bond_sysfs.c 44.5 KB
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/*
 * Copyright(c) 2004-2005 Intel Corporation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * The full GNU General Public License is included in this distribution in the
 * file called LICENSE.
 *
 */
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

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#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/device.h>
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#include <linux/sched.h>
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#include <linux/fs.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/netdevice.h>
#include <linux/inetdevice.h>
#include <linux/in.h>
#include <linux/sysfs.h>
#include <linux/ctype.h>
#include <linux/inet.h>
#include <linux/rtnetlink.h>
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#include <linux/etherdevice.h>
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#include <net/net_namespace.h>
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#include <net/netns/generic.h>
#include <linux/nsproxy.h>
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#include "bonding.h"
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#define to_dev(obj)	container_of(obj, struct device, kobj)
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#define to_bond(cd)	((struct bonding *)(netdev_priv(to_net_dev(cd))))
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/*
 * "show" function for the bond_masters attribute.
 * The class parameter is ignored.
 */
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static ssize_t bonding_show_bonds(struct class *cls,
				  struct class_attribute *attr,
				  char *buf)
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{
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	struct bond_net *bn =
		container_of(attr, struct bond_net, class_attr_bonding_masters);
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	int res = 0;
	struct bonding *bond;

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	rtnl_lock();
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64
	list_for_each_entry(bond, &bn->dev_list, bond_list) {
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		if (res > (PAGE_SIZE - IFNAMSIZ)) {
			/* not enough space for another interface name */
			if ((PAGE_SIZE - res) > 10)
				res = PAGE_SIZE - 10;
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			res += sprintf(buf + res, "++more++ ");
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			break;
		}
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		res += sprintf(buf + res, "%s ", bond->dev->name);
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	}
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	if (res)
		buf[res-1] = '\n'; /* eat the leftover space */
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	rtnl_unlock();
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	return res;
}

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static struct net_device *bond_get_by_name(struct bond_net *bn, const char *ifname)
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{
	struct bonding *bond;

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	list_for_each_entry(bond, &bn->dev_list, bond_list) {
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		if (strncmp(bond->dev->name, ifname, IFNAMSIZ) == 0)
			return bond->dev;
	}
	return NULL;
}

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/*
 * "store" function for the bond_masters attribute.  This is what
 * creates and deletes entire bonds.
 *
 * The class parameter is ignored.
 *
 */

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static ssize_t bonding_store_bonds(struct class *cls,
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				   struct class_attribute *attr,
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				   const char *buffer, size_t count)
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{
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	struct bond_net *bn =
		container_of(attr, struct bond_net, class_attr_bonding_masters);
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	char command[IFNAMSIZ + 1] = {0, };
	char *ifname;
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	int rv, res = count;
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	sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
	ifname = command + 1;
	if ((strlen(command) <= 1) ||
	    !dev_valid_name(ifname))
		goto err_no_cmd;

	if (command[0] == '+') {
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		pr_info("%s is being created...\n", ifname);
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		rv = bond_create(bn->net, ifname);
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		if (rv) {
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			if (rv == -EEXIST)
				pr_info("%s already exists.\n", ifname);
			else
				pr_info("%s creation failed.\n", ifname);
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			res = rv;
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		}
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	} else if (command[0] == '-') {
		struct net_device *bond_dev;
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		rtnl_lock();
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		bond_dev = bond_get_by_name(bn, ifname);
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		if (bond_dev) {
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			pr_info("%s is being deleted...\n", ifname);
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			unregister_netdevice(bond_dev);
		} else {
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			pr_err("unable to delete non-existent %s\n", ifname);
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			res = -ENODEV;
		}
		rtnl_unlock();
	} else
		goto err_no_cmd;
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	/* Always return either count or an error.  If you return 0, you'll
	 * get called forever, which is bad.
	 */
	return res;
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err_no_cmd:
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	pr_err("no command found in bonding_masters. Use +ifname or -ifname.\n");
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	return -EPERM;
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}
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static const void *bonding_namespace(struct class *cls,
				     const struct class_attribute *attr)
{
	const struct bond_net *bn =
		container_of(attr, struct bond_net, class_attr_bonding_masters);
	return bn->net;
}

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/* class attribute for bond_masters file.  This ends up in /sys/class/net */
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static const struct class_attribute class_attr_bonding_masters = {
	.attr = {
		.name = "bonding_masters",
		.mode = S_IWUSR | S_IRUGO,
	},
	.show = bonding_show_bonds,
	.store = bonding_store_bonds,
	.namespace = bonding_namespace,
};
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int bond_create_slave_symlinks(struct net_device *master,
			       struct net_device *slave)
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{
	char linkname[IFNAMSIZ+7];
	int ret = 0;

	/* first, create a link from the slave back to the master */
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	ret = sysfs_create_link(&(slave->dev.kobj), &(master->dev.kobj),
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				"master");
	if (ret)
		return ret;
	/* next, create a link from the master to the slave */
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	sprintf(linkname, "slave_%s", slave->name);
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	ret = sysfs_create_link(&(master->dev.kobj), &(slave->dev.kobj),
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				linkname);
	return ret;

}

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void bond_destroy_slave_symlinks(struct net_device *master,
				 struct net_device *slave)
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{
	char linkname[IFNAMSIZ+7];

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	sysfs_remove_link(&(slave->dev.kobj), "master");
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	sprintf(linkname, "slave_%s", slave->name);
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	sysfs_remove_link(&(master->dev.kobj), linkname);
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}


/*
 * Show the slaves in the current bond.
 */
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static ssize_t bonding_show_slaves(struct device *d,
				   struct device_attribute *attr, char *buf)
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{
	struct slave *slave;
	int i, res = 0;
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	struct bonding *bond = to_bond(d);
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	read_lock(&bond->lock);
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	bond_for_each_slave(bond, slave, i) {
		if (res > (PAGE_SIZE - IFNAMSIZ)) {
			/* not enough space for another interface name */
			if ((PAGE_SIZE - res) > 10)
				res = PAGE_SIZE - 10;
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			res += sprintf(buf + res, "++more++ ");
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			break;
		}
		res += sprintf(buf + res, "%s ", slave->dev->name);
	}
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	read_unlock(&bond->lock);
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	if (res)
		buf[res-1] = '\n'; /* eat the leftover space */
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	return res;
}

/*
 * Set the slaves in the current bond.  The bond interface must be
 * up for this to succeed.
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 * This is supposed to be only thin wrapper for bond_enslave and bond_release.
 * All hard work should be done there.
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 */
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static ssize_t bonding_store_slaves(struct device *d,
				    struct device_attribute *attr,
				    const char *buffer, size_t count)
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{
	char command[IFNAMSIZ + 1] = { 0, };
	char *ifname;
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	int res, ret = count;
	struct net_device *dev;
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	struct bonding *bond = to_bond(d);
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	if (!rtnl_trylock())
		return restart_syscall();
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	sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
	ifname = command + 1;
	if ((strlen(command) <= 1) ||
	    !dev_valid_name(ifname))
		goto err_no_cmd;

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	dev = __dev_get_by_name(dev_net(bond->dev), ifname);
	if (!dev) {
		pr_info("%s: Interface %s does not exist!\n",
			bond->dev->name, ifname);
		ret = -ENODEV;
		goto out;
	}
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	switch (command[0]) {
	case '+':
		pr_info("%s: Adding slave %s.\n", bond->dev->name, dev->name);
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		res = bond_enslave(bond->dev, dev);
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		break;
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	case '-':
		pr_info("%s: Removing slave %s.\n", bond->dev->name, dev->name);
		res = bond_release(bond->dev, dev);
		break;
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	default:
		goto err_no_cmd;
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	}

