/* * linux/fs/nfs/iostat.h * * Declarations for NFS client per-mount statistics * * Copyright (C) 2005, 2006 Chuck Lever <cel@netapp.com> * */ #ifndef _NFS_IOSTAT #define _NFS_IOSTAT #include <linux/percpu.h> #include <linux/cache.h> #include <linux/nfs_iostat.h> struct nfs_iostats { unsigned long long bytes[__NFSIOS_BYTESMAX]; unsigned long events[__NFSIOS_COUNTSMAX]; } ____cacheline_aligned; static inline void nfs_inc_server_stats(const struct nfs_server *server, enum nfs_stat_eventcounters stat) { struct nfs_iostats *iostats; int cpu; cpu = get_cpu(); iostats = per_cpu_ptr(server->io_stats, cpu); iostats->events[stat]++; put_cpu_no_resched(); } static inline void nfs_inc_stats(const struct inode *inode, enum nfs_stat_eventcounters stat) { nfs_inc_server_stats(NFS_SERVER(inode), stat); } static inline void nfs_add_server_stats(const struct nfs_server *server, enum nfs_stat_bytecounters stat, unsigned long addend) { struct nfs_iostats *iostats; int cpu; cpu = get_cpu(); iostats = per_cpu_ptr(server->io_stats, cpu); iostats->bytes[stat] += addend; put_cpu_no_resched(); } static inline void nfs_add_stats(const struct inode *inode, enum nfs_stat_bytecounters stat, unsigned long addend) { nfs_add_server_stats(NFS_SERVER(inode), stat, addend); } static inline struct nfs_iostats *nfs_alloc_iostats(void) { return alloc_percpu(struct nfs_iostats); } static inline void nfs_free_iostats(struct nfs_iostats *stats) { if (stats != NULL) free_percpu(stats); } #endif /* _NFS_IOSTAT */