Commit | Line | Data |
---|---|---|
2d97a006 | 1 | /* |
4942c256 | 2 | * Copyright (C) 2019 Jonathan Rajotte <jonathan.rajotte-julien@efficios.com> |
159b042f | 3 | * Copyright (C) 2020 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
2d97a006 | 4 | * |
ab5be9fa | 5 | * SPDX-License-Identifier: LGPL-2.1-only |
2d97a006 | 6 | * |
2d97a006 JR |
7 | */ |
8 | ||
159b042f JG |
9 | #include <lttng/domain.h> |
10 | #include <lttng/lttng-error.h> | |
11 | #include <lttng/tracker.h> | |
2d97a006 | 12 | |
159b042f JG |
13 | #include <common/dynamic-array.h> |
14 | #include <common/error.h> | |
15 | #include <common/hashtable/hashtable.h> | |
16 | #include <common/hashtable/utils.h> | |
17 | #include <common/tracker.h> | |
18 | ||
19 | #include <stdbool.h> | |
20 | ||
21 | struct process_attr_tracker_values_comm_header { | |
22 | uint32_t count; | |
23 | }; | |
24 | ||
25 | struct process_attr_tracker_value_comm { | |
26 | /* enum lttng_process_attr_value_type */ | |
27 | int32_t type; | |
28 | union { | |
29 | struct process_attr_integral_value_comm integral; | |
30 | /* Includes the '\0' terminator. */ | |
31 | uint32_t name_len; | |
32 | } value; | |
33 | }; | |
34 | ||
35 | #define GET_INTEGRAL_COMM_VALUE(value_ptr, as_type) \ | |
36 | ((as_type)(is_signed(as_type) ? (value_ptr)->u._signed : \ | |
37 | (value_ptr)->u._unsigned)) | |
38 | ||
39 | #define SET_INTEGRAL_COMM_VALUE(comm_value, value) \ | |
40 | if (is_signed(typeof(value))) { \ | |
41 | (comm_value)->u._signed = \ | |
42 | (typeof((comm_value)->u._signed)) value; \ | |
43 | } else { \ | |
44 | (comm_value)->u._unsigned = \ | |
45 | (typeof((comm_value)->u._unsigned)) value; \ | |
2d97a006 JR |
46 | } |
47 | ||
159b042f JG |
48 | static inline bool is_virtual_process_attr(enum lttng_process_attr process_attr) |
49 | { | |
50 | return process_attr == LTTNG_PROCESS_ATTR_VIRTUAL_PROCESS_ID || | |
51 | process_attr == LTTNG_PROCESS_ATTR_VIRTUAL_USER_ID || | |
52 | process_attr == LTTNG_PROCESS_ATTR_VIRTUAL_GROUP_ID; | |
2d97a006 JR |
53 | } |
54 | ||
159b042f JG |
55 | static inline bool is_value_type_name( |
56 | enum lttng_process_attr_value_type value_type) | |
2d97a006 | 57 | { |
159b042f JG |
58 | return value_type == LTTNG_PROCESS_ATTR_VALUE_TYPE_USER_NAME || |
59 | value_type == LTTNG_PROCESS_ATTR_VALUE_TYPE_GROUP_NAME; | |
2d97a006 JR |
60 | } |
61 | ||
159b042f JG |
62 | LTTNG_HIDDEN |
63 | enum lttng_error_code process_attr_value_from_comm( | |
64 | enum lttng_domain_type domain, | |
65 | enum lttng_process_attr process_attr, | |
66 | enum lttng_process_attr_value_type value_type, | |
67 | const struct process_attr_integral_value_comm *integral_value, | |
68 | const struct lttng_buffer_view *value_view, | |
69 | struct process_attr_value **_value) | |
2d97a006 | 70 | { |
159b042f JG |
71 | char *name = NULL; |
72 | enum lttng_error_code ret = LTTNG_OK; | |
73 | struct process_attr_value *value = zmalloc(sizeof(*value)); | |
2d97a006 | 74 | |
159b042f JG |
75 | if (!value) { |
76 | ret = LTTNG_ERR_NOMEM; | |
2d97a006 JR |
77 | goto error; |
78 | } | |
79 | ||
159b042f JG |
80 | if (value_view && value_view->size > 0) { |
81 | if (value_view->data[value_view->size - 1] != '\0') { | |
