Commit | Line | Data |
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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, | |
601d5acf | 37 | struct lttng_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 DG |
64 | */ |
65 | static int add_kctx_to_channel(struct lttng_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; | |
727d5404 DG |
95 | struct lttng_ht_iter iter; |
96 | struct lttng_ht_node_ulong *uctx_node; | |
6b79ed20 | 97 | |
0525e9ae DG |
98 | assert(usess); |
99 | assert(uchan); | |
100 | assert(ctx); | |
101 | ||
6b79ed20 DG |
102 | /* Create ltt UST context */ |
103 | uctx = trace_ust_create_context(ctx); | |
104 | if (uctx == NULL) { | |
727d5404 | 105 | ret = -EINVAL; |
6b79ed20 DG |
106 | goto error; |
107 | } | |
108 | ||
109 | switch (domain) { | |
110 | case LTTNG_DOMAIN_UST: | |
111 | ret = ust_app_add_ctx_channel_glb(usess, uchan, uctx); | |
112 | if (ret < 0) { | |
113 | goto error; | |
114 | } | |
115 | break; | |
116 | default: | |
727d5404 DG |
117 | ret = -ENOSYS; |
118 | goto error; | |
119 | } | |
120 | ||
e7fe706f DG |
121 | rcu_read_lock(); |
122 | ||
727d5404 DG |
123 | /* Lookup context before adding it */ |
124 | lttng_ht_lookup(uchan->ctx, (void *)((unsigned long)uctx->ctx.ctx), &iter); | |
125 | uctx_node = lttng_ht_iter_get_node_ulong(&iter); | |
126 | if (uctx_node != NULL) { | |
127 | ret = -EEXIST; | |
e7fe706f | 128 | rcu_read_unlock(); |
6b79ed20 DG |
129 | goto error; |
130 | } | |
131 | ||
132 | /* Add ltt UST context node to ltt UST channel */ | |
bec39940 | 133 | lttng_ht_add_unique_ulong(uchan->ctx, &uctx->node); |
e7fe706f | 134 | rcu_read_unlock(); |
6b79ed20 | 135 | |
727d5404 DG |
136 | DBG("Context UST %d added to channel %s", uctx->ctx.ctx, uchan->name); |
137 | ||
138 | return 0; | |
6b79ed20 DG |
139 | |
140 | error: | |
141 | free(uctx); | |
142 | return ret; | |
143 | } | |
144 | ||
b579acd9 DG |
145 | /* |
146 | * Add kernel context to tracer. | |
147 | */ | |
54d01ffb | 148 | int context_kernel_add(struct ltt_kernel_session *ksession, |
601d5acf | 149 | struct lttng_event_context *ctx, char *channel_name) |
b579acd9 DG |
150 | { |
151 | int ret; | |
152 | struct ltt_kernel_channel *kchan; | |
54d01ffb DG |
153 | struct lttng_kernel_context kctx; |
154 | ||
0525e9ae DG |
155 | assert(ksession); |
156 | assert(ctx); | |
157 | assert(channel_name); | |
158 | ||
54d01ffb | 159 | /* Setup kernel context structure */ |
9197c5c4 MD |
160 | switch (ctx->ctx) { |
161 | case LTTNG_EVENT_CONTEXT_PID: | |
162 | kctx.ctx = LTTNG_KERNEL_CONTEXT_PID; | |
163 | break; | |
164 | case LTTNG_EVENT_CONTEXT_PERF_COUNTER: | |
165 | kctx.ctx = LTTNG_KERNEL_CONTEXT_PERF_COUNTER; | |
166 | break; | |
167 | case LTTNG_EVENT_CONTEXT_PROCNAME: | |
168 | kctx.ctx = LTTNG_KERNEL_CONTEXT_PROCNAME; | |
169 | break; | |
170 | case LTTNG_EVENT_CONTEXT_PRIO: | |
171 | kctx.ctx = LTTNG_KERNEL_CONTEXT_PRIO; | |
172 | break; | |
173 | case LTTNG_EVENT_CONTEXT_NICE: | |
174 | kctx.ctx = LTTNG_KERNEL_CONTEXT_NICE; | |
175 | break; | |
176 | case LTTNG_EVENT_CONTEXT_VPID: | |
177 | kctx.ctx = LTTNG_KERNEL_CONTEXT_VPID; | |
178 | break; | |
179 | case LTTNG_EVENT_CONTEXT_TID: | |
180 | kctx.ctx = LTTNG_KERNEL_CONTEXT_TID; | |
181 | break; | |
182 | case LTTNG_EVENT_CONTEXT_VTID: | |
183 | kctx.ctx = LTTNG_KERNEL_CONTEXT_VTID; | |
184 | break; | |
185 | case LTTNG_EVENT_CONTEXT_PPID: | |
186 | kctx.ctx = LTTNG_KERNEL_CONTEXT_PPID; | |
187 | break; | |
188 | case LTTNG_EVENT_CONTEXT_VPPID: | |
189 | kctx.ctx = LTTNG_KERNEL_CONTEXT_VPPID; | |
190 | break; | |
54773d68 JD |
191 | case LTTNG_EVENT_CONTEXT_HOSTNAME: |
192 | kctx.ctx = LTTNG_KERNEL_CONTEXT_HOSTNAME; | |
193 | break; | |
9197c5c4 | 194 | default: |
f73fabfd | 195 | return LTTNG_ERR_KERN_CONTEXT_FAIL; |
9197c5c4 MD |
196 | } |
197 | ||
54d01ffb DG |
198 | kctx.u.perf_counter.type = ctx->u.perf_counter.type; |
199 | kctx.u.perf_counter.config = ctx->u.perf_counter.config; | |
