75b8b3b25c
flexible process_fork, process_exec, and process_exit eventhandlers. This reduces code duplication and also means that I don't have to go duplicate the eventhandler locking three more times for each of at_fork, at_exec, and at_exit. Reviewed by: phk, jake, almost complete silence on arch@
140 lines
3.9 KiB
C
140 lines
3.9 KiB
C
/*
|
|
* Copyright (c) 1999, 2000, 2001 Boris Popov
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by Boris Popov.
|
|
* 4. Neither the name of the author nor the names of any co-contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/errno.h>
|
|
#include <sys/eventhandler.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/lock.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/sysctl.h>
|
|
#include <sys/time.h>
|
|
|
|
#include <netncp/ncp.h>
|
|
#include <netncp/ncp_conn.h>
|
|
#include <netncp/ncp_sock.h>
|
|
#include <netncp/ncp_subr.h>
|
|
#include <netncp/ncp_rq.h>
|
|
#include <netncp/ncp_ncp.h>
|
|
#include <netncp/nwerror.h>
|
|
|
|
int ncp_debuglevel = 0;
|
|
|
|
struct callout_handle ncp_timer_handle;
|
|
static eventhandler_tag ncp_exit_tag;
|
|
|
|
static void ncp_at_exit(void *arg, struct proc *p);
|
|
static void ncp_timer(void *arg);
|
|
|
|
/*
|
|
* duplicate string from user space. It should be very-very slow.
|
|
*/
|
|
char *
|
|
ncp_str_dup(char *s) {
|
|
char *p, bt;
|
|
int len = 0;
|
|
|
|
for (p = s;;p++) {
|
|
if (copyin(p, &bt, 1)) return NULL;
|
|
len++;
|
|
if (bt == 0) break;
|
|
}
|
|
MALLOC(p, char*, len, M_NCPDATA, M_WAITOK);
|
|
copyin(s, p, len);
|
|
return p;
|
|
}
|
|
|
|
|
|
void
|
|
ncp_at_exit(void *arg, struct proc *p)
|
|
{
|
|
struct ncp_conn *ncp, *nncp;
|
|
struct thread *td;
|
|
|
|
FOREACH_THREAD_IN_PROC(p, td) {
|
|
if (ncp_conn_putprochandles(td) == 0)
|
|
continue;
|
|
|
|
ncp_conn_locklist(LK_EXCLUSIVE, td);
|
|
for (ncp = SLIST_FIRST(&conn_list); ncp; ncp = nncp) {
|
|
nncp = SLIST_NEXT(ncp, nc_next);
|
|
if (ncp_conn_lock(ncp, td, td->td_ucred,
|
|
NCPM_READ | NCPM_EXECUTE | NCPM_WRITE))
|
|
continue;
|
|
if (ncp_conn_free(ncp) != 0)
|
|
ncp_conn_unlock(ncp, td);
|
|
}
|
|
ncp_conn_unlocklist(td);
|
|
}
|
|
}
|
|
|
|
int
|
|
ncp_init(void)
|
|
{
|
|
ncp_conn_init();
|
|
ncp_exit_tag = EVENTHANDLER_REGISTER(process_exit, ncp_at_exit, NULL,
|
|
EVENTHANDLER_PRI_ANY);
|
|
ncp_timer_handle = timeout(ncp_timer, NULL, NCP_TIMER_TICK);
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
ncp_done(void)
|
|
{
|
|
int error;
|
|
|
|
error = ncp_conn_destroy();
|
|
if (error)
|
|
return error;
|
|
untimeout(ncp_timer, NULL, ncp_timer_handle);
|
|
EVENTHANDLER_DEREGISTER(process_exit, ncp_exit_tag);
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* tick every second and check for watch dog packets and lost connections */
|
|
static void
|
|
ncp_timer(void *arg)
|
|
{
|
|
struct ncp_conn *conn;
|
|
|
|
if(ncp_conn_locklist(LK_SHARED | LK_NOWAIT, NULL) == 0) {
|
|
SLIST_FOREACH(conn, &conn_list, nc_next)
|
|
ncp_check_conn(conn);
|
|
ncp_conn_unlocklist(NULL);
|
|
}
|
|
ncp_timer_handle = timeout(ncp_timer, NULL, NCP_TIMER_TICK);
|
|
}
|