Commit | Line | Data |
---|---|---|
d36b8583 | 1 | /* |
21cf9b6b | 2 | * Copyright (C) 2011 EfficiOS Inc. |
d36b8583 | 3 | * |
ab5be9fa | 4 | * SPDX-License-Identifier: GPL-2.0-only |
d36b8583 | 5 | * |
d36b8583 DG |
6 | */ |
7 | ||
6c1c0768 | 8 | #define _LGPL_SOURCE |
28ab034a JG |
9 | #include "../command.hpp" |
10 | #include "../utils.hpp" | |
11 | ||
12 | #include <common/mi-lttng.hpp> | |
13 | #include <common/sessiond-comm/sessiond-comm.hpp> | |
49cddecd | 14 | #include <common/lttng-kernel.hpp> |
28ab034a JG |
15 | #include <common/utils.hpp> |
16 | ||
17 | #include <lttng/domain-internal.hpp> | |
18 | ||
19 | #include <ctype.h> | |
20 | #include <inttypes.h> | |
d36b8583 DG |
21 | #include <popt.h> |
22 | #include <stdio.h> | |
23 | #include <stdlib.h> | |
24 | #include <string.h> | |
25 | #include <sys/stat.h> | |
26 | #include <sys/types.h> | |
27 | #include <unistd.h> | |
42224349 | 28 | |
cf0bcb51 | 29 | static struct lttng_channel chan_opts; |
5edd7e09 | 30 | static int opt_kernel; |
5440dc42 | 31 | static char *opt_session_name; |
d36b8583 | 32 | static int opt_userspace; |
a79d84dd | 33 | static char *opt_output; |
7972aab2 DG |
34 | static int opt_buffer_uid; |
35 | static int opt_buffer_pid; | |
36 | static int opt_buffer_global; | |
cf0bcb51 JG |
37 | static struct { |
38 | bool set; | |
8193ef17 | 39 | uint64_t interval; |
cf0bcb51 | 40 | } opt_monitor_timer; |
491d1539 MD |
41 | static struct { |
42 | bool set; | |
43 | int64_t value; | |
44 | } opt_blocking_timeout; | |
d36b8583 | 45 | |
acc09215 JRJ |
46 | static struct mi_writer *writer; |
47 | ||
4fc83d94 PP |
48 | #ifdef LTTNG_EMBED_HELP |
49 | static const char help_msg[] = | |
50 | #include <lttng-enable-channel.1.h> | |
28ab034a | 51 | ; |
4fc83d94 PP |
52 | #endif |
53 | ||
d36b8583 DG |
54 | enum { |
55 | OPT_HELP = 1, | |
7d29a247 DG |
56 | OPT_DISCARD, |
57 | OPT_OVERWRITE, | |
58 | OPT_SUBBUF_SIZE, | |
59 | OPT_NUM_SUBBUF, | |
60 | OPT_SWITCH_TIMER, | |
cf0bcb51 | 61 | OPT_MONITOR_TIMER, |
7d29a247 | 62 | OPT_READ_TIMER, |
d36b8583 | 63 | OPT_USERSPACE, |
679b4943 | 64 | OPT_LIST_OPTIONS, |
1624d5b7 JD |
65 | OPT_TRACEFILE_SIZE, |
66 | OPT_TRACEFILE_COUNT, | |
491d1539 | 67 | OPT_BLOCKING_TIMEOUT, |
d36b8583 DG |
68 | }; |
69 | ||
cd80958d DG |
70 | static struct lttng_handle *handle; |
71 | ||
a79d84dd DG |
72 | const char *output_mmap = "mmap"; |
73 | const char *output_splice = "splice"; | |
74 | ||
d36b8583 DG |
75 | static struct poptOption long_options[] = { |
76 | /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */ | |
cd9adb8b JG |
77 | { "help", 'h', POPT_ARG_NONE, nullptr, OPT_HELP, nullptr, nullptr }, |
78 | { "session", 's', POPT_ARG_STRING, &opt_session_name, 0, nullptr, nullptr }, | |
79 | { "kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, nullptr, nullptr }, | |
80 | { "userspace", 'u', POPT_ARG_NONE, nullptr, OPT_USERSPACE, nullptr, nullptr }, | |
81 | { "discard", 0, POPT_ARG_NONE, nullptr, OPT_DISCARD, nullptr, nullptr }, | |
82 | { "overwrite", 0, POPT_ARG_NONE, nullptr, OPT_OVERWRITE, nullptr, nullptr }, | |
83 | { "subbuf-size", 0, POPT_ARG_STRING, nullptr, OPT_SUBBUF_SIZE, nullptr, nullptr }, | |
84 | { "num-subbuf", 0, POPT_ARG_INT, nullptr, OPT_NUM_SUBBUF, nullptr, nullptr }, | |
85 | { "switch-timer", 0, POPT_ARG_INT, nullptr, OPT_SWITCH_TIMER, nullptr, nullptr }, | |
86 | { "monitor-timer", 0, POPT_ARG_INT, nullptr, OPT_MONITOR_TIMER, nullptr, nullptr }, | |
87 | { "read-timer", 0, POPT_ARG_INT, nullptr, OPT_READ_TIMER, nullptr, nullptr }, | |
88 | { "list-options", 0, POPT_ARG_NONE, nullptr, OPT_LIST_OPTIONS, nullptr, nullptr }, | |
89 | { "output", 0, POPT_ARG_STRING, &opt_output, 0, nullptr, nullptr }, | |
90 | { "buffers-uid", 0, POPT_ARG_VAL, &opt_buffer_uid, 1, nullptr, nullptr }, | |
91 | { "buffers-pid", 0, POPT_ARG_VAL, &opt_buffer_pid, 1, nullptr, nullptr }, | |
92 | { "buffers-global", 0, POPT_ARG_VAL, &opt_buffer_global, 1, nullptr, nullptr }, | |
