| /* |
| * originally based on the dummy device. |
| * |
| * Copyright 1999, Thomas Davis, tadavis@lbl.gov. |
| * Licensed under the GPL. Based on dummy.c, and eql.c devices. |
| * |
| * bonding.c: an Ethernet Bonding driver |
| * |
| * This is useful to talk to a Cisco EtherChannel compatible equipment: |
| * Cisco 5500 |
| * Sun Trunking (Solaris) |
| * Alteon AceDirector Trunks |
| * Linux Bonding |
| * and probably many L2 switches ... |
| * |
| * How it works: |
| * ifconfig bond0 ipaddress netmask up |
| * will setup a network device, with an ip address. No mac address |
| * will be assigned at this time. The hw mac address will come from |
| * the first slave bonded to the channel. All slaves will then use |
| * this hw mac address. |
| * |
| * ifconfig bond0 down |
| * will release all slaves, marking them as down. |
| * |
| * ifenslave bond0 eth0 |
| * will attach eth0 to bond0 as a slave. eth0 hw mac address will either |
| * a: be used as initial mac address |
| * b: if a hw mac address already is there, eth0's hw mac address |
| * will then be set from bond0. |
| * |
| * v0.1 - first working version. |
| * v0.2 - changed stats to be calculated by summing slaves stats. |
| * |
| * Changes: |
| * Arnaldo Carvalho de Melo <acme@conectiva.com.br> |
| * - fix leaks on failure at bond_init |
| * |
| * 2000/09/30 - Willy Tarreau <willy at meta-x.org> |
| * - added trivial code to release a slave device. |
| * - fixed security bug (CAP_NET_ADMIN not checked) |
| * - implemented MII link monitoring to disable dead links : |
| * All MII capable slaves are checked every <miimon> milliseconds |
| * (100 ms seems good). This value can be changed by passing it to |
| * insmod. A value of zero disables the monitoring (default). |
| * - fixed an infinite loop in bond_xmit_roundrobin() when there's no |
| * good slave. |
| * - made the code hopefully SMP safe |
| * |
| * 2000/10/03 - Willy Tarreau <willy at meta-x.org> |
| * - optimized slave lists based on relevant suggestions from Thomas Davis |
| * - implemented active-backup method to obtain HA with two switches: |
| * stay as long as possible on the same active interface, while we |
| * also monitor the backup one (MII link status) because we want to know |
| * if we are able to switch at any time. ( pass "mode=1" to insmod ) |
| * - lots of stress testings because we need it to be more robust than the |
| * wires ! :-> |
| * |
| * 2000/10/09 - Willy Tarreau <willy at meta-x.org> |
| * - added up and down delays after link state change. |
| * - optimized the slaves chaining so that when we run forward, we never |
| * repass through the bond itself, but we can find it by searching |
| * backwards. Renders the deletion more difficult, but accelerates the |
| * scan. |
| * - smarter enslaving and releasing. |
| * - finer and more robust SMP locking |
| * |
| * 2000/10/17 - Willy Tarreau <willy at meta-x.org> |
| * - fixed two potential SMP race conditions |
| * |
| * 2000/10/18 - Willy Tarreau <willy at meta-x.org> |
| * - small fixes to the monitoring FSM in case of zero delays |
| * 2000/11/01 - Willy Tarreau <willy at meta-x.org> |
| * - fixed first slave not automatically used in trunk mode. |
| * 2000/11/10 : spelling of "EtherChannel" corrected. |
| * 2000/11/13 : fixed a race condition in case of concurrent accesses to ioctl(). |
| * 2000/12/16 : fixed improper usage of rtnl_exlock_nowait(). |
| * |
| * 2001/1/3 - Chad N. Tindel <ctindel at ieee dot org> |
| * - The bonding driver now simulates MII status monitoring, just like |
| * a normal network device. It will show that the link is down iff |
| * every slave in the bond shows that their links are down. If at least |
| * one slave is up, the bond's MII status will appear as up. |
| * |
| * 2001/2/7 - Chad N. Tindel <ctindel at ieee dot org> |
| * - Applications can now query the bond from user space to get |
| * information which may be useful. They do this by calling |
| * the BOND_INFO_QUERY ioctl. Once the app knows how many slaves |
| * are in the bond, it can call the BOND_SLAVE_INFO_QUERY ioctl to |
| * get slave specific information (# link failures, etc). See |
| * <linux/if_bonding.h> for more details. The structs of interest |
| * are ifbond and ifslave. |
| * |
| * 2001/4/5 - Chad N. Tindel <ctindel at ieee dot org> |
| * - Ported to 2.4 Kernel |
| * |
| * 2001/5/2 - Jeffrey E. Mast <jeff at mastfamily dot com> |
| * - When a device is detached from a bond, the slave device is no longer |
| * left thinking that is has a master. |
| * |
| * 2001/5/16 - Jeffrey E. Mast <jeff at mastfamily dot com> |
| * - memset did not appropriately initialized the bond rw_locks. Used |
| * rwlock_init to initialize to unlocked state to prevent deadlock when |
| * first attempting a lock |
| * - Called SET_MODULE_OWNER for bond device |
| * |
| * 2001/5/17 - Tim Anderson <tsa at mvista.com> |
| * - 2 paths for releasing for slave release; 1 through ioctl |
| * and 2) through close. Both paths need to release the same way. |
| * - the free slave in bond release is changing slave status before |
| * the free. The netdev_set_master() is intended to change slave state |
| * so it should not be done as part of the release process. |
| * - Simple rule for slave state at release: only the active in A/B and |
| * only one in the trunked case. |
| * |
| * 2001/6/01 - Tim Anderson <tsa at mvista.com> |
| * - Now call dev_close when releasing a slave so it doesn't screw up |
| * out routing table. |
| * |
| * 2001/6/01 - Chad N. Tindel <ctindel at ieee dot org> |
| * - Added /proc support for getting bond and slave information. |
| * Information is in /proc/net/<bond device>/info. |
| * - Changed the locking when calling bond_close to prevent deadlock. |
| * |
| * 2001/8/05 - Janice Girouard <girouard at us.ibm.com> |
| * - correct problem where refcnt of slave is not incremented in bond_ioctl |
| * so the system hangs when halting. |
| * - correct locking problem when unable to malloc in bond_enslave. |
| * - adding bond_xmit_xor logic. |
| * - adding multiple bond device support. |
| * |
| * 2001/8/13 - Erik Habbinga <erik_habbinga at hp dot com> |
| * - correct locking problem with rtnl_exlock_nowait |
| * |
| * 2001/8/23 - Janice Girouard <girouard at us.ibm.com> |
| * - bzero initial dev_bonds, to correct oops |
| * - convert SIOCDEVPRIVATE to new MII ioctl calls |
| * |
| * 2001/9/13 - Takao Indoh <indou dot takao at jp dot fujitsu dot com> |
| * - Add the BOND_CHANGE_ACTIVE ioctl implementation |
| * |
| * 2001/9/14 - Mark Huth <mhuth at mvista dot com> |
| * - Change MII_LINK_READY to not check for end of auto-negotiation, |
| * but only for an up link. |
| * |
| * 2001/9/20 - Chad N. Tindel <ctindel at ieee dot org> |
| * - Add the device field to bonding_t. Previously the net_device |
| * corresponding to a bond wasn't available from the bonding_t |
| * structure. |
| * |
| * 2001/9/25 - Janice Girouard <girouard at us.ibm.com> |
| * - add arp_monitor for active backup mode |
| * |
| * 2001/10/23 - Takao Indoh <indou dot takao at jp dot fujitsu dot com> |
| * - Various memory leak fixes |
| * |
| * 2001/11/5 - Mark Huth <mark dot huth at mvista dot com> |
| * - Don't take rtnl lock in bond_mii_monitor as it deadlocks under |
| * certain hotswap conditions. |
| * Note: this same change may be required in bond_arp_monitor ??? |
| * - Remove possibility of calling bond_sethwaddr with NULL slave_dev ptr |
| * - Handle hot swap ethernet interface deregistration events to remove |
| * kernel oops following hot swap of enslaved interface |
| * |
| * 2002/1/2 - Chad N. Tindel <ctindel at ieee dot org> |
| * - Restore original slave flags at release time. |
| * |
| * 2002/02/18 - Erik Habbinga <erik_habbinga at hp dot com> |
| * - bond_release(): calling kfree on our_slave after call to |
| * bond_restore_slave_flags, not before |
| * - bond_enslave(): saving slave flags into original_flags before |
| * call to netdev_set_master, so the IFF_SLAVE flag doesn't end |
| * up in original_flags |
| * |
| * 2002/04/05 - Mark Smith <mark.smith at comdev dot cc> and |
| * Steve Mead <steve.mead at comdev dot cc> |
| * - Port Gleb Natapov's multicast support patchs from 2.4.12 |
| * to 2.4.18 adding support for multicast. |
| * |
| * 2002/06/10 - Tony Cureington <tony.cureington * hp_com> |
| * - corrected uninitialized pointer (ifr.ifr_data) in bond_check_dev_link; |
| * actually changed function to use MIIPHY, then MIIREG, and finally |
| * ETHTOOL to determine the link status |
| * - fixed bad ifr_data pointer assignments in bond_ioctl |
| * - corrected mode 1 being reported as active-backup in bond_get_info; |
| * also added text to distinguish type of load balancing (rr or xor) |
| * - change arp_ip_target module param from "1-12s" (array of 12 ptrs) |
| * to "s" (a single ptr) |
| * |
| * 2002/08/30 - Jay Vosburgh <fubar at us dot ibm dot com> |
| * - Removed acquisition of xmit_lock in set_multicast_list; caused |
| * deadlock on SMP (lock is held by caller). |
| * - Revamped SIOCGMIIPHY, SIOCGMIIREG portion of bond_check_dev_link(). |
| * |
| * 2002/09/18 - Jay Vosburgh <fubar at us dot ibm dot com> |
| * - Fixed up bond_check_dev_link() (and callers): removed some magic |
| * numbers, banished local MII_ defines, wrapped ioctl calls to |
| * prevent EFAULT errors |
| * |
| * 2002/9/30 - Jay Vosburgh <fubar at us dot ibm dot com> |
| * - make sure the ip target matches the arp_target before saving the |
| * hw address. |
| * |
| * 2002/9/30 - Dan Eisner <eisner at 2robots dot com> |
| * - make sure my_ip is set before taking down the link, since |
| * not all switches respond if the source ip is not set. |
| * |
| * 2002/10/8 - Janice Girouard <girouard at us dot ibm dot com> |
| * - read in the local ip address when enslaving a device |
| * - add primary support |
| * - make sure 2*arp_interval has passed when a new device |
| * is brought on-line before taking it down. |
| * |
| * 2002/09/11 - Philippe De Muyter <phdm at macqel dot be> |
| * - Added bond_xmit_broadcast logic. |
| * - Added bond_mode() support function. |
| * |
| * 2002/10/26 - Laurent Deniel <laurent.deniel at free.fr> |
| * - allow to register multicast addresses only on active slave |
| * (useful in active-backup mode) |
| * - add multicast module parameter |
| * - fix deletion of multicast groups after unloading module |
| * |
| * 2002/11/06 - Kameshwara Rayaprolu <kameshwara.rao * wipro_com> |
| * - Changes to prevent panic from closing the device twice; if we close |
| * the device in bond_release, we must set the original_flags to down |
| * so it won't be closed again by the network layer. |
| * |
| * 2002/11/07 - Tony Cureington <tony.cureington * hp_com> |
| * - Fix arp_target_hw_addr memory leak |
| * - Created activebackup_arp_monitor function to handle arp monitoring |
| * in active backup mode - the bond_arp_monitor had several problems... |
| * such as allowing slaves to tx arps sequentially without any delay |
| * for a response |
| * - Renamed bond_arp_monitor to loadbalance_arp_monitor and re-wrote |
| * this function to just handle arp monitoring in load-balancing mode; |
| * it is a lot more compact now |
| * - Changes to ensure one and only one slave transmits in active-backup |
| * mode |
| * - Robustesize parameters; warn users about bad combinations of |
| * parameters; also if miimon is specified and a network driver does |
| * not support MII or ETHTOOL, inform the user of this |
| * - Changes to support link_failure_count when in arp monitoring mode |
| * - Fix up/down delay reported in /proc |
| * - Added version; log version; make version available from "modinfo -d" |
| * - Fixed problem in bond_check_dev_link - if the first IOCTL (SIOCGMIIPH) |
| * failed, the ETHTOOL ioctl never got a chance |
| * |
| * 2002/11/16 - Laurent Deniel <laurent.deniel at free.fr> |
| * - fix multicast handling in activebackup_arp_monitor |
| * - remove one unnecessary and confusing curr_active_slave == slave test |
| * in activebackup_arp_monitor |
| * |
| * 2002/11/17 - Laurent Deniel <laurent.deniel at free.fr> |
| * - fix bond_slave_info_query when slave_id = num_slaves |
| * |
| * 2002/11/19 - Janice Girouard <girouard at us dot ibm dot com> |
| * - correct ifr_data reference. Update ifr_data reference |
| * to mii_ioctl_data struct values to avoid confusion. |
| * |
| * 2002/11/22 - Bert Barbe <bert.barbe at oracle dot com> |
| * - Add support for multiple arp_ip_target |
| * |
| * 2002/12/13 - Jay Vosburgh <fubar at us dot ibm dot com> |
| * - Changed to allow text strings for mode and multicast, e.g., |
| * insmod bonding mode=active-backup. The numbers still work. |
| * One change: an invalid choice will cause module load failure, |
| * rather than the previous behavior of just picking one. |
| * - Minor cleanups; got rid of dup ctype stuff, atoi function |
| * |
| * 2003/02/07 - Jay Vosburgh <fubar at us dot ibm dot com> |
| * - Added use_carrier module parameter that causes miimon to |
| * use netif_carrier_ok() test instead of MII/ETHTOOL ioctls. |
| * - Minor cleanups; consolidated ioctl calls to one function. |
| * |
| * 2003/02/07 - Tony Cureington <tony.cureington * hp_com> |
| * - Fix bond_mii_monitor() logic error that could result in |
| * bonding round-robin mode ignoring links after failover/recovery |
| * |
| * 2003/03/17 - Jay Vosburgh <fubar at us dot ibm dot com> |
| * - kmalloc fix (GFP_KERNEL to GFP_ATOMIC) reported by |
| * Shmulik dot Hen at intel.com. |
| * - Based on discussion on mailing list, changed use of |
| * update_slave_cnt(), created wrapper functions for adding/removing |
| * slaves, changed bond_xmit_xor() to check slave_cnt instead of |
| * checking slave and slave->dev (which only worked by accident). |
| * - Misc code cleanup: get arp_send() prototype from header file, |
| * add max_bonds to bonding.txt. |
| * |
| * 2003/03/18 - Tsippy Mendelson <tsippy.mendelson at intel dot com> and |
| * Shmulik Hen <shmulik.hen at intel dot com> |
| * - Make sure only bond_attach_slave() and bond_detach_slave() can |
| * manipulate the slave list, including slave_cnt, even when in |
| * bond_release_all(). |
| * - Fixed hang in bond_release() with traffic running: |
| * netdev_set_master() must not be called from within the bond lock. |
| * |
| * 2003/03/18 - Tsippy Mendelson <tsippy.mendelson at intel dot com> and |
| * Shmulik Hen <shmulik.hen at intel dot com> |
| * - Fixed hang in bond_enslave() with traffic running: |
| * netdev_set_master() must not be called from within the bond lock. |
| * |
| * 2003/03/18 - Amir Noam <amir.noam at intel dot com> |
| * - Added support for getting slave's speed and duplex via ethtool. |
| * Needed for 802.3ad and other future modes. |
| * |
| * 2003/03/18 - Tsippy Mendelson <tsippy.mendelson at intel dot com> and |
| * Shmulik Hen <shmulik.hen at intel dot com> |
| * - Enable support of modes that need to use the unique mac address of |
| * each slave. |
| * * bond_enslave(): Moved setting the slave's mac address, and |
| * openning it, from the application to the driver. This breaks |
| * backward comaptibility with old versions of ifenslave that open |
| * the slave before enalsving it !!!. |
| * * bond_release(): The driver also takes care of closing the slave |
| * and restoring its original mac address. |
| * - Removed the code that restores all base driver's flags. |
| * Flags are automatically restored once all undo stages are done |
| * properly. |
| * - Block possibility of enslaving before the master is up. This |
| * prevents putting the system in an unstable state. |
| * |
| * 2003/03/18 - Amir Noam <amir.noam at intel dot com>, |
| * Tsippy Mendelson <tsippy.mendelson at intel dot com> and |
| * Shmulik Hen <shmulik.hen at intel dot com> |
| * - Added support for IEEE 802.3ad Dynamic link aggregation mode. |
| * |
| * 2003/05/01 - Amir Noam <amir.noam at intel dot com> |
| * - Added ABI version control to restore compatibility between |
| * new/old ifenslave and new/old bonding. |
| * |
| * 2003/05/01 - Shmulik Hen <shmulik.hen at intel dot com> |
| * - Fixed bug in bond_release_all(): save old value of curr_active_slave |
| * before setting it to NULL. |
| * - Changed driver versioning scheme to include version number instead |
| * of release date (that is already in another field). There are 3 |
| * fields X.Y.Z where: |
| * X - Major version - big behavior changes |
| * Y - Minor version - addition of features |
| * Z - Extra version - minor changes and bug fixes |
| * The current version is 1.0.0 as a base line. |
| * |
| * 2003/05/01 - Tsippy Mendelson <tsippy.mendelson at intel dot com> and |
| * Amir Noam <amir.noam at intel dot com> |
| * - Added support for lacp_rate module param. |
| * - Code beautification and style changes (mainly in comments). |
| * new version - 1.0.1 |
| * |
| * 2003/05/01 - Shmulik Hen <shmulik.hen at intel dot com> |
| * - Based on discussion on mailing list, changed locking scheme |
| * to use lock/unlock or lock_bh/unlock_bh appropriately instead |
| * of lock_irqsave/unlock_irqrestore. The new scheme helps exposing |
| * hidden bugs and solves system hangs that occurred due to the fact |
| * that holding lock_irqsave doesn't prevent softirqs from running. |
| * This also increases total throughput since interrupts are not |
| * blocked on each transmitted packets or monitor timeout. |
| * new version - 2.0.0 |
| * |
| * 2003/05/01 - Shmulik Hen <shmulik.hen at intel dot com> |
| * - Added support for Transmit load balancing mode. |
| * - Concentrate all assignments of curr_active_slave to a single point |
| * so specific modes can take actions when the primary adapter is |
| * changed. |
| * - Take the updelay parameter into consideration during bond_enslave |
| * since some adapters loose their link during setting the device. |
