1 /* $NetBSD: svc.h,v 1.17 2000/06/02 22:57:56 fvdl 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 * from: @(#)svc.h 1.35 88/12/17 SMI 31 * from: @(#)svc.h 1.27 94/04/25 SMI 32 * $FreeBSD$ 33 */ 34 35 /* 36 * svc.h, Server-side remote procedure call interface. 37 * 38 * Copyright (C) 1986-1993 by Sun Microsystems, Inc. 39 */ 40 41 #ifndef _RPC_SVC_H 42 #define _RPC_SVC_H 43 #include <sys/cdefs.h> 44 45 #ifdef _KERNEL 46 #include <sys/queue.h> 47 #include <sys/_lock.h> 48 #include <sys/_mutex.h> 49 #include <sys/_sx.h> 50 #include <sys/condvar.h> 51 #include <sys/sysctl.h> 52 #endif 53 54 /* 55 * This interface must manage two items concerning remote procedure calling: 56 * 57 * 1) An arbitrary number of transport connections upon which rpc requests 58 * are received. The two most notable transports are TCP and UDP; they are 59 * created and registered by routines in svc_tcp.c and svc_udp.c, respectively; 60 * they in turn call xprt_register and xprt_unregister. 61 * 62 * 2) An arbitrary number of locally registered services. Services are 63 * described by the following four data: program number, version number, 64 * "service dispatch" function, a transport handle, and a boolean that 65 * indicates whether or not the exported program should be registered with a 66 * local binder service; if true the program's number and version and the 67 * port number from the transport handle are registered with the binder. 68 * These data are registered with the rpc svc system via svc_register. 69 * 70 * A service's dispatch function is called whenever an rpc request comes in 71 * on a transport. The request's program and version numbers must match 72 * those of the registered service. The dispatch function is passed two 73 * parameters, struct svc_req * and SVCXPRT *, defined below. 74 */ 75 76 /* 77 * Service control requests 78 */ 79 #define SVCGET_VERSQUIET 1 80 #define SVCSET_VERSQUIET 2 81 #define SVCGET_CONNMAXREC 3 82 #define SVCSET_CONNMAXREC 4 83 84 /* 85 * Operations for rpc_control(). 86 */ 87 #define RPC_SVC_CONNMAXREC_SET 0 /* set max rec size, enable nonblock */ 88 #define RPC_SVC_CONNMAXREC_GET 1 89 90 enum xprt_stat { 91 XPRT_DIED, 92 XPRT_MOREREQS, 93 XPRT_IDLE 94 }; 95 96 struct __rpc_svcxprt; 97 struct mbuf; 98 99 struct xp_ops { 100 #ifdef _KERNEL 101 /* receive incoming requests */ 102 bool_t (*xp_recv)(struct __rpc_svcxprt *, struct rpc_msg *, 103 struct sockaddr **, struct mbuf **); 104 /* get transport status */ 105 enum xprt_stat (*xp_stat)(struct __rpc_svcxprt *); 106 /* get transport acknowledge sequence */ 107 bool_t (*xp_ack)(struct __rpc_svcxprt *, uint32_t *); 108 /* send reply */ 109 bool_t (*xp_reply)(struct __rpc_svcxprt *, struct rpc_msg *, 110 struct sockaddr *, struct mbuf *, uint32_t *); 111 /* destroy this struct */ 112 void (*xp_destroy)(struct __rpc_svcxprt *); 113 /* catch-all function */ 114 bool_t (*xp_control)(struct __rpc_svcxprt *, const u_int, void *); 115 #else 116 /* receive incoming requests */ 117 bool_t (*xp_recv)(struct __rpc_svcxprt *, struct rpc_msg *); 118 /* get transport status */ 119 enum xprt_stat (*xp_stat)(struct __rpc_svcxprt *); 120 /* get arguments */ 121 bool_t (*xp_getargs)(struct __rpc_svcxprt *, xdrproc_t, void *); 122 /* send reply */ 123 bool_t (*xp_reply)(struct __rpc_svcxprt *, struct rpc_msg *); 124 /* free mem allocated for args */ 125 bool_t (*xp_freeargs)(struct __rpc_svcxprt *, xdrproc_t, void *); 126 /* destroy this struct */ 127 void (*xp_destroy)(struct __rpc_svcxprt *); 128 #endif 129 }; 130 131 #ifndef _KERNEL 132 struct xp_ops2 { 133 /* catch-all function */ 134 bool_t (*xp_control)(struct __rpc_svcxprt *, const u_int, void *); 135 }; 136 #endif 137 138 #ifdef _KERNEL 139 struct __rpc_svcpool; 140 struct __rpc_svcthread; 141 #endif 142 143 /* 144 * Server side transport handle. In the kernel, transports have a 145 * reference count which tracks the number of currently assigned 146 * worker threads plus one for the service pool's reference. 