1 #include <linux/kernel.h> 2 #include <linux/module.h> 3 #include <linux/device.h> 4 #include <linux/netdevice.h> 5 6 #include <net/bonding.h> 7 #include <net/bond_alb.h> 8 9 #if defined(CONFIG_DEBUG_FS) && !defined(CONFIG_NET_NS) 10 11 #include <linux/debugfs.h> 12 #include <linux/seq_file.h> 13 14 static struct dentry *bonding_debug_root; 15 16 /* Show RLB hash table */ 17 static int bond_debug_rlb_hash_show(struct seq_file *m, void *v) 18 { 19 struct bonding *bond = m->private; 20 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); 21 struct rlb_client_info *client_info; 22 u32 hash_index; 23 24 if (BOND_MODE(bond) != BOND_MODE_ALB) 25 return 0; 26 27 seq_printf(m, "SourceIP DestinationIP " 28 "Destination MAC DEV\n"); 29 30 spin_lock_bh(&bond->mode_lock); 31 32 hash_index = bond_info->rx_hashtbl_used_head; 33 for (; hash_index != RLB_NULL_INDEX; 34 hash_index = client_info->used_next) { 35 client_info = &(bond_info->rx_hashtbl[hash_index]); 36 seq_printf(m, "%-15pI4 %-15pI4 %-17pM %s\n", 37 &client_info->ip_src, 38 &client_info->ip_dst, 39 &client_info->mac_dst, 40 client_info->slave->dev->name); 41 } 42 43 spin_unlock_bh(&bond->mode_lock); 44 45 return 0; 46 } 47 48 static int bond_debug_rlb_hash_open(struct inode *inode, struct file *file) 49 { 50 return single_open(file, bond_debug_rlb_hash_show, inode->i_private); 51 } 52 53 static const struct file_operations bond_debug_rlb_hash_fops = { 54 .owner = THIS_MODULE, 55 .open = bond_debug_rlb_hash_open, 56 .read = seq_read, 57 .llseek = seq_lseek, 58 .release = single_release, 59 }; 60 61 void bond_debug_register(struct bonding *bond) 62 { 63 if (!bonding_debug_root) 64 return; 65 66 bond->debug_dir = 67 debugfs_create_dir(bond->dev->name, bonding_debug_root); 68 69 if (!bond->debug_dir) { 70 netdev_warn(bond->dev, "failed to register to debugfs\n"); 71 return; 72 } 73 74 debugfs_create_file("rlb_hash_table", 0400, bond->debug_dir, 75 bond, &bond_debug_rlb_hash_fops); 76 } 77 78 void bond_debug_unregister(struct bonding *bond) 79 { 80 if (!bonding_debug_root) 81 return; 82 83 debugfs_remove_recursive(bond->debug_dir); 84 } 85 86 void bond_debug_reregister(struct bonding *bond) 87 { 88 struct dentry *d; 89 90 if (!bonding_debug_root) 91 return; 92 93 d = debugfs_rename(bonding_debug_root, bond->debug_dir, 94 bonding_debug_root, bond->dev->name); 95 if (d) { 96 bond->debug_dir = d; 97 } else { 98 netdev_warn(bond->dev, "failed to reregister, so just unregister old one\n"); 99 bond_debug_unregister(bond); 100 } 101 } 102 103 void bond_create_debugfs(void) 104 { 105 bonding_debug_root = debugfs_create_dir("bonding", NULL); 106 107 if (!bonding_debug_root) { 108 pr_warn("Warning: Cannot create bonding directory in debugfs\n"); 109 } 110 } 111 112 void bond_destroy_debugfs(void) 113 { 114 debugfs_remove_recursive(bonding_debug_root); 115 bonding_debug_root = NULL; 116 } 117 118 119 #else /* !CONFIG_DEBUG_FS */ 120 121 void bond_debug_register(struct bonding *bond) 122 { 123 } 124 125 void bond_debug_unregister(struct bonding *bond) 126 { 127 } 128 129 void bond_debug_reregister(struct bonding *bond) 130 { 131 } 132 133 void bond_create_debugfs(void) 134 { 135 } 136 137 void bond_destroy_debugfs(void) 138 { 139 } 140 141 #endif /* CONFIG_DEBUG_FS */ 142