text: /*
   * 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.
   *
   */
  
  #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  
  #include <linux/kernel.h>
  #include <linux/module.h>
  #include <linux/device.h>
  #include <linux/sched.h>
  #include <linux/sysdev.h>
  #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>
  #include <linux/etherdevice.h>
  #include <net/net_namespace.h>
  #include <net/netns/generic.h>
  #include <linux/nsproxy.h>
  
  #include "bonding.h"
  
  #define to_dev(obj)	container_of(obj, struct device, kobj)
  #define to_bond(cd)	((struct bonding *)(netdev_priv(to_net_dev(cd))))
  
  /*
   * "show" function for the bond_masters attribute.
   * The class parameter is ignored.
   */
  static ssize_t bonding_show_bonds(struct class *cls,
  				  struct class_attribute *attr,
  				  char *buf)
  {
  	struct net *net = current->nsproxy->net_ns;
  	struct bond_net *bn = net_generic(net, bond_net_id);
  	int res = 0;
  	struct bonding *bond;
  
  	rtnl_lock();
  
  	list_for_each_entry(bond, &bn->dev_list, bond_list) {
  		if (res > (PAGE_SIZE - IFNAMSIZ)) {
  			/* not enough space for another interface name */
  			if ((PAGE_SIZE - res) > 10)
  				res = PAGE_SIZE - 10;
  			res += sprintf(buf + res, "++more++ ");
  			break;
  		}
  		res += sprintf(buf + res, "%s ", bond->dev->name);
  	}
  	if (res)
  		buf[res-1] = '\n'; /* eat the leftover space */
  
  	rtnl_unlock();
  	return res;
  }
  
  static struct net_device *bond_get_by_name(struct net *net, const char *ifname)
  {
  	struct bond_net *bn = net_generic(net, bond_net_id);
  	struct bonding *bond;
  
  	list_for_each_entry(bond, &bn->dev_list, bond_list) {
  		if (strncmp(bond->dev->name, ifname, IFNAMSIZ) == 0)
  			return bond->dev;
  	}
  	return NULL;
  }
  
  /*
   * "store" function for the bond_masters attribute.  This is what
   * creates and deletes entire bonds.
   *
   * The class parameter is ignored.
   *
   */
  
  static ssize_t bonding_store_bonds(struct class *cls,
  				   struct class_attribute *attr,
  				   const char *buffer, size_t count)
  {
  	struct net *net = current->nsproxy->net_ns;
  	char command[IFNAMSIZ + 1] = {0, };
  	char *ifname;
  	int rv, res = count;
  
  	sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
  	ifname = command + 1;
  	if ((strlen(command) <= 1) ||
  	    !dev_valid_name(ifname))
  		goto err_no_cmd;
  
  	if (command[0] == '+') {
  		pr_info("%s is being created...\n", ifname);
  		rv = bond_create(net, ifname);
  		if (rv) {
  			if (rv == -EEXIST)
  				pr_info("%s already exists.\n", ifname);
  			else
  				pr_info("%s creation failed.\n", ifname);
  			res = rv;
  		}
  	} else if (command[0] == '-') {
  		struct net_device *bond_dev;
  
  		rtnl_lock();
  		bond_dev = bond_get_by_name(net, ifname);
  		if (bond_dev) {
  			pr_info("%s is being deleted...\n", ifname);
  			unregister_netdevice(bond_dev);
  		} else {
  			pr_err("unable to delete non-existent %s\n", ifname);
  			res = -ENODEV;
  		}
  		rtnl_unlock();
  	} else
  		goto err_no_cmd;
  
  	/* Always return either count or an error.  If you return 0, you'll
  	 * get called forever, which is bad.
  	 */
  	return res;
  
  err_no_cmd:
  	pr_err("no command found in bonding_masters. Use +ifname or -ifname.\n");
  	return -EPERM;
  }
  
  /* class attribute for bond_masters file.  This ends up in /sys/class/net */
  static CLASS_ATTR(bonding_masters,  S_IWUSR | S_IRUGO,
  		  bonding_show_bonds, bonding_store_bonds);
  
  int bond_create_slave_symlinks(struct net_device *master,
  			       struct net_device *slave)
  {
  	char linkname[IFNAMSIZ+7];
  	int ret = 0;
  
  	/* first, create a link from the slave back to the master */
  	ret = sysfs_create_link(&(slave->dev.kobj), &(master->dev.kobj),
  				"master");
  	if (ret)
  		return ret;
  	/* next, create a link from the master to the slave */
  	sprintf(linkname, "slave_%s", slave->name);
  	ret = sysfs_create_link(&(master->dev.kobj), &(slave->dev.kobj),
  				linkname);
  	return ret;
  
