Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
new file mode 100644
index 0000000..770e28f
--- /dev/null
+++ b/drivers/net/bonding/bond_main.c
@@ -0,0 +1,4708 @@
+/*
+ * originally based on the dummy device.
+ *
+ * Copyright 1999, Thomas Davis, tadavis@lbl.gov.
+ * Licensed under the GPL. Based on dummy.c, and eql.c devices.
+ *
+ * bonding.c: an Ethernet Bonding driver
+ *
+ * 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
+ * will setup a network device, with an ip address. No mac address
+ * will be assigned at this time. The hw mac address will come from
+ * the first slave bonded to the channel. All slaves will then use
+ * this hw mac address.
+ *
+ * ifconfig bond0 down
+ * will release all slaves, marking them as down.
+ *
+ * ifenslave bond0 eth0
+ * 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.
+ *
+ * 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
+ *
+ * 2001/11/5 - Mark Huth <mark dot huth at mvista dot com>
+ * - Don't take rtnl lock in bond_mii_monitor as it deadlocks under
+ * certain hotswap conditions.
+ * Note: this same change may be required in bond_arp_monitor ???
+ * - Remove possibility of calling bond_sethwaddr with NULL slave_dev ptr
+ * - Handle hot swap ethernet interface deregistration events to remove
+ * kernel oops following hot swap of enslaved interface
+ *
+ * 2002/1/2 - Chad N. Tindel <ctindel at ieee dot org>
+ * - Restore original slave flags at release time.
+ *
+ * 2002/02/18 - Erik Habbinga <erik_habbinga at hp dot com>
+ * - bond_release(): calling kfree on our_slave after call to
+ * bond_restore_slave_flags, not before
+ * - bond_enslave(): saving slave flags into original_flags before
+ * call to netdev_set_master, so the IFF_SLAVE flag doesn't end
+ * up in original_flags
+ *
+ * 2002/04/05 - Mark Smith <mark.smith at comdev dot cc> and
+ * Steve Mead <steve.mead at comdev dot cc>
+ * - Port Gleb Natapov's multicast support patchs from 2.4.12
+ * to 2.4.18 adding support for multicast.
+ *
+ * 2002/06/10 - Tony Cureington <tony.cureington * hp_com>
+ * - corrected uninitialized pointer (ifr.ifr_data) in bond_check_dev_link;
+ * actually changed function to use MIIPHY, then MIIREG, and finally
+ * ETHTOOL to determine the link status
+ * - fixed bad ifr_data pointer assignments in bond_ioctl
+ * - corrected mode 1 being reported as active-backup in bond_get_info;
+ * also added text to distinguish type of load balancing (rr or xor)
+ * - change arp_ip_target module param from "1-12s" (array of 12 ptrs)
+ * to "s" (a single ptr)
+ *
+ * 2002/08/30 - Jay Vosburgh <fubar at us dot ibm dot com>
+ * - Removed acquisition of xmit_lock in set_multicast_list; caused
+ * deadlock on SMP (lock is held by caller).
+ * - Revamped SIOCGMIIPHY, SIOCGMIIREG portion of bond_check_dev_link().
+ *
+ * 2002/09/18 - Jay Vosburgh <fubar at us dot ibm dot com>
+ * - Fixed up bond_check_dev_link() (and callers): removed some magic
+ * numbers, banished local MII_ defines, wrapped ioctl calls to
+ * prevent EFAULT errors
+ *
+ * 2002/9/30 - Jay Vosburgh <fubar at us dot ibm dot com>
+ * - make sure the ip target matches the arp_target before saving the
+ * hw address.
+ *
+ * 2002/9/30 - Dan Eisner <eisner at 2robots dot com>
+ * - make sure my_ip is set before taking down the link, since
+ * not all switches respond if the source ip is not set.
+ *
+ * 2002/10/8 - Janice Girouard <girouard at us dot ibm dot com>
+ * - read in the local ip address when enslaving a device
+ * - add primary support
+ * - make sure 2*arp_interval has passed when a new device
+ * is brought on-line before taking it down.
+ *
+ * 2002/09/11 - Philippe De Muyter <phdm at macqel dot be>
+ * - Added bond_xmit_broadcast logic.
+ * - Added bond_mode() support function.
+ *
+ * 2002/10/26 - Laurent Deniel <laurent.deniel at free.fr>
+ * - allow to register multicast addresses only on active slave
+ * (useful in active-backup mode)
+ * - add multicast module parameter
+ * - fix deletion of multicast groups after unloading module
+ *
+ * 2002/11/06 - Kameshwara Rayaprolu <kameshwara.rao * wipro_com>
+ * - Changes to prevent panic from closing the device twice; if we close
+ * the device in bond_release, we must set the original_flags to down
+ * so it won't be closed again by the network layer.
+ *
+ * 2002/11/07 - Tony Cureington <tony.cureington * hp_com>
+ * - Fix arp_target_hw_addr memory leak
+ * - Created activebackup_arp_monitor function to handle arp monitoring
+ * in active backup mode - the bond_arp_monitor had several problems...
+ * such as allowing slaves to tx arps sequentially without any delay
+ * for a response
+ * - Renamed bond_arp_monitor to loadbalance_arp_monitor and re-wrote
+ * this function to just handle arp monitoring in load-balancing mode;
+ * it is a lot more compact now
+ * - Changes to ensure one and only one slave transmits in active-backup
+ * mode
+ * - Robustesize parameters; warn users about bad combinations of
+ * parameters; also if miimon is specified and a network driver does
+ * not support MII or ETHTOOL, inform the user of this
+ * - Changes to support link_failure_count when in arp monitoring mode
+ * - Fix up/down delay reported in /proc
+ * - Added version; log version; make version available from "modinfo -d"
+ * - Fixed problem in bond_check_dev_link - if the first IOCTL (SIOCGMIIPH)
+ * failed, the ETHTOOL ioctl never got a chance
+ *
+ * 2002/11/16 - Laurent Deniel <laurent.deniel at free.fr>
+ * - fix multicast handling in activebackup_arp_monitor
+ * - remove one unnecessary and confusing curr_active_slave == slave test
+ * in activebackup_arp_monitor
+ *
+ * 2002/11/17 - Laurent Deniel <laurent.deniel at free.fr>
+ * - fix bond_slave_info_query when slave_id = num_slaves
+ *
+ * 2002/11/19 - Janice Girouard <girouard at us dot ibm dot com>
+ * - correct ifr_data reference. Update ifr_data reference
+ * to mii_ioctl_data struct values to avoid confusion.
+ *
+ * 2002/11/22 - Bert Barbe <bert.barbe at oracle dot com>
+ * - Add support for multiple arp_ip_target
+ *
+ * 2002/12/13 - Jay Vosburgh <fubar at us dot ibm dot com>
+ * - Changed to allow text strings for mode and multicast, e.g.,
+ * insmod bonding mode=active-backup. The numbers still work.
+ * One change: an invalid choice will cause module load failure,
+ * rather than the previous behavior of just picking one.
+ * - Minor cleanups; got rid of dup ctype stuff, atoi function
+ *
+ * 2003/02/07 - Jay Vosburgh <fubar at us dot ibm dot com>
+ * - Added use_carrier module parameter that causes miimon to
+ * use netif_carrier_ok() test instead of MII/ETHTOOL ioctls.
+ * - Minor cleanups; consolidated ioctl calls to one function.
+ *
+ * 2003/02/07 - Tony Cureington <tony.cureington * hp_com>
+ * - Fix bond_mii_monitor() logic error that could result in
+ * bonding round-robin mode ignoring links after failover/recovery
+ *
+ * 2003/03/17 - Jay Vosburgh <fubar at us dot ibm dot com>
+ * - kmalloc fix (GFP_KERNEL to GFP_ATOMIC) reported by
+ * Shmulik dot Hen at intel.com.
+ * - Based on discussion on mailing list, changed use of
+ * update_slave_cnt(), created wrapper functions for adding/removing
+ * slaves, changed bond_xmit_xor() to check slave_cnt instead of
+ * checking slave and slave->dev (which only worked by accident).
+ * - Misc code cleanup: get arp_send() prototype from header file,
+ * add max_bonds to bonding.txt.
+ *
+ * 2003/03/18 - Tsippy Mendelson <tsippy.mendelson at intel dot com> and
+ * Shmulik Hen <shmulik.hen at intel dot com>
+ * - Make sure only bond_attach_slave() and bond_detach_slave() can
+ * manipulate the slave list, including slave_cnt, even when in
+ * bond_release_all().
+ * - Fixed hang in bond_release() with traffic running:
+ * netdev_set_master() must not be called from within the bond lock.
+ *
+ * 2003/03/18 - Tsippy Mendelson <tsippy.mendelson at intel dot com> and
+ * Shmulik Hen <shmulik.hen at intel dot com>
+ * - Fixed hang in bond_enslave() with traffic running:
+ * netdev_set_master() must not be called from within the bond lock.
+ *
+ * 2003/03/18 - Amir Noam <amir.noam at intel dot com>
+ * - Added support for getting slave's speed and duplex via ethtool.
+ * Needed for 802.3ad and other future modes.
+ *
+ * 2003/03/18 - Tsippy Mendelson <tsippy.mendelson at intel dot com> and
+ * Shmulik Hen <shmulik.hen at intel dot com>
+ * - Enable support of modes that need to use the unique mac address of
+ * each slave.
+ * * bond_enslave(): Moved setting the slave's mac address, and
+ * openning it, from the application to the driver. This breaks
+ * backward comaptibility with old versions of ifenslave that open
+ * the slave before enalsving it !!!.
+ * * bond_release(): The driver also takes care of closing the slave
+ * and restoring its original mac address.
+ * - Removed the code that restores all base driver's flags.
+ * Flags are automatically restored once all undo stages are done
+ * properly.
+ * - Block possibility of enslaving before the master is up. This
+ * prevents putting the system in an unstable state.
+ *
+ * 2003/03/18 - Amir Noam <amir.noam at intel dot com>,
+ * Tsippy Mendelson <tsippy.mendelson at intel dot com> and
+ * Shmulik Hen <shmulik.hen at intel dot com>
+ * - Added support for IEEE 802.3ad Dynamic link aggregation mode.
+ *
+ * 2003/05/01 - Amir Noam <amir.noam at intel dot com>
+ * - Added ABI version control to restore compatibility between
+ * new/old ifenslave and new/old bonding.
+ *
+ * 2003/05/01 - Shmulik Hen <shmulik.hen at intel dot com>
+ * - Fixed bug in bond_release_all(): save old value of curr_active_slave
+ * before setting it to NULL.
+ * - Changed driver versioning scheme to include version number instead
+ * of release date (that is already in another field). There are 3
+ * fields X.Y.Z where:
+ * X - Major version - big behavior changes
+ * Y - Minor version - addition of features
+ * Z - Extra version - minor changes and bug fixes
+ * The current version is 1.0.0 as a base line.
+ *
+ * 2003/05/01 - Tsippy Mendelson <tsippy.mendelson at intel dot com> and
+ * Amir Noam <amir.noam at intel dot com>
+ * - Added support for lacp_rate module param.
+ * - Code beautification and style changes (mainly in comments).
+ * new version - 1.0.1
+ *
+ * 2003/05/01 - Shmulik Hen <shmulik.hen at intel dot com>
+ * - Based on discussion on mailing list, changed locking scheme
+ * to use lock/unlock or lock_bh/unlock_bh appropriately instead
+ * of lock_irqsave/unlock_irqrestore. The new scheme helps exposing
+ * hidden bugs and solves system hangs that occurred due to the fact
+ * that holding lock_irqsave doesn't prevent softirqs from running.
+ * This also increases total throughput since interrupts are not
+ * blocked on each transmitted packets or monitor timeout.
+ * new version - 2.0.0
+ *
+ * 2003/05/01 - Shmulik Hen <shmulik.hen at intel dot com>
+ * - Added support for Transmit load balancing mode.
+ * - Concentrate all assignments of curr_active_slave to a single point
+ * so specific modes can take actions when the primary adapter is
+ * changed.
+ * - Take the updelay parameter into consideration during bond_enslave
+ * since some adapters loose their link during setting the device.
+ * - Renamed bond_3ad_link_status_changed() to
+ * bond_3ad_handle_link_change() for compatibility with TLB.
+ * new version - 2.1.0
+ *
+ * 2003/05/01 - Tsippy Mendelson <tsippy.mendelson at intel dot com>
+ * - Added support for Adaptive load balancing mode which is
+ * equivalent to Transmit load balancing + Receive load balancing.
+ * new version - 2.2.0
+ *
+ * 2003/05/15 - Jay Vosburgh <fubar at us dot ibm dot com>
+ * - Applied fix to activebackup_arp_monitor posted to bonding-devel
+ * by Tony Cureington <tony.cureington * hp_com>. Fixes ARP
+ * monitor endless failover bug. Version to 2.2.10
+ *
+ * 2003/05/20 - Amir Noam <amir.noam at intel dot com>
+ * - Fixed bug in ABI version control - Don't commit to a specific
+ * ABI version if receiving unsupported ioctl commands.
+ *
+ * 2003/05/22 - Jay Vosburgh <fubar at us dot ibm dot com>
+ * - Fix ifenslave -c causing bond to loose existing routes;
+ * added bond_set_mac_address() that doesn't require the
+ * bond to be down.
+ * - In conjunction with fix for ifenslave -c, in
+ * bond_change_active(), changing to the already active slave
+ * is no longer an error (it successfully does nothing).
+ *
+ * 2003/06/30 - Amir Noam <amir.noam at intel dot com>
+ * - Fixed bond_change_active() for ALB/TLB modes.
+ * Version to 2.2.14.
+ *
+ * 2003/07/29 - Amir Noam <amir.noam at intel dot com>
+ * - Fixed ARP monitoring bug.
+ * Version to 2.2.15.
+ *
+ * 2003/07/31 - Willy Tarreau <willy at ods dot org>
+ * - Fixed kernel panic when using ARP monitoring without
+ * setting bond's IP address.
+ * Version to 2.2.16.
+ *
+ * 2003/08/06 - Amir Noam <amir.noam at intel dot com>
+ * - Back port from 2.6: use alloc_netdev(); fix /proc handling;
+ * made stats a part of bond struct so no need to allocate
+ * and free it separately; use standard list operations instead
+ * of pre-allocated array of bonds.
+ * Version to 2.3.0.
+ *
+ * 2003/08/07 - Jay Vosburgh <fubar at us dot ibm dot com>,
+ * Amir Noam <amir.noam at intel dot com> and
+ * Shmulik Hen <shmulik.hen at intel dot com>
+ * - Propagating master's settings: Distinguish between modes that
+ * use a primary slave from those that don't, and propagate settings
+ * accordingly; Consolidate change_active opeartions and add
+ * reselect_active and find_best opeartions; Decouple promiscuous
+ * handling from the multicast mode setting; Add support for changing
+ * HW address and MTU with proper unwind; Consolidate procfs code,
+ * add CHANGENAME handler; Enhance netdev notification handling.
+ * Version to 2.4.0.
+ *
+ * 2003/09/15 - Stephen Hemminger <shemminger at osdl dot org>,
+ * Amir Noam <amir.noam at intel dot com>
+ * - Convert /proc to seq_file interface.
+ * Change /proc/net/bondX/info to /proc/net/bonding/bondX.
+ * Set version to 2.4.1.
+ *
+ * 2003/11/20 - Amir Noam <amir.noam at intel dot com>
+ * - Fix /proc creation/destruction.
+ *
+ * 2003/12/01 - Shmulik Hen <shmulik.hen at intel dot com>
+ * - Massive cleanup - Set version to 2.5.0
+ * Code changes:
+ * o Consolidate format of prints and debug prints.
+ * o Remove bonding_t/slave_t typedefs and consolidate all casts.
+ * o Remove dead code and unnecessary checks.
+ * o Consolidate starting/stopping timers.
+ * o Consolidate handling of primary module param throughout the code.
+ * o Removed multicast module param support - all settings are done
+ * according to mode.
+ * o Slave list iteration - bond is no longer part of the list,
+ * added cyclic list iteration macros.
+ * o Consolidate error handling in all xmit functions.
+ * Style changes:
+ * o Consolidate function naming and declarations.
+ * o Consolidate function params and local variables names.
+ * o Consolidate return values.
+ * o Consolidate curly braces.
+ * o Consolidate conditionals format.
+ * o Change struct member names and types.
+ * o Chomp trailing spaces, remove empty lines, fix indentations.
+ * o Re-organize code according to context.
+ *
+ * 2003/12/30 - Amir Noam <amir.noam at intel dot com>
+ * - Fixed: Cannot remove and re-enslave the original active slave.
+ * - Fixed: Releasing the original active slave causes mac address
+ * duplication.
+ * - Add support for slaves that use ethtool_ops.
+ * Set version to 2.5.3.
+ *
+ * 2004/01/05 - Amir Noam <amir.noam at intel dot com>
+ * - Save bonding parameters per bond instead of using the global values.
+ * Set version to 2.5.4.
+ *
+ * 2004/01/14 - Shmulik Hen <shmulik.hen at intel dot com>
+ * - Enhance VLAN support:
+ * * Add support for VLAN hardware acceleration capable slaves.
+ * * Add capability to tag self generated packets in ALB/TLB modes.
+ * Set version to 2.6.0.
+ * 2004/10/29 - Mitch Williams <mitch.a.williams at intel dot com>
+ * - Fixed bug when unloading module while using 802.3ad. If
+ * spinlock debugging is turned on, this causes a stack dump.
+ * Solution is to move call to dev_remove_pack outside of the
+ * spinlock.
+ * Set version to 2.6.1.
