minix/lib/libc/rpc/svc_vc.c

804 lines
19 KiB
C
Raw Normal View History

/* $NetBSD: svc_vc.c,v 1.30 2013/03/11 20:19:29 tron Exp $ */
/*
* Copyright (c) 2010, Oracle America, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of the "Oracle America, Inc." nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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
* COPYRIGHT HOLDER 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.
*/
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
#if 0
static char *sccsid = "@(#)svc_tcp.c 1.21 87/08/11 Copyr 1984 Sun Micro";
static char *sccsid = "@(#)svc_tcp.c 2.2 88/08/01 4.0 RPCSRC";
#else
__RCSID("$NetBSD: svc_vc.c,v 1.30 2013/03/11 20:19:29 tron Exp $");
#endif
#endif
/*
* svc_vc.c, Server side for Connection Oriented based RPC.
*
* Actually implements two flavors of transporter -
* a tcp rendezvouser (a listner and connection establisher)
* and a record/tcp stream.
*/
#include "namespace.h"
#include "reentrant.h"
#include <sys/types.h>
#include <sys/param.h>
#include <sys/poll.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <sys/time.h>
#include <netinet/in.h>
#include <assert.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <rpc/rpc.h>
#include "svc_fdset.h"
#include "rpc_internal.h"
#ifdef __weak_alias
__weak_alias(svc_fd_create,_svc_fd_create)
__weak_alias(svc_vc_create,_svc_vc_create)
#endif
#ifdef _REENTRANT
extern rwlock_t svc_fd_lock;
#endif
static SVCXPRT *makefd_xprt(int, u_int, u_int);
static bool_t rendezvous_request(SVCXPRT *, struct rpc_msg *);
static enum xprt_stat rendezvous_stat(SVCXPRT *);
static void svc_vc_destroy(SVCXPRT *);
static void __svc_vc_dodestroy(SVCXPRT *);
static int read_vc(caddr_t, caddr_t, int);
static int write_vc(caddr_t, caddr_t, int);
static enum xprt_stat svc_vc_stat(SVCXPRT *);
static bool_t svc_vc_recv(SVCXPRT *, struct rpc_msg *);
static bool_t svc_vc_getargs(SVCXPRT *, xdrproc_t, caddr_t);
static bool_t svc_vc_freeargs(SVCXPRT *, xdrproc_t, caddr_t);
static bool_t svc_vc_reply(SVCXPRT *, struct rpc_msg *);
static void svc_vc_rendezvous_ops(SVCXPRT *);
static void svc_vc_ops(SVCXPRT *);
static bool_t svc_vc_control(SVCXPRT *, const u_int, void *);
static bool_t svc_vc_rendezvous_control(SVCXPRT *, const u_int, void *);
struct cf_rendezvous { /* kept in xprt->xp_p1 for rendezvouser */
u_int sendsize;
u_int recvsize;
int maxrec;
};
struct cf_conn { /* kept in xprt->xp_p1 for actual connection */
enum xprt_stat strm_stat;
u_int32_t x_id;
XDR xdrs;
char verf_body[MAX_AUTH_BYTES];
u_int sendsize;
u_int recvsize;
int maxrec;
bool_t nonblock;
struct timeval last_recv_time;
};
/*
* Usage:
* xprt = svc_vc_create(sock, send_buf_size, recv_buf_size);
*
* Creates, registers, and returns a (rpc) tcp based transporter.
* Once *xprt is initialized, it is registered as a transporter
* see (svc.h, xprt_register). This routine returns
* a NULL if a problem occurred.
*
* The filedescriptor passed in is expected to refer to a bound, but
* not yet connected socket.
*
* Since streams do buffered io similar to stdio, the caller can specify
* how big the send and receive buffers are via the second and third parms;
* 0 => use the system default.