  }
  
  void bond_destroy_slave_symlinks(struct net_device *master,
  				 struct net_device *slave)
  {
  	char linkname[IFNAMSIZ+7];
  
  	sysfs_remove_link(&(slave->dev.kobj), "master");
  	sprintf(linkname, "slave_%s", slave->name);
  	sysfs_remove_link(&(master->dev.kobj), linkname);
  }
  
  
  /*
   * Show the slaves in the current bond.
   */
  static ssize_t bonding_show_slaves(struct device *d,
  				   struct device_attribute *attr, char *buf)
  {
  	struct slave *slave;
  	int i, res = 0;
  	struct bonding *bond = to_bond(d);
  
  	read_lock(&bond->lock);
  	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;
  			res += sprintf(buf + res, "++more++ ");
  			break;
  		}
  		res += sprintf(buf + res, "%s ", slave->dev->name);
  	}
  	read_unlock(&bond->lock);
  	if (res)
  		buf[res-1] = '\n'; /* eat the leftover space */
  	return res;
  }
  
  /*
   * Set the slaves in the current bond.  The bond interface must be
   * up for this to succeed.
   * This is supposed to be only thin wrapper for bond_enslave and bond_release.
   * All hard work should be done there.
   */
  static ssize_t bonding_store_slaves(struct device *d,
  				    struct device_attribute *attr,
  				    const char *buffer, size_t count)
  {
  	char command[IFNAMSIZ + 1] = { 0, };
  	char *ifname;
  	int res, ret = count;
  	struct net_device *dev;
  	struct bonding *bond = to_bond(d);
  
  	if (!rtnl_trylock())
  		return restart_syscall();
  
  	sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
  	ifname = command + 1;
  	if ((strlen(command) <= 1) ||
  	    !dev_valid_name(ifname))
  		goto err_no_cmd;
  
  	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;
  	}
  
  	switch (command[0]) {
  	case '+':
  		pr_info("%s: Adding slave %s.\n", bond->dev->name, dev->name);
  		res = bond_enslave(bond->dev, dev);
  		break;
  
  	case '-':
  		pr_info("%s: Removing slave %s.\n", bond->dev->name, dev->name);
  		res = bond_release(bond->dev, dev);
  		break;
  
  	default:
  		goto err_no_cmd;
  	}
  
  	if (res)
  		ret = res;
  	goto out;
  
  err_no_cmd:
  	pr_err("no command found in slaves file for bond %s. Use +ifname or -ifname.\n",
  	       bond->dev->name);
  	ret = -EPERM;
  
  out:
  	rtnl_unlock();
  	return ret;
  }
  
  static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves,
  		   bonding_store_slaves);
  
  /*
   * Show and set the bonding mode.  The bond interface must be down to
   * change the mode.
   */
  static ssize_t bonding_show_mode(struct device *d,
  				 struct device_attribute *attr, char *buf)
  {
  	struct bonding *bond = to_bond(d);
  
  	return sprintf(buf, "%s %d\n",
  			bond_mode_tbl[bond->params.mode].modename,
  			bond->params.mode);
  }
  
  static ssize_t bonding_store_mode(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) {
  		pr_err("unable to update mode of %s because interface is up.\n",
  		       bond->dev->name);
  		ret = -EPERM;
  		goto out;
  	}
  
  	new_value = bond_parse_parm(buf, bond_mode_tbl);
  	if (new_value < 0)  {
  		pr_err("%s: Ignoring invalid mode value %.*s.\n",
  		       bond->dev->name, (int)strlen(buf) - 1, buf);
  		ret = -EINVAL;
  		goto out;
  	}
  	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;
  	}
  
  	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);
  out:
  	return ret;
  }
  static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
  		   bonding_show_mode, bonding_store_mode);
  
  /*
   * Show and set the bonding transmit hash method.
   * The bond interface must be down to change the xmit hash policy.
   */
  static ssize_t bonding_show_xmit_hash(struct device *d,
  				      struct device_attribute *attr,
  				      char *buf)
  {
  	struct bonding *bond = to_bond(d);
  
  	return sprintf(buf, "%s %d\n",
  		       xmit_hashtype_tbl[bond->params.xmit_policy].modename,
  		       bond->params.xmit_policy);
  }
  
  static ssize_t bonding_store_xmit_hash(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) {
  		pr_err("%s: Interface is up. Unable to update xmit policy.\n",
  		       bond->dev->name);
  		ret = -EPERM;
  		goto out;
  	}
  
  	new_value = bond_parse_parm(buf, xmit_hashtype_tbl);
  	if (new_value < 0)  {
  		pr_err("%s: Ignoring invalid xmit hash policy value %.*s.\n",
  		       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);
  		pr_info("%s: setting xmit hash policy to %s (%d).\n",
  			bond->dev->name,
  			xmit_hashtype_tbl[new_value].modename, new_value);
  	}
  out:
  	return ret;
  }
  static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR,
  		   bonding_show_xmit_hash, bonding_store_xmit_hash);
  
