| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * fs/f2fs/node.c |
| * |
| * Copyright (c) 2012 Samsung Electronics Co., Ltd. |
| * http://www.samsung.com/ |
| */ |
| #include <linux/fs.h> |
| #include <linux/f2fs_fs.h> |
| #include <linux/mpage.h> |
| #include <linux/backing-dev.h> |
| #include <linux/blkdev.h> |
| #include <linux/pagevec.h> |
| #include <linux/swap.h> |
| |
| #include "f2fs.h" |
| #include "node.h" |
| #include "segment.h" |
| #include "xattr.h" |
| #include "trace.h" |
| #include <trace/events/f2fs.h> |
| |
| #define on_f2fs_build_free_nids(nmi) mutex_is_locked(&(nm_i)->build_lock) |
| |
| static struct kmem_cache *nat_entry_slab; |
| static struct kmem_cache *free_nid_slab; |
| static struct kmem_cache *nat_entry_set_slab; |
| static struct kmem_cache *fsync_node_entry_slab; |
| |
| /* |
| * Check whether the given nid is within node id range. |
| */ |
| int f2fs_check_nid_range(struct f2fs_sb_info *sbi, nid_t nid) |
| { |
| if (unlikely(nid < F2FS_ROOT_INO(sbi) || nid >= NM_I(sbi)->max_nid)) { |
| set_sbi_flag(sbi, SBI_NEED_FSCK); |
| f2fs_warn(sbi, "%s: out-of-range nid=%x, run fsck to fix.", |
| __func__, nid); |
| return -EFSCORRUPTED; |
| } |
| return 0; |
| } |
| |
| bool f2fs_available_free_memory(struct f2fs_sb_info *sbi, int type) |
| { |
| struct f2fs_nm_info *nm_i = NM_I(sbi); |
| struct sysinfo val; |
| unsigned long avail_ram; |
| unsigned long mem_size = 0; |
| bool res = false; |
| |
| si_meminfo(&val); |
| |
| /* only uses low memory */ |
| avail_ram = val.totalram - val.totalhigh; |
| |
| /* |
| * give 25%, 25%, 50%, 50%, 50% memory for each components respectively |
| */ |
| if (type == FREE_NIDS) { |
| mem_size = (nm_i->nid_cnt[FREE_NID] * |
| sizeof(struct free_nid)) >> PAGE_SHIFT; |
| res = mem_size < ((avail_ram * nm_i->ram_thresh / 100) >> 2); |
| } else if (type == NAT_ENTRIES) { |
| mem_size = (nm_i->nat_cnt[TOTAL_NAT] * |
| sizeof(struct nat_entry)) >> PAGE_SHIFT; |
| res = mem_size < ((avail_ram * nm_i->ram_thresh / 100) >> 2); |
| if (excess_cached_nats(sbi)) |
| res = false; |
| } else if (type == DIRTY_DENTS) { |
| if (sbi->sb->s_bdi->wb.dirty_exceeded) |
| return false; |
| mem_size = get_pages(sbi, F2FS_DIRTY_DENTS); |
| res = mem_size < ((avail_ram * nm_i->ram_thresh / 100) >> 1); |
| } else if (type == INO_ENTRIES) { |
| int i; |
| |
| for (i = 0; i < MAX_INO_ENTRY; i++) |
| mem_size += sbi->im[i].ino_num * |
| sizeof(struct ino_entry); |
| mem_size >>= PAGE_SHIFT; |
| res = mem_size < ((avail_ram * nm_i->ram_thresh / 100) >> 1); |
| } else if (type == EXTENT_CACHE) { |
| mem_size = (atomic_read(&sbi->total_ext_tree) * |
| sizeof(struct extent_tree) + |
| atomic_read(&sbi->total_ext_node) * |
| sizeof(struct extent_node)) >> PAGE_SHIFT; |
| res = mem_size < ((avail_ram * nm_i->ram_thresh / 100) >> 1); |
| } else if (type == INMEM_PAGES) { |
| /* it allows 20% / total_ram for inmemory pages */ |
| mem_size = get_pages(sbi, F2FS_INMEM_PAGES); |
| res = mem_size < (val.totalram / 5); |
| } else { |
| if (!sbi->sb->s_bdi->wb.dirty_exceeded) |
| return true; |
| } |
| return res; |
| } |
| |
| static void clear_node_page_dirty(struct page *page) |
| { |
| if (PageDirty(page)) { |
| f2fs_clear_page_cache_dirty_tag(page); |
| clear_page_dirty_for_io(page); |
| dec_page_count(F2FS_P_SB(page), F2FS_DIRTY_NODES); |
| } |
| ClearPageUptodate(page); |
| } |
| |
| static struct page *get_current_nat_page(struct f2fs_sb_info *sbi, nid_t nid) |
| { |
| return f2fs_get_meta_page_retry(sbi, current_nat_addr(sbi, nid)); |
| } |
| |
| static struct page *get_next_nat_page(struct f2fs_sb_info *sbi, nid_t nid) |
| { |
| struct page *src_page; |
| struct page *dst_page; |
| pgoff_t dst_off; |
| void *src_addr; |
| void *dst_addr; |
| struct f2fs_nm_info *nm_i = NM_I(sbi); |
| |
| dst_off = next_nat_addr(sbi, current_nat_addr(sbi, nid)); |
| |
| /* get current nat block page with lock */ |
| src_page = get_current_nat_page(sbi, nid); |
| if (IS_ERR(src_page)) |
| return src_page; |
| dst_page = f2fs_grab_meta_page(sbi, dst_off); |
| f2fs_bug_on(sbi, PageDirty(src_page)); |
| |
| src_addr = page_address(src_page); |
| dst_addr = page_address(dst_page); |
| memcpy(dst_addr, src_addr, PAGE_SIZE); |
| set_page_dirty(dst_page); |
| f2fs_put_page(src_page, 1); |
| |
| set_to_next_nat(nm_i, nid); |
| |
| return dst_page; |
| } |
| |
| static struct nat_entry *__alloc_nat_entry(nid_t nid, bool no_fail) |
| { |
| struct nat_entry *new; |
| |
| if (no_fail) |
| new = f2fs_kmem_cache_alloc(nat_entry_slab, GFP_F2FS_ZERO); |
| else |
| new = kmem_cache_alloc(nat_entry_slab, GFP_F2FS_ZERO); |
| if (new) { |
| nat_set_nid(new, nid); |
| nat_reset_flag(new); |
| } |
| return new; |
| } |
| |
| static void __free_nat_entry(struct nat_entry *e) |
| { |
| kmem_cache_free(nat_entry_slab, e); |
| } |
| |
| /* must be locked by nat_tree_lock */ |
| static struct nat_entry *__init_nat_entry(struct f2fs_nm_info *nm_i, |
| struct nat_entry *ne, struct f2fs_nat_entry *raw_ne, bool no_fail) |
| { |
| if (no_fail) |
| f2fs_radix_tree_insert(&nm_i->nat_root, nat_get_nid(ne), ne); |
| else if (radix_tree_insert(&nm_i->nat_root, nat_get_nid(ne), ne)) |
| return NULL; |
| |
| if (raw_ne) |
| node_info_from_raw_nat(&ne->ni, raw_ne); |
| |
| spin_lock(&nm_i->nat_list_lock); |
| list_add_tail(&ne->list, &nm_i->nat_entries); |
| spin_unlock(&nm_i->nat_list_lock); |
| |
| nm_i->nat_cnt[TOTAL_NAT]++; |
| nm_i->nat_cnt[RECLAIMABLE_NAT]++; |
| return ne; |
| } |
| |
| static struct nat_entry *__lookup_nat_cache(struct f2fs_nm_info *nm_i, nid_t n) |
| { |
| struct nat_entry *ne; |
| |
| ne = radix_tree_lookup(&nm_i->nat_root, n); |
| |
| /* for recent accessed nat entry, move it to tail of lru list */ |
| if (ne && !get_nat_flag(ne, IS_DIRTY)) { |
| spin_lock(&nm_i->nat_list_lock); |
| if (!list_empty(&ne->list)) |
| list_move_tail(&ne->list, &nm_i->nat_entries); |
| spin_unlock(&nm_i->nat_list_lock); |
| } |
| |
| return ne; |
| } |
| |
| static unsigned int __gang_lookup_nat_cache(struct f2fs_nm_info *nm_i, |
| nid_t start, unsigned int nr, struct nat_entry **ep) |
| { |
| return radix_tree_gang_lookup(&nm_i->nat_root, (void **)ep, start, nr); |
| } |
| |
| static void __del_from_nat_cache(struct f2fs_nm_info *nm_i, struct nat_entry *e) |
| { |
| radix_tree_delete(&nm_i->nat_root, nat_get_nid(e)); |
| nm_i->nat_cnt[TOTAL_NAT]--; |
| nm_i->nat_cnt[RECLAIMABLE_NAT]--; |
| __free_nat_entry(e); |
| } |
| |
| static struct nat_entry_set *__grab_nat_entry_set(struct f2fs_nm_info *nm_i, |
| struct nat_entry *ne) |
| { |
| nid_t set = NAT_BLOCK_OFFSET(ne->ni.nid); |
| struct nat_entry_set *head; |
| |
| head = radix_tree_lookup(&nm_i->nat_set_root, set); |
| if (!head) { |
| head = f2fs_kmem_cache_alloc(nat_entry_set_slab, GFP_NOFS); |
| |
| INIT_LIST_HEAD(&head->entry_list); |
| INIT_LIST_HEAD(&head->set_list); |
| head->set = set; |
| head->entry_cnt = 0; |
| f2fs_radix_tree_insert(&nm_i->nat_set_root, set, head); |
| } |
| return head; |
| } |
| |
| static void __set_nat_cache_dirty(struct f2fs_nm_info *nm_i, |
| struct nat_entry *ne) |
| { |
| struct nat_entry_set *head; |
| bool new_ne = nat_get_blkaddr(ne) == NEW_ADDR; |
| |
| if (!new_ne) |
| head = __grab_nat_entry_set(nm_i, ne); |
| |
| /* |
| * update entry_cnt in below condition: |
| * 1. update NEW_ADDR to valid block address; |
| * 2. update old block address to new one; |
| */ |
| if (!new_ne && (get_nat_flag(ne, IS_PREALLOC) || |
| !get_nat_flag(ne, IS_DIRTY))) |
| head->entry_cnt++; |
| |
| set_nat_flag(ne, IS_PREALLOC, new_ne); |
| |
| if (get_nat_flag(ne, IS_DIRTY)) |
| goto refresh_list; |
| |
| nm_i->nat_cnt[DIRTY_NAT]++; |
| nm_i->nat_cnt[RECLAIMABLE_NAT]--; |
| set_nat_flag(ne, IS_DIRTY, true); |
| refresh_list: |
| spin_lock(&nm_i->nat_list_lock); |
| if (new_ne) |
| list_del_init(&ne->list); |
| else |
| list_move_tail(&ne->list, &head->entry_list); |
| spin_unlock(&nm_i->nat_list_lock); |
| } |
| |
| static void __clear_nat_cache_dirty(struct f2fs_nm_info *nm_i, |
| struct nat_entry_set *set, struct nat_entry *ne) |
| { |
| spin_lock(&nm_i->nat_list_lock); |
| list_move_tail(&ne->list, &nm_i->nat_entries); |
| spin_unlock(&nm_i->nat_list_lock); |
| |
| set_nat_flag(ne, IS_DIRTY, false); |
| set->entry_cnt--; |
| nm_i->nat_cnt[DIRTY_NAT]--; |
| nm_i->nat_cnt[RECLAIMABLE_NAT]++; |
| } |
| |
| static unsigned int __gang_lookup_nat_set(struct f2fs_nm_info *nm_i, |
| nid_t start, unsigned int nr, struct nat_entry_set **ep) |
| { |
| return radix_tree_gang_lookup(&nm_i->nat_set_root, (void **)ep, |
| start, nr); |
| } |
| |
| bool f2fs_in_warm_node_list(struct f2fs_sb_info *sbi, struct page *page) |
| { |
| return NODE_MAPPING(sbi) == page->mapping && |
| IS_DNODE(page) && is_cold_node(page); |
| } |
| |
| void f2fs_init_fsync_node_info(struct f2fs_sb_info *sbi) |
| { |
| spin_lock_init(&sbi->fsync_node_lock); |
| INIT_LIST_HEAD(&sbi->fsync_node_list); |
| sbi->fsync_seg_id = 0; |
| sbi->fsync_node_num = 0; |
| } |
| |
| static unsigned int f2fs_add_fsync_node_entry(struct f2fs_sb_info *sbi, |
| struct page *page) |
| { |
| struct fsync_node_entry *fn; |
| unsigned long flags; |
| unsigned int seq_id; |
| |
| fn = f2fs_kmem_cache_alloc(fsync_node_entry_slab, GFP_NOFS); |
| |
| get_page(page); |
| fn->page = page; |
| INIT_LIST_HEAD(&fn->list); |
| |
| spin_lock_irqsave(&sbi->fsync_node_lock, flags); |
| list_add_tail(&fn->list, &sbi->fsync_node_list); |
| fn->seq_id = sbi->fsync_seg_id++; |
| seq_id = fn->seq_id; |
| sbi->fsync_node_num++; |
| spin_unlock_irqrestore(&sbi->fsync_node_lock, flags); |
| |
| return seq_id; |
| } |
| |
| void f2fs_del_fsync_node_entry(struct f2fs_sb_info *sbi, struct page *page) |
| { |
| struct fsync_node_entry *fn; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&sbi->fsync_node_lock, flags); |
| list_for_each_entry(fn, &sbi->fsync_node_list, list) { |
