svc.c revision 184588
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 184588 2008-11-03 10:38:00Z dfr $"); 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 178177633Sdfr mtx_destroy(&pool->sp_lock); 179184588Sdfr 180184588Sdfr TAILQ_FOREACH_SAFE(xprt, &cleanup, xp_link, nxprt) { 181184588Sdfr SVC_RELEASE(xprt); 182184588Sdfr } 183184588Sdfr 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 356184588Sdfr if (!xprt->xp_registered) { 357184588Sdfr /* 358184588Sdfr * Race with xprt_unregister - we lose. 359184588Sdfr */ 360184588Sdfr return; 361184588Sdfr } 362184588Sdfr 363177633Sdfr mtx_lock(&pool->sp_lock); 364177633Sdfr 365177633Sdfr if (!xprt->xp_active) { 366177633Sdfr TAILQ_INSERT_TAIL(&pool->sp_active, xprt, xp_alink); 367177633Sdfr xprt->xp_active = TRUE; 368184588Sdfr xprt_assignthread(xprt); 369177633Sdfr } 370177633Sdfr 371177633Sdfr mtx_unlock(&pool->sp_lock); 372177633Sdfr} 373177633Sdfr 374177633Sdfrvoid 375184588Sdfrxprt_inactive_locked(SVCXPRT *xprt) 376177633Sdfr{ 377177633Sdfr SVCPOOL *pool = xprt->xp_pool; 378177633Sdfr 379177633Sdfr if (xprt->xp_active) { 380177633Sdfr TAILQ_REMOVE(&pool->sp_active, xprt, xp_alink); 381177633Sdfr xprt->xp_active = FALSE; 382177633Sdfr } 383184588Sdfr} 384177633Sdfr 385184588Sdfrvoid 386184588Sdfrxprt_inactive(SVCXPRT *xprt) 387184588Sdfr{ 388184588Sdfr SVCPOOL *pool = xprt->xp_pool; 389184588Sdfr 390184588Sdfr mtx_lock(&pool->sp_lock); 391184588Sdfr xprt_inactive_locked(xprt); 392177633Sdfr mtx_unlock(&pool->sp_lock); 393177633Sdfr} 394177633Sdfr 395177633Sdfr/* 396177633Sdfr * Add a service program to the callout list. 397177633Sdfr * The dispatch routine will be called when a rpc request for this 398177633Sdfr * program number comes in. 399177633Sdfr */ 400177633Sdfrbool_t 401177633Sdfrsvc_reg(SVCXPRT *xprt, const rpcprog_t prog, const rpcvers_t vers, 402177633Sdfr void (*dispatch)(struct svc_req *, SVCXPRT *), 403177633Sdfr const struct netconfig *nconf) 404177633Sdfr{ 405177633Sdfr SVCPOOL *pool = xprt->xp_pool; 406177633Sdfr struct svc_callout *s; 407177633Sdfr char *netid = NULL; 408177633Sdfr int flag = 0; 409177633Sdfr 410177633Sdfr/* VARIABLES PROTECTED BY svc_lock: s, svc_head */ 411177633Sdfr 412177633Sdfr if (xprt->xp_netid) { 413177633Sdfr netid = strdup(xprt->xp_netid, M_RPC); 414177633Sdfr flag = 1; 415177633Sdfr } else if (nconf && nconf->nc_netid) { 416177633Sdfr netid = strdup(nconf->nc_netid, M_RPC); 417177633Sdfr flag = 1; 418177633Sdfr } /* must have been created with svc_raw_create */ 419177633Sdfr if ((netid == NULL) && (flag == 1)) { 420177633Sdfr return (FALSE); 421177633Sdfr } 422177633Sdfr 423177633Sdfr mtx_lock(&pool->sp_lock); 424177633Sdfr if ((s = svc_find(pool, prog, vers, netid)) != NULL) { 425177633Sdfr if (netid) 426177633Sdfr free(netid, M_RPC); 427177633Sdfr if (s->sc_dispatch == dispatch) 428177633Sdfr goto rpcb_it; /* he is registering another xptr */ 429177633Sdfr mtx_unlock(&pool->sp_lock); 430177633Sdfr return (FALSE); 431177633Sdfr } 432177633Sdfr s = malloc(sizeof (struct svc_callout), M_RPC, M_NOWAIT); 433177633Sdfr if (s == NULL) { 434177633Sdfr if (netid) 435177633Sdfr free(netid, M_RPC); 436177633Sdfr mtx_unlock(&pool->sp_lock); 437177633Sdfr return (FALSE); 438177633Sdfr } 439177633Sdfr 440177633Sdfr s->sc_prog = prog; 441177633Sdfr s->sc_vers = vers; 442177633Sdfr s->sc_dispatch = dispatch; 443177633Sdfr s->sc_netid = netid; 444177633Sdfr TAILQ_INSERT_TAIL(&pool->sp_callouts, s, sc_link); 445177633Sdfr 446177633Sdfr if ((xprt->xp_netid == NULL) && (flag == 1) && netid) 447177633Sdfr ((SVCXPRT *) xprt)->xp_netid = strdup(netid, M_RPC); 448177633Sdfr 449177633Sdfrrpcb_it: 450177633Sdfr mtx_unlock(&pool->sp_lock); 451177633Sdfr /* now register the information with the local binder service */ 452177633Sdfr if (nconf) { 453177633Sdfr bool_t dummy; 454177633Sdfr struct netconfig tnc; 455184588Sdfr struct netbuf nb; 456177633Sdfr tnc = *nconf; 457184588Sdfr nb.buf = &xprt->xp_ltaddr; 458184588Sdfr nb.len = xprt->xp_ltaddr.ss_len; 459184588Sdfr dummy = rpcb_set(prog, vers, &tnc, &nb); 460177633Sdfr return (dummy); 461177633Sdfr } 462177633Sdfr return (TRUE); 463177633Sdfr} 