+ *
+ */
+
+//#define BONDING_DEBUG 1
+
+#include <linux/config.h>
+#include <linux/kernel.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/ip.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/init.h>
+#include <linux/timer.h>
+#include <linux/socket.h>
+#include <linux/ctype.h>
+#include <linux/inet.h>
+#include <linux/bitops.h>
+#include <asm/system.h>
+#include <asm/io.h>
+#include <asm/dma.h>
+#include <asm/uaccess.h>
+#include <linux/errno.h>
+#include <linux/netdevice.h>
+#include <linux/inetdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <net/sock.h>
+#include <linux/rtnetlink.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <linux/smp.h>
+#include <linux/if_ether.h>
+#include <net/arp.h>
+#include <linux/mii.h>
+#include <linux/ethtool.h>
+#include <linux/if_vlan.h>
+#include <linux/if_bonding.h>
+#include "bonding.h"
+#include "bond_3ad.h"
+#include "bond_alb.h"
+
+/*---------------------------- Module parameters ----------------------------*/
+
+/* monitor all links that often (in milliseconds). <=0 disables monitoring */
+#define BOND_LINK_MON_INTERV 0
+#define BOND_LINK_ARP_INTERV 0
+
+static int max_bonds = BOND_DEFAULT_MAX_BONDS;
+static int miimon = BOND_LINK_MON_INTERV;
+static int updelay = 0;
+static int downdelay = 0;
+static int use_carrier = 1;
+static char *mode = NULL;
+static char *primary = NULL;
+static char *lacp_rate = NULL;
+static int arp_interval = BOND_LINK_ARP_INTERV;
+static char *arp_ip_target[BOND_MAX_ARP_TARGETS] = { NULL, };
+
+module_param(max_bonds, int, 0);
+MODULE_PARM_DESC(max_bonds, "Max number of bonded devices");
+module_param(miimon, int, 0);
+MODULE_PARM_DESC(miimon, "Link check interval in milliseconds");
+module_param(updelay, int, 0);
+MODULE_PARM_DESC(updelay, "Delay before considering link up, in milliseconds");
+module_param(downdelay, int, 0);
+MODULE_PARM_DESC(downdelay, "Delay before considering link down, in milliseconds");
+module_param(use_carrier, int, 0);
+MODULE_PARM_DESC(use_carrier, "Use netif_carrier_ok (vs MII ioctls) in miimon; 0 for off, 1 for on (default)");
+module_param(mode, charp, 0);
+MODULE_PARM_DESC(mode, "Mode of operation : 0 for round robin, 1 for active-backup, 2 for xor");
+module_param(primary, charp, 0);
+MODULE_PARM_DESC(primary, "Primary network device to use");
+module_param(lacp_rate, charp, 0);
+MODULE_PARM_DESC(lacp_rate, "LACPDU tx rate to request from 802.3ad partner (slow/fast)");
+module_param(arp_interval, int, 0);
+MODULE_PARM_DESC(arp_interval, "arp interval in milliseconds");
+module_param_array(arp_ip_target, charp, NULL, 0);
+MODULE_PARM_DESC(arp_ip_target, "arp targets in n.n.n.n form");
+
+/*----------------------------- Global variables ----------------------------*/
+
+static const char *version =
+ DRV_DESCRIPTION ": v" DRV_VERSION " (" DRV_RELDATE ")\n";
+
+static LIST_HEAD(bond_dev_list);
+
+#ifdef CONFIG_PROC_FS
+static struct proc_dir_entry *bond_proc_dir = NULL;
+#endif
+
+static u32 arp_target[BOND_MAX_ARP_TARGETS] = { 0, } ;
+static int arp_ip_count = 0;
+static u32 my_ip = 0;
+static int bond_mode = BOND_MODE_ROUNDROBIN;
+static int lacp_fast = 0;
+static int app_abi_ver = 0;
+static int orig_app_abi_ver = -1; /* This is used to save the first ABI version
+ * we receive from the application. Once set,
+ * it won't be changed, and the module will
+ * refuse to enslave/release interfaces if the
+ * command comes from an application using
+ * another ABI version.
+ */
+
+struct bond_parm_tbl {
+ char *modename;
+ int mode;
+};
+
+static struct bond_parm_tbl bond_lacp_tbl[] = {
+{ "slow", AD_LACP_SLOW},
+{ "fast", AD_LACP_FAST},
+{ NULL, -1},
+};
+
+static struct bond_parm_tbl bond_mode_tbl[] = {
+{ "balance-rr", BOND_MODE_ROUNDROBIN},
+{ "active-backup", BOND_MODE_ACTIVEBACKUP},
+{ "balance-xor", BOND_MODE_XOR},
+{ "broadcast", BOND_MODE_BROADCAST},
+{ "802.3ad", BOND_MODE_8023AD},
+{ "balance-tlb", BOND_MODE_TLB},
+{ "balance-alb", BOND_MODE_ALB},
+{ NULL, -1},
+};
+
+/*-------------------------- Forward declarations ---------------------------*/
+
+static inline void bond_set_mode_ops(struct net_device *bond_dev, int mode);
+
+/*---------------------------- General routines -----------------------------*/
+
+static const char *bond_mode_name(int mode)
+{
+ switch (mode) {
+ case BOND_MODE_ROUNDROBIN :
+ return "load balancing (round-robin)";
+ case BOND_MODE_ACTIVEBACKUP :
+ return "fault-tolerance (active-backup)";
+ case BOND_MODE_XOR :
+ return "load balancing (xor)";
+ case BOND_MODE_BROADCAST :
+ return "fault-tolerance (broadcast)";
+ case BOND_MODE_8023AD:
+ return "IEEE 802.3ad Dynamic link aggregation";
+ case BOND_MODE_TLB:
+ return "transmit load balancing";
+ case BOND_MODE_ALB:
+ return "adaptive load balancing";
+ default:
+ return "unknown";
+ }
+}
+
+/*---------------------------------- VLAN -----------------------------------*/
+
+/**
+ * bond_add_vlan - add a new vlan id on bond
+ * @bond: bond that got the notification
+ * @vlan_id: the vlan id to add
+ *
+ * Returns -ENOMEM if allocation failed.
+ */
+static int bond_add_vlan(struct bonding *bond, unsigned short vlan_id)
+{
+ struct vlan_entry *vlan;
+
+ dprintk("bond: %s, vlan id %d\n",
+ (bond ? bond->dev->name: "None"), vlan_id);
+
+ vlan = kmalloc(sizeof(struct vlan_entry), GFP_KERNEL);
+ if (!vlan) {
+ return -ENOMEM;
+ }
+
+ INIT_LIST_HEAD(&vlan->vlan_list);
+ vlan->vlan_id = vlan_id;
+
+ write_lock_bh(&bond->lock);
+
+ list_add_tail(&vlan->vlan_list, &bond->vlan_list);
+
+ write_unlock_bh(&bond->lock);
+
+ dprintk("added VLAN ID %d on bond %s\n", vlan_id, bond->dev->name);
+
+ return 0;
+}
+
+/**
+ * bond_del_vlan - delete a vlan id from bond
+ * @bond: bond that got the notification
+ * @vlan_id: the vlan id to delete
+ *
+ * returns -ENODEV if @vlan_id was not found in @bond.
+ */
+static int bond_del_vlan(struct bonding *bond, unsigned short vlan_id)
+{
+ struct vlan_entry *vlan, *next;
+ int res = -ENODEV;
+
+ dprintk("bond: %s, vlan id %d\n", bond->dev->name, vlan_id);
+
+ write_lock_bh(&bond->lock);
+
+ list_for_each_entry_safe(vlan, next, &bond->vlan_list, vlan_list) {
+ if (vlan->vlan_id == vlan_id) {
+ list_del(&vlan->vlan_list);
+
+ if ((bond->params.mode == BOND_MODE_TLB) ||
+ (bond->params.mode == BOND_MODE_ALB)) {
+ bond_alb_clear_vlan(bond, vlan_id);
+ }
+
+ dprintk("removed VLAN ID %d from bond %s\n", vlan_id,
+ bond->dev->name);
+
+ kfree(vlan);
+
+ if (list_empty(&bond->vlan_list) &&
+ (bond->slave_cnt == 0)) {
+ /* Last VLAN removed and no slaves, so
+ * restore block on adding VLANs. This will
+ * be removed once new slaves that are not
+ * VLAN challenged will be added.
+ */
+ bond->dev->features |= NETIF_F_VLAN_CHALLENGED;
+ }
+
+ res = 0;
+ goto out;
+ }
+ }
+
+ dprintk("couldn't find VLAN ID %d in bond %s\n", vlan_id,
+ bond->dev->name);
+
+out:
+ write_unlock_bh(&bond->lock);
+ return res;
+}
+
+/**
+ * bond_has_challenged_slaves
+ * @bond: the bond we're working on
+ *
+ * Searches the slave list. Returns 1 if a vlan challenged slave
+ * was found, 0 otherwise.
+ *
+ * Assumes bond->lock is held.
+ */
+static int bond_has_challenged_slaves(struct bonding *bond)
+{
+ struct slave *slave;
+ int i;
+
+ bond_for_each_slave(bond, slave, i) {
+ if (slave->dev->features & NETIF_F_VLAN_CHALLENGED) {
+ dprintk("found VLAN challenged slave - %s\n",
+ slave->dev->name);
+ return 1;
+ }
+ }
+
+ dprintk("no VLAN challenged slaves found\n");
+ return 0;
+}
+
+/**
+ * bond_next_vlan - safely skip to the next item in the vlans list.
+ * @bond: the bond we're working on
+ * @curr: item we're advancing from
+ *
+ * Returns %NULL if list is empty, bond->next_vlan if @curr is %NULL,
+ * or @curr->next otherwise (even if it is @curr itself again).
+ *
+ * Caller must hold bond->lock
+ */
+struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr)
+{
+ struct vlan_entry *next, *last;
+
+ if (list_empty(&bond->vlan_list)) {
+ return NULL;
+ }
+
+ if (!curr) {
+ next = list_entry(bond->vlan_list.next,
+ struct vlan_entry, vlan_list);
+ } else {
+ last = list_entry(bond->vlan_list.prev,
+ struct vlan_entry, vlan_list);
+ if (last == curr) {
+ next = list_entry(bond->vlan_list.next,
+ struct vlan_entry, vlan_list);
+ } else {
+ next = list_entry(curr->vlan_list.next,
+ struct vlan_entry, vlan_list);
+ }
+ }
+
+ return next;
+}
+
+/**
+ * bond_dev_queue_xmit - Prepare skb for xmit.
+ *
+ * @bond: bond device that got this skb for tx.
+ * @skb: hw accel VLAN tagged skb to transmit
+ * @slave_dev: slave that is supposed to xmit this skbuff
+ *
+ * When the bond gets an skb to transmit that is
+ * already hardware accelerated VLAN tagged, and it
+ * needs to relay this skb to a slave that is not
+ * hw accel capable, the skb needs to be "unaccelerated",
+ * i.e. strip the hwaccel tag and re-insert it as part
+ * of the payload.
+ */
+int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev)
+{
+ unsigned short vlan_id;
+
+ if (!list_empty(&bond->vlan_list) &&
+ !(slave_dev->features & NETIF_F_HW_VLAN_TX) &&
+ vlan_get_tag(skb, &vlan_id) == 0) {
+ skb->dev = slave_dev;
+ skb = vlan_put_tag(skb, vlan_id);
+ if (!skb) {
+ /* vlan_put_tag() frees the skb in case of error,
+ * so return success here so the calling functions
+ * won't attempt to free is again.
+ */
+ return 0;
+ }
+ } else {
+ skb->dev = slave_dev;
+ }
+
+ skb->priority = 1;
+ dev_queue_xmit(skb);
+
+ return 0;
+}
+
+/*
+ * In the following 3 functions, bond_vlan_rx_register(), bond_vlan_rx_add_vid
+ * and bond_vlan_rx_kill_vid, We don't protect the slave list iteration with a
+ * lock because:
+ * a. This operation is performed in IOCTL context,
+ * b. The operation is protected by the RTNL semaphore in the 8021q code,
+ * c. Holding a lock with BH disabled while directly calling a base driver
+ * entry point is generally a BAD idea.
+ *
+ * The design of synchronization/protection for this operation in the 8021q
+ * module is good for one or more VLAN devices over a single physical device
+ * and cannot be extended for a teaming solution like bonding, so there is a
+ * potential race condition here where a net device from the vlan group might
+ * be referenced (either by a base driver or the 8021q code) while it is being
+ * removed from the system. However, it turns out we're not making matters
+ * worse, and if it works for regular VLAN usage it will work here too.
+*/
+
+/**
+ * bond_vlan_rx_register - Propagates registration to slaves
+ * @bond_dev: bonding net device that got called
+ * @grp: vlan group being registered
+ */
+static void bond_vlan_rx_register(struct net_device *bond_dev, struct vlan_group *grp)
+{
+ struct bonding *bond = bond_dev->priv;
+ struct slave *slave;
+ int i;
+
+ bond->vlgrp = grp;
+
+ bond_for_each_slave(bond, slave, i) {
+ struct net_device *slave_dev = slave->dev;
+
+ if ((slave_dev->features & NETIF_F_HW_VLAN_RX) &&
+ slave_dev->vlan_rx_register) {
+ slave_dev->vlan_rx_register(slave_dev, grp);
+ }
+ }
+}
+
+/**
+ * bond_vlan_rx_add_vid - Propagates adding an id to slaves
+ * @bond_dev: bonding net device that got called
+ * @vid: vlan id being added
+ */
+static void bond_vlan_rx_add_vid(struct net_device *bond_dev, uint16_t vid)
+{
+ struct bonding *bond = bond_dev->priv;
+ struct slave *slave;
+ int i, res;
+
+ bond_for_each_slave(bond, slave, i) {
+ struct net_device *slave_dev = slave->dev;
+
+ if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) &&
+ slave_dev->vlan_rx_add_vid) {
+ slave_dev->vlan_rx_add_vid(slave_dev, vid);
+ }
+ }
+
+ res = bond_add_vlan(bond, vid);
+ if (res) {
+ printk(KERN_ERR DRV_NAME
+ ": %s: Failed to add vlan id %d\n",
+ bond_dev->name, vid);
+ }
+}
+
+/**
+ * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves
+ * @bond_dev: bonding net device that got called
+ * @vid: vlan id being removed
+ */
+static void bond_vlan_rx_kill_vid(struct net_device *bond_dev, uint16_t vid)
+{
+ struct bonding *bond = bond_dev->priv;
+ struct slave *slave;
+ struct net_device *vlan_dev;
+ int i, res;
+
+ bond_for_each_slave(bond, slave, i) {
+ struct net_device *slave_dev = slave->dev;
+
+ if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) &&
+ slave_dev->vlan_rx_kill_vid) {
+ /* Save and then restore vlan_dev in the grp array,
+ * since the slave's driver might clear it.
+ */
+ vlan_dev = bond->vlgrp->vlan_devices[vid];
+ slave_dev->vlan_rx_kill_vid(slave_dev, vid);
+ bond->vlgrp->vlan_devices[vid] = vlan_dev;
+ }
+ }
+
+ res = bond_del_vlan(bond, vid);
+ if (res) {
+ printk(KERN_ERR DRV_NAME
+ ": %s: Failed to remove vlan id %d\n",
+ bond_dev->name, vid);
+ }
+}
+
+static void bond_add_vlans_on_slave(struct bonding *bond, struct net_device *slave_dev)
+{
+ struct vlan_entry *vlan;
+
+ write_lock_bh(&bond->lock);
+
+ if (list_empty(&bond->vlan_list)) {
+ goto out;
+ }
+
+ if ((slave_dev->features & NETIF_F_HW_VLAN_RX) &&
+ slave_dev->vlan_rx_register) {
+ slave_dev->vlan_rx_register(slave_dev, bond->vlgrp);
+ }
+
+ if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) ||
+ !(slave_dev->vlan_rx_add_vid)) {
+ goto out;
+ }
+
+ list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
+ slave_dev->vlan_rx_add_vid(slave_dev, vlan->vlan_id);
+ }
+
+out:
+ write_unlock_bh(&bond->lock);
+}
+
+static void bond_del_vlans_from_slave(struct bonding *bond, struct net_device *slave_dev)
+{
+ struct vlan_entry *vlan;
+ struct net_device *vlan_dev;
+
+ write_lock_bh(&bond->lock);
+
+ if (list_empty(&bond->vlan_list)) {
+ goto out;
+ }
+
+ if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) ||
+ !(slave_dev->vlan_rx_kill_vid)) {
+ goto unreg;
+ }
+
+ list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
+ /* Save and then restore vlan_dev in the grp array,
+ * since the slave's driver might clear it.
+ */
+ vlan_dev = bond->vlgrp->vlan_devices[vlan->vlan_id];
+ slave_dev->vlan_rx_kill_vid(slave_dev, vlan->vlan_id);
+ bond->vlgrp->vlan_devices[vlan->vlan_id] = vlan_dev;
+ }
+
+unreg:
+ if ((slave_dev->features & NETIF_F_HW_VLAN_RX) &&
+ slave_dev->vlan_rx_register) {
+ slave_dev->vlan_rx_register(slave_dev, NULL);
+ }
+
+out:
+ write_unlock_bh(&bond->lock);
+}
+
+/*------------------------------- Link status -------------------------------*/
+
+/*
+ * Get link speed and duplex from the slave's base driver
+ * using ethtool. If for some reason the call fails or the
+ * values are invalid, fake speed and duplex to 100/Full
+ * and return error.
+ */
+static int bond_update_speed_duplex(struct slave *slave)
+{
+ struct net_device *slave_dev = slave->dev;
+ static int (* ioctl)(struct net_device *, struct ifreq *, int);
+ struct ifreq ifr;
+ struct ethtool_cmd etool;
+
+ /* Fake speed and duplex */
+ slave->speed = SPEED_100;
+ slave->duplex = DUPLEX_FULL;
+
+ if (slave_dev->ethtool_ops) {
+ u32 res;
+
+ if (!slave_dev->ethtool_ops->get_settings) {
+ return -1;
+ }
+
+ res = slave_dev->ethtool_ops->get_settings(slave_dev, &etool);
+ if (res < 0) {
+ return -1;
+ }
+
+ goto verify;
+ }
+
+ ioctl = slave_dev->do_ioctl;
+ strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ);
+ etool.cmd = ETHTOOL_GSET;
+ ifr.ifr_data = (char*)&etool;
+ if (!ioctl || (IOCTL(slave_dev, &ifr, SIOCETHTOOL) < 0)) {
+ return -1;
+ }
+
+verify:
+ switch (etool.speed) {
+ case SPEED_10:
+ case SPEED_100:
+ case SPEED_1000:
+ break;
+ default:
+ return -1;
+ }
+
+ switch (etool.duplex) {
+ case DUPLEX_FULL:
+ case DUPLEX_HALF:
+ break;
+ default:
+ return -1;
+ }
+
+ slave->speed = etool.speed;
+ slave->duplex = etool.duplex;
+
+ return 0;
+}
+
+/*
+ * if <dev> supports MII link status reporting, check its link status.
+ *
+ * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(),
+ * depening upon the setting of the use_carrier parameter.
+ *
+ * Return either BMSR_LSTATUS, meaning that the link is up (or we
+ * can't tell and just pretend it is), or 0, meaning that the link is
+ * down.
+ *
+ * If reporting is non-zero, instead of faking link up, return -1 if
+ * both ETHTOOL and MII ioctls fail (meaning the device does not
+ * support them). If use_carrier is set, return whatever it says.
+ * It'd be nice if there was a good way to tell if a driver supports
+ * netif_carrier, but there really isn't.
+ */
+static int bond_check_dev_link(struct bonding *bond, struct net_device *slave_dev, int reporting)
+{
+ static int (* ioctl)(struct net_device *, struct ifreq *, int);
+ struct ifreq ifr;
+ struct mii_ioctl_data *mii;
+ struct ethtool_value etool;
+
+ if (bond->params.use_carrier) {
+ return netif_carrier_ok(slave_dev) ? BMSR_LSTATUS : 0;
+ }
+
+ ioctl = slave_dev->do_ioctl;
+ if (ioctl) {
+ /* TODO: set pointer to correct ioctl on a per team member */
+ /* bases to make this more efficient. that is, once */
+ /* we determine the correct ioctl, we will always */
+ /* call it and not the others for that team */
+ /* member. */
+
+ /*
+ * We cannot assume that SIOCGMIIPHY will also read a
+ * register; not all network drivers (e.g., e100)
+ * support that.
