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1e51764a AB |
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> | |
552ff317 | 35 | #include <linux/debugfs.h> |
4d61db4f | 36 | #include <linux/math64.h> |
1e51764a AB |
37 | |
38 | #ifdef CONFIG_UBIFS_FS_DEBUG | |
39 | ||
40 | DEFINE_SPINLOCK(dbg_lock); | |
41 | ||
42 | static char dbg_key_buf0[128]; | |
43 | static char dbg_key_buf1[128]; | |
44 | ||
45 | unsigned int ubifs_msg_flags = UBIFS_MSG_FLAGS_DEFAULT; | |
46 | unsigned int ubifs_chk_flags = UBIFS_CHK_FLAGS_DEFAULT; | |
47 | unsigned int ubifs_tst_flags; | |
48 | ||
49 | module_param_named(debug_msgs, ubifs_msg_flags, uint, S_IRUGO | S_IWUSR); | |
50 | module_param_named(debug_chks, ubifs_chk_flags, uint, S_IRUGO | S_IWUSR); | |
51 | module_param_named(debug_tsts, ubifs_tst_flags, uint, S_IRUGO | S_IWUSR); | |
52 | ||
53 | MODULE_PARM_DESC(debug_msgs, "Debug message type flags"); | |
54 | MODULE_PARM_DESC(debug_chks, "Debug check flags"); | |
55 | MODULE_PARM_DESC(debug_tsts, "Debug special test flags"); | |
56 | ||
57 | static const char *get_key_fmt(int fmt) | |
58 | { | |
59 | switch (fmt) { | |
60 | case UBIFS_SIMPLE_KEY_FMT: | |
61 | return "simple"; | |
62 | default: | |
63 | return "unknown/invalid format"; | |
64 | } | |
65 | } | |
66 | ||
67 | static const char *get_key_hash(int hash) | |
68 | { | |
69 | switch (hash) { | |
70 | case UBIFS_KEY_HASH_R5: | |
71 | return "R5"; | |
72 | case UBIFS_KEY_HASH_TEST: | |
73 | return "test"; | |
74 | default: | |
75 | return "unknown/invalid name hash"; | |
76 | } | |
77 | } | |
78 | ||
79 | static const char *get_key_type(int type) | |
80 | { | |
81 | switch (type) { | |
82 | case UBIFS_INO_KEY: | |
83 | return "inode"; | |
84 | case UBIFS_DENT_KEY: | |
85 | return "direntry"; | |
86 | case UBIFS_XENT_KEY: | |
87 | return "xentry"; | |
88 | case UBIFS_DATA_KEY: | |
89 | return "data"; | |
90 | case UBIFS_TRUN_KEY: | |
91 | return "truncate"; | |
92 | default: | |
93 | return "unknown/invalid key"; | |
94 | } | |
95 | } | |
96 | ||
97 | static void sprintf_key(const struct ubifs_info *c, const union ubifs_key *key, | |
98 | char *buffer) | |
99 | { | |
100 | char *p = buffer; | |
101 | int type = key_type(c, key); | |
102 | ||
103 | if (c->key_fmt == UBIFS_SIMPLE_KEY_FMT) { | |
104 | switch (type) { | |
105 | case UBIFS_INO_KEY: | |
e84461ad | 106 | sprintf(p, "(%lu, %s)", (unsigned long)key_inum(c, key), |
1e51764a AB |
107 | get_key_type(type)); |
108 | break; | |
109 | case UBIFS_DENT_KEY: | |
110 | case UBIFS_XENT_KEY: | |
e84461ad AB |
111 | sprintf(p, "(%lu, %s, %#08x)", |
112 | (unsigned long)key_inum(c, key), | |
1e51764a AB |
113 | get_key_type(type), key_hash(c, key)); |
114 | break; | |
115 | case UBIFS_DATA_KEY: | |
e84461ad AB |
116 | sprintf(p, "(%lu, %s, %u)", |
117 | (unsigned long)key_inum(c, key), | |
1e51764a AB |
118 | get_key_type(type), key_block(c, key)); |
119 | break; | |
120 | case UBIFS_TRUN_KEY: | |
121 | sprintf(p, "(%lu, %s)", | |
e84461ad AB |
122 | (unsigned long)key_inum(c, key), |
123 | get_key_type(type)); | |
1e51764a AB |
124 | break; |
125 | default: | |
126 | sprintf(p, "(bad key type: %#08x, %#08x)", | |
127 | key->u32[0], key->u32[1]); | |
128 | } | |
129 | } else | |
130 | sprintf(p, "bad key format %d", c->key_fmt); | |
131 | } | |
132 | ||
133 | const char *dbg_key_str0(const struct ubifs_info *c, const union ubifs_key *key) | |
134 | { | |
135 | /* dbg_lock must be held */ | |
136 | sprintf_key(c, key, dbg_key_buf0); | |
137 | return dbg_key_buf0; | |
138 | } | |
139 | ||
140 | const char *dbg_key_str1(const struct ubifs_info *c, const union ubifs_key *key) | |
141 | { | |
142 | /* dbg_lock must be held */ | |
143 | sprintf_key(c, key, dbg_key_buf1); | |
144 | return dbg_key_buf1; | |
145 | } | |
146 | ||
147 | const char *dbg_ntype(int type) | |
148 | { | |
149 | switch (type) { | |
150 | case UBIFS_PAD_NODE: | |
151 | return "padding node"; | |
152 | case UBIFS_SB_NODE: | |
153 | return "superblock node"; | |
154 | case UBIFS_MST_NODE: | |
155 | return "master node"; | |
156 | case UBIFS_REF_NODE: | |
157 | return "reference node"; | |
158 | case UBIFS_INO_NODE: | |
159 | return "inode node"; | |
160 | case UBIFS_DENT_NODE: | |
161 | return "direntry node"; | |
162 | case UBIFS_XENT_NODE: | |
163 | return "xentry node"; | |
164 | case UBIFS_DATA_NODE: | |
165 | return "data node"; | |
166 | case UBIFS_TRUN_NODE: | |
167 | return "truncate node"; | |
168 | case UBIFS_IDX_NODE: | |
169 | return "indexing node"; | |
170 | case UBIFS_CS_NODE: | |
171 | return "commit start node"; | |
172 | case UBIFS_ORPH_NODE: | |
173 | return "orphan node"; | |
174 | default: | |
175 | return "unknown node"; | |
176 | } | |
177 | } | |
178 | ||
179 | static const char *dbg_gtype(int type) | |
180 | { | |
181 | switch (type) { | |
182 | case UBIFS_NO_NODE_GROUP: | |
183 | return "no node group"; | |
184 | case UBIFS_IN_NODE_GROUP: | |
185 | return "in node group"; | |
186 | case UBIFS_LAST_OF_NODE_GROUP: | |
187 | return "last of node group"; | |
188 | default: | |
189 | return "unknown"; | |
190 | } | |
191 | } | |
192 | ||
193 | const char *dbg_cstate(int cmt_state) | |
194 | { | |
195 | switch (cmt_state) { | |
196 | case COMMIT_RESTING: | |
197 | return "commit resting"; | |
198 | case COMMIT_BACKGROUND: | |
199 | return "background commit requested"; | |
200 | case COMMIT_REQUIRED: | |
201 | return "commit required"; | |
202 | case COMMIT_RUNNING_BACKGROUND: | |
203 | return "BACKGROUND commit running"; | |
204 | case COMMIT_RUNNING_REQUIRED: | |
205 | return "commit running and required"; | |
206 | case COMMIT_BROKEN: | |
207 | return "broken commit"; | |
208 | default: | |
209 | return "unknown commit state"; | |
210 | } | |
211 | } | |
212 | ||
213 | static void dump_ch(const struct ubifs_ch *ch) | |
214 | { | |
215 | printk(KERN_DEBUG "\tmagic %#x\n", le32_to_cpu(ch->magic)); | |
216 | printk(KERN_DEBUG "\tcrc %#x\n", le32_to_cpu(ch->crc)); | |
217 | printk(KERN_DEBUG "\tnode_type %d (%s)\n", ch->node_type, | |
218 | dbg_ntype(ch->node_type)); | |
219 | printk(KERN_DEBUG "\tgroup_type %d (%s)\n", ch->group_type, | |
220 | dbg_gtype(ch->group_type)); | |
221 | printk(KERN_DEBUG "\tsqnum %llu\n", | |
222 | (unsigned long long)le64_to_cpu(ch->sqnum)); | |
223 | printk(KERN_DEBUG "\tlen %u\n", le32_to_cpu(ch->len)); | |
224 | } | |
225 | ||
226 | void dbg_dump_inode(const struct ubifs_info *c, const struct inode *inode) | |
227 | { | |
228 | const struct ubifs_inode *ui = ubifs_inode(inode); | |
229 | ||
b5e426e9 AB |
230 | printk(KERN_DEBUG "Dump in-memory inode:"); |
231 | printk(KERN_DEBUG "\tinode %lu\n", inode->i_ino); | |
232 | printk(KERN_DEBUG "\tsize %llu\n", | |
1e51764a | 233 | (unsigned long long)i_size_read(inode)); |
b5e426e9 AB |
234 | printk(KERN_DEBUG "\tnlink %u\n", inode->i_nlink); |
235 | printk(KERN_DEBUG "\tuid %u\n", (unsigned int)inode->i_uid); | |
236 | printk(KERN_DEBUG "\tgid %u\n", (unsigned int)inode->i_gid); | |
237 | printk(KERN_DEBUG "\tatime %u.%u\n", | |
1e51764a AB |
238 | (unsigned int)inode->i_atime.tv_sec, |
239 | (unsigned int)inode->i_atime.tv_nsec); | |
b5e426e9 | 240 | printk(KERN_DEBUG "\tmtime %u.%u\n", |
1e51764a AB |
241 | (unsigned int)inode->i_mtime.tv_sec, |
242 | (unsigned int)inode->i_mtime.tv_nsec); | |
b5e426e9 | 243 | printk(KERN_DEBUG "\tctime %u.%u\n", |
1e51764a AB |
244 | (unsigned int)inode->i_ctime.tv_sec, |
245 | (unsigned int)inode->i_ctime.tv_nsec); | |
b5e426e9 AB |
246 | printk(KERN_DEBUG "\tcreat_sqnum %llu\n", ui->creat_sqnum); |
247 | printk(KERN_DEBUG "\txattr_size %u\n", ui->xattr_size); | |
248 | printk(KERN_DEBUG "\txattr_cnt %u\n", ui->xattr_cnt); | |
249 | printk(KERN_DEBUG "\txattr_names %u\n", ui->xattr_names); | |
250 | printk(KERN_DEBUG "\tdirty %u\n", ui->dirty); | |
251 | printk(KERN_DEBUG "\txattr %u\n", ui->xattr); | |
252 | printk(KERN_DEBUG "\tbulk_read %u\n", ui->xattr); | |
253 | printk(KERN_DEBUG "\tsynced_i_size %llu\n", | |
254 | (unsigned long long)ui->synced_i_size); | |
255 | printk(KERN_DEBUG "\tui_size %llu\n", | |
256 | (unsigned long long)ui->ui_size); | |
257 | printk(KERN_DEBUG "\tflags %d\n", ui->flags); | |
258 | printk(KERN_DEBUG "\tcompr_type %d\n", ui->compr_type); | |
259 | printk(KERN_DEBUG "\tlast_page_read %lu\n", ui->last_page_read); | |
260 | printk(KERN_DEBUG "\tread_in_a_row %lu\n", ui->read_in_a_row); | |
261 | printk(KERN_DEBUG "\tdata_len %d\n", ui->data_len); | |
1e51764a AB |
262 | } |
263 | ||
264 | void dbg_dump_node(const struct ubifs_info *c, const void *node) | |
265 | { | |
266 | int i, n; | |
267 | union ubifs_key key; | |
268 | const struct ubifs_ch *ch = node; | |
269 | ||
270 | if (dbg_failure_mode) | |
271 | return; | |
272 | ||
273 | /* If the magic is incorrect, just hexdump the first bytes */ | |
274 | if (le32_to_cpu(ch->magic) != UBIFS_NODE_MAGIC) { | |
275 | printk(KERN_DEBUG "Not a node, first %zu bytes:", UBIFS_CH_SZ); | |
276 | print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 32, 1, | |
277 | (void *)node, UBIFS_CH_SZ, 1); | |
278 | return; | |
279 | } | |
280 | ||
281 | spin_lock(&dbg_lock); | |
282 | dump_ch(node); | |
283 | ||
284 | switch (ch->node_type) { | |
285 | case UBIFS_PAD_NODE: | |
286 | { | |
287 | const struct ubifs_pad_node *pad = node; | |
288 | ||
289 | printk(KERN_DEBUG "\tpad_len %u\n", | |
290 | le32_to_cpu(pad->pad_len)); | |
291 | break; | |
292 | } | |
293 | case UBIFS_SB_NODE: | |
294 | { | |
295 | const struct ubifs_sb_node *sup = node; | |
296 | unsigned int sup_flags = le32_to_cpu(sup->flags); | |
297 | ||
298 | printk(KERN_DEBUG "\tkey_hash %d (%s)\n", | |
299 | (int)sup->key_hash, get_key_hash(sup->key_hash)); | |
300 | printk(KERN_DEBUG "\tkey_fmt %d (%s)\n", | |
301 | (int)sup->key_fmt, get_key_fmt(sup->key_fmt)); | |
302 | printk(KERN_DEBUG "\tflags %#x\n", sup_flags); | |
303 | printk(KERN_DEBUG "\t big_lpt %u\n", | |
304 | !!(sup_flags & UBIFS_FLG_BIGLPT)); | |
305 | printk(KERN_DEBUG "\tmin_io_size %u\n", | |
306 | le32_to_cpu(sup->min_io_size)); | |
307 | printk(KERN_DEBUG "\tleb_size %u\n", | |
308 | le32_to_cpu(sup->leb_size)); | |
309 | printk(KERN_DEBUG "\tleb_cnt %u\n", | |
310 | le32_to_cpu(sup->leb_cnt)); | |
311 | printk(KERN_DEBUG "\tmax_leb_cnt %u\n", | |
312 | le32_to_cpu(sup->max_leb_cnt)); | |
313 | printk(KERN_DEBUG "\tmax_bud_bytes %llu\n", | |
314 | (unsigned long long)le64_to_cpu(sup->max_bud_bytes)); | |
315 | printk(KERN_DEBUG "\tlog_lebs %u\n", | |
316 | le32_to_cpu(sup->log_lebs)); | |
317 | printk(KERN_DEBUG "\tlpt_lebs %u\n", | |
318 | le32_to_cpu(sup->lpt_lebs)); | |
319 | printk(KERN_DEBUG "\torph_lebs %u\n", | |
320 | le32_to_cpu(sup->orph_lebs)); | |
321 | printk(KERN_DEBUG "\tjhead_cnt %u\n", | |
322 | le32_to_cpu(sup->jhead_cnt)); | |
323 | printk(KERN_DEBUG "\tfanout %u\n", | |
324 | le32_to_cpu(sup->fanout)); | |
325 | printk(KERN_DEBUG "\tlsave_cnt %u\n", | |
326 | le32_to_cpu(sup->lsave_cnt)); | |
327 | printk(KERN_DEBUG "\tdefault_compr %u\n", | |
328 | (int)le16_to_cpu(sup->default_compr)); | |
329 | printk(KERN_DEBUG "\trp_size %llu\n", | |
330 | (unsigned long long)le64_to_cpu(sup->rp_size)); | |
331 | printk(KERN_DEBUG "\trp_uid %u\n", | |
332 | le32_to_cpu(sup->rp_uid)); | |
333 | printk(KERN_DEBUG "\trp_gid %u\n", | |
334 | le32_to_cpu(sup->rp_gid)); | |
335 | printk(KERN_DEBUG "\tfmt_version %u\n", | |
336 | le32_to_cpu(sup->fmt_version)); | |
337 | printk(KERN_DEBUG "\ttime_gran %u\n", | |
