Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 1 | /* |
| 2 | * f2fs extent cache support |
| 3 | * |
| 4 | * Copyright (c) 2015 Motorola Mobility |
| 5 | * Copyright (c) 2015 Samsung Electronics |
| 6 | * Authors: Jaegeuk Kim <jaegeuk@kernel.org> |
| 7 | * Chao Yu <chao2.yu@samsung.com> |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License version 2 as |
| 11 | * published by the Free Software Foundation. |
| 12 | */ |
| 13 | |
| 14 | #include <linux/fs.h> |
| 15 | #include <linux/f2fs_fs.h> |
| 16 | |
| 17 | #include "f2fs.h" |
| 18 | #include "node.h" |
| 19 | #include <trace/events/f2fs.h> |
| 20 | |
| 21 | static struct kmem_cache *extent_tree_slab; |
| 22 | static struct kmem_cache *extent_node_slab; |
| 23 | |
| 24 | static struct extent_node *__attach_extent_node(struct f2fs_sb_info *sbi, |
| 25 | struct extent_tree *et, struct extent_info *ei, |
| 26 | struct rb_node *parent, struct rb_node **p) |
| 27 | { |
| 28 | struct extent_node *en; |
| 29 | |
| 30 | en = kmem_cache_alloc(extent_node_slab, GFP_ATOMIC); |
| 31 | if (!en) |
| 32 | return NULL; |
| 33 | |
| 34 | en->ei = *ei; |
| 35 | INIT_LIST_HEAD(&en->list); |
Hou Pengyang | 201ef5e | 2016-01-26 12:56:26 +0000 | [diff] [blame] | 36 | en->et = et; |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 37 | |
| 38 | rb_link_node(&en->rb_node, parent, p); |
| 39 | rb_insert_color(&en->rb_node, &et->root); |
Chao Yu | 68e3538 | 2016-01-08 20:22:52 +0800 | [diff] [blame] | 40 | atomic_inc(&et->node_cnt); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 41 | atomic_inc(&sbi->total_ext_node); |
| 42 | return en; |
| 43 | } |
| 44 | |
| 45 | static void __detach_extent_node(struct f2fs_sb_info *sbi, |
| 46 | struct extent_tree *et, struct extent_node *en) |
| 47 | { |
| 48 | rb_erase(&en->rb_node, &et->root); |
Chao Yu | 68e3538 | 2016-01-08 20:22:52 +0800 | [diff] [blame] | 49 | atomic_dec(&et->node_cnt); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 50 | atomic_dec(&sbi->total_ext_node); |
| 51 | |
| 52 | if (et->cached_en == en) |
| 53 | et->cached_en = NULL; |
Hou Pengyang | a03f01f | 2016-01-26 12:56:25 +0000 | [diff] [blame] | 54 | kmem_cache_free(extent_node_slab, en); |
| 55 | } |
| 56 | |
| 57 | /* |
| 58 | * Flow to release an extent_node: |
| 59 | * 1. list_del_init |
| 60 | * 2. __detach_extent_node |
| 61 | * 3. kmem_cache_free. |
| 62 | */ |
| 63 | static void __release_extent_node(struct f2fs_sb_info *sbi, |
| 64 | struct extent_tree *et, struct extent_node *en) |
| 65 | { |
| 66 | spin_lock(&sbi->extent_lock); |
Hou Pengyang | 201ef5e | 2016-01-26 12:56:26 +0000 | [diff] [blame] | 67 | f2fs_bug_on(sbi, list_empty(&en->list)); |
| 68 | list_del_init(&en->list); |
Hou Pengyang | a03f01f | 2016-01-26 12:56:25 +0000 | [diff] [blame] | 69 | spin_unlock(&sbi->extent_lock); |
| 70 | |
| 71 | __detach_extent_node(sbi, et, en); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 72 | } |
| 73 | |
| 74 | static struct extent_tree *__grab_extent_tree(struct inode *inode) |
| 75 | { |
| 76 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 77 | struct extent_tree *et; |
| 78 | nid_t ino = inode->i_ino; |
| 79 | |
| 80 | down_write(&sbi->extent_tree_lock); |
| 81 | et = radix_tree_lookup(&sbi->extent_tree_root, ino); |
| 82 | if (!et) { |
| 83 | et = f2fs_kmem_cache_alloc(extent_tree_slab, GFP_NOFS); |
| 84 | f2fs_radix_tree_insert(&sbi->extent_tree_root, ino, et); |
| 85 | memset(et, 0, sizeof(struct extent_tree)); |
| 86 | et->ino = ino; |
| 87 | et->root = RB_ROOT; |
| 88 | et->cached_en = NULL; |
| 89 | rwlock_init(&et->lock); |
Jaegeuk Kim | 137d09f | 2015-12-31 15:02:16 -0800 | [diff] [blame] | 90 | INIT_LIST_HEAD(&et->list); |
Chao Yu | 68e3538 | 2016-01-08 20:22:52 +0800 | [diff] [blame] | 91 | atomic_set(&et->node_cnt, 0); |
Jaegeuk Kim | 7441cce | 2015-12-21 19:20:15 -0800 | [diff] [blame] | 92 | atomic_inc(&sbi->total_ext_tree); |
Jaegeuk Kim | 74fd8d9 | 2015-12-21 19:25:50 -0800 | [diff] [blame] | 93 | } else { |
| 94 | atomic_dec(&sbi->total_zombie_tree); |
Jaegeuk Kim | 137d09f | 2015-12-31 15:02:16 -0800 | [diff] [blame] | 95 | list_del_init(&et->list); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 96 | } |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 97 | up_write(&sbi->extent_tree_lock); |
| 98 | |
| 99 | /* never died until evict_inode */ |
| 100 | F2FS_I(inode)->extent_tree = et; |
| 101 | |
| 102 | return et; |
| 103 | } |
| 104 | |
Chao Yu | 91c481f | 2015-08-19 19:12:20 +0800 | [diff] [blame] | 105 | static struct extent_node *__lookup_extent_tree(struct f2fs_sb_info *sbi, |
| 106 | struct extent_tree *et, unsigned int fofs) |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 107 | { |
| 108 | struct rb_node *node = et->root.rb_node; |
Fan Li | f8b703d | 2015-08-18 17:13:13 +0800 | [diff] [blame] | 109 | struct extent_node *en = et->cached_en; |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 110 | |
