mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-26 14:30:55 +07:00
df49898a47
Expand comment explaining MAC address selection for replicated IGMP frames transmitted in bonding mode 1 (active-backup). Also, a small whitespace cleanup. Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
4997 lines
140 KiB
C
4997 lines
140 KiB
C
/*
|
|
* 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.
|
|
* 2005/06/05 - Jay Vosburgh <fubar@us.ibm.com>
|
|
* - Support for generating gratuitous ARPs in active-backup mode.
|
|
* Includes support for VLAN tagging all bonding-generated ARPs
|
|
* as needed. Set version to 2.6.2.
|
|
* 2005/06/08 - Jason Gabler <jygabler at lbl dot gov>
|
|
* - alternate hashing policy support for mode 2
|
|
* * Added kernel parameter "xmit_hash_policy" to allow the selection
|
|
* of different hashing policies for mode 2. The original mode 2
|
|
* policy is the default, now found in xmit_hash_policy_layer2().
|
|
* * Added xmit_hash_policy_layer34()
|
|
* - Modified by Jay Vosburgh <fubar@us.ibm.com> to also support mode 4.
|
|
* Set version to 2.6.3.
|
|
* 2005/09/26 - Jay Vosburgh <fubar@us.ibm.com>
|
|
* - Removed backwards compatibility for old ifenslaves. Version 2.6.4.
|
|
*/
|
|
|
|
//#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 <net/ip.h>
|
|
#include <linux/ip.h>
|
|
#include <linux/tcp.h>
|
|
#include <linux/udp.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 <net/route.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 char *xmit_hash_policy = 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(xmit_hash_policy, charp, 0);
|
|
MODULE_PARM_DESC(xmit_hash_policy, "XOR hashing method : 0 for layer 2 (default), 1 for layer 3+4");
|
|
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 int bond_mode = BOND_MODE_ROUNDROBIN;
|
|
static int xmit_hashtype= BOND_XMIT_POLICY_LAYER2;
|
|
static int lacp_fast = 0;
|
|
|
|
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},
|
|
};
|
|
|
|
static struct bond_parm_tbl xmit_hashtype_tbl[] = {
|
|
{ "layer2", BOND_XMIT_POLICY_LAYER2},
|
|
{ "layer3+4", BOND_XMIT_POLICY_LAYER34},
|
|
{ NULL, -1},
|
|
};
|
|
|
|
/*-------------------------- Forward declarations ---------------------------*/
|
|
|
|
static inline void bond_set_mode_ops(struct bonding *bond, int mode);
|
|
static void bond_send_gratuitous_arp(struct bonding *bond);
|
|
|
|
/*---------------------------- 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;
|
|
vlan->vlan_ip = 0;
|
|
|
|
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,
|
|
gfp_t gfp_flag)
|
|
{
|
|
struct dev_mc_list *dmi, *new_dmi;
|
|
|
|
for (dmi = mc_list; dmi; dmi = dmi->next) {
|
|
new_dmi = kmalloc(sizeof(struct dev_mc_list), gfp_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 (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;
|
|
}
|
|
|
|
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);
|
|
}
|
|
bond_send_gratuitous_arp(bond);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 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;
|
|
}
|
|
|
|
#define BOND_INTERSECT_FEATURES \
|
|
(NETIF_F_SG|NETIF_F_IP_CSUM|NETIF_F_NO_CSUM|NETIF_F_HW_CSUM)
|
|
|
|
/*
|
|
* Compute the features available to the bonding device by
|
|
* intersection of all of the slave devices' BOND_INTERSECT_FEATURES.
|
|
* Call this after attaching or detaching a slave to update the
|
|
* bond's features.
