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