93 | { "tracefile-size", 'C', POPT_ARG_INT, nullptr, OPT_TRACEFILE_SIZE, nullptr, nullptr }, | |
94 | { "tracefile-count", 'W', POPT_ARG_INT, nullptr, OPT_TRACEFILE_COUNT, nullptr, nullptr }, | |
95 | { "blocking-timeout", 0, POPT_ARG_INT, nullptr, OPT_BLOCKING_TIMEOUT, nullptr, nullptr }, | |
96 | { nullptr, 0, 0, nullptr, 0, nullptr, nullptr } | |
d36b8583 DG |
97 | }; |
98 | ||
5edd7e09 DG |
99 | /* |
100 | * Set default attributes depending on those already defined from the command | |
101 | * line. | |
102 | */ | |
103 | static void set_default_attr(struct lttng_domain *dom) | |
104 | { | |
105 | struct lttng_channel_attr default_attr; | |
106 | ||
c1e4642c JG |
107 | memset(&default_attr, 0, sizeof(default_attr)); |
108 | ||
5edd7e09 DG |
109 | /* Set attributes */ |
110 | lttng_channel_set_default_attr(dom, &default_attr); | |
111 | ||
cf0bcb51 JG |
112 | if (chan_opts.attr.overwrite == -1) { |
113 | chan_opts.attr.overwrite = default_attr.overwrite; | |
5edd7e09 | 114 | } |
cf0bcb51 JG |
115 | if (chan_opts.attr.subbuf_size == -1) { |
116 | chan_opts.attr.subbuf_size = default_attr.subbuf_size; | |
5edd7e09 | 117 | } |
cf0bcb51 JG |
118 | if (chan_opts.attr.num_subbuf == -1) { |
119 | chan_opts.attr.num_subbuf = default_attr.num_subbuf; | |
5edd7e09 | 120 | } |
cf0bcb51 JG |
121 | if (chan_opts.attr.switch_timer_interval == -1) { |
122 | chan_opts.attr.switch_timer_interval = default_attr.switch_timer_interval; | |
5edd7e09 | 123 | } |
cf0bcb51 JG |
124 | if (chan_opts.attr.read_timer_interval == -1) { |
125 | chan_opts.attr.read_timer_interval = default_attr.read_timer_interval; | |
5edd7e09 | 126 | } |
cf0bcb51 JG |
127 | if ((int) chan_opts.attr.output == -1) { |
128 | chan_opts.attr.output = default_attr.output; | |
5edd7e09 | 129 | } |
cf0bcb51 JG |
130 | if (chan_opts.attr.tracefile_count == -1) { |
131 | chan_opts.attr.tracefile_count = default_attr.tracefile_count; | |
1624d5b7 | 132 | } |
cf0bcb51 JG |
133 | if (chan_opts.attr.tracefile_size == -1) { |
134 | chan_opts.attr.tracefile_size = default_attr.tracefile_size; | |
1624d5b7 | 135 | } |
5edd7e09 DG |
136 | } |
137 | ||
d36b8583 | 138 | /* |
0fdd1e2c | 139 | * Adding channel using the lttng API. |
d36b8583 | 140 | */ |
5b915816 | 141 | static int enable_channel(char *session_name, char *channel_list) |
d36b8583 | 142 | { |
cd9adb8b | 143 | struct lttng_channel *channel = nullptr; |
acc09215 | 144 | int ret = CMD_SUCCESS, warn = 0, error = 0, success = 0; |
49cddecd | 145 | enum lttng_kernel_tracer_status kernel_tracer_status; |
d36b8583 | 146 | char *channel_name; |
7d29a247 | 147 | struct lttng_domain dom; |
d36b8583 | 148 | |
441c16a7 MD |
149 | memset(&dom, 0, sizeof(dom)); |
150 | ||
491d1539 MD |
151 | /* Validate options. */ |
152 | if (opt_kernel) { | |
153 | if (opt_blocking_timeout.set) { | |
154 | ERR("Retry timeout option not supported for kernel domain (-k)"); | |
155 | ret = CMD_ERROR; | |
156 | goto error; | |
157 | } | |
158 | } | |
159 | ||
d78d6610 | 160 | /* Create lttng domain */ |
7d29a247 DG |
161 | if (opt_kernel) { |
162 | dom.type = LTTNG_DOMAIN_KERNEL; | |
7972aab2 | 163 | dom.buf_type = LTTNG_BUFFER_GLOBAL; |
88c5f0d8 DG |
164 | if (opt_buffer_uid || opt_buffer_pid) { |
165 | ERR("Buffer type not supported for domain -k"); | |
166 | ret = CMD_ERROR; | |
167 | goto error; | |
168 | } | |
d78d6610 | 169 | } else if (opt_userspace) { |
f6a9efaa | 170 | dom.type = LTTNG_DOMAIN_UST; |
8692d4e5 DG |
171 | if (opt_buffer_pid) { |
172 | dom.buf_type = LTTNG_BUFFER_PER_PID; | |
7972aab2 | 173 | } else { |
88c5f0d8 DG |
174 | if (opt_buffer_global) { |
175 | ERR("Buffer type not supported for domain -u"); | |
176 | ret = CMD_ERROR; | |
177 | goto error; | |
178 | } | |
8692d4e5 | 179 | dom.buf_type = LTTNG_BUFFER_PER_UID; |
7972aab2 | 180 | } |
0fdd1e2c | 181 | } else { |
3ecec76a | 182 | /* Checked by the caller. */ |
a0377dfe | 183 | abort(); |
7d29a247 DG |
184 | } |
