Commit | Line | Data |
---|---|---|
0a8165d7 | 1 | /* |
d624c96f JK |
2 | * fs/f2fs/recovery.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 "f2fs.h" | |
14 | #include "node.h" | |
15 | #include "segment.h" | |
16 | ||
441ac5cb JK |
17 | /* |
18 | * Roll forward recovery scenarios. | |
19 | * | |
20 | * [Term] F: fsync_mark, D: dentry_mark | |
21 | * | |
22 | * 1. inode(x) | CP | inode(x) | dnode(F) | |
23 | * -> Update the latest inode(x). | |
24 | * | |
25 | * 2. inode(x) | CP | inode(F) | dnode(F) | |
26 | * -> No problem. | |
27 | * | |
28 | * 3. inode(x) | CP | dnode(F) | inode(x) | |
29 | * -> Recover to the latest dnode(F), and drop the last inode(x) | |
30 | * | |
31 | * 4. inode(x) | CP | dnode(F) | inode(F) | |
32 | * -> No problem. | |
33 | * | |
34 | * 5. CP | inode(x) | dnode(F) | |
35 | * -> The inode(DF) was missing. Should drop this dnode(F). | |
36 | * | |
37 | * 6. CP | inode(DF) | dnode(F) | |
38 | * -> No problem. | |
39 | * | |
40 | * 7. CP | dnode(F) | inode(DF) | |
41 | * -> If f2fs_iget fails, then goto next to find inode(DF). | |
42 | * | |
43 | * 8. CP | dnode(F) | inode(x) | |
44 | * -> If f2fs_iget fails, then goto next to find inode(DF). | |
45 | * But it will fail due to no inode(DF). | |
46 | */ | |
47 | ||
d624c96f JK |
48 | static struct kmem_cache *fsync_entry_slab; |
49 | ||
50 | bool space_for_roll_forward(struct f2fs_sb_info *sbi) | |
51 | { | |
41382ec4 JK |
52 | s64 nalloc = percpu_counter_sum_positive(&sbi->alloc_valid_block_count); |
53 | ||
54 | if (sbi->last_valid_block_count + nalloc > sbi->user_block_count) | |
d624c96f JK |
55 | return false; |
56 | return true; | |
57 | } | |
58 | ||
59 | static struct fsync_inode_entry *get_fsync_inode(struct list_head *head, | |
60 | nid_t ino) | |
61 | { | |
d624c96f JK |
62 | struct fsync_inode_entry *entry; |
63 | ||
2d7b822a | 64 | list_for_each_entry(entry, head, list) |
d624c96f JK |
65 | if (entry->inode->i_ino == ino) |
66 | return entry; | |
2d7b822a | 67 | |
d624c96f JK |
68 | return NULL; |
69 | } | |
70 | ||
f4702d61 | 71 | static struct fsync_inode_entry *add_fsync_inode(struct f2fs_sb_info *sbi, |
4b2414d0 | 72 | struct list_head *head, nid_t ino, bool quota_inode) |
3f8ab270 | 73 | { |
e8ea9b3d | 74 | struct inode *inode; |
3f8ab270 | 75 | struct fsync_inode_entry *entry; |
4b2414d0 | 76 | int err; |
3f8ab270 | 77 | |
e8ea9b3d | 78 | inode = f2fs_iget_retry(sbi->sb, ino); |
f4702d61 JK |
79 | if (IS_ERR(inode)) |
80 | return ERR_CAST(inode); | |
81 | ||
4b2414d0 CY |
82 | err = dquot_initialize(inode); |
83 | if (err) | |
84 | goto err_out; | |
85 | ||
86 | if (quota_inode) { | |
87 | err = dquot_alloc_inode(inode); | |
88 | if (err) | |
89 | goto err_out; | |
90 | } | |
91 | ||
e8ea9b3d | 92 | entry = f2fs_kmem_cache_alloc(fsync_entry_slab, GFP_F2FS_ZERO); |
3f8ab270 CY |
93 | entry->inode = inode; |
94 | list_add_tail(&entry->list, head); | |
95 | ||
96 | return entry; | |
4b2414d0 CY |
97 | err_out: |
98 | iput(inode); | |
99 | return ERR_PTR(err); | |
3f8ab270 CY |
100 | } |
101 | ||
102 | static void del_fsync_inode(struct fsync_inode_entry *entry) | |
103 | { | |
104 | iput(entry->inode); | |
105 | list_del(&entry->list); | |
106 | kmem_cache_free(fsync_entry_slab, entry); | |
107 | } | |
108 | ||
f61cce5b CY |
