svc.c revision 193436
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 193436 2009-06-04 14:13:06Z 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 } 177177633Sdfr 178184588Sdfr TAILQ_FOREACH_SAFE(xprt, &cleanup, xp_link, nxprt) { 179184588Sdfr SVC_RELEASE(xprt); 180184588Sdfr } 181184588Sdfr 182193436Srmacklem mtx_destroy(&pool->sp_lock); 183193436Srmacklem 184184588Sdfr if (pool->sp_rcache) 185184588Sdfr replay_freecache(pool->sp_rcache); 186184588Sdfr 187184588Sdfr sysctl_ctx_free(&pool->sp_sysctl); 188177633Sdfr free(pool, M_RPC); 189177633Sdfr} 190177633Sdfr 191184588Sdfrstatic bool_t 192184588Sdfrsvcpool_active(SVCPOOL *pool) 193184588Sdfr{ 194184588Sdfr enum svcpool_state state = pool->sp_state; 195184588Sdfr 196184588Sdfr if (state == SVCPOOL_INIT || state == SVCPOOL_CLOSING) 197184588Sdfr return (FALSE); 198184588Sdfr return (TRUE); 199184588Sdfr} 200184588Sdfr 201177633Sdfr/* 202184588Sdfr * Sysctl handler to set the minimum thread count on a pool 203184588Sdfr */ 204184588Sdfrstatic int 205184588Sdfrsvcpool_minthread_sysctl(SYSCTL_HANDLER_ARGS) 206184588Sdfr{ 207184588Sdfr SVCPOOL *pool; 208184588Sdfr int newminthreads, error, n; 209184588Sdfr 210184588Sdfr pool = oidp->oid_arg1; 211184588Sdfr newminthreads = pool->sp_minthreads; 212184588Sdfr error = sysctl_handle_int(oidp, &newminthreads, 0, req); 213184588Sdfr if (error == 0 && newminthreads != pool->sp_minthreads) { 214184588Sdfr if (newminthreads > pool->sp_maxthreads) 215184588Sdfr return (EINVAL); 216184588Sdfr mtx_lock(&pool->sp_lock); 217184588Sdfr if (newminthreads > pool->sp_minthreads 218184588Sdfr && svcpool_active(pool)) { 219184588Sdfr /* 220184588Sdfr * If the pool is running and we are 221184588Sdfr * increasing, create some more threads now. 222184588Sdfr */ 223184588Sdfr n = newminthreads - pool->sp_threadcount; 224184588Sdfr if (n > 0) { 225184588Sdfr mtx_unlock(&pool->sp_lock); 226184588Sdfr while (n--) 227184588Sdfr svc_new_thread(pool); 228184588Sdfr mtx_lock(&pool->sp_lock); 229184588Sdfr } 230184588Sdfr } 231184588Sdfr pool->sp_minthreads = newminthreads; 232184588Sdfr mtx_unlock(&pool->sp_lock); 233184588Sdfr } 234184588Sdfr return (error); 235184588Sdfr} 236184588Sdfr 237184588Sdfr/* 238184588Sdfr * Sysctl handler to set the maximum thread count on a pool 239184588Sdfr */ 240184588Sdfrstatic int 241184588Sdfrsvcpool_maxthread_sysctl(SYSCTL_HANDLER_ARGS) 242184588Sdfr{ 243184588Sdfr SVCPOOL *pool; 244184588Sdfr SVCTHREAD *st; 245184588Sdfr int newmaxthreads, error; 246184588Sdfr 247184588Sdfr pool = oidp->oid_arg1; 248184588Sdfr newmaxthreads = pool->sp_maxthreads; 249184588Sdfr error = sysctl_handle_int(oidp, &newmaxthreads, 0, req); 250184588Sdfr if (error == 0 && newmaxthreads != pool->sp_maxthreads) { 251184588Sdfr if (newmaxthreads < pool->sp_minthreads) 252184588Sdfr return (EINVAL); 253184588Sdfr mtx_lock(&pool->sp_lock); 254184588Sdfr if (newmaxthreads < pool->sp_maxthreads 255184588Sdfr && svcpool_active(pool)) { 256184588Sdfr /* 257184588Sdfr * If the pool is running and we are 258184588Sdfr * decreasing, wake up some idle threads to 259184588Sdfr * encourage them to exit. 260184588Sdfr */ 261184588Sdfr LIST_FOREACH(st, &pool->sp_idlethreads, st_ilink) 262184588Sdfr cv_signal(&st->st_cond); 263184588Sdfr } 264184588Sdfr pool->sp_maxthreads = newmaxthreads; 265184588Sdfr mtx_unlock(&pool->sp_lock); 266184588Sdfr } 267184588Sdfr return (error); 268184588Sdfr} 269184588Sdfr 270184588Sdfr/* 271177633Sdfr * Activate a transport handle. 272177633Sdfr */ 273177633Sdfrvoid 274177633Sdfrxprt_register(SVCXPRT *xprt) 275177633Sdfr{ 276177633Sdfr SVCPOOL *pool = xprt->xp_pool; 277177633Sdfr 278177633Sdfr mtx_lock(&pool->sp_lock); 279177633Sdfr xprt->xp_registered = TRUE; 280177633Sdfr xprt->xp_active = FALSE; 281177633Sdfr TAILQ_INSERT_TAIL(&pool->sp_xlist, xprt, xp_link); 282177633Sdfr mtx_unlock(&pool->sp_lock); 283177633Sdfr} 284177633Sdfr 285177633Sdfr/* 286184588Sdfr * De-activate a transport handle. Note: the locked version doesn't 287184588Sdfr * release the transport - caller must do that after dropping the pool 288184588Sdfr * lock. 289177633Sdfr */ 290177633Sdfrstatic void 291184588Sdfrxprt_unregister_locked(SVCXPRT *xprt) 292177633Sdfr{ 293177633Sdfr SVCPOOL *pool = xprt->xp_pool; 294177633Sdfr 295177633Sdfr if (xprt->xp_active) { 296177633Sdfr TAILQ_REMOVE(&pool->sp_active, xprt, xp_alink); 297177633Sdfr xprt->xp_active = FALSE; 298177633Sdfr } 299177633Sdfr TAILQ_REMOVE(&pool->sp_xlist, xprt, xp_link); 300177633Sdfr xprt->xp_registered = FALSE; 301184588Sdfr} 302177633Sdfr 303184588Sdfrvoid 304184588Sdfrxprt_unregister(SVCXPRT *xprt) 305184588Sdfr{ 306184588Sdfr SVCPOOL *pool = xprt->xp_pool; 307184588Sdfr 308184588Sdfr mtx_lock(&pool->sp_lock); 309184588Sdfr xprt_unregister_locked(xprt); 310184588Sdfr mtx_unlock(&pool->sp_lock); 311184588Sdfr 312184588Sdfr SVC_RELEASE(xprt); 313177633Sdfr} 314177633Sdfr 315184588Sdfrstatic void 316184588Sdfrxprt_assignthread(SVCXPRT *xprt) 317184588Sdfr{ 318184588Sdfr SVCPOOL *pool = xprt->xp_pool; 319184588Sdfr SVCTHREAD *st; 320184588Sdfr 321184588Sdfr /* 322184588Sdfr * Attempt to assign a service thread to this 323184588Sdfr * transport. 