diff options
Diffstat (limited to 'drivers/net/bonding/bond_main.c')
| -rw-r--r-- | drivers/net/bonding/bond_main.c | 781 |
1 files changed, 197 insertions, 584 deletions
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c index 94cec3cf2a13..2582d98ef5c3 100644 --- a/drivers/net/bonding/bond_main.c +++ b/drivers/net/bonding/bond_main.c @@ -29,466 +29,6 @@ * b: if a hw mac address already is there, eth0's hw mac address * will then be set from bond0. * - * v0.1 - first working version. - * v0.2 - changed stats to be calculated by summing slaves stats. - * - * Changes: - * Arnaldo Carvalho de Melo <acme@conectiva.com.br> - * - fix leaks on failure at bond_init - * - * 2000/09/30 - Willy Tarreau <willy at meta-x.org> - * - added trivial code to release a slave device. - * - fixed security bug (CAP_NET_ADMIN not checked) - * - implemented MII link monitoring to disable dead links : - * All MII capable slaves are checked every <miimon> milliseconds - * (100 ms seems good). This value can be changed by passing it to - * insmod. A value of zero disables the monitoring (default). - * - fixed an infinite loop in bond_xmit_roundrobin() when there's no - * good slave. - * - made the code hopefully SMP safe - * - * 2000/10/03 - Willy Tarreau <willy at meta-x.org> - * - optimized slave lists based on relevant suggestions from Thomas Davis - * - implemented active-backup method to obtain HA with two switches: - * stay as long as possible on the same active interface, while we - * also monitor the backup one (MII link status) because we want to know - * if we are able to switch at any time. ( pass "mode=1" to insmod ) - * - lots of stress testings because we need it to be more robust than the - * wires ! :-> - * - * 2000/10/09 - Willy Tarreau <willy at meta-x.org> - * - added up and down delays after link state change. - * - optimized the slaves chaining so that when we run forward, we never - * repass through the bond itself, but we can find it by searching - * backwards. Renders the deletion more difficult, but accelerates the - * scan. - * - smarter enslaving and releasing. - * - finer and more robust SMP locking - * - * 2000/10/17 - Willy Tarreau <willy at meta-x.org> - * - fixed two potential SMP race conditions - * - * 2000/10/18 - Willy Tarreau <willy at meta-x.org> - * - small fixes to the monitoring FSM in case of zero delays - * 2000/11/01 - Willy Tarreau <willy at meta-x.org> - * - fixed first slave not automatically used in trunk mode. - * 2000/11/10 : spelling of "EtherChannel" corrected. - * 2000/11/13 : fixed a race condition in case of concurrent accesses to ioctl(). - * 2000/12/16 : fixed improper usage of rtnl_exlock_nowait(). - * - * 2001/1/3 - Chad N. Tindel <ctindel at ieee dot org> - * - The bonding driver now simulates MII status monitoring, just like - * a normal network device. It will show that the link is down iff - * every slave in the bond shows that their links are down. If at least - * one slave is up, the bond's MII status will appear as up. - * - * 2001/2/7 - Chad N. Tindel <ctindel at ieee dot org> - * - Applications can now query the bond from user space to get - * information which may be useful. They do this by calling - * the BOND_INFO_QUERY ioctl. Once the app knows how many slaves - * are in the bond, it can call the BOND_SLAVE_INFO_QUERY ioctl to - * get slave specific information (# link failures, etc). See - * <linux/if_bonding.h> for more details. The structs of interest - * are ifbond and ifslave. - * - * 2001/4/5 - Chad N. Tindel <ctindel at ieee dot org> - * - Ported to 2.4 Kernel - * - * 2001/5/2 - Jeffrey E. Mast <jeff at mastfamily dot com> - * - When a device is detached from a bond, the slave device is no longer - * left thinking that is has a master. - * - * 2001/5/16 - Jeffrey E. Mast <jeff at mastfamily dot com> - * - memset did not appropriately initialized the bond rw_locks. Used - * rwlock_init to initialize to unlocked state to prevent deadlock when - * first attempting a lock - * - Called SET_MODULE_OWNER for bond device - * - * 2001/5/17 - Tim Anderson <tsa at mvista.com> - * - 2 paths for releasing for slave release; 1 through ioctl - * and 2) through close. Both paths need to release the same way. - * - the free slave in bond release is changing slave status before - * the free. The netdev_set_master() is intended to change slave state - * so it should not be done as part of the release process. - * - Simple rule for slave state at release: only the active in A/B and - * only one in the trunked case. - * - * 2001/6/01 - Tim Anderson <tsa at mvista.com> - * - Now call dev_close when releasing a slave so it doesn't screw up - * out routing table. - * - * 2001/6/01 - Chad N. Tindel <ctindel at ieee dot org> - * - Added /proc support for getting bond and slave information. - * Information is in /proc/net/<bond device>/info. - * - Changed the locking when calling bond_close to prevent deadlock. - * - * 2001/8/05 - Janice Girouard <girouard at us.ibm.com> - * - correct problem where refcnt of slave is not incremented in bond_ioctl - * so the system hangs when halting. - * - correct locking problem when unable to malloc in