Chao Yu | 6d1a832 | 2018-09-12 09:16:07 +0800 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0 |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 2 | /* |
| 3 | * f2fs extent cache support |
| 4 | * |
| 5 | * Copyright (c) 2015 Motorola Mobility |
| 6 | * Copyright (c) 2015 Samsung Electronics |
| 7 | * Authors: Jaegeuk Kim <jaegeuk@kernel.org> |
| 8 | * Chao Yu <chao2.yu@samsung.com> |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 9 | */ |
| 10 | |
| 11 | #include <linux/fs.h> |
| 12 | #include <linux/f2fs_fs.h> |
| 13 | |
| 14 | #include "f2fs.h" |
| 15 | #include "node.h" |
| 16 | #include <trace/events/f2fs.h> |
| 17 | |
Jaegeuk Kim | e6b120d | 2017-07-10 12:55:09 -0700 | [diff] [blame] | 18 | static struct rb_entry *__lookup_rb_tree_fast(struct rb_entry *cached_re, |
| 19 | unsigned int ofs) |
| 20 | { |
| 21 | if (cached_re) { |
| 22 | if (cached_re->ofs <= ofs && |
| 23 | cached_re->ofs + cached_re->len > ofs) { |
| 24 | return cached_re; |
| 25 | } |
| 26 | } |
| 27 | return NULL; |
| 28 | } |
| 29 | |
| 30 | static struct rb_entry *__lookup_rb_tree_slow(struct rb_root *root, |
| 31 | unsigned int ofs) |
| 32 | { |
| 33 | struct rb_node *node = root->rb_node; |
| 34 | struct rb_entry *re; |
| 35 | |
| 36 | while (node) { |
| 37 | re = rb_entry(node, struct rb_entry, rb_node); |
| 38 | |
| 39 | if (ofs < re->ofs) |
| 40 | node = node->rb_left; |
| 41 | else if (ofs >= re->ofs + re->len) |
| 42 | node = node->rb_right; |
| 43 | else |
| 44 | return re; |
| 45 | } |
| 46 | return NULL; |
| 47 | } |
| 48 | |
Chao Yu | 6b4d6a8 | 2018-05-30 00:20:41 +0800 | [diff] [blame] | 49 | struct rb_entry *f2fs_lookup_rb_tree(struct rb_root *root, |
Jaegeuk Kim | e6b120d | 2017-07-10 12:55:09 -0700 | [diff] [blame] | 50 | struct rb_entry *cached_re, unsigned int ofs) |
| 51 | { |
| 52 | struct rb_entry *re; |
| 53 | |
| 54 | re = __lookup_rb_tree_fast(cached_re, ofs); |
| 55 | if (!re) |
| 56 | return __lookup_rb_tree_slow(root, ofs); |
| 57 | |
| 58 | return re; |
| 59 | } |
| 60 | |
Chao Yu | 6b4d6a8 | 2018-05-30 00:20:41 +0800 | [diff] [blame] | 61 | struct rb_node **f2fs_lookup_rb_tree_for_insert(struct f2fs_sb_info *sbi, |
Jaegeuk Kim | e6b120d | 2017-07-10 12:55:09 -0700 | [diff] [blame] | 62 | struct rb_root *root, struct rb_node **parent, |
| 63 | unsigned int ofs) |
| 64 | { |
| 65 | struct rb_node **p = &root->rb_node; |
| 66 | struct rb_entry *re; |
| 67 | |
| 68 | while (*p) { |
| 69 | *parent = *p; |
| 70 | re = rb_entry(*parent, struct rb_entry, rb_node); |
| 71 | |
| 72 | if (ofs < re->ofs) |
| 73 | p = &(*p)->rb_left; |
| 74 | else if (ofs >= re->ofs + re->len) |
| 75 | p = &(*p)->rb_right; |
| 76 | else |
| 77 | f2fs_bug_on(sbi, 1); |
| 78 | } |
| 79 | |
| 80 | return p; |
| 81 | } |
| 82 | |
| 83 | /* |
| 84 | * lookup rb entry in position of @ofs in rb-tree, |
| 85 | * if hit, return the entry, otherwise, return NULL |
| 86 | * @prev_ex: extent before ofs |
| 87 | * @next_ex: extent after ofs |
| 88 | * @insert_p: insert point for new extent at ofs |
| 89 | * in order to simpfy the insertion after. |
| 90 | * tree must stay unchanged between lookup and insertion. |
| 91 | */ |
Chao Yu | 6b4d6a8 | 2018-05-30 00:20:41 +0800 | [diff] [blame] | 92 | struct rb_entry *f2fs_lookup_rb_tree_ret(struct rb_root *root, |
Jaegeuk Kim | e6b120d | 2017-07-10 12:55:09 -0700 | [diff] [blame] | 93 | struct rb_entry *cached_re, |
| 94 | unsigned int ofs, |
| 95 | struct rb_entry **prev_entry, |
| 96 | struct rb_entry **next_entry, |
| 97 | struct rb_node ***insert_p, |
| 98 | struct rb_node **insert_parent, |
| 99 | bool force) |
| 100 | { |
| 101 | struct rb_node **pnode = &root->rb_node; |
| 102 | struct rb_node *parent = NULL, *tmp_node; |
| 103 | struct rb_entry *re = cached_re; |
| 104 | |
| 105 | *insert_p = NULL; |
| 106 | *insert_parent = NULL; |
| 107 | *prev_entry = NULL; |
| 108 | *next_entry = NULL; |
| 109 | |
| 110 | if (RB_EMPTY_ROOT(root)) |
| 111 | return NULL; |
| 112 | |
| 113 | if (re) { |
| 114 | if (re->ofs <= ofs && re->ofs + re->len > ofs) |
| 115 | goto lookup_neighbors; |
| 116 | } |
| 117 | |
| 118 | while (*pnode) { |
| 119 | parent = *pnode; |
| 120 | re = rb_entry(*pnode, struct rb_entry, rb_node); |
| 121 | |
| 122 | if (ofs < re->ofs) |
| 123 | pnode = &(*pnode)->rb_left; |
| 124 | else if (ofs >= re->ofs + re->len) |
| 125 | pnode = &(*pnode)->rb_right; |
| 126 | else |
| 127 | goto lookup_neighbors; |
| 128 | } |
| 129 | |
| 130 | *insert_p = pnode; |
| 131 | *insert_parent = parent; |
| 132 | |
| 133 | re = rb_entry(parent, struct rb_entry, rb_node); |
| 134 | tmp_node = parent; |
| 135 | if (parent && ofs > re->ofs) |
| 136 | tmp_node = rb_next(parent); |
| 137 | *next_entry = rb_entry_safe(tmp_node, struct rb_entry, rb_node); |
| 138 | |
| 139 | tmp_node = parent; |
| 140 | if (parent && ofs < re->ofs) |
| 141 | tmp_node = rb_prev(parent); |
| 142 | *prev_entry = rb_entry_safe(tmp_node, struct rb_entry, rb_node); |
| 143 | return NULL; |
| 144 | |
| 145 | lookup_neighbors: |
| 146 | if (ofs == re->ofs || force) { |
| 147 | /* lookup prev node for merging backward later */ |
| 148 | tmp_node = rb_prev(&re->rb_node); |
| 149 | *prev_entry = rb_entry_safe(tmp_node, struct rb_entry, rb_node); |
| 150 | } |
| 151 | if (ofs == re->ofs + re->len - 1 || force) { |
| 152 | /* lookup next node for merging frontward later */ |
