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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 | ||
429511cd CY |
44 | /* |
45 | * give 25%, 25%, 50%, 50%, 50% memory for each components respectively | |
46 | */ | |
6fb03f3a | 47 | if (type == FREE_NIDS) { |
e5e7ea3c JK |
48 | mem_size = (nm_i->fcnt * sizeof(struct free_nid)) >> |
49 | PAGE_CACHE_SHIFT; | |
50 | res = mem_size < ((avail_ram * nm_i->ram_thresh / 100) >> 2); | |
6fb03f3a | 51 | } else if (type == NAT_ENTRIES) { |
e5e7ea3c JK |
52 | mem_size = (nm_i->nat_cnt * sizeof(struct nat_entry)) >> |
53 | PAGE_CACHE_SHIFT; | |
54 | res = mem_size < ((avail_ram * nm_i->ram_thresh / 100) >> 2); | |
e5e7ea3c JK |
55 | } else if (type == INO_ENTRIES) { |
56 | int i; | |
57 | ||
e5e7ea3c | 58 | for (i = 0; i <= UPDATE_INO; i++) |
67298804 CY |
59 | mem_size += (sbi->im[i].ino_num * |
60 | sizeof(struct ino_entry)) >> PAGE_CACHE_SHIFT; | |
e5e7ea3c | 61 | res = mem_size < ((avail_ram * nm_i->ram_thresh / 100) >> 1); |
429511cd CY |
62 | } else if (type == EXTENT_CACHE) { |
63 | mem_size = (sbi->total_ext_tree * sizeof(struct extent_tree) + | |
64 | atomic_read(&sbi->total_ext_node) * | |
65 | sizeof(struct extent_node)) >> PAGE_CACHE_SHIFT; | |
66 | res = mem_size < ((avail_ram * nm_i->ram_thresh / 100) >> 1); | |
1e84371f | 67 | } else { |
a88a341a | 68 | if (sbi->sb->s_bdi->wb.dirty_exceeded) |
1e84371f | 69 | return false; |
6fb03f3a JK |
70 | } |
71 | return res; | |
cdfc41c1 JK |
72 | } |
73 | ||
e05df3b1 JK |
74 | static void clear_node_page_dirty(struct page *page) |
75 | { | |
76 | struct address_space *mapping = page->mapping; | |
e05df3b1 JK |
77 | unsigned int long flags; |
78 | ||
79 | if (PageDirty(page)) { | |
80 | spin_lock_irqsave(&mapping->tree_lock, flags); | |
81 | radix_tree_tag_clear(&mapping->page_tree, | |
82 | page_index(page), | |
83 | PAGECACHE_TAG_DIRTY); | |
84 | spin_unlock_irqrestore(&mapping->tree_lock, flags); | |
85 | ||
86 | clear_page_dirty_for_io(page); | |
4081363f | 87 | dec_page_count(F2FS_M_SB(mapping), F2FS_DIRTY_NODES); |
e05df3b1 JK |
88 | } |
89 | ClearPageUptodate(page); | |
90 | } | |
91 | ||
92 | static struct page *get_current_nat_page(struct f2fs_sb_info *sbi, nid_t nid) | |
93 | { | |
94 | pgoff_t index = current_nat_addr(sbi, nid); | |
95 | return get_meta_page(sbi, index); | |
96 | } | |
97 | ||
98 | static struct page *get_next_nat_page(struct f2fs_sb_info *sbi, nid_t nid) | |
99 | { | |
100 | struct page *src_page; | |
101 | struct page *dst_page; | |
102 | pgoff_t src_off; | |
103 | pgoff_t dst_off; | |
104 | void *src_addr; | |
105 | void *dst_addr; | |
106 | struct f2fs_nm_info *nm_i = NM_I(sbi); | |
107 | ||
108 | src_off = current_nat_addr(sbi, nid); | |
109 | dst_off = next_nat_addr(sbi, src_off); | |
110 | ||
111 | /* get current nat block page with lock */ | |
112 | src_page = get_meta_page(sbi, src_off); | |
e05df3b1 | 113 | dst_page = grab_meta_page(sbi, dst_off); |
9850cf4a | 114 | f2fs_bug_on(sbi, PageDirty(src_page)); |
e05df3b1 JK |
115 | |
116 | src_addr = page_address(src_page); | |
117 | dst_addr = page_address(dst_page); | |
118 | memcpy(dst_addr, src_addr, PAGE_CACHE_SIZE); | |
119 | set_page_dirty(dst_page); | |
120 | f2fs_put_page(src_page, 1); | |
121 | ||
122 | set_to_next_nat(nm_i, nid); | |
123 | ||
124 | return dst_page; | |
125 | } | |
126 | ||
e05df3b1 JK |
127 | static struct nat_entry *__lookup_nat_cache(struct f2fs_nm_info *nm_i, nid_t n) |
128 | { | |
129 | return radix_tree_lookup(&nm_i->nat_root, n); | |
130 | } | |
131 | ||
132 | static unsigned int __gang_lookup_nat_cache(struct f2fs_nm_info *nm_i, | |
133 | nid_t start, unsigned int nr, struct nat_entry **ep) | |
134 | { | |
135 | return radix_tree_gang_lookup(&nm_i->nat_root, (void **)ep, start, nr); | |
136 | } | |
137 | ||
138 | static void __del_from_nat_cache(struct f2fs_nm_info *nm_i, struct nat_entry *e) | |
139 | { | |
140 | list_del(&e->list); | |
141 | radix_tree_delete(&nm_i->nat_root, nat_get_nid(e)); | |
142 | nm_i->nat_cnt--; | |
143 | kmem_cache_free(nat_entry_slab, e); | |
144 | } | |
145 | ||
309cc2b6 JK |
146 | static void __set_nat_cache_dirty(struct f2fs_nm_info *nm_i, |
147 | struct nat_entry *ne) | |
148 | { | |
149 | nid_t set = NAT_BLOCK_OFFSET(ne->ni.nid); | |
150 | struct nat_entry_set *head; | |
151 | ||
152 | if (get_nat_flag(ne, IS_DIRTY)) | |
153 | return; | |
9be32d72 | 154 | |
309cc2b6 JK |
155 | head = radix_tree_lookup(&nm_i->nat_set_root, set); |
156 | if (!head) { | |
80c54505 | 157 | head = f2fs_kmem_cache_alloc(nat_entry_set_slab, GFP_NOFS); |
309cc2b6 JK |
158 | |
159 | INIT_LIST_HEAD(&head->entry_list); | |
160 | INIT_LIST_HEAD(&head->set_list); | |
161 | head->set = set; | |
162 | head->entry_cnt = 0; | |
9be32d72 | 163 | f2fs_radix_tree_insert(&nm_i->nat_set_root, set, head); |
309cc2b6 JK |
164 | } |
165 | list_move_tail(&ne->list, &head->entry_list); | |
166 | nm_i->dirty_nat_cnt++; | |
167 | head->entry_cnt++; | |
168 | set_nat_flag(ne, IS_DIRTY, true); | |
169 | } | |
170 | ||
171 | static void __clear_nat_cache_dirty(struct f2fs_nm_info *nm_i, | |
172 | struct nat_entry *ne) | |
173 | { | |
20d047c8 | 174 | nid_t set = NAT_BLOCK_OFFSET(ne->ni.nid); |
309cc2b6 JK |
175 | struct nat_entry_set *head; |
176 | ||
177 | head = radix_tree_lookup(&nm_i->nat_set_root, set); | |
178 | if (head) { | |
179 | list_move_tail(&ne->list, &nm_i->nat_entries); | |
180 | set_nat_flag(ne, IS_DIRTY, false); | |
181 | head->entry_cnt--; | |
182 | nm_i->dirty_nat_cnt--; | |
183 | } | |
184 | } | |
185 | ||
186 | static unsigned int __gang_lookup_nat_set(struct f2fs_nm_info *nm_i, | |
187 | nid_t start, unsigned int nr, struct nat_entry_set **ep) | |
188 | { | |
189 | return radix_tree_gang_lookup(&nm_i->nat_set_root, (void **)ep, | |
190 | start, nr); | |
191 | } | |
192 | ||
2dcf51ab | 193 | int need_dentry_mark(struct f2fs_sb_info *sbi, nid_t nid) |
e05df3b1 JK |
194 | { |
195 | struct f2fs_nm_info *nm_i = NM_I(sbi); | |
196 | struct nat_entry *e; | |
2dcf51ab | 197 | bool need = false; |
e05df3b1 | 198 | |
8b26ef98 | 199 | down_read(&nm_i->nat_tree_lock); |
e05df3b1 | 200 | e = __lookup_nat_cache(nm_i, nid); |
2dcf51ab JK |
201 | if (e) { |
202 | if (!get_nat_flag(e, IS_CHECKPOINTED) && | |
203 | !get_nat_flag(e, HAS_FSYNCED_INODE)) | |
204 | need = true; | |
205 | } | |
8b26ef98 | 206 | up_read(&nm_i->nat_tree_lock); |
2dcf51ab | 207 | return need; |
e05df3b1 JK |
208 | } |
209 | ||
2dcf51ab | 210 | bool is_checkpointed_node(struct f2fs_sb_info *sbi, nid_t nid) |
479f40c4 JK |
211 | { |
212 | struct f2fs_nm_info *nm_i = NM_I(sbi); | |
213 | struct nat_entry *e; | |
2dcf51ab | 214 | bool is_cp = true; |
479f40c4 | 215 | |
8b26ef98 | 216 | down_read(&nm_i->nat_tree_lock); |
2dcf51ab JK |
217 | e = __lookup_nat_cache(nm_i, nid); |
218 | if (e && !get_nat_flag(e, IS_CHECKPOINTED)) | |
219 | is_cp = false; | |
8b26ef98 | 220 | up_read(&nm_i->nat_tree_lock); |
2dcf51ab | 221 | return is_cp; |
479f40c4 JK |
222 | } |
223 | ||
88bd02c9 | 224 | bool need_inode_block_update(struct f2fs_sb_info *sbi, nid_t ino) |
b6fe5873 JK |
225 | { |
226 | struct f2fs_nm_info *nm_i = NM_I(sbi); | |
227 | struct nat_entry *e; | |
88bd02c9 | 228 | bool need_update = true; |
b6fe5873 | 229 | |
8b26ef98 | 230 | down_read(&nm_i->nat_tree_lock); |
88bd02c9 JK |
231 | e = __lookup_nat_cache(nm_i, ino); |
232 | if (e && get_nat_flag(e, HAS_LAST_FSYNC) && | |
233 | (get_nat_flag(e, IS_CHECKPOINTED) || | |
234 | get_nat_flag(e, HAS_FSYNCED_INODE))) | |
235 | need_update = false; | |
8b26ef98 | 236 | up_read(&nm_i->nat_tree_lock); |
88bd02c9 | 237 | return need_update; |
b6fe5873 JK |
238 | } |
239 | ||
e05df3b1 JK |
240 | static struct nat_entry *grab_nat_entry(struct f2fs_nm_info *nm_i, nid_t nid) |
241 | { | |
242 | struct nat_entry *new; | |
243 | ||
80c54505 | 244 | new = f2fs_kmem_cache_alloc(nat_entry_slab, GFP_NOFS); |
9be32d72 | 245 | f2fs_radix_tree_insert(&nm_i->nat_root, nid, new); |
e05df3b1 JK |
246 | memset(new, 0, sizeof(struct nat_entry)); |
247 | nat_set_nid(new, nid); | |
88bd02c9 | 248 | nat_reset_flag(new); |
e05df3b1 JK |
249 | list_add_tail(&new->list, &nm_i->nat_entries); |
250 | nm_i->nat_cnt++; | |
251 | return new; | |
252 | } | |
253 | ||
254 | static void cache_nat_entry(struct f2fs_nm_info *nm_i, nid_t nid, | |
255 | struct f2fs_nat_entry *ne) | |
256 | { | |
257 | struct nat_entry *e; | |
9be32d72 | 258 | |
8b26ef98 | 259 | down_write(&nm_i->nat_tree_lock); |
e05df3b1 JK |
260 | e = __lookup_nat_cache(nm_i, nid); |
261 | if (!e) { | |
262 | e = grab_nat_entry(nm_i, nid); | |
94dac22e | 263 | node_info_from_raw_nat(&e->ni, ne); |
e05df3b1 | 264 | } |
8b26ef98 | 265 | up_write(&nm_i->nat_tree_lock); |
e05df3b1 JK |
266 | } |
267 | ||
268 | static void set_node_addr(struct f2fs_sb_info *sbi, struct node_info *ni, | |
479f40c4 | 269 | block_t new_blkaddr, bool fsync_done) |
e05df3b1 JK |
270 | { |
271 | struct f2fs_nm_info *nm_i = NM_I(sbi); | |
272 | struct nat_entry *e; | |
9be32d72 | 273 | |
8b26ef98 | 274 | down_write(&nm_i->nat_tree_lock); |
e05df3b1 JK |
275 | e = __lookup_nat_cache(nm_i, ni->nid); |
276 | if (!e) { | |
277 | e = grab_nat_entry(nm_i, ni->nid); | |
5c27f4ee | 278 | copy_node_info(&e->ni, ni); |
9850cf4a | 279 | f2fs_bug_on(sbi, ni->blk_addr == NEW_ADDR); |
e05df3b1 JK |
280 | } else if (new_blkaddr == NEW_ADDR) { |
281 | /* | |
282 | * when nid is reallocated, | |
283 | * previous nat entry can be remained in nat cache. | |
284 | * So, reinitialize it with new information. | |
285 | */ | |
5c27f4ee | 286 | copy_node_info(&e->ni, ni); |
9850cf4a | 287 | f2fs_bug_on(sbi, ni->blk_addr != NULL_ADDR); |
e05df3b1 JK |
288 | } |
289 | ||
e05df3b1 | 290 | /* sanity check */ |
9850cf4a JK |
291 | f2fs_bug_on(sbi, nat_get_blkaddr(e) != ni->blk_addr); |
