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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
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> | |
73df0dba | 14 | #include <linux/in6.h> |
1da177e4 LT |
15 | #include <linux/sunrpc/types.h> |
16 | #include <linux/sunrpc/xdr.h> | |
7adae489 | 17 | #include <linux/sunrpc/auth.h> |
1da177e4 LT |
18 | #include <linux/sunrpc/svcauth.h> |
19 | #include <linux/wait.h> | |
20 | #include <linux/mm.h> | |
21 | ||
a7455442 GB |
22 | /* |
23 | * This is the RPC server thread function prototype | |
24 | */ | |
9867d76c | 25 | typedef int (*svc_thread_fn)(void *); |
3262c816 | 26 | |
03cf6c9f GB |
27 | /* statistics for svc_pool structures */ |
28 | struct svc_pool_stats { | |
403c7b44 | 29 | atomic_long_t packets; |
03cf6c9f | 30 | unsigned long sockets_queued; |
403c7b44 JL |
31 | atomic_long_t threads_woken; |
32 | atomic_long_t threads_timedout; | |
03cf6c9f GB |
33 | }; |
34 | ||
3262c816 GB |
35 | /* |
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 | */ | |
45 | struct svc_pool { | |
46 | unsigned int sp_id; /* pool id; also node id on NUMA */ | |
47 | spinlock_t sp_lock; /* protects all fields */ | |
3262c816 GB |
48 | struct list_head sp_sockets; /* pending sockets */ |
49 | unsigned int sp_nrthreads; /* # of threads in pool */ | |
a7455442 | 50 | struct list_head sp_all_threads; /* all server threads */ |
03cf6c9f | 51 | struct svc_pool_stats sp_stats; /* statistics on pool operation */ |
4d5db3f5 JL |
52 | #define SP_TASK_PENDING (0) /* still work to do even if no |
53 | * xprt is queued. */ | |
54 | unsigned long sp_flags; | |
3262c816 GB |
55 | } ____cacheline_aligned_in_smp; |
56 | ||
ea126e74 JL |
57 | struct svc_serv; |
58 | ||
59 | struct svc_serv_ops { | |
60 | /* Callback to use when last thread exits. */ | |
61 | void (*svo_shutdown)(struct svc_serv *serv, struct net *net); | |
62 | }; | |
63 | ||
1da177e4 LT |
64 | /* |
65 | * RPC service. | |
66 | * | |
67 | * An RPC service is a ``daemon,'' possibly multithreaded, which | |
68 | * receives and processes incoming RPC messages. | |
69 | * It has one or more transport sockets associated with it, and maintains | |
70 | * a list of idle threads waiting for input. | |
71 | * | |
72 | * We currently do not support more than one RPC program per daemon. | |
73 | */ | |
74 | struct svc_serv { | |
1da177e4 LT |
75 | struct svc_program * sv_program; /* RPC program */ |
76 | struct svc_stat * sv_stats; /* RPC statistics */ | |
77 | spinlock_t sv_lock; | |
78 | unsigned int sv_nrthreads; /* # of server threads */ | |
c9233eb7 JL |
79 | unsigned int sv_maxconn; /* max connections allowed or |
80 | * '0' causing max to be based | |
81 | * on number of threads. */ | |
82 | ||
c6b0a9f8 N |
83 | unsigned int sv_max_payload; /* datagram payload size */ |
84 | unsigned int sv_max_mesg; /* max_payload + 1 page for overheads */ | |
1da177e4 | 85 | unsigned int sv_xdrsize; /* XDR buffer size */ |
1da177e4 LT |
86 | struct list_head sv_permsocks; /* all permanent sockets */ |
87 | struct list_head sv_tempsocks; /* all temporary sockets */ | |
88 | int sv_tmpcnt; /* count of temporary sockets */ | |
36bdfc8b | 89 | struct timer_list sv_temptimer; /* timer for aging temporary sockets */ |
1da177e4 LT |
90 | |
91 | char * sv_name; /* service name */ | |
bc591ccf | 92 | |
3262c816 GB |
93 | unsigned int sv_nrpools; /* number of thread pools */ |
94 | struct svc_pool * sv_pools; /* array of thread pools */ | |