|
|
*/
|
|
static int bond_compute_features(struct bonding *bond)
|
|
{
|
|
int i;
|
|
struct slave *slave;
|
|
struct net_device *bond_dev = bond->dev;
|
|
int features = bond->bond_features;
|
|
|
|
bond_for_each_slave(bond, slave, i) {
|
|
struct net_device * slave_dev = slave->dev;
|
|
if (i == 0) {
|
|
features |= BOND_INTERSECT_FEATURES;
|
|
}
|
|
features &=
|
|
~(~slave_dev->features & BOND_INTERSECT_FEATURES);
|
|
}
|
|
|
|
/* turn off NETIF_F_SG if we need a csum and h/w can't do it */
|
|
if ((features & NETIF_F_SG) &&
|
|
!(features & (NETIF_F_IP_CSUM |
|
|
NETIF_F_NO_CSUM |
|
|
NETIF_F_HW_CSUM))) {
|
|
features &= ~NETIF_F_SG;
|
|
}
|
|
|
|
bond_dev->features = features;
|
|
|
|
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 (!bond->params.use_carrier && slave_dev->ethtool_ops == NULL &&
|
|
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;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Old ifenslave binaries are no longer supported. These can
|
|
* be identified with moderate accurary by the state of the slave:
|
|
* the current ifenslave will set the interface down prior to
|
|
* enslaving it; the old ifenslave will not.
|
|
*/
|
|
if ((slave_dev->flags & IFF_UP)) {
|
|
printk(KERN_ERR DRV_NAME ": %s is up. "
|
|
"This may be due to an out of date ifenslave.\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;
|
|
}
|
|
|
|
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;
|
|
|
|
/*
|
|
* Save slave's original ("permanent") mac address for modes
|
|
* that need 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);
|
|
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;
|
|
|
|
bond_compute_features(bond);
|
|
|
|
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);
|
|
|
|
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);
|
|
|
|
bond_compute_features(bond);
|
|
|
|
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);
|
|
|
|
/* 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);
|
|
}
|
|
|
|
bond_compute_features(bond);
|
|
|
|
/* 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);
|
|
|
|
/* 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_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 u32 bond_glean_dev_ip(struct net_device *dev)
|
|
{
|
|
struct in_device *idev;
|
|
struct in_ifaddr *ifa;
|
|
u32 addr = 0;
|
|
|
|
if (!dev)
|
|
return 0;
|
|
|
|
rcu_read_lock();
|
|
idev = __in_dev_get_rcu(dev);
|
|
if (!idev)
|
|
goto out;
|
|
|
|
ifa = idev->ifa_list;
|
|
if (!ifa)
|
|
goto out;
|
|
|
|
addr = ifa->ifa_local;
|
|
out:
|
|
rcu_read_unlock();
|
|
return addr;
|
|
}
|
|
|
|
static int bond_has_ip(struct bonding *bond)
|
|
{
|
|
struct vlan_entry *vlan, *vlan_next;
|
|
|
|
if (bond->master_ip)
|
|
return 1;
|
|
|
|
if (list_empty(&bond->vlan_list))
|
|
return 0;
|
|
|
|
list_for_each_entry_safe(vlan, vlan_next, &bond->vlan_list,
|
|
vlan_list) {
|
|
if (vlan->vlan_ip)
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* We go to the (large) trouble of VLAN tagging ARP frames because
|
|
* switches in VLAN mode (especially if ports are configured as
|
|
* "native" to a VLAN) might not pass non-tagged frames.
