This patch enables support for multiple files in the project. It moves
bonding.c to a sub directory of it's own (drivers/net/bonding/) and
renames it to bond_main.c.
This patch is against bonding 2.4.20-20030317.
diff -Nuarp linux-2.4.20-bonding-20030317/drivers/net/bonding/bond_main.c
linux-2.4.20-bonding-20030317-devel/drivers/net/bonding/bond_main.c
--- linux-2.4.20-bonding-20030317/drivers/net/bonding/bond_main.c
1970-01-01 02:00:00.000000000 +0200
+++ linux-2.4.20-bonding-20030317-devel/drivers/net/bonding/bond_main.c
2003-03-18 17:03:29.000000000 +0200
@@ -0,0 +1,3434 @@
+/*
+ * originally based on the dummy device.
+ *
+ * Copyright 1999, Thomas Davis, tadavis@xxxxxxxx
+ * 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@xxxxxxxxxxxxxxxx>
+ * - 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 current_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() while traffic is 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(): netdev_set_master() must not be
+ * called from within the bond lock while traffic is running.
+ *
+ * 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.
+ */
+
+#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 <asm/system.h>
+#include <asm/bitops.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/if_bonding.h>
+#include <linux/smp.h>
+#include <linux/if_ether.h>
+#include <net/arp.h>
+#include <linux/mii.h>
+#include <linux/ethtool.h>
+
+#define DRV_VERSION "2.4.20-20030317"
+#define DRV_RELDATE "March 17, 2003"
+#define DRV_NAME "bonding"
+#define DRV_DESCRIPTION "Ethernet Channel Bonding Driver"
+
+static const char *version =
+DRV_NAME ".c:v" DRV_VERSION " (" DRV_RELDATE ")\n";
+
+/* monitor all links that often (in milliseconds). <=0 disables monitoring */
+#ifndef BOND_LINK_MON_INTERV
+#define BOND_LINK_MON_INTERV 0
+#endif
+
+#ifndef BOND_LINK_ARP_INTERV
+#define BOND_LINK_ARP_INTERV 0
+#endif
+
+#ifndef MAX_ARP_IP_TARGETS
+#define MAX_ARP_IP_TARGETS 16
+#endif
+
+static int arp_interval = BOND_LINK_ARP_INTERV;
+static char *arp_ip_target[MAX_ARP_IP_TARGETS] = { NULL, };
+static unsigned long arp_target[MAX_ARP_IP_TARGETS] = { 0, } ;
+static int arp_ip_count = 0;
+static u32 my_ip = 0;
+char *arp_target_hw_addr = NULL;
+
+static char *primary= NULL;
+
+static int max_bonds = BOND_DEFAULT_MAX_BONDS;
+static int miimon = BOND_LINK_MON_INTERV;
+static int use_carrier = 1;
+static int bond_mode = BOND_MODE_ROUNDROBIN;
+static int updelay = 0;
+static int downdelay = 0;
+
+static char *mode = NULL;
+
+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},
+{ NULL, -1},
+};
+
+static int multicast_mode = BOND_MULTICAST_ALL;
+static char *multicast = NULL;
+
+static struct bond_parm_tbl bond_mc_tbl[] = {
+{ "disabled", BOND_MULTICAST_DISABLED},
+{ "active", BOND_MULTICAST_ACTIVE},
+{ "all", BOND_MULTICAST_ALL},
+{ NULL, -1},
+};
+
+static int first_pass = 1;
+static struct bonding *these_bonds = NULL;
+static struct net_device *dev_bonds = NULL;
+
+MODULE_PARM(max_bonds, "i");
+MODULE_PARM_DESC(max_bonds, "Max number of bonded devices");
+MODULE_PARM(miimon, "i");
+MODULE_PARM_DESC(miimon, "Link check interval in milliseconds");
+MODULE_PARM(use_carrier, "i");
+MODULE_PARM_DESC(use_carrier, "Use netif_carrier_ok (vs MII ioctls) in miimon;
09 for off, 1 for on (default)");
+MODULE_PARM(mode, "s");
+MODULE_PARM_DESC(mode, "Mode of operation : 0 for round robin, 1 for
active-backup, 2 for xor");
+MODULE_PARM(arp_interval, "i");
+MODULE_PARM_DESC(arp_interval, "arp interval in milliseconds");
+MODULE_PARM(arp_ip_target, "1-" __MODULE_STRING(MAX_ARP_IP_TARGETS) "s");
+MODULE_PARM_DESC(arp_ip_target, "arp targets in n.n.n.n form");
+MODULE_PARM(updelay, "i");
+MODULE_PARM_DESC(updelay, "Delay before considering link up, in milliseconds");
+MODULE_PARM(downdelay, "i");
+MODULE_PARM_DESC(downdelay, "Delay before considering link down, in
milliseconds");
+MODULE_PARM(primary, "s");
+MODULE_PARM_DESC(primary, "Primary network device to use");
+MODULE_PARM(multicast, "s");
+MODULE_PARM_DESC(multicast, "Mode for multicast support : 0 for none, 1 for
active slave, 2 for all slaves (default)");
+
+static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *dev);
+static int bond_xmit_xor(struct sk_buff *skb, struct net_device *dev);
+static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *dev);
+static struct net_device_stats *bond_get_stats(struct net_device *dev);
+static void bond_mii_monitor(struct net_device *dev);
+static void loadbalance_arp_monitor(struct net_device *dev);
+static void activebackup_arp_monitor(struct net_device *dev);
+static int bond_event(struct notifier_block *this, unsigned long event, void
*ptr);
+static void bond_mc_list_destroy(struct bonding *bond);
+static void bond_mc_add(bonding_t *bond, void *addr, int alen);
+static void bond_mc_delete(bonding_t *bond, void *addr, int alen);
+static int bond_mc_list_copy (struct dev_mc_list *src, struct bonding *dst,
int gpf_flag);
+static inline int dmi_same(struct dev_mc_list *dmi1, struct dev_mc_list *dmi2);
+static void bond_set_promiscuity(bonding_t *bond, int inc);
+static void bond_set_allmulti(bonding_t *bond, int inc);
+static struct dev_mc_list* bond_mc_list_find_dmi(struct dev_mc_list *dmi,
struct dev_mc_list *mc_list);
+static void bond_mc_update(bonding_t *bond, slave_t *new, slave_t *old);
+static void bond_set_slave_inactive_flags(slave_t *slave);
+static void bond_set_slave_active_flags(slave_t *slave);
+static int bond_enslave(struct net_device *master, struct net_device *slave);
+static int bond_release(struct net_device *master, struct net_device *slave);
+static int bond_release_all(struct net_device *master);
+static int bond_sethwaddr(struct net_device *master, struct net_device *slave);
+
+/*
+ * bond_get_info is the interface into the /proc filesystem. This is
+ * a different interface than the BOND_INFO_QUERY ioctl. That is done
+ * through the generic networking ioctl interface, and bond_info_query
+ * is the internal function which provides that information.
+ */
+static int bond_get_info(char *buf, char **start, off_t offset, int length);
+
+/* #define BONDING_DEBUG 1 */
+
+/* several macros */
+
+#define IS_UP(dev) ((((dev)->flags & (IFF_UP)) == (IFF_UP)) && \
+ (netif_running(dev) && netif_carrier_ok(dev)))
+
+static void arp_send_all(slave_t *slave)
+{
+ int i;
+
+ for (i = 0; (i<MAX_ARP_IP_TARGETS) && arp_target[i]; i++) {
+ arp_send(ARPOP_REQUEST, ETH_P_ARP, arp_target[i], slave->dev,
+ my_ip, arp_target_hw_addr, slave->dev->dev_addr,
+ arp_target_hw_addr);
+ }
+}
+
+
+static const char *
+bond_mode_name(void)
+{
+ switch (bond_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)";
+ default :
+ return "unknown";
+ }
+}
+
+static const char *
+multicast_mode_name(void)
+{
+ switch(multicast_mode) {
+ case BOND_MULTICAST_DISABLED :
+ return "disabled";
+ case BOND_MULTICAST_ACTIVE :
+ return "active slave only";
+ case BOND_MULTICAST_ALL :
+ return "all slaves";
+ default :
+ return "unknown";
+ }
+}
+
+static void bond_set_slave_inactive_flags(slave_t *slave)
+{
+ slave->state = BOND_STATE_BACKUP;
+ slave->dev->flags |= IFF_NOARP;
+}
+
+static void bond_set_slave_active_flags(slave_t *slave)
+{
+ slave->state = BOND_STATE_ACTIVE;
+ slave->dev->flags &= ~IFF_NOARP;
+}
+
+/*
+ * This function counts and verifies the the number of attached
+ * slaves, checking the count against the expected value (given that incr
+ * is either 1 or -1, for add or removal of a slave). Only
+ * bond_xmit_xor() uses the slave_cnt value, but this is still a good
+ * consistency check.
+ */
+static inline void
+update_slave_cnt(bonding_t *bond, int incr)
+{
+ slave_t *slave = NULL;
+ int expect = bond->slave_cnt + incr;
+
+ bond->slave_cnt = 0;
+ for (slave = bond->prev; slave != (slave_t*)bond;
+ slave = slave->prev) {
+ bond->slave_cnt++;
+ }
+
+ if (expect != bond->slave_cnt)
+ BUG();
+}
+
+/*
+ * This function detaches the slave <slave> from the list <bond>.
+ * WARNING: no check is made to verify if the slave effectively
+ * belongs to <bond>. It returns <slave> in case it's needed.
+ * Nothing is freed on return, structures are just unchained.
+ * If the bond->current_slave pointer was pointing to <slave>,
+ * it's replaced with slave->next, or <bond> if not applicable.
+ *
+ * bond->lock held by caller.
+ */
+static slave_t *
+bond_detach_slave(bonding_t *bond, slave_t *slave)
+{
+ if ((bond == NULL) || (slave == NULL) ||
+ ((void *)bond == (void *)slave)) {
+ printk(KERN_ERR
+ "bond_detach_slave(): trying to detach "
+ "slave %p from bond %p\n", bond, slave);
+ return slave;
+ }
+
+ if (bond->next == slave) { /* is the slave at the head ? */
+ if (bond->prev == slave) { /* is the slave alone ? */
+ write_lock(&bond->ptrlock);
+ bond->current_slave = NULL; /* no slave anymore */
+ write_unlock(&bond->ptrlock);
+ bond->prev = bond->next = (slave_t *)bond;
+ } else { /* not alone */
+ bond->next = slave->next;
+ slave->next->prev = (slave_t *)bond;
+ bond->prev->next = slave->next;
+
+ write_lock(&bond->ptrlock);
+ if (bond->current_slave == slave) {
+ bond->current_slave = slave->next;
+ }
+ write_unlock(&bond->ptrlock);
+ }
+ } else {
+ slave->prev->next = slave->next;
+ if (bond->prev == slave) { /* is this slave the last one ? */
+ bond->prev = slave->prev;
+ } else {
+ slave->next->prev = slave->prev;
+ }
+
+ write_lock(&bond->ptrlock);
+ if (bond->current_slave == slave) {
+ bond->current_slave = slave->next;
+ }
+ write_unlock(&bond->ptrlock);
+ }
+
+ update_slave_cnt(bond, -1);
+
+ return slave;
+}
+
+static void
+bond_attach_slave(struct bonding *bond, struct slave *new_slave)
+{
+ /*
+ * queue to the end of the slaves list, make the first element its
+ * successor, the last one its predecessor, and make it the bond's
+ * predecessor.
+ *
+ * Just to clarify, so future bonding driver hackers don't go through
+ * the same confusion stage I did trying to figure this out, the
+ * slaves are stored in a double linked circular list, sortof.
+ * In the ->next direction, the last slave points to the first slave,
+ * bypassing bond; only the slaves are in the ->next direction.
+ * In the ->prev direction, however, the first slave points to bond
+ * and bond points to the last slave.
+ *
+ * It looks like a circle with a little bubble hanging off one side
+ * in the ->prev direction only.
+ *
+ * When going through the list once, its best to start at bond->prev
+ * and go in the ->prev direction, testing for bond. Doing this
+ * in the ->next direction doesn't work. Trust me, I know this now.
