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Linux/fs/nfs/iostat.h

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  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 #ifdef CONFIG_NFS_FSCACHE
 21         unsigned long long      fscache[__NFSIOS_FSCACHEMAX];
 22 #endif
 23         unsigned long           events[__NFSIOS_COUNTSMAX];
 24 } ____cacheline_aligned;
 25 
 26 static inline void nfs_inc_server_stats(const struct nfs_server *server,
 27                                         enum nfs_stat_eventcounters stat)
 28 {
 29         this_cpu_inc(server->io_stats->events[stat]);
 30 }
 31 
 32 static inline void nfs_inc_stats(const struct inode *inode,
 33                                  enum nfs_stat_eventcounters stat)
 34 {
 35         nfs_inc_server_stats(NFS_SERVER(inode), stat);
 36 }
 37 
 38 static inline void nfs_add_server_stats(const struct nfs_server *server,
 39                                         enum nfs_stat_bytecounters stat,
 40                                         long addend)
 41 {
 42         this_cpu_add(server->io_stats->bytes[stat], addend);
 43 }
 44 
 45 static inline void nfs_add_stats(const struct inode *inode,
 46                                  enum nfs_stat_bytecounters stat,
 47                                  long addend)
 48 {
 49         nfs_add_server_stats(NFS_SERVER(inode), stat, addend);
 50 }
 51 
 52 #ifdef CONFIG_NFS_FSCACHE
 53 static inline void nfs_add_fscache_stats(struct inode *inode,
 54                                          enum nfs_stat_fscachecounters stat,
 55                                          long addend)
 56 {
 57         this_cpu_add(NFS_SERVER(inode)->io_stats->fscache[stat], addend);
 58 }
 59 static inline void nfs_inc_fscache_stats(struct inode *inode,
 60                                          enum nfs_stat_fscachecounters stat)
 61 {
 62         this_cpu_inc(NFS_SERVER(inode)->io_stats->fscache[stat]);
 63 }
 64 #endif
 65 
 66 static inline struct nfs_iostats __percpu *nfs_alloc_iostats(void)
 67 {
 68         return alloc_percpu(struct nfs_iostats);
 69 }
 70 
 71 static inline void nfs_free_iostats(struct nfs_iostats __percpu *stats)
 72 {
 73         if (stats != NULL)
 74                 free_percpu(stats);
 75 }
 76 
 77 #endif /* _NFS_IOSTAT */
 78 

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