diff options
Diffstat (limited to 'drivers/net/bonding/bond_main.c')
| -rw-r--r-- | drivers/net/bonding/bond_main.c | 482 |
1 files changed, 0 insertions, 482 deletions
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c index 40ff791..2582d98 100644 --- a/drivers/net/bonding/bond_main.c +++ b/drivers/net/bonding/bond_main.c @@ -29,488 +29,6 @@ * 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. - * 2005/09/27 - Mitch Williams <mitch.a.williams at intel dot com> - * - Radheka Godse <radheka.godse at intel dot com> - * - Split out bond creation code to allow for sysfs interface. - * - Removed static declaration on some functions and data items. - * - Added sysfs support, including capability to add/remove/change - * any bond at runtime. - * - * - Miscellaneous: - * - Added bonding: <bondname>: prefix to sysfs log messages - * - Added arp_ip_targets to /proc entry - * - Allow ARP target table to have empty entries - * - trivial fix: added missing modes description to modinfo - * - Corrected bug in ALB init where kmalloc is called inside - * a held lock - * - Corrected behavior to maintain bond link when changing - * from arp monitor to miimon and vice versa - * - Added missing bonding: <bondname>: prefix to alb, ad log messages - * - Fixed stack dump warnings seen if changing between miimon - * and arp monitoring when the bond interface is down. - * - Fixed stack dump warnings seen when enslaving an e100 - * driver - * - Set version to 3.0.0 */ //#define BONDING_DEBUG 1 |