109 | static int recover_dentry(struct inode *inode, struct page *ipage, |
110 | struct list_head *dir_list) | |
d624c96f | 111 | { |
58bfaf44 | 112 | struct f2fs_inode *raw_inode = F2FS_INODE(ipage); |
74d0b917 | 113 | nid_t pino = le32_to_cpu(raw_inode->i_pino); |
6b8213d9 | 114 | struct f2fs_dir_entry *de; |
e7ba108a | 115 | struct fscrypt_name fname; |
d624c96f | 116 | struct page *page; |
6b8213d9 | 117 | struct inode *dir, *einode; |
f61cce5b | 118 | struct fsync_inode_entry *entry; |
d624c96f | 119 | int err = 0; |
e7ba108a | 120 | char *name; |
d624c96f | 121 | |
f61cce5b CY |
122 | entry = get_fsync_inode(dir_list, pino); |
123 | if (!entry) { | |
4b2414d0 CY |
124 | entry = add_fsync_inode(F2FS_I_SB(inode), dir_list, |
125 | pino, false); | |
f4702d61 JK |
126 | if (IS_ERR(entry)) { |
127 | dir = ERR_CAST(entry); | |
128 | err = PTR_ERR(entry); | |
f61cce5b CY |
129 | goto out; |
130 | } | |
ed57c27f JK |
131 | } |
132 | ||
f61cce5b CY |
133 | dir = entry->inode; |
134 | ||
e7ba108a SL |
135 | memset(&fname, 0, sizeof(struct fscrypt_name)); |
136 | fname.disk_name.len = le32_to_cpu(raw_inode->i_namelen); | |
137 | fname.disk_name.name = raw_inode->i_name; | |
d96b1431 | 138 | |
e7ba108a | 139 | if (unlikely(fname.disk_name.len > F2FS_NAME_LEN)) { |
d96b1431 CY |
140 | WARN_ON(1); |
141 | err = -ENAMETOOLONG; | |
f61cce5b | 142 | goto out; |
d96b1431 | 143 | } |
6b8213d9 | 144 | retry: |
e7ba108a | 145 | de = __f2fs_find_entry(dir, &fname, &page); |
418f6c27 | 146 | if (de && inode->i_ino == le32_to_cpu(de->ino)) |
bdbc90fa | 147 | goto out_put; |
418f6c27 | 148 | |
6b8213d9 | 149 | if (de) { |
e8ea9b3d | 150 | einode = f2fs_iget_retry(inode->i_sb, le32_to_cpu(de->ino)); |
6b8213d9 JK |
151 | if (IS_ERR(einode)) { |
152 | WARN_ON(1); | |
5c1f9927 CY |
153 | err = PTR_ERR(einode); |
154 | if (err == -ENOENT) | |
6b8213d9 | 155 | err = -EEXIST; |
bdbc90fa | 156 | goto out_put; |
2e5558f4 | 157 | } |
4b2414d0 CY |
158 | |
159 | err = dquot_initialize(einode); | |
160 | if (err) { | |
161 | iput(einode); | |
bdbc90fa | 162 | goto out_put; |
4b2414d0 CY |
163 | } |
164 | ||
4081363f | 165 | err = acquire_orphan_inode(F2FS_I_SB(inode)); |
2e5558f4 RK |
166 | if (err) { |
167 | iput(einode); | |
bdbc90fa | 168 | goto out_put; |
6b8213d9 | 169 | } |
dbeacf02 | 170 | f2fs_delete_entry(de, page, dir, einode); |
6b8213d9 JK |
171 | iput(einode); |
172 | goto retry; | |
91246c21 CY |
173 | } else if (IS_ERR(page)) { |
174 | err = PTR_ERR(page); | |
175 | } else { | |
e7ba108a | 176 | err = __f2fs_do_add_link(dir, &fname, inode, |
91246c21 | 177 | inode->i_ino, inode->i_mode); |
d624c96f | 178 | } |
e8ea9b3d JK |
179 | if (err == -ENOMEM) |
180 | goto retry; | |
2e5558f4 RK |
181 | goto out; |
182 | ||
bdbc90fa | 183 | out_put: |
2e5558f4 | 184 | f2fs_put_page(page, 0); |
d624c96f | 185 | out: |
e7ba108a SL |
186 | if (file_enc_name(inode)) |
187 | name = "<encrypted>"; | |
188 | else | |
189 | name = raw_inode->i_name; | |
6c311ec6 CF |
190 | f2fs_msg(inode->i_sb, KERN_NOTICE, |
191 | "%s: ino = %x, name = %s, dir = %lx, err = %d", | |
e7ba108a | 192 | __func__, ino_of_node(ipage), name, |
f28c06fa | 193 | IS_ERR(dir) ? 0 : dir->i_ino, err); |
d624c96f JK |
194 | return err; |
195 | } | |
196 | ||
37a086f0 JK |
