fs/nfsd/stats.h

   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
  45 static inline void nfsd_stats_rc_hits_inc(void)
  46 {
  47         percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_RC_HITS]);
  48 }
  49
  50 static inline void nfsd_stats_rc_misses_inc(void)
  51 {
  52         percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_RC_MISSES]);
  53 }
  54
  55 static inline void nfsd_stats_rc_nocache_inc(void)
  56 {
  57         percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_RC_NOCACHE]);
  58 }
  59
  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
  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
  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
  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
  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
  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 */