Fan Li | f8b703d | 2015-08-18 17:13:13 +0800 | [diff] [blame] | 111 | if (en) { |
| 112 | struct extent_info *cei = &en->ei; |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 113 | |
Chao Yu | 91c481f | 2015-08-19 19:12:20 +0800 | [diff] [blame] | 114 | if (cei->fofs <= fofs && cei->fofs + cei->len > fofs) { |
| 115 | stat_inc_cached_node_hit(sbi); |
Fan Li | f8b703d | 2015-08-18 17:13:13 +0800 | [diff] [blame] | 116 | return en; |
Chao Yu | 91c481f | 2015-08-19 19:12:20 +0800 | [diff] [blame] | 117 | } |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 118 | } |
| 119 | |
| 120 | while (node) { |
| 121 | en = rb_entry(node, struct extent_node, rb_node); |
| 122 | |
Chao Yu | 029e13c | 2015-08-19 19:13:25 +0800 | [diff] [blame] | 123 | if (fofs < en->ei.fofs) { |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 124 | node = node->rb_left; |
Chao Yu | 029e13c | 2015-08-19 19:13:25 +0800 | [diff] [blame] | 125 | } else if (fofs >= en->ei.fofs + en->ei.len) { |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 126 | node = node->rb_right; |
Chao Yu | 029e13c | 2015-08-19 19:13:25 +0800 | [diff] [blame] | 127 | } else { |
| 128 | stat_inc_rbtree_node_hit(sbi); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 129 | return en; |
Chao Yu | 029e13c | 2015-08-19 19:13:25 +0800 | [diff] [blame] | 130 | } |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 131 | } |
| 132 | return NULL; |
| 133 | } |
| 134 | |
Chao Yu | a6f7834 | 2015-08-19 19:14:15 +0800 | [diff] [blame] | 135 | static struct extent_node *__init_extent_tree(struct f2fs_sb_info *sbi, |
| 136 | struct extent_tree *et, struct extent_info *ei) |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 137 | { |
| 138 | struct rb_node **p = &et->root.rb_node; |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 139 | struct extent_node *en; |
| 140 | |
Chao Yu | a6f7834 | 2015-08-19 19:14:15 +0800 | [diff] [blame] | 141 | en = __attach_extent_node(sbi, et, ei, NULL, p); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 142 | if (!en) |
| 143 | return NULL; |
Chao Yu | a6f7834 | 2015-08-19 19:14:15 +0800 | [diff] [blame] | 144 | |
| 145 | et->largest = en->ei; |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 146 | et->cached_en = en; |
| 147 | return en; |
| 148 | } |
| 149 | |
| 150 | static unsigned int __free_extent_tree(struct f2fs_sb_info *sbi, |
Hou Pengyang | 201ef5e | 2016-01-26 12:56:26 +0000 | [diff] [blame] | 151 | struct extent_tree *et) |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 152 | { |
| 153 | struct rb_node *node, *next; |
| 154 | struct extent_node *en; |
Chao Yu | 68e3538 | 2016-01-08 20:22:52 +0800 | [diff] [blame] | 155 | unsigned int count = atomic_read(&et->node_cnt); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 156 | |
| 157 | node = rb_first(&et->root); |
| 158 | while (node) { |
| 159 | next = rb_next(node); |
| 160 | en = rb_entry(node, struct extent_node, rb_node); |
Hou Pengyang | 201ef5e | 2016-01-26 12:56:26 +0000 | [diff] [blame] | 161 | __release_extent_node(sbi, et, en); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 162 | node = next; |
| 163 | } |
| 164 | |
Chao Yu | 68e3538 | 2016-01-08 20:22:52 +0800 | [diff] [blame] | 165 | return count - atomic_read(&et->node_cnt); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 166 | } |
| 167 | |
Fan Li | 41a099d | 2015-09-17 18:24:17 +0800 | [diff] [blame] | 168 | static void __drop_largest_extent(struct inode *inode, |
| 169 | pgoff_t fofs, unsigned int len) |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 170 | { |
| 171 | struct extent_info *largest = &F2FS_I(inode)->extent_tree->largest; |
| 172 | |
Jaegeuk Kim | 205b982 | 2016-05-20 09:52:20 -0700 | [diff] [blame] | 173 | if (fofs < largest->fofs + largest->len && fofs + len > largest->fofs) { |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 174 | largest->len = 0; |
Jaegeuk Kim | b56ab83 | 2016-06-30 19:09:37 -0700 | [diff] [blame] | 175 | f2fs_mark_inode_dirty_sync(inode); |
Jaegeuk Kim | 205b982 | 2016-05-20 09:52:20 -0700 | [diff] [blame] | 176 | } |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 177 | } |
| 178 | |
Jaegeuk Kim | ed3d125 | 2015-12-28 11:39:06 -0800 | [diff] [blame] | 179 | /* return true, if inode page is changed */ |
Yunlei He | 4a97b2d | 2017-05-19 15:06:12 +0800 | [diff] [blame] | 180 | 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] | 181 | { |
| 182 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 183 | struct extent_tree *et; |
| 184 | struct extent_node *en; |
| 185 | struct extent_info ei; |
| 186 | |
Jaegeuk Kim | ed3d125 | 2015-12-28 11:39:06 -0800 | [diff] [blame] | 187 | if (!f2fs_may_extent_tree(inode)) { |
| 188 | /* drop largest extent */ |
| 189 | if (i_ext && i_ext->len) { |
| 190 | i_ext->len = 0; |
| 191 | return true; |
| 192 | } |
| 193 | return false; |
| 194 | } |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 195 | |
| 196 | et = __grab_extent_tree(inode); |
