Commit | Line | Data |
---|---|---|
b579acd9 | 1 | /* |
21cf9b6b | 2 | * Copyright (C) 2011 EfficiOS Inc. |
ab5be9fa | 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 |
28ab034a JG |
10 | #include "agent.hpp" |
11 | #include "context.hpp" | |
12 | #include "kernel.hpp" | |
13 | #include "trace-ust.hpp" | |
14 | #include "ust-app.hpp" | |
15 | ||
16 | #include <common/error.hpp> | |
17 | #include <common/sessiond-comm/sessiond-comm.hpp> | |
18 | ||
b579acd9 DG |
19 | #include <stdio.h> |
20 | #include <stdlib.h> | |
21 | #include <string.h> | |
22 | #include <unistd.h> | |
54d01ffb | 23 | #include <urcu/list.h> |
1e307fab | 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, | |
28ab034a | 31 | struct ltt_kernel_context *kctx) |
b579acd9 | 32 | { |
601d5acf | 33 | int ret; |
b579acd9 DG |
34 | struct ltt_kernel_channel *kchan; |
35 | ||
a0377dfe FD |
36 | LTTNG_ASSERT(ksession); |
37 | LTTNG_ASSERT(kctx); | |
0525e9ae | 38 | |
601d5acf | 39 | DBG("Adding kernel context to all channels"); |
b579acd9 DG |
40 | |
41 | /* Go over all channels */ | |
28ab034a | 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 | */ |
28ab034a | 72 | static int add_kctx_to_channel(struct ltt_kernel_context *kctx, struct ltt_kernel_channel *kchan) |
b579acd9 | 73 | { |
601d5acf | 74 | int ret; |
b579acd9 | 75 | |
a0377dfe FD |
76 | LTTNG_ASSERT(kchan); |
77 | LTTNG_ASSERT(kctx); | |
0525e9ae | 78 | |
601d5acf | 79 | DBG("Add kernel context to channel '%s'", kchan->channel->name); |
b579acd9 | 80 | |
df3c77c8 | 81 | /* Ownership of kctx is transferred to the callee. */ |
601d5acf | 82 | ret = kernel_add_channel_context(kchan, kctx); |
df3c77c8 | 83 | kctx = NULL; |
1ae5e83e | 84 | if (ret != 0) { |
b579acd9 DG |
85 | goto error; |
86 | } | |
87 | ||
f73fabfd | 88 | ret = LTTNG_OK; |
b579acd9 DG |
89 | |
90 | error: | |
91 | return ret; | |
92 | } | |
93 | ||
6b79ed20 DG |
94 | /* |
95 | * Add UST context to channel. | |
96 | */ | |
4ce7709b | 97 | static int add_uctx_to_channel(struct ltt_ust_session *usess, |
28ab034a JG |
98 | enum lttng_domain_type domain, |
99 | struct ltt_ust_channel *uchan, | |
100 | const struct lttng_event_context *ctx) | |
6b79ed20 DG |
101 | { |
102 | int ret; | |
bdf64013 | 103 | struct ltt_ust_context *uctx = NULL; |
6b79ed20 | 104 | |
a0377dfe FD |
105 | LTTNG_ASSERT(usess); |
106 | LTTNG_ASSERT(uchan); | |
107 | LTTNG_ASSERT(ctx); | |
0525e9ae | 108 | |
aa3514e9 | 109 | /* Check if context is duplicate */ |
28ab034a | 110 | cds_list_for_each_entry (uctx, &uchan->ctx_list, list) { |
aa3514e9 | 111 | if (trace_ust_match_context(uctx, ctx)) { |
7682f304 | 112 | ret = LTTNG_ERR_UST_CONTEXT_EXIST; |
aa3514e9 MD |
113 | goto duplicate; |
114 | } | |
115 | } | |
bdf64013 JG |
116 | uctx = NULL; |
117 | ||
118 | switch (domain) { | |
119 | case LTTNG_DOMAIN_JUL: | |
120 | case LTTNG_DOMAIN_LOG4J: | |
121 | { | |
442f8c07 JG |
122 | struct agent *agt; |
123 | ||
124 | if (ctx->ctx != LTTNG_EVENT_CONTEXT_APP_CONTEXT) { | |
125 | /* Other contexts are not needed by the agent. */ | |
126 | break; | |
