2 * collectd - src/mcelog.c
5 * Copyright(c) 2016 Intel Corporation. All rights reserved.
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
22 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
23 * DEALINGS IN THE SOFTWARE.
26 * Maryam Tahhan <maryam.tahhan@intel.com>
27 * Volodymyr Mytnyk <volodymyrx.mytnyk@intel.com>
28 * Taras Chornyi <tarasx.chornyi@intel.com>
29 * Krzysztof Matczak <krzysztofx.matczak@intel.com>
36 #include <sys/socket.h>
40 #define MCELOG_PLUGIN "mcelog"
41 #define MCELOG_BUFF_SIZE 1024
42 #define MCELOG_POLL_TIMEOUT 1000 /* ms */
43 #define MCELOG_SOCKET_STR "SOCKET"
44 #define MCELOG_DIMM_NAME "DMI_NAME"
45 #define MCELOG_CORRECTED_ERR "corrected memory errors:"
46 #define MCELOG_UNCORRECTED_ERR "uncorrected memory errors:"
48 typedef struct mcelog_config_s {
49 char logfile[PATH_MAX]; /* mcelog logfile */
50 pthread_t tid; /* poll thread id */
53 typedef struct socket_adapter_s socket_adapter_t;
55 struct socket_adapter_s {
56 int sock_fd; /* mcelog server socket fd */
57 struct sockaddr_un unix_sock; /* mcelog client socket */
58 pthread_rwlock_t lock;
59 /* function pointers for socket operations */
60 int (*write)(socket_adapter_t *self, const char *msg, const size_t len);
61 int (*reinit)(socket_adapter_t *self);
62 int (*receive)(socket_adapter_t *self, FILE **p_file);
63 int (*close)(socket_adapter_t *self);
66 typedef struct mcelog_memory_rec_s {
67 int corrected_err_total; /* x total*/
68 int corrected_err_timed; /* x in 24h*/
69 char corrected_err_timed_period[DATA_MAX_NAME_LEN];
70 int uncorrected_err_total; /* x total*/
71 int uncorrected_err_timed; /* x in 24h*/
72 char uncorrected_err_timed_period[DATA_MAX_NAME_LEN];
73 char location[DATA_MAX_NAME_LEN]; /* SOCKET x CHANNEL x DIMM x*/
74 char dimm_name[DATA_MAX_NAME_LEN]; /* DMI_NAME "DIMM_F1" */
75 } mcelog_memory_rec_t;
77 static int socket_close(socket_adapter_t *self);
78 static int socket_write(socket_adapter_t *self, const char *msg,
80 static int socket_reinit(socket_adapter_t *self);
81 static int socket_receive(socket_adapter_t *self, FILE **p_file);
83 static mcelog_config_t g_mcelog_config = {
84 .logfile = "/var/log/mcelog", .tid = 0,
87 static socket_adapter_t socket_adapter = {
91 .sun_family = AF_UNIX, .sun_path = "/var/run/mcelog-client",
93 .lock = PTHREAD_RWLOCK_INITIALIZER,
94 .close = socket_close,
95 .write = socket_write,
96 .reinit = socket_reinit,
97 .receive = socket_receive,
100 static _Bool mcelog_thread_running = 0;
102 static int mcelog_config(oconfig_item_t *ci) {
103 for (int i = 0; i < ci->children_num; i++) {
104 oconfig_item_t *child = ci->children + i;
105 if (strcasecmp("McelogClientSocket", child->key) == 0) {
106 if (cf_util_get_string_buffer(child, socket_adapter.unix_sock.sun_path,
107 sizeof(socket_adapter.unix_sock.sun_path)) <
109 ERROR("%s: Invalid configuration option: \"%s\".", MCELOG_PLUGIN,
113 } else if (strcasecmp("McelogLogfile", child->key) == 0) {
114 if (cf_util_get_string_buffer(child, g_mcelog_config.logfile,
115 sizeof(g_mcelog_config.logfile)) < 0) {