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	if (res)
		ret = res;
	goto out;

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err_no_cmd:
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	pr_err("no command found in slaves file for bond %s. Use +ifname or -ifname.\n",
	       bond->dev->name);
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	ret = -EPERM;

out:
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	rtnl_unlock();
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	return ret;
}

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static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves,
		   bonding_store_slaves);
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/*
 * Show and set the bonding mode.  The bond interface must be down to
 * change the mode.
 */
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static ssize_t bonding_show_mode(struct device *d,
				 struct device_attribute *attr, char *buf)
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{
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	struct bonding *bond = to_bond(d);
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	return sprintf(buf, "%s %d\n",
			bond_mode_tbl[bond->params.mode].modename,
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			bond->params.mode);
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}

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static ssize_t bonding_store_mode(struct device *d,
				  struct device_attribute *attr,
				  const char *buf, size_t count)
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{
	int new_value, ret = count;
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	struct bonding *bond = to_bond(d);
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	if (bond->dev->flags & IFF_UP) {
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		pr_err("unable to update mode of %s because interface is up.\n",
		       bond->dev->name);
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		ret = -EPERM;
		goto out;
	}

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	if (bond->slave_cnt > 0) {
		pr_err("unable to update mode of %s because it has slaves.\n",
			bond->dev->name);
		ret = -EPERM;
		goto out;
	}

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	new_value = bond_parse_parm(buf, bond_mode_tbl);
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	if (new_value < 0)  {
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		pr_err("%s: Ignoring invalid mode value %.*s.\n",
		       bond->dev->name, (int)strlen(buf) - 1, buf);
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		ret = -EINVAL;
		goto out;
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	}
	if ((new_value == BOND_MODE_ALB ||
	     new_value == BOND_MODE_TLB) &&
	    bond->params.arp_interval) {
		pr_err("%s: %s mode is incompatible with arp monitoring.\n",
		       bond->dev->name, bond_mode_tbl[new_value].modename);
		ret = -EINVAL;
		goto out;
	}
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	bond->params.mode = new_value;
	bond_set_mode_ops(bond, bond->params.mode);
	pr_info("%s: setting mode to %s (%d).\n",
		bond->dev->name, bond_mode_tbl[new_value].modename,
		new_value);
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out:
	return ret;
}
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static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
		   bonding_show_mode, bonding_store_mode);
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/*
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 * Show and set the bonding transmit hash method.
 * The bond interface must be down to change the xmit hash policy.
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 */
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static ssize_t bonding_show_xmit_hash(struct device *d,
				      struct device_attribute *attr,
				      char *buf)
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{
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	struct bonding *bond = to_bond(d);
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	return sprintf(buf, "%s %d\n",
		       xmit_hashtype_tbl[bond->params.xmit_policy].modename,
		       bond->params.xmit_policy);
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}

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static ssize_t bonding_store_xmit_hash(struct device *d,
				       struct device_attribute *attr,
				       const char *buf, size_t count)
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{
	int new_value, ret = count;
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	struct bonding *bond = to_bond(d);
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	if (bond->dev->flags & IFF_UP) {
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		pr_err("%s: Interface is up. Unable to update xmit policy.\n",
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		       bond->dev->name);
		ret = -EPERM;
		goto out;
	}

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	new_value = bond_parse_parm(buf, xmit_hashtype_tbl);
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	if (new_value < 0)  {
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		pr_err("%s: Ignoring invalid xmit hash policy value %.*s.\n",
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		       bond->dev->name,
		       (int)strlen(buf) - 1, buf);
		ret = -EINVAL;
		goto out;
	} else {
		bond->params.xmit_policy = new_value;
		bond_set_mode_ops(bond, bond->params.mode);
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		pr_info("%s: setting xmit hash policy to %s (%d).\n",
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			bond->dev->name,
			xmit_hashtype_tbl[new_value].modename, new_value);
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	}
out:
	return ret;
}
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static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR,
		   bonding_show_xmit_hash, bonding_store_xmit_hash);
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/*
 * Show and set arp_validate.
 */
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static ssize_t bonding_show_arp_validate(struct device *d,
					 struct device_attribute *attr,
					 char *buf)
410
{
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	struct bonding *bond = to_bond(d);
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	return sprintf(buf, "%s %d\n",
		       arp_validate_tbl[bond->params.arp_validate].modename,
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		       bond->params.arp_validate);
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}

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static ssize_t bonding_store_arp_validate(struct device *d,
					  struct device_attribute *attr,
					  const char *buf, size_t count)
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{
	int new_value;
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	struct bonding *bond = to_bond(d);
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	new_value = bond_parse_parm(buf, arp_validate_tbl);
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	if (new_value < 0) {
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		pr_err("%s: Ignoring invalid arp_validate value %s\n",
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		       bond->dev->name, buf);
		return -EINVAL;
	}
	if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
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		pr_err("%s: arp_validate only supported in active-backup mode.\n",
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		       bond->dev->name);
		return -EINVAL;
	}
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	pr_info("%s: setting arp_validate to %s (%d).\n",
		bond->dev->name, arp_validate_tbl[new_value].modename,
		new_value);
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	bond->params.arp_validate = new_value;

	return count;
}

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static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate,
		   bonding_store_arp_validate);
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/*
 * Show and store fail_over_mac.  User only allowed to change the
 * value when there are no slaves.
 */
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static ssize_t bonding_show_fail_over_mac(struct device *d,
					  struct device_attribute *attr,
					  char *buf)
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{
	struct bonding *bond = to_bond(d);

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	return sprintf(buf, "%s %d\n",
		       fail_over_mac_tbl[bond->params.fail_over_mac].modename,
		       bond->params.fail_over_mac);
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}

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static ssize_t bonding_store_fail_over_mac(struct device *d,
					   struct device_attribute *attr,
					   const char *buf, size_t count)
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{
	int new_value;
	struct bonding *bond = to_bond(d);

	if (bond->slave_cnt != 0) {
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		pr_err("%s: Can't alter fail_over_mac with slaves in bond.\n",
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		       bond->dev->name);
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		return -EPERM;
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	}

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	new_value = bond_parse_parm(buf, fail_over_mac_tbl);
	if (new_value < 0) {
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		pr_err("%s: Ignoring invalid fail_over_mac value %s.\n",
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		       bond->dev->name, buf);
		return -EINVAL;
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	}

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	bond->params.fail_over_mac = new_value;
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	pr_info("%s: Setting fail_over_mac to %s (%d).\n",
		bond->dev->name, fail_over_mac_tbl[new_value].modename,
		new_value);
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	return count;
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}

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static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR,
		   bonding_show_fail_over_mac, bonding_store_fail_over_mac);
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/*
 * Show and set the arp timer interval.  There are two tricky bits
 * here.  First, if ARP monitoring is activated, then we must disable
 * MII monitoring.  Second, if the ARP timer isn't running, we must
 * start it.
 */
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static ssize_t bonding_show_arp_interval(struct device *d,
					 struct device_attribute *attr,
					 char *buf)
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{
504
	struct bonding *bond = to_bond(d);
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	return sprintf(buf, "%d\n", bond->params.arp_interval);
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}