464177633Sdfr 465177633Sdfr/* 466177633Sdfr * Remove a service program from the callout list. 467177633Sdfr */ 468177633Sdfrvoid 469177633Sdfrsvc_unreg(SVCPOOL *pool, const rpcprog_t prog, const rpcvers_t vers) 470177633Sdfr{ 471177633Sdfr struct svc_callout *s; 472177633Sdfr 473177633Sdfr /* unregister the information anyway */ 474177633Sdfr (void) rpcb_unset(prog, vers, NULL); 475177633Sdfr mtx_lock(&pool->sp_lock); 476177633Sdfr while ((s = svc_find(pool, prog, vers, NULL)) != NULL) { 477177633Sdfr TAILQ_REMOVE(&pool->sp_callouts, s, sc_link); 478177633Sdfr if (s->sc_netid) 479177633Sdfr mem_free(s->sc_netid, sizeof (s->sc_netid) + 1); 480177633Sdfr mem_free(s, sizeof (struct svc_callout)); 481177633Sdfr } 482177633Sdfr mtx_unlock(&pool->sp_lock); 483177633Sdfr} 484177633Sdfr 485177633Sdfr/* ********************** CALLOUT list related stuff ************* */ 486177633Sdfr 487177633Sdfr/* 488177633Sdfr * Search the callout list for a program number, return the callout 489177633Sdfr * struct. 490177633Sdfr */ 491177633Sdfrstatic struct svc_callout * 492177633Sdfrsvc_find(SVCPOOL *pool, rpcprog_t prog, rpcvers_t vers, char *netid) 493177633Sdfr{ 494177633Sdfr struct svc_callout *s; 495177633Sdfr 496177633Sdfr mtx_assert(&pool->sp_lock, MA_OWNED); 497177633Sdfr TAILQ_FOREACH(s, &pool->sp_callouts, sc_link) { 498177633Sdfr if (s->sc_prog == prog && s->sc_vers == vers 499177633Sdfr && (netid == NULL || s->sc_netid == NULL || 500177633Sdfr strcmp(netid, s->sc_netid) == 0)) 501177633Sdfr break; 502177633Sdfr } 503177633Sdfr 504177633Sdfr return (s); 505177633Sdfr} 506177633Sdfr 507177633Sdfr/* ******************* REPLY GENERATION ROUTINES ************ */ 508177633Sdfr 509184588Sdfrstatic bool_t 510184588Sdfrsvc_sendreply_common(struct svc_req *rqstp, struct rpc_msg *rply, 511184588Sdfr struct mbuf *body) 512184588Sdfr{ 513184588Sdfr SVCXPRT *xprt = rqstp->rq_xprt; 514184588Sdfr bool_t ok; 515184588Sdfr 516184588Sdfr if (rqstp->rq_args) { 517184588Sdfr m_freem(rqstp->rq_args); 518184588Sdfr rqstp->rq_args = NULL; 519184588Sdfr } 520184588Sdfr 521184588Sdfr if (xprt->xp_pool->sp_rcache) 522184588Sdfr replay_setreply(xprt->xp_pool->sp_rcache, 523184588Sdfr rply, svc_getrpccaller(rqstp), body); 524184588Sdfr 525184588Sdfr if (!SVCAUTH_WRAP(&rqstp->rq_auth, &body)) 526184588Sdfr return (FALSE); 527184588Sdfr 528184588Sdfr ok = SVC_REPLY(xprt, rply, rqstp->rq_addr, body); 529184588Sdfr if (rqstp->rq_addr) { 530184588Sdfr free(rqstp->rq_addr, M_SONAME); 531184588Sdfr rqstp->rq_addr = NULL; 532184588Sdfr } 533184588Sdfr 534184588Sdfr return (ok); 535184588Sdfr} 536184588Sdfr 537177633Sdfr/* 538177633Sdfr * Send a reply to an rpc request 539177633Sdfr */ 540177633Sdfrbool_t 541184588Sdfrsvc_sendreply(struct svc_req *rqstp, xdrproc_t xdr_results, void * xdr_location) 542177633Sdfr{ 543177633Sdfr struct rpc_msg rply; 544184588Sdfr struct mbuf *m; 545184588Sdfr XDR xdrs; 546184588Sdfr bool_t ok; 547177633Sdfr 548184588Sdfr rply.rm_xid = rqstp->rq_xid; 549177633Sdfr rply.rm_direction = REPLY; 550177633Sdfr rply.rm_reply.rp_stat = MSG_ACCEPTED; 551184588Sdfr rply.acpted_rply.ar_verf = rqstp->rq_verf; 552177633Sdfr rply.acpted_rply.ar_stat = SUCCESS; 553184588Sdfr rply.acpted_rply.ar_results.where = NULL; 554184588Sdfr rply.acpted_rply.ar_results.proc = (xdrproc_t) xdr_void; 555177633Sdfr 556184588Sdfr MGET(m, M_WAIT, MT_DATA); 557184588Sdfr MCLGET(m, M_WAIT); 558184588Sdfr m->m_len = 0; 559184588Sdfr xdrmbuf_create(&xdrs, m, XDR_ENCODE); 560184588Sdfr ok = xdr_results(&xdrs, xdr_location); 561184588Sdfr XDR_DESTROY(&xdrs); 562184588Sdfr 563184588Sdfr if (ok) { 564184588Sdfr return (svc_sendreply_common(rqstp, &rply, m)); 565184588Sdfr } else { 566184588Sdfr m_freem(m); 567184588Sdfr return (FALSE); 568184588Sdfr } 569177633Sdfr} 570177633Sdfr 571184588Sdfrbool_t 572184588Sdfrsvc_sendreply_mbuf(struct svc_req *rqstp, struct mbuf *m) 573184588Sdfr{ 574184588Sdfr struct rpc_msg rply; 575184588Sdfr 576184588Sdfr rply.rm_xid = rqstp->rq_xid; 577184588Sdfr rply.rm_direction = REPLY; 578184588Sdfr rply.rm_reply.rp_stat = MSG_ACCEPTED; 579184588Sdfr rply.acpted_rply.ar_verf = rqstp->rq_verf; 580184588Sdfr