/* * linux/include/linux/sunrpc/svc_xprt.h * * RPC server transport I/O */ #ifndef SUNRPC_SVC_XPRT_H #define SUNRPC_SVC_XPRT_H #include <linux/sunrpc/svc.h> #include <linux/module.h> struct svc_xprt_ops { struct svc_xprt *(*xpo_create)(struct svc_serv *, struct sockaddr *, int, int); struct svc_xprt *(*xpo_accept)(struct svc_xprt *); int (*xpo_has_wspace)(struct svc_xprt *); int (*xpo_recvfrom)(struct svc_rqst *); void (*xpo_prep_reply_hdr)(struct svc_rqst *); int (*xpo_sendto)(struct svc_rqst *); void (*xpo_release_rqst)(struct svc_rqst *); void (*xpo_detach)(struct svc_xprt *); void (*xpo_free)(struct svc_xprt *); }; struct svc_xprt_class { const char *xcl_name; struct module *xcl_owner; struct svc_xprt_ops *xcl_ops; struct list_head xcl_list; u32 xcl_max_payload; }; struct svc_xprt { struct svc_xprt_class *xpt_class; struct svc_xprt_ops *xpt_ops; struct kref xpt_ref; struct list_head xpt_list; struct list_head xpt_ready; unsigned long xpt_flags; #define XPT_BUSY 0 /* enqueued/receiving */ #define XPT_CONN 1 /* conn pending */ #define XPT_CLOSE 2 /* dead or dying */ #define XPT_DATA 3 /* data pending */ #define XPT_TEMP 4 /* connected transport */ #define XPT_DEAD 6 /* transport closed */ #define XPT_CHNGBUF 7 /* need to change snd/rcv buf sizes */ #define XPT_DEFERRED 8 /* deferred request pending */ #define XPT_OLD 9 /* used for xprt aging mark+sweep */ #define XPT_DETACHED 10 /* detached from tempsocks list */ #define XPT_LISTENER 11 /* listening endpoint */ #define XPT_CACHE_AUTH 12 /* cache auth info */ struct svc_pool *xpt_pool; /* current pool iff queued */ struct svc_serv *xpt_server; /* service for transport */ atomic_t xpt_reserved; /* space on outq that is rsvd */ struct mutex xpt_mutex; /* to serialize sending data */ spinlock_t xpt_lock; /* protects sk_deferred * and xpt_auth_cache */ void *xpt_auth_cache;/* auth cache */ struct list_head xpt_deferred; /* deferred requests that need * to be revisted */ struct sockaddr_storage xpt_local; /* local address */ size_t xpt_locallen; /* length of address */ struct sockaddr_storage xpt_remote; /* remote peer's address */ size_t xpt_remotelen; /* length of address */ }; int svc_reg_xprt_class(struct svc_xprt_class *); void svc_unreg_xprt_class(struct svc_xprt_class *); void svc_xprt_init(struct svc_xprt_class *, struct svc_xprt *, struct svc_serv *); int svc_create_xprt(struct svc_serv *, char *, unsigned short, int); void svc_xprt_enqueue(struct svc_xprt *xprt); void svc_xprt_received(struct svc_xprt *); void svc_xprt_put(struct svc_xprt *xprt); void svc_xprt_copy_addrs(struct svc_rqst *rqstp, struct svc_xprt *xprt); void svc_close_xprt(struct svc_xprt *xprt); void svc_delete_xprt(struct svc_xprt *xprt); int svc_port_is_privileged(struct sockaddr *sin); int svc_print_xprts(char *buf, int maxlen); struct svc_xprt *svc_find_xprt(struct svc_serv *, char *, int, int); int svc_xprt_names(struct svc_serv *serv, char *buf, int buflen); static inline void svc_xprt_get(struct svc_xprt *xprt) { kref_get(&xprt->xpt_ref); } static inline void svc_xprt_set_local(struct svc_xprt *xprt, struct sockaddr *sa, int salen) { memcpy(&xprt->xpt_local, sa, salen); xprt->xpt_locallen = salen; } static inline void svc_xprt_set_remote(struct svc_xprt *xprt, struct sockaddr *sa, int salen) { memcpy(&xprt->xpt_remote, sa, salen); xprt->xpt_remotelen = salen; } static inline unsigned short svc_addr_port(struct sockaddr *sa) { unsigned short ret = 0; switch (sa->sa_family) { case AF_INET: ret = ntohs(((struct sockaddr_in *)sa)->sin_port); break; case AF_INET6: ret = ntohs(((struct sockaddr_in6 *)sa)->sin6_port); break; } return ret; } static inline size_t svc_addr_len(struct sockaddr *sa) { switch (sa->sa_family) { case AF_INET: return sizeof(struct sockaddr_in); case AF_INET6: return sizeof(struct sockaddr_in6); } return -EAFNOSUPPORT; } static inline unsigned short svc_xprt_local_port(struct svc_xprt *xprt) { return svc_addr_port((struct sockaddr *)&xprt->xpt_local); } static inline unsigned short svc_xprt_remote_port(struct svc_xprt *xprt) { return svc_addr_port((struct sockaddr *)&xprt->xpt_remote); } static inline char *__svc_print_addr(struct sockaddr *addr, char *buf, size_t len) { switch (addr->sa_family) { case AF_INET: snprintf(buf, len, "%u.%u.%u.%u, port=%u", NIPQUAD(((struct sockaddr_in *) addr)->sin_addr), ntohs(((struct sockaddr_in *) addr)->sin_port)); break; case AF_INET6: snprintf(buf, len, "%x:%x:%x:%x:%x:%x:%x:%x, port=%u", NIP6(((struct sockaddr_in6 *) addr)->sin6_addr), ntohs(((struct sockaddr_in6 *) addr)->sin6_port)); break; default: snprintf(buf, len, "unknown address type: %d", addr->sa_family); break; } return buf; } #endif /* SUNRPC_SVC_XPRT_H */