Logo Search packages:      
Sourcecode: linux version File versions  Download package

bond_sysfs.c

/*
 * 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.
 *
 */
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/device.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 <net/net_namespace.h>

/* #define BONDING_DEBUG 1 */
#include "bonding.h"
#define to_dev(obj)     container_of(obj,struct device,kobj)
#define to_bond(cd)     ((struct bonding *)(to_net_dev(cd)->priv))

/*---------------------------- Declarations -------------------------------*/


extern struct list_head bond_dev_list;
extern struct bond_params bonding_defaults;
extern struct bond_parm_tbl bond_mode_tbl[];
extern struct bond_parm_tbl bond_lacp_tbl[];
extern struct bond_parm_tbl xmit_hashtype_tbl[];
extern struct bond_parm_tbl arp_validate_tbl[];

static int expected_refcount = -1;
static struct class *netdev_class;
/*--------------------------- Data Structures -----------------------------*/

/* Bonding sysfs lock.  Why can't we just use the subsystem lock?
 * Because kobject_register tries to acquire the subsystem lock.  If
 * we already hold the lock (which we would if the user was creating
 * a new bond through the sysfs interface), we deadlock.
 * This lock is only needed when deleting a bond - we need to make sure
 * that we don't collide with an ongoing ioctl.
 */

struct rw_semaphore bonding_rwsem;




/*------------------------------ Functions --------------------------------*/

/*
 * "show" function for the bond_masters attribute.
 * The class parameter is ignored.
 */
static ssize_t bonding_show_bonds(struct class *cls, char *buf)
{
      int res = 0;
      struct bonding *bond;

      down_read(&(bonding_rwsem));

      list_for_each_entry(bond, &bond_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 */
      up_read(&(bonding_rwsem));
      return res;
}

/*
 * "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, const char *buffer, size_t count)
{
      char command[IFNAMSIZ + 1] = {0, };
      char *ifname;
      int rv, res = count;
      struct bonding *bond;
      struct bonding *nxt;

      sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
      ifname = command + 1;
      if ((strlen(command) <= 1) ||
          !dev_valid_name(ifname))
            goto err_no_cmd;

      if (command[0] == '+') {
            printk(KERN_INFO DRV_NAME
                  ": %s is being created...\n", ifname);
            rv = bond_create(ifname, &bonding_defaults, &bond);
            if (rv) {
                  printk(KERN_INFO DRV_NAME ": Bond creation failed.\n");
                  res = rv;
            }
            goto out;
      }

      if (command[0] == '-') {
            rtnl_lock();
            down_write(&bonding_rwsem);

            list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list)
                  if (strnicmp(bond->dev->name, ifname, IFNAMSIZ) == 0) {
                        /* check the ref count on the bond's kobject.
                         * If it's > expected, then there's a file open,
                         * and we have to fail.
                         */
                        if (atomic_read(&bond->dev->dev.kobj.kref.refcount)
                                          > expected_refcount){
                              printk(KERN_INFO DRV_NAME
                                    ": Unable remove bond %s due to open references.\n",
                                    ifname);
                              res = -EPERM;
                              goto out;
                        }
                        printk(KERN_INFO DRV_NAME
                              ": %s is being deleted...\n",
                              bond->dev->name);
                        bond_destroy(bond);
                        up_write(&bonding_rwsem);
                        rtnl_unlock();
                        goto out;
                  }

            printk(KERN_ERR DRV_NAME
                  ": unable to delete non-existent bond %s\n", ifname);
            res = -ENODEV;
            up_write(&bonding_rwsem);
            rtnl_unlock();
            goto out;
      }

err_no_cmd:
      printk(KERN_ERR DRV_NAME
            ": no command found in bonding_masters. Use +ifname or -ifname.\n");
      res = -EPERM;

      /* Always return either count or an error.  If you return 0, you'll
       * get called forever, which is bad.
       */
out:
      return res;
}
/* 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 function is largely the same flow as bonding_update_bonds().
 */
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 i, res, found, ret = count;
      u32 original_mtu;
      struct slave *slave;
      struct net_device *dev = NULL;
      struct bonding *bond = to_bond(d);

