_flags(ckpt, CP_UMOUNT_FLAG)) - blk_addr = sum_blk_addr(sbi, NR_CURSEG_TYPE, type); + if (__exist_node_summaries(sbi)) + blk_addr = sum_blk_addr(sbi, NR_CURSEG_PERSIST_TYPE, type); else blk_addr = sum_blk_addr(sbi, NR_CURSEG_DATA_TYPE, type); } else { @@ -1037,307 +4374,436 @@ static int read_normal_summaries(struct f2fs_sb_info *sbi, int type) CURSEG_HOT_NODE]); blk_off = le16_to_cpu(ckpt->cur_node_blkoff[type - CURSEG_HOT_NODE]); - if (is_set_ckpt_flags(ckpt, CP_UMOUNT_FLAG)) + if (__exist_node_summaries(sbi)) blk_addr = sum_blk_addr(sbi, NR_CURSEG_NODE_TYPE, type - CURSEG_HOT_NODE); else blk_addr = GET_SUM_BLOCK(sbi, segno); } - new = get_meta_page(sbi, blk_addr); - sum = (struct f2fs_summary_block *)page_address(new); + new = f2fs_get_meta_folio(sbi, blk_addr); + if (IS_ERR(new)) + return PTR_ERR(new); + sum = folio_address(new); if (IS_NODESEG(type)) { - if (is_set_ckpt_flags(ckpt, CP_UMOUNT_FLAG)) { + if (__exist_node_summaries(sbi)) { struct f2fs_summary *ns = &sum->entries[0]; int i; - for (i = 0; i < sbi->blocks_per_seg; i++, ns++) { + + for (i = 0; i < BLKS_PER_SEG(sbi); i++, ns++) { ns->version = 0; ns->ofs_in_node = 0; } } else { - if (restore_node_summary(sbi, segno, sum)) { - f2fs_put_page(new, 1); - return -EINVAL; - } + err = f2fs_restore_node_summary(sbi, segno, sum); + if (err) + goto out; } } /* set uncompleted segment to curseg */ curseg = CURSEG_I(sbi, type); mutex_lock(&curseg->curseg_mutex); - memcpy(curseg->sum_blk, sum, PAGE_CACHE_SIZE); + + /* update journal info */ + down_write(&curseg->journal_rwsem); + memcpy(curseg->journal, &sum->journal, SUM_JOURNAL_SIZE); + up_write(&curseg->journal_rwsem); + + memcpy(curseg->sum_blk->entries, sum->entries, SUM_ENTRY_SIZE); + memcpy(&curseg->sum_blk->footer, &sum->footer, SUM_FOOTER_SIZE); curseg->next_segno = segno; reset_curseg(sbi, type, 0); curseg->alloc_type = ckpt->alloc_type[type]; curseg->next_blkoff = blk_off; mutex_unlock(&curseg->curseg_mutex); - f2fs_put_page(new, 1); - return 0; +out: + f2fs_folio_put(new, true); + return err; } static int restore_curseg_summaries(struct f2fs_sb_info *sbi) { + struct f2fs_journal *sit_j = CURSEG_I(sbi, CURSEG_COLD_DATA)->journal; + struct f2fs_journal *nat_j = CURSEG_I(sbi, CURSEG_HOT_DATA)->journal; int type = CURSEG_HOT_DATA; + int err; + + if (is_set_ckpt_flags(sbi, CP_COMPACT_SUM_FLAG)) { + int npages = f2fs_npages_for_summary_flush(sbi, true); + + if (npages >= 2) + f2fs_ra_meta_pages(sbi, start_sum_block(sbi), npages, + META_CP, true); - if (is_set_ckpt_flags(F2FS_CKPT(sbi), CP_COMPACT_SUM_FLAG)) { /* restore for compacted data summary */ - if (read_compacted_summaries(sbi)) - return -EINVAL; + err = read_compacted_summaries(sbi); + if (err) + return err; type = CURSEG_HOT_NODE; } - for (; type <= CURSEG_COLD_NODE; type++) - if (read_normal_summaries(sbi, type)) - return -EINVAL; + if (__exist_node_summaries(sbi)) + f2fs_ra_meta_pages(sbi, + sum_blk_addr(sbi, NR_CURSEG_PERSIST_TYPE, type), + NR_CURSEG_PERSIST_TYPE - type, META_CP, true); + + for (; type <= CURSEG_COLD_NODE; type++) { + err = read_normal_summaries(sbi, type); + if (err) + return err; + } + + /* sanity check for summary blocks */ + if (nats_in_cursum(nat_j) > NAT_JOURNAL_ENTRIES || + sits_in_cursum(sit_j) > SIT_JOURNAL_ENTRIES) { + f2fs_err(sbi, "invalid journal entries nats %u sits %u", + nats_in_cursum(nat_j), sits_in_cursum(sit_j)); + return -EINVAL; + } + return 0; } static void write_compacted_summaries(struct f2fs_sb_info *sbi, block_t blkaddr) { - struct page *page; + struct folio *folio; unsigned char *kaddr; struct f2fs_summary *summary; struct curseg_info *seg_i; int written_size = 0; int i, j; - page = grab_meta_page(sbi, blkaddr++); - kaddr = (unsigned char *)page_address(page); + folio = f2fs_grab_meta_folio(sbi, blkaddr++); + kaddr = folio_address(folio); + memset(kaddr, 0, PAGE_SIZE); /* Step 1: write nat cache */ seg_i = CURSEG_I(sbi, CURSEG_HOT_DATA); - memcpy(kaddr, &seg_i->sum_blk->n_nats, SUM_JOURNAL_SIZE); + memcpy(kaddr, seg_i->journal, SUM_JOURNAL_SIZE); written_size += SUM_JOURNAL_SIZE; /* Step 2: write sit cache */ seg_i = CURSEG_I(sbi, CURSEG_COLD_DATA); - memcpy(kaddr + written_size, &seg_i->sum_blk->n_sits, - SUM_JOURNAL_SIZE); + memcpy(kaddr + written_size, seg_i->journal, SUM_JOURNAL_SIZE); written_size += SUM_JOURNAL_SIZE; - set_page_dirty(page); - /* Step 3: write summary entries */ for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) { - unsigned short blkoff; seg_i = CURSEG_I(sbi, i); - if (sbi->ckpt->alloc_type[i] == SSR) - blkoff = sbi->blocks_per_seg; - else - blkoff = curseg_blkoff(sbi, i); - - for (j = 0; j < blkoff; j++) { - if (!page) { - page = grab_meta_page(sbi, blkaddr++); - kaddr = (unsigned char *)page_address(page); + for (j = 0; j < f2fs_curseg_valid_blocks(sbi, i); j++) { + if (!folio) { + folio = f2fs_grab_meta_folio(sbi, blkaddr++); + kaddr = folio_address(folio); + memset(kaddr, 0, PAGE_SIZE); written_size = 0; } summary = (struct f2fs_summary *)(kaddr + written_size); *summary = seg_i->sum_blk->entries[j]; written_size += SUMMARY_SIZE; - set_page_dirty(page); - if (written_size + SUMMARY_SIZE <= PAGE_CACHE_SIZE - + if (written_size + SUMMARY_SIZE <= PAGE_SIZE - SUM_FOOTER_SIZE) continue; - f2fs_put_page(page, 1); - page = NULL; + folio_mark_dirty(folio); + f2fs_folio_put(folio, true); + folio = NULL; } } - if (page) - f2fs_put_page(page, 1); + if (folio) { + folio_mark_dirty(folio); + f2fs_folio_put(folio, true); + } } static void write_normal_summaries(struct f2fs_sb_info *sbi, block_t blkaddr, int type) { int i, end; + if (IS_DATASEG(type)) end = type + NR_CURSEG_DATA_TYPE; else end = type + NR_CURSEG_NODE_TYPE; - for (i = type; i < end; i++) { - struct curseg_info *sum = CURSEG_I(sbi, i); - mutex_lock(&sum->curseg_mutex); - write_sum_page(sbi, sum->sum_blk, blkaddr + (i - type)); - mutex_unlock(&sum->curseg_mutex); - } + for (i = type; i < end; i++) + write_current_sum_page(sbi, i, blkaddr + (i - type)); } -void write_data_summaries(struct f2fs_sb_info *sbi, block_t start_blk) +void f2fs_write_data_summaries(struct f2fs_sb_info *sbi, block_t start_blk) { - if (is_set_ckpt_flags(F2FS_CKPT(sbi), CP_COMPACT_SUM_FLAG)) + if (is_set_ckpt_flags(sbi, CP_COMPACT_SUM_FLAG)) write_compacted_summaries(sbi, start_blk); else write_normal_summaries(sbi, start_blk, CURSEG_HOT_DATA); } -void write_node_summaries(struct f2fs_sb_info *sbi, block_t start_blk) +void f2fs_write_node_summaries(struct f2fs_sb_info *sbi, block_t start_blk) { - if (is_set_ckpt_flags(F2FS_CKPT(sbi), CP_UMOUNT_FLAG)) - write_normal_summaries(sbi, start_blk, CURSEG_HOT_NODE); - return; + write_normal_summaries(sbi, start_blk, CURSEG_HOT_NODE); } -int lookup_journal_in_cursum(struct f2fs_summary_block *sum, int type, +int f2fs_lookup_journal_in_cursum(struct f2fs_journal *journal, int type, unsigned int val, int alloc) { int i; if (type == NAT_JOURNAL) { - for (i = 0; i < nats_in_cursum(sum); i++) { - if (le32_to_cpu(nid_in_journal(sum, i)) == val) + for (i = 0; i < nats_in_cursum(journal); i++) { + if (le32_to_cpu(nid_in_journal(journal, i)) == val) return i; } - if (alloc && nats_in_cursum(sum) < NAT_JOURNAL_ENTRIES) - return update_nats_in_cursum(sum, 1); + if (alloc && __has_cursum_space(journal, 1, NAT_JOURNAL)) + return update_nats_in_cursum(journal, 1); } else if (type == SIT_JOURNAL) { - for (i = 0; i < sits_in_cursum(sum); i++) - if (le32_to_cpu(segno_in_journal(sum, i)) == val) + for (i = 0; i < sits_in_cursum(journal); i++) + if (le32_to_cpu(segno_in_journal(journal, i)) == val) return i; - if (alloc && sits_in_cursum(sum) < SIT_JOURNAL_ENTRIES) - return update_sits_in_cursum(sum, 1); + if (alloc && __has_cursum_space(journal, 1, SIT_JOURNAL)) + return update_sits_in_cursum(journal, 1); } return -1; } -static struct page *get_current_sit_page(struct f2fs_sb_info *sbi, +static struct folio *get_current_sit_folio(struct f2fs_sb_info *sbi, unsigned int segno) { - struct sit_info *sit_i = SIT_I(sbi); - unsigned int offset = SIT_BLOCK_OFFSET(sit_i, segno); - block_t blk_addr = sit_i->sit_base_addr + offset; - - check_seg_range(sbi, segno); - - /* calculate sit block address */ - if (f2fs_test_bit(offset, sit_i->sit_bitmap)) - blk_addr += sit_i->sit_blocks; - - return get_meta_page(sbi, blk_addr); + return f2fs_get_meta_folio(sbi, current_sit_addr(sbi, segno)); } -static struct page *get_next_sit_page(struct f2fs_sb_info *sbi, +static struct folio *get_next_sit_folio(struct f2fs_sb_info *sbi, unsigned int start) { struct sit_info *sit_i = SIT_I(sbi); - struct page *src_page, *dst_page; + struct folio *folio; pgoff_t src_off, dst_off; - void *src_addr, *dst_addr; src_off = current_sit_addr(sbi, start); dst_off = next_sit_addr(sbi, src_off); - /* get current sit block page without lock */ - src_page = get_meta_page(sbi, src_off); - dst_page = grab_meta_page(sbi, dst_off); - BUG_ON(PageDirty(src_page)); + folio = f2fs_grab_meta_folio(sbi, dst_off); + seg_info_to_sit_folio(sbi, folio, start); - src_addr = page_address(src_page); - dst_addr = page_address(dst_page); - memcpy(dst_addr, src_addr, PAGE_CACHE_SIZE); + folio_mark_dirty(folio); + set_to_next_sit(sit_i, start); - set_page_dirty(dst_page); - f2fs_put_page(src_page, 1); + return folio; +} - set_to_next_sit(sit_i, start); +static struct sit_entry_set *grab_sit_entry_set(void) +{ + struct sit_entry_set *ses = + f2fs_kmem_cache_alloc(sit_entry_set_slab, + GFP_NOFS, true, NULL); - return dst_page; + ses->entry_cnt = 0; + INIT_LIST_HEAD(&ses->set_list); + return ses; } -static bool flush_sits_in_journal(struct f2fs_sb_info *sbi) +static void release_sit_entry_set(struct sit_entry_set *ses) +{ + list_del(&ses->set_list); + kmem_cache_free(sit_entry_set_slab, ses); +} + +static void adjust_sit_entry_set(struct sit_entry_set *ses, + struct list_head *head) +{ + struct sit_entry_set *next = ses; + + if (list_is_last(&ses->set_list, head)) + return; + + list_for_each_entry_continue(next, head, set_list) + if (ses->entry_cnt <= next->entry_cnt) { + list_move_tail(&ses->set_list, &next->set_list); + return; + } + + list_move_tail(&ses->set_list, head); +} + +static void add_sit_entry(unsigned int segno, struct list_head *head) +{ + struct sit_entry_set *ses; + unsigned int start_segno = START_SEGNO(segno); + + list_for_each_entry(ses, head, set_list) { + if (ses->start_segno == start_segno) { + ses->entry_cnt++; + adjust_sit_entry_set(ses, head); + return; + } + } + + ses = grab_sit_entry_set(); + + ses->start_segno = start_segno; + ses->entry_cnt++; + list_add(&ses->set_list, head); +} + +static void add_sits_in_set(struct f2fs_sb_info *sbi) +{ + struct f2fs_sm_info *sm_info = SM_I(sbi); + struct list_head *set_list = &sm_info->sit_entry_set; + unsigned long *bitmap = SIT_I(sbi)->dirty_sentries_bitmap; + unsigned int segno; + + for_each_set_bit(segno, bitmap, MAIN_SEGS(sbi)) + add_sit_entry(segno, set_list); +} + +static void remove_sits_in_journal(struct f2fs_sb_info *sbi) { struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA); - struct f2fs_summary_block *sum = curseg->sum_blk; + struct f2fs_journal *journal = curseg->journal; int i; - /* - * If the journal area in the current summary is full of sit entries, - * all the sit entries will be flushed. Otherwise the sit entries - * are not able to replace with newly hot sit entries. - */ - if (sits_in_cursum(sum) >= SIT_JOURNAL_ENTRIES) { - for (i = sits_in_cursum(sum) - 1; i >= 0; i--) { - unsigned int segno; - segno = le32_to_cpu(segno_in_journal(sum, i)); - __mark_sit_entry_dirty(sbi, segno); - } - update_sits_in_cursum(sum, -sits_in_cursum(sum)); - return 1; + down_write(&curseg->journal_rwsem); + for (i = 0; i < sits_in_cursum(journal); i++) { + unsigned int segno; + bool dirtied; + + segno = le32_to_cpu(segno_in_journal(journal, i)); + dirtied = __mark_sit_entry_dirty(sbi, segno); + + if (!dirtied) + add_sit_entry(segno, &SM_I(sbi)->sit_entry_set); } - return 0; + update_sits_in_cursum(journal, -i); + up_write(&curseg->journal_rwsem); } /* * CP calls this function, which flushes SIT entries including sit_journal, * and moves prefree segs to free segs. */ -void flush_sit_entries(struct f2fs_sb_info *sbi) +void f2fs_flush_sit_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc) { struct sit_info *sit_i = SIT_I(sbi); unsigned long *bitmap = sit_i->dirty_sentries_bitmap; struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA); - struct f2fs_summary_block *sum = curseg->sum_blk; - unsigned long nsegs = TOTAL_SEGS(sbi); - struct page *page = NULL; - struct f2fs_sit_block *raw_sit = NULL; - unsigned int start = 0, end = 0; - unsigned int segno = -1; - bool flushed; + struct f2fs_journal *journal = curseg->journal; + struct sit_entry_set *ses, *tmp; + struct list_head *head = &SM_I(sbi)->sit_entry_set; + bool to_journal = !is_sbi_flag_set(sbi, SBI_IS_RESIZEFS); + struct seg_entry *se; - mutex_lock(&curseg->curseg_mutex); - mutex_lock(&sit_i->sentry_lock); + down_write(&sit_i->sentry_lock); + + if (!sit_i->dirty_sentries) + goto out; /* - * "flushed" indicates whether sit entries in journal are flushed - * to the SIT area or not. + * add and account sit entries of dirty bitmap in sit entry + * set temporarily */ - flushed = flush_sits_in_journal(sbi); + add_sits_in_set(sbi); - while ((segno = find_next_bit(bitmap, nsegs, segno + 1)) < nsegs) { - struct seg_entry *se = get_seg_entry(sbi, segno); - int sit_offset, offset; + /* + * if there are no enough space in journal to store dirty sit + * entries, remove all entries from journal and add and account + * them in sit entry set. + */ + if (!