Commit | Line | Data |
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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 |
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 | ||
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 */ | |
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 | |
a0377dfe FD |
77 | LTTNG_ASSERT(kchan); |
78 | LTTNG_ASSERT(kctx); | |
0525e9ae | 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 | |
a0377dfe FD |
106 | LTTNG_ASSERT(usess); |
107 | LTTNG_ASSERT(uchan); | |
108 | LTTNG_ASSERT(ctx); | |
0525e9ae | 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: | |
a0377dfe | 153 | abort(); |
bdf64013 | 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, |
26e1c61f JR |
190 | const struct lttng_event_context *ctx, |
191 | const char *channel_name) | |
b579acd9 DG |
192 | { |
193 | int ret; | |
194 | struct ltt_kernel_channel *kchan; | |
645328ae | 195 | struct ltt_kernel_context *kctx; |
54d01ffb | 196 | |
a0377dfe FD |
197 | LTTNG_ASSERT(ksession); |
198 | LTTNG_ASSERT(ctx); | |
199 | LTTNG_ASSERT(channel_name); | |
0525e9ae | 200 | |
645328ae DG |
201 | kctx = trace_kernel_create_context(NULL); |
202 | if (!kctx) { | |
7682f304 | 203 | ret = -LTTNG_ERR_NOMEM; |
645328ae DG |
204 | goto error; |
205 | } | |
206 | ||
54d01ffb | 207 | /* Setup kernel context structure */ |
9197c5c4 MD |
208 | switch (ctx->ctx) { |
209 | case LTTNG_EVENT_CONTEXT_PID: | |
b8e2fb80 | 210 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_PID; |
9197c5c4 | 211 | break; |
9197c5c4 | 212 | case LTTNG_EVENT_CONTEXT_PROCNAME: |
b8e2fb80 | 213 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_PROCNAME; |
9197c5c4 MD |
214 | break; |
215 | case LTTNG_EVENT_CONTEXT_PRIO: | |
b8e2fb80 | 216 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_PRIO; |
9197c5c4 MD |
217 | break; |
218 | case LTTNG_EVENT_CONTEXT_NICE: | |
b8e2fb80 | 219 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_NICE; |
9197c5c4 MD |
220 | break; |
221 | case LTTNG_EVENT_CONTEXT_VPID: | |
b8e2fb80 | 222 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VPID; |
9197c5c4 MD |
223 | break; |
224 | case LTTNG_EVENT_CONTEXT_TID: | |
b8e2fb80 | 225 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_TID; |
9197c5c4 MD |
226 | break; |
227 | case LTTNG_EVENT_CONTEXT_VTID: | |
b8e2fb80 | 228 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VTID; |
9197c5c4 MD |
229 | break; |
230 | case LTTNG_EVENT_CONTEXT_PPID: | |
b8e2fb80 | 231 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_PPID; |
9197c5c4 MD |
232 | break; |
233 | case LTTNG_EVENT_CONTEXT_VPPID: | |
b8e2fb80 | 234 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VPPID; |
9197c5c4 | 235 | break; |
54773d68 | 236 | case LTTNG_EVENT_CONTEXT_HOSTNAME: |
b8e2fb80 | 237 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_HOSTNAME; |
54773d68 | 238 | break; |
aa3514e9 MD |
239 | case LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER: |
240 | case LTTNG_EVENT_CONTEXT_PERF_COUNTER: | |
b8e2fb80 | 241 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_PERF_CPU_COUNTER; |
aa3514e9 | 242 | break; |
1ae5e83e | 243 | case LTTNG_EVENT_CONTEXT_INTERRUPTIBLE: |
b8e2fb80 | 244 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_INTERRUPTIBLE; |
1ae5e83e JD |
245 | break; |
246 | case LTTNG_EVENT_CONTEXT_PREEMPTIBLE: | |
b8e2fb80 | 247 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_PREEMPTIBLE; |
1ae5e83e JD |
248 | break; |
249 | case LTTNG_EVENT_CONTEXT_NEED_RESCHEDULE: | |
b8e2fb80 | 250 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_NEED_RESCHEDULE; |
1ae5e83e JD |
251 | break; |
252 | case LTTNG_EVENT_CONTEXT_MIGRATABLE: | |
b8e2fb80 | 253 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_MIGRATABLE; |
1ae5e83e | 254 | break; |
