1 /* 2 * linux/fs/nfsd/stats.c 3 * 4 * procfs-based user access to knfsd statistics 5 * 6 * /proc/net/rpc/nfsd 7 * 8 * Format: 9 * rc <hits> <misses> <nocache> 10 * Statistsics for the reply cache 11 * fh <stale> <total-lookups> <anonlookups> <dir-not-in-dcache> <nondir-not-in-dcache> 12 * statistics for filehandle lookup 13 * io <bytes-read> <bytes-writtten> 14 * statistics for IO throughput 15 * th <threads> <fullcnt> <10%-20%> <20%-30%> ... <90%-100%> <100%> 16 * time (seconds) when nfsd thread usage above thresholds 17 * and number of times that all threads were in use 18 * ra cache-size <10% <20% <30% ... <100% not-found 19 * number of times that read-ahead entry was found that deep in 20 * the cache. 21 * plus generic RPC stats (see net/sunrpc/stats.c) 22 * 23 * Copyright (C) 1995, 1996, 1997 Olaf Kirch <okir@monad.swb.de> 24 */ 25 26 #include <linux/kernel.h> 27 #include <linux/time.h> 28 #include <linux/proc_fs.h> 29 #include <linux/seq_file.h> 30 #include <linux/stat.h> 31 #include <linux/module.h> 32 33 #include <linux/sunrpc/svc.h> 34 #include <linux/sunrpc/stats.h> 35 #include <linux/nfsd/nfsd.h> 36 #include <linux/nfsd/stats.h> 37 38 struct nfsd_stats nfsdstats; 39 struct svc_stat nfsd_svcstats = { 40 .program = &nfsd_program, 41 }; 42 43 static int nfsd_proc_show(struct seq_file *seq, void *v) 44 { 45 int i; 46 47 seq_printf(seq, "rc %u %u %u\nfh %u %u %u %u %u\nio %u %u\n", 48 nfsdstats.rchits, 49 nfsdstats.rcmisses, 50 nfsdstats.rcnocache, 51 nfsdstats.fh_stale, 52 nfsdstats.fh_lookup, 53 nfsdstats.fh_anon, 54 nfsdstats.fh_nocache_dir, 55 nfsdstats.fh_nocache_nondir, 56 nfsdstats.io_read, 57 nfsdstats.io_write); 58 /* thread usage: */ 59 seq_printf(seq, "th %u %u", nfsdstats.th_cnt, nfsdstats.th_fullcnt); 60 for (i=0; i<10; i++) { 61 unsigned int jifs = nfsdstats.th_usage[i]; 62 unsigned int sec = jifs / HZ, msec = (jifs % HZ)*1000/HZ; 63 seq_printf(seq, " %u.%03u", sec, msec); 64 } 65 66 /* newline and ra-cache */ 67 seq_printf(seq, "\nra %u", nfsdstats.ra_size); 68 for (i=0; i<11; i++) 69 seq_printf(seq, " %u", nfsdstats.ra_depth[i]); 70 seq_putc(seq, '\n'); 71 72 /* show my rpc info */ 73 svc_seq_show(seq, &nfsd_svcstats); 74 75 return 0; 76 } 77 78 static int nfsd_proc_open(struct inode *inode, struct file *file) 79 { 80 return single_open(file, nfsd_proc_show, NULL); 81 } 82 83 static struct file_operations nfsd_proc_fops = { 84 .owner = THIS_MODULE, 85 .open = nfsd_proc_open, 86 .read = seq_read, 87 .llseek = seq_lseek, 88 .release = single_release, 89 }; 90 91 void 92 nfsd_stat_init(void) 93 { 94 svc_proc_register(&nfsd_svcstats, &nfsd_proc_fops); 95 } 96 97 void 98 nfsd_stat_shutdown(void) 99 { 100 svc_proc_unregister("nfsd"); 101 } 102