| 153 | tmp_node = rb_next(&re->rb_node); |
| 154 | *next_entry = rb_entry_safe(tmp_node, struct rb_entry, rb_node); |
| 155 | } |
| 156 | return re; |
| 157 | } |
| 158 | |
Chao Yu | 6b4d6a8 | 2018-05-30 00:20:41 +0800 | [diff] [blame] | 159 | bool f2fs_check_rb_tree_consistence(struct f2fs_sb_info *sbi, |
Jaegeuk Kim | e6b120d | 2017-07-10 12:55:09 -0700 | [diff] [blame] | 160 | struct rb_root *root) |
| 161 | { |
| 162 | #ifdef CONFIG_F2FS_CHECK_FS |
| 163 | struct rb_node *cur = rb_first(root), *next; |
| 164 | struct rb_entry *cur_re, *next_re; |
| 165 | |
| 166 | if (!cur) |
| 167 | return true; |
| 168 | |
| 169 | while (cur) { |
| 170 | next = rb_next(cur); |
| 171 | if (!next) |
| 172 | return true; |
| 173 | |
| 174 | cur_re = rb_entry(cur, struct rb_entry, rb_node); |
| 175 | next_re = rb_entry(next, struct rb_entry, rb_node); |
| 176 | |
| 177 | if (cur_re->ofs + cur_re->len > next_re->ofs) { |
| 178 | f2fs_msg(sbi->sb, KERN_INFO, "inconsistent rbtree, " |
| 179 | "cur(%u, %u) next(%u, %u)", |
| 180 | cur_re->ofs, cur_re->len, |
| 181 | next_re->ofs, next_re->len); |
| 182 | return false; |
| 183 | } |
| 184 | |
| 185 | cur = next; |
| 186 | } |
| 187 | #endif |
| 188 | return true; |
| 189 | } |
| 190 | |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 191 | static struct kmem_cache *extent_tree_slab; |
| 192 | static struct kmem_cache *extent_node_slab; |
| 193 | |
| 194 | static struct extent_node *__attach_extent_node(struct f2fs_sb_info *sbi, |
| 195 | struct extent_tree *et, struct extent_info *ei, |
| 196 | struct rb_node *parent, struct rb_node **p) |
| 197 | { |
| 198 | struct extent_node *en; |
| 199 | |
| 200 | en = kmem_cache_alloc(extent_node_slab, GFP_ATOMIC); |
| 201 | if (!en) |
| 202 | return NULL; |
| 203 | |
| 204 | en->ei = *ei; |
| 205 | INIT_LIST_HEAD(&en->list); |
Hou Pengyang | 201ef5e | 2016-01-26 12:56:26 +0000 | [diff] [blame] | 206 | en->et = et; |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 207 | |
| 208 | rb_link_node(&en->rb_node, parent, p); |
| 209 | rb_insert_color(&en->rb_node, &et->root); |
Chao Yu | 68e3538 | 2016-01-08 20:22:52 +0800 | [diff] [blame] | 210 | atomic_inc(&et->node_cnt); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 211 | atomic_inc(&sbi->total_ext_node); |
| 212 | return en; |
| 213 | } |
| 214 | |
| 215 | static void __detach_extent_node(struct f2fs_sb_info *sbi, |
| 216 | struct extent_tree *et, struct extent_node *en) |
| 217 | { |
| 218 | rb_erase(&en->rb_node, &et->root); |
Chao Yu | 68e3538 | 2016-01-08 20:22:52 +0800 | [diff] [blame] | 219 | atomic_dec(&et->node_cnt); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 220 | atomic_dec(&sbi->total_ext_node); |
| 221 | |
| 222 | if (et->cached_en == en) |
| 223 | et->cached_en = NULL; |
Hou Pengyang | a03f01f | 2016-01-26 12:56:25 +0000 | [diff] [blame] | 224 | kmem_cache_free(extent_node_slab, en); |
| 225 | } |
| 226 | |
| 227 | /* |
| 228 | * Flow to release an extent_node: |
| 229 | * 1. list_del_init |
| 230 | * 2. __detach_extent_node |
| 231 | * 3. kmem_cache_free. |
| 232 | */ |
| 233 | static void __release_extent_node(struct f2fs_sb_info *sbi, |
| 234 | struct extent_tree *et, struct extent_node *en) |
| 235 | { |
| 236 | spin_lock(&sbi->extent_lock); |
Hou Pengyang | 201ef5e | 2016-01-26 12:56:26 +0000 | [diff] [blame] | 237 | f2fs_bug_on(sbi, list_empty(&en->list)); |
| 238 | list_del_init(&en->list); |
Hou Pengyang | a03f01f | 2016-01-26 12:56:25 +0000 | [diff] [blame] | 239 | spin_unlock(&sbi->extent_lock); |
| 240 | |
| 241 | __detach_extent_node(sbi, et, en); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 242 | } |
| 243 | |
| 244 | static struct extent_tree *__grab_extent_tree(struct inode *inode) |
| 245 | { |
| 246 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 247 | struct extent_tree *et; |
| 248 | nid_t ino = inode->i_ino; |
| 249 | |
Jaegeuk Kim | e6b120d | 2017-07-10 12:55:09 -0700 | [diff] [blame] | 250 | mutex_lock(&sbi->extent_tree_lock); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 251 | et = radix_tree_lookup(&sbi->extent_tree_root, ino); |
| 252 | if (!et) { |
| 253 | et = f2fs_kmem_cache_alloc(extent_tree_slab, GFP_NOFS); |
| 254 | f2fs_radix_tree_insert(&sbi->extent_tree_root, ino, et); |
| 255 | memset(et, 0, sizeof(struct extent_tree)); |
| 256 | et->ino = ino; |
| 257 | et->root = RB_ROOT; |
| 258 | et->cached_en = NULL; |
| 259 | rwlock_init(&et->lock); |
Jaegeuk Kim | 137d09f | 2015-12-31 15:02:16 -0800 | [diff] [blame] | 260 | INIT_LIST_HEAD(&et->list); |
Chao Yu | 68e3538 | 2016-01-08 20:22:52 +0800 | [diff] [blame] | 261 | atomic_set(&et->node_cnt, 0); |
Jaegeuk Kim | 7441cce | 2015-12-21 19:20:15 -0800 | [diff] [blame] | 262 | atomic_inc(&sbi->total_ext_tree); |
Jaegeuk Kim | 74fd8d9 | 2015-12-21 19:25:50 -0800 | [diff] [blame] | 263 | } else { |
| 264 | atomic_dec(&sbi->total_zombie_tree); |
Jaegeuk Kim | 137d09f | 2015-12-31 15:02:16 -0800 | [diff] [blame] | 265 | list_del_init(&et->list); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 266 | } |
Jaegeuk Kim | e6b120d | 2017-07-10 12:55:09 -0700 | [diff] [blame] | 267 | mutex_unlock(&sbi->extent_tree_lock); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 268 | |
| 269 | /* never died until evict_inode */ |
| 270 | F2FS_I(inode)->extent_tree = et; |
| 271 | |
| 272 | return et; |
| 273 | } |
| 274 | |
