clnt_dg.c revision 195245
1177633Sdfr/* $NetBSD: clnt_dg.c,v 1.4 2000/07/14 08:40:41 fvdl Exp $ */ 2177633Sdfr 3177633Sdfr/* 4177633Sdfr * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 5177633Sdfr * unrestricted use provided that this legend is included on all tape 6177633Sdfr * media and as a part of the software program in whole or part. Users 7177633Sdfr * may copy or modify Sun RPC without charge, but are not authorized 8177633Sdfr * to license or distribute it to anyone else except as part of a product or 9177633Sdfr * program developed by the user. 10177633Sdfr * 11177633Sdfr * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 12177633Sdfr * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 13177633Sdfr * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 14177633Sdfr * 15177633Sdfr * Sun RPC is provided with no support and without any obligation on the 16177633Sdfr * part of Sun Microsystems, Inc. to assist in its use, correction, 17177633Sdfr * modification or enhancement. 18177633Sdfr * 19177633Sdfr * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 20177633Sdfr * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 21177633Sdfr * OR ANY PART THEREOF. 22177633Sdfr * 23177633Sdfr * In no event will Sun Microsystems, Inc. be liable for any lost revenue 24177633Sdfr * or profits or other special, indirect and consequential damages, even if 25177633Sdfr * Sun has been advised of the possibility of such damages. 26177633Sdfr * 27177633Sdfr * Sun Microsystems, Inc. 28177633Sdfr * 2550 Garcia Avenue 29177633Sdfr * Mountain View, California 94043 30177633Sdfr */ 31177633Sdfr/* 32177633Sdfr * Copyright (c) 1986-1991 by Sun Microsystems Inc. 33177633Sdfr */ 34177633Sdfr 35177633Sdfr#if defined(LIBC_SCCS) && !defined(lint) 36177633Sdfr#ident "@(#)clnt_dg.c 1.23 94/04/22 SMI" 37177633Sdfrstatic char sccsid[] = "@(#)clnt_dg.c 1.19 89/03/16 Copyr 1988 Sun Micro"; 38177633Sdfr#endif 39177633Sdfr#include <sys/cdefs.h> 40177633Sdfr__FBSDID("$FreeBSD: head/sys/rpc/clnt_dg.c 195245 2009-07-01 16:38:18Z rmacklem $"); 41177633Sdfr 42177633Sdfr/* 43177633Sdfr * Implements a connectionless client side RPC. 44177633Sdfr */ 45177633Sdfr 46177633Sdfr#include <sys/param.h> 47177633Sdfr#include <sys/systm.h> 48180025Sdfr#include <sys/kernel.h> 49177633Sdfr#include <sys/lock.h> 50177633Sdfr#include <sys/malloc.h> 51177633Sdfr#include <sys/mbuf.h> 52177633Sdfr#include <sys/mutex.h> 53177633Sdfr#include <sys/pcpu.h> 54177633Sdfr#include <sys/proc.h> 55177633Sdfr#include <sys/socket.h> 56177633Sdfr#include <sys/socketvar.h> 57177633Sdfr#include <sys/time.h> 58177633Sdfr#include <sys/uio.h> 59177633Sdfr 60177633Sdfr#include <rpc/rpc.h> 61177685Sdfr#include <rpc/rpc_com.h> 62177633Sdfr 63177633Sdfr 64177633Sdfr#ifdef _FREEFALL_CONFIG 65177633Sdfr/* 66177633Sdfr * Disable RPC exponential back-off for FreeBSD.org systems. 67177633Sdfr */ 68177633Sdfr#define RPC_MAX_BACKOFF 1 /* second */ 69177633Sdfr#else 70177633Sdfr#define RPC_MAX_BACKOFF 30 /* seconds */ 71177633Sdfr#endif 72177633Sdfr 73177633Sdfrstatic bool_t time_not_ok(struct timeval *); 74180025Sdfrstatic enum clnt_stat clnt_dg_call(CLIENT *, struct rpc_callextra *, 75184588Sdfr rpcproc_t, struct mbuf *, struct mbuf **, struct timeval); 76177633Sdfrstatic void clnt_dg_geterr(CLIENT *, struct rpc_err *); 77177633Sdfrstatic bool_t clnt_dg_freeres(CLIENT *, xdrproc_t, void *); 78177633Sdfrstatic void clnt_dg_abort(CLIENT *); 79177633Sdfrstatic bool_t clnt_dg_control(CLIENT *, u_int, void *); 80184588Sdfrstatic void clnt_dg_close(CLIENT *); 81177633Sdfrstatic void clnt_dg_destroy(CLIENT *); 82193272Sjhbstatic int clnt_dg_soupcall(struct socket *so, void *arg, int waitflag); 83177633Sdfr 84177633Sdfrstatic struct clnt_ops clnt_dg_ops = { 85177633Sdfr .cl_call = clnt_dg_call, 86177633Sdfr .cl_abort = clnt_dg_abort, 87177633Sdfr .cl_geterr = clnt_dg_geterr, 88177633Sdfr .cl_freeres = clnt_dg_freeres, 89184588Sdfr .cl_close = clnt_dg_close, 90177633Sdfr .cl_destroy = clnt_dg_destroy, 91177633Sdfr .cl_control = clnt_dg_control 92177633Sdfr}; 93177633Sdfr 94177633Sdfrstatic const char mem_err_clnt_dg[] = "clnt_dg_create: out of memory"; 95177633Sdfr 96177633Sdfr/* 97180025Sdfr * A pending RPC request which awaits a reply. Requests which have 98180025Sdfr * received their reply will have cr_xid set to zero and cr_mrep to 99180025Sdfr * the mbuf chain of the reply. 100177633Sdfr */ 101177633Sdfrstruct cu_request { 102177633Sdfr TAILQ_ENTRY(cu_request) cr_link; 103180025Sdfr CLIENT *cr_client; /* owner */ 104177633Sdfr uint32_t cr_xid; /* XID of request */ 105177633Sdfr struct mbuf *cr_mrep; /* reply received by upcall */ 106177633Sdfr int cr_error; /* any error from upcall */ 107184588Sdfr char cr_verf[MAX_AUTH_BYTES]; /* reply verf */ 108177633Sdfr}; 109177633Sdfr 110177633SdfrTAILQ_HEAD(cu_request_list, cu_request); 111177633Sdfr 112177633Sdfr#define MCALL_MSG_SIZE 24 113177633Sdfr 114177633Sdfr/* 115193272Sjhb * This structure is pointed to by the socket buffer's sb_upcallarg 116177633Sdfr * member. It is separate from the client private data to facilitate 117177633Sdfr * multiple clients sharing the same socket. The cs_lock mutex is used 118177633Sdfr * to protect all fields of this structure, the socket's receive 119177633Sdfr * buffer SOCKBUF_LOCK is used to ensure that exactly one of these 120177633Sdfr * structures is installed on the socket. 