svc.c revision 193603
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 193603 2009-06-07 01:06:56Z 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 296177633Sdfr if (xprt->xp_active) { 297177633Sdfr TAILQ_REMOVE(&pool->sp_active, xprt, xp_alink); 298177633Sdfr xprt->xp_active = FALSE; 299177633Sdfr } 300177633Sdfr TAILQ_REMOVE(&pool->sp_xlist, xprt, xp_link); 301177633Sdfr xprt->xp_registered = FALSE; 302184588Sdfr} 303177633Sdfr 304184588Sdfrvoid 305184588Sdfrxprt_unregister(SVCXPRT *xprt) 306184588Sdfr{ 307184588Sdfr SVCPOOL *pool = xprt->xp_pool; 308184588Sdfr 309184588Sdfr mtx_lock(&pool->sp_lock); 310184588Sdfr xprt_unregister_locked(xprt); 311184588Sdfr mtx_unlock(&pool->sp_lock); 312184588Sdfr 313184588Sdfr SVC_RELEASE(xprt); 314177633Sdfr} 315177633Sdfr 316184588Sdfrstatic void 317184588Sdfrxprt_assignthread(SVCXPRT *xprt) 318184588Sdfr{ 319184588Sdfr SVCPOOL *pool = xprt->xp_pool; 320184588Sdfr SVCTHREAD *st; 321184588Sdfr 322184588Sdfr /* 323184588Sdfr * Attempt to assign a service thread to this 324184588Sdfr * transport. 325184588Sdfr */ 326184588Sdfr LIST_FOREACH(st, &pool->sp_idlethreads, st_ilink) { 327184588Sdfr if (st->st_xprt == NULL && STAILQ_EMPTY(&st->st_reqs)) 328184588Sdfr break; 329184588Sdfr } 330184588Sdfr if (st) { 331184588Sdfr SVC_ACQUIRE(xprt); 332184588Sdfr xprt->xp_thread = st; 333184588Sdfr st->st_xprt = xprt; 334184588Sdfr cv_signal(&st->st_cond); 335184588Sdfr } else { 336184588Sdfr /* 337184588Sdfr * See if we can create a new thread. The 338184588Sdfr * actual thread creation happens in 339184588Sdfr * svc_run_internal because our locking state 340184588Sdfr * is poorly defined (we are typically called 341184588Sdfr * from a socket upcall). Don't create more 342184588Sdfr * than one thread per second. 343184588Sdfr */ 344184588Sdfr if (pool->sp_state == SVCPOOL_ACTIVE 345184588Sdfr && pool->sp_lastcreatetime < time_uptime 346184588Sdfr && pool->sp_threadcount < pool->sp_maxthreads) { 347184588Sdfr pool->sp_state = SVCPOOL_THREADWANTED; 348184588Sdfr } 349184588Sdfr } 350184588Sdfr} 351184588Sdfr 352177633Sdfrvoid 353177633Sdfrxprt_active(SVCXPRT *xprt) 354177633Sdfr{ 355177633Sdfr SVCPOOL *pool = xprt->xp_pool; 356177633Sdfr 357193436Srmacklem mtx_lock(&pool->sp_lock); 358193436Srmacklem 359184588Sdfr if (!xprt->xp_registered) { 360184588Sdfr /* 361184588Sdfr * Race with xprt_unregister - we lose. 362184588Sdfr */ 363193436Srmacklem mtx_unlock(&pool->sp_lock); 364184588Sdfr return; 365184588Sdfr } 366184588Sdfr 367177633Sdfr if (!xprt->xp_active) { 368177633Sdfr TAILQ_INSERT_TAIL(&pool->sp_active, xprt, xp_alink); 369177633Sdfr xprt->xp_active = TRUE; 370184588Sdfr xprt_assignthread(xprt); 371177633Sdfr } 372177633Sdfr 373177633Sdfr mtx_unlock(&pool->sp_lock); 374177633Sdfr} 375177633Sdfr 376177633Sdfrvoid 377184588Sdfrxprt_inactive_locked(SVCXPRT *xprt) 378177633Sdfr{ 379177633Sdfr SVCPOOL *pool = xprt->xp_pool; 380177633Sdfr 381177633Sdfr if (xprt->xp_active) { 382177633Sdfr TAILQ_REMOVE(&pool->sp_active, xprt, xp_alink); 383177633Sdfr xprt->xp_active = FALSE; 384177633Sdfr } 385184588Sdfr} 386177633Sdfr 387184588Sdfrvoid 388184588Sdfrxprt_inactive(SVCXPRT *xprt) 389184588Sdfr{ 390184588Sdfr SVCPOOL *pool = xprt->xp_pool; 391184588Sdfr 392184588Sdfr mtx_lock(&pool->sp_lock); 393184588Sdfr xprt_inactive_locked(xprt); 394177633Sdfr mtx_unlock(&pool->sp_lock); 395177633Sdfr} 396177633Sdfr 397177633Sdfr/* 398177633Sdfr * Add a service program to the callout list. 399177633Sdfr * The dispatch routine will be called when a rpc request for this 400177633Sdfr * program number comes in. 401177633Sdfr */ 402177633Sdfrbool_t 403177633Sdfrsvc_reg(SVCXPRT *xprt, const rpcprog_t prog, const rpcvers_t vers, 404177633Sdfr void (*dispatch)(struct svc_req *, SVCXPRT *), 405177633Sdfr const struct netconfig *nconf) 406177633Sdfr{ 407177633Sdfr SVCPOOL *pool = xprt->xp_pool; 408177633Sdfr struct svc_callout *s; 409177633Sdfr char *netid = NULL; 410177633Sdfr int flag = 0; 411177633Sdfr 412177633Sdfr/* VARIABLES PROTECTED BY svc_lock: s, svc_head */ 413177633Sdfr 414177633Sdfr if (xprt->xp_netid) { 415177633Sdfr netid = strdup(xprt->xp_netid, M_RPC); 416177633Sdfr flag = 1; 417177633Sdfr } else if (nconf && nconf->nc_netid) { 418177633Sdfr netid = strdup(nconf->nc_netid, M_RPC); 419177633Sdfr flag = 1; 420177633Sdfr } /* must have been created with svc_raw_create */ 421177633Sdfr