|
|
*/
|
|
static void bond_arp_send(struct net_device *slave_dev, int arp_op, u32 dest_ip, u32 src_ip, unsigned short vlan_id)
|
|
{
|
|
struct sk_buff *skb;
|
|
|
|
dprintk("arp %d on slave %s: dst %x src %x vid %d\n", arp_op,
|
|
slave_dev->name, dest_ip, src_ip, vlan_id);
|
|
|
|
skb = arp_create(arp_op, ETH_P_ARP, dest_ip, slave_dev, src_ip,
|
|
NULL, slave_dev->dev_addr, NULL);
|
|
|
|
if (!skb) {
|
|
printk(KERN_ERR DRV_NAME ": ARP packet allocation failed\n");
|
|
return;
|
|
}
|
|
if (vlan_id) {
|
|
skb = vlan_put_tag(skb, vlan_id);
|
|
if (!skb) {
|
|
printk(KERN_ERR DRV_NAME ": failed to insert VLAN tag\n");
|
|
return;
|
|
}
|
|
}
|
|
arp_xmit(skb);
|
|
}
|
|
|
|
|
|
static void bond_arp_send_all(struct bonding *bond, struct slave *slave)
|
|
{
|
|
int i, vlan_id, rv;
|
|
u32 *targets = bond->params.arp_targets;
|
|
struct vlan_entry *vlan, *vlan_next;
|
|
struct net_device *vlan_dev;
|
|
struct flowi fl;
|
|
struct rtable *rt;
|
|
|
|
for (i = 0; (i < BOND_MAX_ARP_TARGETS) && targets[i]; i++) {
|
|
dprintk("basa: target %x\n", targets[i]);
|
|
if (list_empty(&bond->vlan_list)) {
|
|
dprintk("basa: empty vlan: arp_send\n");
|
|
bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
|
|
bond->master_ip, 0);
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* If VLANs are configured, we do a route lookup to
|
|
* determine which VLAN interface would be used, so we
|
|
* can tag the ARP with the proper VLAN tag.
|
|
*/
|
|
memset(&fl, 0, sizeof(fl));
|
|
fl.fl4_dst = targets[i];
|
|
fl.fl4_tos = RTO_ONLINK;
|
|
|
|
rv = ip_route_output_key(&rt, &fl);
|
|
if (rv) {
|
|
if (net_ratelimit()) {
|
|
printk(KERN_WARNING DRV_NAME
|
|
": %s: no route to arp_ip_target %u.%u.%u.%u\n",
|
|
bond->dev->name, NIPQUAD(fl.fl4_dst));
|
|
}
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* This target is not on a VLAN
|
|
*/
|
|
if (rt->u.dst.dev == bond->dev) {
|
|
ip_rt_put(rt);
|
|
dprintk("basa: rtdev == bond->dev: arp_send\n");
|
|
bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
|
|
bond->master_ip, 0);
|
|
continue;
|
|
}
|
|
|
|
vlan_id = 0;
|
|
list_for_each_entry_safe(vlan, vlan_next, &bond->vlan_list,
|
|
vlan_list) {
|
|
vlan_dev = bond->vlgrp->vlan_devices[vlan->vlan_id];
|
|
if (vlan_dev == rt->u.dst.dev) {
|
|
vlan_id = vlan->vlan_id;
|
|
dprintk("basa: vlan match on %s %d\n",
|
|
vlan_dev->name, vlan_id);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (vlan_id) {
|
|
ip_rt_put(rt);
|
|
bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
|
|
vlan->vlan_ip, vlan_id);
|
|
continue;
|
|
}
|
|
|
|
if (net_ratelimit()) {
|
|
printk(KERN_WARNING DRV_NAME
|
|
": %s: no path to arp_ip_target %u.%u.%u.%u via rt.dev %s\n",
|
|
bond->dev->name, NIPQUAD(fl.fl4_dst),
|
|
rt->u.dst.dev ? rt->u.dst.dev->name : "NULL");
|
|
}
|
|
ip_rt_put(rt);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Kick out a gratuitous ARP for an IP on the bonding master plus one
|
|
* for each VLAN above us.