__has_cursum_space(journal, sit_i->dirty_sentries, SIT_JOURNAL) || + !to_journal) + remove_sits_in_journal(sbi); - sit_offset = SIT_ENTRY_OFFSET(sit_i, segno); + /* + * there are two steps to flush sit entries: + * #1, flush sit entries to journal in current cold data summary block. + * #2, flush sit entries to sit page. + */ + list_for_each_entry_safe(ses, tmp, head, set_list) { + struct folio *folio = NULL; + struct f2fs_sit_block *raw_sit = NULL; + unsigned int start_segno = ses->start_segno; + unsigned int end = min(start_segno + SIT_ENTRY_PER_BLOCK, + (unsigned long)MAIN_SEGS(sbi)); + unsigned int segno = start_segno; + + if (to_journal && + !__has_cursum_space(journal, ses->entry_cnt, SIT_JOURNAL)) + to_journal = false; + + if (to_journal) { + down_write(&curseg->journal_rwsem); + } else { + folio = get_next_sit_folio(sbi, start_segno); + raw_sit = folio_address(folio); + } - if (flushed) - goto to_sit_page; + /* flush dirty sit entries in region of current sit set */ + for_each_set_bit_from(segno, bitmap, end) { + int offset, sit_offset; - offset = lookup_journal_in_cursum(sum, SIT_JOURNAL, segno, 1); - if (offset >= 0) { - segno_in_journal(sum, offset) = cpu_to_le32(segno); - seg_info_to_raw_sit(se, &sit_in_journal(sum, offset)); - goto flush_done; - } -to_sit_page: - if (!page || (start > segno) || (segno > end)) { - if (page) { - f2fs_put_page(page, 1); - page = NULL; + se = get_seg_entry(sbi, segno); +#ifdef CONFIG_F2FS_CHECK_FS + if (memcmp(se->cur_valid_map, se->cur_valid_map_mir, + SIT_VBLOCK_MAP_SIZE)) + f2fs_bug_on(sbi, 1); +#endif + + /* add discard candidates */ + if (!(cpc->reason & CP_DISCARD)) { + cpc->trim_start = segno; + add_discard_addrs(sbi, cpc, false); } - start = START_SEGNO(sit_i, segno); - end = start + SIT_ENTRY_PER_BLOCK - 1; + if (to_journal) { + offset = f2fs_lookup_journal_in_cursum(journal, + SIT_JOURNAL, segno, 1); + f2fs_bug_on(sbi, offset < 0); + segno_in_journal(journal, offset) = + cpu_to_le32(segno); + seg_info_to_raw_sit(se, + &sit_in_journal(journal, offset)); + check_block_count(sbi, segno, + &sit_in_journal(journal, offset)); + } else { + sit_offset = SIT_ENTRY_OFFSET(sit_i, segno); + seg_info_to_raw_sit(se, + &raw_sit->entries[sit_offset]); + check_block_count(sbi, segno, + &raw_sit->entries[sit_offset]); + } + + /* update ckpt_valid_block */ + if (__is_large_section(sbi)) { + set_ckpt_valid_blocks(sbi, segno); + sanity_check_valid_blocks(sbi, segno); + } - /* read sit block that will be updated */ - page = get_next_sit_page(sbi, start); - raw_sit = page_address(page); + __clear_bit(segno, bitmap); + sit_i->dirty_sentries--; + ses->entry_cnt--; } - /* udpate entry in SIT block */ - seg_info_to_raw_sit(se, &raw_sit->entries[sit_offset]); -flush_done: - __clear_bit(segno, bitmap); - sit_i->dirty_sentries--; + if (to_journal) + up_write(&curseg->journal_rwsem); + else + f2fs_folio_put(folio, true); + + f2fs_bug_on(sbi, ses->entry_cnt); + release_sit_entry_set(ses); } - mutex_unlock(&sit_i->sentry_lock); - mutex_unlock(&curseg->curseg_mutex); - /* writeout last modified SIT block */ - f2fs_put_page(page, 1); + f2fs_bug_on(sbi, !list_empty(head)); + f2fs_bug_on(sbi, sit_i->dirty_sentries); +out: + if (cpc->reason & CP_DISCARD) { + __u64 trim_start = cpc->trim_start; + + for (; cpc->trim_start <= cpc->trim_end; cpc->trim_start++) + add_discard_addrs(sbi, cpc, false); + + cpc->trim_start = trim_start; + } + up_write(&sit_i->sentry_lock); set_prefree_as_free_segments(sbi); } @@ -1345,41 +4811,70 @@ flush_done: static int build_sit_info(struct f2fs_sb_info *sbi) { struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi); - struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); struct sit_info *sit_i; unsigned int sit_segs, start; - char *src_bitmap, *dst_bitmap; - unsigned int bitmap_size; + char *src_bitmap, *bitmap; + unsigned int bitmap_size, main_bitmap_size, sit_bitmap_size; + unsigned int discard_map = f2fs_block_unit_discard(sbi) ? 1 : 0; /* allocate memory for SIT information */ - sit_i = kzalloc(sizeof(struct sit_info), GFP_KERNEL); + sit_i = f2fs_kzalloc(sbi, sizeof(struct sit_info), GFP_KERNEL); if (!sit_i) return -ENOMEM; SM_I(sbi)->sit_info = sit_i; - sit_i->sentries = vzalloc(TOTAL_SEGS(sbi) * sizeof(struct seg_entry)); + sit_i->sentries = + f2fs_kvzalloc(sbi, array_size(sizeof(struct seg_entry), + MAIN_SEGS(sbi)), + GFP_KERNEL); if (!sit_i->sentries) return -ENOMEM; - bitmap_size = f2fs_bitmap_size(TOTAL_SEGS(sbi)); - sit_i->dirty_sentries_bitmap = kzalloc(bitmap_size, GFP_KERNEL); + main_bitmap_size = f2fs_bitmap_size(MAIN_SEGS(sbi)); + sit_i->dirty_sentries_bitmap = f2fs_kvzalloc(sbi, main_bitmap_size, + GFP_KERNEL); if (!sit_i->dirty_sentries_bitmap) return -ENOMEM; - for (start = 0; start < TOTAL_SEGS(sbi); start++) { - sit_i->sentries[start].cur_valid_map - = kzalloc(SIT_VBLOCK_MAP_SIZE, GFP_KERNEL); - sit_i->sentries[start].ckpt_valid_map - = kzalloc(SIT_VBLOCK_MAP_SIZE, GFP_KERNEL); - if (!sit_i->sentries[start].cur_valid_map - || !sit_i->sentries[start].ckpt_valid_map) - return -ENOMEM; +#ifdef CONFIG_F2FS_CHECK_FS + bitmap_size = MAIN_SEGS(sbi) * SIT_VBLOCK_MAP_SIZE * (3 + discard_map); +#else + bitmap_size = MAIN_SEGS(sbi) * SIT_VBLOCK_MAP_SIZE * (2 + discard_map); +#endif + sit_i->bitmap = f2fs_kvzalloc(sbi, bitmap_size, GFP_KERNEL); + if (!sit_i->bitmap) + return -ENOMEM; + + bitmap = sit_i->bitmap; + + for (start = 0; start < MAIN_SEGS(sbi); start++) { + sit_i->sentries[start].cur_valid_map = bitmap; + bitmap += SIT_VBLOCK_MAP_SIZE; + + sit_i->sentries[start].ckpt_valid_map = bitmap; + bitmap += SIT_VBLOCK_MAP_SIZE; + +#ifdef CONFIG_F2FS_CHECK_FS + sit_i->sentries[start].cur_valid_map_mir = bitmap; + bitmap += SIT_VBLOCK_MAP_SIZE; +#endif + + if (discard_map) { + sit_i->sentries[start].discard_map = bitmap; + bitmap += SIT_VBLOCK_MAP_SIZE; + } } - if (sbi->segs_per_sec > 1) { - sit_i->sec_entries = vzalloc(TOTAL_SECS(sbi) * - sizeof(struct sec_entry)); + sit_i->tmp_map = f2fs_kzalloc(sbi, SIT_VBLOCK_MAP_SIZE, GFP_KERNEL); + if (!sit_i->tmp_map) + return -ENOMEM; + + if (__is_large_section(sbi)) { + sit_i->sec_entries = + f2fs_kvzalloc(sbi, array_size(sizeof(struct sec_entry), + MAIN_SECS(sbi)), + GFP_KERNEL); if (!sit_i->sec_entries) return -ENOMEM; } @@ -1388,49 +4883,56 @@ static int build_sit_info(struct f2fs_sb_info *sbi) sit_segs = le32_to_cpu(raw_super->segment_count_sit) >> 1; /* setup SIT bitmap from ckeckpoint pack */ - bitmap_size = __bitmap_size(sbi, SIT_BITMAP); + sit_bitmap_size = __bitmap_size(sbi, SIT_BITMAP); src_bitmap = __bitmap_ptr(sbi, SIT_BITMAP); - dst_bitmap = kmemdup(src_bitmap, bitmap_size, GFP_KERNEL); - if (!dst_bitmap) + sit_i->sit_bitmap = kmemdup(src_bitmap, sit_bitmap_size, GFP_KERNEL); + if (!sit_i->sit_bitmap) + return -ENOMEM; + +#ifdef CONFIG_F2FS_CHECK_FS + sit_i->sit_bitmap_mir = kmemdup(src_bitmap, + sit_bitmap_size, GFP_KERNEL); + if (!sit_i->sit_bitmap_mir) return -ENOMEM; - /* init SIT information */ - sit_i->s_ops = &default_salloc_ops; + sit_i->invalid_segmap = f2fs_kvzalloc(sbi, + main_bitmap_size, GFP_KERNEL); + if (!sit_i->invalid_segmap) + return -ENOMEM; +#endif sit_i->sit_base_addr = le32_to_cpu(raw_super->sit_blkaddr); - sit_i->sit_blocks = sit_segs << sbi->log_blocks_per_seg; - sit_i->written_valid_blocks = le64_to_cpu(ckpt->valid_block_count); - sit_i->sit_bitmap = dst_bitmap; - sit_i->bitmap_size = bitmap_size; + sit_i->sit_blocks = SEGS_TO_BLKS(sbi, sit_segs); + sit_i->written_valid_blocks = 0; + sit_i->bitmap_size = sit_bitmap_size; sit_i->dirty_sentries = 0; sit_i->sents_per_block = SIT_ENTRY_PER_BLOCK; sit_i->elapsed_time = le64_to_cpu(sbi->ckpt->elapsed_time); - sit_i->mounted_time = CURRENT_TIME_SEC.tv_sec; - mutex_init(&sit_i->sentry_lock); + sit_i->mounted_time = ktime_get_boottime_seconds(); + init_rwsem(&sit_i->sentry_lock); return 0; } static int build_free_segmap(struct f2fs_sb_info *sbi) { - struct f2fs_sm_info *sm_info = SM_I(sbi); struct free_segmap_info *free_i; unsigned int bitmap_size, sec_bitmap_size; /* allocate memory for free segmap information */ - free_i = kzalloc(sizeof(struct free_segmap_info), GFP_KERNEL); + free_i = f2fs_kzalloc(sbi, sizeof(struct free_segmap_info), GFP_KERNEL); if (!free_i) return -ENOMEM; SM_I(sbi)->free_info = free_i; - bitmap_size = f2fs_bitmap_size(TOTAL_SEGS(sbi)); - free_i->free_segmap = kmalloc(bitmap_size, GFP_KERNEL); + bitmap_size = f2fs_bitmap_size(MAIN_SEGS(sbi)); + free_i->free_segmap = f2fs_kvmalloc(sbi, bitmap_size, GFP_KERNEL); if (!free_i->free_segmap) return -ENOMEM; - sec_bitmap_size = f2fs_bitmap_size(TOTAL_SECS(sbi)); - free_i->free_secmap = kmalloc(sec_bitmap_size, GFP_KERNEL); + sec_bitmap_size = f2fs_bitmap_size(MAIN_SECS(sbi)); + free_i->free_secmap = f2fs_kvmalloc(sbi, sec_bitmap_size, GFP_KERNEL); if (!free_i->free_secmap) return -ENOMEM; @@ -1439,11 +4941,10 @@ static int build_free_segmap(struct f2fs_sb_info *sbi) memset(free_i->free_secmap, 0xff, sec_bitmap_size); /* init free segmap information */ - free_i->start_segno = - (unsigned int) GET_SEGNO_FROM_SEG0(sbi, sm_info->main_blkaddr); + free_i->start_segno = GET_SEGNO_FROM_SEG0(sbi, MAIN_BLKADDR(sbi)); free_i->free_segments = 0; free_i->free_sections = 0; - rwlock_init(&free_i->segmap_lock); + spin_lock_init(&free_i->segmap_lock); return 0; } @@ -1452,74 +4953,205 @@ static int build_curseg(struct f2fs_sb_info *sbi) struct curseg_info *array; int i; - array = kzalloc(sizeof(*array) * NR_CURSEG_TYPE, GFP_KERNEL); + array = f2fs_kzalloc(sbi, array_size(NR_CURSEG_TYPE, + sizeof(*array)), GFP_KERNEL); if (!array) return -ENOMEM; SM_I(sbi)->curseg_array = array; - for (i = 0; i < NR_CURSEG_TYPE; i++) { + for (i = 0; i < NO_CHECK_TYPE; i++) { mutex_init(&array[i].curseg_mutex); - array[i].sum_blk = kzalloc(PAGE_CACHE_SIZE, GFP_KERNEL); + array[i].sum_blk = f2fs_kzalloc(sbi, PAGE_SIZE, GFP_KERNEL); if (!array[i].sum_blk) return -ENOMEM; - array[i].segno = NULL_SEGNO; - array[i].next_blkoff = 0; + init_rwsem(&array[i].journal_rwsem); + array[i].journal = f2fs_kzalloc(sbi, + sizeof(struct f2fs_journal), GFP_KERNEL); + if (!array[i].journal) + return -ENOMEM; + array[i].seg_type = log_type_to_seg_type(i); + reset_curseg_fields(&array[i]); } return restore_curseg_summaries(sbi); } -static void build_sit_entries(struct f2fs_sb_info *sbi) +static int build_sit_entries(struct f2fs_sb_info *sbi) { struct sit_info *sit_i = SIT_I(sbi); struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA); - struct f2fs_summary_block *sum = curseg->sum_blk; - unsigned int start; + struct f2fs_journal *journal = curseg->journal; + struct seg_entry *se; + struct f2fs_sit_entry sit; + int sit_blk_cnt = SIT_BLK_CNT(sbi); + unsigned int i, start, end; + unsigned int readed, start_blk = 0; + int err = 0; + block_t sit_valid_blocks[2] = {0, 0}; - for (start = 0; start < TOTAL_SEGS(sbi); start++) { - struct seg_entry *se = &sit_i->sentries[start]; - struct f2fs_sit_block *sit_blk; - struct f2fs_sit_entry sit; - struct page *page; - int i; + do { + readed = f2fs_ra_meta_pages(sbi, start_blk, BIO_MAX_VECS, + META_SIT, true); + + start = start_blk * sit_i->sents_per_block; + end = (start_blk + readed) * sit_i->sents_per_block; + + for (; start < end && start < MAIN_SEGS(sbi); start++) { + struct f2fs_sit_block *sit_blk; + struct folio *folio; + + se = &sit_i->sentries[start]; + folio = get_current_sit_folio(sbi, start); + if (IS_ERR(folio)) + return PTR_ERR(folio); + sit_blk = folio_address(folio); + sit = sit_blk->entries[SIT_ENTRY_OFFSET(sit_i, start)]; + f2fs_folio_put(folio, true); + + err = check_block_count(sbi, start, &sit); + if (err) + return err; + seg_info_from_raw_sit(se, &sit); + + if (se->type >= NR_PERSISTENT_LOG) { + f2fs_err(sbi, "Invalid segment type: %u, segno: %u", + se->type, start); + f2fs_handle_error(sbi, + ERROR_INCONSISTENT_SUM_TYPE); + return -EFSCORRUPTED; + } + + sit_valid_blocks[SE_PAGETYPE(se)] += se->valid_blocks; - mutex_lock(&curseg->curseg_mutex); - for (i = 0; i < sits_in_cursum(sum); i++) { - if (le32_to_cpu(segno_in_journal(sum, i)) == start) { - sit = sit_in_journal(sum, i); - mutex_unlock(&curseg->curseg_mutex); - goto got_it; + if (!f2fs_block_unit_discard(sbi)) + goto init_discard_map_done; + + /* build discard map only one time */ + if (is_set_ckpt_flags(sbi, CP_TRIMMED_FLAG)) { + memset(se->discard_map, 