ea126e74 | 95 | struct svc_serv_ops *sv_ops; /* server operations */ |
a7455442 GB |
96 | struct module * sv_module; /* optional module to count when |
97 | * adding threads */ | |
98 | svc_thread_fn sv_function; /* main function for threads */ | |
9e00abc3 | 99 | #if defined(CONFIG_SUNRPC_BACKCHANNEL) |
56632b5b RL |
100 | struct list_head sv_cb_list; /* queue for callback requests |
101 | * that arrive over the same | |
102 | * connection */ | |
103 | spinlock_t sv_cb_lock; /* protects the svc_cb_list */ | |
104 | wait_queue_head_t sv_cb_waitq; /* sleep here if there are no | |
105 | * entries in the svc_cb_list */ | |
4a19de0f | 106 | struct svc_xprt *sv_bc_xprt; /* callback on fore channel */ |
9e00abc3 | 107 | #endif /* CONFIG_SUNRPC_BACKCHANNEL */ |
1da177e4 LT |
108 | }; |
109 | ||
9a24ab57 GB |
110 | /* |
111 | * We use sv_nrthreads as a reference count. svc_destroy() drops | |
112 | * this refcount, so we need to bump it up around operations that | |
113 | * change the number of threads. Horrible, but there it is. | |
3c519914 | 114 | * Should be called with the "service mutex" held. |
9a24ab57 GB |
115 | */ |
116 | static inline void svc_get(struct svc_serv *serv) | |
117 | { | |
118 | serv->sv_nrthreads++; | |
119 | } | |
120 | ||
1da177e4 LT |
121 | /* |
122 | * Maximum payload size supported by a kernel RPC server. | |
123 | * This is use to determine the max number of pages nfsd is | |
124 | * willing to return in a single READ operation. | |
7adae489 GB |
125 | * |
126 | * These happen to all be powers of 2, which is not strictly | |
127 | * necessary but helps enforce the real limitation, which is | |
128 | * that they should be multiples of PAGE_CACHE_SIZE. | |
129 | * | |
130 | * For UDP transports, a block plus NFS,RPC, and UDP headers | |
131 | * has to fit into the IP datagram limit of 64K. The largest | |
132 | * feasible number for all known page sizes is probably 48K, | |
133 | * but we choose 32K here. This is the same as the historical | |
134 | * Linux limit; someone who cares more about NFS/UDP performance | |
135 | * can test a larger number. | |
136 | * | |
137 | * For TCP transports we have more freedom. A size of 1MB is | |
138 | * chosen to match the client limit. Other OSes are known to | |
139 | * have larger limits, but those numbers are probably beyond | |
140 | * the point of diminishing returns. | |
1da177e4 | 141 | */ |
7adae489 GB |
142 | #define RPCSVC_MAXPAYLOAD (1*1024*1024u) |
143 | #define RPCSVC_MAXPAYLOAD_TCP RPCSVC_MAXPAYLOAD | |
144 | #define RPCSVC_MAXPAYLOAD_UDP (32*1024u) | |
145 | ||
146 | extern u32 svc_max_payload(const struct svc_rqst *rqstp); | |
1da177e4 LT |
147 | |
148 | /* | |
149 | * RPC Requsts and replies are stored in one or more pages. | |
150 | * We maintain an array of pages for each server thread. | |
151 | * Requests are copied into these pages as they arrive. Remaining | |
152 | * pages are available to write the reply into. | |
153 | * | |
154 | * Pages are sent using ->sendpage so each server thread needs to | |
155 | * allocate more to replace those used in sending. To help keep track | |
156 | * of these pages we have a receive list where all pages initialy live, | |
157 | * and a send list where pages are moved to when there are to be part | |
158 | * of a reply. | |
159 | * | |
160 | * We use xdr_buf for holding responses as it fits well with NFS | |
