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root/net/sunrpc/stats.c

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DEFINITIONS

This source file includes following definitions.
  1. rpc_proc_show
  2. rpc_proc_open
  3. svc_seq_show
  4. rpc_alloc_iostats
  5. rpc_free_iostats
  6. rpc_count_iostats
  7. _print_name
  8. rpc_print_iostats
  9. do_register
  10. rpc_proc_register
  11. rpc_proc_unregister
  12. svc_proc_register
  13. svc_proc_unregister
  14. rpc_proc_init
  15. rpc_proc_exit

/*
 * linux/net/sunrpc/stats.c
 *
 * procfs-based user access to generic RPC statistics. The stats files
 * reside in /proc/net/rpc.
 *
 * The read routines assume that the buffer passed in is just big enough.
 * If you implement an RPC service that has its own stats routine which
 * appends the generic RPC stats, make sure you don't exceed the PAGE_SIZE
 * limit.
 *
 * Copyright (C) 1995, 1996, 1997 Olaf Kirch <okir@monad.swb.de>
 */

#include <linux/module.h>

#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/svcsock.h>
#include <linux/sunrpc/metrics.h>
#include <net/net_namespace.h>

#define RPCDBG_FACILITY RPCDBG_MISC

struct proc_dir_entry   *proc_net_rpc = NULL;

/*
 * Get RPC client stats
 */
static int rpc_proc_show(struct seq_file *seq, void *v) {
        const struct rpc_stat   *statp = seq->private;
        const struct rpc_program *prog = statp->program;
        unsigned int i, j;

        seq_printf(seq,
                "net %u %u %u %u\n",
                        statp->netcnt,
                        statp->netudpcnt,
                        statp->nettcpcnt,
                        statp->nettcpconn);
        seq_printf(seq,
                "rpc %u %u %u\n",
                        statp->rpccnt,
                        statp->rpcretrans,
                        statp->rpcauthrefresh);

        for (i = 0; i < prog->nrvers; i++) {
                const struct rpc_version *vers = prog->version[i];
                if (!vers)
                        continue;
                seq_printf(seq, "proc%u %u",
                                        vers->number, vers->nrprocs);
                for (j = 0; j < vers->nrprocs; j++)
                        seq_printf(seq, " %u",
                                        vers->procs[j].p_count);
                seq_putc(seq, '\n');
        }
        return 0;
}

static int rpc_proc_open(struct inode *inode, struct file *file)
{
        return single_open(file, rpc_proc_show, PDE(inode)->data);
}

static const struct file_operations rpc_proc_fops = {
        .owner = THIS_MODULE,
        .open = rpc_proc_open,
        .read  = seq_read,
        .llseek = seq_lseek,
        .release = single_release,
};

/*
 * Get RPC server stats
 */
void svc_seq_show(struct seq_file *seq, const struct svc_stat *statp) {
        const struct svc_program *prog = statp->program;
        const struct svc_procedure *proc;
        const struct svc_version *vers;
        unsigned int i, j;

        seq_printf(seq,
                "net %u %u %u %u\n",
                        statp->netcnt,
                        statp->netudpcnt,
                        statp->nettcpcnt,
                        statp->nettcpconn);
        seq_printf(seq,
                "rpc %u %u %u %u %u\n",
                        statp->rpccnt,
                        statp->rpcbadfmt+statp->rpcbadauth+statp->rpcbadclnt,
                        statp->rpcbadfmt,
                        statp->rpcbadauth,
                        statp->rpcbadclnt);

        for (i = 0; i < prog->pg_nvers; i++) {
                if (!(vers = prog->pg_vers[i]) || !(proc = vers->vs_proc))
                        continue;
                seq_printf(seq, "proc%d %u", i, vers->vs_nproc);
                for (j = 0; j < vers->vs_nproc; j++, proc++)
                        seq_printf(seq, " %u", proc->pc_count);
                seq_putc(seq, '\n');
        }
}
EXPORT_SYMBOL(svc_seq_show);

/**
 * rpc_alloc_iostats - allocate an rpc_iostats structure
 * @clnt: RPC program, version, and xprt
 *
 */
struct rpc_iostats *rpc_alloc_iostats(struct rpc_clnt *clnt)
{
        struct rpc_iostats *new;
        new = kcalloc(clnt->cl_maxproc, sizeof(struct rpc_iostats), GFP_KERNEL);
        return new;
}
EXPORT_SYMBOL_GPL(rpc_alloc_iostats);

/**
 * rpc_free_iostats - release an rpc_iostats structure
 * @stats: doomed rpc_iostats structure
 *
 */
void rpc_free_iostats(struct rpc_iostats *stats)
{
        kfree(stats);
}
EXPORT_SYMBOL_GPL(rpc_free_iostats);

