patch-2.4.15 linux/drivers/net/bonding.c
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- Lines: 2178
- Date:
Tue Nov 13 09:19:41 2001
- Orig file:
v2.4.14/linux/drivers/net/bonding.c
- Orig date:
Tue Oct 9 17:06:51 2001
diff -u --recursive --new-file v2.4.14/linux/drivers/net/bonding.c linux/drivers/net/bonding.c
@@ -4,11 +4,14 @@
* Copyright 1999, Thomas Davis, tadavis@lbl.gov.
* Licensed under the GPL. Based on dummy.c, and eql.c devices.
*
- * bond.c: a bonding/etherchannel/sun trunking net driver
+ * bonding.c: an Ethernet Bonding driver
*
- * This is useful to talk to a Cisco 5500, running Etherchannel, aka:
- * Linux Channel Bonding
+ * This is useful to talk to a Cisco EtherChannel compatible equipment:
+ * Cisco 5500
* Sun Trunking (Solaris)
+ * Alteon AceDirector Trunks
+ * Linux Bonding
+ * and probably many L2 switches ...
*
* How it works:
* ifconfig bond0 ipaddress netmask up
@@ -21,280 +24,2019 @@
* will release all slaves, marking them as down.
*
* ifenslave bond0 eth0
- * will attache eth0 to bond0 as a slave. eth0 hw mac address will either
+ * will attach eth0 to bond0 as a slave. eth0 hw mac address will either
* a: be used as initial mac address
* b: if a hw mac address already is there, eth0's hw mac address
- * will then be set from bond0.
+ * will then be set from bond0.
*
* v0.1 - first working version.
* v0.2 - changed stats to be calculated by summing slaves stats.
+ *
+ * Changes:
+ * Arnaldo Carvalho de Melo <acme@conectiva.com.br>
+ * - fix leaks on failure at bond_init
+ *
+ * 2000/09/30 - Willy Tarreau <willy at meta-x.org>
+ * - added trivial code to release a slave device.
+ * - fixed security bug (CAP_NET_ADMIN not checked)
+ * - implemented MII link monitoring to disable dead links :
+ * All MII capable slaves are checked every <miimon> milliseconds
+ * (100 ms seems good). This value can be changed by passing it to
+ * insmod. A value of zero disables the monitoring (default).
+ * - fixed an infinite loop in bond_xmit_roundrobin() when there's no
+ * good slave.
+ * - made the code hopefully SMP safe
+ *
+ * 2000/10/03 - Willy Tarreau <willy at meta-x.org>
+ * - optimized slave lists based on relevant suggestions from Thomas Davis
+ * - implemented active-backup method to obtain HA with two switches:
+ * stay as long as possible on the same active interface, while we
+ * also monitor the backup one (MII link status) because we want to know
+ * if we are able to switch at any time. ( pass "mode=1" to insmod )
+ * - lots of stress testings because we need it to be more robust than the
+ * wires ! :->
+ *
+ * 2000/10/09 - Willy Tarreau <willy at meta-x.org>
+ * - added up and down delays after link state change.
+ * - optimized the slaves chaining so that when we run forward, we never
+ * repass through the bond itself, but we can find it by searching
+ * backwards. Renders the deletion more difficult, but accelerates the
+ * scan.
+ * - smarter enslaving and releasing.
+ * - finer and more robust SMP locking
+ *
+ * 2000/10/17 - Willy Tarreau <willy at meta-x.org>
+ * - fixed two potential SMP race conditions
+ *
+ * 2000/10/18 - Willy Tarreau <willy at meta-x.org>
+ * - small fixes to the monitoring FSM in case of zero delays
+ * 2000/11/01 - Willy Tarreau <willy at meta-x.org>
+ * - fixed first slave not automatically used in trunk mode.
+ * 2000/11/10 : spelling of "EtherChannel" corrected.
+ * 2000/11/13 : fixed a race condition in case of concurrent accesses to ioctl().
+ * 2000/12/16 : fixed improper usage of rtnl_exlock_nowait().
+ *
+ * 2001/1/3 - Chad N. Tindel <ctindel at ieee dot org>
+ * - The bonding driver now simulates MII status monitoring, just like
+ * a normal network device. It will show that the link is down iff
+ * every slave in the bond shows that their links are down. If at least
+ * one slave is up, the bond's MII status will appear as up.
+ *
+ * 2001/2/7 - Chad N. Tindel <ctindel at ieee dot org>
+ * - Applications can now query the bond from user space to get
+ * information which may be useful. They do this by calling
+ * the BOND_INFO_QUERY ioctl. Once the app knows how many slaves
+ * are in the bond, it can call the BOND_SLAVE_INFO_QUERY ioctl to
+ * get slave specific information (# link failures, etc). See
+ * <linux/if_bonding.h> for more details. The structs of interest
+ * are ifbond and ifslave.
+ *
+ * 2001/4/5 - Chad N. Tindel <ctindel at ieee dot org>
+ * - Ported to 2.4 Kernel
*
+ * 2001/5/2 - Jeffrey E. Mast <jeff at mastfamily dot com>
+ * - When a device is detached from a bond, the slave device is no longer
+ * left thinking that is has a master.
+ *
+ * 2001/5/16 - Jeffrey E. Mast <jeff at mastfamily dot com>
+ * - memset did not appropriately initialized the bond rw_locks. Used
+ * rwlock_init to initialize to unlocked state to prevent deadlock when
+ * first attempting a lock
+ * - Called SET_MODULE_OWNER for bond device
+ *
+ * 2001/5/17 - Tim Anderson <tsa at mvista.com>
+ * - 2 paths for releasing for slave release; 1 through ioctl
+ * and 2) through close. Both paths need to release the same way.
+ * - the free slave in bond release is changing slave status before
+ * the free. The netdev_set_master() is intended to change slave state
+ * so it should not be done as part of the release process.
+ * - Simple rule for slave state at release: only the active in A/B and
+ * only one in the trunked case.
+ *
+ * 2001/6/01 - Tim Anderson <tsa at mvista.com>
+ * - Now call dev_close when releasing a slave so it doesn't screw up
+ * out routing table.
+ *
+ * 2001/6/01 - Chad N. Tindel <ctindel at ieee dot org>
+ * - Added /proc support for getting bond and slave information.
+ * Information is in /proc/net/<bond device>/info.
+ * - Changed the locking when calling bond_close to prevent deadlock.
+ *
+ * 2001/8/05 - Janice Girouard <girouard at us.ibm.com>
+ * - correct problem where refcnt of slave is not incremented in bond_ioctl
+ * so the system hangs when halting.
+ * - correct locking problem when unable to malloc in bond_enslave.
+ * - adding bond_xmit_xor logic.
+ * - adding multiple bond device support.
+ *
+ * 2001/8/13 - Erik Habbinga <erik_habbinga at hp dot com>
+ * - correct locking problem with rtnl_exlock_nowait
+ *
+ * 2001/8/23 - Janice Girouard <girouard at us.ibm.com>
+ * - bzero initial dev_bonds, to correct oops
+ * - convert SIOCDEVPRIVATE to new MII ioctl calls
+ *
+ * 2001/9/13 - Takao Indoh <indou dot takao at jp dot fujitsu dot com>
+ * - Add the BOND_CHANGE_ACTIVE ioctl implementation
+ *
+ * 2001/9/14 - Mark Huth <mhuth at mvista dot com>
+ * - Change MII_LINK_READY to not check for end of auto-negotiation,
+ * but only for an up link.
+ *
+ * 2001/9/20 - Chad N. Tindel <ctindel at ieee dot org>
+ * - Add the device field to bonding_t. Previously the net_device
+ * corresponding to a bond wasn't available from the bonding_t
+ * structure.
