1*7c1a000dSChao 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> 9a28ef1f5SChao Yu */ 10a28ef1f5SChao Yu 11a28ef1f5SChao Yu #include <linux/fs.h> 12a28ef1f5SChao Yu #include <linux/f2fs_fs.h> 13a28ef1f5SChao Yu 14a28ef1f5SChao Yu #include "f2fs.h" 15a28ef1f5SChao Yu #include "node.h" 16a28ef1f5SChao Yu #include <trace/events/f2fs.h> 17a28ef1f5SChao Yu 1854c2258cSChao Yu static struct rb_entry *__lookup_rb_tree_fast(struct rb_entry *cached_re, 1954c2258cSChao Yu unsigned int ofs) 2054c2258cSChao Yu { 2154c2258cSChao Yu if (cached_re) { 2254c2258cSChao Yu if (cached_re->ofs <= ofs && 2354c2258cSChao Yu cached_re->ofs + cached_re->len > ofs) { 2454c2258cSChao Yu return cached_re; 2554c2258cSChao Yu } 2654c2258cSChao Yu } 2754c2258cSChao Yu return NULL; 2854c2258cSChao Yu } 2954c2258cSChao Yu 3054c2258cSChao Yu static struct rb_entry *__lookup_rb_tree_slow(struct rb_root *root, 3154c2258cSChao Yu unsigned int ofs) 3254c2258cSChao Yu { 3354c2258cSChao Yu struct rb_node *node = root->rb_node; 3454c2258cSChao Yu struct rb_entry *re; 3554c2258cSChao Yu 3654c2258cSChao Yu while (node) { 3754c2258cSChao Yu re = rb_entry(node, struct rb_entry, rb_node); 3854c2258cSChao Yu 3954c2258cSChao Yu if (ofs < re->ofs) 4054c2258cSChao Yu node = node->rb_left; 4154c2258cSChao Yu else if (ofs >= re->ofs + re->len) 4254c2258cSChao Yu node = node->rb_right; 4354c2258cSChao Yu else 4454c2258cSChao Yu return re; 4554c2258cSChao Yu } 4654c2258cSChao Yu return NULL; 4754c2258cSChao Yu } 4854c2258cSChao Yu 494d57b86dSChao Yu struct rb_entry *f2fs_lookup_rb_tree(struct rb_root *root, 5054c2258cSChao Yu struct rb_entry *cached_re, unsigned int ofs) 5154c2258cSChao Yu { 5254c2258cSChao Yu struct rb_entry *re; 5354c2258cSChao Yu 5454c2258cSChao Yu re = __lookup_rb_tree_fast(cached_re, ofs); 5554c2258cSChao Yu if (!re) 5654c2258cSChao Yu return __lookup_rb_tree_slow(root, ofs); 5754c2258cSChao Yu 5854c2258cSChao Yu return re; 5954c2258cSChao Yu } 6054c2258cSChao Yu 614d57b86dSChao Yu struct rb_node **f2fs_lookup_rb_tree_for_insert(struct f2fs_sb_info *sbi, 6254c2258cSChao Yu struct rb_root *root, struct rb_node **parent, 6354c2258cSChao Yu unsigned int ofs) 6454c2258cSChao Yu { 6554c2258cSChao Yu struct rb_node **p = &root->rb_node; 6654c2258cSChao Yu struct rb_entry *re; 6754c2258cSChao Yu 6854c2258cSChao Yu while (*p) { 6954c2258cSChao Yu *parent = *p; 7054c2258cSChao Yu re = rb_entry(*parent, struct rb_entry, rb_node); 7154c2258cSChao Yu 7254c2258cSChao Yu if (ofs < re->ofs) 7354c2258cSChao Yu p = &(*p)->rb_left; 7454c2258cSChao Yu else if (ofs >= re->ofs + re->len) 7554c2258cSChao Yu p = &(*p)->rb_right; 7654c2258cSChao Yu else 7754c2258cSChao Yu f2fs_bug_on(sbi, 1); 7854c2258cSChao Yu } 7954c2258cSChao Yu 8054c2258cSChao Yu return p; 8154c2258cSChao Yu } 8254c2258cSChao Yu 8354c2258cSChao Yu /* 8454c2258cSChao Yu * lookup rb entry in position of @ofs in rb-tree, 8554c2258cSChao Yu * if hit, return the entry, otherwise, return NULL 8654c2258cSChao Yu * @prev_ex: extent before ofs 8754c2258cSChao Yu * @next_ex: extent after ofs 8854c2258cSChao Yu * @insert_p: insert point for new extent at ofs 8954c2258cSChao Yu * in order to simpfy the insertion after. 9054c2258cSChao Yu * tree must stay unchanged between lookup and insertion. 9154c2258cSChao Yu */ 924d57b86dSChao Yu struct rb_entry *f2fs_lookup_rb_tree_ret(struct rb_root *root, 9354c2258cSChao Yu struct rb_entry *cached_re, 9454c2258cSChao Yu unsigned int ofs, 9554c2258cSChao Yu struct rb_entry **prev_entry, 9654c2258cSChao Yu struct rb_entry **next_entry, 9754c2258cSChao Yu struct rb_node ***insert_p, 98004b6862SChao Yu struct rb_node **insert_parent, 99004b6862SChao Yu bool force) 10054c2258cSChao Yu { 10154c2258cSChao Yu struct rb_node **pnode = &root->rb_node; 10254c2258cSChao Yu struct rb_node *parent = NULL, *tmp_node; 10354c2258cSChao Yu struct rb_entry *re = cached_re; 10454c2258cSChao Yu 10554c2258cSChao Yu *insert_p = NULL; 10654c2258cSChao Yu *insert_parent = NULL; 10754c2258cSChao Yu *prev_entry = NULL; 10854c2258cSChao Yu *next_entry = NULL; 10954c2258cSChao Yu 11054c2258cSChao Yu if (RB_EMPTY_ROOT(root)) 11154c2258cSChao Yu return NULL; 11254c2258cSChao Yu 11354c2258cSChao Yu if (re) { 11454c2258cSChao Yu if (re->ofs <= ofs && re->ofs + re->len > ofs) 11554c2258cSChao Yu goto lookup_neighbors; 11654c2258cSChao Yu } 11754c2258cSChao Yu 11854c2258cSChao Yu while (*pnode) { 11954c2258cSChao Yu parent = *pnode; 12054c2258cSChao