![Keiichi KII](/assets/img/avatar_default.png)
This patch avoids a null pointer dereference when we read local_mac for netconsole in configfs and shows default local mac address value. A null pointer dereference occurs when we call show_local_mac() via local_mac entry in configfs before we setup the content of netpoll using netpoll_setup(). Signed-off-by: Keiichi KII <k-keiichi@bx.jp.nec.com> Signed-off-by: David S. Miller <davem@davemloft.net>
814 lines
20 KiB
C
814 lines
20 KiB
C
/*
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* linux/drivers/net/netconsole.c
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*
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* Copyright (C) 2001 Ingo Molnar <mingo@redhat.com>
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*
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* This file contains the implementation of an IRQ-safe, crash-safe
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* kernel console implementation that outputs kernel messages to the
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* network.
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*
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* Modification history:
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*
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* 2001-09-17 started by Ingo Molnar.
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* 2003-08-11 2.6 port by Matt Mackall
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* simplified options
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* generic card hooks
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* works non-modular
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* 2003-09-07 rewritten with netpoll api
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*/
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/****************************************************************
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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****************************************************************/
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#include <linux/mm.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/console.h>
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#include <linux/moduleparam.h>
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#include <linux/string.h>
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#include <linux/netpoll.h>
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#include <linux/inet.h>
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#include <linux/configfs.h>
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MODULE_AUTHOR("Maintainer: Matt Mackall <mpm@selenic.com>");
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MODULE_DESCRIPTION("Console driver for network interfaces");
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MODULE_LICENSE("GPL");
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#define MAX_PARAM_LENGTH 256
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#define MAX_PRINT_CHUNK 1000
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static char config[MAX_PARAM_LENGTH];
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module_param_string(netconsole, config, MAX_PARAM_LENGTH, 0);
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MODULE_PARM_DESC(netconsole, " netconsole=[src-port]@[src-ip]/[dev],[tgt-port]@<tgt-ip>/[tgt-macaddr]\n");
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#ifndef MODULE
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static int __init option_setup(char *opt)
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{
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strlcpy(config, opt, MAX_PARAM_LENGTH);
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return 1;
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}
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__setup("netconsole=", option_setup);
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#endif /* MODULE */
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/* Linked list of all configured targets */
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static LIST_HEAD(target_list);
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/* This needs to be a spinlock because write_msg() cannot sleep */
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static DEFINE_SPINLOCK(target_list_lock);
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/**
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* struct netconsole_target - Represents a configured netconsole target.
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* @list: Links this target into the target_list.
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* @item: Links us into the configfs subsystem hierarchy.
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* @enabled: On / off knob to enable / disable target.
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* Visible from userspace (read-write).
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* We maintain a strict 1:1 correspondence between this and
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* whether the corresponding netpoll is active or inactive.
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* Also, other parameters of a target may be modified at
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* runtime only when it is disabled (enabled == 0).
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* @np: The netpoll structure for this target.
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* Contains the other userspace visible parameters:
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* dev_name (read-write)
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* local_port (read-write)
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* remote_port (read-write)
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* local_ip (read-write)
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* remote_ip (read-write)
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* local_mac (read-only)
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* remote_mac (read-write)
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*/
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struct netconsole_target {
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struct list_head list;
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#ifdef CONFIG_NETCONSOLE_DYNAMIC
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struct config_item item;
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#endif
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int enabled;
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struct netpoll np;
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};
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#ifdef CONFIG_NETCONSOLE_DYNAMIC
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static struct configfs_subsystem netconsole_subsys;
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static int __init dynamic_netconsole_init(void)
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{
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config_group_init(&netconsole_subsys.su_group);
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mutex_init(&netconsole_subsys.su_mutex);
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return configfs_register_subsystem(&netconsole_subsys);
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}
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static void __exit dynamic_netconsole_exit(void)
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{
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configfs_unregister_subsystem(&netconsole_subsys);
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}
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/*
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* Targets that were created by parsing the boot/module option string
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* do not exist in the configfs hierarchy (and have NULL names) and will
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* never go away, so make these a no-op for them.
