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 30 static int nfsd_show(struct seq_file *seq, void *v) 31 { 32 struct net *net = pde_data(file_inode(seq->file)); 33 struct nfsd_net *nn = net_generic(net, nfsd_net_id); 34 int i; 35 36 seq_printf(seq, "rc %lld %lld %lld\nfh %lld 0 0 0 0\nio %lld %lld\n", 37 percpu_counter_sum_positive(&nn->counter[NFSD_STATS_RC_HITS]), 38 percpu_counter_sum_positive(&nn->counter[NFSD_STATS_RC_MISSES]), 39 percpu_counter_sum_positive(&nn->counter[NFSD_STATS_RC_NOCACHE]), 40 percpu_counter_sum_positive(&nn->counter[NFSD_STATS_FH_STALE]), 41 percpu_counter_sum_positive(&nn->counter[NFSD_STATS_IO_READ]), 42 percpu_counter_sum_positive(&nn->counter[NFSD_STATS_IO_WRITE])); 43 44 /* thread usage: */ 45 seq_printf(seq, "th %u 0", atomic_read(&nfsd_th_cnt)); 46 47 /* deprecated thread usage histogram stats */ 48 for (i = 0; i < 10; i++) 49 seq_puts(seq, " 0.000"); 50 51 /* deprecated ra-cache stats */ 52 seq_puts(seq, "\nra 0 0 0 0 0 0 0 0 0 0 0 0\n"); 53 54 /* show my rpc info */ 55 svc_seq_show(seq, &nn->nfsd_svcstats); 56 57 #ifdef CONFIG_NFSD_V4 58 /* Show count for individual nfsv4 operations */ 59 /* Writing operation numbers 0 1 2 also for maintaining uniformity */ 60 seq_printf(seq, "proc4ops %u", LAST_NFS4_OP + 1); 61 for (i = 0; i <= LAST_NFS4_OP; i++) { 62 seq_printf(seq, " %lld", 63 percpu_counter_sum_positive(&nn->counter[NFSD_STATS_NFS4_OP(i)])); 64 } 65 seq_printf(seq, "\nwdeleg_getattr %lld", 66 percpu_counter_sum_positive(&nn->counter[NFSD_STATS_WDELEG_GETATTR])); 67 68 seq_putc(seq, '\n'); 69 #endif 70 71 return 0; 72 } 73 74 DEFINE_PROC_SHOW_ATTRIBUTE(nfsd); 75 76 int nfsd_percpu_counters_init(struct percpu_counter *counters, int num) 77 { 78 int i, err = 0; 79 80 for (i = 0; !err && i < num; i++) 81 err = percpu_counter_init(&counters[i], 0, GFP_KERNEL); 82 83 if (!err) 84 return 0; 85 86 for (; i > 0; i--) 87 percpu_counter_destroy(&counters[i-1]); 88 89 return err; 90 } 91 92 void nfsd_percpu_counters_reset(struct percpu_counter counters[], int num) 93 { 94 int i; 95 96 for (i = 0; i < num; i++) 97 percpu_counter_set(&counters[i], 0); 98 } 99 100 void nfsd_percpu_counters_destroy(struct percpu_counter counters[], int num) 101 { 102 int i; 103 104 for (i = 0; i < num; i++) 105 percpu_counter_destroy(&counters[i]); 106 } 107 108 int nfsd_stat_counters_init(struct nfsd_net *nn) 109 { 110 return nfsd_percpu_counters_init(nn->counter, NFSD_STATS_COUNTERS_NUM); 111 } 112 113 void nfsd_stat_counters_destroy(struct nfsd_net *nn) 114 { 115 nfsd_percpu_counters_destroy(nn->counter, NFSD_STATS_COUNTERS_NUM); 116 } 117 118 void nfsd_proc_stat_init(struct net *net) 119 { 120 struct nfsd_net *nn = net_generic(net, nfsd_net_id); 121 122 svc_proc_register(net, &nn->nfsd_svcstats, &nfsd_proc_ops); 123 } 124 125 void nfsd_proc_stat_shutdown(struct net *net) 126 { 127 svc_proc_unregister(net, "nfsd"); 128 } 129