Commit | Line | Data |
---|---|---|
b579acd9 | 1 | /* |
ab5be9fa MJ |
2 | * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca> |
3 | * Copyright (C) 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
b579acd9 | 4 | * |
ab5be9fa | 5 | * SPDX-License-Identifier: GPL-2.0-only |
b579acd9 | 6 | * |
b579acd9 DG |
7 | */ |
8 | ||
6c1c0768 | 9 | #define _LGPL_SOURCE |
b579acd9 DG |
10 | #include <stdio.h> |
11 | #include <stdlib.h> | |
12 | #include <string.h> | |
13 | #include <unistd.h> | |
54d01ffb | 14 | #include <urcu/list.h> |
1e307fab | 15 | |
db758600 | 16 | #include <common/error.h> |
10a8a223 | 17 | #include <common/sessiond-comm/sessiond-comm.h> |
b579acd9 | 18 | |
b579acd9 | 19 | #include "context.h" |
4771f025 | 20 | #include "kernel.h" |
55cc08a6 | 21 | #include "ust-app.h" |
34378f76 | 22 | #include "trace-ust.h" |
bdf64013 | 23 | #include "agent.h" |
b579acd9 | 24 | |
b579acd9 DG |
25 | /* |
26 | * Add kernel context to all channel. | |
df3c77c8 JG |
27 | * |
28 | * Assumes the ownership of kctx. | |
b579acd9 DG |
29 | */ |
30 | static int add_kctx_all_channels(struct ltt_kernel_session *ksession, | |
645328ae | 31 | struct ltt_kernel_context *kctx) |
b579acd9 | 32 | { |
601d5acf | 33 | int ret; |
b579acd9 DG |
34 | struct ltt_kernel_channel *kchan; |
35 | ||
0525e9ae DG |
36 | assert(ksession); |
37 | assert(kctx); | |
38 | ||
601d5acf | 39 | DBG("Adding kernel context to all channels"); |
b579acd9 DG |
40 | |
41 | /* Go over all channels */ | |
42 | cds_list_for_each_entry(kchan, &ksession->channel_list.head, list) { | |
df3c77c8 JG |
43 | struct ltt_kernel_context *kctx_copy; |
44 | ||
45 | kctx_copy = trace_kernel_copy_context(kctx); | |
46 | if (!kctx_copy) { | |
47 | PERROR("zmalloc ltt_kernel_context"); | |
7682f304 | 48 | ret = -LTTNG_ERR_NOMEM; |
df3c77c8 JG |
49 | goto error; |
50 | } | |
51 | ||
52 | /* Ownership of kctx_copy is transferred to the callee. */ | |
53 | ret = kernel_add_channel_context(kchan, kctx_copy); | |
54 | kctx_copy = NULL; | |
1ae5e83e | 55 | if (ret != 0) { |
601d5acf | 56 | goto error; |
b579acd9 DG |
57 | } |
58 | } | |
59 | ||
f73fabfd | 60 | ret = LTTNG_OK; |
b579acd9 DG |
61 | |
62 | error: | |
df3c77c8 | 63 | trace_kernel_destroy_context(kctx); |
b579acd9 DG |
64 | return ret; |
65 | } | |
66 | ||
67 | /* | |
68 | * Add kernel context to a specific channel. | |
df3c77c8 JG |
69 | * |
70 | * Assumes the ownership of kctx. | |
b579acd9 | 71 | */ |
645328ae | 72 | static int add_kctx_to_channel(struct ltt_kernel_context *kctx, |
601d5acf | 73 | struct ltt_kernel_channel *kchan) |
b579acd9 | 74 | { |
601d5acf | 75 | int ret; |
b579acd9 | 76 | |
0525e9ae DG |
77 | assert(kchan); |
78 | assert(kctx); | |
79 | ||
601d5acf | 80 | DBG("Add kernel context to channel '%s'", kchan->channel->name); |
b579acd9 | 81 | |
df3c77c8 | 82 | /* Ownership of kctx is transferred to the callee. */ |
601d5acf | 83 | ret = kernel_add_channel_context(kchan, kctx); |
df3c77c8 | 84 | kctx = NULL; |
1ae5e83e | 85 | if (ret != 0) { |
b579acd9 DG |
86 | goto error; |
87 | } | |
88 | ||
f73fabfd | 89 | ret = LTTNG_OK; |
b579acd9 DG |
90 | |
91 | error: | |
92 | return ret; | |
93 | } | |
94 | ||
6b79ed20 DG |
95 | /* |
96 | * Add UST context to channel. | |
