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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
NeilBrownbc591cc2006-10-02 02:17:44 -070087 void (*sv_shutdown)(struct svc_serv *serv);
88 /* Callback to use when last thread
89 * exits.
90 */
Greg Banksa7455442006-10-02 02:17:59 -070091
92 struct module * sv_module; /* optional module to count when
93 * adding threads */
94 svc_thread_fn sv_function; /* main function for threads */
Ricardo Labiaga56632b52009-04-01 09:22:58 -040095#if defined(CONFIG_NFS_V4_1)
96 struct list_head sv_cb_list; /* queue for callback requests
97 * that arrive over the same
98 * connection */
99 spinlock_t sv_cb_lock; /* protects the svc_cb_list */
100 wait_queue_head_t sv_cb_waitq; /* sleep here if there are no
101 * entries in the svc_cb_list */
Andy Adamson4a19de02011-01-06 02:04:35 +0000102 struct svc_xprt *sv_bc_xprt; /* callback on fore channel */
Ricardo Labiaga56632b52009-04-01 09:22:58 -0400103#endif /* CONFIG_NFS_V4_1 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104};
105
106/*
Greg Banks9a24ab52006-10-02 02:17:58 -0700107 * We use sv_nrthreads as a reference count. svc_destroy() drops
108 * this refcount, so we need to bump it up around operations that
109 * change the number of threads. Horrible, but there it is.
110 * Should be called with the BKL held.
111 */
112static inline void svc_get(struct svc_serv *serv)
113{
114 serv->sv_nrthreads++;
115}
116
117/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118 * Maximum payload size supported by a kernel RPC server.
119 * This is use to determine the max number of pages nfsd is
120 * willing to return in a single READ operation.
Greg Banks7adae482006-10-04 02:15:47 -0700121 *
122 * These happen to all be powers of 2, which is not strictly
123 * necessary but helps enforce the real limitation, which is
124 * that they should be multiples of PAGE_CACHE_SIZE.
125 *
126 * For UDP transports, a block plus NFS,RPC, and UDP headers
127 * has to fit into the IP datagram limit of 64K. The largest
128 * feasible number for all known page sizes is probably 48K,
129 * but we choose 32K here. This is the same as the historical
130 * Linux limit; someone who cares more about NFS/UDP performance
131 * can test a larger number.
132 *
133 * For TCP transports we have more freedom. A size of 1MB is
134 * chosen to match the client limit. Other OSes are known to
135 * have larger limits, but those numbers are probably beyond
136 * the point of diminishing returns.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137 */
Greg Banks7adae482006-10-04 02:15:47 -0700138#define RPCSVC_MAXPAYLOAD (1*1024*1024u)
139#define RPCSVC_MAXPAYLOAD_TCP RPCSVC_MAXPAYLOAD
140#define RPCSVC_MAXPAYLOAD_UDP (32*1024u)
141
142extern u32 svc_max_payload(const struct svc_rqst *rqstp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143
144/*
145 * RPC Requsts and replies are stored in one or more pages.
146 * We maintain an array of pages for each server thread.
147 * Requests are copied into these pages as they arrive. Remaining
148 * pages are available to write the reply into.
149 *
150 * Pages are sent using ->sendpage so each server thread needs to
151 * allocate more to replace those used in sending. To help keep track
152 * of these pages we have a receive list where all pages initialy live,
153 * and a send list where pages are moved to when there are to be part
154 * of a reply.
155 *
156 * We use xdr_buf for holding responses as it fits well with NFS
157 * read responses (that have a header, and some data pages, and possibly
158 * a tail) and means we can share some client side routines.
159 *
160 * The xdr_buf.head kvec always points to the first page in the rq_*pages
161 * list. The xdr_buf.pages pointer points to the second page on that
162 * list. xdr_buf.tail points to the end of the first page.
163 * This assumes that the non-page part of an rpc reply will fit
164 * in a page - NFSd ensures this. lockd also has no trouble.
165 *
166 * Each request/reply pair can have at most one "payload", plus two pages,
167 * one for the request, and one for the reply.