147 */ 148 typedef struct __rpc_svcxprt { 149 #ifdef _KERNEL 150 volatile u_int xp_refs; 151 struct sx xp_lock; 152 struct __rpc_svcpool *xp_pool; /* owning pool (see below) */ 153 TAILQ_ENTRY(__rpc_svcxprt) xp_link; 154 TAILQ_ENTRY(__rpc_svcxprt) xp_alink; 155 bool_t xp_registered; /* xprt_register has been called */ 156 bool_t xp_active; /* xprt_active has been called */ 157 struct __rpc_svcthread *xp_thread; /* assigned service thread */ 158 struct socket* xp_socket; 159 const struct xp_ops *xp_ops; 160 char *xp_netid; /* network token */ 161 struct sockaddr_storage xp_ltaddr; /* local transport address */ 162 struct sockaddr_storage xp_rtaddr; /* remote transport address */ 163 void *xp_p1; /* private: for use by svc ops */ 164 void *xp_p2; /* private: for use by svc ops */ 165 void *xp_p3; /* private: for use by svc lib */ 166 int xp_type; /* transport type */ 167 int xp_idletimeout; /* idle time before closing */ 168 time_t xp_lastactive; /* time of last RPC */ 169 u_int64_t xp_sockref; /* set by nfsv4 to identify socket */ 170 int xp_upcallset; /* socket upcall is set up */ 171 uint32_t xp_snd_cnt; /* # of bytes to send to socket */ 172 uint32_t xp_snt_cnt; /* # of bytes sent to socket */ 173 #else 174 int xp_fd; 175 u_short xp_port; /* associated port number */ 176 const struct xp_ops *xp_ops; 177 int xp_addrlen; /* length of remote address */ 178 struct sockaddr_in xp_raddr; /* remote addr. (backward ABI compat) */ 179 /* XXX - fvdl stick this here for ABI backward compat reasons */ 180 const struct xp_ops2 *xp_ops2; 181 char *xp_tp; /* transport provider device name */ 182 char *xp_netid; /* network token */ 183 struct netbuf xp_ltaddr; /* local transport address */ 184 struct netbuf xp_rtaddr; /* remote transport address */ 185 struct opaque_auth xp_verf; /* raw response verifier */ 186 void *xp_p1; /* private: for use by svc ops */ 187 void *xp_p2; /* private: for use by svc ops */ 188 void *xp_p3; /* private: for use by svc lib */ 189 int xp_type; /* transport type */ 190 #endif 191 } SVCXPRT; 192 193 /* 194 * Interface to server-side authentication flavors. 195 */ 196 typedef struct __rpc_svcauth { 197 struct svc_auth_ops { 198 #ifdef _KERNEL 199 int (*svc_ah_wrap)(struct __rpc_svcauth *, struct mbuf **); 200 int (*svc_ah_unwrap)(struct __rpc_svcauth *, struct mbuf **); 201 void (*svc_ah_release)(struct __rpc_svcauth *); 202 #else 203 int (*svc_ah_wrap)(struct __rpc_svcauth *, XDR *, 204 xdrproc_t, caddr_t); 205 int (*svc_ah_unwrap)(struct __rpc_svcauth *, XDR *, 206 xdrproc_t, caddr_t); 207 #endif 208 } *svc_ah_ops; 209 void *svc_ah_private; 210 } SVCAUTH; 211 212 /* 213 * Server transport extensions (accessed via xp_p3). 214 */ 215 typedef struct __rpc_svcxprt_ext { 216 int xp_flags; /* versquiet */ 217 SVCAUTH xp_auth; /* interface to auth methods */ 218 } SVCXPRT_EXT; 219 220 #ifdef _KERNEL 221 222 /* 223 * The services list 224 * Each entry represents a set of procedures (an rpc program). 225 * The dispatch routine takes request structs and runs the 226 * apropriate procedure. 