338 | le32_to_cpu(sup->time_gran)); | |
339 | printk(KERN_DEBUG "\tUUID %02X%02X%02X%02X-%02X%02X" | |
340 | "-%02X%02X-%02X%02X-%02X%02X%02X%02X%02X%02X\n", | |
341 | sup->uuid[0], sup->uuid[1], sup->uuid[2], sup->uuid[3], | |
342 | sup->uuid[4], sup->uuid[5], sup->uuid[6], sup->uuid[7], | |
343 | sup->uuid[8], sup->uuid[9], sup->uuid[10], sup->uuid[11], | |
344 | sup->uuid[12], sup->uuid[13], sup->uuid[14], | |
345 | sup->uuid[15]); | |
346 | break; | |
347 | } | |
348 | case UBIFS_MST_NODE: | |
349 | { | |
350 | const struct ubifs_mst_node *mst = node; | |
351 | ||
352 | printk(KERN_DEBUG "\thighest_inum %llu\n", | |
353 | (unsigned long long)le64_to_cpu(mst->highest_inum)); | |
354 | printk(KERN_DEBUG "\tcommit number %llu\n", | |
355 | (unsigned long long)le64_to_cpu(mst->cmt_no)); | |
356 | printk(KERN_DEBUG "\tflags %#x\n", | |
357 | le32_to_cpu(mst->flags)); | |
358 | printk(KERN_DEBUG "\tlog_lnum %u\n", | |
359 | le32_to_cpu(mst->log_lnum)); | |
360 | printk(KERN_DEBUG "\troot_lnum %u\n", | |
361 | le32_to_cpu(mst->root_lnum)); | |
362 | printk(KERN_DEBUG "\troot_offs %u\n", | |
363 | le32_to_cpu(mst->root_offs)); | |
364 | printk(KERN_DEBUG "\troot_len %u\n", | |
365 | le32_to_cpu(mst->root_len)); | |
366 | printk(KERN_DEBUG "\tgc_lnum %u\n", | |
367 | le32_to_cpu(mst->gc_lnum)); | |
368 | printk(KERN_DEBUG "\tihead_lnum %u\n", | |
369 | le32_to_cpu(mst->ihead_lnum)); | |
370 | printk(KERN_DEBUG "\tihead_offs %u\n", | |
371 | le32_to_cpu(mst->ihead_offs)); | |
0ecb9529 HH |
372 | printk(KERN_DEBUG "\tindex_size %llu\n", |
373 | (unsigned long long)le64_to_cpu(mst->index_size)); | |
1e51764a AB |
374 | printk(KERN_DEBUG "\tlpt_lnum %u\n", |
375 | le32_to_cpu(mst->lpt_lnum)); | |
376 | printk(KERN_DEBUG "\tlpt_offs %u\n", | |
377 | le32_to_cpu(mst->lpt_offs)); | |
378 | printk(KERN_DEBUG "\tnhead_lnum %u\n", | |
379 | le32_to_cpu(mst->nhead_lnum)); | |
380 | printk(KERN_DEBUG "\tnhead_offs %u\n", | |
381 | le32_to_cpu(mst->nhead_offs)); | |
382 | printk(KERN_DEBUG "\tltab_lnum %u\n", | |
383 | le32_to_cpu(mst->ltab_lnum)); | |
384 | printk(KERN_DEBUG "\tltab_offs %u\n", | |
385 | le32_to_cpu(mst->ltab_offs)); | |
386 | printk(KERN_DEBUG "\tlsave_lnum %u\n", | |
387 | le32_to_cpu(mst->lsave_lnum)); | |
388 | printk(KERN_DEBUG "\tlsave_offs %u\n", | |
389 | le32_to_cpu(mst->lsave_offs)); | |
390 | printk(KERN_DEBUG "\tlscan_lnum %u\n", | |
391 | le32_to_cpu(mst->lscan_lnum)); | |
392 | printk(KERN_DEBUG "\tleb_cnt %u\n", | |
393 | le32_to_cpu(mst->leb_cnt)); | |
394 | printk(KERN_DEBUG "\tempty_lebs %u\n", | |
395 | le32_to_cpu(mst->empty_lebs)); | |
396 | printk(KERN_DEBUG "\tidx_lebs %u\n", | |
397 | le32_to_cpu(mst->idx_lebs)); | |
398 | printk(KERN_DEBUG "\ttotal_free %llu\n", | |
399 | (unsigned long long)le64_to_cpu(mst->total_free)); | |
400 | printk(KERN_DEBUG "\ttotal_dirty %llu\n", | |
401 | (unsigned long long)le64_to_cpu(mst->total_dirty)); | |
402 | printk(KERN_DEBUG "\ttotal_used %llu\n", | |
403 | (unsigned long long)le64_to_cpu(mst->total_used)); | |
404 | printk(KERN_DEBUG "\ttotal_dead %llu\n", | |
405 | (unsigned long long)le64_to_cpu(mst->total_dead)); | |
406 | printk(KERN_DEBUG "\ttotal_dark %llu\n", | |
407 | (unsigned long long)le64_to_cpu(mst->total_dark)); | |
408 | break; | |
409 | } | |
410 | case UBIFS_REF_NODE: | |
411 | { | |
412 | const struct ubifs_ref_node *ref = node; | |
413 | ||
414 | printk(KERN_DEBUG "\tlnum %u\n", | |
415 | le32_to_cpu(ref->lnum)); | |
416 | printk(KERN_DEBUG "\toffs %u\n", | |
417 | le32_to_cpu(ref->offs)); | |
418 | printk(KERN_DEBUG "\tjhead %u\n", | |
419 | le32_to_cpu(ref->jhead)); | |
420 | break; | |
421 | } | |
422 | case UBIFS_INO_NODE: | |
423 | { | |
424 | const struct ubifs_ino_node *ino = node; | |
425 | ||
426 | key_read(c, &ino->key, &key); | |
427 | printk(KERN_DEBUG "\tkey %s\n", DBGKEY(&key)); | |
428 | printk(KERN_DEBUG "\tcreat_sqnum %llu\n", | |
429 | (unsigned long long)le64_to_cpu(ino->creat_sqnum)); | |
430 | printk(KERN_DEBUG "\tsize %llu\n", | |
431 | (unsigned long long)le64_to_cpu(ino->size)); | |
432 | printk(KERN_DEBUG "\tnlink %u\n", | |
433 | le32_to_cpu(ino->nlink)); | |
434 | printk(KERN_DEBUG "\tatime %lld.%u\n", | |
435 | (long long)le64_to_cpu(ino->atime_sec), | |
436 | le32_to_cpu(ino->atime_nsec)); | |
437 | printk(KERN_DEBUG "\tmtime %lld.%u\n", | |
438 | (long long)le64_to_cpu(ino->mtime_sec), | |
439 | le32_to_cpu(ino->mtime_nsec)); | |
440 | printk(KERN_DEBUG "\tctime %lld.%u\n", | |
441 | (long long)le64_to_cpu(ino->ctime_sec), | |
442 | le32_to_cpu(ino->ctime_nsec)); | |
443 | printk(KERN_DEBUG "\tuid %u\n", | |
444 | le32_to_cpu(ino->uid)); | |
445 | printk(KERN_DEBUG "\tgid %u\n", | |
446 | le32_to_cpu(ino->gid)); | |
447 | printk(KERN_DEBUG "\tmode %u\n", | |
448 | le32_to_cpu(ino->mode)); | |
449 | printk(KERN_DEBUG "\tflags %#x\n", | |
450 | le32_to_cpu(ino->flags)); | |
451 | printk(KERN_DEBUG "\txattr_cnt %u\n", | |
452 | le32_to_cpu(ino->xattr_cnt)); | |
453 | printk(KERN_DEBUG "\txattr_size %u\n", | |
454 | le32_to_cpu(ino->xattr_size)); | |
455 | printk(KERN_DEBUG "\txattr_names %u\n", | |
456 | le32_to_cpu(ino->xattr_names)); | |
457 | printk(KERN_DEBUG "\tcompr_type %#x\n", | |
458 | (int)le16_to_cpu(ino->compr_type)); | |
459 | printk(KERN_DEBUG "\tdata len %u\n", | |
460 | le32_to_cpu(ino->data_len)); | |
461 | break; | |
462 | } | |
463 | case UBIFS_DENT_NODE: | |
464 | case UBIFS_XENT_NODE: | |
465 | { | |
466 | const struct ubifs_dent_node *dent = node; | |
467 | int nlen = le16_to_cpu(dent->nlen); | |
468 | ||
469 | key_read(c, &dent->key, &key); | |
470 | printk(KERN_DEBUG "\tkey %s\n", DBGKEY(&key)); | |
471 | printk(KERN_DEBUG "\tinum %llu\n", | |
472 | (unsigned long long)le64_to_cpu(dent->inum)); | |
473 | printk(KERN_DEBUG "\ttype %d\n", (int)dent->type); | |
474 | printk(KERN_DEBUG "\tnlen %d\n", nlen); | |
475 | printk(KERN_DEBUG "\tname "); | |
476 | ||
477 | if (nlen > UBIFS_MAX_NLEN) | |
478 | printk(KERN_DEBUG "(bad name length, not printing, " | |
479 | "bad or corrupted node)"); | |
480 | else { | |
481 | for (i = 0; i < nlen && dent->name[i]; i++) | |
482 | printk("%c", dent->name[i]); | |
483 | } | |
484 | printk("\n"); | |
485 | ||
486 | break; | |
487 | } | |
488 | case UBIFS_DATA_NODE: | |
489 | { | |
490 | const struct ubifs_data_node *dn = node; | |
491 | int dlen = le32_to_cpu(ch->len) - UBIFS_DATA_NODE_SZ; | |
492 | ||
493 | key_read(c, &dn->key, &key); | |
494 | printk(KERN_DEBUG "\tkey %s\n", DBGKEY(&key)); | |
495 | printk(KERN_DEBUG "\tsize %u\n", | |
496 | le32_to_cpu(dn->size)); | |
497 | printk(KERN_DEBUG "\tcompr_typ %d\n", | |
498 | (int)le16_to_cpu(dn->compr_type)); | |
499 | printk(KERN_DEBUG "\tdata size %d\n", | |
500 | dlen); | |
501 | printk(KERN_DEBUG "\tdata:\n"); | |
502 | print_hex_dump(KERN_DEBUG, "\t", DUMP_PREFIX_OFFSET, 32, 1, | |
503 | (void *)&dn->data, dlen, 0); | |
504 | break; | |
505 | } | |
506 | case UBIFS_TRUN_NODE: | |
507 | { | |
508 | const struct ubifs_trun_node *trun = node; | |
509 | ||
510 | printk(KERN_DEBUG "\tinum %u\n", | |
511 | le32_to_cpu(trun->inum)); | |
512 | printk(KERN_DEBUG "\told_size %llu\n", | |
513 | (unsigned long long)le64_to_cpu(trun->old_size)); | |
514 | printk(KERN_DEBUG "\tnew_size %llu\n", | |
515 | (unsigned long long)le64_to_cpu(trun->new_size)); | |
516 | break; | |
517 | } | |
518 | case UBIFS_IDX_NODE: | |
519 | { | |
520 | const struct ubifs_idx_node *idx = node; | |
521 | ||
522 | n = le16_to_cpu(idx->child_cnt); | |
523 | printk(KERN_DEBUG "\tchild_cnt %d\n", n); | |
524 | printk(KERN_DEBUG "\tlevel %d\n", | |
525 | (int)le16_to_cpu(idx->level)); | |
526 | printk(KERN_DEBUG "\tBranches:\n"); | |
527 | ||
528 | for (i = 0; i < n && i < c->fanout - 1; i++) { | |
529 | const struct ubifs_branch *br; | |
530 | ||
531 | br = ubifs_idx_branch(c, idx, i); | |
532 | key_read(c, &br->key, &key); | |
533 | printk(KERN_DEBUG "\t%d: LEB %d:%d len %d key %s\n", | |
534 | i, le32_to_cpu(br->lnum), le32_to_cpu(br->offs), | |
535 | le32_to_cpu(br->len), DBGKEY(&key)); | |
536 | } | |
537 | break; | |
538 | } | |
539 | case UBIFS_CS_NODE: | |
540 | break; | |
541 | case UBIFS_ORPH_NODE: | |
542 | { | |
543 | const struct ubifs_orph_node *orph = node; | |
544 | ||
545 | printk(KERN_DEBUG "\tcommit number %llu\n", | |
546 | (unsigned long long) | |
547 | le64_to_cpu(orph->cmt_no) & LLONG_MAX); | |
548 | printk(KERN_DEBUG "\tlast node flag %llu\n", | |
549 | (unsigned long long)(le64_to_cpu(orph->cmt_no)) >> 63); | |
550 | n = (le32_to_cpu(ch->len) - UBIFS_ORPH_NODE_SZ) >> 3; | |
551 | printk(KERN_DEBUG "\t%d orphan inode numbers:\n", n); | |
552 | for (i = 0; i < n; i++) | |
553 | printk(KERN_DEBUG "\t ino %llu\n", | |
7424bac8 | 554 | (unsigned long long)le64_to_cpu(orph->inos[i])); |
1e51764a AB |
555 | break; |
556 | } | |
557 | default: | |
558 | printk(KERN_DEBUG "node type %d was not recognized\n", | |
559 | (int)ch->node_type); | |
560 | } | |
561 | spin_unlock(&dbg_lock); | |
562 | } | |
563 | ||
564 | void dbg_dump_budget_req(const struct ubifs_budget_req *req) | |
565 | { | |
566 | spin_lock(&dbg_lock); | |
567 | printk(KERN_DEBUG "Budgeting request: new_ino %d, dirtied_ino %d\n", | |
568 | req->new_ino, req->dirtied_ino); | |
569 | printk(KERN_DEBUG "\tnew_ino_d %d, dirtied_ino_d %d\n", | |
570 | req->new_ino_d, req->dirtied_ino_d); | |
571 | printk(KERN_DEBUG "\tnew_page %d, dirtied_page %d\n", | |
572 | req->new_page, req->dirtied_page); | |
573 | printk(KERN_DEBUG "\tnew_dent %d, mod_dent %d\n", | |
574 | req->new_dent, req->mod_dent); | |
575 | printk(KERN_DEBUG "\tidx_growth %d\n", req->idx_growth); | |
576 | printk(KERN_DEBUG "\tdata_growth %d dd_growth %d\n", | |
577 | req->data_growth, req->dd_growth); | |
578 | spin_unlock(&dbg_lock); | |
579 | } | |
580 | ||
581 | void dbg_dump_lstats(const struct ubifs_lp_stats *lst) | |
582 | { | |
583 | spin_lock(&dbg_lock); | |
1de94159 AB |
584 | printk(KERN_DEBUG "(pid %d) Lprops statistics: empty_lebs %d, " |
585 | "idx_lebs %d\n", current->pid, lst->empty_lebs, lst->idx_lebs); | |
1e51764a AB |
586 | printk(KERN_DEBUG "\ttaken_empty_lebs %d, total_free %lld, " |
587 | "total_dirty %lld\n", lst->taken_empty_lebs, lst->total_free, | |
588 | lst->total_dirty); | |
589 | printk(KERN_DEBUG "\ttotal_used %lld, total_dark %lld, " | |
590 | "total_dead %lld\n", lst->total_used, lst->total_dark, | |
591 | lst->total_dead); | |
592 | spin_unlock(&dbg_lock); | |
593 | } | |
594 | ||
595 | void dbg_dump_budg(struct ubifs_info *c) | |
596 | { | |
597 | int i; | |
598 | struct rb_node *rb; | |
599 | struct ubifs_bud *bud; | |
600 | struct ubifs_gced_idx_leb *idx_gc; | |
21a60258 | 601 | long long available, outstanding, free; |
1e51764a | 602 | |
21a60258 | 603 | ubifs_assert(spin_is_locked(&c->space_lock)); |
1e51764a | 604 | spin_lock(&dbg_lock); |
1de94159 AB |
605 | printk(KERN_DEBUG "(pid %d) Budgeting info: budg_data_growth %lld, " |
606 | "budg_dd_growth %lld, budg_idx_growth %lld\n", current->pid, | |
1e51764a AB |
607 | c->budg_data_growth, c->budg_dd_growth, c->budg_idx_growth); |
608 | printk(KERN_DEBUG "\tdata budget sum %lld, total budget sum %lld, " | |
609 | "freeable_cnt %d\n", c->budg_data_growth + c->budg_dd_growth, | |
610 | c->budg_data_growth + c->budg_dd_growth + c->budg_idx_growth, | |
611 | c->freeable_cnt); | |
612 | printk(KERN_DEBUG "\tmin_idx_lebs %d, old_idx_sz %lld, " | |
613 | "calc_idx_sz %lld, idx_gc_cnt %d\n", c->min_idx_lebs, | |