+ * :) -mts 2002.03.14
+ */
+ new_slave->prev = bond->prev;
+ new_slave->prev->next = new_slave;
+ bond->prev = new_slave;
+ new_slave->next = bond->next;
+
+ update_slave_cnt(bond, 1);
+}
+
+
+/*
+ * Less bad way to call ioctl from within the kernel; this needs to be
+ * done some other way to get the call out of interrupt context.
+ * Needs "ioctl" variable to be supplied by calling context.
+ */
+#define IOCTL(dev, arg, cmd) ({ \
+ int ret; \
+ mm_segment_t fs = get_fs(); \
+ set_fs(get_ds()); \
+ ret = ioctl(dev, arg, cmd); \
+ set_fs(fs); \
+ ret; })
+
+/*
+ * 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 *dev = slave->dev;
+ static int (* ioctl)(struct net_device *, struct ifreq *, int);
+ struct ifreq ifr;
+ struct ethtool_cmd etool;
+
+ ioctl = dev->do_ioctl;
+ if (ioctl) {
+ etool.cmd = ETHTOOL_GSET;
+ ifr.ifr_data = (char*)&etool;
+ if (IOCTL(dev, &ifr, SIOCETHTOOL) == 0) {
+ slave->speed = etool.speed;
+ slave->duplex = etool.duplex;
+ } else {
+ goto err_out;
+ }
+ } else {
+ goto err_out;
+ }
+
+ switch (slave->speed) {
+ case SPEED_10:
+ case SPEED_100:
+ case SPEED_1000:
+ break;
+ default:
+ goto err_out;
+ }
+
+ switch (slave->duplex) {
+ case DUPLEX_FULL:
+ case DUPLEX_HALF:
+ break;
+ default:
+ goto err_out;
+ }
+
+ return 0;
+
+err_out:
+ //Fake speed and duplex
+ slave->speed = SPEED_100;
+ slave->duplex = DUPLEX_FULL;
+ return -1;
+}
+
+/*
+ * 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 net_device *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 (use_carrier) {
+ return netif_carrier_ok(dev) ? BMSR_LSTATUS : 0;
+ }
+
+ ioctl = 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 */
+ mii = (struct mii_ioctl_data *)&ifr.ifr_data;
+ if (IOCTL(dev, &ifr, SIOCGMIIPHY) == 0) {
+ mii->reg_num = MII_BMSR;
+ if (IOCTL(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... */
+ etool.cmd = ETHTOOL_GLINK;
+ ifr.ifr_data = (char*)&etool;
+ if (IOCTL(dev, &ifr, SIOCETHTOOL) == 0) {
+ if (etool.data == 1) {
+ return BMSR_LSTATUS;
+ } else {
+#ifdef BONDING_DEBUG
+ printk(KERN_INFO
+ ":: SIOCETHTOOL shows link down \n");
+#endif
+ 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;
+}
+
+static u16 bond_check_mii_link(bonding_t *bond)
+{
+ int has_active_interface = 0;
+ unsigned long flags;
+
+ read_lock_irqsave(&bond->lock, flags);
+ read_lock(&bond->ptrlock);
+ has_active_interface = (bond->current_slave != NULL);
+ read_unlock(&bond->ptrlock);
+ read_unlock_irqrestore(&bond->lock, flags);
+
+ return (has_active_interface ? BMSR_LSTATUS : 0);
+}
+
+static int bond_open(struct net_device *dev)
+{
+ struct timer_list *timer = &((struct bonding *)(dev->priv))->mii_timer;
+ struct timer_list *arp_timer = &((struct bonding
*)(dev->priv))->arp_timer;
+ MOD_INC_USE_COUNT;
+
+ if (miimon > 0) { /* link check interval, in milliseconds. */
+ init_timer(timer);
+ timer->expires = jiffies + (miimon * HZ / 1000);
+ timer->data = (unsigned long)dev;
+ timer->function = (void *)&bond_mii_monitor;
+ add_timer(timer);
+ }
+
+ if (arp_interval> 0) { /* arp interval, in milliseconds. */
+ init_timer(arp_timer);
+ arp_timer->expires = jiffies + (arp_interval * HZ / 1000);
+ arp_timer->data = (unsigned long)dev;
+ if (bond_mode == BOND_MODE_ACTIVEBACKUP) {
+ arp_timer->function = (void *)&activebackup_arp_monitor;
+ } else {
+ arp_timer->function = (void *)&loadbalance_arp_monitor;
+ }
+ add_timer(arp_timer);
+ }
+ return 0;
+}
+
+static int bond_close(struct net_device *master)
+{
+ bonding_t *bond = (struct bonding *) master->priv;
+ unsigned long flags;
+
+ write_lock_irqsave(&bond->lock, flags);
+
+ if (miimon > 0) { /* link check interval, in milliseconds. */
+ del_timer(&bond->mii_timer);
+ }
+ if (arp_interval> 0) { /* arp interval, in milliseconds. */
+ del_timer(&bond->arp_timer);
+ if (arp_target_hw_addr != NULL) {
+ kfree(arp_target_hw_addr);
+ arp_target_hw_addr = NULL;
+ }
+ }
+
+ /* Release the bonded slaves */
+ bond_release_all(master);
+ bond_mc_list_destroy (bond);
+
+ write_unlock_irqrestore(&bond->lock, flags);
+
+ MOD_DEC_USE_COUNT;
+ return 0;
+}
+
+/*
+ * flush all members of flush->mc_list from device dev->mc_list
+ */
+static void bond_mc_list_flush(struct net_device *dev, struct net_device
*flush)
+{
+ struct dev_mc_list *dmi;
+
+ for (dmi = flush->mc_list; dmi != NULL; dmi = dmi->next)
+ dev_mc_delete(dev, dmi->dmi_addr, dmi->dmi_addrlen, 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;
+ }
+}
+
+/*
+ * Add a Multicast address to every slave in the bonding group
+ */
+static void bond_mc_add(bonding_t *bond, void *addr, int alen)
+{
+ slave_t *slave;
+ switch (multicast_mode) {
+ case BOND_MULTICAST_ACTIVE :
+ /* write lock already acquired */
+ if (bond->current_slave != NULL)
+ dev_mc_add(bond->current_slave->dev, addr, alen, 0);
+ break;
+ case BOND_MULTICAST_ALL :
+ for (slave = bond->prev; slave != (slave_t*)bond; slave =
slave->prev)
+ dev_mc_add(slave->dev, addr, alen, 0);
+ break;
+ case BOND_MULTICAST_DISABLED :
+ break;
+ }
+}
+
+/*
+ * Remove a multicast address from every slave in the bonding group
+ */
+static void bond_mc_delete(bonding_t *bond, void *addr, int alen)
+{
+ slave_t *slave;
+ switch (multicast_mode) {
+ case BOND_MULTICAST_ACTIVE :
+ /* write lock already acquired */
+ if (bond->current_slave != NULL)
+ dev_mc_delete(bond->current_slave->dev, addr, alen, 0);
+ break;
+ case BOND_MULTICAST_ALL :
+ for (slave = bond->prev; slave != (slave_t*)bond; slave =
slave->prev)
+ dev_mc_delete(slave->dev, addr, alen, 0);
+ break;
+ case BOND_MULTICAST_DISABLED :
+ break;
+ }
+}
+
+/*
+ * Copy all the Multicast addresses from src to the bonding device dst
+ */
+static int bond_mc_list_copy (struct dev_mc_list *src, struct bonding *dst,
+ int gpf_flag)
+{
+ struct dev_mc_list *dmi, *new_dmi;
+
+ for (dmi = src; dmi != NULL; dmi = dmi->next) {
+ new_dmi = kmalloc(sizeof(struct dev_mc_list), gpf_flag);
+
+ if (new_dmi == NULL) {
+ return -ENOMEM;
+ }
+
+ new_dmi->next = dst->mc_list;
+ dst->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;
+}
+
+/*
+ * Returns 0 if dmi1 and dmi2 are the same, non-0 otherwise
+ */
+static inline int 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;
+}
+
+/*
+ * Push the promiscuity flag down to all slaves
+ */
+static void bond_set_promiscuity(bonding_t *bond, int inc)
+{
+ slave_t *slave;
+ switch (multicast_mode) {
+ case BOND_MULTICAST_ACTIVE :
+ /* write lock already acquired */
+ if (bond->current_slave != NULL)
+ dev_set_promiscuity(bond->current_slave->dev, inc);
+ break;
+ case BOND_MULTICAST_ALL :
+ for (slave = bond->prev; slave != (slave_t*)bond; slave =
slave->prev)
+ dev_set_promiscuity(slave->dev, inc);
+ break;
+ case BOND_MULTICAST_DISABLED :
+ break;
+ }
+}
+
+/*
+ * Push the allmulti flag down to all slaves
+ */
+static void bond_set_allmulti(bonding_t *bond, int inc)
+{
+ slave_t *slave;
+ switch (multicast_mode) {
+ case BOND_MULTICAST_ACTIVE :
+ /* write lock already acquired */
+ if (bond->current_slave != NULL)
+ dev_set_allmulti(bond->current_slave->dev, inc);
+ break;
+ case BOND_MULTICAST_ALL :
+ for (slave = bond->prev; slave != (slave_t*)bond; slave =
slave->prev)
+ dev_set_allmulti(slave->dev, inc);
+ break;
+ case BOND_MULTICAST_DISABLED :
+ break;
+ }
+}
+
+/*
+ * 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 != NULL; idmi = idmi->next) {
+ if (dmi_same(dmi, idmi)) {
+ return idmi;
+ }
+ }
+ return NULL;
+}
+
+static void set_multicast_list(struct net_device *master)
+{
+ bonding_t *bond = master->priv;
+ struct dev_mc_list *dmi;
+ unsigned long flags = 0;
+
+ if (multicast_mode == BOND_MULTICAST_DISABLED)
+ return;
+ /*
+ * Lock the private data for the master
+ */
+ write_lock_irqsave(&bond->lock, flags);
+
+ /* set promiscuity flag to slaves */
+ if ( (master->flags & IFF_PROMISC) && !(bond->flags & IFF_PROMISC) )
+ bond_set_promiscuity(bond, 1);
+
+ if ( !(master->flags & IFF_PROMISC) && (bond->flags & IFF_PROMISC) )
+ bond_set_promiscuity(bond, -1);
+
+ /* set allmulti flag to slaves */
+ if ( (master->flags & IFF_ALLMULTI) && !(bond->flags & IFF_ALLMULTI) )
+ bond_set_allmulti(bond, 1);
+
+ if ( !(master->flags & IFF_ALLMULTI) && (bond->flags & IFF_ALLMULTI) )
+ bond_set_allmulti(bond, -1);
+
+ bond->flags = master->flags;
+
+ /* looking for addresses to add to slaves' mc list */
+ for (dmi = master->mc_list; dmi != NULL; dmi = dmi->next) {
+ if (bond_mc_list_find_dmi(dmi, bond->mc_list) == NULL)
+ bond_mc_add(bond, dmi->dmi_addr, dmi->dmi_addrlen);
+ }
+
+ /* looking for addresses to delete from slaves' list */
+ for (dmi = bond->mc_list; dmi != NULL; dmi = dmi->next) {
+ if (bond_mc_list_find_dmi(dmi, master->mc_list) == NULL)
+ bond_mc_delete(bond, dmi->dmi_addr, dmi->dmi_addrlen);
+ }
+
+
+ /* save master's multicast list */
+ bond_mc_list_destroy (bond);
+ bond_mc_list_copy (master->mc_list, bond, GFP_ATOMIC);
+
+ write_unlock_irqrestore(&bond->lock, flags);
+}
+
+/*
+ * Update the mc list and multicast-related flags for the new and
+ * old active slaves (if any) according to the multicast mode
+ */
+static void bond_mc_update(bonding_t *bond, slave_t *new, slave_t *old)
+{
+ struct dev_mc_list *dmi;
+
+ switch(multicast_mode) {
+ case BOND_MULTICAST_ACTIVE :
+ if (bond->device->flags & IFF_PROMISC) {
+ if (old != NULL && new != old)
+ dev_set_promiscuity(old->dev, -1);
+ dev_set_promiscuity(new->dev, 1);
+ }
+ if (bond->device->flags & IFF_ALLMULTI) {
+ if (old != NULL && new != old)
+ dev_set_allmulti(old->dev, -1);
+ dev_set_allmulti(new->dev, 1);
+ }
+ /* first remove all mc addresses from old slave if any,
+ and _then_ add them to new active slave */
+ if (old != NULL && new != old) {
+ for (dmi = bond->device->mc_list; dmi != NULL; dmi =
dmi->next)
