svc.c revision 193649
1177633Sdfr/* $NetBSD: svc.c,v 1.21 2000/07/06 03:10:35 christos 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#if defined(LIBC_SCCS) && !defined(lint) 33177633Sdfrstatic char *sccsid2 = "@(#)svc.c 1.44 88/02/08 Copyr 1984 Sun Micro"; 34177633Sdfrstatic char *sccsid = "@(#)svc.c 2.4 88/08/11 4.0 RPCSRC"; 35177633Sdfr#endif 36177633Sdfr#include <sys/cdefs.h> 37177633Sdfr__FBSDID("$FreeBSD: head/sys/rpc/svc.c 193649 2009-06-07 20:38:41Z rmacklem $"); 38177633Sdfr 39177633Sdfr/* 40177633Sdfr * svc.c, Server-side remote procedure call interface. 41177633Sdfr * 42177633Sdfr * There are two sets of procedures here. The xprt routines are 43177633Sdfr * for handling transport handles. The svc routines handle the 44177633Sdfr * list of service routines. 45177633Sdfr * 46177633Sdfr * Copyright (C) 1984, Sun Microsystems, Inc. 47177633Sdfr */ 48177633Sdfr 49177633Sdfr#include <sys/param.h> 50177633Sdfr#include <sys/lock.h> 51177633Sdfr#include <sys/kernel.h> 52184588Sdfr#include <sys/kthread.h> 53177633Sdfr#include <sys/malloc.h> 54184588Sdfr#include <sys/mbuf.h> 55177633Sdfr#include <sys/mutex.h> 56184588Sdfr#include <sys/proc.h> 57177633Sdfr#include <sys/queue.h> 58184588Sdfr#include <sys/socketvar.h> 59177633Sdfr#include <sys/systm.h> 60177633Sdfr#include <sys/ucred.h> 61177633Sdfr 62177633Sdfr#include <rpc/rpc.h> 63177633Sdfr#include <rpc/rpcb_clnt.h> 64184588Sdfr#include <rpc/replay.h> 65177633Sdfr 66177685Sdfr#include <rpc/rpc_com.h> 67177633Sdfr 68177633Sdfr#define SVC_VERSQUIET 0x0001 /* keep quiet about vers mismatch */ 69184588Sdfr#define version_keepquiet(xp) (SVC_EXT(xp)->xp_flags & SVC_VERSQUIET) 70177633Sdfr 71177633Sdfrstatic struct svc_callout *svc_find(SVCPOOL *pool, rpcprog_t, rpcvers_t, 72177633Sdfr char *); 73184588Sdfrstatic void svc_new_thread(SVCPOOL *pool); 74184588Sdfrstatic void xprt_unregister_locked(SVCXPRT *xprt); 75177633Sdfr 76177633Sdfr/* *************** SVCXPRT related stuff **************** */ 77177633Sdfr 78184588Sdfrstatic int svcpool_minthread_sysctl(SYSCTL_HANDLER_ARGS); 79184588Sdfrstatic int svcpool_maxthread_sysctl(SYSCTL_HANDLER_ARGS); 80184588Sdfr 81177633SdfrSVCPOOL* 82184588Sdfrsvcpool_create(const char *name, struct sysctl_oid_list *sysctl_base) 83177633Sdfr{ 84177633Sdfr SVCPOOL *pool; 85177633Sdfr 86177633Sdfr pool = malloc(sizeof(SVCPOOL), M_RPC, M_WAITOK|M_ZERO); 87177633Sdfr 88177633Sdfr mtx_init(&pool->sp_lock, "sp_lock", NULL, MTX_DEF); 89184588Sdfr pool->sp_name = name; 90184588Sdfr pool->sp_state = SVCPOOL_INIT; 91184588Sdfr pool->sp_proc = NULL; 92177633Sdfr TAILQ_INIT(&pool->sp_xlist); 93177633Sdfr TAILQ_INIT(&pool->sp_active); 94177633Sdfr TAILQ_INIT(&pool->sp_callouts); 95184588Sdfr LIST_INIT(&pool->sp_threads); 96184588Sdfr LIST_INIT(&pool->sp_idlethreads); 97184588Sdfr pool->sp_minthreads = 1; 98184588Sdfr pool->sp_maxthreads = 1; 99184588Sdfr pool->sp_threadcount = 0; 100177633Sdfr 101184588Sdfr /* 102184588Sdfr * Don't use more than a quarter of mbuf clusters or more than 103184588Sdfr * 45Mb buffering requests. 104184588Sdfr */ 105184588Sdfr pool->sp_space_high = nmbclusters * MCLBYTES / 4; 106184588Sdfr if (pool->sp_space_high > 45 << 20) 107184588Sdfr pool->sp_space_high = 45 << 20; 108184588Sdfr pool->sp_space_low = 2 * pool->sp_space_high / 3; 109184588Sdfr 110184588Sdfr sysctl_ctx_init(&pool->sp_sysctl); 111184588Sdfr if (sysctl_base) { 112184588Sdfr SYSCTL_ADD_PROC(&pool->sp_sysctl, sysctl_base, OID_AUTO, 113184588Sdfr "minthreads", CTLTYPE_INT | CTLFLAG_RW, 114184588Sdfr pool, 0, svcpool_minthread_sysctl, "I", ""); 115184588Sdfr SYSCTL_ADD_PROC(&pool->sp_sysctl, sysctl_base, OID_AUTO, 116184588Sdfr "maxthreads", CTLTYPE_INT | CTLFLAG_RW, 117184588Sdfr pool, 0, svcpool_maxthread_sysctl, "I", ""); 118184588Sdfr SYSCTL_ADD_INT(&pool->sp_sysctl, sysctl_base, OID_AUTO, 119184588Sdfr "threads", CTLFLAG_RD, &pool->sp_threadcount, 0, ""); 120184588Sdfr 121184588Sdfr SYSCTL_ADD_UINT(&pool->sp_sysctl, sysctl_base, OID_AUTO, 122184588Sdfr "request_space_used", CTLFLAG_RD, 123184588Sdfr &pool->sp_space_used, 0, 124184588Sdfr "Space in parsed but not handled requests."); 125184588Sdfr 126184588Sdfr SYSCTL_ADD_UINT(&pool->sp_sysctl, sysctl_base, OID_AUTO, 127184588Sdfr "request_space_used_highest", CTLFLAG_RD, 128184588Sdfr &pool->sp_space_used_highest, 0, 129184588Sdfr "Highest space used since reboot."); 130184588Sdfr 131184588Sdfr SYSCTL_ADD_UINT(&pool->sp_sysctl, sysctl_base, OID_AUTO, 132184588Sdfr "request_space_high", CTLFLAG_RW, 133184588Sdfr &pool->sp_space_high, 0, 134184588Sdfr "Maximum space in parsed but not handled requests."); 135184588Sdfr 136184588Sdfr SYSCTL_ADD_UINT(&pool->sp_sysctl, sysctl_base, OID_AUTO, 137184588Sdfr "request_space_low", CTLFLAG_RW, 138184588Sdfr &pool->sp_space_low, 0, 139184588Sdfr "Low water mark for request space."); 140184588Sdfr 141184588Sdfr SYSCTL_ADD_UINT(&pool->sp_sysctl, sysctl_base, OID_AUTO, 142184588Sdfr "request_space_throttled", CTLFLAG_RD, 143184588Sdfr &pool->sp_space_throttled, 0, 144184588Sdfr "Whether nfs requests are currently throttled"); 145184588Sdfr 146184588Sdfr SYSCTL_ADD_UINT(&pool->sp_sysctl, sysctl_base, OID_AUTO, 147184588Sdfr "request_space_throttle_count", CTLFLAG_RD, 148184588Sdfr &pool->sp_space_throttle_count, 0, 149184588Sdfr "Count of times throttling based on request space has occurred"); 150184588Sdfr } 151184588Sdfr 152177633Sdfr return pool; 153177633Sdfr} 154177633Sdfr 155177633Sdfrvoid 156177633Sdfrsvcpool_destroy(SVCPOOL *pool) 157177633Sdfr{ 158184588Sdfr SVCXPRT *xprt, *nxprt; 159177633Sdfr struct svc_callout *s; 160184588Sdfr struct svcxprt_list cleanup; 161177633Sdfr 162184588Sdfr TAILQ_INIT(&cleanup); 163177633Sdfr mtx_lock(&pool->sp_lock); 