clnt_dg.c revision 196503
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 196503 2009-08-24 10:09:30Z zec $"); 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 60196503Szec#include <net/vnet.h> 61196503Szec 62177633Sdfr#include <rpc/rpc.h> 63177685Sdfr#include <rpc/rpc_com.h> 64177633Sdfr 65177633Sdfr 66177633Sdfr#ifdef _FREEFALL_CONFIG 67177633Sdfr/* 68177633Sdfr * Disable RPC exponential back-off for FreeBSD.org systems. 69177633Sdfr */ 70177633Sdfr#define RPC_MAX_BACKOFF 1 /* second */ 71177633Sdfr#else 72177633Sdfr#define RPC_MAX_BACKOFF 30 /* seconds */ 73177633Sdfr#endif 74177633Sdfr 75177633Sdfrstatic bool_t time_not_ok(struct timeval *); 76180025Sdfrstatic enum clnt_stat clnt_dg_call(CLIENT *, struct rpc_callextra *, 77184588Sdfr rpcproc_t, struct mbuf *, struct mbuf **, struct timeval); 78177633Sdfrstatic void clnt_dg_geterr(CLIENT *, struct rpc_err *); 79177633Sdfrstatic bool_t clnt_dg_freeres(CLIENT *, xdrproc_t, void *); 80177633Sdfrstatic void clnt_dg_abort(CLIENT *); 81177633Sdfrstatic bool_t clnt_dg_control(CLIENT *, u_int, void *); 82184588Sdfrstatic void clnt_dg_close(CLIENT *); 83177633Sdfrstatic void clnt_dg_destroy(CLIENT *); 84193272Sjhbstatic int clnt_dg_soupcall(struct socket *so, void *arg, int waitflag); 85177633Sdfr 86177633Sdfrstatic struct clnt_ops clnt_dg_ops = { 87177633Sdfr .cl_call = clnt_dg_call, 88177633Sdfr .cl_abort = clnt_dg_abort, 89177633Sdfr .cl_geterr = clnt_dg_geterr, 90177633Sdfr .cl_freeres = clnt_dg_freeres, 91184588Sdfr .cl_close = clnt_dg_close, 92177633Sdfr .cl_destroy = clnt_dg_destroy, 93177633Sdfr .cl_control = clnt_dg_control 94177633Sdfr}; 95177633Sdfr 96177633Sdfrstatic const char mem_err_clnt_dg[] = "clnt_dg_create: out of memory"; 97177633Sdfr 98177633Sdfr/* 99180025Sdfr * A pending RPC request which awaits a reply. Requests which have 100180025Sdfr * received their reply will have cr_xid set to zero and cr_mrep to 101180025Sdfr * the mbuf chain of the reply. 102177633Sdfr */ 103177633Sdfrstruct cu_request { 104177633Sdfr TAILQ_ENTRY(cu_request) cr_link; 105180025Sdfr CLIENT *cr_client; /* owner */ 106177633Sdfr uint32_t cr_xid; /* XID of request */ 107177633Sdfr struct mbuf *cr_mrep; /* reply received by upcall */ 108177633Sdfr int cr_error; /* any error from upcall */ 109184588Sdfr char cr_verf[MAX_AUTH_BYTES]; /* reply verf */ 110177633Sdfr}; 111177633Sdfr 112177633SdfrTAILQ_HEAD(cu_request_list, cu_request); 113177633Sdfr 114177633Sdfr#define MCALL_MSG_SIZE 24 115177633Sdfr 116177633Sdfr/* 117193272Sjhb * This structure is pointed to by the socket buffer's sb_upcallarg 118177633Sdfr * member. It is separate from the client private data to facilitate 119177633Sdfr * multiple clients sharing the same socket. The cs_lock mutex is used 120177633Sdfr * to protect all fields of this structure, the socket's receive 121177633Sdfr * buffer SOCKBUF_LOCK is used to ensure that exactly one of these 122177633Sdfr * structures is installed on the socket. 123177633Sdfr */ 124177633Sdfrstruct cu_socket { 125177633Sdfr struct mtx cs_lock; 126177633Sdfr int cs_refs; /* Count of clients */ 127177633Sdfr struct cu_request_list cs_pending; /* Requests awaiting replies */ 128193437Srmacklem int cs_upcallrefs; /* Refcnt of upcalls in prog.*/ 129177633Sdfr}; 130177633Sdfr 131193437Srmacklemstatic void clnt_dg_upcallsdone(struct socket *, struct cu_socket *); 132193437Srmacklem 133177633Sdfr/* 134177633Sdfr * Private data kept per client handle 135177633Sdfr */ 136177633Sdfrstruct cu_data { 137180025Sdfr int cu_threads; /* # threads in clnt_vc_call */ 138184588Sdfr bool_t cu_closing; /* TRUE if we are closing */ 139184588Sdfr bool_t cu_closed; /* TRUE if we are closed */ 140177633Sdfr struct socket *cu_socket; /* connection socket */ 141177633Sdfr bool_t cu_closeit; /* opened by library */ 142177633Sdfr struct sockaddr_storage cu_raddr; /* remote address */ 143177633Sdfr int cu_rlen; 144177633Sdfr struct timeval cu_wait; /* retransmit interval */ 145177633Sdfr struct timeval cu_total; /* total time for the call */ 146177633Sdfr struct rpc_err cu_error; 147177633Sdfr uint32_t cu_xid; 148177633Sdfr char cu_mcallc[MCALL_MSG_SIZE]; /* marshalled callmsg */ 149177633Sdfr size_t cu_mcalllen; 150177633Sdfr size_t cu_sendsz; /* send size */ 151177633Sdfr size_t cu_recvsz; /* recv size */ 152177633Sdfr int cu_async; 153177633Sdfr int cu_connect; /* Use connect(). */ 154177633Sdfr int cu_connected; /* Have done connect(). */ 155177633Sdfr const char *cu_waitchan; 156177633Sdfr int cu_waitflag; 157184588Sdfr int cu_cwnd; /* congestion window */ 158184588Sdfr int cu_sent; /* number of in-flight RPCs */ 159184588Sdfr bool_t cu_cwnd_wait; 160177633Sdfr}; 161177633Sdfr 162184588Sdfr#define CWNDSCALE 256 163184588Sdfr#define MAXCWND (32 * CWNDSCALE) 164184588Sdfr 165177633Sdfr/* 166177633Sdfr * Connection less client creation returns with client handle parameters. 167177633Sdfr * Default options are set, which the user can change using clnt_control(). 168177633Sdfr * fd should be open and bound. 