*/
SVCXPRT *
svc_vc_create(int fd, u_int sendsize, u_int recvsize)
{
SVCXPRT *xprt;
struct cf_rendezvous *r = NULL;
struct __rpc_sockinfo si;
struct sockaddr_storage sslocal;
socklen_t slen;
int one = 1;
if (!__rpc_fd2sockinfo(fd, &si))
return NULL;
r = mem_alloc(sizeof(*r));
if (r == NULL) {
warn("%s: out of memory", __func__);
return NULL;
}
r->sendsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)sendsize);
r->recvsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)recvsize);
r->maxrec = __svc_maxrec;
xprt = mem_alloc(sizeof(SVCXPRT));
if (xprt == NULL) {
warn("%s: out of memory", __func__);
goto cleanup_svc_vc_create;
}
xprt->xp_tp = NULL;
xprt->xp_p1 = (caddr_t)(void *)r;
xprt->xp_p2 = NULL;
xprt->xp_p3 = NULL;
xprt->xp_verf = _null_auth;
svc_vc_rendezvous_ops(xprt);
xprt->xp_port = (u_short)-1; /* It is the rendezvouser */
xprt->xp_fd = fd;
slen = sizeof (struct sockaddr_storage);
if (getsockname(fd, (struct sockaddr *)(void *)&sslocal, &slen) < 0) {
warn("%s: could not retrieve local addr", __func__);
goto cleanup_svc_vc_create;
}
/*
* We want to be able to check credentials on local sockets.
*/
if (sslocal.ss_family == AF_LOCAL)
if (setsockopt(fd, 0, LOCAL_CREDS, &one, (socklen_t)sizeof one)
== -1)
goto cleanup_svc_vc_create;
xprt->xp_ltaddr.maxlen = xprt->xp_ltaddr.len = sslocal.ss_len;
xprt->xp_ltaddr.buf = mem_alloc((size_t)sslocal.ss_len);
if (xprt->xp_ltaddr.buf == NULL) {
warn("%s: out of memory", __func__);
goto cleanup_svc_vc_create;
}
memcpy(xprt->xp_ltaddr.buf, &sslocal, (size_t)sslocal.ss_len);
xprt->xp_rtaddr.maxlen = sizeof (struct sockaddr_storage);
if (!xprt_register(xprt))
goto cleanup_svc_vc_create;
return xprt;
cleanup_svc_vc_create:
if (xprt)
mem_free(xprt, sizeof(*xprt));
if (r != NULL)
mem_free(r, sizeof(*r));
return NULL;
}
/*
* Like svtcp_create(), except the routine takes any *open* UNIX file
* descriptor as its first input.
*/
SVCXPRT *
svc_fd_create(int fd, u_int sendsize, u_int recvsize)
{
struct sockaddr_storage ss;
socklen_t slen;
SVCXPRT *ret;
_DIAGASSERT(fd != -1);
ret = makefd_xprt(fd, sendsize, recvsize);
if (ret == NULL)
return NULL;
slen = sizeof (struct sockaddr_storage);
if (getsockname(fd, (struct sockaddr *)(void *)&ss, &slen) < 0) {
warn("%s: could not retrieve local addr", __func__);
goto freedata;
}
ret->xp_ltaddr.maxlen = ret->xp_ltaddr.len = ss.ss_len;
ret->xp_ltaddr.buf = mem_alloc((size_t)ss.ss_len);
if (ret->xp_ltaddr.buf == NULL) {
warn("%s: out of memory", __func__);
goto freedata;
}
memcpy(ret->xp_ltaddr.buf, &ss, (size_t)ss.ss_len);
slen = sizeof (struct sockaddr_storage);
if (getpeername(fd, (struct sockaddr *)(void *)&ss, &slen) < 0) {
warn("%s: could not retrieve remote addr", __func__);
goto freedata;
}
ret->xp_rtaddr.maxlen = ret->xp_rtaddr.len = ss.ss_len;
ret->xp_rtaddr.buf = mem_alloc((size_t)ss.ss_len);
if (ret->xp_rtaddr.buf == NULL) {
warn("%s: out of memory", __func__);
goto freedata;
}
memcpy(ret->xp_rtaddr.buf, &ss, (size_t)ss.ss_len);
#ifdef PORTMAP
if (ss.ss_family == AF_INET) {
ret->xp_raddr = *(struct sockaddr_in *)ret->xp_rtaddr.buf;
ret->xp_addrlen = sizeof (struct sockaddr_in);
}
#endif
return ret;
freedata:
if (ret->xp_ltaddr.buf != NULL)