| if (fn->page == page) { |
| list_del(&fn->list); |
| sbi->fsync_node_num--; |
| spin_unlock_irqrestore(&sbi->fsync_node_lock, flags); |
| kmem_cache_free(fsync_node_entry_slab, fn); |
| put_page(page); |
| return; |
| } |
| } |
| spin_unlock_irqrestore(&sbi->fsync_node_lock, flags); |
| f2fs_bug_on(sbi, 1); |
| } |
| |
| void f2fs_reset_fsync_node_info(struct f2fs_sb_info *sbi) |
| { |
| unsigned long flags; |
| |
| spin_lock_irqsave(&sbi->fsync_node_lock, flags); |
| sbi->fsync_seg_id = 0; |
| spin_unlock_irqrestore(&sbi->fsync_node_lock, flags); |
| } |
| |
| int f2fs_need_dentry_mark(struct f2fs_sb_info *sbi, nid_t nid) |
| { |
| struct f2fs_nm_info *nm_i = NM_I(sbi); |
| struct nat_entry *e; |
| bool need = false; |
| |
| down_read(&nm_i->nat_tree_lock); |
| e = __lookup_nat_cache(nm_i, nid); |
| if (e) { |
| if (!get_nat_flag(e, IS_CHECKPOINTED) && |
| !get_nat_flag(e, HAS_FSYNCED_INODE)) |
| need = true; |
| } |
| up_read(&nm_i->nat_tree_lock); |
| return need; |
| } |
| |
| bool f2fs_is_checkpointed_node(struct f2fs_sb_info *sbi, nid_t nid) |
| { |
| struct f2fs_nm_info *nm_i = NM_I(sbi); |
| struct nat_entry *e; |
| bool is_cp = true; |
| |
| down_read(&nm_i->nat_tree_lock); |
| e = __lookup_nat_cache(nm_i, nid); |
| if (e && !get_nat_flag(e, IS_CHECKPOINTED)) |
| is_cp = false; |
| up_read(&nm_i->nat_tree_lock); |
| return is_cp; |
| } |
| |
| bool f2fs_need_inode_block_update(struct f2fs_sb_info *sbi, nid_t ino) |
| { |
| struct f2fs_nm_info *nm_i = NM_I(sbi); |
| struct nat_entry *e; |
| bool need_update = true; |
| |
| down_read(&nm_i->nat_tree_lock); |
| e = __lookup_nat_cache(nm_i, ino); |
| if (e && get_nat_flag(e, HAS_LAST_FSYNC) && |
| (get_nat_flag(e, IS_CHECKPOINTED) || |
| get_nat_flag(e, HAS_FSYNCED_INODE))) |
| need_update = false; |
| up_read(&nm_i->nat_tree_lock); |
| return need_update; |
| } |
| |
| /* must be locked by nat_tree_lock */ |
| static void cache_nat_entry(struct f2fs_sb_info *sbi, nid_t nid, |
| struct f2fs_nat_entry *ne) |
| { |
| struct f2fs_nm_info *nm_i = NM_I(sbi); |
| struct nat_entry *new, *e; |
| |
| new = __alloc_nat_entry(nid, false); |
| if (!new) |
| return; |
| |
| down_write(&nm_i->nat_tree_lock); |
| e = __lookup_nat_cache(nm_i, nid); |
| if (!e) |
| e = __init_nat_entry(nm_i, new, ne, false); |
| else |
| f2fs_bug_on(sbi, nat_get_ino(e) != le32_to_cpu(ne->ino) || |
| nat_get_blkaddr(e) != |
| le32_to_cpu(ne->block_addr) || |
| nat_get_version(e) != ne->version); |
| up_write(&nm_i->nat_tree_lock); |
| if (e != new) |
| __free_nat_entry(new); |
| } |
| |
| static void set_node_addr(struct f2fs_sb_info *sbi, struct node_info *ni, |
| block_t new_blkaddr, bool fsync_done) |
| { |
| struct f2fs_nm_info *nm_i = NM_I(sbi); |
| struct nat_entry *e; |
| struct nat_entry *new = __alloc_nat_entry(ni->nid, true); |
| |
| down_write(&nm_i->nat_tree_lock); |
| e = __lookup_nat_cache(nm_i, ni->nid); |
| if (!e) { |
| e = __init_nat_entry(nm_i, new, NULL, true); |
| copy_node_info(&e->ni, ni); |
| f2fs_bug_on(sbi, ni->blk_addr == NEW_ADDR); |
| } else if (new_blkaddr == NEW_ADDR) { |
| /* |
| * when nid is reallocated, |
| * previous nat entry can be remained in nat cache. |
| * So, reinitialize it with new information. |
| */ |
| copy_node_info(&e->ni, ni); |
| f2fs_bug_on(sbi, ni->blk_addr != NULL_ADDR); |
| } |
| /* let's free early to reduce memory consumption */ |
| if (e != new) |
| __free_nat_entry(new); |
| |
| /* sanity check */ |
| f2fs_bug_on(sbi, nat_get_blkaddr(e) != ni->blk_addr); |
| f2fs_bug_on(sbi, nat_get_blkaddr(e) == NULL_ADDR && |
| new_blkaddr == NULL_ADDR); |
| f2fs_bug_on(sbi, nat_get_blkaddr(e) == NEW_ADDR && |
| new_blkaddr == NEW_ADDR); |
| f2fs_bug_on(sbi, __is_valid_data_blkaddr(nat_get_blkaddr(e)) && |
| new_blkaddr == NEW_ADDR); |
| |
| /* increment version no as node is removed */ |
| if (nat_get_blkaddr(e) != NEW_ADDR && new_blkaddr == NULL_ADDR) { |
| unsigned char version = nat_get_version(e); |
| nat_set_version(e, inc_node_version(version)); |
| } |
| |
| /* change address */ |
| nat_set_blkaddr(e, new_blkaddr); |
| if (!__is_valid_data_blkaddr(new_blkaddr)) |
| set_nat_flag(e, IS_CHECKPOINTED, false); |
| __set_nat_cache_dirty(nm_i, e); |
| |
| /* update fsync_mark if its inode nat entry is still alive */ |
| if (ni->nid != ni->ino) |
| e = __lookup_nat_cache(nm_i, ni->ino); |
| if (e) { |
| if (fsync_done && ni->nid == ni->ino) |
| set_nat_flag(e, HAS_FSYNCED_INODE, true); |
| set_nat_flag(e, HAS_LAST_FSYNC, fsync_done); |
| } |
| up_write(&nm_i->nat_tree_lock); |
| } |
| |
| int f2fs_try_to_free_nats(struct f2fs_sb_info *sbi, int nr_shrink) |
| { |
| struct f2fs_nm_info *nm_i = NM_I(sbi); |
| int nr = nr_shrink; |
| |
| if (!down_write_trylock(&nm_i->nat_tree_lock)) |
| return 0; |
| |
| spin_lock(&nm_i->nat_list_lock); |
| while (nr_shrink) { |
| struct nat_entry *ne; |
| |
| if (list_empty(&nm_i->nat_entries)) |
| break; |
| |
| ne = list_first_entry(&nm_i->nat_entries, |
| struct nat_entry, list); |
| list_del(&ne->list); |
| spin_unlock(&nm_i->nat_list_lock); |
| |
| __del_from_nat_cache(nm_i, ne); |
| nr_shrink--; |
| |
| spin_lock(&nm_i->nat_list_lock); |
| } |
| spin_unlock(&nm_i->nat_list_lock); |
| |
| up_write(&nm_i->nat_tree_lock); |
| return nr - nr_shrink; |
| } |
| |
| /* |
| * This function always returns success |
| */ |
| int f2fs_get_node_info(struct f2fs_sb_info *sbi, nid_t nid, |
| struct node_info *ni) |
| { |
| struct f2fs_nm_info *nm_i = NM_I(sbi); |
| struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); |
| struct f2fs_journal *journal = curseg->journal; |
| nid_t start_nid = START_NID(nid); |
| struct f2fs_nat_block *nat_blk; |
| struct page *page = NULL; |
| struct f2fs_nat_entry ne; |
| struct nat_entry *e; |
| pgoff_t index; |
| block_t blkaddr; |
| int i; |
| |
| ni->nid = nid; |
| |
| /* Check nat cache */ |
| down_read(&nm_i->nat_tree_lock); |
| e = __lookup_nat_cache(nm_i, nid); |
| if (e) { |
| ni->ino = nat_get_ino(e); |
| ni->blk_addr = nat_get_blkaddr(e); |
| ni->version = nat_get_version(e); |
| up_read(&nm_i->nat_tree_lock); |
| return 0; |
| } |
| |
| memset(&ne, 0, sizeof(struct f2fs_nat_entry)); |
| |
| /* Check current segment summary */ |
| down_read(&curseg->journal_rwsem); |
| i = f2fs_lookup_journal_in_cursum(journal, NAT_JOURNAL, nid, 0); |
| if (i >= 0) { |
| ne = nat_in_journal(journal, i); |
| node_info_from_raw_nat(ni, &ne); |
| } |
| up_read(&curseg->journal_rwsem); |
| if (i >= 0) { |
| up_read(&nm_i->nat_tree_lock); |
| goto cache; |
| } |
| |
| /* Fill node_info from nat page */ |
| index = current_nat_addr(sbi, nid); |
| up_read(&nm_i->nat_tree_lock); |
| |
| page = f2fs_get_meta_page(sbi, index); |
| if (IS_ERR(page)) |
| return PTR_ERR(page); |
| |
| nat_blk = (struct f2fs_nat_block *)page_address(page); |
| ne = nat_blk->entries[nid - start_nid]; |
| node_info_from_raw_nat(ni, &ne); |
| f2fs_put_page(page, 1); |
| cache: |
| blkaddr = le32_to_cpu(ne.block_addr); |
| if (__is_valid_data_blkaddr(blkaddr) && |
| !f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC_ENHANCE)) |
| return -EFAULT; |
| |
| /* cache nat entry */ |
| cache_nat_entry(sbi, nid, &ne); |
| return 0; |
| } |
| |
| /* |
| * readahead MAX_RA_NODE number of node pages. |
| */ |
| static void f2fs_ra_node_pages(struct page *parent, int start, int n) |
| { |
| struct f2fs_sb_info *sbi = F2FS_P_SB(parent); |
| struct blk_plug plug; |
| int i, end; |
| nid_t nid; |
| |
| blk_start_plug(&plug); |
| |
| /* Then, try readahead for siblings of the desired node */ |
| end = start + n; |
| end = min(end, NIDS_PER_BLOCK); |
| for (i = start; i < end; i++) { |
| nid = get_nid(parent, i, false); |
| f2fs_ra_node_page(sbi, nid); |
| } |
| |
| blk_finish_plug(&plug); |
| } |
| |
| pgoff_t f2fs_get_next_page_offset(struct dnode_of_data *dn, pgoff_t pgofs) |
| { |
| const long direct_index = ADDRS_PER_INODE(dn->inode); |
| const long direct_blks = ADDRS_PER_BLOCK(dn->inode); |
| const long indirect_blks = ADDRS_PER_BLOCK(dn->inode) * NIDS_PER_BLOCK; |
| unsigned int skipped_unit = ADDRS_PER_BLOCK(dn->inode); |
| int cur_level = dn->cur_level; |
| int max_level = dn->max_level; |
| pgoff_t base = 0; |
| |
| if (!dn->max_level) |
| return pgofs + 1; |
| |
| while (max_level-- > cur_level) |
| skipped_unit *= NIDS_PER_BLOCK; |
| |
| switch (dn->max_level) { |
| case 3: |
| base += 2 * indirect_blks; |
| /* fall through */ |
| case 2: |
| base += 2 * direct_blks; |
| /* fall through */ |
| case 1: |
| base += direct_index; |
| break; |
| default: |
| f2fs_bug_on(F2FS_I_SB(dn->inode), 1); |
| } |
| |
| return ((pgofs - base) / skipped_unit + 1) * skipped_unit + base; |
| } |
| |
| /* |
| * The maximum depth is four. |
| * Offset[0] will have raw inode offset. |
| */ |
| static int get_node_path(struct inode *inode, long block, |
| int offset[4], unsigned int noffset[4]) |
| { |
| const long direct_index = ADDRS_PER_INODE(inode); |
| const long direct_blks = ADDRS_PER_BLOCK(inode); |
| const long dptrs_per_blk = NIDS_PER_BLOCK; |
| const long indirect_blks = ADDRS_PER_BLOCK(inode) * NIDS_PER_BLOCK; |
| const long dindirect_blks = indirect_blks * NIDS_PER_BLOCK; |
| int n = 0; |
| int level = 0; |
| |
| noffset[0] = 0; |
| |
| if (block < direct_index) { |
| offset[n] = block; |
| goto got; |
| } |
| block -= direct_index; |
| if (block < direct_blks) { |
| offset[n++] = NODE_DIR1_BLOCK; |
| noffset[n] = 1; |
| offset[n] = block; |
| level = 1; |
| goto got; |
| } |
| block -= direct_blks; |
| if (block < direct_blks) { |
| offset[n++] = NODE_DIR2_BLOCK; |
| noffset[n] = 2; |
| offset[n] = block; |
| level = 1; |
| goto got; |
| } |
| block -= direct_blks; |
| if (block < indirect_blks) { |
| offset[n++] = NODE_IND1_BLOCK; |
| noffset[n] = 3; |
| offset[n++] = block / direct_blks; |
| noffset[n] = 4 + offset[n - 1]; |