292 | f2fs_bug_on(sbi, nat_get_blkaddr(e) == NULL_ADDR && | |
e05df3b1 | 293 | new_blkaddr == NULL_ADDR); |
9850cf4a | 294 | f2fs_bug_on(sbi, nat_get_blkaddr(e) == NEW_ADDR && |
e05df3b1 | 295 | new_blkaddr == NEW_ADDR); |
9850cf4a | 296 | f2fs_bug_on(sbi, nat_get_blkaddr(e) != NEW_ADDR && |
e05df3b1 JK |
297 | nat_get_blkaddr(e) != NULL_ADDR && |
298 | new_blkaddr == NEW_ADDR); | |
299 | ||
e1c42045 | 300 | /* increment version no as node is removed */ |
e05df3b1 JK |
301 | if (nat_get_blkaddr(e) != NEW_ADDR && new_blkaddr == NULL_ADDR) { |
302 | unsigned char version = nat_get_version(e); | |
303 | nat_set_version(e, inc_node_version(version)); | |
26834466 JK |
304 | |
305 | /* in order to reuse the nid */ | |
306 | if (nm_i->next_scan_nid > ni->nid) | |
307 | nm_i->next_scan_nid = ni->nid; | |
e05df3b1 JK |
308 | } |
309 | ||
310 | /* change address */ | |
311 | nat_set_blkaddr(e, new_blkaddr); | |
88bd02c9 JK |
312 | if (new_blkaddr == NEW_ADDR || new_blkaddr == NULL_ADDR) |
313 | set_nat_flag(e, IS_CHECKPOINTED, false); | |
e05df3b1 | 314 | __set_nat_cache_dirty(nm_i, e); |
479f40c4 JK |
315 | |
316 | /* update fsync_mark if its inode nat entry is still alive */ | |
d5b692b7 CY |
317 | if (ni->nid != ni->ino) |
318 | e = __lookup_nat_cache(nm_i, ni->ino); | |
88bd02c9 JK |
319 | if (e) { |
320 | if (fsync_done && ni->nid == ni->ino) | |
321 | set_nat_flag(e, HAS_FSYNCED_INODE, true); | |
322 | set_nat_flag(e, HAS_LAST_FSYNC, fsync_done); | |
323 | } | |
8b26ef98 | 324 | up_write(&nm_i->nat_tree_lock); |
e05df3b1 JK |
325 | } |
326 | ||
4660f9c0 | 327 | int try_to_free_nats(struct f2fs_sb_info *sbi, int nr_shrink) |
e05df3b1 JK |
328 | { |
329 | struct f2fs_nm_info *nm_i = NM_I(sbi); | |
1b38dc8e | 330 | int nr = nr_shrink; |
e05df3b1 | 331 | |
1b38dc8e | 332 | if (!down_write_trylock(&nm_i->nat_tree_lock)) |
e05df3b1 JK |
333 | return 0; |
334 | ||
e05df3b1 JK |
335 | while (nr_shrink && !list_empty(&nm_i->nat_entries)) { |
336 | struct nat_entry *ne; | |
337 | ne = list_first_entry(&nm_i->nat_entries, | |
338 | struct nat_entry, list); | |
339 | __del_from_nat_cache(nm_i, ne); | |
340 | nr_shrink--; | |
341 | } | |
8b26ef98 | 342 | up_write(&nm_i->nat_tree_lock); |
1b38dc8e | 343 | return nr - nr_shrink; |
e05df3b1 JK |
344 | } |
345 | ||
0a8165d7 | 346 | /* |
e1c42045 | 347 | * This function always returns success |
e05df3b1 JK |
348 | */ |
349 | void get_node_info(struct f2fs_sb_info *sbi, nid_t nid, struct node_info *ni) | |
350 | { | |
351 | struct f2fs_nm_info *nm_i = NM_I(sbi); | |
352 | struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); | |
353 | struct f2fs_summary_block *sum = curseg->sum_blk; | |
354 | nid_t start_nid = START_NID(nid); | |
355 | struct f2fs_nat_block *nat_blk; | |
356 | struct page *page = NULL; | |
357 | struct f2fs_nat_entry ne; | |
358 | struct nat_entry *e; | |
359 | int i; | |
360 | ||
361 | ni->nid = nid; | |
362 | ||
363 | /* Check nat cache */ | |
8b26ef98 | 364 | down_read(&nm_i->nat_tree_lock); |
e05df3b1 JK |
365 | e = __lookup_nat_cache(nm_i, nid); |
366 | if (e) { | |
367 | ni->ino = nat_get_ino(e); | |
368 | ni->blk_addr = nat_get_blkaddr(e); | |
369 | ni->version = nat_get_version(e); | |
370 | } | |
8b26ef98 | 371 | up_read(&nm_i->nat_tree_lock); |
e05df3b1 JK |
372 | if (e) |
373 | return; | |
374 | ||
3547ea96 JK |
375 | memset(&ne, 0, sizeof(struct f2fs_nat_entry)); |
376 | ||
e05df3b1 JK |
377 | /* Check current segment summary */ |
378 | mutex_lock(&curseg->curseg_mutex); | |
379 | i = lookup_journal_in_cursum(sum, NAT_JOURNAL, nid, 0); | |
380 | if (i >= 0) { | |
381 | ne = nat_in_journal(sum, i); | |
382 | node_info_from_raw_nat(ni, &ne); | |
383 | } | |
384 | mutex_unlock(&curseg->curseg_mutex); | |
385 | if (i >= 0) | |
386 | goto cache; | |
387 | ||
388 | /* Fill node_info from nat page */ | |
389 | page = get_current_nat_page(sbi, start_nid); | |
390 | nat_blk = (struct f2fs_nat_block *)page_address(page); | |
391 | ne = nat_blk->entries[nid - start_nid]; | |
392 | node_info_from_raw_nat(ni, &ne); | |
393 | f2fs_put_page(page, 1); | |
394 | cache: | |
395 | /* cache nat entry */ | |
396 | cache_nat_entry(NM_I(sbi), nid, &ne); | |
397 | } | |
398 | ||
0a8165d7 | 399 | /* |
e05df3b1 JK |
400 | * The maximum depth is four. |
401 | * Offset[0] will have raw inode offset. | |
402 | */ | |
de93653f JK |
403 | static int get_node_path(struct f2fs_inode_info *fi, long block, |
404 | int offset[4], unsigned int noffset[4]) | |
e05df3b1 | 405 | { |
de93653f | 406 | const long direct_index = ADDRS_PER_INODE(fi); |
e05df3b1 JK |
407 | const long direct_blks = ADDRS_PER_BLOCK; |
408 | const long dptrs_per_blk = NIDS_PER_BLOCK; | |
409 | const long indirect_blks = ADDRS_PER_BLOCK * NIDS_PER_BLOCK; | |
410 | const long dindirect_blks = indirect_blks * NIDS_PER_BLOCK; | |
411 | int n = 0; | |
412 | int level = 0; | |
413 | ||
414 | noffset[0] = 0; | |
415 | ||
416 | if (block < direct_index) { | |
25c0a6e5 | 417 | offset[n] = block; |
e05df3b1 JK |
418 | goto got; |
419 | } | |
420 | block -= direct_index; | |
421 | if (block < direct_blks) { | |
422 | offset[n++] = NODE_DIR1_BLOCK; | |
423 | noffset[n] = 1; | |
25c0a6e5 | 424 | offset[n] = block; |
e05df3b1 JK |
425 | level = 1; |
426 | goto got; | |
427 | } | |
428 | block -= direct_blks; | |
429 | if (block < direct_blks) { | |
430 | offset[n++] = NODE_DIR2_BLOCK; | |
431 | noffset[n] = 2; | |
25c0a6e5 | 432 | offset[n] = block; |
e05df3b1 JK |
433 | level = 1; |
434 | goto got; | |
435 | } | |
436 | block -= direct_blks; | |
437 | if (block < indirect_blks) { | |
438 | offset[n++] = NODE_IND1_BLOCK; | |
439 | noffset[n] = 3; | |
440 | offset[n++] = block / direct_blks; | |
441 | noffset[n] = 4 + 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 < indirect_blks) { | |
448 | offset[n++] = NODE_IND2_BLOCK; | |
449 | noffset[n] = 4 + dptrs_per_blk; | |
450 | offset[n++] = block / direct_blks; | |
451 | noffset[n] = 5 + dptrs_per_blk + offset[n - 1]; | |
25c0a6e5 | 452 | offset[n] = block % direct_blks; |
e05df3b1 JK |
453 | level = 2; |
454 | goto got; | |
455 | } | |
456 | block -= indirect_blks; | |
457 | if (block < dindirect_blks) { | |
458 | offset[n++] = NODE_DIND_BLOCK; | |
459 | noffset[n] = 5 + (dptrs_per_blk * 2); | |
460 | offset[n++] = block / indirect_blks; | |
461 | noffset[n] = 6 + (dptrs_per_blk * 2) + | |
462 | offset[n - 1] * (dptrs_per_blk + 1); | |
463 | offset[n++] = (block / direct_blks) % dptrs_per_blk; | |
464 | noffset[n] = 7 + (dptrs_per_blk * 2) + | |
465 | offset[n - 2] * (dptrs_per_blk + 1) + | |
466 | offset[n - 1]; | |
25c0a6e5 | 467 | offset[n] = block % direct_blks; |
e05df3b1 JK |
468 | level = 3; |
469 | goto got; | |
470 | } else { | |
471 | BUG(); | |
472 | } | |
473 | got: | |
474 | return level; | |
475 | } | |
476 | ||
477 | /* | |
478 | * Caller should call f2fs_put_dnode(dn). | |
4f4124d0 CY |
479 | * Also, it should grab and release a rwsem by calling f2fs_lock_op() and |
480 | * f2fs_unlock_op() only if ro is not set RDONLY_NODE. | |
39936837 | 481 | * In the case of RDONLY_NODE, we don't need to care about mutex. |
e05df3b1 | 482 | */ |
266e97a8 | 483 | int get_dnode_of_data(struct dnode_of_data *dn, pgoff_t index, int mode) |
e05df3b1 | 484 | { |
4081363f | 485 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
e05df3b1 | 486 | struct page *npage[4]; |
f1a3b98e | 487 | struct page *parent = NULL; |
e05df3b1 JK |
488 | int offset[4]; |
489 | unsigned int noffset[4]; | |
490 | nid_t nids[4]; | |
491 | int level, i; | |
492 | int err = 0; | |
493 | ||
de93653f | 494 | level = get_node_path(F2FS_I(dn->inode), index, offset, noffset); |
e05df3b1 JK |
495 | |
496 | nids[0] = dn->inode->i_ino; | |
1646cfac | 497 | npage[0] = dn->inode_page; |
e05df3b1 | 498 | |
1646cfac JK |
499 | if (!npage[0]) { |
500 | npage[0] = get_node_page(sbi, nids[0]); | |
501 | if (IS_ERR(npage[0])) | |
502 | return PTR_ERR(npage[0]); | |
503 | } | |
f1a3b98e JK |
504 | |
505 | /* if inline_data is set, should not report any block indices */ | |
506 | if (f2fs_has_inline_data(dn->inode) && index) { | |
76629165 | 507 | err = -ENOENT; |
f1a3b98e JK |
508 | f2fs_put_page(npage[0], 1); |
509 | goto release_out; | |
510 | } | |
511 | ||
e05df3b1 | 512 | parent = npage[0]; |
52c2db3f CL |
513 | if (level != 0) |
514 | nids[1] = get_nid(parent, offset[0], true); | |
e05df3b1 JK |
515 | dn->inode_page = npage[0]; |
516 | dn->inode_page_locked = true; | |
517 | ||
518 | /* get indirect or direct nodes */ | |
519 | for (i = 1; i <= level; i++) { | |
520 | bool done = false; | |
521 | ||
266e97a8 | 522 | if (!nids[i] && mode == ALLOC_NODE) { |
e05df3b1 JK |
523 | /* alloc new node */ |
524 | if (!alloc_nid(sbi, &(nids[i]))) { | |
e05df3b1 JK |
525 | err = -ENOSPC; |
526 | goto release_pages; | |
527 | } | |
528 | ||
529 | dn->nid = nids[i]; | |
8ae8f162 | 530 | npage[i] = new_node_page(dn, noffset[i], NULL); |
e05df3b1 JK |
531 | if (IS_ERR(npage[i])) { |
532 | alloc_nid_failed(sbi, nids[i]); | |
e05df3b1 JK |
533 | err = PTR_ERR(npage[i]); |
534 | goto release_pages; | |
535 | } | |
536 | ||
537 | set_nid(parent, offset[i - 1], nids[i], i == 1); | |
538 | alloc_nid_done(sbi, nids[i]); | |
e05df3b1 | 539 | done = true; |
266e97a8 | 540 | } else if (mode == LOOKUP_NODE_RA && i == level && level > 1) { |
e05df3b1 JK |
541 | npage[i] = get_node_page_ra(parent, offset[i - 1]); |
542 | if (IS_ERR(npage[i])) { | |
543 | err = PTR_ERR(npage[i]); | |
544 | goto release_pages; | |
545 | } | |
546 | done = true; | |
547 | } | |
548 | if (i == 1) { | |
549 | dn->inode_page_locked = false; | |
550 | unlock_page(parent); | |
551 | } else { | |
552 | f2fs_put_page(parent, 1); | |
553 | } | |
554 | ||
555 | if (!done) { | |
556 | npage[i] = get_node_page(sbi, nids[i]); | |
