// SPDX-License-Identifier: GPL-2.0
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/*
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* procfs-based user access to knfsd statistics
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*
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* /proc/net/rpc/nfsd
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*
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* Format:
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* rc <hits> <misses> <nocache>
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* Statistsics for the reply cache
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* fh <stale> <total-lookups> <anonlookups> <dir-not-in-dcache> <nondir-not-in-dcache>
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* statistics for filehandle lookup
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* io <bytes-read> <bytes-written>
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* statistics for IO throughput
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* th <threads> <fullcnt> <10%-20%> <20%-30%> ... <90%-100%> <100%>
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* time (seconds) when nfsd thread usage above thresholds
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* and number of times that all threads were in use
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* ra cache-size <10% <20% <30% ... <100% not-found
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* number of times that read-ahead entry was found that deep in
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* the cache.
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* plus generic RPC stats (see net/sunrpc/stats.c)
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*
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* Copyright (C) 1995, 1996, 1997 Olaf Kirch <okir@monad.swb.de>
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*/
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#include <linux/seq_file.h>
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#include <linux/module.h>
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#include <linux/sunrpc/stats.h>
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#include <net/net_namespace.h>
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#include "nfsd.h"
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struct nfsd_stats nfsdstats;
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struct svc_stat nfsd_svcstats = {
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.program = &nfsd_program,
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};
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static int nfsd_proc_show(struct seq_file *seq, void *v)
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{
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int i;
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seq_printf(seq, "rc %u %u %u\nfh %u %u %u %u %u\nio %u %u\n",
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nfsdstats.rchits,
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nfsdstats.rcmisses,
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nfsdstats.rcnocache,
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nfsdstats.fh_stale,
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nfsdstats.fh_lookup,
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nfsdstats.fh_anon,
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nfsdstats.fh_nocache_dir,
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nfsdstats.fh_nocache_nondir,
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nfsdstats.io_read,
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nfsdstats.io_write);
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/* thread usage: */
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seq_printf(seq, "th %u %u", nfsdstats.th_cnt, nfsdstats.th_fullcnt);
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for (i=0; i<10; i++) {
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unsigned int jifs = nfsdstats.th_usage[i];
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unsigned int sec = jifs / HZ, msec = (jifs % HZ)*1000/HZ;
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seq_printf(seq, " %u.%03u", sec, msec);
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}
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/* newline and ra-cache */
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seq_printf(seq, "\nra %u", nfsdstats.ra_size);
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for (i=0; i<11; i++)
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seq_printf(seq, " %u", nfsdstats.ra_depth[i]);
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seq_putc(seq, '\n');
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/* show my rpc info */
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svc_seq_show(seq, &nfsd_svcstats);
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#ifdef CONFIG_NFSD_V4
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/* Show count for individual nfsv4 operations */
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/* Writing operation numbers 0 1 2 also for maintaining uniformity */
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seq_printf(seq,"proc4ops %u", LAST_NFS4_OP + 1);
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for (i = 0; i <= LAST_NFS4_OP; i++)
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seq_printf(seq, " %u", nfsdstats.nfs4_opcount[i]);
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seq_putc(seq, '\n');
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#endif
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return 0;
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}
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static int nfsd_proc_open(struct inode *inode, struct file *file)
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{
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return single_open(file, nfsd_proc_show, NULL);
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}
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static const struct proc_ops nfsd_proc_ops = {
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.proc_open = nfsd_proc_open,
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.proc_read = seq_read,
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.proc_lseek = seq_lseek,
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.proc_release = single_release,
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};
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void
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nfsd_stat_init(void)
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{
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svc_proc_register(&init_net, &nfsd_svcstats, &nfsd_proc_ops);
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}
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void
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nfsd_stat_shutdown(void)
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{
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svc_proc_unregister(&init_net, "nfsd");
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}
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