1 /*
2 * linux/net/sunrpc/stats.c
3 *
4 * procfs-based user access to generic RPC statistics. The stats files
5 * reside in /proc/net/rpc.
6 *
7 * The read routines assume that the buffer passed in is just big enough.
8 * If you implement an RPC service that has its own stats routine which
9 * appends the generic RPC stats, make sure you don't exceed the PAGE_SIZE
10 * limit.
11 *
12 * Copyright (C) 1995, 1996, 1997 Olaf Kirch <okir@monad.swb.de>
13 */
14
15 #include <linux/module.h>
16
17 #include <linux/init.h>
18 #include <linux/kernel.h>
19 #include <linux/sched.h>
20 #include <linux/proc_fs.h>
21 #include <linux/sunrpc/clnt.h>
22 #include <linux/sunrpc/svcsock.h>
23 #include <linux/init.h>
24
25 #define RPCDBG_FACILITY RPCDBG_MISC
26
27 static struct proc_dir_entry *proc_net_rpc = NULL;
28
29 /*
30 * Get RPC client stats
31 */
32 int
rpc_proc_read(char * buffer,char ** start,off_t offset,int count,int * eof,void * data)33 rpc_proc_read(char *buffer, char **start, off_t offset, int count,
34 int *eof, void *data)
35 {
36 struct rpc_stat *statp = (struct rpc_stat *) data;
37 struct rpc_program *prog = statp->program;
38 struct rpc_version *vers;
39 int len, i, j;
40
41 len = sprintf(buffer,
42 "net %d %d %d %d\n",
43 statp->netcnt,
44 statp->netudpcnt,
45 statp->nettcpcnt,
46 statp->nettcpconn);
47 len += sprintf(buffer + len,
48 "rpc %d %d %d\n",
49 statp->rpccnt,
50 statp->rpcretrans,
51 statp->rpcauthrefresh);
52
53 for (i = 0; i < prog->nrvers; i++) {
54 if (!(vers = prog->version[i]))
55 continue;
56 len += sprintf(buffer + len, "proc%d %d",
57 vers->number, vers->nrprocs);
58 for (j = 0; j < vers->nrprocs; j++)
59 len += sprintf(buffer + len, " %d",
60 vers->procs[j].p_count);
61 buffer[len++] = '\n';
62 }
63
64 if (offset >= len) {
65 *start = buffer;
66 *eof = 1;
67 return 0;
68 }
69 *start = buffer + offset;
70 if ((len -= offset) > count)
71 return count;
72 *eof = 1;
73 return len;
74 }
75
76 /*
77 * Get RPC server stats
78 */
79 int
svc_proc_read(char * buffer,char ** start,off_t offset,int count,int * eof,void * data)80 svc_proc_read(char *buffer, char **start, off_t offset, int count,
81 int *eof, void *data)
82 {
83 struct svc_stat *statp = (struct svc_stat *) data;
84 struct svc_program *prog = statp->program;
85 struct svc_procedure *proc;
86 struct svc_version *vers;
87 int len, i, j;
88
89 len = sprintf(buffer,
90 "net %d %d %d %d\n",
91 statp->netcnt,
92 statp->netudpcnt,
93 statp->nettcpcnt,
94 statp->nettcpconn);
95 len += sprintf(buffer + len,
96 "rpc %d %d %d %d %d\n",
97 statp->rpccnt,
98 statp->rpcbadfmt+statp->rpcbadauth+statp->rpcbadclnt,
99 statp->rpcbadfmt,
100 statp->rpcbadauth,
101 statp->rpcbadclnt);
102
103 for (i = 0; i < prog->pg_nvers; i++) {
104 if (!(vers = prog->pg_vers[i]) || !(proc = vers->vs_proc))
105 continue;
106 len += sprintf(buffer + len, "proc%d %d", i, vers->vs_nproc);
107 for (j = 0; j < vers->vs_nproc; j++, proc++)
108 len += sprintf(buffer + len, " %d", proc->pc_count);
109 buffer[len++] = '\n';
110 }
111
112 if (offset >= len) {
113 *start = buffer;
114 *eof = 1;
115 return 0;
116 }
117 *start = buffer + offset;
118 if ((len -= offset) > count)
119 return count;
120 *eof = 1;
121 return len;
122 }
123
124 /*
125 * Register/unregister RPC proc files
126 */
127 static inline struct proc_dir_entry *
do_register(const char * name,void * data,int issvc)128 do_register(const char *name, void *data, int issvc)
129 {
130 rpc_proc_init();
131 dprintk("RPC: registering /proc/net/rpc/%s\n", name);
132 return create_proc_read_entry(name, 0, proc_net_rpc,
133 issvc? svc_proc_read : rpc_proc_read,
134 data);
135 }
136
137 struct proc_dir_entry *
rpc_proc_register(struct rpc_stat * statp)138 rpc_proc_register(struct rpc_stat *statp)
139 {
140 return do_register(statp->program->name, statp, 0);
141 }
142
143 void
rpc_proc_unregister(const char * name)144 rpc_proc_unregister(const char *name)
145 {
146 remove_proc_entry(name, proc_net_rpc);
147 }
148
149 struct proc_dir_entry *
svc_proc_register(struct svc_stat * statp)150 svc_proc_register(struct svc_stat *statp)
151 {
152 return do_register(statp->program->pg_name, statp, 1);
153 }
154
155 void
svc_proc_unregister(const char * name)156 svc_proc_unregister(const char *name)
157 {
158 remove_proc_entry(name, proc_net_rpc);
159 }
160
161 void
rpc_proc_init(void)162 rpc_proc_init(void)
163 {
164 dprintk("RPC: registering /proc/net/rpc\n");
165 if (!proc_net_rpc) {
166 struct proc_dir_entry *ent;
167 ent = proc_mkdir("net/rpc", 0);
168 if (ent) {
169 ent->owner = THIS_MODULE;
170 proc_net_rpc = ent;
171 }
172 }
173 }
174
175 void
rpc_proc_exit(void)176 rpc_proc_exit(void)
177 {
178 dprintk("RPC: unregistering /proc/net/rpc\n");
179 if (proc_net_rpc) {
180 proc_net_rpc = NULL;
181 remove_proc_entry("net/rpc", 0);
182 }
183 }
184
185
186 static int __init
init_sunrpc(void)187 init_sunrpc(void)
188 {
189 #ifdef RPC_DEBUG
190 rpc_register_sysctl();
191 #endif
192 rpc_proc_init();
193 return 0;
194 }
195
196 static void __exit
cleanup_sunrpc(void)197 cleanup_sunrpc(void)
198 {
199 #ifdef RPC_DEBUG
200 rpc_unregister_sysctl();
201 #endif
202 rpc_proc_exit();
203 }
204 MODULE_LICENSE("GPL");
205 module_init(init_sunrpc);
206 module_exit(cleanup_sunrpc);
207