17c1a000dSChao Yu // SPDX-License-Identifier: GPL-2.0
2a28ef1f5SChao Yu /*
3a28ef1f5SChao Yu * f2fs extent cache support
4a28ef1f5SChao Yu *
5a28ef1f5SChao Yu * Copyright (c) 2015 Motorola Mobility
6a28ef1f5SChao Yu * Copyright (c) 2015 Samsung Electronics
7a28ef1f5SChao Yu * Authors: Jaegeuk Kim <jaegeuk@kernel.org>
8a28ef1f5SChao Yu * Chao Yu <chao2.yu@samsung.com>
971644dffSJaegeuk Kim *
1071644dffSJaegeuk Kim * block_age-based extent cache added by:
1171644dffSJaegeuk Kim * Copyright (c) 2022 xiaomi Co., Ltd.
1271644dffSJaegeuk Kim * http://www.xiaomi.com/
13a28ef1f5SChao Yu */
14a28ef1f5SChao Yu
15a28ef1f5SChao Yu #include <linux/fs.h>
16a28ef1f5SChao Yu #include <linux/f2fs_fs.h>
17a28ef1f5SChao Yu
18a28ef1f5SChao Yu #include "f2fs.h"
19a28ef1f5SChao Yu #include "node.h"
20a28ef1f5SChao Yu #include <trace/events/f2fs.h>
21a28ef1f5SChao Yu
sanity_check_extent_cache(struct inode * inode)22269d1194SChao Yu bool sanity_check_extent_cache(struct inode *inode)
23269d1194SChao Yu {
24269d1194SChao Yu struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
25269d1194SChao Yu struct f2fs_inode_info *fi = F2FS_I(inode);
26bd90c5cdSJaegeuk Kim struct extent_tree *et = fi->extent_tree[EX_READ];
27269d1194SChao Yu struct extent_info *ei;
28269d1194SChao Yu
29bd90c5cdSJaegeuk Kim if (!et)
30269d1194SChao Yu return true;
31269d1194SChao Yu
32bd90c5cdSJaegeuk Kim ei = &et->largest;
33bd90c5cdSJaegeuk Kim if (!ei->len)
34bd90c5cdSJaegeuk Kim return true;
35269d1194SChao Yu
36bd90c5cdSJaegeuk Kim /* Let's drop, if checkpoint got corrupted. */
37bd90c5cdSJaegeuk Kim if (is_set_ckpt_flags(sbi, CP_ERROR_FLAG)) {
38bd90c5cdSJaegeuk Kim ei->len = 0;
39bd90c5cdSJaegeuk Kim et->largest_updated = true;
40bd90c5cdSJaegeuk Kim return true;
41bd90c5cdSJaegeuk Kim }
42bd90c5cdSJaegeuk Kim
43bd90c5cdSJaegeuk Kim if (!f2fs_is_valid_blkaddr(sbi, ei->blk, DATA_GENERIC_ENHANCE) ||
44269d1194SChao Yu !f2fs_is_valid_blkaddr(sbi, ei->blk + ei->len - 1,
45bd90c5cdSJaegeuk Kim DATA_GENERIC_ENHANCE)) {
46269d1194SChao Yu set_sbi_flag(sbi, SBI_NEED_FSCK);
47269d1194SChao Yu f2fs_warn(sbi, "%s: inode (ino=%lx) extent info [%u, %u, %u] is incorrect, run fsck to fix",
48269d1194SChao Yu __func__, inode->i_ino,
49269d1194SChao Yu ei->blk, ei->fofs, ei->len);
50269d1194SChao Yu return false;
51269d1194SChao Yu }
52269d1194SChao Yu return true;
53269d1194SChao Yu }
54269d1194SChao Yu
__set_extent_info(struct extent_info * ei,unsigned int fofs,unsigned int len,block_t blk,bool keep_clen,unsigned long age,unsigned long last_blocks,enum extent_type type)553bac20a8SJaegeuk Kim static void __set_extent_info(struct extent_info *ei,
563bac20a8SJaegeuk Kim unsigned int fofs, unsigned int len,
57e7547dacSJaegeuk Kim block_t blk, bool keep_clen,
5871644dffSJaegeuk Kim unsigned long age, unsigned long last_blocks,
59e7547dacSJaegeuk Kim enum extent_type type)
603bac20a8SJaegeuk Kim {
613bac20a8SJaegeuk Kim ei->fofs = fofs;
623bac20a8SJaegeuk Kim ei->len = len;
633bac20a8SJaegeuk Kim
64e7547dacSJaegeuk Kim if (type == EX_READ) {
65e7547dacSJaegeuk Kim ei->blk = blk;
663bac20a8SJaegeuk Kim if (keep_clen)
673bac20a8SJaegeuk Kim return;
683bac20a8SJaegeuk Kim #ifdef CONFIG_F2FS_FS_COMPRESSION
693bac20a8SJaegeuk Kim ei->c_len = 0;
703bac20a8SJaegeuk Kim #endif
7171644dffSJaegeuk Kim } else if (type == EX_BLOCK_AGE) {
7271644dffSJaegeuk Kim ei->age = age;
7371644dffSJaegeuk Kim ei->last_blocks = last_blocks;
743bac20a8SJaegeuk Kim }
75e7547dacSJaegeuk Kim }
763bac20a8SJaegeuk Kim
__init_may_extent_tree(struct inode * inode,enum extent_type type)7772840cccSJaegeuk Kim static bool __init_may_extent_tree(struct inode *inode, enum extent_type type)
7872840cccSJaegeuk Kim {
7972840cccSJaegeuk Kim if (type == EX_READ)
80*d83309e7SJaegeuk Kim return test_opt(F2FS_I_SB(inode), READ_EXTENT_CACHE) &&
81*d83309e7SJaegeuk Kim S_ISREG(inode->i_mode);
82*d83309e7SJaegeuk Kim if (type == EX_BLOCK_AGE)
83*d83309e7SJaegeuk Kim return test_opt(F2FS_I_SB(inode), AGE_EXTENT_CACHE) &&
84*d83309e7SJaegeuk Kim (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode));
8572840cccSJaegeuk Kim return false;
8672840cccSJaegeuk Kim }
8772840cccSJaegeuk Kim
__may_extent_tree(struct inode * inode,enum extent_type type)88e7547dacSJaegeuk Kim static bool __may_extent_tree(struct inode *inode, enum extent_type type)
893bac20a8SJaegeuk Kim {
903bac20a8SJaegeuk Kim /*
913bac20a8SJaegeuk Kim * for recovered files during mount do not create extents
923bac20a8SJaegeuk Kim * if shrinker is not registered.
933bac20a8SJaegeuk Kim */
9472840cccSJaegeuk Kim if (list_empty(&F2FS_I_SB(inode)->s_list))
953bac20a8SJaegeuk Kim return false;
963bac20a8SJaegeuk Kim
97*d83309e7SJaegeuk Kim if (!__init_may_extent_tree(inode, type))
98*d83309e7SJaegeuk Kim return false;
99*d83309e7SJaegeuk Kim
100*d83309e7SJaegeuk Kim if (type == EX_READ) {
101*d83309e7SJaegeuk Kim if (is_inode_flag_set(inode, FI_NO_EXTENT))
102*d83309e7SJaegeuk Kim return false;
103*d83309e7SJaegeuk Kim if (is_inode_flag_set(inode, FI_COMPRESSED_FILE) &&
104*d83309e7SJaegeuk Kim !f2fs_sb_has_readonly(F2FS_I_SB(inode)))
105*d83309e7SJaegeuk Kim return false;
106*d83309e7SJaegeuk Kim } else if (type == EX_BLOCK_AGE) {
107*d83309e7SJaegeuk Kim if (is_inode_flag_set(inode, FI_COMPRESSED_FILE))
108*d83309e7SJaegeuk Kim return false;
109*d83309e7SJaegeuk Kim if (file_is_cold(inode))
110*d83309e7SJaegeuk Kim return false;
111*d83309e7SJaegeuk Kim }
112*d83309e7SJaegeuk Kim return true;
1133bac20a8SJaegeuk Kim }
1143bac20a8SJaegeuk Kim
__try_update_largest_extent(struct extent_tree * et,struct extent_node * en)1153bac20a8SJaegeuk Kim static void __try_update_largest_extent(struct extent_tree *et,
1163bac20a8SJaegeuk Kim struct extent_node *en)
1173bac20a8SJaegeuk Kim {
118e7547dacSJaegeuk Kim if (et->type != EX_READ)
119e7547dacSJaegeuk Kim return;
1203bac20a8SJaegeuk Kim if (en->ei.len <= et->largest.len)
1213bac20a8SJaegeuk Kim return;
1223bac20a8SJaegeuk Kim
1233bac20a8SJaegeuk Kim et->largest = en->ei;
1243bac20a8SJaegeuk Kim et->largest_updated = true;
1253bac20a8SJaegeuk Kim }
1263bac20a8SJaegeuk Kim
__is_extent_mergeable(struct extent_info * back,struct extent_info * front,enum extent_type type)1273bac20a8SJaegeuk Kim static bool __is_extent_mergeable(struct extent_info *back,
128e7547dacSJaegeuk Kim struct extent_info *front, enum extent_type type)
1293bac20a8SJaegeuk Kim {
130e7547dacSJaegeuk Kim if (type == EX_READ) {
1313bac20a8SJaegeuk Kim #ifdef CONFIG_F2FS_FS_COMPRESSION
1323bac20a8SJaegeuk Kim if (back->c_len && back->len != back->c_len)
1333bac20a8SJaegeuk Kim return false;
1343bac20a8SJaegeuk Kim if (front->c_len && front->len != front->c_len)
1353bac20a8SJaegeuk Kim return false;
1363bac20a8SJaegeuk Kim #endif
1373bac20a8SJaegeuk Kim return (back->fofs + back->len == front->fofs &&
1383bac20a8SJaegeuk Kim back->blk + back->len == front->blk);
13971644dffSJaegeuk Kim } else if (type == EX_BLOCK_AGE) {
14071644dffSJaegeuk Kim return (back->fofs + back->len == front->fofs &&
14171644dffSJaegeuk Kim abs(back->age - front->age) <= SAME_AGE_REGION &&
14271644dffSJaegeuk Kim abs(back->last_blocks - front->last_blocks) <=
14371644dffSJaegeuk Kim SAME_AGE_REGION);
1443bac20a8SJaegeuk Kim }
145e7547dacSJaegeuk Kim return false;
146e7547dacSJaegeuk Kim }
1473bac20a8SJaegeuk Kim
__is_back_mergeable(struct extent_info * cur,struct extent_info * back,enum extent_type type)1483bac20a8SJaegeuk Kim static bool __is_back_mergeable(struct extent_info *cur,
149e7547dacSJaegeuk Kim struct extent_info *back, enum extent_type type)
1503bac20a8SJaegeuk Kim {
151e7547dacSJaegeuk Kim return __is_extent_mergeable(back, cur, type);
1523bac20a8SJaegeuk Kim }
1533bac20a8SJaegeuk Kim
__is_front_mergeable(struct extent_info * cur,struct extent_info * front,enum extent_type type)1543bac20a8SJaegeuk Kim static bool __is_front_mergeable(struct extent_info *cur,
155e7547dacSJaegeuk Kim struct extent_info *front, enum extent_type type)
1563bac20a8SJaegeuk Kim {
157e7547dacSJaegeuk Kim return __is_extent_mergeable(cur, front, type);
1583bac20a8SJaegeuk Kim }
1593bac20a8SJaegeuk Kim
__lookup_extent_node(struct rb_root_cached * root,struct extent_node * cached_en,unsigned int fofs)160bf21acf9SJaegeuk Kim static struct extent_node *__lookup_extent_node(struct rb_root_cached *root,
161bf21acf9SJaegeuk Kim struct extent_node *cached_en, unsigned int fofs)
16254c2258cSChao Yu {
1634dada3fdSChao Yu struct rb_node *node = root->rb_root.rb_node;
164bf21acf9SJaegeuk Kim struct extent_node *en;
16554c2258cSChao Yu
166bf21acf9SJaegeuk Kim /* check a cached entry */
167bf21acf9SJaegeuk Kim if (cached_en && cached_en->ei.fofs <= fofs &&
168bf21acf9SJaegeuk Kim cached_en->ei.fofs + cached_en->ei.len > fofs)
169bf21acf9SJaegeuk Kim return cached_en;
170bf21acf9SJaegeuk Kim
171bf21acf9SJaegeuk Kim /* check rb_tree */
17254c2258cSChao Yu while (node) {
173bf21acf9SJaegeuk Kim en = rb_entry(node, struct extent_node, rb_node);
17454c2258cSChao Yu
175bf21acf9SJaegeuk Kim if (fofs < en->ei.fofs)
17654c2258cSChao Yu node = node->rb_left;
177bf21acf9SJaegeuk Kim else if (fofs >= en->ei.fofs + en->ei.len)
17854c2258cSChao Yu node = node->rb_right;
17954c2258cSChao Yu else
180bf21acf9SJaegeuk Kim return en;
18154c2258cSChao Yu }
18254c2258cSChao Yu return NULL;
18354c2258cSChao Yu }
18454c2258cSChao Yu
18554c2258cSChao Yu /*
186bf21acf9SJaegeuk Kim * lookup rb entry in position of @fofs in rb-tree,
18754c2258cSChao Yu * if hit, return the entry, otherwise, return NULL
188bf21acf9SJaegeuk Kim * @prev_ex: extent before fofs
189bf21acf9SJaegeuk Kim * @next_ex: extent after fofs
190bf21acf9SJaegeuk Kim * @insert_p: insert point for new extent at fofs
191146949deSJinyoung CHOI * in order to simplify the insertion after.