+ */
+
+ /* Yes, the mii is overlaid on the ifreq.ifr_ifru */
+ strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ);
+ mii = if_mii(&ifr);
+ if (IOCTL(slave_dev, &ifr, SIOCGMIIPHY) == 0) {
+ mii->reg_num = MII_BMSR;
+ if (IOCTL(slave_dev, &ifr, SIOCGMIIREG) == 0) {
+ return (mii->val_out & BMSR_LSTATUS);
+ }
+ }
+ }
+
+ /* try SIOCETHTOOL ioctl, some drivers cache ETHTOOL_GLINK */
+ /* for a period of time so we attempt to get link status */
+ /* from it last if the above MII ioctls fail... */
+ if (slave_dev->ethtool_ops) {
+ if (slave_dev->ethtool_ops->get_link) {
+ u32 link;
+
+ link = slave_dev->ethtool_ops->get_link(slave_dev);
+
+ return link ? BMSR_LSTATUS : 0;
+ }
+ }
+
+ if (ioctl) {
+ strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ);
+ etool.cmd = ETHTOOL_GLINK;
+ ifr.ifr_data = (char*)&etool;
+ if (IOCTL(slave_dev, &ifr, SIOCETHTOOL) == 0) {
+ if (etool.data == 1) {
+ return BMSR_LSTATUS;
+ } else {
+ dprintk("SIOCETHTOOL shows link down\n");
+ return 0;
+ }
+ }
+ }
+
+ /*
+ * If reporting, report that either there's no dev->do_ioctl,
+ * or both SIOCGMIIREG and SIOCETHTOOL failed (meaning that we
+ * cannot report link status). If not reporting, pretend
+ * we're ok.
+ */
+ return (reporting ? -1 : BMSR_LSTATUS);
+}
+
+/*----------------------------- Multicast list ------------------------------*/
+
+/*
+ * Returns 0 if dmi1 and dmi2 are the same, non-0 otherwise
+ */
+static inline int bond_is_dmi_same(struct dev_mc_list *dmi1, struct dev_mc_list *dmi2)
+{
+ return memcmp(dmi1->dmi_addr, dmi2->dmi_addr, dmi1->dmi_addrlen) == 0 &&
+ dmi1->dmi_addrlen == dmi2->dmi_addrlen;
+}
+
+/*
+ * returns dmi entry if found, NULL otherwise
+ */
+static struct dev_mc_list *bond_mc_list_find_dmi(struct dev_mc_list *dmi, struct dev_mc_list *mc_list)
+{
+ struct dev_mc_list *idmi;
+
+ for (idmi = mc_list; idmi; idmi = idmi->next) {
+ if (bond_is_dmi_same(dmi, idmi)) {
+ return idmi;
+ }
+ }
+
+ return NULL;
+}
+
+/*
+ * Push the promiscuity flag down to appropriate slaves
+ */
+static void bond_set_promiscuity(struct bonding *bond, int inc)
+{
+ if (USES_PRIMARY(bond->params.mode)) {
+ /* write lock already acquired */
+ if (bond->curr_active_slave) {
+ dev_set_promiscuity(bond->curr_active_slave->dev, inc);
+ }
+ } else {
+ struct slave *slave;
+ int i;
+ bond_for_each_slave(bond, slave, i) {
+ dev_set_promiscuity(slave->dev, inc);
+ }
+ }
+}
+
+/*
+ * Push the allmulti flag down to all slaves
+ */
+static void bond_set_allmulti(struct bonding *bond, int inc)
+{
+ if (USES_PRIMARY(bond->params.mode)) {
+ /* write lock already acquired */
+ if (bond->curr_active_slave) {
+ dev_set_allmulti(bond->curr_active_slave->dev, inc);
+ }
+ } else {
+ struct slave *slave;
+ int i;
+ bond_for_each_slave(bond, slave, i) {
+ dev_set_allmulti(slave->dev, inc);
+ }
+ }
+}
+
+/*
+ * Add a Multicast address to slaves
+ * according to mode
+ */
+static void bond_mc_add(struct bonding *bond, void *addr, int alen)
+{
+ if (USES_PRIMARY(bond->params.mode)) {
+ /* write lock already acquired */
+ if (bond->curr_active_slave) {
+ dev_mc_add(bond->curr_active_slave->dev, addr, alen, 0);
+ }
+ } else {
+ struct slave *slave;
+ int i;
+ bond_for_each_slave(bond, slave, i) {
+ dev_mc_add(slave->dev, addr, alen, 0);
+ }
+ }
+}
+
+/*
+ * Remove a multicast address from slave
+ * according to mode
+ */
+static void bond_mc_delete(struct bonding *bond, void *addr, int alen)
+{
+ if (USES_PRIMARY(bond->params.mode)) {
+ /* write lock already acquired */
+ if (bond->curr_active_slave) {
+ dev_mc_delete(bond->curr_active_slave->dev, addr, alen, 0);
+ }
+ } else {
+ struct slave *slave;
+ int i;
+ bond_for_each_slave(bond, slave, i) {
+ dev_mc_delete(slave->dev, addr, alen, 0);
+ }
+ }
+}
+
+/*
+ * Totally destroys the mc_list in bond
+ */
+static void bond_mc_list_destroy(struct bonding *bond)
+{
+ struct dev_mc_list *dmi;
+
+ dmi = bond->mc_list;
+ while (dmi) {
+ bond->mc_list = dmi->next;
+ kfree(dmi);
+ dmi = bond->mc_list;
+ }
+}
+
+/*
+ * Copy all the Multicast addresses from src to the bonding device dst
+ */
+static int bond_mc_list_copy(struct dev_mc_list *mc_list, struct bonding *bond, int gpf_flag)
+{
+ struct dev_mc_list *dmi, *new_dmi;
+
+ for (dmi = mc_list; dmi; dmi = dmi->next) {
+ new_dmi = kmalloc(sizeof(struct dev_mc_list), gpf_flag);
+
+ if (!new_dmi) {
+ /* FIXME: Potential memory leak !!! */
+ return -ENOMEM;
+ }
+
+ new_dmi->next = bond->mc_list;
+ bond->mc_list = new_dmi;
+ new_dmi->dmi_addrlen = dmi->dmi_addrlen;
+ memcpy(new_dmi->dmi_addr, dmi->dmi_addr, dmi->dmi_addrlen);
+ new_dmi->dmi_users = dmi->dmi_users;
+ new_dmi->dmi_gusers = dmi->dmi_gusers;
+ }
+
+ return 0;
+}
+
+/*
+ * flush all members of flush->mc_list from device dev->mc_list
+ */
+static void bond_mc_list_flush(struct net_device *bond_dev, struct net_device *slave_dev)
+{
+ struct bonding *bond = bond_dev->priv;
+ struct dev_mc_list *dmi;
+
+ for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) {
+ dev_mc_delete(slave_dev, dmi->dmi_addr, dmi->dmi_addrlen, 0);
+ }
+
+ if (bond->params.mode == BOND_MODE_8023AD) {
+ /* del lacpdu mc addr from mc list */
+ u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
+
+ dev_mc_delete(slave_dev, lacpdu_multicast, ETH_ALEN, 0);
+ }
+}
+
+/*--------------------------- Active slave change ---------------------------*/
+
+/*
+ * Update the mc list and multicast-related flags for the new and
+ * old active slaves (if any) according to the multicast mode, and
+ * promiscuous flags unconditionally.
+ */
+static void bond_mc_swap(struct bonding *bond, struct slave *new_active, struct slave *old_active)
+{
+ struct dev_mc_list *dmi;
+
+ if (!USES_PRIMARY(bond->params.mode)) {
+ /* nothing to do - mc list is already up-to-date on
+ * all slaves
+ */
+ return;
+ }
+
+ if (old_active) {
+ if (bond->dev->flags & IFF_PROMISC) {
+ dev_set_promiscuity(old_active->dev, -1);
+ }
+
+ if (bond->dev->flags & IFF_ALLMULTI) {
+ dev_set_allmulti(old_active->dev, -1);
+ }
+
+ for (dmi = bond->dev->mc_list; dmi; dmi = dmi->next) {
+ dev_mc_delete(old_active->dev, dmi->dmi_addr, dmi->dmi_addrlen, 0);
+ }
+ }
+
+ if (new_active) {
+ if (bond->dev->flags & IFF_PROMISC) {
+ dev_set_promiscuity(new_active->dev, 1);
+ }
+
+ if (bond->dev->flags & IFF_ALLMULTI) {
+ dev_set_allmulti(new_active->dev, 1);
+ }
+
+ for (dmi = bond->dev->mc_list; dmi; dmi = dmi->next) {
+ dev_mc_add(new_active->dev, dmi->dmi_addr, dmi->dmi_addrlen, 0);
+ }
+ }
+}
+
+/**
+ * find_best_interface - select the best available slave to be the active one
+ * @bond: our bonding struct
+ *
+ * Warning: Caller must hold curr_slave_lock for writing.
+ */
+static struct slave *bond_find_best_slave(struct bonding *bond)
+{
+ struct slave *new_active, *old_active;
+ struct slave *bestslave = NULL;
+ int mintime = bond->params.updelay;
+ int i;
+
+ new_active = old_active = bond->curr_active_slave;
+
+ if (!new_active) { /* there were no active slaves left */
+ if (bond->slave_cnt > 0) { /* found one slave */
+ new_active = bond->first_slave;
+ } else {
+ return NULL; /* still no slave, return NULL */
+ }
+ }
+
+ /* first try the primary link; if arping, a link must tx/rx traffic
+ * before it can be considered the curr_active_slave - also, we would skip
+ * slaves between the curr_active_slave and primary_slave that may be up
+ * and able to arp
+ */
+ if ((bond->primary_slave) &&
+ (!bond->params.arp_interval) &&
+ (IS_UP(bond->primary_slave->dev))) {
+ new_active = bond->primary_slave;
+ }
+
+ /* remember where to stop iterating over the slaves */
+ old_active = new_active;
+
+ bond_for_each_slave_from(bond, new_active, i, old_active) {
+ if (IS_UP(new_active->dev)) {
+ if (new_active->link == BOND_LINK_UP) {
+ return new_active;
+ } else if (new_active->link == BOND_LINK_BACK) {
+ /* link up, but waiting for stabilization */
+ if (new_active->delay < mintime) {
+ mintime = new_active->delay;
+ bestslave = new_active;
+ }
+ }
+ }
+ }
+
+ return bestslave;
+}
+
+/**
+ * change_active_interface - change the active slave into the specified one
+ * @bond: our bonding struct
+ * @new: the new slave to make the active one
+ *
+ * Set the new slave to the bond's settings and unset them on the old
+ * curr_active_slave.
+ * Setting include flags, mc-list, promiscuity, allmulti, etc.
+ *
+ * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP,
+ * because it is apparently the best available slave we have, even though its
+ * updelay hasn't timed out yet.
+ *
+ * Warning: Caller must hold curr_slave_lock for writing.
+ */
+static void bond_change_active_slave(struct bonding *bond, struct slave *new_active)
+{
+ struct slave *old_active = bond->curr_active_slave;
+
+ if (old_active == new_active) {
+ return;
+ }
+
+ if (new_active) {
+ if (new_active->link == BOND_LINK_BACK) {
+ if (USES_PRIMARY(bond->params.mode)) {
+ printk(KERN_INFO DRV_NAME
+ ": %s: making interface %s the new "
+ "active one %d ms earlier.\n",
+ bond->dev->name, new_active->dev->name,
+ (bond->params.updelay - new_active->delay) * bond->params.miimon);
+ }
+
+ new_active->delay = 0;
+ new_active->link = BOND_LINK_UP;
+ new_active->jiffies = jiffies;
+
+ if (bond->params.mode == BOND_MODE_8023AD) {
+ bond_3ad_handle_link_change(new_active, BOND_LINK_UP);
+ }
+
+ if ((bond->params.mode == BOND_MODE_TLB) ||
+ (bond->params.mode == BOND_MODE_ALB)) {
+ bond_alb_handle_link_change(bond, new_active, BOND_LINK_UP);
+ }
+ } else {
+ if (USES_PRIMARY(bond->params.mode)) {
+ printk(KERN_INFO DRV_NAME
+ ": %s: making interface %s the new "
+ "active one.\n",
+ bond->dev->name, new_active->dev->name);
+ }
+ }
+ }
+
+ if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) {
+ if (old_active) {
+ bond_set_slave_inactive_flags(old_active);
+ }
+
+ if (new_active) {
+ bond_set_slave_active_flags(new_active);
+ }
+ }
+
+ if (USES_PRIMARY(bond->params.mode)) {
+ bond_mc_swap(bond, new_active, old_active);
+ }
+
+ if ((bond->params.mode == BOND_MODE_TLB) ||
+ (bond->params.mode == BOND_MODE_ALB)) {
+ bond_alb_handle_active_change(bond, new_active);
+ } else {
+ bond->curr_active_slave = new_active;
+ }
+}
+
+/**
+ * bond_select_active_slave - select a new active slave, if needed
+ * @bond: our bonding struct
+ *
+ * This functions shoud be called when one of the following occurs:
+ * - The old curr_active_slave has been released or lost its link.
+ * - The primary_slave has got its link back.
+ * - A slave has got its link back and there's no old curr_active_slave.
+ *
+ * Warning: Caller must hold curr_slave_lock for writing.
+ */
+static void bond_select_active_slave(struct bonding *bond)
+{
+ struct slave *best_slave;
+
+ best_slave = bond_find_best_slave(bond);
+ if (best_slave != bond->curr_active_slave) {
+ bond_change_active_slave(bond, best_slave);
+ }
+}
+
+/*--------------------------- slave list handling ---------------------------*/
+
+/*
+ * This function attaches the slave to the end of list.
+ *
+ * bond->lock held for writing by caller.
+ */
+static void bond_attach_slave(struct bonding *bond, struct slave *new_slave)
+{
+ if (bond->first_slave == NULL) { /* attaching the first slave */
+ new_slave->next = new_slave;
+ new_slave->prev = new_slave;
+ bond->first_slave = new_slave;
+ } else {
+ new_slave->next = bond->first_slave;
+ new_slave->prev = bond->first_slave->prev;
+ new_slave->next->prev = new_slave;
+ new_slave->prev->next = new_slave;
+ }
+
+ bond->slave_cnt++;
+}
+
+/*
+ * This function detaches the slave from the list.
+ * WARNING: no check is made to verify if the slave effectively
+ * belongs to <bond>.
+ * Nothing is freed on return, structures are just unchained.
+ * If any slave pointer in bond was pointing to <slave>,
+ * it should be changed by the calling function.
+ *
+ * bond->lock held for writing by caller.
+ */
+static void bond_detach_slave(struct bonding *bond, struct slave *slave)
+{
+ if (slave->next) {
+ slave->next->prev = slave->prev;
+ }
+
+ if (slave->prev) {
+ slave->prev->next = slave->next;
+ }
+
+ if (bond->first_slave == slave) { /* slave is the first slave */
+ if (bond->slave_cnt > 1) { /* there are more slave */
+ bond->first_slave = slave->next;
+ } else {
+ bond->first_slave = NULL; /* slave was the last one */
+ }
+ }
+
+ slave->next = NULL;
+ slave->prev = NULL;
+ bond->slave_cnt--;
+}
+
+/*---------------------------------- IOCTL ----------------------------------*/
+
+static int bond_sethwaddr(struct net_device *bond_dev, struct net_device *slave_dev)
+{
+ dprintk("bond_dev=%p\n", bond_dev);
+ dprintk("slave_dev=%p\n", slave_dev);
+ dprintk("slave_dev->addr_len=%d\n", slave_dev->addr_len);
+ memcpy(bond_dev->dev_addr, slave_dev->dev_addr, slave_dev->addr_len);
+ return 0;
+}
+
+/* enslave device <slave> to bond device <master> */
+static int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
+{
+ struct bonding *bond = bond_dev->priv;
+ struct slave *new_slave = NULL;
+ struct dev_mc_list *dmi;
+ struct sockaddr addr;
+ int link_reporting;
+ int old_features = bond_dev->features;
+ int res = 0;
+
+ if (slave_dev->do_ioctl == NULL) {
+ printk(KERN_WARNING DRV_NAME
+ ": Warning : no link monitoring support for %s\n",
+ slave_dev->name);
+ }
+
+ /* bond must be initialized by bond_open() before enslaving */
+ if (!(bond_dev->flags & IFF_UP)) {
+ dprintk("Error, master_dev is not up\n");
+ return -EPERM;
+ }
+
+ /* already enslaved */
+ if (slave_dev->flags & IFF_SLAVE) {
+ dprintk("Error, Device was already enslaved\n");
+ return -EBUSY;
+ }
+
+ /* vlan challenged mutual exclusion */
+ /* no need to lock since we're protected by rtnl_lock */
+ if (slave_dev->features & NETIF_F_VLAN_CHALLENGED) {
+ dprintk("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev->name);
+ if (!list_empty(&bond->vlan_list)) {
+ printk(KERN_ERR DRV_NAME
+ ": Error: cannot enslave VLAN "
+ "challenged slave %s on VLAN enabled "
+ "bond %s\n", slave_dev->name,
+ bond_dev->name);
+ return -EPERM;
+ } else {
+ printk(KERN_WARNING DRV_NAME
+ ": Warning: enslaved VLAN challenged "
+ "slave %s. Adding VLANs will be blocked as "
+ "long as %s is part of bond %s\n",
+ slave_dev->name, slave_dev->name,
+ bond_dev->name);
+ bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
+ }
+ } else {
+ dprintk("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev->name);
+ if (bond->slave_cnt == 0) {
+ /* First slave, and it is not VLAN challenged,
+ * so remove the block of adding VLANs over the bond.
+ */
+ bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED;
+ }
+ }
+
+ if (app_abi_ver >= 1) {
+ /* The application is using an ABI, which requires the
+ * slave interface to be closed.
+ */
+ if ((slave_dev->flags & IFF_UP)) {
+ printk(KERN_ERR DRV_NAME
+ ": Error: %s is up\n",
+ slave_dev->name);
+ res = -EPERM;
+ goto err_undo_flags;
+ }
+
+ if (slave_dev->set_mac_address == NULL) {
+ printk(KERN_ERR DRV_NAME
+ ": Error: The slave device you specified does "
+ "not support setting the MAC address.\n");
+ printk(KERN_ERR
+ "Your kernel likely does not support slave "
+ "devices.\n");
+
+ res = -EOPNOTSUPP;
+ goto err_undo_flags;
+ }
+ } else {
+ /* The application is not using an ABI, which requires the
+ * slave interface to be open.
