#include "collectd.h"
-#include "common.h"
#include "plugin.h"
+#include "utils/common/common.h"
+#include "utils/ignorelist/ignorelist.h"
#include "utils_complain.h"
-#include "utils_ignorelist.h"
#include <asm/types.h>
#include <errno.h>
uint32_t status;
uint32_t prev_status;
uint32_t sent;
- long long unsigned int timestamp;
+ cdtime_t timestamp;
struct interface_list_s *next;
};
static int connectivity_netlink_thread_error = 0;
static pthread_t connectivity_netlink_thread_id;
static int connectivity_dequeue_thread_loop = 0;
-static int connectivity_dequeue_thread_error = 0;
static pthread_t connectivity_dequeue_thread_id;
-static pthread_mutex_t connectivity_lock = PTHREAD_MUTEX_INITIALIZER;
+static pthread_mutex_t connectivity_threads_lock = PTHREAD_MUTEX_INITIALIZER;
+static pthread_mutex_t connectivity_data_lock = PTHREAD_MUTEX_INITIALIZER;
static pthread_cond_t connectivity_cond = PTHREAD_COND_INITIALIZER;
-// static struct mnl_socket *sock;
static int nl_sock = -1;
static int event_id = 0;
+static int statuses_to_send = 0;
static const char *config_keys[] = {"Interface", "IgnoreSelected"};
static int config_keys_num = STATIC_ARRAY_SIZE(config_keys);
/*
- * Prototype
- */
-
-static void
-connectivity_dispatch_notification(const char *interface, const char *type,
- gauge_t value, gauge_t old_value,
- long long unsigned int timestamp);
-
-/*
* Private functions
*/
static int gen_message_payload(int state, int old_state, const char *interface,
- long long unsigned int timestamp, char **buf) {
+ cdtime_t timestamp, char **buf) {
const unsigned char *buf2;
yajl_gen g;
char json_str[DATA_MAX_NAME_LEN];
#if !defined(HAVE_YAJL_V2)
- yajl_gen_config conf = {};
-
- conf.beautify = 0;
+ yajl_gen_config conf = {0};
#endif
#if HAVE_YAJL_V2
goto err;
event_id = event_id + 1;
- int event_id_len = sizeof(char) * sizeof(int) * 4 + 1;
- memset(json_str, '\0', DATA_MAX_NAME_LEN);
- snprintf(json_str, event_id_len, "%d", event_id);
+ if (snprintf(json_str, sizeof(json_str), "%d", event_id) < 0) {
+ goto err;
+ }
if (yajl_gen_number(g, json_str, strlen(json_str)) != yajl_gen_status_ok) {
goto err;
yajl_gen_status_ok)
goto err;
- int event_name_len = 0;
- event_name_len = event_name_len + strlen(interface); // interface name
- event_name_len = event_name_len + (state == 0 ? 4 : 2); // "down" or "up"
- event_name_len =
- event_name_len + 12; // "interface", 2 spaces and null-terminator
- memset(json_str, '\0', DATA_MAX_NAME_LEN);
- snprintf(json_str, event_name_len, "interface %s %s", interface,
- (state == 0 ? CONNECTIVITY_EVENT_NAME_DOWN_VALUE
- : CONNECTIVITY_EVENT_NAME_UP_VALUE));
+ if (snprintf(json_str, sizeof(json_str), "interface %s %s", interface,
+ (state == 0 ? CONNECTIVITY_EVENT_NAME_DOWN_VALUE
+ : CONNECTIVITY_EVENT_NAME_UP_VALUE)) < 0) {
+ goto err;
+ }
if (yajl_gen_string(g, (u_char *)json_str, strlen(json_str)) !=
yajl_gen_status_ok) {
yajl_gen_status_ok)
goto err;
- int last_epoch_microsec_len =
- sizeof(char) * sizeof(long long unsigned int) * 4 + 1;
- memset(json_str, '\0', DATA_MAX_NAME_LEN);
- snprintf(json_str, last_epoch_microsec_len, "%llu",
- (long long unsigned int)CDTIME_T_TO_US(cdtime()));
+ if (snprintf(json_str, sizeof(json_str), "%" PRIu64,
+ CDTIME_T_TO_US(cdtime())) < 0) {
+ goto err;
+ }
if (yajl_gen_number(g, json_str, strlen(json_str)) != yajl_gen_status_ok) {
goto err;
yajl_gen_status_ok)
goto err;
- int start_epoch_microsec_len =
- sizeof(char) * sizeof(long long unsigned int) * 4 + 1;
- memset(json_str, '\0', DATA_MAX_NAME_LEN);
- snprintf(json_str, start_epoch_microsec_len, "%llu",
- (long long unsigned int)timestamp);
+ if (snprintf(json_str, sizeof(json_str), "%" PRIu64,
+ CDTIME_T_TO_US(timestamp)) < 0) {
+ goto err;
+ }