NeilBrown250f3912007-01-26 00:56:59 -0800168 * We using ->sendfile to return read data, we might need one extra page
169 * if the request is not page-aligned. So add another '1'.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 */
NeilBrown250f3912007-01-26 00:56:59 -0800171#define RPCSVC_MAXPAGES ((RPCSVC_MAXPAYLOAD+PAGE_SIZE-1)/PAGE_SIZE \
172 + 2 + 1)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173
Alexey Dobriyan76994312006-09-26 22:28:46 -0700174static inline u32 svc_getnl(struct kvec *iov)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175{
Alexey Dobriyan76994312006-09-26 22:28:46 -0700176 __be32 val, *vp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177 vp = iov->iov_base;
178 val = *vp++;
179 iov->iov_base = (void*)vp;
Alexey Dobriyan76994312006-09-26 22:28:46 -0700180 iov->iov_len -= sizeof(__be32);
181 return ntohl(val);
182}
183
184static inline void svc_putnl(struct kvec *iov, u32 val)
185{
186 __be32 *vp = iov->iov_base + iov->iov_len;
187 *vp = htonl(val);
188 iov->iov_len += sizeof(__be32);
189}
190
191static inline __be32 svc_getu32(struct kvec *iov)
192{
193 __be32 val, *vp;
194 vp = iov->iov_base;
195 val = *vp++;
196 iov->iov_base = (void*)vp;
197 iov->iov_len -= sizeof(__be32);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198 return val;
199}
200
201static inline void svc_ungetu32(struct kvec *iov)
202{
Alexey Dobriyan76994312006-09-26 22:28:46 -0700203 __be32 *vp = (__be32 *)iov->iov_base;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204 iov->iov_base = (void *)(vp - 1);
205 iov->iov_len += sizeof(*vp);
206}
207
Alexey Dobriyan76994312006-09-26 22:28:46 -0700208static inline void svc_putu32(struct kvec *iov, __be32 val)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209{
Alexey Dobriyan76994312006-09-26 22:28:46 -0700210 __be32 *vp = iov->iov_base + iov->iov_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211 *vp = val;
Alexey Dobriyan76994312006-09-26 22:28:46 -0700212 iov->iov_len += sizeof(__be32);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213}
214
Chuck Lever73df0db2007-02-12 00:53:35 -0800215union svc_addr_u {
216 struct in_addr addr;
Chuck Lever73df0db2007-02-12 00:53:35 -0800217 struct in6_addr addr6;
Chuck Lever73df0db2007-02-12 00:53:35 -0800218};
219
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220/*
221 * The context of a single thread, including the request currently being
222 * processed.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223 */
224struct svc_rqst {
225 struct list_head rq_list; /* idle list */
Greg Banksa7455442006-10-02 02:17:59 -0700226 struct list_head rq_all; /* all threads list */
Tom Tucker57b1d3b2007-12-30 21:08:22 -0600227 struct svc_xprt * rq_xprt; /* transport ptr */
Chuck Lever27459f02007-02-12 00:53:34 -0800228 struct sockaddr_storage rq_addr; /* peer address */
229 size_t rq_addrlen;
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 */
Andy Adamsonc4170582007-07-17 04:04:42 -0700235 u32 rq_flavor; /* pseudoflavor */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236 struct svc_cred rq_cred; /* auth info */
Tom Tucker5148bf42007-12-30 21:07:25 -0600237 void * rq_xprt_ctxt; /* transport specific context ptr */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238 struct svc_deferred_req*rq_deferred; /* deferred request we are replaying */
Andy Adamson2f425872009-04-03 08:27:32 +0300239 int rq_usedeferral; /* use deferral */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240
Tom Tucker260c1d12007-12-30 21:08:29 -0600241 size_t rq_xprt_hlen; /* xprt header len */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242 struct xdr_buf rq_arg;
243 struct xdr_buf rq_res;
NeilBrown44524352006-10-04 02:15:46 -0700244 struct page * rq_pages[RPCSVC_MAXPAGES];
245 struct page * *rq_respages; /* points into rq_pages */
246 int rq_resused; /* number of pages used for result */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247
NeilBrown3cc03b12006-10-04 02:15:47 -0700248 struct kvec rq_vec[RPCSVC_MAXPAGES]; /* generally useful.. */
249
Alexey Dobriyand8ed0292006-09-26 22:29:38 -0700250 __be32 rq_xid; /* transmission id */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251 u32 rq_prog; /* program number */
252 u32 rq_vers; /* program version */
253 u32 rq_proc; /* procedure number */
254 u32 rq_prot; /* IP protocol */
255 unsigned short
256 rq_secure : 1; /* secure port */
257
Chuck Lever73df0db2007-02-12 00:53:35 -0800258 union svc_addr_u rq_daddr; /* dest addr of request
259 * - reply from here */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260
261 void * rq_argp; /* decoded arguments */
262 void * rq_resp; /* xdr'd results */
263 void * rq_auth_data; /* flavor-specific data */
264
265 int rq_reserved; /* space on socket outq
266 * reserved for this request
267 */
268
269 struct cache_req rq_chandle; /* handle passed to caches for
270 * request delaying
271 */
J. Bruce Fields9e701c62011-01-02 21:56:36 -0500272 bool rq_dropme;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273 /* Catering to nfsd */
