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 26 #include "netns.h" 27 28 #define RPCDBG_FACILITY RPCDBG_MISC 29 30 /* 31 * Get RPC client stats 32 */ 33 static int rpc_proc_show(struct seq_file *seq, void *v) { 34 const struct rpc_stat *statp = seq->private; 35 const struct rpc_program *prog = statp->program; 36 unsigned int i, j; 37 38 seq_printf(seq, 39 "net %u %u %u %u\n", 40 statp->netcnt, 41 statp->netudpcnt, 42 statp->nettcpcnt, 43 statp->nettcpconn); 44 seq_printf(seq, 45 "rpc %u %u %u\n", 46 statp->rpccnt, 47 statp->rpcretrans, 48 statp->rpcauthrefresh); 49 50 for (i = 0; i < prog->nrvers; i++) { 51 const struct rpc_version *vers = prog->version[i]; 52 if (!vers) 53 continue; 54 seq_printf(seq, "proc%u %u", 55 vers->number, vers->nrprocs); 56 for (j = 0; j < vers->nrprocs; j++) 57 seq_printf(seq, " %u", 58 vers->procs[j].p_count); 59 seq_putc(seq, '\n'); 60 } 61 return 0; 62 } 63 64 static int rpc_proc_open(struct inode *inode, struct file *file) 65 { 66 return single_open(file, rpc_proc_show, PDE(inode)->data); 67 } 68 69 static const struct file_operations rpc_proc_fops = { 70 .owner = THIS_MODULE, 71 .open = rpc_proc_open, 72 .read = seq_read, 73 .llseek = seq_lseek, 74 .release = single_release, 75 }; 76 77 /* 78 * Get RPC server stats 79 */ 80 void svc_seq_show(struct seq_file *seq, const struct svc_stat *statp) { 81 const struct svc_program *prog = statp->program; 82 const struct svc_procedure *proc; 83 const struct svc_version *vers; 84 unsigned int i, j; 85 86 seq_printf(seq, 87 "net %u %u %u %u\n", 88 statp->netcnt, 89 statp->netudpcnt, 90 statp->nettcpcnt, 91 statp->nettcpconn); 92 seq_printf(seq, 93 "rpc %u %u %u %u %u\n", 94 statp->rpccnt, 95 statp->rpcbadfmt+statp->rpcbadauth+statp->rpcbadclnt, 96 statp->rpcbadfmt, 97 statp->rpcbadauth, 98 statp->rpcbadclnt); 99 100 for (i = 0; i < prog->pg_nvers; i++) { 101 if (!(vers = prog->pg_vers[i]) || !(proc = vers->vs_proc)) 102 continue; 103 seq_printf(seq, "proc%d %u", i, vers->vs_nproc); 104 for (j = 0; j < vers->vs_nproc; j++, proc++) 105 seq_printf(seq, " %u", proc->pc_count); 106 seq_putc(seq, '\n'); 107 } 108 } 109 EXPORT_SYMBOL_GPL(svc_seq_show); 110 111 /** 112 * rpc_alloc_iostats - allocate an rpc_iostats structure 113 * @clnt: RPC program, version, and xprt 114 * 115 */ 116 struct rpc_iostats *rpc_alloc_iostats(struct rpc_clnt *clnt) 117 { 118 return kcalloc(clnt->cl_maxproc, sizeof(struct rpc_iostats), GFP_KERNEL); 119 } 120 EXPORT_SYMBOL_GPL(rpc_alloc_iostats); 121 122 /** 123 * rpc_free_iostats - release an rpc_iostats structure 124 * @stats: doomed rpc_iostats structure 125 * 126 */ 127 void rpc_free_iostats(struct rpc_iostats *stats) 128 { 129 kfree(stats); 130 } 131 EXPORT_SYMBOL_GPL(rpc_free_iostats); 132 133 /** 134 * rpc_count_iostats - tally up per-task stats 135 * @task: completed rpc_task 136 * 137 * Relies on the caller for serialization. 