Commit | Line | Data |
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b579acd9 DG |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
3 | * | |
1e307fab DG |
4 | * This program is free software; you can redistribute it and/or modify it |
5 | * under the terms of the GNU General Public License as published by the Free | |
6 | * Software Foundation; only version 2 of the License. | |
b579acd9 | 7 | * |
1e307fab DG |
8 | * This program is distributed in the hope that it will be useful, but WITHOUT |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
b579acd9 | 12 | * |
1e307fab DG |
13 | * You should have received a copy of the GNU General Public License along with |
14 | * this program; if not, write to the Free Software Foundation, Inc., 59 Temple | |
15 | * Place - Suite 330, Boston, MA 02111-1307, 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 DG |
24 | |
25 | #include <lttng-sessiond-comm.h> | |
54d01ffb | 26 | #include <lttngerr.h> |
b579acd9 | 27 | |
b579acd9 | 28 | #include "context.h" |
48842b30 | 29 | #include "hashtable.h" |
1e307fab | 30 | #include "kernel-ctl.h" |
b579acd9 DG |
31 | |
32 | /* | |
33 | * Add kernel context to an event of a specific channel. | |
34 | */ | |
35 | static int add_kctx_to_event(struct lttng_kernel_context *kctx, | |
36 | struct ltt_kernel_channel *kchan, char *event_name) | |
37 | { | |
38 | int ret, found = 0; | |
39 | struct ltt_kernel_event *kevent; | |
40 | ||
41 | DBG("Add kernel context to event %s", event_name); | |
42 | ||
62499ad6 | 43 | kevent = trace_kernel_get_event_by_name(event_name, kchan); |
b579acd9 DG |
44 | if (kevent != NULL) { |
45 | ret = kernel_add_event_context(kevent, kctx); | |
46 | if (ret < 0) { | |
47 | goto error; | |
48 | } | |
49 | found = 1; | |
50 | } | |
51 | ||
52 | ret = found; | |
53 | ||
54 | error: | |
55 | return ret; | |
56 | } | |
57 | ||
58 | /* | |
59 | * Add kernel context to all channel. | |
60 | * | |
61 | * If event_name is specified, add context to event instead. | |
62 | */ | |
63 | static int add_kctx_all_channels(struct ltt_kernel_session *ksession, | |
64 | struct lttng_kernel_context *kctx, char *event_name) | |
65 | { | |
66 | int ret, no_event = 0, found = 0; | |
67 | struct ltt_kernel_channel *kchan; | |
68 | ||
69 | if (strlen(event_name) == 0) { | |
70 | no_event = 1; | |
71 | } | |
72 | ||
73 | DBG("Adding kernel context to all channels (event: %s)", event_name); | |
74 | ||
75 | /* Go over all channels */ | |
76 | cds_list_for_each_entry(kchan, &ksession->channel_list.head, list) { | |
77 | if (no_event) { | |
78 | ret = kernel_add_channel_context(kchan, kctx); | |
79 | if (ret < 0) { | |
80 | ret = LTTCOMM_KERN_CONTEXT_FAIL; | |
81 | goto error; | |
82 | } | |
83 | } else { | |
84 | ret = add_kctx_to_event(kctx, kchan, event_name); | |
85 | if (ret < 0) { | |
86 | ret = LTTCOMM_KERN_CONTEXT_FAIL; | |
87 | goto error; | |
88 | } else if (ret == 1) { | |
89 | /* Event found and context added */ | |
90 | found = 1; | |
91 | break; | |
92 | } | |
93 | } | |
94 | } | |
95 | ||