127 | } | |
128 | agt = trace_ust_find_agent(usess, domain); | |
bdf64013 JG |
129 | |
130 | if (!agt) { | |
131 | agt = agent_create(domain); | |
132 | if (!agt) { | |
7682f304 | 133 | ret = -LTTNG_ERR_NOMEM; |
bdf64013 JG |
134 | goto error; |
135 | } | |
136 | agent_add(agt, usess->agents); | |
137 | } | |
138 | ret = agent_add_context(ctx, agt); | |
139 | if (ret != LTTNG_OK) { | |
140 | goto error; | |
141 | } | |
142 | ||
143 | ret = agent_enable_context(ctx, domain); | |
144 | if (ret != LTTNG_OK) { | |
145 | goto error; | |
146 | } | |
147 | break; | |
148 | } | |
149 | case LTTNG_DOMAIN_UST: | |
150 | break; | |
151 | default: | |
a0377dfe | 152 | abort(); |
bdf64013 | 153 | } |
aa3514e9 | 154 | |
6b79ed20 DG |
155 | /* Create ltt UST context */ |
156 | uctx = trace_ust_create_context(ctx); | |
157 | if (uctx == NULL) { | |
7682f304 | 158 | ret = LTTNG_ERR_UST_CONTEXT_INVAL; |
6b79ed20 DG |
159 | goto error; |
160 | } | |
161 | ||
6b79ed20 | 162 | /* Add ltt UST context node to ltt UST channel */ |
aa3514e9 | 163 | lttng_ht_add_ulong(uchan->ctx, &uctx->node); |
31746f93 | 164 | cds_list_add_tail(&uctx->list, &uchan->ctx_list); |
6b79ed20 | 165 | |
88e3c2f5 JG |
166 | if (!usess->active) { |
167 | goto end; | |
168 | } | |
169 | ||
170 | ret = ust_app_add_ctx_channel_glb(usess, uchan, uctx); | |
171 | if (ret < 0) { | |
172 | goto error; | |
173 | } | |
174 | end: | |
727d5404 DG |
175 | DBG("Context UST %d added to channel %s", uctx->ctx.ctx, uchan->name); |
176 | ||
177 | return 0; | |
6b79ed20 DG |
178 | |
179 | error: | |
180 | free(uctx); | |
aa3514e9 | 181 | duplicate: |
6b79ed20 DG |
182 | return ret; |
183 | } | |
184 | ||
b579acd9 DG |
185 | /* |
186 | * Add kernel context to tracer. | |
187 | */ | |
54d01ffb | 188 | int context_kernel_add(struct ltt_kernel_session *ksession, |
28ab034a JG |
189 | const struct lttng_event_context *ctx, |
190 | const char *channel_name) | |
b579acd9 DG |
191 | { |
192 | int ret; | |
193 | struct ltt_kernel_channel *kchan; | |
645328ae | 194 | struct ltt_kernel_context *kctx; |
54d01ffb | 195 | |
a0377dfe FD |
196 | LTTNG_ASSERT(ksession); |
197 | LTTNG_ASSERT(ctx); | |
198 | LTTNG_ASSERT(channel_name); | |
0525e9ae | 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: | |
b8e2fb80 | 209 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_PID; |
9197c5c4 | 210 | break; |
9197c5c4 | 211 | case LTTNG_EVENT_CONTEXT_PROCNAME: |
b8e2fb80 | 212 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_PROCNAME; |
9197c5c4 MD |
213 | break; |
214 | case LTTNG_EVENT_CONTEXT_PRIO: | |
b8e2fb80 | 215 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_PRIO; |
9197c5c4 MD |
216 | break; |
217 | case LTTNG_EVENT_CONTEXT_NICE: | |
b8e2fb80 | 218 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_NICE; |
9197c5c4 MD |
219 | break; |
220 | case LTTNG_EVENT_CONTEXT_VPID: | |
b8e2fb80 | 221 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VPID; |
9197c5c4 MD |
222 | break; |
223 | case LTTNG_EVENT_CONTEXT_TID: | |
b8e2fb80 | 224 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_TID; |