614 | c->old_idx_sz, c->calc_idx_sz, c->idx_gc_cnt); | |
615 | printk(KERN_DEBUG "\tdirty_pg_cnt %ld, dirty_zn_cnt %ld, " | |
616 | "clean_zn_cnt %ld\n", atomic_long_read(&c->dirty_pg_cnt), | |
617 | atomic_long_read(&c->dirty_zn_cnt), | |
618 | atomic_long_read(&c->clean_zn_cnt)); | |
619 | printk(KERN_DEBUG "\tdark_wm %d, dead_wm %d, max_idx_node_sz %d\n", | |
620 | c->dark_wm, c->dead_wm, c->max_idx_node_sz); | |
621 | printk(KERN_DEBUG "\tgc_lnum %d, ihead_lnum %d\n", | |
622 | c->gc_lnum, c->ihead_lnum); | |
623 | for (i = 0; i < c->jhead_cnt; i++) | |
624 | printk(KERN_DEBUG "\tjhead %d\t LEB %d\n", | |
625 | c->jheads[i].wbuf.jhead, c->jheads[i].wbuf.lnum); | |
626 | for (rb = rb_first(&c->buds); rb; rb = rb_next(rb)) { | |
627 | bud = rb_entry(rb, struct ubifs_bud, rb); | |
628 | printk(KERN_DEBUG "\tbud LEB %d\n", bud->lnum); | |
629 | } | |
630 | list_for_each_entry(bud, &c->old_buds, list) | |
631 | printk(KERN_DEBUG "\told bud LEB %d\n", bud->lnum); | |
632 | list_for_each_entry(idx_gc, &c->idx_gc, list) | |
633 | printk(KERN_DEBUG "\tGC'ed idx LEB %d unmap %d\n", | |
634 | idx_gc->lnum, idx_gc->unmap); | |
635 | printk(KERN_DEBUG "\tcommit state %d\n", c->cmt_state); | |
21a60258 AB |
636 | |
637 | /* Print budgeting predictions */ | |
638 | available = ubifs_calc_available(c, c->min_idx_lebs); | |
639 | outstanding = c->budg_data_growth + c->budg_dd_growth; | |
640 | if (available > outstanding) | |
641 | free = ubifs_reported_space(c, available - outstanding); | |
642 | else | |
643 | free = 0; | |
644 | printk(KERN_DEBUG "Budgeting predictions:\n"); | |
645 | printk(KERN_DEBUG "\tavailable: %lld, outstanding %lld, free %lld\n", | |
646 | available, outstanding, free); | |
1e51764a AB |
647 | spin_unlock(&dbg_lock); |
648 | } | |
649 | ||
650 | void dbg_dump_lprop(const struct ubifs_info *c, const struct ubifs_lprops *lp) | |
651 | { | |
652 | printk(KERN_DEBUG "LEB %d lprops: free %d, dirty %d (used %d), " | |
653 | "flags %#x\n", lp->lnum, lp->free, lp->dirty, | |
654 | c->leb_size - lp->free - lp->dirty, lp->flags); | |
655 | } | |
656 | ||
657 | void dbg_dump_lprops(struct ubifs_info *c) | |
658 | { | |
659 | int lnum, err; | |
660 | struct ubifs_lprops lp; | |
661 | struct ubifs_lp_stats lst; | |
662 | ||
2ba5f7ae AB |
663 | printk(KERN_DEBUG "(pid %d) start dumping LEB properties\n", |
664 | current->pid); | |
1e51764a AB |
665 | ubifs_get_lp_stats(c, &lst); |
666 | dbg_dump_lstats(&lst); | |
667 | ||
668 | for (lnum = c->main_first; lnum < c->leb_cnt; lnum++) { | |
669 | err = ubifs_read_one_lp(c, lnum, &lp); | |
670 | if (err) | |
671 | ubifs_err("cannot read lprops for LEB %d", lnum); | |
672 | ||
673 | dbg_dump_lprop(c, &lp); | |
674 | } | |
2ba5f7ae AB |
675 | printk(KERN_DEBUG "(pid %d) finish dumping LEB properties\n", |
676 | current->pid); | |
1e51764a AB |
677 | } |
678 | ||
73944a6d AH |
679 | void dbg_dump_lpt_info(struct ubifs_info *c) |
680 | { | |
681 | int i; | |
682 | ||
683 | spin_lock(&dbg_lock); | |
2ba5f7ae | 684 | printk(KERN_DEBUG "(pid %d) dumping LPT information\n", current->pid); |
73944a6d AH |
685 | printk(KERN_DEBUG "\tlpt_sz: %lld\n", c->lpt_sz); |
686 | printk(KERN_DEBUG "\tpnode_sz: %d\n", c->pnode_sz); | |
687 | printk(KERN_DEBUG "\tnnode_sz: %d\n", c->nnode_sz); | |
688 | printk(KERN_DEBUG "\tltab_sz: %d\n", c->ltab_sz); | |
689 | printk(KERN_DEBUG "\tlsave_sz: %d\n", c->lsave_sz); | |
690 | printk(KERN_DEBUG "\tbig_lpt: %d\n", c->big_lpt); | |
691 | printk(KERN_DEBUG "\tlpt_hght: %d\n", c->lpt_hght); | |
692 | printk(KERN_DEBUG "\tpnode_cnt: %d\n", c->pnode_cnt); | |
693 | printk(KERN_DEBUG "\tnnode_cnt: %d\n", c->nnode_cnt); | |
694 | printk(KERN_DEBUG "\tdirty_pn_cnt: %d\n", c->dirty_pn_cnt); | |
695 | printk(KERN_DEBUG "\tdirty_nn_cnt: %d\n", c->dirty_nn_cnt); | |
696 | printk(KERN_DEBUG "\tlsave_cnt: %d\n", c->lsave_cnt); | |
697 | printk(KERN_DEBUG "\tspace_bits: %d\n", c->space_bits); | |
698 | printk(KERN_DEBUG "\tlpt_lnum_bits: %d\n", c->lpt_lnum_bits); | |
699 | printk(KERN_DEBUG "\tlpt_offs_bits: %d\n", c->lpt_offs_bits); | |
700 | printk(KERN_DEBUG "\tlpt_spc_bits: %d\n", c->lpt_spc_bits); | |
701 | printk(KERN_DEBUG "\tpcnt_bits: %d\n", c->pcnt_bits); | |
702 | printk(KERN_DEBUG "\tlnum_bits: %d\n", c->lnum_bits); | |
703 | printk(KERN_DEBUG "\tLPT root is at %d:%d\n", c->lpt_lnum, c->lpt_offs); | |
704 | printk(KERN_DEBUG "\tLPT head is at %d:%d\n", | |
705 | c->nhead_lnum, c->nhead_offs); | |
706 | printk(KERN_DEBUG "\tLPT ltab is at %d:%d\n", c->ltab_lnum, c->ltab_offs); | |
707 | if (c->big_lpt) | |
708 | printk(KERN_DEBUG "\tLPT lsave is at %d:%d\n", | |
709 | c->lsave_lnum, c->lsave_offs); | |
710 | for (i = 0; i < c->lpt_lebs; i++) | |
711 | printk(KERN_DEBUG "\tLPT LEB %d free %d dirty %d tgc %d " | |
712 | "cmt %d\n", i + c->lpt_first, c->ltab[i].free, | |
713 | c->ltab[i].dirty, c->ltab[i].tgc, c->ltab[i].cmt); | |
714 | spin_unlock(&dbg_lock); | |
715 | } | |
716 | ||
1e51764a AB |
717 | void dbg_dump_leb(const struct ubifs_info *c, int lnum) |
718 | { | |
719 | struct ubifs_scan_leb *sleb; | |
720 | struct ubifs_scan_node *snod; | |
721 | ||
722 | if (dbg_failure_mode) | |
723 | return; | |
724 | ||
2ba5f7ae AB |
725 | printk(KERN_DEBUG "(pid %d) start dumping LEB %d\n", |
726 | current->pid, lnum); | |
17c2f9f8 | 727 | sleb = ubifs_scan(c, lnum, 0, c->dbg->buf); |
1e51764a AB |
728 | if (IS_ERR(sleb)) { |
729 | ubifs_err("scan error %d", (int)PTR_ERR(sleb)); | |
730 | return; | |
731 | } | |
732 | ||
733 | printk(KERN_DEBUG "LEB %d has %d nodes ending at %d\n", lnum, | |
734 | sleb->nodes_cnt, sleb->endpt); | |
735 | ||
736 | list_for_each_entry(snod, &sleb->nodes, list) { | |
737 | cond_resched(); | |
738 | printk(KERN_DEBUG "Dumping node at LEB %d:%d len %d\n", lnum, | |
739 | snod->offs, snod->len); | |
740 | dbg_dump_node(c, snod->node); | |
741 | } | |
742 | ||
2ba5f7ae AB |
743 | printk(KERN_DEBUG "(pid %d) finish dumping LEB %d\n", |
744 | current->pid, lnum); | |
1e51764a AB |
745 | ubifs_scan_destroy(sleb); |
746 | return; | |
747 | } | |
748 | ||
749 | void dbg_dump_znode(const struct ubifs_info *c, | |
750 | const struct ubifs_znode *znode) | |
751 | { | |
752 | int n; | |
753 | const struct ubifs_zbranch *zbr; | |
754 | ||
755 | spin_lock(&dbg_lock); | |
756 | if (znode->parent) | |
757 | zbr = &znode->parent->zbranch[znode->iip]; | |
758 | else | |
759 | zbr = &c->zroot; | |
760 | ||
761 | printk(KERN_DEBUG "znode %p, LEB %d:%d len %d parent %p iip %d level %d" | |
762 | " child_cnt %d flags %lx\n", znode, zbr->lnum, zbr->offs, | |
763 | zbr->len, znode->parent, znode->iip, znode->level, | |
764 | znode->child_cnt, znode->flags); | |
765 | ||
766 | if (znode->child_cnt <= 0 || znode->child_cnt > c->fanout) { | |
767 | spin_unlock(&dbg_lock); | |
768 | return; | |
769 | } | |
770 | ||
771 | printk(KERN_DEBUG "zbranches:\n"); | |
772 | for (n = 0; n < znode->child_cnt; n++) { | |
773 | zbr = &znode->zbranch[n]; | |
774 | if (znode->level > 0) | |
775 | printk(KERN_DEBUG "\t%d: znode %p LEB %d:%d len %d key " | |
776 | "%s\n", n, zbr->znode, zbr->lnum, | |
777 | zbr->offs, zbr->len, | |
778 | DBGKEY(&zbr->key)); | |
779 | else | |
780 | printk(KERN_DEBUG "\t%d: LNC %p LEB %d:%d len %d key " | |
781 | "%s\n", n, zbr->znode, zbr->lnum, | |
782 | zbr->offs, zbr->len, | |
783 | DBGKEY(&zbr->key)); | |
784 | } | |
785 | spin_unlock(&dbg_lock); | |
786 | } | |
787 | ||
788 | void dbg_dump_heap(struct ubifs_info *c, struct ubifs_lpt_heap *heap, int cat) | |
789 | { | |
790 | int i; | |
791 | ||
2ba5f7ae | 792 | printk(KERN_DEBUG "(pid %d) start dumping heap cat %d (%d elements)\n", |
1de94159 | 793 | current->pid, cat, heap->cnt); |
1e51764a AB |
794 | for (i = 0; i < heap->cnt; i++) { |
795 | struct ubifs_lprops *lprops = heap->arr[i]; | |
796 | ||
797 | printk(KERN_DEBUG "\t%d. LEB %d hpos %d free %d dirty %d " | |
798 | "flags %d\n", i, lprops->lnum, lprops->hpos, | |
799 | lprops->free, lprops->dirty, lprops->flags); | |
800 | } | |
2ba5f7ae | 801 | printk(KERN_DEBUG "(pid %d) finish dumping heap\n", current->pid); |
1e51764a AB |
802 | } |
803 | ||
804 | void dbg_dump_pnode(struct ubifs_info *c, struct ubifs_pnode *pnode, | |
805 | struct ubifs_nnode *parent, int iip) | |
806 | { | |
807 | int i; | |
808 | ||
2ba5f7ae | 809 | printk(KERN_DEBUG "(pid %d) dumping pnode:\n", current->pid); |
1e51764a AB |
810 | printk(KERN_DEBUG "\taddress %zx parent %zx cnext %zx\n", |
811 | (size_t)pnode, (size_t)parent, (size_t)pnode->cnext); | |
812 | printk(KERN_DEBUG "\tflags %lu iip %d level %d num %d\n", | |
813 | pnode->flags, iip, pnode->level, pnode->num); | |
814 | for (i = 0; i < UBIFS_LPT_FANOUT; i++) { | |
815 | struct ubifs_lprops *lp = &pnode->lprops[i]; | |
816 | ||
817 | printk(KERN_DEBUG "\t%d: free %d dirty %d flags %d lnum %d\n", | |
818 | i, lp->free, lp->dirty, lp->flags, lp->lnum); | |
819 | } | |
820 | } | |
821 | ||
822 | void dbg_dump_tnc(struct ubifs_info *c) | |
823 | { | |
824 | struct ubifs_znode *znode; | |
825 | int level; | |
826 | ||
827 | printk(KERN_DEBUG "\n"); | |
2ba5f7ae | 828 | printk(KERN_DEBUG "(pid %d) start dumping TNC tree\n", current->pid); |
1e51764a AB |
829 | znode = ubifs_tnc_levelorder_next(c->zroot.znode, NULL); |
830 | level = znode->level; | |
831 | printk(KERN_DEBUG "== Level %d ==\n", level); | |
832 | while (znode) { | |
833 | if (level != znode->level) { | |
834 | level = znode->level; | |
835 | printk(KERN_DEBUG "== Level %d ==\n", level); | |
836 | } | |
837 | dbg_dump_znode(c, znode); | |
838 | znode = ubifs_tnc_levelorder_next(c->zroot.znode, znode); | |
839 | } | |
2ba5f7ae | 840 | printk(KERN_DEBUG "(pid %d) finish dumping TNC tree\n", current->pid); |
1e51764a AB |
841 | } |
842 | ||
843 | static int dump_znode(struct ubifs_info *c, struct ubifs_znode *znode, | |
844 | void *priv) | |
845 | { | |
846 | dbg_dump_znode(c, znode); | |
847 | return 0; | |
848 | } | |
849 | ||
850 | /** | |
851 | * dbg_dump_index - dump the on-flash index. | |
852 | * @c: UBIFS file-system description object | |
853 | * | |
854 | * This function dumps whole UBIFS indexing B-tree, unlike 'dbg_dump_tnc()' | |
855 | * which dumps only in-memory znodes and does not read znodes which from flash. | |
856 | */ | |
857 | void dbg_dump_index(struct ubifs_info *c) | |
858 | { | |
859 | dbg_walk_index(c, NULL, dump_znode, NULL); | |
860 | } | |
861 | ||
862 | /** | |
863 | * dbg_check_synced_i_size - check synchronized inode size. | |
864 | * @inode: inode to check | |
865 | * | |
866 | * If inode is clean, synchronized inode size has to be equivalent to current | |
867 | * inode size. This function has to be called only for locked inodes (@i_mutex | |
868 | * has to be locked). Returns %0 if synchronized inode size if correct, and | |
869 | * %-EINVAL if not. | |
870 | */ | |
871 | int dbg_check_synced_i_size(struct inode *inode) | |
872 | { | |
873 | int err = 0; | |
874 | struct ubifs_inode *ui = ubifs_inode(inode); | |
875 | ||
876 | if (!(ubifs_chk_flags & UBIFS_CHK_GEN)) | |
877 | return 0; | |
878 | if (!S_ISREG(inode->i_mode)) | |
879 | return 0; | |
880 | ||
881 | mutex_lock(&ui->ui_mutex); | |
882 | spin_lock(&ui->ui_lock); | |
883 | if (ui->ui_size != ui->synced_i_size && !ui->dirty) { | |
884 | ubifs_err("ui_size is %lld, synced_i_size is %lld, but inode " | |
885 | "is clean", ui->ui_size, ui->synced_i_size); | |
886 | ubifs_err("i_ino %lu, i_mode %#x, i_size %lld", inode->i_ino, | |
