Commit | Line | Data |
---|---|---|
826d496d | 1 | /* |
917216f6 DG |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> |
3 | * Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
fac6795d | 4 | * |
d14d33bf AM |
5 | * This program is free software; you can redistribute it and/or modify |
6 | * it under the terms of the GNU General Public License, version 2 only, | |
7 | * as published by the Free Software Foundation. | |
fac6795d | 8 | * |
917216f6 DG |
9 | * This program is distributed in the hope that it will be useful, but WITHOUT |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
fac6795d | 13 | * |
d14d33bf AM |
14 | * You should have received a copy of the GNU General Public License along |
15 | * with this program; if not, write to the Free Software Foundation, Inc., | |
16 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
fac6795d DG |
17 | */ |
18 | ||
19 | #define _GNU_SOURCE | |
1e307fab | 20 | #include <assert.h> |
fac6795d DG |
21 | #include <limits.h> |
22 | #include <stdio.h> | |
23 | #include <stdlib.h> | |
24 | #include <string.h> | |
fac6795d DG |
25 | #include <sys/stat.h> |
26 | #include <sys/types.h> | |
fac6795d | 27 | #include <unistd.h> |
3bd1e081 | 28 | #include <errno.h> |
fac6795d | 29 | |
990570ed | 30 | #include <common/defaults.h> |
4c462e79 | 31 | #include <common/error.h> |
990570ed | 32 | |
10a8a223 | 33 | #include "sessiond-comm.h" |
fac6795d | 34 | |
6364a07a DG |
35 | /* For Unix socket */ |
36 | #include "unix.h" | |
37 | /* For Inet socket */ | |
38 | #include "inet.h" | |
39 | /* For Inet6 socket */ | |
40 | #include "inet6.h" | |
41 | ||
42 | struct lttcomm_net_family net_families[] = { | |
43 | { LTTCOMM_INET, lttcomm_create_inet_sock }, | |
44 | { LTTCOMM_INET6, lttcomm_create_inet6_sock }, | |
45 | }; | |
46 | ||
fac6795d DG |
47 | /* |
48 | * Human readable error message. | |
49 | */ | |
50 | static const char *lttcomm_readable_code[] = { | |
51 | [ LTTCOMM_ERR_INDEX(LTTCOMM_OK) ] = "Success", | |
52 | [ LTTCOMM_ERR_INDEX(LTTCOMM_ERR) ] = "Unknown error", | |
53 | [ LTTCOMM_ERR_INDEX(LTTCOMM_UND) ] = "Undefined command", | |
7d29a247 DG |
54 | [ LTTCOMM_ERR_INDEX(LTTCOMM_NOT_IMPLEMENTED) ] = "Not implemented", |
55 | [ LTTCOMM_ERR_INDEX(LTTCOMM_UNKNOWN_DOMAIN) ] = "Unknown tracing domain", | |
fac6795d DG |
56 | [ LTTCOMM_ERR_INDEX(LTTCOMM_NO_SESSION) ] = "No session found", |
57 | [ LTTCOMM_ERR_INDEX(LTTCOMM_LIST_FAIL) ] = "Unable to list traceable apps", | |
e065084a | 58 | [ LTTCOMM_ERR_INDEX(LTTCOMM_NO_APPS) ] = "No traceable apps found", |
f3ed775e | 59 | [ LTTCOMM_ERR_INDEX(LTTCOMM_SESS_NOT_FOUND) ] = "Session name not found", |
ce3d728c | 60 | [ LTTCOMM_ERR_INDEX(LTTCOMM_NO_TRACE) ] = "No trace found", |
ca95a216 | 61 | [ LTTCOMM_ERR_INDEX(LTTCOMM_FATAL) ] = "Fatal error of the session daemon", |
ae856491 | 62 | [ LTTCOMM_ERR_INDEX(LTTCOMM_CREATE_DIR_FAIL) ] = "Create directory failed", |
379473d2 | 63 | [ LTTCOMM_ERR_INDEX(LTTCOMM_START_FAIL) ] = "Start trace failed", |
520ff687 | 64 | [ LTTCOMM_ERR_INDEX(LTTCOMM_STOP_FAIL) ] = "Stop trace failed", |
