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1 | /* |
2 | * This file is part of UBIFS. | |
3 | * | |
4 | * Copyright (C) 2006-2008 Nokia Corporation | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License version 2 as published by | |
8 | * the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
11 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
12 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
13 | * more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License along with | |
16 | * this program; if not, write to the Free Software Foundation, Inc., 51 | |
17 | * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
18 | * | |
19 | * Authors: Artem Bityutskiy (Битюцкий Артём) | |
20 | * Adrian Hunter | |
21 | */ | |
22 | ||
23 | /* | |
24 | * This file implements most of the debugging stuff which is compiled in only | |
25 | * when it is enabled. But some debugging check functions are implemented in | |
26 | * corresponding subsystem, just because they are closely related and utilize | |
27 | * various local functions of those subsystems. | |
28 | */ | |
29 | ||
30 | #define UBIFS_DBG_PRESERVE_UBI | |
31 | ||
32 | #include "ubifs.h" | |
33 | #include <linux/module.h> | |
34 | #include <linux/moduleparam.h> | |
35 | ||
36 | #ifdef CONFIG_UBIFS_FS_DEBUG | |
37 | ||
38 | DEFINE_SPINLOCK(dbg_lock); | |
39 | ||
40 | static char dbg_key_buf0[128]; | |
41 | static char dbg_key_buf1[128]; | |
42 | ||
43 | unsigned int ubifs_msg_flags = UBIFS_MSG_FLAGS_DEFAULT; | |
44 | unsigned int ubifs_chk_flags = UBIFS_CHK_FLAGS_DEFAULT; | |
45 | unsigned int ubifs_tst_flags; | |
46 | ||
47 | module_param_named(debug_msgs, ubifs_msg_flags, uint, S_IRUGO | S_IWUSR); | |
48 | module_param_named(debug_chks, ubifs_chk_flags, uint, S_IRUGO | S_IWUSR); | |
49 | module_param_named(debug_tsts, ubifs_tst_flags, uint, S_IRUGO | S_IWUSR); | |
50 | ||
51 | MODULE_PARM_DESC(debug_msgs, "Debug message type flags"); | |
52 | MODULE_PARM_DESC(debug_chks, "Debug check flags"); | |
53 | MODULE_PARM_DESC(debug_tsts, "Debug special test flags"); | |
54 | ||
55 | static const char *get_key_fmt(int fmt) | |
56 | { | |
57 | switch (fmt) { | |
58 | case UBIFS_SIMPLE_KEY_FMT: | |
59 | return "simple"; | |
60 | default: | |
61 | return "unknown/invalid format"; | |
62 | } | |
63 | } | |
64 | ||
65 | static const char *get_key_hash(int hash) | |
66 | { | |
67 | switch (hash) { | |
68 | case UBIFS_KEY_HASH_R5: | |
69 | return "R5"; | |
70 | case UBIFS_KEY_HASH_TEST: | |
71 | return "test"; | |
72 | default: | |
73 | return "unknown/invalid name hash"; | |
74 | } | |
75 | } | |
76 | ||
77 | static const char *get_key_type(int type) | |
78 | { | |
79 | switch (type) { | |
80 | case UBIFS_INO_KEY: | |
81 | return "inode"; | |
82 | case UBIFS_DENT_KEY: | |
83 | return "direntry"; | |
84 | case UBIFS_XENT_KEY: | |
85 | return "xentry"; | |
86 | case UBIFS_DATA_KEY: | |
87 | return "data"; | |
88 | case UBIFS_TRUN_KEY: | |
89 | return "truncate"; | |
90 | default: | |
91 | return "unknown/invalid key"; | |
92 | } | |
93 | } | |
94 | ||
95 | static void sprintf_key(const struct ubifs_info *c, const union ubifs_key *key, | |
96 | char *buffer) | |
97 | { | |
98 | char *p = buffer; | |
99 | int type = key_type(c, key); | |
100 | ||
101 | if (c->key_fmt == UBIFS_SIMPLE_KEY_FMT) { | |
102 | switch (type) { | |
103 | case UBIFS_INO_KEY: | |
104 | sprintf(p, "(%lu, %s)", key_inum(c, key), | |
105 | get_key_type(type)); | |
106 | break; | |
107 | case UBIFS_DENT_KEY: | |
108 | case UBIFS_XENT_KEY: | |
109 | sprintf(p, "(%lu, %s, %#08x)", key_inum(c, key), | |
110 | get_key_type(type), key_hash(c, key)); | |
111 | break; | |
112 | case UBIFS_DATA_KEY: | |
113 | sprintf(p, "(%lu, %s, %u)", key_inum(c, key), | |
114 | get_key_type(type), key_block(c, key)); | |
115 | break; | |
116 | case UBIFS_TRUN_KEY: | |
117 | sprintf(p, "(%lu, %s)", | |
118 | key_inum(c, key), get_key_type(type)); | |
119 | break; | |
120 | default: | |
121 | sprintf(p, "(bad key type: %#08x, %#08x)", | |
122 | key->u32[0], key->u32[1]); | |
123 | } | |
124 | } else | |
125 | sprintf(p, "bad key format %d", c->key_fmt); | |
126 | } | |
127 | ||
128 | const char *dbg_key_str0(const struct ubifs_info *c, const union ubifs_key *key) | |
129 | { | |
130 | /* dbg_lock must be held */ | |
131 | sprintf_key(c, key, dbg_key_buf0); | |
132 | return dbg_key_buf0; | |
133 | } | |
134 | ||
135 | const char *dbg_key_str1(const struct ubifs_info *c, const union ubifs_key *key) | |
136 | { | |
137 | /* dbg_lock must be held */ | |
138 | sprintf_key(c, key, dbg_key_buf1); | |
139 | return dbg_key_buf1; | |
140 | } | |
141 | ||
142 | const char *dbg_ntype(int type) | |
143 | { | |
144 | switch (type) { | |
145 | case UBIFS_PAD_NODE: | |
146 | return "padding node"; | |
147 | case UBIFS_SB_NODE: | |
148 | return "superblock node"; | |
149 | case UBIFS_MST_NODE: | |
150 | return "master node"; | |
151 | case UBIFS_REF_NODE: | |
152 | return "reference node"; | |
153 | case UBIFS_INO_NODE: | |
154 | return "inode node"; | |
155 | case UBIFS_DENT_NODE: | |
156 | return "direntry node"; | |
157 | case UBIFS_XENT_NODE: | |
158 | return "xentry node"; | |
159 | case UBIFS_DATA_NODE: | |
160 | return "data node"; | |
161 | case UBIFS_TRUN_NODE: | |
162 | return "truncate node"; | |
163 | case UBIFS_IDX_NODE: | |
164 | return "indexing node"; | |
165 | case UBIFS_CS_NODE: | |
166 | return "commit start node"; | |
167 | case UBIFS_ORPH_NODE: | |
168 | return "orphan node"; | |
169 | default: | |
170 | return "unknown node"; | |
171 | } | |
172 | } | |
173 | ||
174 | static const char *dbg_gtype(int type) | |
175 | { | |
176 | switch (type) { | |
177 | case UBIFS_NO_NODE_GROUP: | |
178 | return "no node group"; | |
179 | case UBIFS_IN_NODE_GROUP: | |
180 | return "in node group"; | |
181 | case UBIFS_LAST_OF_NODE_GROUP: | |
182 | return "last of node group"; | |
183 | default: | |
184 | return "unknown"; | |
185 | } | |
186 | } | |
187 | ||
188 | const char *dbg_cstate(int cmt_state) | |
189 | { | |
190 | switch (cmt_state) { | |
191 | case COMMIT_RESTING: | |
192 | return "commit resting"; | |
193 | case COMMIT_BACKGROUND: | |
194 | return "background commit requested"; | |
195 | case COMMIT_REQUIRED: | |
196 | return "commit required"; | |
197 | case COMMIT_RUNNING_BACKGROUND: | |
198 | return "BACKGROUND commit running"; | |
199 | case COMMIT_RUNNING_REQUIRED: | |
200 | return "commit running and required"; | |
201 | case COMMIT_BROKEN: | |
202 | return "broken commit"; | |
203 | default: | |
204 | return "unknown commit state"; | |
205 | } | |
206 | } | |
207 | ||
208 | static void dump_ch(const struct ubifs_ch *ch) | |
209 | { | |
210 | printk(KERN_DEBUG "\tmagic %#x\n", le32_to_cpu(ch->magic)); | |
211 | printk(KERN_DEBUG "\tcrc %#x\n", le32_to_cpu(ch->crc)); | |
212 | printk(KERN_DEBUG "\tnode_type %d (%s)\n", ch->node_type, | |
213 | dbg_ntype(ch->node_type)); | |
214 | printk(KERN_DEBUG "\tgroup_type %d (%s)\n", ch->group_type, | |
215 | dbg_gtype(ch->group_type)); | |
216 | printk(KERN_DEBUG "\tsqnum %llu\n", | |
217 | (unsigned long long)le64_to_cpu(ch->sqnum)); | |
218 | printk(KERN_DEBUG "\tlen %u\n", le32_to_cpu(ch->len)); | |
219 | } | |
220 | ||
221 | void dbg_dump_inode(const struct ubifs_info *c, const struct inode *inode) | |
222 | { | |
223 | const struct ubifs_inode *ui = ubifs_inode(inode); | |
224 | ||
225 | printk(KERN_DEBUG "inode %lu\n", inode->i_ino); | |
226 | printk(KERN_DEBUG "size %llu\n", | |
227 | (unsigned long long)i_size_read(inode)); | |
228 | printk(KERN_DEBUG "nlink %u\n", inode->i_nlink); | |
229 | printk(KERN_DEBUG "uid %u\n", (unsigned int)inode->i_uid); | |
230 | printk(KERN_DEBUG "gid %u\n", (unsigned int)inode->i_gid); | |
231 | printk(KERN_DEBUG "atime %u.%u\n", | |
232 | (unsigned int)inode->i_atime.tv_sec, | |
233 | (unsigned int)inode->i_atime.tv_nsec); | |
234 | printk(KERN_DEBUG "mtime %u.%u\n", | |
235 | (unsigned int)inode->i_mtime.tv_sec, | |
236 | (unsigned int)inode->i_mtime.tv_nsec); | |
237 | printk(KERN_DEBUG "ctime %u.%u\n", | |
238 | (unsigned int)inode->i_ctime.tv_sec, | |
239 | (unsigned int)inode->i_ctime.tv_nsec); | |
240 | printk(KERN_DEBUG "creat_sqnum %llu\n", ui->creat_sqnum); | |
241 | printk(KERN_DEBUG "xattr_size %u\n", ui->xattr_size); | |
242 | printk(KERN_DEBUG "xattr_cnt %u\n", ui->xattr_cnt); | |
243 | printk(KERN_DEBUG "xattr_names %u\n", ui->xattr_names); | |
244 | printk(KERN_DEBUG "dirty %u\n", ui->dirty); | |
245 | printk(KERN_DEBUG "xattr %u\n", ui->xattr); | |
246 | printk(KERN_DEBUG "flags %d\n", ui->flags); | |
247 | printk(KERN_DEBUG "compr_type %d\n", ui->compr_type); | |
248 | printk(KERN_DEBUG "data_len %d\n", ui->data_len); | |
249 | } | |
250 | ||
251 | void dbg_dump_node(const struct ubifs_info *c, const void *node) | |
252 | { | |
253 | int i, n; | |
254 | union ubifs_key key; | |
255 | const struct ubifs_ch *ch = node; | |
256 | ||
257 | if (dbg_failure_mode) | |
258 | return; | |
259 | ||
260 | /* If the magic is incorrect, just hexdump the first bytes */ | |
261 | if (le32_to_cpu(ch->magic) != UBIFS_NODE_MAGIC) { | |
262 | printk(KERN_DEBUG "Not a node, first %zu bytes:", UBIFS_CH_SZ); | |
263 | print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 32, 1, | |
264 | (void *)node, UBIFS_CH_SZ, 1); | |
265 | return; | |
266 | } | |
267 | ||
268 | spin_lock(&dbg_lock); | |
269 | dump_ch(node); | |
270 | ||
271 | switch (ch->node_type) { | |
272 | case UBIFS_PAD_NODE: | |
273 | { | |
274 | const struct ubifs_pad_node *pad = node; | |
275 | ||
276 | printk(KERN_DEBUG "\tpad_len %u\n", | |
277 | le32_to_cpu(pad->pad_len)); | |
278 | break; | |
279 | } | |
280 | case UBIFS_SB_NODE: | |
281 | { | |
282 | const struct ubifs_sb_node *sup = node; | |
283 | unsigned int sup_flags = le32_to_cpu(sup->flags); | |
284 | ||
285 | printk(KERN_DEBUG "\tkey_hash %d (%s)\n", | |
286 | (int)sup->key_hash, get_key_hash(sup->key_hash)); | |
287 | printk(KERN_DEBUG "\tkey_fmt %d (%s)\n", | |
288 | (int)sup->key_fmt, get_key_fmt(sup->key_fmt)); | |