if ((netid == NULL) && (flag == 1)) { 422177633Sdfr return (FALSE); 423177633Sdfr } 424177633Sdfr 425177633Sdfr mtx_lock(&pool->sp_lock); 426177633Sdfr if ((s = svc_find(pool, prog, vers, netid)) != NULL) { 427177633Sdfr if (netid) 428177633Sdfr free(netid, M_RPC); 429177633Sdfr if (s->sc_dispatch == dispatch) 430177633Sdfr goto rpcb_it; /* he is registering another xptr */ 431177633Sdfr mtx_unlock(&pool->sp_lock); 432177633Sdfr return (FALSE); 433177633Sdfr } 434177633Sdfr s = malloc(sizeof (struct svc_callout), M_RPC, M_NOWAIT); 435177633Sdfr if (s == NULL) { 436177633Sdfr if (netid) 437177633Sdfr free(netid, M_RPC); 438177633Sdfr mtx_unlock(&pool->sp_lock); 439177633Sdfr return (FALSE); 440177633Sdfr } 441177633Sdfr 442177633Sdfr s->sc_prog = prog; 443177633Sdfr s->sc_vers = vers; 444177633Sdfr s->sc_dispatch = dispatch; 445177633Sdfr s->sc_netid = netid; 446177633Sdfr TAILQ_INSERT_TAIL(&pool->sp_callouts, s, sc_link); 447177633Sdfr 448177633Sdfr if ((xprt->xp_netid == NULL) && (flag == 1) && netid) 449177633Sdfr ((SVCXPRT *) xprt)->xp_netid = strdup(netid, M_RPC); 450177633Sdfr 451177633Sdfrrpcb_it: 452177633Sdfr mtx_unlock(&pool->sp_lock); 453177633Sdfr /* now register the information with the local binder service */ 454177633Sdfr if (nconf) { 455177633Sdfr bool_t dummy; 456177633Sdfr struct netconfig tnc; 457184588Sdfr struct netbuf nb; 458177633Sdfr tnc = *nconf; 459184588Sdfr nb.buf = &xprt->xp_ltaddr; 460184588Sdfr nb.len = xprt->xp_ltaddr.ss_len; 461184588Sdfr dummy = rpcb_set(prog, vers, &tnc, &nb); 462177633Sdfr return (dummy); 463177633Sdfr } 464177633Sdfr return (TRUE); 465177633Sdfr} 466177633Sdfr 467177633Sdfr/* 468177633Sdfr * Remove a service program from the callout list. 469177633Sdfr */ 470177633Sdfrvoid 471177633Sdfrsvc_unreg(SVCPOOL *pool, const rpcprog_t prog, const rpcvers_t vers) 472177633Sdfr{ 473177633Sdfr struct svc_callout *s; 474177633Sdfr 475177633Sdfr /* unregister the information anyway */ 476177633Sdfr (void) rpcb_unset(prog, vers, NULL); 477177633Sdfr mtx_lock(&pool->sp_lock); 478177633Sdfr while ((s = svc_find(pool, prog, vers, NULL)) != NULL) { 479177633Sdfr TAILQ_REMOVE(&pool->sp_callouts, s, sc_link); 480177633Sdfr if (s->sc_netid) 481177633Sdfr mem_free(s->sc_netid, sizeof (s->sc_netid) + 1); 482177633Sdfr mem_free(s, sizeof (struct svc_callout)); 483177633Sdfr } 484177633Sdfr mtx_unlock(&pool->sp_lock); 485177633Sdfr} 486177633Sdfr 487177633Sdfr/* ********************** CALLOUT list related stuff ************* */ 488177633Sdfr 489177633Sdfr/* 490177633Sdfr * Search the callout list for a program number, return the callout 491177633Sdfr * struct. 492177633Sdfr */ 493177633Sdfrstatic struct svc_callout * 494177633Sdfrsvc_find(SVCPOOL *pool, rpcprog_t prog, rpcvers_t vers, char *netid) 495177633Sdfr{ 496177633Sdfr struct svc_callout *s; 497177633Sdfr 498177633Sdfr mtx_assert(&pool->sp_lock, MA_OWNED); 499177633Sdfr TAILQ_FOREACH(s, &pool->sp_callouts, sc_link) { 500177633Sdfr if (s->sc_prog == prog && s->sc_vers == vers 501177633Sdfr && (netid == NULL || s->sc_netid == NULL || 502177633Sdfr strcmp(netid, s->sc_netid) == 0)) 503177633Sdfr break; 504177633Sdfr } 505177633Sdfr 506177633Sdfr return (s); 507177633Sdfr} 508177633Sdfr 509177633Sdfr/* ******************* REPLY GENERATION ROUTINES ************ */ 510177633Sdfr 511184588Sdfrstatic bool_t 512184588Sdfrsvc_sendreply_common(struct svc_req *rqstp, struct rpc_msg *rply, 513184588Sdfr struct mbuf *body) 514184588Sdfr{ 515184588Sdfr SVCXPRT *xprt = rqstp->rq_xprt; 516184588Sdfr bool_t ok; 517184588Sdfr 518184588Sdfr if (rqstp->rq_args) { 519184588Sdfr m_freem(rqstp->rq_args); 520184588Sdfr rqstp->rq_args = NULL; 521184588Sdfr } 522184588Sdfr 523184588Sdfr if (xprt->xp_pool->sp_rcache) 524184588Sdfr replay_setreply(xprt->xp_pool->sp_rcache, 525184588Sdfr rply, svc_getrpccaller(rqstp), body); 526184588Sdfr 527184588Sdfr if (!SVCAUTH_WRAP(&rqstp->rq_auth, &body)) 528184588Sdfr return (FALSE); 529184588Sdfr 530184588Sdfr ok = SVC_REPLY(xprt, rply, rqstp->rq_addr, body); 531184588Sdfr if (rqstp->rq_addr) { 532184588Sdfr free(rqstp->rq_addr, M_SONAME); 533184588Sdfr rqstp->rq_addr = NULL; 534184588Sdfr } 535184588Sdfr 536184588Sdfr return (ok); 537184588Sdfr} 538184588Sdfr 539177633Sdfr/* 540177633Sdfr * Send a reply to an rpc request 541177633Sdfr */ 542177633Sdfrbool_t 543184588Sdfrsvc_sendreply(struct svc_req *rqstp, xdrproc_t xdr_results, void * xdr_location) 544177633Sdfr{ 545177633Sdfr struct rpc_msg rply; 546184588Sdfr struct mbuf *m; 547184588Sdfr XDR xdrs; 548184588Sdfr bool_t ok; 549177633Sdfr 550184588Sdfr rply.rm_xid = rqstp->rq_xid; 551177633Sdfr rply.rm_direction = REPLY; 552177633Sdfr rply.rm_reply.rp_stat = MSG_ACCEPTED; 553184588Sdfr rply.acpted_rply.ar_verf = rqstp->rq_verf; 554177633Sdfr rply.acpted_rply.ar_stat = SUCCESS; 555184588Sdfr rply.acpted_rply.ar_results.where = NULL; 556184588Sdfr rply.acpted_rply.ar_results.proc = (xdrproc_t) xdr_void; 557177633Sdfr 558184588Sdfr MGET(m, M_WAIT, MT_DATA); 559184588Sdfr MCLGET(m, M_WAIT); 560184588Sdfr m->m_len = 0; 561184588Sdfr xdrmbuf_create(&xdrs, m, XDR_ENCODE); 562184588Sdfr ok = xdr_results(&xdrs, xdr_location); 563184588Sdfr XDR_DESTROY(&xdrs); 564184588Sdfr 565184588Sdfr if (ok) { 566184588Sdfr return (svc_sendreply_common(rqstp, &rply, m)); 567184588Sdfr } else { 568184588Sdfr m_freem(m); 569184588Sdfr return (FALSE); 570184588Sdfr } 571177633Sdfr} 572177633Sdfr 573184588Sdfrbool_t 574184588Sdfrsvc_sendreply_mbuf(struct svc_req *rqstp, struct mbuf *m) 575184588Sdfr{ 576184588Sdfr struct rpc_msg rply; 577184588Sdfr 578184588Sdfr rply.rm_xid = rqstp->rq_xid; 579184588Sdfr rply.rm_direction = REPLY; 580184588Sdfr rply.rm_reply.rp_stat = MSG_ACCEPTED; 581184588Sdfr rply.acpted_rply.ar_verf = rqstp->rq_verf; 582184588Sdfr rply.acpted_rply.ar_stat = SUCCESS; 583184588Sdfr rply.acpted_rply.ar_results.where = NULL; 584184588Sdfr rply.acpted_rply.ar_results.proc = (xdrproc_t) xdr_void; 585184588Sdfr 586184588Sdfr return (svc_sendreply_common(rqstp, &rply, m)); 587184588Sdfr} 588184588Sdfr 589177633Sdfr/* 590177633Sdfr * No procedure error reply 591177633Sdfr */ 592177633Sdfrvoid 593184588Sdfrsvcerr_noproc(struct svc_req *rqstp) 594177633Sdfr{ 595184588Sdfr SVCXPRT *xprt = rqstp->rq_xprt; 596177633Sdfr struct rpc_msg rply; 597177633Sdfr 598184588Sdfr rply.rm_xid = rqstp->rq_xid; 599177633Sdfr rply.rm_direction = REPLY; 600177633Sdfr rply.rm_reply.rp_stat = MSG_ACCEPTED; 601184588Sdfr rply.acpted_rply.ar_verf = rqstp->rq_verf; 602177633Sdfr rply.acpted_rply.ar_stat = PROC_UNAVAIL; 603177633Sdfr 604184588Sdfr if (xprt->xp_pool->sp_rcache) 605184588Sdfr replay_setreply(xprt->xp_pool->sp_rcache, 606184588Sdfr &rply, svc_getrpccaller(rqstp), NULL); 607184588Sdfr 608184588Sdfr svc_sendreply_common(rqstp, &rply, NULL); 609177633Sdfr} 610177633Sdfr 611177633Sdfr/* 612177633Sdfr * Can't decode args error reply 613177633Sdfr */ 614177633Sdfrvoid 615184588Sdfrsvcerr_decode(struct svc_req *rqstp) 616177633Sdfr{ 617184588Sdfr SVCXPRT *xprt = rqstp->rq_xprt; 618177633Sdfr struct rpc_msg rply; 619177633Sdfr 620184588Sdfr rply.rm_xid = rqstp->rq_xid; 621177633Sdfr rply.rm_direction = REPLY; 622177633Sdfr rply.rm_reply.rp_stat = MSG_ACCEPTED; 623184588Sdfr rply.acpted_rply.ar_verf = rqstp->rq_verf; 624177633Sdfr rply.acpted_rply.ar_stat = GARBAGE_ARGS; 625177633Sdfr 626184588Sdfr if (xprt->xp_pool->sp_rcache) 627184588Sdfr replay_setreply(xprt->xp_pool->sp_rcache, 628184588Sdfr &rply, (struct sockaddr *) &xprt->xp_rtaddr, NULL); 629184588Sdfr 630184588Sdfr svc_sendreply_common(rqstp, &rply, NULL); 631177633Sdfr} 632177633Sdfr 633177633Sdfr/* 634177633Sdfr * Some system error 635177633Sdfr */ 636177633Sdfrvoid 637184588Sdfrsvcerr_systemerr(struct svc_req *rqstp) 638177633Sdfr{ 639184588Sdfr SVCXPRT *xprt = rqstp->rq_xprt; 640177633Sdfr struct rpc_msg rply; 641177633Sdfr 642184588Sdfr rply.rm_xid = rqstp->rq_xid; 643177633Sdfr rply.rm_direction = REPLY; 644177633Sdfr rply.rm_reply.rp_stat = MSG_ACCEPTED; 645184588Sdfr rply.acpted_rply.ar_verf = rqstp->rq_verf; 646177633Sdfr rply.acpted_rply.ar_stat = SYSTEM_ERR; 647177633Sdfr 648184588Sdfr if (xprt->xp_pool->sp_rcache) 649184588Sdfr replay_setreply(xprt->xp_pool->sp_rcache, 650184588Sdfr &rply, svc_getrpccaller(rqstp), NULL); 651184588Sdfr 652184588Sdfr svc_sendreply_common(rqstp, &rply, NULL); 653177633Sdfr} 654177633Sdfr 655177633Sdfr/* 656177633Sdfr * Authentication error reply 657177633Sdfr */ 658177633Sdfrvoid 659184588Sdfrsvcerr_auth(struct svc_req *rqstp, enum auth_stat why) 660177633Sdfr{ 661184588Sdfr SVCXPRT *xprt = rqstp->rq_xprt; 662177633Sdfr struct rpc_msg rply; 663177633Sdfr 664184588Sdfr rply.rm_xid = rqstp->rq_xid; 665177633Sdfr rply.rm_direction = REPLY; 666177633Sdfr rply.rm_reply.rp_stat = MSG_DENIED; 