| offset[n] = block % direct_blks; |
| level = 2; |
| goto got; |
| } |
| block -= indirect_blks; |
| if (block < indirect_blks) { |
| offset[n++] = NODE_IND2_BLOCK; |
| noffset[n] = 4 + dptrs_per_blk; |
| offset[n++] = block / direct_blks; |
| noffset[n] = 5 + dptrs_per_blk + offset[n - 1]; |
| offset[n] = block % direct_blks; |
| level = 2; |
| goto got; |
| } |
| block -= indirect_blks; |
| if (block < dindirect_blks) { |
| offset[n++] = NODE_DIND_BLOCK; |
| noffset[n] = 5 + (dptrs_per_blk * 2); |
| offset[n++] = block / indirect_blks; |
| noffset[n] = 6 + (dptrs_per_blk * 2) + |
| offset[n - 1] * (dptrs_per_blk + 1); |
| offset[n++] = (block / direct_blks) % dptrs_per_blk; |
| noffset[n] = 7 + (dptrs_per_blk * 2) + |
| offset[n - 2] * (dptrs_per_blk + 1) + |
| offset[n - 1]; |
| offset[n] = block % direct_blks; |
| level = 3; |
| goto got; |
| } else { |
| return -E2BIG; |
| } |
| got: |
| return level; |
| } |
| |
| /* |
| * Caller should call f2fs_put_dnode(dn). |
| * Also, it should grab and release a rwsem by calling f2fs_lock_op() and |
| * f2fs_unlock_op() only if ro is not set RDONLY_NODE. |
| * In the case of RDONLY_NODE, we don't need to care about mutex. |
| */ |
| int f2fs_get_dnode_of_data(struct dnode_of_data *dn, pgoff_t index, int mode) |
| { |
| struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
| struct page *npage[4]; |
| struct page *parent = NULL; |
| int offset[4]; |
| unsigned int noffset[4]; |
| nid_t nids[4]; |
| int level, i = 0; |
| int err = 0; |
| |
| level = get_node_path(dn->inode, index, offset, noffset); |
| if (level < 0) |
| return level; |
| |
| nids[0] = dn->inode->i_ino; |
| npage[0] = dn->inode_page; |
| |
| if (!npage[0]) { |
| npage[0] = f2fs_get_node_page(sbi, nids[0]); |
| if (IS_ERR(npage[0])) |
| return PTR_ERR(npage[0]); |
| } |
| |
| /* if inline_data is set, should not report any block indices */ |
| if (f2fs_has_inline_data(dn->inode) && index) { |
| err = -ENOENT; |
| f2fs_put_page(npage[0], 1); |
| goto release_out; |
| } |
| |
| parent = npage[0]; |
| if (level != 0) |
| nids[1] = get_nid(parent, offset[0], true); |
| dn->inode_page = npage[0]; |
| dn->inode_page_locked = true; |
| |
| /* get indirect or direct nodes */ |
| for (i = 1; i <= level; i++) { |
| bool done = false; |
| |
| if (!nids[i] && mode == ALLOC_NODE) { |
| /* alloc new node */ |
| if (!f2fs_alloc_nid(sbi, &(nids[i]))) { |
| err = -ENOSPC; |
| goto release_pages; |
| } |
| |
| dn->nid = nids[i]; |
| npage[i] = f2fs_new_node_page(dn, noffset[i]); |
| if (IS_ERR(npage[i])) { |
| f2fs_alloc_nid_failed(sbi, nids[i]); |
| err = PTR_ERR(npage[i]); |
| goto release_pages; |
| } |
| |
| set_nid(parent, offset[i - 1], nids[i], i == 1); |
| f2fs_alloc_nid_done(sbi, nids[i]); |
| done = true; |
| } else if (mode == LOOKUP_NODE_RA && i == level && level > 1) { |
| npage[i] = f2fs_get_node_page_ra(parent, offset[i - 1]); |
| if (IS_ERR(npage[i])) { |
| err = PTR_ERR(npage[i]); |
| goto release_pages; |
| } |
| done = true; |
| } |
| if (i == 1) { |
| dn->inode_page_locked = false; |
| unlock_page(parent); |
| } else { |
| f2fs_put_page(parent, 1); |
| } |
| |
| if (!done) { |
| npage[i] = f2fs_get_node_page(sbi, nids[i]); |
| if (IS_ERR(npage[i])) { |
| err = PTR_ERR(npage[i]); |
| f2fs_put_page(npage[0], 0); |
| goto release_out; |
| } |
| } |
| if (i < level) { |
| parent = npage[i]; |
| nids[i + 1] = get_nid(parent, offset[i], false); |
| } |
| } |
| dn->nid = nids[level]; |
| dn->ofs_in_node = offset[level]; |
| dn->node_page = npage[level]; |
| dn->data_blkaddr = datablock_addr(dn->inode, |
| dn->node_page, dn->ofs_in_node); |
| return 0; |
| |
| release_pages: |
| f2fs_put_page(parent, 1); |
| if (i > 1) |
| f2fs_put_page(npage[0], 0); |
| release_out: |
| dn->inode_page = NULL; |
| dn->node_page = NULL; |
| if (err == -ENOENT) { |
| dn->cur_level = i; |
| dn->max_level = level; |
| dn->ofs_in_node = offset[level]; |
| } |
| return err; |
| } |
| |
| static int truncate_node(struct dnode_of_data *dn) |
| { |
| struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
| struct node_info ni; |
| int err; |
| pgoff_t index; |
| |
| err = f2fs_get_node_info(sbi, dn->nid, &ni); |
| if (err) |
| return err; |
| |
| /* Deallocate node address */ |
| f2fs_invalidate_blocks(sbi, ni.blk_addr); |
| dec_valid_node_count(sbi, dn->inode, dn->nid == dn->inode->i_ino); |
| set_node_addr(sbi, &ni, NULL_ADDR, false); |
| |
| if (dn->nid == dn->inode->i_ino) { |
| f2fs_remove_orphan_inode(sbi, dn->nid); |
| dec_valid_inode_count(sbi); |
| f2fs_inode_synced(dn->inode); |
| } |
| |
| clear_node_page_dirty(dn->node_page); |
| set_sbi_flag(sbi, SBI_IS_DIRTY); |
| |
| index = dn->node_page->index; |
| f2fs_put_page(dn->node_page, 1); |
| |
| invalidate_mapping_pages(NODE_MAPPING(sbi), |
| index, index); |
| |
| dn->node_page = NULL; |
| trace_f2fs_truncate_node(dn->inode, dn->nid, ni.blk_addr); |
| |
| return 0; |
| } |
| |
| static int truncate_dnode(struct dnode_of_data *dn) |
| { |
| struct page *page; |
| int err; |
| |
| if (dn->nid == 0) |
| return 1; |
| |
| /* get direct node */ |
| page = f2fs_get_node_page(F2FS_I_SB(dn->inode), dn->nid); |
| if (IS_ERR(page) && PTR_ERR(page) == -ENOENT) |
| return 1; |
| else if (IS_ERR(page)) |
| return PTR_ERR(page); |
| |
| /* Make dnode_of_data for parameter */ |
| dn->node_page = page; |
| dn->ofs_in_node = 0; |
| f2fs_truncate_data_blocks(dn); |
| err = truncate_node(dn); |
| if (err) |
| return err; |
| |
| return 1; |
| } |
| |
| static int truncate_nodes(struct dnode_of_data *dn, unsigned int nofs, |
| int ofs, int depth) |
| { |
| struct dnode_of_data rdn = *dn; |
| struct page *page; |
| struct f2fs_node *rn; |
| nid_t child_nid; |
| unsigned int child_nofs; |
| int freed = 0; |
| int i, ret; |
| |
| if (dn->nid == 0) |
| return NIDS_PER_BLOCK + 1; |
| |
| trace_f2fs_truncate_nodes_enter(dn->inode, dn->nid, dn->data_blkaddr); |
| |
| page = f2fs_get_node_page(F2FS_I_SB(dn->inode), dn->nid); |
| if (IS_ERR(page)) { |
| trace_f2fs_truncate_nodes_exit(dn->inode, PTR_ERR(page)); |
| return PTR_ERR(page); |
| } |
| |
| f2fs_ra_node_pages(page, ofs, NIDS_PER_BLOCK); |
| |
| rn = F2FS_NODE(page); |
| if (depth < 3) { |
| for (i = ofs; i < NIDS_PER_BLOCK; i++, freed++) { |
| child_nid = le32_to_cpu(rn->in.nid[i]); |
| if (child_nid == 0) |
| continue; |
| rdn.nid = child_nid; |
| ret = truncate_dnode(&rdn); |
| if (ret < 0) |
| goto out_err; |
| if (set_nid(page, i, 0, false)) |
| dn->node_changed = true; |
| } |
| } else { |
| child_nofs = nofs + ofs * (NIDS_PER_BLOCK + 1) + 1; |
| for (i = ofs; i < NIDS_PER_BLOCK; i++) { |
| child_nid = le32_to_cpu(rn->in.nid[i]); |
| if (child_nid == 0) { |
| child_nofs += NIDS_PER_BLOCK + 1; |
| continue; |
| } |
| rdn.nid = child_nid; |
| ret = truncate_nodes(&rdn, child_nofs, 0, depth - 1); |
| if (ret == (NIDS_PER_BLOCK + 1)) { |
| if (set_nid(page, i, 0, false)) |
| dn->node_changed = true; |
| child_nofs += ret; |
| } else if (ret < 0 && ret != -ENOENT) { |
| goto out_err; |
| } |
| } |
| freed = child_nofs; |
| } |
| |
| if (!ofs) { |
| /* remove current indirect node */ |
| dn->node_page = page; |
| ret = truncate_node(dn); |
| if (ret) |
| goto out_err; |
| freed++; |
| } else { |
| f2fs_put_page(page, 1); |
| } |
| trace_f2fs_truncate_nodes_exit(dn->inode, freed); |
| return freed; |
| |
| out_err: |
| f2fs_put_page(page, 1); |
| trace_f2fs_truncate_nodes_exit(dn->inode, ret); |
| return ret; |
| } |
| |
| static int truncate_partial_nodes(struct dnode_of_data *dn, |
| struct f2fs_inode *ri, int *offset, int depth) |
| { |
| struct page *pages[2]; |
| nid_t nid[3]; |
| nid_t child_nid; |
| int err = 0; |
| int i; |
| int idx = depth - 2; |
| |
| nid[0] = le32_to_cpu(ri->i_nid[offset[0] - NODE_DIR1_BLOCK]); |
| if (!nid[0]) |
| return 0; |
| |
| /* get indirect nodes in the path */ |
| for (i = 0; i < idx + 1; i++) { |
| /* reference count'll be increased */ |
| pages[i] = f2fs_get_node_page(F2FS_I_SB(dn->inode), nid[i]); |
| if (IS_ERR(pages[i])) { |
| err = PTR_ERR(pages[i]); |
| idx = i - 1; |
| goto fail; |
| } |
| nid[i + 1] = get_nid(pages[i], offset[i + 1], false); |
| } |
| |
| f2fs_ra_node_pages(pages[idx], offset[idx + 1], NIDS_PER_BLOCK); |
| |
| /* free direct nodes linked to a partial indirect node */ |
| for (i = offset[idx + 1]; i < NIDS_PER_BLOCK; i++) { |
| child_nid = get_nid(pages[idx], i, false); |
| if (!child_nid) |
| continue; |
| dn->nid = child_nid; |
| err = truncate_dnode(dn); |
| if (err < 0) |
| goto fail; |
| if (set_nid(pages[idx], i, 0, false)) |
| dn->node_changed = true; |
| } |
| |
| if (offset[idx + 1] == 0) { |
| dn->node_page = pages[idx]; |
| dn->nid = nid[idx]; |
| err = truncate_node(dn); |
| if (err) |
| goto fail; |
| } else { |
| f2fs_put_page(pages[idx], 1); |
| } |
| offset[idx]++; |
| offset[idx + 1] = 0; |
| idx--; |
| fail: |
| for (i = idx; i >= 0; i--) |
| f2fs_put_page(pages[i], 1); |
| |
| trace_f2fs_truncate_partial_nodes(dn->inode, nid, depth, err); |
| |
| return err; |
| } |
| |
| /* |
| * All the block addresses of data and nodes should be nullified. |
| */ |
| int f2fs_truncate_inode_blocks(struct inode *inode, pgoff_t from) |
| { |
| struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| int err = 0, cont = 1; |
| int level, offset[4], noffset[4]; |
| unsigned int nofs = 0; |
| struct f2fs_inode *ri; |
| struct dnode_of_data dn; |
| struct page *page; |
| |
| trace_f2fs_truncate_inode_blocks_enter(inode, from); |
| |
| level = get_node_path(inode, from, offset, noffset); |
| if (level < 0) |
| return level; |
| |
| page = f2fs_get_node_page(sbi, inode->i_ino); |
| if (IS_ERR(page)) { |
| trace_f2fs_truncate_inode_blocks_exit(inode, PTR_ERR(page)); |
| return PTR_ERR(page); |
| } |
| |
| set_new_dnode(&dn, inode, page, NULL, 0); |
| unlock_page(page); |
| |
| ri = F2FS_INODE(page); |
| switch (level) { |
