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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> <deprecated filehandle cache stats>
- * statistics for filehandle lookup
- * io <bytes-read> <bytes-written>
- * statistics for IO throughput
- * th <threads> <deprecated thread usage histogram stats>
- * number of threads
- * ra <deprecated ra-cache stats>
- *
- * plus generic RPC stats (see net/sunrpc/stats.c)
- *
- * Copyright (C) 1995, 1996, 1997 Olaf Kirch <[email protected]>
- */
- #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_show(struct seq_file *seq, void *v)
- {
- int i;
- seq_printf(seq, "rc %lld %lld %lld\nfh %lld 0 0 0 0\nio %lld %lld\n",
- percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_RC_HITS]),
- percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_RC_MISSES]),
- percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_RC_NOCACHE]),
- percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_FH_STALE]),
- percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_IO_READ]),
- percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_IO_WRITE]));
- /* thread usage: */
- seq_printf(seq, "th %u 0", atomic_read(&nfsdstats.th_cnt));
- /* deprecated thread usage histogram stats */
- for (i = 0; i < 10; i++)
- seq_puts(seq, " 0.000");
- /* deprecated ra-cache stats */
- seq_puts(seq, "\nra 0 0 0 0 0 0 0 0 0 0 0 0\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, " %lld",
- percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_NFS4_OP(i)]));
- }
- seq_putc(seq, '\n');
- #endif
- return 0;
- }
- DEFINE_PROC_SHOW_ATTRIBUTE(nfsd);
- int nfsd_percpu_counters_init(struct percpu_counter counters[], int num)
- {
- int i, err = 0;
- for (i = 0; !err && i < num; i++)
- err = percpu_counter_init(&counters[i], 0, GFP_KERNEL);
- if (!err)
- return 0;
- for (; i > 0; i--)
- percpu_counter_destroy(&counters[i-1]);
- return err;
- }
- void nfsd_percpu_counters_reset(struct percpu_counter counters[], int num)
- {
- int i;
- for (i = 0; i < num; i++)
- percpu_counter_set(&counters[i], 0);
- }
- void nfsd_percpu_counters_destroy(struct percpu_counter counters[], int num)
- {
- int i;
- for (i = 0; i < num; i++)
- percpu_counter_destroy(&counters[i]);
- }
- static int nfsd_stat_counters_init(void)
- {
- return nfsd_percpu_counters_init(nfsdstats.counter, NFSD_STATS_COUNTERS_NUM);
- }
- static void nfsd_stat_counters_destroy(void)
- {
- nfsd_percpu_counters_destroy(nfsdstats.counter, NFSD_STATS_COUNTERS_NUM);
- }
- int nfsd_stat_init(void)
- {
- int err;
- err = nfsd_stat_counters_init();
- if (err)
- return err;
- svc_proc_register(&init_net, &nfsd_svcstats, &nfsd_proc_ops);
- return 0;
- }
- void nfsd_stat_shutdown(void)
- {
- nfsd_stat_counters_destroy();
- svc_proc_unregister(&init_net, "nfsd");
- }
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