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(fbc: &nfsdstats.counter[NFSD_STATS_RC_HITS]);
49}
50
51static inline void nfsd_stats_rc_misses_inc(void)
52{
53 percpu_counter_inc(fbc: &nfsdstats.counter[NFSD_STATS_RC_MISSES]);
54}
55
56static inline void nfsd_stats_rc_nocache_inc(void)
57{
58 percpu_counter_inc(fbc: &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(fbc: &nfsdstats.counter[NFSD_STATS_FH_STALE]);
64 if (exp && exp->ex_stats)
65 percpu_counter_inc(fbc: &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(fbc: &nfsdstats.counter[NFSD_STATS_IO_READ], amount);
71 if (exp && exp->ex_stats)
72 percpu_counter_add(fbc: &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(fbc: &nfsdstats.counter[NFSD_STATS_IO_WRITE], amount);
78 if (exp && exp->ex_stats)
79 percpu_counter_add(fbc: &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(fbc: &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(fbc: &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(fbc: &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(fbc: &nfsdstats.counter[NFSD_STATS_WDELEG_GETATTR]);
101}
102#endif
103#endif /* _NFSD_STATS_H */
104

source code of linux/fs/nfsd/stats.h