if (yajl_gen_number(g, json_str, strlen(json_str)) != yajl_gen_status_ok) {
goto err;
(state == 0 ? strlen(CONNECTIVITY_NEW_STATE_FIELD_DOWN_VALUE)
: strlen(CONNECTIVITY_NEW_STATE_FIELD_UP_VALUE));
- if (yajl_gen_string(
- g, (u_char *)(state == 0 ? CONNECTIVITY_NEW_STATE_FIELD_DOWN_VALUE
- : CONNECTIVITY_NEW_STATE_FIELD_UP_VALUE),
- new_state_len) != yajl_gen_status_ok)
+ if (yajl_gen_string(g,
+ (u_char *)(state == 0
+ ? CONNECTIVITY_NEW_STATE_FIELD_DOWN_VALUE
+ : CONNECTIVITY_NEW_STATE_FIELD_UP_VALUE),
+ new_state_len) != yajl_gen_status_ok)
goto err;
// oldState
(old_state == 0 ? strlen(CONNECTIVITY_OLD_STATE_FIELD_DOWN_VALUE)
: strlen(CONNECTIVITY_OLD_STATE_FIELD_UP_VALUE));
- if (yajl_gen_string(
- g, (u_char *)(old_state == 0 ? CONNECTIVITY_OLD_STATE_FIELD_DOWN_VALUE
- : CONNECTIVITY_OLD_STATE_FIELD_UP_VALUE),
- old_state_len) != yajl_gen_status_ok)
+ if (yajl_gen_string(g,
+ (u_char *)(old_state == 0
+ ? CONNECTIVITY_OLD_STATE_FIELD_DOWN_VALUE
+ : CONNECTIVITY_OLD_STATE_FIELD_UP_VALUE),
+ old_state_len) != yajl_gen_status_ok)
goto err;
// stateChangeFieldsVersion
yajl_gen_status_ok)
goto err;
- if (yajl_gen_map_close(g) != yajl_gen_status_ok)
+ // close state change and header fields
+ if (yajl_gen_map_close(g) != yajl_gen_status_ok ||
+ yajl_gen_map_close(g) != yajl_gen_status_ok)
goto err;
// *** END state change fields ***
- if (yajl_gen_map_close(g) != yajl_gen_status_ok)
- goto err;
-
if (yajl_gen_get_buf(g, &buf2, &len) != yajl_gen_status_ok)
goto err;
- *buf = malloc(strlen((char *)buf2) + 1);
+ *buf = strdup((char *)buf2);
if (*buf == NULL) {
- char errbuf[1024];
- ERROR("connectivity plugin: malloc failed during gen_message_payload: %s",
- sstrerror(errno, errbuf, sizeof(errbuf)));
+ ERROR("connectivity plugin: strdup failed during gen_message_payload: %s",
+ STRERRNO);
goto err;
}
- sstrncpy(*buf, (char *)buf2, strlen((char *)buf2) + 1);
-
yajl_gen_free(g);
return 0;
static interface_list_t *add_interface(const char *interface, int status,
int prev_status) {
- interface_list_t *il;
- char *interface2;
+ interface_list_t *il = calloc(1, sizeof(*il));
- il = malloc(sizeof(*il));
if (il == NULL) {
- char errbuf[1024];
- ERROR("connectivity plugin: malloc failed during add_interface: %s",
- sstrerror(errno, errbuf, sizeof(errbuf)));
+ ERROR("connectivity plugin: calloc failed during add_interface: %s",
+ STRERRNO);
return NULL;
}
- interface2 = strdup(interface);
+ char *interface2 = strdup(interface);
if (interface2 == NULL) {
- char errbuf[1024];
sfree(il);
ERROR("connectivity plugin: strdup failed during add_interface: %s",
- sstrerror(errno, errbuf, sizeof(errbuf)));
+ STRERRNO);
return NULL;
}
il->interface = interface2;
il->status = status;
il->prev_status = prev_status;
- il->timestamp = (long long unsigned int)CDTIME_T_TO_US(cdtime());
+ il->timestamp = cdtime();
il->sent = 0;
il->next = interface_list_head;
interface_list_head = il;
}
static int connectivity_link_state(struct nlmsghdr *msg) {
- int retval = 0;
- struct ifinfomsg *ifi = mnl_nlmsg_get_payload(msg);
- struct nlattr *attr;
- const char *dev = NULL;
+ pthread_mutex_lock(&connectivity_data_lock);
- pthread_mutex_lock(&connectivity_lock);
-
- interface_list_t *il = NULL;
+ struct nlattr *attr;
+ struct ifinfomsg *ifi = mnl_nlmsg_get_payload(msg);
/* Scan attribute list for device name. */
mnl_attr_for_each(attr, msg, sizeof(*ifi)) {
ERROR("connectivity plugin: connectivity_link_state: IFLA_IFNAME "
"mnl_attr_validate "
"failed.");
- pthread_mutex_unlock(&connectivity_lock);
+ pthread_mutex_unlock(&connectivity_data_lock);
return MNL_CB_ERROR;
}
- dev = mnl_attr_get_str(attr);
+ const char *dev = mnl_attr_get_str(attr);
// Check the list of interfaces we should monitor, if we've chosen
// a subset. If we don't care about this one, abort.
