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 struct nfs_iostats *iostats; 29 int cpu; 30 31 cpu = get_cpu(); 32 iostats = per_cpu_ptr(server->io_stats, cpu); 33 iostats->events[stat]++; 34 put_cpu(); 35 } 36 37 static inline void nfs_inc_stats(const struct inode *inode, 38 enum nfs_stat_eventcounters stat) 39 { 40 nfs_inc_server_stats(NFS_SERVER(inode), stat); 41 } 42 43 static inline void nfs_add_server_stats(const struct nfs_server *server, 44 enum nfs_stat_bytecounters stat, 45 unsigned long addend) 46 { 47 struct nfs_iostats *iostats; 48 int cpu; 49 50 cpu = get_cpu(); 51 iostats = per_cpu_ptr(server->io_stats, cpu); 52 iostats->bytes[stat] += addend; 53 put_cpu(); 54 } 55 56 static inline void nfs_add_stats(const struct inode *inode, 57 enum nfs_stat_bytecounters stat, 58 unsigned long addend) 59 { 60 nfs_add_server_stats(NFS_SERVER(inode), stat, addend); 61 } 62 63 #ifdef CONFIG_NFS_FSCACHE 64 static inline void nfs_add_fscache_stats(struct inode *inode, 65 enum nfs_stat_fscachecounters stat, 66 unsigned long addend) 67 { 68 struct nfs_iostats *iostats; 69 int cpu; 70 71 cpu = get_cpu(); 72 iostats = per_cpu_ptr(NFS_SERVER(inode)->io_stats, cpu); 73 iostats->fscache[stat] += addend; 74 put_cpu(); 75 } 76 #endif 77 78 static inline struct nfs_iostats *nfs_alloc_iostats(void) 79 { 80 return alloc_percpu(struct nfs_iostats); 81 } 82 83 static inline void nfs_free_iostats(struct nfs_iostats *stats) 84 { 85 if (stats != NULL) 86 free_percpu(stats); 87 } 88 89 #endif /* _NFS_IOSTAT */ 90