887 | inode->i_mode, i_size_read(inode)); | |
888 | dbg_dump_stack(); | |
889 | err = -EINVAL; | |
890 | } | |
891 | spin_unlock(&ui->ui_lock); | |
892 | mutex_unlock(&ui->ui_mutex); | |
893 | return err; | |
894 | } | |
895 | ||
896 | /* | |
897 | * dbg_check_dir - check directory inode size and link count. | |
898 | * @c: UBIFS file-system description object | |
899 | * @dir: the directory to calculate size for | |
900 | * @size: the result is returned here | |
901 | * | |
902 | * This function makes sure that directory size and link count are correct. | |
903 | * Returns zero in case of success and a negative error code in case of | |
904 | * failure. | |
905 | * | |
906 | * Note, it is good idea to make sure the @dir->i_mutex is locked before | |
907 | * calling this function. | |
908 | */ | |
909 | int dbg_check_dir_size(struct ubifs_info *c, const struct inode *dir) | |
910 | { | |
911 | unsigned int nlink = 2; | |
912 | union ubifs_key key; | |
913 | struct ubifs_dent_node *dent, *pdent = NULL; | |
914 | struct qstr nm = { .name = NULL }; | |
915 | loff_t size = UBIFS_INO_NODE_SZ; | |
916 | ||
917 | if (!(ubifs_chk_flags & UBIFS_CHK_GEN)) | |
918 | return 0; | |
919 | ||
920 | if (!S_ISDIR(dir->i_mode)) | |
921 | return 0; | |
922 | ||
923 | lowest_dent_key(c, &key, dir->i_ino); | |
924 | while (1) { | |
925 | int err; | |
926 | ||
927 | dent = ubifs_tnc_next_ent(c, &key, &nm); | |
928 | if (IS_ERR(dent)) { | |
929 | err = PTR_ERR(dent); | |
930 | if (err == -ENOENT) | |
931 | break; | |
932 | return err; | |
933 | } | |
934 | ||
935 | nm.name = dent->name; | |
936 | nm.len = le16_to_cpu(dent->nlen); | |
937 | size += CALC_DENT_SIZE(nm.len); | |
938 | if (dent->type == UBIFS_ITYPE_DIR) | |
939 | nlink += 1; | |
940 | kfree(pdent); | |
941 | pdent = dent; | |
942 | key_read(c, &dent->key, &key); | |
943 | } | |
944 | kfree(pdent); | |
945 | ||
946 | if (i_size_read(dir) != size) { | |
947 | ubifs_err("directory inode %lu has size %llu, " | |
948 | "but calculated size is %llu", dir->i_ino, | |
949 | (unsigned long long)i_size_read(dir), | |
950 | (unsigned long long)size); | |
951 | dump_stack(); | |
952 | return -EINVAL; | |
953 | } | |
954 | if (dir->i_nlink != nlink) { | |
955 | ubifs_err("directory inode %lu has nlink %u, but calculated " | |
956 | "nlink is %u", dir->i_ino, dir->i_nlink, nlink); | |
957 | dump_stack(); | |
958 | return -EINVAL; | |
959 | } | |
960 | ||
961 | return 0; | |
962 | } | |
963 | ||
964 | /** | |
965 | * dbg_check_key_order - make sure that colliding keys are properly ordered. | |
966 | * @c: UBIFS file-system description object | |
967 | * @zbr1: first zbranch | |
968 | * @zbr2: following zbranch | |
969 | * | |
970 | * In UBIFS indexing B-tree colliding keys has to be sorted in binary order of | |
971 | * names of the direntries/xentries which are referred by the keys. This | |
972 | * function reads direntries/xentries referred by @zbr1 and @zbr2 and makes | |
973 | * sure the name of direntry/xentry referred by @zbr1 is less than | |
974 | * direntry/xentry referred by @zbr2. Returns zero if this is true, %1 if not, | |
975 | * and a negative error code in case of failure. | |
976 | */ | |
977 | static int dbg_check_key_order(struct ubifs_info *c, struct ubifs_zbranch *zbr1, | |
978 | struct ubifs_zbranch *zbr2) | |
979 | { | |
980 | int err, nlen1, nlen2, cmp; | |
981 | struct ubifs_dent_node *dent1, *dent2; | |
982 | union ubifs_key key; | |
983 | ||
984 | ubifs_assert(!keys_cmp(c, &zbr1->key, &zbr2->key)); | |
985 | dent1 = kmalloc(UBIFS_MAX_DENT_NODE_SZ, GFP_NOFS); | |
986 | if (!dent1) | |
987 | return -ENOMEM; | |
988 | dent2 = kmalloc(UBIFS_MAX_DENT_NODE_SZ, GFP_NOFS); | |
989 | if (!dent2) { | |
990 | err = -ENOMEM; | |
991 | goto out_free; | |
992 | } | |
993 | ||
994 | err = ubifs_tnc_read_node(c, zbr1, dent1); | |
995 | if (err) | |
996 | goto out_free; | |
997 | err = ubifs_validate_entry(c, dent1); | |
998 | if (err) | |
999 | goto out_free; | |
1000 | ||
1001 | err = ubifs_tnc_read_node(c, zbr2, dent2); | |
1002 | if (err) | |
1003 | goto out_free; | |
1004 | err = ubifs_validate_entry(c, dent2); | |
1005 | if (err) | |
1006 | goto out_free; | |
1007 | ||
1008 | /* Make sure node keys are the same as in zbranch */ | |
1009 | err = 1; | |
1010 | key_read(c, &dent1->key, &key); | |
1011 | if (keys_cmp(c, &zbr1->key, &key)) { | |
552ff317 AB |
1012 | ubifs_err("1st entry at %d:%d has key %s", zbr1->lnum, |
1013 | zbr1->offs, DBGKEY(&key)); | |
1014 | ubifs_err("but it should have key %s according to tnc", | |
2ba5f7ae AB |
1015 | DBGKEY(&zbr1->key)); |
1016 | dbg_dump_node(c, dent1); | |
552ff317 | 1017 | goto out_free; |
1e51764a AB |
1018 | } |
1019 | ||
1020 | key_read(c, &dent2->key, &key); | |
1021 | if (keys_cmp(c, &zbr2->key, &key)) { | |
552ff317 AB |
1022 | ubifs_err("2nd entry at %d:%d has key %s", zbr1->lnum, |
1023 | zbr1->offs, DBGKEY(&key)); | |
1024 | ubifs_err("but it should have key %s according to tnc", | |
2ba5f7ae AB |
1025 | DBGKEY(&zbr2->key)); |
1026 | dbg_dump_node(c, dent2); | |
552ff317 | 1027 | goto out_free; |
1e51764a AB |
1028 | } |
1029 | ||
1030 | nlen1 = le16_to_cpu(dent1->nlen); | |
1031 | nlen2 = le16_to_cpu(dent2->nlen); | |
1032 | ||
1033 | cmp = memcmp(dent1->name, dent2->name, min_t(int, nlen1, nlen2)); | |
1034 | if (cmp < 0 || (cmp == 0 && nlen1 < nlen2)) { | |
1035 | err = 0; | |
1036 | goto out_free; | |
1037 | } | |
1038 | if (cmp == 0 && nlen1 == nlen2) | |
552ff317 | 1039 | ubifs_err("2 xent/dent nodes with the same name"); |
1e51764a | 1040 | else |
552ff317 | 1041 | ubifs_err("bad order of colliding key %s", |
1e51764a AB |
1042 | DBGKEY(&key)); |
1043 | ||
552ff317 | 1044 | ubifs_msg("first node at %d:%d\n", zbr1->lnum, zbr1->offs); |
1e51764a | 1045 | dbg_dump_node(c, dent1); |
552ff317 | 1046 | ubifs_msg("second node at %d:%d\n", zbr2->lnum, zbr2->offs); |
1e51764a AB |
1047 | dbg_dump_node(c, dent2); |
1048 | ||
1049 | out_free: | |
1050 | kfree(dent2); | |
1051 | kfree(dent1); | |
1052 | return err; | |
1053 | } | |
1054 | ||
1055 | /** | |
1056 | * dbg_check_znode - check if znode is all right. | |
1057 | * @c: UBIFS file-system description object | |
1058 | * @zbr: zbranch which points to this znode | |
1059 | * | |
1060 | * This function makes sure that znode referred to by @zbr is all right. | |
1061 | * Returns zero if it is, and %-EINVAL if it is not. | |
1062 | */ | |
1063 | static int dbg_check_znode(struct ubifs_info *c, struct ubifs_zbranch *zbr) | |
1064 | { | |
1065 | struct ubifs_znode *znode = zbr->znode; | |
1066 | struct ubifs_znode *zp = znode->parent; | |
1067 | int n, err, cmp; | |
1068 | ||
1069 | if (znode->child_cnt <= 0 || znode->child_cnt > c->fanout) { | |
1070 | err = 1; | |
1071 | goto out; | |
1072 | } | |
1073 | if (znode->level < 0) { | |
1074 | err = 2; | |
1075 | goto out; | |
1076 | } | |
1077 | if (znode->iip < 0 || znode->iip >= c->fanout) { | |
1078 | err = 3; | |
1079 | goto out; | |
1080 | } | |
1081 | ||
1082 | if (zbr->len == 0) | |
1083 | /* Only dirty zbranch may have no on-flash nodes */ | |
1084 | if (!ubifs_zn_dirty(znode)) { | |
1085 | err = 4; | |
1086 | goto out; | |
1087 | } | |
1088 | ||
1089 | if (ubifs_zn_dirty(znode)) { | |
1090 | /* | |
1091 | * If znode is dirty, its parent has to be dirty as well. The | |
1092 | * order of the operation is important, so we have to have | |
1093 | * memory barriers. | |
1094 | */ | |
1095 | smp_mb(); | |
1096 | if (zp && !ubifs_zn_dirty(zp)) { | |
1097 | /* | |
1098 | * The dirty flag is atomic and is cleared outside the | |
1099 | * TNC mutex, so znode's dirty flag may now have | |
1100 | * been cleared. The child is always cleared before the | |
1101 | * parent, so we just need to check again. | |
1102 | */ | |
1103 | smp_mb(); | |
1104 | if (ubifs_zn_dirty(znode)) { | |
1105 | err = 5; | |
1106 | goto out; | |
1107 | } | |
1108 | } | |
1109 | } | |
1110 | ||
1111 | if (zp) { | |
1112 | const union ubifs_key *min, *max; | |
1113 | ||
1114 | if (znode->level != zp->level - 1) { | |
1115 | err = 6; | |
1116 | goto out; | |
1117 | } | |
1118 | ||
1119 | /* Make sure the 'parent' pointer in our znode is correct */ | |
1120 | err = ubifs_search_zbranch(c, zp, &zbr->key, &n); | |
1121 | if (!err) { | |
1122 | /* This zbranch does not exist in the parent */ | |
1123 | err = 7; | |
1124 | goto out; | |
1125 | } | |
1126 | ||
1127 | if (znode->iip >= zp->child_cnt) { | |
1128 | err = 8; | |
1129 | goto out; | |
1130 | } | |
1131 | ||
1132 | if (znode->iip != n) { | |
1133 | /* This may happen only in case of collisions */ | |
1134 | if (keys_cmp(c, &zp->zbranch[n].key, | |
1135 | &zp->zbranch[znode->iip].key)) { | |
1136 | err = 9; | |
1137 | goto out; | |
1138 | } | |
1139 | n = znode->iip; | |
1140 | } | |
1141 | ||
1142 | /* | |
1143 | * Make sure that the first key in our znode is greater than or | |
1144 | * equal to the key in the pointing zbranch. | |
1145 | */ | |
1146 | min = &zbr->key; | |
1147 | cmp = keys_cmp(c, min, &znode->zbranch[0].key); | |
1148 | if (cmp == 1) { | |
1149 | err = 10; | |
1150 | goto out; | |
1151 | } | |
1152 | ||
1153 | if (n + 1 < zp->child_cnt) { | |
1154 | max = &zp->zbranch[n + 1].key; | |
1155 | ||
1156 | /* | |
1157 | * Make sure the last key in our znode is less or | |
1158 | * equivalent than the the key in zbranch which goes | |
1159 | * after our pointing zbranch. | |
1160 | */ | |
1161 | cmp = keys_cmp(c, max, | |
1162 | &znode->zbranch[znode->child_cnt - 1].key); | |
1163 | if (cmp == -1) { | |
1164 | err = 11; | |
1165 | goto out; | |
1166 | } | |
1167 | } | |
1168 | } else { | |
1169 | /* This may only be root znode */ | |
1170 | if (zbr != &c->zroot) { | |
1171 | err = 12; | |
1172 | goto out; | |
1173 | } | |
1174 | } | |
1175 | ||
1176 | /* | |
1177 | * Make sure that next key is greater or equivalent then the previous | |
1178 | * one. | |
1179 | */ | |
1180 | for (n = 1; n < znode->child_cnt; n++) { | |
1181 | cmp = keys_cmp(c, &znode->zbranch[n - 1].key, | |
1182 | &znode->zbranch[n].key); | |
1183 | if (cmp > 0) { | |
1184 | err = 13; | |
1185 | goto out; | |
1186 | } | |
1187 | if (cmp == 0) { | |
1188 | /* This can only be keys with colliding hash */ | |
1189 | if (!is_hash_key(c, &znode->zbranch[n].key)) { | |
1190 | err = 14; | |
1191 | goto out; | |
1192 | } | |
1193 | ||
1194 | if (znode->level != 0 || c->replaying) | |
1195 | continue; | |
1196 | ||
1197 | /* | |
1198 | * Colliding keys should follow binary order of | |
1199 | * corresponding xentry/dentry names. | |
1200 | */ | |
1201 | err = dbg_check_key_order(c, &znode->zbranch[n - 1], | |
1202 | &znode->zbranch[n]); | |
1203 | if (err < 0) | |
1204 | return err; | |
1205 | if (err) { | |
1206 | err = 15; | |
1207 | goto out; | |
1208 | } | |
1209 | } | |
1210 | } | |
1211 | ||
1212 | for (n = 0; n < znode->child_cnt; n++) { | |
1213 | if (!znode->zbranch[n].znode && | |
1214 | (znode->zbranch[n].lnum == 0 || | |
1215 | znode->zbranch[n].len == 0)) { | |
1216 | err = 16; | |
1217 | goto out; | |
1218 | } | |
1219 | ||
1220 | if (znode->zbranch[n].lnum != 0 && | |
1221 | znode->zbranch[n].len == 0) { | |
1222 | err = 17; | |
1223 | goto out; | |
1224 | } | |
1225 | ||
1226 | if (znode->zbranch[n].lnum == 0 && | |
1227 | znode->zbranch[n].len != 0) { | |
1228 | err = 18; | |
1229 | goto out; | |
1230 | } | |
1231 | ||
1232 | if (znode->zbranch[n].lnum == 0 && | |
1233 | znode->zbranch[n].offs != 0) { | |
1234 | err = 19; | |