324184588Sdfr */ 325184588Sdfr LIST_FOREACH(st, &pool->sp_idlethreads, st_ilink) { 326184588Sdfr if (st->st_xprt == NULL && STAILQ_EMPTY(&st->st_reqs)) 327184588Sdfr break; 328184588Sdfr } 329184588Sdfr if (st) { 330184588Sdfr SVC_ACQUIRE(xprt); 331184588Sdfr xprt->xp_thread = st; 332184588Sdfr st->st_xprt = xprt; 333184588Sdfr cv_signal(&st->st_cond); 334184588Sdfr } else { 335184588Sdfr /* 336184588Sdfr * See if we can create a new thread. The 337184588Sdfr * actual thread creation happens in 338184588Sdfr * svc_run_internal because our locking state 339184588Sdfr * is poorly defined (we are typically called 340184588Sdfr * from a socket upcall). Don't create more 341184588Sdfr * than one thread per second. 342184588Sdfr */ 343184588Sdfr if (pool->sp_state == SVCPOOL_ACTIVE 344184588Sdfr && pool->sp_lastcreatetime < time_uptime 345184588Sdfr && pool->sp_threadcount < pool->sp_maxthreads) { 346184588Sdfr pool->sp_state = SVCPOOL_THREADWANTED; 347184588Sdfr } 348184588Sdfr } 349184588Sdfr} 350184588Sdfr 351177633Sdfrvoid 352177633Sdfrxprt_active(SVCXPRT *xprt) 353177633Sdfr{ 354177633Sdfr SVCPOOL *pool = xprt->xp_pool; 355177633Sdfr 356193436Srmacklem mtx_lock(&pool->sp_lock); 357193436Srmacklem 358184588Sdfr if (!xprt->xp_registered) { 359184588Sdfr /* 360184588Sdfr * Race with xprt_unregister - we lose. 361184588Sdfr */ 362193436Srmacklem mtx_unlock(&pool->sp_lock); 363184588Sdfr return; 364184588Sdfr } 365184588Sdfr 366177633Sdfr if (!xprt->xp_active) { 367177633Sdfr TAILQ_INSERT_TAIL(&pool->sp_active, xprt, xp_alink); 368177633Sdfr xprt->xp_active = TRUE; 369184588Sdfr xprt_assignthread(xprt); 370177633Sdfr } 371177633Sdfr 372177633Sdfr mtx_unlock(&pool->sp_lock); 373177633Sdfr} 374177633Sdfr 375177633Sdfrvoid 376184588Sdfrxprt_inactive_locked(SVCXPRT *xprt) 377177633Sdfr{ 378177633Sdfr SVCPOOL *pool = xprt->xp_pool; 379177633Sdfr 380177633Sdfr if (xprt->xp_active) { 381177633Sdfr TAILQ_REMOVE(&pool->sp_active, xprt, xp_alink); 382177633Sdfr xprt->xp_active = FALSE; 383177633Sdfr } 384184588Sdfr} 385177633Sdfr 386184588Sdfrvoid 387184588Sdfrxprt_inactive(SVCXPRT *xprt) 388184588Sdfr{ 389184588Sdfr SVCPOOL *pool = xprt->xp_pool; 390184588Sdfr 391184588Sdfr mtx_lock(&pool->sp_lock); 392184588Sdfr xprt_inactive_locked(xprt); 393177633Sdfr mtx_unlock(&pool->sp_lock); 394177633Sdfr} 395177633Sdfr 396177633Sdfr/* 397177633Sdfr * Add a service program to the callout list. 398177633Sdfr * The dispatch routine will be called when a rpc request for this 399177633Sdfr * program number comes in. 400177633Sdfr */ 401177633Sdfrbool_t 402177633Sdfrsvc_reg(SVCXPRT *xprt, const rpcprog_t prog, const rpcvers_t vers, 403177633Sdfr void (*dispatch)(struct svc_req *, SVCXPRT *), 404177633Sdfr const struct netconfig *nconf) 405177633Sdfr{ 406177633Sdfr SVCPOOL *pool = xprt->xp_pool; 407177633Sdfr struct svc_callout *s; 408177633Sdfr char *netid = NULL; 409177633Sdfr int flag = 0; 410177633Sdfr 411177633Sdfr/* VARIABLES PROTECTED BY svc_lock: s, svc_head */ 412177633Sdfr 413177633Sdfr if (xprt->xp_netid) { 414177633Sdfr netid = strdup(xprt->xp_netid, M_RPC); 415177633Sdfr flag = 1; 416177633Sdfr } else if (nconf && nconf->nc_netid) { 417177633Sdfr netid = strdup(nconf->nc_netid, M_RPC); 418177633Sdfr flag = 1; 419177633Sdfr } /* must have been created with svc_raw_create */ 420177633Sdfr if ((netid == NULL) && (flag == 1)) { 421177633Sdfr return (FALSE); 422177633Sdfr } 423177633Sdfr 424177633Sdfr mtx_lock(&pool->sp_lock); 425177633Sdfr if ((s = svc_find(pool, prog, vers, netid)) != NULL) { 426177633Sdfr if (netid) 427177633Sdfr free(netid, M_RPC); 428177633Sdfr if (s->sc_dispatch == dispatch) 429177633Sdfr goto rpcb_it; /* he is registering another xptr */ 430177633Sdfr mtx_unlock(&pool->sp_lock); 431177633Sdfr return (FALSE); 432177633Sdfr } 433177633Sdfr s = malloc(sizeof (struct svc_callout), M_RPC, M_NOWAIT); 434177633Sdfr if (s == NULL) { 435177633Sdfr if (netid) 436177633Sdfr free(netid, M_RPC); 437177633Sdfr mtx_unlock(&pool->sp_lock); 438177633Sdfr return (FALSE); 439177633Sdfr } 440177633Sdfr 441177633Sdfr s->sc_prog = prog; 442177633Sdfr s->sc_vers = vers; 443177633Sdfr s->sc_dispatch = dispatch; 444177633Sdfr s->sc_netid = netid; 445177633Sdfr TAILQ_INSERT_TAIL(&pool->sp_callouts, s, sc_link); 446177633Sdfr 447177633Sdfr if ((xprt->xp_netid == NULL) && (flag == 1) && netid) 448177633Sdfr ((SVCXPRT *) xprt)->xp_netid = strdup(netid, M_RPC); 449177633Sdfr 450177633Sdfrrpcb_it: 451177633Sdfr mtx_unlock(&pool->sp_lock); 452177633Sdfr /* now register the information with the local binder service */ 453177633Sdfr if (nconf) { 454177633Sdfr bool_t