82 | ret = LTTNG_ERR_INVALID; | |
83 | goto error; | |
84 | } | |
85 | name = strdup(value_view->data); | |
86 | if (!name) { | |
87 | ret = LTTNG_ERR_NOMEM; | |
74675e31 | 88 | goto error; |
159b042f JG |
89 | } |
90 | } | |
2d97a006 | 91 | |
159b042f JG |
92 | if (domain != LTTNG_DOMAIN_UST && domain != LTTNG_DOMAIN_KERNEL) { |
93 | ERR("Only the user space and kernel space domains may be specified to configure process attribute trackers"); | |
94 | ret = LTTNG_ERR_UNSUPPORTED_DOMAIN; | |
95 | goto error; | |
96 | } | |
2d97a006 | 97 | |
159b042f JG |
98 | if (!is_virtual_process_attr(process_attr) && |
99 | domain != LTTNG_DOMAIN_KERNEL) { | |
100 | ERR("Non-virtual process attributes can only be used in the kernel domain"); | |
101 | ret = LTTNG_ERR_UNSUPPORTED_DOMAIN; | |
102 | goto error; | |
103 | } | |
2d97a006 | 104 | |
159b042f | 105 | /* Only expect a payload for name value types. */ |
b78dab17 JG |
106 | if (is_value_type_name(value_type) && |
107 | (!value_view || value_view->size == 0)) { | |
159b042f JG |
108 | ret = LTTNG_ERR_INVALID_PROTOCOL; |
109 | goto error; | |
1ad5cb59 JG |
110 | } else if (!is_value_type_name(value_type) && value_view && |
111 | value_view->size != 0) { | |
159b042f JG |
112 | ret = LTTNG_ERR_INVALID_PROTOCOL; |
113 | goto error; | |
2d97a006 JR |
114 | } |
115 | ||
159b042f JG |
116 | value->type = value_type; |
117 | switch (process_attr) { | |
118 | case LTTNG_PROCESS_ATTR_PROCESS_ID: | |
119 | case LTTNG_PROCESS_ATTR_VIRTUAL_PROCESS_ID: | |
120 | if (value_type != LTTNG_PROCESS_ATTR_VALUE_TYPE_PID) { | |
121 | ERR("Invalid value type used for process ID process attribute"); | |
122 | ret = LTTNG_ERR_INVALID; | |
123 | goto error; | |
124 | } | |
125 | value->value.pid = | |
126 | GET_INTEGRAL_COMM_VALUE(integral_value, pid_t); | |
127 | break; | |
128 | case LTTNG_PROCESS_ATTR_USER_ID: | |
129 | case LTTNG_PROCESS_ATTR_VIRTUAL_USER_ID: | |
130 | switch (value_type) { | |
131 | case LTTNG_PROCESS_ATTR_VALUE_TYPE_UID: | |
132 | value->value.uid = GET_INTEGRAL_COMM_VALUE( | |
133 | integral_value, uid_t); | |
134 | break; | |
135 | case LTTNG_PROCESS_ATTR_VALUE_TYPE_USER_NAME: | |
136 | if (!name) { | |
137 | ret = LTTNG_ERR_INVALID; | |
138 | goto error; | |
139 | } | |
140 | ||
141 | value->value.user_name = name; | |
142 | name = NULL; | |
143 | break; | |
144 | default: | |
145 | ERR("Invalid value type used for user ID process attribute"); | |
146 | ret = LTTNG_ERR_INVALID; | |
147 | goto error; | |
148 | } | |
149 | break; | |
150 | case LTTNG_PROCESS_ATTR_GROUP_ID: | |
151 | case LTTNG_PROCESS_ATTR_VIRTUAL_GROUP_ID: | |
152 | switch (value_type) { | |
153 | case LTTNG_PROCESS_ATTR_VALUE_TYPE_GID: | |
154 | value->value.gid = GET_INTEGRAL_COMM_VALUE( | |
155 | integral_value, gid_t); | |
156 | break; | |
157 | case LTTNG_PROCESS_ATTR_VALUE_TYPE_GROUP_NAME: | |
158 | if (!name) { | |
159 | ret = LTTNG_ERR_INVALID; | |
160 | goto error; | |
161 | } | |
162 | ||
163 | value->value.group_name = name; | |
164 | name = NULL; | |
165 | break; | |
166 | default: | |
167 | ERR("Invalid value type used for group ID process attribute"); | |
168 | ret = LTTNG_ERR_INVALID; | |
