linux/net/sunrpc/stats.c
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   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
  29struct proc_dir_entry   *proc_net_rpc = NULL;
  30
  31/*
  32 * Get RPC client stats
  33 */
  34static 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
  65static int rpc_proc_open(struct inode *inode, struct file *file)
  66{
  67        return single_open(file, rpc_proc_show, PDE(inode)->data);
  68}
  69
  70static 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 */
  81void 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}
 110EXPORT_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 */
 117struct 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}
 123EXPORT_SYMBOL_GPL(rpc_alloc_iostats);
 124
 125/**
 126 * rpc_free_iostats - release an rpc_iostats structure
 127 * @stats: doomed rpc_iostats structure
 128 *
 129 */
 130void rpc_free_iostats(struct rpc_iostats *stats)
 131{
 132        kfree(stats);
 133}
 134EXPORT_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 */
 142void 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        ktime_t delta;
 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 += req->rq_xmit_bytes_sent;
 160        op_metrics->om_bytes_recv += req->rq_reply_bytes_recvd;
 161
 162        delta = ktime_sub(req->rq_xtime, task->tk_start);
 163        op_metrics->om_queue = ktime_add(op_metrics->om_queue, delta);
 164
 165        op_metrics->om_rtt = ktime_add(op_metrics->om_rtt, req->rq_rtt);
 166
 167        delta = ktime_sub(ktime_get(), task->tk_start);
 168        op_metrics->om_execute = ktime_add(op_metrics->om_execute, delta);
 169}
 170
 171static void _print_name(struct seq_file *seq, unsigned int op,
 172                        struct rpc_procinfo *procs)
 173{
 174        if (procs[op].p_name)
 175                seq_printf(seq, "\t%12s: ", procs[op].p_name);
 176        else if (op == 0)
 177                seq_printf(seq, "\t        NULL: ");
 178        else
 179                seq_printf(seq, "\t%12u: ", op);
 180}
 181
 182void rpc_print_iostats(struct seq_file *seq, struct rpc_clnt *clnt)
 183{
 184        struct rpc_iostats *stats = clnt->cl_metrics;
 185        struct rpc_xprt *xprt = clnt->cl_xprt;
 186        unsigned int op, maxproc = clnt->cl_maxproc;
 187
 188        if (!stats)
 189                return;
 190
 191        seq_printf(seq, "\tRPC iostats version: %s  ", RPC_IOSTATS_VERS);
 192        seq_printf(seq, "p/v: %u/%u (%s)\n",
 193                        clnt->cl_prog, clnt->cl_vers, clnt->cl_protname);
 194
 195        if (xprt)
 196                xprt->ops->print_stats(xprt, seq);
 197
 198        seq_printf(seq, "\tper-op statistics\n");
 199        for (op = 0; op < maxproc; op++) {
 200                struct rpc_iostats *metrics = &stats[op];
 201                _print_name(seq, op, clnt->cl_procinfo);
 202                seq_printf(seq, "%lu %lu %lu %Lu %Lu %Lu %Lu %Lu\n",
 203                                metrics->om_ops,
 204                                metrics->om_ntrans,
 205                                metrics->om_timeouts,
 206                                metrics->om_bytes_sent,
 207                                metrics->om_bytes_recv,
 208                                ktime_to_ms(metrics->om_queue),
 209                                ktime_to_ms(metrics->om_rtt),
 210                                ktime_to_ms(metrics->om_execute));
 211        }
 212}
 213EXPORT_SYMBOL_GPL(rpc_print_iostats);
 214
 215/*
 216 * Register/unregister RPC proc files
 217 */
 218static inline struct proc_dir_entry *
 219do_register(const char *name, void *data, const struct file_operations *fops)
 220{
 221        rpc_proc_init();
 222        dprintk("RPC:       registering /proc/net/rpc/%s\n", name);
 223
 224        return proc_create_data(name, 0, proc_net_rpc, fops, data);
 225}
 226
 227struct proc_dir_entry *
 228rpc_proc_register(struct rpc_stat *statp)
 229{
 230        return do_register(statp->program->name, statp, &rpc_proc_fops);
 231}
 232EXPORT_SYMBOL_GPL(rpc_proc_register);
 233
 234void
 235rpc_proc_unregister(const char *name)
 236{
 237        remove_proc_entry(name, proc_net_rpc);
 238}
 239EXPORT_SYMBOL_GPL(rpc_proc_unregister);
 240
 241struct proc_dir_entry *
 242svc_proc_register(struct svc_stat *statp, const struct file_operations *fops)
 243{
 244        return do_register(statp->program->pg_name, statp, fops);
 245}
 246EXPORT_SYMBOL_GPL(svc_proc_register);
 247
 248void
 249svc_proc_unregister(const char *name)
 250{
 251        remove_proc_entry(name, proc_net_rpc);
 252}
 253EXPORT_SYMBOL_GPL(svc_proc_unregister);
 254
 255void
 256rpc_proc_init(void)
 257{
 258        dprintk("RPC:       registering /proc/net/rpc\n");
 259        if (!proc_net_rpc)
 260                proc_net_rpc = proc_mkdir("rpc", init_net.proc_net);
 261}
 262
 263void
 264rpc_proc_exit(void)
 265{
 266        dprintk("RPC:       unregistering /proc/net/rpc\n");
 267        if (proc_net_rpc) {
 268                proc_net_rpc = NULL;
 269                remove_proc_entry("rpc", init_net.proc_net);
 270        }
 271}
 272
 273