274 struct auth_domain * rq_client; /* RPC peer info */
J. Bruce Fields3ab4d8b2007-07-17 04:04:46 -0700275 struct auth_domain * rq_gssclient; /* "gss/"-style peer info */
J. Bruce Fields10910062011-01-24 12:11:02 -0500276 int rq_cachetype;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277 struct svc_cacherep * rq_cacherep; /* cache info */
Jens Axboecf8208d2007-06-12 21:22:14 +0200278 int rq_splice_ok; /* turned off in gss privacy
J. Bruce Fields5c04c462006-06-30 01:56:19 -0700279 * to prevent encrypting page
280 * cache pages */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281 wait_queue_head_t rq_wait; /* synchronization */
Greg Banksa7455442006-10-02 02:17:59 -0700282 struct task_struct *rq_task; /* service thread */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283};
284
285/*
Chuck Lever27459f02007-02-12 00:53:34 -0800286 * Rigorous type checking on sockaddr type conversions
287 */
Chuck Lever5344b122008-08-27 16:57:46 -0400288static inline struct sockaddr_in *svc_addr_in(const struct svc_rqst *rqst)
Chuck Lever27459f02007-02-12 00:53:34 -0800289{
290 return (struct sockaddr_in *) &rqst->rq_addr;
291}
292
Chuck Lever5344b122008-08-27 16:57:46 -0400293static inline struct sockaddr_in6 *svc_addr_in6(const struct svc_rqst *rqst)
Chuck Lever95756482007-02-12 00:53:38 -0800294{
295 return (struct sockaddr_in6 *) &rqst->rq_addr;
296}
297
Chuck Lever5344b122008-08-27 16:57:46 -0400298static inline struct sockaddr *svc_addr(const struct svc_rqst *rqst)
Chuck Lever27459f02007-02-12 00:53:34 -0800299{
300 return (struct sockaddr *) &rqst->rq_addr;
301}
302
303/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304 * Check buffer bounds after decoding arguments
305 */
306static inline int
Alexey Dobriyand8ed0292006-09-26 22:29:38 -0700307xdr_argsize_check(struct svc_rqst *rqstp, __be32 *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308{
309 char *cp = (char *)p;
310 struct kvec *vec = &rqstp->rq_arg.head[0];
NeilBrown0ba75362005-11-07 01:00:26 -0800311 return cp >= (char*)vec->iov_base
312 && cp <= (char*)vec->iov_base + vec->iov_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313}
314
315static inline int
Alexey Dobriyand8ed0292006-09-26 22:29:38 -0700316xdr_ressize_check(struct svc_rqst *rqstp, __be32 *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317{
318 struct kvec *vec = &rqstp->rq_res.head[0];
319 char *cp = (char*)p;
320
321 vec->iov_len = cp - (char*)vec->iov_base;
322
323 return vec->iov_len <= PAGE_SIZE;
324}
325
NeilBrown44524352006-10-04 02:15:46 -0700326static inline void svc_free_res_pages(struct svc_rqst *rqstp)
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000327{
NeilBrown44524352006-10-04 02:15:46 -0700328 while (rqstp->rq_resused) {
329 struct page **pp = (rqstp->rq_respages +
330 --rqstp->rq_resused);
331 if (*pp) {
332 put_page(*pp);
333 *pp = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334 }
335 }
336}
337
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338struct svc_deferred_req {
339 u32 prot; /* protocol (UDP or TCP) */
Tom Tucker8c7b0172007-12-30 21:08:10 -0600340 struct svc_xprt *xprt;
Chuck Lever24422222007-02-12 00:53:33 -0800341 struct sockaddr_storage addr; /* where reply must go */
342 size_t addrlen;
Chuck Lever73df0db2007-02-12 00:53:35 -0800343 union svc_addr_u daddr; /* where reply must come from */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344 struct cache_deferred_req handle;
Tom Tucker260c1d12007-12-30 21:08:29 -0600345 size_t xprt_hlen;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346 int argslen;
Alexey Dobriyand8ed0292006-09-26 22:29:38 -0700347 __be32 args[0];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348};
349
350/*
Andreas Gruenbacher9ba02632005-06-22 17:16:24 +0000351 * List of RPC programs on the same transport endpoint
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352 */
353struct svc_program {
Andreas Gruenbacher9ba02632005-06-22 17:16:24 +0000354 struct svc_program * pg_next; /* other programs (same xprt) */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355 u32 pg_prog; /* program number */
356 unsigned int pg_lovers; /* lowest version */
357 unsigned int pg_hivers; /* lowest version */
358 unsigned int pg_nvers; /* number of versions */
359 struct svc_version ** pg_vers; /* version array */
360 char * pg_name; /* service name */
361 char * pg_class; /* class name: services sharing authentication */
362 struct svc_stat * pg_stats; /* rpc statistics */
363 int (*pg_authenticate)(struct svc_rqst *);
364};
365
366/*
367 * RPC program version
368 */
369struct svc_version {
370 u32 vs_vers; /* version number */
371 u32 vs_nproc; /* number of procedures */
372 struct svc_procedure * vs_proc; /* per-procedure info */
373 u32 vs_xdrsize; /* xdrsize needed for this version */
374
Olaf Kirchbc5fea42006-10-04 02:16:05 -0700375 unsigned int vs_hidden : 1; /* Don't register with portmapper.
