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/*
* linux/net/sunrpc/stats.c
*
* procfs-based user access to generic RPC statistics. The stats files
* reside in /proc/net/rpc.
*
* The read routines assume that the buffer passed in is just big enough.
* If you implement an RPC service that has its own stats routine which
* appends the generic RPC stats, make sure you don't exceed the PAGE_SIZE
* limit.
*
* Copyright (C) 1995, 1996, 1997 Olaf Kirch <okir@monad.swb.de>
*/
#define __NO_VERSION__
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/proc_fs.h>
#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/svcsock.h>
#define RPCDBG_FACILITY RPCDBG_MISC
static struct proc_dir_entry *proc_net_rpc = NULL;
/*
* Get RPC client stats
*/
int
rpc_proc_read(char *buffer, char **start, off_t offset, int count,
int *eof, void *data)
{
struct rpc_stat *statp = (struct rpc_stat *) data;
struct rpc_program *prog = statp->program;
struct rpc_version *vers;
int len, i, j;
len = sprintf(buffer,
"net %d %d %d %d\n",
statp->netcnt,
statp->netudpcnt,
statp->nettcpcnt,
statp->nettcpconn);
len += sprintf(buffer + len,
"rpc %d %d %d\n",
statp->rpccnt,
statp->rpcretrans,
statp->rpcauthrefresh);
for (i = 0; i < prog->nrvers; i++) {
if (!(vers = prog->version[i]))
continue;
len += sprintf(buffer + len, "proc%d %d",
vers->number, vers->nrprocs);
for (j = 0; j < vers->nrprocs; j++)
len += sprintf(buffer + len, " %d",
vers->procs[j].p_count);
buffer[len++] = '\n';
}
if (offset >= len) {
*start = buffer;
*eof = 1;
return 0;
}
*start = buffer + offset;
if ((len -= offset) > count)
return count;
*eof = 1;
return len;
}
/*
* Get RPC server stats
*/
int
svc_proc_read(char *buffer, char **start, off_t offset, int count,
int *eof, void *data)
{
struct svc_stat *statp = (struct svc_stat *) data;
struct svc_program *prog = statp->program;
struct svc_procedure *proc;
struct svc_version *vers;
int len, i, j;
len = sprintf(buffer,
"net %d %d %d %d\n",
statp->netcnt,
statp->netudpcnt,
statp->nettcpcnt,
statp->nettcpconn);
len += sprintf(buffer + len,
"rpc %d %d %d %d %d\n",
statp->rpccnt,
statp->rpcbadfmt+statp->rpcbadauth+statp->rpcbadclnt,
statp->rpcbadfmt,
statp->rpcbadauth,
statp->rpcbadclnt);
for (i = 0; i < prog->pg_nvers; i++) {
if (!(vers = prog->pg_vers[i]) || !(proc = vers->vs_proc))
continue;
len += sprintf(buffer + len, "proc%d %d", i, vers->vs_nproc);
for (j = 0; j < vers->vs_nproc; j++, proc++)
len += sprintf(buffer + len, " %d", proc->pc_count);
buffer[len++] = '\n';
}
if (offset >= len) {
*start = buffer;
*eof = 1;
return 0;
}
*start = buffer + offset;
if ((len -= offset) > count)
return count;
*eof = 1;
return len;
}
/*
* Register/unregister RPC proc files
*/
static inline struct proc_dir_entry *
do_register(const char *name, void *data, int issvc)
{
struct proc_dir_entry *ent;
dprintk("RPC: registering /proc/net/rpc/%s\n", name);
ent = create_proc_entry(name, 0, proc_net_rpc);
ent->read_proc = issvc? svc_proc_read : rpc_proc_read;
ent->data = data;
return ent;
}
struct proc_dir_entry *
rpc_proc_register(struct rpc_stat *statp)
{
return do_register(statp->program->name, statp, 0);
}
void
rpc_proc_unregister(const char *name)
{
remove_proc_entry(name, proc_net_rpc);
}
struct proc_dir_entry *
svc_proc_register(struct svc_stat *statp)
{
return do_register(statp->program->pg_name, statp, 1);
}
void
svc_proc_unregister(const char *name)
{
remove_proc_entry(name, proc_net_rpc);
}
void
rpc_proc_init(void)
{
dprintk("RPC: registering /proc/net/rpc\n");
if (!proc_net_rpc) {
struct proc_dir_entry *ent;
ent = create_proc_entry("net/rpc", S_IFDIR, 0);
if (ent) {
#ifdef MODULE
ent->fill_inode = rpc_modcount;
#endif
proc_net_rpc = ent;
}
}
}
void
rpc_proc_exit(void)
{
dprintk("RPC: unregistering /proc/net/rpc\n");
if (proc_net_rpc) {
proc_net_rpc = NULL;
remove_proc_entry("net/rpc", 0);
}
}
#ifdef MODULE
/*
* This is called as the proc_dir_entry fill_inode function
* when an inode is going into or out of service (fill == 1
* or 0 respectively).
*
* We use it here to keep the module from being unloaded
* while /proc inodes are in use.
*/
void rpc_modcount(struct inode *inode, int fill)
{
if (fill)
MOD_INC_USE_COUNT;
else
MOD_DEC_USE_COUNT;
}
int
init_module(void)
{
#ifdef RPC_DEBUG
rpc_register_sysctl();
#endif
rpc_proc_init();
return 0;
}
void
cleanup_module(void)
{
#ifdef RPC_DEBUG
rpc_unregister_sysctl();
#endif
rpc_proc_exit();
}
#endif
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