| case 0: |
| case 1: |
| nofs = noffset[1]; |
| break; |
| case 2: |
| nofs = noffset[1]; |
| if (!offset[level - 1]) |
| goto skip_partial; |
| err = truncate_partial_nodes(&dn, ri, offset, level); |
| if (err < 0 && err != -ENOENT) |
| goto fail; |
| nofs += 1 + NIDS_PER_BLOCK; |
| break; |
| case 3: |
| nofs = 5 + 2 * NIDS_PER_BLOCK; |
| if (!offset[level - 1]) |
| goto skip_partial; |
| err = truncate_partial_nodes(&dn, ri, offset, level); |
| if (err < 0 && err != -ENOENT) |
| goto fail; |
| break; |
| default: |
| BUG(); |
| } |
| |
| skip_partial: |
| while (cont) { |
| dn.nid = le32_to_cpu(ri->i_nid[offset[0] - NODE_DIR1_BLOCK]); |
| switch (offset[0]) { |
| case NODE_DIR1_BLOCK: |
| case NODE_DIR2_BLOCK: |
| err = truncate_dnode(&dn); |
| break; |
| |
| case NODE_IND1_BLOCK: |
| case NODE_IND2_BLOCK: |
| err = truncate_nodes(&dn, nofs, offset[1], 2); |
| break; |
| |
| case NODE_DIND_BLOCK: |
| err = truncate_nodes(&dn, nofs, offset[1], 3); |
| cont = 0; |
| break; |
| |
| default: |
| BUG(); |
| } |
| if (err < 0 && err != -ENOENT) |
| goto fail; |
| if (offset[1] == 0 && |
| ri->i_nid[offset[0] - NODE_DIR1_BLOCK]) { |
| lock_page(page); |
| BUG_ON(page->mapping != NODE_MAPPING(sbi)); |
| f2fs_wait_on_page_writeback(page, NODE, true, true); |
| ri->i_nid[offset[0] - NODE_DIR1_BLOCK] = 0; |
| set_page_dirty(page); |
| unlock_page(page); |
| } |
| offset[1] = 0; |
| offset[0]++; |
| nofs += err; |
| } |
| fail: |
| f2fs_put_page(page, 0); |
| trace_f2fs_truncate_inode_blocks_exit(inode, err); |
| return err > 0 ? 0 : err; |
| } |
| |
| /* caller must lock inode page */ |
| int f2fs_truncate_xattr_node(struct inode *inode) |
| { |
| struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| nid_t nid = F2FS_I(inode)->i_xattr_nid; |
| struct dnode_of_data dn; |
| struct page *npage; |
| int err; |
| |
| if (!nid) |
| return 0; |
| |
| npage = f2fs_get_node_page(sbi, nid); |
| if (IS_ERR(npage)) |
| return PTR_ERR(npage); |
| |
| set_new_dnode(&dn, inode, NULL, npage, nid); |
| err = truncate_node(&dn); |
| if (err) { |
| f2fs_put_page(npage, 1); |
| return err; |
| } |
| |
| f2fs_i_xnid_write(inode, 0); |
| |
| return 0; |
| } |
| |
| /* |
| * Caller should grab and release a rwsem by calling f2fs_lock_op() and |
| * f2fs_unlock_op(). |
| */ |
| int f2fs_remove_inode_page(struct inode *inode) |
| { |
| struct dnode_of_data dn; |
| int err; |
| |
| set_new_dnode(&dn, inode, NULL, NULL, inode->i_ino); |
| err = f2fs_get_dnode_of_data(&dn, 0, LOOKUP_NODE); |
| if (err) |
| return err; |
| |
| err = f2fs_truncate_xattr_node(inode); |
| if (err) { |
| f2fs_put_dnode(&dn); |
| return err; |
| } |
| |
| /* remove potential inline_data blocks */ |
| if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || |
| S_ISLNK(inode->i_mode)) |
| f2fs_truncate_data_blocks_range(&dn, 1); |
| |
| /* 0 is possible, after f2fs_new_inode() has failed */ |
| if (unlikely(f2fs_cp_error(F2FS_I_SB(inode)))) { |
| f2fs_put_dnode(&dn); |
| return -EIO; |
| } |
| |
| if (unlikely(inode->i_blocks != 0 && inode->i_blocks != 8)) { |
| f2fs_warn(F2FS_I_SB(inode), "Inconsistent i_blocks, ino:%lu, iblocks:%llu", |
| inode->i_ino, (unsigned long long)inode->i_blocks); |
| set_sbi_flag(F2FS_I_SB(inode), SBI_NEED_FSCK); |
| } |
| |
| /* will put inode & node pages */ |
| err = truncate_node(&dn); |
| if (err) { |
| f2fs_put_dnode(&dn); |
| return err; |
| } |
| return 0; |
| } |
| |
| struct page *f2fs_new_inode_page(struct inode *inode) |
| { |
| struct dnode_of_data dn; |
| |
| /* allocate inode page for new inode */ |
| set_new_dnode(&dn, inode, NULL, NULL, inode->i_ino); |
| |
| /* caller should f2fs_put_page(page, 1); */ |
| return f2fs_new_node_page(&dn, 0); |
| } |
| |
| struct page *f2fs_new_node_page(struct dnode_of_data *dn, unsigned int ofs) |
| { |
| struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
| struct node_info new_ni; |
| struct page *page; |
| int err; |
| |
| if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC))) |
| return ERR_PTR(-EPERM); |
| |
| page = f2fs_grab_cache_page(NODE_MAPPING(sbi), dn->nid, false); |
| if (!page) |
| return ERR_PTR(-ENOMEM); |
| |
| if (unlikely((err = inc_valid_node_count(sbi, dn->inode, !ofs)))) |
| goto fail; |
| |
| #ifdef CONFIG_F2FS_CHECK_FS |
| err = f2fs_get_node_info(sbi, dn->nid, &new_ni); |
| if (err) { |
| dec_valid_node_count(sbi, dn->inode, !ofs); |
| goto fail; |
| } |
| f2fs_bug_on(sbi, new_ni.blk_addr != NULL_ADDR); |
| #endif |
| new_ni.nid = dn->nid; |
| new_ni.ino = dn->inode->i_ino; |
| new_ni.blk_addr = NULL_ADDR; |
| new_ni.flag = 0; |
| new_ni.version = 0; |
| set_node_addr(sbi, &new_ni, NEW_ADDR, false); |
| |
| f2fs_wait_on_page_writeback(page, NODE, true, true); |
| fill_node_footer(page, dn->nid, dn->inode->i_ino, ofs, true); |
| set_cold_node(page, S_ISDIR(dn->inode->i_mode)); |
| if (!PageUptodate(page)) |
| SetPageUptodate(page); |
| if (set_page_dirty(page)) |
| dn->node_changed = true; |
| |
| if (f2fs_has_xattr_block(ofs)) |
| f2fs_i_xnid_write(dn->inode, dn->nid); |
| |
| if (ofs == 0) |
| inc_valid_inode_count(sbi); |
| return page; |
| |
| fail: |
| clear_node_page_dirty(page); |
| f2fs_put_page(page, 1); |
| return ERR_PTR(err); |
| } |
| |
| /* |
| * Caller should do after getting the following values. |
| * 0: f2fs_put_page(page, 0) |
| * LOCKED_PAGE or error: f2fs_put_page(page, 1) |
| */ |
| static int read_node_page(struct page *page, int op_flags) |
| { |
| struct f2fs_sb_info *sbi = F2FS_P_SB(page); |
| struct node_info ni; |
| struct f2fs_io_info fio = { |
| .sbi = sbi, |
| .type = NODE, |
| .op = REQ_OP_READ, |
| .op_flags = op_flags, |
| .page = page, |
| .encrypted_page = NULL, |
| }; |
| int err; |
| |
| if (PageUptodate(page)) { |
| if (!f2fs_inode_chksum_verify(sbi, page)) { |
| ClearPageUptodate(page); |
| return -EFSBADCRC; |
| } |
| return LOCKED_PAGE; |
| } |
| |
| err = f2fs_get_node_info(sbi, page->index, &ni); |
| if (err) |
| return err; |
| |
| if (unlikely(ni.blk_addr == NULL_ADDR) || |
| is_sbi_flag_set(sbi, SBI_IS_SHUTDOWN)) { |
| ClearPageUptodate(page); |
| return -ENOENT; |
| } |
| |
| fio.new_blkaddr = fio.old_blkaddr = ni.blk_addr; |
| return f2fs_submit_page_bio(&fio); |
| } |
| |
| /* |
| * Readahead a node page |
| */ |
| void f2fs_ra_node_page(struct f2fs_sb_info *sbi, nid_t nid) |
| { |
| struct page *apage; |
| int err; |
| |
| if (!nid) |
| return; |
| if (f2fs_check_nid_range(sbi, nid)) |
| return; |
| |
| apage = xa_load(&NODE_MAPPING(sbi)->i_pages, nid); |
| if (apage) |
| return; |
| |
| apage = f2fs_grab_cache_page(NODE_MAPPING(sbi), nid, false); |
| if (!apage) |
| return; |
| |
| err = read_node_page(apage, REQ_RAHEAD); |
| f2fs_put_page(apage, err ? 1 : 0); |
| } |
| |
| static struct page *__get_node_page(struct f2fs_sb_info *sbi, pgoff_t nid, |
| struct page *parent, int start) |
| { |
| struct page *page; |
| int err; |
| |
| if (!nid) |
| return ERR_PTR(-ENOENT); |
| if (f2fs_check_nid_range(sbi, nid)) |
| return ERR_PTR(-EINVAL); |
| repeat: |
| page = f2fs_grab_cache_page(NODE_MAPPING(sbi), nid, false); |
| if (!page) |
| return ERR_PTR(-ENOMEM); |
| |
| err = read_node_page(page, 0); |
| if (err < 0) { |
| f2fs_put_page(page, 1); |
| return ERR_PTR(err); |
| } else if (err == LOCKED_PAGE) { |
| err = 0; |
| goto page_hit; |
| } |
| |
| if (parent) |
| f2fs_ra_node_pages(parent, start + 1, MAX_RA_NODE); |
| |
| lock_page(page); |
| |
| if (unlikely(page->mapping != NODE_MAPPING(sbi))) { |
| f2fs_put_page(page, 1); |
| goto repeat; |
| } |
| |
| if (unlikely(!PageUptodate(page))) { |
| err = -EIO; |
| goto out_err; |
| } |
| |
| if (!f2fs_inode_chksum_verify(sbi, page)) { |
| err = -EFSBADCRC; |
| goto out_err; |
| } |
| page_hit: |
| if(unlikely(nid != nid_of_node(page))) { |
| f2fs_warn(sbi, "inconsistent node block, nid:%lu, node_footer[nid:%u,ino:%u,ofs:%u,cpver:%llu,blkaddr:%u]", |
| nid, nid_of_node(page), ino_of_node(page), |
| ofs_of_node(page), cpver_of_node(page), |
| next_blkaddr_of_node(page)); |
| err = -EINVAL; |
| out_err: |
| ClearPageUptodate(page); |
| f2fs_put_page(page, 1); |
| return ERR_PTR(err); |
| } |
| return page; |
| } |
| |
| struct page *f2fs_get_node_page(struct f2fs_sb_info *sbi, pgoff_t nid) |
| { |
| return __get_node_page(sbi, nid, NULL, 0); |
| } |
| |
| struct page *f2fs_get_node_page_ra(struct page *parent, int start) |
| { |
| struct f2fs_sb_info *sbi = F2FS_P_SB(parent); |
| nid_t nid = get_nid(parent, start, false); |
| |
| return __get_node_page(sbi, nid, parent, start); |
| } |
| |
| static void flush_inline_data(struct f2fs_sb_info *sbi, nid_t ino) |
| { |
| struct inode *inode; |
| struct page *page; |
| int ret; |
| |
| /* should flush inline_data before evict_inode */ |
| inode = ilookup(sbi->sb, ino); |
| if (!inode) |
| return; |
| |
| page = f2fs_pagecache_get_page(inode->i_mapping, 0, |
| FGP_LOCK|FGP_NOWAIT, 0); |
| if (!page) |
| goto iput_out; |
| |
| if (!PageUptodate(page)) |
| goto page_out; |
| |
| if (!PageDirty(page)) |
| goto page_out; |
| |
| if (!clear_page_dirty_for_io(page)) |
| goto page_out; |
| |
| ret = f2fs_write_inline_data(inode, page); |
| inode_dec_dirty_pages(inode); |
| f2fs_remove_dirty_inode(inode); |
| if (ret) |
| set_page_dirty(page); |
| page_out: |
| f2fs_put_page(page, 1); |
| iput_out: |
| iput(inode); |
| } |
| |
| static struct page *last_fsync_dnode(struct f2fs_sb_info *sbi, nid_t ino) |
| { |
| pgoff_t index; |
| struct pagevec pvec; |
| struct page *last_page = NULL; |
| int nr_pages; |
| |
| pagevec_init(&pvec); |
| index = 0; |
| |
| while ((nr_pages = pagevec_lookup_tag(&pvec, NODE_MAPPING(sbi), &index, |
| PAGECACHE_TAG_DIRTY))) { |
| int i; |
| |
| for (i = 0; i < nr_pages; i++) { |
| struct page *page = pvec.pages[i]; |
| |
| if (unlikely(f2fs_cp_error(sbi))) { |
| f2fs_put_page(last_page, 0); |
| pagevec_release(&pvec); |
