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fs/f2fs/extent_cache.c
20.5 KB
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// SPDX-License-Identifier: GPL-2.0 |
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/* * f2fs extent cache support * * Copyright (c) 2015 Motorola Mobility * Copyright (c) 2015 Samsung Electronics * Authors: Jaegeuk Kim <jaegeuk@kernel.org> * Chao Yu <chao2.yu@samsung.com> |
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*/ #include <linux/fs.h> #include <linux/f2fs_fs.h> #include "f2fs.h" #include "node.h" #include <trace/events/f2fs.h> |
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static struct rb_entry *__lookup_rb_tree_fast(struct rb_entry *cached_re, unsigned int ofs) { if (cached_re) { if (cached_re->ofs <= ofs && cached_re->ofs + cached_re->len > ofs) { return cached_re; } } return NULL; } |
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static struct rb_entry *__lookup_rb_tree_slow(struct rb_root_cached *root, |
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unsigned int ofs) { |
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struct rb_node *node = root->rb_root.rb_node; |
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struct rb_entry *re; while (node) { re = rb_entry(node, struct rb_entry, rb_node); if (ofs < re->ofs) node = node->rb_left; else if (ofs >= re->ofs + re->len) node = node->rb_right; else return re; } return NULL; } |
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struct rb_entry *f2fs_lookup_rb_tree(struct rb_root_cached *root, |
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struct rb_entry *cached_re, unsigned int ofs) { struct rb_entry *re; re = __lookup_rb_tree_fast(cached_re, ofs); if (!re) return __lookup_rb_tree_slow(root, ofs); return re; } |
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struct rb_node **f2fs_lookup_rb_tree_ext(struct f2fs_sb_info *sbi, struct rb_root_cached *root, struct rb_node **parent, unsigned long long key, bool *leftmost) { struct rb_node **p = &root->rb_root.rb_node; struct rb_entry *re; while (*p) { *parent = *p; re = rb_entry(*parent, struct rb_entry, rb_node); if (key < re->key) { p = &(*p)->rb_left; } else { p = &(*p)->rb_right; *leftmost = false; } } return p; } |
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struct rb_node **f2fs_lookup_rb_tree_for_insert(struct f2fs_sb_info *sbi, |
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struct rb_root_cached *root, struct rb_node **parent, unsigned int ofs, bool *leftmost) |
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{ |
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struct rb_node **p = &root->rb_root.rb_node; |
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struct rb_entry *re; while (*p) { *parent = *p; re = rb_entry(*parent, struct rb_entry, rb_node); |
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if (ofs < re->ofs) { |
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p = &(*p)->rb_left; |
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} else if (ofs >= re->ofs + re->len) { |
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p = &(*p)->rb_right; |
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*leftmost = false; } else { |
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f2fs_bug_on(sbi, 1); |
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} |
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} return p; } /* * lookup rb entry in position of @ofs in rb-tree, * if hit, return the entry, otherwise, return NULL * @prev_ex: extent before ofs * @next_ex: extent after ofs * @insert_p: insert point for new extent at ofs * in order to simpfy the insertion after. * tree must stay unchanged between lookup and insertion. */ |
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struct rb_entry *f2fs_lookup_rb_tree_ret(struct rb_root_cached *root, |
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struct rb_entry *cached_re, unsigned int ofs, struct rb_entry **prev_entry, struct rb_entry **next_entry, struct rb_node ***insert_p, |
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struct rb_node **insert_parent, |
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bool force, bool *leftmost) |
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{ |
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struct rb_node **pnode = &root->rb_root.rb_node; |
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struct rb_node *parent = NULL, *tmp_node; struct rb_entry *re = cached_re; *insert_p = NULL; *insert_parent = NULL; *prev_entry = NULL; *next_entry = NULL; |