bond_enslave. - * - adding bond_xmit_xor logic. - * - adding multiple bond device support. - * - * 2001/8/13 - Erik Habbinga <erik_habbinga at hp dot com> - * - correct locking problem with rtnl_exlock_nowait - * - * 2001/8/23 - Janice Girouard <girouard at us.ibm.com> - * - bzero initial dev_bonds, to correct oops - * - convert SIOCDEVPRIVATE to new MII ioctl calls - * - * 2001/9/13 - Takao Indoh <indou dot takao at jp dot fujitsu dot com> - * - Add the BOND_CHANGE_ACTIVE ioctl implementation - * - * 2001/9/14 - Mark Huth <mhuth at mvista dot com> - * - Change MII_LINK_READY to not check for end of auto-negotiation, - * but only for an up link. - * - * 2001/9/20 - Chad N. Tindel <ctindel at ieee dot org> - * - Add the device field to bonding_t. Previously the net_device - * corresponding to a bond wasn't available from the bonding_t - * structure. - * - * 2001/9/25 - Janice Girouard <girouard at us.ibm.com> - * - add arp_monitor for active backup mode - * - * 2001/10/23 - Takao Indoh <indou dot takao at jp dot fujitsu dot com> - * - Various memory leak fixes - * - * 2001/11/5 - Mark Huth <mark dot huth at mvista dot com> - * - Don't take rtnl lock in bond_mii_monitor as it deadlocks under - * certain hotswap conditions. - * Note: this same change may be required in bond_arp_monitor ??? - * - Remove possibility of calling bond_sethwaddr with NULL slave_dev ptr - * - Handle hot swap ethernet interface deregistration events to remove - * kernel oops following hot swap of enslaved interface - * - * 2002/1/2 - Chad N. Tindel <ctindel at ieee dot org> - * - Restore original slave flags at release time. - * - * 2002/02/18 - Erik Habbinga <erik_habbinga at hp dot com> - * - bond_release(): calling kfree on our_slave after call to - * bond_restore_slave_flags, not before - * - bond_enslave(): saving slave flags into original_flags before - * call to netdev_set_master, so the IFF_SLAVE flag doesn't end - * up in original_flags - * - * 2002/04/05 - Mark Smith <mark.smith at comdev dot cc> and - * Steve Mead <steve.mead at comdev dot cc> - * - Port Gleb Natapov's multicast support patchs from 2.4.12 - * to 2.4.18 adding support for multicast. - * - * 2002/06/10 - Tony Cureington <tony.cureington * hp_com> - * - corrected uninitialized pointer (ifr.ifr_data) in bond_check_dev_link; - * actually changed function to use MIIPHY, then MIIREG, and finally - * ETHTOOL to determine the link status - * - fixed bad ifr_data pointer assignments in bond_ioctl - * - corrected mode 1 being reported as active-backup in bond_get_info; - * also added text to distinguish type of load balancing (rr or xor) - * - change arp_ip_target module param from "1-12s" (array of 12 ptrs) - * to "s" (a single ptr) - * - * 2002/08/30 - Jay Vosburgh <fubar at us dot ibm dot com> - * - Removed acquisition of xmit_lock in set_multicast_list; caused - * deadlock on SMP (lock is held by caller). - * - Revamped SIOCGMIIPHY, SIOCGMIIREG portion of bond_check_dev_link(). - * - * 2002/09/18 - Jay Vosburgh <fubar at us dot ibm dot com> - * - Fixed up bond_check_dev_link() (and callers): removed some magic - * numbers, banished local MII_ defines, wrapped ioctl calls to - * prevent EFAULT errors - * - * 2002/9/30 - Jay Vosburgh <fubar at us dot ibm dot com> - * - make sure the ip target matches the arp_target before saving the - * hw address. - * - * 2002/9/30 - Dan Eisner <eisner at 2robots dot com> - * - make sure my_ip is set before taking down the link, since - * not all switches respond if the source ip is not set. - * - * 2002/10/8 - Janice Girouard <girouard at us dot ibm dot com> - * - read in the local ip address when enslaving a device - * - add primary support - * - make sure 2*arp_interval has passed when a new device - * is brought on-line before taking it down. - * - * 2002/09/11 - Philippe De Muyter <phdm at macqel dot be> - * - Added bond_xmit_broadcast logic. - * - Added bond_mode() support function. - * - * 2002/10/26 - Laurent Deniel <laurent.deniel at free.fr> - * - allow to register multicast addresses only on active slave - * (useful in active-backup mode) - * - add multicast module parameter - * - fix deletion of multicast groups after unloading module - * - * 2002/11/06 - Kameshwara Rayaprolu <kameshwara.rao * wipro_com> - * - Changes to prevent panic from closing the device twice; if we close - * the device in bond_release, we must set the original_flags to down - * so it won't be closed again by the network layer. - * - * 2002/11/07 - Tony Cureington <tony.cureington * hp_com> - * - Fix arp_target_hw_addr memory leak - * - Created activebackup_arp_monitor function to handle arp monitoring - * in active backup mode - the bond_arp_monitor had several problems... - * such as allowing slaves to tx arps sequentially without any delay - * for a response - * - Renamed bond_arp_monitor to loadbalance_arp_monitor and re-wrote - * this function to just handle arp monitoring in load-balancing mode; - * it is a lot more compact now - * - Changes to ensure one and only one slave transmits in active-backup - * mode - * - Robustesize parameters; warn users about bad combinations of - * parameters; also if miimon is specified and