+ */
+ if (!(slave_dev->flags & IFF_UP)) {
+ printk(KERN_ERR DRV_NAME
+ ": Error: %s is not running\n",
+ slave_dev->name);
+ res = -EINVAL;
+ goto err_undo_flags;
+ }
+
+ if ((bond->params.mode == BOND_MODE_8023AD) ||
+ (bond->params.mode == BOND_MODE_TLB) ||
+ (bond->params.mode == BOND_MODE_ALB)) {
+ printk(KERN_ERR DRV_NAME
+ ": Error: to use %s mode, you must upgrade "
+ "ifenslave.\n",
+ bond_mode_name(bond->params.mode));
+ res = -EOPNOTSUPP;
+ goto err_undo_flags;
+ }
+ }
+
+ new_slave = kmalloc(sizeof(struct slave), GFP_KERNEL);
+ if (!new_slave) {
+ res = -ENOMEM;
+ goto err_undo_flags;
+ }
+
+ memset(new_slave, 0, sizeof(struct slave));
+
+ /* save slave's original flags before calling
+ * netdev_set_master and dev_open
+ */
+ new_slave->original_flags = slave_dev->flags;
+
+ if (app_abi_ver >= 1) {
+ /* save slave's original ("permanent") mac address for
+ * modes that needs it, and for restoring it upon release,
+ * and then set it to the master's address
+ */
+ memcpy(new_slave->perm_hwaddr, slave_dev->dev_addr, ETH_ALEN);
+
+ /* set slave to master's mac address
+ * The application already set the master's
+ * mac address to that of the first slave
+ */
+ memcpy(addr.sa_data, bond_dev->dev_addr, bond_dev->addr_len);
+ addr.sa_family = slave_dev->type;
+ res = dev_set_mac_address(slave_dev, &addr);
+ if (res) {
+ dprintk("Error %d calling set_mac_address\n", res);
+ goto err_free;
+ }
+
+ /* open the slave since the application closed it */
+ res = dev_open(slave_dev);
+ if (res) {
+ dprintk("Openning slave %s failed\n", slave_dev->name);
+ goto err_restore_mac;
+ }
+ }
+
+ res = netdev_set_master(slave_dev, bond_dev);
+ if (res) {
+ dprintk("Error %d calling netdev_set_master\n", res);
+ if (app_abi_ver < 1) {
+ goto err_free;
+ } else {
+ goto err_close;
+ }
+ }
+
+ new_slave->dev = slave_dev;
+
+ if ((bond->params.mode == BOND_MODE_TLB) ||
+ (bond->params.mode == BOND_MODE_ALB)) {
+ /* bond_alb_init_slave() must be called before all other stages since
+ * it might fail and we do not want to have to undo everything
+ */
+ res = bond_alb_init_slave(bond, new_slave);
+ if (res) {
+ goto err_unset_master;
+ }
+ }
+
+ /* If the mode USES_PRIMARY, then the new slave gets the
+ * master's promisc (and mc) settings only if it becomes the
+ * curr_active_slave, and that is taken care of later when calling
+ * bond_change_active()
+ */
+ if (!USES_PRIMARY(bond->params.mode)) {
+ /* set promiscuity level to new slave */
+ if (bond_dev->flags & IFF_PROMISC) {
+ dev_set_promiscuity(slave_dev, 1);
+ }
+
+ /* set allmulti level to new slave */
+ if (bond_dev->flags & IFF_ALLMULTI) {
+ dev_set_allmulti(slave_dev, 1);
+ }
+
+ /* upload master's mc_list to new slave */
+ for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) {
+ dev_mc_add (slave_dev, dmi->dmi_addr, dmi->dmi_addrlen, 0);
+ }
+ }
+
+ if (bond->params.mode == BOND_MODE_8023AD) {
+ /* add lacpdu mc addr to mc list */
+ u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
+
+ dev_mc_add(slave_dev, lacpdu_multicast, ETH_ALEN, 0);
+ }
+
+ bond_add_vlans_on_slave(bond, slave_dev);
+
+ write_lock_bh(&bond->lock);
+
+ bond_attach_slave(bond, new_slave);
+
+ new_slave->delay = 0;
+ new_slave->link_failure_count = 0;
+
+ if (bond->params.miimon && !bond->params.use_carrier) {
+ link_reporting = bond_check_dev_link(bond, slave_dev, 1);
+
+ if ((link_reporting == -1) && !bond->params.arp_interval) {
+ /*
+ * miimon is set but a bonded network driver
+ * does not support ETHTOOL/MII and
+ * arp_interval is not set. Note: if
+ * use_carrier is enabled, we will never go
+ * here (because netif_carrier is always
+ * supported); thus, we don't need to change
+ * the messages for netif_carrier.
+ */
+ printk(KERN_WARNING DRV_NAME
+ ": Warning: MII and ETHTOOL support not "
+ "available for interface %s, and "
+ "arp_interval/arp_ip_target module parameters "
+ "not specified, thus bonding will not detect "
+ "link failures! see bonding.txt for details.\n",
+ slave_dev->name);
+ } else if (link_reporting == -1) {
+ /* unable get link status using mii/ethtool */
+ printk(KERN_WARNING DRV_NAME
+ ": Warning: can't get link status from "
+ "interface %s; the network driver associated "
+ "with this interface does not support MII or "
+ "ETHTOOL link status reporting, thus miimon "
+ "has no effect on this interface.\n",
+ slave_dev->name);
+ }
+ }
+
+ /* check for initial state */
+ if (!bond->params.miimon ||
+ (bond_check_dev_link(bond, slave_dev, 0) == BMSR_LSTATUS)) {
+ if (bond->params.updelay) {
+ dprintk("Initial state of slave_dev is "
+ "BOND_LINK_BACK\n");
+ new_slave->link = BOND_LINK_BACK;
+ new_slave->delay = bond->params.updelay;
+ } else {
+ dprintk("Initial state of slave_dev is "
+ "BOND_LINK_UP\n");
+ new_slave->link = BOND_LINK_UP;
+ }
+ new_slave->jiffies = jiffies;
+ } else {
+ dprintk("Initial state of slave_dev is "
+ "BOND_LINK_DOWN\n");
+ new_slave->link = BOND_LINK_DOWN;
+ }
+
+ if (bond_update_speed_duplex(new_slave) &&
+ (new_slave->link != BOND_LINK_DOWN)) {
+ printk(KERN_WARNING DRV_NAME
+ ": Warning: failed to get speed and duplex from %s, "
+ "assumed to be 100Mb/sec and Full.\n",
+ new_slave->dev->name);
+
+ if (bond->params.mode == BOND_MODE_8023AD) {
+ printk(KERN_WARNING
+ "Operation of 802.3ad mode requires ETHTOOL "
+ "support in base driver for proper aggregator "
+ "selection.\n");
+ }
+ }
+
+ if (USES_PRIMARY(bond->params.mode) && bond->params.primary[0]) {
+ /* if there is a primary slave, remember it */
+ if (strcmp(bond->params.primary, new_slave->dev->name) == 0) {
+ bond->primary_slave = new_slave;
+ }
+ }
+
+ switch (bond->params.mode) {
+ case BOND_MODE_ACTIVEBACKUP:
+ /* 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 curr_active_slave always point to the last
+ * usable interface, we just have to verify this interface's flag.
+ */
+ if (((!bond->curr_active_slave) ||
+ (bond->curr_active_slave->dev->flags & IFF_NOARP)) &&
+ (new_slave->link != BOND_LINK_DOWN)) {
+ dprintk("This is the first active slave\n");
+ /* first slave or no active slave yet, and this link
+ is OK, so make this interface the active one */
+ bond_change_active_slave(bond, new_slave);
+ } else {
+ dprintk("This is just a backup slave\n");
+ bond_set_slave_inactive_flags(new_slave);
+ }
+ break;
+ case BOND_MODE_8023AD:
+ /* in 802.3ad mode, the internal mechanism
+ * will activate the slaves in the selected
+ * aggregator
+ */
+ bond_set_slave_inactive_flags(new_slave);
+ /* if this is the first slave */
+ if (bond->slave_cnt == 1) {
+ SLAVE_AD_INFO(new_slave).id = 1;
+ /* Initialize AD with the number of times that the AD timer is called in 1 second
+ * can be called only after the mac address of the bond is set
+ */
+ bond_3ad_initialize(bond, 1000/AD_TIMER_INTERVAL,
+ bond->params.lacp_fast);
+ } else {
+ SLAVE_AD_INFO(new_slave).id =
+ SLAVE_AD_INFO(new_slave->prev).id + 1;
+ }
+
+ bond_3ad_bind_slave(new_slave);
+ break;
+ case BOND_MODE_TLB:
+ case BOND_MODE_ALB:
+ new_slave->state = BOND_STATE_ACTIVE;
+ if ((!bond->curr_active_slave) &&
+ (new_slave->link != BOND_LINK_DOWN)) {
+ /* first slave or no active slave yet, and this link
+ * is OK, so make this interface the active one
+ */
+ bond_change_active_slave(bond, new_slave);
+ }
+ break;
+ default:
+ dprintk("This slave is always active in trunk mode\n");
+
+ /* always active in trunk mode */
+ new_slave->state = BOND_STATE_ACTIVE;
+
+ /* In trunking mode there is little meaning to curr_active_slave
+ * anyway (it holds no special properties of the bond device),
+ * so we can change it without calling change_active_interface()
+ */
+ if (!bond->curr_active_slave) {
+ bond->curr_active_slave = new_slave;
+ }
+ break;
+ } /* switch(bond_mode) */
+
+ write_unlock_bh(&bond->lock);
+
+ if (app_abi_ver < 1) {
+ /*
+ * !!! 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.
+ */
+ int ndx = 0;
+
+ for (ndx = 0; ndx < bond_dev->addr_len; ndx++) {
+ dprintk("Checking ndx=%d of bond_dev->dev_addr\n",
+ ndx);
+ if (bond_dev->dev_addr[ndx] != 0) {
+ dprintk("Found non-zero byte at ndx=%d\n",
+ ndx);
+ break;
+ }
+ }
+
+ if (ndx == bond_dev->addr_len) {
+ /*
+ * We got all the way through the address and it was
+ * all 0's.
+ */
+ dprintk("%s doesn't have a MAC address yet. \n",
+ bond_dev->name);
+ dprintk("Going to give assign it from %s.\n",
+ slave_dev->name);
+ bond_sethwaddr(bond_dev, slave_dev);
+ }
+ }
+
+ printk(KERN_INFO DRV_NAME
+ ": %s: enslaving %s as a%s interface with a%s link.\n",
+ bond_dev->name, slave_dev->name,
+ new_slave->state == BOND_STATE_ACTIVE ? "n active" : " backup",
+ new_slave->link != BOND_LINK_DOWN ? "n up" : " down");
+
+ /* enslave is successful */
+ return 0;
+
+/* Undo stages on error */
+err_unset_master:
+ netdev_set_master(slave_dev, NULL);
+
+err_close:
+ dev_close(slave_dev);
+
+err_restore_mac:
+ memcpy(addr.sa_data, new_slave->perm_hwaddr, ETH_ALEN);
+ addr.sa_family = slave_dev->type;
+ dev_set_mac_address(slave_dev, &addr);
+
+err_free:
+ kfree(new_slave);
+
+err_undo_flags:
+ bond_dev->features = old_features;
+
+ return res;
+}
+
+/*
+ * Try to release the slave device <slave> from the bond device <master>
+ * It is legal to access curr_active_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 *bond_dev, struct net_device *slave_dev)
+{
+ struct bonding *bond = bond_dev->priv;
+ struct slave *slave, *oldcurrent;
+ struct sockaddr addr;
+ int mac_addr_differ;
+
+ /* slave is not a slave or master is not master of this slave */
+ if (!(slave_dev->flags & IFF_SLAVE) ||
+ (slave_dev->master != bond_dev)) {
+ printk(KERN_ERR DRV_NAME
+ ": Error: %s: cannot release %s.\n",
+ bond_dev->name, slave_dev->name);
+ return -EINVAL;
+ }
+
+ write_lock_bh(&bond->lock);
+
+ slave = bond_get_slave_by_dev(bond, slave_dev);
+ if (!slave) {
+ /* not a slave of this bond */
+ printk(KERN_INFO DRV_NAME
+ ": %s: %s not enslaved\n",
+ bond_dev->name, slave_dev->name);
+ return -EINVAL;
+ }
+
+ mac_addr_differ = memcmp(bond_dev->dev_addr,
+ slave->perm_hwaddr,
+ ETH_ALEN);
+ if (!mac_addr_differ && (bond->slave_cnt > 1)) {
+ printk(KERN_WARNING DRV_NAME
+ ": Warning: the permanent HWaddr of %s "
+ "- %02X:%02X:%02X:%02X:%02X:%02X - is "
+ "still in use by %s. Set the HWaddr of "
+ "%s to a different address to avoid "
+ "conflicts.\n",
+ slave_dev->name,
+ slave->perm_hwaddr[0],
+ slave->perm_hwaddr[1],
+ slave->perm_hwaddr[2],
+ slave->perm_hwaddr[3],
+ slave->perm_hwaddr[4],
+ slave->perm_hwaddr[5],
+ bond_dev->name,
+ slave_dev->name);
+ }
+
+ /* Inform AD package of unbinding of slave. */
+ if (bond->params.mode == BOND_MODE_8023AD) {
+ /* must be called before the slave is
+ * detached from the list
+ */
+ bond_3ad_unbind_slave(slave);
+ }
+
+ printk(KERN_INFO DRV_NAME
+ ": %s: releasing %s interface %s\n",
+ bond_dev->name,
+ (slave->state == BOND_STATE_ACTIVE)
+ ? "active" : "backup",
+ slave_dev->name);
+
+ oldcurrent = bond->curr_active_slave;
+
+ bond->current_arp_slave = NULL;
+
+ /* release the slave from its bond */
+ bond_detach_slave(bond, slave);
+
+ if (bond->primary_slave == slave) {
+ bond->primary_slave = NULL;
+ }
+
+ if (oldcurrent == slave) {
+ bond_change_active_slave(bond, NULL);
+ }
+
+ if ((bond->params.mode == BOND_MODE_TLB) ||
+ (bond->params.mode == BOND_MODE_ALB)) {
+ /* Must be called only after the slave has been
+ * detached from the list and the curr_active_slave
+ * has been cleared (if our_slave == old_current),
+ * but before a new active slave is selected.
+ */
+ bond_alb_deinit_slave(bond, slave);
+ }
+
+ if (oldcurrent == slave) {
+ bond_select_active_slave(bond);
+
+ if (!bond->curr_active_slave) {
+ printk(KERN_INFO DRV_NAME
+ ": %s: now running without any active "
+ "interface !\n",
+ bond_dev->name);
+ }
+ }
+
+ if (bond->slave_cnt == 0) {
+ /* if the last slave was removed, zero the mac address
+ * of the master so it will be set by the application
+ * to the mac address of the first slave
+ */
+ memset(bond_dev->dev_addr, 0, bond_dev->addr_len);
+
+ if (list_empty(&bond->vlan_list)) {
+ bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
+ } else {
+ printk(KERN_WARNING DRV_NAME
+ ": Warning: clearing HW address of %s while it "
+ "still has VLANs.\n",
+ bond_dev->name);
+ printk(KERN_WARNING DRV_NAME
+ ": When re-adding slaves, make sure the bond's "
+ "HW address matches its VLANs'.\n");
+ }
+ } else if ((bond_dev->features & NETIF_F_VLAN_CHALLENGED) &&
+ !bond_has_challenged_slaves(bond)) {
+ printk(KERN_INFO DRV_NAME
+ ": last VLAN challenged slave %s "
+ "left bond %s. VLAN blocking is removed\n",
+ slave_dev->name, bond_dev->name);
+ bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED;
+ }
+
+ write_unlock_bh(&bond->lock);
+
+ bond_del_vlans_from_slave(bond, slave_dev);
+
+ /* If the mode USES_PRIMARY, then we should only remove its
+ * promisc and mc settings if it was the curr_active_slave, but that was
+ * already taken care of above when we detached the slave
+ */
+ if (!USES_PRIMARY(bond->params.mode)) {
+ /* unset promiscuity level from slave */
+ if (bond_dev->flags & IFF_PROMISC) {
+ dev_set_promiscuity(slave_dev, -1);
+ }
+
+ /* unset allmulti level from slave */
+ if (bond_dev->flags & IFF_ALLMULTI) {
+ dev_set_allmulti(slave_dev, -1);
+ }
+
+ /* flush master's mc_list from slave */
+ bond_mc_list_flush(bond_dev, slave_dev);
+ }
+
+ netdev_set_master(slave_dev, NULL);
+
+ /* close slave before restoring its mac address */
+ dev_close(slave_dev);
+
+ if (app_abi_ver >= 1) {
+ /* restore original ("permanent") mac address */
+ memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN);
+ addr.sa_family = slave_dev->type;
+ dev_set_mac_address(slave_dev, &addr);
+ }
+
+ /* restore the original state of the
+ * IFF_NOARP flag that might have been
+ * set by bond_set_slave_inactive_flags()
+ */
+ if ((slave->original_flags & IFF_NOARP) == 0) {
+ slave_dev->flags &= ~IFF_NOARP;
+ }
+
+ kfree(slave);
+
+ return 0; /* deletion OK */
+}
+
+/*
+ * This function releases all slaves.
+ */
+static int bond_release_all(struct net_device *bond_dev)
+{
+ struct bonding *bond = bond_dev->priv;
+ struct slave *slave;
+ struct net_device *slave_dev;
+ struct sockaddr addr;
+
+ write_lock_bh(&bond->lock);
+
+ if (bond->slave_cnt == 0) {
+ goto out;
+ }
+
+ bond->current_arp_slave = NULL;
+ bond->primary_slave = NULL;
+ bond_change_active_slave(bond, NULL);
+
+ while ((slave = bond->first_slave) != NULL) {
+ /* Inform AD package of unbinding of slave
+ * before slave is detached from the list.
+ */
+ if (bond->params.mode == BOND_MODE_8023AD) {
+ bond_3ad_unbind_slave(slave);
+ }
+
+ slave_dev = slave->dev;
+ bond_detach_slave(bond, slave);
+
+ if ((bond->params.mode == BOND_MODE_TLB) ||
+ (bond->params.mode == BOND_MODE_ALB)) {
+ /* must be called only after the slave
+ * has been detached from the list
+ */
+ bond_alb_deinit_slave(bond, slave);
+ }
+
+ /* now that the slave is detached, unlock and perform
+ * all the undo steps that should not be called from
+ * within a lock.
