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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" | |
51dd6249 | 22 | #include <trace/events/f2fs.h> |
e05df3b1 JK |
23 | |
24 | static struct kmem_cache *nat_entry_slab; | |
25 | static struct kmem_cache *free_nid_slab; | |
26 | ||
27 | static void clear_node_page_dirty(struct page *page) | |
28 | { | |
29 | struct address_space *mapping = page->mapping; | |
30 | struct f2fs_sb_info *sbi = F2FS_SB(mapping->host->i_sb); | |
31 | unsigned int long flags; | |
32 | ||
33 | if (PageDirty(page)) { | |
34 | spin_lock_irqsave(&mapping->tree_lock, flags); | |
35 | radix_tree_tag_clear(&mapping->page_tree, | |
36 | page_index(page), | |
37 | PAGECACHE_TAG_DIRTY); | |
38 | spin_unlock_irqrestore(&mapping->tree_lock, flags); | |
39 | ||
40 | clear_page_dirty_for_io(page); | |
41 | dec_page_count(sbi, F2FS_DIRTY_NODES); | |
42 | } | |
43 | ClearPageUptodate(page); | |
44 | } | |
45 | ||
46 | static struct page *get_current_nat_page(struct f2fs_sb_info *sbi, nid_t nid) | |
47 | { | |
48 | pgoff_t index = current_nat_addr(sbi, nid); | |
49 | return get_meta_page(sbi, index); | |
50 | } | |
51 | ||
52 | static struct page *get_next_nat_page(struct f2fs_sb_info *sbi, nid_t nid) | |
53 | { | |
54 | struct page *src_page; | |
55 | struct page *dst_page; | |
56 | pgoff_t src_off; | |
57 | pgoff_t dst_off; | |
58 | void *src_addr; | |
59 | void *dst_addr; | |
60 | struct f2fs_nm_info *nm_i = NM_I(sbi); | |
61 | ||
62 | src_off = current_nat_addr(sbi, nid); | |
63 | dst_off = next_nat_addr(sbi, src_off); | |
64 | ||
65 | /* get current nat block page with lock */ | |
66 | src_page = get_meta_page(sbi, src_off); | |
67 | ||
68 | /* Dirty src_page means that it is already the new target NAT page. */ | |
69 | if (PageDirty(src_page)) | |
70 | return src_page; | |
71 | ||
72 | dst_page = grab_meta_page(sbi, dst_off); | |
73 | ||
74 | src_addr = page_address(src_page); | |
75 | dst_addr = page_address(dst_page); | |
76 | memcpy(dst_addr, src_addr, PAGE_CACHE_SIZE); | |
77 | set_page_dirty(dst_page); | |
78 | f2fs_put_page(src_page, 1); | |
79 | ||
80 | set_to_next_nat(nm_i, nid); | |
81 | ||
82 | return dst_page; | |
83 | } | |
84 | ||
0a8165d7 | 85 | /* |
e05df3b1 JK |
86 | * Readahead NAT pages |
87 | */ | |
88 | static void ra_nat_pages(struct f2fs_sb_info *sbi, int nid) | |
89 | { | |
9df27d98 | 90 | struct address_space *mapping = META_MAPPING(sbi); |
e05df3b1 JK |
91 | struct f2fs_nm_info *nm_i = NM_I(sbi); |
92 | struct page *page; | |
93 | pgoff_t index; | |
94 | int i; | |
458e6197 JK |
95 | struct f2fs_io_info fio = { |
96 | .type = META, | |
7e8f2308 | 97 | .rw = READ_SYNC | REQ_META | REQ_PRIO |
458e6197 JK |
98 | }; |
99 | ||
e05df3b1 JK |
100 | |
101 | for (i = 0; i < FREE_NID_PAGES; i++, nid += NAT_ENTRY_PER_BLOCK) { | |
cfb271d4 | 102 | if (unlikely(nid >= nm_i->max_nid)) |
e05df3b1 JK |
103 | nid = 0; |
104 | index = current_nat_addr(sbi, nid); | |
105 | ||
106 | page = grab_cache_page(mapping, index); | |
107 | if (!page) | |
108 | continue; | |
393ff91f | 109 | if (PageUptodate(page)) { |
7107e0a9 | 110 | mark_page_accessed(page); |
e05df3b1 JK |
111 | f2fs_put_page(page, 1); |
112 | continue; | |
113 | } | |
458e6197 | 114 | f2fs_submit_page_mbio(sbi, page, index, &fio); |
7107e0a9 | 115 | mark_page_accessed(page); |
369a708c | 116 | f2fs_put_page(page, 0); |
e05df3b1 | 117 | } |
458e6197 | 118 | f2fs_submit_merged_bio(sbi, META, READ); |
e05df3b1 JK |
119 | } |
120 | ||
121 | static struct nat_entry *__lookup_nat_cache(struct f2fs_nm_info *nm_i, nid_t n) | |
122 | { | |
123 | return radix_tree_lookup(&nm_i->nat_root, n); | |
124 | } | |
125 | ||
126 | static unsigned int __gang_lookup_nat_cache(struct f2fs_nm_info *nm_i, | |
127 | nid_t start, unsigned int nr, struct nat_entry **ep) | |
128 | { | |
129 | return radix_tree_gang_lookup(&nm_i->nat_root, (void **)ep, start, nr); | |
130 | } | |
131 | ||
132 | static void __del_from_nat_cache(struct f2fs_nm_info *nm_i, struct nat_entry *e) | |
133 | { | |
134 | list_del(&e->list); | |
135 | radix_tree_delete(&nm_i->nat_root, nat_get_nid(e)); | |
136 | nm_i->nat_cnt--; | |
137 | kmem_cache_free(nat_entry_slab, e); | |
138 | } | |
139 | ||
140 | int is_checkpointed_node(struct f2fs_sb_info *sbi, nid_t nid) | |
141 | { | |
142 | struct f2fs_nm_info *nm_i = NM_I(sbi); | |
143 | struct nat_entry *e; | |
144 | int is_cp = 1; | |
145 | ||
146 | read_lock(&nm_i->nat_tree_lock); | |
147 | e = __lookup_nat_cache(nm_i, nid); | |
148 | if (e && !e->checkpointed) | |
149 | is_cp = 0; | |
150 | read_unlock(&nm_i->nat_tree_lock); | |
151 | return is_cp; | |
152 | } | |
153 | ||
154 | static struct nat_entry *grab_nat_entry(struct f2fs_nm_info *nm_i, nid_t nid) | |
155 | { | |
156 | struct nat_entry *new; | |
157 | ||
158 | new = kmem_cache_alloc(nat_entry_slab, GFP_ATOMIC); | |
159 | if (!new) | |
160 | return NULL; | |
161 | if (radix_tree_insert(&nm_i->nat_root, nid, new)) { | |
162 | kmem_cache_free(nat_entry_slab, new); | |
163 | return NULL; | |
164 | } | |
165 | memset(new, 0, sizeof(struct nat_entry)); | |
166 | nat_set_nid(new, nid); | |
167 | list_add_tail(&new->list, &nm_i->nat_entries); | |
168 | nm_i->nat_cnt++; | |
169 | return new; | |
170 | } | |
171 | ||
172 | static void cache_nat_entry(struct f2fs_nm_info *nm_i, nid_t nid, | |
173 | struct f2fs_nat_entry *ne) | |
174 | { | |
175 | struct nat_entry *e; | |
176 | retry: | |
177 | write_lock(&nm_i->nat_tree_lock); | |
178 | e = __lookup_nat_cache(nm_i, nid); | |
179 | if (!e) { | |
180 | e = grab_nat_entry(nm_i, nid); | |
181 | if (!e) { | |
182 | write_unlock(&nm_i->nat_tree_lock); | |
183 | goto retry; | |
184 | } | |
185 | nat_set_blkaddr(e, le32_to_cpu(ne->block_addr)); | |
186 | nat_set_ino(e, le32_to_cpu(ne->ino)); | |
187 | nat_set_version(e, ne->version); | |
188 | e->checkpointed = true; | |
189 | } | |
190 | write_unlock(&nm_i->nat_tree_lock); | |
191 | } | |
192 | ||
193 | static void set_node_addr(struct f2fs_sb_info *sbi, struct node_info *ni, | |
194 | block_t new_blkaddr) | |
195 | { | |
196 | struct f2fs_nm_info *nm_i = NM_I(sbi); | |
197 | struct nat_entry *e; | |
198 | retry: | |
199 | write_lock(&nm_i->nat_tree_lock); | |
200 | e = __lookup_nat_cache(nm_i, ni->nid); | |
201 | if (!e) { | |
202 | e = grab_nat_entry(nm_i, ni->nid); | |
203 | if (!e) { | |
204 | write_unlock(&nm_i->nat_tree_lock); | |
205 | goto retry; | |
206 | } | |
207 | e->ni = *ni; | |
208 | e->checkpointed = true; | |
5d56b671 | 209 | f2fs_bug_on(ni->blk_addr == NEW_ADDR); |
e05df3b1 JK |
210 | } else if (new_blkaddr == NEW_ADDR) { |
211 | /* | |
212 | * when nid is reallocated, | |
213 | * previous nat entry can be remained in nat cache. | |
214 | * So, reinitialize it with new information. | |
215 | */ | |
216 | e->ni = *ni; | |
5d56b671 | 217 | f2fs_bug_on(ni->blk_addr != NULL_ADDR); |
e05df3b1 JK |
218 | } |
219 | ||
220 | if (new_blkaddr == NEW_ADDR) | |
221 | e->checkpointed = false; | |
222 | ||
223 | /* sanity check */ | |
5d56b671 JK |
224 | f2fs_bug_on(nat_get_blkaddr(e) != ni->blk_addr); |
225 | f2fs_bug_on(nat_get_blkaddr(e) == NULL_ADDR && | |
e05df3b1 | 226 | new_blkaddr == NULL_ADDR); |
5d56b671 | 227 | f2fs_bug_on(nat_get_blkaddr(e) == NEW_ADDR && |
e05df3b1 | 228 | new_blkaddr == NEW_ADDR); |
5d56b671 | 229 | f2fs_bug_on(nat_get_blkaddr(e) != NEW_ADDR && |
e05df3b1 JK |
230 | nat_get_blkaddr(e) != NULL_ADDR && |
231 | new_blkaddr == NEW_ADDR); | |
232 | ||
233 | /* increament version no as node is removed */ | |
234 | if (nat_get_blkaddr(e) != NEW_ADDR && new_blkaddr == NULL_ADDR) { | |
235 | unsigned char version = nat_get_version(e); | |
236 | nat_set_version(e, inc_node_version(version)); | |
237 | } | |
238 | ||
239 | /* change address */ | |
240 | nat_set_blkaddr(e, new_blkaddr); | |
241 | __set_nat_cache_dirty(nm_i, e); | |
242 | write_unlock(&nm_i->nat_tree_lock); | |
243 | } | |
244 | ||
4660f9c0 | 245 | int try_to_free_nats(struct f2fs_sb_info *sbi, int nr_shrink) |
e05df3b1 JK |
246 | { |
247 | struct f2fs_nm_info *nm_i = NM_I(sbi); | |
248 | ||
6cac3759 | 249 | if (nm_i->nat_cnt <= NM_WOUT_THRESHOLD) |
e05df3b1 JK |
250 | return 0; |
251 | ||
252 | write_lock(&nm_i->nat_tree_lock); | |
253 | while (nr_shrink && !list_empty(&nm_i->nat_entries)) { | |
254 | struct nat_entry *ne; | |
255 | ne = list_first_entry(&nm_i->nat_entries, | |
256 | struct nat_entry, list); | |
257 | __del_from_nat_cache(nm_i, ne); | |
