Commit | Line | Data |
---|---|---|
b579acd9 DG |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
3 | * | |
d14d33bf AM |
4 | * This program is free software; you can redistribute it and/or modify |
5 | * it under the terms of the GNU General Public License, version 2 only, | |
6 | * as published by the Free Software Foundation. | |
b579acd9 | 7 | * |
d14d33bf AM |
8 | * This program is distributed in the hope that it will be useful, |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
b579acd9 | 12 | * |
d14d33bf AM |
13 | * You should have received a copy of the GNU General Public License along |
14 | * with this program; if not, write to the Free Software Foundation, Inc., | |
15 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
b579acd9 DG |
16 | */ |
17 | ||
18 | #define _GNU_SOURCE | |
19 | #include <stdio.h> | |
20 | #include <stdlib.h> | |
21 | #include <string.h> | |
22 | #include <unistd.h> | |
54d01ffb | 23 | #include <urcu/list.h> |
1e307fab | 24 | |
db758600 | 25 | #include <common/error.h> |
10a8a223 | 26 | #include <common/sessiond-comm/sessiond-comm.h> |
b579acd9 | 27 | |
b579acd9 | 28 | #include "context.h" |
4771f025 | 29 | #include "kernel.h" |
55cc08a6 | 30 | #include "ust-app.h" |
34378f76 | 31 | #include "trace-ust.h" |
b579acd9 DG |
32 | |
33 | /* | |
34 | * Add kernel context to an event of a specific channel. | |
35 | */ | |
36 | static int add_kctx_to_event(struct lttng_kernel_context *kctx, | |
37 | struct ltt_kernel_channel *kchan, char *event_name) | |
38 | { | |
39 | int ret, found = 0; | |
40 | struct ltt_kernel_event *kevent; | |
41 | ||
42 | DBG("Add kernel context to event %s", event_name); | |
43 | ||
62499ad6 | 44 | kevent = trace_kernel_get_event_by_name(event_name, kchan); |
b579acd9 DG |
45 | if (kevent != NULL) { |
46 | ret = kernel_add_event_context(kevent, kctx); | |
47 | if (ret < 0) { | |
48 | goto error; | |
49 | } | |
50 | found = 1; | |
51 | } | |
52 | ||
53 | ret = found; | |
54 | ||
55 | error: | |
56 | return ret; | |
57 | } | |
58 | ||
59 | /* | |
60 | * Add kernel context to all channel. | |
61 | * | |
62 | * If event_name is specified, add context to event instead. | |
63 | */ | |
64 | static int add_kctx_all_channels(struct ltt_kernel_session *ksession, | |
65 | struct lttng_kernel_context *kctx, char *event_name) | |
66 | { | |
67 | int ret, no_event = 0, found = 0; | |
68 | struct ltt_kernel_channel *kchan; | |
69 | ||
70 | if (strlen(event_name) == 0) { | |
71 | no_event = 1; | |
72 | } | |
73 | ||
74 | DBG("Adding kernel context to all channels (event: %s)", event_name); | |
75 | ||
76 | /* Go over all channels */ | |
77 | cds_list_for_each_entry(kchan, &ksession->channel_list.head, list) { | |
78 | if (no_event) { | |
79 | ret = kernel_add_channel_context(kchan, kctx); | |
80 | if (ret < 0) { | |
f73fabfd | 81 | ret = LTTNG_ERR_KERN_CONTEXT_FAIL; |
b579acd9 DG |
82 | goto error; |
83 | } | |
84 | } else { | |
85 | ret = add_kctx_to_event(kctx, kchan, event_name); | |
86 | if (ret < 0) { | |
f73fabfd | 87 | ret = LTTNG_ERR_KERN_CONTEXT_FAIL; |
b579acd9 DG |
88 | goto error; |