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static ssize_t bonding_store_arp_interval(struct device *d,
					  struct device_attribute *attr,
					  const char *buf, size_t count)
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{
	int new_value, ret = count;
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	struct bonding *bond = to_bond(d);
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	if (sscanf(buf, "%d", &new_value) != 1) {
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		pr_err("%s: no arp_interval value specified.\n",
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		       bond->dev->name);
		ret = -EINVAL;
		goto out;
	}
	if (new_value < 0) {
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		pr_err("%s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
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		       bond->dev->name, new_value, INT_MAX);
		ret = -EINVAL;
		goto out;
	}
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	if (bond->params.mode == BOND_MODE_ALB ||
	    bond->params.mode == BOND_MODE_TLB) {
		pr_info("%s: ARP monitoring cannot be used with ALB/TLB. Only MII monitoring is supported on %s.\n",
			bond->dev->name, bond->dev->name);
		ret = -EINVAL;
		goto out;
	}
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	pr_info("%s: Setting ARP monitoring interval to %d.\n",
		bond->dev->name, new_value);
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	bond->params.arp_interval = new_value;
	if (bond->params.miimon) {
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		pr_info("%s: ARP monitoring cannot be used with MII monitoring. %s Disabling MII monitoring.\n",
			bond->dev->name, bond->dev->name);
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		bond->params.miimon = 0;
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		if (delayed_work_pending(&bond->mii_work)) {
			cancel_delayed_work(&bond->mii_work);
			flush_workqueue(bond->wq);
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		}
	}
	if (!bond->params.arp_targets[0]) {
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		pr_info("%s: ARP monitoring has been set up, but no ARP targets have been specified.\n",
			bond->dev->name);
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	}
	if (bond->dev->flags & IFF_UP) {
		/* If the interface is up, we may need to fire off
		 * the ARP timer.  If the interface is down, the
		 * timer will get fired off when the open function
		 * is called.
		 */
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		if (!delayed_work_pending(&bond->arp_work)) {
			if (bond->params.mode == BOND_MODE_ACTIVEBACKUP)
				INIT_DELAYED_WORK(&bond->arp_work,
						  bond_activebackup_arp_mon);
			else
				INIT_DELAYED_WORK(&bond->arp_work,
						  bond_loadbalance_arp_mon);

			queue_delayed_work(bond->wq, &bond->arp_work, 0);
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		}
	}

out:
	return ret;
}
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static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR,
		   bonding_show_arp_interval, bonding_store_arp_interval);
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/*
 * Show and set the arp targets.
 */
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static ssize_t bonding_show_arp_targets(struct device *d,
					struct device_attribute *attr,
					char *buf)
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{
	int i, res = 0;
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	struct bonding *bond = to_bond(d);
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	for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
		if (bond->params.arp_targets[i])
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			res += sprintf(buf + res, "%pI4 ",
				       &bond->params.arp_targets[i]);
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	}
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	if (res)
		buf[res-1] = '\n'; /* eat the leftover space */
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	return res;
}

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static ssize_t bonding_store_arp_targets(struct device *d,
					 struct device_attribute *attr,
					 const char *buf, size_t count)
598
{
599
	__be32 newtarget;
600
	int i = 0, done = 0, ret = count;
601
	struct bonding *bond = to_bond(d);
602
	__be32 *targets;
603 604 605 606 607

	targets = bond->params.arp_targets;
	newtarget = in_aton(buf + 1);
	/* look for adds */
	if (buf[0] == '+') {
608
		if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
J
Joe Perches 已提交
609
			pr_err("%s: invalid ARP target %pI4 specified for addition\n",
H
Harvey Harrison 已提交
610
			       bond->dev->name, &newtarget);
611 612 613 614
			ret = -EINVAL;
			goto out;
		}
		/* look for an empty slot to put the target in, and check for dupes */
615
		for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
616
			if (targets[i] == newtarget) { /* duplicate */
J
Joe Perches 已提交
617
				pr_err("%s: ARP target %pI4 is already present\n",
H
Harvey Harrison 已提交
618
				       bond->dev->name, &newtarget);
619 620 621
				ret = -EINVAL;
				goto out;
			}
622
			if (targets[i] == 0) {
J
Joe Perches 已提交
623 624
				pr_info("%s: adding ARP target %pI4.\n",
					bond->dev->name, &newtarget);
625 626 627 628 629
				done = 1;
				targets[i] = newtarget;
			}
		}
		if (!done) {
J
Joe Perches 已提交
630
			pr_err("%s: ARP target table is full!\n",
631 632 633 634 635
			       bond->dev->name);
			ret = -EINVAL;
			goto out;
		}

S
Stephen Hemminger 已提交
636
	} else if (buf[0] == '-')	{
637
		if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
J
Joe Perches 已提交
638
			pr_err("%s: invalid ARP target %pI4 specified for removal\n",
H
Harvey Harrison 已提交
639
			       bond->dev->name, &newtarget);
640 641 642 643
			ret = -EINVAL;
			goto out;
		}

644
		for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
645
			if (targets[i] == newtarget) {
646
				int j;
J
Joe Perches 已提交
647 648
				pr_info("%s: removing ARP target %pI4.\n",
					bond->dev->name, &newtarget);
649 650 651 652
				for (j = i; (j < (BOND_MAX_ARP_TARGETS-1)) && targets[j+1]; j++)
					targets[j] = targets[j+1];

				targets[j] = 0;
653 654 655 656
				done = 1;
			}
		}
		if (!done) {
J
Joe Perches 已提交
657 658
			pr_info("%s: unable to remove nonexistent ARP target %pI4.\n",
				bond->dev->name, &newtarget);
659 660 661
			ret = -EINVAL;
			goto out;
		}
S
Stephen Hemminger 已提交
662
	} else {
J
Joe Perches 已提交
663 664
		pr_err("no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
		       bond->dev->name);
665 666 667 668 669 670 671
		ret = -EPERM;
		goto out;
	}

out:
	return ret;
}
672
static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
673 674 675 676 677 678

/*
 * Show and set the up and down delays.  These must be multiples of the
 * MII monitoring value, and are stored internally as the multiplier.
 * Thus, we must translate to MS for the real world.
 */
679 680 681
static ssize_t bonding_show_downdelay(struct device *d,
				      struct device_attribute *attr,
				      char *buf)
682
{
683
	struct bonding *bond = to_bond(d);
684

685
	return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
686 687
}

688 689 690
static ssize_t bonding_store_downdelay(struct device *d,
				       struct device_attribute *attr,
				       const char *buf, size_t count)
691 692
{
	int new_value, ret = count;
693
	struct bonding *bond = to_bond(d);
694 695

	if (!(bond->params.miimon)) {
J
Joe Perches 已提交
696
		pr_err("%s: Unable to set down delay as MII monitoring is disabled\n",
697 698 699 700 701 702
		       bond->dev->name);
		ret = -EPERM;
		goto out;
	}

	if (sscanf(buf, "%d", &new_value) != 1) {
J
Joe Perches 已提交
703
		pr_err("%s: no down delay value specified.\n", bond->dev->name);
704 705 706 707
		ret = -EINVAL;
		goto out;
	}
	if (new_value < 0) {
J
Joe Perches 已提交
708
		pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
709 710 711 712 713
		       bond->dev->name, new_value, 1, INT_MAX);
		ret = -EINVAL;
		goto out;
	} else {
		if ((new_value % bond->params.miimon) != 0) {
J
Joe Perches 已提交
714
			pr_warning("%s: Warning: down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
J
Jiri Pirko 已提交
715 716 717 718
				   bond->dev->name, new_value,
				   bond->params.miimon,
				   (new_value / bond->params.miimon) *
				   bond->params.miimon);
719 720
		}
		bond->params.downdelay = new_value / bond->params.miimon;
J
Joe Perches 已提交
721 722 723
		pr_info("%s: Setting down delay to %d.\n",
			bond->dev->name,
			bond->params.downdelay * bond->params.miimon);
724 725 726 727 728 729