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*/
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static void netconsole_target_get(struct netconsole_target *nt)
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{
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if (config_item_name(&nt->item))
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config_item_get(&nt->item);
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}
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static void netconsole_target_put(struct netconsole_target *nt)
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{
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if (config_item_name(&nt->item))
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config_item_put(&nt->item);
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}
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#else /* !CONFIG_NETCONSOLE_DYNAMIC */
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static int __init dynamic_netconsole_init(void)
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{
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return 0;
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}
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static void __exit dynamic_netconsole_exit(void)
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{
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}
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/*
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* No danger of targets going away from under us when dynamic
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* reconfigurability is off.
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*/
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static void netconsole_target_get(struct netconsole_target *nt)
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{
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}
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static void netconsole_target_put(struct netconsole_target *nt)
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{
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}
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#endif /* CONFIG_NETCONSOLE_DYNAMIC */
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/* Allocate new target (from boot/module param) and setup netpoll for it */
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static struct netconsole_target *alloc_param_target(char *target_config)
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{
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int err = -ENOMEM;
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struct netconsole_target *nt;
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/*
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* Allocate and initialize with defaults.
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* Note that these targets get their config_item fields zeroed-out.
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*/
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nt = kzalloc(sizeof(*nt), GFP_KERNEL);
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if (!nt) {
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printk(KERN_ERR "netconsole: failed to allocate memory\n");
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goto fail;
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}
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nt->np.name = "netconsole";
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strlcpy(nt->np.dev_name, "eth0", IFNAMSIZ);
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nt->np.local_port = 6665;
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nt->np.remote_port = 6666;
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memset(nt->np.remote_mac, 0xff, ETH_ALEN);
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/* Parse parameters and setup netpoll */
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err = netpoll_parse_options(&nt->np, target_config);
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if (err)
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goto fail;
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err = netpoll_setup(&nt->np);
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if (err)
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goto fail;
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nt->enabled = 1;
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return nt;
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fail:
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kfree(nt);
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return ERR_PTR(err);
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}
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/* Cleanup netpoll for given target (from boot/module param) and free it */
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static void free_param_target(struct netconsole_target *nt)
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{
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netpoll_cleanup(&nt->np);
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kfree(nt);
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}
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#ifdef CONFIG_NETCONSOLE_DYNAMIC
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/*
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* Our subsystem hierarchy is:
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*
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* /sys/kernel/config/netconsole/
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* |
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* <target>/
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* | enabled
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* | dev_name
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* | local_port
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* | remote_port
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* | local_ip
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* | remote_ip
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* | local_mac
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* | remote_mac
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* |
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* <target>/...
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*/
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struct netconsole_target_attr {
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struct configfs_attribute attr;
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ssize_t (*show)(struct netconsole_target *nt,
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char *buf);
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ssize_t (*store)(struct netconsole_target *nt,
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const char *buf,
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size_t count);
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};
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static struct netconsole_target *to_target(struct config_item *item)
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{
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return item ?
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container_of(item, struct netconsole_target, item) :
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NULL;
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}
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/*
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* Wrapper over simple_strtol (base 10) with sanity and range checking.
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* We return (signed) long only because we may want to return errors.
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* Do not use this to convert numbers that are allowed to be negative.
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*/
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static long strtol10_check_range(const char *cp, long min, long max)
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{
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long ret;
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char *p = (char *) cp;
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WARN_ON(min < 0);
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WARN_ON(max < min);
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ret = simple_strtol(p, &p, 10);
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if (*p && (*p != '\n')) {
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printk(KERN_ERR "netconsole: invalid input\n");
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return -EINVAL;
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}
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if ((ret < min) || (ret > max)) {
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printk(KERN_ERR "netconsole: input %ld must be between "
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"%ld and %ld\n", ret, min, max);
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return -EINVAL;
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}
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return ret;
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}
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/*
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* Attribute operations for netconsole_target.
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*/
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static ssize_t show_enabled(struct netconsole_target *nt, char *buf)
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{
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return snprintf(buf, PAGE_SIZE, "%d\n", nt->enabled);
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}
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static ssize_t show_dev_name(struct netconsole_target *nt, char *buf)
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{
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return snprintf(buf, PAGE_SIZE, "%s\n", nt->np.dev_name);
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}
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static ssize_t show_local_port(struct netconsole_target *nt, char *buf)
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{
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return snprintf(buf, PAGE_SIZE, "%d\n", nt->np.local_port);
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}
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static ssize_t show_remote_port(struct netconsole_target *nt, char *buf)
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{
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return snprintf(buf, PAGE_SIZE, "%d\n", nt->np.remote_port);
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}
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static ssize_t show_local_ip(struct netconsole_target *nt, char *buf)
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{
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return snprintf(buf, PAGE_SIZE, "%d.%d.%d.%d\n",
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HIPQUAD(nt->np.local_ip));
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}
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static ssize_t show_remote_ip(struct netconsole_target *nt, char *buf)
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{
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return snprintf(buf, PAGE_SIZE, "%d.%d.%d.%d\n",
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HIPQUAD(nt->np.remote_ip));
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}
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static ssize_t show_local_mac(struct netconsole_target *nt, char *buf)
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{
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struct net_device *dev = nt->np.dev;
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DECLARE_MAC_BUF(mac);
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return snprintf(buf, PAGE_SIZE, "%s\n", dev ?
