File-copy from v4.4.100
This is the result of 'cp' from a linux-stable tree with the 'v4.4.100'
tag checked out (commit 26d6298789e695c9f627ce49a7bbd2286405798a) on
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Please refer to that tree for all history prior to this point.
Change-Id: I8a9ee2aea93cd29c52c847d0ce33091a73ae6afe
diff --git a/drivers/net/bonding/bond_debugfs.c b/drivers/net/bonding/bond_debugfs.c
new file mode 100644
index 0000000..e52e25a
--- /dev/null
+++ b/drivers/net/bonding/bond_debugfs.c
@@ -0,0 +1,141 @@
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/netdevice.h>
+
+#include <net/bonding.h>
+#include <net/bond_alb.h>
+
+#if defined(CONFIG_DEBUG_FS) && !defined(CONFIG_NET_NS)
+
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+
+static struct dentry *bonding_debug_root;
+
+/* Show RLB hash table */
+static int bond_debug_rlb_hash_show(struct seq_file *m, void *v)
+{
+ struct bonding *bond = m->private;
+ struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+ struct rlb_client_info *client_info;
+ u32 hash_index;
+
+ if (BOND_MODE(bond) != BOND_MODE_ALB)
+ return 0;
+
+ seq_printf(m, "SourceIP DestinationIP "
+ "Destination MAC DEV\n");
+
+ spin_lock_bh(&bond->mode_lock);
+
+ hash_index = bond_info->rx_hashtbl_used_head;
+ for (; hash_index != RLB_NULL_INDEX;
+ hash_index = client_info->used_next) {
+ client_info = &(bond_info->rx_hashtbl[hash_index]);
+ seq_printf(m, "%-15pI4 %-15pI4 %-17pM %s\n",
+ &client_info->ip_src,
+ &client_info->ip_dst,
+ &client_info->mac_dst,
+ client_info->slave->dev->name);
+ }
+
+ spin_unlock_bh(&bond->mode_lock);
+
+ return 0;
+}
+
+static int bond_debug_rlb_hash_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, bond_debug_rlb_hash_show, inode->i_private);
+}
+
+static const struct file_operations bond_debug_rlb_hash_fops = {
+ .owner = THIS_MODULE,
+ .open = bond_debug_rlb_hash_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+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) {
+ netdev_warn(bond->dev, "failed to register to debugfs\n");
+ return;
+ }
+
+ debugfs_create_file("rlb_hash_table", 0400, bond->debug_dir,
+ bond, &bond_debug_rlb_hash_fops);
+}
+
+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 {
+ netdev_warn(bond->dev, "failed to reregister, so just unregister old one\n");
+ bond_debug_unregister(bond);
+ }
+}
+
+void bond_create_debugfs(void)
+{
+ bonding_debug_root = debugfs_create_dir("bonding", NULL);
+
+ if (!bonding_debug_root) {
+ pr_warn("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 */