| * - Renamed bond_3ad_link_status_changed() to |
| * bond_3ad_handle_link_change() for compatibility with TLB. |
| * new version - 2.1.0 |
| * |
| * 2003/05/01 - Tsippy Mendelson <tsippy.mendelson at intel dot com> |
| * - Added support for Adaptive load balancing mode which is |
| * equivalent to Transmit load balancing + Receive load balancing. |
| * new version - 2.2.0 |
| * |
| * 2003/05/15 - Jay Vosburgh <fubar at us dot ibm dot com> |
| * - Applied fix to activebackup_arp_monitor posted to bonding-devel |
| * by Tony Cureington <tony.cureington * hp_com>. Fixes ARP |
| * monitor endless failover bug. Version to 2.2.10 |
| * |
| * 2003/05/20 - Amir Noam <amir.noam at intel dot com> |
| * - Fixed bug in ABI version control - Don't commit to a specific |
| * ABI version if receiving unsupported ioctl commands. |
| * |
| * 2003/05/22 - Jay Vosburgh <fubar at us dot ibm dot com> |
| * - Fix ifenslave -c causing bond to loose existing routes; |
| * added bond_set_mac_address() that doesn't require the |
| * bond to be down. |
| * - In conjunction with fix for ifenslave -c, in |
| * bond_change_active(), changing to the already active slave |
| * is no longer an error (it successfully does nothing). |
| * |
| * 2003/06/30 - Amir Noam <amir.noam at intel dot com> |
| * - Fixed bond_change_active() for ALB/TLB modes. |
| * Version to 2.2.14. |
| * |
| * 2003/07/29 - Amir Noam <amir.noam at intel dot com> |
| * - Fixed ARP monitoring bug. |
| * Version to 2.2.15. |
| * |
| * 2003/07/31 - Willy Tarreau <willy at ods dot org> |
| * - Fixed kernel panic when using ARP monitoring without |
| * setting bond's IP address. |
| * Version to 2.2.16. |
| * |
| * 2003/08/06 - Amir Noam <amir.noam at intel dot com> |
| * - Back port from 2.6: use alloc_netdev(); fix /proc handling; |
| * made stats a part of bond struct so no need to allocate |
| * and free it separately; use standard list operations instead |
| * of pre-allocated array of bonds. |
| * Version to 2.3.0. |
| * |
| * 2003/08/07 - Jay Vosburgh <fubar at us dot ibm dot com>, |
| * Amir Noam <amir.noam at intel dot com> and |
| * Shmulik Hen <shmulik.hen at intel dot com> |
| * - Propagating master's settings: Distinguish between modes that |
| * use a primary slave from those that don't, and propagate settings |
| * accordingly; Consolidate change_active opeartions and add |
| * reselect_active and find_best opeartions; Decouple promiscuous |
| * handling from the multicast mode setting; Add support for changing |
| * HW address and MTU with proper unwind; Consolidate procfs code, |
| * add CHANGENAME handler; Enhance netdev notification handling. |
| * Version to 2.4.0. |
| * |
| * 2003/09/15 - Stephen Hemminger <shemminger at osdl dot org>, |
| * Amir Noam <amir.noam at intel dot com> |
| * - Convert /proc to seq_file interface. |
| * Change /proc/net/bondX/info to /proc/net/bonding/bondX. |
| * Set version to 2.4.1. |
| * |
| * 2003/11/20 - Amir Noam <amir.noam at intel dot com> |
| * - Fix /proc creation/destruction. |
| * |
| * 2003/12/01 - Shmulik Hen <shmulik.hen at intel dot com> |
| * - Massive cleanup - Set version to 2.5.0 |
| * Code changes: |
| * o Consolidate format of prints and debug prints. |
| * o Remove bonding_t/slave_t typedefs and consolidate all casts. |
| * o Remove dead code and unnecessary checks. |
| * o Consolidate starting/stopping timers. |
| * o Consolidate handling of primary module param throughout the code. |
| * o Removed multicast module param support - all settings are done |
| * according to mode. |
| * o Slave list iteration - bond is no longer part of the list, |
| * added cyclic list iteration macros. |
| * o Consolidate error handling in all xmit functions. |
| * Style changes: |
| * o Consolidate function naming and declarations. |
| * o Consolidate function params and local variables names. |
| * o Consolidate return values. |
| * o Consolidate curly braces. |
| * o Consolidate conditionals format. |
| * o Change struct member names and types. |
| * o Chomp trailing spaces, remove empty lines, fix indentations. |
| * o Re-organize code according to context. |
| * |
| * 2003/12/30 - Amir Noam <amir.noam at intel dot com> |
| * - Fixed: Cannot remove and re-enslave the original active slave. |
| * - Fixed: Releasing the original active slave causes mac address |
| * duplication. |
| * - Add support for slaves that use ethtool_ops. |
| * Set version to 2.5.3. |
| * |
| * 2004/01/05 - Amir Noam <amir.noam at intel dot com> |
| * - Save bonding parameters per bond instead of using the global values. |
| * Set version to 2.5.4. |
| * |
| * 2004/01/14 - Shmulik Hen <shmulik.hen at intel dot com> |
| * - Enhance VLAN support: |
| * * Add support for VLAN hardware acceleration capable slaves. |
| * * Add capability to tag self generated packets in ALB/TLB modes. |
| * Set version to 2.6.0. |
| * 2004/10/29 - Mitch Williams <mitch.a.williams at intel dot com> |
| * - Fixed bug when unloading module while using 802.3ad. If |
| * spinlock debugging is turned on, this causes a stack dump. |
| * Solution is to move call to dev_remove_pack outside of the |
| * spinlock. |
| * Set version to 2.6.1. |
| * |
| */ |
| |
| //#define BONDING_DEBUG 1 |
| |
| #include <linux/config.h> |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/sched.h> |
| #include <linux/types.h> |
| #include <linux/fcntl.h> |
| #include <linux/interrupt.h> |
| #include <linux/ptrace.h> |
| #include <linux/ioport.h> |
| #include <linux/in.h> |
| #include <linux/ip.h> |
| #include <linux/slab.h> |
| #include <linux/string.h> |
| #include <linux/init.h> |
| #include <linux/timer.h> |
| #include <linux/socket.h> |
| #include <linux/ctype.h> |
| #include <linux/inet.h> |
| #include <linux/bitops.h> |
| #include <asm/system.h> |
| #include <asm/io.h> |
| #include <asm/dma.h> |
| #include <asm/uaccess.h> |
| #include <linux/errno.h> |
| #include <linux/netdevice.h> |
| #include <linux/inetdevice.h> |
| #include <linux/etherdevice.h> |
| #include <linux/skbuff.h> |
| #include <net/sock.h> |
| #include <linux/rtnetlink.h> |
| #include <linux/proc_fs.h> |
| #include <linux/seq_file.h> |
| #include <linux/smp.h> |
| #include <linux/if_ether.h> |
| #include <net/arp.h> |
| #include <linux/mii.h> |
| #include <linux/ethtool.h> |
| #include <linux/if_vlan.h> |
| #include <linux/if_bonding.h> |
| #include "bonding.h" |
| #include "bond_3ad.h" |
| #include "bond_alb.h" |
| |
| /*---------------------------- Module parameters ----------------------------*/ |
| |
| /* monitor all links that often (in milliseconds). <=0 disables monitoring */ |
| #define BOND_LINK_MON_INTERV 0 |
| #define BOND_LINK_ARP_INTERV 0 |
| |
| static int max_bonds = BOND_DEFAULT_MAX_BONDS; |
| static int miimon = BOND_LINK_MON_INTERV; |
| static int updelay = 0; |
| static int downdelay = 0; |
| static int use_carrier = 1; |
| static char *mode = NULL; |
| static char *primary = NULL; |
| static char *lacp_rate = NULL; |
| static int arp_interval = BOND_LINK_ARP_INTERV; |
| static char *arp_ip_target[BOND_MAX_ARP_TARGETS] = { NULL, }; |
| |
| module_param(max_bonds, int, 0); |
| MODULE_PARM_DESC(max_bonds, "Max number of bonded devices"); |
| module_param(miimon, int, 0); |
| MODULE_PARM_DESC(miimon, "Link check interval in milliseconds"); |
| module_param(updelay, int, 0); |
| MODULE_PARM_DESC(updelay, "Delay before considering link up, in milliseconds"); |
| module_param(downdelay, int, 0); |
| MODULE_PARM_DESC(downdelay, "Delay before considering link down, in milliseconds"); |
| module_param(use_carrier, int, 0); |
| MODULE_PARM_DESC(use_carrier, "Use netif_carrier_ok (vs MII ioctls) in miimon; 0 for off, 1 for on (default)"); |
| module_param(mode, charp, 0); |
| MODULE_PARM_DESC(mode, "Mode of operation : 0 for round robin, 1 for active-backup, 2 for xor"); |
| module_param(primary, charp, 0); |
| MODULE_PARM_DESC(primary, "Primary network device to use"); |
| module_param(lacp_rate, charp, 0); |
| MODULE_PARM_DESC(lacp_rate, "LACPDU tx rate to request from 802.3ad partner (slow/fast)"); |
| module_param(arp_interval, int, 0); |
| MODULE_PARM_DESC(arp_interval, "arp interval in milliseconds"); |
| module_param_array(arp_ip_target, charp, NULL, 0); |
| MODULE_PARM_DESC(arp_ip_target, "arp targets in n.n.n.n form"); |
| |
| /*----------------------------- Global variables ----------------------------*/ |
| |
| static const char *version = |
| DRV_DESCRIPTION ": v" DRV_VERSION " (" DRV_RELDATE ")\n"; |
| |
| static LIST_HEAD(bond_dev_list); |
| |
| #ifdef CONFIG_PROC_FS |
| static struct proc_dir_entry *bond_proc_dir = NULL; |
| #endif |
| |
| static u32 arp_target[BOND_MAX_ARP_TARGETS] = { 0, } ; |
| static int arp_ip_count = 0; |
| static u32 my_ip = 0; |
| static int bond_mode = BOND_MODE_ROUNDROBIN; |
| static int lacp_fast = 0; |
| static int app_abi_ver = 0; |
| static int orig_app_abi_ver = -1; /* This is used to save the first ABI version |
| * we receive from the application. Once set, |
| * it won't be changed, and the module will |
| * refuse to enslave/release interfaces if the |
| * command comes from an application using |
| * another ABI version. |
| */ |
| |
| struct bond_parm_tbl { |
| char *modename; |
| int mode; |
| }; |
| |
| static struct bond_parm_tbl bond_lacp_tbl[] = { |
| { "slow", AD_LACP_SLOW}, |
| { "fast", AD_LACP_FAST}, |
| { NULL, -1}, |
| }; |
| |
| static struct bond_parm_tbl bond_mode_tbl[] = { |
| { "balance-rr", BOND_MODE_ROUNDROBIN}, |
| { "active-backup", BOND_MODE_ACTIVEBACKUP}, |
| { "balance-xor", BOND_MODE_XOR}, |
| { "broadcast", BOND_MODE_BROADCAST}, |
| { "802.3ad", BOND_MODE_8023AD}, |
| { "balance-tlb", BOND_MODE_TLB}, |
| { "balance-alb", BOND_MODE_ALB}, |
| { NULL, -1}, |
| }; |
| |
| /*-------------------------- Forward declarations ---------------------------*/ |
| |
| static inline void bond_set_mode_ops(struct net_device *bond_dev, int mode); |
| |
| /*---------------------------- General routines -----------------------------*/ |
| |
| static const char *bond_mode_name(int mode) |
| { |
| switch (mode) { |
| case BOND_MODE_ROUNDROBIN : |
| return "load balancing (round-robin)"; |
| case BOND_MODE_ACTIVEBACKUP : |
| return "fault-tolerance (active-backup)"; |
| case BOND_MODE_XOR : |
| return "load balancing (xor)"; |
| case BOND_MODE_BROADCAST : |
| return "fault-tolerance (broadcast)"; |
| case BOND_MODE_8023AD: |
| return "IEEE 802.3ad Dynamic link aggregation"; |
| case BOND_MODE_TLB: |
| return "transmit load balancing"; |
| case BOND_MODE_ALB: |
| return "adaptive load balancing"; |
| default: |
| return "unknown"; |
| } |
| } |
| |
| /*---------------------------------- VLAN -----------------------------------*/ |
| |
| /** |
| * bond_add_vlan - add a new vlan id on bond |
| * @bond: bond that got the notification |
| * @vlan_id: the vlan id to add |
| * |
| * Returns -ENOMEM if allocation failed. |
| */ |
| static int bond_add_vlan(struct bonding *bond, unsigned short vlan_id) |
| { |
| struct vlan_entry *vlan; |
| |
| dprintk("bond: %s, vlan id %d\n", |
| (bond ? bond->dev->name: "None"), vlan_id); |
| |
| vlan = kmalloc(sizeof(struct vlan_entry), GFP_KERNEL); |
| if (!vlan) { |
| return -ENOMEM; |
| } |
| |
| INIT_LIST_HEAD(&vlan->vlan_list); |
| vlan->vlan_id = vlan_id; |
| |
| write_lock_bh(&bond->lock); |
| |
| list_add_tail(&vlan->vlan_list, &bond->vlan_list); |
| |
| write_unlock_bh(&bond->lock); |
| |
| dprintk("added VLAN ID %d on bond %s\n", vlan_id, bond->dev->name); |
| |
| return 0; |
| } |
| |
| /** |
| * bond_del_vlan - delete a vlan id from bond |
| * @bond: bond that got the notification |
| * @vlan_id: the vlan id to delete |
| * |
| * returns -ENODEV if @vlan_id was not found in @bond. |
| */ |
| static int bond_del_vlan(struct bonding *bond, unsigned short vlan_id) |
| { |
| struct vlan_entry *vlan, *next; |
| int res = -ENODEV; |
| |
| dprintk("bond: %s, vlan id %d\n", bond->dev->name, vlan_id); |
| |
| write_lock_bh(&bond->lock); |
| |
| list_for_each_entry_safe(vlan, next, &bond->vlan_list, vlan_list) { |
| if (vlan->vlan_id == vlan_id) { |
| list_del(&vlan->vlan_list); |
| |
| if ((bond->params.mode == BOND_MODE_TLB) || |
| (bond->params.mode == BOND_MODE_ALB)) { |
| bond_alb_clear_vlan(bond, vlan_id); |
| } |
| |
| dprintk("removed VLAN ID %d from bond %s\n", vlan_id, |
| bond->dev->name); |
| |
| kfree(vlan); |
| |
| if (list_empty(&bond->vlan_list) && |
| (bond->slave_cnt == 0)) { |
| /* Last VLAN removed and no slaves, so |
| * restore block on adding VLANs. This will |
| * be removed once new slaves that are not |
| * VLAN challenged will be added. |
| */ |
| bond->dev->features |= NETIF_F_VLAN_CHALLENGED; |
| } |
| |
| res = 0; |
| goto out; |
| } |
| } |
| |
| dprintk("couldn't find VLAN ID %d in bond %s\n", vlan_id, |
| bond->dev->name); |
| |
| out: |
| write_unlock_bh(&bond->lock); |
| return res; |
| } |
| |
| /** |
| * bond_has_challenged_slaves |
| * @bond: the bond we're working on |
| * |
| * Searches the slave list. Returns 1 if a vlan challenged slave |
| * was found, 0 otherwise. |
| * |
| * Assumes bond->lock is held. |
| */ |
| static int bond_has_challenged_slaves(struct bonding *bond) |
| { |
| struct slave *slave; |
| int i; |
| |
| bond_for_each_slave(bond, slave, i) { |
| if (slave->dev->features & NETIF_F_VLAN_CHALLENGED) { |
| dprintk("found VLAN challenged slave - %s\n", |
| slave->dev->name); |
| return 1; |
| } |
| } |
| |
| dprintk("no VLAN challenged slaves found\n"); |
| return 0; |
| } |
| |
| /** |
| * bond_next_vlan - safely skip to the next item in the vlans list. |
| * @bond: the bond we're working on |
| * @curr: item we're advancing from |
| * |
| * Returns %NULL if list is empty, bond->next_vlan if @curr is %NULL, |
| * or @curr->next otherwise (even if it is @curr itself again). |
| * |
| * Caller must hold bond->lock |
| */ |
| struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr) |
| { |
| struct vlan_entry *next, *last; |
| |
| if (list_empty(&bond->vlan_list)) { |
| return NULL; |
| } |
| |
| if (!curr) { |
| next = list_entry(bond->vlan_list.next, |
| struct vlan_entry, vlan_list); |
| } else { |
| last = list_entry(bond->vlan_list.prev, |
| struct vlan_entry, vlan_list); |
| if (last == curr) { |
| next = list_entry(bond->vlan_list.next, |
| struct vlan_entry, vlan_list); |
| } else { |
| next = list_entry(curr->vlan_list.next, |
| struct vlan_entry, vlan_list); |
| } |
| } |
| |
| return next; |
| } |
| |
| /** |
| * bond_dev_queue_xmit - Prepare skb for xmit. |
| * |
| * @bond: bond device that got this skb for tx. |
| * @skb: hw accel VLAN tagged skb to transmit |
| * @slave_dev: slave that is supposed to xmit this skbuff |
| * |
| * When the bond gets an skb to transmit that is |
| * already hardware accelerated VLAN tagged, and it |
| * needs to relay this skb to a slave that is not |
| * hw accel capable, the skb needs to be "unaccelerated", |
| * i.e. strip the hwaccel tag and re-insert it as part |
| * of the payload. |
| */ |
| int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev) |
| { |
| unsigned short vlan_id; |
| |
| if (!list_empty(&bond->vlan_list) && |
| !(slave_dev->features & NETIF_F_HW_VLAN_TX) && |
| vlan_get_tag(skb, &vlan_id) == 0) { |
| skb->dev = slave_dev; |
| skb = vlan_put_tag(skb, vlan_id); |
| if (!skb) { |
| /* vlan_put_tag() frees the skb in case of error, |
| * so return success here so the calling functions |
| * won't attempt to free is again. |
| */ |
| return 0; |
| } |
| } else { |
| skb->dev = slave_dev; |
| } |
| |
| skb->priority = 1; |
| dev_queue_xmit(skb); |
| |
| return 0; |
| } |
| |
| /* |
| * In the following 3 functions, bond_vlan_rx_register(), bond_vlan_rx_add_vid |
| * and bond_vlan_rx_kill_vid, We don't protect the slave list iteration with a |
| * lock because: |
| * a. This operation is performed in IOCTL context, |
| * b. The operation is protected by the RTNL semaphore in the 8021q code, |
| * c. Holding a lock with BH disabled while directly calling a base driver |
| * entry point is generally a BAD idea. |
| * |
| * The design of synchronization/protection for this operation in the 8021q |
| * module is good for one or more VLAN devices over a single physical device |
| * and cannot be extended for a teaming solution like bonding, so there is a |
| * potential race condition here where a net device from the vlan group might |
| * be referenced (either by a base driver or the 8021q code) while it is being |
| * removed from the system. However, it turns out we're not making matters |
| * worse, and if it works for regular VLAN usage it will work here too. |
| */ |
| |
| /** |
| * bond_vlan_rx_register - Propagates registration to slaves |
| * @bond_dev: bonding net device that got called |
| * @grp: vlan group being registered |
| */ |
| static void bond_vlan_rx_register(struct net_device *bond_dev, struct vlan_group *grp) |
| { |
| struct bonding *bond = bond_dev->priv; |
| struct slave *slave; |
| int i; |
| |
| bond->vlgrp = grp; |
| |
| bond_for_each_slave(bond, slave, i) { |
| struct net_device *slave_dev = slave->dev; |
| |
| if ((slave_dev->features & NETIF_F_HW_VLAN_RX) && |
| slave_dev->vlan_rx_register) { |
| slave_dev->vlan_rx_register(slave_dev, grp); |
| } |
| } |
| } |
| |
| /** |
| * bond_vlan_rx_add_vid - Propagates adding an id to slaves |
| * @bond_dev: bonding net device that got called |
| * @vid: vlan id being added |
| */ |
| static void bond_vlan_rx_add_vid(struct net_device *bond_dev, uint16_t vid) |
| { |
| struct bonding *bond = bond_dev->priv; |
| struct slave *slave; |
| int i, res; |
| |
| bond_for_each_slave(bond, slave, i) { |
| struct net_device *slave_dev = slave->dev; |
| |
| if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) && |
| slave_dev->vlan_rx_add_vid) { |
| slave_dev->vlan_rx_add_vid(slave_dev, vid); |
| } |
| } |
| |