557 | if (IS_ERR(npage[i])) { | |
558 | err = PTR_ERR(npage[i]); | |
559 | f2fs_put_page(npage[0], 0); | |
560 | goto release_out; | |
561 | } | |
562 | } | |
563 | if (i < level) { | |
564 | parent = npage[i]; | |
565 | nids[i + 1] = get_nid(parent, offset[i], false); | |
566 | } | |
567 | } | |
568 | dn->nid = nids[level]; | |
569 | dn->ofs_in_node = offset[level]; | |
570 | dn->node_page = npage[level]; | |
571 | dn->data_blkaddr = datablock_addr(dn->node_page, dn->ofs_in_node); | |
572 | return 0; | |
573 | ||
574 | release_pages: | |
575 | f2fs_put_page(parent, 1); | |
576 | if (i > 1) | |
577 | f2fs_put_page(npage[0], 0); | |
578 | release_out: | |
579 | dn->inode_page = NULL; | |
580 | dn->node_page = NULL; | |
581 | return err; | |
582 | } | |
583 | ||
584 | static void truncate_node(struct dnode_of_data *dn) | |
585 | { | |
4081363f | 586 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
e05df3b1 JK |
587 | struct node_info ni; |
588 | ||
589 | get_node_info(sbi, dn->nid, &ni); | |
71e9fec5 | 590 | if (dn->inode->i_blocks == 0) { |
9850cf4a | 591 | f2fs_bug_on(sbi, ni.blk_addr != NULL_ADDR); |
71e9fec5 JK |
592 | goto invalidate; |
593 | } | |
9850cf4a | 594 | f2fs_bug_on(sbi, ni.blk_addr == NULL_ADDR); |
e05df3b1 | 595 | |
e05df3b1 | 596 | /* Deallocate node address */ |
71e9fec5 | 597 | invalidate_blocks(sbi, ni.blk_addr); |
ef86d709 | 598 | dec_valid_node_count(sbi, dn->inode); |
479f40c4 | 599 | set_node_addr(sbi, &ni, NULL_ADDR, false); |
e05df3b1 JK |
600 | |
601 | if (dn->nid == dn->inode->i_ino) { | |
602 | remove_orphan_inode(sbi, dn->nid); | |
603 | dec_valid_inode_count(sbi); | |
604 | } else { | |
605 | sync_inode_page(dn); | |
606 | } | |
71e9fec5 | 607 | invalidate: |
e05df3b1 | 608 | clear_node_page_dirty(dn->node_page); |
caf0047e | 609 | set_sbi_flag(sbi, SBI_IS_DIRTY); |
e05df3b1 JK |
610 | |
611 | f2fs_put_page(dn->node_page, 1); | |
bf39c00a JK |
612 | |
613 | invalidate_mapping_pages(NODE_MAPPING(sbi), | |
614 | dn->node_page->index, dn->node_page->index); | |
615 | ||
e05df3b1 | 616 | dn->node_page = NULL; |
51dd6249 | 617 | trace_f2fs_truncate_node(dn->inode, dn->nid, ni.blk_addr); |
e05df3b1 JK |
618 | } |
619 | ||
620 | static int truncate_dnode(struct dnode_of_data *dn) | |
621 | { | |
e05df3b1 JK |
622 | struct page *page; |
623 | ||
624 | if (dn->nid == 0) | |
625 | return 1; | |
626 | ||
627 | /* get direct node */ | |
4081363f | 628 | page = get_node_page(F2FS_I_SB(dn->inode), dn->nid); |
e05df3b1 JK |
629 | if (IS_ERR(page) && PTR_ERR(page) == -ENOENT) |
630 | return 1; | |
631 | else if (IS_ERR(page)) | |
632 | return PTR_ERR(page); | |
633 | ||
634 | /* Make dnode_of_data for parameter */ | |
635 | dn->node_page = page; | |
636 | dn->ofs_in_node = 0; | |
637 | truncate_data_blocks(dn); | |
638 | truncate_node(dn); | |
639 | return 1; | |
640 | } | |
641 | ||
642 | static int truncate_nodes(struct dnode_of_data *dn, unsigned int nofs, | |
643 | int ofs, int depth) | |
644 | { | |
e05df3b1 JK |
645 | struct dnode_of_data rdn = *dn; |
646 | struct page *page; | |
647 | struct f2fs_node *rn; | |
648 | nid_t child_nid; | |
649 | unsigned int child_nofs; | |
650 | int freed = 0; | |
651 | int i, ret; | |
652 | ||
653 | if (dn->nid == 0) | |
654 | return NIDS_PER_BLOCK + 1; | |
655 | ||
51dd6249 NJ |
656 | trace_f2fs_truncate_nodes_enter(dn->inode, dn->nid, dn->data_blkaddr); |
657 | ||
4081363f | 658 | page = get_node_page(F2FS_I_SB(dn->inode), dn->nid); |
51dd6249 NJ |
659 | if (IS_ERR(page)) { |
660 | trace_f2fs_truncate_nodes_exit(dn->inode, PTR_ERR(page)); | |
e05df3b1 | 661 | return PTR_ERR(page); |
51dd6249 | 662 | } |
e05df3b1 | 663 | |
45590710 | 664 | rn = F2FS_NODE(page); |
e05df3b1 JK |
665 | if (depth < 3) { |
666 | for (i = ofs; i < NIDS_PER_BLOCK; i++, freed++) { | |
667 | child_nid = le32_to_cpu(rn->in.nid[i]); | |
668 | if (child_nid == 0) | |
669 | continue; | |
670 | rdn.nid = child_nid; | |
671 | ret = truncate_dnode(&rdn); | |
672 | if (ret < 0) | |
673 | goto out_err; | |
674 | set_nid(page, i, 0, false); | |
675 | } | |
676 | } else { | |
677 | child_nofs = nofs + ofs * (NIDS_PER_BLOCK + 1) + 1; | |
678 | for (i = ofs; i < NIDS_PER_BLOCK; i++) { | |
679 | child_nid = le32_to_cpu(rn->in.nid[i]); | |
680 | if (child_nid == 0) { | |
681 | child_nofs += NIDS_PER_BLOCK + 1; | |
682 | continue; | |
683 | } | |
684 | rdn.nid = child_nid; | |
685 | ret = truncate_nodes(&rdn, child_nofs, 0, depth - 1); | |
686 | if (ret == (NIDS_PER_BLOCK + 1)) { | |
687 | set_nid(page, i, 0, false); | |
688 | child_nofs += ret; | |
689 | } else if (ret < 0 && ret != -ENOENT) { | |
690 | goto out_err; | |
691 | } | |
692 | } | |
693 | freed = child_nofs; | |
694 | } | |
695 | ||
696 | if (!ofs) { | |
697 | /* remove current indirect node */ | |
698 | dn->node_page = page; | |
699 | truncate_node(dn); | |
700 | freed++; | |
701 | } else { | |
702 | f2fs_put_page(page, 1); | |
703 | } | |
51dd6249 | 704 | trace_f2fs_truncate_nodes_exit(dn->inode, freed); |
e05df3b1 JK |
705 | return freed; |
706 | ||
707 | out_err: | |
708 | f2fs_put_page(page, 1); | |
51dd6249 | 709 | trace_f2fs_truncate_nodes_exit(dn->inode, ret); |
e05df3b1 JK |
710 | return ret; |
711 | } | |
712 | ||
713 | static int truncate_partial_nodes(struct dnode_of_data *dn, | |
714 | struct f2fs_inode *ri, int *offset, int depth) | |
715 | { | |
e05df3b1 JK |
716 | struct page *pages[2]; |
717 | nid_t nid[3]; | |
718 | nid_t child_nid; | |
719 | int err = 0; | |
720 | int i; | |
721 | int idx = depth - 2; | |
722 | ||
723 | nid[0] = le32_to_cpu(ri->i_nid[offset[0] - NODE_DIR1_BLOCK]); | |
724 | if (!nid[0]) | |
725 | return 0; | |
726 | ||
727 | /* get indirect nodes in the path */ | |
a225dca3 | 728 | for (i = 0; i < idx + 1; i++) { |
e1c42045 | 729 | /* reference count'll be increased */ |
4081363f | 730 | pages[i] = get_node_page(F2FS_I_SB(dn->inode), nid[i]); |
e05df3b1 | 731 | if (IS_ERR(pages[i])) { |
e05df3b1 | 732 | err = PTR_ERR(pages[i]); |
a225dca3 | 733 | idx = i - 1; |
e05df3b1 JK |
734 | goto fail; |
735 | } | |
736 | nid[i + 1] = get_nid(pages[i], offset[i + 1], false); | |
737 | } | |
738 | ||
739 | /* free direct nodes linked to a partial indirect node */ | |
a225dca3 | 740 | for (i = offset[idx + 1]; i < NIDS_PER_BLOCK; i++) { |
e05df3b1 JK |
741 | child_nid = get_nid(pages[idx], i, false); |
742 | if (!child_nid) | |
743 | continue; | |
744 | dn->nid = child_nid; | |
745 | err = truncate_dnode(dn); | |
746 | if (err < 0) | |
747 | goto fail; | |
748 | set_nid(pages[idx], i, 0, false); | |
749 | } | |
750 | ||
a225dca3 | 751 | if (offset[idx + 1] == 0) { |
e05df3b1 JK |
752 | dn->node_page = pages[idx]; |
753 | dn->nid = nid[idx]; | |
754 | truncate_node(dn); | |
755 | } else { | |
756 | f2fs_put_page(pages[idx], 1); | |
757 | } | |
758 | offset[idx]++; | |
a225dca3 | 759 | offset[idx + 1] = 0; |
760 | idx--; | |
e05df3b1 | 761 | fail: |
a225dca3 | 762 | for (i = idx; i >= 0; i--) |
e05df3b1 | 763 | f2fs_put_page(pages[i], 1); |
51dd6249 NJ |
764 | |
765 | trace_f2fs_truncate_partial_nodes(dn->inode, nid, depth, err); | |
766 | ||
e05df3b1 JK |
767 | return err; |
768 | } | |
769 | ||
0a8165d7 | 770 | /* |
e05df3b1 JK |
771 | * All the block addresses of data and nodes should be nullified. |
772 | */ | |
773 | int truncate_inode_blocks(struct inode *inode, pgoff_t from) | |
774 | { | |
4081363f | 775 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
e05df3b1 JK |
776 | int err = 0, cont = 1; |
777 | int level, offset[4], noffset[4]; | |
7dd690c8 | 778 | unsigned int nofs = 0; |
58bfaf44 | 779 | struct f2fs_inode *ri; |
e05df3b1 JK |
780 | struct dnode_of_data dn; |
781 | struct page *page; | |
782 | ||
51dd6249 NJ |
783 | trace_f2fs_truncate_inode_blocks_enter(inode, from); |
784 | ||
de93653f | 785 | level = get_node_path(F2FS_I(inode), from, offset, noffset); |
afcb7ca0 | 786 | restart: |
e05df3b1 | 787 | page = get_node_page(sbi, inode->i_ino); |
51dd6249 NJ |
788 | if (IS_ERR(page)) { |
789 | trace_f2fs_truncate_inode_blocks_exit(inode, PTR_ERR(page)); | |
e05df3b1 | 790 | return PTR_ERR(page); |
51dd6249 | 791 | } |
e05df3b1 JK |
792 | |
793 | set_new_dnode(&dn, inode, page, NULL, 0); | |
794 | unlock_page(page); | |
795 | ||
58bfaf44 | 796 | ri = F2FS_INODE(page); |
e05df3b1 JK |
797 | switch (level) { |
798 | case 0: | |
799 | case 1: | |
800 | nofs = noffset[1]; | |
801 | break; | |
802 | case 2: | |
803 | nofs = noffset[1]; | |
804 | if (!offset[level - 1]) | |
805 | goto skip_partial; | |
58bfaf44 | 806 | err = truncate_partial_nodes(&dn, ri, offset, level); |
e05df3b1 JK |
807 | if (err < 0 && err != -ENOENT) |
808 | goto fail; | |
809 | nofs += 1 + NIDS_PER_BLOCK; | |
810 | break; | |
811 | case 3: | |
812 | nofs = 5 + 2 * NIDS_PER_BLOCK; | |
813 | if (!offset[level - 1]) | |
814 | goto skip_partial; | |
58bfaf44 | 815 | err = truncate_partial_nodes(&dn, ri, offset, level); |
e05df3b1 JK |
816 | if (err < 0 && err != -ENOENT) |
817 | goto fail; | |
818 | break; | |
819 | default: | |
820 | BUG(); | |
821 | } | |
822 | ||
823 | skip_partial: | |
824 | while (cont) { | |
58bfaf44 | 825 | dn.nid = le32_to_cpu(ri->i_nid[offset[0] - NODE_DIR1_BLOCK]); |
e05df3b1 JK |
826 | switch (offset[0]) { |
827 | case NODE_DIR1_BLOCK: | |
828 | case NODE_DIR2_BLOCK: | |
829 | err = truncate_dnode(&dn); | |
830 | break; | |
831 | ||
832 | case NODE_IND1_BLOCK: | |
833 | case NODE_IND2_BLOCK: | |
834 | err = truncate_nodes(&dn, nofs, offset[1], 2); | |
835 | break; | |
836 | ||
837 | case NODE_DIND_BLOCK: | |
838 | err = truncate_nodes(&dn, nofs, offset[1], 3); | |
839 | cont = 0; | |
840 | break; | |
841 | ||
842 | default: | |
843 | BUG(); | |
844 | } | |
845 | if (err < 0 && err != -ENOENT) | |
846 | goto fail; | |
847 | if (offset[1] == 0 && | |
