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// SPDX-License-Identifier: GPL-2.0
/*
* 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-written>
* 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/seq_file.h>
#include <linux/module.h>
#include <linux/sunrpc/stats.h>
#include <net/net_namespace.h>
#include "nfsd.h"
struct nfsd_stats nfsdstats;
struct svc_stat nfsd_svcstats = {
.program = &nfsd_program,
};
static int nfsd_proc_show(struct seq_file *seq, void *v)
{
int i;
seq_printf(seq, "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: */
seq_printf(seq, "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;
seq_printf(seq, " %u.%03u", sec, msec);
}
/* newline and ra-cache */
seq_printf(seq, "\nra %u", nfsdstats.ra_size);
for (i=0; i<11; i++)
seq_printf(seq, " %u", nfsdstats.ra_depth[i]);
seq_putc(seq, '\n');
/* show my rpc info */
svc_seq_show(seq, &nfsd_svcstats);
#ifdef CONFIG_NFSD_V4
/* Show count for individual nfsv4 operations */
/* Writing operation numbers 0 1 2 also for maintaining uniformity */
seq_printf(seq,"proc4ops %u", LAST_NFS4_OP + 1);
for (i = 0; i <= LAST_NFS4_OP; i++)
seq_printf(seq, " %u", nfsdstats.nfs4_opcount[i]);
seq_putc(seq, '\n');
#endif
return 0;
}
static int nfsd_proc_open(struct inode *inode, struct file *file)
{
return single_open(file, nfsd_proc_show, NULL);
}
static const struct proc_ops nfsd_proc_ops = {
.proc_open = nfsd_proc_open,
.proc_read = seq_read,
.proc_lseek = seq_lseek,
.proc_release = single_release,
};
void
nfsd_stat_init(void)
{
svc_proc_register(&init_net, &nfsd_svcstats, &nfsd_proc_ops);
}
void
nfsd_stat_shutdown(void)
{
svc_proc_unregister(&init_net, "nfsd");
}
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