258 | nr_shrink--; | |
259 | } | |
260 | write_unlock(&nm_i->nat_tree_lock); | |
261 | return nr_shrink; | |
262 | } | |
263 | ||
0a8165d7 | 264 | /* |
e05df3b1 JK |
265 | * This function returns always success |
266 | */ | |
267 | void get_node_info(struct f2fs_sb_info *sbi, nid_t nid, struct node_info *ni) | |
268 | { | |
269 | struct f2fs_nm_info *nm_i = NM_I(sbi); | |
270 | struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); | |
271 | struct f2fs_summary_block *sum = curseg->sum_blk; | |
272 | nid_t start_nid = START_NID(nid); | |
273 | struct f2fs_nat_block *nat_blk; | |
274 | struct page *page = NULL; | |
275 | struct f2fs_nat_entry ne; | |
276 | struct nat_entry *e; | |
277 | int i; | |
278 | ||
be4124f8 | 279 | memset(&ne, 0, sizeof(struct f2fs_nat_entry)); |
e05df3b1 JK |
280 | ni->nid = nid; |
281 | ||
282 | /* Check nat cache */ | |
283 | read_lock(&nm_i->nat_tree_lock); | |
284 | e = __lookup_nat_cache(nm_i, nid); | |
285 | if (e) { | |
286 | ni->ino = nat_get_ino(e); | |
287 | ni->blk_addr = nat_get_blkaddr(e); | |
288 | ni->version = nat_get_version(e); | |
289 | } | |
290 | read_unlock(&nm_i->nat_tree_lock); | |
291 | if (e) | |
292 | return; | |
293 | ||
294 | /* Check current segment summary */ | |
295 | mutex_lock(&curseg->curseg_mutex); | |
296 | i = lookup_journal_in_cursum(sum, NAT_JOURNAL, nid, 0); | |
297 | if (i >= 0) { | |
298 | ne = nat_in_journal(sum, i); | |
299 | node_info_from_raw_nat(ni, &ne); | |
300 | } | |
301 | mutex_unlock(&curseg->curseg_mutex); | |
302 | if (i >= 0) | |
303 | goto cache; | |
304 | ||
305 | /* Fill node_info from nat page */ | |
306 | page = get_current_nat_page(sbi, start_nid); | |
307 | nat_blk = (struct f2fs_nat_block *)page_address(page); | |
308 | ne = nat_blk->entries[nid - start_nid]; | |
309 | node_info_from_raw_nat(ni, &ne); | |
310 | f2fs_put_page(page, 1); | |
311 | cache: | |
312 | /* cache nat entry */ | |
313 | cache_nat_entry(NM_I(sbi), nid, &ne); | |
314 | } | |
315 | ||
0a8165d7 | 316 | /* |
e05df3b1 JK |
317 | * The maximum depth is four. |
318 | * Offset[0] will have raw inode offset. | |
319 | */ | |
de93653f JK |
320 | static int get_node_path(struct f2fs_inode_info *fi, long block, |
321 | int offset[4], unsigned int noffset[4]) | |
e05df3b1 | 322 | { |
de93653f | 323 | const long direct_index = ADDRS_PER_INODE(fi); |
e05df3b1 JK |
324 | const long direct_blks = ADDRS_PER_BLOCK; |
325 | const long dptrs_per_blk = NIDS_PER_BLOCK; | |
326 | const long indirect_blks = ADDRS_PER_BLOCK * NIDS_PER_BLOCK; | |
327 | const long dindirect_blks = indirect_blks * NIDS_PER_BLOCK; | |
328 | int n = 0; | |
329 | int level = 0; | |
330 | ||
331 | noffset[0] = 0; | |
332 | ||
333 | if (block < direct_index) { | |
25c0a6e5 | 334 | offset[n] = block; |
e05df3b1 JK |
335 | goto got; |
336 | } | |
337 | block -= direct_index; | |
338 | if (block < direct_blks) { | |
339 | offset[n++] = NODE_DIR1_BLOCK; | |
340 | noffset[n] = 1; | |
25c0a6e5 | 341 | offset[n] = block; |
e05df3b1 JK |
342 | level = 1; |
343 | goto got; | |
344 | } | |
345 | block -= direct_blks; | |
346 | if (block < direct_blks) { | |
347 | offset[n++] = NODE_DIR2_BLOCK; | |
348 | noffset[n] = 2; | |
25c0a6e5 | 349 | offset[n] = block; |
e05df3b1 JK |
350 | level = 1; |
351 | goto got; | |
352 | } | |
353 | block -= direct_blks; | |
354 | if (block < indirect_blks) { | |
355 | offset[n++] = NODE_IND1_BLOCK; | |
356 | noffset[n] = 3; | |
357 | offset[n++] = block / direct_blks; | |
358 | noffset[n] = 4 + offset[n - 1]; | |
25c0a6e5 | 359 | offset[n] = block % direct_blks; |
e05df3b1 JK |
360 | level = 2; |
361 | goto got; | |
362 | } | |
363 | block -= indirect_blks; | |
364 | if (block < indirect_blks) { | |
365 | offset[n++] = NODE_IND2_BLOCK; | |
366 | noffset[n] = 4 + dptrs_per_blk; | |
367 | offset[n++] = block / direct_blks; | |
368 | noffset[n] = 5 + dptrs_per_blk + offset[n - 1]; | |
25c0a6e5 | 369 | offset[n] = block % direct_blks; |
e05df3b1 JK |
370 | level = 2; |
371 | goto got; | |
372 | } | |
373 | block -= indirect_blks; | |
374 | if (block < dindirect_blks) { | |
375 | offset[n++] = NODE_DIND_BLOCK; | |
376 | noffset[n] = 5 + (dptrs_per_blk * 2); | |
377 | offset[n++] = block / indirect_blks; | |
378 | noffset[n] = 6 + (dptrs_per_blk * 2) + | |
379 | offset[n - 1] * (dptrs_per_blk + 1); | |
380 | offset[n++] = (block / direct_blks) % dptrs_per_blk; | |
381 | noffset[n] = 7 + (dptrs_per_blk * 2) + | |
382 | offset[n - 2] * (dptrs_per_blk + 1) + | |
383 | offset[n - 1]; | |
25c0a6e5 | 384 | offset[n] = block % direct_blks; |
e05df3b1 JK |
385 | level = 3; |
386 | goto got; | |
387 | } else { | |
388 | BUG(); | |
389 | } | |
390 | got: | |
391 | return level; | |
392 | } | |
393 | ||
394 | /* | |
395 | * Caller should call f2fs_put_dnode(dn). | |
4f4124d0 CY |
396 | * Also, it should grab and release a rwsem by calling f2fs_lock_op() and |
397 | * f2fs_unlock_op() only if ro is not set RDONLY_NODE. | |
39936837 | 398 | * In the case of RDONLY_NODE, we don't need to care about mutex. |
e05df3b1 | 399 | */ |
266e97a8 | 400 | int get_dnode_of_data(struct dnode_of_data *dn, pgoff_t index, int mode) |
e05df3b1 JK |
401 | { |
402 | struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); | |
403 | struct page *npage[4]; | |
404 | struct page *parent; | |
405 | int offset[4]; | |
406 | unsigned int noffset[4]; | |
407 | nid_t nids[4]; | |
408 | int level, i; | |
409 | int err = 0; | |
410 | ||
de93653f | 411 | level = get_node_path(F2FS_I(dn->inode), index, offset, noffset); |
e05df3b1 JK |
412 | |
413 | nids[0] = dn->inode->i_ino; | |
1646cfac | 414 | npage[0] = dn->inode_page; |
e05df3b1 | 415 | |
1646cfac JK |
416 | if (!npage[0]) { |
417 | npage[0] = get_node_page(sbi, nids[0]); | |
418 | if (IS_ERR(npage[0])) | |
419 | return PTR_ERR(npage[0]); | |
420 | } | |
e05df3b1 | 421 | parent = npage[0]; |
52c2db3f CL |
422 | if (level != 0) |
423 | nids[1] = get_nid(parent, offset[0], true); | |
e05df3b1 JK |
424 | dn->inode_page = npage[0]; |
425 | dn->inode_page_locked = true; | |
426 | ||
427 | /* get indirect or direct nodes */ | |
428 | for (i = 1; i <= level; i++) { | |
429 | bool done = false; | |
430 | ||
266e97a8 | 431 | if (!nids[i] && mode == ALLOC_NODE) { |
e05df3b1 JK |
432 | /* alloc new node */ |
433 | if (!alloc_nid(sbi, &(nids[i]))) { | |
e05df3b1 JK |
434 | err = -ENOSPC; |
435 | goto release_pages; | |
436 | } | |
437 | ||
438 | dn->nid = nids[i]; | |
8ae8f162 | 439 | npage[i] = new_node_page(dn, noffset[i], NULL); |
e05df3b1 JK |
440 | if (IS_ERR(npage[i])) { |
441 | alloc_nid_failed(sbi, nids[i]); | |
e05df3b1 JK |
442 | err = PTR_ERR(npage[i]); |
443 | goto release_pages; | |
444 | } | |
445 | ||
446 | set_nid(parent, offset[i - 1], nids[i], i == 1); | |
447 | alloc_nid_done(sbi, nids[i]); | |
e05df3b1 | 448 | done = true; |
266e97a8 | 449 | } else if (mode == LOOKUP_NODE_RA && i == level && level > 1) { |
e05df3b1 JK |
450 | npage[i] = get_node_page_ra(parent, offset[i - 1]); |
451 | if (IS_ERR(npage[i])) { | |
452 | err = PTR_ERR(npage[i]); | |
453 | goto release_pages; | |
454 | } | |
455 | done = true; | |
456 | } | |
457 | if (i == 1) { | |
458 | dn->inode_page_locked = false; | |
459 | unlock_page(parent); | |
460 | } else { | |
461 | f2fs_put_page(parent, 1); | |
462 | } | |
463 | ||
464 | if (!done) { | |
465 | npage[i] = get_node_page(sbi, nids[i]); | |
466 | if (IS_ERR(npage[i])) { | |
467 | err = PTR_ERR(npage[i]); | |
468 | f2fs_put_page(npage[0], 0); | |
469 | goto release_out; | |
470 | } | |
471 | } | |
472 | if (i < level) { | |
473 | parent = npage[i]; | |
474 | nids[i + 1] = get_nid(parent, offset[i], false); | |
475 | } | |
476 | } | |
477 | dn->nid = nids[level]; | |
478 | dn->ofs_in_node = offset[level]; | |
479 | dn->node_page = npage[level]; | |
480 | dn->data_blkaddr = datablock_addr(dn->node_page, dn->ofs_in_node); | |
481 | return 0; | |
482 | ||
483 | release_pages: | |
484 | f2fs_put_page(parent, 1); | |
485 | if (i > 1) | |
486 | f2fs_put_page(npage[0], 0); | |
487 | release_out: | |
488 | dn->inode_page = NULL; | |
489 | dn->node_page = NULL; | |
490 | return err; | |
491 | } | |
492 | ||
493 | static void truncate_node(struct dnode_of_data *dn) | |
494 | { | |
495 | struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); | |
496 | struct node_info ni; | |
497 | ||
498 | get_node_info(sbi, dn->nid, &ni); | |
71e9fec5 | 499 | if (dn->inode->i_blocks == 0) { |