169 | goto error; | |
170 | } | |
171 | break; | |
172 | default: | |
173 | ret = LTTNG_ERR_INVALID_PROTOCOL; | |
174 | goto error; | |
2d97a006 JR |
175 | } |
176 | ||
159b042f JG |
177 | *_value = value; |
178 | value = NULL; | |
d4e37173 | 179 | free(name); |
159b042f JG |
180 | return LTTNG_OK; |
181 | error: | |
182 | free(name); | |
183 | process_attr_value_destroy(value); | |
184 | return ret; | |
2d97a006 JR |
185 | } |
186 | ||
159b042f JG |
187 | LTTNG_HIDDEN |
188 | const char *lttng_process_attr_to_string(enum lttng_process_attr process_attr) | |
2d97a006 | 189 | { |
159b042f JG |
190 | switch (process_attr) { |
191 | case LTTNG_PROCESS_ATTR_PROCESS_ID: | |
192 | return "process ID"; | |
193 | case LTTNG_PROCESS_ATTR_VIRTUAL_PROCESS_ID: | |
194 | return "virtual process ID"; | |
195 | case LTTNG_PROCESS_ATTR_USER_ID: | |
196 | return "user ID"; | |
197 | case LTTNG_PROCESS_ATTR_VIRTUAL_USER_ID: | |
198 | return "virtual user ID"; | |
199 | case LTTNG_PROCESS_ATTR_GROUP_ID: | |
200 | return "group ID"; | |
201 | case LTTNG_PROCESS_ATTR_VIRTUAL_GROUP_ID: | |
202 | return "virtual group ID"; | |
203 | default: | |
204 | return "unknown process attribute"; | |
2d97a006 | 205 | } |
2d97a006 JR |
206 | } |
207 | ||
159b042f | 208 | static void process_attr_tracker_value_destructor(void *ptr) |
2d97a006 | 209 | { |
159b042f JG |
210 | struct process_attr_value *value = (typeof(value)) ptr; |
211 | ||
212 | process_attr_value_destroy(value); | |
2d97a006 JR |
213 | } |
214 | ||
159b042f JG |
215 | LTTNG_HIDDEN |
216 | struct lttng_process_attr_values *lttng_process_attr_values_create(void) | |
2d97a006 | 217 | { |
159b042f | 218 | struct lttng_process_attr_values *values = zmalloc(sizeof(*values)); |
2d97a006 | 219 | |
159b042f JG |
220 | if (!values) { |
221 | goto end; | |
2d97a006 JR |
222 | } |
223 | ||
159b042f JG |
224 | lttng_dynamic_pointer_array_init( |
225 | &values->array, process_attr_tracker_value_destructor); | |
226 | end: | |
227 | return values; | |
2d97a006 JR |
228 | } |
229 | ||
159b042f JG |
230 | LTTNG_HIDDEN |
231 | unsigned int _lttng_process_attr_values_get_count( | |
232 | const struct lttng_process_attr_values *values) | |
2d97a006 | 233 | { |
159b042f JG |
234 | return (unsigned int) lttng_dynamic_pointer_array_get_count( |
235 | &values->array); | |
2d97a006 JR |
236 | } |
237 | ||
159b042f JG |
238 | LTTNG_HIDDEN |
239 | const struct process_attr_value *lttng_process_attr_tracker_values_get_at_index( | |
240 | const struct lttng_process_attr_values *values, | |
241 | unsigned int index) | |
2d97a006 | 242 | { |
159b042f JG |
243 | return lttng_dynamic_pointer_array_get_pointer(&values->array, index); |
244 | } | |
2d97a006 | 245 | |
159b042f JG |
246 | static |
247 | int process_attr_tracker_value_serialize(const struct process_attr_value *value, | |
248 | struct lttng_dynamic_buffer *buffer) | |
249 | { | |
250 | int ret; | |
251 | struct process_attr_tracker_value_comm value_comm = { | |
252 | .type = (int32_t) value->type, | |
253 | }; | |
254 | const char *name = NULL; | |
255 | ||
256 | switch (value->type) { | |
257 | case LTTNG_PROCESS_ATTR_VALUE_TYPE_PID: | |