| res = bond_add_vlan(bond, vid); |
| if (res) { |
| printk(KERN_ERR DRV_NAME |
| ": %s: Failed to add vlan id %d\n", |
| bond_dev->name, vid); |
| } |
| } |
| |
| /** |
| * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves |
| * @bond_dev: bonding net device that got called |
| * @vid: vlan id being removed |
| */ |
| static void bond_vlan_rx_kill_vid(struct net_device *bond_dev, uint16_t vid) |
| { |
| struct bonding *bond = bond_dev->priv; |
| struct slave *slave; |
| struct net_device *vlan_dev; |
| int i, res; |
| |
| bond_for_each_slave(bond, slave, i) { |
| struct net_device *slave_dev = slave->dev; |
| |
| if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) && |
| slave_dev->vlan_rx_kill_vid) { |
| /* Save and then restore vlan_dev in the grp array, |
| * since the slave's driver might clear it. |
| */ |
| vlan_dev = bond->vlgrp->vlan_devices[vid]; |
| slave_dev->vlan_rx_kill_vid(slave_dev, vid); |
| bond->vlgrp->vlan_devices[vid] = vlan_dev; |
| } |
| } |
| |
| res = bond_del_vlan(bond, vid); |
| if (res) { |
| printk(KERN_ERR DRV_NAME |
| ": %s: Failed to remove vlan id %d\n", |
| bond_dev->name, vid); |
| } |
| } |
| |
| static void bond_add_vlans_on_slave(struct bonding *bond, struct net_device *slave_dev) |
| { |
| struct vlan_entry *vlan; |
| |
| write_lock_bh(&bond->lock); |
| |
| if (list_empty(&bond->vlan_list)) { |
| goto out; |
| } |
| |
| if ((slave_dev->features & NETIF_F_HW_VLAN_RX) && |
| slave_dev->vlan_rx_register) { |
| slave_dev->vlan_rx_register(slave_dev, bond->vlgrp); |
| } |
| |
| if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) || |
| !(slave_dev->vlan_rx_add_vid)) { |
| goto out; |
| } |
| |
| list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
| slave_dev->vlan_rx_add_vid(slave_dev, vlan->vlan_id); |
| } |
| |
| out: |
| write_unlock_bh(&bond->lock); |
| } |
| |
| static void bond_del_vlans_from_slave(struct bonding *bond, struct net_device *slave_dev) |
| { |
| struct vlan_entry *vlan; |
| struct net_device *vlan_dev; |
| |
| write_lock_bh(&bond->lock); |
| |
| if (list_empty(&bond->vlan_list)) { |
| goto out; |
| } |
| |
| if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) || |
| !(slave_dev->vlan_rx_kill_vid)) { |
| goto unreg; |
| } |
| |
| list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
| /* Save and then restore vlan_dev in the grp array, |
| * since the slave's driver might clear it. |
| */ |
| vlan_dev = bond->vlgrp->vlan_devices[vlan->vlan_id]; |
| slave_dev->vlan_rx_kill_vid(slave_dev, vlan->vlan_id); |
| bond->vlgrp->vlan_devices[vlan->vlan_id] = vlan_dev; |
| } |
| |
| unreg: |
| if ((slave_dev->features & NETIF_F_HW_VLAN_RX) && |
| slave_dev->vlan_rx_register) { |
| slave_dev->vlan_rx_register(slave_dev, NULL); |
| } |
| |
| out: |
| write_unlock_bh(&bond->lock); |
| } |
| |
| /*------------------------------- Link status -------------------------------*/ |
| |
| /* |
| * Get link speed and duplex from the slave's base driver |
| * using ethtool. If for some reason the call fails or the |
| * values are invalid, fake speed and duplex to 100/Full |
| * and return error. |
| */ |
| static int bond_update_speed_duplex(struct slave *slave) |
| { |
| struct net_device *slave_dev = slave->dev; |
| static int (* ioctl)(struct net_device *, struct ifreq *, int); |
| struct ifreq ifr; |
| struct ethtool_cmd etool; |
| |
| /* Fake speed and duplex */ |
| slave->speed = SPEED_100; |
| slave->duplex = DUPLEX_FULL; |
| |
| if (slave_dev->ethtool_ops) { |
| u32 res; |
| |
| if (!slave_dev->ethtool_ops->get_settings) { |
| return -1; |
| } |
| |
| res = slave_dev->ethtool_ops->get_settings(slave_dev, &etool); |
| if (res < 0) { |
| return -1; |
| } |
| |
| goto verify; |
| } |
| |
| ioctl = slave_dev->do_ioctl; |
| strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ); |
| etool.cmd = ETHTOOL_GSET; |
| ifr.ifr_data = (char*)&etool; |
| if (!ioctl || (IOCTL(slave_dev, &ifr, SIOCETHTOOL) < 0)) { |
| return -1; |
| } |
| |
| verify: |
| switch (etool.speed) { |
| case SPEED_10: |
| case SPEED_100: |
| case SPEED_1000: |
| break; |
| default: |
| return -1; |
| } |
| |
| switch (etool.duplex) { |
| case DUPLEX_FULL: |
| case DUPLEX_HALF: |
| break; |
| default: |
| return -1; |
| } |
| |
| slave->speed = etool.speed; |
| slave->duplex = etool.duplex; |
| |
| return 0; |
| } |
| |
| /* |
| * if <dev> supports MII link status reporting, check its link status. |
| * |
| * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(), |
| * depening upon the setting of the use_carrier parameter. |
| * |
| * Return either BMSR_LSTATUS, meaning that the link is up (or we |
| * can't tell and just pretend it is), or 0, meaning that the link is |
| * down. |
| * |
| * If reporting is non-zero, instead of faking link up, return -1 if |
| * both ETHTOOL and MII ioctls fail (meaning the device does not |
| * support them). If use_carrier is set, return whatever it says. |
| * It'd be nice if there was a good way to tell if a driver supports |
| * netif_carrier, but there really isn't. |
| */ |
| static int bond_check_dev_link(struct bonding *bond, struct net_device *slave_dev, int reporting) |
| { |
| static int (* ioctl)(struct net_device *, struct ifreq *, int); |
| struct ifreq ifr; |
| struct mii_ioctl_data *mii; |
| struct ethtool_value etool; |
| |
| if (bond->params.use_carrier) { |
| return netif_carrier_ok(slave_dev) ? BMSR_LSTATUS : 0; |
| } |
| |
| ioctl = slave_dev->do_ioctl; |
| if (ioctl) { |
| /* TODO: set pointer to correct ioctl on a per team member */ |
| /* bases to make this more efficient. that is, once */ |
| /* we determine the correct ioctl, we will always */ |
| /* call it and not the others for that team */ |
| /* member. */ |
| |
| /* |
| * We cannot assume that SIOCGMIIPHY will also read a |
| * register; not all network drivers (e.g., e100) |
| * support that. |
| */ |
| |
| /* Yes, the mii is overlaid on the ifreq.ifr_ifru */ |
| strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ); |
| mii = if_mii(&ifr); |
| if (IOCTL(slave_dev, &ifr, SIOCGMIIPHY) == 0) { |
| mii->reg_num = MII_BMSR; |
| if (IOCTL(slave_dev, &ifr, SIOCGMIIREG) == 0) { |
| return (mii->val_out & BMSR_LSTATUS); |
| } |
| } |
| } |
| |
| /* try SIOCETHTOOL ioctl, some drivers cache ETHTOOL_GLINK */ |
| /* for a period of time so we attempt to get link status */ |
| /* from it last if the above MII ioctls fail... */ |
| if (slave_dev->ethtool_ops) { |
| if (slave_dev->ethtool_ops->get_link) { |
| u32 link; |
| |
| link = slave_dev->ethtool_ops->get_link(slave_dev); |
| |
| return link ? BMSR_LSTATUS : 0; |
| } |
| } |
| |
| if (ioctl) { |
| strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ); |
| etool.cmd = ETHTOOL_GLINK; |
| ifr.ifr_data = (char*)&etool; |
| if (IOCTL(slave_dev, &ifr, SIOCETHTOOL) == 0) { |
| if (etool.data == 1) { |
| return BMSR_LSTATUS; |
| } else { |
| dprintk("SIOCETHTOOL shows link down\n"); |
| return 0; |
| } |
| } |
| } |
| |
| /* |
| * If reporting, report that either there's no dev->do_ioctl, |
| * or both SIOCGMIIREG and SIOCETHTOOL failed (meaning that we |
| * cannot report link status). If not reporting, pretend |
| * we're ok. |
| */ |
| return (reporting ? -1 : BMSR_LSTATUS); |
| } |
| |
| /*----------------------------- Multicast list ------------------------------*/ |
| |
| /* |
| * Returns 0 if dmi1 and dmi2 are the same, non-0 otherwise |
| */ |
| static inline int bond_is_dmi_same(struct dev_mc_list *dmi1, struct dev_mc_list *dmi2) |
| { |
| return memcmp(dmi1->dmi_addr, dmi2->dmi_addr, dmi1->dmi_addrlen) == 0 && |
| dmi1->dmi_addrlen == dmi2->dmi_addrlen; |
| } |
| |
| /* |
| * returns dmi entry if found, NULL otherwise |
| */ |
| static struct dev_mc_list *bond_mc_list_find_dmi(struct dev_mc_list *dmi, struct dev_mc_list *mc_list) |
| { |
| struct dev_mc_list *idmi; |
| |
| for (idmi = mc_list; idmi; idmi = idmi->next) { |
| if (bond_is_dmi_same(dmi, idmi)) { |
| return idmi; |
| } |
| } |
| |
| return NULL; |
| } |
| |
| /* |
| * Push the promiscuity flag down to appropriate slaves |
| */ |
| static void bond_set_promiscuity(struct bonding *bond, int inc) |
| { |
| if (USES_PRIMARY(bond->params.mode)) { |
| /* write lock already acquired */ |
| if (bond->curr_active_slave) { |
| dev_set_promiscuity(bond->curr_active_slave->dev, inc); |
| } |
| } else { |
| struct slave *slave; |
| int i; |
| bond_for_each_slave(bond, slave, i) { |
| dev_set_promiscuity(slave->dev, inc); |
| } |
| } |
| } |
| |
| /* |
| * Push the allmulti flag down to all slaves |
| */ |
| static void bond_set_allmulti(struct bonding *bond, int inc) |
| { |
| if (USES_PRIMARY(bond->params.mode)) { |
| /* write lock already acquired */ |
| if (bond->curr_active_slave) { |
| dev_set_allmulti(bond->curr_active_slave->dev, inc); |
| } |
| } else { |
| struct slave *slave; |
| int i; |
| bond_for_each_slave(bond, slave, i) { |
| dev_set_allmulti(slave->dev, inc); |
| } |
| } |
| } |
| |
| /* |
| * Add a Multicast address to slaves |
| * according to mode |
| */ |
| static void bond_mc_add(struct bonding *bond, void *addr, int alen) |
| { |
| if (USES_PRIMARY(bond->params.mode)) { |
| /* write lock already acquired */ |
| if (bond->curr_active_slave) { |
| dev_mc_add(bond->curr_active_slave->dev, addr, alen, 0); |
| } |
| } else { |
| struct slave *slave; |
| int i; |
| bond_for_each_slave(bond, slave, i) { |
| dev_mc_add(slave->dev, addr, alen, 0); |
| } |
| } |
| } |
| |
| /* |
| * Remove a multicast address from slave |
| * according to mode |
| */ |
| static void bond_mc_delete(struct bonding *bond, void *addr, int alen) |
| { |
| if (USES_PRIMARY(bond->params.mode)) { |
| /* write lock already acquired */ |
| if (bond->curr_active_slave) { |
| dev_mc_delete(bond->curr_active_slave->dev, addr, alen, 0); |
| } |
| } else { |
| struct slave *slave; |
| int i; |
| bond_for_each_slave(bond, slave, i) { |
| dev_mc_delete(slave->dev, addr, alen, 0); |
| } |
| } |
| } |
| |
| /* |
| * Totally destroys the mc_list in bond |
| */ |
| static void bond_mc_list_destroy(struct bonding *bond) |
| { |
| struct dev_mc_list *dmi; |
| |
| dmi = bond->mc_list; |
| while (dmi) { |
| bond->mc_list = dmi->next; |
| kfree(dmi); |
| dmi = bond->mc_list; |
| } |
| } |
| |
| /* |
| * Copy all the Multicast addresses from src to the bonding device dst |
| */ |
| static int bond_mc_list_copy(struct dev_mc_list *mc_list, struct bonding *bond, int gpf_flag) |
| { |
| struct dev_mc_list *dmi, *new_dmi; |
| |
| for (dmi = mc_list; dmi; dmi = dmi->next) { |
| new_dmi = kmalloc(sizeof(struct dev_mc_list), gpf_flag); |
| |
| if (!new_dmi) { |
| /* FIXME: Potential memory leak !!! */ |
| return -ENOMEM; |
| } |
| |
| new_dmi->next = bond->mc_list; |
| bond->mc_list = new_dmi; |
| new_dmi->dmi_addrlen = dmi->dmi_addrlen; |
| memcpy(new_dmi->dmi_addr, dmi->dmi_addr, dmi->dmi_addrlen); |
| new_dmi->dmi_users = dmi->dmi_users; |
| new_dmi->dmi_gusers = dmi->dmi_gusers; |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * flush all members of flush->mc_list from device dev->mc_list |
| */ |
| static void bond_mc_list_flush(struct net_device *bond_dev, struct net_device *slave_dev) |
| { |
| struct bonding *bond = bond_dev->priv; |
| struct dev_mc_list *dmi; |
| |
| for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) { |
| dev_mc_delete(slave_dev, dmi->dmi_addr, dmi->dmi_addrlen, 0); |
| } |
| |
| if (bond->params.mode == BOND_MODE_8023AD) { |
| /* del lacpdu mc addr from mc list */ |
| u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR; |
| |
| dev_mc_delete(slave_dev, lacpdu_multicast, ETH_ALEN, 0); |
| } |
| } |
| |
| /*--------------------------- Active slave change ---------------------------*/ |
| |
| /* |
| * Update the mc list and multicast-related flags for the new and |
| * old active slaves (if any) according to the multicast mode, and |
| * promiscuous flags unconditionally. |
| */ |
| static void bond_mc_swap(struct bonding *bond, struct slave *new_active, struct slave *old_active) |
| { |
| struct dev_mc_list *dmi; |
| |
| if (!USES_PRIMARY(bond->params.mode)) { |
| /* nothing to do - mc list is already up-to-date on |
| * all slaves |
| */ |
| return; |
| } |
| |
| if (old_active) { |
| if (bond->dev->flags & IFF_PROMISC) { |
| dev_set_promiscuity(old_active->dev, -1); |
| } |
| |
| if (bond->dev->flags & IFF_ALLMULTI) { |
| dev_set_allmulti(old_active->dev, -1); |
| } |
| |
| for (dmi = bond->dev->mc_list; dmi; dmi = dmi->next) { |
| dev_mc_delete(old_active->dev, dmi->dmi_addr, dmi->dmi_addrlen, 0); |
| } |
| } |
| |
| if (new_active) { |
| if (bond->dev->flags & IFF_PROMISC) { |
| dev_set_promiscuity(new_active->dev, 1); |
| } |
| |
| if (bond->dev->flags & IFF_ALLMULTI) { |
| dev_set_allmulti(new_active->dev, 1); |
| } |
| |
| for (dmi = bond->dev->mc_list; dmi; dmi = dmi->next) { |
| dev_mc_add(new_active->dev, dmi->dmi_addr, dmi->dmi_addrlen, 0); |
| } |
| } |
| } |
| |
| /** |
| * find_best_interface - select the best available slave to be the active one |
| * @bond: our bonding struct |
| * |
| * Warning: Caller must hold curr_slave_lock for writing. |
| */ |
| static struct slave *bond_find_best_slave(struct bonding *bond) |
| { |
| struct slave *new_active, *old_active; |
| struct slave *bestslave = NULL; |
| int mintime = bond->params.updelay; |
| int i; |
| |
| new_active = old_active = bond->curr_active_slave; |
| |
| if (!new_active) { /* there were no active slaves left */ |
| if (bond->slave_cnt > 0) { /* found one slave */ |
| new_active = bond->first_slave; |
| } else { |
| return NULL; /* still no slave, return NULL */ |
| } |
| } |
| |
| /* first try the primary link; if arping, a link must tx/rx traffic |
| * before it can be considered the curr_active_slave - also, we would skip |
| * slaves between the curr_active_slave and primary_slave that may be up |
| * and able to arp |
| */ |
| if ((bond->primary_slave) && |
| (!bond->params.arp_interval) && |
| (IS_UP(bond->primary_slave->dev))) { |
| new_active = bond->primary_slave; |
| } |
| |
| /* remember where to stop iterating over the slaves */ |
| old_active = new_active; |
| |
| bond_for_each_slave_from(bond, new_active, i, old_active) { |
| if (IS_UP(new_active->dev)) { |
| if (new_active->link == BOND_LINK_UP) { |
| return new_active; |
| } else if (new_active->link == BOND_LINK_BACK) { |
| /* link up, but waiting for stabilization */ |
| if (new_active->delay < mintime) { |
| mintime = new_active->delay; |
| bestslave = new_active; |
| } |
| } |
| } |
| } |
| |
| return bestslave; |
| } |
| |
| /** |
| * change_active_interface - change the active slave into the specified one |
| * @bond: our bonding struct |
| * @new: the new slave to make the active one |
| * |
| * Set the new slave to the bond's settings and unset them on the old |
| * curr_active_slave. |
| * Setting include flags, mc-list, promiscuity, allmulti, etc. |
| * |
| * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP, |
| * because it is apparently the best available slave we have, even though its |
| * updelay hasn't timed out yet. |
| * |
| * Warning: Caller must hold curr_slave_lock for writing. |
| */ |
| static void bond_change_active_slave(struct bonding *bond, struct slave *new_active) |
| { |
| struct slave *old_active = bond->curr_active_slave; |
| |
| if (old_active == new_active) { |
| return; |
| } |
| |
| if (new_active) { |
| if (new_active->link == BOND_LINK_BACK) { |
| if (USES_PRIMARY(bond->params.mode)) { |
| printk(KERN_INFO DRV_NAME |
| ": %s: making interface %s the new " |
| "active one %d ms earlier.\n", |
| bond->dev->name, new_active->dev->name, |
| (bond->params.updelay - new_active->delay) * bond->params.miimon); |
| } |
| |
| new_active->delay = 0; |
| new_active->link = BOND_LINK_UP; |
| new_active->jiffies = jiffies; |
| |
| if (bond->params.mode == BOND_MODE_8023AD) { |
| bond_3ad_handle_link_change(new_active, BOND_LINK_UP); |
| } |
| |
| if ((bond->params.mode == BOND_MODE_TLB) || |
| (bond->params.mode == BOND_MODE_ALB)) { |
| bond_alb_handle_link_change(bond, new_active, BOND_LINK_UP); |
| } |
| } else { |
| if (USES_PRIMARY(bond->params.mode)) { |
| printk(KERN_INFO DRV_NAME |
| ": %s: making interface %s the new " |
| "active one.\n", |
| bond->dev->name, new_active->dev->name); |
| } |
| } |
| } |
| |
| if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) { |
| if (old_active) { |
| bond_set_slave_inactive_flags(old_active); |
| } |
| |
| if (new_active) { |
| bond_set_slave_active_flags(new_active); |
| } |
| } |
| |
| if (USES_PRIMARY(bond->params.mode)) { |
| bond_mc_swap(bond, new_active, old_active); |
| } |
| |
| if ((bond->params.mode == BOND_MODE_TLB) || |
| (bond->params.mode == BOND_MODE_ALB)) { |
| bond_alb_handle_active_change(bond, new_active); |
| } else { |
| bond->curr_active_slave = new_active; |
| } |
| } |
| |
| /** |
| * bond_select_active_slave - select a new active slave, if needed |
| * @bond: our bonding struct |
| * |
| * This functions shoud be called when one of the following occurs: |
| * - The old curr_active_slave has been released or lost its link. |
| * - The primary_slave has got its link back. |
| * - A slave has got its link back and there's no old curr_active_slave. |
| * |
| * Warning: Caller must hold curr_slave_lock for writing. |
| */ |
| static void bond_select_active_slave(struct bonding *bond) |
| { |
| struct slave *best_slave; |
| |
| best_slave = bond_find_best_slave(bond); |
| if (best_slave != bond->curr_active_slave) { |
| bond_change_active_slave(bond, best_slave); |
| } |
| } |
| |
| /*--------------------------- slave list handling ---------------------------*/ |
| |
| /* |
| * This function attaches the slave to the end of list. |
| * |
| * bond->lock held for writing by caller. |
| */ |
| static void bond_attach_slave(struct bonding *bond, struct slave *new_slave) |
| { |