89 | } else if (ret == 1) { | |
90 | /* Event found and context added */ | |
91 | found = 1; | |
92 | break; | |
93 | } | |
94 | } | |
95 | } | |
96 | ||
97 | if (!found && !no_event) { | |
f73fabfd | 98 | ret = LTTNG_ERR_NO_EVENT; |
b579acd9 DG |
99 | goto error; |
100 | } | |
101 | ||
f73fabfd | 102 | ret = LTTNG_OK; |
b579acd9 DG |
103 | |
104 | error: | |
105 | return ret; | |
106 | } | |
107 | ||
108 | /* | |
109 | * Add kernel context to a specific channel. | |
110 | * | |
111 | * If event_name is specified, add context to that event. | |
112 | */ | |
113 | static int add_kctx_to_channel(struct lttng_kernel_context *kctx, | |
114 | struct ltt_kernel_channel *kchan, char *event_name) | |
115 | { | |
116 | int ret, no_event = 0, found = 0; | |
117 | ||
118 | if (strlen(event_name) == 0) { | |
119 | no_event = 1; | |
120 | } | |
121 | ||
122 | DBG("Add kernel context to channel '%s', event '%s'", | |
123 | kchan->channel->name, event_name); | |
124 | ||
125 | if (no_event) { | |
126 | ret = kernel_add_channel_context(kchan, kctx); | |
127 | if (ret < 0) { | |
f73fabfd | 128 | ret = LTTNG_ERR_KERN_CONTEXT_FAIL; |
b579acd9 DG |
129 | goto error; |
130 | } | |
131 | } else { | |
132 | ret = add_kctx_to_event(kctx, kchan, event_name); | |
133 | if (ret < 0) { | |
f73fabfd | 134 | ret = LTTNG_ERR_KERN_CONTEXT_FAIL; |
b579acd9 DG |
135 | goto error; |
136 | } else if (ret == 1) { | |
137 | /* Event found and context added */ | |
138 | found = 1; | |
139 | } | |
140 | } | |
141 | ||
142 | if (!found && !no_event) { | |
f73fabfd | 143 | ret = LTTNG_ERR_NO_EVENT; |
b579acd9 DG |
144 | goto error; |
145 | } | |
146 | ||
f73fabfd | 147 | ret = LTTNG_OK; |
b579acd9 DG |
148 | |
149 | error: | |
150 | return ret; | |
151 | } | |
152 | ||
6b79ed20 DG |
153 | /* |
154 | * Add UST context to channel. | |
155 | */ | |
156 | static int add_uctx_to_channel(struct ltt_ust_session *usess, int domain, | |
157 | struct ltt_ust_channel *uchan, struct lttng_event_context *ctx) | |
158 | { | |
159 | int ret; | |
160 | struct ltt_ust_context *uctx; | |
727d5404 DG |
161 | struct lttng_ht_iter iter; |
162 | struct lttng_ht_node_ulong *uctx_node; | |
6b79ed20 DG |
163 | |
164 | /* Create ltt UST context */ | |
165 | uctx = trace_ust_create_context(ctx); | |
166 | if (uctx == NULL) { | |
727d5404 | 167 | ret = -EINVAL; |
6b79ed20 DG |
168 | goto error; |
169 | } | |
170 | ||
171 | switch (domain) { | |
172 | case LTTNG_DOMAIN_UST: | |
173 | ret = ust_app_add_ctx_channel_glb(usess, uchan, uctx); | |
174 | if (ret < 0) { | |
175 | goto error; | |
176 | } | |
177 | break; | |
178 | default: | |
727d5404 DG |
179 | ret = -ENOSYS; |
180 | goto error; | |
181 | } | |
182 | ||
183 | /* Lookup context before adding it */ | |
184 | lttng_ht_lookup(uchan->ctx, (void *)((unsigned long)uctx->ctx.ctx), &iter); | |
185 | uctx_node = lttng_ht_iter_get_node_ulong(&iter); | |
186 | if (uctx_node != NULL) { | |
187 | ret = -EEXIST; | |
6b79ed20 DG |
188 | goto error; |
189 | } | |
190 | ||
191 | /* Add ltt UST context node to ltt UST channel */ | |
bec39940 | 192 | lttng_ht_add_unique_ulong(uchan->ctx, &uctx->node); |