96 | if (!found && !no_event) { | |
97 | ret = LTTCOMM_NO_EVENT; | |
98 | goto error; | |
99 | } | |
100 | ||
101 | ret = LTTCOMM_OK; | |
102 | ||
103 | error: | |
104 | return ret; | |
105 | } | |
106 | ||
107 | /* | |
108 | * Add kernel context to a specific channel. | |
109 | * | |
110 | * If event_name is specified, add context to that event. | |
111 | */ | |
112 | static int add_kctx_to_channel(struct lttng_kernel_context *kctx, | |
113 | struct ltt_kernel_channel *kchan, char *event_name) | |
114 | { | |
115 | int ret, no_event = 0, found = 0; | |
116 | ||
117 | if (strlen(event_name) == 0) { | |
118 | no_event = 1; | |
119 | } | |
120 | ||
121 | DBG("Add kernel context to channel '%s', event '%s'", | |
122 | kchan->channel->name, event_name); | |
123 | ||
124 | if (no_event) { | |
125 | ret = kernel_add_channel_context(kchan, kctx); | |
126 | if (ret < 0) { | |
127 | ret = LTTCOMM_KERN_CONTEXT_FAIL; | |
128 | goto error; | |
129 | } | |
130 | } else { | |
131 | ret = add_kctx_to_event(kctx, kchan, event_name); | |
132 | if (ret < 0) { | |
133 | ret = LTTCOMM_KERN_CONTEXT_FAIL; | |
134 | goto error; | |
135 | } else if (ret == 1) { | |
136 | /* Event found and context added */ | |
137 | found = 1; | |
138 | } | |
139 | } | |
140 | ||
141 | if (!found && !no_event) { | |
142 | ret = LTTCOMM_NO_EVENT; | |
143 | goto error; | |
144 | } | |
145 | ||
146 | ret = LTTCOMM_OK; | |
147 | ||
148 | error: | |
149 | return ret; | |
150 | } | |
151 | ||
152 | /* | |
153 | * Add kernel context to tracer. | |
154 | */ | |
54d01ffb DG |
155 | int context_kernel_add(struct ltt_kernel_session *ksession, |
156 | struct lttng_event_context *ctx, char *event_name, | |
b579acd9 DG |
157 | char *channel_name) |
158 | { | |
159 | int ret; | |
160 | struct ltt_kernel_channel *kchan; | |
54d01ffb DG |
161 | struct lttng_kernel_context kctx; |
162 | ||
163 | /* Setup kernel context structure */ | |
164 | kctx.ctx = ctx->ctx; | |
165 | kctx.u.perf_counter.type = ctx->u.perf_counter.type; | |
166 | kctx.u.perf_counter.config = ctx->u.perf_counter.config; | |
167 | strncpy(kctx.u.perf_counter.name, ctx->u.perf_counter.name, | |
168 | LTTNG_SYMBOL_NAME_LEN); | |
169 | kctx.u.perf_counter.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
b579acd9 DG |
170 | |
171 | if (strlen(channel_name) == 0) { | |
54d01ffb | 172 | ret = add_kctx_all_channels(ksession, &kctx, event_name); |
b579acd9 DG |
173 | if (ret != LTTCOMM_OK) { |
174 | goto error; | |
175 | } | |
176 | } else { | |
177 | /* Get kernel channel */ | |
62499ad6 | 178 | kchan = trace_kernel_get_channel_by_name(channel_name, ksession); |
b579acd9 DG |
179 | if (kchan == NULL) { |
180 | ret = LTTCOMM_KERN_CHAN_NOT_FOUND; | |
181 | goto error; | |
182 | } | |
183 | ||
54d01ffb | 184 | ret = add_kctx_to_channel(&kctx, kchan, event_name); |
b579acd9 DG |
185 | if (ret != LTTCOMM_OK) { |
186 | goto error; | |
187 | } | |
188 | } | |
189 | ||
190 | ret = LTTCOMM_OK; | |
191 | ||
192 | error: | |
193 | return ret; | |
194 | } | |
2bdd86d4 MD |
195 | |
196 | /* | |
197 | * UST support. | |
198 | */ | |
