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 | 32 | |
b579acd9 DG |
33 | /* |
34 | * Add kernel context to all channel. | |
b579acd9 DG |
35 | */ |
36 | static int add_kctx_all_channels(struct ltt_kernel_session *ksession, | |
645328ae | 37 | struct ltt_kernel_context *kctx) |
b579acd9 | 38 | { |
601d5acf | 39 | int ret; |
b579acd9 DG |
40 | struct ltt_kernel_channel *kchan; |
41 | ||
0525e9ae DG |
42 | assert(ksession); |
43 | assert(kctx); | |
44 | ||
601d5acf | 45 | DBG("Adding kernel context to all channels"); |
b579acd9 DG |
46 | |
47 | /* Go over all channels */ | |
48 | cds_list_for_each_entry(kchan, &ksession->channel_list.head, list) { | |
601d5acf DG |
49 | ret = kernel_add_channel_context(kchan, kctx); |
50 | if (ret < 0) { | |
51 | ret = LTTNG_ERR_KERN_CONTEXT_FAIL; | |
52 | goto error; | |
b579acd9 DG |
53 | } |
54 | } | |
55 | ||
f73fabfd | 56 | ret = LTTNG_OK; |
b579acd9 DG |
57 | |
58 | error: | |
59 | return ret; | |
60 | } | |
61 | ||
62 | /* | |
63 | * Add kernel context to a specific channel. | |
b579acd9 | 64 | */ |
645328ae | 65 | static int add_kctx_to_channel(struct ltt_kernel_context *kctx, |
601d5acf | 66 | struct ltt_kernel_channel *kchan) |
b579acd9 | 67 | { |
601d5acf | 68 | int ret; |
b579acd9 | 69 | |
0525e9ae DG |
70 | assert(kchan); |
71 | assert(kctx); | |
72 | ||
601d5acf | 73 | DBG("Add kernel context to channel '%s'", kchan->channel->name); |
b579acd9 | 74 | |
601d5acf DG |
75 | ret = kernel_add_channel_context(kchan, kctx); |
76 | if (ret < 0) { | |
77 | ret = LTTNG_ERR_KERN_CONTEXT_FAIL; | |
b579acd9 DG |
78 | goto error; |
79 | } | |
80 | ||
f73fabfd | 81 | ret = LTTNG_OK; |
b579acd9 DG |
82 | |
83 | error: | |
84 | return ret; | |
85 | } | |
86 | ||
6b79ed20 DG |
87 | /* |
88 | * Add UST context to channel. | |
89 | */ | |
90 | static int add_uctx_to_channel(struct ltt_ust_session *usess, int domain, | |
91 | struct ltt_ust_channel *uchan, struct lttng_event_context *ctx) | |
92 | { | |
93 | int ret; | |
94 | struct ltt_ust_context *uctx; | |
95 | ||
0525e9ae DG |
96 | assert(usess); |
97 | assert(uchan); | |
98 | assert(ctx); | |
99 | ||
aa3514e9 MD |
100 | /* Check if context is duplicate */ |
101 | cds_list_for_each_entry(uctx, &uchan->ctx_list, list) { | |
102 | if (trace_ust_match_context(uctx, ctx)) { | |
103 | ret = -EEXIST; | |
104 | goto duplicate; | |
105 | } | |
106 | } | |
107 | ||
6b79ed20 DG |
108 | /* Create ltt UST context */ |
109 | uctx = trace_ust_create_context(ctx); | |
110 | if (uctx == NULL) { | |
727d5404 | 111 | ret = -EINVAL; |
6b79ed20 DG |
112 | goto error; |
113 | } | |
114 | ||
115 | switch (domain) { | |
116 | case LTTNG_DOMAIN_UST: | |
117 | ret = ust_app_add_ctx_channel_glb(usess, uchan, uctx); | |
118 | if (ret < 0) { | |
119 | goto error; | |
120 | } | |
121 | break; | |
122 | default: | |
727d5404 DG |
123 | ret = -ENOSYS; |
124 | goto error; | |
125 | } | |
126 | ||
e7fe706f DG |
127 | rcu_read_lock(); |
128 | ||
6b79ed20 | 129 | /* Add ltt UST context node to ltt UST channel */ |
aa3514e9 | 130 | lttng_ht_add_ulong(uchan->ctx, &uctx->node); |
e7fe706f | 131 | rcu_read_unlock(); |
31746f93 | 132 | cds_list_add_tail(&uctx->list, &uchan->ctx_list); |
6b79ed20 | 133 | |
727d5404 DG |
134 | DBG("Context UST %d added to channel %s", uctx->ctx.ctx, uchan->name); |
135 | ||
136 | return 0; | |
6b79ed20 DG |
137 | |
138 | error: | |
139 | free(uctx); | |
aa3514e9 | 140 | duplicate: |
6b79ed20 DG |
141 | return ret; |