169177633Sdfr * NB: The rpch->cl_auth is initialized to null authentication. 170177633Sdfr * Caller may wish to set this something more useful. 171177633Sdfr * 172177633Sdfr * sendsz and recvsz are the maximum allowable packet sizes that can be 173177633Sdfr * sent and received. Normally they are the same, but they can be 174177633Sdfr * changed to improve the program efficiency and buffer allocation. 175177633Sdfr * If they are 0, use the transport default. 176177633Sdfr * 177177633Sdfr * If svcaddr is NULL, returns NULL. 178177633Sdfr */ 179177633SdfrCLIENT * 180177633Sdfrclnt_dg_create( 181177633Sdfr struct socket *so, 182177633Sdfr struct sockaddr *svcaddr, /* servers address */ 183177633Sdfr rpcprog_t program, /* program number */ 184177633Sdfr rpcvers_t version, /* version number */ 185177633Sdfr size_t sendsz, /* buffer recv size */ 186177633Sdfr size_t recvsz) /* buffer send size */ 187177633Sdfr{ 188177633Sdfr CLIENT *cl = NULL; /* client handle */ 189177633Sdfr struct cu_data *cu = NULL; /* private data */ 190177633Sdfr struct cu_socket *cs = NULL; 191193272Sjhb struct sockbuf *sb; 192177633Sdfr struct timeval now; 193177633Sdfr struct rpc_msg call_msg; 194177633Sdfr struct __rpc_sockinfo si; 195177633Sdfr XDR xdrs; 196177633Sdfr 197177633Sdfr if (svcaddr == NULL) { 198177633Sdfr rpc_createerr.cf_stat = RPC_UNKNOWNADDR; 199177633Sdfr return (NULL); 200177633Sdfr } 201177633Sdfr 202196503Szec CURVNET_SET(so->so_vnet); 203177633Sdfr if (!__rpc_socket2sockinfo(so, &si)) { 204177633Sdfr rpc_createerr.cf_stat = RPC_TLIERROR; 205177633Sdfr rpc_createerr.cf_error.re_errno = 0; 206196503Szec CURVNET_RESTORE(); 207177633Sdfr return (NULL); 208177633Sdfr } 209196503Szec CURVNET_RESTORE(); 210177633Sdfr 211177633Sdfr /* 212177633Sdfr * Find the receive and the send size 213177633Sdfr */ 214177633Sdfr sendsz = __rpc_get_t_size(si.si_af, si.si_proto, (int)sendsz); 215177633Sdfr recvsz = __rpc_get_t_size(si.si_af, si.si_proto, (int)recvsz); 216177633Sdfr if ((sendsz == 0) || (recvsz == 0)) { 217177633Sdfr rpc_createerr.cf_stat = RPC_TLIERROR; /* XXX */ 218177633Sdfr rpc_createerr.cf_error.re_errno = 0; 219177633Sdfr return (NULL); 220177633Sdfr } 221177633Sdfr 222177633Sdfr cl = mem_alloc(sizeof (CLIENT)); 223177633Sdfr 224177633Sdfr /* 225177633Sdfr * Should be multiple of 4 for XDR. 226177633Sdfr */ 227177633Sdfr sendsz = ((sendsz + 3) / 4) * 4; 228177633Sdfr recvsz = ((recvsz + 3) / 4) * 4; 229177633Sdfr cu = mem_alloc(sizeof (*cu)); 230180025Sdfr cu->cu_threads = 0; 231180025Sdfr cu->cu_closing = FALSE; 232184588Sdfr cu->cu_closed = FALSE; 233177633Sdfr (void) memcpy(&cu->cu_raddr, svcaddr, (size_t)svcaddr->sa_len); 234177633Sdfr cu->cu_rlen = svcaddr->sa_len; 235177633Sdfr /* Other values can also be set through clnt_control() */ 236180025Sdfr cu->cu_wait.tv_sec = 3; /* heuristically chosen */ 237177633Sdfr cu->cu_wait.tv_usec = 0; 238177633Sdfr cu->cu_total.tv_sec = -1; 239177633Sdfr cu->cu_total.tv_usec = -1; 240177633Sdfr cu->cu_sendsz = sendsz; 241177633Sdfr cu->cu_recvsz = recvsz; 242177633Sdfr cu->cu_async = FALSE; 243177633Sdfr cu->cu_connect = FALSE; 244177633Sdfr cu->cu_connected = FALSE; 245177633Sdfr cu->cu_waitchan = "rpcrecv"; 246177633Sdfr cu->cu_waitflag = 0; 247184588Sdfr cu->cu_cwnd = MAXCWND / 2; 248184588Sdfr cu->cu_sent = 0; 249184588Sdfr cu->cu_cwnd_wait = FALSE; 250177633Sdfr (void) getmicrotime(&now); 251177633Sdfr cu->cu_xid = __RPC_GETXID(&now); 252177633Sdfr call_msg.rm_xid = cu->cu_xid; 253177633Sdfr call_msg.rm_call.cb_prog = program; 254177633Sdfr call_msg.rm_call.cb_vers = version; 255177633Sdfr xdrmem_create(&xdrs, cu->cu_mcallc, MCALL_MSG_SIZE, XDR_ENCODE); 256177633Sdfr if (! xdr_callhdr(&xdrs, &call_msg)) { 257177633Sdfr rpc_createerr.cf_stat = RPC_CANTENCODEARGS; /* XXX */ 258177633Sdfr rpc_createerr.cf_error.re_errno = 0; 259177633Sdfr goto err2; 260177633Sdfr } 261177633Sdfr cu->cu_mcalllen = XDR_GETPOS(&xdrs);; 262177633Sdfr 263177633Sdfr /* 264177633Sdfr * By default, closeit is always FALSE. It is users responsibility 265177633Sdfr * to do a close on it, else the user may use clnt_control 266177633Sdfr * to let clnt_destroy do it for him/her. 267177633Sdfr */ 268177633Sdfr cu->cu_closeit = FALSE; 269177633Sdfr cu->cu_socket = so; 270180025Sdfr soreserve(so, 256*1024, 256*1024); 271177633Sdfr 272193272Sjhb sb = &so->so_rcv; 273177633Sdfr SOCKBUF_LOCK(&so->so_rcv); 274177633Sdfrrecheck_socket: 275193272Sjhb if (sb->sb_upcall) { 276193272Sjhb if (sb->sb_upcall != clnt_dg_soupcall) { 277177633Sdfr SOCKBUF_UNLOCK(&so->so_rcv); 278177633Sdfr printf("clnt_dg_create(): socket already has an incompatible upcall\n"); 279177633Sdfr goto err2; 280177633Sdfr } 281193272Sjhb cs = (struct cu_socket *) sb->sb_upcallarg; 282177633Sdfr mtx_lock(&cs->cs_lock); 283177633Sdfr cs->cs_refs++; 284177633Sdfr mtx_unlock(&cs->cs_lock); 285177633Sdfr } else { 286177633Sdfr /* 287177633Sdfr * We are the first on this socket - allocate the 288177633Sdfr * structure and install it in the socket. 