164177633Sdfr 165177633Sdfr while (TAILQ_FIRST(&pool->sp_xlist)) { 166177633Sdfr xprt = TAILQ_FIRST(&pool->sp_xlist); 167184588Sdfr xprt_unregister_locked(xprt); 168184588Sdfr TAILQ_INSERT_TAIL(&cleanup, xprt, xp_link); 169177633Sdfr } 170177633Sdfr 171177633Sdfr while (TAILQ_FIRST(&pool->sp_callouts)) { 172177633Sdfr s = TAILQ_FIRST(&pool->sp_callouts); 173177633Sdfr mtx_unlock(&pool->sp_lock); 174177633Sdfr svc_unreg(pool, s->sc_prog, s->sc_vers); 175177633Sdfr mtx_lock(&pool->sp_lock); 176177633Sdfr } 177193603Srmacklem mtx_unlock(&pool->sp_lock); 178177633Sdfr 179184588Sdfr TAILQ_FOREACH_SAFE(xprt, &cleanup, xp_link, nxprt) { 180184588Sdfr SVC_RELEASE(xprt); 181184588Sdfr } 182184588Sdfr 183193436Srmacklem mtx_destroy(&pool->sp_lock); 184193436Srmacklem 185184588Sdfr if (pool->sp_rcache) 186184588Sdfr replay_freecache(pool->sp_rcache); 187184588Sdfr 188184588Sdfr sysctl_ctx_free(&pool->sp_sysctl); 189177633Sdfr free(pool, M_RPC); 190177633Sdfr} 191177633Sdfr 192184588Sdfrstatic bool_t 193184588Sdfrsvcpool_active(SVCPOOL *pool) 194184588Sdfr{ 195184588Sdfr enum svcpool_state state = pool->sp_state; 196184588Sdfr 197184588Sdfr if (state == SVCPOOL_INIT || state == SVCPOOL_CLOSING) 198184588Sdfr return (FALSE); 199184588Sdfr return (TRUE); 200184588Sdfr} 201184588Sdfr 202177633Sdfr/* 203184588Sdfr * Sysctl handler to set the minimum thread count on a pool 204184588Sdfr */ 205184588Sdfrstatic int 206184588Sdfrsvcpool_minthread_sysctl(SYSCTL_HANDLER_ARGS) 207184588Sdfr{ 208184588Sdfr SVCPOOL *pool; 209184588Sdfr int newminthreads, error, n; 210184588Sdfr 211184588Sdfr pool = oidp->oid_arg1; 212184588Sdfr newminthreads = pool->sp_minthreads; 213184588Sdfr error = sysctl_handle_int(oidp, &newminthreads, 0, req); 214184588Sdfr if (error == 0 && newminthreads != pool->sp_minthreads) { 215184588Sdfr if (newminthreads > pool->sp_maxthreads) 216184588Sdfr return (EINVAL); 217184588Sdfr mtx_lock(&pool->sp_lock); 218184588Sdfr if (newminthreads > pool->sp_minthreads 219184588Sdfr && svcpool_active(pool)) { 220184588Sdfr /* 221184588Sdfr * If the pool is running and we are 222184588Sdfr * increasing, create some more threads now. 223184588Sdfr */ 224184588Sdfr n = newminthreads - pool->sp_threadcount; 225184588Sdfr if (n > 0) { 226184588Sdfr mtx_unlock(&pool->sp_lock); 227184588Sdfr while (n--) 228184588Sdfr svc_new_thread(pool); 229184588Sdfr mtx_lock(&pool->sp_lock); 230184588Sdfr } 231184588Sdfr } 232184588Sdfr pool->sp_minthreads = newminthreads; 233184588Sdfr mtx_unlock(&pool->sp_lock); 234184588Sdfr } 235184588Sdfr return (error); 236184588Sdfr} 237184588Sdfr 238184588Sdfr/* 239184588Sdfr * Sysctl handler to set the maximum thread count on a pool 240184588Sdfr */ 241184588Sdfrstatic int 242184588Sdfrsvcpool_maxthread_sysctl(SYSCTL_HANDLER_ARGS) 243184588Sdfr{ 244184588Sdfr SVCPOOL *pool; 245184588Sdfr SVCTHREAD *st; 246184588Sdfr int newmaxthreads, error; 247184588Sdfr 248184588Sdfr pool = oidp->oid_arg1; 249184588Sdfr newmaxthreads = pool->sp_maxthreads; 250184588Sdfr error = sysctl_handle_int(oidp, &newmaxthreads, 0, req); 251184588Sdfr if (error == 0 && newmaxthreads != pool->sp_maxthreads) { 252184588Sdfr if (newmaxthreads < pool->sp_minthreads) 253184588Sdfr return (EINVAL); 254184588Sdfr mtx_lock(&pool->sp_lock); 255184588Sdfr if (newmaxthreads < pool->sp_maxthreads 256184588Sdfr && svcpool_active(pool)) { 257184588Sdfr /* 258184588Sdfr * If the pool is running and we are 259184588Sdfr * decreasing, wake up some idle threads to 260184588Sdfr * encourage them to exit. 261184588Sdfr */ 262184588Sdfr LIST_FOREACH(st, &pool->sp_idlethreads, st_ilink) 263184588Sdfr cv_signal(&st->st_cond); 264184588Sdfr } 265184588Sdfr pool->sp_maxthreads = newmaxthreads; 266184588Sdfr mtx_unlock(&pool->sp_lock); 267184588Sdfr } 268184588Sdfr return (error); 269184588Sdfr} 270184588Sdfr 271184588Sdfr/* 272177633Sdfr * Activate a transport handle. 273177633Sdfr */ 274177633Sdfrvoid 275177633Sdfrxprt_register(SVCXPRT *xprt) 276177633Sdfr{ 277177633Sdfr SVCPOOL *pool = xprt->xp_pool; 278177633Sdfr 279177633Sdfr mtx_lock(&pool->sp_lock); 280177633Sdfr xprt->xp_registered = TRUE; 281177633Sdfr xprt->xp_active = FALSE; 282177633Sdfr TAILQ_INSERT_TAIL(&pool->sp_xlist, xprt, xp_link); 283177633Sdfr mtx_unlock(&pool->sp_lock); 284177633Sdfr} 285177633Sdfr 286177633Sdfr/* 287184588Sdfr * De-activate a transport handle. Note: the locked version doesn't 288184588Sdfr * release the transport - caller must do that after dropping the pool 289184588Sdfr * lock. 290177633Sdfr */ 291177633Sdfrstatic void 292184588Sdfrxprt_unregister_locked(SVCXPRT *xprt) 293177633Sdfr{ 294177633Sdfr SVCPOOL *pool = xprt->xp_pool; 295177633Sdfr 296193649Srmacklem KASSERT(xprt->xp_registered == TRUE, 297193649Srmacklem ("xprt_unregister_locked: not registered")); 298177633Sdfr if (xprt->xp_active) { 299177633Sdfr TAILQ_REMOVE(&pool->sp_active, xprt, xp_alink); 300177633Sdfr xprt->xp_active = FALSE; 301177633Sdfr } 302177633Sdfr TAILQ_REMOVE(&pool->sp_xlist, xprt, xp_link); 303177633Sdfr xprt->xp_registered = FALSE; 304184588Sdfr} 305177633Sdfr 306184588Sdfrvoid 307184588Sdfrxprt_unregister(SVCXPRT *xprt) 308184588Sdfr{ 309184588Sdfr SVCPOOL *pool = xprt->xp_pool; 310184588Sdfr 311184588Sdfr mtx_lock(&pool->sp_lock); 312193649Srmacklem if (xprt->xp_registered == FALSE) { 313193649Srmacklem /* Already unregistered by another thread */ 314193649Srmacklem mtx_unlock(&pool->sp_lock); 315193649Srmacklem return; 316193649Srmacklem } 317184588Sdfr xprt_unregister_locked(xprt); 318184588Sdfr mtx_unlock(&pool->sp_lock); 319184588Sdfr 320184588Sdfr SVC_RELEASE(xprt); 321177633Sdfr} 322177633Sdfr 323184588Sdfrstatic void 324184588Sdfrxprt_assignthread(SVCXPRT *xprt) 325184588Sdfr{ 326184588Sdfr SVCPOOL *pool = xprt->xp_pool; 327184588Sdfr SVCTHREAD *st; 328184588Sdfr 329184588Sdfr /* 330184588Sdfr * Attempt to assign a service thread to this 331184588Sdfr * transport. 