121177633Sdfr */ 122177633Sdfrstruct cu_socket { 123177633Sdfr struct mtx cs_lock; 124177633Sdfr int cs_refs; /* Count of clients */ 125177633Sdfr struct cu_request_list cs_pending; /* Requests awaiting replies */ 126193437Srmacklem int cs_upcallrefs; /* Refcnt of upcalls in prog.*/ 127177633Sdfr}; 128177633Sdfr 129193437Srmacklemstatic void clnt_dg_upcallsdone(struct socket *, struct cu_socket *); 130193437Srmacklem 131177633Sdfr/* 132177633Sdfr * Private data kept per client handle 133177633Sdfr */ 134177633Sdfrstruct cu_data { 135180025Sdfr int cu_threads; /* # threads in clnt_vc_call */ 136184588Sdfr bool_t cu_closing; /* TRUE if we are closing */ 137184588Sdfr bool_t cu_closed; /* TRUE if we are closed */ 138177633Sdfr struct socket *cu_socket; /* connection socket */ 139177633Sdfr bool_t cu_closeit; /* opened by library */ 140177633Sdfr struct sockaddr_storage cu_raddr; /* remote address */ 141177633Sdfr int cu_rlen; 142177633Sdfr struct timeval cu_wait; /* retransmit interval */ 143177633Sdfr struct timeval cu_total; /* total time for the call */ 144177633Sdfr struct rpc_err cu_error; 145177633Sdfr uint32_t cu_xid; 146177633Sdfr char cu_mcallc[MCALL_MSG_SIZE]; /* marshalled callmsg */ 147177633Sdfr size_t cu_mcalllen; 148177633Sdfr size_t cu_sendsz; /* send size */ 149177633Sdfr size_t cu_recvsz; /* recv size */ 150177633Sdfr int cu_async; 151177633Sdfr int cu_connect; /* Use connect(). */ 152177633Sdfr int cu_connected; /* Have done connect(). */ 153177633Sdfr const char *cu_waitchan; 154177633Sdfr int cu_waitflag; 155184588Sdfr int cu_cwnd; /* congestion window */ 156184588Sdfr int cu_sent; /* number of in-flight RPCs */ 157184588Sdfr bool_t cu_cwnd_wait; 158177633Sdfr}; 159177633Sdfr 160184588Sdfr#define CWNDSCALE 256 161184588Sdfr#define MAXCWND (32 * CWNDSCALE) 162184588Sdfr 163177633Sdfr/* 164177633Sdfr * Connection less client creation returns with client handle parameters. 165177633Sdfr * Default options are set, which the user can change using clnt_control(). 166177633Sdfr * fd should be open and bound. 167177633Sdfr * NB: The rpch->cl_auth is initialized to null authentication. 168177633Sdfr * Caller may wish to set this something more useful. 169177633Sdfr * 170177633Sdfr * sendsz and recvsz are the maximum allowable packet sizes that can be 171177633Sdfr * sent and received. Normally they are the same, but they can be 172177633Sdfr * changed to improve the program efficiency and buffer allocation. 173177633Sdfr * If they are 0, use the transport default. 174177633Sdfr * 175177633Sdfr * If svcaddr is NULL, returns NULL. 176177633Sdfr */ 177177633SdfrCLIENT * 178177633Sdfrclnt_dg_create( 179177633Sdfr struct socket *so, 180177633Sdfr struct sockaddr *svcaddr, /* servers address */ 181177633Sdfr rpcprog_t program, /* program number */ 182177633Sdfr rpcvers_t version, /* version number */ 183177633Sdfr size_t sendsz, /* buffer recv size */ 184177633Sdfr size_t recvsz) /* buffer send size */ 185177633Sdfr{ 186177633Sdfr CLIENT *cl = NULL; /* client handle */ 187177633Sdfr struct cu_data *cu = NULL; /* private data */ 188177633Sdfr struct cu_socket *cs = NULL; 189193272Sjhb struct sockbuf *sb; 190177633Sdfr struct timeval now; 191177633Sdfr struct rpc_msg call_msg; 192177633Sdfr struct __rpc_sockinfo si; 193177633Sdfr XDR xdrs; 194177633Sdfr 195177633Sdfr if (svcaddr == NULL) { 196177633Sdfr rpc_createerr.cf_stat = RPC_UNKNOWNADDR; 197177633Sdfr return (NULL); 198177633Sdfr } 199177633Sdfr 200177633Sdfr if (!__rpc_socket2sockinfo(so, &si)) { 201177633Sdfr rpc_createerr.cf_stat = RPC_TLIERROR; 202177633Sdfr rpc_createerr.cf_error.re_errno = 0; 203177633Sdfr return (NULL); 204177633Sdfr } 205177633Sdfr 206177633Sdfr /* 207177633Sdfr * Find the receive and the send size 208177633Sdfr */ 209177633Sdfr sendsz = __rpc_get_t_size(si.si_af, si.si_proto, (int)sendsz); 210177633Sdfr recvsz = __rpc_get_t_size(si.si_af, si.si_proto, (int)recvsz); 211177633Sdfr if ((sendsz == 0) || (recvsz == 0)) { 212177633Sdfr rpc_createerr.cf_stat = RPC_TLIERROR; /* XXX */ 213177633Sdfr rpc_createerr.cf_error.re_errno = 0; 214177633Sdfr return (NULL); 215177633Sdfr } 216177633Sdfr 217177633Sdfr cl = mem_alloc(sizeof (CLIENT)); 218177633Sdfr 219177633Sdfr /* 220177633Sdfr * Should be multiple of 4 for XDR. 221177633Sdfr */ 222177633Sdfr sendsz = ((sendsz + 3) / 4) * 4; 223177633Sdfr recvsz = ((recvsz + 3) / 4) * 4; 224177633Sdfr cu = mem_alloc(sizeof (*cu)); 225180025Sdfr cu->cu_threads = 0; 226180025Sdfr cu->cu_closing = FALSE; 227184588Sdfr cu->cu_closed = FALSE; 228177633Sdfr (void) memcpy(&cu->cu_raddr, svcaddr, (size_t)svcaddr->sa_len); 229177633Sdfr cu->cu_rlen = svcaddr->sa_len; 230177633Sdfr /* Other values can also be set through clnt_control() */ 231180025Sdfr cu->cu_wait.tv_sec = 3; /* heuristically chosen */ 232177633Sdfr cu->cu_wait.tv_usec = 0; 233177633Sdfr cu->cu_total.tv_sec = -1; 234177633Sdfr cu->cu_total.tv_usec = -1; 235177633Sdfr cu->cu_sendsz = sendsz; 236177633Sdfr cu->cu_recvsz = recvsz; 237177633Sdfr cu->cu_async = FALSE; 238177633Sdfr cu->cu_connect = FALSE; 239177633Sdfr cu->cu_connected = FALSE; 240177633Sdfr cu->cu_waitchan = "rpcrecv"; 241177633Sdfr cu->cu_waitflag = 0; 242184588Sdfr cu->cu_cwnd = MAXCWND / 2; 