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 */ 62