	}

out:
	return ret;
}
S
Stephen Hemminger 已提交
730 731
static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR,
		   bonding_show_downdelay, bonding_store_downdelay);
732

733 734 735
static ssize_t bonding_show_updelay(struct device *d,
				    struct device_attribute *attr,
				    char *buf)
736
{
737
	struct bonding *bond = to_bond(d);
738

739
	return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
740 741 742

}

743 744 745
static ssize_t bonding_store_updelay(struct device *d,
				     struct device_attribute *attr,
				     const char *buf, size_t count)
746 747
{
	int new_value, ret = count;
748
	struct bonding *bond = to_bond(d);
749 750

	if (!(bond->params.miimon)) {
J
Joe Perches 已提交
751
		pr_err("%s: Unable to set up delay as MII monitoring is disabled\n",
752 753 754 755 756 757
		       bond->dev->name);
		ret = -EPERM;
		goto out;
	}

	if (sscanf(buf, "%d", &new_value) != 1) {
J
Joe Perches 已提交
758
		pr_err("%s: no up delay value specified.\n",
759 760 761 762 763
		       bond->dev->name);
		ret = -EINVAL;
		goto out;
	}
	if (new_value < 0) {
J
Joe Perches 已提交
764
		pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
765 766 767 768 769
		       bond->dev->name, new_value, 1, INT_MAX);
		ret = -EINVAL;
		goto out;
	} else {
		if ((new_value % bond->params.miimon) != 0) {
J
Joe Perches 已提交
770
			pr_warning("%s: Warning: up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
J
Jiri Pirko 已提交
771 772 773 774
				   bond->dev->name, new_value,
				   bond->params.miimon,
				   (new_value / bond->params.miimon) *
				   bond->params.miimon);
775 776
		}
		bond->params.updelay = new_value / bond->params.miimon;
J
Joe Perches 已提交
777 778 779
		pr_info("%s: Setting up delay to %d.\n",
			bond->dev->name,
			bond->params.updelay * bond->params.miimon);
780 781 782 783 784
	}

out:
	return ret;
}
S
Stephen Hemminger 已提交
785 786
static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR,
		   bonding_show_updelay, bonding_store_updelay);
787 788 789 790 791

/*
 * Show and set the LACP interval.  Interface must be down, and the mode
 * must be set to 802.3ad mode.
 */
792 793 794
static ssize_t bonding_show_lacp(struct device *d,
				 struct device_attribute *attr,
				 char *buf)
795
{
796
	struct bonding *bond = to_bond(d);
797 798 799

	return sprintf(buf, "%s %d\n",
		bond_lacp_tbl[bond->params.lacp_fast].modename,
800
		bond->params.lacp_fast);
801 802
}

803 804 805
static ssize_t bonding_store_lacp(struct device *d,
				  struct device_attribute *attr,
				  const char *buf, size_t count)
806 807
{
	int new_value, ret = count;
808
	struct bonding *bond = to_bond(d);
809 810

	if (bond->dev->flags & IFF_UP) {
J
Joe Perches 已提交
811
		pr_err("%s: Unable to update LACP rate because interface is up.\n",
812 813 814 815 816 817
		       bond->dev->name);
		ret = -EPERM;
		goto out;
	}

	if (bond->params.mode != BOND_MODE_8023AD) {
J
Joe Perches 已提交
818
		pr_err("%s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
819 820 821 822 823
		       bond->dev->name);
		ret = -EPERM;
		goto out;
	}

J
Jay Vosburgh 已提交
824
	new_value = bond_parse_parm(buf, bond_lacp_tbl);
825 826 827

	if ((new_value == 1) || (new_value == 0)) {
		bond->params.lacp_fast = new_value;
828
		bond_3ad_update_lacp_rate(bond);
J
Joe Perches 已提交
829
		pr_info("%s: Setting LACP rate to %s (%d).\n",
S
Stephen Hemminger 已提交
830 831
			bond->dev->name, bond_lacp_tbl[new_value].modename,
			new_value);
832
	} else {
J
Joe Perches 已提交
833
		pr_err("%s: Ignoring invalid LACP rate value %.*s.\n",
S
Stephen Hemminger 已提交
834
		       bond->dev->name, (int)strlen(buf) - 1, buf);
835 836 837 838 839
		ret = -EINVAL;
	}
out:
	return ret;
}
S
Stephen Hemminger 已提交
840 841
static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR,
		   bonding_show_lacp, bonding_store_lacp);
842

843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874
static ssize_t bonding_show_min_links(struct device *d,
				      struct device_attribute *attr,
				      char *buf)
{
	struct bonding *bond = to_bond(d);

	return sprintf(buf, "%d\n", bond->params.min_links);
}

static ssize_t bonding_store_min_links(struct device *d,
				       struct device_attribute *attr,
				       const char *buf, size_t count)
{
	struct bonding *bond = to_bond(d);
	int ret;
	unsigned int new_value;

	ret = kstrtouint(buf, 0, &new_value);
	if (ret < 0) {
		pr_err("%s: Ignoring invalid min links value %s.\n",
		       bond->dev->name, buf);
		return ret;
	}

	pr_info("%s: Setting min links value to %u\n",
		bond->dev->name, new_value);
	bond->params.min_links = new_value;
	return count;
}
static DEVICE_ATTR(min_links, S_IRUGO | S_IWUSR,
		   bonding_show_min_links, bonding_store_min_links);

875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894
static ssize_t bonding_show_ad_select(struct device *d,
				      struct device_attribute *attr,
				      char *buf)
{
	struct bonding *bond = to_bond(d);

	return sprintf(buf, "%s %d\n",
		ad_select_tbl[bond->params.ad_select].modename,
		bond->params.ad_select);
}


static ssize_t bonding_store_ad_select(struct device *d,
				       struct device_attribute *attr,
				       const char *buf, size_t count)
{
	int new_value, ret = count;
	struct bonding *bond = to_bond(d);

	if (bond->dev->flags & IFF_UP) {
J
Joe Perches 已提交
895 896
		pr_err("%s: Unable to update ad_select because interface is up.\n",
		       bond->dev->name);
897 898 899 900 901 902 903 904
		ret = -EPERM;
		goto out;
	}

	new_value = bond_parse_parm(buf, ad_select_tbl);

	if (new_value != -1) {
		bond->params.ad_select = new_value;
J
Joe Perches 已提交
905 906 907
		pr_info("%s: Setting ad_select to %s (%d).\n",
			bond->dev->name, ad_select_tbl[new_value].modename,
			new_value);
908
	} else {
J
Joe Perches 已提交
909
		pr_err("%s: Ignoring invalid ad_select value %.*s.\n",
910 911 912 913 914 915
		       bond->dev->name, (int)strlen(buf) - 1, buf);
		ret = -EINVAL;
	}
out:
	return ret;
}
S
Stephen Hemminger 已提交
916 917
static DEVICE_ATTR(ad_select, S_IRUGO | S_IWUSR,
		   bonding_show_ad_select, bonding_store_ad_select);
918