  /*
   * Show and set arp_validate.
   */
  static ssize_t bonding_show_arp_validate(struct device *d,
  					 struct device_attribute *attr,
  					 char *buf)
  {
  	struct bonding *bond = to_bond(d);
  
  	return sprintf(buf, "%s %d\n",
  		       arp_validate_tbl[bond->params.arp_validate].modename,
  		       bond->params.arp_validate);
  }
  
  static ssize_t bonding_store_arp_validate(struct device *d,
  					  struct device_attribute *attr,
  					  const char *buf, size_t count)
  {
  	int new_value;
  	struct bonding *bond = to_bond(d);
  
  	new_value = bond_parse_parm(buf, arp_validate_tbl);
  	if (new_value < 0) {
  		pr_err("%s: Ignoring invalid arp_validate value %s\n",
  		       bond->dev->name, buf);
  		return -EINVAL;
  	}
  	if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
  		pr_err("%s: arp_validate only supported in active-backup mode.\n",
  		       bond->dev->name);
  		return -EINVAL;
  	}
  	pr_info("%s: setting arp_validate to %s (%d).\n",
  		bond->dev->name, arp_validate_tbl[new_value].modename,
  		new_value);
  
  	bond->params.arp_validate = new_value;
  
  	return count;
  }
  
  static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate,
  		   bonding_store_arp_validate);
  
  /*
   * Show and store fail_over_mac.  User only allowed to change the
   * value when there are no slaves.
   */
  static ssize_t bonding_show_fail_over_mac(struct device *d,
  					  struct device_attribute *attr,
  					  char *buf)
  {
  	struct bonding *bond = to_bond(d);
  
  	return sprintf(buf, "%s %d\n",
  		       fail_over_mac_tbl[bond->params.fail_over_mac].modename,
  		       bond->params.fail_over_mac);
  }
  
  static ssize_t bonding_store_fail_over_mac(struct device *d,
  					   struct device_attribute *attr,
  					   const char *buf, size_t count)
  {
  	int new_value;
  	struct bonding *bond = to_bond(d);
  
  	if (bond->slave_cnt != 0) {
  		pr_err("%s: Can't alter fail_over_mac with slaves in bond.\n",
  		       bond->dev->name);
  		return -EPERM;
  	}
  
  	new_value = bond_parse_parm(buf, fail_over_mac_tbl);
  	if (new_value < 0) {
  		pr_err("%s: Ignoring invalid fail_over_mac value %s.\n",
  		       bond->dev->name, buf);
  		return -EINVAL;
  	}
  
  	bond->params.fail_over_mac = new_value;
  	pr_info("%s: Setting fail_over_mac to %s (%d).\n",
  		bond->dev->name, fail_over_mac_tbl[new_value].modename,
  		new_value);
  
  	return count;
  }
  
  static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR,
  		   bonding_show_fail_over_mac, bonding_store_fail_over_mac);
  
  /*
   * 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.
   */
  static ssize_t bonding_show_arp_interval(struct device *d,
  					 struct device_attribute *attr,
  					 char *buf)
  {
  	struct bonding *bond = to_bond(d);
  
  	return sprintf(buf, "%d\n", bond->params.arp_interval);
  }
  
  static ssize_t bonding_store_arp_interval(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 (sscanf(buf, "%d", &new_value) != 1) {
  		pr_err("%s: no arp_interval value specified.\n",
  		       bond->dev->name);
  		ret = -EINVAL;
  		goto out;
  	}
  	if (new_value < 0) {
  		pr_err("%s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
  		       bond->dev->name, new_value, INT_MAX);
  		ret = -EINVAL;
  		goto out;
  	}
  	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;
  	}
  	pr_info("%s: Setting ARP monitoring interval to %d.\n",
  		bond->dev->name, new_value);
  	bond->params.arp_interval = new_value;
  	if (bond->params.miimon) {
  		pr_info("%s: ARP monitoring cannot be used with MII monitoring. %s Disabling MII monitoring.\n",
  			bond->dev->name, bond->dev->name);
  		bond->params.miimon = 0;
  		if (delayed_work_pending(&bond->mii_work)) {
  			cancel_delayed_work(&bond->mii_work);
  			flush_workqueue(bond->wq);
  		}
  	}
  	if (!bond->params.arp_targets[0]) {
  		pr_info("%s: ARP monitoring has been set up, but no ARP targets have been specified.\n",
  			bond->dev->name);
  	}
  	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.
  		 */
  		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);
  		}
  	}
  
  out:
  	return ret;
  }
  static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR,
  		   bonding_show_arp_interval, bonding_store_arp_interval);
  