227 */ 228 struct svc_callout { 229 TAILQ_ENTRY(svc_callout) sc_link; 230 rpcprog_t sc_prog; 231 rpcvers_t sc_vers; 232 char *sc_netid; 233 void (*sc_dispatch)(struct svc_req *, SVCXPRT *); 234 }; 235 TAILQ_HEAD(svc_callout_list, svc_callout); 236 237 /* 238 * The services connection loss list 239 * The dispatch routine takes request structs and runs the 240 * apropriate procedure. 241 */ 242 struct svc_loss_callout { 243 TAILQ_ENTRY(svc_loss_callout) slc_link; 244 void (*slc_dispatch)(SVCXPRT *); 245 }; 246 TAILQ_HEAD(svc_loss_callout_list, svc_loss_callout); 247 248 struct __rpc_svcthread; 249 250 /* 251 * Service request 252 */ 253 struct svc_req { 254 STAILQ_ENTRY(svc_req) rq_link; /* list of requests for a thread */ 255 struct __rpc_svcthread *rq_thread; /* thread which is to execute this */ 256 uint32_t rq_xid; /* RPC transaction ID */ 257 uint32_t rq_prog; /* service program number */ 258 uint32_t rq_vers; /* service protocol version */ 259 uint32_t rq_proc; /* the desired procedure */ 260 size_t rq_size; /* space used by request */ 261 struct mbuf *rq_args; /* XDR-encoded procedure arguments */ 262 struct opaque_auth rq_cred; /* raw creds from the wire */ 263 struct opaque_auth rq_verf; /* verifier for the reply */ 264 void *rq_clntcred; /* read only cooked cred */ 265 SVCAUTH rq_auth; /* interface to auth methods */ 266 SVCXPRT *rq_xprt; /* associated transport */ 267 struct sockaddr *rq_addr; /* reply address or NULL if connected */ 268 void *rq_p1; /* application workspace */ 269 int rq_p2; /* application workspace */ 270 uint64_t rq_p3; /* application workspace */ 271 uint32_t rq_reply_seq; /* reply socket sequence # */ 272 char rq_credarea[3*MAX_AUTH_BYTES]; 273 }; 274 STAILQ_HEAD(svc_reqlist, svc_req); 275 276 #define svc_getrpccaller(rq) \ 277 ((rq)->rq_addr ? (rq)->rq_addr : \ 278 (struct sockaddr *) &(rq)->rq_xprt->xp_rtaddr) 279 280 /* 281 * This structure is used to manage a thread which is executing 282 * requests from a service pool. A service thread is in one of three 283 * states: 284 * 285 * SVCTHREAD_SLEEPING waiting for a request to process 286 * SVCTHREAD_ACTIVE processing a request 287 * SVCTHREAD_EXITING exiting after finishing current request 288 * 289 * Threads which have no work to process sleep on the pool's sp_active 290 * list. When a transport becomes active, it is assigned a service 291 * thread to read and execute pending RPCs. 292 */ 293 typedef struct __rpc_svcthread { 294 struct __rpc_svcpool *st_pool; 295 SVCXPRT *st_xprt; /* transport we are processing */ 296 struct svc_reqlist st_reqs; /* RPC requests to execute */ 297 int st_idle; /* thread is on idle list */ 298 struct cv st_cond; /* sleeping for work */ 299 LIST_ENTRY(__rpc_svcthread) st_link; /* all threads list */ 300 LIST_ENTRY(__rpc_svcthread) st_ilink; /* idle threads list */ 301 LIST_ENTRY(__rpc_svcthread) st_alink; /* application thread list */ 302 int st_p2; /* application workspace */ 303 uint64_t st_p3; /* application workspace */ 304 } SVCTHREAD; 305 LIST_HEAD(svcthread_list, __rpc_svcthread); 306 307 /* 308 * In the kernel, we can't use global variables to store lists of 309 * transports etc. since otherwise we could not have two unrelated RPC 310 * services running, each on its own thread. We solve this by 311 * importing a tiny part of a Solaris kernel concept, SVCPOOL. 312 * 313 * A service pool contains a set of transports and service callbacks 314 * for a set of related RPC services. The pool handle should be passed 315 * when creating new transports etc. Future work may include extending 316 * this to support something similar to the Solaris multi-threaded RPC 317 * server. 