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 */ 19 struct 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 39 struct page_frag_cache sk_frag_cache; 40 41 struct completion sk_handshake_done; 42 43 /* received data */ 44 unsigned long sk_maxpages; 45 struct page * sk_pages[] __counted_by(sk_maxpages); 46 }; 47 48 static inline u32 svc_sock_reclen(struct svc_sock *svsk) 49 { 50 return be32_to_cpu(svsk->sk_marker) & RPC_FRAGMENT_SIZE_MASK; 51 } 52 53 static inline u32 svc_sock_final_rec(struct svc_sock *svsk) 54 { 55 return be32_to_cpu(svsk->sk_marker) & RPC_LAST_STREAM_FRAGMENT; 56 } 57 58 /* 59 * Function prototypes. 60 */ 61 void svc_recv(struct svc_rqst *rqstp); 62 void svc_send(struct svc_rqst *rqstp); 63 int svc_addsock(struct svc_serv *serv, struct net *net, 64 const int fd, char *name_return, const size_t len, 65 const struct cred *cred); 66 void svc_init_xprt_sock(void); 67 void svc_cleanup_xprt_sock(void); 68 69 /* 70 * svc_makesock socket characteristics 71 */ 72 #define SVC_SOCK_DEFAULTS (0U) 73 #define SVC_SOCK_ANONYMOUS (1U << 0) /* don't register with pmap */ 74 #define SVC_SOCK_TEMPORARY (1U << 1) /* flag socket as temporary */ 75 76 #endif /* SUNRPC_SVCSOCK_H */ 77