185 | ||
5edd7e09 DG |
186 | set_default_attr(&dom); |
187 | ||
cf0bcb51 | 188 | if (chan_opts.attr.tracefile_size == 0 && chan_opts.attr.tracefile_count) { |
d16dee89 | 189 | ERR("Missing option --tracefile-size. " |
28ab034a | 190 | "A file count without a size won't do anything."); |
d16dee89 DG |
191 | ret = CMD_ERROR; |
192 | goto error; | |
193 | } | |
194 | ||
cf0bcb51 | 195 | if ((chan_opts.attr.tracefile_size > 0) && |
28ab034a | 196 | (chan_opts.attr.tracefile_size < chan_opts.attr.subbuf_size)) { |
de65565a | 197 | WARN("Tracefile size rounded up from (%" PRIu64 ") to subbuffer size (%" PRIu64 ")", |
28ab034a JG |
198 | chan_opts.attr.tracefile_size, |
199 | chan_opts.attr.subbuf_size); | |
cf0bcb51 | 200 | chan_opts.attr.tracefile_size = chan_opts.attr.subbuf_size; |
1624d5b7 JD |
201 | } |
202 | ||
a79d84dd DG |
203 | /* Setting channel output */ |
204 | if (opt_output) { | |
205 | if (!strncmp(output_mmap, opt_output, strlen(output_mmap))) { | |
cf0bcb51 | 206 | chan_opts.attr.output = LTTNG_EVENT_MMAP; |
a79d84dd | 207 | } else if (!strncmp(output_splice, opt_output, strlen(output_splice))) { |
cf0bcb51 | 208 | chan_opts.attr.output = LTTNG_EVENT_SPLICE; |
a79d84dd DG |
209 | } else { |
210 | ERR("Unknown output type %s. Possible values are: %s, %s\n", | |
28ab034a JG |
211 | opt_output, |
212 | output_mmap, | |
213 | output_splice); | |
a79d84dd DG |
214 | ret = CMD_ERROR; |
215 | goto error; | |
216 | } | |
217 | } | |
218 | ||
cd80958d | 219 | handle = lttng_create_handle(session_name, &dom); |
cd9adb8b | 220 | if (handle == nullptr) { |
cd80958d DG |
221 | ret = -1; |
222 | goto error; | |
223 | } | |
224 | ||
acc09215 JRJ |
225 | /* Mi open channels element */ |
226 | if (lttng_opt_mi) { | |
a0377dfe | 227 | LTTNG_ASSERT(writer); |
acc09215 JRJ |
228 | ret = mi_lttng_channels_open(writer); |
229 | if (ret) { | |
230 | ret = CMD_ERROR; | |
231 | goto error; | |
232 | } | |
233 | } | |
234 | ||
0fdd1e2c | 235 | /* Strip channel list (format: chan1,chan2,...) */ |
5b915816 | 236 | channel_name = strtok(channel_list, ","); |
cd9adb8b | 237 | while (channel_name != nullptr) { |
cf0bcb51 JG |
238 | void *extended_ptr; |
239 | ||
1f345e94 | 240 | /* Validate channel name's length */ |
d6a6a609 | 241 | if (strlen(channel_name) >= sizeof(chan_opts.name)) { |
1f345e94 | 242 | ERR("Channel name is too long (max. %zu characters)", |
28ab034a | 243 | sizeof(chan_opts.name) - 1); |
1f345e94 PP |
244 | error = 1; |
245 | goto skip_enable; | |
246 | } | |
247 | ||
cf0bcb51 JG |
248 | /* |
249 | * A dynamically-allocated channel is used in order to allow | |
250 | * the configuration of extended attributes (post-2.9). | |
251 | */ | |
252 | channel = lttng_channel_create(&dom); | |
253 | if (!channel) { | |
254 | ERR("Unable to create channel object"); | |
255 | error = 1; | |
256 | goto error; | |
257 | } | |
258 | ||
1f345e94 | 259 | /* Copy channel name */ |
cf0bcb51 JG |
260 | strcpy(channel->name, channel_name); |
261 | channel->enabled = 1; | |
262 | extended_ptr = channel->attr.extended.ptr; | |
263 | memcpy(&channel->attr, &chan_opts.attr, sizeof(chan_opts.attr)); | |
264 | channel->attr.extended.ptr = extended_ptr; | |
265 | if (opt_monitor_timer.set) { | |
266 | ret = lttng_channel_set_monitor_timer_interval(channel, | |
28ab034a | 267 | opt_monitor_timer.interval); |
cf0bcb51 JG |
268 | if (ret) { |
269 | ERR("Failed to set the channel's monitor timer interval"); | |
270 | error = 1; | |
271 | goto error; | |
272 | } | |
273 | } | |
491d1539 MD |
274 | if (opt_blocking_timeout.set) { |
275 | ret = lttng_channel_set_blocking_timeout(channel, | |
28ab034a | 276 | opt_blocking_timeout.value); |
491d1539 MD |
277 | if (ret) { |
278 | ERR("Failed to set the channel's blocking timeout"); | |
279 | error = 1; | |
280 | goto error; | |
281 | } | |
282 | } | |
0fdd1e2c DG |
283 | |
284 | DBG("Enabling channel %s", channel_name); | |
285 | ||
