1 // SPDX-License-Identifier: GPL-2.0 2 #include <linux/kernel.h> 3 #include <linux/module.h> 4 #include <linux/device.h> 5 #include <linux/netdevice.h> 6 7 #include <net/bonding.h> 8 #include <net/bond_alb.h> 9 10 #if defined(CONFIG_DEBUG_FS) && !defined(CONFIG_NET_NS) 11 12 #include <linux/debugfs.h> 13 #include <linux/seq_file.h> 14 15 static struct dentry *bonding_debug_root; 16 17 /* Show RLB hash table */ 18 static int bond_debug_rlb_hash_show(struct seq_file *m, void *v) 19 { 20 struct bonding *bond = m->private; 21 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); 22 struct rlb_client_info *client_info; 23 u32 hash_index; 24 25 if (BOND_MODE(bond) != BOND_MODE_ALB) 26 return 0; 27 28 seq_printf(m, "SourceIP DestinationIP " 29 "Destination MAC DEV\n"); 30 31 spin_lock_bh(&bond->mode_lock); 32 33 hash_index = bond_info->rx_hashtbl_used_head; 34 for (; hash_index != RLB_NULL_INDEX; 35 hash_index = client_info->used_next) { 36 client_info = &(bond_info->rx_hashtbl[hash_index]); 37 if (client_info->slave) 38 seq_printf(m, "%-15pI4 %-15pI4 %-17pM %s\n", 39 &client_info->ip_src, 40 &client_info->ip_dst, 41 &client_info->mac_dst, 42 client_info->slave->dev->name); 43 else 44 seq_printf(m, "%-15pI4 %-15pI4 %-17pM (none)\n", 45 &client_info->ip_src, 46 &client_info->ip_dst, 47 &client_info->mac_dst); 48 } 49 50 spin_unlock_bh(&bond->mode_lock); 51 52 return 0; 53 } 54 DEFINE_SHOW_ATTRIBUTE(bond_debug_rlb_hash); 55 56 void bond_debug_register(struct bonding *bond) 57 { 58 bond->debug_dir = 59 debugfs_create_dir(bond->dev->name, bonding_debug_root); 60 61 debugfs_create_file("rlb_hash_table", 0400, bond->debug_dir, 62 bond, &bond_debug_rlb_hash_fops); 63 } 64 65 void bond_debug_unregister(struct bonding *bond) 66 { 67 debugfs_remove_recursive(bond->debug_dir); 68 } 69 70 void bond_debug_reregister(struct bonding *bond) 71 { 72 int err = debugfs_change_name(bond->debug_dir, "%s", bond->dev->name); 73 if (err) { 74 netdev_warn(bond->dev, "failed to reregister, so just unregister old one\n"); 75 bond_debug_unregister(bond); 76 } 77 } 78 79 void __init bond_create_debugfs(void) 80 { 81 bonding_debug_root = debugfs_create_dir("bonding", NULL); 82 83 if (IS_ERR(bonding_debug_root)) 84 pr_warn("Warning: Cannot create bonding directory in debugfs\n"); 85 } 86 87 void bond_destroy_debugfs(void) 88 { 89 debugfs_remove_recursive(bonding_debug_root); 90 bonding_debug_root = NULL; 91 } 92 93 94 #else /* !CONFIG_DEBUG_FS */ 95 96 void bond_debug_register(struct bonding *bond) 97 { 98 } 99 100 void bond_debug_unregister(struct bonding *bond) 101 { 102 } 103 104 void bond_debug_reregister(struct bonding *bond) 105 { 106 } 107 108 void __init bond_create_debugfs(void) 109 { 110 } 111 112 void bond_destroy_debugfs(void) 113 { 114 } 115 116 #endif /* CONFIG_DEBUG_FS */ 117