667177633Sdfr rply.rjcted_rply.rj_stat = AUTH_ERROR; 668177633Sdfr rply.rjcted_rply.rj_why = why; 669177633Sdfr 670184588Sdfr if (xprt->xp_pool->sp_rcache) 671184588Sdfr replay_setreply(xprt->xp_pool->sp_rcache, 672184588Sdfr &rply, svc_getrpccaller(rqstp), NULL); 673184588Sdfr 674184588Sdfr svc_sendreply_common(rqstp, &rply, NULL); 675177633Sdfr} 676177633Sdfr 677177633Sdfr/* 678177633Sdfr * Auth too weak error reply 679177633Sdfr */ 680177633Sdfrvoid 681184588Sdfrsvcerr_weakauth(struct svc_req *rqstp) 682177633Sdfr{ 683177633Sdfr 684184588Sdfr svcerr_auth(rqstp, AUTH_TOOWEAK); 685177633Sdfr} 686177633Sdfr 687177633Sdfr/* 688177633Sdfr * Program unavailable error reply 689177633Sdfr */ 690177633Sdfrvoid 691184588Sdfrsvcerr_noprog(struct svc_req *rqstp) 692177633Sdfr{ 693184588Sdfr SVCXPRT *xprt = rqstp->rq_xprt; 694177633Sdfr struct rpc_msg rply; 695177633Sdfr 696184588Sdfr rply.rm_xid = rqstp->rq_xid; 697177633Sdfr rply.rm_direction = REPLY; 698177633Sdfr rply.rm_reply.rp_stat = MSG_ACCEPTED; 699184588Sdfr rply.acpted_rply.ar_verf = rqstp->rq_verf; 700177633Sdfr rply.acpted_rply.ar_stat = PROG_UNAVAIL; 701177633Sdfr 702184588Sdfr if (xprt->xp_pool->sp_rcache) 703184588Sdfr replay_setreply(xprt->xp_pool->sp_rcache, 704184588Sdfr &rply, svc_getrpccaller(rqstp), NULL); 705184588Sdfr 706184588Sdfr svc_sendreply_common(rqstp, &rply, NULL); 707177633Sdfr} 708177633Sdfr 709177633Sdfr/* 710177633Sdfr * Program version mismatch error reply 711177633Sdfr */ 712177633Sdfrvoid 713184588Sdfrsvcerr_progvers(struct svc_req *rqstp, rpcvers_t low_vers, rpcvers_t high_vers) 714177633Sdfr{ 715184588Sdfr SVCXPRT *xprt = rqstp->rq_xprt; 716177633Sdfr struct rpc_msg rply; 717177633Sdfr 718184588Sdfr rply.rm_xid = rqstp->rq_xid; 719177633Sdfr rply.rm_direction = REPLY; 720177633Sdfr rply.rm_reply.rp_stat = MSG_ACCEPTED; 721184588Sdfr rply.acpted_rply.ar_verf = rqstp->rq_verf; 722177633Sdfr rply.acpted_rply.ar_stat = PROG_MISMATCH; 723177633Sdfr rply.acpted_rply.ar_vers.low = (uint32_t)low_vers; 724177633Sdfr rply.acpted_rply.ar_vers.high = (uint32_t)high_vers; 725177633Sdfr 726184588Sdfr if (xprt->xp_pool->sp_rcache) 727184588Sdfr replay_setreply(xprt->xp_pool->sp_rcache, 728184588Sdfr &rply, svc_getrpccaller(rqstp), NULL); 729184588Sdfr 730184588Sdfr svc_sendreply_common(rqstp, &rply, NULL); 731177633Sdfr} 732177633Sdfr 733184588Sdfr/* 734184588Sdfr * Allocate a new server transport structure. All fields are 735184588Sdfr * initialized to zero and xp_p3 is initialized to point at an 736184588Sdfr * extension structure to hold various flags and authentication 737184588Sdfr * parameters. 738184588Sdfr */ 739184588SdfrSVCXPRT * 740184588Sdfrsvc_xprt_alloc() 741184588Sdfr{ 742184588Sdfr SVCXPRT *xprt; 743184588Sdfr SVCXPRT_EXT *ext; 744184588Sdfr 745184588Sdfr xprt = mem_alloc(sizeof(SVCXPRT)); 746184588Sdfr memset(xprt, 0, sizeof(SVCXPRT)); 747184588Sdfr ext = mem_alloc(sizeof(SVCXPRT_EXT)); 748184588Sdfr memset(ext, 0, sizeof(SVCXPRT_EXT)); 749184588Sdfr xprt->xp_p3 = ext; 750184588Sdfr refcount_init(&xprt->xp_refs, 1); 751184588Sdfr 752184588Sdfr return (xprt); 753184588Sdfr} 754184588Sdfr 755184588Sdfr/* 756184588Sdfr * Free a server transport structure. 757184588Sdfr */ 758184588Sdfrvoid 759184588Sdfrsvc_xprt_free(xprt) 760184588Sdfr SVCXPRT *xprt; 761184588Sdfr{ 762184588Sdfr 763184588Sdfr mem_free(xprt->xp_p3, sizeof(SVCXPRT_EXT)); 764184588Sdfr mem_free(xprt, sizeof(SVCXPRT)); 765184588Sdfr} 766184588Sdfr 767177633Sdfr/* ******************* SERVER INPUT STUFF ******************* */ 768177633Sdfr 769177633Sdfr/* 770184588Sdfr * Read RPC requests from a transport and queue them to be 771184588Sdfr * executed. We handle authentication and replay cache replies here. 772184588Sdfr * Actually dispatching the RPC is deferred till svc_executereq. 773177633Sdfr */ 774184588Sdfrstatic enum xprt_stat 775184588Sdfrsvc_getreq(SVCXPRT *xprt, struct svc_req **rqstp_ret) 776177633Sdfr{ 777177633Sdfr SVCPOOL *pool = xprt->xp_pool; 778184588Sdfr struct svc_req *r; 779177633Sdfr struct rpc_msg msg; 780184588Sdfr struct mbuf *args; 781177633Sdfr enum xprt_stat stat; 782177633Sdfr 783177633Sdfr /* now receive msgs from xprtprt (support batch calls) */ 784184588Sdfr r = malloc(sizeof(*r), M_RPC, M_WAITOK|M_ZERO); 785177633Sdfr 786184588Sdfr msg.rm_call.cb_cred.oa_base = r->rq_credarea; 787184588Sdfr msg.rm_call.cb_verf.oa_base = &r->rq_credarea[MAX_AUTH_BYTES]; 788184588Sdfr r->rq_clntcred = &r->rq_credarea[2*MAX_AUTH_BYTES]; 789184588Sdfr if (SVC_RECV(xprt, &msg, &r->rq_addr, &args)) { 790184588Sdfr enum auth_stat why; 791177633Sdfr 792184588Sdfr /* 793184588Sdfr * Handle replays and authenticate before queuing the 794184588Sdfr * request to be executed. 