|
|
*/
|
|
static void bond_send_gratuitous_arp(struct bonding *bond)
|
|
{
|
|
struct slave *slave = bond->curr_active_slave;
|
|
struct vlan_entry *vlan;
|
|
struct net_device *vlan_dev;
|
|
|
|
dprintk("bond_send_grat_arp: bond %s slave %s\n", bond->dev->name,
|
|
slave ? slave->dev->name : "NULL");
|
|
if (!slave)
|
|
return;
|
|
|
|
if (bond->master_ip) {
|
|
bond_arp_send(slave->dev, ARPOP_REPLY, bond->master_ip,
|
|
bond->master_ip, 0);
|
|
}
|
|
|
|
list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
|
|
vlan_dev = bond->vlgrp->vlan_devices[vlan->vlan_id];
|
|
if (vlan->vlan_ip) {
|
|
bond_arp_send(slave->dev, ARPOP_REPLY, vlan->vlan_ip,
|
|
vlan->vlan_ip, vlan->vlan_id);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 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)) &&
|
|
bond_has_ip(bond))) {
|
|
|
|
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) &&
|
|
bond_has_ip(bond))) {
|
|
/* 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)) &&
|
|
bond_has_ip(bond))) &&
|
|
((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 && bond_has_ip(bond)) {
|
|
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->next) {
|
|
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);
|
|
|
|
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;
|
|
struct bonding *bond = bond_dev->priv;
|
|
|
|
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;
|
|
case NETDEV_FEAT_CHANGE:
|
|
bond_compute_features(bond);
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* bond_inetaddr_event: handle inetaddr notifier chain events.
|
|
*
|
|
* We keep track of device IPs primarily to use as source addresses in
|
|
* ARP monitor probes (rather than spewing out broadcasts all the time).
|
|
*
|
|
* We track one IP for the main device (if it has one), plus one per VLAN.
|
|
*/
|
|
static int bond_inetaddr_event(struct notifier_block *this, unsigned long event, void *ptr)
|
|
{
|
|
struct in_ifaddr *ifa = ptr;
|
|
struct net_device *vlan_dev, *event_dev = ifa->ifa_dev->dev;
|
|
struct bonding *bond, *bond_next;
|
|
struct vlan_entry *vlan, *vlan_next;
|
|
|
|
list_for_each_entry_safe(bond, bond_next, &bond_dev_list, bond_list) {
|
|
if (bond->dev == event_dev) {
|
|
switch (event) {
|
|
case NETDEV_UP:
|
|
bond->master_ip = ifa->ifa_local;
|
|
return NOTIFY_OK;
|
|
case NETDEV_DOWN:
|
|
bond->master_ip = bond_glean_dev_ip(bond->dev);
|
|
return NOTIFY_OK;
|
|
default:
|
|
return NOTIFY_DONE;
|
|
}
|
|
}
|
|
|
|
if (list_empty(&bond->vlan_list))
|
|
continue;
|
|
|
|
list_for_each_entry_safe(vlan, vlan_next, &bond->vlan_list,
|
|
vlan_list) {
|
|
vlan_dev = bond->vlgrp->vlan_devices[vlan->vlan_id];
|
|
if (vlan_dev == event_dev) {
|
|
switch (event) {
|
|
case NETDEV_UP:
|
|
vlan->vlan_ip = ifa->ifa_local;
|
|
return NOTIFY_OK;
|
|
case NETDEV_DOWN:
|
|
vlan->vlan_ip =
|
|
bond_glean_dev_ip(vlan_dev);
|
|
return NOTIFY_OK;
|
|
default:
|
|
return NOTIFY_DONE;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
static struct notifier_block bond_netdev_notifier = {
|
|
.notifier_call = bond_netdev_event,
|
|
};
|
|
|
|
static struct notifier_block bond_inetaddr_notifier = {
|
|
.notifier_call = bond_inetaddr_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));
|
|
}
|
|
|
|
/*---------------------------- Hashing Policies -----------------------------*/
|
|
|
|
/*
|
|
* Hash for the the output device based upon layer 3 and layer 4 data. If
|
|
