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indent(1): Use NULL instead of zero for pointers.
[freebsd-src.git] / sys / rpc / svc.c
blobea0024bc0b119c211e81c0df23930f9f15073b88
1 /* $NetBSD: svc.c,v 1.21 2000/07/06 03:10:35 christos Exp $ */
2
3 /*-
4 * Copyright (c) 2009, Sun Microsystems, Inc.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are met:
9 * - Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright notice,
12 * this list of conditions and the following disclaimer in the documentation
13 * and/or other materials provided with the distribution.
14 * - Neither the name of Sun Microsystems, Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived
16 * from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28 * POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #if defined(LIBC_SCCS) && !defined(lint)
32 static char *sccsid2 = "@(#)svc.c 1.44 88/02/08 Copyr 1984 Sun Micro";
33 static char *sccsid = "@(#)svc.c 2.4 88/08/11 4.0 RPCSRC";
34 #endif
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
37
38 /*
39 * svc.c, Server-side remote procedure call interface.
40 *
41 * There are two sets of procedures here. The xprt routines are
42 * for handling transport handles. The svc routines handle the
43 * list of service routines.
44 *
45 * Copyright (C) 1984, Sun Microsystems, Inc.
46 */
47
48 #include <sys/param.h>
49 #include <sys/lock.h>
50 #include <sys/kernel.h>
51 #include <sys/kthread.h>
52 #include <sys/malloc.h>
53 #include <sys/mbuf.h>
54 #include <sys/mutex.h>
55 #include <sys/proc.h>
56 #include <sys/queue.h>
57 #include <sys/socketvar.h>
58 #include <sys/systm.h>
59 #include <sys/smp.h>
60 #include <sys/sx.h>
61 #include <sys/ucred.h>
62
63 #include <rpc/rpc.h>
64 #include <rpc/rpcb_clnt.h>
65 #include <rpc/replay.h>
66
67 #include <rpc/rpc_com.h>
68
69 #define SVC_VERSQUIET 0x0001 /* keep quiet about vers mismatch */
70 #define version_keepquiet(xp) (SVC_EXT(xp)->xp_flags & SVC_VERSQUIET)
71
72 static struct svc_callout *svc_find(SVCPOOL *pool, rpcprog_t, rpcvers_t,
73 char *);
74 static void svc_new_thread(SVCGROUP *grp);
75 static void xprt_unregister_locked(SVCXPRT *xprt);
76 static void svc_change_space_used(SVCPOOL *pool, long delta);
77 static bool_t svc_request_space_available(SVCPOOL *pool);
78
79 /* *************** SVCXPRT related stuff **************** */
80
81 static int svcpool_minthread_sysctl(SYSCTL_HANDLER_ARGS);
82 static int svcpool_maxthread_sysctl(SYSCTL_HANDLER_ARGS);
83 static int svcpool_threads_sysctl(SYSCTL_HANDLER_ARGS);
84
85 SVCPOOL*
86 svcpool_create(const char *name, struct sysctl_oid_list *sysctl_base)
87 {
88 SVCPOOL *pool;
89 SVCGROUP *grp;
90 int g;
91
92 pool = malloc(sizeof(SVCPOOL), M_RPC, M_WAITOK|M_ZERO);
93
94 mtx_init(&pool->sp_lock, "sp_lock", NULL, MTX_DEF);
95 pool->sp_name = name;
96 pool->sp_state = SVCPOOL_INIT;
97 pool->sp_proc = NULL;
98 TAILQ_INIT(&pool->sp_callouts);
99 TAILQ_INIT(&pool->sp_lcallouts);
100 pool->sp_minthreads = 1;
101 pool->sp_maxthreads = 1;
102 pool->sp_groupcount = 1;
103 for (g = 0; g < SVC_MAXGROUPS; g++) {
104 grp = &pool->sp_groups[g];
105 mtx_init(&grp->sg_lock, "sg_lock", NULL, MTX_DEF);
106 grp->sg_pool = pool;
107 grp->sg_state = SVCPOOL_ACTIVE;
108 TAILQ_INIT(&grp->sg_xlist);
109 TAILQ_INIT(&grp->sg_active);
110 LIST_INIT(&grp->sg_idlethreads);
111 grp->sg_minthreads = 1;
112 grp->sg_maxthreads = 1;
113 }
114
115 /*
116 * Don't use more than a quarter of mbuf clusters. Nota bene:
117 * nmbclusters is an int, but nmbclusters*MCLBYTES may overflow
118 * on LP64 architectures, so cast to u_long to avoid undefined
119 * behavior. (ILP32 architectures cannot have nmbclusters
120 * large enough to overflow for other reasons.)
121 */
122 pool->sp_space_high = (u_long)nmbclusters * MCLBYTES / 4;
123 pool->sp_space_low = (pool->sp_space_high / 3) * 2;
124
125 sysctl_ctx_init(&pool->sp_sysctl);
126 if (sysctl_base) {
127 SYSCTL_ADD_PROC(&pool->sp_sysctl, sysctl_base, OID_AUTO,
128 "minthreads", CTLTYPE_INT | CTLFLAG_RW,
129 pool, 0, svcpool_minthread_sysctl, "I",
130 "Minimal number of threads");
131 SYSCTL_ADD_PROC(&pool->sp_sysctl, sysctl_base, OID_AUTO,
132 "maxthreads", CTLTYPE_INT | CTLFLAG_RW,
133 pool, 0, svcpool_maxthread_sysctl, "I",
134 "Maximal number of threads");
135 SYSCTL_ADD_PROC(&pool->sp_sysctl, sysctl_base, OID_AUTO,
136 "threads", CTLTYPE_INT | CTLFLAG_RD,
137 pool, 0, svcpool_threads_sysctl, "I",
138 "Current number of threads");
139 SYSCTL_ADD_INT(&pool->sp_sysctl, sysctl_base, OID_AUTO,
140 "groups", CTLFLAG_RD, &pool->sp_groupcount, 0,
141 "Number of thread groups");
142
143 SYSCTL_ADD_ULONG(&pool->sp_sysctl, sysctl_base, OID_AUTO,
144 "request_space_used", CTLFLAG_RD,
145 &pool->sp_space_used,
146 "Space in parsed but not handled requests.");
147
148 SYSCTL_ADD_ULONG(&pool->sp_sysctl, sysctl_base, OID_AUTO,
149 "request_space_used_highest", CTLFLAG_RD,