+ */
+ write_unlock_bh(&bond->lock);
+
+ bond_del_vlans_from_slave(bond, slave_dev);
+
+ /* If the mode USES_PRIMARY, then we should only remove its
+ * promisc and mc settings if it was the curr_active_slave, but that was
+ * already taken care of above when we detached the slave
+ */
+ if (!USES_PRIMARY(bond->params.mode)) {
+ /* unset promiscuity level from slave */
+ if (bond_dev->flags & IFF_PROMISC) {
+ dev_set_promiscuity(slave_dev, -1);
+ }
+
+ /* unset allmulti level from slave */
+ if (bond_dev->flags & IFF_ALLMULTI) {
+ dev_set_allmulti(slave_dev, -1);
+ }
+
+ /* flush master's mc_list from slave */
+ bond_mc_list_flush(bond_dev, slave_dev);
+ }
+
+ netdev_set_master(slave_dev, NULL);
+
+ /* close slave before restoring its mac address */
+ dev_close(slave_dev);
+
+ if (app_abi_ver >= 1) {
+ /* restore original ("permanent") mac address*/
+ memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN);
+ addr.sa_family = slave_dev->type;
+ dev_set_mac_address(slave_dev, &addr);
+ }
+
+ /* restore the original state of the IFF_NOARP flag that might have
+ * been set by bond_set_slave_inactive_flags()
+ */
+ if ((slave->original_flags & IFF_NOARP) == 0) {
+ slave_dev->flags &= ~IFF_NOARP;
+ }
+
+ kfree(slave);
+
+ /* re-acquire the lock before getting the next slave */
+ write_lock_bh(&bond->lock);
+ }
+
+ /* zero the mac address of the master so it will be
+ * set by the application to the mac address of the
+ * first slave
+ */
+ memset(bond_dev->dev_addr, 0, bond_dev->addr_len);
+
+ if (list_empty(&bond->vlan_list)) {
+ bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
+ } else {
+ printk(KERN_WARNING DRV_NAME
+ ": Warning: clearing HW address of %s while it "
+ "still has VLANs.\n",
+ bond_dev->name);
+ printk(KERN_WARNING DRV_NAME
+ ": When re-adding slaves, make sure the bond's "
+ "HW address matches its VLANs'.\n");
+ }
+
+ printk(KERN_INFO DRV_NAME
+ ": %s: released all slaves\n",
+ bond_dev->name);
+
+out:
+ write_unlock_bh(&bond->lock);
+
+ return 0;
+}
+
+/*
+ * 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_ioctl_change_active(struct net_device *bond_dev, struct net_device *slave_dev)
+{
+ struct bonding *bond = bond_dev->priv;
+ struct slave *old_active = NULL;
+ struct slave *new_active = NULL;
+ int res = 0;
+
+ if (!USES_PRIMARY(bond->params.mode)) {
+ return -EINVAL;
+ }
+
+ /* Verify that master_dev is indeed the master of slave_dev */
+ if (!(slave_dev->flags & IFF_SLAVE) ||
+ (slave_dev->master != bond_dev)) {
+ return -EINVAL;
+ }
+
+ write_lock_bh(&bond->lock);
+
+ old_active = bond->curr_active_slave;
+ new_active = bond_get_slave_by_dev(bond, slave_dev);
+
+ /*
+ * Changing to the current active: do nothing; return success.
+ */
+ if (new_active && (new_active == old_active)) {
+ write_unlock_bh(&bond->lock);
+ return 0;
+ }
+
+ if ((new_active) &&
+ (old_active) &&
+ (new_active->link == BOND_LINK_UP) &&
+ IS_UP(new_active->dev)) {
+ bond_change_active_slave(bond, new_active);
+ } else {
+ res = -EINVAL;
+ }
+
+ write_unlock_bh(&bond->lock);
+
+ return res;
+}
+
+static int bond_ethtool_ioctl(struct net_device *bond_dev, struct ifreq *ifr)
+{
+ struct ethtool_drvinfo info;
+ void __user *addr = ifr->ifr_data;
+ uint32_t cmd;
+
+ if (get_user(cmd, (uint32_t __user *)addr)) {
+ return -EFAULT;
+ }
+
+ switch (cmd) {
+ case ETHTOOL_GDRVINFO:
+ if (copy_from_user(&info, addr, sizeof(info))) {
+ return -EFAULT;
+ }
+
+ if (strcmp(info.driver, "ifenslave") == 0) {
+ int new_abi_ver;
+ char *endptr;
+
+ new_abi_ver = simple_strtoul(info.fw_version,
+ &endptr, 0);
+ if (*endptr) {
+ printk(KERN_ERR DRV_NAME
+ ": Error: got invalid ABI "
+ "version from application\n");
+
+ return -EINVAL;
+ }
+
+ if (orig_app_abi_ver == -1) {
+ orig_app_abi_ver = new_abi_ver;
+ }
+
+ app_abi_ver = new_abi_ver;
+ }
+
+ strncpy(info.driver, DRV_NAME, 32);
+ strncpy(info.version, DRV_VERSION, 32);
+ snprintf(info.fw_version, 32, "%d", BOND_ABI_VERSION);
+
+ if (copy_to_user(addr, &info, sizeof(info))) {
+ return -EFAULT;
+ }
+
+ return 0;
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static int bond_info_query(struct net_device *bond_dev, struct ifbond *info)
+{
+ struct bonding *bond = bond_dev->priv;
+
+ info->bond_mode = bond->params.mode;
+ info->miimon = bond->params.miimon;
+
+ read_lock_bh(&bond->lock);
+ info->num_slaves = bond->slave_cnt;
+ read_unlock_bh(&bond->lock);
+
+ return 0;
+}
+
+static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *info)
+{
+ struct bonding *bond = bond_dev->priv;
+ struct slave *slave;
+ int i, found = 0;
+
+ if (info->slave_id < 0) {
+ return -ENODEV;
+ }
+
+ read_lock_bh(&bond->lock);
+
+ bond_for_each_slave(bond, slave, i) {
+ if (i == (int)info->slave_id) {
+ found = 1;
+ break;
+ }
+ }
+
+ read_unlock_bh(&bond->lock);
+
+ if (found) {
+ strcpy(info->slave_name, slave->dev->name);
+ info->link = slave->link;
+ info->state = slave->state;
+ info->link_failure_count = slave->link_failure_count;
+ } else {
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+/*-------------------------------- Monitoring -------------------------------*/
+
+/* this function is called regularly to monitor each slave's link. */
+static void bond_mii_monitor(struct net_device *bond_dev)
+{
+ struct bonding *bond = bond_dev->priv;
+ struct slave *slave, *oldcurrent;
+ int do_failover = 0;
+ int delta_in_ticks;
+ int i;
+
+ read_lock(&bond->lock);
+
+ delta_in_ticks = (bond->params.miimon * HZ) / 1000;
+
+ if (bond->kill_timers) {
+ goto out;
+ }
+
+ if (bond->slave_cnt == 0) {
+ goto re_arm;
+ }
+
+ /* 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.
+ */
+
+ read_lock(&bond->curr_slave_lock);
+ oldcurrent = bond->curr_active_slave;
+ read_unlock(&bond->curr_slave_lock);
+
+ bond_for_each_slave(bond, slave, i) {
+ struct net_device *slave_dev = slave->dev;
+ int link_state;
+ u16 old_speed = slave->speed;
+ u8 old_duplex = slave->duplex;
+
+ link_state = bond_check_dev_link(bond, slave_dev, 0);
+
+ switch (slave->link) {
+ case BOND_LINK_UP: /* the link was up */
+ if (link_state == BMSR_LSTATUS) {
+ /* link stays up, nothing more to do */
+ break;
+ } else { /* link going down */
+ slave->link = BOND_LINK_FAIL;
+ slave->delay = bond->params.downdelay;
+
+ if (slave->link_failure_count < UINT_MAX) {
+ slave->link_failure_count++;
+ }
+
+ if (bond->params.downdelay) {
+ printk(KERN_INFO DRV_NAME
+ ": %s: link status down for %s "
+ "interface %s, disabling it in "
+ "%d ms.\n",
+ bond_dev->name,
+ IS_UP(slave_dev)
+ ? ((bond->params.mode == BOND_MODE_ACTIVEBACKUP)
+ ? ((slave == oldcurrent)
+ ? "active " : "backup ")
+ : "")
+ : "idle ",
+ slave_dev->name,
+ bond->params.downdelay * bond->params.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 != BMSR_LSTATUS) {
+ /* 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 ((bond->params.mode == BOND_MODE_ACTIVEBACKUP) ||
+ (bond->params.mode == BOND_MODE_8023AD)) {
+ bond_set_slave_inactive_flags(slave);
+ }
+
+ printk(KERN_INFO DRV_NAME
+ ": %s: link status definitely "
+ "down for interface %s, "
+ "disabling it\n",
+ bond_dev->name,
+ slave_dev->name);
+
+ /* notify ad that the link status has changed */
+ if (bond->params.mode == BOND_MODE_8023AD) {
+ bond_3ad_handle_link_change(slave, BOND_LINK_DOWN);
+ }
+
+ if ((bond->params.mode == BOND_MODE_TLB) ||
+ (bond->params.mode == BOND_MODE_ALB)) {
+ bond_alb_handle_link_change(bond, slave, BOND_LINK_DOWN);
+ }
+
+ if (slave == oldcurrent) {
+ do_failover = 1;
+ }
+ } else {
+ slave->delay--;
+ }
+ } else {
+ /* link up again */
+ slave->link = BOND_LINK_UP;
+ slave->jiffies = jiffies;
+ printk(KERN_INFO DRV_NAME
+ ": %s: link status up again after %d "
+ "ms for interface %s.\n",
+ bond_dev->name,
+ (bond->params.downdelay - slave->delay) * bond->params.miimon,
+ slave_dev->name);
+ }
+ break;
+ case BOND_LINK_DOWN: /* the link was down */
+ if (link_state != BMSR_LSTATUS) {
+ /* the link stays down, nothing more to do */
+ break;
+ } else { /* link going up */
+ slave->link = BOND_LINK_BACK;
+ slave->delay = bond->params.updelay;
+
+ if (bond->params.updelay) {
+ /* if updelay == 0, no need to
+ advertise about a 0 ms delay */
+ printk(KERN_INFO DRV_NAME
+ ": %s: link status up for "
+ "interface %s, enabling it "
+ "in %d ms.\n",
+ bond_dev->name,
+ slave_dev->name,
+ bond->params.updelay * bond->params.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 != BMSR_LSTATUS) {
+ /* link down again */
+ slave->link = BOND_LINK_DOWN;
+
+ printk(KERN_INFO DRV_NAME
+ ": %s: link status down again after %d "
+ "ms for interface %s.\n",
+ bond_dev->name,
+ (bond->params.updelay - slave->delay) * bond->params.miimon,
+ slave_dev->name);
+ } else {
+ /* link stays up */
+ if (slave->delay == 0) {
+ /* now the link has been up for long time enough */
+ slave->link = BOND_LINK_UP;
+ slave->jiffies = jiffies;
+
+ if (bond->params.mode == BOND_MODE_8023AD) {
+ /* prevent it from being the active one */
+ slave->state = BOND_STATE_BACKUP;
+ } else if (bond->params.mode != BOND_MODE_ACTIVEBACKUP) {
+ /* make it immediately active */
+ slave->state = BOND_STATE_ACTIVE;
+ } else if (slave != bond->primary_slave) {
+ /* prevent it from being the active one */
+ slave->state = BOND_STATE_BACKUP;
+ }
+
+ printk(KERN_INFO DRV_NAME
+ ": %s: link status definitely "
+ "up for interface %s.\n",
+ bond_dev->name,
+ slave_dev->name);
+
+ /* notify ad that the link status has changed */
+ if (bond->params.mode == BOND_MODE_8023AD) {
+ bond_3ad_handle_link_change(slave, BOND_LINK_UP);
+ }
+
+ if ((bond->params.mode == BOND_MODE_TLB) ||
+ (bond->params.mode == BOND_MODE_ALB)) {
+ bond_alb_handle_link_change(bond, slave, BOND_LINK_UP);
+ }
+
+ if ((!oldcurrent) ||
+ (slave == bond->primary_slave)) {
+ do_failover = 1;
+ }
+ } else {
+ slave->delay--;
+ }
+ }
+ break;
+ default:
+ /* Should not happen */
+ printk(KERN_ERR "bonding: Error: %s Illegal value (link=%d)\n",
+ slave->dev->name, slave->link);
+ goto out;
+ } /* end of switch (slave->link) */
+
+ bond_update_speed_duplex(slave);
+
+ if (bond->params.mode == BOND_MODE_8023AD) {
+ if (old_speed != slave->speed) {
+ bond_3ad_adapter_speed_changed(slave);
+ }
+
+ if (old_duplex != slave->duplex) {
+ bond_3ad_adapter_duplex_changed(slave);
+ }
+ }
+
+ } /* end of for */
+
+ if (do_failover) {
+ write_lock(&bond->curr_slave_lock);
+
+ bond_select_active_slave(bond);
+
+ if (oldcurrent && !bond->curr_active_slave) {
+ printk(KERN_INFO DRV_NAME
+ ": %s: now running without any active "
+ "interface !\n",
+ bond_dev->name);
+ }
+
+ write_unlock(&bond->curr_slave_lock);
+ }
+
+re_arm:
+ if (bond->params.miimon) {
+ mod_timer(&bond->mii_timer, jiffies + delta_in_ticks);
+ }
+out:
+ read_unlock(&bond->lock);
+}
+
+static void bond_arp_send_all(struct bonding *bond, struct slave *slave)
+{
+ int i;
+ u32 *targets = bond->params.arp_targets;
+
+ for (i = 0; (i < BOND_MAX_ARP_TARGETS) && targets[i]; i++) {
+ arp_send(ARPOP_REQUEST, ETH_P_ARP, targets[i], slave->dev,
+ my_ip, NULL, slave->dev->dev_addr,
+ NULL);
+ }
+}
+
+/*
+ * this function is called regularly to monitor each slave's link
+ * ensuring that traffic is being sent and received when arp monitoring
+ * is used in load-balancing mode. if the adapter has been dormant, then an
+ * arp is transmitted to generate traffic. see activebackup_arp_monitor for
+ * arp monitoring in active backup mode.
+ */
+static void bond_loadbalance_arp_mon(struct net_device *bond_dev)
+{
+ struct bonding *bond = bond_dev->priv;
+ struct slave *slave, *oldcurrent;
+ int do_failover = 0;
+ int delta_in_ticks;
+ int i;
+
+ read_lock(&bond->lock);
+
+ delta_in_ticks = (bond->params.arp_interval * HZ) / 1000;
+
+ if (bond->kill_timers) {
+ goto out;
+ }
+
+ if (bond->slave_cnt == 0) {
+ goto re_arm;
+ }
+
+ read_lock(&bond->curr_slave_lock);
+ oldcurrent = bond->curr_active_slave;
+ read_unlock(&bond->curr_slave_lock);
+
+ /* see if any of the previous devices are up now (i.e. they have
+ * xmt and rcv traffic). the curr_active_slave does not come into
+ * the picture unless it is null. also, slave->jiffies is not needed
+ * here because we send an arp on each slave and give a slave as
+ * long as it needs to get the tx/rx within the delta.
+ * TODO: what about up/down delay in arp mode? it wasn't here before
+ * so it can wait
+ */
+ bond_for_each_slave(bond, slave, i) {
+ if (slave->link != BOND_LINK_UP) {
+ if (((jiffies - slave->dev->trans_start) <= delta_in_ticks) &&
+ ((jiffies - slave->dev->last_rx) <= delta_in_ticks)) {
+
+ slave->link = BOND_LINK_UP;
+ slave->state = BOND_STATE_ACTIVE;
+
+ /* primary_slave has no meaning in round-robin
+ * mode. the window of a slave being up and
+ * curr_active_slave being null after enslaving
+ * is closed.
+ */
+ if (!oldcurrent) {
+ printk(KERN_INFO DRV_NAME
+ ": %s: link status definitely "
+ "up for interface %s, ",
+ bond_dev->name,
+ slave->dev->name);
+ do_failover = 1;
+ } else {
+ printk(KERN_INFO DRV_NAME
+ ": %s: interface %s is now up\n",
+ bond_dev->name,
+ slave->dev->name);
+ }
+ }
+ } else {
+ /* slave->link == BOND_LINK_UP */
+
+ /* not all switches will respond to an arp request
+ * when the source ip is 0, so don't take the link down
+ * if we don't know our ip yet
+ */
+ if (((jiffies - slave->dev->trans_start) >= (2*delta_in_ticks)) ||
+ (((jiffies - slave->dev->last_rx) >= (2*delta_in_ticks)) &&
+ my_ip)) {
+
+ slave->link = BOND_LINK_DOWN;
+ slave->state = BOND_STATE_BACKUP;
+
+ if (slave->link_failure_count < UINT_MAX) {
+ slave->link_failure_count++;
+ }
+
+ printk(KERN_INFO DRV_NAME
+ ": %s: interface %s is now down.\n",
+ bond_dev->name,
+ slave->dev->name);
+
+ if (slave == oldcurrent) {
+ do_failover = 1;
+ }
+ }
+ }
+
+ /* note: if switch is in round-robin mode, all links
+ * must tx arp to ensure all links rx an arp - otherwise
+ * links may oscillate or not come up at all; if switch is
+ * in something like xor mode, there is nothing we can
+ * do - all replies will be rx'ed on same link causing slaves
+ * to be unstable during low/no traffic periods
+ */
+ if (IS_UP(slave->dev)) {
+ bond_arp_send_all(bond, slave);
+ }
+ }
+
+ if (do_failover) {
+ write_lock(&bond->curr_slave_lock);
+
+ bond_select_active_slave(bond);
+
+ if (oldcurrent && !bond->curr_active_slave) {
+ printk(KERN_INFO DRV_NAME
+ ": %s: now running without any active "
+ "interface !\n",
+ bond_dev->name);
+ }
+
+ write_unlock(&bond->curr_slave_lock);
+ }
+
+re_arm:
+ if (bond->params.arp_interval) {
+ mod_timer(&bond->arp_timer, jiffies + delta_in_ticks);
+ }
+out:
+ read_unlock(&bond->lock);
+}
+
+/*
+ * When using arp monitoring in active-backup mode, this function is
+ * called to determine if any backup slaves have went down or a new
+ * current slave needs to be found.
+ * The backup slaves never generate traffic, they are considered up by merely
+ * receiving traffic. If the current slave goes down, each backup slave will
+ * be given the opportunity to tx/rx an arp before being taken down - this
+ * prevents all slaves from being taken down due to the current slave not
+ * sending any traffic for the backups to receive. The arps are not necessarily
+ * necessary, any tx and rx traffic will keep the current slave up. While any
+ * rx traffic will keep the backup slaves up, the current slave is responsible
+ * for generating traffic to keep them up regardless of any other traffic they
+ * may have received.