919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942
/*
 * Show and set the number of peer notifications to send after a failover event.
 */
static ssize_t bonding_show_num_peer_notif(struct device *d,
					   struct device_attribute *attr,
					   char *buf)
{
	struct bonding *bond = to_bond(d);
	return sprintf(buf, "%d\n", bond->params.num_peer_notif);
}

static ssize_t bonding_store_num_peer_notif(struct device *d,
					    struct device_attribute *attr,
					    const char *buf, size_t count)
{
	struct bonding *bond = to_bond(d);
	int err = kstrtou8(buf, 10, &bond->params.num_peer_notif);
	return err ? err : count;
}
static DEVICE_ATTR(num_grat_arp, S_IRUGO | S_IWUSR,
		   bonding_show_num_peer_notif, bonding_store_num_peer_notif);
static DEVICE_ATTR(num_unsol_na, S_IRUGO | S_IWUSR,
		   bonding_show_num_peer_notif, bonding_store_num_peer_notif);

943 944 945 946 947 948
/*
 * Show and set the MII monitor interval.  There are two tricky bits
 * here.  First, if MII monitoring is activated, then we must disable
 * ARP monitoring.  Second, if the timer isn't running, we must
 * start it.
 */
949 950 951
static ssize_t bonding_show_miimon(struct device *d,
				   struct device_attribute *attr,
				   char *buf)
952
{
953
	struct bonding *bond = to_bond(d);
954

955
	return sprintf(buf, "%d\n", bond->params.miimon);
956 957
}

958 959 960
static ssize_t bonding_store_miimon(struct device *d,
				    struct device_attribute *attr,
				    const char *buf, size_t count)
961 962
{
	int new_value, ret = count;
963
	struct bonding *bond = to_bond(d);
964 965

	if (sscanf(buf, "%d", &new_value) != 1) {
J
Joe Perches 已提交
966
		pr_err("%s: no miimon value specified.\n",
967 968 969 970 971
		       bond->dev->name);
		ret = -EINVAL;
		goto out;
	}
	if (new_value < 0) {
J
Joe Perches 已提交
972
		pr_err("%s: Invalid miimon value %d not in range %d-%d; rejected.\n",
973 974 975 976
		       bond->dev->name, new_value, 1, INT_MAX);
		ret = -EINVAL;
		goto out;
	} else {
J
Joe Perches 已提交
977 978
		pr_info("%s: Setting MII monitoring interval to %d.\n",
			bond->dev->name, new_value);
979
		bond->params.miimon = new_value;
S
Stephen Hemminger 已提交
980
		if (bond->params.updelay)
J
Joe Perches 已提交
981 982 983
			pr_info("%s: Note: Updating updelay (to %d) since it is a multiple of the miimon value.\n",
				bond->dev->name,
				bond->params.updelay * bond->params.miimon);
S
Stephen Hemminger 已提交
984
		if (bond->params.downdelay)
J
Joe Perches 已提交
985 986 987
			pr_info("%s: Note: Updating downdelay (to %d) since it is a multiple of the miimon value.\n",
				bond->dev->name,
				bond->params.downdelay * bond->params.miimon);
988
		if (bond->params.arp_interval) {
J
Joe Perches 已提交
989 990
			pr_info("%s: MII monitoring cannot be used with ARP monitoring. Disabling ARP monitoring...\n",
				bond->dev->name);
991
			bond->params.arp_interval = 0;
992 993 994 995
			if (bond->params.arp_validate) {
				bond->params.arp_validate =
					BOND_ARP_VALIDATE_NONE;
			}
996 997 998
			if (delayed_work_pending(&bond->arp_work)) {
				cancel_delayed_work(&bond->arp_work);
				flush_workqueue(bond->wq);
999 1000 1001 1002 1003 1004 1005 1006 1007
			}
		}

		if (bond->dev->flags & IFF_UP) {
			/* If the interface is up, we may need to fire off
			 * the MII timer. If the interface is down, the
			 * timer will get fired off when the open function
			 * is called.
			 */
1008 1009 1010 1011 1012
			if (!delayed_work_pending(&bond->mii_work)) {
				INIT_DELAYED_WORK(&bond->mii_work,
						  bond_mii_monitor);
				queue_delayed_work(bond->wq,
						   &bond->mii_work, 0);
1013 1014 1015 1016 1017 1018
			}
		}
	}
out:
	return ret;
}
S
Stephen Hemminger 已提交
1019 1020
static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR,
		   bonding_show_miimon, bonding_store_miimon);
1021 1022 1023 1024 1025 1026 1027 1028

/*
 * Show and set the primary slave.  The store function is much
 * simpler than bonding_store_slaves function because it only needs to
 * handle one interface name.
 * The bond must be a mode that supports a primary for this be
 * set.
 */
1029 1030 1031
static ssize_t bonding_show_primary(struct device *d,
				    struct device_attribute *attr,
				    char *buf)
1032 1033
{
	int count = 0;
1034
	struct bonding *bond = to_bond(d);
1035 1036

	if (bond->primary_slave)
1037
		count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
1038 1039 1040 1041

	return count;
}

1042 1043 1044
static ssize_t bonding_store_primary(struct device *d,
				     struct device_attribute *attr,
				     const char *buf, size_t count)
1045 1046 1047
{
	int i;
	struct slave *slave;
1048
	struct bonding *bond = to_bond(d);
1049
	char ifname[IFNAMSIZ];
1050

1051 1052
	if (!rtnl_trylock())
		return restart_syscall();
1053
	block_netpoll_tx();
1054 1055 1056
	read_lock(&bond->lock);
	write_lock_bh(&bond->curr_slave_lock);

1057
	if (!USES_PRIMARY(bond->params.mode)) {
J
Joe Perches 已提交
1058 1059
		pr_info("%s: Unable to set primary slave; %s is in mode %d\n",
			bond->dev->name, bond->dev->name, bond->params.mode);
1060 1061
		goto out;
	}
1062

1063
	sscanf(buf, "%16s", ifname); /* IFNAMSIZ */
1064

1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081
	/* check to see if we are clearing primary */
	if (!strlen(ifname) || buf[0] == '\n') {
		pr_info("%s: Setting primary slave to None.\n",
			bond->dev->name);
		bond->primary_slave = NULL;
		bond_select_active_slave(bond);
		goto out;
	}

	bond_for_each_slave(bond, slave, i) {
		if (strncmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
			pr_info("%s: Setting %s as primary slave.\n",
				bond->dev->name, slave->dev->name);
			bond->primary_slave = slave;
			strcpy(bond->params.primary, slave->dev->name);
			bond_select_active_slave(bond);
			goto out;
1082 1083
		}
	}
1084

1085 1086 1087 1088 1089 1090
	strncpy(bond->params.primary, ifname, IFNAMSIZ);
	bond->params.primary[IFNAMSIZ - 1] = 0;

	pr_info("%s: Recording %s as primary, "
		"but it has not been enslaved to %s yet.\n",
		bond->dev->name, ifname, bond->dev->name);
1091
out:
1092 1093
	write_unlock_bh(&bond->curr_slave_lock);
	read_unlock(&bond->lock);
1094
	unblock_netpoll_tx();
1095 1096
	rtnl_unlock();