373148e9 | 255 | case LTTNG_EVENT_CONTEXT_CALLSTACK_KERNEL: |
b8e2fb80 | 256 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_CALLSTACK_KERNEL; |
373148e9 FG |
257 | break; |
258 | case LTTNG_EVENT_CONTEXT_CALLSTACK_USER: | |
b8e2fb80 | 259 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_CALLSTACK_USER; |
373148e9 | 260 | break; |
40e14884 | 261 | case LTTNG_EVENT_CONTEXT_CGROUP_NS: |
b8e2fb80 | 262 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_CGROUP_NS; |
40e14884 MJ |
263 | break; |
264 | case LTTNG_EVENT_CONTEXT_IPC_NS: | |
b8e2fb80 | 265 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_IPC_NS; |
40e14884 MJ |
266 | break; |
267 | case LTTNG_EVENT_CONTEXT_MNT_NS: | |
b8e2fb80 | 268 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_MNT_NS; |
40e14884 MJ |
269 | break; |
270 | case LTTNG_EVENT_CONTEXT_NET_NS: | |
b8e2fb80 | 271 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_NET_NS; |
40e14884 MJ |
272 | break; |
273 | case LTTNG_EVENT_CONTEXT_PID_NS: | |
b8e2fb80 | 274 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_PID_NS; |
40e14884 | 275 | break; |
d37ac3cd | 276 | case LTTNG_EVENT_CONTEXT_TIME_NS: |
b8e2fb80 | 277 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_TIME_NS; |
d37ac3cd | 278 | break; |
40e14884 | 279 | case LTTNG_EVENT_CONTEXT_USER_NS: |
b8e2fb80 | 280 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_USER_NS; |
40e14884 MJ |
281 | break; |
282 | case LTTNG_EVENT_CONTEXT_UTS_NS: | |
b8e2fb80 | 283 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_UTS_NS; |
40e14884 | 284 | break; |
499cbfa1 | 285 | case LTTNG_EVENT_CONTEXT_UID: |
b8e2fb80 | 286 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_UID; |
499cbfa1 MJ |
287 | break; |
288 | case LTTNG_EVENT_CONTEXT_EUID: | |
b8e2fb80 | 289 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_EUID; |
499cbfa1 MJ |
290 | break; |
291 | case LTTNG_EVENT_CONTEXT_SUID: | |
b8e2fb80 | 292 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_SUID; |
499cbfa1 MJ |
293 | break; |
294 | case LTTNG_EVENT_CONTEXT_GID: | |
b8e2fb80 | 295 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_GID; |
499cbfa1 MJ |
296 | break; |
297 | case LTTNG_EVENT_CONTEXT_EGID: | |
b8e2fb80 | 298 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_EGID; |
499cbfa1 MJ |
299 | break; |
300 | case LTTNG_EVENT_CONTEXT_SGID: | |
b8e2fb80 | 301 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_SGID; |
499cbfa1 MJ |
302 | break; |
303 | case LTTNG_EVENT_CONTEXT_VUID: | |
b8e2fb80 | 304 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VUID; |
499cbfa1 MJ |
305 | break; |
306 | case LTTNG_EVENT_CONTEXT_VEUID: | |
b8e2fb80 | 307 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VEUID; |
499cbfa1 MJ |
308 | break; |
309 | case LTTNG_EVENT_CONTEXT_VSUID: | |
b8e2fb80 | 310 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VSUID; |
499cbfa1 MJ |
311 | break; |
312 | case LTTNG_EVENT_CONTEXT_VGID: | |
b8e2fb80 | 313 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VGID; |
499cbfa1 MJ |
314 | break; |
315 | case LTTNG_EVENT_CONTEXT_VEGID: | |
b8e2fb80 | 316 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VEGID; |
499cbfa1 MJ |
317 | break; |
318 | case LTTNG_EVENT_CONTEXT_VSGID: | |
b8e2fb80 | 319 | kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VSGID; |
499cbfa1 | 320 | break; |
9197c5c4 | 321 | default: |
fc7324e8 DG |
322 | ret = LTTNG_ERR_KERN_CONTEXT_FAIL; |
323 | goto error; | |
9197c5c4 MD |
324 | } |
325 | ||
645328ae DG |
326 | kctx->ctx.u.perf_counter.type = ctx->u.perf_counter.type; |
327 | kctx->ctx.u.perf_counter.config = ctx->u.perf_counter.config; | |
328 | strncpy(kctx->ctx.u.perf_counter.name, ctx->u.perf_counter.name, | |
54d01ffb | 329 | LTTNG_SYMBOL_NAME_LEN); |
645328ae | 330 | kctx->ctx.u.perf_counter.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; |