+ *
+ * 2001/9/25 - Janice Girouard <girouard at us.ibm.com>
+ * - add arp_monitor for active backup mode
+ *
+ * 2001/10/23 - Takao Indoh <indou dot takao at jp dot fujitsu dot com>
+ * - Various memory leak fixes
*/
-#include <linux/module.h>
+#include <linux/config.h>
#include <linux/kernel.h>
-#include <linux/netdevice.h>
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/interrupt.h>
+#include <linux/ptrace.h>
+#include <linux/ioport.h>
+#include <linux/in.h>
+#include <linux/slab.h>
+#include <linux/string.h>
#include <linux/init.h>
+#include <linux/timer.h>
+#include <linux/socket.h>
+#include <asm/system.h>
+#include <asm/bitops.h>
+#include <asm/io.h>
+#include <asm/dma.h>
+#include <asm/uaccess.h>
+#include <linux/errno.h>
+
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <net/sock.h>
+#include <linux/rtnetlink.h>
+
#include <linux/if_bonding.h>
+#include <linux/smp.h>
+#include <limits.h>
+#include <linux/if_ether.h>
+#include <linux/if_arp.h>
+
+/* monitor all links that often (in milliseconds). <=0 disables monitoring */
+#ifndef BOND_LINK_MON_INTERV
+#define BOND_LINK_MON_INTERV 0
+#endif
+
+#undef MII_LINK_UP
+#define MII_LINK_UP 0x04
+
+#undef MII_ENDOF_NWAY
+#define MII_ENDOF_NWAY 0x20
+
+#undef MII_LINK_READY
+/*#define MII_LINK_READY (MII_LINK_UP | MII_ENDOF_NWAY)*/
+#define MII_LINK_READY (MII_LINK_UP)
+
+#define MAX_BOND_ADDR 256
+
+#ifndef BOND_LINK_ARP_INTERV
+#define BOND_LINK_ARP_INTERV 0
+#endif
+
+static int arp_interval = BOND_LINK_ARP_INTERV;
+static char *arp_ip_target = NULL;
+static unsigned long arp_target = 0;
+static u32 my_ip = 0;
+char *arp_target_hw_addr = NULL;
+
+static int max_bonds = MAX_BONDS;
+static int miimon = BOND_LINK_MON_INTERV;
+static int mode = BOND_MODE_ROUNDROBIN;
+static int updelay = 0;
+static int downdelay = 0;
+
+static int first_pass = 1;
+int bond_cnt;
+static struct bonding *these_bonds = NULL;
+static struct net_device *dev_bonds = NULL;
+
+MODULE_PARM(max_bonds, "1-" __MODULE_STRING(INT_MAX) "i");
+MODULE_PARM_DESC(max_bonds, "Max number of bonded devices");
+MODULE_PARM(miimon, "i");
+MODULE_PARM_DESC(miimon, "Link check interval in milliseconds");
+MODULE_PARM(mode, "i");
+MODULE_PARM(arp_interval, "i");
+MODULE_PARM_DESC(arp_interval, "arp interval in milliseconds");
+MODULE_PARM(arp_ip_target, "1-12s");
+MODULE_PARM_DESC(arp_ip_target, "arp target in n.n.n.n form");
+MODULE_PARM_DESC(mode, "Mode of operation : 0 for round robin, 1 for active-backup, 2 for xor");
+MODULE_PARM(updelay, "i");
+MODULE_PARM_DESC(updelay, "Delay before considering link up, in milliseconds");
+MODULE_PARM(downdelay, "i");
+MODULE_PARM_DESC(downdelay, "Delay before considering link down, in milliseconds");
+
+extern void arp_send( int type, int ptype, u32 dest_ip, struct net_device *dev,
+ u32 src_ip, unsigned char *dest_hw, unsigned char *src_hw,
+ unsigned char *target_hw);
+
+static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *dev);
+static int bond_xmit_xor(struct sk_buff *skb, struct net_device *dev);
+static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *dev);
+static struct net_device_stats *bond_get_stats(struct net_device *dev);
+static void bond_mii_monitor(struct net_device *dev);
+static void bond_arp_monitor(struct net_device *dev);
+static int bond_event(struct notifier_block *this, unsigned long event, void *ptr);
+static void bond_set_slave_inactive_flags(slave_t *slave);
+static void bond_set_slave_active_flags(slave_t *slave);
+static int bond_enslave(struct net_device *master, struct net_device *slave);
+static int bond_release(struct net_device *master, struct net_device *slave);
+static int bond_sethwaddr(struct net_device *master, struct net_device *slave);
+
+/*
+ * bond_get_info is the interface into the /proc filesystem. This is
+ * a different interface than the BOND_INFO_QUERY ioctl. That is done
+ * through the generic networking ioctl interface, and bond_info_query
+ * is the internal function which provides that information.
+ */
+static int bond_get_info(char *buf, char **start, off_t offset, int length);
+
+/* #define BONDING_DEBUG 1 */
-typedef struct slave
+/* several macros */
+
+#define IS_UP(dev) ((((dev)->flags & (IFF_UP)) == (IFF_UP)) && \
+ (netif_running(dev) && netif_carrier_ok(dev)))
+
+static void bond_set_slave_inactive_flags(slave_t *slave)
{
- struct slave *next;
- struct slave *prev;
- struct net_device *dev;
-} slave_t;
+ slave->state = BOND_STATE_BACKUP;
+ slave->dev->flags |= IFF_NOARP;
+}
-typedef struct bonding
+static void bond_set_slave_active_flags(slave_t *slave)
{
- slave_t *next;
- slave_t *prev;
- struct net_device *master;
+ slave->state = BOND_STATE_ACTIVE;
+ slave->dev->flags &= ~IFF_NOARP;
+}
- slave_t *current_slave;
- struct net_device_stats stats;
-} bonding_t;
+/*
+ * This function detaches the slave <slave> from the list <bond>.
+ * WARNING: no check is made to verify if the slave effectively
+ * belongs to <bond>. It returns <slave> in case it's needed.
+ * Nothing is freed on return, structures are just unchained.
+ * If the bond->current_slave pointer was pointing to <slave>,
+ * it's replaced with slave->next, or <bond> if not applicable.
+ */
+static slave_t *bond_detach_slave(bonding_t *bond, slave_t *slave)
+{
+ if ((bond == NULL) || (slave == NULL) ||
+ ((void *)bond == (void *)slave)) {
+ printk(KERN_ERR
+ "bond_detach_slave(): trying to detach "
+ "slave %p from bond %p\n", bond, slave);
+ return slave;
+ }
+ if (bond->next == slave) { /* is the slave at the head ? */
+ if (bond->prev == slave) { /* is the slave alone ? */
+ write_lock(&bond->ptrlock);
+ bond->current_slave = NULL; /* no slave anymore */
+ write_unlock(&bond->ptrlock);
+ bond->prev = bond->next = (slave_t *)bond;
+ } else { /* not alone */
+ bond->next = slave->next;
+ slave->next->prev = (slave_t *)bond;
+ bond->prev->next = slave->next;
+
+ write_lock(&bond->ptrlock);
+ if (bond->current_slave == slave) {
+ bond->current_slave = slave->next;
+ }
+ write_unlock(&bond->ptrlock);
+ }
+ }
+ else {
+ slave->prev->next = slave->next;
+ if (bond->prev == slave) { /* is this slave the last one ? */
+ bond->prev = slave->prev;
+ } else {
+ slave->next->prev = slave->prev;
+ }
-static int bond_xmit(struct sk_buff *skb, struct net_device *dev);
-static struct net_device_stats *bond_get_stats(struct net_device *dev);
+ write_lock(&bond->ptrlock);
+ if (bond->current_slave == slave) {
+ bond->current_slave = slave->next;
+ }
+ write_unlock(&bond->ptrlock);
+ }
-static struct net_device *this_bond;
+ return slave;
+}
-static void release_one_slave(struct net_device *master, slave_t *slave)
+/*
+ * if <dev> supports MII link status reporting, check its link
+ * and report it as a bit field in a short int :
+ * - 0x04 means link is up,
+ * - 0x20 means end of autonegociation
+ * If the device doesn't support MII, then we only report 0x24,
+ * meaning that the link is up and running since we can't check it.
+ */
+static u16 bond_check_dev_link(struct net_device *dev)
{
- bonding_t *bond = master->priv;
+ static int (* ioctl)(struct net_device *, struct ifreq *, int);
+ struct ifreq ifr;
+ u16 *data = (u16 *)&ifr.ifr_data;
+
+ /* data[0] automagically filled by the ioctl */
+ data[1] = 1; /* MII location 1 reports Link Status */
+
+ if (((ioctl = dev->do_ioctl) != NULL) && /* ioctl to access MII */
+ (ioctl(dev, &ifr, SIOCGMIIPHY) == 0)) {
+ /* now, data[3] contains info about link status :
+ - data[3] & 0x04 means link up
+ - data[3] & 0x20 means end of auto-negociation
+ */
+ return data[3];
+ } else {
+ return MII_LINK_READY; /* spoof link up ( we can't check it) */
+ }
+}
- spin_lock_bh(&master->xmit_lock);
- if (bond->current_slave == slave)
- bond->current_slave = slave->next;
- slave->next->prev = slave->prev;
- slave->prev->next = slave->next;
- spin_unlock_bh(&master->xmit_lock);
+static u16 bond_check_mii_link(bonding_t *bond)
+{
+ int has_active_interface = 0;
- netdev_set_master(slave->dev, NULL);
+ read_lock(&bond->ptrlock);
+ has_active_interface = (bond->current_slave != NULL);
+ read_unlock(&bond->ptrlock);
- dev_put(slave->dev);
- kfree(slave);
+ return (has_active_interface ? MII_LINK_READY : 0);
+}
+
+static int bond_open(struct net_device *dev)
+{
+ struct timer_list *timer = &((struct bonding *)(dev->priv))->mii_timer;
+ struct timer_list *arp_timer = &((struct bonding *)(dev->priv))->arp_timer;
+ MOD_INC_USE_COUNT;
+
+ if (miimon > 0) { /* link check interval, in milliseconds. */
+ init_timer(timer);
+ timer->expires = jiffies + (miimon * HZ / 1000);
+ timer->data = (unsigned long)dev;
+ timer->function = (void *)&bond_mii_monitor;
+ add_timer(timer);
+ }
+
+ if (arp_interval> 0) { /* arp interval, in milliseconds. */
+ init_timer(arp_timer);
+ arp_timer->expires = jiffies + (arp_interval * HZ / 1000);
+ arp_timer->data = (unsigned long)dev;
+ arp_timer->function = (void *)&bond_arp_monitor;
+ add_timer(arp_timer);
+ }
+ return 0;
}
static int bond_close(struct net_device *master)
{
- bonding_t *bond = master->priv;
+ bonding_t *bond = (struct bonding *) master->priv;
slave_t *slave;
+ unsigned long flags;
- while ((slave = bond->next) != (slave_t*)bond)
- release_one_slave(master, slave);
+ write_lock_irqsave(&bond->lock, flags);
+ if (miimon > 0) { /* link check interval, in milliseconds. */
+ del_timer(&bond->mii_timer);
+ }
+ if (arp_interval> 0) { /* arp interval, in milliseconds. */
+ del_timer(&bond->arp_timer);
+ }
+ /* We need to unlock this because bond_release will re-lock it */
+ write_unlock_irqrestore(&bond->lock, flags);
+
+ /* Release the bonded slaves */
+ while ((slave = bond->prev) != (slave_t *)bond) {
+ bond_release(master, slave->dev);
+ }
+
+ MOD_DEC_USE_COUNT;
return 0;
}
-static void bond_set_multicast_list(struct net_device *master)
+static void set_multicast_list(struct net_device *master)
{
+/*
+ bonding_t *bond = master->priv;
+ slave_t *slave;
+
+ for (slave = bond->next; slave != (slave_t*)bond; slave = slave->next) {
+ slave->dev->mc_list = master->mc_list;
+ slave->dev->mc_count = master->mc_count;
+ slave->dev->flags = master->flags;
+ slave->dev->set_multicast_list(slave->dev);
+ }
+ */
}
-static int bond_enslave(struct net_device *master, struct net_device *dev)
+/*
+ * This function counts the the number of attached
+ * slaves for use by bond_xmit_xor.