dummy; 455177633Sdfr struct netconfig tnc; 456184588Sdfr struct netbuf nb; 457177633Sdfr tnc = *nconf; 458184588Sdfr nb.buf = &xprt->xp_ltaddr; 459184588Sdfr nb.len = xprt->xp_ltaddr.ss_len; 460184588Sdfr dummy = rpcb_set(prog, vers, &tnc, &nb); 461177633Sdfr return (dummy); 462177633Sdfr } 463177633Sdfr return (TRUE); 464177633Sdfr} 465177633Sdfr 466177633Sdfr/* 467177633Sdfr * Remove a service program from the callout list. 468177633Sdfr */ 469177633Sdfrvoid 470177633Sdfrsvc_unreg(SVCPOOL *pool, const rpcprog_t prog, const rpcvers_t vers) 471177633Sdfr{ 472177633Sdfr struct svc_callout *s; 473177633Sdfr 474177633Sdfr /* unregister the information anyway */ 475177633Sdfr (void) rpcb_unset(prog, vers, NULL); 476177633Sdfr mtx_lock(&pool->sp_lock); 477177633Sdfr while ((s = svc_find(pool, prog, vers, NULL)) != NULL) { 478177633Sdfr TAILQ_REMOVE(&pool->sp_callouts, s, sc_link); 479177633Sdfr if (s->sc_netid) 480177633Sdfr mem_free(s->sc_netid, sizeof (s->sc_netid) + 1); 481177633Sdfr mem_free(s, sizeof (struct svc_callout)); 482177633Sdfr } 483177633Sdfr mtx_unlock(&pool->sp_lock); 484177633Sdfr} 485177633Sdfr 486177633Sdfr/* ********************** CALLOUT list related stuff ************* */ 487177633Sdfr 488177633Sdfr/* 489177633Sdfr * Search the callout list for a program number, return the callout 490177633Sdfr * struct. 491177633Sdfr */ 492177633Sdfrstatic struct svc_callout * 493177633Sdfrsvc_find(SVCPOOL *pool, rpcprog_t prog, rpcvers_t vers, char *netid) 494177633Sdfr{ 495177633Sdfr struct svc_callout *s; 496177633Sdfr 497177633Sdfr mtx_assert(&pool->sp_lock, MA_OWNED); 498177633Sdfr TAILQ_FOREACH(s, &pool->sp_callouts, sc_link) { 499177633Sdfr if (s->sc_prog == prog && s->sc_vers == vers 500177633Sdfr && (netid == NULL || s->sc_netid == NULL || 501177633Sdfr strcmp(netid, s->sc_netid) == 0)) 502177633Sdfr break; 503177633Sdfr } 504177633Sdfr 505177633Sdfr return (s); 506177633Sdfr} 507177633Sdfr 508177633Sdfr/* ******************* REPLY GENERATION ROUTINES ************ */ 509177633Sdfr 510184588Sdfrstatic bool_t 511184588Sdfrsvc_sendreply_common(struct svc_req *rqstp, struct rpc_msg *rply, 512184588Sdfr struct mbuf *body) 513184588Sdfr{ 514184588Sdfr SVCXPRT *xprt = rqstp->rq_xprt; 515184588Sdfr bool_t ok; 516184588Sdfr 517184588Sdfr if (rqstp->rq_args) { 518184588Sdfr m_freem(rqstp->rq_args); 519184588Sdfr rqstp->rq_args = NULL; 520184588Sdfr } 521184588Sdfr 522184588Sdfr if (xprt->xp_pool->sp_rcache) 523184588Sdfr replay_setreply(xprt->xp_pool->sp_rcache, 524184588Sdfr rply, svc_getrpccaller(rqstp), body); 525184588Sdfr 526184588Sdfr if (!SVCAUTH_WRAP(&rqstp->rq_auth, &body)) 527184588Sdfr return (FALSE); 528184588Sdfr 529184588Sdfr ok = SVC_REPLY(xprt, rply, rqstp->rq_addr, body); 530184588Sdfr if (rqstp->rq_addr) { 531184588Sdfr free(rqstp->rq_addr, M_SONAME); 532184588Sdfr rqstp->rq_addr = NULL; 533184588Sdfr } 534184588Sdfr 535184588Sdfr return (ok); 536184588Sdfr} 537184588Sdfr 538177633Sdfr/* 539177633Sdfr * Send a reply to an rpc request 540177633Sdfr */ 541177633Sdfrbool_t 542184588Sdfrsvc_sendreply(struct svc_req *rqstp, xdrproc_t xdr_results, void * xdr_location) 543177633Sdfr{ 544177633Sdfr struct rpc_msg rply; 545184588Sdfr struct mbuf *m; 546184588Sdfr XDR xdrs; 547184588Sdfr bool_t ok; 548177633Sdfr 549184588Sdfr rply.rm_xid = rqstp->rq_xid; 550177633Sdfr rply.rm_direction = REPLY; 551177633Sdfr rply.rm_reply.rp_stat = MSG_ACCEPTED; 552184588Sdfr rply.acpted_rply.ar_verf = rqstp->rq_verf; 553177633Sdfr rply.acpted_rply.ar_stat = SUCCESS; 554184588Sdfr rply.acpted_rply.ar_results.where = NULL; 555184588Sdfr rply.acpted_rply.ar_results.proc = (xdrproc_t) xdr_void; 556177633Sdfr 557184588Sdfr MGET(m, M_WAIT, MT_DATA); 558184588Sdfr MCLGET(m, M_WAIT); 559184588Sdfr m->m_len = 0; 560184588Sdfr xdrmbuf_create(&xdrs, m, XDR_ENCODE); 561184588Sdfr ok = xdr_results(&xdrs, xdr_location); 562184588Sdfr XDR_DESTROY(&xdrs); 563184588Sdfr 564184588Sdfr if (ok) { 565184588Sdfr return (svc_sendreply_common(rqstp, &rply, m)); 566184588Sdfr } else { 567184588Sdfr m_freem(m); 568184588Sdfr return (FALSE); 569184588Sdfr } 570177633Sdfr} 571177633Sdfr 572184588Sdfrbool_t 573184588Sdfrsvc_sendreply_mbuf(struct svc_req *rqstp, struct mbuf *m) 574184588Sdfr{ 575184588Sdfr struct rpc_msg rply; 576184588Sdfr 577184588Sdfr rply.rm_xid = rqstp->rq_xid; 578184588Sdfr rply.rm_direction = REPLY; 579184588Sdfr rply.rm_reply.rp_stat = MSG_ACCEPTED; 580184588Sdfr rply.acpted_rply.ar_verf = rqstp->rq_verf; 581184588Sdfr rply.acpted_rply.ar_stat = SUCCESS; 582184588Sdfr rply.acpted_rply.ar_results.where = NULL; 583184588Sdfr rply.acpted_rply.ar_results.proc = (xdrproc_t) xdr_void; 584184588Sdfr 585184588Sdfr return (svc_sendreply_common(rqstp, &rply, m)); 586184588Sdfr} 587184588Sdfr 588177633Sdfr/* 589177633Sdfr * No procedure error reply 590177633Sdfr */ 591177633Sdfrvoid 592184588Sdfrsvcerr_noproc(struct svc_req *rqstp) 