      /* Quick sanity check -- is the bond interface up? */
      if (!(bond->dev->flags & IFF_UP)) {
            printk(KERN_WARNING DRV_NAME
                   ": %s: doing slave updates when interface is down.\n",
                   bond->dev->name);
      }

      /* Note:  We can't hold bond->lock here, as bond_create grabs it. */

      rtnl_lock();
      down_write(&(bonding_rwsem));

      sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
      ifname = command + 1;
      if ((strlen(command) <= 1) ||
          !dev_valid_name(ifname))
            goto err_no_cmd;

      if (command[0] == '+') {

            /* Got a slave name in ifname.  Is it already in the list? */
            found = 0;
            read_lock(&bond->lock);
            bond_for_each_slave(bond, slave, i)
                  if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
                        printk(KERN_ERR DRV_NAME
                               ": %s: Interface %s is already enslaved!\n",
                               bond->dev->name, ifname);
                        ret = -EPERM;
                        read_unlock(&bond->lock);
                        goto out;
                  }

            read_unlock(&bond->lock);
            printk(KERN_INFO DRV_NAME ": %s: Adding slave %s.\n",
                   bond->dev->name, ifname);
            dev = dev_get_by_name(&init_net, ifname);
            if (!dev) {
                  printk(KERN_INFO DRV_NAME
                         ": %s: Interface %s does not exist!\n",
                         bond->dev->name, ifname);
                  ret = -EPERM;
                  goto out;
            }
            else
                  dev_put(dev);

            if (dev->flags & IFF_UP) {
                  printk(KERN_ERR DRV_NAME
                         ": %s: Error: Unable to enslave %s "
                         "because it is already up.\n",
                         bond->dev->name, dev->name);
                  ret = -EPERM;
                  goto out;
            }
            /* If this is the first slave, then we need to set
               the master's hardware address to be the same as the
               slave's. */
            if (!(*((u32 *) & (bond->dev->dev_addr[0])))) {
                  memcpy(bond->dev->dev_addr, dev->dev_addr,
                         dev->addr_len);
            }

            /* Set the slave's MTU to match the bond */
            original_mtu = dev->mtu;
            if (dev->mtu != bond->dev->mtu) {
                  if (dev->change_mtu) {
                        res = dev->change_mtu(dev,
                                          bond->dev->mtu);
                        if (res) {
                              ret = res;
                              goto out;
                        }
                  } else {
                        dev->mtu = bond->dev->mtu;
                  }
            }
            res = bond_enslave(bond->dev, dev);
            bond_for_each_slave(bond, slave, i)
                  if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0)
                        slave->original_mtu = original_mtu;
            if (res) {
                  ret = res;
            }
            goto out;
      }

      if (command[0] == '-') {
            dev = NULL;
            bond_for_each_slave(bond, slave, i)
                  if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
                        dev = slave->dev;
                        original_mtu = slave->original_mtu;
                        break;
                  }
            if (dev) {
                  printk(KERN_INFO DRV_NAME ": %s: Removing slave %s\n",
                        bond->dev->name, dev->name);
                  if (bond->setup_by_slave)
                        res = bond_release_and_destroy(bond->dev, dev);
                  else
                        res = bond_release(bond->dev, dev);
                  if (res) {
                        ret = res;
                        goto out;
                  }
                  /* set the slave MTU to the default */
                  if (dev->change_mtu) {
                        dev->change_mtu(dev, original_mtu);
                  } else {
                        dev->mtu = original_mtu;
                  }
            }
            else {
                  printk(KERN_ERR DRV_NAME ": unable to remove non-existent slave %s for bond %s.\n",
                        ifname, bond->dev->name);
                  ret = -ENODEV;
            }
            goto out;
      }

