xref: /openbmc/linux/net/sunrpc/stats.c (revision d5cb9783536a41df9f9cba5b0a1d78047ed787f7)
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/seq_file.h>
22 #include <linux/sunrpc/clnt.h>
23 #include <linux/sunrpc/svcsock.h>
24 
25 #define RPCDBG_FACILITY	RPCDBG_MISC
26 
27 struct proc_dir_entry	*proc_net_rpc = NULL;
28 
29 /*
30  * Get RPC client stats
31  */
32 static int rpc_proc_show(struct seq_file *seq, void *v) {
33 	const struct rpc_stat	*statp = seq->private;
34 	const struct rpc_program *prog = statp->program;
35 	int		i, j;
36 
37 	seq_printf(seq,
38 		"net %u %u %u %u\n",
39 			statp->netcnt,
40 			statp->netudpcnt,
41 			statp->nettcpcnt,
42 			statp->nettcpconn);
43 	seq_printf(seq,
44 		"rpc %u %u %u\n",
45 			statp->rpccnt,
46 			statp->rpcretrans,
47 			statp->rpcauthrefresh);
48 
49 	for (i = 0; i < prog->nrvers; i++) {
50 		const struct rpc_version *vers = prog->version[i];
51 		if (!vers)
52 			continue;
53 		seq_printf(seq, "proc%u %u",
54 					vers->number, vers->nrprocs);
55 		for (j = 0; j < vers->nrprocs; j++)
56 			seq_printf(seq, " %u",
57 					vers->procs[j].p_count);
58 		seq_putc(seq, '\n');
59 	}
60 	return 0;
61 }
62 
63 static int rpc_proc_open(struct inode *inode, struct file *file)
64 {
65 	return single_open(file, rpc_proc_show, PDE(inode)->data);
66 }
67 
68 static struct file_operations rpc_proc_fops = {
69 	.owner = THIS_MODULE,
70 	.open = rpc_proc_open,
71 	.read  = seq_read,
72 	.llseek = seq_lseek,
73 	.release = single_release,
74 };
75 
76 /*
77  * Get RPC server stats
78  */
79 void svc_seq_show(struct seq_file *seq, const struct svc_stat *statp) {
80 	const struct svc_program *prog = statp->program;
81 	const struct svc_procedure *proc;
82 	const struct svc_version *vers;
83 	int		i, j;
84 
85 	seq_printf(seq,
86 		"net %u %u %u %u\n",
87 			statp->netcnt,
88 			statp->netudpcnt,
89 			statp->nettcpcnt,
90 			statp->nettcpconn);
91 	seq_printf(seq,
92 		"rpc %u %u %u %u %u\n",
93 			statp->rpccnt,
94 			statp->rpcbadfmt+statp->rpcbadauth+statp->rpcbadclnt,
95 			statp->rpcbadfmt,
96 			statp->rpcbadauth,
97 			statp->rpcbadclnt);
98 
99 	for (i = 0; i < prog->pg_nvers; i++) {
100 		if (!(vers = prog->pg_vers[i]) || !(proc = vers->vs_proc))
101 			continue;
102 		seq_printf(seq, "proc%d %u", i, vers->vs_nproc);
103 		for (j = 0; j < vers->vs_nproc; j++, proc++)
104 			seq_printf(seq, " %u", proc->pc_count);
105 		seq_putc(seq, '\n');
106 	}
107 }
108 
109 /*
110  * Register/unregister RPC proc files
111  */
112 static inline struct proc_dir_entry *
113 do_register(const char *name, void *data, struct file_operations *fops)
114 {
115 	struct proc_dir_entry *ent;
116 
117 	rpc_proc_init();
118 	dprintk("RPC: registering /proc/net/rpc/%s\n", name);
119 
120 	ent = create_proc_entry(name, 0, proc_net_rpc);
121 	if (ent) {
122 		ent->proc_fops = fops;
123 		ent->data = data;
124 	}
125 	return ent;
126 }
127 
128 struct proc_dir_entry *
129 rpc_proc_register(struct rpc_stat *statp)
130 {
131 	return do_register(statp->program->name, statp, &rpc_proc_fops);
132 }
133 
134 void
135 rpc_proc_unregister(const char *name)
136 {
137 	remove_proc_entry(name, proc_net_rpc);
138 }
139 
140 struct proc_dir_entry *
141 svc_proc_register(struct svc_stat *statp, struct file_operations *fops)
142 {
143 	return do_register(statp->program->pg_name, statp, fops);
144 }
145 
146 void
147 svc_proc_unregister(const char *name)
148 {
149 	remove_proc_entry(name, proc_net_rpc);
150 }
151 
152 void
153 rpc_proc_init(void)
154 {
155 	dprintk("RPC: registering /proc/net/rpc\n");
156 	if (!proc_net_rpc) {
157 		struct proc_dir_entry *ent;
158 		ent = proc_mkdir("rpc", proc_net);
159 		if (ent) {
160 			ent->owner = THIS_MODULE;
161 			proc_net_rpc = ent;
162 		}
163 	}
164 }
165 
166 void
167 rpc_proc_exit(void)
168 {
169 	dprintk("RPC: unregistering /proc/net/rpc\n");
170 	if (proc_net_rpc) {
171 		proc_net_rpc = NULL;
172 		remove_proc_entry("net/rpc", NULL);
173 	}
174 }
175 
176