197 | static void recover_inline_flags(struct inode *inode, struct f2fs_inode *ri) |
198 | { | |
199 | if (ri->i_inline & F2FS_PIN_FILE) | |
200 | set_inode_flag(inode, FI_PIN_FILE); | |
201 | else | |
202 | clear_inode_flag(inode, FI_PIN_FILE); | |
203 | if (ri->i_inline & F2FS_DATA_EXIST) | |
204 | set_inode_flag(inode, FI_DATA_EXIST); | |
205 | else | |
206 | clear_inode_flag(inode, FI_DATA_EXIST); | |
207 | if (!(ri->i_inline & F2FS_INLINE_DOTS)) | |
208 | clear_inode_flag(inode, FI_INLINE_DOTS); | |
209 | } | |
210 | ||
c52e1b10 | 211 | static void recover_inode(struct inode *inode, struct page *page) |
d624c96f | 212 | { |
441ac5cb | 213 | struct f2fs_inode *raw = F2FS_INODE(page); |
e7d55452 | 214 | char *name; |
441ac5cb JK |
215 | |
216 | inode->i_mode = le16_to_cpu(raw->i_mode); | |
fc9581c8 | 217 | f2fs_i_size_write(inode, le64_to_cpu(raw->i_size)); |
9f0552e0 | 218 | inode->i_atime.tv_sec = le64_to_cpu(raw->i_atime); |
441ac5cb JK |
219 | inode->i_ctime.tv_sec = le64_to_cpu(raw->i_ctime); |
220 | inode->i_mtime.tv_sec = le64_to_cpu(raw->i_mtime); | |
9f0552e0 | 221 | inode->i_atime.tv_nsec = le32_to_cpu(raw->i_atime_nsec); |
441ac5cb JK |
222 | inode->i_ctime.tv_nsec = le32_to_cpu(raw->i_ctime_nsec); |
223 | inode->i_mtime.tv_nsec = le32_to_cpu(raw->i_mtime_nsec); | |
f356fe0c | 224 | |
26787236 JK |
225 | F2FS_I(inode)->i_advise = raw->i_advise; |
226 | ||
37a086f0 JK |
227 | recover_inline_flags(inode, raw); |
228 | ||
e7d55452 JK |
229 | if (file_enc_name(inode)) |
230 | name = "<encrypted>"; | |
231 | else | |
232 | name = F2FS_INODE(page)->i_name; | |
233 | ||
37a086f0 JK |
234 | f2fs_msg(inode->i_sb, KERN_NOTICE, |
235 | "recover_inode: ino = %x, name = %s, inline = %x", | |
236 | ino_of_node(page), name, raw->i_inline); | |
d624c96f JK |
237 | } |
238 | ||
d40d30c5 JK |
239 | static int find_fsync_dnodes(struct f2fs_sb_info *sbi, struct list_head *head, |
240 | bool check_only) | |
d624c96f | 241 | { |
d624c96f | 242 | struct curseg_info *curseg; |
4c521f49 | 243 | struct page *page = NULL; |
d624c96f | 244 | block_t blkaddr; |
fb0e72c8 CY |
245 | unsigned int loop_cnt = 0; |
246 | unsigned int free_blocks = sbi->user_block_count - | |
247 | valid_user_blocks(sbi); | |
d624c96f JK |
248 | int err = 0; |
249 | ||
250 | /* get node pages in the current segment */ | |
251 | curseg = CURSEG_I(sbi, CURSEG_WARM_NODE); | |
695fd1ed | 252 | blkaddr = NEXT_FREE_BLKADDR(sbi, curseg); |
d624c96f | 253 | |
d624c96f JK |
254 | while (1) { |
255 | struct fsync_inode_entry *entry; | |
256 | ||
f0c9cada | 257 | if (!is_valid_blkaddr(sbi, blkaddr, META_POR)) |
4c521f49 | 258 | return 0; |
d624c96f | 259 | |
2b947003 | 260 | page = get_tmp_page(sbi, blkaddr); |
393ff91f | 261 | |
a468f0ef | 262 | if (!is_recoverable_dnode(page)) |
f356fe0c | 263 | break; |
d624c96f JK |
264 | |
265 | if (!is_fsync_dnode(page)) | |
266 | goto next; | |
267 | ||
268 | entry = get_fsync_inode(head, ino_of_node(page)); | |
d47b8715 | 269 | if (!entry) { |
4b2414d0 CY |
270 | bool quota_inode = false; |
271 | ||
d40d30c5 JK |
272 | if (!check_only && |
273 | IS_INODE(page) && is_dent_dnode(page)) { | |
6ead1142 JK |
274 | err = recover_inode_page(sbi, page); |
275 | if (err) | |
f356fe0c | 276 | break; |
4b2414d0 | 277 | quota_inode = true; |