1097 1098
	return count;
}
S
Stephen Hemminger 已提交
1099 1100
static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR,
		   bonding_show_primary, bonding_store_primary);
1101

1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127
/*
 * Show and set the primary_reselect flag.
 */
static ssize_t bonding_show_primary_reselect(struct device *d,
					     struct device_attribute *attr,
					     char *buf)
{
	struct bonding *bond = to_bond(d);

	return sprintf(buf, "%s %d\n",
		       pri_reselect_tbl[bond->params.primary_reselect].modename,
		       bond->params.primary_reselect);
}

static ssize_t bonding_store_primary_reselect(struct device *d,
					      struct device_attribute *attr,
					      const char *buf, size_t count)
{
	int new_value, ret = count;
	struct bonding *bond = to_bond(d);

	if (!rtnl_trylock())
		return restart_syscall();

	new_value = bond_parse_parm(buf, pri_reselect_tbl);
	if (new_value < 0)  {
J
Joe Perches 已提交
1128
		pr_err("%s: Ignoring invalid primary_reselect value %.*s.\n",
1129 1130 1131 1132 1133 1134 1135
		       bond->dev->name,
		       (int) strlen(buf) - 1, buf);
		ret = -EINVAL;
		goto out;
	}

	bond->params.primary_reselect = new_value;
J
Joe Perches 已提交
1136
	pr_info("%s: setting primary_reselect to %s (%d).\n",
1137 1138 1139
		bond->dev->name, pri_reselect_tbl[new_value].modename,
		new_value);

1140
	block_netpoll_tx();
1141 1142 1143 1144 1145
	read_lock(&bond->lock);
	write_lock_bh(&bond->curr_slave_lock);
	bond_select_active_slave(bond);
	write_unlock_bh(&bond->curr_slave_lock);
	read_unlock(&bond->lock);
1146
	unblock_netpoll_tx();
1147 1148 1149 1150 1151 1152 1153 1154
out:
	rtnl_unlock();
	return ret;
}
static DEVICE_ATTR(primary_reselect, S_IRUGO | S_IWUSR,
		   bonding_show_primary_reselect,
		   bonding_store_primary_reselect);

1155 1156 1157
/*
 * Show and set the use_carrier flag.
 */
1158 1159 1160
static ssize_t bonding_show_carrier(struct device *d,
				    struct device_attribute *attr,
				    char *buf)
1161
{
1162
	struct bonding *bond = to_bond(d);
1163

1164
	return sprintf(buf, "%d\n", bond->params.use_carrier);
1165 1166
}

1167 1168 1169
static ssize_t bonding_store_carrier(struct device *d,
				     struct device_attribute *attr,
				     const char *buf, size_t count)
1170 1171
{
	int new_value, ret = count;
1172
	struct bonding *bond = to_bond(d);
1173 1174 1175


	if (sscanf(buf, "%d", &new_value) != 1) {
J
Joe Perches 已提交
1176
		pr_err("%s: no use_carrier value specified.\n",
1177 1178 1179 1180 1181 1182
		       bond->dev->name);
		ret = -EINVAL;
		goto out;
	}
	if ((new_value == 0) || (new_value == 1)) {
		bond->params.use_carrier = new_value;
J
Joe Perches 已提交
1183 1184
		pr_info("%s: Setting use_carrier to %d.\n",
			bond->dev->name, new_value);
1185
	} else {
J
Joe Perches 已提交
1186 1187
		pr_info("%s: Ignoring invalid use_carrier value %d.\n",
			bond->dev->name, new_value);
1188 1189
	}
out:
1190
	return ret;
1191
}
S
Stephen Hemminger 已提交
1192 1193
static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR,
		   bonding_show_carrier, bonding_store_carrier);
1194 1195 1196 1197 1198


/*
 * Show and set currently active_slave.
 */
1199 1200 1201
static ssize_t bonding_show_active_slave(struct device *d,
					 struct device_attribute *attr,
					 char *buf)
1202 1203
{
	struct slave *curr;
1204
	struct bonding *bond = to_bond(d);
1205
	int count = 0;
1206 1207 1208 1209 1210 1211

	read_lock(&bond->curr_slave_lock);
	curr = bond->curr_active_slave;
	read_unlock(&bond->curr_slave_lock);

	if (USES_PRIMARY(bond->params.mode) && curr)
1212
		count = sprintf(buf, "%s\n", curr->dev->name);
1213 1214 1215
	return count;
}

1216 1217 1218
static ssize_t bonding_store_active_slave(struct device *d,
					  struct device_attribute *attr,
					  const char *buf, size_t count)
1219 1220 1221
{
	int i;
	struct slave *slave;
S
Stephen Hemminger 已提交
1222 1223
	struct slave *old_active = NULL;
	struct slave *new_active = NULL;
1224
	struct bonding *bond = to_bond(d);
1225
	char ifname[IFNAMSIZ];
1226

1227 1228
	if (!rtnl_trylock())
		return restart_syscall();
1229 1230

	block_netpoll_tx();
1231 1232
	read_lock(&bond->lock);
	write_lock_bh(&bond->curr_slave_lock);
1233

1234
	if (!USES_PRIMARY(bond->params.mode)) {
J
Joe Perches 已提交
1235
		pr_info("%s: Unable to change active slave; %s is in mode %d\n",
S
Stephen Hemminger 已提交
1236
			bond->dev->name, bond->dev->name, bond->params.mode);
1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269
		goto out;
	}

	sscanf(buf, "%16s", ifname); /* IFNAMSIZ */

	/* check to see if we are clearing active */
	if (!strlen(ifname) || buf[0] == '\n') {
		pr_info("%s: Clearing current active slave.\n",
			bond->dev->name);
		bond->curr_active_slave = NULL;
		bond_select_active_slave(bond);
		goto out;
	}

	bond_for_each_slave(bond, slave, i) {
		if (strncmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
			old_active = bond->curr_active_slave;
			new_active = slave;
			if (new_active == old_active) {
				/* do nothing */
				pr_info("%s: %s is already the current"
					" active slave.\n",
					bond->dev->name,
					slave->dev->name);
				goto out;
			}
			else {
				if ((new_active) &&
				    (old_active) &&
				    (new_active->link == BOND_LINK_UP) &&
				    IS_UP(new_active->dev)) {
					pr_info("%s: Setting %s as active"
						" slave.\n",
J
Joe Perches 已提交
1270 1271
						bond->dev->name,
						slave->dev->name);
1272 1273
					bond_change_active_slave(bond,
								 new_active);
1274 1275
				}
				else {
1276 1277 1278 1279 1280 1281
					pr_info("%s: Could not set %s as"
						" active slave; either %s is"
						" down or the link is down.\n",
						bond->dev->name,
						slave->dev->name,
						slave->dev->name);
1282
				}
1283
				goto out;
1284 1285 1286
			}
		}
	}
1287 1288 1289

	pr_info("%s: Unable to set %.*s as active slave.\n",
		bond->dev->name, (int)strlen(buf) - 1, buf);
S
Stephen Hemminger 已提交
1290
 out:
1291 1292
	write_unlock_bh(&bond->curr_slave_lock);
	read_unlock(&bond->lock);
1293 1294
	unblock_netpoll_tx();