rply.acpted_rply.ar_stat = SUCCESS; 581184588Sdfr rply.acpted_rply.ar_results.where = NULL; 582184588Sdfr rply.acpted_rply.ar_results.proc = (xdrproc_t) xdr_void; 583184588Sdfr 584184588Sdfr return (svc_sendreply_common(rqstp, &rply, m)); 585184588Sdfr} 586184588Sdfr 587177633Sdfr/* 588177633Sdfr * No procedure error reply 589177633Sdfr */ 590177633Sdfrvoid 591184588Sdfrsvcerr_noproc(struct svc_req *rqstp) 592177633Sdfr{ 593184588Sdfr SVCXPRT *xprt = rqstp->rq_xprt; 594177633Sdfr struct rpc_msg rply; 595177633Sdfr 596184588Sdfr rply.rm_xid = rqstp->rq_xid; 597177633Sdfr rply.rm_direction = REPLY; 598177633Sdfr rply.rm_reply.rp_stat = MSG_ACCEPTED; 599184588Sdfr rply.acpted_rply.ar_verf = rqstp->rq_verf; 600177633Sdfr rply.acpted_rply.ar_stat = PROC_UNAVAIL; 601177633Sdfr 602184588Sdfr if (xprt->xp_pool->sp_rcache) 603184588Sdfr replay_setreply(xprt->xp_pool->sp_rcache, 604184588Sdfr &rply, svc_getrpccaller(rqstp), NULL); 605184588Sdfr 606184588Sdfr svc_sendreply_common(rqstp, &rply, NULL); 607177633Sdfr} 608177633Sdfr 609177633Sdfr/* 610177633Sdfr * Can't decode args error reply 611177633Sdfr */ 612177633Sdfrvoid 613184588Sdfrsvcerr_decode(struct svc_req *rqstp) 614177633Sdfr{ 615184588Sdfr SVCXPRT *xprt = rqstp->rq_xprt; 616177633Sdfr struct rpc_msg rply; 617177633Sdfr 618184588Sdfr rply.rm_xid = rqstp->rq_xid; 619177633Sdfr rply.rm_direction = REPLY; 620177633Sdfr rply.rm_reply.rp_stat = MSG_ACCEPTED; 621184588Sdfr rply.acpted_rply.ar_verf = rqstp->rq_verf; 622177633Sdfr rply.acpted_rply.ar_stat = GARBAGE_ARGS; 623177633Sdfr 624184588Sdfr if (xprt->xp_pool->sp_rcache) 625184588Sdfr replay_setreply(xprt->xp_pool->sp_rcache, 626184588Sdfr &rply, (struct sockaddr *) &xprt->xp_rtaddr, NULL); 627184588Sdfr 628184588Sdfr svc_sendreply_common(rqstp, &rply, NULL); 629177633Sdfr} 630177633Sdfr 631177633Sdfr/* 632177633Sdfr * Some system error 633177633Sdfr */ 634177633Sdfrvoid 635184588Sdfrsvcerr_systemerr(struct svc_req *rqstp) 636177633Sdfr{ 637184588Sdfr SVCXPRT *xprt = rqstp->rq_xprt; 638177633Sdfr struct rpc_msg rply; 639177633Sdfr 640184588Sdfr rply.rm_xid = rqstp->rq_xid; 641177633Sdfr rply.rm_direction = REPLY; 642177633Sdfr rply.rm_reply.rp_stat = MSG_ACCEPTED; 643184588Sdfr rply.acpted_rply.ar_verf = rqstp->rq_verf; 644177633Sdfr rply.acpted_rply.ar_stat = SYSTEM_ERR; 645177633Sdfr 646184588Sdfr if (xprt->xp_pool->sp_rcache) 647184588Sdfr replay_setreply(xprt->xp_pool->sp_rcache, 648184588Sdfr &rply, svc_getrpccaller(rqstp), NULL); 649184588Sdfr 650184588Sdfr svc_sendreply_common(rqstp, &rply, NULL); 651177633Sdfr} 652177633Sdfr 653177633Sdfr/* 654177633Sdfr * Authentication error reply 655177633Sdfr */ 656177633Sdfrvoid 657184588Sdfrsvcerr_auth(struct svc_req *rqstp, enum auth_stat why) 658177633Sdfr{ 659184588Sdfr SVCXPRT *xprt = rqstp->rq_xprt; 660177633Sdfr struct rpc_msg rply; 661177633Sdfr 662184588Sdfr rply.rm_xid = rqstp->rq_xid; 663177633Sdfr rply.rm_direction = REPLY; 664177633Sdfr rply.rm_reply.rp_stat = MSG_DENIED; 665177633Sdfr rply.rjcted_rply.rj_stat = AUTH_ERROR; 666177633Sdfr rply.rjcted_rply.rj_why = why; 667177633Sdfr 668184588Sdfr if (xprt->xp_pool->sp_rcache) 669184588Sdfr replay_setreply(xprt->xp_pool->sp_rcache, 670184588Sdfr &rply, svc_getrpccaller(rqstp), NULL); 671184588Sdfr 672184588Sdfr svc_sendreply_common(rqstp, &rply, NULL); 673177633Sdfr} 674177633Sdfr 675177633Sdfr/* 676177633Sdfr * Auth too weak error reply 677177633Sdfr */ 678177633Sdfrvoid 679184588Sdfrsvcerr_weakauth(struct svc_req *rqstp) 680177633Sdfr{ 681177633Sdfr 682184588Sdfr svcerr_auth(rqstp, AUTH_TOOWEAK); 683177633Sdfr} 684177633Sdfr 685177633Sdfr/* 686177633Sdfr * Program unavailable error reply 687177633Sdfr */ 688177633Sdfrvoid 689184588Sdfrsvcerr_noprog(struct svc_req *rqstp) 690177633Sdfr{ 691184588Sdfr SVCXPRT *xprt = rqstp->rq_xprt; 692177633Sdfr struct rpc_msg rply; 693177633Sdfr 694184588Sdfr rply.rm_xid = rqstp->rq_xid; 695177633Sdfr rply.rm_direction = REPLY; 696177633Sdfr rply.rm_reply.rp_stat = MSG_ACCEPTED; 697184588Sdfr rply.acpted_rply.ar_verf = rqstp->rq_verf; 698177633Sdfr rply.acpted_rply.ar_stat = PROG_UNAVAIL; 699177633Sdfr 700184588Sdfr if (xprt->xp_pool->sp_rcache) 701184588Sdfr replay_setreply(xprt->xp_pool->sp_rcache, 702184588Sdfr &rply, svc_getrpccaller(rqstp), NULL); 703184588Sdfr 704184588Sdfr svc_sendreply_common(rqstp, &rply, NULL); 705177633Sdfr} 706177633Sdfr 707177633Sdfr/* 708177633Sdfr * Program version mismatch error reply 709177633Sdfr */ 710177633Sdfrvoid 711184588Sdfrsvcerr_progvers(struct svc_req *rqstp, rpcvers_t low_vers, rpcvers_t high_vers) 712177633Sdfr{ 713184588Sdfr SVCXPRT *xprt = rqstp->rq_xprt; 714177633Sdfr struct rpc_msg rply; 715177633Sdfr 716184588Sdfr rply.rm_xid = rqstp->rq_xid; 717177633Sdfr rply.rm_direction = REPLY; 718177633Sdfr rply.rm_reply.rp_stat = MSG_ACCEPTED; 719184588Sdfr rply.acpted_rply.ar_verf = rqstp->rq_verf; 720177633Sdfr rply.acpted_rply.ar_stat = PROG_MISMATCH; 721177633Sdfr rply.acpted_rply.ar_vers.low = (uint32_t)low_vers; 722177633Sdfr rply.acpted_rply.ar_vers.high = (uint32_t)high_vers; 723177633Sdfr 724184588Sdfr if (xprt->xp_pool->sp_rcache) 725184588Sdfr replay_setreply(xprt->xp_pool->sp_rcache, 726184588Sdfr &rply, svc_getrpccaller(rqstp), NULL); 727184588Sdfr 728184588Sdfr svc_sendreply_common(rqstp, &rply, NULL); 729177633Sdfr} 730177633Sdfr 731184588Sdfr/* 732184588Sdfr * Allocate a new server transport structure. All fields are 733184588Sdfr * initialized to zero and xp_p3 is initialized to point at an 734184588Sdfr * extension structure to hold various flags and authentication 735184588Sdfr * parameters. 736184588Sdfr */ 737184588SdfrSVCXPRT * 738184588Sdfrsvc_xprt_alloc() 739184588Sdfr{ 740184588Sdfr SVCXPRT *xprt; 741184588Sdfr SVCXPRT_EXT *ext; 742184588Sdfr 743184588Sdfr xprt = mem_alloc(sizeof(SVCXPRT)); 744184588Sdfr memset(xprt, 0, sizeof(SVCXPRT)); 745184588Sdfr ext = mem_alloc(sizeof(SVCXPRT_EXT)); 746184588Sdfr memset(ext, 0, sizeof(SVCXPRT_EXT)); 747184588Sdfr xprt->xp_p3 = ext; 748184588Sdfr refcount_init(&xprt->xp_refs, 1); 749184588Sdfr 750184588Sdfr return (xprt); 751184588Sdfr} 752184588Sdfr 753184588Sdfr/* 754184588Sdfr * Free a server transport structure. 755184588Sdfr */ 756184588Sdfrvoid 757184588Sdfrsvc_xprt_free(xprt) 758184588Sdfr SVCXPRT *xprt; 759184588Sdfr{ 760184588Sdfr 761184588Sdfr mem_free(xprt->xp_p3, sizeof(SVCXPRT_EXT)); 762184588Sdfr mem_free(xprt, sizeof(SVCXPRT)); 763184588Sdfr} 764184588Sdfr 765177633Sdfr/* ******************* SERVER INPUT STUFF ******************* */ 766177633Sdfr 767177633Sdfr/* 768184588Sdfr * Read RPC requests from a transport and queue them to be 769184588Sdfr * executed. We handle authentication and replay cache replies here. 770184588Sdfr * Actually dispatching the RPC is deferred till svc_executereq. 771177633Sdfr */ 772184588Sdfrstatic enum xprt_stat 773184588Sdfrsvc_getreq(SVCXPRT *xprt, struct svc_req **rqstp_ret) 774177633Sdfr{ 775177633Sdfr SVCPOOL *pool = xprt->xp_pool; 776184588Sdfr struct svc_req *r; 777177633Sdfr struct rpc_msg msg; 778184588Sdfr struct mbuf *args; 779177633Sdfr enum xprt_stat stat; 780177633Sdfr 781177633Sdfr /* now receive msgs from xprtprt (support batch calls) */ 782184588Sdfr r = malloc(sizeof(*r), M_RPC, M_WAITOK|M_ZERO); 783177633Sdfr 784184588Sdfr msg.rm_call.cb_cred.oa_base = r->rq_credarea; 785184588Sdfr msg.rm_call.cb_verf.oa_base = &r->rq_credarea[MAX_AUTH_BYTES]; 786184588Sdfr r->rq_clntcred = &r->rq_credarea[2*MAX_AUTH_BYTES]; 787184588Sdfr if (SVC_RECV(xprt, &msg, &r->rq_addr, &args)) { 788184588Sdfr enum auth_stat why; 789177633Sdfr 790184588Sdfr /* 791184588Sdfr * Handle replays and authenticate before queuing the 792184588Sdfr * request to be executed. 