243184588Sdfr cu->cu_sent = 0; 244184588Sdfr cu->cu_cwnd_wait = FALSE; 245177633Sdfr (void) getmicrotime(&now); 246177633Sdfr cu->cu_xid = __RPC_GETXID(&now); 247177633Sdfr call_msg.rm_xid = cu->cu_xid; 248177633Sdfr call_msg.rm_call.cb_prog = program; 249177633Sdfr call_msg.rm_call.cb_vers = version; 250177633Sdfr xdrmem_create(&xdrs, cu->cu_mcallc, MCALL_MSG_SIZE, XDR_ENCODE); 251177633Sdfr if (! xdr_callhdr(&xdrs, &call_msg)) { 252177633Sdfr rpc_createerr.cf_stat = RPC_CANTENCODEARGS; /* XXX */ 253177633Sdfr rpc_createerr.cf_error.re_errno = 0; 254177633Sdfr goto err2; 255177633Sdfr } 256177633Sdfr cu->cu_mcalllen = XDR_GETPOS(&xdrs);; 257177633Sdfr 258177633Sdfr /* 259177633Sdfr * By default, closeit is always FALSE. It is users responsibility 260177633Sdfr * to do a close on it, else the user may use clnt_control 261177633Sdfr * to let clnt_destroy do it for him/her. 262177633Sdfr */ 263177633Sdfr cu->cu_closeit = FALSE; 264177633Sdfr cu->cu_socket = so; 265180025Sdfr soreserve(so, 256*1024, 256*1024); 266177633Sdfr 267193272Sjhb sb = &so->so_rcv; 268177633Sdfr SOCKBUF_LOCK(&so->so_rcv); 269177633Sdfrrecheck_socket: 270193272Sjhb if (sb->sb_upcall) { 271193272Sjhb if (sb->sb_upcall != clnt_dg_soupcall) { 272177633Sdfr SOCKBUF_UNLOCK(&so->so_rcv); 273177633Sdfr printf("clnt_dg_create(): socket already has an incompatible upcall\n"); 274177633Sdfr goto err2; 275177633Sdfr } 276193272Sjhb cs = (struct cu_socket *) sb->sb_upcallarg; 277177633Sdfr mtx_lock(&cs->cs_lock); 278177633Sdfr cs->cs_refs++; 279177633Sdfr mtx_unlock(&cs->cs_lock); 280177633Sdfr } else { 281177633Sdfr /* 282177633Sdfr * We are the first on this socket - allocate the 283177633Sdfr * structure and install it in the socket. 284177633Sdfr */ 285193272Sjhb SOCKBUF_UNLOCK(&so->so_rcv); 286177633Sdfr cs = mem_alloc(sizeof(*cs)); 287193272Sjhb SOCKBUF_LOCK(&so->so_rcv); 288193272Sjhb if (sb->sb_upcall) { 289177633Sdfr /* 290177633Sdfr * We have lost a race with some other client. 291177633Sdfr */ 292177633Sdfr mem_free(cs, sizeof(*cs)); 293177633Sdfr goto recheck_socket; 294177633Sdfr } 295177633Sdfr mtx_init(&cs->cs_lock, "cs->cs_lock", NULL, MTX_DEF); 296177633Sdfr cs->cs_refs = 1; 297193437Srmacklem cs->cs_upcallrefs = 0; 298177633Sdfr TAILQ_INIT(&cs->cs_pending); 299193272Sjhb soupcall_set(so, SO_RCV, clnt_dg_soupcall, cs); 300177633Sdfr } 301177633Sdfr SOCKBUF_UNLOCK(&so->so_rcv); 302177633Sdfr 303180025Sdfr cl->cl_refs = 1; 304177633Sdfr cl->cl_ops = &clnt_dg_ops; 305177633Sdfr cl->cl_private = (caddr_t)(void *)cu; 306177633Sdfr cl->cl_auth = authnone_create(); 307177633Sdfr cl->cl_tp = NULL; 308177633Sdfr cl->cl_netid = NULL; 309177633Sdfr return (cl); 310177633Sdfrerr2: 311177633Sdfr if (cl) { 312177633Sdfr mem_free(cl, sizeof (CLIENT)); 313177633Sdfr if (cu) 314177633Sdfr mem_free(cu, sizeof (*cu)); 315177633Sdfr } 316177633Sdfr return (NULL); 317177633Sdfr} 318177633Sdfr 319177633Sdfrstatic enum clnt_stat 320177633Sdfrclnt_dg_call( 321180025Sdfr CLIENT *cl, /* client handle */ 322180025Sdfr struct rpc_callextra *ext, /* call metadata */ 323177633Sdfr rpcproc_t proc, /* procedure number */ 324184588Sdfr struct mbuf *args, /* pointer to args */ 325184588Sdfr struct mbuf **resultsp, /* pointer to results */ 326177633Sdfr struct timeval utimeout) /* seconds to wait before giving up */ 327177633Sdfr{ 328177633Sdfr struct cu_data *cu = (struct cu_data *)cl->cl_private; 329193272Sjhb struct cu_socket *cs; 330184588Sdfr struct rpc_timers *rt; 331180025Sdfr AUTH *auth; 332184588Sdfr struct rpc_err *errp; 333184588Sdfr enum clnt_stat stat; 334177633Sdfr XDR xdrs; 335177633Sdfr struct rpc_msg reply_msg; 336177633Sdfr bool_t ok; 337180025Sdfr int retrans; /* number of re-transmits so far */ 338177633Sdfr int nrefreshes = 2; /* number of times to refresh cred */ 339180025Sdfr struct timeval *tvp; 340180025Sdfr int timeout; 341180025Sdfr int retransmit_time; 342184588Sdfr int next_sendtime, starttime, rtt, time_waited, tv = 0; 343177633Sdfr struct sockaddr *sa; 344177633Sdfr socklen_t salen; 345184588Sdfr uint32_t xid = 0; 346184588Sdfr struct mbuf *mreq = NULL, *results; 347180025Sdfr struct cu_request *cr; 348177633Sdfr int error; 349177633Sdfr 350193272Sjhb cs = cu->cu_socket->so_rcv.sb_upcallarg; 351180025Sdfr cr = malloc(sizeof(struct cu_request), M_RPC, M_WAITOK); 352180025Sdfr 353177633Sdfr mtx_lock(&cs->cs_lock); 354177633Sdfr 355184588Sdfr if (cu->cu_closing || cu->cu_closed) { 356180025Sdfr mtx_unlock(&cs->cs_lock); 357180025Sdfr free(cr, M_RPC); 358180025Sdfr return (RPC_CANTSEND); 359180025Sdfr } 360180025Sdfr cu->cu_threads++; 361177633Sdfr 362184588Sdfr if (ext) { 363180025Sdfr auth = ext->rc_auth; 364184588Sdfr errp = &ext->rc_err; 365184588Sdfr } else { 366180025Sdfr auth = cl->cl_auth; 367184588Sdfr errp = &cu->cu_error; 368184588Sdfr } 369180025Sdfr 370180025Sdfr cr->cr_client = cl; 371180025Sdfr cr->cr_mrep = NULL; 372180025Sdfr cr->cr_error = 0; 373180025Sdfr 374177633Sdfr if (cu->cu_total.tv_usec == -1) { 375180025Sdfr tvp = &utimeout; /* use supplied timeout */ 376177633Sdfr } else { 377180025Sdfr tvp = &cu->cu_total; /* use default timeout */ 378177633Sdfr } 379180025Sdfr if (tvp->tv_sec || tvp->tv_usec) 380180025Sdfr timeout = tvtohz(tvp); 381180025Sdfr else 382180025Sdfr timeout = 0; 383177633Sdfr 384177633Sdfr if (cu->cu_connect && !cu->cu_connected) { 385177633Sdfr mtx_unlock(&cs->cs_lock); 386177633Sdfr error = soconnect(cu->cu_socket, 387177633Sdfr (struct sockaddr *)&cu->cu_raddr, curthread); 388177633Sdfr mtx_lock(&cs->cs_lock); 389177633Sdfr if (error) { 390184588Sdfr errp->re_errno = error; 391184588Sdfr errp->re_status = stat = RPC_CANTSEND; 392177633Sdfr goto out; 393177633Sdfr } 394177633Sdfr cu->cu_connected = 1; 395177633Sdfr } 396177633Sdfr if (cu->cu_connected) { 397177633Sdfr sa = NULL; 398177633Sdfr salen = 0; 399177633Sdfr } else { 400177633Sdfr sa = (struct sockaddr *)&cu->cu_raddr; 401177633Sdfr salen = cu->cu_rlen; 402177633Sdfr } 403180025Sdfr time_waited = 0; 404180025Sdfr retrans = 0; 405184588Sdfr if (ext && ext->rc_timers) { 406184588Sdfr rt = ext->rc_timers; 407184588Sdfr if (!rt->rt_rtxcur) 408184588Sdfr rt->rt_rtxcur = tvtohz(&cu->cu_wait); 409184588Sdfr retransmit_time = next_sendtime = rt->rt_rtxcur; 410184588Sdfr } else { 411184588Sdfr rt = NULL; 412184588Sdfr retransmit_time = next_sendtime = tvtohz(&cu->cu_wait); 413184588Sdfr } 414177633Sdfr 415180025Sdfr starttime = ticks; 416177633Sdfr 417177633Sdfrcall_again: 418177633Sdfr mtx_assert(&cs->cs_lock, MA_OWNED); 419177633Sdfr 420177633Sdfr cu->cu_xid++; 421177633Sdfr xid = cu->cu_xid; 422177633Sdfr 423177633Sdfrsend_again: 424177633Sdfr mtx_unlock(&cs->cs_lock); 425177633Sdfr 426177633Sdfr MGETHDR(mreq, M_WAIT, MT_DATA); 427184588Sdfr KASSERT(cu->cu_mcalllen <= MHLEN, ("RPC header too big")); 428184588Sdfr bcopy(cu->cu_mcallc, mreq->m_data, cu->cu_mcalllen); 429184588Sdfr mreq->m_len = cu->cu_mcalllen; 430177633Sdfr 431177633Sdfr /* 432177633Sdfr * The XID is the first thing in the request. 433177633Sdfr */ 434177633Sdfr *mtod(mreq, uint32_t *) = htonl(xid); 435177633Sdfr 436177633Sdfr xdrmbuf_create(&xdrs, mreq, XDR_ENCODE); 437177633Sdfr 438184588Sdfr if (cu->cu_async == TRUE && args == NULL) 439177633Sdfr goto get_reply; 440177633Sdfr 441177633Sdfr if ((! XDR_PUTINT32(&xdrs, &proc)) || 442184588Sdfr (! AUTH_MARSHALL(auth, xid, &xdrs, 443184588Sdfr m_copym(args, 0, M_COPYALL, M_WAITOK)))) { 444184588Sdfr errp->re_status = stat = RPC_CANTENCODEARGS; 445177633Sdfr mtx_lock(&cs->cs_lock); 446177633Sdfr goto out; 447177633Sdfr } 448184588Sdfr mreq->m_pkthdr.len = m_length(mreq, NULL); 449177633Sdfr 450180025Sdfr cr->cr_xid = xid; 451177633Sdfr mtx_lock(&cs->cs_lock); 452184588Sdfr 453184588Sdfr /* 454184588Sdfr * Try to get a place in the congestion window. 455184588Sdfr */ 456184588Sdfr while (cu->cu_sent >= cu->cu_cwnd) { 457184588Sdfr cu->cu_cwnd_wait = TRUE; 458184588Sdfr error = msleep(&cu->cu_cwnd_wait, &cs->cs_lock, 459184588Sdfr cu->cu_waitflag, "rpccwnd", 0); 460184588Sdfr if (error) { 461184588Sdfr errp->re_errno = error; 462184588Sdfr errp->re_status = stat = RPC_CANTSEND; 463184588Sdfr goto out; 464184588Sdfr } 465184588Sdfr } 466184588Sdfr cu->cu_sent += CWNDSCALE; 467184588Sdfr 468180025Sdfr TAILQ_INSERT_TAIL(&cs->cs_pending, cr, cr_link); 469177633Sdfr mtx_unlock(&cs->cs_lock); 470177633Sdfr 471177633Sdfr /* 472177633Sdfr * sosend consumes mreq. 473177633Sdfr */ 474177633Sdfr error = sosend(cu->cu_socket, sa, NULL, mreq, NULL, 0, curthread); 475177633Sdfr mreq = NULL; 476177633Sdfr 477177633Sdfr /* 478177633Sdfr * sub-optimal code appears here because we have 479177633Sdfr * some clock time to spare while the packets are in flight. 480177633Sdfr * (We assume that this is actually only executed once.) 481177633Sdfr */ 482184588Sdfr reply_msg.acpted_rply.ar_verf.oa_flavor = AUTH_NULL; 483184588Sdfr reply_msg.acpted_rply.ar_verf.oa_base = cr->cr_verf; 484184588Sdfr reply_msg.acpted_rply.ar_verf.oa_length = 0; 485184588Sdfr reply_msg.acpted_rply.ar_results.where = NULL; 486184588Sdfr reply_msg.acpted_rply.ar_results.proc = (xdrproc_t)xdr_void; 487177633Sdfr 488177633Sdfr mtx_lock(&cs->cs_lock); 489177633Sdfr if (error) { 490180025Sdfr TAILQ_REMOVE(&cs->cs_pending, cr, cr_link); 491184588Sdfr errp->re_errno = error; 492184588Sdfr errp->re_status = stat = RPC_CANTSEND; 493184588Sdfr cu->cu_sent -= CWNDSCALE; 494184588Sdfr if (cu->cu_cwnd_wait) { 495184588Sdfr cu->cu_cwnd_wait = FALSE; 496184588Sdfr wakeup(&cu->cu_cwnd_wait); 497184588Sdfr } 498177633Sdfr goto out; 499177633Sdfr } 500177633Sdfr 501177633Sdfr /* 502177633Sdfr * Check to see if we got an upcall while waiting for the 503180025Sdfr * lock. 504177633Sdfr */ 505180025Sdfr if (cr->cr_error) { 506180025Sdfr TAILQ_REMOVE(&cs->cs_pending, cr, cr_link); 507184588Sdfr errp->re_errno = cr->cr_error; 508184588Sdfr errp->re_status = stat = RPC_CANTRECV; 509184588Sdfr cu->cu_sent -= CWNDSCALE; 510184588Sdfr if (cu->cu_cwnd_wait) { 511184588Sdfr cu->cu_cwnd_wait = FALSE; 512184588Sdfr wakeup(&cu->cu_cwnd_wait); 513184588Sdfr } 514177633Sdfr goto out; 515177633Sdfr } 516180025Sdfr if (cr->cr_mrep) { 517180025Sdfr TAILQ_REMOVE(&cs->cs_pending, cr, cr_link); 518184588Sdfr cu->cu_sent -= CWNDSCALE; 519184588Sdfr if (cu->cu_cwnd_wait) { 520184588Sdfr cu->cu_cwnd_wait = FALSE; 521184588Sdfr wakeup(&cu->cu_cwnd_wait); 522184588Sdfr } 523177633Sdfr goto got_reply; 524177633Sdfr } 525177633Sdfr 526177633Sdfr /* 527177633Sdfr * Hack to provide rpc-based message passing 528177633Sdfr */ 529180025Sdfr if (timeout == 0) { 530180025Sdfr TAILQ_REMOVE(&cs->cs_pending, cr, cr_link); 531184588Sdfr errp->re_status = stat = RPC_TIMEDOUT; 532184588Sdfr cu->cu_sent -= CWNDSCALE; 533184588Sdfr if (cu->cu_cwnd_wait) { 534184588Sdfr cu->cu_cwnd_wait = FALSE; 535184588Sdfr wakeup(&cu->cu_cwnd_wait); 536184588Sdfr } 537177633Sdfr goto out; 538177633Sdfr } 539177633Sdfr 540177633Sdfrget_reply: 541177633Sdfr for (;;) { 542177633Sdfr /* Decide how long to wait. */ 543180025Sdfr if (next_sendtime < timeout) 544177633Sdfr tv = next_sendtime; 545180025Sdfr else 546180025Sdfr tv = timeout; 547180025Sdfr tv -= time_waited; 548180025Sdfr 549180025Sdfr if (tv > 0) { 550195245Srmacklem if (cu->cu_closing || cu->cu_closed) { 551180025Sdfr error = 0; 552195245Srmacklem cr->cr_error = ESHUTDOWN; 553195245Srmacklem } else { 554180025Sdfr error = msleep(cr, &cs->cs_lock, 555180025Sdfr cu->cu_waitflag, cu->cu_waitchan, tv); 556195245Srmacklem } 557177633Sdfr } else { 558180025Sdfr error = EWOULDBLOCK; 559177633Sdfr } 560177633Sdfr 561180025Sdfr TAILQ_REMOVE(&cs->cs_pending, cr, cr_link); 562184588Sdfr cu->cu_sent -= CWNDSCALE; 563184588Sdfr if (cu->cu_cwnd_wait) { 564184588Sdfr cu->cu_cwnd_wait = FALSE; 565184588Sdfr wakeup(&cu->cu_cwnd_wait); 566184588Sdfr } 567177633Sdfr 568177633Sdfr if (!error) { 569177633Sdfr /* 570177633Sdfr * We were woken up by the upcall. If the 571177633Sdfr * upcall had a receive error, report that, 572177633Sdfr * otherwise we have a reply. 573177633Sdfr */ 574180025Sdfr if (cr->cr_error) { 575184588Sdfr errp->re_errno = cr->cr_error; 576184588Sdfr errp->re_status = stat = RPC_CANTRECV; 577177633Sdfr goto out; 578177633Sdfr } 579184588Sdfr 580184588Sdfr cu->cu_cwnd += (CWNDSCALE * CWNDSCALE 581184588Sdfr + cu->cu_cwnd / 2) / cu->cu_cwnd; 582184588Sdfr if (cu->cu_cwnd > MAXCWND) 583184588Sdfr cu->cu_cwnd = MAXCWND; 584184588Sdfr 585184588Sdfr if (rt) { 586184588Sdfr /* 587184588Sdfr * Add one to the time since a tick 588184588Sdfr * count of N means that the actual 589184588Sdfr * time taken was somewhere between N 590184588Sdfr * and N+1. 591184588Sdfr */ 592184588Sdfr rtt = ticks - starttime + 1; 593184588Sdfr 594184588Sdfr /* 595184588Sdfr * Update our estimate of the round 596184588Sdfr * trip time using roughly the 597184588Sdfr * algorithm described in RFC 598184588Sdfr * 2988. Given an RTT sample R: 599184588Sdfr * 600184588Sdfr * RTTVAR = (1-beta) * RTTVAR + beta * |SRTT-R| 601184588Sdfr * SRTT = (1-alpha) * SRTT + alpha * R 602184588Sdfr * 603184588Sdfr * where alpha = 0.125 and beta = 0.25. 604184588Sdfr * 605184588Sdfr * The initial retransmit timeout is 606184588Sdfr * SRTT + 4*RTTVAR and doubles on each 607184588Sdfr * retransmision. 608184588Sdfr */ 609184588Sdfr if (rt->rt_srtt == 0) { 610184588Sdfr rt->rt_srtt = rtt; 611184588Sdfr rt->rt_deviate = rtt / 2; 612184588Sdfr } else { 613184588Sdfr int32_t error = rtt - rt->rt_srtt; 614184588Sdfr rt->rt_srtt += error / 8; 615184588Sdfr error = abs(error) - rt->rt_deviate; 616184588Sdfr rt->rt_deviate += error / 4; 617184588Sdfr } 618184588Sdfr rt->rt_rtxcur = rt->rt_srtt + 4*rt->rt_deviate; 619184588Sdfr } 620184588Sdfr 621177633Sdfr break; 622177633Sdfr } 623177633Sdfr 624177633Sdfr /* 625177633Sdfr * The sleep returned an error so our request is still 626177633Sdfr * on the list. If we got EWOULDBLOCK, we may want to 627177633Sdfr * re-send the request. 628177633Sdfr */ 629177633Sdfr if (error != EWOULDBLOCK) { 630184588Sdfr errp->re_errno = error; 631177633Sdfr if (error == EINTR) 632184588Sdfr errp->re_status = stat = RPC_INTR; 633177633Sdfr else 634184588Sdfr errp->re_status = stat = RPC_CANTRECV; 635177633Sdfr goto out; 636177633Sdfr } 637177633Sdfr 638180025Sdfr time_waited = ticks - starttime; 639177633Sdfr 640177633Sdfr /* Check for timeout. */ 641180025Sdfr if (time_waited > timeout) { 642184588Sdfr errp->re_errno = EWOULDBLOCK; 643184588Sdfr errp->re_status = stat = RPC_TIMEDOUT; 644177633Sdfr goto out; 645177633Sdfr } 646177633Sdfr 647177633Sdfr /* Retransmit if necessary. */ 648180025Sdfr if (time_waited >= next_sendtime) { 649184588Sdfr cu->cu_cwnd /= 2; 650184588Sdfr if (cu->cu_cwnd < CWNDSCALE) 651184588Sdfr cu->cu_cwnd = CWNDSCALE; 652180025Sdfr if (ext && ext->rc_feedback) { 653180025Sdfr mtx_unlock(&cs->cs_lock); 654180025Sdfr if (retrans == 0) 655180025Sdfr ext->rc_feedback(FEEDBACK_REXMIT1, 656180025Sdfr proc, ext->rc_feedback_arg); 657180025Sdfr else 658180025Sdfr ext->rc_feedback(FEEDBACK_REXMIT2, 659180025Sdfr proc, ext->rc_feedback_arg); 660180025Sdfr mtx_lock(&cs->cs_lock); 661180025Sdfr } 662184588Sdfr if (cu->cu_closing || cu->cu_closed) { 663184588Sdfr errp->re_errno = ESHUTDOWN; 664184588Sdfr errp->re_status = stat = RPC_CANTRECV; 665180025Sdfr goto out; 666180025Sdfr } 667180025Sdfr retrans++; 668177633Sdfr /* update retransmit_time */ 669180025Sdfr if (retransmit_time < RPC_MAX_BACKOFF * hz) 670180025Sdfr retransmit_time = 2 * retransmit_time; 671180025Sdfr next_sendtime += retransmit_time; 672177633Sdfr goto send_again; 673177633Sdfr } 674180025Sdfr TAILQ_INSERT_TAIL(&cs->cs_pending, cr, cr_link); 675177633Sdfr } 676177633Sdfr 677177633Sdfrgot_reply: 678177633Sdfr /* 679177633Sdfr * Now decode and validate the response. We need to drop the 680177633Sdfr * lock since xdr_replymsg may end up sleeping in malloc. 