mem_free(ret->xp_ltaddr.buf, rep->xp_ltaddr.maxlen);
return NULL;
}
static SVCXPRT *
makefd_xprt(int fd, u_int sendsize, u_int recvsize)
{
SVCXPRT *xprt;
struct cf_conn *cd;
const char *netid;
struct __rpc_sockinfo si;
_DIAGASSERT(fd != -1);
xprt = mem_alloc(sizeof(SVCXPRT));
if (xprt == NULL)
goto outofmem;
memset(xprt, 0, sizeof *xprt);
cd = mem_alloc(sizeof(struct cf_conn));
if (cd == NULL)
goto outofmem;
cd->strm_stat = XPRT_IDLE;
xdrrec_create(&(cd->xdrs), sendsize, recvsize,
(caddr_t)(void *)xprt, read_vc, write_vc);
xprt->xp_p1 = (caddr_t)(void *)cd;
xprt->xp_verf.oa_base = cd->verf_body;
svc_vc_ops(xprt); /* truely deals with calls */
xprt->xp_port = 0; /* this is a connection, not a rendezvouser */
xprt->xp_fd = fd;
if (__rpc_fd2sockinfo(fd, &si) && __rpc_sockinfo2netid(&si, &netid))
if ((xprt->xp_netid = strdup(netid)) == NULL)
goto outofmem;
if (!xprt_register(xprt))
goto out;
return xprt;
outofmem:
warn("svc_tcp: makefd_xprt");
out:
if (xprt)
mem_free(xprt, sizeof(SVCXPRT));
return NULL;
}
/*ARGSUSED*/
static bool_t
rendezvous_request(SVCXPRT *xprt, struct rpc_msg *msg)
{
int sock, flags;
struct cf_rendezvous *r;
struct cf_conn *cd;
struct sockaddr_storage addr;
socklen_t len;
struct __rpc_sockinfo si;
SVCXPRT *newxprt;
fd_set cleanfds;
_DIAGASSERT(xprt != NULL);
_DIAGASSERT(msg != NULL);
r = (struct cf_rendezvous *)xprt->xp_p1;
again:
len = sizeof addr;
if ((sock = accept(xprt->xp_fd, (struct sockaddr *)(void *)&addr,
&len)) < 0) {
if (errno == EINTR)
goto again;
/*
* Clean out the most idle file descriptor when we're
* running out.
*/
if (errno == EMFILE || errno == ENFILE) {
cleanfds = *get_fdset();
if (__svc_clean_idle(&cleanfds, 0, FALSE))
goto again;
}
return FALSE;
}
/*
* make a new transporter (re-uses xprt)
*/
newxprt = makefd_xprt(sock, r->sendsize, r->recvsize);
if (newxprt == NULL)
goto out;
newxprt->xp_rtaddr.buf = mem_alloc(len);
if (newxprt->xp_rtaddr.buf == NULL)
goto out;
memcpy(newxprt->xp_rtaddr.buf, &addr, len);
newxprt->xp_rtaddr.len = len;
#ifdef PORTMAP
if (addr.ss_family == AF_INET) {
newxprt->xp_raddr = *(struct sockaddr_in *)newxprt->xp_rtaddr.buf;
newxprt->xp_addrlen = sizeof (struct sockaddr_in);
}
#endif
if (__rpc_fd2sockinfo(sock, &si))
__rpc_setnodelay(sock, &si);
cd = (struct cf_conn *)newxprt->xp_p1;
cd->recvsize = r->recvsize;
cd->sendsize = r->sendsize;
cd->maxrec = r->maxrec;
if (cd->maxrec != 0) {
flags = fcntl(sock, F_GETFL, 0);
if (flags == -1)
goto out;
if (fcntl(sock, F_SETFL, flags | O_NONBLOCK) == -1)
goto out;
if (cd->recvsize > (u_int)cd->maxrec)
cd->recvsize = cd->maxrec;
cd->nonblock = TRUE;
__xdrrec_setnonblock(&cd->xdrs, cd->maxrec);
} else
cd->nonblock = FALSE;
(void)gettimeofday(&cd->last_recv_time, NULL);
return FALSE; /* there is never an rpc msg to be processed */
out:
(void)close(sock);
return FALSE; /* there was an error */
}
/*ARGSUSED*/
static enum xprt_stat
rendezvous_stat(SVCXPRT *xprt)
{
return XPRT_IDLE;
}
static void
svc_vc_destroy(SVCXPRT *xprt)
{
_DIAGASSERT(xprt != NULL);
xprt_unregister(xprt);
__svc_vc_dodestroy(xprt);
}
static void
__svc_vc_dodestroy(SVCXPRT *xprt)
{
struct cf_conn *cd;
struct cf_rendezvous *r;
cd = (struct cf_conn *)xprt->xp_p1;