+ dev_mc_delete(old->dev, dmi->dmi_addr,
dmi->dmi_addrlen, 0);
+ }
+ for (dmi = bond->device->mc_list; dmi != NULL; dmi = dmi->next)
+ dev_mc_add(new->dev, dmi->dmi_addr, dmi->dmi_addrlen,
0);
+ break;
+ case BOND_MULTICAST_ALL :
+ /* nothing to do: mc list is already up-to-date on all slaves */
+ break;
+ case BOND_MULTICAST_DISABLED :
+ break;
+ }
+}
+
+/* enslave device <slave> to bond device <master> */
+static int bond_enslave(struct net_device *master_dev,
+ struct net_device *slave_dev)
+{
+ bonding_t *bond = NULL;
+ slave_t *new_slave = NULL;
+ unsigned long flags = 0;
+ unsigned long rflags = 0;
+ int err = 0;
+ struct dev_mc_list *dmi;
+ struct in_ifaddr **ifap;
+ struct in_ifaddr *ifa;
+ int link_reporting;
+ struct sockaddr addr;
+
+ if (master_dev == NULL || slave_dev == NULL) {
+ return -ENODEV;
+ }
+ bond = (struct bonding *) master_dev->priv;
+
+ if (slave_dev->do_ioctl == NULL) {
+ printk(KERN_DEBUG
+ "Warning : no link monitoring support for %s\n",
+ slave_dev->name);
+ }
+
+ /* This breaks backward comaptibility with old versions
+ of ifenslave which open the slave before enalsving */
+ /* already up. */
+ if ((slave_dev->flags & IFF_UP) == IFF_UP) {
+#ifdef BONDING_DEBUG
+ printk(KERN_CRIT "Error, slave_dev is up\n");
+#endif
+ return -EBUSY;
+ }
+
+ /* already enslaved */
+ if (master_dev->flags & IFF_SLAVE || slave_dev->flags & IFF_SLAVE) {
+#ifdef BONDING_DEBUG
+ printk(KERN_CRIT "Error, Device was already enslaved\n");
+#endif
+ return -EBUSY;
+ }
+
+ /* bond must be initialize by bond_open() before enslaving */
+ if ((master_dev->flags & IFF_UP) != IFF_UP) {
+#ifdef BONDING_DEBUG
+ printk(KERN_CRIT "Error, master_dev is not up\n");
+#endif
+ return -EPERM;
+ }
+
+ if (slave_dev->set_mac_address == NULL) {
+ printk(KERN_CRIT " The slave device you specified does not
support"
+ " setting the MAC address.\n Your kernel
likely does not"
+ " support slave devices.\n");
+ return -EOPNOTSUPP;
+ }
+
+ if ((new_slave = kmalloc(sizeof(slave_t), GFP_ATOMIC)) == NULL) {
+ return -ENOMEM;
+ }
+ memset(new_slave, 0, sizeof(slave_t));
+
+ /* save slave's original flags before calling */
+ /* netdev_set_master and dev_open */
+ new_slave->original_flags = slave_dev->flags;
+
+ /* save slave's original ("permanent") mac address for
+ modes that 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);
+
+ if (bond->next != (slave_t*)bond) {
+ /* 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, master_dev->dev_addr, ETH_ALEN);
+ addr.sa_family = slave_dev->type;
+ err = slave_dev->set_mac_address(slave_dev, &addr);
+ if (err) {
+#ifdef BONDING_DEBUG
+ printk(KERN_CRIT "Error %d calling set_mac_address\n",
err);
+#endif
+ goto err_free;
+ }
+ }
+
+ /* open the slave since the application closed it */
+ err = dev_open(slave_dev);
+ if (err) {
+#ifdef BONDING_DEBUG
+ printk(KERN_CRIT "Openning slave %s failed\n", slave_dev->name);
+#endif
+ goto err_restore_mac;
+ }
+
+ err = netdev_set_master(slave_dev, master_dev);
+
+ if (err) {
+#ifdef BONDING_DEBUG
+ printk(KERN_CRIT "Error %d calling netdev_set_master\n", err);
+#endif
+ goto err_close;
+ }
+
+ new_slave->dev = slave_dev;
+
+ if (multicast_mode == BOND_MULTICAST_ALL) {
+ /* set promiscuity level to new slave */
+ if (master_dev->flags & IFF_PROMISC)
+ dev_set_promiscuity(slave_dev, 1);
+
+ /* set allmulti level to new slave */
+ if (master_dev->flags & IFF_ALLMULTI)
+ dev_set_allmulti(slave_dev, 1);
+
+ /* upload master's mc_list to new slave */
+ for (dmi = master_dev->mc_list; dmi != NULL; dmi = dmi->next)
+ dev_mc_add (slave_dev, dmi->dmi_addr, dmi->dmi_addrlen,
0);
+ }
+
+ write_lock_irqsave(&bond->lock, flags);
+
+ bond_attach_slave(bond, new_slave);
+ new_slave->delay = 0;
+ new_slave->link_failure_count = 0;
+
+ if (miimon > 0 && !use_carrier) {
+ link_reporting = bond_check_dev_link(slave_dev, 1);
+
+ if ((link_reporting == -1) && (arp_interval == 0)) {
+ /*
+ * 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_ERR
+ "bond_enslave(): 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
+ "bond_enslave: 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 ((miimon <= 0) ||
+ (bond_check_dev_link(slave_dev, 0) == BMSR_LSTATUS)) {
+#ifdef BONDING_DEBUG
+ printk(KERN_CRIT "Initial state of slave_dev is
BOND_LINK_UP\n");
+#endif
+ new_slave->link = BOND_LINK_UP;
+ new_slave->jiffies = jiffies;
+ }
+ else {
+#ifdef BONDING_DEBUG
+ printk(KERN_CRIT "Initial state of slave_dev is
BOND_LINK_DOWN\n");
+#endif
+ new_slave->link = BOND_LINK_DOWN;
+ }
+
+ if (bond_update_speed_duplex(new_slave) && (new_slave->link ==
BOND_LINK_UP) ) {
+ printk(KERN_WARNING
+ "bond_enslave(): failed to get speed/duplex from %s, "
+ "speed forced to 100Mbps, duplex forced to Full.\n",
+ new_slave->dev->name);
+ }
+
+ /* 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 current_slave always point to the last
+ * usable interface, we just have to verify this interface's flag.
+ */
+ if (bond_mode == BOND_MODE_ACTIVEBACKUP) {
+ if (((bond->current_slave == NULL)
+ || (bond->current_slave->dev->flags & IFF_NOARP))
+ && (new_slave->link == BOND_LINK_UP)) {
+#ifdef BONDING_DEBUG
+ printk(KERN_CRIT "This is the first active slave\n");
+#endif
+ /* first slave or no active slave yet, and this link
+ is OK, so make this interface the active one */
+ bond->current_slave = new_slave;
+ bond_set_slave_active_flags(new_slave);
+ bond_mc_update(bond, new_slave, NULL);
+ }
+ else {
+#ifdef BONDING_DEBUG
+ printk(KERN_CRIT "This is just a backup slave\n");
+#endif
+ bond_set_slave_inactive_flags(new_slave);
+ }
+ read_lock_irqsave(&(((struct in_device
*)slave_dev->ip_ptr)->lock), rflags);
+ ifap= &(((struct in_device *)slave_dev->ip_ptr)->ifa_list);
+ ifa = *ifap;
+ my_ip = ifa->ifa_address;
+ read_unlock_irqrestore(&(((struct in_device
*)slave_dev->ip_ptr)->lock), rflags);
+
+ /* if there is a primary slave, remember it */
+ if (primary != NULL)
+ if( strcmp(primary, new_slave->dev->name) == 0)
+ bond->primary_slave = new_slave;
+ } else {
+#ifdef BONDING_DEBUG
+ printk(KERN_CRIT "This slave is always active in trunk mode\n");
+#endif
+ /* always active in trunk mode */
+ new_slave->state = BOND_STATE_ACTIVE;
+ if (bond->current_slave == NULL)
+ bond->current_slave = new_slave;
+ }
+
+ write_unlock_irqrestore(&bond->lock, flags);
+
+ printk (KERN_INFO "%s: enslaving %s as a%s interface with a%s link.\n",
+ master_dev->name, slave_dev->name,
+ new_slave->state == BOND_STATE_ACTIVE ? "n active" : " backup",
+ new_slave->link == BOND_LINK_UP ? "n up" : " down");
+
+ //enslave is successfull
+ return 0;
+
+// Undo stages on error
+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;
+ slave_dev->set_mac_address(slave_dev, &addr);
+
+err_free:
+ kfree(new_slave);
+ return err;
+}
+
+/*
+ * 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_change_active(struct net_device *master_dev, struct net_device
*slave_dev)
+{
+ bonding_t *bond;
+ slave_t *slave;
+ slave_t *oldactive = NULL;
+ slave_t *newactive = NULL;
+ unsigned long flags;
+ int ret = 0;
+
+ if (master_dev == NULL || slave_dev == NULL) {
+ return -ENODEV;
+ }
+
+ bond = (struct bonding *) master_dev->priv;
+ write_lock_irqsave(&bond->lock, flags);
+ slave = (slave_t *)bond;
+ oldactive = bond->current_slave;
+
+ while ((slave = slave->prev) != (slave_t *)bond) {
+ if(slave_dev == slave->dev) {
+ newactive = slave;
+ break;
+ }
+ }
+
+ if ((newactive != NULL)&&
+ (oldactive != NULL)&&
+ (newactive != oldactive)&&
+ (newactive->link == BOND_LINK_UP)&&
+ IS_UP(newactive->dev)) {
+ bond_set_slave_inactive_flags(oldactive);
+ bond_set_slave_active_flags(newactive);
+ bond_mc_update(bond, newactive, oldactive);
+ bond->current_slave = newactive;
+ printk("%s : activate %s(old : %s)\n",
+ master_dev->name, newactive->dev->name,
+ oldactive->dev->name);
+ }
+ else {
+ ret = -EINVAL;
+ }
+ write_unlock_irqrestore(&bond->lock, flags);
+ return ret;
+}
+
+/* Choose a new valid interface from the pool, set it active
+ * and make it the current slave. If no valid interface is
+ * found, the oldest slave in BACK state is choosen and
+ * activated. If none is found, it's considered as no
+ * interfaces left so the current slave is set to NULL.
+ * The result is a pointer to the current slave.
+ *
+ * Since this function sends messages tails through printk, the caller
+ * must have started something like `printk(KERN_INFO "xxxx ");'.
+ *
+ * Warning: must put locks around the call to this function if needed.
+ */
+slave_t *change_active_interface(bonding_t *bond)
+{
+ slave_t *newslave, *oldslave;
+ slave_t *bestslave = NULL;
+ int mintime;
+
+ read_lock(&bond->ptrlock);
+ newslave = oldslave = bond->current_slave;
+ read_unlock(&bond->ptrlock);
+
+ if (newslave == NULL) { /* there were no active slaves left */
+ if (bond->next != (slave_t *)bond) { /* found one slave */
+ write_lock(&bond->ptrlock);
+ newslave = bond->current_slave = bond->next;
+ write_unlock(&bond->ptrlock);
+ } else {
+
+ printk (" but could not find any %s interface.\n",
+ (bond_mode == BOND_MODE_ACTIVEBACKUP) ?
"backup":"other");
+ write_lock(&bond->ptrlock);
+ bond->current_slave = (slave_t *)NULL;
+ write_unlock(&bond->ptrlock);
+ return NULL; /* still no slave, return NULL */
+ }
+ } else if (bond_mode == BOND_MODE_ACTIVEBACKUP) {
+ /* make sure oldslave doesn't send arps - this could
+ * cause a ping-pong effect between interfaces since they
+ * would be able to tx arps - in active backup only one
+ * slave should be able to tx arps, and that should be
+ * the current_slave; the only exception is when all
+ * slaves have gone down, then only one non-current slave can
+ * send arps at a time; clearing oldslaves' mc list is handled
+ * later in this function.