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

out:
      up_write(&(bonding_rwsem));
      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) {
            printk(KERN_ERR DRV_NAME
                   ": 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)  {
            printk(KERN_ERR DRV_NAME
                   ": %s: Ignoring invalid mode value %.*s.\n",
                   bond->dev->name,
                   (int)strlen(buf) - 1, buf);
            ret = -EINVAL;
            goto out;
      } else {
            if (bond->params.mode == BOND_MODE_8023AD)
                  bond_unset_master_3ad_flags(bond);

            if (bond->params.mode == BOND_MODE_ALB)
                  bond_unset_master_alb_flags(bond);

            bond->params.mode = new_value;
            bond_set_mode_ops(bond, bond->params.mode);
            printk(KERN_INFO DRV_NAME ": %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) {
            printk(KERN_ERR DRV_NAME
                   "%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)  {
            printk(KERN_ERR DRV_NAME
                   ": %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);
            printk(KERN_INFO DRV_NAME ": %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) {
            printk(KERN_ERR DRV_NAME
                   ": %s: Ignoring invalid arp_validate value %s\n",
                   bond->dev->name, buf);
            return -EINVAL;
      }
      if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
            printk(KERN_ERR DRV_NAME
                   ": %s: arp_validate only supported in active-backup mode.\n",
                   bond->dev->name);
            return -EINVAL;
      }
      printk(KERN_INFO DRV_NAME ": %s: setting arp_validate to %s (%d).\n",
             bond->dev->name, arp_validate_tbl[new_value].modename,
             new_value);

      if (!bond->params.arp_validate && new_value) {
            bond_register_arp(bond);
      } else if (bond->params.arp_validate && !new_value) {
            bond_unregister_arp(bond);
      }

      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, "%d\n", bond->params.fail_over_mac) + 1;
}

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

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

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

      if ((new_value == 0) || (new_value == 1)) {
            bond->params.fail_over_mac = new_value;
            printk(KERN_INFO DRV_NAME ": %s: Setting fail_over_mac to %d.\n",
                   bond->dev->name, new_value);
      } else {
            printk(KERN_INFO DRV_NAME
                   ": %s: Ignoring invalid fail_over_mac value %d.\n",
                   bond->dev->name, new_value);
      }
out:
      return ret;
}

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) {
            printk(KERN_ERR DRV_NAME
                   ": %s: no arp_interval value specified.\n",
                   bond->dev->name);
            ret = -EINVAL;
            goto out;
      }
      if (new_value < 0) {
            printk(KERN_ERR DRV_NAME
                   ": %s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
                   bond->dev->name, new_value, INT_MAX);
            ret = -EINVAL;
            goto out;
      }

      printk(KERN_INFO DRV_NAME
             ": %s: Setting ARP monitoring interval to %d.\n",
             bond->dev->name, new_value);
      bond->params.arp_interval = new_value;
      if (bond->params.miimon) {
            printk(KERN_INFO DRV_NAME
                   ": %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]) {
            printk(KERN_INFO DRV_NAME
                   ": %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, "%u.%u.%u.%u ",
                         NIPQUAD(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))) {
                  printk(KERN_ERR DRV_NAME
                         ": %s: invalid ARP target %u.%u.%u.%u specified for addition\n",
                         bond->dev->name, NIPQUAD(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); i++) {
                  if (targets[i] == newtarget) { /* duplicate */
                        printk(KERN_ERR DRV_NAME
                               ": %s: ARP target %u.%u.%u.%u is already present\n",
                               bond->dev->name, NIPQUAD(newtarget));
                        if (done)
                              targets[i] = 0;
                        ret = -EINVAL;
                        goto out;
                  }
                  if (targets[i] == 0 && !done) {
                        printk(KERN_INFO DRV_NAME
                               ": %s: adding ARP target %d.%d.%d.%d.\n",
                               bond->dev->name, NIPQUAD(newtarget));
                        done = 1;
                        targets[i] = newtarget;
                  }
            }
            if (!done) {
                  printk(KERN_ERR DRV_NAME
                         ": %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))) {
                  printk(KERN_ERR DRV_NAME
                         ": %s: invalid ARP target %d.%d.%d.%d specified for removal\n",
                         bond->dev->name, NIPQUAD(newtarget));
                  ret = -EINVAL;
                  goto out;
            }