  /*
   * Show and set the arp targets.
   */
  static ssize_t bonding_show_arp_targets(struct device *d,
  					struct device_attribute *attr,
  					char *buf)
  {
  	int i, res = 0;
  	struct bonding *bond = to_bond(d);
  
  	for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
  		if (bond->params.arp_targets[i])
  			res += sprintf(buf + res, "%pI4 ",
  				       &bond->params.arp_targets[i]);
  	}
  	if (res)
  		buf[res-1] = '\n'; /* eat the leftover space */
  	return res;
  }
  
  static ssize_t bonding_store_arp_targets(struct device *d,
  					 struct device_attribute *attr,
  					 const char *buf, size_t count)
  {
  	__be32 newtarget;
  	int i = 0, done = 0, ret = count;
  	struct bonding *bond = to_bond(d);
  	__be32 *targets;
  
  	targets = bond->params.arp_targets;
  	newtarget = in_aton(buf + 1);
  	/* look for adds */
  	if (buf[0] == '+') {
  		if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
  			pr_err("%s: invalid ARP target %pI4 specified for addition\n",
  			       bond->dev->name, &newtarget);
  			ret = -EINVAL;
  			goto out;
  		}
  		/* look for an empty slot to put the target in, and check for dupes */
  		for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
  			if (targets[i] == newtarget) { /* duplicate */
  				pr_err("%s: ARP target %pI4 is already present\n",
  				       bond->dev->name, &newtarget);
  				ret = -EINVAL;
  				goto out;
  			}
  			if (targets[i] == 0) {
  				pr_info("%s: adding ARP target %pI4.\n",
  					bond->dev->name, &newtarget);
  				done = 1;
  				targets[i] = newtarget;
  			}
  		}
  		if (!done) {
  			pr_err("%s: ARP target table is full!\n",
  			       bond->dev->name);
  			ret = -EINVAL;
  			goto out;
  		}
  
  	} else if (buf[0] == '-')	{
  		if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
  			pr_err("%s: invalid ARP target %pI4 specified for removal\n",
  			       bond->dev->name, &newtarget);
  			ret = -EINVAL;
  			goto out;
  		}
  
  		for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
  			if (targets[i] == newtarget) {
  				int j;
  				pr_info("%s: removing ARP target %pI4.\n",
  					bond->dev->name, &newtarget);
  				for (j = i; (j < (BOND_MAX_ARP_TARGETS-1)) && targets[j+1]; j++)
  					targets[j] = targets[j+1];
  
  				targets[j] = 0;
  				done = 1;
  			}
  		}
  		if (!done) {
  			pr_info("%s: unable to remove nonexistent ARP target %pI4.\n",
  				bond->dev->name, &newtarget);
  			ret = -EINVAL;
  			goto out;
  		}
  	} else {
  		pr_err("no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
  		       bond->dev->name);
  		ret = -EPERM;
  		goto out;
  	}
  
  out:
  	return ret;
  }
  static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
  
  /*
   * 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.
   */
  static ssize_t bonding_show_downdelay(struct device *d,
  				      struct device_attribute *attr,
  				      char *buf)
  {
  	struct bonding *bond = to_bond(d);
  
  	return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
  }
  
  static ssize_t bonding_store_downdelay(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->params.miimon)) {
  		pr_err("%s: Unable to set down delay as MII monitoring is disabled\n",
  		       bond->dev->name);
  		ret = -EPERM;
  		goto out;
  	}
  
  	if (sscanf(buf, "%d", &new_value) != 1) {
  		pr_err("%s: no down delay value specified.\n", bond->dev->name);
  		ret = -EINVAL;
  		goto out;
  	}
  	if (new_value < 0) {
  		pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
  		       bond->dev->name, new_value, 1, INT_MAX);
  		ret = -EINVAL;
  		goto out;
  	} else {
  		if ((new_value % bond->params.miimon) != 0) {
  			pr_warning("%s: Warning: down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
  				   bond->dev->name, new_value,
  				   bond->params.miimon,
  				   (new_value / bond->params.miimon) *
  				   bond->params.miimon);
  		}
  		bond->params.downdelay = new_value / bond->params.miimon;
  		pr_info("%s: Setting down delay to %d.\n",
  			bond->dev->name,
  			bond->params.downdelay * bond->params.miimon);
  
