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 17 #include <linux/init.h> 18 #include <linux/kernel.h> 19 #include <linux/proc_fs.h> 20 #include <linux/seq_file.h> 21 #include <linux/sunrpc/clnt.h> 22 #include <linux/sunrpc/svcsock.h> 23 #include <linux/sunrpc/metrics.h> 24 #include <net/net_namespace.h> 25 26 #define RPCDBG_FACILITY RPCDBG_MISC 27 28 struct proc_dir_entry *proc_net_rpc = NULL; 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 struct rpc_iostats *new; 119 new = kcalloc(clnt->cl_maxproc, sizeof(struct rpc_iostats), GFP_KERNEL); 120 return new; 121 } 122 EXPORT_SYMBOL_GPL(rpc_alloc_iostats); 123 124 /** 125 * rpc_free_iostats - release an rpc_iostats structure 126 * @stats: doomed rpc_iostats structure 127 * 128 */ 129 void rpc_free_iostats(struct rpc_iostats *stats) 130 { 131 kfree(stats); 132 } 133 EXPORT_SYMBOL_GPL(rpc_free_iostats); 134 135 /** 136 * rpc_count_iostats - tally up per-task stats 137 * @task: completed rpc_task 138 * 139 * Relies on the caller for serialization. 140 */ 141 void rpc_count_iostats(struct rpc_task *task) 142 { 143 struct rpc_rqst *req = task->tk_rqstp; 144 struct rpc_iostats *stats; 145 struct rpc_iostats *op_metrics; 146 long rtt, execute, queue; 147 148 if (!task->tk_client || !task->tk_client->cl_metrics || !req) 149 return; 150 151 stats = task->tk_client->cl_metrics; 152 op_metrics = &stats[task->tk_msg.rpc_proc->p_statidx]; 153 154 op_metrics->om_ops++; 155 op_metrics->om_ntrans += req->rq_ntrans; 156 op_metrics->om_timeouts += task->tk_timeouts; 157 158 op_metrics->om_bytes_sent += task->tk_bytes_sent; 159 op_metrics->om_bytes_recv += req->rq_reply_bytes_recvd; 160 161 queue = (long)req->rq_xtime - task->tk_start; 162 if (queue < 0) 163 queue = -queue; 164 op_metrics->om_queue += queue; 165 166 rtt = task->tk_rtt; 167 if (rtt < 0) 168 rtt = -rtt; 169 op_metrics->om_rtt += rtt; 170 171 execute = (long)jiffies - task->tk_start; 172 if (execute < 0) 173 execute = -execute; 174 op_metrics->om_execute += execute; 175 } 176 177 static void _print_name(struct seq_file *seq, unsigned int op, 178 struct rpc_procinfo *procs) 179 { 180 if (procs[op].p_name) 181 seq_printf(seq, "\t%12s: ", procs[op].p_name); 182 else if (op == 0) 183 seq_printf(seq, "\t NULL: "); 184 else 185 seq_printf(seq, "\t%12u: ", op); 186 } 187 188 #define MILLISECS_PER_JIFFY (1000 / HZ) 189 190 void rpc_print_iostats(struct seq_file *seq, struct rpc_clnt *clnt) 191 { 192 struct rpc_iostats *stats = clnt->cl_metrics; 193 struct rpc_xprt *xprt = clnt->cl_xprt; 194 unsigned int op, maxproc = clnt->cl_maxproc; 195 196 if (!stats) 197 return; 198 199 seq_printf(seq, "\tRPC iostats version: %s ", RPC_IOSTATS_VERS); 200 seq_printf(seq, "p/v: %u/%u (%s)\n", 201 clnt->cl_prog, clnt->cl_vers, clnt->cl_protname); 202 203 if (xprt) 204 xprt->ops->print_stats(xprt, seq); 205 206 seq_printf(seq, "\tper-op statistics\n"); 207 for (op = 0; op < maxproc; op++) { 208 struct rpc_iostats *metrics = &stats[op]; 209 _print_name(seq, op, clnt->cl_procinfo); 210 seq_printf(seq, "%lu %lu %lu %Lu %Lu %Lu %Lu %Lu\n", 211 metrics->om_ops, 212 metrics->om_ntrans, 213 metrics->om_timeouts, 214 metrics->om_bytes_sent, 215 metrics->om_bytes_recv, 216 metrics->om_queue * MILLISECS_PER_JIFFY, 217 metrics->om_rtt * MILLISECS_PER_JIFFY, 218 metrics->om_execute * MILLISECS_PER_JIFFY); 219 } 220 } 221 EXPORT_SYMBOL_GPL(rpc_print_iostats); 222 223 /* 224 * Register/unregister RPC proc files 225 */ 226 static inline struct proc_dir_entry * 227 do_register(const char *name, void *data, const struct file_operations *fops) 228 { 229 rpc_proc_init(); 230 dprintk("RPC: registering /proc/net/rpc/%s\n", name); 231 232 return proc_create_data(name, 0, proc_net_rpc, fops, data); 233 } 234 235 struct proc_dir_entry * 236 rpc_proc_register(struct rpc_stat *statp) 237 { 238 return do_register(statp->program->name, statp, &rpc_proc_fops); 239 } 240 EXPORT_SYMBOL_GPL(rpc_proc_register); 241 242 void 243 rpc_proc_unregister(const char *name) 244 { 245 remove_proc_entry(name, proc_net_rpc); 246 } 247 EXPORT_SYMBOL_GPL(rpc_proc_unregister); 248 249 struct proc_dir_entry * 250 svc_proc_register(struct svc_stat *statp, const struct file_operations *fops) 251 { 252 return do_register(statp->program->pg_name, statp, fops); 253 } 254 EXPORT_SYMBOL_GPL(svc_proc_register); 255 256 void 257 svc_proc_unregister(const char *name) 258 { 259 remove_proc_entry(name, proc_net_rpc); 260 } 261 EXPORT_SYMBOL_GPL(svc_proc_unregister); 262 263 void 264 rpc_proc_init(void) 265 { 266 dprintk("RPC: registering /proc/net/rpc\n"); 267 if (!proc_net_rpc) 268 proc_net_rpc = proc_mkdir("rpc", init_net.proc_net); 269 } 270 271 void 272 rpc_proc_exit(void) 273 { 274 dprintk("RPC: unregistering /proc/net/rpc\n"); 275 if (proc_net_rpc) { 276 proc_net_rpc = NULL; 277 remove_proc_entry("rpc", init_net.proc_net); 278 } 279 } 280 281