0xff, + SIT_VBLOCK_MAP_SIZE); + goto init_discard_map_done; } + memcpy(se->discard_map, se->cur_valid_map, + SIT_VBLOCK_MAP_SIZE); + sbi->discard_blks += BLKS_PER_SEG(sbi) - + se->valid_blocks; +init_discard_map_done: + if (__is_large_section(sbi)) + get_sec_entry(sbi, start)->valid_blocks += + se->valid_blocks; } - mutex_unlock(&curseg->curseg_mutex); - page = get_current_sit_page(sbi, start); - sit_blk = (struct f2fs_sit_block *)page_address(page); - sit = sit_blk->entries[SIT_ENTRY_OFFSET(sit_i, start)]; - f2fs_put_page(page, 1); -got_it: - check_block_count(sbi, start, &sit); + start_blk += readed; + } while (start_blk < sit_blk_cnt); + + down_read(&curseg->journal_rwsem); + for (i = 0; i < sits_in_cursum(journal); i++) { + unsigned int old_valid_blocks; + + start = le32_to_cpu(segno_in_journal(journal, i)); + if (start >= MAIN_SEGS(sbi)) { + f2fs_err(sbi, "Wrong journal entry on segno %u", + start); + err = -EFSCORRUPTED; + f2fs_handle_error(sbi, ERROR_CORRUPTED_JOURNAL); + break; + } + + se = &sit_i->sentries[start]; + sit = sit_in_journal(journal, i); + + old_valid_blocks = se->valid_blocks; + + sit_valid_blocks[SE_PAGETYPE(se)] -= old_valid_blocks; + + err = check_block_count(sbi, start, &sit); + if (err) + break; seg_info_from_raw_sit(se, &sit); - if (sbi->segs_per_sec > 1) { - struct sec_entry *e = get_sec_entry(sbi, start); - e->valid_blocks += se->valid_blocks; + + if (se->type >= NR_PERSISTENT_LOG) { + f2fs_err(sbi, "Invalid segment type: %u, segno: %u", + se->type, start); + err = -EFSCORRUPTED; + f2fs_handle_error(sbi, ERROR_INCONSISTENT_SUM_TYPE); + break; + } + + sit_valid_blocks[SE_PAGETYPE(se)] += se->valid_blocks; + + if (f2fs_block_unit_discard(sbi)) { + if (is_set_ckpt_flags(sbi, CP_TRIMMED_FLAG)) { + memset(se->discard_map, 0xff, SIT_VBLOCK_MAP_SIZE); + } else { + memcpy(se->discard_map, se->cur_valid_map, + SIT_VBLOCK_MAP_SIZE); + sbi->discard_blks += old_valid_blocks; + sbi->discard_blks -= se->valid_blocks; + } + } + + if (__is_large_section(sbi)) { + get_sec_entry(sbi, start)->valid_blocks += + se->valid_blocks; + get_sec_entry(sbi, start)->valid_blocks -= + old_valid_blocks; + } + } + up_read(&curseg->journal_rwsem); + + /* update ckpt_valid_block */ + if (__is_large_section(sbi)) { + unsigned int segno; + + for (segno = 0; segno < MAIN_SEGS(sbi); segno += SEGS_PER_SEC(sbi)) { + set_ckpt_valid_blocks(sbi, segno); + sanity_check_valid_blocks(sbi, segno); } } + + if (err) + return err; + + if (sit_valid_blocks[NODE] != valid_node_count(sbi)) { + f2fs_err(sbi, "SIT is corrupted node# %u vs %u", + sit_valid_blocks[NODE], valid_node_count(sbi)); + f2fs_handle_error(sbi, ERROR_INCONSISTENT_NODE_COUNT); + return -EFSCORRUPTED; + } + + if (sit_valid_blocks[DATA] + sit_valid_blocks[NODE] > + valid_user_blocks(sbi)) { + f2fs_err(sbi, "SIT is corrupted data# %u %u vs %u", + sit_valid_blocks[DATA], sit_valid_blocks[NODE], + valid_user_blocks(sbi)); + f2fs_handle_error(sbi, ERROR_INCONSISTENT_BLOCK_COUNT); + return -EFSCORRUPTED; + } + + return 0; } static void init_free_segmap(struct f2fs_sb_info *sbi) { unsigned int start; int type; + struct seg_entry *sentry; - for (start = 0; start < TOTAL_SEGS(sbi); start++) { - struct seg_entry *sentry = get_seg_entry(sbi, start); + for (start = 0; start < MAIN_SEGS(sbi); start++) { + if (f2fs_usable_blks_in_seg(sbi, start) == 0) + continue; + sentry = get_seg_entry(sbi, start); if (!sentry->valid_blocks) __set_free(sbi, start); + else + SIT_I(sbi)->written_valid_blocks += + sentry->valid_blocks; } /* set use the current segments */ for (type = CURSEG_HOT_DATA; type <= CURSEG_COLD_NODE; type++) { struct curseg_info *curseg_t = CURSEG_I(sbi, type); + __set_test_and_inuse(sbi, curseg_t->segno); } } @@ -1528,32 +5160,60 @@ static void init_dirty_segmap(struct f2fs_sb_info *sbi) { struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); struct free_segmap_info *free_i = FREE_I(sbi); - unsigned int segno = 0, offset = 0, total_segs = TOTAL_SEGS(sbi); - unsigned short valid_blocks; + unsigned int segno = 0, offset = 0, secno; + block_t valid_blocks, usable_blks_in_seg; while (1) { /* find dirty segment based on free segmap */ - segno = find_next_inuse(free_i, total_segs, offset); - if (segno >= total_segs) + segno = find_next_inuse(free_i, MAIN_SEGS(sbi), offset); + if (segno >= MAIN_SEGS(sbi)) break; offset = segno + 1; - valid_blocks = get_valid_blocks(sbi, segno, 0); - if (valid_blocks >= sbi->blocks_per_seg || !valid_blocks) + valid_blocks = get_valid_blocks(sbi, segno, false); + usable_blks_in_seg = f2fs_usable_blks_in_seg(sbi, segno); + if (valid_blocks == usable_blks_in_seg || !valid_blocks) + continue; + if (valid_blocks > usable_blks_in_seg) { + f2fs_bug_on(sbi, 1); continue; + } mutex_lock(&dirty_i->seglist_lock); __locate_dirty_segment(sbi, segno, DIRTY); mutex_unlock(&dirty_i->seglist_lock); } + + if (!__is_large_section(sbi)) + return; + + mutex_lock(&dirty_i->seglist_lock); + for (segno = 0; segno < MAIN_SEGS(sbi); segno += SEGS_PER_SEC(sbi)) { + valid_blocks = get_valid_blocks(sbi, segno, true); + secno = GET_SEC_FROM_SEG(sbi, segno); + + if (!valid_blocks || valid_blocks == CAP_BLKS_PER_SEC(sbi)) + continue; + if (is_cursec(sbi, secno)) + continue; + set_bit(secno, dirty_i->dirty_secmap); + } + mutex_unlock(&dirty_i->seglist_lock); } static int init_victim_secmap(struct f2fs_sb_info *sbi) { struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); - unsigned int bitmap_size = f2fs_bitmap_size(TOTAL_SECS(sbi)); + unsigned int bitmap_size = f2fs_bitmap_size(MAIN_SECS(sbi)); - dirty_i->victim_secmap = kzalloc(bitmap_size, GFP_KERNEL); + dirty_i->victim_secmap = f2fs_kvzalloc(sbi, bitmap_size, GFP_KERNEL); if (!dirty_i->victim_secmap) return -ENOMEM; + + dirty_i->pinned_secmap = f2fs_kvzalloc(sbi, bitmap_size, GFP_KERNEL); + if (!dirty_i->pinned_secmap) + return -ENOMEM; + + dirty_i->pinned_secmap_cnt = 0; + dirty_i->enable_pin_section = true; return 0; } @@ -1563,25 +5223,455 @@ static int build_dirty_segmap(struct f2fs_sb_info *sbi) unsigned int bitmap_size, i; /* allocate memory for dirty segments list information */ - dirty_i = kzalloc(sizeof(struct dirty_seglist_info), GFP_KERNEL); + dirty_i = f2fs_kzalloc(sbi, sizeof(struct dirty_seglist_info), + GFP_KERNEL); if (!dirty_i) return -ENOMEM; SM_I(sbi)->dirty_info = dirty_i; mutex_init(&dirty_i->seglist_lock); - bitmap_size = f2fs_bitmap_size(TOTAL_SEGS(sbi)); + bitmap_size = f2fs_bitmap_size(MAIN_SEGS(sbi)); for (i = 0; i < NR_DIRTY_TYPE; i++) { - dirty_i->dirty_segmap[i] = kzalloc(bitmap_size, GFP_KERNEL); + dirty_i->dirty_segmap[i] = f2fs_kvzalloc(sbi, bitmap_size, + GFP_KERNEL); if (!dirty_i->dirty_segmap[i]) return -ENOMEM; } + if (__is_large_section(sbi)) { + bitmap_size = f2fs_bitmap_size(MAIN_SECS(sbi)); + dirty_i->dirty_secmap = f2fs_kvzalloc(sbi, + bitmap_size, GFP_KERNEL); + if (!dirty_i->dirty_secmap) + return -ENOMEM; + } + init_dirty_segmap(sbi); return init_victim_secmap(sbi); } +static int sanity_check_curseg(struct f2fs_sb_info *sbi) +{ + int i; + + /* + * In LFS/SSR curseg, .next_blkoff should point to an unused blkaddr; + * In LFS curseg, all blkaddr after .next_blkoff should be unused. + */ + for (i = 0; i < NR_PERSISTENT_LOG; i++) { + struct curseg_info *curseg = CURSEG_I(sbi, i); + struct seg_entry *se = get_seg_entry(sbi, curseg->segno); + unsigned int blkofs = curseg->next_blkoff; + + if (f2fs_sb_has_readonly(sbi) && + i != CURSEG_HOT_DATA && i != CURSEG_HOT_NODE) + continue; + + sanity_check_seg_type(sbi, curseg->seg_type); + + if (curseg->alloc_type != LFS && curseg->alloc_type != SSR) { + f2fs_err(sbi, + "Current segment has invalid alloc_type:%d", + curseg->alloc_type); + f2fs_handle_error(sbi, ERROR_INVALID_CURSEG); + return -EFSCORRUPTED; + } + + if (f2fs_test_bit(blkofs, se->cur_valid_map)) + goto out; + + if (curseg->alloc_type == SSR) + continue; + + for (blkofs += 1; blkofs < BLKS_PER_SEG(sbi); blkofs++) { + if (!f2fs_test_bit(blkofs, se->cur_valid_map)) + continue; +out: + f2fs_err(sbi, + "Current segment's next free block offset is inconsistent with bitmap, logtype:%u, segno:%u, type:%u, next_blkoff:%u, blkofs:%u", + i, curseg->segno, curseg->alloc_type, + curseg->next_blkoff, blkofs); + f2fs_handle_error(sbi, ERROR_INVALID_CURSEG); + return -EFSCORRUPTED; + } + } + return 0; +} + +#ifdef CONFIG_BLK_DEV_ZONED +static int check_zone_write_pointer(struct f2fs_sb_info *sbi, + struct f2fs_dev_info *fdev, + struct blk_zone *zone) +{ + unsigned int zone_segno; + block_t zone_block, valid_block_cnt; + unsigned int log_sectors_per_block = sbi->log_blocksize - SECTOR_SHIFT; + int ret; + unsigned int nofs_flags; + + if (zone->type != BLK_ZONE_TYPE_SEQWRITE_REQ) + return 0; + + zone_block = fdev->start_blk + (zone->start >> log_sectors_per_block); + zone_segno = GET_SEGNO(sbi, zone_block); + + /* + * Skip check of zones cursegs point to, since + * fix_curseg_write_pointer() checks them. + */ + if (zone_segno >= MAIN_SEGS(sbi)) + return 0; + + /* + * Get # of valid block of the zone. + */ + valid_block_cnt = get_valid_blocks(sbi, zone_segno, true); + if (is_cursec(sbi, GET_SEC_FROM_SEG(sbi, zone_segno))) { + f2fs_notice(sbi, "Open zones: valid block[0x%x,0x%x] cond[%s]", + zone_segno, valid_block_cnt, + blk_zone_cond_str(zone->cond)); + return 0; + } + + if ((!valid_block_cnt && zone->cond == BLK_ZONE_COND_EMPTY) || + (valid_block_cnt && zone->cond == BLK_ZONE_COND_FULL)) + return 0; + + if (!valid_block_cnt) { + f2fs_notice(sbi, "Zone without valid block has non-zero write " + "pointer. Reset the write pointer: cond[%s]", + blk_zone_cond_str(zone->cond)); + ret = __f2fs_issue_discard_zone(sbi, fdev->bdev, zone_block, + zone->len >> log_sectors_per_block); + if (ret) + f2fs_err(sbi, "Discard zone failed: %s (errno=%d)", + fdev->path, ret); + return ret; + } + + /* + * If there are valid blocks and the write pointer doesn't match + * with them, we need to report the inconsistency and fill + * the zone till the end to close the zone. This inconsistency + * does not cause write error because the zone will not be + * selected for write operation until it get discarded. + */ + f2fs_notice(sbi, "Valid blocks are not aligned with write " + "pointer: valid block[0x%x,0x%x] cond[%s]", + zone_segno, valid_block_cnt, blk_zone_cond_str(zone->cond)); + + nofs_flags = memalloc_nofs_save(); + ret = blkdev_zone_mgmt(fdev->bdev, REQ_OP_ZONE_FINISH, + zone->start, zone->len); + memalloc_nofs_restore(nofs_flags); + if (ret == -EOPNOTSUPP) { + ret = blkdev_issue_zeroout(fdev->bdev, zone->wp, + zone->len - (zone->wp - zone->start), + GFP_NOFS, 0); + if (ret) + f2fs_err(sbi, "Fill up zone failed: %s (errno=%d)", + fdev->path, ret); + } else if (ret) { + f2fs_err(sbi, "Finishing zone failed: %s (errno=%d)", + fdev->path, ret); + } + + return ret; +} + +static struct f2fs_dev_info *get_target_zoned_dev(struct f2fs_sb_info *sbi, + block_t zone_blkaddr) +{ + int i; + + for (i = 0; i < sbi->s_ndevs; i++) { + if (!bdev_is_zoned(FDEV(i).bdev)) + continue; + if (sbi->s_ndevs == 1 || (FDEV(i).start_blk <= zone_blkaddr && + zone_blkaddr <= FDEV(i).end_blk)) + return &FDEV(i); + } + + return NULL; +} + +static int report_one_zone_cb(struct blk_zone *zone, unsigned int idx, + void *data) +{ + memcpy(data, zone, sizeof(struct blk_zone)); + return 0; +} + +static int do_fix_curseg_write_pointer(struct f2fs_sb_info *sbi, int type) +{ + struct curseg_info *cs = CURSEG_I(sbi, type); + struct f2fs_dev_info *zbd; + struct blk_zone zone; + unsigned int cs_section, wp_segno, wp_blkoff, wp_sector_off; + block_t cs_zone_block, wp_block; + unsigned int log_sectors_per_block = sbi->log_blocksize - SECTOR_SHIFT; + sector_t zone_sector; + int err; + + cs_section = GET_SEC_FROM_SEG(sbi, cs->segno); + cs_zone_block = START_BLOCK(sbi, GET_SEG_FROM_SEC(sbi, cs_section)); + + zbd = get_target_zoned_dev(sbi, cs_zone_block); + if (!zbd) + return 0; + + /* report zone for the sector the curseg points to */ + zone_sector = (sector_t)(cs_zone_block - zbd->start_blk) + << log_sectors_per_block; + err = blkdev_report_zones(zbd->bdev, zone_sector, 1, + report_one_zone_cb, &zone); + if (err != 1) { + f2fs_err(sbi, "Report zone failed: %s errno=(%d)", + zbd->path, err); + return err; + } + + if (zone.type != BLK_ZONE_TYPE_SEQWRITE_REQ) + return 0; + + /* + * When safely unmounted in the previous mount, we could use current + * segments. Otherwise, allocate new sections. + */ + if (is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) { + wp_block = zbd->start_blk + (zone.wp >> log_sectors_per_block); + wp_segno = GET_SEGNO(sbi, wp_block); + wp_blkoff = wp_block - START_BLOCK(sbi, wp_segno); + wp_sector_off = zone.wp & GENMASK(log_sectors_per_block - 1, 0); + + if (cs->segno == wp_segno && cs->next_blkoff == wp_blkoff && + wp_sector_off == 0) + return 0; + + f2fs_notice(sbi, "Unaligned curseg[%d] with write pointer: " + "curseg[0x%x,0x%x] wp[0x%x,0x%x]", type, cs->segno, + cs->next_blkoff, wp_segno, wp_blkoff); + } + + /* Allocate