318 */ 319 TAILQ_HEAD(svcxprt_list, __rpc_svcxprt); 320 enum svcpool_state { 321 SVCPOOL_INIT, /* svc_run not called yet */ 322 SVCPOOL_ACTIVE, /* normal running state */ 323 SVCPOOL_THREADWANTED, /* new service thread requested */ 324 SVCPOOL_THREADSTARTING, /* new service thread started */ 325 SVCPOOL_CLOSING /* svc_exit called */ 326 }; 327 typedef SVCTHREAD *pool_assign_fn(SVCTHREAD *, struct svc_req *); 328 typedef void pool_done_fn(SVCTHREAD *, struct svc_req *); 329 typedef struct __rpc_svcpool { 330 struct mtx_padalign sp_lock; /* protect the transport lists */ 331 const char *sp_name; /* pool name (e.g. "nfsd", "NLM" */ 332 enum svcpool_state sp_state; /* current pool state */ 333 struct proc *sp_proc; /* process which is in svc_run */ 334 struct svcxprt_list sp_xlist; /* all transports in the pool */ 335 struct svcxprt_list sp_active; /* transports needing service */ 336 struct svc_callout_list sp_callouts; /* (prog,vers)->dispatch list */ 337 struct svc_loss_callout_list sp_lcallouts; /* loss->dispatch list */ 338 struct svcthread_list sp_threads; /* service threads */ 339 struct svcthread_list sp_idlethreads; /* idle service threads */ 340 int sp_minthreads; /* minimum service thread count */ 341 int sp_maxthreads; /* maximum service thread count */ 342 int sp_threadcount; /* current service thread count */ 343 time_t sp_lastcreatetime; /* when we last started a thread */ 344 time_t sp_lastidlecheck; /* when we last checked idle transports */ 345 346 /* 347 * Hooks to allow an application to control request to thread 348 * placement. 349 */ 350 pool_assign_fn *sp_assign; 351 pool_done_fn *sp_done; 352 353 /* 354 * These variables are used to put an upper bound on the 355 * amount of memory used by RPC requests which are queued 356 * waiting for execution. 357 */ 358 unsigned int sp_space_low; 359 unsigned int sp_space_high; 360 unsigned int sp_space_used; 361 unsigned int sp_space_used_highest; 362 bool_t sp_space_throttled; 363 int sp_space_throttle_count; 364 365 struct replay_cache *sp_rcache; /* optional replay cache */ 366 struct sysctl_ctx_list sp_sysctl; 367 } SVCPOOL; 368 369 #else 370 371 /* 372 * Service request 373 */ 374 struct svc_req { 375 uint32_t rq_prog; /* service program number */ 376 uint32_t rq_vers; /* service protocol version */ 377 uint32_t rq_proc; /* the desired procedure */ 378 struct opaque_auth rq_cred; /* raw creds from the wire */ 379 void *rq_clntcred; /* read only cooked cred */ 380 SVCXPRT *rq_xprt; /* associated transport */ 381 }; 382 383 /* 384 * Approved way of getting address of caller 385 */ 386 #define svc_getrpccaller(x) (&(x)->xp_rtaddr) 387 388 #endif 389 390 /* 391 * Operations defined on an SVCXPRT handle 392 * 393 * SVCXPRT *xprt; 394 * struct rpc_msg *msg; 395 * xdrproc_t xargs; 396 * void * argsp; 397 */ 398 #ifdef _KERNEL 399 400 #define SVC_ACQUIRE(xprt) \ 401 refcount_acquire(&(xprt)->xp_refs) 402 403 #define SVC_RELEASE(xprt) \ 404 if (refcount_release(&(xprt)->xp_refs)) \ 405 SVC_DESTROY(xprt) 406 407 #define SVC_RECV(xprt, msg, addr, args) \ 408 (*(xprt)->xp_ops->xp_recv)((xprt), (msg), (addr), (args)) 409 410 #define SVC_STAT(xprt) \ 411 (*(xprt)->xp_ops->xp_stat)(xprt) 412 413 #define SVC_ACK(xprt, ack) \ 414 ((xprt)->xp_ops->xp_stat == NULL ? FALSE : \ 415 ((ack) == NULL ? TRUE : (*(xprt)->xp_ops->xp_ack)((xprt), (ack)))) 416 417 #define SVC_REPLY(xprt, msg, addr, m, seq) \ 418 (*(xprt)->xp_ops->xp_reply) ((xprt), (msg), (addr), (m), (seq)) 