793184588Sdfr */ 794184588Sdfr SVC_ACQUIRE(xprt); 795184588Sdfr r->rq_xprt = xprt; 796184588Sdfr if (pool->sp_rcache) { 797184588Sdfr struct rpc_msg repmsg; 798184588Sdfr struct mbuf *repbody; 799184588Sdfr enum replay_state rs; 800184588Sdfr rs = replay_find(pool->sp_rcache, &msg, 801184588Sdfr svc_getrpccaller(r), &repmsg, &repbody); 802184588Sdfr switch (rs) { 803184588Sdfr case RS_NEW: 804184588Sdfr break; 805184588Sdfr case RS_DONE: 806184588Sdfr SVC_REPLY(xprt, &repmsg, r->rq_addr, 807184588Sdfr repbody); 808184588Sdfr if (r->rq_addr) { 809184588Sdfr free(r->rq_addr, M_SONAME); 810184588Sdfr r->rq_addr = NULL; 811184588Sdfr } 812177633Sdfr goto call_done; 813184588Sdfr 814184588Sdfr default: 815184588Sdfr goto call_done; 816177633Sdfr } 817184588Sdfr } 818184588Sdfr 819184588Sdfr r->rq_xid = msg.rm_xid; 820184588Sdfr r->rq_prog = msg.rm_call.cb_prog; 821184588Sdfr r->rq_vers = msg.rm_call.cb_vers; 822184588Sdfr r->rq_proc = msg.rm_call.cb_proc; 823184588Sdfr r->rq_size = sizeof(*r) + m_length(args, NULL); 824184588Sdfr r->rq_args = args; 825184588Sdfr if ((why = _authenticate(r, &msg)) != AUTH_OK) { 826177633Sdfr /* 827184588Sdfr * RPCSEC_GSS uses this return code 828184588Sdfr * for requests that form part of its 829184588Sdfr * context establishment protocol and 830184588Sdfr * should not be dispatched to the 831184588Sdfr * application. 832177633Sdfr */ 833184588Sdfr if (why != RPCSEC_GSS_NODISPATCH) 834184588Sdfr svcerr_auth(r, why); 835184588Sdfr goto call_done; 836177633Sdfr } 837184588Sdfr 838184588Sdfr if (!SVCAUTH_UNWRAP(&r->rq_auth, &r->rq_args)) { 839184588Sdfr svcerr_decode(r); 840184588Sdfr goto call_done; 841184588Sdfr } 842184588Sdfr 843177633Sdfr /* 844184588Sdfr * Everything checks out, return request to caller. 845177633Sdfr */ 846184588Sdfr *rqstp_ret = r; 847184588Sdfr r = NULL; 848184588Sdfr } 849177633Sdfrcall_done: 850184588Sdfr if (r) { 851184588Sdfr svc_freereq(r); 852184588Sdfr r = NULL; 853184588Sdfr } 854184588Sdfr if ((stat = SVC_STAT(xprt)) == XPRT_DIED) { 855184588Sdfr xprt_unregister(xprt); 856184588Sdfr } 857184588Sdfr 858184588Sdfr return (stat); 859184588Sdfr} 860184588Sdfr 861184588Sdfrstatic void 862184588Sdfrsvc_executereq(struct svc_req *rqstp) 863184588Sdfr{ 864184588Sdfr SVCXPRT *xprt = rqstp->rq_xprt; 865184588Sdfr SVCPOOL *pool = xprt->xp_pool; 866184588Sdfr int prog_found; 867184588Sdfr rpcvers_t low_vers; 868184588Sdfr rpcvers_t high_vers; 869184588Sdfr struct svc_callout *s; 870184588Sdfr 871184588Sdfr /* now match message with a registered service*/ 872184588Sdfr prog_found = FALSE; 873184588Sdfr low_vers = (rpcvers_t) -1L; 874184588Sdfr high_vers = (rpcvers_t) 0L; 875184588Sdfr TAILQ_FOREACH(s, &pool->sp_callouts, sc_link) { 876184588Sdfr if (s->sc_prog == rqstp->rq_prog) { 877184588Sdfr if (s->sc_vers == rqstp->rq_vers) { 878184588Sdfr /* 879184588Sdfr * We hand ownership of r to the 880184588Sdfr * dispatch method - they must call 881184588Sdfr * svc_freereq. 882184588Sdfr */ 883184588Sdfr (*s->sc_dispatch)(rqstp, xprt); 884184588Sdfr return; 885184588Sdfr } /* found correct version */ 886184588Sdfr prog_found = TRUE; 887184588Sdfr if (s->sc_vers < low_vers) 888184588Sdfr low_vers = s->sc_vers; 889184588Sdfr if (s->sc_vers > high_vers) 890184588Sdfr high_vers = s->sc_vers; 891184588Sdfr } /* found correct program */ 892184588Sdfr } 893184588Sdfr 894184588Sdfr /* 895184588Sdfr * if we got here, the program or version 896184588Sdfr * is not served ... 897184588Sdfr */ 898184588Sdfr if (prog_found) 899184588Sdfr svcerr_progvers(rqstp, low_vers, high_vers); 900184588Sdfr else 901184588Sdfr svcerr_noprog(rqstp); 902184588Sdfr 903184588Sdfr svc_freereq(rqstp); 904184588Sdfr} 905184588Sdfr 906184588Sdfrstatic void 907184588Sdfrsvc_checkidle(SVCPOOL *pool) 908184588Sdfr{ 909184588Sdfr SVCXPRT *xprt, *nxprt; 910184588Sdfr time_t timo; 911184588Sdfr struct svcxprt_list cleanup; 912184588Sdfr 913184588Sdfr TAILQ_INIT(&cleanup); 914184588Sdfr TAILQ_FOREACH_SAFE(xprt, &pool->sp_xlist, xp_link, nxprt) { 915184588Sdfr /* 916184588Sdfr * Only some transports have idle timers. Don't time 917184588Sdfr * something out which is just waking up. 918184588Sdfr */ 919184588Sdfr if (!xprt->xp_idletimeout || xprt->xp_thread) 920184588Sdfr continue; 921184588Sdfr 922184588Sdfr timo = xprt->xp_lastactive + xprt->xp_idletimeout; 923184588Sdfr if (time_uptime > timo) { 924184588Sdfr xprt_unregister_locked(xprt); 925184588Sdfr TAILQ_INSERT_TAIL(&cleanup, xprt, xp_link); 926177633Sdfr } 927184588Sdfr } 928184588Sdfr 929184588Sdfr mtx_unlock(&pool->sp_lock); 930184588Sdfr TAILQ_FOREACH_SAFE(xprt, &cleanup, xp_link, nxprt) { 931184588Sdfr SVC_RELEASE(xprt); 932184588Sdfr } 933184588Sdfr mtx_lock(&pool->sp_lock); 934184588Sdfr 935177633Sdfr} 936177633Sdfr 