| if (bond->first_slave == NULL) { /* attaching the first slave */ |
| new_slave->next = new_slave; |
| new_slave->prev = new_slave; |
| bond->first_slave = new_slave; |
| } else { |
| new_slave->next = bond->first_slave; |
| new_slave->prev = bond->first_slave->prev; |
| new_slave->next->prev = new_slave; |
| new_slave->prev->next = new_slave; |
| } |
| |
| bond->slave_cnt++; |
| } |
| |
| /* |
| * This function detaches the slave from the list. |
| * WARNING: no check is made to verify if the slave effectively |
| * belongs to <bond>. |
| * Nothing is freed on return, structures are just unchained. |
| * If any slave pointer in bond was pointing to <slave>, |
| * it should be changed by the calling function. |
| * |
| * bond->lock held for writing by caller. |
| */ |
| static void bond_detach_slave(struct bonding *bond, struct slave *slave) |
| { |
| if (slave->next) { |
| slave->next->prev = slave->prev; |
| } |
| |
| if (slave->prev) { |
| slave->prev->next = slave->next; |
| } |
| |
| if (bond->first_slave == slave) { /* slave is the first slave */ |
| if (bond->slave_cnt > 1) { /* there are more slave */ |
| bond->first_slave = slave->next; |
| } else { |
| bond->first_slave = NULL; /* slave was the last one */ |
| } |
| } |
| |
| slave->next = NULL; |
| slave->prev = NULL; |
| bond->slave_cnt--; |
| } |
| |
| /*---------------------------------- IOCTL ----------------------------------*/ |
| |
| static int bond_sethwaddr(struct net_device *bond_dev, struct net_device *slave_dev) |
| { |
| dprintk("bond_dev=%p\n", bond_dev); |
| dprintk("slave_dev=%p\n", slave_dev); |
| dprintk("slave_dev->addr_len=%d\n", slave_dev->addr_len); |
| memcpy(bond_dev->dev_addr, slave_dev->dev_addr, slave_dev->addr_len); |
| return 0; |
| } |
| |
| /* enslave device <slave> to bond device <master> */ |
| static int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev) |
| { |
| struct bonding *bond = bond_dev->priv; |
| struct slave *new_slave = NULL; |
| struct dev_mc_list *dmi; |
| struct sockaddr addr; |
| int link_reporting; |
| int old_features = bond_dev->features; |
| int res = 0; |
| |
| if (slave_dev->do_ioctl == NULL) { |
| printk(KERN_WARNING DRV_NAME |
| ": Warning : no link monitoring support for %s\n", |
| slave_dev->name); |
| } |
| |
| /* bond must be initialized by bond_open() before enslaving */ |
| if (!(bond_dev->flags & IFF_UP)) { |
| dprintk("Error, master_dev is not up\n"); |
| return -EPERM; |
| } |
| |
| /* already enslaved */ |
| if (slave_dev->flags & IFF_SLAVE) { |
| dprintk("Error, Device was already enslaved\n"); |
| return -EBUSY; |
| } |
| |
| /* vlan challenged mutual exclusion */ |
| /* no need to lock since we're protected by rtnl_lock */ |
| if (slave_dev->features & NETIF_F_VLAN_CHALLENGED) { |
| dprintk("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev->name); |
| if (!list_empty(&bond->vlan_list)) { |
| printk(KERN_ERR DRV_NAME |
| ": Error: cannot enslave VLAN " |
| "challenged slave %s on VLAN enabled " |
| "bond %s\n", slave_dev->name, |
| bond_dev->name); |
| return -EPERM; |
| } else { |
| printk(KERN_WARNING DRV_NAME |
| ": Warning: enslaved VLAN challenged " |
| "slave %s. Adding VLANs will be blocked as " |
| "long as %s is part of bond %s\n", |
| slave_dev->name, slave_dev->name, |
| bond_dev->name); |
| bond_dev->features |= NETIF_F_VLAN_CHALLENGED; |
| } |
| } else { |
| dprintk("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev->name); |
| if (bond->slave_cnt == 0) { |
| /* First slave, and it is not VLAN challenged, |
| * so remove the block of adding VLANs over the bond. |
| */ |
| bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED; |
| } |
| } |
| |
| if (app_abi_ver >= 1) { |
| /* The application is using an ABI, which requires the |
| * slave interface to be closed. |
| */ |
| if ((slave_dev->flags & IFF_UP)) { |
| printk(KERN_ERR DRV_NAME |
| ": Error: %s is up\n", |
| slave_dev->name); |
| res = -EPERM; |
| goto err_undo_flags; |
| } |
| |
| if (slave_dev->set_mac_address == NULL) { |
| printk(KERN_ERR DRV_NAME |
| ": Error: The slave device you specified does " |
| "not support setting the MAC address.\n"); |
| printk(KERN_ERR |
| "Your kernel likely does not support slave " |
| "devices.\n"); |
| |
| res = -EOPNOTSUPP; |
| goto err_undo_flags; |
| } |
| } else { |
| /* The application is not using an ABI, which requires the |
| * slave interface to be open. |
| */ |
| if (!(slave_dev->flags & IFF_UP)) { |
| printk(KERN_ERR DRV_NAME |
| ": Error: %s is not running\n", |
| slave_dev->name); |
| res = -EINVAL; |
| goto err_undo_flags; |
| } |
| |
| if ((bond->params.mode == BOND_MODE_8023AD) || |
| (bond->params.mode == BOND_MODE_TLB) || |
| (bond->params.mode == BOND_MODE_ALB)) { |
| printk(KERN_ERR DRV_NAME |
| ": Error: to use %s mode, you must upgrade " |
| "ifenslave.\n", |
| bond_mode_name(bond->params.mode)); |
| res = -EOPNOTSUPP; |
| goto err_undo_flags; |
| } |
| } |
| |
| new_slave = kmalloc(sizeof(struct slave), GFP_KERNEL); |
| if (!new_slave) { |
| res = -ENOMEM; |
| goto err_undo_flags; |
| } |
| |
| memset(new_slave, 0, sizeof(struct slave)); |
| |
| /* save slave's original flags before calling |
| * netdev_set_master and dev_open |
| */ |
| new_slave->original_flags = slave_dev->flags; |
| |
| if (app_abi_ver >= 1) { |
| /* save slave's original ("permanent") mac address for |
| * modes that needs it, and for restoring it upon release, |
| * and then set it to the master's address |
| */ |
| memcpy(new_slave->perm_hwaddr, slave_dev->dev_addr, ETH_ALEN); |
| |
| /* set slave to master's mac address |
| * The application already set the master's |
| * mac address to that of the first slave |
| */ |
| memcpy(addr.sa_data, bond_dev->dev_addr, bond_dev->addr_len); |
| addr.sa_family = slave_dev->type; |
| res = dev_set_mac_address(slave_dev, &addr); |
| if (res) { |
| dprintk("Error %d calling set_mac_address\n", res); |
| goto err_free; |
| } |
| |
| /* open the slave since the application closed it */ |
| res = dev_open(slave_dev); |
| if (res) { |
| dprintk("Openning slave %s failed\n", slave_dev->name); |
| goto err_restore_mac; |
| } |
| } |
| |
| res = netdev_set_master(slave_dev, bond_dev); |
| if (res) { |
| dprintk("Error %d calling netdev_set_master\n", res); |
| if (app_abi_ver < 1) { |
| goto err_free; |
| } else { |
| goto err_close; |
| } |
| } |
| |
| new_slave->dev = slave_dev; |
| |
| if ((bond->params.mode == BOND_MODE_TLB) || |
| (bond->params.mode == BOND_MODE_ALB)) { |
| /* bond_alb_init_slave() must be called before all other stages since |
| * it might fail and we do not want to have to undo everything |
| */ |
| res = bond_alb_init_slave(bond, new_slave); |
| if (res) { |
| goto err_unset_master; |
| } |
| } |
| |
| /* If the mode USES_PRIMARY, then the new slave gets the |
| * master's promisc (and mc) settings only if it becomes the |
| * curr_active_slave, and that is taken care of later when calling |
| * bond_change_active() |
| */ |
| if (!USES_PRIMARY(bond->params.mode)) { |
| /* set promiscuity level to new slave */ |
| if (bond_dev->flags & IFF_PROMISC) { |
| dev_set_promiscuity(slave_dev, 1); |
| } |
| |
| /* set allmulti level to new slave */ |
| if (bond_dev->flags & IFF_ALLMULTI) { |
| dev_set_allmulti(slave_dev, 1); |
| } |
| |
| /* upload master's mc_list to new slave */ |
| for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) { |
| dev_mc_add (slave_dev, dmi->dmi_addr, dmi->dmi_addrlen, 0); |
| } |
| } |
| |
| if (bond->params.mode == BOND_MODE_8023AD) { |
| /* add lacpdu mc addr to mc list */ |
| u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR; |
| |
| dev_mc_add(slave_dev, lacpdu_multicast, ETH_ALEN, 0); |
| } |
| |
| bond_add_vlans_on_slave(bond, slave_dev); |
| |
| write_lock_bh(&bond->lock); |
| |
| bond_attach_slave(bond, new_slave); |
| |
| new_slave->delay = 0; |
| new_slave->link_failure_count = 0; |
| |
| if (bond->params.miimon && !bond->params.use_carrier) { |
| link_reporting = bond_check_dev_link(bond, slave_dev, 1); |
| |
| if ((link_reporting == -1) && !bond->params.arp_interval) { |
| /* |
| * miimon is set but a bonded network driver |
| * does not support ETHTOOL/MII and |
| * arp_interval is not set. Note: if |
| * use_carrier is enabled, we will never go |
| * here (because netif_carrier is always |
| * supported); thus, we don't need to change |
| * the messages for netif_carrier. |
| */ |
| printk(KERN_WARNING DRV_NAME |
| ": Warning: MII and ETHTOOL support not " |
| "available for interface %s, and " |
| "arp_interval/arp_ip_target module parameters " |
| "not specified, thus bonding will not detect " |
| "link failures! see bonding.txt for details.\n", |
| slave_dev->name); |
| } else if (link_reporting == -1) { |
| /* unable get link status using mii/ethtool */ |
| printk(KERN_WARNING DRV_NAME |
| ": Warning: can't get link status from " |
| "interface %s; the network driver associated " |
| "with this interface does not support MII or " |
| "ETHTOOL link status reporting, thus miimon " |
| "has no effect on this interface.\n", |
| slave_dev->name); |
| } |
| } |
| |
| /* check for initial state */ |
| if (!bond->params.miimon || |
| (bond_check_dev_link(bond, slave_dev, 0) == BMSR_LSTATUS)) { |
| if (bond->params.updelay) { |
| dprintk("Initial state of slave_dev is " |
| "BOND_LINK_BACK\n"); |
| new_slave->link = BOND_LINK_BACK; |
| new_slave->delay = bond->params.updelay; |
| } else { |
| dprintk("Initial state of slave_dev is " |
| "BOND_LINK_UP\n"); |
| new_slave->link = BOND_LINK_UP; |
| } |
| new_slave->jiffies = jiffies; |
| } else { |
| dprintk("Initial state of slave_dev is " |
| "BOND_LINK_DOWN\n"); |
| new_slave->link = BOND_LINK_DOWN; |
| } |
| |
| if (bond_update_speed_duplex(new_slave) && |
| (new_slave->link != BOND_LINK_DOWN)) { |
| printk(KERN_WARNING DRV_NAME |
| ": Warning: failed to get speed and duplex from %s, " |
| "assumed to be 100Mb/sec and Full.\n", |
| new_slave->dev->name); |
| |
| if (bond->params.mode == BOND_MODE_8023AD) { |
| printk(KERN_WARNING |
| "Operation of 802.3ad mode requires ETHTOOL " |
| "support in base driver for proper aggregator " |
| "selection.\n"); |
| } |
| } |
| |
| if (USES_PRIMARY(bond->params.mode) && bond->params.primary[0]) { |
| /* if there is a primary slave, remember it */ |
| if (strcmp(bond->params.primary, new_slave->dev->name) == 0) { |
| bond->primary_slave = new_slave; |
| } |
| } |
| |
| switch (bond->params.mode) { |
| case BOND_MODE_ACTIVEBACKUP: |
| /* if we're in active-backup mode, we need one and only one active |
| * interface. The backup interfaces will have their NOARP flag set |
| * because we need them to be completely deaf and not to respond to |
| * any ARP request on the network to avoid fooling a switch. Thus, |
| * since we guarantee that curr_active_slave always point to the last |
| * usable interface, we just have to verify this interface's flag. |
| */ |
| if (((!bond->curr_active_slave) || |
| (bond->curr_active_slave->dev->flags & IFF_NOARP)) && |
| (new_slave->link != BOND_LINK_DOWN)) { |
| dprintk("This is the first active slave\n"); |
| /* first slave or no active slave yet, and this link |
| is OK, so make this interface the active one */ |
| bond_change_active_slave(bond, new_slave); |
| } else { |
| dprintk("This is just a backup slave\n"); |
| bond_set_slave_inactive_flags(new_slave); |
| } |
| break; |
| case BOND_MODE_8023AD: |
| /* in 802.3ad mode, the internal mechanism |
| * will activate the slaves in the selected |
| * aggregator |
| */ |
| bond_set_slave_inactive_flags(new_slave); |
| /* if this is the first slave */ |
| if (bond->slave_cnt == 1) { |
| SLAVE_AD_INFO(new_slave).id = 1; |
| /* Initialize AD with the number of times that the AD timer is called in 1 second |
| * can be called only after the mac address of the bond is set |
| */ |
| bond_3ad_initialize(bond, 1000/AD_TIMER_INTERVAL, |
| bond->params.lacp_fast); |
| } else { |
| SLAVE_AD_INFO(new_slave).id = |
| SLAVE_AD_INFO(new_slave->prev).id + 1; |
| } |
| |
| bond_3ad_bind_slave(new_slave); |
| break; |
| case BOND_MODE_TLB: |
| case BOND_MODE_ALB: |
| new_slave->state = BOND_STATE_ACTIVE; |
| if ((!bond->curr_active_slave) && |
| (new_slave->link != BOND_LINK_DOWN)) { |
| /* first slave or no active slave yet, and this link |
| * is OK, so make this interface the active one |
| */ |
| bond_change_active_slave(bond, new_slave); |
| } |
| break; |
| default: |
| dprintk("This slave is always active in trunk mode\n"); |
| |
| /* always active in trunk mode */ |
| new_slave->state = BOND_STATE_ACTIVE; |
| |
| /* In trunking mode there is little meaning to curr_active_slave |
| * anyway (it holds no special properties of the bond device), |
| * so we can change it without calling change_active_interface() |
| */ |
| if (!bond->curr_active_slave) { |
| bond->curr_active_slave = new_slave; |
| } |
| break; |
| } /* switch(bond_mode) */ |
| |
| write_unlock_bh(&bond->lock); |
| |
| if (app_abi_ver < 1) { |
| /* |
| * !!! This is to support old versions of ifenslave. |
| * We can remove this in 2.5 because our ifenslave takes |
| * care of this for us. |
| * We check to see if the master has a mac address yet. |
| * If not, we'll give it the mac address of our slave device. |
| */ |
| int ndx = 0; |
| |
| for (ndx = 0; ndx < bond_dev->addr_len; ndx++) { |
| dprintk("Checking ndx=%d of bond_dev->dev_addr\n", |
| ndx); |
| if (bond_dev->dev_addr[ndx] != 0) { |
| dprintk("Found non-zero byte at ndx=%d\n", |
| ndx); |
| break; |
| } |
| } |
| |
| if (ndx == bond_dev->addr_len) { |
| /* |
| * We got all the way through the address and it was |
| * all 0's. |
| */ |
| dprintk("%s doesn't have a MAC address yet. \n", |
| bond_dev->name); |
| dprintk("Going to give assign it from %s.\n", |
| slave_dev->name); |
| bond_sethwaddr(bond_dev, slave_dev); |
| } |
| } |
| |
| printk(KERN_INFO DRV_NAME |
| ": %s: enslaving %s as a%s interface with a%s link.\n", |
| bond_dev->name, slave_dev->name, |
| new_slave->state == BOND_STATE_ACTIVE ? "n active" : " backup", |
| new_slave->link != BOND_LINK_DOWN ? "n up" : " down"); |
| |
| /* enslave is successful */ |
| return 0; |
| |
| /* Undo stages on error */ |
| err_unset_master: |
| netdev_set_master(slave_dev, NULL); |
| |
| err_close: |
| dev_close(slave_dev); |
| |
| err_restore_mac: |
| memcpy(addr.sa_data, new_slave->perm_hwaddr, ETH_ALEN); |
| addr.sa_family = slave_dev->type; |
| dev_set_mac_address(slave_dev, &addr); |
| |
| err_free: |
| kfree(new_slave); |
| |
| err_undo_flags: |
| bond_dev->features = old_features; |
| |
| return res; |
| } |
| |
| /* |
| * Try to release the slave device <slave> from the bond device <master> |
| * It is legal to access curr_active_slave without a lock because all the function |
| * is write-locked. |
| * |
| * The rules for slave state should be: |
| * for Active/Backup: |
| * Active stays on all backups go down |
| * for Bonded connections: |
| * The first up interface should be left on and all others downed. |
| */ |
| static int bond_release(struct net_device *bond_dev, struct net_device *slave_dev) |
| { |
| struct bonding *bond = bond_dev->priv; |
| struct slave *slave, *oldcurrent; |
| struct sockaddr addr; |
| int mac_addr_differ; |
| |
| /* slave is not a slave or master is not master of this slave */ |
| if (!(slave_dev->flags & IFF_SLAVE) || |
| (slave_dev->master != bond_dev)) { |
| printk(KERN_ERR DRV_NAME |
| ": Error: %s: cannot release %s.\n", |
| bond_dev->name, slave_dev->name); |
| return -EINVAL; |
| } |
| |
| write_lock_bh(&bond->lock); |
| |
| slave = bond_get_slave_by_dev(bond, slave_dev); |
| if (!slave) { |
| /* not a slave of this bond */ |
| printk(KERN_INFO DRV_NAME |
| ": %s: %s not enslaved\n", |
| bond_dev->name, slave_dev->name); |
| return -EINVAL; |
| } |
| |
| mac_addr_differ = memcmp(bond_dev->dev_addr, |
| slave->perm_hwaddr, |
| ETH_ALEN); |
| if (!mac_addr_differ && (bond->slave_cnt > 1)) { |
| printk(KERN_WARNING DRV_NAME |
| ": Warning: the permanent HWaddr of %s " |
| "- %02X:%02X:%02X:%02X:%02X:%02X - is " |
| "still in use by %s. Set the HWaddr of " |
| "%s to a different address to avoid " |
| "conflicts.\n", |
| slave_dev->name, |
| slave->perm_hwaddr[0], |
| slave->perm_hwaddr[1], |
| slave->perm_hwaddr[2], |
| slave->perm_hwaddr[3], |
| slave->perm_hwaddr[4], |
| slave->perm_hwaddr[5], |
| bond_dev->name, |
| slave_dev->name); |
| } |
| |
| /* Inform AD package of unbinding of slave. */ |
| if (bond->params.mode == BOND_MODE_8023AD) { |
| /* must be called before the slave is |
| * detached from the list |
| */ |
| bond_3ad_unbind_slave(slave); |
| } |
| |
| printk(KERN_INFO DRV_NAME |
| ": %s: releasing %s interface %s\n", |
| bond_dev->name, |
| (slave->state == BOND_STATE_ACTIVE) |
| ? "active" : "backup", |
| slave_dev->name); |
| |
| oldcurrent = bond->curr_active_slave; |
| |
| bond->current_arp_slave = NULL; |
| |
| /* release the slave from its bond */ |
| bond_detach_slave(bond, slave); |
| |
| if (bond->primary_slave == slave) { |
| bond->primary_slave = NULL; |
| } |
| |
| if (oldcurrent == slave) { |
| bond_change_active_slave(bond, NULL); |
| } |
| |
| if ((bond->params.mode == BOND_MODE_TLB) || |
| (bond->params.mode == BOND_MODE_ALB)) { |
| /* Must be called only after the slave has been |
| * detached from the list and the curr_active_slave |
| * has been cleared (if our_slave == old_current), |
| * but before a new active slave is selected. |
| */ |
| bond_alb_deinit_slave(bond, slave); |
| } |
| |
| if (oldcurrent == slave) { |
| bond_select_active_slave(bond); |
| |
| if (!bond->curr_active_slave) { |
| printk(KERN_INFO DRV_NAME |
| ": %s: now running without any active " |
| "interface !\n", |
| bond_dev->name); |
| } |
| } |
| |
| if (bond->slave_cnt == 0) { |
| /* if the last slave was removed, zero the mac address |
| * of the master so it will be set by the application |
