4b6f5d20b0
This is a conversion to make the various file_operations structs in fs/ const. Basically a regexp job, with a few manual fixups The goal is both to increase correctness (harder to accidentally write to shared datastructures) and reducing the false sharing of cachelines with things that get dirty in .data (while .rodata is nicely read only and thus cache clean) Signed-off-by: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
102 lines
2.5 KiB
C
102 lines
2.5 KiB
C
/*
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* linux/fs/nfsd/stats.c
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*
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* procfs-based user access to knfsd statistics
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*
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* /proc/net/rpc/nfsd
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*
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* Format:
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* rc <hits> <misses> <nocache>
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* Statistsics for the reply cache
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* fh <stale> <total-lookups> <anonlookups> <dir-not-in-dcache> <nondir-not-in-dcache>
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* statistics for filehandle lookup
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* io <bytes-read> <bytes-writtten>
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* statistics for IO throughput
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* th <threads> <fullcnt> <10%-20%> <20%-30%> ... <90%-100%> <100%>
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* time (seconds) when nfsd thread usage above thresholds
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* and number of times that all threads were in use
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* ra cache-size <10% <20% <30% ... <100% not-found
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* number of times that read-ahead entry was found that deep in
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* the cache.
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* plus generic RPC stats (see net/sunrpc/stats.c)
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*
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* Copyright (C) 1995, 1996, 1997 Olaf Kirch <okir@monad.swb.de>
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*/
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#include <linux/kernel.h>
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#include <linux/time.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include <linux/stat.h>
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#include <linux/module.h>
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#include <linux/sunrpc/svc.h>
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#include <linux/sunrpc/stats.h>
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#include <linux/nfsd/nfsd.h>
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#include <linux/nfsd/stats.h>
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struct nfsd_stats nfsdstats;
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struct svc_stat nfsd_svcstats = {
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.program = &nfsd_program,
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};
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static int nfsd_proc_show(struct seq_file *seq, void *v)
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{
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int i;
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seq_printf(seq, "rc %u %u %u\nfh %u %u %u %u %u\nio %u %u\n",
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nfsdstats.rchits,
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nfsdstats.rcmisses,
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nfsdstats.rcnocache,
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nfsdstats.fh_stale,
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nfsdstats.fh_lookup,
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nfsdstats.fh_anon,
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nfsdstats.fh_nocache_dir,
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nfsdstats.fh_nocache_nondir,
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nfsdstats.io_read,
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nfsdstats.io_write);
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/* thread usage: */
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seq_printf(seq, "th %u %u", nfsdstats.th_cnt, nfsdstats.th_fullcnt);
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for (i=0; i<10; i++) {
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unsigned int jifs = nfsdstats.th_usage[i];
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unsigned int sec = jifs / HZ, msec = (jifs % HZ)*1000/HZ;
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seq_printf(seq, " %u.%03u", sec, msec);
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}
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/* newline and ra-cache */
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seq_printf(seq, "\nra %u", nfsdstats.ra_size);
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for (i=0; i<11; i++)
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seq_printf(seq, " %u", nfsdstats.ra_depth[i]);
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seq_putc(seq, '\n');
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/* show my rpc info */
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svc_seq_show(seq, &nfsd_svcstats);
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return 0;
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}
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static int nfsd_proc_open(struct inode *inode, struct file *file)
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{
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return single_open(file, nfsd_proc_show, NULL);
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}
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static const struct file_operations nfsd_proc_fops = {
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.owner = THIS_MODULE,
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.open = nfsd_proc_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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void
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nfsd_stat_init(void)
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{
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svc_proc_register(&nfsd_svcstats, &nfsd_proc_fops);
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}
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void
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nfsd_stat_shutdown(void)
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{
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svc_proc_unregister("nfsd");
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}
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