681177633Sdfr */ 682177633Sdfr mtx_unlock(&cs->cs_lock); 683177633Sdfr 684180025Sdfr if (ext && ext->rc_feedback) 685180025Sdfr ext->rc_feedback(FEEDBACK_OK, proc, ext->rc_feedback_arg); 686180025Sdfr 687180025Sdfr xdrmbuf_create(&xdrs, cr->cr_mrep, XDR_DECODE); 688177633Sdfr ok = xdr_replymsg(&xdrs, &reply_msg); 689180025Sdfr cr->cr_mrep = NULL; 690177633Sdfr 691177633Sdfr if (ok) { 692177633Sdfr if ((reply_msg.rm_reply.rp_stat == MSG_ACCEPTED) && 693184588Sdfr (reply_msg.acpted_rply.ar_stat == SUCCESS)) 694184588Sdfr errp->re_status = stat = RPC_SUCCESS; 695177633Sdfr else 696184588Sdfr stat = _seterr_reply(&reply_msg, &(cu->cu_error)); 697177633Sdfr 698184588Sdfr if (errp->re_status == RPC_SUCCESS) { 699184588Sdfr results = xdrmbuf_getall(&xdrs); 700184588Sdfr if (! AUTH_VALIDATE(auth, xid, 701184588Sdfr &reply_msg.acpted_rply.ar_verf, 702184588Sdfr &results)) { 703184588Sdfr errp->re_status = stat = RPC_AUTHERROR; 704184588Sdfr errp->re_why = AUTH_INVALIDRESP; 705184588Sdfr if (retrans && 706184588Sdfr auth->ah_cred.oa_flavor == RPCSEC_GSS) { 707184588Sdfr /* 708184588Sdfr * If we retransmitted, its 709184588Sdfr * possible that we will 710184588Sdfr * receive a reply for one of 711184588Sdfr * the earlier transmissions 712184588Sdfr * (which will use an older 713184588Sdfr * RPCSEC_GSS sequence 714184588Sdfr * number). In this case, just 715184588Sdfr * go back and listen for a 716184588Sdfr * new reply. We could keep a 717184588Sdfr * record of all the seq 718184588Sdfr * numbers we have transmitted 719184588Sdfr * so far so that we could 720184588Sdfr * accept a reply for any of 721184588Sdfr * them here. 722184588Sdfr */ 723184588Sdfr XDR_DESTROY(&xdrs); 724184588Sdfr mtx_lock(&cs->cs_lock); 725184588Sdfr TAILQ_INSERT_TAIL(&cs->cs_pending, 726184588Sdfr cr, cr_link); 727184588Sdfr cr->cr_mrep = NULL; 728184588Sdfr goto get_reply; 729184588Sdfr } 730184588Sdfr } else { 731184588Sdfr *resultsp = results; 732177633Sdfr } 733177633Sdfr } /* end successful completion */ 734177633Sdfr /* 735177633Sdfr * If unsuccesful AND error is an authentication error 736177633Sdfr * then refresh credentials and try again, else break 737177633Sdfr */ 738184588Sdfr else if (stat == RPC_AUTHERROR) 739177633Sdfr /* maybe our credentials need to be refreshed ... */ 740177633Sdfr if (nrefreshes > 0 && 741184588Sdfr AUTH_REFRESH(auth, &reply_msg)) { 742177633Sdfr nrefreshes--; 743184588Sdfr XDR_DESTROY(&xdrs); 744184588Sdfr mtx_lock(&cs->cs_lock); 745177633Sdfr goto call_again; 746177633Sdfr } 747177633Sdfr /* end of unsuccessful completion */ 748177633Sdfr } /* end of valid reply message */ 749177633Sdfr else { 750184588Sdfr errp->re_status = stat = RPC_CANTDECODERES; 751177633Sdfr 752177633Sdfr } 753184588Sdfr XDR_DESTROY(&xdrs); 754184588Sdfr mtx_lock(&cs->cs_lock); 755177633Sdfrout: 756177633Sdfr mtx_assert(&cs->cs_lock, MA_OWNED); 757177633Sdfr 758177633Sdfr if (mreq) 759177633Sdfr m_freem(mreq); 760180025Sdfr if (cr->cr_mrep) 761180025Sdfr m_freem(cr->cr_mrep); 762177633Sdfr 763180025Sdfr cu->cu_threads--; 764180025Sdfr if (cu->cu_closing) 765180025Sdfr wakeup(cu); 766180025Sdfr 767177633Sdfr mtx_unlock(&cs->cs_lock); 768180025Sdfr 769184588Sdfr if (auth && stat != RPC_SUCCESS) 770184588Sdfr AUTH_VALIDATE(auth, xid, NULL, NULL); 771184588Sdfr 772180025Sdfr free(cr, M_RPC); 773180025Sdfr 774184588Sdfr return (stat); 775177633Sdfr} 776177633Sdfr 777177633Sdfrstatic void 778177633Sdfrclnt_dg_geterr(CLIENT *cl, struct rpc_err *errp) 779177633Sdfr{ 780177633Sdfr struct cu_data *cu = (struct cu_data *)cl->cl_private; 781177633Sdfr 782177633Sdfr *errp = cu->cu_error; 783177633Sdfr} 784177633Sdfr 785177633Sdfrstatic bool_t 786177633Sdfrclnt_dg_freeres(CLIENT *cl, xdrproc_t xdr_res, void *res_ptr) 787177633Sdfr{ 788177633Sdfr XDR xdrs; 789177633Sdfr bool_t dummy; 790177633Sdfr 791177633Sdfr xdrs.x_op = XDR_FREE; 792177633Sdfr dummy = (*xdr_res)(&xdrs, res_ptr); 793177633Sdfr 794177633Sdfr return (dummy); 795177633Sdfr} 796177633Sdfr 797177633Sdfr/*ARGSUSED*/ 798177633Sdfrstatic void 799177633Sdfrclnt_dg_abort(CLIENT *h) 800177633Sdfr{ 801177633Sdfr} 802177633Sdfr 803177633Sdfrstatic bool_t 804177633Sdfrclnt_dg_control(CLIENT *cl, u_int request, void *info) 805177633Sdfr{ 806177633Sdfr struct cu_data *cu = (struct cu_data *)cl->cl_private; 807193272Sjhb struct cu_socket *cs; 808177633Sdfr struct sockaddr *addr; 809177633Sdfr 810193272Sjhb cs = cu->cu_socket->so_rcv.sb_upcallarg; 811177633Sdfr mtx_lock(&cs->cs_lock); 812177633Sdfr 813177633Sdfr switch (request) { 814177633Sdfr case CLSET_FD_CLOSE: 815177633Sdfr cu->cu_closeit = TRUE; 816177633Sdfr mtx_unlock(&cs->cs_lock); 817177633Sdfr return (TRUE); 818177633Sdfr case CLSET_FD_NCLOSE: 819177633Sdfr cu->cu_closeit = FALSE; 820177633Sdfr mtx_unlock(&cs->cs_lock); 821177633Sdfr return (TRUE); 822177633Sdfr } 823177633Sdfr 824177633Sdfr /* for other requests which use info */ 825177633Sdfr if (info == NULL) { 826177633Sdfr mtx_unlock(&cs->cs_lock); 827177633Sdfr return (FALSE); 828177633Sdfr } 829177633Sdfr switch (request) { 830177633Sdfr case CLSET_TIMEOUT: 831177633Sdfr if (time_not_ok((struct timeval *)info)) { 832177633Sdfr mtx_unlock(&cs->cs_lock); 833177633Sdfr return (FALSE); 834177633Sdfr } 835177633Sdfr cu->cu_total = *(struct timeval *)info; 836177633Sdfr break; 837177633Sdfr case CLGET_TIMEOUT: 838177633Sdfr *(struct timeval *)info = cu->cu_total; 839177633Sdfr break; 840177633Sdfr case CLSET_RETRY_TIMEOUT: 841177633Sdfr if (time_not_ok((struct timeval *)info)) { 842177633Sdfr mtx_unlock(&cs->cs_lock); 843177633Sdfr return (FALSE); 844177633Sdfr } 845177633Sdfr cu->cu_wait = *(struct timeval *)info; 846177633Sdfr break; 847177633Sdfr case CLGET_RETRY_TIMEOUT: 848177633Sdfr *(struct timeval *)info = cu->cu_wait; 849177633Sdfr break; 850177633Sdfr case CLGET_SVC_ADDR: 851177633Sdfr /* 852177633Sdfr * Slightly different semantics to userland - we use 853177633Sdfr * sockaddr instead of netbuf. 