6b79ed20 | 193 | |
727d5404 DG |
194 | DBG("Context UST %d added to channel %s", uctx->ctx.ctx, uchan->name); |
195 | ||
196 | return 0; | |
6b79ed20 DG |
197 | |
198 | error: | |
199 | free(uctx); | |
200 | return ret; | |
201 | } | |
202 | ||
203 | /* | |
204 | * Add UST context to event. | |
205 | */ | |
206 | static int add_uctx_to_event(struct ltt_ust_session *usess, int domain, | |
207 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent, | |
208 | struct lttng_event_context *ctx) | |
209 | { | |
210 | int ret; | |
211 | struct ltt_ust_context *uctx; | |
727d5404 DG |
212 | struct lttng_ht_iter iter; |
213 | struct lttng_ht_node_ulong *uctx_node; | |
6b79ed20 DG |
214 | |
215 | /* Create ltt UST context */ | |
216 | uctx = trace_ust_create_context(ctx); | |
217 | if (uctx == NULL) { | |
727d5404 DG |
218 | /* Context values are invalid. */ |
219 | ret = -EINVAL; | |
6b79ed20 DG |
220 | goto error; |
221 | } | |
222 | ||
223 | switch (domain) { | |
224 | case LTTNG_DOMAIN_UST: | |
225 | ret = ust_app_add_ctx_event_glb(usess, uchan, uevent, uctx); | |
226 | if (ret < 0) { | |
227 | goto error; | |
228 | } | |
229 | break; | |
230 | default: | |
727d5404 DG |
231 | ret = -ENOSYS; |
232 | goto error; | |
233 | } | |
234 | ||
235 | /* Lookup context before adding it */ | |
236 | lttng_ht_lookup(uevent->ctx, (void *)((unsigned long)uctx->ctx.ctx), &iter); | |
237 | uctx_node = lttng_ht_iter_get_node_ulong(&iter); | |
238 | if (uctx_node != NULL) { | |
239 | ret = -EEXIST; | |
6b79ed20 DG |
240 | goto error; |
241 | } | |
242 | ||
243 | /* Add ltt UST context node to ltt UST event */ | |
bec39940 | 244 | lttng_ht_add_unique_ulong(uevent->ctx, &uctx->node); |
6b79ed20 | 245 | |
727d5404 DG |
246 | DBG("Context UST %d added to event %s", uctx->ctx.ctx, uevent->attr.name); |
247 | ||
248 | return 0; | |
6b79ed20 DG |
249 | |
250 | error: | |
251 | free(uctx); | |
252 | return ret; | |
253 | } | |
254 | ||
b579acd9 DG |
255 | /* |
256 | * Add kernel context to tracer. | |
257 | */ | |
54d01ffb DG |
258 | int context_kernel_add(struct ltt_kernel_session *ksession, |
259 | struct lttng_event_context *ctx, char *event_name, | |
b579acd9 DG |
260 | char *channel_name) |
261 | { | |
262 | int ret; | |
263 | struct ltt_kernel_channel *kchan; | |
54d01ffb DG |
264 | struct lttng_kernel_context kctx; |
265 | ||
266 | /* Setup kernel context structure */ | |
9197c5c4 MD |
267 | switch (ctx->ctx) { |
268 | case LTTNG_EVENT_CONTEXT_PID: | |
269 | kctx.ctx = LTTNG_KERNEL_CONTEXT_PID; | |
270 | break; | |
271 | case LTTNG_EVENT_CONTEXT_PERF_COUNTER: | |
272 | kctx.ctx = LTTNG_KERNEL_CONTEXT_PERF_COUNTER; | |
273 | break; | |
274 | case LTTNG_EVENT_CONTEXT_PROCNAME: | |
275 | kctx.ctx = LTTNG_KERNEL_CONTEXT_PROCNAME; | |
276 | break; | |
277 | case LTTNG_EVENT_CONTEXT_PRIO: | |
278 | kctx.ctx = LTTNG_KERNEL_CONTEXT_PRIO; | |
279 | break; | |
280 | case LTTNG_EVENT_CONTEXT_NICE: | |
281 | kctx.ctx = LTTNG_KERNEL_CONTEXT_NICE; | |
282 | break; | |
283 | case LTTNG_EVENT_CONTEXT_VPID: | |
284 | kctx.ctx = LTTNG_KERNEL_CONTEXT_VPID; | |
285 | break; | |