289 | printk(KERN_DEBUG "\tflags %#x\n", sup_flags); | |
290 | printk(KERN_DEBUG "\t big_lpt %u\n", | |
291 | !!(sup_flags & UBIFS_FLG_BIGLPT)); | |
292 | printk(KERN_DEBUG "\tmin_io_size %u\n", | |
293 | le32_to_cpu(sup->min_io_size)); | |
294 | printk(KERN_DEBUG "\tleb_size %u\n", | |
295 | le32_to_cpu(sup->leb_size)); | |
296 | printk(KERN_DEBUG "\tleb_cnt %u\n", | |
297 | le32_to_cpu(sup->leb_cnt)); | |
298 | printk(KERN_DEBUG "\tmax_leb_cnt %u\n", | |
299 | le32_to_cpu(sup->max_leb_cnt)); | |
300 | printk(KERN_DEBUG "\tmax_bud_bytes %llu\n", | |
301 | (unsigned long long)le64_to_cpu(sup->max_bud_bytes)); | |
302 | printk(KERN_DEBUG "\tlog_lebs %u\n", | |
303 | le32_to_cpu(sup->log_lebs)); | |
304 | printk(KERN_DEBUG "\tlpt_lebs %u\n", | |
305 | le32_to_cpu(sup->lpt_lebs)); | |
306 | printk(KERN_DEBUG "\torph_lebs %u\n", | |
307 | le32_to_cpu(sup->orph_lebs)); | |
308 | printk(KERN_DEBUG "\tjhead_cnt %u\n", | |
309 | le32_to_cpu(sup->jhead_cnt)); | |
310 | printk(KERN_DEBUG "\tfanout %u\n", | |
311 | le32_to_cpu(sup->fanout)); | |
312 | printk(KERN_DEBUG "\tlsave_cnt %u\n", | |
313 | le32_to_cpu(sup->lsave_cnt)); | |
314 | printk(KERN_DEBUG "\tdefault_compr %u\n", | |
315 | (int)le16_to_cpu(sup->default_compr)); | |
316 | printk(KERN_DEBUG "\trp_size %llu\n", | |
317 | (unsigned long long)le64_to_cpu(sup->rp_size)); | |
318 | printk(KERN_DEBUG "\trp_uid %u\n", | |
319 | le32_to_cpu(sup->rp_uid)); | |
320 | printk(KERN_DEBUG "\trp_gid %u\n", | |
321 | le32_to_cpu(sup->rp_gid)); | |
322 | printk(KERN_DEBUG "\tfmt_version %u\n", | |
323 | le32_to_cpu(sup->fmt_version)); | |
324 | printk(KERN_DEBUG "\ttime_gran %u\n", | |
325 | le32_to_cpu(sup->time_gran)); | |
326 | printk(KERN_DEBUG "\tUUID %02X%02X%02X%02X-%02X%02X" | |
327 | "-%02X%02X-%02X%02X-%02X%02X%02X%02X%02X%02X\n", | |
328 | sup->uuid[0], sup->uuid[1], sup->uuid[2], sup->uuid[3], | |
329 | sup->uuid[4], sup->uuid[5], sup->uuid[6], sup->uuid[7], | |
330 | sup->uuid[8], sup->uuid[9], sup->uuid[10], sup->uuid[11], | |
331 | sup->uuid[12], sup->uuid[13], sup->uuid[14], | |
332 | sup->uuid[15]); | |
333 | break; | |
334 | } | |
335 | case UBIFS_MST_NODE: | |
336 | { | |
337 | const struct ubifs_mst_node *mst = node; | |
338 | ||
339 | printk(KERN_DEBUG "\thighest_inum %llu\n", | |
340 | (unsigned long long)le64_to_cpu(mst->highest_inum)); | |
341 | printk(KERN_DEBUG "\tcommit number %llu\n", | |
342 | (unsigned long long)le64_to_cpu(mst->cmt_no)); | |
343 | printk(KERN_DEBUG "\tflags %#x\n", | |
344 | le32_to_cpu(mst->flags)); | |
345 | printk(KERN_DEBUG "\tlog_lnum %u\n", | |
346 | le32_to_cpu(mst->log_lnum)); | |
347 | printk(KERN_DEBUG "\troot_lnum %u\n", | |
348 | le32_to_cpu(mst->root_lnum)); | |
349 | printk(KERN_DEBUG "\troot_offs %u\n", | |
350 | le32_to_cpu(mst->root_offs)); | |
351 | printk(KERN_DEBUG "\troot_len %u\n", | |
352 | le32_to_cpu(mst->root_len)); | |
353 | printk(KERN_DEBUG "\tgc_lnum %u\n", | |
354 | le32_to_cpu(mst->gc_lnum)); | |
355 | printk(KERN_DEBUG "\tihead_lnum %u\n", | |
356 | le32_to_cpu(mst->ihead_lnum)); | |
357 | printk(KERN_DEBUG "\tihead_offs %u\n", | |
358 | le32_to_cpu(mst->ihead_offs)); | |
359 | printk(KERN_DEBUG "\tindex_size %u\n", | |
360 | le32_to_cpu(mst->index_size)); | |
361 | printk(KERN_DEBUG "\tlpt_lnum %u\n", | |
362 | le32_to_cpu(mst->lpt_lnum)); | |
363 | printk(KERN_DEBUG "\tlpt_offs %u\n", | |
364 | le32_to_cpu(mst->lpt_offs)); | |
365 | printk(KERN_DEBUG "\tnhead_lnum %u\n", | |
366 | le32_to_cpu(mst->nhead_lnum)); | |
367 | printk(KERN_DEBUG "\tnhead_offs %u\n", | |
368 | le32_to_cpu(mst->nhead_offs)); | |
369 | printk(KERN_DEBUG "\tltab_lnum %u\n", | |
370 | le32_to_cpu(mst->ltab_lnum)); | |
371 | printk(KERN_DEBUG "\tltab_offs %u\n", | |
372 | le32_to_cpu(mst->ltab_offs)); | |
373 | printk(KERN_DEBUG "\tlsave_lnum %u\n", | |
374 | le32_to_cpu(mst->lsave_lnum)); | |
375 | printk(KERN_DEBUG "\tlsave_offs %u\n", | |
376 | le32_to_cpu(mst->lsave_offs)); | |
377 | printk(KERN_DEBUG "\tlscan_lnum %u\n", | |
378 | le32_to_cpu(mst->lscan_lnum)); | |
379 | printk(KERN_DEBUG "\tleb_cnt %u\n", | |
380 | le32_to_cpu(mst->leb_cnt)); | |
381 | printk(KERN_DEBUG "\tempty_lebs %u\n", | |
382 | le32_to_cpu(mst->empty_lebs)); | |
383 | printk(KERN_DEBUG "\tidx_lebs %u\n", | |
384 | le32_to_cpu(mst->idx_lebs)); | |
385 | printk(KERN_DEBUG "\ttotal_free %llu\n", | |
386 | (unsigned long long)le64_to_cpu(mst->total_free)); | |
387 | printk(KERN_DEBUG "\ttotal_dirty %llu\n", | |
388 | (unsigned long long)le64_to_cpu(mst->total_dirty)); | |
389 | printk(KERN_DEBUG "\ttotal_used %llu\n", | |
390 | (unsigned long long)le64_to_cpu(mst->total_used)); | |
391 | printk(KERN_DEBUG "\ttotal_dead %llu\n", | |
392 | (unsigned long long)le64_to_cpu(mst->total_dead)); | |
393 | printk(KERN_DEBUG "\ttotal_dark %llu\n", | |
394 | (unsigned long long)le64_to_cpu(mst->total_dark)); | |
395 | break; | |
396 | } | |
397 | case UBIFS_REF_NODE: | |
398 | { | |
399 | const struct ubifs_ref_node *ref = node; | |
400 | ||
401 | printk(KERN_DEBUG "\tlnum %u\n", | |
402 | le32_to_cpu(ref->lnum)); | |
403 | printk(KERN_DEBUG "\toffs %u\n", | |
404 | le32_to_cpu(ref->offs)); | |
405 | printk(KERN_DEBUG "\tjhead %u\n", | |
406 | le32_to_cpu(ref->jhead)); | |
407 | break; | |
408 | } | |
409 | case UBIFS_INO_NODE: | |
410 | { | |
411 | const struct ubifs_ino_node *ino = node; | |
412 | ||
413 | key_read(c, &ino->key, &key); | |
414 | printk(KERN_DEBUG "\tkey %s\n", DBGKEY(&key)); | |
415 | printk(KERN_DEBUG "\tcreat_sqnum %llu\n", | |
416 | (unsigned long long)le64_to_cpu(ino->creat_sqnum)); | |
417 | printk(KERN_DEBUG "\tsize %llu\n", | |
418 | (unsigned long long)le64_to_cpu(ino->size)); | |
419 | printk(KERN_DEBUG "\tnlink %u\n", | |
420 | le32_to_cpu(ino->nlink)); | |
421 | printk(KERN_DEBUG "\tatime %lld.%u\n", | |
422 | (long long)le64_to_cpu(ino->atime_sec), | |
423 | le32_to_cpu(ino->atime_nsec)); | |
424 | printk(KERN_DEBUG "\tmtime %lld.%u\n", | |
425 | (long long)le64_to_cpu(ino->mtime_sec), | |
426 | le32_to_cpu(ino->mtime_nsec)); | |
427 | printk(KERN_DEBUG "\tctime %lld.%u\n", | |
428 | (long long)le64_to_cpu(ino->ctime_sec), | |
429 | le32_to_cpu(ino->ctime_nsec)); | |
430 | printk(KERN_DEBUG "\tuid %u\n", | |
431 | le32_to_cpu(ino->uid)); | |
432 | printk(KERN_DEBUG "\tgid %u\n", | |
433 | le32_to_cpu(ino->gid)); | |
434 | printk(KERN_DEBUG "\tmode %u\n", | |
435 | le32_to_cpu(ino->mode)); | |
436 | printk(KERN_DEBUG "\tflags %#x\n", | |
437 | le32_to_cpu(ino->flags)); | |
438 | printk(KERN_DEBUG "\txattr_cnt %u\n", | |
439 | le32_to_cpu(ino->xattr_cnt)); | |
440 | printk(KERN_DEBUG "\txattr_size %u\n", | |
441 | le32_to_cpu(ino->xattr_size)); | |
442 | printk(KERN_DEBUG "\txattr_names %u\n", | |
443 | le32_to_cpu(ino->xattr_names)); | |
444 | printk(KERN_DEBUG "\tcompr_type %#x\n", | |
445 | (int)le16_to_cpu(ino->compr_type)); | |
446 | printk(KERN_DEBUG "\tdata len %u\n", | |
447 | le32_to_cpu(ino->data_len)); | |
448 | break; | |
449 | } | |
450 | case UBIFS_DENT_NODE: | |
451 | case UBIFS_XENT_NODE: | |
452 | { | |
453 | const struct ubifs_dent_node *dent = node; | |
454 | int nlen = le16_to_cpu(dent->nlen); | |
455 | ||
456 | key_read(c, &dent->key, &key); | |
457 | printk(KERN_DEBUG "\tkey %s\n", DBGKEY(&key)); | |
458 | printk(KERN_DEBUG "\tinum %llu\n", | |
459 | (unsigned long long)le64_to_cpu(dent->inum)); | |
460 | printk(KERN_DEBUG "\ttype %d\n", (int)dent->type); | |
461 | printk(KERN_DEBUG "\tnlen %d\n", nlen); | |
462 | printk(KERN_DEBUG "\tname "); | |
463 | ||
464 | if (nlen > UBIFS_MAX_NLEN) | |
465 | printk(KERN_DEBUG "(bad name length, not printing, " | |
466 | "bad or corrupted node)"); | |
467 | else { | |
468 | for (i = 0; i < nlen && dent->name[i]; i++) | |
469 | printk("%c", dent->name[i]); | |
470 | } | |
471 | printk("\n"); | |
472 | ||
473 | break; | |
474 | } | |
475 | case UBIFS_DATA_NODE: | |
476 | { | |
477 | const struct ubifs_data_node *dn = node; | |
478 | int dlen = le32_to_cpu(ch->len) - UBIFS_DATA_NODE_SZ; | |
479 | ||
480 | key_read(c, &dn->key, &key); | |
481 | printk(KERN_DEBUG "\tkey %s\n", DBGKEY(&key)); | |
482 | printk(KERN_DEBUG "\tsize %u\n", | |
483 | le32_to_cpu(dn->size)); | |
484 | printk(KERN_DEBUG "\tcompr_typ %d\n", | |
485 | (int)le16_to_cpu(dn->compr_type)); | |
486 | printk(KERN_DEBUG "\tdata size %d\n", | |
487 | dlen); | |
488 | printk(KERN_DEBUG "\tdata:\n"); | |
489 | print_hex_dump(KERN_DEBUG, "\t", DUMP_PREFIX_OFFSET, 32, 1, | |
490 | (void *)&dn->data, dlen, 0); | |
491 | break; | |
492 | } | |
493 | case UBIFS_TRUN_NODE: | |
494 | { | |
495 | const struct ubifs_trun_node *trun = node; | |
496 | ||
497 | printk(KERN_DEBUG "\tinum %u\n", | |
498 | le32_to_cpu(trun->inum)); | |
499 | printk(KERN_DEBUG "\told_size %llu\n", | |
500 | (unsigned long long)le64_to_cpu(trun->old_size)); | |
501 | printk(KERN_DEBUG "\tnew_size %llu\n", | |
502 | (unsigned long long)le64_to_cpu(trun->new_size)); | |
503 | break; | |
504 | } | |
505 | case UBIFS_IDX_NODE: | |
506 | { | |
507 | const struct ubifs_idx_node *idx = node; | |
508 | ||
509 | n = le16_to_cpu(idx->child_cnt); | |
510 | printk(KERN_DEBUG "\tchild_cnt %d\n", n); | |
511 | printk(KERN_DEBUG "\tlevel %d\n", | |
512 | (int)le16_to_cpu(idx->level)); | |
513 | printk(KERN_DEBUG "\tBranches:\n"); | |
514 | ||
515 | for (i = 0; i < n && i < c->fanout - 1; i++) { | |
516 | const struct ubifs_branch *br; | |
517 | ||
518 | br = ubifs_idx_branch(c, idx, i); | |
519 | key_read(c, &br->key, &key); | |
520 | printk(KERN_DEBUG "\t%d: LEB %d:%d len %d key %s\n", | |
521 | i, le32_to_cpu(br->lnum), le32_to_cpu(br->offs), | |
522 | le32_to_cpu(br->len), DBGKEY(&key)); | |
523 | } | |
524 | break; | |
525 | } | |
526 | case UBIFS_CS_NODE: | |
527 | break; | |
528 | case UBIFS_ORPH_NODE: | |
529 | { | |
530 | const struct ubifs_orph_node *orph = node; | |
531 | ||
532 | printk(KERN_DEBUG "\tcommit number %llu\n", | |
533 | (unsigned long long) | |
534 | le64_to_cpu(orph->cmt_no) & LLONG_MAX); | |
535 | printk(KERN_DEBUG "\tlast node flag %llu\n", | |
536 | (unsigned long long)(le64_to_cpu(orph->cmt_no)) >> 63); | |