258 | SET_INTEGRAL_COMM_VALUE( | |
259 | &value_comm.value.integral, value->value.pid); | |
2d97a006 | 260 | break; |
159b042f JG |
261 | case LTTNG_PROCESS_ATTR_VALUE_TYPE_UID: |
262 | SET_INTEGRAL_COMM_VALUE( | |
263 | &value_comm.value.integral, value->value.uid); | |
2d97a006 | 264 | break; |
159b042f JG |
265 | case LTTNG_PROCESS_ATTR_VALUE_TYPE_GID: |
266 | SET_INTEGRAL_COMM_VALUE( | |
267 | &value_comm.value.integral, value->value.gid); | |
2d97a006 | 268 | break; |
159b042f JG |
269 | case LTTNG_PROCESS_ATTR_VALUE_TYPE_USER_NAME: |
270 | name = value->value.user_name; | |
2d97a006 | 271 | break; |
159b042f JG |
272 | case LTTNG_PROCESS_ATTR_VALUE_TYPE_GROUP_NAME: |
273 | name = value->value.group_name; | |
274 | break; | |
275 | default: | |
276 | abort(); | |
2d97a006 JR |
277 | } |
278 | ||
159b042f JG |
279 | if (name) { |
280 | value_comm.value.name_len = strlen(name) + 1; | |
a7a533cd | 281 | } |
159b042f JG |
282 | |
283 | ret = lttng_dynamic_buffer_append( | |
284 | buffer, &value_comm, sizeof(value_comm)); | |
285 | if (ret) { | |
286 | goto end; | |
287 | } | |
288 | ||
289 | if (name) { | |
290 | ret = lttng_dynamic_buffer_append( | |
291 | buffer, name, value_comm.value.name_len); | |
292 | } | |
293 | end: | |
a7a533cd JR |
294 | return ret; |
295 | } | |
296 | ||
159b042f JG |
297 | LTTNG_HIDDEN |
298 | int lttng_process_attr_values_serialize( | |
299 | const struct lttng_process_attr_values *values, | |
300 | struct lttng_dynamic_buffer *buffer) | |
a7a533cd JR |
301 | { |
302 | int ret; | |
159b042f JG |
303 | unsigned int count, i; |
304 | struct process_attr_tracker_values_comm_header header = {}; | |
a7a533cd | 305 | |
159b042f JG |
306 | count = _lttng_process_attr_values_get_count(values); |
307 | header.count = (uint32_t) count; | |
a7a533cd | 308 | |
159b042f | 309 | ret = lttng_dynamic_buffer_append(buffer, &header, sizeof(header)); |
a7a533cd | 310 | if (ret) { |
159b042f | 311 | goto end; |
2d97a006 JR |
312 | } |
313 | ||
159b042f JG |
314 | for (i = 0; i < count; i++) { |
315 | const struct process_attr_value *value = | |
316 | lttng_process_attr_tracker_values_get_at_index( | |
317 | values, i); | |
2d97a006 | 318 | |
159b042f JG |
319 | ret = process_attr_tracker_value_serialize(value, buffer); |
320 | if (ret) { | |
321 | goto end; | |
322 | } | |
2d97a006 | 323 | } |
159b042f JG |
324 | end: |
325 | return ret; | |
2d97a006 | 326 | } |
a7a533cd | 327 | |
159b042f JG |
328 | LTTNG_HIDDEN |
329 | ssize_t lttng_process_attr_values_create_from_buffer( | |
330 | enum lttng_domain_type domain, | |
331 | enum lttng_process_attr process_attr, | |
332 | const struct lttng_buffer_view *buffer_view, | |
333 | struct lttng_process_attr_values **_values) | |
a7a533cd | 334 | { |
159b042f JG |
335 | ssize_t offset; |
336 | unsigned int i; | |
337 | struct lttng_process_attr_values *values; | |
338 | struct lttng_buffer_view header_view; | |
339 | const struct process_attr_tracker_values_comm_header *header; | |
a7a533cd | 340 | |
159b042f JG |
341 | values = lttng_process_attr_values_create(); |
342 | if (!values) { | |
a7a533cd JR |
343 | goto error; |
344 | } | |
345 | ||
159b042f JG |