d624c96f JK |
278 | } |
279 | ||
441ac5cb JK |
280 | /* |
281 | * CP | dnode(F) | inode(DF) | |
282 | * For this case, we should not give up now. | |
283 | */ | |
4b2414d0 CY |
284 | entry = add_fsync_inode(sbi, head, ino_of_node(page), |
285 | quota_inode); | |
f4702d61 JK |
286 | if (IS_ERR(entry)) { |
287 | err = PTR_ERR(entry); | |
8fbc418f JK |
288 | if (err == -ENOENT) { |
289 | err = 0; | |
441ac5cb | 290 | goto next; |
8fbc418f | 291 | } |
f356fe0c | 292 | break; |
d624c96f | 293 | } |
d624c96f | 294 | } |
addbe45b JK |
295 | entry->blkaddr = blkaddr; |
296 | ||
608514de JK |
297 | if (IS_INODE(page) && is_dent_dnode(page)) |
298 | entry->last_dentry = blkaddr; | |
d624c96f | 299 | next: |
fb0e72c8 CY |
300 | /* sanity check in order to detect looped node chain */ |
301 | if (++loop_cnt >= free_blocks || | |
302 | blkaddr == next_blkaddr_of_node(page)) { | |
303 | f2fs_msg(sbi->sb, KERN_NOTICE, | |
304 | "%s: detect looped node chain, " | |
305 | "blkaddr:%u, next:%u", | |
306 | __func__, blkaddr, next_blkaddr_of_node(page)); | |
307 | err = -EINVAL; | |
308 | break; | |
309 | } | |
310 | ||
d624c96f JK |
311 | /* check next segment */ |
312 | blkaddr = next_blkaddr_of_node(page); | |
4c521f49 | 313 | f2fs_put_page(page, 1); |
635aee1f CY |
314 | |
315 | ra_meta_pages_cond(sbi, blkaddr); | |
d624c96f | 316 | } |
4c521f49 | 317 | f2fs_put_page(page, 1); |
d624c96f JK |
318 | return err; |
319 | } | |
320 | ||
5ebefc5b | 321 | static void destroy_fsync_dnodes(struct list_head *head) |
d624c96f | 322 | { |
d8b79b2f DC |
323 | struct fsync_inode_entry *entry, *tmp; |
324 | ||
3f8ab270 CY |
325 | list_for_each_entry_safe(entry, tmp, head, list) |
326 | del_fsync_inode(entry); | |
d624c96f JK |
327 | } |
328 | ||
39cf72cf | 329 | static int check_index_in_prev_nodes(struct f2fs_sb_info *sbi, |
b292dcab | 330 | block_t blkaddr, struct dnode_of_data *dn) |
d624c96f JK |
331 | { |
332 | struct seg_entry *sentry; | |
333 | unsigned int segno = GET_SEGNO(sbi, blkaddr); | |
491c0854 | 334 | unsigned short blkoff = GET_BLKOFF_FROM_SEG0(sbi, blkaddr); |
f6517cfc | 335 | struct f2fs_summary_block *sum_node; |
d624c96f | 336 | struct f2fs_summary sum; |
f6517cfc | 337 | struct page *sum_page, *node_page; |
c9ef4810 | 338 | struct dnode_of_data tdn = *dn; |
b292dcab | 339 | nid_t ino, nid; |
d624c96f | 340 | struct inode *inode; |
de93653f | 341 | unsigned int offset; |
d624c96f JK |
342 | block_t bidx; |
343 | int i; | |
344 | ||
345 | sentry = get_seg_entry(sbi, segno); | |
346 | if (!f2fs_test_bit(blkoff, sentry->cur_valid_map)) | |
39cf72cf | 347 | return 0; |
d624c96f JK |
348 | |
349 | /* Get the previous summary */ | |
125c9fb1 | 350 | for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) { |
d624c96f JK |
351 | struct curseg_info *curseg = CURSEG_I(sbi, i); |
352 | if (curseg->segno == segno) { | |
353 | sum = curseg->sum_blk->entries[blkoff]; | |
f6517cfc | 354 | goto got_it; |
d624c96f JK |
355 | } |
356 | } | |
d624c96f | 357 | |
f6517cfc JK |
358 | sum_page = get_sum_page(sbi, segno); |
359 | sum_node = (struct f2fs_summary_block *)page_address(sum_page); | |
360 | sum = sum_node->entries[blkoff]; | |
361 | f2fs_put_page(sum_page, 1); | |
362 | got_it: | |
b292dcab JK |