Chao Yu | a6f7834 | 2015-08-19 19:14:15 +0800 | [diff] [blame] | 275 | static struct extent_node *__init_extent_tree(struct f2fs_sb_info *sbi, |
| 276 | struct extent_tree *et, struct extent_info *ei) |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 277 | { |
| 278 | struct rb_node **p = &et->root.rb_node; |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 279 | struct extent_node *en; |
| 280 | |
Chao Yu | a6f7834 | 2015-08-19 19:14:15 +0800 | [diff] [blame] | 281 | en = __attach_extent_node(sbi, et, ei, NULL, p); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 282 | if (!en) |
| 283 | return NULL; |
Chao Yu | a6f7834 | 2015-08-19 19:14:15 +0800 | [diff] [blame] | 284 | |
| 285 | et->largest = en->ei; |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 286 | et->cached_en = en; |
| 287 | return en; |
| 288 | } |
| 289 | |
| 290 | static unsigned int __free_extent_tree(struct f2fs_sb_info *sbi, |
Hou Pengyang | 201ef5e | 2016-01-26 12:56:26 +0000 | [diff] [blame] | 291 | struct extent_tree *et) |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 292 | { |
| 293 | struct rb_node *node, *next; |
| 294 | struct extent_node *en; |
Chao Yu | 68e3538 | 2016-01-08 20:22:52 +0800 | [diff] [blame] | 295 | unsigned int count = atomic_read(&et->node_cnt); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 296 | |
| 297 | node = rb_first(&et->root); |
| 298 | while (node) { |
| 299 | next = rb_next(node); |
| 300 | en = rb_entry(node, struct extent_node, rb_node); |
Hou Pengyang | 201ef5e | 2016-01-26 12:56:26 +0000 | [diff] [blame] | 301 | __release_extent_node(sbi, et, en); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 302 | node = next; |
| 303 | } |
| 304 | |
Chao Yu | 68e3538 | 2016-01-08 20:22:52 +0800 | [diff] [blame] | 305 | return count - atomic_read(&et->node_cnt); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 306 | } |
| 307 | |
Zhikang Zhang | 4c3226a | 2018-09-10 16:18:25 +0800 | [diff] [blame] | 308 | static void __drop_largest_extent(struct extent_tree *et, |
Fan Li | 41a099d | 2015-09-17 18:24:17 +0800 | [diff] [blame] | 309 | pgoff_t fofs, unsigned int len) |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 310 | { |
Zhikang Zhang | 4c3226a | 2018-09-10 16:18:25 +0800 | [diff] [blame] | 311 | if (fofs < et->largest.fofs + et->largest.len && |
| 312 | fofs + len > et->largest.fofs) { |
| 313 | et->largest.len = 0; |
| 314 | et->largest_updated = true; |
Jaegeuk Kim | 205b982 | 2016-05-20 09:52:20 -0700 | [diff] [blame] | 315 | } |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 316 | } |
| 317 | |
Jaegeuk Kim | ed3d125 | 2015-12-28 11:39:06 -0800 | [diff] [blame] | 318 | /* return true, if inode page is changed */ |
Yunlei He | 8b28a08 | 2017-05-19 15:06:12 +0800 | [diff] [blame] | 319 | static bool __f2fs_init_extent_tree(struct inode *inode, struct f2fs_extent *i_ext) |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 320 | { |
| 321 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 322 | struct extent_tree *et; |
| 323 | struct extent_node *en; |
| 324 | struct extent_info ei; |
| 325 | |
Jaegeuk Kim | ed3d125 | 2015-12-28 11:39:06 -0800 | [diff] [blame] | 326 | if (!f2fs_may_extent_tree(inode)) { |
| 327 | /* drop largest extent */ |
| 328 | if (i_ext && i_ext->len) { |
| 329 | i_ext->len = 0; |
| 330 | return true; |
| 331 | } |
| 332 | return false; |
| 333 | } |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 334 | |
| 335 | et = __grab_extent_tree(inode); |
| 336 | |
Jaegeuk Kim | ed3d125 | 2015-12-28 11:39:06 -0800 | [diff] [blame] | 337 | if (!i_ext || !i_ext->len) |
| 338 | return false; |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 339 | |
Chao Yu | bd933d4 | 2016-05-04 23:19:47 +0800 | [diff] [blame] | 340 | get_extent_info(&ei, i_ext); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 341 | |
| 342 | write_lock(&et->lock); |
Chao Yu | 68e3538 | 2016-01-08 20:22:52 +0800 | [diff] [blame] | 343 | if (atomic_read(&et->node_cnt)) |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 344 | goto out; |
| 345 | |
Chao Yu | a6f7834 | 2015-08-19 19:14:15 +0800 | [diff] [blame] | 346 | en = __init_extent_tree(sbi, et, &ei); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 347 | if (en) { |
| 348 | spin_lock(&sbi->extent_lock); |
| 349 | list_add_tail(&en->list, &sbi->extent_list); |
| 350 | spin_unlock(&sbi->extent_lock); |
| 351 | } |
| 352 | out: |
| 353 | write_unlock(&et->lock); |
Jaegeuk Kim | ed3d125 | 2015-12-28 11:39:06 -0800 | [diff] [blame] | 354 | return false; |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 355 | } |
| 356 | |
Yunlei He | 8b28a08 | 2017-05-19 15:06:12 +0800 | [diff] [blame] | 357 | bool f2fs_init_extent_tree(struct inode *inode, struct f2fs_extent *i_ext) |
| 358 | { |
| 359 | bool ret = __f2fs_init_extent_tree(inode, i_ext); |
| 360 | |
| 361 | if (!F2FS_I(inode)->extent_tree) |
| 362 | set_inode_flag(inode, FI_NO_EXTENT); |
| 363 | |
| 364 | return ret; |
| 365 | } |
| 366 | |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 367 | static bool f2fs_lookup_extent_tree(struct inode *inode, pgoff_t pgofs, |
| 368 | struct extent_info *ei) |
| 369 | { |
| 370 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 371 | struct extent_tree *et = F2FS_I(inode)->extent_tree; |
| 372 | struct extent_node *en; |
| 373 | bool ret = false; |
| 374 | |