537 | n = (le32_to_cpu(ch->len) - UBIFS_ORPH_NODE_SZ) >> 3; | |
538 | printk(KERN_DEBUG "\t%d orphan inode numbers:\n", n); | |
539 | for (i = 0; i < n; i++) | |
540 | printk(KERN_DEBUG "\t ino %llu\n", | |
541 | le64_to_cpu(orph->inos[i])); | |
542 | break; | |
543 | } | |
544 | default: | |
545 | printk(KERN_DEBUG "node type %d was not recognized\n", | |
546 | (int)ch->node_type); | |
547 | } | |
548 | spin_unlock(&dbg_lock); | |
549 | } | |
550 | ||
551 | void dbg_dump_budget_req(const struct ubifs_budget_req *req) | |
552 | { | |
553 | spin_lock(&dbg_lock); | |
554 | printk(KERN_DEBUG "Budgeting request: new_ino %d, dirtied_ino %d\n", | |
555 | req->new_ino, req->dirtied_ino); | |
556 | printk(KERN_DEBUG "\tnew_ino_d %d, dirtied_ino_d %d\n", | |
557 | req->new_ino_d, req->dirtied_ino_d); | |
558 | printk(KERN_DEBUG "\tnew_page %d, dirtied_page %d\n", | |
559 | req->new_page, req->dirtied_page); | |
560 | printk(KERN_DEBUG "\tnew_dent %d, mod_dent %d\n", | |
561 | req->new_dent, req->mod_dent); | |
562 | printk(KERN_DEBUG "\tidx_growth %d\n", req->idx_growth); | |
563 | printk(KERN_DEBUG "\tdata_growth %d dd_growth %d\n", | |
564 | req->data_growth, req->dd_growth); | |
565 | spin_unlock(&dbg_lock); | |
566 | } | |
567 | ||
568 | void dbg_dump_lstats(const struct ubifs_lp_stats *lst) | |
569 | { | |
570 | spin_lock(&dbg_lock); | |
571 | printk(KERN_DEBUG "Lprops statistics: empty_lebs %d, idx_lebs %d\n", | |
572 | lst->empty_lebs, lst->idx_lebs); | |
573 | printk(KERN_DEBUG "\ttaken_empty_lebs %d, total_free %lld, " | |
574 | "total_dirty %lld\n", lst->taken_empty_lebs, lst->total_free, | |
575 | lst->total_dirty); | |
576 | printk(KERN_DEBUG "\ttotal_used %lld, total_dark %lld, " | |
577 | "total_dead %lld\n", lst->total_used, lst->total_dark, | |
578 | lst->total_dead); | |
579 | spin_unlock(&dbg_lock); | |
580 | } | |
581 | ||
582 | void dbg_dump_budg(struct ubifs_info *c) | |
583 | { | |
584 | int i; | |
585 | struct rb_node *rb; | |
586 | struct ubifs_bud *bud; | |
587 | struct ubifs_gced_idx_leb *idx_gc; | |
588 | ||
589 | spin_lock(&dbg_lock); | |
590 | printk(KERN_DEBUG "Budgeting info: budg_data_growth %lld, " | |
591 | "budg_dd_growth %lld, budg_idx_growth %lld\n", | |
592 | c->budg_data_growth, c->budg_dd_growth, c->budg_idx_growth); | |
593 | printk(KERN_DEBUG "\tdata budget sum %lld, total budget sum %lld, " | |
594 | "freeable_cnt %d\n", c->budg_data_growth + c->budg_dd_growth, | |
595 | c->budg_data_growth + c->budg_dd_growth + c->budg_idx_growth, | |
596 | c->freeable_cnt); | |
597 | printk(KERN_DEBUG "\tmin_idx_lebs %d, old_idx_sz %lld, " | |
598 | "calc_idx_sz %lld, idx_gc_cnt %d\n", c->min_idx_lebs, | |
599 | c->old_idx_sz, c->calc_idx_sz, c->idx_gc_cnt); | |
600 | printk(KERN_DEBUG "\tdirty_pg_cnt %ld, dirty_zn_cnt %ld, " | |
601 | "clean_zn_cnt %ld\n", atomic_long_read(&c->dirty_pg_cnt), | |
602 | atomic_long_read(&c->dirty_zn_cnt), | |
603 | atomic_long_read(&c->clean_zn_cnt)); | |
604 | printk(KERN_DEBUG "\tdark_wm %d, dead_wm %d, max_idx_node_sz %d\n", | |
605 | c->dark_wm, c->dead_wm, c->max_idx_node_sz); | |
606 | printk(KERN_DEBUG "\tgc_lnum %d, ihead_lnum %d\n", | |
607 | c->gc_lnum, c->ihead_lnum); | |
608 | for (i = 0; i < c->jhead_cnt; i++) | |
609 | printk(KERN_DEBUG "\tjhead %d\t LEB %d\n", | |
610 | c->jheads[i].wbuf.jhead, c->jheads[i].wbuf.lnum); | |
611 | for (rb = rb_first(&c->buds); rb; rb = rb_next(rb)) { | |
612 | bud = rb_entry(rb, struct ubifs_bud, rb); | |
613 | printk(KERN_DEBUG "\tbud LEB %d\n", bud->lnum); | |
614 | } | |
615 | list_for_each_entry(bud, &c->old_buds, list) | |
616 | printk(KERN_DEBUG "\told bud LEB %d\n", bud->lnum); | |
617 | list_for_each_entry(idx_gc, &c->idx_gc, list) | |
618 | printk(KERN_DEBUG "\tGC'ed idx LEB %d unmap %d\n", | |
619 | idx_gc->lnum, idx_gc->unmap); | |
620 | printk(KERN_DEBUG "\tcommit state %d\n", c->cmt_state); | |
621 | spin_unlock(&dbg_lock); | |
622 | } | |
623 | ||
624 | void dbg_dump_lprop(const struct ubifs_info *c, const struct ubifs_lprops *lp) | |
625 | { | |
626 | printk(KERN_DEBUG "LEB %d lprops: free %d, dirty %d (used %d), " | |
627 | "flags %#x\n", lp->lnum, lp->free, lp->dirty, | |
628 | c->leb_size - lp->free - lp->dirty, lp->flags); | |
629 | } | |
630 | ||
631 | void dbg_dump_lprops(struct ubifs_info *c) | |
632 | { | |
633 | int lnum, err; | |
634 | struct ubifs_lprops lp; | |
635 | struct ubifs_lp_stats lst; | |
636 | ||
637 | printk(KERN_DEBUG "Dumping LEB properties\n"); | |
638 | ubifs_get_lp_stats(c, &lst); | |
639 | dbg_dump_lstats(&lst); | |
640 | ||
641 | for (lnum = c->main_first; lnum < c->leb_cnt; lnum++) { | |
642 | err = ubifs_read_one_lp(c, lnum, &lp); | |
643 | if (err) | |
644 | ubifs_err("cannot read lprops for LEB %d", lnum); | |
645 | ||
646 | dbg_dump_lprop(c, &lp); | |
647 | } | |
648 | } | |
649 | ||
650 | void dbg_dump_leb(const struct ubifs_info *c, int lnum) | |
651 | { | |
652 | struct ubifs_scan_leb *sleb; | |
653 | struct ubifs_scan_node *snod; | |
654 | ||
655 | if (dbg_failure_mode) | |
656 | return; | |
657 | ||
658 | printk(KERN_DEBUG "Dumping LEB %d\n", lnum); | |
659 | ||
660 | sleb = ubifs_scan(c, lnum, 0, c->dbg_buf); | |
661 | if (IS_ERR(sleb)) { | |
662 | ubifs_err("scan error %d", (int)PTR_ERR(sleb)); | |
663 | return; | |
664 | } | |
665 | ||
666 | printk(KERN_DEBUG "LEB %d has %d nodes ending at %d\n", lnum, | |
667 | sleb->nodes_cnt, sleb->endpt); | |
668 | ||
669 | list_for_each_entry(snod, &sleb->nodes, list) { | |
670 | cond_resched(); | |
671 | printk(KERN_DEBUG "Dumping node at LEB %d:%d len %d\n", lnum, | |
672 | snod->offs, snod->len); | |
673 | dbg_dump_node(c, snod->node); | |
674 | } | |
675 | ||
676 | ubifs_scan_destroy(sleb); | |
677 | return; | |
678 | } | |
679 | ||
680 | void dbg_dump_znode(const struct ubifs_info *c, | |
681 | const struct ubifs_znode *znode) | |
682 | { | |
683 | int n; | |
684 | const struct ubifs_zbranch *zbr; | |
685 | ||
686 | spin_lock(&dbg_lock); | |
687 | if (znode->parent) | |
688 | zbr = &znode->parent->zbranch[znode->iip]; | |
689 | else | |
690 | zbr = &c->zroot; | |
691 | ||
692 | printk(KERN_DEBUG "znode %p, LEB %d:%d len %d parent %p iip %d level %d" | |
693 | " child_cnt %d flags %lx\n", znode, zbr->lnum, zbr->offs, | |
694 | zbr->len, znode->parent, znode->iip, znode->level, | |
695 | znode->child_cnt, znode->flags); | |
696 | ||
697 | if (znode->child_cnt <= 0 || znode->child_cnt > c->fanout) { | |
698 | spin_unlock(&dbg_lock); | |
699 | return; | |
700 | } | |
701 | ||
702 | printk(KERN_DEBUG "zbranches:\n"); | |
703 | for (n = 0; n < znode->child_cnt; n++) { | |
704 | zbr = &znode->zbranch[n]; | |
705 | if (znode->level > 0) | |
706 | printk(KERN_DEBUG "\t%d: znode %p LEB %d:%d len %d key " | |
707 | "%s\n", n, zbr->znode, zbr->lnum, | |
708 | zbr->offs, zbr->len, | |
709 | DBGKEY(&zbr->key)); | |
710 | else | |
711 | printk(KERN_DEBUG "\t%d: LNC %p LEB %d:%d len %d key " | |
712 | "%s\n", n, zbr->znode, zbr->lnum, | |
713 | zbr->offs, zbr->len, | |
714 | DBGKEY(&zbr->key)); | |
715 | } | |
716 | spin_unlock(&dbg_lock); | |
717 | } | |
718 | ||
719 | void dbg_dump_heap(struct ubifs_info *c, struct ubifs_lpt_heap *heap, int cat) | |
720 | { | |
721 | int i; | |
722 | ||
723 | printk(KERN_DEBUG "Dumping heap cat %d (%d elements)\n", | |
724 | cat, heap->cnt); | |
725 | for (i = 0; i < heap->cnt; i++) { | |
726 | struct ubifs_lprops *lprops = heap->arr[i]; | |
727 | ||
728 | printk(KERN_DEBUG "\t%d. LEB %d hpos %d free %d dirty %d " | |
729 | "flags %d\n", i, lprops->lnum, lprops->hpos, | |
730 | lprops->free, lprops->dirty, lprops->flags); | |
731 | } | |
732 | } | |
733 | ||
734 | void dbg_dump_pnode(struct ubifs_info *c, struct ubifs_pnode *pnode, | |
735 | struct ubifs_nnode *parent, int iip) | |
736 | { | |
737 | int i; | |
738 | ||
739 | printk(KERN_DEBUG "Dumping pnode:\n"); | |
740 | printk(KERN_DEBUG "\taddress %zx parent %zx cnext %zx\n", | |
741 | (size_t)pnode, (size_t)parent, (size_t)pnode->cnext); | |
742 | printk(KERN_DEBUG "\tflags %lu iip %d level %d num %d\n", | |
743 | pnode->flags, iip, pnode->level, pnode->num); | |
744 | for (i = 0; i < UBIFS_LPT_FANOUT; i++) { | |
745 | struct ubifs_lprops *lp = &pnode->lprops[i]; | |
746 | ||
747 | printk(KERN_DEBUG "\t%d: free %d dirty %d flags %d lnum %d\n", | |
748 | i, lp->free, lp->dirty, lp->flags, lp->lnum); | |
749 | } | |
750 | } | |
751 | ||
752 | void dbg_dump_tnc(struct ubifs_info *c) | |
753 | { | |
754 | struct ubifs_znode *znode; | |
755 | int level; | |
756 | ||
757 | printk(KERN_DEBUG "\n"); | |
758 | printk(KERN_DEBUG "Dumping the TNC tree\n"); | |
759 | znode = ubifs_tnc_levelorder_next(c->zroot.znode, NULL); | |
760 | level = znode->level; | |
761 | printk(KERN_DEBUG "== Level %d ==\n", level); | |
762 | while (znode) { | |
763 | if (level != znode->level) { | |
764 | level = znode->level; | |
765 | printk(KERN_DEBUG "== Level %d ==\n", level); | |
766 | } | |
767 | dbg_dump_znode(c, znode); | |
768 | znode = ubifs_tnc_levelorder_next(c->zroot.znode, znode); | |
769 | } | |
770 | ||
771 | printk(KERN_DEBUG "\n"); | |
772 | } | |
773 | ||
774 | static int dump_znode(struct ubifs_info *c, struct ubifs_znode *znode, | |
775 | void *priv) | |
776 | { | |
777 | dbg_dump_znode(c, znode); | |
778 | return 0; | |
779 | } | |
780 | ||
781 | /** | |
782 | * dbg_dump_index - dump the on-flash index. | |
783 | * @c: UBIFS file-system description object | |
784 | * | |
785 | * This function dumps whole UBIFS indexing B-tree, unlike 'dbg_dump_tnc()' | |
786 | * which dumps only in-memory znodes and does not read znodes which from flash. | |
787 | */ | |
788 | void dbg_dump_index(struct ubifs_info *c) | |
789 | { | |
790 | dbg_walk_index(c, NULL, dump_znode, NULL); | |
791 | } | |
792 | ||
793 | /** | |
794 | * dbg_check_synced_i_size - check synchronized inode size. | |
795 | * @inode: inode to check | |
796 | * | |
797 | * If inode is clean, synchronized inode size has to be equivalent to current | |
798 | * inode size. This function has to be called only for locked inodes (@i_mutex | |