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print_mac(mac, dev->dev_addr) : "ff:ff:ff:ff:ff:ff");
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}
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static ssize_t show_remote_mac(struct netconsole_target *nt, char *buf)
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{
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DECLARE_MAC_BUF(mac);
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return snprintf(buf, PAGE_SIZE, "%s\n",
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print_mac(mac, nt->np.remote_mac));
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}
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/*
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* This one is special -- targets created through the configfs interface
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* are not enabled (and the corresponding netpoll activated) by default.
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* The user is expected to set the desired parameters first (which
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* would enable him to dynamically add new netpoll targets for new
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* network interfaces as and when they come up).
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*/
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static ssize_t store_enabled(struct netconsole_target *nt,
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const char *buf,
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size_t count)
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{
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int err;
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long enabled;
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enabled = strtol10_check_range(buf, 0, 1);
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if (enabled < 0)
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return enabled;
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if (enabled) { /* 1 */
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/*
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* Skip netpoll_parse_options() -- all the attributes are
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* already configured via configfs. Just print them out.
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*/
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netpoll_print_options(&nt->np);
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err = netpoll_setup(&nt->np);
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if (err)
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return err;
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printk(KERN_INFO "netconsole: network logging started\n");
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} else { /* 0 */
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netpoll_cleanup(&nt->np);
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}
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nt->enabled = enabled;
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return strnlen(buf, count);
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}
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static ssize_t store_dev_name(struct netconsole_target *nt,
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const char *buf,
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size_t count)
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{
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size_t len;
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if (nt->enabled) {
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printk(KERN_ERR "netconsole: target (%s) is enabled, "
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"disable to update parameters\n",
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config_item_name(&nt->item));
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return -EINVAL;
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}
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strlcpy(nt->np.dev_name, buf, IFNAMSIZ);
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/* Get rid of possible trailing newline from echo(1) */
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len = strnlen(nt->np.dev_name, IFNAMSIZ);
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if (nt->np.dev_name[len - 1] == '\n')
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nt->np.dev_name[len - 1] = '\0';
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return strnlen(buf, count);
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}
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static ssize_t store_local_port(struct netconsole_target *nt,
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const char *buf,
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size_t count)
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{
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long local_port;
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#define __U16_MAX ((__u16) ~0U)
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if (nt->enabled) {
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printk(KERN_ERR "netconsole: target (%s) is enabled, "
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"disable to update parameters\n",
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config_item_name(&nt->item));
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return -EINVAL;
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}
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local_port = strtol10_check_range(buf, 0, __U16_MAX);
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if (local_port < 0)
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return local_port;
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nt->np.local_port = local_port;
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return strnlen(buf, count);
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}
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static ssize_t store_remote_port(struct netconsole_target *nt,
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const char *buf,
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size_t count)
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{
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long remote_port;
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#define __U16_MAX ((__u16) ~0U)
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if (nt->enabled) {
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printk(KERN_ERR "netconsole: target (%s) is enabled, "
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"disable to update parameters\n",
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config_item_name(&nt->item));
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return -EINVAL;
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}
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remote_port = strtol10_check_range(buf, 0, __U16_MAX);
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if (remote_port < 0)
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return remote_port;
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nt->np.remote_port = remote_port;
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return strnlen(buf, count);
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}
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static ssize_t store_local_ip(struct netconsole_target *nt,
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const char *buf,
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size_t count)
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{
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if (nt->enabled) {
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printk(KERN_ERR "netconsole: target (%s) is enabled, "