332184588Sdfr */ 333184588Sdfr LIST_FOREACH(st, &pool->sp_idlethreads, st_ilink) { 334184588Sdfr if (st->st_xprt == NULL && STAILQ_EMPTY(&st->st_reqs)) 335184588Sdfr break; 336184588Sdfr } 337184588Sdfr if (st) { 338184588Sdfr SVC_ACQUIRE(xprt); 339184588Sdfr xprt->xp_thread = st; 340184588Sdfr st->st_xprt = xprt; 341184588Sdfr cv_signal(&st->st_cond); 342184588Sdfr } else { 343184588Sdfr /* 344184588Sdfr * See if we can create a new thread. The 345184588Sdfr * actual thread creation happens in 346184588Sdfr * svc_run_internal because our locking state 347184588Sdfr * is poorly defined (we are typically called 348184588Sdfr * from a socket upcall). Don't create more 349184588Sdfr * than one thread per second. 350184588Sdfr */ 351184588Sdfr if (pool->sp_state == SVCPOOL_ACTIVE 352184588Sdfr && pool->sp_lastcreatetime < time_uptime 353184588Sdfr && pool->sp_threadcount < pool->sp_maxthreads) { 354184588Sdfr pool->sp_state = SVCPOOL_THREADWANTED; 355184588Sdfr } 356184588Sdfr } 357184588Sdfr} 358184588Sdfr 359177633Sdfrvoid 360177633Sdfrxprt_active(SVCXPRT *xprt) 361177633Sdfr{ 362177633Sdfr SVCPOOL *pool = xprt->xp_pool; 363177633Sdfr 364193436Srmacklem mtx_lock(&pool->sp_lock); 365193436Srmacklem 366184588Sdfr if (!xprt->xp_registered) { 367184588Sdfr /* 368184588Sdfr * Race with xprt_unregister - we lose. 369184588Sdfr */ 370193436Srmacklem mtx_unlock(&pool->sp_lock); 371184588Sdfr return; 372184588Sdfr } 373184588Sdfr 374177633Sdfr if (!xprt->xp_active) { 375177633Sdfr TAILQ_INSERT_TAIL(&pool->sp_active, xprt, xp_alink); 376177633Sdfr xprt->xp_active = TRUE; 377184588Sdfr xprt_assignthread(xprt); 378177633Sdfr } 379177633Sdfr 380177633Sdfr mtx_unlock(&pool->sp_lock); 381177633Sdfr} 382177633Sdfr 383177633Sdfrvoid 384184588Sdfrxprt_inactive_locked(SVCXPRT *xprt) 385177633Sdfr{ 386177633Sdfr SVCPOOL *pool = xprt->xp_pool; 387177633Sdfr 388177633Sdfr if (xprt->xp_active) { 389177633Sdfr TAILQ_REMOVE(&pool->sp_active, xprt, xp_alink); 390177633Sdfr xprt->xp_active = FALSE; 391177633Sdfr } 392184588Sdfr} 393177633Sdfr 394184588Sdfrvoid 395184588Sdfrxprt_inactive(SVCXPRT *xprt) 396184588Sdfr{ 397184588Sdfr SVCPOOL *pool = xprt->xp_pool; 398184588Sdfr 399184588Sdfr mtx_lock(&pool->sp_lock); 400184588Sdfr xprt_inactive_locked(xprt); 401177633Sdfr mtx_unlock(&pool->sp_lock); 402177633Sdfr} 403177633Sdfr 404177633Sdfr/* 405177633Sdfr * Add a service program to the callout list. 406177633Sdfr * The dispatch routine will be called when a rpc request for this 407177633Sdfr * program number comes in. 408177633Sdfr */ 409177633Sdfrbool_t 410177633Sdfrsvc_reg(SVCXPRT *xprt, const rpcprog_t prog, const rpcvers_t vers, 411177633Sdfr void (*dispatch)(struct svc_req *, SVCXPRT *), 412177633Sdfr const struct netconfig *nconf) 413177633Sdfr{ 414177633Sdfr SVCPOOL *pool = xprt->xp_pool; 415177633Sdfr struct svc_callout *s; 416177633Sdfr char *netid = NULL; 417177633Sdfr int flag = 0; 418177633Sdfr 419177633Sdfr/* VARIABLES PROTECTED BY svc_lock: s, svc_head */ 420177633Sdfr 421177633Sdfr if (xprt->xp_netid) { 422177633Sdfr netid = strdup(xprt->xp_netid, M_RPC); 423177633Sdfr flag = 1; 424177633Sdfr } else if (nconf && nconf->nc_netid) { 425177633Sdfr netid = strdup(nconf->nc_netid, M_RPC); 426177633Sdfr flag = 1; 427177633Sdfr } /* must have been created with svc_raw_create */ 428177633Sdfr if ((netid == NULL) && (flag == 1)) { 429177633Sdfr return (FALSE); 430177633Sdfr } 431177633Sdfr 432177633Sdfr mtx_lock(&pool->sp_lock); 433177633Sdfr if ((s = svc_find(pool, prog, vers, netid)) != NULL) { 434177633Sdfr if (netid) 435177633Sdfr free(netid, M_RPC); 436177633Sdfr if (s->sc_dispatch == dispatch) 437177633Sdfr goto rpcb_it; /* he is registering another xptr */ 438177633Sdfr mtx_unlock(&pool->sp_lock); 439177633Sdfr return (FALSE); 440177633Sdfr } 441177633Sdfr s = malloc(sizeof (struct svc_callout), M_RPC, M_NOWAIT); 442177633Sdfr if (s == NULL) { 443177633Sdfr if (netid) 444177633Sdfr free(netid, M_RPC); 445177633Sdfr mtx_unlock(&pool->sp_lock); 446177633Sdfr return (FALSE); 447177633Sdfr } 448177633Sdfr 449177633Sdfr s->sc_prog = prog; 450177633Sdfr s->sc_vers = vers; 451177633Sdfr s->sc_dispatch = dispatch; 452177633Sdfr s->sc_netid = netid; 453177633Sdfr TAILQ_INSERT_TAIL(&pool->sp_callouts, s, sc_link); 454177633Sdfr 455177633Sdfr if ((xprt->xp_netid == NULL) && (flag == 1) && netid) 456177633Sdfr ((SVCXPRT *) xprt)->xp_netid = strdup(netid, M_RPC); 457177633Sdfr 458177633Sdfrrpcb_it: 459177633Sdfr mtx_unlock(&pool->sp_lock); 460177633Sdfr /* now register the information with the local binder service */ 461177633Sdfr if (nconf) { 462177633Sdfr bool_t dummy; 463177633Sdfr struct netconfig tnc; 464184588Sdfr struct netbuf nb; 465177633Sdfr tnc = *nconf; 466184588Sdfr nb.buf = &xprt->xp_ltaddr; 467184588Sdfr nb.len = xprt->xp_ltaddr.ss_len; 468184588Sdfr dummy = rpcb_set(prog, vers, &tnc, &nb); 469177633Sdfr return (dummy); 470177633Sdfr } 471177633Sdfr return (TRUE); 472177633Sdfr} 473177633Sdfr 474177633Sdfr/* 475177633Sdfr * Remove a service program from the callout list. 476177633Sdfr */ 477177633Sdfrvoid 478177633Sdfrsvc_unreg(SVCPOOL *pool, const rpcprog_t prog, const rpcvers_t vers) 479177633Sdfr{ 480177633Sdfr struct svc_callout *s; 481177633Sdfr 482177633Sdfr /* unregister the information anyway */ 483177633Sdfr (void) rpcb_unset(prog, vers, NULL); 484177633Sdfr mtx_lock(&pool->sp_lock); 485177633Sdfr while ((s = svc_find(pool, prog, vers, NULL)) != NULL) { 486177633Sdfr TAILQ_REMOVE(&pool->sp_callouts, s, sc_link); 487177633Sdfr if (s->sc_netid) 488177633Sdfr mem_free(s->sc_netid, sizeof (s->sc_netid) + 1); 489177633Sdfr mem_free(s, sizeof (struct svc_callout)); 490177633Sdfr } 491177633Sdfr mtx_unlock(&pool->sp_lock); 492177633Sdfr} 493177633Sdfr 494177633Sdfr/* ********************** CALLOUT list related stuff ************* */ 495177633Sdfr 496177633Sdfr/* 497177633Sdfr * Search the callout list for a program number, return the callout 498177633Sdfr * struct. 