116 ERROR("%s: Invalid configuration option: \"%s\".", MCELOG_PLUGIN,
121 ERROR("%s: Invalid configuration option: \"%s\".", MCELOG_PLUGIN,
129 static int socket_close(socket_adapter_t *self) {
131 pthread_rwlock_rdlock(&self->lock);
132 if (fcntl(self->sock_fd, F_GETFL) != -1) {
133 if (shutdown(self->sock_fd, SHUT_RDWR) != 0) {
134 char errbuf[MCELOG_BUFF_SIZE];
135 ERROR("%s: Socket shutdown failed: %s", MCELOG_PLUGIN,
136 sstrerror(errno, errbuf, sizeof(errbuf)));
139 close(self->sock_fd);
141 pthread_rwlock_unlock(&self->lock);
145 static int socket_write(socket_adapter_t *self, const char *msg,
148 pthread_rwlock_rdlock(&self->lock);
149 if (swrite(self->sock_fd, msg, len) < 0)
151 pthread_rwlock_unlock(&self->lock);
155 static void mcelog_dispatch_notification(notification_t *n) {
157 ERROR(MCELOG_PLUGIN ": %s: NULL pointer", __FUNCTION__);
161 sstrncpy(n->host, hostname_g, sizeof(n->host));
162 sstrncpy(n->type, "gauge", sizeof(n->type));
163 plugin_dispatch_notification(n);
165 plugin_notification_meta_free(n->meta);
168 static int socket_reinit(socket_adapter_t *self) {
169 char errbuff[MCELOG_BUFF_SIZE];
171 cdtime_t interval = plugin_get_interval();
172 struct timeval socket_timeout = CDTIME_T_TO_TIMEVAL(interval);
174 /* synchronization via write lock since sock_fd may be changed here */
175 pthread_rwlock_wrlock(&self->lock);
176 self->sock_fd = socket(PF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
177 if (self->sock_fd < 0) {
178 ERROR("%s: Could not create a socket. %s", MCELOG_PLUGIN,
179 sstrerror(errno, errbuff, sizeof(errbuff)));
180 pthread_rwlock_unlock(&self->lock);
184 /* Set socket timeout option */
185 if (setsockopt(self->sock_fd, SOL_SOCKET, SO_SNDTIMEO,
186 &socket_timeout, sizeof(socket_timeout)) < 0)
187 ERROR("%s: Failed to set the socket timeout option.", MCELOG_PLUGIN);
189 /* downgrading to read lock due to possible recursive read locks
190 * in self->close(self) call */
191 pthread_rwlock_unlock(&self->lock);
192 pthread_rwlock_rdlock(&self->lock);
193 if (connect(self->sock_fd, (struct sockaddr *)&(self->unix_sock),
194 sizeof(self->unix_sock)) < 0) {
195 ERROR("%s: Failed to connect to mcelog server. %s", MCELOG_PLUGIN,
196 sstrerror(errno, errbuff, sizeof(errbuff)));
201 mcelog_dispatch_notification(
202 &(notification_t){.severity = NOTIF_OKAY,
204 .message = "Connected to mcelog server",
205 .plugin = MCELOG_PLUGIN,
206 .type_instance = "mcelog_status"});
208 pthread_rwlock_unlock(&self->lock);
212 static int mcelog_prepare_notification(notification_t *n,
213 mcelog_memory_rec_t mr) {
217 if (plugin_notification_meta_add_string(n, MCELOG_SOCKET_STR, mr.location) <
219 ERROR("%s: add memory location meta data failed", MCELOG_PLUGIN);
222 if (strlen(mr.dimm_name) > 0)
223 if (plugin_notification_meta_add_string(n, MCELOG_DIMM_NAME, mr.dimm_name) <
225 ERROR("%s: add DIMM name meta data failed", MCELOG_PLUGIN);
226 plugin_notification_meta_free(n->meta);
229 if (plugin_notification_meta_add_signed_int(n, MCELOG_CORRECTED_ERR,