| 375 | f2fs_bug_on(sbi, !et); |
| 376 | |
| 377 | trace_f2fs_lookup_extent_tree_start(inode, pgofs); |
| 378 | |
| 379 | read_lock(&et->lock); |
| 380 | |
| 381 | if (et->largest.fofs <= pgofs && |
| 382 | et->largest.fofs + et->largest.len > pgofs) { |
| 383 | *ei = et->largest; |
| 384 | ret = true; |
Chao Yu | 91c481f | 2015-08-19 19:12:20 +0800 | [diff] [blame] | 385 | stat_inc_largest_node_hit(sbi); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 386 | goto out; |
| 387 | } |
| 388 | |
Chao Yu | 6b4d6a8 | 2018-05-30 00:20:41 +0800 | [diff] [blame] | 389 | en = (struct extent_node *)f2fs_lookup_rb_tree(&et->root, |
Jaegeuk Kim | e6b120d | 2017-07-10 12:55:09 -0700 | [diff] [blame] | 390 | (struct rb_entry *)et->cached_en, pgofs); |
| 391 | if (!en) |
| 392 | goto out; |
| 393 | |
| 394 | if (en == et->cached_en) |
| 395 | stat_inc_cached_node_hit(sbi); |
| 396 | else |
| 397 | stat_inc_rbtree_node_hit(sbi); |
| 398 | |
| 399 | *ei = en->ei; |
| 400 | spin_lock(&sbi->extent_lock); |
| 401 | if (!list_empty(&en->list)) { |
| 402 | list_move_tail(&en->list, &sbi->extent_list); |
| 403 | et->cached_en = en; |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 404 | } |
Jaegeuk Kim | e6b120d | 2017-07-10 12:55:09 -0700 | [diff] [blame] | 405 | spin_unlock(&sbi->extent_lock); |
| 406 | ret = true; |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 407 | out: |
Chao Yu | 727edac | 2015-07-15 17:29:49 +0800 | [diff] [blame] | 408 | stat_inc_total_hit(sbi); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 409 | read_unlock(&et->lock); |
| 410 | |
| 411 | trace_f2fs_lookup_extent_tree_end(inode, pgofs, ei); |
| 412 | return ret; |
| 413 | } |
| 414 | |
Zhikang Zhang | 4c3226a | 2018-09-10 16:18:25 +0800 | [diff] [blame] | 415 | static struct extent_node *__try_merge_extent_node(struct f2fs_sb_info *sbi, |
Fan Li | 0f825ee | 2015-07-15 18:05:17 +0800 | [diff] [blame] | 416 | struct extent_tree *et, struct extent_info *ei, |
Fan Li | 0f825ee | 2015-07-15 18:05:17 +0800 | [diff] [blame] | 417 | struct extent_node *prev_ex, |
Chao Yu | ef05e22 | 2015-08-19 19:15:09 +0800 | [diff] [blame] | 418 | struct extent_node *next_ex) |
Fan Li | 0f825ee | 2015-07-15 18:05:17 +0800 | [diff] [blame] | 419 | { |
Fan Li | 0f825ee | 2015-07-15 18:05:17 +0800 | [diff] [blame] | 420 | struct extent_node *en = NULL; |
Fan Li | 0f825ee | 2015-07-15 18:05:17 +0800 | [diff] [blame] | 421 | |
| 422 | if (prev_ex && __is_back_mergeable(ei, &prev_ex->ei)) { |
Fan Li | 0f825ee | 2015-07-15 18:05:17 +0800 | [diff] [blame] | 423 | prev_ex->ei.len += ei->len; |
| 424 | ei = &prev_ex->ei; |
| 425 | en = prev_ex; |
| 426 | } |
Chao Yu | ef05e22 | 2015-08-19 19:15:09 +0800 | [diff] [blame] | 427 | |
Fan Li | 0f825ee | 2015-07-15 18:05:17 +0800 | [diff] [blame] | 428 | if (next_ex && __is_front_mergeable(ei, &next_ex->ei)) { |
Fan Li | 0f825ee | 2015-07-15 18:05:17 +0800 | [diff] [blame] | 429 | next_ex->ei.fofs = ei->fofs; |
| 430 | next_ex->ei.blk = ei->blk; |
| 431 | next_ex->ei.len += ei->len; |
Yunlei He | ec160ad | 2016-12-19 20:10:48 +0800 | [diff] [blame] | 432 | if (en) |
| 433 | __release_extent_node(sbi, et, prev_ex); |
| 434 | |
Fan Li | 0f825ee | 2015-07-15 18:05:17 +0800 | [diff] [blame] | 435 | en = next_ex; |
| 436 | } |
Chao Yu | ef05e22 | 2015-08-19 19:15:09 +0800 | [diff] [blame] | 437 | |
Jaegeuk Kim | 43a2fa1 | 2016-01-26 09:12:50 -0800 | [diff] [blame] | 438 | if (!en) |
| 439 | return NULL; |
| 440 | |
Zhikang Zhang | 4c3226a | 2018-09-10 16:18:25 +0800 | [diff] [blame] | 441 | __try_update_largest_extent(et, en); |
Jaegeuk Kim | 43a2fa1 | 2016-01-26 09:12:50 -0800 | [diff] [blame] | 442 | |
| 443 | spin_lock(&sbi->extent_lock); |
Jaegeuk Kim | 4292674 | 2016-01-26 09:20:05 -0800 | [diff] [blame] | 444 | if (!list_empty(&en->list)) { |
Jaegeuk Kim | 43a2fa1 | 2016-01-26 09:12:50 -0800 | [diff] [blame] | 445 | list_move_tail(&en->list, &sbi->extent_list); |
Jaegeuk Kim | 4292674 | 2016-01-26 09:20:05 -0800 | [diff] [blame] | 446 | et->cached_en = en; |
| 447 | } |
Jaegeuk Kim | 43a2fa1 | 2016-01-26 09:12:50 -0800 | [diff] [blame] | 448 | spin_unlock(&sbi->extent_lock); |
Chao Yu | ef05e22 | 2015-08-19 19:15:09 +0800 | [diff] [blame] | 449 | return en; |
| 450 | } |
| 451 | |
Zhikang Zhang | 4c3226a | 2018-09-10 16:18:25 +0800 | [diff] [blame] | 452 | static struct extent_node *__insert_extent_tree(struct f2fs_sb_info *sbi, |
Chao Yu | ef05e22 | 2015-08-19 19:15:09 +0800 | [diff] [blame] | 453 | struct extent_tree *et, struct extent_info *ei, |
| 454 | struct rb_node **insert_p, |
| 455 | struct rb_node *insert_parent) |
| 456 | { |
Colin Ian King | 939f6be | 2018-02-21 18:13:40 +0000 | [diff] [blame] | 457 | struct rb_node **p; |
Chao Yu | ef05e22 | 2015-08-19 19:15:09 +0800 | [diff] [blame] | 458 | struct rb_node *parent = NULL; |
| 459 | struct extent_node *en = NULL; |
Fan Li | 0f825ee | 2015-07-15 18:05:17 +0800 | [diff] [blame] | 460 | |
| 461 | if (insert_p && insert_parent) { |
| 462 | parent = insert_parent; |
| 463 | p = insert_p; |
| 464 | goto do_insert; |
| 465 | } |
| 466 | |
Chao Yu | 6b4d6a8 | 2018-05-30 00:20:41 +0800 | [diff] [blame] | 467 | p = f2fs_lookup_rb_tree_for_insert(sbi, &et->root, &parent, ei->fofs); |
Fan Li | 0f825ee | 2015-07-15 18:05:17 +0800 | [diff] [blame] | 468 | do_insert: |
| 469 | en = __attach_extent_node(sbi, et, ei, parent, p); |
| 470 | if (!en) |
