fixed rebase conflicts

Signed-off-by: Krzysztof Matczak <krzysztofx.matczak@intel.com>

diff --git a/Makefile.am b/Makefile.am
index 306c2bd7d7af3349d300415cd179c71082fe3af1..9f33cdc64ebc0e7fd6b31b2ff6fff60a505e23e6 100644 (file)
--- a/Makefile.am
+++ b/Makefile.am
@@ -1041,6 +1041,13 @@ mbmon_la_LIBADD += -lsocket
 endif
 endif
 
+if BUILD_PLUGIN_MCELOG
+pkglib_LTLIBRARIES += mcelog.la
+mcelog_la_SOURCES = mcelog.c
+mcelog_la_LDFLAGS = $(PLUGIN_LDFLAGS)
+mcelog_la_LIBADD =
+endif
+
 if BUILD_PLUGIN_MD
 pkglib_LTLIBRARIES += md.la
 md_la_SOURCES = src/md.c

diff --git a/README b/README
index 9e6f9bdcfcf351828934b315be259aa840de4ff1..925f3645c120d25ffa304053cc399519e3880db3 100644 (file)
--- a/README
+++ b/README
@@ -198,14 +198,19 @@ Features
       Queries very detailed usage statistics from wireless LAN adapters and
       interfaces that use the Atheros chipset and the MadWifi driver.
 
-    - md
-      Linux software-RAID device information (number of active, failed, spare
-      and missing disks).
-
     - mbmon
       Motherboard sensors: temperature, fan speed and voltage information,
       using mbmon(1).
 
+    - mcelog
+      Monitor machine check exceptions (hardware errors detected by hardware
+      and reported to software) reported by mcelog and generate appropriate
+      notifications when machine check exceptions are detected.
+
+    - md
+      Linux software-RAID device information (number of active, failed, spare
+      and missing disks).
+
     - memcachec
       Query and parse data from a memcache daemon (memcached).
 

diff --git a/configure.ac b/configure.ac
index b79617b3851be24f8f37dd89a8248ebf0bde7ff5..2d7f3e2a51841061762c03df6e1e47471da4c9c1 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -5877,6 +5877,7 @@ plugin_ipvs="no"
 plugin_irq="no"
 plugin_load="no"
 plugin_log_logstash="no"
+plugin_mcelog="no"
 plugin_memory="no"
 plugin_multimeter="no"
 plugin_nfs="no"
@@ -5925,6 +5926,7 @@ if test "x$ac_system" = "xLinux"; then
   plugin_irq="yes"
   plugin_load="yes"
   plugin_lvm="yes"
+  plugin_mcelog="yes"
   plugin_memory="yes"
   plugin_nfs="yes"
   plugin_numa="yes"
@@ -6286,6 +6288,7 @@ AC_PLUGIN([match_regex],         [yes],                     [The regex match])
 AC_PLUGIN([match_timediff],      [yes],                     [The timediff match])
 AC_PLUGIN([match_value],         [yes],                     [The value match])
 AC_PLUGIN([mbmon],               [yes],                     [Query mbmond])
+AC_PLUGIN([mcelog],              [$plugin_mcelog],          [Machine Check Exceptions notifications])
 AC_PLUGIN([md],                  [$have_linux_raid_md_u_h], [md (Linux software RAID) devices])
 AC_PLUGIN([memcachec],           [$with_libmemcached],      [memcachec statistics])
 AC_PLUGIN([memcached],           [yes],                     [memcached statistics])
@@ -6709,6 +6712,7 @@ AC_MSG_RESULT([    match_regex . . . . . $enable_match_regex])
 AC_MSG_RESULT([    match_timediff  . . . $enable_match_timediff])
 AC_MSG_RESULT([    match_value . . . . . $enable_match_value])
 AC_MSG_RESULT([    mbmon . . . . . . . . $enable_mbmon])
+AC_MSG_RESULT([    mcelog  . . . . . . . $enable_mcelog])
 AC_MSG_RESULT([    md  . . . . . . . . . $enable_md])
 AC_MSG_RESULT([    memcachec . . . . . . $enable_memcachec])
 AC_MSG_RESULT([    memcached . . . . . . $enable_memcached])

