1 /* $NetBSD: svc.h,v 1.17 2000/06/02 22:57:56 fvdl Exp $ */ 2 3 /*- 4 * SPDX-License-Identifier: BSD-3-Clause 5 * 6 * Copyright (c) 2009, Sun Microsystems, Inc. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions are met: 11 * - Redistributions of source code must retain the above copyright notice, 12 * this list of conditions and the following disclaimer. 13 * - Redistributions in binary form must reproduce the above copyright notice, 14 * this list of conditions and the following disclaimer in the documentation 15 * and/or other materials provided with the distribution. 16 * - Neither the name of Sun Microsystems, Inc. nor the names of its 17 * contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 21 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * svc.h, Server-side remote procedure call interface. 35 * 36 * Copyright (C) 1986-1993 by Sun Microsystems, Inc. 37 */ 38 39 #ifndef _RPC_SVC_H 40 #define _RPC_SVC_H 41 #include <sys/cdefs.h> 42 43 #include <sys/queue.h> 44 #include <sys/_lock.h> 45 #include <sys/_mutex.h> 46 #include <sys/_sx.h> 47 #include <sys/condvar.h> 48 #include <sys/sysctl.h> 49 50 /* 51 * This interface must manage two items concerning remote procedure calling: 52 * 53 * 1) An arbitrary number of transport connections upon which rpc requests 54 * are received. The two most notable transports are TCP and UDP; they are 55 * created and registered by routines in svc_tcp.c and svc_udp.c, respectively; 56 * they in turn call xprt_register and xprt_unregister. 57 * 58 * 2) An arbitrary number of locally registered services. Services are 59 * described by the following four data: program number, version number, 60 * "service dispatch" function, a transport handle, and a boolean that 61 * indicates whether or not the exported program should be registered with a 62 * local binder service; if true the program's number and version and the 63 * port number from the transport handle are registered with the binder. 64 * These data are registered with the rpc svc system via svc_register. 65 * 66 * A service's dispatch function is called whenever an rpc request comes in 67 * on a transport. The request's program and version numbers must match 68 * those of the registered service. The dispatch function is passed two 69 * parameters, struct svc_req * and SVCXPRT *, defined below. 70 */ 71 72 /* 73 * Service control requests 74 */ 75 #define SVCGET_VERSQUIET 1 76 #define SVCSET_VERSQUIET 2 77 #define SVCGET_CONNMAXREC 3 78 #define SVCSET_CONNMAXREC 4 79 80 /* 81 * Operations for rpc_control(). 82 */ 83 #define RPC_SVC_CONNMAXREC_SET 0 /* set max rec size, enable nonblock */ 84 #define RPC_SVC_CONNMAXREC_GET 1 85 86 enum xprt_stat { 87 XPRT_DIED, 88 XPRT_MOREREQS, 89 XPRT_IDLE 90 }; 91 92 struct __rpc_svcxprt; 93 struct mbuf; 94 95 struct xp_ops { 96 /* receive incoming requests */ 97 bool_t (*xp_recv)(struct __rpc_svcxprt *, struct rpc_msg *, 98 struct sockaddr **, struct mbuf **); 99 /* get transport status */ 100 enum xprt_stat (*xp_stat)(struct __rpc_svcxprt *); 101 /* get transport acknowledge sequence */ 102 bool_t (*xp_ack)(struct __rpc_svcxprt *, uint32_t *); 103 /* send reply */ 104 bool_t (*xp_reply)(struct __rpc_svcxprt *, struct rpc_msg *, 105 struct sockaddr *, struct mbuf *, uint32_t *); 106 /* destroy this struct */ 107 void (*xp_destroy)(struct __rpc_svcxprt *); 108 /* catch-all function */ 109 bool_t (*xp_control)(struct __rpc_svcxprt *, const u_int, void *); 110 }; 111 112 struct __rpc_svcpool; 113 struct __rpc_svcgroup; 114 struct __rpc_svcthread; 115 116 /* 117 * Server side transport handle. In the kernel, transports have a 118 * reference count which tracks the number of currently assigned 119 * worker threads plus one for the service pool's reference. 