+ */
+ bond_set_slave_inactive_flags(oldslave);
+ }
+
+ mintime = updelay;
+
+ /* first try the primary link; if arping, a link must tx/rx traffic
+ * before it can be considered the current_slave - also, we would skip
+ * slaves between the current_slave and primary_slave that may be up
+ * and able to arp
+ */
+ if ((bond->primary_slave != NULL) && (arp_interval == 0)) {
+ if (IS_UP(bond->primary_slave->dev))
+ newslave = bond->primary_slave;
+ }
+
+ do {
+ if (IS_UP(newslave->dev)) {
+ if (newslave->link == BOND_LINK_UP) {
+ /* this one is immediately usable */
+ if (bond_mode == BOND_MODE_ACTIVEBACKUP) {
+ bond_set_slave_active_flags(newslave);
+ bond_mc_update(bond, newslave,
oldslave);
+ printk (" and making interface %s the
active one.\n",
+ newslave->dev->name);
+ }
+ else {
+ printk (" and setting pointer to
interface %s.\n",
+ newslave->dev->name);
+ }
+
+ write_lock(&bond->ptrlock);
+ bond->current_slave = newslave;
+ write_unlock(&bond->ptrlock);
+ return newslave;
+ }
+ else if (newslave->link == BOND_LINK_BACK) {
+ /* link up, but waiting for stabilization */
+ if (newslave->delay < mintime) {
+ mintime = newslave->delay;
+ bestslave = newslave;
+ }
+ }
+ }
+ } while ((newslave = newslave->next) != oldslave);
+
+ /* no usable backup found, we'll see if we at least got a link that was
+ coming back for a long time, and could possibly already be usable.
+ */
+
+ if (bestslave != NULL) {
+ /* early take-over. */
+ printk (" and making interface %s the active one %d ms
earlier.\n",
+ bestslave->dev->name,
+ (updelay - bestslave->delay)*miimon);
+
+ bestslave->delay = 0;
+ bestslave->link = BOND_LINK_UP;
+ bestslave->jiffies = jiffies;
+ bond_set_slave_active_flags(bestslave);
+ bond_mc_update(bond, bestslave, oldslave);
+ write_lock(&bond->ptrlock);
+ bond->current_slave = bestslave;
+ write_unlock(&bond->ptrlock);
+ return bestslave;
+ }
+
+ if ((bond_mode == BOND_MODE_ACTIVEBACKUP) &&
+ (multicast_mode == BOND_MULTICAST_ACTIVE) &&
+ (oldslave != NULL)) {
+ /* flush bonds (master's) mc_list from oldslave since it wasn't
+ * updated (and deleted) above
+ */
+ bond_mc_list_flush(oldslave->dev, bond->device);
+ if (bond->device->flags & IFF_PROMISC) {
+ dev_set_promiscuity(oldslave->dev, -1);
+ }
+ if (bond->device->flags & IFF_ALLMULTI) {
+ dev_set_allmulti(oldslave->dev, -1);
+ }
+ }
+
+ printk (" but could not find any %s interface.\n",
+ (bond_mode == BOND_MODE_ACTIVEBACKUP) ? "backup":"other");
+
+ /* absolutely nothing found. let's return NULL */
+ write_lock(&bond->ptrlock);
+ bond->current_slave = (slave_t *)NULL;
+ write_unlock(&bond->ptrlock);
+ return NULL;
+}
+
+/*
+ * Try to release the slave device <slave> from the bond device <master>
+ * It is legal to access current_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 *master, struct net_device *slave)
+{
+ bonding_t *bond;
+ slave_t *our_slave, *old_current;
+ unsigned long flags;
+ struct sockaddr addr;
+
+ if (master == NULL || slave == NULL) {
+ return -ENODEV;
+ }
+
+ bond = (struct bonding *) master->priv;
+
+ /* master already enslaved, or slave not enslaved,
+ or no slave for this master */
+ if ((master->flags & IFF_SLAVE) || !(slave->flags & IFF_SLAVE)) {
+ printk (KERN_DEBUG "%s: cannot release %s.\n", master->name,
slave->name);
+ return -EINVAL;
+ }
+
+ write_lock_irqsave(&bond->lock, flags);
+ bond->current_arp_slave = NULL;
+ our_slave = (slave_t *)bond;
+ old_current = bond->current_slave;
+ while ((our_slave = our_slave->prev) != (slave_t *)bond) {
+ if (our_slave->dev == slave) {
+ bond_detach_slave(bond, our_slave);
+
+ printk (KERN_INFO "%s: releasing %s interface %s",
+ master->name,
+ (our_slave->state == BOND_STATE_ACTIVE) ?
"active" : "backup",
+ slave->name);
+
+ if (our_slave == old_current) {
+ /* find a new interface and be verbose */
+ change_active_interface(bond);
+ } else {
+ printk(".\n");
+ }
+
+ if (bond->current_slave == NULL) {
+ printk(KERN_INFO
+ "%s: now running without any active
interface !\n",
+ master->name);
+ }
+
+ if (bond->primary_slave == our_slave) {
+ bond->primary_slave = NULL;
+ }
+
+ break;
+ }
+
+ }
+ write_unlock_irqrestore(&bond->lock, flags);
+
+ if (our_slave == (slave_t *)bond) {
+ /* if we get here, it's because the device was not found */
+ printk (KERN_INFO "%s: %s not enslaved\n", master->name,
slave->name);
+ return -EINVAL;
+ }
+
+ /* undo settings and restore original values */
+
+ if (multicast_mode == BOND_MULTICAST_ALL) {
+ /* flush master's mc_list from slave */
+ bond_mc_list_flush (slave, master);
+
+ /* unset promiscuity level from slave */
+ if (master->flags & IFF_PROMISC)
+ dev_set_promiscuity(slave, -1);
+
+ /* unset allmulti level from slave */
+ if (master->flags & IFF_ALLMULTI)
+ dev_set_allmulti(slave, -1);
+ }
+
+ netdev_set_master(slave, NULL);
+
+ /* close slave before restoring its mac address */
+ dev_close(slave);
+
+ /* restore original ("permanent") mac address*/
+ memcpy(addr.sa_data, our_slave->perm_hwaddr, ETH_ALEN);
+ addr.sa_family = slave->type;
+ slave->set_mac_address(slave, &addr);
+
+ /* restore the original state of the IFF_NOARP flag that might have */
+ /* been set by bond_set_slave_inactive_flags() */
+ if ((our_slave->original_flags & IFF_NOARP) == 0) {
+ slave->flags &= ~IFF_NOARP;
+ }
+
+ kfree(our_slave);
+
+ /* 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 */
+ if (bond->next == (slave_t*)bond) {
+ memset(master->dev_addr, 0, master->addr_len);
+ }
+
+ return 0; /* deletion OK */
+}
+
+/*
+ * This function releases all slaves.
+ * Warning: must put write-locks around the call to this function.
+ */
+static int bond_release_all(struct net_device *master)
+{
+ bonding_t *bond;
+ slave_t *our_slave;
+ struct net_device *slave_dev;
+ struct sockaddr addr;
+
+ if (master == NULL) {
+ return -ENODEV;
+ }
+
+ if (master->flags & IFF_SLAVE) {
+ return -EINVAL;
+ }
+
+ bond = (struct bonding *) master->priv;
+ bond->current_arp_slave = NULL;
+ bond->current_slave = NULL;
+ bond->primary_slave = NULL;
+
+ while ((our_slave = bond->prev) != (slave_t *)bond) {
+ slave_dev = our_slave->dev;
+ bond_detach_slave(bond, our_slave);
+
+ if (multicast_mode == BOND_MULTICAST_ALL
+ || (multicast_mode == BOND_MULTICAST_ACTIVE
+ && bond->current_slave == our_slave)) {
+
+ /* flush master's mc_list from slave */
+ bond_mc_list_flush (slave_dev, master);
+
+ /* unset promiscuity level from slave */
+ if (master->flags & IFF_PROMISC)
+ dev_set_promiscuity(slave_dev, -1);
+
+ /* unset allmulti level from slave */
+ if (master->flags & IFF_ALLMULTI)
+ dev_set_allmulti(slave_dev, -1);
+ }
+
+ /* Can be safely called from inside the bond lock
+ since traffic and timers have already stopped
+ */
+ netdev_set_master(slave_dev, NULL);
+
+ /* close slave before restoring its mac address */
+ dev_close(slave_dev);
+
+ /* restore original ("permanent") mac address*/
+ memcpy(addr.sa_data, our_slave->perm_hwaddr, ETH_ALEN);
+ addr.sa_family = slave_dev->type;
+ slave_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 ((our_slave->original_flags & IFF_NOARP) == 0) {
+ slave_dev->flags &= ~IFF_NOARP;
+ }
+
+ kfree(our_slave);
+ }
+
+ /* zero the mac address of the master so it will be
+ set by the application to the mac address of the
+ first slave */
+ memset(master->dev_addr, 0, master->addr_len);
+
+ printk (KERN_INFO "%s: released all slaves\n", master->name);
+
+ return 0;
+}
+
+/* this function is called regularly to monitor each slave's link. */
+static void bond_mii_monitor(struct net_device *master)
+{
+ bonding_t *bond = (struct bonding *) master->priv;
+ slave_t *slave, *bestslave, *oldcurrent;
+ unsigned long flags;
+ int slave_died = 0;
+
+ read_lock_irqsave(&bond->lock, flags);
+
+ /* 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.
+ */
+
+ bestslave = NULL;
+ slave = (slave_t *)bond;
+
+ read_lock(&bond->ptrlock);
+ oldcurrent = bond->current_slave;
+ read_unlock(&bond->ptrlock);
+
+ while ((slave = slave->prev) != (slave_t *)bond) {
+ /* use updelay+1 to match an UP slave even when updelay is 0 */
+ int mindelay = updelay + 1;
+ struct net_device *dev = slave->dev;
+ int link_state;
+
+ link_state = bond_check_dev_link(dev, 0);
+
+ switch (slave->link) {
+ case BOND_LINK_UP: /* the link was up */
+ if (link_state == BMSR_LSTATUS) {
+ /* link stays up, tell that this one
+ is immediately available */
+ if (IS_UP(dev) && (mindelay > -2)) {
+ /* -2 is the best case :
+ this slave was already up */
+ mindelay = -2;
+ bestslave = slave;
+ }
+ break;
+ }
+ else { /* link going down */
+ slave->link = BOND_LINK_FAIL;
+ slave->delay = downdelay;
+ if (slave->link_failure_count < UINT_MAX) {
+ slave->link_failure_count++;
+ }
+ if (downdelay > 0) {
+ printk (KERN_INFO
+ "%s: link status down for
%sinterface "
+ "%s, disabling it in %d ms.\n",
+ master->name,
+ IS_UP(dev)
+ ? ((bond_mode ==
BOND_MODE_ACTIVEBACKUP)
+ ? ((slave == oldcurrent)
+ ? "active " : "backup ")
+ : "")
+ : "idle ",
+ dev->name,
+ downdelay * 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_mode ==
BOND_MODE_ACTIVEBACKUP) {
+
bond_set_slave_inactive_flags(slave);
+ }
+ printk(KERN_INFO
+ "%s: link status definitely
down "
+ "for interface %s, disabling
it",
+ master->name,
+ dev->name);
+
+ read_lock(&bond->ptrlock);
+ if (slave == bond->current_slave) {
+ read_unlock(&bond->ptrlock);
+ /* find a new interface and be
verbose */
+ change_active_interface(bond);
+ } else {
+ read_unlock(&bond->ptrlock);
+ printk(".\n");
+ }
+ slave_died = 1;
+ } else {
+ slave->delay--;
+ }
+ } else {
+ /* link up again */
+ slave->link = BOND_LINK_UP;
+ slave->jiffies = jiffies;
+ printk(KERN_INFO
+ "%s: link status up again after %d ms "
+ "for interface %s.\n",
+ master->name,
+ (downdelay - slave->delay) * miimon,
+ dev->name);
+
+ if (IS_UP(dev) && (mindelay > -1)) {
+ /* -1 is a good case : this slave went
+ down only for a short time */
+ mindelay = -1;
+ bestslave = slave;
+ }
+ }
+ 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 = updelay;
+
+ if (updelay > 0) {
+ /* if updelay == 0, no need to
+ advertise about a 0 ms delay */
+ printk (KERN_INFO
+ "%s: link status up for
interface"
+ " %s, enabling it in %d ms.\n",
+ master->name,
+ dev->name,
+ updelay * 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
+ "%s: link status down again after %d ms
"
+ "for interface %s.\n",
+ master->name,
+ (updelay - slave->delay) * miimon,
+ 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_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
+ "%s: link status definitely up "
+ "for interface %s.\n",
+ master->name,
+ dev->name);
+
+ if ( (bond->primary_slave != NULL)
+ && (slave == bond->primary_slave) )
+ change_active_interface(bond);
+ }
+ else
+ slave->delay--;
+
+ /* we'll also look for the mostly eligible
slave */
+ if (bond->primary_slave == NULL) {
+ if (IS_UP(dev) && (slave->delay <
mindelay)) {
+ mindelay = slave->delay;
+ bestslave = slave;
+ }
+ } else if ( (IS_UP(bond->primary_slave->dev))
||
+ ( (!IS_UP(bond->primary_slave->dev))
&&
+ (IS_UP(dev) && (slave->delay <
mindelay)) ) ) {
+ mindelay = slave->delay;
+ bestslave = slave;
+ }
+ }
+ break;
+ } /* end of switch */
+
+ bond_update_speed_duplex(slave);
+
+ } /* end of while */
+
+ /*
+ * if there's no active interface and we discovered that one
+ * of the slaves could be activated earlier, so we do it.