1235 | goto out; | |
1236 | } | |
1237 | ||
1238 | if (znode->level != 0 && znode->zbranch[n].znode) | |
1239 | if (znode->zbranch[n].znode->parent != znode) { | |
1240 | err = 20; | |
1241 | goto out; | |
1242 | } | |
1243 | } | |
1244 | ||
1245 | return 0; | |
1246 | ||
1247 | out: | |
1248 | ubifs_err("failed, error %d", err); | |
1249 | ubifs_msg("dump of the znode"); | |
1250 | dbg_dump_znode(c, znode); | |
1251 | if (zp) { | |
1252 | ubifs_msg("dump of the parent znode"); | |
1253 | dbg_dump_znode(c, zp); | |
1254 | } | |
1255 | dump_stack(); | |
1256 | return -EINVAL; | |
1257 | } | |
1258 | ||
1259 | /** | |
1260 | * dbg_check_tnc - check TNC tree. | |
1261 | * @c: UBIFS file-system description object | |
1262 | * @extra: do extra checks that are possible at start commit | |
1263 | * | |
1264 | * This function traverses whole TNC tree and checks every znode. Returns zero | |
1265 | * if everything is all right and %-EINVAL if something is wrong with TNC. | |
1266 | */ | |
1267 | int dbg_check_tnc(struct ubifs_info *c, int extra) | |
1268 | { | |
1269 | struct ubifs_znode *znode; | |
1270 | long clean_cnt = 0, dirty_cnt = 0; | |
1271 | int err, last; | |
1272 | ||
1273 | if (!(ubifs_chk_flags & UBIFS_CHK_TNC)) | |
1274 | return 0; | |
1275 | ||
1276 | ubifs_assert(mutex_is_locked(&c->tnc_mutex)); | |
1277 | if (!c->zroot.znode) | |
1278 | return 0; | |
1279 | ||
1280 | znode = ubifs_tnc_postorder_first(c->zroot.znode); | |
1281 | while (1) { | |
1282 | struct ubifs_znode *prev; | |
1283 | struct ubifs_zbranch *zbr; | |
1284 | ||
1285 | if (!znode->parent) | |
1286 | zbr = &c->zroot; | |
1287 | else | |
1288 | zbr = &znode->parent->zbranch[znode->iip]; | |
1289 | ||
1290 | err = dbg_check_znode(c, zbr); | |
1291 | if (err) | |
1292 | return err; | |
1293 | ||
1294 | if (extra) { | |
1295 | if (ubifs_zn_dirty(znode)) | |
1296 | dirty_cnt += 1; | |
1297 | else | |
1298 | clean_cnt += 1; | |
1299 | } | |
1300 | ||
1301 | prev = znode; | |
1302 | znode = ubifs_tnc_postorder_next(znode); | |
1303 | if (!znode) | |
1304 | break; | |
1305 | ||
1306 | /* | |
1307 | * If the last key of this znode is equivalent to the first key | |
1308 | * of the next znode (collision), then check order of the keys. | |
1309 | */ | |
1310 | last = prev->child_cnt - 1; | |
1311 | if (prev->level == 0 && znode->level == 0 && !c->replaying && | |
1312 | !keys_cmp(c, &prev->zbranch[last].key, | |
1313 | &znode->zbranch[0].key)) { | |
1314 | err = dbg_check_key_order(c, &prev->zbranch[last], | |
1315 | &znode->zbranch[0]); | |
1316 | if (err < 0) | |
1317 | return err; | |
1318 | if (err) { | |
1319 | ubifs_msg("first znode"); | |
1320 | dbg_dump_znode(c, prev); | |
1321 | ubifs_msg("second znode"); | |
1322 | dbg_dump_znode(c, znode); | |
1323 | return -EINVAL; | |
1324 | } | |
1325 | } | |
1326 | } | |
1327 | ||
1328 | if (extra) { | |
1329 | if (clean_cnt != atomic_long_read(&c->clean_zn_cnt)) { | |
1330 | ubifs_err("incorrect clean_zn_cnt %ld, calculated %ld", | |
1331 | atomic_long_read(&c->clean_zn_cnt), | |
1332 | clean_cnt); | |
1333 | return -EINVAL; | |
1334 | } | |
1335 | if (dirty_cnt != atomic_long_read(&c->dirty_zn_cnt)) { | |
1336 | ubifs_err("incorrect dirty_zn_cnt %ld, calculated %ld", | |
1337 | atomic_long_read(&c->dirty_zn_cnt), | |
1338 | dirty_cnt); | |
1339 | return -EINVAL; | |
1340 | } | |
1341 | } | |
1342 | ||
1343 | return 0; | |
1344 | } | |
1345 | ||
1346 | /** | |
1347 | * dbg_walk_index - walk the on-flash index. | |
1348 | * @c: UBIFS file-system description object | |
1349 | * @leaf_cb: called for each leaf node | |
1350 | * @znode_cb: called for each indexing node | |
1351 | * @priv: private date which is passed to callbacks | |
1352 | * | |
1353 | * This function walks the UBIFS index and calls the @leaf_cb for each leaf | |
1354 | * node and @znode_cb for each indexing node. Returns zero in case of success | |
1355 | * and a negative error code in case of failure. | |
1356 | * | |
1357 | * It would be better if this function removed every znode it pulled to into | |
1358 | * the TNC, so that the behavior more closely matched the non-debugging | |
1359 | * behavior. | |
1360 | */ | |
1361 | int dbg_walk_index(struct ubifs_info *c, dbg_leaf_callback leaf_cb, | |
1362 | dbg_znode_callback znode_cb, void *priv) | |
1363 | { | |
1364 | int err; | |
1365 | struct ubifs_zbranch *zbr; | |
1366 | struct ubifs_znode *znode, *child; | |
1367 | ||
1368 | mutex_lock(&c->tnc_mutex); | |
1369 | /* If the root indexing node is not in TNC - pull it */ | |
1370 | if (!c->zroot.znode) { | |
1371 | c->zroot.znode = ubifs_load_znode(c, &c->zroot, NULL, 0); | |
1372 | if (IS_ERR(c->zroot.znode)) { | |
1373 | err = PTR_ERR(c->zroot.znode); | |
1374 | c->zroot.znode = NULL; | |
1375 | goto out_unlock; | |
1376 | } | |
1377 | } | |
1378 | ||
1379 | /* | |
1380 | * We are going to traverse the indexing tree in the postorder manner. | |
1381 | * Go down and find the leftmost indexing node where we are going to | |
1382 | * start from. | |
1383 | */ | |
1384 | znode = c->zroot.znode; | |
1385 | while (znode->level > 0) { | |
1386 | zbr = &znode->zbranch[0]; | |
1387 | child = zbr->znode; | |
1388 | if (!child) { | |
1389 | child = ubifs_load_znode(c, zbr, znode, 0); | |
1390 | if (IS_ERR(child)) { | |
1391 | err = PTR_ERR(child); | |
1392 | goto out_unlock; | |
1393 | } | |
1394 | zbr->znode = child; | |
1395 | } | |
1396 | ||
1397 | znode = child; | |
1398 | } | |
1399 | ||
1400 | /* Iterate over all indexing nodes */ | |
1401 | while (1) { | |
1402 | int idx; | |
1403 | ||
1404 | cond_resched(); | |
1405 | ||
1406 | if (znode_cb) { | |
1407 | err = znode_cb(c, znode, priv); | |
1408 | if (err) { | |
1409 | ubifs_err("znode checking function returned " | |
1410 | "error %d", err); | |
1411 | dbg_dump_znode(c, znode); | |
1412 | goto out_dump; | |
1413 | } | |
1414 | } | |
1415 | if (leaf_cb && znode->level == 0) { | |
1416 | for (idx = 0; idx < znode->child_cnt; idx++) { | |
1417 | zbr = &znode->zbranch[idx]; | |
1418 | err = leaf_cb(c, zbr, priv); | |
1419 | if (err) { | |
1420 | ubifs_err("leaf checking function " | |
1421 | "returned error %d, for leaf " | |
1422 | "at LEB %d:%d", | |
1423 | err, zbr->lnum, zbr->offs); | |
1424 | goto out_dump; | |
1425 | } | |
1426 | } | |
1427 | } | |
1428 | ||
1429 | if (!znode->parent) | |
1430 | break; | |
1431 | ||
1432 | idx = znode->iip + 1; | |
1433 | znode = znode->parent; | |
1434 | if (idx < znode->child_cnt) { | |
1435 | /* Switch to the next index in the parent */ | |
1436 | zbr = &znode->zbranch[idx]; | |
1437 | child = zbr->znode; | |
1438 | if (!child) { | |
1439 | child = ubifs_load_znode(c, zbr, znode, idx); | |
1440 | if (IS_ERR(child)) { | |
1441 | err = PTR_ERR(child); | |
1442 | goto out_unlock; | |
1443 | } | |
1444 | zbr->znode = child; | |
1445 | } | |
1446 | znode = child; | |
1447 | } else | |
1448 | /* | |
1449 | * This is the last child, switch to the parent and | |
1450 | * continue. | |
1451 | */ | |
1452 | continue; | |
1453 | ||
1454 | /* Go to the lowest leftmost znode in the new sub-tree */ | |
1455 | while (znode->level > 0) { | |
1456 | zbr = &znode->zbranch[0]; | |
1457 | child = zbr->znode; | |
1458 | if (!child) { | |
1459 | child = ubifs_load_znode(c, zbr, znode, 0); | |
1460 | if (IS_ERR(child)) { | |
1461 | err = PTR_ERR(child); | |
1462 | goto out_unlock; | |
1463 | } | |
1464 | zbr->znode = child; | |
1465 | } | |
1466 | znode = child; | |
1467 | } | |
1468 | } | |
1469 | ||
1470 | mutex_unlock(&c->tnc_mutex); | |
1471 | return 0; | |
1472 | ||
1473 | out_dump: | |
1474 | if (znode->parent) | |
1475 | zbr = &znode->parent->zbranch[znode->iip]; | |
1476 | else | |
1477 | zbr = &c->zroot; | |
1478 | ubifs_msg("dump of znode at LEB %d:%d", zbr->lnum, zbr->offs); | |
1479 | dbg_dump_znode(c, znode); | |
1480 | out_unlock: | |
1481 | mutex_unlock(&c->tnc_mutex); | |
1482 | return err; | |
1483 | } | |
1484 | ||
1485 | /** | |
1486 | * add_size - add znode size to partially calculated index size. | |
1487 | * @c: UBIFS file-system description object | |
1488 | * @znode: znode to add size for | |
1489 | * @priv: partially calculated index size | |
1490 | * | |
1491 | * This is a helper function for 'dbg_check_idx_size()' which is called for | |
1492 | * every indexing node and adds its size to the 'long long' variable pointed to | |
1493 | * by @priv. | |
1494 | */ | |
1495 | static int add_size(struct ubifs_info *c, struct ubifs_znode *znode, void *priv) | |
1496 | { | |
1497 | long long *idx_size = priv; | |
1498 | int add; | |
1499 | ||
1500 | add = ubifs_idx_node_sz(c, znode->child_cnt); | |
1501 | add = ALIGN(add, 8); | |
1502 | *idx_size += add; | |
1503 | return 0; | |
1504 | } | |
1505 | ||
1506 | /** | |
1507 | * dbg_check_idx_size - check index size. | |
1508 | * @c: UBIFS file-system description object | |
1509 | * @idx_size: size to check | |
1510 | * | |
1511 | * This function walks the UBIFS index, calculates its size and checks that the | |
1512 | * size is equivalent to @idx_size. Returns zero in case of success and a | |
1513 | * negative error code in case of failure. | |
1514 | */ | |
1515 | int dbg_check_idx_size(struct ubifs_info *c, long long idx_size) | |
1516 | { | |
1517 | int err; | |
1518 | long long calc = 0; | |
1519 | ||
1520 | if (!(ubifs_chk_flags & UBIFS_CHK_IDX_SZ)) | |
1521 | return 0; | |
1522 | ||
1523 | err = dbg_walk_index(c, NULL, add_size, &calc); | |
1524 | if (err) { | |
1525 | ubifs_err("error %d while walking the index", err); | |
1526 | return err; | |
1527 | } | |
1528 | ||
1529 | if (calc != idx_size) { | |
1530 | ubifs_err("index size check failed: calculated size is %lld, " | |
1531 | "should be %lld", calc, idx_size); | |
1532 | dump_stack(); | |
1533 | return -EINVAL; | |
1534 | } | |
1535 | ||
1536 | return 0; | |
1537 | } | |
1538 | ||
1539 | /** | |
1540 | * struct fsck_inode - information about an inode used when checking the file-system. | |
1541 | * @rb: link in the RB-tree of inodes | |
1542 | * @inum: inode number | |
1543 | * @mode: inode type, permissions, etc | |
1544 | * @nlink: inode link count | |
1545 | * @xattr_cnt: count of extended attributes | |
1546 | * @references: how many directory/xattr entries refer this inode (calculated | |
1547 | * while walking the index) | |
1548 | * @calc_cnt: for directory inode count of child directories | |
1549 | * @size: inode size (read from on-flash inode) | |
1550 | * @xattr_sz: summary size of all extended attributes (read from on-flash | |
1551 | * inode) | |
1552 | * @calc_sz: for directories calculated directory size | |
1553 | * @calc_xcnt: count of extended attributes | |
1554 | * @calc_xsz: calculated summary size of all extended attributes | |
1555 | * @xattr_nms: sum of lengths of all extended attribute names belonging to this | |
1556 | * inode (read from on-flash inode) | |
1557 | * @calc_xnms: calculated sum of lengths of all extended attribute names | |
1558 | */ | |
1559 | struct fsck_inode { | |
1560 | struct rb_node rb; | |
1561 | ino_t inum; | |
1562 | umode_t mode; | |
1563 | unsigned int nlink; | |
1564 | unsigned int xattr_cnt; | |
1565 | int references; | |
1566 | int calc_cnt; | |
1567 | long long size; | |
1568 | unsigned int xattr_sz; | |
1569 | long long calc_sz; | |
1570 | long long calc_xcnt; | |
1571 | long long calc_xsz; | |
1572 | unsigned int xattr_nms; | |
1573 | long long calc_xnms; | |
1574 | }; | |
1575 | ||