150 &pool->sp_space_used_highest,
151 "Highest space used since reboot.");
152
153 SYSCTL_ADD_ULONG(&pool->sp_sysctl, sysctl_base, OID_AUTO,
154 "request_space_high", CTLFLAG_RW,
155 &pool->sp_space_high,
156 "Maximum space in parsed but not handled requests.");
157
158 SYSCTL_ADD_ULONG(&pool->sp_sysctl, sysctl_base, OID_AUTO,
159 "request_space_low", CTLFLAG_RW,
160 &pool->sp_space_low,
161 "Low water mark for request space.");
162
163 SYSCTL_ADD_INT(&pool->sp_sysctl, sysctl_base, OID_AUTO,
164 "request_space_throttled", CTLFLAG_RD,
165 &pool->sp_space_throttled, 0,
166 "Whether nfs requests are currently throttled");
167
168 SYSCTL_ADD_INT(&pool->sp_sysctl, sysctl_base, OID_AUTO,
169 "request_space_throttle_count", CTLFLAG_RD,
170 &pool->sp_space_throttle_count, 0,
171 "Count of times throttling based on request space has occurred");
172 }
173
174 return pool;
175 }
176
177 void
178 svcpool_destroy(SVCPOOL *pool)
179 {
180 SVCGROUP *grp;
181 SVCXPRT *xprt, *nxprt;
182 struct svc_callout *s;
183 struct svc_loss_callout *sl;
184 struct svcxprt_list cleanup;
185 int g;
186
187 TAILQ_INIT(&cleanup);
188
189 for (g = 0; g < SVC_MAXGROUPS; g++) {
190 grp = &pool->sp_groups[g];
191 mtx_lock(&grp->sg_lock);
192 while ((xprt = TAILQ_FIRST(&grp->sg_xlist)) != NULL) {
193 xprt_unregister_locked(xprt);
194 TAILQ_INSERT_TAIL(&cleanup, xprt, xp_link);
195 }
196 mtx_unlock(&grp->sg_lock);
197 }
198 TAILQ_FOREACH_SAFE(xprt, &cleanup, xp_link, nxprt) {
199 SVC_RELEASE(xprt);
200 }
201
202 mtx_lock(&pool->sp_lock);
203 while ((s = TAILQ_FIRST(&pool->sp_callouts)) != NULL) {
204 mtx_unlock(&pool->sp_lock);
205 svc_unreg(pool, s->sc_prog, s->sc_vers);
206 mtx_lock(&pool->sp_lock);
207 }
208 while ((sl = TAILQ_FIRST(&pool->sp_lcallouts)) != NULL) {
209 mtx_unlock(&pool->sp_lock);
210 svc_loss_unreg(pool, sl->slc_dispatch);
211 mtx_lock(&pool->sp_lock);
212 }
213 mtx_unlock(&pool->sp_lock);
214
215 for (g = 0; g < SVC_MAXGROUPS; g++) {
216 grp = &pool->sp_groups[g];
217 mtx_destroy(&grp->sg_lock);
218 }
219 mtx_destroy(&pool->sp_lock);
220
221 if (pool->sp_rcache)
222 replay_freecache(pool->sp_rcache);
223
224 sysctl_ctx_free(&pool->sp_sysctl);
225 free(pool, M_RPC);
226 }
227
228 /*
229 * Sysctl handler to get the present thread count on a pool
230 */
231 static int
232 svcpool_threads_sysctl(SYSCTL_HANDLER_ARGS)
233 {
234 SVCPOOL *pool;
235 int threads, error, g;
236
237 pool = oidp->oid_arg1;
238 threads = 0;
239 mtx_lock(&pool->sp_lock);
240 for (g = 0; g < pool->sp_groupcount; g++)
241 threads += pool->sp_groups[g].sg_threadcount;
242 mtx_unlock(&pool->sp_lock);
243 error = sysctl_handle_int(oidp, &threads, 0, req);
244 return (error);
245 }
246
247 /*
248 * Sysctl handler to set the minimum thread count on a pool
249 */
250 static int
251 svcpool_minthread_sysctl(SYSCTL_HANDLER_ARGS)
252 {
253 SVCPOOL *pool;
254 int newminthreads, error, g;
255
256 pool = oidp->oid_arg1;
257 newminthreads = pool->sp_minthreads;
258 error = sysctl_handle_int(oidp, &newminthreads, 0, req);
259 if (error == 0 && newminthreads != pool->sp_minthreads) {
260 if (newminthreads > pool->sp_maxthreads)
261 return (EINVAL);
262 mtx_lock(&pool->sp_lock);
263 pool->sp_minthreads = newminthreads;
264 for (g = 0; g < pool->sp_groupcount; g++) {
265 pool->sp_groups[g].sg_minthreads = max(1,
266 pool->sp_minthreads / pool->sp_groupcount);
267 }
268 mtx_unlock(&pool->sp_lock);
269 }
270 return (error);
271 }
272
273 /*
274 * Sysctl handler to set the maximum thread count on a pool
275 */
276 static int
277 svcpool_maxthread_sysctl(SYSCTL_HANDLER_ARGS)
278 {
279 SVCPOOL *pool;
280 int newmaxthreads, error, g;
281
282 pool = oidp->oid_arg1;
283 newmaxthreads = pool->sp_maxthreads;
284 error = sysctl_handle_int(oidp, &newmaxthreads, 0, req);
285 if (error == 0 && newmaxthreads != pool->sp_maxthreads) {
286 if (newmaxthreads < pool->sp_minthreads)
287 return (EINVAL);
288 mtx_lock(&pool->sp_lock);
289 pool->sp_maxthreads = newmaxthreads;
290 for (g = 0; g < pool->sp_groupcount; g++) {
291 pool->sp_groups[g].sg_maxthreads = max(1,
292 pool->sp_maxthreads / pool->sp_groupcount);
293 }
294 mtx_unlock(&pool->sp_lock);
295 }
296 return (error);
297 }
298
299 /*
300 * Activate a transport handle.
301 */
302 void
303 xprt_register(SVCXPRT *xprt)
304 {
305 SVCPOOL *pool = xprt->xp_pool;
306 SVCGROUP *grp;
307 int g;
308
309 SVC_ACQUIRE(xprt);
310 g = atomic_fetchadd_int(&pool->sp_nextgroup, 1) % pool->sp_groupcount;
311 xprt->xp_group = grp = &pool->sp_groups[g];
312 mtx_lock(&grp->sg_lock);
313 xprt->xp_registered = TRUE;
314 xprt->xp_active = FALSE;
315 TAILQ_INSERT_TAIL(&grp->sg_xlist, xprt, xp_link);
316 mtx_unlock(&grp->sg_lock);
317 }
318
319 /*
320 * De-activate a transport handle. Note: the locked version doesn't
321 * release the transport - caller must do that after dropping the pool
322 * lock.
