1 /* 2 * linux/net/sunrpc/stats.c 3 * 4 * procfs-based user access to generic RPC statistics. The stats files 5 * reside in /proc/net/rpc. 6 * 7 * The read routines assume that the buffer passed in is just big enough. 8 * If you implement an RPC service that has its own stats routine which 9 * appends the generic RPC stats, make sure you don't exceed the PAGE_SIZE 10 * limit. 11 * 12 * Copyright (C) 1995, 1996, 1997 Olaf Kirch <okir@monad.swb.de> 13 */ 14 15 #include <linux/module.h> 16 #include <linux/slab.h> 17 18 #include <linux/init.h> 19 #include <linux/kernel.h> 20 #include <linux/proc_fs.h> 21 #include <linux/seq_file.h> 22 #include <linux/sunrpc/clnt.h> 23 #include <linux/sunrpc/svcsock.h> 24 #include <linux/sunrpc/metrics.h> 25 #include <linux/rcupdate.h> 26 27 #include "netns.h" 28 29 #define RPCDBG_FACILITY RPCDBG_MISC 30 31 /* 32 * Get RPC client stats 33 */ 34 static int rpc_proc_show(struct seq_file *seq, void *v) { 35 const struct rpc_stat *statp = seq->private; 36 const struct rpc_program *prog = statp->program; 37 unsigned int i, j; 38 39 seq_printf(seq, 40 "net %u %u %u %u\n", 41 statp->netcnt, 42 statp->netudpcnt, 43 statp->nettcpcnt, 44 statp->nettcpconn); 45 seq_printf(seq, 46 "rpc %u %u %u\n", 47 statp->rpccnt, 48 statp->rpcretrans, 49 statp->rpcauthrefresh); 50 51 for (i = 0; i < prog->nrvers; i++) { 52 const struct rpc_version *vers = prog->version[i]; 53 if (!vers) 54 continue; 55 seq_printf(seq, "proc%u %u", 56 vers->number, vers->nrprocs); 57 for (j = 0; j < vers->nrprocs; j++) 58 seq_printf(seq, " %u", 59 vers->procs[j].p_count); 60 seq_putc(seq, '\n'); 61 } 62 return 0; 63 } 64 65 static int rpc_proc_open(struct inode *inode, struct file *file) 66 { 67 return single_open(file, rpc_proc_show, PDE_DATA(inode)); 68 } 69 70 static const struct file_operations rpc_proc_fops = { 71 .owner = THIS_MODULE, 72 .open = rpc_proc_open, 73 .read = seq_read, 74 .llseek = seq_lseek, 75 .release = single_release, 76 }; 77 78 /* 79 * Get RPC server stats 80 */ 81 void svc_seq_show(struct seq_file *seq, const struct svc_stat *statp) { 82 const struct svc_program *prog = statp->program; 83 const struct svc_procedure *proc; 84 const struct svc_version *vers; 85 unsigned int i, j; 86 87 seq_printf(seq, 88 "net %u %u %u %u\n", 89 statp->netcnt, 90 statp->netudpcnt, 91 statp->nettcpcnt, 92 statp->nettcpconn); 93 seq_printf(seq, 94 "rpc %u %u %u %u %u\n", 95 statp->rpccnt, 96 statp->rpcbadfmt+statp->rpcbadauth+statp->rpcbadclnt, 97 statp->rpcbadfmt, 98 statp->rpcbadauth, 99 statp->rpcbadclnt); 100 101 for (i = 0; i < prog->pg_nvers; i++) { 102 if (!(vers = prog->pg_vers[i]) || !(proc = vers->vs_proc)) 103 continue; 104 seq_printf(seq, "proc%d %u", i, vers->vs_nproc); 105 for (j = 0; j < vers->vs_nproc; j++, proc++) 106 seq_printf(seq, " %u", proc->pc_count); 107 seq_putc(seq, '\n'); 108 } 109 } 110 EXPORT_SYMBOL_GPL(svc_seq_show); 111 112 /** 113 * rpc_alloc_iostats - allocate an rpc_iostats structure 114 * @clnt: RPC program, version, and xprt 115 * 116 */ 117 struct rpc_iostats *rpc_alloc_iostats(struct rpc_clnt *clnt) 118 { 119 return kcalloc(clnt->cl_maxproc, sizeof(struct rpc_iostats), GFP_KERNEL); 120 } 121 EXPORT_SYMBOL_GPL(rpc_alloc_iostats); 122 123 /** 124 * rpc_free_iostats - release an rpc_iostats structure 125 * @stats: doomed rpc_iostats structure 126 * 127 */ 128 void rpc_free_iostats(struct rpc_iostats *stats) 129 { 130 kfree(stats); 131 } 132 EXPORT_SYMBOL_GPL(rpc_free_iostats); 133 134 /** 135 * rpc_count_iostats - tally up per-task stats 136 * @task: completed rpc_task 137 * @stats: array of stat structures 138 * 139 * Relies on the caller for serialization. 