281 lines
6.7 KiB
C
281 lines
6.7 KiB
C
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/*
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* linux/net/sunrpc/stats.c
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*
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* procfs-based user access to generic RPC statistics. The stats files
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* reside in /proc/net/rpc.
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*
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* The read routines assume that the buffer passed in is just big enough.
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* If you implement an RPC service that has its own stats routine which
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* appends the generic RPC stats, make sure you don't exceed the PAGE_SIZE
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* limit.
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*
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* Copyright (C) 1995, 1996, 1997 Olaf Kirch <okir@monad.swb.de>
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include <linux/sunrpc/clnt.h>
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#include <linux/sunrpc/svcsock.h>
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#include <linux/sunrpc/metrics.h>
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#include <net/net_namespace.h>
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#define RPCDBG_FACILITY RPCDBG_MISC
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struct proc_dir_entry *proc_net_rpc = NULL;
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/*
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* Get RPC client stats
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*/
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static int rpc_proc_show(struct seq_file *seq, void *v) {
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const struct rpc_stat *statp = seq->private;
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const struct rpc_program *prog = statp->program;
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unsigned int i, j;
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seq_printf(seq,
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"net %u %u %u %u\n",
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statp->netcnt,
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statp->netudpcnt,
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statp->nettcpcnt,
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statp->nettcpconn);
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seq_printf(seq,
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"rpc %u %u %u\n",
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statp->rpccnt,
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statp->rpcretrans,
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statp->rpcauthrefresh);
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for (i = 0; i < prog->nrvers; i++) {
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const struct rpc_version *vers = prog->version[i];
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if (!vers)
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continue;
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seq_printf(seq, "proc%u %u",
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vers->number, vers->nrprocs);
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for (j = 0; j < vers->nrprocs; j++)
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seq_printf(seq, " %u",
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vers->procs[j].p_count);
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seq_putc(seq, '\n');
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}
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return 0;
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}
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static int rpc_proc_open(struct inode *inode, struct file *file)
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{
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return single_open(file, rpc_proc_show, PDE(inode)->data);
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}
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static const struct file_operations rpc_proc_fops = {
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.owner = THIS_MODULE,
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.open = rpc_proc_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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/*
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* Get RPC server stats
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*/
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void svc_seq_show(struct seq_file *seq, const struct svc_stat *statp) {
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const struct svc_program *prog = statp->program;
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const struct svc_procedure *proc;
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const struct svc_version *vers;
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unsigned int i, j;
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seq_printf(seq,
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"net %u %u %u %u\n",
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statp->netcnt,
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statp->netudpcnt,
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statp->nettcpcnt,
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statp->nettcpconn);
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seq_printf(seq,
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"rpc %u %u %u %u %u\n",
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statp->rpccnt,
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statp->rpcbadfmt+statp->rpcbadauth+statp->rpcbadclnt,
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statp->rpcbadfmt,
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statp->rpcbadauth,
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statp->rpcbadclnt);
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for (i = 0; i < prog->pg_nvers; i++) {
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if (!(vers = prog->pg_vers[i]) || !(proc = vers->vs_proc))
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continue;
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seq_printf(seq, "proc%d %u", i, vers->vs_nproc);
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for (j = 0; j < vers->vs_nproc; j++, proc++)
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seq_printf(seq, " %u", proc->pc_count);
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seq_putc(seq, '\n');
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}
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}
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EXPORT_SYMBOL_GPL(svc_seq_show);
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/**
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* rpc_alloc_iostats - allocate an rpc_iostats structure
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* @clnt: RPC program, version, and xprt
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*
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*/
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struct rpc_iostats *rpc_alloc_iostats(struct rpc_clnt *clnt)
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{
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struct rpc_iostats *new;
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new = kcalloc(clnt->cl_maxproc, sizeof(struct rpc_iostats), GFP_KERNEL);
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return new;
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}
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EXPORT_SYMBOL_GPL(rpc_alloc_iostats);
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/**
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* rpc_free_iostats - release an rpc_iostats structure
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* @stats: doomed rpc_iostats structure
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*
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*/
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void rpc_free_iostats(struct rpc_iostats *stats)
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{
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kfree(stats);
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}
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EXPORT_SYMBOL_GPL(rpc_free_iostats);
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/**
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* rpc_count_iostats - tally up per-task stats
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* @task: completed rpc_task
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*
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* Relies on the caller for serialization.