5d56b671 | 500 | f2fs_bug_on(ni.blk_addr != NULL_ADDR); |
71e9fec5 JK |
501 | goto invalidate; |
502 | } | |
5d56b671 | 503 | f2fs_bug_on(ni.blk_addr == NULL_ADDR); |
e05df3b1 | 504 | |
e05df3b1 | 505 | /* Deallocate node address */ |
71e9fec5 | 506 | invalidate_blocks(sbi, ni.blk_addr); |
ef86d709 | 507 | dec_valid_node_count(sbi, dn->inode); |
e05df3b1 JK |
508 | set_node_addr(sbi, &ni, NULL_ADDR); |
509 | ||
510 | if (dn->nid == dn->inode->i_ino) { | |
511 | remove_orphan_inode(sbi, dn->nid); | |
512 | dec_valid_inode_count(sbi); | |
513 | } else { | |
514 | sync_inode_page(dn); | |
515 | } | |
71e9fec5 | 516 | invalidate: |
e05df3b1 JK |
517 | clear_node_page_dirty(dn->node_page); |
518 | F2FS_SET_SB_DIRT(sbi); | |
519 | ||
520 | f2fs_put_page(dn->node_page, 1); | |
bf39c00a JK |
521 | |
522 | invalidate_mapping_pages(NODE_MAPPING(sbi), | |
523 | dn->node_page->index, dn->node_page->index); | |
524 | ||
e05df3b1 | 525 | dn->node_page = NULL; |
51dd6249 | 526 | trace_f2fs_truncate_node(dn->inode, dn->nid, ni.blk_addr); |
e05df3b1 JK |
527 | } |
528 | ||
529 | static int truncate_dnode(struct dnode_of_data *dn) | |
530 | { | |
531 | struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); | |
532 | struct page *page; | |
533 | ||
534 | if (dn->nid == 0) | |
535 | return 1; | |
536 | ||
537 | /* get direct node */ | |
538 | page = get_node_page(sbi, dn->nid); | |
539 | if (IS_ERR(page) && PTR_ERR(page) == -ENOENT) | |
540 | return 1; | |
541 | else if (IS_ERR(page)) | |
542 | return PTR_ERR(page); | |
543 | ||
544 | /* Make dnode_of_data for parameter */ | |
545 | dn->node_page = page; | |
546 | dn->ofs_in_node = 0; | |
547 | truncate_data_blocks(dn); | |
548 | truncate_node(dn); | |
549 | return 1; | |
550 | } | |
551 | ||
552 | static int truncate_nodes(struct dnode_of_data *dn, unsigned int nofs, | |
553 | int ofs, int depth) | |
554 | { | |
555 | struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); | |
556 | struct dnode_of_data rdn = *dn; | |
557 | struct page *page; | |
558 | struct f2fs_node *rn; | |
559 | nid_t child_nid; | |
560 | unsigned int child_nofs; | |
561 | int freed = 0; | |
562 | int i, ret; | |
563 | ||
564 | if (dn->nid == 0) | |
565 | return NIDS_PER_BLOCK + 1; | |
566 | ||
51dd6249 NJ |
567 | trace_f2fs_truncate_nodes_enter(dn->inode, dn->nid, dn->data_blkaddr); |
568 | ||
e05df3b1 | 569 | page = get_node_page(sbi, dn->nid); |
51dd6249 NJ |
570 | if (IS_ERR(page)) { |
571 | trace_f2fs_truncate_nodes_exit(dn->inode, PTR_ERR(page)); | |
e05df3b1 | 572 | return PTR_ERR(page); |
51dd6249 | 573 | } |
e05df3b1 | 574 | |
45590710 | 575 | rn = F2FS_NODE(page); |
e05df3b1 JK |
576 | if (depth < 3) { |
577 | for (i = ofs; i < NIDS_PER_BLOCK; i++, freed++) { | |
578 | child_nid = le32_to_cpu(rn->in.nid[i]); | |
579 | if (child_nid == 0) | |
580 | continue; | |
581 | rdn.nid = child_nid; | |
582 | ret = truncate_dnode(&rdn); | |
583 | if (ret < 0) | |
584 | goto out_err; | |
585 | set_nid(page, i, 0, false); | |
586 | } | |
587 | } else { | |
588 | child_nofs = nofs + ofs * (NIDS_PER_BLOCK + 1) + 1; | |
589 | for (i = ofs; i < NIDS_PER_BLOCK; i++) { | |
590 | child_nid = le32_to_cpu(rn->in.nid[i]); | |
591 | if (child_nid == 0) { | |
592 | child_nofs += NIDS_PER_BLOCK + 1; | |
593 | continue; | |
594 | } | |
595 | rdn.nid = child_nid; | |
596 | ret = truncate_nodes(&rdn, child_nofs, 0, depth - 1); | |
597 | if (ret == (NIDS_PER_BLOCK + 1)) { | |
598 | set_nid(page, i, 0, false); | |
599 | child_nofs += ret; | |
600 | } else if (ret < 0 && ret != -ENOENT) { | |
601 | goto out_err; | |
602 | } | |
603 | } | |
604 | freed = child_nofs; | |
605 | } | |
606 | ||
607 | if (!ofs) { | |
608 | /* remove current indirect node */ | |
609 | dn->node_page = page; | |
610 | truncate_node(dn); | |
611 | freed++; | |
612 | } else { | |
613 | f2fs_put_page(page, 1); | |
614 | } | |
51dd6249 | 615 | trace_f2fs_truncate_nodes_exit(dn->inode, freed); |
e05df3b1 JK |
616 | return freed; |
617 | ||
618 | out_err: | |
619 | f2fs_put_page(page, 1); | |
51dd6249 | 620 | trace_f2fs_truncate_nodes_exit(dn->inode, ret); |
e05df3b1 JK |
621 | return ret; |
622 | } | |
623 | ||
624 | static int truncate_partial_nodes(struct dnode_of_data *dn, | |
625 | struct f2fs_inode *ri, int *offset, int depth) | |
626 | { | |
627 | struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); | |
628 | struct page *pages[2]; | |
629 | nid_t nid[3]; | |
630 | nid_t child_nid; | |
631 | int err = 0; | |
632 | int i; | |
633 | int idx = depth - 2; | |
634 | ||
635 | nid[0] = le32_to_cpu(ri->i_nid[offset[0] - NODE_DIR1_BLOCK]); | |
636 | if (!nid[0]) | |
637 | return 0; | |
638 | ||
639 | /* get indirect nodes in the path */ | |
a225dca3 | 640 | for (i = 0; i < idx + 1; i++) { |
e05df3b1 JK |
641 | /* refernece count'll be increased */ |
642 | pages[i] = get_node_page(sbi, nid[i]); | |
643 | if (IS_ERR(pages[i])) { | |
e05df3b1 | 644 | err = PTR_ERR(pages[i]); |
a225dca3 | 645 | idx = i - 1; |
e05df3b1 JK |
646 | goto fail; |
647 | } | |
648 | nid[i + 1] = get_nid(pages[i], offset[i + 1], false); | |
649 | } | |
650 | ||
651 | /* free direct nodes linked to a partial indirect node */ | |
a225dca3 | 652 | for (i = offset[idx + 1]; i < NIDS_PER_BLOCK; i++) { |
e05df3b1 JK |
653 | child_nid = get_nid(pages[idx], i, false); |
654 | if (!child_nid) | |
655 | continue; | |
656 | dn->nid = child_nid; | |
657 | err = truncate_dnode(dn); | |
658 | if (err < 0) | |
659 | goto fail; | |
660 | set_nid(pages[idx], i, 0, false); | |
661 | } | |
662 | ||
a225dca3 | 663 | if (offset[idx + 1] == 0) { |
e05df3b1 JK |
664 | dn->node_page = pages[idx]; |
665 | dn->nid = nid[idx]; | |
666 | truncate_node(dn); | |
667 | } else { | |
668 | f2fs_put_page(pages[idx], 1); | |
669 | } | |
670 | offset[idx]++; | |
a225dca3 | 671 | offset[idx + 1] = 0; |
672 | idx--; | |
e05df3b1 | 673 | fail: |
a225dca3 | 674 | for (i = idx; i >= 0; i--) |
e05df3b1 | 675 | f2fs_put_page(pages[i], 1); |
51dd6249 NJ |
676 | |
677 | trace_f2fs_truncate_partial_nodes(dn->inode, nid, depth, err); | |
678 | ||
e05df3b1 JK |
679 | return err; |
680 | } | |
681 | ||
0a8165d7 | 682 | /* |
e05df3b1 JK |
683 | * All the block addresses of data and nodes should be nullified. |
684 | */ | |
685 | int truncate_inode_blocks(struct inode *inode, pgoff_t from) | |
686 | { | |
687 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
688 | int err = 0, cont = 1; | |
689 | int level, offset[4], noffset[4]; | |
7dd690c8 | 690 | unsigned int nofs = 0; |
58bfaf44 | 691 | struct f2fs_inode *ri; |
e05df3b1 JK |
692 | struct dnode_of_data dn; |
693 | struct page *page; | |
694 | ||
51dd6249 NJ |
695 | trace_f2fs_truncate_inode_blocks_enter(inode, from); |
696 | ||
de93653f | 697 | level = get_node_path(F2FS_I(inode), from, offset, noffset); |
afcb7ca0 | 698 | restart: |
e05df3b1 | 699 | page = get_node_page(sbi, inode->i_ino); |
51dd6249 NJ |
700 | if (IS_ERR(page)) { |
701 | trace_f2fs_truncate_inode_blocks_exit(inode, PTR_ERR(page)); | |
e05df3b1 | 702 | return PTR_ERR(page); |
51dd6249 | 703 | } |
e05df3b1 JK |
704 | |
705 | set_new_dnode(&dn, inode, page, NULL, 0); | |
706 | unlock_page(page); | |
707 | ||
58bfaf44 | 708 | ri = F2FS_INODE(page); |
e05df3b1 JK |
709 | switch (level) { |
710 | case 0: | |
711 | case 1: | |
712 | nofs = noffset[1]; | |
713 | break; | |
714 | case 2: | |
715 | nofs = noffset[1]; | |
716 | if (!offset[level - 1]) | |
717 | goto skip_partial; | |
58bfaf44 | 718 | err = truncate_partial_nodes(&dn, ri, offset, level); |
e05df3b1 JK |
719 | if (err < 0 && err != -ENOENT) |
720 | goto fail; | |
721 | nofs += 1 + NIDS_PER_BLOCK; | |
722 | break; | |
723 | case 3: | |
724 | nofs = 5 + 2 * NIDS_PER_BLOCK; | |
725 | if (!offset[level - 1]) | |
726 | goto skip_partial; | |
58bfaf44 | 727 | err = truncate_partial_nodes(&dn, ri, offset, level); |
e05df3b1 JK |
728 | if (err < 0 && err != -ENOENT) |
729 | goto fail; | |
730 | break; | |
731 | default: | |
732 | BUG(); | |
733 | } | |
734 | ||
735 | skip_partial: | |
736 | while (cont) { | |
58bfaf44 | 737 | dn.nid = le32_to_cpu(ri->i_nid[offset[0] - NODE_DIR1_BLOCK]); |
e05df3b1 JK |
738 | switch (offset[0]) { |
739 | case NODE_DIR1_BLOCK: | |
740 | case NODE_DIR2_BLOCK: | |
741 | err = truncate_dnode(&dn); | |
742 | break; | |
743 | ||
744 | case NODE_IND1_BLOCK: | |
745 | case NODE_IND2_BLOCK: | |
746 | err = truncate_nodes(&dn, nofs, offset[1], 2); | |
747 | break; | |
748 | ||
749 | case NODE_DIND_BLOCK: | |