| 471 | return NULL; |
Chao Yu | ef05e22 | 2015-08-19 19:15:09 +0800 | [diff] [blame] | 472 | |
Zhikang Zhang | 4c3226a | 2018-09-10 16:18:25 +0800 | [diff] [blame] | 473 | __try_update_largest_extent(et, en); |
Jaegeuk Kim | 43a2fa1 | 2016-01-26 09:12:50 -0800 | [diff] [blame] | 474 | |
| 475 | /* update in global extent list */ |
| 476 | spin_lock(&sbi->extent_lock); |
| 477 | list_add_tail(&en->list, &sbi->extent_list); |
Jaegeuk Kim | 4292674 | 2016-01-26 09:20:05 -0800 | [diff] [blame] | 478 | et->cached_en = en; |
Jaegeuk Kim | 43a2fa1 | 2016-01-26 09:12:50 -0800 | [diff] [blame] | 479 | spin_unlock(&sbi->extent_lock); |
Fan Li | 0f825ee | 2015-07-15 18:05:17 +0800 | [diff] [blame] | 480 | return en; |
| 481 | } |
| 482 | |
Jaegeuk Kim | e6b120d | 2017-07-10 12:55:09 -0700 | [diff] [blame] | 483 | static void f2fs_update_extent_tree_range(struct inode *inode, |
Chao Yu | 19b2c30 | 2015-08-26 20:34:48 +0800 | [diff] [blame] | 484 | pgoff_t fofs, block_t blkaddr, unsigned int len) |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 485 | { |
| 486 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 487 | struct extent_tree *et = F2FS_I(inode)->extent_tree; |
Fan Li | 4d1fa81 | 2015-09-17 18:42:06 +0800 | [diff] [blame] | 488 | struct extent_node *en = NULL, *en1 = NULL; |
Chao Yu | 19b2c30 | 2015-08-26 20:34:48 +0800 | [diff] [blame] | 489 | struct extent_node *prev_en = NULL, *next_en = NULL; |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 490 | struct extent_info ei, dei, prev; |
Fan Li | 0f825ee | 2015-07-15 18:05:17 +0800 | [diff] [blame] | 491 | struct rb_node **insert_p = NULL, *insert_parent = NULL; |
Chao Yu | 19b2c30 | 2015-08-26 20:34:48 +0800 | [diff] [blame] | 492 | unsigned int end = fofs + len; |
| 493 | unsigned int pos = (unsigned int)fofs; |
Zhikang Zhang | 4c3226a | 2018-09-10 16:18:25 +0800 | [diff] [blame] | 494 | bool updated = false; |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 495 | |
| 496 | if (!et) |
Jaegeuk Kim | e6b120d | 2017-07-10 12:55:09 -0700 | [diff] [blame] | 497 | return; |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 498 | |
Chao Yu | 744288c | 2015-09-06 17:50:13 +0800 | [diff] [blame] | 499 | trace_f2fs_update_extent_tree_range(inode, fofs, blkaddr, len); |
| 500 | |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 501 | write_lock(&et->lock); |
| 502 | |
Jaegeuk Kim | 9194232 | 2016-05-20 10:13:22 -0700 | [diff] [blame] | 503 | if (is_inode_flag_set(inode, FI_NO_EXTENT)) { |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 504 | write_unlock(&et->lock); |
Jaegeuk Kim | e6b120d | 2017-07-10 12:55:09 -0700 | [diff] [blame] | 505 | return; |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 506 | } |
| 507 | |
| 508 | prev = et->largest; |
| 509 | dei.len = 0; |
| 510 | |
Fan Li | 4d1fa81 | 2015-09-17 18:42:06 +0800 | [diff] [blame] | 511 | /* |
| 512 | * drop largest extent before lookup, in case it's already |
| 513 | * been shrunk from extent tree |
| 514 | */ |
Zhikang Zhang | 4c3226a | 2018-09-10 16:18:25 +0800 | [diff] [blame] | 515 | __drop_largest_extent(et, fofs, len); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 516 | |
Chao Yu | 19b2c30 | 2015-08-26 20:34:48 +0800 | [diff] [blame] | 517 | /* 1. lookup first extent node in range [fofs, fofs + len - 1] */ |
Chao Yu | 6b4d6a8 | 2018-05-30 00:20:41 +0800 | [diff] [blame] | 518 | en = (struct extent_node *)f2fs_lookup_rb_tree_ret(&et->root, |
Jaegeuk Kim | e6b120d | 2017-07-10 12:55:09 -0700 | [diff] [blame] | 519 | (struct rb_entry *)et->cached_en, fofs, |
| 520 | (struct rb_entry **)&prev_en, |
| 521 | (struct rb_entry **)&next_en, |
| 522 | &insert_p, &insert_parent, false); |
Fan Li | 4d1fa81 | 2015-09-17 18:42:06 +0800 | [diff] [blame] | 523 | if (!en) |
| 524 | en = next_en; |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 525 | |
Chao Yu | 19b2c30 | 2015-08-26 20:34:48 +0800 | [diff] [blame] | 526 | /* 2. invlidate all extent nodes in range [fofs, fofs + len - 1] */ |
Fan Li | 4d1fa81 | 2015-09-17 18:42:06 +0800 | [diff] [blame] | 527 | while (en && en->ei.fofs < end) { |
| 528 | unsigned int org_end; |
| 529 | int parts = 0; /* # of parts current extent split into */ |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 530 | |
Fan Li | 4d1fa81 | 2015-09-17 18:42:06 +0800 | [diff] [blame] | 531 | next_en = en1 = NULL; |
Chao Yu | 19b2c30 | 2015-08-26 20:34:48 +0800 | [diff] [blame] | 532 | |
| 533 | dei = en->ei; |
Fan Li | 4d1fa81 | 2015-09-17 18:42:06 +0800 | [diff] [blame] | 534 | org_end = dei.fofs + dei.len; |
| 535 | f2fs_bug_on(sbi, pos >= org_end); |
Chao Yu | 19b2c30 | 2015-08-26 20:34:48 +0800 | [diff] [blame] | 536 | |
Fan Li | 4d1fa81 | 2015-09-17 18:42:06 +0800 | [diff] [blame] | 537 | if (pos > dei.fofs && pos - dei.fofs >= F2FS_MIN_EXTENT_LEN) { |
| 538 | en->ei.len = pos - en->ei.fofs; |
| 539 | prev_en = en; |
| 540 | parts = 1; |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 541 | } |
| 542 | |
Fan Li | 4d1fa81 | 2015-09-17 18:42:06 +0800 | [diff] [blame] | 543 | if (end < org_end && org_end - end >= F2FS_MIN_EXTENT_LEN) { |
| 544 | if (parts) { |
Chao Yu | 19b2c30 | 2015-08-26 20:34:48 +0800 | [diff] [blame] | 545 | set_extent_info(&ei, end, |
| 546 | end - dei.fofs + dei.blk, |
Fan Li | 4d1fa81 | 2015-09-17 18:42:06 +0800 | [diff] [blame] | 547 | org_end - end); |