937184588Sdfrstatic void 938184588Sdfrsvc_assign_waiting_sockets(SVCPOOL *pool) 939177633Sdfr{ 940177633Sdfr SVCXPRT *xprt; 941184588Sdfr 942184588Sdfr TAILQ_FOREACH(xprt, &pool->sp_active, xp_alink) { 943184588Sdfr if (!xprt->xp_thread) { 944184588Sdfr xprt_assignthread(xprt); 945184588Sdfr } 946184588Sdfr } 947184588Sdfr} 948184588Sdfr 949184588Sdfrstatic bool_t 950184588Sdfrsvc_request_space_available(SVCPOOL *pool) 951184588Sdfr{ 952184588Sdfr 953184588Sdfr mtx_assert(&pool->sp_lock, MA_OWNED); 954184588Sdfr 955184588Sdfr if (pool->sp_space_throttled) { 956184588Sdfr /* 957184588Sdfr * Below the low-water yet? If so, assign any waiting sockets. 958184588Sdfr */ 959184588Sdfr if (pool->sp_space_used < pool->sp_space_low) { 960184588Sdfr pool->sp_space_throttled = FALSE; 961184588Sdfr svc_assign_waiting_sockets(pool); 962184588Sdfr return TRUE; 963184588Sdfr } 964184588Sdfr 965184588Sdfr return FALSE; 966184588Sdfr } else { 967184588Sdfr if (pool->sp_space_used 968184588Sdfr >= pool->sp_space_high) { 969184588Sdfr pool->sp_space_throttled = TRUE; 970184588Sdfr pool->sp_space_throttle_count++; 971184588Sdfr return FALSE; 972184588Sdfr } 973184588Sdfr 974184588Sdfr return TRUE; 975184588Sdfr } 976184588Sdfr} 977184588Sdfr 978184588Sdfrstatic void 979184588Sdfrsvc_run_internal(SVCPOOL *pool, bool_t ismaster) 980184588Sdfr{ 981184588Sdfr SVCTHREAD *st, *stpref; 982184588Sdfr SVCXPRT *xprt; 983184588Sdfr enum xprt_stat stat; 984184588Sdfr struct svc_req *rqstp; 985177633Sdfr int error; 986177633Sdfr 987184588Sdfr st = mem_alloc(sizeof(*st)); 988184588Sdfr st->st_xprt = NULL; 989184588Sdfr STAILQ_INIT(&st->st_reqs); 990184588Sdfr cv_init(&st->st_cond, "rpcsvc"); 991184588Sdfr 992177633Sdfr mtx_lock(&pool->sp_lock); 993184588Sdfr LIST_INSERT_HEAD(&pool->sp_threads, st, st_link); 994177633Sdfr 995184588Sdfr /* 996184588Sdfr * If we are a new thread which was spawned to cope with 997184588Sdfr * increased load, set the state back to SVCPOOL_ACTIVE. 998184588Sdfr */ 999184588Sdfr if (pool->sp_state == SVCPOOL_THREADSTARTING) 1000184588Sdfr pool->sp_state = SVCPOOL_ACTIVE; 1001177633Sdfr 1002184588Sdfr while (pool->sp_state != SVCPOOL_CLOSING) { 1003184588Sdfr /* 1004184588Sdfr * Check for idle transports once per second. 1005184588Sdfr */ 1006184588Sdfr if (time_uptime > pool->sp_lastidlecheck) { 1007184588Sdfr pool->sp_lastidlecheck = time_uptime; 1008184588Sdfr svc_checkidle(pool); 1009184588Sdfr } 1010184588Sdfr 1011184588Sdfr xprt = st->st_xprt; 1012184588Sdfr if (!xprt && STAILQ_EMPTY(&st->st_reqs)) { 1013184588Sdfr /* 1014184588Sdfr * Enforce maxthreads count. 1015184588Sdfr */ 1016184588Sdfr if (pool->sp_threadcount > pool->sp_maxthreads) 1017177633Sdfr break; 1018184588Sdfr 1019184588Sdfr /* 1020184588Sdfr * Before sleeping, see if we can find an 1021184588Sdfr * active transport which isn't being serviced 1022184588Sdfr * by a thread. 1023184588Sdfr */ 1024184588Sdfr if (svc_request_space_available(pool)) { 1025184588Sdfr TAILQ_FOREACH(xprt, &pool->sp_active, 1026184588Sdfr xp_alink) { 1027184588Sdfr if (!xprt->xp_thread) { 1028184588Sdfr SVC_ACQUIRE(xprt); 1029184588Sdfr xprt->xp_thread = st; 1030184588Sdfr st->st_xprt = xprt; 1031184588Sdfr break; 1032184588Sdfr } 1033184588Sdfr } 1034184588Sdfr } 1035184588Sdfr if (st->st_xprt) 1036184588Sdfr continue; 1037184588Sdfr 1038184588Sdfr LIST_INSERT_HEAD(&pool->sp_idlethreads, st, st_ilink); 1039184588Sdfr error = cv_timedwait_sig(&st->st_cond, &pool->sp_lock, 1040184588Sdfr 5 * hz); 1041184588Sdfr LIST_REMOVE(st, st_ilink); 1042184588Sdfr 1043184588Sdfr /* 1044184588Sdfr * Reduce worker thread count when idle. 1045184588Sdfr */ 1046184588Sdfr if (error == EWOULDBLOCK) { 1047184588Sdfr if (!ismaster 1048184588Sdfr && (pool->sp_threadcount 1049184588Sdfr > pool->sp_minthreads) 1050184588Sdfr && !st->st_xprt 1051184588Sdfr && STAILQ_EMPTY(&st->st_reqs)) 1052184588Sdfr break; 1053184588Sdfr } 1054184588Sdfr if (error == EWOULDBLOCK) 1055184588Sdfr continue; 1056184588Sdfr if (error) { 1057184588Sdfr if (pool->sp_state != SVCPOOL_CLOSING) { 1058184588Sdfr mtx_unlock(&pool->sp_lock); 1059184588Sdfr svc_exit(pool); 1060184588Sdfr