499177633Sdfr */ 500177633Sdfrstatic struct svc_callout * 501177633Sdfrsvc_find(SVCPOOL *pool, rpcprog_t prog, rpcvers_t vers, char *netid) 502177633Sdfr{ 503177633Sdfr struct svc_callout *s; 504177633Sdfr 505177633Sdfr mtx_assert(&pool->sp_lock, MA_OWNED); 506177633Sdfr TAILQ_FOREACH(s, &pool->sp_callouts, sc_link) { 507177633Sdfr if (s->sc_prog == prog && s->sc_vers == vers 508177633Sdfr && (netid == NULL || s->sc_netid == NULL || 509177633Sdfr strcmp(netid, s->sc_netid) == 0)) 510177633Sdfr break; 511177633Sdfr } 512177633Sdfr 513177633Sdfr return (s); 514177633Sdfr} 515177633Sdfr 516177633Sdfr/* ******************* REPLY GENERATION ROUTINES ************ */ 517177633Sdfr 518184588Sdfrstatic bool_t 519184588Sdfrsvc_sendreply_common(struct svc_req *rqstp, struct rpc_msg *rply, 520184588Sdfr struct mbuf *body) 521184588Sdfr{ 522184588Sdfr SVCXPRT *xprt = rqstp->rq_xprt; 523184588Sdfr bool_t ok; 524184588Sdfr 525184588Sdfr if (rqstp->rq_args) { 526184588Sdfr m_freem(rqstp->rq_args); 527184588Sdfr rqstp->rq_args = NULL; 528184588Sdfr } 529184588Sdfr 530184588Sdfr if (xprt->xp_pool->sp_rcache) 531184588Sdfr replay_setreply(xprt->xp_pool->sp_rcache, 532184588Sdfr rply, svc_getrpccaller(rqstp), body); 533184588Sdfr 534184588Sdfr if (!SVCAUTH_WRAP(&rqstp->rq_auth, &body)) 535184588Sdfr return (FALSE); 536184588Sdfr 537184588Sdfr ok = SVC_REPLY(xprt, rply, rqstp->rq_addr, body); 538184588Sdfr if (rqstp->rq_addr) { 539184588Sdfr free(rqstp->rq_addr, M_SONAME); 540184588Sdfr rqstp->rq_addr = NULL; 541184588Sdfr } 542184588Sdfr 543184588Sdfr return (ok); 544184588Sdfr} 545184588Sdfr 546177633Sdfr/* 547177633Sdfr * Send a reply to an rpc request 548177633Sdfr */ 549177633Sdfrbool_t 550184588Sdfrsvc_sendreply(struct svc_req *rqstp, xdrproc_t xdr_results, void * xdr_location) 551177633Sdfr{ 552177633Sdfr struct rpc_msg rply; 553184588Sdfr struct mbuf *m; 554184588Sdfr XDR xdrs; 555184588Sdfr bool_t ok; 556177633Sdfr 557184588Sdfr rply.rm_xid = rqstp->rq_xid; 558177633Sdfr rply.rm_direction = REPLY; 559177633Sdfr rply.rm_reply.rp_stat = MSG_ACCEPTED; 560184588Sdfr rply.acpted_rply.ar_verf = rqstp->rq_verf; 561177633Sdfr rply.acpted_rply.ar_stat = SUCCESS; 562184588Sdfr rply.acpted_rply.ar_results.where = NULL; 563184588Sdfr rply.acpted_rply.ar_results.proc = (xdrproc_t) xdr_void; 564177633Sdfr 565184588Sdfr MGET(m, M_WAIT, MT_DATA); 566184588Sdfr MCLGET(m, M_WAIT); 567184588Sdfr m->m_len = 0; 568184588Sdfr xdrmbuf_create(&xdrs, m, XDR_ENCODE); 569184588Sdfr ok = xdr_results(&xdrs, xdr_location); 570184588Sdfr XDR_DESTROY(&xdrs); 571184588Sdfr 572184588Sdfr if (ok) { 573184588Sdfr return (svc_sendreply_common(rqstp, &rply, m)); 574184588Sdfr } else { 575184588Sdfr m_freem(m); 576184588Sdfr return (FALSE); 577184588Sdfr } 578177633Sdfr} 579177633Sdfr 580184588Sdfrbool_t 581184588Sdfrsvc_sendreply_mbuf(struct svc_req *rqstp, struct mbuf *m) 582184588Sdfr{ 583184588Sdfr struct rpc_msg rply; 584184588Sdfr 585184588Sdfr rply.rm_xid = rqstp->rq_xid; 586184588Sdfr rply.rm_direction = REPLY; 587184588Sdfr rply.rm_reply.rp_stat = MSG_ACCEPTED; 588184588Sdfr rply.acpted_rply.ar_verf = rqstp->rq_verf; 589184588Sdfr rply.acpted_rply.ar_stat = SUCCESS; 590184588Sdfr rply.acpted_rply.ar_results.where = NULL; 591184588Sdfr rply.acpted_rply.ar_results.proc = (xdrproc_t) xdr_void; 592184588Sdfr 593184588Sdfr return (svc_sendreply_common(rqstp, &rply, m)); 594184588Sdfr} 595184588Sdfr 596177633Sdfr/* 597177633Sdfr * No procedure error reply 598177633Sdfr */ 599177633Sdfrvoid 600184588Sdfrsvcerr_noproc(struct svc_req *rqstp) 601177633Sdfr{ 602184588Sdfr SVCXPRT *xprt = rqstp->rq_xprt; 603177633Sdfr struct rpc_msg rply; 604177633Sdfr 605184588Sdfr rply.rm_xid = rqstp->rq_xid; 606177633Sdfr rply.rm_direction = REPLY; 607177633Sdfr rply.rm_reply.rp_stat = MSG_ACCEPTED; 608184588Sdfr rply.acpted_rply.ar_verf = rqstp->rq_verf; 609177633Sdfr rply.acpted_rply.ar_stat = PROC_UNAVAIL; 610177633Sdfr 611184588Sdfr if (xprt->xp_pool->sp_rcache) 612184588Sdfr replay_setreply(xprt->xp_pool->sp_rcache, 613184588Sdfr &rply, svc_getrpccaller(rqstp), NULL); 614184588Sdfr 615184588Sdfr svc_sendreply_common(rqstp, &rply, NULL); 616177633Sdfr} 617177633Sdfr 618177633Sdfr/* 619177633Sdfr * Can't decode args error reply 620177633Sdfr */ 621177633Sdfrvoid 622184588Sdfrsvcerr_decode(struct svc_req *rqstp) 623177633Sdfr{ 624184588Sdfr SVCXPRT *xprt = rqstp->rq_xprt; 625177633Sdfr struct rpc_msg rply; 626177633Sdfr 627184588Sdfr rply.rm_xid = rqstp->rq_xid; 628177633Sdfr rply.rm_direction = REPLY; 629177633Sdfr rply.rm_reply.rp_stat = MSG_ACCEPTED; 630184588Sdfr rply.acpted_rply.ar_verf = rqstp->rq_verf; 631177633Sdfr rply.acpted_rply.ar_stat = GARBAGE_ARGS; 632177633Sdfr 633184588Sdfr if (xprt->xp_pool->sp_rcache) 634184588Sdfr replay_setreply(xprt->xp_pool->sp_rcache, 635184588Sdfr &rply, (struct sockaddr *) &xprt->xp_rtaddr, NULL); 636184588Sdfr 637184588Sdfr svc_sendreply_common(rqstp, &rply, NULL); 638177633Sdfr} 639177633Sdfr 640177633Sdfr/* 641177633Sdfr * Some system error 642177633Sdfr */ 643177633Sdfrvoid 644184588Sdfrsvcerr_systemerr(struct svc_req *rqstp) 645177633Sdfr{ 646184588Sdfr SVCXPRT *xprt = rqstp->rq_xprt; 647177633Sdfr struct rpc_msg rply; 648177633Sdfr 649184588Sdfr rply.rm_xid = rqstp->rq_xid; 650177633Sdfr rply.rm_direction = REPLY; 651177633Sdfr rply.rm_reply.rp_stat = MSG_ACCEPTED; 652184588Sdfr rply.acpted_rply.ar_verf = rqstp->rq_verf; 653177633Sdfr rply.acpted_rply.ar_stat = SYSTEM_ERR; 654177633Sdfr 655184588Sdfr if (xprt->xp_pool->sp_rcache) 656184588Sdfr replay_setreply(xprt->xp_pool->sp_rcache, 657184588Sdfr &rply, svc_getrpccaller(rqstp), NULL); 658184588Sdfr 659184588Sdfr svc_sendreply_common(rqstp, &rply, NULL); 660177633Sdfr} 661177633Sdfr 662177633Sdfr/* 663177633Sdfr * Authentication error reply 664177633Sdfr */ 665177633Sdfrvoid 666184588Sdfrsvcerr_auth(struct svc_req *rqstp, enum auth_stat why) 667177633Sdfr{ 668184588Sdfr SVCXPRT *xprt = rqstp->rq_xprt; 669177633Sdfr struct rpc_msg rply; 670177633Sdfr 671184588Sdfr rply.rm_xid = rqstp->rq_xid; 672177633Sdfr rply.rm_direction = REPLY; 673177633Sdfr rply.rm_reply.rp_stat = MSG_DENIED; 674177633Sdfr rply.rjcted_rply.rj_stat = AUTH_ERROR; 675177633Sdfr rply.rjcted_rply.rj_why = why; 676177633Sdfr 677184588Sdfr if (xprt->xp_pool->sp_rcache) 678184588Sdfr replay_setreply(xprt->xp_pool->sp_rcache, 679184588Sdfr &rply, svc_getrpccaller(rqstp), NULL); 680184588Sdfr 681184588Sdfr svc_sendreply_common(rqstp, &rply, NULL); 682177633Sdfr} 683177633Sdfr 684177633Sdfr/* 685177633Sdfr * Auth too weak error reply 686177633Sdfr */ 687177633Sdfrvoid 688184588Sdfrsvcerr_weakauth(struct svc_req *rqstp) 689177633Sdfr{ 690177633Sdfr 691184588Sdfr svcerr_auth(rqstp, AUTH_TOOWEAK); 692177633Sdfr} 693177633Sdfr 694177633Sdfr/* 695177633Sdfr * Program unavailable error reply 696177633Sdfr */ 697177633Sdfrvoid 698184588Sdfrsvcerr_noprog(struct svc_req *rqstp) 699177633Sdfr{ 700184588Sdfr SVCXPRT *xprt = rqstp->rq_xprt; 701177633Sdfr struct rpc_msg rply; 702177633Sdfr 703184588Sdfr rply.rm_xid = rqstp->rq_xid; 704177633Sdfr rply.rm_direction = REPLY; 705177633Sdfr rply.rm_reply.rp_stat = MSG_ACCEPTED; 706184588Sdfr rply.acpted_rply.ar_verf = rqstp->rq_verf; 707177633Sdfr rply.acpted_rply.ar_stat = PROG_UNAVAIL; 708177633Sdfr 709184588Sdfr if (xprt->xp_pool->sp_rcache) 710184588Sdfr replay_setreply(xprt->xp_pool->sp_rcache, 711184588Sdfr &rply, svc_getrpccaller(rqstp), NULL); 712184588Sdfr 713184588Sdfr svc_sendreply_common(rqstp, &rply, NULL); 714177633Sdfr} 715177633Sdfr 716177633Sdfr/* 717177633Sdfr * Program version mismatch error reply 718177633Sdfr */ 719177633Sdfrvoid 720184588Sdfrsvcerr_progvers(struct svc_req *rqstp, rpcvers_t low_vers, rpcvers_t high_vers) 721177633Sdfr{ 722184588Sdfr SVCXPRT *xprt = rqstp->rq_xprt; 723177633Sdfr struct rpc_msg rply; 724177633Sdfr 725184588Sdfr rply.rm_xid = rqstp->rq_xid; 726177633Sdfr rply.rm_direction = REPLY; 727177633Sdfr rply.rm_reply.rp_stat = MSG_ACCEPTED; 728184588Sdfr rply.acpted_rply.ar_verf = rqstp->rq_verf; 729177633Sdfr rply.acpted_rply.ar_stat = PROG_MISMATCH; 730177633Sdfr rply.acpted_rply.ar_vers.low = (uint32_t)low_vers; 731177633Sdfr rply.acpted_rply.ar_vers.high = (uint32_t)high_vers; 732177633Sdfr 733184588Sdfr if (xprt->xp_pool->sp_rcache) 734184588Sdfr replay_setreply(xprt->xp_pool->sp_rcache, 735184588Sdfr &rply, svc_getrpccaller(rqstp), NULL); 736184588Sdfr 737184588Sdfr svc_sendreply_common(rqstp, &rply, NULL); 738177633Sdfr} 739177633Sdfr 740184588Sdfr/* 741184588Sdfr * Allocate a new server transport structure. All fields are 742184588Sdfr * initialized to zero and xp_p3 is initialized to point at an 743184588Sdfr * extension structure to hold various flags and authentication 744184588Sdfr * parameters. 745184588Sdfr */ 746184588SdfrSVCXPRT * 747184588Sdfrsvc_xprt_alloc() 748184588Sdfr{ 749184588Sdfr SVCXPRT *xprt; 750184588Sdfr SVCXPRT_EXT *ext; 751184588Sdfr 752184588Sdfr xprt = mem_alloc(sizeof(SVCXPRT)); 753184588Sdfr memset(xprt, 0, sizeof(SVCXPRT)); 754184588Sdfr ext = mem_alloc(sizeof(SVCXPRT_EXT)); 755184588Sdfr memset(ext, 0, sizeof(SVCXPRT_EXT)); 756184588Sdfr xprt->xp_p3 = ext; 757184588Sdfr refcount_init(&xprt->xp_refs, 1); 758184588Sdfr 759184588Sdfr return (xprt); 760184588Sdfr} 761184588Sdfr 762184588Sdfr/* 763184588Sdfr * Free a server transport structure. 764184588Sdfr */ 765184588Sdfrvoid 766184588Sdfrsvc_xprt_free(xprt) 767184588Sdfr SVCXPRT *xprt; 768184588Sdfr{ 769184588Sdfr 770184588Sdfr mem_free(xprt->xp_p3, sizeof(SVCXPRT_EXT)); 771184588Sdfr mem_free(xprt, sizeof(SVCXPRT)); 772184588Sdfr} 773184588Sdfr 774177633Sdfr/* ******************* SERVER INPUT STUFF ******************* */ 775177633Sdfr 776177633Sdfr/* 777184588Sdfr * Read RPC requests from a transport and queue them to be 778184588Sdfr * executed. We handle authentication and replay cache replies here. 779184588Sdfr * Actually dispatching the RPC is deferred till svc_executereq. 780177633Sdfr */ 781184588Sdfrstatic enum xprt_stat 782184588Sdfrsvc_getreq(SVCXPRT *xprt, struct svc_req **rqstp_ret) 783177633Sdfr{ 784177633Sdfr SVCPOOL *pool = xprt->xp_pool; 785184588Sdfr struct svc_req *r; 786177633Sdfr struct rpc_msg msg; 787184588Sdfr struct mbuf *args; 788177633Sdfr enum xprt_stat stat; 789177633Sdfr 790177633Sdfr /* now receive msgs from xprtprt (support batch calls) */ 791184588Sdfr r = malloc(sizeof(*r), M_RPC, M_WAITOK|M_ZERO); 792177633Sdfr 793184588Sdfr msg.rm_call.cb_cred.oa_base = r->rq_credarea; 794184588Sdfr msg.rm_call.cb_verf.oa_base = &r->rq_credarea[MAX_AUTH_BYTES]; 795184588Sdfr r->rq_clntcred = &r->rq_credarea[2*MAX_AUTH_BYTES]; 796184588Sdfr if (SVC_RECV(xprt, &msg, &r->rq_addr, &args)) { 797184588Sdfr enum auth_stat why; 798177633Sdfr 799184588Sdfr /* 800184588Sdfr * Handle replays and authenticate before queuing the 801184588Sdfr * request to be executed. 