blob: 40e0a273faea3c07470e19fd23673fda89543f9b [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * linux/include/linux/sunrpc/svc.h
3 *
4 * RPC server declarations.
5 *
6 * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
7 */
8
9
10#ifndef SUNRPC_SVC_H
11#define SUNRPC_SVC_H
12
13#include <linux/in.h>
Chuck Lever73df0db2007-02-12 00:53:35 -080014#include <linux/in6.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070015#include <linux/sunrpc/types.h>
16#include <linux/sunrpc/xdr.h>
Greg Banks7adae482006-10-04 02:15:47 -070017#include <linux/sunrpc/auth.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#include <linux/sunrpc/svcauth.h>
19#include <linux/wait.h>
20#include <linux/mm.h>
21
Greg Banksa7455442006-10-02 02:17:59 -070022/*
23 * This is the RPC server thread function prototype
24 */
Jeff Layton9867d762008-06-10 08:40:38 -040025typedef int (*svc_thread_fn)(void *);
Greg Banks3262c812006-10-02 02:17:58 -070026
Greg Banks03cf6c92009-01-13 21:26:36 +110027/* statistics for svc_pool structures */
28struct svc_pool_stats {
29 unsigned long packets;
30 unsigned long sockets_queued;
31 unsigned long threads_woken;
Greg Banks03cf6c92009-01-13 21:26:36 +110032 unsigned long threads_timedout;
33};
34
Greg Banks3262c812006-10-02 02:17:58 -070035/*
36 *
37 * RPC service thread pool.
38 *
39 * Pool of threads and temporary sockets. Generally there is only
40 * a single one of these per RPC service, but on NUMA machines those
41 * services that can benefit from it (i.e. nfs but not lockd) will
42 * have one pool per NUMA node. This optimisation reduces cross-
43 * node traffic on multi-node NUMA NFS servers.
44 */
45struct svc_pool {
46 unsigned int sp_id; /* pool id; also node id on NUMA */
47 spinlock_t sp_lock; /* protects all fields */
48 struct list_head sp_threads; /* idle server threads */
49 struct list_head sp_sockets; /* pending sockets */
50 unsigned int sp_nrthreads; /* # of threads in pool */
Greg Banksa7455442006-10-02 02:17:59 -070051 struct list_head sp_all_threads; /* all server threads */
Greg Banks03cf6c92009-01-13 21:26:36 +110052 struct svc_pool_stats sp_stats; /* statistics on pool operation */
Greg Banks3262c812006-10-02 02:17:58 -070053} ____cacheline_aligned_in_smp;
54
Linus Torvalds1da177e2005-04-16 15:20:36 -070055/*
56 * RPC service.
57 *
58 * An RPC service is a ``daemon,'' possibly multithreaded, which
59 * receives and processes incoming RPC messages.
60 * It has one or more transport sockets associated with it, and maintains
61 * a list of idle threads waiting for input.
62 *
63 * We currently do not support more than one RPC program per daemon.
64 */
65struct svc_serv {
Linus Torvalds1da177e2005-04-16 15:20:36 -070066 struct svc_program * sv_program; /* RPC program */
67 struct svc_stat * sv_stats; /* RPC statistics */
68 spinlock_t sv_lock;
69 unsigned int sv_nrthreads; /* # of server threads */
Jeff Laytonc9233eb2008-10-20 11:51:57 -040070 unsigned int sv_maxconn; /* max connections allowed or
71 * '0' causing max to be based
72 * on number of threads. */
73
NeilBrownc6b0a9f2006-10-06 00:44:05 -070074 unsigned int sv_max_payload; /* datagram payload size */
75 unsigned int sv_max_mesg; /* max_payload + 1 page for overheads */
Linus Torvalds1da177e2005-04-16 15:20:36 -070076 unsigned int sv_xdrsize; /* XDR buffer size */
Linus Torvalds1da177e2005-04-16 15:20:36 -070077 struct list_head sv_permsocks; /* all permanent sockets */
78 struct list_head sv_tempsocks; /* all temporary sockets */
79 int sv_tmpcnt; /* count of temporary sockets */
Greg Banks36bdfc82006-10-02 02:17:54 -070080 struct timer_list sv_temptimer; /* timer for aging temporary sockets */
Linus Torvalds1da177e2005-04-16 15:20:36 -070081
82 char * sv_name; /* service name */
NeilBrownbc591cc2006-10-02 02:17:44 -070083
Greg Banks3262c812006-10-02 02:17:58 -070084 unsigned int sv_nrpools; /* number of thread pools */
85 struct svc_pool * sv_pools; /* array of thread pools */
86
Stanislav Kinsbursky5ecebb72012-01-13 14:03:04 +040087 void (*sv_shutdown)(struct svc_serv *serv,
88 struct net *net);
NeilBrownbc591cc2006-10-02 02:17:44 -070089 /* Callback to use when last thread
90 * exits.
