Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / net / sunrpc / sysctl.c

diff --git a/kernel/net/sunrpc/sysctl.c b/kernel/net/sunrpc/sysctl.c
new file mode 100644 (file)
index 0000000..887f018
--- /dev/null
+++ b/kernel/net/sunrpc/sysctl.c
@@ -0,0 +1,185 @@
+/*
+ * linux/net/sunrpc/sysctl.c
+ *
+ * Sysctl interface to sunrpc module.
+ *
+ * I would prefer to register the sunrpc table below sys/net, but that's
+ * impossible at the moment.
+ */
+
+#include <linux/types.h>
+#include <linux/linkage.h>
+#include <linux/ctype.h>
+#include <linux/fs.h>
+#include <linux/sysctl.h>
+#include <linux/module.h>
+
+#include <asm/uaccess.h>
+#include <linux/sunrpc/types.h>
+#include <linux/sunrpc/sched.h>
+#include <linux/sunrpc/stats.h>
+#include <linux/sunrpc/svc_xprt.h>
+
+#include "netns.h"
+
+/*
+ * Declare the debug flags here
+ */
+unsigned int   rpc_debug;
+EXPORT_SYMBOL_GPL(rpc_debug);
+
+unsigned int   nfs_debug;
+EXPORT_SYMBOL_GPL(nfs_debug);
+
+unsigned int   nfsd_debug;
+EXPORT_SYMBOL_GPL(nfsd_debug);
+
+unsigned int   nlm_debug;
+EXPORT_SYMBOL_GPL(nlm_debug);
+
+#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
+
+static struct ctl_table_header *sunrpc_table_header;
+static struct ctl_table sunrpc_table[];
+
+void
+rpc_register_sysctl(void)
+{
+       if (!sunrpc_table_header)
+               sunrpc_table_header = register_sysctl_table(sunrpc_table);
+}
+
+void
+rpc_unregister_sysctl(void)
+{
+       if (sunrpc_table_header) {
+               unregister_sysctl_table(sunrpc_table_header);
+               sunrpc_table_header = NULL;
+       }
+}
+
+static int proc_do_xprt(struct ctl_table *table, int write,
+                       void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+       char tmpbuf[256];
+       size_t len;
+
+       if ((*ppos && !write) || !*lenp) {
+               *lenp = 0;
+               return 0;
+       }
+       len = svc_print_xprts(tmpbuf, sizeof(tmpbuf));
+       return simple_read_from_buffer(buffer, *lenp, ppos, tmpbuf, len);
+}
+
+static int
+proc_dodebug(struct ctl_table *table, int write,
+                               void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+       char            tmpbuf[20], c, *s;
+       char __user *p;
+       unsigned int    value;
+       size_t          left, len;
+
+       if ((*ppos && !write) || !*lenp) {
+               *lenp = 0;
+               return 0;
+       }
+
+       left = *lenp;
+
+       if (write) {
+               if (!access_ok(VERIFY_READ, buffer, left))
+                       return -EFAULT;
+               p = buffer;
+               while (left && __get_user(c, p) >= 0 && isspace(c))
+                       left--, p++;
+               if (!left)
+                       goto done;
+
+               if (left > sizeof(tmpbuf) - 1)
+                       return -EINVAL;
+               if (copy_from_user(tmpbuf, p, left))
+                       return -EFAULT;
+               tmpbuf[left] = '\0';
+
+               for (s = tmpbuf, value = 0; '0' <= *s && *s <= '9'; s++, left--)
+                       value = 10 * value + (*s - '0');
+               if (*s && !isspace(*s))
+                       return -EINVAL;
+               while (left && isspace(*s))
+                       left--, s++;
+               *(unsigned int *) table->data = value;
+               /* Display the RPC tasks on writing to rpc_debug */
+               if (strcmp(table->procname, "rpc_debug") == 0)
+                       rpc_show_tasks(&init_net);
+       } else {
+               if (!access_ok(VERIFY_WRITE, buffer, left))
+                       return -EFAULT;
+               len = sprintf(tmpbuf, "%d", *(unsigned int *) table->data);
+               if (len > left)
+                       len = left;
+               if (__copy_to_user(buffer, tmpbuf, len))
+                       return -EFAULT;
+               if ((left -= len) > 0) {
+                       if (put_user('\n', (char __user *)buffer + len))
+                               return -EFAULT;
+                       left--;
+               }
+       }
+
+done:
+       *lenp -= left;
+       *ppos += *lenp;
+       return 0;
+}
+
+
+static struct ctl_table debug_table[] = {
+       {
+               .procname       = "rpc_debug",
+               .data           = &rpc_debug,
+               .maxlen         = sizeof(int),
+               .mode           = 0644,
+               .proc_handler   = proc_dodebug
+       },
+       {
+               .procname       = "nfs_debug",
+               .data           = &nfs_debug,
+               .maxlen         = sizeof(int),
+               .mode           = 0644,
+               .proc_handler   = proc_dodebug
+       },
+       {
+               .procname       = "nfsd_debug",
+               .data           = &nfsd_debug,
+               .maxlen         = sizeof(int),
+               .mode           = 0644,
+               .proc_handler   = proc_dodebug
+       },
+       {
+               .procname       = "nlm_debug",
+               .data           = &nlm_debug,
+               .maxlen         = sizeof(int),
+               .mode           = 0644,
+               .proc_handler   = proc_dodebug
+       },
+       {
+               .procname       = "transports",
+               .maxlen         = 256,
+               .mode           = 0444,
+               .proc_handler   = proc_do_xprt,
+       },
+       { }
+};
+
+static struct ctl_table sunrpc_table[] = {
+       {
+               .procname       = "sunrpc",
+               .mode           = 0555,
+               .child          = debug_table
+       },
+       { }
+};
+
+#endif