286 | case LTTNG_EVENT_CONTEXT_TID: | |
287 | kctx.ctx = LTTNG_KERNEL_CONTEXT_TID; | |
288 | break; | |
289 | case LTTNG_EVENT_CONTEXT_VTID: | |
290 | kctx.ctx = LTTNG_KERNEL_CONTEXT_VTID; | |
291 | break; | |
292 | case LTTNG_EVENT_CONTEXT_PPID: | |
293 | kctx.ctx = LTTNG_KERNEL_CONTEXT_PPID; | |
294 | break; | |
295 | case LTTNG_EVENT_CONTEXT_VPPID: | |
296 | kctx.ctx = LTTNG_KERNEL_CONTEXT_VPPID; | |
297 | break; | |
54773d68 JD |
298 | case LTTNG_EVENT_CONTEXT_HOSTNAME: |
299 | kctx.ctx = LTTNG_KERNEL_CONTEXT_HOSTNAME; | |
300 | break; | |
9197c5c4 | 301 | default: |
f73fabfd | 302 | return LTTNG_ERR_KERN_CONTEXT_FAIL; |
9197c5c4 MD |
303 | } |
304 | ||
54d01ffb DG |
305 | kctx.u.perf_counter.type = ctx->u.perf_counter.type; |
306 | kctx.u.perf_counter.config = ctx->u.perf_counter.config; | |
307 | strncpy(kctx.u.perf_counter.name, ctx->u.perf_counter.name, | |
308 | LTTNG_SYMBOL_NAME_LEN); | |
309 | kctx.u.perf_counter.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
b579acd9 DG |
310 | |
311 | if (strlen(channel_name) == 0) { | |
54d01ffb | 312 | ret = add_kctx_all_channels(ksession, &kctx, event_name); |
f73fabfd | 313 | if (ret != LTTNG_OK) { |
b579acd9 DG |
314 | goto error; |
315 | } | |
316 | } else { | |
317 | /* Get kernel channel */ | |
62499ad6 | 318 | kchan = trace_kernel_get_channel_by_name(channel_name, ksession); |
b579acd9 | 319 | if (kchan == NULL) { |
f73fabfd | 320 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
b579acd9 DG |
321 | goto error; |
322 | } | |
323 | ||
54d01ffb | 324 | ret = add_kctx_to_channel(&kctx, kchan, event_name); |
f73fabfd | 325 | if (ret != LTTNG_OK) { |
b579acd9 DG |
326 | goto error; |
327 | } | |
328 | } | |
329 | ||
f73fabfd | 330 | ret = LTTNG_OK; |
b579acd9 DG |
331 | |
332 | error: | |
333 | return ret; | |
334 | } | |
2bdd86d4 MD |
335 | |
336 | /* | |
55cc08a6 | 337 | * Add UST context to tracer. |
2bdd86d4 | 338 | */ |
55cc08a6 DG |
339 | int context_ust_add(struct ltt_ust_session *usess, int domain, |
340 | struct lttng_event_context *ctx, char *event_name, | |
341 | char *channel_name) | |
2bdd86d4 | 342 | { |
f73fabfd | 343 | int ret = LTTNG_OK, have_event = 0; |
442359c0 | 344 | struct lttng_ht_iter iter; |
bec39940 | 345 | struct lttng_ht *chan_ht; |
55cc08a6 DG |
346 | struct ltt_ust_channel *uchan = NULL; |
347 | struct ltt_ust_event *uevent = NULL; | |
2bdd86d4 | 348 | |
6b79ed20 DG |
349 | /* |
350 | * Define which channel's hashtable to use from the domain or quit if | |
351 | * unknown domain. | |
352 | */ | |
55cc08a6 DG |
353 | switch (domain) { |
354 | case LTTNG_DOMAIN_UST: | |
355 | chan_ht = usess->domain_global.channels; | |
356 | break; | |
d78d6610 | 357 | #if 0 |
55cc08a6 DG |
358 | case LTTNG_DOMAIN_UST_EXEC_NAME: |
359 | case LTTNG_DOMAIN_UST_PID: | |
360 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
d78d6610 | 361 | #endif |
55cc08a6 | 362 | default: |
f73fabfd | 363 | ret = LTTNG_ERR_UND; |
2bdd86d4 MD |
364 | goto error; |
365 | } | |
2bdd86d4 | 366 | |
6b79ed20 | 367 | /* Do we have an event name */ |
55cc08a6 DG |
368 | if (strlen(event_name) != 0) { |
