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7#ifndef SUNRPC_SVC_XPRT_H
8#define SUNRPC_SVC_XPRT_H
9
10#include <linux/sunrpc/svc.h>
11
12struct module;
13
14struct svc_xprt_ops {
15 struct svc_xprt *(*xpo_create)(struct svc_serv *,
16 struct net *net,
17 struct sockaddr *, int,
18 int);
19 struct svc_xprt *(*xpo_accept)(struct svc_xprt *);
20 int (*xpo_has_wspace)(struct svc_xprt *);
21 int (*xpo_recvfrom)(struct svc_rqst *);
22 void (*xpo_prep_reply_hdr)(struct svc_rqst *);
23 int (*xpo_sendto)(struct svc_rqst *);
24 void (*xpo_release_rqst)(struct svc_rqst *);
25 void (*xpo_detach)(struct svc_xprt *);
26 void (*xpo_free)(struct svc_xprt *);
27 int (*xpo_secure_port)(struct svc_rqst *);
28 void (*xpo_kill_temp_xprt)(struct svc_xprt *);
29};
30
31struct svc_xprt_class {
32 const char *xcl_name;
33 struct module *xcl_owner;
34 struct svc_xprt_ops *xcl_ops;
35 struct list_head xcl_list;
36 u32 xcl_max_payload;
37 int xcl_ident;
38};
39
40
41
42
43
44
45struct svc_xpt_user {
46 struct list_head list;
47 void (*callback)(struct svc_xpt_user *);
48};
49
50struct svc_xprt {
51 struct svc_xprt_class *xpt_class;
52 struct svc_xprt_ops *xpt_ops;
53 struct kref xpt_ref;
54 struct list_head xpt_list;
55 struct list_head xpt_ready;
56 unsigned long xpt_flags;
57#define XPT_BUSY 0
58#define XPT_CONN 1
59#define XPT_CLOSE 2
60#define XPT_DATA 3
61#define XPT_TEMP 4
62#define XPT_DEAD 6
63#define XPT_CHNGBUF 7
64#define XPT_DEFERRED 8
65#define XPT_OLD 9
66#define XPT_LISTENER 10
67#define XPT_CACHE_AUTH 11
68#define XPT_LOCAL 12
69
70 struct svc_serv *xpt_server;
71 atomic_t xpt_reserved;
72 atomic_t xpt_nr_rqsts;
73 struct mutex xpt_mutex;
74 spinlock_t xpt_lock;
75
76 void *xpt_auth_cache;
77 struct list_head xpt_deferred;
78
79 struct sockaddr_storage xpt_local;
80 size_t xpt_locallen;
81 struct sockaddr_storage xpt_remote;
82 size_t xpt_remotelen;
83 struct rpc_wait_queue xpt_bc_pending;
84 struct list_head xpt_users;
85
86 struct net *xpt_net;
87 struct rpc_xprt *xpt_bc_xprt;
88 struct rpc_xprt_switch *xpt_bc_xps;
89};
90
91static inline void unregister_xpt_user(struct svc_xprt *xpt, struct svc_xpt_user *u)
92{
93 spin_lock(&xpt->xpt_lock);
94 list_del_init(&u->list);
95 spin_unlock(&xpt->xpt_lock);
96}
97
98static inline int register_xpt_user(struct svc_xprt *xpt, struct svc_xpt_user *u)
99{
100 spin_lock(&xpt->xpt_lock);
101 if (test_bit(XPT_CLOSE, &xpt->xpt_flags)) {
102
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105
106
107 spin_unlock(&xpt->xpt_lock);
108 return -ENOTCONN;
109 }
110 list_add(&u->list, &xpt->xpt_users);
111 spin_unlock(&xpt->xpt_lock);
112 return 0;
113}
114
115int svc_reg_xprt_class(struct svc_xprt_class *);
116void svc_unreg_xprt_class(struct svc_xprt_class *);
117void svc_xprt_init(struct net *, struct svc_xprt_class *, struct svc_xprt *,
118 struct svc_serv *);
119int svc_create_xprt(struct svc_serv *, const char *, struct net *,
120 const int, const unsigned short, int);
121void svc_xprt_do_enqueue(struct svc_xprt *xprt);
122void svc_xprt_enqueue(struct svc_xprt *xprt);
123void svc_xprt_put(struct svc_xprt *xprt);
124void svc_xprt_copy_addrs(struct svc_rqst *rqstp, struct svc_xprt *xprt);
125void svc_close_xprt(struct svc_xprt *xprt);
126int svc_port_is_privileged(struct sockaddr *sin);
127int svc_print_xprts(char *buf, int maxlen);
128struct svc_xprt *svc_find_xprt(struct svc_serv *serv, const char *xcl_name,
129 struct net *net, const sa_family_t af,
130 const unsigned short port);
131int svc_xprt_names(struct svc_serv *serv, char *buf, const int buflen);
132void svc_add_new_perm_xprt(struct svc_serv *serv, struct svc_xprt *xprt);
133void svc_age_temp_xprts_now(struct svc_serv *, struct sockaddr *);
134
135static inline void svc_xprt_get(struct svc_xprt *xprt)
136{
137 kref_get(&xprt->xpt_ref);
138}
139static inline void svc_xprt_set_local(struct svc_xprt *xprt,
140 const struct sockaddr *sa,
141 const size_t salen)
142{
143 memcpy(&xprt->xpt_local, sa, salen);
144 xprt->xpt_locallen = salen;
145}
146static inline void svc_xprt_set_remote(struct svc_xprt *xprt,
147 const struct sockaddr *sa,
148 const size_t salen)
149{
150 memcpy(&xprt->xpt_remote, sa, salen);
151 xprt->xpt_remotelen = salen;
152}
153static inline unsigned short svc_addr_port(const struct sockaddr *sa)
154{
155 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
156 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)sa;
157
158 switch (sa->sa_family) {
159 case AF_INET:
160 return ntohs(sin->sin_port);
161 case AF_INET6:
162 return ntohs(sin6->sin6_port);
163 }
164
165 return 0;
166}
167
168static inline size_t svc_addr_len(const struct sockaddr *sa)
169{
170 switch (sa->sa_family) {
171 case AF_INET:
172 return sizeof(struct sockaddr_in);
173 case AF_INET6:
174 return sizeof(struct sockaddr_in6);
175 }
176 BUG();
177}
178
179static inline unsigned short svc_xprt_local_port(const struct svc_xprt *xprt)
180{
181 return svc_addr_port((const struct sockaddr *)&xprt->xpt_local);
182}
183
184static inline unsigned short svc_xprt_remote_port(const struct svc_xprt *xprt)
185{
186 return svc_addr_port((const struct sockaddr *)&xprt->xpt_remote);
187}
188
189static inline char *__svc_print_addr(const struct sockaddr *addr,
190 char *buf, const size_t len)
191{
192 const struct sockaddr_in *sin = (const struct sockaddr_in *)addr;
193 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)addr;
194
195 switch (addr->sa_family) {
196 case AF_INET:
197 snprintf(buf, len, "%pI4, port=%u", &sin->sin_addr,
198 ntohs(sin->sin_port));
199 break;
200
201 case AF_INET6:
202 snprintf(buf, len, "%pI6, port=%u",
203 &sin6->sin6_addr,
204 ntohs(sin6->sin6_port));
205 break;
206
207 default:
208 snprintf(buf, len, "unknown address type: %d", addr->sa_family);
209 break;
210 }
211
212 return buf;
213}
214#endif
215