58bfaf44 | 848 | ri->i_nid[offset[0] - NODE_DIR1_BLOCK]) { |
e05df3b1 | 849 | lock_page(page); |
4ef51a8f | 850 | if (unlikely(page->mapping != NODE_MAPPING(sbi))) { |
afcb7ca0 JK |
851 | f2fs_put_page(page, 1); |
852 | goto restart; | |
853 | } | |
3cb5ad15 | 854 | f2fs_wait_on_page_writeback(page, NODE); |
58bfaf44 | 855 | ri->i_nid[offset[0] - NODE_DIR1_BLOCK] = 0; |
e05df3b1 JK |
856 | set_page_dirty(page); |
857 | unlock_page(page); | |
858 | } | |
859 | offset[1] = 0; | |
860 | offset[0]++; | |
861 | nofs += err; | |
862 | } | |
863 | fail: | |
864 | f2fs_put_page(page, 0); | |
51dd6249 | 865 | trace_f2fs_truncate_inode_blocks_exit(inode, err); |
e05df3b1 JK |
866 | return err > 0 ? 0 : err; |
867 | } | |
868 | ||
4f16fb0f JK |
869 | int truncate_xattr_node(struct inode *inode, struct page *page) |
870 | { | |
4081363f | 871 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
4f16fb0f JK |
872 | nid_t nid = F2FS_I(inode)->i_xattr_nid; |
873 | struct dnode_of_data dn; | |
874 | struct page *npage; | |
875 | ||
876 | if (!nid) | |
877 | return 0; | |
878 | ||
879 | npage = get_node_page(sbi, nid); | |
880 | if (IS_ERR(npage)) | |
881 | return PTR_ERR(npage); | |
882 | ||
883 | F2FS_I(inode)->i_xattr_nid = 0; | |
65985d93 JK |
884 | |
885 | /* need to do checkpoint during fsync */ | |
886 | F2FS_I(inode)->xattr_ver = cur_cp_version(F2FS_CKPT(sbi)); | |
887 | ||
4f16fb0f JK |
888 | set_new_dnode(&dn, inode, page, npage, nid); |
889 | ||
890 | if (page) | |
01d2d1aa | 891 | dn.inode_page_locked = true; |
4f16fb0f JK |
892 | truncate_node(&dn); |
893 | return 0; | |
894 | } | |
895 | ||
39936837 | 896 | /* |
4f4124d0 CY |
897 | * Caller should grab and release a rwsem by calling f2fs_lock_op() and |
898 | * f2fs_unlock_op(). | |
39936837 | 899 | */ |
13ec7297 | 900 | int remove_inode_page(struct inode *inode) |
e05df3b1 | 901 | { |
e05df3b1 | 902 | struct dnode_of_data dn; |
13ec7297 | 903 | int err; |
e05df3b1 | 904 | |
c2e69583 | 905 | set_new_dnode(&dn, inode, NULL, NULL, inode->i_ino); |
13ec7297 CY |
906 | err = get_dnode_of_data(&dn, 0, LOOKUP_NODE); |
907 | if (err) | |
908 | return err; | |
e05df3b1 | 909 | |
13ec7297 CY |
910 | err = truncate_xattr_node(inode, dn.inode_page); |
911 | if (err) { | |
c2e69583 | 912 | f2fs_put_dnode(&dn); |
13ec7297 | 913 | return err; |
e05df3b1 | 914 | } |
c2e69583 JK |
915 | |
916 | /* remove potential inline_data blocks */ | |
917 | if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
918 | S_ISLNK(inode->i_mode)) | |
919 | truncate_data_blocks_range(&dn, 1); | |
920 | ||
e1c42045 | 921 | /* 0 is possible, after f2fs_new_inode() has failed */ |
9850cf4a JK |
922 | f2fs_bug_on(F2FS_I_SB(inode), |
923 | inode->i_blocks != 0 && inode->i_blocks != 1); | |
c2e69583 JK |
924 | |
925 | /* will put inode & node pages */ | |
71e9fec5 | 926 | truncate_node(&dn); |
13ec7297 | 927 | return 0; |
e05df3b1 JK |
928 | } |
929 | ||
a014e037 | 930 | struct page *new_inode_page(struct inode *inode) |
e05df3b1 | 931 | { |
e05df3b1 JK |
932 | struct dnode_of_data dn; |
933 | ||
934 | /* allocate inode page for new inode */ | |
935 | set_new_dnode(&dn, inode, NULL, NULL, inode->i_ino); | |
44a83ff6 JK |
936 | |
937 | /* caller should f2fs_put_page(page, 1); */ | |
8ae8f162 | 938 | return new_node_page(&dn, 0, NULL); |
e05df3b1 JK |
939 | } |
940 | ||
8ae8f162 JK |
941 | struct page *new_node_page(struct dnode_of_data *dn, |
942 | unsigned int ofs, struct page *ipage) | |
e05df3b1 | 943 | { |
4081363f | 944 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
e05df3b1 JK |
945 | struct node_info old_ni, new_ni; |
946 | struct page *page; | |
947 | int err; | |
948 | ||
6bacf52f | 949 | if (unlikely(is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC))) |
e05df3b1 JK |
950 | return ERR_PTR(-EPERM); |
951 | ||
54b591df | 952 | page = grab_cache_page(NODE_MAPPING(sbi), dn->nid); |
e05df3b1 JK |
953 | if (!page) |
954 | return ERR_PTR(-ENOMEM); | |
955 | ||
6bacf52f | 956 | if (unlikely(!inc_valid_node_count(sbi, dn->inode))) { |
9c02740c JK |
957 | err = -ENOSPC; |
958 | goto fail; | |
959 | } | |
e05df3b1 | 960 | |
9c02740c | 961 | get_node_info(sbi, dn->nid, &old_ni); |
e05df3b1 JK |
962 | |
963 | /* Reinitialize old_ni with new node page */ | |
9850cf4a | 964 | f2fs_bug_on(sbi, old_ni.blk_addr != NULL_ADDR); |
e05df3b1 JK |
965 | new_ni = old_ni; |
966 | new_ni.ino = dn->inode->i_ino; | |
479f40c4 | 967 | set_node_addr(sbi, &new_ni, NEW_ADDR, false); |
9c02740c | 968 | |
54b591df | 969 | f2fs_wait_on_page_writeback(page, NODE); |
9c02740c | 970 | fill_node_footer(page, dn->nid, dn->inode->i_ino, ofs, true); |
398b1ac5 | 971 | set_cold_node(dn->inode, page); |
9c02740c JK |
972 | SetPageUptodate(page); |
973 | set_page_dirty(page); | |
e05df3b1 | 974 | |
4bc8e9bc | 975 | if (f2fs_has_xattr_block(ofs)) |
479bd73a JK |
976 | F2FS_I(dn->inode)->i_xattr_nid = dn->nid; |
977 | ||
e05df3b1 | 978 | dn->node_page = page; |
8ae8f162 JK |
979 | if (ipage) |
980 | update_inode(dn->inode, ipage); | |
981 | else | |
982 | sync_inode_page(dn); | |
e05df3b1 JK |
983 | if (ofs == 0) |
984 | inc_valid_inode_count(sbi); | |
985 | ||
986 | return page; | |
987 | ||
988 | fail: | |
71e9fec5 | 989 | clear_node_page_dirty(page); |
e05df3b1 JK |
990 | f2fs_put_page(page, 1); |
991 | return ERR_PTR(err); | |
992 | } | |
993 | ||
56ae674c JK |
994 | /* |
995 | * Caller should do after getting the following values. | |
996 | * 0: f2fs_put_page(page, 0) | |
86531d6b | 997 | * LOCKED_PAGE or error: f2fs_put_page(page, 1) |
56ae674c | 998 | */ |
93dfe2ac | 999 | static int read_node_page(struct page *page, int rw) |
e05df3b1 | 1000 | { |
4081363f | 1001 | struct f2fs_sb_info *sbi = F2FS_P_SB(page); |
e05df3b1 | 1002 | struct node_info ni; |
cf04e8eb | 1003 | struct f2fs_io_info fio = { |
05ca3632 | 1004 | .sbi = sbi, |
cf04e8eb JK |
1005 | .type = NODE, |
1006 | .rw = rw, | |
05ca3632 | 1007 | .page = page, |
4375a336 | 1008 | .encrypted_page = NULL, |
cf04e8eb | 1009 | }; |
e05df3b1 JK |
1010 | |
1011 | get_node_info(sbi, page->index, &ni); | |
1012 | ||
6bacf52f | 1013 | if (unlikely(ni.blk_addr == NULL_ADDR)) { |
2bca1e23 | 1014 | ClearPageUptodate(page); |
e05df3b1 | 1015 | return -ENOENT; |
393ff91f JK |
1016 | } |
1017 | ||
56ae674c JK |
1018 | if (PageUptodate(page)) |
1019 | return LOCKED_PAGE; | |
393ff91f | 1020 | |
cf04e8eb | 1021 | fio.blk_addr = ni.blk_addr; |
05ca3632 | 1022 | return f2fs_submit_page_bio(&fio); |
e05df3b1 JK |
1023 | } |
1024 | ||
0a8165d7 | 1025 | /* |
e05df3b1 JK |
1026 | * Readahead a node page |
1027 | */ | |
1028 | void ra_node_page(struct f2fs_sb_info *sbi, nid_t nid) | |
1029 | { | |
e05df3b1 | 1030 | struct page *apage; |
56ae674c | 1031 | int err; |
e05df3b1 | 1032 | |
4ef51a8f | 1033 | apage = find_get_page(NODE_MAPPING(sbi), nid); |
393ff91f JK |
1034 | if (apage && PageUptodate(apage)) { |
1035 | f2fs_put_page(apage, 0); | |
1036 | return; | |
1037 | } | |
e05df3b1 JK |
1038 | f2fs_put_page(apage, 0); |
1039 | ||
4ef51a8f | 1040 | apage = grab_cache_page(NODE_MAPPING(sbi), nid); |
e05df3b1 JK |
1041 | if (!apage) |
1042 | return; | |
1043 | ||
56ae674c | 1044 | err = read_node_page(apage, READA); |
86531d6b | 1045 | f2fs_put_page(apage, err ? 1 : 0); |
e05df3b1 JK |
1046 | } |
1047 | ||
1048 | struct page *get_node_page(struct f2fs_sb_info *sbi, pgoff_t nid) | |
1049 | { | |
56ae674c JK |
1050 | struct page *page; |
1051 | int err; | |
afcb7ca0 | 1052 | repeat: |
54b591df | 1053 | page = grab_cache_page(NODE_MAPPING(sbi), nid); |
e05df3b1 JK |
1054 | if (!page) |
1055 | return ERR_PTR(-ENOMEM); | |
1056 | ||
1057 | err = read_node_page(page, READ_SYNC); | |
86531d6b JK |
1058 | if (err < 0) { |
1059 | f2fs_put_page(page, 1); | |
e05df3b1 | 1060 | return ERR_PTR(err); |
86531d6b | 1061 | } else if (err != LOCKED_PAGE) { |
aaf96075 | 1062 | lock_page(page); |
86531d6b | 1063 | } |
e05df3b1 | 1064 | |
3bb5e2c8 | 1065 | if (unlikely(!PageUptodate(page) || nid != nid_of_node(page))) { |
aaf96075 | 1066 | ClearPageUptodate(page); |
393ff91f JK |
1067 | f2fs_put_page(page, 1); |
1068 | return ERR_PTR(-EIO); | |
1069 | } | |
4ef51a8f | 1070 | if (unlikely(page->mapping != NODE_MAPPING(sbi))) { |
afcb7ca0 JK |
1071 | f2fs_put_page(page, 1); |
1072 | goto repeat; | |
1073 | } | |
e05df3b1 JK |
1074 | return page; |
1075 | } | |
1076 | ||
0a8165d7 | 1077 | /* |
e05df3b1 JK |
1078 | * Return a locked page for the desired node page. |
1079 | * And, readahead MAX_RA_NODE number of node pages. | |
1080 | */ | |
1081 | struct page *get_node_page_ra(struct page *parent, int start) | |
1082 | { | |
4081363f | 1083 | struct f2fs_sb_info *sbi = F2FS_P_SB(parent); |
c718379b | 1084 | struct blk_plug plug; |
e05df3b1 | 1085 | struct page *page; |
56ae674c JK |
1086 | int err, i, end; |
1087 | nid_t nid; | |
e05df3b1 JK |
1088 | |
1089 | /* First, try getting the desired direct node. */ | |
1090 | nid = get_nid(parent, start, false); | |
1091 | if (!nid) | |
1092 | return ERR_PTR(-ENOENT); | |
afcb7ca0 | 1093 | repeat: |
4ef51a8f | 1094 | page = grab_cache_page(NODE_MAPPING(sbi), nid); |
e05df3b1 JK |
1095 | if (!page) |
1096 | return ERR_PTR(-ENOMEM); | |
1097 | ||
66d36a29 | 1098 | err = read_node_page(page, READ_SYNC); |
86531d6b JK |
1099 | if (err < 0) { |
1100 | f2fs_put_page(page, 1); | |
e05df3b1 | 1101 | return ERR_PTR(err); |
86531d6b | 1102 | } else if (err == LOCKED_PAGE) { |
56ae674c | 1103 | goto page_hit; |
86531d6b | 1104 | } |
e05df3b1 | 1105 | |
c718379b JK |
1106 | blk_start_plug(&plug); |
1107 | ||
e05df3b1 JK |
1108 | /* Then, try readahead for siblings of the desired node */ |
1109 | end = start + MAX_RA_NODE; | |
1110 | end = min(end, NIDS_PER_BLOCK); | |
1111 | for (i = start + 1; i < end; i++) { | |
1112 | nid = get_nid(parent, i, false); | |
