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         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
  46 static inline void nfsd_stats_rc_hits_inc(void)
  47 {
  48         percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_RC_HITS]);
  49 }
  50
  51 static inline void nfsd_stats_rc_misses_inc(void)
  52 {
  53         percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_RC_MISSES]);
  54 }
  55
  56 static inline void nfsd_stats_rc_nocache_inc(void)
  57 {
  58         percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_RC_NOCACHE]);
  59 }
  60
  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 && exp->ex_stats)
  65                 percpu_counter_inc(&exp->ex_stats->counter[EXP_STATS_FH_STALE]);
  66 }
  67
  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 && exp->ex_stats)
  72                 percpu_counter_add(&exp->ex_stats->counter[EXP_STATS_IO_READ], amount);
  73 }
  74
  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 && exp->ex_stats)
  79                 percpu_counter_add(&exp->ex_stats->counter[EXP_STATS_IO_WRITE], amount);
  80 }
  81
  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
  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
  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
  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 */