+ */
+static void update_slave_cnt(bonding_t *bond)
{
- int err;
- bonding_t *bond = master->priv;
- slave_t *slave;
+ slave_t *slave = NULL;
+
+ bond->slave_cnt = 0;
+ for (slave = bond->prev; slave != (slave_t*)bond; slave = slave->prev) {
+ bond->slave_cnt++;
+ }
+}
- if (dev->type != master->type)
+/* enslave device <slave> to bond device <master> */
+static int bond_enslave(struct net_device *master_dev,
+ struct net_device *slave_dev)
+{
+ bonding_t *bond = NULL;
+ slave_t *new_slave = NULL;
+ unsigned long flags = 0;
+ int ndx = 0;
+ int err = 0;
+
+ if (master_dev == NULL || slave_dev == NULL) {
return -ENODEV;
+ }
+ bond = (struct bonding *) master_dev->priv;
+
+ if (slave_dev->do_ioctl == NULL) {
+ printk(KERN_DEBUG
+ "Warning : no link monitoring support for %s\n",
+ slave_dev->name);
+ }
+ write_lock_irqsave(&bond->lock, flags);
+
+ /* not running. */
+ if ((slave_dev->flags & IFF_UP) != IFF_UP) {
+#ifdef BONDING_DEBUG
+ printk(KERN_CRIT "Error, slave_dev is not running\n");
+#endif
+ write_unlock_irqrestore(&bond->lock, flags);
+ return -EINVAL;
+ }
- if ((slave = kmalloc(sizeof(slave_t), GFP_KERNEL)) == NULL)
+ /* already enslaved */
+ if (master_dev->flags & IFF_SLAVE || slave_dev->flags & IFF_SLAVE) {
+#ifdef BONDING_DEBUG
+ printk(KERN_CRIT "Error, Device was already enslaved\n");
+#endif
+ write_unlock_irqrestore(&bond->lock, flags);
+ return -EBUSY;
+ }
+
+ if ((new_slave = kmalloc(sizeof(slave_t), GFP_KERNEL)) == NULL) {
+ write_unlock_irqrestore(&bond->lock, flags);
return -ENOMEM;
+ }
+ memset(new_slave, 0, sizeof(slave_t));
- memset(slave, 0, sizeof(slave_t));
+ err = netdev_set_master(slave_dev, master_dev);
- err = netdev_set_master(dev, master);
if (err) {
- kfree(slave);
- return err;
+#ifdef BONDING_DEBUG
+ printk(KERN_CRIT "Error %d calling netdev_set_master\n", err);
+#endif
+ kfree(new_slave);
+ write_unlock_irqrestore(&bond->lock, flags);
+ return err;
}
- slave->dev = dev;
+ new_slave->dev = slave_dev;
- spin_lock_bh(&master->xmit_lock);
+ /*
+ * queue to the end of the slaves list, make the first element its
+ * successor, the last one its predecessor, and make it the bond's
+ * predecessor.
+ */
+ new_slave->prev = bond->prev;
+ new_slave->prev->next = new_slave;
+ bond->prev = new_slave;
+ new_slave->next = bond->next;
+
+ new_slave->delay = 0;
+ new_slave->link_failure_count = 0;
+
+ /* check for initial state */
+ if ((miimon <= 0) || ((bond_check_dev_link(slave_dev) & MII_LINK_READY)
+ == MII_LINK_READY)) {
+#ifdef BONDING_DEBUG
+ printk(KERN_CRIT "Initial state of slave_dev is BOND_LINK_UP\n");
+#endif
+ new_slave->link = BOND_LINK_UP;
+ }
+ else {
+#ifdef BONDING_DEBUG
+ printk(KERN_CRIT "Initial state of slave_dev is BOND_LINK_DOWN\n");
+#endif
+ new_slave->link = BOND_LINK_DOWN;
+ }
- dev_hold(dev);
+ /* if we're in active-backup mode, we need one and only one active
+ * interface. The backup interfaces will have their NOARP flag set
+ * because we need them to be completely deaf and not to respond to
+ * any ARP request on the network to avoid fooling a switch. Thus,
+ * since we guarantee that current_slave always point to the last
+ * usable interface, we just have to verify this interface's flag.
+ */
+ if (mode == BOND_MODE_ACTIVEBACKUP) {
+ if (((bond->current_slave == NULL)
+ || (bond->current_slave->dev->flags & IFF_NOARP))
+ && (new_slave->link == BOND_LINK_UP)) {
+#ifdef BONDING_DEBUG
+ printk(KERN_CRIT "This is the first active slave\n");
+#endif
+ /* first slave or no active slave yet, and this link
+ is OK, so make this interface the active one */
+ bond->current_slave = new_slave;
+ bond_set_slave_active_flags(new_slave);
+ }
+ else {
+#ifdef BONDING_DEBUG
+ printk(KERN_CRIT "This is just a backup slave\n");
+#endif
+ bond_set_slave_inactive_flags(new_slave);
+ }
+ } else {
+#ifdef BONDING_DEBUG
+ printk(KERN_CRIT "This slave is always active in trunk mode\n");
+#endif
+ /* always active in trunk mode */
+ new_slave->state = BOND_STATE_ACTIVE;
+ if (bond->current_slave == NULL) {
+ bond->current_slave = new_slave;
+ }
+ }
+
+ update_slave_cnt(bond);
- slave->prev = bond->prev;
- slave->next = (slave_t*)bond;
- slave->prev->next = slave;
- slave->next->prev = slave;
+ write_unlock_irqrestore(&bond->lock, flags);
+
+ /*
+ * !!! This is to support old versions of ifenslave. We can remove
+ * this in 2.5 because our ifenslave takes care of this for us.
+ * We check to see if the master has a mac address yet. If not,
+ * we'll give it the mac address of our slave device.
+ */
+ for (ndx = 0; ndx < slave_dev->addr_len; ndx++) {
+#ifdef BONDING_DEBUG
+ printk(KERN_CRIT "Checking ndx=%d of master_dev->dev_addr\n",
+ ndx);
+#endif
+ if (master_dev->dev_addr[ndx] != 0) {
+#ifdef BONDING_DEBUG
+ printk(KERN_CRIT "Found non-zero byte at ndx=%d\n",
+ ndx);
+#endif
+ break;
+ }
+ }
+ if (ndx == slave_dev->addr_len) {
+ /*
+ * We got all the way through the address and it was
+ * all 0's.
+ */
+#ifdef BONDING_DEBUG
+ printk(KERN_CRIT "%s doesn't have a MAC address yet. ",
+ master_dev->name);
+ printk(KERN_CRIT "Going to give assign it from %s.\n",
+ slave_dev->name);
+#endif
+ bond_sethwaddr(master_dev, slave_dev);
+ }
- spin_unlock_bh(&master->xmit_lock);
+ printk (KERN_INFO "%s: enslaving %s as a%s interface with a%s link.\n",
+ master_dev->name, slave_dev->name,
+ new_slave->state == BOND_STATE_ACTIVE ? "n active" : " backup",
+ new_slave->link == BOND_LINK_UP ? "n up" : " down");
return 0;
}
-static int bond_release(struct net_device *master, struct net_device *dev)
+/*
+ * This function changes the active slave to slave <slave_dev>.
+ * It returns -EINVAL in the following cases.
+ * - <slave_dev> is not found in the list.
+ * - There is not active slave now.
+ * - <slave_dev> is already active.
+ * - The link state of <slave_dev> is not BOND_LINK_UP.
+ * - <slave_dev> is not running.
+ * In these cases, this fuction does nothing.
+ * In the other cases, currnt_slave pointer is changed and 0 is returned.
+ */
+static int bond_change_active(struct net_device *master_dev, struct net_device *slave_dev)
{
- bonding_t *bond = master->priv;
+ bonding_t *bond;
slave_t *slave;
+ slave_t *oldactive = NULL;
+ slave_t *newactive = NULL;
+ unsigned long flags;
+ int ret = 0;
- if (dev->master != master)
+ if (master_dev == NULL || slave_dev == NULL) {
+ return -ENODEV;
+ }
+
+ bond = (struct bonding *) master_dev->priv;
+ write_lock_irqsave(&bond->lock, flags);
+ slave = (slave_t *)bond;
+ oldactive = bond->current_slave;
+
+ while ((slave = slave->prev) != (slave_t *)bond) {
+ if(slave_dev == slave->dev) {
+ newactive = slave;
+ break;
+ }
+ }
+
+ if ((newactive != NULL)&&
+ (oldactive != NULL)&&
+ (newactive != oldactive)&&
+ (newactive->link == BOND_LINK_UP)&&
+ IS_UP(newactive->dev)) {
+ bond_set_slave_inactive_flags(oldactive);
+ bond_set_slave_active_flags(newactive);
+ bond->current_slave = newactive;
+ printk("%s : activate %s(old : %s)\n",
+ master_dev->name, newactive->dev->name,
+ oldactive->dev->name);
+ }
+ else {
+ ret = -EINVAL;
+ }
+ write_unlock_irqrestore(&bond->lock, flags);
+ return ret;
+}
+
+/* Choose a new valid interface from the pool, set it active
+ * and make it the current slave. If no valid interface is
+ * found, the oldest slave in BACK state is choosen and
+ * activated. If none is found, it's considered as no
+ * interfaces left so the current slave is set to NULL.