9197c5c4 MD |
225 | break; |
226 | case LTTNG_EVENT_CONTEXT_VTID: | |
b8e2fb80 | 227 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VTID; |
9197c5c4 MD |
228 | break; |
229 | case LTTNG_EVENT_CONTEXT_PPID: | |
b8e2fb80 | 230 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_PPID; |
9197c5c4 MD |
231 | break; |
232 | case LTTNG_EVENT_CONTEXT_VPPID: | |
b8e2fb80 | 233 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VPPID; |
9197c5c4 | 234 | break; |
54773d68 | 235 | case LTTNG_EVENT_CONTEXT_HOSTNAME: |
b8e2fb80 | 236 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_HOSTNAME; |
54773d68 | 237 | break; |
aa3514e9 MD |
238 | case LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER: |
239 | case LTTNG_EVENT_CONTEXT_PERF_COUNTER: | |
b8e2fb80 | 240 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_PERF_CPU_COUNTER; |
aa3514e9 | 241 | break; |
1ae5e83e | 242 | case LTTNG_EVENT_CONTEXT_INTERRUPTIBLE: |
b8e2fb80 | 243 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_INTERRUPTIBLE; |
1ae5e83e JD |
244 | break; |
245 | case LTTNG_EVENT_CONTEXT_PREEMPTIBLE: | |
b8e2fb80 | 246 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_PREEMPTIBLE; |
1ae5e83e JD |
247 | break; |
248 | case LTTNG_EVENT_CONTEXT_NEED_RESCHEDULE: | |
b8e2fb80 | 249 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_NEED_RESCHEDULE; |
1ae5e83e JD |
250 | break; |
251 | case LTTNG_EVENT_CONTEXT_MIGRATABLE: | |
b8e2fb80 | 252 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_MIGRATABLE; |
1ae5e83e | 253 | break; |
373148e9 | 254 | case LTTNG_EVENT_CONTEXT_CALLSTACK_KERNEL: |
b8e2fb80 | 255 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_CALLSTACK_KERNEL; |
373148e9 FG |
256 | break; |
257 | case LTTNG_EVENT_CONTEXT_CALLSTACK_USER: | |
b8e2fb80 | 258 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_CALLSTACK_USER; |
373148e9 | 259 | break; |
40e14884 | 260 | case LTTNG_EVENT_CONTEXT_CGROUP_NS: |
b8e2fb80 | 261 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_CGROUP_NS; |
40e14884 MJ |
262 | break; |
263 | case LTTNG_EVENT_CONTEXT_IPC_NS: | |
b8e2fb80 | 264 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_IPC_NS; |
40e14884 MJ |
265 | break; |
266 | case LTTNG_EVENT_CONTEXT_MNT_NS: | |
b8e2fb80 | 267 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_MNT_NS; |
40e14884 MJ |
268 | break; |
269 | case LTTNG_EVENT_CONTEXT_NET_NS: | |
b8e2fb80 | 270 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_NET_NS; |
40e14884 MJ |
271 | break; |
272 | case LTTNG_EVENT_CONTEXT_PID_NS: | |
b8e2fb80 | 273 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_PID_NS; |
40e14884 | 274 | break; |
d37ac3cd | 275 | case LTTNG_EVENT_CONTEXT_TIME_NS: |
b8e2fb80 | 276 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_TIME_NS; |
d37ac3cd | 277 | break; |
40e14884 | 278 | case LTTNG_EVENT_CONTEXT_USER_NS: |
b8e2fb80 | 279 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_USER_NS; |
40e14884 MJ |
280 | break; |
281 | case LTTNG_EVENT_CONTEXT_UTS_NS: | |