a network driver does - * not support MII or ETHTOOL, inform the user of this - * - Changes to support link_failure_count when in arp monitoring mode - * - Fix up/down delay reported in /proc - * - Added version; log version; make version available from "modinfo -d" - * - Fixed problem in bond_check_dev_link - if the first IOCTL (SIOCGMIIPH) - * failed, the ETHTOOL ioctl never got a chance - * - * 2002/11/16 - Laurent Deniel <laurent.deniel at free.fr> - * - fix multicast handling in activebackup_arp_monitor - * - remove one unnecessary and confusing curr_active_slave == slave test - * in activebackup_arp_monitor - * - * 2002/11/17 - Laurent Deniel <laurent.deniel at free.fr> - * - fix bond_slave_info_query when slave_id = num_slaves - * - * 2002/11/19 - Janice Girouard <girouard at us dot ibm dot com> - * - correct ifr_data reference. Update ifr_data reference - * to mii_ioctl_data struct values to avoid confusion. - * - * 2002/11/22 - Bert Barbe <bert.barbe at oracle dot com> - * - Add support for multiple arp_ip_target - * - * 2002/12/13 - Jay Vosburgh <fubar at us dot ibm dot com> - * - Changed to allow text strings for mode and multicast, e.g., - * insmod bonding mode=active-backup. The numbers still work. - * One change: an invalid choice will cause module load failure, - * rather than the previous behavior of just picking one. - * - Minor cleanups; got rid of dup ctype stuff, atoi function - * - * 2003/02/07 - Jay Vosburgh <fubar at us dot ibm dot com> - * - Added use_carrier module parameter that causes miimon to - * use netif_carrier_ok() test instead of MII/ETHTOOL ioctls. - * - Minor cleanups; consolidated ioctl calls to one function. - * - * 2003/02/07 - Tony Cureington <tony.cureington * hp_com> - * - Fix bond_mii_monitor() logic error that could result in - * bonding round-robin mode ignoring links after failover/recovery - * - * 2003/03/17 - Jay Vosburgh <fubar at us dot ibm dot com> - * - kmalloc fix (GFP_KERNEL to GFP_ATOMIC) reported by - * Shmulik dot Hen at intel.com. - * - Based on discussion on mailing list, changed use of - * update_slave_cnt(), created wrapper functions for adding/removing - * slaves, changed bond_xmit_xor() to check slave_cnt instead of - * checking slave and slave->dev (which only worked by accident). - * - Misc code cleanup: get arp_send() prototype from header file, - * add max_bonds to bonding.txt. - * - * 2003/03/18 - Tsippy Mendelson <tsippy.mendelson at intel dot com> and - * Shmulik Hen <shmulik.hen at intel dot com> - * - Make sure only bond_attach_slave() and bond_detach_slave() can - * manipulate the slave list, including slave_cnt, even when in - * bond_release_all(). - * - Fixed hang in bond_release() with traffic running: - * netdev_set_master() must not be called from within the bond lock. - * - * 2003/03/18 - Tsippy Mendelson <tsippy.mendelson at intel dot com> and - * Shmulik Hen <shmulik.hen at intel dot com> - * - Fixed hang in bond_enslave() with traffic running: - * netdev_set_master() must not be called from within the bond lock. - * - * 2003/03/18 - Amir Noam <amir.noam at intel dot com> - * - Added support for getting slave's speed and duplex via ethtool. - * Needed for 802.3ad and other future modes. - * - * 2003/03/18 - Tsippy Mendelson <tsippy.mendelson at intel dot com> and - * Shmulik Hen <shmulik.hen at intel dot com> - * - Enable support of modes that need to use the unique mac address of - * each slave. - * * bond_enslave(): Moved setting the slave's mac address, and - * openning it, from the application to the driver. This breaks - * backward comaptibility with old versions of ifenslave that open - * the slave before enalsving it !!!. - * * bond_release(): The driver also takes care of closing the slave - * and restoring its original mac address. - * - Removed the code that restores all base driver's flags. - * Flags are automatically restored once all undo stages are done - * properly. - * - Block possibility of enslaving before the master is up. This - * prevents putting the system in an unstable state. - * - * 2003/03/18 - Amir Noam <amir.noam at intel dot com>, - * Tsippy Mendelson <tsippy.mendelson at intel dot com> and - * Shmulik Hen <shmulik.hen at intel dot com> - * - Added support for IEEE 802.3ad Dynamic link aggregation mode. - * - * 2003/05/01 - Amir Noam <amir.noam at intel dot com> - * - Added ABI version control to restore compatibility between - * new/old ifenslave and new/old bonding. - * - * 2003/05/01 - Shmulik Hen <shmulik.hen at intel dot com> - * - Fixed bug in bond_release_all(): save old value of curr_active_slave - * before setting it to NULL. - * - Changed driver versioning scheme to include version number instead - * of release date (that is already in another field). There are 3 - * fields X.Y.Z where: - * X - Major version - big behavior changes - * Y - Minor version - addition of features - * Z - Extra version - minor changes and bug fixes - * The current version is 1.0.0 as a base line. - * - * 2003/05/01 - Tsippy Mendelson <tsippy.mendelson at intel dot com> and - * Amir Noam <amir.noam at intel dot com> - * - Added support for lacp_rate module param. - * - Code beautification