            for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
                  if (targets[i] == newtarget) {
                        printk(KERN_INFO DRV_NAME
                               ": %s: removing ARP target %d.%d.%d.%d.\n",
                               bond->dev->name, NIPQUAD(newtarget));
                        targets[i] = 0;
                        done = 1;
                  }
            }
            if (!done) {
                  printk(KERN_INFO DRV_NAME
                         ": %s: unable to remove nonexistent ARP target %d.%d.%d.%d.\n",
                         bond->dev->name, NIPQUAD(newtarget));
                  ret = -EINVAL;
                  goto out;
            }
      }
      else {
            printk(KERN_ERR DRV_NAME ": 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)) {
            printk(KERN_ERR DRV_NAME
                   ": %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) {
            printk(KERN_ERR DRV_NAME
                   ": %s: no down delay value specified.\n",
                   bond->dev->name);
            ret = -EINVAL;
            goto out;
      }
      if (new_value < 0) {
            printk(KERN_ERR DRV_NAME
                   ": %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) {
                  printk(KERN_WARNING DRV_NAME
                         ": %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;
            printk(KERN_INFO DRV_NAME ": %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)) {
            printk(KERN_ERR DRV_NAME
                   ": %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) {
            printk(KERN_ERR DRV_NAME
                   ": %s: no up delay value specified.\n",
                   bond->dev->name);
            ret = -EINVAL;
            goto out;
      }
      if (new_value < 0) {
            printk(KERN_ERR DRV_NAME
                   ": %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) {
                  printk(KERN_WARNING DRV_NAME
                         ": %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;
            printk(KERN_INFO DRV_NAME ": %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) {
            printk(KERN_ERR DRV_NAME
                   ": %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) {
            printk(KERN_ERR DRV_NAME
                   ": %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;
            printk(KERN_INFO DRV_NAME
                   ": %s: Setting LACP rate to %s (%d).\n",
                   bond->dev->name, bond_lacp_tbl[new_value].modename, new_value);
      } else {
            printk(KERN_ERR DRV_NAME
                   ": %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);

/*
 * 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) {
            printk(KERN_ERR DRV_NAME
                   ": %s: no miimon value specified.\n",
                   bond->dev->name);
            ret = -EINVAL;
            goto out;
      }
      if (new_value < 0) {
            printk(KERN_ERR DRV_NAME
                   ": %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 {
            printk(KERN_INFO DRV_NAME
                   ": %s: Setting MII monitoring interval to %d.\n",
                   bond->dev->name, new_value);
            bond->params.miimon = new_value;
            if(bond->params.updelay)
                  printk(KERN_INFO DRV_NAME
                        ": %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)
                  printk(KERN_INFO DRV_NAME
                        ": %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) {
                  printk(KERN_INFO DRV_NAME
                         ": %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_unregister_arp(bond);
                        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);

      rtnl_lock();
      read_lock(&bond->lock);
      write_lock_bh(&bond->curr_slave_lock);

      if (!USES_PRIMARY(bond->params.mode)) {
            printk(KERN_INFO DRV_NAME
                   ": %s: Unable to set primary slave; %s is in mode %d\n",
                   bond->dev->name, bond->dev->name, bond->params.mode);
      } else {
            bond_for_each_slave(bond, slave, i) {
                  if (strnicmp
                      (slave->dev->name, buf,
                       strlen(slave->dev->name)) == 0) {
                        printk(KERN_INFO DRV_NAME
                               ": %s: Setting %s as primary slave.\n",
                               bond->dev->name, slave->dev->name);
                        bond->primary_slave = slave;
                        bond_select_active_slave(bond);
                        goto out;
                  }
            }

            /* if we got here, then we didn't match the name of any slave */

            if (strlen(buf) == 0 || buf[0] == '\n') {
                  printk(KERN_INFO DRV_NAME
                         ": %s: Setting primary slave to None.\n",
                         bond->dev->name);
                  bond->primary_slave = NULL;
                        bond_select_active_slave(bond);
            } else {
                  printk(KERN_INFO DRV_NAME
                         ": %s: Unable to set %.*s as primary slave as it is not a slave.\n",
                         bond->dev->name, (int)strlen(buf) - 1, buf);
            }
      }
out:
      write_unlock_bh(&bond->curr_slave_lock);
      read_unlock(&bond->lock);
      rtnl_unlock();

      return count;
}
static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR, bonding_show_primary, bonding_store_primary);

