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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 2007 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/types.h>
#include <sys/stream.h>
#include <sys/sysmacros.h>
#include <sys/callb.h>
#include <sys/ddi.h>
#include <sys/sunddi.h>
#include <sys/proc.h>
#include <sys/modctl.h>
#include <sys/disp.h>
#include <inet/ip.h>
#include <inet/ipsec_impl.h>
#include <inet/optcom.h>
#include <inet/keysock.h>
/*
* Loader commands for ipsec_loader_sig
*/
#define IPSEC_LOADER_EXITNOW -1
#define IPSEC_LOADER_LOADNOW 1
/*
* NOTE: This function is entered w/o holding any STREAMS perimeters.
*/
static void
ipsec_loader(void *arg)
{
callb_cpr_t cprinfo;
boolean_t ipsec_failure = B_FALSE;
ipsec_stack_t *ipss = (ipsec_stack_t *)arg;
CALLB_CPR_INIT(&cprinfo, &ipss->ipsec_loader_lock, callb_generic_cpr,
"ipsec_loader");
mutex_enter(&ipss->ipsec_loader_lock);
for (;;) {
/*
* Wait for someone to tell me to continue.
*/
while (ipss->ipsec_loader_sig == IPSEC_LOADER_WAIT) {
CALLB_CPR_SAFE_BEGIN(&cprinfo);
cv_wait(&ipss->ipsec_loader_sig_cv,
&ipss->ipsec_loader_lock);
CALLB_CPR_SAFE_END(&cprinfo, &ipss->ipsec_loader_lock);
}
/* IPSEC_LOADER_EXITNOW implies signal by _fini(). */
if (ipss->ipsec_loader_sig == IPSEC_LOADER_EXITNOW) {
/*
* Let user patch ipsec_loader_tid to
* 0 to try again.
*/
ipss->ipsec_loader_state = IPSEC_LOADER_FAILED;
ipss->ipsec_loader_sig = IPSEC_LOADER_WAIT;
/* ipsec_loader_lock is held at this point! */
ASSERT(MUTEX_HELD(&ipss->ipsec_loader_lock));
CALLB_CPR_EXIT(&cprinfo);
ASSERT(!MUTEX_HELD(&ipss->ipsec_loader_lock));
thread_exit();
}
mutex_exit(&ipss->ipsec_loader_lock);
/*
* Load IPsec, which is done by modloading keysock and calling
* keysock_plumb_ipsec().
*/
/* Pardon my hardcoding... */
if (modload("drv", "keysock") == -1) {
cmn_err(CE_WARN, "IP: Cannot load keysock.");
/*
* Only this function can set ipsec_failure. If the
* damage can be repaired, use adb to set this to
* B_FALSE and try again.
*/
ipsec_failure = B_TRUE;
} else if (keysock_plumb_ipsec(ipss->ipsec_netstack) != 0) {
cmn_err(CE_WARN, "IP: Cannot plumb IPsec.");
/*
* Only this function can set ipsec_failure. If the
* damage can be repaired, use adb to set this to
* B_FALSE and try again.
*/
ipsec_failure = B_TRUE;
} else {
ipsec_failure = B_FALSE;
}
mutex_enter(&ipss->ipsec_loader_lock);
if (ipsec_failure) {
if (ipss->ipsec_loader_sig == IPSEC_LOADER_LOADNOW)
ipss->ipsec_loader_sig = IPSEC_LOADER_WAIT;
ipss->ipsec_loader_state = IPSEC_LOADER_FAILED;
} else {
ipss->ipsec_loader_state = IPSEC_LOADER_SUCCEEDED;
}
mutex_exit(&ipss->ipsec_loader_lock);
ip_ipsec_load_complete(ipss);
mutex_enter(&ipss->ipsec_loader_lock);
if (!ipsec_failure) {
CALLB_CPR_EXIT(&cprinfo);
ASSERT(!MUTEX_HELD(&ipss->ipsec_loader_lock));
ipsec_register_prov_update();
thread_exit();
}
}
}
/*
* Called from ip_ddi_init() to initialize ipsec loader thread.