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"disable to update parameters\n",
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config_item_name(&nt->item));
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return -EINVAL;
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}
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nt->np.local_ip = ntohl(in_aton(buf));
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return strnlen(buf, count);
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}
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static ssize_t store_remote_ip(struct netconsole_target *nt,
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const char *buf,
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size_t count)
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{
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if (nt->enabled) {
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printk(KERN_ERR "netconsole: target (%s) is enabled, "
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"disable to update parameters\n",
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config_item_name(&nt->item));
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return -EINVAL;
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}
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nt->np.remote_ip = ntohl(in_aton(buf));
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return strnlen(buf, count);
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}
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static ssize_t store_remote_mac(struct netconsole_target *nt,
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const char *buf,
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size_t count)
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{
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u8 remote_mac[ETH_ALEN];
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char *p = (char *) buf;
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int i;
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if (nt->enabled) {
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printk(KERN_ERR "netconsole: target (%s) is enabled, "
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"disable to update parameters\n",
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config_item_name(&nt->item));
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return -EINVAL;
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}
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for (i = 0; i < ETH_ALEN - 1; i++) {
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remote_mac[i] = simple_strtoul(p, &p, 16);
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if (*p != ':')
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goto invalid;
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p++;
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}
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remote_mac[ETH_ALEN - 1] = simple_strtoul(p, &p, 16);
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if (*p && (*p != '\n'))
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goto invalid;
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memcpy(nt->np.remote_mac, remote_mac, ETH_ALEN);
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return strnlen(buf, count);
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invalid:
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printk(KERN_ERR "netconsole: invalid input\n");
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return -EINVAL;
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}
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/*
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* Attribute definitions for netconsole_target.
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*/
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#define NETCONSOLE_TARGET_ATTR_RO(_name) \
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static struct netconsole_target_attr netconsole_target_##_name = \
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__CONFIGFS_ATTR(_name, S_IRUGO, show_##_name, NULL)
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#define NETCONSOLE_TARGET_ATTR_RW(_name) \
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static struct netconsole_target_attr netconsole_target_##_name = \
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__CONFIGFS_ATTR(_name, S_IRUGO | S_IWUSR, show_##_name, store_##_name)
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NETCONSOLE_TARGET_ATTR_RW(enabled);
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NETCONSOLE_TARGET_ATTR_RW(dev_name);
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NETCONSOLE_TARGET_ATTR_RW(local_port);
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NETCONSOLE_TARGET_ATTR_RW(remote_port);
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NETCONSOLE_TARGET_ATTR_RW(local_ip);
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NETCONSOLE_TARGET_ATTR_RW(remote_ip);
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NETCONSOLE_TARGET_ATTR_RO(local_mac);
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NETCONSOLE_TARGET_ATTR_RW(remote_mac);
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static struct configfs_attribute *netconsole_target_attrs[] = {
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&netconsole_target_enabled.attr,
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&netconsole_target_dev_name.attr,
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&netconsole_target_local_port.attr,
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&netconsole_target_remote_port.attr,
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&netconsole_target_local_ip.attr,
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&netconsole_target_remote_ip.attr,
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&netconsole_target_local_mac.attr,
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&netconsole_target_remote_mac.attr,
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NULL,
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};
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/*
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* Item operations and type for netconsole_target.
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*/
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static void netconsole_target_release(struct config_item *item)
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|
{
|
|
kfree(to_target(item));
|
|
}
|
|
|
|
static ssize_t netconsole_target_attr_show(struct config_item *item,
|
|
struct configfs_attribute *attr,
|
|
char *buf)
|
|
{
|
|
ssize_t ret = -EINVAL;
|
|
struct netconsole_target *nt = to_target(item);
|
|
struct netconsole_target_attr *na =
|
|
container_of(attr, struct netconsole_target_attr, attr);
|
|
|
|
if (na->show)
|
|
ret = na->show(nt, buf);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static ssize_t netconsole_target_attr_store(struct config_item *item,
|
|
struct configfs_attribute *attr,
|
|
const char *buf,
|
|
size_t count)
|
|
{
|
|
ssize_t ret = -EINVAL;
|
|
struct netconsole_target *nt = to_target(item);
|
|
struct netconsole_target_attr *na =
|
|
container_of(attr, struct netconsole_target_attr, attr);
|
|
|
|
if (na->store)
|
|
ret = na->store(nt, buf, count);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static struct configfs_item_operations netconsole_target_item_ops = {
|
|
.release = netconsole_target_release,
|
|
.show_attribute = netconsole_target_attr_show,
|
|
.store_attribute = netconsole_target_attr_store,
|
|
};
|
|
|
|
static struct config_item_type netconsole_target_type = {
|
|
.ct_attrs = netconsole_target_attrs,
|
|
.ct_item_ops = &netconsole_target_item_ops,
|
|
.ct_owner = THIS_MODULE,
|
|
};
|
|
|
|
/*
|
|
* Group operations and type for netconsole_subsys.