| return ERR_PTR(-EIO); |
| } |
| |
| if (!IS_DNODE(page) || !is_cold_node(page)) |
| continue; |
| if (ino_of_node(page) != ino) |
| continue; |
| |
| lock_page(page); |
| |
| if (unlikely(page->mapping != NODE_MAPPING(sbi))) { |
| continue_unlock: |
| unlock_page(page); |
| continue; |
| } |
| if (ino_of_node(page) != ino) |
| goto continue_unlock; |
| |
| if (!PageDirty(page)) { |
| /* someone wrote it for us */ |
| goto continue_unlock; |
| } |
| |
| if (last_page) |
| f2fs_put_page(last_page, 0); |
| |
| get_page(page); |
| last_page = page; |
| unlock_page(page); |
| } |
| pagevec_release(&pvec); |
| cond_resched(); |
| } |
| return last_page; |
| } |
| |
| static int __write_node_page(struct page *page, bool atomic, bool *submitted, |
| struct writeback_control *wbc, bool do_balance, |
| enum iostat_type io_type, unsigned int *seq_id) |
| { |
| struct f2fs_sb_info *sbi = F2FS_P_SB(page); |
| nid_t nid; |
| struct node_info ni; |
| struct f2fs_io_info fio = { |
| .sbi = sbi, |
| .ino = ino_of_node(page), |
| .type = NODE, |
| .op = REQ_OP_WRITE, |
| .op_flags = wbc_to_write_flags(wbc), |
| .page = page, |
| .encrypted_page = NULL, |
| .submitted = false, |
| .io_type = io_type, |
| .io_wbc = wbc, |
| }; |
| unsigned int seq; |
| |
| trace_f2fs_writepage(page, NODE); |
| |
| if (unlikely(f2fs_cp_error(sbi))) |
| goto redirty_out; |
| |
| if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) |
| goto redirty_out; |
| |
| if (!is_sbi_flag_set(sbi, SBI_CP_DISABLED) && |
| wbc->sync_mode == WB_SYNC_NONE && |
| IS_DNODE(page) && is_cold_node(page)) |
| goto redirty_out; |
| |
| /* get old block addr of this node page */ |
| nid = nid_of_node(page); |
| f2fs_bug_on(sbi, page->index != nid); |
| |
| if (f2fs_get_node_info(sbi, nid, &ni)) |
| goto redirty_out; |
| |
| if (wbc->for_reclaim) { |
| if (!down_read_trylock(&sbi->node_write)) |
| goto redirty_out; |
| } else { |
| down_read(&sbi->node_write); |
| } |
| |
| /* This page is already truncated */ |
| if (unlikely(ni.blk_addr == NULL_ADDR)) { |
| ClearPageUptodate(page); |
| dec_page_count(sbi, F2FS_DIRTY_NODES); |
| up_read(&sbi->node_write); |
| unlock_page(page); |
| return 0; |
| } |
| |
| if (__is_valid_data_blkaddr(ni.blk_addr) && |
| !f2fs_is_valid_blkaddr(sbi, ni.blk_addr, |
| DATA_GENERIC_ENHANCE)) { |
| up_read(&sbi->node_write); |
| goto redirty_out; |
| } |
| |
| if (atomic && !test_opt(sbi, NOBARRIER)) |
| fio.op_flags |= REQ_PREFLUSH | REQ_FUA; |
| |
| /* should add to global list before clearing PAGECACHE status */ |
| if (f2fs_in_warm_node_list(sbi, page)) { |
| seq = f2fs_add_fsync_node_entry(sbi, page); |
| if (seq_id) |
| *seq_id = seq; |
| } |
| |
| set_page_writeback(page); |
| ClearPageError(page); |
| |
| fio.old_blkaddr = ni.blk_addr; |
| f2fs_do_write_node_page(nid, &fio); |
| set_node_addr(sbi, &ni, fio.new_blkaddr, is_fsync_dnode(page)); |
| dec_page_count(sbi, F2FS_DIRTY_NODES); |
| up_read(&sbi->node_write); |
| |
| if (wbc->for_reclaim) { |
| f2fs_submit_merged_write_cond(sbi, NULL, page, 0, NODE); |
| submitted = NULL; |
| } |
| |
| unlock_page(page); |
| |
| if (unlikely(f2fs_cp_error(sbi))) { |
| f2fs_submit_merged_write(sbi, NODE); |
| submitted = NULL; |
| } |
| if (submitted) |
| *submitted = fio.submitted; |
| |
| if (do_balance) |
| f2fs_balance_fs(sbi, false); |
| return 0; |
| |
| redirty_out: |
| redirty_page_for_writepage(wbc, page); |
| return AOP_WRITEPAGE_ACTIVATE; |
| } |
| |
| int f2fs_move_node_page(struct page *node_page, int gc_type) |
| { |
| int err = 0; |
| |
| if (gc_type == FG_GC) { |
| struct writeback_control wbc = { |
| .sync_mode = WB_SYNC_ALL, |
| .nr_to_write = 1, |
| .for_reclaim = 0, |
| }; |
| |
| f2fs_wait_on_page_writeback(node_page, NODE, true, true); |
| |
| set_page_dirty(node_page); |
| |
| if (!clear_page_dirty_for_io(node_page)) { |
| err = -EAGAIN; |
| goto out_page; |
| } |
| |
| if (__write_node_page(node_page, false, NULL, |
| &wbc, false, FS_GC_NODE_IO, NULL)) { |
| err = -EAGAIN; |
| unlock_page(node_page); |
| } |
| goto release_page; |
| } else { |
| /* set page dirty and write it */ |
| if (!PageWriteback(node_page)) |
| set_page_dirty(node_page); |
| } |
| out_page: |
| unlock_page(node_page); |
| release_page: |
| f2fs_put_page(node_page, 0); |
| return err; |
| } |
| |
| static int f2fs_write_node_page(struct page *page, |
| struct writeback_control *wbc) |
| { |
| return __write_node_page(page, false, NULL, wbc, false, |
| FS_NODE_IO, NULL); |
| } |
| |
| int f2fs_fsync_node_pages(struct f2fs_sb_info *sbi, struct inode *inode, |
| struct writeback_control *wbc, bool atomic, |
| unsigned int *seq_id) |
| { |
| pgoff_t index; |
| struct pagevec pvec; |
| int ret = 0; |
| struct page *last_page = NULL; |
| bool marked = false; |
| nid_t ino = inode->i_ino; |
| int nr_pages; |
| int nwritten = 0; |
| |
| if (atomic) { |
| last_page = last_fsync_dnode(sbi, ino); |
| if (IS_ERR_OR_NULL(last_page)) |
| return PTR_ERR_OR_ZERO(last_page); |
| } |
| retry: |
| pagevec_init(&pvec); |
| index = 0; |
| |
| while ((nr_pages = pagevec_lookup_tag(&pvec, NODE_MAPPING(sbi), &index, |
| PAGECACHE_TAG_DIRTY))) { |
| int i; |
| |
| for (i = 0; i < nr_pages; i++) { |
| struct page *page = pvec.pages[i]; |
| bool submitted = false; |
| |
| if (unlikely(f2fs_cp_error(sbi))) { |
| f2fs_put_page(last_page, 0); |
| pagevec_release(&pvec); |
| ret = -EIO; |
| goto out; |
| } |
| |
| if (!IS_DNODE(page) || !is_cold_node(page)) |
| continue; |
| if (ino_of_node(page) != ino) |
| continue; |
| |
| lock_page(page); |
| |
| if (unlikely(page->mapping != NODE_MAPPING(sbi))) { |
| continue_unlock: |
| unlock_page(page); |
| continue; |
| } |
| if (ino_of_node(page) != ino) |
| goto continue_unlock; |
| |
| if (!PageDirty(page) && page != last_page) { |
| /* someone wrote it for us */ |
| goto continue_unlock; |
| } |
| |
| f2fs_wait_on_page_writeback(page, NODE, true, true); |
| |
| set_fsync_mark(page, 0); |
| set_dentry_mark(page, 0); |
| |
| if (!atomic || page == last_page) { |
| set_fsync_mark(page, 1); |
| if (IS_INODE(page)) { |
| if (is_inode_flag_set(inode, |
| FI_DIRTY_INODE)) |
| f2fs_update_inode(inode, page); |
| set_dentry_mark(page, |
| f2fs_need_dentry_mark(sbi, ino)); |
| } |
| /* may be written by other thread */ |
| if (!PageDirty(page)) |
| set_page_dirty(page); |
| } |
| |
| if (!clear_page_dirty_for_io(page)) |
| goto continue_unlock; |
| |
| ret = __write_node_page(page, atomic && |
| page == last_page, |
| &submitted, wbc, true, |
| FS_NODE_IO, seq_id); |
| if (ret) { |
| unlock_page(page); |
| f2fs_put_page(last_page, 0); |
| break; |
| } else if (submitted) { |
| nwritten++; |
| } |
| |
| if (page == last_page) { |
| f2fs_put_page(page, 0); |
| marked = true; |
| break; |
| } |
| } |
| pagevec_release(&pvec); |
| cond_resched(); |
| |
| if (ret || marked) |
| break; |
| } |
| if (!ret && atomic && !marked) { |
| f2fs_debug(sbi, "Retry to write fsync mark: ino=%u, idx=%lx", |
| ino, last_page->index); |
| lock_page(last_page); |
| f2fs_wait_on_page_writeback(last_page, NODE, true, true); |
| set_page_dirty(last_page); |
| unlock_page(last_page); |
| goto retry; |
| } |
| out: |
| if (nwritten) |
| f2fs_submit_merged_write_cond(sbi, NULL, NULL, ino, NODE); |
| return ret ? -EIO: 0; |
| } |
| |
| static int f2fs_match_ino(struct inode *inode, unsigned long ino, void *data) |
| { |
| struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| bool clean; |
| |
| if (inode->i_ino != ino) |
| return 0; |
| |
| if (!is_inode_flag_set(inode, FI_DIRTY_INODE)) |
| return 0; |
| |
| spin_lock(&sbi->inode_lock[DIRTY_META]); |
| clean = list_empty(&F2FS_I(inode)->gdirty_list); |
| spin_unlock(&sbi->inode_lock[DIRTY_META]); |
| |
| if (clean) |
| return 0; |
| |
| inode = igrab(inode); |
| if (!inode) |
| return 0; |
| return 1; |
| } |
| |
| static bool flush_dirty_inode(struct page *page) |
| { |
| struct f2fs_sb_info *sbi = F2FS_P_SB(page); |
| struct inode *inode; |
| nid_t ino = ino_of_node(page); |
| |
| inode = find_inode_nowait(sbi->sb, ino, f2fs_match_ino, NULL); |
| if (!inode) |
| return false; |
| |
| f2fs_update_inode(inode, page); |
| unlock_page(page); |
| |
| iput(inode); |
| return true; |
| } |
| |
| int f2fs_sync_node_pages(struct f2fs_sb_info *sbi, |
| struct writeback_control *wbc, |
| bool do_balance, enum iostat_type io_type) |
| { |
| pgoff_t index; |
| struct pagevec pvec; |
| int step = 0; |
| int nwritten = 0; |
| int ret = 0; |
| int nr_pages, done = 0; |
| |
| pagevec_init(&pvec); |
| |
| next_step: |
| index = 0; |
| |
| while (!done && (nr_pages = pagevec_lookup_tag(&pvec, |
| NODE_MAPPING(sbi), &index, PAGECACHE_TAG_DIRTY))) { |
| int i; |
| |
| for (i = 0; i < nr_pages; i++) { |
| struct page *page = pvec.pages[i]; |
| bool submitted = false; |
| bool may_dirty = true; |
| |
| /* give a priority to WB_SYNC threads */ |
| if (atomic_read(&sbi->wb_sync_req[NODE]) && |
| wbc->sync_mode == WB_SYNC_NONE) { |
| done = 1; |
| break; |
| } |
| |
| /* |
| * flushing sequence with step: |
| * 0. indirect nodes |
| * 1. dentry dnodes |
| * 2. file dnodes |
| */ |
| if (step == 0 && IS_DNODE(page)) |
| continue; |
| if (step == 1 && (!IS_DNODE(page) || |
| is_cold_node(page))) |
| continue; |
| if (step == 2 && (!IS_DNODE(page) || |
| !is_cold_node(page))) |
| continue; |
| lock_node: |
| if (wbc->sync_mode == WB_SYNC_ALL) |
| lock_page(page); |
| else if (!trylock_page(page)) |
| continue; |
| |
| if (unlikely(page->mapping != NODE_MAPPING(sbi))) { |
| continue_unlock: |
| unlock_page(page); |
| continue; |
| } |
| |
| if (!PageDirty(page)) { |
| /* someone wrote it for us */ |
| goto continue_unlock; |
| } |
| |
| /* flush inline_data */ |
| if (is_inline_node(page)) { |
| clear_inline_node(page); |
| unlock_page(page); |
| flush_inline_data(sbi, ino_of_node(page)); |
| goto lock_node; |