and style changes (mainly in comments). - * new version - 1.0.1 - * - * 2003/05/01 - Shmulik Hen <shmulik.hen at intel dot com> - * - Based on discussion on mailing list, changed locking scheme - * to use lock/unlock or lock_bh/unlock_bh appropriately instead - * of lock_irqsave/unlock_irqrestore. The new scheme helps exposing - * hidden bugs and solves system hangs that occurred due to the fact - * that holding lock_irqsave doesn't prevent softirqs from running. - * This also increases total throughput since interrupts are not - * blocked on each transmitted packets or monitor timeout. - * new version - 2.0.0 - * - * 2003/05/01 - Shmulik Hen <shmulik.hen at intel dot com> - * - Added support for Transmit load balancing mode. - * - Concentrate all assignments of curr_active_slave to a single point - * so specific modes can take actions when the primary adapter is - * changed. - * - Take the updelay parameter into consideration during bond_enslave - * since some adapters loose their link during setting the device. - * - Renamed bond_3ad_link_status_changed() to - * bond_3ad_handle_link_change() for compatibility with TLB. - * new version - 2.1.0 - * - * 2003/05/01 - Tsippy Mendelson <tsippy.mendelson at intel dot com> - * - Added support for Adaptive load balancing mode which is - * equivalent to Transmit load balancing + Receive load balancing. - * new version - 2.2.0 - * - * 2003/05/15 - Jay Vosburgh <fubar at us dot ibm dot com> - * - Applied fix to activebackup_arp_monitor posted to bonding-devel - * by Tony Cureington <tony.cureington * hp_com>. Fixes ARP - * monitor endless failover bug. Version to 2.2.10 - * - * 2003/05/20 - Amir Noam <amir.noam at intel dot com> - * - Fixed bug in ABI version control - Don't commit to a specific - * ABI version if receiving unsupported ioctl commands. - * - * 2003/05/22 - Jay Vosburgh <fubar at us dot ibm dot com> - * - Fix ifenslave -c causing bond to loose existing routes; - * added bond_set_mac_address() that doesn't require the - * bond to be down. - * - In conjunction with fix for ifenslave -c, in - * bond_change_active(), changing to the already active slave - * is no longer an error (it successfully does nothing). - * - * 2003/06/30 - Amir Noam <amir.noam at intel dot com> - * - Fixed bond_change_active() for ALB/TLB modes. - * Version to 2.2.14. - * - * 2003/07/29 - Amir Noam <amir.noam at intel dot com> - * - Fixed ARP monitoring bug. - * Version to 2.2.15. - * - * 2003/07/31 - Willy Tarreau <willy at ods dot org> - * - Fixed kernel panic when using ARP monitoring without - * setting bond's IP address. - * Version to 2.2.16. - * - * 2003/08/06 - Amir Noam <amir.noam at intel dot com> - * - Back port from 2.6: use alloc_netdev(); fix /proc handling; - * made stats a part of bond struct so no need to allocate - * and free it separately; use standard list operations instead - * of pre-allocated array of bonds. - * Version to 2.3.0. - * - * 2003/08/07 - Jay Vosburgh <fubar at us dot ibm dot com>, - * Amir Noam <amir.noam at intel dot com> and - * Shmulik Hen <shmulik.hen at intel dot com> - * - Propagating master's settings: Distinguish between modes that - * use a primary slave from those that don't, and propagate settings - * accordingly; Consolidate change_active opeartions and add - * reselect_active and find_best opeartions; Decouple promiscuous - * handling from the multicast mode setting; Add support for changing - * HW address and MTU with proper unwind; Consolidate procfs code, - * add CHANGENAME handler; Enhance netdev notification handling. - * Version to 2.4.0. - * - * 2003/09/15 - Stephen Hemminger <shemminger at osdl dot org>, - * Amir Noam <amir.noam at intel dot com> - * - Convert /proc to seq_file interface. - * Change /proc/net/bondX/info to /proc/net/bonding/bondX. - * Set version to 2.4.1. - * - * 2003/11/20 - Amir Noam <amir.noam at intel dot com> - * - Fix /proc creation/destruction. - * - * 2003/12/01 - Shmulik Hen <shmulik.hen at intel dot com> - * - Massive cleanup - Set version to 2.5.0 - * Code changes: - * o Consolidate format of prints and debug prints. - * o Remove bonding_t/slave_t typedefs and consolidate all casts. - * o Remove dead code and unnecessary checks. - * o Consolidate starting/stopping timers. - * o Consolidate handling of primary module param throughout the code. - * o Removed multicast module param support - all settings are done - * according to mode. - * o Slave list iteration - bond is no longer part of the list, - * added cyclic list iteration macros. - * o Consolidate error handling in all xmit functions. - * Style changes: - * o Consolidate function naming and declarations. - * o Consolidate function params and local variables names. - * o Consolidate return values. - * o Consolidate curly braces. - * o Consolidate conditionals format. - * o Change struct member names and types. - * o Chomp trailing spaces, remove empty lines, fix indentations. - * o Re-organize code according to context. - * - * 2003/12/30 - Amir Noam <amir.noam at intel dot com> - * - Fixed: Cannot remove and re-enslave the original active slave. - * - Fixed: Releasing the original active slave causes mac