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Commit | Line | Data |
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0a8165d7 | 1 | /* |
e05df3b1 JK |
2 | * fs/f2fs/node.c |
3 | * | |
4 | * Copyright (c) 2012 Samsung Electronics Co., Ltd. | |
5 | * http://www.samsung.com/ | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | #include <linux/fs.h> | |
12 | #include <linux/f2fs_fs.h> | |
13 | #include <linux/mpage.h> | |
14 | #include <linux/backing-dev.h> | |
15 | #include <linux/blkdev.h> | |
16 | #include <linux/pagevec.h> | |
17 | #include <linux/swap.h> | |
18 | ||
19 | #include "f2fs.h" | |
20 | #include "node.h" | |
21 | #include "segment.h" | |
9e4ded3f | 22 | #include "trace.h" |
51dd6249 | 23 | #include <trace/events/f2fs.h> |
e05df3b1 | 24 | |
f978f5a0 GZ |
25 | #define on_build_free_nids(nmi) mutex_is_locked(&nm_i->build_lock) |
26 | ||
e05df3b1 JK |
27 | static struct kmem_cache *nat_entry_slab; |
28 | static struct kmem_cache *free_nid_slab; | |
aec71382 | 29 | static struct kmem_cache *nat_entry_set_slab; |
e05df3b1 | 30 | |
6fb03f3a | 31 | bool available_free_memory(struct f2fs_sb_info *sbi, int type) |
cdfc41c1 | 32 | { |
6fb03f3a | 33 | struct f2fs_nm_info *nm_i = NM_I(sbi); |
cdfc41c1 | 34 | struct sysinfo val; |
e5e7ea3c | 35 | unsigned long avail_ram; |
cdfc41c1 | 36 | unsigned long mem_size = 0; |
6fb03f3a | 37 | bool res = false; |
cdfc41c1 JK |
38 | |
39 | si_meminfo(&val); | |
e5e7ea3c JK |
40 | |
41 | /* only uses low memory */ | |
42 | avail_ram = val.totalram - val.totalhigh; | |
43 | ||
44 | /* give 25%, 25%, 50%, 50% memory for each components respectively */ | |
6fb03f3a | 45 | if (type == FREE_NIDS) { |
e5e7ea3c JK |
46 | mem_size = (nm_i->fcnt * sizeof(struct free_nid)) >> |
47 | PAGE_CACHE_SHIFT; | |
48 | res = mem_size < ((avail_ram * nm_i->ram_thresh / 100) >> 2); | |
6fb03f3a | 49 | } else if (type == NAT_ENTRIES) { |
e5e7ea3c JK |
50 | mem_size = (nm_i->nat_cnt * sizeof(struct nat_entry)) >> |
51 | PAGE_CACHE_SHIFT; | |
52 | res = mem_size < ((avail_ram * nm_i->ram_thresh / 100) >> 2); | |
6fb03f3a | 53 | } else if (type == DIRTY_DENTS) { |
2743f865 JK |
54 | if (sbi->sb->s_bdi->dirty_exceeded) |
55 | return false; | |
6fb03f3a | 56 | mem_size = get_pages(sbi, F2FS_DIRTY_DENTS); |
e5e7ea3c JK |
57 | res = mem_size < ((avail_ram * nm_i->ram_thresh / 100) >> 1); |
58 | } else if (type == INO_ENTRIES) { | |
59 | int i; | |
60 | ||
e5e7ea3c | 61 | for (i = 0; i <= UPDATE_INO; i++) |
67298804 CY |
62 | mem_size += (sbi->im[i].ino_num * |
63 | sizeof(struct ino_entry)) >> PAGE_CACHE_SHIFT; | |
e5e7ea3c | 64 | res = mem_size < ((avail_ram * nm_i->ram_thresh / 100) >> 1); |
1e84371f JK |
65 | } else { |
66 | if (sbi->sb->s_bdi->dirty_exceeded) | |
67 | return false; | |
6fb03f3a JK |
68 | } |
69 | return res; | |
cdfc41c1 JK |
70 | } |
71 | ||
e05df3b1 JK |
72 | static void clear_node_page_dirty(struct page *page) |
73 | { | |
74 | struct address_space *mapping = page->mapping; | |
e05df3b1 JK |
75 | unsigned int long flags; |
76 | ||
77 | if (PageDirty(page)) { | |
78 | spin_lock_irqsave(&mapping->tree_lock, flags); | |
79 | radix_tree_tag_clear(&mapping->page_tree, | |
80 | page_index(page), | |
81 | PAGECACHE_TAG_DIRTY); | |
82 | spin_unlock_irqrestore(&mapping->tree_lock, flags); | |
83 | ||
84 | clear_page_dirty_for_io(page); | |
4081363f | 85 | dec_page_count(F2FS_M_SB(mapping), F2FS_DIRTY_NODES); |
e05df3b1 JK |
86 | } |
87 | ClearPageUptodate(page); | |
88 | } | |
89 | ||
90 | static struct page *get_current_nat_page(struct f2fs_sb_info *sbi, nid_t nid) | |
91 | { | |
92 | pgoff_t index = current_nat_addr(sbi, nid); | |
93 | return get_meta_page(sbi, index); | |
94 | } | |
95 | ||
96 | static struct page *get_next_nat_page(struct f2fs_sb_info *sbi, nid_t nid) | |
97 | { | |
98 | struct page *src_page; | |
99 | struct page *dst_page; | |
100 | pgoff_t src_off; | |
101 | pgoff_t dst_off; | |
102 | void *src_addr; | |
103 | void *dst_addr; | |
104 | struct f2fs_nm_info *nm_i = NM_I(sbi); | |
105 | ||
106 | src_off = current_nat_addr(sbi, nid); | |
107 | dst_off = next_nat_addr(sbi, src_off); | |
108 | ||
109 | /* get current nat block page with lock */ | |
110 | src_page = get_meta_page(sbi, src_off); | |
e05df3b1 | 111 | dst_page = grab_meta_page(sbi, dst_off); |
9850cf4a | 112 | f2fs_bug_on(sbi, PageDirty(src_page)); |
e05df3b1 JK |
113 | |
114 | src_addr = page_address(src_page); | |
115 | dst_addr = page_address(dst_page); | |
116 | memcpy(dst_addr, src_addr, PAGE_CACHE_SIZE); | |
117 | set_page_dirty(dst_page); | |
118 | f2fs_put_page(src_page, 1); | |
119 | ||
120 | set_to_next_nat(nm_i, nid); | |
121 | ||
122 | return dst_page; | |
123 | } | |
124 | ||
e05df3b1 JK |
125 | static struct nat_entry *__lookup_nat_cache(struct f2fs_nm_info *nm_i, nid_t n) |
126 | { | |
127 | return radix_tree_lookup(&nm_i->nat_root, n); | |
128 | } | |
129 | ||
130 | static unsigned int __gang_lookup_nat_cache(struct f2fs_nm_info *nm_i, | |
131 | nid_t start, unsigned int nr, struct nat_entry **ep) | |
132 | { | |
133 | return radix_tree_gang_lookup(&nm_i->nat_root, (void **)ep, start, nr); | |
134 | } | |
135 | ||
136 | static void __del_from_nat_cache(struct f2fs_nm_info *nm_i, struct nat_entry *e) | |
137 | { | |
138 | list_del(&e->list); | |
139 | radix_tree_delete(&nm_i->nat_root, nat_get_nid(e)); | |
140 | nm_i->nat_cnt--; | |
141 | kmem_cache_free(nat_entry_slab, e); | |
142 | } | |
143 | ||
309cc2b6 JK |
144 | static void __set_nat_cache_dirty(struct f2fs_nm_info *nm_i, |
145 | struct nat_entry *ne) | |
146 | { | |
147 | nid_t set = NAT_BLOCK_OFFSET(ne->ni.nid); | |
148 | struct nat_entry_set *head; | |
149 | ||
150 | if (get_nat_flag(ne, IS_DIRTY)) | |
151 | return; | |
9be32d72 | 152 | |
309cc2b6 JK |
153 | head = radix_tree_lookup(&nm_i->nat_set_root, set); |
154 | if (!head) { | |
155 | head = f2fs_kmem_cache_alloc(nat_entry_set_slab, GFP_ATOMIC); | |
156 | ||
157 | INIT_LIST_HEAD(&head->entry_list); | |
158 | INIT_LIST_HEAD(&head->set_list); | |
159 | head->set = set; | |
160 | head->entry_cnt = 0; | |
9be32d72 | 161 | f2fs_radix_tree_insert(&nm_i->nat_set_root, set, head); |
309cc2b6 JK |
162 | } |
163 | list_move_tail(&ne->list, &head->entry_list); | |
164 | nm_i->dirty_nat_cnt++; | |
165 | head->entry_cnt++; | |
166 | set_nat_flag(ne, IS_DIRTY, true); | |
167 | } | |
168 | ||
169 | static void __clear_nat_cache_dirty(struct f2fs_nm_info *nm_i, | |
170 | struct nat_entry *ne) | |
171 | { | |
20d047c8 | 172 | nid_t set = NAT_BLOCK_OFFSET(ne->ni.nid); |
309cc2b6 JK |
173 | struct nat_entry_set *head; |
174 | ||
175 | head = radix_tree_lookup(&nm_i->nat_set_root, set); | |
176 | if (head) { | |
177 | list_move_tail(&ne->list, &nm_i->nat_entries); | |
178 | set_nat_flag(ne, IS_DIRTY, false); | |
179 | head->entry_cnt--; | |
180 | nm_i->dirty_nat_cnt--; | |
181 | } | |
182 | } | |
183 | ||
184 | static unsigned int __gang_lookup_nat_set(struct f2fs_nm_info *nm_i, | |
185 | nid_t start, unsigned int nr, struct nat_entry_set **ep) | |
186 | { | |
187 | return radix_tree_gang_lookup(&nm_i->nat_set_root, (void **)ep, | |
188 | start, nr); | |
189 | } | |
190 | ||
88bd02c9 | 191 | bool is_checkpointed_node(struct f2fs_sb_info *sbi, nid_t nid) |
e05df3b1 JK |
192 | { |
193 | struct f2fs_nm_info *nm_i = NM_I(sbi); | |
194 | struct nat_entry *e; | |
88bd02c9 | 195 | bool is_cp = true; |
e05df3b1 | 196 | |
8b26ef98 | 197 | down_read(&nm_i->nat_tree_lock); |
e05df3b1 | 198 | e = __lookup_nat_cache(nm_i, nid); |
7ef35e3b | 199 | if (e && !get_nat_flag(e, IS_CHECKPOINTED)) |
88bd02c9 | 200 | is_cp = false; |
8b26ef98 | 201 | up_read(&nm_i->nat_tree_lock); |
e05df3b1 JK |
202 | return is_cp; |
203 | } | |
204 | ||
88bd02c9 | 205 | bool has_fsynced_inode(struct f2fs_sb_info *sbi, nid_t ino) |
479f40c4 JK |
206 | { |
207 | struct f2fs_nm_info *nm_i = NM_I(sbi); | |
208 | struct nat_entry *e; | |
88bd02c9 | 209 | bool fsynced = false; |
479f40c4 | 210 | |
8b26ef98 | 211 | down_read(&nm_i->nat_tree_lock); |
88bd02c9 JK |
212 | e = __lookup_nat_cache(nm_i, ino); |
213 | if (e && get_nat_flag(e, HAS_FSYNCED_INODE)) | |
214 | fsynced = true; | |
8b26ef98 | 215 | up_read(&nm_i->nat_tree_lock); |
88bd02c9 | 216 | return fsynced; |
479f40c4 JK |
217 | } |
218 | ||
88bd02c9 | 219 | bool need_inode_block_update(struct f2fs_sb_info *sbi, nid_t ino) |
b6fe5873 JK |
220 | { |
221 | struct f2fs_nm_info *nm_i = NM_I(sbi); | |
222 | struct nat_entry *e; | |
88bd02c9 | 223 | bool need_update = true; |
b6fe5873 | 224 | |
8b26ef98 | 225 | down_read(&nm_i->nat_tree_lock); |
88bd02c9 JK |
226 | e = __lookup_nat_cache(nm_i, ino); |
227 | if (e && get_nat_flag(e, HAS_LAST_FSYNC) && | |
228 | (get_nat_flag(e, IS_CHECKPOINTED) || | |
229 | get_nat_flag(e, HAS_FSYNCED_INODE))) | |
230 | need_update = false; | |
8b26ef98 | 231 | up_read(&nm_i->nat_tree_lock); |
88bd02c9 | 232 | return need_update; |
b6fe5873 JK |
233 | } |
234 | ||
e05df3b1 JK |
235 | static struct nat_entry *grab_nat_entry(struct f2fs_nm_info *nm_i, nid_t nid) |
236 | { | |
237 | struct nat_entry *new; | |
238 | ||
9be32d72 JK |
239 | new = f2fs_kmem_cache_alloc(nat_entry_slab, GFP_ATOMIC); |
240 | f2fs_radix_tree_insert(&nm_i->nat_root, nid, new); | |
e05df3b1 JK |
241 | memset(new, 0, sizeof(struct nat_entry)); |
242 | nat_set_nid(new, nid); | |
88bd02c9 | 243 | nat_reset_flag(new); |
e05df3b1 JK |
244 | list_add_tail(&new->list, &nm_i->nat_entries); |
245 | nm_i->nat_cnt++; | |
246 | return new; | |
247 | } | |
248 | ||
249 | static void cache_nat_entry(struct f2fs_nm_info *nm_i, nid_t nid, | |
250 | struct f2fs_nat_entry *ne) | |
251 | { | |
252 | struct nat_entry *e; | |
9be32d72 | 253 | |
