/*
* 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>
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/svcsock.h>
#include <linux/sunrpc/metrics.h>
#define RPCDBG_FACILITY RPCDBG_MISC
struct proc_dir_entry *proc_net_rpc = NULL;
/*
* Get RPC client stats
*/
static int rpc_proc_show(struct seq_file *seq, void *v) {
const struct rpc_stat *statp = seq->private;
const struct rpc_program *prog = statp->program;
int i, j;
seq_printf(seq,
"net %u %u %u %u\n",
statp->netcnt,
statp->netudpcnt,
statp->nettcpcnt,
statp->nettcpconn);
seq_printf(seq,
"rpc %u %u %u\n",
statp->rpccnt,
statp->rpcretrans,
statp->rpcauthrefresh);
for (i = 0; i < prog->nrvers; i++) {
const struct rpc_version *vers = prog->version[i];
if (!vers)
continue;
seq_printf(seq, "proc%u %u",
vers->number, vers->nrprocs);
for (j = 0; j < vers->nrprocs; j++)
seq_printf(seq, " %u",
vers->procs[j].p_count);
seq_putc(seq, '\n');
}
return 0;
}
static int rpc_proc_open(struct inode *inode, struct file *file)
{
return single_open(file, rpc_proc_show, PDE(inode)->data);
}
static struct file_operations rpc_proc_fops = {
.owner = THIS_MODULE,
.open = rpc_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
/*
* Get RPC server stats
*/
void svc_seq_show(struct seq_file *seq, const struct svc_stat *statp) {
const struct svc_program *prog = statp->program;
const struct svc_procedure *proc;
const struct svc_version *vers;
int i, j;
seq_printf(seq,
"net %u %u %u %u\n",
statp->netcnt,
statp->netudpcnt,
statp->nettcpcnt,
statp->nettcpconn);
seq_printf(seq,
"rpc %u %u %u %u %u\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;
seq_printf(seq, "proc%d %u", i, vers->vs_nproc);
for (j = 0; j < vers->vs_nproc; j++, proc++)
seq_printf(seq, " %u", proc->pc_count);
seq_putc(seq, '\n');
}
}
/**
* rpc_alloc_iostats - allocate an rpc_iostats structure
* @clnt: RPC program, version, and xprt
*
*/
struct rpc_iostats *rpc_alloc_iostats(struct rpc_clnt *clnt)
{
unsigned int ops = clnt->cl_maxproc;
size_t size = ops * sizeof(struct rpc_iostats);
struct rpc_iostats *new;
new = kmalloc(size, GFP_KERNEL);
if (new)
memset(new, 0 , size);
return new;
}
EXPORT_SYMBOL(rpc_alloc_iostats);
/**
* rpc_free_iostats - release an rpc_iostats structure
* @stats: doomed rpc_iostats structure
*
*/
void rpc_free_iostats(struct rpc_iostats *stats)
{
kfree(stats);
}
EXPORT_SYMBOL(rpc_free_iostats);
/**
* rpc_count_iostats - tally up per-task stats
* @task: completed rpc_task
*
* Relies on the caller for serialization.
*/
void rpc_count_iostats(struct rpc_task *task)
{
struct rpc_rqst *req = task->tk_rqstp;
struct rpc_iostats *stats = task->tk_client->cl_metrics;
struct rpc_iostats *op_metrics;
long rtt, execute, queue;
if (!stats || !req)
return;
op_metrics = &stats[task->tk_msg.rpc_proc->p_proc];
op_metrics->om_ops++;
op_metrics->om_ntrans += req->rq_ntrans;
op_metrics->om_timeouts += task->tk_timeouts;
op_metrics->om_bytes_sent += task->tk_bytes_sent;
op_metrics->om_bytes_recv += req->rq_received;
queue = (long)req->rq_xtime - task->tk_start;
if (queue < 0)
queue = -queue;
op_metrics->om_queue += queue;
rtt = task->tk_rtt;
if (rtt < 0)
rtt = -rtt;
op_metrics->om_rtt += rtt;
execute = (long)jiffies - task->tk_start;
if (execute < 0)
execute = -execute;
op_metrics->om_execute += execute;
}
#define MILLISECS_PER_JIFFY (1000UL / HZ)
void rpc_print_iostats(struct seq_file *seq, struct rpc_clnt *clnt)
{
struct rpc_iostats *stats = clnt->cl_metrics;
struct rpc_xprt *xprt = clnt->cl_xprt;
unsigned int op, maxproc = clnt->cl_maxproc;
if (!stats)
return;
seq_printf(seq, "\tRPC iostats version: %s ", RPC_IOSTATS_VERS);
seq_printf(seq, "p/v: %u/%u (%s)\n",
clnt->cl_prog, clnt->cl_vers, clnt->cl_protname);
if (xprt)
xprt->ops->print_stats(xprt, seq);
seq_printf(seq, "\tper-op statistics\n");
for (op = 0; op < maxproc; op++) {
struct rpc_iostats *metrics = &stats[op];
seq_printf(seq, "%12u: ", op);
seq_printf(seq, "%lu %lu %lu %Lu %Lu %Lu %Lu %Lu\n",
metrics->om_ops,
metrics->om_ntrans,
metrics->om_timeouts,
metrics->om_bytes_sent,
metrics->om_bytes_recv,
metrics->om_queue * MILLISECS_PER_JIFFY,
metrics->om_rtt * MILLISECS_PER_JIFFY,
metrics->om_execute * MILLISECS_PER_JIFFY);
}
}
EXPORT_SYMBOL(rpc_print_iostats);
/*
* Register/unregister RPC proc files
*/
static inline struct proc_dir_entry *
do_register(const char *name, void *data, struct file_operations *fops)
{
struct proc_dir_entry *ent;
rpc_proc_init();
dprintk("RPC: registering /proc/net/rpc/%s\n", name);
ent = create_proc_entry(name, 0, proc_net_rpc);
if (ent) {
ent->proc_fops = fops;
ent->data = data;
}
return ent;
}
struct proc_dir_entry *
rpc_proc_register(struct rpc_stat *statp)
{
return do_register(statp->program->name, statp, &rpc_proc_fops);
}
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, struct file_operations *fops)
{
return do_register(statp->program->pg_name, statp, fops);
}
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 = proc_mkdir("rpc", proc_net);
if (ent) {
ent->owner = THIS_MODULE;
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", NULL);
}
}
