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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2010 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include <assert.h>
#include <errno.h>
#include <libsysevent.h>
#include <sys/sysevent/eventdefs.h>
#include <sys/sysevent/dev.h>
#include <sys/types.h>
#include <libnvpair.h>
#include <string.h>
#include <unistd.h>
#include "events.h"
#include "ncp.h"
#include "ncu.h"
#include "objects.h"
#include "util.h"
/*
* sysevent_events.c - this file contains routines to retrieve sysevents
* from the system and package them for high level processing.
*/
static sysevent_handle_t *sysevent_handle;
/*
* At present, we only handle EC_DEV_ADD/EC_DEV_REMOVE sysevents of
* subclass ESC_NETWORK. These signify hotplug addition/removal.
* For EC_DEV_ADD, we:
* - extract the driver/instance sysevent attributes
* - combine these to get interface name and create associated NCUs
* at the link/IP level if required
* - enable those instances
* For EC_DEV_REMOVE, we:
* - disable the associated link/IP NCUs
*/
static void
sysevent_handler(sysevent_t *ev)
{
int32_t instance;
char *driver;
char if_name[LIFNAMSIZ];
boolean_t link_added;
nvlist_t *attr_list;
char *event_class = sysevent_get_class_name(ev);
char *event_subclass = sysevent_get_subclass_name(ev);
nwamd_event_t link_event = NULL;
nlog(LOG_DEBUG, "sysevent_handler: event %s/%s", event_class,
event_subclass);
/* Make sure sysevent is of expected class/subclass */
if ((strcmp(event_class, EC_DEV_ADD) != 0 &&
strcmp(event_class, EC_DEV_REMOVE) != 0) ||
strcmp(event_subclass, ESC_NETWORK) != 0) {
nlog(LOG_ERR, "sysevent_handler: unexpected sysevent "
"class/subclass %s/%s", event_class, event_subclass);
return;
}
link_added = (strcmp(event_class, EC_DEV_ADD) == 0);
/*
* Retrieve driver name and instance attributes, and combine to
* get interface name.
*/
if (sysevent_get_attr_list(ev, &attr_list) != 0) {
nlog(LOG_ERR, "sysevent_handler: sysevent_get_attr_list: %m");
return;
}
if (nvlist_lookup_string(attr_list, DEV_DRIVER_NAME, &driver) != 0 ||
nvlist_lookup_int32(attr_list, DEV_INSTANCE, &instance) != 0) {
nlog(LOG_ERR, "sysevent_handler: nvlist_lookup "
"of attributes failed: %m");
nvlist_free(attr_list);
return;
}
(void) snprintf(if_name, LIFNAMSIZ, "%s%d", driver, instance);
nvlist_free(attr_list);
/* Ignore sysevent events for other zones */
if (!nwamd_link_belongs_to_this_zone(if_name))
return;
/* Create event for link */
link_event = nwamd_event_init_link_action(if_name,
link_added ? NWAM_ACTION_ADD : NWAM_ACTION_REMOVE);
if (link_event != NULL)
nwamd_event_enqueue(link_event);
}
/* ARGSUSED0 */
static void *
sysevent_initialization(void *arg)
{
const char *subclass = ESC_NETWORK;
do {
nwamd_escalate();
sysevent_handle = sysevent_bind_handle(sysevent_handler);
nwamd_deescalate();
(void) sleep(1);
} while (sysevent_handle == NULL);
/*
* Subscribe to ESC_NETWORK subclass of EC_DEV_ADD and EC_DEV_REMOVE
* events. As a result, we get sysevent notification of hotplug
* add/remove events, which we handle above in sysevent_handler().
*/
if (sysevent_subscribe_event(sysevent_handle, EC_DEV_ADD, &subclass, 1)
!= 0 ||
sysevent_subscribe_event(sysevent_handle, EC_DEV_REMOVE, &subclass,
1) != 0)
pfail("sysevent_subscribe_event: %s", strerror(errno));
return (NULL);
}
/*
* We can't initialize in the main thread because we may need to wait until
* svc:/system/sysevent:default finishes starting up. So we create a thread to
* initialize in.
*/
void
nwamd_sysevent_events_init(void)
{
int rc;
pthread_attr_t attr;
rc = pthread_attr_init(&attr);
if (rc != 0) {
pfail("nwamd_sysevents_init: pthread_attr_init failed: %s",
strerror(rc));
}
rc = pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
if (rc != 0) {
pfail("nwamd_sysevents_init: pthread_attr_setdetachstate "
"failed: %s", strerror(rc));
}
rc = pthread_create(NULL, &attr, sysevent_initialization, NULL);
if (rc != 0) {
pfail("nwamd_sysevents_init: couldn't start sysevent init "
"thread: %s", strerror(rc));
}
(void) pthread_attr_destroy(&attr);
}
void
nwamd_sysevent_events_fini(void)
{
if (sysevent_handle != NULL) {
nwamd_escalate();
sysevent_unbind_handle(sysevent_handle);
nwamd_deescalate();
}
sysevent_handle = NULL;
}
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