/**
 * rpc_count_iostats - tally up per-task stats
 * @task: completed rpc_task
 *
 * Relies on the caller for serialization.
 */
void rpc_count_iostats(struct rpc_task *task)
{
        struct rpc_rqst *req = task->tk_rqstp;
        struct rpc_iostats *stats = task->tk_client->cl_metrics;
        struct rpc_iostats *op_metrics;
        long rtt, execute, queue;

        if (!stats || !req)
                return;
        op_metrics = &stats[task->tk_msg.rpc_proc->p_statidx];

        op_metrics->om_ops++;
        op_metrics->om_ntrans += req->rq_ntrans;
        op_metrics->om_timeouts += task->tk_timeouts;

        op_metrics->om_bytes_sent += task->tk_bytes_sent;
        op_metrics->om_bytes_recv += req->rq_received;

        queue = (long)req->rq_xtime - task->tk_start;
        if (queue < 0)
                queue = -queue;
        op_metrics->om_queue += queue;

        rtt = task->tk_rtt;
        if (rtt < 0)
                rtt = -rtt;
        op_metrics->om_rtt += rtt;

        execute = (long)jiffies - task->tk_start;
        if (execute < 0)
                execute = -execute;
        op_metrics->om_execute += execute;
}

static void _print_name(struct seq_file *seq, unsigned int op,
                        struct rpc_procinfo *procs)
{
        if (procs[op].p_name)
                seq_printf(seq, "\t%12s: ", procs[op].p_name);
        else if (op == 0)
                seq_printf(seq, "\t        NULL: ");
        else
                seq_printf(seq, "\t%12u: ", op);
}

#define MILLISECS_PER_JIFFY     (1000 / HZ)

void rpc_print_iostats(struct seq_file *seq, struct rpc_clnt *clnt)
{
        struct rpc_iostats *stats = clnt->cl_metrics;
        struct rpc_xprt *xprt = clnt->cl_xprt;
        unsigned int op, maxproc = clnt->cl_maxproc;

        if (!stats)
                return;

        seq_printf(seq, "\tRPC iostats version: %s  ", RPC_IOSTATS_VERS);
        seq_printf(seq, "p/v: %u/%u (%s)\n",
                        clnt->cl_prog, clnt->cl_vers, clnt->cl_protname);

        if (xprt)
                xprt->ops->print_stats(xprt, seq);

        seq_printf(seq, "\tper-op statistics\n");
        for (op = 0; op < maxproc; op++) {
                struct rpc_iostats *metrics = &stats[op];
                _print_name(seq, op, clnt->cl_procinfo);
                seq_printf(seq, "%lu %lu %lu %Lu %Lu %Lu %Lu %Lu\n",
                                metrics->om_ops,
                                metrics->om_ntrans,
                                metrics->om_timeouts,
                                metrics->om_bytes_sent,
                                metrics->om_bytes_recv,
                                metrics->om_queue * MILLISECS_PER_JIFFY,
                                metrics->om_rtt * MILLISECS_PER_JIFFY,
                                metrics->om_execute * MILLISECS_PER_JIFFY);
        }
}
EXPORT_SYMBOL_GPL(rpc_print_iostats);

/*
 * Register/unregister RPC proc files
 */
static inline struct proc_dir_entry *
do_register(const char *name, void *data, const struct file_operations *fops)
{
        rpc_proc_init();
        dprintk("RPC:       registering /proc/net/rpc/%s\n", name);

        return proc_create_data(name, 0, proc_net_rpc, fops, data);
}

struct proc_dir_entry *
rpc_proc_register(struct rpc_stat *statp)
{
        return do_register(statp->program->name, statp, &rpc_proc_fops);
}
EXPORT_SYMBOL_GPL(rpc_proc_register);

void
rpc_proc_unregister(const char *name)
{
        remove_proc_entry(name, proc_net_rpc);
}
EXPORT_SYMBOL_GPL(rpc_proc_unregister);

struct proc_dir_entry *
svc_proc_register(struct svc_stat *statp, const struct file_operations *fops)
{
        return do_register(statp->program->pg_name, statp, fops);
}
EXPORT_SYMBOL(svc_proc_register);

void
svc_proc_unregister(const char *name)
{
        remove_proc_entry(name, proc_net_rpc);
}
EXPORT_SYMBOL(svc_proc_unregister);

void
rpc_proc_init(void)
{
        dprintk("RPC:       registering /proc/net/rpc\n");
        if (!proc_net_rpc) {
                struct proc_dir_entry *ent;
                ent = proc_mkdir("rpc", init_net.proc_net);
                if (ent) {
                        ent->owner = THIS_MODULE;
                        proc_net_rpc = ent;
                }
        }
}

void
rpc_proc_exit(void)
{
        dprintk("RPC:       unregistering /proc/net/rpc\n");
        if (proc_net_rpc) {
                proc_net_rpc = NULL;
                remove_proc_entry("rpc", init_net.proc_net);
        }
}


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