| * to the mac address of the first slave |
| */ |
| memset(bond_dev->dev_addr, 0, bond_dev->addr_len); |
| |
| if (list_empty(&bond->vlan_list)) { |
| bond_dev->features |= NETIF_F_VLAN_CHALLENGED; |
| } else { |
| printk(KERN_WARNING DRV_NAME |
| ": Warning: clearing HW address of %s while it " |
| "still has VLANs.\n", |
| bond_dev->name); |
| printk(KERN_WARNING DRV_NAME |
| ": When re-adding slaves, make sure the bond's " |
| "HW address matches its VLANs'.\n"); |
| } |
| } else if ((bond_dev->features & NETIF_F_VLAN_CHALLENGED) && |
| !bond_has_challenged_slaves(bond)) { |
| printk(KERN_INFO DRV_NAME |
| ": last VLAN challenged slave %s " |
| "left bond %s. VLAN blocking is removed\n", |
| slave_dev->name, bond_dev->name); |
| bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED; |
| } |
| |
| write_unlock_bh(&bond->lock); |
| |
| bond_del_vlans_from_slave(bond, slave_dev); |
| |
| /* If the mode USES_PRIMARY, then we should only remove its |
| * promisc and mc settings if it was the curr_active_slave, but that was |
| * already taken care of above when we detached the slave |
| */ |
| if (!USES_PRIMARY(bond->params.mode)) { |
| /* unset promiscuity level from slave */ |
| if (bond_dev->flags & IFF_PROMISC) { |
| dev_set_promiscuity(slave_dev, -1); |
| } |
| |
| /* unset allmulti level from slave */ |
| if (bond_dev->flags & IFF_ALLMULTI) { |
| dev_set_allmulti(slave_dev, -1); |
| } |
| |
| /* flush master's mc_list from slave */ |
| bond_mc_list_flush(bond_dev, slave_dev); |
| } |
| |
| netdev_set_master(slave_dev, NULL); |
| |
| /* close slave before restoring its mac address */ |
| dev_close(slave_dev); |
| |
| if (app_abi_ver >= 1) { |
| /* restore original ("permanent") mac address */ |
| memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN); |
| addr.sa_family = slave_dev->type; |
| dev_set_mac_address(slave_dev, &addr); |
| } |
| |
| /* restore the original state of the |
| * IFF_NOARP flag that might have been |
| * set by bond_set_slave_inactive_flags() |
| */ |
| if ((slave->original_flags & IFF_NOARP) == 0) { |
| slave_dev->flags &= ~IFF_NOARP; |
| } |
| |
| kfree(slave); |
| |
| return 0; /* deletion OK */ |
| } |
| |
| /* |
| * This function releases all slaves. |
| */ |
| static int bond_release_all(struct net_device *bond_dev) |
| { |
| struct bonding *bond = bond_dev->priv; |
| struct slave *slave; |
| struct net_device *slave_dev; |
| struct sockaddr addr; |
| |
| write_lock_bh(&bond->lock); |
| |
| if (bond->slave_cnt == 0) { |
| goto out; |
| } |
| |
| bond->current_arp_slave = NULL; |
| bond->primary_slave = NULL; |
| bond_change_active_slave(bond, NULL); |
| |
| while ((slave = bond->first_slave) != NULL) { |
| /* Inform AD package of unbinding of slave |
| * before slave is detached from the list. |
| */ |
| if (bond->params.mode == BOND_MODE_8023AD) { |
| bond_3ad_unbind_slave(slave); |
| } |
| |
| slave_dev = slave->dev; |
| bond_detach_slave(bond, slave); |
| |
| if ((bond->params.mode == BOND_MODE_TLB) || |
| (bond->params.mode == BOND_MODE_ALB)) { |
| /* must be called only after the slave |
| * has been detached from the list |
| */ |
| bond_alb_deinit_slave(bond, slave); |
| } |
| |
| /* now that the slave is detached, unlock and perform |
| * all the undo steps that should not be called from |
| * within a lock. |
| */ |
| write_unlock_bh(&bond->lock); |
| |
| bond_del_vlans_from_slave(bond, slave_dev); |
| |
| /* If the mode USES_PRIMARY, then we should only remove its |
| * promisc and mc settings if it was the curr_active_slave, but that was |
| * already taken care of above when we detached the slave |
| */ |
| if (!USES_PRIMARY(bond->params.mode)) { |
| /* unset promiscuity level from slave */ |
| if (bond_dev->flags & IFF_PROMISC) { |
| dev_set_promiscuity(slave_dev, -1); |
| } |
| |
| /* unset allmulti level from slave */ |
| if (bond_dev->flags & IFF_ALLMULTI) { |
| dev_set_allmulti(slave_dev, -1); |
| } |
| |
| /* flush master's mc_list from slave */ |
| bond_mc_list_flush(bond_dev, slave_dev); |
| } |
| |
| netdev_set_master(slave_dev, NULL); |
| |
| /* close slave before restoring its mac address */ |
| dev_close(slave_dev); |
| |
| if (app_abi_ver >= 1) { |
| /* restore original ("permanent") mac address*/ |
| memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN); |
| addr.sa_family = slave_dev->type; |
| dev_set_mac_address(slave_dev, &addr); |
| } |
| |
| /* restore the original state of the IFF_NOARP flag that might have |
| * been set by bond_set_slave_inactive_flags() |
| */ |
| if ((slave->original_flags & IFF_NOARP) == 0) { |
| slave_dev->flags &= ~IFF_NOARP; |
| } |
| |
| kfree(slave); |
| |
| /* re-acquire the lock before getting the next slave */ |
| write_lock_bh(&bond->lock); |
| } |
| |
| /* zero the mac address of the master so it will be |
| * set by the application to the mac address of the |
| * first slave |
| */ |
| memset(bond_dev->dev_addr, 0, bond_dev->addr_len); |
| |
| if (list_empty(&bond->vlan_list)) { |
| bond_dev->features |= NETIF_F_VLAN_CHALLENGED; |
| } else { |
| printk(KERN_WARNING DRV_NAME |
| ": Warning: clearing HW address of %s while it " |
| "still has VLANs.\n", |
| bond_dev->name); |
| printk(KERN_WARNING DRV_NAME |
| ": When re-adding slaves, make sure the bond's " |
| "HW address matches its VLANs'.\n"); |
| } |
| |
| printk(KERN_INFO DRV_NAME |
| ": %s: released all slaves\n", |
| bond_dev->name); |
| |
| out: |
| write_unlock_bh(&bond->lock); |
| |
| return 0; |
| } |
| |
| /* |
| * This function changes the active slave to slave <slave_dev>. |
| * It returns -EINVAL in the following cases. |
| * - <slave_dev> is not found in the list. |
| * - There is not active slave now. |
| * - <slave_dev> is already active. |
| * - The link state of <slave_dev> is not BOND_LINK_UP. |
| * - <slave_dev> is not running. |
| * In these cases, this fuction does nothing. |
| * In the other cases, currnt_slave pointer is changed and 0 is returned. |
| */ |
| static int bond_ioctl_change_active(struct net_device *bond_dev, struct net_device *slave_dev) |
| { |
| struct bonding *bond = bond_dev->priv; |
| struct slave *old_active = NULL; |
| struct slave *new_active = NULL; |
| int res = 0; |
| |
| if (!USES_PRIMARY(bond->params.mode)) { |
| return -EINVAL; |
| } |
| |
| /* Verify that master_dev is indeed the master of slave_dev */ |
| if (!(slave_dev->flags & IFF_SLAVE) || |
| (slave_dev->master != bond_dev)) { |
| return -EINVAL; |
| } |
| |
| write_lock_bh(&bond->lock); |
| |
| old_active = bond->curr_active_slave; |
| new_active = bond_get_slave_by_dev(bond, slave_dev); |
| |
| /* |
| * Changing to the current active: do nothing; return success. |
| */ |
| if (new_active && (new_active == old_active)) { |
| write_unlock_bh(&bond->lock); |
| return 0; |
| } |
| |
| if ((new_active) && |
| (old_active) && |
| (new_active->link == BOND_LINK_UP) && |
| IS_UP(new_active->dev)) { |
| bond_change_active_slave(bond, new_active); |
| } else { |
| res = -EINVAL; |
| } |
| |
| write_unlock_bh(&bond->lock); |
| |
| return res; |
| } |
| |
| static int bond_ethtool_ioctl(struct net_device *bond_dev, struct ifreq *ifr) |
| { |
| struct ethtool_drvinfo info; |
| void __user *addr = ifr->ifr_data; |
| uint32_t cmd; |
| |
| if (get_user(cmd, (uint32_t __user *)addr)) { |
| return -EFAULT; |
| } |
| |
| switch (cmd) { |
| case ETHTOOL_GDRVINFO: |
| if (copy_from_user(&info, addr, sizeof(info))) { |
| return -EFAULT; |
| } |
| |
| if (strcmp(info.driver, "ifenslave") == 0) { |
| int new_abi_ver; |
| char *endptr; |
| |
| new_abi_ver = simple_strtoul(info.fw_version, |
| &endptr, 0); |
| if (*endptr) { |
| printk(KERN_ERR DRV_NAME |
| ": Error: got invalid ABI " |
| "version from application\n"); |
| |
| return -EINVAL; |
| } |
| |
| if (orig_app_abi_ver == -1) { |
| orig_app_abi_ver = new_abi_ver; |
| } |
| |
| app_abi_ver = new_abi_ver; |
| } |
| |
| strncpy(info.driver, DRV_NAME, 32); |
| strncpy(info.version, DRV_VERSION, 32); |
| snprintf(info.fw_version, 32, "%d", BOND_ABI_VERSION); |
| |
| if (copy_to_user(addr, &info, sizeof(info))) { |
| return -EFAULT; |
| } |
| |
| return 0; |
| default: |
| return -EOPNOTSUPP; |
| } |
| } |
| |
| static int bond_info_query(struct net_device *bond_dev, struct ifbond *info) |
| { |
| struct bonding *bond = bond_dev->priv; |
| |
| info->bond_mode = bond->params.mode; |
| info->miimon = bond->params.miimon; |
| |
| read_lock_bh(&bond->lock); |
| info->num_slaves = bond->slave_cnt; |
| read_unlock_bh(&bond->lock); |
| |
| return 0; |
| } |
| |
| static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *info) |
| { |
| struct bonding *bond = bond_dev->priv; |
| struct slave *slave; |
| int i, found = 0; |
| |
| if (info->slave_id < 0) { |
| return -ENODEV; |
| } |
| |
| read_lock_bh(&bond->lock); |
| |
| bond_for_each_slave(bond, slave, i) { |
| if (i == (int)info->slave_id) { |
| found = 1; |
| break; |
| } |
| } |
| |
| read_unlock_bh(&bond->lock); |
| |
| if (found) { |
| strcpy(info->slave_name, slave->dev->name); |
| info->link = slave->link; |
| info->state = slave->state; |
| info->link_failure_count = slave->link_failure_count; |
| } else { |
| return -ENODEV; |
| } |
| |
| return 0; |
| } |
| |
| /*-------------------------------- Monitoring -------------------------------*/ |
| |
| /* this function is called regularly to monitor each slave's link. */ |
| static void bond_mii_monitor(struct net_device *bond_dev) |
| { |
| struct bonding *bond = bond_dev->priv; |
| struct slave *slave, *oldcurrent; |
| int do_failover = 0; |
| int delta_in_ticks; |
| int i; |
| |
| read_lock(&bond->lock); |
| |
| delta_in_ticks = (bond->params.miimon * HZ) / 1000; |
| |
| if (bond->kill_timers) { |
| goto out; |
| } |
| |
| if (bond->slave_cnt == 0) { |
| goto re_arm; |
| } |
| |
| /* we will try to read the link status of each of our slaves, and |
| * set their IFF_RUNNING flag appropriately. For each slave not |
| * supporting MII status, we won't do anything so that a user-space |
| * program could monitor the link itself if needed. |
| */ |
| |
| read_lock(&bond->curr_slave_lock); |
| oldcurrent = bond->curr_active_slave; |
| read_unlock(&bond->curr_slave_lock); |
| |
| bond_for_each_slave(bond, slave, i) { |
| struct net_device *slave_dev = slave->dev; |
| int link_state; |
| u16 old_speed = slave->speed; |
| u8 old_duplex = slave->duplex; |
| |
| link_state = bond_check_dev_link(bond, slave_dev, 0); |
| |
| switch (slave->link) { |
| case BOND_LINK_UP: /* the link was up */ |
| if (link_state == BMSR_LSTATUS) { |
| /* link stays up, nothing more to do */ |
| break; |
| } else { /* link going down */ |
| slave->link = BOND_LINK_FAIL; |
| slave->delay = bond->params.downdelay; |
| |
| if (slave->link_failure_count < UINT_MAX) { |
| slave->link_failure_count++; |
| } |
| |
| if (bond->params.downdelay) { |
| printk(KERN_INFO DRV_NAME |
| ": %s: link status down for %s " |
| "interface %s, disabling it in " |
| "%d ms.\n", |
| bond_dev->name, |
| IS_UP(slave_dev) |
| ? ((bond->params.mode == BOND_MODE_ACTIVEBACKUP) |
| ? ((slave == oldcurrent) |
| ? "active " : "backup ") |
| : "") |
| : "idle ", |
| slave_dev->name, |
| bond->params.downdelay * bond->params.miimon); |
| } |
| } |
| /* no break ! fall through the BOND_LINK_FAIL test to |
| ensure proper action to be taken |
| */ |
| case BOND_LINK_FAIL: /* the link has just gone down */ |
| if (link_state != BMSR_LSTATUS) { |
| /* link stays down */ |
| if (slave->delay <= 0) { |
| /* link down for too long time */ |
| slave->link = BOND_LINK_DOWN; |
| |
| /* in active/backup mode, we must |
| * completely disable this interface |
| */ |
| if ((bond->params.mode == BOND_MODE_ACTIVEBACKUP) || |
| (bond->params.mode == BOND_MODE_8023AD)) { |
| bond_set_slave_inactive_flags(slave); |
| } |
| |
| printk(KERN_INFO DRV_NAME |
| ": %s: link status definitely " |
| "down for interface %s, " |
| "disabling it\n", |
| bond_dev->name, |
| slave_dev->name); |
| |
| /* notify ad that the link status has changed */ |
| if (bond->params.mode == BOND_MODE_8023AD) { |
| bond_3ad_handle_link_change(slave, BOND_LINK_DOWN); |
| } |
| |
| if ((bond->params.mode == BOND_MODE_TLB) || |
| (bond->params.mode == BOND_MODE_ALB)) { |
| bond_alb_handle_link_change(bond, slave, BOND_LINK_DOWN); |
| } |
| |
| if (slave == oldcurrent) { |
| do_failover = 1; |
| } |
| } else { |
| slave->delay--; |
| } |
| } else { |
| /* link up again */ |
| slave->link = BOND_LINK_UP; |
| slave->jiffies = jiffies; |
| printk(KERN_INFO DRV_NAME |
| ": %s: link status up again after %d " |
| "ms for interface %s.\n", |
| bond_dev->name, |
| (bond->params.downdelay - slave->delay) * bond->params.miimon, |
| slave_dev->name); |
| } |
| break; |
| case BOND_LINK_DOWN: /* the link was down */ |
| if (link_state != BMSR_LSTATUS) { |
| /* the link stays down, nothing more to do */ |
| break; |
| } else { /* link going up */ |
| slave->link = BOND_LINK_BACK; |
| slave->delay = bond->params.updelay; |
| |
| if (bond->params.updelay) { |
| /* if updelay == 0, no need to |
| advertise about a 0 ms delay */ |
| printk(KERN_INFO DRV_NAME |
| ": %s: link status up for " |
| "interface %s, enabling it " |
| "in %d ms.\n", |
| bond_dev->name, |
| slave_dev->name, |
| bond->params.updelay * bond->params.miimon); |
| } |
| } |
| /* no break ! fall through the BOND_LINK_BACK state in |
| case there's something to do. |
| */ |
| case BOND_LINK_BACK: /* the link has just come back */ |
| if (link_state != BMSR_LSTATUS) { |
| /* link down again */ |
| slave->link = BOND_LINK_DOWN; |
| |
| printk(KERN_INFO DRV_NAME |
| ": %s: link status down again after %d " |
| "ms for interface %s.\n", |
| bond_dev->name, |
| (bond->params.updelay - slave->delay) * bond->params.miimon, |
| slave_dev->name); |
| } else { |
| /* link stays up */ |
| if (slave->delay == 0) { |
| /* now the link has been up for long time enough */ |
| slave->link = BOND_LINK_UP; |
| slave->jiffies = jiffies; |
| |
| if (bond->params.mode == BOND_MODE_8023AD) { |
| /* prevent it from being the active one */ |
| slave->state = BOND_STATE_BACKUP; |
| } else if (bond->params.mode != BOND_MODE_ACTIVEBACKUP) { |
| /* make it immediately active */ |
| slave->state = BOND_STATE_ACTIVE; |
| } else if (slave != bond->primary_slave) { |
| /* prevent it from being the active one */ |
| slave->state = BOND_STATE_BACKUP; |
| } |
| |
| printk(KERN_INFO DRV_NAME |
| ": %s: link status definitely " |
| "up for interface %s.\n", |
| bond_dev->name, |
| slave_dev->name); |
| |
| /* notify ad that the link status has changed */ |
| if (bond->params.mode == BOND_MODE_8023AD) { |
| bond_3ad_handle_link_change(slave, BOND_LINK_UP); |
| } |
| |
| if ((bond->params.mode == BOND_MODE_TLB) || |
| (bond->params.mode == BOND_MODE_ALB)) { |
| bond_alb_handle_link_change(bond, slave, BOND_LINK_UP); |
| } |
| |
| if ((!oldcurrent) || |
| (slave == bond->primary_slave)) { |
| do_failover = 1; |
| } |
| } else { |
| slave->delay--; |
| } |
| } |
| break; |
| default: |
| /* Should not happen */ |
| printk(KERN_ERR "bonding: Error: %s Illegal value (link=%d)\n", |
| slave->dev->name, slave->link); |
| goto out; |
| } /* end of switch (slave->link) */ |
| |
| bond_update_speed_duplex(slave); |
| |
| if (bond->params.mode == BOND_MODE_8023AD) { |
| if (old_speed != slave->speed) { |
| bond_3ad_adapter_speed_changed(slave); |
| } |
| |
| if (old_duplex != slave->duplex) { |
| bond_3ad_adapter_duplex_changed(slave); |
| } |
| } |
| |
| } /* end of for */ |
| |
| if (do_failover) { |
| write_lock(&bond->curr_slave_lock); |
| |
| bond_select_active_slave(bond); |
| |
| if (oldcurrent && !bond->curr_active_slave) { |
| printk(KERN_INFO DRV_NAME |
| ": %s: now running without any active " |
| "interface !\n", |
| bond_dev->name); |
| } |
| |
| write_unlock(&bond->curr_slave_lock); |
| } |
| |
| re_arm: |
| if (bond->params.miimon) { |
| mod_timer(&bond->mii_timer, jiffies + delta_in_ticks); |
| } |
| out: |
| read_unlock(&bond->lock); |
| } |
| |
| static void bond_arp_send_all(struct bonding *bond, struct slave *slave) |
| { |
| int i; |
| u32 *targets = bond->params.arp_targets; |
| |
| for (i = 0; (i < BOND_MAX_ARP_TARGETS) && targets[i]; i++) { |
| arp_send(ARPOP_REQUEST, ETH_P_ARP, targets[i], slave->dev, |
| my_ip, NULL, slave->dev->dev_addr, |
| NULL); |
| } |
| } |
| |
| /* |
| * this function is called regularly to monitor each slave's link |
| * ensuring that traffic is being sent and received when arp monitoring |
| * is used in load-balancing mode. if the adapter has been dormant, then an |
| * arp is transmitted to generate traffic. see activebackup_arp_monitor for |
| * arp monitoring in active backup mode. |
| */ |
| static void bond_loadbalance_arp_mon(struct net_device *bond_dev) |
| { |
| struct bonding *bond = bond_dev->priv; |
| struct slave *slave, *oldcurrent; |
| int do_failover = 0; |
| int delta_in_ticks; |
| int i; |
| |
| read_lock(&bond->lock); |
| |
| delta_in_ticks = (bond->params.arp_interval * HZ) / 1000; |
| |
| if (bond->kill_timers) { |
| goto out; |
| } |
| |
| if (bond->slave_cnt == 0) { |
| goto re_arm; |
| } |
| |
| read_lock(&bond->curr_slave_lock); |
| oldcurrent = bond->curr_active_slave; |
| read_unlock(&bond->curr_slave_lock); |
| |
| /* see if any of the previous devices are up now (i.e. they have |
| * xmt and rcv traffic). the curr_active_slave does not come into |
| * the picture unless it is null. also, slave->jiffies is not needed |
| * here because we send an arp on each slave and give a slave as |
| * long as it needs to get the tx/rx within the delta. |
| * TODO: what about up/down delay in arp mode? it wasn't here before |
| * so it can wait |
| */ |
| bond_for_each_slave(bond, slave, i) { |
| if (slave->link != BOND_LINK_UP) { |
| if (((jiffies - slave->dev->trans_start) <= delta_in_ticks) && |
| ((jiffies - slave->dev->last_rx) <= delta_in_ticks)) { |
