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> <deprecated filehandle cache stats> 11 * statistics for filehandle lookup 12 * io <bytes-read> <bytes-written> 13 * statistics for IO throughput 14 * th <threads> <deprecated thread usage histogram stats> 15 * number of threads 16 * ra <deprecated ra-cache stats> 17 * 18 * plus generic RPC stats (see net/sunrpc/stats.c) 19 * 20 * Copyright (C) 1995, 1996, 1997 Olaf Kirch <okir@monad.swb.de> 21 */ 22 23 #include <linux/seq_file.h> 24 #include <linux/module.h> 25 #include <linux/sunrpc/stats.h> 26 #include <net/net_namespace.h> 27 28 #include "nfsd.h" 29 #include "netns.h" 30 #include "stats.h" 31 32 static int nfsd_show(struct seq_file *seq, void *v) 33 { 34 struct net *net = pde_data(file_inode(seq->file)); 35 struct nfsd_net *nn = net_generic(net, nfsd_net_id); 36 int i; 37 38 seq_printf(seq, "rc %lld %lld %lld\nfh %lld 0 0 0 0\nio %lld %lld\n", 39 percpu_counter_sum_positive(&nn->counter[NFSD_STATS_RC_HITS]), 40 percpu_counter_sum_positive(&nn->counter[NFSD_STATS_RC_MISSES]), 41 percpu_counter_sum_positive(&nn->counter[NFSD_STATS_RC_NOCACHE]), 42 percpu_counter_sum_positive(&nn->counter[NFSD_STATS_FH_STALE]), 43 percpu_counter_sum_positive(&nn->counter[NFSD_STATS_IO_READ]), 44 percpu_counter_sum_positive(&nn->counter[NFSD_STATS_IO_WRITE])); 45 46 /* thread usage: */ 47 seq_printf(seq, "th %u 0", atomic_read(&nfsd_th_cnt)); 48 49 /* deprecated thread usage histogram stats */ 50 for (i = 0; i < 10; i++) 51 seq_puts(seq, " 0.000"); 52 53 /* deprecated ra-cache stats */ 54 seq_puts(seq, "\nra 0 0 0 0 0 0 0 0 0 0 0 0\n"); 55 56 /* show my rpc info */ 57 svc_seq_show(seq, &nn->nfsd_svcstats); 58 59 #ifdef CONFIG_NFSD_V4 60 /* Show count for individual nfsv4 operations */ 61 /* Writing operation numbers 0 1 2 also for maintaining uniformity */ 62 seq_printf(seq, "proc4ops %u", LAST_NFS4_OP + 1); 63 for (i = 0; i <= LAST_NFS4_OP; i++) { 64 seq_printf(seq, " %lld", 65 percpu_counter_sum_positive(&nn->counter[NFSD_STATS_NFS4_OP(i)])); 66 } 67 seq_printf(seq, "\nwdeleg_getattr %lld", 68 percpu_counter_sum_positive(&nn->cb_counter[OP_CB_GETATTR])); 69 70 seq_putc(seq, '\n'); 71 #endif 72 73 return 0; 74 } 75 76 DEFINE_PROC_SHOW_ATTRIBUTE(nfsd); 77 78 struct proc_dir_entry *nfsd_proc_stat_init(struct net *net) 79 { 80 struct nfsd_net *nn = net_generic(net, nfsd_net_id); 81 82 return svc_proc_register(net, &nn->nfsd_svcstats, &nfsd_proc_ops); 83 } 84 85 void nfsd_proc_stat_shutdown(struct net *net) 86 { 87 svc_proc_unregister(net, "nfsd"); 88 } 89