120 * For NFSv4.1 sessions, a reference is also held for a backchannel. 121 * xp_p2 - Points to the CLIENT structure for the RPC server end 122 * (the client end for callbacks). 123 * Points to the private structure (cl_private) for the 124 * CLIENT structure for the RPC client end (the server 125 * end for callbacks). 126 */ 127 typedef struct __rpc_svcxprt { 128 volatile u_int xp_refs; 129 struct sx xp_lock; 130 struct __rpc_svcpool *xp_pool; /* owning pool (see below) */ 131 struct __rpc_svcgroup *xp_group; /* owning group (see below) */ 132 TAILQ_ENTRY(__rpc_svcxprt) xp_link; 133 TAILQ_ENTRY(__rpc_svcxprt) xp_alink; 134 bool_t xp_registered; /* xprt_register has been called */ 135 bool_t xp_active; /* xprt_active has been called */ 136 struct __rpc_svcthread *xp_thread; /* assigned service thread */ 137 struct socket* xp_socket; 138 const struct xp_ops *xp_ops; 139 char *xp_netid; /* network token */ 140 struct sockaddr_storage xp_ltaddr; /* local transport address */ 141 struct sockaddr_storage xp_rtaddr; /* remote transport address */ 142 void *xp_p1; /* private: for use by svc ops */ 143 void *xp_p2; /* private: for use by svc ops */ 144 void *xp_p3; /* private: for use by svc lib */ 145 int xp_type; /* transport type */ 146 int xp_idletimeout; /* idle time before closing */ 147 time_t xp_lastactive; /* time of last RPC */ 148 uint64_t xp_sockref; /* set by nfsv4 to identify socket */ 149 int xp_upcallset; /* socket upcall is set up */ 150 uint32_t xp_snd_cnt; /* # of bytes to send to socket */ 151 uint32_t xp_snt_cnt; /* # of bytes sent to socket */ 152 bool_t xp_dontrcv; /* Do not receive on the socket */ 153 uint32_t xp_tls; /* RPC-over-TLS on socket */ 154 int xp_ngrps; /* Cred. from TLS cert. */ 155 uid_t xp_uid; 156 gid_t *xp_gidp; 157 int xp_doneddp; 158 } SVCXPRT; 159 160 /* 161 * Interface to server-side authentication flavors. 162 */ 163 typedef struct __rpc_svcauth { 164 const struct svc_auth_ops { 165 int (*svc_ah_wrap)(struct __rpc_svcauth *, struct mbuf **); 166 int (*svc_ah_unwrap)(struct __rpc_svcauth *, struct mbuf **); 167 void (*svc_ah_release)(struct __rpc_svcauth *); 168 } *svc_ah_ops; 169 void *svc_ah_private; 170 } SVCAUTH; 171 172 /* 173 * Server transport extensions (accessed via xp_p3). 174 */ 175 typedef struct __rpc_svcxprt_ext { 176 int xp_flags; /* versquiet */ 177 SVCAUTH xp_auth; /* interface to auth methods */ 178 } SVCXPRT_EXT; 179 180 /* 181 * The services list 182 * Each entry represents a set of procedures (an rpc program). 183 * The dispatch routine takes request structs and runs the 184 * appropriate procedure. 185 */ 186 struct svc_callout { 187 TAILQ_ENTRY(svc_callout) sc_link; 188 rpcprog_t sc_prog; 189 rpcvers_t sc_vers; 190 char *sc_netid; 191 void (*sc_dispatch)(struct svc_req *, SVCXPRT *); 192 }; 193 TAILQ_HEAD(svc_callout_list, svc_callout); 194 195 /* 196 * The services connection loss list 197 * The dispatch routine takes request structs and runs the 198 * appropriate procedure. 199 */ 200 struct svc_loss_callout { 201 TAILQ_ENTRY(svc_loss_callout) slc_link; 202 void (*slc_dispatch)(SVCXPRT *); 203 }; 204 TAILQ_HEAD(svc_loss_callout_list, svc_loss_callout); 205 206 /* 207 * Service request 208 */ 209 struct svc_req { 210 STAILQ_ENTRY(svc_req) rq_link; /* list of requests for a thread */ 211 struct __rpc_svcthread *rq_thread; /* thread which is to execute this */ 212 uint32_t rq_xid; /* RPC transaction ID */ 213 uint32_t rq_prog; /* service program number */ 214 uint32_t rq_vers; /* service protocol version */ 215 uint32_t rq_proc; /* the desired procedure */ 216 size_t rq_size; /* space used