diff --git a/src/collectd.conf.in b/src/collectd.conf.in
index 8c1b10ddecfe82c74ee94e745170520c4c1f26b2..62b245606e199fc3eb20050f7600cdda78979f57 100644 (file)
--- a/src/collectd.conf.in
+++ b/src/collectd.conf.in
@@ -142,6 +142,7 @@
 #@BUILD_PLUGIN_LVM_TRUE@LoadPlugin lvm
 #@BUILD_PLUGIN_MADWIFI_TRUE@LoadPlugin madwifi
 #@BUILD_PLUGIN_MBMON_TRUE@LoadPlugin mbmon
+#@BUILD_PLUGIN_MCELOG_TRUE@LoadPlugin mcelog
 #@BUILD_PLUGIN_MD_TRUE@LoadPlugin md
 #@BUILD_PLUGIN_MEMCACHEC_TRUE@LoadPlugin memcachec
 #@BUILD_PLUGIN_MEMCACHED_TRUE@LoadPlugin memcached
@@ -690,6 +691,11 @@
 #      Port "411"
 #</Plugin>
 
+#<Plugin mcelog>
+#      McelogClientSocket "/var/run/mcelog-client"
+#      McelogLogfile "/var/log/mcelog"
+#</Plugin>
+
 #<Plugin md>
 #      Device "/dev/md0"
 #      IgnoreSelected false

diff --git a/src/collectd.conf.pod b/src/collectd.conf.pod
index dc8b1a371f64db5d876575bfb981e02f88ad5d54..e6f771e524141c75db7b9f093c0219283d462d87 100644 (file)
--- a/src/collectd.conf.pod
+++ b/src/collectd.conf.pod
@@ -3322,6 +3322,28 @@ TCP-Port to connect to. Defaults to B<411>.
 
 =back
 
+=head2 Plugin C<mcelog>
+
+The C<mcelog plugin> uses mcelog to retrieve machine check exceptions, etc.
+
+By default the plugin connects to B<"/var/run/mcelog-client"> to check if the
+mcelog server is running. When the server is running, the plugin will tail the
+specified logfile to retrieve machine check exception information and send a
+notification with the details from the logfile. The plugin will use the mcelog
+client protocol to retrieve memory errors.
+
+=over 4
+
+=item B<McelogClientSocket> I<Path>
+Connect to mcelog client socket using the UNIX domain socket at I<Path>.
+Defaults to B<"/var/run/mcelog-client">.
+
+=item B<McelogLogfile> I<Path>
+
+mcelog file to parse. Defaults to B<"/var/log/mcelog">.
+
+=back
+
 =head2 Plugin C<md>
 
 The C<md plugin> collects information from Linux Software-RAID devices (md).