| 197 | |
Jaegeuk Kim | ed3d125 | 2015-12-28 11:39:06 -0800 | [diff] [blame] | 198 | if (!i_ext || !i_ext->len) |
| 199 | return false; |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 200 | |
Chao Yu | bd933d4 | 2016-05-04 23:19:47 +0800 | [diff] [blame] | 201 | get_extent_info(&ei, i_ext); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 202 | |
| 203 | write_lock(&et->lock); |
Chao Yu | 68e3538 | 2016-01-08 20:22:52 +0800 | [diff] [blame] | 204 | if (atomic_read(&et->node_cnt)) |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 205 | goto out; |
| 206 | |
Chao Yu | a6f7834 | 2015-08-19 19:14:15 +0800 | [diff] [blame] | 207 | en = __init_extent_tree(sbi, et, &ei); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 208 | if (en) { |
| 209 | spin_lock(&sbi->extent_lock); |
| 210 | list_add_tail(&en->list, &sbi->extent_list); |
| 211 | spin_unlock(&sbi->extent_lock); |
| 212 | } |
| 213 | out: |
| 214 | write_unlock(&et->lock); |
Jaegeuk Kim | ed3d125 | 2015-12-28 11:39:06 -0800 | [diff] [blame] | 215 | return false; |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 216 | } |
| 217 | |
Yunlei He | 4a97b2d | 2017-05-19 15:06:12 +0800 | [diff] [blame] | 218 | bool f2fs_init_extent_tree(struct inode *inode, struct f2fs_extent *i_ext) |
| 219 | { |
| 220 | bool ret = __f2fs_init_extent_tree(inode, i_ext); |
| 221 | |
| 222 | if (!F2FS_I(inode)->extent_tree) |
| 223 | set_inode_flag(inode, FI_NO_EXTENT); |
| 224 | |
| 225 | return ret; |
| 226 | } |
| 227 | |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 228 | static bool f2fs_lookup_extent_tree(struct inode *inode, pgoff_t pgofs, |
| 229 | struct extent_info *ei) |
| 230 | { |
| 231 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 232 | struct extent_tree *et = F2FS_I(inode)->extent_tree; |
| 233 | struct extent_node *en; |
| 234 | bool ret = false; |
| 235 | |
| 236 | f2fs_bug_on(sbi, !et); |
| 237 | |
| 238 | trace_f2fs_lookup_extent_tree_start(inode, pgofs); |
| 239 | |
| 240 | read_lock(&et->lock); |
| 241 | |
| 242 | if (et->largest.fofs <= pgofs && |
| 243 | et->largest.fofs + et->largest.len > pgofs) { |
| 244 | *ei = et->largest; |
| 245 | ret = true; |
Chao Yu | 91c481f | 2015-08-19 19:12:20 +0800 | [diff] [blame] | 246 | stat_inc_largest_node_hit(sbi); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 247 | goto out; |
| 248 | } |
| 249 | |
Chao Yu | 91c481f | 2015-08-19 19:12:20 +0800 | [diff] [blame] | 250 | en = __lookup_extent_tree(sbi, et, pgofs); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 251 | if (en) { |
| 252 | *ei = en->ei; |
| 253 | spin_lock(&sbi->extent_lock); |
Jaegeuk Kim | 4292674 | 2016-01-26 09:20:05 -0800 | [diff] [blame] | 254 | if (!list_empty(&en->list)) { |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 255 | list_move_tail(&en->list, &sbi->extent_list); |
Jaegeuk Kim | 4292674 | 2016-01-26 09:20:05 -0800 | [diff] [blame] | 256 | et->cached_en = en; |
| 257 | } |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 258 | spin_unlock(&sbi->extent_lock); |
| 259 | ret = true; |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 260 | } |
| 261 | out: |
Chao Yu | 727edac | 2015-07-15 17:29:49 +0800 | [diff] [blame] | 262 | stat_inc_total_hit(sbi); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 263 | read_unlock(&et->lock); |
| 264 | |
| 265 | trace_f2fs_lookup_extent_tree_end(inode, pgofs, ei); |
| 266 | return ret; |
| 267 | } |
| 268 | |
Fan Li | 0f825ee | 2015-07-15 18:05:17 +0800 | [diff] [blame] | 269 | |
| 270 | /* |
| 271 | * lookup extent at @fofs, if hit, return the extent |
| 272 | * if not, return NULL and |
| 273 | * @prev_ex: extent before fofs |
| 274 | * @next_ex: extent after fofs |
| 275 | * @insert_p: insert point for new extent at fofs |
| 276 | * in order to simpfy the insertion after. |
| 277 | * tree must stay unchanged between lookup and insertion. |
| 278 | */ |
| 279 | static struct extent_node *__lookup_extent_tree_ret(struct extent_tree *et, |
Chao Yu | 91c481f | 2015-08-19 19:12:20 +0800 | [diff] [blame] | 280 | unsigned int fofs, |
| 281 | struct extent_node **prev_ex, |
Fan Li | 0f825ee | 2015-07-15 18:05:17 +0800 | [diff] [blame] | 282 | struct extent_node **next_ex, |
| 283 | struct rb_node ***insert_p, |
| 284 | struct rb_node **insert_parent) |
| 285 | { |
| 286 | struct rb_node **pnode = &et->root.rb_node; |
| 287 | struct rb_node *parent = NULL, *tmp_node; |
Chao Yu | dac2dde | 2015-08-19 19:16:09 +0800 | [diff] [blame] | 288 | struct extent_node *en = et->cached_en; |
Fan Li | 0f825ee | 2015-07-15 18:05:17 +0800 | [diff] [blame] | 289 | |
Chao Yu | dac2dde | 2015-08-19 19:16:09 +0800 | [diff] [blame] | 290 | *insert_p = NULL; |
| 291 | *insert_parent = NULL; |
| 292 | *prev_ex = NULL; |
| 293 | *next_ex = NULL; |
| 294 | |
| 295 | if (RB_EMPTY_ROOT(&et->root)) |
| 296 | return NULL; |
| 297 | |
| 298 | if (en) { |
| 299 | struct extent_info *cei = &en->ei; |