138 */ 139 void rpc_count_iostats(struct rpc_task *task) 140 { 141 struct rpc_rqst *req = task->tk_rqstp; 142 struct rpc_iostats *stats; 143 struct rpc_iostats *op_metrics; 144 ktime_t delta; 145 146 if (!task->tk_client || !task->tk_client->cl_metrics || !req) 147 return; 148 149 stats = task->tk_client->cl_metrics; 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 } 167 168 static void _print_name(struct seq_file *seq, unsigned int op, 169 struct rpc_procinfo *procs) 170 { 171 if (procs[op].p_name) 172 seq_printf(seq, "\t%12s: ", procs[op].p_name); 173 else if (op == 0) 174 seq_printf(seq, "\t NULL: "); 175 else 176 seq_printf(seq, "\t%12u: ", op); 177 } 178 179 void rpc_print_iostats(struct seq_file *seq, struct rpc_clnt *clnt) 180 { 181 struct rpc_iostats *stats = clnt->cl_metrics; 182 struct rpc_xprt *xprt = clnt->cl_xprt; 183 unsigned int op, maxproc = clnt->cl_maxproc; 184 185 if (!stats) 186 return; 187 188 seq_printf(seq, "\tRPC iostats version: %s ", RPC_IOSTATS_VERS); 189 seq_printf(seq, "p/v: %u/%u (%s)\n", 190 clnt->cl_prog, clnt->cl_vers, clnt->cl_protname); 191 192 if (xprt) 193 xprt->ops->print_stats(xprt, seq); 194 195 seq_printf(seq, "\tper-op statistics\n"); 196 for (op = 0; op < maxproc; op++) { 197 struct rpc_iostats *metrics = &stats[op]; 198 _print_name(seq, op, clnt->cl_procinfo); 199 seq_printf(seq, "%lu %lu %lu %Lu %Lu %Lu %Lu %Lu\n", 200 metrics->om_ops, 201 metrics->om_ntrans, 202 metrics->om_timeouts, 203 metrics->om_bytes_sent, 204 metrics->om_bytes_recv, 205 ktime_to_ms(metrics->om_queue), 206 ktime_to_ms(metrics->om_rtt), 207 ktime_to_ms(metrics->om_execute)); 208 } 209 } 210 EXPORT_SYMBOL_GPL(rpc_print_iostats); 211 212 /* 213 * Register/unregister RPC proc files 214 */ 215 static inline struct proc_dir_entry * 216 do_register(const char *name, void *data, const struct file_operations *fops) 217 { 218 struct sunrpc_net *sn; 219 220 dprintk("RPC: registering /proc/net/rpc/%s\n", name); 221 sn = net_generic(&init_net, sunrpc_net_id); 222 return proc_create_data(name, 0, sn->proc_net_rpc, fops, data); 223 } 224 225 struct proc_dir_entry * 226 rpc_proc_register(struct rpc_stat *statp) 227 { 228 return do_register(statp->program->name, statp, &rpc_proc_fops); 229 } 230 EXPORT_SYMBOL_GPL(rpc_proc_register); 231 232 void 233 rpc_proc_unregister(const char *name) 234 { 235 struct sunrpc_net *sn; 236 237 sn = net_generic(&init_net, sunrpc_net_id); 238 remove_proc_entry(name, sn->proc_net_rpc); 239 } 240 EXPORT_SYMBOL_GPL(rpc_proc_unregister); 241 242 struct proc_dir_entry * 243 svc_proc_register(struct svc_stat *statp, const struct file_operations *fops) 244 { 245 return do_register(statp->program->pg_name, statp, fops); 246 } 247 EXPORT_SYMBOL_GPL(svc_proc_register); 248 249 void 250 svc_proc_unregister(const char *name) 251 { 252 struct sunrpc_net *sn; 253 254 sn = net_generic(&init_net, sunrpc_net_id); 255 remove_proc_entry(name, sn->proc_net_rpc); 256 } 257 EXPORT_SYMBOL_GPL(svc_proc_unregister); 258 259 int rpc_proc_init(struct net *net) 260 { 261 struct sunrpc_net *sn; 262 263 dprintk("RPC: registering /proc/net/rpc\n"); 264 sn = net_generic(net, sunrpc_net_id); 265 sn->proc_net_rpc = proc_mkdir("rpc", net->proc_net); 266 if (sn->proc_net_rpc == NULL) 267 return -ENOMEM; 268 269 return 0; 270 } 271 272 void rpc_proc_exit(struct net *net) 273 { 274 dprintk("RPC: unregistering /proc/net/rpc\n"); 275 remove_proc_entry("rpc", net->proc_net); 276 } 277 278