323 */
324 static void
325 xprt_unregister_locked(SVCXPRT *xprt)
326 {
327 SVCGROUP *grp = xprt->xp_group;
328
329 mtx_assert(&grp->sg_lock, MA_OWNED);
330 KASSERT(xprt->xp_registered == TRUE,
331 ("xprt_unregister_locked: not registered"));
332 xprt_inactive_locked(xprt);
333 TAILQ_REMOVE(&grp->sg_xlist, xprt, xp_link);
334 xprt->xp_registered = FALSE;
335 }
336
337 void
338 xprt_unregister(SVCXPRT *xprt)
339 {
340 SVCGROUP *grp = xprt->xp_group;
341
342 mtx_lock(&grp->sg_lock);
343 if (xprt->xp_registered == FALSE) {
344 /* Already unregistered by another thread */
345 mtx_unlock(&grp->sg_lock);
346 return;
347 }
348 xprt_unregister_locked(xprt);
349 mtx_unlock(&grp->sg_lock);
350
351 SVC_RELEASE(xprt);
352 }
353
354 /*
355 * Attempt to assign a service thread to this transport.
356 */
357 static int
358 xprt_assignthread(SVCXPRT *xprt)
359 {
360 SVCGROUP *grp = xprt->xp_group;
361 SVCTHREAD *st;
362
363 mtx_assert(&grp->sg_lock, MA_OWNED);
364 st = LIST_FIRST(&grp->sg_idlethreads);
365 if (st) {
366 LIST_REMOVE(st, st_ilink);
367 SVC_ACQUIRE(xprt);
368 xprt->xp_thread = st;
369 st->st_xprt = xprt;
370 cv_signal(&st->st_cond);
371 return (TRUE);
372 } else {
373 /*
374 * See if we can create a new thread. The
375 * actual thread creation happens in
376 * svc_run_internal because our locking state
377 * is poorly defined (we are typically called
378 * from a socket upcall). Don't create more
379 * than one thread per second.
380 */
381 if (grp->sg_state == SVCPOOL_ACTIVE
382 && grp->sg_lastcreatetime < time_uptime
383 && grp->sg_threadcount < grp->sg_maxthreads) {
384 grp->sg_state = SVCPOOL_THREADWANTED;
385 }
386 }
387 return (FALSE);
388 }
389
390 void
391 xprt_active(SVCXPRT *xprt)
392 {
393 SVCGROUP *grp = xprt->xp_group;
394
395 mtx_lock(&grp->sg_lock);
396
397 if (!xprt->xp_registered) {
398 /*
399 * Race with xprt_unregister - we lose.
400 */
401 mtx_unlock(&grp->sg_lock);
402 return;
403 }
404
405 if (!xprt->xp_active) {
406 xprt->xp_active = TRUE;
407 if (xprt->xp_thread == NULL) {
408 if (!svc_request_space_available(xprt->xp_pool) ||
409 !xprt_assignthread(xprt))
410 TAILQ_INSERT_TAIL(&grp->sg_active, xprt,
411 xp_alink);
412 }
413 }
414
415 mtx_unlock(&grp->sg_lock);
416 }
417
418 void
419 xprt_inactive_locked(SVCXPRT *xprt)
420 {
421 SVCGROUP *grp = xprt->xp_group;
422
423 mtx_assert(&grp->sg_lock, MA_OWNED);
424 if (xprt->xp_active) {
425 if (xprt->xp_thread == NULL)
426 TAILQ_REMOVE(&grp->sg_active, xprt, xp_alink);
427 xprt->xp_active = FALSE;
428 }
429 }
430
431 void
432 xprt_inactive(SVCXPRT *xprt)
433 {
434 SVCGROUP *grp = xprt->xp_group;
435
436 mtx_lock(&grp->sg_lock);
437 xprt_inactive_locked(xprt);
438 mtx_unlock(&grp->sg_lock);
439 }
440
441 /*
442 * Variant of xprt_inactive() for use only when sure that port is
443 * assigned to thread. For example, within receive handlers.
444 */
445 void
446 xprt_inactive_self(SVCXPRT *xprt)
447 {
448
449 KASSERT(xprt->xp_thread != NULL,
450 ("xprt_inactive_self(%p) with NULL xp_thread", xprt));
451 xprt->xp_active = FALSE;
452 }
453
454 /*
455 * Add a service program to the callout list.
456 * The dispatch routine will be called when a rpc request for this
457 * program number comes in.
458 */
459 bool_t
460 svc_reg(SVCXPRT *xprt, const rpcprog_t prog, const rpcvers_t vers,
461 void (*dispatch)(struct svc_req *, SVCXPRT *),
462 const struct netconfig *nconf)
463 {
464 SVCPOOL *pool = xprt->xp_pool;
465 struct svc_callout *s;
466 char *netid = NULL;
467 int flag = 0;
468
469 /* VARIABLES PROTECTED BY svc_lock: s, svc_head */
470
471 if (xprt->xp_netid) {
472 netid = strdup(xprt->xp_netid, M_RPC);
473 flag = 1;
474 } else if (nconf && nconf->nc_netid) {
475 netid = strdup(nconf->nc_netid, M_RPC);
476 flag = 1;
477 } /* must have been created with svc_raw_create */
478 if ((netid == NULL) && (flag == 1)) {
479 return (FALSE);
480 }
481
482 mtx_lock(&pool->sp_lock);
483 if ((s = svc_find(pool, prog, vers, netid)) != NULL) {
484 if (netid)
485 free(netid, M_RPC);
486 if (s->sc_dispatch == dispatch)
487 goto rpcb_it; /* he is registering another xptr */
488 mtx_unlock(&pool->sp_lock);
489 return (FALSE);
490 }
491 s = malloc(sizeof (struct svc_callout), M_RPC, M_NOWAIT);
492 if (s == NULL) {
493 if (netid)
494 free(netid, M_RPC);
495 mtx_unlock(&pool->sp_lock);
496 return (FALSE);
497 }
498
499 s->sc_prog = prog;
500 s->sc_vers = vers;
501 s->sc_dispatch = dispatch;
502 s->sc_netid = netid;
503 TAILQ_INSERT_TAIL(&pool->sp_callouts, s, sc_link);
504
505 if ((xprt->xp_netid == NULL) && (flag == 1) && netid)
506 ((SVCXPRT *) xprt)->xp_netid = strdup(netid, M_RPC);
507
508 rpcb_it:
509 mtx_unlock(&pool->sp_lock);
510 /* now register the information with the local binder service */
511 if (nconf) {
512 bool_t dummy;
513 struct netconfig tnc;
514 struct netbuf nb;
515 tnc = *nconf;
516 nb.buf = &xprt->xp_ltaddr;
517 nb.len = xprt->xp_ltaddr.ss_len;
518 dummy = rpcb_set(prog, vers, &tnc, &nb);
519 return (dummy);
520 }
521 return (TRUE);
522 }
523
524 /*
525 * Remove a service program from the callout list.