795184588Sdfr */ 796184588Sdfr SVC_ACQUIRE(xprt); 797184588Sdfr r->rq_xprt = xprt; 798184588Sdfr if (pool->sp_rcache) { 799184588Sdfr struct rpc_msg repmsg; 800184588Sdfr struct mbuf *repbody; 801184588Sdfr enum replay_state rs; 802184588Sdfr rs = replay_find(pool->sp_rcache, &msg, 803184588Sdfr svc_getrpccaller(r), &repmsg, &repbody); 804184588Sdfr switch (rs) { 805184588Sdfr case RS_NEW: 806184588Sdfr break; 807184588Sdfr case RS_DONE: 808184588Sdfr SVC_REPLY(xprt, &repmsg, r->rq_addr, 809184588Sdfr repbody); 810184588Sdfr if (r->rq_addr) { 811184588Sdfr free(r->rq_addr, M_SONAME); 812184588Sdfr r->rq_addr = NULL; 813184588Sdfr } 814177633Sdfr goto call_done; 815184588Sdfr 816184588Sdfr default: 817184588Sdfr goto call_done; 818177633Sdfr } 819184588Sdfr } 820184588Sdfr 821184588Sdfr r->rq_xid = msg.rm_xid; 822184588Sdfr r->rq_prog = msg.rm_call.cb_prog; 823184588Sdfr r->rq_vers = msg.rm_call.cb_vers; 824184588Sdfr r->rq_proc = msg.rm_call.cb_proc; 825184588Sdfr r->rq_size = sizeof(*r) + m_length(args, NULL); 826184588Sdfr r->rq_args = args; 827184588Sdfr if ((why = _authenticate(r, &msg)) != AUTH_OK) { 828177633Sdfr /* 829184588Sdfr * RPCSEC_GSS uses this return code 830184588Sdfr * for requests that form part of its 831184588Sdfr * context establishment protocol and 832184588Sdfr * should not be dispatched to the 833184588Sdfr * application. 834177633Sdfr */ 835184588Sdfr if (why != RPCSEC_GSS_NODISPATCH) 836184588Sdfr svcerr_auth(r, why); 837184588Sdfr goto call_done; 838177633Sdfr } 839184588Sdfr 840184588Sdfr if (!SVCAUTH_UNWRAP(&r->rq_auth, &r->rq_args)) { 841184588Sdfr svcerr_decode(r); 842184588Sdfr goto call_done; 843184588Sdfr } 844184588Sdfr 845177633Sdfr /* 846184588Sdfr * Everything checks out, return request to caller. 847177633Sdfr */ 848184588Sdfr *rqstp_ret = r; 849184588Sdfr r = NULL; 850184588Sdfr } 851177633Sdfrcall_done: 852184588Sdfr if (r) { 853184588Sdfr svc_freereq(r); 854184588Sdfr r = NULL; 855184588Sdfr } 856184588Sdfr if ((stat = SVC_STAT(xprt)) == XPRT_DIED) { 857184588Sdfr xprt_unregister(xprt); 858184588Sdfr } 859184588Sdfr 860184588Sdfr return (stat); 861184588Sdfr} 862184588Sdfr 863184588Sdfrstatic void 864184588Sdfrsvc_executereq(struct svc_req *rqstp) 865184588Sdfr{ 866184588Sdfr SVCXPRT *xprt = rqstp->rq_xprt; 867184588Sdfr SVCPOOL *pool = xprt->xp_pool; 868184588Sdfr int prog_found; 869184588Sdfr rpcvers_t low_vers; 870184588Sdfr rpcvers_t high_vers; 871184588Sdfr struct svc_callout *s; 872184588Sdfr 873184588Sdfr /* now match message with a registered service*/ 874184588Sdfr prog_found = FALSE; 875184588Sdfr low_vers = (rpcvers_t) -1L; 876184588Sdfr high_vers = (rpcvers_t) 0L; 877184588Sdfr TAILQ_FOREACH(s, &pool->sp_callouts, sc_link) { 878184588Sdfr if (s->sc_prog == rqstp->rq_prog) { 879184588Sdfr if (s->sc_vers == rqstp->rq_vers) { 880184588Sdfr /* 881184588Sdfr * We hand ownership of r to the 882184588Sdfr * dispatch method - they must call 883184588Sdfr * svc_freereq. 884184588Sdfr */ 885184588Sdfr (*s->sc_dispatch)(rqstp, xprt); 886184588Sdfr return; 887184588Sdfr } /* found correct version */ 888184588Sdfr prog_found = TRUE; 889184588Sdfr if (s->sc_vers < low_vers) 890184588Sdfr low_vers = s->sc_vers; 891184588Sdfr if (s->sc_vers > high_vers) 892184588Sdfr high_vers = s->sc_vers; 893184588Sdfr } /* found correct program */ 894184588Sdfr } 895184588Sdfr 896184588Sdfr /* 897184588Sdfr * if we got here, the program or version 898184588Sdfr * is not served ... 