Commit | Line | Data |
---|---|---|
b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
274dcf55 MM |
2 | /* |
3 | * What: /sys/kernel/debug/orangefs/debug-help | |
4 | * Date: June 2015 | |
5 | * Contact: Mike Marshall <hubcap@omnibond.com> | |
6 | * Description: | |
7 | * List of client and kernel debug keywords. | |
8 | * | |
9 | * | |
10 | * What: /sys/kernel/debug/orangefs/client-debug | |
11 | * Date: June 2015 | |
12 | * Contact: Mike Marshall <hubcap@omnibond.com> | |
13 | * Description: | |
14 | * Debug setting for "the client", the userspace | |
15 | * helper for the kernel module. | |
16 | * | |
17 | * | |
18 | * What: /sys/kernel/debug/orangefs/kernel-debug | |
19 | * Date: June 2015 | |
20 | * Contact: Mike Marshall <hubcap@omnibond.com> | |
21 | * Description: | |
22 | * Debug setting for the orangefs kernel module. | |
23 | * | |
24 | * Any of the keywords, or comma-separated lists | |
25 | * of keywords, from debug-help can be catted to | |
26 | * client-debug or kernel-debug. | |
27 | * | |
28 | * "none", "all" and "verbose" are special keywords | |
29 | * for client-debug. Setting client-debug to "all" | |
30 | * is kind of like trying to drink water from a | |
31 | * fire hose, "verbose" triggers most of the same | |
32 | * output except for the constant flow of output | |
33 | * from the main wait loop. | |
34 | * | |
35 | * "none" and "all" are similar settings for kernel-debug | |
36 | * no need for a "verbose". | |
37 | */ | |
38 | #include <linux/debugfs.h> | |
39 | #include <linux/slab.h> | |
40 | ||
41 | #include <linux/uaccess.h> | |
42 | ||
575e9461 | 43 | #include "orangefs-debugfs.h" |
274dcf55 | 44 | #include "protocol.h" |
575e9461 | 45 | #include "orangefs-kernel.h" |
274dcf55 | 46 | |
44f46410 MB |
47 | #define DEBUG_HELP_STRING_SIZE 4096 |
48 | #define HELP_STRING_UNINITIALIZED \ | |
49 | "Client Debug Keywords are unknown until the first time\n" \ | |
50 | "the client is started after boot.\n" | |
51 | #define ORANGEFS_KMOD_DEBUG_HELP_FILE "debug-help" | |
52 | #define ORANGEFS_KMOD_DEBUG_FILE "kernel-debug" | |
53 | #define ORANGEFS_CLIENT_DEBUG_FILE "client-debug" | |
54 | #define ORANGEFS_VERBOSE "verbose" | |
55 | #define ORANGEFS_ALL "all" | |
274dcf55 | 56 | |
44f46410 MB |
57 | /* |
58 | * An array of client_debug_mask will be built to hold debug keyword/mask | |
59 | * values fetched from userspace. | |
60 | */ | |
61 | struct client_debug_mask { | |
62 | char *keyword; | |
63 | __u64 mask1; | |
64 | __u64 mask2; | |
274dcf55 MM |
65 | }; |
66 | ||
0979cf95 | 67 | static void orangefs_kernel_debug_init(void); |
44f46410 MB |
68 | |
69 | static int orangefs_debug_help_open(struct inode *, struct file *); | |
274dcf55 MM |
70 | static void *help_start(struct seq_file *, loff_t *); |
71 | static void *help_next(struct seq_file *, void *, loff_t *); | |
72 | static void help_stop(struct seq_file *, void *); | |
73 | static int help_show(struct seq_file *, void *); | |
74 | ||
44f46410 | 75 | static int orangefs_debug_open(struct inode *, struct file *); |
274dcf55 MM |
76 | |
77 | static ssize_t orangefs_debug_read(struct file *, | |
78 | char __user *, | |
79 | size_t, | |
80 | loff_t *); | |
81 | ||
82 | static ssize_t orangefs_debug_write(struct file *, | |
83 | const char __user *, | |
84 | size_t, | |
85 | loff_t *); | |
86 | ||
44f46410 MB |
87 | static int orangefs_prepare_cdm_array(char *); |
88 | static void debug_mask_to_string(void *, int); | |
89 | static void do_k_string(void *, int); | |
90 | static void do_c_string(void *, int); | |
91 | static int keyword_is_amalgam(char *); | |
92 | static int check_amalgam_keyword(void *, int); | |
93 | static void debug_string_to_mask(char *, void *, int); | |
94 | static void do_c_mask(int, char *, struct client_debug_mask **); | |
95 | static void do_k_mask(int, char *, __u64 **); | |
96 | ||
97 | static char kernel_debug_string[ORANGEFS_MAX_DEBUG_STRING_LEN] = "none"; | |
98 | static char *debug_help_string; | |
99 | static char client_debug_string[ORANGEFS_MAX_DEBUG_STRING_LEN]; | |
100 | static char client_debug_array_string[ORANGEFS_MAX_DEBUG_STRING_LEN]; | |
101 | ||
44f46410 MB |
102 | static struct dentry *client_debug_dentry; |
103 | static struct dentry *debug_dir; | |
104 | ||
105 | static unsigned int kernel_mask_set_mod_init; | |
106 | static int orangefs_debug_disabled = 1; | |
107 | static int help_string_initialized; | |