cf0bcb51 | 286 | ret = lttng_enable_channel(handle, channel); |
0fdd1e2c | 287 | if (ret < 0) { |
acc09215 | 288 | success = 0; |
42224349 | 289 | switch (-ret) { |
f73fabfd DG |
290 | case LTTNG_ERR_KERN_CHAN_EXIST: |
291 | case LTTNG_ERR_UST_CHAN_EXIST: | |
b9dfb167 | 292 | case LTTNG_ERR_CHAN_EXIST: |
28ab034a JG |
293 | WARN("Channel %s: %s (session %s)", |
294 | channel_name, | |
295 | lttng_strerror(ret), | |
296 | session_name); | |
acc09215 JRJ |
297 | warn = 1; |
298 | break; | |
1f345e94 PP |
299 | case LTTNG_ERR_INVALID_CHANNEL_NAME: |
300 | ERR("Invalid channel name: \"%s\". " | |
301 | "Channel names may not start with '.', and " | |
28ab034a JG |
302 | "may not contain '/'.", |
303 | channel_name); | |
1f345e94 PP |
304 | error = 1; |
305 | break; | |
42224349 | 306 | default: |
28ab034a JG |
307 | ERR("Channel %s: %s (session %s)", |
308 | channel_name, | |
309 | lttng_strerror(ret), | |
310 | session_name); | |
acc09215 | 311 | error = 1; |
42224349 DG |
312 | break; |
313 | } | |
49cddecd KS |
314 | /* |
315 | * Ask the sessiond for the more details on the status of the kernel tracer. | |
316 | */ | |
317 | ret = lttng_get_kernel_tracer_status(&kernel_tracer_status); | |
318 | if (ret < 0) { | |
319 | ERR("Failed to get kernel tracer status: %s", lttng_strerror(ret)); | |
320 | } else { | |
321 | switch (kernel_tracer_status) { | |
322 | case LTTNG_KERNEL_TRACER_STATUS_INITIALIZED: | |
323 | break; | |
324 | case LTTNG_KERNEL_TRACER_STATUS_ERR_MODULES_UNKNOWN: | |
325 | MSG("\tKernel module loading failed"); | |
326 | break; | |
327 | case LTTNG_KERNEL_TRACER_STATUS_ERR_MODULES_MISSING: | |
328 | MSG("\tMissing one or more required kernel modules"); | |
329 | break; | |
330 | case LTTNG_KERNEL_TRACER_STATUS_ERR_MODULES_SIGNATURE: | |
331 | MSG("\tKernel module signature error prevented loading of one or more required kernel modules"); | |
332 | break; | |
333 | case LTTNG_KERNEL_TRACER_STATUS_ERR_NEED_ROOT: | |
334 | MSG("\tlttng-sessiond isn't running as root"); | |
335 | break; | |
336 | case LTTNG_KERNEL_TRACER_STATUS_ERR_NOTIFIER: | |
337 | MSG("\tFailed to setup notifiers"); | |
338 | break; | |
339 | case LTTNG_KERNEL_TRACER_STATUS_ERR_OPEN_PROC_LTTNG: | |
340 | MSG("\tlttng-sessiond failed to open proc lttng"); | |
341 | break; | |
342 | case LTTNG_KERNEL_TRACER_STATUS_ERR_VERSION_MISMATCH: | |
343 | MSG("\tVersion mismatch between kernel tracer and kernel tracer ABI"); | |
344 | break; | |
345 | default: | |
346 | MSG("\tUnknown kernel tracer status (%d)", kernel_tracer_status); | |
347 | break; | |
348 | } | |
349 | MSG("\tConsult lttng-sessiond logs for more information"); | |
350 | } | |
d36b8583 | 351 | } else { |
7885e399 | 352 | MSG("%s channel %s enabled for session %s", |
28ab034a JG |
353 | lttng_domain_type_str(dom.type), |
354 | channel_name, | |
355 | session_name); | |
acc09215 JRJ |
356 | success = 1; |
357 | } | |
358 | ||
28ab034a | 359 | skip_enable: |
acc09215 JRJ |
360 | if (lttng_opt_mi) { |
361 | /* Mi print the channel element and leave it open */ | |
cf0bcb51 | 362 | ret = mi_lttng_channel(writer, channel, 1); |
acc09215 JRJ |
363 | if (ret) { |
364 | ret = CMD_ERROR; | |
365 | goto error; | |
366 | } | |
367 | ||
368 | /* Individual Success ? */ | |
28ab034a JG |
369 | ret = mi_lttng_writer_write_element_bool( |
370 | writer, mi_lttng_element_command_success, success); | |
acc09215 JRJ |
371 | if (ret) { |
372 | ret = CMD_ERROR; | |
373 | goto error; | |
374 | } | |
375 | ||
376 | /* Close channel element */ | |
377 | ret = mi_lttng_writer_close_element(writer); | |
378 | if (ret) { | |
379 | ret = CMD_ERROR; | |
380 | goto error; | |
381 | } | |
d36b8583 DG |
382 | } |
383 | ||
acc09215 | 384 | /* Next channel */ |
cd9adb8b | 385 | channel_name = strtok(nullptr, ","); |
cf0bcb51 | 386 | lttng_channel_destroy(channel); |
cd9adb8b | 387 | channel = nullptr; |
d36b8583 DG |
388 | } |
389 | ||
acc09215 JRJ |
390 | if (lttng_opt_mi) { |