+ * The result is a pointer to the current slave.
+ *
+ * Since this function sends messages tails through printk, the caller
+ * must have started something like `printk(KERN_INFO "xxxx ");'.
+ *
+ * Warning: must put locks around the call to this function if needed.
+ */
+slave_t *change_active_interface(bonding_t *bond)
+{
+ slave_t *newslave, *oldslave;
+ slave_t *bestslave = NULL;
+ int mintime;
+
+ read_lock(&bond->ptrlock);
+ newslave = oldslave = bond->current_slave;
+ read_unlock(&bond->ptrlock);
+
+ if (newslave == NULL) { /* there were no active slaves left */
+ if (bond->next != (slave_t *)bond) { /* found one slave */
+ write_lock(&bond->ptrlock);
+ newslave = bond->current_slave = bond->next;
+ write_unlock(&bond->ptrlock);
+ } else {
+ printk (" but could not find any %s interface.\n",
+ (mode == BOND_MODE_ACTIVEBACKUP) ? "backup":"other");
+ write_lock(&bond->ptrlock);
+ bond->current_slave = (slave_t *)NULL;
+ write_unlock(&bond->ptrlock);
+ return NULL; /* still no slave, return NULL */
+ }
+ }
+
+ mintime = updelay;
+
+ do {
+ if (IS_UP(newslave->dev)) {
+ if (newslave->link == BOND_LINK_UP) {
+ /* this one is immediately usable */
+ if (mode == BOND_MODE_ACTIVEBACKUP) {
+ bond_set_slave_active_flags(newslave);
+ printk (" and making interface %s the active one.\n",
+ newslave->dev->name);
+ }
+ else {
+ printk (" and setting pointer to interface %s.\n",
+ newslave->dev->name);
+ }
+
+ write_lock(&bond->ptrlock);
+ bond->current_slave = newslave;
+ write_unlock(&bond->ptrlock);
+ return newslave;
+ }
+ else if (newslave->link == BOND_LINK_BACK) {
+ /* link up, but waiting for stabilization */
+ if (newslave->delay < mintime) {
+ mintime = newslave->delay;
+ bestslave = newslave;
+ }
+ }
+ }
+ } while ((newslave = newslave->next) != oldslave);
+
+ /* no usable backup found, we'll see if we at least got a link that was
+ coming back for a long time, and could possibly already be usable.
+ */
+
+ if (bestslave != NULL) {
+ /* early take-over. */
+ printk (" and making interface %s the active one %d ms earlier.\n",
+ bestslave->dev->name,
+ (updelay - bestslave->delay)*miimon);
+
+ bestslave->delay = 0;
+ bestslave->link = BOND_LINK_UP;
+ bond_set_slave_active_flags(bestslave);
+
+ write_lock(&bond->ptrlock);
+ bond->current_slave = bestslave;
+ write_unlock(&bond->ptrlock);
+ return bestslave;
+ }
+
+ printk (" but could not find any %s interface.\n",
+ (mode == BOND_MODE_ACTIVEBACKUP) ? "backup":"other");
+
+ /* absolutely nothing found. let's return NULL */
+ write_lock(&bond->ptrlock);
+ bond->current_slave = (slave_t *)NULL;
+ write_unlock(&bond->ptrlock);
+ return NULL;
+}
+
+/*
+ * Try to release the slave device <slave> from the bond device <master>
+ * It is legal to access current_slave without a lock because all the function
+ * is write-locked.
+ *
+ * The rules for slave state should be:
+ * for Active/Backup:
+ * Active stays on all backups go down
+ * for Bonded connections:
+ * The first up interface should be left on and all others downed.
+ */
+static int bond_release(struct net_device *master, struct net_device *slave)
+{
+ bonding_t *bond;
+ slave_t *our_slave, *old_current;
+ unsigned long flags;
+
+ if (master == NULL || slave == NULL) {
+ return -ENODEV;
+ }
+
+ bond = (struct bonding *) master->priv;
+
+ write_lock_irqsave(&bond->lock, flags);
+
+ /* master already enslaved, or slave not enslaved,
+ or no slave for this master */
+ if ((master->flags & IFF_SLAVE) || !(slave->flags & IFF_SLAVE)) {
+ printk (KERN_DEBUG "%s: cannot release %s.\n", master->name, slave->name);
+ write_unlock_irqrestore(&bond->lock, flags);
return -EINVAL;
+ }
- for (slave = bond->next; slave != (slave_t*)bond; slave = slave->next) {
- if (slave->dev == dev) {
- release_one_slave(master, slave);
+ our_slave = (slave_t *)bond;
+ old_current = bond->current_slave;
+ while ((our_slave = our_slave->prev) != (slave_t *)bond) {
+ if (our_slave->dev == slave) {
+ bond_detach_slave(bond, our_slave);
+
+ printk (KERN_INFO "%s: releasing %s interface %s",
+ master->name,
+ (our_slave->state == BOND_STATE_ACTIVE) ? "active" : "backup",
+ slave->name);
+
+ if (our_slave == old_current) {
+ /* find a new interface and be verbose */
+ change_active_interface(bond);
+ } else {
+ printk(".\n");
+ }
+ kfree(our_slave);
+
+ /* release the slave from its bond */
+
+ netdev_set_master(slave, NULL);
+
+ /* only restore its RUNNING flag if monitoring set it down */
+ if (slave->flags & IFF_UP) {
+ slave->flags |= IFF_RUNNING;
+ }
+
+ if (slave->flags & IFF_NOARP ||
+ bond->current_slave != NULL) {
+ dev_close(slave);
+ }
+
+ if (bond->current_slave == NULL) {
+ printk(KERN_INFO
+ "%s: now running without any active interface !\n",
+ master->name);
+ }
+
+ update_slave_cnt(bond);
+
+ write_unlock_irqrestore(&bond->lock, flags);
+ return 0; /* deletion OK */
+ }
+ }
+
+ /* if we get here, it's because the device was not found */
+ write_unlock_irqrestore(&bond->lock, flags);
+
+ printk (KERN_INFO "%s: %s not enslaved\n", master->name, slave->name);
+ return -EINVAL;
+}
+
+/* this function is called regularly to monitor each slave's link. */
+static void bond_mii_monitor(struct net_device *master)
+{
+ bonding_t *bond = (struct bonding *) master->priv;
+ slave_t *slave, *bestslave, *oldcurrent;
+ unsigned long flags;
+ int slave_died = 0;
+
+ read_lock_irqsave(&bond->lock, flags);
+
+ if (rtnl_shlock_nowait()) {
+ goto monitor_out;
+ }
+
+ if (rtnl_exlock_nowait()) {
+ rtnl_shunlock();
+ goto monitor_out;
+ }
+ /* we will try to read the link status of each of our slaves, and
+ * set their IFF_RUNNING flag appropriately. For each slave not
+ * supporting MII status, we won't do anything so that a user-space
+ * program could monitor the link itself if needed.
+ */
+
+ bestslave = NULL;
+ slave = (slave_t *)bond;
+
+ read_lock(&bond->ptrlock);
+ oldcurrent = bond->current_slave;
+ read_unlock(&bond->ptrlock);
+
+ while ((slave = slave->prev) != (slave_t *)bond) {
+ /* use updelay+1 to match an UP slave even when updelay is 0 */
+ int mindelay = updelay + 1;
+ struct net_device *dev = slave->dev;
+ u16 link_state;
+
+ link_state = bond_check_dev_link(dev);
+
+ switch (slave->link) {
+ case BOND_LINK_UP: /* the link was up */
+ if ((link_state & MII_LINK_UP) == MII_LINK_UP) {
+ /* link stays up, tell that this one
+ is immediately available */
+ if (IS_UP(dev) && (mindelay > -2)) {
+ /* -2 is the best case :
+ this slave was already up */
+ mindelay = -2;
+ bestslave = slave;
+ }
+ break;
+ }
+ else { /* link going down */
+ slave->link = BOND_LINK_FAIL;
+ slave->delay = downdelay;
+ if (slave->link_failure_count < UINT_MAX) {
+ slave->link_failure_count++;
+ }
+ if (downdelay > 0) {
+ printk (KERN_INFO
+ "%s: link status down for %sinterface "
+ "%s, disabling it in %d ms.\n",
+ master->name,
+ IS_UP(dev)
+ ? ((mode == BOND_MODE_ACTIVEBACKUP)
+ ? ((slave == oldcurrent)
+ ? "active " : "backup ")
+ : "")
+ : "idle ",
+ dev->name,
+ downdelay * miimon);
+ }
+ }
+ /* no break ! fall through the BOND_LINK_FAIL test to
+ ensure proper action to be taken
+ */
+ case BOND_LINK_FAIL: /* the link has just gone down */
+ if ((link_state & MII_LINK_UP) == 0) {
+ /* link stays down */
+ if (slave->delay <= 0) {
+ /* link down for too long time */
+ slave->link = BOND_LINK_DOWN;
+ /* in active/backup mode, we must
+ completely disable this interface */
+ if (mode == BOND_MODE_ACTIVEBACKUP) {
+ bond_set_slave_inactive_flags(slave);
+ }
+ printk(KERN_INFO
+ "%s: link status definitely down "
+ "for interface %s, disabling it",
+ master->name,
+ dev->name);
+
+ read_lock(&bond->ptrlock);
+ if (slave == bond->current_slave) {
+ read_unlock(&bond->ptrlock);
+ /* find a new interface and be verbose */
+ change_active_interface(bond);
+ } else {
+ read_unlock(&bond->ptrlock);
+ printk(".\n");
+ }
+ slave_died = 1;
+ } else {
+ slave->delay--;
+ }
+ } else if ((link_state & MII_LINK_READY) == MII_LINK_READY) {
+ /* link up again */
+ slave->link = BOND_LINK_UP;
+ printk(KERN_INFO
+ "%s: link status up again after %d ms "
+ "for interface %s.\n",
+ master->name,
+ (downdelay - slave->delay) * miimon,
+ dev->name);
+
+ if (IS_UP(dev) && (mindelay > -1)) {
+ /* -1 is a good case : this slave went
+ down only for a short time */
+ mindelay = -1;
+ bestslave = slave;
+ }
+ }
break;
+ case BOND_LINK_DOWN: /* the link was down */
+ if ((link_state & MII_LINK_READY) != MII_LINK_READY) {
+ /* the link stays down, nothing more to do */
+ break;
+ } else { /* link going up */
+ slave->link = BOND_LINK_BACK;
+ slave->delay = updelay;
+
+ if (updelay > 0) {
+ /* if updelay == 0, no need to
+ advertise about a 0 ms delay */
+ printk (KERN_INFO
+ "%s: link status up for interface"
+ " %s, enabling it in %d ms.\n",
+ master->name,
+ dev->name,
+ updelay * miimon);
+ }
+ }
+ /* no break ! fall through the BOND_LINK_BACK state in
+ case there's something to do.