1113 | if (!nid) | |
1114 | continue; | |
1115 | ra_node_page(sbi, nid); | |
1116 | } | |
1117 | ||
c718379b JK |
1118 | blk_finish_plug(&plug); |
1119 | ||
e05df3b1 | 1120 | lock_page(page); |
4ef51a8f | 1121 | if (unlikely(page->mapping != NODE_MAPPING(sbi))) { |
afcb7ca0 JK |
1122 | f2fs_put_page(page, 1); |
1123 | goto repeat; | |
1124 | } | |
e0f56cb4 | 1125 | page_hit: |
6bacf52f | 1126 | if (unlikely(!PageUptodate(page))) { |
e05df3b1 JK |
1127 | f2fs_put_page(page, 1); |
1128 | return ERR_PTR(-EIO); | |
1129 | } | |
e05df3b1 JK |
1130 | return page; |
1131 | } | |
1132 | ||
1133 | void sync_inode_page(struct dnode_of_data *dn) | |
1134 | { | |
1135 | if (IS_INODE(dn->node_page) || dn->inode_page == dn->node_page) { | |
1136 | update_inode(dn->inode, dn->node_page); | |
1137 | } else if (dn->inode_page) { | |
1138 | if (!dn->inode_page_locked) | |
1139 | lock_page(dn->inode_page); | |
1140 | update_inode(dn->inode, dn->inode_page); | |
1141 | if (!dn->inode_page_locked) | |
1142 | unlock_page(dn->inode_page); | |
1143 | } else { | |
39936837 | 1144 | update_inode_page(dn->inode); |
e05df3b1 JK |
1145 | } |
1146 | } | |
1147 | ||
1148 | int sync_node_pages(struct f2fs_sb_info *sbi, nid_t ino, | |
1149 | struct writeback_control *wbc) | |
1150 | { | |
e05df3b1 JK |
1151 | pgoff_t index, end; |
1152 | struct pagevec pvec; | |
1153 | int step = ino ? 2 : 0; | |
1154 | int nwritten = 0, wrote = 0; | |
1155 | ||
1156 | pagevec_init(&pvec, 0); | |
1157 | ||
1158 | next_step: | |
1159 | index = 0; | |
1160 | end = LONG_MAX; | |
1161 | ||
1162 | while (index <= end) { | |
1163 | int i, nr_pages; | |
4ef51a8f | 1164 | nr_pages = pagevec_lookup_tag(&pvec, NODE_MAPPING(sbi), &index, |
e05df3b1 JK |
1165 | PAGECACHE_TAG_DIRTY, |
1166 | min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1); | |
1167 | if (nr_pages == 0) | |
1168 | break; | |
1169 | ||
1170 | for (i = 0; i < nr_pages; i++) { | |
1171 | struct page *page = pvec.pages[i]; | |
1172 | ||
1173 | /* | |
1174 | * flushing sequence with step: | |
1175 | * 0. indirect nodes | |
1176 | * 1. dentry dnodes | |
1177 | * 2. file dnodes | |
1178 | */ | |
1179 | if (step == 0 && IS_DNODE(page)) | |
1180 | continue; | |
1181 | if (step == 1 && (!IS_DNODE(page) || | |
1182 | is_cold_node(page))) | |
1183 | continue; | |
1184 | if (step == 2 && (!IS_DNODE(page) || | |
1185 | !is_cold_node(page))) | |
1186 | continue; | |
1187 | ||
1188 | /* | |
1189 | * If an fsync mode, | |
1190 | * we should not skip writing node pages. | |
1191 | */ | |
1192 | if (ino && ino_of_node(page) == ino) | |
1193 | lock_page(page); | |
1194 | else if (!trylock_page(page)) | |
1195 | continue; | |
1196 | ||
4ef51a8f | 1197 | if (unlikely(page->mapping != NODE_MAPPING(sbi))) { |
e05df3b1 JK |
1198 | continue_unlock: |
1199 | unlock_page(page); | |
1200 | continue; | |
1201 | } | |
1202 | if (ino && ino_of_node(page) != ino) | |
1203 | goto continue_unlock; | |
1204 | ||
1205 | if (!PageDirty(page)) { | |
1206 | /* someone wrote it for us */ | |
1207 | goto continue_unlock; | |
1208 | } | |
1209 | ||
1210 | if (!clear_page_dirty_for_io(page)) | |
1211 | goto continue_unlock; | |
1212 | ||
1213 | /* called by fsync() */ | |
1214 | if (ino && IS_DNODE(page)) { | |
e05df3b1 | 1215 | set_fsync_mark(page, 1); |
2dcf51ab JK |
1216 | if (IS_INODE(page)) |
1217 | set_dentry_mark(page, | |
1218 | need_dentry_mark(sbi, ino)); | |
e05df3b1 JK |
1219 | nwritten++; |
1220 | } else { | |
1221 | set_fsync_mark(page, 0); | |
1222 | set_dentry_mark(page, 0); | |
1223 | } | |
52746519 JK |
1224 | |
1225 | if (NODE_MAPPING(sbi)->a_ops->writepage(page, wbc)) | |
1226 | unlock_page(page); | |
1227 | else | |
1228 | wrote++; | |
e05df3b1 JK |
1229 | |
1230 | if (--wbc->nr_to_write == 0) | |
1231 | break; | |
1232 | } | |
1233 | pagevec_release(&pvec); | |
1234 | cond_resched(); | |
1235 | ||
1236 | if (wbc->nr_to_write == 0) { | |
1237 | step = 2; | |
1238 | break; | |
1239 | } | |
1240 | } | |
1241 | ||
1242 | if (step < 2) { | |
1243 | step++; | |
1244 | goto next_step; | |
1245 | } | |
1246 | ||
1247 | if (wrote) | |
458e6197 | 1248 | f2fs_submit_merged_bio(sbi, NODE, WRITE); |
e05df3b1 JK |
1249 | return nwritten; |
1250 | } | |
1251 | ||
cfe58f9d JK |
1252 | int wait_on_node_pages_writeback(struct f2fs_sb_info *sbi, nid_t ino) |
1253 | { | |
cfe58f9d JK |
1254 | pgoff_t index = 0, end = LONG_MAX; |
1255 | struct pagevec pvec; | |
cfe58f9d JK |
1256 | int ret2 = 0, ret = 0; |
1257 | ||
1258 | pagevec_init(&pvec, 0); | |
4ef51a8f JK |
1259 | |
1260 | while (index <= end) { | |
1261 | int i, nr_pages; | |
1262 | nr_pages = pagevec_lookup_tag(&pvec, NODE_MAPPING(sbi), &index, | |
1263 | PAGECACHE_TAG_WRITEBACK, | |
1264 | min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1); | |
1265 | if (nr_pages == 0) | |
1266 | break; | |
cfe58f9d JK |
1267 | |
1268 | for (i = 0; i < nr_pages; i++) { | |
1269 | struct page *page = pvec.pages[i]; | |
1270 | ||
1271 | /* until radix tree lookup accepts end_index */ | |
cfb271d4 | 1272 | if (unlikely(page->index > end)) |
cfe58f9d JK |
1273 | continue; |
1274 | ||
4bf08ff6 | 1275 | if (ino && ino_of_node(page) == ino) { |
3cb5ad15 | 1276 | f2fs_wait_on_page_writeback(page, NODE); |
4bf08ff6 CY |
1277 | if (TestClearPageError(page)) |
1278 | ret = -EIO; | |
1279 | } | |
cfe58f9d JK |
1280 | } |
1281 | pagevec_release(&pvec); | |
1282 | cond_resched(); | |
1283 | } | |
1284 | ||
4ef51a8f | 1285 | if (unlikely(test_and_clear_bit(AS_ENOSPC, &NODE_MAPPING(sbi)->flags))) |
cfe58f9d | 1286 | ret2 = -ENOSPC; |
4ef51a8f | 1287 | if (unlikely(test_and_clear_bit(AS_EIO, &NODE_MAPPING(sbi)->flags))) |
cfe58f9d JK |
1288 | ret2 = -EIO; |
1289 | if (!ret) | |
1290 | ret = ret2; | |
1291 | return ret; | |
1292 | } | |
1293 | ||
e05df3b1 JK |
1294 | static int f2fs_write_node_page(struct page *page, |
1295 | struct writeback_control *wbc) | |
1296 | { | |
4081363f | 1297 | struct f2fs_sb_info *sbi = F2FS_P_SB(page); |
e05df3b1 | 1298 | nid_t nid; |
e05df3b1 | 1299 | struct node_info ni; |
fb5566da | 1300 | struct f2fs_io_info fio = { |
05ca3632 | 1301 | .sbi = sbi, |
fb5566da | 1302 | .type = NODE, |
6c311ec6 | 1303 | .rw = (wbc->sync_mode == WB_SYNC_ALL) ? WRITE_SYNC : WRITE, |
05ca3632 | 1304 | .page = page, |
4375a336 | 1305 | .encrypted_page = NULL, |
fb5566da | 1306 | }; |
e05df3b1 | 1307 | |
ecda0de3 CY |
1308 | trace_f2fs_writepage(page, NODE); |
1309 | ||
caf0047e | 1310 | if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) |
87a9bd26 | 1311 | goto redirty_out; |
cf779cab JK |
1312 | if (unlikely(f2fs_cp_error(sbi))) |
1313 | goto redirty_out; | |
87a9bd26 | 1314 | |
3cb5ad15 | 1315 | f2fs_wait_on_page_writeback(page, NODE); |
e05df3b1 | 1316 | |
e05df3b1 JK |
1317 | /* get old block addr of this node page */ |
1318 | nid = nid_of_node(page); | |
9850cf4a | 1319 | f2fs_bug_on(sbi, page->index != nid); |
e05df3b1 | 1320 | |
25b93346 JK |
1321 | if (wbc->for_reclaim) { |
1322 | if (!down_read_trylock(&sbi->node_write)) | |
1323 | goto redirty_out; | |
1324 | } else { | |
1325 | down_read(&sbi->node_write); | |
1326 | } | |
1327 | ||
e05df3b1 JK |
1328 | get_node_info(sbi, nid, &ni); |
1329 | ||
1330 | /* This page is already truncated */ | |
6bacf52f | 1331 | if (unlikely(ni.blk_addr == NULL_ADDR)) { |
2bca1e23 | 1332 | ClearPageUptodate(page); |
39936837 | 1333 | dec_page_count(sbi, F2FS_DIRTY_NODES); |
25b93346 | 1334 | up_read(&sbi->node_write); |
39936837 JK |
1335 | unlock_page(page); |
1336 | return 0; | |
1337 | } | |
e05df3b1 JK |
1338 | |
1339 | set_page_writeback(page); | |
cf04e8eb | 1340 | fio.blk_addr = ni.blk_addr; |
05ca3632 | 1341 | write_node_page(nid, &fio); |
cf04e8eb | 1342 | set_node_addr(sbi, &ni, fio.blk_addr, is_fsync_dnode(page)); |
e05df3b1 | 1343 | dec_page_count(sbi, F2FS_DIRTY_NODES); |
b3582c68 | 1344 | up_read(&sbi->node_write); |
e05df3b1 | 1345 | unlock_page(page); |
27c6bd60 JK |
1346 | |
1347 | if (wbc->for_reclaim) | |
1348 | f2fs_submit_merged_bio(sbi, NODE, WRITE); | |
1349 | ||
e05df3b1 | 1350 | return 0; |
87a9bd26 JK |
1351 | |
1352 | redirty_out: | |
76f60268 | 1353 | redirty_page_for_writepage(wbc, page); |
87a9bd26 | 1354 | return AOP_WRITEPAGE_ACTIVATE; |
e05df3b1 JK |
1355 | } |
1356 | ||
1357 | static int f2fs_write_node_pages(struct address_space *mapping, | |
1358 | struct writeback_control *wbc) | |
1359 | { | |
4081363f | 1360 | struct f2fs_sb_info *sbi = F2FS_M_SB(mapping); |
50c8cdb3 | 1361 | long diff; |
e05df3b1 | 1362 | |
e5748434 CY |
1363 | trace_f2fs_writepages(mapping->host, wbc, NODE); |
1364 | ||
4660f9c0 JK |
1365 | /* balancing f2fs's metadata in background */ |
1366 | f2fs_balance_fs_bg(sbi); | |
e05df3b1 | 1367 | |
a7fdffbd | 1368 | /* collect a number of dirty node pages and write together */ |
87d6f890 | 1369 | if (get_pages(sbi, F2FS_DIRTY_NODES) < nr_pages_to_skip(sbi, NODE)) |
d3baf95d | 1370 | goto skip_write; |
a7fdffbd | 1371 | |
50c8cdb3 | 1372 | diff = nr_pages_to_write(sbi, NODE, wbc); |
fb5566da | 1373 | wbc->sync_mode = WB_SYNC_NONE; |
e05df3b1 | 1374 | sync_node_pages(sbi, 0, wbc); |
50c8cdb3 | 1375 | wbc->nr_to_write = max((long)0, wbc->nr_to_write - diff); |
e05df3b1 | 1376 | return 0; |
d3baf95d JK |
1377 | |
1378 | skip_write: | |
1379 | wbc->pages_skipped += get_pages(sbi, F2FS_DIRTY_NODES); | |
1380 | return 0; | |
e05df3b1 JK |
1381 | } |
1382 | ||
1383 | static int f2fs_set_node_page_dirty(struct page *page) | |
1384 | { | |
26c6b887 JK |
1385 | trace_f2fs_set_page_dirty(page, NODE); |
1386 | ||
e05df3b1 JK |
1387 | SetPageUptodate(page); |
1388 | if (!PageDirty(page)) { | |
1389 | __set_page_dirty_nobuffers(page); | |
4081363f | 1390 | inc_page_count(F2FS_P_SB(page), F2FS_DIRTY_NODES); |
e05df3b1 | 1391 | SetPagePrivate(page); |
9e4ded3f | 1392 | f2fs_trace_pid(page); |
