1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * procfs-based user access to knfsd statistics 4 * 5 * /proc/net/rpc/nfsd 6 * 7 * Format: 8 * rc <hits> <misses> <nocache> 9 * Statistsics for the reply cache 10 * fh <stale> <total-lookups> <anonlookups> <dir-not-in-dcache> <nondir-not-in-dcache> 11 * statistics for filehandle lookup 12 * io <bytes-read> <bytes-written> 13 * statistics for IO throughput 14 * th <threads> <fullcnt> <10%-20%> <20%-30%> ... <90%-100%> <100%> 15 * time (seconds) when nfsd thread usage above thresholds 16 * and number of times that all threads were in use 17 * ra cache-size <10% <20% <30% ... <100% not-found 18 * number of times that read-ahead entry was found that deep in 19 * the cache. 20 * plus generic RPC stats (see net/sunrpc/stats.c) 21 * 22 * Copyright (C) 1995, 1996, 1997 Olaf Kirch <okir@monad.swb.de> 23 */ 24 25 #include <linux/seq_file.h> 26 #include <linux/module.h> 27 #include <linux/sunrpc/stats.h> 28 #include <net/net_namespace.h> 29 30 #include "nfsd.h" 31 32 struct nfsd_stats nfsdstats; 33 struct svc_stat nfsd_svcstats = { 34 .program = &nfsd_program, 35 }; 36 37 static int nfsd_proc_show(struct seq_file *seq, void *v) 38 { 39 int i; 40 41 seq_printf(seq, "rc %u %u %u\nfh %u %u %u %u %u\nio %u %u\n", 42 nfsdstats.rchits, 43 nfsdstats.rcmisses, 44 nfsdstats.rcnocache, 45 nfsdstats.fh_stale, 46 nfsdstats.fh_lookup, 47 nfsdstats.fh_anon, 48 nfsdstats.fh_nocache_dir, 49 nfsdstats.fh_nocache_nondir, 50 nfsdstats.io_read, 51 nfsdstats.io_write); 52 /* thread usage: */ 53 seq_printf(seq, "th %u %u", nfsdstats.th_cnt, nfsdstats.th_fullcnt); 54 for (i=0; i<10; i++) { 55 unsigned int jifs = nfsdstats.th_usage[i]; 56 unsigned int sec = jifs / HZ, msec = (jifs % HZ)*1000/HZ; 57 seq_printf(seq, " %u.%03u", sec, msec); 58 } 59 60 /* newline and ra-cache */ 61 seq_printf(seq, "\nra %u", nfsdstats.ra_size); 62 for (i=0; i<11; i++) 63 seq_printf(seq, " %u", nfsdstats.ra_depth[i]); 64 seq_putc(seq, '\n'); 65 66 /* show my rpc info */ 67 svc_seq_show(seq, &nfsd_svcstats); 68 69 #ifdef CONFIG_NFSD_V4 70 /* Show count for individual nfsv4 operations */ 71 /* Writing operation numbers 0 1 2 also for maintaining uniformity */ 72 seq_printf(seq,"proc4ops %u", LAST_NFS4_OP + 1); 73 for (i = 0; i <= LAST_NFS4_OP; i++) 74 seq_printf(seq, " %u", nfsdstats.nfs4_opcount[i]); 75 76 seq_putc(seq, '\n'); 77 #endif 78 79 return 0; 80 } 81 82 static int nfsd_proc_open(struct inode *inode, struct file *file) 83 { 84 return single_open(file, nfsd_proc_show, NULL); 85 } 86 87 static const struct file_operations nfsd_proc_fops = { 88 .open = nfsd_proc_open, 89 .read = seq_read, 90 .llseek = seq_lseek, 91 .release = single_release, 92 }; 93 94 void 95 nfsd_stat_init(void) 96 { 97 svc_proc_register(&init_net, &nfsd_svcstats, &nfsd_proc_fops); 98 } 99 100 void 101 nfsd_stat_shutdown(void) 102 { 103 svc_proc_unregister(&init_net, "nfsd"); 104 } 105