379473d2 DG |
65 | [ LTTCOMM_ERR_INDEX(LTTCOMM_NO_TRACEABLE) ] = "App is not traceable", |
66 | [ LTTCOMM_ERR_INDEX(LTTCOMM_SELECT_SESS) ] = "A session MUST be selected", | |
27673bb6 | 67 | [ LTTCOMM_ERR_INDEX(LTTCOMM_EXIST_SESS) ] = "Session name already exist", |
d9800920 | 68 | [ LTTCOMM_ERR_INDEX(LTTCOMM_CONNECT_FAIL) ] = "Unable to connect to Unix socket", |
2b0bf864 | 69 | [ LTTCOMM_ERR_INDEX(LTTCOMM_APP_NOT_FOUND) ] = "Application not found", |
8e0af1b4 | 70 | [ LTTCOMM_ERR_INDEX(LTTCOMM_EPERM) ] = "Permission denied", |
20fe2104 | 71 | [ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_NA) ] = "Kernel tracer not available", |
394016d1 | 72 | [ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_VERSION) ] = "Kernel tracer version is not compatible", |
7d29a247 | 73 | [ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_EVENT_EXIST) ] = "Kernel event already exists", |
20fe2104 | 74 | [ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_SESS_FAIL) ] = "Kernel create session failed", |
42224349 | 75 | [ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_CHAN_EXIST) ] = "Kernel channel already exists", |
20fe2104 | 76 | [ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_CHAN_FAIL) ] = "Kernel create channel failed", |
f3ed775e | 77 | [ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_CHAN_NOT_FOUND) ] = "Kernel channel not found", |
26cc6b4e | 78 | [ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_CHAN_DISABLE_FAIL) ] = "Disable kernel channel failed", |
d36b8583 | 79 | [ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_CHAN_ENABLE_FAIL) ] = "Enable kernel channel failed", |
d65106b1 | 80 | [ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_CONTEXT_FAIL) ] = "Add kernel context failed", |
f34daff7 DG |
81 | [ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_ENABLE_FAIL) ] = "Enable kernel event failed", |
82 | [ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_DISABLE_FAIL) ] = "Disable kernel event failed", | |
aaf26714 | 83 | [ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_META_FAIL) ] = "Opening metadata failed", |
8c0faa1d DG |
84 | [ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_START_FAIL) ] = "Starting kernel trace failed", |
85 | [ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_STOP_FAIL) ] = "Stoping kernel trace failed", | |
86 | [ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_CONSUMER_FAIL) ] = "Kernel consumer start failed", | |
87 | [ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_STREAM_FAIL) ] = "Kernel create stream failed", | |
88 | [ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_DIR_FAIL) ] = "Kernel trace directory creation failed", | |
89 | [ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_DIR_EXIST) ] = "Kernel trace directory already exist", | |
84291629 | 90 | [ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_NO_SESSION) ] = "No kernel session found", |
2ef84c95 | 91 | [ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_LIST_FAIL) ] = "Listing kernel events failed", |