break;
}
+ interface_list_t *il = NULL;
+
for (il = interface_list_head; il != NULL; il = il->next)
if (strcmp(dev, il->interface) == 0)
break;
- uint32_t prev_status;
-
if (il == NULL) {
// We haven't encountered this interface yet, so add it to the linked list
il = add_interface(dev, LINK_STATE_UNKNOWN, LINK_STATE_UNKNOWN);
}
}
- prev_status = il->status;
+ uint32_t prev_status = il->status;
il->status =
((ifi->ifi_flags & IFF_RUNNING) ? LINK_STATE_UP : LINK_STATE_DOWN);
- il->timestamp = (long long unsigned int)CDTIME_T_TO_US(cdtime());
+ il->timestamp = cdtime();
// If the new status is different than the previous status,
- // store the previous status and set sent to zero
+ // store the previous status and set sent to zero, and set the
+ // global flag to indicate there are statuses to dispatch
if (il->status != prev_status) {
il->prev_status = prev_status;
il->sent = 0;
+ statuses_to_send = 1;
}
DEBUG("connectivity plugin (%llu): Interface %s status is now %s",
- il->timestamp, dev, ((ifi->ifi_flags & IFF_RUNNING) ? "UP" : "DOWN"));
+ (unsigned long long)il->timestamp, dev,
+ ((ifi->ifi_flags & IFF_RUNNING) ? "UP" : "DOWN"));
// no need to loop again, we found the interface name attr
// (otherwise the first if-statement in the loop would
break;
}
- pthread_mutex_unlock(&connectivity_lock);
+ pthread_mutex_unlock(&connectivity_data_lock);
- return retval;
+ return 0;
}
static int msg_handler(struct nlmsghdr *msg) {
- switch (msg->nlmsg_type) {
- case RTM_NEWADDR:
- case RTM_DELADDR:
- case RTM_NEWROUTE:
- case RTM_DELROUTE:
- case RTM_DELLINK:
- // Not of interest in current version
- break;
- case RTM_NEWLINK:
- connectivity_link_state(msg);
- break;
- default:
- ERROR("connectivity plugin: msg_handler: Unknown netlink nlmsg_type %d\n",
- msg->nlmsg_type);
- break;
+ // We are only interested in RTM_NEWLINK messages
+ if (msg->nlmsg_type != RTM_NEWLINK) {
+ return 0;
}
- return 0;
+ return connectivity_link_state(msg);
}
-// static int read_event(struct mnl_socket *nl,
-// int (*msg_handler)(struct nlmsghdr *)) {
-static int read_event(int nl, int (*msg_handler)(struct nlmsghdr *)) {
- int status;
+static int read_event(int (*msg_handler)(struct nlmsghdr *)) {
int ret = 0;
- char buf[4096];
- struct nlmsghdr *h;
int recv_flags = MSG_DONTWAIT;
- // if (nl == NULL)
- // return ret;
-
- if (nl == -1)
- return ret;
+ if (nl_sock == -1 || msg_handler == NULL)
+ return EINVAL;
while (42) {
- pthread_mutex_lock(&connectivity_lock);
+ pthread_mutex_lock(&connectivity_threads_lock);
if (connectivity_netlink_thread_loop <= 0) {
- pthread_mutex_unlock(&connectivity_lock);
+ pthread_mutex_unlock(&connectivity_threads_lock);
return ret;
}
- pthread_mutex_unlock(&connectivity_lock);
+ pthread_mutex_unlock(&connectivity_threads_lock);
- status = recv(nl, buf, sizeof(buf), recv_flags);
+ char buf[4096];
+ int status = recv(nl_sock, buf, sizeof(buf), recv_flags);
if (status < 0) {
// any saved interface status changes. Then continue, but
// block and wait for new messages
if (errno == EWOULDBLOCK || errno == EAGAIN) {
- pthread_mutex_lock(&connectivity_lock);
pthread_cond_signal(&connectivity_cond);
- pthread_mutex_unlock(&connectivity_lock);
recv_flags = 0;
continue;
}
+ if (errno == EINTR) {
+ // Interrupt, so just continue and try again
+ continue;
+ }
+
/* Anything else is an error */
- // ERROR("connectivity plugin: read_event: Error mnl_socket_recvfrom:
- // %d\n",
- // status);
- ERROR("connectivity plugin: read_event: Error recv: %d\n", status);
+ ERROR("connectivity plugin: read_event: Error recv: %d", status);
return status;
}
