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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 | ||
32 | #include "../command.h" | |
33 | #include <lttng/rotation.h> | |
34 | ||
35 | static char *opt_session_name; | |
36 | static struct mi_writer *writer; | |
37 | ||
38 | enum { | |
39 | OPT_HELP = 1, | |
40 | OPT_LIST_OPTIONS, | |
41 | OPT_TIMER, | |
42 | }; | |
43 | ||
44 | static struct poptOption long_options[] = { | |
45 | /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */ | |
46 | {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0}, | |
47 | {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL}, | |
48 | {"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0}, | |
49 | {"timer", 0, POPT_ARG_NONE, 0, OPT_TIMER, 0, 0}, | |
50 | {0, 0, 0, 0, 0, 0, 0} | |
51 | }; | |
52 | ||
53 | static int setup_rotate(char *session_name, uint64_t timer) | |
54 | { | |
55 | int ret = 0; | |
56 | struct lttng_rotation_schedule_attr *attr = NULL; | |
57 | ||
58 | attr = lttng_rotation_schedule_attr_create(); | |
59 | if (!attr) { | |
60 | goto error; | |
61 | } | |
62 | ||
63 | if (lttng_opt_mi) { | |
64 | /* Open rotation_schedule element */ | |
65 | ret = mi_lttng_writer_open_element(writer, | |
66 | config_element_rotation_schedule); | |
67 | if (ret) { | |
68 | goto error; | |
69 | } | |
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 | ret = mi_lttng_writer_write_element_string(writer, | |
79 | mi_lttng_element_session_name, session_name); | |
80 | if (ret) { | |
81 | goto error; | |
82 | } | |
83 | } | |
84 | ||
85 | if (timer == -1ULL) { | |
86 | lttng_rotation_schedule_attr_set_timer_period(attr, timer); | |
87 | MSG("Disabling rotation timer on session %s", session_name); | |
88 | } | |
89 | ||
90 | ret = lttng_rotation_set_schedule(attr); | |
91 | if (ret) { | |
92 | ERR("%s", lttng_strerror(ret)); | |
93 | if (lttng_opt_mi) { | |
94 | ret = mi_lttng_writer_write_element_string(writer, | |
95 | mi_lttng_element_rotate_status, "error"); | |
96 | if (ret) { | |
97 | goto end; | |
98 | } | |
99 | /* Close rotation_schedule element */ | |
100 | ret = mi_lttng_writer_close_element(writer); | |
101 | if (ret) { | |
102 | goto end; | |
103 | } | |
104 | } | |
105 | goto error; | |
106 | } | |
107 | ||
108 | if (lttng_opt_mi) { | |
109 | ret = mi_lttng_writer_write_element_string(writer, | |
110 | mi_lttng_element_rotate_status, "success"); | |
111 | if (ret) { | |
112 | goto end; | |
113 | } | |
114 | ||
115 | /* Close rotation_schedule element */ | |
116 | ret = mi_lttng_writer_close_element(writer); | |
117 | if (ret) { | |
118 | goto end; | |
119 | } | |
120 | } | |
121 | ||
122 | ret = 0; | |
123 | goto end; | |
124 | ||
125 | error: | |
126 | ret = -1; | |
127 | end: | |
128 | return ret; | |
129 | } | |
130 | ||
131 | /* | |
132 | * cmd_disable_rotation | |
133 | * | |
134 | * The 'enable-rotation <options>' first level command | |
135 | */ | |
136 | int cmd_disable_rotation(int argc, const char **argv) | |
137 | { | |
138 | int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1; | |
139 | int popt_ret; | |
140 | static poptContext pc; | |
141 | char *session_name = NULL; | |
142 | bool free_session_name = false; | |
