zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/net/sunrpc/stats.c b/ap/os/linux/linux-3.4.x/net/sunrpc/stats.c
new file mode 100644
index 0000000..bc2068e
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/net/sunrpc/stats.c
@@ -0,0 +1,282 @@
+/*
+ * 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/slab.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 <linux/rcupdate.h>
+
+#include "netns.h"
+
+#define RPCDBG_FACILITY RPCDBG_MISC
+
+/*
+ * 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_GPL(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)
+{
+ return kcalloc(clnt->cl_maxproc, sizeof(struct rpc_iostats), GFP_KERNEL);
+}
+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
+ * @stats: array of stat structures
+ *
+ * Relies on the caller for serialization.
+ */
+void rpc_count_iostats(const struct rpc_task *task, struct rpc_iostats *stats)
+{
+ struct rpc_rqst *req = task->tk_rqstp;
+ struct rpc_iostats *op_metrics;
+ ktime_t delta;
+
+ 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 += req->rq_xmit_bytes_sent;
+ op_metrics->om_bytes_recv += req->rq_reply_bytes_recvd;
+
+ delta = ktime_sub(req->rq_xtime, task->tk_start);
+ op_metrics->om_queue = ktime_add(op_metrics->om_queue, delta);
+
+ op_metrics->om_rtt = ktime_add(op_metrics->om_rtt, req->rq_rtt);
+
+ delta = ktime_sub(ktime_get(), task->tk_start);
+ op_metrics->om_execute = ktime_add(op_metrics->om_execute, delta);
+}
+EXPORT_SYMBOL_GPL(rpc_count_iostats);
+
+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);
+}
+
+void rpc_print_iostats(struct seq_file *seq, struct rpc_clnt *clnt)
+{
+ struct rpc_iostats *stats = clnt->cl_metrics;
+ struct rpc_xprt *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);
+
+ rcu_read_lock();
+ xprt = rcu_dereference(clnt->cl_xprt);
+ if (xprt)
+ xprt->ops->print_stats(xprt, seq);
+ rcu_read_unlock();
+
+ 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,
+ ktime_to_ms(metrics->om_queue),
+ ktime_to_ms(metrics->om_rtt),
+ ktime_to_ms(metrics->om_execute));
+ }
+}
+EXPORT_SYMBOL_GPL(rpc_print_iostats);
+
+/*
+ * Register/unregister RPC proc files
+ */
+static inline struct proc_dir_entry *
+do_register(struct net *net, const char *name, void *data,
+ const struct file_operations *fops)
+{
+ struct sunrpc_net *sn;
+
+ dprintk("RPC: registering /proc/net/rpc/%s\n", name);
+ sn = net_generic(net, sunrpc_net_id);
+ return proc_create_data(name, 0, sn->proc_net_rpc, fops, data);
+}
+
+struct proc_dir_entry *
+rpc_proc_register(struct net *net, struct rpc_stat *statp)
+{
+ return do_register(net, statp->program->name, statp, &rpc_proc_fops);
+}
+EXPORT_SYMBOL_GPL(rpc_proc_register);
+
+void
+rpc_proc_unregister(struct net *net, const char *name)
+{
+ struct sunrpc_net *sn;
+
+ sn = net_generic(net, sunrpc_net_id);
+ remove_proc_entry(name, sn->proc_net_rpc);
+}
+EXPORT_SYMBOL_GPL(rpc_proc_unregister);
+
+struct proc_dir_entry *
+svc_proc_register(struct net *net, struct svc_stat *statp, const struct file_operations *fops)
+{
+ return do_register(net, statp->program->pg_name, statp, fops);
+}
+EXPORT_SYMBOL_GPL(svc_proc_register);
+
+void
+svc_proc_unregister(struct net *net, const char *name)
+{
+ struct sunrpc_net *sn;
+
+ sn = net_generic(net, sunrpc_net_id);
+ remove_proc_entry(name, sn->proc_net_rpc);
+}
+EXPORT_SYMBOL_GPL(svc_proc_unregister);
+
+int rpc_proc_init(struct net *net)
+{
+ struct sunrpc_net *sn;
+
+ dprintk("RPC: registering /proc/net/rpc\n");
+ 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;
+}
+
+void rpc_proc_exit(struct net *net)
+{
+ dprintk("RPC: unregistering /proc/net/rpc\n");
+ remove_proc_entry("rpc", net->proc_net);
+}
+