| |
| slave->link = BOND_LINK_UP; |
| slave->state = BOND_STATE_ACTIVE; |
| |
| /* primary_slave has no meaning in round-robin |
| * mode. the window of a slave being up and |
| * curr_active_slave being null after enslaving |
| * is closed. |
| */ |
| if (!oldcurrent) { |
| printk(KERN_INFO DRV_NAME |
| ": %s: link status definitely " |
| "up for interface %s, ", |
| bond_dev->name, |
| slave->dev->name); |
| do_failover = 1; |
| } else { |
| printk(KERN_INFO DRV_NAME |
| ": %s: interface %s is now up\n", |
| bond_dev->name, |
| slave->dev->name); |
| } |
| } |
| } else { |
| /* slave->link == BOND_LINK_UP */ |
| |
| /* not all switches will respond to an arp request |
| * when the source ip is 0, so don't take the link down |
| * if we don't know our ip yet |
| */ |
| if (((jiffies - slave->dev->trans_start) >= (2*delta_in_ticks)) || |
| (((jiffies - slave->dev->last_rx) >= (2*delta_in_ticks)) && |
| my_ip)) { |
| |
| slave->link = BOND_LINK_DOWN; |
| slave->state = BOND_STATE_BACKUP; |
| |
| if (slave->link_failure_count < UINT_MAX) { |
| slave->link_failure_count++; |
| } |
| |
| printk(KERN_INFO DRV_NAME |
| ": %s: interface %s is now down.\n", |
| bond_dev->name, |
| slave->dev->name); |
| |
| if (slave == oldcurrent) { |
| do_failover = 1; |
| } |
| } |
| } |
| |
| /* note: if switch is in round-robin mode, all links |
| * must tx arp to ensure all links rx an arp - otherwise |
| * links may oscillate or not come up at all; if switch is |
| * in something like xor mode, there is nothing we can |
| * do - all replies will be rx'ed on same link causing slaves |
| * to be unstable during low/no traffic periods |
| */ |
| if (IS_UP(slave->dev)) { |
| bond_arp_send_all(bond, slave); |
| } |
| } |
| |
| if (do_failover) { |
| write_lock(&bond->curr_slave_lock); |
| |
| bond_select_active_slave(bond); |
| |
| if (oldcurrent && !bond->curr_active_slave) { |
| printk(KERN_INFO DRV_NAME |
| ": %s: now running without any active " |
| "interface !\n", |
| bond_dev->name); |
| } |
| |
| write_unlock(&bond->curr_slave_lock); |
| } |
| |
| re_arm: |
| if (bond->params.arp_interval) { |
| mod_timer(&bond->arp_timer, jiffies + delta_in_ticks); |
| } |
| out: |
| read_unlock(&bond->lock); |
| } |
| |
| /* |
| * When using arp monitoring in active-backup mode, this function is |
| * called to determine if any backup slaves have went down or a new |
| * current slave needs to be found. |
| * The backup slaves never generate traffic, they are considered up by merely |
| * receiving traffic. If the current slave goes down, each backup slave will |
| * be given the opportunity to tx/rx an arp before being taken down - this |
| * prevents all slaves from being taken down due to the current slave not |
| * sending any traffic for the backups to receive. The arps are not necessarily |
| * necessary, any tx and rx traffic will keep the current slave up. While any |
| * rx traffic will keep the backup slaves up, the current slave is responsible |
| * for generating traffic to keep them up regardless of any other traffic they |
| * may have received. |
| * see loadbalance_arp_monitor for arp monitoring in load balancing mode |
| */ |
| static void bond_activebackup_arp_mon(struct net_device *bond_dev) |
| { |
| struct bonding *bond = bond_dev->priv; |
| struct slave *slave; |
| int delta_in_ticks; |
| int i; |
| |
| read_lock(&bond->lock); |
| |
| delta_in_ticks = (bond->params.arp_interval * HZ) / 1000; |
| |
| if (bond->kill_timers) { |
| goto out; |
| } |
| |
| if (bond->slave_cnt == 0) { |
| goto re_arm; |
| } |
| |
| /* determine if any slave has come up or any backup slave has |
| * gone down |
| * TODO: what about up/down delay in arp mode? it wasn't here before |
| * so it can wait |
| */ |
| bond_for_each_slave(bond, slave, i) { |
| if (slave->link != BOND_LINK_UP) { |
| if ((jiffies - slave->dev->last_rx) <= delta_in_ticks) { |
| |
| slave->link = BOND_LINK_UP; |
| |
| write_lock(&bond->curr_slave_lock); |
| |
| if ((!bond->curr_active_slave) && |
| ((jiffies - slave->dev->trans_start) <= delta_in_ticks)) { |
| bond_change_active_slave(bond, slave); |
| bond->current_arp_slave = NULL; |
| } else if (bond->curr_active_slave != slave) { |
| /* this slave has just come up but we |
| * already have a current slave; this |
| * can also happen if bond_enslave adds |
| * a new slave that is up while we are |
| * searching for a new slave |
| */ |
| bond_set_slave_inactive_flags(slave); |
| bond->current_arp_slave = NULL; |
| } |
| |
| if (slave == bond->curr_active_slave) { |
| printk(KERN_INFO DRV_NAME |
| ": %s: %s is up and now the " |
| "active interface\n", |
| bond_dev->name, |
| slave->dev->name); |
| } else { |
| printk(KERN_INFO DRV_NAME |
| ": %s: backup interface %s is " |
| "now up\n", |
| bond_dev->name, |
| slave->dev->name); |
| } |
| |
| write_unlock(&bond->curr_slave_lock); |
| } |
| } else { |
| read_lock(&bond->curr_slave_lock); |
| |
| if ((slave != bond->curr_active_slave) && |
| (!bond->current_arp_slave) && |
| (((jiffies - slave->dev->last_rx) >= 3*delta_in_ticks) && |
| my_ip)) { |
| /* a backup slave has gone down; three times |
| * the delta allows the current slave to be |
| * taken out before the backup slave. |
| * note: a non-null current_arp_slave indicates |
| * the curr_active_slave went down and we are |
| * searching for a new one; under this |
| * condition we only take the curr_active_slave |
| * down - this gives each slave a chance to |
| * tx/rx traffic before being taken out |
| */ |
| |
| read_unlock(&bond->curr_slave_lock); |
| |
| slave->link = BOND_LINK_DOWN; |
| |
| if (slave->link_failure_count < UINT_MAX) { |
| slave->link_failure_count++; |
| } |
| |
| bond_set_slave_inactive_flags(slave); |
| |
| printk(KERN_INFO DRV_NAME |
| ": %s: backup interface %s is now down\n", |
| bond_dev->name, |
| slave->dev->name); |
| } else { |
| read_unlock(&bond->curr_slave_lock); |
| } |
| } |
| } |
| |
| read_lock(&bond->curr_slave_lock); |
| slave = bond->curr_active_slave; |
| read_unlock(&bond->curr_slave_lock); |
| |
| if (slave) { |
| /* if we have sent traffic in the past 2*arp_intervals but |
| * haven't xmit and rx traffic in that time interval, select |
| * a different slave. slave->jiffies is only updated when |
| * a slave first becomes the curr_active_slave - not necessarily |
| * after every arp; this ensures the slave has a full 2*delta |
| * before being taken out. if a primary is being used, check |
| * if it is up and needs to take over as the curr_active_slave |
| */ |
| if ((((jiffies - slave->dev->trans_start) >= (2*delta_in_ticks)) || |
| (((jiffies - slave->dev->last_rx) >= (2*delta_in_ticks)) && |
| my_ip)) && |
| ((jiffies - slave->jiffies) >= 2*delta_in_ticks)) { |
| |
| slave->link = BOND_LINK_DOWN; |
| |
| if (slave->link_failure_count < UINT_MAX) { |
| slave->link_failure_count++; |
| } |
| |
| printk(KERN_INFO DRV_NAME |
| ": %s: link status down for active interface " |
| "%s, disabling it\n", |
| bond_dev->name, |
| slave->dev->name); |
| |
| write_lock(&bond->curr_slave_lock); |
| |
| bond_select_active_slave(bond); |
| slave = bond->curr_active_slave; |
| |
| write_unlock(&bond->curr_slave_lock); |
| |
| bond->current_arp_slave = slave; |
| |
| if (slave) { |
| slave->jiffies = jiffies; |
| } |
| } else if ((bond->primary_slave) && |
| (bond->primary_slave != slave) && |
| (bond->primary_slave->link == BOND_LINK_UP)) { |
| /* at this point, slave is the curr_active_slave */ |
| printk(KERN_INFO DRV_NAME |
| ": %s: changing from interface %s to primary " |
| "interface %s\n", |
| bond_dev->name, |
| slave->dev->name, |
| bond->primary_slave->dev->name); |
| |
| /* primary is up so switch to it */ |
| write_lock(&bond->curr_slave_lock); |
| bond_change_active_slave(bond, bond->primary_slave); |
| write_unlock(&bond->curr_slave_lock); |
| |
| slave = bond->primary_slave; |
| slave->jiffies = jiffies; |
| } else { |
| bond->current_arp_slave = NULL; |
| } |
| |
| /* the current slave must tx an arp to ensure backup slaves |
| * rx traffic |
| */ |
| if (slave && my_ip) { |
| bond_arp_send_all(bond, slave); |
| } |
| } |
| |
| /* if we don't have a curr_active_slave, search for the next available |
| * backup slave from the current_arp_slave and make it the candidate |
| * for becoming the curr_active_slave |
| */ |
| if (!slave) { |
| if (!bond->current_arp_slave) { |
| bond->current_arp_slave = bond->first_slave; |
| } |
| |
| if (bond->current_arp_slave) { |
| bond_set_slave_inactive_flags(bond->current_arp_slave); |
| |
| /* search for next candidate */ |
| bond_for_each_slave_from(bond, slave, i, bond->current_arp_slave) { |
| if (IS_UP(slave->dev)) { |
| slave->link = BOND_LINK_BACK; |
| bond_set_slave_active_flags(slave); |
| bond_arp_send_all(bond, slave); |
| slave->jiffies = jiffies; |
| bond->current_arp_slave = slave; |
| break; |
| } |
| |
| /* if the link state is up at this point, we |
| * mark it down - this can happen if we have |
| * simultaneous link failures and |
| * reselect_active_interface doesn't make this |
| * one the current slave so it is still marked |
| * up when it is actually down |
| */ |
| if (slave->link == BOND_LINK_UP) { |
| slave->link = BOND_LINK_DOWN; |
| if (slave->link_failure_count < UINT_MAX) { |
| slave->link_failure_count++; |
| } |
| |
| bond_set_slave_inactive_flags(slave); |
| |
| printk(KERN_INFO DRV_NAME |
| ": %s: backup interface %s is " |
| "now down.\n", |
| bond_dev->name, |
| slave->dev->name); |
| } |
| } |
| } |
| } |
| |
| re_arm: |
| if (bond->params.arp_interval) { |
| mod_timer(&bond->arp_timer, jiffies + delta_in_ticks); |
| } |
| out: |
| read_unlock(&bond->lock); |
| } |
| |
| /*------------------------------ proc/seq_file-------------------------------*/ |
| |
| #ifdef CONFIG_PROC_FS |
| |
| #define SEQ_START_TOKEN ((void *)1) |
| |
| static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos) |
| { |
| struct bonding *bond = seq->private; |
| loff_t off = 0; |
| struct slave *slave; |
| int i; |
| |
| /* make sure the bond won't be taken away */ |
| read_lock(&dev_base_lock); |
| read_lock_bh(&bond->lock); |
| |
| if (*pos == 0) { |
| return SEQ_START_TOKEN; |
| } |
| |
| bond_for_each_slave(bond, slave, i) { |
| if (++off == *pos) { |
| return slave; |
| } |
| } |
| |
| return NULL; |
| } |
| |
| static void *bond_info_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
| { |
| struct bonding *bond = seq->private; |
| struct slave *slave = v; |
| |
| ++*pos; |
| if (v == SEQ_START_TOKEN) { |
| return bond->first_slave; |
| } |
| |
| slave = slave->next; |
| |
| return (slave == bond->first_slave) ? NULL : slave; |
| } |
| |
| static void bond_info_seq_stop(struct seq_file *seq, void *v) |
| { |
| struct bonding *bond = seq->private; |
| |
| read_unlock_bh(&bond->lock); |
| read_unlock(&dev_base_lock); |
| } |
| |
| static void bond_info_show_master(struct seq_file *seq) |
| { |
| struct bonding *bond = seq->private; |
| struct slave *curr; |
| |
| read_lock(&bond->curr_slave_lock); |
| curr = bond->curr_active_slave; |
| read_unlock(&bond->curr_slave_lock); |
| |
| seq_printf(seq, "Bonding Mode: %s\n", |
| bond_mode_name(bond->params.mode)); |
| |
| if (USES_PRIMARY(bond->params.mode)) { |
| seq_printf(seq, "Primary Slave: %s\n", |
| (bond->params.primary[0]) ? |
| bond->params.primary : "None"); |
| |
| seq_printf(seq, "Currently Active Slave: %s\n", |
| (curr) ? curr->dev->name : "None"); |
| } |
| |
| seq_printf(seq, "MII Status: %s\n", (curr) ? "up" : "down"); |
| seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon); |
| seq_printf(seq, "Up Delay (ms): %d\n", |
| bond->params.updelay * bond->params.miimon); |
| seq_printf(seq, "Down Delay (ms): %d\n", |
| bond->params.downdelay * bond->params.miimon); |
| |
| if (bond->params.mode == BOND_MODE_8023AD) { |
| struct ad_info ad_info; |
| |
| seq_puts(seq, "\n802.3ad info\n"); |
| seq_printf(seq, "LACP rate: %s\n", |
| (bond->params.lacp_fast) ? "fast" : "slow"); |
| |
| if (bond_3ad_get_active_agg_info(bond, &ad_info)) { |
| seq_printf(seq, "bond %s has no active aggregator\n", |
| bond->dev->name); |
| } else { |
| seq_printf(seq, "Active Aggregator Info:\n"); |
| |
| seq_printf(seq, "\tAggregator ID: %d\n", |
| ad_info.aggregator_id); |
| seq_printf(seq, "\tNumber of ports: %d\n", |
| ad_info.ports); |
| seq_printf(seq, "\tActor Key: %d\n", |
| ad_info.actor_key); |
| seq_printf(seq, "\tPartner Key: %d\n", |
| ad_info.partner_key); |
| seq_printf(seq, "\tPartner Mac Address: %02x:%02x:%02x:%02x:%02x:%02x\n", |
| ad_info.partner_system[0], |
| ad_info.partner_system[1], |
| ad_info.partner_system[2], |
| ad_info.partner_system[3], |
| ad_info.partner_system[4], |
| ad_info.partner_system[5]); |
| } |
| } |
| } |
| |
| static void bond_info_show_slave(struct seq_file *seq, const struct slave *slave) |
| { |
| struct bonding *bond = seq->private; |
| |
| seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name); |
| seq_printf(seq, "MII Status: %s\n", |
| (slave->link == BOND_LINK_UP) ? "up" : "down"); |
| seq_printf(seq, "Link Failure Count: %d\n", |
| slave->link_failure_count); |
| |
| if (app_abi_ver >= 1) { |
| seq_printf(seq, |
| "Permanent HW addr: %02x:%02x:%02x:%02x:%02x:%02x\n", |
| slave->perm_hwaddr[0], |
| slave->perm_hwaddr[1], |
| slave->perm_hwaddr[2], |
| slave->perm_hwaddr[3], |
| slave->perm_hwaddr[4], |
| slave->perm_hwaddr[5]); |
| } |
| |
| if (bond->params.mode == BOND_MODE_8023AD) { |
| const struct aggregator *agg |
| = SLAVE_AD_INFO(slave).port.aggregator; |
| |
| if (agg) { |
| seq_printf(seq, "Aggregator ID: %d\n", |
| agg->aggregator_identifier); |
| } else { |
| seq_puts(seq, "Aggregator ID: N/A\n"); |
| } |
| } |
| } |
| |
| static int bond_info_seq_show(struct seq_file *seq, void *v) |
| { |
| if (v == SEQ_START_TOKEN) { |
| seq_printf(seq, "%s\n", version); |
| bond_info_show_master(seq); |
| } else { |
| bond_info_show_slave(seq, v); |
| } |
| |
| return 0; |
| } |
| |
| static struct seq_operations bond_info_seq_ops = { |
| .start = bond_info_seq_start, |
| .next = bond_info_seq_next, |
| .stop = bond_info_seq_stop, |
| .show = bond_info_seq_show, |
| }; |
| |
| static int bond_info_open(struct inode *inode, struct file *file) |
| { |
| struct seq_file *seq; |
| struct proc_dir_entry *proc; |
| int res; |
| |
| res = seq_open(file, &bond_info_seq_ops); |
| if (!res) { |
| /* recover the pointer buried in proc_dir_entry data */ |
| seq = file->private_data; |
| proc = PDE(inode); |
| seq->private = proc->data; |
| } |
| |
| return res; |
| } |
| |
| static struct file_operations bond_info_fops = { |
| .owner = THIS_MODULE, |
| .open = bond_info_open, |
| .read = seq_read, |
| .llseek = seq_lseek, |
| .release = seq_release, |
| }; |
| |
| static int bond_create_proc_entry(struct bonding *bond) |
| { |
| struct net_device *bond_dev = bond->dev; |
| |
| if (bond_proc_dir) { |
| bond->proc_entry = create_proc_entry(bond_dev->name, |
| S_IRUGO, |
| bond_proc_dir); |
| if (bond->proc_entry == NULL) { |
| printk(KERN_WARNING DRV_NAME |
| ": Warning: Cannot create /proc/net/%s/%s\n", |
| DRV_NAME, bond_dev->name); |
| } else { |
| bond->proc_entry->data = bond; |
| bond->proc_entry->proc_fops = &bond_info_fops; |
| bond->proc_entry->owner = THIS_MODULE; |
| memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ); |
| } |
| } |
| |
| return 0; |
| } |
| |
| static void bond_remove_proc_entry(struct bonding *bond) |
| { |
| if (bond_proc_dir && bond->proc_entry) { |
| remove_proc_entry(bond->proc_file_name, bond_proc_dir); |
| memset(bond->proc_file_name, 0, IFNAMSIZ); |
| bond->proc_entry = NULL; |
| } |
| } |
| |
| /* Create the bonding directory under /proc/net, if doesn't exist yet. |
| * Caller must hold rtnl_lock. |
| */ |
| static void bond_create_proc_dir(void) |
| { |
| int len = strlen(DRV_NAME); |
| |
| for (bond_proc_dir = proc_net->subdir; bond_proc_dir; |
| bond_proc_dir = bond_proc_dir->next) { |
| if ((bond_proc_dir->namelen == len) && |
| !memcmp(bond_proc_dir->name, DRV_NAME, len)) { |
| break; |
| } |
| } |
| |
| if (!bond_proc_dir) { |
| bond_proc_dir = proc_mkdir(DRV_NAME, proc_net); |
| if (bond_proc_dir) { |
| bond_proc_dir->owner = THIS_MODULE; |
| } else { |
| printk(KERN_WARNING DRV_NAME |
| ": Warning: cannot create /proc/net/%s\n", |
| DRV_NAME); |
| } |
| } |
| } |
| |
| /* Destroy the bonding directory under /proc/net, if empty. |
| * Caller must hold rtnl_lock. |
| */ |
| static void bond_destroy_proc_dir(void) |
| { |
| struct proc_dir_entry *de; |
| |
| if (!bond_proc_dir) { |
| return; |
| } |
| |
| /* verify that the /proc dir is empty */ |
| for (de = bond_proc_dir->subdir; de; de = de->next) { |
| /* ignore . and .. */ |
| if (*(de->name) != '.') { |
| break; |
| } |
| } |
| |
| if (de) { |
| if (bond_proc_dir->owner == THIS_MODULE) { |
| bond_proc_dir->owner = NULL; |
| } |
| } else { |
| remove_proc_entry(DRV_NAME, proc_net); |
| bond_proc_dir = NULL; |
| } |
| } |
| #endif /* CONFIG_PROC_FS */ |
| |
| /*-------------------------- netdev event handling --------------------------*/ |
| |
| /* |
| * Change device name |
| */ |
| static int bond_event_changename(struct bonding *bond) |
| { |
| #ifdef CONFIG_PROC_FS |
| bond_remove_proc_entry(bond); |
| bond_create_proc_entry(bond); |
| #endif |
| |
| return NOTIFY_DONE; |
| } |
| |
| static int bond_master_netdev_event(unsigned long event, struct net_device *bond_dev) |
| { |
| struct bonding *event_bond = bond_dev->priv; |
| |
| switch (event) { |
| case NETDEV_CHANGENAME: |
| return bond_event_changename(event_bond); |
| case NETDEV_UNREGISTER: |
| /* |
| * TODO: remove a bond from the list? |
| */ |
| break; |
| default: |
| break; |
| } |
| |
| return NOTIFY_DONE; |
| } |
| |
| static int bond_slave_netdev_event(unsigned long event, struct net_device *slave_dev) |
| { |