108 | ||
109 | static const struct seq_operations help_debug_ops = { | |
110 | .start = help_start, | |
111 | .next = help_next, | |
112 | .stop = help_stop, | |
113 | .show = help_show, | |
114 | }; | |
115 | ||
3cf796af | 116 | static const struct file_operations debug_help_fops = { |
19ff7fcc | 117 | .owner = THIS_MODULE, |
44f46410 MB |
118 | .open = orangefs_debug_help_open, |
119 | .read = seq_read, | |
120 | .release = seq_release, | |
121 | .llseek = seq_lseek, | |
122 | }; | |
123 | ||
274dcf55 | 124 | static const struct file_operations kernel_debug_fops = { |
19ff7fcc | 125 | .owner = THIS_MODULE, |
274dcf55 MM |
126 | .open = orangefs_debug_open, |
127 | .read = orangefs_debug_read, | |
128 | .write = orangefs_debug_write, | |
129 | .llseek = generic_file_llseek, | |
130 | }; | |
131 | ||
44f46410 MB |
132 | static int client_all_index; |
133 | static int client_verbose_index; | |
134 | ||
135 | static struct client_debug_mask *cdm_array; | |
136 | static int cdm_element_count; | |
137 | ||
138 | static struct client_debug_mask client_debug_mask; | |
139 | ||
140 | /* | |
141 | * Used to protect data in ORANGEFS_KMOD_DEBUG_FILE and | |
142 | * ORANGEFS_KMOD_DEBUG_FILE. | |
143 | */ | |
144 | static DEFINE_MUTEX(orangefs_debug_lock); | |
145 | ||
dc033621 MM |
146 | /* Used to protect data in ORANGEFS_KMOD_DEBUG_HELP_FILE */ |
147 | static DEFINE_MUTEX(orangefs_help_file_lock); | |
148 | ||
274dcf55 MM |
149 | /* |
150 | * initialize kmod debug operations, create orangefs debugfs dir and | |
151 | * ORANGEFS_KMOD_DEBUG_HELP_FILE. | |
152 | */ | |
0979cf95 | 153 | void orangefs_debugfs_init(int debug_mask) |
274dcf55 | 154 | { |
44f46410 MB |
155 | /* convert input debug mask to a 64-bit unsigned integer */ |
156 | orangefs_gossip_debug_mask = (unsigned long long)debug_mask; | |
157 | ||
158 | /* | |
159 | * set the kernel's gossip debug string; invalid mask values will | |
160 | * be ignored. | |
161 | */ | |
162 | debug_mask_to_string(&orangefs_gossip_debug_mask, 0); | |
163 | ||
164 | /* remove any invalid values from the mask */ | |
165 | debug_string_to_mask(kernel_debug_string, &orangefs_gossip_debug_mask, | |
166 | 0); | |
167 | ||
168 | /* | |
169 | * if the mask has a non-zero value, then indicate that the mask | |
170 | * was set when the kernel module was loaded. The orangefs dev ioctl | |
171 | * command will look at this boolean to determine if the kernel's | |
172 | * debug mask should be overwritten when the client-core is started. | |
173 | */ | |
174 | if (orangefs_gossip_debug_mask != 0) | |
175 | kernel_mask_set_mod_init = true; | |
176 | ||
177 | pr_info("%s: called with debug mask: :%s: :%llx:\n", | |
178 | __func__, | |
179 | kernel_debug_string, | |
180 | (unsigned long long)orangefs_gossip_debug_mask); | |
181 | ||
274dcf55 | 182 | debug_dir = debugfs_create_dir("orangefs", NULL); |
274dcf55 | 183 | |
f095adba GKH |
184 | debugfs_create_file(ORANGEFS_KMOD_DEBUG_HELP_FILE, 0444, debug_dir, |
185 | debug_help_string, &debug_help_fops); | |
274dcf55 MM |
186 | |
187 | orangefs_debug_disabled = 0; | |
44f46410 | 188 | |
0979cf95 | 189 | orangefs_kernel_debug_init(); |
44f46410 MB |
190 | } |
191 | ||
192 | /* | |
193 | * initialize the kernel-debug file. | |
194 | */ | |
0979cf95 | 195 | static void orangefs_kernel_debug_init(void) |
44f46410 MB |
196 | { |
197 | int rc = -ENOMEM; | |
44f46410 MB |
198 | char *k_buffer = NULL; |
199 | ||
200 | gossip_debug(GOSSIP_DEBUGFS_DEBUG, "%s: start\n", __func__); | |
201 | ||
202 | k_buffer = kzalloc(ORANGEFS_MAX_DEBUG_STRING_LEN, GFP_KERNEL); | |
203 | if (!k_buffer) | |
204 | goto out; | |
205 | ||
206 | if (strlen(kernel_debug_string) + 1 < ORANGEFS_MAX_DEBUG_STRING_LEN) { | |
207 | strcpy(k_buffer, kernel_debug_string); | |
208 | strcat(k_buffer, "\n"); | |
209 | } else { | |
210 | strcpy(k_buffer, "none\n"); | |
211 | pr_info("%s: overflow 1!\n", __func__); | |
212 | } | |
213 | ||
f095adba GKH |
214 | debugfs_create_file(ORANGEFS_KMOD_DEBUG_FILE, 0444, debug_dir, k_buffer, |
215 | &kernel_debug_fops); | |
44f46410 | 216 | |
274dcf55 | 217 | out: |
44f46410 | 218 | gossip_debug(GOSSIP_DEBUGFS_DEBUG, "%s: rc:%d:\n", __func__, rc); |
274dcf55 MM |
219 | } |
220 | ||
44f46410 | 221 | |
8bb8aefd | 222 | void orangefs_debugfs_cleanup(void) |
274dcf55 | 223 | { |
2fa37fd7 | 224 | debugfs_remove_recursive(debug_dir); |
d23417a5 ZX |
225 | kfree(debug_help_string); |