by request */ 217 struct mbuf *rq_args; /* XDR-encoded procedure arguments */ 218 struct opaque_auth rq_cred; /* raw creds from the wire */ 219 struct opaque_auth rq_verf; /* verifier for the reply */ 220 void *rq_clntcred; /* read only cooked cred */ 221 SVCAUTH rq_auth; /* interface to auth methods */ 222 SVCXPRT *rq_xprt; /* associated transport */ 223 struct sockaddr *rq_addr; /* reply address or NULL if connected */ 224 void *rq_p1; /* application workspace */ 225 int rq_p2; /* application workspace */ 226 uint64_t rq_p3; /* application workspace */ 227 uint32_t rq_reply_seq; /* reply socket sequence # */ 228 char rq_credarea[3*MAX_AUTH_BYTES]; 229 }; 230 STAILQ_HEAD(svc_reqlist, svc_req); 231 232 #define svc_getrpccaller(rq) \ 233 ((rq)->rq_addr ? (rq)->rq_addr : \ 234 (struct sockaddr *) &(rq)->rq_xprt->xp_rtaddr) 235 236 /* 237 * This structure is used to manage a thread which is executing 238 * requests from a service pool. A service thread is in one of three 239 * states: 240 * 241 * SVCTHREAD_SLEEPING waiting for a request to process 242 * SVCTHREAD_ACTIVE processing a request 243 * SVCTHREAD_EXITING exiting after finishing current request 244 * 245 * Threads which have no work to process sleep on the pool's sp_active 246 * list. When a transport becomes active, it is assigned a service 247 * thread to read and execute pending RPCs. 248 */ 249 typedef struct __rpc_svcthread { 250 struct mtx_padalign st_lock; /* protects st_reqs field */ 251 struct __rpc_svcpool *st_pool; 252 SVCXPRT *st_xprt; /* transport we are processing */ 253 struct svc_reqlist st_reqs; /* RPC requests to execute */ 254 struct cv st_cond; /* sleeping for work */ 255 LIST_ENTRY(__rpc_svcthread) st_ilink; /* idle threads list */ 256 LIST_ENTRY(__rpc_svcthread) st_alink; /* application thread list */ 257 int st_p2; /* application workspace */ 258 uint64_t st_p3; /* application workspace */ 259 } SVCTHREAD; 260 LIST_HEAD(svcthread_list, __rpc_svcthread); 261 262 /* 263 * A thread group contain all information needed to assign subset of 264 * transports to subset of threads. On systems with many CPUs and many 265 * threads that allows to reduce lock congestion and improve performance. 266 * Hundreds of threads on dozens of CPUs sharing the single pool lock do 267 * not scale well otherwise. 268 */ 269 TAILQ_HEAD(svcxprt_list, __rpc_svcxprt); 270 enum svcpool_state { 271 SVCPOOL_INIT, /* svc_run not called yet */ 272 SVCPOOL_ACTIVE, /* normal running state */ 273 SVCPOOL_THREADWANTED, /* new service thread requested */ 274 SVCPOOL_THREADSTARTING, /* new service thread started */ 275 SVCPOOL_CLOSING /* svc_exit called */ 276 }; 277 typedef struct __rpc_svcgroup { 278 struct mtx_padalign sg_lock; /* protect the thread/req lists */ 279 struct __rpc_svcpool *sg_pool; 280 enum svcpool_state sg_state; /* current pool state */ 281 struct svcxprt_list sg_xlist; /* all transports in the group */ 282 struct svcxprt_list sg_active; /* transports needing service */ 283 struct svcthread_list sg_idlethreads; /* idle service threads */ 284 285 int sg_minthreads; /* minimum service thread count */ 286 int sg_maxthreads; /* maximum service thread count */ 287 int sg_threadcount; /* current service thread count */ 288 time_t sg_lastcreatetime; /* when we last started a thread */ 289 time_t sg_lastidlecheck; /* when we last checked idle transports */ 290 } SVCGROUP; 291 292 /* 293 * In the kernel, we can't use global variables to store lists of 294 * transports etc. since otherwise we could not have two unrelated RPC 295 * services running, each on its own thread. We solve this by 296 * importing a tiny part of a Solaris kernel concept, SVCPOOL. 