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 = task->tk_client->cl_metrics; 145 struct rpc_iostats *op_metrics; 146 long rtt, execute, queue; 147 148 if (!stats || !req) 149 return; 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 += task->tk_bytes_sent; 157 op_metrics->om_bytes_recv += req->rq_received; 158 159 queue = (long)req->rq_xtime - task->tk_start; 160 if (queue < 0) 161 queue = -queue; 162 op_metrics->om_queue += queue; 163 164 rtt = task->tk_rtt; 165 if (rtt < 0) 166 rtt = -rtt; 167 op_metrics->om_rtt += rtt; 168 169 execute = (long)jiffies - task->tk_start; 170 if (execute < 0) 171 execute = -execute; 172 op_metrics->om_execute += execute; 173 } 174 175 static void _print_name(struct seq_file *seq, unsigned int op, 176 struct rpc_procinfo *procs) 177 { 178 if (procs[op].p_name) 179 seq_printf(seq, "\t%12s: ", procs[op].p_name); 180 else if (op == 0) 181 seq_printf(seq, "\t NULL: "); 182 else 183 seq_printf(seq, "\t%12u: ", op); 184 } 185 186 #define MILLISECS_PER_JIFFY (1000 / HZ) 187 188 void rpc_print_iostats(struct seq_file *seq, struct rpc_clnt *clnt) 189 { 190 struct rpc_iostats *stats = clnt->cl_metrics; 191 struct rpc_xprt *xprt = clnt->cl_xprt; 192 unsigned int op, maxproc = clnt->cl_maxproc; 193 194 if (!stats) 195 return; 196 197 seq_printf(seq, "\tRPC iostats version: %s ", RPC_IOSTATS_VERS); 198 seq_printf(seq, "p/v: %u/%u (%s)\n", 199 clnt->cl_prog, clnt->cl_vers, clnt->cl_protname); 200 201 if (xprt) 202 xprt->ops->print_stats(xprt, seq); 203 204 seq_printf(seq, "\tper-op statistics\n"); 205 for (op = 0; op < maxproc; op++) { 206 struct rpc_iostats *metrics = &stats[op]; 207 _print_name(seq, op, clnt->cl_procinfo); 208 seq_printf(seq, "%lu %lu %lu %Lu %Lu %Lu %Lu %Lu\n", 209 metrics->om_ops, 210 metrics->om_ntrans, 211 metrics->om_timeouts, 212 metrics->om_bytes_sent, 213 metrics->om_bytes_recv, 214 metrics->om_queue * MILLISECS_PER_JIFFY, 215 metrics->om_rtt * MILLISECS_PER_JIFFY, 216 metrics->om_execute * MILLISECS_PER_JIFFY); 217 } 218 } 219 EXPORT_SYMBOL_GPL(rpc_print_iostats); 220 221 /* 222 * Register/unregister RPC proc files 223 */ 224 static inline struct proc_dir_entry * 225 do_register(const char *name, void *data, const struct file_operations *fops) 226 { 227 rpc_proc_init(); 228 dprintk("RPC: registering /proc/net/rpc/%s\n", name); 229 230 return proc_create_data(name, 0, proc_net_rpc, fops, data); 231 } 232 233 struct proc_dir_entry * 234 rpc_proc_register(struct rpc_stat *statp) 235 { 236 return do_register(statp->program->name, statp, &rpc_proc_fops); 237 } 238 EXPORT_SYMBOL_GPL(rpc_proc_register); 239 240 void 241 rpc_proc_unregister(const char *name) 242 { 243 remove_proc_entry(name, proc_net_rpc); 244 } 245 EXPORT_SYMBOL_GPL(rpc_proc_unregister); 246 247 struct proc_dir_entry * 248 svc_proc_register(struct svc_stat *statp, const struct file_operations *fops) 249 { 250 return do_register(statp->program->pg_name, statp, fops); 251 } 252 EXPORT_SYMBOL_GPL(svc_proc_register); 253 254 void 255 svc_proc_unregister(const char *name) 256 { 257 remove_proc_entry(name, proc_net_rpc); 258 } 259 EXPORT_SYMBOL_GPL(svc_proc_unregister); 260 261 void 262 rpc_proc_init(void) 263 { 264 dprintk("RPC: registering /proc/net/rpc\n"); 265 if (!proc_net_rpc) 266 proc_net_rpc = proc_mkdir("rpc", init_net.proc_net); 267 } 268 269 void 270 rpc_proc_exit(void) 271 { 272 dprintk("RPC: unregistering /proc/net/rpc\n"); 273 if (proc_net_rpc) { 274 proc_net_rpc = NULL; 275 remove_proc_entry("rpc", init_net.proc_net); 276 } 277 } 278 279