226 | debug_help_string = NULL; | |
274dcf55 MM |
227 | } |
228 | ||
229 | /* open ORANGEFS_KMOD_DEBUG_HELP_FILE */ | |
230 | static int orangefs_debug_help_open(struct inode *inode, struct file *file) | |
231 | { | |
232 | int rc = -ENODEV; | |
233 | int ret; | |
234 | ||
235 | gossip_debug(GOSSIP_DEBUGFS_DEBUG, | |
236 | "orangefs_debug_help_open: start\n"); | |
237 | ||
238 | if (orangefs_debug_disabled) | |
239 | goto out; | |
240 | ||
241 | ret = seq_open(file, &help_debug_ops); | |
242 | if (ret) | |
243 | goto out; | |
244 | ||
245 | ((struct seq_file *)(file->private_data))->private = inode->i_private; | |
246 | ||
247 | rc = 0; | |
248 | ||
249 | out: | |
250 | gossip_debug(GOSSIP_DEBUGFS_DEBUG, | |
251 | "orangefs_debug_help_open: rc:%d:\n", | |
252 | rc); | |
253 | return rc; | |
254 | } | |
255 | ||
256 | /* | |
257 | * I think start always gets called again after stop. Start | |
258 | * needs to return NULL when it is done. The whole "payload" | |
259 | * in this case is a single (long) string, so by the second | |
260 | * time we get to start (pos = 1), we're done. | |
261 | */ | |
262 | static void *help_start(struct seq_file *m, loff_t *pos) | |
263 | { | |
264 | void *payload = NULL; | |
265 | ||
266 | gossip_debug(GOSSIP_DEBUGFS_DEBUG, "help_start: start\n"); | |
267 | ||
dc033621 MM |
268 | mutex_lock(&orangefs_help_file_lock); |
269 | ||
274dcf55 MM |
270 | if (*pos == 0) |
271 | payload = m->private; | |
272 | ||
273 | return payload; | |
274 | } | |
275 | ||
276 | static void *help_next(struct seq_file *m, void *v, loff_t *pos) | |
277 | { | |
9f198a2a | 278 | (*pos)++; |
274dcf55 MM |
279 | gossip_debug(GOSSIP_DEBUGFS_DEBUG, "help_next: start\n"); |
280 | ||
281 | return NULL; | |
282 | } | |
283 | ||
284 | static void help_stop(struct seq_file *m, void *p) | |
285 | { | |
286 | gossip_debug(GOSSIP_DEBUGFS_DEBUG, "help_stop: start\n"); | |
dc033621 | 287 | mutex_unlock(&orangefs_help_file_lock); |
274dcf55 MM |
288 | } |
289 | ||
290 | static int help_show(struct seq_file *m, void *v) | |
291 | { | |
292 | gossip_debug(GOSSIP_DEBUGFS_DEBUG, "help_show: start\n"); | |
293 | ||
294 | seq_puts(m, v); | |
295 | ||
296 | return 0; | |
297 | } | |
298 | ||
274dcf55 MM |
299 | /* |
300 | * initialize the client-debug file. | |
301 | */ | |
7a3bc1f0 | 302 | static int orangefs_client_debug_init(void) |
274dcf55 MM |
303 | { |
304 | ||
305 | int rc = -ENOMEM; | |
306 | char *c_buffer = NULL; | |
307 | ||
308 | gossip_debug(GOSSIP_DEBUGFS_DEBUG, "%s: start\n", __func__); | |
309 | ||
8bb8aefd | 310 | c_buffer = kzalloc(ORANGEFS_MAX_DEBUG_STRING_LEN, GFP_KERNEL); |
274dcf55 MM |
311 | if (!c_buffer) |
312 | goto out; | |
313 | ||
8bb8aefd | 314 | if (strlen(client_debug_string) + 1 < ORANGEFS_MAX_DEBUG_STRING_LEN) { |
274dcf55 MM |
315 | strcpy(c_buffer, client_debug_string); |
316 | strcat(c_buffer, "\n"); | |
317 | } else { | |
318 | strcpy(c_buffer, "none\n"); | |
319 | pr_info("%s: overflow! 2\n", __func__); | |
320 | } | |
321 | ||
322 | client_debug_dentry = debugfs_create_file(ORANGEFS_CLIENT_DEBUG_FILE, | |
323 | 0444, | |
324 | debug_dir, | |
325 | c_buffer, | |
326 | &kernel_debug_fops); | |
274dcf55 MM |
327 | |
328 | rc = 0; | |
329 | ||
330 | out: | |
274dcf55 MM |
331 | |
332 | gossip_debug(GOSSIP_DEBUGFS_DEBUG, "%s: rc:%d:\n", __func__, rc); | |
333 | return rc; | |
334 | } | |
335 | ||
336 | /* open ORANGEFS_KMOD_DEBUG_FILE or ORANGEFS_CLIENT_DEBUG_FILE.*/ | |
44f46410 | 337 | static int orangefs_debug_open(struct inode *inode, struct file *file) |
274dcf55 MM |
338 | { |
339 | int rc = -ENODEV; | |
340 | ||
341 | gossip_debug(GOSSIP_DEBUGFS_DEBUG, | |
342 | "%s: orangefs_debug_disabled: %d\n", | |
343 | __func__, | |
344 | orangefs_debug_disabled); | |
345 | ||
346 | if (orangefs_debug_disabled) | |
347 | goto out; | |
348 | ||
349 | rc = 0; | |
350 | mutex_lock(&orangefs_debug_lock); | |
351 | file->private_data = inode->i_private; | |
352 | mutex_unlock(&orangefs_debug_lock); | |
353 | ||
354 | out: | |
355 | gossip_debug(GOSSIP_DEBUGFS_DEBUG, | |
356 | "orangefs_debug_open: rc: %d\n", | |
357 | rc); | |
358 | return rc; | |
359 | } | |
360 | ||
361 | static ssize_t orangefs_debug_read(struct file *file, | |
362 | char __user *ubuf, | |
363 | size_t count, | |
364 | loff_t *ppos) | |
365 | { | |
366 | char *buf; | |
367 | int sprintf_ret; | |
368 | ssize_t read_ret = -ENOMEM; | |