1295 1296
	rtnl_unlock();

1297 1298 1299
	return count;

}
S
Stephen Hemminger 已提交
1300 1301
static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR,
		   bonding_show_active_slave, bonding_store_active_slave);
1302 1303 1304 1305 1306


/*
 * Show link status of the bond interface.
 */
1307 1308 1309
static ssize_t bonding_show_mii_status(struct device *d,
				       struct device_attribute *attr,
				       char *buf)
1310 1311
{
	struct slave *curr;
1312
	struct bonding *bond = to_bond(d);
1313 1314 1315 1316 1317

	read_lock(&bond->curr_slave_lock);
	curr = bond->curr_active_slave;
	read_unlock(&bond->curr_slave_lock);

S
Stephen Hemminger 已提交
1318
	return sprintf(buf, "%s\n", curr ? "up" : "down");
1319
}
1320
static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1321 1322 1323 1324 1325


/*
 * Show current 802.3ad aggregator ID.
 */
1326 1327 1328
static ssize_t bonding_show_ad_aggregator(struct device *d,
					  struct device_attribute *attr,
					  char *buf)
1329 1330
{
	int count = 0;
1331
	struct bonding *bond = to_bond(d);
1332 1333 1334

	if (bond->params.mode == BOND_MODE_8023AD) {
		struct ad_info ad_info;
S
Stephen Hemminger 已提交
1335 1336 1337
		count = sprintf(buf, "%d\n",
				(bond_3ad_get_active_agg_info(bond, &ad_info))
				?  0 : ad_info.aggregator_id);
1338 1339 1340 1341
	}

	return count;
}
1342
static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1343 1344 1345 1346 1347


/*
 * Show number of active 802.3ad ports.
 */
1348 1349 1350
static ssize_t bonding_show_ad_num_ports(struct device *d,
					 struct device_attribute *attr,
					 char *buf)
1351 1352
{
	int count = 0;
1353
	struct bonding *bond = to_bond(d);
1354 1355 1356

	if (bond->params.mode == BOND_MODE_8023AD) {
		struct ad_info ad_info;
S
Stephen Hemminger 已提交
1357 1358 1359
		count = sprintf(buf, "%d\n",
				(bond_3ad_get_active_agg_info(bond, &ad_info))
				?  0 : ad_info.ports);
1360 1361 1362 1363
	}

	return count;
}
1364
static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1365 1366 1367 1368 1369


/*
 * Show current 802.3ad actor key.
 */
1370 1371 1372
static ssize_t bonding_show_ad_actor_key(struct device *d,
					 struct device_attribute *attr,
					 char *buf)
1373 1374
{
	int count = 0;
1375
	struct bonding *bond = to_bond(d);
1376 1377 1378

	if (bond->params.mode == BOND_MODE_8023AD) {
		struct ad_info ad_info;
S
Stephen Hemminger 已提交
1379 1380 1381
		count = sprintf(buf, "%d\n",
				(bond_3ad_get_active_agg_info(bond, &ad_info))
				?  0 : ad_info.actor_key);
1382 1383 1384 1385
	}

	return count;
}
1386
static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1387 1388 1389 1390 1391


/*
 * Show current 802.3ad partner key.
 */
1392 1393 1394
static ssize_t bonding_show_ad_partner_key(struct device *d,
					   struct device_attribute *attr,
					   char *buf)
1395 1396
{
	int count = 0;
1397
	struct bonding *bond = to_bond(d);
1398 1399 1400

	if (bond->params.mode == BOND_MODE_8023AD) {
		struct ad_info ad_info;
S
Stephen Hemminger 已提交
1401 1402 1403
		count = sprintf(buf, "%d\n",
				(bond_3ad_get_active_agg_info(bond, &ad_info))
				?  0 : ad_info.partner_key);
1404 1405 1406 1407
	}

	return count;
}
1408
static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1409 1410 1411 1412 1413


/*
 * Show current 802.3ad partner mac.
 */
1414 1415 1416
static ssize_t bonding_show_ad_partner_mac(struct device *d,
					   struct device_attribute *attr,
					   char *buf)
1417 1418
{
	int count = 0;
1419
	struct bonding *bond = to_bond(d);
1420 1421 1422

	if (bond->params.mode == BOND_MODE_8023AD) {
		struct ad_info ad_info;
S
Stephen Hemminger 已提交
1423
		if (!bond_3ad_get_active_agg_info(bond, &ad_info))
J
Johannes Berg 已提交
1424
			count = sprintf(buf, "%pM\n", ad_info.partner_system);
1425 1426 1427 1428
	}

	return count;
}
1429
static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1430

1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446
/*
 * Show the queue_ids of the slaves in the current bond.
 */
static ssize_t bonding_show_queue_id(struct device *d,
				     struct device_attribute *attr,
				     char *buf)
{
	struct slave *slave;
	int i, res = 0;
	struct bonding *bond = to_bond(d);

	if (!rtnl_trylock())
		return restart_syscall();

	read_lock(&bond->lock);
	bond_for_each_slave(bond, slave, i) {
1447 1448
		if (res > (PAGE_SIZE - IFNAMSIZ - 6)) {
			/* not enough space for another interface_name:queue_id pair */
1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497
			if ((PAGE_SIZE - res) > 10)
				res = PAGE_SIZE - 10;
			res += sprintf(buf + res, "++more++ ");
			break;
		}
		res += sprintf(buf + res, "%s:%d ",
			       slave->dev->name, slave->queue_id);
	}
	read_unlock(&bond->lock);
	if (res)
		buf[res-1] = '\n'; /* eat the leftover space */
	rtnl_unlock();
	return res;
}

/*
 * Set the queue_ids of the  slaves in the current bond.  The bond
 * interface must be enslaved for this to work.
 */
static ssize_t bonding_store_queue_id(struct device *d,
				      struct device_attribute *attr,
				      const char *buffer, size_t count)
{
	struct slave *slave, *update_slave;
	struct bonding *bond = to_bond(d);
	u16 qid;
	int i, ret = count;
	char *delim;
	struct net_device *sdev = NULL;

	if (!rtnl_trylock())
		return restart_syscall();

	/* delim will point to queue id if successful */
	delim = strchr(buffer, ':');
	if (!delim)
		goto err_no_cmd;

	/*
	 * Terminate string that points to device name and bump it
	 * up one, so we can read the queue id there.
	 */
	*delim = '\0';
	if (sscanf(++delim, "%hd\n", &qid) != 1)
		goto err_no_cmd;

	/* Check buffer length, valid ifname and queue id */
	if (strlen(buffer) > IFNAMSIZ ||
	    !dev_valid_name(buffer) ||
1498
	    qid > bond->dev->real_num_tx_queues)
1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545
		goto err_no_cmd;

	/* Get the pointer to that interface if it exists */
	sdev = __dev_get_by_name(dev_net(bond->dev), buffer);
	if (!sdev)
		goto err_no_cmd;

	read_lock(&bond->lock);

	/* Search for thes slave and check for duplicate qids */
	update_slave = NULL;
	bond_for_each_slave(bond, slave, i) {
		if (sdev == slave->dev)
			/*
			 * We don't need to check the matching
			 * slave for dups, since we're overwriting it
			 */
			update_slave = slave;
		else if (qid && qid == slave->queue_id) {
			goto err_no_cmd_unlock;
		}
	}

	if (!update_slave)
		goto err_no_cmd_unlock;