199 | ||
200 | /* | |
201 | * Add UST context to an event of a specific channel. | |
202 | */ | |
48842b30 | 203 | #ifdef DISABLE |
2bdd86d4 MD |
204 | static int add_ustctx_to_event(struct ltt_ust_session *ustsession, |
205 | struct lttng_ust_context *ustctx, | |
206 | struct ltt_ust_channel *ustchan, char *event_name) | |
207 | { | |
208 | int ret, found = 0; | |
209 | struct ltt_ust_event *ustevent; | |
210 | struct object_data *context_data; /* FIXME: currently a memleak */ | |
211 | ||
212 | DBG("Add UST context to event %s", event_name); | |
213 | ||
48842b30 | 214 | ustevent = trace_ust_find_event_by_name(ustchan->events, event_name); |
2bdd86d4 MD |
215 | if (ustevent != NULL) { |
216 | ret = ustctl_add_context(ustsession->sock, ustctx, | |
217 | ustevent->obj, &context_data); | |
218 | if (ret < 0) { | |
219 | goto error; | |
220 | } | |
221 | found = 1; | |
222 | } | |
223 | ||
224 | ret = found; | |
225 | ||
226 | error: | |
227 | return ret; | |
228 | } | |
48842b30 | 229 | #endif |
2bdd86d4 MD |
230 | |
231 | /* | |
232 | * Add UST context to all channel. | |
233 | * | |
234 | * If event_name is specified, add context to event instead. | |
235 | */ | |
236 | static int add_ustctx_all_channels(struct ltt_ust_session *ustsession, | |
48842b30 DG |
237 | struct lttng_ust_context *ustctx, char *event_name, |
238 | struct cds_lfht *channels) | |
2bdd86d4 | 239 | { |
48842b30 | 240 | #ifdef DISABLE |
2bdd86d4 MD |
241 | int ret, no_event = 0, found = 0; |
242 | struct ltt_ust_channel *ustchan; | |
243 | struct object_data *context_data; /* FIXME: currently a memleak */ | |
244 | ||
245 | if (strlen(event_name) == 0) { | |
246 | no_event = 1; | |
247 | } | |
248 | ||
249 | DBG("Adding ust context to all channels (event: %s)", event_name); | |
250 | ||
48842b30 DG |
251 | struct cds_lfht_node *node; |
252 | struct cds_lfht_iter iter; | |
253 | ||
254 | rcu_read_lock(); | |
255 | hashtable_get_first(channels, &iter); | |
256 | while ((node = hashtable_iter_get_node(&iter)) != NULL) { | |
257 | ustchan = caa_container_of(node, struct ltt_ust_channel, node); | |
2bdd86d4 | 258 | if (no_event) { |
48842b30 DG |
259 | //ret = ustctl_add_context(ustsession->sock, |
260 | // ustctx, ustchan->obj, &context_data); | |
2bdd86d4 MD |
261 | if (ret < 0) { |
262 | ret = LTTCOMM_UST_CONTEXT_FAIL; | |
263 | goto error; | |
264 | } | |
265 | } else { | |
266 | ret = add_ustctx_to_event(ustsession, ustctx, ustchan, event_name); | |
267 | if (ret < 0) { | |
268 | ret = LTTCOMM_UST_CONTEXT_FAIL; | |
269 | goto error; | |
270 | } else if (ret == 1) { | |
271 | /* Event found and context added */ | |
272 | found = 1; | |
273 | break; | |
274 | } | |
275 | } | |
48842b30 | 276 | hashtable_get_next(channels, &iter); |
2bdd86d4 | 277 | } |
2bdd86d4 MD |
278 | if (!found && !no_event) { |
279 | ret = LTTCOMM_NO_EVENT; | |
280 | goto error; | |
281 | } | |
2bdd86d4 | 282 | ret = LTTCOMM_OK; |
2bdd86d4 | 283 | error: |
8ae38be7 | 284 | rcu_read_unlock(); |
2bdd86d4 | 285 | return ret; |
48842b30 DG |
286 | #endif |