+ * see loadbalance_arp_monitor for arp monitoring in load balancing mode
+ */
+static void bond_activebackup_arp_mon(struct net_device *bond_dev)
+{
+ struct bonding *bond = bond_dev->priv;
+ struct slave *slave;
+ int delta_in_ticks;
+ int i;
+
+ read_lock(&bond->lock);
+
+ delta_in_ticks = (bond->params.arp_interval * HZ) / 1000;
+
+ if (bond->kill_timers) {
+ goto out;
+ }
+
+ if (bond->slave_cnt == 0) {
+ goto re_arm;
+ }
+
+ /* determine if any slave has come up or any backup slave has
+ * gone down
+ * TODO: what about up/down delay in arp mode? it wasn't here before
+ * so it can wait
+ */
+ bond_for_each_slave(bond, slave, i) {
+ if (slave->link != BOND_LINK_UP) {
+ if ((jiffies - slave->dev->last_rx) <= delta_in_ticks) {
+
+ slave->link = BOND_LINK_UP;
+
+ write_lock(&bond->curr_slave_lock);
+
+ if ((!bond->curr_active_slave) &&
+ ((jiffies - slave->dev->trans_start) <= delta_in_ticks)) {
+ bond_change_active_slave(bond, slave);
+ bond->current_arp_slave = NULL;
+ } else if (bond->curr_active_slave != slave) {
+ /* this slave has just come up but we
+ * already have a current slave; this
+ * can also happen if bond_enslave adds
+ * a new slave that is up while we are
+ * searching for a new slave
+ */
+ bond_set_slave_inactive_flags(slave);
+ bond->current_arp_slave = NULL;
+ }
+
+ if (slave == bond->curr_active_slave) {
+ printk(KERN_INFO DRV_NAME
+ ": %s: %s is up and now the "
+ "active interface\n",
+ bond_dev->name,
+ slave->dev->name);
+ } else {
+ printk(KERN_INFO DRV_NAME
+ ": %s: backup interface %s is "
+ "now up\n",
+ bond_dev->name,
+ slave->dev->name);
+ }
+
+ write_unlock(&bond->curr_slave_lock);
+ }
+ } else {
+ read_lock(&bond->curr_slave_lock);
+
+ if ((slave != bond->curr_active_slave) &&
+ (!bond->current_arp_slave) &&
+ (((jiffies - slave->dev->last_rx) >= 3*delta_in_ticks) &&
+ my_ip)) {
+ /* a backup slave has gone down; three times
+ * the delta allows the current slave to be
+ * taken out before the backup slave.
+ * note: a non-null current_arp_slave indicates
+ * the curr_active_slave went down and we are
+ * searching for a new one; under this
+ * condition we only take the curr_active_slave
+ * down - this gives each slave a chance to
+ * tx/rx traffic before being taken out
+ */
+
+ read_unlock(&bond->curr_slave_lock);
+
+ slave->link = BOND_LINK_DOWN;
+
+ if (slave->link_failure_count < UINT_MAX) {
+ slave->link_failure_count++;
+ }
+
+ bond_set_slave_inactive_flags(slave);
+
+ printk(KERN_INFO DRV_NAME
+ ": %s: backup interface %s is now down\n",
+ bond_dev->name,
+ slave->dev->name);
+ } else {
+ read_unlock(&bond->curr_slave_lock);
+ }
+ }
+ }
+
+ read_lock(&bond->curr_slave_lock);
+ slave = bond->curr_active_slave;
+ read_unlock(&bond->curr_slave_lock);
+
+ if (slave) {
+ /* if we have sent traffic in the past 2*arp_intervals but
+ * haven't xmit and rx traffic in that time interval, select
+ * a different slave. slave->jiffies is only updated when
+ * a slave first becomes the curr_active_slave - not necessarily
+ * after every arp; this ensures the slave has a full 2*delta
+ * before being taken out. if a primary is being used, check
+ * if it is up and needs to take over as the curr_active_slave
+ */
+ if ((((jiffies - slave->dev->trans_start) >= (2*delta_in_ticks)) ||
+ (((jiffies - slave->dev->last_rx) >= (2*delta_in_ticks)) &&
+ my_ip)) &&
+ ((jiffies - slave->jiffies) >= 2*delta_in_ticks)) {
+
+ slave->link = BOND_LINK_DOWN;
+
+ if (slave->link_failure_count < UINT_MAX) {
+ slave->link_failure_count++;
+ }
+
+ printk(KERN_INFO DRV_NAME
+ ": %s: link status down for active interface "
+ "%s, disabling it\n",
+ bond_dev->name,
+ slave->dev->name);
+
+ write_lock(&bond->curr_slave_lock);
+
+ bond_select_active_slave(bond);
+ slave = bond->curr_active_slave;
+
+ write_unlock(&bond->curr_slave_lock);
+
+ bond->current_arp_slave = slave;
+
+ if (slave) {
+ slave->jiffies = jiffies;
+ }
+ } else if ((bond->primary_slave) &&
+ (bond->primary_slave != slave) &&
+ (bond->primary_slave->link == BOND_LINK_UP)) {
+ /* at this point, slave is the curr_active_slave */
+ printk(KERN_INFO DRV_NAME
+ ": %s: changing from interface %s to primary "
+ "interface %s\n",
+ bond_dev->name,
+ slave->dev->name,
+ bond->primary_slave->dev->name);
+
+ /* primary is up so switch to it */
+ write_lock(&bond->curr_slave_lock);
+ bond_change_active_slave(bond, bond->primary_slave);
+ write_unlock(&bond->curr_slave_lock);
+
+ slave = bond->primary_slave;
+ slave->jiffies = jiffies;
+ } else {
+ bond->current_arp_slave = NULL;
+ }
+
+ /* the current slave must tx an arp to ensure backup slaves
+ * rx traffic
+ */
+ if (slave && my_ip) {
+ bond_arp_send_all(bond, slave);
+ }
+ }
+
+ /* if we don't have a curr_active_slave, search for the next available
+ * backup slave from the current_arp_slave and make it the candidate
+ * for becoming the curr_active_slave
+ */
+ if (!slave) {
+ if (!bond->current_arp_slave) {
+ bond->current_arp_slave = bond->first_slave;
+ }
+
+ if (bond->current_arp_slave) {
+ bond_set_slave_inactive_flags(bond->current_arp_slave);
+
+ /* search for next candidate */
+ bond_for_each_slave_from(bond, slave, i, bond->current_arp_slave) {
+ if (IS_UP(slave->dev)) {
+ slave->link = BOND_LINK_BACK;
+ bond_set_slave_active_flags(slave);
+ bond_arp_send_all(bond, slave);
+ slave->jiffies = jiffies;
+ bond->current_arp_slave = slave;
+ break;
+ }
+
+ /* if the link state is up at this point, we
+ * mark it down - this can happen if we have
+ * simultaneous link failures and
+ * reselect_active_interface doesn't make this
+ * one the current slave so it is still marked
+ * up when it is actually down
+ */
+ if (slave->link == BOND_LINK_UP) {
+ slave->link = BOND_LINK_DOWN;
+ if (slave->link_failure_count < UINT_MAX) {
+ slave->link_failure_count++;
+ }
+
+ bond_set_slave_inactive_flags(slave);
+
+ printk(KERN_INFO DRV_NAME
+ ": %s: backup interface %s is "
+ "now down.\n",
+ bond_dev->name,
+ slave->dev->name);
+ }
+ }
+ }
+ }
+
+re_arm:
+ if (bond->params.arp_interval) {
+ mod_timer(&bond->arp_timer, jiffies + delta_in_ticks);
+ }
+out:
+ read_unlock(&bond->lock);
+}
+
+/*------------------------------ proc/seq_file-------------------------------*/
+
+#ifdef CONFIG_PROC_FS
+
+#define SEQ_START_TOKEN ((void *)1)
+
+static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos)
+{
+ struct bonding *bond = seq->private;
+ loff_t off = 0;
+ struct slave *slave;
+ int i;
+
+ /* make sure the bond won't be taken away */
+ read_lock(&dev_base_lock);
+ read_lock_bh(&bond->lock);
+
+ if (*pos == 0) {
+ return SEQ_START_TOKEN;
+ }
+
+ bond_for_each_slave(bond, slave, i) {
+ if (++off == *pos) {
+ return slave;
+ }
+ }
+
+ return NULL;
+}
+
+static void *bond_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+ struct bonding *bond = seq->private;
+ struct slave *slave = v;
+
+ ++*pos;
+ if (v == SEQ_START_TOKEN) {
+ return bond->first_slave;
+ }
+
+ slave = slave->next;
+
+ return (slave == bond->first_slave) ? NULL : slave;
+}
+
+static void bond_info_seq_stop(struct seq_file *seq, void *v)
+{
+ struct bonding *bond = seq->private;
+
+ read_unlock_bh(&bond->lock);
+ read_unlock(&dev_base_lock);
+}
+
+static void bond_info_show_master(struct seq_file *seq)
+{
+ struct bonding *bond = seq->private;
+ struct slave *curr;
+
+ read_lock(&bond->curr_slave_lock);
+ curr = bond->curr_active_slave;
+ read_unlock(&bond->curr_slave_lock);
+
+ seq_printf(seq, "Bonding Mode: %s\n",
+ bond_mode_name(bond->params.mode));
+
+ if (USES_PRIMARY(bond->params.mode)) {
+ seq_printf(seq, "Primary Slave: %s\n",
+ (bond->params.primary[0]) ?
+ bond->params.primary : "None");
+
+ seq_printf(seq, "Currently Active Slave: %s\n",
+ (curr) ? curr->dev->name : "None");
+ }
+
+ seq_printf(seq, "MII Status: %s\n", (curr) ? "up" : "down");
+ seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon);
+ seq_printf(seq, "Up Delay (ms): %d\n",
+ bond->params.updelay * bond->params.miimon);
+ seq_printf(seq, "Down Delay (ms): %d\n",
+ bond->params.downdelay * bond->params.miimon);
+
+ if (bond->params.mode == BOND_MODE_8023AD) {
+ struct ad_info ad_info;
+
+ seq_puts(seq, "\n802.3ad info\n");
+ seq_printf(seq, "LACP rate: %s\n",
+ (bond->params.lacp_fast) ? "fast" : "slow");
+
+ if (bond_3ad_get_active_agg_info(bond, &ad_info)) {
+ seq_printf(seq, "bond %s has no active aggregator\n",
+ bond->dev->name);
+ } else {
+ seq_printf(seq, "Active Aggregator Info:\n");
+
+ seq_printf(seq, "\tAggregator ID: %d\n",
+ ad_info.aggregator_id);
+ seq_printf(seq, "\tNumber of ports: %d\n",
+ ad_info.ports);
+ seq_printf(seq, "\tActor Key: %d\n",
+ ad_info.actor_key);
+ seq_printf(seq, "\tPartner Key: %d\n",
+ ad_info.partner_key);
+ seq_printf(seq, "\tPartner Mac Address: %02x:%02x:%02x:%02x:%02x:%02x\n",
+ ad_info.partner_system[0],
+ ad_info.partner_system[1],
+ ad_info.partner_system[2],
+ ad_info.partner_system[3],
+ ad_info.partner_system[4],
+ ad_info.partner_system[5]);
+ }
+ }
+}
+
+static void bond_info_show_slave(struct seq_file *seq, const struct slave *slave)
+{
+ struct bonding *bond = seq->private;
+
+ seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name);
+ seq_printf(seq, "MII Status: %s\n",
+ (slave->link == BOND_LINK_UP) ? "up" : "down");
+ seq_printf(seq, "Link Failure Count: %d\n",
+ slave->link_failure_count);
+
+ if (app_abi_ver >= 1) {
+ seq_printf(seq,
+ "Permanent HW addr: %02x:%02x:%02x:%02x:%02x:%02x\n",
+ slave->perm_hwaddr[0],
+ slave->perm_hwaddr[1],
+ slave->perm_hwaddr[2],
+ slave->perm_hwaddr[3],
+ slave->perm_hwaddr[4],
+ slave->perm_hwaddr[5]);
+ }
+
+ if (bond->params.mode == BOND_MODE_8023AD) {
+ const struct aggregator *agg
+ = SLAVE_AD_INFO(slave).port.aggregator;
+
+ if (agg) {
+ seq_printf(seq, "Aggregator ID: %d\n",
+ agg->aggregator_identifier);
+ } else {
+ seq_puts(seq, "Aggregator ID: N/A\n");
+ }
+ }
+}
+
+static int bond_info_seq_show(struct seq_file *seq, void *v)
+{
+ if (v == SEQ_START_TOKEN) {
+ seq_printf(seq, "%s\n", version);
+ bond_info_show_master(seq);
+ } else {
+ bond_info_show_slave(seq, v);
+ }
+
+ return 0;
+}
+
+static struct seq_operations bond_info_seq_ops = {
+ .start = bond_info_seq_start,
+ .next = bond_info_seq_next,
+ .stop = bond_info_seq_stop,
+ .show = bond_info_seq_show,
+};
+
+static int bond_info_open(struct inode *inode, struct file *file)
+{
+ struct seq_file *seq;
+ struct proc_dir_entry *proc;
+ int res;
+
+ res = seq_open(file, &bond_info_seq_ops);
+ if (!res) {
+ /* recover the pointer buried in proc_dir_entry data */
+ seq = file->private_data;
+ proc = PDE(inode);
+ seq->private = proc->data;
+ }
+
+ return res;
+}
+
+static struct file_operations bond_info_fops = {
+ .owner = THIS_MODULE,
+ .open = bond_info_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+static int bond_create_proc_entry(struct bonding *bond)
+{
+ struct net_device *bond_dev = bond->dev;
+
+ if (bond_proc_dir) {
+ bond->proc_entry = create_proc_entry(bond_dev->name,
+ S_IRUGO,
+ bond_proc_dir);
+ if (bond->proc_entry == NULL) {
+ printk(KERN_WARNING DRV_NAME
+ ": Warning: Cannot create /proc/net/%s/%s\n",
+ DRV_NAME, bond_dev->name);
+ } else {
+ bond->proc_entry->data = bond;
+ bond->proc_entry->proc_fops = &bond_info_fops;
+ bond->proc_entry->owner = THIS_MODULE;
+ memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ);
+ }
+ }
+
+ return 0;
+}
+
+static void bond_remove_proc_entry(struct bonding *bond)
+{
+ if (bond_proc_dir && bond->proc_entry) {
+ remove_proc_entry(bond->proc_file_name, bond_proc_dir);
+ memset(bond->proc_file_name, 0, IFNAMSIZ);
+ bond->proc_entry = NULL;
+ }
+}
+
+/* Create the bonding directory under /proc/net, if doesn't exist yet.
+ * Caller must hold rtnl_lock.
+ */
+static void bond_create_proc_dir(void)
+{
+ int len = strlen(DRV_NAME);
+
+ for (bond_proc_dir = proc_net->subdir; bond_proc_dir;
+ bond_proc_dir = bond_proc_dir->next) {
+ if ((bond_proc_dir->namelen == len) &&
+ !memcmp(bond_proc_dir->name, DRV_NAME, len)) {
+ break;
+ }
+ }
+
+ if (!bond_proc_dir) {
+ bond_proc_dir = proc_mkdir(DRV_NAME, proc_net);
+ if (bond_proc_dir) {
+ bond_proc_dir->owner = THIS_MODULE;
+ } else {
+ printk(KERN_WARNING DRV_NAME
+ ": Warning: cannot create /proc/net/%s\n",
+ DRV_NAME);
+ }
+ }
+}
+
+/* Destroy the bonding directory under /proc/net, if empty.
+ * Caller must hold rtnl_lock.
+ */
+static void bond_destroy_proc_dir(void)
+{
+ struct proc_dir_entry *de;
+
+ if (!bond_proc_dir) {
+ return;
+ }
+
+ /* verify that the /proc dir is empty */
+ for (de = bond_proc_dir->subdir; de; de = de->next) {
+ /* ignore . and .. */
+ if (*(de->name) != '.') {
+ break;
+ }
+ }
+
+ if (de) {
+ if (bond_proc_dir->owner == THIS_MODULE) {
+ bond_proc_dir->owner = NULL;
+ }
+ } else {
+ remove_proc_entry(DRV_NAME, proc_net);
+ bond_proc_dir = NULL;
+ }
+}
+#endif /* CONFIG_PROC_FS */
+
+/*-------------------------- netdev event handling --------------------------*/
+
+/*
+ * Change device name
+ */
+static int bond_event_changename(struct bonding *bond)
+{
+#ifdef CONFIG_PROC_FS
+ bond_remove_proc_entry(bond);
+ bond_create_proc_entry(bond);
+#endif
+
+ return NOTIFY_DONE;
+}
+
+static int bond_master_netdev_event(unsigned long event, struct net_device *bond_dev)
+{
+ struct bonding *event_bond = bond_dev->priv;
+
+ switch (event) {
+ case NETDEV_CHANGENAME:
+ return bond_event_changename(event_bond);
+ case NETDEV_UNREGISTER:
+ /*
+ * TODO: remove a bond from the list?
+ */
+ break;
+ default:
+ break;
+ }
+
+ return NOTIFY_DONE;
+}
+
+static int bond_slave_netdev_event(unsigned long event, struct net_device *slave_dev)
+{
+ struct net_device *bond_dev = slave_dev->master;
+
+ switch (event) {
+ case NETDEV_UNREGISTER:
+ if (bond_dev) {
+ bond_release(bond_dev, slave_dev);
+ }
+ break;
+ case NETDEV_CHANGE:
+ /*
+ * TODO: is this what we get if somebody
+ * sets up a hierarchical bond, then rmmod's
+ * one of the slave bonding devices?
+ */
+ break;
+ case NETDEV_DOWN:
+ /*
+ * ... Or is it this?
+ */
+ break;
+ case NETDEV_CHANGEMTU:
+ /*
+ * TODO: Should slaves be allowed to
+ * independently alter their MTU? For
+ * an active-backup bond, slaves need
+ * not be the same type of device, so
+ * MTUs may vary. For other modes,
+ * slaves arguably should have the
+ * same MTUs. To do this, we'd need to
+ * take over the slave's change_mtu
+ * function for the duration of their
+ * servitude.
+ */
+ break;
+ case NETDEV_CHANGENAME:
+ /*
+ * TODO: handle changing the primary's name
+ */
+ break;
+ default:
+ break;
+ }
+
+ return NOTIFY_DONE;
+}
+
+/*
+ * bond_netdev_event: handle netdev notifier chain events.
+ *
+ * This function receives events for the netdev chain. The caller (an
+ * ioctl handler calling notifier_call_chain) holds the necessary
+ * locks for us to safely manipulate the slave devices (RTNL lock,
+ * dev_probe_lock).
+ */
+static int bond_netdev_event(struct notifier_block *this, unsigned long event, void *ptr)
+{
+ struct net_device *event_dev = (struct net_device *)ptr;
+
+ dprintk("event_dev: %s, event: %lx\n",
+ (event_dev ? event_dev->name : "None"),
+ event);
+
+ if (event_dev->flags & IFF_MASTER) {
+ dprintk("IFF_MASTER\n");
+ return bond_master_netdev_event(event, event_dev);
+ }
+
+ if (event_dev->flags & IFF_SLAVE) {
+ dprintk("IFF_SLAVE\n");
+ return bond_slave_netdev_event(event, event_dev);
+ }
+
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block bond_netdev_notifier = {
+ .notifier_call = bond_netdev_event,
+};
+
+/*-------------------------- Packet type handling ---------------------------*/
+
+/* register to receive lacpdus on a bond */
+static void bond_register_lacpdu(struct bonding *bond)
+{
+ struct packet_type *pk_type = &(BOND_AD_INFO(bond).ad_pkt_type);
+
+ /* initialize packet type */
+ pk_type->type = PKT_TYPE_LACPDU;
+ pk_type->dev = bond->dev;
+ pk_type->func = bond_3ad_lacpdu_recv;
+
+ dev_add_pack(pk_type);
+}
+
+/* unregister to receive lacpdus on a bond */
+static void bond_unregister_lacpdu(struct bonding *bond)
+{
+ dev_remove_pack(&(BOND_AD_INFO(bond).ad_pkt_type));
+}
+
+/*-------------------------- Device entry points ----------------------------*/
+
+static int bond_open(struct net_device *bond_dev)
+{
+ struct bonding *bond = bond_dev->priv;
+ struct timer_list *mii_timer = &bond->mii_timer;
+ struct timer_list *arp_timer = &bond->arp_timer;
+
+ bond->kill_timers = 0;
+
+ if ((bond->params.mode == BOND_MODE_TLB) ||
+ (bond->params.mode == BOND_MODE_ALB)) {
+ struct timer_list *alb_timer = &(BOND_ALB_INFO(bond).alb_timer);
+
+ /* bond_alb_initialize must be called before the timer
+ * is started.