391 | /* Close channels element */ | |
392 | ret = mi_lttng_writer_close_element(writer); | |
393 | if (ret) { | |
394 | ret = CMD_ERROR; | |
395 | goto error; | |
396 | } | |
397 | } | |
398 | ||
ae856491 DG |
399 | ret = CMD_SUCCESS; |
400 | ||
d36b8583 | 401 | error: |
cf0bcb51 JG |
402 | if (channel) { |
403 | lttng_channel_destroy(channel); | |
404 | } | |
acc09215 JRJ |
405 | /* If more important error happen bypass the warning */ |
406 | if (!ret && warn) { | |
ae856491 DG |
407 | ret = CMD_WARNING; |
408 | } | |
acc09215 JRJ |
409 | /* If more important error happen bypass the warning */ |
410 | if (!ret && error) { | |
411 | ret = CMD_ERROR; | |
412 | } | |
ae856491 | 413 | |
cd80958d DG |
414 | lttng_destroy_handle(handle); |
415 | ||
d36b8583 DG |
416 | return ret; |
417 | } | |
418 | ||
419 | /* | |
0fdd1e2c | 420 | * Default value for channel configuration. |
7d29a247 | 421 | */ |
cd9adb8b | 422 | static void init_channel_config() |
7d29a247 | 423 | { |
5edd7e09 DG |
424 | /* |
425 | * Put -1 everywhere so we can identify those set by the command line and | |
426 | * those needed to be set by the default values. | |
427 | */ | |
cf0bcb51 | 428 | memset(&chan_opts.attr, -1, sizeof(chan_opts.attr)); |
cd9adb8b | 429 | chan_opts.attr.extended.ptr = nullptr; |
7d29a247 DG |
430 | } |
431 | ||
432 | /* | |
0fdd1e2c | 433 | * Add channel to trace session |
d36b8583 DG |
434 | */ |
435 | int cmd_enable_channels(int argc, const char **argv) | |
436 | { | |
acc09215 | 437 | int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1; |
d36b8583 | 438 | static poptContext pc; |
cd9adb8b JG |
439 | char *session_name = nullptr; |
440 | char *channel_list = nullptr; | |
441 | char *opt_arg = nullptr; | |
442 | const char *arg_channel_list = nullptr; | |
443 | const char *leftover = nullptr; | |
d36b8583 | 444 | |
7d29a247 DG |
445 | init_channel_config(); |
446 | ||
cd9adb8b | 447 | pc = poptGetContext(nullptr, argc, argv, long_options, 0); |
d36b8583 DG |
448 | poptReadDefaultConfig(pc, 0); |
449 | ||
450 | while ((opt = poptGetNextOpt(pc)) != -1) { | |
451 | switch (opt) { | |
452 | case OPT_HELP: | |
4ba92f18 | 453 | SHOW_HELP(); |
d36b8583 | 454 | goto end; |
7d29a247 | 455 | case OPT_DISCARD: |
cf0bcb51 | 456 | chan_opts.attr.overwrite = 0; |
7d29a247 DG |
457 | DBG("Channel set to discard"); |
458 | break; | |
459 | case OPT_OVERWRITE: | |
cf0bcb51 | 460 | chan_opts.attr.overwrite = 1; |
7d29a247 DG |
461 | DBG("Channel set to overwrite"); |
462 | break; | |
463 | case OPT_SUBBUF_SIZE: | |
1cb514ce MD |
464 | { |
465 | uint64_t rounded_size; | |
466 | int order; | |
467 | ||
70d0b120 SM |
468 | /* Parse the size */ |
469 | opt_arg = poptGetOptArg(pc); | |
28ab034a JG |
470 | if (utils_parse_size_suffix(opt_arg, &chan_opts.attr.subbuf_size) < 0 || |
471 | !chan_opts.attr.subbuf_size) { | |
1cb514ce | 472 | ERR("Wrong value in --subbuf-size parameter: %s", opt_arg); |
70d0b120 SM |
473 | ret = CMD_ERROR; |
474 | goto end; | |
475 | } | |
476 | ||
cf0bcb51 | 477 | order = get_count_order_u64(chan_opts.attr.subbuf_size); |
a0377dfe | 478 | LTTNG_ASSERT(order >= 0); |
1cb514ce | 479 | rounded_size = 1ULL << order; |
cf0bcb51 | 480 | if (rounded_size < chan_opts.attr.subbuf_size) { |
06c0da96 | 481 | ERR("The subbuf size (%" PRIu64 ") is rounded and overflows!", |
28ab034a | 482 | chan_opts.attr.subbuf_size); |
06c0da96 DG |
483 | ret = CMD_ERROR; |
484 | goto end; | |
485 | } | |
486 | ||
cf0bcb51 | 487 | if (rounded_size != chan_opts.attr.subbuf_size) { |
28ab034a JG |
488 | WARN("The subbuf size (%" PRIu64 |
489 | ") is rounded to the next power of 2 (%" PRIu64 ")", | |
490 | chan_opts.attr.subbuf_size, | |
491 | rounded_size); | |
cf0bcb51 | 492 | chan_opts.attr.subbuf_size = rounded_size; |
70d0b120 SM |
493 | } |
494 | ||
1cb514ce | 495 | /* Should now be power of 2 */ |
28ab034a JG |
496 | LTTNG_ASSERT( |
497 | !((chan_opts.attr.subbuf_size - 1) & chan_opts.attr.subbuf_size)); | |
