e2adc47dbb
are used by NFSv4.1 for callbacks. A backchannel is a connection established by the client, but used for RPCs done by the server on the client (callbacks). As a result, this patch mixes some client side calls in the server side and vice versa. Some definitions in the .c files were extracted out into a file called krpc.h, so that they could be included in multiple .c files. This code has been in projects/nfsv4.1-client for some time. Although no one has given it a formal review, I believe kib@ has taken a look at it.
938 lines
22 KiB
C
938 lines
22 KiB
C
/* $NetBSD: svc_vc.c,v 1.7 2000/08/03 00:01:53 fvdl Exp $ */
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|
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/*
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* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
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* unrestricted use provided that this legend is included on all tape
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* media and as a part of the software program in whole or part. Users
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* may copy or modify Sun RPC without charge, but are not authorized
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* to license or distribute it to anyone else except as part of a product or
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* program developed by the user.
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*
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* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
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* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
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*
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* Sun RPC is provided with no support and without any obligation on the
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* part of Sun Microsystems, Inc. to assist in its use, correction,
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* modification or enhancement.
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*
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* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
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* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
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* OR ANY PART THEREOF.
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*
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* In no event will Sun Microsystems, Inc. be liable for any lost revenue
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* or profits or other special, indirect and consequential damages, even if
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* Sun has been advised of the possibility of such damages.
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*
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* Sun Microsystems, Inc.
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* 2550 Garcia Avenue
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* Mountain View, California 94043
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static char *sccsid2 = "@(#)svc_tcp.c 1.21 87/08/11 Copyr 1984 Sun Micro";
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static char *sccsid = "@(#)svc_tcp.c 2.2 88/08/01 4.0 RPCSRC";
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* svc_vc.c, Server side for Connection Oriented based RPC.
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*
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* Actually implements two flavors of transporter -
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* a tcp rendezvouser (a listner and connection establisher)
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* and a record/tcp stream.
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*/
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#include <sys/param.h>
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#include <sys/lock.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/mutex.h>
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#include <sys/proc.h>
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#include <sys/protosw.h>
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#include <sys/queue.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/sx.h>
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#include <sys/systm.h>
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#include <sys/uio.h>
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#include <net/vnet.h>
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#include <netinet/tcp.h>
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#include <rpc/rpc.h>
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#include <rpc/krpc.h>
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#include <rpc/rpc_com.h>
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#include <security/mac/mac_framework.h>
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static bool_t svc_vc_rendezvous_recv(SVCXPRT *, struct rpc_msg *,
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struct sockaddr **, struct mbuf **);
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static enum xprt_stat svc_vc_rendezvous_stat(SVCXPRT *);
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static void svc_vc_rendezvous_destroy(SVCXPRT *);
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static bool_t svc_vc_null(void);
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static void svc_vc_destroy(SVCXPRT *);
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static enum xprt_stat svc_vc_stat(SVCXPRT *);
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static bool_t svc_vc_recv(SVCXPRT *, struct rpc_msg *,
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struct sockaddr **, struct mbuf **);
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static bool_t svc_vc_reply(SVCXPRT *, struct rpc_msg *,
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struct sockaddr *, struct mbuf *);
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static bool_t svc_vc_control(SVCXPRT *xprt, const u_int rq, void *in);
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static bool_t svc_vc_rendezvous_control (SVCXPRT *xprt, const u_int rq,
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void *in);
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static void svc_vc_backchannel_destroy(SVCXPRT *);
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static enum xprt_stat svc_vc_backchannel_stat(SVCXPRT *);
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static bool_t svc_vc_backchannel_recv(SVCXPRT *, struct rpc_msg *,
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struct sockaddr **, struct mbuf **);
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static bool_t svc_vc_backchannel_reply(SVCXPRT *, struct rpc_msg *,
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struct sockaddr *, struct mbuf *);
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static bool_t svc_vc_backchannel_control(SVCXPRT *xprt, const u_int rq,
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void *in);
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static SVCXPRT *svc_vc_create_conn(SVCPOOL *pool, struct socket *so,
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struct sockaddr *raddr);
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static int svc_vc_accept(struct socket *head, struct socket **sop);
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static int svc_vc_soupcall(struct socket *so, void *arg, int waitflag);
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static struct xp_ops svc_vc_rendezvous_ops = {
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.xp_recv = svc_vc_rendezvous_recv,
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.xp_stat = svc_vc_rendezvous_stat,
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.xp_reply = (bool_t (*)(SVCXPRT *, struct rpc_msg *,
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struct sockaddr *, struct mbuf *))svc_vc_null,
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.xp_destroy = svc_vc_rendezvous_destroy,
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.xp_control = svc_vc_rendezvous_control
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};
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static struct xp_ops svc_vc_ops = {
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.xp_recv = svc_vc_recv,
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.xp_stat = svc_vc_stat,
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.xp_reply = svc_vc_reply,
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.xp_destroy = svc_vc_destroy,
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.xp_control = svc_vc_control
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};
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static struct xp_ops svc_vc_backchannel_ops = {
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.xp_recv = svc_vc_backchannel_recv,
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.xp_stat = svc_vc_backchannel_stat,
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.xp_reply = svc_vc_backchannel_reply,
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.xp_destroy = svc_vc_backchannel_destroy,
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.xp_control = svc_vc_backchannel_control
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};
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/*
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* Usage:
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* xprt = svc_vc_create(sock, send_buf_size, recv_buf_size);
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*
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* Creates, registers, and returns a (rpc) tcp based transporter.