+ */
+ read_lock(&bond->ptrlock);
+ oldcurrent = bond->current_slave;
+ read_unlock(&bond->ptrlock);
+
+ /* no active interface at the moment or need to bring up the primary */
+ if (oldcurrent == NULL) { /* no active interface at the moment */
+ if (bestslave != NULL) { /* last chance to find one ? */
+ if (bestslave->link == BOND_LINK_UP) {
+ printk (KERN_INFO
+ "%s: making interface %s the new active
one.\n",
+ master->name, bestslave->dev->name);
+ } else {
+ printk (KERN_INFO
+ "%s: making interface %s the new "
+ "active one %d ms earlier.\n",
+ master->name, bestslave->dev->name,
+ (updelay - bestslave->delay) * miimon);
+
+ bestslave->delay = 0;
+ bestslave->link = BOND_LINK_UP;
+ bestslave->jiffies = jiffies;
+ }
+
+ if (bond_mode == BOND_MODE_ACTIVEBACKUP) {
+ bond_set_slave_active_flags(bestslave);
+ bond_mc_update(bond, bestslave, NULL);
+ } else {
+ bestslave->state = BOND_STATE_ACTIVE;
+ }
+ write_lock(&bond->ptrlock);
+ bond->current_slave = bestslave;
+ write_unlock(&bond->ptrlock);
+ } else if (slave_died) {
+ /* print this message only once a slave has just died */
+ printk(KERN_INFO
+ "%s: now running without any active interface
!\n",
+ master->name);
+ }
+ }
+
+ read_unlock_irqrestore(&bond->lock, flags);
+ /* re-arm the timer */
+ mod_timer(&bond->mii_timer, jiffies + (miimon * HZ / 1000));
+}
+
+/*
+ * 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 loadbalance_arp_monitor(struct net_device *master)
+{
+ bonding_t *bond;
+ unsigned long flags;
+ slave_t *slave;
+ int the_delta_in_ticks = arp_interval * HZ / 1000;
+ int next_timer = jiffies + (arp_interval * HZ / 1000);
+
+ bond = (struct bonding *) master->priv;
+ if (master->priv == NULL) {
+ mod_timer(&bond->arp_timer, next_timer);
+ return;
+ }
+
+ read_lock_irqsave(&bond->lock, flags);
+
+ /* TODO: investigate why rtnl_shlock_nowait and rtnl_exlock_nowait
+ * are called below and add comment why they are required...
+ */
+ if ((!IS_UP(master)) || rtnl_shlock_nowait()) {
+ mod_timer(&bond->arp_timer, next_timer);
+ read_unlock_irqrestore(&bond->lock, flags);
+ return;
+ }
+
+ if (rtnl_exlock_nowait()) {
+ rtnl_shunlock();
+ mod_timer(&bond->arp_timer, next_timer);
+ read_unlock_irqrestore(&bond->lock, flags);
+ return;
+ }
+
+ /* see if any of the previous devices are up now (i.e. they have
+ * xmt and rcv traffic). the current_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
+ */
+ slave = (slave_t *)bond;
+ while ((slave = slave->prev) != (slave_t *)bond) {
+
+ if (slave->link != BOND_LINK_UP) {
+
+ if (((jiffies - slave->dev->trans_start) <=
+ the_delta_in_ticks) &&
+ ((jiffies - slave->dev->last_rx) <=
+ the_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
+ * current_slave being null after enslaving
+ * is closed.
+ */
+ read_lock(&bond->ptrlock);
+ if (bond->current_slave == NULL) {
+ read_unlock(&bond->ptrlock);
+ printk(KERN_INFO
+ "%s: link status definitely up "
+ "for interface %s, ",
+ master->name,
+ slave->dev->name);
+ change_active_interface(bond);
+ } else {
+ read_unlock(&bond->ptrlock);
+ printk(KERN_INFO
+ "%s: interface %s is now up\n",
+ master->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*the_delta_in_ticks)) ||
+ (((jiffies - slave->dev->last_rx) >=
+ (2*the_delta_in_ticks)) && my_ip !=0)) {
+ slave->link = BOND_LINK_DOWN;
+ slave->state = BOND_STATE_BACKUP;
+ if (slave->link_failure_count < UINT_MAX) {
+ slave->link_failure_count++;
+ }
+ printk(KERN_INFO
+ "%s: interface %s is now down.\n",
+ master->name,
+ slave->dev->name);
+
+ read_lock(&bond->ptrlock);
+ if (slave == bond->current_slave) {
+ read_unlock(&bond->ptrlock);
+ change_active_interface(bond);
+ } else {
+ read_unlock(&bond->ptrlock);
+ }
+ }
+ }
+
+ /* 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)) {
+ arp_send_all(slave);
+ }
+ }
+
+ rtnl_exunlock();
+ rtnl_shunlock();
+ read_unlock_irqrestore(&bond->lock, flags);
+
+ /* re-arm the timer */
+ mod_timer(&bond->arp_timer, next_timer);
+}
+
+/*
+ * 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 activebackup_arp_monitor(struct net_device *master)
+{
+ bonding_t *bond;
+ unsigned long flags;
+ slave_t *slave;
+ int the_delta_in_ticks = arp_interval * HZ / 1000;
+ int next_timer = jiffies + (arp_interval * HZ / 1000);
+
+ bond = (struct bonding *) master->priv;
+ if (master->priv == NULL) {
+ mod_timer(&bond->arp_timer, next_timer);
+ return;
+ }
+
+ read_lock_irqsave(&bond->lock, flags);
+
+ if (!IS_UP(master)) {
+ mod_timer(&bond->arp_timer, next_timer);
+ read_unlock_irqrestore(&bond->lock, flags);
+ return;
+ }
+
+ /* 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
+ */
+ slave = (slave_t *)bond;
+ while ((slave = slave->prev) != (slave_t *)bond) {
+
+ if (slave->link != BOND_LINK_UP) {
+ if ((jiffies - slave->dev->last_rx) <=
+ the_delta_in_ticks) {
+
+ slave->link = BOND_LINK_UP;
+ write_lock(&bond->ptrlock);
+ if ((bond->current_slave == NULL) &&
+ ((jiffies - slave->dev->trans_start) <=
+ the_delta_in_ticks)) {
+ bond->current_slave = slave;
+ bond_set_slave_active_flags(slave);
+ bond_mc_update(bond, slave, NULL);
+ bond->current_arp_slave = NULL;
+ } else if (bond->current_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->current_slave) {
+ printk(KERN_INFO
+ "%s: %s is up and now the "
+ "active interface\n",
+ master->name,
+ slave->dev->name);
+ } else {
+ printk(KERN_INFO
+ "%s: backup interface %s is "
+ "now up\n",
+ master->name,
+ slave->dev->name);
+ }
+
+ write_unlock(&bond->ptrlock);
+ }
+ } else {
+ read_lock(&bond->ptrlock);
+ if ((slave != bond->current_slave) &&
+ (bond->current_arp_slave == NULL) &&
+ (((jiffies - slave->dev->last_rx) >=
+ 3*the_delta_in_ticks) && (my_ip != 0))) {
+ /* 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 current_slave went down and we are
+ * searching for a new one; under this
+ * condition we only take the current_slave
+ * down - this gives each slave a chance to
+ * tx/rx traffic before being taken out
+ */
+ read_unlock(&bond->ptrlock);
+ 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
+ "%s: backup interface %s is now down\n",
+ master->name,
+ slave->dev->name);
+ } else {
+ read_unlock(&bond->ptrlock);
+ }
+ }
+ }
+
+ read_lock(&bond->ptrlock);
+ slave = bond->current_slave;
+ read_unlock(&bond->ptrlock);
+
+ if (slave != NULL) {
+
+ /* 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 current_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 current_slave
+ */
+ if ((((jiffies - slave->dev->trans_start) >=
+ (2*the_delta_in_ticks)) ||
+ (((jiffies - slave->dev->last_rx) >=
+ (2*the_delta_in_ticks)) && (my_ip != 0))) &&
+ ((jiffies - slave->jiffies) >= 2*the_delta_in_ticks)) {
+
+ slave->link = BOND_LINK_DOWN;
+ if (slave->link_failure_count < UINT_MAX) {
+ slave->link_failure_count++;
+ }
+ printk(KERN_INFO "%s: link status down for "
+ "active interface %s, disabling it",
+ master->name,
+ slave->dev->name);
+ slave = change_active_interface(bond);
+ bond->current_arp_slave = slave;
+ if (slave != NULL) {
+ slave->jiffies = jiffies;
+ }
+
+ } else if ((bond->primary_slave != NULL) &&
+ (bond->primary_slave != slave) &&
+ (bond->primary_slave->link == BOND_LINK_UP)) {
+ /* at this point, slave is the current_slave */
+ printk(KERN_INFO
+ "%s: changing from interface %s to primary "
+ "interface %s\n",
+ master->name,
+ slave->dev->name,
+ bond->primary_slave->dev->name);
+
+ /* primary is up so switch to it */
+ bond_set_slave_inactive_flags(slave);
+ bond_mc_update(bond, bond->primary_slave, slave);
+ write_lock(&bond->ptrlock);
+ bond->current_slave = bond->primary_slave;
+ write_unlock(&bond->ptrlock);
+ slave = bond->primary_slave;
+ bond_set_slave_active_flags(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 != NULL) &&
+ (((jiffies - slave->dev->last_rx) >= the_delta_in_ticks) &&
+ (my_ip != 0))) {
+ arp_send_all(slave);
+ }
+ }
+
+ /* if we don't have a current_slave, search for the next available
+ * backup slave from the current_arp_slave and make it the candidate
+ * for becoming the current_slave
+ */
+ if (slave == NULL) {
+
+ if ((bond->current_arp_slave == NULL) ||
+ (bond->current_arp_slave == (slave_t *)bond)) {
+ bond->current_arp_slave = bond->prev;
+ }
+
+ if (bond->current_arp_slave != (slave_t *)bond) {
+ bond_set_slave_inactive_flags(bond->current_arp_slave);
+ slave = bond->current_arp_slave->next;
+
+ /* search for next candidate */
+ do {
+ if (IS_UP(slave->dev)) {
+ slave->link = BOND_LINK_BACK;
+ bond_set_slave_active_flags(slave);
+ arp_send_all(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
+ * change_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
+ "%s: backup interface "
+ "%s is now down.\n",
+ master->name,
+ slave->dev->name);
+ }
+ } while ((slave = slave->next) !=
+ bond->current_arp_slave->next);
+ }
+ }
+
+ mod_timer(&bond->arp_timer, next_timer);
+ read_unlock_irqrestore(&bond->lock, flags);
+}
+
+typedef uint32_t in_addr_t;
+
+int
+my_inet_aton(char *cp, unsigned long *the_addr) {
+ static const in_addr_t max[4] = { 0xffffffff, 0xffffff, 0xffff, 0xff };
+ in_addr_t val;
+ char c;
+ union iaddr {
+ uint8_t bytes[4];
+ uint32_t word;
+ } res;
+ uint8_t *pp = res.bytes;
+ int digit,base;
+
+ res.word = 0;
+
+ c = *cp;
+ for (;;) {
+ /*
+ * Collect number up to ``.''.