  	}
  
  out:
  	return ret;
  }
  static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR,
  		   bonding_show_downdelay, bonding_store_downdelay);
  
  static ssize_t bonding_show_updelay(struct device *d,
  				    struct device_attribute *attr,
  				    char *buf)
  {
  	struct bonding *bond = to_bond(d);
  
  	return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
  
  }
  
  static ssize_t bonding_store_updelay(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->params.miimon)) {
  		pr_err("%s: Unable to set up delay as MII monitoring is disabled\n",
  		       bond->dev->name);
  		ret = -EPERM;
  		goto out;
  	}
  
  	if (sscanf(buf, "%d", &new_value) != 1) {
  		pr_err("%s: no up delay value specified.\n",
  		       bond->dev->name);
  		ret = -EINVAL;
  		goto out;
  	}
  	if (new_value < 0) {
  		pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
  		       bond->dev->name, new_value, 1, INT_MAX);
  		ret = -EINVAL;
  		goto out;
  	} else {
  		if ((new_value % bond->params.miimon) != 0) {
  			pr_warning("%s: Warning: up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
  				   bond->dev->name, new_value,
  				   bond->params.miimon,
  				   (new_value / bond->params.miimon) *
  				   bond->params.miimon);
  		}
  		bond->params.updelay = new_value / bond->params.miimon;
  		pr_info("%s: Setting up delay to %d.\n",
  			bond->dev->name,
  			bond->params.updelay * bond->params.miimon);
  	}
  
  out:
  	return ret;
  }
  static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR,
  		   bonding_show_updelay, bonding_store_updelay);
  
  /*
   * Show and set the LACP interval.  Interface must be down, and the mode
   * must be set to 802.3ad mode.
   */
  static ssize_t bonding_show_lacp(struct device *d,
  				 struct device_attribute *attr,
  				 char *buf)
  {
  	struct bonding *bond = to_bond(d);
  
  	return sprintf(buf, "%s %d\n",
  		bond_lacp_tbl[bond->params.lacp_fast].modename,
  		bond->params.lacp_fast);
  }
  
  static ssize_t bonding_store_lacp(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) {
  		pr_err("%s: Unable to update LACP rate because interface is up.\n",
  		       bond->dev->name);
  		ret = -EPERM;
  		goto out;
  	}
  
  	if (bond->params.mode != BOND_MODE_8023AD) {
  		pr_err("%s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
  		       bond->dev->name);
  		ret = -EPERM;
  		goto out;
  	}
  
  	new_value = bond_parse_parm(buf, bond_lacp_tbl);
  
  	if ((new_value == 1) || (new_value == 0)) {
  		bond->params.lacp_fast = new_value;
  		pr_info("%s: Setting LACP rate to %s (%d).\n",
  			bond->dev->name, bond_lacp_tbl[new_value].modename,
  			new_value);
  	} else {
  		pr_err("%s: Ignoring invalid LACP rate value %.*s.\n",
  		       bond->dev->name, (int)strlen(buf) - 1, buf);
  		ret = -EINVAL;
  	}
  out:
  	return ret;
  }
  static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR,
  		   bonding_show_lacp, bonding_store_lacp);
  
  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) {
  		pr_err("%s: Unable to update ad_select because interface is up.\n",
  		       bond->dev->name);
  		ret = -EPERM;
  		goto out;
  	}
  
  	new_value = bond_parse_parm(buf, ad_select_tbl);
  
  	if (new_value != -1) {
  		bond->params.ad_select = new_value;
  		pr_info("%s: Setting ad_select to %s (%d).\n",
  			bond->dev->name, ad_select_tbl[new_value].modename,
  			new_value);
  	} else {
  		pr_err("%s: Ignoring invalid ad_select value %.*s.\n",
  		       bond->dev->name, (int)strlen(buf) - 1, buf);
  		ret = -EINVAL;
  	}
  out:
  	return ret;
  }
  static DEVICE_ATTR(ad_select, S_IRUGO | S_IWUSR,
  		   bonding_show_ad_select, bonding_store_ad_select);
  
  /*
   * 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);
  