289177633Sdfr */ 290193272Sjhb SOCKBUF_UNLOCK(&so->so_rcv); 291177633Sdfr cs = mem_alloc(sizeof(*cs)); 292193272Sjhb SOCKBUF_LOCK(&so->so_rcv); 293193272Sjhb if (sb->sb_upcall) { 294177633Sdfr /* 295177633Sdfr * We have lost a race with some other client. 296177633Sdfr */ 297177633Sdfr mem_free(cs, sizeof(*cs)); 298177633Sdfr goto recheck_socket; 299177633Sdfr } 300177633Sdfr mtx_init(&cs->cs_lock, "cs->cs_lock", NULL, MTX_DEF); 301177633Sdfr cs->cs_refs = 1; 302193437Srmacklem cs->cs_upcallrefs = 0; 303177633Sdfr TAILQ_INIT(&cs->cs_pending); 304193272Sjhb soupcall_set(so, SO_RCV, clnt_dg_soupcall, cs); 305177633Sdfr } 306177633Sdfr SOCKBUF_UNLOCK(&so->so_rcv); 307177633Sdfr 308180025Sdfr cl->cl_refs = 1; 309177633Sdfr cl->cl_ops = &clnt_dg_ops; 310177633Sdfr cl->cl_private = (caddr_t)(void *)cu; 311177633Sdfr cl->cl_auth = authnone_create(); 312177633Sdfr cl->cl_tp = NULL; 313177633Sdfr cl->cl_netid = NULL; 314177633Sdfr return (cl); 315177633Sdfrerr2: 316177633Sdfr if (cl) { 317177633Sdfr mem_free(cl, sizeof (CLIENT)); 318177633Sdfr if (cu) 319177633Sdfr mem_free(cu, sizeof (*cu)); 320177633Sdfr } 321177633Sdfr return (NULL); 322177633Sdfr} 323177633Sdfr 324177633Sdfrstatic enum clnt_stat 325177633Sdfrclnt_dg_call( 326180025Sdfr CLIENT *cl, /* client handle */ 327180025Sdfr struct rpc_callextra *ext, /* call metadata */ 328177633Sdfr rpcproc_t proc, /* procedure number */ 329184588Sdfr struct mbuf *args, /* pointer to args */ 330184588Sdfr struct mbuf **resultsp, /* pointer to results */ 331177633Sdfr struct timeval utimeout) /* seconds to wait before giving up */ 332177633Sdfr{ 333177633Sdfr struct cu_data *cu = (struct cu_data *)cl->cl_private; 334193272Sjhb struct cu_socket *cs; 335184588Sdfr struct rpc_timers *rt; 336180025Sdfr AUTH *auth; 337184588Sdfr struct rpc_err *errp; 338184588Sdfr enum clnt_stat stat; 339177633Sdfr XDR xdrs; 340177633Sdfr struct rpc_msg reply_msg; 341177633Sdfr bool_t ok; 342180025Sdfr int retrans; /* number of re-transmits so far */ 343177633Sdfr int nrefreshes = 2; /* number of times to refresh cred */ 344180025Sdfr struct timeval *tvp; 345180025Sdfr int timeout; 346180025Sdfr int retransmit_time; 347184588Sdfr int next_sendtime, starttime, rtt, time_waited, tv = 0; 348177633Sdfr struct sockaddr *sa; 349177633Sdfr socklen_t salen; 350184588Sdfr uint32_t xid = 0; 351184588Sdfr struct mbuf *mreq = NULL, *results; 352180025Sdfr struct cu_request *cr; 353177633Sdfr int error; 354177633Sdfr 355193272Sjhb cs = cu->cu_socket->so_rcv.sb_upcallarg; 356180025Sdfr cr = malloc(sizeof(struct cu_request), M_RPC, M_WAITOK); 357180025Sdfr 358177633Sdfr mtx_lock(&cs->cs_lock); 359177633Sdfr 360184588Sdfr if (cu->cu_closing || cu->cu_closed) { 361180025Sdfr mtx_unlock(&cs->cs_lock); 362180025Sdfr free(cr, M_RPC); 363180025Sdfr return (RPC_CANTSEND); 364180025Sdfr } 365180025Sdfr cu->cu_threads++; 366177633Sdfr 367184588Sdfr if (ext) { 368180025Sdfr auth = ext->rc_auth; 369184588Sdfr errp = &ext->rc_err; 370184588Sdfr } else { 371180025Sdfr auth = cl->cl_auth; 372184588Sdfr errp = &cu->cu_error; 373184588Sdfr } 374180025Sdfr 375180025Sdfr cr->cr_client = cl; 376180025Sdfr cr->cr_mrep = NULL; 377180025Sdfr cr->cr_error = 0; 378180025Sdfr 379177633Sdfr if (cu->cu_total.tv_usec == -1) { 380180025Sdfr tvp = &utimeout; /* use supplied timeout */ 381177633Sdfr } else { 382180025Sdfr tvp = &cu->cu_total; /* use default timeout */ 383177633Sdfr } 384180025Sdfr if (tvp->tv_sec || tvp->tv_usec) 385180025Sdfr timeout = tvtohz(tvp); 386180025Sdfr else 387180025Sdfr timeout = 0; 388177633Sdfr 389177633Sdfr if (cu->cu_connect && !cu->cu_connected) { 390177633Sdfr mtx_unlock(&cs->cs_lock); 391177633Sdfr error = soconnect(cu->cu_socket, 392177633Sdfr (struct sockaddr *)&cu->cu_raddr, curthread); 393177633Sdfr mtx_lock(&cs->cs_lock); 394177633Sdfr if (error) { 395184588Sdfr errp->re_errno = error; 396184588Sdfr errp->re_status = stat = RPC_CANTSEND; 397177633Sdfr goto out; 398177633Sdfr } 399177633Sdfr cu->cu_connected = 1; 400177633Sdfr } 401177633Sdfr if (cu->cu_connected) { 402177633Sdfr sa = NULL; 403177633Sdfr salen = 0; 404177633Sdfr } else { 405177633Sdfr sa = (struct sockaddr *)&cu->cu_raddr; 406177633Sdfr salen = cu->cu_rlen; 407177633Sdfr } 408180025Sdfr time_waited = 0; 409180025Sdfr retrans = 0; 410184588Sdfr if (ext && ext->rc_timers) { 411184588Sdfr rt = ext->rc_timers; 412184588Sdfr if (!rt->rt_rtxcur) 413184588Sdfr rt->rt_rtxcur = tvtohz(&cu->cu_wait); 414184588Sdfr retransmit_time = next_sendtime = rt->rt_rtxcur; 415184588Sdfr } else { 416184588Sdfr rt = NULL; 417184588Sdfr retransmit_time = next_sendtime = tvtohz(&cu->cu_wait); 418184588Sdfr } 419177633Sdfr 420180025Sdfr starttime = ticks; 421177633Sdfr 422177633Sdfrcall_again: 423177633Sdfr mtx_assert(&cs->cs_lock, MA_OWNED); 424177633Sdfr 425177633Sdfr cu->cu_xid++; 426177633Sdfr xid = cu->cu_xid; 427177633Sdfr 428177633Sdfrsend_again: 429177633Sdfr mtx_unlock(&cs->cs_lock); 430177633Sdfr 431177633Sdfr MGETHDR(mreq, M_WAIT, MT_DATA); 432184588Sdfr KASSERT(cu->cu_mcalllen <= MHLEN, ("RPC header too big")); 433184588Sdfr bcopy(cu->cu_mcallc, mreq->m_data, cu->cu_mcalllen); 434184588Sdfr mreq->m_len = cu->cu_mcalllen; 435177633Sdfr 436177633Sdfr /* 437177633Sdfr * The XID is the first thing in the request. 