8b26ef98 | 254 | down_write(&nm_i->nat_tree_lock); |
e05df3b1 JK |
255 | e = __lookup_nat_cache(nm_i, nid); |
256 | if (!e) { | |
257 | e = grab_nat_entry(nm_i, nid); | |
94dac22e | 258 | node_info_from_raw_nat(&e->ni, ne); |
e05df3b1 | 259 | } |
8b26ef98 | 260 | up_write(&nm_i->nat_tree_lock); |
e05df3b1 JK |
261 | } |
262 | ||
263 | static void set_node_addr(struct f2fs_sb_info *sbi, struct node_info *ni, | |
479f40c4 | 264 | block_t new_blkaddr, bool fsync_done) |
e05df3b1 JK |
265 | { |
266 | struct f2fs_nm_info *nm_i = NM_I(sbi); | |
267 | struct nat_entry *e; | |
9be32d72 | 268 | |
8b26ef98 | 269 | down_write(&nm_i->nat_tree_lock); |
e05df3b1 JK |
270 | e = __lookup_nat_cache(nm_i, ni->nid); |
271 | if (!e) { | |
272 | e = grab_nat_entry(nm_i, ni->nid); | |
5c27f4ee | 273 | copy_node_info(&e->ni, ni); |
9850cf4a | 274 | f2fs_bug_on(sbi, ni->blk_addr == NEW_ADDR); |
e05df3b1 JK |
275 | } else if (new_blkaddr == NEW_ADDR) { |
276 | /* | |
277 | * when nid is reallocated, | |
278 | * previous nat entry can be remained in nat cache. | |
279 | * So, reinitialize it with new information. | |
280 | */ | |
5c27f4ee | 281 | copy_node_info(&e->ni, ni); |
9850cf4a | 282 | f2fs_bug_on(sbi, ni->blk_addr != NULL_ADDR); |
e05df3b1 JK |
283 | } |
284 | ||
e05df3b1 | 285 | /* sanity check */ |
9850cf4a JK |
286 | f2fs_bug_on(sbi, nat_get_blkaddr(e) != ni->blk_addr); |
287 | f2fs_bug_on(sbi, nat_get_blkaddr(e) == NULL_ADDR && | |
e05df3b1 | 288 | new_blkaddr == NULL_ADDR); |
9850cf4a | 289 | f2fs_bug_on(sbi, nat_get_blkaddr(e) == NEW_ADDR && |
e05df3b1 | 290 | new_blkaddr == NEW_ADDR); |
9850cf4a | 291 | f2fs_bug_on(sbi, nat_get_blkaddr(e) != NEW_ADDR && |
e05df3b1 JK |
292 | nat_get_blkaddr(e) != NULL_ADDR && |
293 | new_blkaddr == NEW_ADDR); | |
294 | ||
e1c42045 | 295 | /* increment version no as node is removed */ |
e05df3b1 JK |
296 | if (nat_get_blkaddr(e) != NEW_ADDR && new_blkaddr == NULL_ADDR) { |
297 | unsigned char version = nat_get_version(e); | |
298 | nat_set_version(e, inc_node_version(version)); | |
299 | } | |
300 | ||
301 | /* change address */ | |
302 | nat_set_blkaddr(e, new_blkaddr); | |
88bd02c9 JK |
303 | if (new_blkaddr == NEW_ADDR || new_blkaddr == NULL_ADDR) |
304 | set_nat_flag(e, IS_CHECKPOINTED, false); | |
e05df3b1 | 305 | __set_nat_cache_dirty(nm_i, e); |
479f40c4 JK |
306 | |
307 | /* update fsync_mark if its inode nat entry is still alive */ | |
308 | e = __lookup_nat_cache(nm_i, ni->ino); | |
88bd02c9 JK |
309 | if (e) { |
310 | if (fsync_done && ni->nid == ni->ino) | |
311 | set_nat_flag(e, HAS_FSYNCED_INODE, true); | |
312 | set_nat_flag(e, HAS_LAST_FSYNC, fsync_done); | |
313 | } | |
8b26ef98 | 314 | up_write(&nm_i->nat_tree_lock); |
e05df3b1 JK |
315 | } |
316 | ||
4660f9c0 | 317 | int try_to_free_nats(struct f2fs_sb_info *sbi, int nr_shrink) |
e05df3b1 JK |
318 | { |
319 | struct f2fs_nm_info *nm_i = NM_I(sbi); | |
320 | ||
6fb03f3a | 321 | if (available_free_memory(sbi, NAT_ENTRIES)) |
e05df3b1 JK |
322 | return 0; |
323 | ||
8b26ef98 | 324 | down_write(&nm_i->nat_tree_lock); |
e05df3b1 JK |
325 | while (nr_shrink && !list_empty(&nm_i->nat_entries)) { |
326 | struct nat_entry *ne; | |
327 | ne = list_first_entry(&nm_i->nat_entries, | |
328 | struct nat_entry, list); | |
329 | __del_from_nat_cache(nm_i, ne); | |
330 | nr_shrink--; | |
331 | } | |
8b26ef98 | 332 | up_write(&nm_i->nat_tree_lock); |
e05df3b1 JK |
333 | return nr_shrink; |
334 | } | |
335 | ||
0a8165d7 | 336 | /* |
e1c42045 | 337 | * This function always returns success |
e05df3b1 JK |
338 | */ |
339 | void get_node_info(struct f2fs_sb_info *sbi, nid_t nid, struct node_info *ni) | |
340 | { | |
341 | struct f2fs_nm_info *nm_i = NM_I(sbi); | |
342 | struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); | |
343 | struct f2fs_summary_block *sum = curseg->sum_blk; | |
344 | nid_t start_nid = START_NID(nid); | |
345 | struct f2fs_nat_block *nat_blk; | |
346 | struct page *page = NULL; | |
347 | struct f2fs_nat_entry ne; | |
348 | struct nat_entry *e; | |
349 | int i; | |
350 | ||
351 | ni->nid = nid; | |
352 | ||
353 | /* Check nat cache */ | |
8b26ef98 | 354 | down_read(&nm_i->nat_tree_lock); |
e05df3b1 JK |
355 | e = __lookup_nat_cache(nm_i, nid); |
356 | if (e) { | |
357 | ni->ino = nat_get_ino(e); | |
358 | ni->blk_addr = nat_get_blkaddr(e); | |
359 | ni->version = nat_get_version(e); | |
360 | } | |
8b26ef98 | 361 | up_read(&nm_i->nat_tree_lock); |
e05df3b1 JK |
362 | if (e) |
363 | return; | |
364 | ||
3547ea96 JK |
365 | memset(&ne, 0, sizeof(struct f2fs_nat_entry)); |
366 | ||
e05df3b1 JK |
367 | /* Check current segment summary */ |
368 | mutex_lock(&curseg->curseg_mutex); | |
369 | i = lookup_journal_in_cursum(sum, NAT_JOURNAL, nid, 0); | |
370 | if (i >= 0) { | |
371 | ne = nat_in_journal(sum, i); | |
372 | node_info_from_raw_nat(ni, &ne); | |
373 | } | |
374 | mutex_unlock(&curseg->curseg_mutex); | |
375 | if (i >= 0) | |
376 | goto cache; | |
377 | ||
378 | /* Fill node_info from nat page */ | |
379 | page = get_current_nat_page(sbi, start_nid); | |
380 | nat_blk = (struct f2fs_nat_block *)page_address(page); | |
381 | ne = nat_blk->entries[nid - start_nid]; | |
382 | node_info_from_raw_nat(ni, &ne); | |
383 | f2fs_put_page(page, 1); | |
384 | cache: | |
385 | /* cache nat entry */ | |
386 | cache_nat_entry(NM_I(sbi), nid, &ne); | |
387 | } | |
388 | ||
0a8165d7 | 389 | /* |
e05df3b1 JK |
390 | * The maximum depth is four. |
391 | * Offset[0] will have raw inode offset. | |
392 | */ | |
de93653f JK |
393 | static int get_node_path(struct f2fs_inode_info *fi, long block, |
394 | int offset[4], unsigned int noffset[4]) | |
e05df3b1 | 395 | { |
de93653f | 396 | const long direct_index = ADDRS_PER_INODE(fi); |
e05df3b1 JK |
397 | const long direct_blks = ADDRS_PER_BLOCK; |
398 | const long dptrs_per_blk = NIDS_PER_BLOCK; | |
399 | const long indirect_blks = ADDRS_PER_BLOCK * NIDS_PER_BLOCK; | |
400 | const long dindirect_blks = indirect_blks * NIDS_PER_BLOCK; | |
401 | int n = 0; | |
402 | int level = 0; | |
403 | ||
404 | noffset[0] = 0; | |
405 | ||
406 | if (block < direct_index) { | |
25c0a6e5 | 407 | offset[n] = block; |
e05df3b1 JK |
408 | goto got; |
409 | } | |
410 | block -= direct_index; | |
411 | if (block < direct_blks) { | |
412 | offset[n++] = NODE_DIR1_BLOCK; | |
413 | noffset[n] = 1; | |
25c0a6e5 | 414 | offset[n] = block; |
e05df3b1 JK |
415 | level = 1; |
416 | goto got; | |
417 | } | |
418 | block -= direct_blks; | |
419 | if (block < direct_blks) { | |
420 | offset[n++] = NODE_DIR2_BLOCK; | |
421 | noffset[n] = 2; | |
25c0a6e5 | 422 | offset[n] = block; |
e05df3b1 JK |
423 | level = 1; |
424 | goto got; | |
425 | } | |
426 | block -= direct_blks; | |
427 | if (block < indirect_blks) { | |
428 | offset[n++] = NODE_IND1_BLOCK; | |
429 | noffset[n] = 3; | |
430 | offset[n++] = block / direct_blks; | |
431 | noffset[n] = 4 + offset[n - 1]; | |
25c0a6e5 | 432 | offset[n] = block % direct_blks; |
e05df3b1 JK |
433 | level = 2; |
434 | goto got; | |
435 | } | |
436 | block -= indirect_blks; | |
437 | if (block < indirect_blks) { | |
438 | offset[n++] = NODE_IND2_BLOCK; | |
439 | noffset[n] = 4 + dptrs_per_blk; | |
440 | offset[n++] = block / direct_blks; | |
441 | noffset[n] = 5 + dptrs_per_blk + offset[n - 1]; | |
25c0a6e5 | 442 | offset[n] = block % direct_blks; |
e05df3b1 JK |
443 | level = 2; |
444 | goto got; | |
445 | } | |
446 | block -= indirect_blks; | |
447 | if (block < dindirect_blks) { | |
448 | offset[n++] = NODE_DIND_BLOCK; | |
449 | noffset[n] = 5 + (dptrs_per_blk * 2); | |
450 | offset[n++] = block / indirect_blks; | |
451 | noffset[n] = 6 + (dptrs_per_blk * 2) + | |
452 | offset[n - 1] * (dptrs_per_blk + 1); | |
453 | offset[n++] = (block / direct_blks) % dptrs_per_blk; | |
454 | noffset[n] = 7 + (dptrs_per_blk * 2) + | |
455 | offset[n - 2] * (dptrs_per_blk + 1) + | |
456 | offset[n - 1]; | |
25c0a6e5 | 457 | offset[n] = block % direct_blks; |
e05df3b1 JK |
458 | level = 3; |
459 | goto got; | |
460 | } else { | |
461 | BUG(); | |
462 | } | |
463 | got: | |
464 | return level; | |
465 | } | |
466 | ||
467 | /* | |
468 | * Caller should call f2fs_put_dnode(dn). | |
4f4124d0 CY |
469 | * Also, it should grab and release a rwsem by calling f2fs_lock_op() and |
470 | * f2fs_unlock_op() only if ro is not set RDONLY_NODE. | |
39936837 | 471 | * In the case of RDONLY_NODE, we don't need to care about mutex. |
e05df3b1 | 472 | */ |
266e97a8 | 473 | int get_dnode_of_data(struct dnode_of_data *dn, pgoff_t index, int mode) |
e05df3b1 | 474 | { |
4081363f | 475 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
e05df3b1 | 476 | struct page *npage[4]; |
f1a3b98e | 477 | struct page *parent = NULL; |
e05df3b1 JK |
478 | int offset[4]; |
479 | unsigned int noffset[4]; | |
480 | nid_t nids[4]; | |
481 | int level, i; | |
482 | int err = 0; | |
483 | ||
de93653f | 484 | level = get_node_path(F2FS_I(dn->inode), index, offset, noffset); |
e05df3b1 JK |
485 | |
486 | nids[0] = dn->inode->i_ino; | |
1646cfac | 487 | npage[0] = dn->inode_page; |
e05df3b1 | 488 | |
1646cfac JK |
489 | if (!npage[0]) { |
490 | npage[0] = get_node_page(sbi, nids[0]); | |
491 | if (IS_ERR(npage[0])) | |
492 | return PTR_ERR(npage[0]); | |
493 | } | |
f1a3b98e JK |
494 | |
495 | /* if inline_data is set, should not report any block indices */ | |
496 | if (f2fs_has_inline_data(dn->inode) && index) { | |
497 | err = -EINVAL; | |
498 | f2fs_put_page(npage[0], 1); | |
499 | goto release_out; | |
500 | } | |
501 | ||
e05df3b1 | 502 | parent = npage[0]; |
52c2db3f CL |
503 | if (level != 0) |
504 | nids[1] = get_nid(parent, offset[0], true); | |
e05df3b1 JK |
505 | dn->inode_page = npage[0]; |
506 | dn->inode_page_locked = true; | |