161 | * read responses (that have a header, and some data pages, and possibly | |
162 | * a tail) and means we can share some client side routines. | |
163 | * | |
164 | * The xdr_buf.head kvec always points to the first page in the rq_*pages | |
165 | * list. The xdr_buf.pages pointer points to the second page on that | |
166 | * list. xdr_buf.tail points to the end of the first page. | |
167 | * This assumes that the non-page part of an rpc reply will fit | |
168 | * in a page - NFSd ensures this. lockd also has no trouble. | |
169 | * | |
170 | * Each request/reply pair can have at most one "payload", plus two pages, | |
171 | * one for the request, and one for the reply. | |
250f3915 N |
172 | * We using ->sendfile to return read data, we might need one extra page |
173 | * if the request is not page-aligned. So add another '1'. | |
1da177e4 | 174 | */ |
250f3915 N |
175 | #define RPCSVC_MAXPAGES ((RPCSVC_MAXPAYLOAD+PAGE_SIZE-1)/PAGE_SIZE \ |
176 | + 2 + 1) | |
1da177e4 | 177 | |
76994313 | 178 | static inline u32 svc_getnl(struct kvec *iov) |
1da177e4 | 179 | { |
76994313 | 180 | __be32 val, *vp; |
1da177e4 LT |
181 | vp = iov->iov_base; |
182 | val = *vp++; | |
183 | iov->iov_base = (void*)vp; | |
76994313 AD |
184 | iov->iov_len -= sizeof(__be32); |
185 | return ntohl(val); | |
186 | } | |
187 | ||
188 | static inline void svc_putnl(struct kvec *iov, u32 val) | |
189 | { | |
190 | __be32 *vp = iov->iov_base + iov->iov_len; | |
191 | *vp = htonl(val); | |
192 | iov->iov_len += sizeof(__be32); | |
193 | } | |
194 | ||
195 | static inline __be32 svc_getu32(struct kvec *iov) | |
196 | { | |
197 | __be32 val, *vp; | |
198 | vp = iov->iov_base; | |
199 | val = *vp++; | |
200 | iov->iov_base = (void*)vp; | |
201 | iov->iov_len -= sizeof(__be32); | |
1da177e4 LT |
202 | return val; |
203 | } | |
204 | ||
205 | static inline void svc_ungetu32(struct kvec *iov) | |
206 | { | |
76994313 | 207 | __be32 *vp = (__be32 *)iov->iov_base; |
1da177e4 LT |
208 | iov->iov_base = (void *)(vp - 1); |
209 | iov->iov_len += sizeof(*vp); | |
210 | } | |
211 | ||
76994313 | 212 | static inline void svc_putu32(struct kvec *iov, __be32 val) |
1da177e4 | 213 | { |
76994313 | 214 | __be32 *vp = iov->iov_base + iov->iov_len; |
1da177e4 | 215 | *vp = val; |
76994313 | 216 | iov->iov_len += sizeof(__be32); |
1da177e4 LT |
217 | } |
218 | ||
1da177e4 LT |
219 | /* |
220 | * The context of a single thread, including the request currently being | |
221 | * processed. | |
1da177e4 LT |
222 | */ |
223 | struct svc_rqst { | |
a7455442 | 224 | struct list_head rq_all; /* all threads list */ |
81244386 | 225 | struct rcu_head rq_rcu_head; /* for RCU deferred kfree */ |
57b1d3ba | 226 | struct svc_xprt * rq_xprt; /* transport ptr */ |
849a1cf1 | 227 | |
27459f09 CL |
228 | struct sockaddr_storage rq_addr; /* peer address */ |
229 | size_t rq_addrlen; | |
849a1cf1 MJ |
230 | struct sockaddr_storage rq_daddr; /* dest addr of request |
231 | * - reply from here */ | |
232 | size_t rq_daddrlen; | |
1da177e4 LT |
233 | |
234 | struct svc_serv * rq_server; /* RPC service definition */ | |
3262c816 | 235 | struct svc_pool * rq_pool; /* thread pool */ |
1da177e4 LT |
236 | struct svc_procedure * rq_procinfo; /* procedure info */ |
237 | struct auth_ops * rq_authop; /* authentication flavour */ | |
238 | struct svc_cred rq_cred; /* auth info */ | |
5148bf4e | 239 | void * rq_xprt_ctxt; /* transport specific context ptr */ |
1da177e4 LT |