142 | } | |
143 | ||
b579acd9 DG |
144 | /* |
145 | * Add kernel context to tracer. | |
146 | */ | |
54d01ffb | 147 | int context_kernel_add(struct ltt_kernel_session *ksession, |
601d5acf | 148 | struct lttng_event_context *ctx, char *channel_name) |
b579acd9 DG |
149 | { |
150 | int ret; | |
151 | struct ltt_kernel_channel *kchan; | |
645328ae | 152 | struct ltt_kernel_context *kctx; |
54d01ffb | 153 | |
0525e9ae DG |
154 | assert(ksession); |
155 | assert(ctx); | |
156 | assert(channel_name); | |
157 | ||
645328ae DG |
158 | kctx = trace_kernel_create_context(NULL); |
159 | if (!kctx) { | |
160 | ret = LTTNG_ERR_NOMEM; | |
161 | goto error; | |
162 | } | |
163 | ||
54d01ffb | 164 | /* Setup kernel context structure */ |
9197c5c4 MD |
165 | switch (ctx->ctx) { |
166 | case LTTNG_EVENT_CONTEXT_PID: | |
645328ae | 167 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_PID; |
9197c5c4 | 168 | break; |
9197c5c4 | 169 | case LTTNG_EVENT_CONTEXT_PROCNAME: |
645328ae | 170 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_PROCNAME; |
9197c5c4 MD |
171 | break; |
172 | case LTTNG_EVENT_CONTEXT_PRIO: | |
645328ae | 173 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_PRIO; |
9197c5c4 MD |
174 | break; |
175 | case LTTNG_EVENT_CONTEXT_NICE: | |
645328ae | 176 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_NICE; |
9197c5c4 MD |
177 | break; |
178 | case LTTNG_EVENT_CONTEXT_VPID: | |
645328ae | 179 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_VPID; |
9197c5c4 MD |
180 | break; |
181 | case LTTNG_EVENT_CONTEXT_TID: | |
645328ae | 182 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_TID; |
9197c5c4 MD |
183 | break; |
184 | case LTTNG_EVENT_CONTEXT_VTID: | |
645328ae | 185 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_VTID; |
9197c5c4 MD |
186 | break; |
187 | case LTTNG_EVENT_CONTEXT_PPID: | |
645328ae | 188 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_PPID; |
9197c5c4 MD |
189 | break; |
190 | case LTTNG_EVENT_CONTEXT_VPPID: | |
645328ae | 191 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_VPPID; |
9197c5c4 | 192 | break; |
54773d68 | 193 | case LTTNG_EVENT_CONTEXT_HOSTNAME: |
645328ae | 194 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_HOSTNAME; |
54773d68 | 195 | break; |
aa3514e9 MD |
196 | case LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER: |
197 | case LTTNG_EVENT_CONTEXT_PERF_COUNTER: | |
645328ae | 198 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_PERF_CPU_COUNTER; |
aa3514e9 | 199 | break; |
9197c5c4 | 200 | default: |
fc7324e8 DG |
201 | ret = LTTNG_ERR_KERN_CONTEXT_FAIL; |
202 | goto error; | |
9197c5c4 MD |
203 | } |
204 | ||
645328ae DG |
205 | kctx->ctx.u.perf_counter.type = ctx->u.perf_counter.type; |
206 | kctx->ctx.u.perf_counter.config = ctx->u.perf_counter.config; | |
207 | strncpy(kctx->ctx.u.perf_counter.name, ctx->u.perf_counter.name, | |
54d01ffb | 208 | LTTNG_SYMBOL_NAME_LEN); |
645328ae | 209 | kctx->ctx.u.perf_counter.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; |
b579acd9 | 210 | |
9d035200 | 211 | if (*channel_name == '\0') { |
645328ae | 212 | ret = add_kctx_all_channels(ksession, kctx); |
f73fabfd | 213 | if (ret != LTTNG_OK) { |
b579acd9 DG |
214 | goto error; |
215 | } | |
216 | } else { | |
217 | /* Get kernel channel */ | |
62499ad6 | 218 | kchan = trace_kernel_get_channel_by_name(channel_name, ksession); |
b579acd9 | 219 | if (kchan == NULL) { |