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* Once *xprt is initialized, it is registered as a transporter
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* see (svc.h, xprt_register). This routine returns
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* a NULL if a problem occurred.
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*
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* The filedescriptor passed in is expected to refer to a bound, but
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* not yet connected socket.
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*
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* Since streams do buffered io similar to stdio, the caller can specify
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* how big the send and receive buffers are via the second and third parms;
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* 0 => use the system default.
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*/
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SVCXPRT *
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svc_vc_create(SVCPOOL *pool, struct socket *so, size_t sendsize,
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size_t recvsize)
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{
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SVCXPRT *xprt;
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struct sockaddr* sa;
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int error;
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if (so->so_state & SS_ISCONNECTED) {
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error = so->so_proto->pr_usrreqs->pru_peeraddr(so, &sa);
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if (error)
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return (NULL);
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xprt = svc_vc_create_conn(pool, so, sa);
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free(sa, M_SONAME);
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return (xprt);
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}
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xprt = svc_xprt_alloc();
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sx_init(&xprt->xp_lock, "xprt->xp_lock");
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xprt->xp_pool = pool;
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xprt->xp_socket = so;
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xprt->xp_p1 = NULL;
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xprt->xp_p2 = NULL;
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xprt->xp_ops = &svc_vc_rendezvous_ops;
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error = so->so_proto->pr_usrreqs->pru_sockaddr(so, &sa);
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if (error) {
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goto cleanup_svc_vc_create;
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}
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memcpy(&xprt->xp_ltaddr, sa, sa->sa_len);
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free(sa, M_SONAME);
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xprt_register(xprt);
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solisten(so, SOMAXCONN, curthread);
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SOCKBUF_LOCK(&so->so_rcv);
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xprt->xp_upcallset = 1;
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soupcall_set(so, SO_RCV, svc_vc_soupcall, xprt);
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SOCKBUF_UNLOCK(&so->so_rcv);
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return (xprt);
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cleanup_svc_vc_create:
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if (xprt)
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svc_xprt_free(xprt);
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return (NULL);
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}
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/*
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* Create a new transport for a socket optained via soaccept().
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*/
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SVCXPRT *
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svc_vc_create_conn(SVCPOOL *pool, struct socket *so, struct sockaddr *raddr)
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{
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SVCXPRT *xprt = NULL;
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struct cf_conn *cd = NULL;
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struct sockaddr* sa = NULL;
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struct sockopt opt;
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int one = 1;
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int error;
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bzero(&opt, sizeof(struct sockopt));
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opt.sopt_dir = SOPT_SET;
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opt.sopt_level = SOL_SOCKET;
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opt.sopt_name = SO_KEEPALIVE;
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opt.sopt_val = &one;
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opt.sopt_valsize = sizeof(one);
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error = sosetopt(so, &opt);
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if (error) {
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return (NULL);
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}
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if (so->so_proto->pr_protocol == IPPROTO_TCP) {
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bzero(&opt, sizeof(struct sockopt));
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opt.sopt_dir = SOPT_SET;
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opt.sopt_level = IPPROTO_TCP;
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opt.sopt_name = TCP_NODELAY;
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opt.sopt_val = &one;
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opt.sopt_valsize = sizeof(one);
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error = sosetopt(so, &opt);
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if (error) {
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return (NULL);
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}
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}
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cd = mem_alloc(sizeof(*cd));
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cd->strm_stat = XPRT_IDLE;
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xprt = svc_xprt_alloc();
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sx_init(&xprt->xp_lock, "xprt->xp_lock");
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xprt->xp_pool = pool;
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xprt->xp_socket = so;
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xprt->xp_p1 = cd;
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xprt->xp_p2 = NULL;
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xprt->xp_ops = &svc_vc_ops;
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/*
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* See http://www.connectathon.org/talks96/nfstcp.pdf - client
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* has a 5 minute timer, server has a 6 minute timer.