recv_flags = MSG_DONTWAIT;
if (status == 0) {
- DEBUG("connectivity plugin: read_event: EOF\n");
+ DEBUG("connectivity plugin: read_event: EOF");
}
/* We need to handle more than one message per 'recvmsg' */
- for (h = (struct nlmsghdr *)buf; NLMSG_OK(h, (unsigned int)status);
- h = NLMSG_NEXT(h, status)) {
+ for (struct nlmsghdr *h = (struct nlmsghdr *)buf;
+ NLMSG_OK(h, (unsigned int)status); h = NLMSG_NEXT(h, status)) {
/* Finish reading */
if (h->nlmsg_type == NLMSG_DONE)
return ret;
/* Message is some kind of error */
if (h->nlmsg_type == NLMSG_ERROR) {
- ERROR("connectivity plugin: read_event: Message is an error\n");
+ struct nlmsgerr *l_err = (struct nlmsgerr *)NLMSG_DATA(h);
+ ERROR("connectivity plugin: read_event: Message is an error: %d",
+ l_err->error);
return -1; // Error
}
if (msg_handler) {
ret = (*msg_handler)(h);
if (ret < 0) {
- ERROR("connectivity plugin: read_event: Message handler error %d\n",
+ ERROR("connectivity plugin: read_event: Message handler error %d",
ret);
return ret;
}
} else {
- ERROR("connectivity plugin: read_event: Error NULL message handler\n");
+ ERROR("connectivity plugin: read_event: Error NULL message handler");
return -1;
}
}
return ret;
}
+static void connectivity_dispatch_notification(const char *interface,
+ gauge_t value, gauge_t old_value,
+ cdtime_t timestamp) {
+
+ notification_t n = {
+ .severity = (value == LINK_STATE_UP ? NOTIF_OKAY : NOTIF_FAILURE),
+ .time = cdtime(),
+ .plugin = "connectivity",
+ .type = "gauge",
+ .type_instance = "interface_status",
+ };
+
+ sstrncpy(n.host, hostname_g, sizeof(n.host));
+ sstrncpy(n.plugin_instance, interface, sizeof(n.plugin_instance));
+
+ char *buf = NULL;
+
+ gen_message_payload(value, old_value, interface, timestamp, &buf);
+
+ int status = plugin_notification_meta_add_string(&n, "ves", buf);
+
+ if (status < 0) {
+ sfree(buf);
+ ERROR("connectivity plugin: unable to set notification VES metadata: %s",
+ STRERRNO);
+ return;
+ }
+
+ DEBUG("connectivity plugin: notification VES metadata: %s",
+ n.meta->nm_value.nm_string);
+
+ DEBUG("connectivity plugin: dispatching state %d for interface %s",
+ (int)value, interface);
+
+ plugin_dispatch_notification(&n);
+ plugin_notification_meta_free(n.meta);
+
+ // strdup'd in gen_message_payload
+ if (buf != NULL)
+ sfree(buf);
+}
+
+// NOTE: Caller MUST hold connectivity_data_lock when calling this function
static void send_interface_status() {
for (interface_list_t *il = interface_list_head; il != NULL;
il = il->next) /* {{{ */
{
- uint32_t status;
- uint32_t prev_status;
- uint32_t sent;
-
- status = il->status;
- prev_status = il->prev_status;
- sent = il->sent;
+ uint32_t status = il->status;
+ uint32_t prev_status = il->prev_status;
+ uint32_t sent = il->sent;
if (status != prev_status && sent == 0) {
- connectivity_dispatch_notification(il->interface, "gauge", status,
- prev_status, il->timestamp);
+ connectivity_dispatch_notification(il->interface, status, prev_status,
+ il->timestamp);
il->sent = 1;
}
} /* }}} for (il = interface_list_head; il != NULL; il = il->next) */
+
+ statuses_to_send = 0;
}
-static int read_interface_status() /* {{{ */
+static void read_interface_status() /* {{{ */
{
- pthread_mutex_lock(&connectivity_lock);
-
- // This first attempt is necessary because the netlink thread
- // might have held the lock while this thread was blocked on
- // the lock acquisition just above. And while the netlink thread
- // had the lock, it could have called pthread_cond_singal, which
- // obviously wouldn't have woken this thread, since this thread
- // was not yet waiting on the condition signal. So we need to