| struct net_device *bond_dev = slave_dev->master; |
| |
| switch (event) { |
| case NETDEV_UNREGISTER: |
| if (bond_dev) { |
| bond_release(bond_dev, slave_dev); |
| } |
| break; |
| case NETDEV_CHANGE: |
| /* |
| * TODO: is this what we get if somebody |
| * sets up a hierarchical bond, then rmmod's |
| * one of the slave bonding devices? |
| */ |
| break; |
| case NETDEV_DOWN: |
| /* |
| * ... Or is it this? |
| */ |
| break; |
| case NETDEV_CHANGEMTU: |
| /* |
| * TODO: Should slaves be allowed to |
| * independently alter their MTU? For |
| * an active-backup bond, slaves need |
| * not be the same type of device, so |
| * MTUs may vary. For other modes, |
| * slaves arguably should have the |
| * same MTUs. To do this, we'd need to |
| * take over the slave's change_mtu |
| * function for the duration of their |
| * servitude. |
| */ |
| break; |
| case NETDEV_CHANGENAME: |
| /* |
| * TODO: handle changing the primary's name |
| */ |
| break; |
| default: |
| break; |
| } |
| |
| return NOTIFY_DONE; |
| } |
| |
| /* |
| * bond_netdev_event: handle netdev notifier chain events. |
| * |
| * This function receives events for the netdev chain. The caller (an |
| * ioctl handler calling notifier_call_chain) holds the necessary |
| * locks for us to safely manipulate the slave devices (RTNL lock, |
| * dev_probe_lock). |
| */ |
| static int bond_netdev_event(struct notifier_block *this, unsigned long event, void *ptr) |
| { |
| struct net_device *event_dev = (struct net_device *)ptr; |
| |
| dprintk("event_dev: %s, event: %lx\n", |
| (event_dev ? event_dev->name : "None"), |
| event); |
| |
| if (event_dev->flags & IFF_MASTER) { |
| dprintk("IFF_MASTER\n"); |
| return bond_master_netdev_event(event, event_dev); |
| } |
| |
| if (event_dev->flags & IFF_SLAVE) { |
| dprintk("IFF_SLAVE\n"); |
| return bond_slave_netdev_event(event, event_dev); |
| } |
| |
| return NOTIFY_DONE; |
| } |
| |
| static struct notifier_block bond_netdev_notifier = { |
| .notifier_call = bond_netdev_event, |
| }; |
| |
| /*-------------------------- Packet type handling ---------------------------*/ |
| |
| /* register to receive lacpdus on a bond */ |
| static void bond_register_lacpdu(struct bonding *bond) |
| { |
| struct packet_type *pk_type = &(BOND_AD_INFO(bond).ad_pkt_type); |
| |
| /* initialize packet type */ |
| pk_type->type = PKT_TYPE_LACPDU; |
| pk_type->dev = bond->dev; |
| pk_type->func = bond_3ad_lacpdu_recv; |
| |
| dev_add_pack(pk_type); |
| } |
| |
| /* unregister to receive lacpdus on a bond */ |
| static void bond_unregister_lacpdu(struct bonding *bond) |
| { |
| dev_remove_pack(&(BOND_AD_INFO(bond).ad_pkt_type)); |
| } |
| |
| /*-------------------------- Device entry points ----------------------------*/ |
| |
| static int bond_open(struct net_device *bond_dev) |
| { |
| struct bonding *bond = bond_dev->priv; |
| struct timer_list *mii_timer = &bond->mii_timer; |
| struct timer_list *arp_timer = &bond->arp_timer; |
| |
| bond->kill_timers = 0; |
| |
| if ((bond->params.mode == BOND_MODE_TLB) || |
| (bond->params.mode == BOND_MODE_ALB)) { |
| struct timer_list *alb_timer = &(BOND_ALB_INFO(bond).alb_timer); |
| |
| /* bond_alb_initialize must be called before the timer |
| * is started. |
| */ |
| if (bond_alb_initialize(bond, (bond->params.mode == BOND_MODE_ALB))) { |
| /* something went wrong - fail the open operation */ |
| return -1; |
| } |
| |
| init_timer(alb_timer); |
| alb_timer->expires = jiffies + 1; |
| alb_timer->data = (unsigned long)bond; |
| alb_timer->function = (void *)&bond_alb_monitor; |
| add_timer(alb_timer); |
| } |
| |
| if (bond->params.miimon) { /* link check interval, in milliseconds. */ |
| init_timer(mii_timer); |
| mii_timer->expires = jiffies + 1; |
| mii_timer->data = (unsigned long)bond_dev; |
| mii_timer->function = (void *)&bond_mii_monitor; |
| add_timer(mii_timer); |
| } |
| |
| if (bond->params.arp_interval) { /* arp interval, in milliseconds. */ |
| init_timer(arp_timer); |
| arp_timer->expires = jiffies + 1; |
| arp_timer->data = (unsigned long)bond_dev; |
| if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) { |
| arp_timer->function = (void *)&bond_activebackup_arp_mon; |
| } else { |
| arp_timer->function = (void *)&bond_loadbalance_arp_mon; |
| } |
| add_timer(arp_timer); |
| } |
| |
| if (bond->params.mode == BOND_MODE_8023AD) { |
| struct timer_list *ad_timer = &(BOND_AD_INFO(bond).ad_timer); |
| init_timer(ad_timer); |
| ad_timer->expires = jiffies + 1; |
| ad_timer->data = (unsigned long)bond; |
| ad_timer->function = (void *)&bond_3ad_state_machine_handler; |
| add_timer(ad_timer); |
| |
| /* register to receive LACPDUs */ |
| bond_register_lacpdu(bond); |
| } |
| |
| return 0; |
| } |
| |
| static int bond_close(struct net_device *bond_dev) |
| { |
| struct bonding *bond = bond_dev->priv; |
| |
| if (bond->params.mode == BOND_MODE_8023AD) { |
| /* Unregister the receive of LACPDUs */ |
| bond_unregister_lacpdu(bond); |
| } |
| |
| write_lock_bh(&bond->lock); |
| |
| bond_mc_list_destroy(bond); |
| |
| /* signal timers not to re-arm */ |
| bond->kill_timers = 1; |
| |
| write_unlock_bh(&bond->lock); |
| |
| /* del_timer_sync must run without holding the bond->lock |
| * because a running timer might be trying to hold it too |
| */ |
| |
| if (bond->params.miimon) { /* link check interval, in milliseconds. */ |
| del_timer_sync(&bond->mii_timer); |
| } |
| |
| if (bond->params.arp_interval) { /* arp interval, in milliseconds. */ |
| del_timer_sync(&bond->arp_timer); |
| } |
| |
| switch (bond->params.mode) { |
| case BOND_MODE_8023AD: |
| del_timer_sync(&(BOND_AD_INFO(bond).ad_timer)); |
| break; |
| case BOND_MODE_TLB: |
| case BOND_MODE_ALB: |
| del_timer_sync(&(BOND_ALB_INFO(bond).alb_timer)); |
| break; |
| default: |
| break; |
| } |
| |
| /* Release the bonded slaves */ |
| bond_release_all(bond_dev); |
| |
| if ((bond->params.mode == BOND_MODE_TLB) || |
| (bond->params.mode == BOND_MODE_ALB)) { |
| /* Must be called only after all |
| * slaves have been released |
| */ |
| bond_alb_deinitialize(bond); |
| } |
| |
| return 0; |
| } |
| |
| static struct net_device_stats *bond_get_stats(struct net_device *bond_dev) |
| { |
| struct bonding *bond = bond_dev->priv; |
| struct net_device_stats *stats = &(bond->stats), *sstats; |
| struct slave *slave; |
| int i; |
| |
| memset(stats, 0, sizeof(struct net_device_stats)); |
| |
| read_lock_bh(&bond->lock); |
| |
| bond_for_each_slave(bond, slave, i) { |
| sstats = slave->dev->get_stats(slave->dev); |
| |
| stats->rx_packets += sstats->rx_packets; |
| stats->rx_bytes += sstats->rx_bytes; |
| stats->rx_errors += sstats->rx_errors; |
| stats->rx_dropped += sstats->rx_dropped; |
| |
| stats->tx_packets += sstats->tx_packets; |
| stats->tx_bytes += sstats->tx_bytes; |
| stats->tx_errors += sstats->tx_errors; |
| stats->tx_dropped += sstats->tx_dropped; |
| |
| stats->multicast += sstats->multicast; |
| stats->collisions += sstats->collisions; |
| |
| stats->rx_length_errors += sstats->rx_length_errors; |
| stats->rx_over_errors += sstats->rx_over_errors; |
| stats->rx_crc_errors += sstats->rx_crc_errors; |
| stats->rx_frame_errors += sstats->rx_frame_errors; |
| stats->rx_fifo_errors += sstats->rx_fifo_errors; |
| stats->rx_missed_errors += sstats->rx_missed_errors; |
| |
| stats->tx_aborted_errors += sstats->tx_aborted_errors; |
| stats->tx_carrier_errors += sstats->tx_carrier_errors; |
| stats->tx_fifo_errors += sstats->tx_fifo_errors; |
| stats->tx_heartbeat_errors += sstats->tx_heartbeat_errors; |
| stats->tx_window_errors += sstats->tx_window_errors; |
| } |
| |
| read_unlock_bh(&bond->lock); |
| |
| return stats; |
| } |
| |
| static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd) |
| { |
| struct net_device *slave_dev = NULL; |
| struct ifbond k_binfo; |
| struct ifbond __user *u_binfo = NULL; |
| struct ifslave k_sinfo; |
| struct ifslave __user *u_sinfo = NULL; |
| struct mii_ioctl_data *mii = NULL; |
| int prev_abi_ver = orig_app_abi_ver; |
| int res = 0; |
| |
| dprintk("bond_ioctl: master=%s, cmd=%d\n", |
| bond_dev->name, cmd); |
| |
| switch (cmd) { |
| case SIOCETHTOOL: |
| return bond_ethtool_ioctl(bond_dev, ifr); |
| case SIOCGMIIPHY: |
| mii = if_mii(ifr); |
| if (!mii) { |
| return -EINVAL; |
| } |
| mii->phy_id = 0; |
| /* Fall Through */ |
| case SIOCGMIIREG: |
| /* |
| * We do this again just in case we were called by SIOCGMIIREG |
| * instead of SIOCGMIIPHY. |
| */ |
| mii = if_mii(ifr); |
| if (!mii) { |
| return -EINVAL; |
| } |
| |
| if (mii->reg_num == 1) { |
| struct bonding *bond = bond_dev->priv; |
| mii->val_out = 0; |
| read_lock_bh(&bond->lock); |
| read_lock(&bond->curr_slave_lock); |
| if (bond->curr_active_slave) { |
| mii->val_out = BMSR_LSTATUS; |
| } |
| read_unlock(&bond->curr_slave_lock); |
| read_unlock_bh(&bond->lock); |
| } |
| |
| return 0; |
| case BOND_INFO_QUERY_OLD: |
| case SIOCBONDINFOQUERY: |
| u_binfo = (struct ifbond __user *)ifr->ifr_data; |
| |
| if (copy_from_user(&k_binfo, u_binfo, sizeof(ifbond))) { |
| return -EFAULT; |
| } |
| |
| res = bond_info_query(bond_dev, &k_binfo); |
| if (res == 0) { |
| if (copy_to_user(u_binfo, &k_binfo, sizeof(ifbond))) { |
| return -EFAULT; |
| } |
| } |
| |
| return res; |
| case BOND_SLAVE_INFO_QUERY_OLD: |
| case SIOCBONDSLAVEINFOQUERY: |
| u_sinfo = (struct ifslave __user *)ifr->ifr_data; |
| |
| if (copy_from_user(&k_sinfo, u_sinfo, sizeof(ifslave))) { |
| return -EFAULT; |
| } |
| |
| res = bond_slave_info_query(bond_dev, &k_sinfo); |
| if (res == 0) { |
| if (copy_to_user(u_sinfo, &k_sinfo, sizeof(ifslave))) { |
| return -EFAULT; |
| } |
| } |
| |
| return res; |
| default: |
| /* Go on */ |
| break; |
| } |
| |
| if (!capable(CAP_NET_ADMIN)) { |
| return -EPERM; |
| } |
| |
| if (orig_app_abi_ver == -1) { |
| /* no orig_app_abi_ver was provided yet, so we'll use the |
| * current one from now on, even if it's 0 |
| */ |
| orig_app_abi_ver = app_abi_ver; |
| |
| } else if (orig_app_abi_ver != app_abi_ver) { |
| printk(KERN_ERR DRV_NAME |
| ": Error: already using ifenslave ABI version %d; to " |
| "upgrade ifenslave to version %d, you must first " |
| "reload bonding.\n", |
| orig_app_abi_ver, app_abi_ver); |
| return -EINVAL; |
| } |
| |
| slave_dev = dev_get_by_name(ifr->ifr_slave); |
| |
| dprintk("slave_dev=%p: \n", slave_dev); |
| |
| if (!slave_dev) { |
| res = -ENODEV; |
| } else { |
| dprintk("slave_dev->name=%s: \n", slave_dev->name); |
| switch (cmd) { |
| case BOND_ENSLAVE_OLD: |
| case SIOCBONDENSLAVE: |
| res = bond_enslave(bond_dev, slave_dev); |
| break; |
| case BOND_RELEASE_OLD: |
| case SIOCBONDRELEASE: |
| res = bond_release(bond_dev, slave_dev); |
| break; |
| case BOND_SETHWADDR_OLD: |
| case SIOCBONDSETHWADDR: |
| res = bond_sethwaddr(bond_dev, slave_dev); |
| break; |
| case BOND_CHANGE_ACTIVE_OLD: |
| case SIOCBONDCHANGEACTIVE: |
| res = bond_ioctl_change_active(bond_dev, slave_dev); |
| break; |
| default: |
| res = -EOPNOTSUPP; |
| } |
| |
| dev_put(slave_dev); |
| } |
| |
| if (res < 0) { |
| /* The ioctl failed, so there's no point in changing the |
| * orig_app_abi_ver. We'll restore it's value just in case |
| * we've changed it earlier in this function. |
| */ |
| orig_app_abi_ver = prev_abi_ver; |
| } |
| |
| return res; |
| } |
| |
| static void bond_set_multicast_list(struct net_device *bond_dev) |
| { |
| struct bonding *bond = bond_dev->priv; |
| struct dev_mc_list *dmi; |
| |
| write_lock_bh(&bond->lock); |
| |
| /* |
| * Do promisc before checking multicast_mode |
| */ |
| if ((bond_dev->flags & IFF_PROMISC) && !(bond->flags & IFF_PROMISC)) { |
| bond_set_promiscuity(bond, 1); |
| } |
| |
| if (!(bond_dev->flags & IFF_PROMISC) && (bond->flags & IFF_PROMISC)) { |
| bond_set_promiscuity(bond, -1); |
| } |
| |
| /* set allmulti flag to slaves */ |
| if ((bond_dev->flags & IFF_ALLMULTI) && !(bond->flags & IFF_ALLMULTI)) { |
| bond_set_allmulti(bond, 1); |
| } |
| |
| if (!(bond_dev->flags & IFF_ALLMULTI) && (bond->flags & IFF_ALLMULTI)) { |
| bond_set_allmulti(bond, -1); |
| } |
| |
| bond->flags = bond_dev->flags; |
| |
| /* looking for addresses to add to slaves' mc list */ |
| for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) { |
| if (!bond_mc_list_find_dmi(dmi, bond->mc_list)) { |
| bond_mc_add(bond, dmi->dmi_addr, dmi->dmi_addrlen); |
| } |
| } |
| |
| /* looking for addresses to delete from slaves' list */ |
| for (dmi = bond->mc_list; dmi; dmi = dmi->next) { |
| if (!bond_mc_list_find_dmi(dmi, bond_dev->mc_list)) { |
| bond_mc_delete(bond, dmi->dmi_addr, dmi->dmi_addrlen); |
| } |
| } |
| |
| /* save master's multicast list */ |
| bond_mc_list_destroy(bond); |
| bond_mc_list_copy(bond_dev->mc_list, bond, GFP_ATOMIC); |
| |
| write_unlock_bh(&bond->lock); |
| } |
| |
| /* |
| * Change the MTU of all of a master's slaves to match the master |
| */ |
| static int bond_change_mtu(struct net_device *bond_dev, int new_mtu) |
| { |
| struct bonding *bond = bond_dev->priv; |
| struct slave *slave, *stop_at; |
| int res = 0; |
| int i; |
| |
| dprintk("bond=%p, name=%s, new_mtu=%d\n", bond, |
| (bond_dev ? bond_dev->name : "None"), new_mtu); |
| |
| /* Can't hold bond->lock with bh disabled here since |
| * some base drivers panic. On the other hand we can't |
| * hold bond->lock without bh disabled because we'll |
| * deadlock. The only solution is to rely on the fact |
| * that we're under rtnl_lock here, and the slaves |
| * list won't change. This doesn't solve the problem |
| * of setting the slave's MTU while it is |
| * transmitting, but the assumption is that the base |
| * driver can handle that. |
| * |
| * TODO: figure out a way to safely iterate the slaves |
| * list, but without holding a lock around the actual |
| * call to the base driver. |
| */ |
| |
| bond_for_each_slave(bond, slave, i) { |
| dprintk("s %p s->p %p c_m %p\n", slave, |
| slave->prev, slave->dev->change_mtu); |
| res = dev_set_mtu(slave->dev, new_mtu); |
| |
| if (res) { |
| /* If we failed to set the slave's mtu to the new value |
| * we must abort the operation even in ACTIVE_BACKUP |
| * mode, because if we allow the backup slaves to have |
| * different mtu values than the active slave we'll |
| * need to change their mtu when doing a failover. That |
| * means changing their mtu from timer context, which |
| * is probably not a good idea. |
| */ |
| dprintk("err %d %s\n", res, slave->dev->name); |
| goto unwind; |
| } |
| } |
| |
| bond_dev->mtu = new_mtu; |
| |
| return 0; |
| |
| unwind: |
| /* unwind from head to the slave that failed */ |
| stop_at = slave; |
| bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) { |
| int tmp_res; |
| |
| tmp_res = dev_set_mtu(slave->dev, bond_dev->mtu); |
| if (tmp_res) { |
| dprintk("unwind err %d dev %s\n", tmp_res, |
| slave->dev->name); |
| } |
| } |
| |
| return res; |
| } |
| |
| /* |
| * Change HW address |
| * |
| * Note that many devices must be down to change the HW address, and |
| * downing the master releases all slaves. We can make bonds full of |
| * bonding devices to test this, however. |
| */ |
| static int bond_set_mac_address(struct net_device *bond_dev, void *addr) |
| { |
| struct bonding *bond = bond_dev->priv; |
| struct sockaddr *sa = addr, tmp_sa; |
| struct slave *slave, *stop_at; |
| int res = 0; |
| int i; |
| |
| dprintk("bond=%p, name=%s\n", bond, (bond_dev ? bond_dev->name : "None")); |
| |
| if (!is_valid_ether_addr(sa->sa_data)) { |
| return -EADDRNOTAVAIL; |
| } |
| |
| /* Can't hold bond->lock with bh disabled here since |
| * some base drivers panic. On the other hand we can't |
| * hold bond->lock without bh disabled because we'll |
| * deadlock. The only solution is to rely on the fact |
| * that we're under rtnl_lock here, and the slaves |
| * list won't change. This doesn't solve the problem |
| * of setting the slave's hw address while it is |
| * transmitting, but the assumption is that the base |
| * driver can handle that. |
| * |
| * TODO: figure out a way to safely iterate the slaves |
| * list, but without holding a lock around the actual |
| * call to the base driver. |
| */ |
| |
| bond_for_each_slave(bond, slave, i) { |
| dprintk("slave %p %s\n", slave, slave->dev->name); |
| |
| if (slave->dev->set_mac_address == NULL) { |
| res = -EOPNOTSUPP; |
| dprintk("EOPNOTSUPP %s\n", slave->dev->name); |
| goto unwind; |
| } |
| |
| res = dev_set_mac_address(slave->dev, addr); |
| if (res) { |
| /* TODO: consider downing the slave |
| * and retry ? |
| * User should expect communications |
| * breakage anyway until ARP finish |
| * updating, so... |
| */ |
| dprintk("err %d %s\n", res, slave->dev->name); |
| goto unwind; |
| } |
| } |
| |
| /* success */ |
| memcpy(bond_dev->dev_addr, sa->sa_data, bond_dev->addr_len); |
| return 0; |
| |
| unwind: |
| memcpy(tmp_sa.sa_data, bond_dev->dev_addr, bond_dev->addr_len); |
| tmp_sa.sa_family = bond_dev->type; |
| |
| /* unwind from head to the slave that failed */ |
| stop_at = slave; |
| bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) { |
| int tmp_res; |
| |
| tmp_res = dev_set_mac_address(slave->dev, &tmp_sa); |
| if (tmp_res) { |
| dprintk("unwind err %d dev %s\n", tmp_res, |
| slave->dev->name); |
| } |
| } |
| |
| return res; |
| } |
| |
| static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *bond_dev) |
| { |
| struct bonding *bond = bond_dev->priv; |
| struct slave *slave, *start_at; |
| int i; |
| int res = 1; |
| |
| read_lock(&bond->lock); |
| |
| if (!BOND_IS_OK(bond)) { |
| goto out; |
| } |
| |
| read_lock(&bond->curr_slave_lock); |
| slave = start_at = bond->curr_active_slave; |
| read_unlock(&bond->curr_slave_lock); |
| |
| if (!slave) { |
| goto out; |
| } |
| |
| bond_for_each_slave_from(bond, slave, i, start_at) { |
| if (IS_UP(slave->dev) && |
| (slave->link == BOND_LINK_UP) && |
| (slave->state == BOND_STATE_ACTIVE)) { |