19254c2258cSChao Yu * tree must stay unchanged between lookup and insertion.
19354c2258cSChao Yu */
__lookup_extent_node_ret(struct rb_root_cached * root,struct extent_node * cached_en,unsigned int fofs,struct extent_node ** prev_entry,struct extent_node ** next_entry,struct rb_node *** insert_p,struct rb_node ** insert_parent,bool * leftmost)194bf21acf9SJaegeuk Kim static struct extent_node *__lookup_extent_node_ret(struct rb_root_cached *root,
195bf21acf9SJaegeuk Kim struct extent_node *cached_en,
196bf21acf9SJaegeuk Kim unsigned int fofs,
197bf21acf9SJaegeuk Kim struct extent_node **prev_entry,
198bf21acf9SJaegeuk Kim struct extent_node **next_entry,
19954c2258cSChao Yu struct rb_node ***insert_p,
200004b6862SChao Yu struct rb_node **insert_parent,
201bf21acf9SJaegeuk Kim bool *leftmost)
20254c2258cSChao Yu {
2034dada3fdSChao Yu struct rb_node **pnode = &root->rb_root.rb_node;
20454c2258cSChao Yu struct rb_node *parent = NULL, *tmp_node;
205bf21acf9SJaegeuk Kim struct extent_node *en = cached_en;
20654c2258cSChao Yu
20754c2258cSChao Yu *insert_p = NULL;
20854c2258cSChao Yu *insert_parent = NULL;
20954c2258cSChao Yu *prev_entry = NULL;
21054c2258cSChao Yu *next_entry = NULL;
21154c2258cSChao Yu
2124dada3fdSChao Yu if (RB_EMPTY_ROOT(&root->rb_root))
21354c2258cSChao Yu return NULL;
21454c2258cSChao Yu
215bf21acf9SJaegeuk Kim if (en && en->ei.fofs <= fofs && en->ei.fofs + en->ei.len > fofs)
21654c2258cSChao Yu goto lookup_neighbors;
21754c2258cSChao Yu
2184dada3fdSChao Yu *leftmost = true;
2194dada3fdSChao Yu
22054c2258cSChao Yu while (*pnode) {
22154c2258cSChao Yu parent = *pnode;
222bf21acf9SJaegeuk Kim en = rb_entry(*pnode, struct extent_node, rb_node);
22354c2258cSChao Yu
224bf21acf9SJaegeuk Kim if (fofs < en->ei.fofs) {
22554c2258cSChao Yu pnode = &(*pnode)->rb_left;
226bf21acf9SJaegeuk Kim } else if (fofs >= en->ei.fofs + en->ei.len) {
22754c2258cSChao Yu pnode = &(*pnode)->rb_right;
2284dada3fdSChao Yu *leftmost = false;
2294dada3fdSChao Yu } else {
23054c2258cSChao Yu goto lookup_neighbors;
23154c2258cSChao Yu }
2324dada3fdSChao Yu }
23354c2258cSChao Yu
23454c2258cSChao Yu *insert_p = pnode;
23554c2258cSChao Yu *insert_parent = parent;
23654c2258cSChao Yu
237bf21acf9SJaegeuk Kim en = rb_entry(parent, struct extent_node, rb_node);
23854c2258cSChao Yu tmp_node = parent;
239bf21acf9SJaegeuk Kim if (parent && fofs > en->ei.fofs)
24054c2258cSChao Yu tmp_node = rb_next(parent);
241bf21acf9SJaegeuk Kim *next_entry = rb_entry_safe(tmp_node, struct extent_node, rb_node);
24254c2258cSChao Yu
24354c2258cSChao Yu tmp_node = parent;
244bf21acf9SJaegeuk Kim if (parent && fofs < en->ei.fofs)
24554c2258cSChao Yu tmp_node = rb_prev(parent);
246bf21acf9SJaegeuk Kim *prev_entry = rb_entry_safe(tmp_node, struct extent_node, rb_node);
24754c2258cSChao Yu return NULL;
24854c2258cSChao Yu
24954c2258cSChao Yu lookup_neighbors:
250bf21acf9SJaegeuk Kim if (fofs == en->ei.fofs) {
25154c2258cSChao Yu /* lookup prev node for merging backward later */
252bf21acf9SJaegeuk Kim tmp_node = rb_prev(&en->rb_node);
253bf21acf9SJaegeuk Kim *prev_entry = rb_entry_safe(tmp_node,
254bf21acf9SJaegeuk Kim struct extent_node, rb_node);
25554c2258cSChao Yu }
256bf21acf9SJaegeuk Kim if (fofs == en->ei.fofs + en->ei.len - 1) {
25754c2258cSChao Yu /* lookup next node for merging frontward later */
258bf21acf9SJaegeuk Kim tmp_node = rb_next(&en->rb_node);
259bf21acf9SJaegeuk Kim *next_entry = rb_entry_safe(tmp_node,
260bf21acf9SJaegeuk Kim struct extent_node, rb_node);
26154c2258cSChao Yu }
262bf21acf9SJaegeuk Kim return en;
26354c2258cSChao Yu }
26454c2258cSChao Yu
265a28ef1f5SChao Yu static struct kmem_cache *extent_tree_slab;
266a28ef1f5SChao Yu static struct kmem_cache *extent_node_slab;
267a28ef1f5SChao Yu
__attach_extent_node(struct f2fs_sb_info * sbi,struct extent_tree * et,struct extent_info * ei,struct rb_node * parent,struct rb_node ** p,bool leftmost)268a28ef1f5SChao Yu static struct extent_node *__attach_extent_node(struct f2fs_sb_info *sbi,
269a28ef1f5SChao Yu struct extent_tree *et, struct extent_info *ei,
2704dada3fdSChao Yu struct rb_node *parent, struct rb_node **p,
2714dada3fdSChao Yu bool leftmost)
272a28ef1f5SChao Yu {
273e7547dacSJaegeuk Kim struct extent_tree_info *eti = &sbi->extent_tree[et->type];
274a28ef1f5SChao Yu struct extent_node *en;
275a28ef1f5SChao Yu
27632410577SChao Yu en = f2fs_kmem_cache_alloc(extent_node_slab, GFP_ATOMIC, false, sbi);
277a28ef1f5SChao Yu if (!en)
278a28ef1f5SChao Yu return NULL;
279a28ef1f5SChao Yu
280a28ef1f5SChao Yu en->ei = *ei;
281a28ef1f5SChao Yu INIT_LIST_HEAD(&en->list);
282201ef5e0SHou Pengyang en->et = et;
283a28ef1f5SChao Yu
284a28ef1f5SChao Yu rb_link_node(&en->rb_node, parent, p);
2854dada3fdSChao Yu rb_insert_color_cached(&en->rb_node, &et->root, leftmost);
28668e35385SChao Yu atomic_inc(&et->node_cnt);
287e7547dacSJaegeuk Kim atomic_inc(&eti->total_ext_node);
288a28ef1f5SChao Yu return en;
289a28ef1f5SChao Yu }
290a28ef1f5SChao Yu
__detach_extent_node(struct f2fs_sb_info * sbi,struct extent_tree * et,struct extent_node * en)291a28ef1f5SChao Yu static void __detach_extent_node(struct f2fs_sb_info *sbi,
292a28ef1f5SChao Yu struct extent_tree *et, struct extent_node *en)
293a28ef1f5SChao Yu {
294e7547dacSJaegeuk Kim struct extent_tree_info *eti = &sbi->extent_tree[et->type];
295e7547dacSJaegeuk Kim
2964dada3fdSChao Yu rb_erase_cached(&en->rb_node, &et->root);
29768e35385SChao Yu atomic_dec(&et->node_cnt);
298e7547dacSJaegeuk Kim atomic_dec(&eti->total_ext_node);
299a28ef1f5SChao Yu
300a28ef1f5SChao Yu if (et->cached_en == en)
301a28ef1f5SChao Yu et->cached_en = NULL;
302a03f01f2SHou Pengyang kmem_cache_free(extent_node_slab, en);
303a03f01f2SHou Pengyang }
304a03f01f2SHou Pengyang
305a03f01f2SHou Pengyang /*
306a03f01f2SHou Pengyang * Flow to release an extent_node:
307a03f01f2SHou Pengyang * 1. list_del_init
308a03f01f2SHou Pengyang * 2. __detach_extent_node
309a03f01f2SHou Pengyang * 3. kmem_cache_free.
