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 | ||
6c1c0768 | 18 | #define _LGPL_SOURCE |
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 | |
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 | */ | |
4ce7709b JG |
90 | static int add_uctx_to_channel(struct ltt_ust_session *usess, |
91 | enum lttng_domain_type domain, | |
6b79ed20 DG |
92 | struct ltt_ust_channel *uchan, struct lttng_event_context *ctx) |
93 | { | |
94 | int ret; | |
95 | struct ltt_ust_context *uctx; | |
96 | ||
0525e9ae DG |
97 | assert(usess); |
98 | assert(uchan); | |
99 | assert(ctx); | |
c0c66aec | 100 | assert(domain == LTTNG_DOMAIN_UST); |
0525e9ae | 101 | |
aa3514e9 MD |
102 | /* Check if context is duplicate */ |
103 | cds_list_for_each_entry(uctx, &uchan->ctx_list, list) { | |
104 | if (trace_ust_match_context(uctx, ctx)) { | |
105 | ret = -EEXIST; | |
106 | goto duplicate; | |
107 | } | |
108 | } | |
109 | ||
6b79ed20 DG |
110 | /* Create ltt UST context */ |
111 | uctx = trace_ust_create_context(ctx); | |
112 | if (uctx == NULL) { | |
727d5404 | 113 | ret = -EINVAL; |
6b79ed20 DG |
114 | goto error; |
115 | } | |
116 | ||
c0c66aec JG |
117 | ret = ust_app_add_ctx_channel_glb(usess, uchan, uctx); |
118 | if (ret < 0) { | |
727d5404 DG |
119 | goto error; |
120 | } | |
121 | ||
e7fe706f DG |
122 | rcu_read_lock(); |
123 | ||
6b79ed20 | 124 | /* Add ltt UST context node to ltt UST channel */ |
aa3514e9 | 125 | lttng_ht_add_ulong(uchan->ctx, &uctx->node); |
e7fe706f | 126 | rcu_read_unlock(); |
31746f93 | 127 | cds_list_add_tail(&uctx->list, &uchan->ctx_list); |
6b79ed20 | 128 | |
727d5404 DG |
129 | DBG("Context UST %d added to channel %s", uctx->ctx.ctx, uchan->name); |
130 | ||
131 | return 0; | |
6b79ed20 DG |
132 | |
133 | error: | |
134 | free(uctx); | |
aa3514e9 | 135 | duplicate: |
6b79ed20 DG |
136 | return ret; |
137 | } | |
138 | ||
b579acd9 DG |
139 | /* |
140 | * Add kernel context to tracer. | |
141 | */ | |
54d01ffb | 142 | int context_kernel_add(struct ltt_kernel_session *ksession, |
601d5acf | 143 | struct lttng_event_context *ctx, char *channel_name) |
b579acd9 DG |
144 | { |
145 | int ret; | |
146 | struct ltt_kernel_channel *kchan; | |
645328ae | 147 | struct ltt_kernel_context *kctx; |
54d01ffb | 148 | |
0525e9ae DG |
149 | assert(ksession); |
150 | assert(ctx); | |
151 | assert(channel_name); | |
152 | ||
645328ae DG |
153 | kctx = trace_kernel_create_context(NULL); |
154 | if (!kctx) { | |
155 | ret = LTTNG_ERR_NOMEM; | |
156 | goto error; | |
157 | } | |
158 | ||
54d01ffb | 159 | /* Setup kernel context structure */ |
9197c5c4 MD |
160 | switch (ctx->ctx) { |
161 | case LTTNG_EVENT_CONTEXT_PID: | |
645328ae | 162 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_PID; |
9197c5c4 | 163 | break; |
9197c5c4 | 164 | case LTTNG_EVENT_CONTEXT_PROCNAME: |
645328ae | 165 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_PROCNAME; |
9197c5c4 MD |
166 | break; |
167 | case LTTNG_EVENT_CONTEXT_PRIO: | |
645328ae | 168 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_PRIO; |
9197c5c4 MD |
169 | break; |
170 | case LTTNG_EVENT_CONTEXT_NICE: | |
645328ae | 171 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_NICE; |
9197c5c4 MD |
172 | break; |
173 | case LTTNG_EVENT_CONTEXT_VPID: | |
645328ae | 174 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_VPID; |
9197c5c4 MD |
175 | break; |
176 | case LTTNG_EVENT_CONTEXT_TID: | |
645328ae | 177 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_TID; |
9197c5c4 MD |
178 | break; |
179 | case LTTNG_EVENT_CONTEXT_VTID: | |
645328ae | 180 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_VTID; |
9197c5c4 MD |
181 | break; |
182 | case LTTNG_EVENT_CONTEXT_PPID: | |
645328ae | 183 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_PPID; |
9197c5c4 MD |
184 | break; |
185 | case LTTNG_EVENT_CONTEXT_VPPID: | |
645328ae | 186 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_VPPID; |
9197c5c4 | 187 | break; |
54773d68 | 188 | case LTTNG_EVENT_CONTEXT_HOSTNAME: |
645328ae | 189 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_HOSTNAME; |
54773d68 | 190 | break; |
aa3514e9 MD |
191 | case LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER: |