Yu re = rb_entry(*pnode, struct rb_entry, rb_node); 12154c2258cSChao Yu 12254c2258cSChao Yu if (ofs < re->ofs) 12354c2258cSChao Yu pnode = &(*pnode)->rb_left; 12454c2258cSChao Yu else if (ofs >= re->ofs + re->len) 12554c2258cSChao Yu pnode = &(*pnode)->rb_right; 12654c2258cSChao Yu else 12754c2258cSChao Yu goto lookup_neighbors; 12854c2258cSChao Yu } 12954c2258cSChao Yu 13054c2258cSChao Yu *insert_p = pnode; 13154c2258cSChao Yu *insert_parent = parent; 13254c2258cSChao Yu 13354c2258cSChao Yu re = rb_entry(parent, struct rb_entry, rb_node); 13454c2258cSChao Yu tmp_node = parent; 13554c2258cSChao Yu if (parent && ofs > re->ofs) 13654c2258cSChao Yu tmp_node = rb_next(parent); 13754c2258cSChao Yu *next_entry = rb_entry_safe(tmp_node, struct rb_entry, rb_node); 13854c2258cSChao Yu 13954c2258cSChao Yu tmp_node = parent; 14054c2258cSChao Yu if (parent && ofs < re->ofs) 14154c2258cSChao Yu tmp_node = rb_prev(parent); 14254c2258cSChao Yu *prev_entry = rb_entry_safe(tmp_node, struct rb_entry, rb_node); 14354c2258cSChao Yu return NULL; 14454c2258cSChao Yu 14554c2258cSChao Yu lookup_neighbors: 146004b6862SChao Yu if (ofs == re->ofs || force) { 14754c2258cSChao Yu /* lookup prev node for merging backward later */ 14854c2258cSChao Yu tmp_node = rb_prev(&re->rb_node); 14954c2258cSChao Yu *prev_entry = rb_entry_safe(tmp_node, struct rb_entry, rb_node); 15054c2258cSChao Yu } 151004b6862SChao Yu if (ofs == re->ofs + re->len - 1 || force) { 15254c2258cSChao Yu /* lookup next node for merging frontward later */ 15354c2258cSChao Yu tmp_node = rb_next(&re->rb_node); 15454c2258cSChao Yu *next_entry = rb_entry_safe(tmp_node, struct rb_entry, rb_node); 15554c2258cSChao Yu } 15654c2258cSChao Yu return re; 15754c2258cSChao Yu } 15854c2258cSChao Yu 1594d57b86dSChao Yu bool f2fs_check_rb_tree_consistence(struct f2fs_sb_info *sbi, 160df0f6b44SChao Yu struct rb_root *root) 161df0f6b44SChao Yu { 162df0f6b44SChao Yu #ifdef CONFIG_F2FS_CHECK_FS 163df0f6b44SChao Yu struct rb_node *cur = rb_first(root), *next; 164df0f6b44SChao Yu struct rb_entry *cur_re, *next_re; 165df0f6b44SChao Yu 166df0f6b44SChao Yu if (!cur) 167df0f6b44SChao Yu return true; 168df0f6b44SChao Yu 169df0f6b44SChao Yu while (cur) { 170df0f6b44SChao Yu next = rb_next(cur); 171df0f6b44SChao Yu if (!next) 172df0f6b44SChao Yu return true; 173df0f6b44SChao Yu 174df0f6b44SChao Yu cur_re = rb_entry(cur, struct rb_entry, rb_node); 175df0f6b44SChao Yu next_re = rb_entry(next, struct rb_entry, rb_node); 176df0f6b44SChao Yu 177df0f6b44SChao Yu if (cur_re->ofs + cur_re->len > next_re->ofs) { 178df0f6b44SChao Yu f2fs_msg(sbi->sb, KERN_INFO, "inconsistent rbtree, " 179df0f6b44SChao Yu "cur(%u, %u) next(%u, %u)", 180df0f6b44SChao Yu cur_re->ofs, cur_re->len, 181df0f6b44SChao Yu next_re->ofs, next_re->len); 182df0f6b44SChao Yu return false; 183df0f6b44SChao Yu } 184df0f6b44SChao Yu 185df0f6b44SChao Yu cur = next; 186df0f6b44SChao Yu } 187df0f6b44SChao Yu #endif 188df0f6b44SChao Yu return true; 189df0f6b44SChao Yu } 190df0f6b44SChao Yu 191a28ef1f5SChao Yu static struct kmem_cache *extent_tree_slab; 192a28ef1f5SChao Yu static struct kmem_cache *extent_node_slab; 193a28ef1f5SChao Yu 194a28ef1f5SChao Yu static struct extent_node *__attach_extent_node(struct f2fs_sb_info *sbi, 195a28ef1f5SChao Yu struct extent_tree *et, struct extent_info *ei, 196a28ef1f5SChao Yu struct rb_node *parent, struct rb_node **p) 197a28ef1f5SChao Yu { 198a28ef1f5SChao Yu struct extent_node *en; 199a28ef1f5SChao Yu 200a28ef1f5SChao Yu en = kmem_cache_alloc(extent_node_slab, GFP_ATOMIC); 201a28ef1f5SChao Yu if (!en) 202a28ef1f5SChao Yu return NULL; 203a28ef1f5SChao Yu 204a28ef1f5SChao Yu en->ei = *ei; 205a28ef1f5SChao Yu INIT_LIST_HEAD(&en->list); 206201ef5e0SHou Pengyang en->et = et; 207a28ef1f5SChao Yu 208a28ef1f5SChao Yu rb_link_node(&en->rb_node, parent, p); 209a28ef1f5SChao Yu rb_insert_color(&en->rb_node, &et->root); 21068e35385SChao Yu atomic_inc(&et->node_cnt); 211a28ef1f5SChao Yu atomic_inc(&sbi->total_ext_node); 212a28ef1f5SChao Yu return en; 213a28ef1f5SChao Yu } 214a28ef1f5SChao Yu 215a28ef1f5SChao Yu static void __detach_extent_node(struct f2fs_sb_info *sbi, 216a28ef1f5SChao Yu struct extent_tree *et, struct extent_node *en) 217a28ef1f5SChao Yu { 218a28ef1f5SChao Yu rb_erase(&en->rb_node, &et->root); 21968e35385SChao Yu atomic_dec(&et->node_cnt); 220a28ef1f5SChao Yu atomic_dec(&sbi->total_ext_node); 221a28ef1f5SChao Yu 222a28ef1f5SChao Yu if (et->cached_en == en) 