369 | ||
370 | gossip_debug(GOSSIP_DEBUGFS_DEBUG, "orangefs_debug_read: start\n"); | |
371 | ||
8bb8aefd | 372 | buf = kmalloc(ORANGEFS_MAX_DEBUG_STRING_LEN, GFP_KERNEL); |
274dcf55 MM |
373 | if (!buf) |
374 | goto out; | |
375 | ||
376 | mutex_lock(&orangefs_debug_lock); | |
377 | sprintf_ret = sprintf(buf, "%s", (char *)file->private_data); | |
378 | mutex_unlock(&orangefs_debug_lock); | |
379 | ||
380 | read_ret = simple_read_from_buffer(ubuf, count, ppos, buf, sprintf_ret); | |
381 | ||
382 | kfree(buf); | |
383 | ||
384 | out: | |
385 | gossip_debug(GOSSIP_DEBUGFS_DEBUG, | |
386 | "orangefs_debug_read: ret: %zu\n", | |
387 | read_ret); | |
388 | ||
389 | return read_ret; | |
390 | } | |
391 | ||
392 | static ssize_t orangefs_debug_write(struct file *file, | |
393 | const char __user *ubuf, | |
394 | size_t count, | |
395 | loff_t *ppos) | |
396 | { | |
397 | char *buf; | |
398 | int rc = -EFAULT; | |
399 | size_t silly = 0; | |
400 | char *debug_string; | |
8bb8aefd | 401 | struct orangefs_kernel_op_s *new_op = NULL; |
274dcf55 | 402 | struct client_debug_mask c_mask = { NULL, 0, 0 }; |
45063097 | 403 | char *s; |
274dcf55 MM |
404 | |
405 | gossip_debug(GOSSIP_DEBUGFS_DEBUG, | |
f66debf1 AV |
406 | "orangefs_debug_write: %pD\n", |
407 | file); | |
274dcf55 | 408 | |
907bfcd8 DC |
409 | if (count == 0) |
410 | return 0; | |
411 | ||
274dcf55 MM |
412 | /* |
413 | * Thwart users who try to jamb a ridiculous number | |
414 | * of bytes into the debug file... | |
415 | */ | |
8bb8aefd | 416 | if (count > ORANGEFS_MAX_DEBUG_STRING_LEN + 1) { |
274dcf55 | 417 | silly = count; |
8bb8aefd | 418 | count = ORANGEFS_MAX_DEBUG_STRING_LEN + 1; |
274dcf55 MM |
419 | } |
420 | ||
dde58ca4 | 421 | buf = kzalloc(ORANGEFS_MAX_DEBUG_STRING_LEN, GFP_KERNEL); |
274dcf55 MM |
422 | if (!buf) |
423 | goto out; | |
274dcf55 MM |
424 | |
425 | if (copy_from_user(buf, ubuf, count - 1)) { | |
426 | gossip_debug(GOSSIP_DEBUGFS_DEBUG, | |
427 | "%s: copy_from_user failed!\n", | |
428 | __func__); | |
429 | goto out; | |
430 | } | |
431 | ||
432 | /* | |
433 | * Map the keyword string from userspace into a valid debug mask. | |
434 | * The mapping process involves mapping the human-inputted string | |
435 | * into a valid mask, and then rebuilding the string from the | |
436 | * verified valid mask. | |
437 | * | |
438 | * A service operation is required to set a new client-side | |
439 | * debug mask. | |
440 | */ | |
441 | if (!strcmp(file->f_path.dentry->d_name.name, | |
442 | ORANGEFS_KMOD_DEBUG_FILE)) { | |
44f46410 MB |
443 | debug_string_to_mask(buf, &orangefs_gossip_debug_mask, 0); |
444 | debug_mask_to_string(&orangefs_gossip_debug_mask, 0); | |
274dcf55 MM |
445 | debug_string = kernel_debug_string; |
446 | gossip_debug(GOSSIP_DEBUGFS_DEBUG, | |
447 | "New kernel debug string is %s\n", | |
448 | kernel_debug_string); | |
449 | } else { | |
450 | /* Can't reset client debug mask if client is not running. */ | |
451 | if (is_daemon_in_service()) { | |
452 | pr_info("%s: Client not running :%d:\n", | |
453 | __func__, | |
454 | is_daemon_in_service()); | |
455 | goto out; | |
456 | } | |
457 | ||
458 | debug_string_to_mask(buf, &c_mask, 1); | |
459 | debug_mask_to_string(&c_mask, 1); | |
460 | debug_string = client_debug_string; | |
461 | ||
8bb8aefd | 462 | new_op = op_alloc(ORANGEFS_VFS_OP_PARAM); |
274dcf55 MM |
463 | if (!new_op) { |
464 | pr_info("%s: op_alloc failed!\n", __func__); | |
465 | goto out; | |
466 | } | |
467 | ||
468 | new_op->upcall.req.param.op = | |
8bb8aefd YL |
469 | ORANGEFS_PARAM_REQUEST_OP_TWO_MASK_VALUES; |
470 | new_op->upcall.req.param.type = ORANGEFS_PARAM_REQUEST_SET; | |
274dcf55 MM |
471 | memset(new_op->upcall.req.param.s_value, |
472 | 0, | |
8bb8aefd | 473 | ORANGEFS_MAX_DEBUG_STRING_LEN); |
274dcf55 MM |
474 | sprintf(new_op->upcall.req.param.s_value, |
475 | "%llx %llx\n", | |
476 | c_mask.mask1, | |
477 | c_mask.mask2); | |
478 | ||
479 | /* service_operation returns 0 on success... */ | |
480 | rc = service_operation(new_op, | |
8bb8aefd YL |
481 | "orangefs_param", |
482 | ORANGEFS_OP_INTERRUPTIBLE); | |
274dcf55 MM |
483 | |
484 | if (rc) | |
485 | gossip_debug(GOSSIP_DEBUGFS_DEBUG, | |
486 | "%s: service_operation failed! rc:%d:\n", | |
487 | __func__, | |
488 | rc); | |
489 | ||
490 | op_release(new_op); | |
491 | } | |
492 | ||
493 | mutex_lock(&orangefs_debug_lock); | |
45063097 AV |
