/* * 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/sched.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> #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; 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 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; 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'); } } /** * 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(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(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(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) { struct proc_dir_entry *ent; rpc_proc_init(); dprintk("RPC: registering /proc/net/rpc/%s\n", name); ent = create_proc_entry(name, 0, proc_net_rpc); if (ent) { ent->proc_fops = fops; ent->data = data; } return ent; } struct proc_dir_entry * rpc_proc_register(struct rpc_stat *statp) { return do_register(statp->program->name, statp, &rpc_proc_fops); } void rpc_proc_unregister(const char *name) { remove_proc_entry(name, proc_net_rpc); } 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); } void svc_proc_unregister(const char *name) { remove_proc_entry(name, proc_net_rpc); } 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", 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("net/rpc", NULL); } }