223a28ef1f5SChao Yu et->cached_en = NULL; 224a03f01f2SHou Pengyang kmem_cache_free(extent_node_slab, en); 225a03f01f2SHou Pengyang } 226a03f01f2SHou Pengyang 227a03f01f2SHou Pengyang /* 228a03f01f2SHou Pengyang * Flow to release an extent_node: 229a03f01f2SHou Pengyang * 1. list_del_init 230a03f01f2SHou Pengyang * 2. __detach_extent_node 231a03f01f2SHou Pengyang * 3. kmem_cache_free. 232a03f01f2SHou Pengyang */ 233a03f01f2SHou Pengyang static void __release_extent_node(struct f2fs_sb_info *sbi, 234a03f01f2SHou Pengyang struct extent_tree *et, struct extent_node *en) 235a03f01f2SHou Pengyang { 236a03f01f2SHou Pengyang spin_lock(&sbi->extent_lock); 237201ef5e0SHou Pengyang f2fs_bug_on(sbi, list_empty(&en->list)); 238a03f01f2SHou Pengyang list_del_init(&en->list); 239a03f01f2SHou Pengyang spin_unlock(&sbi->extent_lock); 240a03f01f2SHou Pengyang 241a03f01f2SHou Pengyang __detach_extent_node(sbi, et, en); 242a28ef1f5SChao Yu } 243a28ef1f5SChao Yu 244a28ef1f5SChao Yu static struct extent_tree *__grab_extent_tree(struct inode *inode) 245a28ef1f5SChao Yu { 246a28ef1f5SChao Yu struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 247a28ef1f5SChao Yu struct extent_tree *et; 248a28ef1f5SChao Yu nid_t ino = inode->i_ino; 249a28ef1f5SChao Yu 2505e8256acSYunlei He mutex_lock(&sbi->extent_tree_lock); 251a28ef1f5SChao Yu et = radix_tree_lookup(&sbi->extent_tree_root, ino); 252a28ef1f5SChao Yu if (!et) { 253a28ef1f5SChao Yu et = f2fs_kmem_cache_alloc(extent_tree_slab, GFP_NOFS); 254a28ef1f5SChao Yu f2fs_radix_tree_insert(&sbi->extent_tree_root, ino, et); 255a28ef1f5SChao Yu memset(et, 0, sizeof(struct extent_tree)); 256a28ef1f5SChao Yu et->ino = ino; 257a28ef1f5SChao Yu et->root = RB_ROOT; 258a28ef1f5SChao Yu et->cached_en = NULL; 259a28ef1f5SChao Yu rwlock_init(&et->lock); 260137d09f0SJaegeuk Kim INIT_LIST_HEAD(&et->list); 26168e35385SChao Yu atomic_set(&et->node_cnt, 0); 2627441ccefSJaegeuk Kim atomic_inc(&sbi->total_ext_tree); 26374fd8d99SJaegeuk Kim } else { 26474fd8d99SJaegeuk Kim atomic_dec(&sbi->total_zombie_tree); 265137d09f0SJaegeuk Kim list_del_init(&et->list); 266a28ef1f5SChao Yu } 2675e8256acSYunlei He mutex_unlock(&sbi->extent_tree_lock); 268a28ef1f5SChao Yu 269a28ef1f5SChao Yu /* never died until evict_inode */ 270a28ef1f5SChao Yu F2FS_I(inode)->extent_tree = et; 271a28ef1f5SChao Yu 272a28ef1f5SChao Yu return et; 273a28ef1f5SChao Yu } 274a28ef1f5SChao Yu 275a6f78345SChao Yu static struct extent_node *__init_extent_tree(struct f2fs_sb_info *sbi, 276a6f78345SChao Yu struct extent_tree *et, struct extent_info *ei) 277a28ef1f5SChao Yu { 278a28ef1f5SChao Yu struct rb_node **p = &et->root.rb_node; 279a28ef1f5SChao Yu struct extent_node *en; 280a28ef1f5SChao Yu 281a6f78345SChao Yu en = __attach_extent_node(sbi, et, ei, NULL, p); 282a28ef1f5SChao Yu if (!en) 283a28ef1f5SChao Yu return NULL; 284a6f78345SChao Yu 285a28ef1f5SChao Yu et->largest = en->ei; 286a28ef1f5SChao Yu et->cached_en = en; 287a28ef1f5SChao Yu return en; 288a28ef1f5SChao Yu } 289a28ef1f5SChao Yu 290a28ef1f5SChao Yu static unsigned int __free_extent_tree(struct f2fs_sb_info *sbi, 291201ef5e0SHou Pengyang struct extent_tree *et) 292a28ef1f5SChao Yu { 293a28ef1f5SChao Yu struct rb_node *node, *next; 294a28ef1f5SChao Yu struct extent_node *en; 29568e35385SChao Yu unsigned int count = atomic_read(&et->node_cnt); 296a28ef1f5SChao Yu 297a28ef1f5SChao Yu node = rb_first(&et->root); 298a28ef1f5SChao Yu while (node) { 299a28ef1f5SChao Yu next = rb_next(node); 300a28ef1f5SChao Yu en = rb_entry(node, struct extent_node, rb_node); 301a03f01f2SHou Pengyang __release_extent_node(sbi, et, en); 302a28ef1f5SChao Yu node = next; 303a28ef1f5SChao Yu } 304a28ef1f5SChao Yu 30568e35385SChao Yu return count - atomic_read(&et->node_cnt); 306a28ef1f5SChao Yu } 307a28ef1f5SChao Yu 308b430f726SZhikang Zhang static void __drop_largest_extent(struct extent_tree *et, 30941a099deSFan Li pgoff_t fofs, unsigned int len) 310a28ef1f5SChao Yu { 311b430f726SZhikang Zhang if (fofs < et->largest.fofs + et->largest.len && 312b430f726SZhikang Zhang fofs + len > et->largest.fofs) { 313b430f726SZhikang Zhang et->largest.len = 0; 314b430f726SZhikang Zhang et->largest_updated = true; 315205b9822SJaegeuk Kim } 316a28ef1f5SChao Yu } 317a28ef1f5SChao Yu 318ed3d1256SJaegeuk Kim /* return true, if inode page is changed */ 319dad48e73SYunlei He static bool __f2fs_init_extent_tree(struct inode *inode, struct f2fs_extent *i_ext) 320a28ef1f5SChao Yu { 321a28ef1f5SChao