|
|
*/
|
|
|
|
static struct config_item *make_netconsole_target(struct config_group *group,
|
|
const char *name)
|
|
{
|
|
unsigned long flags;
|
|
struct netconsole_target *nt;
|
|
|
|
/*
|
|
* Allocate and initialize with defaults.
|
|
* Target is disabled at creation (enabled == 0).
|
|
*/
|
|
nt = kzalloc(sizeof(*nt), GFP_KERNEL);
|
|
if (!nt) {
|
|
printk(KERN_ERR "netconsole: failed to allocate memory\n");
|
|
return NULL;
|
|
}
|
|
|
|
nt->np.name = "netconsole";
|
|
strlcpy(nt->np.dev_name, "eth0", IFNAMSIZ);
|
|
nt->np.local_port = 6665;
|
|
nt->np.remote_port = 6666;
|
|
memset(nt->np.remote_mac, 0xff, ETH_ALEN);
|
|
|
|
/* Initialize the config_item member */
|
|
config_item_init_type_name(&nt->item, name, &netconsole_target_type);
|
|
|
|
/* Adding, but it is disabled */
|
|
spin_lock_irqsave(&target_list_lock, flags);
|
|
list_add(&nt->list, &target_list);
|
|
spin_unlock_irqrestore(&target_list_lock, flags);
|
|
|
|
return &nt->item;
|
|
}
|
|
|
|
static void drop_netconsole_target(struct config_group *group,
|
|
struct config_item *item)
|
|
{
|
|
unsigned long flags;
|
|
struct netconsole_target *nt = to_target(item);
|
|
|
|
spin_lock_irqsave(&target_list_lock, flags);
|
|
list_del(&nt->list);
|
|
spin_unlock_irqrestore(&target_list_lock, flags);
|
|
|
|
/*
|
|
* The target may have never been enabled, or was manually disabled
|
|
* before being removed so netpoll may have already been cleaned up.
|
|
*/
|
|
if (nt->enabled)
|
|
netpoll_cleanup(&nt->np);
|
|
|
|
config_item_put(&nt->item);
|
|
}
|
|
|
|
static struct configfs_group_operations netconsole_subsys_group_ops = {
|
|
.make_item = make_netconsole_target,
|
|
.drop_item = drop_netconsole_target,
|
|
};
|
|
|
|
static struct config_item_type netconsole_subsys_type = {
|
|
.ct_group_ops = &netconsole_subsys_group_ops,
|
|
.ct_owner = THIS_MODULE,
|
|
};
|
|
|
|
/* The netconsole configfs subsystem */
|
|
static struct configfs_subsystem netconsole_subsys = {
|
|
.su_group = {
|
|
.cg_item = {
|
|
.ci_namebuf = "netconsole",
|
|
.ci_type = &netconsole_subsys_type,
|
|
},
|
|
},
|
|
};
|
|
|
|
#endif /* CONFIG_NETCONSOLE_DYNAMIC */
|
|
|
|
/* Handle network interface device notifications */
|
|
static int netconsole_netdev_event(struct notifier_block *this,
|
|
unsigned long event,
|
|
void *ptr)
|
|
{
|
|
unsigned long flags;
|
|
struct netconsole_target *nt;
|
|
struct net_device *dev = ptr;
|
|
|
|
if (!(event == NETDEV_CHANGENAME))
|
|
goto done;
|
|
|
|
spin_lock_irqsave(&target_list_lock, flags);
|
|
list_for_each_entry(nt, &target_list, list) {
|
|
netconsole_target_get(nt);
|
|
if (nt->np.dev == dev) {
|
|
switch (event) {
|
|
case NETDEV_CHANGENAME:
|
|
strlcpy(nt->np.dev_name, dev->name, IFNAMSIZ);
|
|
break;
|
|
}
|
|
}
|
|
netconsole_target_put(nt);
|
|
}
|
|
spin_unlock_irqrestore(&target_list_lock, flags);
|
|
|
|
done:
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
static struct notifier_block netconsole_netdev_notifier = {
|
|
.notifier_call = netconsole_netdev_event,
|
|
};
|
|
|
|
static void write_msg(struct console *con, const char *msg, unsigned int len)
|
|
{
|
|
int frag, left;
|
|
unsigned long flags;
|
|
struct netconsole_target *nt;
|
|
const char *tmp;
|
|
|
|
/* Avoid taking lock and disabling interrupts unnecessarily */
|
|
if (list_empty(&target_list))
|
|
return;
|
|
|
|
spin_lock_irqsave(&target_list_lock, flags);
|
|
list_for_each_entry(nt, &target_list, list) {
|
|
netconsole_target_get(nt);
|
|
if (nt->enabled && netif_running(nt->np.dev)) {
|
|
/*
|
|
* We nest this inside the for-each-target loop above
|
|
* so that we're able to get as much logging out to
|
|
* at least one target if we die inside here, instead
|
|
* of unnecessarily keeping all targets in lock-step.