799 | * has to be locked). Returns %0 if synchronized inode size if correct, and | |
800 | * %-EINVAL if not. | |
801 | */ | |
802 | int dbg_check_synced_i_size(struct inode *inode) | |
803 | { | |
804 | int err = 0; | |
805 | struct ubifs_inode *ui = ubifs_inode(inode); | |
806 | ||
807 | if (!(ubifs_chk_flags & UBIFS_CHK_GEN)) | |
808 | return 0; | |
809 | if (!S_ISREG(inode->i_mode)) | |
810 | return 0; | |
811 | ||
812 | mutex_lock(&ui->ui_mutex); | |
813 | spin_lock(&ui->ui_lock); | |
814 | if (ui->ui_size != ui->synced_i_size && !ui->dirty) { | |
815 | ubifs_err("ui_size is %lld, synced_i_size is %lld, but inode " | |
816 | "is clean", ui->ui_size, ui->synced_i_size); | |
817 | ubifs_err("i_ino %lu, i_mode %#x, i_size %lld", inode->i_ino, | |
818 | inode->i_mode, i_size_read(inode)); | |
819 | dbg_dump_stack(); | |
820 | err = -EINVAL; | |
821 | } | |
822 | spin_unlock(&ui->ui_lock); | |
823 | mutex_unlock(&ui->ui_mutex); | |
824 | return err; | |
825 | } | |
826 | ||
827 | /* | |
828 | * dbg_check_dir - check directory inode size and link count. | |
829 | * @c: UBIFS file-system description object | |
830 | * @dir: the directory to calculate size for | |
831 | * @size: the result is returned here | |
832 | * | |
833 | * This function makes sure that directory size and link count are correct. | |
834 | * Returns zero in case of success and a negative error code in case of | |
835 | * failure. | |
836 | * | |
837 | * Note, it is good idea to make sure the @dir->i_mutex is locked before | |
838 | * calling this function. | |
839 | */ | |
840 | int dbg_check_dir_size(struct ubifs_info *c, const struct inode *dir) | |
841 | { | |
842 | unsigned int nlink = 2; | |
843 | union ubifs_key key; | |
844 | struct ubifs_dent_node *dent, *pdent = NULL; | |
845 | struct qstr nm = { .name = NULL }; | |
846 | loff_t size = UBIFS_INO_NODE_SZ; | |
847 | ||
848 | if (!(ubifs_chk_flags & UBIFS_CHK_GEN)) | |
849 | return 0; | |
850 | ||
851 | if (!S_ISDIR(dir->i_mode)) | |
852 | return 0; | |
853 | ||
854 | lowest_dent_key(c, &key, dir->i_ino); | |
855 | while (1) { | |
856 | int err; | |
857 | ||
858 | dent = ubifs_tnc_next_ent(c, &key, &nm); | |
859 | if (IS_ERR(dent)) { | |
860 | err = PTR_ERR(dent); | |
861 | if (err == -ENOENT) | |
862 | break; | |
863 | return err; | |
864 | } | |
865 | ||
866 | nm.name = dent->name; | |
867 | nm.len = le16_to_cpu(dent->nlen); | |
868 | size += CALC_DENT_SIZE(nm.len); | |
869 | if (dent->type == UBIFS_ITYPE_DIR) | |
870 | nlink += 1; | |
871 | kfree(pdent); | |
872 | pdent = dent; | |
873 | key_read(c, &dent->key, &key); | |
874 | } | |
875 | kfree(pdent); | |
876 | ||
877 | if (i_size_read(dir) != size) { | |
878 | ubifs_err("directory inode %lu has size %llu, " | |
879 | "but calculated size is %llu", dir->i_ino, | |
880 | (unsigned long long)i_size_read(dir), | |
881 | (unsigned long long)size); | |
882 | dump_stack(); | |
883 | return -EINVAL; | |
884 | } | |
885 | if (dir->i_nlink != nlink) { | |
886 | ubifs_err("directory inode %lu has nlink %u, but calculated " | |
887 | "nlink is %u", dir->i_ino, dir->i_nlink, nlink); | |
888 | dump_stack(); | |
889 | return -EINVAL; | |
890 | } | |
891 | ||
892 | return 0; | |
893 | } | |
894 | ||
895 | /** | |
896 | * dbg_check_key_order - make sure that colliding keys are properly ordered. | |
897 | * @c: UBIFS file-system description object | |
898 | * @zbr1: first zbranch | |
899 | * @zbr2: following zbranch | |
900 | * | |
901 | * In UBIFS indexing B-tree colliding keys has to be sorted in binary order of | |
902 | * names of the direntries/xentries which are referred by the keys. This | |
903 | * function reads direntries/xentries referred by @zbr1 and @zbr2 and makes | |
904 | * sure the name of direntry/xentry referred by @zbr1 is less than | |
905 | * direntry/xentry referred by @zbr2. Returns zero if this is true, %1 if not, | |
906 | * and a negative error code in case of failure. | |
907 | */ | |
908 | static int dbg_check_key_order(struct ubifs_info *c, struct ubifs_zbranch *zbr1, | |
909 | struct ubifs_zbranch *zbr2) | |
910 | { | |
911 | int err, nlen1, nlen2, cmp; | |
912 | struct ubifs_dent_node *dent1, *dent2; | |
913 | union ubifs_key key; | |
914 | ||
915 | ubifs_assert(!keys_cmp(c, &zbr1->key, &zbr2->key)); | |
916 | dent1 = kmalloc(UBIFS_MAX_DENT_NODE_SZ, GFP_NOFS); | |
917 | if (!dent1) | |
918 | return -ENOMEM; | |
919 | dent2 = kmalloc(UBIFS_MAX_DENT_NODE_SZ, GFP_NOFS); | |
920 | if (!dent2) { | |
921 | err = -ENOMEM; | |
922 | goto out_free; | |
923 | } | |
924 | ||
925 | err = ubifs_tnc_read_node(c, zbr1, dent1); | |
926 | if (err) | |
927 | goto out_free; | |
928 | err = ubifs_validate_entry(c, dent1); | |
929 | if (err) | |
930 | goto out_free; | |
931 | ||
932 | err = ubifs_tnc_read_node(c, zbr2, dent2); | |
933 | if (err) | |
934 | goto out_free; | |
935 | err = ubifs_validate_entry(c, dent2); | |
936 | if (err) | |
937 | goto out_free; | |
938 | ||
939 | /* Make sure node keys are the same as in zbranch */ | |
940 | err = 1; | |
941 | key_read(c, &dent1->key, &key); | |
942 | if (keys_cmp(c, &zbr1->key, &key)) { | |
943 | dbg_err("1st entry at %d:%d has key %s", zbr1->lnum, | |
944 | zbr1->offs, DBGKEY(&key)); | |
945 | dbg_err("but it should have key %s according to tnc", | |
946 | DBGKEY(&zbr1->key)); | |
947 | dbg_dump_node(c, dent1); | |
948 | goto out_free; | |
949 | } | |
950 | ||
951 | key_read(c, &dent2->key, &key); | |
952 | if (keys_cmp(c, &zbr2->key, &key)) { | |
953 | dbg_err("2nd entry at %d:%d has key %s", zbr1->lnum, | |
954 | zbr1->offs, DBGKEY(&key)); | |
955 | dbg_err("but it should have key %s according to tnc", | |
956 | DBGKEY(&zbr2->key)); | |
957 | dbg_dump_node(c, dent2); | |
958 | goto out_free; | |
959 | } | |
960 | ||
961 | nlen1 = le16_to_cpu(dent1->nlen); | |
962 | nlen2 = le16_to_cpu(dent2->nlen); | |
963 | ||
964 | cmp = memcmp(dent1->name, dent2->name, min_t(int, nlen1, nlen2)); | |
965 | if (cmp < 0 || (cmp == 0 && nlen1 < nlen2)) { | |
966 | err = 0; | |
967 | goto out_free; | |
968 | } | |
969 | if (cmp == 0 && nlen1 == nlen2) | |
970 | dbg_err("2 xent/dent nodes with the same name"); | |
971 | else | |
972 | dbg_err("bad order of colliding key %s", | |
973 | DBGKEY(&key)); | |
974 | ||
975 | dbg_msg("first node at %d:%d\n", zbr1->lnum, zbr1->offs); | |
976 | dbg_dump_node(c, dent1); | |
977 | dbg_msg("second node at %d:%d\n", zbr2->lnum, zbr2->offs); | |
978 | dbg_dump_node(c, dent2); | |
979 | ||
980 | out_free: | |
981 | kfree(dent2); | |
982 | kfree(dent1); | |
983 | return err; | |
984 | } | |
985 | ||
986 | /** | |
987 | * dbg_check_znode - check if znode is all right. | |
988 | * @c: UBIFS file-system description object | |
989 | * @zbr: zbranch which points to this znode | |
990 | * | |
991 | * This function makes sure that znode referred to by @zbr is all right. | |
992 | * Returns zero if it is, and %-EINVAL if it is not. | |
993 | */ | |
994 | static int dbg_check_znode(struct ubifs_info *c, struct ubifs_zbranch *zbr) | |
995 | { | |
996 | struct ubifs_znode *znode = zbr->znode; | |
997 | struct ubifs_znode *zp = znode->parent; | |
998 | int n, err, cmp; | |
999 | ||
1000 | if (znode->child_cnt <= 0 || znode->child_cnt > c->fanout) { | |
1001 | err = 1; | |
1002 | goto out; | |
1003 | } | |
1004 | if (znode->level < 0) { | |
1005 | err = 2; | |
1006 | goto out; | |
1007 | } | |
1008 | if (znode->iip < 0 || znode->iip >= c->fanout) { | |
1009 | err = 3; | |
1010 | goto out; | |
1011 | } | |
1012 | ||
1013 | if (zbr->len == 0) | |
1014 | /* Only dirty zbranch may have no on-flash nodes */ | |
1015 | if (!ubifs_zn_dirty(znode)) { | |
1016 | err = 4; | |
1017 | goto out; | |
1018 | } | |
1019 | ||
1020 | if (ubifs_zn_dirty(znode)) { | |
1021 | /* | |
1022 | * If znode is dirty, its parent has to be dirty as well. The | |
1023 | * order of the operation is important, so we have to have | |
1024 | * memory barriers. | |
1025 | */ | |
1026 | smp_mb(); | |
1027 | if (zp && !ubifs_zn_dirty(zp)) { | |
1028 | /* | |
1029 | * The dirty flag is atomic and is cleared outside the | |
1030 | * TNC mutex, so znode's dirty flag may now have | |
1031 | * been cleared. The child is always cleared before the | |
1032 | * parent, so we just need to check again. | |
1033 | */ | |
1034 | smp_mb(); | |
1035 | if (ubifs_zn_dirty(znode)) { | |
1036 | err = 5; | |
1037 | goto out; | |
1038 | } | |
1039 | } | |
1040 | } | |
1041 | ||
1042 | if (zp) { | |
1043 | const union ubifs_key *min, *max; | |
1044 | ||
1045 | if (znode->level != zp->level - 1) { | |
1046 | err = 6; | |
1047 | goto out; | |
1048 | } | |
1049 | ||
1050 | /* Make sure the 'parent' pointer in our znode is correct */ | |
1051 | err = ubifs_search_zbranch(c, zp, &zbr->key, &n); | |
1052 | if (!err) { | |
1053 | /* This zbranch does not exist in the parent */ | |
1054 | err = 7; | |
1055 | goto out; | |
1056 | } | |
1057 | ||
1058 | if (znode->iip >= zp->child_cnt) { | |
1059 | err = 8; | |
1060 | goto out; | |
1061 | } | |
1062 | ||
1063 | if (znode->iip != n) { | |
1064 | /* This may happen only in case of collisions */ | |
1065 | if (keys_cmp(c, &zp->zbranch[n].key, | |
1066 | &zp->zbranch[znode->iip].key)) { | |
1067 | err = 9; | |
1068 | goto out; | |
1069 | } | |
1070 | n = znode->iip; | |
1071 | } | |
1072 | ||
1073 | /* | |
1074 | * Make sure that the first key in our znode is greater than or | |
1075 | * equal to the key in the pointing zbranch. | |
1076 | */ | |
1077 | min = &zbr->key; | |
1078 | cmp = keys_cmp(c, min, &znode->zbranch[0].key); | |
1079 | if (cmp == 1) { | |
1080 | err = 10; | |
1081 | goto out; | |
1082 | } | |
1083 | ||
1084 | if (n + 1 < zp->child_cnt) { | |
1085 | max = &zp->zbranch[n + 1].key; | |
1086 | ||
1087 | /* | |
1088 | * Make sure the last key in our znode is less or | |
1089 | * equivalent than the the key in zbranch which goes | |
1090 | * after our pointing zbranch. | |
1091 | */ | |
1092 | cmp = keys_cmp(c, max, | |
1093 | &znode->zbranch[znode->child_cnt - 1].key); | |
1094 | if (cmp == -1) { | |
1095 | err = 11; | |