Zhikang Zhang | 4c3226a | 2018-09-10 16:18:25 +0800 | [diff] [blame] | 548 | en1 = __insert_extent_tree(sbi, et, &ei, |
Fan Li | 4d1fa81 | 2015-09-17 18:42:06 +0800 | [diff] [blame] | 549 | NULL, NULL); |
| 550 | next_en = en1; |
| 551 | } else { |
| 552 | en->ei.fofs = end; |
| 553 | en->ei.blk += end - dei.fofs; |
| 554 | en->ei.len -= end - dei.fofs; |
| 555 | next_en = en; |
Chao Yu | 19b2c30 | 2015-08-26 20:34:48 +0800 | [diff] [blame] | 556 | } |
Fan Li | 4d1fa81 | 2015-09-17 18:42:06 +0800 | [diff] [blame] | 557 | parts++; |
Chao Yu | 19b2c30 | 2015-08-26 20:34:48 +0800 | [diff] [blame] | 558 | } |
Fan Li | 4d1fa81 | 2015-09-17 18:42:06 +0800 | [diff] [blame] | 559 | |
| 560 | if (!next_en) { |
| 561 | struct rb_node *node = rb_next(&en->rb_node); |
| 562 | |
Jaegeuk Kim | e6b120d | 2017-07-10 12:55:09 -0700 | [diff] [blame] | 563 | next_en = rb_entry_safe(node, struct extent_node, |
| 564 | rb_node); |
Fan Li | 4d1fa81 | 2015-09-17 18:42:06 +0800 | [diff] [blame] | 565 | } |
| 566 | |
Chao Yu | 4abd3f5 | 2015-09-22 21:07:47 +0800 | [diff] [blame] | 567 | if (parts) |
Zhikang Zhang | 4c3226a | 2018-09-10 16:18:25 +0800 | [diff] [blame] | 568 | __try_update_largest_extent(et, en); |
Chao Yu | 4abd3f5 | 2015-09-22 21:07:47 +0800 | [diff] [blame] | 569 | else |
Hou Pengyang | a03f01f | 2016-01-26 12:56:25 +0000 | [diff] [blame] | 570 | __release_extent_node(sbi, et, en); |
Fan Li | 4d1fa81 | 2015-09-17 18:42:06 +0800 | [diff] [blame] | 571 | |
| 572 | /* |
| 573 | * if original extent is split into zero or two parts, extent |
| 574 | * tree has been altered by deletion or insertion, therefore |
| 575 | * invalidate pointers regard to tree. |
| 576 | */ |
| 577 | if (parts != 1) { |
| 578 | insert_p = NULL; |
| 579 | insert_parent = NULL; |
| 580 | } |
Fan Li | 4d1fa81 | 2015-09-17 18:42:06 +0800 | [diff] [blame] | 581 | en = next_en; |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 582 | } |
| 583 | |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 584 | /* 3. update extent in extent cache */ |
| 585 | if (blkaddr) { |
Chao Yu | 19b2c30 | 2015-08-26 20:34:48 +0800 | [diff] [blame] | 586 | |
| 587 | set_extent_info(&ei, fofs, blkaddr, len); |
Zhikang Zhang | 4c3226a | 2018-09-10 16:18:25 +0800 | [diff] [blame] | 588 | if (!__try_merge_extent_node(sbi, et, &ei, prev_en, next_en)) |
| 589 | __insert_extent_tree(sbi, et, &ei, |
Chao Yu | ef05e22 | 2015-08-19 19:15:09 +0800 | [diff] [blame] | 590 | insert_p, insert_parent); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 591 | |
| 592 | /* give up extent_cache, if split and small updates happen */ |
| 593 | if (dei.len >= 1 && |
| 594 | prev.len < F2FS_MIN_EXTENT_LEN && |
| 595 | et->largest.len < F2FS_MIN_EXTENT_LEN) { |
Zhikang Zhang | 4c3226a | 2018-09-10 16:18:25 +0800 | [diff] [blame] | 596 | et->largest.len = 0; |
| 597 | et->largest_updated = true; |
Jaegeuk Kim | 9194232 | 2016-05-20 10:13:22 -0700 | [diff] [blame] | 598 | set_inode_flag(inode, FI_NO_EXTENT); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 599 | } |
Chao Yu | 19b2c30 | 2015-08-26 20:34:48 +0800 | [diff] [blame] | 600 | } |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 601 | |
Jaegeuk Kim | 9194232 | 2016-05-20 10:13:22 -0700 | [diff] [blame] | 602 | if (is_inode_flag_set(inode, FI_NO_EXTENT)) |
Hou Pengyang | 201ef5e | 2016-01-26 12:56:26 +0000 | [diff] [blame] | 603 | __free_extent_tree(sbi, et); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 604 | |
Zhikang Zhang | 4c3226a | 2018-09-10 16:18:25 +0800 | [diff] [blame] | 605 | if (et->largest_updated) { |
| 606 | et->largest_updated = false; |
| 607 | updated = true; |
| 608 | } |
| 609 | |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 610 | write_unlock(&et->lock); |
Zhikang Zhang | 4c3226a | 2018-09-10 16:18:25 +0800 | [diff] [blame] | 611 | |
| 612 | if (updated) |
| 613 | f2fs_mark_inode_dirty_sync(inode, true); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 614 | } |
| 615 | |
| 616 | unsigned int f2fs_shrink_extent_tree(struct f2fs_sb_info *sbi, int nr_shrink) |
| 617 | { |
Jaegeuk Kim | 137d09f | 2015-12-31 15:02:16 -0800 | [diff] [blame] | 618 | struct extent_tree *et, *next; |
Hou Pengyang | 201ef5e | 2016-01-26 12:56:26 +0000 | [diff] [blame] | 619 | struct extent_node *en; |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 620 | unsigned int node_cnt = 0, tree_cnt = 0; |
| 621 | int remained; |
| 622 | |
| 623 | if (!test_opt(sbi, EXTENT_CACHE)) |
| 624 | return 0; |
| 625 | |
Jaegeuk Kim | 74fd8d9 | 2015-12-21 19:25:50 -0800 | [diff] [blame] | 626 | if (!atomic_read(&sbi->total_zombie_tree)) |
| 627 | goto free_node; |
| 628 | |
Jaegeuk Kim | e6b120d | 2017-07-10 12:55:09 -0700 | [diff] [blame] | 629 | if (!mutex_trylock(&sbi->extent_tree_lock)) |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 630 | goto out; |
| 631 | |
| 632 | /* 1. remove unreferenced extent tree */ |
Jaegeuk Kim | 137d09f | 2015-12-31 15:02:16 -0800 | [diff] [blame] | 633 | list_for_each_entry_safe(et, next, &sbi->zombie_list, list) { |
Chao Yu | 9b72a38 | 2016-01-08 20:24:00 +0800 | [diff] [blame] | 634 | if (atomic_read(&et->node_cnt)) { |
| 635 | write_lock(&et->lock); |
Hou Pengyang | 201ef5e | 2016-01-26 12:56:26 +0000 | [diff] [blame] | 636 | node_cnt += __free_extent_tree(sbi, et); |
Chao Yu | 9b72a38 | 2016-01-08 20:24:00 +0800 | [diff] [blame] | 637 | write_unlock(&et->lock); |