240 | struct svc_deferred_req*rq_deferred; /* deferred request we are replaying */ |
241 | ||
260c1d12 | 242 | size_t rq_xprt_hlen; /* xprt header len */ |
1da177e4 LT |
243 | struct xdr_buf rq_arg; |
244 | struct xdr_buf rq_res; | |
44524359 N |
245 | struct page * rq_pages[RPCSVC_MAXPAGES]; |
246 | struct page * *rq_respages; /* points into rq_pages */ | |
afc59400 | 247 | struct page * *rq_next_page; /* next reply page to use */ |
2825a7f9 | 248 | struct page * *rq_page_end; /* one past the last page */ |
1da177e4 | 249 | |
3cc03b16 N |
250 | struct kvec rq_vec[RPCSVC_MAXPAGES]; /* generally useful.. */ |
251 | ||
d8ed029d | 252 | __be32 rq_xid; /* transmission id */ |
1da177e4 LT |
253 | u32 rq_prog; /* program number */ |
254 | u32 rq_vers; /* program version */ | |
255 | u32 rq_proc; /* procedure number */ | |
256 | u32 rq_prot; /* IP protocol */ | |
62978b3c | 257 | int rq_cachetype; /* catering to nfsd */ |
4d152e2c | 258 | #define RQ_SECURE (0) /* secure port */ |
7501cc2b | 259 | #define RQ_LOCAL (1) /* local request */ |
30660e04 | 260 | #define RQ_USEDEFERRAL (2) /* use deferral */ |
78b65eb3 | 261 | #define RQ_DROPME (3) /* drop current reply */ |
779fb0f3 JL |
262 | #define RQ_SPLICE_OK (4) /* turned off in gss privacy |
263 | * to prevent encrypting page | |
264 | * cache pages */ | |
81244386 | 265 | #define RQ_VICTIM (5) /* about to be shut down */ |
b1691bc0 | 266 | #define RQ_BUSY (6) /* request is busy */ |
4d152e2c | 267 | unsigned long rq_flags; /* flags field */ |
1da177e4 | 268 | |
1da177e4 LT |
269 | void * rq_argp; /* decoded arguments */ |
270 | void * rq_resp; /* xdr'd results */ | |
271 | void * rq_auth_data; /* flavor-specific data */ | |
a5cddc88 BF |
272 | int rq_auth_slack; /* extra space xdr code |
273 | * should leave in head | |
274 | * for krb5i, krb5p. | |
275 | */ | |
1da177e4 LT |
276 | int rq_reserved; /* space on socket outq |
277 | * reserved for this request | |
278 | */ | |
279 | ||
280 | struct cache_req rq_chandle; /* handle passed to caches for | |
281 | * request delaying | |
282 | */ | |
283 | /* Catering to nfsd */ | |
284 | struct auth_domain * rq_client; /* RPC peer info */ | |
3ab4d8b1 | 285 | struct auth_domain * rq_gssclient; /* "gss/"-style peer info */ |
1da177e4 | 286 | struct svc_cacherep * rq_cacherep; /* cache info */ |
a7455442 | 287 | struct task_struct *rq_task; /* service thread */ |
b1691bc0 | 288 | spinlock_t rq_lock; /* per-request lock */ |
1da177e4 LT |
289 | }; |
290 | ||
9695c705 SK |
291 | #define SVC_NET(svc_rqst) (svc_rqst->rq_xprt->xpt_net) |
292 | ||
27459f09 CL |
293 | /* |
294 | * Rigorous type checking on sockaddr type conversions | |
295 | */ | |
5344b12d | 296 | static inline struct sockaddr_in *svc_addr_in(const struct svc_rqst *rqst) |
27459f09 CL |
297 | { |
298 | return (struct sockaddr_in *) &rqst->rq_addr; | |
299 | } | |
300 | ||
5344b12d | 301 | static inline struct sockaddr_in6 *svc_addr_in6(const struct svc_rqst *rqst) |
95756482 CL |
302 | { |
303 | return (struct sockaddr_in6 *) &rqst->rq_addr; | |
304 | } | |
305 | ||
5344b12d | 306 | static inline struct sockaddr *svc_addr(const struct svc_rqst *rqst) |
27459f09 CL |
307 | { |
308 | return (struct sockaddr *) &rqst->rq_addr; | |
309 | } | |
310 | ||
849a1cf1 MJ |
311 | static inline struct sockaddr_in *svc_daddr_in(const struct svc_rqst *rqst) |
312 | { | |
313 | return (struct sockaddr_in *) &rqst->rq_daddr; | |
314 | } | |
315 | ||