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*/
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xprt->xp_idletimeout = 6 * 60;
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memcpy(&xprt->xp_rtaddr, raddr, raddr->sa_len);
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error = so->so_proto->pr_usrreqs->pru_sockaddr(so, &sa);
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if (error)
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goto cleanup_svc_vc_create;
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memcpy(&xprt->xp_ltaddr, sa, sa->sa_len);
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free(sa, M_SONAME);
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xprt_register(xprt);
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SOCKBUF_LOCK(&so->so_rcv);
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xprt->xp_upcallset = 1;
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soupcall_set(so, SO_RCV, svc_vc_soupcall, xprt);
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SOCKBUF_UNLOCK(&so->so_rcv);
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/*
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* Throw the transport into the active list in case it already
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* has some data buffered.
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*/
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sx_xlock(&xprt->xp_lock);
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xprt_active(xprt);
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sx_xunlock(&xprt->xp_lock);
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return (xprt);
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cleanup_svc_vc_create:
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if (xprt) {
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mem_free(xprt, sizeof(*xprt));
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}
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if (cd)
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mem_free(cd, sizeof(*cd));
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return (NULL);
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}
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|
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/*
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* Create a new transport for a backchannel on a clnt_vc socket.
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*/
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SVCXPRT *
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svc_vc_create_backchannel(SVCPOOL *pool)
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{
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SVCXPRT *xprt = NULL;
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struct cf_conn *cd = NULL;
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cd = mem_alloc(sizeof(*cd));
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cd->strm_stat = XPRT_IDLE;
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|
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xprt = svc_xprt_alloc();
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sx_init(&xprt->xp_lock, "xprt->xp_lock");
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xprt->xp_pool = pool;
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xprt->xp_socket = NULL;
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xprt->xp_p1 = cd;
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xprt->xp_p2 = NULL;
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xprt->xp_ops = &svc_vc_backchannel_ops;
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return (xprt);
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}
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|
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/*
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* This does all of the accept except the final call to soaccept. The
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* caller will call soaccept after dropping its locks (soaccept may
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* call malloc).
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*/
|
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int
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svc_vc_accept(struct socket *head, struct socket **sop)
|
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{
|
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int error = 0;
|
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struct socket *so;
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|
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if ((head->so_options & SO_ACCEPTCONN) == 0) {
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error = EINVAL;
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goto done;
|
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}
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#ifdef MAC
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error = mac_socket_check_accept(curthread->td_ucred, head);
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if (error != 0)
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goto done;
|
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#endif
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ACCEPT_LOCK();
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if (TAILQ_EMPTY(&head->so_comp)) {
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ACCEPT_UNLOCK();
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error = EWOULDBLOCK;
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goto done;
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}
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so = TAILQ_FIRST(&head->so_comp);
|
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KASSERT(!(so->so_qstate & SQ_INCOMP), ("svc_vc_accept: so SQ_INCOMP"));
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KASSERT(so->so_qstate & SQ_COMP, ("svc_vc_accept: so not SQ_COMP"));
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|
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/*
|
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* Before changing the flags on the socket, we have to bump the
|
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* reference count. Otherwise, if the protocol calls sofree(),
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* the socket will be released due to a zero refcount.
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* XXX might not need soref() since this is simpler than kern_accept.