1576 | /** | |
1577 | * struct fsck_data - private FS checking information. | |
1578 | * @inodes: RB-tree of all inodes (contains @struct fsck_inode objects) | |
1579 | */ | |
1580 | struct fsck_data { | |
1581 | struct rb_root inodes; | |
1582 | }; | |
1583 | ||
1584 | /** | |
1585 | * add_inode - add inode information to RB-tree of inodes. | |
1586 | * @c: UBIFS file-system description object | |
1587 | * @fsckd: FS checking information | |
1588 | * @ino: raw UBIFS inode to add | |
1589 | * | |
1590 | * This is a helper function for 'check_leaf()' which adds information about | |
1591 | * inode @ino to the RB-tree of inodes. Returns inode information pointer in | |
1592 | * case of success and a negative error code in case of failure. | |
1593 | */ | |
1594 | static struct fsck_inode *add_inode(struct ubifs_info *c, | |
1595 | struct fsck_data *fsckd, | |
1596 | struct ubifs_ino_node *ino) | |
1597 | { | |
1598 | struct rb_node **p, *parent = NULL; | |
1599 | struct fsck_inode *fscki; | |
1600 | ino_t inum = key_inum_flash(c, &ino->key); | |
1601 | ||
1602 | p = &fsckd->inodes.rb_node; | |
1603 | while (*p) { | |
1604 | parent = *p; | |
1605 | fscki = rb_entry(parent, struct fsck_inode, rb); | |
1606 | if (inum < fscki->inum) | |
1607 | p = &(*p)->rb_left; | |
1608 | else if (inum > fscki->inum) | |
1609 | p = &(*p)->rb_right; | |
1610 | else | |
1611 | return fscki; | |
1612 | } | |
1613 | ||
1614 | if (inum > c->highest_inum) { | |
1615 | ubifs_err("too high inode number, max. is %lu", | |
e84461ad | 1616 | (unsigned long)c->highest_inum); |
1e51764a AB |
1617 | return ERR_PTR(-EINVAL); |
1618 | } | |
1619 | ||
1620 | fscki = kzalloc(sizeof(struct fsck_inode), GFP_NOFS); | |
1621 | if (!fscki) | |
1622 | return ERR_PTR(-ENOMEM); | |
1623 | ||
1624 | fscki->inum = inum; | |
1625 | fscki->nlink = le32_to_cpu(ino->nlink); | |
1626 | fscki->size = le64_to_cpu(ino->size); | |
1627 | fscki->xattr_cnt = le32_to_cpu(ino->xattr_cnt); | |
1628 | fscki->xattr_sz = le32_to_cpu(ino->xattr_size); | |
1629 | fscki->xattr_nms = le32_to_cpu(ino->xattr_names); | |
1630 | fscki->mode = le32_to_cpu(ino->mode); | |
1631 | if (S_ISDIR(fscki->mode)) { | |
1632 | fscki->calc_sz = UBIFS_INO_NODE_SZ; | |
1633 | fscki->calc_cnt = 2; | |
1634 | } | |
1635 | rb_link_node(&fscki->rb, parent, p); | |
1636 | rb_insert_color(&fscki->rb, &fsckd->inodes); | |
1637 | return fscki; | |
1638 | } | |
1639 | ||
1640 | /** | |
1641 | * search_inode - search inode in the RB-tree of inodes. | |
1642 | * @fsckd: FS checking information | |
1643 | * @inum: inode number to search | |
1644 | * | |
1645 | * This is a helper function for 'check_leaf()' which searches inode @inum in | |
1646 | * the RB-tree of inodes and returns an inode information pointer or %NULL if | |
1647 | * the inode was not found. | |
1648 | */ | |
1649 | static struct fsck_inode *search_inode(struct fsck_data *fsckd, ino_t inum) | |
1650 | { | |
1651 | struct rb_node *p; | |
1652 | struct fsck_inode *fscki; | |
1653 | ||
1654 | p = fsckd->inodes.rb_node; | |
1655 | while (p) { | |
1656 | fscki = rb_entry(p, struct fsck_inode, rb); | |
1657 | if (inum < fscki->inum) | |
1658 | p = p->rb_left; | |
1659 | else if (inum > fscki->inum) | |
1660 | p = p->rb_right; | |
1661 | else | |
1662 | return fscki; | |
1663 | } | |
1664 | return NULL; | |
1665 | } | |
1666 | ||
1667 | /** | |
1668 | * read_add_inode - read inode node and add it to RB-tree of inodes. | |
1669 | * @c: UBIFS file-system description object | |
1670 | * @fsckd: FS checking information | |
1671 | * @inum: inode number to read | |
1672 | * | |
1673 | * This is a helper function for 'check_leaf()' which finds inode node @inum in | |
1674 | * the index, reads it, and adds it to the RB-tree of inodes. Returns inode | |
1675 | * information pointer in case of success and a negative error code in case of | |
1676 | * failure. | |
1677 | */ | |
1678 | static struct fsck_inode *read_add_inode(struct ubifs_info *c, | |
1679 | struct fsck_data *fsckd, ino_t inum) | |
1680 | { | |
1681 | int n, err; | |
1682 | union ubifs_key key; | |
1683 | struct ubifs_znode *znode; | |
1684 | struct ubifs_zbranch *zbr; | |
1685 | struct ubifs_ino_node *ino; | |
1686 | struct fsck_inode *fscki; | |
1687 | ||
1688 | fscki = search_inode(fsckd, inum); | |
1689 | if (fscki) | |
1690 | return fscki; | |
1691 | ||
1692 | ino_key_init(c, &key, inum); | |
1693 | err = ubifs_lookup_level0(c, &key, &znode, &n); | |
1694 | if (!err) { | |
e84461ad | 1695 | ubifs_err("inode %lu not found in index", (unsigned long)inum); |
1e51764a AB |
1696 | return ERR_PTR(-ENOENT); |
1697 | } else if (err < 0) { | |
e84461ad AB |
1698 | ubifs_err("error %d while looking up inode %lu", |
1699 | err, (unsigned long)inum); | |
1e51764a AB |
1700 | return ERR_PTR(err); |
1701 | } | |
1702 | ||
1703 | zbr = &znode->zbranch[n]; | |
1704 | if (zbr->len < UBIFS_INO_NODE_SZ) { | |
e84461ad AB |
1705 | ubifs_err("bad node %lu node length %d", |
1706 | (unsigned long)inum, zbr->len); | |
1e51764a AB |
1707 | return ERR_PTR(-EINVAL); |
1708 | } | |
1709 | ||
1710 | ino = kmalloc(zbr->len, GFP_NOFS); | |
1711 | if (!ino) | |
1712 | return ERR_PTR(-ENOMEM); | |
1713 | ||
1714 | err = ubifs_tnc_read_node(c, zbr, ino); | |
1715 | if (err) { | |
1716 | ubifs_err("cannot read inode node at LEB %d:%d, error %d", | |
1717 | zbr->lnum, zbr->offs, err); | |
1718 | kfree(ino); | |
1719 | return ERR_PTR(err); | |
1720 | } | |
1721 | ||
1722 | fscki = add_inode(c, fsckd, ino); | |
1723 | kfree(ino); | |
1724 | if (IS_ERR(fscki)) { | |
1725 | ubifs_err("error %ld while adding inode %lu node", | |
e84461ad | 1726 | PTR_ERR(fscki), (unsigned long)inum); |
1e51764a AB |
1727 | return fscki; |
1728 | } | |
1729 | ||
1730 | return fscki; | |
1731 | } | |
1732 | ||
1733 | /** | |
1734 | * check_leaf - check leaf node. | |
1735 | * @c: UBIFS file-system description object | |
1736 | * @zbr: zbranch of the leaf node to check | |
1737 | * @priv: FS checking information | |
1738 | * | |
1739 | * This is a helper function for 'dbg_check_filesystem()' which is called for | |
1740 | * every single leaf node while walking the indexing tree. It checks that the | |
1741 | * leaf node referred from the indexing tree exists, has correct CRC, and does | |
1742 | * some other basic validation. This function is also responsible for building | |
1743 | * an RB-tree of inodes - it adds all inodes into the RB-tree. It also | |
1744 | * calculates reference count, size, etc for each inode in order to later | |
1745 | * compare them to the information stored inside the inodes and detect possible | |
1746 | * inconsistencies. Returns zero in case of success and a negative error code | |
1747 | * in case of failure. | |
1748 | */ | |
1749 | static int check_leaf(struct ubifs_info *c, struct ubifs_zbranch *zbr, | |
1750 | void *priv) | |
1751 | { | |
1752 | ino_t inum; | |
1753 | void *node; | |
1754 | struct ubifs_ch *ch; | |
1755 | int err, type = key_type(c, &zbr->key); | |
1756 | struct fsck_inode *fscki; | |
1757 | ||
1758 | if (zbr->len < UBIFS_CH_SZ) { | |
1759 | ubifs_err("bad leaf length %d (LEB %d:%d)", | |
1760 | zbr->len, zbr->lnum, zbr->offs); | |
1761 | return -EINVAL; | |
1762 | } | |
1763 | ||
1764 | node = kmalloc(zbr->len, GFP_NOFS); | |
1765 | if (!node) | |
1766 | return -ENOMEM; | |
1767 | ||
1768 | err = ubifs_tnc_read_node(c, zbr, node); | |
1769 | if (err) { | |
1770 | ubifs_err("cannot read leaf node at LEB %d:%d, error %d", | |
1771 | zbr->lnum, zbr->offs, err); | |
1772 | goto out_free; | |
1773 | } | |
1774 | ||
1775 | /* If this is an inode node, add it to RB-tree of inodes */ | |
1776 | if (type == UBIFS_INO_KEY) { | |
1777 | fscki = add_inode(c, priv, node); | |
1778 | if (IS_ERR(fscki)) { | |
1779 | err = PTR_ERR(fscki); | |
1780 | ubifs_err("error %d while adding inode node", err); | |
1781 | goto out_dump; | |
1782 | } | |
1783 | goto out; | |
1784 | } | |
1785 | ||
1786 | if (type != UBIFS_DENT_KEY && type != UBIFS_XENT_KEY && | |
1787 | type != UBIFS_DATA_KEY) { | |
1788 | ubifs_err("unexpected node type %d at LEB %d:%d", | |
1789 | type, zbr->lnum, zbr->offs); | |
1790 | err = -EINVAL; | |
1791 | goto out_free; | |
1792 | } | |
1793 | ||
1794 | ch = node; | |
1795 | if (le64_to_cpu(ch->sqnum) > c->max_sqnum) { | |
1796 | ubifs_err("too high sequence number, max. is %llu", | |
1797 | c->max_sqnum); | |
1798 | err = -EINVAL; | |
1799 | goto out_dump; | |
1800 | } | |
1801 | ||
1802 | if (type == UBIFS_DATA_KEY) { | |
1803 | long long blk_offs; | |
1804 | struct ubifs_data_node *dn = node; | |
1805 | ||
1806 | /* | |
1807 | * Search the inode node this data node belongs to and insert | |
1808 | * it to the RB-tree of inodes. | |
1809 | */ | |
1810 | inum = key_inum_flash(c, &dn->key); | |
1811 | fscki = read_add_inode(c, priv, inum); | |
1812 | if (IS_ERR(fscki)) { | |
1813 | err = PTR_ERR(fscki); | |
1814 | ubifs_err("error %d while processing data node and " | |
e84461ad AB |
1815 | "trying to find inode node %lu", |
1816 | err, (unsigned long)inum); | |
1e51764a AB |
1817 | goto out_dump; |
1818 | } | |
1819 | ||
1820 | /* Make sure the data node is within inode size */ | |
1821 | blk_offs = key_block_flash(c, &dn->key); | |
1822 | blk_offs <<= UBIFS_BLOCK_SHIFT; | |
1823 | blk_offs += le32_to_cpu(dn->size); | |
1824 | if (blk_offs > fscki->size) { | |
1825 | ubifs_err("data node at LEB %d:%d is not within inode " | |
1826 | "size %lld", zbr->lnum, zbr->offs, | |
1827 | fscki->size); | |
1828 | err = -EINVAL; | |
1829 | goto out_dump; | |
1830 | } | |
1831 | } else { | |
1832 | int nlen; | |
1833 | struct ubifs_dent_node *dent = node; | |
1834 | struct fsck_inode *fscki1; | |
1835 | ||
1836 | err = ubifs_validate_entry(c, dent); | |
1837 | if (err) | |
1838 | goto out_dump; | |
1839 | ||
1840 | /* | |
1841 | * Search the inode node this entry refers to and the parent | |
1842 | * inode node and insert them to the RB-tree of inodes. | |
1843 | */ | |
1844 | inum = le64_to_cpu(dent->inum); | |
1845 | fscki = read_add_inode(c, priv, inum); | |
1846 | if (IS_ERR(fscki)) { | |
1847 | err = PTR_ERR(fscki); | |
1848 | ubifs_err("error %d while processing entry node and " | |
e84461ad AB |
1849 | "trying to find inode node %lu", |
1850 | err, (unsigned long)inum); | |
1e51764a AB |
1851 | goto out_dump; |
1852 | } | |
1853 | ||
1854 | /* Count how many direntries or xentries refers this inode */ | |
1855 | fscki->references += 1; | |
1856 | ||
1857 | inum = key_inum_flash(c, &dent->key); | |
1858 | fscki1 = read_add_inode(c, priv, inum); | |
1859 | if (IS_ERR(fscki1)) { | |
1860 | err = PTR_ERR(fscki); | |
1861 | ubifs_err("error %d while processing entry node and " | |
1862 | "trying to find parent inode node %lu", | |
e84461ad | 1863 | err, (unsigned long)inum); |
1e51764a AB |
1864 | goto out_dump; |
1865 | } | |
1866 | ||
1867 | nlen = le16_to_cpu(dent->nlen); | |
1868 | if (type == UBIFS_XENT_KEY) { | |
1869 | fscki1->calc_xcnt += 1; | |
1870 | fscki1->calc_xsz += CALC_DENT_SIZE(nlen); | |
1871 | fscki1->calc_xsz += CALC_XATTR_BYTES(fscki->size); | |
1872 | fscki1->calc_xnms += nlen; | |
1873 | } else { | |
1874 | fscki1->calc_sz += CALC_DENT_SIZE(nlen); | |
1875 | if (dent->type == UBIFS_ITYPE_DIR) | |
1876 | fscki1->calc_cnt += 1; | |
1877 | } | |
1878 | } | |
1879 | ||
1880 | out: | |
1881 | kfree(node); | |
1882 | return 0; | |
1883 | ||
1884 | out_dump: | |