310a03f01f2SHou Pengyang */
__release_extent_node(struct f2fs_sb_info * sbi,struct extent_tree * et,struct extent_node * en)311a03f01f2SHou Pengyang static void __release_extent_node(struct f2fs_sb_info *sbi,
312a03f01f2SHou Pengyang struct extent_tree *et, struct extent_node *en)
313a03f01f2SHou Pengyang {
314e7547dacSJaegeuk Kim struct extent_tree_info *eti = &sbi->extent_tree[et->type];
315e7547dacSJaegeuk Kim
316e7547dacSJaegeuk Kim spin_lock(&eti->extent_lock);
317201ef5e0SHou Pengyang f2fs_bug_on(sbi, list_empty(&en->list));
318a03f01f2SHou Pengyang list_del_init(&en->list);
319e7547dacSJaegeuk Kim spin_unlock(&eti->extent_lock);
320a03f01f2SHou Pengyang
321a03f01f2SHou Pengyang __detach_extent_node(sbi, et, en);
322a28ef1f5SChao Yu }
323a28ef1f5SChao Yu
__grab_extent_tree(struct inode * inode,enum extent_type type)324e7547dacSJaegeuk Kim static struct extent_tree *__grab_extent_tree(struct inode *inode,
325e7547dacSJaegeuk Kim enum extent_type type)
326a28ef1f5SChao Yu {
327a28ef1f5SChao Yu struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
328e7547dacSJaegeuk Kim struct extent_tree_info *eti = &sbi->extent_tree[type];
329a28ef1f5SChao Yu struct extent_tree *et;
330a28ef1f5SChao Yu nid_t ino = inode->i_ino;
331a28ef1f5SChao Yu
332e7547dacSJaegeuk Kim mutex_lock(&eti->extent_tree_lock);
333e7547dacSJaegeuk Kim et = radix_tree_lookup(&eti->extent_tree_root, ino);
334a28ef1f5SChao Yu if (!et) {
33532410577SChao Yu et = f2fs_kmem_cache_alloc(extent_tree_slab,
33632410577SChao Yu GFP_NOFS, true, NULL);
337e7547dacSJaegeuk Kim f2fs_radix_tree_insert(&eti->extent_tree_root, ino, et);
338a28ef1f5SChao Yu memset(et, 0, sizeof(struct extent_tree));
339a28ef1f5SChao Yu et->ino = ino;
340e7547dacSJaegeuk Kim et->type = type;
3414dada3fdSChao Yu et->root = RB_ROOT_CACHED;
342a28ef1f5SChao Yu et->cached_en = NULL;
343a28ef1f5SChao Yu rwlock_init(&et->lock);
344137d09f0SJaegeuk Kim INIT_LIST_HEAD(&et->list);
34568e35385SChao Yu atomic_set(&et->node_cnt, 0);
346e7547dacSJaegeuk Kim atomic_inc(&eti->total_ext_tree);
34774fd8d99SJaegeuk Kim } else {
348e7547dacSJaegeuk Kim atomic_dec(&eti->total_zombie_tree);
349137d09f0SJaegeuk Kim list_del_init(&et->list);
350a28ef1f5SChao Yu }
351e7547dacSJaegeuk Kim mutex_unlock(&eti->extent_tree_lock);
352a28ef1f5SChao Yu
353a28ef1f5SChao Yu /* never died until evict_inode */
354e7547dacSJaegeuk Kim F2FS_I(inode)->extent_tree[type] = et;
355a28ef1f5SChao Yu
356a28ef1f5SChao Yu return et;
357a28ef1f5SChao Yu }
358a28ef1f5SChao Yu
__free_extent_tree(struct f2fs_sb_info * sbi,struct extent_tree * et)359a28ef1f5SChao Yu static unsigned int __free_extent_tree(struct f2fs_sb_info *sbi,
360201ef5e0SHou Pengyang struct extent_tree *et)
361a28ef1f5SChao Yu {
362a28ef1f5SChao Yu struct rb_node *node, *next;
363a28ef1f5SChao Yu struct extent_node *en;
36468e35385SChao Yu unsigned int count = atomic_read(&et->node_cnt);
365a28ef1f5SChao Yu
3664dada3fdSChao Yu node = rb_first_cached(&et->root);
367a28ef1f5SChao Yu while (node) {
368a28ef1f5SChao Yu next = rb_next(node);
369a28ef1f5SChao Yu en = rb_entry(node, struct extent_node, rb_node);
370a03f01f2SHou Pengyang __release_extent_node(sbi, et, en);
371a28ef1f5SChao Yu node = next;
372a28ef1f5SChao Yu }
373a28ef1f5SChao Yu
37468e35385SChao Yu return count - atomic_read(&et->node_cnt);
375a28ef1f5SChao Yu }
376a28ef1f5SChao Yu
__drop_largest_extent(struct extent_tree * et,pgoff_t fofs,unsigned int len)377b430f726SZhikang Zhang static void __drop_largest_extent(struct extent_tree *et,
37841a099deSFan Li pgoff_t fofs, unsigned int len)
379a28ef1f5SChao Yu {
380b430f726SZhikang Zhang if (fofs < et->largest.fofs + et->largest.len &&
381b430f726SZhikang Zhang fofs + len > et->largest.fofs) {
382b430f726SZhikang Zhang et->largest.len = 0;
383b430f726SZhikang Zhang et->largest_updated = true;
384205b9822SJaegeuk Kim }
385a28ef1f5SChao Yu }
386a28ef1f5SChao Yu
f2fs_init_read_extent_tree(struct inode * inode,struct page * ipage)38772840cccSJaegeuk Kim void f2fs_init_read_extent_tree(struct inode *inode, struct page *ipage)
388a28ef1f5SChao Yu {
389a28ef1f5SChao Yu struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
39072840cccSJaegeuk Kim struct extent_tree_info *eti = &sbi->extent_tree[EX_READ];
39172840cccSJaegeuk Kim struct f2fs_extent *i_ext = &F2FS_INODE(ipage)->i_ext;
392a28ef1f5SChao Yu struct extent_tree *et;
393a28ef1f5SChao Yu struct extent_node *en;
394a28ef1f5SChao Yu struct extent_info ei;
395a28ef1f5SChao Yu
39672840cccSJaegeuk Kim if (!__may_extent_tree(inode, EX_READ)) {
397e7547dacSJaegeuk Kim /* drop largest read extent */
39872840cccSJaegeuk Kim if (i_ext && i_ext->len) {
399a6d601f3SChao Yu f2fs_wait_on_page_writeback(ipage, NODE, true, true);
400ed3d1256SJaegeuk Kim i_ext->len = 0;
401a6d601f3SChao Yu set_page_dirty(ipage);
402ed3d1256SJaegeuk Kim }
403e7547dacSJaegeuk Kim goto out;
404ed3d1256SJaegeuk Kim }
405a28ef1f5SChao Yu
40672840cccSJaegeuk Kim et = __grab_extent_tree(inode, EX_READ);
407a28ef1f5SChao Yu
408ed3d1256SJaegeuk Kim if (!i_ext || !i_ext->len)
409e7547dacSJaegeuk Kim goto out;
410e7547dacSJaegeuk Kim
41112607c1bSJaegeuk Kim get_read_extent_info(&ei, i_ext);
412a28ef1f5SChao Yu
413a28ef1f5SChao Yu write_lock(&et->lock);
41468e35385SChao Yu if (atomic_read(&et->node_cnt))
415e7547dacSJaegeuk Kim goto unlock_out;
416a28ef1f5SChao Yu
417749d543cSJaegeuk Kim en = __attach_extent_node(sbi, et, &ei, NULL,
418749d543cSJaegeuk Kim &et->root.rb_root.rb_node, true);
419a28ef1f5SChao Yu if (en) {
420749d543cSJaegeuk Kim et->largest = en->ei;
421749d543cSJaegeuk Kim et->cached_en = en;
422749d543cSJaegeuk Kim
423e7547dacSJaegeuk Kim spin_lock(&eti->extent_lock);
424e7547dacSJaegeuk Kim list_add_tail(&en->list, &eti->extent_list);
425e7547dacSJaegeuk Kim spin_unlock(&eti->extent_lock);
426a28ef1f5SChao Yu }
427e7547dacSJaegeuk Kim unlock_out:
428a28ef1f5SChao Yu write_unlock(&et->lock);
429e7547dacSJaegeuk Kim out:
43072840cccSJaegeuk Kim if (!F2FS_I(inode)->extent_tree[EX_READ])
431e7547dacSJaegeuk Kim set_inode_flag(inode, FI_NO_EXTENT);
432a28ef1f5SChao Yu }
433a28ef1f5SChao Yu
f2fs_init_age_extent_tree(struct inode * inode)43471644dffSJaegeuk Kim void f2fs_init_age_extent_tree(struct inode *inode)
43571644dffSJaegeuk Kim {
43671644dffSJaegeuk Kim if (!__init_may_extent_tree(inode, EX_BLOCK_AGE))
43771644dffSJaegeuk Kim return;
43871644dffSJaegeuk Kim __grab_extent_tree(inode, EX_BLOCK_AGE);
43971644dffSJaegeuk Kim }
44071644dffSJaegeuk Kim
f2fs_init_extent_tree(struct inode * inode)44172840cccSJaegeuk Kim void f2fs_init_extent_tree(struct inode *inode)
442dad48e73SYunlei He {
443e7547dacSJaegeuk Kim /* initialize read cache */
44472840cccSJaegeuk Kim if (__init_may_extent_tree(inode, EX_READ))
44572840cccSJaegeuk Kim __grab_extent_tree(inode, EX_READ);
44671644dffSJaegeuk Kim
44771644dffSJaegeuk Kim /* initialize block age cache */
44871644dffSJaegeuk Kim if (__init_may_extent_tree(inode, EX_BLOCK_AGE))
44971644dffSJaegeuk Kim __grab_extent_tree(inode, EX_BLOCK_AGE);
450dad48e73SYunlei He }
451dad48e73SYunlei He
__lookup_extent_tree(struct inode * inode,pgoff_t pgofs,struct extent_info * ei,enum extent_type type)452e7547dacSJaegeuk Kim static bool __lookup_extent_tree(struct inode *inode, pgoff_t pgofs,
453e7547dacSJaegeuk Kim struct extent_info *ei, enum extent_type type)
454a28ef1f5SChao Yu {