e05df3b1 JK |
1393 | return 1; |
1394 | } | |
1395 | return 0; | |
1396 | } | |
1397 | ||
0a8165d7 | 1398 | /* |
e05df3b1 JK |
1399 | * Structure of the f2fs node operations |
1400 | */ | |
1401 | const struct address_space_operations f2fs_node_aops = { | |
1402 | .writepage = f2fs_write_node_page, | |
1403 | .writepages = f2fs_write_node_pages, | |
1404 | .set_page_dirty = f2fs_set_node_page_dirty, | |
487261f3 CY |
1405 | .invalidatepage = f2fs_invalidate_page, |
1406 | .releasepage = f2fs_release_page, | |
e05df3b1 JK |
1407 | }; |
1408 | ||
8a7ed66a JK |
1409 | static struct free_nid *__lookup_free_nid_list(struct f2fs_nm_info *nm_i, |
1410 | nid_t n) | |
e05df3b1 | 1411 | { |
8a7ed66a | 1412 | return radix_tree_lookup(&nm_i->free_nid_root, n); |
e05df3b1 JK |
1413 | } |
1414 | ||
8a7ed66a JK |
1415 | static void __del_from_free_nid_list(struct f2fs_nm_info *nm_i, |
1416 | struct free_nid *i) | |
e05df3b1 JK |
1417 | { |
1418 | list_del(&i->list); | |
8a7ed66a | 1419 | radix_tree_delete(&nm_i->free_nid_root, i->nid); |
e05df3b1 JK |
1420 | } |
1421 | ||
6fb03f3a | 1422 | static int add_free_nid(struct f2fs_sb_info *sbi, nid_t nid, bool build) |
e05df3b1 | 1423 | { |
6fb03f3a | 1424 | struct f2fs_nm_info *nm_i = NM_I(sbi); |
e05df3b1 | 1425 | struct free_nid *i; |
59bbd474 JK |
1426 | struct nat_entry *ne; |
1427 | bool allocated = false; | |
e05df3b1 | 1428 | |
6fb03f3a | 1429 | if (!available_free_memory(sbi, FREE_NIDS)) |
23d38844 | 1430 | return -1; |
9198aceb JK |
1431 | |
1432 | /* 0 nid should not be used */ | |
cfb271d4 | 1433 | if (unlikely(nid == 0)) |
9198aceb | 1434 | return 0; |
59bbd474 | 1435 | |
7bd59381 GZ |
1436 | if (build) { |
1437 | /* do not add allocated nids */ | |
8b26ef98 | 1438 | down_read(&nm_i->nat_tree_lock); |
7bd59381 | 1439 | ne = __lookup_nat_cache(nm_i, nid); |
8a7ed66a | 1440 | if (ne && |
7ef35e3b JK |
1441 | (!get_nat_flag(ne, IS_CHECKPOINTED) || |
1442 | nat_get_blkaddr(ne) != NULL_ADDR)) | |
7bd59381 | 1443 | allocated = true; |
8b26ef98 | 1444 | up_read(&nm_i->nat_tree_lock); |
7bd59381 GZ |
1445 | if (allocated) |
1446 | return 0; | |
e05df3b1 | 1447 | } |
7bd59381 GZ |
1448 | |
1449 | i = f2fs_kmem_cache_alloc(free_nid_slab, GFP_NOFS); | |
e05df3b1 JK |
1450 | i->nid = nid; |
1451 | i->state = NID_NEW; | |
1452 | ||
769ec6e5 JK |
1453 | if (radix_tree_preload(GFP_NOFS)) { |
1454 | kmem_cache_free(free_nid_slab, i); | |
1455 | return 0; | |
1456 | } | |
1457 | ||
e05df3b1 | 1458 | spin_lock(&nm_i->free_nid_list_lock); |
8a7ed66a | 1459 | if (radix_tree_insert(&nm_i->free_nid_root, i->nid, i)) { |
e05df3b1 | 1460 | spin_unlock(&nm_i->free_nid_list_lock); |
769ec6e5 | 1461 | radix_tree_preload_end(); |
e05df3b1 JK |
1462 | kmem_cache_free(free_nid_slab, i); |
1463 | return 0; | |
1464 | } | |
1465 | list_add_tail(&i->list, &nm_i->free_nid_list); | |
1466 | nm_i->fcnt++; | |
1467 | spin_unlock(&nm_i->free_nid_list_lock); | |
769ec6e5 | 1468 | radix_tree_preload_end(); |
e05df3b1 JK |
1469 | return 1; |
1470 | } | |
1471 | ||
1472 | static void remove_free_nid(struct f2fs_nm_info *nm_i, nid_t nid) | |
1473 | { | |
1474 | struct free_nid *i; | |
cf0ee0f0 CY |
1475 | bool need_free = false; |
1476 | ||
e05df3b1 | 1477 | spin_lock(&nm_i->free_nid_list_lock); |
8a7ed66a | 1478 | i = __lookup_free_nid_list(nm_i, nid); |
e05df3b1 | 1479 | if (i && i->state == NID_NEW) { |
8a7ed66a | 1480 | __del_from_free_nid_list(nm_i, i); |
e05df3b1 | 1481 | nm_i->fcnt--; |
cf0ee0f0 | 1482 | need_free = true; |
e05df3b1 JK |
1483 | } |
1484 | spin_unlock(&nm_i->free_nid_list_lock); | |
cf0ee0f0 CY |
1485 | |
1486 | if (need_free) | |
1487 | kmem_cache_free(free_nid_slab, i); | |
e05df3b1 JK |
1488 | } |
1489 | ||
6fb03f3a | 1490 | static void scan_nat_page(struct f2fs_sb_info *sbi, |
e05df3b1 JK |
1491 | struct page *nat_page, nid_t start_nid) |
1492 | { | |
6fb03f3a | 1493 | struct f2fs_nm_info *nm_i = NM_I(sbi); |
e05df3b1 JK |
1494 | struct f2fs_nat_block *nat_blk = page_address(nat_page); |
1495 | block_t blk_addr; | |
e05df3b1 JK |
1496 | int i; |
1497 | ||
e05df3b1 JK |
1498 | i = start_nid % NAT_ENTRY_PER_BLOCK; |
1499 | ||
1500 | for (; i < NAT_ENTRY_PER_BLOCK; i++, start_nid++) { | |
23d38844 | 1501 | |
cfb271d4 | 1502 | if (unlikely(start_nid >= nm_i->max_nid)) |
04431c44 | 1503 | break; |
23d38844 HL |
1504 | |
1505 | blk_addr = le32_to_cpu(nat_blk->entries[i].block_addr); | |
9850cf4a | 1506 | f2fs_bug_on(sbi, blk_addr == NEW_ADDR); |
23d38844 | 1507 | if (blk_addr == NULL_ADDR) { |
6fb03f3a | 1508 | if (add_free_nid(sbi, start_nid, true) < 0) |
23d38844 HL |
1509 | break; |
1510 | } | |
e05df3b1 | 1511 | } |
e05df3b1 JK |
1512 | } |
1513 | ||
1514 | static void build_free_nids(struct f2fs_sb_info *sbi) | |
1515 | { | |
e05df3b1 JK |
1516 | struct f2fs_nm_info *nm_i = NM_I(sbi); |
1517 | struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); | |
1518 | struct f2fs_summary_block *sum = curseg->sum_blk; | |
8760952d | 1519 | int i = 0; |
55008d84 | 1520 | nid_t nid = nm_i->next_scan_nid; |
e05df3b1 | 1521 | |
55008d84 JK |
1522 | /* Enough entries */ |
1523 | if (nm_i->fcnt > NAT_ENTRY_PER_BLOCK) | |
1524 | return; | |
e05df3b1 | 1525 | |
55008d84 | 1526 | /* readahead nat pages to be scanned */ |
662befda | 1527 | ra_meta_pages(sbi, NAT_BLOCK_OFFSET(nid), FREE_NID_PAGES, META_NAT); |
e05df3b1 JK |
1528 | |
1529 | while (1) { | |
1530 | struct page *page = get_current_nat_page(sbi, nid); | |
1531 | ||
6fb03f3a | 1532 | scan_nat_page(sbi, page, nid); |
e05df3b1 JK |
1533 | f2fs_put_page(page, 1); |
1534 | ||
1535 | nid += (NAT_ENTRY_PER_BLOCK - (nid % NAT_ENTRY_PER_BLOCK)); | |
cfb271d4 | 1536 | if (unlikely(nid >= nm_i->max_nid)) |
e05df3b1 | 1537 | nid = 0; |
55008d84 | 1538 | |
a6d494b6 | 1539 | if (++i >= FREE_NID_PAGES) |
e05df3b1 JK |
1540 | break; |
1541 | } | |
1542 | ||
55008d84 JK |
1543 | /* go to the next free nat pages to find free nids abundantly */ |
1544 | nm_i->next_scan_nid = nid; | |
e05df3b1 JK |
1545 | |
1546 | /* find free nids from current sum_pages */ | |
1547 | mutex_lock(&curseg->curseg_mutex); | |
1548 | for (i = 0; i < nats_in_cursum(sum); i++) { | |
1549 | block_t addr = le32_to_cpu(nat_in_journal(sum, i).block_addr); | |
1550 | nid = le32_to_cpu(nid_in_journal(sum, i)); | |
1551 | if (addr == NULL_ADDR) | |
6fb03f3a | 1552 | add_free_nid(sbi, nid, true); |
e05df3b1 JK |
1553 | else |
1554 | remove_free_nid(nm_i, nid); | |
1555 | } | |
1556 | mutex_unlock(&curseg->curseg_mutex); | |
e05df3b1 JK |
1557 | } |
1558 | ||
1559 | /* | |
1560 | * If this function returns success, caller can obtain a new nid | |
1561 | * from second parameter of this function. | |
1562 | * The returned nid could be used ino as well as nid when inode is created. | |
1563 | */ | |
1564 | bool alloc_nid(struct f2fs_sb_info *sbi, nid_t *nid) | |
1565 | { | |
1566 | struct f2fs_nm_info *nm_i = NM_I(sbi); | |
1567 | struct free_nid *i = NULL; | |
e05df3b1 | 1568 | retry: |
7ee0eeab | 1569 | if (unlikely(sbi->total_valid_node_count + 1 > nm_i->available_nids)) |
55008d84 | 1570 | return false; |
e05df3b1 | 1571 | |
e05df3b1 | 1572 | spin_lock(&nm_i->free_nid_list_lock); |
e05df3b1 | 1573 | |
55008d84 | 1574 | /* We should not use stale free nids created by build_free_nids */ |
f978f5a0 | 1575 | if (nm_i->fcnt && !on_build_free_nids(nm_i)) { |
24928634 JK |
1576 | struct node_info ni; |
1577 | ||
9850cf4a | 1578 | f2fs_bug_on(sbi, list_empty(&nm_i->free_nid_list)); |
2d7b822a | 1579 | list_for_each_entry(i, &nm_i->free_nid_list, list) |
55008d84 JK |
1580 | if (i->state == NID_NEW) |
1581 | break; | |
e05df3b1 | 1582 | |
9850cf4a | 1583 | f2fs_bug_on(sbi, i->state != NID_NEW); |
55008d84 JK |
1584 | *nid = i->nid; |
1585 | i->state = NID_ALLOC; | |
1586 | nm_i->fcnt--; | |
1587 | spin_unlock(&nm_i->free_nid_list_lock); | |
24928634 JK |
1588 | |
1589 | /* check nid is allocated already */ | |
1590 | get_node_info(sbi, *nid, &ni); | |
1591 | if (ni.blk_addr != NULL_ADDR) { | |
1592 | alloc_nid_done(sbi, *nid); | |
1593 | goto retry; | |
1594 | } | |
55008d84 JK |
1595 | return true; |
1596 | } | |
e05df3b1 | 1597 | spin_unlock(&nm_i->free_nid_list_lock); |
55008d84 JK |
1598 | |
1599 | /* Let's scan nat pages and its caches to get free nids */ | |
1600 | mutex_lock(&nm_i->build_lock); | |
55008d84 | 1601 | build_free_nids(sbi); |
55008d84 JK |
1602 | mutex_unlock(&nm_i->build_lock); |
1603 | goto retry; | |
e05df3b1 JK |
1604 | } |
1605 | ||
0a8165d7 | 1606 | /* |
e05df3b1 JK |
1607 | * alloc_nid() should be called prior to this function. |
1608 | */ | |
1609 | void alloc_nid_done(struct f2fs_sb_info *sbi, nid_t nid) | |
1610 | { | |
1611 | struct f2fs_nm_info *nm_i = NM_I(sbi); | |
1612 | struct free_nid *i; | |
1613 | ||
1614 | spin_lock(&nm_i->free_nid_list_lock); | |
8a7ed66a | 1615 | i = __lookup_free_nid_list(nm_i, nid); |
9850cf4a | 1616 | f2fs_bug_on(sbi, !i || i->state != NID_ALLOC); |
8a7ed66a | 1617 | __del_from_free_nid_list(nm_i, i); |
e05df3b1 | 1618 | spin_unlock(&nm_i->free_nid_list_lock); |
cf0ee0f0 CY |
1619 | |
1620 | kmem_cache_free(free_nid_slab, i); | |
e05df3b1 JK |
1621 | } |
1622 | ||
0a8165d7 | 1623 | /* |
e05df3b1 JK |
1624 | * alloc_nid() should be called prior to this function. |
1625 | */ | |
1626 | void alloc_nid_failed(struct f2fs_sb_info *sbi, nid_t nid) | |
1627 | { | |
49952fa1 JK |
1628 | struct f2fs_nm_info *nm_i = NM_I(sbi); |
1629 | struct free_nid *i; | |
cf0ee0f0 | 1630 | bool need_free = false; |
49952fa1 | 1631 | |
65985d93 JK |
1632 | if (!nid) |
1633 | return; | |
1634 | ||
49952fa1 | 1635 | spin_lock(&nm_i->free_nid_list_lock); |
8a7ed66a | 1636 | i = __lookup_free_nid_list(nm_i, nid); |
9850cf4a | 1637 | f2fs_bug_on(sbi, !i || i->state != NID_ALLOC); |
6fb03f3a | 1638 | if (!available_free_memory(sbi, FREE_NIDS)) { |