1885 | ubifs_msg("dump of node at LEB %d:%d", zbr->lnum, zbr->offs); | |
1886 | dbg_dump_node(c, node); | |
1887 | out_free: | |
1888 | kfree(node); | |
1889 | return err; | |
1890 | } | |
1891 | ||
1892 | /** | |
1893 | * free_inodes - free RB-tree of inodes. | |
1894 | * @fsckd: FS checking information | |
1895 | */ | |
1896 | static void free_inodes(struct fsck_data *fsckd) | |
1897 | { | |
1898 | struct rb_node *this = fsckd->inodes.rb_node; | |
1899 | struct fsck_inode *fscki; | |
1900 | ||
1901 | while (this) { | |
1902 | if (this->rb_left) | |
1903 | this = this->rb_left; | |
1904 | else if (this->rb_right) | |
1905 | this = this->rb_right; | |
1906 | else { | |
1907 | fscki = rb_entry(this, struct fsck_inode, rb); | |
1908 | this = rb_parent(this); | |
1909 | if (this) { | |
1910 | if (this->rb_left == &fscki->rb) | |
1911 | this->rb_left = NULL; | |
1912 | else | |
1913 | this->rb_right = NULL; | |
1914 | } | |
1915 | kfree(fscki); | |
1916 | } | |
1917 | } | |
1918 | } | |
1919 | ||
1920 | /** | |
1921 | * check_inodes - checks all inodes. | |
1922 | * @c: UBIFS file-system description object | |
1923 | * @fsckd: FS checking information | |
1924 | * | |
1925 | * This is a helper function for 'dbg_check_filesystem()' which walks the | |
1926 | * RB-tree of inodes after the index scan has been finished, and checks that | |
1927 | * inode nlink, size, etc are correct. Returns zero if inodes are fine, | |
1928 | * %-EINVAL if not, and a negative error code in case of failure. | |
1929 | */ | |
1930 | static int check_inodes(struct ubifs_info *c, struct fsck_data *fsckd) | |
1931 | { | |
1932 | int n, err; | |
1933 | union ubifs_key key; | |
1934 | struct ubifs_znode *znode; | |
1935 | struct ubifs_zbranch *zbr; | |
1936 | struct ubifs_ino_node *ino; | |
1937 | struct fsck_inode *fscki; | |
1938 | struct rb_node *this = rb_first(&fsckd->inodes); | |
1939 | ||
1940 | while (this) { | |
1941 | fscki = rb_entry(this, struct fsck_inode, rb); | |
1942 | this = rb_next(this); | |
1943 | ||
1944 | if (S_ISDIR(fscki->mode)) { | |
1945 | /* | |
1946 | * Directories have to have exactly one reference (they | |
1947 | * cannot have hardlinks), although root inode is an | |
1948 | * exception. | |
1949 | */ | |
1950 | if (fscki->inum != UBIFS_ROOT_INO && | |
1951 | fscki->references != 1) { | |
1952 | ubifs_err("directory inode %lu has %d " | |
1953 | "direntries which refer it, but " | |
e84461ad AB |
1954 | "should be 1", |
1955 | (unsigned long)fscki->inum, | |
1e51764a AB |
1956 | fscki->references); |
1957 | goto out_dump; | |
1958 | } | |
1959 | if (fscki->inum == UBIFS_ROOT_INO && | |
1960 | fscki->references != 0) { | |
1961 | ubifs_err("root inode %lu has non-zero (%d) " | |
1962 | "direntries which refer it", | |
e84461ad AB |
1963 | (unsigned long)fscki->inum, |
1964 | fscki->references); | |
1e51764a AB |
1965 | goto out_dump; |
1966 | } | |
1967 | if (fscki->calc_sz != fscki->size) { | |
1968 | ubifs_err("directory inode %lu size is %lld, " | |
1969 | "but calculated size is %lld", | |
e84461ad AB |
1970 | (unsigned long)fscki->inum, |
1971 | fscki->size, fscki->calc_sz); | |
1e51764a AB |
1972 | goto out_dump; |
1973 | } | |
1974 | if (fscki->calc_cnt != fscki->nlink) { | |
1975 | ubifs_err("directory inode %lu nlink is %d, " | |
1976 | "but calculated nlink is %d", | |
e84461ad AB |
1977 | (unsigned long)fscki->inum, |
1978 | fscki->nlink, fscki->calc_cnt); | |
1e51764a AB |
1979 | goto out_dump; |
1980 | } | |
1981 | } else { | |
1982 | if (fscki->references != fscki->nlink) { | |
1983 | ubifs_err("inode %lu nlink is %d, but " | |
e84461ad AB |
1984 | "calculated nlink is %d", |
1985 | (unsigned long)fscki->inum, | |
1e51764a AB |
1986 | fscki->nlink, fscki->references); |
1987 | goto out_dump; | |
1988 | } | |
1989 | } | |
1990 | if (fscki->xattr_sz != fscki->calc_xsz) { | |
1991 | ubifs_err("inode %lu has xattr size %u, but " | |
1992 | "calculated size is %lld", | |
e84461ad | 1993 | (unsigned long)fscki->inum, fscki->xattr_sz, |
1e51764a AB |
1994 | fscki->calc_xsz); |
1995 | goto out_dump; | |
1996 | } | |
1997 | if (fscki->xattr_cnt != fscki->calc_xcnt) { | |
1998 | ubifs_err("inode %lu has %u xattrs, but " | |
e84461ad AB |
1999 | "calculated count is %lld", |
2000 | (unsigned long)fscki->inum, | |
1e51764a AB |
2001 | fscki->xattr_cnt, fscki->calc_xcnt); |
2002 | goto out_dump; | |
2003 | } | |
2004 | if (fscki->xattr_nms != fscki->calc_xnms) { | |
2005 | ubifs_err("inode %lu has xattr names' size %u, but " | |
2006 | "calculated names' size is %lld", | |
e84461ad | 2007 | (unsigned long)fscki->inum, fscki->xattr_nms, |
1e51764a AB |
2008 | fscki->calc_xnms); |
2009 | goto out_dump; | |
2010 | } | |
2011 | } | |
2012 | ||
2013 | return 0; | |
2014 | ||
2015 | out_dump: | |
2016 | /* Read the bad inode and dump it */ | |
2017 | ino_key_init(c, &key, fscki->inum); | |
2018 | err = ubifs_lookup_level0(c, &key, &znode, &n); | |
2019 | if (!err) { | |
e84461ad AB |
2020 | ubifs_err("inode %lu not found in index", |
2021 | (unsigned long)fscki->inum); | |
1e51764a AB |
2022 | return -ENOENT; |
2023 | } else if (err < 0) { | |
2024 | ubifs_err("error %d while looking up inode %lu", | |
e84461ad | 2025 | err, (unsigned long)fscki->inum); |
1e51764a AB |
2026 | return err; |
2027 | } | |
2028 | ||
2029 | zbr = &znode->zbranch[n]; | |
2030 | ino = kmalloc(zbr->len, GFP_NOFS); | |
2031 | if (!ino) | |
2032 | return -ENOMEM; | |
2033 | ||
2034 | err = ubifs_tnc_read_node(c, zbr, ino); | |
2035 | if (err) { | |
2036 | ubifs_err("cannot read inode node at LEB %d:%d, error %d", | |
2037 | zbr->lnum, zbr->offs, err); | |
2038 | kfree(ino); | |
2039 | return err; | |
2040 | } | |
2041 | ||
2042 | ubifs_msg("dump of the inode %lu sitting in LEB %d:%d", | |
e84461ad | 2043 | (unsigned long)fscki->inum, zbr->lnum, zbr->offs); |
1e51764a AB |
2044 | dbg_dump_node(c, ino); |
2045 | kfree(ino); | |
2046 | return -EINVAL; | |
2047 | } | |
2048 | ||
2049 | /** | |
2050 | * dbg_check_filesystem - check the file-system. | |
2051 | * @c: UBIFS file-system description object | |
2052 | * | |
2053 | * This function checks the file system, namely: | |
2054 | * o makes sure that all leaf nodes exist and their CRCs are correct; | |
2055 | * o makes sure inode nlink, size, xattr size/count are correct (for all | |
2056 | * inodes). | |
2057 | * | |
2058 | * The function reads whole indexing tree and all nodes, so it is pretty | |
2059 | * heavy-weight. Returns zero if the file-system is consistent, %-EINVAL if | |
2060 | * not, and a negative error code in case of failure. | |
2061 | */ | |
2062 | int dbg_check_filesystem(struct ubifs_info *c) | |
2063 | { | |
2064 | int err; | |
2065 | struct fsck_data fsckd; | |
2066 | ||
2067 | if (!(ubifs_chk_flags & UBIFS_CHK_FS)) | |
2068 | return 0; | |
2069 | ||
2070 | fsckd.inodes = RB_ROOT; | |
2071 | err = dbg_walk_index(c, check_leaf, NULL, &fsckd); | |
2072 | if (err) | |
2073 | goto out_free; | |
2074 | ||
2075 | err = check_inodes(c, &fsckd); | |
2076 | if (err) | |
2077 | goto out_free; | |
2078 | ||
2079 | free_inodes(&fsckd); | |
2080 | return 0; | |
2081 | ||
2082 | out_free: | |
2083 | ubifs_err("file-system check failed with error %d", err); | |
2084 | dump_stack(); | |
2085 | free_inodes(&fsckd); | |
2086 | return err; | |
2087 | } | |
2088 | ||
2089 | static int invocation_cnt; | |
2090 | ||
2091 | int dbg_force_in_the_gaps(void) | |
2092 | { | |
2093 | if (!dbg_force_in_the_gaps_enabled) | |
2094 | return 0; | |
2095 | /* Force in-the-gaps every 8th commit */ | |
2096 | return !((invocation_cnt++) & 0x7); | |
2097 | } | |
2098 | ||
2099 | /* Failure mode for recovery testing */ | |
2100 | ||
2101 | #define chance(n, d) (simple_rand() <= (n) * 32768LL / (d)) | |
2102 | ||
2103 | struct failure_mode_info { | |
2104 | struct list_head list; | |
2105 | struct ubifs_info *c; | |
2106 | }; | |
2107 | ||
2108 | static LIST_HEAD(fmi_list); | |
2109 | static DEFINE_SPINLOCK(fmi_lock); | |
2110 | ||
2111 | static unsigned int next; | |
2112 | ||
2113 | static int simple_rand(void) | |
2114 | { | |
2115 | if (next == 0) | |
2116 | next = current->pid; | |
2117 | next = next * 1103515245 + 12345; | |
2118 | return (next >> 16) & 32767; | |
2119 | } | |
2120 | ||
17c2f9f8 | 2121 | static void failure_mode_init(struct ubifs_info *c) |
1e51764a AB |
2122 | { |
2123 | struct failure_mode_info *fmi; | |
2124 | ||
2125 | fmi = kmalloc(sizeof(struct failure_mode_info), GFP_NOFS); | |
2126 | if (!fmi) { | |
552ff317 | 2127 | ubifs_err("Failed to register failure mode - no memory"); |
1e51764a AB |
2128 | return; |
2129 | } | |
2130 | fmi->c = c; | |
2131 | spin_lock(&fmi_lock); | |
2132 | list_add_tail(&fmi->list, &fmi_list); | |
2133 | spin_unlock(&fmi_lock); | |
2134 | } | |
2135 | ||
17c2f9f8 | 2136 | static void failure_mode_exit(struct ubifs_info *c) |
1e51764a AB |
2137 | { |
2138 | struct failure_mode_info *fmi, *tmp; | |
2139 | ||
2140 | spin_lock(&fmi_lock); | |
2141 | list_for_each_entry_safe(fmi, tmp, &fmi_list, list) | |
2142 | if (fmi->c == c) { | |
2143 | list_del(&fmi->list); | |
2144 | kfree(fmi); | |
2145 | } | |
2146 | spin_unlock(&fmi_lock); | |
2147 | } | |
2148 | ||
2149 | static struct ubifs_info *dbg_find_info(struct ubi_volume_desc *desc) | |
2150 | { | |
2151 | struct failure_mode_info *fmi; | |
2152 | ||
2153 | spin_lock(&fmi_lock); | |
2154 | list_for_each_entry(fmi, &fmi_list, list) | |
2155 | if (fmi->c->ubi == desc) { | |
2156 | struct ubifs_info *c = fmi->c; | |
2157 | ||
2158 | spin_unlock(&fmi_lock); | |
2159 | return c; | |
2160 | } | |
2161 | spin_unlock(&fmi_lock); | |
2162 | return NULL; | |
2163 | } | |
2164 | ||
2165 | static int in_failure_mode(struct ubi_volume_desc *desc) | |
2166 | { | |
2167 | struct ubifs_info *c = dbg_find_info(desc); | |
2168 | ||
2169 | if (c && dbg_failure_mode) | |
17c2f9f8 | 2170 | return c->dbg->failure_mode; |
1e51764a AB |
2171 | return 0; |
2172 | } | |
2173 | ||
2174 | static int do_fail(struct ubi_volume_desc *desc, int lnum, int write) | |
2175 | { | |
2176 | struct ubifs_info *c = dbg_find_info(desc); | |
17c2f9f8 | 2177 | struct ubifs_debug_info *d; |
1e51764a AB |
2178 | |
2179 | if (!c || !dbg_failure_mode) | |
2180 | return 0; | |
17c2f9f8 AB |
2181 | d = c->dbg; |
2182 | if (d->failure_mode) | |
1e51764a | 2183 | return 1; |
17c2f9f8 | 2184 | if (!d->fail_cnt) { |
1e51764a AB |
2185 | /* First call - decide delay to failure */ |
2186 | if (chance(1, 2)) { | |
2187 | unsigned int delay = 1 << (simple_rand() >> 11); | |
2188 | ||
2189 | if (chance(1, 2)) { | |
17c2f9f8 AB |
2190 | d->fail_delay = 1; |
2191 | d->fail_timeout = jiffies + | |
1e51764a AB |
2192 | msecs_to_jiffies(delay); |
2193 | dbg_rcvry("failing after %ums", delay); | |
2194 | } else { | |
17c2f9f8 AB |
2195 | d->fail_delay = 2; |
2196 | d->fail_cnt_max = delay; | |
1e51764a AB |
2197 | dbg_rcvry("failing after %u calls", delay); |
2198 | } | |
2199 | } | |
17c2f9f8 | 2200 | d->fail_cnt += 1; |
1e51764a AB |
2201 | } |
2202 | /* Determine if failure delay has expired */ | |
17c2f9f8 AB |
2203 | if (d->fail_delay == 1) { |
2204 | if (time_before(jiffies, d->fail_timeout)) | |
1e51764a | 2205 | return 0; |
17c2f9f8 AB |
2206 | } else if (d->fail_delay == 2) |
2207 | if (d->fail_cnt++ < d->fail_cnt_max) | |
1e51764a AB |
2208 | return 0; |
2209 | if (lnum == UBIFS_SB_LNUM) { | |
2210 | if (write) { | |
2211 | if (chance(1, 2)) | |
2212 | return 0; | |
2213 | } else if (chance(19, 20)) | |