419 420 #define SVC_DESTROY(xprt) \ 421 (*(xprt)->xp_ops->xp_destroy)(xprt) 422 423 #define SVC_CONTROL(xprt, rq, in) \ 424 (*(xprt)->xp_ops->xp_control)((xprt), (rq), (in)) 425 426 #else 427 428 #define SVC_RECV(xprt, msg) \ 429 (*(xprt)->xp_ops->xp_recv)((xprt), (msg)) 430 #define svc_recv(xprt, msg) \ 431 (*(xprt)->xp_ops->xp_recv)((xprt), (msg)) 432 433 #define SVC_STAT(xprt) \ 434 (*(xprt)->xp_ops->xp_stat)(xprt) 435 #define svc_stat(xprt) \ 436 (*(xprt)->xp_ops->xp_stat)(xprt) 437 438 #define SVC_GETARGS(xprt, xargs, argsp) \ 439 (*(xprt)->xp_ops->xp_getargs)((xprt), (xargs), (argsp)) 440 #define svc_getargs(xprt, xargs, argsp) \ 441 (*(xprt)->xp_ops->xp_getargs)((xprt), (xargs), (argsp)) 442 443 #define SVC_REPLY(xprt, msg) \ 444 (*(xprt)->xp_ops->xp_reply) ((xprt), (msg)) 445 #define svc_reply(xprt, msg) \ 446 (*(xprt)->xp_ops->xp_reply) ((xprt), (msg)) 447 448 #define SVC_FREEARGS(xprt, xargs, argsp) \ 449 (*(xprt)->xp_ops->xp_freeargs)((xprt), (xargs), (argsp)) 450 #define svc_freeargs(xprt, xargs, argsp) \ 451 (*(xprt)->xp_ops->xp_freeargs)((xprt), (xargs), (argsp)) 452 453 #define SVC_DESTROY(xprt) \ 454 (*(xprt)->xp_ops->xp_destroy)(xprt) 455 #define svc_destroy(xprt) \ 456 (*(xprt)->xp_ops->xp_destroy)(xprt) 457 458 #define SVC_CONTROL(xprt, rq, in) \ 459 (*(xprt)->xp_ops2->xp_control)((xprt), (rq), (in)) 460 461 #endif 462 463 #define SVC_EXT(xprt) \ 464 ((SVCXPRT_EXT *) xprt->xp_p3) 465 466 #define SVC_AUTH(xprt) \ 467 (SVC_EXT(xprt)->xp_auth) 468 469 /* 470 * Operations defined on an SVCAUTH handle 471 */ 472 #ifdef _KERNEL 473 #define SVCAUTH_WRAP(auth, mp) \ 474 ((auth)->svc_ah_ops->svc_ah_wrap(auth, mp)) 475 #define SVCAUTH_UNWRAP(auth, mp) \ 476 ((auth)->svc_ah_ops->svc_ah_unwrap(auth, mp)) 477 #define SVCAUTH_RELEASE(auth) \ 478 ((auth)->svc_ah_ops->svc_ah_release(auth)) 479 #else 480 #define SVCAUTH_WRAP(auth, xdrs, xfunc, xwhere) \ 481 ((auth)->svc_ah_ops->svc_ah_wrap(auth, xdrs, xfunc, xwhere)) 482 #define SVCAUTH_UNWRAP(auth, xdrs, xfunc, xwhere) \ 483 ((auth)->svc_ah_ops->svc_ah_unwrap(auth, xdrs, xfunc, xwhere)) 484 #endif 485 486 /* 487 * Service registration 488 * 489 * svc_reg(xprt, prog, vers, dispatch, nconf) 490 * const SVCXPRT *xprt; 491 * const rpcprog_t prog; 492 * const rpcvers_t vers; 493 * const void (*dispatch)(); 494 * const struct netconfig *nconf; 495 */ 496 497 __BEGIN_DECLS 498 extern bool_t svc_reg(SVCXPRT *, const rpcprog_t, const rpcvers_t, 499 void (*)(struct svc_req *, SVCXPRT *), 500 const struct netconfig *); 501 __END_DECLS 502 503 /* 504 * Service un-registration 505 * 506 * svc_unreg(prog, vers) 507 * const rpcprog_t prog; 508 * const rpcvers_t vers; 509 */ 510 511 __BEGIN_DECLS 512 #ifdef _KERNEL 513 extern void svc_unreg(SVCPOOL *, const rpcprog_t, const rpcvers_t); 514 #else 515 extern void svc_unreg(const rpcprog_t, const rpcvers_t); 516 #endif 517 __END_DECLS 518 519 /* 520 * Service connection loss registration 521 * 522 * svc_loss_reg(xprt, dispatch) 523 * const SVCXPRT *xprt; 524 * const void (*dispatch)(); 525 */ 526 527 __BEGIN_DECLS 528 extern bool_t svc_loss_reg(SVCXPRT *, void (*)(SVCXPRT *)); 529 __END_DECLS 530 531 /* 532 * Service connection loss un-registration 533 * 534 * svc_loss_unreg(xprt, dispatch) 535 * const SVCXPRT *xprt; 536 * const void (*dispatch)(); 537 */ 538 539 __BEGIN_DECLS 540 extern void svc_loss_unreg(SVCPOOL *, void (*)(SVCXPRT *)); 541 __END_DECLS 542 543 /* 544 * Transport registration. 