1/* SPDX-License-Identifier: GPL-2.0 */
  2/*
  3 * Statistics for NFS server.
  4 *
  5 * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
  6 */
  7#ifndef _NFSD_STATS_H
  8#define _NFSD_STATS_H
  9
 10#include <uapi/linux/nfsd/stats.h>
 11#include <linux/percpu_counter.h>
 12
 13
 14enum {
 15	NFSD_STATS_RC_HITS,		/* repcache hits */
 16	NFSD_STATS_RC_MISSES,		/* repcache misses */
 17	NFSD_STATS_RC_NOCACHE,		/* uncached reqs */
 18	NFSD_STATS_FH_STALE,		/* FH stale error */
 19	NFSD_STATS_IO_READ,		/* bytes returned to read requests */
 20	NFSD_STATS_IO_WRITE,		/* bytes passed in write requests */
 21#ifdef CONFIG_NFSD_V4
 22	NFSD_STATS_FIRST_NFS4_OP,	/* count of individual nfsv4 operations */
 23	NFSD_STATS_LAST_NFS4_OP = NFSD_STATS_FIRST_NFS4_OP + LAST_NFS4_OP,
 24#define NFSD_STATS_NFS4_OP(op)	(NFSD_STATS_FIRST_NFS4_OP + (op))
 25	NFSD_STATS_WDELEG_GETATTR,	/* count of getattr conflict with wdeleg */
 26#endif
 27	NFSD_STATS_COUNTERS_NUM
 28};
 29
 30struct nfsd_stats {
 31	struct percpu_counter	counter[NFSD_STATS_COUNTERS_NUM];
 32
 33	atomic_t	th_cnt;		/* number of available threads */
 34};
 35
 36extern struct nfsd_stats	nfsdstats;
 37
 38extern struct svc_stat		nfsd_svcstats;
 39
 40int nfsd_percpu_counters_init(struct percpu_counter *counters, int num);
 41void nfsd_percpu_counters_reset(struct percpu_counter *counters, int num);
 42void nfsd_percpu_counters_destroy(struct percpu_counter *counters, int num);
 43int nfsd_stat_init(void);
 44void nfsd_stat_shutdown(void);
 45
 46static inline void nfsd_stats_rc_hits_inc(void)
 47{
 48	percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_RC_HITS]);
 49}
 50
 51static inline void nfsd_stats_rc_misses_inc(void)
 52{
 53	percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_RC_MISSES]);
 54}
 55
 56static inline void nfsd_stats_rc_nocache_inc(void)
 57{
 58	percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_RC_NOCACHE]);
 59}
 60
 61static inline void nfsd_stats_fh_stale_inc(struct svc_export *exp)
 62{
 63	percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_FH_STALE]);
 64	if (exp && exp->ex_stats)
 65		percpu_counter_inc(&exp->ex_stats->counter[EXP_STATS_FH_STALE]);
 66}
 67
 68static inline void nfsd_stats_io_read_add(struct svc_export *exp, s64 amount)
 69{
 70	percpu_counter_add(&nfsdstats.counter[NFSD_STATS_IO_READ], amount);
 71	if (exp && exp->ex_stats)
 72		percpu_counter_add(&exp->ex_stats->counter[EXP_STATS_IO_READ], amount);
 73}
 74
 75static inline void nfsd_stats_io_write_add(struct svc_export *exp, s64 amount)
 76{
 77	percpu_counter_add(&nfsdstats.counter[NFSD_STATS_IO_WRITE], amount);
 78	if (exp && exp->ex_stats)
 79		percpu_counter_add(&exp->ex_stats->counter[EXP_STATS_IO_WRITE], amount);
 80}
 81
 82static inline void nfsd_stats_payload_misses_inc(struct nfsd_net *nn)
 83{
 84	percpu_counter_inc(&nn->counter[NFSD_NET_PAYLOAD_MISSES]);
 85}
 86
 87static inline void nfsd_stats_drc_mem_usage_add(struct nfsd_net *nn, s64 amount)
 88{
 89	percpu_counter_add(&nn->counter[NFSD_NET_DRC_MEM_USAGE], amount);
 90}
 91
 92static inline void nfsd_stats_drc_mem_usage_sub(struct nfsd_net *nn, s64 amount)
 93{
 94	percpu_counter_sub(&nn->counter[NFSD_NET_DRC_MEM_USAGE], amount);
 95}
 96
 97#ifdef CONFIG_NFSD_V4
 98static inline void nfsd_stats_wdeleg_getattr_inc(void)
 99{
100	percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_WDELEG_GETATTR]);
101}
102#endif
103#endif /* _NFSD_STATS_H */