438177633Sdfr */ 439177633Sdfr *mtod(mreq, uint32_t *) = htonl(xid); 440177633Sdfr 441177633Sdfr xdrmbuf_create(&xdrs, mreq, XDR_ENCODE); 442177633Sdfr 443184588Sdfr if (cu->cu_async == TRUE && args == NULL) 444177633Sdfr goto get_reply; 445177633Sdfr 446177633Sdfr if ((! XDR_PUTINT32(&xdrs, &proc)) || 447184588Sdfr (! AUTH_MARSHALL(auth, xid, &xdrs, 448184588Sdfr m_copym(args, 0, M_COPYALL, M_WAITOK)))) { 449184588Sdfr errp->re_status = stat = RPC_CANTENCODEARGS; 450177633Sdfr mtx_lock(&cs->cs_lock); 451177633Sdfr goto out; 452177633Sdfr } 453184588Sdfr mreq->m_pkthdr.len = m_length(mreq, NULL); 454177633Sdfr 455180025Sdfr cr->cr_xid = xid; 456177633Sdfr mtx_lock(&cs->cs_lock); 457184588Sdfr 458184588Sdfr /* 459184588Sdfr * Try to get a place in the congestion window. 460184588Sdfr */ 461184588Sdfr while (cu->cu_sent >= cu->cu_cwnd) { 462184588Sdfr cu->cu_cwnd_wait = TRUE; 463184588Sdfr error = msleep(&cu->cu_cwnd_wait, &cs->cs_lock, 464184588Sdfr cu->cu_waitflag, "rpccwnd", 0); 465184588Sdfr if (error) { 466184588Sdfr errp->re_errno = error; 467184588Sdfr errp->re_status = stat = RPC_CANTSEND; 468184588Sdfr goto out; 469184588Sdfr } 470184588Sdfr } 471184588Sdfr cu->cu_sent += CWNDSCALE; 472184588Sdfr 473180025Sdfr TAILQ_INSERT_TAIL(&cs->cs_pending, cr, cr_link); 474177633Sdfr mtx_unlock(&cs->cs_lock); 475177633Sdfr 476177633Sdfr /* 477177633Sdfr * sosend consumes mreq. 478177633Sdfr */ 479177633Sdfr error = sosend(cu->cu_socket, sa, NULL, mreq, NULL, 0, curthread); 480177633Sdfr mreq = NULL; 481177633Sdfr 482177633Sdfr /* 483177633Sdfr * sub-optimal code appears here because we have 484177633Sdfr * some clock time to spare while the packets are in flight. 485177633Sdfr * (We assume that this is actually only executed once.) 486177633Sdfr */ 487184588Sdfr reply_msg.acpted_rply.ar_verf.oa_flavor = AUTH_NULL; 488184588Sdfr reply_msg.acpted_rply.ar_verf.oa_base = cr->cr_verf; 489184588Sdfr reply_msg.acpted_rply.ar_verf.oa_length = 0; 490184588Sdfr reply_msg.acpted_rply.ar_results.where = NULL; 491184588Sdfr reply_msg.acpted_rply.ar_results.proc = (xdrproc_t)xdr_void; 492177633Sdfr 493177633Sdfr mtx_lock(&cs->cs_lock); 494177633Sdfr if (error) { 495180025Sdfr TAILQ_REMOVE(&cs->cs_pending, cr, cr_link); 496184588Sdfr errp->re_errno = error; 497184588Sdfr errp->re_status = stat = RPC_CANTSEND; 498184588Sdfr cu->cu_sent -= CWNDSCALE; 499184588Sdfr if (cu->cu_cwnd_wait) { 500184588Sdfr cu->cu_cwnd_wait = FALSE; 501184588Sdfr wakeup(&cu->cu_cwnd_wait); 502184588Sdfr } 503177633Sdfr goto out; 504177633Sdfr } 505177633Sdfr 506177633Sdfr /* 507177633Sdfr * Check to see if we got an upcall while waiting for the 508180025Sdfr * lock. 509177633Sdfr */ 510180025Sdfr if (cr->cr_error) { 511180025Sdfr TAILQ_REMOVE(&cs->cs_pending, cr, cr_link); 512184588Sdfr errp->re_errno = cr->cr_error; 513184588Sdfr errp->re_status = stat = RPC_CANTRECV; 514184588Sdfr cu->cu_sent -= CWNDSCALE; 515184588Sdfr if (cu->cu_cwnd_wait) { 516184588Sdfr cu->cu_cwnd_wait = FALSE; 517184588Sdfr wakeup(&cu->cu_cwnd_wait); 518184588Sdfr } 519177633Sdfr goto out; 520177633Sdfr } 521180025Sdfr if (cr->cr_mrep) { 522180025Sdfr TAILQ_REMOVE(&cs->cs_pending, cr, cr_link); 523184588Sdfr cu->cu_sent -= CWNDSCALE; 524184588Sdfr if (cu->cu_cwnd_wait) { 525184588Sdfr cu->cu_cwnd_wait = FALSE; 526184588Sdfr wakeup(&cu->cu_cwnd_wait); 527184588Sdfr } 528177633Sdfr goto got_reply; 529177633Sdfr } 530177633Sdfr 531177633Sdfr /* 532177633Sdfr * Hack to provide rpc-based message passing 533177633Sdfr */ 534180025Sdfr if (timeout == 0) { 535180025Sdfr TAILQ_REMOVE(&cs->cs_pending, cr, cr_link); 536184588Sdfr errp->re_status = stat = RPC_TIMEDOUT; 537184588Sdfr cu->cu_sent -= CWNDSCALE; 538184588Sdfr if (cu->cu_cwnd_wait) { 539184588Sdfr cu->cu_cwnd_wait = FALSE; 540184588Sdfr wakeup(&cu->cu_cwnd_wait); 541184588Sdfr } 542177633Sdfr goto out; 543177633Sdfr } 544177633Sdfr 545177633Sdfrget_reply: 546177633Sdfr for (;;) { 547177633Sdfr /* Decide how long to wait. */ 548180025Sdfr if (next_sendtime < timeout) 549177633Sdfr tv = next_sendtime; 550180025Sdfr else 551180025Sdfr tv = timeout; 552180025Sdfr tv -= time_waited; 553180025Sdfr 554180025Sdfr if (tv > 0) { 555195245Srmacklem if (cu->cu_closing || cu->cu_closed) { 556180025Sdfr error = 0; 557195245Srmacklem cr->cr_error = ESHUTDOWN; 558195245Srmacklem } else { 559180025Sdfr error = msleep(cr, &cs->cs_lock, 560180025Sdfr cu->cu_waitflag, cu->cu_waitchan, tv); 561195245Srmacklem } 562177633Sdfr } else { 563180025Sdfr error = EWOULDBLOCK; 564177633Sdfr } 565177633Sdfr 566180025Sdfr TAILQ_REMOVE(&cs->cs_pending, cr, cr_link); 567184588Sdfr cu->cu_sent -= CWNDSCALE; 568184588Sdfr if (cu->cu_cwnd_wait) { 569184588Sdfr cu->cu_cwnd_wait = FALSE; 570184588Sdfr wakeup(&cu->cu_cwnd_wait); 571184588Sdfr } 572177633Sdfr 573177633Sdfr if (!error) { 574177633Sdfr /* 575177633Sdfr * We were woken up by the upcall. If the 576177633Sdfr * upcall had a receive error, report that, 577177633Sdfr * otherwise we have a reply. 