750 | err = truncate_nodes(&dn, nofs, offset[1], 3); | |
751 | cont = 0; | |
752 | break; | |
753 | ||
754 | default: | |
755 | BUG(); | |
756 | } | |
757 | if (err < 0 && err != -ENOENT) | |
758 | goto fail; | |
759 | if (offset[1] == 0 && | |
58bfaf44 | 760 | ri->i_nid[offset[0] - NODE_DIR1_BLOCK]) { |
e05df3b1 | 761 | lock_page(page); |
4ef51a8f | 762 | if (unlikely(page->mapping != NODE_MAPPING(sbi))) { |
afcb7ca0 JK |
763 | f2fs_put_page(page, 1); |
764 | goto restart; | |
765 | } | |
e05df3b1 | 766 | wait_on_page_writeback(page); |
58bfaf44 | 767 | ri->i_nid[offset[0] - NODE_DIR1_BLOCK] = 0; |
e05df3b1 JK |
768 | set_page_dirty(page); |
769 | unlock_page(page); | |
770 | } | |
771 | offset[1] = 0; | |
772 | offset[0]++; | |
773 | nofs += err; | |
774 | } | |
775 | fail: | |
776 | f2fs_put_page(page, 0); | |
51dd6249 | 777 | trace_f2fs_truncate_inode_blocks_exit(inode, err); |
e05df3b1 JK |
778 | return err > 0 ? 0 : err; |
779 | } | |
780 | ||
4f16fb0f JK |
781 | int truncate_xattr_node(struct inode *inode, struct page *page) |
782 | { | |
783 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
784 | nid_t nid = F2FS_I(inode)->i_xattr_nid; | |
785 | struct dnode_of_data dn; | |
786 | struct page *npage; | |
787 | ||
788 | if (!nid) | |
789 | return 0; | |
790 | ||
791 | npage = get_node_page(sbi, nid); | |
792 | if (IS_ERR(npage)) | |
793 | return PTR_ERR(npage); | |
794 | ||
795 | F2FS_I(inode)->i_xattr_nid = 0; | |
65985d93 JK |
796 | |
797 | /* need to do checkpoint during fsync */ | |
798 | F2FS_I(inode)->xattr_ver = cur_cp_version(F2FS_CKPT(sbi)); | |
799 | ||
4f16fb0f JK |
800 | set_new_dnode(&dn, inode, page, npage, nid); |
801 | ||
802 | if (page) | |
01d2d1aa | 803 | dn.inode_page_locked = true; |
4f16fb0f JK |
804 | truncate_node(&dn); |
805 | return 0; | |
806 | } | |
807 | ||
39936837 | 808 | /* |
4f4124d0 CY |
809 | * Caller should grab and release a rwsem by calling f2fs_lock_op() and |
810 | * f2fs_unlock_op(). | |
39936837 | 811 | */ |
58e674d6 | 812 | void remove_inode_page(struct inode *inode) |
e05df3b1 JK |
813 | { |
814 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
815 | struct page *page; | |
816 | nid_t ino = inode->i_ino; | |
817 | struct dnode_of_data dn; | |
818 | ||
e05df3b1 | 819 | page = get_node_page(sbi, ino); |
39936837 | 820 | if (IS_ERR(page)) |
58e674d6 | 821 | return; |
e05df3b1 | 822 | |
58e674d6 | 823 | if (truncate_xattr_node(inode, page)) { |
4f16fb0f | 824 | f2fs_put_page(page, 1); |
58e674d6 | 825 | return; |
e05df3b1 | 826 | } |
71e9fec5 | 827 | /* 0 is possible, after f2fs_new_inode() is failed */ |
5d56b671 | 828 | f2fs_bug_on(inode->i_blocks != 0 && inode->i_blocks != 1); |
71e9fec5 JK |
829 | set_new_dnode(&dn, inode, page, page, ino); |
830 | truncate_node(&dn); | |
e05df3b1 JK |
831 | } |
832 | ||
44a83ff6 | 833 | struct page *new_inode_page(struct inode *inode, const struct qstr *name) |
e05df3b1 | 834 | { |
e05df3b1 JK |
835 | struct dnode_of_data dn; |
836 | ||
837 | /* allocate inode page for new inode */ | |
838 | set_new_dnode(&dn, inode, NULL, NULL, inode->i_ino); | |
44a83ff6 JK |
839 | |
840 | /* caller should f2fs_put_page(page, 1); */ | |
8ae8f162 | 841 | return new_node_page(&dn, 0, NULL); |
e05df3b1 JK |
842 | } |
843 | ||
8ae8f162 JK |
844 | struct page *new_node_page(struct dnode_of_data *dn, |
845 | unsigned int ofs, struct page *ipage) | |
e05df3b1 JK |
846 | { |
847 | struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); | |
e05df3b1 JK |
848 | struct node_info old_ni, new_ni; |
849 | struct page *page; | |
850 | int err; | |
851 | ||
6bacf52f | 852 | if (unlikely(is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC))) |
e05df3b1 JK |
853 | return ERR_PTR(-EPERM); |
854 | ||
4ef51a8f | 855 | page = grab_cache_page(NODE_MAPPING(sbi), dn->nid); |
e05df3b1 JK |
856 | if (!page) |
857 | return ERR_PTR(-ENOMEM); | |
858 | ||
6bacf52f | 859 | if (unlikely(!inc_valid_node_count(sbi, dn->inode))) { |
9c02740c JK |
860 | err = -ENOSPC; |
861 | goto fail; | |
862 | } | |
e05df3b1 | 863 | |
9c02740c | 864 | get_node_info(sbi, dn->nid, &old_ni); |
e05df3b1 JK |
865 | |
866 | /* Reinitialize old_ni with new node page */ | |
5d56b671 | 867 | f2fs_bug_on(old_ni.blk_addr != NULL_ADDR); |
e05df3b1 JK |
868 | new_ni = old_ni; |
869 | new_ni.ino = dn->inode->i_ino; | |
e05df3b1 | 870 | set_node_addr(sbi, &new_ni, NEW_ADDR); |
9c02740c JK |
871 | |
872 | fill_node_footer(page, dn->nid, dn->inode->i_ino, ofs, true); | |
398b1ac5 | 873 | set_cold_node(dn->inode, page); |
9c02740c JK |
874 | SetPageUptodate(page); |
875 | set_page_dirty(page); | |
e05df3b1 | 876 | |
479bd73a JK |
877 | if (ofs == XATTR_NODE_OFFSET) |
878 | F2FS_I(dn->inode)->i_xattr_nid = dn->nid; | |
879 | ||
e05df3b1 | 880 | dn->node_page = page; |
8ae8f162 JK |
881 | if (ipage) |
882 | update_inode(dn->inode, ipage); | |
883 | else | |
884 | sync_inode_page(dn); | |
e05df3b1 JK |
885 | if (ofs == 0) |
886 | inc_valid_inode_count(sbi); | |
887 | ||
888 | return page; | |
889 | ||
890 | fail: | |
71e9fec5 | 891 | clear_node_page_dirty(page); |
e05df3b1 JK |
892 | f2fs_put_page(page, 1); |
893 | return ERR_PTR(err); | |
894 | } | |
895 | ||
56ae674c JK |
896 | /* |
897 | * Caller should do after getting the following values. | |
898 | * 0: f2fs_put_page(page, 0) | |
899 | * LOCKED_PAGE: f2fs_put_page(page, 1) | |
900 | * error: nothing | |
901 | */ | |
93dfe2ac | 902 | static int read_node_page(struct page *page, int rw) |
e05df3b1 JK |
903 | { |
904 | struct f2fs_sb_info *sbi = F2FS_SB(page->mapping->host->i_sb); | |
905 | struct node_info ni; | |
906 | ||
907 | get_node_info(sbi, page->index, &ni); | |
908 | ||
6bacf52f | 909 | if (unlikely(ni.blk_addr == NULL_ADDR)) { |
393ff91f | 910 | f2fs_put_page(page, 1); |
e05df3b1 | 911 | return -ENOENT; |
393ff91f JK |
912 | } |
913 | ||
56ae674c JK |
914 | if (PageUptodate(page)) |
915 | return LOCKED_PAGE; | |
393ff91f | 916 | |
93dfe2ac | 917 | return f2fs_submit_page_bio(sbi, page, ni.blk_addr, rw); |
e05df3b1 JK |
918 | } |
919 | ||
0a8165d7 | 920 | /* |
e05df3b1 JK |
921 | * Readahead a node page |
922 | */ | |
923 | void ra_node_page(struct f2fs_sb_info *sbi, nid_t nid) | |
924 | { | |
e05df3b1 | 925 | struct page *apage; |
56ae674c | 926 | int err; |
e05df3b1 | 927 | |
4ef51a8f | 928 | apage = find_get_page(NODE_MAPPING(sbi), nid); |
393ff91f JK |
929 | if (apage && PageUptodate(apage)) { |
930 | f2fs_put_page(apage, 0); | |
931 | return; | |
932 | } | |
e05df3b1 JK |
933 | f2fs_put_page(apage, 0); |
934 | ||
4ef51a8f | 935 | apage = grab_cache_page(NODE_MAPPING(sbi), nid); |
e05df3b1 JK |
936 | if (!apage) |
937 | return; | |
938 | ||
56ae674c JK |
939 | err = read_node_page(apage, READA); |
940 | if (err == 0) | |
393ff91f | 941 | f2fs_put_page(apage, 0); |
56ae674c JK |
942 | else if (err == LOCKED_PAGE) |
943 | f2fs_put_page(apage, 1); | |
e05df3b1 JK |
944 | } |
945 | ||
946 | struct page *get_node_page(struct f2fs_sb_info *sbi, pgoff_t nid) | |
947 | { | |
56ae674c JK |
948 | struct page *page; |
949 | int err; | |
afcb7ca0 | 950 | repeat: |
4ef51a8f | 951 | page = grab_cache_page(NODE_MAPPING(sbi), nid); |
e05df3b1 JK |
952 | if (!page) |
953 | return ERR_PTR(-ENOMEM); | |
954 | ||
955 | err = read_node_page(page, READ_SYNC); | |
56ae674c | 956 | if (err < 0) |
e05df3b1 | 957 | return ERR_PTR(err); |
56ae674c JK |
958 | else if (err == LOCKED_PAGE) |
959 | goto got_it; | |
e05df3b1 | 960 | |
393ff91f | 961 | lock_page(page); |
6bacf52f | 962 | if (unlikely(!PageUptodate(page))) { |
393ff91f JK |
963 | f2fs_put_page(page, 1); |
964 | return ERR_PTR(-EIO); | |
965 | } | |
4ef51a8f | 966 | if (unlikely(page->mapping != NODE_MAPPING(sbi))) { |
afcb7ca0 JK |
967 | f2fs_put_page(page, 1); |
968 | goto repeat; | |
969 | } | |
56ae674c | 970 | got_it: |
5d56b671 | 971 | f2fs_bug_on(nid != nid_of_node(page)); |
e05df3b1 JK |
972 | mark_page_accessed(page); |
973 | return page; | |
974 | } | |
975 | ||
0a8165d7 | 976 | /* |
e05df3b1 JK |
977 | * Return a locked page for the desired node page. |
978 | * And, readahead MAX_RA_NODE number of node pages. | |
979 | */ | |
980 | struct page *get_node_page_ra(struct page *parent, int start) | |
981 | { | |
982 | struct f2fs_sb_info *sbi = F2FS_SB(parent->mapping->host->i_sb); | |
c718379b | 983 | struct blk_plug plug; |
e05df3b1 | 984 | struct page *page; |
56ae674c JK |
985 | int err, i, end; |
986 | nid_t nid; | |
e05df3b1 JK |
987 | |
