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 NFSD_STATS_WDELEG_GETATTR, /* count of getattr conflict with wdeleg */
26 #endif
27 NFSD_STATS_COUNTERS_NUM
28 };
29
30 struct nfsd_stats {
31 struct percpu_counter counter[NFSD_STATS_COUNTERS_NUM];
32
33 atomic_t th_cnt; /* number of available threads */
34 };
35
36 extern struct nfsd_stats nfsdstats;
37
38 extern struct svc_stat nfsd_svcstats;
39
40 int nfsd_percpu_counters_init(struct percpu_counter counters[], int num);
41 void nfsd_percpu_counters_reset(struct percpu_counter counters[], int num);
42 void nfsd_percpu_counters_destroy(struct percpu_counter counters[], int num);
43 int nfsd_stat_init(void);
44 void nfsd_stat_shutdown(void);
45
nfsd_stats_rc_hits_inc(void)46 static inline void nfsd_stats_rc_hits_inc(void)
47 {
48 percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_RC_HITS]);
49 }
50
nfsd_stats_rc_misses_inc(void)51 static inline void nfsd_stats_rc_misses_inc(void)
52 {
53 percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_RC_MISSES]);
54 }
55
nfsd_stats_rc_nocache_inc(void)56 static inline void nfsd_stats_rc_nocache_inc(void)
57 {
58 percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_RC_NOCACHE]);
59 }
60
nfsd_stats_fh_stale_inc(struct svc_export * exp)61 static 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)
65 percpu_counter_inc(&exp->ex_stats.counter[EXP_STATS_FH_STALE]);
66 }
67
nfsd_stats_io_read_add(struct svc_export * exp,s64 amount)68 static 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)
72 percpu_counter_add(&exp->ex_stats.counter[EXP_STATS_IO_READ], amount);
73 }
74
nfsd_stats_io_write_add(struct svc_export * exp,s64 amount)75 static 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)
79 percpu_counter_add(&exp->ex_stats.counter[EXP_STATS_IO_WRITE], amount);
80 }
81
nfsd_stats_payload_misses_inc(struct nfsd_net * nn)82 static inline void nfsd_stats_payload_misses_inc(struct nfsd_net *nn)
83 {
84 percpu_counter_inc(&nn->counter[NFSD_NET_PAYLOAD_MISSES]);
85 }
86
nfsd_stats_drc_mem_usage_add(struct nfsd_net * nn,s64 amount)87 static 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
nfsd_stats_drc_mem_usage_sub(struct nfsd_net * nn,s64 amount)92 static 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
nfsd_stats_wdeleg_getattr_inc(void)98 static 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 */
104