578177633Sdfr */ 579180025Sdfr if (cr->cr_error) { 580184588Sdfr errp->re_errno = cr->cr_error; 581184588Sdfr errp->re_status = stat = RPC_CANTRECV; 582177633Sdfr goto out; 583177633Sdfr } 584184588Sdfr 585184588Sdfr cu->cu_cwnd += (CWNDSCALE * CWNDSCALE 586184588Sdfr + cu->cu_cwnd / 2) / cu->cu_cwnd; 587184588Sdfr if (cu->cu_cwnd > MAXCWND) 588184588Sdfr cu->cu_cwnd = MAXCWND; 589184588Sdfr 590184588Sdfr if (rt) { 591184588Sdfr /* 592184588Sdfr * Add one to the time since a tick 593184588Sdfr * count of N means that the actual 594184588Sdfr * time taken was somewhere between N 595184588Sdfr * and N+1. 596184588Sdfr */ 597184588Sdfr rtt = ticks - starttime + 1; 598184588Sdfr 599184588Sdfr /* 600184588Sdfr * Update our estimate of the round 601184588Sdfr * trip time using roughly the 602184588Sdfr * algorithm described in RFC 603184588Sdfr * 2988. Given an RTT sample R: 604184588Sdfr * 605184588Sdfr * RTTVAR = (1-beta) * RTTVAR + beta * |SRTT-R| 606184588Sdfr * SRTT = (1-alpha) * SRTT + alpha * R 607184588Sdfr * 608184588Sdfr * where alpha = 0.125 and beta = 0.25. 609184588Sdfr * 610184588Sdfr * The initial retransmit timeout is 611184588Sdfr * SRTT + 4*RTTVAR and doubles on each 612184588Sdfr * retransmision. 613184588Sdfr */ 614184588Sdfr if (rt->rt_srtt == 0) { 615184588Sdfr rt->rt_srtt = rtt; 616184588Sdfr rt->rt_deviate = rtt / 2; 617184588Sdfr } else { 618184588Sdfr int32_t error = rtt - rt->rt_srtt; 619184588Sdfr rt->rt_srtt += error / 8; 620184588Sdfr error = abs(error) - rt->rt_deviate; 621184588Sdfr rt->rt_deviate += error / 4; 622184588Sdfr } 623184588Sdfr rt->rt_rtxcur = rt->rt_srtt + 4*rt->rt_deviate; 624184588Sdfr } 625184588Sdfr 626177633Sdfr break; 627177633Sdfr } 628177633Sdfr 629177633Sdfr /* 630177633Sdfr * The sleep returned an error so our request is still 631177633Sdfr * on the list. If we got EWOULDBLOCK, we may want to 632177633Sdfr * re-send the request. 633177633Sdfr */ 634177633Sdfr if (error != EWOULDBLOCK) { 635184588Sdfr errp->re_errno = error; 636177633Sdfr if (error == EINTR) 637184588Sdfr errp->re_status = stat = RPC_INTR; 638177633Sdfr else 639184588Sdfr errp->re_status = stat = RPC_CANTRECV; 640177633Sdfr goto out; 641177633Sdfr } 642177633Sdfr 643180025Sdfr time_waited = ticks - starttime; 644177633Sdfr 645177633Sdfr /* Check for timeout. */ 646180025Sdfr if (time_waited > timeout) { 647184588Sdfr errp->re_errno = EWOULDBLOCK; 648184588Sdfr errp->re_status = stat = RPC_TIMEDOUT; 649177633Sdfr goto out; 650177633Sdfr } 651177633Sdfr 652177633Sdfr /* Retransmit if necessary. */ 653180025Sdfr if (time_waited >= next_sendtime) { 654184588Sdfr cu->cu_cwnd /= 2; 655184588Sdfr if (cu->cu_cwnd < CWNDSCALE) 656184588Sdfr cu->cu_cwnd = CWNDSCALE; 657180025Sdfr if (ext && ext->rc_feedback) { 658180025Sdfr mtx_unlock(&cs->cs_lock); 659180025Sdfr if (retrans == 0) 660180025Sdfr ext->rc_feedback(FEEDBACK_REXMIT1, 661180025Sdfr proc, ext->rc_feedback_arg); 662180025Sdfr else 663180025Sdfr ext->rc_feedback(FEEDBACK_REXMIT2, 664180025Sdfr proc, ext->rc_feedback_arg); 665180025Sdfr mtx_lock(&cs->cs_lock); 666180025Sdfr } 667184588Sdfr if (cu->cu_closing || cu->cu_closed) { 668184588Sdfr errp->re_errno = ESHUTDOWN; 669184588Sdfr errp->re_status = stat = RPC_CANTRECV; 670180025Sdfr goto out; 671180025Sdfr } 672180025Sdfr retrans++; 673177633Sdfr /* update retransmit_time */ 674180025Sdfr if (retransmit_time < RPC_MAX_BACKOFF * hz) 675180025Sdfr retransmit_time = 2 * retransmit_time; 676180025Sdfr next_sendtime += retransmit_time; 677177633Sdfr goto send_again; 678177633Sdfr } 679180025Sdfr TAILQ_INSERT_TAIL(&cs->cs_pending, cr, cr_link); 680177633Sdfr } 681177633Sdfr 682177633Sdfrgot_reply: 683177633Sdfr /* 684177633Sdfr * Now decode and validate the response. We need to drop the 685177633Sdfr * lock since xdr_replymsg may end up sleeping in malloc. 686177633Sdfr */ 687177633Sdfr mtx_unlock(&cs->cs_lock); 688177633Sdfr 689180025Sdfr if (ext && ext->rc_feedback) 690180025Sdfr ext->rc_feedback(FEEDBACK_OK, proc, ext->rc_feedback_arg); 691180025Sdfr 692180025Sdfr xdrmbuf_create(&xdrs, cr->cr_mrep, XDR_DECODE); 693177633Sdfr ok = xdr_replymsg(&xdrs, &reply_msg); 694180025Sdfr cr->cr_mrep = NULL; 695177633Sdfr 696177633Sdfr if (ok) { 697177633Sdfr if ((reply_msg.rm_reply.rp_stat == MSG_ACCEPTED) && 698184588Sdfr (reply_msg.acpted_rply.ar_stat == SUCCESS)) 699184588Sdfr errp->re_status = stat = RPC_SUCCESS; 700177633Sdfr else 701184588Sdfr stat = _seterr_reply(&reply_msg, &(cu->cu_error)); 702177633Sdfr 703184588Sdfr if (errp->re_status == RPC_SUCCESS) { 704184588Sdfr results = xdrmbuf_getall(&xdrs); 705184588Sdfr if (! AUTH_VALIDATE(auth, xid, 706184588Sdfr &reply_msg.acpted_rply.ar_verf, 707184588Sdfr &results)) { 708184588Sdfr errp->re_status = stat = RPC_AUTHERROR; 709184588Sdfr errp->re_why = AUTH_INVALIDRESP; 710184588Sdfr