297 * 298 * A service pool contains a set of transports and service callbacks 299 * for a set of related RPC services. The pool handle should be passed 300 * when creating new transports etc. Future work may include extending 301 * this to support something similar to the Solaris multi-threaded RPC 302 * server. 303 */ 304 typedef SVCTHREAD *pool_assign_fn(SVCTHREAD *, struct svc_req *); 305 typedef void pool_done_fn(SVCTHREAD *, struct svc_req *); 306 #define SVC_MAXGROUPS 16 307 typedef struct __rpc_svcpool { 308 struct mtx_padalign sp_lock; /* protect the transport lists */ 309 const char *sp_name; /* pool name (e.g. "nfsd", "NLM" */ 310 enum svcpool_state sp_state; /* current pool state */ 311 struct proc *sp_proc; /* process which is in svc_run */ 312 struct svc_callout_list sp_callouts; /* (prog,vers)->dispatch list */ 313 struct svc_loss_callout_list sp_lcallouts; /* loss->dispatch list */ 314 int sp_minthreads; /* minimum service thread count */ 315 int sp_maxthreads; /* maximum service thread count */ 316 317 /* 318 * Hooks to allow an application to control request to thread 319 * placement. 320 */ 321 pool_assign_fn *sp_assign; 322 pool_done_fn *sp_done; 323 324 /* 325 * These variables are used to put an upper bound on the 326 * amount of memory used by RPC requests which are queued 327 * waiting for execution. 328 */ 329 unsigned long sp_space_low; 330 unsigned long sp_space_high; 331 unsigned long sp_space_used; 332 unsigned long sp_space_used_highest; 333 bool_t sp_space_throttled; 334 int sp_space_throttle_count; 335 336 struct replay_cache *sp_rcache; /* optional replay cache */ 337 struct sysctl_ctx_list sp_sysctl; 338 339 int sp_groupcount; /* Number of groups in the pool. */ 340 int sp_nextgroup; /* Next group to assign port. */ 341 SVCGROUP sp_groups[SVC_MAXGROUPS]; /* Thread/port groups. */ 342 } SVCPOOL; 343 344 /* 345 * Operations defined on an SVCXPRT handle 346 * 347 * SVCXPRT *xprt; 348 * struct rpc_msg *msg; 349 * xdrproc_t xargs; 350 * void * argsp; 351 */ 352 #define SVC_ACQUIRE(xprt) \ 353 refcount_acquire(&(xprt)->xp_refs) 354 355 #define SVC_RELEASE(xprt) \ 356 if (refcount_release(&(xprt)->xp_refs)) \ 357 SVC_DESTROY(xprt) 358 359 #define SVC_RECV(xprt, msg, addr, args) \ 360 (*(xprt)->xp_ops->xp_recv)((xprt), (msg), (addr), (args)) 361 362 #define SVC_STAT(xprt) \ 363 (*(xprt)->xp_ops->xp_stat)(xprt) 364 365 #define SVC_ACK(xprt, ack) \ 366 ((xprt)->xp_ops->xp_ack == NULL ? FALSE : \ 367 ((ack) == NULL ? TRUE : (*(xprt)->xp_ops->xp_ack)((xprt), (ack)))) 368 369 #define SVC_REPLY(xprt, msg, addr, m, seq) \ 370 (*(xprt)->xp_ops->xp_reply) ((xprt), (msg), (addr), (m), (seq)) 371 372 #define SVC_DESTROY(xprt) \ 373 (*(xprt)->xp_ops->xp_destroy)(xprt) 374 375 #define SVC_CONTROL(xprt, rq, in) \ 376 (*(xprt)->xp_ops->xp_control)((xprt), (rq), (in)) 377 378 #define SVC_EXT(xprt) \ 379 ((SVCXPRT_EXT *) xprt->xp_p3) 380 381 #define SVC_AUTH(xprt) \ 382 (SVC_EXT(xprt)->xp_auth) 383 384 /* 385 * Operations defined on an SVCAUTH handle 386 */ 387 #define SVCAUTH_WRAP(auth, mp) \ 388 ((auth)->svc_ah_ops->svc_ah_wrap(auth, mp)) 389 #define SVCAUTH_UNWRAP(auth, mp) \ 390 ((auth)->svc_ah_ops->svc_ah_unwrap(auth, mp)) 391 #define SVCAUTH_RELEASE(auth) \ 392 ((auth)->svc_ah_ops->svc_ah_release(auth)) 393 394 /* 395 * Service registration 396 * 397 * svc_reg(xprt, prog, vers, dispatch, nconf) 398 * const SVCXPRT *xprt; 399 * const rpcprog_t prog; 400 * const rpcvers_t vers; 401 * const void (*dispatch)(); 402 * const struct netconfig *nconf; 403 */ 404 405 __BEGIN_DECLS 406 extern bool_t svc_reg(SVCXPRT *, const rpcprog_t, const rpcvers_t, 407 void (*)(struct svc_req *, SVCXPRT *), 408 const struct netconfig *); 409 __END_DECLS 410 411 /* 412 * Service un-registration 413 * 414 * svc_unreg(prog, vers) 415 * const rpcprog_t prog; 416 * const rpcvers_t vers; 417 */ 418 419 __BEGIN_DECLS 420 extern void svc_unreg(SVCPOOL *, const rpcprog_t, const rpcvers_t); 421 __END_DECLS 422 423 /* 424 * Service connection loss registration 425 * 426 * svc_loss_reg(xprt, dispatch) 427 * const SVCXPRT *xprt; 428 * const void (*dispatch)(); 429 */ 430 431 __BEGIN_DECLS 432 extern bool_t svc_loss_reg(SVCXPRT *, void (*)(SVCXPRT *)); 433 __END_DECLS 434 435 /* 436 * Service connection loss un-registration 437 * 438 * svc_loss_unreg(xprt, dispatch) 439 * const SVCXPRT *xprt; 440 * const void (*dispatch)(); 441 */ 442 443 __BEGIN_DECLS 444 extern void svc_loss_unreg(SVCPOOL *, void (*)(SVCXPRT *)); 445 __END_DECLS 446 447 /* 448 * Transport registration. 449 * 450 * xprt_register(xprt) 451 * SVCXPRT *xprt; 452 */ 453 __BEGIN_DECLS 454 extern void xprt_register(SVCXPRT *); 455 __END_DECLS 456 457 /* 458 * Transport un-register 459 * 460 * xprt_unregister(xprt) 461 * SVCXPRT *xprt; 462 */ 463 __BEGIN_DECLS 464 extern void xprt_unregister(SVCXPRT *); 465 extern void __xprt_unregister_unlocked(SVCXPRT *); 466 __END_DECLS 467 468 /* 469 * Called when a transport has pending requests. 470 */ 471 __BEGIN_DECLS 472 extern void xprt_active(SVCXPRT *); 473 extern void xprt_inactive(SVCXPRT *); 474 extern void xprt_inactive_locked(SVCXPRT *); 475 extern void xprt_inactive_self(SVCXPRT *); 476 __END_DECLS 477 478 /* 479 * When the service routine is called, it must first check to see if it 480 * knows about the procedure; if not, it should call svcerr_noproc 481 * and return. If so, it should deserialize its arguments via 482 * SVC_GETARGS (defined above). If the deserialization does not work, 483 * svcerr_decode should be called followed by a return. Successful 484 * decoding of the arguments should be followed the execution of the 485 * procedure's code and a call to svc_sendreply. 486 * 487 * Also, if the service refuses to execute the procedure due to too- 488 * weak authentication parameters, svcerr_weakauth should be called. 489 * Note: do not confuse access-control failure with weak authentication! 490 * 491 * NB: In pure implementations of rpc, the caller always waits for a reply 492 * msg. This message is sent when svc_sendreply is called. 493 * Therefore pure service implementations should always call 494 * svc_sendreply even if the function logically returns void; use 495 * xdr.h - xdr_void for the xdr routine. HOWEVER, tcp based rpc allows 496 * for the abuse of pure rpc via batched calling or pipelining. In the 497 * case of a batched call, svc_sendreply should NOT be called since 498 * this would send a return message, which is what batching tries to avoid. 499 * It is the service/protocol writer's responsibility to know which calls are 500 * batched and which are not. Warning: responding to batch calls may 501 * deadlock the caller and server processes! 502 */ 503 504 __BEGIN_DECLS 505 extern bool_t svc_sendreply(struct svc_req *, xdrproc_t, void *); 506 extern bool_t svc_sendreply_mbuf(struct svc_req *, struct mbuf *); 507 extern void svcerr_decode(struct svc_req *); 508 extern void svcerr_weakauth(struct svc_req *); 509 extern void svcerr_noproc(struct svc_req *); 510 extern void svcerr_progvers(struct svc_req *, rpcvers_t, rpcvers_t); 511 extern void svcerr_auth(struct svc_req *, enum auth_stat); 512 extern void svcerr_noprog(struct svc_req *); 513 extern void svcerr_systemerr(struct svc_req *); 514 extern int rpc_reg(rpcprog_t, rpcvers_t, rpcproc_t, 515 char *(*)(char *), xdrproc_t, xdrproc_t, 516 char *); 517 __END_DECLS 518 519 /* 520 * Lowest level dispatching -OR- who owns this process anyway. 