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1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * linux/include/linux/sunrpc/svcsock.h
4 *
5 * RPC server socket I/O.
6 *
7 * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
8 */
9
10#ifndef SUNRPC_SVCSOCK_H
11#define SUNRPC_SVCSOCK_H
12
13#include <linux/sunrpc/svc.h>
14#include <linux/sunrpc/svc_xprt.h>
15
16/*
17 * RPC server socket.
18 */
19struct svc_sock {
20 struct svc_xprt sk_xprt;
21 struct socket * sk_sock; /* berkeley socket layer */
22 struct sock * sk_sk; /* INET layer */
23
24 /* We keep the old state_change and data_ready CB's here */
25 void (*sk_ostate)(struct sock *);
26 void (*sk_odata)(struct sock *);
27 void (*sk_owspace)(struct sock *);
28
29 /* private TCP part */
30 /* On-the-wire fragment header: */
31 __be32 sk_marker;
32 /* As we receive a record, this includes the length received so
33 * far (including the fragment header): */
34 u32 sk_tcplen;
35 /* Total length of the data (not including fragment headers)
36 * received so far in the fragments making up this rpc: */
37 u32 sk_datalen;
38 /* Number of queued send requests */
39 atomic_t sk_sendqlen;
40
41 struct page * sk_pages[RPCSVC_MAXPAGES]; /* received data */
42};
43
44static inline u32 svc_sock_reclen(struct svc_sock *svsk)
45{
46 return be32_to_cpu(svsk->sk_marker) & RPC_FRAGMENT_SIZE_MASK;
47}
48
49static inline u32 svc_sock_final_rec(struct svc_sock *svsk)
50{
51 return be32_to_cpu(svsk->sk_marker) & RPC_LAST_STREAM_FRAGMENT;
52}
53
54/*
55 * Function prototypes.
56 */
57void svc_close_net(struct svc_serv *, struct net *);
58int svc_recv(struct svc_rqst *, long);
59int svc_send(struct svc_rqst *);
60void svc_drop(struct svc_rqst *);
61void svc_sock_update_bufs(struct svc_serv *serv);
62bool svc_alien_sock(struct net *net, int fd);
63int svc_addsock(struct svc_serv *serv, const int fd,
64 char *name_return, const size_t len,
65 const struct cred *cred);
66void svc_init_xprt_sock(void);
67void svc_cleanup_xprt_sock(void);
68struct svc_xprt *svc_sock_create(struct svc_serv *serv, int prot);
69void svc_sock_destroy(struct svc_xprt *);
70
71/*
72 * svc_makesock socket characteristics
73 */
74#define SVC_SOCK_DEFAULTS (0U)
75#define SVC_SOCK_ANONYMOUS (1U << 0) /* don't register with pmap */
76#define SVC_SOCK_TEMPORARY (1U << 1) /* flag socket as temporary */
77
78#endif /* SUNRPC_SVCSOCK_H */