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/*
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* linux/include/linux/sunrpc/svc_xprt.h
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*
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* RPC server transport I/O
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*/
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#ifndef SUNRPC_SVC_XPRT_H
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#define SUNRPC_SVC_XPRT_H
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#include <linux/sunrpc/svc.h>
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#include <linux/module.h>
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struct svc_xprt_ops {
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struct svc_xprt *(*xpo_create)(struct svc_serv *,
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struct sockaddr *, int,
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int);
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struct svc_xprt *(*xpo_accept)(struct svc_xprt *);
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int (*xpo_has_wspace)(struct svc_xprt *);
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int (*xpo_recvfrom)(struct svc_rqst *);
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void (*xpo_prep_reply_hdr)(struct svc_rqst *);
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int (*xpo_sendto)(struct svc_rqst *);
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void (*xpo_release_rqst)(struct svc_rqst *);
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void (*xpo_detach)(struct svc_xprt *);
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void (*xpo_free)(struct svc_xprt *);
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};
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struct svc_xprt_class {
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const char *xcl_name;
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struct module *xcl_owner;
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struct svc_xprt_ops *xcl_ops;
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struct list_head xcl_list;
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u32 xcl_max_payload;
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};
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struct svc_xprt {
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struct svc_xprt_class *xpt_class;
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struct svc_xprt_ops *xpt_ops;
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struct kref xpt_ref;
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struct list_head xpt_list;
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struct list_head xpt_ready;
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unsigned long xpt_flags;
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#define XPT_BUSY 0 /* enqueued/receiving */
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#define XPT_CONN 1 /* conn pending */
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#define XPT_CLOSE 2 /* dead or dying */
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#define XPT_DATA 3 /* data pending */
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#define XPT_TEMP 4 /* connected transport */
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#define XPT_DEAD 6 /* transport closed */
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#define XPT_CHNGBUF 7 /* need to change snd/rcv buf sizes */
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#define XPT_DEFERRED 8 /* deferred request pending */
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#define XPT_OLD 9 /* used for xprt aging mark+sweep */
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#define XPT_DETACHED 10 /* detached from tempsocks list */
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#define XPT_LISTENER 11 /* listening endpoint */
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#define XPT_CACHE_AUTH 12 /* cache auth info */
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struct svc_pool *xpt_pool; /* current pool iff queued */
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struct svc_serv *xpt_server; /* service for transport */
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atomic_t xpt_reserved; /* space on outq that is rsvd */
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struct mutex xpt_mutex; /* to serialize sending data */
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spinlock_t xpt_lock; /* protects sk_deferred
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* and xpt_auth_cache */
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void *xpt_auth_cache;/* auth cache */
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struct list_head xpt_deferred; /* deferred requests that need
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* to be revisted */
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struct sockaddr_storage xpt_local; /* local address */
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size_t xpt_locallen; /* length of address */
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struct sockaddr_storage xpt_remote; /* remote peer's address */
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size_t xpt_remotelen; /* length of address */
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};
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int svc_reg_xprt_class(struct svc_xprt_class *);
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void svc_unreg_xprt_class(struct svc_xprt_class *);
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void svc_xprt_init(struct svc_xprt_class *, struct svc_xprt *,
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struct svc_serv *);
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int svc_create_xprt(struct svc_serv *, char *, unsigned short, int);
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void svc_xprt_received(struct svc_xprt *);
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void svc_xprt_put(struct svc_xprt *xprt);
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void svc_xprt_copy_addrs(struct svc_rqst *rqstp, struct svc_xprt *xprt);
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static inline void svc_xprt_get(struct svc_xprt *xprt)
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{
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kref_get(&xprt->xpt_ref);
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}
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static inline void svc_xprt_set_local(struct svc_xprt *xprt,
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struct sockaddr *sa, int salen)
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{
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memcpy(&xprt->xpt_local, sa, salen);
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xprt->xpt_locallen = salen;
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}
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static inline void svc_xprt_set_remote(struct svc_xprt *xprt,
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struct sockaddr *sa, int salen)
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{
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memcpy(&xprt->xpt_remote, sa, salen);
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xprt->xpt_remotelen = salen;
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}
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static inline unsigned short svc_addr_port(struct sockaddr *sa)
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{
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unsigned short ret = 0;
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switch (sa->sa_family) {
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case AF_INET:
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ret = ntohs(((struct sockaddr_in *)sa)->sin_port);
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break;
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case AF_INET6:
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ret = ntohs(((struct sockaddr_in6 *)sa)->sin6_port);
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break;
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}
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return ret;
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}
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static inline size_t svc_addr_len(struct sockaddr *sa)
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{
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switch (sa->sa_family) {
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case AF_INET:
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return sizeof(struct sockaddr_in);
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case AF_INET6:
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return sizeof(struct sockaddr_in6);
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}
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return -EAFNOSUPPORT;
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}
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static inline unsigned short svc_xprt_local_port(struct svc_xprt *xprt)
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{
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return svc_addr_port((struct sockaddr *)&xprt->xpt_local);
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}
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static inline unsigned short svc_xprt_remote_port(struct svc_xprt *xprt)
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{
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return svc_addr_port((struct sockaddr *)&xprt->xpt_remote);
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}
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#endif /* SUNRPC_SVC_XPRT_H */
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