143 | uint64_t timer = 0; | |
144 | ||
145 | pc = poptGetContext(NULL, argc, argv, long_options, 0); | |
146 | popt_ret = poptReadDefaultConfig(pc, 0); | |
147 | if (popt_ret) { | |
148 | ret = CMD_ERROR; | |
149 | ERR("poptReadDefaultConfig"); | |
150 | goto end; | |
151 | } | |
152 | ||
153 | while ((opt = poptGetNextOpt(pc)) != -1) { | |
154 | switch (opt) { | |
155 | case OPT_HELP: | |
156 | SHOW_HELP(); | |
157 | goto end; | |
158 | case OPT_LIST_OPTIONS: | |
159 | list_cmd_options(stdout, long_options); | |
160 | goto end; | |
161 | case OPT_TIMER: | |
162 | timer = -1ULL; | |
163 | break; | |
164 | default: | |
165 | ret = CMD_UNDEFINED; | |
166 | goto end; | |
167 | } | |
168 | } | |
169 | ||
170 | if (opt_session_name == NULL) { | |
171 | session_name = get_session_name(); | |
172 | if (session_name == NULL) { | |
173 | goto end; | |
174 | } | |
175 | free_session_name = true; | |
176 | } else { | |
177 | session_name = opt_session_name; | |
178 | } | |
179 | ||
180 | /* Mi check */ | |
181 | if (lttng_opt_mi) { | |
182 | writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi); | |
183 | if (!writer) { | |
184 | ret = -LTTNG_ERR_NOMEM; | |
185 | goto end; | |
186 | } | |
187 | ||
188 | /* Open command element */ | |
189 | ret = mi_lttng_writer_command_open(writer, | |
190 | mi_lttng_element_command_disable_rotation); | |
191 | if (ret) { | |
192 | ret = CMD_ERROR; | |
193 | goto end; | |
194 | } | |
195 | ||
196 | /* Open output element */ | |
197 | ret = mi_lttng_writer_open_element(writer, | |
198 | mi_lttng_element_command_output); | |
199 | if (ret) { | |
200 | ret = CMD_ERROR; | |
201 | goto end; | |
202 | } | |
203 | } | |
204 | ||
205 | /* No config options, just rotate the session now */ | |
206 | if (timer == 0) { | |
207 | ERR("No timer given"); | |
208 | success = 0; | |
209 | command_ret = -1; | |
210 | } else { | |
211 | command_ret = setup_rotate(session_name, timer); | |
212 | } | |
213 | ||
214 | if (command_ret) { | |
215 | ERR("%s", lttng_strerror(command_ret)); | |
216 | success = 0; | |
217 | } | |
218 | ||
219 | /* Mi closing */ | |
220 | if (lttng_opt_mi) { | |
221 | /* Close output element */ | |
222 | ret = mi_lttng_writer_close_element(writer); | |
223 | if (ret) { | |
224 | goto end; | |
225 | } | |
226 | ||
227 | /* Success ? */ | |
228 | ret = mi_lttng_writer_write_element_bool(writer, | |
229 | mi_lttng_element_command_success, success); | |
230 | if (ret) { | |
231 | ret = CMD_ERROR; | |
232 | goto end; | |
233 | } | |
234 | ||
235 | /* Command element close */ | |
236 | ret = mi_lttng_writer_command_close(writer); | |
237 | if (ret) { | |
238 | ret = CMD_ERROR; | |
239 | goto end; | |
240 | } | |
241 | } | |
242 | ||
243 | end: | |
244 | /* Mi clean-up */ | |
245 | if (writer && mi_lttng_writer_destroy(writer)) { | |
246 | /* Preserve original error code */ | |
247 | ret = ret ? ret : -LTTNG_ERR_MI_IO_FAIL; | |
248 | } | |
249 | ||
250 | /* Overwrite ret if an error occurred with start_tracing */ | |
251 | ret = command_ret ? command_ret : ret; | |
252 | poptFreeContext(pc); | |
253 | if (free_session_name) { | |
254 | free(session_name); | |
255 | } | |
256 | return ret; | |
257 | } |