+ */
+ if (bond_alb_initialize(bond, (bond->params.mode == BOND_MODE_ALB))) {
+ /* something went wrong - fail the open operation */
+ return -1;
+ }
+
+ init_timer(alb_timer);
+ alb_timer->expires = jiffies + 1;
+ alb_timer->data = (unsigned long)bond;
+ alb_timer->function = (void *)&bond_alb_monitor;
+ add_timer(alb_timer);
+ }
+
+ if (bond->params.miimon) { /* link check interval, in milliseconds. */
+ init_timer(mii_timer);
+ mii_timer->expires = jiffies + 1;
+ mii_timer->data = (unsigned long)bond_dev;
+ mii_timer->function = (void *)&bond_mii_monitor;
+ add_timer(mii_timer);
+ }
+
+ if (bond->params.arp_interval) { /* arp interval, in milliseconds. */
+ init_timer(arp_timer);
+ arp_timer->expires = jiffies + 1;
+ arp_timer->data = (unsigned long)bond_dev;
+ if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) {
+ arp_timer->function = (void *)&bond_activebackup_arp_mon;
+ } else {
+ arp_timer->function = (void *)&bond_loadbalance_arp_mon;
+ }
+ add_timer(arp_timer);
+ }
+
+ if (bond->params.mode == BOND_MODE_8023AD) {
+ struct timer_list *ad_timer = &(BOND_AD_INFO(bond).ad_timer);
+ init_timer(ad_timer);
+ ad_timer->expires = jiffies + 1;
+ ad_timer->data = (unsigned long)bond;
+ ad_timer->function = (void *)&bond_3ad_state_machine_handler;
+ add_timer(ad_timer);
+
+ /* register to receive LACPDUs */
+ bond_register_lacpdu(bond);
+ }
+
+ return 0;
+}
+
+static int bond_close(struct net_device *bond_dev)
+{
+ struct bonding *bond = bond_dev->priv;
+
+ if (bond->params.mode == BOND_MODE_8023AD) {
+ /* Unregister the receive of LACPDUs */
+ bond_unregister_lacpdu(bond);
+ }
+
+ write_lock_bh(&bond->lock);
+
+ bond_mc_list_destroy(bond);
+
+ /* signal timers not to re-arm */
+ bond->kill_timers = 1;
+
+ write_unlock_bh(&bond->lock);
+
+ /* del_timer_sync must run without holding the bond->lock
+ * because a running timer might be trying to hold it too
+ */
+
+ if (bond->params.miimon) { /* link check interval, in milliseconds. */
+ del_timer_sync(&bond->mii_timer);
+ }
+
+ if (bond->params.arp_interval) { /* arp interval, in milliseconds. */
+ del_timer_sync(&bond->arp_timer);
+ }
+
+ switch (bond->params.mode) {
+ case BOND_MODE_8023AD:
+ del_timer_sync(&(BOND_AD_INFO(bond).ad_timer));
+ break;
+ case BOND_MODE_TLB:
+ case BOND_MODE_ALB:
+ del_timer_sync(&(BOND_ALB_INFO(bond).alb_timer));
+ break;
+ default:
+ break;
+ }
+
+ /* Release the bonded slaves */
+ bond_release_all(bond_dev);
+
+ if ((bond->params.mode == BOND_MODE_TLB) ||
+ (bond->params.mode == BOND_MODE_ALB)) {
+ /* Must be called only after all
+ * slaves have been released
+ */
+ bond_alb_deinitialize(bond);
+ }
+
+ return 0;
+}
+
+static struct net_device_stats *bond_get_stats(struct net_device *bond_dev)
+{
+ struct bonding *bond = bond_dev->priv;
+ struct net_device_stats *stats = &(bond->stats), *sstats;
+ struct slave *slave;
+ int i;
+
+ memset(stats, 0, sizeof(struct net_device_stats));
+
+ read_lock_bh(&bond->lock);
+
+ bond_for_each_slave(bond, slave, i) {
+ 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_bh(&bond->lock);
+
+ return stats;
+}
+
+static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd)
+{
+ struct net_device *slave_dev = NULL;
+ struct ifbond k_binfo;
+ struct ifbond __user *u_binfo = NULL;
+ struct ifslave k_sinfo;
+ struct ifslave __user *u_sinfo = NULL;
+ struct mii_ioctl_data *mii = NULL;
+ int prev_abi_ver = orig_app_abi_ver;
+ int res = 0;
+
+ dprintk("bond_ioctl: master=%s, cmd=%d\n",
+ bond_dev->name, cmd);
+
+ switch (cmd) {
+ case SIOCETHTOOL:
+ return bond_ethtool_ioctl(bond_dev, ifr);
+ case SIOCGMIIPHY:
+ mii = if_mii(ifr);
+ if (!mii) {
+ return -EINVAL;
+ }
+ mii->phy_id = 0;
+ /* Fall Through */
+ case SIOCGMIIREG:
+ /*
+ * We do this again just in case we were called by SIOCGMIIREG
+ * instead of SIOCGMIIPHY.
+ */
+ mii = if_mii(ifr);
+ if (!mii) {
+ return -EINVAL;
+ }
+
+ if (mii->reg_num == 1) {
+ struct bonding *bond = bond_dev->priv;
+ mii->val_out = 0;
+ read_lock_bh(&bond->lock);
+ read_lock(&bond->curr_slave_lock);
+ if (bond->curr_active_slave) {
+ mii->val_out = BMSR_LSTATUS;
+ }
+ read_unlock(&bond->curr_slave_lock);
+ read_unlock_bh(&bond->lock);
+ }
+
+ return 0;
+ case BOND_INFO_QUERY_OLD:
+ case SIOCBONDINFOQUERY:
+ u_binfo = (struct ifbond __user *)ifr->ifr_data;
+
+ if (copy_from_user(&k_binfo, u_binfo, sizeof(ifbond))) {
+ return -EFAULT;
+ }
+
+ res = bond_info_query(bond_dev, &k_binfo);
+ if (res == 0) {
+ if (copy_to_user(u_binfo, &k_binfo, sizeof(ifbond))) {
+ return -EFAULT;
+ }
+ }
+
+ return res;
+ case BOND_SLAVE_INFO_QUERY_OLD:
+ case SIOCBONDSLAVEINFOQUERY:
+ u_sinfo = (struct ifslave __user *)ifr->ifr_data;
+
+ if (copy_from_user(&k_sinfo, u_sinfo, sizeof(ifslave))) {
+ return -EFAULT;
+ }
+
+ res = bond_slave_info_query(bond_dev, &k_sinfo);
+ if (res == 0) {
+ if (copy_to_user(u_sinfo, &k_sinfo, sizeof(ifslave))) {
+ return -EFAULT;
+ }
+ }
+
+ return res;
+ default:
+ /* Go on */
+ break;
+ }
+
+ if (!capable(CAP_NET_ADMIN)) {
+ return -EPERM;
+ }
+
+ if (orig_app_abi_ver == -1) {
+ /* no orig_app_abi_ver was provided yet, so we'll use the
+ * current one from now on, even if it's 0
+ */
+ orig_app_abi_ver = app_abi_ver;
+
+ } else if (orig_app_abi_ver != app_abi_ver) {
+ printk(KERN_ERR DRV_NAME
+ ": Error: already using ifenslave ABI version %d; to "
+ "upgrade ifenslave to version %d, you must first "
+ "reload bonding.\n",
+ orig_app_abi_ver, app_abi_ver);
+ return -EINVAL;
+ }
+
+ slave_dev = dev_get_by_name(ifr->ifr_slave);
+
+ dprintk("slave_dev=%p: \n", slave_dev);
+
+ if (!slave_dev) {
+ res = -ENODEV;
+ } else {
+ dprintk("slave_dev->name=%s: \n", slave_dev->name);
+ switch (cmd) {
+ case BOND_ENSLAVE_OLD:
+ case SIOCBONDENSLAVE:
+ res = bond_enslave(bond_dev, slave_dev);
+ break;
+ case BOND_RELEASE_OLD:
+ case SIOCBONDRELEASE:
+ res = bond_release(bond_dev, slave_dev);
+ break;
+ case BOND_SETHWADDR_OLD:
+ case SIOCBONDSETHWADDR:
+ res = bond_sethwaddr(bond_dev, slave_dev);
+ break;
+ case BOND_CHANGE_ACTIVE_OLD:
+ case SIOCBONDCHANGEACTIVE:
+ res = bond_ioctl_change_active(bond_dev, slave_dev);
+ break;
+ default:
+ res = -EOPNOTSUPP;
+ }
+
+ dev_put(slave_dev);
+ }
+
+ if (res < 0) {
+ /* The ioctl failed, so there's no point in changing the
+ * orig_app_abi_ver. We'll restore it's value just in case
+ * we've changed it earlier in this function.
+ */
+ orig_app_abi_ver = prev_abi_ver;
+ }
+
+ return res;
+}
+
+static void bond_set_multicast_list(struct net_device *bond_dev)
+{
+ struct bonding *bond = bond_dev->priv;
+ struct dev_mc_list *dmi;
+
+ write_lock_bh(&bond->lock);
+
+ /*
+ * Do promisc before checking multicast_mode
+ */
+ if ((bond_dev->flags & IFF_PROMISC) && !(bond->flags & IFF_PROMISC)) {
+ bond_set_promiscuity(bond, 1);
+ }
+
+ if (!(bond_dev->flags & IFF_PROMISC) && (bond->flags & IFF_PROMISC)) {
+ bond_set_promiscuity(bond, -1);
+ }
+
+ /* set allmulti flag to slaves */
+ if ((bond_dev->flags & IFF_ALLMULTI) && !(bond->flags & IFF_ALLMULTI)) {
+ bond_set_allmulti(bond, 1);
+ }
+
+ if (!(bond_dev->flags & IFF_ALLMULTI) && (bond->flags & IFF_ALLMULTI)) {
+ bond_set_allmulti(bond, -1);
+ }
+
+ bond->flags = bond_dev->flags;
+
+ /* looking for addresses to add to slaves' mc list */
+ for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) {
+ if (!bond_mc_list_find_dmi(dmi, bond->mc_list)) {
+ bond_mc_add(bond, dmi->dmi_addr, dmi->dmi_addrlen);
+ }
+ }
+
+ /* looking for addresses to delete from slaves' list */
+ for (dmi = bond->mc_list; dmi; dmi = dmi->next) {
+ if (!bond_mc_list_find_dmi(dmi, bond_dev->mc_list)) {
+ bond_mc_delete(bond, dmi->dmi_addr, dmi->dmi_addrlen);
+ }
+ }
+
+ /* save master's multicast list */
+ bond_mc_list_destroy(bond);
+ bond_mc_list_copy(bond_dev->mc_list, bond, GFP_ATOMIC);
+
+ write_unlock_bh(&bond->lock);
+}
+
+/*
+ * Change the MTU of all of a master's slaves to match the master
+ */
+static int bond_change_mtu(struct net_device *bond_dev, int new_mtu)
+{
+ struct bonding *bond = bond_dev->priv;
+ struct slave *slave, *stop_at;
+ int res = 0;
+ int i;
+
+ dprintk("bond=%p, name=%s, new_mtu=%d\n", bond,
+ (bond_dev ? bond_dev->name : "None"), new_mtu);
+
+ /* Can't hold bond->lock with bh disabled here since
+ * some base drivers panic. On the other hand we can't
+ * hold bond->lock without bh disabled because we'll
+ * deadlock. The only solution is to rely on the fact
+ * that we're under rtnl_lock here, and the slaves
+ * list won't change. This doesn't solve the problem
+ * of setting the slave's MTU while it is
+ * transmitting, but the assumption is that the base
+ * driver can handle that.
+ *
+ * TODO: figure out a way to safely iterate the slaves
+ * list, but without holding a lock around the actual
+ * call to the base driver.
+ */
+
+ bond_for_each_slave(bond, slave, i) {
+ dprintk("s %p s->p %p c_m %p\n", slave,
+ slave->prev, slave->dev->change_mtu);
+ res = dev_set_mtu(slave->dev, new_mtu);
+
+ if (res) {
+ /* If we failed to set the slave's mtu to the new value
+ * we must abort the operation even in ACTIVE_BACKUP
+ * mode, because if we allow the backup slaves to have
+ * different mtu values than the active slave we'll
+ * need to change their mtu when doing a failover. That
+ * means changing their mtu from timer context, which
+ * is probably not a good idea.
+ */
+ dprintk("err %d %s\n", res, slave->dev->name);
+ goto unwind;
+ }
+ }
+
+ bond_dev->mtu = new_mtu;
+
+ return 0;
+
+unwind:
+ /* unwind from head to the slave that failed */
+ stop_at = slave;
+ bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) {
+ int tmp_res;
+
+ tmp_res = dev_set_mtu(slave->dev, bond_dev->mtu);
+ if (tmp_res) {
+ dprintk("unwind err %d dev %s\n", tmp_res,
+ slave->dev->name);
+ }
+ }
+
+ return res;
+}
+
+/*
+ * Change HW address
+ *
+ * Note that many devices must be down to change the HW address, and
+ * downing the master releases all slaves. We can make bonds full of
+ * bonding devices to test this, however.
+ */
+static int bond_set_mac_address(struct net_device *bond_dev, void *addr)
+{
+ struct bonding *bond = bond_dev->priv;
+ struct sockaddr *sa = addr, tmp_sa;
+ struct slave *slave, *stop_at;
+ int res = 0;
+ int i;
+
+ dprintk("bond=%p, name=%s\n", bond, (bond_dev ? bond_dev->name : "None"));
+
+ if (!is_valid_ether_addr(sa->sa_data)) {
+ return -EADDRNOTAVAIL;
+ }
+
+ /* Can't hold bond->lock with bh disabled here since
+ * some base drivers panic. On the other hand we can't
+ * hold bond->lock without bh disabled because we'll
+ * deadlock. The only solution is to rely on the fact
+ * that we're under rtnl_lock here, and the slaves
+ * list won't change. This doesn't solve the problem
+ * of setting the slave's hw address while it is
+ * transmitting, but the assumption is that the base
+ * driver can handle that.
+ *
+ * TODO: figure out a way to safely iterate the slaves
+ * list, but without holding a lock around the actual
+ * call to the base driver.
+ */
+
+ bond_for_each_slave(bond, slave, i) {
+ dprintk("slave %p %s\n", slave, slave->dev->name);
+
+ if (slave->dev->set_mac_address == NULL) {
+ res = -EOPNOTSUPP;
+ dprintk("EOPNOTSUPP %s\n", slave->dev->name);
+ goto unwind;
+ }
+
+ res = dev_set_mac_address(slave->dev, addr);
+ if (res) {
+ /* TODO: consider downing the slave
+ * and retry ?
+ * User should expect communications
+ * breakage anyway until ARP finish
+ * updating, so...
+ */
+ dprintk("err %d %s\n", res, slave->dev->name);
+ goto unwind;
+ }
+ }
+
+ /* success */
+ memcpy(bond_dev->dev_addr, sa->sa_data, bond_dev->addr_len);
+ return 0;
+
+unwind:
+ memcpy(tmp_sa.sa_data, bond_dev->dev_addr, bond_dev->addr_len);
+ tmp_sa.sa_family = bond_dev->type;
+
+ /* unwind from head to the slave that failed */
+ stop_at = slave;
+ bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) {
+ int tmp_res;
+
+ tmp_res = dev_set_mac_address(slave->dev, &tmp_sa);
+ if (tmp_res) {
+ dprintk("unwind err %d dev %s\n", tmp_res,
+ slave->dev->name);
+ }
+ }
+
+ return res;
+}
+
+static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *bond_dev)
+{
+ struct bonding *bond = bond_dev->priv;
+ struct slave *slave, *start_at;
+ int i;
+ int res = 1;
+
+ read_lock(&bond->lock);
+
+ if (!BOND_IS_OK(bond)) {
+ goto out;
+ }
+
+ read_lock(&bond->curr_slave_lock);
+ slave = start_at = bond->curr_active_slave;
+ read_unlock(&bond->curr_slave_lock);
+
+ if (!slave) {
+ goto out;
+ }
+
+ bond_for_each_slave_from(bond, slave, i, start_at) {
+ if (IS_UP(slave->dev) &&
+ (slave->link == BOND_LINK_UP) &&
+ (slave->state == BOND_STATE_ACTIVE)) {
+ res = bond_dev_queue_xmit(bond, skb, slave->dev);
+
+ write_lock(&bond->curr_slave_lock);
+ bond->curr_active_slave = slave->next;
+ write_unlock(&bond->curr_slave_lock);
+
+ break;
+ }
+ }
+
+
+out:
+ if (res) {
+ /* no suitable interface, frame not sent */
+ dev_kfree_skb(skb);
+ }
+ read_unlock(&bond->lock);
+ return 0;
+}
+
+/*
+ * in active-backup mode, we know that bond->curr_active_slave is always valid if
+ * the bond has a usable interface.
+ */
+static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *bond_dev)
+{
+ struct bonding *bond = bond_dev->priv;
+ int res = 1;
+
+ /* if we are sending arp packets, try to at least
+ identify our own ip address */
+ if (bond->params.arp_interval && !my_ip &&
+ (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);
+ }
+
+ read_lock(&bond->lock);
+ read_lock(&bond->curr_slave_lock);
+
+ if (!BOND_IS_OK(bond)) {
+ goto out;
+ }
+
+ if (bond->curr_active_slave) { /* one usable interface */
+ res = bond_dev_queue_xmit(bond, skb, bond->curr_active_slave->dev);
+ }
+
+out:
+ if (res) {
+ /* no suitable interface, frame not sent */
+ dev_kfree_skb(skb);
+ }
+ read_unlock(&bond->curr_slave_lock);
+ read_unlock(&bond->lock);
+ return 0;
+}
+
+/*
+ * 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 *bond_dev)
+{
+ struct bonding *bond = bond_dev->priv;
+ struct ethhdr *data = (struct ethhdr *)skb->data;
+ struct slave *slave, *start_at;
+ int slave_no;
+ int i;
+ int res = 1;
+
+ read_lock(&bond->lock);
+
+ if (!BOND_IS_OK(bond)) {
+ goto out;
+ }
+
+ slave_no = (data->h_dest[5]^bond_dev->dev_addr[5]) % bond->slave_cnt;
+
+ bond_for_each_slave(bond, slave, i) {
+ slave_no--;
+ if (slave_no < 0) {
+ break;
+ }
+ }
+
+ start_at = slave;
+
+ bond_for_each_slave_from(bond, slave, i, start_at) {
+ if (IS_UP(slave->dev) &&
+ (slave->link == BOND_LINK_UP) &&
+ (slave->state == BOND_STATE_ACTIVE)) {
+ res = bond_dev_queue_xmit(bond, skb, slave->dev);
+ break;
+ }
+ }
+
+out:
+ if (res) {
+ /* no suitable interface, frame not sent */
+ dev_kfree_skb(skb);
+ }
+ read_unlock(&bond->lock);
+ return 0;
+}
+
+/*
+ * in broadcast mode, we send everything to all usable interfaces.
