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343 lines
8.6 KiB
343 lines
8.6 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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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 <[email protected]> |
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*/ |
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#include <linux/module.h> |
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#include <linux/slab.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 <linux/rcupdate.h> |
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#include <trace/events/sunrpc.h> |
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#include "netns.h" |
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#define RPCDBG_FACILITY RPCDBG_MISC |
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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", vers->counts[j]); |
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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_DATA(inode)); |
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} |
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static const struct proc_ops rpc_proc_ops = { |
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.proc_open = rpc_proc_open, |
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.proc_read = seq_read, |
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.proc_lseek = seq_lseek, |
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.proc_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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{ |
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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\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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vers = prog->pg_vers[i]; |
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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++) |
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seq_printf(seq, " %u", vers->vs_count[j]); |
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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 *stats; |
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int i; |
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stats = kcalloc(clnt->cl_maxproc, sizeof(*stats), GFP_KERNEL); |
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if (stats) { |
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for (i = 0; i < clnt->cl_maxproc; i++) |
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spin_lock_init(&stats[i].om_lock); |
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} |
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return stats; |
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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_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, |
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struct rpc_iostats *op_metrics) |
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{ |
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struct rpc_rqst *req = task->tk_rqstp; |
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ktime_t backlog, execute, now; |
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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 */ |
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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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backlog = 0; |
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if (ktime_to_ns(req->rq_xtime)) { |
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backlog = ktime_sub(req->rq_xtime, task->tk_start); |
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op_metrics->om_queue = ktime_add(op_metrics->om_queue, backlog); |
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} |
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op_metrics->om_rtt = ktime_add(op_metrics->om_rtt, req->rq_rtt); |
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execute = ktime_sub(now, task->tk_start); |
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op_metrics->om_execute = ktime_add(op_metrics->om_execute, execute); |
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if (task->tk_status < 0) |
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op_metrics->om_error_status++; |
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spin_unlock(&op_metrics->om_lock); |
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trace_rpc_stats_latency(req->rq_task, backlog, req->rq_rtt, execute); |
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} |
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EXPORT_SYMBOL_GPL(rpc_count_iostats_metrics); |
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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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* @stats: array of stat structures |
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* |
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* Uses the statidx from @task |
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*/ |
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void rpc_count_iostats(const struct rpc_task *task, struct rpc_iostats *stats) |
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{ |
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rpc_count_iostats_metrics(task, |
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&stats[task->tk_msg.rpc_proc->p_statidx]); |
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} |
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EXPORT_SYMBOL_GPL(rpc_count_iostats); |
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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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{ |
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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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static void _add_rpc_iostats(struct rpc_iostats *a, struct rpc_iostats *b) |
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{ |
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a->om_ops += b->om_ops; |
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a->om_ntrans += b->om_ntrans; |
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a->om_timeouts += b->om_timeouts; |
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a->om_bytes_sent += b->om_bytes_sent; |
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a->om_bytes_recv += b->om_bytes_recv; |
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a->om_queue = ktime_add(a->om_queue, b->om_queue); |
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a->om_rtt = ktime_add(a->om_rtt, b->om_rtt); |
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a->om_execute = ktime_add(a->om_execute, b->om_execute); |
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a->om_error_status += b->om_error_status; |
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} |
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static void _print_rpc_iostats(struct seq_file *seq, struct rpc_iostats *stats, |
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int op, const struct rpc_procinfo *procs) |
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{ |
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_print_name(seq, op, procs); |
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seq_printf(seq, "%lu %lu %lu %llu %llu %llu %llu %llu %lu\n", |
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stats->om_ops, |
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stats->om_ntrans, |
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stats->om_timeouts, |
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stats->om_bytes_sent, |
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stats->om_bytes_recv, |
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ktime_to_ms(stats->om_queue), |
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ktime_to_ms(stats->om_rtt), |
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ktime_to_ms(stats->om_execute), |
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stats->om_error_status); |
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} |
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static int do_print_stats(struct rpc_clnt *clnt, struct rpc_xprt *xprt, void *seqv) |
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{ |
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struct seq_file *seq = seqv; |
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xprt->ops->print_stats(xprt, seq); |
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return 0; |
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} |
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void rpc_clnt_show_stats(struct seq_file *seq, struct rpc_clnt *clnt) |
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{ |
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unsigned int op, maxproc = clnt->cl_maxproc; |
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if (!clnt->cl_metrics) |
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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_program->name); |
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rpc_clnt_iterate_for_each_xprt(clnt, do_print_stats, 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 stats = {}; |
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struct rpc_clnt *next = clnt; |
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do { |
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_add_rpc_iostats(&stats, &next->cl_metrics[op]); |
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if (next == next->cl_parent) |
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break; |
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next = next->cl_parent; |
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} while (next); |
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_print_rpc_iostats(seq, &stats, op, clnt->cl_procinfo); |
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} |
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} |
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EXPORT_SYMBOL_GPL(rpc_clnt_show_stats); |
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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(struct net *net, const char *name, void *data, |
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const struct proc_ops *proc_ops) |
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{ |
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struct sunrpc_net *sn; |
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dprintk("RPC: registering /proc/net/rpc/%s\n", 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, proc_ops, data); |
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} |
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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_ops); |
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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 proc_ops *proc_ops) |
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{ |
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return do_register(net, statp->program->pg_name, statp, proc_ops); |
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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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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\n"); |
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sn = net_generic(net, sunrpc_net_id); |
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sn->proc_net_rpc = proc_mkdir("rpc", net->proc_net); |
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if (sn->proc_net_rpc == NULL) |
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return -ENOMEM; |
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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\n"); |
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remove_proc_entry("rpc", net->proc_net); |
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}
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