address - * duplication. - * - Add support for slaves that use ethtool_ops. - * Set version to 2.5.3. - * - * 2004/01/05 - Amir Noam <amir.noam at intel dot com> - * - Save bonding parameters per bond instead of using the global values. - * Set version to 2.5.4. - * - * 2004/01/14 - Shmulik Hen <shmulik.hen at intel dot com> - * - Enhance VLAN support: - * * Add support for VLAN hardware acceleration capable slaves. - * * Add capability to tag self generated packets in ALB/TLB modes. - * Set version to 2.6.0. - * 2004/10/29 - Mitch Williams <mitch.a.williams at intel dot com> - * - Fixed bug when unloading module while using 802.3ad. If - * spinlock debugging is turned on, this causes a stack dump. - * Solution is to move call to dev_remove_pack outside of the - * spinlock. - * Set version to 2.6.1. - * 2005/06/05 - Jay Vosburgh <fubar@us.ibm.com> - * - Support for generating gratuitous ARPs in active-backup mode. - * Includes support for VLAN tagging all bonding-generated ARPs - * as needed. Set version to 2.6.2. - * 2005/06/08 - Jason Gabler <jygabler at lbl dot gov> - * - alternate hashing policy support for mode 2 - * * Added kernel parameter "xmit_hash_policy" to allow the selection - * of different hashing policies for mode 2. The original mode 2 - * policy is the default, now found in xmit_hash_policy_layer2(). - * * Added xmit_hash_policy_layer34() - * - Modified by Jay Vosburgh <fubar@us.ibm.com> to also support mode 4. - * Set version to 2.6.3. - * 2005/09/26 - Jay Vosburgh <fubar@us.ibm.com> - * - Removed backwards compatibility for old ifenslaves. Version 2.6.4. */ //#define BONDING_DEBUG 1 @@ -557,6 +97,7 @@ static char *lacp_rate = NULL; static char *xmit_hash_policy = NULL; static int arp_interval = BOND_LINK_ARP_INTERV; static char *arp_ip_target[BOND_MAX_ARP_TARGETS] = { NULL, }; +struct bond_params bonding_defaults; module_param(max_bonds, int, 0); MODULE_PARM_DESC(max_bonds, "Max number of bonded devices"); @@ -565,17 +106,24 @@ 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_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_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_PARM_DESC(mode, "Mode of operation : 0 for balance-rr, " + "1 for active-backup, 2 for balance-xor, " + "3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, " + "6 for balance-alb"); 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_PARM_DESC(lacp_rate, "LACPDU tx rate to request from 802.3ad partner " + "(slow/fast)"); module_param(xmit_hash_policy, charp, 0); -MODULE_PARM_DESC(xmit_hash_policy, "XOR hashing method : 0 for layer 2 (default), 1 for layer 3+4"); +MODULE_PARM_DESC(xmit_hash_policy, "XOR hashing method: 0 for layer 2 (default)" + ", 1 for layer 3+4"); module_param(arp_interval, int, 0); MODULE_PARM_DESC(arp_interval, "arp interval in milliseconds"); module_param_array(arp_ip_target, charp, NULL, 0); @@ -586,30 +134,27 @@ MODULE_PARM_DESC(arp_ip_target, "arp targets in n.n.n.n form"); static const char *version = DRV_DESCRIPTION ": v" DRV_VERSION " (" DRV_RELDATE ")\n"; -static LIST_HEAD(bond_dev_list); +LIST_HEAD(bond_dev_list); #ifdef CONFIG_PROC_FS static struct proc_dir_entry *bond_proc_dir = NULL; #endif +extern struct rw_semaphore bonding_rwsem; static u32 arp_target[BOND_MAX_ARP_TARGETS] = { 0, } ; static int arp_ip_count = 0; static int bond_mode = BOND_MODE_ROUNDROBIN; static int xmit_hashtype= BOND_XMIT_POLICY_LAYER2; static int lacp_fast = 0; -struct bond_parm_tbl { - char *modename; - int mode; -}; -static struct bond_parm_tbl bond_lacp_tbl[] = { +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[] = { +struct bond_parm_tbl bond_mode_tbl[] = { { "balance-rr", BOND_MODE_ROUNDROBIN}, { "active-backup", BOND_MODE_ACTIVEBACKUP}, { "balance-xor", BOND_MODE_XOR}, @@ -620,7 +165,7 @@ static struct bond_parm_tbl bond_mode_tbl[] = { { NULL, -1}, }; -static struct bond_parm_tbl xmit_hashtype_tbl[] = { +struct bond_parm_tbl xmit_hashtype_tbl[] = { { "layer2", BOND_XMIT_POLICY_LAYER2}, { "layer3+4", BOND_XMIT_POLICY_LAYER34}, { NULL, -1}, @@ -628,12 +173,11 @@ static struct bond_parm_tbl xmit_hashtype_tbl[] = { /*-------------------------- Forward declarations ---------------------------*/ -static inline void bond_set_mode_ops(struct bonding *bond, int mode); static void bond_send_gratuitous_arp(struct bonding *bond); /*---------------------------- General routines -----------------------------*/ -static const char *bond_mode_name(int mode) +const char *bond_mode_name(int mode) { switch (mode) { case BOND_MODE_ROUNDROBIN : @@ -910,7 +454,7 @@ static void bond_vlan_rx_add_vid(struct net_device *bond_dev, uint16_t vid) res = bond_add_vlan(bond, vid); if (res) { printk(KERN_ERR DRV_NAME - ": %s: Failed to add vlan id %d\n", + ": %s: Error: Failed to add vlan id %d\n", bond_dev->name, vid); } } @@ -944,7 +488,7 @@ static void bond_vlan_rx_kill_vid(struct net_device *bond_dev, uint16_t vid) res = bond_del_vlan(bond, vid); if (res) { printk(KERN_ERR DRV_NAME - ": %s: Failed to remove vlan id %d\n", + ": %s: Error: Failed to remove vlan id %d\n", bond_dev->name, vid); } } @@ -1449,7 +993,7 @@ static struct slave *bond_find_best_slave(struct bonding *bond) * * Warning: Caller must hold curr_slave_lock for writing. */ -static void bond_change_active_slave(struct bonding *bond, struct slave *new_active) +void bond_change_active_slave(struct bonding *bond, struct slave *new_active) { struct slave *old_active = bond->curr_active_slave; @@ -1523,7 +1067,7 @@ static void bond_change_active_slave(struct bonding *bond, struct slave *new_act * * Warning: Caller must hold curr_slave_lock for writing. */ -static void bond_select_active_slave(struct bonding *bond) +void bond_select_active_slave(struct bonding *bond) { struct slave *best_slave; @@ -1591,7 +1135,7 @@ static void bond_detach_slave(struct bonding *bond, struct slave *slave) /*---------------------------------- IOCTL ----------------------------------*/ -static int bond_sethwaddr(struct net_device *bond_dev, struct net_device *slave_dev) +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); @@ -1631,7 +1175,7 @@ static int bond_compute_features(struct bonding *bond) } /* enslave device <slave> to bond device <master> */ -static int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev) +int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev) { struct bonding *bond = bond_dev->priv; struct slave *new_slave = NULL; @@ -1644,8 +1188,8 @@ static int bond_enslave(struct net_device *bond_dev, struct net_device *slave_de if (!bond->params.use_carrier && slave_dev->ethtool_ops == NULL && slave_dev->do_ioctl == NULL) { printk(KERN_WARNING DRV_NAME - ": Warning : no link monitoring support for %s\n", - slave_dev->name); + ": %s: Warning: no link monitoring support for %s\n", + bond_dev->name, slave_dev->name); } /* bond must be initialized by bond_open() before enslaving */ @@ -1666,17 +1210,17 @@ static int bond_enslave(struct net_device *bond_dev, struct net_device *slave_de 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 " + ": %s: Error: cannot enslave VLAN " "challenged slave %s on VLAN enabled " - "bond %s\n", slave_dev->name, + "bond %s\n", bond_dev->name, slave_dev->name, bond_dev->name); return -EPERM; } else { printk(KERN_WARNING DRV_NAME - ": Warning: enslaved VLAN challenged " + ": %s: 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, slave_dev->name, slave_dev->name, bond_dev->name); bond_dev->features |= NETIF_F_VLAN_CHALLENGED; } @@ -1706,12 +1250,11 @@ static int bond_enslave(struct net_device *bond_dev, struct net_device *slave_de 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; + ": %s: Error: The slave device you specified does " + "not support setting the MAC address. " + "Your kernel likely does not support slave " + "devices.\n", bond_dev->name); + res = -EOPNOTSUPP; goto err_undo_flags; } @@ -1827,21 +1370,21 @@ static int bond_enslave(struct net_device *bond_dev, struct net_device *slave_de * the messages for netif_carrier. */ printk(KERN_WARNING DRV_NAME - ": Warning: MII and ETHTOOL support not " + ": %s: 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); + bond_dev->name, 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 " + ": %s: 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); + bond_dev->name, slave_dev->name); } } @@ -1868,15 +1411,15 @@ static int bond_enslave(struct net_device *bond_dev, struct net_device *slave_de 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, " + ": %s: Warning: failed to get speed and duplex from %s, " "assumed to be 100Mb/sec and Full.\n", - new_slave->dev->name); + bond_dev->name, new_slave->dev->name); if (bond->params.mode == BOND_MODE_8023AD) { - printk(KERN_WARNING - "Operation of 802.3ad mode requires ETHTOOL " + printk(KERN_WARNING DRV_NAME + ": %s: Warning: Operation of 802.3ad mode requires ETHTOOL " "support in base driver for proper aggregator " - "selection.\n"); + "selection.\n", bond_dev->name); } } @@ -1958,6 +1501,10 @@ static int bond_enslave(struct net_device *bond_dev, struct net_device *slave_de write_unlock_bh(&bond->lock); + res = bond_create_slave_symlinks(bond_dev, slave_dev); + if (res) + goto err_unset_master; + printk(KERN_INFO DRV_NAME ": %s: enslaving %s as a%s interface with a%s link.\n", bond_dev->name, slave_dev->name, @@ -1999,7 +1546,7 @@ err_undo_flags: * 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) +int bond_release(struct net_device *bond_dev, struct net_device *slave_dev) { struct bonding *bond = bond_dev->priv; struct slave *slave, *oldcurrent; @@ -2010,7 +1557,7 @@ static int bond_release(struct net_device *bond_dev, struct net_device *slave_de if (!(slave_dev->flags & IFF_SLAVE) || (slave_dev->master != bond_dev)) { printk(KERN_ERR DRV_NAME - ": Error: %s: cannot release %s.\n", + ": %s: Error: cannot release %s.\n", bond_dev->name, slave_dev->name); return -EINVAL; } @@ -2031,11 +1578,12 @@ static int bond_release(struct net_device *bond_dev, struct net_device *slave_de ETH_ALEN); if (!mac_addr_differ && (bond->slave_cnt > 1)) { printk(KERN_WARNING DRV_NAME - ": Warning: the permanent HWaddr of %s " + ": %s: 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", + bond_dev->name, slave_dev->name, slave->perm_hwaddr[0], slave->perm_hwaddr[1], @@ -2111,24 +1659,28 @@ static int bond_release(struct net_device *bond_dev, struct net_device *slave_de bond_dev->features |= NETIF_F_VLAN_CHALLENGED; } else { printk(KERN_WARNING DRV_NAME - ": Warning: clearing HW address of %s while it " + ": %s: Warning: clearing HW address of %s while it " "still has VLANs.