mtx_lock(&pool->sp_lock); 1061184588Sdfr } 1062184588Sdfr break; 1063184588Sdfr } 1064184588Sdfr 1065184588Sdfr if (pool->sp_state == SVCPOOL_THREADWANTED) { 1066184588Sdfr pool->sp_state = SVCPOOL_THREADSTARTING; 1067184588Sdfr pool->sp_lastcreatetime = time_uptime; 1068184588Sdfr mtx_unlock(&pool->sp_lock); 1069184588Sdfr svc_new_thread(pool); 1070184588Sdfr mtx_lock(&pool->sp_lock); 1071184588Sdfr } 1072177633Sdfr continue; 1073177633Sdfr } 1074177633Sdfr 1075184588Sdfr if (xprt) { 1076184588Sdfr /* 1077184588Sdfr * Drain the transport socket and queue up any 1078184588Sdfr * RPCs. 1079184588Sdfr */ 1080184588Sdfr xprt->xp_lastactive = time_uptime; 1081184588Sdfr stat = XPRT_IDLE; 1082184588Sdfr do { 1083184588Sdfr if (!svc_request_space_available(pool)) 1084184588Sdfr break; 1085184588Sdfr rqstp = NULL; 1086184588Sdfr mtx_unlock(&pool->sp_lock); 1087184588Sdfr stat = svc_getreq(xprt, &rqstp); 1088184588Sdfr mtx_lock(&pool->sp_lock); 1089184588Sdfr if (rqstp) { 1090184588Sdfr /* 1091184588Sdfr * See if the application has 1092184588Sdfr * a preference for some other 1093184588Sdfr * thread. 1094184588Sdfr */ 1095184588Sdfr stpref = st; 1096184588Sdfr if (pool->sp_assign) 1097184588Sdfr stpref = pool->sp_assign(st, 1098184588Sdfr rqstp); 1099184588Sdfr 1100184588Sdfr pool->sp_space_used += 1101184588Sdfr rqstp->rq_size; 1102184588Sdfr if (pool->sp_space_used 1103184588Sdfr > pool->sp_space_used_highest) 1104184588Sdfr pool->sp_space_used_highest = 1105184588Sdfr pool->sp_space_used; 1106184588Sdfr rqstp->rq_thread = stpref; 1107184588Sdfr STAILQ_INSERT_TAIL(&stpref->st_reqs, 1108184588Sdfr rqstp, rq_link); 1109184588Sdfr stpref->st_reqcount++; 1110184588Sdfr 1111184588Sdfr /* 1112184588Sdfr * If we assigned the request 1113184588Sdfr * to another thread, make 1114184588Sdfr * sure its awake and continue 1115184588Sdfr * reading from the 1116184588Sdfr * socket. Otherwise, try to 1117184588Sdfr * find some other thread to 1118184588Sdfr * read from the socket and 1119184588Sdfr * execute the request 1120184588Sdfr * immediately. 1121184588Sdfr */ 1122184588Sdfr if (stpref != st) { 1123184588Sdfr cv_signal(&stpref->st_cond); 1124184588Sdfr continue; 1125184588Sdfr } else { 1126184588Sdfr break; 1127184588Sdfr } 1128184588Sdfr } 1129184588Sdfr } while (stat == XPRT_MOREREQS 1130184588Sdfr && pool->sp_state != SVCPOOL_CLOSING); 1131184588Sdfr 1132184588Sdfr /* 1133184588Sdfr * Move this transport to the end of the 1134184588Sdfr * active list to ensure fairness when 1135184588Sdfr * multiple transports are active. If this was 1136184588Sdfr * the last queued request, svc_getreq will 1137184588Sdfr * end up calling xprt_inactive to remove from 1138184588Sdfr * the active list. 1139184588Sdfr */ 1140184588Sdfr xprt->xp_thread = NULL; 1141184588Sdfr st->st_xprt = NULL; 1142184588Sdfr if (xprt->xp_active) { 1143184588Sdfr xprt_assignthread(xprt); 1144184588Sdfr TAILQ_REMOVE(&pool->sp_active, xprt, xp_alink); 1145184588Sdfr TAILQ_INSERT_TAIL(&pool->sp_active, xprt, 1146184588Sdfr xp_alink); 1147184588Sdfr } 1148184588Sdfr mtx_unlock(&pool->sp_lock); 1149184588Sdfr SVC_RELEASE(xprt); 1150184588Sdfr mtx_lock(&pool->sp_lock); 1151184588Sdfr } 1152184588Sdfr 1153177633Sdfr /* 1154184588Sdfr * Execute what we have queued. 1155177633Sdfr */ 1156184588Sdfr while ((rqstp = STAILQ_FIRST(&st->st_reqs)) != NULL) { 1157184588Sdfr size_t sz = rqstp->rq_size; 1158184588Sdfr mtx_unlock(&pool->sp_lock); 1159184588Sdfr svc_executereq(rqstp); 1160184588Sdfr mtx_lock(&pool->sp_lock); 1161184588Sdfr pool->sp_space_used -= sz; 1162184588Sdfr } 1163184588Sdfr } 1164177633Sdfr 1165184588Sdfr if (st->st_xprt) { 1166184588Sdfr xprt = st->st_xprt; 1167184588Sdfr st->st_xprt = NULL; 1168184588Sdfr SVC_RELEASE(xprt); 1169177633Sdfr } 1170177633Sdfr 1171184588Sdfr KASSERT(STAILQ_EMPTY(&st->st_reqs), ("stray reqs on exit")); 1172184588Sdfr LIST_REMOVE(st, st_link); 1173184588Sdfr pool->sp_threadcount--; 1174184588Sdfr 1175177633Sdfr mtx_unlock(&pool->sp_lock); 1176184588Sdfr 1177184588Sdfr cv_destroy(&st->st_cond); 1178184588Sdfr mem_free(st, sizeof(*st)); 1179184588Sdfr 1180184588Sdfr if (!ismaster) 1181184588Sdfr