593177633Sdfr{ 594184588Sdfr SVCXPRT *xprt = rqstp->rq_xprt; 595177633Sdfr struct rpc_msg rply; 596177633Sdfr 597184588Sdfr rply.rm_xid = rqstp->rq_xid; 598177633Sdfr rply.rm_direction = REPLY; 599177633Sdfr rply.rm_reply.rp_stat = MSG_ACCEPTED; 600184588Sdfr rply.acpted_rply.ar_verf = rqstp->rq_verf; 601177633Sdfr rply.acpted_rply.ar_stat = PROC_UNAVAIL; 602177633Sdfr 603184588Sdfr if (xprt->xp_pool->sp_rcache) 604184588Sdfr replay_setreply(xprt->xp_pool->sp_rcache, 605184588Sdfr &rply, svc_getrpccaller(rqstp), NULL); 606184588Sdfr 607184588Sdfr svc_sendreply_common(rqstp, &rply, NULL); 608177633Sdfr} 609177633Sdfr 610177633Sdfr/* 611177633Sdfr * Can't decode args error reply 612177633Sdfr */ 613177633Sdfrvoid 614184588Sdfrsvcerr_decode(struct svc_req *rqstp) 615177633Sdfr{ 616184588Sdfr SVCXPRT *xprt = rqstp->rq_xprt; 617177633Sdfr struct rpc_msg rply; 618177633Sdfr 619184588Sdfr rply.rm_xid = rqstp->rq_xid; 620177633Sdfr rply.rm_direction = REPLY; 621177633Sdfr rply.rm_reply.rp_stat = MSG_ACCEPTED; 622184588Sdfr rply.acpted_rply.ar_verf = rqstp->rq_verf; 623177633Sdfr rply.acpted_rply.ar_stat = GARBAGE_ARGS; 624177633Sdfr 625184588Sdfr if (xprt->xp_pool->sp_rcache) 626184588Sdfr replay_setreply(xprt->xp_pool->sp_rcache, 627184588Sdfr &rply, (struct sockaddr *) &xprt->xp_rtaddr, NULL); 628184588Sdfr 629184588Sdfr svc_sendreply_common(rqstp, &rply, NULL); 630177633Sdfr} 631177633Sdfr 632177633Sdfr/* 633177633Sdfr * Some system error 634177633Sdfr */ 635177633Sdfrvoid 636184588Sdfrsvcerr_systemerr(struct svc_req *rqstp) 637177633Sdfr{ 638184588Sdfr SVCXPRT *xprt = rqstp->rq_xprt; 639177633Sdfr struct rpc_msg rply; 640177633Sdfr 641184588Sdfr rply.rm_xid = rqstp->rq_xid; 642177633Sdfr rply.rm_direction = REPLY; 643177633Sdfr rply.rm_reply.rp_stat = MSG_ACCEPTED; 644184588Sdfr rply.acpted_rply.ar_verf = rqstp->rq_verf; 645177633Sdfr rply.acpted_rply.ar_stat = SYSTEM_ERR; 646177633Sdfr 647184588Sdfr if (xprt->xp_pool->sp_rcache) 648184588Sdfr replay_setreply(xprt->xp_pool->sp_rcache, 649184588Sdfr &rply, svc_getrpccaller(rqstp), NULL); 650184588Sdfr 651184588Sdfr svc_sendreply_common(rqstp, &rply, NULL); 652177633Sdfr} 653177633Sdfr 654177633Sdfr/* 655177633Sdfr * Authentication error reply 656177633Sdfr */ 657177633Sdfrvoid 658184588Sdfrsvcerr_auth(struct svc_req *rqstp, enum auth_stat why) 659177633Sdfr{ 660184588Sdfr SVCXPRT *xprt = rqstp->rq_xprt; 661177633Sdfr struct rpc_msg rply; 662177633Sdfr 663184588Sdfr rply.rm_xid = rqstp->rq_xid; 664177633Sdfr rply.rm_direction = REPLY; 665177633Sdfr rply.rm_reply.rp_stat = MSG_DENIED; 666177633Sdfr rply.rjcted_rply.rj_stat = AUTH_ERROR; 667177633Sdfr rply.rjcted_rply.rj_why = why; 668177633Sdfr 669184588Sdfr if (xprt->xp_pool->sp_rcache) 670184588Sdfr replay_setreply(xprt->xp_pool->sp_rcache, 671184588Sdfr &rply, svc_getrpccaller(rqstp), NULL); 672184588Sdfr 673184588Sdfr svc_sendreply_common(rqstp, &rply, NULL); 674177633Sdfr} 675177633Sdfr 676177633Sdfr/* 677177633Sdfr * Auth too weak error reply 678177633Sdfr */ 679177633Sdfrvoid 680184588Sdfrsvcerr_weakauth(struct svc_req *rqstp) 681177633Sdfr{ 682177633Sdfr 683184588Sdfr svcerr_auth(rqstp, AUTH_TOOWEAK); 684177633Sdfr} 685177633Sdfr 686177633Sdfr/* 687177633Sdfr * Program unavailable error reply 688177633Sdfr */ 689177633Sdfrvoid 690184588Sdfrsvcerr_noprog(struct svc_req *rqstp) 691177633Sdfr{ 692184588Sdfr SVCXPRT *xprt = rqstp->rq_xprt; 693177633Sdfr struct rpc_msg rply; 694177633Sdfr 695184588Sdfr rply.rm_xid = rqstp->rq_xid; 696177633Sdfr rply.rm_direction = REPLY; 697177633Sdfr rply.rm_reply.rp_stat = MSG_ACCEPTED; 698184588Sdfr rply.acpted_rply.ar_verf = rqstp->rq_verf; 699177633Sdfr rply.acpted_rply.ar_stat = PROG_UNAVAIL; 700177633Sdfr 701184588Sdfr if (xprt->xp_pool->sp_rcache) 702184588Sdfr replay_setreply(xprt->xp_pool->sp_rcache, 703184588Sdfr &rply, svc_getrpccaller(rqstp), NULL); 704184588Sdfr 705184588Sdfr svc_sendreply_common(rqstp, &rply, NULL); 706177633Sdfr} 707177633Sdfr 708177633Sdfr/* 709177633Sdfr * Program version mismatch error reply 710177633Sdfr */ 711177633Sdfrvoid 712184588Sdfrsvcerr_progvers(struct svc_req *rqstp, rpcvers_t low_vers, rpcvers_t high_vers) 713177633Sdfr{ 714184588Sdfr SVCXPRT *xprt = rqstp->rq_xprt; 715177633Sdfr struct rpc_msg rply; 716177633Sdfr 717184588Sdfr rply.rm_xid = rqstp->rq_xid; 718177633Sdfr rply.rm_direction = REPLY; 719177633Sdfr rply.rm_reply.rp_stat = MSG_ACCEPTED; 720184588Sdfr rply.acpted_rply.ar_verf = rqstp->rq_verf; 721177633Sdfr rply.acpted_rply.ar_stat = PROG_MISMATCH; 722177633Sdfr rply.acpted_rply.ar_vers.low = (uint32_t)low_vers; 723177633Sdfr rply.acpted_rply.ar_vers.high = (uint32_t)high_vers; 724177633Sdfr 725184588Sdfr if (xprt->xp_pool->sp_rcache) 726184588Sdfr replay_setreply(xprt->xp_pool->sp_rcache, 727184588Sdfr &rply, svc_getrpccaller(rqstp), NULL); 728184588Sdfr 729184588Sdfr svc_sendreply_common(rqstp, &rply, NULL); 730177633Sdfr} 731177633Sdfr 732184588Sdfr/* 733184588Sdfr * Allocate a new server transport structure. All fields are 734184588Sdfr * initialized to zero and xp_p3 is initialized to point at an 735184588Sdfr * extension structure to hold various flags and authentication 736184588Sdfr * parameters. 