| res = bond_dev_queue_xmit(bond, skb, slave->dev); |
| |
| write_lock(&bond->curr_slave_lock); |
| bond->curr_active_slave = slave->next; |
| write_unlock(&bond->curr_slave_lock); |
| |
| break; |
| } |
| } |
| |
| |
| out: |
| if (res) { |
| /* no suitable interface, frame not sent */ |
| dev_kfree_skb(skb); |
| } |
| read_unlock(&bond->lock); |
| return 0; |
| } |
| |
| /* |
| * in active-backup mode, we know that bond->curr_active_slave is always valid if |
| * the bond has a usable interface. |
| */ |
| static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *bond_dev) |
| { |
| struct bonding *bond = bond_dev->priv; |
| int res = 1; |
| |
| /* if we are sending arp packets, try to at least |
| identify our own ip address */ |
| if (bond->params.arp_interval && !my_ip && |
| (skb->protocol == __constant_htons(ETH_P_ARP))) { |
| char *the_ip = (char *)skb->data + |
| sizeof(struct ethhdr) + |
| sizeof(struct arphdr) + |
| ETH_ALEN; |
| memcpy(&my_ip, the_ip, 4); |
| } |
| |
| read_lock(&bond->lock); |
| read_lock(&bond->curr_slave_lock); |
| |
| if (!BOND_IS_OK(bond)) { |
| goto out; |
| } |
| |
| if (bond->curr_active_slave) { /* one usable interface */ |
| res = bond_dev_queue_xmit(bond, skb, bond->curr_active_slave->dev); |
| } |
| |
| out: |
| if (res) { |
| /* no suitable interface, frame not sent */ |
| dev_kfree_skb(skb); |
| } |
| read_unlock(&bond->curr_slave_lock); |
| read_unlock(&bond->lock); |
| return 0; |
| } |
| |
| /* |
| * in XOR mode, we determine the output device by performing xor on |
| * the source and destination hw adresses. If this device is not |
| * enabled, find the next slave following this xor slave. |
| */ |
| static int bond_xmit_xor(struct sk_buff *skb, struct net_device *bond_dev) |
| { |
| struct bonding *bond = bond_dev->priv; |
| struct ethhdr *data = (struct ethhdr *)skb->data; |
| struct slave *slave, *start_at; |
| int slave_no; |
| int i; |
| int res = 1; |
| |
| read_lock(&bond->lock); |
| |
| if (!BOND_IS_OK(bond)) { |
| goto out; |
| } |
| |
| slave_no = (data->h_dest[5]^bond_dev->dev_addr[5]) % bond->slave_cnt; |
| |
| bond_for_each_slave(bond, slave, i) { |
| slave_no--; |
| if (slave_no < 0) { |
| break; |
| } |
| } |
| |
| start_at = slave; |
| |
| bond_for_each_slave_from(bond, slave, i, start_at) { |
| if (IS_UP(slave->dev) && |
| (slave->link == BOND_LINK_UP) && |
| (slave->state == BOND_STATE_ACTIVE)) { |
| res = bond_dev_queue_xmit(bond, skb, slave->dev); |
| break; |
| } |
| } |
| |
| out: |
| if (res) { |
| /* no suitable interface, frame not sent */ |
| dev_kfree_skb(skb); |
| } |
| read_unlock(&bond->lock); |
| return 0; |
| } |
| |
| /* |
| * in broadcast mode, we send everything to all usable interfaces. |
| */ |
| static int bond_xmit_broadcast(struct sk_buff *skb, struct net_device *bond_dev) |
| { |
| struct bonding *bond = bond_dev->priv; |
| struct slave *slave, *start_at; |
| struct net_device *tx_dev = NULL; |
| int i; |
| int res = 1; |
| |
| read_lock(&bond->lock); |
| |
| if (!BOND_IS_OK(bond)) { |
| goto out; |
| } |
| |
| read_lock(&bond->curr_slave_lock); |
| start_at = bond->curr_active_slave; |
| read_unlock(&bond->curr_slave_lock); |
| |
| if (!start_at) { |
| goto out; |
| } |
| |
| bond_for_each_slave_from(bond, slave, i, start_at) { |
| if (IS_UP(slave->dev) && |
| (slave->link == BOND_LINK_UP) && |
| (slave->state == BOND_STATE_ACTIVE)) { |
| if (tx_dev) { |
| struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); |
| if (!skb2) { |
| printk(KERN_ERR DRV_NAME |
| ": Error: bond_xmit_broadcast(): " |
| "skb_clone() failed\n"); |
| continue; |
| } |
| |
| res = bond_dev_queue_xmit(bond, skb2, tx_dev); |
| if (res) { |
| dev_kfree_skb(skb2); |
| continue; |
| } |
| } |
| tx_dev = slave->dev; |
| } |
| } |
| |
| if (tx_dev) { |
| res = bond_dev_queue_xmit(bond, skb, tx_dev); |
| } |
| |
| out: |
| if (res) { |
| /* no suitable interface, frame not sent */ |
| dev_kfree_skb(skb); |
| } |
| /* frame sent to all suitable interfaces */ |
| read_unlock(&bond->lock); |
| return 0; |
| } |
| |
| /*------------------------- Device initialization ---------------------------*/ |
| |
| /* |
| * set bond mode specific net device operations |
| */ |
| static inline void bond_set_mode_ops(struct net_device *bond_dev, int mode) |
| { |
| switch (mode) { |
| case BOND_MODE_ROUNDROBIN: |
| bond_dev->hard_start_xmit = bond_xmit_roundrobin; |
| break; |
| case BOND_MODE_ACTIVEBACKUP: |
| bond_dev->hard_start_xmit = bond_xmit_activebackup; |
| break; |
| case BOND_MODE_XOR: |
| bond_dev->hard_start_xmit = bond_xmit_xor; |
| break; |
| case BOND_MODE_BROADCAST: |
| bond_dev->hard_start_xmit = bond_xmit_broadcast; |
| break; |
| case BOND_MODE_8023AD: |
| bond_dev->hard_start_xmit = bond_3ad_xmit_xor; |
| break; |
| case BOND_MODE_TLB: |
| case BOND_MODE_ALB: |
| bond_dev->hard_start_xmit = bond_alb_xmit; |
| bond_dev->set_mac_address = bond_alb_set_mac_address; |
| break; |
| default: |
| /* Should never happen, mode already checked */ |
| printk(KERN_ERR DRV_NAME |
| ": Error: Unknown bonding mode %d\n", |
| mode); |
| break; |
| } |
| } |
| |
| /* |
| * Does not allocate but creates a /proc entry. |
| * Allowed to fail. |
| */ |
| static int __init bond_init(struct net_device *bond_dev, struct bond_params *params) |
| { |
| struct bonding *bond = bond_dev->priv; |
| |
| dprintk("Begin bond_init for %s\n", bond_dev->name); |
| |
| /* initialize rwlocks */ |
| rwlock_init(&bond->lock); |
| rwlock_init(&bond->curr_slave_lock); |
| |
| bond->params = *params; /* copy params struct */ |
| |
| /* Initialize pointers */ |
| bond->first_slave = NULL; |
| bond->curr_active_slave = NULL; |
| bond->current_arp_slave = NULL; |
| bond->primary_slave = NULL; |
| bond->dev = bond_dev; |
| INIT_LIST_HEAD(&bond->vlan_list); |
| |
| /* Initialize the device entry points */ |
| bond_dev->open = bond_open; |
| bond_dev->stop = bond_close; |
| bond_dev->get_stats = bond_get_stats; |
| bond_dev->do_ioctl = bond_do_ioctl; |
| bond_dev->set_multicast_list = bond_set_multicast_list; |
| bond_dev->change_mtu = bond_change_mtu; |
| bond_dev->set_mac_address = bond_set_mac_address; |
| |
| bond_set_mode_ops(bond_dev, bond->params.mode); |
| |
| bond_dev->destructor = free_netdev; |
| |
| /* Initialize the device options */ |
| bond_dev->tx_queue_len = 0; |
| bond_dev->flags |= IFF_MASTER|IFF_MULTICAST; |
| |
| /* At first, we block adding VLANs. That's the only way to |
| * prevent problems that occur when adding VLANs over an |
| * empty bond. The block will be removed once non-challenged |
| * slaves are enslaved. |
| */ |
| bond_dev->features |= NETIF_F_VLAN_CHALLENGED; |
| |
| /* don't acquire bond device's xmit_lock when |
| * transmitting */ |
| bond_dev->features |= NETIF_F_LLTX; |
| |
| /* By default, we declare the bond to be fully |
| * VLAN hardware accelerated capable. Special |
| * care is taken in the various xmit functions |
| * when there are slaves that are not hw accel |
| * capable |
| */ |
| bond_dev->vlan_rx_register = bond_vlan_rx_register; |
| bond_dev->vlan_rx_add_vid = bond_vlan_rx_add_vid; |
| bond_dev->vlan_rx_kill_vid = bond_vlan_rx_kill_vid; |
| bond_dev->features |= (NETIF_F_HW_VLAN_TX | |
| NETIF_F_HW_VLAN_RX | |
| NETIF_F_HW_VLAN_FILTER); |
| |
| #ifdef CONFIG_PROC_FS |
| bond_create_proc_entry(bond); |
| #endif |
| |
| list_add_tail(&bond->bond_list, &bond_dev_list); |
| |
| return 0; |
| } |
| |
| /* De-initialize device specific data. |
| * Caller must hold rtnl_lock. |
| */ |
| static inline void bond_deinit(struct net_device *bond_dev) |
| { |
| struct bonding *bond = bond_dev->priv; |
| |
| list_del(&bond->bond_list); |
| |
| #ifdef CONFIG_PROC_FS |
| bond_remove_proc_entry(bond); |
| #endif |
| } |
| |
| /* Unregister and free all bond devices. |
| * Caller must hold rtnl_lock. |
| */ |
| static void bond_free_all(void) |
| { |
| struct bonding *bond, *nxt; |
| |
| list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list) { |
| struct net_device *bond_dev = bond->dev; |
| |
| unregister_netdevice(bond_dev); |
| bond_deinit(bond_dev); |
| } |
| |
| #ifdef CONFIG_PROC_FS |
| bond_destroy_proc_dir(); |
| #endif |
| } |
| |
| /*------------------------- Module initialization ---------------------------*/ |
| |
| /* |
| * Convert string input module parms. Accept either the |
| * number of the mode or its string name. |
| */ |
| static inline int bond_parse_parm(char *mode_arg, struct bond_parm_tbl *tbl) |
| { |
| int i; |
| |
| for (i = 0; tbl[i].modename; i++) { |
| if ((isdigit(*mode_arg) && |
| tbl[i].mode == simple_strtol(mode_arg, NULL, 0)) || |
| (strncmp(mode_arg, tbl[i].modename, |
| strlen(tbl[i].modename)) == 0)) { |
| return tbl[i].mode; |
| } |
| } |
| |
| return -1; |
| } |
| |
| static int bond_check_params(struct bond_params *params) |
| { |
| /* |
| * Convert string parameters. |
| */ |
| if (mode) { |
| bond_mode = bond_parse_parm(mode, bond_mode_tbl); |
| if (bond_mode == -1) { |
| printk(KERN_ERR DRV_NAME |
| ": Error: Invalid bonding mode \"%s\"\n", |
| mode == NULL ? "NULL" : mode); |
| return -EINVAL; |
| } |
| } |
| |
| if (lacp_rate) { |
| if (bond_mode != BOND_MODE_8023AD) { |
| printk(KERN_INFO DRV_NAME |
| ": lacp_rate param is irrelevant in mode %s\n", |
| bond_mode_name(bond_mode)); |
| } else { |
| lacp_fast = bond_parse_parm(lacp_rate, bond_lacp_tbl); |
| if (lacp_fast == -1) { |
| printk(KERN_ERR DRV_NAME |
| ": Error: Invalid lacp rate \"%s\"\n", |
| lacp_rate == NULL ? "NULL" : lacp_rate); |
| return -EINVAL; |
| } |
| } |
| } |
| |
| if (max_bonds < 1 || max_bonds > INT_MAX) { |
| printk(KERN_WARNING DRV_NAME |
| ": Warning: max_bonds (%d) not in range %d-%d, so it " |
| "was reset to BOND_DEFAULT_MAX_BONDS (%d)", |
| max_bonds, 1, INT_MAX, BOND_DEFAULT_MAX_BONDS); |
| max_bonds = BOND_DEFAULT_MAX_BONDS; |
| } |
| |
| if (miimon < 0) { |
| printk(KERN_WARNING DRV_NAME |
| ": Warning: miimon module parameter (%d), " |
| "not in range 0-%d, so it was reset to %d\n", |
| miimon, INT_MAX, BOND_LINK_MON_INTERV); |
| miimon = BOND_LINK_MON_INTERV; |
| } |
| |
| if (updelay < 0) { |
| printk(KERN_WARNING DRV_NAME |
| ": Warning: updelay module parameter (%d), " |
| "not in range 0-%d, so it was reset to 0\n", |
| updelay, INT_MAX); |
| updelay = 0; |
| } |
| |
| if (downdelay < 0) { |
| printk(KERN_WARNING DRV_NAME |
| ": Warning: downdelay module parameter (%d), " |
| "not in range 0-%d, so it was reset to 0\n", |
| downdelay, INT_MAX); |
| downdelay = 0; |
| } |
| |
| if ((use_carrier != 0) && (use_carrier != 1)) { |
| printk(KERN_WARNING DRV_NAME |
| ": Warning: use_carrier module parameter (%d), " |
| "not of valid value (0/1), so it was set to 1\n", |
| use_carrier); |
| use_carrier = 1; |
| } |
| |
| /* reset values for 802.3ad */ |
| if (bond_mode == BOND_MODE_8023AD) { |
| if (!miimon) { |
| printk(KERN_WARNING DRV_NAME |
| ": Warning: miimon must be specified, " |
| "otherwise bonding will not detect link " |
| "failure, speed and duplex which are " |
| "essential for 802.3ad operation\n"); |
| printk(KERN_WARNING "Forcing miimon to 100msec\n"); |
| miimon = 100; |
| } |
| } |
| |
| /* reset values for TLB/ALB */ |
| if ((bond_mode == BOND_MODE_TLB) || |
| (bond_mode == BOND_MODE_ALB)) { |
| if (!miimon) { |
| printk(KERN_WARNING DRV_NAME |
| ": Warning: miimon must be specified, " |
| "otherwise bonding will not detect link " |
| "failure and link speed which are essential " |
| "for TLB/ALB load balancing\n"); |
| printk(KERN_WARNING "Forcing miimon to 100msec\n"); |
| miimon = 100; |
| } |
| } |
| |
| if (bond_mode == BOND_MODE_ALB) { |
| printk(KERN_NOTICE DRV_NAME |
| ": In ALB mode you might experience client " |
| "disconnections upon reconnection of a link if the " |
| "bonding module updelay parameter (%d msec) is " |
| "incompatible with the forwarding delay time of the " |
| "switch\n", |
| updelay); |
| } |
| |
| if (!miimon) { |
| if (updelay || downdelay) { |
| /* just warn the user the up/down delay will have |
| * no effect since miimon is zero... |
| */ |
| printk(KERN_WARNING DRV_NAME |
| ": Warning: miimon module parameter not set " |
| "and updelay (%d) or downdelay (%d) module " |
| "parameter is set; updelay and downdelay have " |
| "no effect unless miimon is set\n", |
| updelay, downdelay); |
| } |
| } else { |
| /* don't allow arp monitoring */ |
| if (arp_interval) { |
| printk(KERN_WARNING DRV_NAME |
| ": Warning: miimon (%d) and arp_interval (%d) " |
| "can't be used simultaneously, disabling ARP " |
| "monitoring\n", |
| miimon, arp_interval); |
| arp_interval = 0; |
| } |
| |
| if ((updelay % miimon) != 0) { |
| printk(KERN_WARNING DRV_NAME |
| ": Warning: updelay (%d) is not a multiple " |
| "of miimon (%d), updelay rounded to %d ms\n", |
| updelay, miimon, (updelay / miimon) * miimon); |
| } |
| |
| updelay /= miimon; |
| |
| if ((downdelay % miimon) != 0) { |
| printk(KERN_WARNING DRV_NAME |
| ": Warning: downdelay (%d) is not a multiple " |
| "of miimon (%d), downdelay rounded to %d ms\n", |
| downdelay, miimon, |
| (downdelay / miimon) * miimon); |
| } |
| |
| downdelay /= miimon; |
| } |
| |
| if (arp_interval < 0) { |
| printk(KERN_WARNING DRV_NAME |
| ": Warning: arp_interval module parameter (%d) " |
| ", not in range 0-%d, so it was reset to %d\n", |
| arp_interval, INT_MAX, BOND_LINK_ARP_INTERV); |
| arp_interval = BOND_LINK_ARP_INTERV; |
| } |
| |
| for (arp_ip_count = 0; |
| (arp_ip_count < BOND_MAX_ARP_TARGETS) && arp_ip_target[arp_ip_count]; |
| arp_ip_count++) { |
| /* not complete check, but should be good enough to |
| catch mistakes */ |
| if (!isdigit(arp_ip_target[arp_ip_count][0])) { |
| printk(KERN_WARNING DRV_NAME |
| ": Warning: bad arp_ip_target module parameter " |
| "(%s), ARP monitoring will not be performed\n", |
| arp_ip_target[arp_ip_count]); |
| arp_interval = 0; |
| } else { |
| u32 ip = in_aton(arp_ip_target[arp_ip_count]); |
| arp_target[arp_ip_count] = ip; |
| } |
| } |
| |
| if (arp_interval && !arp_ip_count) { |
| /* don't allow arping if no arp_ip_target given... */ |
| printk(KERN_WARNING DRV_NAME |
| ": Warning: arp_interval module parameter (%d) " |
| "specified without providing an arp_ip_target " |
| "parameter, arp_interval was reset to 0\n", |
| arp_interval); |
| arp_interval = 0; |
| } |
| |
| if (miimon) { |
| printk(KERN_INFO DRV_NAME |
| ": MII link monitoring set to %d ms\n", |
| miimon); |
| } else if (arp_interval) { |
| int i; |
| |
| printk(KERN_INFO DRV_NAME |
| ": ARP monitoring set to %d ms with %d target(s):", |
| arp_interval, arp_ip_count); |
| |
| for (i = 0; i < arp_ip_count; i++) |
| printk (" %s", arp_ip_target[i]); |
| |
| printk("\n"); |
| |
| } else { |
| /* miimon and arp_interval not set, we need one so things |
| * work as expected, see bonding.txt for details |
| */ |
| printk(KERN_WARNING DRV_NAME |
| ": Warning: either miimon or arp_interval and " |
| "arp_ip_target module parameters must be specified, " |
| "otherwise bonding will not detect link failures! see " |
| "bonding.txt for details.\n"); |
| } |
| |
| if (primary && !USES_PRIMARY(bond_mode)) { |
| /* currently, using a primary only makes sense |
| * in active backup, TLB or ALB modes |
| */ |
| printk(KERN_WARNING DRV_NAME |
| ": Warning: %s primary device specified but has no " |
| "effect in %s mode\n", |
| primary, bond_mode_name(bond_mode)); |
| primary = NULL; |
| } |
| |
| /* fill params struct with the proper values */ |
| params->mode = bond_mode; |
| params->miimon = miimon; |
| params->arp_interval = arp_interval; |
| params->updelay = updelay; |
| params->downdelay = downdelay; |
| params->use_carrier = use_carrier; |
| params->lacp_fast = lacp_fast; |
| params->primary[0] = 0; |
| |
| if (primary) { |
| strncpy(params->primary, primary, IFNAMSIZ); |
| params->primary[IFNAMSIZ - 1] = 0; |
| } |
| |
| memcpy(params->arp_targets, arp_target, sizeof(arp_target)); |
| |
| return 0; |
| } |
| |
| static int __init bonding_init(void) |
| { |
| struct bond_params params; |
| int i; |
| int res; |
| |
| printk(KERN_INFO "%s", version); |
| |
| res = bond_check_params(¶ms); |
| if (res) { |
| return res; |
| } |
| |
| rtnl_lock(); |
| |
| #ifdef CONFIG_PROC_FS |
| bond_create_proc_dir(); |
| #endif |
| |
| for (i = 0; i < max_bonds; i++) { |
| struct net_device *bond_dev; |
| |
| bond_dev = alloc_netdev(sizeof(struct bonding), "", ether_setup); |
| if (!bond_dev) { |
| res = -ENOMEM; |
| goto out_err; |
| } |
| |
| res = dev_alloc_name(bond_dev, "bond%d"); |
| if (res < 0) { |
| free_netdev(bond_dev); |
| goto out_err; |
| } |
| |
| /* bond_init() must be called after dev_alloc_name() (for the |
| * /proc files), but before register_netdevice(), because we |
| * need to set function pointers. |
| */ |
| res = bond_init(bond_dev, ¶ms); |
| if (res < 0) { |
| free_netdev(bond_dev); |
| goto out_err; |
| } |
| |
| SET_MODULE_OWNER(bond_dev); |
| |
| res = register_netdevice(bond_dev); |
| if (res < 0) { |
| bond_deinit(bond_dev); |
| free_netdev(bond_dev); |
| goto out_err; |
| } |
| } |
| |
| rtnl_unlock(); |
| register_netdevice_notifier(&bond_netdev_notifier); |
| |
| return 0; |
| |
| out_err: |
| /* free and unregister all bonds that were successfully added */ |
| bond_free_all(); |
| |
| rtnl_unlock(); |
| |
| return res; |
| } |
| |
| static void __exit bonding_exit(void) |
| { |
| unregister_netdevice_notifier(&bond_netdev_notifier); |
| |
| rtnl_lock(); |
| bond_free_all(); |
| rtnl_unlock(); |
| } |
| |
| module_init(bonding_init); |
| module_exit(bonding_exit); |
| MODULE_LICENSE("GPL"); |
| MODULE_VERSION(DRV_VERSION); |
| MODULE_DESCRIPTION(DRV_DESCRIPTION ", v" DRV_VERSION); |
| MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others"); |
| MODULE_SUPPORTED_DEVICE("most ethernet devices"); |
| |
| /* |
| * Local variables: |
| * c-indent-level: 8 |
| * c-basic-offset: 8 |
| * tab-width: 8 |
| * End: |
| */ |
| |