455a28ef1f5SChao Yu struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
456e7547dacSJaegeuk Kim struct extent_tree_info *eti = &sbi->extent_tree[type];
457e7547dacSJaegeuk Kim struct extent_tree *et = F2FS_I(inode)->extent_tree[type];
458a28ef1f5SChao Yu struct extent_node *en;
459a28ef1f5SChao Yu bool ret = false;
460a28ef1f5SChao Yu
461df9d44b6SJaegeuk Kim if (!et)
462df9d44b6SJaegeuk Kim return false;
463a28ef1f5SChao Yu
464e7547dacSJaegeuk Kim trace_f2fs_lookup_extent_tree_start(inode, pgofs, type);
465a28ef1f5SChao Yu
466a28ef1f5SChao Yu read_lock(&et->lock);
467a28ef1f5SChao Yu
468e7547dacSJaegeuk Kim if (type == EX_READ &&
469e7547dacSJaegeuk Kim et->largest.fofs <= pgofs &&
470a28ef1f5SChao Yu et->largest.fofs + et->largest.len > pgofs) {
471a28ef1f5SChao Yu *ei = et->largest;
472a28ef1f5SChao Yu ret = true;
47391c481ffSChao Yu stat_inc_largest_node_hit(sbi);
474a28ef1f5SChao Yu goto out;
475a28ef1f5SChao Yu }
476a28ef1f5SChao Yu
477bf21acf9SJaegeuk Kim en = __lookup_extent_node(&et->root, et->cached_en, pgofs);
47854c2258cSChao Yu if (!en)
47954c2258cSChao Yu goto out;
48054c2258cSChao Yu
48154c2258cSChao Yu if (en == et->cached_en)
482e7547dacSJaegeuk Kim stat_inc_cached_node_hit(sbi, type);
48354c2258cSChao Yu else
484e7547dacSJaegeuk Kim stat_inc_rbtree_node_hit(sbi, type);
48554c2258cSChao Yu
486a28ef1f5SChao Yu *ei = en->ei;
487e7547dacSJaegeuk Kim spin_lock(&eti->extent_lock);
48842926744SJaegeuk Kim if (!list_empty(&en->list)) {
489e7547dacSJaegeuk Kim list_move_tail(&en->list, &eti->extent_list);
490a28ef1f5SChao Yu et->cached_en = en;
49142926744SJaegeuk Kim }
492e7547dacSJaegeuk Kim spin_unlock(&eti->extent_lock);
493a28ef1f5SChao Yu ret = true;
494a28ef1f5SChao Yu out:
495e7547dacSJaegeuk Kim stat_inc_total_hit(sbi, type);
496a28ef1f5SChao Yu read_unlock(&et->lock);
497a28ef1f5SChao Yu
498e7547dacSJaegeuk Kim if (type == EX_READ)
499e7547dacSJaegeuk Kim trace_f2fs_lookup_read_extent_tree_end(inode, pgofs, ei);
50071644dffSJaegeuk Kim else if (type == EX_BLOCK_AGE)
50171644dffSJaegeuk Kim trace_f2fs_lookup_age_extent_tree_end(inode, pgofs, ei);
502a28ef1f5SChao Yu return ret;
503a28ef1f5SChao Yu }
504a28ef1f5SChao Yu
__try_merge_extent_node(struct f2fs_sb_info * sbi,struct extent_tree * et,struct extent_info * ei,struct extent_node * prev_ex,struct extent_node * next_ex)505b430f726SZhikang Zhang static struct extent_node *__try_merge_extent_node(struct f2fs_sb_info *sbi,
5060f825ee6SFan Li struct extent_tree *et, struct extent_info *ei,
5070f825ee6SFan Li struct extent_node *prev_ex,
508ef05e221SChao Yu struct extent_node *next_ex)
5090f825ee6SFan Li {
510e7547dacSJaegeuk Kim struct extent_tree_info *eti = &sbi->extent_tree[et->type];
5110f825ee6SFan Li struct extent_node *en = NULL;
5120f825ee6SFan Li
513e7547dacSJaegeuk Kim if (prev_ex && __is_back_mergeable(ei, &prev_ex->ei, et->type)) {
5140f825ee6SFan Li prev_ex->ei.len += ei->len;
5150f825ee6SFan Li ei = &prev_ex->ei;
5160f825ee6SFan Li en = prev_ex;
5170f825ee6SFan Li }
518ef05e221SChao Yu
519e7547dacSJaegeuk Kim if (next_ex && __is_front_mergeable(ei, &next_ex->ei, et->type)) {
5200f825ee6SFan Li next_ex->ei.fofs = ei->fofs;
5210f825ee6SFan Li next_ex->ei.len += ei->len;
522e7547dacSJaegeuk Kim if (et->type == EX_READ)
523e7547dacSJaegeuk Kim next_ex->ei.blk = ei->blk;
5247855eba4SYunlei He if (en)
5257855eba4SYunlei He __release_extent_node(sbi, et, prev_ex);
5267855eba4SYunlei He
5270f825ee6SFan Li en = next_ex;
5280f825ee6SFan Li }
529ef05e221SChao Yu
53043a2fa18SJaegeuk Kim if (!en)
53143a2fa18SJaegeuk Kim return NULL;
53243a2fa18SJaegeuk Kim
533b430f726SZhikang Zhang __try_update_largest_extent(et, en);
53443a2fa18SJaegeuk Kim
535e7547dacSJaegeuk Kim spin_lock(&eti->extent_lock);
53642926744SJaegeuk Kim if (!list_empty(&en->list)) {
537e7547dacSJaegeuk Kim list_move_tail(&en->list, &eti->extent_list);
53842926744SJaegeuk Kim et->cached_en = en;
53942926744SJaegeuk Kim }
540e7547dacSJaegeuk Kim spin_unlock(&eti->extent_lock);
541ef05e221SChao Yu return en;
542ef05e221SChao Yu }
543ef05e221SChao Yu
__insert_extent_tree(struct f2fs_sb_info * sbi,struct extent_tree * et,struct extent_info * ei,struct rb_node ** insert_p,struct rb_node * insert_parent,bool leftmost)544b430f726SZhikang Zhang static struct extent_node *__insert_extent_tree(struct f2fs_sb_info *sbi,
545ef05e221SChao Yu struct extent_tree *et, struct extent_info *ei,
546ef05e221SChao Yu struct rb_node **insert_p,
5474dada3fdSChao Yu struct rb_node *insert_parent,
5484dada3fdSChao Yu bool leftmost)
549ef05e221SChao Yu {
550e7547dacSJaegeuk Kim struct extent_tree_info *eti = &sbi->extent_tree[et->type];
551bf21acf9SJaegeuk Kim struct rb_node **p = &et->root.rb_root.rb_node;
552ef05e221SChao Yu struct rb_node *parent = NULL;
553ef05e221SChao Yu struct extent_node *en = NULL;
5540f825ee6SFan Li
5550f825ee6SFan Li if (insert_p && insert_parent) {
5560f825ee6SFan Li parent = insert_parent;
5570f825ee6SFan Li p = insert_p;
5580f825ee6SFan Li goto do_insert;
5590f825ee6SFan Li }
5600f825ee6SFan Li
5614dada3fdSChao Yu leftmost = true;
5624dada3fdSChao Yu
563bf21acf9SJaegeuk Kim /* look up extent_node in the rb tree */
564bf21acf9SJaegeuk Kim while (*p) {
565bf21acf9SJaegeuk Kim parent = *p;
566bf21acf9SJaegeuk Kim en = rb_entry(parent, struct extent_node, rb_node);
567bf21acf9SJaegeuk Kim
568bf21acf9SJaegeuk Kim if (ei->fofs < en->ei.fofs) {
569bf21acf9SJaegeuk Kim p = &(*p)->rb_left;
570bf21acf9SJaegeuk Kim } else if (ei->fofs >= en->ei.fofs + en->ei.len) {
571bf21acf9SJaegeuk Kim p = &(*p)->rb_right;
572bf21acf9SJaegeuk Kim leftmost = false;
573bf21acf9SJaegeuk Kim } else {
574bf21acf9SJaegeuk Kim f2fs_bug_on(sbi, 1);
575bf21acf9SJaegeuk Kim }
576bf21acf9SJaegeuk Kim }
577bf21acf9SJaegeuk Kim
5780f825ee6SFan Li do_insert:
5794dada3fdSChao Yu en = __attach_extent_node(sbi, et, ei, parent, p, leftmost);
5800f825ee6SFan Li if (!en)
5810f825ee6SFan Li return NULL;
582ef05e221SChao Yu
583b430f726SZhikang Zhang __try_update_largest_extent(et, en);
58443a2fa18SJaegeuk Kim
58543a2fa18SJaegeuk Kim /* update in global extent list */
586e7547dacSJaegeuk Kim spin_lock(&eti->extent_lock);
587e7547dacSJaegeuk Kim list_add_tail(&en->list, &eti->extent_list);
58842926744SJaegeuk Kim et->cached_en = en;
589e7547dacSJaegeuk Kim spin_unlock(&eti->extent_lock);
5900f825ee6SFan Li return en;
5910f825ee6SFan Li }
5920f825ee6SFan Li
__update_extent_tree_range(struct inode * inode,struct extent_info * tei,enum extent_type type)593e7547dacSJaegeuk Kim static void __update_extent_tree_range(struct inode *inode,
594e7547dacSJaegeuk Kim struct extent_info *tei, enum extent_type type)
595a28ef1f5SChao Yu {
596a28ef1f5SChao Yu struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
597e7547dacSJaegeuk Kim struct extent_tree *et = F2FS_I(inode)->extent_tree[type];
5984d1fa815SFan Li struct extent_node *en = NULL, *en1 = NULL;
59919b2c30dSChao Yu struct extent_node *prev_en = NULL, *next_en = NULL;
600a28ef1f5SChao Yu struct extent_info ei, dei, prev;
6010f825ee6SFan Li struct rb_node **insert_p = NULL, *insert_parent = NULL;
602e7547dacSJaegeuk Kim unsigned int fofs = tei->fofs, len = tei->len;
60319b2c30dSChao Yu unsigned int end = fofs + len;
604b430f726SZhikang Zhang bool updated = false;
605f9aa52a8SChao Yu bool leftmost = false;
606a28ef1f5SChao Yu
607a28ef1f5SChao Yu if (!et)