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if (RB_EMPTY_ROOT(&root->rb_root)) |
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return NULL; if (re) { if (re->ofs <= ofs && re->ofs + re->len > ofs) goto lookup_neighbors; } |
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if (leftmost) *leftmost = true; |
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while (*pnode) { parent = *pnode; re = rb_entry(*pnode, struct rb_entry, rb_node); |
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if (ofs < re->ofs) { |
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pnode = &(*pnode)->rb_left; |
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} else if (ofs >= re->ofs + re->len) { |
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pnode = &(*pnode)->rb_right; |
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if (leftmost) *leftmost = false; } else { |
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goto lookup_neighbors; |
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} |
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} *insert_p = pnode; *insert_parent = parent; re = rb_entry(parent, struct rb_entry, rb_node); tmp_node = parent; if (parent && ofs > re->ofs) tmp_node = rb_next(parent); *next_entry = rb_entry_safe(tmp_node, struct rb_entry, rb_node); tmp_node = parent; if (parent && ofs < re->ofs) tmp_node = rb_prev(parent); *prev_entry = rb_entry_safe(tmp_node, struct rb_entry, rb_node); return NULL; lookup_neighbors: |
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if (ofs == re->ofs || force) { |
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/* lookup prev node for merging backward later */ tmp_node = rb_prev(&re->rb_node); *prev_entry = rb_entry_safe(tmp_node, struct rb_entry, rb_node); } |
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if (ofs == re->ofs + re->len - 1 || force) { |
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/* lookup next node for merging frontward later */ tmp_node = rb_next(&re->rb_node); *next_entry = rb_entry_safe(tmp_node, struct rb_entry, rb_node); } return re; } |
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bool f2fs_check_rb_tree_consistence(struct f2fs_sb_info *sbi, |
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struct rb_root_cached *root, bool check_key) |
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{ #ifdef CONFIG_F2FS_CHECK_FS |
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struct rb_node *cur = rb_first_cached(root), *next; |
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struct rb_entry *cur_re, *next_re; if (!cur) return true; while (cur) { next = rb_next(cur); if (!next) return true; cur_re = rb_entry(cur, struct rb_entry, rb_node); next_re = rb_entry(next, struct rb_entry, rb_node); |
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if (check_key) { if (cur_re->key > next_re->key) { f2fs_info(sbi, "inconsistent rbtree, " "cur(%llu) next(%llu)", cur_re->key, next_re->key); return false; } goto next; } |
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if (cur_re->ofs + cur_re->len > next_re->ofs) { |
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f2fs_info(sbi, "inconsistent rbtree, cur(%u, %u) next(%u, %u)", cur_re->ofs, cur_re->len, next_re->ofs, next_re->len); |
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return false; } |
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next: |
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cur = next; } #endif return true; } |
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static struct kmem_cache *extent_tree_slab; static struct kmem_cache *extent_node_slab; static struct extent_node *__attach_extent_node(struct f2fs_sb_info *sbi, struct extent_tree *et, struct extent_info *ei, |
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struct rb_node *parent, struct rb_node **p, bool leftmost) |
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{ struct extent_node *en; en = kmem_cache_alloc(extent_node_slab, GFP_ATOMIC); if (!en) return NULL; en->ei = *ei; INIT_LIST_HEAD(&en->list); |
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en->et = et; |
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rb_link_node(&en->rb_node, parent, p); |
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rb_insert_color_cached(&en->rb_node, &et->root, leftmost); |
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atomic_inc(&et->node_cnt); |
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atomic_inc(&sbi->total_ext_node); return en; } static void __detach_extent_node(struct f2fs_sb_info *sbi, struct extent_tree *et, struct extent_node *en) { |