97 | */ | |
4ce7709b JG |
98 | static int add_uctx_to_channel(struct ltt_ust_session *usess, |
99 | enum lttng_domain_type domain, | |
df4f5a87 JG |
100 | struct ltt_ust_channel *uchan, |
101 | const struct lttng_event_context *ctx) | |
6b79ed20 DG |
102 | { |
103 | int ret; | |
bdf64013 | 104 | struct ltt_ust_context *uctx = NULL; |
6b79ed20 | 105 | |
0525e9ae DG |
106 | assert(usess); |
107 | assert(uchan); | |
108 | assert(ctx); | |
109 | ||
aa3514e9 MD |
110 | /* Check if context is duplicate */ |
111 | cds_list_for_each_entry(uctx, &uchan->ctx_list, list) { | |
112 | if (trace_ust_match_context(uctx, ctx)) { | |
7682f304 | 113 | ret = LTTNG_ERR_UST_CONTEXT_EXIST; |
aa3514e9 MD |
114 | goto duplicate; |
115 | } | |
116 | } | |
bdf64013 JG |
117 | uctx = NULL; |
118 | ||
119 | switch (domain) { | |
120 | case LTTNG_DOMAIN_JUL: | |
121 | case LTTNG_DOMAIN_LOG4J: | |
122 | { | |
442f8c07 JG |
123 | struct agent *agt; |
124 | ||
125 | if (ctx->ctx != LTTNG_EVENT_CONTEXT_APP_CONTEXT) { | |
126 | /* Other contexts are not needed by the agent. */ | |
127 | break; | |
128 | } | |
129 | agt = trace_ust_find_agent(usess, domain); | |
bdf64013 JG |
130 | |
131 | if (!agt) { | |
132 | agt = agent_create(domain); | |
133 | if (!agt) { | |
7682f304 | 134 | ret = -LTTNG_ERR_NOMEM; |
bdf64013 JG |
135 | goto error; |
136 | } | |
137 | agent_add(agt, usess->agents); | |
138 | } | |
139 | ret = agent_add_context(ctx, agt); | |
140 | if (ret != LTTNG_OK) { | |
141 | goto error; | |
142 | } | |
143 | ||
144 | ret = agent_enable_context(ctx, domain); | |
145 | if (ret != LTTNG_OK) { | |
146 | goto error; | |
147 | } | |
148 | break; | |
149 | } | |
150 | case LTTNG_DOMAIN_UST: | |
151 | break; | |
152 | default: | |
153 | assert(0); | |
154 | } | |
aa3514e9 | 155 | |
6b79ed20 DG |
156 | /* Create ltt UST context */ |
157 | uctx = trace_ust_create_context(ctx); | |
158 | if (uctx == NULL) { | |
7682f304 | 159 | ret = LTTNG_ERR_UST_CONTEXT_INVAL; |
6b79ed20 DG |
160 | goto error; |
161 | } | |
162 | ||
6b79ed20 | 163 | /* Add ltt UST context node to ltt UST channel */ |
aa3514e9 | 164 | lttng_ht_add_ulong(uchan->ctx, &uctx->node); |
31746f93 | 165 | cds_list_add_tail(&uctx->list, &uchan->ctx_list); |
6b79ed20 | 166 | |
88e3c2f5 JG |
167 | if (!usess->active) { |
168 | goto end; | |
169 | } | |
170 | ||
171 | ret = ust_app_add_ctx_channel_glb(usess, uchan, uctx); | |
172 | if (ret < 0) { | |
173 | goto error; | |
174 | } | |
175 | end: | |
727d5404 DG |
176 | DBG("Context UST %d added to channel %s", uctx->ctx.ctx, uchan->name); |
177 | ||
178 | return 0; | |
6b79ed20 DG |
179 | |
180 | error: | |
181 | free(uctx); | |
aa3514e9 | 182 | duplicate: |
6b79ed20 DG |
183 | return ret; |
184 | } | |
185 | ||
b579acd9 DG |
186 | /* |
187 | * Add kernel context to tracer. | |
188 | */ | |
54d01ffb | 189 | int context_kernel_add(struct ltt_kernel_session *ksession, |
df4f5a87 | 190 | const struct lttng_event_context *ctx, char *channel_name) |
b579acd9 DG |
191 | { |
192 | int ret; | |
193 | struct ltt_kernel_channel *kchan; | |
645328ae | 194 | struct ltt_kernel_context *kctx; |
54d01ffb | 195 | |
0525e9ae DG |
196 | assert(ksession); |
197 | assert(ctx); | |
