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#endif
26	NFSD_STATS_COUNTERS_NUM
27};
28
29struct nfsd_stats {
30	struct percpu_counter	counter[NFSD_STATS_COUNTERS_NUM];
31
32	/* Protected by nfsd_mutex */
33	unsigned int	th_cnt;		/* number of available threads */
34};
35
36
37extern struct nfsd_stats	nfsdstats;
38
39extern struct svc_stat		nfsd_svcstats;
40
41int nfsd_percpu_counters_init(struct percpu_counter counters[], int num);
42void nfsd_percpu_counters_reset(struct percpu_counter counters[], int num);
43void nfsd_percpu_counters_destroy(struct percpu_counter counters[], int num);
44int nfsd_stat_init(void);
45void nfsd_stat_shutdown(void);
46
47static inline void nfsd_stats_rc_hits_inc(void)
48{
49	percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_RC_HITS]);
50}
51
52static inline void nfsd_stats_rc_misses_inc(void)
53{
54	percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_RC_MISSES]);
55}
56
57static inline void nfsd_stats_rc_nocache_inc(void)
58{
59	percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_RC_NOCACHE]);
60}
61
62static inline void nfsd_stats_fh_stale_inc(struct svc_export *exp)
63{
64	percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_FH_STALE]);
65	if (exp)
66		percpu_counter_inc(&exp->ex_stats.counter[EXP_STATS_FH_STALE]);
67}
68
69static inline void nfsd_stats_io_read_add(struct svc_export *exp, s64 amount)
70{
71	percpu_counter_add(&nfsdstats.counter[NFSD_STATS_IO_READ], amount);
72	if (exp)
73		percpu_counter_add(&exp->ex_stats.counter[EXP_STATS_IO_READ], amount);
74}
75
76static inline void nfsd_stats_io_write_add(struct svc_export *exp, s64 amount)
77{
78	percpu_counter_add(&nfsdstats.counter[NFSD_STATS_IO_WRITE], amount);
79	if (exp)
80		percpu_counter_add(&exp->ex_stats.counter[EXP_STATS_IO_WRITE], amount);
81}
82
83static inline void nfsd_stats_payload_misses_inc(struct nfsd_net *nn)
84{
85	percpu_counter_inc(&nn->counter[NFSD_NET_PAYLOAD_MISSES]);
86}
87
88static inline void nfsd_stats_drc_mem_usage_add(struct nfsd_net *nn, s64 amount)
89{
90	percpu_counter_add(&nn->counter[NFSD_NET_DRC_MEM_USAGE], amount);
91}
92
93static inline void nfsd_stats_drc_mem_usage_sub(struct nfsd_net *nn, s64 amount)
94{
95	percpu_counter_sub(&nn->counter[NFSD_NET_DRC_MEM_USAGE], amount);
96}
97
98#endif /* _NFSD_STATS_H */