230 mr.corrected_err_total) < 0) {
231 ERROR("%s: add corrected errors meta data failed", MCELOG_PLUGIN);
232 plugin_notification_meta_free(n->meta);
235 if (plugin_notification_meta_add_signed_int(
236 n, "corrected memory timed errors", mr.corrected_err_timed) < 0) {
237 ERROR("%s: add corrected timed errors meta data failed", MCELOG_PLUGIN);
238 plugin_notification_meta_free(n->meta);
241 if (plugin_notification_meta_add_string(n, "corrected errors time period",
242 mr.corrected_err_timed_period) < 0) {
243 ERROR("%s: add corrected errors period meta data failed", MCELOG_PLUGIN);
244 plugin_notification_meta_free(n->meta);
247 if (plugin_notification_meta_add_signed_int(n, MCELOG_UNCORRECTED_ERR,
248 mr.uncorrected_err_total) < 0) {
249 ERROR("%s: add corrected errors meta data failed", MCELOG_PLUGIN);
250 plugin_notification_meta_free(n->meta);
253 if (plugin_notification_meta_add_signed_int(
254 n, "uncorrected memory timed errors", mr.uncorrected_err_timed) < 0) {
255 ERROR("%s: add corrected timed errors meta data failed", MCELOG_PLUGIN);
256 plugin_notification_meta_free(n->meta);
259 if (plugin_notification_meta_add_string(n, "uncorrected errors time period",
260 mr.uncorrected_err_timed_period) <
262 ERROR("%s: add corrected errors period meta data failed", MCELOG_PLUGIN);
263 plugin_notification_meta_free(n->meta);
270 static int mcelog_submit(mcelog_memory_rec_t mr) {
272 value_list_t vl = VALUE_LIST_INIT;
276 sstrncpy(vl.plugin, MCELOG_PLUGIN, sizeof(vl.plugin));
277 sstrncpy(vl.type, "errors", sizeof(vl.type));
278 if (strlen(mr.dimm_name) > 0) {
279 ssnprintf(vl.plugin_instance, sizeof(vl.plugin_instance), "%s_%s",
280 mr.location, mr.dimm_name);
282 sstrncpy(vl.plugin_instance, mr.location, sizeof(vl.plugin_instance));
284 sstrncpy(vl.type_instance, "corrected_memory_errors",
285 sizeof(vl.type_instance));
286 vl.values = &(value_t){.derive = (derive_t)mr.corrected_err_total};
287 plugin_dispatch_values(&vl);
289 ssnprintf(vl.type_instance, sizeof(vl.type_instance),
290 "corrected_memory_errors_in_%s", mr.corrected_err_timed_period);
291 vl.values = &(value_t){.derive = (derive_t)mr.corrected_err_timed};
292 plugin_dispatch_values(&vl);
294 sstrncpy(vl.type_instance, "uncorrected_memory_errors",
295 sizeof(vl.type_instance));
296 vl.values = &(value_t){.derive = (derive_t)mr.uncorrected_err_total};
297 plugin_dispatch_values(&vl);
299 ssnprintf(vl.type_instance, sizeof(vl.type_instance),
300 "uncorrected_memory_errors_in_%s", mr.uncorrected_err_timed_period);
301 vl.values = &(value_t){.derive = (derive_t)mr.uncorrected_err_timed};
302 plugin_dispatch_values(&vl);
307 static int parse_memory_info(FILE *p_file, mcelog_memory_rec_t *memory_record) {
308 char buf[DATA_MAX_NAME_LEN] = {0};
309 while (fgets(buf, sizeof(buf), p_file)) {
310 /* Got empty line or "done" */
311 if ((!strncmp("\n", buf, strlen(buf))) ||
312 (!strncmp(buf, "done\n", strlen(buf))))
316 if (!strncmp(buf, MCELOG_SOCKET_STR, strlen(MCELOG_SOCKET_STR))) {
317 sstrncpy(memory_record->location, buf, strlen(buf));
