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
nfs_inc_server_stats(const struct nfs_server * server,enum nfs_stat_eventcounters stat)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
nfs_inc_stats(const struct inode * inode,enum nfs_stat_eventcounters stat)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
nfs_add_server_stats(const struct nfs_server * server,enum nfs_stat_bytecounters stat,long addend)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
nfs_add_stats(const struct inode * inode,enum nfs_stat_bytecounters stat,long addend)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
nfs_add_fscache_stats(struct inode * inode,enum nfs_stat_fscachecounters stat,long addend)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 #endif
59
nfs_alloc_iostats(void)60 static inline struct nfs_iostats __percpu *nfs_alloc_iostats(void)
61 {
62 return alloc_percpu(struct nfs_iostats);
63 }
64
nfs_free_iostats(struct nfs_iostats __percpu * stats)65 static inline void nfs_free_iostats(struct nfs_iostats __percpu *stats)
66 {
67 if (stats != NULL)
68 free_percpu(stats);
69 }
70
71 #endif /* _NFS_IOSTAT */
72