if (xprt->xp_fd != RPC_ANYFD)
(void)close(xprt->xp_fd);
if (xprt->xp_port != 0) {
/* a rendezvouser socket */
r = (struct cf_rendezvous *)xprt->xp_p1;
mem_free(r, sizeof (struct cf_rendezvous));
xprt->xp_port = 0;
} else {
/* an actual connection socket */
XDR_DESTROY(&(cd->xdrs));
mem_free(cd, sizeof(struct cf_conn));
}
if (xprt->xp_rtaddr.buf)
mem_free(xprt->xp_rtaddr.buf, xprt->xp_rtaddr.maxlen);
if (xprt->xp_ltaddr.buf)
mem_free(xprt->xp_ltaddr.buf, xprt->xp_ltaddr.maxlen);
if (xprt->xp_tp)
free(xprt->xp_tp);
if (xprt->xp_netid)
free(xprt->xp_netid);
mem_free(xprt, sizeof(SVCXPRT));
}
/*ARGSUSED*/
static bool_t
svc_vc_control(SVCXPRT *xprt, const u_int rq, void *in)
{
return FALSE;
}
/*ARGSUSED*/
static bool_t
svc_vc_rendezvous_control(SVCXPRT *xprt, const u_int rq, void *in)
{
struct cf_rendezvous *cfp;
cfp = (struct cf_rendezvous *)xprt->xp_p1;
if (cfp == NULL)
return FALSE;
switch (rq) {
case SVCGET_CONNMAXREC:
*(int *)in = cfp->maxrec;
break;
case SVCSET_CONNMAXREC:
cfp->maxrec = *(int *)in;
break;
default:
return FALSE;
}
return TRUE;
}
/*
* reads data from the tcp connection.
* any error is fatal and the connection is closed.
* (And a read of zero bytes is a half closed stream => error.)
* All read operations timeout after 35 seconds. A timeout is
* fatal for the connection.
*/
static int
read_vc(caddr_t xprtp, caddr_t buf, int len)
{
SVCXPRT *xprt;
int sock;
struct pollfd pollfd;
struct sockaddr *sa;
struct msghdr msg;
struct cmsghdr *cmp;
void *crmsg = NULL;
struct sockcred *sc;
socklen_t crmsgsize;
struct cf_conn *cfp;
static const struct timespec ts = { 35, 0 };
xprt = (SVCXPRT *)(void *)xprtp;
_DIAGASSERT(xprt != NULL);
sock = xprt->xp_fd;
sa = (struct sockaddr *)xprt->xp_rtaddr.buf;
if (sa->sa_family == AF_LOCAL && xprt->xp_p2 == NULL) {
memset(&msg, 0, sizeof msg);
crmsgsize = CMSG_SPACE(SOCKCREDSIZE(NGROUPS));
crmsg = malloc(crmsgsize);
if (crmsg == NULL)
goto fatal_err;
memset(crmsg, 0, crmsgsize);
msg.msg_control = crmsg;
msg.msg_controllen = crmsgsize;
if (recvmsg(sock, &msg, 0) < 0)
goto fatal_err;
if (msg.msg_controllen == 0 ||
(msg.msg_flags & MSG_CTRUNC) != 0)
goto fatal_err;
cmp = CMSG_FIRSTHDR(&msg);
if (cmp->cmsg_level != SOL_SOCKET ||
cmp->cmsg_type != SCM_CREDS)
goto fatal_err;
sc = (struct sockcred *)(void *)CMSG_DATA(cmp);
xprt->xp_p2 = mem_alloc(SOCKCREDSIZE(sc->sc_ngroups));
if (xprt->xp_p2 == NULL)
goto fatal_err;
memcpy(xprt->xp_p2, sc, SOCKCREDSIZE(sc->sc_ngroups));
free(crmsg);
crmsg = NULL;
}
cfp = (struct cf_conn *)xprt->xp_p1;
if (cfp->nonblock) {
len = (int)read(sock, buf, (size_t)len);
if (len < 0) {
if (errno == EAGAIN)
len = 0;
else
goto fatal_err;
}
if (len != 0)
gettimeofday(&cfp->last_recv_time, NULL);
return len;
}
do {
pollfd.fd = sock;
pollfd.events = POLLIN;
switch (pollts(&pollfd, 1, &ts, NULL)) {
case -1:
if (errno == EINTR) {
continue;
}
/*FALLTHROUGH*/
case 0:
goto fatal_err;
default:
break;
}
} while ((pollfd.revents & POLLIN) == 0);
if ((len = (int)read(sock, buf, (size_t)len)) > 0) {
gettimeofday(&cfp->last_recv_time, NULL);
return len;
}
fatal_err:
if (crmsg != NULL)
free(crmsg);
((struct cf_conn *)(xprt->xp_p1))->strm_stat = XPRT_DIED;
return -1;
}
/*
* writes data to the tcp connection.