192 | case LTTNG_EVENT_CONTEXT_PERF_COUNTER: | |
645328ae | 193 | kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_PERF_CPU_COUNTER; |
aa3514e9 | 194 | break; |
9197c5c4 | 195 | default: |
fc7324e8 DG |
196 | ret = LTTNG_ERR_KERN_CONTEXT_FAIL; |
197 | goto error; | |
9197c5c4 MD |
198 | } |
199 | ||
645328ae DG |
200 | kctx->ctx.u.perf_counter.type = ctx->u.perf_counter.type; |
201 | kctx->ctx.u.perf_counter.config = ctx->u.perf_counter.config; | |
202 | strncpy(kctx->ctx.u.perf_counter.name, ctx->u.perf_counter.name, | |
54d01ffb | 203 | LTTNG_SYMBOL_NAME_LEN); |
645328ae | 204 | kctx->ctx.u.perf_counter.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; |
b579acd9 | 205 | |
9d035200 | 206 | if (*channel_name == '\0') { |
645328ae | 207 | ret = add_kctx_all_channels(ksession, kctx); |
f73fabfd | 208 | if (ret != LTTNG_OK) { |
b579acd9 DG |
209 | goto error; |
210 | } | |
211 | } else { | |
212 | /* Get kernel channel */ | |
62499ad6 | 213 | kchan = trace_kernel_get_channel_by_name(channel_name, ksession); |
b579acd9 | 214 | if (kchan == NULL) { |
f73fabfd | 215 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
b579acd9 DG |
216 | goto error; |
217 | } | |
218 | ||
645328ae | 219 | ret = add_kctx_to_channel(kctx, kchan); |
f73fabfd | 220 | if (ret != LTTNG_OK) { |
b579acd9 DG |
221 | goto error; |
222 | } | |
223 | } | |
224 | ||
fc7324e8 | 225 | return LTTNG_OK; |
b579acd9 DG |
226 | |
227 | error: | |
fc7324e8 DG |
228 | if (kctx) { |
229 | trace_kernel_destroy_context(kctx); | |
230 | } | |
b579acd9 DG |
231 | return ret; |
232 | } | |
2bdd86d4 MD |
233 | |
234 | /* | |
55cc08a6 | 235 | * Add UST context to tracer. |
2bdd86d4 | 236 | */ |
4ce7709b JG |
237 | int context_ust_add(struct ltt_ust_session *usess, |
238 | enum lttng_domain_type domain, struct lttng_event_context *ctx, | |
239 | char *channel_name) | |
2bdd86d4 | 240 | { |
601d5acf | 241 | int ret = LTTNG_OK; |
442359c0 | 242 | struct lttng_ht_iter iter; |
bec39940 | 243 | struct lttng_ht *chan_ht; |
55cc08a6 | 244 | struct ltt_ust_channel *uchan = NULL; |
2bdd86d4 | 245 | |
0525e9ae DG |
246 | assert(usess); |
247 | assert(ctx); | |
248 | assert(channel_name); | |
f5501dad | 249 | assert(domain == LTTNG_DOMAIN_UST); |
0525e9ae | 250 | |
2223c96f DG |
251 | rcu_read_lock(); |
252 | ||
f5501dad | 253 | chan_ht = usess->domain_global.channels; |
2bdd86d4 | 254 | |
55cc08a6 | 255 | /* Get UST channel if defined */ |
9f9ee9c9 | 256 | if (channel_name[0] != '\0') { |
55cc08a6 DG |
257 | uchan = trace_ust_find_channel_by_name(chan_ht, channel_name); |
258 | if (uchan == NULL) { | |
f73fabfd | 259 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2bdd86d4 MD |
260 | goto error; |
261 | } | |
55cc08a6 DG |
262 | } |
263 | ||
601d5acf DG |
264 | if (uchan) { |
265 | /* Add ctx to channel */ | |
6b79ed20 | 266 | ret = add_uctx_to_channel(usess, domain, uchan, ctx); |
601d5acf | 267 | } else { |
e7fe706f | 268 | rcu_read_lock(); |
601d5acf | 269 | /* Add ctx all events, all channels */ |
bec39940 | 270 | cds_lfht_for_each_entry(chan_ht->ht, &iter.iter, uchan, node.node) { |
6b79ed20 | 271 | ret = add_uctx_to_channel(usess, domain, uchan, ctx); |
55cc08a6 | 272 | if (ret < 0) { |
9589be74 JG |
273 | ERR("Failed to add context to channel %s", |
274 | uchan->name); | |
55cc08a6 DG |
275 | continue; |
276 | } | |
2bdd86d4 | 277 | } |
e7fe706f | 278 | rcu_read_unlock(); |
55cc08a6 | 279 | } |
2bdd86d4 | 280 | |
55cc08a6 DG |
281 | switch (ret) { |
282 | case -EEXIST: | |
f73fabfd | 283 | ret = LTTNG_ERR_UST_CONTEXT_EXIST; |
727d5404 | 284 | break; |
55cc08a6 | 285 | case -ENOMEM: |
f73fabfd | 286 | ret = LTTNG_ERR_FATAL; |
727d5404 DG |
287 | break; |
288 | case -EINVAL: | |
f73fabfd | 289 | ret = LTTNG_ERR_UST_CONTEXT_INVAL; |
727d5404 DG |
290 | break; |
291 | case -ENOSYS: | |
f73fabfd | 292 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
727d5404 DG |
293 | break; |
294 | default: | |
f73fabfd | 295 | ret = LTTNG_OK; |
727d5404 | 296 | break; |
2bdd86d4 MD |
297 | } |
298 | ||
2bdd86d4 | 299 | error: |
2223c96f | 300 | rcu_read_unlock(); |
2bdd86d4 MD |
301 | return ret; |
302 | } |