diff --git a/src/mcelog.c b/src/mcelog.c
new file mode 100644 (file)
index 0000000..f1b4318
--- /dev/null
+++ b/src/mcelog.c
@@ -0,0 +1,518 @@
+/*-
+ * collectd - src/mcelog.c
+ * MIT License
+ *
+ * Copyright(c) 2016 Intel Corporation. All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+
+ * Authors:
+ *   Maryam Tahhan <maryam.tahhan@intel.com>
+ *   Volodymyr Mytnyk <volodymyrx.mytnyk@intel.com>
+ *   Taras Chornyi <tarasx.chornyi@intel.com>
+ *   Krzysztof Matczak <krzysztofx.matczak@intel.com>
+ */
+
+#include "common.h"
+#include "collectd.h"
+
+#include <poll.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <unistd.h>
+
+#define MCELOG_PLUGIN "mcelog"
+#define MCELOG_BUFF_SIZE 1024
+#define MCELOG_POLL_TIMEOUT 1000 /* ms */
+#define MCELOG_SOCKET_STR "SOCKET"
+#define MCELOG_DIMM_NAME "DMI_NAME"
+#define MCELOG_CORRECTED_ERR "corrected memory errors:"
+#define MCELOG_UNCORRECTED_ERR "uncorrected memory errors:"
+
+typedef struct mcelog_config_s {
+  char logfile[PATH_MAX]; /* mcelog logfile */
+  pthread_t tid;          /* poll thread id */
+} mcelog_config_t;
+
+typedef struct socket_adapter_s socket_adapter_t;
+
+struct socket_adapter_s {
+  int sock_fd;                  /* mcelog server socket fd */
+  struct sockaddr_un unix_sock; /* mcelog client socket */
+  pthread_rwlock_t lock;
+  /* function pointers for socket operations */
+  int (*write)(socket_adapter_t *self, const char *msg, const size_t len);
+  int (*reinit)(socket_adapter_t *self);
+  int (*receive)(socket_adapter_t *self, FILE **p_file);
+  int (*close)(socket_adapter_t *self);
+};
+
+typedef struct mcelog_memory_rec_s {
+  char location[DATA_MAX_NAME_LEN];  /* SOCKET x CHANNEL x DIMM x*/
+  char dimm_name[DATA_MAX_NAME_LEN]; /* DMI_NAME "DIMM_F1" */
+  int corrected_err_total;           /* x total*/
+  int corrected_err_timed;           /* x in 24h*/
+  char corrected_err_timed_period[DATA_MAX_NAME_LEN];
+  int uncorrected_err_total; /* x total*/
+  int uncorrected_err_timed; /* x in 24h*/
+  char uncorrected_err_timed_period[DATA_MAX_NAME_LEN];
+} mcelog_memory_rec_t;
+
+static int socket_close(socket_adapter_t *self);
+static int socket_write(socket_adapter_t *self, const char *msg,
+                        const size_t len);
+static int socket_reinit(socket_adapter_t *self);
+static int socket_receive(socket_adapter_t *self, FILE **p_file);
+
+static mcelog_config_t g_mcelog_config = {
+    .logfile = "/var/log/mcelog", .tid = 0,
+};
+
+static socket_adapter_t socket_adapter = {
+    .sock_fd = -1,
+    .unix_sock =
+        {
+            .sun_family = AF_UNIX, .sun_path = "/var/run/mcelog-client",
+        },
+    .lock = PTHREAD_RWLOCK_INITIALIZER,
+    .close = socket_close,
+    .write = socket_write,
+    .reinit = socket_reinit,
+    .receive = socket_receive,
+};
+
+static _Bool mcelog_thread_running = 0;
+
+static int mcelog_config(oconfig_item_t *ci) {
+  for (int i = 0; i < ci->children_num; i++) {
+    oconfig_item_t *child = ci->children + i;
+    if (strcasecmp("McelogClientSocket", child->key) == 0) {
+      if (cf_util_get_string_buffer(child, socket_adapter.unix_sock.sun_path,
+                                    sizeof(socket_adapter.unix_sock.sun_path)) <
+          0) {
+        ERROR("%s: Invalid configuration option: \"%s\".", MCELOG_PLUGIN,
+              child->key);
+        return -1;
+      }
+    } else if (strcasecmp("McelogLogfile", child->key) == 0) {
+      if (cf_util_get_string_buffer(child, g_mcelog_config.logfile,