* the packet is a frag or not TCP or UDP, just use layer 3 data. If it is
|
|
* altogether not IP, mimic bond_xmit_hash_policy_l2()
|
|
*/
|
|
static int bond_xmit_hash_policy_l34(struct sk_buff *skb,
|
|
struct net_device *bond_dev, int count)
|
|
{
|
|
struct ethhdr *data = (struct ethhdr *)skb->data;
|
|
struct iphdr *iph = skb->nh.iph;
|
|
u16 *layer4hdr = (u16 *)((u32 *)iph + iph->ihl);
|
|
int layer4_xor = 0;
|
|
|
|
if (skb->protocol == __constant_htons(ETH_P_IP)) {
|
|
if (!(iph->frag_off & __constant_htons(IP_MF|IP_OFFSET)) &&
|
|
(iph->protocol == IPPROTO_TCP ||
|
|
iph->protocol == IPPROTO_UDP)) {
|
|
layer4_xor = htons((*layer4hdr ^ *(layer4hdr + 1)));
|
|
}
|
|
return (layer4_xor ^
|
|
((ntohl(iph->saddr ^ iph->daddr)) & 0xffff)) % count;
|
|
|
|
}
|
|
|
|
return (data->h_dest[5] ^ bond_dev->dev_addr[5]) % count;
|
|
}
|
|
|
|
/*
|
|
* Hash for the output device based upon layer 2 data
|
|
*/
|
|
static int bond_xmit_hash_policy_l2(struct sk_buff *skb,
|
|
struct net_device *bond_dev, int count)
|
|
{
|
|
struct ethhdr *data = (struct ethhdr *)skb->data;
|
|
|
|
return (data->h_dest[5] ^ bond_dev->dev_addr[5]) % count;
|
|
}
|
|
|
|
/*-------------------------- 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 res = 0;
|
|
|
|
dprintk("bond_ioctl: master=%s, cmd=%d\n",
|
|
bond_dev->name, cmd);
|
|
|
|
switch (cmd) {
|
|
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;
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
static void bond_activebackup_xmit_copy(struct sk_buff *skb,
|
|
struct bonding *bond,
|
|
struct slave *slave)
|
|
{
|
|
struct sk_buff *skb2 = skb_copy(skb, GFP_ATOMIC);
|
|
struct ethhdr *eth_data;
|
|
u8 *hwaddr;
|
|
int res;
|
|
|
|
if (!skb2) {
|
|
printk(KERN_ERR DRV_NAME ": Error: "
|
|
"bond_activebackup_xmit_copy(): skb_copy() failed\n");
|
|
return;
|
|
}
|
|
|
|
skb2->mac.raw = (unsigned char *)skb2->data;
|
|
eth_data = eth_hdr(skb2);
|
|
|
|
/* Pick an appropriate source MAC address
|
|
* -- use slave's perm MAC addr, unless used by bond
|
|
* -- otherwise, borrow active slave's perm MAC addr
|
|
* since that will not be used
|
|
*/
|
|
hwaddr = slave->perm_hwaddr;
|
|
if (!memcmp(eth_data->h_source, hwaddr, ETH_ALEN))
|
|
hwaddr = bond->curr_active_slave->perm_hwaddr;
|
|
|
|
/* Set source MAC address appropriately */
|
|
memcpy(eth_data->h_source, hwaddr, ETH_ALEN);
|
|
|
|
res = bond_dev_queue_xmit(bond, skb2, slave->dev);
|
|
if (res)
|
|
dev_kfree_skb(skb2);
|
|
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
|
|
read_lock(&bond->lock);
|
|
read_lock(&bond->curr_slave_lock);
|
|
|
|
if (!BOND_IS_OK(bond)) {
|
|
goto out;
|
|
}
|
|
|
|
if (!bond->curr_active_slave)
|
|
goto out;
|
|
|
|
/* Xmit IGMP frames on all slaves to ensure rapid fail-over
|
|
for multicast traffic on snooping switches */
|
|
if (skb->protocol == __constant_htons(ETH_P_IP) &&
|
|
skb->nh.iph->protocol == IPPROTO_IGMP) {
|
|
struct slave *slave, *active_slave;
|
|
int i;
|
|
|
|
active_slave = bond->curr_active_slave;
|
|
bond_for_each_slave_from_to(bond, slave, i, active_slave->next,
|
|
active_slave->prev)
|
|
if (IS_UP(slave->dev) &&
|
|
(slave->link == BOND_LINK_UP))
|
|
bond_activebackup_xmit_copy(skb, bond, slave);
|
|
}
|
|
|
|
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 bond_xmit_xor() , we determine the output device by using a pre-
|
|
* determined xmit_hash_policy(), If the selected device is not enabled,
|
|
* find the next active slave.
