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