+ */
+ case BOND_LINK_BACK: /* the link has just come back */
+ if ((link_state & MII_LINK_UP) == 0) {
+ /* link down again */
+ slave->link = BOND_LINK_DOWN;
+ printk(KERN_INFO
+ "%s: link status down again after %d ms "
+ "for interface %s.\n",
+ master->name,
+ (updelay - slave->delay) * miimon,
+ dev->name);
+ }
+ else if ((link_state & MII_LINK_READY) == MII_LINK_READY) {
+ /* link stays up */
+ if (slave->delay == 0) {
+ /* now the link has been up for long time enough */
+ slave->link = BOND_LINK_UP;
+
+ if (mode == BOND_MODE_ACTIVEBACKUP) {
+ /* prevent it from being the active one */
+ slave->state = BOND_STATE_BACKUP;
+ }
+ else {
+ /* make it immediately active */
+ slave->state = BOND_STATE_ACTIVE;
+ }
+
+ printk(KERN_INFO
+ "%s: link status definitely up "
+ "for interface %s.\n",
+ master->name,
+ dev->name);
+ }
+ else
+ slave->delay--;
+
+ /* we'll also look for the mostly eligible slave */
+ if (IS_UP(dev) && (slave->delay < mindelay)) {
+ mindelay = slave->delay;
+ bestslave = slave;
+ }
+ }
+ break;
+ } /* end of switch */
+ } /* end of while */
+
+ /* if there's no active interface and we discovered that one
+ of the slaves could be activated earlier, so we do it.
+ */
+ read_lock(&bond->ptrlock);
+ oldcurrent = bond->current_slave;
+ read_unlock(&bond->ptrlock);
+
+ if (oldcurrent == NULL) { /* no active interface at the moment */
+ if (bestslave != NULL) { /* last chance to find one ? */
+ if (bestslave->link == BOND_LINK_UP) {
+ printk (KERN_INFO
+ "%s: making interface %s the new active one.\n",
+ master->name, bestslave->dev->name);
+ } else {
+ printk (KERN_INFO
+ "%s: making interface %s the new "
+ "active one %d ms earlier.\n",
+ master->name, bestslave->dev->name,
+ (updelay - bestslave->delay) * miimon);
+
+ bestslave->delay= 0;
+ bestslave->link = BOND_LINK_UP;
+ }
+
+ if (mode == BOND_MODE_ACTIVEBACKUP) {
+ bond_set_slave_active_flags(bestslave);
+ } else {
+ bestslave->state = BOND_STATE_ACTIVE;
+ }
+ write_lock(&bond->ptrlock);
+ bond->current_slave = bestslave;
+ write_unlock(&bond->ptrlock);
+ } else if (slave_died) {
+ /* print this message only once a slave has just died */
+ printk(KERN_INFO
+ "%s: now running without any active interface !\n",
+ master->name);
}
}
- return 0;
+ rtnl_exunlock();
+ rtnl_shunlock();
+monitor_out:
+ read_unlock_irqrestore(&bond->lock, flags);
+ /* re-arm the timer */
+ mod_timer(&bond->mii_timer, jiffies + (miimon * HZ / 1000));
}
-/* It is pretty silly, SIOCSIFHWADDR exists to make this. */
+/*
+ * this function is called regularly to monitor each slave's link
+ * insuring that traffic is being sent and received. If the adapter
+ * has been dormant, then an arp is transmitted to generate traffic
+ */
+static void bond_arp_monitor(struct net_device *master)
+{
+ bonding_t *bond;
+ unsigned long flags;
+ slave_t *slave;
+ int the_delta_in_ticks = arp_interval * HZ / 1000;
+ int next_timer = jiffies + (arp_interval * HZ / 1000);
+
+ bond = (struct bonding *) master->priv;
+ if (master->priv == NULL) {
+ mod_timer(&bond->arp_timer, next_timer);
+ return;
+ }
+
+ read_lock_irqsave(&bond->lock, flags);
+
+ if (!IS_UP(master)) {
+ mod_timer(&bond->arp_timer, next_timer);
+ goto monitor_out;
+ }
+
+
+ if (rtnl_shlock_nowait()) {
+ goto monitor_out;
+ }
+
+ if (rtnl_exlock_nowait()) {
+ rtnl_shunlock();
+ goto monitor_out;
+ }
+
+ /* see if any of the previous devices are up now (i.e. they have seen a
+ * response from an arp request sent by another adapter, since they
+ * have the same hardware address).
+ */
+
+ slave = (slave_t *)bond;
+ while ((slave = slave->prev) != (slave_t *)bond) {
+
+ read_lock(&bond->ptrlock);
+ if ( (!(slave->link == BOND_LINK_UP))
+ && (slave!= bond->current_slave) ) {
+
+ read_unlock(&bond->ptrlock);
+
+ if ( ((jiffies - slave->dev->trans_start) <=
+ the_delta_in_ticks) &&
+ ((jiffies - slave->dev->last_rx) <=
+ the_delta_in_ticks) ) {
+
+ slave->link = BOND_LINK_UP;
+ write_lock(&bond->ptrlock);
+ if (bond->current_slave == NULL) {
+ slave->state = BOND_STATE_ACTIVE;
+ bond->current_slave = slave;
+ }
+ if (slave!=bond->current_slave) {
+ slave->dev->flags |= IFF_NOARP;
+ }
+ write_unlock(&bond->ptrlock);
+ } else {
+ if ((jiffies - slave->dev->last_rx) <=
+ the_delta_in_ticks) {
+ arp_send(ARPOP_REQUEST, ETH_P_ARP,
+ arp_target, slave->dev,
+ my_ip, arp_target_hw_addr,
+ slave->dev->dev_addr,
+ arp_target_hw_addr);
+ }
+ }
+ } else
+ read_unlock(&bond->ptrlock);
+ }
+
+ read_lock(&bond->ptrlock);
+ slave = bond->current_slave;
+ read_unlock(&bond->ptrlock);
+
+ if (slave != 0) {
+
+ /* see if you need to take down the current_slave, since
+ * you haven't seen an arp in 2*arp_intervals
+ */
+
+ if ( ((jiffies - slave->dev->trans_start) >=
+ (2*the_delta_in_ticks)) ||
+ ((jiffies - slave->dev->last_rx) >=
+ (2*the_delta_in_ticks)) ) {
+
+ if (slave->link == BOND_LINK_UP) {
+ slave->link = BOND_LINK_DOWN;
+ slave->state = BOND_STATE_BACKUP;
+ /*
+ * we want to see arps, otherwise we couldn't
+ * bring the adapter back online...
+ */
+ printk(KERN_INFO "%s: link status definitely "
+ "down for interface %s, "
+ "disabling it",
+ slave->dev->master->name,
+ slave->dev->name);
+ /* find a new interface and be verbose */
+ change_active_interface(bond);
+ read_lock(&bond->ptrlock);
+ slave = bond->current_slave;
+ read_unlock(&bond->ptrlock);
+ }
+ }
+
+ /*
+ * ok, we know up/down, so just send a arp out if there has
+ * been no activity for a while
+ */
+
+ if (slave != NULL ) {
+ if ( ((jiffies - slave->dev->trans_start) >=
+ the_delta_in_ticks) ||
+ ((jiffies - slave->dev->last_rx) >=
+ the_delta_in_ticks) ) {
+ arp_send(ARPOP_REQUEST, ETH_P_ARP,
+ arp_target, slave->dev,
+ my_ip, arp_target_hw_addr,
+ slave->dev->dev_addr,
+ arp_target_hw_addr);
+ }
+ }
+
+ }
+
+ /* if we have no current slave.. try sending
+ * an arp on all of the interfaces
+ */
+
+ if (bond->current_slave == NULL) {
+ slave = (slave_t *)bond;
+ while ((slave = slave->prev) != (slave_t *)bond) {
+ arp_send(ARPOP_REQUEST, ETH_P_ARP, arp_target,
+ slave->dev, my_ip, arp_target_hw_addr,
+ slave->dev->dev_addr, arp_target_hw_addr);
+ }
+ }
+
+ rtnl_exunlock();
+ rtnl_shunlock();
+
+monitor_out:
+ read_unlock_irqrestore(&bond->lock, flags);
+
+ /* re-arm the timer */
+ mod_timer(&bond->arp_timer, next_timer);
+}
+
+#define isdigit(c) (c >= '0' && c <= '9')
+__inline static int atoi( char **s)
+{
+int i=0;
+while (isdigit(**s))
+ i = i*20 + *((*s)++) - '0';
+return i;
+}
+
+#define isascii(c) (((unsigned char)(c))<=0x7f)
+#define LF 0xA
+#define isspace(c) (c==' ' || c==' '|| c==LF)
+typedef uint32_t in_addr_t;
+
+int
+my_inet_aton(char *cp, unsigned long *the_addr) {
+ static const in_addr_t max[4] = { 0xffffffff, 0xffffff, 0xffff, 0xff };
+ in_addr_t val;
+ char c;
+ union iaddr {
+ uint8_t bytes[4];
+ uint32_t word;
+ } res;
+ uint8_t *pp = res.bytes;
+ int digit,base;
+
+ res.word = 0;
+
+ c = *cp;
+ for (;;) {
+ /*
+ * Collect number up to ``.''.
