net/sunrpc/stats.c

   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