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 /* 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 svc_sock_reclen(struct svc_sock * svsk)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 svc_sock_final_rec(struct svc_sock * svsk)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 */ 64 void svc_recv(struct svc_rqst *rqstp); 65 void svc_send(struct svc_rqst *rqstp); 66 int 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); 69 void svc_init_xprt_sock(void); 70 void 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 */ 80