526 */
527 void
528 svc_unreg(SVCPOOL *pool, const rpcprog_t prog, const rpcvers_t vers)
529 {
530 struct svc_callout *s;
531
532 /* unregister the information anyway */
533 (void) rpcb_unset(prog, vers, NULL);
534 mtx_lock(&pool->sp_lock);
535 while ((s = svc_find(pool, prog, vers, NULL)) != NULL) {
536 TAILQ_REMOVE(&pool->sp_callouts, s, sc_link);
537 if (s->sc_netid)
538 mem_free(s->sc_netid, sizeof (s->sc_netid) + 1);
539 mem_free(s, sizeof (struct svc_callout));
540 }
541 mtx_unlock(&pool->sp_lock);
542 }
543
544 /*
545 * Add a service connection loss program to the callout list.
546 * The dispatch routine will be called when some port in ths pool die.
547 */
548 bool_t
549 svc_loss_reg(SVCXPRT *xprt, void (*dispatch)(SVCXPRT *))
550 {
551 SVCPOOL *pool = xprt->xp_pool;
552 struct svc_loss_callout *s;
553
554 mtx_lock(&pool->sp_lock);
555 TAILQ_FOREACH(s, &pool->sp_lcallouts, slc_link) {
556 if (s->slc_dispatch == dispatch)
557 break;
558 }
559 if (s != NULL) {
560 mtx_unlock(&pool->sp_lock);
561 return (TRUE);
562 }
563 s = malloc(sizeof(struct svc_loss_callout), M_RPC, M_NOWAIT);
564 if (s == NULL) {
565 mtx_unlock(&pool->sp_lock);
566 return (FALSE);
567 }
568 s->slc_dispatch = dispatch;
569 TAILQ_INSERT_TAIL(&pool->sp_lcallouts, s, slc_link);
570 mtx_unlock(&pool->sp_lock);
571 return (TRUE);
572 }
573
574 /*
575 * Remove a service connection loss program from the callout list.
576 */
577 void
578 svc_loss_unreg(SVCPOOL *pool, void (*dispatch)(SVCXPRT *))
579 {
580 struct svc_loss_callout *s;
581
582 mtx_lock(&pool->sp_lock);
583 TAILQ_FOREACH(s, &pool->sp_lcallouts, slc_link) {
584 if (s->slc_dispatch == dispatch) {
585 TAILQ_REMOVE(&pool->sp_lcallouts, s, slc_link);
586 free(s, M_RPC);
587 break;
588 }
589 }
590 mtx_unlock(&pool->sp_lock);
591 }
592
593 /* ********************** CALLOUT list related stuff ************* */
594
595 /*
596 * Search the callout list for a program number, return the callout
597 * struct.
598 */
599 static struct svc_callout *
600 svc_find(SVCPOOL *pool, rpcprog_t prog, rpcvers_t vers, char *netid)
601 {
602 struct svc_callout *s;
603
604 mtx_assert(&pool->sp_lock, MA_OWNED);
605 TAILQ_FOREACH(s, &pool->sp_callouts, sc_link) {
606 if (s->sc_prog == prog && s->sc_vers == vers
607 && (netid == NULL || s->sc_netid == NULL ||
608 strcmp(netid, s->sc_netid) == 0))
609 break;
610 }
611
612 return (s);
613 }
614
615 /* ******************* REPLY GENERATION ROUTINES ************ */
616
617 static bool_t
618 svc_sendreply_common(struct svc_req *rqstp, struct rpc_msg *rply,
619 struct mbuf *body)
620 {
621 SVCXPRT *xprt = rqstp->rq_xprt;
622 bool_t ok;
623
624 if (rqstp->rq_args) {
625 m_freem(rqstp->rq_args);
626 rqstp->rq_args = NULL;
627 }
628
629 if (xprt->xp_pool->sp_rcache)
630 replay_setreply(xprt->xp_pool->sp_rcache,
631 rply, svc_getrpccaller(rqstp), body);
632
633 if (!SVCAUTH_WRAP(&rqstp->rq_auth, &body))
634 return (FALSE);
635
636 ok = SVC_REPLY(xprt, rply, rqstp->rq_addr, body, &rqstp->rq_reply_seq);
637 if (rqstp->rq_addr) {
638 free(rqstp->rq_addr, M_SONAME);
639 rqstp->rq_addr = NULL;
640 }
641
642 return (ok);
643 }
644
645 /*
646 * Send a reply to an rpc request
647 */
648 bool_t
649 svc_sendreply(struct svc_req *rqstp, xdrproc_t xdr_results, void * xdr_location)
650 {
651 struct rpc_msg rply;
652 struct mbuf *m;
653 XDR xdrs;
654 bool_t ok;
655
656 rply.rm_xid = rqstp->rq_xid;
657 rply.rm_direction = REPLY;
658 rply.rm_reply.rp_stat = MSG_ACCEPTED;
659 rply.acpted_rply.ar_verf = rqstp->rq_verf;
660 rply.acpted_rply.ar_stat = SUCCESS;
661 rply.acpted_rply.ar_results.where = NULL;
662 rply.acpted_rply.ar_results.proc = (xdrproc_t) xdr_void;
663
664 m = m_getcl(M_WAITOK, MT_DATA, 0);
665 xdrmbuf_create(&xdrs, m, XDR_ENCODE);
666 ok = xdr_results(&xdrs, xdr_location);
667 XDR_DESTROY(&xdrs);
668
669 if (ok) {
670 return (svc_sendreply_common(rqstp, &rply, m));
671 } else {
672 m_freem(m);
673 return (FALSE);
674 }
675 }
676
677 bool_t
678 svc_sendreply_mbuf(struct svc_req *rqstp, struct mbuf *m)
679 {
680 struct rpc_msg rply;
681
682 rply.rm_xid = rqstp->rq_xid;
683 rply.rm_direction = REPLY;
684 rply.rm_reply.rp_stat = MSG_ACCEPTED;
685 rply.acpted_rply.ar_verf = rqstp->rq_verf;
686 rply.acpted_rply.ar_stat = SUCCESS;
687 rply.acpted_rply.ar_results.where = NULL;
688 rply.acpted_rply.ar_results.proc = (xdrproc_t) xdr_void;
689
690 return (svc_sendreply_common(rqstp, &rply, m));
691 }
692
693 /*
694 * No procedure error reply
695 */
696 void
697 svcerr_noproc(struct svc_req *rqstp)
698 {