545 * 546 * xprt_register(xprt) 547 * SVCXPRT *xprt; 548 */ 549 __BEGIN_DECLS 550 extern void xprt_register(SVCXPRT *); 551 __END_DECLS 552 553 /* 554 * Transport un-register 555 * 556 * xprt_unregister(xprt) 557 * SVCXPRT *xprt; 558 */ 559 __BEGIN_DECLS 560 extern void xprt_unregister(SVCXPRT *); 561 extern void __xprt_unregister_unlocked(SVCXPRT *); 562 __END_DECLS 563 564 #ifdef _KERNEL 565 566 /* 567 * Called when a transport has pending requests. 568 */ 569 __BEGIN_DECLS 570 extern void xprt_active(SVCXPRT *); 571 extern void xprt_inactive(SVCXPRT *); 572 extern void xprt_inactive_locked(SVCXPRT *); 573 extern void xprt_inactive_self(SVCXPRT *); 574 __END_DECLS 575 576 #endif 577 578 /* 579 * When the service routine is called, it must first check to see if it 580 * knows about the procedure; if not, it should call svcerr_noproc 581 * and return. If so, it should deserialize its arguments via 582 * SVC_GETARGS (defined above). If the deserialization does not work, 583 * svcerr_decode should be called followed by a return. Successful 584 * decoding of the arguments should be followed the execution of the 585 * procedure's code and a call to svc_sendreply. 586 * 587 * Also, if the service refuses to execute the procedure due to too- 588 * weak authentication parameters, svcerr_weakauth should be called. 589 * Note: do not confuse access-control failure with weak authentication! 590 * 591 * NB: In pure implementations of rpc, the caller always waits for a reply 592 * msg. This message is sent when svc_sendreply is called. 593 * Therefore pure service implementations should always call 594 * svc_sendreply even if the function logically returns void; use 595 * xdr.h - xdr_void for the xdr routine. HOWEVER, tcp based rpc allows 596 * for the abuse of pure rpc via batched calling or pipelining. In the 597 * case of a batched call, svc_sendreply should NOT be called since 598 * this would send a return message, which is what batching tries to avoid. 599 * It is the service/protocol writer's responsibility to know which calls are 600 * batched and which are not. Warning: responding to batch calls may 601 * deadlock the caller and server processes! 602 */ 603 604 __BEGIN_DECLS 605 #ifdef _KERNEL 606 extern bool_t svc_sendreply(struct svc_req *, xdrproc_t, void *); 607 extern bool_t svc_sendreply_mbuf(struct svc_req *, struct mbuf *); 608 extern void svcerr_decode(struct svc_req *); 609 extern void svcerr_weakauth(struct svc_req *); 610 extern void svcerr_noproc(struct svc_req *); 611 extern void svcerr_progvers(struct svc_req *, rpcvers_t, rpcvers_t); 612 extern void svcerr_auth(struct svc_req *, enum auth_stat); 613 extern void svcerr_noprog(struct svc_req *); 614 extern void svcerr_systemerr(struct svc_req *); 615 #else 616 extern bool_t svc_sendreply(SVCXPRT *, xdrproc_t, void *); 617 extern void svcerr_decode(SVCXPRT *); 618 extern void svcerr_weakauth(SVCXPRT *); 619 extern void svcerr_noproc(SVCXPRT *); 620 extern void svcerr_progvers(SVCXPRT *, rpcvers_t, rpcvers_t); 621 extern void svcerr_auth(SVCXPRT *, enum auth_stat); 622 extern void svcerr_noprog(SVCXPRT *); 623 extern void svcerr_systemerr(SVCXPRT *); 624 #endif 625 extern int rpc_reg(rpcprog_t, rpcvers_t, rpcproc_t, 626 char *(*)(char *), xdrproc_t, xdrproc_t, 627 char *); 628 __END_DECLS 629 630 /* 631 * Lowest level dispatching -OR- who owns this process anyway. 632 * Somebody has to wait for incoming requests and then call the correct 633 * service routine. The routine svc_run does infinite waiting; i.e., 634 * svc_run never returns. 