318 /* replace spaces with '_' */
319 for (size_t i = 0; i < strlen(memory_record->location); i++)
320 if (memory_record->location[i] == ' ')
321 memory_record->location[i] = '_';
322 DEBUG("%s: Got SOCKET INFO %s", MCELOG_PLUGIN, memory_record->location);
324 if (!strncmp(buf, MCELOG_DIMM_NAME, strlen(MCELOG_DIMM_NAME))) {
326 char *saveptr = NULL;
327 name = strtok_r(buf, "\"", &saveptr);
328 if (name != NULL && saveptr != NULL) {
329 name = strtok_r(NULL, "\"", &saveptr);
331 sstrncpy(memory_record->dimm_name, name,
332 sizeof(memory_record->dimm_name));
333 DEBUG("%s: Got DIMM NAME %s", MCELOG_PLUGIN,
334 memory_record->dimm_name);
338 if (!strncmp(buf, MCELOG_CORRECTED_ERR, strlen(MCELOG_CORRECTED_ERR))) {
340 if (fgets(buf, sizeof(buf), p_file) != NULL) {
341 sscanf(buf, "\t%d total", &(memory_record->corrected_err_total));
342 DEBUG("%s: Got corrected error total %d", MCELOG_PLUGIN,
343 memory_record->corrected_err_total);
345 if (fgets(buf, sizeof(buf), p_file) != NULL) {
346 sscanf(buf, "\t%d in %s", &(memory_record->corrected_err_timed),
347 memory_record->corrected_err_timed_period);
348 DEBUG("%s: Got timed corrected errors %d in %s", MCELOG_PLUGIN,
349 memory_record->corrected_err_total,
350 memory_record->corrected_err_timed_period);
353 if (!strncmp(buf, MCELOG_UNCORRECTED_ERR, strlen(MCELOG_UNCORRECTED_ERR))) {
354 if (fgets(buf, sizeof(buf), p_file) != NULL) {
355 sscanf(buf, "\t%d total", &(memory_record->uncorrected_err_total));
356 DEBUG("%s: Got uncorrected error total %d", MCELOG_PLUGIN,
357 memory_record->uncorrected_err_total);
359 if (fgets(buf, sizeof(buf), p_file) != NULL) {
360 sscanf(buf, "\t%d in %s", &(memory_record->uncorrected_err_timed),
361 memory_record->uncorrected_err_timed_period);
362 DEBUG("%s: Got timed uncorrected errors %d in %s", MCELOG_PLUGIN,
363 memory_record->uncorrected_err_total,
364 memory_record->uncorrected_err_timed_period);
367 memset(buf, 0, sizeof(buf));
369 /* parsing definitely finished */
373 static void poll_worker_cleanup(void *arg) {
374 mcelog_thread_running = 0;
375 FILE *p_file = *((FILE **)arg);
381 static int socket_receive(socket_adapter_t *self, FILE **pp_file) {
383 pthread_rwlock_rdlock(&self->lock);
384 struct pollfd poll_fd = {
385 .fd = self->sock_fd, .events = POLLIN | POLLPRI,
388 if ((res = poll(&poll_fd, 1, MCELOG_POLL_TIMEOUT)) <= 0) {
389 if (res != 0 && errno != EINTR) {
390 char errbuf[MCELOG_BUFF_SIZE];
391 ERROR("mcelog: poll failed: %s",
392 sstrerror(errno, errbuf, sizeof(errbuf)));
394 pthread_rwlock_unlock(&self->lock);
398 if (poll_fd.revents & (POLLERR | POLLHUP | POLLNVAL)) {
399 /* connection is broken */
400 ERROR("%s: Connection to socket is broken", MCELOG_PLUGIN);
401 if (poll_fd.revents & (POLLERR | POLLHUP)) {
402 mcelog_dispatch_notification(
403 &(notification_t){.severity = NOTIF_FAILURE,
405 .message = "Connection to mcelog socket is broken.",
406 .plugin = MCELOG_PLUGIN,
407 .type_instance = "mcelog_status"});
409 pthread_rwlock_unlock(&self->lock);
413 if (!(poll_fd.revents & (POLLIN | POLLPRI))) {