802184588Sdfr */ 803184588Sdfr SVC_ACQUIRE(xprt); 804184588Sdfr r->rq_xprt = xprt; 805184588Sdfr if (pool->sp_rcache) { 806184588Sdfr struct rpc_msg repmsg; 807184588Sdfr struct mbuf *repbody; 808184588Sdfr enum replay_state rs; 809184588Sdfr rs = replay_find(pool->sp_rcache, &msg, 810184588Sdfr svc_getrpccaller(r), &repmsg, &repbody); 811184588Sdfr switch (rs) { 812184588Sdfr case RS_NEW: 813184588Sdfr break; 814184588Sdfr case RS_DONE: 815184588Sdfr SVC_REPLY(xprt, &repmsg, r->rq_addr, 816184588Sdfr repbody); 817184588Sdfr if (r->rq_addr) { 818184588Sdfr free(r->rq_addr, M_SONAME); 819184588Sdfr r->rq_addr = NULL; 820184588Sdfr } 821177633Sdfr goto call_done; 822184588Sdfr 823184588Sdfr default: 824184588Sdfr goto call_done; 825177633Sdfr } 826184588Sdfr } 827184588Sdfr 828184588Sdfr r->rq_xid = msg.rm_xid; 829184588Sdfr r->rq_prog = msg.rm_call.cb_prog; 830184588Sdfr r->rq_vers = msg.rm_call.cb_vers; 831184588Sdfr r->rq_proc = msg.rm_call.cb_proc; 832184588Sdfr r->rq_size = sizeof(*r) + m_length(args, NULL); 833184588Sdfr r->rq_args = args; 834184588Sdfr if ((why = _authenticate(r, &msg)) != AUTH_OK) { 835177633Sdfr /* 836184588Sdfr * RPCSEC_GSS uses this return code 837184588Sdfr * for requests that form part of its 838184588Sdfr * context establishment protocol and 839184588Sdfr * should not be dispatched to the 840184588Sdfr * application. 841177633Sdfr */ 842184588Sdfr if (why != RPCSEC_GSS_NODISPATCH) 843184588Sdfr svcerr_auth(r, why); 844184588Sdfr goto call_done; 845177633Sdfr } 846184588Sdfr 847184588Sdfr if (!SVCAUTH_UNWRAP(&r->rq_auth, &r->rq_args)) { 848184588Sdfr svcerr_decode(r); 849184588Sdfr goto call_done; 850184588Sdfr } 851184588Sdfr 852177633Sdfr /* 853184588Sdfr * Everything checks out, return request to caller. 854177633Sdfr */ 855184588Sdfr *rqstp_ret = r; 856184588Sdfr r = NULL; 857184588Sdfr } 858177633Sdfrcall_done: 859184588Sdfr if (r) { 860184588Sdfr svc_freereq(r); 861184588Sdfr r = NULL; 862184588Sdfr } 863184588Sdfr if ((stat = SVC_STAT(xprt)) == XPRT_DIED) { 864184588Sdfr xprt_unregister(xprt); 865184588Sdfr } 866184588Sdfr 867184588Sdfr return (stat); 868184588Sdfr} 869184588Sdfr 870184588Sdfrstatic void 871184588Sdfrsvc_executereq(struct svc_req *rqstp) 872184588Sdfr{ 873184588Sdfr SVCXPRT *xprt = rqstp->rq_xprt; 874184588Sdfr SVCPOOL *pool = xprt->xp_pool; 875184588Sdfr int prog_found; 876184588Sdfr rpcvers_t low_vers; 877184588Sdfr rpcvers_t high_vers; 878184588Sdfr struct svc_callout *s; 879184588Sdfr 880184588Sdfr /* now match message with a registered service*/ 881184588Sdfr prog_found = FALSE; 882184588Sdfr low_vers = (rpcvers_t) -1L; 883184588Sdfr high_vers = (rpcvers_t) 0L; 884184588Sdfr TAILQ_FOREACH(s, &pool->sp_callouts, sc_link) { 885184588Sdfr if (s->sc_prog == rqstp->rq_prog) { 886184588Sdfr if (s->sc_vers == rqstp->rq_vers) { 887184588Sdfr /* 888184588Sdfr * We hand ownership of r to the 889184588Sdfr * dispatch method - they must call 890184588Sdfr * svc_freereq. 891184588Sdfr */ 892184588Sdfr (*s->sc_dispatch)(rqstp, xprt); 893184588Sdfr return; 894184588Sdfr } /* found correct version */ 895184588Sdfr prog_found = TRUE; 896184588Sdfr if (s->sc_vers < low_vers) 897184588Sdfr low_vers = s->sc_vers; 898184588Sdfr if (s->sc_vers > high_vers) 899184588Sdfr high_vers = s->sc_vers; 900184588Sdfr } /* found correct program */ 901184588Sdfr } 902184588Sdfr 903184588Sdfr /* 904184588Sdfr * if we got here, the program or version 905184588Sdfr * is not served ... 906184588Sdfr */ 907184588Sdfr if (prog_found) 908184588Sdfr svcerr_progvers(rqstp, low_vers, high_vers); 909184588Sdfr else 910184588Sdfr svcerr_noprog(rqstp); 911184588Sdfr 912184588Sdfr svc_freereq(rqstp); 913184588Sdfr} 914184588Sdfr 915184588Sdfrstatic void 916184588Sdfrsvc_checkidle(SVCPOOL *pool) 917184588Sdfr{ 918184588Sdfr SVCXPRT *xprt, *nxprt; 919184588Sdfr time_t timo; 920184588Sdfr struct svcxprt_list cleanup; 921184588Sdfr 922184588Sdfr TAILQ_INIT(&cleanup); 923184588Sdfr TAILQ_FOREACH_SAFE(xprt, &pool->sp_xlist, xp_link, nxprt) { 924184588Sdfr /* 925184588Sdfr * Only some transports have idle timers. Don't time 926184588Sdfr * something out which is just waking up. 927184588Sdfr */ 928184588Sdfr if (!xprt->xp_idletimeout || xprt->xp_thread) 929184588Sdfr continue; 930184588Sdfr 931184588Sdfr timo = xprt->xp_lastactive + xprt->xp_idletimeout; 932184588Sdfr if (time_uptime > timo) { 933184588Sdfr xprt_unregister_locked(xprt); 934184588Sdfr TAILQ_INSERT_TAIL(&cleanup, xprt, xp_link); 935177633Sdfr } 936184588Sdfr } 937184588Sdfr 938184588Sdfr mtx_unlock(&pool->sp_lock); 939184588Sdfr TAILQ_FOREACH_SAFE(xprt, &cleanup, xp_link, nxprt) { 940184588Sdfr SVC_RELEASE(xprt); 941184588Sdfr } 942184588Sdfr mtx_lock(&pool->sp_lock); 943184588Sdfr 944177633Sdfr} 945177633Sdfr 946184588Sdfrstatic void 947184588Sdfrsvc_assign_waiting_sockets(SVCPOOL *pool) 948177633Sdfr{ 949177633Sdfr SVCXPRT *xprt; 950184588Sdfr 951184588Sdfr TAILQ_FOREACH(xprt, &pool->sp_active, xp_alink) { 952184588Sdfr if (!xprt->xp_thread) { 953184588Sdfr xprt_assignthread(xprt); 954184588Sdfr } 955184588Sdfr } 956184588Sdfr} 957184588Sdfr 958184588Sdfrstatic bool_t 959184588Sdfrsvc_request_space_available(SVCPOOL *pool) 960184588Sdfr{ 961184588Sdfr 962184588Sdfr mtx_assert(&pool->sp_lock, MA_OWNED); 963184588Sdfr 964184588Sdfr if (pool->sp_space_throttled) { 965184588Sdfr /* 966184588Sdfr * Below the low-water yet? If so, assign any waiting sockets. 