- // loop through the interfaces and check if any have changed
- // status before we wait on the condition signal
- send_interface_status();
+ pthread_mutex_lock(&connectivity_data_lock);
- pthread_cond_wait(&connectivity_cond, &connectivity_lock);
+ // If we don't have any interface statuses to dispatch,
+ // then we wait until signalled
+ if (!statuses_to_send)
+ pthread_cond_wait(&connectivity_cond, &connectivity_data_lock);
send_interface_status();
- pthread_mutex_unlock(&connectivity_lock);
-
- return 0;
+ pthread_mutex_unlock(&connectivity_data_lock);
} /* }}} int *read_interface_status */
static void *connectivity_netlink_thread(void *arg) /* {{{ */
{
- pthread_mutex_lock(&connectivity_lock);
+ pthread_mutex_lock(&connectivity_threads_lock);
while (connectivity_netlink_thread_loop > 0) {
- int status;
-
- pthread_mutex_unlock(&connectivity_lock);
+ pthread_mutex_unlock(&connectivity_threads_lock);
- status = read_event(nl_sock, msg_handler);
+ int status = read_event(msg_handler);
- pthread_mutex_lock(&connectivity_lock);
+ pthread_mutex_lock(&connectivity_threads_lock);
if (status < 0) {
connectivity_netlink_thread_error = 1;
break;
}
-
- if (connectivity_netlink_thread_loop <= 0)
- break;
} /* while (connectivity_netlink_thread_loop > 0) */
- pthread_mutex_unlock(&connectivity_lock);
+ pthread_mutex_unlock(&connectivity_threads_lock);
- return ((void *)0);
+ return (void *)0;
} /* }}} void *connectivity_netlink_thread */
static void *connectivity_dequeue_thread(void *arg) /* {{{ */
{
- pthread_mutex_lock(&connectivity_lock);
+ pthread_mutex_lock(&connectivity_threads_lock);
while (connectivity_dequeue_thread_loop > 0) {
- int status;
-
- pthread_mutex_unlock(&connectivity_lock);
-
- status = read_interface_status();
+ pthread_mutex_unlock(&connectivity_threads_lock);
- pthread_mutex_lock(&connectivity_lock);
+ read_interface_status();
- if (status < 0) {
- connectivity_dequeue_thread_error = 1;
- break;
- }
-
- if (connectivity_dequeue_thread_loop <= 0)
- break;
+ pthread_mutex_lock(&connectivity_threads_lock);
} /* while (connectivity_dequeue_thread_loop > 0) */
- pthread_mutex_unlock(&connectivity_lock);
+ pthread_mutex_unlock(&connectivity_threads_lock);
return ((void *)0);
} /* }}} void *connectivity_dequeue_thread */
static int nl_connect() {
- int rc;
- struct sockaddr_nl sa_nl;
+ struct sockaddr_nl sa_nl = {
+ .nl_family = AF_NETLINK,
+ .nl_groups = RTMGRP_LINK,
+ .nl_pid = getpid(),
+ };
nl_sock = socket(AF_NETLINK, SOCK_DGRAM, NETLINK_ROUTE);
if (nl_sock == -1) {
- ERROR("connectivity plugin: socket open failed: %d", errno);
+ ERROR("connectivity plugin: socket open failed: %s", STRERRNO);
return -1;
}
- sa_nl.nl_family = AF_NETLINK;
- sa_nl.nl_groups = RTMGRP_LINK;
- sa_nl.nl_pid = getpid();
-
- rc = bind(nl_sock, (struct sockaddr *)&sa_nl, sizeof(sa_nl));
+ int rc = bind(nl_sock, (struct sockaddr *)&sa_nl, sizeof(sa_nl));
if (rc == -1) {
- ERROR("connectivity plugin: socket bind failed: %d", errno);
+ ERROR("connectivity plugin: socket bind failed: %s", STRERRNO);
close(nl_sock);
+ nl_sock = -1;
return -1;
}
static int start_netlink_thread(void) /* {{{ */
{
- int status;
-
- pthread_mutex_lock(&connectivity_lock);
+ pthread_mutex_lock(&connectivity_threads_lock);
if (connectivity_netlink_thread_loop != 0) {
- pthread_mutex_unlock(&connectivity_lock);
- return (0);
+ pthread_mutex_unlock(&connectivity_threads_lock);
+ return 0;
}
connectivity_netlink_thread_loop = 1;
connectivity_netlink_thread_error = 0;
+ int status;
+
if (nl_sock == -1) {
status = nl_connect();
- if (status != 0)
+ if (status != 0) {