b579acd9 | 331 | |
9d035200 | 332 | if (*channel_name == '\0') { |
645328ae | 333 | ret = add_kctx_all_channels(ksession, kctx); |
df3c77c8 JG |
334 | /* Ownership of kctx is transferred to the callee. */ |
335 | kctx = NULL; | |
f73fabfd | 336 | if (ret != LTTNG_OK) { |
b579acd9 DG |
337 | goto error; |
338 | } | |
339 | } else { | |
340 | /* Get kernel channel */ | |
62499ad6 | 341 | kchan = trace_kernel_get_channel_by_name(channel_name, ksession); |
b579acd9 | 342 | if (kchan == NULL) { |
f73fabfd | 343 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
b579acd9 DG |
344 | goto error; |
345 | } | |
346 | ||
645328ae | 347 | ret = add_kctx_to_channel(kctx, kchan); |
df3c77c8 JG |
348 | /* Ownership of kctx is transferred to the callee. */ |
349 | kctx = NULL; | |
f73fabfd | 350 | if (ret != LTTNG_OK) { |
b579acd9 DG |
351 | goto error; |
352 | } | |
353 | } | |
354 | ||
df3c77c8 | 355 | ret = LTTNG_OK; |
b579acd9 DG |
356 | |
357 | error: | |
fc7324e8 DG |
358 | if (kctx) { |
359 | trace_kernel_destroy_context(kctx); | |
360 | } | |
b579acd9 DG |
361 | return ret; |
362 | } | |
2bdd86d4 MD |
363 | |
364 | /* | |
55cc08a6 | 365 | * Add UST context to tracer. |
2bdd86d4 | 366 | */ |
4ce7709b | 367 | int context_ust_add(struct ltt_ust_session *usess, |
df4f5a87 JG |
368 | enum lttng_domain_type domain, |
369 | const struct lttng_event_context *ctx, | |
26e1c61f | 370 | const char *channel_name) |
2bdd86d4 | 371 | { |
601d5acf | 372 | int ret = LTTNG_OK; |
442359c0 | 373 | struct lttng_ht_iter iter; |
bec39940 | 374 | struct lttng_ht *chan_ht; |
55cc08a6 | 375 | struct ltt_ust_channel *uchan = NULL; |
2bdd86d4 | 376 | |
a0377dfe FD |
377 | LTTNG_ASSERT(usess); |
378 | LTTNG_ASSERT(ctx); | |
379 | LTTNG_ASSERT(channel_name); | |
0525e9ae | 380 | |
2223c96f DG |
381 | rcu_read_lock(); |
382 | ||
f5501dad | 383 | chan_ht = usess->domain_global.channels; |
2bdd86d4 | 384 | |
55cc08a6 | 385 | /* Get UST channel if defined */ |
9f9ee9c9 | 386 | if (channel_name[0] != '\0') { |
55cc08a6 DG |
387 | uchan = trace_ust_find_channel_by_name(chan_ht, channel_name); |
388 | if (uchan == NULL) { | |
f73fabfd | 389 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2bdd86d4 MD |
390 | goto error; |
391 | } | |
55cc08a6 DG |
392 | } |
393 | ||
601d5acf DG |
394 | if (uchan) { |
395 | /* Add ctx to channel */ | |
6b79ed20 | 396 | ret = add_uctx_to_channel(usess, domain, uchan, ctx); |
601d5acf | 397 | } else { |
e7fe706f | 398 | rcu_read_lock(); |
601d5acf | 399 | /* Add ctx all events, all channels */ |
bec39940 | 400 | cds_lfht_for_each_entry(chan_ht->ht, &iter.iter, uchan, node.node) { |
6b79ed20 | 401 | ret = add_uctx_to_channel(usess, domain, uchan, ctx); |
7682f304 | 402 | if (ret) { |
9589be74 JG |
403 | ERR("Failed to add context to channel %s", |
404 | uchan->name); | |
55cc08a6 DG |
405 | continue; |
406 | } | |
2bdd86d4 | 407 | } |
e7fe706f | 408 | rcu_read_unlock(); |
55cc08a6 | 409 | } |
2bdd86d4 | 410 | |
55cc08a6 | 411 | switch (ret) { |
7682f304 | 412 | case LTTNG_ERR_UST_CONTEXT_EXIST: |
727d5404 | 413 | break; |
55cc08a6 | 414 | case -ENOMEM: |
7682f304 | 415 | case -LTTNG_ERR_NOMEM: |
f73fabfd | 416 | ret = LTTNG_ERR_FATAL; |
727d5404 DG |
417 | break; |
418 | case -EINVAL: | |
f73fabfd | 419 | ret = LTTNG_ERR_UST_CONTEXT_INVAL; |
727d5404 DG |
420 | break; |
421 | case -ENOSYS: | |
f73fabfd | 422 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
727d5404 DG |
423 | break; |
424 | default: | |
7682f304 JG |
425 | if (ret != 0 && ret != LTTNG_OK) { |
426 | ret = ret > 0 ? ret : LTTNG_ERR_UNK; | |
427 | } else { | |
428 | ret = LTTNG_OK; | |
429 | } | |
727d5404 | 430 | break; |
2bdd86d4 MD |
431 | } |
432 | ||
2bdd86d4 | 433 | error: |
2223c96f | 434 | rcu_read_unlock(); |
2bdd86d4 MD |
435 | return ret; |
436 | } |