287 | return 0; | |
2bdd86d4 MD |
288 | } |
289 | ||
290 | /* | |
291 | * Add UST context to a specific channel. | |
292 | * | |
293 | * If event_name is specified, add context to that event. | |
294 | */ | |
295 | static int add_ustctx_to_channel(struct ltt_ust_session *ustsession, | |
296 | struct lttng_ust_context *ustctx, | |
297 | struct ltt_ust_channel *ustchan, char *event_name) | |
298 | { | |
48842b30 | 299 | #ifdef DISABLE |
2bdd86d4 MD |
300 | int ret, no_event = 0, found = 0; |
301 | struct object_data *context_data; /* FIXME: currently a memleak */ | |
302 | ||
303 | if (strlen(event_name) == 0) { | |
304 | no_event = 1; | |
305 | } | |
306 | ||
307 | DBG("Add UST context to channel '%s', event '%s'", | |
308 | ustchan->name, event_name); | |
309 | ||
310 | if (no_event) { | |
48842b30 DG |
311 | //ret = ustctl_add_context(ustsession->sock, ustctx, |
312 | // ustchan->obj, &context_data); | |
2bdd86d4 MD |
313 | if (ret < 0) { |
314 | ret = LTTCOMM_UST_CONTEXT_FAIL; | |
315 | goto error; | |
316 | } | |
317 | } else { | |
318 | ret = add_ustctx_to_event(ustsession, ustctx, ustchan, event_name); | |
319 | if (ret < 0) { | |
320 | ret = LTTCOMM_UST_CONTEXT_FAIL; | |
321 | goto error; | |
322 | } else if (ret == 1) { | |
323 | /* Event found and context added */ | |
324 | found = 1; | |
325 | } | |
326 | } | |
327 | ||
328 | if (!found && !no_event) { | |
329 | ret = LTTCOMM_NO_EVENT; | |
330 | goto error; | |
331 | } | |
332 | ||
333 | ret = LTTCOMM_OK; | |
334 | ||
335 | error: | |
336 | return ret; | |
48842b30 DG |
337 | #endif |
338 | return 0; | |
2bdd86d4 MD |
339 | } |
340 | ||
341 | /* | |
342 | * Add UST context to tracer. | |
343 | */ | |
344 | int context_ust_add(struct ltt_ust_session *ustsession, | |
345 | struct lttng_event_context *ctx, char *event_name, | |
48842b30 | 346 | char *channel_name, int domain) |
2bdd86d4 MD |
347 | { |
348 | int ret; | |
48842b30 | 349 | struct cds_lfht *chan_ht = NULL; |
2bdd86d4 MD |
350 | struct ltt_ust_channel *ustchan; |
351 | struct lttng_ust_context ustctx; | |
352 | ||
353 | /* Setup UST context structure */ | |
354 | ustctx.ctx = ctx->ctx; | |
355 | ||
48842b30 DG |
356 | switch (domain) { |
357 | case LTTNG_DOMAIN_UST: | |
358 | chan_ht = ustsession->domain_global.channels; | |
359 | break; | |
360 | } | |
361 | ||
2bdd86d4 | 362 | if (strlen(channel_name) == 0) { |
48842b30 | 363 | ret = add_ustctx_all_channels(ustsession, &ustctx, event_name, chan_ht); |
2bdd86d4 MD |
364 | if (ret != LTTCOMM_OK) { |
365 | goto error; | |
366 | } | |
367 | } else { | |
368 | /* Get UST channel */ | |
48842b30 | 369 | ustchan = trace_ust_find_channel_by_name(chan_ht, channel_name); |
2bdd86d4 MD |
370 | if (ustchan == NULL) { |
371 | ret = LTTCOMM_UST_CHAN_NOT_FOUND; | |
372 | goto error; | |
373 | } | |
374 | ||
375 | ret = add_ustctx_to_channel(ustsession, &ustctx, ustchan, event_name); | |
376 | if (ret != LTTCOMM_OK) { | |
377 | goto error; | |
378 | } | |
379 | } | |
380 | ||
381 | ret = LTTCOMM_OK; | |
382 | ||
383 | error: | |
384 | return ret; | |
385 | } |