200 | strncpy(kctx.u.perf_counter.name, ctx->u.perf_counter.name, | |
201 | LTTNG_SYMBOL_NAME_LEN); | |
202 | kctx.u.perf_counter.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
b579acd9 | 203 | |
9d035200 | 204 | if (*channel_name == '\0') { |
601d5acf | 205 | ret = add_kctx_all_channels(ksession, &kctx); |
f73fabfd | 206 | if (ret != LTTNG_OK) { |
b579acd9 DG |
207 | goto error; |
208 | } | |
209 | } else { | |
210 | /* Get kernel channel */ | |
62499ad6 | 211 | kchan = trace_kernel_get_channel_by_name(channel_name, ksession); |
b579acd9 | 212 | if (kchan == NULL) { |
f73fabfd | 213 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
b579acd9 DG |
214 | goto error; |
215 | } | |
216 | ||
601d5acf | 217 | ret = add_kctx_to_channel(&kctx, kchan); |
f73fabfd | 218 | if (ret != LTTNG_OK) { |
b579acd9 DG |
219 | goto error; |
220 | } | |
221 | } | |
222 | ||
f73fabfd | 223 | ret = LTTNG_OK; |
b579acd9 DG |
224 | |
225 | error: | |
226 | return ret; | |
227 | } | |
2bdd86d4 MD |
228 | |
229 | /* | |
55cc08a6 | 230 | * Add UST context to tracer. |
2bdd86d4 | 231 | */ |
55cc08a6 | 232 | int context_ust_add(struct ltt_ust_session *usess, int domain, |
601d5acf | 233 | struct lttng_event_context *ctx, char *channel_name) |
2bdd86d4 | 234 | { |
601d5acf | 235 | int ret = LTTNG_OK; |
442359c0 | 236 | struct lttng_ht_iter iter; |
bec39940 | 237 | struct lttng_ht *chan_ht; |
55cc08a6 | 238 | struct ltt_ust_channel *uchan = NULL; |
2bdd86d4 | 239 | |
0525e9ae DG |
240 | assert(usess); |
241 | assert(ctx); | |
242 | assert(channel_name); | |
243 | ||
2223c96f DG |
244 | rcu_read_lock(); |
245 | ||
6b79ed20 DG |
246 | /* |
247 | * Define which channel's hashtable to use from the domain or quit if | |
248 | * unknown domain. | |
249 | */ | |
55cc08a6 DG |
250 | switch (domain) { |
251 | case LTTNG_DOMAIN_UST: | |
252 | chan_ht = usess->domain_global.channels; | |
253 | break; | |
d78d6610 | 254 | #if 0 |
55cc08a6 DG |
255 | case LTTNG_DOMAIN_UST_EXEC_NAME: |
256 | case LTTNG_DOMAIN_UST_PID: | |
257 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
d78d6610 | 258 | #endif |
55cc08a6 | 259 | default: |
f73fabfd | 260 | ret = LTTNG_ERR_UND; |
2bdd86d4 MD |
261 | goto error; |
262 | } | |
2bdd86d4 | 263 | |
55cc08a6 | 264 | /* Get UST channel if defined */ |
9f9ee9c9 | 265 | if (channel_name[0] != '\0') { |
55cc08a6 DG |
266 | uchan = trace_ust_find_channel_by_name(chan_ht, channel_name); |
267 | if (uchan == NULL) { | |
f73fabfd | 268 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2bdd86d4 MD |
269 | goto error; |
270 | } | |
55cc08a6 DG |
271 | } |
272 | ||
601d5acf DG |
273 | if (uchan) { |
274 | /* Add ctx to channel */ | |
6b79ed20 | 275 | ret = add_uctx_to_channel(usess, domain, uchan, ctx); |
601d5acf | 276 | } else { |
e7fe706f | 277 | rcu_read_lock(); |
601d5acf | 278 | /* Add ctx all events, all channels */ |
bec39940 | 279 | cds_lfht_for_each_entry(chan_ht->ht, &iter.iter, uchan, node.node) { |
6b79ed20 | 280 | ret = add_uctx_to_channel(usess, domain, uchan, ctx); |
55cc08a6 | 281 | if (ret < 0) { |
ae856491 | 282 | ERR("Context failed for channel %s", uchan->name); |
55cc08a6 DG |
283 | continue; |
284 | } | |
2bdd86d4 | 285 | } |
e7fe706f | 286 | rcu_read_unlock(); |
55cc08a6 | 287 | } |
2bdd86d4 | 288 | |
55cc08a6 DG |
289 | switch (ret) { |
290 | case -EEXIST: | |
f73fabfd | 291 | ret = LTTNG_ERR_UST_CONTEXT_EXIST; |
727d5404 | 292 | break; |
55cc08a6 | 293 | case -ENOMEM: |
f73fabfd | 294 | ret = LTTNG_ERR_FATAL; |
727d5404 DG |
295 | break; |
296 | case -EINVAL: | |
f73fabfd | 297 | ret = LTTNG_ERR_UST_CONTEXT_INVAL; |
727d5404 DG |
298 | break; |
299 | case -ENOSYS: | |
f73fabfd | 300 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
727d5404 DG |
301 | break; |
302 | default: | |
f73fabfd | 303 | ret = LTTNG_OK; |
727d5404 | 304 | break; |
2bdd86d4 MD |
305 | } |
306 | ||
2bdd86d4 | 307 | error: |
2223c96f | 308 | rcu_read_unlock(); |
2bdd86d4 MD |
309 | return ret; |
310 | } |