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 <net/net_namespace.h> 26 27 #define RPCDBG_FACILITY RPCDBG_MISC 28 29 struct proc_dir_entry *proc_net_rpc = NULL; 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(inode)->data); 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 struct rpc_iostats *new; 120 new = kcalloc(clnt->cl_maxproc, sizeof(struct rpc_iostats), GFP_KERNEL); 121 return new; 122 } 123 EXPORT_SYMBOL_GPL(rpc_alloc_iostats); 124 125 /** 126 * rpc_free_iostats - release an rpc_iostats structure 127 * @stats: doomed rpc_iostats structure 128 * 129 */ 130 void rpc_free_iostats(struct rpc_iostats *stats) 131 { 132 kfree(stats); 133 } 134 EXPORT_SYMBOL_GPL(rpc_free_iostats); 135 136 /** 137 * rpc_count_iostats - tally up per-task stats 138 * @task: completed rpc_task 139 * 140 * Relies on the caller for serialization. 141 */ 142 void rpc_count_iostats(struct rpc_task *task) 143 { 144 struct rpc_rqst *req = task->tk_rqstp; 145 struct rpc_iostats *stats; 146 struct rpc_iostats *op_metrics; 147 long rtt, execute, queue; 148 149 if (!task->tk_client || !task->tk_client->cl_metrics || !req) 150 return; 151 152 stats = task->tk_client->cl_metrics; 153 op_metrics = &stats[task->tk_msg.rpc_proc->p_statidx]; 154 155 op_metrics->om_ops++; 156 op_metrics->om_ntrans += req->rq_ntrans; 157 op_metrics->om_timeouts += task->tk_timeouts; 158 159 op_metrics->om_bytes_sent += task->tk_bytes_sent; 160 op_metrics->om_bytes_recv += req->rq_reply_bytes_recvd; 161 162 queue = (long)req->rq_xtime - task->tk_start; 163 if (queue < 0) 164 queue = -queue; 165 op_metrics->om_queue += queue; 166 167 rtt = task->tk_rtt; 168 if (rtt < 0) 169 rtt = -rtt; 170 op_metrics->om_rtt += rtt; 171 172 execute = (long)jiffies - task->tk_start; 173 if (execute < 0) 174 execute = -execute; 175 op_metrics->om_execute += execute; 176 } 177 178 static void _print_name(struct seq_file *seq, unsigned int op, 179 struct rpc_procinfo *procs) 180 { 181 if (procs[op].p_name) 182 seq_printf(seq, "\t%12s: ", procs[op].p_name); 183 else if (op == 0) 184 seq_printf(seq, "\t NULL: "); 185 else 186 seq_printf(seq, "\t%12u: ", op); 187 } 188 189 #define MILLISECS_PER_JIFFY (1000 / HZ) 190 191 void rpc_print_iostats(struct seq_file *seq, struct rpc_clnt *clnt) 192 { 193 struct rpc_iostats *stats = clnt->cl_metrics; 194 struct rpc_xprt *xprt = clnt->cl_xprt; 195 unsigned int op, maxproc = clnt->cl_maxproc; 196 197 if (!stats) 198 return; 199 200 seq_printf(seq, "\tRPC iostats version: %s ", RPC_IOSTATS_VERS); 201 seq_printf(seq, "p/v: %u/%u (%s)\n", 202 clnt->cl_prog, clnt->cl_vers, clnt->cl_protname); 203 204 if (xprt) 205 xprt->ops->print_stats(xprt, seq); 206 207 seq_printf(seq, "\tper-op statistics\n"); 208 for (op = 0; op < maxproc; op++) { 209 struct rpc_iostats *metrics = &stats[op]; 210 _print_name(seq, op, clnt->cl_procinfo); 211 seq_printf(seq, "%lu %lu %lu %Lu %Lu %Lu %Lu %Lu\n", 212 metrics->om_ops, 213 metrics->om_ntrans, 214 metrics->om_timeouts, 215 metrics->om_bytes_sent, 216 metrics->om_bytes_recv, 217 metrics->om_queue * MILLISECS_PER_JIFFY, 218 metrics->om_rtt * MILLISECS_PER_JIFFY, 219 metrics->om_execute * MILLISECS_PER_JIFFY); 220 } 221 } 222 EXPORT_SYMBOL_GPL(rpc_print_iostats); 223 224 /* 225 * Register/unregister RPC proc files 226 */ 227 static inline struct proc_dir_entry * 228 do_register(const char *name, void *data, const struct file_operations *fops) 229 { 230 rpc_proc_init(); 231 dprintk("RPC: registering /proc/net/rpc/%s\n", name); 232 233 return proc_create_data(name, 0, proc_net_rpc, fops, data); 234 } 235 236 struct proc_dir_entry * 237 rpc_proc_register(struct rpc_stat *statp) 238 { 239 return do_register(statp->program->name, statp, &rpc_proc_fops); 240 } 241 EXPORT_SYMBOL_GPL(rpc_proc_register); 242 243 void 244 rpc_proc_unregister(const char *name) 245 { 246 remove_proc_entry(name, proc_net_rpc); 247 } 248 EXPORT_SYMBOL_GPL(rpc_proc_unregister); 249 250 struct proc_dir_entry * 251 svc_proc_register(struct svc_stat *statp, const struct file_operations *fops) 252 { 253 return do_register(statp->program->pg_name, statp, fops); 254 } 255 EXPORT_SYMBOL_GPL(svc_proc_register); 256 257 void 258 svc_proc_unregister(const char *name) 259 { 260 remove_proc_entry(name, proc_net_rpc); 261 } 262 EXPORT_SYMBOL_GPL(svc_proc_unregister); 263 264 void 265 rpc_proc_init(void) 266 { 267 dprintk("RPC: registering /proc/net/rpc\n"); 268 if (!proc_net_rpc) 269 proc_net_rpc = proc_mkdir("rpc", init_net.proc_net); 270 } 271 272 void 273 rpc_proc_exit(void) 274 { 275 dprintk("RPC: unregistering /proc/net/rpc\n"); 276 if (proc_net_rpc) { 277 proc_net_rpc = NULL; 278 remove_proc_entry("rpc", init_net.proc_net); 279 } 280 } 281 282