Commit | Line | Data |
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00e2e675 DG |
1 | /* |
2 | * Copyright (C) 2012 - David Goulet <dgoulet@efficios.com> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms of the GNU General Public License, version 2 only, as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
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. | |
12 | * | |
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., 51 | |
15 | * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
16 | */ | |
17 | ||
18 | #define _GNU_SOURCE | |
19 | #include <assert.h> | |
20 | #include <stdio.h> | |
21 | #include <stdlib.h> | |
22 | #include <string.h> | |
23 | #include <sys/stat.h> | |
24 | #include <sys/types.h> | |
25 | #include <unistd.h> | |
26 | ||
27 | #include <common/common.h> | |
28 | #include <common/defaults.h> | |
29 | #include <common/uri.h> | |
30 | ||
31 | #include "consumer.h" | |
32 | ||
33 | /* | |
34 | * Allocate and assign data to a consumer_output object. | |
35 | * | |
36 | * Return pointer to structure. | |
37 | */ | |
38 | struct consumer_output *consumer_create_output(enum consumer_dst_type type) | |
39 | { | |
40 | struct consumer_output *output = NULL; | |
41 | ||
42 | output = zmalloc(sizeof(struct consumer_output)); | |
43 | if (output == NULL) { | |
44 | PERROR("zmalloc consumer_output"); | |
45 | goto error; | |
46 | } | |
47 | ||
48 | /* By default, consumer output is enabled */ | |
49 | output->enabled = 1; | |
50 | output->type = type; | |
51 | output->net_seq_index = -1; | |
52 | /* | |
53 | * Important to keep it to a negative value on creation since it was zeroed | |
54 | * during allocation and the file descriptor 0 is a valid one. | |
55 | */ | |
56 | output->sock = -1; | |
57 | ||
58 | error: | |
59 | return output; | |
60 | } | |
61 | ||
62 | /* | |
63 | * Delete the consumer_output object from the list and free the ptr. | |
64 | */ | |
65 | void consumer_destroy_output(struct consumer_output *obj) | |
66 | { | |
67 | if (obj == NULL) { | |
68 | return; | |
69 | } | |
70 | ||
71 | if (obj->sock >= 0) { | |
72 | (void) close(obj->sock); | |
73 | } | |
74 | free(obj); | |
75 | } | |
76 | ||
77 | /* | |
78 | * Copy consumer output and returned the newly allocated copy. | |
79 | */ | |
80 | struct consumer_output *consumer_copy_output(struct consumer_output *obj) | |
81 | { | |
82 | struct consumer_output *output; | |
83 | ||
84 | assert(obj); | |
85 | ||
86 | output = consumer_create_output(obj->type); | |
87 | if (output == NULL) { | |
88 | goto error; | |
89 | } | |
90 | ||
91 | memcpy(output, obj, sizeof(struct consumer_output)); | |
92 | ||
93 | error: | |
94 | return output; | |
95 | } | |
96 | ||
97 | /* | |
98 | * Set network URI to the consumer output object. | |
99 | * | |
100 | * Return 0 on success. Negative value on error. | |
101 | */ | |
102 | int consumer_set_network_uri(struct consumer_output *obj, | |
103 | struct lttng_uri *uri) | |
104 | { | |
105 | int ret; | |
106 | char tmp_path[PATH_MAX]; | |
107 | char hostname[HOST_NAME_MAX]; | |
108 | struct lttng_uri *dst_uri = NULL; | |
109 | ||
110 | /* Code flow error safety net. */ | |
111 | assert(obj); | |
112 | assert(uri); | |
113 | ||
114 | switch (uri->stype) { | |
115 | case LTTNG_STREAM_CONTROL: | |
116 | dst_uri = &obj->dst.net.control; | |
117 | obj->dst.net.control_isset = 1; | |
118 | if (uri->port == 0) { | |
119 | /* Assign default port. */ | |