8a7ed66a | 1639 | __del_from_free_nid_list(nm_i, i); |
cf0ee0f0 | 1640 | need_free = true; |
95630cba HL |
1641 | } else { |
1642 | i->state = NID_NEW; | |
1643 | nm_i->fcnt++; | |
1644 | } | |
49952fa1 | 1645 | spin_unlock(&nm_i->free_nid_list_lock); |
cf0ee0f0 CY |
1646 | |
1647 | if (need_free) | |
1648 | kmem_cache_free(free_nid_slab, i); | |
e05df3b1 JK |
1649 | } |
1650 | ||
31696580 CY |
1651 | int try_to_free_nids(struct f2fs_sb_info *sbi, int nr_shrink) |
1652 | { | |
1653 | struct f2fs_nm_info *nm_i = NM_I(sbi); | |
1654 | struct free_nid *i, *next; | |
1655 | int nr = nr_shrink; | |
1656 | ||
1657 | if (!mutex_trylock(&nm_i->build_lock)) | |
1658 | return 0; | |
1659 | ||
1660 | spin_lock(&nm_i->free_nid_list_lock); | |
1661 | list_for_each_entry_safe(i, next, &nm_i->free_nid_list, list) { | |
1662 | if (nr_shrink <= 0 || nm_i->fcnt <= NAT_ENTRY_PER_BLOCK) | |
1663 | break; | |
1664 | if (i->state == NID_ALLOC) | |
1665 | continue; | |
1666 | __del_from_free_nid_list(nm_i, i); | |
31696580 | 1667 | kmem_cache_free(free_nid_slab, i); |
f7409d0f | 1668 | nm_i->fcnt--; |
31696580 | 1669 | nr_shrink--; |
31696580 CY |
1670 | } |
1671 | spin_unlock(&nm_i->free_nid_list_lock); | |
1672 | mutex_unlock(&nm_i->build_lock); | |
1673 | ||
1674 | return nr - nr_shrink; | |
1675 | } | |
1676 | ||
70cfed88 | 1677 | void recover_inline_xattr(struct inode *inode, struct page *page) |
28cdce04 | 1678 | { |
28cdce04 CY |
1679 | void *src_addr, *dst_addr; |
1680 | size_t inline_size; | |
1681 | struct page *ipage; | |
1682 | struct f2fs_inode *ri; | |
1683 | ||
4081363f | 1684 | ipage = get_node_page(F2FS_I_SB(inode), inode->i_ino); |
9850cf4a | 1685 | f2fs_bug_on(F2FS_I_SB(inode), IS_ERR(ipage)); |
28cdce04 | 1686 | |
e3b4d43f JK |
1687 | ri = F2FS_INODE(page); |
1688 | if (!(ri->i_inline & F2FS_INLINE_XATTR)) { | |
1689 | clear_inode_flag(F2FS_I(inode), FI_INLINE_XATTR); | |
1690 | goto update_inode; | |
1691 | } | |
1692 | ||
28cdce04 CY |
1693 | dst_addr = inline_xattr_addr(ipage); |
1694 | src_addr = inline_xattr_addr(page); | |
1695 | inline_size = inline_xattr_size(inode); | |
1696 | ||
54b591df | 1697 | f2fs_wait_on_page_writeback(ipage, NODE); |
28cdce04 | 1698 | memcpy(dst_addr, src_addr, inline_size); |
e3b4d43f | 1699 | update_inode: |
28cdce04 CY |
1700 | update_inode(inode, ipage); |
1701 | f2fs_put_page(ipage, 1); | |
1702 | } | |
1703 | ||
1c35a90e | 1704 | void recover_xattr_data(struct inode *inode, struct page *page, block_t blkaddr) |
abb2366c | 1705 | { |
4081363f | 1706 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
abb2366c JK |
1707 | nid_t prev_xnid = F2FS_I(inode)->i_xattr_nid; |
1708 | nid_t new_xnid = nid_of_node(page); | |
1709 | struct node_info ni; | |
1710 | ||
abb2366c JK |
1711 | /* 1: invalidate the previous xattr nid */ |
1712 | if (!prev_xnid) | |
1713 | goto recover_xnid; | |
1714 | ||
1715 | /* Deallocate node address */ | |
1716 | get_node_info(sbi, prev_xnid, &ni); | |
9850cf4a | 1717 | f2fs_bug_on(sbi, ni.blk_addr == NULL_ADDR); |
abb2366c JK |
1718 | invalidate_blocks(sbi, ni.blk_addr); |
1719 | dec_valid_node_count(sbi, inode); | |
479f40c4 | 1720 | set_node_addr(sbi, &ni, NULL_ADDR, false); |
abb2366c JK |
1721 | |
1722 | recover_xnid: | |
1723 | /* 2: allocate new xattr nid */ | |
1724 | if (unlikely(!inc_valid_node_count(sbi, inode))) | |
9850cf4a | 1725 | f2fs_bug_on(sbi, 1); |
abb2366c JK |
1726 | |
1727 | remove_free_nid(NM_I(sbi), new_xnid); | |
1728 | get_node_info(sbi, new_xnid, &ni); | |
1729 | ni.ino = inode->i_ino; | |
479f40c4 | 1730 | set_node_addr(sbi, &ni, NEW_ADDR, false); |
abb2366c JK |
1731 | F2FS_I(inode)->i_xattr_nid = new_xnid; |
1732 | ||
1733 | /* 3: update xattr blkaddr */ | |
1734 | refresh_sit_entry(sbi, NEW_ADDR, blkaddr); | |
479f40c4 | 1735 | set_node_addr(sbi, &ni, blkaddr, false); |
abb2366c JK |
1736 | |
1737 | update_inode_page(inode); | |
abb2366c JK |
1738 | } |
1739 | ||
e05df3b1 JK |
1740 | int recover_inode_page(struct f2fs_sb_info *sbi, struct page *page) |
1741 | { | |
58bfaf44 | 1742 | struct f2fs_inode *src, *dst; |
e05df3b1 JK |
1743 | nid_t ino = ino_of_node(page); |
1744 | struct node_info old_ni, new_ni; | |
1745 | struct page *ipage; | |
1746 | ||
e8271fa3 JK |
1747 | get_node_info(sbi, ino, &old_ni); |
1748 | ||
1749 | if (unlikely(old_ni.blk_addr != NULL_ADDR)) | |
1750 | return -EINVAL; | |
1751 | ||
4ef51a8f | 1752 | ipage = grab_cache_page(NODE_MAPPING(sbi), ino); |
e05df3b1 JK |
1753 | if (!ipage) |
1754 | return -ENOMEM; | |
1755 | ||
e1c42045 | 1756 | /* Should not use this inode from free nid list */ |
e05df3b1 JK |
1757 | remove_free_nid(NM_I(sbi), ino); |
1758 | ||
e05df3b1 JK |
1759 | SetPageUptodate(ipage); |
1760 | fill_node_footer(ipage, ino, ino, 0, true); | |
1761 | ||
58bfaf44 JK |
1762 | src = F2FS_INODE(page); |
1763 | dst = F2FS_INODE(ipage); | |
e05df3b1 | 1764 | |
58bfaf44 JK |
1765 | memcpy(dst, src, (unsigned long)&src->i_ext - (unsigned long)src); |
1766 | dst->i_size = 0; | |
1767 | dst->i_blocks = cpu_to_le64(1); | |
1768 | dst->i_links = cpu_to_le32(1); | |
1769 | dst->i_xattr_nid = 0; | |
617deb8c | 1770 | dst->i_inline = src->i_inline & F2FS_INLINE_XATTR; |
e05df3b1 JK |
1771 | |
1772 | new_ni = old_ni; | |
1773 | new_ni.ino = ino; | |
1774 | ||
cfb271d4 | 1775 | if (unlikely(!inc_valid_node_count(sbi, NULL))) |
65e5cd0a | 1776 | WARN_ON(1); |
479f40c4 | 1777 | set_node_addr(sbi, &new_ni, NEW_ADDR, false); |
e05df3b1 | 1778 | inc_valid_inode_count(sbi); |
617deb8c | 1779 | set_page_dirty(ipage); |
e05df3b1 JK |
1780 | f2fs_put_page(ipage, 1); |
1781 | return 0; | |
1782 | } | |
1783 | ||
1784 | int restore_node_summary(struct f2fs_sb_info *sbi, | |
1785 | unsigned int segno, struct f2fs_summary_block *sum) | |
1786 | { | |
1787 | struct f2fs_node *rn; | |
1788 | struct f2fs_summary *sum_entry; | |
e05df3b1 | 1789 | block_t addr; |
90a893c7 | 1790 | int bio_blocks = MAX_BIO_BLOCKS(sbi); |
9ecf4b80 | 1791 | int i, idx, last_offset, nrpages; |
e05df3b1 JK |
1792 | |
1793 | /* scan the node segment */ | |
1794 | last_offset = sbi->blocks_per_seg; | |
1795 | addr = START_BLOCK(sbi, segno); | |
1796 | sum_entry = &sum->entries[0]; | |
1797 | ||
9ecf4b80 | 1798 | for (i = 0; i < last_offset; i += nrpages, addr += nrpages) { |
9af0ff1c | 1799 | nrpages = min(last_offset - i, bio_blocks); |
393ff91f | 1800 | |
e1c42045 | 1801 | /* readahead node pages */ |
9ecf4b80 | 1802 | ra_meta_pages(sbi, addr, nrpages, META_POR); |
e05df3b1 | 1803 | |
9ecf4b80 CY |
1804 | for (idx = addr; idx < addr + nrpages; idx++) { |
1805 | struct page *page = get_meta_page(sbi, idx); | |
9af0ff1c | 1806 | |
9ecf4b80 CY |
1807 | rn = F2FS_NODE(page); |
1808 | sum_entry->nid = rn->footer.nid; | |
1809 | sum_entry->version = 0; | |
1810 | sum_entry->ofs_in_node = 0; | |
1811 | sum_entry++; | |
1812 | f2fs_put_page(page, 1); | |
9af0ff1c | 1813 | } |
bac4eef6 | 1814 | |
9ecf4b80 | 1815 | invalidate_mapping_pages(META_MAPPING(sbi), addr, |
bac4eef6 | 1816 | addr + nrpages); |
e05df3b1 | 1817 | } |
9ecf4b80 | 1818 | return 0; |
e05df3b1 JK |
1819 | } |
1820 | ||
aec71382 | 1821 | static void remove_nats_in_journal(struct f2fs_sb_info *sbi) |
e05df3b1 JK |
1822 | { |
1823 | struct f2fs_nm_info *nm_i = NM_I(sbi); | |
1824 | struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); | |
1825 | struct f2fs_summary_block *sum = curseg->sum_blk; | |
1826 | int i; | |
1827 | ||
1828 | mutex_lock(&curseg->curseg_mutex); | |
e05df3b1 JK |
1829 | for (i = 0; i < nats_in_cursum(sum); i++) { |
1830 | struct nat_entry *ne; | |
1831 | struct f2fs_nat_entry raw_ne; | |
1832 | nid_t nid = le32_to_cpu(nid_in_journal(sum, i)); | |
1833 | ||
1834 | raw_ne = nat_in_journal(sum, i); | |
9be32d72 | 1835 | |
8b26ef98 | 1836 | down_write(&nm_i->nat_tree_lock); |
e05df3b1 | 1837 | ne = __lookup_nat_cache(nm_i, nid); |
e05df3b1 | 1838 | if (!ne) { |
9be32d72 JK |
1839 | ne = grab_nat_entry(nm_i, nid); |
1840 | node_info_from_raw_nat(&ne->ni, &raw_ne); | |
e05df3b1 | 1841 | } |
e05df3b1 | 1842 | __set_nat_cache_dirty(nm_i, ne); |
8b26ef98 | 1843 | up_write(&nm_i->nat_tree_lock); |
e05df3b1 JK |
1844 | } |
1845 | update_nats_in_cursum(sum, -i); | |
1846 | mutex_unlock(&curseg->curseg_mutex); | |
e05df3b1 JK |
1847 | } |
1848 | ||
309cc2b6 JK |
1849 | static void __adjust_nat_entry_set(struct nat_entry_set *nes, |
1850 | struct list_head *head, int max) | |
e05df3b1 | 1851 | { |
309cc2b6 | 1852 | struct nat_entry_set *cur; |
e05df3b1 | 1853 | |
309cc2b6 JK |
1854 | if (nes->entry_cnt >= max) |
1855 | goto add_out; | |
e05df3b1 | 1856 | |
309cc2b6 JK |
1857 | list_for_each_entry(cur, head, set_list) { |
1858 | if (cur->entry_cnt >= nes->entry_cnt) { | |
1859 | list_add(&nes->set_list, cur->set_list.prev); | |
1860 | return; | |
1861 | } | |
aec71382 | 1862 | } |
309cc2b6 JK |
1863 | add_out: |
1864 | list_add_tail(&nes->set_list, head); | |
1865 | } | |
e05df3b1 | 1866 | |
309cc2b6 JK |
1867 | static void __flush_nat_entry_set(struct f2fs_sb_info *sbi, |
1868 | struct nat_entry_set *set) | |
1869 | { | |
1870 | struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); | |
1871 | struct f2fs_summary_block *sum = curseg->sum_blk; | |
1872 | nid_t start_nid = set->set * NAT_ENTRY_PER_BLOCK; | |
1873 | bool to_journal = true; | |
1874 | struct f2fs_nat_block *nat_blk; | |
1875 | struct nat_entry *ne, *cur; | |
1876 | struct page *page = NULL; | |
57ed1e95 | 1877 | struct f2fs_nm_info *nm_i = NM_I(sbi); |
e05df3b1 | 1878 | |
aec71382 CY |
1879 | /* |
1880 | * there are two steps to flush nat entries: | |
1881 | * #1, flush nat entries to journal in current hot data summary block. | |
1882 | * #2, flush nat entries to nat page. | |
1883 | */ | |
309cc2b6 JK |
1884 | if (!__has_cursum_space(sum, set->entry_cnt, NAT_JOURNAL)) |