608317e1300SChao Yu return;
609a28ef1f5SChao Yu
610e7547dacSJaegeuk Kim if (type == EX_READ)
611e7547dacSJaegeuk Kim trace_f2fs_update_read_extent_tree_range(inode, fofs, len,
612e7547dacSJaegeuk Kim tei->blk, 0);
61371644dffSJaegeuk Kim else if (type == EX_BLOCK_AGE)
61471644dffSJaegeuk Kim trace_f2fs_update_age_extent_tree_range(inode, fofs, len,
61571644dffSJaegeuk Kim tei->age, tei->last_blocks);
61671644dffSJaegeuk Kim
617a28ef1f5SChao Yu write_lock(&et->lock);
618a28ef1f5SChao Yu
619e7547dacSJaegeuk Kim if (type == EX_READ) {
62091942321SJaegeuk Kim if (is_inode_flag_set(inode, FI_NO_EXTENT)) {
621a28ef1f5SChao Yu write_unlock(&et->lock);
622317e1300SChao Yu return;
623a28ef1f5SChao Yu }
624a28ef1f5SChao Yu
625a28ef1f5SChao Yu prev = et->largest;
626a28ef1f5SChao Yu dei.len = 0;
627a28ef1f5SChao Yu
6284d1fa815SFan Li /*
6294d1fa815SFan Li * drop largest extent before lookup, in case it's already
6304d1fa815SFan Li * been shrunk from extent tree
6314d1fa815SFan Li */
632b430f726SZhikang Zhang __drop_largest_extent(et, fofs, len);
633e7547dacSJaegeuk Kim }
634a28ef1f5SChao Yu
63519b2c30dSChao Yu /* 1. lookup first extent node in range [fofs, fofs + len - 1] */
636bf21acf9SJaegeuk Kim en = __lookup_extent_node_ret(&et->root,
637bf21acf9SJaegeuk Kim et->cached_en, fofs,
638bf21acf9SJaegeuk Kim &prev_en, &next_en,
639bf21acf9SJaegeuk Kim &insert_p, &insert_parent,
6404dada3fdSChao Yu &leftmost);
6414d1fa815SFan Li if (!en)
64219b2c30dSChao Yu en = next_en;
64319b2c30dSChao Yu
644146949deSJinyoung CHOI /* 2. invalidate all extent nodes in range [fofs, fofs + len - 1] */
6454d1fa815SFan Li while (en && en->ei.fofs < end) {
6464d1fa815SFan Li unsigned int org_end;
6474d1fa815SFan Li int parts = 0; /* # of parts current extent split into */
64819b2c30dSChao Yu
6494d1fa815SFan Li next_en = en1 = NULL;
650a28ef1f5SChao Yu
651a28ef1f5SChao Yu dei = en->ei;
6524d1fa815SFan Li org_end = dei.fofs + dei.len;
653e7547dacSJaegeuk Kim f2fs_bug_on(sbi, fofs >= org_end);
65419b2c30dSChao Yu
655e7547dacSJaegeuk Kim if (fofs > dei.fofs && (type != EX_READ ||
656e7547dacSJaegeuk Kim fofs - dei.fofs >= F2FS_MIN_EXTENT_LEN)) {
657e7547dacSJaegeuk Kim en->ei.len = fofs - en->ei.fofs;
6584d1fa815SFan Li prev_en = en;
6594d1fa815SFan Li parts = 1;
66019b2c30dSChao Yu }
66119b2c30dSChao Yu
662e7547dacSJaegeuk Kim if (end < org_end && (type != EX_READ ||
663e7547dacSJaegeuk Kim org_end - end >= F2FS_MIN_EXTENT_LEN)) {
6644d1fa815SFan Li if (parts) {
6653bac20a8SJaegeuk Kim __set_extent_info(&ei,
6663bac20a8SJaegeuk Kim end, org_end - end,
667e7547dacSJaegeuk Kim end - dei.fofs + dei.blk, false,
66871644dffSJaegeuk Kim dei.age, dei.last_blocks,
669e7547dacSJaegeuk Kim type);
670b430f726SZhikang Zhang en1 = __insert_extent_tree(sbi, et, &ei,
6714dada3fdSChao Yu NULL, NULL, true);
6724d1fa815SFan Li next_en = en1;
6734d1fa815SFan Li } else {
6743bac20a8SJaegeuk Kim __set_extent_info(&en->ei,
6753bac20a8SJaegeuk Kim end, en->ei.len - (end - dei.fofs),
676e7547dacSJaegeuk Kim en->ei.blk + (end - dei.fofs), true,
67771644dffSJaegeuk Kim dei.age, dei.last_blocks,
678e7547dacSJaegeuk Kim type);
6794d1fa815SFan Li next_en = en;
6804d1fa815SFan Li }
6814d1fa815SFan Li parts++;
68219b2c30dSChao Yu }
68319b2c30dSChao Yu
6844d1fa815SFan Li if (!next_en) {
6854d1fa815SFan Li struct rb_node *node = rb_next(&en->rb_node);
6864d1fa815SFan Li
687ed0b5620SGeliang Tang next_en = rb_entry_safe(node, struct extent_node,
688ed0b5620SGeliang Tang rb_node);
6894d1fa815SFan Li }
6904d1fa815SFan Li
6914abd3f5aSChao Yu if (parts)
692b430f726SZhikang Zhang __try_update_largest_extent(et, en);
6934abd3f5aSChao Yu else
694a03f01f2SHou Pengyang __release_extent_node(sbi, et, en);
69519b2c30dSChao Yu
69619b2c30dSChao Yu /*
6974d1fa815SFan Li * if original extent is split into zero or two parts, extent
6984d1fa815SFan Li * tree has been altered by deletion or insertion, therefore
6994d1fa815SFan Li * invalidate pointers regard to tree.
70019b2c30dSChao Yu */
7014d1fa815SFan Li if (parts != 1) {
70219b2c30dSChao Yu insert_p = NULL;
70319b2c30dSChao Yu insert_parent = NULL;
70419b2c30dSChao Yu }
7054d1fa815SFan Li en = next_en;
70619b2c30dSChao Yu }
707a28ef1f5SChao Yu
70871644dffSJaegeuk Kim if (type == EX_BLOCK_AGE)
70971644dffSJaegeuk Kim goto update_age_extent_cache;
71071644dffSJaegeuk Kim
711e7547dacSJaegeuk Kim /* 3. update extent in read extent cache */
712e7547dacSJaegeuk Kim BUG_ON(type != EX_READ);
713e7547dacSJaegeuk Kim
714e7547dacSJaegeuk Kim if (tei->blk) {
71571644dffSJaegeuk Kim __set_extent_info(&ei, fofs, len, tei->blk, false,
71671644dffSJaegeuk Kim 0, 0, EX_READ);
717b430f726SZhikang Zhang if (!__try_merge_extent_node(sbi, et, &ei, prev_en, next_en))
718b430f726SZhikang Zhang __insert_extent_tree(sbi, et, &ei,
7194dada3fdSChao Yu insert_p, insert_parent, leftmost);
720a28ef1f5SChao Yu
721a28ef1f5SChao Yu /* give up extent_cache, if split and small updates happen */
722a28ef1f5SChao Yu if (dei.len >= 1 &&
723a28ef1f5SChao Yu prev.len < F2FS_MIN_EXTENT_LEN &&
724a28ef1f5SChao Yu et->largest.len < F2FS_MIN_EXTENT_LEN) {
725b430f726SZhikang Zhang et->largest.len = 0;
726b430f726SZhikang Zhang et->largest_updated = true;
72791942321SJaegeuk Kim set_inode_flag(inode, FI_NO_EXTENT);
728a28ef1f5SChao Yu }
72919b2c30dSChao Yu }
730a28ef1f5SChao Yu
73191942321SJaegeuk Kim if (is_inode_flag_set(inode, FI_NO_EXTENT))
732201ef5e0SHou Pengyang __free_extent_tree(sbi, et);
733a28ef1f5SChao Yu
734b430f726SZhikang Zhang if (et->largest_updated) {
735b430f726SZhikang Zhang et->largest_updated = false;
736b430f726SZhikang Zhang updated = true;
737b430f726SZhikang Zhang }
73871644dffSJaegeuk Kim goto out_read_extent_cache;
73971644dffSJaegeuk Kim update_age_extent_cache:
74071644dffSJaegeuk Kim if (!tei->last_blocks)
74171644dffSJaegeuk Kim goto out_read_extent_cache;
742b430f726SZhikang Zhang
74371644dffSJaegeuk Kim __set_extent_info(&ei, fofs, len, 0, false,
74471644dffSJaegeuk Kim tei->age, tei->last_blocks, EX_BLOCK_AGE);
74571644dffSJaegeuk Kim if (!__try_merge_extent_node(sbi, et, &ei, prev_en, next_en))
74671644dffSJaegeuk Kim __insert_extent_tree(sbi, et, &ei,
74771644dffSJaegeuk Kim insert_p, insert_parent, leftmost);
74871644dffSJaegeuk Kim out_read_extent_cache:
749a28ef1f5SChao Yu write_unlock(&et->lock);
750b430f726SZhikang Zhang
751b430f726SZhikang Zhang if (updated)
752b430f726SZhikang Zhang f2fs_mark_inode_dirty_sync(inode, true);
753a28ef1f5SChao Yu }
754a28ef1f5SChao Yu
75594afd6d6SChao Yu #ifdef CONFIG_F2FS_FS_COMPRESSION
f2fs_update_read_extent_tree_range_compressed(struct inode * inode,pgoff_t fofs,block_t blkaddr,unsigned int llen,unsigned int c_len)756e7547dacSJaegeuk Kim void f2fs_update_read_extent_tree_range_compressed(struct inode *inode,
75794afd6d6SChao Yu pgoff_t fofs, block_t blkaddr, unsigned int llen,
75894afd6d6SChao Yu unsigned int c_len)
75994afd6d6SChao Yu {
76094afd6d6SChao Yu struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
761e7547dacSJaegeuk Kim struct extent_tree *et = F2FS_I(inode)->extent_tree[EX_READ];
76294afd6d6SChao Yu struct extent_node *en = NULL;
76394afd6d6SChao Yu struct extent_node *prev_en = NULL, *next_en = NULL;
76494afd6d6SChao Yu struct extent_info ei;
76594afd6d6SChao Yu struct rb_node **insert_p = NULL, *insert_parent = NULL;
76694afd6d6SChao Yu bool leftmost = false;
76794afd6d6SChao Yu