369 | have_event = 1; | |
2bdd86d4 MD |
370 | } |
371 | ||
55cc08a6 DG |
372 | /* Get UST channel if defined */ |
373 | if (strlen(channel_name) != 0) { | |
374 | uchan = trace_ust_find_channel_by_name(chan_ht, channel_name); | |
375 | if (uchan == NULL) { | |
f73fabfd | 376 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2bdd86d4 MD |
377 | goto error; |
378 | } | |
55cc08a6 DG |
379 | } |
380 | ||
381 | /* If UST channel specified and event name, get UST event ref */ | |
382 | if (uchan && have_event) { | |
383 | uevent = trace_ust_find_event_by_name(uchan->events, event_name); | |
384 | if (uevent == NULL) { | |
f73fabfd | 385 | ret = LTTNG_ERR_UST_EVENT_NOT_FOUND; |
2bdd86d4 | 386 | goto error; |
2bdd86d4 MD |
387 | } |
388 | } | |
389 | ||
55cc08a6 DG |
390 | /* At this point, we have 4 possibilities */ |
391 | ||
6b79ed20 DG |
392 | if (uchan && uevent) { /* Add ctx to event in channel */ |
393 | ret = add_uctx_to_event(usess, domain, uchan, uevent, ctx); | |
55cc08a6 | 394 | } else if (uchan && !have_event) { /* Add ctx to channel */ |
6b79ed20 | 395 | ret = add_uctx_to_channel(usess, domain, uchan, ctx); |
55cc08a6 | 396 | } else if (!uchan && have_event) { /* Add ctx to event */ |
6b79ed20 | 397 | /* Add context to event without having the channel name */ |
bec39940 | 398 | cds_lfht_for_each_entry(chan_ht->ht, &iter.iter, uchan, node.node) { |
55cc08a6 DG |
399 | uevent = trace_ust_find_event_by_name(uchan->events, event_name); |
400 | if (uevent != NULL) { | |
6b79ed20 | 401 | ret = add_uctx_to_event(usess, domain, uchan, uevent, ctx); |
55cc08a6 DG |
402 | /* |
403 | * LTTng UST does not allowed the same event to be registered | |
404 | * multiple time in different or the same channel. So, if we | |
6b79ed20 | 405 | * found our event, we stop. |
55cc08a6 DG |
406 | */ |
407 | goto end; | |
408 | } | |
2bdd86d4 | 409 | } |
f73fabfd | 410 | ret = LTTNG_ERR_UST_EVENT_NOT_FOUND; |
6b79ed20 DG |
411 | goto error; |
412 | } else if (!uchan && !have_event) { /* Add ctx all events, all channels */ | |
413 | /* For all channels */ | |
bec39940 | 414 | cds_lfht_for_each_entry(chan_ht->ht, &iter.iter, uchan, node.node) { |
6b79ed20 | 415 | ret = add_uctx_to_channel(usess, domain, uchan, ctx); |
55cc08a6 | 416 | if (ret < 0) { |
ae856491 | 417 | ERR("Context failed for channel %s", uchan->name); |
55cc08a6 DG |
418 | continue; |
419 | } | |
2bdd86d4 | 420 | } |
55cc08a6 | 421 | } |
2bdd86d4 | 422 | |
55cc08a6 DG |
423 | end: |
424 | switch (ret) { | |
425 | case -EEXIST: | |
f73fabfd | 426 | ret = LTTNG_ERR_UST_CONTEXT_EXIST; |
727d5404 | 427 | break; |
55cc08a6 | 428 | case -ENOMEM: |
f73fabfd | 429 | ret = LTTNG_ERR_FATAL; |
727d5404 DG |
430 | break; |
431 | case -EINVAL: | |
f73fabfd | 432 | ret = LTTNG_ERR_UST_CONTEXT_INVAL; |
727d5404 DG |
433 | break; |
434 | case -ENOSYS: | |
f73fabfd | 435 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
727d5404 DG |
436 | break; |
437 | default: | |
f73fabfd | 438 | ret = LTTNG_OK; |
727d5404 | 439 | break; |
2bdd86d4 MD |
440 | } |
441 | ||
2bdd86d4 MD |
442 | error: |
443 | return ret; | |
444 | } |