198 | assert(channel_name); | |
199 | ||
645328ae DG |
200 | kctx = trace_kernel_create_context(NULL); |
201 | if (!kctx) { | |
7682f304 | 202 | ret = -LTTNG_ERR_NOMEM; |
645328ae DG |
203 | goto error; |
204 | } | |
205 | ||
54d01ffb | 206 | /* Setup kernel context structure */ |
9197c5c4 MD |
207 | switch (ctx->ctx) { |
208 | case LTTNG_EVENT_CONTEXT_PID: | |
645328ae | 209 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_PID; |
9197c5c4 | 210 | break; |
9197c5c4 | 211 | case LTTNG_EVENT_CONTEXT_PROCNAME: |
645328ae | 212 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_PROCNAME; |
9197c5c4 MD |
213 | break; |
214 | case LTTNG_EVENT_CONTEXT_PRIO: | |
645328ae | 215 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_PRIO; |
9197c5c4 MD |
216 | break; |
217 | case LTTNG_EVENT_CONTEXT_NICE: | |
645328ae | 218 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_NICE; |
9197c5c4 MD |
219 | break; |
220 | case LTTNG_EVENT_CONTEXT_VPID: | |
645328ae | 221 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_VPID; |
9197c5c4 MD |
222 | break; |
223 | case LTTNG_EVENT_CONTEXT_TID: | |
645328ae | 224 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_TID; |
9197c5c4 MD |
225 | break; |
226 | case LTTNG_EVENT_CONTEXT_VTID: | |
645328ae | 227 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_VTID; |
9197c5c4 MD |
228 | break; |
229 | case LTTNG_EVENT_CONTEXT_PPID: | |
645328ae | 230 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_PPID; |
9197c5c4 MD |
231 | break; |
232 | case LTTNG_EVENT_CONTEXT_VPPID: | |
645328ae | 233 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_VPPID; |
9197c5c4 | 234 | break; |
54773d68 | 235 | case LTTNG_EVENT_CONTEXT_HOSTNAME: |
645328ae | 236 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_HOSTNAME; |
54773d68 | 237 | break; |
aa3514e9 MD |
238 | case LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER: |
239 | case LTTNG_EVENT_CONTEXT_PERF_COUNTER: | |
645328ae | 240 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_PERF_CPU_COUNTER; |
aa3514e9 | 241 | break; |
1ae5e83e JD |
242 | case LTTNG_EVENT_CONTEXT_INTERRUPTIBLE: |
243 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_INTERRUPTIBLE; | |
244 | break; | |
245 | case LTTNG_EVENT_CONTEXT_PREEMPTIBLE: | |
246 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_PREEMPTIBLE; | |
247 | break; | |
248 | case LTTNG_EVENT_CONTEXT_NEED_RESCHEDULE: | |
249 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_NEED_RESCHEDULE; | |
250 | break; | |
251 | case LTTNG_EVENT_CONTEXT_MIGRATABLE: | |
252 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_MIGRATABLE; | |
253 | break; | |
373148e9 FG |
254 | case LTTNG_EVENT_CONTEXT_CALLSTACK_KERNEL: |
255 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_CALLSTACK_KERNEL; | |
256 | break; | |
257 | case LTTNG_EVENT_CONTEXT_CALLSTACK_USER: | |
258 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_CALLSTACK_USER; | |
259 | break; | |
40e14884 MJ |
260 | case LTTNG_EVENT_CONTEXT_CGROUP_NS: |
261 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_CGROUP_NS; | |
262 | break; | |
263 | case LTTNG_EVENT_CONTEXT_IPC_NS: | |
264 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_IPC_NS; | |
265 | break; | |