wakeup(pool); 1182177633Sdfr} 1183177633Sdfr 1184184588Sdfrstatic void 1185184588Sdfrsvc_thread_start(void *arg) 1186184588Sdfr{ 1187184588Sdfr 1188184588Sdfr svc_run_internal((SVCPOOL *) arg, FALSE); 1189184588Sdfr kthread_exit(); 1190184588Sdfr} 1191184588Sdfr 1192184588Sdfrstatic void 1193184588Sdfrsvc_new_thread(SVCPOOL *pool) 1194184588Sdfr{ 1195184588Sdfr struct thread *td; 1196184588Sdfr 1197184588Sdfr pool->sp_threadcount++; 1198184588Sdfr kthread_add(svc_thread_start, pool, 1199184588Sdfr pool->sp_proc, &td, 0, 0, 1200184588Sdfr "%s: service", pool->sp_name); 1201184588Sdfr} 1202184588Sdfr 1203177633Sdfrvoid 1204184588Sdfrsvc_run(SVCPOOL *pool) 1205184588Sdfr{ 1206184588Sdfr int i; 1207184588Sdfr struct proc *p; 1208184588Sdfr struct thread *td; 1209184588Sdfr 1210184588Sdfr p = curproc; 1211184588Sdfr td = curthread; 1212184588Sdfr snprintf(td->td_name, sizeof(td->td_name), 1213184588Sdfr "%s: master", pool->sp_name); 1214184588Sdfr pool->sp_state = SVCPOOL_ACTIVE; 1215184588Sdfr pool->sp_proc = p; 1216184588Sdfr pool->sp_lastcreatetime = time_uptime; 1217184588Sdfr pool->sp_threadcount = 1; 1218184588Sdfr 1219184588Sdfr for (i = 1; i < pool->sp_minthreads; i++) { 1220184588Sdfr svc_new_thread(pool); 1221184588Sdfr } 1222184588Sdfr 1223184588Sdfr svc_run_internal(pool, TRUE); 1224184588Sdfr 1225184588Sdfr mtx_lock(&pool->sp_lock); 1226184588Sdfr while (pool->sp_threadcount > 0) 1227184588Sdfr msleep(pool, &pool->sp_lock, 0, "svcexit", 0); 1228184588Sdfr mtx_unlock(&pool->sp_lock); 1229184588Sdfr} 1230184588Sdfr 1231184588Sdfrvoid 1232177633Sdfrsvc_exit(SVCPOOL *pool) 1233177633Sdfr{ 1234184588Sdfr SVCTHREAD *st; 1235184588Sdfr 1236177633Sdfr mtx_lock(&pool->sp_lock); 1237184588Sdfr 1238184588Sdfr pool->sp_state = SVCPOOL_CLOSING; 1239184588Sdfr LIST_FOREACH(st, &pool->sp_idlethreads, st_ilink) 1240184588Sdfr cv_signal(&st->st_cond); 1241184588Sdfr 1242177633Sdfr mtx_unlock(&pool->sp_lock); 1243177633Sdfr} 1244184588Sdfr 1245184588Sdfrbool_t 1246184588Sdfrsvc_getargs(struct svc_req *rqstp, xdrproc_t xargs, void *args) 1247184588Sdfr{ 1248184588Sdfr struct mbuf *m; 1249184588Sdfr XDR xdrs; 1250184588Sdfr bool_t stat; 1251184588Sdfr 1252184588Sdfr m = rqstp->rq_args; 1253184588Sdfr rqstp->rq_args = NULL; 1254184588Sdfr 1255184588Sdfr xdrmbuf_create(&xdrs, m, XDR_DECODE); 1256184588Sdfr stat = xargs(&xdrs, args); 1257184588Sdfr XDR_DESTROY(&xdrs); 1258184588Sdfr 1259184588Sdfr return (stat); 1260184588Sdfr} 1261184588Sdfr 1262184588Sdfrbool_t 1263184588Sdfrsvc_freeargs(struct svc_req *rqstp, xdrproc_t xargs, void *args) 1264184588Sdfr{ 1265184588Sdfr XDR xdrs; 1266184588Sdfr 1267184588Sdfr if (rqstp->rq_addr) { 1268184588Sdfr free(rqstp->rq_addr, M_SONAME); 1269184588Sdfr rqstp->rq_addr = NULL; 1270184588Sdfr } 1271184588Sdfr 1272184588Sdfr xdrs.x_op = XDR_FREE; 1273184588Sdfr return (xargs(&xdrs, args)); 1274184588Sdfr} 1275184588Sdfr 1276184588Sdfrvoid 1277184588Sdfrsvc_freereq(struct svc_req *rqstp) 1278184588Sdfr{ 1279184588Sdfr SVCTHREAD *st; 1280184588Sdfr SVCXPRT *xprt; 1281184588Sdfr SVCPOOL *pool; 1282184588Sdfr 1283184588Sdfr st = rqstp->rq_thread; 1284184588Sdfr xprt = rqstp->rq_xprt; 1285184588Sdfr if (xprt) 1286184588Sdfr pool = xprt->xp_pool; 1287184588Sdfr else 1288184588Sdfr pool = NULL; 1289184588Sdfr if (st) { 1290184588Sdfr mtx_lock(&pool->sp_lock); 1291184588Sdfr KASSERT(rqstp == STAILQ_FIRST(&st->st_reqs), 1292184588Sdfr ("Freeing request out of order")); 1293184588Sdfr STAILQ_REMOVE_HEAD(&st->st_reqs, rq_link); 1294184588Sdfr st->st_reqcount--; 1295184588Sdfr if (pool->sp_done) 1296184588Sdfr pool->sp_done(st, rqstp); 1297184588Sdfr mtx_unlock(&pool->sp_lock); 1298184588Sdfr } 1299184588Sdfr 1300184588Sdfr if (rqstp->rq_auth.svc_ah_ops) 1301184588Sdfr SVCAUTH_RELEASE(&rqstp->rq_auth); 1302184588Sdfr 1303184588Sdfr if (rqstp->rq_xprt) { 1304184588Sdfr SVC_RELEASE(rqstp->rq_xprt); 1305184588Sdfr } 1306184588Sdfr 1307184588Sdfr if (rqstp->rq_addr) 1308184588Sdfr free(rqstp->rq_addr, M_SONAME); 1309184588Sdfr 1310184588Sdfr if (rqstp->rq_args) 1311184588Sdfr m_freem(rqstp->rq_args); 1312184588Sdfr 1313184588Sdfr free(rqstp, M_RPC); 1314184588Sdfr} 1315