1cb514ce | 498 | |
cf0bcb51 | 499 | DBG("Channel subbuf size set to %" PRIu64, chan_opts.attr.subbuf_size); |
7d29a247 | 500 | break; |
1cb514ce | 501 | } |
7d29a247 | 502 | case OPT_NUM_SUBBUF: |
1cb514ce MD |
503 | { |
504 | uint64_t rounded_size; | |
505 | int order; | |
506 | ||
16068db5 | 507 | errno = 0; |
1cb514ce | 508 | opt_arg = poptGetOptArg(pc); |
cd9adb8b | 509 | chan_opts.attr.num_subbuf = strtoull(opt_arg, nullptr, 0); |
cf0bcb51 | 510 | if (errno != 0 || !chan_opts.attr.num_subbuf || !isdigit(opt_arg[0])) { |
1cb514ce | 511 | ERR("Wrong value in --num-subbuf parameter: %s", opt_arg); |
16068db5 MD |
512 | ret = CMD_ERROR; |
513 | goto end; | |
514 | } | |
515 | ||
cf0bcb51 | 516 | order = get_count_order_u64(chan_opts.attr.num_subbuf); |
a0377dfe | 517 | LTTNG_ASSERT(order >= 0); |
1cb514ce | 518 | rounded_size = 1ULL << order; |
cf0bcb51 | 519 | if (rounded_size < chan_opts.attr.num_subbuf) { |
28ab034a JG |
520 | ERR("The number of subbuffers (%" PRIu64 |
521 | ") is rounded and overflows!", | |
522 | chan_opts.attr.num_subbuf); | |
06c0da96 DG |
523 | ret = CMD_ERROR; |
524 | goto end; | |
525 | } | |
526 | ||
cf0bcb51 | 527 | if (rounded_size != chan_opts.attr.num_subbuf) { |
28ab034a JG |
528 | WARN("The number of subbuffers (%" PRIu64 |
529 | ") is rounded to the next power of 2 (%" PRIu64 ")", | |
530 | chan_opts.attr.num_subbuf, | |
531 | rounded_size); | |
cf0bcb51 | 532 | chan_opts.attr.num_subbuf = rounded_size; |
1cb514ce MD |
533 | } |
534 | ||
535 | /* Should now be power of 2 */ | |
28ab034a JG |
536 | LTTNG_ASSERT( |
537 | !((chan_opts.attr.num_subbuf - 1) & chan_opts.attr.num_subbuf)); | |
1cb514ce | 538 | |
cf0bcb51 | 539 | DBG("Channel subbuf num set to %" PRIu64, chan_opts.attr.num_subbuf); |
7d29a247 | 540 | break; |
1cb514ce | 541 | } |
7d29a247 | 542 | case OPT_SWITCH_TIMER: |
16068db5 | 543 | { |
c7219617 | 544 | uint64_t v; |
16068db5 MD |
545 | |
546 | errno = 0; | |
1cb514ce | 547 | opt_arg = poptGetOptArg(pc); |
c7219617 SM |
548 | |
549 | if (utils_parse_time_suffix(opt_arg, &v) < 0) { | |
550 | ERR("Wrong value for --switch-timer parameter: %s", opt_arg); | |
16068db5 MD |
551 | ret = CMD_ERROR; |
552 | goto end; | |
553 | } | |
c7219617 | 554 | |
16068db5 MD |
555 | if (v != (uint32_t) v) { |
556 | ERR("32-bit overflow in --switch-timer parameter: %s", opt_arg); | |
557 | ret = CMD_ERROR; | |
558 | goto end; | |
559 | } | |
cf0bcb51 | 560 | chan_opts.attr.switch_timer_interval = (uint32_t) v; |
2a1135fa | 561 | DBG("Channel switch timer interval set to %d %s", |
28ab034a JG |
562 | chan_opts.attr.switch_timer_interval, |
563 | USEC_UNIT); | |
7d29a247 | 564 | break; |
16068db5 | 565 | } |
7d29a247 | 566 | case OPT_READ_TIMER: |
16068db5 | 567 | { |
c7219617 | 568 | uint64_t v; |
16068db5 MD |
569 | |
570 | errno = 0; | |
1cb514ce | 571 | opt_arg = poptGetOptArg(pc); |
c7219617 SM |
572 | |
573 | if (utils_parse_time_suffix(opt_arg, &v) < 0) { | |
574 | ERR("Wrong value for --read-timer parameter: %s", opt_arg); | |
16068db5 MD |
575 | ret = CMD_ERROR; |
576 | goto end; | |
577 | } | |
c7219617 | 578 | |
16068db5 MD |
579 | if (v != (uint32_t) v) { |
580 | ERR("32-bit overflow in --read-timer parameter: %s", opt_arg); | |
581 | ret = CMD_ERROR; | |
582 | goto end; | |
583 | } | |
cf0bcb51 | 584 | chan_opts.attr.read_timer_interval = (uint32_t) v; |
2a1135fa | 585 | DBG("Channel read timer interval set to %d %s", |
28ab034a JG |
586 | chan_opts.attr.read_timer_interval, |
587 | USEC_UNIT); | |
cf0bcb51 JG |
588 | break; |
589 | } | |
590 | case OPT_MONITOR_TIMER: | |
591 | { | |
7010c033 | 592 | uint64_t v; |
cf0bcb51 JG |
593 | |
594 | errno = 0; | |
595 | opt_arg = poptGetOptArg(pc); | |
7010c033 SM |
596 | |
597 | if (utils_parse_time_suffix(opt_arg, &v) < 0) { | |
598 | ERR("Wrong value for --monitor-timer parameter: %s", opt_arg); | |
cf0bcb51 JG |
599 | ret = CMD_ERROR; |
600 | goto end; | |
601 | } | |