266 | case LTTNG_EVENT_CONTEXT_MNT_NS: | |
267 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_MNT_NS; | |
268 | break; | |
269 | case LTTNG_EVENT_CONTEXT_NET_NS: | |
270 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_NET_NS; | |
271 | break; | |
272 | case LTTNG_EVENT_CONTEXT_PID_NS: | |
273 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_PID_NS; | |
274 | break; | |
275 | case LTTNG_EVENT_CONTEXT_USER_NS: | |
276 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_USER_NS; | |
277 | break; | |
278 | case LTTNG_EVENT_CONTEXT_UTS_NS: | |
279 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_UTS_NS; | |
280 | break; | |
499cbfa1 MJ |
281 | case LTTNG_EVENT_CONTEXT_UID: |
282 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_UID; | |
283 | break; | |
284 | case LTTNG_EVENT_CONTEXT_EUID: | |
285 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_EUID; | |
286 | break; | |
287 | case LTTNG_EVENT_CONTEXT_SUID: | |
288 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_SUID; | |
289 | break; | |
290 | case LTTNG_EVENT_CONTEXT_GID: | |
291 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_GID; | |
292 | break; | |
293 | case LTTNG_EVENT_CONTEXT_EGID: | |
294 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_EGID; | |
295 | break; | |
296 | case LTTNG_EVENT_CONTEXT_SGID: | |
297 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_SGID; | |
298 | break; | |
299 | case LTTNG_EVENT_CONTEXT_VUID: | |
300 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_VUID; | |
301 | break; | |
302 | case LTTNG_EVENT_CONTEXT_VEUID: | |
303 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_VEUID; | |
304 | break; | |
305 | case LTTNG_EVENT_CONTEXT_VSUID: | |
306 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_VSUID; | |
307 | break; | |
308 | case LTTNG_EVENT_CONTEXT_VGID: | |
309 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_VGID; | |
310 | break; | |
311 | case LTTNG_EVENT_CONTEXT_VEGID: | |
312 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_VEGID; | |
313 | break; | |
314 | case LTTNG_EVENT_CONTEXT_VSGID: | |
315 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_VSGID; | |
316 | break; | |
9197c5c4 | 317 | default: |
fc7324e8 DG |
318 | ret = LTTNG_ERR_KERN_CONTEXT_FAIL; |
319 | goto error; | |
9197c5c4 MD |
320 | } |
321 | ||
645328ae DG |
322 | kctx->ctx.u.perf_counter.type = ctx->u.perf_counter.type; |
323 | kctx->ctx.u.perf_counter.config = ctx->u.perf_counter.config; | |
324 | strncpy(kctx->ctx.u.perf_counter.name, ctx->u.perf_counter.name, | |
54d01ffb | 325 | LTTNG_SYMBOL_NAME_LEN); |
645328ae | 326 | kctx->ctx.u.perf_counter.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; |
b579acd9 | 327 | |
9d035200 | 328 | if (*channel_name == '\0') { |
645328ae | 329 | ret = add_kctx_all_channels(ksession, kctx); |
df3c77c8 JG |
330 | /* Ownership of kctx is transferred to the callee. */ |
331 | kctx = NULL; | |
f73fabfd | 332 | if (ret != LTTNG_OK) { |
b579acd9 DG |
333 | goto error; |
334 | } | |
335 | } else { | |
336 | /* Get kernel channel */ | |
62499ad6 | 337 | kchan = trace_kernel_get_channel_by_name(channel_name, ksession); |
b579acd9 | 338 | if (kchan == NULL) { |
f73fabfd | 339 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