120 | uri->port = DEFAULT_NETWORK_CONTROL_PORT; | |
121 | } | |
122 | break; | |
123 | case LTTNG_STREAM_DATA: | |
124 | dst_uri = &obj->dst.net.data; | |
125 | obj->dst.net.data_isset = 1; | |
126 | if (uri->port == 0) { | |
127 | /* Assign default port. */ | |
128 | uri->port = DEFAULT_NETWORK_DATA_PORT; | |
129 | } | |
130 | break; | |
131 | default: | |
132 | ERR("Set network uri type unknown %d", uri->stype); | |
133 | goto error; | |
134 | } | |
135 | ||
136 | ret = uri_compare(dst_uri, uri); | |
137 | if (!ret) { | |
138 | /* Same URI, don't touch it and return success. */ | |
139 | DBG3("URI network compare are the same"); | |
140 | goto end; | |
141 | } | |
142 | ||
143 | /* URIs were not equal, replacing it. */ | |
144 | memset(dst_uri, 0, sizeof(struct lttng_uri)); | |
145 | memcpy(dst_uri, uri, sizeof(struct lttng_uri)); | |
146 | obj->type = CONSUMER_DST_NET; | |
147 | ||
148 | /* Handle subdir and add hostname in front. */ | |
149 | if (dst_uri->stype == LTTNG_STREAM_CONTROL) { | |
150 | /* Get hostname to append it in the pathname */ | |
151 | ret = gethostname(hostname, sizeof(hostname)); | |
152 | if (ret < 0) { | |
153 | PERROR("gethostname. Fallback on default localhost"); | |
154 | strncpy(hostname, "localhost", sizeof(hostname)); | |
155 | } | |
156 | hostname[sizeof(hostname) - 1] = '\0'; | |
157 | ||
158 | /* Setup consumer subdir if none present in the control URI */ | |
159 | if (strlen(dst_uri->subdir) == 0) { | |
160 | ret = snprintf(tmp_path, sizeof(tmp_path), "%s/%s", | |
161 | hostname, obj->subdir); | |
162 | } else { | |
163 | ret = snprintf(tmp_path, sizeof(tmp_path), "%s/%s", | |
164 | hostname, dst_uri->subdir); | |
165 | } | |
166 | if (ret < 0) { | |
167 | PERROR("snprintf set consumer uri subdir"); | |
168 | goto error; | |
169 | } | |
170 | ||
171 | strncpy(obj->subdir, tmp_path, sizeof(obj->subdir)); | |
172 | DBG3("Consumer set network uri subdir path %s", tmp_path); | |
173 | } | |
174 | ||
175 | end: | |
176 | return 0; | |
177 | ||
178 | error: | |
179 | return -1; | |
180 | } | |
181 | ||
182 | /* | |
183 | * Send file descriptor to consumer via sock. | |
184 | */ | |
185 | int consumer_send_fds(int sock, int *fds, size_t nb_fd) | |
186 | { | |
187 | int ret; | |
188 | ||
189 | assert(fds); | |
190 | assert(nb_fd > 0); | |
191 | ||
192 | ret = lttcomm_send_fds_unix_sock(sock, fds, nb_fd); | |
193 | if (ret < 0) { | |
194 | PERROR("send consumer fds"); | |
195 | goto error; | |
196 | } | |
197 | ||
198 | error: | |
199 | return ret; | |
200 | } | |
201 | ||
202 | /* | |
203 | * Consumer send channel communication message structure to consumer. | |
204 | */ | |
205 | int consumer_send_channel(int sock, struct lttcomm_consumer_msg *msg) | |
206 | { | |
207 | int ret; | |
208 | ||
209 | assert(msg); | |
210 | assert(sock >= 0); | |
211 | ||
212 | ret = lttcomm_send_unix_sock(sock, msg, | |
213 | sizeof(struct lttcomm_consumer_msg)); | |
214 | if (ret < 0) { | |
215 | PERROR("send consumer channel"); | |
216 | goto error; | |
217 | } | |
218 | ||
219 | error: | |
220 | return ret; | |
221 | } | |
222 | ||
223 | /* | |
224 | * Init channel communication message structure. | |
225 | */ | |
226 | void consumer_init_channel_comm_msg(struct lttcomm_consumer_msg *msg, | |
227 | enum lttng_consumer_command cmd, | |
228 | int channel_key, | |
229 | uint64_t max_sb_size, | |
230 | uint64_t mmap_len, | |
231 | const char *name) | |
