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/drivers/net/bonding/bond_debugfs.c

https://bitbucket.org/ndreys/linux-sunxi
C | 146 lines | 110 code | 33 blank | 3 comment | 11 complexity | 49c4faaca30b7b6a4b1b2642ff8047e5 MD5 | raw file
Possible License(s): GPL-2.0, LGPL-2.0, AGPL-1.0
  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#ifdef CONFIG_DEBUG_FS
 10
 11#include <linux/debugfs.h>
 12#include <linux/seq_file.h>
 13
 14static struct dentry *bonding_debug_root;
 15
 16/*
 17 *  Show RLB hash table
 18 */
 19static 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
 49static 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
 54static 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
 62void 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
 80void bond_debug_unregister(struct bonding *bond)
 81{
 82	if (!bonding_debug_root)
 83		return;
 84
 85	debugfs_remove_recursive(bond->debug_dir);
 86}
 87
 88void 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
107void 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
117void 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
126void bond_debug_register(struct bonding *bond)
127{
128}
129
130void bond_debug_unregister(struct bonding *bond)
131{
132}
133
134void bond_debug_reregister(struct bonding *bond)
135{
136}
137
138void bond_create_debugfs(void)
139{
140}
141
142void bond_destroy_debugfs(void)
143{
144}
145
146#endif /* CONFIG_DEBUG_FS */