b8e2fb80 | 282 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_UTS_NS; |
40e14884 | 283 | break; |
499cbfa1 | 284 | case LTTNG_EVENT_CONTEXT_UID: |
b8e2fb80 | 285 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_UID; |
499cbfa1 MJ |
286 | break; |
287 | case LTTNG_EVENT_CONTEXT_EUID: | |
b8e2fb80 | 288 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_EUID; |
499cbfa1 MJ |
289 | break; |
290 | case LTTNG_EVENT_CONTEXT_SUID: | |
b8e2fb80 | 291 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_SUID; |
499cbfa1 MJ |
292 | break; |
293 | case LTTNG_EVENT_CONTEXT_GID: | |
b8e2fb80 | 294 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_GID; |
499cbfa1 MJ |
295 | break; |
296 | case LTTNG_EVENT_CONTEXT_EGID: | |
b8e2fb80 | 297 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_EGID; |
499cbfa1 MJ |
298 | break; |
299 | case LTTNG_EVENT_CONTEXT_SGID: | |
b8e2fb80 | 300 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_SGID; |
499cbfa1 MJ |
301 | break; |
302 | case LTTNG_EVENT_CONTEXT_VUID: | |
b8e2fb80 | 303 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VUID; |
499cbfa1 MJ |
304 | break; |
305 | case LTTNG_EVENT_CONTEXT_VEUID: | |
b8e2fb80 | 306 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VEUID; |
499cbfa1 MJ |
307 | break; |
308 | case LTTNG_EVENT_CONTEXT_VSUID: | |
b8e2fb80 | 309 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VSUID; |
499cbfa1 MJ |
310 | break; |
311 | case LTTNG_EVENT_CONTEXT_VGID: | |
b8e2fb80 | 312 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VGID; |
499cbfa1 MJ |
313 | break; |
314 | case LTTNG_EVENT_CONTEXT_VEGID: | |
b8e2fb80 | 315 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VEGID; |
499cbfa1 MJ |
316 | break; |
317 | case LTTNG_EVENT_CONTEXT_VSGID: | |
b8e2fb80 | 318 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VSGID; |
499cbfa1 | 319 | break; |
9197c5c4 | 320 | default: |
fc7324e8 DG |
321 | ret = LTTNG_ERR_KERN_CONTEXT_FAIL; |
322 | goto error; | |
9197c5c4 MD |
323 | } |
324 | ||
645328ae DG |
325 | kctx->ctx.u.perf_counter.type = ctx->u.perf_counter.type; |
326 | kctx->ctx.u.perf_counter.config = ctx->u.perf_counter.config; | |
28ab034a | 327 | strncpy(kctx->ctx.u.perf_counter.name, ctx->u.perf_counter.name, LTTNG_SYMBOL_NAME_LEN); |
645328ae | 328 | kctx->ctx.u.perf_counter.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; |
b579acd9 | 329 | |
9d035200 | 330 | if (*channel_name == '\0') { |
645328ae | 331 | ret = add_kctx_all_channels(ksession, kctx); |
df3c77c8 JG |
332 | /* Ownership of kctx is transferred to the callee. */ |
333 | kctx = NULL; | |
f73fabfd | 334 | if (ret != LTTNG_OK) { |
b579acd9 DG |
335 | goto error; |
336 | } | |
337 | } else { | |
338 | /* Get kernel channel */ | |
62499ad6 | 339 | kchan = trace_kernel_get_channel_by_name(channel_name, ksession); |
b579acd9 | 340 | if (kchan == NULL) { |
f73fabfd | 341 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
b579acd9 DG |
342 | goto error; |
343 | } | |
344 | ||
645328ae | 345 | ret = add_kctx_to_channel(kctx, kchan); |
df3c77c8 JG |