+ * Values are specified as for C:
+ * 0x=hex, 0=octal, isdigit=decimal.
+ */
+ if (!isdigit(c)) goto ret_0;
+ val = 0; base = 10; digit = 0;
+ for (;;) {
+ if (isdigit(c)) {
+ val = (val * base) + (c - '0');
+ c = *++cp;
+ digit = 1;
+ } else {
+ break;
+ }
+ }
+ if (c == '.') {
+ /*
+ * Internet format:
+ * a.b.c.d
+ * a.b.c (with c treated as 16 bits)
+ * a.b (with b treated as 24 bits)
+ */
+ if (pp > res.bytes + 2 || val > 0xff) {
+ goto ret_0;
+ }
+ *pp++ = val;
+ c = *++cp;
+ } else
+ break;
+ }
+ /*
+ * Check for trailing characters.
+ */
+ if (c != '\0' && (!isascii(c) || !isspace(c))) {
+ goto ret_0;
+ }
+ /*
+ * Did we get a valid digit?
+ */
+ if (!digit) {
+ goto ret_0;
+ }
+
+ /* Check whether the last part is in its limits depending on
+ the number of parts in total. */
+ if (val > max[pp - res.bytes]) {
+ goto ret_0;
+ }
+
+ if (the_addr!= NULL) {
+ *the_addr = res.word | htonl (val);
+ }
+
+ return (1);
+
+ret_0:
+ return (0);
+}
static int bond_sethwaddr(struct net_device *master, struct net_device *slave)
{
+#ifdef BONDING_DEBUG
+ printk(KERN_CRIT "bond_sethwaddr: master=%x\n", (unsigned int)master);
+ printk(KERN_CRIT "bond_sethwaddr: slave=%x\n", (unsigned int)slave);
+ printk(KERN_CRIT "bond_sethwaddr: slave->addr_len=%d\n", slave->addr_len);
+#endif
memcpy(master->dev_addr, slave->dev_addr, slave->addr_len);
return 0;
}
-static int bond_ioctl(struct net_device *master, struct ifreq *ifr, int cmd)
+static int bond_info_query(struct net_device *master, struct ifbond *info)
{
- struct net_device *slave = __dev_get_by_name(ifr->ifr_slave);
+ bonding_t *bond = (struct bonding *) master->priv;
+ slave_t *slave;
+
+ info->bond_mode = mode;
+ info->num_slaves = 0;
+ info->miimon = miimon;
+
+ read_lock(&bond->ptrlock);
+ for (slave = bond->prev; slave!=(slave_t *)bond; slave = slave->prev) {
+ info->num_slaves++;
+ }
+ read_unlock(&bond->ptrlock);
+
+ return 0;
+}
- if (slave == NULL)
+static int bond_slave_info_query(struct net_device *master,
+ struct ifslave *info)
+{
+ bonding_t *bond = (struct bonding *) master->priv;
+ slave_t *slave;
+ int cur_ndx = 0;
+
+ if (info->slave_id < 0) {
return -ENODEV;
+ }
- switch (cmd) {
- case BOND_ENSLAVE:
- return bond_enslave(master, slave);
- case BOND_RELEASE:
- return bond_release(master, slave);
- case BOND_SETHWADDR:
- return bond_sethwaddr(master, slave);
- default:
- return -EOPNOTSUPP;
+ read_lock(&bond->ptrlock);
+ for (slave = bond->prev;
+ slave != (slave_t *)bond && cur_ndx < info->slave_id;
+ slave = slave->prev) {
+ cur_ndx++;
}
+ if (cur_ndx == info->slave_id) {
+ strcpy(info->slave_name, slave->dev->name);
+ info->link = slave->link;
+ info->state = slave->state;
+ info->link_failure_count = slave->link_failure_count;
+ } else {
+ read_unlock(&bond->ptrlock);
+ return -ENODEV;
+ }
+ read_unlock(&bond->ptrlock);
+
+ return 0;
}
-static int bond_event(struct notifier_block *this, unsigned long event, void *ptr)
+static int bond_ioctl(struct net_device *master_dev, struct ifreq *ifr, int cmd)
{
- struct net_device *slave = ptr;
+ struct net_device *slave_dev = NULL;
+ struct ifbond *u_binfo = NULL, k_binfo;
+ struct ifslave *u_sinfo = NULL, k_sinfo;
+ u16 *data = NULL;
+ int ret = 0;
+
+#ifdef BONDING_DEBUG
+ printk(KERN_INFO "bond_ioctl: master=%s, cmd=%d\n",
+ master_dev->name, cmd);
+#endif
+
+ switch (cmd) {
+ case SIOCGMIIPHY:
+ data = (u16 *)&ifr->ifr_data;
+ if (data == NULL) {
+ return -EINVAL;
+ }
+ data[0] = 0;
+ /* Fall Through */
+ case SIOCGMIIREG:
+ /*
+ * We do this again just in case we were called by SIOCGMIIREG
+ * instead of SIOCGMIIPHY.
+ */
+ data = (u16 *)&ifr->ifr_data;
+ if (data == NULL) {
+ return -EINVAL;
+ }
+ if (data[1] == 1) {
+ data[3] = bond_check_mii_link(
+ (struct bonding *)master_dev->priv);
+ }
+ return 0;
+ case BOND_INFO_QUERY_OLD:
+ case SIOCBONDINFOQUERY:
+ u_binfo = (struct ifbond *)ifr->ifr_data;
+ if (copy_from_user(&k_binfo, u_binfo, sizeof(ifbond))) {
+ return -EFAULT;
+ }
+ ret = bond_info_query(master_dev, &k_binfo);
+ if (ret == 0) {
+ if (copy_to_user(u_binfo, &k_binfo, sizeof(ifbond))) {
+ return -EFAULT;
+ }
+ }
+ return ret;
+ case BOND_SLAVE_INFO_QUERY_OLD:
+ case SIOCBONDSLAVEINFOQUERY:
+ u_sinfo = (struct ifslave *)ifr->ifr_data;
+ if (copy_from_user(&k_sinfo, u_sinfo, sizeof(ifslave))) {
+ return -EFAULT;
+ }
+ ret = bond_slave_info_query(master_dev, &k_sinfo);
+ if (ret == 0) {
+ if (copy_to_user(u_sinfo, &k_sinfo, sizeof(ifslave))) {
+ return -EFAULT;
+ }
+ }
+ return ret;
+ }
- if (this_bond == NULL ||
- this_bond == slave ||
- this_bond != slave->master)
- return NOTIFY_DONE;
+ if (!capable(CAP_NET_ADMIN)) {
+ return -EPERM;
+ }
- switch (event) {
- case NETDEV_UNREGISTER:
- bond_release(this_bond, slave);
+ slave_dev = dev_get_by_name(ifr->ifr_slave);
+#ifdef BONDING_DEBUG
+ printk(KERN_INFO "slave_dev=%x: \n", (unsigned int)slave_dev);
+ printk(KERN_INFO "slave_dev->name=%s: \n", slave_dev->name);
+#endif
+ switch (cmd) {
+ case BOND_ENSLAVE_OLD:
+ case SIOCBONDENSLAVE:
+ ret = bond_enslave(master_dev, slave_dev);
+ break;
+ case BOND_RELEASE_OLD:
+ case SIOCBONDRELEASE:
+ ret = bond_release(master_dev, slave_dev);
break;
+ case BOND_SETHWADDR_OLD:
+ case SIOCBONDSETHWADDR:
+ ret = bond_sethwaddr(master_dev, slave_dev);
+ break;
+ case BOND_CHANGE_ACTIVE_OLD:
+ case SIOCBONDCHANGEACTIVE:
+ if (mode == BOND_MODE_ACTIVEBACKUP) {
+ ret = bond_change_active(master_dev, slave_dev);
+ }
+ else {
+ ret = -EINVAL;
+ }
+ break;
+ default:
+ ret = -EOPNOTSUPP;
}
- return NOTIFY_DONE;
+ if (slave_dev) {
+ /*
+ * Clear the module reference that was added by dev_get_by_name
+ */
+ dev_put(slave_dev);
+ }
+ return ret;
}
-static struct notifier_block bond_netdev_notifier={
- notifier_call: bond_event
-};
+#ifdef CONFIG_NET_FASTROUTE
+static int bond_accept_fastpath(struct net_device *dev, struct dst_entry *dst)
+{
+ return -1;
+}
+#endif
-static int __init bond_init(struct net_device *dev)
+static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *dev)
{
- bonding_t *bond;
+ slave_t *slave, *start_at;
+ struct bonding *bond = (struct bonding *) dev->priv;
+ unsigned long flags;
- bond = kmalloc(sizeof(struct bonding), GFP_KERNEL);
- if (bond == NULL)
- return -ENOMEM;
+ if (!IS_UP(dev)) { /* bond down */
+ dev_kfree_skb(skb);
+ return 0;
+ }
- memset(bond, 0, sizeof(struct bonding));
- bond->next = (slave_t*)bond;
- bond->prev = (slave_t*)bond;
- bond->master = dev;
- bond->current_slave = (slave_t*)bond;
- dev->priv = bond;
+ read_lock_irqsave(&bond->lock, flags);
- /* Initialize the device structure. */
- dev->hard_start_xmit = bond_xmit;
- dev->get_stats = bond_get_stats;
- dev->stop = bond_close;
- dev->set_multicast_list = bond_set_multicast_list;
- dev->do_ioctl = bond_ioctl;
+ read_lock(&bond->ptrlock);
+ slave = start_at = bond->current_slave;
+ read_unlock(&bond->ptrlock);
- /* Fill in the fields of the device structure with ethernet-generic
- values. */
- ether_setup(dev);
- dev->tx_queue_len = 0;
- dev->flags |= IFF_MASTER;
+ if (slave == NULL) { /* we're at the root, get the first slave */
+ /* no suitable interface, frame not sent */
+ dev_kfree_skb(skb);
+ read_unlock_irqrestore(&bond->lock, flags);
+ return 0;
+ }
- this_bond = dev;
+ do {
+ if (IS_UP(slave->dev)
+ && (slave->link == BOND_LINK_UP)
+ && (slave->state == BOND_STATE_ACTIVE)) {
+
+ skb->dev = slave->dev;
+ skb->priority = 1;
+ dev_queue_xmit(skb);
- register_netdevice_notifier(&bond_netdev_notifier);
+ write_lock(&bond->ptrlock);
+ bond->current_slave = slave->next;
+ write_unlock(&bond->ptrlock);
+ read_unlock_irqrestore(&bond->lock, flags);
+ return 0;
+ }
+ } while ((slave = slave->next) != start_at);
+
+ /* no suitable interface, frame not sent */
+ dev_kfree_skb(skb);
+ read_unlock_irqrestore(&bond->lock, flags);
return 0;
}
-static int bond_xmit(struct sk_buff *skb, struct net_device *dev)
+/*
+ * in XOR mode, we determine the output device by performing xor on
+ * the source and destination hw adresses. If this device is not
+ * enabled, find the next slave following this xor slave.
