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