8e153e6f02
[ Upstream commit 4b14885411f74b2b0ce0eb2b39d0fffe54e5ca0d ] We have a global set of counters that we modify for all of the nfsd operations, but now that we're exposing these stats across all network namespaces we need to make the stats also be per-network namespace. We already have some caching stats that are per-network namespace, so move these definitions into the same counter and then adjust all the helpers and users of these stats to provide the appropriate nfsd_net struct so that the stats are maintained for the per-network namespace objects. Signed-off-by: Josef Bacik <josef@toxicpanda.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> [ cel: adjusted to apply to v5.10.y ] Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
129 lines
3.2 KiB
C
Executable file
129 lines
3.2 KiB
C
Executable file
// 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> <deprecated filehandle cache stats>
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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> <deprecated thread usage histogram stats>
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* number of threads
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* ra <deprecated ra-cache stats>
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*
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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_show(struct seq_file *seq, void *v)
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{
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struct net *net = PDE_DATA(file_inode(seq->file));
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struct nfsd_net *nn = net_generic(net, nfsd_net_id);
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int i;
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seq_printf(seq, "rc %lld %lld %lld\nfh %lld 0 0 0 0\nio %lld %lld\n",
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percpu_counter_sum_positive(&nn->counter[NFSD_STATS_RC_HITS]),
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percpu_counter_sum_positive(&nn->counter[NFSD_STATS_RC_MISSES]),
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percpu_counter_sum_positive(&nn->counter[NFSD_STATS_RC_NOCACHE]),
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percpu_counter_sum_positive(&nn->counter[NFSD_STATS_FH_STALE]),
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percpu_counter_sum_positive(&nn->counter[NFSD_STATS_IO_READ]),
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percpu_counter_sum_positive(&nn->counter[NFSD_STATS_IO_WRITE]));
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/* thread usage: */
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seq_printf(seq, "th %u 0", atomic_read(&nfsdstats.th_cnt));
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/* deprecated thread usage histogram stats */
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for (i = 0; i < 10; i++)
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seq_puts(seq, " 0.000");
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/* deprecated ra-cache stats */
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seq_puts(seq, "\nra 0 0 0 0 0 0 0 0 0 0 0 0\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, " %lld",
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percpu_counter_sum_positive(&nn->counter[NFSD_STATS_NFS4_OP(i)]));
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}
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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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DEFINE_PROC_SHOW_ATTRIBUTE(nfsd);
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int nfsd_percpu_counters_init(struct percpu_counter *counters, int num)
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{
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int i, err = 0;
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for (i = 0; !err && i < num; i++)
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err = percpu_counter_init(&counters[i], 0, GFP_KERNEL);
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if (!err)
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return 0;
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for (; i > 0; i--)
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percpu_counter_destroy(&counters[i-1]);
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return err;
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}
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void nfsd_percpu_counters_reset(struct percpu_counter counters[], int num)
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{
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int i;
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for (i = 0; i < num; i++)
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percpu_counter_set(&counters[i], 0);
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}
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void nfsd_percpu_counters_destroy(struct percpu_counter counters[], int num)
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{
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int i;
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for (i = 0; i < num; i++)
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percpu_counter_destroy(&counters[i]);
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}
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int nfsd_stat_counters_init(struct nfsd_net *nn)
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{
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return nfsd_percpu_counters_init(nn->counter, NFSD_STATS_COUNTERS_NUM);
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}
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void nfsd_stat_counters_destroy(struct nfsd_net *nn)
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{
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nfsd_percpu_counters_destroy(nn->counter, NFSD_STATS_COUNTERS_NUM);
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}
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void nfsd_proc_stat_init(struct net *net)
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{
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svc_proc_register(net, &nfsd_svcstats, &nfsd_proc_ops);
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}
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void nfsd_proc_stat_shutdown(struct net *net)
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{
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svc_proc_unregister(net, "nfsd");
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}
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