899184588Sdfr */ 900184588Sdfr if (prog_found) 901184588Sdfr svcerr_progvers(rqstp, low_vers, high_vers); 902184588Sdfr else 903184588Sdfr svcerr_noprog(rqstp); 904184588Sdfr 905184588Sdfr svc_freereq(rqstp); 906184588Sdfr} 907184588Sdfr 908184588Sdfrstatic void 909184588Sdfrsvc_checkidle(SVCPOOL *pool) 910184588Sdfr{ 911184588Sdfr SVCXPRT *xprt, *nxprt; 912184588Sdfr time_t timo; 913184588Sdfr struct svcxprt_list cleanup; 914184588Sdfr 915184588Sdfr TAILQ_INIT(&cleanup); 916184588Sdfr TAILQ_FOREACH_SAFE(xprt, &pool->sp_xlist, xp_link, nxprt) { 917184588Sdfr /* 918184588Sdfr * Only some transports have idle timers. Don't time 919184588Sdfr * something out which is just waking up. 920184588Sdfr */ 921184588Sdfr if (!xprt->xp_idletimeout || xprt->xp_thread) 922184588Sdfr continue; 923184588Sdfr 924184588Sdfr timo = xprt->xp_lastactive + xprt->xp_idletimeout; 925184588Sdfr if (time_uptime > timo) { 926184588Sdfr xprt_unregister_locked(xprt); 927184588Sdfr TAILQ_INSERT_TAIL(&cleanup, xprt, xp_link); 928177633Sdfr } 929184588Sdfr } 930184588Sdfr 931184588Sdfr mtx_unlock(&pool->sp_lock); 932184588Sdfr TAILQ_FOREACH_SAFE(xprt, &cleanup, xp_link, nxprt) { 933184588Sdfr SVC_RELEASE(xprt); 934184588Sdfr } 935184588Sdfr mtx_lock(&pool->sp_lock); 936184588Sdfr 937177633Sdfr} 938177633Sdfr 939184588Sdfrstatic void 940184588Sdfrsvc_assign_waiting_sockets(SVCPOOL *pool) 941177633Sdfr{ 942177633Sdfr SVCXPRT *xprt; 943184588Sdfr 944184588Sdfr TAILQ_FOREACH(xprt, &pool->sp_active, xp_alink) { 945184588Sdfr if (!xprt->xp_thread) { 946184588Sdfr xprt_assignthread(xprt); 947184588Sdfr } 948184588Sdfr } 949184588Sdfr} 950184588Sdfr 951184588Sdfrstatic bool_t 952184588Sdfrsvc_request_space_available(SVCPOOL *pool) 953184588Sdfr{ 954184588Sdfr 955184588Sdfr mtx_assert(&pool->sp_lock, MA_OWNED); 956184588Sdfr 957184588Sdfr if (pool->sp_space_throttled) { 958184588Sdfr /* 959184588Sdfr * Below the low-water yet? If so, assign any waiting sockets. 960184588Sdfr */ 961184588Sdfr if (pool->sp_space_used < pool->sp_space_low) { 962184588Sdfr pool->sp_space_throttled = FALSE; 963184588Sdfr svc_assign_waiting_sockets(pool); 964184588Sdfr return TRUE; 965184588Sdfr } 966184588Sdfr 967184588Sdfr return FALSE; 968184588Sdfr } else { 969184588Sdfr if (pool->sp_space_used 970184588Sdfr >= pool->sp_space_high) { 971184588Sdfr pool->sp_space_throttled = TRUE; 972184588Sdfr pool->sp_space_throttle_count++; 973184588Sdfr return FALSE; 974184588Sdfr } 975184588Sdfr 976184588Sdfr return TRUE; 977184588Sdfr } 978184588Sdfr} 979184588Sdfr 980184588Sdfrstatic void 981184588Sdfrsvc_run_internal(SVCPOOL *pool, bool_t ismaster) 982184588Sdfr{ 983184588Sdfr SVCTHREAD *st, *stpref; 984184588Sdfr SVCXPRT *xprt; 985184588Sdfr enum xprt_stat stat; 986184588Sdfr struct svc_req *rqstp; 987177633Sdfr int error; 988177633Sdfr 989184588Sdfr st = mem_alloc(sizeof(*st)); 990184588Sdfr st->st_xprt = NULL; 991184588Sdfr STAILQ_INIT(&st->st_reqs); 992184588Sdfr cv_init(&st->st_cond, "rpcsvc"); 993184588Sdfr 994177633Sdfr mtx_lock(&pool->sp_lock); 995184588Sdfr LIST_INSERT_HEAD(&pool->sp_threads, st, st_link); 996177633Sdfr 997184588Sdfr /* 998184588Sdfr * If we are a new thread which was spawned to cope with 999184588Sdfr * increased load, set the state back to SVCPOOL_ACTIVE. 1000184588Sdfr */ 1001184588Sdfr if (pool->sp_state == SVCPOOL_THREADSTARTING) 1002184588Sdfr pool->sp_state = SVCPOOL_ACTIVE; 1003177633Sdfr 1004184588Sdfr while (pool->sp_state != SVCPOOL_CLOSING) { 1005184588Sdfr /* 1006184588Sdfr * Check for idle transports once per second. 1007184588Sdfr */ 1008184588Sdfr if (time_uptime > pool->sp_lastidlecheck) { 1009184588Sdfr pool->sp_lastidlecheck = time_uptime; 1010184588Sdfr svc_checkidle(pool); 1011184588Sdfr } 1012184588Sdfr 1013184588Sdfr xprt = st->st_xprt; 1014184588Sdfr if (!xprt && STAILQ_EMPTY(&st->st_reqs)) { 1015184588Sdfr /* 1016184588Sdfr * Enforce maxthreads count. 1017184588Sdfr */ 1018184588Sdfr if (pool->sp_threadcount > pool->sp_maxthreads) 1019177633Sdfr break; 1020184588Sdfr 1021184588Sdfr /* 1022184588Sdfr * Before sleeping, see if we can find an 1023184588Sdfr * active transport which isn't being serviced 1024184588Sdfr * by a thread. 1025184588Sdfr */ 1026184588Sdfr if (svc_request_space_available(pool)) { 1027184588Sdfr TAILQ_FOREACH(xprt, &pool->sp_active, 1028184588Sdfr xp_alink) { 1029184588Sdfr if (!xprt->xp_thread) { 1030184588Sdfr SVC_ACQUIRE(xprt); 1031184588Sdfr xprt->xp_thread = st; 1032184588Sdfr st->st_xprt = xprt; 1033184588Sdfr break; 1034184588Sdfr } 1035184588Sdfr } 1036184588Sdfr } 1037184588Sdfr if (st->st_xprt) 1038184588Sdfr continue; 1039184588Sdfr 1040184588Sdfr LIST_INSERT_HEAD(&pool->sp_idlethreads, st, st_ilink); 1041184588Sdfr error = cv_timedwait_sig(&st->st_cond, &pool->sp_lock, 1042184588Sdfr 5 * hz); 1043184588Sdfr LIST_REMOVE(st, st_ilink); 1044184588Sdfr 1045184588Sdfr /* 1046184588Sdfr * Reduce worker thread count when idle. 1047184588Sdfr */ 1048184588Sdfr if (error == EWOULDBLOCK) { 