Merge tag 'v2.6.38' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

[mv-sheeva.git] / drivers / net / bonding / bond_debugfs.c

diff --git a/drivers/net/bonding/bond_debugfs.c b/drivers/net/bonding/bond_debugfs.c
new file mode 100644 (file)
index 0000000..3680aa2
--- /dev/null
+++ b/drivers/net/bonding/bond_debugfs.c
@@ -0,0 +1,146 @@
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/netdevice.h>
+
+#include "bonding.h"
+#include "bond_alb.h"
+
+#ifdef CONFIG_DEBUG_FS
+
+#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->params.mode != BOND_MODE_ALB)
+               return 0;
+
+       seq_printf(m, "SourceIP        DestinationIP   "
+                       "Destination MAC   DEV\n");
+
+       spin_lock_bh(&(BOND_ALB_INFO(bond).rx_hashtbl_lock));
+
+       hash_index = bond_info->rx_hashtbl_head;
+       for (; hash_index != RLB_NULL_INDEX; hash_index = client_info->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_ALB_INFO(bond).rx_hashtbl_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) {
+               pr_warning("%s: Warning: failed to register to debugfs\n",
+                       bond->dev->name);
+               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 {
+               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 */