f73fabfd | 220 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
b579acd9 DG |
221 | goto error; |
222 | } | |
223 | ||
645328ae | 224 | ret = add_kctx_to_channel(kctx, kchan); |
f73fabfd | 225 | if (ret != LTTNG_OK) { |
b579acd9 DG |
226 | goto error; |
227 | } | |
228 | } | |
229 | ||
fc7324e8 | 230 | return LTTNG_OK; |
b579acd9 DG |
231 | |
232 | error: | |
fc7324e8 DG |
233 | if (kctx) { |
234 | trace_kernel_destroy_context(kctx); | |
235 | } | |
b579acd9 DG |
236 | return ret; |
237 | } | |
2bdd86d4 MD |
238 | |
239 | /* | |
55cc08a6 | 240 | * Add UST context to tracer. |
2bdd86d4 | 241 | */ |
55cc08a6 | 242 | int context_ust_add(struct ltt_ust_session *usess, int domain, |
601d5acf | 243 | struct lttng_event_context *ctx, char *channel_name) |
2bdd86d4 | 244 | { |
601d5acf | 245 | int ret = LTTNG_OK; |
442359c0 | 246 | struct lttng_ht_iter iter; |
bec39940 | 247 | struct lttng_ht *chan_ht; |
55cc08a6 | 248 | struct ltt_ust_channel *uchan = NULL; |
2bdd86d4 | 249 | |
0525e9ae DG |
250 | assert(usess); |
251 | assert(ctx); | |
252 | assert(channel_name); | |
253 | ||
2223c96f DG |
254 | rcu_read_lock(); |
255 | ||
6b79ed20 DG |
256 | /* |
257 | * Define which channel's hashtable to use from the domain or quit if | |
258 | * unknown domain. | |
259 | */ | |
55cc08a6 DG |
260 | switch (domain) { |
261 | case LTTNG_DOMAIN_UST: | |
262 | chan_ht = usess->domain_global.channels; | |
263 | break; | |
d78d6610 | 264 | #if 0 |
55cc08a6 DG |
265 | case LTTNG_DOMAIN_UST_EXEC_NAME: |
266 | case LTTNG_DOMAIN_UST_PID: | |
267 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
d78d6610 | 268 | #endif |
55cc08a6 | 269 | default: |
f73fabfd | 270 | ret = LTTNG_ERR_UND; |
2bdd86d4 MD |
271 | goto error; |
272 | } | |
2bdd86d4 | 273 | |
55cc08a6 | 274 | /* Get UST channel if defined */ |
9f9ee9c9 | 275 | if (channel_name[0] != '\0') { |
55cc08a6 DG |
276 | uchan = trace_ust_find_channel_by_name(chan_ht, channel_name); |
277 | if (uchan == NULL) { | |
f73fabfd | 278 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2bdd86d4 MD |
279 | goto error; |
280 | } | |
55cc08a6 DG |
281 | } |
282 | ||
601d5acf DG |
283 | if (uchan) { |
284 | /* Add ctx to channel */ | |
6b79ed20 | 285 | ret = add_uctx_to_channel(usess, domain, uchan, ctx); |
601d5acf | 286 | } else { |
e7fe706f | 287 | rcu_read_lock(); |
601d5acf | 288 | /* Add ctx all events, all channels */ |
bec39940 | 289 | cds_lfht_for_each_entry(chan_ht->ht, &iter.iter, uchan, node.node) { |
6b79ed20 | 290 | ret = add_uctx_to_channel(usess, domain, uchan, ctx); |
55cc08a6 | 291 | if (ret < 0) { |
ae856491 | 292 | ERR("Context failed for channel %s", uchan->name); |
55cc08a6 DG |
293 | continue; |
294 | } | |
2bdd86d4 | 295 | } |
e7fe706f | 296 | rcu_read_unlock(); |
55cc08a6 | 297 | } |
2bdd86d4 | 298 | |
55cc08a6 DG |
299 | switch (ret) { |
300 | case -EEXIST: | |
f73fabfd | 301 | ret = LTTNG_ERR_UST_CONTEXT_EXIST; |
727d5404 | 302 | break; |
55cc08a6 | 303 | case -ENOMEM: |
f73fabfd | 304 | ret = LTTNG_ERR_FATAL; |
727d5404 DG |
305 | break; |
306 | case -EINVAL: | |
f73fabfd | 307 | ret = LTTNG_ERR_UST_CONTEXT_INVAL; |
727d5404 DG |
308 | break; |
309 | case -ENOSYS: | |
f73fabfd | 310 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
727d5404 DG |
311 | break; |
312 | default: | |
f73fabfd | 313 | ret = LTTNG_OK; |
727d5404 | 314 | break; |
2bdd86d4 MD |
315 | } |
316 | ||
2bdd86d4 | 317 | error: |
2223c96f | 318 | rcu_read_unlock(); |
2bdd86d4 MD |
319 | return ret; |
320 | } |