+ pthread_mutex_unlock(&connectivity_threads_lock);
return status;
+ }
}
status = plugin_thread_create(&connectivity_netlink_thread_id,
if (status != 0) {
connectivity_netlink_thread_loop = 0;
ERROR("connectivity plugin: Starting thread failed.");
- pthread_mutex_unlock(&connectivity_lock);
+ pthread_mutex_unlock(&connectivity_threads_lock);
int status2 = close(nl_sock);
if (status2 != 0) {
ERROR("connectivity plugin: failed to close socket %d: %d (%s)", nl_sock,
- status2, strerror(errno));
- } else
- nl_sock = -1;
+ status2, STRERRNO);
+ }
- return (-1);
+ nl_sock = -1;
+
+ return -1;
}
- pthread_mutex_unlock(&connectivity_lock);
+ pthread_mutex_unlock(&connectivity_threads_lock);
return status;
}
static int start_dequeue_thread(void) /* {{{ */
{
- int status;
-
- pthread_mutex_lock(&connectivity_lock);
+ pthread_mutex_lock(&connectivity_threads_lock);
if (connectivity_dequeue_thread_loop != 0) {
- pthread_mutex_unlock(&connectivity_lock);
- return (0);
+ pthread_mutex_unlock(&connectivity_threads_lock);
+ return 0;
}
connectivity_dequeue_thread_loop = 1;
- connectivity_dequeue_thread_error = 0;
- status = plugin_thread_create(&connectivity_dequeue_thread_id,
- /* attr = */ NULL, connectivity_dequeue_thread,
- /* arg = */ (void *)0, "connectivity");
+ int status =
+ plugin_thread_create(&connectivity_dequeue_thread_id,
+ /* attr = */ NULL, connectivity_dequeue_thread,
+ /* arg = */ (void *)0, "connectivity");
if (status != 0) {
connectivity_dequeue_thread_loop = 0;
ERROR("connectivity plugin: Starting dequeue thread failed.");
- pthread_mutex_unlock(&connectivity_lock);
- return (-1);
+ pthread_mutex_unlock(&connectivity_threads_lock);
+ return -1;
}
- pthread_mutex_unlock(&connectivity_lock);
+ pthread_mutex_unlock(&connectivity_threads_lock);
return status;
} /* }}} int start_dequeue_thread */
static int start_threads(void) /* {{{ */
{
- int status, status2;
-
- status = start_netlink_thread();
- status2 = start_dequeue_thread();
+ int status = start_netlink_thread();
+ int status2 = start_dequeue_thread();
- if (status < 0)
+ if (status != 0)
return status;
else
return status2;
static int stop_netlink_thread(int shutdown) /* {{{ */
{
- int status;
+ int socket_status;
if (nl_sock != -1) {
- status = close(nl_sock);
- if (status != 0) {
+ socket_status = close(nl_sock);
+ if (socket_status != 0) {
ERROR("connectivity plugin: failed to close socket %d: %d (%s)", nl_sock,
- status, strerror(errno));
- return (-1);
- } else
- nl_sock = -1;
- }
+ socket_status, STRERRNO);
+ }
- pthread_mutex_lock(&connectivity_lock);
+ nl_sock = -1;
+ } else
+ socket_status = 0;
+
+ pthread_mutex_lock(&connectivity_threads_lock);
if (connectivity_netlink_thread_loop == 0) {
- pthread_mutex_unlock(&connectivity_lock);
- return (-1);
+ pthread_mutex_unlock(&connectivity_threads_lock);
+ // Thread has already been terminated, nothing more to attempt
+ return socket_status;
}
+ // Set thread termination status
connectivity_netlink_thread_loop = 0;
+ pthread_mutex_unlock(&connectivity_threads_lock);
+
+ // Let threads waiting on access to the interface list know to move
+ // on such that they'll see the thread's termination status
pthread_cond_broadcast(&connectivity_cond);
- pthread_mutex_unlock(&connectivity_lock);
+
+ int thread_status;
if (shutdown == 1) {
// Since the thread is blocking, calling pthread_join
DEBUG("connectivity plugin: Canceling netlink thread for process shutdown");
- status = pthread_cancel(connectivity_netlink_thread_id);
+ thread_status = pthread_cancel(connectivity_netlink_thread_id);
- if (status != 0 && status != ESRCH) {