if (retrans && 711184588Sdfr auth->ah_cred.oa_flavor == RPCSEC_GSS) { 712184588Sdfr /* 713184588Sdfr * If we retransmitted, its 714184588Sdfr * possible that we will 715184588Sdfr * receive a reply for one of 716184588Sdfr * the earlier transmissions 717184588Sdfr * (which will use an older 718184588Sdfr * RPCSEC_GSS sequence 719184588Sdfr * number). In this case, just 720184588Sdfr * go back and listen for a 721184588Sdfr * new reply. We could keep a 722184588Sdfr * record of all the seq 723184588Sdfr * numbers we have transmitted 724184588Sdfr * so far so that we could 725184588Sdfr * accept a reply for any of 726184588Sdfr * them here. 727184588Sdfr */ 728184588Sdfr XDR_DESTROY(&xdrs); 729184588Sdfr mtx_lock(&cs->cs_lock); 730184588Sdfr TAILQ_INSERT_TAIL(&cs->cs_pending, 731184588Sdfr cr, cr_link); 732184588Sdfr cr->cr_mrep = NULL; 733184588Sdfr goto get_reply; 734184588Sdfr } 735184588Sdfr } else { 736184588Sdfr *resultsp = results; 737177633Sdfr } 738177633Sdfr } /* end successful completion */ 739177633Sdfr /* 740177633Sdfr * If unsuccesful AND error is an authentication error 741177633Sdfr * then refresh credentials and try again, else break 742177633Sdfr */ 743184588Sdfr else if (stat == RPC_AUTHERROR) 744177633Sdfr /* maybe our credentials need to be refreshed ... */ 745177633Sdfr if (nrefreshes > 0 && 746184588Sdfr AUTH_REFRESH(auth, &reply_msg)) { 747177633Sdfr nrefreshes--; 748184588Sdfr XDR_DESTROY(&xdrs); 749184588Sdfr mtx_lock(&cs->cs_lock); 750177633Sdfr goto call_again; 751177633Sdfr } 752177633Sdfr /* end of unsuccessful completion */ 753177633Sdfr } /* end of valid reply message */ 754177633Sdfr else { 755184588Sdfr errp->re_status = stat = RPC_CANTDECODERES; 756177633Sdfr 757177633Sdfr } 758184588Sdfr XDR_DESTROY(&xdrs); 759184588Sdfr mtx_lock(&cs->cs_lock); 760177633Sdfrout: 761177633Sdfr mtx_assert(&cs->cs_lock, MA_OWNED); 762177633Sdfr 763177633Sdfr if (mreq) 764177633Sdfr m_freem(mreq); 765180025Sdfr if (cr->cr_mrep) 766180025Sdfr m_freem(cr->cr_mrep); 767177633Sdfr 768180025Sdfr cu->cu_threads--; 769180025Sdfr if (cu->cu_closing) 770180025Sdfr wakeup(cu); 771180025Sdfr 772177633Sdfr mtx_unlock(&cs->cs_lock); 773180025Sdfr 774184588Sdfr if (auth && stat != RPC_SUCCESS) 775184588Sdfr AUTH_VALIDATE(auth, xid, NULL, NULL); 776184588Sdfr 777180025Sdfr free(cr, M_RPC); 778180025Sdfr 779184588Sdfr return (stat); 780177633Sdfr} 781177633Sdfr 782177633Sdfrstatic void 783177633Sdfrclnt_dg_geterr(CLIENT *cl, struct rpc_err *errp) 784177633Sdfr{ 785177633Sdfr struct cu_data *cu = (struct cu_data *)cl->cl_private; 786177633Sdfr 787177633Sdfr *errp = cu->cu_error; 788177633Sdfr} 789177633Sdfr 790177633Sdfrstatic bool_t 791177633Sdfrclnt_dg_freeres(CLIENT *cl, xdrproc_t xdr_res, void *res_ptr) 792177633Sdfr{ 793177633Sdfr XDR xdrs; 794177633Sdfr bool_t dummy; 795177633Sdfr 796177633Sdfr xdrs.x_op = XDR_FREE; 797177633Sdfr dummy = (*xdr_res)(&xdrs, res_ptr); 798177633Sdfr 799177633Sdfr return (dummy); 800177633Sdfr} 801177633Sdfr 802177633Sdfr/*ARGSUSED*/ 803177633Sdfrstatic void 804177633Sdfrclnt_dg_abort(CLIENT *h) 805177633Sdfr{ 806177633Sdfr} 807177633Sdfr 808177633Sdfrstatic bool_t 809177633Sdfrclnt_dg_control(CLIENT *cl, u_int request, void *info) 810177633Sdfr{ 811177633Sdfr struct cu_data *cu = (struct cu_data *)cl->cl_private; 812193272Sjhb struct cu_socket *cs; 813177633Sdfr struct sockaddr *addr; 814177633Sdfr 815193272Sjhb cs = cu->cu_socket->so_rcv.sb_upcallarg; 816177633Sdfr mtx_lock(&cs->cs_lock); 817177633Sdfr 818177633Sdfr switch (request) { 819177633Sdfr case CLSET_FD_CLOSE: 820177633Sdfr cu->cu_closeit = TRUE; 821177633Sdfr mtx_unlock(&cs->cs_lock); 822177633Sdfr return (TRUE); 823177633Sdfr case CLSET_FD_NCLOSE: 824177633Sdfr cu->cu_closeit = FALSE; 825177633Sdfr mtx_unlock(&cs->cs_lock); 826177633Sdfr return (TRUE); 827177633Sdfr } 828177633Sdfr 829177633Sdfr /* for other requests which use info */ 830177633Sdfr if (info == NULL) { 831177633Sdfr mtx_unlock(&cs->cs_lock); 832177633Sdfr return (FALSE); 833177633Sdfr } 834177633Sdfr switch (request) { 835177633Sdfr case CLSET_TIMEOUT: 836177633Sdfr if (time_not_ok((struct timeval *)info)) { 837177633Sdfr mtx_unlock(&cs->cs_lock); 838177633Sdfr return (FALSE); 839177633Sdfr } 840177633Sdfr cu->cu_total = *(struct timeval *)info; 841177633Sdfr break; 842177633Sdfr case CLGET_TIMEOUT: 843177633Sdfr *(struct timeval *)info = cu->cu_total; 844177633Sdfr break; 845177633Sdfr case CLSET_RETRY_TIMEOUT: 846177633Sdfr if (time_not_ok((struct timeval *)info)) { 847177633Sdfr mtx_unlock(&cs->cs_lock); 848177633Sdfr return (FALSE); 849177633Sdfr } 850177633Sdfr cu->cu_wait = *(struct timeval *)info; 851177633Sdfr break; 852177633Sdfr case CLGET_RETRY_TIMEOUT: 853177633Sdfr *(struct timeval *)info = cu->cu_wait; 854177633Sdfr break; 855177633Sdfr case CLGET_SVC_ADDR: 856177633Sdfr /* 857177633Sdfr * Slightly different semantics to userland - we use 858177633Sdfr * sockaddr instead of netbuf. 