507 | ||
508 | /* get indirect or direct nodes */ | |
509 | for (i = 1; i <= level; i++) { | |
510 | bool done = false; | |
511 | ||
266e97a8 | 512 | if (!nids[i] && mode == ALLOC_NODE) { |
e05df3b1 JK |
513 | /* alloc new node */ |
514 | if (!alloc_nid(sbi, &(nids[i]))) { | |
e05df3b1 JK |
515 | err = -ENOSPC; |
516 | goto release_pages; | |
517 | } | |
518 | ||
519 | dn->nid = nids[i]; | |
8ae8f162 | 520 | npage[i] = new_node_page(dn, noffset[i], NULL); |
e05df3b1 JK |
521 | if (IS_ERR(npage[i])) { |
522 | alloc_nid_failed(sbi, nids[i]); | |
e05df3b1 JK |
523 | err = PTR_ERR(npage[i]); |
524 | goto release_pages; | |
525 | } | |
526 | ||
527 | set_nid(parent, offset[i - 1], nids[i], i == 1); | |
528 | alloc_nid_done(sbi, nids[i]); | |
e05df3b1 | 529 | done = true; |
266e97a8 | 530 | } else if (mode == LOOKUP_NODE_RA && i == level && level > 1) { |
e05df3b1 JK |
531 | npage[i] = get_node_page_ra(parent, offset[i - 1]); |
532 | if (IS_ERR(npage[i])) { | |
533 | err = PTR_ERR(npage[i]); | |
534 | goto release_pages; | |
535 | } | |
536 | done = true; | |
537 | } | |
538 | if (i == 1) { | |
539 | dn->inode_page_locked = false; | |
540 | unlock_page(parent); | |
541 | } else { | |
542 | f2fs_put_page(parent, 1); | |
543 | } | |
544 | ||
545 | if (!done) { | |
546 | npage[i] = get_node_page(sbi, nids[i]); | |
547 | if (IS_ERR(npage[i])) { | |
548 | err = PTR_ERR(npage[i]); | |
549 | f2fs_put_page(npage[0], 0); | |
550 | goto release_out; | |
551 | } | |
552 | } | |
553 | if (i < level) { | |
554 | parent = npage[i]; | |
555 | nids[i + 1] = get_nid(parent, offset[i], false); | |
556 | } | |
557 | } | |
558 | dn->nid = nids[level]; | |
559 | dn->ofs_in_node = offset[level]; | |
560 | dn->node_page = npage[level]; | |
561 | dn->data_blkaddr = datablock_addr(dn->node_page, dn->ofs_in_node); | |
562 | return 0; | |
563 | ||
564 | release_pages: | |
565 | f2fs_put_page(parent, 1); | |
566 | if (i > 1) | |
567 | f2fs_put_page(npage[0], 0); | |
568 | release_out: | |
569 | dn->inode_page = NULL; | |
570 | dn->node_page = NULL; | |
571 | return err; | |
572 | } | |
573 | ||
574 | static void truncate_node(struct dnode_of_data *dn) | |
575 | { | |
4081363f | 576 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
e05df3b1 JK |
577 | struct node_info ni; |
578 | ||
579 | get_node_info(sbi, dn->nid, &ni); | |
71e9fec5 | 580 | if (dn->inode->i_blocks == 0) { |
9850cf4a | 581 | f2fs_bug_on(sbi, ni.blk_addr != NULL_ADDR); |
71e9fec5 JK |
582 | goto invalidate; |
583 | } | |
9850cf4a | 584 | f2fs_bug_on(sbi, ni.blk_addr == NULL_ADDR); |
e05df3b1 | 585 | |
e05df3b1 | 586 | /* Deallocate node address */ |
71e9fec5 | 587 | invalidate_blocks(sbi, ni.blk_addr); |
ef86d709 | 588 | dec_valid_node_count(sbi, dn->inode); |
479f40c4 | 589 | set_node_addr(sbi, &ni, NULL_ADDR, false); |
e05df3b1 JK |
590 | |
591 | if (dn->nid == dn->inode->i_ino) { | |
592 | remove_orphan_inode(sbi, dn->nid); | |
593 | dec_valid_inode_count(sbi); | |
594 | } else { | |
595 | sync_inode_page(dn); | |
596 | } | |
71e9fec5 | 597 | invalidate: |
e05df3b1 | 598 | clear_node_page_dirty(dn->node_page); |
caf0047e | 599 | set_sbi_flag(sbi, SBI_IS_DIRTY); |
e05df3b1 JK |
600 | |
601 | f2fs_put_page(dn->node_page, 1); | |
bf39c00a JK |
602 | |
603 | invalidate_mapping_pages(NODE_MAPPING(sbi), | |
604 | dn->node_page->index, dn->node_page->index); | |
605 | ||
e05df3b1 | 606 | dn->node_page = NULL; |
51dd6249 | 607 | trace_f2fs_truncate_node(dn->inode, dn->nid, ni.blk_addr); |
e05df3b1 JK |
608 | } |
609 | ||
610 | static int truncate_dnode(struct dnode_of_data *dn) | |
611 | { | |
e05df3b1 JK |
612 | struct page *page; |
613 | ||
614 | if (dn->nid == 0) | |
615 | return 1; | |
616 | ||
617 | /* get direct node */ | |
4081363f | 618 | page = get_node_page(F2FS_I_SB(dn->inode), dn->nid); |
e05df3b1 JK |
619 | if (IS_ERR(page) && PTR_ERR(page) == -ENOENT) |
620 | return 1; | |
621 | else if (IS_ERR(page)) | |
622 | return PTR_ERR(page); | |
623 | ||
624 | /* Make dnode_of_data for parameter */ | |
625 | dn->node_page = page; | |
626 | dn->ofs_in_node = 0; | |
627 | truncate_data_blocks(dn); | |
628 | truncate_node(dn); | |
629 | return 1; | |
630 | } | |
631 | ||
632 | static int truncate_nodes(struct dnode_of_data *dn, unsigned int nofs, | |
633 | int ofs, int depth) | |
634 | { | |
e05df3b1 JK |
635 | struct dnode_of_data rdn = *dn; |
636 | struct page *page; | |
637 | struct f2fs_node *rn; | |
638 | nid_t child_nid; | |
639 | unsigned int child_nofs; | |
640 | int freed = 0; | |
641 | int i, ret; | |
642 | ||
643 | if (dn->nid == 0) | |
644 | return NIDS_PER_BLOCK + 1; | |
645 | ||
51dd6249 NJ |
646 | trace_f2fs_truncate_nodes_enter(dn->inode, dn->nid, dn->data_blkaddr); |
647 | ||
4081363f | 648 | page = get_node_page(F2FS_I_SB(dn->inode), dn->nid); |
51dd6249 NJ |
649 | if (IS_ERR(page)) { |
650 | trace_f2fs_truncate_nodes_exit(dn->inode, PTR_ERR(page)); | |
e05df3b1 | 651 | return PTR_ERR(page); |
51dd6249 | 652 | } |
e05df3b1 | 653 | |
45590710 | 654 | rn = F2FS_NODE(page); |
e05df3b1 JK |
655 | if (depth < 3) { |
656 | for (i = ofs; i < NIDS_PER_BLOCK; i++, freed++) { | |
657 | child_nid = le32_to_cpu(rn->in.nid[i]); | |
658 | if (child_nid == 0) | |
659 | continue; | |
660 | rdn.nid = child_nid; | |
661 | ret = truncate_dnode(&rdn); | |
662 | if (ret < 0) | |
663 | goto out_err; | |
664 | set_nid(page, i, 0, false); | |
665 | } | |
666 | } else { | |
667 | child_nofs = nofs + ofs * (NIDS_PER_BLOCK + 1) + 1; | |
668 | for (i = ofs; i < NIDS_PER_BLOCK; i++) { | |
669 | child_nid = le32_to_cpu(rn->in.nid[i]); | |
670 | if (child_nid == 0) { | |
671 | child_nofs += NIDS_PER_BLOCK + 1; | |
672 | continue; | |
673 | } | |
674 | rdn.nid = child_nid; | |
675 | ret = truncate_nodes(&rdn, child_nofs, 0, depth - 1); | |
676 | if (ret == (NIDS_PER_BLOCK + 1)) { | |
677 | set_nid(page, i, 0, false); | |
678 | child_nofs += ret; | |
679 | } else if (ret < 0 && ret != -ENOENT) { | |
680 | goto out_err; | |
681 | } | |
682 | } | |
683 | freed = child_nofs; | |
684 | } | |
685 | ||
686 | if (!ofs) { | |
687 | /* remove current indirect node */ | |
688 | dn->node_page = page; | |
689 | truncate_node(dn); | |
690 | freed++; | |
691 | } else { | |
692 | f2fs_put_page(page, 1); | |
693 | } | |
51dd6249 | 694 | trace_f2fs_truncate_nodes_exit(dn->inode, freed); |
e05df3b1 JK |
695 | return freed; |
696 | ||
697 | out_err: | |
698 | f2fs_put_page(page, 1); | |
51dd6249 | 699 | trace_f2fs_truncate_nodes_exit(dn->inode, ret); |
e05df3b1 JK |
700 | return ret; |
701 | } | |
702 | ||
703 | static int truncate_partial_nodes(struct dnode_of_data *dn, | |
704 | struct f2fs_inode *ri, int *offset, int depth) | |
705 | { | |
e05df3b1 JK |
706 | struct page *pages[2]; |
707 | nid_t nid[3]; | |
708 | nid_t child_nid; | |
709 | int err = 0; | |
710 | int i; | |
711 | int idx = depth - 2; | |
712 | ||
713 | nid[0] = le32_to_cpu(ri->i_nid[offset[0] - NODE_DIR1_BLOCK]); | |
714 | if (!nid[0]) | |
715 | return 0; | |
716 | ||
717 | /* get indirect nodes in the path */ | |
a225dca3 | 718 | for (i = 0; i < idx + 1; i++) { |
e1c42045 | 719 | /* reference count'll be increased */ |
4081363f | 720 | pages[i] = get_node_page(F2FS_I_SB(dn->inode), nid[i]); |
e05df3b1 | 721 | if (IS_ERR(pages[i])) { |
e05df3b1 | 722 | err = PTR_ERR(pages[i]); |
a225dca3 | 723 | idx = i - 1; |
e05df3b1 JK |
724 | goto fail; |
725 | } | |
726 | nid[i + 1] = get_nid(pages[i], offset[i + 1], false); | |
727 | } | |
728 | ||
729 | /* free direct nodes linked to a partial indirect node */ | |
a225dca3 | 730 | for (i = offset[idx + 1]; i < NIDS_PER_BLOCK; i++) { |
e05df3b1 JK |
731 | child_nid = get_nid(pages[idx], i, false); |
732 | if (!child_nid) | |
733 | continue; | |
734 | dn->nid = child_nid; | |
735 | err = truncate_dnode(dn); | |
736 | if (err < 0) | |
737 | goto fail; | |
738 | set_nid(pages[idx], i, 0, false); | |
739 | } | |
740 | ||
a225dca3 | 741 | if (offset[idx + 1] == 0) { |
e05df3b1 JK |
742 | dn->node_page = pages[idx]; |
743 | dn->nid = nid[idx]; | |
744 | truncate_node(dn); | |
745 | } else { | |
746 | f2fs_put_page(pages[idx], 1); | |
747 | } | |
748 | offset[idx]++; | |
a225dca3 | 749 | offset[idx + 1] = 0; |
750 | idx--; | |
e05df3b1 | 751 | fail: |
a225dca3 | 752 | for (i = idx; i >= 0; i--) |
e05df3b1 | 753 | f2fs_put_page(pages[i], 1); |
51dd6249 NJ |
754 | |
755 | trace_f2fs_truncate_partial_nodes(dn->inode, nid, depth, err); | |
756 | ||
e05df3b1 JK |
757 | return err; |
758 | } | |
759 | ||
0a8165d7 | 760 | /* |
e05df3b1 JK |
761 | * All the block addresses of data and nodes should be nullified. |
762 | */ | |
763 | int truncate_inode_blocks(struct inode *inode, pgoff_t from) | |
764 | { | |
4081363f | 765 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
e05df3b1 JK |
766 | int err = 0, cont = 1; |
767 | int level, offset[4], noffset[4]; | |
7dd690c8 | 768 | unsigned int nofs = 0; |
58bfaf44 | 769 | struct f2fs_inode *ri; |
e05df3b1 JK |
770 | struct dnode_of_data dn; |
771 | struct page *page; | |
772 | ||
51dd6249 NJ |
773 | trace_f2fs_truncate_inode_blocks_enter(inode, from); |
774 | ||
de93653f | 775 | level = get_node_path(F2FS_I(inode), from, offset, noffset); |
afcb7ca0 | 776 | restart: |
e05df3b1 | 777 | page = get_node_page(sbi, inode->i_ino); |
51dd6249 NJ |
778 | if (IS_ERR(page)) { |
779 | trace_f2fs_truncate_inode_blocks_exit(inode, PTR_ERR(page)); | |
e05df3b1 | 780 | return PTR_ERR(page); |
51dd6249 | 781 | } |
e05df3b1 JK |
782 | |
783 | set_new_dnode(&dn, inode, page, NULL, 0); | |
784 | unlock_page(page); | |
785 | ||
58bfaf44 | 786 | ri = F2FS_INODE(page); |
e05df3b1 JK |
787 | switch (level) { |
788 | case 0: | |
789 | case 1: | |