699 SVCXPRT *xprt = rqstp->rq_xprt;
700 struct rpc_msg rply;
701
702 rply.rm_xid = rqstp->rq_xid;
703 rply.rm_direction = REPLY;
704 rply.rm_reply.rp_stat = MSG_ACCEPTED;
705 rply.acpted_rply.ar_verf = rqstp->rq_verf;
706 rply.acpted_rply.ar_stat = PROC_UNAVAIL;
707
708 if (xprt->xp_pool->sp_rcache)
709 replay_setreply(xprt->xp_pool->sp_rcache,
710 &rply, svc_getrpccaller(rqstp), NULL);
711
712 svc_sendreply_common(rqstp, &rply, NULL);
713 }
714
715 /*
716 * Can't decode args error reply
717 */
718 void
719 svcerr_decode(struct svc_req *rqstp)
720 {
721 SVCXPRT *xprt = rqstp->rq_xprt;
722 struct rpc_msg rply;
723
724 rply.rm_xid = rqstp->rq_xid;
725 rply.rm_direction = REPLY;
726 rply.rm_reply.rp_stat = MSG_ACCEPTED;
727 rply.acpted_rply.ar_verf = rqstp->rq_verf;
728 rply.acpted_rply.ar_stat = GARBAGE_ARGS;
729
730 if (xprt->xp_pool->sp_rcache)
731 replay_setreply(xprt->xp_pool->sp_rcache,
732 &rply, (struct sockaddr *) &xprt->xp_rtaddr, NULL);
733
734 svc_sendreply_common(rqstp, &rply, NULL);
735 }
736
737 /*
738 * Some system error
739 */
740 void
741 svcerr_systemerr(struct svc_req *rqstp)
742 {
743 SVCXPRT *xprt = rqstp->rq_xprt;
744 struct rpc_msg rply;
745
746 rply.rm_xid = rqstp->rq_xid;
747 rply.rm_direction = REPLY;
748 rply.rm_reply.rp_stat = MSG_ACCEPTED;
749 rply.acpted_rply.ar_verf = rqstp->rq_verf;
750 rply.acpted_rply.ar_stat = SYSTEM_ERR;
751
752 if (xprt->xp_pool->sp_rcache)
753 replay_setreply(xprt->xp_pool->sp_rcache,
754 &rply, svc_getrpccaller(rqstp), NULL);
755
756 svc_sendreply_common(rqstp, &rply, NULL);
757 }
758
759 /*
760 * Authentication error reply
761 */
762 void
763 svcerr_auth(struct svc_req *rqstp, enum auth_stat why)
764 {
765 SVCXPRT *xprt = rqstp->rq_xprt;
766 struct rpc_msg rply;
767
768 rply.rm_xid = rqstp->rq_xid;
769 rply.rm_direction = REPLY;
770 rply.rm_reply.rp_stat = MSG_DENIED;
771 rply.rjcted_rply.rj_stat = AUTH_ERROR;
772 rply.rjcted_rply.rj_why = why;
773
774 if (xprt->xp_pool->sp_rcache)
775 replay_setreply(xprt->xp_pool->sp_rcache,
776 &rply, svc_getrpccaller(rqstp), NULL);
777
778 svc_sendreply_common(rqstp, &rply, NULL);
779 }
780
781 /*
782 * Auth too weak error reply
783 */
784 void
785 svcerr_weakauth(struct svc_req *rqstp)
786 {
787
788 svcerr_auth(rqstp, AUTH_TOOWEAK);
789 }
790
791 /*
792 * Program unavailable error reply
793 */
794 void
795 svcerr_noprog(struct svc_req *rqstp)
796 {
797 SVCXPRT *xprt = rqstp->rq_xprt;
798 struct rpc_msg rply;
799
800 rply.rm_xid = rqstp->rq_xid;
801 rply.rm_direction = REPLY;
802 rply.rm_reply.rp_stat = MSG_ACCEPTED;
803 rply.acpted_rply.ar_verf = rqstp->rq_verf;
804 rply.acpted_rply.ar_stat = PROG_UNAVAIL;
805
806 if (xprt->xp_pool->sp_rcache)
807 replay_setreply(xprt->xp_pool->sp_rcache,
808 &rply, svc_getrpccaller(rqstp), NULL);
809
810 svc_sendreply_common(rqstp, &rply, NULL);
811 }
812
813 /*
814 * Program version mismatch error reply
815 */
816 void
817 svcerr_progvers(struct svc_req *rqstp, rpcvers_t low_vers, rpcvers_t high_vers)
818 {
819 SVCXPRT *xprt = rqstp->rq_xprt;
820 struct rpc_msg rply;
821
822 rply.rm_xid = rqstp->rq_xid;
823 rply.rm_direction = REPLY;
824 rply.rm_reply.rp_stat = MSG_ACCEPTED;
825 rply.acpted_rply.ar_verf = rqstp->rq_verf;
826 rply.acpted_rply.ar_stat = PROG_MISMATCH;
827 rply.acpted_rply.ar_vers.low = (uint32_t)low_vers;
828 rply.acpted_rply.ar_vers.high = (uint32_t)high_vers;
829
830 if (xprt->xp_pool->sp_rcache)
831 replay_setreply(xprt->xp_pool->sp_rcache,
832 &rply, svc_getrpccaller(rqstp), NULL);
833
834 svc_sendreply_common(rqstp, &rply, NULL);
835 }
836
837 /*
838 * Allocate a new server transport structure. All fields are
839 * initialized to zero and xp_p3 is initialized to point at an
840 * extension structure to hold various flags and authentication
841 * parameters.
842 */
843 SVCXPRT *
844 svc_xprt_alloc(void)
845 {
846 SVCXPRT *xprt;
847 SVCXPRT_EXT *ext;
848
849 xprt = mem_alloc(sizeof(SVCXPRT));
850 ext = mem_alloc(sizeof(SVCXPRT_EXT));
851 xprt->xp_p3 = ext;
852 refcount_init(&xprt->xp_refs, 1);
853
854 return (xprt);
855 }
856
857 /*
858 * Free a server transport structure.
859 */
860 void
861 svc_xprt_free(SVCXPRT *xprt)
862 {
863
864 mem_free(xprt->xp_p3, sizeof(SVCXPRT_EXT));
865 mem_free(xprt, sizeof(SVCXPRT));
866 }
867
868 /* ******************* SERVER INPUT STUFF ******************* */
869
870 /*
871 * Read RPC requests from a transport and queue them to be
872 * executed. We handle authentication and replay cache replies here.
873 * Actually dispatching the RPC is deferred till svc_executereq.
