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/*
* linux/fs/nfsd/stats.c
*
* procfs-based user access to knfsd statistics
*
* /proc/net/rpc/nfsd
*
* Format:
* rc <hits> <misses> <nocache>
* Statistsics for the reply cache
* fh <stale> <total-lookups> <anonlookups> <dir-not-in-dcache> <nondir-not-in-dcache>
* statistics for filehandle lookup
* io <bytes-read> <bytes-writtten>
* statistics for IO throughput
* th <threads> <fullcnt> <10%-20%> <20%-30%> ... <90%-100%> <100%>
* time (seconds) when nfsd thread usage above thresholds
* and number of times that all threads were in use
* ra cache-size <10% <20% <30% ... <100% not-found
* number of times that read-ahead entry was found that deep in
* the cache.
* plus generic RPC stats (see net/sunrpc/stats.c)
*
* Copyright (C) 1995, 1996, 1997 Olaf Kirch <okir@monad.swb.de>
*/
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/proc_fs.h>
#include <linux/stat.h>
#define __NO_VERSION__
#include <linux/module.h>
#include <linux/sunrpc/svc.h>
#include <linux/sunrpc/stats.h>
#include <linux/nfsd/nfsd.h>
#include <linux/nfsd/stats.h>
struct nfsd_stats nfsdstats;
struct svc_stat nfsd_svcstats = { &nfsd_program, };
static int
nfsd_proc_read(char *buffer, char **start, off_t offset, int count,
int *eof, void *data)
{
int len;
int i;
len = sprintf(buffer, "rc %u %u %u\nfh %u %u %u %u %u\nio %u %u\n",
nfsdstats.rchits,
nfsdstats.rcmisses,
nfsdstats.rcnocache,
nfsdstats.fh_stale,
nfsdstats.fh_lookup,
nfsdstats.fh_anon,
nfsdstats.fh_nocache_dir,
nfsdstats.fh_nocache_nondir,
nfsdstats.io_read,
nfsdstats.io_write);
/* thread usage: */
len += sprintf(buffer+len, "th %u %u", nfsdstats.th_cnt, nfsdstats.th_fullcnt);
for (i=0; i<10; i++) {
unsigned int jifs = nfsdstats.th_usage[i];
unsigned int sec = jifs / HZ, msec = (jifs % HZ)*1000/HZ;
len += sprintf(buffer+len, " %u.%03u", sec, msec);
}
/* newline and ra-cache */
len += sprintf(buffer+len, "\nra %u", nfsdstats.ra_size);
for (i=0; i<11; i++)
len += sprintf(buffer+len, " %u", nfsdstats.ra_depth[i]);
len += sprintf(buffer+len, "\n");
/* Assume we haven't hit EOF yet. Will be set by svc_proc_read. */
*eof = 0;
/*
* Append generic nfsd RPC statistics if there's room for it.
*/
if (len <= offset) {
len = svc_proc_read(buffer, start, offset - len, count,
eof, data);
return len;
}
if (len < count) {
len += svc_proc_read(buffer + len, start, 0, count - len,
eof, data);
}
if (offset >= len) {
*start = buffer;
return 0;
}
*start = buffer + offset;
if ((len -= offset) > count)
return count;
return len;
}
void
nfsd_stat_init(void)
{
struct proc_dir_entry *ent;
if ((ent = svc_proc_register(&nfsd_svcstats)) != 0) {
ent->read_proc = nfsd_proc_read;
ent->owner = THIS_MODULE;
}
}
void
nfsd_stat_shutdown(void)
{
svc_proc_unregister("nfsd");
}
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