494 | s = file_inode(file)->i_private; |
495 | memset(s, 0, ORANGEFS_MAX_DEBUG_STRING_LEN); | |
496 | sprintf(s, "%s\n", debug_string); | |
274dcf55 MM |
497 | mutex_unlock(&orangefs_debug_lock); |
498 | ||
499 | *ppos += count; | |
500 | if (silly) | |
501 | rc = silly; | |
502 | else | |
503 | rc = count; | |
504 | ||
505 | out: | |
506 | gossip_debug(GOSSIP_DEBUGFS_DEBUG, | |
507 | "orangefs_debug_write: rc: %d\n", | |
508 | rc); | |
509 | kfree(buf); | |
510 | return rc; | |
511 | } | |
44f46410 MB |
512 | |
513 | /* | |
514 | * After obtaining a string representation of the client's debug | |
515 | * keywords and their associated masks, this function is called to build an | |
516 | * array of these values. | |
517 | */ | |
518 | static int orangefs_prepare_cdm_array(char *debug_array_string) | |
519 | { | |
520 | int i; | |
521 | int rc = -EINVAL; | |
522 | char *cds_head = NULL; | |
523 | char *cds_delimiter = NULL; | |
524 | int keyword_len = 0; | |
525 | ||
526 | gossip_debug(GOSSIP_UTILS_DEBUG, "%s: start\n", __func__); | |
527 | ||
528 | /* | |
529 | * figure out how many elements the cdm_array needs. | |
530 | */ | |
531 | for (i = 0; i < strlen(debug_array_string); i++) | |
532 | if (debug_array_string[i] == '\n') | |
533 | cdm_element_count++; | |
534 | ||
535 | if (!cdm_element_count) { | |
536 | pr_info("No elements in client debug array string!\n"); | |
537 | goto out; | |
538 | } | |
539 | ||
5e273a0e | 540 | cdm_array = kcalloc(cdm_element_count, sizeof(*cdm_array), GFP_KERNEL); |
44f46410 | 541 | if (!cdm_array) { |
44f46410 MB |
542 | rc = -ENOMEM; |
543 | goto out; | |
544 | } | |
545 | ||
546 | cds_head = debug_array_string; | |
547 | ||
548 | for (i = 0; i < cdm_element_count; i++) { | |
549 | cds_delimiter = strchr(cds_head, '\n'); | |
550 | *cds_delimiter = '\0'; | |
551 | ||
552 | keyword_len = strcspn(cds_head, " "); | |
553 | ||
554 | cdm_array[i].keyword = kzalloc(keyword_len + 1, GFP_KERNEL); | |
555 | if (!cdm_array[i].keyword) { | |
556 | rc = -ENOMEM; | |
557 | goto out; | |
558 | } | |
559 | ||
560 | sscanf(cds_head, | |
561 | "%s %llx %llx", | |
562 | cdm_array[i].keyword, | |
563 | (unsigned long long *)&(cdm_array[i].mask1), | |
564 | (unsigned long long *)&(cdm_array[i].mask2)); | |
565 | ||
566 | if (!strcmp(cdm_array[i].keyword, ORANGEFS_VERBOSE)) | |
567 | client_verbose_index = i; | |
568 | ||
569 | if (!strcmp(cdm_array[i].keyword, ORANGEFS_ALL)) | |
570 | client_all_index = i; | |
571 | ||
572 | cds_head = cds_delimiter + 1; | |
573 | } | |
574 | ||
575 | rc = cdm_element_count; | |
576 | ||
577 | gossip_debug(GOSSIP_UTILS_DEBUG, "%s: rc:%d:\n", __func__, rc); | |
578 | ||
579 | out: | |
580 | ||
581 | return rc; | |
582 | ||
583 | } | |
584 | ||
585 | /* | |
586 | * /sys/kernel/debug/orangefs/debug-help can be catted to | |
587 | * see all the available kernel and client debug keywords. | |
588 | * | |
dc033621 | 589 | * When orangefs.ko initializes, we have no idea what keywords the |
44f46410 MB |
590 | * client supports, nor their associated masks. |
591 | * | |
dc033621 | 592 | * We pass through this function once at module-load and stamp a |
44f46410 MB |
593 | * boilerplate "we don't know" message for the client in the |
594 | * debug-help file. We pass through here again when the client | |
595 | * starts and then we can fill out the debug-help file fully. | |
596 | * | |
597 | * The client might be restarted any number of times between | |
dc033621 | 598 | * module reloads, we only build the debug-help file the first time. |
44f46410 MB |
599 | */ |
600 | int orangefs_prepare_debugfs_help_string(int at_boot) | |
601 | { | |
44f46410 MB |
602 | char *client_title = "Client Debug Keywords:\n"; |
603 | char *kernel_title = "Kernel Debug Keywords:\n"; | |
dc033621 MM |
604 | size_t string_size = DEBUG_HELP_STRING_SIZE; |
605 | size_t result_size; | |
606 | size_t i; | |
607 | char *new; | |
608 | int rc = -EINVAL; | |
44f46410 MB |
609 | |
610 | gossip_debug(GOSSIP_UTILS_DEBUG, "%s: start\n", __func__); | |
611 | ||
dc033621 | 612 | if (at_boot) |
44f46410 | 613 | client_title = HELP_STRING_UNINITIALIZED; |
dc033621 MM |
614 | |
615 | /* build a new debug_help_string. */ | |
616 | new = kzalloc(DEBUG_HELP_STRING_SIZE, GFP_KERNEL); | |
617 | if (!new) { | |
618 | rc = -ENOMEM; | |
619 | goto out; | |
620 | } | |
621 | ||
622 | /* | |
623 | * strlcat(dst, src, size) will append at most | |