790 | nofs = noffset[1]; | |
791 | break; | |
792 | case 2: | |
793 | nofs = noffset[1]; | |
794 | if (!offset[level - 1]) | |
795 | goto skip_partial; | |
58bfaf44 | 796 | err = truncate_partial_nodes(&dn, ri, offset, level); |
e05df3b1 JK |
797 | if (err < 0 && err != -ENOENT) |
798 | goto fail; | |
799 | nofs += 1 + NIDS_PER_BLOCK; | |
800 | break; | |
801 | case 3: | |
802 | nofs = 5 + 2 * NIDS_PER_BLOCK; | |
803 | if (!offset[level - 1]) | |
804 | goto skip_partial; | |
58bfaf44 | 805 | err = truncate_partial_nodes(&dn, ri, offset, level); |
e05df3b1 JK |
806 | if (err < 0 && err != -ENOENT) |
807 | goto fail; | |
808 | break; | |
809 | default: | |
810 | BUG(); | |
811 | } | |
812 | ||
813 | skip_partial: | |
814 | while (cont) { | |
58bfaf44 | 815 | dn.nid = le32_to_cpu(ri->i_nid[offset[0] - NODE_DIR1_BLOCK]); |
e05df3b1 JK |
816 | switch (offset[0]) { |
817 | case NODE_DIR1_BLOCK: | |
818 | case NODE_DIR2_BLOCK: | |
819 | err = truncate_dnode(&dn); | |
820 | break; | |
821 | ||
822 | case NODE_IND1_BLOCK: | |
823 | case NODE_IND2_BLOCK: | |
824 | err = truncate_nodes(&dn, nofs, offset[1], 2); | |
825 | break; | |
826 | ||
827 | case NODE_DIND_BLOCK: | |
828 | err = truncate_nodes(&dn, nofs, offset[1], 3); | |
829 | cont = 0; | |
830 | break; | |
831 | ||
832 | default: | |
833 | BUG(); | |
834 | } | |
835 | if (err < 0 && err != -ENOENT) | |
836 | goto fail; | |
837 | if (offset[1] == 0 && | |
58bfaf44 | 838 | ri->i_nid[offset[0] - NODE_DIR1_BLOCK]) { |
e05df3b1 | 839 | lock_page(page); |
4ef51a8f | 840 | if (unlikely(page->mapping != NODE_MAPPING(sbi))) { |
afcb7ca0 JK |
841 | f2fs_put_page(page, 1); |
842 | goto restart; | |
843 | } | |
3cb5ad15 | 844 | f2fs_wait_on_page_writeback(page, NODE); |
58bfaf44 | 845 | ri->i_nid[offset[0] - NODE_DIR1_BLOCK] = 0; |
e05df3b1 JK |
846 | set_page_dirty(page); |
847 | unlock_page(page); | |
848 | } | |
849 | offset[1] = 0; | |
850 | offset[0]++; | |
851 | nofs += err; | |
852 | } | |
853 | fail: | |
854 | f2fs_put_page(page, 0); | |
51dd6249 | 855 | trace_f2fs_truncate_inode_blocks_exit(inode, err); |
e05df3b1 JK |
856 | return err > 0 ? 0 : err; |
857 | } | |
858 | ||
4f16fb0f JK |
859 | int truncate_xattr_node(struct inode *inode, struct page *page) |
860 | { | |
4081363f | 861 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
4f16fb0f JK |
862 | nid_t nid = F2FS_I(inode)->i_xattr_nid; |
863 | struct dnode_of_data dn; | |
864 | struct page *npage; | |
865 | ||
866 | if (!nid) | |
867 | return 0; | |
868 | ||
869 | npage = get_node_page(sbi, nid); | |
870 | if (IS_ERR(npage)) | |
871 | return PTR_ERR(npage); | |
872 | ||
873 | F2FS_I(inode)->i_xattr_nid = 0; | |
65985d93 JK |
874 | |
875 | /* need to do checkpoint during fsync */ | |
876 | F2FS_I(inode)->xattr_ver = cur_cp_version(F2FS_CKPT(sbi)); | |
877 | ||
4f16fb0f JK |
878 | set_new_dnode(&dn, inode, page, npage, nid); |
879 | ||
880 | if (page) | |
01d2d1aa | 881 | dn.inode_page_locked = true; |
4f16fb0f JK |
882 | truncate_node(&dn); |
883 | return 0; | |
884 | } | |
885 | ||
39936837 | 886 | /* |
4f4124d0 CY |
887 | * Caller should grab and release a rwsem by calling f2fs_lock_op() and |
888 | * f2fs_unlock_op(). | |
39936837 | 889 | */ |
58e674d6 | 890 | void remove_inode_page(struct inode *inode) |
e05df3b1 | 891 | { |
e05df3b1 JK |
892 | struct dnode_of_data dn; |
893 | ||
c2e69583 JK |
894 | set_new_dnode(&dn, inode, NULL, NULL, inode->i_ino); |
895 | if (get_dnode_of_data(&dn, 0, LOOKUP_NODE)) | |
58e674d6 | 896 | return; |
e05df3b1 | 897 | |
c2e69583 JK |
898 | if (truncate_xattr_node(inode, dn.inode_page)) { |
899 | f2fs_put_dnode(&dn); | |
58e674d6 | 900 | return; |
e05df3b1 | 901 | } |
c2e69583 JK |
902 | |
903 | /* remove potential inline_data blocks */ | |
904 | if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
905 | S_ISLNK(inode->i_mode)) | |
906 | truncate_data_blocks_range(&dn, 1); | |
907 | ||
e1c42045 | 908 | /* 0 is possible, after f2fs_new_inode() has failed */ |
9850cf4a JK |
909 | f2fs_bug_on(F2FS_I_SB(inode), |
910 | inode->i_blocks != 0 && inode->i_blocks != 1); | |
c2e69583 JK |
911 | |
912 | /* will put inode & node pages */ | |
71e9fec5 | 913 | truncate_node(&dn); |
e05df3b1 JK |
914 | } |
915 | ||
a014e037 | 916 | struct page *new_inode_page(struct inode *inode) |
e05df3b1 | 917 | { |
e05df3b1 JK |
918 | struct dnode_of_data dn; |
919 | ||
920 | /* allocate inode page for new inode */ | |
921 | set_new_dnode(&dn, inode, NULL, NULL, inode->i_ino); | |
44a83ff6 JK |
922 | |
923 | /* caller should f2fs_put_page(page, 1); */ | |
8ae8f162 | 924 | return new_node_page(&dn, 0, NULL); |
e05df3b1 JK |
925 | } |
926 | ||
8ae8f162 JK |
927 | struct page *new_node_page(struct dnode_of_data *dn, |
928 | unsigned int ofs, struct page *ipage) | |
e05df3b1 | 929 | { |
4081363f | 930 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
e05df3b1 JK |
931 | struct node_info old_ni, new_ni; |
932 | struct page *page; | |
933 | int err; | |
934 | ||
6bacf52f | 935 | if (unlikely(is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC))) |
e05df3b1 JK |
936 | return ERR_PTR(-EPERM); |
937 | ||
54b591df | 938 | page = grab_cache_page(NODE_MAPPING(sbi), dn->nid); |
e05df3b1 JK |
939 | if (!page) |
940 | return ERR_PTR(-ENOMEM); | |
941 | ||
6bacf52f | 942 | if (unlikely(!inc_valid_node_count(sbi, dn->inode))) { |
9c02740c JK |
943 | err = -ENOSPC; |
944 | goto fail; | |
945 | } | |
e05df3b1 | 946 | |
9c02740c | 947 | get_node_info(sbi, dn->nid, &old_ni); |
e05df3b1 JK |
948 | |
949 | /* Reinitialize old_ni with new node page */ | |
9850cf4a | 950 | f2fs_bug_on(sbi, old_ni.blk_addr != NULL_ADDR); |
e05df3b1 JK |
951 | new_ni = old_ni; |
952 | new_ni.ino = dn->inode->i_ino; | |
479f40c4 | 953 | set_node_addr(sbi, &new_ni, NEW_ADDR, false); |
9c02740c | 954 | |
54b591df | 955 | f2fs_wait_on_page_writeback(page, NODE); |
9c02740c | 956 | fill_node_footer(page, dn->nid, dn->inode->i_ino, ofs, true); |
398b1ac5 | 957 | set_cold_node(dn->inode, page); |
9c02740c JK |
958 | SetPageUptodate(page); |
959 | set_page_dirty(page); | |
e05df3b1 | 960 | |
4bc8e9bc | 961 | if (f2fs_has_xattr_block(ofs)) |
479bd73a JK |
962 | F2FS_I(dn->inode)->i_xattr_nid = dn->nid; |
963 | ||
e05df3b1 | 964 | dn->node_page = page; |
8ae8f162 JK |
965 | if (ipage) |
966 | update_inode(dn->inode, ipage); | |
967 | else | |
968 | sync_inode_page(dn); | |
e05df3b1 JK |
969 | if (ofs == 0) |
970 | inc_valid_inode_count(sbi); | |
971 | ||
972 | return page; | |
973 | ||
974 | fail: | |
71e9fec5 | 975 | clear_node_page_dirty(page); |
e05df3b1 JK |
976 | f2fs_put_page(page, 1); |
977 | return ERR_PTR(err); | |
978 | } | |
979 | ||
56ae674c JK |
980 | /* |
981 | * Caller should do after getting the following values. | |
982 | * 0: f2fs_put_page(page, 0) | |
983 | * LOCKED_PAGE: f2fs_put_page(page, 1) | |
984 | * error: nothing | |
985 | */ | |
93dfe2ac | 986 | static int read_node_page(struct page *page, int rw) |
e05df3b1 | 987 | { |
4081363f | 988 | struct f2fs_sb_info *sbi = F2FS_P_SB(page); |
e05df3b1 | 989 | struct node_info ni; |
cf04e8eb JK |
990 | struct f2fs_io_info fio = { |
991 | .type = NODE, | |
992 | .rw = rw, | |
993 | }; | |
e05df3b1 JK |
994 | |
995 | get_node_info(sbi, page->index, &ni); | |
996 | ||
6bacf52f | 997 | if (unlikely(ni.blk_addr == NULL_ADDR)) { |
393ff91f | 998 | f2fs_put_page(page, 1); |
e05df3b1 | 999 | return -ENOENT; |
393ff91f JK |
1000 | } |
1001 | ||
56ae674c JK |
1002 | if (PageUptodate(page)) |
1003 | return LOCKED_PAGE; | |
393ff91f | 1004 | |
cf04e8eb JK |
1005 | fio.blk_addr = ni.blk_addr; |
1006 | return f2fs_submit_page_bio(sbi, page, &fio); | |
e05df3b1 JK |
1007 | } |
1008 | ||
0a8165d7 | 1009 | /* |
e05df3b1 JK |
1010 | * Readahead a node page |
1011 | */ | |
1012 | void ra_node_page(struct f2fs_sb_info *sbi, nid_t nid) | |
1013 | { | |
e05df3b1 | 1014 | struct page *apage; |
56ae674c | 1015 | int err; |
e05df3b1 | 1016 | |
4ef51a8f | 1017 | apage = find_get_page(NODE_MAPPING(sbi), nid); |
393ff91f JK |
1018 | if (apage && PageUptodate(apage)) { |
1019 | f2fs_put_page(apage, 0); | |
1020 | return; | |
1021 | } | |
e05df3b1 JK |
1022 | f2fs_put_page(apage, 0); |
1023 | ||
4ef51a8f | 1024 | apage = grab_cache_page(NODE_MAPPING(sbi), nid); |
e05df3b1 JK |
1025 | if (!apage) |
1026 | return; | |
1027 | ||
56ae674c JK |
1028 | err = read_node_page(apage, READA); |
1029 | if (err == 0) | |
393ff91f | 1030 | f2fs_put_page(apage, 0); |
56ae674c JK |
1031 | else if (err == LOCKED_PAGE) |
1032 | f2fs_put_page(apage, 1); | |
e05df3b1 JK |
1033 | } |
1034 | ||
1035 | struct page *get_node_page(struct f2fs_sb_info *sbi, pgoff_t nid) | |
1036 | { | |
56ae674c JK |
1037 | struct page *page; |
1038 | int err; | |
afcb7ca0 | 1039 | repeat: |
54b591df | 1040 | page = grab_cache_page(NODE_MAPPING(sbi), nid); |
e05df3b1 JK |
1041 | if (!page) |
1042 | return ERR_PTR(-ENOMEM); | |
1043 | ||
1044 | err = read_node_page(page, READ_SYNC); | |
56ae674c | 1045 | if (err < 0) |
e05df3b1 | 1046 | return ERR_PTR(err); |
aaf96075 JK |
1047 | else if (err != LOCKED_PAGE) |
1048 | lock_page(page); | |
e05df3b1 | 1049 | |
3bb5e2c8 | 1050 | if (unlikely(!PageUptodate(page) || nid != nid_of_node(page))) { |
aaf96075 | 1051 | ClearPageUptodate(page); |
393ff91f JK |
1052 | f2fs_put_page(page, 1); |
1053 | return ERR_PTR(-EIO); | |
1054 | } | |
4ef51a8f | 1055 | if (unlikely(page->mapping != NODE_MAPPING(sbi))) { |
afcb7ca0 JK |
1056 | f2fs_put_page(page, 1); |
1057 | goto repeat; | |
1058 | } | |
e05df3b1 JK |
1059 | return page; |
1060 | } | |
1061 | ||
0a8165d7 | 1062 | /* |
e05df3b1 JK |
1063 | * Return a locked page for the desired node page. |
1064 | * And, readahead MAX_RA_NODE number of node pages. | |