| } |
| |
| /* flush dirty inode */ |
| if (IS_INODE(page) && may_dirty) { |
| may_dirty = false; |
| if (flush_dirty_inode(page)) |
| goto lock_node; |
| } |
| |
| f2fs_wait_on_page_writeback(page, NODE, true, true); |
| |
| if (!clear_page_dirty_for_io(page)) |
| goto continue_unlock; |
| |
| set_fsync_mark(page, 0); |
| set_dentry_mark(page, 0); |
| |
| ret = __write_node_page(page, false, &submitted, |
| wbc, do_balance, io_type, NULL); |
| if (ret) |
| unlock_page(page); |
| else if (submitted) |
| nwritten++; |
| |
| if (--wbc->nr_to_write == 0) |
| break; |
| } |
| pagevec_release(&pvec); |
| cond_resched(); |
| |
| if (wbc->nr_to_write == 0) { |
| step = 2; |
| break; |
| } |
| } |
| |
| if (step < 2) { |
| if (!is_sbi_flag_set(sbi, SBI_CP_DISABLED) && |
| wbc->sync_mode == WB_SYNC_NONE && step == 1) |
| goto out; |
| step++; |
| goto next_step; |
| } |
| out: |
| if (nwritten) |
| f2fs_submit_merged_write(sbi, NODE); |
| |
| if (unlikely(f2fs_cp_error(sbi))) |
| return -EIO; |
| return ret; |
| } |
| |
| int f2fs_wait_on_node_pages_writeback(struct f2fs_sb_info *sbi, |
| unsigned int seq_id) |
| { |
| struct fsync_node_entry *fn; |
| struct page *page; |
| struct list_head *head = &sbi->fsync_node_list; |
| unsigned long flags; |
| unsigned int cur_seq_id = 0; |
| int ret2, ret = 0; |
| |
| while (seq_id && cur_seq_id < seq_id) { |
| spin_lock_irqsave(&sbi->fsync_node_lock, flags); |
| if (list_empty(head)) { |
| spin_unlock_irqrestore(&sbi->fsync_node_lock, flags); |
| break; |
| } |
| fn = list_first_entry(head, struct fsync_node_entry, list); |
| if (fn->seq_id > seq_id) { |
| spin_unlock_irqrestore(&sbi->fsync_node_lock, flags); |
| break; |
| } |
| cur_seq_id = fn->seq_id; |
| page = fn->page; |
| get_page(page); |
| spin_unlock_irqrestore(&sbi->fsync_node_lock, flags); |
| |
| f2fs_wait_on_page_writeback(page, NODE, true, false); |
| if (TestClearPageError(page)) |
| ret = -EIO; |
| |
| put_page(page); |
| |
| if (ret) |
| break; |
| } |
| |
| ret2 = filemap_check_errors(NODE_MAPPING(sbi)); |
| if (!ret) |
| ret = ret2; |
| |
| return ret; |
| } |
| |
| static int f2fs_write_node_pages(struct address_space *mapping, |
| struct writeback_control *wbc) |
| { |
| struct f2fs_sb_info *sbi = F2FS_M_SB(mapping); |
| struct blk_plug plug; |
| long diff; |
| |
| if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) |
| goto skip_write; |
| |
| /* balancing f2fs's metadata in background */ |
| f2fs_balance_fs_bg(sbi); |
| |
| /* collect a number of dirty node pages and write together */ |
| if (wbc->sync_mode != WB_SYNC_ALL && |
| get_pages(sbi, F2FS_DIRTY_NODES) < |
| nr_pages_to_skip(sbi, NODE)) |
| goto skip_write; |
| |
| if (wbc->sync_mode == WB_SYNC_ALL) |
| atomic_inc(&sbi->wb_sync_req[NODE]); |
| else if (atomic_read(&sbi->wb_sync_req[NODE])) |
| goto skip_write; |
| |
| trace_f2fs_writepages(mapping->host, wbc, NODE); |
| |
| diff = nr_pages_to_write(sbi, NODE, wbc); |
| blk_start_plug(&plug); |
| f2fs_sync_node_pages(sbi, wbc, true, FS_NODE_IO); |
| blk_finish_plug(&plug); |
| wbc->nr_to_write = max((long)0, wbc->nr_to_write - diff); |
| |
| if (wbc->sync_mode == WB_SYNC_ALL) |
| atomic_dec(&sbi->wb_sync_req[NODE]); |
| return 0; |
| |
| skip_write: |
| wbc->pages_skipped += get_pages(sbi, F2FS_DIRTY_NODES); |
| trace_f2fs_writepages(mapping->host, wbc, NODE); |
| return 0; |
| } |
| |
| static int f2fs_set_node_page_dirty(struct page *page) |
| { |
| trace_f2fs_set_page_dirty(page, NODE); |
| |
| if (!PageUptodate(page)) |
| SetPageUptodate(page); |
| #ifdef CONFIG_F2FS_CHECK_FS |
| if (IS_INODE(page)) |
| f2fs_inode_chksum_set(F2FS_P_SB(page), page); |
| #endif |
| if (!PageDirty(page)) { |
| __set_page_dirty_nobuffers(page); |
| inc_page_count(F2FS_P_SB(page), F2FS_DIRTY_NODES); |
| f2fs_set_page_private(page, 0); |
| f2fs_trace_pid(page); |
| return 1; |
| } |
| return 0; |
| } |
| |
| /* |
| * Structure of the f2fs node operations |
| */ |
| const struct address_space_operations f2fs_node_aops = { |
| .writepage = f2fs_write_node_page, |
| .writepages = f2fs_write_node_pages, |
| .set_page_dirty = f2fs_set_node_page_dirty, |
| .invalidatepage = f2fs_invalidate_page, |
| .releasepage = f2fs_release_page, |
| #ifdef CONFIG_MIGRATION |
| .migratepage = f2fs_migrate_page, |
| #endif |
| }; |
| |
| static struct free_nid *__lookup_free_nid_list(struct f2fs_nm_info *nm_i, |
| nid_t n) |
| { |
| return radix_tree_lookup(&nm_i->free_nid_root, n); |
| } |
| |
| static int __insert_free_nid(struct f2fs_sb_info *sbi, |
| struct free_nid *i, enum nid_state state) |
| { |
| struct f2fs_nm_info *nm_i = NM_I(sbi); |
| |
| int err = radix_tree_insert(&nm_i->free_nid_root, i->nid, i); |
| if (err) |
| return err; |
| |
| f2fs_bug_on(sbi, state != i->state); |
| nm_i->nid_cnt[state]++; |
| if (state == FREE_NID) |
| list_add_tail(&i->list, &nm_i->free_nid_list); |
| return 0; |
| } |
| |
| static void __remove_free_nid(struct f2fs_sb_info *sbi, |
| struct free_nid *i, enum nid_state state) |
| { |
| struct f2fs_nm_info *nm_i = NM_I(sbi); |
| |
| f2fs_bug_on(sbi, state != i->state); |
| nm_i->nid_cnt[state]--; |
| if (state == FREE_NID) |
| list_del(&i->list); |
| radix_tree_delete(&nm_i->free_nid_root, i->nid); |
| } |
| |
| static void __move_free_nid(struct f2fs_sb_info *sbi, struct free_nid *i, |
| enum nid_state org_state, enum nid_state dst_state) |
| { |
| struct f2fs_nm_info *nm_i = NM_I(sbi); |
| |
| f2fs_bug_on(sbi, org_state != i->state); |
| i->state = dst_state; |
| nm_i->nid_cnt[org_state]--; |
| nm_i->nid_cnt[dst_state]++; |
| |
| switch (dst_state) { |
| case PREALLOC_NID: |
| list_del(&i->list); |
| break; |
| case FREE_NID: |
| list_add_tail(&i->list, &nm_i->free_nid_list); |
| break; |
| default: |
| BUG_ON(1); |
| } |
| } |
| |
| static void update_free_nid_bitmap(struct f2fs_sb_info *sbi, nid_t nid, |
| bool set, bool build) |
| { |
| struct f2fs_nm_info *nm_i = NM_I(sbi); |
| unsigned int nat_ofs = NAT_BLOCK_OFFSET(nid); |
| unsigned int nid_ofs = nid - START_NID(nid); |
| |
| if (!test_bit_le(nat_ofs, nm_i->nat_block_bitmap)) |
| return; |
| |
| if (set) { |
| if (test_bit_le(nid_ofs, nm_i->free_nid_bitmap[nat_ofs])) |
| return; |
| __set_bit_le(nid_ofs, nm_i->free_nid_bitmap[nat_ofs]); |
| nm_i->free_nid_count[nat_ofs]++; |
| } else { |
| if (!test_bit_le(nid_ofs, nm_i->free_nid_bitmap[nat_ofs])) |
| return; |
| __clear_bit_le(nid_ofs, nm_i->free_nid_bitmap[nat_ofs]); |
| if (!build) |
| nm_i->free_nid_count[nat_ofs]--; |
| } |
| } |
| |
| /* return if the nid is recognized as free */ |
| static bool add_free_nid(struct f2fs_sb_info *sbi, |
| nid_t nid, bool build, bool update) |
| { |
| struct f2fs_nm_info *nm_i = NM_I(sbi); |
| struct free_nid *i, *e; |
| struct nat_entry *ne; |
| int err = -EINVAL; |
| bool ret = false; |
| |
| /* 0 nid should not be used */ |
| if (unlikely(nid == 0)) |
| return false; |
| |
| if (unlikely(f2fs_check_nid_range(sbi, nid))) |
| return false; |
| |
| i = f2fs_kmem_cache_alloc(free_nid_slab, GFP_NOFS); |
| i->nid = nid; |
| i->state = FREE_NID; |
| |
| radix_tree_preload(GFP_NOFS | __GFP_NOFAIL); |
| |
| spin_lock(&nm_i->nid_list_lock); |
| |
| if (build) { |
| /* |
| * Thread A Thread B |
| * - f2fs_create |
| * - f2fs_new_inode |
| * - f2fs_alloc_nid |
| * - __insert_nid_to_list(PREALLOC_NID) |
| * - f2fs_balance_fs_bg |
| * - f2fs_build_free_nids |
| * - __f2fs_build_free_nids |
| * - scan_nat_page |
| * - add_free_nid |
| * - __lookup_nat_cache |
| * - f2fs_add_link |
| * - f2fs_init_inode_metadata |
| * - f2fs_new_inode_page |
| * - f2fs_new_node_page |
| * - set_node_addr |
| * - f2fs_alloc_nid_done |
| * - __remove_nid_from_list(PREALLOC_NID) |
| * - __insert_nid_to_list(FREE_NID) |
| */ |
| ne = __lookup_nat_cache(nm_i, nid); |
| if (ne && (!get_nat_flag(ne, IS_CHECKPOINTED) || |
| nat_get_blkaddr(ne) != NULL_ADDR)) |
| goto err_out; |
| |
| e = __lookup_free_nid_list(nm_i, nid); |
| if (e) { |
| if (e->state == FREE_NID) |
| ret = true; |
| goto err_out; |
| } |
| } |
| ret = true; |
| err = __insert_free_nid(sbi, i, FREE_NID); |
| err_out: |
| if (update) { |
| update_free_nid_bitmap(sbi, nid, ret, build); |
| if (!build) |
| nm_i->available_nids++; |
| } |
| spin_unlock(&nm_i->nid_list_lock); |
| radix_tree_preload_end(); |
| |
| if (err) |
| kmem_cache_free(free_nid_slab, i); |
| return ret; |
| } |
| |
| static void remove_free_nid(struct f2fs_sb_info *sbi, nid_t nid) |
| { |
| struct f2fs_nm_info *nm_i = NM_I(sbi); |
| struct free_nid *i; |
| bool need_free = false; |
| |
| spin_lock(&nm_i->nid_list_lock); |
| i = __lookup_free_nid_list(nm_i, nid); |
| if (i && i->state == FREE_NID) { |
| __remove_free_nid(sbi, i, FREE_NID); |
| need_free = true; |
| } |
| spin_unlock(&nm_i->nid_list_lock); |
| |
| if (need_free) |
| kmem_cache_free(free_nid_slab, i); |
| } |
| |
| static int scan_nat_page(struct f2fs_sb_info *sbi, |
| struct page *nat_page, nid_t start_nid) |
| { |
| struct f2fs_nm_info *nm_i = NM_I(sbi); |
| struct f2fs_nat_block *nat_blk = page_address(nat_page); |
| block_t blk_addr; |
| unsigned int nat_ofs = NAT_BLOCK_OFFSET(start_nid); |
| int i; |
| |
| __set_bit_le(nat_ofs, nm_i->nat_block_bitmap); |
| |
| i = start_nid % NAT_ENTRY_PER_BLOCK; |
| |
| for (; i < NAT_ENTRY_PER_BLOCK; i++, start_nid++) { |
| if (unlikely(start_nid >= nm_i->max_nid)) |
| break; |
| |
| blk_addr = le32_to_cpu(nat_blk->entries[i].block_addr); |
| |
| if (blk_addr == NEW_ADDR) |
| return -EINVAL; |
| |
| if (blk_addr == NULL_ADDR) { |
| add_free_nid(sbi, start_nid, true, true); |
| } else { |
| spin_lock(&NM_I(sbi)->nid_list_lock); |
| update_free_nid_bitmap(sbi, start_nid, false, true); |
| spin_unlock(&NM_I(sbi)->nid_list_lock); |
| } |
| } |
| |
| return 0; |
| } |
| |
| static void scan_curseg_cache(struct f2fs_sb_info *sbi) |
| { |
| struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); |