624 | * "size - strlen(dst) - 1" bytes of src onto dst, | |
625 | * null terminating the result, and return the total | |
626 | * length of the string it tried to create. | |
627 | * | |
628 | * We'll just plow through here building our new debug | |
629 | * help string and let strlcat take care of assuring that | |
630 | * dst doesn't overflow. | |
631 | */ | |
632 | strlcat(new, client_title, string_size); | |
633 | ||
634 | if (!at_boot) { | |
635 | ||
636 | /* | |
44f46410 MB |
637 | * fill the client keyword/mask array and remember |
638 | * how many elements there were. | |
639 | */ | |
640 | cdm_element_count = | |
641 | orangefs_prepare_cdm_array(client_debug_array_string); | |
4defb5f9 CIK |
642 | if (cdm_element_count <= 0) { |
643 | kfree(new); | |
44f46410 | 644 | goto out; |
4defb5f9 | 645 | } |
44f46410 | 646 | |
44f46410 | 647 | for (i = 0; i < cdm_element_count; i++) { |
dc033621 MM |
648 | strlcat(new, "\t", string_size); |
649 | strlcat(new, cdm_array[i].keyword, string_size); | |
650 | strlcat(new, "\n", string_size); | |
44f46410 | 651 | } |
44f46410 MB |
652 | } |
653 | ||
dc033621 MM |
654 | strlcat(new, "\n", string_size); |
655 | strlcat(new, kernel_title, string_size); | |
656 | ||
44f46410 | 657 | for (i = 0; i < num_kmod_keyword_mask_map; i++) { |
dc033621 MM |
658 | strlcat(new, "\t", string_size); |
659 | strlcat(new, s_kmod_keyword_mask_map[i].keyword, string_size); | |
660 | result_size = strlcat(new, "\n", string_size); | |
44f46410 MB |
661 | } |
662 | ||
dc033621 MM |
663 | /* See if we tried to put too many bytes into "new"... */ |
664 | if (result_size >= string_size) { | |
665 | kfree(new); | |
44f46410 MB |
666 | goto out; |
667 | } | |
668 | ||
dc033621 MM |
669 | if (at_boot) { |
670 | debug_help_string = new; | |
671 | } else { | |
672 | mutex_lock(&orangefs_help_file_lock); | |
673 | memset(debug_help_string, 0, DEBUG_HELP_STRING_SIZE); | |
674 | strlcat(debug_help_string, new, string_size); | |
675 | mutex_unlock(&orangefs_help_file_lock); | |
d23417a5 | 676 | kfree(new); |
44f46410 MB |
677 | } |
678 | ||
679 | rc = 0; | |
680 | ||
dc033621 | 681 | out: return rc; |
44f46410 MB |
682 | |
683 | } | |
684 | ||
685 | /* | |
686 | * kernel = type 0 | |
687 | * client = type 1 | |
688 | */ | |
689 | static void debug_mask_to_string(void *mask, int type) | |
690 | { | |
691 | int i; | |
692 | int len = 0; | |
693 | char *debug_string; | |
694 | int element_count = 0; | |
695 | ||
696 | gossip_debug(GOSSIP_UTILS_DEBUG, "%s: start\n", __func__); | |
697 | ||
698 | if (type) { | |
699 | debug_string = client_debug_string; | |
700 | element_count = cdm_element_count; | |
701 | } else { | |
702 | debug_string = kernel_debug_string; | |
703 | element_count = num_kmod_keyword_mask_map; | |
704 | } | |
705 | ||
706 | memset(debug_string, 0, ORANGEFS_MAX_DEBUG_STRING_LEN); | |
707 | ||
708 | /* | |
709 | * Some keywords, like "all" or "verbose", are amalgams of | |
710 | * numerous other keywords. Make a special check for those | |
711 | * before grinding through the whole mask only to find out | |
712 | * later... | |
713 | */ | |
714 | if (check_amalgam_keyword(mask, type)) | |
715 | goto out; | |
716 | ||
717 | /* Build the debug string. */ | |
718 | for (i = 0; i < element_count; i++) | |
719 | if (type) | |
720 | do_c_string(mask, i); | |
721 | else | |
722 | do_k_string(mask, i); | |
723 | ||
724 | len = strlen(debug_string); | |
725 | ||
726 | if ((len) && (type)) | |
727 | client_debug_string[len - 1] = '\0'; | |
728 | else if (len) | |
729 | kernel_debug_string[len - 1] = '\0'; | |
730 | else if (type) | |
731 | strcpy(client_debug_string, "none"); | |
732 | else | |
733 | strcpy(kernel_debug_string, "none"); | |
734 | ||
735 | out: | |
736 | gossip_debug(GOSSIP_UTILS_DEBUG, "%s: string:%s:\n", __func__, debug_string); | |
737 | ||
738 | return; | |
739 | ||
740 | } | |
741 | ||
742 | static void do_k_string(void *k_mask, int index) | |
743 | { | |
744 | __u64 *mask = (__u64 *) k_mask; | |
745 | ||
746 | if (keyword_is_amalgam((char *) s_kmod_keyword_mask_map[index].keyword)) | |
747 | goto out; | |
748 | ||
749 | if (*mask & s_kmod_keyword_mask_map[index].mask_val) { | |
750 | if ((strlen(kernel_debug_string) + | |
751 | strlen(s_kmod_keyword_mask_map[index].keyword)) | |
752 | < ORANGEFS_MAX_DEBUG_STRING_LEN - 1) { | |
753 | strcat(kernel_debug_string, | |
754 | s_kmod_keyword_mask_map[index].keyword); | |