*/
void
ipsec_loader_init(ipsec_stack_t *ipss)
{
mutex_init(&ipss->ipsec_loader_lock, NULL, MUTEX_DEFAULT, NULL);
cv_init(&ipss->ipsec_loader_sig_cv, NULL, CV_DEFAULT, NULL);
}
/*
* Called from ip_ddi_destroy() to take down ipsec loader thread.
*/
void
ipsec_loader_destroy(ipsec_stack_t *ipss)
{
kt_did_t tid;
mutex_enter(&ipss->ipsec_loader_lock);
tid = ipss->ipsec_loader_tid;
if (tid != 0) {
ipss->ipsec_loader_sig = IPSEC_LOADER_EXITNOW;
cv_signal(&ipss->ipsec_loader_sig_cv);
ipss->ipsec_loader_tid = 0;
}
mutex_exit(&ipss->ipsec_loader_lock);
/*
* Wait for ipsec_loader() to finish before we destroy
* cvs and mutexes.
*/
if (tid != 0)
thread_join(tid);
mutex_destroy(&ipss->ipsec_loader_lock);
cv_destroy(&ipss->ipsec_loader_sig_cv);
}
void
ipsec_loader_start(ipsec_stack_t *ipss)
{
kthread_t *tp;
mutex_enter(&ipss->ipsec_loader_lock);
if (ipss->ipsec_loader_tid == 0) {
tp = thread_create(NULL, 0, ipsec_loader, ipss, 0, &p0,
TS_RUN, MAXCLSYSPRI);
ipss->ipsec_loader_tid = tp->t_did;
}
/* Else we lost the race, oh well. */
mutex_exit(&ipss->ipsec_loader_lock);
}
void
ipsec_loader_loadnow(ipsec_stack_t *ipss)
{
/*
* It is possible that an algorithm update message was
* received before IPsec is loaded. Such messages are
* saved in spdsock for later processing. Since IPsec
* loading can be initiated by interfaces different
* than spdsock, we must trigger the processing of
* update messages from the ipsec loader.
*/
spdsock_update_pending_algs(ipss->ipsec_netstack);
mutex_enter(&ipss->ipsec_loader_lock);
if ((ipss->ipsec_loader_state == IPSEC_LOADER_WAIT) &&
(ipss->ipsec_loader_sig == IPSEC_LOADER_WAIT)) {
ipss->ipsec_loader_sig = IPSEC_LOADER_LOADNOW;
cv_signal(&ipss->ipsec_loader_sig_cv);
}
mutex_exit(&ipss->ipsec_loader_lock);
}
/*
* Dummy callback routine (placeholder) to avoid keysock plumbing
* races. Used in conjunction with qtimeout() and qwait() to wait
* until ipsec has loaded -- the qwait() in ipsec_loader_loadwait will
* wake up once this routine returns.
*/
/* ARGSUSED */
static void
loader_nop(void *ignoreme)
{
}
/*
* Called from keysock driver open to delay until ipsec is done loading.
* Returns B_TRUE if it worked, B_FALSE if it didn't.
*/
boolean_t
ipsec_loader_wait(queue_t *q, ipsec_stack_t *ipss)
{
/*
* 30ms delay per loop is arbitrary; it takes ~300ms to
* load and plumb ipsec on an ultra-1.
*/
while (ipss->ipsec_loader_state == IPSEC_LOADER_WAIT) {
(void) qtimeout(q, loader_nop, 0, drv_usectohz(30000));
qwait(q);
}
return (ipss->ipsec_loader_state == IPSEC_LOADER_SUCCEEDED);
}
/*
* Just check to see if IPsec is loaded (or not).
*/
boolean_t
ipsec_loaded(ipsec_stack_t *ipss)
{
return (ipss->ipsec_loader_state == IPSEC_LOADER_SUCCEEDED);
}
/*
* Check to see if IPsec loading failed.
*/
boolean_t
ipsec_failed(ipsec_stack_t *ipss)
{
return (ipss->ipsec_loader_state == IPSEC_LOADER_FAILED);
}
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