- ERROR("connectivity plugin: Unable to cancel netlink thread: %d", status);
- status = -1;
+ if (thread_status != 0 && thread_status != ESRCH) {
+ ERROR("connectivity plugin: Unable to cancel netlink thread: %d",
+ thread_status);
+ thread_status = -1;
} else
- status = 0;
+ thread_status = 0;
} else {
- status = pthread_join(connectivity_netlink_thread_id, /* return = */ NULL);
- if (status != 0 && status != ESRCH) {
- ERROR("connectivity plugin: Stopping netlink thread failed.");
- status = -1;
+ thread_status =
+ pthread_join(connectivity_netlink_thread_id, /* return = */ NULL);
+ if (thread_status != 0 && thread_status != ESRCH) {
+ ERROR("connectivity plugin: Stopping netlink thread failed: %d",
+ thread_status);
+ thread_status = -1;
} else
- return 0;
+ thread_status = 0;
}
- pthread_mutex_lock(&connectivity_lock);
+ pthread_mutex_lock(&connectivity_threads_lock);
memset(&connectivity_netlink_thread_id, 0,
sizeof(connectivity_netlink_thread_id));
connectivity_netlink_thread_error = 0;
- pthread_mutex_unlock(&connectivity_lock);
+ pthread_mutex_unlock(&connectivity_threads_lock);
DEBUG("connectivity plugin: Finished requesting stop of netlink thread");
- return status;
+ if (socket_status != 0)
+ return socket_status;
+ else
+ return thread_status;
}
-static int stop_dequeue_thread(int shutdown) /* {{{ */
+static int stop_dequeue_thread() /* {{{ */
{
- int status;
-
- pthread_mutex_lock(&connectivity_lock);
+ pthread_mutex_lock(&connectivity_threads_lock);
if (connectivity_dequeue_thread_loop == 0) {
- pthread_mutex_unlock(&connectivity_lock);
- return (-1);
+ pthread_mutex_unlock(&connectivity_threads_lock);
+ return -1;
}
+ // Set thread termination status
connectivity_dequeue_thread_loop = 0;
+ pthread_mutex_unlock(&connectivity_threads_lock);
+
+ // Let threads waiting on access to the interface list know to move
+ // on such that they'll see the threads termination status
pthread_cond_broadcast(&connectivity_cond);
- pthread_mutex_unlock(&connectivity_lock);
- if (shutdown == 1) {
- // Calling pthread_cancel here in
- // the case of a shutdown just assures that the thread is
- // gone and that the process has been fully terminated.
+ // Calling pthread_cancel here just assures that the thread is
+ // gone and that the process has been fully terminated.
- DEBUG("connectivity plugin: Canceling dequeue thread for process shutdown");
+ DEBUG("connectivity plugin: Canceling dequeue thread for process shutdown");
- status = pthread_cancel(connectivity_dequeue_thread_id);
+ int status = pthread_cancel(connectivity_dequeue_thread_id);
- if (status != 0 && status != ESRCH) {
- ERROR("connectivity plugin: Unable to cancel dequeue thread: %d", status);
- status = -1;
- } else
- status = 0;
- } else {
- status = pthread_join(connectivity_dequeue_thread_id, /* return = */ NULL);
- if (status != 0 && status != ESRCH) {
- ERROR("connectivity plugin: Stopping dequeue thread failed.");
- status = -1;
- } else
- status = 0;
- }
+ if (status != 0 && status != ESRCH) {
+ ERROR("connectivity plugin: Unable to cancel dequeue thread: %d", status);
+ status = -1;
+ } else
+ status = 0;
- pthread_mutex_lock(&connectivity_lock);
+ pthread_mutex_lock(&connectivity_threads_lock);
memset(&connectivity_dequeue_thread_id, 0,
sizeof(connectivity_dequeue_thread_id));
- connectivity_dequeue_thread_error = 0;
- pthread_mutex_unlock(&connectivity_lock);
+ pthread_mutex_unlock(&connectivity_threads_lock);
DEBUG("connectivity plugin: Finished requesting stop of dequeue thread");
- return (status);
+ return status;
} /* }}} int stop_dequeue_thread */
