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authorTaku Izumi <izumi.taku@jp.fujitsu.com>2010-12-09 15:17:13 +0000
committerDavid S. Miller <davem@davemloft.net>2010-12-10 16:24:33 -0800
commitf073c7ca29a4a7e14060d9d3ddf09bfbb7cd9cc0 (patch)
treed545b7e77908ffb101c16d1be8cfe641828fa9b9 /drivers/net/bonding/bond_debugfs.c
parent6c2c9d964e71770e7d6efc1a82f3621005d12185 (diff)
downloadlinux-f073c7ca29a4a7e14060d9d3ddf09bfbb7cd9cc0.tar.bz2
bonding: add the debugfs facility to the bonding driver
This patch provides the debugfs facility to the bonding driver. The "bonding" directory is created in the debugfs root and directories of each bonding interface (like bond0, bond1...) are created in that. # mount -t debugfs none /sys/kernel/debug # ls /sys/kernel/debug/bonding bond0 bond1 Signed-off-by: Taku Izumi <izumi.taku@jp.fujitsu.com> Signed-off-by: Jay Vosburgh <fubar@us.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/bonding/bond_debugfs.c')
-rw-r--r--drivers/net/bonding/bond_debugfs.c96
1 files changed, 96 insertions, 0 deletions
diff --git a/drivers/net/bonding/bond_debugfs.c b/drivers/net/bonding/bond_debugfs.c
new file mode 100644
index 000000000000..ae1eb2fc3a47
--- /dev/null
+++ b/drivers/net/bonding/bond_debugfs.c
@@ -0,0 +1,96 @@
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/netdevice.h>
+
+#include "bonding.h"
+
+#ifdef CONFIG_DEBUG_FS
+
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+
+static struct dentry *bonding_debug_root;
+
+void bond_debug_register(struct bonding *bond)
+{
+ if (!bonding_debug_root)
+ return;
+
+ bond->debug_dir =
+ debugfs_create_dir(bond->dev->name, bonding_debug_root);
+
+ if (!bond->debug_dir) {
+ pr_warning("%s: Warning: failed to register to debugfs\n",
+ bond->dev->name);
+ return;
+ }
+}
+
+void bond_debug_unregister(struct bonding *bond)
+{
+ if (!bonding_debug_root)
+ return;
+
+ debugfs_remove_recursive(bond->debug_dir);
+}
+
+void bond_debug_reregister(struct bonding *bond)
+{
+ struct dentry *d;
+
+ if (!bonding_debug_root)
+ return;
+
+ d = debugfs_rename(bonding_debug_root, bond->debug_dir,
+ bonding_debug_root, bond->dev->name);
+ if (d) {
+ bond->debug_dir = d;
+ } else {
+ pr_warning("%s: Warning: failed to reregister, "
+ "so just unregister old one\n",
+ bond->dev->name);
+ bond_debug_unregister(bond);
+ }
+}
+
+void bond_create_debugfs(void)
+{
+ bonding_debug_root = debugfs_create_dir("bonding", NULL);
+
+ if (!bonding_debug_root) {
+ pr_warning("Warning: Cannot create bonding directory"
+ " in debugfs\n");
+ }
+}
+
+void bond_destroy_debugfs(void)
+{
+ debugfs_remove_recursive(bonding_debug_root);
+ bonding_debug_root = NULL;
+}
+
+
+#else /* !CONFIG_DEBUG_FS */
+
+void bond_debug_register(struct bonding *bond)
+{
+}
+
+void bond_debug_unregister(struct bonding *bond)
+{
+}
+
+void bond_debug_reregister(struct bonding *bond)
+{
+}
+
+void bond_create_debugfs(void)
+{
+}
+
+void bond_destroy_debugfs(void)
+{
+}
+
+#endif /* CONFIG_DEBUG_FS */