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 25 #define RPCDBG_FACILITY RPCDBG_MISC 26 27 struct proc_dir_entry *proc_net_rpc = NULL; 28 29 /* 30 * Get RPC client stats 31 */ 32 static int rpc_proc_show(struct seq_file *seq, void *v) { 33 const struct rpc_stat *statp = seq->private; 34 const struct rpc_program *prog = statp->program; 35 int i, j; 36 37 seq_printf(seq, 38 "net %u %u %u %u\n", 39 statp->netcnt, 40 statp->netudpcnt, 41 statp->nettcpcnt, 42 statp->nettcpconn); 43 seq_printf(seq, 44 "rpc %u %u %u\n", 45 statp->rpccnt, 46 statp->rpcretrans, 47 statp->rpcauthrefresh); 48 49 for (i = 0; i < prog->nrvers; i++) { 50 const struct rpc_version *vers = prog->version[i]; 51 if (!vers) 52 continue; 53 seq_printf(seq, "proc%u %u", 54 vers->number, vers->nrprocs); 55 for (j = 0; j < vers->nrprocs; j++) 56 seq_printf(seq, " %u", 57 vers->procs[j].p_count); 58 seq_putc(seq, '\n'); 59 } 60 return 0; 61 } 62 63 static int rpc_proc_open(struct inode *inode, struct file *file) 64 { 65 return single_open(file, rpc_proc_show, PDE(inode)->data); 66 } 67 68 static const struct file_operations rpc_proc_fops = { 69 .owner = THIS_MODULE, 70 .open = rpc_proc_open, 71 .read = seq_read, 72 .llseek = seq_lseek, 73 .release = single_release, 74 }; 75 76 /* 77 * Get RPC server stats 78 */ 79 void svc_seq_show(struct seq_file *seq, const struct svc_stat *statp) { 80 const struct svc_program *prog = statp->program; 81 const struct svc_procedure *proc; 82 const struct svc_version *vers; 83 int i, j; 84 85 seq_printf(seq, 86 "net %u %u %u %u\n", 87 statp->netcnt, 88 statp->netudpcnt, 89 statp->nettcpcnt, 90 statp->nettcpconn); 91 seq_printf(seq, 92 "rpc %u %u %u %u %u\n", 93 statp->rpccnt, 94 statp->rpcbadfmt+statp->rpcbadauth+statp->rpcbadclnt, 95 statp->rpcbadfmt, 96 statp->rpcbadauth, 97 statp->rpcbadclnt); 98 99 for (i = 0; i < prog->pg_nvers; i++) { 100 if (!(vers = prog->pg_vers[i]) || !(proc = vers->vs_proc)) 101 continue; 102 seq_printf(seq, "proc%d %u", i, vers->vs_nproc); 103 for (j = 0; j < vers->vs_nproc; j++, proc++) 104 seq_printf(seq, " %u", proc->pc_count); 105 seq_putc(seq, '\n'); 106 } 107 } 108 109 /** 110 * rpc_alloc_iostats - allocate an rpc_iostats structure 111 * @clnt: RPC program, version, and xprt 112 * 113 */ 114 struct rpc_iostats *rpc_alloc_iostats(struct rpc_clnt *clnt) 115 { 116 struct rpc_iostats *new; 117 new = kcalloc(clnt->cl_maxproc, sizeof(struct rpc_iostats), GFP_KERNEL); 118 return new; 119 } 120 EXPORT_SYMBOL(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(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 = task->tk_client->cl_metrics; 143 struct rpc_iostats *op_metrics; 144 long rtt, execute, queue; 145 146 if (!stats || !req) 147 return; 148 op_metrics = &stats[task->tk_msg.rpc_proc->p_statidx]; 149 150 op_metrics->om_ops++; 151 op_metrics->om_ntrans += req->rq_ntrans; 152 op_metrics->om_timeouts += task->tk_timeouts; 153 154 op_metrics->om_bytes_sent += task->tk_bytes_sent; 155 op_metrics->om_bytes_recv += req->rq_received; 156 157 queue = (long)req->rq_xtime - task->tk_start; 158 if (queue < 0) 159 queue = -queue; 160 op_metrics->om_queue += queue; 161 162 rtt = task->tk_rtt; 163 if (rtt < 0) 164 rtt = -rtt; 165 op_metrics->om_rtt += rtt; 166 167 execute = (long)jiffies - task->tk_start; 168 if (execute < 0) 169 execute = -execute; 170 op_metrics->om_execute += execute; 171 } 172 173 static void _print_name(struct seq_file *seq, unsigned int op, 174 struct rpc_procinfo *procs) 175 { 176 if (procs[op].p_name) 177 seq_printf(seq, "\t%12s: ", procs[op].p_name); 178 else if (op == 0) 179 seq_printf(seq, "\t NULL: "); 180 else 181 seq_printf(seq, "\t%12u: ", op); 182 } 183 184 #define MILLISECS_PER_JIFFY (1000 / HZ) 185 186 void rpc_print_iostats(struct seq_file *seq, struct rpc_clnt *clnt) 187 { 188 struct rpc_iostats *stats = clnt->cl_metrics; 189 struct rpc_xprt *xprt = clnt->cl_xprt; 190 unsigned int op, maxproc = clnt->cl_maxproc; 191 192 if (!stats) 193 return; 194 195 seq_printf(seq, "\tRPC iostats version: %s ", RPC_IOSTATS_VERS); 196 seq_printf(seq, "p/v: %u/%u (%s)\n", 197 clnt->cl_prog, clnt->cl_vers, clnt->cl_protname); 198 199 if (xprt) 200 xprt->ops->print_stats(xprt, seq); 201 202 seq_printf(seq, "\tper-op statistics\n"); 203 for (op = 0; op < maxproc; op++) { 204 struct rpc_iostats *metrics = &stats[op]; 205 _print_name(seq, op, clnt->cl_procinfo); 206 seq_printf(seq, "%lu %lu %lu %Lu %Lu %Lu %Lu %Lu\n", 207 metrics->om_ops, 208 metrics->om_ntrans, 209 metrics->om_timeouts, 210 metrics->om_bytes_sent, 211 metrics->om_bytes_recv, 212 metrics->om_queue * MILLISECS_PER_JIFFY, 213 metrics->om_rtt * MILLISECS_PER_JIFFY, 214 metrics->om_execute * MILLISECS_PER_JIFFY); 215 } 216 } 217 EXPORT_SYMBOL(rpc_print_iostats); 218 219 /* 220 * Register/unregister RPC proc files 221 */ 222 static inline struct proc_dir_entry * 223 do_register(const char *name, void *data, const struct file_operations *fops) 224 { 225 struct proc_dir_entry *ent; 226 227 rpc_proc_init(); 228 dprintk("RPC: registering /proc/net/rpc/%s\n", name); 229 230 ent = create_proc_entry(name, 0, proc_net_rpc); 231 if (ent) { 232 ent->proc_fops = fops; 233 ent->data = data; 234 } 235 return ent; 236 } 237 238 struct proc_dir_entry * 239 rpc_proc_register(struct rpc_stat *statp) 240 { 241 return do_register(statp->program->name, statp, &rpc_proc_fops); 242 } 243 244 void 245 rpc_proc_unregister(const char *name) 246 { 247 remove_proc_entry(name, proc_net_rpc); 248 } 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 } 255 256 void 257 svc_proc_unregister(const char *name) 258 { 259 remove_proc_entry(name, proc_net_rpc); 260 } 261 262 void 263 rpc_proc_init(void) 264 { 265 dprintk("RPC: registering /proc/net/rpc\n"); 266 if (!proc_net_rpc) { 267 struct proc_dir_entry *ent; 268 ent = proc_mkdir("rpc", proc_net); 269 if (ent) { 270 ent->owner = THIS_MODULE; 271 proc_net_rpc = ent; 272 } 273 } 274 } 275 276 void 277 rpc_proc_exit(void) 278 { 279 dprintk("RPC: unregistering /proc/net/rpc\n"); 280 if (proc_net_rpc) { 281 proc_net_rpc = NULL; 282 remove_proc_entry("net/rpc", NULL); 283 } 284 } 285 286