Fan Li | 0f825ee | 2015-07-15 18:05:17 +0800 | [diff] [blame] | 300 | |
| 301 | if (cei->fofs <= fofs && cei->fofs + cei->len > fofs) |
Chao Yu | dac2dde | 2015-08-19 19:16:09 +0800 | [diff] [blame] | 302 | goto lookup_neighbors; |
Fan Li | 0f825ee | 2015-07-15 18:05:17 +0800 | [diff] [blame] | 303 | } |
| 304 | |
| 305 | while (*pnode) { |
| 306 | parent = *pnode; |
| 307 | en = rb_entry(*pnode, struct extent_node, rb_node); |
| 308 | |
| 309 | if (fofs < en->ei.fofs) |
| 310 | pnode = &(*pnode)->rb_left; |
| 311 | else if (fofs >= en->ei.fofs + en->ei.len) |
| 312 | pnode = &(*pnode)->rb_right; |
| 313 | else |
Chao Yu | dac2dde | 2015-08-19 19:16:09 +0800 | [diff] [blame] | 314 | goto lookup_neighbors; |
Fan Li | 0f825ee | 2015-07-15 18:05:17 +0800 | [diff] [blame] | 315 | } |
| 316 | |
| 317 | *insert_p = pnode; |
| 318 | *insert_parent = parent; |
| 319 | |
| 320 | en = rb_entry(parent, struct extent_node, rb_node); |
| 321 | tmp_node = parent; |
| 322 | if (parent && fofs > en->ei.fofs) |
| 323 | tmp_node = rb_next(parent); |
| 324 | *next_ex = tmp_node ? |
| 325 | rb_entry(tmp_node, struct extent_node, rb_node) : NULL; |
| 326 | |
| 327 | tmp_node = parent; |
| 328 | if (parent && fofs < en->ei.fofs) |
| 329 | tmp_node = rb_prev(parent); |
| 330 | *prev_ex = tmp_node ? |
| 331 | rb_entry(tmp_node, struct extent_node, rb_node) : NULL; |
Fan Li | 0f825ee | 2015-07-15 18:05:17 +0800 | [diff] [blame] | 332 | return NULL; |
Chao Yu | dac2dde | 2015-08-19 19:16:09 +0800 | [diff] [blame] | 333 | |
| 334 | lookup_neighbors: |
| 335 | if (fofs == en->ei.fofs) { |
| 336 | /* lookup prev node for merging backward later */ |
| 337 | tmp_node = rb_prev(&en->rb_node); |
| 338 | *prev_ex = tmp_node ? |
| 339 | rb_entry(tmp_node, struct extent_node, rb_node) : NULL; |
| 340 | } |
| 341 | if (fofs == en->ei.fofs + en->ei.len - 1) { |
| 342 | /* lookup next node for merging frontward later */ |
| 343 | tmp_node = rb_next(&en->rb_node); |
| 344 | *next_ex = tmp_node ? |
| 345 | rb_entry(tmp_node, struct extent_node, rb_node) : NULL; |
| 346 | } |
| 347 | return en; |
Fan Li | 0f825ee | 2015-07-15 18:05:17 +0800 | [diff] [blame] | 348 | } |
| 349 | |
Jaegeuk Kim | 205b982 | 2016-05-20 09:52:20 -0700 | [diff] [blame] | 350 | static struct extent_node *__try_merge_extent_node(struct inode *inode, |
Fan Li | 0f825ee | 2015-07-15 18:05:17 +0800 | [diff] [blame] | 351 | struct extent_tree *et, struct extent_info *ei, |
Fan Li | 0f825ee | 2015-07-15 18:05:17 +0800 | [diff] [blame] | 352 | struct extent_node *prev_ex, |
Chao Yu | ef05e22 | 2015-08-19 19:15:09 +0800 | [diff] [blame] | 353 | struct extent_node *next_ex) |
Fan Li | 0f825ee | 2015-07-15 18:05:17 +0800 | [diff] [blame] | 354 | { |
Jaegeuk Kim | 205b982 | 2016-05-20 09:52:20 -0700 | [diff] [blame] | 355 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
Fan Li | 0f825ee | 2015-07-15 18:05:17 +0800 | [diff] [blame] | 356 | struct extent_node *en = NULL; |
Fan Li | 0f825ee | 2015-07-15 18:05:17 +0800 | [diff] [blame] | 357 | |
| 358 | if (prev_ex && __is_back_mergeable(ei, &prev_ex->ei)) { |
Fan Li | 0f825ee | 2015-07-15 18:05:17 +0800 | [diff] [blame] | 359 | prev_ex->ei.len += ei->len; |
| 360 | ei = &prev_ex->ei; |
| 361 | en = prev_ex; |
| 362 | } |
Chao Yu | ef05e22 | 2015-08-19 19:15:09 +0800 | [diff] [blame] | 363 | |
Fan Li | 0f825ee | 2015-07-15 18:05:17 +0800 | [diff] [blame] | 364 | if (next_ex && __is_front_mergeable(ei, &next_ex->ei)) { |
Fan Li | 0f825ee | 2015-07-15 18:05:17 +0800 | [diff] [blame] | 365 | next_ex->ei.fofs = ei->fofs; |
| 366 | next_ex->ei.blk = ei->blk; |
| 367 | next_ex->ei.len += ei->len; |
Yunlei He | ec160ad | 2016-12-19 20:10:48 +0800 | [diff] [blame] | 368 | if (en) |
| 369 | __release_extent_node(sbi, et, prev_ex); |
| 370 | |
Fan Li | 0f825ee | 2015-07-15 18:05:17 +0800 | [diff] [blame] | 371 | en = next_ex; |
| 372 | } |
Chao Yu | ef05e22 | 2015-08-19 19:15:09 +0800 | [diff] [blame] | 373 | |
Jaegeuk Kim | 43a2fa1 | 2016-01-26 09:12:50 -0800 | [diff] [blame] | 374 | if (!en) |
| 375 | return NULL; |
| 376 | |
Jaegeuk Kim | 205b982 | 2016-05-20 09:52:20 -0700 | [diff] [blame] | 377 | __try_update_largest_extent(inode, et, en); |
Jaegeuk Kim | 43a2fa1 | 2016-01-26 09:12:50 -0800 | [diff] [blame] | 378 | |
| 379 | spin_lock(&sbi->extent_lock); |
Jaegeuk Kim | 4292674 | 2016-01-26 09:20:05 -0800 | [diff] [blame] | 380 | if (!list_empty(&en->list)) { |
Jaegeuk Kim | 43a2fa1 | 2016-01-26 09:12:50 -0800 | [diff] [blame] | 381 | list_move_tail(&en->list, &sbi->extent_list); |
Jaegeuk Kim | 4292674 | 2016-01-26 09:20:05 -0800 | [diff] [blame] | 382 | et->cached_en = en; |
| 383 | } |
Jaegeuk Kim | 43a2fa1 | 2016-01-26 09:12:50 -0800 | [diff] [blame] | 384 | spin_unlock(&sbi->extent_lock); |
Chao Yu | ef05e22 | 2015-08-19 19:15:09 +0800 | [diff] [blame] | 385 | return en; |
| 386 | } |
| 387 | |
Jaegeuk Kim | 205b982 | 2016-05-20 09:52:20 -0700 | [diff] [blame] | 388 | static struct extent_node *__insert_extent_tree(struct inode *inode, |