* Any error is fatal and the connection is closed.
*/
static int
write_vc(caddr_t xprtp, caddr_t buf, int len)
{
SVCXPRT *xprt;
int i, cnt;
struct cf_conn *cd;
struct timeval tv0, tv1;
xprt = (SVCXPRT *)(void *)xprtp;
_DIAGASSERT(xprt != NULL);
cd = (struct cf_conn *)xprt->xp_p1;
if (cd->nonblock)
gettimeofday(&tv0, NULL);
for (cnt = len; cnt > 0; cnt -= i, buf += i) {
if ((i = (int)write(xprt->xp_fd, buf, (size_t)cnt)) < 0) {
if (errno != EAGAIN || !cd->nonblock) {
cd->strm_stat = XPRT_DIED;
return -1;
}
if (cd->nonblock) {
/*
* For non-blocking connections, do not
* take more than 2 seconds writing the
* data out.
*
* XXX 2 is an arbitrary amount.
*/
gettimeofday(&tv1, NULL);
if (tv1.tv_sec - tv0.tv_sec >= 2) {
cd->strm_stat = XPRT_DIED;
return -1;
}
}
i = 0;
}
}
return len;
}
static enum xprt_stat
svc_vc_stat(SVCXPRT *xprt)
{
struct cf_conn *cd;
_DIAGASSERT(xprt != NULL);
cd = (struct cf_conn *)(xprt->xp_p1);
if (cd->strm_stat == XPRT_DIED)
return XPRT_DIED;
if (! xdrrec_eof(&(cd->xdrs)))
return XPRT_MOREREQS;
return XPRT_IDLE;
}
static bool_t
svc_vc_recv(SVCXPRT *xprt, struct rpc_msg *msg)
{
struct cf_conn *cd;
XDR *xdrs;
_DIAGASSERT(xprt != NULL);
_DIAGASSERT(msg != NULL);
cd = (struct cf_conn *)(xprt->xp_p1);
xdrs = &(cd->xdrs);
if (cd->nonblock) {
if (!__xdrrec_getrec(xdrs, &cd->strm_stat, TRUE))
return FALSE;
}
xdrs->x_op = XDR_DECODE;
(void)xdrrec_skiprecord(xdrs);
if (xdr_callmsg(xdrs, msg)) {
cd->x_id = msg->rm_xid;
return TRUE;
}
cd->strm_stat = XPRT_DIED;
return FALSE;
}
static bool_t
svc_vc_getargs(SVCXPRT *xprt, xdrproc_t xdr_args, caddr_t args_ptr)
{
_DIAGASSERT(xprt != NULL);
/* args_ptr may be NULL */
return (*xdr_args)(&(((struct cf_conn *)(xprt->xp_p1))->xdrs),
args_ptr);
}
static bool_t
svc_vc_freeargs(SVCXPRT *xprt, xdrproc_t xdr_args, caddr_t args_ptr)
{
XDR *xdrs;
_DIAGASSERT(xprt != NULL);
/* args_ptr may be NULL */
xdrs = &(((struct cf_conn *)(xprt->xp_p1))->xdrs);
xdrs->x_op = XDR_FREE;
return (*xdr_args)(xdrs, args_ptr);
}
static bool_t
svc_vc_reply(SVCXPRT *xprt, struct rpc_msg *msg)
{
struct cf_conn *cd;
XDR *xdrs;
bool_t rstat;
_DIAGASSERT(xprt != NULL);
_DIAGASSERT(msg != NULL);
cd = (struct cf_conn *)(xprt->xp_p1);
xdrs = &(cd->xdrs);
xdrs->x_op = XDR_ENCODE;
msg->rm_xid = cd->x_id;
rstat = xdr_replymsg(xdrs, msg);
(void)xdrrec_endofrecord(xdrs, TRUE);
return rstat;
}
static void
svc_vc_ops(SVCXPRT *xprt)