1096 | goto out; | |
1097 | } | |
1098 | } | |
1099 | } else { | |
1100 | /* This may only be root znode */ | |
1101 | if (zbr != &c->zroot) { | |
1102 | err = 12; | |
1103 | goto out; | |
1104 | } | |
1105 | } | |
1106 | ||
1107 | /* | |
1108 | * Make sure that next key is greater or equivalent then the previous | |
1109 | * one. | |
1110 | */ | |
1111 | for (n = 1; n < znode->child_cnt; n++) { | |
1112 | cmp = keys_cmp(c, &znode->zbranch[n - 1].key, | |
1113 | &znode->zbranch[n].key); | |
1114 | if (cmp > 0) { | |
1115 | err = 13; | |
1116 | goto out; | |
1117 | } | |
1118 | if (cmp == 0) { | |
1119 | /* This can only be keys with colliding hash */ | |
1120 | if (!is_hash_key(c, &znode->zbranch[n].key)) { | |
1121 | err = 14; | |
1122 | goto out; | |
1123 | } | |
1124 | ||
1125 | if (znode->level != 0 || c->replaying) | |
1126 | continue; | |
1127 | ||
1128 | /* | |
1129 | * Colliding keys should follow binary order of | |
1130 | * corresponding xentry/dentry names. | |
1131 | */ | |
1132 | err = dbg_check_key_order(c, &znode->zbranch[n - 1], | |
1133 | &znode->zbranch[n]); | |
1134 | if (err < 0) | |
1135 | return err; | |
1136 | if (err) { | |
1137 | err = 15; | |
1138 | goto out; | |
1139 | } | |
1140 | } | |
1141 | } | |
1142 | ||
1143 | for (n = 0; n < znode->child_cnt; n++) { | |
1144 | if (!znode->zbranch[n].znode && | |
1145 | (znode->zbranch[n].lnum == 0 || | |
1146 | znode->zbranch[n].len == 0)) { | |
1147 | err = 16; | |
1148 | goto out; | |
1149 | } | |
1150 | ||
1151 | if (znode->zbranch[n].lnum != 0 && | |
1152 | znode->zbranch[n].len == 0) { | |
1153 | err = 17; | |
1154 | goto out; | |
1155 | } | |
1156 | ||
1157 | if (znode->zbranch[n].lnum == 0 && | |
1158 | znode->zbranch[n].len != 0) { | |
1159 | err = 18; | |
1160 | goto out; | |
1161 | } | |
1162 | ||
1163 | if (znode->zbranch[n].lnum == 0 && | |
1164 | znode->zbranch[n].offs != 0) { | |
1165 | err = 19; | |
1166 | goto out; | |
1167 | } | |
1168 | ||
1169 | if (znode->level != 0 && znode->zbranch[n].znode) | |
1170 | if (znode->zbranch[n].znode->parent != znode) { | |
1171 | err = 20; | |
1172 | goto out; | |
1173 | } | |
1174 | } | |
1175 | ||
1176 | return 0; | |
1177 | ||
1178 | out: | |
1179 | ubifs_err("failed, error %d", err); | |
1180 | ubifs_msg("dump of the znode"); | |
1181 | dbg_dump_znode(c, znode); | |
1182 | if (zp) { | |
1183 | ubifs_msg("dump of the parent znode"); | |
1184 | dbg_dump_znode(c, zp); | |
1185 | } | |
1186 | dump_stack(); | |
1187 | return -EINVAL; | |
1188 | } | |
1189 | ||
1190 | /** | |
1191 | * dbg_check_tnc - check TNC tree. | |
1192 | * @c: UBIFS file-system description object | |
1193 | * @extra: do extra checks that are possible at start commit | |
1194 | * | |
1195 | * This function traverses whole TNC tree and checks every znode. Returns zero | |
1196 | * if everything is all right and %-EINVAL if something is wrong with TNC. | |
1197 | */ | |
1198 | int dbg_check_tnc(struct ubifs_info *c, int extra) | |
1199 | { | |
1200 | struct ubifs_znode *znode; | |
1201 | long clean_cnt = 0, dirty_cnt = 0; | |
1202 | int err, last; | |
1203 | ||
1204 | if (!(ubifs_chk_flags & UBIFS_CHK_TNC)) | |
1205 | return 0; | |
1206 | ||
1207 | ubifs_assert(mutex_is_locked(&c->tnc_mutex)); | |
1208 | if (!c->zroot.znode) | |
1209 | return 0; | |
1210 | ||
1211 | znode = ubifs_tnc_postorder_first(c->zroot.znode); | |
1212 | while (1) { | |
1213 | struct ubifs_znode *prev; | |
1214 | struct ubifs_zbranch *zbr; | |
1215 | ||
1216 | if (!znode->parent) | |
1217 | zbr = &c->zroot; | |
1218 | else | |
1219 | zbr = &znode->parent->zbranch[znode->iip]; | |
1220 | ||
1221 | err = dbg_check_znode(c, zbr); | |
1222 | if (err) | |
1223 | return err; | |
1224 | ||
1225 | if (extra) { | |
1226 | if (ubifs_zn_dirty(znode)) | |
1227 | dirty_cnt += 1; | |
1228 | else | |
1229 | clean_cnt += 1; | |
1230 | } | |
1231 | ||
1232 | prev = znode; | |
1233 | znode = ubifs_tnc_postorder_next(znode); | |
1234 | if (!znode) | |
1235 | break; | |
1236 | ||
1237 | /* | |
1238 | * If the last key of this znode is equivalent to the first key | |
1239 | * of the next znode (collision), then check order of the keys. | |
1240 | */ | |
1241 | last = prev->child_cnt - 1; | |
1242 | if (prev->level == 0 && znode->level == 0 && !c->replaying && | |
1243 | !keys_cmp(c, &prev->zbranch[last].key, | |
1244 | &znode->zbranch[0].key)) { | |
1245 | err = dbg_check_key_order(c, &prev->zbranch[last], | |
1246 | &znode->zbranch[0]); | |
1247 | if (err < 0) | |
1248 | return err; | |
1249 | if (err) { | |
1250 | ubifs_msg("first znode"); | |
1251 | dbg_dump_znode(c, prev); | |
1252 | ubifs_msg("second znode"); | |
1253 | dbg_dump_znode(c, znode); | |
1254 | return -EINVAL; | |
1255 | } | |
1256 | } | |
1257 | } | |
1258 | ||
1259 | if (extra) { | |
1260 | if (clean_cnt != atomic_long_read(&c->clean_zn_cnt)) { | |
1261 | ubifs_err("incorrect clean_zn_cnt %ld, calculated %ld", | |
1262 | atomic_long_read(&c->clean_zn_cnt), | |
1263 | clean_cnt); | |
1264 | return -EINVAL; | |
1265 | } | |
1266 | if (dirty_cnt != atomic_long_read(&c->dirty_zn_cnt)) { | |
1267 | ubifs_err("incorrect dirty_zn_cnt %ld, calculated %ld", | |
1268 | atomic_long_read(&c->dirty_zn_cnt), | |
1269 | dirty_cnt); | |
1270 | return -EINVAL; | |
1271 | } | |
1272 | } | |
1273 | ||
1274 | return 0; | |
1275 | } | |
1276 | ||
1277 | /** | |
1278 | * dbg_walk_index - walk the on-flash index. | |
1279 | * @c: UBIFS file-system description object | |
1280 | * @leaf_cb: called for each leaf node | |
1281 | * @znode_cb: called for each indexing node | |
1282 | * @priv: private date which is passed to callbacks | |
1283 | * | |
1284 | * This function walks the UBIFS index and calls the @leaf_cb for each leaf | |
1285 | * node and @znode_cb for each indexing node. Returns zero in case of success | |
1286 | * and a negative error code in case of failure. | |
1287 | * | |
1288 | * It would be better if this function removed every znode it pulled to into | |
1289 | * the TNC, so that the behavior more closely matched the non-debugging | |
1290 | * behavior. | |
1291 | */ | |
1292 | int dbg_walk_index(struct ubifs_info *c, dbg_leaf_callback leaf_cb, | |
1293 | dbg_znode_callback znode_cb, void *priv) | |
1294 | { | |
1295 | int err; | |
1296 | struct ubifs_zbranch *zbr; | |
1297 | struct ubifs_znode *znode, *child; | |
1298 | ||
1299 | mutex_lock(&c->tnc_mutex); | |
1300 | /* If the root indexing node is not in TNC - pull it */ | |
1301 | if (!c->zroot.znode) { | |
1302 | c->zroot.znode = ubifs_load_znode(c, &c->zroot, NULL, 0); | |
1303 | if (IS_ERR(c->zroot.znode)) { | |
1304 | err = PTR_ERR(c->zroot.znode); | |
1305 | c->zroot.znode = NULL; | |
1306 | goto out_unlock; | |
1307 | } | |
1308 | } | |
1309 | ||
1310 | /* | |
1311 | * We are going to traverse the indexing tree in the postorder manner. | |
1312 | * Go down and find the leftmost indexing node where we are going to | |
1313 | * start from. | |
1314 | */ | |
1315 | znode = c->zroot.znode; | |
1316 | while (znode->level > 0) { | |
1317 | zbr = &znode->zbranch[0]; | |
1318 | child = zbr->znode; | |
1319 | if (!child) { | |
1320 | child = ubifs_load_znode(c, zbr, znode, 0); | |
1321 | if (IS_ERR(child)) { | |
1322 | err = PTR_ERR(child); | |
1323 | goto out_unlock; | |
1324 | } | |
1325 | zbr->znode = child; | |
1326 | } | |
1327 | ||
1328 | znode = child; | |
1329 | } | |
1330 | ||
1331 | /* Iterate over all indexing nodes */ | |
1332 | while (1) { | |
1333 | int idx; | |
1334 | ||
1335 | cond_resched(); | |
1336 | ||
1337 | if (znode_cb) { | |
1338 | err = znode_cb(c, znode, priv); | |
1339 | if (err) { | |
1340 | ubifs_err("znode checking function returned " | |
1341 | "error %d", err); | |
1342 | dbg_dump_znode(c, znode); | |
1343 | goto out_dump; | |
1344 | } | |
1345 | } | |
1346 | if (leaf_cb && znode->level == 0) { | |
1347 | for (idx = 0; idx < znode->child_cnt; idx++) { | |
1348 | zbr = &znode->zbranch[idx]; | |
1349 | err = leaf_cb(c, zbr, priv); | |
1350 | if (err) { | |
1351 | ubifs_err("leaf checking function " | |
1352 | "returned error %d, for leaf " | |
1353 | "at LEB %d:%d", | |
1354 | err, zbr->lnum, zbr->offs); | |
1355 | goto out_dump; | |
1356 | } | |
1357 | } | |
1358 | } | |
1359 | ||
1360 | if (!znode->parent) | |
1361 | break; | |
1362 | ||
1363 | idx = znode->iip + 1; | |
1364 | znode = znode->parent; | |
1365 | if (idx < znode->child_cnt) { | |
1366 | /* Switch to the next index in the parent */ | |
1367 | zbr = &znode->zbranch[idx]; | |
1368 | child = zbr->znode; | |
1369 | if (!child) { | |
1370 | child = ubifs_load_znode(c, zbr, znode, idx); | |
1371 | if (IS_ERR(child)) { | |
1372 | err = PTR_ERR(child); | |
1373 | goto out_unlock; | |
1374 | } | |
1375 | zbr->znode = child; | |
1376 | } | |
1377 | znode = child; | |
1378 | } else | |
1379 | /* | |
1380 | * This is the last child, switch to the parent and | |
1381 | * continue. | |
1382 | */ | |
1383 | continue; | |
1384 | ||
1385 | /* Go to the lowest leftmost znode in the new sub-tree */ | |
1386 | while (znode->level > 0) { | |
1387 | zbr = &znode->zbranch[0]; | |
1388 | child = zbr->znode; | |
1389 | if (!child) { | |
1390 | child = ubifs_load_znode(c, zbr, znode, 0); | |
1391 | if (IS_ERR(child)) { | |
1392 | err = PTR_ERR(child); | |
1393 | goto out_unlock; | |
1394 | } | |
1395 | zbr->znode = child; | |
1396 | } | |
1397 | znode = child; | |
1398 | } | |
1399 | } | |
1400 | ||
1401 | mutex_unlock(&c->tnc_mutex); | |
1402 | return 0; | |
1403 | ||
1404 | out_dump: | |
1405 | if (znode->parent) | |
1406 | zbr = &znode->parent->zbranch[znode->iip]; | |
1407 | else | |
1408 | zbr = &c->zroot; | |
1409 | ubifs_msg("dump of znode at LEB %d:%d", zbr->lnum, zbr->offs); | |
1410 | dbg_dump_znode(c, znode); | |
1411 | out_unlock: | |
1412 | mutex_unlock(&c->tnc_mutex); | |
1413 | return err; | |
1414 | } | |
1415 | ||
1416 | /** | |
1417 | * add_size - add znode size to partially calculated index size. | |
1418 | * @c: UBIFS file-system description object | |
1419 | * @znode: znode to add size for | |