2214 | return 0; | |
2215 | dbg_rcvry("failing in super block LEB %d", lnum); | |
2216 | } else if (lnum == UBIFS_MST_LNUM || lnum == UBIFS_MST_LNUM + 1) { | |
2217 | if (chance(19, 20)) | |
2218 | return 0; | |
2219 | dbg_rcvry("failing in master LEB %d", lnum); | |
2220 | } else if (lnum >= UBIFS_LOG_LNUM && lnum <= c->log_last) { | |
2221 | if (write) { | |
2222 | if (chance(99, 100)) | |
2223 | return 0; | |
2224 | } else if (chance(399, 400)) | |
2225 | return 0; | |
2226 | dbg_rcvry("failing in log LEB %d", lnum); | |
2227 | } else if (lnum >= c->lpt_first && lnum <= c->lpt_last) { | |
2228 | if (write) { | |
2229 | if (chance(7, 8)) | |
2230 | return 0; | |
2231 | } else if (chance(19, 20)) | |
2232 | return 0; | |
2233 | dbg_rcvry("failing in LPT LEB %d", lnum); | |
2234 | } else if (lnum >= c->orph_first && lnum <= c->orph_last) { | |
2235 | if (write) { | |
2236 | if (chance(1, 2)) | |
2237 | return 0; | |
2238 | } else if (chance(9, 10)) | |
2239 | return 0; | |
2240 | dbg_rcvry("failing in orphan LEB %d", lnum); | |
2241 | } else if (lnum == c->ihead_lnum) { | |
2242 | if (chance(99, 100)) | |
2243 | return 0; | |
2244 | dbg_rcvry("failing in index head LEB %d", lnum); | |
2245 | } else if (c->jheads && lnum == c->jheads[GCHD].wbuf.lnum) { | |
2246 | if (chance(9, 10)) | |
2247 | return 0; | |
2248 | dbg_rcvry("failing in GC head LEB %d", lnum); | |
2249 | } else if (write && !RB_EMPTY_ROOT(&c->buds) && | |
2250 | !ubifs_search_bud(c, lnum)) { | |
2251 | if (chance(19, 20)) | |
2252 | return 0; | |
2253 | dbg_rcvry("failing in non-bud LEB %d", lnum); | |
2254 | } else if (c->cmt_state == COMMIT_RUNNING_BACKGROUND || | |
2255 | c->cmt_state == COMMIT_RUNNING_REQUIRED) { | |
2256 | if (chance(999, 1000)) | |
2257 | return 0; | |
2258 | dbg_rcvry("failing in bud LEB %d commit running", lnum); | |
2259 | } else { | |
2260 | if (chance(9999, 10000)) | |
2261 | return 0; | |
2262 | dbg_rcvry("failing in bud LEB %d commit not running", lnum); | |
2263 | } | |
2264 | ubifs_err("*** SETTING FAILURE MODE ON (LEB %d) ***", lnum); | |
17c2f9f8 | 2265 | d->failure_mode = 1; |
1e51764a AB |
2266 | dump_stack(); |
2267 | return 1; | |
2268 | } | |
2269 | ||
2270 | static void cut_data(const void *buf, int len) | |
2271 | { | |
2272 | int flen, i; | |
2273 | unsigned char *p = (void *)buf; | |
2274 | ||
2275 | flen = (len * (long long)simple_rand()) >> 15; | |
2276 | for (i = flen; i < len; i++) | |
2277 | p[i] = 0xff; | |
2278 | } | |
2279 | ||
2280 | int dbg_leb_read(struct ubi_volume_desc *desc, int lnum, char *buf, int offset, | |
2281 | int len, int check) | |
2282 | { | |
2283 | if (in_failure_mode(desc)) | |
2284 | return -EIO; | |
2285 | return ubi_leb_read(desc, lnum, buf, offset, len, check); | |
2286 | } | |
2287 | ||
2288 | int dbg_leb_write(struct ubi_volume_desc *desc, int lnum, const void *buf, | |
2289 | int offset, int len, int dtype) | |
2290 | { | |
16dfd804 | 2291 | int err, failing; |
1e51764a AB |
2292 | |
2293 | if (in_failure_mode(desc)) | |
2294 | return -EIO; | |
16dfd804 AH |
2295 | failing = do_fail(desc, lnum, 1); |
2296 | if (failing) | |
1e51764a AB |
2297 | cut_data(buf, len); |
2298 | err = ubi_leb_write(desc, lnum, buf, offset, len, dtype); | |
2299 | if (err) | |
2300 | return err; | |
16dfd804 | 2301 | if (failing) |
1e51764a AB |
2302 | return -EIO; |
2303 | return 0; | |
2304 | } | |
2305 | ||
2306 | int dbg_leb_change(struct ubi_volume_desc *desc, int lnum, const void *buf, | |
2307 | int len, int dtype) | |
2308 | { | |
2309 | int err; | |
2310 | ||
2311 | if (do_fail(desc, lnum, 1)) | |
2312 | return -EIO; | |
2313 | err = ubi_leb_change(desc, lnum, buf, len, dtype); | |
2314 | if (err) | |
2315 | return err; | |
2316 | if (do_fail(desc, lnum, 1)) | |
2317 | return -EIO; | |
2318 | return 0; | |
2319 | } | |
2320 | ||
2321 | int dbg_leb_erase(struct ubi_volume_desc *desc, int lnum) | |
2322 | { | |
2323 | int err; | |
2324 | ||
2325 | if (do_fail(desc, lnum, 0)) | |
2326 | return -EIO; | |
2327 | err = ubi_leb_erase(desc, lnum); | |
2328 | if (err) | |
2329 | return err; | |
2330 | if (do_fail(desc, lnum, 0)) | |
2331 | return -EIO; | |
2332 | return 0; | |
2333 | } | |
2334 | ||
2335 | int dbg_leb_unmap(struct ubi_volume_desc *desc, int lnum) | |
2336 | { | |
2337 | int err; | |
2338 | ||
2339 | if (do_fail(desc, lnum, 0)) | |
2340 | return -EIO; | |
2341 | err = ubi_leb_unmap(desc, lnum); | |
2342 | if (err) | |
2343 | return err; | |
2344 | if (do_fail(desc, lnum, 0)) | |
2345 | return -EIO; | |
2346 | return 0; | |
2347 | } | |
2348 | ||
2349 | int dbg_is_mapped(struct ubi_volume_desc *desc, int lnum) | |
2350 | { | |
2351 | if (in_failure_mode(desc)) | |
2352 | return -EIO; | |
2353 | return ubi_is_mapped(desc, lnum); | |
2354 | } | |
2355 | ||
2356 | int dbg_leb_map(struct ubi_volume_desc *desc, int lnum, int dtype) | |
2357 | { | |
2358 | int err; | |
2359 | ||
2360 | if (do_fail(desc, lnum, 0)) | |
2361 | return -EIO; | |
2362 | err = ubi_leb_map(desc, lnum, dtype); | |
2363 | if (err) | |
2364 | return err; | |
2365 | if (do_fail(desc, lnum, 0)) | |
2366 | return -EIO; | |
2367 | return 0; | |
2368 | } | |
2369 | ||
17c2f9f8 AB |
2370 | /** |
2371 | * ubifs_debugging_init - initialize UBIFS debugging. | |
2372 | * @c: UBIFS file-system description object | |
2373 | * | |
2374 | * This function initializes debugging-related data for the file system. | |
2375 | * Returns zero in case of success and a negative error code in case of | |
2376 | * failure. | |
2377 | */ | |
2378 | int ubifs_debugging_init(struct ubifs_info *c) | |
2379 | { | |
2380 | c->dbg = kzalloc(sizeof(struct ubifs_debug_info), GFP_KERNEL); | |
2381 | if (!c->dbg) | |
2382 | return -ENOMEM; | |
2383 | ||
2384 | c->dbg->buf = vmalloc(c->leb_size); | |
2385 | if (!c->dbg->buf) | |
2386 | goto out; | |
2387 | ||
2388 | failure_mode_init(c); | |
2389 | return 0; | |
2390 | ||
2391 | out: | |
2392 | kfree(c->dbg); | |
2393 | return -ENOMEM; | |
2394 | } | |
2395 | ||
2396 | /** | |
2397 | * ubifs_debugging_exit - free debugging data. | |
2398 | * @c: UBIFS file-system description object | |
2399 | */ | |
2400 | void ubifs_debugging_exit(struct ubifs_info *c) | |
2401 | { | |
2402 | failure_mode_exit(c); | |
2403 | vfree(c->dbg->buf); | |
2404 | kfree(c->dbg); | |
2405 | } | |
2406 | ||
552ff317 AB |
2407 | /* |
2408 | * Root directory for UBIFS stuff in debugfs. Contains sub-directories which | |
2409 | * contain the stuff specific to particular file-system mounts. | |
2410 | */ | |
2411 | static struct dentry *debugfs_rootdir; | |
2412 | ||
2413 | /** | |
2414 | * dbg_debugfs_init - initialize debugfs file-system. | |
2415 | * | |
2416 | * UBIFS uses debugfs file-system to expose various debugging knobs to | |
2417 | * user-space. This function creates "ubifs" directory in the debugfs | |
2418 | * file-system. Returns zero in case of success and a negative error code in | |
2419 | * case of failure. | |
2420 | */ | |
2421 | int dbg_debugfs_init(void) | |
2422 | { | |
2423 | debugfs_rootdir = debugfs_create_dir("ubifs", NULL); | |
2424 | if (IS_ERR(debugfs_rootdir)) { | |
2425 | int err = PTR_ERR(debugfs_rootdir); | |
2426 | ubifs_err("cannot create \"ubifs\" debugfs directory, " | |
2427 | "error %d\n", err); | |
2428 | return err; | |
2429 | } | |
2430 | ||
2431 | return 0; | |
2432 | } | |
2433 | ||
2434 | /** | |
2435 | * dbg_debugfs_exit - remove the "ubifs" directory from debugfs file-system. | |
2436 | */ | |
2437 | void dbg_debugfs_exit(void) | |
2438 | { | |
2439 | debugfs_remove(debugfs_rootdir); | |
2440 | } | |
2441 | ||
2442 | static int open_debugfs_file(struct inode *inode, struct file *file) | |
2443 | { | |
2444 | file->private_data = inode->i_private; | |
2445 | return 0; | |
2446 | } | |
2447 | ||
2448 | static ssize_t write_debugfs_file(struct file *file, const char __user *buf, | |
2449 | size_t count, loff_t *ppos) | |
2450 | { | |
2451 | struct ubifs_info *c = file->private_data; | |
2452 | struct ubifs_debug_info *d = c->dbg; | |
2453 | ||
2454 | if (file->f_path.dentry == d->dump_lprops) | |
2455 | dbg_dump_lprops(c); | |
2456 | else if (file->f_path.dentry == d->dump_budg) { | |
2457 | spin_lock(&c->space_lock); | |
2458 | dbg_dump_budg(c); | |
2459 | spin_unlock(&c->space_lock); | |
24fa9e94 | 2460 | } else if (file->f_path.dentry == d->dump_tnc) { |
552ff317 AB |
2461 | mutex_lock(&c->tnc_mutex); |
2462 | dbg_dump_tnc(c); | |
2463 | mutex_unlock(&c->tnc_mutex); | |
2464 | } else | |
2465 | return -EINVAL; | |
2466 | ||
2467 | *ppos += count; | |
2468 | return count; | |
2469 | } | |
2470 | ||
2471 | static const struct file_operations debugfs_fops = { | |
2472 | .open = open_debugfs_file, | |
2473 | .write = write_debugfs_file, | |
2474 | .owner = THIS_MODULE, | |
2475 | }; | |
2476 | ||
2477 | /** | |
2478 | * dbg_debugfs_init_fs - initialize debugfs for UBIFS instance. | |
2479 | * @c: UBIFS file-system description object | |
2480 | * | |
2481 | * This function creates all debugfs files for this instance of UBIFS. Returns | |
2482 | * zero in case of success and a negative error code in case of failure. | |
2483 | * | |
2484 | * Note, the only reason we have not merged this function with the | |
2485 | * 'ubifs_debugging_init()' function is because it is better to initialize | |
2486 | * debugfs interfaces at the very end of the mount process, and remove them at | |
2487 | * the very beginning of the mount process. | |
2488 | */ | |
2489 | int dbg_debugfs_init_fs(struct ubifs_info *c) | |
2490 | { | |
2491 | int err; | |
2492 | const char *fname; | |
2493 | struct dentry *dent; | |
2494 | struct ubifs_debug_info *d = c->dbg; | |
2495 | ||
2496 | sprintf(d->debugfs_dir_name, "ubi%d_%d", c->vi.ubi_num, c->vi.vol_id); | |
2497 | d->debugfs_dir = debugfs_create_dir(d->debugfs_dir_name, | |
2498 | debugfs_rootdir); | |
2499 | if (IS_ERR(d->debugfs_dir)) { | |
2500 | err = PTR_ERR(d->debugfs_dir); | |
2501 | ubifs_err("cannot create \"%s\" debugfs directory, error %d\n", | |
2502 | d->debugfs_dir_name, err); | |
2503 | goto out; | |
2504 | } | |
2505 | ||
2506 | fname = "dump_lprops"; | |
2507 | dent = debugfs_create_file(fname, S_IWUGO, d->debugfs_dir, c, | |
2508 | &debugfs_fops); | |
2509 | if (IS_ERR(dent)) | |
2510 | goto out_remove; | |
2511 | d->dump_lprops = dent; | |
2512 | ||
2513 | fname = "dump_budg"; | |
2514 | dent = debugfs_create_file(fname, S_IWUGO, d->debugfs_dir, c, | |
2515 | &debugfs_fops); | |
2516 | if (IS_ERR(dent)) | |
2517 | goto out_remove; | |
2518 | d->dump_budg = dent; | |
2519 | ||
2520 | fname = "dump_tnc"; | |
2521 | dent = debugfs_create_file(fname, S_IWUGO, d->debugfs_dir, c, | |
2522 | &debugfs_fops); | |
2523 | if (IS_ERR(dent)) | |
2524 | goto out_remove; | |
2525 | d->dump_tnc = dent; | |
2526 | ||
2527 | return 0; | |
2528 | ||
2529 | out_remove: | |
2530 | err = PTR_ERR(dent); | |
2531 | ubifs_err("cannot create \"%s\" debugfs directory, error %d\n", | |
2532 | fname, err); | |
2533 | debugfs_remove_recursive(d->debugfs_dir); | |
2534 | out: | |
2535 | return err; | |
2536 | } | |
2537 | ||
2538 | /** | |
2539 | * dbg_debugfs_exit_fs - remove all debugfs files. | |
2540 | * @c: UBIFS file-system description object | |
2541 | */ | |
2542 | void dbg_debugfs_exit_fs(struct ubifs_info *c) | |
2543 | { | |
2544 | debugfs_remove_recursive(c->dbg->debugfs_dir); | |
2545 | } | |
2546 | ||
1e51764a | 2547 | #endif /* CONFIG_UBIFS_FS_DEBUG */ |