+ */
+static int bond_xmit_xor(struct sk_buff *skb, struct net_device *dev)
{
- bonding_t *bond = dev->priv;
slave_t *slave, *start_at;
- int pkt_len = skb->len;
+ struct bonding *bond = (struct bonding *) dev->priv;
+ unsigned long flags;
+ struct ethhdr *data = (struct ethhdr *)skb->data;
+ int slave_no;
+
+ if (!IS_UP(dev)) { /* bond down */
+ dev_kfree_skb(skb);
+ return 0;
+ }
- slave = start_at = bond->current_slave;
+ read_lock_irqsave(&bond->lock, flags);
+ read_lock(&bond->ptrlock);
+ slave = bond->prev;
+
+ /* we're at the root, get the first slave */
+ if ((slave == NULL) || (slave->dev == NULL)) {
+ /* no suitable interface, frame not sent */
+ read_unlock(&bond->ptrlock);
+ dev_kfree_skb(skb);
+ read_unlock_irqrestore(&bond->lock, flags);
+ return 0;
+ }
+
+ slave_no = (data->h_dest[5]^slave->dev->dev_addr[5]) % bond->slave_cnt;
+
+ read_unlock(&bond->ptrlock);
+
+ while ( (slave_no > 0) && (slave != (slave_t *)bond) ) {
+ slave = slave->prev;
+ slave_no--;
+ }
+ start_at = slave;
do {
- if (slave == (slave_t*)bond)
- continue;
+ if (IS_UP(slave->dev)
+ && (slave->link == BOND_LINK_UP)
+ && (slave->state == BOND_STATE_ACTIVE)) {
- if (netif_running(slave->dev) && netif_carrier_ok(slave->dev)) {
- bond->current_slave = slave->next;
skb->dev = slave->dev;
+ skb->priority = 1;
+ dev_queue_xmit(skb);
- if (dev_queue_xmit(skb)) {
- bond->stats.tx_dropped++;
- } else {
- bond->stats.tx_packets++;
- bond->stats.tx_bytes += pkt_len;
- }
+ read_unlock_irqrestore(&bond->lock, flags);
return 0;
}
} while ((slave = slave->next) != start_at);
- bond->stats.tx_dropped++;
- kfree_skb(skb);
+ /* no suitable interface, frame not sent */
+ dev_kfree_skb(skb);
+ read_unlock_irqrestore(&bond->lock, flags);
+ return 0;
+}
+
+/*
+ * in active-backup mode, we know that bond->current_slave is always valid if
+ * the bond has a usable interface.
+ */
+static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *dev)
+{
+ struct bonding *bond = (struct bonding *) dev->priv;
+ unsigned long flags;
+ int ret;
+
+ if (!IS_UP(dev)) { /* bond down */
+ dev_kfree_skb(skb);
+ return 0;
+ }
+
+ /* if we are sending arp packets, try to at least
+ identify our own ip address */
+ if ( (arp_interval > 0) && (my_ip==0) &&
+ (skb->protocol == __constant_htons(ETH_P_ARP) ) ) {
+ char *the_ip = (((char *)skb->data))
+ + sizeof(struct ethhdr)
+ + sizeof(struct arphdr) +
+ ETH_ALEN;
+ memcpy(&my_ip, the_ip, 4);
+ }
+
+ /* if we are sending arp packets and don't know
+ the target hw address, save it so we don't need
+ to use a broadcast address */
+ if ( (arp_interval > 0) && (arp_target_hw_addr==NULL) &&
+ (skb->protocol == __constant_htons(ETH_P_IP) ) ) {
+ struct ethhdr *eth_hdr =
+ (struct ethhdr *) (((char *)skb->data));
+ arp_target_hw_addr = kmalloc(ETH_ALEN, GFP_KERNEL);
+ memcpy(arp_target_hw_addr, eth_hdr->h_dest, ETH_ALEN);
+ }
+
+ read_lock_irqsave(&bond->lock, flags);
+
+ read_lock(&bond->ptrlock);
+ if (bond->current_slave != NULL) { /* one usable interface */
+ skb->dev = bond->current_slave->dev;
+ read_unlock(&bond->ptrlock);
+ skb->priority = 1;
+ ret = dev_queue_xmit(skb);
+ read_unlock_irqrestore(&bond->lock, flags);
+ return 0;
+ }
+ else {
+ read_unlock(&bond->ptrlock);
+ }
+
+ /* no suitable interface, frame not sent */
+#ifdef BONDING_DEBUG
+ printk(KERN_INFO "There was no suitable interface, so we don't transmit\n");
+#endif
+ dev_kfree_skb(skb);
+ read_unlock_irqrestore(&bond->lock, flags);
return 0;
}
static struct net_device_stats *bond_get_stats(struct net_device *dev)
{
bonding_t *bond = dev->priv;
+ struct net_device_stats *stats = bond->stats, *sstats;
+ slave_t *slave;
+ unsigned long flags;
+
+ memset(bond->stats, 0, sizeof(struct net_device_stats));
+
+ read_lock_irqsave(&bond->lock, flags);
+
+ for (slave = bond->prev; slave!=(slave_t *)bond; slave = slave->prev) {
+ sstats = slave->dev->get_stats(slave->dev);
+
+ stats->rx_packets += sstats->rx_packets;
+ stats->rx_bytes += sstats->rx_bytes;
+ stats->rx_errors += sstats->rx_errors;
+ stats->rx_dropped += sstats->rx_dropped;
+
+ stats->tx_packets += sstats->tx_packets;
+ stats->tx_bytes += sstats->tx_bytes;
+ stats->tx_errors += sstats->tx_errors;
+ stats->tx_dropped += sstats->tx_dropped;
+
+ stats->multicast += sstats->multicast;
+ stats->collisions += sstats->collisions;
+
+ stats->rx_length_errors += sstats->rx_length_errors;
+ stats->rx_over_errors += sstats->rx_over_errors;
+ stats->rx_crc_errors += sstats->rx_crc_errors;
+ stats->rx_frame_errors += sstats->rx_frame_errors;
+ stats->rx_fifo_errors += sstats->rx_fifo_errors;
+ stats->rx_missed_errors += sstats->rx_missed_errors;
+
+ stats->tx_aborted_errors += sstats->tx_aborted_errors;
+ stats->tx_carrier_errors += sstats->tx_carrier_errors;
+ stats->tx_fifo_errors += sstats->tx_fifo_errors;
+ stats->tx_heartbeat_errors += sstats->tx_heartbeat_errors;
+ stats->tx_window_errors += sstats->tx_window_errors;
+
+ }
+
+ read_unlock_irqrestore(&bond->lock, flags);
+ return stats;
+}
+
+static int bond_get_info(char *buf, char **start, off_t offset, int length)
+{
+ bonding_t *bond = these_bonds;
+ int len = 0;
+ off_t begin = 0;
+ u16 link;
+ slave_t *slave = NULL;
+
+ while (bond != NULL) {
+ /*
+ * This function locks the mutex, so we can't lock it until
+ * afterwards
+ */
+ link = bond_check_mii_link(bond);
+
+ read_lock(&bond->ptrlock);
+
+ len += sprintf(buf + len, "Bonding Mode: ");
+ len += sprintf(buf + len, "%s\n", mode ? "active-backup" : "load balancing");
+
+ if (mode == BOND_MODE_ACTIVEBACKUP) {
+ if (bond->current_slave != NULL) {
+ len += sprintf(buf + len,
+ "Currently Active Slave: %s\n",
+ bond->current_slave->dev->name);
+ }
+ }
+
+ len += sprintf(buf + len, "MII Status: ");
+ len += sprintf(buf + len,
+ link == MII_LINK_READY ? "up\n" : "down\n");
+ len += sprintf(buf + len, "MII Polling Interval (ms): %d\n",
+ miimon);
+ len += sprintf(buf + len, "Up Delay (ms): %d\n", updelay);
+ len += sprintf(buf + len, "Down Delay (ms): %d\n", downdelay);
+
+ for (slave = bond->prev; slave != (slave_t *)bond;
+ slave = slave->prev) {
+ len += sprintf(buf + len, "\nSlave Interface: %s\n", slave->dev->name);
+
+ len += sprintf(buf + len, "MII Status: ");
+
+ len += sprintf(buf + len,
+ slave->link == BOND_LINK_UP ?