  /*
   * 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.
   */
  static ssize_t bonding_show_miimon(struct device *d,
  				   struct device_attribute *attr,
  				   char *buf)
  {
  	struct bonding *bond = to_bond(d);
  
  	return sprintf(buf, "%d\n", bond->params.miimon);
  }
  
  static ssize_t bonding_store_miimon(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 (sscanf(buf, "%d", &new_value) != 1) {
  		pr_err("%s: no miimon value specified.\n",
  		       bond->dev->name);
  		ret = -EINVAL;
  		goto out;
  	}
  	if (new_value < 0) {
  		pr_err("%s: Invalid miimon value %d not in range %d-%d; rejected.\n",
  		       bond->dev->name, new_value, 1, INT_MAX);
  		ret = -EINVAL;
  		goto out;
  	} else {
  		pr_info("%s: Setting MII monitoring interval to %d.\n",
  			bond->dev->name, new_value);
  		bond->params.miimon = new_value;
  		if (bond->params.updelay)
  			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);
  		if (bond->params.downdelay)
  			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);
  		if (bond->params.arp_interval) {
  			pr_info("%s: MII monitoring cannot be used with ARP monitoring. Disabling ARP monitoring...\n",
  				bond->dev->name);
  			bond->params.arp_interval = 0;
  			if (bond->params.arp_validate) {
  				bond->params.arp_validate =
  					BOND_ARP_VALIDATE_NONE;
  			}
  			if (delayed_work_pending(&bond->arp_work)) {
  				cancel_delayed_work(&bond->arp_work);
  				flush_workqueue(bond->wq);
  			}
  		}
  
  		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.
  			 */
  			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);
  			}
  		}
  	}
  out:
  	return ret;
  }
  static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR,
  		   bonding_show_miimon, bonding_store_miimon);
  
  /*
   * 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.
   */
  static ssize_t bonding_show_primary(struct device *d,
  				    struct device_attribute *attr,
  				    char *buf)
  {
  	int count = 0;
  	struct bonding *bond = to_bond(d);
  
  	if (bond->primary_slave)
  		count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
  
  	return count;
  }
  
  static ssize_t bonding_store_primary(struct device *d,
  				     struct device_attribute *attr,
  				     const char *buf, size_t count)
  {
  	int i;
  	struct slave *slave;
  	struct bonding *bond = to_bond(d);
  	char ifname[IFNAMSIZ];
  
  	if (!rtnl_trylock())
  		return restart_syscall();
  	block_netpoll_tx();
  	read_lock(&bond->lock);
  	write_lock_bh(&bond->curr_slave_lock);
  
  	if (!USES_PRIMARY(bond->params.mode)) {
  		pr_info("%s: Unable to set primary slave; %s is in mode %d\n",
  			bond->dev->name, bond->dev->name, bond->params.mode);
  		goto out;
  	}
  
  	sscanf(buf, "%16s", ifname); /* IFNAMSIZ */
  
  	/* 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;
  		}
  	}
  
  	pr_info("%s: Unable to set %.*s as primary slave.\n",
  		bond->dev->name, (int)strlen(buf) - 1, buf);
  out:
  	write_unlock_bh(&bond->curr_slave_lock);
  	read_unlock(&bond->lock);
  	unblock_netpoll_tx();
  	rtnl_unlock();
  
  	return count;
  }
  static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR,
  		   bonding_show_primary, bonding_store_primary);
  
  /*
   * 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)  {
  		pr_err("%s: Ignoring invalid primary_reselect value %.*s.\n",
  		       bond->dev->name,
  		       (int) strlen(buf) - 1, buf);
  		ret = -EINVAL;
  		goto out;
  	}
  
  	bond->params.primary_reselect = new_value;
  	pr_info("%s: setting primary_reselect to %s (%d).\n",
  		bond->dev->name, pri_reselect_tbl[new_value].modename,
  		new_value);
  
  	block_netpoll_tx();
  	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);
  	unblock_netpoll_tx();
  out:
  	rtnl_unlock();
  	return ret;
  }
  static DEVICE_ATTR(primary_reselect, S_IRUGO | S_IWUSR,
  		   bonding_show_primary_reselect,
  		   bonding_store_primary_reselect);
  
