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259c2674 JD |
1 | /* |
2 | * Copyright (C) 2017 - Julien Desfossez <jdesfossez@efficios.com> | |
3 | * | |
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. | |
7 | * | |
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. | |
12 | * | |
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. | |
16 | */ | |
17 | ||
18 | #define _LGPL_SOURCE | |
19 | #include <popt.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 | #include <inttypes.h> | |
27 | #include <ctype.h> | |
28 | ||
29 | #include <common/sessiond-comm/sessiond-comm.h> | |
30 | #include <common/mi-lttng.h> | |
31 | #include <common/utils.h> | |
32 | ||
33 | #include "../command.h" | |
34 | #include <lttng/rotation.h> | |
35 | ||
36 | static char *opt_session_name; | |
37 | static struct mi_writer *writer; | |
38 | ||
3ae5c539 JD |
39 | #ifdef LTTNG_EMBED_HELP |
40 | static const char help_msg[] = | |
41 | #include <lttng-enable-rotation.1.h> | |
42 | ; | |
43 | #endif | |
44 | ||
259c2674 JD |
45 | enum { |
46 | OPT_HELP = 1, | |
47 | OPT_LIST_OPTIONS, | |
48 | OPT_TIMER, | |
90936dcf | 49 | OPT_SIZE, |
259c2674 JD |
50 | }; |
51 | ||
52 | static struct poptOption long_options[] = { | |
53 | /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */ | |
54 | {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0}, | |
55 | {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL}, | |
56 | {"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0}, | |
57 | {"timer", 0, POPT_ARG_INT, 0, OPT_TIMER, 0, 0}, | |
90936dcf | 58 | {"size", 0, POPT_ARG_INT, 0, OPT_SIZE, 0, 0}, |
259c2674 JD |
59 | {0, 0, 0, 0, 0, 0, 0} |
60 | }; | |
61 | ||
90936dcf | 62 | static int setup_rotate(char *session_name, uint64_t timer, uint64_t size) |
259c2674 JD |
63 | { |
64 | int ret = 0; | |
65 | struct lttng_rotation_schedule_attr *attr = NULL; | |
66 | ||
67 | attr = lttng_rotation_schedule_attr_create(); | |
68 | if (!attr) { | |
69 | goto error; | |
70 | } | |
71 | ||
72 | ret = lttng_rotation_schedule_attr_set_session_name(attr, session_name); | |
73 | if (ret < 0) { | |
74 | goto error; | |
75 | } | |
76 | ||
77 | if (lttng_opt_mi) { | |
78 | /* Open rotation_schedule element */ | |
79 | ret = mi_lttng_writer_open_element(writer, | |
80 | config_element_rotation_schedule); | |
81 | if (ret) { | |
82 | goto error; | |
83 | } | |
84 | ||
85 | ret = mi_lttng_writer_write_element_string(writer, | |
86 | mi_lttng_element_session_name, session_name); | |
87 | if (ret) { | |
88 | goto error; | |
89 | } | |
90 | } | |
91 | ||
92 | if (timer) { | |
93 | lttng_rotation_schedule_attr_set_timer_period(attr, timer); | |
94 | MSG("Configuring session %s to rotate every %" PRIu64 " us", | |
95 | session_name, timer); | |
96 | if (lttng_opt_mi) { | |
97 | ret = mi_lttng_writer_write_element_unsigned_int(writer, | |
98 | config_element_rotation_timer_interval, timer); | |
99 | if (ret) { | |
100 | goto end; | |
101 | } | |
102 | } | |
103 | } | |
90936dcf JD |
104 | if (size) { |
105 | lttng_rotation_schedule_attr_set_size(attr, size); | |
106 | MSG("Configuring session %s to rotate every %" PRIu64 " bytes written", | |
107 | session_name, size); | |
108 | if (lttng_opt_mi) { | |
109 | ret = mi_lttng_writer_write_element_unsigned_int(writer, | |
110 | config_element_rotation_size, size); | |
111 | if (ret) { | |
112 | goto end; | |
113 | } | |
114 | } | |
115 | } | |
259c2674 JD |
116 | |
117 | ret = lttng_rotation_set_schedule(attr); | |
118 | if (ret) { | |
119 | ERR("%s", lttng_strerror(ret)); | |
120 | if (lttng_opt_mi) { | |
121 | ret = mi_lttng_writer_write_element_string(writer, | |
122 | mi_lttng_element_rotate_status, "error"); | |
123 | if (ret) { | |
124 | goto end; | |
125 | } | |
126 | /* Close rotation_schedule element */ | |
127 | ret = mi_lttng_writer_close_element(writer); | |
128 | if (ret) { | |
129 | goto end; | |
130 | } | |
131 | } | |
132 | goto error; | |
133 | } | |
134 | ||
135 | if (lttng_opt_mi) { | |
136 | ret = mi_lttng_writer_write_element_string(writer, | |
137 | mi_lttng_element_rotate_status, "success"); | |
138 | if (ret) { | |
139 | goto end; | |
140 | } | |
141 | ||
142 | /* Close rotation_schedule element */ | |
143 | ret = mi_lttng_writer_close_element(writer); | |
144 | if (ret) { | |
145 | goto end; | |
146 | } | |
147 | } | |
148 | ||
149 | ret = 0; | |
150 | goto end; | |
151 | ||
152 | error: | |
153 | ret = -1; | |
154 | end: | |
155 | return ret; | |
156 | } | |
157 | ||
158 | /* | |
159 | * cmd_enable_rotation | |