988 | /* First, try getting the desired direct node. */ | |
989 | nid = get_nid(parent, start, false); | |
990 | if (!nid) | |
991 | return ERR_PTR(-ENOENT); | |
afcb7ca0 | 992 | repeat: |
4ef51a8f | 993 | page = grab_cache_page(NODE_MAPPING(sbi), nid); |
e05df3b1 JK |
994 | if (!page) |
995 | return ERR_PTR(-ENOMEM); | |
996 | ||
66d36a29 | 997 | err = read_node_page(page, READ_SYNC); |
56ae674c | 998 | if (err < 0) |
e05df3b1 | 999 | return ERR_PTR(err); |
56ae674c JK |
1000 | else if (err == LOCKED_PAGE) |
1001 | goto page_hit; | |
e05df3b1 | 1002 | |
c718379b JK |
1003 | blk_start_plug(&plug); |
1004 | ||
e05df3b1 JK |
1005 | /* Then, try readahead for siblings of the desired node */ |
1006 | end = start + MAX_RA_NODE; | |
1007 | end = min(end, NIDS_PER_BLOCK); | |
1008 | for (i = start + 1; i < end; i++) { | |
1009 | nid = get_nid(parent, i, false); | |
1010 | if (!nid) | |
1011 | continue; | |
1012 | ra_node_page(sbi, nid); | |
1013 | } | |
1014 | ||
c718379b JK |
1015 | blk_finish_plug(&plug); |
1016 | ||
e05df3b1 | 1017 | lock_page(page); |
4ef51a8f | 1018 | if (unlikely(page->mapping != NODE_MAPPING(sbi))) { |
afcb7ca0 JK |
1019 | f2fs_put_page(page, 1); |
1020 | goto repeat; | |
1021 | } | |
e0f56cb4 | 1022 | page_hit: |
6bacf52f | 1023 | if (unlikely(!PageUptodate(page))) { |
e05df3b1 JK |
1024 | f2fs_put_page(page, 1); |
1025 | return ERR_PTR(-EIO); | |
1026 | } | |
393ff91f | 1027 | mark_page_accessed(page); |
e05df3b1 JK |
1028 | return page; |
1029 | } | |
1030 | ||
1031 | void sync_inode_page(struct dnode_of_data *dn) | |
1032 | { | |
1033 | if (IS_INODE(dn->node_page) || dn->inode_page == dn->node_page) { | |
1034 | update_inode(dn->inode, dn->node_page); | |
1035 | } else if (dn->inode_page) { | |
1036 | if (!dn->inode_page_locked) | |
1037 | lock_page(dn->inode_page); | |
1038 | update_inode(dn->inode, dn->inode_page); | |
1039 | if (!dn->inode_page_locked) | |
1040 | unlock_page(dn->inode_page); | |
1041 | } else { | |
39936837 | 1042 | update_inode_page(dn->inode); |
e05df3b1 JK |
1043 | } |
1044 | } | |
1045 | ||
1046 | int sync_node_pages(struct f2fs_sb_info *sbi, nid_t ino, | |
1047 | struct writeback_control *wbc) | |
1048 | { | |
e05df3b1 JK |
1049 | pgoff_t index, end; |
1050 | struct pagevec pvec; | |
1051 | int step = ino ? 2 : 0; | |
1052 | int nwritten = 0, wrote = 0; | |
1053 | ||
1054 | pagevec_init(&pvec, 0); | |
1055 | ||
1056 | next_step: | |
1057 | index = 0; | |
1058 | end = LONG_MAX; | |
1059 | ||
1060 | while (index <= end) { | |
1061 | int i, nr_pages; | |
4ef51a8f | 1062 | nr_pages = pagevec_lookup_tag(&pvec, NODE_MAPPING(sbi), &index, |
e05df3b1 JK |
1063 | PAGECACHE_TAG_DIRTY, |
1064 | min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1); | |
1065 | if (nr_pages == 0) | |
1066 | break; | |
1067 | ||
1068 | for (i = 0; i < nr_pages; i++) { | |
1069 | struct page *page = pvec.pages[i]; | |
1070 | ||
1071 | /* | |
1072 | * flushing sequence with step: | |
1073 | * 0. indirect nodes | |
1074 | * 1. dentry dnodes | |
1075 | * 2. file dnodes | |
1076 | */ | |
1077 | if (step == 0 && IS_DNODE(page)) | |
1078 | continue; | |
1079 | if (step == 1 && (!IS_DNODE(page) || | |
1080 | is_cold_node(page))) | |
1081 | continue; | |
1082 | if (step == 2 && (!IS_DNODE(page) || | |
1083 | !is_cold_node(page))) | |
1084 | continue; | |
1085 | ||
1086 | /* | |
1087 | * If an fsync mode, | |
1088 | * we should not skip writing node pages. | |
1089 | */ | |
1090 | if (ino && ino_of_node(page) == ino) | |
1091 | lock_page(page); | |
1092 | else if (!trylock_page(page)) | |
1093 | continue; | |
1094 | ||
4ef51a8f | 1095 | if (unlikely(page->mapping != NODE_MAPPING(sbi))) { |
e05df3b1 JK |
1096 | continue_unlock: |
1097 | unlock_page(page); | |
1098 | continue; | |
1099 | } | |
1100 | if (ino && ino_of_node(page) != ino) | |
1101 | goto continue_unlock; | |
1102 | ||
1103 | if (!PageDirty(page)) { | |
1104 | /* someone wrote it for us */ | |
1105 | goto continue_unlock; | |
1106 | } | |
1107 | ||
1108 | if (!clear_page_dirty_for_io(page)) | |
1109 | goto continue_unlock; | |
1110 | ||
1111 | /* called by fsync() */ | |
1112 | if (ino && IS_DNODE(page)) { | |
1113 | int mark = !is_checkpointed_node(sbi, ino); | |
1114 | set_fsync_mark(page, 1); | |
1115 | if (IS_INODE(page)) | |
1116 | set_dentry_mark(page, mark); | |
1117 | nwritten++; | |
1118 | } else { | |
1119 | set_fsync_mark(page, 0); | |
1120 | set_dentry_mark(page, 0); | |
1121 | } | |
4ef51a8f | 1122 | NODE_MAPPING(sbi)->a_ops->writepage(page, wbc); |
e05df3b1 JK |
1123 | wrote++; |
1124 | ||
1125 | if (--wbc->nr_to_write == 0) | |
1126 | break; | |
1127 | } | |
1128 | pagevec_release(&pvec); | |
1129 | cond_resched(); | |
1130 | ||
1131 | if (wbc->nr_to_write == 0) { | |
1132 | step = 2; | |
1133 | break; | |
1134 | } | |
1135 | } | |
1136 | ||
1137 | if (step < 2) { | |
1138 | step++; | |
1139 | goto next_step; | |
1140 | } | |
1141 | ||
1142 | if (wrote) | |
458e6197 | 1143 | f2fs_submit_merged_bio(sbi, NODE, WRITE); |
e05df3b1 JK |
1144 | return nwritten; |
1145 | } | |
1146 | ||
cfe58f9d JK |
1147 | int wait_on_node_pages_writeback(struct f2fs_sb_info *sbi, nid_t ino) |
1148 | { | |
cfe58f9d JK |
1149 | pgoff_t index = 0, end = LONG_MAX; |
1150 | struct pagevec pvec; | |
cfe58f9d JK |
1151 | int ret2 = 0, ret = 0; |
1152 | ||
1153 | pagevec_init(&pvec, 0); | |
4ef51a8f JK |
1154 | |
1155 | while (index <= end) { | |
1156 | int i, nr_pages; | |
1157 | nr_pages = pagevec_lookup_tag(&pvec, NODE_MAPPING(sbi), &index, | |
1158 | PAGECACHE_TAG_WRITEBACK, | |
1159 | min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1); | |
1160 | if (nr_pages == 0) | |
1161 | break; | |
cfe58f9d JK |
1162 | |
1163 | for (i = 0; i < nr_pages; i++) { | |
1164 | struct page *page = pvec.pages[i]; | |
1165 | ||
1166 | /* until radix tree lookup accepts end_index */ | |
cfb271d4 | 1167 | if (unlikely(page->index > end)) |
cfe58f9d JK |
1168 | continue; |
1169 | ||
4bf08ff6 | 1170 | if (ino && ino_of_node(page) == ino) { |
cfe58f9d | 1171 | wait_on_page_writeback(page); |
4bf08ff6 CY |
1172 | if (TestClearPageError(page)) |
1173 | ret = -EIO; | |
1174 | } | |
cfe58f9d JK |
1175 | } |
1176 | pagevec_release(&pvec); | |
1177 | cond_resched(); | |
1178 | } | |
1179 | ||
4ef51a8f | 1180 | if (unlikely(test_and_clear_bit(AS_ENOSPC, &NODE_MAPPING(sbi)->flags))) |
cfe58f9d | 1181 | ret2 = -ENOSPC; |
4ef51a8f | 1182 | if (unlikely(test_and_clear_bit(AS_EIO, &NODE_MAPPING(sbi)->flags))) |
cfe58f9d JK |
1183 | ret2 = -EIO; |
1184 | if (!ret) | |
1185 | ret = ret2; | |
1186 | return ret; | |
1187 | } | |
1188 | ||
e05df3b1 JK |
1189 | static int f2fs_write_node_page(struct page *page, |
1190 | struct writeback_control *wbc) | |
1191 | { | |
1192 | struct f2fs_sb_info *sbi = F2FS_SB(page->mapping->host->i_sb); | |
1193 | nid_t nid; | |
e05df3b1 JK |
1194 | block_t new_addr; |
1195 | struct node_info ni; | |
fb5566da JK |
1196 | struct f2fs_io_info fio = { |
1197 | .type = NODE, | |
6c311ec6 | 1198 | .rw = (wbc->sync_mode == WB_SYNC_ALL) ? WRITE_SYNC : WRITE, |
fb5566da | 1199 | }; |
e05df3b1 | 1200 | |
cfb271d4 | 1201 | if (unlikely(sbi->por_doing)) |
87a9bd26 JK |
1202 | goto redirty_out; |
1203 | ||
e05df3b1 JK |
1204 | wait_on_page_writeback(page); |
1205 | ||
e05df3b1 JK |
1206 | /* get old block addr of this node page */ |
1207 | nid = nid_of_node(page); | |
5d56b671 | 1208 | f2fs_bug_on(page->index != nid); |
e05df3b1 JK |
1209 | |
1210 | get_node_info(sbi, nid, &ni); | |
1211 | ||
1212 | /* This page is already truncated */ | |
6bacf52f | 1213 | if (unlikely(ni.blk_addr == NULL_ADDR)) { |
39936837 JK |
1214 | dec_page_count(sbi, F2FS_DIRTY_NODES); |
1215 | unlock_page(page); | |
1216 | return 0; | |
1217 | } | |
e05df3b1 | 1218 | |
87a9bd26 JK |
1219 | if (wbc->for_reclaim) |
1220 | goto redirty_out; | |
08d8058b | 1221 | |
39936837 | 1222 | mutex_lock(&sbi->node_write); |
e05df3b1 | 1223 | set_page_writeback(page); |
fb5566da | 1224 | write_node_page(sbi, page, &fio, nid, ni.blk_addr, &new_addr); |
e05df3b1 JK |
1225 | set_node_addr(sbi, &ni, new_addr); |
1226 | dec_page_count(sbi, F2FS_DIRTY_NODES); | |
39936837 | 1227 | mutex_unlock(&sbi->node_write); |
e05df3b1 JK |
1228 | unlock_page(page); |
1229 | return 0; | |
87a9bd26 JK |
1230 | |
1231 | redirty_out: | |
1232 | dec_page_count(sbi, F2FS_DIRTY_NODES); | |
1233 | wbc->pages_skipped++; | |
1234 | set_page_dirty(page); | |
1235 | return AOP_WRITEPAGE_ACTIVATE; | |
e05df3b1 JK |