8193ef17 | 602 | opt_monitor_timer.interval = (uint64_t) v; |
cf0bcb51 | 603 | opt_monitor_timer.set = true; |
2a1135fa | 604 | DBG("Channel monitor timer interval set to %" PRIu64 " %s", |
28ab034a JG |
605 | opt_monitor_timer.interval, |
606 | USEC_UNIT); | |
d36b8583 | 607 | break; |
16068db5 | 608 | } |
491d1539 MD |
609 | case OPT_BLOCKING_TIMEOUT: |
610 | { | |
7010c033 | 611 | uint64_t v; |
491d1539 MD |
612 | long long v_msec; |
613 | ||
614 | errno = 0; | |
615 | opt_arg = poptGetOptArg(pc); | |
63dd9b28 PP |
616 | |
617 | if (strcmp(opt_arg, "inf") == 0) { | |
618 | opt_blocking_timeout.value = (int64_t) -1; | |
619 | opt_blocking_timeout.set = true; | |
620 | DBG("Channel blocking timeout set to infinity"); | |
621 | break; | |
622 | } | |
623 | ||
7010c033 SM |
624 | if (utils_parse_time_suffix(opt_arg, &v) < 0) { |
625 | ERR("Wrong value for --blocking-timeout parameter: %s", opt_arg); | |
491d1539 MD |
626 | ret = CMD_ERROR; |
627 | goto end; | |
628 | } | |
63dd9b28 PP |
629 | |
630 | /* | |
631 | * While LTTng-UST and LTTng-tools will accept a | |
632 | * blocking timeout expressed in µs, the current | |
633 | * tracer implementation relies on poll() which | |
634 | * takes an "int timeout" parameter expressed in | |
635 | * msec. | |
636 | * | |
637 | * Since the error reporting from the tracer is | |
638 | * not precise, we perform this check here to | |
639 | * provide a helpful error message in case of | |
640 | * overflow. | |
641 | * | |
642 | * The setter (liblttng-ctl) also performs an | |
643 | * equivalent check. | |
644 | */ | |
645 | v_msec = v / 1000; | |
646 | if (v_msec != (int32_t) v_msec) { | |
28ab034a JG |
647 | ERR("32-bit milliseconds overflow in --blocking-timeout parameter: %s", |
648 | opt_arg); | |
63dd9b28 PP |
649 | ret = CMD_ERROR; |
650 | goto end; | |
491d1539 | 651 | } |
63dd9b28 | 652 | |
491d1539 MD |
653 | opt_blocking_timeout.value = (int64_t) v; |
654 | opt_blocking_timeout.set = true; | |
2a1135fa | 655 | DBG("Channel blocking timeout set to %" PRId64 " %s%s", |
28ab034a JG |
656 | opt_blocking_timeout.value, |
657 | USEC_UNIT, | |
658 | opt_blocking_timeout.value == 0 ? " (non-blocking)" : ""); | |
491d1539 MD |
659 | break; |
660 | } | |
eeac7d46 MD |
661 | case OPT_USERSPACE: |
662 | opt_userspace = 1; | |
eeac7d46 | 663 | break; |
1624d5b7 | 664 | case OPT_TRACEFILE_SIZE: |
1cb514ce | 665 | opt_arg = poptGetOptArg(pc); |
cf0bcb51 | 666 | if (utils_parse_size_suffix(opt_arg, &chan_opts.attr.tracefile_size) < 0) { |
1cb514ce | 667 | ERR("Wrong value in --tracefile-size parameter: %s", opt_arg); |
16068db5 MD |
668 | ret = CMD_ERROR; |
669 | goto end; | |
670 | } | |
1624d5b7 | 671 | DBG("Maximum tracefile size set to %" PRIu64, |
28ab034a | 672 | chan_opts.attr.tracefile_size); |
1624d5b7 JD |
673 | break; |
674 | case OPT_TRACEFILE_COUNT: | |
16068db5 MD |
675 | { |
676 | unsigned long v; | |
677 | ||
678 | errno = 0; | |
1cb514ce | 679 | opt_arg = poptGetOptArg(pc); |
cd9adb8b | 680 | v = strtoul(opt_arg, nullptr, 0); |
1cb514ce MD |
681 | if (errno != 0 || !isdigit(opt_arg[0])) { |
682 | ERR("Wrong value in --tracefile-count parameter: %s", opt_arg); | |
16068db5 MD |
683 | ret = CMD_ERROR; |
684 | goto end; | |
685 | } | |
686 | if (v != (uint32_t) v) { | |
687 | ERR("32-bit overflow in --tracefile-count parameter: %s", opt_arg); | |
688 | ret = CMD_ERROR; | |
689 | goto end; | |
690 | } | |
cf0bcb51 | 691 | chan_opts.attr.tracefile_count = (uint32_t) v; |
1624d5b7 | 692 | DBG("Maximum tracefile count set to %" PRIu64, |
28ab034a | 693 | chan_opts.attr.tracefile_count); |
1624d5b7 | 694 | break; |
16068db5 | 695 | } |
679b4943 SM |
696 | case OPT_LIST_OPTIONS: |
697 | list_cmd_options(stdout, long_options); | |
679b4943 | 698 | goto end; |
d36b8583 | 699 | default: |
d36b8583 DG |
700 | ret = CMD_UNDEFINED; |
701 | goto end; | |
702 | } | |
aafac6e1 JG |
703 | |
704 | if (opt_arg) { | |
705 | free(opt_arg); | |