	/* Actually set the qids for the slave */
	update_slave->queue_id = qid;

	read_unlock(&bond->lock);
out:
	rtnl_unlock();
	return ret;

err_no_cmd_unlock:
	read_unlock(&bond->lock);
err_no_cmd:
	pr_info("invalid input for queue_id set for %s.\n",
		bond->dev->name);
	ret = -EPERM;
	goto out;
}

static DEVICE_ATTR(queue_id, S_IRUGO | S_IWUSR, bonding_show_queue_id,
		   bonding_store_queue_id);


1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583
/*
 * Show and set the all_slaves_active flag.
 */
static ssize_t bonding_show_slaves_active(struct device *d,
					  struct device_attribute *attr,
					  char *buf)
{
	struct bonding *bond = to_bond(d);

	return sprintf(buf, "%d\n", bond->params.all_slaves_active);
}

static ssize_t bonding_store_slaves_active(struct device *d,
					   struct device_attribute *attr,
					   const char *buf, size_t count)
{
	int i, new_value, ret = count;
	struct bonding *bond = to_bond(d);
	struct slave *slave;

	if (sscanf(buf, "%d", &new_value) != 1) {
		pr_err("%s: no all_slaves_active value specified.\n",
		       bond->dev->name);
		ret = -EINVAL;
		goto out;
	}

	if (new_value == bond->params.all_slaves_active)
		goto out;

	if ((new_value == 0) || (new_value == 1)) {
		bond->params.all_slaves_active = new_value;
	} else {
		pr_info("%s: Ignoring invalid all_slaves_active value %d.\n",
			bond->dev->name, new_value);
		ret = -EINVAL;
		goto out;
	}
1584

1585
	bond_for_each_slave(bond, slave, i) {
J
Jiri Pirko 已提交
1586
		if (!bond_is_active_slave(slave)) {
1587
			if (new_value)
1588
				slave->inactive = 0;
1589
			else
1590
				slave->inactive = 1;
1591 1592 1593
		}
	}
out:
1594
	return ret;
1595 1596 1597
}
static DEVICE_ATTR(all_slaves_active, S_IRUGO | S_IWUSR,
		   bonding_show_slaves_active, bonding_store_slaves_active);
1598

1599 1600 1601 1602
/*
 * Show and set the number of IGMP membership reports to send on link failure
 */
static ssize_t bonding_show_resend_igmp(struct device *d,
1603 1604
					struct device_attribute *attr,
					char *buf)
1605 1606 1607 1608 1609 1610 1611
{
	struct bonding *bond = to_bond(d);

	return sprintf(buf, "%d\n", bond->params.resend_igmp);
}

static ssize_t bonding_store_resend_igmp(struct device *d,
1612 1613
					 struct device_attribute *attr,
					 const char *buf, size_t count)
1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624
{
	int new_value, ret = count;
	struct bonding *bond = to_bond(d);

	if (sscanf(buf, "%d", &new_value) != 1) {
		pr_err("%s: no resend_igmp value specified.\n",
		       bond->dev->name);
		ret = -EINVAL;
		goto out;
	}

1625
	if (new_value < 0 || new_value > 255) {
1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641
		pr_err("%s: Invalid resend_igmp value %d not in range 0-255; rejected.\n",
		       bond->dev->name, new_value);
		ret = -EINVAL;
		goto out;
	}

	pr_info("%s: Setting resend_igmp to %d.\n",
		bond->dev->name, new_value);
	bond->params.resend_igmp = new_value;
out:
	return ret;
}

static DEVICE_ATTR(resend_igmp, S_IRUGO | S_IWUSR,
		   bonding_show_resend_igmp, bonding_store_resend_igmp);

1642
static struct attribute *per_bond_attrs[] = {
1643 1644
	&dev_attr_slaves.attr,
	&dev_attr_mode.attr,
1645
	&dev_attr_fail_over_mac.attr,
1646 1647 1648 1649 1650 1651
	&dev_attr_arp_validate.attr,
	&dev_attr_arp_interval.attr,
	&dev_attr_arp_ip_target.attr,
	&dev_attr_downdelay.attr,
	&dev_attr_updelay.attr,
	&dev_attr_lacp_rate.attr,
1652
	&dev_attr_ad_select.attr,
1653
	&dev_attr_xmit_hash_policy.attr,
1654 1655
	&dev_attr_num_grat_arp.attr,
	&dev_attr_num_unsol_na.attr,
1656 1657
	&dev_attr_miimon.attr,
	&dev_attr_primary.attr,
1658
	&dev_attr_primary_reselect.attr,
1659 1660 1661 1662 1663 1664 1665 1666
	&dev_attr_use_carrier.attr,
	&dev_attr_active_slave.attr,
	&dev_attr_mii_status.attr,
	&dev_attr_ad_aggregator.attr,
	&dev_attr_ad_num_ports.attr,
	&dev_attr_ad_actor_key.attr,
	&dev_attr_ad_partner_key.attr,
	&dev_attr_ad_partner_mac.attr,
1667
	&dev_attr_queue_id.attr,
1668
	&dev_attr_all_slaves_active.attr,
1669
	&dev_attr_resend_igmp.attr,
1670
	&dev_attr_min_links.attr,
1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682
	NULL,
};

static struct attribute_group bonding_group = {
	.name = "bonding",
	.attrs = per_bond_attrs,
};

/*
 * Initialize sysfs.  This sets up the bonding_masters file in
 * /sys/class/net.
 */
1683
int bond_create_sysfs(struct bond_net *bn)
1684
{
1685
	int ret;
1686

1687
	bn->class_attr_bonding_masters = class_attr_bonding_masters;
1688
	sysfs_attr_init(&bn->class_attr_bonding_masters.attr);
1689 1690

	ret = netdev_class_create_file(&bn->class_attr_bonding_masters);
1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702
	/*
	 * Permit multiple loads of the module by ignoring failures to
	 * create the bonding_masters sysfs file.  Bonding devices
	 * created by second or subsequent loads of the module will
	 * not be listed in, or controllable by, bonding_masters, but
	 * will have the usual "bonding" sysfs directory.
	 *
	 * This is done to preserve backwards compatibility for
	 * initscripts/sysconfig, which load bonding multiple times to
	 * configure multiple bonding devices.
	 */
	if (ret == -EEXIST) {
1703
		/* Is someone being kinky and naming a device bonding_master? */
1704
		if (__dev_get_by_name(bn->net,
1705
				      class_attr_bonding_masters.attr.name))
J
Joe Perches 已提交
1706
			pr_err("network device named %s already exists in sysfs",
1707
			       class_attr_bonding_masters.attr.name);
1708
		ret = 0;
1709
	}
1710 1711 1712 1713 1714 1715 1716 1717

	return ret;

}

/*
 * Remove /sys/class/net/bonding_masters.
 */
1718
void bond_destroy_sysfs(struct bond_net *bn)
1719
{
1720
	netdev_class_remove_file(&bn->class_attr_bonding_masters);
1721 1722 1723 1724 1725 1726
}

/*
 * Initialize sysfs for each bond.  This sets up and registers
 * the 'bondctl' directory for each individual bond under /sys/class/net.
 */
1727
void bond_prepare_sysfs_group(struct bonding *bond)
1728
{
1729
	bond->dev->sysfs_groups[0] = &bonding_group;
1730 1731
}