+ "up\n" : "down\n");
+ len += sprintf(buf + len, "Link Failure Count: %d\n",
+ slave->link_failure_count);
+ }
+
+ /*
+ * Figure out the calcs for the /proc/net interface
+ */
+ *start = buf + (offset - begin);
+ len -= (offset - begin);
+ if (len > length) {
+ len = length;
+ }
+ if (len < 0) {
+ len = 0;
+ }
+
+ read_unlock(&bond->ptrlock);
+
+ bond = bond->next_bond;
+ }
+ return len;
+}
+
+static int bond_event(struct notifier_block *this, unsigned long event,
+ void *ptr)
+{
+ struct bonding *this_bond=(struct bonding *)these_bonds;
+ struct bonding *last_bond;
+ struct net_device *event_dev = (struct net_device *)ptr;
+
+ /* while there are bonds configured */
+ while (this_bond != NULL) {
+ if (this_bond == event_dev->priv ) {
+ switch (event) {
+ case NETDEV_UNREGISTER:
+ /*
+ * remove this bond from a linked list of
+ * bonds
+ */
+ if (this_bond == these_bonds) {
+ these_bonds = this_bond->next_bond;
+ } else {
+ for (last_bond = these_bonds;
+ last_bond != NULL;
+ last_bond = last_bond->next_bond) {
+ if (last_bond->next_bond ==
+ this_bond) {
+ last_bond->next_bond =
+ this_bond->next_bond;
+ }
+ }
+ }
+ return NOTIFY_DONE;
+
+ default:
+ return NOTIFY_DONE;
+ }
+ }
+ this_bond = this_bond->next_bond;
+ }
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block bond_netdev_notifier={
+ bond_event,
+ NULL,
+ 0
+};
+
+static int __init bond_init(struct net_device *dev)
+{
+ bonding_t *bond, *this_bond, *last_bond;
- return &bond->stats;
+#ifdef BONDING_DEBUG
+ printk (KERN_INFO "Begin bond_init for %s\n", dev->name);
+#endif
+ bond = kmalloc(sizeof(struct bonding), GFP_KERNEL);
+ if (bond == NULL) {
+ return -ENOMEM;
+ }
+ memset(bond, 0, sizeof(struct bonding));
+
+ /* initialize rwlocks */
+ rwlock_init(&bond->lock);
+ rwlock_init(&bond->ptrlock);
+
+ bond->stats = kmalloc(sizeof(struct net_device_stats), GFP_KERNEL);
+ if (bond->stats == NULL) {
+ kfree(bond);
+ return -ENOMEM;
+ }
+ memset(bond->stats, 0, sizeof(struct net_device_stats));
+
+ bond->next = bond->prev = (slave_t *)bond;
+ bond->current_slave = NULL;
+ bond->device = dev;
+ dev->priv = bond;
+
+ /* Initialize the device structure. */
+ if (mode == BOND_MODE_ACTIVEBACKUP) {
+ dev->hard_start_xmit = bond_xmit_activebackup;
+ } else if (mode == BOND_MODE_ROUNDROBIN) {
+ dev->hard_start_xmit = bond_xmit_roundrobin;
+ } else if (mode == BOND_MODE_XOR) {
+ dev->hard_start_xmit = bond_xmit_xor;
+ } else {
+ printk(KERN_ERR "Unknown bonding mode %d\n", mode);
+ kfree(bond->stats);
+ kfree(bond);
+ return -EINVAL;
+ }
+
+ dev->get_stats = bond_get_stats;
+ dev->open = bond_open;
+ dev->stop = bond_close;
+ dev->set_multicast_list = set_multicast_list;
+ dev->do_ioctl = bond_ioctl;
+
+ /*
+ * Fill in the fields of the device structure with ethernet-generic
+ * values.
+ */
+
+ ether_setup(dev);
+
+ dev->tx_queue_len = 0;
+ dev->flags |= IFF_MASTER|IFF_MULTICAST;
+#ifdef CONFIG_NET_FASTROUTE
+ dev->accept_fastpath = bond_accept_fastpath;
+#endif
+
+ printk(KERN_INFO "%s registered with", dev->name);
+ if (miimon > 0) {
+ printk(" MII link monitoring set to %d ms", miimon);
+ updelay /= miimon;
+ downdelay /= miimon;
+ } else {
+ printk("out MII link monitoring");
+ }
+ printk(", in %s mode.\n",mode?"active-backup":"bonding");
+
+#ifdef CONFIG_PROC_FS
+ bond->bond_proc_dir = proc_mkdir(dev->name, proc_net);
+ if (bond->bond_proc_dir == NULL) {
+ printk(KERN_ERR "%s: Cannot init /proc/net/%s/\n",
+ dev->name, dev->name);
+ kfree(bond->stats);
+ kfree(bond);
+ return -ENOMEM;
+ }
+ bond->bond_proc_info_file =
+ create_proc_info_entry("info", 0, bond->bond_proc_dir,
+ bond_get_info);
+ if (bond->bond_proc_info_file == NULL) {
+ printk(KERN_ERR "%s: Cannot init /proc/net/%s/info\n",
+ dev->name, dev->name);
+ remove_proc_entry(dev->name, proc_net);
+ kfree(bond->stats);
+ kfree(bond);
+ return -ENOMEM;
+ }
+#endif /* CONFIG_PROC_FS */
+
+ if (first_pass == 1) {
+ these_bonds = bond;
+ register_netdevice_notifier(&bond_netdev_notifier);
+ first_pass = 0;
+ } else {
+ last_bond = these_bonds;
+ this_bond = these_bonds->next_bond;
+ while (this_bond != NULL) {
+ last_bond = this_bond;
+ this_bond = this_bond->next_bond;
+ }
+ last_bond->next_bond = bond;
+ }
+
+ return 0;
}
-static struct net_device dev_bond;
+/*
+static int __init bond_probe(struct net_device *dev)
+{
+ bond_init(dev);
+ return 0;
+}
+ */
static int __init bonding_init(void)
{
- /* Find a name for this unit */
+ int no;
int err;
-
- dev_bond.init = bond_init;
- err = dev_alloc_name(&dev_bond,"bond%d");
- if (err<0)
- return err;
-
- SET_MODULE_OWNER(&dev_bond);
- if (register_netdev(&dev_bond) != 0)
- return -EIO;
+ /* Find a name for this unit */
+ static struct net_device *dev_bond = NULL;
+ dev_bond = dev_bonds = kmalloc(max_bonds*sizeof(struct net_device),
+ GFP_KERNEL);
+ if (dev_bond == NULL) {
+ return -ENOMEM;
+ }
+ memset(dev_bonds, 0, max_bonds*sizeof(struct net_device));
+
+ if (arp_ip_target) {
+ if (my_inet_aton(arp_ip_target, &arp_target) == 0) {
+ arp_interval = 0;
+ }
+ }
+
+ for (no = 0; no < max_bonds; no++) {
+ dev_bond->init = bond_init;
+
+ err = dev_alloc_name(dev_bond,"bond%d");
+ if (err < 0) {
+ kfree(dev_bonds);
+ return err;
+ }
+ SET_MODULE_OWNER(dev_bond);
+ if (register_netdev(dev_bond) != 0) {
+ kfree(dev_bonds);
+ return -EIO;
+ }
+ dev_bond++;
+ }
return 0;
}
static void __exit bonding_exit(void)
{
- unregister_netdevice_notifier(&bond_netdev_notifier);
+ struct net_device *dev_bond = dev_bonds;
+ struct bonding *bond;
+ int no;
- unregister_netdev(&dev_bond);
+ unregister_netdevice_notifier(&bond_netdev_notifier);
+
+ for (no = 0; no < max_bonds; no++) {
- kfree(dev_bond.priv);
+#ifdef CONFIG_PROC_FS
+ bond = (struct bonding *) dev_bond->priv;
+ remove_proc_entry("info", bond->bond_proc_dir);
+ remove_proc_entry(dev_bond->name, proc_net);
+#endif
+ unregister_netdev(dev_bond);
+ kfree(bond->stats);
+ kfree(dev_bond->priv);
+
+ dev_bond->priv = NULL;
+ dev_bond++;
+ }
+ kfree(dev_bonds);
}
module_init(bonding_init);
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)