232 | { | |
233 | assert(msg); | |
234 | ||
235 | /* TODO: Args validation */ | |
236 | ||
237 | /* Zeroed structure */ | |
238 | memset(msg, 0, sizeof(struct lttcomm_consumer_msg)); | |
239 | ||
240 | /* Send channel */ | |
241 | msg->cmd_type = cmd; | |
242 | msg->u.channel.channel_key = channel_key; | |
243 | msg->u.channel.max_sb_size = max_sb_size; | |
244 | msg->u.channel.mmap_len = mmap_len; | |
245 | } | |
246 | ||
247 | /* | |
248 | * Init stream communication message structure. | |
249 | */ | |
250 | void consumer_init_stream_comm_msg(struct lttcomm_consumer_msg *msg, | |
251 | enum lttng_consumer_command cmd, | |
252 | int channel_key, | |
253 | int stream_key, | |
254 | uint32_t state, | |
255 | enum lttng_event_output output, | |
256 | uint64_t mmap_len, | |
257 | uid_t uid, | |
258 | gid_t gid, | |
259 | int net_index, | |
260 | unsigned int metadata_flag, | |
261 | const char *name, | |
262 | const char *pathname) | |
263 | { | |
264 | assert(msg); | |
265 | ||
266 | memset(msg, 0, sizeof(struct lttcomm_consumer_msg)); | |
267 | ||
268 | /* TODO: Args validation */ | |
269 | ||
270 | msg->cmd_type = cmd; | |
271 | msg->u.stream.channel_key = channel_key; | |
272 | msg->u.stream.stream_key = stream_key; | |
273 | msg->u.stream.state = state; | |
274 | msg->u.stream.output = output; | |
275 | msg->u.stream.mmap_len = mmap_len; | |
276 | msg->u.stream.uid = uid; | |
277 | msg->u.stream.gid = gid; | |
278 | msg->u.stream.net_index = net_index; | |
279 | msg->u.stream.metadata_flag = metadata_flag; | |
280 | strncpy(msg->u.stream.name, name, sizeof(msg->u.stream.name)); | |
281 | msg->u.stream.name[sizeof(msg->u.stream.name) - 1] = '\0'; | |
282 | strncpy(msg->u.stream.path_name, pathname, | |
283 | sizeof(msg->u.stream.path_name)); | |
284 | msg->u.stream.path_name[sizeof(msg->u.stream.path_name) - 1] = '\0'; | |
285 | } | |
286 | ||
287 | /* | |
288 | * Send stream communication structure to the consumer. | |
289 | */ | |
290 | int consumer_send_stream(int sock, struct consumer_output *dst, | |
291 | struct lttcomm_consumer_msg *msg, int *fds, size_t nb_fd) | |
292 | { | |
293 | int ret; | |
294 | ||
295 | assert(msg); | |
296 | assert(dst); | |
297 | ||
298 | switch (dst->type) { | |
299 | case CONSUMER_DST_NET: | |
300 | /* Consumer should send the stream on the network. */ | |
301 | msg->u.stream.net_index = dst->net_seq_index; | |
302 | break; | |
303 | case CONSUMER_DST_LOCAL: | |
304 | /* Add stream file name to stream path */ | |
305 | strncat(msg->u.stream.path_name, "/", sizeof(msg->u.stream.path_name)); | |
306 | strncat(msg->u.stream.path_name, msg->u.stream.name, | |
307 | sizeof(msg->u.stream.path_name)); | |
308 | msg->u.stream.path_name[sizeof(msg->u.stream.path_name) - 1] = '\0'; | |
309 | /* Indicate that the stream is NOT network */ | |
310 | msg->u.stream.net_index = -1; | |
311 | break; | |
312 | default: | |
313 | ERR("Consumer unknown output type (%d)", dst->type); | |
314 | ret = -1; | |
315 | goto error; | |
316 | } | |
317 | ||
318 | /* Send on socket */ | |
319 | ret = lttcomm_send_unix_sock(sock, msg, | |
320 | sizeof(struct lttcomm_consumer_msg)); | |
321 | if (ret < 0) { | |
322 | PERROR("send consumer stream"); | |
323 | goto error; | |
324 | } | |
325 | ||
326 | ret = consumer_send_fds(sock, fds, nb_fd); | |
327 | if (ret < 0) { | |
328 | goto error; | |
329 | } | |
330 | ||
331 | error: | |
332 | return ret; | |
333 | } |