\n", - bond_dev->name); + bond_dev->name, bond_dev->name); printk(KERN_WARNING DRV_NAME - ": When re-adding slaves, make sure the bond's " - "HW address matches its VLANs'.\n"); + ": %s: When re-adding slaves, make sure the bond's " + "HW address matches its VLANs'.\n", + bond_dev->name); } } else if ((bond_dev->features & NETIF_F_VLAN_CHALLENGED) && !bond_has_challenged_slaves(bond)) { printk(KERN_INFO DRV_NAME - ": last VLAN challenged slave %s " + ": %s: last VLAN challenged slave %s " "left bond %s. VLAN blocking is removed\n", - slave_dev->name, bond_dev->name); + bond_dev->name, slave_dev->name, bond_dev->name); bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED; } write_unlock_bh(&bond->lock); + /* must do this from outside any spinlocks */ + bond_destroy_slave_symlinks(bond_dev, slave_dev); + bond_del_vlans_from_slave(bond, slave_dev); /* If the mode USES_PRIMARY, then we should only remove its @@ -2220,6 +1772,7 @@ static int bond_release_all(struct net_device *bond_dev) */ write_unlock_bh(&bond->lock); + bond_destroy_slave_symlinks(bond_dev, slave_dev); bond_del_vlans_from_slave(bond, slave_dev); /* If the mode USES_PRIMARY, then we should only remove its @@ -2274,12 +1827,13 @@ static int bond_release_all(struct net_device *bond_dev) bond_dev->features |= NETIF_F_VLAN_CHALLENGED; } else { printk(KERN_WARNING DRV_NAME - ": Warning: clearing HW address of %s while it " + ": %s: Warning: clearing HW address of %s while it " "still has VLANs.\n", - bond_dev->name); + bond_dev->name, bond_dev->name); printk(KERN_WARNING DRV_NAME - ": When re-adding slaves, make sure the bond's " - "HW address matches its VLANs'.\n"); + ": %s: When re-adding slaves, make sure the bond's " + "HW address matches its VLANs'.\n", + bond_dev->name); } printk(KERN_INFO DRV_NAME @@ -2397,7 +1951,7 @@ static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *in /*-------------------------------- Monitoring -------------------------------*/ /* this function is called regularly to monitor each slave's link. */ -static void bond_mii_monitor(struct net_device *bond_dev) +void bond_mii_monitor(struct net_device *bond_dev) { struct bonding *bond = bond_dev->priv; struct slave *slave, *oldcurrent; @@ -2596,8 +2150,11 @@ static void bond_mii_monitor(struct net_device *bond_dev) break; default: /* Should not happen */ - printk(KERN_ERR "bonding: Error: %s Illegal value (link=%d)\n", - slave->dev->name, slave->link); + printk(KERN_ERR DRV_NAME + ": %s: Error: %s Illegal value (link=%d)\n", + bond_dev->name, + slave->dev->name, + slave->link); goto out; } /* end of switch (slave->link) */ @@ -2721,7 +2278,9 @@ static void bond_arp_send_all(struct bonding *bond, struct slave *slave) struct flowi fl; struct rtable *rt; - for (i = 0; (i < BOND_MAX_ARP_TARGETS) && targets[i]; i++) { + for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) { + if (!targets[i]) + continue; dprintk("basa: target %x\n", targets[i]); if (list_empty(&bond->vlan_list)) { dprintk("basa: empty vlan: arp_send\n"); @@ -2825,7 +2384,7 @@ static void bond_send_gratuitous_arp(struct bonding *bond) * 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) +void bond_loadbalance_arp_mon(struct net_device *bond_dev) { struct bonding *bond = bond_dev->priv; struct slave *slave, *oldcurrent; @@ -2963,7 +2522,7 @@ out: * 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) +void bond_activebackup_arp_mon(struct net_device *bond_dev) { struct bonding *bond = bond_dev->priv; struct slave *slave; @@ -3249,6 +2808,8 @@ static void bond_info_show_master(struct seq_file *seq) { struct bonding *bond = seq->private; struct slave *curr; + int i; + u32 target; read_lock(&bond->curr_slave_lock); curr = bond->curr_active_slave; @@ -3257,10 +2818,17 @@ static void bond_info_show_master(struct seq_file *seq) seq_printf(seq, "Bonding Mode: %s\n", bond_mode_name(bond->params.mode)); + if (bond->params.mode == BOND_MODE_XOR || + bond->params.mode == BOND_MODE_8023AD) { + seq_printf(seq, "Transmit Hash Policy: %s (%d)\n", + xmit_hashtype_tbl[bond->params.xmit_policy].modename, + bond->params.xmit_policy); + } + if (USES_PRIMARY(bond->params.mode)) { seq_printf(seq, "Primary Slave: %s\n", - (bond->params.primary[0]) ? - bond->params.primary : "None"); + (bond->primary_slave) ? + bond->primary_slave->dev->name : "None"); seq_printf(seq, "Currently Active Slave: %s\n", (curr) ? curr->dev->name : "None"); @@ -3273,6 +2841,27 @@ static void bond_info_show_master(struct seq_file *seq) seq_printf(seq, "Down Delay (ms): %d\n", bond->params.downdelay * bond->params.miimon); + + /* ARP information */ + if(bond->params.arp_interval > 0) { + int printed=0; + seq_printf(seq, "ARP Polling Interval (ms): %d\n", + bond->params.arp_interval); + + seq_printf(seq, "ARP IP target/s (n.n.n.n form):"); + + for(i = 0; (i < BOND_MAX_ARP_TARGETS) ;i++) { + if (!bond->params.arp_targets[i]) + continue; + if (printed) + seq_printf(seq, ","); + target = ntohl(bond->params.arp_targets[i]); + seq_printf(seq, " %d.