a new section if it's not new. */ + if (cs->next_blkoff || + cs->segno != GET_SEG_FROM_SEC(sbi, GET_ZONE_FROM_SEC(sbi, cs_section))) { + unsigned int old_segno = cs->segno, old_blkoff = cs->next_blkoff; + + f2fs_allocate_new_section(sbi, type, true); + f2fs_notice(sbi, "Assign new section to curseg[%d]: " + "[0x%x,0x%x] -> [0x%x,0x%x]", + type, old_segno, old_blkoff, + cs->segno, cs->next_blkoff); + } + + /* check consistency of the zone curseg pointed to */ + if (check_zone_write_pointer(sbi, zbd, &zone)) + return -EIO; + + /* check newly assigned zone */ + cs_section = GET_SEC_FROM_SEG(sbi, cs->segno); + cs_zone_block = START_BLOCK(sbi, GET_SEG_FROM_SEC(sbi, cs_section)); + + zbd = get_target_zoned_dev(sbi, cs_zone_block); + if (!zbd) + return 0; + + zone_sector = (sector_t)(cs_zone_block - zbd->start_blk) + << log_sectors_per_block; + err = blkdev_report_zones(zbd->bdev, zone_sector, 1, + report_one_zone_cb, &zone); + if (err != 1) { + f2fs_err(sbi, "Report zone failed: %s errno=(%d)", + zbd->path, err); + return err; + } + + if (zone.type != BLK_ZONE_TYPE_SEQWRITE_REQ) + return 0; + + if (zone.wp != zone.start) { + f2fs_notice(sbi, + "New zone for curseg[%d] is not yet discarded. " + "Reset the zone: curseg[0x%x,0x%x]", + type, cs->segno, cs->next_blkoff); + err = __f2fs_issue_discard_zone(sbi, zbd->bdev, cs_zone_block, + zone.len >> log_sectors_per_block); + if (err) { + f2fs_err(sbi, "Discard zone failed: %s (errno=%d)", + zbd->path, err); + return err; + } + } + + return 0; +} + +static int fix_curseg_write_pointer(struct f2fs_sb_info *sbi) +{ + int i, ret; + + for (i = 0; i < NR_PERSISTENT_LOG; i++) { + ret = do_fix_curseg_write_pointer(sbi, i); + if (ret) + return ret; + } + + return 0; +} + +struct check_zone_write_pointer_args { + struct f2fs_sb_info *sbi; + struct f2fs_dev_info *fdev; +}; + +static int check_zone_write_pointer_cb(struct blk_zone *zone, unsigned int idx, + void *data) +{ + struct check_zone_write_pointer_args *args; + + args = (struct check_zone_write_pointer_args *)data; + + return check_zone_write_pointer(args->sbi, args->fdev, zone); +} + +static int check_write_pointer(struct f2fs_sb_info *sbi) +{ + int i, ret; + struct check_zone_write_pointer_args args; + + for (i = 0; i < sbi->s_ndevs; i++) { + if (!bdev_is_zoned(FDEV(i).bdev)) + continue; + + args.sbi = sbi; + args.fdev = &FDEV(i); + ret = blkdev_report_zones(FDEV(i).bdev, 0, BLK_ALL_ZONES, + check_zone_write_pointer_cb, &args); + if (ret < 0) + return ret; + } + + return 0; +} + +int f2fs_check_and_fix_write_pointer(struct f2fs_sb_info *sbi) +{ + int ret; + + if (!f2fs_sb_has_blkzoned(sbi) || f2fs_readonly(sbi->sb) || + f2fs_hw_is_readonly(sbi)) + return 0; + + f2fs_notice(sbi, "Checking entire write pointers"); + ret = fix_curseg_write_pointer(sbi); + if (!ret) + ret = check_write_pointer(sbi); + return ret; +} + +/* + * Return the number of usable blocks in a segment. The number of blocks + * returned is always equal to the number of blocks in a segment for + * segments fully contained within a sequential zone capacity or a + * conventional zone. For segments partially contained in a sequential + * zone capacity, the number of usable blocks up to the zone capacity + * is returned. 0 is returned in all other cases. + */ +static inline unsigned int f2fs_usable_zone_blks_in_seg( + struct f2fs_sb_info *sbi, unsigned int segno) +{ + block_t seg_start, sec_start_blkaddr, sec_cap_blkaddr; + unsigned int secno; + + if (!sbi->unusable_blocks_per_sec) + return BLKS_PER_SEG(sbi); + + secno = GET_SEC_FROM_SEG(sbi, segno); + seg_start = START_BLOCK(sbi, segno); + sec_start_blkaddr = START_BLOCK(sbi, GET_SEG_FROM_SEC(sbi, secno)); + sec_cap_blkaddr = sec_start_blkaddr + CAP_BLKS_PER_SEC(sbi); + + /* + * If segment starts before zone capacity and spans beyond + * zone capacity, then usable blocks are from seg start to + * zone capacity. If the segment starts after the zone capacity, + * then there are no usable blocks. + */ + if (seg_start >= sec_cap_blkaddr) + return 0; + if (seg_start + BLKS_PER_SEG(sbi) > sec_cap_blkaddr) + return sec_cap_blkaddr - seg_start; + + return BLKS_PER_SEG(sbi); +} +#else +int f2fs_check_and_fix_write_pointer(struct f2fs_sb_info *sbi) +{ + return 0; +} + +static inline unsigned int f2fs_usable_zone_blks_in_seg(struct f2fs_sb_info *sbi, + unsigned int segno) +{ + return 0; +} + +#endif +unsigned int f2fs_usable_blks_in_seg(struct f2fs_sb_info *sbi, + unsigned int segno) +{ + if (f2fs_sb_has_blkzoned(sbi)) + return f2fs_usable_zone_blks_in_seg(sbi, segno); + + return BLKS_PER_SEG(sbi); +} + +unsigned int f2fs_usable_segs_in_sec(struct f2fs_sb_info *sbi) +{ + if (f2fs_sb_has_blkzoned(sbi)) + return CAP_SEGS_PER_SEC(sbi); + + return SEGS_PER_SEC(sbi); +} + +unsigned long long f2fs_get_section_mtime(struct f2fs_sb_info *sbi, + unsigned int segno) +{ + unsigned int usable_segs_per_sec = f2fs_usable_segs_in_sec(sbi); + unsigned int secno = 0, start = 0; + unsigned int total_valid_blocks = 0; + unsigned long long mtime = 0; + unsigned int i = 0; + + secno = GET_SEC_FROM_SEG(sbi, segno); + start = GET_SEG_FROM_SEC(sbi, secno); + + if (!__is_large_section(sbi)) { + mtime = get_seg_entry(sbi, start + i)->mtime; + goto out; + } + + for (i = 0; i < usable_segs_per_sec; i++) { + /* for large section, only check the mtime of valid segments */ + struct seg_entry *se = get_seg_entry(sbi, start+i); + + mtime += se->mtime * se->valid_blocks; + total_valid_blocks += se->valid_blocks; + } + + if (total_valid_blocks == 0) + return INVALID_MTIME; + + mtime = div_u64(mtime, total_valid_blocks); +out: + if (unlikely(mtime == INVALID_MTIME)) + mtime -= 1; + return mtime; +} + /* * Update min, max modified time for cost-benefit GC algorithm */ @@ -1590,41 +5680,36 @@ static void init_min_max_mtime(struct f2fs_sb_info *sbi) struct sit_info *sit_i = SIT_I(sbi); unsigned int segno; - mutex_lock(&sit_i->sentry_lock); + down_write(&sit_i->sentry_lock); - sit_i->min_mtime = LLONG_MAX; + sit_i->min_mtime = ULLONG_MAX; - for (segno = 0; segno < TOTAL_SEGS(sbi); segno += sbi->segs_per_sec) { - unsigned int i; + for (segno = 0; segno < MAIN_SEGS(sbi); segno += SEGS_PER_SEC(sbi)) { unsigned long long mtime = 0; - for (i = 0; i < sbi->segs_per_sec; i++) - mtime += get_seg_entry(sbi, segno + i)->mtime; - - mtime = div_u64(mtime, sbi->segs_per_sec); + mtime = f2fs_get_section_mtime(sbi, segno); if (sit_i->min_mtime > mtime) sit_i->min_mtime = mtime; } - sit_i->max_mtime = get_mtime(sbi); - mutex_unlock(&sit_i->sentry_lock); + sit_i->max_mtime = get_mtime(sbi, false); + sit_i->dirty_max_mtime = 0; + up_write(&sit_i->sentry_lock); } -int build_segment_manager(struct f2fs_sb_info *sbi) +int f2fs_build_segment_manager(struct f2fs_sb_info *sbi) { struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi); struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); struct f2fs_sm_info *sm_info; int err; - sm_info = kzalloc(sizeof(struct f2fs_sm_info), GFP_KERNEL); + sm_info = f2fs_kzalloc(sbi, sizeof(struct f2fs_sm_info), GFP_KERNEL); if (!sm_info) return -ENOMEM; /* init sm info */ sbi->sm_info = sm_info; - INIT_LIST_HEAD(&sm_info->wblist_head); - spin_lock_init(&sm_info->wblist_lock); sm_info->seg0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr); sm_info->main_blkaddr = le32_to_cpu(raw_super->main_blkaddr); sm_info->segment_count = le32_to_cpu(raw_super->segment_count); @@ -1632,6 +5717,30 @@ int build_segment_manager(struct f2fs_sb_info *sbi) sm_info->ovp_segments = le32_to_cpu(ckpt->overprov_segment_count); sm_info->main_segments = le32_to_cpu(raw_super->segment_count_main); sm_info->ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr); + sm_info->rec_prefree_segments = sm_info->main_segments * + DEF_RECLAIM_PREFREE_SEGMENTS / 100; + if (sm_info->rec_prefree_segments > DEF_MAX_RECLAIM_PREFREE_SEGMENTS) + sm_info->rec_prefree_segments = DEF_MAX_RECLAIM_PREFREE_SEGMENTS; + + if (!f2fs_lfs_mode(sbi)) + sm_info->ipu_policy = BIT(F2FS_IPU_FSYNC); + sm_info->min_ipu_util = DEF_MIN_IPU_UTIL; + sm_info->min_fsync_blocks = DEF_MIN_FSYNC_BLOCKS; + sm_info->min_seq_blocks = BLKS_PER_SEG(sbi); + sm_info->min_hot_blocks = DEF_MIN_HOT_BLOCKS; + sm_info->min_ssr_sections = reserved_sections(sbi); + + INIT_LIST_HEAD(&sm_info->sit_entry_set); + + init_f2fs_rwsem(&sm_info->curseg_lock); + + err = f2fs_create_flush_cmd_control(sbi); + if (err) + return err; + + err = create_discard_cmd_control(sbi); + if (err) + return err; err = build_sit_info(sbi); if (err) @@ -1644,13 +5753,19 @@ int build_segment_manager(struct f2fs_sb_info *sbi) return err; /* reinit free segmap based on SIT */ - build_sit_entries(sbi); + err = build_sit_entries(sbi); + if (err) + return err; init_free_segmap(sbi); err = build_dirty_segmap(sbi); if (err) return err; + err = sanity_check_curseg(sbi); + if (err) + return err; + init_min_max_mtime(sbi); return 0; } @@ -1661,7 +5776,7 @@ static void discard_dirty_segmap(struct f2fs_sb_info *sbi, struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); mutex_lock(&dirty_i->seglist_lock); - kfree(dirty_i->dirty_segmap[dirty_type]); + kvfree(dirty_i->dirty_segmap[dirty_type]); dirty_i->nr_dirty[dirty_type] = 0; mutex_unlock(&dirty_i->seglist_lock); } @@ -1669,7 +5784,9 @@ static void discard_dirty_segmap(struct f2fs_sb_info *sbi, static void destroy_victim_secmap(struct f2fs_sb_info *sbi) { struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); - kfree(dirty_i->victim_secmap); + + kvfree(dirty_i->pinned_secmap); + kvfree(dirty_i->victim_secmap); } static void destroy_dirty_segmap(struct f2fs_sb_info *sbi) @@ -1684,6 +5801,12 @@ static void destroy_dirty_segmap(struct f2fs_sb_info *sbi) for (i = 0; i < NR_DIRTY_TYPE; i++) discard_dirty_segmap(sbi, i); + if (__is_large_section(sbi)) { + mutex_lock(&dirty_i->seglist_lock); + kvfree(dirty_i->dirty_secmap); + mutex_unlock(&dirty_i->seglist_lock); + } + destroy_victim_secmap(sbi); SM_I(sbi)->dirty_info = NULL; kfree(dirty_i); @@ -1697,48 +5820,57 @@ static void destroy_curseg(struct f2fs_sb_info *sbi) if (!array) return; SM_I(sbi)->curseg_array = NULL; - for (i = 0; i < NR_CURSEG_TYPE; i++) + for (i = 0; i < NR_CURSEG_TYPE; i++) { kfree(array[i].sum_blk); + kfree(array[i].journal); + } kfree(array); } static void destroy_free_segmap(struct f2fs_sb_info *sbi) { struct free_segmap_info *free_i = SM_I(sbi)->free_info; + if (!free_i) return; SM_I(sbi)->free_info = NULL; - kfree(free_i->free_segmap); - kfree(free_i->free_secmap); + kvfree(free_i->free_segmap); + kvfree(free_i->free_secmap); kfree(free_i); } static void destroy_sit_info(struct f2fs_sb_info *sbi) { struct sit_info *sit_i = SIT_I(sbi); - unsigned int start; if (!sit_i) return; - if (sit_i->sentries) { - for (start = 0; start < TOTAL_SEGS(sbi); start++) { - kfree(sit_i->sentries[start].cur_valid_map); - kfree(sit_i->sentries[start].ckpt_valid_map); - } - } - vfree(sit_i->sentries); - vfree(sit_i->sec_entries); - kfree(sit_i->dirty_sentries_bitmap); + if (sit_i->sentries) + kvfree(sit_i->bitmap); + kfree(sit_i->tmp_map); + + kvfree(sit_i->sentries); + kvfree(sit_i->sec_entries); + kvfree(sit_i->dirty_sentries_bitmap); SM_I(sbi)->sit_info = NULL; kfree(sit_i->sit_bitmap); +#ifdef CONFIG_F2FS_CHECK_FS + kfree(sit_i->sit_bitmap_mir); + kvfree(sit_i->invalid_segmap); +#endif kfree(sit_i); } -void destroy_segment_manager(struct f2fs_sb_info *sbi) +void f2fs_destroy_segment_manager(struct f2fs_sb_info *sbi) { struct f2fs_sm_info *sm_info = SM_I(sbi); + + if (!sm_info) + return; + f2fs_destroy_flush_cmd_control(sbi, true); + destroy_discard_cmd_control(sbi); destroy_dirty_segmap(sbi); destroy_curseg(sbi); destroy_free_segmap(sbi); @@ -1746,3 +5878,44 @@ void destroy_segment_manager(struct f2fs_sb_info *sbi) sbi->sm_info = NULL; kfree(sm_info); } + +int __init f2fs_create_segment_manager_caches(void) +{ + discard_entry_slab = f2fs_kmem_cache_create("f2fs_discard_entry", + sizeof(struct discard_entry)); + if (!discard_entry_slab) + goto fail; + + discard_cmd_slab = f2fs_kmem_cache_create("f2fs_discard_cmd", + sizeof(struct discard_cmd)); + if (!discard_cmd_slab) + goto destroy_discard_entry; + + sit_entry_set_slab = f2fs_kmem_cache_create("f2fs_sit_entry_set", + sizeof(struct sit_entry_set)); + if (!sit_entry_set_slab) + goto destroy_discard_cmd; + + revoke_entry_slab = f2fs_kmem_cache_create("f2fs_revoke_entry", + sizeof(struct revoke_entry)); + if (!revoke_entry_slab) + goto destroy_sit_entry_set; + return 0; + +destroy_sit_entry_set: + kmem_cache_destroy(sit_entry_set_slab); +destroy_discard_cmd: + kmem_cache_destroy(discard_cmd_slab); +destroy_discard_entry: + kmem_cache_destroy(discard_entry_slab); +fail: + return -ENOMEM; +} + +void f2fs_destroy_segment_manager_caches(void) +{ + kmem_cache_destroy(sit_entry_set_slab); + kmem_cache_destroy(discard_cmd_slab); + kmem_cache_destroy(discard_entry_slab); + kmem_cache_destroy(revoke_entry_slab); +} |