1 /* 2 * linux/fs/nfs/iostat.h 3 * 4 * Declarations for NFS client per-mount statistics 5 * 6 * Copyright (C) 2005, 2006 Chuck Lever <cel@netapp.com> 7 * 8 */ 9 10 #ifndef _NFS_IOSTAT 11 #define _NFS_IOSTAT 12 13 #include <linux/percpu.h> 14 #include <linux/cache.h> 15 #include <linux/nfs_iostat.h> 16 17 struct nfs_iostats { 18 unsigned long long bytes[__NFSIOS_BYTESMAX]; 19 #ifdef CONFIG_NFS_FSCACHE 20 unsigned long long fscache[__NFSIOS_FSCACHEMAX]; 21 #endif 22 unsigned long events[__NFSIOS_COUNTSMAX]; 23 } ____cacheline_aligned; 24 25 static inline void nfs_inc_server_stats(const struct nfs_server *server, 26 enum nfs_stat_eventcounters stat) 27 { 28 this_cpu_inc(server->io_stats->events[stat]); 29 } 30 31 static inline void nfs_inc_stats(const struct inode *inode, 32 enum nfs_stat_eventcounters stat) 33 { 34 nfs_inc_server_stats(NFS_SERVER(inode), stat); 35 } 36 37 static inline void nfs_add_server_stats(const struct nfs_server *server, 38 enum nfs_stat_bytecounters stat, 39 long addend) 40 { 41 this_cpu_add(server->io_stats->bytes[stat], addend); 42 } 43 44 static inline void nfs_add_stats(const struct inode *inode, 45 enum nfs_stat_bytecounters stat, 46 long addend) 47 { 48 nfs_add_server_stats(NFS_SERVER(inode), stat, addend); 49 } 50 51 #ifdef CONFIG_NFS_FSCACHE 52 static inline void nfs_add_fscache_stats(struct inode *inode, 53 enum nfs_stat_fscachecounters stat, 54 long addend) 55 { 56 this_cpu_add(NFS_SERVER(inode)->io_stats->fscache[stat], addend); 57 } 58 static inline void nfs_inc_fscache_stats(struct inode *inode, 59 enum nfs_stat_fscachecounters stat) 60 { 61 this_cpu_inc(NFS_SERVER(inode)->io_stats->fscache[stat]); 62 } 63 #endif 64 65 static inline struct nfs_iostats __percpu *nfs_alloc_iostats(void) 66 { 67 return alloc_percpu(struct nfs_iostats); 68 } 69 70 static inline void nfs_free_iostats(struct nfs_iostats __percpu *stats) 71 { 72 if (stats != NULL) 73 free_percpu(stats); 74 } 75 76 #endif /* _NFS_IOSTAT */ 77