346 | /* Ownership of kctx is transferred to the callee. */ |
347 | kctx = NULL; | |
f73fabfd | 348 | if (ret != LTTNG_OK) { |
b579acd9 DG |
349 | goto error; |
350 | } | |
351 | } | |
352 | ||
df3c77c8 | 353 | ret = LTTNG_OK; |
b579acd9 DG |
354 | |
355 | error: | |
fc7324e8 DG |
356 | if (kctx) { |
357 | trace_kernel_destroy_context(kctx); | |
358 | } | |
b579acd9 DG |
359 | return ret; |
360 | } | |
2bdd86d4 MD |
361 | |
362 | /* | |
55cc08a6 | 363 | * Add UST context to tracer. |
2bdd86d4 | 364 | */ |
4ce7709b | 365 | int context_ust_add(struct ltt_ust_session *usess, |
28ab034a JG |
366 | enum lttng_domain_type domain, |
367 | const struct lttng_event_context *ctx, | |
368 | const char *channel_name) | |
2bdd86d4 | 369 | { |
601d5acf | 370 | int ret = LTTNG_OK; |
442359c0 | 371 | struct lttng_ht_iter iter; |
bec39940 | 372 | struct lttng_ht *chan_ht; |
55cc08a6 | 373 | struct ltt_ust_channel *uchan = NULL; |
2bdd86d4 | 374 | |
a0377dfe FD |
375 | LTTNG_ASSERT(usess); |
376 | LTTNG_ASSERT(ctx); | |
377 | LTTNG_ASSERT(channel_name); | |
0525e9ae | 378 | |
2223c96f DG |
379 | rcu_read_lock(); |
380 | ||
f5501dad | 381 | chan_ht = usess->domain_global.channels; |
2bdd86d4 | 382 | |
55cc08a6 | 383 | /* Get UST channel if defined */ |
9f9ee9c9 | 384 | if (channel_name[0] != '\0') { |
55cc08a6 DG |
385 | uchan = trace_ust_find_channel_by_name(chan_ht, channel_name); |
386 | if (uchan == NULL) { | |
f73fabfd | 387 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2bdd86d4 MD |
388 | goto error; |
389 | } | |
55cc08a6 DG |
390 | } |
391 | ||
601d5acf DG |
392 | if (uchan) { |
393 | /* Add ctx to channel */ | |
6b79ed20 | 394 | ret = add_uctx_to_channel(usess, domain, uchan, ctx); |
601d5acf | 395 | } else { |
e7fe706f | 396 | rcu_read_lock(); |
601d5acf | 397 | /* Add ctx all events, all channels */ |
28ab034a | 398 | cds_lfht_for_each_entry (chan_ht->ht, &iter.iter, uchan, node.node) { |
6b79ed20 | 399 | ret = add_uctx_to_channel(usess, domain, uchan, ctx); |
7682f304 | 400 | if (ret) { |
28ab034a | 401 | ERR("Failed to add context to channel %s", uchan->name); |
55cc08a6 DG |
402 | continue; |
403 | } | |
2bdd86d4 | 404 | } |
e7fe706f | 405 | rcu_read_unlock(); |
55cc08a6 | 406 | } |
2bdd86d4 | 407 | |
55cc08a6 | 408 | switch (ret) { |
7682f304 | 409 | case LTTNG_ERR_UST_CONTEXT_EXIST: |
727d5404 | 410 | break; |
55cc08a6 | 411 | case -ENOMEM: |
7682f304 | 412 | case -LTTNG_ERR_NOMEM: |
f73fabfd | 413 | ret = LTTNG_ERR_FATAL; |
727d5404 DG |
414 | break; |
415 | case -EINVAL: | |
f73fabfd | 416 | ret = LTTNG_ERR_UST_CONTEXT_INVAL; |
727d5404 DG |
417 | break; |
418 | case -ENOSYS: | |
f73fabfd | 419 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
727d5404 DG |
420 | break; |
421 | default: | |
7682f304 JG |
422 | if (ret != 0 && ret != LTTNG_OK) { |
423 | ret = ret > 0 ? ret : LTTNG_ERR_UNK; | |
424 | } else { | |
425 | ret = LTTNG_OK; | |
426 | } | |
727d5404 | 427 | break; |
2bdd86d4 MD |
428 | } |
429 | ||
2bdd86d4 | 430 | error: |
2223c96f | 431 | rcu_read_unlock(); |
2bdd86d4 MD |
432 | return ret; |
433 | } |