635 * Since another (co-existant) package may wish to selectively wait for 636 * incoming calls or other events outside of the rpc architecture, the 637 * routine svc_getreq is provided. It must be passed readfds, the 638 * "in-place" results of a select system call (see select, section 2). 639 */ 640 641 #ifndef _KERNEL 642 /* 643 * Global keeper of rpc service descriptors in use 644 * dynamic; must be inspected before each call to select 645 */ 646 extern int svc_maxfd; 647 #ifdef FD_SETSIZE 648 extern fd_set svc_fdset; 649 #define svc_fds svc_fdset.fds_bits[0] /* compatibility */ 650 #else 651 extern int svc_fds; 652 #endif /* def FD_SETSIZE */ 653 #endif 654 655 /* 656 * a small program implemented by the svc_rpc implementation itself; 657 * also see clnt.h for protocol numbers. 658 */ 659 __BEGIN_DECLS 660 extern void rpctest_service(void); 661 __END_DECLS 662 663 __BEGIN_DECLS 664 extern SVCXPRT *svc_xprt_alloc(void); 665 extern void svc_xprt_free(SVCXPRT *); 666 #ifndef _KERNEL 667 extern void svc_getreq(int); 668 extern void svc_getreqset(fd_set *); 669 extern void svc_getreq_common(int); 670 struct pollfd; 671 extern void svc_getreq_poll(struct pollfd *, int); 672 extern void svc_run(void); 673 extern void svc_exit(void); 674 #else 675 extern void svc_run(SVCPOOL *); 676 extern void svc_exit(SVCPOOL *); 677 extern bool_t svc_getargs(struct svc_req *, xdrproc_t, void *); 678 extern bool_t svc_freeargs(struct svc_req *, xdrproc_t, void *); 679 extern void svc_freereq(struct svc_req *); 680 681 #endif 682 __END_DECLS 683 684 /* 685 * Socket to use on svcxxx_create call to get default socket 686 */ 687 #define RPC_ANYSOCK -1 688 #define RPC_ANYFD RPC_ANYSOCK 689 690 /* 691 * These are the existing service side transport implementations 692 */ 693 694 __BEGIN_DECLS 695 696 #ifdef _KERNEL 697 698 /* 699 * Create a new service pool. 700 */ 701 extern SVCPOOL* svcpool_create(const char *name, 702 struct sysctl_oid_list *sysctl_base); 703 704 /* 705 * Destroy a service pool, including all registered transports. 706 */ 707 extern void svcpool_destroy(SVCPOOL *pool); 708 709 /* 710 * Transport independent svc_create routine. 711 */ 712 extern int svc_create(SVCPOOL *, void (*)(struct svc_req *, SVCXPRT *), 713 const rpcprog_t, const rpcvers_t, const char *); 714 /* 715 * void (*dispatch)(); -- dispatch routine 716 * const rpcprog_t prognum; -- program number 717 * const rpcvers_t versnum; -- version number 718 * const char *nettype; -- network type 719 */ 720 721 722 /* 723 * Generic server creation routine. It takes a netconfig structure 724 * instead of a nettype. 725 */ 726 727 extern SVCXPRT *svc_tp_create(SVCPOOL *, void (*)(struct svc_req *, SVCXPRT *), 728 const rpcprog_t, const rpcvers_t, const char *uaddr, 729 const struct netconfig *); 730 /* 731 * void (*dispatch)(); -- dispatch routine 732 * const rpcprog_t prognum; -- program number 733 * const rpcvers_t versnum; -- version number 734 * const char *uaddr; -- universal address of service 735 * const struct netconfig *nconf; -- netconfig structure 736 */ 737 738 extern SVCXPRT *svc_dg_create(SVCPOOL *, struct socket *, 739 const size_t, const size_t); 740 /* 741 * struct socket *; -- open connection 742 * const size_t sendsize; -- max send size 743 * const size_t recvsize; -- max recv size 744 */ 745 746 extern SVCXPRT *svc_vc_create(SVCPOOL *, struct socket *, 747 const size_t, const size_t); 748 /* 749 * struct socket *; -- open connection 750 * const size_t sendsize; -- max send size 751 * const size_t recvsize; -- max recv size 752 */ 753 754 extern SVCXPRT *svc_vc_create_backchannel(SVCPOOL *); 755 756 /* 757 * Generic TLI create routine 758 */ 759 extern SVCXPRT *svc_tli_create(SVCPOOL *, struct socket *, 760 const struct netconfig *, const struct t_bind *, const size_t, const size_t); 761 /* 762 * struct socket * so; -- connection end point 763 * const struct netconfig *nconf; -- netconfig structure for network 764 * const struct t_bind *bindaddr; -- local bind address 765 * const size_t sendsz; -- max sendsize 766 * const size_t recvsz; -- max recvsize 767 */ 768 769 #else /* !