755 | strcat(kernel_debug_string, ","); | |
756 | } else { | |
757 | gossip_err("%s: overflow!\n", __func__); | |
758 | strcpy(kernel_debug_string, ORANGEFS_ALL); | |
759 | goto out; | |
760 | } | |
761 | } | |
762 | ||
763 | out: | |
764 | ||
765 | return; | |
766 | } | |
767 | ||
768 | static void do_c_string(void *c_mask, int index) | |
769 | { | |
770 | struct client_debug_mask *mask = (struct client_debug_mask *) c_mask; | |
771 | ||
772 | if (keyword_is_amalgam(cdm_array[index].keyword)) | |
773 | goto out; | |
774 | ||
775 | if ((mask->mask1 & cdm_array[index].mask1) || | |
776 | (mask->mask2 & cdm_array[index].mask2)) { | |
777 | if ((strlen(client_debug_string) + | |
778 | strlen(cdm_array[index].keyword) + 1) | |
779 | < ORANGEFS_MAX_DEBUG_STRING_LEN - 2) { | |
780 | strcat(client_debug_string, | |
781 | cdm_array[index].keyword); | |
782 | strcat(client_debug_string, ","); | |
783 | } else { | |
784 | gossip_err("%s: overflow!\n", __func__); | |
785 | strcpy(client_debug_string, ORANGEFS_ALL); | |
786 | goto out; | |
787 | } | |
788 | } | |
789 | out: | |
790 | return; | |
791 | } | |
792 | ||
793 | static int keyword_is_amalgam(char *keyword) | |
794 | { | |
795 | int rc = 0; | |
796 | ||
797 | if ((!strcmp(keyword, ORANGEFS_ALL)) || (!strcmp(keyword, ORANGEFS_VERBOSE))) | |
798 | rc = 1; | |
799 | ||
800 | return rc; | |
801 | } | |
802 | ||
803 | /* | |
804 | * kernel = type 0 | |
805 | * client = type 1 | |
806 | * | |
807 | * return 1 if we found an amalgam. | |
808 | */ | |
809 | static int check_amalgam_keyword(void *mask, int type) | |
810 | { | |
811 | __u64 *k_mask; | |
812 | struct client_debug_mask *c_mask; | |
813 | int k_all_index = num_kmod_keyword_mask_map - 1; | |
814 | int rc = 0; | |
815 | ||
816 | if (type) { | |
817 | c_mask = (struct client_debug_mask *) mask; | |
818 | ||
819 | if ((c_mask->mask1 == cdm_array[client_all_index].mask1) && | |
820 | (c_mask->mask2 == cdm_array[client_all_index].mask2)) { | |
821 | strcpy(client_debug_string, ORANGEFS_ALL); | |
822 | rc = 1; | |
823 | goto out; | |
824 | } | |
825 | ||
826 | if ((c_mask->mask1 == cdm_array[client_verbose_index].mask1) && | |
827 | (c_mask->mask2 == cdm_array[client_verbose_index].mask2)) { | |
828 | strcpy(client_debug_string, ORANGEFS_VERBOSE); | |
829 | rc = 1; | |
830 | goto out; | |
831 | } | |
832 | ||
833 | } else { | |
834 | k_mask = (__u64 *) mask; | |
835 | ||
836 | if (*k_mask >= s_kmod_keyword_mask_map[k_all_index].mask_val) { | |
837 | strcpy(kernel_debug_string, ORANGEFS_ALL); | |
838 | rc = 1; | |
839 | goto out; | |
840 | } | |
841 | } | |
842 | ||
843 | out: | |
844 | ||
845 | return rc; | |
846 | } | |
847 | ||
848 | /* | |
849 | * kernel = type 0 | |
850 | * client = type 1 | |
851 | */ | |
852 | static void debug_string_to_mask(char *debug_string, void *mask, int type) | |
853 | { | |
854 | char *unchecked_keyword; | |
855 | int i; | |
856 | char *strsep_fodder = kstrdup(debug_string, GFP_KERNEL); | |
857 | char *original_pointer; | |
858 | int element_count = 0; | |
859 | struct client_debug_mask *c_mask = NULL; | |
860 | __u64 *k_mask = NULL; | |
861 | ||
862 | gossip_debug(GOSSIP_UTILS_DEBUG, "%s: start\n", __func__); | |
863 | ||
864 | if (type) { | |
865 | c_mask = (struct client_debug_mask *)mask; | |
866 | element_count = cdm_element_count; | |
867 | } else { | |
868 | k_mask = (__u64 *)mask; | |
869 | *k_mask = 0; | |
870 | element_count = num_kmod_keyword_mask_map; | |
871 | } | |
872 | ||
873 | original_pointer = strsep_fodder; | |
874 | while ((unchecked_keyword = strsep(&strsep_fodder, ","))) | |
875 | if (strlen(unchecked_keyword)) { | |
876 | for (i = 0; i < element_count; i++) | |
877 | if (type) | |
878 | do_c_mask(i, | |
879 | unchecked_keyword, | |
880 | &c_mask); | |
881 | else | |
882 | do_k_mask(i, | |
883 | unchecked_keyword, | |
884 | &k_mask); | |
885 | } | |
886 | ||
887 | kfree(original_pointer); | |
888 | } | |
889 | ||
890 | static void do_c_mask(int i, char *unchecked_keyword, | |
891 | struct client_debug_mask **sane_mask) | |
892 | { | |
893 | ||
894 | if (!strcmp(cdm_array[i].keyword, unchecked_keyword)) { | |
895 | (**sane_mask).mask1 = (**sane_mask).mask1 | cdm_array[i].mask1; | |
896 | (**sane_mask).mask2 = (**sane_mask).mask2 | cdm_array[i].mask2; | |
897 | } | |
898 | } | |
899 | ||
900 | static void do_k_mask(int i, char *unchecked_keyword, __u64 **sane_mask) | |