363 | /* Use the locked dnode page and inode */ |
364 | nid = le32_to_cpu(sum.nid); | |
365 | if (dn->inode->i_ino == nid) { | |
b292dcab | 366 | tdn.nid = nid; |
c9ef4810 JK |
367 | if (!dn->inode_page_locked) |
368 | lock_page(dn->inode_page); | |
b292dcab | 369 | tdn.node_page = dn->inode_page; |
060dd67b | 370 | tdn.ofs_in_node = le16_to_cpu(sum.ofs_in_node); |
c9ef4810 | 371 | goto truncate_out; |
b292dcab | 372 | } else if (dn->nid == nid) { |
060dd67b | 373 | tdn.ofs_in_node = le16_to_cpu(sum.ofs_in_node); |
c9ef4810 | 374 | goto truncate_out; |
b292dcab JK |
375 | } |
376 | ||
d624c96f | 377 | /* Get the node page */ |
b292dcab | 378 | node_page = get_node_page(sbi, nid); |
39cf72cf JK |
379 | if (IS_ERR(node_page)) |
380 | return PTR_ERR(node_page); | |
de93653f JK |
381 | |
382 | offset = ofs_of_node(node_page); | |
d624c96f JK |
383 | ino = ino_of_node(node_page); |
384 | f2fs_put_page(node_page, 1); | |
385 | ||
60979115 | 386 | if (ino != dn->inode->i_ino) { |
4b2414d0 CY |
387 | int ret; |
388 | ||
60979115 | 389 | /* Deallocate previous index in the node page */ |
e8ea9b3d | 390 | inode = f2fs_iget_retry(sbi->sb, ino); |
60979115 JK |
391 | if (IS_ERR(inode)) |
392 | return PTR_ERR(inode); | |
4b2414d0 CY |
393 | |
394 | ret = dquot_initialize(inode); | |
395 | if (ret) { | |
396 | iput(inode); | |
397 | return ret; | |
398 | } | |
60979115 JK |
399 | } else { |
400 | inode = dn->inode; | |
401 | } | |
06025f4d | 402 | |
81ca7350 | 403 | bidx = start_bidx_of_node(offset, inode) + le16_to_cpu(sum.ofs_in_node); |
de93653f | 404 | |
c9ef4810 JK |
405 | /* |
406 | * if inode page is locked, unlock temporarily, but its reference | |
407 | * count keeps alive. | |
408 | */ | |
409 | if (ino == dn->inode->i_ino && dn->inode_page_locked) | |
410 | unlock_page(dn->inode_page); | |
411 | ||
412 | set_new_dnode(&tdn, inode, NULL, NULL, 0); | |
413 | if (get_dnode_of_data(&tdn, bidx, LOOKUP_NODE)) | |
414 | goto out; | |
415 | ||
416 | if (tdn.data_blkaddr == blkaddr) | |
417 | truncate_data_blocks_range(&tdn, 1); | |
418 | ||
419 | f2fs_put_dnode(&tdn); | |
420 | out: | |
421 | if (ino != dn->inode->i_ino) | |
60979115 | 422 | iput(inode); |
c9ef4810 JK |
423 | else if (dn->inode_page_locked) |
424 | lock_page(dn->inode_page); | |
425 | return 0; | |
426 | ||
427 | truncate_out: | |
7a2af766 CY |
428 | if (datablock_addr(tdn.inode, tdn.node_page, |
429 | tdn.ofs_in_node) == blkaddr) | |
c9ef4810 JK |
430 | truncate_data_blocks_range(&tdn, 1); |
431 | if (dn->inode->i_ino == nid && !dn->inode_page_locked) | |
432 | unlock_page(dn->inode_page); | |
39cf72cf | 433 | return 0; |
d624c96f JK |
434 | } |
435 | ||
6ead1142 | 436 | static int do_recover_data(struct f2fs_sb_info *sbi, struct inode *inode, |
e17d488b | 437 | struct page *page) |
d624c96f | 438 | { |
d624c96f | 439 | struct dnode_of_data dn; |
d624c96f | 440 | struct node_info ni; |
81ca7350 | 441 | unsigned int start, end; |
f356fe0c | 442 | int err = 0, recovered = 0; |
d624c96f | 443 | |
1c35a90e JK |
444 | /* step 1: recover xattr */ |
445 | if (IS_INODE(page)) { | |
446 | recover_inline_xattr(inode, page); | |
447 | } else if (f2fs_has_xattr_block(ofs_of_node(page))) { | |
e17d488b | 448 | err = recover_xattr_data(inode, page); |
d260081c CY |
449 | if (!err) |