414 INFO("%s: No data to read", MCELOG_PLUGIN);
415 pthread_rwlock_unlock(&self->lock);
419 if ((*pp_file = fdopen(dup(self->sock_fd), "r")) == NULL)
422 pthread_rwlock_unlock(&self->lock);
426 static void *poll_worker(__attribute__((unused)) void *arg) {
427 char errbuf[MCELOG_BUFF_SIZE];
428 mcelog_thread_running = 1;
429 FILE **pp_file = calloc(1, sizeof(*pp_file));
430 if (pp_file == NULL) {
431 ERROR("mcelog: memory allocation failed: %s",
432 sstrerror(errno, errbuf, sizeof(errbuf)));
433 pthread_exit((void *)1);
436 pthread_cleanup_push(poll_worker_cleanup, pp_file);
440 int res = socket_adapter.receive(&socket_adapter, pp_file);
442 socket_adapter.close(&socket_adapter);
443 while (socket_adapter.reinit(&socket_adapter) != 0) {
444 nanosleep(&CDTIME_T_TO_TIMESPEC(MS_TO_CDTIME_T(MCELOG_POLL_TIMEOUT)),
449 /* timeout or no data to read */
453 if (*pp_file == NULL)
456 mcelog_memory_rec_t memory_record = {0};
457 while (parse_memory_info(*pp_file, &memory_record)) {
458 /* Check if location was successfully parsed */
459 if (memory_record.location[0] == '\0') {
460 memset(&memory_record, 0, sizeof(memory_record));
464 notification_t n = {.severity = NOTIF_OKAY,
466 .message = "Got memory errors info.",
467 .plugin = MCELOG_PLUGIN,
468 .type_instance = "memory_erros"};
470 if (mcelog_prepare_notification(&n, memory_record) == 0)
471 mcelog_dispatch_notification(&n);
472 if (mcelog_submit(memory_record) != 0)
473 ERROR("%s: Failed to submit memory errors", MCELOG_PLUGIN);
474 memset(&memory_record, 0, sizeof(memory_record));
481 mcelog_thread_running = 0;
482 pthread_cleanup_pop(1);
486 static int mcelog_init(void) {
487 if (socket_adapter.reinit(&socket_adapter) != 0) {
488 ERROR("%s: Cannot connect to client socket", MCELOG_PLUGIN);
492 if (plugin_thread_create(&g_mcelog_config.tid, NULL, poll_worker, NULL,
494 ERROR("%s: Error creating poll thread.", MCELOG_PLUGIN);
500 static int get_memory_machine_checks(void) {
501 static const char dump[] = "dump all bios\n";
502 int ret = socket_adapter.write(&socket_adapter, dump, sizeof(dump));
504 ERROR("%s: SENT DUMP REQUEST FAILED", MCELOG_PLUGIN);
506 DEBUG("%s: SENT DUMP REQUEST OK", MCELOG_PLUGIN);
510 static int mcelog_read(__attribute__((unused)) user_data_t *ud) {
511 DEBUG("%s: %s", MCELOG_PLUGIN, __FUNCTION__);
513 if (get_memory_machine_checks() != 0)
514 ERROR("%s: MACHINE CHECK INFO NOT AVAILABLE", MCELOG_PLUGIN);
519 static int mcelog_shutdown(void) {
521 if (mcelog_thread_running) {
522 pthread_cancel(g_mcelog_config.tid);
523 if (pthread_join(g_mcelog_config.tid, NULL) != 0) {
524 ERROR("%s: Stopping thread failed.", MCELOG_PLUGIN);
529 ret = socket_adapter.close(&socket_adapter) || ret;
530 pthread_rwlock_destroy(&(socket_adapter.lock));
534 void module_register(void) {
535 plugin_register_complex_config(MCELOG_PLUGIN, mcelog_config);
536 plugin_register_init(MCELOG_PLUGIN, mcelog_init);
537 plugin_register_complex_read(NULL, MCELOG_PLUGIN, mcelog_read, 0, NULL);
538 plugin_register_shutdown(MCELOG_PLUGIN, mcelog_shutdown);