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 if (!bonding_debug_root) 53 return; 54 55 bond->debug_dir = 56 debugfs_create_dir(bond->dev->name, bonding_debug_root); 57 58 debugfs_create_file("rlb_hash_table", 0400, bond->debug_dir, 59 bond, &bond_debug_rlb_hash_fops); 60 } 61 62 void bond_debug_unregister(struct bonding *bond) 63 { 64 if (!bonding_debug_root) 65 return; 66 67 debugfs_remove_recursive(bond->debug_dir); 68 } 69 70 void bond_debug_reregister(struct bonding *bond) 71 { 72 struct dentry *d; 73 74 if (!bonding_debug_root) 75 return; 76 77 d = debugfs_rename(bonding_debug_root, bond->debug_dir, 78 bonding_debug_root, bond->dev->name); 79 if (d) { 80 bond->debug_dir = d; 81 } else { 82 netdev_warn(bond->dev, "failed to reregister, so just unregister old one\n"); 83 bond_debug_unregister(bond); 84 } 85 } 86 87 void bond_create_debugfs(void) 88 { 89 bonding_debug_root = debugfs_create_dir("bonding", NULL); 90 91 if (!bonding_debug_root) { 92 pr_warn("Warning: Cannot create bonding directory in debugfs\n"); 93 } 94 } 95 96 void bond_destroy_debugfs(void) 97 { 98 debugfs_remove_recursive(bonding_debug_root); 99 bonding_debug_root = NULL; 100 } 101 102 103 #else /* !CONFIG_DEBUG_FS */ 104 105 void bond_debug_register(struct bonding *bond) 106 { 107 } 108 109 void bond_debug_unregister(struct bonding *bond) 110 { 111 } 112 113 void bond_debug_reregister(struct bonding *bond) 114 { 115 } 116 117 void bond_create_debugfs(void) 118 { 119 } 120 121 void bond_destroy_debugfs(void) 122 { 123 } 124 125 #endif /* CONFIG_DEBUG_FS */ 126