1065 | */ | |
1066 | struct page *get_node_page_ra(struct page *parent, int start) | |
1067 | { | |
4081363f | 1068 | struct f2fs_sb_info *sbi = F2FS_P_SB(parent); |
c718379b | 1069 | struct blk_plug plug; |
e05df3b1 | 1070 | struct page *page; |
56ae674c JK |
1071 | int err, i, end; |
1072 | nid_t nid; | |
e05df3b1 JK |
1073 | |
1074 | /* First, try getting the desired direct node. */ | |
1075 | nid = get_nid(parent, start, false); | |
1076 | if (!nid) | |
1077 | return ERR_PTR(-ENOENT); | |
afcb7ca0 | 1078 | repeat: |
4ef51a8f | 1079 | page = grab_cache_page(NODE_MAPPING(sbi), nid); |
e05df3b1 JK |
1080 | if (!page) |
1081 | return ERR_PTR(-ENOMEM); | |
1082 | ||
66d36a29 | 1083 | err = read_node_page(page, READ_SYNC); |
56ae674c | 1084 | if (err < 0) |
e05df3b1 | 1085 | return ERR_PTR(err); |
56ae674c JK |
1086 | else if (err == LOCKED_PAGE) |
1087 | goto page_hit; | |
e05df3b1 | 1088 | |
c718379b JK |
1089 | blk_start_plug(&plug); |
1090 | ||
e05df3b1 JK |
1091 | /* Then, try readahead for siblings of the desired node */ |
1092 | end = start + MAX_RA_NODE; | |
1093 | end = min(end, NIDS_PER_BLOCK); | |
1094 | for (i = start + 1; i < end; i++) { | |
1095 | nid = get_nid(parent, i, false); | |
1096 | if (!nid) | |
1097 | continue; | |
1098 | ra_node_page(sbi, nid); | |
1099 | } | |
1100 | ||
c718379b JK |
1101 | blk_finish_plug(&plug); |
1102 | ||
e05df3b1 | 1103 | lock_page(page); |
4ef51a8f | 1104 | if (unlikely(page->mapping != NODE_MAPPING(sbi))) { |
afcb7ca0 JK |
1105 | f2fs_put_page(page, 1); |
1106 | goto repeat; | |
1107 | } | |
e0f56cb4 | 1108 | page_hit: |
6bacf52f | 1109 | if (unlikely(!PageUptodate(page))) { |
e05df3b1 JK |
1110 | f2fs_put_page(page, 1); |
1111 | return ERR_PTR(-EIO); | |
1112 | } | |
e05df3b1 JK |
1113 | return page; |
1114 | } | |
1115 | ||
1116 | void sync_inode_page(struct dnode_of_data *dn) | |
1117 | { | |
1118 | if (IS_INODE(dn->node_page) || dn->inode_page == dn->node_page) { | |
1119 | update_inode(dn->inode, dn->node_page); | |
1120 | } else if (dn->inode_page) { | |
1121 | if (!dn->inode_page_locked) | |
1122 | lock_page(dn->inode_page); | |
1123 | update_inode(dn->inode, dn->inode_page); | |
1124 | if (!dn->inode_page_locked) | |
1125 | unlock_page(dn->inode_page); | |
1126 | } else { | |
39936837 | 1127 | update_inode_page(dn->inode); |
e05df3b1 JK |
1128 | } |
1129 | } | |
1130 | ||
1131 | int sync_node_pages(struct f2fs_sb_info *sbi, nid_t ino, | |
1132 | struct writeback_control *wbc) | |
1133 | { | |
e05df3b1 JK |
1134 | pgoff_t index, end; |
1135 | struct pagevec pvec; | |
1136 | int step = ino ? 2 : 0; | |
1137 | int nwritten = 0, wrote = 0; | |
1138 | ||
1139 | pagevec_init(&pvec, 0); | |
1140 | ||
1141 | next_step: | |
1142 | index = 0; | |
1143 | end = LONG_MAX; | |
1144 | ||
1145 | while (index <= end) { | |
1146 | int i, nr_pages; | |
4ef51a8f | 1147 | nr_pages = pagevec_lookup_tag(&pvec, NODE_MAPPING(sbi), &index, |
e05df3b1 JK |
1148 | PAGECACHE_TAG_DIRTY, |
1149 | min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1); | |
1150 | if (nr_pages == 0) | |
1151 | break; | |
1152 | ||
1153 | for (i = 0; i < nr_pages; i++) { | |
1154 | struct page *page = pvec.pages[i]; | |
1155 | ||
1156 | /* | |
1157 | * flushing sequence with step: | |
1158 | * 0. indirect nodes | |
1159 | * 1. dentry dnodes | |
1160 | * 2. file dnodes | |
1161 | */ | |
1162 | if (step == 0 && IS_DNODE(page)) | |
1163 | continue; | |
1164 | if (step == 1 && (!IS_DNODE(page) || | |
1165 | is_cold_node(page))) | |
1166 | continue; | |
1167 | if (step == 2 && (!IS_DNODE(page) || | |
1168 | !is_cold_node(page))) | |
1169 | continue; | |
1170 | ||
1171 | /* | |
1172 | * If an fsync mode, | |
1173 | * we should not skip writing node pages. | |
1174 | */ | |
1175 | if (ino && ino_of_node(page) == ino) | |
1176 | lock_page(page); | |
1177 | else if (!trylock_page(page)) | |
1178 | continue; | |
1179 | ||
4ef51a8f | 1180 | if (unlikely(page->mapping != NODE_MAPPING(sbi))) { |
e05df3b1 JK |
1181 | continue_unlock: |
1182 | unlock_page(page); | |
1183 | continue; | |
1184 | } | |
1185 | if (ino && ino_of_node(page) != ino) | |
1186 | goto continue_unlock; | |
1187 | ||
1188 | if (!PageDirty(page)) { | |
1189 | /* someone wrote it for us */ | |
1190 | goto continue_unlock; | |
1191 | } | |
1192 | ||
1193 | if (!clear_page_dirty_for_io(page)) | |
1194 | goto continue_unlock; | |
1195 | ||
1196 | /* called by fsync() */ | |
1197 | if (ino && IS_DNODE(page)) { | |
e05df3b1 | 1198 | set_fsync_mark(page, 1); |
88bd02c9 JK |
1199 | if (IS_INODE(page)) { |
1200 | if (!is_checkpointed_node(sbi, ino) && | |
1201 | !has_fsynced_inode(sbi, ino)) | |
1202 | set_dentry_mark(page, 1); | |
1203 | else | |
1204 | set_dentry_mark(page, 0); | |
1205 | } | |
e05df3b1 JK |
1206 | nwritten++; |
1207 | } else { | |
1208 | set_fsync_mark(page, 0); | |
1209 | set_dentry_mark(page, 0); | |
1210 | } | |
52746519 JK |
1211 | |
1212 | if (NODE_MAPPING(sbi)->a_ops->writepage(page, wbc)) | |
1213 | unlock_page(page); | |
1214 | else | |
1215 | wrote++; | |
e05df3b1 JK |
1216 | |
1217 | if (--wbc->nr_to_write == 0) | |
1218 | break; | |
1219 | } | |
1220 | pagevec_release(&pvec); | |
1221 | cond_resched(); | |
1222 | ||
1223 | if (wbc->nr_to_write == 0) { | |
1224 | step = 2; | |
1225 | break; | |
1226 | } | |
1227 | } | |
1228 | ||
1229 | if (step < 2) { | |
1230 | step++; | |
1231 | goto next_step; | |
1232 | } | |
1233 | ||
1234 | if (wrote) | |
458e6197 | 1235 | f2fs_submit_merged_bio(sbi, NODE, WRITE); |
e05df3b1 JK |
1236 | return nwritten; |
1237 | } | |
1238 | ||
cfe58f9d JK |
1239 | int wait_on_node_pages_writeback(struct f2fs_sb_info *sbi, nid_t ino) |
1240 | { | |
cfe58f9d JK |
1241 | pgoff_t index = 0, end = LONG_MAX; |
1242 | struct pagevec pvec; | |
cfe58f9d JK |
1243 | int ret2 = 0, ret = 0; |
1244 | ||
1245 | pagevec_init(&pvec, 0); | |
4ef51a8f JK |
1246 | |
1247 | while (index <= end) { | |
1248 | int i, nr_pages; | |
1249 | nr_pages = pagevec_lookup_tag(&pvec, NODE_MAPPING(sbi), &index, | |
1250 | PAGECACHE_TAG_WRITEBACK, | |
1251 | min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1); | |
1252 | if (nr_pages == 0) | |
1253 | break; | |
cfe58f9d JK |
1254 | |
1255 | for (i = 0; i < nr_pages; i++) { | |
1256 | struct page *page = pvec.pages[i]; | |
1257 | ||
1258 | /* until radix tree lookup accepts end_index */ | |
cfb271d4 | 1259 | if (unlikely(page->index > end)) |
cfe58f9d JK |
1260 | continue; |
1261 | ||
4bf08ff6 | 1262 | if (ino && ino_of_node(page) == ino) { |
3cb5ad15 | 1263 | f2fs_wait_on_page_writeback(page, NODE); |
4bf08ff6 CY |
1264 | if (TestClearPageError(page)) |
1265 | ret = -EIO; | |
1266 | } | |
cfe58f9d JK |
1267 | } |
1268 | pagevec_release(&pvec); | |
1269 | cond_resched(); | |
1270 | } | |
1271 | ||
4ef51a8f | 1272 | if (unlikely(test_and_clear_bit(AS_ENOSPC, &NODE_MAPPING(sbi)->flags))) |
cfe58f9d | 1273 | ret2 = -ENOSPC; |
4ef51a8f | 1274 | if (unlikely(test_and_clear_bit(AS_EIO, &NODE_MAPPING(sbi)->flags))) |
cfe58f9d JK |
1275 | ret2 = -EIO; |
1276 | if (!ret) | |
1277 | ret = ret2; | |
1278 | return ret; | |
1279 | } | |
1280 | ||
e05df3b1 JK |
1281 | static int f2fs_write_node_page(struct page *page, |
1282 | struct writeback_control *wbc) | |
1283 | { | |
4081363f | 1284 | struct f2fs_sb_info *sbi = F2FS_P_SB(page); |
e05df3b1 | 1285 | nid_t nid; |
e05df3b1 | 1286 | struct node_info ni; |
fb5566da JK |
1287 | struct f2fs_io_info fio = { |
1288 | .type = NODE, | |
6c311ec6 | 1289 | .rw = (wbc->sync_mode == WB_SYNC_ALL) ? WRITE_SYNC : WRITE, |
fb5566da | 1290 | }; |
e05df3b1 | 1291 | |
ecda0de3 CY |
1292 | trace_f2fs_writepage(page, NODE); |
1293 | ||
caf0047e | 1294 | if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) |
87a9bd26 | 1295 | goto redirty_out; |
cf779cab JK |
1296 | if (unlikely(f2fs_cp_error(sbi))) |
1297 | goto redirty_out; | |
87a9bd26 | 1298 | |
3cb5ad15 | 1299 | f2fs_wait_on_page_writeback(page, NODE); |
e05df3b1 | 1300 | |
e05df3b1 JK |
1301 | /* get old block addr of this node page */ |
1302 | nid = nid_of_node(page); | |
9850cf4a | 1303 | f2fs_bug_on(sbi, page->index != nid); |
e05df3b1 JK |
1304 | |
1305 | get_node_info(sbi, nid, &ni); | |
1306 | ||
1307 | /* This page is already truncated */ | |
6bacf52f | 1308 | if (unlikely(ni.blk_addr == NULL_ADDR)) { |
39936837 JK |
1309 | dec_page_count(sbi, F2FS_DIRTY_NODES); |
1310 | unlock_page(page); | |
1311 | return 0; | |
1312 | } | |
e05df3b1 | 1313 | |
2f97c326 JK |
1314 | if (wbc->for_reclaim) { |
1315 | if (!down_read_trylock(&sbi->node_write)) | |
1316 | goto redirty_out; | |
1317 | } else { | |
1318 | down_read(&sbi->node_write); | |
1319 | } | |
cf04e8eb | 1320 | |
e05df3b1 | 1321 | set_page_writeback(page); |
cf04e8eb JK |
1322 | fio.blk_addr = ni.blk_addr; |
1323 | write_node_page(sbi, page, nid, &fio); | |
1324 | set_node_addr(sbi, &ni, fio.blk_addr, is_fsync_dnode(page)); | |
e05df3b1 | 1325 | dec_page_count(sbi, F2FS_DIRTY_NODES); |
b3582c68 | 1326 | up_read(&sbi->node_write); |
e05df3b1 | 1327 | unlock_page(page); |
27c6bd60 JK |
1328 | |
1329 | if (wbc->for_reclaim) | |
1330 | f2fs_submit_merged_bio(sbi, NODE, WRITE); | |
1331 | ||
e05df3b1 | 1332 | return 0; |
87a9bd26 JK |
1333 | |
1334 | redirty_out: | |
76f60268 | 1335 | redirty_page_for_writepage(wbc, page); |
87a9bd26 | 1336 | return AOP_WRITEPAGE_ACTIVATE; |
e05df3b1 JK |
1337 | } |
1338 | ||
1339 | static int f2fs_write_node_pages(struct address_space *mapping, | |
1340 | struct writeback_control *wbc) | |
1341 | { | |
4081363f | 1342 | struct f2fs_sb_info *sbi = F2FS_M_SB(mapping); |
50c8cdb3 | 1343 | long diff; |
e05df3b1 | 1344 | |
e5748434 CY |
1345 | trace_f2fs_writepages(mapping->host, wbc, NODE); |