b579acd9 DG |
340 | goto error; |
341 | } | |
342 | ||
645328ae | 343 | ret = add_kctx_to_channel(kctx, kchan); |
df3c77c8 JG |
344 | /* Ownership of kctx is transferred to the callee. */ |
345 | kctx = NULL; | |
f73fabfd | 346 | if (ret != LTTNG_OK) { |
b579acd9 DG |
347 | goto error; |
348 | } | |
349 | } | |
350 | ||
df3c77c8 | 351 | ret = LTTNG_OK; |
b579acd9 DG |
352 | |
353 | error: | |
fc7324e8 DG |
354 | if (kctx) { |
355 | trace_kernel_destroy_context(kctx); | |
356 | } | |
b579acd9 DG |
357 | return ret; |
358 | } | |
2bdd86d4 MD |
359 | |
360 | /* | |
55cc08a6 | 361 | * Add UST context to tracer. |
2bdd86d4 | 362 | */ |
4ce7709b | 363 | int context_ust_add(struct ltt_ust_session *usess, |
df4f5a87 JG |
364 | enum lttng_domain_type domain, |
365 | const struct lttng_event_context *ctx, | |
4ce7709b | 366 | char *channel_name) |
2bdd86d4 | 367 | { |
601d5acf | 368 | int ret = LTTNG_OK; |
442359c0 | 369 | struct lttng_ht_iter iter; |
bec39940 | 370 | struct lttng_ht *chan_ht; |
55cc08a6 | 371 | struct ltt_ust_channel *uchan = NULL; |
2bdd86d4 | 372 | |
0525e9ae DG |
373 | assert(usess); |
374 | assert(ctx); | |
375 | assert(channel_name); | |
376 | ||
2223c96f DG |
377 | rcu_read_lock(); |
378 | ||
f5501dad | 379 | chan_ht = usess->domain_global.channels; |
2bdd86d4 | 380 | |
55cc08a6 | 381 | /* Get UST channel if defined */ |
9f9ee9c9 | 382 | if (channel_name[0] != '\0') { |
55cc08a6 DG |
383 | uchan = trace_ust_find_channel_by_name(chan_ht, channel_name); |
384 | if (uchan == NULL) { | |
f73fabfd | 385 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2bdd86d4 MD |
386 | goto error; |
387 | } | |
55cc08a6 DG |
388 | } |
389 | ||
601d5acf DG |
390 | if (uchan) { |
391 | /* Add ctx to channel */ | |
6b79ed20 | 392 | ret = add_uctx_to_channel(usess, domain, uchan, ctx); |
601d5acf | 393 | } else { |
e7fe706f | 394 | rcu_read_lock(); |
601d5acf | 395 | /* Add ctx all events, all channels */ |
bec39940 | 396 | cds_lfht_for_each_entry(chan_ht->ht, &iter.iter, uchan, node.node) { |
6b79ed20 | 397 | ret = add_uctx_to_channel(usess, domain, uchan, ctx); |
7682f304 | 398 | if (ret) { |
9589be74 JG |
399 | ERR("Failed to add context to channel %s", |
400 | uchan->name); | |
55cc08a6 DG |
401 | continue; |
402 | } | |
2bdd86d4 | 403 | } |
e7fe706f | 404 | rcu_read_unlock(); |
55cc08a6 | 405 | } |
2bdd86d4 | 406 | |
55cc08a6 | 407 | switch (ret) { |
7682f304 | 408 | case LTTNG_ERR_UST_CONTEXT_EXIST: |
727d5404 | 409 | break; |
55cc08a6 | 410 | case -ENOMEM: |
7682f304 | 411 | case -LTTNG_ERR_NOMEM: |
f73fabfd | 412 | ret = LTTNG_ERR_FATAL; |
727d5404 DG |
413 | break; |
414 | case -EINVAL: | |
f73fabfd | 415 | ret = LTTNG_ERR_UST_CONTEXT_INVAL; |
727d5404 DG |
416 | break; |
417 | case -ENOSYS: | |
f73fabfd | 418 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
727d5404 DG |
419 | break; |
420 | default: | |
7682f304 JG |
421 | if (ret != 0 && ret != LTTNG_OK) { |
422 | ret = ret > 0 ? ret : LTTNG_ERR_UNK; | |
423 | } else { | |
424 | ret = LTTNG_OK; | |
425 | } | |
727d5404 | 426 | break; |
2bdd86d4 MD |
427 | } |
428 | ||
2bdd86d4 | 429 | error: |
2223c96f | 430 | rcu_read_unlock(); |
2bdd86d4 MD |
431 | return ret; |
432 | } |