450 | recovered++; | |
1e1bb4ba | 451 | goto out; |
1c35a90e | 452 | } |
1e1bb4ba | 453 | |
1c35a90e JK |
454 | /* step 2: recover inline data */ |
455 | if (recover_inline_data(inode, page)) | |
abb2366c JK |
456 | goto out; |
457 | ||
1c35a90e | 458 | /* step 3: recover data indices */ |
81ca7350 CY |
459 | start = start_bidx_of_node(ofs_of_node(page), inode); |
460 | end = start + ADDRS_PER_PAGE(page, inode); | |
d624c96f JK |
461 | |
462 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
e8ea9b3d | 463 | retry_dn: |
6ead1142 | 464 | err = get_dnode_of_data(&dn, start, ALLOC_NODE); |
e8ea9b3d JK |
465 | if (err) { |
466 | if (err == -ENOMEM) { | |
467 | congestion_wait(BLK_RW_ASYNC, HZ/50); | |
468 | goto retry_dn; | |
469 | } | |
1e1bb4ba | 470 | goto out; |
e8ea9b3d | 471 | } |
d624c96f | 472 | |
fec1d657 | 473 | f2fs_wait_on_page_writeback(dn.node_page, NODE, true); |
d624c96f JK |
474 | |
475 | get_node_info(sbi, dn.nid, &ni); | |
9850cf4a JK |
476 | f2fs_bug_on(sbi, ni.ino != ino_of_node(page)); |
477 | f2fs_bug_on(sbi, ofs_of_node(dn.node_page) != ofs_of_node(page)); | |
d624c96f | 478 | |
12a8343e | 479 | for (; start < end; start++, dn.ofs_in_node++) { |
d624c96f JK |
480 | block_t src, dest; |
481 | ||
7a2af766 CY |
482 | src = datablock_addr(dn.inode, dn.node_page, dn.ofs_in_node); |
483 | dest = datablock_addr(dn.inode, page, dn.ofs_in_node); | |
d624c96f | 484 | |
12a8343e CY |
485 | /* skip recovering if dest is the same as src */ |
486 | if (src == dest) | |
487 | continue; | |
488 | ||
489 | /* dest is invalid, just invalidate src block */ | |
490 | if (dest == NULL_ADDR) { | |
491 | truncate_data_blocks_range(&dn, 1); | |
492 | continue; | |
493 | } | |
494 | ||
26787236 | 495 | if (!file_keep_isize(inode) && |
dba79f38 CY |
496 | (i_size_read(inode) <= ((loff_t)start << PAGE_SHIFT))) |
497 | f2fs_i_size_write(inode, | |
498 | (loff_t)(start + 1) << PAGE_SHIFT); | |
26de9b11 | 499 | |
12a8343e CY |
500 | /* |
501 | * dest is reserved block, invalidate src block | |
502 | * and then reserve one new block in dnode page. | |
503 | */ | |
504 | if (dest == NEW_ADDR) { | |
505 | truncate_data_blocks_range(&dn, 1); | |
3b9b10f9 | 506 | reserve_new_block(&dn); |
12a8343e CY |
507 | continue; |
508 | } | |
509 | ||
510 | /* dest is valid block, try to recover from src to dest */ | |
511 | if (is_valid_blkaddr(sbi, dest, META_POR)) { | |
e03b07d9 | 512 | |
d624c96f | 513 | if (src == NULL_ADDR) { |
5d56b671 | 514 | err = reserve_new_block(&dn); |
975756c4 JK |
515 | #ifdef CONFIG_F2FS_FAULT_INJECTION |
516 | while (err) | |
517 | err = reserve_new_block(&dn); | |
518 | #endif | |
d624c96f | 519 | /* We should not get -ENOSPC */ |
9850cf4a | 520 | f2fs_bug_on(sbi, err); |
6f3ec995 JK |
521 | if (err) |
522 | goto err; | |
d624c96f | 523 | } |
e8ea9b3d | 524 | retry_prev: |
d624c96f | 525 | /* Check the previous node page having this index */ |
39cf72cf | 526 | err = check_index_in_prev_nodes(sbi, dest, &dn); |
e8ea9b3d JK |
527 | if (err) { |
528 | if (err == -ENOMEM) { | |
529 | congestion_wait(BLK_RW_ASYNC, HZ/50); | |
530 | goto retry_prev; | |
531 | } | |
39cf72cf | 532 | goto err; |
e8ea9b3d | 533 | } |
d624c96f | 534 | |
d624c96f | 535 | /* write dummy data page */ |
528e3459 | 536 | f2fs_replace_block(sbi, &dn, src, dest, |