1049184588Sdfr if (!ismaster 1050184588Sdfr && (pool->sp_threadcount 1051184588Sdfr > pool->sp_minthreads) 1052184588Sdfr && !st->st_xprt 1053184588Sdfr && STAILQ_EMPTY(&st->st_reqs)) 1054184588Sdfr break; 1055184588Sdfr } 1056184588Sdfr if (error == EWOULDBLOCK) 1057184588Sdfr continue; 1058184588Sdfr if (error) { 1059184588Sdfr if (pool->sp_state != SVCPOOL_CLOSING) { 1060184588Sdfr mtx_unlock(&pool->sp_lock); 1061184588Sdfr svc_exit(pool); 1062184588Sdfr mtx_lock(&pool->sp_lock); 1063184588Sdfr } 1064184588Sdfr break; 1065184588Sdfr } 1066184588Sdfr 1067184588Sdfr if (pool->sp_state == SVCPOOL_THREADWANTED) { 1068184588Sdfr pool->sp_state = SVCPOOL_THREADSTARTING; 1069184588Sdfr pool->sp_lastcreatetime = time_uptime; 1070184588Sdfr mtx_unlock(&pool->sp_lock); 1071184588Sdfr svc_new_thread(pool); 1072184588Sdfr mtx_lock(&pool->sp_lock); 1073184588Sdfr } 1074177633Sdfr continue; 1075177633Sdfr } 1076177633Sdfr 1077184588Sdfr if (xprt) { 1078184588Sdfr /* 1079184588Sdfr * Drain the transport socket and queue up any 1080184588Sdfr * RPCs. 1081184588Sdfr */ 1082184588Sdfr xprt->xp_lastactive = time_uptime; 1083184588Sdfr stat = XPRT_IDLE; 1084184588Sdfr do { 1085184588Sdfr if (!svc_request_space_available(pool)) 1086184588Sdfr break; 1087184588Sdfr rqstp = NULL; 1088184588Sdfr mtx_unlock(&pool->sp_lock); 1089184588Sdfr stat = svc_getreq(xprt, &rqstp); 1090184588Sdfr mtx_lock(&pool->sp_lock); 1091184588Sdfr if (rqstp) { 1092184588Sdfr /* 1093184588Sdfr * See if the application has 1094184588Sdfr * a preference for some other 1095184588Sdfr * thread. 1096184588Sdfr */ 1097184588Sdfr stpref = st; 1098184588Sdfr if (pool->sp_assign) 1099184588Sdfr stpref = pool->sp_assign(st, 1100184588Sdfr rqstp); 1101184588Sdfr 1102184588Sdfr pool->sp_space_used += 1103184588Sdfr rqstp->rq_size; 1104184588Sdfr if (pool->sp_space_used 1105184588Sdfr > pool->sp_space_used_highest) 1106184588Sdfr pool->sp_space_used_highest = 1107184588Sdfr pool->sp_space_used; 1108184588Sdfr rqstp->rq_thread = stpref; 1109184588Sdfr STAILQ_INSERT_TAIL(&stpref->st_reqs, 1110184588Sdfr rqstp, rq_link); 1111184588Sdfr stpref->st_reqcount++; 1112184588Sdfr 1113184588Sdfr /* 1114184588Sdfr * If we assigned the request 1115184588Sdfr * to another thread, make 1116184588Sdfr * sure its awake and continue 1117184588Sdfr * reading from the 1118184588Sdfr * socket. Otherwise, try to 1119184588Sdfr * find some other thread to 1120184588Sdfr * read from the socket and 1121184588Sdfr * execute the request 1122184588Sdfr * immediately. 1123184588Sdfr */ 1124184588Sdfr if (stpref != st) { 1125184588Sdfr cv_signal(&stpref->st_cond); 1126184588Sdfr continue; 1127184588Sdfr } else { 1128184588Sdfr break; 1129184588Sdfr } 1130184588Sdfr } 1131184588Sdfr } while (stat == XPRT_MOREREQS 1132184588Sdfr && pool->sp_state != SVCPOOL_CLOSING); 1133184588Sdfr 1134184588Sdfr /* 1135184588Sdfr * Move this transport to the end of the 1136184588Sdfr * active list to ensure fairness when 1137184588Sdfr * multiple transports are active. If this was 1138184588Sdfr * the last queued request, svc_getreq will 1139184588Sdfr * end up calling xprt_inactive to remove from 1140184588Sdfr * the active list. 1141184588Sdfr */ 1142184588Sdfr xprt->xp_thread = NULL; 1143184588Sdfr st->st_xprt = NULL; 1144184588Sdfr if (xprt->xp_active) { 1145184588Sdfr xprt_assignthread(xprt); 1146184588Sdfr TAILQ_REMOVE(&pool->sp_active, xprt, xp_alink); 1147184588Sdfr TAILQ_INSERT_TAIL(&pool->sp_active, xprt, 1148184588Sdfr xp_alink); 1149184588Sdfr } 1150184588Sdfr mtx_unlock(&pool->sp_lock); 1151184588Sdfr SVC_RELEASE(xprt); 1152184588Sdfr mtx_lock(&pool->sp_lock); 1153184588Sdfr } 1154184588Sdfr 1155177633Sdfr /* 1156184588Sdfr * Execute what we have queued. 