1346 | ||
4660f9c0 JK |
1347 | /* balancing f2fs's metadata in background */ |
1348 | f2fs_balance_fs_bg(sbi); | |
e05df3b1 | 1349 | |
a7fdffbd | 1350 | /* collect a number of dirty node pages and write together */ |
87d6f890 | 1351 | if (get_pages(sbi, F2FS_DIRTY_NODES) < nr_pages_to_skip(sbi, NODE)) |
d3baf95d | 1352 | goto skip_write; |
a7fdffbd | 1353 | |
50c8cdb3 | 1354 | diff = nr_pages_to_write(sbi, NODE, wbc); |
fb5566da | 1355 | wbc->sync_mode = WB_SYNC_NONE; |
e05df3b1 | 1356 | sync_node_pages(sbi, 0, wbc); |
50c8cdb3 | 1357 | wbc->nr_to_write = max((long)0, wbc->nr_to_write - diff); |
e05df3b1 | 1358 | return 0; |
d3baf95d JK |
1359 | |
1360 | skip_write: | |
1361 | wbc->pages_skipped += get_pages(sbi, F2FS_DIRTY_NODES); | |
1362 | return 0; | |
e05df3b1 JK |
1363 | } |
1364 | ||
1365 | static int f2fs_set_node_page_dirty(struct page *page) | |
1366 | { | |
26c6b887 JK |
1367 | trace_f2fs_set_page_dirty(page, NODE); |
1368 | ||
e05df3b1 JK |
1369 | SetPageUptodate(page); |
1370 | if (!PageDirty(page)) { | |
1371 | __set_page_dirty_nobuffers(page); | |
4081363f | 1372 | inc_page_count(F2FS_P_SB(page), F2FS_DIRTY_NODES); |
e05df3b1 | 1373 | SetPagePrivate(page); |
9e4ded3f | 1374 | f2fs_trace_pid(page); |
e05df3b1 JK |
1375 | return 1; |
1376 | } | |
1377 | return 0; | |
1378 | } | |
1379 | ||
0a8165d7 | 1380 | /* |
e05df3b1 JK |
1381 | * Structure of the f2fs node operations |
1382 | */ | |
1383 | const struct address_space_operations f2fs_node_aops = { | |
1384 | .writepage = f2fs_write_node_page, | |
1385 | .writepages = f2fs_write_node_pages, | |
1386 | .set_page_dirty = f2fs_set_node_page_dirty, | |
487261f3 CY |
1387 | .invalidatepage = f2fs_invalidate_page, |
1388 | .releasepage = f2fs_release_page, | |
e05df3b1 JK |
1389 | }; |
1390 | ||
8a7ed66a JK |
1391 | static struct free_nid *__lookup_free_nid_list(struct f2fs_nm_info *nm_i, |
1392 | nid_t n) | |
e05df3b1 | 1393 | { |
8a7ed66a | 1394 | return radix_tree_lookup(&nm_i->free_nid_root, n); |
e05df3b1 JK |
1395 | } |
1396 | ||
8a7ed66a JK |
1397 | static void __del_from_free_nid_list(struct f2fs_nm_info *nm_i, |
1398 | struct free_nid *i) | |
e05df3b1 JK |
1399 | { |
1400 | list_del(&i->list); | |
8a7ed66a | 1401 | radix_tree_delete(&nm_i->free_nid_root, i->nid); |
e05df3b1 JK |
1402 | } |
1403 | ||
6fb03f3a | 1404 | static int add_free_nid(struct f2fs_sb_info *sbi, nid_t nid, bool build) |
e05df3b1 | 1405 | { |
6fb03f3a | 1406 | struct f2fs_nm_info *nm_i = NM_I(sbi); |
e05df3b1 | 1407 | struct free_nid *i; |
59bbd474 JK |
1408 | struct nat_entry *ne; |
1409 | bool allocated = false; | |
e05df3b1 | 1410 | |
6fb03f3a | 1411 | if (!available_free_memory(sbi, FREE_NIDS)) |
23d38844 | 1412 | return -1; |
9198aceb JK |
1413 | |
1414 | /* 0 nid should not be used */ | |
cfb271d4 | 1415 | if (unlikely(nid == 0)) |
9198aceb | 1416 | return 0; |
59bbd474 | 1417 | |
7bd59381 GZ |
1418 | if (build) { |
1419 | /* do not add allocated nids */ | |
8b26ef98 | 1420 | down_read(&nm_i->nat_tree_lock); |
7bd59381 | 1421 | ne = __lookup_nat_cache(nm_i, nid); |
8a7ed66a | 1422 | if (ne && |
7ef35e3b JK |
1423 | (!get_nat_flag(ne, IS_CHECKPOINTED) || |
1424 | nat_get_blkaddr(ne) != NULL_ADDR)) | |
7bd59381 | 1425 | allocated = true; |
8b26ef98 | 1426 | up_read(&nm_i->nat_tree_lock); |
7bd59381 GZ |
1427 | if (allocated) |
1428 | return 0; | |
e05df3b1 | 1429 | } |
7bd59381 GZ |
1430 | |
1431 | i = f2fs_kmem_cache_alloc(free_nid_slab, GFP_NOFS); | |
e05df3b1 JK |
1432 | i->nid = nid; |
1433 | i->state = NID_NEW; | |
1434 | ||
769ec6e5 JK |
1435 | if (radix_tree_preload(GFP_NOFS)) { |
1436 | kmem_cache_free(free_nid_slab, i); | |
1437 | return 0; | |
1438 | } | |
1439 | ||
e05df3b1 | 1440 | spin_lock(&nm_i->free_nid_list_lock); |
8a7ed66a | 1441 | if (radix_tree_insert(&nm_i->free_nid_root, i->nid, i)) { |
e05df3b1 | 1442 | spin_unlock(&nm_i->free_nid_list_lock); |
769ec6e5 | 1443 | radix_tree_preload_end(); |
e05df3b1 JK |
1444 | kmem_cache_free(free_nid_slab, i); |
1445 | return 0; | |
1446 | } | |
1447 | list_add_tail(&i->list, &nm_i->free_nid_list); | |
1448 | nm_i->fcnt++; | |
1449 | spin_unlock(&nm_i->free_nid_list_lock); | |
769ec6e5 | 1450 | radix_tree_preload_end(); |
e05df3b1 JK |
1451 | return 1; |
1452 | } | |
1453 | ||
1454 | static void remove_free_nid(struct f2fs_nm_info *nm_i, nid_t nid) | |
1455 | { | |
1456 | struct free_nid *i; | |
cf0ee0f0 CY |
1457 | bool need_free = false; |
1458 | ||
e05df3b1 | 1459 | spin_lock(&nm_i->free_nid_list_lock); |
8a7ed66a | 1460 | i = __lookup_free_nid_list(nm_i, nid); |
e05df3b1 | 1461 | if (i && i->state == NID_NEW) { |
8a7ed66a | 1462 | __del_from_free_nid_list(nm_i, i); |
e05df3b1 | 1463 | nm_i->fcnt--; |
cf0ee0f0 | 1464 | need_free = true; |
e05df3b1 JK |
1465 | } |
1466 | spin_unlock(&nm_i->free_nid_list_lock); | |
cf0ee0f0 CY |
1467 | |
1468 | if (need_free) | |
1469 | kmem_cache_free(free_nid_slab, i); | |
e05df3b1 JK |
1470 | } |
1471 | ||
6fb03f3a | 1472 | static void scan_nat_page(struct f2fs_sb_info *sbi, |
e05df3b1 JK |
1473 | struct page *nat_page, nid_t start_nid) |
1474 | { | |
6fb03f3a | 1475 | struct f2fs_nm_info *nm_i = NM_I(sbi); |
e05df3b1 JK |
1476 | struct f2fs_nat_block *nat_blk = page_address(nat_page); |
1477 | block_t blk_addr; | |
e05df3b1 JK |
1478 | int i; |
1479 | ||
e05df3b1 JK |
1480 | i = start_nid % NAT_ENTRY_PER_BLOCK; |
1481 | ||
1482 | for (; i < NAT_ENTRY_PER_BLOCK; i++, start_nid++) { | |
23d38844 | 1483 | |
cfb271d4 | 1484 | if (unlikely(start_nid >= nm_i->max_nid)) |
04431c44 | 1485 | break; |
23d38844 HL |
1486 | |
1487 | blk_addr = le32_to_cpu(nat_blk->entries[i].block_addr); | |
9850cf4a | 1488 | f2fs_bug_on(sbi, blk_addr == NEW_ADDR); |
23d38844 | 1489 | if (blk_addr == NULL_ADDR) { |
6fb03f3a | 1490 | if (add_free_nid(sbi, start_nid, true) < 0) |
23d38844 HL |
1491 | break; |
1492 | } | |
e05df3b1 | 1493 | } |
e05df3b1 JK |
1494 | } |
1495 | ||
1496 | static void build_free_nids(struct f2fs_sb_info *sbi) | |
1497 | { | |
e05df3b1 JK |
1498 | struct f2fs_nm_info *nm_i = NM_I(sbi); |
1499 | struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); | |
1500 | struct f2fs_summary_block *sum = curseg->sum_blk; | |
8760952d | 1501 | int i = 0; |
55008d84 | 1502 | nid_t nid = nm_i->next_scan_nid; |
e05df3b1 | 1503 | |
55008d84 JK |
1504 | /* Enough entries */ |
1505 | if (nm_i->fcnt > NAT_ENTRY_PER_BLOCK) | |
1506 | return; | |
e05df3b1 | 1507 | |
55008d84 | 1508 | /* readahead nat pages to be scanned */ |
662befda | 1509 | ra_meta_pages(sbi, NAT_BLOCK_OFFSET(nid), FREE_NID_PAGES, META_NAT); |
e05df3b1 JK |
1510 | |
1511 | while (1) { | |
1512 | struct page *page = get_current_nat_page(sbi, nid); | |
1513 | ||
6fb03f3a | 1514 | scan_nat_page(sbi, page, nid); |
e05df3b1 JK |
1515 | f2fs_put_page(page, 1); |
1516 | ||
1517 | nid += (NAT_ENTRY_PER_BLOCK - (nid % NAT_ENTRY_PER_BLOCK)); | |
cfb271d4 | 1518 | if (unlikely(nid >= nm_i->max_nid)) |
e05df3b1 | 1519 | nid = 0; |
55008d84 JK |
1520 | |
1521 | if (i++ == FREE_NID_PAGES) | |
e05df3b1 JK |
1522 | break; |
1523 | } | |
1524 | ||
55008d84 JK |
1525 | /* go to the next free nat pages to find free nids abundantly */ |
1526 | nm_i->next_scan_nid = nid; | |
e05df3b1 JK |
1527 | |
1528 | /* find free nids from current sum_pages */ | |
1529 | mutex_lock(&curseg->curseg_mutex); | |
1530 | for (i = 0; i < nats_in_cursum(sum); i++) { | |
1531 | block_t addr = le32_to_cpu(nat_in_journal(sum, i).block_addr); | |
1532 | nid = le32_to_cpu(nid_in_journal(sum, i)); | |
1533 | if (addr == NULL_ADDR) | |
6fb03f3a | 1534 | add_free_nid(sbi, nid, true); |
e05df3b1 JK |
1535 | else |
1536 | remove_free_nid(nm_i, nid); | |
1537 | } | |
1538 | mutex_unlock(&curseg->curseg_mutex); | |
e05df3b1 JK |
1539 | } |
1540 | ||
1541 | /* | |
1542 | * If this function returns success, caller can obtain a new nid | |
1543 | * from second parameter of this function. | |
1544 | * The returned nid could be used ino as well as nid when inode is created. | |
1545 | */ | |
1546 | bool alloc_nid(struct f2fs_sb_info *sbi, nid_t *nid) | |
1547 | { | |
1548 | struct f2fs_nm_info *nm_i = NM_I(sbi); | |
1549 | struct free_nid *i = NULL; | |
e05df3b1 | 1550 | retry: |
7ee0eeab | 1551 | if (unlikely(sbi->total_valid_node_count + 1 > nm_i->available_nids)) |
55008d84 | 1552 | return false; |
e05df3b1 | 1553 | |
e05df3b1 | 1554 | spin_lock(&nm_i->free_nid_list_lock); |
e05df3b1 | 1555 | |
55008d84 | 1556 | /* We should not use stale free nids created by build_free_nids */ |
f978f5a0 | 1557 | if (nm_i->fcnt && !on_build_free_nids(nm_i)) { |
9850cf4a | 1558 | f2fs_bug_on(sbi, list_empty(&nm_i->free_nid_list)); |
2d7b822a | 1559 | list_for_each_entry(i, &nm_i->free_nid_list, list) |
55008d84 JK |
1560 | if (i->state == NID_NEW) |
1561 | break; | |
e05df3b1 | 1562 | |
9850cf4a | 1563 | f2fs_bug_on(sbi, i->state != NID_NEW); |
55008d84 JK |
1564 | *nid = i->nid; |
1565 | i->state = NID_ALLOC; | |
1566 | nm_i->fcnt--; | |
1567 | spin_unlock(&nm_i->free_nid_list_lock); | |
1568 | return true; | |
1569 | } | |
e05df3b1 | 1570 | spin_unlock(&nm_i->free_nid_list_lock); |
55008d84 JK |
1571 | |
1572 | /* Let's scan nat pages and its caches to get free nids */ | |
1573 | mutex_lock(&nm_i->build_lock); | |
55008d84 | 1574 | build_free_nids(sbi); |
55008d84 JK |
1575 | mutex_unlock(&nm_i->build_lock); |
1576 | goto retry; | |
e05df3b1 JK |
1577 | } |
1578 | ||
0a8165d7 | 1579 | /* |
e05df3b1 JK |
1580 | * alloc_nid() should be called prior to this function. |
1581 | */ | |
1582 | void alloc_nid_done(struct f2fs_sb_info *sbi, nid_t nid) | |
1583 | { | |
1584 | struct f2fs_nm_info *nm_i = NM_I(sbi); | |
1585 | struct free_nid *i; | |
1586 | ||