+                                    sizeof(g_mcelog_config.logfile)) < 0) {
+        ERROR("%s: Invalid configuration option: \"%s\".", MCELOG_PLUGIN,
+              child->key);
+        return -1;
+      }
+    } else {
+      ERROR("%s: Invalid configuration option: \"%s\".", MCELOG_PLUGIN,
+            child->key);
+      return -1;
+    }
+  }
+  return (0);
+}
+
+static int socket_close(socket_adapter_t *self) {
+  int ret = 0;
+  pthread_rwlock_rdlock(&self->lock);
+  if (fcntl(self->sock_fd, F_GETFL) != -1) {
+    if (shutdown(self->sock_fd, SHUT_RDWR) != 0) {
+      char errbuf[MCELOG_BUFF_SIZE];
+      ERROR("%s: Socket shutdown failed: %s", MCELOG_PLUGIN,
+            sstrerror(errno, errbuf, sizeof(errbuf)));
+      ret = -1;
+    }
+    close(self->sock_fd);
+  }
+  pthread_rwlock_unlock(&self->lock);
+  return ret;
+}
+
+static int socket_write(socket_adapter_t *self, const char *msg,
+                        const size_t len) {
+  int ret = 0;
+  pthread_rwlock_rdlock(&self->lock);
+  if (swrite(self->sock_fd, msg, len) < 0)
+    ret = -1;
+  pthread_rwlock_unlock(&self->lock);
+  return ret;
+}
+
+static int socket_reinit(socket_adapter_t *self) {
+  char errbuff[MCELOG_BUFF_SIZE];
+  int flags;
+  int ret = -1;
+  cdtime_t interval = plugin_get_interval();
+  struct timeval socket_timeout = CDTIME_T_TO_TIMEVAL(interval);
+
+  /* synchronization via write lock since sock_fd may be changed here */
+  pthread_rwlock_wrlock(&self->lock);
+  self->sock_fd = socket(PF_UNIX, SOCK_STREAM, 0);
+  if (self->sock_fd < 0) {
+    ERROR("%s: Could not create a socket. %s", MCELOG_PLUGIN,
+          sstrerror(errno, errbuff, sizeof(errbuff)));
+    pthread_rwlock_unlock(&self->lock);
+    return ret;
+  }
+
+  flags = fcntl(self->sock_fd, F_GETFL, 0);
+  flags |= O_NONBLOCK;
+  fcntl(self->sock_fd, F_SETFL, flags);
+
+  /* Set socket timeout option */
+  if (setsockopt(self->sock_fd, SOL_SOCKET, SO_SNDTIMEO,
+                 (char *)&socket_timeout, sizeof(socket_timeout)) < 0)
+    ERROR("%s: Failed to set the socket timeout option.", MCELOG_PLUGIN);
+
+  /* downgrading to read lock due to possible recursive read locks
+   * in self->close(self) call */
+  pthread_rwlock_unlock(&self->lock);
+  pthread_rwlock_rdlock(&self->lock);
+  if (connect(self->sock_fd, (struct sockaddr *)&(self->unix_sock),
+              sizeof(self->unix_sock)) < 0) {
+    ERROR("%s: Failed to connect to mcelog server. %s", MCELOG_PLUGIN,
+          sstrerror(errno, errbuff, sizeof(errbuff)));
+    self->close(self);
+    ret = -1;
+  } else
+    ret = 0;
+
+  pthread_rwlock_unlock(&self->lock);
+  return ret;
+}
+
+static void mcelog_dispatch_notification(notification_t n) {
+  sstrncpy(n.host, hostname_g, sizeof(n.host));
+  sstrncpy(n.type, "gauge", sizeof(n.type));
+  plugin_dispatch_notification(&n);
+}
+
+static int mcelog_prepare_notification(notification_t *n,
+                                       mcelog_memory_rec_t mr) {
+  if (n == NULL)
+    return (-1);
+
+  if (plugin_notification_meta_add_string(n, MCELOG_SOCKET_STR, mr.location) <
+      0) {
+    ERROR("%s: add memory location meta data failed", MCELOG_PLUGIN);
+    return (-1);
+  }
+  if (strlen(mr.dimm_name) > 0)
+    if (plugin_notification_meta_add_string(n, MCELOG_DIMM_NAME, mr.dimm_name) <
+        0) {
+      ERROR("%s: add DIMM name meta data failed", MCELOG_PLUGIN);
+      return (-1);
+    }
+  if (plugin_notification_meta_add_signed_int(n, MCELOG_CORRECTED_ERR,
+                                              mr.corrected_err_total) < 0) {