1420 | * @priv: partially calculated index size | |
1421 | * | |
1422 | * This is a helper function for 'dbg_check_idx_size()' which is called for | |
1423 | * every indexing node and adds its size to the 'long long' variable pointed to | |
1424 | * by @priv. | |
1425 | */ | |
1426 | static int add_size(struct ubifs_info *c, struct ubifs_znode *znode, void *priv) | |
1427 | { | |
1428 | long long *idx_size = priv; | |
1429 | int add; | |
1430 | ||
1431 | add = ubifs_idx_node_sz(c, znode->child_cnt); | |
1432 | add = ALIGN(add, 8); | |
1433 | *idx_size += add; | |
1434 | return 0; | |
1435 | } | |
1436 | ||
1437 | /** | |
1438 | * dbg_check_idx_size - check index size. | |
1439 | * @c: UBIFS file-system description object | |
1440 | * @idx_size: size to check | |
1441 | * | |
1442 | * This function walks the UBIFS index, calculates its size and checks that the | |
1443 | * size is equivalent to @idx_size. Returns zero in case of success and a | |
1444 | * negative error code in case of failure. | |
1445 | */ | |
1446 | int dbg_check_idx_size(struct ubifs_info *c, long long idx_size) | |
1447 | { | |
1448 | int err; | |
1449 | long long calc = 0; | |
1450 | ||
1451 | if (!(ubifs_chk_flags & UBIFS_CHK_IDX_SZ)) | |
1452 | return 0; | |
1453 | ||
1454 | err = dbg_walk_index(c, NULL, add_size, &calc); | |
1455 | if (err) { | |
1456 | ubifs_err("error %d while walking the index", err); | |
1457 | return err; | |
1458 | } | |
1459 | ||
1460 | if (calc != idx_size) { | |
1461 | ubifs_err("index size check failed: calculated size is %lld, " | |
1462 | "should be %lld", calc, idx_size); | |
1463 | dump_stack(); | |
1464 | return -EINVAL; | |
1465 | } | |
1466 | ||
1467 | return 0; | |
1468 | } | |
1469 | ||
1470 | /** | |
1471 | * struct fsck_inode - information about an inode used when checking the file-system. | |
1472 | * @rb: link in the RB-tree of inodes | |
1473 | * @inum: inode number | |
1474 | * @mode: inode type, permissions, etc | |
1475 | * @nlink: inode link count | |
1476 | * @xattr_cnt: count of extended attributes | |
1477 | * @references: how many directory/xattr entries refer this inode (calculated | |
1478 | * while walking the index) | |
1479 | * @calc_cnt: for directory inode count of child directories | |
1480 | * @size: inode size (read from on-flash inode) | |
1481 | * @xattr_sz: summary size of all extended attributes (read from on-flash | |
1482 | * inode) | |
1483 | * @calc_sz: for directories calculated directory size | |
1484 | * @calc_xcnt: count of extended attributes | |
1485 | * @calc_xsz: calculated summary size of all extended attributes | |
1486 | * @xattr_nms: sum of lengths of all extended attribute names belonging to this | |
1487 | * inode (read from on-flash inode) | |
1488 | * @calc_xnms: calculated sum of lengths of all extended attribute names | |
1489 | */ | |
1490 | struct fsck_inode { | |
1491 | struct rb_node rb; | |
1492 | ino_t inum; | |
1493 | umode_t mode; | |
1494 | unsigned int nlink; | |
1495 | unsigned int xattr_cnt; | |
1496 | int references; | |
1497 | int calc_cnt; | |
1498 | long long size; | |
1499 | unsigned int xattr_sz; | |
1500 | long long calc_sz; | |
1501 | long long calc_xcnt; | |
1502 | long long calc_xsz; | |
1503 | unsigned int xattr_nms; | |
1504 | long long calc_xnms; | |
1505 | }; | |
1506 | ||
1507 | /** | |
1508 | * struct fsck_data - private FS checking information. | |
1509 | * @inodes: RB-tree of all inodes (contains @struct fsck_inode objects) | |
1510 | */ | |
1511 | struct fsck_data { | |
1512 | struct rb_root inodes; | |
1513 | }; | |
1514 | ||
1515 | /** | |
1516 | * add_inode - add inode information to RB-tree of inodes. | |
1517 | * @c: UBIFS file-system description object | |
1518 | * @fsckd: FS checking information | |
1519 | * @ino: raw UBIFS inode to add | |
1520 | * | |
1521 | * This is a helper function for 'check_leaf()' which adds information about | |
1522 | * inode @ino to the RB-tree of inodes. Returns inode information pointer in | |
1523 | * case of success and a negative error code in case of failure. | |
1524 | */ | |
1525 | static struct fsck_inode *add_inode(struct ubifs_info *c, | |
1526 | struct fsck_data *fsckd, | |
1527 | struct ubifs_ino_node *ino) | |
1528 | { | |
1529 | struct rb_node **p, *parent = NULL; | |
1530 | struct fsck_inode *fscki; | |
1531 | ino_t inum = key_inum_flash(c, &ino->key); | |
1532 | ||
1533 | p = &fsckd->inodes.rb_node; | |
1534 | while (*p) { | |
1535 | parent = *p; | |
1536 | fscki = rb_entry(parent, struct fsck_inode, rb); | |
1537 | if (inum < fscki->inum) | |
1538 | p = &(*p)->rb_left; | |
1539 | else if (inum > fscki->inum) | |
1540 | p = &(*p)->rb_right; | |
1541 | else | |
1542 | return fscki; | |
1543 | } | |
1544 | ||
1545 | if (inum > c->highest_inum) { | |
1546 | ubifs_err("too high inode number, max. is %lu", | |
1547 | c->highest_inum); | |
1548 | return ERR_PTR(-EINVAL); | |
1549 | } | |
1550 | ||
1551 | fscki = kzalloc(sizeof(struct fsck_inode), GFP_NOFS); | |
1552 | if (!fscki) | |
1553 | return ERR_PTR(-ENOMEM); | |
1554 | ||
1555 | fscki->inum = inum; | |
1556 | fscki->nlink = le32_to_cpu(ino->nlink); | |
1557 | fscki->size = le64_to_cpu(ino->size); | |
1558 | fscki->xattr_cnt = le32_to_cpu(ino->xattr_cnt); | |
1559 | fscki->xattr_sz = le32_to_cpu(ino->xattr_size); | |
1560 | fscki->xattr_nms = le32_to_cpu(ino->xattr_names); | |
1561 | fscki->mode = le32_to_cpu(ino->mode); | |
1562 | if (S_ISDIR(fscki->mode)) { | |
1563 | fscki->calc_sz = UBIFS_INO_NODE_SZ; | |
1564 | fscki->calc_cnt = 2; | |
1565 | } | |
1566 | rb_link_node(&fscki->rb, parent, p); | |
1567 | rb_insert_color(&fscki->rb, &fsckd->inodes); | |
1568 | return fscki; | |
1569 | } | |
1570 | ||
1571 | /** | |
1572 | * search_inode - search inode in the RB-tree of inodes. | |
1573 | * @fsckd: FS checking information | |
1574 | * @inum: inode number to search | |
1575 | * | |
1576 | * This is a helper function for 'check_leaf()' which searches inode @inum in | |
1577 | * the RB-tree of inodes and returns an inode information pointer or %NULL if | |
1578 | * the inode was not found. | |
1579 | */ | |
1580 | static struct fsck_inode *search_inode(struct fsck_data *fsckd, ino_t inum) | |
1581 | { | |
1582 | struct rb_node *p; | |
1583 | struct fsck_inode *fscki; | |
1584 | ||
1585 | p = fsckd->inodes.rb_node; | |
1586 | while (p) { | |
1587 | fscki = rb_entry(p, struct fsck_inode, rb); | |
1588 | if (inum < fscki->inum) | |
1589 | p = p->rb_left; | |
1590 | else if (inum > fscki->inum) | |
1591 | p = p->rb_right; | |
1592 | else | |
1593 | return fscki; | |
1594 | } | |
1595 | return NULL; | |
1596 | } | |
1597 | ||
1598 | /** | |
1599 | * read_add_inode - read inode node and add it to RB-tree of inodes. | |
1600 | * @c: UBIFS file-system description object | |
1601 | * @fsckd: FS checking information | |
1602 | * @inum: inode number to read | |
1603 | * | |
1604 | * This is a helper function for 'check_leaf()' which finds inode node @inum in | |
1605 | * the index, reads it, and adds it to the RB-tree of inodes. Returns inode | |
1606 | * information pointer in case of success and a negative error code in case of | |
1607 | * failure. | |
1608 | */ | |
1609 | static struct fsck_inode *read_add_inode(struct ubifs_info *c, | |
1610 | struct fsck_data *fsckd, ino_t inum) | |
1611 | { | |
1612 | int n, err; | |
1613 | union ubifs_key key; | |
1614 | struct ubifs_znode *znode; | |
1615 | struct ubifs_zbranch *zbr; | |
1616 | struct ubifs_ino_node *ino; | |
1617 | struct fsck_inode *fscki; | |
1618 | ||
1619 | fscki = search_inode(fsckd, inum); | |
1620 | if (fscki) | |
1621 | return fscki; | |
1622 | ||
1623 | ino_key_init(c, &key, inum); | |
1624 | err = ubifs_lookup_level0(c, &key, &znode, &n); | |
1625 | if (!err) { | |
1626 | ubifs_err("inode %lu not found in index", inum); | |
1627 | return ERR_PTR(-ENOENT); | |
1628 | } else if (err < 0) { | |
1629 | ubifs_err("error %d while looking up inode %lu", err, inum); | |
1630 | return ERR_PTR(err); | |
1631 | } | |
1632 | ||
1633 | zbr = &znode->zbranch[n]; | |
1634 | if (zbr->len < UBIFS_INO_NODE_SZ) { | |
1635 | ubifs_err("bad node %lu node length %d", inum, zbr->len); | |
1636 | return ERR_PTR(-EINVAL); | |
1637 | } | |
1638 | ||
1639 | ino = kmalloc(zbr->len, GFP_NOFS); | |
1640 | if (!ino) | |
1641 | return ERR_PTR(-ENOMEM); | |
1642 | ||
1643 | err = ubifs_tnc_read_node(c, zbr, ino); | |
1644 | if (err) { | |
1645 | ubifs_err("cannot read inode node at LEB %d:%d, error %d", | |
1646 | zbr->lnum, zbr->offs, err); | |
1647 | kfree(ino); | |
1648 | return ERR_PTR(err); | |
1649 | } | |
1650 | ||
1651 | fscki = add_inode(c, fsckd, ino); | |
1652 | kfree(ino); | |
1653 | if (IS_ERR(fscki)) { | |
1654 | ubifs_err("error %ld while adding inode %lu node", | |
1655 | PTR_ERR(fscki), inum); | |
1656 | return fscki; | |
1657 | } | |
1658 | ||
1659 | return fscki; | |
1660 | } | |
1661 | ||
1662 | /** | |
1663 | * check_leaf - check leaf node. | |
1664 | * @c: UBIFS file-system description object | |
1665 | * @zbr: zbranch of the leaf node to check | |
1666 | * @priv: FS checking information | |
1667 | * | |
1668 | * This is a helper function for 'dbg_check_filesystem()' which is called for | |
1669 | * every single leaf node while walking the indexing tree. It checks that the | |
1670 | * leaf node referred from the indexing tree exists, has correct CRC, and does | |
1671 | * some other basic validation. This function is also responsible for building | |
1672 | * an RB-tree of inodes - it adds all inodes into the RB-tree. It also | |
1673 | * calculates reference count, size, etc for each inode in order to later | |
1674 | * compare them to the information stored inside the inodes and detect possible | |
1675 | * inconsistencies. Returns zero in case of success and a negative error code | |
1676 | * in case of failure. | |
1677 | */ | |
1678 | static int check_leaf(struct ubifs_info *c, struct ubifs_zbranch *zbr, | |
1679 | void *priv) | |
1680 | { | |
1681 | ino_t inum; | |
1682 | void *node; | |
1683 | struct ubifs_ch *ch; | |