28bc106b | 537 | ni.version, false, false); |
f356fe0c | 538 | recovered++; |
d624c96f | 539 | } |
d624c96f JK |
540 | } |
541 | ||
d624c96f JK |
542 | copy_node_footer(dn.node_page, page); |
543 | fill_node_footer(dn.node_page, dn.nid, ni.ino, | |
544 | ofs_of_node(page), false); | |
545 | set_page_dirty(dn.node_page); | |
39cf72cf | 546 | err: |
d624c96f | 547 | f2fs_put_dnode(&dn); |
1e1bb4ba | 548 | out: |
6c311ec6 | 549 | f2fs_msg(sbi->sb, KERN_NOTICE, |
26787236 JK |
550 | "recover_data: ino = %lx (i_size: %s) recovered = %d, err = %d", |
551 | inode->i_ino, | |
552 | file_keep_isize(inode) ? "keep" : "recover", | |
553 | recovered, err); | |
39cf72cf | 554 | return err; |
d624c96f JK |
555 | } |
556 | ||
f61cce5b CY |
557 | static int recover_data(struct f2fs_sb_info *sbi, struct list_head *inode_list, |
558 | struct list_head *dir_list) | |
d624c96f | 559 | { |
d624c96f | 560 | struct curseg_info *curseg; |
4c521f49 | 561 | struct page *page = NULL; |
6ead1142 | 562 | int err = 0; |
d624c96f JK |
563 | block_t blkaddr; |
564 | ||
565 | /* get node pages in the current segment */ | |
b7973f23 | 566 | curseg = CURSEG_I(sbi, CURSEG_WARM_NODE); |
d624c96f JK |
567 | blkaddr = NEXT_FREE_BLKADDR(sbi, curseg); |
568 | ||
d624c96f JK |
569 | while (1) { |
570 | struct fsync_inode_entry *entry; | |
571 | ||
f0c9cada | 572 | if (!is_valid_blkaddr(sbi, blkaddr, META_POR)) |
4c521f49 | 573 | break; |
d624c96f | 574 | |
635aee1f CY |
575 | ra_meta_pages_cond(sbi, blkaddr); |
576 | ||
2b947003 | 577 | page = get_tmp_page(sbi, blkaddr); |
393ff91f | 578 | |
a468f0ef | 579 | if (!is_recoverable_dnode(page)) { |
4c521f49 | 580 | f2fs_put_page(page, 1); |
45856aff | 581 | break; |
4c521f49 | 582 | } |
d624c96f | 583 | |
f61cce5b | 584 | entry = get_fsync_inode(inode_list, ino_of_node(page)); |
d624c96f JK |
585 | if (!entry) |
586 | goto next; | |
441ac5cb JK |
587 | /* |
588 | * inode(x) | CP | inode(x) | dnode(F) | |
589 | * In this case, we can lose the latest inode(x). | |
c52e1b10 | 590 | * So, call recover_inode for the inode update. |
441ac5cb | 591 | */ |
608514de | 592 | if (IS_INODE(page)) |
c52e1b10 JK |
593 | recover_inode(entry->inode, page); |
594 | if (entry->last_dentry == blkaddr) { | |
f61cce5b | 595 | err = recover_dentry(entry->inode, page, dir_list); |
c52e1b10 JK |
596 | if (err) { |
597 | f2fs_put_page(page, 1); | |
598 | break; | |
599 | } | |
600 | } | |
e17d488b | 601 | err = do_recover_data(sbi, entry->inode, page); |
4c521f49 JK |
602 | if (err) { |
603 | f2fs_put_page(page, 1); | |
45856aff | 604 | break; |
4c521f49 | 605 | } |
d624c96f | 606 | |
3f8ab270 CY |
607 | if (entry->blkaddr == blkaddr) |
608 | del_fsync_inode(entry); | |
d624c96f JK |
609 | next: |
610 | /* check next segment */ | |
611 | blkaddr = next_blkaddr_of_node(page); | |
4c521f49 | 612 | f2fs_put_page(page, 1); |
d624c96f | 613 | } |
6ead1142 JK |
614 | if (!err) |
615 | allocate_new_segments(sbi); | |
616 | return err; | |
d624c96f JK |
617 | } |
618 | ||
6781eabb | 619 | int recover_fsync_data(struct f2fs_sb_info *sbi, bool check_only) |
d624c96f JK |
620 | { |
621 | struct list_head inode_list; | |
f61cce5b | 622 | struct list_head dir_list; |
6ead1142 | 623 | int err; |
6781eabb | 624 | int ret = 0; |