854177633Sdfr */ 855177633Sdfr memcpy(info, &cu->cu_raddr, cu->cu_raddr.ss_len); 856177633Sdfr break; 857177633Sdfr case CLSET_SVC_ADDR: /* set to new address */ 858177633Sdfr addr = (struct sockaddr *)info; 859177633Sdfr (void) memcpy(&cu->cu_raddr, addr, addr->sa_len); 860177633Sdfr break; 861177633Sdfr case CLGET_XID: 862177633Sdfr *(uint32_t *)info = cu->cu_xid; 863177633Sdfr break; 864177633Sdfr 865177633Sdfr case CLSET_XID: 866177633Sdfr /* This will set the xid of the NEXT call */ 867177633Sdfr /* decrement by 1 as clnt_dg_call() increments once */ 868177633Sdfr cu->cu_xid = *(uint32_t *)info - 1; 869177633Sdfr break; 870177633Sdfr 871177633Sdfr case CLGET_VERS: 872177633Sdfr /* 873177633Sdfr * This RELIES on the information that, in the call body, 874177633Sdfr * the version number field is the fifth field from the 875177633Sdfr * begining of the RPC header. MUST be changed if the 876177633Sdfr * call_struct is changed 877177633Sdfr */ 878177633Sdfr *(uint32_t *)info = 879177633Sdfr ntohl(*(uint32_t *)(void *)(cu->cu_mcallc + 880177633Sdfr 4 * BYTES_PER_XDR_UNIT)); 881177633Sdfr break; 882177633Sdfr 883177633Sdfr case CLSET_VERS: 884177633Sdfr *(uint32_t *)(void *)(cu->cu_mcallc + 4 * BYTES_PER_XDR_UNIT) 885177633Sdfr = htonl(*(uint32_t *)info); 886177633Sdfr break; 887177633Sdfr 888177633Sdfr case CLGET_PROG: 889177633Sdfr /* 890177633Sdfr * This RELIES on the information that, in the call body, 891177633Sdfr * the program number field is the fourth field from the 892177633Sdfr * begining of the RPC header. MUST be changed if the 893177633Sdfr * call_struct is changed 894177633Sdfr */ 895177633Sdfr *(uint32_t *)info = 896177633Sdfr ntohl(*(uint32_t *)(void *)(cu->cu_mcallc + 897177633Sdfr 3 * BYTES_PER_XDR_UNIT)); 898177633Sdfr break; 899177633Sdfr 900177633Sdfr case CLSET_PROG: 901177633Sdfr *(uint32_t *)(void *)(cu->cu_mcallc + 3 * BYTES_PER_XDR_UNIT) 902177633Sdfr = htonl(*(uint32_t *)info); 903177633Sdfr break; 904177633Sdfr case CLSET_ASYNC: 905177633Sdfr cu->cu_async = *(int *)info; 906177633Sdfr break; 907177633Sdfr case CLSET_CONNECT: 908177633Sdfr cu->cu_connect = *(int *)info; 909177633Sdfr break; 910177633Sdfr case CLSET_WAITCHAN: 911184588Sdfr cu->cu_waitchan = (const char *)info; 912177633Sdfr break; 913177633Sdfr case CLGET_WAITCHAN: 914177633Sdfr *(const char **) info = cu->cu_waitchan; 915177633Sdfr break; 916177633Sdfr case CLSET_INTERRUPTIBLE: 917177633Sdfr if (*(int *) info) 918177633Sdfr cu->cu_waitflag = PCATCH; 919177633Sdfr else 920177633Sdfr cu->cu_waitflag = 0; 921177633Sdfr break; 922177633Sdfr case CLGET_INTERRUPTIBLE: 923177633Sdfr if (cu->cu_waitflag) 924177633Sdfr *(int *) info = TRUE; 925177633Sdfr else 926177633Sdfr *(int *) info = FALSE; 927177633Sdfr break; 928177633Sdfr default: 929177633Sdfr mtx_unlock(&cs->cs_lock); 930177633Sdfr return (FALSE); 931177633Sdfr } 932177633Sdfr mtx_unlock(&cs->cs_lock); 933177633Sdfr return (TRUE); 934177633Sdfr} 935177633Sdfr 936177633Sdfrstatic void 937184588Sdfrclnt_dg_close(CLIENT *cl) 938177633Sdfr{ 939177633Sdfr struct cu_data *cu = (struct cu_data *)cl->cl_private; 940193272Sjhb struct cu_socket *cs; 941180025Sdfr struct cu_request *cr; 942177633Sdfr 943193272Sjhb cs = cu->cu_socket->so_rcv.sb_upcallarg; 944180025Sdfr mtx_lock(&cs->cs_lock); 945177633Sdfr 946184588Sdfr if (cu->cu_closed) { 947184588Sdfr mtx_unlock(&cs->cs_lock); 948184588Sdfr return; 949184588Sdfr } 950184588Sdfr 951184588Sdfr if (cu->cu_closing) { 952184588Sdfr while (cu->cu_closing) 953184588Sdfr msleep(cu, &cs->cs_lock, 0, "rpcclose", 0); 954184588Sdfr KASSERT(cu->cu_closed, ("client should be closed")); 955184588Sdfr mtx_unlock(&cs->cs_lock); 956184588Sdfr return; 957184588Sdfr } 958184588Sdfr 959180025Sdfr /* 960180025Sdfr * Abort any pending requests and wait until everyone 961180025Sdfr * has finished with clnt_vc_call. 962180025Sdfr */ 963180025Sdfr cu->cu_closing = TRUE; 964180025Sdfr TAILQ_FOREACH(cr, &cs->cs_pending, cr_link) { 965180025Sdfr if (cr->cr_client == cl) { 966180025Sdfr cr->cr_xid = 0; 967180025Sdfr cr->cr_error = ESHUTDOWN; 968180025Sdfr wakeup(cr); 969180025Sdfr } 970180025Sdfr } 971180025Sdfr 972180025Sdfr while (cu->cu_threads) 973180025Sdfr msleep(cu, &cs->cs_lock, 0, "rpcclose", 0); 974180025Sdfr 975184588Sdfr cu->cu_closing = FALSE; 976184588Sdfr cu->cu_closed = TRUE; 977184588Sdfr 978184588Sdfr mtx_unlock(&cs->cs_lock); 979184588Sdfr wakeup(cu); 980184588Sdfr} 981184588Sdfr 982184588Sdfrstatic void 983184588Sdfrclnt_dg_destroy(CLIENT *cl) 984184588Sdfr{ 985184588Sdfr struct cu_data *cu = (struct cu_data *)cl->cl_private; 986193272Sjhb struct cu_socket *cs; 987184588Sdfr struct socket *so = NULL; 988184588Sdfr bool_t lastsocketref; 989184588Sdfr 990193272Sjhb cs = cu->cu_socket->so_rcv.sb_upcallarg; 991184588Sdfr clnt_dg_close(cl); 