967184588Sdfr */ 968184588Sdfr if (pool->sp_space_used < pool->sp_space_low) { 969184588Sdfr pool->sp_space_throttled = FALSE; 970184588Sdfr svc_assign_waiting_sockets(pool); 971184588Sdfr return TRUE; 972184588Sdfr } 973184588Sdfr 974184588Sdfr return FALSE; 975184588Sdfr } else { 976184588Sdfr if (pool->sp_space_used 977184588Sdfr >= pool->sp_space_high) { 978184588Sdfr pool->sp_space_throttled = TRUE; 979184588Sdfr pool->sp_space_throttle_count++; 980184588Sdfr return FALSE; 981184588Sdfr } 982184588Sdfr 983184588Sdfr return TRUE; 984184588Sdfr } 985184588Sdfr} 986184588Sdfr 987184588Sdfrstatic void 988184588Sdfrsvc_run_internal(SVCPOOL *pool, bool_t ismaster) 989184588Sdfr{ 990184588Sdfr SVCTHREAD *st, *stpref; 991184588Sdfr SVCXPRT *xprt; 992184588Sdfr enum xprt_stat stat; 993184588Sdfr struct svc_req *rqstp; 994177633Sdfr int error; 995177633Sdfr 996184588Sdfr st = mem_alloc(sizeof(*st)); 997184588Sdfr st->st_xprt = NULL; 998184588Sdfr STAILQ_INIT(&st->st_reqs); 999184588Sdfr cv_init(&st->st_cond, "rpcsvc"); 1000184588Sdfr 1001177633Sdfr mtx_lock(&pool->sp_lock); 1002184588Sdfr LIST_INSERT_HEAD(&pool->sp_threads, st, st_link); 1003177633Sdfr 1004184588Sdfr /* 1005184588Sdfr * If we are a new thread which was spawned to cope with 1006184588Sdfr * increased load, set the state back to SVCPOOL_ACTIVE. 1007184588Sdfr */ 1008184588Sdfr if (pool->sp_state == SVCPOOL_THREADSTARTING) 1009184588Sdfr pool->sp_state = SVCPOOL_ACTIVE; 1010177633Sdfr 1011184588Sdfr while (pool->sp_state != SVCPOOL_CLOSING) { 1012184588Sdfr /* 1013184588Sdfr * Check for idle transports once per second. 1014184588Sdfr */ 1015184588Sdfr if (time_uptime > pool->sp_lastidlecheck) { 1016184588Sdfr pool->sp_lastidlecheck = time_uptime; 1017184588Sdfr svc_checkidle(pool); 1018184588Sdfr } 1019184588Sdfr 1020184588Sdfr xprt = st->st_xprt; 1021184588Sdfr if (!xprt && STAILQ_EMPTY(&st->st_reqs)) { 1022184588Sdfr /* 1023184588Sdfr * Enforce maxthreads count. 1024184588Sdfr */ 1025184588Sdfr if (pool->sp_threadcount > pool->sp_maxthreads) 1026177633Sdfr break; 1027184588Sdfr 1028184588Sdfr /* 1029184588Sdfr * Before sleeping, see if we can find an 1030184588Sdfr * active transport which isn't being serviced 1031184588Sdfr * by a thread. 1032184588Sdfr */ 1033184588Sdfr if (svc_request_space_available(pool)) { 1034184588Sdfr TAILQ_FOREACH(xprt, &pool->sp_active, 1035184588Sdfr xp_alink) { 1036184588Sdfr if (!xprt->xp_thread) { 1037184588Sdfr SVC_ACQUIRE(xprt); 1038184588Sdfr xprt->xp_thread = st; 1039184588Sdfr st->st_xprt = xprt; 1040184588Sdfr break; 1041184588Sdfr } 1042184588Sdfr } 1043184588Sdfr } 1044184588Sdfr if (st->st_xprt) 1045184588Sdfr continue; 1046184588Sdfr 1047184588Sdfr LIST_INSERT_HEAD(&pool->sp_idlethreads, st, st_ilink); 1048184588Sdfr error = cv_timedwait_sig(&st->st_cond, &pool->sp_lock, 1049184588Sdfr 5 * hz); 1050184588Sdfr LIST_REMOVE(st, st_ilink); 1051184588Sdfr 1052184588Sdfr /* 1053184588Sdfr * Reduce worker thread count when idle. 1054184588Sdfr */ 1055184588Sdfr if (error == EWOULDBLOCK) { 1056184588Sdfr if (!ismaster 1057184588Sdfr && (pool->sp_threadcount 1058184588Sdfr > pool->sp_minthreads) 1059184588Sdfr && !st->st_xprt 1060184588Sdfr && STAILQ_EMPTY(&st->st_reqs)) 1061184588Sdfr break; 1062184588Sdfr } 1063184588Sdfr if (error == EWOULDBLOCK) 1064184588Sdfr continue; 1065184588Sdfr if (error) { 1066184588Sdfr if (pool->sp_state != SVCPOOL_CLOSING) { 1067184588Sdfr mtx_unlock(&pool->sp_lock); 1068184588Sdfr svc_exit(pool); 1069184588Sdfr mtx_lock(&pool->sp_lock); 1070184588Sdfr } 1071184588Sdfr break; 1072184588Sdfr } 1073184588Sdfr 1074184588Sdfr if (pool->sp_state == SVCPOOL_THREADWANTED) { 1075184588Sdfr pool->sp_state = SVCPOOL_THREADSTARTING; 1076184588Sdfr pool->sp_lastcreatetime = time_uptime; 1077184588Sdfr mtx_unlock(&pool->sp_lock); 1078184588Sdfr svc_new_thread(pool); 1079184588Sdfr mtx_lock(&pool->sp_lock); 1080184588Sdfr } 1081177633Sdfr continue; 1082177633Sdfr } 1083177633Sdfr 1084184588Sdfr if (xprt) { 1085184588Sdfr /* 1086184588Sdfr * Drain the transport socket and queue up any 1087184588Sdfr * RPCs. 1088184588Sdfr */ 1089184588Sdfr xprt->xp_lastactive = time_uptime; 1090184588Sdfr stat = XPRT_IDLE; 1091184588Sdfr do { 1092184588Sdfr if (!svc_request_space_available(pool)) 1093184588Sdfr break; 1094184588Sdfr rqstp = NULL; 1095184588Sdfr mtx_unlock(&pool->sp_lock); 1096184588Sdfr stat = svc_getreq(xprt, &rqstp); 1097184588Sdfr mtx_lock(&pool->sp_lock); 1098184588Sdfr if (rqstp) { 1099184588Sdfr /* 1100184588Sdfr * See if the application has 1101184588Sdfr * a preference for some other 1102184588Sdfr * thread. 1103184588Sdfr */ 1104184588Sdfr stpref = st; 1105184588Sdfr if (pool->sp_assign) 1106184588Sdfr stpref = pool->sp_assign(st, 1107184588Sdfr rqstp); 1108184588Sdfr 1109184588Sdfr pool->sp_space_used += 1110184588Sdfr rqstp->rq_size; 1111184588Sdfr if (pool->sp_space_used 1112184588Sdfr > pool->sp_space_used_highest) 1113184588Sdfr pool->sp_space_used_highest = 1114184588Sdfr pool->sp_space_used; 1115184588Sdfr rqstp->rq_thread = stpref; 1116184588Sdfr STAILQ_INSERT_TAIL(&stpref->st_reqs, 1117184588Sdfr rqstp, rq_link); 1118184588Sdfr stpref->st_reqcount++; 1119184588Sdfr 1120184588Sdfr /* 1121184588Sdfr * If we assigned the request 1122184588Sdfr * to another thread, make 1123184588Sdfr * sure its awake and continue 1124184588Sdfr * reading from the 1125184588Sdfr * socket. Otherwise, try to 1126184588Sdfr * find some other thread to 1127184588Sdfr * read from the socket and 1128184588Sdfr * execute the request 1129184588Sdfr * immediately. 