346 | header_view = lttng_buffer_view_from_view( |
347 | buffer_view, 0, sizeof(*header)); | |
348 | if (!header_view.data) { | |
a7a533cd JR |
349 | goto error; |
350 | } | |
159b042f JG |
351 | offset = header_view.size; |
352 | header = (typeof(header)) header_view.data; | |
353 | ||
354 | /* | |
355 | * Check that the number of values is not absurdly large with respect to | |
356 | * the received buffer's size. | |
357 | */ | |
358 | if (buffer_view->size < | |
359 | header->count * sizeof(struct process_attr_tracker_value_comm)) { | |
360 | goto error; | |
361 | } | |
362 | for (i = 0; i < (unsigned int) header->count; i++) { | |
363 | int ret; | |
364 | enum lttng_error_code ret_code; | |
365 | const struct process_attr_tracker_value_comm *value_comm; | |
366 | struct process_attr_value *value; | |
367 | enum lttng_process_attr_value_type type; | |
368 | struct lttng_buffer_view value_view; | |
369 | struct lttng_buffer_view value_name_view = {}; | |
370 | ||
371 | value_view = lttng_buffer_view_from_view( | |
372 | buffer_view, offset, sizeof(*value_comm)); | |
373 | if (!value_view.data) { | |
374 | goto error; | |
375 | } | |
a7a533cd | 376 | |
159b042f JG |
377 | offset += value_view.size; |
378 | value_comm = (typeof(value_comm)) value_view.data; | |
379 | type = (typeof(type)) value_comm->type; | |
a7a533cd | 380 | |
159b042f JG |
381 | if (is_value_type_name(type)) { |
382 | value_name_view = lttng_buffer_view_from_view( | |
383 | buffer_view, offset, | |
384 | value_comm->value.name_len); | |
385 | offset += value_name_view.size; | |
386 | } | |
387 | ret_code = process_attr_value_from_comm(domain, process_attr, | |
388 | type, &value_comm->value.integral, | |
389 | &value_name_view, &value); | |
390 | if (ret_code != LTTNG_OK) { | |
391 | goto error; | |
392 | } | |
a7a533cd | 393 | |
159b042f JG |
394 | ret = lttng_dynamic_pointer_array_add_pointer( |
395 | &values->array, value); | |
396 | if (ret) { | |
397 | process_attr_value_destroy(value); | |
398 | goto error; | |
399 | } | |
a7a533cd JR |
400 | } |
401 | ||
159b042f JG |
402 | *_values = values; |
403 | return offset; | |
404 | error: | |
405 | lttng_process_attr_values_destroy(values); | |
406 | return -1; | |
a7a533cd JR |
407 | } |
408 | ||
159b042f JG |
409 | LTTNG_HIDDEN |
410 | void lttng_process_attr_values_destroy(struct lttng_process_attr_values *values) | |
a7a533cd | 411 | { |
159b042f JG |
412 | if (!values) { |
413 | return; | |
414 | } | |
415 | lttng_dynamic_pointer_array_reset(&values->array); | |
416 | free(values); | |
a7a533cd JR |
417 | } |
418 | ||
159b042f JG |
419 | LTTNG_HIDDEN |
420 | struct process_attr_value *process_attr_value_copy( | |
421 | const struct process_attr_value *value) | |
a7a533cd | 422 | { |
159b042f | 423 | struct process_attr_value *new_value = NULL; |
e283e4a0 | 424 | |
159b042f | 425 | if (!value) { |
e283e4a0 JR |
426 | goto end; |
427 | } | |
428 | ||
159b042f JG |
429 | new_value = zmalloc(sizeof(*new_value)); |
430 | if (!new_value) { | |
431 | goto end; | |
432 | } | |
433 | if (is_value_type_name(value->type)) { | |
434 | const char *src = | |
435 | value->type == LTTNG_PROCESS_ATTR_VALUE_TYPE_USER_NAME ? | |