_KERNEL */ 770 771 /* 772 * Transport independent svc_create routine. 773 */ 774 extern int svc_create(void (*)(struct svc_req *, SVCXPRT *), 775 const rpcprog_t, const rpcvers_t, const char *); 776 /* 777 * void (*dispatch)(); -- dispatch routine 778 * const rpcprog_t prognum; -- program number 779 * const rpcvers_t versnum; -- version number 780 * const char *nettype; -- network type 781 */ 782 783 784 /* 785 * Generic server creation routine. It takes a netconfig structure 786 * instead of a nettype. 787 */ 788 789 extern SVCXPRT *svc_tp_create(void (*)(struct svc_req *, SVCXPRT *), 790 const rpcprog_t, const rpcvers_t, 791 const struct netconfig *); 792 /* 793 * void (*dispatch)(); -- dispatch routine 794 * const rpcprog_t prognum; -- program number 795 * const rpcvers_t versnum; -- version number 796 * const struct netconfig *nconf; -- netconfig structure 797 */ 798 799 /* 800 * Generic TLI create routine 801 */ 802 extern SVCXPRT *svc_tli_create(const int, const struct netconfig *, 803 const struct t_bind *, const u_int, 804 const u_int); 805 /* 806 * const int fd; -- connection end point 807 * const struct netconfig *nconf; -- netconfig structure for network 808 * const struct t_bind *bindaddr; -- local bind address 809 * const u_int sendsz; -- max sendsize 810 * const u_int recvsz; -- max recvsize 811 */ 812 813 /* 814 * Connectionless and connectionful create routines 815 */ 816 817 extern SVCXPRT *svc_vc_create(const int, const u_int, const u_int); 818 /* 819 * const int fd; -- open connection end point 820 * const u_int sendsize; -- max send size 821 * const u_int recvsize; -- max recv size 822 */ 823 824 /* 825 * Added for compatibility to old rpc 4.0. Obsoleted by svc_vc_create(). 826 */ 827 extern SVCXPRT *svcunix_create(int, u_int, u_int, char *); 828 829 extern SVCXPRT *svc_dg_create(const int, const u_int, const u_int); 830 /* 831 * const int fd; -- open connection 832 * const u_int sendsize; -- max send size 833 * const u_int recvsize; -- max recv size 834 */ 835 836 837 /* 838 * the routine takes any *open* connection 839 * descriptor as its first input and is used for open connections. 840 */ 841 extern SVCXPRT *svc_fd_create(const int, const u_int, const u_int); 842 /* 843 * const int fd; -- open connection end point 844 * const u_int sendsize; -- max send size 845 * const u_int recvsize; -- max recv size 846 */ 847 848 /* 849 * Added for compatibility to old rpc 4.0. Obsoleted by svc_fd_create(). 850 */ 851 extern SVCXPRT *svcunixfd_create(int, u_int, u_int); 852 853 /* 854 * Memory based rpc (for speed check and testing) 855 */ 856 extern SVCXPRT *svc_raw_create(void); 857 858 /* 859 * svc_dg_enable_cache() enables the cache on dg transports. 860 */ 861 int svc_dg_enablecache(SVCXPRT *, const u_int); 862 863 int __rpc_get_local_uid(SVCXPRT *_transp, uid_t *_uid); 864 865 #endif /* !_KERNEL */ 866 867 __END_DECLS 868 869 #ifndef _KERNEL 870 /* for backward compatibility */ 871 #include <rpc/svc_soc.h> 872 #endif 873 874 #endif /* !_RPC_SVC_H */ 875