| struct f2fs_journal *journal = curseg->journal; |
| int i; |
| |
| down_read(&curseg->journal_rwsem); |
| for (i = 0; i < nats_in_cursum(journal); i++) { |
| block_t addr; |
| nid_t nid; |
| |
| addr = le32_to_cpu(nat_in_journal(journal, i).block_addr); |
| nid = le32_to_cpu(nid_in_journal(journal, i)); |
| if (addr == NULL_ADDR) |
| add_free_nid(sbi, nid, true, false); |
| else |
| remove_free_nid(sbi, nid); |
| } |
| up_read(&curseg->journal_rwsem); |
| } |
| |
| static void scan_free_nid_bits(struct f2fs_sb_info *sbi) |
| { |
| struct f2fs_nm_info *nm_i = NM_I(sbi); |
| unsigned int i, idx; |
| nid_t nid; |
| |
| down_read(&nm_i->nat_tree_lock); |
| |
| for (i = 0; i < nm_i->nat_blocks; i++) { |
| if (!test_bit_le(i, nm_i->nat_block_bitmap)) |
| continue; |
| if (!nm_i->free_nid_count[i]) |
| continue; |
| for (idx = 0; idx < NAT_ENTRY_PER_BLOCK; idx++) { |
| idx = find_next_bit_le(nm_i->free_nid_bitmap[i], |
| NAT_ENTRY_PER_BLOCK, idx); |
| if (idx >= NAT_ENTRY_PER_BLOCK) |
| break; |
| |
| nid = i * NAT_ENTRY_PER_BLOCK + idx; |
| add_free_nid(sbi, nid, true, false); |
| |
| if (nm_i->nid_cnt[FREE_NID] >= MAX_FREE_NIDS) |
| goto out; |
| } |
| } |
| out: |
| scan_curseg_cache(sbi); |
| |
| up_read(&nm_i->nat_tree_lock); |
| } |
| |
| static int __f2fs_build_free_nids(struct f2fs_sb_info *sbi, |
| bool sync, bool mount) |
| { |
| struct f2fs_nm_info *nm_i = NM_I(sbi); |
| int i = 0, ret; |
| nid_t nid = nm_i->next_scan_nid; |
| |
| if (unlikely(nid >= nm_i->max_nid)) |
| nid = 0; |
| |
| if (unlikely(nid % NAT_ENTRY_PER_BLOCK)) |
| nid = NAT_BLOCK_OFFSET(nid) * NAT_ENTRY_PER_BLOCK; |
| |
| /* Enough entries */ |
| if (nm_i->nid_cnt[FREE_NID] >= NAT_ENTRY_PER_BLOCK) |
| return 0; |
| |
| if (!sync && !f2fs_available_free_memory(sbi, FREE_NIDS)) |
| return 0; |
| |
| if (!mount) { |
| /* try to find free nids in free_nid_bitmap */ |
| scan_free_nid_bits(sbi); |
| |
| if (nm_i->nid_cnt[FREE_NID] >= NAT_ENTRY_PER_BLOCK) |
| return 0; |
| } |
| |
| /* readahead nat pages to be scanned */ |
| f2fs_ra_meta_pages(sbi, NAT_BLOCK_OFFSET(nid), FREE_NID_PAGES, |
| META_NAT, true); |
| |
| down_read(&nm_i->nat_tree_lock); |
| |
| while (1) { |
| if (!test_bit_le(NAT_BLOCK_OFFSET(nid), |
| nm_i->nat_block_bitmap)) { |
| struct page *page = get_current_nat_page(sbi, nid); |
| |
| if (IS_ERR(page)) { |
| ret = PTR_ERR(page); |
| } else { |
| ret = scan_nat_page(sbi, page, nid); |
| f2fs_put_page(page, 1); |
| } |
| |
| if (ret) { |
| up_read(&nm_i->nat_tree_lock); |
| f2fs_err(sbi, "NAT is corrupt, run fsck to fix it"); |
| return ret; |
| } |
| } |
| |
| nid += (NAT_ENTRY_PER_BLOCK - (nid % NAT_ENTRY_PER_BLOCK)); |
| if (unlikely(nid >= nm_i->max_nid)) |
| nid = 0; |
| |
| if (++i >= FREE_NID_PAGES) |
| break; |
| } |
| |
| /* go to the next free nat pages to find free nids abundantly */ |
| nm_i->next_scan_nid = nid; |
| |
| /* find free nids from current sum_pages */ |
| scan_curseg_cache(sbi); |
| |
| up_read(&nm_i->nat_tree_lock); |
| |
| f2fs_ra_meta_pages(sbi, NAT_BLOCK_OFFSET(nm_i->next_scan_nid), |
| nm_i->ra_nid_pages, META_NAT, false); |
| |
| return 0; |
| } |
| |
| int f2fs_build_free_nids(struct f2fs_sb_info *sbi, bool sync, bool mount) |
| { |
| int ret; |
| |
| mutex_lock(&NM_I(sbi)->build_lock); |
| ret = __f2fs_build_free_nids(sbi, sync, mount); |
| mutex_unlock(&NM_I(sbi)->build_lock); |
| |
| return ret; |
| } |
| |
| /* |
| * If this function returns success, caller can obtain a new nid |
| * from second parameter of this function. |
| * The returned nid could be used ino as well as nid when inode is created. |
| */ |
| bool f2fs_alloc_nid(struct f2fs_sb_info *sbi, nid_t *nid) |
| { |
| struct f2fs_nm_info *nm_i = NM_I(sbi); |
| struct free_nid *i = NULL; |
| retry: |
| if (time_to_inject(sbi, FAULT_ALLOC_NID)) { |
| f2fs_show_injection_info(FAULT_ALLOC_NID); |
| return false; |
| } |
| |
| spin_lock(&nm_i->nid_list_lock); |
| |
| if (unlikely(nm_i->available_nids == 0)) { |
| spin_unlock(&nm_i->nid_list_lock); |
| return false; |
| } |
| |
| /* We should not use stale free nids created by f2fs_build_free_nids */ |
| if (nm_i->nid_cnt[FREE_NID] && !on_f2fs_build_free_nids(nm_i)) { |
| f2fs_bug_on(sbi, list_empty(&nm_i->free_nid_list)); |
| i = list_first_entry(&nm_i->free_nid_list, |
| struct free_nid, list); |
| *nid = i->nid; |
| |
| __move_free_nid(sbi, i, FREE_NID, PREALLOC_NID); |
| nm_i->available_nids--; |
| |
| update_free_nid_bitmap(sbi, *nid, false, false); |
| |
| spin_unlock(&nm_i->nid_list_lock); |
| return true; |
| } |
| spin_unlock(&nm_i->nid_list_lock); |
| |
| /* Let's scan nat pages and its caches to get free nids */ |
| if (!f2fs_build_free_nids(sbi, true, false)) |
| goto retry; |
| return false; |
| } |
| |
| /* |
| * f2fs_alloc_nid() should be called prior to this function. |
| */ |
| void f2fs_alloc_nid_done(struct f2fs_sb_info *sbi, nid_t nid) |
| { |
| struct f2fs_nm_info *nm_i = NM_I(sbi); |
| struct free_nid *i; |
| |
| spin_lock(&nm_i->nid_list_lock); |
| i = __lookup_free_nid_list(nm_i, nid); |
| f2fs_bug_on(sbi, !i); |
| __remove_free_nid(sbi, i, PREALLOC_NID); |
| spin_unlock(&nm_i->nid_list_lock); |
| |
| kmem_cache_free(free_nid_slab, i); |
| } |
| |
| /* |
| * f2fs_alloc_nid() should be called prior to this function. |
| */ |
| void f2fs_alloc_nid_failed(struct f2fs_sb_info *sbi, nid_t nid) |
| { |
| struct f2fs_nm_info *nm_i = NM_I(sbi); |
| struct free_nid *i; |
| bool need_free = false; |
| |
| if (!nid) |
| return; |
| |
| spin_lock(&nm_i->nid_list_lock); |
| i = __lookup_free_nid_list(nm_i, nid); |
| f2fs_bug_on(sbi, !i); |
| |
| if (!f2fs_available_free_memory(sbi, FREE_NIDS)) { |
| __remove_free_nid(sbi, i, PREALLOC_NID); |
| need_free = true; |
| } else { |
| __move_free_nid(sbi, i, PREALLOC_NID, FREE_NID); |
| } |
| |
| nm_i->available_nids++; |
| |
| update_free_nid_bitmap(sbi, nid, true, false); |
| |
| spin_unlock(&nm_i->nid_list_lock); |
| |
| if (need_free) |
| kmem_cache_free(free_nid_slab, i); |
| } |
| |
| int f2fs_try_to_free_nids(struct f2fs_sb_info *sbi, int nr_shrink) |
| { |
| struct f2fs_nm_info *nm_i = NM_I(sbi); |
| struct free_nid *i, *next; |
| int nr = nr_shrink; |
| |
| if (nm_i->nid_cnt[FREE_NID] <= MAX_FREE_NIDS) |
| return 0; |
| |
| if (!mutex_trylock(&nm_i->build_lock)) |
| return 0; |
| |
| spin_lock(&nm_i->nid_list_lock); |
| list_for_each_entry_safe(i, next, &nm_i->free_nid_list, list) { |
| if (nr_shrink <= 0 || |
| nm_i->nid_cnt[FREE_NID] <= MAX_FREE_NIDS) |
| break; |
| |
| __remove_free_nid(sbi, i, FREE_NID); |
| kmem_cache_free(free_nid_slab, i); |
| nr_shrink--; |
| } |
| spin_unlock(&nm_i->nid_list_lock); |
| mutex_unlock(&nm_i->build_lock); |
| |
| return nr - nr_shrink; |
| } |
| |
| int f2fs_recover_inline_xattr(struct inode *inode, struct page *page) |
| { |
| void *src_addr, *dst_addr; |
| size_t inline_size; |
| struct page *ipage; |
| struct f2fs_inode *ri; |
| |
| ipage = f2fs_get_node_page(F2FS_I_SB(inode), inode->i_ino); |
| if (IS_ERR(ipage)) |
| return PTR_ERR(ipage); |
| |
| ri = F2FS_INODE(page); |
| if (ri->i_inline & F2FS_INLINE_XATTR) { |
| set_inode_flag(inode, FI_INLINE_XATTR); |
| } else { |
| clear_inode_flag(inode, FI_INLINE_XATTR); |
| goto update_inode; |
| } |
| |
| dst_addr = inline_xattr_addr(inode, ipage); |
| src_addr = inline_xattr_addr(inode, page); |
| inline_size = inline_xattr_size(inode); |
| |
| f2fs_wait_on_page_writeback(ipage, NODE, true, true); |
| memcpy(dst_addr, src_addr, inline_size); |
| update_inode: |
| f2fs_update_inode(inode, ipage); |
| f2fs_put_page(ipage, 1); |
| return 0; |
| } |
| |
| int f2fs_recover_xattr_data(struct inode *inode, struct page *page) |
| { |
| struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| nid_t prev_xnid = F2FS_I(inode)->i_xattr_nid; |
| nid_t new_xnid; |
| struct dnode_of_data dn; |
| struct node_info ni; |
| struct page *xpage; |
| int err; |
| |
| if (!prev_xnid) |
| goto recover_xnid; |
| |
| /* 1: invalidate the previous xattr nid */ |
| err = f2fs_get_node_info(sbi, prev_xnid, &ni); |
| if (err) |
| return err; |
| |
| f2fs_invalidate_blocks(sbi, ni.blk_addr); |
| dec_valid_node_count(sbi, inode, false); |
| set_node_addr(sbi, &ni, NULL_ADDR, false); |
| |
| recover_xnid: |
| /* 2: update xattr nid in inode */ |
| if (!f2fs_alloc_nid(sbi, &new_xnid)) |
| return -ENOSPC; |
| |
| set_new_dnode(&dn, inode, NULL, NULL, new_xnid); |
| xpage = f2fs_new_node_page(&dn, XATTR_NODE_OFFSET); |
| if (IS_ERR(xpage)) { |
| f2fs_alloc_nid_failed(sbi, new_xnid); |
| return PTR_ERR(xpage); |
| } |
| |
| f2fs_alloc_nid_done(sbi, new_xnid); |
| f2fs_update_inode_page(inode); |
| |
| /* 3: update and set xattr node page dirty */ |
| memcpy(F2FS_NODE(xpage), F2FS_NODE(page), VALID_XATTR_BLOCK_SIZE); |
| |
| set_page_dirty(xpage); |
| f2fs_put_page(xpage, 1); |
| |
| return 0; |
| } |
| |
| int f2fs_recover_inode_page(struct f2fs_sb_info *sbi, struct page *page) |
| { |
| struct f2fs_inode *src, *dst; |
| nid_t ino = ino_of_node(page); |
| struct node_info old_ni, new_ni; |
| struct page *ipage; |
| int err; |
| |
| err = f2fs_get_node_info(sbi, ino, &old_ni); |
| if (err) |
| return err; |
| |
| if (unlikely(old_ni.blk_addr != NULL_ADDR)) |
| return -EINVAL; |
| retry: |
| ipage = f2fs_grab_cache_page(NODE_MAPPING(sbi), ino, false); |
| if (!ipage) { |
| congestion_wait(BLK_RW_ASYNC, HZ/50); |
| goto retry; |
| } |
| |
| /* Should not use this inode from free nid list */ |
| remove_free_nid(sbi, ino); |
| |
| if (!PageUptodate(ipage)) |
| SetPageUptodate(ipage); |
| fill_node_footer(ipage, ino, ino, 0, true); |
| set_cold_node(ipage, false); |
| |
| src = F2FS_INODE(page); |
| dst = F2FS_INODE(ipage); |
| |
| memcpy(dst, src, (unsigned long)&src->i_ext - (unsigned long)src); |
| dst->i_size = 0; |
| dst->i_blocks = cpu_to_le64(1); |
| dst->i_links = cpu_to_le32(1); |
