1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
|
/*
* 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 *, const char *, const int,
const 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 *serv, const char *xcl_name,
const sa_family_t af, const unsigned short port);
int svc_xprt_names(struct svc_serv *serv, char *buf, const 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,
const struct sockaddr *sa,
const size_t salen)
{
memcpy(&xprt->xpt_local, sa, salen);
xprt->xpt_locallen = salen;
}
static inline void svc_xprt_set_remote(struct svc_xprt *xprt,
const struct sockaddr *sa,
const size_t salen)
{
memcpy(&xprt->xpt_remote, sa, salen);
xprt->xpt_remotelen = salen;
}
static inline unsigned short svc_addr_port(const struct sockaddr *sa)
{
const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)sa;
switch (sa->sa_family) {
case AF_INET:
return ntohs(sin->sin_port);
case AF_INET6:
return ntohs(sin6->sin6_port);
}
return 0;
}
static inline size_t svc_addr_len(const struct sockaddr *sa)
{
switch (sa->sa_family) {
case AF_INET:
return sizeof(struct sockaddr_in);
case AF_INET6:
return sizeof(struct sockaddr_in6);
}
return 0;
}
static inline unsigned short svc_xprt_local_port(const struct svc_xprt *xprt)
{
return svc_addr_port((const struct sockaddr *)&xprt->xpt_local);
}
static inline unsigned short svc_xprt_remote_port(const struct svc_xprt *xprt)
{
return svc_addr_port((const struct sockaddr *)&xprt->xpt_remote);
}
static inline char *__svc_print_addr(const struct sockaddr *addr,
char *buf, const size_t len)
{
const struct sockaddr_in *sin = (const struct sockaddr_in *)addr;
const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)addr;
switch (addr->sa_family) {
case AF_INET:
snprintf(buf, len, "%pI4, port=%u", &sin->sin_addr,
ntohs(sin->sin_port));
break;
case AF_INET6:
snprintf(buf, len, "%pI6, port=%u",
&sin6->sin6_addr,
ntohs(sin6->sin6_port));
break;
default:
snprintf(buf, len, "unknown address type: %d", addr->sa_family);
break;
}
return buf;
}
#endif /* SUNRPC_SVC_XPRT_H */
|