Yu struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 322a28ef1f5SChao Yu struct extent_tree *et; 323a28ef1f5SChao Yu struct extent_node *en; 324a28ef1f5SChao Yu struct extent_info ei; 325a28ef1f5SChao Yu 326ed3d1256SJaegeuk Kim if (!f2fs_may_extent_tree(inode)) { 327ed3d1256SJaegeuk Kim /* drop largest extent */ 328ed3d1256SJaegeuk Kim if (i_ext && i_ext->len) { 329ed3d1256SJaegeuk Kim i_ext->len = 0; 330ed3d1256SJaegeuk Kim return true; 331ed3d1256SJaegeuk Kim } 332ed3d1256SJaegeuk Kim return false; 333ed3d1256SJaegeuk Kim } 334a28ef1f5SChao Yu 335a28ef1f5SChao Yu et = __grab_extent_tree(inode); 336a28ef1f5SChao Yu 337ed3d1256SJaegeuk Kim if (!i_ext || !i_ext->len) 338ed3d1256SJaegeuk Kim return false; 339a28ef1f5SChao Yu 340bd933d4fSChao Yu get_extent_info(&ei, i_ext); 341a28ef1f5SChao Yu 342a28ef1f5SChao Yu write_lock(&et->lock); 34368e35385SChao Yu if (atomic_read(&et->node_cnt)) 344a28ef1f5SChao Yu goto out; 345a28ef1f5SChao Yu 346a6f78345SChao Yu en = __init_extent_tree(sbi, et, &ei); 347a28ef1f5SChao Yu if (en) { 348a28ef1f5SChao Yu spin_lock(&sbi->extent_lock); 349a28ef1f5SChao Yu list_add_tail(&en->list, &sbi->extent_list); 350a28ef1f5SChao Yu spin_unlock(&sbi->extent_lock); 351a28ef1f5SChao Yu } 352a28ef1f5SChao Yu out: 353a28ef1f5SChao Yu write_unlock(&et->lock); 354ed3d1256SJaegeuk Kim return false; 355a28ef1f5SChao Yu } 356a28ef1f5SChao Yu 357dad48e73SYunlei He bool f2fs_init_extent_tree(struct inode *inode, struct f2fs_extent *i_ext) 358dad48e73SYunlei He { 359dad48e73SYunlei He bool ret = __f2fs_init_extent_tree(inode, i_ext); 360dad48e73SYunlei He 361dad48e73SYunlei He if (!F2FS_I(inode)->extent_tree) 362dad48e73SYunlei He set_inode_flag(inode, FI_NO_EXTENT); 363dad48e73SYunlei He 364dad48e73SYunlei He return ret; 365dad48e73SYunlei He } 366dad48e73SYunlei He 367a28ef1f5SChao Yu static bool f2fs_lookup_extent_tree(struct inode *inode, pgoff_t pgofs, 368a28ef1f5SChao Yu struct extent_info *ei) 369a28ef1f5SChao Yu { 370a28ef1f5SChao Yu struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 371a28ef1f5SChao Yu struct extent_tree *et = F2FS_I(inode)->extent_tree; 372a28ef1f5SChao Yu struct extent_node *en; 373a28ef1f5SChao Yu bool ret = false; 374a28ef1f5SChao Yu 375a28ef1f5SChao Yu f2fs_bug_on(sbi, !et); 376a28ef1f5SChao Yu 377a28ef1f5SChao Yu trace_f2fs_lookup_extent_tree_start(inode, pgofs); 378a28ef1f5SChao Yu 379a28ef1f5SChao Yu read_lock(&et->lock); 380a28ef1f5SChao Yu 381a28ef1f5SChao Yu if (et->largest.fofs <= pgofs && 382a28ef1f5SChao Yu et->largest.fofs + et->largest.len > pgofs) { 383a28ef1f5SChao Yu *ei = et->largest; 384a28ef1f5SChao Yu ret = true; 38591c481ffSChao Yu stat_inc_largest_node_hit(sbi); 386a28ef1f5SChao Yu goto out; 387a28ef1f5SChao Yu } 388a28ef1f5SChao Yu 3894d57b86dSChao Yu en = (struct extent_node *)f2fs_lookup_rb_tree(&et->root, 39054c2258cSChao Yu (struct rb_entry *)et->cached_en, pgofs); 39154c2258cSChao Yu if (!en) 39254c2258cSChao Yu goto out; 39354c2258cSChao Yu 39454c2258cSChao Yu if (en == et->cached_en) 39554c2258cSChao Yu stat_inc_cached_node_hit(sbi); 39654c2258cSChao Yu else 39754c2258cSChao Yu stat_inc_rbtree_node_hit(sbi); 39854c2258cSChao Yu 399a28ef1f5SChao Yu *ei = en->ei; 400a28ef1f5SChao Yu spin_lock(&sbi->extent_lock); 40142926744SJaegeuk Kim if (!list_empty(&en->list)) { 402a28ef1f5SChao Yu list_move_tail(&en->list, &sbi->extent_list); 403a28ef1f5SChao Yu et->cached_en = en; 40442926744SJaegeuk Kim } 405a28ef1f5SChao Yu spin_unlock(&sbi->extent_lock); 406a28ef1f5SChao Yu ret = true; 407a28ef1f5SChao Yu out: 408727edac5SChao Yu stat_inc_total_hit(sbi); 409a28ef1f5SChao Yu read_unlock(&et->lock); 410a28ef1f5SChao Yu 411a28ef1f5SChao Yu trace_f2fs_lookup_extent_tree_end(inode, pgofs, ei); 412a28ef1f5SChao Yu return ret; 413a28ef1f5SChao Yu } 414a28ef1f5SChao Yu 415b430f726SZhikang Zhang static struct extent_node *__try_merge_extent_node(struct f2fs_sb_info *sbi, 4160f825ee6SFan Li struct extent_tree *et, struct extent_info *ei, 4170f825ee6SFan Li struct extent_node *prev_ex, 418ef05e221SChao Yu struct extent_node *next_ex) 4190f825ee6SFan Li { 4200f825ee6SFan Li struct extent_node *en = NULL; 4210f825ee6SFan Li 4220f825ee6SFan Li if (prev_ex && __is_back_mergeable(ei, &prev_ex->ei)) { 4230f825ee6SFan Li prev_ex->ei.len += ei->len; 4240f825ee6SFan Li ei = &prev_ex->ei; 4250f825ee6SFan Li en = prev_ex; 4260f825ee6SFan Li } 427ef05e221SChao Yu 4280f825ee6SFan Li if (next_ex && __is_front_mergeable(ei, &next_ex->ei)) { 