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*/
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SOCK_LOCK(so); /* soref() and so_state update */
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soref(so); /* file descriptor reference */
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|
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TAILQ_REMOVE(&head->so_comp, so, so_list);
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head->so_qlen--;
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so->so_state |= (head->so_state & SS_NBIO);
|
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so->so_qstate &= ~SQ_COMP;
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so->so_head = NULL;
|
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|
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SOCK_UNLOCK(so);
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ACCEPT_UNLOCK();
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|
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*sop = so;
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|
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/* connection has been removed from the listen queue */
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KNOTE_UNLOCKED(&head->so_rcv.sb_sel.si_note, 0);
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done:
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|
return (error);
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}
|
|
|
|
/*ARGSUSED*/
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static bool_t
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svc_vc_rendezvous_recv(SVCXPRT *xprt, struct rpc_msg *msg,
|
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struct sockaddr **addrp, struct mbuf **mp)
|
|
{
|
|
struct socket *so = NULL;
|
|
struct sockaddr *sa = NULL;
|
|
int error;
|
|
SVCXPRT *new_xprt;
|
|
|
|
/*
|
|
* The socket upcall calls xprt_active() which will eventually
|
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* cause the server to call us here. We attempt to accept a
|
|
* connection from the socket and turn it into a new
|
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* transport. If the accept fails, we have drained all pending
|
|
* connections so we call xprt_inactive().
|
|
*/
|
|
sx_xlock(&xprt->xp_lock);
|
|
|
|
error = svc_vc_accept(xprt->xp_socket, &so);
|
|
|
|
if (error == EWOULDBLOCK) {
|
|
/*
|
|
* We must re-test for new connections after taking
|
|
* the lock to protect us in the case where a new
|
|
* connection arrives after our call to accept fails
|
|
* with EWOULDBLOCK. The pool lock protects us from
|
|
* racing the upcall after our TAILQ_EMPTY() call
|
|
* returns false.
|
|
*/
|
|
ACCEPT_LOCK();
|
|
mtx_lock(&xprt->xp_pool->sp_lock);
|
|
if (TAILQ_EMPTY(&xprt->xp_socket->so_comp))
|
|
xprt_inactive_locked(xprt);
|
|
mtx_unlock(&xprt->xp_pool->sp_lock);
|
|
ACCEPT_UNLOCK();
|
|
sx_xunlock(&xprt->xp_lock);
|
|
return (FALSE);
|
|
}
|
|
|
|
if (error) {
|
|
SOCKBUF_LOCK(&xprt->xp_socket->so_rcv);
|
|
if (xprt->xp_upcallset) {
|
|
xprt->xp_upcallset = 0;
|
|
soupcall_clear(xprt->xp_socket, SO_RCV);
|
|
}
|
|
SOCKBUF_UNLOCK(&xprt->xp_socket->so_rcv);
|
|
xprt_inactive(xprt);
|
|
sx_xunlock(&xprt->xp_lock);
|
|
return (FALSE);
|
|
}
|
|
|
|
sx_xunlock(&xprt->xp_lock);
|
|
|
|
sa = 0;
|
|
error = soaccept(so, &sa);
|
|
|
|
if (error) {
|
|
/*
|
|
* XXX not sure if I need to call sofree or soclose here.
|
|
*/
|
|
if (sa)
|
|
free(sa, M_SONAME);
|
|
return (FALSE);
|
|
}
|
|
|
|
/*
|
|
* svc_vc_create_conn will call xprt_register - we don't need
|
|