91 */
Greg Banksa7455442006-10-02 02:17:59 -070092
93 struct module * sv_module; /* optional module to count when
94 * adding threads */
95 svc_thread_fn sv_function; /* main function for threads */
Trond Myklebust9e00abc2011-07-13 19:20:49 -040096#if defined(CONFIG_SUNRPC_BACKCHANNEL)
Ricardo Labiaga56632b52009-04-01 09:22:58 -040097 struct list_head sv_cb_list; /* queue for callback requests
98 * that arrive over the same
99 * connection */
100 spinlock_t sv_cb_lock; /* protects the svc_cb_list */
101 wait_queue_head_t sv_cb_waitq; /* sleep here if there are no
102 * entries in the svc_cb_list */
Andy Adamson4a19de02011-01-06 02:04:35 +0000103 struct svc_xprt *sv_bc_xprt; /* callback on fore channel */
Trond Myklebust9e00abc2011-07-13 19:20:49 -0400104#endif /* CONFIG_SUNRPC_BACKCHANNEL */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105};
106
107/*
Greg Banks9a24ab52006-10-02 02:17:58 -0700108 * We use sv_nrthreads as a reference count. svc_destroy() drops
109 * this refcount, so we need to bump it up around operations that
110 * change the number of threads. Horrible, but there it is.
111 * Should be called with the BKL held.
112 */
113static inline void svc_get(struct svc_serv *serv)
114{
115 serv->sv_nrthreads++;
116}
117
118/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119 * Maximum payload size supported by a kernel RPC server.
120 * This is use to determine the max number of pages nfsd is
121 * willing to return in a single READ operation.
Greg Banks7adae482006-10-04 02:15:47 -0700122 *
123 * These happen to all be powers of 2, which is not strictly
124 * necessary but helps enforce the real limitation, which is
125 * that they should be multiples of PAGE_CACHE_SIZE.
126 *
127 * For UDP transports, a block plus NFS,RPC, and UDP headers
128 * has to fit into the IP datagram limit of 64K. The largest
129 * feasible number for all known page sizes is probably 48K,
130 * but we choose 32K here. This is the same as the historical
131 * Linux limit; someone who cares more about NFS/UDP performance
132 * can test a larger number.
133 *
134 * For TCP transports we have more freedom. A size of 1MB is
135 * chosen to match the client limit. Other OSes are known to
136 * have larger limits, but those numbers are probably beyond
137 * the point of diminishing returns.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 */
Greg Banks7adae482006-10-04 02:15:47 -0700139#define RPCSVC_MAXPAYLOAD (1*1024*1024u)
140#define RPCSVC_MAXPAYLOAD_TCP RPCSVC_MAXPAYLOAD
141#define RPCSVC_MAXPAYLOAD_UDP (32*1024u)
142
143extern u32 svc_max_payload(const struct svc_rqst *rqstp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144
145/*
146 * RPC Requsts and replies are stored in one or more pages.
147 * We maintain an array of pages for each server thread.
148 * Requests are copied into these pages as they arrive. Remaining
149 * pages are available to write the reply into.
150 *
151 * Pages are sent using ->sendpage so each server thread needs to
152 * allocate more to replace those used in sending. To help keep track
153 * of these pages we have a receive list where all pages initialy live,
154 * and a send list where pages are moved to when there are to be part
155 * of a reply.
156 *
157 * We use xdr_buf for holding responses as it fits well with NFS
158 * read responses (that have a header, and some data pages, and possibly
159 * a tail) and means we can share some client side routines.
160 *
161 * The xdr_buf.head kvec always points to the first page in the rq_*pages
162 * list. The xdr_buf.pages pointer points to the second page on that
163 * list. xdr_buf.tail points to the end of the first page.