1587 | spin_lock(&nm_i->free_nid_list_lock); | |
8a7ed66a | 1588 | i = __lookup_free_nid_list(nm_i, nid); |
9850cf4a | 1589 | f2fs_bug_on(sbi, !i || i->state != NID_ALLOC); |
8a7ed66a | 1590 | __del_from_free_nid_list(nm_i, i); |
e05df3b1 | 1591 | spin_unlock(&nm_i->free_nid_list_lock); |
cf0ee0f0 CY |
1592 | |
1593 | kmem_cache_free(free_nid_slab, i); | |
e05df3b1 JK |
1594 | } |
1595 | ||
0a8165d7 | 1596 | /* |
e05df3b1 JK |
1597 | * alloc_nid() should be called prior to this function. |
1598 | */ | |
1599 | void alloc_nid_failed(struct f2fs_sb_info *sbi, nid_t nid) | |
1600 | { | |
49952fa1 JK |
1601 | struct f2fs_nm_info *nm_i = NM_I(sbi); |
1602 | struct free_nid *i; | |
cf0ee0f0 | 1603 | bool need_free = false; |
49952fa1 | 1604 | |
65985d93 JK |
1605 | if (!nid) |
1606 | return; | |
1607 | ||
49952fa1 | 1608 | spin_lock(&nm_i->free_nid_list_lock); |
8a7ed66a | 1609 | i = __lookup_free_nid_list(nm_i, nid); |
9850cf4a | 1610 | f2fs_bug_on(sbi, !i || i->state != NID_ALLOC); |
6fb03f3a | 1611 | if (!available_free_memory(sbi, FREE_NIDS)) { |
8a7ed66a | 1612 | __del_from_free_nid_list(nm_i, i); |
cf0ee0f0 | 1613 | need_free = true; |
95630cba HL |
1614 | } else { |
1615 | i->state = NID_NEW; | |
1616 | nm_i->fcnt++; | |
1617 | } | |
49952fa1 | 1618 | spin_unlock(&nm_i->free_nid_list_lock); |
cf0ee0f0 CY |
1619 | |
1620 | if (need_free) | |
1621 | kmem_cache_free(free_nid_slab, i); | |
e05df3b1 JK |
1622 | } |
1623 | ||
70cfed88 | 1624 | void recover_inline_xattr(struct inode *inode, struct page *page) |
28cdce04 | 1625 | { |
28cdce04 CY |
1626 | void *src_addr, *dst_addr; |
1627 | size_t inline_size; | |
1628 | struct page *ipage; | |
1629 | struct f2fs_inode *ri; | |
1630 | ||
4081363f | 1631 | ipage = get_node_page(F2FS_I_SB(inode), inode->i_ino); |
9850cf4a | 1632 | f2fs_bug_on(F2FS_I_SB(inode), IS_ERR(ipage)); |
28cdce04 | 1633 | |
e3b4d43f JK |
1634 | ri = F2FS_INODE(page); |
1635 | if (!(ri->i_inline & F2FS_INLINE_XATTR)) { | |
1636 | clear_inode_flag(F2FS_I(inode), FI_INLINE_XATTR); | |
1637 | goto update_inode; | |
1638 | } | |
1639 | ||
28cdce04 CY |
1640 | dst_addr = inline_xattr_addr(ipage); |
1641 | src_addr = inline_xattr_addr(page); | |
1642 | inline_size = inline_xattr_size(inode); | |
1643 | ||
54b591df | 1644 | f2fs_wait_on_page_writeback(ipage, NODE); |
28cdce04 | 1645 | memcpy(dst_addr, src_addr, inline_size); |
e3b4d43f | 1646 | update_inode: |
28cdce04 CY |
1647 | update_inode(inode, ipage); |
1648 | f2fs_put_page(ipage, 1); | |
1649 | } | |
1650 | ||
1c35a90e | 1651 | void recover_xattr_data(struct inode *inode, struct page *page, block_t blkaddr) |
abb2366c | 1652 | { |
4081363f | 1653 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
abb2366c JK |
1654 | nid_t prev_xnid = F2FS_I(inode)->i_xattr_nid; |
1655 | nid_t new_xnid = nid_of_node(page); | |
1656 | struct node_info ni; | |
1657 | ||
abb2366c JK |
1658 | /* 1: invalidate the previous xattr nid */ |
1659 | if (!prev_xnid) | |
1660 | goto recover_xnid; | |
1661 | ||
1662 | /* Deallocate node address */ | |
1663 | get_node_info(sbi, prev_xnid, &ni); | |
9850cf4a | 1664 | f2fs_bug_on(sbi, ni.blk_addr == NULL_ADDR); |
abb2366c JK |
1665 | invalidate_blocks(sbi, ni.blk_addr); |
1666 | dec_valid_node_count(sbi, inode); | |
479f40c4 | 1667 | set_node_addr(sbi, &ni, NULL_ADDR, false); |
abb2366c JK |
1668 | |
1669 | recover_xnid: | |
1670 | /* 2: allocate new xattr nid */ | |
1671 | if (unlikely(!inc_valid_node_count(sbi, inode))) | |
9850cf4a | 1672 | f2fs_bug_on(sbi, 1); |
abb2366c JK |
1673 | |
1674 | remove_free_nid(NM_I(sbi), new_xnid); | |
1675 | get_node_info(sbi, new_xnid, &ni); | |
1676 | ni.ino = inode->i_ino; | |
479f40c4 | 1677 | set_node_addr(sbi, &ni, NEW_ADDR, false); |
abb2366c JK |
1678 | F2FS_I(inode)->i_xattr_nid = new_xnid; |
1679 | ||
1680 | /* 3: update xattr blkaddr */ | |
1681 | refresh_sit_entry(sbi, NEW_ADDR, blkaddr); | |
479f40c4 | 1682 | set_node_addr(sbi, &ni, blkaddr, false); |
abb2366c JK |
1683 | |
1684 | update_inode_page(inode); | |
abb2366c JK |
1685 | } |
1686 | ||
e05df3b1 JK |
1687 | int recover_inode_page(struct f2fs_sb_info *sbi, struct page *page) |
1688 | { | |
58bfaf44 | 1689 | struct f2fs_inode *src, *dst; |
e05df3b1 JK |
1690 | nid_t ino = ino_of_node(page); |
1691 | struct node_info old_ni, new_ni; | |
1692 | struct page *ipage; | |
1693 | ||
e8271fa3 JK |
1694 | get_node_info(sbi, ino, &old_ni); |
1695 | ||
1696 | if (unlikely(old_ni.blk_addr != NULL_ADDR)) | |
1697 | return -EINVAL; | |
1698 | ||
4ef51a8f | 1699 | ipage = grab_cache_page(NODE_MAPPING(sbi), ino); |
e05df3b1 JK |
1700 | if (!ipage) |
1701 | return -ENOMEM; | |
1702 | ||
e1c42045 | 1703 | /* Should not use this inode from free nid list */ |
e05df3b1 JK |
1704 | remove_free_nid(NM_I(sbi), ino); |
1705 | ||
e05df3b1 JK |
1706 | SetPageUptodate(ipage); |
1707 | fill_node_footer(ipage, ino, ino, 0, true); | |
1708 | ||
58bfaf44 JK |
1709 | src = F2FS_INODE(page); |
1710 | dst = F2FS_INODE(ipage); | |
e05df3b1 | 1711 | |
58bfaf44 JK |
1712 | memcpy(dst, src, (unsigned long)&src->i_ext - (unsigned long)src); |
1713 | dst->i_size = 0; | |
1714 | dst->i_blocks = cpu_to_le64(1); | |
1715 | dst->i_links = cpu_to_le32(1); | |
1716 | dst->i_xattr_nid = 0; | |
617deb8c | 1717 | dst->i_inline = src->i_inline & F2FS_INLINE_XATTR; |
e05df3b1 JK |
1718 | |
1719 | new_ni = old_ni; | |
1720 | new_ni.ino = ino; | |
1721 | ||
cfb271d4 | 1722 | if (unlikely(!inc_valid_node_count(sbi, NULL))) |
65e5cd0a | 1723 | WARN_ON(1); |
479f40c4 | 1724 | set_node_addr(sbi, &new_ni, NEW_ADDR, false); |
e05df3b1 | 1725 | inc_valid_inode_count(sbi); |
617deb8c | 1726 | set_page_dirty(ipage); |
e05df3b1 JK |
1727 | f2fs_put_page(ipage, 1); |
1728 | return 0; | |
1729 | } | |
1730 | ||
1731 | int restore_node_summary(struct f2fs_sb_info *sbi, | |
1732 | unsigned int segno, struct f2fs_summary_block *sum) | |
1733 | { | |
1734 | struct f2fs_node *rn; | |
1735 | struct f2fs_summary *sum_entry; | |
e05df3b1 | 1736 | block_t addr; |
90a893c7 | 1737 | int bio_blocks = MAX_BIO_BLOCKS(sbi); |
9ecf4b80 | 1738 | int i, idx, last_offset, nrpages; |
e05df3b1 JK |
1739 | |
1740 | /* scan the node segment */ | |
1741 | last_offset = sbi->blocks_per_seg; | |
1742 | addr = START_BLOCK(sbi, segno); | |
1743 | sum_entry = &sum->entries[0]; | |
1744 | ||
9ecf4b80 | 1745 | for (i = 0; i < last_offset; i += nrpages, addr += nrpages) { |
9af0ff1c | 1746 | nrpages = min(last_offset - i, bio_blocks); |
393ff91f | 1747 | |
e1c42045 | 1748 | /* readahead node pages */ |
9ecf4b80 | 1749 | ra_meta_pages(sbi, addr, nrpages, META_POR); |
e05df3b1 | 1750 | |
9ecf4b80 CY |
1751 | for (idx = addr; idx < addr + nrpages; idx++) { |
1752 | struct page *page = get_meta_page(sbi, idx); | |
9af0ff1c | 1753 | |
9ecf4b80 CY |
1754 | rn = F2FS_NODE(page); |
1755 | sum_entry->nid = rn->footer.nid; | |
1756 | sum_entry->version = 0; | |
1757 | sum_entry->ofs_in_node = 0; | |
1758 | sum_entry++; | |
1759 | f2fs_put_page(page, 1); | |
9af0ff1c | 1760 | } |
bac4eef6 | 1761 | |
9ecf4b80 | 1762 | invalidate_mapping_pages(META_MAPPING(sbi), addr, |
bac4eef6 | 1763 | addr + nrpages); |
e05df3b1 | 1764 | } |
9ecf4b80 | 1765 | return 0; |
e05df3b1 JK |
1766 | } |
1767 | ||
aec71382 | 1768 | static void remove_nats_in_journal(struct f2fs_sb_info *sbi) |
e05df3b1 JK |
1769 | { |
1770 | struct f2fs_nm_info *nm_i = NM_I(sbi); | |
1771 | struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); | |
1772 | struct f2fs_summary_block *sum = curseg->sum_blk; | |
1773 | int i; | |
1774 | ||
1775 | mutex_lock(&curseg->curseg_mutex); | |
e05df3b1 JK |
1776 | for (i = 0; i < nats_in_cursum(sum); i++) { |
1777 | struct nat_entry *ne; | |
1778 | struct f2fs_nat_entry raw_ne; | |
1779 | nid_t nid = le32_to_cpu(nid_in_journal(sum, i)); | |
1780 | ||
1781 | raw_ne = nat_in_journal(sum, i); | |
9be32d72 | 1782 | |
8b26ef98 | 1783 | down_write(&nm_i->nat_tree_lock); |
e05df3b1 | 1784 | ne = __lookup_nat_cache(nm_i, nid); |
e05df3b1 | 1785 | if (!ne) { |
9be32d72 JK |
1786 | ne = grab_nat_entry(nm_i, nid); |
1787 | node_info_from_raw_nat(&ne->ni, &raw_ne); | |
e05df3b1 | 1788 | } |
e05df3b1 | 1789 | __set_nat_cache_dirty(nm_i, ne); |
8b26ef98 | 1790 | up_write(&nm_i->nat_tree_lock); |
e05df3b1 JK |
1791 | } |
1792 | update_nats_in_cursum(sum, -i); | |
1793 | mutex_unlock(&curseg->curseg_mutex); | |
e05df3b1 JK |
1794 | } |
1795 | ||
309cc2b6 JK |
1796 | static void __adjust_nat_entry_set(struct nat_entry_set *nes, |
1797 | struct list_head *head, int max) | |
e05df3b1 | 1798 | { |
309cc2b6 | 1799 | struct nat_entry_set *cur; |
e05df3b1 | 1800 | |
309cc2b6 JK |
1801 | if (nes->entry_cnt >= max) |
1802 | goto add_out; | |
e05df3b1 | 1803 | |
309cc2b6 JK |
1804 | list_for_each_entry(cur, head, set_list) { |
1805 | if (cur->entry_cnt >= nes->entry_cnt) { | |
1806 | list_add(&nes->set_list, cur->set_list.prev); | |
1807 | return; | |
1808 | } | |
aec71382 | 1809 | } |
309cc2b6 JK |
1810 | add_out: |
1811 | list_add_tail(&nes->set_list, head); | |
1812 | } | |
e05df3b1 | 1813 | |
309cc2b6 JK |
1814 | static void __flush_nat_entry_set(struct f2fs_sb_info *sbi, |
1815 | struct nat_entry_set *set) | |
1816 | { | |
1817 | struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); | |
1818 | struct f2fs_summary_block *sum = curseg->sum_blk; | |
1819 | nid_t start_nid = set->set * NAT_ENTRY_PER_BLOCK; | |
1820 | bool to_journal = true; | |
1821 | struct f2fs_nat_block *nat_blk; | |
1822 | struct nat_entry *ne, *cur; | |
1823 | struct page *page = NULL; | |
e05df3b1 | 1824 | |
aec71382 CY |
1825 | /* |
1826 | * there are two steps to flush nat entries: | |
1827 | * #1, flush nat entries to journal in current hot data summary block. | |
