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/sched.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 #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 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 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 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 } 109 110 /** 111 * rpc_alloc_iostats - allocate an rpc_iostats structure 112 * @clnt: RPC program, version, and xprt 113 * 114 */ 115 struct rpc_iostats *rpc_alloc_iostats(struct rpc_clnt *clnt) 116 { 117 unsigned int ops = clnt->cl_maxproc; 118 size_t size = ops * sizeof(struct rpc_iostats); 119 struct rpc_iostats *new; 120 121 new = kmalloc(size, GFP_KERNEL); 122 if (new) 123 memset(new, 0 , size); 124 return new; 125 } 126 EXPORT_SYMBOL(rpc_alloc_iostats); 127 128 /** 129 * rpc_free_iostats - release an rpc_iostats structure 130 * @stats: doomed rpc_iostats structure 131 * 132 */ 133 void rpc_free_iostats(struct rpc_iostats *stats) 134 { 135 kfree(stats); 136 } 137 EXPORT_SYMBOL(rpc_free_iostats); 138 139 /** 140 * rpc_count_iostats - tally up per-task stats 141 * @task: completed rpc_task 142 * 143 * Relies on the caller for serialization. 144 */ 145 void rpc_count_iostats(struct rpc_task *task) 146 { 147 struct rpc_rqst *req = task->tk_rqstp; 148 struct rpc_iostats *stats = task->tk_client->cl_metrics; 149 struct rpc_iostats *op_metrics; 150 long rtt, execute, queue; 151 152 if (!stats || !req) 153 return; 154 op_metrics = &stats[task->tk_msg.rpc_proc->p_statidx]; 155 156 op_metrics->om_ops++; 157 op_metrics->om_ntrans += req->rq_ntrans; 158 op_metrics->om_timeouts += task->tk_timeouts; 159 160 op_metrics->om_bytes_sent += task->tk_bytes_sent; 161 op_metrics->om_bytes_recv += req->rq_received; 162 163 queue = (long)req->rq_xtime - task->tk_start; 164 if (queue < 0) 165 queue = -queue; 166 op_metrics->om_queue += queue; 167 168 rtt = task->tk_rtt; 169 if (rtt < 0) 170 rtt = -rtt; 171 op_metrics->om_rtt += rtt; 172 173 execute = (long)jiffies - task->tk_start; 174 if (execute < 0) 175 execute = -execute; 176 op_metrics->om_execute += execute; 177 } 178 179 static void _print_name(struct seq_file *seq, unsigned int op, 180 struct rpc_procinfo *procs) 181 { 182 if (procs[op].p_name) 183 seq_printf(seq, "\t%12s: ", procs[op].p_name); 184 else if (op == 0) 185 seq_printf(seq, "\t NULL: "); 186 else 187 seq_printf(seq, "\t%12u: ", op); 188 } 189 190 #define MILLISECS_PER_JIFFY (1000 / HZ) 191 192 void rpc_print_iostats(struct seq_file *seq, struct rpc_clnt *clnt) 193 { 194 struct rpc_iostats *stats = clnt->cl_metrics; 195 struct rpc_xprt *xprt = clnt->cl_xprt; 196 unsigned int op, maxproc = clnt->cl_maxproc; 197 198 if (!stats) 199 return; 200 201 seq_printf(seq, "\tRPC iostats version: %s ", RPC_IOSTATS_VERS); 202 seq_printf(seq, "p/v: %u/%u (%s)\n", 203 clnt->cl_prog, clnt->cl_vers, clnt->cl_protname); 204 205 if (xprt) 206 xprt->ops->print_stats(xprt, seq); 207 208 seq_printf(seq, "\tper-op statistics\n"); 209 for (op = 0; op < maxproc; op++) { 210 struct rpc_iostats *metrics = &stats[op]; 211 _print_name(seq, op, clnt->cl_procinfo); 212 seq_printf(seq, "%lu %lu %lu %Lu %Lu %Lu %Lu %Lu\n", 213 metrics->om_ops, 214 metrics->om_ntrans, 215 metrics->om_timeouts, 216 metrics->om_bytes_sent, 217 metrics->om_bytes_recv, 218 metrics->om_queue * MILLISECS_PER_JIFFY, 219 metrics->om_rtt * MILLISECS_PER_JIFFY, 220 metrics->om_execute * MILLISECS_PER_JIFFY); 221 } 222 } 223 EXPORT_SYMBOL(rpc_print_iostats); 224 225 /* 226 * Register/unregister RPC proc files 227 */ 228 static inline struct proc_dir_entry * 229 do_register(const char *name, void *data, const struct file_operations *fops) 230 { 231 struct proc_dir_entry *ent; 232 233 rpc_proc_init(); 234 dprintk("RPC: registering /proc/net/rpc/%s\n", name); 235 236 ent = create_proc_entry(name, 0, proc_net_rpc); 237 if (ent) { 238 ent->proc_fops = fops; 239 ent->data = data; 240 } 241 return ent; 242 } 243 244 struct proc_dir_entry * 245 rpc_proc_register(struct rpc_stat *statp) 246 { 247 return do_register(statp->program->name, statp, &rpc_proc_fops); 248 } 249 250 void 251 rpc_proc_unregister(const char *name) 252 { 253 remove_proc_entry(name, proc_net_rpc); 254 } 255 256 struct proc_dir_entry * 257 svc_proc_register(struct svc_stat *statp, const struct file_operations *fops) 258 { 259 return do_register(statp->program->pg_name, statp, fops); 260 } 261 262 void 263 svc_proc_unregister(const char *name) 264 { 265 remove_proc_entry(name, proc_net_rpc); 266 } 267 268 void 269 rpc_proc_init(void) 270 { 271 dprintk("RPC: registering /proc/net/rpc\n"); 272 if (!proc_net_rpc) { 273 struct proc_dir_entry *ent; 274 ent = proc_mkdir("rpc", proc_net); 275 if (ent) { 276 ent->owner = THIS_MODULE; 277 proc_net_rpc = ent; 278 } 279 } 280 } 281 282 void 283 rpc_proc_exit(void) 284 { 285 dprintk("RPC: unregistering /proc/net/rpc\n"); 286 if (proc_net_rpc) { 287 proc_net_rpc = NULL; 288 remove_proc_entry("net/rpc", NULL); 289 } 290 } 291 292