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 /* Protected by nfsd_mutex */
33 unsigned int th_cnt; /* number of available threads */
34 };
35
36
37 extern struct nfsd_stats nfsdstats;
38
39 extern struct svc_stat nfsd_svcstats;
40
41 int nfsd_percpu_counters_init(struct percpu_counter counters[], int num);
42 void nfsd_percpu_counters_reset(struct percpu_counter counters[], int num);
43 void nfsd_percpu_counters_destroy(struct percpu_counter counters[], int num);
44 int nfsd_stat_init(void);
45 void nfsd_stat_shutdown(void);
46
nfsd_stats_rc_hits_inc(void)47 static inline void nfsd_stats_rc_hits_inc(void)
48 {
49 percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_RC_HITS]);
50 }
51
nfsd_stats_rc_misses_inc(void)52 static inline void nfsd_stats_rc_misses_inc(void)
53 {
54 percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_RC_MISSES]);
55 }
56
nfsd_stats_rc_nocache_inc(void)57 static inline void nfsd_stats_rc_nocache_inc(void)
58 {
59 percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_RC_NOCACHE]);
60 }
61
nfsd_stats_fh_stale_inc(struct svc_export * exp)62 static 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
nfsd_stats_io_read_add(struct svc_export * exp,s64 amount)69 static 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
nfsd_stats_io_write_add(struct svc_export * exp,s64 amount)76 static 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
nfsd_stats_payload_misses_inc(struct nfsd_net * nn)83 static inline void nfsd_stats_payload_misses_inc(struct nfsd_net *nn)
84 {
85 percpu_counter_inc(&nn->counter[NFSD_NET_PAYLOAD_MISSES]);
86 }
87
nfsd_stats_drc_mem_usage_add(struct nfsd_net * nn,s64 amount)88 static 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
nfsd_stats_drc_mem_usage_sub(struct nfsd_net * nn,s64 amount)93 static 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 */
99