%d.%d.%d", HIPQUAD(target)); + printed = 1; + } + seq_printf(seq, "\n"); + } + if (bond->params.mode == BOND_MODE_8023AD) { struct ad_info ad_info; @@ -3478,7 +3067,10 @@ static int bond_event_changename(struct bonding *bond) bond_remove_proc_entry(bond); bond_create_proc_entry(bond); #endif - + down_write(&(bonding_rwsem)); + bond_destroy_sysfs_entry(bond); + bond_create_sysfs_entry(bond); + up_write(&(bonding_rwsem)); return NOTIFY_DONE; } @@ -3955,6 +3547,7 @@ static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd return -EPERM; } + down_write(&(bonding_rwsem)); slave_dev = dev_get_by_name(ifr->ifr_slave); dprintk("slave_dev=%p: \n", slave_dev); @@ -3987,6 +3580,7 @@ static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd dev_put(slave_dev); } + up_write(&(bonding_rwsem)); return res; } @@ -4071,6 +3665,7 @@ static int bond_change_mtu(struct net_device *bond_dev, int new_mtu) 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) { @@ -4397,8 +3992,9 @@ static int bond_xmit_broadcast(struct sk_buff *skb, struct net_device *bond_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"); + ": %s: Error: bond_xmit_broadcast(): " + "skb_clone() failed\n", + bond_dev->name); continue; } @@ -4431,7 +4027,7 @@ out: /* * set bond mode specific net device operations */ -static inline void bond_set_mode_ops(struct bonding *bond, int mode) +void bond_set_mode_ops(struct bonding *bond, int mode) { struct net_device *bond_dev = bond->dev; @@ -4467,7 +4063,8 @@ static inline void bond_set_mode_ops(struct bonding *bond, int mode) default: /* Should never happen, mode already checked */ printk(KERN_ERR DRV_NAME - ": Error: Unknown bonding mode %d\n", + ": %s: Error: Unknown bonding mode %d\n", + bond_dev->name, mode); break; } @@ -4491,7 +4088,7 @@ static struct ethtool_ops bond_ethtool_ops = { * 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) +static int bond_init(struct net_device *bond_dev, struct bond_params *params) { struct bonding *bond = bond_dev->priv; @@ -4565,7 +4162,7 @@ static int __init bond_init(struct net_device *bond_dev, struct bond_params *par /* De-initialize device specific data. * Caller must hold rtnl_lock. */ -static inline void bond_deinit(struct net_device *bond_dev) +void bond_deinit(struct net_device *bond_dev) { struct bonding *bond = bond_dev->priv; @@ -4601,7 +4198,7 @@ static void bond_free_all(void) * 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 bond_parse_parm(char *mode_arg, struct bond_parm_tbl *tbl) { int i; @@ -4670,7 +4267,7 @@ static int bond_check_params(struct bond_params *params) 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)", + "was reset to BOND_DEFAULT_MAX_BONDS (%d)\n", max_bonds, 1, INT_MAX, BOND_DEFAULT_MAX_BONDS); max_bonds = BOND_DEFAULT_MAX_BONDS; } @@ -4881,81 +4478,96 @@ static int bond_check_params(struct bond_params *params) return 0; } +/* Create a new bond based on the specified name and bonding parameters. + * Caller must NOT hold rtnl_lock; we need to release it here before we + * set up our sysfs entries. + */ +int bond_create(char *name, struct bond_params *params, struct bonding **newbond) +{ + struct net_device *bond_dev; + int res; + + rtnl_lock(); + bond_dev = alloc_netdev(sizeof(struct bonding), name, ether_setup); + if (!bond_dev) { + printk(KERN_ERR DRV_NAME + ": %s: eek! can't alloc netdev!\n", + name); + res = -ENOMEM; + goto out_rtnl; + } + + /* 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, params); + if (res < 0) { + goto out_netdev; + } + + SET_MODULE_OWNER(bond_dev); + + res = register_netdevice(bond_dev); + if (res < 0) { + goto out_bond; + } + if (newbond) + *newbond = bond_dev->priv; + + rtnl_unlock(); /* allows sysfs registration of net device */ + res = bond_create_sysfs_entry(bond_dev->priv); + goto done; +out_bond: + bond_deinit(bond_dev); +out_netdev: + free_netdev(bond_dev); +out_rtnl: + rtnl_unlock(); +done: + return res; +} + static int __init bonding_init(void) { - struct bond_params params; int i; int res; + char new_bond_name[8]; /* Enough room for 999 bonds at init. */ printk(KERN_INFO "%s", version); - res = bond_check_params(¶ms); + res = bond_check_params(&bonding_defaults); if (res) { - return res; + goto out; } - 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; - } + sprintf(new_bond_name, "bond%d",i); + res = bond_create(new_bond_name,&bonding_defaults, NULL); + if (res) + goto err; } - rtnl_unlock(); + res = bond_create_sysfs(); + if (res) + goto err; + register_netdevice_notifier(&bond_netdev_notifier); register_inetaddr_notifier(&bond_inetaddr_notifier); - return 0; - -out_err: - /* - * rtnl_unlock() will run netdev_run_todo(), putting the - * thus-far-registered bonding devices into a state which - * unregigister_netdevice() will accept - */ - rtnl_unlock(); + goto out; +err: rtnl_lock(); - - /* free and unregister all bonds that were successfully added */ bond_free_all(); - + bond_destroy_sysfs(); rtnl_unlock(); - +out: return res; + } static void __exit bonding_exit(void) @@ -4965,6 +4577,7 @@ static void __exit bonding_exit(void) rtnl_lock(); bond_free_all(); + bond_destroy_sysfs(); rtnl_unlock(); } |