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net/sunrpc/stats.c
7.5 KB
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/* * 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> |
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#include <linux/slab.h> |
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#include <linux/init.h> #include <linux/kernel.h> |
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#include <linux/proc_fs.h> #include <linux/seq_file.h> #include <linux/sunrpc/clnt.h> #include <linux/sunrpc/svcsock.h> |
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#include <linux/sunrpc/metrics.h> |
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#include <linux/rcupdate.h> |
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|
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#include "netns.h" |
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|
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#define RPCDBG_FACILITY RPCDBG_MISC |
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/* * 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; |
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unsigned int i, j; |
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seq_printf(seq, |
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"net %u %u %u %u ", |
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statp->netcnt, statp->netudpcnt, statp->nettcpcnt, statp->nettcpconn); seq_printf(seq, |
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"rpc %u %u %u ", |
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statp->rpccnt, statp->rpcretrans, statp->rpcauthrefresh); for (i = 0; i < prog->nrvers; i++) { const struct rpc_version *vers = prog->version[i]; if (!vers) continue; |
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seq_printf(seq, "proc%u %u", |
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vers->number, vers->nrprocs); for (j = 0; j < vers->nrprocs; j++) |
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seq_printf(seq, " %u", vers->counts[j]); |
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seq_putc(seq, ' '); } return 0; } static int rpc_proc_open(struct inode *inode, struct file *file) { |
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return single_open(file, rpc_proc_show, PDE_DATA(inode)); |
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} |
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static const struct file_operations rpc_proc_fops = { |
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.owner = THIS_MODULE, .open = rpc_proc_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, }; /* * Get RPC server stats */ |
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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_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 ", |
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statp->netcnt, statp->netudpcnt, statp->nettcpcnt, statp->nettcpconn); seq_printf(seq, |
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"rpc %u %u %u %u %u ", |
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statp->rpccnt, statp->rpcbadfmt+statp->rpcbadauth+statp->rpcbadclnt, statp->rpcbadfmt, statp->rpcbadauth, statp->rpcbadclnt); for (i = 0; i < prog->pg_nvers; i++) { |
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vers = prog->pg_vers[i]; if (!vers) |
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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++) seq_printf(seq, " %u", vers->vs_count[j]); |
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seq_putc(seq, ' '); } } |
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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 * @clnt: RPC program, version, and xprt * */ struct rpc_iostats *rpc_alloc_iostats(struct rpc_clnt *clnt) { |
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struct rpc_iostats *stats; int i; stats = kcalloc(clnt->cl_maxproc, sizeof(*stats), GFP_KERNEL); if (stats) { for (i = 0; i < clnt->cl_maxproc; i++) spin_lock_init(&stats[i].om_lock); } return stats; |
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} |
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EXPORT_SYMBOL_GPL(rpc_alloc_iostats); |
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/** * rpc_free_iostats - release an rpc_iostats structure * @stats: doomed rpc_iostats structure * */ void rpc_free_iostats(struct rpc_iostats *stats) { kfree(stats); } |
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EXPORT_SYMBOL_GPL(rpc_free_iostats); |
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/** |
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* rpc_count_iostats_metrics - tally up per-task stats |
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* @task: completed rpc_task |
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* @op_metrics: stat structure for OP that will accumulate stats from @task |
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*/ |
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void rpc_count_iostats_metrics(const struct rpc_task *task, struct rpc_iostats *op_metrics) |
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{ struct rpc_rqst *req = task->tk_rqstp; |
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ktime_t delta, now; |
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|
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if (!op_metrics || !req) |
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return; |
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now = ktime_get(); |
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spin_lock(&op_metrics->om_lock); |
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op_metrics->om_ops++; |
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/* kernel API: om_ops must never become larger than om_ntrans */ op_metrics->om_ntrans += max(req->rq_ntrans, 1); |
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op_metrics->om_timeouts += task->tk_timeouts; |
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op_metrics->om_bytes_sent += req->rq_xmit_bytes_sent; |
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op_metrics->om_bytes_recv += req->rq_reply_bytes_recvd; |