+ * Values are specified as for C:
+ * 0x=hex, 0=octal, isdigit=decimal.
+ */
+ if (!isdigit(c)) goto ret_0;
+ val = 0; base = 10; digit = 0;
+ for (;;) {
+ if (isdigit(c)) {
+ val = (val * base) + (c - '0');
+ c = *++cp;
+ digit = 1;
+ } else {
+ break;
+ }
+ }
+ if (c == '.') {
+ /*
+ * Internet format:
+ * a.b.c.d
+ * a.b.c (with c treated as 16 bits)
+ * a.b (with b treated as 24 bits)
+ */
+ if (pp > res.bytes + 2 || val > 0xff) {
+ goto ret_0;
+ }
+ *pp++ = val;
+ c = *++cp;
+ } else
+ break;
+ }
+ /*
+ * Check for trailing characters.
+ */
+ if (c != '\0' && (!isascii(c) || !isspace(c))) {
+ goto ret_0;
+ }
+ /*
+ * Did we get a valid digit?
+ */
+ if (!digit) {
+ goto ret_0;
+ }
+
+ /* Check whether the last part is in its limits depending on
+ the number of parts in total. */
+ if (val > max[pp - res.bytes]) {
+ goto ret_0;
+ }
+
+ if (the_addr != NULL) {
+ *the_addr = res.word | htonl (val);
+ }
+
+ return (1);
+
+ret_0:
+ return (0);
+}
+
+static int bond_sethwaddr(struct net_device *master, struct net_device *slave)
+{
+#ifdef BONDING_DEBUG
+ printk(KERN_CRIT "bond_sethwaddr: master=%x\n", (unsigned int)master);
+ printk(KERN_CRIT "bond_sethwaddr: slave=%x\n", (unsigned int)slave);
+ printk(KERN_CRIT "bond_sethwaddr: slave->addr_len=%d\n",
slave->addr_len);
+#endif
+ memcpy(master->dev_addr, slave->dev_addr, slave->addr_len);
+ return 0;
+}
+
+static int bond_info_query(struct net_device *master, struct ifbond *info)
+{
+ bonding_t *bond = (struct bonding *) master->priv;
+ slave_t *slave;
+ unsigned long flags;
+
+ info->bond_mode = bond_mode;
+ info->num_slaves = 0;
+ info->miimon = miimon;
+
+ read_lock_irqsave(&bond->lock, flags);
+ for (slave = bond->prev; slave != (slave_t *)bond; slave = slave->prev)
{
+ info->num_slaves++;
+ }
+ read_unlock_irqrestore(&bond->lock, flags);
+
+ return 0;
+}
+
+static int bond_slave_info_query(struct net_device *master,
+ struct ifslave *info)
+{
+ bonding_t *bond = (struct bonding *) master->priv;
+ slave_t *slave;
+ int cur_ndx = 0;
+ unsigned long flags;
+
+ if (info->slave_id < 0) {
+ return -ENODEV;
+ }
+
+ read_lock_irqsave(&bond->lock, flags);
+ for (slave = bond->prev;
+ slave != (slave_t *)bond && cur_ndx < info->slave_id;
+ slave = slave->prev) {
+ cur_ndx++;
+ }
+ read_unlock_irqrestore(&bond->lock, flags);
+
+ if (slave != (slave_t *)bond) {
+ 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;
+}
+
+static int bond_ioctl(struct net_device *master_dev, struct ifreq *ifr, int
cmd)
+{
+ struct net_device *slave_dev = NULL;
+ struct ifbond *u_binfo = NULL, k_binfo;
+ struct ifslave *u_sinfo = NULL, k_sinfo;
+ struct mii_ioctl_data *mii = NULL;
+ int ret = 0;
+
+#ifdef BONDING_DEBUG
+ printk(KERN_INFO "bond_ioctl: master=%s, cmd=%d\n",
+ master_dev->name, cmd);
+#endif
+
+ switch (cmd) {
+ case SIOCGMIIPHY:
+ mii = (struct mii_ioctl_data *)&ifr->ifr_data;
+ if (mii == NULL) {
+ 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 = (struct mii_ioctl_data *)&ifr->ifr_data;
+ if (mii == NULL) {
+ return -EINVAL;
+ }
+ if (mii->reg_num == 1) {
+ mii->val_out = bond_check_mii_link(
+ (struct bonding *)master_dev->priv);
+ }
+ return 0;
+ case BOND_INFO_QUERY_OLD:
+ case SIOCBONDINFOQUERY:
+ u_binfo = (struct ifbond *)ifr->ifr_data;
+ if (copy_from_user(&k_binfo, u_binfo, sizeof(ifbond))) {
+ return -EFAULT;
+ }
+ ret = bond_info_query(master_dev, &k_binfo);
+ if (ret == 0) {
+ if (copy_to_user(u_binfo, &k_binfo, sizeof(ifbond))) {
+ return -EFAULT;
+ }
+ }
+ return ret;
+ case BOND_SLAVE_INFO_QUERY_OLD:
+ case SIOCBONDSLAVEINFOQUERY:
+ u_sinfo = (struct ifslave *)ifr->ifr_data;
+ if (copy_from_user(&k_sinfo, u_sinfo, sizeof(ifslave))) {
+ return -EFAULT;
+ }
+ ret = bond_slave_info_query(master_dev, &k_sinfo);
+ if (ret == 0) {
+ if (copy_to_user(u_sinfo, &k_sinfo, sizeof(ifslave))) {
+ return -EFAULT;
+ }
+ }
+ return ret;
+ }
+
+ if (!capable(CAP_NET_ADMIN)) {
+ return -EPERM;
+ }
+
+ slave_dev = dev_get_by_name(ifr->ifr_slave);
+
+#ifdef BONDING_DEBUG
+ printk(KERN_INFO "slave_dev=%x: \n", (unsigned int)slave_dev);
+ printk(KERN_INFO "slave_dev->name=%s: \n", slave_dev->name);
+#endif
+
+ if (slave_dev == NULL) {
+ ret = -ENODEV;
+ } else {
+ switch (cmd) {
+ case BOND_ENSLAVE_OLD:
+ case SIOCBONDENSLAVE:
+ ret = bond_enslave(master_dev, slave_dev);
+ break;
+ case BOND_RELEASE_OLD:
+ case SIOCBONDRELEASE:
+ ret = bond_release(master_dev, slave_dev);
+ break;
+ case BOND_SETHWADDR_OLD:
+ case SIOCBONDSETHWADDR:
+ ret = bond_sethwaddr(master_dev, slave_dev);
+ break;
+ case BOND_CHANGE_ACTIVE_OLD:
+ case SIOCBONDCHANGEACTIVE:
+ if (bond_mode == BOND_MODE_ACTIVEBACKUP) {
+ ret = bond_change_active(master_dev, slave_dev);
+ }
+ else {
+ ret = -EINVAL;
+ }
+ break;
+ default:
+ ret = -EOPNOTSUPP;
+ }
+ dev_put(slave_dev);
+ }
+ return ret;
+}
+
+#ifdef CONFIG_NET_FASTROUTE
+static int bond_accept_fastpath(struct net_device *dev, struct dst_entry *dst)
+{
+ return -1;
+}
+#endif
+
+/*
+ * in broadcast mode, we send everything to all usable interfaces.
+ */
+static int bond_xmit_broadcast(struct sk_buff *skb, struct net_device *dev)
+{
+ slave_t *slave, *start_at;
+ struct bonding *bond = (struct bonding *) dev->priv;
+ unsigned long flags;
+ struct net_device *device_we_should_send_to = 0;
+
+ if (!IS_UP(dev)) { /* bond down */
+ dev_kfree_skb(skb);
+ return 0;
+ }
+
+ read_lock_irqsave(&bond->lock, flags);
+
+ read_lock(&bond->ptrlock);
+ slave = start_at = bond->current_slave;
+ read_unlock(&bond->ptrlock);
+
+ if (slave == NULL) { /* we're at the root, get the first slave */
+ /* no suitable interface, frame not sent */
+ read_unlock_irqrestore(&bond->lock, flags);
+ dev_kfree_skb(skb);
+ return 0;
+ }
+
+ do {
+ if (IS_UP(slave->dev)
+ && (slave->link == BOND_LINK_UP)
+ && (slave->state == BOND_STATE_ACTIVE)) {
+ if (device_we_should_send_to) {
+ struct sk_buff *skb2;
+ if ((skb2 = skb_clone(skb, GFP_ATOMIC)) ==
NULL) {
+ printk(KERN_ERR "bond_xmit_broadcast:
skb_clone() failed\n");
+ continue;
+ }
+
+ skb2->dev = device_we_should_send_to;
+ skb2->priority = 1;
+ dev_queue_xmit(skb2);
+ }
+ device_we_should_send_to = slave->dev;
+ }
+ } while ((slave = slave->next) != start_at);
+
+ if (device_we_should_send_to) {
+ skb->dev = device_we_should_send_to;
+ skb->priority = 1;
+ dev_queue_xmit(skb);
+ } else
+ dev_kfree_skb(skb);
+
+ /* frame sent to all suitable interfaces */
+ read_unlock_irqrestore(&bond->lock, flags);
+ return 0;
+}
+
+static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *dev)
+{
+ slave_t *slave, *start_at;
+ struct bonding *bond = (struct bonding *) dev->priv;
+ unsigned long flags;
+
+ if (!IS_UP(dev)) { /* bond down */
+ dev_kfree_skb(skb);
+ return 0;
+ }
+
+ read_lock_irqsave(&bond->lock, flags);
+
+ read_lock(&bond->ptrlock);
+ slave = start_at = bond->current_slave;
+ read_unlock(&bond->ptrlock);
+
+ if (slave == NULL) { /* we're at the root, get the first slave */
+ /* no suitable interface, frame not sent */
+ dev_kfree_skb(skb);
+ read_unlock_irqrestore(&bond->lock, flags);
+ return 0;
+ }
+
+ do {
+ if (IS_UP(slave->dev)
+ && (slave->link == BOND_LINK_UP)
+ && (slave->state == BOND_STATE_ACTIVE)) {
+
+ skb->dev = slave->dev;
+ skb->priority = 1;
+ dev_queue_xmit(skb);
+
+ write_lock(&bond->ptrlock);
+ bond->current_slave = slave->next;
+ write_unlock(&bond->ptrlock);
+
+ read_unlock_irqrestore(&bond->lock, flags);
+ return 0;
+ }
+ } while ((slave = slave->next) != start_at);
+
+ /* no suitable interface, frame not sent */
+ dev_kfree_skb(skb);
+ read_unlock_irqrestore(&bond->lock, flags);
+ 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 *dev)
+{
+ slave_t *slave, *start_at;
+ struct bonding *bond = (struct bonding *) dev->priv;
+ unsigned long flags;
+ struct ethhdr *data = (struct ethhdr *)skb->data;
+ int slave_no;
+
+ if (!IS_UP(dev)) { /* bond down */
+ dev_kfree_skb(skb);
+ return 0;
+ }
+
+ read_lock_irqsave(&bond->lock, flags);
+ slave = bond->prev;
+
+ /* we're at the root, get the first slave */
+ if (bond->slave_cnt == 0) {
+ /* no suitable interface, frame not sent */
+ dev_kfree_skb(skb);
+ read_unlock_irqrestore(&bond->lock, flags);
+ return 0;
+ }
+
+ slave_no = (data->h_dest[5]^slave->dev->dev_addr[5]) % bond->slave_cnt;
+
+ while ( (slave_no > 0) && (slave != (slave_t *)bond) ) {
+ slave = slave->prev;
+ slave_no--;
+ }
+ start_at = slave;
+
+ do {
+ if (IS_UP(slave->dev)
+ && (slave->link == BOND_LINK_UP)
+ && (slave->state == BOND_STATE_ACTIVE)) {
+
+ skb->dev = slave->dev;
+ skb->priority = 1;
+ dev_queue_xmit(skb);
+
+ read_unlock_irqrestore(&bond->lock, flags);
+ return 0;
+ }
+ } while ((slave = slave->next) != start_at);
+
+ /* no suitable interface, frame not sent */
+ dev_kfree_skb(skb);
+ read_unlock_irqrestore(&bond->lock, flags);
+ return 0;
+}
+
+/*
+ * in active-backup mode, we know that bond->current_slave is always valid if
+ * the bond has a usable interface.