* to do anything with the new connection except derefence it.
|
|
*/
|
|
new_xprt = svc_vc_create_conn(xprt->xp_pool, so, sa);
|
|
if (!new_xprt) {
|
|
soclose(so);
|
|
} else {
|
|
SVC_RELEASE(new_xprt);
|
|
}
|
|
|
|
free(sa, M_SONAME);
|
|
|
|
return (FALSE); /* there is never an rpc msg to be processed */
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
static enum xprt_stat
|
|
svc_vc_rendezvous_stat(SVCXPRT *xprt)
|
|
{
|
|
|
|
return (XPRT_IDLE);
|
|
}
|
|
|
|
static void
|
|
svc_vc_destroy_common(SVCXPRT *xprt)
|
|
{
|
|
SOCKBUF_LOCK(&xprt->xp_socket->so_rcv);
|
|
if (xprt->xp_upcallset) {
|
|
xprt->xp_upcallset = 0;
|
|
soupcall_clear(xprt->xp_socket, SO_RCV);
|
|
}
|
|
SOCKBUF_UNLOCK(&xprt->xp_socket->so_rcv);
|
|
|
|
sx_destroy(&xprt->xp_lock);
|
|
if (xprt->xp_socket)
|
|
(void)soclose(xprt->xp_socket);
|
|
|
|
if (xprt->xp_netid)
|
|
(void) mem_free(xprt->xp_netid, strlen(xprt->xp_netid) + 1);
|
|
svc_xprt_free(xprt);
|
|
}
|
|
|
|
static void
|
|
svc_vc_rendezvous_destroy(SVCXPRT *xprt)
|
|
{
|
|
|
|
svc_vc_destroy_common(xprt);
|
|
}
|
|
|
|
static void
|
|
svc_vc_destroy(SVCXPRT *xprt)
|
|
{
|
|
struct cf_conn *cd = (struct cf_conn *)xprt->xp_p1;
|
|
|
|
svc_vc_destroy_common(xprt);
|
|
|
|
if (cd->mreq)
|
|
m_freem(cd->mreq);
|
|
if (cd->mpending)
|
|
m_freem(cd->mpending);
|
|
mem_free(cd, sizeof(*cd));
|
|
}
|
|
|
|
static void
|
|
svc_vc_backchannel_destroy(SVCXPRT *xprt)
|
|
{
|
|
struct cf_conn *cd = (struct cf_conn *)xprt->xp_p1;
|
|
struct mbuf *m, *m2;
|
|
|
|
svc_xprt_free(xprt);
|
|
m = cd->mreq;
|
|
while (m != NULL) {
|
|
m2 = m;
|
|
m = m->m_nextpkt;
|
|
m_freem(m2);
|
|
}
|
|
mem_free(cd, sizeof(*cd));
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
static bool_t
|
|
svc_vc_control(SVCXPRT *xprt, const u_int rq, void *in)
|
|
{
|
|
return (FALSE);
|
|
}
|
|
|
|
static bool_t
|
|
svc_vc_rendezvous_control(SVCXPRT *xprt, const u_int rq, void *in)
|
|
{
|
|
|
|
return (FALSE);
|
|
}
|
|
|
|
static bool_t
|
|
svc_vc_backchannel_control(SVCXPRT *xprt, const u_int rq, void *in)
|
|
{
|
|
|
|
return (FALSE);
|
|
}
|
|
|
|
static enum xprt_stat
|
|
svc_vc_stat(SVCXPRT *xprt)
|
|
{
|
|
struct cf_conn *cd;
|
|
struct mbuf *m;
|
|
size_t n;
|
|
|
|
cd = (struct cf_conn *)(xprt->xp_p1);
|
|
|
|
if (cd->strm_stat == XPRT_DIED)
|
|
return (XPRT_DIED);
|
|
|
|
/*
|
|
* Return XPRT_MOREREQS if we have buffered data and we are
|
|
* mid-record or if we have enough data for a record
|
|
* marker. Since this is only a hint, we read mpending and
|
|
* resid outside the lock. We do need to take the lock if we
|
|
* have to traverse the mbuf chain.
|
|
*/
|
|
if (cd->mpending) {
|
|
if (cd->resid)
|
|
return (XPRT_MOREREQS);
|
|
n = 0;
|
|
sx_xlock(&xprt->xp_lock);
|
|
m = cd->mpending;
|
|
while (m && n < sizeof(uint32_t)) {
|
|
n += m->m_len;
|
|
m = m->m_next;
|
|
}
|
|
sx_xunlock(&xprt->xp_lock);
|
|
if (n >= sizeof(uint32_t))
|
|
return (XPRT_MOREREQS);
|
|
}
|
|
|
|
if (soreadable(xprt->xp_socket))
|
|
return (XPRT_MOREREQS);
|
|
|
|
return (XPRT_IDLE);
|
|
}
|
|
|
|
static enum xprt_stat
|
|
svc_vc_backchannel_stat(SVCXPRT *xprt)
|
|
{
|
|
struct cf_conn *cd;
|
|
|
|
cd = (struct cf_conn *)(xprt->xp_p1);
|
|
|
|
if (cd->mreq != NULL)
|
|
return (XPRT_MOREREQS);
|
|
|
|
return (XPRT_IDLE);
|
|
}
|
|
|
|
static bool_t
|
|
svc_vc_recv(SVCXPRT *xprt, struct rpc_msg *msg,
|
|
struct sockaddr **addrp, struct mbuf **mp)
|
|
{
|
|
struct cf_conn *cd = (struct cf_conn *) xprt->xp_p1;
|
|
struct uio uio;
|
|
struct mbuf *m;
|
|
XDR xdrs;
|
|
int error, rcvflag;
|
|
|
|
/*
|
|
* Serialise access to the socket and our own record parsing
|
|
* state.