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if (ktime_to_ns(req->rq_xtime)) { delta = ktime_sub(req->rq_xtime, task->tk_start); op_metrics->om_queue = ktime_add(op_metrics->om_queue, delta); } |
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op_metrics->om_rtt = ktime_add(op_metrics->om_rtt, req->rq_rtt); |
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delta = ktime_sub(now, task->tk_start); |
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op_metrics->om_execute = ktime_add(op_metrics->om_execute, delta); |
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spin_unlock(&op_metrics->om_lock); |
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} |
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EXPORT_SYMBOL_GPL(rpc_count_iostats_metrics); /** * rpc_count_iostats - tally up per-task stats * @task: completed rpc_task * @stats: array of stat structures * * Uses the statidx from @task */ void rpc_count_iostats(const struct rpc_task *task, struct rpc_iostats *stats) { rpc_count_iostats_metrics(task, &stats[task->tk_msg.rpc_proc->p_statidx]); } |
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EXPORT_SYMBOL_GPL(rpc_count_iostats); |
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|
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static void _print_name(struct seq_file *seq, unsigned int op, |
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const struct rpc_procinfo *procs) |
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{ 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); } |
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void rpc_print_iostats(struct seq_file *seq, struct rpc_clnt *clnt) { struct rpc_iostats *stats = clnt->cl_metrics; |
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struct rpc_xprt *xprt; |
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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) ", |
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clnt->cl_prog, clnt->cl_vers, clnt->cl_program->name); |
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|
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rcu_read_lock(); xprt = rcu_dereference(clnt->cl_xprt); |
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if (xprt) xprt->ops->print_stats(xprt, seq); |
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rcu_read_unlock(); |
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seq_printf(seq, "\tper-op statistics "); for (op = 0; op < maxproc; op++) { 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 ", metrics->om_ops, metrics->om_ntrans, metrics->om_timeouts, metrics->om_bytes_sent, metrics->om_bytes_recv, |
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ktime_to_ms(metrics->om_queue), ktime_to_ms(metrics->om_rtt), ktime_to_ms(metrics->om_execute)); |
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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 */ static inline struct proc_dir_entry * |
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do_register(struct net *net, const char *name, void *data, const struct file_operations *fops) |
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{ |
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struct sunrpc_net *sn; |
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|
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dprintk("RPC: registering /proc/net/rpc/%s ", name); |
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sn = net_generic(net, sunrpc_net_id); |
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return proc_create_data(name, 0, sn->proc_net_rpc, fops, data); |
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} struct proc_dir_entry * |
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rpc_proc_register(struct net *net, struct rpc_stat *statp) |
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{ |
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return do_register(net, 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(struct net *net, const char *name) |
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{ |
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struct sunrpc_net *sn; |
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sn = net_generic(net, sunrpc_net_id); |
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remove_proc_entry(name, sn->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 net *net, struct svc_stat *statp, const struct file_operations *fops) |
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{ |
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return do_register(net, 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(struct net *net, const char *name) |
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{ |
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struct sunrpc_net *sn; |
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sn = net_generic(net, sunrpc_net_id); |
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remove_proc_entry(name, sn->proc_net_rpc); |
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} |
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EXPORT_SYMBOL_GPL(svc_proc_unregister); |
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|
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int rpc_proc_init(struct net *net) |
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{ |
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struct sunrpc_net *sn; |
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dprintk("RPC: registering /proc/net/rpc "); |
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sn = net_generic(net, sunrpc_net_id); sn->proc_net_rpc = proc_mkdir("rpc", net->proc_net); if (sn->proc_net_rpc == NULL) return -ENOMEM; return 0; |
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} |
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void rpc_proc_exit(struct net *net) |
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{ |
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dprintk("RPC: unregistering /proc/net/rpc "); |
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remove_proc_entry("rpc", net->proc_net); |
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} |