Commit | Line | Data |
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1d8206b9 TT |
1 | /* |
2 | * linux/net/sunrpc/svc_xprt.c | |
3 | * | |
4 | * Author: Tom Tucker <tom@opengridcomputing.com> | |
5 | */ | |
6 | ||
7 | #include <linux/sched.h> | |
8 | #include <linux/errno.h> | |
9 | #include <linux/fcntl.h> | |
10 | #include <linux/net.h> | |
11 | #include <linux/in.h> | |
12 | #include <linux/inet.h> | |
13 | #include <linux/udp.h> | |
14 | #include <linux/tcp.h> | |
15 | #include <linux/unistd.h> | |
16 | #include <linux/slab.h> | |
17 | #include <linux/netdevice.h> | |
18 | #include <linux/skbuff.h> | |
19 | #include <linux/file.h> | |
20 | #include <linux/freezer.h> | |
21 | #include <net/sock.h> | |
22 | #include <net/checksum.h> | |
23 | #include <net/ip.h> | |
24 | #include <net/ipv6.h> | |
25 | #include <net/tcp_states.h> | |
26 | #include <linux/uaccess.h> | |
27 | #include <asm/ioctls.h> | |
28 | ||
29 | #include <linux/sunrpc/types.h> | |
30 | #include <linux/sunrpc/clnt.h> | |
31 | #include <linux/sunrpc/xdr.h> | |
32 | #include <linux/sunrpc/svcsock.h> | |
33 | #include <linux/sunrpc/stats.h> | |
34 | #include <linux/sunrpc/svc_xprt.h> | |
35 | ||
36 | #define RPCDBG_FACILITY RPCDBG_SVCXPRT | |
37 | ||
38 | /* List of registered transport classes */ | |
39 | static DEFINE_SPINLOCK(svc_xprt_class_lock); | |
40 | static LIST_HEAD(svc_xprt_class_list); | |
41 | ||
42 | int svc_reg_xprt_class(struct svc_xprt_class *xcl) | |
43 | { | |
44 | struct svc_xprt_class *cl; | |
45 | int res = -EEXIST; | |
46 | ||
47 | dprintk("svc: Adding svc transport class '%s'\n", xcl->xcl_name); | |
48 | ||
49 | INIT_LIST_HEAD(&xcl->xcl_list); | |
50 | spin_lock(&svc_xprt_class_lock); | |
51 | /* Make sure there isn't already a class with the same name */ | |
52 | list_for_each_entry(cl, &svc_xprt_class_list, xcl_list) { | |
53 | if (strcmp(xcl->xcl_name, cl->xcl_name) == 0) | |
54 | goto out; | |
55 | } | |
56 | list_add_tail(&xcl->xcl_list, &svc_xprt_class_list); | |
57 | res = 0; | |
58 | out: | |
59 | spin_unlock(&svc_xprt_class_lock); | |
60 | return res; | |
61 | } | |
62 | EXPORT_SYMBOL_GPL(svc_reg_xprt_class); | |
63 | ||
64 | void svc_unreg_xprt_class(struct svc_xprt_class *xcl) | |
65 | { | |
66 | dprintk("svc: Removing svc transport class '%s'\n", xcl->xcl_name); | |
67 | spin_lock(&svc_xprt_class_lock); | |
68 | list_del_init(&xcl->xcl_list); | |
69 | spin_unlock(&svc_xprt_class_lock); | |
70 | } | |
71 | EXPORT_SYMBOL_GPL(svc_unreg_xprt_class); | |
72 | ||
73 | /* | |
74 | * Called by transport drivers to initialize the transport independent | |
75 | * portion of the transport instance. | |
76 | */ | |
77 | void svc_xprt_init(struct svc_xprt_class *xcl, struct svc_xprt *xprt) | |
78 | { | |
79 | memset(xprt, 0, sizeof(*xprt)); | |
80 | xprt->xpt_class = xcl; | |
81 | xprt->xpt_ops = xcl->xcl_ops; | |
82 | } | |
83 | EXPORT_SYMBOL_GPL(svc_xprt_init); | |
b700cbb1 TT |
84 | |
85 | int svc_create_xprt(struct svc_serv *serv, char *xprt_name, unsigned short port, | |
86 | int flags) | |
87 | { | |
88 | struct svc_xprt_class *xcl; | |
89 | int ret = -ENOENT; | |
90 | struct sockaddr_in sin = { | |
91 | .sin_family = AF_INET, | |
92 | .sin_addr.s_addr = INADDR_ANY, | |
93 | .sin_port = htons(port), | |
94 | }; | |
95 | dprintk("svc: creating transport %s[%d]\n", xprt_name, port); | |
96 | spin_lock(&svc_xprt_class_lock); | |
97 | list_for_each_entry(xcl, &svc_xprt_class_list, xcl_list) { | |
98 | if (strcmp(xprt_name, xcl->xcl_name) == 0) { | |
99 | spin_unlock(&svc_xprt_class_lock); | |
100 | if (try_module_get(xcl->xcl_owner)) { | |
101 | struct svc_xprt *newxprt; | |
102 | ret = 0; | |
103 | newxprt = xcl->xcl_ops->xpo_create | |
104 | (serv, | |
105 | (struct sockaddr *)&sin, sizeof(sin), | |
106 | flags); | |
107 | if (IS_ERR(newxprt)) { | |
108 | module_put(xcl->xcl_owner); | |
109 | ret = PTR_ERR(newxprt); | |
110 | } | |
111 | } | |
112 | goto out; | |
113 | } | |
114 | } | |
115 | spin_unlock(&svc_xprt_class_lock); | |
116 | dprintk("svc: transport %s not found\n", xprt_name); | |
117 | out: | |
118 | return ret; | |
119 | } | |
120 | EXPORT_SYMBOL_GPL(svc_create_xprt); |