376 * Only used for nfsacl so far. */
377
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378 /* Override dispatch function (e.g. when caching replies).
379 * A return value of 0 means drop the request.
380 * vs_dispatch == NULL means use default dispatcher.
381 */
Alexey Dobriyand8ed0292006-09-26 22:29:38 -0700382 int (*vs_dispatch)(struct svc_rqst *, __be32 *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383};
384
385/*
386 * RPC procedure info
387 */
Al Viro7111c662006-10-19 23:28:45 -0700388typedef __be32 (*svc_procfunc)(struct svc_rqst *, void *argp, void *resp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389struct svc_procedure {
390 svc_procfunc pc_func; /* process the request */
391 kxdrproc_t pc_decode; /* XDR decode args */
392 kxdrproc_t pc_encode; /* XDR encode result */
393 kxdrproc_t pc_release; /* XDR free result */
394 unsigned int pc_argsize; /* argument struct size */
395 unsigned int pc_ressize; /* result struct size */
396 unsigned int pc_count; /* call count */
397 unsigned int pc_cachetype; /* cache info (NFS) */
398 unsigned int pc_xdrressize; /* maximum size of XDR reply */
399};
400
401/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402 * Function prototypes.
403 */
Chuck Lever49a90722009-03-18 20:46:29 -0400404struct svc_serv *svc_create(struct svc_program *, unsigned int,
Chuck Levere851db52008-06-30 18:45:30 -0400405 void (*shutdown)(struct svc_serv *));
Jeff Layton0113ab32008-01-29 10:30:54 -0500406struct svc_rqst *svc_prepare_thread(struct svc_serv *serv,
407 struct svc_pool *pool);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408void svc_exit_thread(struct svc_rqst *);
Greg Banksa7455442006-10-02 02:17:59 -0700409struct svc_serv * svc_create_pooled(struct svc_program *, unsigned int,
Chuck Lever49a90722009-03-18 20:46:29 -0400410 void (*shutdown)(struct svc_serv *),
Chuck Levere851db52008-06-30 18:45:30 -0400411 svc_thread_fn, struct module *);
Greg Banksa7455442006-10-02 02:17:59 -0700412int svc_set_num_threads(struct svc_serv *, struct svc_pool *, int);
Greg Banks03cf6c92009-01-13 21:26:36 +1100413int svc_pool_stats_open(struct svc_serv *serv, struct file *file);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414void svc_destroy(struct svc_serv *);
NeilBrown6fb2b472006-10-02 02:17:50 -0700415int svc_process(struct svc_rqst *);
Ricardo Labiaga4d6bbb62009-04-01 09:23:07 -0400416int bc_svc_process(struct svc_serv *, struct rpc_rqst *,
417 struct svc_rqst *);
Chuck Lever4b62e582009-03-18 20:46:06 -0400418int svc_register(const struct svc_serv *, const int,
419 const unsigned short, const unsigned short);
Chuck Levera26cfad2008-08-18 19:34:16 -0400420
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421void svc_wake_up(struct svc_serv *);
422void svc_reserve(struct svc_rqst *rqstp, int space);
Greg Banksbfd24162006-10-02 02:18:01 -0700423struct svc_pool * svc_pool_for_cpu(struct svc_serv *serv, int cpu);
Chuck Leverad06e4b2007-02-12 00:53:32 -0800424char * svc_print_addr(struct svc_rqst *, char *, size_t);
425
426#define RPC_MAX_ADDRBUFLEN (63U)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427
Jeff Laytoncd123012007-05-09 02:34:50 -0700428/*
429 * When we want to reduce the size of the reserved space in the response
430 * buffer, we need to take into account the size of any checksum data that
431 * may be at the end of the packet. This is difficult to determine exactly
432 * for all cases without actually generating the checksum, so we just use a
433 * static value.
434 */
J. Bruce Fieldsfbb78782008-02-07 23:10:21 -0500435static inline void svc_reserve_auth(struct svc_rqst *rqstp, int space)
Jeff Laytoncd123012007-05-09 02:34:50 -0700436{
J. Bruce Fieldsfbb78782008-02-07 23:10:21 -0500437 int added_space = 0;
Jeff Laytoncd123012007-05-09 02:34:50 -0700438
J. Bruce Fieldsfbb78782008-02-07 23:10:21 -0500439 if (rqstp->rq_authop->flavour)
440 added_space = RPC_MAX_AUTH_SIZE;
441 svc_reserve(rqstp, space + added_space);
Jeff Laytoncd123012007-05-09 02:34:50 -0700442}
443
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444#endif /* SUNRPC_SVC_H */