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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 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
* Copyright 2016 Nexenta Systems, Inc.
*/
/*
* datalink syseventd module.
*
* The purpose of this module is to identify all datalink related events,
* and react accordingly.
*/
#include <errno.h>
#include <sys/sysevent/eventdefs.h>
#include <string.h>
#include <libnvpair.h>
#include <librcm.h>
#include <libsysevent.h>
#include "sysevent_signal.h"
extern void syseventd_err_print(char *, ...);
struct event_list {
nvlist_t *ev;
struct event_list *next;
};
static rcm_handle_t *rcm_hdl = NULL;
static boolean_t dl_exiting;
static thread_t dl_notify_tid;
static mutex_t dl_mx;
static cond_t dl_cv;
static struct event_list *dl_events;
/* ARGSUSED */
static void *
datalink_notify_thread(void *arg)
{
struct event_list *tmp_events, *ep;
(void) mutex_lock(&dl_mx);
while (! dl_exiting || dl_events != NULL) {
if (dl_events == NULL) {
(void) cond_wait(&dl_cv, &dl_mx);
continue;
}
tmp_events = dl_events;
dl_events = NULL;
(void) mutex_unlock(&dl_mx);
while (tmp_events != NULL) {
struct sigaction cbuf, dfl;
/*
* Ignore SIGCLD for the
* duration of the rcm_notify_event call.
*/
(void) memset(&dfl, 0, sizeof (dfl));
dfl.sa_handler = SIG_IGN;
(void) sigaction(SIGCHLD, &dfl, &cbuf);
/*
* Send the PHYSLINK_NEW event to network_rcm to update
* the network devices cache accordingly.
*/
if (rcm_notify_event(rcm_hdl, RCM_RESOURCE_PHYSLINK_NEW,
0, tmp_events->ev, NULL) != RCM_SUCCESS)
syseventd_err_print("datalink_mod: Can not "
"notify event: %s\n", strerror(errno));
(void) sigaction(SIGCHLD, &cbuf, NULL);
ep = tmp_events;
tmp_events = tmp_events->next;
nvlist_free(ep->ev);
free(ep);
}
(void) mutex_lock(&dl_mx);
}
(void) mutex_unlock(&dl_mx);
return (NULL);
}
/*ARGSUSED*/
static int
datalink_deliver_event(sysevent_t *ev, int unused)
{
const char *class = sysevent_get_class_name(ev);
const char *subclass = sysevent_get_subclass_name(ev);
nvlist_t *nvl;
struct event_list *newp, **elpp;
if (strcmp(class, EC_DATALINK) != 0 ||
strcmp(subclass, ESC_DATALINK_PHYS_ADD) != 0) {
return (0);
}
if (sysevent_get_attr_list(ev, &nvl) != 0)
return (EINVAL);
/*
* rcm_notify_event() needs to be called asynchronously otherwise when
* sysevent queue is full, deadlock will happen.
*/
if ((newp = malloc(sizeof (struct event_list))) == NULL)
return (ENOMEM);
newp->ev = nvl;
newp->next = NULL;
/*
* queue up at the end of the event list and signal notify_thread to
* process it.
*/
(void) mutex_lock(&dl_mx);
elpp = &dl_events;
while (*elpp != NULL)
elpp = &(*elpp)->next;
*elpp = newp;
(void) cond_signal(&dl_cv);
(void) mutex_unlock(&dl_mx);
return (0);
}
static struct slm_mod_ops datalink_mod_ops = {
SE_MAJOR_VERSION,
SE_MINOR_VERSION,
SE_MAX_RETRY_LIMIT,
datalink_deliver_event
};
struct slm_mod_ops *
slm_init()
{
dl_events = NULL;
dl_exiting = B_FALSE;
if (rcm_alloc_handle(NULL, 0, NULL, &rcm_hdl) != RCM_SUCCESS)
return (NULL);
(void) mutex_init(&dl_mx, USYNC_THREAD, NULL);
(void) cond_init(&dl_cv, USYNC_THREAD, NULL);
if (thr_create(NULL, 0, datalink_notify_thread, NULL, 0,
&dl_notify_tid) != 0) {
(void) rcm_free_handle(rcm_hdl);
(void) mutex_destroy(&dl_mx);
(void) cond_destroy(&dl_cv);
return (NULL);
}
return (&datalink_mod_ops);
}
void
slm_fini()
{
(void) mutex_lock(&dl_mx);
dl_exiting = B_TRUE;
(void) cond_signal(&dl_cv);
(void) mutex_unlock(&dl_mx);
(void) thr_join(dl_notify_tid, NULL, NULL);
(void) mutex_destroy(&dl_mx);
(void) cond_destroy(&dl_cv);
(void) rcm_free_handle(rcm_hdl);
rcm_hdl = NULL;
}
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