4b2414d0 | 625 | unsigned long s_flags = sbi->sb->s_flags; |
aabe5136 | 626 | bool need_writecp = false; |
ea676733 JK |
627 | #ifdef CONFIG_QUOTA |
628 | int quota_enabled; | |
629 | #endif | |
d624c96f | 630 | |
1751e8a6 | 631 | if (s_flags & SB_RDONLY) { |
4b2414d0 | 632 | f2fs_msg(sbi->sb, KERN_INFO, "orphan cleanup on readonly fs"); |
1751e8a6 | 633 | sbi->sb->s_flags &= ~SB_RDONLY; |
4b2414d0 CY |
634 | } |
635 | ||
636 | #ifdef CONFIG_QUOTA | |
637 | /* Needed for iput() to work correctly and not trash data */ | |
1751e8a6 | 638 | sbi->sb->s_flags |= SB_ACTIVE; |
4b2414d0 | 639 | /* Turn on quotas so that they are updated correctly */ |
1751e8a6 | 640 | quota_enabled = f2fs_enable_quota_files(sbi, s_flags & SB_RDONLY); |
4b2414d0 CY |
641 | #endif |
642 | ||
d624c96f | 643 | fsync_entry_slab = f2fs_kmem_cache_create("f2fs_fsync_inode_entry", |
e8512d2e | 644 | sizeof(struct fsync_inode_entry)); |
4b2414d0 CY |
645 | if (!fsync_entry_slab) { |
646 | err = -ENOMEM; | |
647 | goto out; | |
648 | } | |
d624c96f JK |
649 | |
650 | INIT_LIST_HEAD(&inode_list); | |
f61cce5b | 651 | INIT_LIST_HEAD(&dir_list); |
d624c96f | 652 | |
14f4e690 JK |
653 | /* prevent checkpoint */ |
654 | mutex_lock(&sbi->cp_mutex); | |
655 | ||
315df839 | 656 | /* step #1: find fsynced inode numbers */ |
d40d30c5 | 657 | err = find_fsync_dnodes(sbi, &inode_list, check_only); |
6781eabb | 658 | if (err || list_empty(&inode_list)) |
4b2414d0 | 659 | goto skip; |
d624c96f | 660 | |
6781eabb JK |
661 | if (check_only) { |
662 | ret = 1; | |
4b2414d0 | 663 | goto skip; |
6781eabb | 664 | } |
d624c96f | 665 | |
aabe5136 | 666 | need_writecp = true; |
691c6fd2 | 667 | |
d624c96f | 668 | /* step #2: recover data */ |
f61cce5b | 669 | err = recover_data(sbi, &inode_list, &dir_list); |
b307384e | 670 | if (!err) |
9850cf4a | 671 | f2fs_bug_on(sbi, !list_empty(&inode_list)); |
4b2414d0 | 672 | skip: |
5ebefc5b | 673 | destroy_fsync_dnodes(&inode_list); |
cf2271e7 | 674 | |
4c521f49 JK |
675 | /* truncate meta pages to be used by the recovery */ |
676 | truncate_inode_pages_range(META_MAPPING(sbi), | |
09cbfeaf | 677 | (loff_t)MAIN_BLKADDR(sbi) << PAGE_SHIFT, -1); |
4c521f49 | 678 | |
cf2271e7 JK |
679 | if (err) { |
680 | truncate_inode_pages_final(NODE_MAPPING(sbi)); | |
681 | truncate_inode_pages_final(META_MAPPING(sbi)); | |
682 | } | |
683 | ||
caf0047e | 684 | clear_sbi_flag(sbi, SBI_POR_DOING); |
a468f0ef JK |
685 | mutex_unlock(&sbi->cp_mutex); |
686 | ||
9e1e6df4 JK |
687 | /* let's drop all the directory inodes for clean checkpoint */ |
688 | destroy_fsync_dnodes(&dir_list); | |
689 | ||
a468f0ef | 690 | if (!err && need_writecp) { |
75ab4cb8 | 691 | struct cp_control cpc = { |
10027551 | 692 | .reason = CP_RECOVERY, |
75ab4cb8 | 693 | }; |
c34f42e2 | 694 | err = write_checkpoint(sbi, &cpc); |
cf2271e7 | 695 | } |
f61cce5b | 696 | |
f61cce5b | 697 | kmem_cache_destroy(fsync_entry_slab); |
4b2414d0 CY |
698 | out: |
699 | #ifdef CONFIG_QUOTA | |
700 | /* Turn quotas off */ | |
ea676733 JK |
701 | if (quota_enabled) |
702 | f2fs_quota_off_umount(sbi->sb); | |
4b2414d0 | 703 | #endif |
1751e8a6 | 704 | sbi->sb->s_flags = s_flags; /* Restore SB_RDONLY status */ |
4b2414d0 | 705 | |
6781eabb | 706 | return ret ? ret: err; |
d624c96f | 707 | } |