874 */
875 static enum xprt_stat
876 svc_getreq(SVCXPRT *xprt, struct svc_req **rqstp_ret)
877 {
878 SVCPOOL *pool = xprt->xp_pool;
879 struct svc_req *r;
880 struct rpc_msg msg;
881 struct mbuf *args;
882 struct svc_loss_callout *s;
883 enum xprt_stat stat;
884
885 /* now receive msgs from xprtprt (support batch calls) */
886 r = malloc(sizeof(*r), M_RPC, M_WAITOK|M_ZERO);
887
888 msg.rm_call.cb_cred.oa_base = r->rq_credarea;
889 msg.rm_call.cb_verf.oa_base = &r->rq_credarea[MAX_AUTH_BYTES];
890 r->rq_clntcred = &r->rq_credarea[2*MAX_AUTH_BYTES];
891 if (SVC_RECV(xprt, &msg, &r->rq_addr, &args)) {
892 enum auth_stat why;
893
894 /*
895 * Handle replays and authenticate before queuing the
896 * request to be executed.
897 */
898 SVC_ACQUIRE(xprt);
899 r->rq_xprt = xprt;
900 if (pool->sp_rcache) {
901 struct rpc_msg repmsg;
902 struct mbuf *repbody;
903 enum replay_state rs;
904 rs = replay_find(pool->sp_rcache, &msg,
905 svc_getrpccaller(r), &repmsg, &repbody);
906 switch (rs) {
907 case RS_NEW:
908 break;
909 case RS_DONE:
910 SVC_REPLY(xprt, &repmsg, r->rq_addr,
911 repbody, &r->rq_reply_seq);
912 if (r->rq_addr) {
913 free(r->rq_addr, M_SONAME);
914 r->rq_addr = NULL;
915 }
916 m_freem(args);
917 goto call_done;
918
919 default:
920 m_freem(args);
921 goto call_done;
922 }
923 }
924
925 r->rq_xid = msg.rm_xid;
926 r->rq_prog = msg.rm_call.cb_prog;
927 r->rq_vers = msg.rm_call.cb_vers;
928 r->rq_proc = msg.rm_call.cb_proc;
929 r->rq_size = sizeof(*r) + m_length(args, NULL);
930 r->rq_args = args;
931 if ((why = _authenticate(r, &msg)) != AUTH_OK) {
932 /*
933 * RPCSEC_GSS uses this return code
934 * for requests that form part of its
935 * context establishment protocol and
936 * should not be dispatched to the
937 * application.
938 */
939 if (why != RPCSEC_GSS_NODISPATCH)
940 svcerr_auth(r, why);
941 goto call_done;
942 }
943
944 if (!SVCAUTH_UNWRAP(&r->rq_auth, &r->rq_args)) {
945 svcerr_decode(r);
946 goto call_done;
947 }
948
949 /*
950 * Everything checks out, return request to caller.
951 */
952 *rqstp_ret = r;
953 r = NULL;
954 }
955 call_done:
956 if (r) {
957 svc_freereq(r);
958 r = NULL;
959 }
960 if ((stat = SVC_STAT(xprt)) == XPRT_DIED) {
961 TAILQ_FOREACH(s, &pool->sp_lcallouts, slc_link)
962 (*s->slc_dispatch)(xprt);
963 xprt_unregister(xprt);
964 }
965
966 return (stat);
967 }
968
969 static void
970 svc_executereq(struct svc_req *rqstp)
971 {
972 SVCXPRT *xprt = rqstp->rq_xprt;
973 SVCPOOL *pool = xprt->xp_pool;
974 int prog_found;
975 rpcvers_t low_vers;
976 rpcvers_t high_vers;
977 struct svc_callout *s;
978
979 /* now match message with a registered service*/
980 prog_found = FALSE;
981 low_vers = (rpcvers_t) -1L;
982 high_vers = (rpcvers_t) 0L;
983 TAILQ_FOREACH(s, &pool->sp_callouts, sc_link) {
984 if (s->sc_prog == rqstp->rq_prog) {
985 if (s->sc_vers == rqstp->rq_vers) {
986 /*
987 * We hand ownership of r to the
988 * dispatch method - they must call
989 * svc_freereq.
990 */
991 (*s->sc_dispatch)(rqstp, xprt);
992 return;
993 } /* found correct version */
994 prog_found = TRUE;
995 if (s->sc_vers < low_vers)
996 low_vers = s->sc_vers;
997 if (s->sc_vers > high_vers)
998 high_vers = s->sc_vers;
999 } /* found correct program */
1000 }
1001
1002 /*
1003 * if we got here, the program or version
1004 * is not served ...
1005 */
1006 if (prog_found)
1007 svcerr_progvers(rqstp, low_vers, high_vers);
1008 else
1009 svcerr_noprog(rqstp);
1010
1011 svc_freereq(rqstp);
1012 }
1013
1014 static void
1015 svc_checkidle(SVCGROUP *grp)
1016 {
1017 SVCXPRT *xprt, *nxprt;
1018 time_t timo;
1019 struct svcxprt_list cleanup;
1020
1021 TAILQ_INIT(&cleanup);
1022 TAILQ_FOREACH_SAFE(xprt, &grp->sg_xlist, xp_link, nxprt) {
1023 /*
1024 * Only some transports have idle timers. Don't time
1025 * something out which is just waking up.
1026 */
1027 if (!xprt->xp_idletimeout || xprt->xp_thread)
1028 continue;
1029
1030 timo = xprt->xp_lastactive + xprt->xp_idletimeout;
1031 if (time_uptime > timo) {
1032 xprt_unregister_locked(xprt);
1033 TAILQ_INSERT_TAIL(&cleanup, xprt, xp_link);
1034 }
1035 }
1036
1037 mtx_unlock(&grp->sg_lock);
1038 TAILQ_FOREACH_SAFE(xprt, &cleanup, xp_link, nxprt) {
1039 SVC_RELEASE(xprt);
1040 }
1041 mtx_lock(&grp->sg_lock);
1042 }
1043
1044 static void
1045 svc_assign_waiting_sockets(SVCPOOL *pool)
1046 {
1047 SVCGROUP *grp;
1048 SVCXPRT *xprt;
1049 int g;
1050
1051 for (g = 0; g < pool->sp_groupcount; g++) {
1052 grp = &pool->sp_groups[g];
1053 mtx_lock(&grp->sg_lock);
1054 while ((xprt = TAILQ_FIRST(&grp->sg_active)) != NULL) {
1055 if (xprt_assignthread(xprt))
1056 TAILQ_REMOVE(&grp->sg_active, xprt, xp_alink);
1057 else
1058 break;
1059 }
1060 mtx_unlock(&grp->sg_lock);
1061 }
1062 }
1063
1064 static void
1065 svc_change_space_used(SVCPOOL *pool, long delta)
1066 {
1067 unsigned long value;
1068
1069 value = atomic_fetchadd_long(&pool->sp_space_used, delta) + delta;
1070 if (delta > 0) {
1071 if (value >= pool->sp_space_high && !pool->sp_space_throttled) {
1072 pool->sp_space_throttled = TRUE;
1073 pool->sp_space_throttle_count++;
1074 }
1075 if (value > pool->sp_space_used_highest)
1076 pool->sp_space_used_highest = value;
1077 } else {
1078 if (value < pool->sp_space_low && pool->sp_space_throttled) {
1079 pool->sp_space_throttled = FALSE;
1080 svc_assign_waiting_sockets(pool);
1081 }
1082 }
1083 }
1084
1085 static bool_t
1086 svc_request_space_available(SVCPOOL *pool)
1087 {
1088
1089 if (pool->sp_space_throttled)
1090 return (FALSE);
1091 return (TRUE);
1092 }
1093
1094 static void
1095 svc_run_internal(SVCGROUP *grp, bool_t ismaster)
1096 {
1097 SVCPOOL *pool = grp->sg_pool;
1098 SVCTHREAD *st, *stpref;
1099 SVCXPRT *xprt;
1100 enum xprt_stat stat;
1101 struct svc_req *rqstp;
1102 struct proc *p;
1103 long sz;
1104 int error;
1105
1106 st = mem_alloc(sizeof(*st));
1107 mtx_init(&st->st_lock, "st_lock", NULL, MTX_DEF);
1108 st->st_pool = pool;
1109 st->st_xprt = NULL;
1110 STAILQ_INIT(&st->st_reqs);
1111 cv_init(&st->st_cond, "rpcsvc");
1112
1113 mtx_lock(&grp->sg_lock);
1114
1115 /*
1116 * If we are a new thread which was spawned to cope with
1117 * increased load, set the state back to SVCPOOL_ACTIVE.