|
|
*/
|
|
sx_xlock(&xprt->xp_lock);
|
|
|
|
for (;;) {
|
|
/*
|
|
* If we have an mbuf chain in cd->mpending, try to parse a
|
|
* record from it, leaving the result in cd->mreq. If we don't
|
|
* have a complete record, leave the partial result in
|
|
* cd->mreq and try to read more from the socket.
|
|
*/
|
|
if (cd->mpending) {
|
|
/*
|
|
* If cd->resid is non-zero, we have part of the
|
|
* record already, otherwise we are expecting a record
|
|
* marker.
|
|
*/
|
|
if (!cd->resid) {
|
|
/*
|
|
* See if there is enough data buffered to
|
|
* make up a record marker. Make sure we can
|
|
* handle the case where the record marker is
|
|
* split across more than one mbuf.
|
|
*/
|
|
size_t n = 0;
|
|
uint32_t header;
|
|
|
|
m = cd->mpending;
|
|
while (n < sizeof(uint32_t) && m) {
|
|
n += m->m_len;
|
|
m = m->m_next;
|
|
}
|
|
if (n < sizeof(uint32_t))
|
|
goto readmore;
|
|
m_copydata(cd->mpending, 0, sizeof(header),
|
|
(char *)&header);
|
|
header = ntohl(header);
|
|
cd->eor = (header & 0x80000000) != 0;
|
|
cd->resid = header & 0x7fffffff;
|
|
m_adj(cd->mpending, sizeof(uint32_t));
|
|
}
|
|
|
|
/*
|
|
* Start pulling off mbufs from cd->mpending
|
|
* until we either have a complete record or
|
|
* we run out of data. We use m_split to pull
|
|
* data - it will pull as much as possible and
|
|
* split the last mbuf if necessary.
|
|
*/
|
|
while (cd->mpending && cd->resid) {
|
|
m = cd->mpending;
|
|
if (cd->mpending->m_next
|
|
|| cd->mpending->m_len > cd->resid)
|
|
cd->mpending = m_split(cd->mpending,
|
|
cd->resid, M_WAITOK);
|
|
else
|
|
cd->mpending = NULL;
|
|
if (cd->mreq)
|
|
m_last(cd->mreq)->m_next = m;
|
|
else
|
|
cd->mreq = m;
|
|
while (m) {
|
|
cd->resid -= m->m_len;
|
|
m = m->m_next;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* If cd->resid is zero now, we have managed to
|
|
* receive a record fragment from the stream. Check
|
|
* for the end-of-record mark to see if we need more.
|
|
*/
|
|
if (cd->resid == 0) {
|
|
if (!cd->eor)
|
|
continue;
|
|
|
|
/*
|
|
* Success - we have a complete record in
|
|
* cd->mreq.
|
|
*/
|
|
xdrmbuf_create(&xdrs, cd->mreq, XDR_DECODE);
|
|
cd->mreq = NULL;
|
|
sx_xunlock(&xprt->xp_lock);
|
|
|
|
if (! xdr_callmsg(&xdrs, msg)) {
|
|
XDR_DESTROY(&xdrs);
|
|
return (FALSE);
|
|
}
|
|
|
|
*addrp = NULL;
|
|
*mp = xdrmbuf_getall(&xdrs);
|
|
XDR_DESTROY(&xdrs);
|
|
|
|
return (TRUE);
|
|
}
|
|
}
|
|
|
|
readmore:
|
|
/*
|
|
* The socket upcall calls xprt_active() which will eventually
|
|
* cause the server to call us here. We attempt to
|
|
* read as much as possible from the socket and put
|
|
* the result in cd->mpending. If the read fails,
|
|
* we have drained both cd->mpending and the socket so
|
|
* we can call xprt_inactive().
|
|
*/
|
|
uio.uio_resid = 1000000000;
|
|
uio.uio_td = curthread;
|
|
m = NULL;
|
|
rcvflag = MSG_DONTWAIT;
|
|
error = soreceive(xprt->xp_socket, NULL, &uio, &m, NULL,
|
|
&rcvflag);
|
|
|
|
if (error == EWOULDBLOCK) {
|
|
/*
|
|
* We must re-test for readability after
|
|
* taking the lock to protect us in the case
|
|
* where a new packet arrives on the socket
|
|
* after our call to soreceive fails with
|
|
* EWOULDBLOCK. The pool lock protects us from
|
|
* racing the upcall after our soreadable()
|
|
* call returns false.