164 * This assumes that the non-page part of an rpc reply will fit
165 * in a page - NFSd ensures this. lockd also has no trouble.
166 *
167 * Each request/reply pair can have at most one "payload", plus two pages,
168 * one for the request, and one for the reply.
NeilBrown250f3912007-01-26 00:56:59 -0800169 * We using ->sendfile to return read data, we might need one extra page
170 * if the request is not page-aligned. So add another '1'.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171 */
NeilBrown250f3912007-01-26 00:56:59 -0800172#define RPCSVC_MAXPAGES ((RPCSVC_MAXPAYLOAD+PAGE_SIZE-1)/PAGE_SIZE \
173 + 2 + 1)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174
Alexey Dobriyan76994312006-09-26 22:28:46 -0700175static inline u32 svc_getnl(struct kvec *iov)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176{
Alexey Dobriyan76994312006-09-26 22:28:46 -0700177 __be32 val, *vp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178 vp = iov->iov_base;
179 val = *vp++;
180 iov->iov_base = (void*)vp;
Alexey Dobriyan76994312006-09-26 22:28:46 -0700181 iov->iov_len -= sizeof(__be32);
182 return ntohl(val);
183}
184
185static inline void svc_putnl(struct kvec *iov, u32 val)
186{
187 __be32 *vp = iov->iov_base + iov->iov_len;
188 *vp = htonl(val);
189 iov->iov_len += sizeof(__be32);
190}
191
192static inline __be32 svc_getu32(struct kvec *iov)
193{
194 __be32 val, *vp;
195 vp = iov->iov_base;
196 val = *vp++;
197 iov->iov_base = (void*)vp;
198 iov->iov_len -= sizeof(__be32);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199 return val;
200}
201
202static inline void svc_ungetu32(struct kvec *iov)
203{
Alexey Dobriyan76994312006-09-26 22:28:46 -0700204 __be32 *vp = (__be32 *)iov->iov_base;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205 iov->iov_base = (void *)(vp - 1);
206 iov->iov_len += sizeof(*vp);
207}
208
Alexey Dobriyan76994312006-09-26 22:28:46 -0700209static inline void svc_putu32(struct kvec *iov, __be32 val)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210{
Alexey Dobriyan76994312006-09-26 22:28:46 -0700211 __be32 *vp = iov->iov_base + iov->iov_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212 *vp = val;
Alexey Dobriyan76994312006-09-26 22:28:46 -0700213 iov->iov_len += sizeof(__be32);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214}
215
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216/*
217 * The context of a single thread, including the request currently being
218 * processed.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219 */
220struct svc_rqst {
221 struct list_head rq_list; /* idle list */
Greg Banksa7455442006-10-02 02:17:59 -0700222 struct list_head rq_all; /* all threads list */
Tom Tucker57b1d3b2007-12-30 21:08:22 -0600223 struct svc_xprt * rq_xprt; /* transport ptr */
Mi Jinlong849a1cf2011-08-30 17:18:41 +0800224
Chuck Lever27459f02007-02-12 00:53:34 -0800225 struct sockaddr_storage rq_addr; /* peer address */
226 size_t rq_addrlen;
Mi Jinlong849a1cf2011-08-30 17:18:41 +0800227 struct sockaddr_storage rq_daddr; /* dest addr of request
228 * - reply from here */
229 size_t rq_daddrlen;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230
231 struct svc_serv * rq_server; /* RPC service definition */
Greg Banks3262c812006-10-02 02:17:58 -0700232 struct svc_pool * rq_pool; /* thread pool */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233 struct svc_procedure * rq_procinfo; /* procedure info */
234 struct auth_ops * rq_authop; /* authentication flavour */
235 struct svc_cred rq_cred; /* auth info */
Tom Tucker5148bf42007-12-30 21:07:25 -0600236 void * rq_xprt_ctxt; /* transport specific context ptr */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237 struct svc_deferred_req*rq_deferred; /* deferred request we are replaying */
Andy Adamson2f425872009-04-03 08:27:32 +0300238 int rq_usedeferral; /* use deferral */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239
Tom Tucker260c1d12007-12-30 21:08:29 -0600240 size_t rq_xprt_hlen; /* xprt header len */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241 struct xdr_buf rq_arg;