Chao Yu | ef05e22 | 2015-08-19 19:15:09 +0800 | [diff] [blame] | 389 | struct extent_tree *et, struct extent_info *ei, |
| 390 | struct rb_node **insert_p, |
| 391 | struct rb_node *insert_parent) |
| 392 | { |
Jaegeuk Kim | 205b982 | 2016-05-20 09:52:20 -0700 | [diff] [blame] | 393 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
Chao Yu | ef05e22 | 2015-08-19 19:15:09 +0800 | [diff] [blame] | 394 | struct rb_node **p = &et->root.rb_node; |
| 395 | struct rb_node *parent = NULL; |
| 396 | struct extent_node *en = NULL; |
Fan Li | 0f825ee | 2015-07-15 18:05:17 +0800 | [diff] [blame] | 397 | |
| 398 | if (insert_p && insert_parent) { |
| 399 | parent = insert_parent; |
| 400 | p = insert_p; |
| 401 | goto do_insert; |
| 402 | } |
| 403 | |
| 404 | while (*p) { |
| 405 | parent = *p; |
| 406 | en = rb_entry(parent, struct extent_node, rb_node); |
| 407 | |
| 408 | if (ei->fofs < en->ei.fofs) |
| 409 | p = &(*p)->rb_left; |
| 410 | else if (ei->fofs >= en->ei.fofs + en->ei.len) |
| 411 | p = &(*p)->rb_right; |
| 412 | else |
| 413 | f2fs_bug_on(sbi, 1); |
| 414 | } |
| 415 | do_insert: |
| 416 | en = __attach_extent_node(sbi, et, ei, parent, p); |
| 417 | if (!en) |
| 418 | return NULL; |
Chao Yu | ef05e22 | 2015-08-19 19:15:09 +0800 | [diff] [blame] | 419 | |
Jaegeuk Kim | 205b982 | 2016-05-20 09:52:20 -0700 | [diff] [blame] | 420 | __try_update_largest_extent(inode, et, en); |
Jaegeuk Kim | 43a2fa1 | 2016-01-26 09:12:50 -0800 | [diff] [blame] | 421 | |
| 422 | /* update in global extent list */ |
| 423 | spin_lock(&sbi->extent_lock); |
| 424 | list_add_tail(&en->list, &sbi->extent_list); |
Jaegeuk Kim | 4292674 | 2016-01-26 09:20:05 -0800 | [diff] [blame] | 425 | et->cached_en = en; |
Jaegeuk Kim | 43a2fa1 | 2016-01-26 09:12:50 -0800 | [diff] [blame] | 426 | spin_unlock(&sbi->extent_lock); |
Fan Li | 0f825ee | 2015-07-15 18:05:17 +0800 | [diff] [blame] | 427 | return en; |
| 428 | } |
| 429 | |
Jaegeuk Kim | 514053e | 2015-09-15 14:46:43 -0700 | [diff] [blame] | 430 | static unsigned int f2fs_update_extent_tree_range(struct inode *inode, |
Chao Yu | 19b2c30 | 2015-08-26 20:34:48 +0800 | [diff] [blame] | 431 | pgoff_t fofs, block_t blkaddr, unsigned int len) |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 432 | { |
| 433 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 434 | struct extent_tree *et = F2FS_I(inode)->extent_tree; |
Fan Li | 4d1fa81 | 2015-09-17 18:42:06 +0800 | [diff] [blame] | 435 | struct extent_node *en = NULL, *en1 = NULL; |
Chao Yu | 19b2c30 | 2015-08-26 20:34:48 +0800 | [diff] [blame] | 436 | struct extent_node *prev_en = NULL, *next_en = NULL; |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 437 | struct extent_info ei, dei, prev; |
Fan Li | 0f825ee | 2015-07-15 18:05:17 +0800 | [diff] [blame] | 438 | struct rb_node **insert_p = NULL, *insert_parent = NULL; |
Chao Yu | 19b2c30 | 2015-08-26 20:34:48 +0800 | [diff] [blame] | 439 | unsigned int end = fofs + len; |
| 440 | unsigned int pos = (unsigned int)fofs; |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 441 | |
| 442 | if (!et) |
| 443 | return false; |
| 444 | |
Chao Yu | 744288c | 2015-09-06 17:50:13 +0800 | [diff] [blame] | 445 | trace_f2fs_update_extent_tree_range(inode, fofs, blkaddr, len); |
| 446 | |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 447 | write_lock(&et->lock); |
| 448 | |
Jaegeuk Kim | 9194232 | 2016-05-20 10:13:22 -0700 | [diff] [blame] | 449 | if (is_inode_flag_set(inode, FI_NO_EXTENT)) { |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 450 | write_unlock(&et->lock); |
| 451 | return false; |
| 452 | } |
| 453 | |
| 454 | prev = et->largest; |
| 455 | dei.len = 0; |
| 456 | |
Fan Li | 4d1fa81 | 2015-09-17 18:42:06 +0800 | [diff] [blame] | 457 | /* |
| 458 | * drop largest extent before lookup, in case it's already |
| 459 | * been shrunk from extent tree |
| 460 | */ |
Fan Li | 41a099d | 2015-09-17 18:24:17 +0800 | [diff] [blame] | 461 | __drop_largest_extent(inode, fofs, len); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 462 | |
Chao Yu | 19b2c30 | 2015-08-26 20:34:48 +0800 | [diff] [blame] | 463 | /* 1. lookup first extent node in range [fofs, fofs + len - 1] */ |
| 464 | en = __lookup_extent_tree_ret(et, fofs, &prev_en, &next_en, |
Fan Li | 0f825ee | 2015-07-15 18:05:17 +0800 | [diff] [blame] | 465 | &insert_p, &insert_parent); |
Fan Li | 4d1fa81 | 2015-09-17 18:42:06 +0800 | [diff] [blame] | 466 | if (!en) |
| 467 | en = next_en; |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 468 | |
Chao Yu | 19b2c30 | 2015-08-26 20:34:48 +0800 | [diff] [blame] | 469 | /* 2. invlidate all extent nodes in range [fofs, fofs + len - 1] */ |
Fan Li | 4d1fa81 | 2015-09-17 18:42:06 +0800 | [diff] [blame] | 470 | while (en && en->ei.fofs < end) { |
| 471 | unsigned int org_end; |
| 472 | int parts = 0; /* # of parts current extent split into */ |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 473 | |