1236 | } |
1237 | ||
a7fdffbd JK |
1238 | /* |
1239 | * It is very important to gather dirty pages and write at once, so that we can | |
1240 | * submit a big bio without interfering other data writes. | |
423e95cc | 1241 | * Be default, 512 pages (2MB) * 3 node types, is more reasonable. |
a7fdffbd | 1242 | */ |
423e95cc | 1243 | #define COLLECT_DIRTY_NODES 1536 |
e05df3b1 JK |
1244 | static int f2fs_write_node_pages(struct address_space *mapping, |
1245 | struct writeback_control *wbc) | |
1246 | { | |
1247 | struct f2fs_sb_info *sbi = F2FS_SB(mapping->host->i_sb); | |
e05df3b1 JK |
1248 | long nr_to_write = wbc->nr_to_write; |
1249 | ||
4660f9c0 JK |
1250 | /* balancing f2fs's metadata in background */ |
1251 | f2fs_balance_fs_bg(sbi); | |
e05df3b1 | 1252 | |
a7fdffbd JK |
1253 | /* collect a number of dirty node pages and write together */ |
1254 | if (get_pages(sbi, F2FS_DIRTY_NODES) < COLLECT_DIRTY_NODES) | |
1255 | return 0; | |
1256 | ||
e05df3b1 | 1257 | /* if mounting is failed, skip writing node pages */ |
423e95cc | 1258 | wbc->nr_to_write = 3 * max_hw_blocks(sbi); |
fb5566da | 1259 | wbc->sync_mode = WB_SYNC_NONE; |
e05df3b1 | 1260 | sync_node_pages(sbi, 0, wbc); |
423e95cc JK |
1261 | wbc->nr_to_write = nr_to_write - (3 * max_hw_blocks(sbi) - |
1262 | wbc->nr_to_write); | |
e05df3b1 JK |
1263 | return 0; |
1264 | } | |
1265 | ||
1266 | static int f2fs_set_node_page_dirty(struct page *page) | |
1267 | { | |
1268 | struct address_space *mapping = page->mapping; | |
1269 | struct f2fs_sb_info *sbi = F2FS_SB(mapping->host->i_sb); | |
1270 | ||
26c6b887 JK |
1271 | trace_f2fs_set_page_dirty(page, NODE); |
1272 | ||
e05df3b1 JK |
1273 | SetPageUptodate(page); |
1274 | if (!PageDirty(page)) { | |
1275 | __set_page_dirty_nobuffers(page); | |
1276 | inc_page_count(sbi, F2FS_DIRTY_NODES); | |
1277 | SetPagePrivate(page); | |
1278 | return 1; | |
1279 | } | |
1280 | return 0; | |
1281 | } | |
1282 | ||
d47992f8 LC |
1283 | static void f2fs_invalidate_node_page(struct page *page, unsigned int offset, |
1284 | unsigned int length) | |
e05df3b1 JK |
1285 | { |
1286 | struct inode *inode = page->mapping->host; | |
1287 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
1288 | if (PageDirty(page)) | |
1289 | dec_page_count(sbi, F2FS_DIRTY_NODES); | |
1290 | ClearPagePrivate(page); | |
1291 | } | |
1292 | ||
1293 | static int f2fs_release_node_page(struct page *page, gfp_t wait) | |
1294 | { | |
1295 | ClearPagePrivate(page); | |
c3850aa1 | 1296 | return 1; |
e05df3b1 JK |
1297 | } |
1298 | ||
0a8165d7 | 1299 | /* |
e05df3b1 JK |
1300 | * Structure of the f2fs node operations |
1301 | */ | |
1302 | const struct address_space_operations f2fs_node_aops = { | |
1303 | .writepage = f2fs_write_node_page, | |
1304 | .writepages = f2fs_write_node_pages, | |
1305 | .set_page_dirty = f2fs_set_node_page_dirty, | |
1306 | .invalidatepage = f2fs_invalidate_node_page, | |
1307 | .releasepage = f2fs_release_node_page, | |
1308 | }; | |
1309 | ||
1310 | static struct free_nid *__lookup_free_nid_list(nid_t n, struct list_head *head) | |
1311 | { | |
1312 | struct list_head *this; | |
3aa770a9 | 1313 | struct free_nid *i; |
e05df3b1 JK |
1314 | list_for_each(this, head) { |
1315 | i = list_entry(this, struct free_nid, list); | |
1316 | if (i->nid == n) | |
3aa770a9 | 1317 | return i; |
e05df3b1 | 1318 | } |
3aa770a9 | 1319 | return NULL; |
e05df3b1 JK |
1320 | } |
1321 | ||
1322 | static void __del_from_free_nid_list(struct free_nid *i) | |
1323 | { | |
1324 | list_del(&i->list); | |
1325 | kmem_cache_free(free_nid_slab, i); | |
1326 | } | |
1327 | ||
59bbd474 | 1328 | static int add_free_nid(struct f2fs_nm_info *nm_i, nid_t nid, bool build) |
e05df3b1 JK |
1329 | { |
1330 | struct free_nid *i; | |
59bbd474 JK |
1331 | struct nat_entry *ne; |
1332 | bool allocated = false; | |
e05df3b1 JK |
1333 | |
1334 | if (nm_i->fcnt > 2 * MAX_FREE_NIDS) | |
23d38844 | 1335 | return -1; |
9198aceb JK |
1336 | |
1337 | /* 0 nid should not be used */ | |
cfb271d4 | 1338 | if (unlikely(nid == 0)) |
9198aceb | 1339 | return 0; |
59bbd474 | 1340 | |
7bd59381 GZ |
1341 | if (build) { |
1342 | /* do not add allocated nids */ | |
1343 | read_lock(&nm_i->nat_tree_lock); | |
1344 | ne = __lookup_nat_cache(nm_i, nid); | |
1345 | if (ne && nat_get_blkaddr(ne) != NULL_ADDR) | |
1346 | allocated = true; | |
1347 | read_unlock(&nm_i->nat_tree_lock); | |
1348 | if (allocated) | |
1349 | return 0; | |
e05df3b1 | 1350 | } |
7bd59381 GZ |
1351 | |
1352 | i = f2fs_kmem_cache_alloc(free_nid_slab, GFP_NOFS); | |
e05df3b1 JK |
1353 | i->nid = nid; |
1354 | i->state = NID_NEW; | |
1355 | ||
1356 | spin_lock(&nm_i->free_nid_list_lock); | |
1357 | if (__lookup_free_nid_list(nid, &nm_i->free_nid_list)) { | |
1358 | spin_unlock(&nm_i->free_nid_list_lock); | |
1359 | kmem_cache_free(free_nid_slab, i); | |
1360 | return 0; | |
1361 | } | |
1362 | list_add_tail(&i->list, &nm_i->free_nid_list); | |
1363 | nm_i->fcnt++; | |
1364 | spin_unlock(&nm_i->free_nid_list_lock); | |
1365 | return 1; | |
1366 | } | |
1367 | ||
1368 | static void remove_free_nid(struct f2fs_nm_info *nm_i, nid_t nid) | |
1369 | { | |
1370 | struct free_nid *i; | |
1371 | spin_lock(&nm_i->free_nid_list_lock); | |
1372 | i = __lookup_free_nid_list(nid, &nm_i->free_nid_list); | |
1373 | if (i && i->state == NID_NEW) { | |
1374 | __del_from_free_nid_list(i); | |
1375 | nm_i->fcnt--; | |
1376 | } | |
1377 | spin_unlock(&nm_i->free_nid_list_lock); | |
1378 | } | |
1379 | ||
8760952d | 1380 | static void scan_nat_page(struct f2fs_nm_info *nm_i, |
e05df3b1 JK |
1381 | struct page *nat_page, nid_t start_nid) |
1382 | { | |
1383 | struct f2fs_nat_block *nat_blk = page_address(nat_page); | |
1384 | block_t blk_addr; | |
e05df3b1 JK |
1385 | int i; |
1386 | ||
e05df3b1 JK |
1387 | i = start_nid % NAT_ENTRY_PER_BLOCK; |
1388 | ||
1389 | for (; i < NAT_ENTRY_PER_BLOCK; i++, start_nid++) { | |
23d38844 | 1390 | |
cfb271d4 | 1391 | if (unlikely(start_nid >= nm_i->max_nid)) |
04431c44 | 1392 | break; |
23d38844 HL |
1393 | |
1394 | blk_addr = le32_to_cpu(nat_blk->entries[i].block_addr); | |
5d56b671 | 1395 | f2fs_bug_on(blk_addr == NEW_ADDR); |
23d38844 | 1396 | if (blk_addr == NULL_ADDR) { |
59bbd474 | 1397 | if (add_free_nid(nm_i, start_nid, true) < 0) |
23d38844 HL |
1398 | break; |
1399 | } | |
e05df3b1 | 1400 | } |
e05df3b1 JK |
1401 | } |
1402 | ||
1403 | static void build_free_nids(struct f2fs_sb_info *sbi) | |
1404 | { | |
e05df3b1 JK |
1405 | struct f2fs_nm_info *nm_i = NM_I(sbi); |
1406 | struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); | |
1407 | struct f2fs_summary_block *sum = curseg->sum_blk; | |
8760952d | 1408 | int i = 0; |
55008d84 | 1409 | nid_t nid = nm_i->next_scan_nid; |
e05df3b1 | 1410 | |
55008d84 JK |
1411 | /* Enough entries */ |
1412 | if (nm_i->fcnt > NAT_ENTRY_PER_BLOCK) | |
1413 | return; | |
e05df3b1 | 1414 | |
55008d84 | 1415 | /* readahead nat pages to be scanned */ |
e05df3b1 JK |
1416 | ra_nat_pages(sbi, nid); |
1417 | ||
1418 | while (1) { | |
1419 | struct page *page = get_current_nat_page(sbi, nid); | |
1420 | ||
8760952d | 1421 | scan_nat_page(nm_i, page, nid); |
e05df3b1 JK |
1422 | f2fs_put_page(page, 1); |
1423 | ||
1424 | nid += (NAT_ENTRY_PER_BLOCK - (nid % NAT_ENTRY_PER_BLOCK)); | |
cfb271d4 | 1425 | if (unlikely(nid >= nm_i->max_nid)) |
e05df3b1 | 1426 | nid = 0; |
55008d84 JK |
1427 | |
1428 | if (i++ == FREE_NID_PAGES) | |
e05df3b1 JK |
1429 | break; |
1430 | } | |
1431 | ||
55008d84 JK |
1432 | /* go to the next free nat pages to find free nids abundantly */ |
1433 | nm_i->next_scan_nid = nid; | |
e05df3b1 JK |
1434 | |
1435 | /* find free nids from current sum_pages */ | |
1436 | mutex_lock(&curseg->curseg_mutex); | |
1437 | for (i = 0; i < nats_in_cursum(sum); i++) { | |
1438 | block_t addr = le32_to_cpu(nat_in_journal(sum, i).block_addr); | |
1439 | nid = le32_to_cpu(nid_in_journal(sum, i)); | |
1440 | if (addr == NULL_ADDR) | |
59bbd474 | 1441 | add_free_nid(nm_i, nid, true); |
e05df3b1 JK |
1442 | else |
1443 | remove_free_nid(nm_i, nid); | |
1444 | } | |
1445 | mutex_unlock(&curseg->curseg_mutex); | |
e05df3b1 JK |
1446 | } |
1447 | ||
1448 | /* | |
1449 | * If this function returns success, caller can obtain a new nid | |
1450 | * from second parameter of this function. | |
1451 | * The returned nid could be used ino as well as nid when inode is created. | |
1452 | */ | |
1453 | bool alloc_nid(struct f2fs_sb_info *sbi, nid_t *nid) | |