901 | { | |
902 | ||
903 | if (!strcmp(s_kmod_keyword_mask_map[i].keyword, unchecked_keyword)) | |
904 | **sane_mask = (**sane_mask) | | |
905 | s_kmod_keyword_mask_map[i].mask_val; | |
906 | } | |
907 | ||
908 | int orangefs_debugfs_new_client_mask(void __user *arg) | |
909 | { | |
910 | struct dev_mask2_info_s mask2_info = {0}; | |
911 | int ret; | |
912 | ||
913 | ret = copy_from_user(&mask2_info, | |
914 | (void __user *)arg, | |
915 | sizeof(struct dev_mask2_info_s)); | |
916 | ||
917 | if (ret != 0) | |
918 | return -EIO; | |
919 | ||
920 | client_debug_mask.mask1 = mask2_info.mask1_value; | |
921 | client_debug_mask.mask2 = mask2_info.mask2_value; | |
922 | ||
923 | pr_info("%s: client debug mask has been been received " | |
924 | ":%llx: :%llx:\n", | |
925 | __func__, | |
926 | (unsigned long long)client_debug_mask.mask1, | |
927 | (unsigned long long)client_debug_mask.mask2); | |
928 | ||
929 | return ret; | |
930 | } | |
931 | ||
dd59a647 | 932 | int orangefs_debugfs_new_client_string(void __user *arg) |
44f46410 MB |
933 | { |
934 | int ret; | |
935 | ||
936 | ret = copy_from_user(&client_debug_array_string, | |
05973c2e MM |
937 | (void __user *)arg, |
938 | ORANGEFS_MAX_DEBUG_STRING_LEN); | |
dc033621 MM |
939 | |
940 | if (ret != 0) { | |
941 | pr_info("%s: CLIENT_STRING: copy_from_user failed\n", | |
942 | __func__); | |
05973c2e | 943 | return -EFAULT; |
dc033621 | 944 | } |
44f46410 MB |
945 | |
946 | /* | |
947 | * The real client-core makes an effort to ensure | |
948 | * that actual strings that aren't too long to fit in | |
949 | * this buffer is what we get here. We're going to use | |
950 | * string functions on the stuff we got, so we'll make | |
951 | * this extra effort to try and keep from | |
952 | * flowing out of this buffer when we use the string | |
953 | * functions, even if somehow the stuff we end up | |
954 | * with here is garbage. | |
955 | */ | |
956 | client_debug_array_string[ORANGEFS_MAX_DEBUG_STRING_LEN - 1] = | |
957 | '\0'; | |
05973c2e | 958 | |
44f46410 MB |
959 | pr_info("%s: client debug array string has been received.\n", |
960 | __func__); | |
961 | ||
962 | if (!help_string_initialized) { | |
963 | ||
dc033621 | 964 | /* Build a proper debug help string. */ |
05973c2e MM |
965 | ret = orangefs_prepare_debugfs_help_string(0); |
966 | if (ret) { | |
44f46410 MB |
967 | gossip_err("%s: no debug help string \n", |
968 | __func__); | |
05973c2e | 969 | return ret; |
44f46410 MB |
970 | } |
971 | ||
44f46410 MB |
972 | } |
973 | ||
974 | debug_mask_to_string(&client_debug_mask, 1); | |
975 | ||
976 | debugfs_remove(client_debug_dentry); | |
977 | ||
978 | orangefs_client_debug_init(); | |
979 | ||
980 | help_string_initialized++; | |
981 | ||
05973c2e | 982 | return 0; |
44f46410 MB |
983 | } |
984 | ||
dd59a647 | 985 | int orangefs_debugfs_new_debug(void __user *arg) |
44f46410 MB |
986 | { |
987 | struct dev_mask_info_s mask_info = {0}; | |
988 | int ret; | |
989 | ||
990 | ret = copy_from_user(&mask_info, | |
991 | (void __user *)arg, | |
992 | sizeof(mask_info)); | |
993 | ||
994 | if (ret != 0) | |
995 | return -EIO; | |
996 | ||
997 | if (mask_info.mask_type == KERNEL_MASK) { | |
998 | if ((mask_info.mask_value == 0) | |
999 | && (kernel_mask_set_mod_init)) { | |
1000 | /* | |
1001 | * the kernel debug mask was set when the | |
1002 | * kernel module was loaded; don't override | |
1003 | * it if the client-core was started without | |
1004 | * a value for ORANGEFS_KMODMASK. | |
1005 | */ | |
1006 | return 0; | |
1007 | } | |
1008 | debug_mask_to_string(&mask_info.mask_value, | |
1009 | mask_info.mask_type); | |
1010 | orangefs_gossip_debug_mask = mask_info.mask_value; | |
1011 | pr_info("%s: kernel debug mask has been modified to " | |
1012 | ":%s: :%llx:\n", | |
1013 | __func__, | |
1014 | kernel_debug_string, | |
1015 | (unsigned long long)orangefs_gossip_debug_mask); | |
1016 | } else if (mask_info.mask_type == CLIENT_MASK) { | |
1017 | debug_mask_to_string(&mask_info.mask_value, | |
1018 | mask_info.mask_type); | |
1019 | pr_info("%s: client debug mask has been modified to" | |
1020 | ":%s: :%llx:\n", | |
1021 | __func__, | |
1022 | client_debug_string, | |
1023 | llu(mask_info.mask_value)); | |
1024 | } else { | |
79d7cd61 | 1025 | gossip_err("Invalid mask type....\n"); |
44f46410 MB |
1026 | return -EINVAL; |
1027 | } | |
1028 | ||
1029 | return ret; | |
1030 | } |