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*/
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void rpc_count_iostats(struct rpc_task *task)
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{
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struct rpc_rqst *req = task->tk_rqstp;
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struct rpc_iostats *stats;
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struct rpc_iostats *op_metrics;
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long rtt, execute, queue;
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if (!task->tk_client || !task->tk_client->cl_metrics || !req)
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return;
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stats = task->tk_client->cl_metrics;
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op_metrics = &stats[task->tk_msg.rpc_proc->p_statidx];
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op_metrics->om_ops++;
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op_metrics->om_ntrans += req->rq_ntrans;
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op_metrics->om_timeouts += task->tk_timeouts;
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op_metrics->om_bytes_sent += task->tk_bytes_sent;
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op_metrics->om_bytes_recv += req->rq_reply_bytes_recvd;
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queue = (long)req->rq_xtime - task->tk_start;
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if (queue < 0)
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queue = -queue;
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op_metrics->om_queue += queue;
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rtt = task->tk_rtt;
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if (rtt < 0)
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rtt = -rtt;
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op_metrics->om_rtt += rtt;
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execute = (long)jiffies - task->tk_start;
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if (execute < 0)
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execute = -execute;
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op_metrics->om_execute += execute;
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}
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static void _print_name(struct seq_file *seq, unsigned int op,
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struct rpc_procinfo *procs)
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{
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if (procs[op].p_name)
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seq_printf(seq, "\t%12s: ", procs[op].p_name);
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else if (op == 0)
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seq_printf(seq, "\t NULL: ");
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else
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seq_printf(seq, "\t%12u: ", op);
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}
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#define MILLISECS_PER_JIFFY (1000 / HZ)
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void rpc_print_iostats(struct seq_file *seq, struct rpc_clnt *clnt)
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{
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struct rpc_iostats *stats = clnt->cl_metrics;
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struct rpc_xprt *xprt = clnt->cl_xprt;
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unsigned int op, maxproc = clnt->cl_maxproc;
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if (!stats)
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return;
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seq_printf(seq, "\tRPC iostats version: %s ", RPC_IOSTATS_VERS);
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seq_printf(seq, "p/v: %u/%u (%s)\n",
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clnt->cl_prog, clnt->cl_vers, clnt->cl_protname);
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if (xprt)
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xprt->ops->print_stats(xprt, seq);
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seq_printf(seq, "\tper-op statistics\n");
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for (op = 0; op < maxproc; op++) {
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struct rpc_iostats *metrics = &stats[op];
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_print_name(seq, op, clnt->cl_procinfo);
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seq_printf(seq, "%lu %lu %lu %Lu %Lu %Lu %Lu %Lu\n",
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metrics->om_ops,
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metrics->om_ntrans,
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metrics->om_timeouts,
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metrics->om_bytes_sent,
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metrics->om_bytes_recv,
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metrics->om_queue * MILLISECS_PER_JIFFY,
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metrics->om_rtt * MILLISECS_PER_JIFFY,
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metrics->om_execute * MILLISECS_PER_JIFFY);
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}
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}
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EXPORT_SYMBOL_GPL(rpc_print_iostats);
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/*
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* Register/unregister RPC proc files
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*/
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static inline struct proc_dir_entry *
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do_register(const char *name, void *data, const struct file_operations *fops)
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{
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rpc_proc_init();
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dprintk("RPC: registering /proc/net/rpc/%s\n", name);
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return proc_create_data(name, 0, proc_net_rpc, fops, data);
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}
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struct proc_dir_entry *
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rpc_proc_register(struct rpc_stat *statp)
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{
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return do_register(statp->program->name, statp, &rpc_proc_fops);
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}
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EXPORT_SYMBOL_GPL(rpc_proc_register);
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void
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rpc_proc_unregister(const char *name)
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{
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remove_proc_entry(name, proc_net_rpc);
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}
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EXPORT_SYMBOL_GPL(rpc_proc_unregister);
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struct proc_dir_entry *
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svc_proc_register(struct svc_stat *statp, const struct file_operations *fops)
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{
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return do_register(statp->program->pg_name, statp, fops);
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}
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EXPORT_SYMBOL_GPL(svc_proc_register);
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void
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svc_proc_unregister(const char *name)
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{
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remove_proc_entry(name, proc_net_rpc);
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}
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EXPORT_SYMBOL_GPL(svc_proc_unregister);
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void
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rpc_proc_init(void)
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{
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dprintk("RPC: registering /proc/net/rpc\n");
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if (!proc_net_rpc)
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proc_net_rpc = proc_mkdir("rpc", init_net.proc_net);
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}
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void
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rpc_proc_exit(void)
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{
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dprintk("RPC: unregistering /proc/net/rpc\n");
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if (proc_net_rpc) {
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proc_net_rpc = NULL;
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remove_proc_entry("rpc", init_net.proc_net);
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}
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}
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