| 638 | } |
Hou Pengyang | 201ef5e | 2016-01-26 12:56:26 +0000 | [diff] [blame] | 639 | f2fs_bug_on(sbi, atomic_read(&et->node_cnt)); |
Jaegeuk Kim | 137d09f | 2015-12-31 15:02:16 -0800 | [diff] [blame] | 640 | list_del_init(&et->list); |
| 641 | radix_tree_delete(&sbi->extent_tree_root, et->ino); |
| 642 | kmem_cache_free(extent_tree_slab, et); |
| 643 | atomic_dec(&sbi->total_ext_tree); |
| 644 | atomic_dec(&sbi->total_zombie_tree); |
| 645 | tree_cnt++; |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 646 | |
Jaegeuk Kim | 137d09f | 2015-12-31 15:02:16 -0800 | [diff] [blame] | 647 | if (node_cnt + tree_cnt >= nr_shrink) |
| 648 | goto unlock_out; |
Jaegeuk Kim | 6fe2bc9 | 2016-01-20 07:31:48 +0800 | [diff] [blame] | 649 | cond_resched(); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 650 | } |
Jaegeuk Kim | e6b120d | 2017-07-10 12:55:09 -0700 | [diff] [blame] | 651 | mutex_unlock(&sbi->extent_tree_lock); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 652 | |
Jaegeuk Kim | 74fd8d9 | 2015-12-21 19:25:50 -0800 | [diff] [blame] | 653 | free_node: |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 654 | /* 2. remove LRU extent entries */ |
Jaegeuk Kim | e6b120d | 2017-07-10 12:55:09 -0700 | [diff] [blame] | 655 | if (!mutex_trylock(&sbi->extent_tree_lock)) |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 656 | goto out; |
| 657 | |
| 658 | remained = nr_shrink - (node_cnt + tree_cnt); |
| 659 | |
| 660 | spin_lock(&sbi->extent_lock); |
Hou Pengyang | 201ef5e | 2016-01-26 12:56:26 +0000 | [diff] [blame] | 661 | for (; remained > 0; remained--) { |
| 662 | if (list_empty(&sbi->extent_list)) |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 663 | break; |
Hou Pengyang | 201ef5e | 2016-01-26 12:56:26 +0000 | [diff] [blame] | 664 | en = list_first_entry(&sbi->extent_list, |
| 665 | struct extent_node, list); |
| 666 | et = en->et; |
| 667 | if (!write_trylock(&et->lock)) { |
| 668 | /* refresh this extent node's position in extent list */ |
| 669 | list_move_tail(&en->list, &sbi->extent_list); |
| 670 | continue; |
| 671 | } |
| 672 | |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 673 | list_del_init(&en->list); |
Hou Pengyang | 201ef5e | 2016-01-26 12:56:26 +0000 | [diff] [blame] | 674 | spin_unlock(&sbi->extent_lock); |
| 675 | |
| 676 | __detach_extent_node(sbi, et, en); |
| 677 | |
| 678 | write_unlock(&et->lock); |
| 679 | node_cnt++; |
| 680 | spin_lock(&sbi->extent_lock); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 681 | } |
| 682 | spin_unlock(&sbi->extent_lock); |
| 683 | |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 684 | unlock_out: |
Jaegeuk Kim | e6b120d | 2017-07-10 12:55:09 -0700 | [diff] [blame] | 685 | mutex_unlock(&sbi->extent_tree_lock); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 686 | out: |
| 687 | trace_f2fs_shrink_extent_tree(sbi, node_cnt, tree_cnt); |
| 688 | |
| 689 | return node_cnt + tree_cnt; |
| 690 | } |
| 691 | |
| 692 | unsigned int f2fs_destroy_extent_node(struct inode *inode) |
| 693 | { |
| 694 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 695 | struct extent_tree *et = F2FS_I(inode)->extent_tree; |
| 696 | unsigned int node_cnt = 0; |
| 697 | |
Chao Yu | 9b72a38 | 2016-01-08 20:24:00 +0800 | [diff] [blame] | 698 | if (!et || !atomic_read(&et->node_cnt)) |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 699 | return 0; |
| 700 | |
| 701 | write_lock(&et->lock); |
Hou Pengyang | 201ef5e | 2016-01-26 12:56:26 +0000 | [diff] [blame] | 702 | node_cnt = __free_extent_tree(sbi, et); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 703 | write_unlock(&et->lock); |
| 704 | |
| 705 | return node_cnt; |
| 706 | } |
| 707 | |
Jaegeuk Kim | 5f281fa | 2016-07-12 11:07:52 -0700 | [diff] [blame] | 708 | void f2fs_drop_extent_tree(struct inode *inode) |
| 709 | { |
| 710 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 711 | struct extent_tree *et = F2FS_I(inode)->extent_tree; |
Zhikang Zhang | 4c3226a | 2018-09-10 16:18:25 +0800 | [diff] [blame] | 712 | bool updated = false; |
Jaegeuk Kim | 5f281fa | 2016-07-12 11:07:52 -0700 | [diff] [blame] | 713 | |
Chao Yu | 6360391 | 2018-01-27 17:29:49 +0800 | [diff] [blame] | 714 | if (!f2fs_may_extent_tree(inode)) |
| 715 | return; |
| 716 | |
Jaegeuk Kim | 5f281fa | 2016-07-12 11:07:52 -0700 | [diff] [blame] | 717 | set_inode_flag(inode, FI_NO_EXTENT); |
| 718 | |
| 719 | write_lock(&et->lock); |
| 720 | __free_extent_tree(sbi, et); |
Zhikang Zhang | 4c3226a | 2018-09-10 16:18:25 +0800 | [diff] [blame] | 721 | if (et->largest.len) { |
| 722 | et->largest.len = 0; |
| 723 | updated = true; |
| 724 | } |
Jaegeuk Kim | 5f281fa | 2016-07-12 11:07:52 -0700 | [diff] [blame] | 725 | write_unlock(&et->lock); |
Zhikang Zhang | 4c3226a | 2018-09-10 16:18:25 +0800 | [diff] [blame] | 726 | if (updated) |
| 727 | f2fs_mark_inode_dirty_sync(inode, true); |
Jaegeuk Kim | 5f281fa | 2016-07-12 11:07:52 -0700 | [diff] [blame] | 728 | } |
| 729 | |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 730 | void f2fs_destroy_extent_tree(struct inode *inode) |
| 731 | { |
| 732 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 733 | struct extent_tree *et = F2FS_I(inode)->extent_tree; |
| 734 | unsigned int node_cnt = 0; |
| 735 | |
| 736 | if (!et) |
| 737 | return; |
| 738 | |
