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 seq_printf(m, "%-15pI4 %-15pI4 %-17pM %s\n", 38 &client_info->ip_src, 39 &client_info->ip_dst, 40 &client_info->mac_dst, 41 client_info->slave->dev->name); 42 } 43 44 spin_unlock_bh(&bond->mode_lock); 45 46 return 0; 47 } 48 DEFINE_SHOW_ATTRIBUTE(bond_debug_rlb_hash); 49 50 void bond_debug_register(struct bonding *bond) 51 { 52 bond->debug_dir = 53 debugfs_create_dir(bond->dev->name, bonding_debug_root); 54 55 debugfs_create_file("rlb_hash_table", 0400, bond->debug_dir, 56 bond, &bond_debug_rlb_hash_fops); 57 } 58 59 void bond_debug_unregister(struct bonding *bond) 60 { 61 debugfs_remove_recursive(bond->debug_dir); 62 } 63 64 void bond_debug_reregister(struct bonding *bond) 65 { 66 struct dentry *d; 67 68 d = debugfs_rename(bonding_debug_root, bond->debug_dir, 69 bonding_debug_root, bond->dev->name); 70 if (!IS_ERR(d)) { 71 bond->debug_dir = d; 72 } else { 73 netdev_warn(bond->dev, "failed to reregister, so just unregister old one\n"); 74 bond_debug_unregister(bond); 75 } 76 } 77 78 void __init bond_create_debugfs(void) 79 { 80 bonding_debug_root = debugfs_create_dir("bonding", NULL); 81 82 if (IS_ERR(bonding_debug_root)) 83 pr_warn("Warning: Cannot create bonding directory in debugfs\n"); 84 } 85 86 void bond_destroy_debugfs(void) 87 { 88 debugfs_remove_recursive(bonding_debug_root); 89 bonding_debug_root = NULL; 90 } 91 92 93 #else /* !CONFIG_DEBUG_FS */ 94 95 void bond_debug_register(struct bonding *bond) 96 { 97 } 98 99 void bond_debug_unregister(struct bonding *bond) 100 { 101 } 102 103 void bond_debug_reregister(struct bonding *bond) 104 { 105 } 106 107 void __init bond_create_debugfs(void) 108 { 109 } 110 111 void bond_destroy_debugfs(void) 112 { 113 } 114 115 #endif /* CONFIG_DEBUG_FS */ 116