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rb_erase_cached(&en->rb_node, &et->root); |
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atomic_dec(&et->node_cnt); |
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atomic_dec(&sbi->total_ext_node); if (et->cached_en == en) et->cached_en = NULL; |
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kmem_cache_free(extent_node_slab, en); } /* * Flow to release an extent_node: * 1. list_del_init * 2. __detach_extent_node * 3. kmem_cache_free. */ static void __release_extent_node(struct f2fs_sb_info *sbi, struct extent_tree *et, struct extent_node *en) { spin_lock(&sbi->extent_lock); |
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f2fs_bug_on(sbi, list_empty(&en->list)); list_del_init(&en->list); |
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spin_unlock(&sbi->extent_lock); __detach_extent_node(sbi, et, en); |
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} static struct extent_tree *__grab_extent_tree(struct inode *inode) { struct f2fs_sb_info *sbi = F2FS_I_SB(inode); struct extent_tree *et; nid_t ino = inode->i_ino; |
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mutex_lock(&sbi->extent_tree_lock); |
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et = radix_tree_lookup(&sbi->extent_tree_root, ino); if (!et) { et = f2fs_kmem_cache_alloc(extent_tree_slab, GFP_NOFS); f2fs_radix_tree_insert(&sbi->extent_tree_root, ino, et); memset(et, 0, sizeof(struct extent_tree)); et->ino = ino; |
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et->root = RB_ROOT_CACHED; |
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et->cached_en = NULL; rwlock_init(&et->lock); |
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INIT_LIST_HEAD(&et->list); |
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atomic_set(&et->node_cnt, 0); |
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atomic_inc(&sbi->total_ext_tree); |
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} else { atomic_dec(&sbi->total_zombie_tree); |
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list_del_init(&et->list); |
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} |
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mutex_unlock(&sbi->extent_tree_lock); |
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/* never died until evict_inode */ F2FS_I(inode)->extent_tree = et; return et; } |
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static struct extent_node *__init_extent_tree(struct f2fs_sb_info *sbi, struct extent_tree *et, struct extent_info *ei) |
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{ |
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struct rb_node **p = &et->root.rb_root.rb_node; |
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struct extent_node *en; |
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en = __attach_extent_node(sbi, et, ei, NULL, p, true); |
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if (!en) return NULL; |
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et->largest = en->ei; |
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et->cached_en = en; return en; } static unsigned int __free_extent_tree(struct f2fs_sb_info *sbi, |
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struct extent_tree *et) |
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{ struct rb_node *node, *next; struct extent_node *en; |
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unsigned int count = atomic_read(&et->node_cnt); |
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|
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node = rb_first_cached(&et->root); |
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while (node) { next = rb_next(node); en = rb_entry(node, struct extent_node, rb_node); |
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__release_extent_node(sbi, et, en); |
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node = next; } |
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return count - atomic_read(&et->node_cnt); |
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} |
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static void __drop_largest_extent(struct extent_tree *et, |
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pgoff_t fofs, unsigned int len) |
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{ |
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if (fofs < et->largest.fofs + et->largest.len && fofs + len > et->largest.fofs) { et->largest.len = 0; et->largest_updated = true; |