242 struct xdr_buf rq_res;
NeilBrown44524352006-10-04 02:15:46 -0700243 struct page * rq_pages[RPCSVC_MAXPAGES];
244 struct page * *rq_respages; /* points into rq_pages */
245 int rq_resused; /* number of pages used for result */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246
NeilBrown3cc03b12006-10-04 02:15:47 -0700247 struct kvec rq_vec[RPCSVC_MAXPAGES]; /* generally useful.. */
248
Alexey Dobriyand8ed0292006-09-26 22:29:38 -0700249 __be32 rq_xid; /* transmission id */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250 u32 rq_prog; /* program number */
251 u32 rq_vers; /* program version */
252 u32 rq_proc; /* procedure number */
253 u32 rq_prot; /* IP protocol */
254 unsigned short
255 rq_secure : 1; /* secure port */
256
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257 void * rq_argp; /* decoded arguments */
258 void * rq_resp; /* xdr'd results */
259 void * rq_auth_data; /* flavor-specific data */
260
261 int rq_reserved; /* space on socket outq
262 * reserved for this request
263 */
264
265 struct cache_req rq_chandle; /* handle passed to caches for
266 * request delaying
267 */
J. Bruce Fields9e701c62011-01-02 21:56:36 -0500268 bool rq_dropme;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269 /* Catering to nfsd */
270 struct auth_domain * rq_client; /* RPC peer info */
J. Bruce Fields3ab4d8b2007-07-17 04:04:46 -0700271 struct auth_domain * rq_gssclient; /* "gss/"-style peer info */
J. Bruce Fields10910062011-01-24 12:11:02 -0500272 int rq_cachetype;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273 struct svc_cacherep * rq_cacherep; /* cache info */
Jens Axboecf8208d2007-06-12 21:22:14 +0200274 int rq_splice_ok; /* turned off in gss privacy
J. Bruce Fields5c04c462006-06-30 01:56:19 -0700275 * to prevent encrypting page
276 * cache pages */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277 wait_queue_head_t rq_wait; /* synchronization */
Greg Banksa7455442006-10-02 02:17:59 -0700278 struct task_struct *rq_task; /* service thread */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279};
280
281/*
Chuck Lever27459f02007-02-12 00:53:34 -0800282 * Rigorous type checking on sockaddr type conversions
283 */
Chuck Lever5344b122008-08-27 16:57:46 -0400284static inline struct sockaddr_in *svc_addr_in(const struct svc_rqst *rqst)
Chuck Lever27459f02007-02-12 00:53:34 -0800285{
286 return (struct sockaddr_in *) &rqst->rq_addr;
287}
288
Chuck Lever5344b122008-08-27 16:57:46 -0400289static inline struct sockaddr_in6 *svc_addr_in6(const struct svc_rqst *rqst)
Chuck Lever95756482007-02-12 00:53:38 -0800290{
291 return (struct sockaddr_in6 *) &rqst->rq_addr;
292}
293
Chuck Lever5344b122008-08-27 16:57:46 -0400294static inline struct sockaddr *svc_addr(const struct svc_rqst *rqst)
Chuck Lever27459f02007-02-12 00:53:34 -0800295{
296 return (struct sockaddr *) &rqst->rq_addr;
297}
298
Mi Jinlong849a1cf2011-08-30 17:18:41 +0800299static inline struct sockaddr_in *svc_daddr_in(const struct svc_rqst *rqst)
300{
301 return (struct sockaddr_in *) &rqst->rq_daddr;
302}
303
304static inline struct sockaddr_in6 *svc_daddr_in6(const struct svc_rqst *rqst)
305{
306 return (struct sockaddr_in6 *) &rqst->rq_daddr;
307}
308
309static inline struct sockaddr *svc_daddr(const struct svc_rqst *rqst)
310{
311 return (struct sockaddr *) &rqst->rq_daddr;
312}
313
Chuck Lever27459f02007-02-12 00:53:34 -0800314/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315 * Check buffer bounds after decoding arguments
316 */
317static inline int
Alexey Dobriyand8ed0292006-09-26 22:29:38 -0700318xdr_argsize_check(struct svc_rqst *rqstp, __be32 *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319{
320 char *cp = (char *)p;
321 struct kvec *vec = &rqstp->rq_arg.head[0];
NeilBrown0ba75362005-11-07 01:00:26 -0800322 return cp >= (char*)vec->iov_base
323 && cp <= (char*)vec->iov_base + vec->iov_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324}
325