1684 | int err, type = key_type(c, &zbr->key); | |
1685 | struct fsck_inode *fscki; | |
1686 | ||
1687 | if (zbr->len < UBIFS_CH_SZ) { | |
1688 | ubifs_err("bad leaf length %d (LEB %d:%d)", | |
1689 | zbr->len, zbr->lnum, zbr->offs); | |
1690 | return -EINVAL; | |
1691 | } | |
1692 | ||
1693 | node = kmalloc(zbr->len, GFP_NOFS); | |
1694 | if (!node) | |
1695 | return -ENOMEM; | |
1696 | ||
1697 | err = ubifs_tnc_read_node(c, zbr, node); | |
1698 | if (err) { | |
1699 | ubifs_err("cannot read leaf node at LEB %d:%d, error %d", | |
1700 | zbr->lnum, zbr->offs, err); | |
1701 | goto out_free; | |
1702 | } | |
1703 | ||
1704 | /* If this is an inode node, add it to RB-tree of inodes */ | |
1705 | if (type == UBIFS_INO_KEY) { | |
1706 | fscki = add_inode(c, priv, node); | |
1707 | if (IS_ERR(fscki)) { | |
1708 | err = PTR_ERR(fscki); | |
1709 | ubifs_err("error %d while adding inode node", err); | |
1710 | goto out_dump; | |
1711 | } | |
1712 | goto out; | |
1713 | } | |
1714 | ||
1715 | if (type != UBIFS_DENT_KEY && type != UBIFS_XENT_KEY && | |
1716 | type != UBIFS_DATA_KEY) { | |
1717 | ubifs_err("unexpected node type %d at LEB %d:%d", | |
1718 | type, zbr->lnum, zbr->offs); | |
1719 | err = -EINVAL; | |
1720 | goto out_free; | |
1721 | } | |
1722 | ||
1723 | ch = node; | |
1724 | if (le64_to_cpu(ch->sqnum) > c->max_sqnum) { | |
1725 | ubifs_err("too high sequence number, max. is %llu", | |
1726 | c->max_sqnum); | |
1727 | err = -EINVAL; | |
1728 | goto out_dump; | |
1729 | } | |
1730 | ||
1731 | if (type == UBIFS_DATA_KEY) { | |
1732 | long long blk_offs; | |
1733 | struct ubifs_data_node *dn = node; | |
1734 | ||
1735 | /* | |
1736 | * Search the inode node this data node belongs to and insert | |
1737 | * it to the RB-tree of inodes. | |
1738 | */ | |
1739 | inum = key_inum_flash(c, &dn->key); | |
1740 | fscki = read_add_inode(c, priv, inum); | |
1741 | if (IS_ERR(fscki)) { | |
1742 | err = PTR_ERR(fscki); | |
1743 | ubifs_err("error %d while processing data node and " | |
1744 | "trying to find inode node %lu", err, inum); | |
1745 | goto out_dump; | |
1746 | } | |
1747 | ||
1748 | /* Make sure the data node is within inode size */ | |
1749 | blk_offs = key_block_flash(c, &dn->key); | |
1750 | blk_offs <<= UBIFS_BLOCK_SHIFT; | |
1751 | blk_offs += le32_to_cpu(dn->size); | |
1752 | if (blk_offs > fscki->size) { | |
1753 | ubifs_err("data node at LEB %d:%d is not within inode " | |
1754 | "size %lld", zbr->lnum, zbr->offs, | |
1755 | fscki->size); | |
1756 | err = -EINVAL; | |
1757 | goto out_dump; | |
1758 | } | |
1759 | } else { | |
1760 | int nlen; | |
1761 | struct ubifs_dent_node *dent = node; | |
1762 | struct fsck_inode *fscki1; | |
1763 | ||
1764 | err = ubifs_validate_entry(c, dent); | |
1765 | if (err) | |
1766 | goto out_dump; | |
1767 | ||
1768 | /* | |
1769 | * Search the inode node this entry refers to and the parent | |
1770 | * inode node and insert them to the RB-tree of inodes. | |
1771 | */ | |
1772 | inum = le64_to_cpu(dent->inum); | |
1773 | fscki = read_add_inode(c, priv, inum); | |
1774 | if (IS_ERR(fscki)) { | |
1775 | err = PTR_ERR(fscki); | |
1776 | ubifs_err("error %d while processing entry node and " | |
1777 | "trying to find inode node %lu", err, inum); | |
1778 | goto out_dump; | |
1779 | } | |
1780 | ||
1781 | /* Count how many direntries or xentries refers this inode */ | |
1782 | fscki->references += 1; | |
1783 | ||
1784 | inum = key_inum_flash(c, &dent->key); | |
1785 | fscki1 = read_add_inode(c, priv, inum); | |
1786 | if (IS_ERR(fscki1)) { | |
1787 | err = PTR_ERR(fscki); | |
1788 | ubifs_err("error %d while processing entry node and " | |
1789 | "trying to find parent inode node %lu", | |
1790 | err, inum); | |
1791 | goto out_dump; | |
1792 | } | |
1793 | ||
1794 | nlen = le16_to_cpu(dent->nlen); | |
1795 | if (type == UBIFS_XENT_KEY) { | |
1796 | fscki1->calc_xcnt += 1; | |
1797 | fscki1->calc_xsz += CALC_DENT_SIZE(nlen); | |
1798 | fscki1->calc_xsz += CALC_XATTR_BYTES(fscki->size); | |
1799 | fscki1->calc_xnms += nlen; | |
1800 | } else { | |
1801 | fscki1->calc_sz += CALC_DENT_SIZE(nlen); | |
1802 | if (dent->type == UBIFS_ITYPE_DIR) | |
1803 | fscki1->calc_cnt += 1; | |
1804 | } | |
1805 | } | |
1806 | ||
1807 | out: | |
1808 | kfree(node); | |
1809 | return 0; | |
1810 | ||
1811 | out_dump: | |
1812 | ubifs_msg("dump of node at LEB %d:%d", zbr->lnum, zbr->offs); | |
1813 | dbg_dump_node(c, node); | |
1814 | out_free: | |
1815 | kfree(node); | |
1816 | return err; | |
1817 | } | |
1818 | ||
1819 | /** | |
1820 | * free_inodes - free RB-tree of inodes. | |
1821 | * @fsckd: FS checking information | |
1822 | */ | |
1823 | static void free_inodes(struct fsck_data *fsckd) | |
1824 | { | |
1825 | struct rb_node *this = fsckd->inodes.rb_node; | |
1826 | struct fsck_inode *fscki; | |
1827 | ||
1828 | while (this) { | |
1829 | if (this->rb_left) | |
1830 | this = this->rb_left; | |
1831 | else if (this->rb_right) | |
1832 | this = this->rb_right; | |
1833 | else { | |
1834 | fscki = rb_entry(this, struct fsck_inode, rb); | |
1835 | this = rb_parent(this); | |
1836 | if (this) { | |
1837 | if (this->rb_left == &fscki->rb) | |
1838 | this->rb_left = NULL; | |
1839 | else | |
1840 | this->rb_right = NULL; | |
1841 | } | |
1842 | kfree(fscki); | |
1843 | } | |
1844 | } | |
1845 | } | |
1846 | ||
1847 | /** | |
1848 | * check_inodes - checks all inodes. | |
1849 | * @c: UBIFS file-system description object | |
1850 | * @fsckd: FS checking information | |
1851 | * | |
1852 | * This is a helper function for 'dbg_check_filesystem()' which walks the | |
1853 | * RB-tree of inodes after the index scan has been finished, and checks that | |
1854 | * inode nlink, size, etc are correct. Returns zero if inodes are fine, | |
1855 | * %-EINVAL if not, and a negative error code in case of failure. | |
1856 | */ | |
1857 | static int check_inodes(struct ubifs_info *c, struct fsck_data *fsckd) | |
1858 | { | |
1859 | int n, err; | |
1860 | union ubifs_key key; | |
1861 | struct ubifs_znode *znode; | |
1862 | struct ubifs_zbranch *zbr; | |
1863 | struct ubifs_ino_node *ino; | |
1864 | struct fsck_inode *fscki; | |
1865 | struct rb_node *this = rb_first(&fsckd->inodes); | |
1866 | ||
1867 | while (this) { | |
1868 | fscki = rb_entry(this, struct fsck_inode, rb); | |
1869 | this = rb_next(this); | |
1870 | ||
1871 | if (S_ISDIR(fscki->mode)) { | |
1872 | /* | |
1873 | * Directories have to have exactly one reference (they | |
1874 | * cannot have hardlinks), although root inode is an | |
1875 | * exception. | |
1876 | */ | |
1877 | if (fscki->inum != UBIFS_ROOT_INO && | |
1878 | fscki->references != 1) { | |
1879 | ubifs_err("directory inode %lu has %d " | |
1880 | "direntries which refer it, but " | |
1881 | "should be 1", fscki->inum, | |
1882 | fscki->references); | |
1883 | goto out_dump; | |
1884 | } | |
1885 | if (fscki->inum == UBIFS_ROOT_INO && | |
1886 | fscki->references != 0) { | |
1887 | ubifs_err("root inode %lu has non-zero (%d) " | |
1888 | "direntries which refer it", | |
1889 | fscki->inum, fscki->references); | |
1890 | goto out_dump; | |
1891 | } | |
1892 | if (fscki->calc_sz != fscki->size) { | |
1893 | ubifs_err("directory inode %lu size is %lld, " | |
1894 | "but calculated size is %lld", | |
1895 | fscki->inum, fscki->size, | |
1896 | fscki->calc_sz); | |
1897 | goto out_dump; | |
1898 | } | |
1899 | if (fscki->calc_cnt != fscki->nlink) { | |
1900 | ubifs_err("directory inode %lu nlink is %d, " | |
1901 | "but calculated nlink is %d", | |
1902 | fscki->inum, fscki->nlink, | |
1903 | fscki->calc_cnt); | |
1904 | goto out_dump; | |
1905 | } | |
1906 | } else { | |
1907 | if (fscki->references != fscki->nlink) { | |
1908 | ubifs_err("inode %lu nlink is %d, but " | |
1909 | "calculated nlink is %d", fscki->inum, | |
1910 | fscki->nlink, fscki->references); | |
1911 | goto out_dump; | |
1912 | } | |
1913 | } | |
1914 | if (fscki->xattr_sz != fscki->calc_xsz) { | |
1915 | ubifs_err("inode %lu has xattr size %u, but " | |
1916 | "calculated size is %lld", | |
1917 | fscki->inum, fscki->xattr_sz, | |
1918 | fscki->calc_xsz); | |
1919 | goto out_dump; | |
1920 | } | |
1921 | if (fscki->xattr_cnt != fscki->calc_xcnt) { | |
1922 | ubifs_err("inode %lu has %u xattrs, but " | |
1923 | "calculated count is %lld", fscki->inum, | |
1924 | fscki->xattr_cnt, fscki->calc_xcnt); | |
1925 | goto out_dump; | |
1926 | } | |
1927 | if (fscki->xattr_nms != fscki->calc_xnms) { | |
1928 | ubifs_err("inode %lu has xattr names' size %u, but " | |
1929 | "calculated names' size is %lld", | |
1930 | fscki->inum, fscki->xattr_nms, | |
1931 | fscki->calc_xnms); | |
1932 | goto out_dump; | |
1933 | } | |
1934 | } | |
1935 | ||
1936 | return 0; | |
1937 | ||
1938 | out_dump: | |
1939 | /* Read the bad inode and dump it */ | |
1940 | ino_key_init(c, &key, fscki->inum); | |
1941 | err = ubifs_lookup_level0(c, &key, &znode, &n); | |
1942 | if (!err) { | |
1943 | ubifs_err("inode %lu not found in index", fscki->inum); | |
1944 | return -ENOENT; | |
1945 | } else if (err < 0) { | |
1946 | ubifs_err("error %d while looking up inode %lu", | |
1947 | err, fscki->inum); | |
1948 | return err; | |
1949 | } | |
1950 | ||
1951 | zbr = &znode->zbranch[n]; | |
1952 | ino = kmalloc(zbr->len, GFP_NOFS); | |
1953 | if (!ino) | |
1954 | return -ENOMEM; | |
1955 | ||
1956 | err = ubifs_tnc_read_node(c, zbr, ino); | |
1957 | if (err) { | |
1958 | ubifs_err("cannot read inode node at LEB %d:%d, error %d", | |
1959 | zbr->lnum, zbr->offs, err); | |
1960 | kfree(ino); | |
1961 | return err; | |
1962 | } | |
1963 | ||
1964 | ubifs_msg("dump of the inode %lu sitting in LEB %d:%d", | |
1965 | fscki->inum, zbr->lnum, zbr->offs); | |
1966 | dbg_dump_node(c, ino); | |
1967 | kfree(ino); | |
1968 | return -EINVAL; | |
1969 | } | |
1970 | ||
1971 | /** | |
1972 | * dbg_check_filesystem - check the file-system. | |
1973 | * @c: UBIFS file-system description object | |
1974 | * | |
1975 | * This function checks the file system, namely: | |
1976 | * o makes sure that all leaf nodes exist and their CRCs are correct; | |
