2 * linux/include/linux/sunrpc/svc_xprt.h
4 * RPC server transport I/O
7 #ifndef SUNRPC_SVC_XPRT_H
8 #define SUNRPC_SVC_XPRT_H
10 #include <linux/sunrpc/svc.h>
11 #include <linux/module.h>
14 struct svc_xprt *(*xpo_create)(struct svc_serv *,
16 struct sockaddr *, int,
18 struct svc_xprt *(*xpo_accept)(struct svc_xprt *);
19 int (*xpo_has_wspace)(struct svc_xprt *);
20 int (*xpo_recvfrom)(struct svc_rqst *);
21 void (*xpo_prep_reply_hdr)(struct svc_rqst *);
22 int (*xpo_sendto)(struct svc_rqst *);
23 void (*xpo_release_rqst)(struct svc_rqst *);
24 void (*xpo_detach)(struct svc_xprt *);
25 void (*xpo_free)(struct svc_xprt *);
28 struct svc_xprt_class {
30 struct module *xcl_owner;
31 struct svc_xprt_ops *xcl_ops;
32 struct list_head xcl_list;
37 struct svc_xprt_class *xpt_class;
38 struct svc_xprt_ops *xpt_ops;
40 struct list_head xpt_list;
41 struct list_head xpt_ready;
42 unsigned long xpt_flags;
43 #define XPT_BUSY 0 /* enqueued/receiving */
44 #define XPT_CONN 1 /* conn pending */
45 #define XPT_CLOSE 2 /* dead or dying */
46 #define XPT_DATA 3 /* data pending */
47 #define XPT_TEMP 4 /* connected transport */
48 #define XPT_DEAD 6 /* transport closed */
49 #define XPT_CHNGBUF 7 /* need to change snd/rcv buf sizes */
50 #define XPT_DEFERRED 8 /* deferred request pending */
51 #define XPT_OLD 9 /* used for xprt aging mark+sweep */
52 #define XPT_DETACHED 10 /* detached from tempsocks list */
53 #define XPT_LISTENER 11 /* listening endpoint */
54 #define XPT_CACHE_AUTH 12 /* cache auth info */
56 struct svc_pool *xpt_pool; /* current pool iff queued */
57 struct svc_serv *xpt_server; /* service for transport */
58 atomic_t xpt_reserved; /* space on outq that is rsvd */
59 struct mutex xpt_mutex; /* to serialize sending data */
60 spinlock_t xpt_lock; /* protects sk_deferred
61 * and xpt_auth_cache */
62 void *xpt_auth_cache;/* auth cache */
63 struct list_head xpt_deferred; /* deferred requests that need
65 struct sockaddr_storage xpt_local; /* local address */
66 size_t xpt_locallen; /* length of address */
67 struct sockaddr_storage xpt_remote; /* remote peer's address */
68 size_t xpt_remotelen; /* length of address */
69 struct rpc_wait_queue xpt_bc_pending; /* backchannel wait queue */
74 int svc_reg_xprt_class(struct svc_xprt_class *);
75 void svc_unreg_xprt_class(struct svc_xprt_class *);
76 void svc_xprt_init(struct svc_xprt_class *, struct svc_xprt *,
78 int svc_create_xprt(struct svc_serv *, const char *, struct net *,
79 const int, const unsigned short, int);
80 void svc_xprt_enqueue(struct svc_xprt *xprt);
81 void svc_xprt_received(struct svc_xprt *);
82 void svc_xprt_put(struct svc_xprt *xprt);
83 void svc_xprt_copy_addrs(struct svc_rqst *rqstp, struct svc_xprt *xprt);
84 void svc_close_xprt(struct svc_xprt *xprt);
85 void svc_delete_xprt(struct svc_xprt *xprt);
86 int svc_port_is_privileged(struct sockaddr *sin);
87 int svc_print_xprts(char *buf, int maxlen);
88 struct svc_xprt *svc_find_xprt(struct svc_serv *serv, const char *xcl_name,
89 const sa_family_t af, const unsigned short port);
90 int svc_xprt_names(struct svc_serv *serv, char *buf, const int buflen);
92 static inline void svc_xprt_get(struct svc_xprt *xprt)
94 kref_get(&xprt->xpt_ref);
96 static inline void svc_xprt_set_local(struct svc_xprt *xprt,
97 const struct sockaddr *sa,
100 memcpy(&xprt->xpt_local, sa, salen);
101 xprt->xpt_locallen = salen;
103 static inline void svc_xprt_set_remote(struct svc_xprt *xprt,
104 const struct sockaddr *sa,
107 memcpy(&xprt->xpt_remote, sa, salen);
108 xprt->xpt_remotelen = salen;
110 static inline unsigned short svc_addr_port(const struct sockaddr *sa)
112 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
113 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)sa;
115 switch (sa->sa_family) {
117 return ntohs(sin->sin_port);
119 return ntohs(sin6->sin6_port);
125 static inline size_t svc_addr_len(const struct sockaddr *sa)
127 switch (sa->sa_family) {
129 return sizeof(struct sockaddr_in);
131 return sizeof(struct sockaddr_in6);
137 static inline unsigned short svc_xprt_local_port(const struct svc_xprt *xprt)
139 return svc_addr_port((const struct sockaddr *)&xprt->xpt_local);
142 static inline unsigned short svc_xprt_remote_port(const struct svc_xprt *xprt)
144 return svc_addr_port((const struct sockaddr *)&xprt->xpt_remote);
147 static inline char *__svc_print_addr(const struct sockaddr *addr,
148 char *buf, const size_t len)
150 const struct sockaddr_in *sin = (const struct sockaddr_in *)addr;
151 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)addr;
153 switch (addr->sa_family) {
155 snprintf(buf, len, "%pI4, port=%u", &sin->sin_addr,
156 ntohs(sin->sin_port));
160 snprintf(buf, len, "%pI6, port=%u",
162 ntohs(sin6->sin6_port));
166 snprintf(buf, len, "unknown address type: %d", addr->sa_family);
172 #endif /* SUNRPC_SVC_XPRT_H */