6a51091d07
Add some new NFS I/O counters for FS-Cache doing things for NFS. A new line is emitted into /proc/pid/mountstats if caching is enabled that looks like: fsc: <rok> <rfl> <wok> <wfl> <unc> Where <rok> is the number of pages read successfully from the cache, <rfl> is the number of failed page reads against the cache, <wok> is the number of successful page writes to the cache, <wfl> is the number of failed page writes to the cache, and <unc> is the number of NFS pages that have been disconnected from the cache. Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Steve Dickson <steved@redhat.com> Acked-by: Trond Myklebust <Trond.Myklebust@netapp.com> Acked-by: Al Viro <viro@zeniv.linux.org.uk> Tested-by: Daire Byrne <Daire.Byrne@framestore.com>
90 lines
2 KiB
C
90 lines
2 KiB
C
/*
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* linux/fs/nfs/iostat.h
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*
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* Declarations for NFS client per-mount statistics
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*
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* Copyright (C) 2005, 2006 Chuck Lever <cel@netapp.com>
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*
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*/
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#ifndef _NFS_IOSTAT
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#define _NFS_IOSTAT
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#include <linux/percpu.h>
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#include <linux/cache.h>
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#include <linux/nfs_iostat.h>
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struct nfs_iostats {
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unsigned long long bytes[__NFSIOS_BYTESMAX];
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#ifdef CONFIG_NFS_FSCACHE
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unsigned long long fscache[__NFSIOS_FSCACHEMAX];
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#endif
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unsigned long events[__NFSIOS_COUNTSMAX];
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} ____cacheline_aligned;
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static inline void nfs_inc_server_stats(const struct nfs_server *server,
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enum nfs_stat_eventcounters stat)
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{
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struct nfs_iostats *iostats;
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int cpu;
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cpu = get_cpu();
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iostats = per_cpu_ptr(server->io_stats, cpu);
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iostats->events[stat]++;
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put_cpu_no_resched();
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}
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static inline void nfs_inc_stats(const struct inode *inode,
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enum nfs_stat_eventcounters stat)
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{
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nfs_inc_server_stats(NFS_SERVER(inode), stat);
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}
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static inline void nfs_add_server_stats(const struct nfs_server *server,
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enum nfs_stat_bytecounters stat,
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unsigned long addend)
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{
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struct nfs_iostats *iostats;
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int cpu;
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cpu = get_cpu();
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iostats = per_cpu_ptr(server->io_stats, cpu);
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iostats->bytes[stat] += addend;
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put_cpu_no_resched();
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}
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static inline void nfs_add_stats(const struct inode *inode,
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enum nfs_stat_bytecounters stat,
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unsigned long addend)
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{
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nfs_add_server_stats(NFS_SERVER(inode), stat, addend);
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}
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#ifdef CONFIG_NFS_FSCACHE
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static inline void nfs_add_fscache_stats(struct inode *inode,
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enum nfs_stat_fscachecounters stat,
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unsigned long addend)
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{
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struct nfs_iostats *iostats;
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int cpu;
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cpu = get_cpu();
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iostats = per_cpu_ptr(NFS_SERVER(inode)->io_stats, cpu);
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iostats->fscache[stat] += addend;
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put_cpu_no_resched();
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}
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#endif
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static inline struct nfs_iostats *nfs_alloc_iostats(void)
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{
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return alloc_percpu(struct nfs_iostats);
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}
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static inline void nfs_free_iostats(struct nfs_iostats *stats)
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{
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if (stats != NULL)
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free_percpu(stats);
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}
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#endif /* _NFS_IOSTAT */
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