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} |
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} |
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/* return true, if inode page is changed */ |
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static void __f2fs_init_extent_tree(struct inode *inode, struct page *ipage) |
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{ struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
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struct f2fs_extent *i_ext = ipage ? &F2FS_INODE(ipage)->i_ext : NULL; |
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struct extent_tree *et; struct extent_node *en; struct extent_info ei; |
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if (!f2fs_may_extent_tree(inode)) { /* drop largest extent */ if (i_ext && i_ext->len) { |
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f2fs_wait_on_page_writeback(ipage, NODE, true, true); |
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i_ext->len = 0; |
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set_page_dirty(ipage); return; |
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} |
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return; |
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} |
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et = __grab_extent_tree(inode); |
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if (!i_ext || !i_ext->len) |
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return; |
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|
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get_extent_info(&ei, i_ext); |
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write_lock(&et->lock); |
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if (atomic_read(&et->node_cnt)) |
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goto out; |
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en = __init_extent_tree(sbi, et, &ei); |
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if (en) { spin_lock(&sbi->extent_lock); list_add_tail(&en->list, &sbi->extent_list); spin_unlock(&sbi->extent_lock); } out: write_unlock(&et->lock); } |
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void f2fs_init_extent_tree(struct inode *inode, struct page *ipage) |
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{ |
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__f2fs_init_extent_tree(inode, ipage); |
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if (!F2FS_I(inode)->extent_tree) set_inode_flag(inode, FI_NO_EXTENT); |
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} |
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static bool f2fs_lookup_extent_tree(struct inode *inode, pgoff_t pgofs, struct extent_info *ei) { struct f2fs_sb_info *sbi = F2FS_I_SB(inode); struct extent_tree *et = F2FS_I(inode)->extent_tree; struct extent_node *en; bool ret = false; f2fs_bug_on(sbi, !et); trace_f2fs_lookup_extent_tree_start(inode, pgofs); read_lock(&et->lock); if (et->largest.fofs <= pgofs && et->largest.fofs + et->largest.len > pgofs) { *ei = et->largest; ret = true; |
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stat_inc_largest_node_hit(sbi); |
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goto out; } |
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en = (struct extent_node *)f2fs_lookup_rb_tree(&et->root, |
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(struct rb_entry *)et->cached_en, pgofs); if (!en) goto out; if (en == et->cached_en) stat_inc_cached_node_hit(sbi); else stat_inc_rbtree_node_hit(sbi); *ei = en->ei; spin_lock(&sbi->extent_lock); if (!list_empty(&en->list)) { list_move_tail(&en->list, &sbi->extent_list); et->cached_en = en; |
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} |
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spin_unlock(&sbi->extent_lock); ret = true; |
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out: |
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stat_inc_total_hit(sbi); |
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read_unlock(&et->lock); trace_f2fs_lookup_extent_tree_end(inode, pgofs, ei); return ret; } |
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static struct extent_node *__try_merge_extent_node(struct f2fs_sb_info *sbi, |
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struct extent_tree *et, struct extent_info *ei, |
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struct extent_node *prev_ex, |
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struct extent_node *next_ex) |