1828 | * #2, flush nat entries to nat page. | |
1829 | */ | |
309cc2b6 JK |
1830 | if (!__has_cursum_space(sum, set->entry_cnt, NAT_JOURNAL)) |
1831 | to_journal = false; | |
1832 | ||
1833 | if (to_journal) { | |
1834 | mutex_lock(&curseg->curseg_mutex); | |
1835 | } else { | |
1836 | page = get_next_nat_page(sbi, start_nid); | |
1837 | nat_blk = page_address(page); | |
1838 | f2fs_bug_on(sbi, !nat_blk); | |
1839 | } | |
aec71382 | 1840 | |
309cc2b6 JK |
1841 | /* flush dirty nats in nat entry set */ |
1842 | list_for_each_entry_safe(ne, cur, &set->entry_list, list) { | |
1843 | struct f2fs_nat_entry *raw_ne; | |
1844 | nid_t nid = nat_get_nid(ne); | |
1845 | int offset; | |
1846 | ||
1847 | if (nat_get_blkaddr(ne) == NEW_ADDR) | |
1848 | continue; | |
aec71382 CY |
1849 | |
1850 | if (to_journal) { | |
309cc2b6 JK |
1851 | offset = lookup_journal_in_cursum(sum, |
1852 | NAT_JOURNAL, nid, 1); | |
1853 | f2fs_bug_on(sbi, offset < 0); | |
1854 | raw_ne = &nat_in_journal(sum, offset); | |
1855 | nid_in_journal(sum, offset) = cpu_to_le32(nid); | |
aec71382 | 1856 | } else { |
309cc2b6 | 1857 | raw_ne = &nat_blk->entries[nid - start_nid]; |
e05df3b1 | 1858 | } |
309cc2b6 | 1859 | raw_nat_from_node_info(raw_ne, &ne->ni); |
e05df3b1 | 1860 | |
8b26ef98 | 1861 | down_write(&NM_I(sbi)->nat_tree_lock); |
309cc2b6 JK |
1862 | nat_reset_flag(ne); |
1863 | __clear_nat_cache_dirty(NM_I(sbi), ne); | |
8b26ef98 | 1864 | up_write(&NM_I(sbi)->nat_tree_lock); |
aec71382 | 1865 | |
309cc2b6 JK |
1866 | if (nat_get_blkaddr(ne) == NULL_ADDR) |
1867 | add_free_nid(sbi, nid, false); | |
1868 | } | |
e05df3b1 | 1869 | |
309cc2b6 JK |
1870 | if (to_journal) |
1871 | mutex_unlock(&curseg->curseg_mutex); | |
1872 | else | |
1873 | f2fs_put_page(page, 1); | |
aec71382 | 1874 | |
80ec2e91 CL |
1875 | f2fs_bug_on(sbi, set->entry_cnt); |
1876 | ||
1877 | radix_tree_delete(&NM_I(sbi)->nat_set_root, set->set); | |
1878 | kmem_cache_free(nat_entry_set_slab, set); | |
309cc2b6 | 1879 | } |
aec71382 | 1880 | |
309cc2b6 JK |
1881 | /* |
1882 | * This function is called during the checkpointing process. | |
1883 | */ | |
1884 | void flush_nat_entries(struct f2fs_sb_info *sbi) | |
1885 | { | |
1886 | struct f2fs_nm_info *nm_i = NM_I(sbi); | |
1887 | struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); | |
1888 | struct f2fs_summary_block *sum = curseg->sum_blk; | |
7aed0d45 | 1889 | struct nat_entry_set *setvec[SETVEC_SIZE]; |
309cc2b6 JK |
1890 | struct nat_entry_set *set, *tmp; |
1891 | unsigned int found; | |
1892 | nid_t set_idx = 0; | |
1893 | LIST_HEAD(sets); | |
1894 | ||
20d047c8 CL |
1895 | if (!nm_i->dirty_nat_cnt) |
1896 | return; | |
309cc2b6 JK |
1897 | /* |
1898 | * if there are no enough space in journal to store dirty nat | |
1899 | * entries, remove all entries from journal and merge them | |
1900 | * into nat entry set. | |
1901 | */ | |
1902 | if (!__has_cursum_space(sum, nm_i->dirty_nat_cnt, NAT_JOURNAL)) | |
1903 | remove_nats_in_journal(sbi); | |
1904 | ||
309cc2b6 | 1905 | while ((found = __gang_lookup_nat_set(nm_i, |
7aed0d45 | 1906 | set_idx, SETVEC_SIZE, setvec))) { |
309cc2b6 JK |
1907 | unsigned idx; |
1908 | set_idx = setvec[found - 1]->set + 1; | |
1909 | for (idx = 0; idx < found; idx++) | |
1910 | __adjust_nat_entry_set(setvec[idx], &sets, | |
1911 | MAX_NAT_JENTRIES(sum)); | |
e05df3b1 | 1912 | } |
aec71382 | 1913 | |
309cc2b6 JK |
1914 | /* flush dirty nats in nat entry set */ |
1915 | list_for_each_entry_safe(set, tmp, &sets, set_list) | |
1916 | __flush_nat_entry_set(sbi, set); | |
1917 | ||
9850cf4a | 1918 | f2fs_bug_on(sbi, nm_i->dirty_nat_cnt); |
e05df3b1 JK |
1919 | } |
1920 | ||
1921 | static int init_node_manager(struct f2fs_sb_info *sbi) | |
1922 | { | |
1923 | struct f2fs_super_block *sb_raw = F2FS_RAW_SUPER(sbi); | |
1924 | struct f2fs_nm_info *nm_i = NM_I(sbi); | |
1925 | unsigned char *version_bitmap; | |
1926 | unsigned int nat_segs, nat_blocks; | |
1927 | ||
1928 | nm_i->nat_blkaddr = le32_to_cpu(sb_raw->nat_blkaddr); | |
1929 | ||
1930 | /* segment_count_nat includes pair segment so divide to 2. */ | |
1931 | nat_segs = le32_to_cpu(sb_raw->segment_count_nat) >> 1; | |
1932 | nat_blocks = nat_segs << le32_to_cpu(sb_raw->log_blocks_per_seg); | |
b63da15e | 1933 | |
7ee0eeab JK |
1934 | nm_i->max_nid = NAT_ENTRY_PER_BLOCK * nat_blocks; |
1935 | ||
b63da15e | 1936 | /* not used nids: 0, node, meta, (and root counted as valid node) */ |
c200b1aa | 1937 | nm_i->available_nids = nm_i->max_nid - F2FS_RESERVED_NODE_NUM; |
e05df3b1 JK |
1938 | nm_i->fcnt = 0; |
1939 | nm_i->nat_cnt = 0; | |
cdfc41c1 | 1940 | nm_i->ram_thresh = DEF_RAM_THRESHOLD; |
e05df3b1 | 1941 | |
8a7ed66a | 1942 | INIT_RADIX_TREE(&nm_i->free_nid_root, GFP_ATOMIC); |
e05df3b1 | 1943 | INIT_LIST_HEAD(&nm_i->free_nid_list); |
769ec6e5 JK |
1944 | INIT_RADIX_TREE(&nm_i->nat_root, GFP_NOIO); |
1945 | INIT_RADIX_TREE(&nm_i->nat_set_root, GFP_NOIO); | |
e05df3b1 | 1946 | INIT_LIST_HEAD(&nm_i->nat_entries); |
e05df3b1 JK |
1947 | |
1948 | mutex_init(&nm_i->build_lock); | |
1949 | spin_lock_init(&nm_i->free_nid_list_lock); | |
8b26ef98 | 1950 | init_rwsem(&nm_i->nat_tree_lock); |
e05df3b1 | 1951 | |
e05df3b1 | 1952 | nm_i->next_scan_nid = le32_to_cpu(sbi->ckpt->next_free_nid); |
79b5793b | 1953 | nm_i->bitmap_size = __bitmap_size(sbi, NAT_BITMAP); |
e05df3b1 JK |
1954 | version_bitmap = __bitmap_ptr(sbi, NAT_BITMAP); |
1955 | if (!version_bitmap) | |
1956 | return -EFAULT; | |
1957 | ||
79b5793b AG |
1958 | nm_i->nat_bitmap = kmemdup(version_bitmap, nm_i->bitmap_size, |
1959 | GFP_KERNEL); | |
1960 | if (!nm_i->nat_bitmap) | |
1961 | return -ENOMEM; | |
e05df3b1 JK |
1962 | return 0; |
1963 | } | |
1964 | ||
1965 | int build_node_manager(struct f2fs_sb_info *sbi) | |
1966 | { | |
1967 | int err; | |
1968 | ||
1969 | sbi->nm_info = kzalloc(sizeof(struct f2fs_nm_info), GFP_KERNEL); | |
1970 | if (!sbi->nm_info) | |
1971 | return -ENOMEM; | |
1972 | ||
1973 | err = init_node_manager(sbi); | |
1974 | if (err) | |
1975 | return err; | |
1976 | ||
1977 | build_free_nids(sbi); | |
1978 | return 0; | |
1979 | } | |
1980 | ||
1981 | void destroy_node_manager(struct f2fs_sb_info *sbi) | |
1982 | { | |
1983 | struct f2fs_nm_info *nm_i = NM_I(sbi); | |
1984 | struct free_nid *i, *next_i; | |
1985 | struct nat_entry *natvec[NATVEC_SIZE]; | |
7aed0d45 | 1986 | struct nat_entry_set *setvec[SETVEC_SIZE]; |
e05df3b1 JK |
1987 | nid_t nid = 0; |
1988 | unsigned int found; | |
1989 | ||
1990 | if (!nm_i) | |
1991 | return; | |
1992 | ||
1993 | /* destroy free nid list */ | |
1994 | spin_lock(&nm_i->free_nid_list_lock); | |
1995 | list_for_each_entry_safe(i, next_i, &nm_i->free_nid_list, list) { | |
9850cf4a | 1996 | f2fs_bug_on(sbi, i->state == NID_ALLOC); |
8a7ed66a | 1997 | __del_from_free_nid_list(nm_i, i); |
e05df3b1 | 1998 | nm_i->fcnt--; |
cf0ee0f0 CY |
1999 | spin_unlock(&nm_i->free_nid_list_lock); |
2000 | kmem_cache_free(free_nid_slab, i); | |
2001 | spin_lock(&nm_i->free_nid_list_lock); | |
e05df3b1 | 2002 | } |
9850cf4a | 2003 | f2fs_bug_on(sbi, nm_i->fcnt); |
e05df3b1 JK |
2004 | spin_unlock(&nm_i->free_nid_list_lock); |
2005 | ||
2006 | /* destroy nat cache */ | |
8b26ef98 | 2007 | down_write(&nm_i->nat_tree_lock); |
e05df3b1 JK |
2008 | while ((found = __gang_lookup_nat_cache(nm_i, |
2009 | nid, NATVEC_SIZE, natvec))) { | |
2010 | unsigned idx; | |
7aed0d45 | 2011 | |
b6ce391e GZ |
2012 | nid = nat_get_nid(natvec[found - 1]) + 1; |
2013 | for (idx = 0; idx < found; idx++) | |
2014 | __del_from_nat_cache(nm_i, natvec[idx]); | |
e05df3b1 | 2015 | } |
9850cf4a | 2016 | f2fs_bug_on(sbi, nm_i->nat_cnt); |
7aed0d45 JK |
2017 | |
2018 | /* destroy nat set cache */ | |
2019 | nid = 0; | |
2020 | while ((found = __gang_lookup_nat_set(nm_i, | |
2021 | nid, SETVEC_SIZE, setvec))) { | |
2022 | unsigned idx; | |
2023 | ||
2024 | nid = setvec[found - 1]->set + 1; | |
2025 | for (idx = 0; idx < found; idx++) { | |
2026 | /* entry_cnt is not zero, when cp_error was occurred */ | |
2027 | f2fs_bug_on(sbi, !list_empty(&setvec[idx]->entry_list)); | |
2028 | radix_tree_delete(&nm_i->nat_set_root, setvec[idx]->set); | |
2029 | kmem_cache_free(nat_entry_set_slab, setvec[idx]); | |
2030 | } | |
2031 | } | |
8b26ef98 | 2032 | up_write(&nm_i->nat_tree_lock); |
e05df3b1 JK |
2033 | |
2034 | kfree(nm_i->nat_bitmap); | |
2035 | sbi->nm_info = NULL; | |
2036 | kfree(nm_i); | |
2037 | } | |
2038 | ||
6e6093a8 | 2039 | int __init create_node_manager_caches(void) |
e05df3b1 JK |
2040 | { |
2041 | nat_entry_slab = f2fs_kmem_cache_create("nat_entry", | |
e8512d2e | 2042 | sizeof(struct nat_entry)); |
e05df3b1 | 2043 | if (!nat_entry_slab) |
aec71382 | 2044 | goto fail; |
e05df3b1 JK |
2045 | |
2046 | free_nid_slab = f2fs_kmem_cache_create("free_nid", | |
e8512d2e | 2047 | sizeof(struct free_nid)); |
aec71382 | 2048 | if (!free_nid_slab) |
ce3e6d25 | 2049 | goto destroy_nat_entry; |
aec71382 CY |
2050 | |
2051 | nat_entry_set_slab = f2fs_kmem_cache_create("nat_entry_set", | |
2052 | sizeof(struct nat_entry_set)); | |
2053 | if (!nat_entry_set_slab) | |
ce3e6d25 | 2054 | goto destroy_free_nid; |
e05df3b1 | 2055 | return 0; |
aec71382 | 2056 | |
ce3e6d25 | 2057 | destroy_free_nid: |
aec71382 | 2058 | kmem_cache_destroy(free_nid_slab); |
ce3e6d25 | 2059 | destroy_nat_entry: |
aec71382 CY |
2060 | kmem_cache_destroy(nat_entry_slab); |
2061 | fail: | |
2062 | return -ENOMEM; | |
e05df3b1 JK |
2063 | } |
2064 | ||
2065 | void destroy_node_manager_caches(void) | |
2066 | { | |
aec71382 | 2067 | kmem_cache_destroy(nat_entry_set_slab); |
e05df3b1 JK |
2068 | kmem_cache_destroy(free_nid_slab); |
2069 | kmem_cache_destroy(nat_entry_slab); | |
2070 | } |