4466912f | 92 | [ LTTCOMM_ERR_INDEX(LTTCOMM_UST_CALIBRATE_FAIL) ] = "UST calibration failed", |
e0c7ec2b | 93 | [ LTTCOMM_ERR_INDEX(LTTCOMM_UST_VERSION) ] = "UST tracer version is not compatible", |
0177d773 | 94 | [ LTTCOMM_ERR_INDEX(LTTCOMM_UST_SESS_FAIL) ] = "UST create session failed", |
2b0bf864 | 95 | [ LTTCOMM_ERR_INDEX(LTTCOMM_UST_CHAN_FAIL) ] = "UST create channel failed", |
f6a9efaa | 96 | [ LTTCOMM_ERR_INDEX(LTTCOMM_UST_CHAN_EXIST) ] = "UST channel already exist", |
2bdd86d4 MD |
97 | [ LTTCOMM_ERR_INDEX(LTTCOMM_UST_CHAN_NOT_FOUND) ] = "UST channel not found", |
98 | [ LTTCOMM_ERR_INDEX(LTTCOMM_UST_CHAN_DISABLE_FAIL) ] = "Disable UST channel failed", | |
99 | [ LTTCOMM_ERR_INDEX(LTTCOMM_UST_CHAN_ENABLE_FAIL) ] = "Enable UST channel failed", | |
100 | [ LTTCOMM_ERR_INDEX(LTTCOMM_UST_CONTEXT_FAIL) ] = "Add UST context failed", | |
101 | [ LTTCOMM_ERR_INDEX(LTTCOMM_UST_ENABLE_FAIL) ] = "Enable UST event failed", | |
102 | [ LTTCOMM_ERR_INDEX(LTTCOMM_UST_DISABLE_FAIL) ] = "Disable UST event failed", | |
103 | [ LTTCOMM_ERR_INDEX(LTTCOMM_UST_META_FAIL) ] = "Opening metadata failed", | |
104 | [ LTTCOMM_ERR_INDEX(LTTCOMM_UST_START_FAIL) ] = "Starting UST trace failed", | |
105 | [ LTTCOMM_ERR_INDEX(LTTCOMM_UST_STOP_FAIL) ] = "Stoping UST trace failed", | |
7753dea8 MD |
106 | [ LTTCOMM_ERR_INDEX(LTTCOMM_UST_CONSUMER64_FAIL) ] = "64-bit UST consumer start failed", |
107 | [ LTTCOMM_ERR_INDEX(LTTCOMM_UST_CONSUMER32_FAIL) ] = "32-bit UST consumer start failed", | |
2bdd86d4 MD |
108 | [ LTTCOMM_ERR_INDEX(LTTCOMM_UST_STREAM_FAIL) ] = "UST create stream failed", |
109 | [ LTTCOMM_ERR_INDEX(LTTCOMM_UST_DIR_FAIL) ] = "UST trace directory creation failed", | |
110 | [ LTTCOMM_ERR_INDEX(LTTCOMM_UST_DIR_EXIST) ] = "UST trace directory already exist", | |
111 | [ LTTCOMM_ERR_INDEX(LTTCOMM_UST_NO_SESSION) ] = "No UST session found", | |
112 | [ LTTCOMM_ERR_INDEX(LTTCOMM_UST_LIST_FAIL) ] = "Listing UST events failed", | |
3b25d04d | 113 | [ LTTCOMM_ERR_INDEX(LTTCOMM_UST_EVENT_EXIST) ] = "UST event already exist", |
be4f0921 | 114 | [ LTTCOMM_ERR_INDEX(LTTCOMM_UST_EVENT_NOT_FOUND)] = "UST event not found", |
ae357384 | 115 | [ LTTCOMM_ERR_INDEX(LTTCOMM_UST_CONTEXT_EXIST)] = "UST context already exist", |
ae856491 | 116 | [ LTTCOMM_ERR_INDEX(LTTCOMM_UST_CONTEXT_INVAL)] = "UST invalid context", |
30905cf4 | 117 | [ LTTCOMM_ERR_INDEX(LTTCOMM_NEED_ROOT_SESSIOND) ] = "Tracing the kernel requires a root lttng-sessiond daemon and \"tracing\" group user membership", |
80e327fa DG |
118 | [ LTTCOMM_ERR_INDEX(LTTCOMM_TRACE_ALREADY_STARTED) ] = "Tracing already started", |
119 | [ LTTCOMM_ERR_INDEX(LTTCOMM_TRACE_ALREADY_STOPPED) ] = "Tracing already stopped", | |
bd29c13d | 120 | [ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_EVENT_ENOSYS) ] = "Kernel event type not supported", |
80e327fa | 121 | |
3bd1e081 MD |
122 | [ LTTCOMM_ERR_INDEX(CONSUMERD_COMMAND_SOCK_READY) ] = "consumerd command socket ready", |