4290f825ee6SFan Li next_ex->ei.fofs = ei->fofs; 4300f825ee6SFan Li next_ex->ei.blk = ei->blk; 4310f825ee6SFan Li next_ex->ei.len += ei->len; 4327855eba4SYunlei He if (en) 4337855eba4SYunlei He __release_extent_node(sbi, et, prev_ex); 4347855eba4SYunlei He 4350f825ee6SFan Li en = next_ex; 4360f825ee6SFan Li } 437ef05e221SChao Yu 43843a2fa18SJaegeuk Kim if (!en) 43943a2fa18SJaegeuk Kim return NULL; 44043a2fa18SJaegeuk Kim 441b430f726SZhikang Zhang __try_update_largest_extent(et, en); 44243a2fa18SJaegeuk Kim 44343a2fa18SJaegeuk Kim spin_lock(&sbi->extent_lock); 44442926744SJaegeuk Kim if (!list_empty(&en->list)) { 44543a2fa18SJaegeuk Kim list_move_tail(&en->list, &sbi->extent_list); 44642926744SJaegeuk Kim et->cached_en = en; 44742926744SJaegeuk Kim } 44843a2fa18SJaegeuk Kim spin_unlock(&sbi->extent_lock); 449ef05e221SChao Yu return en; 450ef05e221SChao Yu } 451ef05e221SChao Yu 452b430f726SZhikang Zhang static struct extent_node *__insert_extent_tree(struct f2fs_sb_info *sbi, 453ef05e221SChao Yu struct extent_tree *et, struct extent_info *ei, 454ef05e221SChao Yu struct rb_node **insert_p, 455ef05e221SChao Yu struct rb_node *insert_parent) 456ef05e221SChao Yu { 4578fe326cbSColin Ian King struct rb_node **p; 458ef05e221SChao Yu struct rb_node *parent = NULL; 459ef05e221SChao Yu struct extent_node *en = NULL; 4600f825ee6SFan Li 4610f825ee6SFan Li if (insert_p && insert_parent) { 4620f825ee6SFan Li parent = insert_parent; 4630f825ee6SFan Li p = insert_p; 4640f825ee6SFan Li goto do_insert; 4650f825ee6SFan Li } 4660f825ee6SFan Li 4674d57b86dSChao Yu p = f2fs_lookup_rb_tree_for_insert(sbi, &et->root, &parent, ei->fofs); 4680f825ee6SFan Li do_insert: 4690f825ee6SFan Li en = __attach_extent_node(sbi, et, ei, parent, p); 4700f825ee6SFan Li if (!en) 4710f825ee6SFan Li return NULL; 472ef05e221SChao Yu 473b430f726SZhikang Zhang __try_update_largest_extent(et, en); 47443a2fa18SJaegeuk Kim 47543a2fa18SJaegeuk Kim /* update in global extent list */ 47643a2fa18SJaegeuk Kim spin_lock(&sbi->extent_lock); 47743a2fa18SJaegeuk Kim list_add_tail(&en->list, &sbi->extent_list); 47842926744SJaegeuk Kim et->cached_en = en; 47943a2fa18SJaegeuk Kim spin_unlock(&sbi->extent_lock); 4800f825ee6SFan Li return en; 4810f825ee6SFan Li } 4820f825ee6SFan Li 483317e1300SChao Yu static void f2fs_update_extent_tree_range(struct inode *inode, 48419b2c30dSChao Yu pgoff_t fofs, block_t blkaddr, unsigned int len) 485a28ef1f5SChao Yu { 486a28ef1f5SChao Yu struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 487a28ef1f5SChao Yu struct extent_tree *et = F2FS_I(inode)->extent_tree; 4884d1fa815SFan Li struct extent_node *en = NULL, *en1 = NULL; 48919b2c30dSChao Yu struct extent_node *prev_en = NULL, *next_en = NULL; 490a28ef1f5SChao Yu struct extent_info ei, dei, prev; 4910f825ee6SFan Li struct rb_node **insert_p = NULL, *insert_parent = NULL; 49219b2c30dSChao Yu unsigned int end = fofs + len; 49319b2c30dSChao Yu unsigned int pos = (unsigned int)fofs; 494b430f726SZhikang Zhang bool updated = false; 495a28ef1f5SChao Yu 496a28ef1f5SChao Yu if (!et) 497317e1300SChao Yu return; 498a28ef1f5SChao Yu 499744288c7SChao Yu trace_f2fs_update_extent_tree_range(inode, fofs, blkaddr, len); 500744288c7SChao Yu 501a28ef1f5SChao Yu write_lock(&et->lock); 502a28ef1f5SChao Yu 50391942321SJaegeuk Kim if (is_inode_flag_set(inode, FI_NO_EXTENT)) { 504a28ef1f5SChao Yu write_unlock(&et->lock); 505317e1300SChao Yu return; 506a28ef1f5SChao Yu } 507a28ef1f5SChao Yu 508a28ef1f5SChao Yu prev = et->largest; 509a28ef1f5SChao Yu dei.len = 0; 510a28ef1f5SChao Yu 5114d1fa815SFan Li /* 5124d1fa815SFan Li * drop largest extent before lookup, in case it's already 5134d1fa815SFan Li * been shrunk from extent tree 5144d1fa815SFan Li */ 515b430f726SZhikang Zhang __drop_largest_extent(et, fofs, len); 516a28ef1f5SChao Yu 51719b2c30dSChao Yu /* 1. lookup first extent node in range [fofs, fofs + len - 1] */ 5184d57b86dSChao Yu en = (struct extent_node *)f2fs_lookup_rb_tree_ret(&et->root, 51954c2258cSChao Yu (struct rb_entry *)et->cached_en, fofs, 52054c2258cSChao Yu (struct rb_entry **)&prev_en, 52154c2258cSChao Yu (struct rb_entry **)&next_en, 522004b6862SChao Yu &insert_p, &insert_parent, false); 5234d1fa815SFan Li if (!en) 52419b2c30dSChao Yu en = next_en; 52519b2c30dSChao Yu 52619b2c30dSChao Yu /* 2. invlidate all extent nodes in range [fofs, fofs + len - 1] */ 5274d1fa815SFan Li while (en && en->ei.fofs < end) { 5284d1fa815SFan