1977 | * o makes sure inode nlink, size, xattr size/count are correct (for all | |
1978 | * inodes). | |
1979 | * | |
1980 | * The function reads whole indexing tree and all nodes, so it is pretty | |
1981 | * heavy-weight. Returns zero if the file-system is consistent, %-EINVAL if | |
1982 | * not, and a negative error code in case of failure. | |
1983 | */ | |
1984 | int dbg_check_filesystem(struct ubifs_info *c) | |
1985 | { | |
1986 | int err; | |
1987 | struct fsck_data fsckd; | |
1988 | ||
1989 | if (!(ubifs_chk_flags & UBIFS_CHK_FS)) | |
1990 | return 0; | |
1991 | ||
1992 | fsckd.inodes = RB_ROOT; | |
1993 | err = dbg_walk_index(c, check_leaf, NULL, &fsckd); | |
1994 | if (err) | |
1995 | goto out_free; | |
1996 | ||
1997 | err = check_inodes(c, &fsckd); | |
1998 | if (err) | |
1999 | goto out_free; | |
2000 | ||
2001 | free_inodes(&fsckd); | |
2002 | return 0; | |
2003 | ||
2004 | out_free: | |
2005 | ubifs_err("file-system check failed with error %d", err); | |
2006 | dump_stack(); | |
2007 | free_inodes(&fsckd); | |
2008 | return err; | |
2009 | } | |
2010 | ||
2011 | static int invocation_cnt; | |
2012 | ||
2013 | int dbg_force_in_the_gaps(void) | |
2014 | { | |
2015 | if (!dbg_force_in_the_gaps_enabled) | |
2016 | return 0; | |
2017 | /* Force in-the-gaps every 8th commit */ | |
2018 | return !((invocation_cnt++) & 0x7); | |
2019 | } | |
2020 | ||
2021 | /* Failure mode for recovery testing */ | |
2022 | ||
2023 | #define chance(n, d) (simple_rand() <= (n) * 32768LL / (d)) | |
2024 | ||
2025 | struct failure_mode_info { | |
2026 | struct list_head list; | |
2027 | struct ubifs_info *c; | |
2028 | }; | |
2029 | ||
2030 | static LIST_HEAD(fmi_list); | |
2031 | static DEFINE_SPINLOCK(fmi_lock); | |
2032 | ||
2033 | static unsigned int next; | |
2034 | ||
2035 | static int simple_rand(void) | |
2036 | { | |
2037 | if (next == 0) | |
2038 | next = current->pid; | |
2039 | next = next * 1103515245 + 12345; | |
2040 | return (next >> 16) & 32767; | |
2041 | } | |
2042 | ||
2043 | void dbg_failure_mode_registration(struct ubifs_info *c) | |
2044 | { | |
2045 | struct failure_mode_info *fmi; | |
2046 | ||
2047 | fmi = kmalloc(sizeof(struct failure_mode_info), GFP_NOFS); | |
2048 | if (!fmi) { | |
2049 | dbg_err("Failed to register failure mode - no memory"); | |
2050 | return; | |
2051 | } | |
2052 | fmi->c = c; | |
2053 | spin_lock(&fmi_lock); | |
2054 | list_add_tail(&fmi->list, &fmi_list); | |
2055 | spin_unlock(&fmi_lock); | |
2056 | } | |
2057 | ||
2058 | void dbg_failure_mode_deregistration(struct ubifs_info *c) | |
2059 | { | |
2060 | struct failure_mode_info *fmi, *tmp; | |
2061 | ||
2062 | spin_lock(&fmi_lock); | |
2063 | list_for_each_entry_safe(fmi, tmp, &fmi_list, list) | |
2064 | if (fmi->c == c) { | |
2065 | list_del(&fmi->list); | |
2066 | kfree(fmi); | |
2067 | } | |
2068 | spin_unlock(&fmi_lock); | |
2069 | } | |
2070 | ||
2071 | static struct ubifs_info *dbg_find_info(struct ubi_volume_desc *desc) | |
2072 | { | |
2073 | struct failure_mode_info *fmi; | |
2074 | ||
2075 | spin_lock(&fmi_lock); | |
2076 | list_for_each_entry(fmi, &fmi_list, list) | |
2077 | if (fmi->c->ubi == desc) { | |
2078 | struct ubifs_info *c = fmi->c; | |
2079 | ||
2080 | spin_unlock(&fmi_lock); | |
2081 | return c; | |
2082 | } | |
2083 | spin_unlock(&fmi_lock); | |
2084 | return NULL; | |
2085 | } | |
2086 | ||
2087 | static int in_failure_mode(struct ubi_volume_desc *desc) | |
2088 | { | |
2089 | struct ubifs_info *c = dbg_find_info(desc); | |
2090 | ||
2091 | if (c && dbg_failure_mode) | |
2092 | return c->failure_mode; | |
2093 | return 0; | |
2094 | } | |
2095 | ||
2096 | static int do_fail(struct ubi_volume_desc *desc, int lnum, int write) | |
2097 | { | |
2098 | struct ubifs_info *c = dbg_find_info(desc); | |
2099 | ||
2100 | if (!c || !dbg_failure_mode) | |
2101 | return 0; | |
2102 | if (c->failure_mode) | |
2103 | return 1; | |
2104 | if (!c->fail_cnt) { | |
2105 | /* First call - decide delay to failure */ | |
2106 | if (chance(1, 2)) { | |
2107 | unsigned int delay = 1 << (simple_rand() >> 11); | |
2108 | ||
2109 | if (chance(1, 2)) { | |
2110 | c->fail_delay = 1; | |
2111 | c->fail_timeout = jiffies + | |
2112 | msecs_to_jiffies(delay); | |
2113 | dbg_rcvry("failing after %ums", delay); | |
2114 | } else { | |
2115 | c->fail_delay = 2; | |
2116 | c->fail_cnt_max = delay; | |
2117 | dbg_rcvry("failing after %u calls", delay); | |
2118 | } | |
2119 | } | |
2120 | c->fail_cnt += 1; | |
2121 | } | |
2122 | /* Determine if failure delay has expired */ | |
2123 | if (c->fail_delay == 1) { | |
2124 | if (time_before(jiffies, c->fail_timeout)) | |
2125 | return 0; | |
2126 | } else if (c->fail_delay == 2) | |
2127 | if (c->fail_cnt++ < c->fail_cnt_max) | |
2128 | return 0; | |
2129 | if (lnum == UBIFS_SB_LNUM) { | |
2130 | if (write) { | |
2131 | if (chance(1, 2)) | |
2132 | return 0; | |
2133 | } else if (chance(19, 20)) | |
2134 | return 0; | |
2135 | dbg_rcvry("failing in super block LEB %d", lnum); | |
2136 | } else if (lnum == UBIFS_MST_LNUM || lnum == UBIFS_MST_LNUM + 1) { | |
2137 | if (chance(19, 20)) | |
2138 | return 0; | |
2139 | dbg_rcvry("failing in master LEB %d", lnum); | |
2140 | } else if (lnum >= UBIFS_LOG_LNUM && lnum <= c->log_last) { | |
2141 | if (write) { | |
2142 | if (chance(99, 100)) | |
2143 | return 0; | |
2144 | } else if (chance(399, 400)) | |
2145 | return 0; | |
2146 | dbg_rcvry("failing in log LEB %d", lnum); | |
2147 | } else if (lnum >= c->lpt_first && lnum <= c->lpt_last) { | |
2148 | if (write) { | |
2149 | if (chance(7, 8)) | |
2150 | return 0; | |
2151 | } else if (chance(19, 20)) | |
2152 | return 0; | |
2153 | dbg_rcvry("failing in LPT LEB %d", lnum); | |
2154 | } else if (lnum >= c->orph_first && lnum <= c->orph_last) { | |
2155 | if (write) { | |
2156 | if (chance(1, 2)) | |
2157 | return 0; | |
2158 | } else if (chance(9, 10)) | |
2159 | return 0; | |
2160 | dbg_rcvry("failing in orphan LEB %d", lnum); | |
2161 | } else if (lnum == c->ihead_lnum) { | |
2162 | if (chance(99, 100)) | |
2163 | return 0; | |
2164 | dbg_rcvry("failing in index head LEB %d", lnum); | |
2165 | } else if (c->jheads && lnum == c->jheads[GCHD].wbuf.lnum) { | |
2166 | if (chance(9, 10)) | |
2167 | return 0; | |
2168 | dbg_rcvry("failing in GC head LEB %d", lnum); | |
2169 | } else if (write && !RB_EMPTY_ROOT(&c->buds) && | |
2170 | !ubifs_search_bud(c, lnum)) { | |
2171 | if (chance(19, 20)) | |
2172 | return 0; | |
2173 | dbg_rcvry("failing in non-bud LEB %d", lnum); | |
2174 | } else if (c->cmt_state == COMMIT_RUNNING_BACKGROUND || | |
2175 | c->cmt_state == COMMIT_RUNNING_REQUIRED) { | |
2176 | if (chance(999, 1000)) | |
2177 | return 0; | |
2178 | dbg_rcvry("failing in bud LEB %d commit running", lnum); | |
2179 | } else { | |
2180 | if (chance(9999, 10000)) | |
2181 | return 0; | |
2182 | dbg_rcvry("failing in bud LEB %d commit not running", lnum); | |
2183 | } | |
2184 | ubifs_err("*** SETTING FAILURE MODE ON (LEB %d) ***", lnum); | |
2185 | c->failure_mode = 1; | |
2186 | dump_stack(); | |
2187 | return 1; | |
2188 | } | |
2189 | ||
2190 | static void cut_data(const void *buf, int len) | |
2191 | { | |
2192 | int flen, i; | |
2193 | unsigned char *p = (void *)buf; | |
2194 | ||
2195 | flen = (len * (long long)simple_rand()) >> 15; | |
2196 | for (i = flen; i < len; i++) | |
2197 | p[i] = 0xff; | |
2198 | } | |
2199 | ||
2200 | int dbg_leb_read(struct ubi_volume_desc *desc, int lnum, char *buf, int offset, | |
2201 | int len, int check) | |
2202 | { | |
2203 | if (in_failure_mode(desc)) | |
2204 | return -EIO; | |
2205 | return ubi_leb_read(desc, lnum, buf, offset, len, check); | |
2206 | } | |
2207 | ||
2208 | int dbg_leb_write(struct ubi_volume_desc *desc, int lnum, const void *buf, | |
2209 | int offset, int len, int dtype) | |
2210 | { | |
2211 | int err; | |
2212 | ||
2213 | if (in_failure_mode(desc)) | |
2214 | return -EIO; | |
2215 | if (do_fail(desc, lnum, 1)) | |
2216 | cut_data(buf, len); | |
2217 | err = ubi_leb_write(desc, lnum, buf, offset, len, dtype); | |
2218 | if (err) | |
2219 | return err; | |
2220 | if (in_failure_mode(desc)) | |
2221 | return -EIO; | |
2222 | return 0; | |
2223 | } | |
2224 | ||
2225 | int dbg_leb_change(struct ubi_volume_desc *desc, int lnum, const void *buf, | |
2226 | int len, int dtype) | |
2227 | { | |
2228 | int err; | |
2229 | ||
2230 | if (do_fail(desc, lnum, 1)) | |
2231 | return -EIO; | |
2232 | err = ubi_leb_change(desc, lnum, buf, len, dtype); | |
2233 | if (err) | |
2234 | return err; | |
2235 | if (do_fail(desc, lnum, 1)) | |
2236 | return -EIO; | |
2237 | return 0; | |
2238 | } | |
2239 | ||
2240 | int dbg_leb_erase(struct ubi_volume_desc *desc, int lnum) | |
2241 | { | |
2242 | int err; | |
2243 | ||
2244 | if (do_fail(desc, lnum, 0)) | |
2245 | return -EIO; | |
2246 | err = ubi_leb_erase(desc, lnum); | |
2247 | if (err) | |
2248 | return err; | |
2249 | if (do_fail(desc, lnum, 0)) | |
2250 | return -EIO; | |
2251 | return 0; | |
2252 | } | |
2253 | ||
2254 | int dbg_leb_unmap(struct ubi_volume_desc *desc, int lnum) | |
2255 | { | |
2256 | int err; | |
2257 | ||
2258 | if (do_fail(desc, lnum, 0)) | |
2259 | return -EIO; | |
2260 | err = ubi_leb_unmap(desc, lnum); | |
2261 | if (err) | |
2262 | return err; | |
2263 | if (do_fail(desc, lnum, 0)) | |
2264 | return -EIO; | |
2265 | return 0; | |
2266 | } | |
2267 | ||
2268 | int dbg_is_mapped(struct ubi_volume_desc *desc, int lnum) | |
2269 | { | |
2270 | if (in_failure_mode(desc)) | |
2271 | return -EIO; | |
2272 | return ubi_is_mapped(desc, lnum); | |
2273 | } | |
2274 | ||
2275 | int dbg_leb_map(struct ubi_volume_desc *desc, int lnum, int dtype) | |
2276 | { | |
2277 | int err; | |
2278 | ||
2279 | if (do_fail(desc, lnum, 0)) | |
2280 | return -EIO; | |
2281 | err = ubi_leb_map(desc, lnum, dtype); | |
2282 | if (err) | |
2283 | return err; | |
2284 | if (do_fail(desc, lnum, 0)) | |
2285 | return -EIO; | |
2286 | return 0; | |
2287 | } | |
2288 | ||
2289 | #endif /* CONFIG_UBIFS_FS_DEBUG */ |