768e7547dacSJaegeuk Kim trace_f2fs_update_read_extent_tree_range(inode, fofs, llen,
769e7547dacSJaegeuk Kim blkaddr, c_len);
77094afd6d6SChao Yu
77194afd6d6SChao Yu /* it is safe here to check FI_NO_EXTENT w/o et->lock in ro image */
77294afd6d6SChao Yu if (is_inode_flag_set(inode, FI_NO_EXTENT))
77394afd6d6SChao Yu return;
77494afd6d6SChao Yu
77594afd6d6SChao Yu write_lock(&et->lock);
77694afd6d6SChao Yu
777bf21acf9SJaegeuk Kim en = __lookup_extent_node_ret(&et->root,
778bf21acf9SJaegeuk Kim et->cached_en, fofs,
779bf21acf9SJaegeuk Kim &prev_en, &next_en,
780bf21acf9SJaegeuk Kim &insert_p, &insert_parent,
78194afd6d6SChao Yu &leftmost);
78294afd6d6SChao Yu if (en)
78394afd6d6SChao Yu goto unlock_out;
78494afd6d6SChao Yu
78571644dffSJaegeuk Kim __set_extent_info(&ei, fofs, llen, blkaddr, true, 0, 0, EX_READ);
78694afd6d6SChao Yu ei.c_len = c_len;
78794afd6d6SChao Yu
78894afd6d6SChao Yu if (!__try_merge_extent_node(sbi, et, &ei, prev_en, next_en))
78994afd6d6SChao Yu __insert_extent_tree(sbi, et, &ei,
79094afd6d6SChao Yu insert_p, insert_parent, leftmost);
79194afd6d6SChao Yu unlock_out:
79294afd6d6SChao Yu write_unlock(&et->lock);
79394afd6d6SChao Yu }
79494afd6d6SChao Yu #endif
79594afd6d6SChao Yu
__calculate_block_age(struct f2fs_sb_info * sbi,unsigned long long new,unsigned long long old)796d23be468Sqixiaoyu1 static unsigned long long __calculate_block_age(struct f2fs_sb_info *sbi,
797d23be468Sqixiaoyu1 unsigned long long new,
79871644dffSJaegeuk Kim unsigned long long old)
79971644dffSJaegeuk Kim {
800b03a41a4Sqixiaoyu1 unsigned int rem_old, rem_new;
801b03a41a4Sqixiaoyu1 unsigned long long res;
802d23be468Sqixiaoyu1 unsigned int weight = sbi->last_age_weight;
80371644dffSJaegeuk Kim
804d23be468Sqixiaoyu1 res = div_u64_rem(new, 100, &rem_new) * (100 - weight)
805d23be468Sqixiaoyu1 + div_u64_rem(old, 100, &rem_old) * weight;
80671644dffSJaegeuk Kim
807b03a41a4Sqixiaoyu1 if (rem_new)
808d23be468Sqixiaoyu1 res += rem_new * (100 - weight) / 100;
809b03a41a4Sqixiaoyu1 if (rem_old)
810d23be468Sqixiaoyu1 res += rem_old * weight / 100;
811b03a41a4Sqixiaoyu1
812b03a41a4Sqixiaoyu1 return res;
81371644dffSJaegeuk Kim }
81471644dffSJaegeuk Kim
81571644dffSJaegeuk Kim /* This returns a new age and allocated blocks in ei */
__get_new_block_age(struct inode * inode,struct extent_info * ei,block_t blkaddr)816ed272476SJaegeuk Kim static int __get_new_block_age(struct inode *inode, struct extent_info *ei,
817ed272476SJaegeuk Kim block_t blkaddr)
81871644dffSJaegeuk Kim {
81971644dffSJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
82071644dffSJaegeuk Kim loff_t f_size = i_size_read(inode);
82171644dffSJaegeuk Kim unsigned long long cur_blocks =
82271644dffSJaegeuk Kim atomic64_read(&sbi->allocated_data_blocks);
82322a341b4SJaegeuk Kim struct extent_info tei = *ei; /* only fofs and len are valid */
82471644dffSJaegeuk Kim
82571644dffSJaegeuk Kim /*
82671644dffSJaegeuk Kim * When I/O is not aligned to a PAGE_SIZE, update will happen to the last
82771644dffSJaegeuk Kim * file block even in seq write. So don't record age for newly last file
82871644dffSJaegeuk Kim * block here.
82971644dffSJaegeuk Kim */
83071644dffSJaegeuk Kim if ((f_size >> PAGE_SHIFT) == ei->fofs && f_size & (PAGE_SIZE - 1) &&
831ed272476SJaegeuk Kim blkaddr == NEW_ADDR)
83271644dffSJaegeuk Kim return -EINVAL;
83371644dffSJaegeuk Kim
83422a341b4SJaegeuk Kim if (__lookup_extent_tree(inode, ei->fofs, &tei, EX_BLOCK_AGE)) {
83571644dffSJaegeuk Kim unsigned long long cur_age;
83671644dffSJaegeuk Kim
83722a341b4SJaegeuk Kim if (cur_blocks >= tei.last_blocks)
83822a341b4SJaegeuk Kim cur_age = cur_blocks - tei.last_blocks;
83971644dffSJaegeuk Kim else
84071644dffSJaegeuk Kim /* allocated_data_blocks overflow */
84122a341b4SJaegeuk Kim cur_age = ULLONG_MAX - tei.last_blocks + cur_blocks;
84271644dffSJaegeuk Kim
84322a341b4SJaegeuk Kim if (tei.age)
844d23be468Sqixiaoyu1 ei->age = __calculate_block_age(sbi, cur_age, tei.age);
84571644dffSJaegeuk Kim else
84671644dffSJaegeuk Kim ei->age = cur_age;
84771644dffSJaegeuk Kim ei->last_blocks = cur_blocks;
84871644dffSJaegeuk Kim WARN_ON(ei->age > cur_blocks);
84971644dffSJaegeuk Kim return 0;
85071644dffSJaegeuk Kim }
85171644dffSJaegeuk Kim
852ed272476SJaegeuk Kim f2fs_bug_on(sbi, blkaddr == NULL_ADDR);
85371644dffSJaegeuk Kim
85471644dffSJaegeuk Kim /* the data block was allocated for the first time */
855ed272476SJaegeuk Kim if (blkaddr == NEW_ADDR)
85671644dffSJaegeuk Kim goto out;
85771644dffSJaegeuk Kim
858ed272476SJaegeuk Kim if (__is_valid_data_blkaddr(blkaddr) &&
859ed272476SJaegeuk Kim !f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC_ENHANCE)) {
86071644dffSJaegeuk Kim f2fs_bug_on(sbi, 1);
86171644dffSJaegeuk Kim return -EINVAL;
86271644dffSJaegeuk Kim }
86371644dffSJaegeuk Kim out:
86471644dffSJaegeuk Kim /*
86571644dffSJaegeuk Kim * init block age with zero, this can happen when the block age extent
86671644dffSJaegeuk Kim * was reclaimed due to memory constraint or system reboot
86771644dffSJaegeuk Kim */
86871644dffSJaegeuk Kim ei->age = 0;
86971644dffSJaegeuk Kim ei->last_blocks = cur_blocks;
87071644dffSJaegeuk Kim return 0;
87171644dffSJaegeuk Kim }
87271644dffSJaegeuk Kim
__update_extent_cache(struct dnode_of_data * dn,enum extent_type type)873e7547dacSJaegeuk Kim static void __update_extent_cache(struct dnode_of_data *dn, enum extent_type type)
874a28ef1f5SChao Yu {
875fe59109aSJaegeuk Kim struct extent_info ei = {};
876e7547dacSJaegeuk Kim
877e7547dacSJaegeuk Kim if (!__may_extent_tree(dn->inode, type))
878e7547dacSJaegeuk Kim return;
879e7547dacSJaegeuk Kim
880e7547dacSJaegeuk Kim ei.fofs = f2fs_start_bidx_of_node(ofs_of_node(dn->node_page), dn->inode) +
881e7547dacSJaegeuk Kim dn->ofs_in_node;
882e7547dacSJaegeuk Kim ei.len = 1;
883e7547dacSJaegeuk Kim
884e7547dacSJaegeuk Kim if (type == EX_READ) {
885e7547dacSJaegeuk Kim if (dn->data_blkaddr == NEW_ADDR)
886e7547dacSJaegeuk Kim ei.blk = NULL_ADDR;
887e7547dacSJaegeuk Kim else
888e7547dacSJaegeuk Kim ei.blk = dn->data_blkaddr;
88971644dffSJaegeuk Kim } else if (type == EX_BLOCK_AGE) {
890ed272476SJaegeuk Kim if (__get_new_block_age(dn->inode, &ei, dn->data_blkaddr))
89171644dffSJaegeuk Kim return;
892e7547dacSJaegeuk Kim }
893e7547dacSJaegeuk Kim __update_extent_tree_range(dn->inode, &ei, type);
894e7547dacSJaegeuk Kim }
895e7547dacSJaegeuk Kim
__shrink_extent_tree(struct f2fs_sb_info * sbi,int nr_shrink,enum extent_type type)896e7547dacSJaegeuk Kim static unsigned int __shrink_extent_tree(struct f2fs_sb_info *sbi, int nr_shrink,
897e7547dacSJaegeuk Kim enum extent_type type)
898e7547dacSJaegeuk Kim {
899e7547dacSJaegeuk Kim struct extent_tree_info *eti = &sbi->extent_tree[type];
900137d09f0SJaegeuk Kim struct extent_tree *et, *next;
901201ef5e0SHou Pengyang struct extent_node *en;
902a28ef1f5SChao Yu unsigned int node_cnt = 0, tree_cnt = 0;
903a28ef1f5SChao Yu int remained;
904a28ef1f5SChao Yu
905e7547dacSJaegeuk Kim if (!atomic_read(&eti->total_zombie_tree))
90674fd8d99SJaegeuk Kim goto free_node;
90774fd8d99SJaegeuk Kim
908e7547dacSJaegeuk Kim if (!mutex_trylock(&eti->extent_tree_lock))
909a28ef1f5SChao Yu goto out;
910a28ef1f5SChao Yu
911a28ef1f5SChao Yu /* 1. remove unreferenced extent tree */
912e7547dacSJaegeuk Kim list_for_each_entry_safe(et, next, &eti->zombie_list, list) {
9139b72a388SChao Yu if (atomic_read(&et->node_cnt)) {