|
|
*/
|
|
mtx_lock(&xprt->xp_pool->sp_lock);
|
|
if (!soreadable(xprt->xp_socket))
|
|
xprt_inactive_locked(xprt);
|
|
mtx_unlock(&xprt->xp_pool->sp_lock);
|
|
sx_xunlock(&xprt->xp_lock);
|
|
return (FALSE);
|
|
}
|
|
|
|
if (error) {
|
|
SOCKBUF_LOCK(&xprt->xp_socket->so_rcv);
|
|
if (xprt->xp_upcallset) {
|
|
xprt->xp_upcallset = 0;
|
|
soupcall_clear(xprt->xp_socket, SO_RCV);
|
|
}
|
|
SOCKBUF_UNLOCK(&xprt->xp_socket->so_rcv);
|
|
xprt_inactive(xprt);
|
|
cd->strm_stat = XPRT_DIED;
|
|
sx_xunlock(&xprt->xp_lock);
|
|
return (FALSE);
|
|
}
|
|
|
|
if (!m) {
|
|
/*
|
|
* EOF - the other end has closed the socket.
|
|
*/
|
|
xprt_inactive(xprt);
|
|
cd->strm_stat = XPRT_DIED;
|
|
sx_xunlock(&xprt->xp_lock);
|
|
return (FALSE);
|
|
}
|
|
|
|
if (cd->mpending)
|
|
m_last(cd->mpending)->m_next = m;
|
|
else
|
|
cd->mpending = m;
|
|
}
|
|
}
|
|
|
|
static bool_t
|
|
svc_vc_backchannel_recv(SVCXPRT *xprt, struct rpc_msg *msg,
|
|
struct sockaddr **addrp, struct mbuf **mp)
|
|
{
|
|
struct cf_conn *cd = (struct cf_conn *) xprt->xp_p1;
|
|
struct ct_data *ct;
|
|
struct mbuf *m;
|
|
XDR xdrs;
|
|
|
|
sx_xlock(&xprt->xp_lock);
|
|
ct = (struct ct_data *)xprt->xp_p2;
|
|
if (ct == NULL) {
|
|
sx_xunlock(&xprt->xp_lock);
|
|
return (FALSE);
|
|
}
|
|
mtx_lock(&ct->ct_lock);
|
|
m = cd->mreq;
|
|
if (m == NULL) {
|
|
xprt_inactive(xprt);
|
|
mtx_unlock(&ct->ct_lock);
|
|
sx_xunlock(&xprt->xp_lock);
|
|
return (FALSE);
|
|
}
|
|
cd->mreq = m->m_nextpkt;
|
|
mtx_unlock(&ct->ct_lock);
|
|
sx_xunlock(&xprt->xp_lock);
|
|
|
|
xdrmbuf_create(&xdrs, m, XDR_DECODE);
|
|
if (! xdr_callmsg(&xdrs, msg)) {
|
|
XDR_DESTROY(&xdrs);
|
|
return (FALSE);
|
|
}
|
|
*addrp = NULL;
|
|
*mp = xdrmbuf_getall(&xdrs);
|
|
XDR_DESTROY(&xdrs);
|
|
return (TRUE);
|
|
}
|
|
|
|
static bool_t
|
|
svc_vc_reply(SVCXPRT *xprt, struct rpc_msg *msg,
|
|
struct sockaddr *addr, struct mbuf *m)
|
|
{
|
|
XDR xdrs;
|
|
struct mbuf *mrep;
|
|
bool_t stat = TRUE;
|
|
int error;
|
|
|
|
/*
|
|
* Leave space for record mark.
|
|
*/
|
|
MGETHDR(mrep, M_WAITOK, MT_DATA);
|
|
mrep->m_len = 0;
|
|
mrep->m_data += sizeof(uint32_t);
|
|
|
|
xdrmbuf_create(&xdrs, mrep, XDR_ENCODE);
|
|
|
|
if (msg->rm_reply.rp_stat == MSG_ACCEPTED &&
|
|
msg->rm_reply.rp_acpt.ar_stat == SUCCESS) {
|
|
if (!xdr_replymsg(&xdrs, msg))
|
|
stat = FALSE;
|
|
else
|
|
xdrmbuf_append(&xdrs, m);
|
|
} else {
|
|
stat = xdr_replymsg(&xdrs, msg);
|
|
}
|
|
|
|
if (stat) {
|
|
m_fixhdr(mrep);
|
|
|
|
/*
|
|
* Prepend a record marker containing the reply length.