737184588Sdfr */ 738184588SdfrSVCXPRT * 739184588Sdfrsvc_xprt_alloc() 740184588Sdfr{ 741184588Sdfr SVCXPRT *xprt; 742184588Sdfr SVCXPRT_EXT *ext; 743184588Sdfr 744184588Sdfr xprt = mem_alloc(sizeof(SVCXPRT)); 745184588Sdfr memset(xprt, 0, sizeof(SVCXPRT)); 746184588Sdfr ext = mem_alloc(sizeof(SVCXPRT_EXT)); 747184588Sdfr memset(ext, 0, sizeof(SVCXPRT_EXT)); 748184588Sdfr xprt->xp_p3 = ext; 749184588Sdfr refcount_init(&xprt->xp_refs, 1); 750184588Sdfr 751184588Sdfr return (xprt); 752184588Sdfr} 753184588Sdfr 754184588Sdfr/* 755184588Sdfr * Free a server transport structure. 756184588Sdfr */ 757184588Sdfrvoid 758184588Sdfrsvc_xprt_free(xprt) 759184588Sdfr SVCXPRT *xprt; 760184588Sdfr{ 761184588Sdfr 762184588Sdfr mem_free(xprt->xp_p3, sizeof(SVCXPRT_EXT)); 763184588Sdfr mem_free(xprt, sizeof(SVCXPRT)); 764184588Sdfr} 765184588Sdfr 766177633Sdfr/* ******************* SERVER INPUT STUFF ******************* */ 767177633Sdfr 768177633Sdfr/* 769184588Sdfr * Read RPC requests from a transport and queue them to be 770184588Sdfr * executed. We handle authentication and replay cache replies here. 771184588Sdfr * Actually dispatching the RPC is deferred till svc_executereq. 772177633Sdfr */ 773184588Sdfrstatic enum xprt_stat 774184588Sdfrsvc_getreq(SVCXPRT *xprt, struct svc_req **rqstp_ret) 775177633Sdfr{ 776177633Sdfr SVCPOOL *pool = xprt->xp_pool; 777184588Sdfr struct svc_req *r; 778177633Sdfr struct rpc_msg msg; 779184588Sdfr struct mbuf *args; 780177633Sdfr enum xprt_stat stat; 781177633Sdfr 782177633Sdfr /* now receive msgs from xprtprt (support batch calls) */ 783184588Sdfr r = malloc(sizeof(*r), M_RPC, M_WAITOK|M_ZERO); 784177633Sdfr 785184588Sdfr msg.rm_call.cb_cred.oa_base = r->rq_credarea; 786184588Sdfr msg.rm_call.cb_verf.oa_base = &r->rq_credarea[MAX_AUTH_BYTES]; 787184588Sdfr r->rq_clntcred = &r->rq_credarea[2*MAX_AUTH_BYTES]; 788184588Sdfr if (SVC_RECV(xprt, &msg, &r->rq_addr, &args)) { 789184588Sdfr enum auth_stat why; 790177633Sdfr 791184588Sdfr /* 792184588Sdfr * Handle replays and authenticate before queuing the 793184588Sdfr * request to be executed. 794184588Sdfr */ 795184588Sdfr SVC_ACQUIRE(xprt); 796184588Sdfr r->rq_xprt = xprt; 797184588Sdfr if (pool->sp_rcache) { 798184588Sdfr struct rpc_msg repmsg; 799184588Sdfr struct mbuf *repbody; 800184588Sdfr enum replay_state rs; 801184588Sdfr rs = replay_find(pool->sp_rcache, &msg, 802184588Sdfr svc_getrpccaller(r), &repmsg, &repbody); 803184588Sdfr switch (rs) { 804184588Sdfr case RS_NEW: 805184588Sdfr break; 806184588Sdfr case RS_DONE: 807184588Sdfr SVC_REPLY(xprt, &repmsg, r->rq_addr, 808184588Sdfr repbody); 809184588Sdfr if (r->rq_addr) { 810184588Sdfr free(r->rq_addr, M_SONAME); 811184588Sdfr r->rq_addr = NULL; 812184588Sdfr } 813177633Sdfr goto call_done; 814184588Sdfr 815184588Sdfr default: 816184588Sdfr goto call_done; 817177633Sdfr } 818184588Sdfr } 819184588Sdfr 820184588Sdfr r->rq_xid = msg.rm_xid; 821184588Sdfr r->rq_prog = msg.rm_call.cb_prog; 822184588Sdfr r->rq_vers = msg.rm_call.cb_vers; 823184588Sdfr r->rq_proc = msg.rm_call.cb_proc; 824184588Sdfr r->rq_size = sizeof(*r) + m_length(args, NULL); 825184588Sdfr r->rq_args = args; 826184588Sdfr if ((why = _authenticate(r, &msg)) != AUTH_OK) { 827177633Sdfr /* 828184588Sdfr * RPCSEC_GSS uses this return code 829184588Sdfr * for requests that form part of its 830184588Sdfr * context establishment protocol and 831184588Sdfr * should not be dispatched to the 832184588Sdfr * application. 833177633Sdfr */ 834184588Sdfr if (why != RPCSEC_GSS_NODISPATCH) 835184588Sdfr svcerr_auth(r, why); 836184588Sdfr goto call_done; 837177633Sdfr } 838184588Sdfr 839184588Sdfr if (!SVCAUTH_UNWRAP(&r->rq_auth, &r->rq_args)) { 840184588Sdfr svcerr_decode(r); 841184588Sdfr goto call_done; 842184588Sdfr } 843184588Sdfr 844177633Sdfr /* 845184588Sdfr * Everything checks out, return request to caller. 846177633Sdfr */ 847184588Sdfr *rqstp_ret = r; 848184588Sdfr r = NULL; 849184588Sdfr } 850177633Sdfrcall_done: 851184588Sdfr if (r) { 852184588Sdfr svc_freereq(r); 853184588Sdfr r = NULL; 854184588Sdfr } 855184588Sdfr if ((stat = SVC_STAT(xprt)) == XPRT_DIED) { 856184588Sdfr xprt_unregister(xprt); 857184588Sdfr } 858184588Sdfr 859184588Sdfr return (stat); 860184588Sdfr} 861184588Sdfr 862184588Sdfrstatic void 863184588Sdfrsvc_executereq(struct svc_req *rqstp) 864184588Sdfr{ 865184588Sdfr SVCXPRT *xprt = rqstp->rq_xprt; 866184588Sdfr SVCPOOL *pool = xprt->xp_pool; 867184588Sdfr int prog_found; 868184588Sdfr rpcvers_t low_vers; 869184588Sdfr rpcvers_t high_vers; 870184588Sdfr struct svc_callout *s; 871184588Sdfr 872184588Sdfr /* now match message with a registered service*/ 873184588Sdfr prog_found = FALSE; 874184588Sdfr low_vers = (rpcvers_t) -1L; 875184588Sdfr high_vers = (rpcvers_t) 0L; 876184588Sdfr TAILQ_FOREACH(s, &pool->sp_callouts, sc_link) { 877184588Sdfr if (s->sc_prog == rqstp->rq_prog) { 878184588Sdfr if (s->sc_vers == rqstp->rq_vers) { 879184588Sdfr /* 880184588Sdfr * We hand ownership of r to the 881184588Sdfr * dispatch method - they must call 882184588Sdfr * svc_freereq. 