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{ |
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struct extent_node *en = NULL; |
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if (prev_ex && __is_back_mergeable(ei, &prev_ex->ei)) { |
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prev_ex->ei.len += ei->len; ei = &prev_ex->ei; en = prev_ex; } |
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|
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if (next_ex && __is_front_mergeable(ei, &next_ex->ei)) { |
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next_ex->ei.fofs = ei->fofs; next_ex->ei.blk = ei->blk; next_ex->ei.len += ei->len; |
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if (en) __release_extent_node(sbi, et, prev_ex); |
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en = next_ex; } |
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|
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if (!en) return NULL; |
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__try_update_largest_extent(et, en); |
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spin_lock(&sbi->extent_lock); |
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if (!list_empty(&en->list)) { |
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list_move_tail(&en->list, &sbi->extent_list); |
429267442 f2fs: don't set c... |
459 460 |
et->cached_en = en; } |
43a2fa180 f2fs: move extent... |
461 |
spin_unlock(&sbi->extent_lock); |
ef05e2219 f2fs: split __ins... |
462 463 |
return en; } |
b430f7263 f2fs: avoid sleep... |
464 |
static struct extent_node *__insert_extent_tree(struct f2fs_sb_info *sbi, |
ef05e2219 f2fs: split __ins... |
465 466 |
struct extent_tree *et, struct extent_info *ei, struct rb_node **insert_p, |
4dada3fd7 f2fs: use rb_*_ca... |
467 468 |
struct rb_node *insert_parent, bool leftmost) |
ef05e2219 f2fs: split __ins... |
469 |
{ |
8fe326cb9 f2fs: remove redu... |
470 |
struct rb_node **p; |
ef05e2219 f2fs: split __ins... |
471 472 |
struct rb_node *parent = NULL; struct extent_node *en = NULL; |
0f825ee6e f2fs: add new int... |
473 474 475 476 477 478 |
if (insert_p && insert_parent) { parent = insert_parent; p = insert_p; goto do_insert; } |
4dada3fd7 f2fs: use rb_*_ca... |
479 480 481 482 |
leftmost = true; p = f2fs_lookup_rb_tree_for_insert(sbi, &et->root, &parent, ei->fofs, &leftmost); |
0f825ee6e f2fs: add new int... |
483 |
do_insert: |
4dada3fd7 f2fs: use rb_*_ca... |
484 |
en = __attach_extent_node(sbi, et, ei, parent, p, leftmost); |
0f825ee6e f2fs: add new int... |
485 486 |
if (!en) return NULL; |
ef05e2219 f2fs: split __ins... |
487 |
|
b430f7263 f2fs: avoid sleep... |
488 |
__try_update_largest_extent(et, en); |
43a2fa180 f2fs: move extent... |
489 490 491 492 |
/* update in global extent list */ spin_lock(&sbi->extent_lock); list_add_tail(&en->list, &sbi->extent_list); |
429267442 f2fs: don't set c... |
493 |
et->cached_en = en; |
43a2fa180 f2fs: move extent... |
494 |
spin_unlock(&sbi->extent_lock); |
0f825ee6e f2fs: add new int... |
495 496 |
return en; } |
317e13009 f2fs: kill __is_e... |
497 |
static void f2fs_update_extent_tree_range(struct inode *inode, |
19b2c30d3 f2fs: update exte... |
498 |
pgoff_t fofs, block_t blkaddr, unsigned int len) |
a28ef1f5a f2fs: maintain ex... |
499 500 501 |
{ struct f2fs_sb_info *sbi = F2FS_I_SB(inode); struct extent_tree *et = F2FS_I(inode)->extent_tree; |
4d1fa815f f2fs: optimize co... |
502 |
struct extent_node *en = NULL, *en1 = NULL; |
19b2c30d3 f2fs: update exte... |
503 |
struct extent_node *prev_en = NULL, *next_en = NULL; |
a28ef1f5a f2fs: maintain ex... |
504 |
struct extent_info ei, dei, prev; |
0f825ee6e f2fs: add new int... |
505 |
struct rb_node **insert_p = NULL, *insert_parent = NULL; |
19b2c30d3 f2fs: update exte... |
506 507 |
unsigned int end = fofs + len; unsigned int pos = (unsigned int)fofs; |
b430f7263 f2fs: avoid sleep... |
508 |
bool updated = false; |
f9aa52a8c f2fs: fix to init... |
509 |
bool leftmost = false; |
a28ef1f5a f2fs: maintain ex... |
510 511 |
if (!et) |
317e13009 f2fs: kill __is_e... |
512 |
return; |
a28ef1f5a f2fs: maintain ex... |
513 |
|
744288c72 f2fs: trace in ba... |
514 |
trace_f2fs_update_extent_tree_range(inode, fofs, blkaddr, len); |
a28ef1f5a f2fs: maintain ex... |
515 |
write_lock(&et->lock); |
91942321e f2fs: use inode p... |
516 |
if (is_inode_flag_set(inode, FI_NO_EXTENT)) { |
a28ef1f5a f2fs: maintain ex... |
517 |
write_unlock(&et->lock); |
317e13009 f2fs: kill __is_e... |
518 |
return; |
a28ef1f5a f2fs: maintain ex... |
519 520 521 522 |
} prev = et->largest; dei.len = 0; |
