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cbe83191d4
Since commitff9fb72bc0("debugfs: return error values, not NULL") changed return value of debugfs_rename() in error cases from %NULL to %ERR_PTR(-ERROR), we should also check error values instead of NULL. Fixes:ff9fb72bc0("debugfs: return error values, not NULL") Signed-off-by: Qi Zheng <zhengqi.arch@bytedance.com> Acked-by: Jay Vosburgh <jay.vosburgh@canonical.com> Link: https://lore.kernel.org/r/20230202093256.32458-1-zhengqi.arch@bytedance.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
125 lines
2.5 KiB
C
125 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/netdevice.h>
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#include <net/bonding.h>
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#include <net/bond_alb.h>
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#if defined(CONFIG_DEBUG_FS) && !defined(CONFIG_NET_NS)
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#include <linux/debugfs.h>
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#include <linux/seq_file.h>
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static struct dentry *bonding_debug_root;
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/* Show RLB hash table */
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static int bond_debug_rlb_hash_show(struct seq_file *m, void *v)
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{
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struct bonding *bond = m->private;
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struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
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struct rlb_client_info *client_info;
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u32 hash_index;
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if (BOND_MODE(bond) != BOND_MODE_ALB)
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return 0;
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seq_printf(m, "SourceIP DestinationIP "
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"Destination MAC DEV\n");
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spin_lock_bh(&bond->mode_lock);
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hash_index = bond_info->rx_hashtbl_used_head;
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for (; hash_index != RLB_NULL_INDEX;
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hash_index = client_info->used_next) {
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client_info = &(bond_info->rx_hashtbl[hash_index]);
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seq_printf(m, "%-15pI4 %-15pI4 %-17pM %s\n",
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&client_info->ip_src,
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&client_info->ip_dst,
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&client_info->mac_dst,
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client_info->slave->dev->name);
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}
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spin_unlock_bh(&bond->mode_lock);
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return 0;
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}
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DEFINE_SHOW_ATTRIBUTE(bond_debug_rlb_hash);
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void bond_debug_register(struct bonding *bond)
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{
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if (!bonding_debug_root)
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return;
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bond->debug_dir =
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debugfs_create_dir(bond->dev->name, bonding_debug_root);
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debugfs_create_file("rlb_hash_table", 0400, bond->debug_dir,
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bond, &bond_debug_rlb_hash_fops);
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}
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void bond_debug_unregister(struct bonding *bond)
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{
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if (!bonding_debug_root)
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return;
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debugfs_remove_recursive(bond->debug_dir);
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}
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void bond_debug_reregister(struct bonding *bond)
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{
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struct dentry *d;
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if (!bonding_debug_root)
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return;
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d = debugfs_rename(bonding_debug_root, bond->debug_dir,
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bonding_debug_root, bond->dev->name);
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if (!IS_ERR(d)) {
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bond->debug_dir = d;
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} else {
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netdev_warn(bond->dev, "failed to reregister, so just unregister old one\n");
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bond_debug_unregister(bond);
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}
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}
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void bond_create_debugfs(void)
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{
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bonding_debug_root = debugfs_create_dir("bonding", NULL);
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if (!bonding_debug_root)
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pr_warn("Warning: Cannot create bonding directory in debugfs\n");
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}
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void bond_destroy_debugfs(void)
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{
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debugfs_remove_recursive(bonding_debug_root);
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bonding_debug_root = NULL;
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}
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#else /* !CONFIG_DEBUG_FS */
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void bond_debug_register(struct bonding *bond)
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{
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}
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void bond_debug_unregister(struct bonding *bond)
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{
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}
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void bond_debug_reregister(struct bonding *bond)
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{
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}
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void bond_create_debugfs(void)
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{
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}
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void bond_destroy_debugfs(void)
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{
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}
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#endif /* CONFIG_DEBUG_FS */
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