883184588Sdfr */ 884184588Sdfr (*s->sc_dispatch)(rqstp, xprt); 885184588Sdfr return; 886184588Sdfr } /* found correct version */ 887184588Sdfr prog_found = TRUE; 888184588Sdfr if (s->sc_vers < low_vers) 889184588Sdfr low_vers = s->sc_vers; 890184588Sdfr if (s->sc_vers > high_vers) 891184588Sdfr high_vers = s->sc_vers; 892184588Sdfr } /* found correct program */ 893184588Sdfr } 894184588Sdfr 895184588Sdfr /* 896184588Sdfr * if we got here, the program or version 897184588Sdfr * is not served ... 898184588Sdfr */ 899184588Sdfr if (prog_found) 900184588Sdfr svcerr_progvers(rqstp, low_vers, high_vers); 901184588Sdfr else 902184588Sdfr svcerr_noprog(rqstp); 903184588Sdfr 904184588Sdfr svc_freereq(rqstp); 905184588Sdfr} 906184588Sdfr 907184588Sdfrstatic void 908184588Sdfrsvc_checkidle(SVCPOOL *pool) 909184588Sdfr{ 910184588Sdfr SVCXPRT *xprt, *nxprt; 911184588Sdfr time_t timo; 912184588Sdfr struct svcxprt_list cleanup; 913184588Sdfr 914184588Sdfr TAILQ_INIT(&cleanup); 915184588Sdfr TAILQ_FOREACH_SAFE(xprt, &pool->sp_xlist, xp_link, nxprt) { 916184588Sdfr /* 917184588Sdfr * Only some transports have idle timers. Don't time 918184588Sdfr * something out which is just waking up. 919184588Sdfr */ 920184588Sdfr if (!xprt->xp_idletimeout || xprt->xp_thread) 921184588Sdfr continue; 922184588Sdfr 923184588Sdfr timo = xprt->xp_lastactive + xprt->xp_idletimeout; 924184588Sdfr if (time_uptime > timo) { 925184588Sdfr xprt_unregister_locked(xprt); 926184588Sdfr TAILQ_INSERT_TAIL(&cleanup, xprt, xp_link); 927177633Sdfr } 928184588Sdfr } 929184588Sdfr 930184588Sdfr mtx_unlock(&pool->sp_lock); 931184588Sdfr TAILQ_FOREACH_SAFE(xprt, &cleanup, xp_link, nxprt) { 932184588Sdfr SVC_RELEASE(xprt); 933184588Sdfr } 934184588Sdfr mtx_lock(&pool->sp_lock); 935184588Sdfr 936177633Sdfr} 937177633Sdfr 938184588Sdfrstatic void 939184588Sdfrsvc_assign_waiting_sockets(SVCPOOL *pool) 940177633Sdfr{ 941177633Sdfr SVCXPRT *xprt; 942184588Sdfr 943184588Sdfr TAILQ_FOREACH(xprt, &pool->sp_active, xp_alink) { 944184588Sdfr if (!xprt->xp_thread) { 945184588Sdfr xprt_assignthread(xprt); 946184588Sdfr } 947184588Sdfr } 948184588Sdfr} 949184588Sdfr 950184588Sdfrstatic bool_t 951184588Sdfrsvc_request_space_available(SVCPOOL *pool) 952184588Sdfr{ 953184588Sdfr 954184588Sdfr mtx_assert(&pool->sp_lock, MA_OWNED); 955184588Sdfr 956184588Sdfr if (pool->sp_space_throttled) { 957184588Sdfr /* 958184588Sdfr * Below the low-water yet? If so, assign any waiting sockets. 959184588Sdfr */ 960184588Sdfr if (pool->sp_space_used < pool->sp_space_low) { 961184588Sdfr pool->sp_space_throttled = FALSE; 962184588Sdfr svc_assign_waiting_sockets(pool); 963184588Sdfr return TRUE; 964184588Sdfr } 965184588Sdfr 966184588Sdfr return FALSE; 967184588Sdfr } else { 968184588Sdfr if (pool->sp_space_used 969184588Sdfr >= pool->sp_space_high) { 970184588Sdfr pool->sp_space_throttled = TRUE; 971184588Sdfr pool->sp_space_throttle_count++; 972184588Sdfr return FALSE; 973184588Sdfr } 974184588Sdfr 975184588Sdfr return TRUE; 976184588Sdfr } 977184588Sdfr} 978184588Sdfr 979184588Sdfrstatic void 980184588Sdfrsvc_run_internal(SVCPOOL *pool, bool_t ismaster) 981184588Sdfr{ 982184588Sdfr SVCTHREAD *st, *stpref; 983184588Sdfr SVCXPRT *xprt; 984184588Sdfr enum xprt_stat stat; 985184588Sdfr struct svc_req *rqstp; 986177633Sdfr int error; 987177633Sdfr 988184588Sdfr st = mem_alloc(sizeof(*st)); 989184588Sdfr st->st_xprt = NULL; 990184588Sdfr STAILQ_INIT(&st->st_reqs); 991184588Sdfr cv_init(&st->st_cond, "rpcsvc"); 992184588Sdfr 993177633Sdfr mtx_lock(&pool->sp_lock); 994184588Sdfr LIST_INSERT_HEAD(&pool->sp_threads, st, st_link); 995177633Sdfr 996184588Sdfr /* 997184588Sdfr * If we are a new thread which was spawned to cope with 998184588Sdfr * increased load, set the state back to SVCPOOL_ACTIVE. 999184588Sdfr */ 1000184588Sdfr if (pool->sp_state == SVCPOOL_THREADSTARTING) 1001184588Sdfr pool->sp_state = SVCPOOL_ACTIVE; 1002177633Sdfr 1003184588Sdfr while (pool->sp_state != SVCPOOL_CLOSING) { 1004184588Sdfr /* 1005184588Sdfr * Check for idle transports once per second. 1006184588Sdfr */ 1007184588Sdfr if (time_uptime > pool->sp_lastidlecheck) { 1008184588Sdfr pool->sp_lastidlecheck = time_uptime; 1009184588Sdfr svc_checkidle(pool); 1010184588Sdfr } 1011184588Sdfr 1012184588Sdfr xprt = st->st_xprt; 1013184588Sdfr if (!xprt && STAILQ_EMPTY(&st->st_reqs)) { 1014184588Sdfr /* 1015184588Sdfr * Enforce maxthreads count. 