4d1fa815f f2fs: optimize co... |
523 524 525 526 |
/* * drop largest extent before lookup, in case it's already * been shrunk from extent tree */ |
b430f7263 f2fs: avoid sleep... |
527 |
__drop_largest_extent(et, fofs, len); |
a28ef1f5a f2fs: maintain ex... |
528 |
|
19b2c30d3 f2fs: update exte... |
529 |
/* 1. lookup first extent node in range [fofs, fofs + len - 1] */ |
4d57b86dd f2fs: clean up sy... |
530 |
en = (struct extent_node *)f2fs_lookup_rb_tree_ret(&et->root, |
54c2258cd f2fs: extract rb-... |
531 532 533 |
(struct rb_entry *)et->cached_en, fofs, (struct rb_entry **)&prev_en, (struct rb_entry **)&next_en, |
4dada3fd7 f2fs: use rb_*_ca... |
534 535 |
&insert_p, &insert_parent, false, &leftmost); |
4d1fa815f f2fs: optimize co... |
536 537 |
if (!en) en = next_en; |
19b2c30d3 f2fs: update exte... |
538 539 |
/* 2. invlidate all extent nodes in range [fofs, fofs + len - 1] */ |
4d1fa815f f2fs: optimize co... |
540 541 542 |
while (en && en->ei.fofs < end) { unsigned int org_end; int parts = 0; /* # of parts current extent split into */ |
19b2c30d3 f2fs: update exte... |
543 |
|
4d1fa815f f2fs: optimize co... |
544 |
next_en = en1 = NULL; |
19b2c30d3 f2fs: update exte... |
545 546 |
dei = en->ei; |
4d1fa815f f2fs: optimize co... |
547 548 |
org_end = dei.fofs + dei.len; f2fs_bug_on(sbi, pos >= org_end); |
19b2c30d3 f2fs: update exte... |
549 |
|
4d1fa815f f2fs: optimize co... |
550 551 552 553 554 |
if (pos > dei.fofs && pos - dei.fofs >= F2FS_MIN_EXTENT_LEN) { en->ei.len = pos - en->ei.fofs; prev_en = en; parts = 1; } |
19b2c30d3 f2fs: update exte... |
555 |
|
4d1fa815f f2fs: optimize co... |
556 557 558 559 560 |
if (end < org_end && org_end - end >= F2FS_MIN_EXTENT_LEN) { if (parts) { set_extent_info(&ei, end, end - dei.fofs + dei.blk, org_end - end); |
b430f7263 f2fs: avoid sleep... |
561 |
en1 = __insert_extent_tree(sbi, et, &ei, |
4dada3fd7 f2fs: use rb_*_ca... |
562 |
NULL, NULL, true); |
4d1fa815f f2fs: optimize co... |
563 564 565 566 567 568 |
next_en = en1; } else { en->ei.fofs = end; en->ei.blk += end - dei.fofs; en->ei.len -= end - dei.fofs; next_en = en; |
19b2c30d3 f2fs: update exte... |
569 |
} |
4d1fa815f f2fs: optimize co... |
570 |
parts++; |
19b2c30d3 f2fs: update exte... |
571 |
} |
4d1fa815f f2fs: optimize co... |
572 573 |
if (!next_en) { struct rb_node *node = rb_next(&en->rb_node); |
19b2c30d3 f2fs: update exte... |
574 |
|
ed0b56209 f2fs: use rb_entr... |
575 576 |
next_en = rb_entry_safe(node, struct extent_node, rb_node); |
a28ef1f5a f2fs: maintain ex... |
577 |
} |
4abd3f5ac f2fs: introduce _... |
578 |
if (parts) |
b430f7263 f2fs: avoid sleep... |
579 |
__try_update_largest_extent(et, en); |
4abd3f5ac f2fs: introduce _... |
580 |
else |
a03f01f26 f2fs: reconstruct... |
581 |
__release_extent_node(sbi, et, en); |
19b2c30d3 f2fs: update exte... |
582 583 |
/* |
4d1fa815f f2fs: optimize co... |
584 585 586 |
* if original extent is split into zero or two parts, extent * tree has been altered by deletion or insertion, therefore * invalidate pointers regard to tree. |
19b2c30d3 f2fs: update exte... |
587 |
*/ |
4d1fa815f f2fs: optimize co... |
588 589 590 |
if (parts != 1) { insert_p = NULL; insert_parent = NULL; |
a28ef1f5a f2fs: maintain ex... |
591 |
} |
4d1fa815f f2fs: optimize co... |
592 |
en = next_en; |
a28ef1f5a f2fs: maintain ex... |
593 |
} |
a28ef1f5a f2fs: maintain ex... |
594 595 |
/* 3. update extent in extent cache */ if (blkaddr) { |
19b2c30d3 f2fs: update exte... |
596 597 |
set_extent_info(&ei, fofs, blkaddr, len); |
b430f7263 f2fs: avoid sleep... |
598 599 |
if (!__try_merge_extent_node(sbi, et, &ei, prev_en, next_en)) __insert_extent_tree(sbi, et, &ei, |
4dada3fd7 f2fs: use rb_*_ca... |
600 |
insert_p, insert_parent, leftmost); |
a28ef1f5a f2fs: maintain ex... |
601 602 603 604 605 |
/* give up extent_cache, if split and small updates happen */ if (dei.len >= 1 && prev.len < F2FS_MIN_EXTENT_LEN && et->largest.len < F2FS_MIN_EXTENT_LEN) { |
b430f7263 f2fs: avoid sleep... |
606 607 |
et->largest.len = 0; et->largest_updated = true; |
91942321e f2fs: use inode p... |
608 |
set_inode_flag(inode, FI_NO_EXTENT); |
a28ef1f5a f2fs: maintain ex... |
609 |
} |
19b2c30d3 f2fs: update exte... |
610 |
} |
a28ef1f5a f2fs: maintain ex... |
611 |
|
91942321e f2fs: use inode p... |
612 |
if (is_inode_flag_set(inode, FI_NO_EXTENT)) |
201ef5e08 f2fs: improve shr... |
613 |
__free_extent_tree(sbi, et); |
a28ef1f5a f2fs: maintain ex... |
614 |
|
b430f7263 f2fs: avoid sleep... |
615 616 617 618 |
if (et->largest_updated) { et->largest_updated = false; updated = true; } |
a28ef1f5a f2fs: maintain ex... |
