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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 /* For sends (protected by xpt_mutex) */
30 struct bio_vec *sk_bvec;
31
32 /* private TCP part */
33 /* On-the-wire fragment header: */
34 __be32 sk_marker;
35 /* As we receive a record, this includes the length received so
36 * far (including the fragment header): */
37 u32 sk_tcplen;
38 /* Total length of the data (not including fragment headers)
39 * received so far in the fragments making up this rpc: */
40 u32 sk_datalen;
41
42 struct page_frag_cache sk_frag_cache;
43
44 struct completion sk_handshake_done;
45
46 /* received data */
47 unsigned long sk_maxpages;
48 struct page * sk_pages[] __counted_by(sk_maxpages);
49};
50
51static inline u32 svc_sock_reclen(struct svc_sock *svsk)
52{
53 return be32_to_cpu(svsk->sk_marker) & RPC_FRAGMENT_SIZE_MASK;
54}
55
56static inline u32 svc_sock_final_rec(struct svc_sock *svsk)
57{
58 return be32_to_cpu(svsk->sk_marker) & RPC_LAST_STREAM_FRAGMENT;
59}
60
61/*
62 * Function prototypes.
63 */
64void svc_recv(struct svc_rqst *rqstp);
65void svc_send(struct svc_rqst *rqstp);
66int svc_addsock(struct svc_serv *serv, struct net *net,
67 const int fd, char *name_return, const size_t len,
68 const struct cred *cred);
69void svc_init_xprt_sock(void);
70void svc_cleanup_xprt_sock(void);
71
72/*
73 * svc_makesock socket characteristics
74 */
75#define SVC_SOCK_DEFAULTS (0U)
76#define SVC_SOCK_ANONYMOUS (1U << 0) /* don't register with pmap */
77#define SVC_SOCK_TEMPORARY (1U << 1) /* flag socket as temporary */
78
79#endif /* SUNRPC_SVCSOCK_H */