859177633Sdfr */ 860177633Sdfr memcpy(info, &cu->cu_raddr, cu->cu_raddr.ss_len); 861177633Sdfr break; 862177633Sdfr case CLSET_SVC_ADDR: /* set to new address */ 863177633Sdfr addr = (struct sockaddr *)info; 864177633Sdfr (void) memcpy(&cu->cu_raddr, addr, addr->sa_len); 865177633Sdfr break; 866177633Sdfr case CLGET_XID: 867177633Sdfr *(uint32_t *)info = cu->cu_xid; 868177633Sdfr break; 869177633Sdfr 870177633Sdfr case CLSET_XID: 871177633Sdfr /* This will set the xid of the NEXT call */ 872177633Sdfr /* decrement by 1 as clnt_dg_call() increments once */ 873177633Sdfr cu->cu_xid = *(uint32_t *)info - 1; 874177633Sdfr break; 875177633Sdfr 876177633Sdfr case CLGET_VERS: 877177633Sdfr /* 878177633Sdfr * This RELIES on the information that, in the call body, 879177633Sdfr * the version number field is the fifth field from the 880177633Sdfr * begining of the RPC header. MUST be changed if the 881177633Sdfr * call_struct is changed 882177633Sdfr */ 883177633Sdfr *(uint32_t *)info = 884177633Sdfr ntohl(*(uint32_t *)(void *)(cu->cu_mcallc + 885177633Sdfr 4 * BYTES_PER_XDR_UNIT)); 886177633Sdfr break; 887177633Sdfr 888177633Sdfr case CLSET_VERS: 889177633Sdfr *(uint32_t *)(void *)(cu->cu_mcallc + 4 * BYTES_PER_XDR_UNIT) 890177633Sdfr = htonl(*(uint32_t *)info); 891177633Sdfr break; 892177633Sdfr 893177633Sdfr case CLGET_PROG: 894177633Sdfr /* 895177633Sdfr * This RELIES on the information that, in the call body, 896177633Sdfr * the program number field is the fourth field from the 897177633Sdfr * begining of the RPC header. MUST be changed if the 898177633Sdfr * call_struct is changed 899177633Sdfr */ 900177633Sdfr *(uint32_t *)info = 901177633Sdfr ntohl(*(uint32_t *)(void *)(cu->cu_mcallc + 902177633Sdfr 3 * BYTES_PER_XDR_UNIT)); 903177633Sdfr break; 904177633Sdfr 905177633Sdfr case CLSET_PROG: 906177633Sdfr *(uint32_t *)(void *)(cu->cu_mcallc + 3 * BYTES_PER_XDR_UNIT) 907177633Sdfr = htonl(*(uint32_t *)info); 908177633Sdfr break; 909177633Sdfr case CLSET_ASYNC: 910177633Sdfr cu->cu_async = *(int *)info; 911177633Sdfr break; 912177633Sdfr case CLSET_CONNECT: 913177633Sdfr cu->cu_connect = *(int *)info; 914177633Sdfr break; 915177633Sdfr case CLSET_WAITCHAN: 916184588Sdfr cu->cu_waitchan = (const char *)info; 917177633Sdfr break; 918177633Sdfr case CLGET_WAITCHAN: 919177633Sdfr *(const char **) info = cu->cu_waitchan; 920177633Sdfr break; 921177633Sdfr case CLSET_INTERRUPTIBLE: 922177633Sdfr if (*(int *) info) 923177633Sdfr cu->cu_waitflag = PCATCH; 924177633Sdfr else 925177633Sdfr cu->cu_waitflag = 0; 926177633Sdfr break; 927177633Sdfr case CLGET_INTERRUPTIBLE: 928177633Sdfr if (cu->cu_waitflag) 929177633Sdfr *(int *) info = TRUE; 930177633Sdfr else 931177633Sdfr *(int *) info = FALSE; 932177633Sdfr break; 933177633Sdfr default: 934177633Sdfr mtx_unlock(&cs->cs_lock); 935177633Sdfr return (FALSE); 936177633Sdfr } 937177633Sdfr mtx_unlock(&cs->cs_lock); 938177633Sdfr return (TRUE); 939177633Sdfr} 940177633Sdfr 941177633Sdfrstatic void 942184588Sdfrclnt_dg_close(CLIENT *cl) 943177633Sdfr{ 944177633Sdfr struct cu_data *cu = (struct cu_data *)cl->cl_private; 945193272Sjhb struct cu_socket *cs; 946180025Sdfr struct cu_request *cr; 947177633Sdfr 948193272Sjhb cs = cu->cu_socket->so_rcv.sb_upcallarg; 949180025Sdfr mtx_lock(&cs->cs_lock); 950177633Sdfr 951184588Sdfr if (cu->cu_closed) { 952184588Sdfr mtx_unlock(&cs->cs_lock); 953184588Sdfr return; 954184588Sdfr } 955184588Sdfr 956184588Sdfr if (cu->cu_closing) { 957184588Sdfr while (cu->cu_closing) 958184588Sdfr msleep(cu, &cs->cs_lock, 0, "rpcclose", 0); 959184588Sdfr KASSERT(cu->cu_closed, ("client should be closed")); 960184588Sdfr mtx_unlock(&cs->cs_lock); 961184588Sdfr return; 962184588Sdfr } 963184588Sdfr 964180025Sdfr /* 965180025Sdfr * Abort any pending requests and wait until everyone 966180025Sdfr * has finished with clnt_vc_call. 967180025Sdfr */ 968180025Sdfr cu->cu_closing = TRUE; 969180025Sdfr TAILQ_FOREACH(cr, &cs->cs_pending, cr_link) { 970180025Sdfr if (cr->cr_client == cl) { 971180025Sdfr cr->cr_xid = 0; 972180025Sdfr cr->cr_error = ESHUTDOWN; 973180025Sdfr wakeup(cr); 974180025Sdfr } 975180025Sdfr } 976180025Sdfr 977180025Sdfr while (cu->cu_threads) 978180025Sdfr msleep(cu, &cs->cs_lock, 0, "rpcclose", 0); 979180025Sdfr 980184588Sdfr cu->cu_closing = FALSE; 981184588Sdfr cu->cu_closed = TRUE; 982184588Sdfr 983184588Sdfr mtx_unlock(&cs->cs_lock); 984184588Sdfr wakeup(cu); 985184588Sdfr} 986184588Sdfr 987184588Sdfrstatic void 988184588Sdfrclnt_dg_destroy(CLIENT *cl) 989184588Sdfr{ 990184588Sdfr struct cu_data *cu = (struct cu_data *)cl->cl_private; 991193272Sjhb struct cu_socket *cs; 992184588Sdfr struct socket *so = NULL; 993184588Sdfr bool_t lastsocketref; 994184588Sdfr 995193272Sjhb cs = cu->cu_socket->so_rcv.sb_upcallarg; 996184588Sdfr clnt_dg_close(cl); 997184588Sdfr 998184588Sdfr mtx_lock(&cs->cs_lock); 999184588Sdfr 1000177633Sdfr cs->cs_refs--; 1001177633Sdfr if (cs->cs_refs == 0) { 1002193437Srmacklem mtx_unlock(&cs->cs_lock); 1003180025Sdfr SOCKBUF_LOCK(&cu->cu_socket->so_rcv); 1004193272Sjhb soupcall_clear(cu->cu_socket, SO_RCV); 