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1/*
2 * linux/include/linux/sunrpc/svc_xprt.h
3 *
4 * RPC server transport I/O
5 */
6
7#ifndef SUNRPC_SVC_XPRT_H
8#define SUNRPC_SVC_XPRT_H
9
10#include <linux/sunrpc/svc.h>
11#include <linux/module.h>
12
13struct svc_xprt_ops {
14 struct svc_xprt *(*xpo_create)(struct svc_serv *,
15 struct sockaddr *, int,
16 int);
17 struct svc_xprt *(*xpo_accept)(struct svc_xprt *);
18 int (*xpo_has_wspace)(struct svc_xprt *);
19 int (*xpo_recvfrom)(struct svc_rqst *);
20 void (*xpo_prep_reply_hdr)(struct svc_rqst *);
21 int (*xpo_sendto)(struct svc_rqst *);
22 void (*xpo_release_rqst)(struct svc_rqst *);
23 void (*xpo_detach)(struct svc_xprt *);
24 void (*xpo_free)(struct svc_xprt *);
25};
26
27struct svc_xprt_class {
28 const char *xcl_name;
29 struct module *xcl_owner;
30 struct svc_xprt_ops *xcl_ops;
31 struct list_head xcl_list;
32 u32 xcl_max_payload;
33};
34
35struct svc_xprt {
36 struct svc_xprt_class *xpt_class;
37 struct svc_xprt_ops *xpt_ops;
38 struct kref xpt_ref;
39 struct list_head xpt_list;
40 struct list_head xpt_ready;
41 unsigned long xpt_flags;
42#define XPT_BUSY 0 /* enqueued/receiving */
43#define XPT_CONN 1 /* conn pending */
44#define XPT_CLOSE 2 /* dead or dying */
45#define XPT_DATA 3 /* data pending */
46#define XPT_TEMP 4 /* connected transport */
47#define XPT_DEAD 6 /* transport closed */
48#define XPT_CHNGBUF 7 /* need to change snd/rcv buf sizes */
49#define XPT_DEFERRED 8 /* deferred request pending */
50#define XPT_OLD 9 /* used for xprt aging mark+sweep */
51#define XPT_DETACHED 10 /* detached from tempsocks list */
52#define XPT_LISTENER 11 /* listening endpoint */
53#define XPT_CACHE_AUTH 12 /* cache auth info */
54
55 struct svc_pool *xpt_pool; /* current pool iff queued */
56 struct svc_serv *xpt_server; /* service for transport */
57 atomic_t xpt_reserved; /* space on outq that is rsvd */
58 struct mutex xpt_mutex; /* to serialize sending data */
59 spinlock_t xpt_lock; /* protects sk_deferred
60 * and xpt_auth_cache */
61 void *xpt_auth_cache;/* auth cache */
62 struct list_head xpt_deferred; /* deferred requests that need
63 * to be revisted */
64 struct sockaddr_storage xpt_local; /* local address */
65 size_t xpt_locallen; /* length of address */
66 struct sockaddr_storage xpt_remote; /* remote peer's address */
67 size_t xpt_remotelen; /* length of address */
68};
69
70int svc_reg_xprt_class(struct svc_xprt_class *);
71void svc_unreg_xprt_class(struct svc_xprt_class *);
72void svc_xprt_init(struct svc_xprt_class *, struct svc_xprt *,
73 struct svc_serv *);
74int svc_create_xprt(struct svc_serv *, char *, unsigned short, int);
75void svc_xprt_enqueue(struct svc_xprt *xprt);
76void svc_xprt_received(struct svc_xprt *);
77void svc_xprt_put(struct svc_xprt *xprt);
78void svc_xprt_copy_addrs(struct svc_rqst *rqstp, struct svc_xprt *xprt);
79void svc_close_xprt(struct svc_xprt *xprt);
80void svc_delete_xprt(struct svc_xprt *xprt);
81int svc_port_is_privileged(struct sockaddr *sin);
82int svc_print_xprts(char *buf, int maxlen);
83struct svc_xprt *svc_find_xprt(struct svc_serv *, char *, int, int);
84int svc_xprt_names(struct svc_serv *serv, char *buf, int buflen);
85
86static inline void svc_xprt_get(struct svc_xprt *xprt)
87{
88 kref_get(&xprt->xpt_ref);
89}
90static inline void svc_xprt_set_local(struct svc_xprt *xprt,
91 struct sockaddr *sa, int salen)
92{
93 memcpy(&xprt->xpt_local, sa, salen);
94 xprt->xpt_locallen = salen;
95}
96static inline void svc_xprt_set_remote(struct svc_xprt *xprt,
97 struct sockaddr *sa, int salen)
98{
99 memcpy(&xprt->xpt_remote, sa, salen);
100 xprt->xpt_remotelen = salen;
101}
102static inline unsigned short svc_addr_port(struct sockaddr *sa)
103{
104 unsigned short ret = 0;
105 switch (sa->sa_family) {
106 case AF_INET:
107 ret = ntohs(((struct sockaddr_in *)sa)->sin_port);
108 break;
109 case AF_INET6:
110 ret = ntohs(((struct sockaddr_in6 *)sa)->sin6_port);
111 break;
112 }
113 return ret;
114}
115
116static inline size_t svc_addr_len(struct sockaddr *sa)
117{
118 switch (sa->sa_family) {
119 case AF_INET:
120 return sizeof(struct sockaddr_in);
121 case AF_INET6:
122 return sizeof(struct sockaddr_in6);
123 }
124 return -EAFNOSUPPORT;
125}
126
127static inline unsigned short svc_xprt_local_port(struct svc_xprt *xprt)
128{
129 return svc_addr_port((struct sockaddr *)&xprt->xpt_local);
130}
131
132static inline unsigned short svc_xprt_remote_port(struct svc_xprt *xprt)
133{
134 return svc_addr_port((struct sockaddr *)&xprt->xpt_remote);
135}
136
137static inline char *__svc_print_addr(struct sockaddr *addr,
138 char *buf, size_t len)
139{
140 switch (addr->sa_family) {
141 case AF_INET:
142 snprintf(buf, len, "%u.%u.%u.%u, port=%u",
143 NIPQUAD(((struct sockaddr_in *) addr)->sin_addr),
144 ntohs(((struct sockaddr_in *) addr)->sin_port));
145 break;
146
147 case AF_INET6:
148 snprintf(buf, len, "%x:%x:%x:%x:%x:%x:%x:%x, port=%u",
149 NIP6(((struct sockaddr_in6 *) addr)->sin6_addr),
150 ntohs(((struct sockaddr_in6 *) addr)->sin6_port));
151 break;
152
153 default:
154 snprintf(buf, len, "unknown address type: %d", addr->sa_family);
155 break;
156 }
157 return buf;
158}
159#endif /* SUNRPC_SVC_XPRT_H */