|
|
*/
|
|
tmp = msg;
|
|
for (left = len; left;) {
|
|
frag = min(left, MAX_PRINT_CHUNK);
|
|
netpoll_send_udp(&nt->np, tmp, frag);
|
|
tmp += frag;
|
|
left -= frag;
|
|
}
|
|
}
|
|
netconsole_target_put(nt);
|
|
}
|
|
spin_unlock_irqrestore(&target_list_lock, flags);
|
|
}
|
|
|
|
static struct console netconsole = {
|
|
.name = "netcon",
|
|
.flags = CON_ENABLED | CON_PRINTBUFFER,
|
|
.write = write_msg,
|
|
};
|
|
|
|
static int __init init_netconsole(void)
|
|
{
|
|
int err;
|
|
struct netconsole_target *nt, *tmp;
|
|
unsigned long flags;
|
|
char *target_config;
|
|
char *input = config;
|
|
|
|
if (strnlen(input, MAX_PARAM_LENGTH)) {
|
|
while ((target_config = strsep(&input, ";"))) {
|
|
nt = alloc_param_target(target_config);
|
|
if (IS_ERR(nt)) {
|
|
err = PTR_ERR(nt);
|
|
goto fail;
|
|
}
|
|
spin_lock_irqsave(&target_list_lock, flags);
|
|
list_add(&nt->list, &target_list);
|
|
spin_unlock_irqrestore(&target_list_lock, flags);
|
|
}
|
|
}
|
|
|
|
err = register_netdevice_notifier(&netconsole_netdev_notifier);
|
|
if (err)
|
|
goto fail;
|
|
|
|
err = dynamic_netconsole_init();
|
|
if (err)
|
|
goto undonotifier;
|
|
|
|
register_console(&netconsole);
|
|
printk(KERN_INFO "netconsole: network logging started\n");
|
|
|
|
return err;
|
|
|
|
undonotifier:
|
|
unregister_netdevice_notifier(&netconsole_netdev_notifier);
|
|
|
|
fail:
|
|
printk(KERN_ERR "netconsole: cleaning up\n");
|
|
|
|
/*
|
|
* Remove all targets and destroy them (only targets created
|
|
* from the boot/module option exist here). Skipping the list
|
|
* lock is safe here, and netpoll_cleanup() will sleep.
|
|
*/
|
|
list_for_each_entry_safe(nt, tmp, &target_list, list) {
|
|
list_del(&nt->list);
|
|
free_param_target(nt);
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static void __exit cleanup_netconsole(void)
|
|
{
|
|
struct netconsole_target *nt, *tmp;
|
|
|
|
unregister_console(&netconsole);
|
|
dynamic_netconsole_exit();
|
|
unregister_netdevice_notifier(&netconsole_netdev_notifier);
|
|
|
|
/*
|
|
* Targets created via configfs pin references on our module
|
|
* and would first be rmdir(2)'ed from userspace. We reach
|
|
* here only when they are already destroyed, and only those
|
|
* created from the boot/module option are left, so remove and
|
|
* destroy them. Skipping the list lock is safe here, and
|
|
* netpoll_cleanup() will sleep.
|
|
*/
|
|
list_for_each_entry_safe(nt, tmp, &target_list, list) {
|
|
list_del(&nt->list);
|
|
free_param_target(nt);
|
|
}
|
|
}
|
|
|
|
module_init(init_netconsole);
|
|
module_exit(cleanup_netconsole);
|