521 * Somebody has to wait for incoming requests and then call the correct 522 * service routine. The routine svc_run does infinite waiting; i.e., 523 * svc_run never returns. 524 * Since another (co-existent) package may wish to selectively wait for 525 * incoming calls or other events outside of the rpc architecture, the 526 * routine svc_getreq is provided. It must be passed readfds, the 527 * "in-place" results of a select system call (see select, section 2). 528 */ 529 530 /* 531 * a small program implemented by the svc_rpc implementation itself; 532 * also see clnt.h for protocol numbers. 533 */ 534 __BEGIN_DECLS 535 extern void rpctest_service(void); 536 __END_DECLS 537 538 __BEGIN_DECLS 539 extern SVCXPRT *svc_xprt_alloc(void); 540 extern void svc_xprt_free(SVCXPRT *); 541 extern void svc_run(SVCPOOL *); 542 extern void svc_exit(SVCPOOL *); 543 extern bool_t svc_getargs(struct svc_req *, xdrproc_t, void *); 544 extern bool_t svc_freeargs(struct svc_req *, xdrproc_t, void *); 545 extern void svc_freereq(struct svc_req *); 546 __END_DECLS 547 548 /* 549 * Socket to use on svcxxx_create call to get default socket 550 */ 551 #define RPC_ANYSOCK -1 552 #define RPC_ANYFD RPC_ANYSOCK 553 554 /* 555 * These are the existing service side transport implementations 556 */ 557 558 __BEGIN_DECLS 559 560 /* 561 * Create a new service pool. 562 */ 563 extern SVCPOOL* svcpool_create(const char *name, 564 struct sysctl_oid_list *sysctl_base); 565 566 /* 567 * Destroy a service pool, including all registered transports. 568 */ 569 extern void svcpool_destroy(SVCPOOL *pool); 570 571 /* 572 * Close a service pool. Similar to svcpool_destroy(), but it does not 573 * free the data structures. As such, the pool can be used again. 574 */ 575 extern void svcpool_close(SVCPOOL *pool); 576 577 /* 578 * Generic server creation routine. It takes a netconfig structure 579 * instead of a nettype. 580 */ 581 582 extern SVCXPRT *svc_tp_create(SVCPOOL *, void (*)(struct svc_req *, SVCXPRT *), 583 const rpcprog_t, const rpcvers_t, const char *uaddr, 584 const struct netconfig *); 585 /* 586 * void (*dispatch)(); -- dispatch routine 587 * const rpcprog_t prognum; -- program number 588 * const rpcvers_t versnum; -- version number 589 * const char *uaddr; -- universal address of service 590 * const struct netconfig *nconf; -- netconfig structure 591 */ 592 593 extern SVCXPRT *svc_dg_create(SVCPOOL *, struct socket *, 594 const size_t, const size_t); 595 /* 596 * struct socket *; -- open connection 597 * const size_t sendsize; -- max send size 598 * const size_t recvsize; -- max recv size 599 */ 600 601 extern SVCXPRT *svc_vc_create(SVCPOOL *, struct socket *, 602 const size_t, const size_t); 603 /* 604 * struct socket *; -- open connection 605 * const size_t sendsize; -- max send size 606 * const size_t recvsize; -- max recv size 607 */ 608 609 extern SVCXPRT *svc_vc_create_backchannel(SVCPOOL *); 610 611 extern void *clnt_bck_create(struct socket *, const rpcprog_t, const rpcvers_t); 612 /* 613 * struct socket *; -- server transport socket 614 * const rpcprog_t prog; -- RPC program number 615 * const rpcvers_t vers; -- RPC program version 616 */ 617 618 /* 619 * Generic TLI create routine 620 */ 621 extern SVCXPRT *svc_tli_create(SVCPOOL *, const struct netconfig *, 622 const struct t_bind *, const size_t, const size_t); 623 /* 624 * const struct netconfig *nconf; -- netconfig structure for network 625 * const struct t_bind *bindaddr; -- local bind address 626 * const size_t sendsz; -- max sendsize 627 * const size_t recvsz; -- max recvsize 628 */ 629 __END_DECLS 630 631 #endif /* !_RPC_SVC_H */ 632