123 | [ LTTCOMM_ERR_INDEX(CONSUMERD_SUCCESS_RECV_FD) ] = "consumerd success on receiving fds", | |
124 | [ LTTCOMM_ERR_INDEX(CONSUMERD_ERROR_RECV_FD) ] = "consumerd error on receiving fds", | |
f2fc6720 | 125 | [ LTTCOMM_ERR_INDEX(CONSUMERD_ERROR_RECV_CMD) ] = "consumerd error on receiving command", |
3bd1e081 MD |
126 | [ LTTCOMM_ERR_INDEX(CONSUMERD_POLL_ERROR) ] = "consumerd error in polling thread", |
127 | [ LTTCOMM_ERR_INDEX(CONSUMERD_POLL_NVAL) ] = "consumerd polling on closed fd", | |
128 | [ LTTCOMM_ERR_INDEX(CONSUMERD_POLL_HUP) ] = "consumerd all fd hung up", | |
129 | [ LTTCOMM_ERR_INDEX(CONSUMERD_EXIT_SUCCESS) ] = "consumerd exiting normally", | |
130 | [ LTTCOMM_ERR_INDEX(CONSUMERD_EXIT_FAILURE) ] = "consumerd exiting on error", | |
131 | [ LTTCOMM_ERR_INDEX(CONSUMERD_OUTFD_ERROR) ] = "consumerd error opening the tracefile", | |
132 | [ LTTCOMM_ERR_INDEX(CONSUMERD_SPLICE_EBADF) ] = "consumerd splice EBADF", | |
133 | [ LTTCOMM_ERR_INDEX(CONSUMERD_SPLICE_EINVAL) ] = "consumerd splice EINVAL", | |
134 | [ LTTCOMM_ERR_INDEX(CONSUMERD_SPLICE_ENOMEM) ] = "consumerd splice ENOMEM", | |
135 | [ LTTCOMM_ERR_INDEX(CONSUMERD_SPLICE_ESPIPE) ] = "consumerd splice ESPIPE", | |
d65106b1 | 136 | [ LTTCOMM_ERR_INDEX(LTTCOMM_NO_EVENT) ] = "Event not found", |
b024d072 | 137 | [ LTTCOMM_ERR_INDEX(LTTCOMM_INVALID) ] = "Invalid parameter", |
5c827ce0 DG |
138 | [ LTTCOMM_ERR_INDEX(LTTCOMM_NO_USTCONSUMERD) ] = "No UST consumer detected", |
139 | [ LTTCOMM_ERR_INDEX(LTTCOMM_NO_KERNCONSUMERD) ] = "No kernel consumer detected", | |
a027b2d2 | 140 | [ LTTCOMM_ERR_INDEX(LTTCOMM_EVENT_EXIST_LOGLEVEL) ] = "Event already enabled with different loglevel", |
fac6795d DG |
141 | }; |
142 | ||
143 | /* | |
917216f6 DG |
144 | * Return ptr to string representing a human readable error code from the |
145 | * lttcomm_return_code enum. | |
fac6795d | 146 | * |
917216f6 | 147 | * These code MUST be negative in other to treat that as an error value. |
fac6795d DG |
148 | */ |
149 | const char *lttcomm_get_readable_code(enum lttcomm_return_code code) | |
150 | { | |
151 | int tmp_code = -code; | |
152 | ||
153 | if (tmp_code >= LTTCOMM_OK && tmp_code < LTTCOMM_NR) { | |
154 | return lttcomm_readable_code[LTTCOMM_ERR_INDEX(tmp_code)]; | |
155 | } | |
156 | ||
157 | return "Unknown error code"; | |
158 | } | |
6364a07a DG |
159 | |
160 | /* | |
161 | * Alloc lttcomm socket and set protocol. | |
162 | */ | |
163 | static struct lttcomm_sock *alloc_sock(enum lttcomm_sock_proto proto) | |
164 | { | |
165 | struct lttcomm_sock *sock; | |
166 | ||
167 | sock = zmalloc(sizeof(struct lttcomm_sock)); | |
168 | if (sock == NULL) { | |
169 | PERROR("zmalloc create sock"); | |
170 | goto end; | |
171 | } | |
172 | ||
173 | sock->proto = proto; | |
174 | ||
175 | end: | |
176 | return sock; | |
177 | } | |
178 | ||
179 | /* | |
180 | * Create socket from an already allocated lttcomm socket structure. | |
181 | */ | |
182 | int lttcomm_create_sock(struct lttcomm_sock *sock, | |
183 | enum lttcomm_sock_domain domain, enum lttcomm_sock_proto proto) | |
184 | { | |
