1 files changed, 175 insertions, 0 deletions

diff --git a/net/sunrpc/stats.c b/net/sunrpc/stats.c
new file mode 100644
index 000000000000..9b67dc19944c
--- /dev/null
+++ b/net/sunrpc/stats.c
@@ -0,0 +1,175 @@
+/*
+ * 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>
+
+#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 %d %d %d %d\n",
+                        statp->netcnt,
+                        statp->netudpcnt,
+                        statp->nettcpcnt,
+                        statp->nettcpconn);
+        seq_printf(seq,
+                "rpc %d %d %d\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%d %d",
+                                        vers->number, vers->nrprocs);
+                for (j = 0; j < vers->nrprocs; j++)
+                        seq_printf(seq, " %d",
+                                        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 %d %d %d %d\n",
+                        statp->netcnt,
+                        statp->netudpcnt,
+                        statp->nettcpcnt,
+                        statp->nettcpconn);
+        seq_printf(seq,
+                "rpc %d %d %d %d %d\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 %d", i, vers->vs_nproc);
+                for (j = 0; j < vers->vs_nproc; j++, proc++)
+                        seq_printf(seq, " %d", proc->pc_count);
+                seq_putc(seq, '\n');
+        }
+}
+
+/*
+ * Register/unregister RPC proc files
+ */
+static inline struct proc_dir_entry *
+do_register(const char *name, void *data, 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, 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);
+        }
+}
+