+ */
+static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *dev)
+{
+ struct bonding *bond = (struct bonding *) dev->priv;
+ unsigned long flags;
+ int ret;
+
+ if (!IS_UP(dev)) { /* bond down */
+ dev_kfree_skb(skb);
+ return 0;
+ }
+
+ /* if we are sending arp packets, try to at least
+ identify our own ip address */
+ if ( (arp_interval > 0) && (my_ip == 0) &&
+ (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);
+ }
+
+ /* if we are sending arp packets and don't know
+ * the target hw address, save it so we don't need
+ * to use a broadcast address.
+ * don't do this if in active backup mode because the slaves must
+ * receive packets to stay up, and the only ones they receive are
+ * broadcasts.
+ */
+ if ( (bond_mode != BOND_MODE_ACTIVEBACKUP) &&
+ (arp_ip_count == 1) &&
+ (arp_interval > 0) && (arp_target_hw_addr == NULL) &&
+ (skb->protocol == __constant_htons(ETH_P_IP) ) ) {
+ struct ethhdr *eth_hdr =
+ (struct ethhdr *) (((char *)skb->data));
+ struct iphdr *ip_hdr = (struct iphdr *)(eth_hdr + 1);
+
+ if (arp_target[0] == ip_hdr->daddr) {
+ arp_target_hw_addr = kmalloc(ETH_ALEN, GFP_KERNEL);
+ if (arp_target_hw_addr != NULL)
+ memcpy(arp_target_hw_addr, eth_hdr->h_dest,
ETH_ALEN);
+ }
+ }
+
+ read_lock_irqsave(&bond->lock, flags);
+
+ read_lock(&bond->ptrlock);
+ if (bond->current_slave != NULL) { /* one usable interface */
+ skb->dev = bond->current_slave->dev;
+ read_unlock(&bond->ptrlock);
+ skb->priority = 1;
+ ret = dev_queue_xmit(skb);
+ read_unlock_irqrestore(&bond->lock, flags);
+ return 0;
+ }
+ else {
+ read_unlock(&bond->ptrlock);
+ }
+
+ /* no suitable interface, frame not sent */
+#ifdef BONDING_DEBUG
+ printk(KERN_INFO "There was no suitable interface, so we don't
transmit\n");
+#endif
+ dev_kfree_skb(skb);
+ read_unlock_irqrestore(&bond->lock, flags);
+ return 0;
+}
+
+static struct net_device_stats *bond_get_stats(struct net_device *dev)
+{
+ bonding_t *bond = dev->priv;
+ struct net_device_stats *stats = bond->stats, *sstats;
+ slave_t *slave;
+ unsigned long flags;
+
+ memset(bond->stats, 0, sizeof(struct net_device_stats));
+
+ read_lock_irqsave(&bond->lock, flags);
+
+ for (slave = bond->prev; slave != (slave_t *)bond; slave = slave->prev)
{
+ 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_irqrestore(&bond->lock, flags);
+ return stats;
+}
+
+static int bond_get_info(char *buf, char **start, off_t offset, int length)
+{
+ bonding_t *bond = these_bonds;
+ int len = 0;
+ off_t begin = 0;
+ u16 link;
+ slave_t *slave = NULL;
+ unsigned long flags;
+
+ while (bond != NULL) {
+ /*
+ * This function locks the mutex, so we can't lock it until
+ * afterwards
+ */
+ link = bond_check_mii_link(bond);
+
+ len += sprintf(buf + len, "Bonding Mode: %s\n",
+ bond_mode_name());
+
+ if (bond_mode == BOND_MODE_ACTIVEBACKUP) {
+ read_lock_irqsave(&bond->lock, flags);
+ read_lock(&bond->ptrlock);
+ if (bond->current_slave != NULL) {
+ len += sprintf(buf + len,
+ "Currently Active Slave: %s\n",
+ bond->current_slave->dev->name);
+ }
+ read_unlock(&bond->ptrlock);
+ read_unlock_irqrestore(&bond->lock, flags);
+ }
+
+ len += sprintf(buf + len, "MII Status: ");
+ len += sprintf(buf + len,
+ link == BMSR_LSTATUS ? "up\n" : "down\n");
+ len += sprintf(buf + len, "MII Polling Interval (ms): %d\n",
+ miimon);
+ len += sprintf(buf + len, "Up Delay (ms): %d\n",
+ updelay * miimon);
+ len += sprintf(buf + len, "Down Delay (ms): %d\n",
+ downdelay * miimon);
+ len += sprintf(buf + len, "Multicast Mode: %s\n",
+ multicast_mode_name());
+
+ read_lock_irqsave(&bond->lock, flags);
+ for (slave = bond->prev; slave != (slave_t *)bond;
+ slave = slave->prev) {
+ len += sprintf(buf + len, "\nSlave Interface: %s\n",
slave->dev->name);
+
+ len += sprintf(buf + len, "MII Status: ");
+
+ len += sprintf(buf + len,
+ slave->link == BOND_LINK_UP ?
+ "up\n" : "down\n");
+ len += sprintf(buf + len, "Link Failure Count: %d\n",
+ slave->link_failure_count);
+
+ len += sprintf(buf + len,
+ "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]);
+ }
+ read_unlock_irqrestore(&bond->lock, flags);
+
+ /*
+ * Figure out the calcs for the /proc/net interface
+ */
+ *start = buf + (offset - begin);
+ len -= (offset - begin);
+ if (len > length) {
+ len = length;
+ }
+ if (len < 0) {
+ len = 0;
+ }
+
+
+ bond = bond->next_bond;
+ }
+ return len;
+}
+
+static int bond_event(struct notifier_block *this, unsigned long event,
+ void *ptr)
+{
+ struct bonding *this_bond = (struct bonding *)these_bonds;
+ struct bonding *last_bond;
+ struct net_device *event_dev = (struct net_device *)ptr;
+
+ /* while there are bonds configured */
+ while (this_bond != NULL) {
+ if (this_bond == event_dev->priv ) {
+ switch (event) {
+ case NETDEV_UNREGISTER:
+ /*
+ * remove this bond from a linked list of
+ * bonds
+ */
+ if (this_bond == these_bonds) {
+ these_bonds = this_bond->next_bond;
+ } else {
+ for (last_bond = these_bonds;
+ last_bond != NULL;
+ last_bond = last_bond->next_bond) {
+ if (last_bond->next_bond ==
+ this_bond) {
+ last_bond->next_bond =
+ this_bond->next_bond;
+ }
+ }
+ }
+ return NOTIFY_DONE;
+
+ default:
+ return NOTIFY_DONE;
+ }
+ } else if (this_bond->device == event_dev->master) {
+ switch (event) {
+ case NETDEV_UNREGISTER:
+ bond_release(this_bond->device, event_dev);
+ break;
+ }
+ return NOTIFY_DONE;
+ }
+ this_bond = this_bond->next_bond;
+ }
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block bond_netdev_notifier = {
+ notifier_call: bond_event,
+};
+
+static int __init bond_init(struct net_device *dev)
+{
+ bonding_t *bond, *this_bond, *last_bond;
+ int count;
+
+#ifdef BONDING_DEBUG
+ printk (KERN_INFO "Begin bond_init for %s\n", dev->name);
+#endif
+ bond = kmalloc(sizeof(struct bonding), GFP_KERNEL);
+ if (bond == NULL) {
+ return -ENOMEM;
+ }
+ memset(bond, 0, sizeof(struct bonding));
+
+ /* initialize rwlocks */
+ rwlock_init(&bond->lock);
+ rwlock_init(&bond->ptrlock);
+
+ bond->stats = kmalloc(sizeof(struct net_device_stats), GFP_KERNEL);
+ if (bond->stats == NULL) {
+ kfree(bond);
+ return -ENOMEM;
+ }
+ memset(bond->stats, 0, sizeof(struct net_device_stats));
+
+ bond->next = bond->prev = (slave_t *)bond;
+ bond->current_slave = NULL;
+ bond->current_arp_slave = NULL;
+ bond->device = dev;
+ dev->priv = bond;
+
+ /* Initialize the device structure. */
+ switch (bond_mode) {
+ case BOND_MODE_ACTIVEBACKUP:
+ dev->hard_start_xmit = bond_xmit_activebackup;
+ break;
+ case BOND_MODE_ROUNDROBIN:
+ dev->hard_start_xmit = bond_xmit_roundrobin;
+ break;
+ case BOND_MODE_XOR:
+ dev->hard_start_xmit = bond_xmit_xor;
+ break;
+ case BOND_MODE_BROADCAST:
+ dev->hard_start_xmit = bond_xmit_broadcast;
+ break;
+ default:
+ printk(KERN_ERR "Unknown bonding mode %d\n", bond_mode);
+ kfree(bond->stats);
+ kfree(bond);
+ return -EINVAL;
+ }
+
+ dev->get_stats = bond_get_stats;
+ dev->open = bond_open;
+ dev->stop = bond_close;
+ dev->set_multicast_list = set_multicast_list;
+ dev->do_ioctl = bond_ioctl;
+
+ /*
+ * Fill in the fields of the device structure with ethernet-generic
+ * values.
+ */
+
+ ether_setup(dev);
+
+ dev->tx_queue_len = 0;
+ dev->flags |= IFF_MASTER|IFF_MULTICAST;
+#ifdef CONFIG_NET_FASTROUTE
+ dev->accept_fastpath = bond_accept_fastpath;
+#endif
+
+ printk(KERN_INFO "%s registered with", dev->name);
+ if (miimon > 0) {
+ printk(" MII link monitoring set to %d ms", miimon);
+ updelay /= miimon;
+ downdelay /= miimon;
+ } else {
+ printk("out MII link monitoring");
+ }
+ printk(", in %s mode.\n", bond_mode_name());
+
+ printk(KERN_INFO "%s registered with", dev->name);
+ if (arp_interval > 0) {
+ printk(" ARP monitoring set to %d ms with %d target(s):",
+ arp_interval, arp_ip_count);
+ for (count=0 ; count<arp_ip_count ; count++)
+ printk (" %s", arp_ip_target[count]);
+ printk("\n");
+ } else {
+ printk("out ARP monitoring\n");
+ }
+
+#ifdef CONFIG_PROC_FS
+ bond->bond_proc_dir = proc_mkdir(dev->name, proc_net);
+ if (bond->bond_proc_dir == NULL) {
+ printk(KERN_ERR "%s: Cannot init /proc/net/%s/\n",
+ dev->name, dev->name);
+ kfree(bond->stats);
+ kfree(bond);
+ return -ENOMEM;
+ }
+ bond->bond_proc_info_file =
+ create_proc_info_entry("info", 0, bond->bond_proc_dir,
+ bond_get_info);
+ if (bond->bond_proc_info_file == NULL) {
+ printk(KERN_ERR "%s: Cannot init /proc/net/%s/info\n",
+ dev->name, dev->name);
+ remove_proc_entry(dev->name, proc_net);
+ kfree(bond->stats);
+ kfree(bond);
+ return -ENOMEM;
+ }
+#endif /* CONFIG_PROC_FS */
+
+ if (first_pass == 1) {
+ these_bonds = bond;
+ register_netdevice_notifier(&bond_netdev_notifier);
+ first_pass = 0;
+ } else {
+ last_bond = these_bonds;
+ this_bond = these_bonds->next_bond;
+ while (this_bond != NULL) {
+ last_bond = this_bond;
+ this_bond = this_bond->next_bond;
+ }
+ last_bond->next_bond = bond;
+ }
+
+ return 0;
+}
+
+/*
+static int __init bond_probe(struct net_device *dev)
+{
+ bond_init(dev);
+ return 0;
+}
+ */
+
+/*
+ * 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 != NULL; i++) {
+ if ((isdigit(*mode_arg) &&
+ tbl[i].mode == simple_strtol(mode_arg, NULL, 0)) ||
+ (0 == strncmp(mode_arg, tbl[i].modename,
+ strlen(tbl[i].modename)))) {
+ return tbl[i].mode;
+ }
+ }
+
+ return -1;
+}
+
+
+static int __init bonding_init(void)
+{
+ int no;
+ int err;
+
+ /* Find a name for this unit */
+ static struct net_device *dev_bond = NULL;
+
+ printk(KERN_INFO "%s", version);
+
+ /*
+ * Convert string parameters.