Fan Li | 4d1fa81 | 2015-09-17 18:42:06 +0800 | [diff] [blame] | 474 | next_en = en1 = NULL; |
Chao Yu | 19b2c30 | 2015-08-26 20:34:48 +0800 | [diff] [blame] | 475 | |
| 476 | dei = en->ei; |
Fan Li | 4d1fa81 | 2015-09-17 18:42:06 +0800 | [diff] [blame] | 477 | org_end = dei.fofs + dei.len; |
| 478 | f2fs_bug_on(sbi, pos >= org_end); |
Chao Yu | 19b2c30 | 2015-08-26 20:34:48 +0800 | [diff] [blame] | 479 | |
Fan Li | 4d1fa81 | 2015-09-17 18:42:06 +0800 | [diff] [blame] | 480 | if (pos > dei.fofs && pos - dei.fofs >= F2FS_MIN_EXTENT_LEN) { |
| 481 | en->ei.len = pos - en->ei.fofs; |
| 482 | prev_en = en; |
| 483 | parts = 1; |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 484 | } |
| 485 | |
Fan Li | 4d1fa81 | 2015-09-17 18:42:06 +0800 | [diff] [blame] | 486 | if (end < org_end && org_end - end >= F2FS_MIN_EXTENT_LEN) { |
| 487 | if (parts) { |
Chao Yu | 19b2c30 | 2015-08-26 20:34:48 +0800 | [diff] [blame] | 488 | set_extent_info(&ei, end, |
| 489 | end - dei.fofs + dei.blk, |
Fan Li | 4d1fa81 | 2015-09-17 18:42:06 +0800 | [diff] [blame] | 490 | org_end - end); |
Jaegeuk Kim | 205b982 | 2016-05-20 09:52:20 -0700 | [diff] [blame] | 491 | en1 = __insert_extent_tree(inode, et, &ei, |
Fan Li | 4d1fa81 | 2015-09-17 18:42:06 +0800 | [diff] [blame] | 492 | NULL, NULL); |
| 493 | next_en = en1; |
| 494 | } else { |
| 495 | en->ei.fofs = end; |
| 496 | en->ei.blk += end - dei.fofs; |
| 497 | en->ei.len -= end - dei.fofs; |
| 498 | next_en = en; |
Chao Yu | 19b2c30 | 2015-08-26 20:34:48 +0800 | [diff] [blame] | 499 | } |
Fan Li | 4d1fa81 | 2015-09-17 18:42:06 +0800 | [diff] [blame] | 500 | parts++; |
Chao Yu | 19b2c30 | 2015-08-26 20:34:48 +0800 | [diff] [blame] | 501 | } |
Fan Li | 4d1fa81 | 2015-09-17 18:42:06 +0800 | [diff] [blame] | 502 | |
| 503 | if (!next_en) { |
| 504 | struct rb_node *node = rb_next(&en->rb_node); |
| 505 | |
| 506 | next_en = node ? |
| 507 | rb_entry(node, struct extent_node, rb_node) |
| 508 | : NULL; |
| 509 | } |
| 510 | |
Chao Yu | 4abd3f5 | 2015-09-22 21:07:47 +0800 | [diff] [blame] | 511 | if (parts) |
Jaegeuk Kim | 205b982 | 2016-05-20 09:52:20 -0700 | [diff] [blame] | 512 | __try_update_largest_extent(inode, et, en); |
Chao Yu | 4abd3f5 | 2015-09-22 21:07:47 +0800 | [diff] [blame] | 513 | else |
Hou Pengyang | a03f01f | 2016-01-26 12:56:25 +0000 | [diff] [blame] | 514 | __release_extent_node(sbi, et, en); |
Fan Li | 4d1fa81 | 2015-09-17 18:42:06 +0800 | [diff] [blame] | 515 | |
| 516 | /* |
| 517 | * if original extent is split into zero or two parts, extent |
| 518 | * tree has been altered by deletion or insertion, therefore |
| 519 | * invalidate pointers regard to tree. |
| 520 | */ |
| 521 | if (parts != 1) { |
| 522 | insert_p = NULL; |
| 523 | insert_parent = NULL; |
| 524 | } |
Fan Li | 4d1fa81 | 2015-09-17 18:42:06 +0800 | [diff] [blame] | 525 | en = next_en; |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 526 | } |
| 527 | |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 528 | /* 3. update extent in extent cache */ |
| 529 | if (blkaddr) { |
Chao Yu | 19b2c30 | 2015-08-26 20:34:48 +0800 | [diff] [blame] | 530 | |
| 531 | set_extent_info(&ei, fofs, blkaddr, len); |
Jaegeuk Kim | 205b982 | 2016-05-20 09:52:20 -0700 | [diff] [blame] | 532 | if (!__try_merge_extent_node(inode, et, &ei, prev_en, next_en)) |
| 533 | __insert_extent_tree(inode, et, &ei, |
Chao Yu | ef05e22 | 2015-08-19 19:15:09 +0800 | [diff] [blame] | 534 | insert_p, insert_parent); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 535 | |
| 536 | /* give up extent_cache, if split and small updates happen */ |
| 537 | if (dei.len >= 1 && |
| 538 | prev.len < F2FS_MIN_EXTENT_LEN && |
| 539 | et->largest.len < F2FS_MIN_EXTENT_LEN) { |
Jaegeuk Kim | 205b982 | 2016-05-20 09:52:20 -0700 | [diff] [blame] | 540 | __drop_largest_extent(inode, 0, UINT_MAX); |
Jaegeuk Kim | 9194232 | 2016-05-20 10:13:22 -0700 | [diff] [blame] | 541 | set_inode_flag(inode, FI_NO_EXTENT); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 542 | } |
Chao Yu | 19b2c30 | 2015-08-26 20:34:48 +0800 | [diff] [blame] | 543 | } |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 544 | |
Jaegeuk Kim | 9194232 | 2016-05-20 10:13:22 -0700 | [diff] [blame] | 545 | if (is_inode_flag_set(inode, FI_NO_EXTENT)) |
Hou Pengyang | 201ef5e | 2016-01-26 12:56:26 +0000 | [diff] [blame] | 546 | __free_extent_tree(sbi, et); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 547 | |
| 548 | write_unlock(&et->lock); |
| 549 | |
| 550 | return !__is_extent_same(&prev, &et->largest); |
| 551 | } |
| 552 | |
| 553 | unsigned int f2fs_shrink_extent_tree(struct f2fs_sb_info *sbi, int nr_shrink) |
| 554 | { |
Jaegeuk Kim | 137d09f | 2015-12-31 15:02:16 -0800 | [diff] [blame] | 555 | struct extent_tree *et, *next; |
Hou Pengyang | 201ef5e | 2016-01-26 12:56:26 +0000 | [diff] [blame] | 556 | struct extent_node *en; |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 557 | unsigned int node_cnt = 0, tree_cnt = 0; |