+ */
+static int bond_xmit_broadcast(struct sk_buff *skb, struct net_device *bond_dev)
+{
+ struct bonding *bond = bond_dev->priv;
+ struct slave *slave, *start_at;
+ struct net_device *tx_dev = NULL;
+ int i;
+ int res = 1;
+
+ read_lock(&bond->lock);
+
+ if (!BOND_IS_OK(bond)) {
+ goto out;
+ }
+
+ read_lock(&bond->curr_slave_lock);
+ start_at = bond->curr_active_slave;
+ read_unlock(&bond->curr_slave_lock);
+
+ if (!start_at) {
+ goto out;
+ }
+
+ bond_for_each_slave_from(bond, slave, i, start_at) {
+ if (IS_UP(slave->dev) &&
+ (slave->link == BOND_LINK_UP) &&
+ (slave->state == BOND_STATE_ACTIVE)) {
+ if (tx_dev) {
+ struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC);
+ if (!skb2) {
+ printk(KERN_ERR DRV_NAME
+ ": Error: bond_xmit_broadcast(): "
+ "skb_clone() failed\n");
+ continue;
+ }
+
+ res = bond_dev_queue_xmit(bond, skb2, tx_dev);
+ if (res) {
+ dev_kfree_skb(skb2);
+ continue;
+ }
+ }
+ tx_dev = slave->dev;
+ }
+ }
+
+ if (tx_dev) {
+ res = bond_dev_queue_xmit(bond, skb, tx_dev);
+ }
+
+out:
+ if (res) {
+ /* no suitable interface, frame not sent */
+ dev_kfree_skb(skb);
+ }
+ /* frame sent to all suitable interfaces */
+ read_unlock(&bond->lock);
+ return 0;
+}
+
+/*------------------------- Device initialization ---------------------------*/
+
+/*
+ * set bond mode specific net device operations
+ */
+static inline void bond_set_mode_ops(struct net_device *bond_dev, int mode)
+{
+ switch (mode) {
+ case BOND_MODE_ROUNDROBIN:
+ bond_dev->hard_start_xmit = bond_xmit_roundrobin;
+ break;
+ case BOND_MODE_ACTIVEBACKUP:
+ bond_dev->hard_start_xmit = bond_xmit_activebackup;
+ break;
+ case BOND_MODE_XOR:
+ bond_dev->hard_start_xmit = bond_xmit_xor;
+ break;
+ case BOND_MODE_BROADCAST:
+ bond_dev->hard_start_xmit = bond_xmit_broadcast;
+ break;
+ case BOND_MODE_8023AD:
+ bond_dev->hard_start_xmit = bond_3ad_xmit_xor;
+ break;
+ case BOND_MODE_TLB:
+ case BOND_MODE_ALB:
+ bond_dev->hard_start_xmit = bond_alb_xmit;
+ bond_dev->set_mac_address = bond_alb_set_mac_address;
+ break;
+ default:
+ /* Should never happen, mode already checked */
+ printk(KERN_ERR DRV_NAME
+ ": Error: Unknown bonding mode %d\n",
+ mode);
+ break;
+ }
+}
+
+/*
+ * Does not allocate but creates a /proc entry.
+ * Allowed to fail.
+ */
+static int __init bond_init(struct net_device *bond_dev, struct bond_params *params)
+{
+ struct bonding *bond = bond_dev->priv;
+
+ dprintk("Begin bond_init for %s\n", bond_dev->name);
+
+ /* initialize rwlocks */
+ rwlock_init(&bond->lock);
+ rwlock_init(&bond->curr_slave_lock);
+
+ bond->params = *params; /* copy params struct */
+
+ /* Initialize pointers */
+ bond->first_slave = NULL;
+ bond->curr_active_slave = NULL;
+ bond->current_arp_slave = NULL;
+ bond->primary_slave = NULL;
+ bond->dev = bond_dev;
+ INIT_LIST_HEAD(&bond->vlan_list);
+
+ /* Initialize the device entry points */
+ bond_dev->open = bond_open;
+ bond_dev->stop = bond_close;
+ bond_dev->get_stats = bond_get_stats;
+ bond_dev->do_ioctl = bond_do_ioctl;
+ bond_dev->set_multicast_list = bond_set_multicast_list;
+ bond_dev->change_mtu = bond_change_mtu;
+ bond_dev->set_mac_address = bond_set_mac_address;
+
+ bond_set_mode_ops(bond_dev, bond->params.mode);
+
+ bond_dev->destructor = free_netdev;
+
+ /* Initialize the device options */
+ bond_dev->tx_queue_len = 0;
+ bond_dev->flags |= IFF_MASTER|IFF_MULTICAST;
+
+ /* At first, we block adding VLANs. That's the only way to
+ * prevent problems that occur when adding VLANs over an
+ * empty bond. The block will be removed once non-challenged
+ * slaves are enslaved.
+ */
+ bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
+
+ /* don't acquire bond device's xmit_lock when
+ * transmitting */
+ bond_dev->features |= NETIF_F_LLTX;
+
+ /* By default, we declare the bond to be fully
+ * VLAN hardware accelerated capable. Special
+ * care is taken in the various xmit functions
+ * when there are slaves that are not hw accel
+ * capable
+ */
+ bond_dev->vlan_rx_register = bond_vlan_rx_register;
+ bond_dev->vlan_rx_add_vid = bond_vlan_rx_add_vid;
+ bond_dev->vlan_rx_kill_vid = bond_vlan_rx_kill_vid;
+ bond_dev->features |= (NETIF_F_HW_VLAN_TX |
+ NETIF_F_HW_VLAN_RX |
+ NETIF_F_HW_VLAN_FILTER);
+
+#ifdef CONFIG_PROC_FS
+ bond_create_proc_entry(bond);
+#endif
+
+ list_add_tail(&bond->bond_list, &bond_dev_list);
+
+ return 0;
+}
+
+/* De-initialize device specific data.
+ * Caller must hold rtnl_lock.
+ */
+static inline void bond_deinit(struct net_device *bond_dev)
+{
+ struct bonding *bond = bond_dev->priv;
+
+ list_del(&bond->bond_list);
+
+#ifdef CONFIG_PROC_FS
+ bond_remove_proc_entry(bond);
+#endif
+}
+
+/* Unregister and free all bond devices.
+ * Caller must hold rtnl_lock.
+ */
+static void bond_free_all(void)
+{
+ struct bonding *bond, *nxt;
+
+ list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list) {
+ struct net_device *bond_dev = bond->dev;
+
+ unregister_netdevice(bond_dev);
+ bond_deinit(bond_dev);
+ }
+
+#ifdef CONFIG_PROC_FS
+ bond_destroy_proc_dir();
+#endif
+}
+
+/*------------------------- Module initialization ---------------------------*/
+
+/*
+ * Convert string input module parms. Accept either the
+ * number of the mode or its string name.
+ */
+static inline int bond_parse_parm(char *mode_arg, struct bond_parm_tbl *tbl)
+{
+ int i;
+
+ for (i = 0; tbl[i].modename; i++) {
+ if ((isdigit(*mode_arg) &&
+ tbl[i].mode == simple_strtol(mode_arg, NULL, 0)) ||
+ (strncmp(mode_arg, tbl[i].modename,
+ strlen(tbl[i].modename)) == 0)) {
+ return tbl[i].mode;
+ }
+ }
+
+ return -1;
+}
+
+static int bond_check_params(struct bond_params *params)
+{
+ /*
+ * Convert string parameters.
+ */
+ if (mode) {
+ bond_mode = bond_parse_parm(mode, bond_mode_tbl);
+ if (bond_mode == -1) {
+ printk(KERN_ERR DRV_NAME
+ ": Error: Invalid bonding mode \"%s\"\n",
+ mode == NULL ? "NULL" : mode);
+ return -EINVAL;
+ }
+ }
+
+ if (lacp_rate) {
+ if (bond_mode != BOND_MODE_8023AD) {
+ printk(KERN_INFO DRV_NAME
+ ": lacp_rate param is irrelevant in mode %s\n",
+ bond_mode_name(bond_mode));
+ } else {
+ lacp_fast = bond_parse_parm(lacp_rate, bond_lacp_tbl);
+ if (lacp_fast == -1) {
+ printk(KERN_ERR DRV_NAME
+ ": Error: Invalid lacp rate \"%s\"\n",
+ lacp_rate == NULL ? "NULL" : lacp_rate);
+ return -EINVAL;
+ }
+ }
+ }
+
+ if (max_bonds < 1 || max_bonds > INT_MAX) {
+ printk(KERN_WARNING DRV_NAME
+ ": Warning: max_bonds (%d) not in range %d-%d, so it "
+ "was reset to BOND_DEFAULT_MAX_BONDS (%d)",
+ max_bonds, 1, INT_MAX, BOND_DEFAULT_MAX_BONDS);
+ max_bonds = BOND_DEFAULT_MAX_BONDS;
+ }
+
+ if (miimon < 0) {
+ printk(KERN_WARNING DRV_NAME
+ ": Warning: miimon module parameter (%d), "
+ "not in range 0-%d, so it was reset to %d\n",
+ miimon, INT_MAX, BOND_LINK_MON_INTERV);
+ miimon = BOND_LINK_MON_INTERV;
+ }
+
+ if (updelay < 0) {
+ printk(KERN_WARNING DRV_NAME
+ ": Warning: updelay module parameter (%d), "
+ "not in range 0-%d, so it was reset to 0\n",
+ updelay, INT_MAX);
+ updelay = 0;
+ }
+
+ if (downdelay < 0) {
+ printk(KERN_WARNING DRV_NAME
+ ": Warning: downdelay module parameter (%d), "
+ "not in range 0-%d, so it was reset to 0\n",
+ downdelay, INT_MAX);
+ downdelay = 0;
+ }
+
+ if ((use_carrier != 0) && (use_carrier != 1)) {
+ printk(KERN_WARNING DRV_NAME
+ ": Warning: use_carrier module parameter (%d), "
+ "not of valid value (0/1), so it was set to 1\n",
+ use_carrier);
+ use_carrier = 1;
+ }
+
+ /* reset values for 802.3ad */
+ if (bond_mode == BOND_MODE_8023AD) {
+ if (!miimon) {
+ printk(KERN_WARNING DRV_NAME
+ ": Warning: miimon must be specified, "
+ "otherwise bonding will not detect link "
+ "failure, speed and duplex which are "
+ "essential for 802.3ad operation\n");
+ printk(KERN_WARNING "Forcing miimon to 100msec\n");
+ miimon = 100;
+ }
+ }
+
+ /* reset values for TLB/ALB */
+ if ((bond_mode == BOND_MODE_TLB) ||
+ (bond_mode == BOND_MODE_ALB)) {
+ if (!miimon) {
+ printk(KERN_WARNING DRV_NAME
+ ": Warning: miimon must be specified, "
+ "otherwise bonding will not detect link "
+ "failure and link speed which are essential "
+ "for TLB/ALB load balancing\n");
+ printk(KERN_WARNING "Forcing miimon to 100msec\n");
+ miimon = 100;
+ }
+ }
+
+ if (bond_mode == BOND_MODE_ALB) {
+ printk(KERN_NOTICE DRV_NAME
+ ": In ALB mode you might experience client "
+ "disconnections upon reconnection of a link if the "
+ "bonding module updelay parameter (%d msec) is "
+ "incompatible with the forwarding delay time of the "
+ "switch\n",
+ updelay);
+ }
+
+ if (!miimon) {
+ if (updelay || downdelay) {
+ /* just warn the user the up/down delay will have
+ * no effect since miimon is zero...
+ */
+ printk(KERN_WARNING DRV_NAME
+ ": Warning: miimon module parameter not set "
+ "and updelay (%d) or downdelay (%d) module "
+ "parameter is set; updelay and downdelay have "
+ "no effect unless miimon is set\n",
+ updelay, downdelay);
+ }
+ } else {
+ /* don't allow arp monitoring */
+ if (arp_interval) {
+ printk(KERN_WARNING DRV_NAME
+ ": Warning: miimon (%d) and arp_interval (%d) "
+ "can't be used simultaneously, disabling ARP "
+ "monitoring\n",
+ miimon, arp_interval);
+ arp_interval = 0;
+ }
+
+ if ((updelay % miimon) != 0) {
+ printk(KERN_WARNING DRV_NAME
+ ": Warning: updelay (%d) is not a multiple "
+ "of miimon (%d), updelay rounded to %d ms\n",
+ updelay, miimon, (updelay / miimon) * miimon);
+ }
+
+ updelay /= miimon;
+
+ if ((downdelay % miimon) != 0) {
+ printk(KERN_WARNING DRV_NAME
+ ": Warning: downdelay (%d) is not a multiple "
+ "of miimon (%d), downdelay rounded to %d ms\n",
+ downdelay, miimon,
+ (downdelay / miimon) * miimon);
+ }
+
+ downdelay /= miimon;
+ }
+
+ if (arp_interval < 0) {
+ printk(KERN_WARNING DRV_NAME
+ ": Warning: arp_interval module parameter (%d) "
+ ", not in range 0-%d, so it was reset to %d\n",
+ arp_interval, INT_MAX, BOND_LINK_ARP_INTERV);
+ arp_interval = BOND_LINK_ARP_INTERV;
+ }
+
+ for (arp_ip_count = 0;
+ (arp_ip_count < BOND_MAX_ARP_TARGETS) && arp_ip_target[arp_ip_count];
+ arp_ip_count++) {
+ /* not complete check, but should be good enough to
+ catch mistakes */
+ if (!isdigit(arp_ip_target[arp_ip_count][0])) {
+ printk(KERN_WARNING DRV_NAME
+ ": Warning: bad arp_ip_target module parameter "
+ "(%s), ARP monitoring will not be performed\n",
+ arp_ip_target[arp_ip_count]);
+ arp_interval = 0;
+ } else {
+ u32 ip = in_aton(arp_ip_target[arp_ip_count]);
+ arp_target[arp_ip_count] = ip;
+ }
+ }
+
+ if (arp_interval && !arp_ip_count) {
+ /* don't allow arping if no arp_ip_target given... */
+ printk(KERN_WARNING DRV_NAME
+ ": Warning: arp_interval module parameter (%d) "
+ "specified without providing an arp_ip_target "
+ "parameter, arp_interval was reset to 0\n",
+ arp_interval);
+ arp_interval = 0;
+ }
+
+ if (miimon) {
+ printk(KERN_INFO DRV_NAME
+ ": MII link monitoring set to %d ms\n",
+ miimon);
+ } else if (arp_interval) {
+ int i;
+
+ printk(KERN_INFO DRV_NAME
+ ": ARP monitoring set to %d ms with %d target(s):",
+ arp_interval, arp_ip_count);
+
+ for (i = 0; i < arp_ip_count; i++)
+ printk (" %s", arp_ip_target[i]);
+
+ printk("\n");
+
+ } else {
+ /* miimon and arp_interval not set, we need one so things
+ * work as expected, see bonding.txt for details
+ */
+ printk(KERN_WARNING DRV_NAME
+ ": Warning: either miimon or arp_interval and "
+ "arp_ip_target module parameters must be specified, "
+ "otherwise bonding will not detect link failures! see "
+ "bonding.txt for details.\n");
+ }
+
+ if (primary && !USES_PRIMARY(bond_mode)) {
+ /* currently, using a primary only makes sense
+ * in active backup, TLB or ALB modes
+ */
+ printk(KERN_WARNING DRV_NAME
+ ": Warning: %s primary device specified but has no "
+ "effect in %s mode\n",
+ primary, bond_mode_name(bond_mode));
+ primary = NULL;
+ }
+
+ /* fill params struct with the proper values */
+ params->mode = bond_mode;
+ params->miimon = miimon;
+ params->arp_interval = arp_interval;
+ params->updelay = updelay;
+ params->downdelay = downdelay;
+ params->use_carrier = use_carrier;
+ params->lacp_fast = lacp_fast;
+ params->primary[0] = 0;
+
+ if (primary) {
+ strncpy(params->primary, primary, IFNAMSIZ);
+ params->primary[IFNAMSIZ - 1] = 0;
+ }
+
+ memcpy(params->arp_targets, arp_target, sizeof(arp_target));
+
+ return 0;
+}
+
+static int __init bonding_init(void)
+{
+ struct bond_params params;
+ int i;
+ int res;
+
+ printk(KERN_INFO "%s", version);
+
+ res = bond_check_params(¶ms);
+ if (res) {
+ return res;
+ }
+
+ rtnl_lock();
+
+#ifdef CONFIG_PROC_FS
+ bond_create_proc_dir();
+#endif
+
+ for (i = 0; i < max_bonds; i++) {
+ struct net_device *bond_dev;
+
+ bond_dev = alloc_netdev(sizeof(struct bonding), "", ether_setup);
+ if (!bond_dev) {
+ res = -ENOMEM;
+ goto out_err;
+ }
+
+ res = dev_alloc_name(bond_dev, "bond%d");
+ if (res < 0) {
+ free_netdev(bond_dev);
+ goto out_err;
+ }
+
+ /* bond_init() must be called after dev_alloc_name() (for the
+ * /proc files), but before register_netdevice(), because we
+ * need to set function pointers.
+ */
+ res = bond_init(bond_dev, ¶ms);
+ if (res < 0) {
+ free_netdev(bond_dev);
+ goto out_err;
+ }
+
+ SET_MODULE_OWNER(bond_dev);
+
+ res = register_netdevice(bond_dev);
+ if (res < 0) {
+ bond_deinit(bond_dev);
+ free_netdev(bond_dev);
+ goto out_err;
+ }
+ }
+
+ rtnl_unlock();
+ register_netdevice_notifier(&bond_netdev_notifier);
+
+ return 0;
+
+out_err:
+ /* free and unregister all bonds that were successfully added */
+ bond_free_all();
+
+ rtnl_unlock();
+
+ return res;
+}
+
+static void __exit bonding_exit(void)
+{
+ unregister_netdevice_notifier(&bond_netdev_notifier);
+
+ rtnl_lock();
+ bond_free_all();
+ rtnl_unlock();
+}
+
+module_init(bonding_init);
+module_exit(bonding_exit);
+MODULE_LICENSE("GPL");
+MODULE_VERSION(DRV_VERSION);
+MODULE_DESCRIPTION(DRV_DESCRIPTION ", v" DRV_VERSION);
+MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others");
+MODULE_SUPPORTED_DEVICE("most ethernet devices");
+
+/*
+ * Local variables:
+ * c-indent-level: 8
+ * c-basic-offset: 8
+ * tab-width: 8
+ * End:
+ */
+