+    ERROR("%s: add corrected errors meta data failed", MCELOG_PLUGIN);
+    return (-1);
+  }
+  if (plugin_notification_meta_add_signed_int(
+          n, "corrected memory timed errors", mr.corrected_err_timed) < 0) {
+    ERROR("%s: add corrected timed errors meta data failed", MCELOG_PLUGIN);
+    return (-1);
+  }
+  if (plugin_notification_meta_add_string(n, "corrected errors time period",
+                                          mr.corrected_err_timed_period) < 0) {
+    ERROR("%s: add corrected errors period meta data failed", MCELOG_PLUGIN);
+    return (-1);
+  }
+  if (plugin_notification_meta_add_signed_int(n, MCELOG_UNCORRECTED_ERR,
+                                              mr.uncorrected_err_total) < 0) {
+    ERROR("%s: add corrected errors meta data failed", MCELOG_PLUGIN);
+    return (-1);
+  }
+  if (plugin_notification_meta_add_signed_int(
+          n, "uncorrected memory timed errors", mr.uncorrected_err_timed) < 0) {
+    ERROR("%s: add corrected timed errors meta data failed", MCELOG_PLUGIN);
+    return (-1);
+  }
+  if (plugin_notification_meta_add_string(n, "uncorrected errors time period",
+                                          mr.uncorrected_err_timed_period) <
+      0) {
+    ERROR("%s: add corrected errors period meta data failed", MCELOG_PLUGIN);
+    return (-1);
+  }
+
+  return (0);
+}
+
+static int mcelog_submit(mcelog_memory_rec_t mr) {
+
+  value_list_t vl = VALUE_LIST_INIT;
+  vl.values_len = 1;
+  vl.time = cdtime();
+
+  sstrncpy(vl.plugin, MCELOG_PLUGIN, sizeof(vl.plugin));
+  sstrncpy(vl.type, "errors", sizeof(vl.type));
+  if (strlen(mr.dimm_name) > 0) {
+    ssnprintf(vl.plugin_instance, sizeof(vl.plugin_instance), "%s_%s",
+              mr.location, mr.dimm_name);
+  } else
+    sstrncpy(vl.plugin_instance, mr.location, sizeof(vl.plugin_instance));
+
+  sstrncpy(vl.type_instance, "corrected_memory_errors",
+           sizeof(vl.type_instance));
+  vl.values = &(value_t){.derive = (derive_t)mr.corrected_err_total};
+  plugin_dispatch_values(&vl);
+
+  ssnprintf(vl.type_instance, sizeof(vl.type_instance),
+            "corrected_memory_errors_in_%s", mr.corrected_err_timed_period);
+  vl.values = &(value_t){.derive = (derive_t)mr.corrected_err_timed};
+  plugin_dispatch_values(&vl);
+
+  sstrncpy(vl.type_instance, "uncorrected_memory_errors",
+           sizeof(vl.type_instance));
+  vl.values = &(value_t){.derive = (derive_t)mr.uncorrected_err_total};
+  plugin_dispatch_values(&vl);
+
+  ssnprintf(vl.type_instance, sizeof(vl.type_instance),
+            "uncorrected_memory_errors_in_%s", mr.uncorrected_err_timed_period);
+  vl.values = &(value_t){.derive = (derive_t)mr.uncorrected_err_timed};
+  plugin_dispatch_values(&vl);
+
+  return 0;
+}
+
+static int parse_memory_info(FILE *p_file, mcelog_memory_rec_t *memory_record) {
+  char buf[DATA_MAX_NAME_LEN] = {0};
+  while (fgets(buf, sizeof(buf), p_file)) {
+    /* Got empty line or "done" */
+    if ((!strncmp("\n", buf, strlen(buf))) ||
+        (!strncmp(buf, "done\n", strlen(buf))))
+      return 1;
+    if (strlen(buf) < 5)
+      continue;
+    if (!strncmp(buf, MCELOG_SOCKET_STR, strlen(MCELOG_SOCKET_STR))) {
+      sstrncpy(memory_record->location, buf, strlen(buf));
+      /* replace spaces with '_' */
+      for (size_t i = 0; i < strlen(memory_record->location); i++)
+        if (memory_record->location[i] == ' ')
+          memory_record->location[i] = '_';
+      DEBUG("%s: Got SOCKET INFO %s", MCELOG_PLUGIN, memory_record->location);
+    }