160 | * | |
161 | * The 'enable-rotation <options>' first level command | |
162 | */ | |
163 | int cmd_enable_rotation(int argc, const char **argv) | |
164 | { | |
165 | int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1; | |
166 | int popt_ret; | |
167 | static poptContext pc; | |
168 | char *session_name = NULL; | |
169 | char *opt_arg = NULL; | |
259c2674 | 170 | bool free_session_name = false; |
90936dcf | 171 | uint64_t timer = 0, size = 0; |
259c2674 JD |
172 | |
173 | pc = poptGetContext(NULL, argc, argv, long_options, 0); | |
174 | popt_ret = poptReadDefaultConfig(pc, 0); | |
175 | if (popt_ret) { | |
176 | ret = CMD_ERROR; | |
177 | ERR("poptReadDefaultConfig"); | |
178 | goto end; | |
179 | } | |
180 | ||
181 | while ((opt = poptGetNextOpt(pc)) != -1) { | |
182 | switch (opt) { | |
183 | case OPT_HELP: | |
184 | SHOW_HELP(); | |
185 | goto end; | |
186 | case OPT_LIST_OPTIONS: | |
187 | list_cmd_options(stdout, long_options); | |
188 | goto end; | |
189 | case OPT_TIMER: | |
190 | errno = 0; | |
191 | opt_arg = poptGetOptArg(pc); | |
192 | if (errno != 0 || !isdigit(opt_arg[0])) { | |
193 | ERR("Wrong value for --timer option: %s", opt_arg); | |
194 | ret = CMD_ERROR; | |
195 | goto end; | |
196 | } | |
197 | if (utils_parse_time_suffix(opt_arg, &timer) < 0 || timer == 0) { | |
198 | ERR("Wrong value for --timer option: %s", opt_arg); | |
199 | ret = CMD_ERROR; | |
200 | goto end; | |
201 | } | |
202 | DBG("Rotation timer set to %" PRIu64, timer); | |
203 | break; | |
90936dcf JD |
204 | case OPT_SIZE: |
205 | errno = 0; | |
206 | opt_arg = poptGetOptArg(pc); | |
207 | if (utils_parse_size_suffix(opt_arg, &size) < 0 || !size) { | |
208 | ERR("Wrong value for --size option: %s", opt_arg); | |
209 | ret = CMD_ERROR; | |
210 | goto end; | |
211 | } | |
212 | DBG("Rotation size set to %" PRIu64, size); | |
213 | break; | |
259c2674 JD |
214 | default: |
215 | ret = CMD_UNDEFINED; | |
216 | goto end; | |
217 | } | |
218 | } | |
219 | ||
220 | if (opt_session_name == NULL) { | |
221 | session_name = get_session_name(); | |
222 | if (session_name == NULL) { | |
223 | goto end; | |
224 | } | |
225 | free_session_name = true; | |
226 | } else { | |
227 | session_name = opt_session_name; | |
228 | } | |
229 | ||
230 | /* Mi check */ | |
231 | if (lttng_opt_mi) { | |
232 | writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi); | |
233 | if (!writer) { | |
234 | ret = -LTTNG_ERR_NOMEM; | |
235 | goto end; | |
236 | } | |
237 | ||
238 | /* Open command element */ | |
239 | ret = mi_lttng_writer_command_open(writer, | |
240 | mi_lttng_element_command_enable_rotation); | |
241 | if (ret) { | |
242 | ret = CMD_ERROR; | |
243 | goto end; | |
244 | } | |
245 | ||
246 | /* Open output element */ | |
247 | ret = mi_lttng_writer_open_element(writer, | |
248 | mi_lttng_element_command_output); | |
249 | if (ret) { | |
250 | ret = CMD_ERROR; | |
251 | goto end; | |
252 | } | |
253 | } | |
254 | ||
255 | /* No config options, just rotate the session now */ | |
90936dcf JD |
256 | if (timer == 0 && size == 0) { |
257 | ERR("No timer or size given"); | |
259c2674 JD |
258 | success = 0; |
259 | command_ret = -1; | |
260 | } else { | |
90936dcf | 261 | command_ret = setup_rotate(session_name, timer, size); |
259c2674 JD |
262 | } |
263 | ||
264 | if (command_ret) { | |
265 | ERR("%s", lttng_strerror(command_ret)); | |
266 | success = 0; | |
267 | } | |
268 | ||
269 | /* Mi closing */ | |
270 | if (lttng_opt_mi) { | |
271 | /* Close output element */ | |
272 | ret = mi_lttng_writer_close_element(writer); | |
273 | if (ret) { | |
274 | goto end; | |
275 | } | |
276 | /* Success ? */ | |
277 | ret = mi_lttng_writer_write_element_bool(writer, | |
278 | mi_lttng_element_command_success, success); | |
279 | if (ret) { | |
280 | ret = CMD_ERROR; | |
281 | goto end; | |
282 | } | |
283 | ||
284 | /* Command element close */ | |
285 | ret = mi_lttng_writer_command_close(writer); | |
286 | if (ret) { | |
287 | ret = CMD_ERROR; | |
288 | goto end; | |
289 | } | |
290 | } | |
291 | ||
292 | end: | |
293 | /* Mi clean-up */ | |
294 | if (writer && mi_lttng_writer_destroy(writer)) { | |
295 | /* Preserve original error code */ | |
296 | ret = ret ? ret : -LTTNG_ERR_MI_IO_FAIL; | |
297 | } | |
298 | ||
299 | /* Overwrite ret if an error occurred with start_tracing */ | |
300 | ret = command_ret ? command_ret : ret; | |
301 | poptFreeContext(pc); | |
302 | if (free_session_name) { | |
303 | free(session_name); | |
304 | } | |
305 | return ret; | |
306 | } |