1005193437Srmacklem clnt_dg_upcallsdone(cu->cu_socket, cs); 1006177633Sdfr SOCKBUF_UNLOCK(&cu->cu_socket->so_rcv); 1007193437Srmacklem mtx_destroy(&cs->cs_lock); 1008177633Sdfr mem_free(cs, sizeof(*cs)); 1009177633Sdfr lastsocketref = TRUE; 1010177633Sdfr } else { 1011177633Sdfr mtx_unlock(&cs->cs_lock); 1012177633Sdfr lastsocketref = FALSE; 1013177633Sdfr } 1014177633Sdfr 1015180025Sdfr if (cu->cu_closeit && lastsocketref) { 1016177633Sdfr so = cu->cu_socket; 1017177633Sdfr cu->cu_socket = NULL; 1018177633Sdfr } 1019177633Sdfr 1020177633Sdfr if (so) 1021177633Sdfr soclose(so); 1022177633Sdfr 1023177633Sdfr if (cl->cl_netid && cl->cl_netid[0]) 1024177633Sdfr mem_free(cl->cl_netid, strlen(cl->cl_netid) +1); 1025177633Sdfr if (cl->cl_tp && cl->cl_tp[0]) 1026177633Sdfr mem_free(cl->cl_tp, strlen(cl->cl_tp) +1); 1027177633Sdfr mem_free(cu, sizeof (*cu)); 1028177633Sdfr mem_free(cl, sizeof (CLIENT)); 1029177633Sdfr} 1030177633Sdfr 1031177633Sdfr/* 1032177633Sdfr * Make sure that the time is not garbage. -1 value is allowed. 1033177633Sdfr */ 1034177633Sdfrstatic bool_t 1035177633Sdfrtime_not_ok(struct timeval *t) 1036177633Sdfr{ 1037177633Sdfr return (t->tv_sec < -1 || t->tv_sec > 100000000 || 1038177633Sdfr t->tv_usec < -1 || t->tv_usec > 1000000); 1039177633Sdfr} 1040177633Sdfr 1041193272Sjhbint 1042177633Sdfrclnt_dg_soupcall(struct socket *so, void *arg, int waitflag) 1043177633Sdfr{ 1044177633Sdfr struct cu_socket *cs = (struct cu_socket *) arg; 1045177633Sdfr struct uio uio; 1046177633Sdfr struct mbuf *m; 1047177633Sdfr struct mbuf *control; 1048177633Sdfr struct cu_request *cr; 1049177633Sdfr int error, rcvflag, foundreq; 1050177633Sdfr uint32_t xid; 1051177633Sdfr 1052193437Srmacklem cs->cs_upcallrefs++; 1053177633Sdfr uio.uio_resid = 1000000000; 1054177633Sdfr uio.uio_td = curthread; 1055177633Sdfr do { 1056193272Sjhb SOCKBUF_UNLOCK(&so->so_rcv); 1057177633Sdfr m = NULL; 1058177633Sdfr control = NULL; 1059177633Sdfr rcvflag = MSG_DONTWAIT; 1060177633Sdfr error = soreceive(so, NULL, &uio, &m, &control, &rcvflag); 1061177633Sdfr if (control) 1062177633Sdfr m_freem(control); 1063193272Sjhb SOCKBUF_LOCK(&so->so_rcv); 1064177633Sdfr 1065177633Sdfr if (error == EWOULDBLOCK) 1066177633Sdfr break; 1067177633Sdfr 1068177633Sdfr /* 1069177633Sdfr * If there was an error, wake up all pending 1070177633Sdfr * requests. 1071177633Sdfr */ 1072177633Sdfr if (error) { 1073177633Sdfr mtx_lock(&cs->cs_lock); 1074177633Sdfr TAILQ_FOREACH(cr, &cs->cs_pending, cr_link) { 1075180025Sdfr cr->cr_xid = 0; 1076177633Sdfr cr->cr_error = error; 1077177633Sdfr wakeup(cr); 1078177633Sdfr } 1079177633Sdfr mtx_unlock(&cs->cs_lock); 1080177633Sdfr break; 1081177633Sdfr } 1082177633Sdfr 1083177633Sdfr /* 1084177633Sdfr * The XID is in the first uint32_t of the reply. 1085177633Sdfr */ 1086184588Sdfr if (m->m_len < sizeof(xid)) 1087184588Sdfr m = m_pullup(m, sizeof(xid)); 1088177633Sdfr if (!m) 1089180025Sdfr /* 1090180025Sdfr * Should never happen. 1091180025Sdfr */ 1092180025Sdfr continue; 1093180025Sdfr 1094177633Sdfr xid = ntohl(*mtod(m, uint32_t *)); 1095177633Sdfr 1096177633Sdfr /* 1097177633Sdfr * Attempt to match this reply with a pending request. 1098177633Sdfr */ 1099177633Sdfr mtx_lock(&cs->cs_lock); 1100177633Sdfr foundreq = 0; 1101177633Sdfr TAILQ_FOREACH(cr, &cs->cs_pending, cr_link) { 1102177633Sdfr if (cr->cr_xid == xid) { 1103177633Sdfr /* 1104180025Sdfr * This one matches. We leave the 1105177633Sdfr * reply mbuf in cr->cr_mrep. Set the 1106180025Sdfr * XID to zero so that we will ignore 1107180025Sdfr * any duplicated replies that arrive 1108180025Sdfr * before clnt_dg_call removes it from 1109180025Sdfr * the queue. 1110177633Sdfr */ 1111177633Sdfr cr->cr_xid = 0; 1112177633Sdfr cr->cr_mrep = m; 1113177633Sdfr cr->cr_error = 0; 1114177633Sdfr foundreq = 1; 1115177633Sdfr wakeup(cr); 1116177633Sdfr break; 1117177633Sdfr } 1118177633Sdfr } 1119177633Sdfr mtx_unlock(&cs->cs_lock); 1120177633Sdfr 1121177633Sdfr /* 1122177633Sdfr * If we didn't find the matching request, just drop 1123177633Sdfr * it - its probably a repeated reply. 1124177633Sdfr */ 1125177633Sdfr if (!foundreq) 1126177633Sdfr m_freem(m); 1127177633Sdfr } while (m); 1128193437Srmacklem cs->cs_upcallrefs--; 1129193437Srmacklem if (cs->cs_upcallrefs < 0) 1130193437Srmacklem panic("rpcdg upcall refcnt"); 1131193437Srmacklem if (cs->cs_upcallrefs == 0) 1132193437Srmacklem wakeup(&cs->cs_upcallrefs); 1133193272Sjhb return (SU_OK); 1134177633Sdfr} 1135177633Sdfr 1136193437Srmacklem/* 1137193437Srmacklem * Wait for all upcalls in progress to complete. 1138193437Srmacklem */ 1139193437Srmacklemstatic void 1140193437Srmacklemclnt_dg_upcallsdone(struct socket *so, struct cu_socket *cs) 1141193437Srmacklem{ 1142193437Srmacklem 1143193437Srmacklem SOCKBUF_LOCK_ASSERT(&so->so_rcv); 1144193437Srmacklem 1145193437Srmacklem while (cs->cs_upcallrefs > 0) 1146193437Srmacklem (void) msleep(&cs->cs_upcallrefs, SOCKBUF_MTX(&so->so_rcv), 0, 1147193437Srmacklem "rpcdgup", 0); 1148193437Srmacklem} 1149