  /*
   * Show and set the use_carrier flag.
   */
  static ssize_t bonding_show_carrier(struct device *d,
  				    struct device_attribute *attr,
  				    char *buf)
  {
  	struct bonding *bond = to_bond(d);
  
  	return sprintf(buf, "%d\n", bond->params.use_carrier);
  }
  
  static ssize_t bonding_store_carrier(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 (sscanf(buf, "%d", &new_value) != 1) {
  		pr_err("%s: no use_carrier value specified.\n",
  		       bond->dev->name);
  		ret = -EINVAL;
  		goto out;
  	}
  	if ((new_value == 0) || (new_value == 1)) {
  		bond->params.use_carrier = new_value;
  		pr_info("%s: Setting use_carrier to %d.\n",
  			bond->dev->name, new_value);
  	} else {
  		pr_info("%s: Ignoring invalid use_carrier value %d.\n",
  			bond->dev->name, new_value);
  	}
  out:
  	return ret;
  }
  static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR,
  		   bonding_show_carrier, bonding_store_carrier);
  
  
  /*
   * Show and set currently active_slave.
   */
  static ssize_t bonding_show_active_slave(struct device *d,
  					 struct device_attribute *attr,
  					 char *buf)
  {
  	struct slave *curr;
  	struct bonding *bond = to_bond(d);
  	int count = 0;
  
  	read_lock(&bond->curr_slave_lock);
  	curr = bond->curr_active_slave;
  	read_unlock(&bond->curr_slave_lock);
  
  	if (USES_PRIMARY(bond->params.mode) && curr)
  		count = sprintf(buf, "%s\n", curr->dev->name);
  	return count;
  }
  
  static ssize_t bonding_store_active_slave(struct device *d,
  					  struct device_attribute *attr,
  					  const char *buf, size_t count)
  {
  	int i;
  	struct slave *slave;
  	struct slave *old_active = NULL;
  	struct slave *new_active = NULL;
  	struct bonding *bond = to_bond(d);
  	char ifname[IFNAMSIZ];
  
  	if (!rtnl_trylock())
  		return restart_syscall();
  
  	block_netpoll_tx();
  	read_lock(&bond->lock);
  	write_lock_bh(&bond->curr_slave_lock);
  
  	if (!USES_PRIMARY(bond->params.mode)) {
  		pr_info("%s: Unable to change active slave; %s is in mode %d\n",
  			bond->dev->name, bond->dev->name, bond->params.mode);
  		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",
  						bond->dev->name,
  						slave->dev->name);
  					bond_change_active_slave(bond,
  								 new_active);
  				}
  				else {
  					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);
  				}
  				goto out;
  			}
  		}
  	}
  
  	pr_info("%s: Unable to set %.*s as active slave.\n",
  		bond->dev->name, (int)strlen(buf) - 1, buf);
   out:
  	write_unlock_bh(&bond->curr_slave_lock);
  	read_unlock(&bond->lock);
  	unblock_netpoll_tx();
  
  	rtnl_unlock();
  
  	return count;
  
  }
  static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR,
  		   bonding_show_active_slave, bonding_store_active_slave);
  
  
  /*
   * Show link status of the bond interface.
   */
  static ssize_t bonding_show_mii_status(struct device *d,
  				       struct device_attribute *attr,
  				       char *buf)
  {
  	struct slave *curr;
  	struct bonding *bond = to_bond(d);
  
  	read_lock(&bond->curr_slave_lock);
  	curr = bond->curr_active_slave;
  	read_unlock(&bond->curr_slave_lock);
  
  	return sprintf(buf, "%s\n", curr ? "up" : "down");
  }
  static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
  
  
  /*
   * Show current 802.3ad aggregator ID.
   */
  static ssize_t bonding_show_ad_aggregator(struct device *d,
  					  struct device_attribute *attr,
  					  char *buf)
  {
  	int count = 0;
  	struct bonding *bond = to_bond(d);
  
  	if (bond->params.mode == BOND_MODE_8023AD) {
  		struct ad_info ad_info;
  		count = sprintf(buf, "%d\n",
  				(bond_3ad_get_active_agg_info(bond, &ad_info))
  				?  0 : ad_info.aggregator_id);
  	}
  
  	return count;
  }
  static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
  
  
  /*
   * Show number of active 802.3ad ports.
   */
  static ssize_t bonding_show_ad_num_ports(struct device *d,
  					 struct device_attribute *attr,
  					 char *buf)
  {
  	int count = 0;
  	struct bonding *bond = to_bond(d);
  
  	if (bond->params.mode == BOND_MODE_8023AD) {
  		struct ad_info ad_info;
  		count = sprintf(buf, "%d\n",
  				(bond_3ad_get_active_agg_info(bond, &ad_info))
  				?  0 : ad_info.ports);
  	}
  
  	return count;
  }
  static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
  
  
  /*
   * Show current 802.3ad actor key.
   */
  static ssize_t bonding_show_ad_actor_key(struct device *d,
  					 struct device_attribute *attr,
  					 char *buf)
  {
  	int count = 0;
  	struct bonding *bond = to_bond(d);
  