Chao Yu | 68e3538 | 2016-01-08 20:22:52 +0800 | [diff] [blame] | 739 | if (inode->i_nlink && !is_bad_inode(inode) && |
| 740 | atomic_read(&et->node_cnt)) { |
Jaegeuk Kim | e6b120d | 2017-07-10 12:55:09 -0700 | [diff] [blame] | 741 | mutex_lock(&sbi->extent_tree_lock); |
Jaegeuk Kim | 137d09f | 2015-12-31 15:02:16 -0800 | [diff] [blame] | 742 | list_add_tail(&et->list, &sbi->zombie_list); |
Jaegeuk Kim | 74fd8d9 | 2015-12-21 19:25:50 -0800 | [diff] [blame] | 743 | atomic_inc(&sbi->total_zombie_tree); |
Jaegeuk Kim | e6b120d | 2017-07-10 12:55:09 -0700 | [diff] [blame] | 744 | mutex_unlock(&sbi->extent_tree_lock); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 745 | return; |
| 746 | } |
| 747 | |
| 748 | /* free all extent info belong to this extent tree */ |
| 749 | node_cnt = f2fs_destroy_extent_node(inode); |
| 750 | |
| 751 | /* delete extent tree entry in radix tree */ |
Jaegeuk Kim | e6b120d | 2017-07-10 12:55:09 -0700 | [diff] [blame] | 752 | mutex_lock(&sbi->extent_tree_lock); |
Chao Yu | 68e3538 | 2016-01-08 20:22:52 +0800 | [diff] [blame] | 753 | f2fs_bug_on(sbi, atomic_read(&et->node_cnt)); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 754 | radix_tree_delete(&sbi->extent_tree_root, inode->i_ino); |
| 755 | kmem_cache_free(extent_tree_slab, et); |
Jaegeuk Kim | 7441cce | 2015-12-21 19:20:15 -0800 | [diff] [blame] | 756 | atomic_dec(&sbi->total_ext_tree); |
Jaegeuk Kim | e6b120d | 2017-07-10 12:55:09 -0700 | [diff] [blame] | 757 | mutex_unlock(&sbi->extent_tree_lock); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 758 | |
| 759 | F2FS_I(inode)->extent_tree = NULL; |
| 760 | |
| 761 | trace_f2fs_destroy_extent_tree(inode, node_cnt); |
| 762 | } |
| 763 | |
| 764 | bool f2fs_lookup_extent_cache(struct inode *inode, pgoff_t pgofs, |
| 765 | struct extent_info *ei) |
| 766 | { |
| 767 | if (!f2fs_may_extent_tree(inode)) |
| 768 | return false; |
| 769 | |
| 770 | return f2fs_lookup_extent_tree(inode, pgofs, ei); |
| 771 | } |
| 772 | |
| 773 | void f2fs_update_extent_cache(struct dnode_of_data *dn) |
| 774 | { |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 775 | pgoff_t fofs; |
Chao Yu | f28b343 | 2016-02-24 17:16:47 +0800 | [diff] [blame] | 776 | block_t blkaddr; |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 777 | |
| 778 | if (!f2fs_may_extent_tree(dn->inode)) |
| 779 | return; |
| 780 | |
Chao Yu | f28b343 | 2016-02-24 17:16:47 +0800 | [diff] [blame] | 781 | if (dn->data_blkaddr == NEW_ADDR) |
| 782 | blkaddr = NULL_ADDR; |
| 783 | else |
| 784 | blkaddr = dn->data_blkaddr; |
Chao Yu | 19b2c30 | 2015-08-26 20:34:48 +0800 | [diff] [blame] | 785 | |
Chao Yu | 6b4d6a8 | 2018-05-30 00:20:41 +0800 | [diff] [blame] | 786 | fofs = f2fs_start_bidx_of_node(ofs_of_node(dn->node_page), dn->inode) + |
Chao Yu | 81ca735 | 2016-01-26 15:39:35 +0800 | [diff] [blame] | 787 | dn->ofs_in_node; |
Jaegeuk Kim | ee6d182 | 2016-05-20 16:32:49 -0700 | [diff] [blame] | 788 | f2fs_update_extent_tree_range(dn->inode, fofs, blkaddr, 1); |
Chao Yu | 19b2c30 | 2015-08-26 20:34:48 +0800 | [diff] [blame] | 789 | } |
| 790 | |
| 791 | void f2fs_update_extent_cache_range(struct dnode_of_data *dn, |
| 792 | pgoff_t fofs, block_t blkaddr, unsigned int len) |
| 793 | |
| 794 | { |
| 795 | if (!f2fs_may_extent_tree(dn->inode)) |
| 796 | return; |
| 797 | |
Jaegeuk Kim | ee6d182 | 2016-05-20 16:32:49 -0700 | [diff] [blame] | 798 | f2fs_update_extent_tree_range(dn->inode, fofs, blkaddr, len); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 799 | } |
| 800 | |
Chao Yu | 6b4d6a8 | 2018-05-30 00:20:41 +0800 | [diff] [blame] | 801 | void f2fs_init_extent_cache_info(struct f2fs_sb_info *sbi) |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 802 | { |
| 803 | INIT_RADIX_TREE(&sbi->extent_tree_root, GFP_NOIO); |
Jaegeuk Kim | e6b120d | 2017-07-10 12:55:09 -0700 | [diff] [blame] | 804 | mutex_init(&sbi->extent_tree_lock); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 805 | INIT_LIST_HEAD(&sbi->extent_list); |
| 806 | spin_lock_init(&sbi->extent_lock); |
Jaegeuk Kim | 7441cce | 2015-12-21 19:20:15 -0800 | [diff] [blame] | 807 | atomic_set(&sbi->total_ext_tree, 0); |
Jaegeuk Kim | 137d09f | 2015-12-31 15:02:16 -0800 | [diff] [blame] | 808 | INIT_LIST_HEAD(&sbi->zombie_list); |
Jaegeuk Kim | 74fd8d9 | 2015-12-21 19:25:50 -0800 | [diff] [blame] | 809 | atomic_set(&sbi->total_zombie_tree, 0); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 810 | atomic_set(&sbi->total_ext_node, 0); |
| 811 | } |
| 812 | |
Chao Yu | 6b4d6a8 | 2018-05-30 00:20:41 +0800 | [diff] [blame] | 813 | int __init f2fs_create_extent_cache(void) |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 814 | { |
| 815 | extent_tree_slab = f2fs_kmem_cache_create("f2fs_extent_tree", |
| 816 | sizeof(struct extent_tree)); |
| 817 | if (!extent_tree_slab) |
| 818 | return -ENOMEM; |
| 819 | extent_node_slab = f2fs_kmem_cache_create("f2fs_extent_node", |
| 820 | sizeof(struct extent_node)); |
| 821 | if (!extent_node_slab) { |
| 822 | kmem_cache_destroy(extent_tree_slab); |
| 823 | return -ENOMEM; |
| 824 | } |
| 825 | return 0; |
| 826 | } |
| 827 | |
Chao Yu | 6b4d6a8 | 2018-05-30 00:20:41 +0800 | [diff] [blame] | 828 | void f2fs_destroy_extent_cache(void) |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 829 | { |
| 830 | kmem_cache_destroy(extent_node_slab); |
| 831 | kmem_cache_destroy(extent_tree_slab); |
| 832 | } |