Li unsigned int org_end; 5294d1fa815SFan Li int parts = 0; /* # of parts current extent split into */ 53019b2c30dSChao Yu 5314d1fa815SFan Li next_en = en1 = NULL; 532a28ef1f5SChao Yu 533a28ef1f5SChao Yu dei = en->ei; 5344d1fa815SFan Li org_end = dei.fofs + dei.len; 5354d1fa815SFan Li f2fs_bug_on(sbi, pos >= org_end); 53619b2c30dSChao Yu 5374d1fa815SFan Li if (pos > dei.fofs && pos - dei.fofs >= F2FS_MIN_EXTENT_LEN) { 5384d1fa815SFan Li en->ei.len = pos - en->ei.fofs; 5394d1fa815SFan Li prev_en = en; 5404d1fa815SFan Li parts = 1; 54119b2c30dSChao Yu } 54219b2c30dSChao Yu 5434d1fa815SFan Li if (end < org_end && org_end - end >= F2FS_MIN_EXTENT_LEN) { 5444d1fa815SFan Li if (parts) { 5454d1fa815SFan Li set_extent_info(&ei, end, 5464d1fa815SFan Li end - dei.fofs + dei.blk, 5474d1fa815SFan Li org_end - end); 548b430f726SZhikang Zhang en1 = __insert_extent_tree(sbi, et, &ei, 5494d1fa815SFan Li NULL, NULL); 5504d1fa815SFan Li next_en = en1; 5514d1fa815SFan Li } else { 55219b2c30dSChao Yu en->ei.fofs = end; 55319b2c30dSChao Yu en->ei.blk += end - dei.fofs; 55419b2c30dSChao Yu en->ei.len -= end - dei.fofs; 5554d1fa815SFan Li next_en = en; 5564d1fa815SFan Li } 5574d1fa815SFan Li parts++; 55819b2c30dSChao Yu } 55919b2c30dSChao Yu 5604d1fa815SFan Li if (!next_en) { 5614d1fa815SFan Li struct rb_node *node = rb_next(&en->rb_node); 5624d1fa815SFan Li 563ed0b5620SGeliang Tang next_en = rb_entry_safe(node, struct extent_node, 564ed0b5620SGeliang Tang rb_node); 5654d1fa815SFan Li } 5664d1fa815SFan Li 5674abd3f5aSChao Yu if (parts) 568b430f726SZhikang Zhang __try_update_largest_extent(et, en); 5694abd3f5aSChao Yu else 570a03f01f2SHou Pengyang __release_extent_node(sbi, et, en); 57119b2c30dSChao Yu 57219b2c30dSChao Yu /* 5734d1fa815SFan Li * if original extent is split into zero or two parts, extent 5744d1fa815SFan Li * tree has been altered by deletion or insertion, therefore 5754d1fa815SFan Li * invalidate pointers regard to tree. 57619b2c30dSChao Yu */ 5774d1fa815SFan Li if (parts != 1) { 57819b2c30dSChao Yu insert_p = NULL; 57919b2c30dSChao Yu insert_parent = NULL; 58019b2c30dSChao Yu } 5814d1fa815SFan Li en = next_en; 58219b2c30dSChao Yu } 583a28ef1f5SChao Yu 584a28ef1f5SChao Yu /* 3. update extent in extent cache */ 585a28ef1f5SChao Yu if (blkaddr) { 58619b2c30dSChao Yu 58719b2c30dSChao Yu set_extent_info(&ei, fofs, blkaddr, len); 588b430f726SZhikang Zhang if (!__try_merge_extent_node(sbi, et, &ei, prev_en, next_en)) 589b430f726SZhikang Zhang __insert_extent_tree(sbi, et, &ei, 590ef05e221SChao Yu insert_p, insert_parent); 591a28ef1f5SChao Yu 592a28ef1f5SChao Yu /* give up extent_cache, if split and small updates happen */ 593a28ef1f5SChao Yu if (dei.len >= 1 && 594a28ef1f5SChao Yu prev.len < F2FS_MIN_EXTENT_LEN && 595a28ef1f5SChao Yu et->largest.len < F2FS_MIN_EXTENT_LEN) { 596b430f726SZhikang Zhang et->largest.len = 0; 597b430f726SZhikang Zhang et->largest_updated = true; 59891942321SJaegeuk Kim set_inode_flag(inode, FI_NO_EXTENT); 599a28ef1f5SChao Yu } 60019b2c30dSChao Yu } 601a28ef1f5SChao Yu 60291942321SJaegeuk Kim if (is_inode_flag_set(inode, FI_NO_EXTENT)) 603201ef5e0SHou Pengyang __free_extent_tree(sbi, et); 604a28ef1f5SChao Yu 605b430f726SZhikang Zhang if (et->largest_updated) { 606b430f726SZhikang Zhang et->largest_updated = false; 607b430f726SZhikang Zhang updated = true; 608b430f726SZhikang Zhang } 609b430f726SZhikang Zhang 610a28ef1f5SChao Yu write_unlock(&et->lock); 611b430f726SZhikang Zhang 612b430f726SZhikang Zhang if (updated) 613b430f726SZhikang Zhang f2fs_mark_inode_dirty_sync(inode, true); 614a28ef1f5SChao Yu } 615a28ef1f5SChao Yu 616a28ef1f5SChao Yu unsigned int f2fs_shrink_extent_tree(struct f2fs_sb_info *sbi, int nr_shrink) 617a28ef1f5SChao Yu { 618137d09f0SJaegeuk Kim struct extent_tree *et, *next; 619201ef5e0SHou Pengyang struct extent_node *en; 620a28ef1f5SChao Yu unsigned int node_cnt = 0, tree_cnt = 0; 621a28ef1f5SChao Yu int remained; 622a28ef1f5SChao Yu 623a28ef1f5SChao Yu if (!test_opt(sbi, EXTENT_CACHE)) 624a28ef1f5SChao Yu return 0; 625a28ef1f5SChao Yu 62674fd8d99SJaegeuk Kim if (!atomic_read(&sbi->total_zombie_tree)) 62774fd8d99SJaegeuk Kim goto free_node; 62874fd8d99SJaegeuk Kim 6295e8256acSYunlei He if (!mutex_trylock(&sbi->extent_tree_lock)) 630a28ef1f5SChao Yu goto out; 631a28ef1f5SChao Yu 632a28ef1f5SChao Yu /* 1. remove unreferenced extent tree */ 633137d09f0SJaegeuk Kim list_for_each_entry_safe(et, next, &sbi->zombie_list, list) { 6349b72a388SChao