| 558 | int remained; |
| 559 | |
| 560 | if (!test_opt(sbi, EXTENT_CACHE)) |
| 561 | return 0; |
| 562 | |
Jaegeuk Kim | 74fd8d9 | 2015-12-21 19:25:50 -0800 | [diff] [blame] | 563 | if (!atomic_read(&sbi->total_zombie_tree)) |
| 564 | goto free_node; |
| 565 | |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 566 | if (!down_write_trylock(&sbi->extent_tree_lock)) |
| 567 | goto out; |
| 568 | |
| 569 | /* 1. remove unreferenced extent tree */ |
Jaegeuk Kim | 137d09f | 2015-12-31 15:02:16 -0800 | [diff] [blame] | 570 | list_for_each_entry_safe(et, next, &sbi->zombie_list, list) { |
Chao Yu | 9b72a38 | 2016-01-08 20:24:00 +0800 | [diff] [blame] | 571 | if (atomic_read(&et->node_cnt)) { |
| 572 | write_lock(&et->lock); |
Hou Pengyang | 201ef5e | 2016-01-26 12:56:26 +0000 | [diff] [blame] | 573 | node_cnt += __free_extent_tree(sbi, et); |
Chao Yu | 9b72a38 | 2016-01-08 20:24:00 +0800 | [diff] [blame] | 574 | write_unlock(&et->lock); |
| 575 | } |
Hou Pengyang | 201ef5e | 2016-01-26 12:56:26 +0000 | [diff] [blame] | 576 | f2fs_bug_on(sbi, atomic_read(&et->node_cnt)); |
Jaegeuk Kim | 137d09f | 2015-12-31 15:02:16 -0800 | [diff] [blame] | 577 | list_del_init(&et->list); |
| 578 | radix_tree_delete(&sbi->extent_tree_root, et->ino); |
| 579 | kmem_cache_free(extent_tree_slab, et); |
| 580 | atomic_dec(&sbi->total_ext_tree); |
| 581 | atomic_dec(&sbi->total_zombie_tree); |
| 582 | tree_cnt++; |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 583 | |
Jaegeuk Kim | 137d09f | 2015-12-31 15:02:16 -0800 | [diff] [blame] | 584 | if (node_cnt + tree_cnt >= nr_shrink) |
| 585 | goto unlock_out; |
Jaegeuk Kim | 6fe2bc9 | 2016-01-20 07:31:48 +0800 | [diff] [blame] | 586 | cond_resched(); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 587 | } |
| 588 | up_write(&sbi->extent_tree_lock); |
| 589 | |
Jaegeuk Kim | 74fd8d9 | 2015-12-21 19:25:50 -0800 | [diff] [blame] | 590 | free_node: |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 591 | /* 2. remove LRU extent entries */ |
| 592 | if (!down_write_trylock(&sbi->extent_tree_lock)) |
| 593 | goto out; |
| 594 | |
| 595 | remained = nr_shrink - (node_cnt + tree_cnt); |
| 596 | |
| 597 | spin_lock(&sbi->extent_lock); |
Hou Pengyang | 201ef5e | 2016-01-26 12:56:26 +0000 | [diff] [blame] | 598 | for (; remained > 0; remained--) { |
| 599 | if (list_empty(&sbi->extent_list)) |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 600 | break; |
Hou Pengyang | 201ef5e | 2016-01-26 12:56:26 +0000 | [diff] [blame] | 601 | en = list_first_entry(&sbi->extent_list, |
| 602 | struct extent_node, list); |
| 603 | et = en->et; |
| 604 | if (!write_trylock(&et->lock)) { |
| 605 | /* refresh this extent node's position in extent list */ |
| 606 | list_move_tail(&en->list, &sbi->extent_list); |
| 607 | continue; |
| 608 | } |
| 609 | |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 610 | list_del_init(&en->list); |
Hou Pengyang | 201ef5e | 2016-01-26 12:56:26 +0000 | [diff] [blame] | 611 | spin_unlock(&sbi->extent_lock); |
| 612 | |
| 613 | __detach_extent_node(sbi, et, en); |
| 614 | |
| 615 | write_unlock(&et->lock); |
| 616 | node_cnt++; |
| 617 | spin_lock(&sbi->extent_lock); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 618 | } |
| 619 | spin_unlock(&sbi->extent_lock); |
| 620 | |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 621 | unlock_out: |
| 622 | up_write(&sbi->extent_tree_lock); |
| 623 | out: |
| 624 | trace_f2fs_shrink_extent_tree(sbi, node_cnt, tree_cnt); |
| 625 | |
| 626 | return node_cnt + tree_cnt; |
| 627 | } |
| 628 | |
| 629 | unsigned int f2fs_destroy_extent_node(struct inode *inode) |
| 630 | { |
| 631 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 632 | struct extent_tree *et = F2FS_I(inode)->extent_tree; |
| 633 | unsigned int node_cnt = 0; |
| 634 | |
Chao Yu | 9b72a38 | 2016-01-08 20:24:00 +0800 | [diff] [blame] | 635 | if (!et || !atomic_read(&et->node_cnt)) |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 636 | return 0; |
| 637 | |
| 638 | write_lock(&et->lock); |
Hou Pengyang | 201ef5e | 2016-01-26 12:56:26 +0000 | [diff] [blame] | 639 | node_cnt = __free_extent_tree(sbi, et); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 640 | write_unlock(&et->lock); |
| 641 | |
| 642 | return node_cnt; |
| 643 | } |
| 644 | |
Jaegeuk Kim | 5f281fa | 2016-07-12 11:07:52 -0700 | [diff] [blame] | 645 | void f2fs_drop_extent_tree(struct inode *inode) |
| 646 | { |
| 647 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 648 | struct extent_tree *et = F2FS_I(inode)->extent_tree; |
| 649 | |
| 650 | set_inode_flag(inode, FI_NO_EXTENT); |
| 651 | |
| 652 | write_lock(&et->lock); |
| 653 | __free_extent_tree(sbi, et); |
| 654 | __drop_largest_extent(inode, 0, UINT_MAX); |
| 655 | write_unlock(&et->lock); |
| 656 | } |
| 657 | |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 658 | void f2fs_destroy_extent_tree(struct inode *inode) |