1118 */
1119 if (grp->sg_state == SVCPOOL_THREADSTARTING)
1120 grp->sg_state = SVCPOOL_ACTIVE;
1121
1122 while (grp->sg_state != SVCPOOL_CLOSING) {
1123 /*
1124 * Create new thread if requested.
1125 */
1126 if (grp->sg_state == SVCPOOL_THREADWANTED) {
1127 grp->sg_state = SVCPOOL_THREADSTARTING;
1128 grp->sg_lastcreatetime = time_uptime;
1129 mtx_unlock(&grp->sg_lock);
1130 svc_new_thread(grp);
1131 mtx_lock(&grp->sg_lock);
1132 continue;
1133 }
1134
1135 /*
1136 * Check for idle transports once per second.
1137 */
1138 if (time_uptime > grp->sg_lastidlecheck) {
1139 grp->sg_lastidlecheck = time_uptime;
1140 svc_checkidle(grp);
1141 }
1142
1143 xprt = st->st_xprt;
1144 if (!xprt) {
1145 /*
1146 * Enforce maxthreads count.
1147 */
1148 if (grp->sg_threadcount > grp->sg_maxthreads)
1149 break;
1150
1151 /*
1152 * Before sleeping, see if we can find an
1153 * active transport which isn't being serviced
1154 * by a thread.
1155 */
1156 if (svc_request_space_available(pool) &&
1157 (xprt = TAILQ_FIRST(&grp->sg_active)) != NULL) {
1158 TAILQ_REMOVE(&grp->sg_active, xprt, xp_alink);
1159 SVC_ACQUIRE(xprt);
1160 xprt->xp_thread = st;
1161 st->st_xprt = xprt;
1162 continue;
1163 }
1164
1165 LIST_INSERT_HEAD(&grp->sg_idlethreads, st, st_ilink);
1166 if (ismaster || (!ismaster &&
1167 grp->sg_threadcount > grp->sg_minthreads))
1168 error = cv_timedwait_sig(&st->st_cond,
1169 &grp->sg_lock, 5 * hz);
1170 else
1171 error = cv_wait_sig(&st->st_cond,
1172 &grp->sg_lock);
1173 if (st->st_xprt == NULL)
1174 LIST_REMOVE(st, st_ilink);
1175
1176 /*
1177 * Reduce worker thread count when idle.
1178 */
1179 if (error == EWOULDBLOCK) {
1180 if (!ismaster
1181 && (grp->sg_threadcount
1182 > grp->sg_minthreads)
1183 && !st->st_xprt)
1184 break;
1185 } else if (error != 0) {
1186 KASSERT(error == EINTR || error == ERESTART,
1187 ("non-signal error %d", error));
1188 mtx_unlock(&grp->sg_lock);
1189 p = curproc;
1190 PROC_LOCK(p);
1191 if (P_SHOULDSTOP(p) ||
1192 (p->p_flag & P_TOTAL_STOP) != 0) {
1193 thread_suspend_check(0);
1194 PROC_UNLOCK(p);
1195 mtx_lock(&grp->sg_lock);
1196 } else {
1197 PROC_UNLOCK(p);
1198 svc_exit(pool);
1199 mtx_lock(&grp->sg_lock);
1200 break;
1201 }
1202 }
1203 continue;
1204 }
1205 mtx_unlock(&grp->sg_lock);
1206
1207 /*
1208 * Drain the transport socket and queue up any RPCs.
1209 */
1210 xprt->xp_lastactive = time_uptime;
1211 do {
1212 if (!svc_request_space_available(pool))
1213 break;
1214 rqstp = NULL;
1215 stat = svc_getreq(xprt, &rqstp);
1216 if (rqstp) {
1217 svc_change_space_used(pool, rqstp->rq_size);
1218 /*
1219 * See if the application has a preference
1220 * for some other thread.
1221 */
1222 if (pool->sp_assign) {
1223 stpref = pool->sp_assign(st, rqstp);
1224 rqstp->rq_thread = stpref;
1225 STAILQ_INSERT_TAIL(&stpref->st_reqs,
1226 rqstp, rq_link);
1227 mtx_unlock(&stpref->st_lock);
1228 if (stpref != st)
1229 rqstp = NULL;
1230 } else {
1231 rqstp->rq_thread = st;
1232 STAILQ_INSERT_TAIL(&st->st_reqs,
1233 rqstp, rq_link);
1234 }
1235 }
1236 } while (rqstp == NULL && stat == XPRT_MOREREQS
1237 && grp->sg_state != SVCPOOL_CLOSING);
1238
1239 /*
1240 * Move this transport to the end of the active list to
1241 * ensure fairness when multiple transports are active.
1242 * If this was the last queued request, svc_getreq will end
1243 * up calling xprt_inactive to remove from the active list.
1244 */
1245 mtx_lock(&grp->sg_lock);
1246 xprt->xp_thread = NULL;
1247 st->st_xprt = NULL;
1248 if (xprt->xp_active) {
1249 if (!svc_request_space_available(pool) ||
1250 !xprt_assignthread(xprt))
1251 TAILQ_INSERT_TAIL(&grp->sg_active,
1252 xprt, xp_alink);
1253 }
1254 mtx_unlock(&grp->sg_lock);
1255 SVC_RELEASE(xprt);
1256
1257 /*
1258 * Execute what we have queued.