326static inline int
Alexey Dobriyand8ed0292006-09-26 22:29:38 -0700327xdr_ressize_check(struct svc_rqst *rqstp, __be32 *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328{
329 struct kvec *vec = &rqstp->rq_res.head[0];
330 char *cp = (char*)p;
331
332 vec->iov_len = cp - (char*)vec->iov_base;
333
334 return vec->iov_len <= PAGE_SIZE;
335}
336
NeilBrown44524352006-10-04 02:15:46 -0700337static inline void svc_free_res_pages(struct svc_rqst *rqstp)
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000338{
NeilBrown44524352006-10-04 02:15:46 -0700339 while (rqstp->rq_resused) {
340 struct page **pp = (rqstp->rq_respages +
341 --rqstp->rq_resused);
342 if (*pp) {
343 put_page(*pp);
344 *pp = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345 }
346 }
347}
348
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349struct svc_deferred_req {
350 u32 prot; /* protocol (UDP or TCP) */
Tom Tucker8c7b0172007-12-30 21:08:10 -0600351 struct svc_xprt *xprt;
Chuck Lever24422222007-02-12 00:53:33 -0800352 struct sockaddr_storage addr; /* where reply must go */
353 size_t addrlen;
Mi Jinlong849a1cf2011-08-30 17:18:41 +0800354 struct sockaddr_storage daddr; /* where reply must come from */
355 size_t daddrlen;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356 struct cache_deferred_req handle;
Tom Tucker260c1d12007-12-30 21:08:29 -0600357 size_t xprt_hlen;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358 int argslen;
Alexey Dobriyand8ed0292006-09-26 22:29:38 -0700359 __be32 args[0];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360};
361
362/*
Andreas Gruenbacher9ba02632005-06-22 17:16:24 +0000363 * List of RPC programs on the same transport endpoint
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364 */
365struct svc_program {
Andreas Gruenbacher9ba02632005-06-22 17:16:24 +0000366 struct svc_program * pg_next; /* other programs (same xprt) */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367 u32 pg_prog; /* program number */
368 unsigned int pg_lovers; /* lowest version */
369 unsigned int pg_hivers; /* lowest version */
370 unsigned int pg_nvers; /* number of versions */
371 struct svc_version ** pg_vers; /* version array */
372 char * pg_name; /* service name */
373 char * pg_class; /* class name: services sharing authentication */
374 struct svc_stat * pg_stats; /* rpc statistics */
375 int (*pg_authenticate)(struct svc_rqst *);
376};
377
378/*
379 * RPC program version
380 */
381struct svc_version {
382 u32 vs_vers; /* version number */
383 u32 vs_nproc; /* number of procedures */
384 struct svc_procedure * vs_proc; /* per-procedure info */
385 u32 vs_xdrsize; /* xdrsize needed for this version */
386
Olaf Kirchbc5fea42006-10-04 02:16:05 -0700387 unsigned int vs_hidden : 1; /* Don't register with portmapper.
388 * Only used for nfsacl so far. */
389
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390 /* Override dispatch function (e.g. when caching replies).
391 * A return value of 0 means drop the request.
392 * vs_dispatch == NULL means use default dispatcher.
393 */
Alexey Dobriyand8ed0292006-09-26 22:29:38 -0700394 int (*vs_dispatch)(struct svc_rqst *, __be32 *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395};
396
397/*
398 * RPC procedure info
399 */
Al Viro7111c662006-10-19 23:28:45 -0700400typedef __be32 (*svc_procfunc)(struct svc_rqst *, void *argp, void *resp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401struct svc_procedure {
402 svc_procfunc pc_func; /* process the request */
403 kxdrproc_t pc_decode; /* XDR decode args */
404 kxdrproc_t pc_encode; /* XDR encode result */
405 kxdrproc_t pc_release; /* XDR free result */
406 unsigned int pc_argsize; /* argument struct size */
407 unsigned int pc_ressize; /* result struct size */
408 unsigned int pc_count; /* call count */
409 unsigned int pc_cachetype; /* cache info (NFS) */
410 unsigned int pc_xdrressize; /* maximum size of XDR reply */
411};
412
413/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414 * Function prototypes.