/*
 * 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) {
            printk(KERN_ERR DRV_NAME
                   ": %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;
            printk(KERN_INFO DRV_NAME ": %s: Setting use_carrier to %d.\n",
                   bond->dev->name, new_value);
      } else {
            printk(KERN_INFO DRV_NAME
                   ": %s: Ignoring invalid use_carrier value %d.\n",
                   bond->dev->name, new_value);
      }
out:
      return count;
}
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);

      rtnl_lock();
      read_lock(&bond->lock);
      write_lock_bh(&bond->curr_slave_lock);

      if (!USES_PRIMARY(bond->params.mode)) {
            printk(KERN_INFO DRV_NAME
                   ": %s: Unable to change active slave; %s is in mode %d\n",
                   bond->dev->name, bond->dev->name, bond->params.mode);
      } else {
            bond_for_each_slave(bond, slave, i) {
                  if (strnicmp
                      (slave->dev->name, buf,
                       strlen(slave->dev->name)) == 0) {
                        old_active = bond->curr_active_slave;
                        new_active = slave;
                        if (new_active == old_active) {
                              /* do nothing */
                              printk(KERN_INFO DRV_NAME
                                           ": %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)) {
                                    printk(KERN_INFO DRV_NAME
                                                  ": %s: Setting %s as active slave.\n",
                                              bond->dev->name, slave->dev->name);
                                    bond_change_active_slave(bond, new_active);
                              }
                              else {
                                    printk(KERN_INFO DRV_NAME
                                                  ": %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;
                        }
                  }
            }

            /* if we got here, then we didn't match the name of any slave */

            if (strlen(buf) == 0 || buf[0] == '\n') {
                  printk(KERN_INFO DRV_NAME
                         ": %s: Setting active slave to None.\n",
                         bond->dev->name);
                  bond->primary_slave = NULL;
                        bond_select_active_slave(bond);
            } else {
                  printk(KERN_INFO DRV_NAME
                         ": %s: Unable to set %.*s as active slave as it is not a slave.\n",
                         bond->dev->name, (int)strlen(buf) - 1, buf);
            }
      }
out:
      write_unlock_bh(&bond->curr_slave_lock);
      read_unlock(&bond->lock);
      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);
      DECLARE_MAC_BUF(mac);

      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,"%s\n",
                              print_mac(mac, ad_info.partner_system));
            }
      }

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



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_xmit_hash_policy.attr,
      &dev_attr_miimon.attr,
      &dev_attr_primary.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,
      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 = 0;
      struct bonding *firstbond;

      /* get the netdev class pointer */
      firstbond = container_of(bond_dev_list.next, struct bonding, bond_list);
      if (!firstbond)
            return -ENODEV;

      netdev_class = firstbond->dev->dev.class;
      if (!netdev_class)
            return -ENODEV;

      ret = class_create_file(netdev_class, &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) {
            netdev_class = NULL;
            return 0;
      }

      return ret;

}

/*
 * Remove /sys/class/net/bonding_masters.
 */
void bond_destroy_sysfs(void)
{
      if (netdev_class)
            class_remove_file(netdev_class, &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.
 */
int bond_create_sysfs_entry(struct bonding *bond)
{
      struct net_device *dev = bond->dev;
      int err;

      err = sysfs_create_group(&(dev->dev.kobj), &bonding_group);
      if (err) {
            printk(KERN_EMERG "eek! didn't create group!\n");
      }

      if (expected_refcount < 1)
            expected_refcount = atomic_read(&bond->dev->dev.kobj.kref.refcount);

      return err;
}
/*
 * Remove sysfs entries for each bond.
 */
void bond_destroy_sysfs_entry(struct bonding *bond)
{
      struct net_device *dev = bond->dev;

      sysfs_remove_group(&(dev->dev.kobj), &bonding_group);
}


Generated by  Doxygen 1.6.0   Back to index