  	if (bond->params.mode == BOND_MODE_8023AD) {
  		struct ad_info ad_info;
  		count = sprintf(buf, "%d\n",
  				(bond_3ad_get_active_agg_info(bond, &ad_info))
  				?  0 : ad_info.actor_key);
  	}
  
  	return count;
  }
  static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
  
  
  /*
   * Show current 802.3ad partner key.
   */
  static ssize_t bonding_show_ad_partner_key(struct device *d,
  					   struct device_attribute *attr,
  					   char *buf)
  {
  	int count = 0;
  	struct bonding *bond = to_bond(d);
  
  	if (bond->params.mode == BOND_MODE_8023AD) {
  		struct ad_info ad_info;
  		count = sprintf(buf, "%d\n",
  				(bond_3ad_get_active_agg_info(bond, &ad_info))
  				?  0 : ad_info.partner_key);
  	}
  
  	return count;
  }
  static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
  
  
  /*
   * Show current 802.3ad partner mac.
   */
  static ssize_t bonding_show_ad_partner_mac(struct device *d,
  					   struct device_attribute *attr,
  					   char *buf)
  {
  	int count = 0;
  	struct bonding *bond = to_bond(d);
  
  	if (bond->params.mode == BOND_MODE_8023AD) {
  		struct ad_info ad_info;
  		if (!bond_3ad_get_active_agg_info(bond, &ad_info))
  			count = sprintf(buf, "%pM\n", ad_info.partner_system);
  	}
  
  	return count;
  }
  static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
  
  /*
   * 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) {
  		if (res > (PAGE_SIZE - IFNAMSIZ - 6)) {
  			/* not enough space for another interface_name:queue_id pair */
  			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) ||
  	    qid > bond->params.tx_queues)
  		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);
  
  
  /*
   * 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;
  	}
  
  	bond_for_each_slave(bond, slave, i) {
  		if (!bond_is_active_slave(slave)) {
  			if (new_value)
  				slave->inactive = 0;
  			else
  				slave->inactive = 1;
  		}
  	}
  out:
  	return ret;
  }
  static DEVICE_ATTR(all_slaves_active, S_IRUGO | S_IWUSR,
  		   bonding_show_slaves_active, bonding_store_slaves_active);
  
  /*
   * Show and set the number of IGMP membership reports to send on link failure
   */
  static ssize_t bonding_show_resend_igmp(struct device *d,
  					struct device_attribute *attr,
  					char *buf)
  {
  	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,
  					 struct device_attribute *attr,
  					 const char *buf, size_t count)
  {
  	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;
  	}
  
  	if (new_value < 0 || new_value > 255) {
  		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);
  
  static struct attribute *per_bond_attrs[] = {
  	&dev_attr_slaves.attr,
  	&dev_attr_mode.attr,
  	&dev_attr_fail_over_mac.attr,
  	&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,
  	&dev_attr_ad_select.attr,
  	&dev_attr_xmit_hash_policy.attr,
  	&dev_attr_num_grat_arp.attr,
  	&dev_attr_num_unsol_na.attr,
  	&dev_attr_miimon.attr,
  	&dev_attr_primary.attr,
  	&dev_attr_primary_reselect.attr,
  	&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,
  	&dev_attr_queue_id.attr,
  	&dev_attr_all_slaves_active.attr,
  	&dev_attr_resend_igmp.attr,
  	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.
   */
  int bond_create_sysfs(void)
  {
  	int ret;
  
  	ret = netdev_class_create_file(&class_attr_bonding_masters);
  	/*
  	 * 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) {
  		/* Is someone being kinky and naming a device bonding_master? */
  		if (__dev_get_by_name(&init_net,
  				      class_attr_bonding_masters.attr.name))
  			pr_err("network device named %s already exists in sysfs",
  			       class_attr_bonding_masters.attr.name);
  		ret = 0;
  	}
  
  	return ret;
  
  }
  
  /*
   * Remove /sys/class/net/bonding_masters.
   */
  void bond_destroy_sysfs(void)
  {
  	netdev_class_remove_file(&class_attr_bonding_masters);
  }
  
  /*
   * Initialize sysfs for each bond.  This sets up and registers
   * the 'bondctl' directory for each individual bond under /sys/class/net.
   */
  void bond_prepare_sysfs_group(struct bonding *bond)
  {
  	bond->dev->sysfs_groups[0] = &bonding_group;
  }
  
  