1157177633Sdfr */ 1158184588Sdfr while ((rqstp = STAILQ_FIRST(&st->st_reqs)) != NULL) { 1159184588Sdfr size_t sz = rqstp->rq_size; 1160184588Sdfr mtx_unlock(&pool->sp_lock); 1161184588Sdfr svc_executereq(rqstp); 1162184588Sdfr mtx_lock(&pool->sp_lock); 1163184588Sdfr pool->sp_space_used -= sz; 1164184588Sdfr } 1165184588Sdfr } 1166177633Sdfr 1167184588Sdfr if (st->st_xprt) { 1168184588Sdfr xprt = st->st_xprt; 1169184588Sdfr st->st_xprt = NULL; 1170184588Sdfr SVC_RELEASE(xprt); 1171177633Sdfr } 1172177633Sdfr 1173184588Sdfr KASSERT(STAILQ_EMPTY(&st->st_reqs), ("stray reqs on exit")); 1174184588Sdfr LIST_REMOVE(st, st_link); 1175184588Sdfr pool->sp_threadcount--; 1176184588Sdfr 1177177633Sdfr mtx_unlock(&pool->sp_lock); 1178184588Sdfr 1179184588Sdfr cv_destroy(&st->st_cond); 1180184588Sdfr mem_free(st, sizeof(*st)); 1181184588Sdfr 1182184588Sdfr if (!ismaster) 1183184588Sdfr wakeup(pool); 1184177633Sdfr} 1185177633Sdfr 1186184588Sdfrstatic void 1187184588Sdfrsvc_thread_start(void *arg) 1188184588Sdfr{ 1189184588Sdfr 1190184588Sdfr svc_run_internal((SVCPOOL *) arg, FALSE); 1191184588Sdfr kthread_exit(); 1192184588Sdfr} 1193184588Sdfr 1194184588Sdfrstatic void 1195184588Sdfrsvc_new_thread(SVCPOOL *pool) 1196184588Sdfr{ 1197184588Sdfr struct thread *td; 1198184588Sdfr 1199184588Sdfr pool->sp_threadcount++; 1200184588Sdfr kthread_add(svc_thread_start, pool, 1201184588Sdfr pool->sp_proc, &td, 0, 0, 1202184588Sdfr "%s: service", pool->sp_name); 1203184588Sdfr} 1204184588Sdfr 1205177633Sdfrvoid 1206184588Sdfrsvc_run(SVCPOOL *pool) 1207184588Sdfr{ 1208184588Sdfr int i; 1209184588Sdfr struct proc *p; 1210184588Sdfr struct thread *td; 1211184588Sdfr 1212184588Sdfr p = curproc; 1213184588Sdfr td = curthread; 1214184588Sdfr snprintf(td->td_name, sizeof(td->td_name), 1215184588Sdfr "%s: master", pool->sp_name); 1216184588Sdfr pool->sp_state = SVCPOOL_ACTIVE; 1217184588Sdfr pool->sp_proc = p; 1218184588Sdfr pool->sp_lastcreatetime = time_uptime; 1219184588Sdfr pool->sp_threadcount = 1; 1220184588Sdfr 1221184588Sdfr for (i = 1; i < pool->sp_minthreads; i++) { 1222184588Sdfr svc_new_thread(pool); 1223184588Sdfr } 1224184588Sdfr 1225184588Sdfr svc_run_internal(pool, TRUE); 1226184588Sdfr 1227184588Sdfr mtx_lock(&pool->sp_lock); 1228184588Sdfr while (pool->sp_threadcount > 0) 1229184588Sdfr msleep(pool, &pool->sp_lock, 0, "svcexit", 0); 1230184588Sdfr mtx_unlock(&pool->sp_lock); 1231184588Sdfr} 1232184588Sdfr 1233184588Sdfrvoid 1234177633Sdfrsvc_exit(SVCPOOL *pool) 1235177633Sdfr{ 1236184588Sdfr SVCTHREAD *st; 1237184588Sdfr 1238177633Sdfr mtx_lock(&pool->sp_lock); 1239184588Sdfr 1240184588Sdfr pool->sp_state = SVCPOOL_CLOSING; 1241184588Sdfr LIST_FOREACH(st, &pool->sp_idlethreads, st_ilink) 1242184588Sdfr cv_signal(&st->st_cond); 1243184588Sdfr 1244177633Sdfr mtx_unlock(&pool->sp_lock); 1245177633Sdfr} 1246184588Sdfr 1247184588Sdfrbool_t 1248184588Sdfrsvc_getargs(struct svc_req *rqstp, xdrproc_t xargs, void *args) 1249184588Sdfr{ 1250184588Sdfr struct mbuf *m; 1251184588Sdfr XDR xdrs; 1252184588Sdfr bool_t stat; 1253184588Sdfr 1254184588Sdfr m = rqstp->rq_args; 1255184588Sdfr rqstp->rq_args = NULL; 1256184588Sdfr 1257184588Sdfr xdrmbuf_create(&xdrs, m, XDR_DECODE); 1258184588Sdfr stat = xargs(&xdrs, args); 1259184588Sdfr XDR_DESTROY(&xdrs); 1260184588Sdfr 1261184588Sdfr return (stat); 1262184588Sdfr} 1263184588Sdfr 1264184588Sdfrbool_t 1265184588Sdfrsvc_freeargs(struct svc_req *rqstp, xdrproc_t xargs, void *args) 1266184588Sdfr{ 1267184588Sdfr XDR xdrs; 1268184588Sdfr 1269184588Sdfr if (rqstp->rq_addr) { 1270184588Sdfr free(rqstp->rq_addr, M_SONAME); 1271184588Sdfr rqstp->rq_addr = NULL; 1272184588Sdfr } 1273184588Sdfr 1274184588Sdfr xdrs.x_op = XDR_FREE; 1275184588Sdfr return (xargs(&xdrs, args)); 1276184588Sdfr} 1277184588Sdfr 1278184588Sdfrvoid 1279184588Sdfrsvc_freereq(struct svc_req *rqstp) 1280184588Sdfr{ 1281184588Sdfr SVCTHREAD *st; 1282184588Sdfr SVCXPRT *xprt; 1283184588Sdfr SVCPOOL *pool; 1284184588Sdfr 1285184588Sdfr st = rqstp->rq_thread; 1286184588Sdfr xprt = rqstp->rq_xprt; 1287184588Sdfr if (xprt) 1288184588Sdfr pool = xprt->xp_pool; 1289184588Sdfr else 1290184588Sdfr pool = NULL; 1291184588Sdfr if (st) { 1292184588Sdfr mtx_lock(&pool->sp_lock); 1293184588Sdfr KASSERT(rqstp == STAILQ_FIRST(&st->st_reqs), 1294184588Sdfr ("Freeing request out of order")); 1295184588Sdfr STAILQ_REMOVE_HEAD(&st->st_reqs, rq_link); 1296184588Sdfr st->st_reqcount--; 1297184588Sdfr if (pool->sp_done) 1298184588Sdfr pool->sp_done(st, rqstp); 1299184588Sdfr mtx_unlock(&pool->sp_lock); 1300184588Sdfr } 1301184588Sdfr 1302184588Sdfr if (rqstp->rq_auth.svc_ah_ops) 1303184588Sdfr SVCAUTH_RELEASE(&rqstp->rq_auth); 1304184588Sdfr 1305184588Sdfr if (rqstp->rq_xprt) { 1306184588Sdfr SVC_RELEASE(rqstp->rq_xprt); 1307184588Sdfr } 1308184588Sdfr 1309184588Sdfr if (rqstp->rq_addr) 1310184588Sdfr free(rqstp->rq_addr, M_SONAME); 1311184588Sdfr 1312184588Sdfr if (rqstp->rq_args) 1313184588Sdfr m_freem(rqstp->rq_args); 1314184588Sdfr 1315184588Sdfr free(rqstp, M_RPC); 1316184588Sdfr} 1317