140 */ 141 void rpc_count_iostats(const struct rpc_task *task, struct rpc_iostats *stats) 142 { 143 struct rpc_rqst *req = task->tk_rqstp; 144 struct rpc_iostats *op_metrics; 145 ktime_t delta; 146 147 if (!stats || !req) 148 return; 149 150 op_metrics = &stats[task->tk_msg.rpc_proc->p_statidx]; 151 152 op_metrics->om_ops++; 153 op_metrics->om_ntrans += req->rq_ntrans; 154 op_metrics->om_timeouts += task->tk_timeouts; 155 156 op_metrics->om_bytes_sent += req->rq_xmit_bytes_sent; 157 op_metrics->om_bytes_recv += req->rq_reply_bytes_recvd; 158 159 delta = ktime_sub(req->rq_xtime, task->tk_start); 160 op_metrics->om_queue = ktime_add(op_metrics->om_queue, delta); 161 162 op_metrics->om_rtt = ktime_add(op_metrics->om_rtt, req->rq_rtt); 163 164 delta = ktime_sub(ktime_get(), task->tk_start); 165 op_metrics->om_execute = ktime_add(op_metrics->om_execute, delta); 166 } 167 EXPORT_SYMBOL_GPL(rpc_count_iostats); 168 169 static void _print_name(struct seq_file *seq, unsigned int op, 170 struct rpc_procinfo *procs) 171 { 172 if (procs[op].p_name) 173 seq_printf(seq, "\t%12s: ", procs[op].p_name); 174 else if (op == 0) 175 seq_printf(seq, "\t NULL: "); 176 else 177 seq_printf(seq, "\t%12u: ", op); 178 } 179 180 void rpc_print_iostats(struct seq_file *seq, struct rpc_clnt *clnt) 181 { 182 struct rpc_iostats *stats = clnt->cl_metrics; 183 struct rpc_xprt *xprt; 184 unsigned int op, maxproc = clnt->cl_maxproc; 185 186 if (!stats) 187 return; 188 189 seq_printf(seq, "\tRPC iostats version: %s ", RPC_IOSTATS_VERS); 190 seq_printf(seq, "p/v: %u/%u (%s)\n", 191 clnt->cl_prog, clnt->cl_vers, clnt->cl_protname); 192 193 rcu_read_lock(); 194 xprt = rcu_dereference(clnt->cl_xprt); 195 if (xprt) 196 xprt->ops->print_stats(xprt, seq); 197 rcu_read_unlock(); 198 199 seq_printf(seq, "\tper-op statistics\n"); 200 for (op = 0; op < maxproc; op++) { 201 struct rpc_iostats *metrics = &stats[op]; 202 _print_name(seq, op, clnt->cl_procinfo); 203 seq_printf(seq, "%lu %lu %lu %Lu %Lu %Lu %Lu %Lu\n", 204 metrics->om_ops, 205 metrics->om_ntrans, 206 metrics->om_timeouts, 207 metrics->om_bytes_sent, 208 metrics->om_bytes_recv, 209 ktime_to_ms(metrics->om_queue), 210 ktime_to_ms(metrics->om_rtt), 211 ktime_to_ms(metrics->om_execute)); 212 } 213 } 214 EXPORT_SYMBOL_GPL(rpc_print_iostats); 215 216 /* 217 * Register/unregister RPC proc files 218 */ 219 static inline struct proc_dir_entry * 220 do_register(struct net *net, const char *name, void *data, 221 const struct file_operations *fops) 222 { 223 struct sunrpc_net *sn; 224 225 dprintk("RPC: registering /proc/net/rpc/%s\n", name); 226 sn = net_generic(net, sunrpc_net_id); 227 return proc_create_data(name, 0, sn->proc_net_rpc, fops, data); 228 } 229 230 struct proc_dir_entry * 231 rpc_proc_register(struct net *net, struct rpc_stat *statp) 232 { 233 return do_register(net, statp->program->name, statp, &rpc_proc_fops); 234 } 235 EXPORT_SYMBOL_GPL(rpc_proc_register); 236 237 void 238 rpc_proc_unregister(struct net *net, const char *name) 239 { 240 struct sunrpc_net *sn; 241 242 sn = net_generic(net, sunrpc_net_id); 243 remove_proc_entry(name, sn->proc_net_rpc); 244 } 245 EXPORT_SYMBOL_GPL(rpc_proc_unregister); 246 247 struct proc_dir_entry * 248 svc_proc_register(struct net *net, struct svc_stat *statp, const struct file_operations *fops) 249 { 250 return do_register(net, statp->program->pg_name, statp, fops); 251 } 252 EXPORT_SYMBOL_GPL(svc_proc_register); 253 254 void 255 svc_proc_unregister(struct net *net, const char *name) 256 { 257 struct sunrpc_net *sn; 258 259 sn = net_generic(net, sunrpc_net_id); 260 remove_proc_entry(name, sn->proc_net_rpc); 261 } 262 EXPORT_SYMBOL_GPL(svc_proc_unregister); 263 264 int rpc_proc_init(struct net *net) 265 { 266 struct sunrpc_net *sn; 267 268 dprintk("RPC: registering /proc/net/rpc\n"); 269 sn = net_generic(net, sunrpc_net_id); 270 sn->proc_net_rpc = proc_mkdir("rpc", net->proc_net); 271 if (sn->proc_net_rpc == NULL) 272 return -ENOMEM; 273 274 return 0; 275 } 276 277 void rpc_proc_exit(struct net *net) 278 { 279 dprintk("RPC: unregistering /proc/net/rpc\n"); 280 remove_proc_entry("rpc", net->proc_net); 281 } 282 283