415 */
Stanislav Kinsburskybb2224d2012-01-31 15:08:05 +0400416int svc_rpcb_setup(struct svc_serv *serv, struct net *net);
Stanislav Kinsbursky5ecebb72012-01-13 14:03:04 +0400417void svc_rpcb_cleanup(struct svc_serv *serv, struct net *net);
Stanislav Kinsbursky9793f7c2012-05-02 16:08:38 +0400418int svc_bind(struct svc_serv *serv, struct net *net);
Chuck Lever49a90722009-03-18 20:46:29 -0400419struct svc_serv *svc_create(struct svc_program *, unsigned int,
Stanislav Kinsbursky5ecebb72012-01-13 14:03:04 +0400420 void (*shutdown)(struct svc_serv *, struct net *net));
Jeff Layton0113ab32008-01-29 10:30:54 -0500421struct svc_rqst *svc_prepare_thread(struct svc_serv *serv,
Eric Dumazet11fd1652011-07-28 20:04:09 +0200422 struct svc_pool *pool, int node);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423void svc_exit_thread(struct svc_rqst *);
Greg Banksa7455442006-10-02 02:17:59 -0700424struct svc_serv * svc_create_pooled(struct svc_program *, unsigned int,
Stanislav Kinsbursky5ecebb72012-01-13 14:03:04 +0400425 void (*shutdown)(struct svc_serv *, struct net *net),
Chuck Levere851db52008-06-30 18:45:30 -0400426 svc_thread_fn, struct module *);
Greg Banksa7455442006-10-02 02:17:59 -0700427int svc_set_num_threads(struct svc_serv *, struct svc_pool *, int);
Greg Banks03cf6c92009-01-13 21:26:36 +1100428int svc_pool_stats_open(struct svc_serv *serv, struct file *file);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429void svc_destroy(struct svc_serv *);
Stanislav Kinsburskybb2224d2012-01-31 15:08:05 +0400430void svc_shutdown_net(struct svc_serv *, struct net *);
NeilBrown6fb2b472006-10-02 02:17:50 -0700431int svc_process(struct svc_rqst *);
Ricardo Labiaga4d6bbb62009-04-01 09:23:07 -0400432int bc_svc_process(struct svc_serv *, struct rpc_rqst *,
433 struct svc_rqst *);
Stanislav Kinsbursky5247fab2012-01-13 14:02:48 +0400434int svc_register(const struct svc_serv *, struct net *, const int,
Chuck Lever4b62e582009-03-18 20:46:06 -0400435 const unsigned short, const unsigned short);
Chuck Levera26cfad2008-08-18 19:34:16 -0400436
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437void svc_wake_up(struct svc_serv *);
438void svc_reserve(struct svc_rqst *rqstp, int space);
Greg Banksbfd24162006-10-02 02:18:01 -0700439struct svc_pool * svc_pool_for_cpu(struct svc_serv *serv, int cpu);
Chuck Leverad06e4b2007-02-12 00:53:32 -0800440char * svc_print_addr(struct svc_rqst *, char *, size_t);
441
442#define RPC_MAX_ADDRBUFLEN (63U)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443
Jeff Laytoncd123012007-05-09 02:34:50 -0700444/*
445 * When we want to reduce the size of the reserved space in the response
446 * buffer, we need to take into account the size of any checksum data that
447 * may be at the end of the packet. This is difficult to determine exactly
448 * for all cases without actually generating the checksum, so we just use a
449 * static value.
450 */
J. Bruce Fieldsfbb78782008-02-07 23:10:21 -0500451static inline void svc_reserve_auth(struct svc_rqst *rqstp, int space)
Jeff Laytoncd123012007-05-09 02:34:50 -0700452{
J. Bruce Fieldsfbb78782008-02-07 23:10:21 -0500453 int added_space = 0;
Jeff Laytoncd123012007-05-09 02:34:50 -0700454
J. Bruce Fieldsfbb78782008-02-07 23:10:21 -0500455 if (rqstp->rq_authop->flavour)
456 added_space = RPC_MAX_AUTH_SIZE;
457 svc_reserve(rqstp, space + added_space);
Jeff Laytoncd123012007-05-09 02:34:50 -0700458}
459
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460#endif /* SUNRPC_SVC_H */