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