summaryrefslogtreecommitdiff
path: root/net/sunrpc/sysctl.c
diff options
context:
space:
mode:
Diffstat (limited to 'net/sunrpc/sysctl.c')
-rw-r--r--net/sunrpc/sysctl.c193
1 files changed, 193 insertions, 0 deletions
diff --git a/net/sunrpc/sysctl.c b/net/sunrpc/sysctl.c
new file mode 100644
index 000000000000..1b9616a12e24
--- /dev/null
+++ b/net/sunrpc/sysctl.c
@@ -0,0 +1,193 @@
+/*
+ * 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/config.h>
+#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/xprt.h>
+
+/*
+ * Declare the debug flags here
+ */
+unsigned int rpc_debug;
+unsigned int nfs_debug;
+unsigned int nfsd_debug;
+unsigned int nlm_debug;
+
+#ifdef RPC_DEBUG
+
+static struct ctl_table_header *sunrpc_table_header;
+static ctl_table sunrpc_table[];
+
+void
+rpc_register_sysctl(void)
+{
+ if (!sunrpc_table_header) {
+ sunrpc_table_header = register_sysctl_table(sunrpc_table, 1);
+#ifdef CONFIG_PROC_FS
+ if (sunrpc_table[0].de)
+ sunrpc_table[0].de->owner = THIS_MODULE;
+#endif
+ }
+
+}
+
+void
+rpc_unregister_sysctl(void)
+{
+ if (sunrpc_table_header) {
+ unregister_sysctl_table(sunrpc_table_header);
+ sunrpc_table_header = NULL;
+ }
+}
+
+static int
+proc_dodebug(ctl_table *table, int write, struct file *file,
+ 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 (table->ctl_name == CTL_RPCDEBUG) {
+ rpc_show_tasks();
+ }
+ } 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 unsigned int min_slot_table_size = RPC_MIN_SLOT_TABLE;
+static unsigned int max_slot_table_size = RPC_MAX_SLOT_TABLE;
+
+static ctl_table debug_table[] = {
+ {
+ .ctl_name = CTL_RPCDEBUG,
+ .procname = "rpc_debug",
+ .data = &rpc_debug,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dodebug
+ },
+ {
+ .ctl_name = CTL_NFSDEBUG,
+ .procname = "nfs_debug",
+ .data = &nfs_debug,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dodebug
+ },
+ {
+ .ctl_name = CTL_NFSDDEBUG,
+ .procname = "nfsd_debug",
+ .data = &nfsd_debug,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dodebug
+ },
+ {
+ .ctl_name = CTL_NLMDEBUG,
+ .procname = "nlm_debug",
+ .data = &nlm_debug,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dodebug
+ },
+ {
+ .ctl_name = CTL_SLOTTABLE_UDP,
+ .procname = "udp_slot_table_entries",
+ .data = &xprt_udp_slot_table_entries,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_minmax,
+ .strategy = &sysctl_intvec,
+ .extra1 = &min_slot_table_size,
+ .extra2 = &max_slot_table_size
+ },
+ {
+ .ctl_name = CTL_SLOTTABLE_TCP,
+ .procname = "tcp_slot_table_entries",
+ .data = &xprt_tcp_slot_table_entries,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_minmax,
+ .strategy = &sysctl_intvec,
+ .extra1 = &min_slot_table_size,
+ .extra2 = &max_slot_table_size
+ },
+ { .ctl_name = 0 }
+};
+
+static ctl_table sunrpc_table[] = {
+ {
+ .ctl_name = CTL_SUNRPC,
+ .procname = "sunrpc",
+ .mode = 0555,
+ .child = debug_table
+ },
+ { .ctl_name = 0 }
+};
+
+#endif