Yu if (atomic_read(&et->node_cnt)) { 635a28ef1f5SChao Yu write_lock(&et->lock); 636201ef5e0SHou Pengyang node_cnt += __free_extent_tree(sbi, et); 637a28ef1f5SChao Yu write_unlock(&et->lock); 6389b72a388SChao Yu } 639201ef5e0SHou Pengyang f2fs_bug_on(sbi, atomic_read(&et->node_cnt)); 640137d09f0SJaegeuk Kim list_del_init(&et->list); 641137d09f0SJaegeuk Kim radix_tree_delete(&sbi->extent_tree_root, et->ino); 642a28ef1f5SChao Yu kmem_cache_free(extent_tree_slab, et); 6437441ccefSJaegeuk Kim atomic_dec(&sbi->total_ext_tree); 64474fd8d99SJaegeuk Kim atomic_dec(&sbi->total_zombie_tree); 645a28ef1f5SChao Yu tree_cnt++; 646a28ef1f5SChao Yu 647a28ef1f5SChao Yu if (node_cnt + tree_cnt >= nr_shrink) 648a28ef1f5SChao Yu goto unlock_out; 6496fe2bc95SJaegeuk Kim cond_resched(); 650a28ef1f5SChao Yu } 6515e8256acSYunlei He mutex_unlock(&sbi->extent_tree_lock); 652a28ef1f5SChao Yu 65374fd8d99SJaegeuk Kim free_node: 654a28ef1f5SChao Yu /* 2. remove LRU extent entries */ 6555e8256acSYunlei He if (!mutex_trylock(&sbi->extent_tree_lock)) 656a28ef1f5SChao Yu goto out; 657a28ef1f5SChao Yu 658a28ef1f5SChao Yu remained = nr_shrink - (node_cnt + tree_cnt); 659a28ef1f5SChao Yu 660a28ef1f5SChao Yu spin_lock(&sbi->extent_lock); 661201ef5e0SHou Pengyang for (; remained > 0; remained--) { 662201ef5e0SHou Pengyang if (list_empty(&sbi->extent_list)) 663a28ef1f5SChao Yu break; 664201ef5e0SHou Pengyang en = list_first_entry(&sbi->extent_list, 665201ef5e0SHou Pengyang struct extent_node, list); 666201ef5e0SHou Pengyang et = en->et; 667201ef5e0SHou Pengyang if (!write_trylock(&et->lock)) { 668201ef5e0SHou Pengyang /* refresh this extent node's position in extent list */ 669201ef5e0SHou Pengyang list_move_tail(&en->list, &sbi->extent_list); 670201ef5e0SHou Pengyang continue; 671201ef5e0SHou Pengyang } 672201ef5e0SHou Pengyang 673a28ef1f5SChao Yu list_del_init(&en->list); 674201ef5e0SHou Pengyang spin_unlock(&sbi->extent_lock); 675201ef5e0SHou Pengyang 676201ef5e0SHou Pengyang __detach_extent_node(sbi, et, en); 677201ef5e0SHou Pengyang 678201ef5e0SHou Pengyang write_unlock(&et->lock); 679201ef5e0SHou Pengyang node_cnt++; 680201ef5e0SHou Pengyang spin_lock(&sbi->extent_lock); 681a28ef1f5SChao Yu } 682a28ef1f5SChao Yu spin_unlock(&sbi->extent_lock); 683a28ef1f5SChao Yu 684a28ef1f5SChao Yu unlock_out: 6855e8256acSYunlei He mutex_unlock(&sbi->extent_tree_lock); 686a28ef1f5SChao Yu out: 687a28ef1f5SChao Yu trace_f2fs_shrink_extent_tree(sbi, node_cnt, tree_cnt); 688a28ef1f5SChao Yu 689a28ef1f5SChao Yu return node_cnt + tree_cnt; 690a28ef1f5SChao Yu } 691a28ef1f5SChao Yu 692a28ef1f5SChao Yu unsigned int f2fs_destroy_extent_node(struct inode *inode) 693a28ef1f5SChao Yu { 694a28ef1f5SChao Yu struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 695a28ef1f5SChao Yu struct extent_tree *et = F2FS_I(inode)->extent_tree; 696a28ef1f5SChao Yu unsigned int node_cnt = 0; 697a28ef1f5SChao Yu 6989b72a388SChao Yu if (!et || !atomic_read(&et->node_cnt)) 699a28ef1f5SChao Yu return 0; 700a28ef1f5SChao Yu 701a28ef1f5SChao Yu write_lock(&et->lock); 702201ef5e0SHou Pengyang node_cnt = __free_extent_tree(sbi, et); 703a28ef1f5SChao Yu write_unlock(&et->lock); 704a28ef1f5SChao Yu 705a28ef1f5SChao Yu return node_cnt; 706a28ef1f5SChao Yu } 707a28ef1f5SChao Yu 7085f281fabSJaegeuk Kim void f2fs_drop_extent_tree(struct inode *inode) 7095f281fabSJaegeuk Kim { 7105f281fabSJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 7115f281fabSJaegeuk Kim struct extent_tree *et = F2FS_I(inode)->extent_tree; 712b430f726SZhikang Zhang bool updated = false; 7135f281fabSJaegeuk Kim 714bf617f7aSChao Yu if (!f2fs_may_extent_tree(inode)) 715bf617f7aSChao Yu return; 716bf617f7aSChao Yu 7175f281fabSJaegeuk Kim set_inode_flag(inode, FI_NO_EXTENT); 7185f281fabSJaegeuk Kim 7195f281fabSJaegeuk Kim write_lock(&et->lock); 7205f281fabSJaegeuk Kim __free_extent_tree(sbi, et); 721b430f726SZhikang Zhang if (et->largest.len) { 722b430f726SZhikang Zhang et->largest.len = 0; 723b430f726SZhikang Zhang updated = true; 724b430f726SZhikang Zhang } 7255f281fabSJaegeuk Kim write_unlock(&et->lock); 726b430f726SZhikang Zhang if (updated) 727b430f726SZhikang Zhang f2fs_mark_inode_dirty_sync(inode, true); 7285f281fabSJaegeuk Kim } 7295f281fabSJaegeuk Kim 730a28ef1f5SChao Yu void f2fs_destroy_extent_tree(struct inode *inode) 731a28ef1f5SChao Yu { 732a28ef1f5SChao Yu struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 733a28ef1f5SChao Yu struct extent_tree *et = F2FS_I(inode)->extent_tree; 734a28ef1f5SChao Yu unsigned int node_cnt = 0; 735a28ef1f5SChao Yu 736a28ef1f5SChao Yu if (!et) 737a28ef1f5SChao Yu return; 738a28ef1f5SChao Yu 73968e35385SChao Yu if (inode->i_nlink && !is_bad_inode(inode) && 74068e35385SChao Yu atomic_read(&et->node_cnt)) { 7415e8256acSYunlei He mutex_lock(&sbi->extent_tree_lock); 742137d09f0SJaegeuk Kim list_add_tail(&et->list, &sbi->zombie_list); 74374fd8d99SJaegeuk Kim atomic_inc(&sbi->total_zombie_tree); 7445e8256acSYunlei He mutex_unlock(&sbi->extent_tree_lock); 745a28ef1f5SChao Yu return; 746a28ef1f5SChao Yu } 747a28ef1f5SChao Yu 748a28ef1f5SChao Yu /* free all extent info belong to this extent tree */ 749a28ef1f5SChao Yu node_cnt = f2fs_destroy_extent_node(inode); 750a28ef1f5SChao Yu 751a28ef1f5SChao Yu /* delete extent tree entry in radix tree */ 7525e8256acSYunlei He mutex_lock(&sbi->extent_tree_lock); 75368e35385SChao Yu f2fs_bug_on(sbi, atomic_read(&et->node_cnt)); 754a28ef1f5SChao Yu radix_tree_delete(&sbi->extent_tree_root, inode->i_ino); 755a28ef1f5SChao Yu kmem_cache_free(extent_tree_slab, et); 7567441ccefSJaegeuk Kim atomic_dec(&sbi->total_ext_tree); 7575e8256acSYunlei He mutex_unlock(&sbi->extent_tree_lock); 758a28ef1f5SChao Yu 759a28ef1f5SChao Yu F2FS_I(inode)->extent_tree = NULL; 760a28ef1f5SChao Yu 761a28ef1f5SChao Yu trace_f2fs_destroy_extent_tree(inode, node_cnt); 762a28ef1f5SChao Yu } 763a28ef1f5SChao Yu 764a28ef1f5SChao Yu bool f2fs_lookup_extent_cache(struct inode *inode, pgoff_t pgofs, 765a28ef1f5SChao Yu struct extent_info *ei) 766a28ef1f5SChao Yu { 767a28ef1f5SChao Yu if (!f2fs_may_extent_tree(inode)) 768a28ef1f5SChao Yu return false; 769a28ef1f5SChao Yu 770a28ef1f5SChao Yu return f2fs_lookup_extent_tree(inode, pgofs, ei); 771a28ef1f5SChao Yu } 772a28ef1f5SChao Yu 773a28ef1f5SChao Yu void f2fs_update_extent_cache(struct dnode_of_data *dn) 774a28ef1f5SChao Yu { 775a28ef1f5SChao Yu pgoff_t fofs; 776f28b3434SChao Yu block_t blkaddr; 777a28ef1f5SChao Yu 778a28ef1f5SChao Yu if (!f2fs_may_extent_tree(dn->inode)) 779a28ef1f5SChao Yu return; 780a28ef1f5SChao Yu 781f28b3434SChao Yu if (dn->data_blkaddr == NEW_ADDR) 782f28b3434SChao Yu blkaddr = NULL_ADDR; 783f28b3434SChao Yu else 784f28b3434SChao Yu blkaddr = dn->data_blkaddr; 78519b2c30dSChao Yu 7864d57b86dSChao Yu fofs = f2fs_start_bidx_of_node(ofs_of_node(dn->node_page), dn->inode) + 787a28ef1f5SChao Yu dn->ofs_in_node; 788ee6d182fSJaegeuk Kim f2fs_update_extent_tree_range(dn->inode, fofs, blkaddr, 1); 78919b2c30dSChao Yu } 79019b2c30dSChao Yu 79119b2c30dSChao Yu void f2fs_update_extent_cache_range(struct dnode_of_data *dn, 79219b2c30dSChao Yu pgoff_t fofs, block_t blkaddr, unsigned int len) 79319b2c30dSChao Yu 79419b2c30dSChao Yu { 79519b2c30dSChao Yu if (!f2fs_may_extent_tree(dn->inode)) 79619b2c30dSChao Yu return; 79719b2c30dSChao Yu 798ee6d182fSJaegeuk Kim f2fs_update_extent_tree_range(dn->inode, fofs, blkaddr, len); 799a28ef1f5SChao Yu } 800a28ef1f5SChao Yu 8014d57b86dSChao Yu void f2fs_init_extent_cache_info(struct f2fs_sb_info *sbi) 802a28ef1f5SChao Yu { 803a28ef1f5SChao Yu INIT_RADIX_TREE(&sbi->extent_tree_root, GFP_NOIO); 8045e8256acSYunlei He mutex_init(&sbi->extent_tree_lock); 805a28ef1f5SChao Yu INIT_LIST_HEAD(&sbi->extent_list); 806a28ef1f5SChao Yu spin_lock_init(&sbi->extent_lock); 8077441ccefSJaegeuk Kim atomic_set(&sbi->total_ext_tree, 0); 808137d09f0SJaegeuk Kim INIT_LIST_HEAD(&sbi->zombie_list); 80974fd8d99SJaegeuk Kim atomic_set(&sbi->total_zombie_tree, 0); 810a28ef1f5SChao Yu atomic_set(&sbi->total_ext_node, 0); 811a28ef1f5SChao Yu } 812a28ef1f5SChao Yu 8134d57b86dSChao Yu int __init f2fs_create_extent_cache(void) 814a28ef1f5SChao Yu { 815a28ef1f5SChao Yu extent_tree_slab = f2fs_kmem_cache_create("f2fs_extent_tree", 816a28ef1f5SChao Yu sizeof(struct extent_tree)); 817a28ef1f5SChao Yu if (!extent_tree_slab) 818a28ef1f5SChao Yu return -ENOMEM; 819a28ef1f5SChao Yu extent_node_slab = f2fs_kmem_cache_create("f2fs_extent_node", 820a28ef1f5SChao Yu sizeof(struct extent_node)); 821a28ef1f5SChao Yu if (!extent_node_slab) { 822a28ef1f5SChao Yu kmem_cache_destroy(extent_tree_slab); 823a28ef1f5SChao Yu return -ENOMEM; 824a28ef1f5SChao Yu } 825a28ef1f5SChao Yu return 0; 826a28ef1f5SChao Yu } 827a28ef1f5SChao Yu 8284d57b86dSChao Yu void f2fs_destroy_extent_cache(void) 829a28ef1f5SChao Yu { 830a28ef1f5SChao Yu kmem_cache_destroy(extent_node_slab); 831a28ef1f5SChao Yu kmem_cache_destroy(extent_tree_slab); 832a28ef1f5SChao Yu } 833