316 | static inline struct sockaddr_in6 *svc_daddr_in6(const struct svc_rqst *rqst) | |
317 | { | |
318 | return (struct sockaddr_in6 *) &rqst->rq_daddr; | |
319 | } | |
320 | ||
321 | static inline struct sockaddr *svc_daddr(const struct svc_rqst *rqst) | |
322 | { | |
323 | return (struct sockaddr *) &rqst->rq_daddr; | |
324 | } | |
325 | ||
1da177e4 LT |
326 | /* |
327 | * Check buffer bounds after decoding arguments | |
328 | */ | |
329 | static inline int | |
d8ed029d | 330 | xdr_argsize_check(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 LT |
331 | { |
332 | char *cp = (char *)p; | |
333 | struct kvec *vec = &rqstp->rq_arg.head[0]; | |
0ba7536d N |
334 | return cp >= (char*)vec->iov_base |
335 | && cp <= (char*)vec->iov_base + vec->iov_len; | |
1da177e4 LT |
336 | } |
337 | ||
338 | static inline int | |
d8ed029d | 339 | xdr_ressize_check(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 LT |
340 | { |
341 | struct kvec *vec = &rqstp->rq_res.head[0]; | |
342 | char *cp = (char*)p; | |
343 | ||
344 | vec->iov_len = cp - (char*)vec->iov_base; | |
345 | ||
346 | return vec->iov_len <= PAGE_SIZE; | |
347 | } | |
348 | ||
44524359 | 349 | static inline void svc_free_res_pages(struct svc_rqst *rqstp) |
a257cdd0 | 350 | { |
afc59400 BF |
351 | while (rqstp->rq_next_page != rqstp->rq_respages) { |
352 | struct page **pp = --rqstp->rq_next_page; | |
44524359 N |
353 | if (*pp) { |
354 | put_page(*pp); | |
355 | *pp = NULL; | |
1da177e4 LT |
356 | } |
357 | } | |
358 | } | |
359 | ||
1da177e4 LT |
360 | struct svc_deferred_req { |
361 | u32 prot; /* protocol (UDP or TCP) */ | |
8c7b0172 | 362 | struct svc_xprt *xprt; |
24422222 CL |
363 | struct sockaddr_storage addr; /* where reply must go */ |
364 | size_t addrlen; | |
849a1cf1 MJ |
365 | struct sockaddr_storage daddr; /* where reply must come from */ |
366 | size_t daddrlen; | |
1da177e4 | 367 | struct cache_deferred_req handle; |
260c1d12 | 368 | size_t xprt_hlen; |
1da177e4 | 369 | int argslen; |
d8ed029d | 370 | __be32 args[0]; |
1da177e4 LT |
371 | }; |
372 | ||
373 | /* | |
9ba02638 | 374 | * List of RPC programs on the same transport endpoint |
1da177e4 LT |
375 | */ |
376 | struct svc_program { | |
9ba02638 | 377 | struct svc_program * pg_next; /* other programs (same xprt) */ |
1da177e4 LT |
378 | u32 pg_prog; /* program number */ |
379 | unsigned int pg_lovers; /* lowest version */ | |
28303ca3 | 380 | unsigned int pg_hivers; /* highest version */ |
1da177e4 LT |
381 | unsigned int pg_nvers; /* number of versions */ |
382 | struct svc_version ** pg_vers; /* version array */ | |
383 | char * pg_name; /* service name */ | |
384 | char * pg_class; /* class name: services sharing authentication */ | |
385 | struct svc_stat * pg_stats; /* rpc statistics */ | |
386 | int (*pg_authenticate)(struct svc_rqst *); | |
387 | }; | |
388 | ||
389 | /* | |
390 | * RPC program version | |
391 | */ | |
392 | struct svc_version { | |
393 | u32 vs_vers; /* version number */ | |
394 | u32 vs_nproc; /* number of procedures */ | |
395 | struct svc_procedure * vs_proc; /* per-procedure info */ | |
396 | u32 vs_xdrsize; /* xdrsize needed for this version */ | |
397 | ||
7e55b59b | 398 | unsigned int vs_hidden : 1, /* Don't register with portmapper. |
bc5fea42 | 399 | * Only used for nfsacl so far. */ |
7e55b59b KM |
400 | vs_rpcb_optnl:1;/* Don't care the result of register. |
401 | * Only used for nfsv4. */ | |
bc5fea42 | 402 | |
1da177e4 LT |
403 | /* Override dispatch function (e.g. when caching replies). |