992184588Sdfr 993184588Sdfr mtx_lock(&cs->cs_lock); 994184588Sdfr 995177633Sdfr cs->cs_refs--; 996177633Sdfr if (cs->cs_refs == 0) { 997193437Srmacklem mtx_unlock(&cs->cs_lock); 998180025Sdfr SOCKBUF_LOCK(&cu->cu_socket->so_rcv); 999193272Sjhb soupcall_clear(cu->cu_socket, SO_RCV); 1000193437Srmacklem clnt_dg_upcallsdone(cu->cu_socket, cs); 1001177633Sdfr SOCKBUF_UNLOCK(&cu->cu_socket->so_rcv); 1002193437Srmacklem mtx_destroy(&cs->cs_lock); 1003177633Sdfr mem_free(cs, sizeof(*cs)); 1004177633Sdfr lastsocketref = TRUE; 1005177633Sdfr } else { 1006177633Sdfr mtx_unlock(&cs->cs_lock); 1007177633Sdfr lastsocketref = FALSE; 1008177633Sdfr } 1009177633Sdfr 1010180025Sdfr if (cu->cu_closeit && lastsocketref) { 1011177633Sdfr so = cu->cu_socket; 1012177633Sdfr cu->cu_socket = NULL; 1013177633Sdfr } 1014177633Sdfr 1015177633Sdfr if (so) 1016177633Sdfr soclose(so); 1017177633Sdfr 1018177633Sdfr if (cl->cl_netid && cl->cl_netid[0]) 1019177633Sdfr mem_free(cl->cl_netid, strlen(cl->cl_netid) +1); 1020177633Sdfr if (cl->cl_tp && cl->cl_tp[0]) 1021177633Sdfr mem_free(cl->cl_tp, strlen(cl->cl_tp) +1); 1022177633Sdfr mem_free(cu, sizeof (*cu)); 1023177633Sdfr mem_free(cl, sizeof (CLIENT)); 1024177633Sdfr} 1025177633Sdfr 1026177633Sdfr/* 1027177633Sdfr * Make sure that the time is not garbage. -1 value is allowed. 1028177633Sdfr */ 1029177633Sdfrstatic bool_t 1030177633Sdfrtime_not_ok(struct timeval *t) 1031177633Sdfr{ 1032177633Sdfr return (t->tv_sec < -1 || t->tv_sec > 100000000 || 1033177633Sdfr t->tv_usec < -1 || t->tv_usec > 1000000); 1034177633Sdfr} 1035177633Sdfr 1036193272Sjhbint 1037177633Sdfrclnt_dg_soupcall(struct socket *so, void *arg, int waitflag) 1038177633Sdfr{ 1039177633Sdfr struct cu_socket *cs = (struct cu_socket *) arg; 1040177633Sdfr struct uio uio; 1041177633Sdfr struct mbuf *m; 1042177633Sdfr struct mbuf *control; 1043177633Sdfr struct cu_request *cr; 1044177633Sdfr int error, rcvflag, foundreq; 1045177633Sdfr uint32_t xid; 1046177633Sdfr 1047193437Srmacklem cs->cs_upcallrefs++; 1048177633Sdfr uio.uio_resid = 1000000000; 1049177633Sdfr uio.uio_td = curthread; 1050177633Sdfr do { 1051193272Sjhb SOCKBUF_UNLOCK(&so->so_rcv); 1052177633Sdfr m = NULL; 1053177633Sdfr control = NULL; 1054177633Sdfr rcvflag = MSG_DONTWAIT; 1055177633Sdfr error = soreceive(so, NULL, &uio, &m, &control, &rcvflag); 1056177633Sdfr if (control) 1057177633Sdfr m_freem(control); 1058193272Sjhb SOCKBUF_LOCK(&so->so_rcv); 1059177633Sdfr 1060177633Sdfr if (error == EWOULDBLOCK) 1061177633Sdfr break; 1062177633Sdfr 1063177633Sdfr /* 1064177633Sdfr * If there was an error, wake up all pending 1065177633Sdfr * requests. 1066177633Sdfr */ 1067177633Sdfr if (error) { 1068177633Sdfr mtx_lock(&cs->cs_lock); 1069177633Sdfr TAILQ_FOREACH(cr, &cs->cs_pending, cr_link) { 1070180025Sdfr cr->cr_xid = 0; 1071177633Sdfr cr->cr_error = error; 1072177633Sdfr wakeup(cr); 1073177633Sdfr } 1074177633Sdfr mtx_unlock(&cs->cs_lock); 1075177633Sdfr break; 1076177633Sdfr } 1077177633Sdfr 1078177633Sdfr /* 1079177633Sdfr * The XID is in the first uint32_t of the reply. 1080177633Sdfr */ 1081184588Sdfr if (m->m_len < sizeof(xid)) 1082184588Sdfr m = m_pullup(m, sizeof(xid)); 1083177633Sdfr if (!m) 1084180025Sdfr /* 1085180025Sdfr * Should never happen. 1086180025Sdfr */ 1087180025Sdfr continue; 1088180025Sdfr 1089177633Sdfr xid = ntohl(*mtod(m, uint32_t *)); 1090177633Sdfr 1091177633Sdfr /* 1092177633Sdfr * Attempt to match this reply with a pending request. 1093177633Sdfr */ 1094177633Sdfr mtx_lock(&cs->cs_lock); 1095177633Sdfr foundreq = 0; 1096177633Sdfr TAILQ_FOREACH(cr, &cs->cs_pending, cr_link) { 1097177633Sdfr if (cr->cr_xid == xid) { 1098177633Sdfr /* 1099180025Sdfr * This one matches. We leave the 1100177633Sdfr * reply mbuf in cr->cr_mrep. Set the 1101180025Sdfr * XID to zero so that we will ignore 1102180025Sdfr * any duplicated replies that arrive 1103180025Sdfr * before clnt_dg_call removes it from 1104180025Sdfr * the queue. 1105177633Sdfr */ 1106177633Sdfr cr->cr_xid = 0; 1107177633Sdfr cr->cr_mrep = m; 1108177633Sdfr cr->cr_error = 0; 1109177633Sdfr foundreq = 1; 1110177633Sdfr wakeup(cr); 1111177633Sdfr break; 1112177633Sdfr } 1113177633Sdfr } 1114177633Sdfr mtx_unlock(&cs->cs_lock); 1115177633Sdfr 1116177633Sdfr /* 1117177633Sdfr * If we didn't find the matching request, just drop 1118177633Sdfr * it - its probably a repeated reply. 1119177633Sdfr */ 1120177633Sdfr if (!foundreq) 1121177633Sdfr m_freem(m); 1122177633Sdfr } while (m); 1123193437Srmacklem cs->cs_upcallrefs--; 1124193437Srmacklem if (cs->cs_upcallrefs < 0) 1125193437Srmacklem panic("rpcdg upcall refcnt"); 1126193437Srmacklem if (cs->cs_upcallrefs == 0) 1127193437Srmacklem wakeup(&cs->cs_upcallrefs); 1128193272Sjhb return (SU_OK); 1129177633Sdfr} 1130177633Sdfr 1131193437Srmacklem/* 1132193437Srmacklem * Wait for all upcalls in progress to complete. 1133193437Srmacklem */ 1134193437Srmacklemstatic void 1135193437Srmacklemclnt_dg_upcallsdone(struct socket *so, struct cu_socket *cs) 1136193437Srmacklem{ 1137193437Srmacklem 1138193437Srmacklem SOCKBUF_LOCK_ASSERT(&so->so_rcv); 1139193437Srmacklem 1140193437Srmacklem while (cs->cs_upcallrefs > 0) 1141193437Srmacklem (void) msleep(&cs->cs_upcallrefs, SOCKBUF_MTX(&so->so_rcv), 0, 1142193437Srmacklem "rpcdgup", 0); 1143193437Srmacklem} 1144