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
  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