404 | * A return value of 0 means drop the request. | |
405 | * vs_dispatch == NULL means use default dispatcher. | |
406 | */ | |
d8ed029d | 407 | int (*vs_dispatch)(struct svc_rqst *, __be32 *); |
1da177e4 LT |
408 | }; |
409 | ||
410 | /* | |
411 | * RPC procedure info | |
412 | */ | |
7111c66e | 413 | typedef __be32 (*svc_procfunc)(struct svc_rqst *, void *argp, void *resp); |
1da177e4 LT |
414 | struct svc_procedure { |
415 | svc_procfunc pc_func; /* process the request */ | |
416 | kxdrproc_t pc_decode; /* XDR decode args */ | |
417 | kxdrproc_t pc_encode; /* XDR encode result */ | |
418 | kxdrproc_t pc_release; /* XDR free result */ | |
419 | unsigned int pc_argsize; /* argument struct size */ | |
420 | unsigned int pc_ressize; /* result struct size */ | |
421 | unsigned int pc_count; /* call count */ | |
422 | unsigned int pc_cachetype; /* cache info (NFS) */ | |
423 | unsigned int pc_xdrressize; /* maximum size of XDR reply */ | |
424 | }; | |
425 | ||
1da177e4 LT |
426 | /* |
427 | * Function prototypes. | |
428 | */ | |
bb2224df | 429 | int svc_rpcb_setup(struct svc_serv *serv, struct net *net); |
5ecebb7c | 430 | void svc_rpcb_cleanup(struct svc_serv *serv, struct net *net); |
9793f7c8 | 431 | int svc_bind(struct svc_serv *serv, struct net *net); |
49a9072f | 432 | struct svc_serv *svc_create(struct svc_program *, unsigned int, |
ea126e74 | 433 | struct svc_serv_ops *); |
0113ab34 | 434 | struct svc_rqst *svc_prepare_thread(struct svc_serv *serv, |
11fd165c | 435 | struct svc_pool *pool, int node); |
1da177e4 | 436 | void svc_exit_thread(struct svc_rqst *); |
a7455442 | 437 | struct svc_serv * svc_create_pooled(struct svc_program *, unsigned int, |
ea126e74 | 438 | struct svc_serv_ops *, svc_thread_fn, struct module *); |
a7455442 | 439 | int svc_set_num_threads(struct svc_serv *, struct svc_pool *, int); |
03cf6c9f | 440 | int svc_pool_stats_open(struct svc_serv *serv, struct file *file); |
1da177e4 | 441 | void svc_destroy(struct svc_serv *); |
bb2224df | 442 | void svc_shutdown_net(struct svc_serv *, struct net *); |
6fb2b47f | 443 | int svc_process(struct svc_rqst *); |
4d6bbb62 RL |
444 | int bc_svc_process(struct svc_serv *, struct rpc_rqst *, |
445 | struct svc_rqst *); | |
5247fab5 | 446 | int svc_register(const struct svc_serv *, struct net *, const int, |
4b62e58c | 447 | const unsigned short, const unsigned short); |
a26cfad6 | 448 | |
1da177e4 LT |
449 | void svc_wake_up(struct svc_serv *); |
450 | void svc_reserve(struct svc_rqst *rqstp, int space); | |
bfd24160 | 451 | struct svc_pool * svc_pool_for_cpu(struct svc_serv *serv, int cpu); |
ad06e4bd CL |
452 | char * svc_print_addr(struct svc_rqst *, char *, size_t); |
453 | ||
454 | #define RPC_MAX_ADDRBUFLEN (63U) | |
1da177e4 | 455 | |
cd123012 JL |
456 | /* |
457 | * When we want to reduce the size of the reserved space in the response | |
458 | * buffer, we need to take into account the size of any checksum data that | |
459 | * may be at the end of the packet. This is difficult to determine exactly | |
460 | * for all cases without actually generating the checksum, so we just use a | |
461 | * static value. | |
462 | */ | |
fbb7878c | 463 | static inline void svc_reserve_auth(struct svc_rqst *rqstp, int space) |
cd123012 | 464 | { |
a5cddc88 | 465 | svc_reserve(rqstp, space + rqstp->rq_auth_slack); |
cd123012 JL |
466 | } |
467 | ||
1da177e4 | 468 | #endif /* SUNRPC_SVC_H */ |