|
|
*/
|
|
M_PREPEND(mrep, sizeof(uint32_t), M_WAITOK);
|
|
*mtod(mrep, uint32_t *) =
|
|
htonl(0x80000000 | (mrep->m_pkthdr.len
|
|
- sizeof(uint32_t)));
|
|
error = sosend(xprt->xp_socket, NULL, NULL, mrep, NULL,
|
|
0, curthread);
|
|
if (!error) {
|
|
stat = TRUE;
|
|
}
|
|
} else {
|
|
m_freem(mrep);
|
|
}
|
|
|
|
XDR_DESTROY(&xdrs);
|
|
xprt->xp_p2 = NULL;
|
|
|
|
return (stat);
|
|
}
|
|
|
|
static bool_t
|
|
svc_vc_backchannel_reply(SVCXPRT *xprt, struct rpc_msg *msg,
|
|
struct sockaddr *addr, struct mbuf *m)
|
|
{
|
|
struct ct_data *ct;
|
|
XDR xdrs;
|
|
struct mbuf *mrep;
|
|
bool_t stat = TRUE;
|
|
int error;
|
|
|
|
/*
|
|
* Leave space for record mark.
|
|
*/
|
|
MGETHDR(mrep, M_WAITOK, MT_DATA);
|
|
mrep->m_len = 0;
|
|
mrep->m_data += sizeof(uint32_t);
|
|
|
|
xdrmbuf_create(&xdrs, mrep, XDR_ENCODE);
|
|
|
|
if (msg->rm_reply.rp_stat == MSG_ACCEPTED &&
|
|
msg->rm_reply.rp_acpt.ar_stat == SUCCESS) {
|
|
if (!xdr_replymsg(&xdrs, msg))
|
|
stat = FALSE;
|
|
else
|
|
xdrmbuf_append(&xdrs, m);
|
|
} else {
|
|
stat = xdr_replymsg(&xdrs, msg);
|
|
}
|
|
|
|
if (stat) {
|
|
m_fixhdr(mrep);
|
|
|
|
/*
|
|
* Prepend a record marker containing the reply length.
|
|
*/
|
|
M_PREPEND(mrep, sizeof(uint32_t), M_WAITOK);
|
|
*mtod(mrep, uint32_t *) =
|
|
htonl(0x80000000 | (mrep->m_pkthdr.len
|
|
- sizeof(uint32_t)));
|
|
sx_xlock(&xprt->xp_lock);
|
|
ct = (struct ct_data *)xprt->xp_p2;
|
|
if (ct != NULL)
|
|
error = sosend(ct->ct_socket, NULL, NULL, mrep, NULL,
|
|
0, curthread);
|
|
else
|
|
error = EPIPE;
|
|
sx_xunlock(&xprt->xp_lock);
|
|
if (!error) {
|
|
stat = TRUE;
|
|
}
|
|
} else {
|
|
m_freem(mrep);
|
|
}
|
|
|
|
XDR_DESTROY(&xdrs);
|
|
|
|
return (stat);
|
|
}
|
|
|
|
static bool_t
|
|
svc_vc_null()
|
|
{
|
|
|
|
return (FALSE);
|
|
}
|
|
|
|
static int
|
|
svc_vc_soupcall(struct socket *so, void *arg, int waitflag)
|
|
{
|
|
SVCXPRT *xprt = (SVCXPRT *) arg;
|
|
|
|
xprt_active(xprt);
|
|
return (SU_OK);
|
|
}
|
|
|
|
#if 0
|
|
/*
|
|
* Get the effective UID of the sending process. Used by rpcbind, keyserv
|
|
* and rpc.yppasswdd on AF_LOCAL.
|
|
*/
|
|
int
|
|
__rpc_get_local_uid(SVCXPRT *transp, uid_t *uid) {
|
|
int sock, ret;
|
|
gid_t egid;
|
|
uid_t euid;
|
|
struct sockaddr *sa;
|
|
|
|
sock = transp->xp_fd;
|
|
sa = (struct sockaddr *)transp->xp_rtaddr;
|
|
if (sa->sa_family == AF_LOCAL) {
|
|
ret = getpeereid(sock, &euid, &egid);
|
|
if (ret == 0)
|
|
*uid = euid;
|
|
return (ret);
|
|
} else
|
|
return (-1);
|
|
}
|
|
#endif
|