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
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