1130184588Sdfr */ 1131184588Sdfr if (stpref != st) { 1132184588Sdfr cv_signal(&stpref->st_cond); 1133184588Sdfr continue; 1134184588Sdfr } else { 1135184588Sdfr break; 1136184588Sdfr } 1137184588Sdfr } 1138184588Sdfr } while (stat == XPRT_MOREREQS 1139184588Sdfr && pool->sp_state != SVCPOOL_CLOSING); 1140184588Sdfr 1141184588Sdfr /* 1142184588Sdfr * Move this transport to the end of the 1143184588Sdfr * active list to ensure fairness when 1144184588Sdfr * multiple transports are active. If this was 1145184588Sdfr * the last queued request, svc_getreq will 1146184588Sdfr * end up calling xprt_inactive to remove from 1147184588Sdfr * the active list. 1148184588Sdfr */ 1149184588Sdfr xprt->xp_thread = NULL; 1150184588Sdfr st->st_xprt = NULL; 1151184588Sdfr if (xprt->xp_active) { 1152184588Sdfr xprt_assignthread(xprt); 1153184588Sdfr TAILQ_REMOVE(&pool->sp_active, xprt, xp_alink); 1154184588Sdfr TAILQ_INSERT_TAIL(&pool->sp_active, xprt, 1155184588Sdfr xp_alink); 1156184588Sdfr } 1157184588Sdfr mtx_unlock(&pool->sp_lock); 1158184588Sdfr SVC_RELEASE(xprt); 1159184588Sdfr mtx_lock(&pool->sp_lock); 1160184588Sdfr } 1161184588Sdfr 1162177633Sdfr /* 1163184588Sdfr * Execute what we have queued. 1164177633Sdfr */ 1165184588Sdfr while ((rqstp = STAILQ_FIRST(&st->st_reqs)) != NULL) { 1166184588Sdfr size_t sz = rqstp->rq_size; 1167184588Sdfr mtx_unlock(&pool->sp_lock); 1168184588Sdfr svc_executereq(rqstp); 1169184588Sdfr mtx_lock(&pool->sp_lock); 1170184588Sdfr pool->sp_space_used -= sz; 1171184588Sdfr } 1172184588Sdfr } 1173177633Sdfr 1174184588Sdfr if (st->st_xprt) { 1175184588Sdfr xprt = st->st_xprt; 1176184588Sdfr st->st_xprt = NULL; 1177184588Sdfr SVC_RELEASE(xprt); 1178177633Sdfr } 1179177633Sdfr 1180184588Sdfr KASSERT(STAILQ_EMPTY(&st->st_reqs), ("stray reqs on exit")); 1181184588Sdfr LIST_REMOVE(st, st_link); 1182184588Sdfr pool->sp_threadcount--; 1183184588Sdfr 1184177633Sdfr mtx_unlock(&pool->sp_lock); 1185184588Sdfr 1186184588Sdfr cv_destroy(&st->st_cond); 1187184588Sdfr mem_free(st, sizeof(*st)); 1188184588Sdfr 1189184588Sdfr if (!ismaster) 1190184588Sdfr wakeup(pool); 1191177633Sdfr} 1192177633Sdfr 1193184588Sdfrstatic void 1194184588Sdfrsvc_thread_start(void *arg) 1195184588Sdfr{ 1196184588Sdfr 1197184588Sdfr svc_run_internal((SVCPOOL *) arg, FALSE); 1198184588Sdfr kthread_exit(); 1199184588Sdfr} 1200184588Sdfr 1201184588Sdfrstatic void 1202184588Sdfrsvc_new_thread(SVCPOOL *pool) 1203184588Sdfr{ 1204184588Sdfr struct thread *td; 1205184588Sdfr 1206184588Sdfr pool->sp_threadcount++; 1207184588Sdfr kthread_add(svc_thread_start, pool, 1208184588Sdfr pool->sp_proc, &td, 0, 0, 1209184588Sdfr "%s: service", pool->sp_name); 1210184588Sdfr} 1211184588Sdfr 1212177633Sdfrvoid 1213184588Sdfrsvc_run(SVCPOOL *pool) 1214184588Sdfr{ 1215184588Sdfr int i; 1216184588Sdfr struct proc *p; 1217184588Sdfr struct thread *td; 1218184588Sdfr 1219184588Sdfr p = curproc; 1220184588Sdfr td = curthread; 1221184588Sdfr snprintf(td->td_name, sizeof(td->td_name), 1222184588Sdfr "%s: master", pool->sp_name); 1223184588Sdfr pool->sp_state = SVCPOOL_ACTIVE; 1224184588Sdfr pool->sp_proc = p; 1225184588Sdfr pool->sp_lastcreatetime = time_uptime; 1226184588Sdfr pool->sp_threadcount = 1; 1227184588Sdfr 1228184588Sdfr for (i = 1; i < pool->sp_minthreads; i++) { 1229184588Sdfr svc_new_thread(pool); 1230184588Sdfr } 1231184588Sdfr 1232184588Sdfr svc_run_internal(pool, TRUE); 1233184588Sdfr 1234184588Sdfr mtx_lock(&pool->sp_lock); 1235184588Sdfr while (pool->sp_threadcount > 0) 1236184588Sdfr msleep(pool, &pool->sp_lock, 0, "svcexit", 0); 1237184588Sdfr mtx_unlock(&pool->sp_lock); 1238184588Sdfr} 1239184588Sdfr 1240184588Sdfrvoid 1241177633Sdfrsvc_exit(SVCPOOL *pool) 1242177633Sdfr{ 1243184588Sdfr SVCTHREAD *st; 1244184588Sdfr 1245177633Sdfr mtx_lock(&pool->sp_lock); 1246184588Sdfr 1247184588Sdfr pool->sp_state = SVCPOOL_CLOSING; 1248184588Sdfr LIST_FOREACH(st, &pool->sp_idlethreads, st_ilink) 1249184588Sdfr cv_signal(&st->st_cond); 1250184588Sdfr 1251177633Sdfr mtx_unlock(&pool->sp_lock); 1252177633Sdfr} 1253184588Sdfr 1254184588Sdfrbool_t 1255184588Sdfrsvc_getargs(struct svc_req *rqstp, xdrproc_t xargs, void *args) 1256184588Sdfr{ 1257184588Sdfr struct mbuf *m; 1258184588Sdfr XDR xdrs; 1259184588Sdfr bool_t stat; 1260184588Sdfr 1261184588Sdfr m = rqstp->rq_args; 1262184588Sdfr rqstp->rq_args = NULL; 1263184588Sdfr 1264184588Sdfr xdrmbuf_create(&xdrs, m, XDR_DECODE); 1265184588Sdfr stat = xargs(&xdrs, args); 1266184588Sdfr XDR_DESTROY(&xdrs); 1267184588Sdfr 1268184588Sdfr return (stat); 1269184588Sdfr} 1270184588Sdfr 1271184588Sdfrbool_t 1272184588Sdfrsvc_freeargs(struct svc_req *rqstp, xdrproc_t xargs, void *args) 1273184588Sdfr{ 1274184588Sdfr XDR xdrs; 1275184588Sdfr 1276184588Sdfr if (rqstp->rq_addr) { 1277184588Sdfr free(rqstp->rq_addr, M_SONAME); 1278184588Sdfr rqstp->rq_addr = NULL; 1279184588Sdfr } 1280184588Sdfr 1281184588Sdfr xdrs.x_op = XDR_FREE; 1282184588Sdfr return (xargs(&xdrs, args)); 1283184588Sdfr} 1284184588Sdfr 1285184588Sdfrvoid 1286184588Sdfrsvc_freereq(struct svc_req *rqstp) 1287184588Sdfr{ 1288184588Sdfr SVCTHREAD *st; 1289184588Sdfr SVCXPRT *xprt; 1290184588Sdfr SVCPOOL *pool; 1291184588Sdfr 1292184588Sdfr st = rqstp->rq_thread; 1293184588Sdfr xprt = rqstp->rq_xprt; 1294184588Sdfr if (xprt) 1295184588Sdfr pool = xprt->xp_pool; 1296184588Sdfr else 1297184588Sdfr pool = NULL; 1298184588Sdfr if (st) { 1299184588Sdfr mtx_lock(&pool->sp_lock); 1300184588Sdfr KASSERT(rqstp == STAILQ_FIRST(&st->st_reqs), 1301184588Sdfr ("Freeing request out of order")); 1302184588Sdfr STAILQ_REMOVE_HEAD(&st->st_reqs, rq_link); 1303184588Sdfr st->st_reqcount--; 1304184588Sdfr if (pool->sp_done) 1305184588Sdfr pool->sp_done(st, rqstp); 1306184588Sdfr mtx_unlock(&pool->sp_lock); 1307184588Sdfr } 1308184588Sdfr 1309184588Sdfr if (rqstp->rq_auth.svc_ah_ops) 1310184588Sdfr SVCAUTH_RELEASE(&rqstp->rq_auth); 1311184588Sdfr 1312184588Sdfr if (rqstp->rq_xprt) { 1313184588Sdfr SVC_RELEASE(rqstp->rq_xprt); 1314184588Sdfr } 1315184588Sdfr 1316184588Sdfr if (rqstp->rq_addr) 1317184588Sdfr free(rqstp->rq_addr, M_SONAME); 1318184588Sdfr 1319184588Sdfr if (rqstp->rq_args) 1320184588Sdfr m_freem(rqstp->rq_args); 1321184588Sdfr 1322184588Sdfr free(rqstp, M_RPC); 1323184588Sdfr} 1324