1259 */
1260 mtx_lock(&st->st_lock);
1261 while ((rqstp = STAILQ_FIRST(&st->st_reqs)) != NULL) {
1262 STAILQ_REMOVE_HEAD(&st->st_reqs, rq_link);
1263 mtx_unlock(&st->st_lock);
1264 sz = (long)rqstp->rq_size;
1265 svc_executereq(rqstp);
1266 svc_change_space_used(pool, -sz);
1267 mtx_lock(&st->st_lock);
1268 }
1269 mtx_unlock(&st->st_lock);
1270 mtx_lock(&grp->sg_lock);
1271 }
1272
1273 if (st->st_xprt) {
1274 xprt = st->st_xprt;
1275 st->st_xprt = NULL;
1276 SVC_RELEASE(xprt);
1277 }
1278 KASSERT(STAILQ_EMPTY(&st->st_reqs), ("stray reqs on exit"));
1279 mtx_destroy(&st->st_lock);
1280 cv_destroy(&st->st_cond);
1281 mem_free(st, sizeof(*st));
1282
1283 grp->sg_threadcount--;
1284 if (!ismaster)
1285 wakeup(grp);
1286 mtx_unlock(&grp->sg_lock);
1287 }
1288
1289 static void
1290 svc_thread_start(void *arg)
1291 {
1292
1293 svc_run_internal((SVCGROUP *) arg, FALSE);
1294 kthread_exit();
1295 }
1296
1297 static void
1298 svc_new_thread(SVCGROUP *grp)
1299 {
1300 SVCPOOL *pool = grp->sg_pool;
1301 struct thread *td;
1302
1303 mtx_lock(&grp->sg_lock);
1304 grp->sg_threadcount++;
1305 mtx_unlock(&grp->sg_lock);
1306 kthread_add(svc_thread_start, grp, pool->sp_proc, &td, 0, 0,
1307 "%s: service", pool->sp_name);
1308 }
1309
1310 void
1311 svc_run(SVCPOOL *pool)
1312 {
1313 int g, i;
1314 struct proc *p;
1315 struct thread *td;
1316 SVCGROUP *grp;
1317
1318 p = curproc;
1319 td = curthread;
1320 snprintf(td->td_name, sizeof(td->td_name),
1321 "%s: master", pool->sp_name);
1322 pool->sp_state = SVCPOOL_ACTIVE;
1323 pool->sp_proc = p;
1324
1325 /* Choose group count based on number of threads and CPUs. */
1326 pool->sp_groupcount = max(1, min(SVC_MAXGROUPS,
1327 min(pool->sp_maxthreads / 2, mp_ncpus) / 6));
1328 for (g = 0; g < pool->sp_groupcount; g++) {
1329 grp = &pool->sp_groups[g];
1330 grp->sg_minthreads = max(1,
1331 pool->sp_minthreads / pool->sp_groupcount);
1332 grp->sg_maxthreads = max(1,
1333 pool->sp_maxthreads / pool->sp_groupcount);
1334 grp->sg_lastcreatetime = time_uptime;
1335 }
1336
1337 /* Starting threads */
1338 pool->sp_groups[0].sg_threadcount++;
1339 for (g = 0; g < pool->sp_groupcount; g++) {
1340 grp = &pool->sp_groups[g];
1341 for (i = ((g == 0) ? 1 : 0); i < grp->sg_minthreads; i++)
1342 svc_new_thread(grp);
1343 }
1344 svc_run_internal(&pool->sp_groups[0], TRUE);
1345
1346 /* Waiting for threads to stop. */
1347 for (g = 0; g < pool->sp_groupcount; g++) {
1348 grp = &pool->sp_groups[g];
1349 mtx_lock(&grp->sg_lock);
1350 while (grp->sg_threadcount > 0)
1351 msleep(grp, &grp->sg_lock, 0, "svcexit", 0);
1352 mtx_unlock(&grp->sg_lock);
1353 }
1354 }
1355
1356 void
1357 svc_exit(SVCPOOL *pool)
1358 {
1359 SVCGROUP *grp;
1360 SVCTHREAD *st;
1361 int g;
1362
1363 pool->sp_state = SVCPOOL_CLOSING;
1364 for (g = 0; g < pool->sp_groupcount; g++) {
1365 grp = &pool->sp_groups[g];
1366 mtx_lock(&grp->sg_lock);
1367 if (grp->sg_state != SVCPOOL_CLOSING) {
1368 grp->sg_state = SVCPOOL_CLOSING;
1369 LIST_FOREACH(st, &grp->sg_idlethreads, st_ilink)
1370 cv_signal(&st->st_cond);
1371 }
1372 mtx_unlock(&grp->sg_lock);
1373 }
1374 }
1375
1376 bool_t
1377 svc_getargs(struct svc_req *rqstp, xdrproc_t xargs, void *args)
1378 {
1379 struct mbuf *m;
1380 XDR xdrs;
1381 bool_t stat;
1382
1383 m = rqstp->rq_args;
1384 rqstp->rq_args = NULL;
1385
1386 xdrmbuf_create(&xdrs, m, XDR_DECODE);
1387 stat = xargs(&xdrs, args);
1388 XDR_DESTROY(&xdrs);
1389
1390 return (stat);
1391 }
1392
1393 bool_t
1394 svc_freeargs(struct svc_req *rqstp, xdrproc_t xargs, void *args)
1395 {
1396 XDR xdrs;
1397
1398 if (rqstp->rq_addr) {
1399 free(rqstp->rq_addr, M_SONAME);
1400 rqstp->rq_addr = NULL;
1401 }
1402
1403 xdrs.x_op = XDR_FREE;
1404 return (xargs(&xdrs, args));
1405 }
1406
1407 void
1408 svc_freereq(struct svc_req *rqstp)
1409 {
1410 SVCTHREAD *st;
1411 SVCPOOL *pool;
1412
1413 st = rqstp->rq_thread;
1414 if (st) {
1415 pool = st->st_pool;
1416 if (pool->sp_done)
1417 pool->sp_done(st, rqstp);
1418 }
1419
1420 if (rqstp->rq_auth.svc_ah_ops)
1421 SVCAUTH_RELEASE(&rqstp->rq_auth);
1422
1423 if (rqstp->rq_xprt) {
1424 SVC_RELEASE(rqstp->rq_xprt);
1425 }
1426
1427 if (rqstp->rq_addr)
1428 free(rqstp->rq_addr, M_SONAME);
1429
1430 if (rqstp->rq_args)
1431 m_freem(rqstp->rq_args);
1432
1433 free(rqstp, M_RPC);
1434 }
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