1885 | to_journal = false; | |
1886 | ||
1887 | if (to_journal) { | |
1888 | mutex_lock(&curseg->curseg_mutex); | |
1889 | } else { | |
1890 | page = get_next_nat_page(sbi, start_nid); | |
1891 | nat_blk = page_address(page); | |
1892 | f2fs_bug_on(sbi, !nat_blk); | |
1893 | } | |
aec71382 | 1894 | |
309cc2b6 JK |
1895 | /* flush dirty nats in nat entry set */ |
1896 | list_for_each_entry_safe(ne, cur, &set->entry_list, list) { | |
1897 | struct f2fs_nat_entry *raw_ne; | |
1898 | nid_t nid = nat_get_nid(ne); | |
1899 | int offset; | |
1900 | ||
1901 | if (nat_get_blkaddr(ne) == NEW_ADDR) | |
1902 | continue; | |
aec71382 CY |
1903 | |
1904 | if (to_journal) { | |
309cc2b6 JK |
1905 | offset = lookup_journal_in_cursum(sum, |
1906 | NAT_JOURNAL, nid, 1); | |
1907 | f2fs_bug_on(sbi, offset < 0); | |
1908 | raw_ne = &nat_in_journal(sum, offset); | |
1909 | nid_in_journal(sum, offset) = cpu_to_le32(nid); | |
aec71382 | 1910 | } else { |
309cc2b6 | 1911 | raw_ne = &nat_blk->entries[nid - start_nid]; |
e05df3b1 | 1912 | } |
309cc2b6 | 1913 | raw_nat_from_node_info(raw_ne, &ne->ni); |
e05df3b1 | 1914 | |
8b26ef98 | 1915 | down_write(&NM_I(sbi)->nat_tree_lock); |
309cc2b6 JK |
1916 | nat_reset_flag(ne); |
1917 | __clear_nat_cache_dirty(NM_I(sbi), ne); | |
8b26ef98 | 1918 | up_write(&NM_I(sbi)->nat_tree_lock); |
aec71382 | 1919 | |
309cc2b6 JK |
1920 | if (nat_get_blkaddr(ne) == NULL_ADDR) |
1921 | add_free_nid(sbi, nid, false); | |
1922 | } | |
e05df3b1 | 1923 | |
309cc2b6 JK |
1924 | if (to_journal) |
1925 | mutex_unlock(&curseg->curseg_mutex); | |
1926 | else | |
1927 | f2fs_put_page(page, 1); | |
aec71382 | 1928 | |
80ec2e91 CL |
1929 | f2fs_bug_on(sbi, set->entry_cnt); |
1930 | ||
57ed1e95 | 1931 | down_write(&nm_i->nat_tree_lock); |
80ec2e91 | 1932 | radix_tree_delete(&NM_I(sbi)->nat_set_root, set->set); |
57ed1e95 | 1933 | up_write(&nm_i->nat_tree_lock); |
80ec2e91 | 1934 | kmem_cache_free(nat_entry_set_slab, set); |
309cc2b6 | 1935 | } |
aec71382 | 1936 | |
309cc2b6 JK |
1937 | /* |
1938 | * This function is called during the checkpointing process. | |
1939 | */ | |
1940 | void flush_nat_entries(struct f2fs_sb_info *sbi) | |
1941 | { | |
1942 | struct f2fs_nm_info *nm_i = NM_I(sbi); | |
1943 | struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); | |
1944 | struct f2fs_summary_block *sum = curseg->sum_blk; | |
7aed0d45 | 1945 | struct nat_entry_set *setvec[SETVEC_SIZE]; |
309cc2b6 JK |
1946 | struct nat_entry_set *set, *tmp; |
1947 | unsigned int found; | |
1948 | nid_t set_idx = 0; | |
1949 | LIST_HEAD(sets); | |
1950 | ||
20d047c8 CL |
1951 | if (!nm_i->dirty_nat_cnt) |
1952 | return; | |
309cc2b6 JK |
1953 | /* |
1954 | * if there are no enough space in journal to store dirty nat | |
1955 | * entries, remove all entries from journal and merge them | |
1956 | * into nat entry set. | |
1957 | */ | |
1958 | if (!__has_cursum_space(sum, nm_i->dirty_nat_cnt, NAT_JOURNAL)) | |
1959 | remove_nats_in_journal(sbi); | |
1960 | ||
57ed1e95 | 1961 | down_write(&nm_i->nat_tree_lock); |
309cc2b6 | 1962 | while ((found = __gang_lookup_nat_set(nm_i, |
7aed0d45 | 1963 | set_idx, SETVEC_SIZE, setvec))) { |
309cc2b6 JK |
1964 | unsigned idx; |
1965 | set_idx = setvec[found - 1]->set + 1; | |
1966 | for (idx = 0; idx < found; idx++) | |
1967 | __adjust_nat_entry_set(setvec[idx], &sets, | |
1968 | MAX_NAT_JENTRIES(sum)); | |
e05df3b1 | 1969 | } |
57ed1e95 | 1970 | up_write(&nm_i->nat_tree_lock); |
aec71382 | 1971 | |
309cc2b6 JK |
1972 | /* flush dirty nats in nat entry set */ |
1973 | list_for_each_entry_safe(set, tmp, &sets, set_list) | |
1974 | __flush_nat_entry_set(sbi, set); | |
1975 | ||
9850cf4a | 1976 | f2fs_bug_on(sbi, nm_i->dirty_nat_cnt); |
e05df3b1 JK |
1977 | } |
1978 | ||
1979 | static int init_node_manager(struct f2fs_sb_info *sbi) | |
1980 | { | |
1981 | struct f2fs_super_block *sb_raw = F2FS_RAW_SUPER(sbi); | |
1982 | struct f2fs_nm_info *nm_i = NM_I(sbi); | |
1983 | unsigned char *version_bitmap; | |
1984 | unsigned int nat_segs, nat_blocks; | |
1985 | ||
1986 | nm_i->nat_blkaddr = le32_to_cpu(sb_raw->nat_blkaddr); | |
1987 | ||
1988 | /* segment_count_nat includes pair segment so divide to 2. */ | |
1989 | nat_segs = le32_to_cpu(sb_raw->segment_count_nat) >> 1; | |
1990 | nat_blocks = nat_segs << le32_to_cpu(sb_raw->log_blocks_per_seg); | |
b63da15e | 1991 | |
7ee0eeab JK |
1992 | nm_i->max_nid = NAT_ENTRY_PER_BLOCK * nat_blocks; |
1993 | ||
b63da15e | 1994 | /* not used nids: 0, node, meta, (and root counted as valid node) */ |
c200b1aa | 1995 | nm_i->available_nids = nm_i->max_nid - F2FS_RESERVED_NODE_NUM; |
e05df3b1 JK |
1996 | nm_i->fcnt = 0; |
1997 | nm_i->nat_cnt = 0; | |
cdfc41c1 | 1998 | nm_i->ram_thresh = DEF_RAM_THRESHOLD; |
e05df3b1 | 1999 | |
8a7ed66a | 2000 | INIT_RADIX_TREE(&nm_i->free_nid_root, GFP_ATOMIC); |
e05df3b1 | 2001 | INIT_LIST_HEAD(&nm_i->free_nid_list); |
769ec6e5 JK |
2002 | INIT_RADIX_TREE(&nm_i->nat_root, GFP_NOIO); |
2003 | INIT_RADIX_TREE(&nm_i->nat_set_root, GFP_NOIO); | |
e05df3b1 | 2004 | INIT_LIST_HEAD(&nm_i->nat_entries); |
e05df3b1 JK |
2005 | |
2006 | mutex_init(&nm_i->build_lock); | |
2007 | spin_lock_init(&nm_i->free_nid_list_lock); | |
8b26ef98 | 2008 | init_rwsem(&nm_i->nat_tree_lock); |
e05df3b1 | 2009 | |
e05df3b1 | 2010 | nm_i->next_scan_nid = le32_to_cpu(sbi->ckpt->next_free_nid); |
79b5793b | 2011 | nm_i->bitmap_size = __bitmap_size(sbi, NAT_BITMAP); |
e05df3b1 JK |
2012 | version_bitmap = __bitmap_ptr(sbi, NAT_BITMAP); |
2013 | if (!version_bitmap) | |
2014 | return -EFAULT; | |
2015 | ||
79b5793b AG |
2016 | nm_i->nat_bitmap = kmemdup(version_bitmap, nm_i->bitmap_size, |
2017 | GFP_KERNEL); | |
2018 | if (!nm_i->nat_bitmap) | |
2019 | return -ENOMEM; | |
e05df3b1 JK |
2020 | return 0; |
2021 | } | |
2022 | ||
2023 | int build_node_manager(struct f2fs_sb_info *sbi) | |
2024 | { | |
2025 | int err; | |
2026 | ||
2027 | sbi->nm_info = kzalloc(sizeof(struct f2fs_nm_info), GFP_KERNEL); | |
2028 | if (!sbi->nm_info) | |
2029 | return -ENOMEM; | |
2030 | ||
2031 | err = init_node_manager(sbi); | |
2032 | if (err) | |
2033 | return err; | |
2034 | ||
2035 | build_free_nids(sbi); | |
2036 | return 0; | |
2037 | } | |
2038 | ||
2039 | void destroy_node_manager(struct f2fs_sb_info *sbi) | |
2040 | { | |
2041 | struct f2fs_nm_info *nm_i = NM_I(sbi); | |
2042 | struct free_nid *i, *next_i; | |
2043 | struct nat_entry *natvec[NATVEC_SIZE]; | |
7aed0d45 | 2044 | struct nat_entry_set *setvec[SETVEC_SIZE]; |
e05df3b1 JK |
2045 | nid_t nid = 0; |
2046 | unsigned int found; | |
2047 | ||
2048 | if (!nm_i) | |
2049 | return; | |
2050 | ||
2051 | /* destroy free nid list */ | |
2052 | spin_lock(&nm_i->free_nid_list_lock); | |
2053 | list_for_each_entry_safe(i, next_i, &nm_i->free_nid_list, list) { | |
9850cf4a | 2054 | f2fs_bug_on(sbi, i->state == NID_ALLOC); |
8a7ed66a | 2055 | __del_from_free_nid_list(nm_i, i); |
e05df3b1 | 2056 | nm_i->fcnt--; |
cf0ee0f0 CY |
2057 | spin_unlock(&nm_i->free_nid_list_lock); |
2058 | kmem_cache_free(free_nid_slab, i); | |
2059 | spin_lock(&nm_i->free_nid_list_lock); | |
e05df3b1 | 2060 | } |
9850cf4a | 2061 | f2fs_bug_on(sbi, nm_i->fcnt); |
e05df3b1 JK |
2062 | spin_unlock(&nm_i->free_nid_list_lock); |
2063 | ||
2064 | /* destroy nat cache */ | |
8b26ef98 | 2065 | down_write(&nm_i->nat_tree_lock); |
e05df3b1 JK |
2066 | while ((found = __gang_lookup_nat_cache(nm_i, |
2067 | nid, NATVEC_SIZE, natvec))) { | |
2068 | unsigned idx; | |
7aed0d45 | 2069 | |
b6ce391e GZ |
2070 | nid = nat_get_nid(natvec[found - 1]) + 1; |
2071 | for (idx = 0; idx < found; idx++) | |
2072 | __del_from_nat_cache(nm_i, natvec[idx]); | |
e05df3b1 | 2073 | } |
9850cf4a | 2074 | f2fs_bug_on(sbi, nm_i->nat_cnt); |
7aed0d45 JK |
2075 | |
2076 | /* destroy nat set cache */ | |
2077 | nid = 0; | |
2078 | while ((found = __gang_lookup_nat_set(nm_i, | |
2079 | nid, SETVEC_SIZE, setvec))) { | |
2080 | unsigned idx; | |
2081 | ||
2082 | nid = setvec[found - 1]->set + 1; | |
2083 | for (idx = 0; idx < found; idx++) { | |
2084 | /* entry_cnt is not zero, when cp_error was occurred */ | |
2085 | f2fs_bug_on(sbi, !list_empty(&setvec[idx]->entry_list)); | |
2086 | radix_tree_delete(&nm_i->nat_set_root, setvec[idx]->set); | |
2087 | kmem_cache_free(nat_entry_set_slab, setvec[idx]); | |
2088 | } | |
2089 | } | |
8b26ef98 | 2090 | up_write(&nm_i->nat_tree_lock); |
e05df3b1 JK |
2091 | |
2092 | kfree(nm_i->nat_bitmap); | |
2093 | sbi->nm_info = NULL; | |
2094 | kfree(nm_i); | |
2095 | } | |
2096 | ||
6e6093a8 | 2097 | int __init create_node_manager_caches(void) |
e05df3b1 JK |
2098 | { |
2099 | nat_entry_slab = f2fs_kmem_cache_create("nat_entry", | |
e8512d2e | 2100 | sizeof(struct nat_entry)); |
e05df3b1 | 2101 | if (!nat_entry_slab) |
aec71382 | 2102 | goto fail; |
e05df3b1 JK |
2103 | |
2104 | free_nid_slab = f2fs_kmem_cache_create("free_nid", | |
e8512d2e | 2105 | sizeof(struct free_nid)); |
aec71382 | 2106 | if (!free_nid_slab) |
ce3e6d25 | 2107 | goto destroy_nat_entry; |
aec71382 CY |
2108 | |
2109 | nat_entry_set_slab = f2fs_kmem_cache_create("nat_entry_set", | |
2110 | sizeof(struct nat_entry_set)); | |
2111 | if (!nat_entry_set_slab) | |
ce3e6d25 | 2112 | goto destroy_free_nid; |
e05df3b1 | 2113 | return 0; |
aec71382 | 2114 | |
ce3e6d25 | 2115 | destroy_free_nid: |
aec71382 | 2116 | kmem_cache_destroy(free_nid_slab); |
ce3e6d25 | 2117 | destroy_nat_entry: |
aec71382 CY |
2118 | kmem_cache_destroy(nat_entry_slab); |
2119 | fail: | |
2120 | return -ENOMEM; | |
e05df3b1 JK |
2121 | } |
2122 | ||
2123 | void destroy_node_manager_caches(void) | |
2124 | { | |
aec71382 | 2125 | kmem_cache_destroy(nat_entry_set_slab); |
e05df3b1 JK |
2126 | kmem_cache_destroy(free_nid_slab); |
2127 | kmem_cache_destroy(nat_entry_slab); | |
2128 | } |