619 |
write_unlock(&et->lock); |
b430f7263 f2fs: avoid sleep... |
620 621 622 |
if (updated) f2fs_mark_inode_dirty_sync(inode, true); |
a28ef1f5a f2fs: maintain ex... |
623 624 625 626 |
} unsigned int f2fs_shrink_extent_tree(struct f2fs_sb_info *sbi, int nr_shrink) { |
137d09f00 f2fs: introduce z... |
627 |
struct extent_tree *et, *next; |
201ef5e08 f2fs: improve shr... |
628 |
struct extent_node *en; |
a28ef1f5a f2fs: maintain ex... |
629 630 631 632 633 |
unsigned int node_cnt = 0, tree_cnt = 0; int remained; if (!test_opt(sbi, EXTENT_CACHE)) return 0; |
74fd8d992 f2fs: speed up sh... |
634 635 |
if (!atomic_read(&sbi->total_zombie_tree)) goto free_node; |
5e8256ac2 f2fs: replace rw ... |
636 |
if (!mutex_trylock(&sbi->extent_tree_lock)) |
a28ef1f5a f2fs: maintain ex... |
637 638 639 |
goto out; /* 1. remove unreferenced extent tree */ |
137d09f00 f2fs: introduce z... |
640 |
list_for_each_entry_safe(et, next, &sbi->zombie_list, list) { |
9b72a388f f2fs: skip releas... |
641 642 |
if (atomic_read(&et->node_cnt)) { write_lock(&et->lock); |
201ef5e08 f2fs: improve shr... |
643 |
node_cnt += __free_extent_tree(sbi, et); |
9b72a388f f2fs: skip releas... |
644 645 |
write_unlock(&et->lock); } |
201ef5e08 f2fs: improve shr... |
646 |
f2fs_bug_on(sbi, atomic_read(&et->node_cnt)); |
137d09f00 f2fs: introduce z... |
647 648 649 650 651 652 |
list_del_init(&et->list); radix_tree_delete(&sbi->extent_tree_root, et->ino); kmem_cache_free(extent_tree_slab, et); atomic_dec(&sbi->total_ext_tree); atomic_dec(&sbi->total_zombie_tree); tree_cnt++; |
a28ef1f5a f2fs: maintain ex... |
653 |
|
137d09f00 f2fs: introduce z... |
654 655 |
if (node_cnt + tree_cnt >= nr_shrink) goto unlock_out; |
6fe2bc956 f2fs: give schedu... |
656 |
cond_resched(); |
a28ef1f5a f2fs: maintain ex... |
657 |
} |
5e8256ac2 f2fs: replace rw ... |
658 |
mutex_unlock(&sbi->extent_tree_lock); |
a28ef1f5a f2fs: maintain ex... |
659 |
|
74fd8d992 f2fs: speed up sh... |
660 |
free_node: |
a28ef1f5a f2fs: maintain ex... |
661 |
/* 2. remove LRU extent entries */ |
5e8256ac2 f2fs: replace rw ... |
662 |
if (!mutex_trylock(&sbi->extent_tree_lock)) |
a28ef1f5a f2fs: maintain ex... |
663 664 665 666 667 |
goto out; remained = nr_shrink - (node_cnt + tree_cnt); spin_lock(&sbi->extent_lock); |
201ef5e08 f2fs: improve shr... |
668 669 |
for (; remained > 0; remained--) { if (list_empty(&sbi->extent_list)) |
a28ef1f5a f2fs: maintain ex... |
670 |
break; |
201ef5e08 f2fs: improve shr... |
671 672 673 674 675 676 677 678 |
en = list_first_entry(&sbi->extent_list, struct extent_node, list); et = en->et; if (!write_trylock(&et->lock)) { /* refresh this extent node's position in extent list */ list_move_tail(&en->list, &sbi->extent_list); continue; } |
a28ef1f5a f2fs: maintain ex... |
679 |
|
201ef5e08 f2fs: improve shr... |
680 681 |
list_del_init(&en->list); spin_unlock(&sbi->extent_lock); |
9b72a388f f2fs: skip releas... |
682 |
|
201ef5e08 f2fs: improve shr... |
683 |
__detach_extent_node(sbi, et, en); |
a28ef1f5a f2fs: maintain ex... |
684 |
|
201ef5e08 f2fs: improve shr... |
685 686 687 |
write_unlock(&et->lock); node_cnt++; spin_lock(&sbi->extent_lock); |
a28ef1f5a f2fs: maintain ex... |
688 |
} |
201ef5e08 f2fs: improve shr... |
689 |
spin_unlock(&sbi->extent_lock); |
a28ef1f5a f2fs: maintain ex... |
690 |
unlock_out: |
5e8256ac2 f2fs: replace rw ... |
691 |
mutex_unlock(&sbi->extent_tree_lock); |
a28ef1f5a f2fs: maintain ex... |
692 693 694 695 696 697 698 699 700 701 702 |
out: trace_f2fs_shrink_extent_tree(sbi, node_cnt, tree_cnt); return node_cnt + tree_cnt; } unsigned int f2fs_destroy_extent_node(struct inode *inode) { struct f2fs_sb_info *sbi = F2FS_I_SB(inode); struct extent_tree *et = F2FS_I(inode)->extent_tree; unsigned int node_cnt = 0; |
9b72a388f f2fs: skip releas... |
703 |
if (!et || !atomic_read(&et->node_cnt)) |
a28ef1f5a f2fs: maintain ex... |
704 705 706 |
return 0; write_lock(&et->lock); |
201ef5e08 f2fs: improve shr... |
707 |
node_cnt = __free_extent_tree(sbi, et); |
a28ef1f5a f2fs: maintain ex... |
708 709 710 711 |
write_unlock(&et->lock); return node_cnt; } |
5f281fab9 f2fs: disable ext... |
712 713 714 715 |
void f2fs_drop_extent_tree(struct inode *inode) { struct f2fs_sb_info *sbi = F2FS_I_SB(inode); struct extent_tree *et = F2FS_I(inode)->extent_tree; |
b430f7263 f2fs: avoid sleep... |
716 |
bool updated = false; |
5f281fab9 f2fs: disable ext... |
717 |
|
bf617f7a9 f2fs: fix to chec... |
718 719 |
if (!f2fs_may_extent_tree(inode)) return; |
5f281fab9 f2fs: disable ext... |
720 721 722 723 |
set_inode_flag(inode, FI_NO_EXTENT); write_lock(&et->lock); __free_extent_tree(sbi, et); |