| dst->i_xattr_nid = 0; |
| dst->i_inline = src->i_inline & (F2FS_INLINE_XATTR | F2FS_EXTRA_ATTR); |
| if (dst->i_inline & F2FS_EXTRA_ATTR) { |
| dst->i_extra_isize = src->i_extra_isize; |
| |
| if (f2fs_sb_has_flexible_inline_xattr(sbi) && |
| F2FS_FITS_IN_INODE(src, le16_to_cpu(src->i_extra_isize), |
| i_inline_xattr_size)) |
| dst->i_inline_xattr_size = src->i_inline_xattr_size; |
| |
| if (f2fs_sb_has_project_quota(sbi) && |
| F2FS_FITS_IN_INODE(src, le16_to_cpu(src->i_extra_isize), |
| i_projid)) |
| dst->i_projid = src->i_projid; |
| |
| if (f2fs_sb_has_inode_crtime(sbi) && |
| F2FS_FITS_IN_INODE(src, le16_to_cpu(src->i_extra_isize), |
| i_crtime_nsec)) { |
| dst->i_crtime = src->i_crtime; |
| dst->i_crtime_nsec = src->i_crtime_nsec; |
| } |
| } |
| |
| new_ni = old_ni; |
| new_ni.ino = ino; |
| |
| if (unlikely(inc_valid_node_count(sbi, NULL, true))) |
| WARN_ON(1); |
| set_node_addr(sbi, &new_ni, NEW_ADDR, false); |
| inc_valid_inode_count(sbi); |
| set_page_dirty(ipage); |
| f2fs_put_page(ipage, 1); |
| return 0; |
| } |
| |
| int f2fs_restore_node_summary(struct f2fs_sb_info *sbi, |
| unsigned int segno, struct f2fs_summary_block *sum) |
| { |
| struct f2fs_node *rn; |
| struct f2fs_summary *sum_entry; |
| block_t addr; |
| int i, idx, last_offset, nrpages; |
| |
| /* scan the node segment */ |
| last_offset = sbi->blocks_per_seg; |
| addr = START_BLOCK(sbi, segno); |
| sum_entry = &sum->entries[0]; |
| |
| for (i = 0; i < last_offset; i += nrpages, addr += nrpages) { |
| nrpages = min(last_offset - i, BIO_MAX_PAGES); |
| |
| /* readahead node pages */ |
| f2fs_ra_meta_pages(sbi, addr, nrpages, META_POR, true); |
| |
| for (idx = addr; idx < addr + nrpages; idx++) { |
| struct page *page = f2fs_get_tmp_page(sbi, idx); |
| |
| if (IS_ERR(page)) |
| return PTR_ERR(page); |
| |
| rn = F2FS_NODE(page); |
| sum_entry->nid = rn->footer.nid; |
| sum_entry->version = 0; |
| sum_entry->ofs_in_node = 0; |
| sum_entry++; |
| f2fs_put_page(page, 1); |
| } |
| |
| invalidate_mapping_pages(META_MAPPING(sbi), addr, |
| addr + nrpages); |
| } |
| return 0; |
| } |
| |
| static void remove_nats_in_journal(struct f2fs_sb_info *sbi) |
| { |
| struct f2fs_nm_info *nm_i = NM_I(sbi); |
| struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); |
| struct f2fs_journal *journal = curseg->journal; |
| int i; |
| |
| down_write(&curseg->journal_rwsem); |
| for (i = 0; i < nats_in_cursum(journal); i++) { |
| struct nat_entry *ne; |
| struct f2fs_nat_entry raw_ne; |
| nid_t nid = le32_to_cpu(nid_in_journal(journal, i)); |
| |
| if (f2fs_check_nid_range(sbi, nid)) |
| continue; |
| |
| raw_ne = nat_in_journal(journal, i); |
| |
| ne = __lookup_nat_cache(nm_i, nid); |
| if (!ne) { |
| ne = __alloc_nat_entry(nid, true); |
| __init_nat_entry(nm_i, ne, &raw_ne, true); |
| } |
| |
| /* |
| * if a free nat in journal has not been used after last |
| * checkpoint, we should remove it from available nids, |
| * since later we will add it again. |
| */ |
| if (!get_nat_flag(ne, IS_DIRTY) && |
| le32_to_cpu(raw_ne.block_addr) == NULL_ADDR) { |
| spin_lock(&nm_i->nid_list_lock); |
| nm_i->available_nids--; |
| spin_unlock(&nm_i->nid_list_lock); |
| } |
| |
| __set_nat_cache_dirty(nm_i, ne); |
| } |
| update_nats_in_cursum(journal, -i); |
| up_write(&curseg->journal_rwsem); |
| } |
| |
| static void __adjust_nat_entry_set(struct nat_entry_set *nes, |
| struct list_head *head, int max) |
| { |
| struct nat_entry_set *cur; |
| |
| if (nes->entry_cnt >= max) |
| goto add_out; |
| |
| list_for_each_entry(cur, head, set_list) { |
| if (cur->entry_cnt >= nes->entry_cnt) { |
| list_add(&nes->set_list, cur->set_list.prev); |
| return; |
| } |
| } |
| add_out: |
| list_add_tail(&nes->set_list, head); |
| } |
| |
| static void __update_nat_bits(struct f2fs_sb_info *sbi, nid_t start_nid, |
| struct page *page) |
| { |
| struct f2fs_nm_info *nm_i = NM_I(sbi); |
| unsigned int nat_index = start_nid / NAT_ENTRY_PER_BLOCK; |
| struct f2fs_nat_block *nat_blk = page_address(page); |
| int valid = 0; |
| int i = 0; |
| |
| if (!enabled_nat_bits(sbi, NULL)) |
| return; |
| |
| if (nat_index == 0) { |
| valid = 1; |
| i = 1; |
| } |
| for (; i < NAT_ENTRY_PER_BLOCK; i++) { |
| if (le32_to_cpu(nat_blk->entries[i].block_addr) != NULL_ADDR) |
| valid++; |
| } |
| if (valid == 0) { |
| __set_bit_le(nat_index, nm_i->empty_nat_bits); |
| __clear_bit_le(nat_index, nm_i->full_nat_bits); |
| return; |
| } |
| |
| __clear_bit_le(nat_index, nm_i->empty_nat_bits); |
| if (valid == NAT_ENTRY_PER_BLOCK) |
| __set_bit_le(nat_index, nm_i->full_nat_bits); |
| else |
| __clear_bit_le(nat_index, nm_i->full_nat_bits); |
| } |
| |
| static int __flush_nat_entry_set(struct f2fs_sb_info *sbi, |
| struct nat_entry_set *set, struct cp_control *cpc) |
| { |
| struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); |
| struct f2fs_journal *journal = curseg->journal; |
| nid_t start_nid = set->set * NAT_ENTRY_PER_BLOCK; |
| bool to_journal = true; |
| struct f2fs_nat_block *nat_blk; |
| struct nat_entry *ne, *cur; |
| struct page *page = NULL; |
| |
| /* |
| * there are two steps to flush nat entries: |
| * #1, flush nat entries to journal in current hot data summary block. |
| * #2, flush nat entries to nat page. |
| */ |
| if (enabled_nat_bits(sbi, cpc) || |
| !__has_cursum_space(journal, set->entry_cnt, NAT_JOURNAL)) |
| to_journal = false; |
| |
| if (to_journal) { |
| down_write(&curseg->journal_rwsem); |
| } else { |
| page = get_next_nat_page(sbi, start_nid); |
| if (IS_ERR(page)) |
| return PTR_ERR(page); |
| |
| nat_blk = page_address(page); |
| f2fs_bug_on(sbi, !nat_blk); |
| } |
| |
| /* flush dirty nats in nat entry set */ |
| list_for_each_entry_safe(ne, cur, &set->entry_list, list) { |
| struct f2fs_nat_entry *raw_ne; |
| nid_t nid = nat_get_nid(ne); |
| int offset; |
| |
| f2fs_bug_on(sbi, nat_get_blkaddr(ne) == NEW_ADDR); |
| |
| if (to_journal) { |
| offset = f2fs_lookup_journal_in_cursum(journal, |
| NAT_JOURNAL, nid, 1); |
| f2fs_bug_on(sbi, offset < 0); |
| raw_ne = &nat_in_journal(journal, offset); |
| nid_in_journal(journal, offset) = cpu_to_le32(nid); |
| } else { |
| raw_ne = &nat_blk->entries[nid - start_nid]; |
| } |
| raw_nat_from_node_info(raw_ne, &ne->ni); |
| nat_reset_flag(ne); |
| __clear_nat_cache_dirty(NM_I(sbi), set, ne); |
| if (nat_get_blkaddr(ne) == NULL_ADDR) { |
| add_free_nid(sbi, nid, false, true); |
| } else { |
| spin_lock(&NM_I(sbi)->nid_list_lock); |
| update_free_nid_bitmap(sbi, nid, false, false); |
| spin_unlock(&NM_I(sbi)->nid_list_lock); |
| } |
| } |
| |
| if (to_journal) { |
| up_write(&curseg->journal_rwsem); |
| } else { |
| __update_nat_bits(sbi, start_nid, page); |
| f2fs_put_page(page, 1); |
| } |
| |
| /* Allow dirty nats by node block allocation in write_begin */ |
| if (!set->entry_cnt) { |
| radix_tree_delete(&NM_I(sbi)->nat_set_root, set->set); |
| kmem_cache_free(nat_entry_set_slab, set); |
| } |
| return 0; |
| } |
| |
| /* |
| * This function is called during the checkpointing process. |
| */ |
| int f2fs_flush_nat_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc) |
| { |
| struct f2fs_nm_info *nm_i = NM_I(sbi); |
| struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); |
| struct f2fs_journal *journal = curseg->journal; |
| struct nat_entry_set *setvec[SETVEC_SIZE]; |
| struct nat_entry_set *set, *tmp; |
| unsigned int found; |
| nid_t set_idx = 0; |
| LIST_HEAD(sets); |
| int err = 0; |
| |
| /* |
| * during unmount, let's flush nat_bits before checking |
| * nat_cnt[DIRTY_NAT]. |
| */ |
| if (enabled_nat_bits(sbi, cpc)) { |
| down_write(&nm_i->nat_tree_lock); |
| remove_nats_in_journal(sbi); |
| up_write(&nm_i->nat_tree_lock); |
| } |
| |
| if (!nm_i->nat_cnt[DIRTY_NAT]) |
| return 0; |
| |
| down_write(&nm_i->nat_tree_lock); |
| |
| /* |
| * if there are no enough space in journal to store dirty nat |
| * entries, remove all entries from journal and merge them |
| * into nat entry set. |
| */ |
| if (enabled_nat_bits(sbi, cpc) || |
| !__has_cursum_space(journal, |
| nm_i->nat_cnt[DIRTY_NAT], NAT_JOURNAL)) |
| remove_nats_in_journal(sbi); |
| |
| while ((found = __gang_lookup_nat_set(nm_i, |
| set_idx, SETVEC_SIZE, setvec))) { |
| unsigned idx; |
| set_idx = setvec[found - 1]->set + 1; |
| for (idx = 0; idx < found; idx++) |
| __adjust_nat_entry_set(setvec[idx], &sets, |
| MAX_NAT_JENTRIES(journal)); |
| } |
| |
| /* flush dirty nats in nat entry set */ |
| list_for_each_entry_safe(set, tmp, &sets, set_list) { |
| err = __flush_nat_entry_set(sbi, set, cpc); |
| if (err) |
| break; |
| } |
| |
| up_write(&nm_i->nat_tree_lock); |
| /* Allow dirty nats by node block allocation in write_begin */ |
| |
| return err; |
| } |
| |
| static int __get_nat_bitmaps(struct f2fs_sb_info *sbi) |
| { |
| struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); |
| struct f2fs_nm_info *nm_i = NM_I(sbi); |
| unsigned int nat_bits_bytes = nm_i->nat_blocks / BITS_PER_BYTE; |
| unsigned int i; |
| __u64 cp_ver = cur_cp_version(ckpt); |
| block_t nat_bits_addr; |
| |
| if (!enabled_nat_bits(sbi, NULL)) |
| return 0; |
| |
| nm_i->nat_bits_blocks = F2FS_BLK_ALIGN((nat_bits_bytes << 1) + 8); |
| nm_i->nat_bits = f2fs_kvzalloc(sbi, |
| nm_i->nat_bits_blocks << F2FS_BLKSIZE_BITS, GFP_KERNEL); |
| if (!nm_i->nat_bits) |
| return -ENOMEM; |
| |
| nat_bits_addr = __start_cp_addr(sbi) + sbi->blocks_per_seg - |
| nm_i->nat_bits_blocks; |
| for (i = 0; i < nm_i->nat_bits_blocks; i++) { |
| struct page *page; |
| |
| page = f2fs_get_meta_page(sbi, nat_bits_addr++); |
| if (IS_ERR(page)) |
| return PTR_ERR(page); |
| |
| memcpy(nm_i->nat_bits + (i << F2FS_BLKSIZE_BITS), |
| page_address(page), F2FS_BLKSIZE); |
| f2fs_put_page(page, 1); |
| } |
| |
| cp_ver |= (cur_cp_crc(ckpt) << 32); |
| if (cpu_to_le64(cp_ver) != *(__le64 *)nm_i->nat_bits)<
|