706 | opt_arg = nullptr; | |
707 | } | |
d36b8583 DG |
708 | } |
709 | ||
28ab034a | 710 | ret = print_missing_or_multiple_domains(opt_kernel + opt_userspace, false); |
3ecec76a PP |
711 | if (ret) { |
712 | ret = CMD_ERROR; | |
713 | goto end; | |
714 | } | |
715 | ||
ea10baf2 | 716 | if (chan_opts.attr.overwrite == 1 && opt_blocking_timeout.set && |
28ab034a | 717 | opt_blocking_timeout.value != 0) { |
ea10baf2 | 718 | ERR("You cannot specify --overwrite and --blocking-timeout=N, " |
28ab034a | 719 | "where N is different than 0"); |
ea10baf2 PP |
720 | ret = CMD_ERROR; |
721 | goto end; | |
722 | } | |
723 | ||
acc09215 JRJ |
724 | /* Mi check */ |
725 | if (lttng_opt_mi) { | |
726 | writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi); | |
727 | if (!writer) { | |
728 | ret = -LTTNG_ERR_NOMEM; | |
729 | goto end; | |
730 | } | |
731 | ||
732 | /* Open command element */ | |
733 | ret = mi_lttng_writer_command_open(writer, | |
28ab034a | 734 | mi_lttng_element_command_enable_channels); |
acc09215 JRJ |
735 | if (ret) { |
736 | ret = CMD_ERROR; | |
737 | goto end; | |
738 | } | |
739 | ||
740 | /* Open output element */ | |
28ab034a | 741 | ret = mi_lttng_writer_open_element(writer, mi_lttng_element_command_output); |
acc09215 JRJ |
742 | if (ret) { |
743 | ret = CMD_ERROR; | |
744 | goto end; | |
745 | } | |
746 | } | |
747 | ||
5b915816 | 748 | arg_channel_list = poptGetArg(pc); |
cd9adb8b | 749 | if (arg_channel_list == nullptr) { |
5b915816 MJ |
750 | ERR("Missing channel name."); |
751 | ret = CMD_ERROR; | |
752 | success = 0; | |
753 | goto mi_closing; | |
754 | } | |
755 | ||
756 | channel_list = strdup(arg_channel_list); | |
cd9adb8b | 757 | if (channel_list == nullptr) { |
5b915816 | 758 | PERROR("Failed to copy channel name"); |
ca1c3607 | 759 | ret = CMD_ERROR; |
acc09215 JRJ |
760 | success = 0; |
761 | goto mi_closing; | |
d36b8583 DG |
762 | } |
763 | ||
68c7f6e5 JD |
764 | leftover = poptGetArg(pc); |
765 | if (leftover) { | |
766 | ERR("Unknown argument: %s", leftover); | |
767 | ret = CMD_ERROR; | |
768 | success = 0; | |
769 | goto mi_closing; | |
770 | } | |
771 | ||
cd80958d DG |
772 | if (!opt_session_name) { |
773 | session_name = get_session_name(); | |
cd9adb8b | 774 | if (session_name == nullptr) { |
acc09215 JRJ |
775 | command_ret = CMD_ERROR; |
776 | success = 0; | |
777 | goto mi_closing; | |
cd80958d DG |
778 | } |
779 | } else { | |
780 | session_name = opt_session_name; | |
781 | } | |
782 | ||
5b915816 | 783 | command_ret = enable_channel(session_name, channel_list); |
acc09215 JRJ |
784 | if (command_ret) { |
785 | success = 0; | |
786 | } | |
787 | ||
788 | mi_closing: | |
789 | /* Mi closing */ | |
790 | if (lttng_opt_mi) { | |
791 | /* Close output element */ | |
792 | ret = mi_lttng_writer_close_element(writer); | |
793 | if (ret) { | |
794 | goto end; | |
795 | } | |
796 | ||
797 | /* Success ? */ | |
28ab034a JG |
798 | ret = mi_lttng_writer_write_element_bool( |
799 | writer, mi_lttng_element_command_success, success); | |
acc09215 JRJ |
800 | if (ret) { |
801 | goto end; | |
802 | } | |
803 | ||
804 | /* Command element close */ | |
805 | ret = mi_lttng_writer_command_close(writer); | |
806 | if (ret) { | |
807 | goto end; | |
808 | } | |
809 | } | |
d36b8583 DG |
810 | |
811 | end: | |
acc09215 JRJ |
812 | /* Mi clean-up */ |
813 | if (writer && mi_lttng_writer_destroy(writer)) { | |
814 | /* Preserve original error code */ | |
815 | ret = ret ? ret : LTTNG_ERR_MI_IO_FAIL; | |
816 | } | |
817 | ||
5853fd43 DG |
818 | if (!opt_session_name && session_name) { |
819 | free(session_name); | |
820 | } | |
acc09215 | 821 | |
5b915816 MJ |
822 | free(channel_list); |
823 | ||
acc09215 JRJ |
824 | /* Overwrite ret if an error occurred when enable_channel */ |
825 | ret = command_ret ? command_ret : ret; | |
ca1c3607 | 826 | poptFreeContext(pc); |
aafac6e1 | 827 | free(opt_arg); |
d36b8583 DG |
828 | return ret; |
829 | } |