1 #include <linux/kernel.h> 2 #include <linux/module.h> 3 #include <linux/device.h> 4 #include <linux/netdevice.h> 5 6 #include "bonding.h" 7 #include "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 /* 17 * Show RLB hash table 18 */ 19 static int bond_debug_rlb_hash_show(struct seq_file *m, void *v) 20 { 21 struct bonding *bond = m->private; 22 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); 23 struct rlb_client_info *client_info; 24 u32 hash_index; 25 26 if (bond->params.mode != BOND_MODE_ALB) 27 return 0; 28 29 seq_printf(m, "SourceIP DestinationIP " 30 "Destination MAC DEV\n"); 31 32 spin_lock_bh(&(BOND_ALB_INFO(bond).rx_hashtbl_lock)); 33 34 hash_index = bond_info->rx_hashtbl_head; 35 for (; hash_index != RLB_NULL_INDEX; hash_index = client_info->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_ALB_INFO(bond).rx_hashtbl_lock)); 45 46 return 0; 47 } 48 49 static int bond_debug_rlb_hash_open(struct inode *inode, struct file *file) 50 { 51 return single_open(file, bond_debug_rlb_hash_show, inode->i_private); 52 } 53 54 static const struct file_operations bond_debug_rlb_hash_fops = { 55 .owner = THIS_MODULE, 56 .open = bond_debug_rlb_hash_open, 57 .read = seq_read, 58 .llseek = seq_lseek, 59 .release = single_release, 60 }; 61 62 void bond_debug_register(struct bonding *bond) 63 { 64 if (!bonding_debug_root) 65 return; 66 67 bond->debug_dir = 68 debugfs_create_dir(bond->dev->name, bonding_debug_root); 69 70 if (!bond->debug_dir) { 71 pr_warning("%s: Warning: failed to register to debugfs\n", 72 bond->dev->name); 73 return; 74 } 75 76 debugfs_create_file("rlb_hash_table", 0400, bond->debug_dir, 77 bond, &bond_debug_rlb_hash_fops); 78 } 79 80 void bond_debug_unregister(struct bonding *bond) 81 { 82 if (!bonding_debug_root) 83 return; 84 85 debugfs_remove_recursive(bond->debug_dir); 86 } 87 88 void bond_debug_reregister(struct bonding *bond) 89 { 90 struct dentry *d; 91 92 if (!bonding_debug_root) 93 return; 94 95 d = debugfs_rename(bonding_debug_root, bond->debug_dir, 96 bonding_debug_root, bond->dev->name); 97 if (d) { 98 bond->debug_dir = d; 99 } else { 100 pr_warning("%s: Warning: failed to reregister, " 101 "so just unregister old one\n", 102 bond->dev->name); 103 bond_debug_unregister(bond); 104 } 105 } 106 107 void bond_create_debugfs(void) 108 { 109 bonding_debug_root = debugfs_create_dir("bonding", NULL); 110 111 if (!bonding_debug_root) { 112 pr_warning("Warning: Cannot create bonding directory" 113 " in debugfs\n"); 114 } 115 } 116 117 void bond_destroy_debugfs(void) 118 { 119 debugfs_remove_recursive(bonding_debug_root); 120 bonding_debug_root = NULL; 121 } 122 123 124 #else /* !CONFIG_DEBUG_FS */ 125 126 void bond_debug_register(struct bonding *bond) 127 { 128 } 129 130 void bond_debug_unregister(struct bonding *bond) 131 { 132 } 133 134 void bond_debug_reregister(struct bonding *bond) 135 { 136 } 137 138 void bond_create_debugfs(void) 139 { 140 } 141 142 void bond_destroy_debugfs(void) 143 { 144 } 145 146 #endif /* CONFIG_DEBUG_FS */ 147