185 | int ret, _sock_type, _sock_proto; | |
186 | ||
187 | assert(sock); | |
188 | ||
189 | switch (proto) { | |
190 | case LTTCOMM_SOCK_UDP: | |
191 | _sock_type = SOCK_DGRAM; | |
192 | _sock_proto = IPPROTO_UDP; | |
193 | break; | |
194 | case LTTCOMM_SOCK_TCP: | |
195 | _sock_type = SOCK_STREAM; | |
196 | _sock_proto = IPPROTO_TCP; | |
197 | break; | |
198 | default: | |
199 | ret = -1; | |
200 | goto error; | |
201 | } | |
202 | ||
203 | ret = net_families[domain].create(sock, _sock_type, _sock_proto); | |
204 | if (ret < 0) { | |
205 | goto error; | |
206 | } | |
207 | ||
208 | sock->proto = proto; | |
209 | ||
210 | error: | |
211 | return ret; | |
212 | } | |
213 | ||
214 | /* | |
215 | * Return allocated lttcomm socket structure. | |
216 | */ | |
217 | struct lttcomm_sock *lttcomm_alloc_sock(enum lttcomm_sock_domain domain, | |
218 | enum lttcomm_sock_proto proto) | |
219 | { | |
220 | int ret; | |
221 | struct lttcomm_sock *sock; | |
222 | ||
223 | sock = alloc_sock(proto); | |
224 | if (sock == NULL) { | |
225 | goto alloc_error; | |
226 | } | |
227 | ||
228 | ret = lttcomm_create_sock(sock, domain, proto); | |
229 | if (ret < 0) { | |
230 | goto error; | |
231 | } | |
232 | ||
233 | return sock; | |
234 | ||
235 | error: | |
236 | free(sock); | |
237 | alloc_error: | |
238 | return NULL; | |
239 | } | |
240 | ||
241 | /* | |
242 | * Init IPv4 sockaddr structure. | |
243 | */ | |
244 | int lttcomm_init_inet_sockaddr(struct lttcomm_sockaddr *sockaddr, | |
245 | const char *ip, unsigned int port) | |
246 | { | |
247 | int ret; | |
248 | ||
249 | assert(sockaddr); | |
250 | assert(ip); | |
251 | assert(port > 0 && port <= 65535); | |
252 | ||
253 | memset(sockaddr, 0, sizeof(struct lttcomm_sockaddr)); | |
254 | ||
255 | sockaddr->type = LTTCOMM_INET; | |
256 | sockaddr->addr.sin.sin_family = AF_INET; | |
257 | sockaddr->addr.sin.sin_port = htons(port); | |
258 | ret = inet_pton(sockaddr->addr.sin.sin_family, ip, | |
259 | &sockaddr->addr.sin.sin_addr); | |
260 | if (ret < 1) { | |
261 | ret = -1; | |
262 | goto error; | |
263 | } | |
264 | memset(sockaddr->addr.sin.sin_zero, 0, sizeof(sockaddr->addr.sin.sin_zero)); | |
265 | ||
266 | error: | |
267 | return ret; | |
268 | } | |
269 | ||
270 | /* | |
271 | * Init IPv6 sockaddr structure. | |
272 | */ | |
273 | int lttcomm_init_inet6_sockaddr(struct lttcomm_sockaddr *sockaddr, | |
274 | const char *ip, unsigned int port) | |
275 | { | |
276 | int ret; | |
277 | ||
278 | assert(sockaddr); | |
279 | assert(ip); | |
280 | assert(port > 0 && port <= 65535); | |
281 | ||
282 | memset(sockaddr, 0, sizeof(struct lttcomm_sockaddr)); | |
283 | ||
284 | sockaddr->type = LTTCOMM_INET6; | |
285 | sockaddr->addr.sin6.sin6_family = AF_INET6; | |
286 | sockaddr->addr.sin6.sin6_port = htons(port); | |
287 | ret = inet_pton(sockaddr->addr.sin6.sin6_family, ip, | |
288 | &sockaddr->addr.sin6.sin6_addr); | |
289 | if (ret < 1) { | |
290 | ret = -1; | |
291 | goto error; | |
292 | } | |
293 | ||
294 | error: | |
295 | return ret; | |
296 | } |