1016184588Sdfr */ 1017184588Sdfr if (pool->sp_threadcount > pool->sp_maxthreads) 1018177633Sdfr break; 1019184588Sdfr 1020184588Sdfr /* 1021184588Sdfr * Before sleeping, see if we can find an 1022184588Sdfr * active transport which isn't being serviced 1023184588Sdfr * by a thread. 1024184588Sdfr */ 1025184588Sdfr if (svc_request_space_available(pool)) { 1026184588Sdfr TAILQ_FOREACH(xprt, &pool->sp_active, 1027184588Sdfr xp_alink) { 1028184588Sdfr if (!xprt->xp_thread) { 1029184588Sdfr SVC_ACQUIRE(xprt); 1030184588Sdfr xprt->xp_thread = st; 1031184588Sdfr st->st_xprt = xprt; 1032184588Sdfr break; 1033184588Sdfr } 1034184588Sdfr } 1035184588Sdfr } 1036184588Sdfr if (st->st_xprt) 1037184588Sdfr continue; 1038184588Sdfr 1039184588Sdfr LIST_INSERT_HEAD(&pool->sp_idlethreads, st, st_ilink); 1040184588Sdfr error = cv_timedwait_sig(&st->st_cond, &pool->sp_lock, 1041184588Sdfr 5 * hz); 1042184588Sdfr LIST_REMOVE(st, st_ilink); 1043184588Sdfr 1044184588Sdfr /* 1045184588Sdfr * Reduce worker thread count when idle. 1046184588Sdfr */ 1047184588Sdfr if (error == EWOULDBLOCK) { 1048184588Sdfr if (!ismaster 1049184588Sdfr && (pool->sp_threadcount 1050184588Sdfr > pool->sp_minthreads) 1051184588Sdfr && !st->st_xprt 1052184588Sdfr && STAILQ_EMPTY(&st->st_reqs)) 1053184588Sdfr break; 1054184588Sdfr } 1055184588Sdfr if (error == EWOULDBLOCK) 1056184588Sdfr continue; 1057184588Sdfr if (error) { 1058184588Sdfr if (pool->sp_state != SVCPOOL_CLOSING) { 1059184588Sdfr mtx_unlock(&pool->sp_lock); 1060184588Sdfr svc_exit(pool); 1061184588Sdfr mtx_lock(&pool->sp_lock); 1062184588Sdfr } 1063184588Sdfr break; 1064184588Sdfr } 1065184588Sdfr 1066184588Sdfr if (pool->sp_state == SVCPOOL_THREADWANTED) { 1067184588Sdfr pool->sp_state = SVCPOOL_THREADSTARTING; 1068184588Sdfr pool->sp_lastcreatetime = time_uptime; 1069184588Sdfr mtx_unlock(&pool->sp_lock); 1070184588Sdfr svc_new_thread(pool); 1071184588Sdfr mtx_lock(&pool->sp_lock); 1072184588Sdfr } 1073177633Sdfr continue; 1074177633Sdfr } 1075177633Sdfr 1076184588Sdfr if (xprt) { 1077184588Sdfr /* 1078184588Sdfr * Drain the transport socket and queue up any 1079184588Sdfr * RPCs. 1080184588Sdfr */ 1081184588Sdfr xprt->xp_lastactive = time_uptime; 1082184588Sdfr stat = XPRT_IDLE; 1083184588Sdfr do { 1084184588Sdfr if (!svc_request_space_available(pool)) 1085184588Sdfr break; 1086184588Sdfr rqstp = NULL; 1087184588Sdfr mtx_unlock(&pool->sp_lock); 1088184588Sdfr stat = svc_getreq(xprt, &rqstp); 1089184588Sdfr mtx_lock(&pool->sp_lock); 1090184588Sdfr if (rqstp) { 1091184588Sdfr /* 1092184588Sdfr * See if the application has 1093184588Sdfr * a preference for some other 1094184588Sdfr * thread. 1095184588Sdfr */ 1096184588Sdfr stpref = st; 1097184588Sdfr if (pool->sp_assign) 1098184588Sdfr stpref = pool->sp_assign(st, 1099184588Sdfr rqstp); 1100184588Sdfr 1101184588Sdfr pool->sp_space_used += 1102184588Sdfr rqstp->rq_size; 1103184588Sdfr if (pool->sp_space_used 1104184588Sdfr > pool->sp_space_used_highest) 1105184588Sdfr pool->sp_space_used_highest = 1106184588Sdfr pool->sp_space_used; 1107184588Sdfr rqstp->rq_thread = stpref; 1108184588Sdfr STAILQ_INSERT_TAIL(&stpref->st_reqs, 1109184588Sdfr rqstp, rq_link); 1110184588Sdfr stpref->st_reqcount++; 1111184588Sdfr 1112184588Sdfr /* 1113184588Sdfr * If we assigned the request 1114184588Sdfr * to another thread, make 1115184588Sdfr * sure its awake and continue 1116184588Sdfr * reading from the 1117184588Sdfr * socket. Otherwise, try to 1118184588Sdfr * find some other thread to 1119184588Sdfr * read from the socket and 1120184588Sdfr * execute the request 1121184588Sdfr * immediately. 1122184588Sdfr */ 1123184588Sdfr if (stpref != st) { 1124184588Sdfr cv_signal(&stpref->st_cond); 1125184588Sdfr continue; 1126184588Sdfr } else { 1127184588Sdfr break; 1128184588Sdfr } 1129184588Sdfr } 1130184588Sdfr } while (stat == XPRT_MOREREQS 1131184588Sdfr && pool->sp_state != SVCPOOL_CLOSING); 1132184588Sdfr 1133184588Sdfr /* 1134184588Sdfr * Move this transport to the end of the 1135184588Sdfr * active list to ensure fairness when 1136184588Sdfr * multiple transports are active. If this was 1137184588Sdfr * the last queued request, svc_getreq will 1138184588Sdfr * end up calling xprt_inactive to remove from 1139184588Sdfr * the active list. 1140184588Sdfr */ 1141184588Sdfr xprt->xp_thread = NULL; 1142184588Sdfr st->st_xprt = NULL; 1143184588Sdfr if (xprt->xp_active) { 1144184588Sdfr xprt_assignthread(xprt); 1145184588Sdfr TAILQ_REMOVE(&pool->sp_active, xprt, xp_alink); 1146184588Sdfr TAILQ_INSERT_TAIL(&pool->sp_active, xprt, 1147184588Sdfr xp_alink); 1148184588Sdfr } 1149184588Sdfr mtx_unlock(&pool->sp_lock); 1150184588Sdfr SVC_RELEASE(xprt); 1151184588Sdfr mtx_lock(&pool->sp_lock); 1152184588Sdfr } 1153184588Sdfr 1154177633Sdfr /* 1155184588Sdfr * Execute what we have queued. 