+    if (!strncmp(buf, MCELOG_DIMM_NAME, strlen(MCELOG_DIMM_NAME))) {
+      char *name = NULL;
+      char *saveptr = NULL;
+      name = strtok_r(buf, "\"", &saveptr);
+      if (name != NULL && saveptr != NULL) {
+        name = strtok_r(NULL, "\"", &saveptr);
+        if (name != NULL) {
+          sstrncpy(memory_record->dimm_name, name,
+                   sizeof(memory_record->dimm_name));
+          DEBUG("%s: Got DIMM NAME %s", MCELOG_PLUGIN,
+                memory_record->dimm_name);
+        }
+      }
+    }
+    if (!strncmp(buf, MCELOG_CORRECTED_ERR, strlen(MCELOG_CORRECTED_ERR))) {
+      /* Get next line*/
+      if (fgets(buf, sizeof(buf), p_file) != NULL) {
+        sscanf(buf, "\t%d total", &(memory_record->corrected_err_total));
+        DEBUG("%s: Got corrected error total %d", MCELOG_PLUGIN,
+              memory_record->corrected_err_total);
+      }
+      if (fgets(buf, sizeof(buf), p_file) != NULL) {
+        sscanf(buf, "\t%d in %s", &(memory_record->corrected_err_timed),
+               memory_record->corrected_err_timed_period);
+        DEBUG("%s: Got timed corrected errors %d in %s", MCELOG_PLUGIN,
+              memory_record->corrected_err_total,
+              memory_record->corrected_err_timed_period);
+      }
+    }
+    if (!strncmp(buf, MCELOG_UNCORRECTED_ERR, strlen(MCELOG_UNCORRECTED_ERR))) {
+      if (fgets(buf, sizeof(buf), p_file) != NULL) {
+        sscanf(buf, "\t%d total", &(memory_record->uncorrected_err_total));
+        DEBUG("%s: Got uncorrected error total %d", MCELOG_PLUGIN,
+              memory_record->uncorrected_err_total);
+      }
+      if (fgets(buf, sizeof(buf), p_file) != NULL) {
+        sscanf(buf, "\t%d in %s", &(memory_record->uncorrected_err_timed),
+               memory_record->uncorrected_err_timed_period);
+        DEBUG("%s: Got timed uncorrected errors %d in %s", MCELOG_PLUGIN,
+              memory_record->uncorrected_err_total,
+              memory_record->uncorrected_err_timed_period);
+      }
+    }
+    memset(buf, 0, sizeof(buf));
+  }
+  /* parsing definitely finished */
+  return 0;
+}
+
+static void poll_worker_cleanup(void *arg) {
+  mcelog_thread_running = 0;
+  FILE *p_file = *((FILE **)arg);
+  if (p_file != NULL)
+    fclose(p_file);
+  free(arg);
+}
+
+static int socket_receive(socket_adapter_t *self, FILE **pp_file) {
+  int res = -1;
+  pthread_rwlock_rdlock(&self->lock);
+  struct pollfd poll_fd = {
+      .fd = self->sock_fd, .events = POLLIN | POLLPRI,
+  };
+
+  if ((res = poll(&poll_fd, 1, MCELOG_POLL_TIMEOUT)) <= 0) {
+    if (res != 0 && errno != EINTR) {
+      char errbuf[MCELOG_BUFF_SIZE];
+      ERROR("mcelog: poll failed: %s",
+            sstrerror(errno, errbuf, sizeof(errbuf)));
+    }
+    pthread_rwlock_unlock(&self->lock);
+    return res;
+  }
+
+  if (poll_fd.revents & (POLLERR | POLLHUP | POLLNVAL)) {
+    /* connection is broken */
+    ERROR("%s: Connection to socket is broken", MCELOG_PLUGIN);
+    if (poll_fd.revents & (POLLERR | POLLHUP)) {
+      notification_t n = {
+          NOTIF_FAILURE, cdtime(), "", "", MCELOG_PLUGIN, "", "", "", NULL};
+      ssnprintf(n.message, sizeof(n.message),
+                "Connection to mcelog socket is broken.");
+      sstrncpy(n.type_instance, "mcelog_status", sizeof(n.type_instance));
+      mcelog_dispatch_notification(n);
+    }
+    pthread_rwlock_unlock(&self->lock);
+    return -1;
+  }
+
+  if (!(poll_fd.revents & (POLLIN | POLLPRI))) {
+    INFO("%s: No data to read", MCELOG_PLUGIN);
+    pthread_rwlock_unlock(&self->lock);
+    return 0;