|
|
*/
|
|
static int bond_xmit_xor(struct sk_buff *skb, struct net_device *bond_dev)
|
|
{
|
|
struct bonding *bond = bond_dev->priv;
|
|
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 = bond->xmit_hash_policy(skb, bond_dev, 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 bonding *bond, int mode)
|
|
{
|
|
struct net_device *bond_dev = bond->dev;
|
|
|
|
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;
|
|
if (bond->params.xmit_policy == BOND_XMIT_POLICY_LAYER34)
|
|
bond->xmit_hash_policy = bond_xmit_hash_policy_l34;
|
|
else
|
|
bond->xmit_hash_policy = bond_xmit_hash_policy_l2;
|
|
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;
|
|
if (bond->params.xmit_policy == BOND_XMIT_POLICY_LAYER34)
|
|
bond->xmit_hash_policy = bond_xmit_hash_policy_l34;
|
|
else
|
|
bond->xmit_hash_policy = bond_xmit_hash_policy_l2;
|
|
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;
|
|
}
|
|
}
|
|
|
|
static void bond_ethtool_get_drvinfo(struct net_device *bond_dev,
|
|
struct ethtool_drvinfo *drvinfo)
|
|
{
|
|
strncpy(drvinfo->driver, DRV_NAME, 32);
|
|
strncpy(drvinfo->version, DRV_VERSION, 32);
|
|
snprintf(drvinfo->fw_version, 32, "%d", BOND_ABI_VERSION);
|
|
}
|
|
|
|
static struct ethtool_ops bond_ethtool_ops = {
|
|
.get_tx_csum = ethtool_op_get_tx_csum,
|
|
.get_sg = ethtool_op_get_sg,
|
|
.get_drvinfo = bond_ethtool_get_drvinfo,
|
|
};
|
|
|
|
/*
|
|
* 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->ethtool_ops = &bond_ethtool_ops;
|
|
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, 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);
|
|
|
|
bond->bond_features = bond_dev->features;
|
|
|
|
#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 (xmit_hash_policy) {
|
|
if ((bond_mode != BOND_MODE_XOR) &&
|
|
(bond_mode != BOND_MODE_8023AD)) {
|
|
printk(KERN_INFO DRV_NAME
|
|
": xor_mode param is irrelevant in mode %s\n",
|
|
bond_mode_name(bond_mode));
|
|
} else {
|
|
xmit_hashtype = bond_parse_parm(xmit_hash_policy,
|
|
xmit_hashtype_tbl);
|
|
if (xmit_hashtype == -1) {
|
|
printk(KERN_ERR DRV_NAME
|
|
": Error: Invalid xmit_hash_policy \"%s\"\n",
|
|
xmit_hash_policy == NULL ? "NULL" :
|
|
xmit_hash_policy);
|
|
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->xmit_policy = xmit_hashtype;
|
|
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);
|
|
register_inetaddr_notifier(&bond_inetaddr_notifier);
|
|
|
|
return 0;
|
|
|
|
out_err:
|
|
/*
|
|
* rtnl_unlock() will run netdev_run_todo(), putting the
|
|
* thus-far-registered bonding devices into a state which
|
|
* unregigister_netdevice() will accept
|
|
*/
|
|
rtnl_unlock();
|
|
rtnl_lock();
|
|
|
|
/* 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);
|
|
unregister_inetaddr_notifier(&bond_inetaddr_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:
|
|
*/
|
|
|