914a28ef1f5SChao Yu write_lock(&et->lock);
915201ef5e0SHou Pengyang node_cnt += __free_extent_tree(sbi, et);
916a28ef1f5SChao Yu write_unlock(&et->lock);
9179b72a388SChao Yu }
918201ef5e0SHou Pengyang f2fs_bug_on(sbi, atomic_read(&et->node_cnt));
919137d09f0SJaegeuk Kim list_del_init(&et->list);
920e7547dacSJaegeuk Kim radix_tree_delete(&eti->extent_tree_root, et->ino);
921a28ef1f5SChao Yu kmem_cache_free(extent_tree_slab, et);
922e7547dacSJaegeuk Kim atomic_dec(&eti->total_ext_tree);
923e7547dacSJaegeuk Kim atomic_dec(&eti->total_zombie_tree);
924a28ef1f5SChao Yu tree_cnt++;
925a28ef1f5SChao Yu
926a28ef1f5SChao Yu if (node_cnt + tree_cnt >= nr_shrink)
927a28ef1f5SChao Yu goto unlock_out;
9286fe2bc95SJaegeuk Kim cond_resched();
929a28ef1f5SChao Yu }
930e7547dacSJaegeuk Kim mutex_unlock(&eti->extent_tree_lock);
931a28ef1f5SChao Yu
93274fd8d99SJaegeuk Kim free_node:
933a28ef1f5SChao Yu /* 2. remove LRU extent entries */
934e7547dacSJaegeuk Kim if (!mutex_trylock(&eti->extent_tree_lock))
935a28ef1f5SChao Yu goto out;
936a28ef1f5SChao Yu
937a28ef1f5SChao Yu remained = nr_shrink - (node_cnt + tree_cnt);
938a28ef1f5SChao Yu
939e7547dacSJaegeuk Kim spin_lock(&eti->extent_lock);
940201ef5e0SHou Pengyang for (; remained > 0; remained--) {
941e7547dacSJaegeuk Kim if (list_empty(&eti->extent_list))
942a28ef1f5SChao Yu break;
943e7547dacSJaegeuk Kim en = list_first_entry(&eti->extent_list,
944201ef5e0SHou Pengyang struct extent_node, list);
945201ef5e0SHou Pengyang et = en->et;
946201ef5e0SHou Pengyang if (!write_trylock(&et->lock)) {
947201ef5e0SHou Pengyang /* refresh this extent node's position in extent list */
948e7547dacSJaegeuk Kim list_move_tail(&en->list, &eti->extent_list);
949201ef5e0SHou Pengyang continue;
950201ef5e0SHou Pengyang }
951201ef5e0SHou Pengyang
952a28ef1f5SChao Yu list_del_init(&en->list);
953e7547dacSJaegeuk Kim spin_unlock(&eti->extent_lock);
954201ef5e0SHou Pengyang
955201ef5e0SHou Pengyang __detach_extent_node(sbi, et, en);
956201ef5e0SHou Pengyang
957201ef5e0SHou Pengyang write_unlock(&et->lock);
958201ef5e0SHou Pengyang node_cnt++;
959e7547dacSJaegeuk Kim spin_lock(&eti->extent_lock);
960a28ef1f5SChao Yu }
961e7547dacSJaegeuk Kim spin_unlock(&eti->extent_lock);
962a28ef1f5SChao Yu
963a28ef1f5SChao Yu unlock_out:
964e7547dacSJaegeuk Kim mutex_unlock(&eti->extent_tree_lock);
965a28ef1f5SChao Yu out:
966e7547dacSJaegeuk Kim trace_f2fs_shrink_extent_tree(sbi, node_cnt, tree_cnt, type);
967a28ef1f5SChao Yu
968a28ef1f5SChao Yu return node_cnt + tree_cnt;
969a28ef1f5SChao Yu }
970a28ef1f5SChao Yu
971e7547dacSJaegeuk Kim /* read extent cache operations */
f2fs_lookup_read_extent_cache(struct inode * inode,pgoff_t pgofs,struct extent_info * ei)972e7547dacSJaegeuk Kim bool f2fs_lookup_read_extent_cache(struct inode *inode, pgoff_t pgofs,
973e7547dacSJaegeuk Kim struct extent_info *ei)
974e7547dacSJaegeuk Kim {
975e7547dacSJaegeuk Kim if (!__may_extent_tree(inode, EX_READ))
976e7547dacSJaegeuk Kim return false;
977e7547dacSJaegeuk Kim
978e7547dacSJaegeuk Kim return __lookup_extent_tree(inode, pgofs, ei, EX_READ);
979e7547dacSJaegeuk Kim }
980e7547dacSJaegeuk Kim
f2fs_lookup_read_extent_cache_block(struct inode * inode,pgoff_t index,block_t * blkaddr)98104a91ab0SChristoph Hellwig bool f2fs_lookup_read_extent_cache_block(struct inode *inode, pgoff_t index,
98204a91ab0SChristoph Hellwig block_t *blkaddr)
98304a91ab0SChristoph Hellwig {
98404a91ab0SChristoph Hellwig struct extent_info ei = {};
98504a91ab0SChristoph Hellwig
98604a91ab0SChristoph Hellwig if (!f2fs_lookup_read_extent_cache(inode, index, &ei))
98704a91ab0SChristoph Hellwig return false;
98804a91ab0SChristoph Hellwig *blkaddr = ei.blk + index - ei.fofs;
98904a91ab0SChristoph Hellwig return true;
99004a91ab0SChristoph Hellwig }
99104a91ab0SChristoph Hellwig
f2fs_update_read_extent_cache(struct dnode_of_data * dn)992e7547dacSJaegeuk Kim void f2fs_update_read_extent_cache(struct dnode_of_data *dn)
993e7547dacSJaegeuk Kim {
994e7547dacSJaegeuk Kim return __update_extent_cache(dn, EX_READ);
995e7547dacSJaegeuk Kim }
996e7547dacSJaegeuk Kim
f2fs_update_read_extent_cache_range(struct dnode_of_data * dn,pgoff_t fofs,block_t blkaddr,unsigned int len)997e7547dacSJaegeuk Kim void f2fs_update_read_extent_cache_range(struct dnode_of_data *dn,
998e7547dacSJaegeuk Kim pgoff_t fofs, block_t blkaddr, unsigned int len)
999e7547dacSJaegeuk Kim {
1000e7547dacSJaegeuk Kim struct extent_info ei = {
1001e7547dacSJaegeuk Kim .fofs = fofs,
1002e7547dacSJaegeuk Kim .len = len,
1003e7547dacSJaegeuk Kim .blk = blkaddr,
1004e7547dacSJaegeuk Kim };
1005e7547dacSJaegeuk Kim
1006e7547dacSJaegeuk Kim if (!__may_extent_tree(dn->inode, EX_READ))
1007e7547dacSJaegeuk Kim return;
1008e7547dacSJaegeuk Kim
1009e7547dacSJaegeuk Kim __update_extent_tree_range(dn->inode, &ei, EX_READ);
1010e7547dacSJaegeuk Kim }
1011e7547dacSJaegeuk Kim
f2fs_shrink_read_extent_tree(struct f2fs_sb_info * sbi,int nr_shrink)1012e7547dacSJaegeuk Kim unsigned int f2fs_shrink_read_extent_tree(struct f2fs_sb_info *sbi, int nr_shrink)
1013e7547dacSJaegeuk Kim {
1014e7547dacSJaegeuk Kim if (!test_opt(sbi, READ_EXTENT_CACHE))
1015e7547dacSJaegeuk Kim return 0;
1016e7547dacSJaegeuk Kim
1017e7547dacSJaegeuk Kim return __shrink_extent_tree(sbi, nr_shrink, EX_READ);
1018e7547dacSJaegeuk Kim }
1019e7547dacSJaegeuk Kim
102071644dffSJaegeuk Kim /* block age extent cache operations */
f2fs_lookup_age_extent_cache(struct inode * inode,pgoff_t pgofs,struct extent_info * ei)102171644dffSJaegeuk Kim bool f2fs_lookup_age_extent_cache(struct inode *inode, pgoff_t pgofs,
102271644dffSJaegeuk Kim struct extent_info *ei)
102371644dffSJaegeuk Kim {
102471644dffSJaegeuk Kim if (!__may_extent_tree(inode, EX_BLOCK_AGE))
102571644dffSJaegeuk Kim return false;
102671644dffSJaegeuk Kim
102771644dffSJaegeuk Kim return __lookup_extent_tree(inode, pgofs, ei, EX_BLOCK_AGE);
102871644dffSJaegeuk Kim }
102971644dffSJaegeuk Kim
f2fs_update_age_extent_cache(struct dnode_of_data * dn)103071644dffSJaegeuk Kim void f2fs_update_age_extent_cache(struct dnode_of_data *dn)
103171644dffSJaegeuk Kim {
103271644dffSJaegeuk Kim return __update_extent_cache(dn, EX_BLOCK_AGE);
103371644dffSJaegeuk Kim }
103471644dffSJaegeuk Kim
f2fs_update_age_extent_cache_range(struct dnode_of_data * dn,pgoff_t fofs,unsigned int len)103571644dffSJaegeuk Kim void f2fs_update_age_extent_cache_range(struct dnode_of_data *dn,
103671644dffSJaegeuk Kim pgoff_t fofs, unsigned int len)
103771644dffSJaegeuk Kim {
103871644dffSJaegeuk Kim struct extent_info ei = {
103971644dffSJaegeuk Kim .fofs = fofs,
104071644dffSJaegeuk Kim .len = len,
104171644dffSJaegeuk Kim };
104271644dffSJaegeuk Kim
104371644dffSJaegeuk Kim if (!__may_extent_tree(dn->inode, EX_BLOCK_AGE))
104471644dffSJaegeuk Kim return;
104571644dffSJaegeuk Kim
104671644dffSJaegeuk Kim __update_extent_tree_range(dn->inode, &ei, EX_BLOCK_AGE);
104771644dffSJaegeuk Kim }
104871644dffSJaegeuk Kim
f2fs_shrink_age_extent_tree(struct f2fs_sb_info * sbi,int nr_shrink)104971644dffSJaegeuk Kim unsigned int f2fs_shrink_age_extent_tree(struct f2fs_sb_info *sbi, int nr_shrink)
105071644dffSJaegeuk Kim {
105171644dffSJaegeuk Kim if (!test_opt(sbi, AGE_EXTENT_CACHE))
105271644dffSJaegeuk Kim return 0;
105371644dffSJaegeuk Kim
105471644dffSJaegeuk Kim return __shrink_extent_tree(sbi, nr_shrink, EX_BLOCK_AGE);