| 659 | { |
| 660 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 661 | struct extent_tree *et = F2FS_I(inode)->extent_tree; |
| 662 | unsigned int node_cnt = 0; |
| 663 | |
| 664 | if (!et) |
| 665 | return; |
| 666 | |
Chao Yu | 68e3538 | 2016-01-08 20:22:52 +0800 | [diff] [blame] | 667 | if (inode->i_nlink && !is_bad_inode(inode) && |
| 668 | atomic_read(&et->node_cnt)) { |
Jaegeuk Kim | 137d09f | 2015-12-31 15:02:16 -0800 | [diff] [blame] | 669 | down_write(&sbi->extent_tree_lock); |
| 670 | list_add_tail(&et->list, &sbi->zombie_list); |
Jaegeuk Kim | 74fd8d9 | 2015-12-21 19:25:50 -0800 | [diff] [blame] | 671 | atomic_inc(&sbi->total_zombie_tree); |
Jaegeuk Kim | 137d09f | 2015-12-31 15:02:16 -0800 | [diff] [blame] | 672 | up_write(&sbi->extent_tree_lock); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 673 | return; |
| 674 | } |
| 675 | |
| 676 | /* free all extent info belong to this extent tree */ |
| 677 | node_cnt = f2fs_destroy_extent_node(inode); |
| 678 | |
| 679 | /* delete extent tree entry in radix tree */ |
| 680 | down_write(&sbi->extent_tree_lock); |
Chao Yu | 68e3538 | 2016-01-08 20:22:52 +0800 | [diff] [blame] | 681 | f2fs_bug_on(sbi, atomic_read(&et->node_cnt)); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 682 | radix_tree_delete(&sbi->extent_tree_root, inode->i_ino); |
| 683 | kmem_cache_free(extent_tree_slab, et); |
Jaegeuk Kim | 7441cce | 2015-12-21 19:20:15 -0800 | [diff] [blame] | 684 | atomic_dec(&sbi->total_ext_tree); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 685 | up_write(&sbi->extent_tree_lock); |
| 686 | |
| 687 | F2FS_I(inode)->extent_tree = NULL; |
| 688 | |
| 689 | trace_f2fs_destroy_extent_tree(inode, node_cnt); |
| 690 | } |
| 691 | |
| 692 | bool f2fs_lookup_extent_cache(struct inode *inode, pgoff_t pgofs, |
| 693 | struct extent_info *ei) |
| 694 | { |
| 695 | if (!f2fs_may_extent_tree(inode)) |
| 696 | return false; |
| 697 | |
| 698 | return f2fs_lookup_extent_tree(inode, pgofs, ei); |
| 699 | } |
| 700 | |
| 701 | void f2fs_update_extent_cache(struct dnode_of_data *dn) |
| 702 | { |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 703 | pgoff_t fofs; |
Chao Yu | f28b343 | 2016-02-24 17:16:47 +0800 | [diff] [blame] | 704 | block_t blkaddr; |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 705 | |
| 706 | if (!f2fs_may_extent_tree(dn->inode)) |
| 707 | return; |
| 708 | |
Chao Yu | f28b343 | 2016-02-24 17:16:47 +0800 | [diff] [blame] | 709 | if (dn->data_blkaddr == NEW_ADDR) |
| 710 | blkaddr = NULL_ADDR; |
| 711 | else |
| 712 | blkaddr = dn->data_blkaddr; |
Chao Yu | 19b2c30 | 2015-08-26 20:34:48 +0800 | [diff] [blame] | 713 | |
Chao Yu | 81ca735 | 2016-01-26 15:39:35 +0800 | [diff] [blame] | 714 | fofs = start_bidx_of_node(ofs_of_node(dn->node_page), dn->inode) + |
| 715 | dn->ofs_in_node; |
Jaegeuk Kim | ee6d182 | 2016-05-20 16:32:49 -0700 | [diff] [blame] | 716 | f2fs_update_extent_tree_range(dn->inode, fofs, blkaddr, 1); |
Chao Yu | 19b2c30 | 2015-08-26 20:34:48 +0800 | [diff] [blame] | 717 | } |
| 718 | |
| 719 | void f2fs_update_extent_cache_range(struct dnode_of_data *dn, |
| 720 | pgoff_t fofs, block_t blkaddr, unsigned int len) |
| 721 | |
| 722 | { |
| 723 | if (!f2fs_may_extent_tree(dn->inode)) |
| 724 | return; |
| 725 | |
Jaegeuk Kim | ee6d182 | 2016-05-20 16:32:49 -0700 | [diff] [blame] | 726 | f2fs_update_extent_tree_range(dn->inode, fofs, blkaddr, len); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 727 | } |
| 728 | |
| 729 | void init_extent_cache_info(struct f2fs_sb_info *sbi) |
| 730 | { |
| 731 | INIT_RADIX_TREE(&sbi->extent_tree_root, GFP_NOIO); |
| 732 | init_rwsem(&sbi->extent_tree_lock); |
| 733 | INIT_LIST_HEAD(&sbi->extent_list); |
| 734 | spin_lock_init(&sbi->extent_lock); |
Jaegeuk Kim | 7441cce | 2015-12-21 19:20:15 -0800 | [diff] [blame] | 735 | atomic_set(&sbi->total_ext_tree, 0); |
Jaegeuk Kim | 137d09f | 2015-12-31 15:02:16 -0800 | [diff] [blame] | 736 | INIT_LIST_HEAD(&sbi->zombie_list); |
Jaegeuk Kim | 74fd8d9 | 2015-12-21 19:25:50 -0800 | [diff] [blame] | 737 | atomic_set(&sbi->total_zombie_tree, 0); |
Chao Yu | a28ef1f | 2015-07-08 17:59:36 +0800 | [diff] [blame] | 738 | atomic_set(&sbi->total_ext_node, 0); |
| 739 | } |
| 740 | |
| 741 | int __init create_extent_cache(void) |
| 742 | { |
| 743 | extent_tree_slab = f2fs_kmem_cache_create("f2fs_extent_tree", |
| 744 | sizeof(struct extent_tree)); |
| 745 | if (!extent_tree_slab) |
| 746 | return -ENOMEM; |
| 747 | extent_node_slab = f2fs_kmem_cache_create("f2fs_extent_node", |
| 748 | sizeof(struct extent_node)); |
| 749 | if (!extent_node_slab) { |
| 750 | kmem_cache_destroy(extent_tree_slab); |
| 751 | return -ENOMEM; |
| 752 | } |
| 753 | return 0; |
| 754 | } |
| 755 | |
| 756 | void destroy_extent_cache(void) |
| 757 | { |
| 758 | kmem_cache_destroy(extent_node_slab); |
| 759 | kmem_cache_destroy(extent_tree_slab); |
| 760 | } |