b430f7263 f2fs: avoid sleep... |
724 725 726 727 |
if (et->largest.len) { et->largest.len = 0; updated = true; } |
5f281fab9 f2fs: disable ext... |
728 |
write_unlock(&et->lock); |
b430f7263 f2fs: avoid sleep... |
729 730 |
if (updated) f2fs_mark_inode_dirty_sync(inode, true); |
5f281fab9 f2fs: disable ext... |
731 |
} |
a28ef1f5a f2fs: maintain ex... |
732 733 734 735 736 737 738 739 |
void f2fs_destroy_extent_tree(struct inode *inode) { struct f2fs_sb_info *sbi = F2FS_I_SB(inode); struct extent_tree *et = F2FS_I(inode)->extent_tree; unsigned int node_cnt = 0; if (!et) return; |
68e353851 f2fs: use atomic ... |
740 741 |
if (inode->i_nlink && !is_bad_inode(inode) && atomic_read(&et->node_cnt)) { |
5e8256ac2 f2fs: replace rw ... |
742 |
mutex_lock(&sbi->extent_tree_lock); |
137d09f00 f2fs: introduce z... |
743 |
list_add_tail(&et->list, &sbi->zombie_list); |
74fd8d992 f2fs: speed up sh... |
744 |
atomic_inc(&sbi->total_zombie_tree); |
5e8256ac2 f2fs: replace rw ... |
745 |
mutex_unlock(&sbi->extent_tree_lock); |
a28ef1f5a f2fs: maintain ex... |
746 747 748 749 750 751 752 |
return; } /* free all extent info belong to this extent tree */ node_cnt = f2fs_destroy_extent_node(inode); /* delete extent tree entry in radix tree */ |
5e8256ac2 f2fs: replace rw ... |
753 |
mutex_lock(&sbi->extent_tree_lock); |
68e353851 f2fs: use atomic ... |
754 |
f2fs_bug_on(sbi, atomic_read(&et->node_cnt)); |
a28ef1f5a f2fs: maintain ex... |
755 756 |
radix_tree_delete(&sbi->extent_tree_root, inode->i_ino); kmem_cache_free(extent_tree_slab, et); |
7441ccef3 f2fs: use atomic ... |
757 |
atomic_dec(&sbi->total_ext_tree); |
5e8256ac2 f2fs: replace rw ... |
758 |
mutex_unlock(&sbi->extent_tree_lock); |
a28ef1f5a f2fs: maintain ex... |
759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 |
F2FS_I(inode)->extent_tree = NULL; trace_f2fs_destroy_extent_tree(inode, node_cnt); } bool f2fs_lookup_extent_cache(struct inode *inode, pgoff_t pgofs, struct extent_info *ei) { if (!f2fs_may_extent_tree(inode)) return false; return f2fs_lookup_extent_tree(inode, pgofs, ei); } void f2fs_update_extent_cache(struct dnode_of_data *dn) { |
a28ef1f5a f2fs: maintain ex... |
776 |
pgoff_t fofs; |
f28b3434a f2fs: introduce f... |
777 |
block_t blkaddr; |
a28ef1f5a f2fs: maintain ex... |
778 779 780 |
if (!f2fs_may_extent_tree(dn->inode)) return; |
f28b3434a f2fs: introduce f... |
781 782 783 784 |
if (dn->data_blkaddr == NEW_ADDR) blkaddr = NULL_ADDR; else blkaddr = dn->data_blkaddr; |
19b2c30d3 f2fs: update exte... |
785 |
|
4d57b86dd f2fs: clean up sy... |
786 |
fofs = f2fs_start_bidx_of_node(ofs_of_node(dn->node_page), dn->inode) + |
81ca7350c f2fs: remove unne... |
787 |
dn->ofs_in_node; |
ee6d182f2 f2fs: remove sync... |
788 |
f2fs_update_extent_tree_range(dn->inode, fofs, blkaddr, 1); |
19b2c30d3 f2fs: update exte... |
789 790 791 792 793 794 795 796 |
} void f2fs_update_extent_cache_range(struct dnode_of_data *dn, pgoff_t fofs, block_t blkaddr, unsigned int len) { if (!f2fs_may_extent_tree(dn->inode)) return; |
ee6d182f2 f2fs: remove sync... |
797 |
f2fs_update_extent_tree_range(dn->inode, fofs, blkaddr, len); |
a28ef1f5a f2fs: maintain ex... |
798 |
} |
4d57b86dd f2fs: clean up sy... |
799 |
void f2fs_init_extent_cache_info(struct f2fs_sb_info *sbi) |
a28ef1f5a f2fs: maintain ex... |
800 801 |
{ INIT_RADIX_TREE(&sbi->extent_tree_root, GFP_NOIO); |
5e8256ac2 f2fs: replace rw ... |
802 |
mutex_init(&sbi->extent_tree_lock); |
a28ef1f5a f2fs: maintain ex... |
803 804 |
INIT_LIST_HEAD(&sbi->extent_list); spin_lock_init(&sbi->extent_lock); |
7441ccef3 f2fs: use atomic ... |
805 |
atomic_set(&sbi->total_ext_tree, 0); |
137d09f00 f2fs: introduce z... |
806 |
INIT_LIST_HEAD(&sbi->zombie_list); |
74fd8d992 f2fs: speed up sh... |
807 |
atomic_set(&sbi->total_zombie_tree, 0); |
a28ef1f5a f2fs: maintain ex... |
808 809 |
atomic_set(&sbi->total_ext_node, 0); } |
4d57b86dd f2fs: clean up sy... |
810 |
int __init f2fs_create_extent_cache(void) |
a28ef1f5a f2fs: maintain ex... |
811 812 813 814 815 816 817 818 819 820 821 822 823 |
{ extent_tree_slab = f2fs_kmem_cache_create("f2fs_extent_tree", sizeof(struct extent_tree)); if (!extent_tree_slab) return -ENOMEM; extent_node_slab = f2fs_kmem_cache_create("f2fs_extent_node", sizeof(struct extent_node)); if (!extent_node_slab) { kmem_cache_destroy(extent_tree_slab); return -ENOMEM; } return 0; } |
4d57b86dd f2fs: clean up sy... |
824 |
void f2fs_destroy_extent_cache(void) |
a28ef1f5a f2fs: maintain ex... |
825 826 827 828 |
{ kmem_cache_destroy(extent_node_slab); kmem_cache_destroy(extent_tree_slab); } |