+  }
+
+  if ((*pp_file = fdopen(dup(self->sock_fd), "r")) == NULL)
+    res = -1;
+
+  pthread_rwlock_unlock(&self->lock);
+  return res;
+}
+
+static void *poll_worker(__attribute__((unused)) void *arg) {
+  char errbuf[MCELOG_BUFF_SIZE];
+  mcelog_thread_running = 1;
+  FILE **pp_file = calloc(1, sizeof(FILE *));
+  if (pp_file == NULL) {
+    ERROR("mcelog: memory allocation failed: %s",
+          sstrerror(errno, errbuf, sizeof(errbuf)));
+    pthread_exit((void *)1);
+  }
+
+  pthread_cleanup_push(poll_worker_cleanup, pp_file);
+
+  while (1) {
+    int res = 0;
+    /* blocking call */
+    res = socket_adapter.receive(&socket_adapter, pp_file);
+    if (res < 0) {
+      socket_adapter.close(&socket_adapter);
+      if (socket_adapter.reinit(&socket_adapter) != 0) {
+        socket_adapter.close(&socket_adapter);
+        usleep(MCELOG_POLL_TIMEOUT);
+      }
+      continue;
+    }
+    /* timeout or no data to read */
+    else if (res == 0)
+      continue;
+
+    if (*pp_file == NULL)
+      continue;
+
+    mcelog_memory_rec_t memory_record;
+    memset(&memory_record, 0, sizeof(memory_record));
+    while (parse_memory_info(*pp_file, &memory_record)) {
+      notification_t n = {NOTIF_OKAY, cdtime(), "", "",  MCELOG_PLUGIN,
+                          "",         "",       "", NULL};
+      ssnprintf(n.message, sizeof(n.message), "Got memory errors info.");
+      sstrncpy(n.type_instance, "memory_erros", sizeof(n.type_instance));
+      if (mcelog_prepare_notification(&n, memory_record) == 0)
+        mcelog_dispatch_notification(n);
+      if (mcelog_submit(memory_record) != 0)
+        ERROR("%s: Failed to submit memory errors", MCELOG_PLUGIN);
+      memset(&memory_record, 0, sizeof(memory_record));
+    }
+
+    fclose(*pp_file);
+    *pp_file = NULL;
+  }
+
+  mcelog_thread_running = 0;
+  pthread_cleanup_pop(1);
+  return NULL;
+}
+
+static int mcelog_init(void) {
+  if (socket_adapter.reinit(&socket_adapter) != 0) {
+    ERROR("%s: Cannot connect to client socket", MCELOG_PLUGIN);
+    return -1;
+  }
+
+  if (plugin_thread_create(&g_mcelog_config.tid, NULL, poll_worker, NULL,
+                           NULL) != 0) {
+    ERROR("%s: Error creating poll thread.", MCELOG_PLUGIN);
+    return -1;
+  }
+  return 0;
+}
+
+static int get_memory_machine_checks(void) {
+  static const char dump[] = "dump all bios\n";
+  int ret = socket_adapter.write(&socket_adapter, dump, sizeof(dump));
+  if (ret != 0)
+    ERROR("%s: SENT DUMP REQUEST FAILED", MCELOG_PLUGIN);
+  else
+    DEBUG("%s: SENT DUMP REQUEST OK", MCELOG_PLUGIN);
+  return ret;
+}
+
+static int mcelog_read(__attribute__((unused)) user_data_t *ud) {
+  DEBUG("%s: %s", MCELOG_PLUGIN, __FUNCTION__);
+
+  if (get_memory_machine_checks() != 0)
+    ERROR("%s: MACHINE CHECK INFO NOT AVAILABLE", MCELOG_PLUGIN);
+
+  return 0;
+}
+
+static int mcelog_shutdown(void) {
+  int ret = 0;
+  if (mcelog_thread_running) {
+    pthread_cancel(g_mcelog_config.tid);
+    if (pthread_join(g_mcelog_config.tid, NULL) != 0) {
+      ERROR("%s: Stopping thread failed.", MCELOG_PLUGIN);
+      ret = -1;
+    }
+  }
+
+  ret = socket_adapter.close(&socket_adapter) || ret;
+  pthread_rwlock_destroy(&(socket_adapter.lock));
+  return -ret;
+}
+
+void module_register(void) {
+  plugin_register_complex_config(MCELOG_PLUGIN, mcelog_config);
+  plugin_register_init(MCELOG_PLUGIN, mcelog_init);
+  plugin_register_complex_read(NULL, MCELOG_PLUGIN, mcelog_read, 0, NULL);
+  plugin_register_shutdown(MCELOG_PLUGIN, mcelog_shutdown);
+}