1454 | { | |
1455 | struct f2fs_nm_info *nm_i = NM_I(sbi); | |
1456 | struct free_nid *i = NULL; | |
1457 | struct list_head *this; | |
1458 | retry: | |
cfb271d4 | 1459 | if (unlikely(sbi->total_valid_node_count + 1 >= nm_i->max_nid)) |
55008d84 | 1460 | return false; |
e05df3b1 | 1461 | |
e05df3b1 | 1462 | spin_lock(&nm_i->free_nid_list_lock); |
e05df3b1 | 1463 | |
55008d84 JK |
1464 | /* We should not use stale free nids created by build_free_nids */ |
1465 | if (nm_i->fcnt && !sbi->on_build_free_nids) { | |
5d56b671 | 1466 | f2fs_bug_on(list_empty(&nm_i->free_nid_list)); |
55008d84 JK |
1467 | list_for_each(this, &nm_i->free_nid_list) { |
1468 | i = list_entry(this, struct free_nid, list); | |
1469 | if (i->state == NID_NEW) | |
1470 | break; | |
1471 | } | |
e05df3b1 | 1472 | |
5d56b671 | 1473 | f2fs_bug_on(i->state != NID_NEW); |
55008d84 JK |
1474 | *nid = i->nid; |
1475 | i->state = NID_ALLOC; | |
1476 | nm_i->fcnt--; | |
1477 | spin_unlock(&nm_i->free_nid_list_lock); | |
1478 | return true; | |
1479 | } | |
e05df3b1 | 1480 | spin_unlock(&nm_i->free_nid_list_lock); |
55008d84 JK |
1481 | |
1482 | /* Let's scan nat pages and its caches to get free nids */ | |
1483 | mutex_lock(&nm_i->build_lock); | |
aabe5136 | 1484 | sbi->on_build_free_nids = true; |
55008d84 | 1485 | build_free_nids(sbi); |
aabe5136 | 1486 | sbi->on_build_free_nids = false; |
55008d84 JK |
1487 | mutex_unlock(&nm_i->build_lock); |
1488 | goto retry; | |
e05df3b1 JK |
1489 | } |
1490 | ||
0a8165d7 | 1491 | /* |
e05df3b1 JK |
1492 | * alloc_nid() should be called prior to this function. |
1493 | */ | |
1494 | void alloc_nid_done(struct f2fs_sb_info *sbi, nid_t nid) | |
1495 | { | |
1496 | struct f2fs_nm_info *nm_i = NM_I(sbi); | |
1497 | struct free_nid *i; | |
1498 | ||
1499 | spin_lock(&nm_i->free_nid_list_lock); | |
1500 | i = __lookup_free_nid_list(nid, &nm_i->free_nid_list); | |
5d56b671 | 1501 | f2fs_bug_on(!i || i->state != NID_ALLOC); |
49952fa1 | 1502 | __del_from_free_nid_list(i); |
e05df3b1 JK |
1503 | spin_unlock(&nm_i->free_nid_list_lock); |
1504 | } | |
1505 | ||
0a8165d7 | 1506 | /* |
e05df3b1 JK |
1507 | * alloc_nid() should be called prior to this function. |
1508 | */ | |
1509 | void alloc_nid_failed(struct f2fs_sb_info *sbi, nid_t nid) | |
1510 | { | |
49952fa1 JK |
1511 | struct f2fs_nm_info *nm_i = NM_I(sbi); |
1512 | struct free_nid *i; | |
1513 | ||
65985d93 JK |
1514 | if (!nid) |
1515 | return; | |
1516 | ||
49952fa1 JK |
1517 | spin_lock(&nm_i->free_nid_list_lock); |
1518 | i = __lookup_free_nid_list(nid, &nm_i->free_nid_list); | |
5d56b671 | 1519 | f2fs_bug_on(!i || i->state != NID_ALLOC); |
95630cba HL |
1520 | if (nm_i->fcnt > 2 * MAX_FREE_NIDS) { |
1521 | __del_from_free_nid_list(i); | |
1522 | } else { | |
1523 | i->state = NID_NEW; | |
1524 | nm_i->fcnt++; | |
1525 | } | |
49952fa1 | 1526 | spin_unlock(&nm_i->free_nid_list_lock); |
e05df3b1 JK |
1527 | } |
1528 | ||
1529 | void recover_node_page(struct f2fs_sb_info *sbi, struct page *page, | |
1530 | struct f2fs_summary *sum, struct node_info *ni, | |
1531 | block_t new_blkaddr) | |
1532 | { | |
1533 | rewrite_node_page(sbi, page, sum, ni->blk_addr, new_blkaddr); | |
1534 | set_node_addr(sbi, ni, new_blkaddr); | |
1535 | clear_node_page_dirty(page); | |
1536 | } | |
1537 | ||
1538 | int recover_inode_page(struct f2fs_sb_info *sbi, struct page *page) | |
1539 | { | |
58bfaf44 | 1540 | struct f2fs_inode *src, *dst; |
e05df3b1 JK |
1541 | nid_t ino = ino_of_node(page); |
1542 | struct node_info old_ni, new_ni; | |
1543 | struct page *ipage; | |
1544 | ||
4ef51a8f | 1545 | ipage = grab_cache_page(NODE_MAPPING(sbi), ino); |
e05df3b1 JK |
1546 | if (!ipage) |
1547 | return -ENOMEM; | |
1548 | ||
1549 | /* Should not use this inode from free nid list */ | |
1550 | remove_free_nid(NM_I(sbi), ino); | |
1551 | ||
1552 | get_node_info(sbi, ino, &old_ni); | |
1553 | SetPageUptodate(ipage); | |
1554 | fill_node_footer(ipage, ino, ino, 0, true); | |
1555 | ||
58bfaf44 JK |
1556 | src = F2FS_INODE(page); |
1557 | dst = F2FS_INODE(ipage); | |
e05df3b1 | 1558 | |
58bfaf44 JK |
1559 | memcpy(dst, src, (unsigned long)&src->i_ext - (unsigned long)src); |
1560 | dst->i_size = 0; | |
1561 | dst->i_blocks = cpu_to_le64(1); | |
1562 | dst->i_links = cpu_to_le32(1); | |
1563 | dst->i_xattr_nid = 0; | |
e05df3b1 JK |
1564 | |
1565 | new_ni = old_ni; | |
1566 | new_ni.ino = ino; | |
1567 | ||
cfb271d4 | 1568 | if (unlikely(!inc_valid_node_count(sbi, NULL))) |
65e5cd0a | 1569 | WARN_ON(1); |
e05df3b1 JK |
1570 | set_node_addr(sbi, &new_ni, NEW_ADDR); |
1571 | inc_valid_inode_count(sbi); | |
e05df3b1 JK |
1572 | f2fs_put_page(ipage, 1); |
1573 | return 0; | |
1574 | } | |
1575 | ||
9af0ff1c CY |
1576 | /* |
1577 | * ra_sum_pages() merge contiguous pages into one bio and submit. | |
1578 | * these pre-readed pages are linked in pages list. | |
1579 | */ | |
1580 | static int ra_sum_pages(struct f2fs_sb_info *sbi, struct list_head *pages, | |
1581 | int start, int nrpages) | |
1582 | { | |
1583 | struct page *page; | |
1584 | int page_idx = start; | |
458e6197 JK |
1585 | struct f2fs_io_info fio = { |
1586 | .type = META, | |
7e8f2308 | 1587 | .rw = READ_SYNC | REQ_META | REQ_PRIO |
458e6197 | 1588 | }; |
9af0ff1c CY |
1589 | |
1590 | for (; page_idx < start + nrpages; page_idx++) { | |
1591 | /* alloc temporal page for read node summary info*/ | |
a0acdfe0 | 1592 | page = alloc_page(GFP_F2FS_ZERO); |
9af0ff1c CY |
1593 | if (!page) { |
1594 | struct page *tmp; | |
1595 | list_for_each_entry_safe(page, tmp, pages, lru) { | |
1596 | list_del(&page->lru); | |
1597 | unlock_page(page); | |
1598 | __free_pages(page, 0); | |
1599 | } | |
1600 | return -ENOMEM; | |
1601 | } | |
1602 | ||
1603 | lock_page(page); | |
1604 | page->index = page_idx; | |
1605 | list_add_tail(&page->lru, pages); | |
1606 | } | |
1607 | ||
1608 | list_for_each_entry(page, pages, lru) | |
458e6197 | 1609 | f2fs_submit_page_mbio(sbi, page, page->index, &fio); |
9af0ff1c | 1610 | |
458e6197 | 1611 | f2fs_submit_merged_bio(sbi, META, READ); |
9af0ff1c CY |
1612 | return 0; |
1613 | } | |
1614 | ||
e05df3b1 JK |
1615 | int restore_node_summary(struct f2fs_sb_info *sbi, |
1616 | unsigned int segno, struct f2fs_summary_block *sum) | |
1617 | { | |
1618 | struct f2fs_node *rn; | |
1619 | struct f2fs_summary *sum_entry; | |
9af0ff1c | 1620 | struct page *page, *tmp; |
e05df3b1 | 1621 | block_t addr; |
9af0ff1c CY |
1622 | int bio_blocks = MAX_BIO_BLOCKS(max_hw_blocks(sbi)); |
1623 | int i, last_offset, nrpages, err = 0; | |
1624 | LIST_HEAD(page_list); | |
e05df3b1 JK |
1625 | |
1626 | /* scan the node segment */ | |
1627 | last_offset = sbi->blocks_per_seg; | |
1628 | addr = START_BLOCK(sbi, segno); | |
1629 | sum_entry = &sum->entries[0]; | |
1630 | ||
9af0ff1c CY |
1631 | for (i = 0; i < last_offset; i += nrpages, addr += nrpages) { |
1632 | nrpages = min(last_offset - i, bio_blocks); | |
393ff91f | 1633 | |
9af0ff1c CY |
1634 | /* read ahead node pages */ |
1635 | err = ra_sum_pages(sbi, &page_list, addr, nrpages); | |
1636 | if (err) | |
1637 | return err; | |
e05df3b1 | 1638 | |
9af0ff1c CY |
1639 | list_for_each_entry_safe(page, tmp, &page_list, lru) { |
1640 | ||
1641 | lock_page(page); | |
6bacf52f JK |
1642 | if (unlikely(!PageUptodate(page))) { |
1643 | err = -EIO; | |
1644 | } else { | |
9af0ff1c CY |
1645 | rn = F2FS_NODE(page); |
1646 | sum_entry->nid = rn->footer.nid; | |
1647 | sum_entry->version = 0; | |
1648 | sum_entry->ofs_in_node = 0; | |
1649 | sum_entry++; | |
9af0ff1c CY |
1650 | } |
1651 | ||
1652 | list_del(&page->lru); | |
1653 | unlock_page(page); | |
1654 | __free_pages(page, 0); | |
1655 | } | |
e05df3b1 | 1656 | } |
9af0ff1c | 1657 | return err; |
e05df3b1 JK |
1658 | } |
1659 | ||
1660 | static bool flush_nats_in_journal(struct f2fs_sb_info *sbi) | |
1661 | { | |
1662 | struct f2fs_nm_info *nm_i = NM_I(sbi); | |
1663 | struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); | |
1664 | struct f2fs_summary_block *sum = curseg->sum_blk; | |
1665 | int i; | |
1666 | ||
1667 | mutex_lock(&curseg->curseg_mutex); | |
1668 | ||
1669 | if (nats_in_cursum(sum) < NAT_JOURNAL_ENTRIES) { | |
1670 | mutex_unlock(&curseg->curseg_mutex); | |
1671 | return false; | |
1672 | } | |
1673 | ||
1674 | for (i = 0; i < nats_in_cursum(sum); i++) { | |
1675 | struct nat_entry *ne; | |
1676 | struct f2fs_nat_entry raw_ne; | |