-static int stop_threads(int shutdown) /* {{{ */
+static int stop_threads() /* {{{ */
{
- int status, status2;
-
- status = stop_netlink_thread(shutdown);
- status2 = stop_dequeue_thread(shutdown);
+ int status = stop_netlink_thread(1);
+ int status2 = stop_dequeue_thread();
- if (status < 0)
+ if (status != 0)
return status;
else
return status2;
"be monitored");
}
- return (start_threads());
+ return start_threads();
} /* }}} int connectivity_init */
static int connectivity_config(const char *key, const char *value) /* {{{ */
{
if (ignorelist == NULL) {
ignorelist = ignorelist_create(/* invert = */ 1);
+
+ if (ignorelist == NULL)
+ return -1;
}
if (strcasecmp(key, "Interface") == 0) {
invert = 0;
ignorelist_set_invert(ignorelist, invert);
} else {
- return (-1);
+ return -1;
}
- return (0);
+ return 0;
} /* }}} int connectivity_config */
-static void
-connectivity_dispatch_notification(const char *interface, const char *type,
- gauge_t value, gauge_t old_value,
- long long unsigned int timestamp) {
- char *buf = NULL;
- notification_t n = {
- NOTIF_FAILURE, cdtime(), "", "", "connectivity", "", "", "", NULL};
-
- if (value == LINK_STATE_UP)
- n.severity = NOTIF_OKAY;
-
- sstrncpy(n.host, hostname_g, sizeof(n.host));
- sstrncpy(n.plugin_instance, interface, sizeof(n.plugin_instance));
- sstrncpy(n.type, "gauge", sizeof(n.type));
- sstrncpy(n.type_instance, "interface_status", sizeof(n.type_instance));
-
- gen_message_payload(value, old_value, interface, timestamp, &buf);
-
- notification_meta_t *m = calloc(1, sizeof(*m));
-
- if (m == NULL) {
- char errbuf[1024];
- sfree(buf);
- ERROR("connectivity plugin: unable to allocate metadata: %s",
- sstrerror(errno, errbuf, sizeof(errbuf)));
- return;
- }
-
- sstrncpy(m->name, "ves", sizeof(m->name));
- m->nm_value.nm_string = sstrdup(buf);
- m->type = NM_TYPE_STRING;
- n.meta = m;
-
- DEBUG("connectivity plugin: notification message: %s",
- n.meta->nm_value.nm_string);
-
- DEBUG("connectivity plugin: dispatching state %d for interface %s",
- (int)value, interface);
-
- plugin_dispatch_notification(&n);
- plugin_notification_meta_free(n.meta);
-
- // malloc'd in gen_message_payload
- if (buf != NULL)
- sfree(buf);
-}
-
static int connectivity_read(void) /* {{{ */
{
- pthread_mutex_lock(&connectivity_lock);
+ pthread_mutex_lock(&connectivity_threads_lock);
if (connectivity_netlink_thread_error != 0) {
- pthread_mutex_unlock(&connectivity_lock);
+ pthread_mutex_unlock(&connectivity_threads_lock);
ERROR("connectivity plugin: The netlink thread had a problem. Restarting "
"it.");
start_netlink_thread();
- return (-1);
+ return -1;
} /* if (connectivity_netlink_thread_error != 0) */
- if (connectivity_dequeue_thread_error != 0) {
+ pthread_mutex_unlock(&connectivity_threads_lock);
- pthread_mutex_unlock(&connectivity_lock);
-
- ERROR("connectivity plugin: The dequeue thread had a problem. Restarting "
- "it.");
-
- stop_dequeue_thread(0);
-
- start_dequeue_thread();
-
- return (-1);
- } /* if (connectivity_dequeue_thread_error != 0) */
-
- pthread_mutex_unlock(&connectivity_lock);
-
- return (0);
+ return 0;
} /* }}} int connectivity_read */
static int connectivity_shutdown(void) /* {{{ */
{
- interface_list_t *il;
-
DEBUG("connectivity plugin: Shutting down thread.");
- if (stop_threads(1) < 0)
- return (-1);
- il = interface_list_head;
+ int status = stop_threads();
+
+ interface_list_t *il = interface_list_head;
while (il != NULL) {
interface_list_t *il_next;
ignorelist_free(ignorelist);
- return (0);
+ return status;
} /* }}} int connectivity_shutdown */
void module_register(void) {
projects / collectd.git / blobdiff