fs/nfs/iostat.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  *  linux/fs/nfs/iostat.h
   4  *
   5  *  Declarations for NFS client per-mount statistics
   6  *
   7  *  Copyright (C) 2005, 2006 Chuck Lever <cel@netapp.com>
   8  *
   9  */
  10
  11 #ifndef _NFS_IOSTAT
  12 #define _NFS_IOSTAT
  13
  14 #include <linux/percpu.h>
  15 #include <linux/cache.h>
  16 #include <linux/nfs_iostat.h>
  17
  18 struct nfs_iostats {
  19         unsigned long long      bytes[__NFSIOS_BYTESMAX];
  20         unsigned long           events[__NFSIOS_COUNTSMAX];
  21 } ____cacheline_aligned;
  22
  23 static inline void nfs_inc_server_stats(const struct nfs_server *server,
  24                                         enum nfs_stat_eventcounters stat)
  25 {
  26         this_cpu_inc(server->io_stats->events[stat]);
  27 }
  28
  29 static inline void nfs_inc_stats(const struct inode *inode,
  30                                  enum nfs_stat_eventcounters stat)
  31 {
  32         nfs_inc_server_stats(NFS_SERVER(inode), stat);
  33 }
  34
  35 static inline void nfs_add_server_stats(const struct nfs_server *server,
  36                                         enum nfs_stat_bytecounters stat,
  37                                         long addend)
  38 {
  39         this_cpu_add(server->io_stats->bytes[stat], addend);
  40 }
  41
  42 static inline void nfs_add_stats(const struct inode *inode,
  43                                  enum nfs_stat_bytecounters stat,
  44                                  long addend)
  45 {
  46         nfs_add_server_stats(NFS_SERVER(inode), stat, addend);
  47 }
  48
  49 /*
  50  * This specialized allocator has to be a macro for its allocations to be
  51  * accounted separately (to have a separate alloc_tag).
  52  */
  53 #define nfs_alloc_iostats()     alloc_percpu(struct nfs_iostats)
  54
  55 static inline void nfs_free_iostats(struct nfs_iostats __percpu *stats)
  56 {
  57         if (stats != NULL)
  58                 free_percpu(stats);
  59 }
  60
  61 #endif /* _NFS_IOSTAT */