{
static struct xp_ops ops;
static struct xp_ops2 ops2;
#ifdef _REENTRANT
extern mutex_t ops_lock;
#endif
/* VARIABLES PROTECTED BY ops_lock: ops, ops2 */
mutex_lock(&ops_lock);
if (ops.xp_recv == NULL) {
ops.xp_recv = svc_vc_recv;
ops.xp_stat = svc_vc_stat;
ops.xp_getargs = svc_vc_getargs;
ops.xp_reply = svc_vc_reply;
ops.xp_freeargs = svc_vc_freeargs;
ops.xp_destroy = svc_vc_destroy;
ops2.xp_control = svc_vc_control;
}
xprt->xp_ops = &ops;
xprt->xp_ops2 = &ops2;
mutex_unlock(&ops_lock);
}
static void
svc_vc_rendezvous_ops(SVCXPRT *xprt)
{
static struct xp_ops ops;
static struct xp_ops2 ops2;
#ifdef _REENTRANT
extern mutex_t ops_lock;
#endif
mutex_lock(&ops_lock);
if (ops.xp_recv == NULL) {
ops.xp_recv = rendezvous_request;
ops.xp_stat = rendezvous_stat;
ops.xp_getargs =
(bool_t (*)(SVCXPRT *, xdrproc_t, caddr_t))abort;
ops.xp_reply =
(bool_t (*)(SVCXPRT *, struct rpc_msg *))abort;
ops.xp_freeargs =
(bool_t (*)(SVCXPRT *, xdrproc_t, caddr_t))abort;
ops.xp_destroy = svc_vc_destroy;
ops2.xp_control = svc_vc_rendezvous_control;
}
xprt->xp_ops = &ops;
xprt->xp_ops2 = &ops2;
mutex_unlock(&ops_lock);
}
/*
* Destroy xprts that have not have had any activity in 'timeout' seconds.
* If 'cleanblock' is true, blocking connections (the default) are also
* cleaned. If timeout is 0, the least active connection is picked.
*/
bool_t
__svc_clean_idle(fd_set *fds, int timeout, bool_t cleanblock)
{
int i, ncleaned;
SVCXPRT *xprt, *least_active;
struct timeval tv, tdiff, tmax;
struct cf_conn *cd;
gettimeofday(&tv, NULL);
tmax.tv_sec = tmax.tv_usec = 0;
least_active = NULL;
rwlock_wrlock(&svc_fd_lock);
for (i = ncleaned = 0; i <= svc_maxfd; i++) {
if (FD_ISSET(i, fds)) {
xprt = __svc_xports[i];
if (xprt == NULL || xprt->xp_ops == NULL ||
xprt->xp_ops->xp_recv != svc_vc_recv)
continue;
cd = (struct cf_conn *)xprt->xp_p1;
if (!cleanblock && !cd->nonblock)
continue;
if (timeout == 0) {
timersub(&tv, &cd->last_recv_time, &tdiff);
if (timercmp(&tdiff, &tmax, >)) {
tmax = tdiff;
least_active = xprt;
}
continue;
}
if (tv.tv_sec - cd->last_recv_time.tv_sec > timeout) {
__xprt_unregister_unlocked(xprt);
__svc_vc_dodestroy(xprt);
ncleaned++;
}
}
}
if (timeout == 0 && least_active != NULL) {
__xprt_unregister_unlocked(least_active);
__svc_vc_dodestroy(least_active);
ncleaned++;
}
rwlock_unlock(&svc_fd_lock);
return ncleaned > 0 ? TRUE : FALSE;
}