105571644dffSJaegeuk Kim }
105671644dffSJaegeuk Kim
__destroy_extent_node(struct inode * inode,enum extent_type type)1057e7547dacSJaegeuk Kim static unsigned int __destroy_extent_node(struct inode *inode,
1058e7547dacSJaegeuk Kim enum extent_type type)
1059a28ef1f5SChao Yu {
1060a28ef1f5SChao Yu struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1061e7547dacSJaegeuk Kim struct extent_tree *et = F2FS_I(inode)->extent_tree[type];
1062a28ef1f5SChao Yu unsigned int node_cnt = 0;
1063a28ef1f5SChao Yu
10649b72a388SChao Yu if (!et || !atomic_read(&et->node_cnt))
1065a28ef1f5SChao Yu return 0;
1066a28ef1f5SChao Yu
1067a28ef1f5SChao Yu write_lock(&et->lock);
1068201ef5e0SHou Pengyang node_cnt = __free_extent_tree(sbi, et);
1069a28ef1f5SChao Yu write_unlock(&et->lock);
1070a28ef1f5SChao Yu
1071a28ef1f5SChao Yu return node_cnt;
1072a28ef1f5SChao Yu }
1073a28ef1f5SChao Yu
f2fs_destroy_extent_node(struct inode * inode)1074e7547dacSJaegeuk Kim void f2fs_destroy_extent_node(struct inode *inode)
1075e7547dacSJaegeuk Kim {
1076e7547dacSJaegeuk Kim __destroy_extent_node(inode, EX_READ);
107771644dffSJaegeuk Kim __destroy_extent_node(inode, EX_BLOCK_AGE);
1078e7547dacSJaegeuk Kim }
1079e7547dacSJaegeuk Kim
__drop_extent_tree(struct inode * inode,enum extent_type type)1080e7547dacSJaegeuk Kim static void __drop_extent_tree(struct inode *inode, enum extent_type type)
10815f281fabSJaegeuk Kim {
10825f281fabSJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1083e7547dacSJaegeuk Kim struct extent_tree *et = F2FS_I(inode)->extent_tree[type];
1084b430f726SZhikang Zhang bool updated = false;
10855f281fabSJaegeuk Kim
1086e7547dacSJaegeuk Kim if (!__may_extent_tree(inode, type))
1087bf617f7aSChao Yu return;
1088bf617f7aSChao Yu
10895f281fabSJaegeuk Kim write_lock(&et->lock);
10905f281fabSJaegeuk Kim __free_extent_tree(sbi, et);
1091e7547dacSJaegeuk Kim if (type == EX_READ) {
1092e7547dacSJaegeuk Kim set_inode_flag(inode, FI_NO_EXTENT);
1093b430f726SZhikang Zhang if (et->largest.len) {
1094b430f726SZhikang Zhang et->largest.len = 0;
1095b430f726SZhikang Zhang updated = true;
1096b430f726SZhikang Zhang }
1097e7547dacSJaegeuk Kim }
10985f281fabSJaegeuk Kim write_unlock(&et->lock);
1099b430f726SZhikang Zhang if (updated)
1100b430f726SZhikang Zhang f2fs_mark_inode_dirty_sync(inode, true);
11015f281fabSJaegeuk Kim }
11025f281fabSJaegeuk Kim
f2fs_drop_extent_tree(struct inode * inode)1103e7547dacSJaegeuk Kim void f2fs_drop_extent_tree(struct inode *inode)
1104e7547dacSJaegeuk Kim {
1105e7547dacSJaegeuk Kim __drop_extent_tree(inode, EX_READ);
110671644dffSJaegeuk Kim __drop_extent_tree(inode, EX_BLOCK_AGE);
1107e7547dacSJaegeuk Kim }
1108e7547dacSJaegeuk Kim
__destroy_extent_tree(struct inode * inode,enum extent_type type)1109e7547dacSJaegeuk Kim static void __destroy_extent_tree(struct inode *inode, enum extent_type type)
1110a28ef1f5SChao Yu {
1111a28ef1f5SChao Yu struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1112e7547dacSJaegeuk Kim struct extent_tree_info *eti = &sbi->extent_tree[type];
1113e7547dacSJaegeuk Kim struct extent_tree *et = F2FS_I(inode)->extent_tree[type];
1114a28ef1f5SChao Yu unsigned int node_cnt = 0;
1115a28ef1f5SChao Yu
1116a28ef1f5SChao Yu if (!et)
1117a28ef1f5SChao Yu return;
1118a28ef1f5SChao Yu
111968e35385SChao Yu if (inode->i_nlink && !is_bad_inode(inode) &&
112068e35385SChao Yu atomic_read(&et->node_cnt)) {
1121e7547dacSJaegeuk Kim mutex_lock(&eti->extent_tree_lock);
1122e7547dacSJaegeuk Kim list_add_tail(&et->list, &eti->zombie_list);
1123e7547dacSJaegeuk Kim atomic_inc(&eti->total_zombie_tree);
1124e7547dacSJaegeuk Kim mutex_unlock(&eti->extent_tree_lock);
1125a28ef1f5SChao Yu return;
1126a28ef1f5SChao Yu }
1127a28ef1f5SChao Yu
1128a28ef1f5SChao Yu /* free all extent info belong to this extent tree */
1129e7547dacSJaegeuk Kim node_cnt = __destroy_extent_node(inode, type);
1130a28ef1f5SChao Yu
1131a28ef1f5SChao Yu /* delete extent tree entry in radix tree */
1132e7547dacSJaegeuk Kim mutex_lock(&eti->extent_tree_lock);
113368e35385SChao Yu f2fs_bug_on(sbi, atomic_read(&et->node_cnt));
1134e7547dacSJaegeuk Kim radix_tree_delete(&eti->extent_tree_root, inode->i_ino);
1135a28ef1f5SChao Yu kmem_cache_free(extent_tree_slab, et);
1136e7547dacSJaegeuk Kim atomic_dec(&eti->total_ext_tree);
1137e7547dacSJaegeuk Kim mutex_unlock(&eti->extent_tree_lock);
1138a28ef1f5SChao Yu
1139e7547dacSJaegeuk Kim F2FS_I(inode)->extent_tree[type] = NULL;
1140a28ef1f5SChao Yu
1141e7547dacSJaegeuk Kim trace_f2fs_destroy_extent_tree(inode, node_cnt, type);
1142a28ef1f5SChao Yu }
1143a28ef1f5SChao Yu
f2fs_destroy_extent_tree(struct inode * inode)1144e7547dacSJaegeuk Kim void f2fs_destroy_extent_tree(struct inode *inode)
1145a28ef1f5SChao Yu {
1146e7547dacSJaegeuk Kim __destroy_extent_tree(inode, EX_READ);
114771644dffSJaegeuk Kim __destroy_extent_tree(inode, EX_BLOCK_AGE);
1148a28ef1f5SChao Yu }
1149a28ef1f5SChao Yu
__init_extent_tree_info(struct extent_tree_info * eti)1150e7547dacSJaegeuk Kim static void __init_extent_tree_info(struct extent_tree_info *eti)
1151a28ef1f5SChao Yu {
1152e7547dacSJaegeuk Kim INIT_RADIX_TREE(&eti->extent_tree_root, GFP_NOIO);
1153e7547dacSJaegeuk Kim mutex_init(&eti->extent_tree_lock);
1154e7547dacSJaegeuk Kim INIT_LIST_HEAD(&eti->extent_list);
1155e7547dacSJaegeuk Kim spin_lock_init(&eti->extent_lock);
1156e7547dacSJaegeuk Kim atomic_set(&eti->total_ext_tree, 0);
1157e7547dacSJaegeuk Kim INIT_LIST_HEAD(&eti->zombie_list);
1158e7547dacSJaegeuk Kim atomic_set(&eti->total_zombie_tree, 0);
1159e7547dacSJaegeuk Kim atomic_set(&eti->total_ext_node, 0);
1160a28ef1f5SChao Yu }
1161a28ef1f5SChao Yu
f2fs_init_extent_cache_info(struct f2fs_sb_info * sbi)11624d57b86dSChao Yu void f2fs_init_extent_cache_info(struct f2fs_sb_info *sbi)
1163a28ef1f5SChao Yu {
1164e7547dacSJaegeuk Kim __init_extent_tree_info(&sbi->extent_tree[EX_READ]);
116571644dffSJaegeuk Kim __init_extent_tree_info(&sbi->extent_tree[EX_BLOCK_AGE]);
116671644dffSJaegeuk Kim
116771644dffSJaegeuk Kim /* initialize for block age extents */
116871644dffSJaegeuk Kim atomic64_set(&sbi->allocated_data_blocks, 0);
116971644dffSJaegeuk Kim sbi->hot_data_age_threshold = DEF_HOT_DATA_AGE_THRESHOLD;
117071644dffSJaegeuk Kim sbi->warm_data_age_threshold = DEF_WARM_DATA_AGE_THRESHOLD;
1171d23be468Sqixiaoyu1 sbi->last_age_weight = LAST_AGE_WEIGHT;
1172a28ef1f5SChao Yu }
1173a28ef1f5SChao Yu
f2fs_create_extent_cache(void)11744d57b86dSChao Yu int __init f2fs_create_extent_cache(void)
1175a28ef1f5SChao Yu {
1176a28ef1f5SChao Yu extent_tree_slab = f2fs_kmem_cache_create("f2fs_extent_tree",
1177a28ef1f5SChao Yu sizeof(struct extent_tree));
1178a28ef1f5SChao Yu if (!extent_tree_slab)
1179a28ef1f5SChao Yu return -ENOMEM;
1180a28ef1f5SChao Yu extent_node_slab = f2fs_kmem_cache_create("f2fs_extent_node",
1181a28ef1f5SChao Yu sizeof(struct extent_node));
1182a28ef1f5SChao Yu if (!extent_node_slab) {
1183a28ef1f5SChao Yu kmem_cache_destroy(extent_tree_slab);
1184a28ef1f5SChao Yu return -ENOMEM;
1185a28ef1f5SChao Yu }
1186a28ef1f5SChao Yu return 0;
1187a28ef1f5SChao Yu }
1188a28ef1f5SChao Yu
f2fs_destroy_extent_cache(void)11894d57b86dSChao Yu void f2fs_destroy_extent_cache(void)
1190a28ef1f5SChao Yu {
1191a28ef1f5SChao Yu kmem_cache_destroy(extent_node_slab);
1192a28ef1f5SChao Yu kmem_cache_destroy(extent_tree_slab);
1193a28ef1f5SChao Yu }
1194