1677 | nid_t nid = le32_to_cpu(nid_in_journal(sum, i)); | |
1678 | ||
1679 | raw_ne = nat_in_journal(sum, i); | |
1680 | retry: | |
1681 | write_lock(&nm_i->nat_tree_lock); | |
1682 | ne = __lookup_nat_cache(nm_i, nid); | |
1683 | if (ne) { | |
1684 | __set_nat_cache_dirty(nm_i, ne); | |
1685 | write_unlock(&nm_i->nat_tree_lock); | |
1686 | continue; | |
1687 | } | |
1688 | ne = grab_nat_entry(nm_i, nid); | |
1689 | if (!ne) { | |
1690 | write_unlock(&nm_i->nat_tree_lock); | |
1691 | goto retry; | |
1692 | } | |
1693 | nat_set_blkaddr(ne, le32_to_cpu(raw_ne.block_addr)); | |
1694 | nat_set_ino(ne, le32_to_cpu(raw_ne.ino)); | |
1695 | nat_set_version(ne, raw_ne.version); | |
1696 | __set_nat_cache_dirty(nm_i, ne); | |
1697 | write_unlock(&nm_i->nat_tree_lock); | |
1698 | } | |
1699 | update_nats_in_cursum(sum, -i); | |
1700 | mutex_unlock(&curseg->curseg_mutex); | |
1701 | return true; | |
1702 | } | |
1703 | ||
0a8165d7 | 1704 | /* |
e05df3b1 JK |
1705 | * This function is called during the checkpointing process. |
1706 | */ | |
1707 | void flush_nat_entries(struct f2fs_sb_info *sbi) | |
1708 | { | |
1709 | struct f2fs_nm_info *nm_i = NM_I(sbi); | |
1710 | struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); | |
1711 | struct f2fs_summary_block *sum = curseg->sum_blk; | |
1712 | struct list_head *cur, *n; | |
1713 | struct page *page = NULL; | |
1714 | struct f2fs_nat_block *nat_blk = NULL; | |
1715 | nid_t start_nid = 0, end_nid = 0; | |
1716 | bool flushed; | |
1717 | ||
1718 | flushed = flush_nats_in_journal(sbi); | |
1719 | ||
1720 | if (!flushed) | |
1721 | mutex_lock(&curseg->curseg_mutex); | |
1722 | ||
1723 | /* 1) flush dirty nat caches */ | |
1724 | list_for_each_safe(cur, n, &nm_i->dirty_nat_entries) { | |
1725 | struct nat_entry *ne; | |
1726 | nid_t nid; | |
1727 | struct f2fs_nat_entry raw_ne; | |
1728 | int offset = -1; | |
2b50638d | 1729 | block_t new_blkaddr; |
e05df3b1 JK |
1730 | |
1731 | ne = list_entry(cur, struct nat_entry, list); | |
1732 | nid = nat_get_nid(ne); | |
1733 | ||
1734 | if (nat_get_blkaddr(ne) == NEW_ADDR) | |
1735 | continue; | |
1736 | if (flushed) | |
1737 | goto to_nat_page; | |
1738 | ||
1739 | /* if there is room for nat enries in curseg->sumpage */ | |
1740 | offset = lookup_journal_in_cursum(sum, NAT_JOURNAL, nid, 1); | |
1741 | if (offset >= 0) { | |
1742 | raw_ne = nat_in_journal(sum, offset); | |
e05df3b1 JK |
1743 | goto flush_now; |
1744 | } | |
1745 | to_nat_page: | |
1746 | if (!page || (start_nid > nid || nid > end_nid)) { | |
1747 | if (page) { | |
1748 | f2fs_put_page(page, 1); | |
1749 | page = NULL; | |
1750 | } | |
1751 | start_nid = START_NID(nid); | |
1752 | end_nid = start_nid + NAT_ENTRY_PER_BLOCK - 1; | |
1753 | ||
1754 | /* | |
1755 | * get nat block with dirty flag, increased reference | |
1756 | * count, mapped and lock | |
1757 | */ | |
1758 | page = get_next_nat_page(sbi, start_nid); | |
1759 | nat_blk = page_address(page); | |
1760 | } | |
1761 | ||
5d56b671 | 1762 | f2fs_bug_on(!nat_blk); |
e05df3b1 | 1763 | raw_ne = nat_blk->entries[nid - start_nid]; |
e05df3b1 JK |
1764 | flush_now: |
1765 | new_blkaddr = nat_get_blkaddr(ne); | |
1766 | ||
1767 | raw_ne.ino = cpu_to_le32(nat_get_ino(ne)); | |
1768 | raw_ne.block_addr = cpu_to_le32(new_blkaddr); | |
1769 | raw_ne.version = nat_get_version(ne); | |
1770 | ||
1771 | if (offset < 0) { | |
1772 | nat_blk->entries[nid - start_nid] = raw_ne; | |
1773 | } else { | |
1774 | nat_in_journal(sum, offset) = raw_ne; | |
1775 | nid_in_journal(sum, offset) = cpu_to_le32(nid); | |
1776 | } | |
1777 | ||
fa372417 | 1778 | if (nat_get_blkaddr(ne) == NULL_ADDR && |
59bbd474 | 1779 | add_free_nid(NM_I(sbi), nid, false) <= 0) { |
e05df3b1 JK |
1780 | write_lock(&nm_i->nat_tree_lock); |
1781 | __del_from_nat_cache(nm_i, ne); | |
1782 | write_unlock(&nm_i->nat_tree_lock); | |
e05df3b1 JK |
1783 | } else { |
1784 | write_lock(&nm_i->nat_tree_lock); | |
1785 | __clear_nat_cache_dirty(nm_i, ne); | |
1786 | ne->checkpointed = true; | |
1787 | write_unlock(&nm_i->nat_tree_lock); | |
1788 | } | |
1789 | } | |
1790 | if (!flushed) | |
1791 | mutex_unlock(&curseg->curseg_mutex); | |
1792 | f2fs_put_page(page, 1); | |
1793 | ||
1794 | /* 2) shrink nat caches if necessary */ | |
1795 | try_to_free_nats(sbi, nm_i->nat_cnt - NM_WOUT_THRESHOLD); | |
1796 | } | |
1797 | ||
1798 | static int init_node_manager(struct f2fs_sb_info *sbi) | |
1799 | { | |
1800 | struct f2fs_super_block *sb_raw = F2FS_RAW_SUPER(sbi); | |
1801 | struct f2fs_nm_info *nm_i = NM_I(sbi); | |
1802 | unsigned char *version_bitmap; | |
1803 | unsigned int nat_segs, nat_blocks; | |
1804 | ||
1805 | nm_i->nat_blkaddr = le32_to_cpu(sb_raw->nat_blkaddr); | |
1806 | ||
1807 | /* segment_count_nat includes pair segment so divide to 2. */ | |
1808 | nat_segs = le32_to_cpu(sb_raw->segment_count_nat) >> 1; | |
1809 | nat_blocks = nat_segs << le32_to_cpu(sb_raw->log_blocks_per_seg); | |
1810 | nm_i->max_nid = NAT_ENTRY_PER_BLOCK * nat_blocks; | |
1811 | nm_i->fcnt = 0; | |
1812 | nm_i->nat_cnt = 0; | |
1813 | ||
1814 | INIT_LIST_HEAD(&nm_i->free_nid_list); | |
1815 | INIT_RADIX_TREE(&nm_i->nat_root, GFP_ATOMIC); | |
1816 | INIT_LIST_HEAD(&nm_i->nat_entries); | |
1817 | INIT_LIST_HEAD(&nm_i->dirty_nat_entries); | |
1818 | ||
1819 | mutex_init(&nm_i->build_lock); | |
1820 | spin_lock_init(&nm_i->free_nid_list_lock); | |
1821 | rwlock_init(&nm_i->nat_tree_lock); | |
1822 | ||
e05df3b1 | 1823 | nm_i->next_scan_nid = le32_to_cpu(sbi->ckpt->next_free_nid); |
79b5793b | 1824 | nm_i->bitmap_size = __bitmap_size(sbi, NAT_BITMAP); |
e05df3b1 JK |
1825 | version_bitmap = __bitmap_ptr(sbi, NAT_BITMAP); |
1826 | if (!version_bitmap) | |
1827 | return -EFAULT; | |
1828 | ||
79b5793b AG |
1829 | nm_i->nat_bitmap = kmemdup(version_bitmap, nm_i->bitmap_size, |
1830 | GFP_KERNEL); | |
1831 | if (!nm_i->nat_bitmap) | |
1832 | return -ENOMEM; | |
e05df3b1 JK |
1833 | return 0; |
1834 | } | |
1835 | ||
1836 | int build_node_manager(struct f2fs_sb_info *sbi) | |
1837 | { | |
1838 | int err; | |
1839 | ||
1840 | sbi->nm_info = kzalloc(sizeof(struct f2fs_nm_info), GFP_KERNEL); | |
1841 | if (!sbi->nm_info) | |
1842 | return -ENOMEM; | |
1843 | ||
1844 | err = init_node_manager(sbi); | |
1845 | if (err) | |
1846 | return err; | |
1847 | ||
1848 | build_free_nids(sbi); | |
1849 | return 0; | |
1850 | } | |
1851 | ||
1852 | void destroy_node_manager(struct f2fs_sb_info *sbi) | |
1853 | { | |
1854 | struct f2fs_nm_info *nm_i = NM_I(sbi); | |
1855 | struct free_nid *i, *next_i; | |
1856 | struct nat_entry *natvec[NATVEC_SIZE]; | |
1857 | nid_t nid = 0; | |
1858 | unsigned int found; | |
1859 | ||
1860 | if (!nm_i) | |
1861 | return; | |
1862 | ||
1863 | /* destroy free nid list */ | |
1864 | spin_lock(&nm_i->free_nid_list_lock); | |
1865 | list_for_each_entry_safe(i, next_i, &nm_i->free_nid_list, list) { | |
5d56b671 | 1866 | f2fs_bug_on(i->state == NID_ALLOC); |
e05df3b1 JK |
1867 | __del_from_free_nid_list(i); |
1868 | nm_i->fcnt--; | |
1869 | } | |
5d56b671 | 1870 | f2fs_bug_on(nm_i->fcnt); |
e05df3b1 JK |
1871 | spin_unlock(&nm_i->free_nid_list_lock); |
1872 | ||
1873 | /* destroy nat cache */ | |
1874 | write_lock(&nm_i->nat_tree_lock); | |
1875 | while ((found = __gang_lookup_nat_cache(nm_i, | |
1876 | nid, NATVEC_SIZE, natvec))) { | |
1877 | unsigned idx; | |
1878 | for (idx = 0; idx < found; idx++) { | |
1879 | struct nat_entry *e = natvec[idx]; | |
1880 | nid = nat_get_nid(e) + 1; | |
1881 | __del_from_nat_cache(nm_i, e); | |
1882 | } | |
1883 | } | |
5d56b671 | 1884 | f2fs_bug_on(nm_i->nat_cnt); |
e05df3b1 JK |
1885 | write_unlock(&nm_i->nat_tree_lock); |
1886 | ||
1887 | kfree(nm_i->nat_bitmap); | |
1888 | sbi->nm_info = NULL; | |
1889 | kfree(nm_i); | |
1890 | } | |
1891 | ||
6e6093a8 | 1892 | int __init create_node_manager_caches(void) |
e05df3b1 JK |
1893 | { |
1894 | nat_entry_slab = f2fs_kmem_cache_create("nat_entry", | |
1895 | sizeof(struct nat_entry), NULL); | |
1896 | if (!nat_entry_slab) | |
1897 | return -ENOMEM; | |
1898 | ||
1899 | free_nid_slab = f2fs_kmem_cache_create("free_nid", | |
1900 | sizeof(struct free_nid), NULL); | |
1901 | if (!free_nid_slab) { | |
1902 | kmem_cache_destroy(nat_entry_slab); | |
1903 | return -ENOMEM; | |
1904 | } | |
1905 | return 0; | |
1906 | } | |
1907 | ||
1908 | void destroy_node_manager_caches(void) | |
1909 | { | |
1910 | kmem_cache_destroy(free_nid_slab); | |
1911 | kmem_cache_destroy(nat_entry_slab); | |
1912 | } |