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
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