1156177633Sdfr */ 1157184588Sdfr while ((rqstp = STAILQ_FIRST(&st->st_reqs)) != NULL) { 1158184588Sdfr size_t sz = rqstp->rq_size; 1159184588Sdfr mtx_unlock(&pool->sp_lock); 1160184588Sdfr svc_executereq(rqstp); 1161184588Sdfr mtx_lock(&pool->sp_lock); 1162184588Sdfr pool->sp_space_used -= sz; 1163184588Sdfr } 1164184588Sdfr } 1165177633Sdfr 1166184588Sdfr if (st->st_xprt) { 1167184588Sdfr xprt = st->st_xprt; 1168184588Sdfr st->st_xprt = NULL; 1169184588Sdfr SVC_RELEASE(xprt); 1170177633Sdfr } 1171177633Sdfr 1172184588Sdfr KASSERT(STAILQ_EMPTY(&st->st_reqs), ("stray reqs on exit")); 1173184588Sdfr LIST_REMOVE(st, st_link); 1174184588Sdfr pool->sp_threadcount--; 1175184588Sdfr 1176177633Sdfr mtx_unlock(&pool->sp_lock); 1177184588Sdfr 1178184588Sdfr cv_destroy(&st->st_cond); 1179184588Sdfr mem_free(st, sizeof(*st)); 1180184588Sdfr 1181184588Sdfr if (!ismaster) 1182184588Sdfr wakeup(pool); 1183177633Sdfr} 1184177633Sdfr 1185184588Sdfrstatic void 1186184588Sdfrsvc_thread_start(void *arg) 1187184588Sdfr{ 1188184588Sdfr 1189184588Sdfr svc_run_internal((SVCPOOL *) arg, FALSE); 1190184588Sdfr kthread_exit(); 1191184588Sdfr} 1192184588Sdfr 1193184588Sdfrstatic void 1194184588Sdfrsvc_new_thread(SVCPOOL *pool) 1195184588Sdfr{ 1196184588Sdfr struct thread *td; 1197184588Sdfr 1198184588Sdfr pool->sp_threadcount++; 1199184588Sdfr kthread_add(svc_thread_start, pool, 1200184588Sdfr pool->sp_proc, &td, 0, 0, 1201184588Sdfr "%s: service", pool->sp_name); 1202184588Sdfr} 1203184588Sdfr 1204177633Sdfrvoid 1205184588Sdfrsvc_run(SVCPOOL *pool) 1206184588Sdfr{ 1207184588Sdfr int i; 1208184588Sdfr struct proc *p; 1209184588Sdfr struct thread *td; 1210184588Sdfr 1211184588Sdfr p = curproc; 1212184588Sdfr td = curthread; 1213184588Sdfr snprintf(td->td_name, sizeof(td->td_name), 1214184588Sdfr "%s: master", pool->sp_name); 1215184588Sdfr pool->sp_state = SVCPOOL_ACTIVE; 1216184588Sdfr pool->sp_proc = p; 1217184588Sdfr pool->sp_lastcreatetime = time_uptime; 1218184588Sdfr pool->sp_threadcount = 1; 1219184588Sdfr 1220184588Sdfr for (i = 1; i < pool->sp_minthreads; i++) { 1221184588Sdfr svc_new_thread(pool); 1222184588Sdfr } 1223184588Sdfr 1224184588Sdfr svc_run_internal(pool, TRUE); 1225184588Sdfr 1226184588Sdfr mtx_lock(&pool->sp_lock); 1227184588Sdfr while (pool->sp_threadcount > 0) 1228184588Sdfr msleep(pool, &pool->sp_lock, 0, "svcexit", 0); 1229184588Sdfr mtx_unlock(&pool->sp_lock); 1230184588Sdfr} 1231184588Sdfr 1232184588Sdfrvoid 1233177633Sdfrsvc_exit(SVCPOOL *pool) 1234177633Sdfr{ 1235184588Sdfr SVCTHREAD *st; 1236184588Sdfr 1237177633Sdfr mtx_lock(&pool->sp_lock); 1238184588Sdfr 1239184588Sdfr pool->sp_state = SVCPOOL_CLOSING; 1240184588Sdfr LIST_FOREACH(st, &pool->sp_idlethreads, st_ilink) 1241184588Sdfr cv_signal(&st->st_cond); 1242184588Sdfr 1243177633Sdfr mtx_unlock(&pool->sp_lock); 1244177633Sdfr} 1245184588Sdfr 1246184588Sdfrbool_t 1247184588Sdfrsvc_getargs(struct svc_req *rqstp, xdrproc_t xargs, void *args) 1248184588Sdfr{ 1249184588Sdfr struct mbuf *m; 1250184588Sdfr XDR xdrs; 1251184588Sdfr bool_t stat; 1252184588Sdfr 1253184588Sdfr m = rqstp->rq_args; 1254184588Sdfr rqstp->rq_args = NULL; 1255184588Sdfr 1256184588Sdfr xdrmbuf_create(&xdrs, m, XDR_DECODE); 1257184588Sdfr stat = xargs(&xdrs, args); 1258184588Sdfr XDR_DESTROY(&xdrs); 1259184588Sdfr 1260184588Sdfr return (stat); 1261184588Sdfr} 1262184588Sdfr 1263184588Sdfrbool_t 1264184588Sdfrsvc_freeargs(struct svc_req *rqstp, xdrproc_t xargs, void *args) 1265184588Sdfr{ 1266184588Sdfr XDR xdrs; 1267184588Sdfr 1268184588Sdfr if (rqstp->rq_addr) { 1269184588Sdfr free(rqstp->rq_addr, M_SONAME); 1270184588Sdfr rqstp->rq_addr = NULL; 1271184588Sdfr } 1272184588Sdfr 1273184588Sdfr xdrs.x_op = XDR_FREE; 1274184588Sdfr return (xargs(&xdrs, args)); 1275184588Sdfr} 1276184588Sdfr 1277184588Sdfrvoid 1278184588Sdfrsvc_freereq(struct svc_req *rqstp) 1279184588Sdfr{ 1280184588Sdfr SVCTHREAD *st; 1281184588Sdfr SVCXPRT *xprt; 1282184588Sdfr SVCPOOL *pool; 1283184588Sdfr 1284184588Sdfr st = rqstp->rq_thread; 1285184588Sdfr xprt = rqstp->rq_xprt; 1286184588Sdfr if (xprt) 1287184588Sdfr pool = xprt->xp_pool; 1288184588Sdfr else 1289184588Sdfr pool = NULL; 1290184588Sdfr if (st) { 1291184588Sdfr mtx_lock(&pool->sp_lock); 1292184588Sdfr KASSERT(rqstp == STAILQ_FIRST(&st->st_reqs), 1293184588Sdfr ("Freeing request out of order")); 1294184588Sdfr STAILQ_REMOVE_HEAD(&st->st_reqs, rq_link); 1295184588Sdfr st->st_reqcount--; 1296184588Sdfr if (pool->sp_done) 1297184588Sdfr pool->sp_done(st, rqstp); 1298184588Sdfr mtx_unlock(&pool->sp_lock); 1299184588Sdfr } 1300184588Sdfr 1301184588Sdfr if (rqstp->rq_auth.svc_ah_ops) 1302184588Sdfr SVCAUTH_RELEASE(&rqstp->rq_auth); 1303184588Sdfr 1304184588Sdfr if (rqstp->rq_xprt) { 1305184588Sdfr SVC_RELEASE(rqstp->rq_xprt); 1306184588Sdfr } 1307184588Sdfr 1308184588Sdfr if (rqstp->rq_addr) 1309184588Sdfr free(rqstp->rq_addr, M_SONAME); 1310184588Sdfr 1311184588Sdfr if (rqstp->rq_args) 1312184588Sdfr m_freem(rqstp->rq_args); 1313184588Sdfr 1314184588Sdfr free(rqstp, M_RPC); 1315184588Sdfr} 1316