436 | value->value.user_name : | |
437 | value->value.group_name; | |
438 | char **dst = value->type == LTTNG_PROCESS_ATTR_VALUE_TYPE_USER_NAME ? | |
439 | &new_value->value.user_name : | |
440 | &new_value->value.group_name; | |
441 | ||
442 | new_value->type = value->type; | |
443 | *dst = strdup(src); | |
444 | if (!*dst) { | |
445 | goto error; | |
446 | } | |
447 | } else { | |
448 | *new_value = *value; | |
449 | } | |
e283e4a0 | 450 | end: |
159b042f JG |
451 | return new_value; |
452 | error: | |
453 | free(new_value); | |
454 | return NULL; | |
a7a533cd JR |
455 | } |
456 | ||
159b042f JG |
457 | LTTNG_HIDDEN |
458 | unsigned long process_attr_value_hash(const struct process_attr_value *a) | |
a7a533cd | 459 | { |
159b042f | 460 | unsigned long hash = hash_key_ulong((void *) a->type, lttng_ht_seed); |
9df6c82a | 461 | |
159b042f JG |
462 | switch (a->type) { |
463 | case LTTNG_PROCESS_ATTR_VALUE_TYPE_PID: | |
464 | hash ^= hash_key_ulong((void *) (unsigned long) a->value.pid, | |
465 | lttng_ht_seed); | |
466 | break; | |
467 | case LTTNG_PROCESS_ATTR_VALUE_TYPE_UID: | |
468 | hash ^= hash_key_ulong((void *) (unsigned long) a->value.uid, | |
469 | lttng_ht_seed); | |
470 | break; | |
471 | case LTTNG_PROCESS_ATTR_VALUE_TYPE_GID: | |
472 | hash ^= hash_key_ulong((void *) (unsigned long) a->value.gid, | |
473 | lttng_ht_seed); | |
474 | break; | |
475 | case LTTNG_PROCESS_ATTR_VALUE_TYPE_USER_NAME: | |
476 | hash ^= hash_key_str(a->value.user_name, lttng_ht_seed); | |
477 | break; | |
478 | case LTTNG_PROCESS_ATTR_VALUE_TYPE_GROUP_NAME: | |
479 | hash ^= hash_key_str(a->value.group_name, lttng_ht_seed); | |
480 | break; | |
481 | default: | |
482 | abort(); | |
a7a533cd JR |
483 | } |
484 | ||
159b042f | 485 | return hash; |
a7a533cd | 486 | } |
f19f5c96 | 487 | |
159b042f JG |
488 | LTTNG_HIDDEN |
489 | bool process_attr_tracker_value_equal(const struct process_attr_value *a, | |
490 | const struct process_attr_value *b) | |
f19f5c96 | 491 | { |
159b042f JG |
492 | if (a->type != b->type) { |
493 | return false; | |
f19f5c96 | 494 | } |
159b042f JG |
495 | switch (a->type) { |
496 | case LTTNG_PROCESS_ATTR_VALUE_TYPE_PID: | |
497 | return a->value.pid == b->value.pid; | |
498 | case LTTNG_PROCESS_ATTR_VALUE_TYPE_UID: | |
499 | return a->value.uid == b->value.uid; | |
500 | case LTTNG_PROCESS_ATTR_VALUE_TYPE_GID: | |
501 | return a->value.gid == b->value.gid; | |
502 | case LTTNG_PROCESS_ATTR_VALUE_TYPE_USER_NAME: | |
503 | return !strcmp(a->value.user_name, b->value.user_name); | |
504 | case LTTNG_PROCESS_ATTR_VALUE_TYPE_GROUP_NAME: | |
505 | return !strcmp(a->value.group_name, b->value.group_name); | |
506 | default: | |
507 | abort(); | |
508 | } | |
509 | } | |
f19f5c96 | 510 | |
159b042f JG |
511 | LTTNG_HIDDEN |
512 | void process_attr_value_destroy(struct process_attr_value *value) | |
513 | { | |
514 | if (!value) { | |
515 | return; | |
f19f5c96 | 516 | } |
159b042f JG |
517 | if (is_value_type_name(value->type)) { |
518 | free(value->type == LTTNG_PROCESS_ATTR_VALUE_TYPE_USER_NAME ? | |
519 | value->value.user_name : | |
520 | value->value.group_name); | |
521 | } | |
522 | free(value); | |
f19f5c96 | 523 | } |