+ */
+ if (mode) {
+ bond_mode = bond_parse_parm(mode, bond_mode_tbl);
+ if (bond_mode == -1) {
+ printk(KERN_WARNING
+ "bonding_init(): Invalid bonding mode \"%s\"\n",
+ mode == NULL ? "NULL" : mode);
+ return -EINVAL;
+ }
+ }
+
+ if (multicast) {
+ multicast_mode = bond_parse_parm(multicast, bond_mc_tbl);
+ if (multicast_mode == -1) {
+ printk(KERN_WARNING
+ "bonding_init(): Invalid multicast mode \"%s\"\n",
+ multicast == NULL ? "NULL" : multicast);
+ return -EINVAL;
+ }
+ }
+
+ if (max_bonds < 1 || max_bonds > INT_MAX) {
+ printk(KERN_WARNING
+ "bonding_init(): 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;
+ }
+ dev_bond = dev_bonds = kmalloc(max_bonds*sizeof(struct net_device),
+ GFP_KERNEL);
+ if (dev_bond == NULL) {
+ return -ENOMEM;
+ }
+ memset(dev_bonds, 0, max_bonds*sizeof(struct net_device));
+
+ if (miimon < 0) {
+ printk(KERN_WARNING
+ "bonding_init(): 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
+ "bonding_init(): 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
+ "bonding_init(): downdelay module parameter (%d), "
+ "not in range 0-%d, so it was reset to 0\n",
+ downdelay, INT_MAX);
+ downdelay = 0;
+ }
+
+ if (miimon == 0) {
+ if ((updelay != 0) || (downdelay != 0)) {
+ /* just warn the user the up/down delay will have
+ * no effect since miimon is zero...
+ */
+ printk(KERN_WARNING
+ "bonding_init(): 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 != 0) {
+ printk(KERN_WARNING
+ "bonding_init(): 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) {
+ /* updelay will be rounded in bond_init() when it
+ * is divided by miimon, we just inform user here
+ */
+ printk(KERN_WARNING
+ "bonding_init(): updelay (%d) is not a multiple "
+ "of miimon (%d), updelay rounded to %d ms\n",
+ updelay, miimon, (updelay / miimon) * miimon);
+ }
+
+ if ((downdelay % miimon) != 0) {
+ /* downdelay will be rounded in bond_init() when it
+ * is divided by miimon, we just inform user here
+ */
+ printk(KERN_WARNING
+ "bonding_init(): downdelay (%d) is not a "
+ "multiple of miimon (%d), downdelay rounded "
+ "to %d ms\n",
+ downdelay, miimon,
+ (downdelay / miimon) * miimon);
+ }
+ }
+
+ if (arp_interval < 0) {
+ printk(KERN_WARNING
+ "bonding_init(): 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 < MAX_ARP_IP_TARGETS) &&
arp_ip_target[arp_ip_count];
+ arp_ip_count++ ) {
+ /* TODO: check and log bad ip address */
+ if (my_inet_aton(arp_ip_target[arp_ip_count],
+ &arp_target[arp_ip_count]) == 0) {
+ printk(KERN_WARNING
+ "bonding_init(): bad arp_ip_target module "
+ "parameter (%s), ARP monitoring will not be "
+ "performed\n",
+ arp_ip_target[arp_ip_count]);
+ arp_interval = 0;
+ }
+ }
+
+
+ if ( (arp_interval > 0) && (arp_ip_count==0)) {
+ /* don't allow arping if no arp_ip_target given... */
+ printk(KERN_WARNING
+ "bonding_init(): 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 == 0) && (arp_interval == 0)) {
+ /* miimon and arp_interval not set, we need one so things
+ * work as expected, see bonding.txt for details
+ */
+ printk(KERN_ERR
+ "bonding_init(): 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 != NULL) && (bond_mode != BOND_MODE_ACTIVEBACKUP)){
+ /* currently, using a primary only makes sence
+ * in active backup mode
+ */
+ printk(KERN_WARNING
+ "bonding_init(): %s primary device specified but has "
+ " no effect in %s mode\n",
+ primary, bond_mode_name());
+ primary = NULL;
+ }
+
+
+ for (no = 0; no < max_bonds; no++) {
+ dev_bond->init = bond_init;
+
+ err = dev_alloc_name(dev_bond,"bond%d");
+ if (err < 0) {
+ kfree(dev_bonds);
+ return err;
+ }
+ SET_MODULE_OWNER(dev_bond);
+ if (register_netdev(dev_bond) != 0) {
+ kfree(dev_bonds);
+ return -EIO;
+ }
+ dev_bond++;
+ }
+ return 0;
+}
+
+static void __exit bonding_exit(void)
+{
+ struct net_device *dev_bond = dev_bonds;
+ struct bonding *bond;
+ int no;
+
+ unregister_netdevice_notifier(&bond_netdev_notifier);
+
+ for (no = 0; no < max_bonds; no++) {
+
+#ifdef CONFIG_PROC_FS
+ bond = (struct bonding *) dev_bond->priv;
+ remove_proc_entry("info", bond->bond_proc_dir);
+ remove_proc_entry(dev_bond->name, proc_net);
+#endif
+ unregister_netdev(dev_bond);
+ kfree(bond->stats);
+ kfree(dev_bond->priv);
+
+ dev_bond->priv = NULL;
+ dev_bond++;
+ }
+ kfree(dev_bonds);
+}
+
+module_init(bonding_init);
+module_exit(bonding_exit);
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION(DRV_DESCRIPTION ", v" DRV_VERSION);
+
+/*
+ * Local variables:
+ * c-indent-level: 8
+ * c-basic-offset: 8
+ * tab-width: 8
+ * End:
+ */
diff -Nuarp linux-2.4.20-bonding-20030317/drivers/net/bonding/Makefile
linux-2.4.20-bonding-20030317-devel/drivers/net/bonding/Makefile
--- linux-2.4.20-bonding-20030317/drivers/net/bonding/Makefile 1970-01-01
02:00:00.000000000 +0200
+++ linux-2.4.20-bonding-20030317-devel/drivers/net/bonding/Makefile
2003-03-18 17:03:29.000000000 +0200
@@ -0,0 +1,12 @@
+#
+# Makefile for the Ethernet Bonding driver
+#
+
+O_TARGET := bonding.o
+
+obj-y := bond_main.o
+
+obj-m := $(O_TARGET)
+
+include $(TOPDIR)/Rules.make
+
diff -Nuarp linux-2.4.20-bonding-20030317/drivers/net/bonding.c
linux-2.4.20-bonding-20030317-devel/drivers/net/bonding.c
--- linux-2.4.20-bonding-20030317/drivers/net/bonding.c 2003-03-18
17:03:29.000000000 +0200
+++ linux-2.4.20-bonding-20030317-devel/drivers/net/bonding.c 1970-01-01
02:00:00.000000000 +0200
@@ -1,3434 +0,0 @@
-/*
- * originally based on the dummy device.
- *
- * Copyright 1999, Thomas Davis, tadavis@xxxxxxxx
- * 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@xxxxxxxxxxxxxxxx>
- * - 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 current_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() while traffic is 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(): netdev_set_master() must not be
- * called from within the bond lock while traffic is running.
- *
- * 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.
- */
-
-#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 <asm/system.h>
-#include <asm/bitops.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/if_bonding.h>
-#include <linux/smp.h>
-#include <linux/if_ether.h>
-#include <net/arp.h>
-#include <linux/mii.h>
-#include <linux/ethtool.h>
-
-#define DRV_VERSION "2.4.20-20030317"
-#define DRV_RELDATE "March 17, 2003"
-#define DRV_NAME "bonding"
-#define DRV_DESCRIPTION "Ethernet Channel Bonding Driver"
-
-static const char *version =
-DRV_NAME ".c:v" DRV_VERSION " (" DRV_RELDATE ")\n";
-
-/* monitor all links that often (in milliseconds). <=0 disables monitoring */
-#ifndef BOND_LINK_MON_INTERV
-#define BOND_LINK_MON_INTERV 0
-#endif
-
-#ifndef BOND_LINK_ARP_INTERV
-#define BOND_LINK_ARP_INTERV 0
-#endif
-
-#ifndef MAX_ARP_IP_TARGETS
-#define MAX_ARP_IP_TARGETS 16
-#endif
-
-static int arp_interval = BOND_LINK_ARP_INTERV;
-static char *arp_ip_target[MAX_ARP_IP_TARGETS] = { NULL, };
-static unsigned long arp_target[MAX_ARP_IP_TARGETS] = { 0, } ;
-static int arp_ip_count = 0;
-static u32 my_ip = 0;
-char *arp_target_hw_addr = NULL;
-
-static char *primary= NULL;
-
-static int max_bonds = BOND_DEFAULT_MAX_BONDS;
-static int miimon = BOND_LINK_MON_INTERV;
-static int use_carrier = 1;
-static int bond_mode = BOND_MODE_ROUNDROBIN;
-static int updelay = 0;
-static int downdelay = 0;
-
-static char *mode = NULL;
-
-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},
-{ NULL, -1},
-};
-
-static int multicast_mode = BOND_MULTICAST_ALL;
-static char *multicast = NULL;
-
-static struct bond_parm_tbl bond_mc_tbl[] = {
-{ "disabled", BOND_MULTICAST_DISABLED},
-{ "active", BOND_MULTICAST_ACTIVE},
-{ "all", BOND_MULTICAST_ALL},
-{ NULL, -1},
-};
-
-static int first_pass = 1;
-static struct bonding *these_bonds = NULL;
-static struct net_device *dev_bonds = NULL;
-
-MODULE_PARM(max_bonds, "i");
-MODULE_PARM_DESC(max_bonds, "Max number of bonded devices");
-MODULE_PARM(miimon, "i");
-MODULE_PARM_DESC(miimon, "Link check interval in milliseconds");
-MODULE_PARM(use_carrier, "i");
-MODULE_PARM_DESC(use_carrier, "Use netif_carrier_ok (vs MII ioctls) in miimon;
09 for off, 1 for on (default)");
-MODULE_PARM(mode, "s");
-MODULE_PARM_DESC(mode, "Mode of operation : 0 for round robin, 1 for
active-backup, 2 for xor");
-MODULE_PARM(arp_interval, "i");
-MODULE_PARM_DESC(arp_interval, "arp interval in milliseconds");
-MODULE_PARM(arp_ip_target, "1-" __MODULE_STRING(MAX_ARP_IP_TARGETS) "s");
-MODULE_PARM_DESC(arp_ip_target, "arp targets in n.n.n.n form");
-MODULE_PARM(updelay, "i");
-MODULE_PARM_DESC(updelay, "Delay before considering link up, in milliseconds");
-MODULE_PARM(downdelay, "i");
-MODULE_PARM_DESC(downdelay, "Delay before considering link down, in
milliseconds");
-MODULE_PARM(primary, "s");
-MODULE_PARM_DESC(primary, "Primary network device to use");
-MODULE_PARM(multicast, "s");
-MODULE_PARM_DESC(multicast, "Mode for multicast support : 0 for none, 1 for
active slave, 2 for all slaves (default)");
-
-static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *dev);
-static int bond_xmit_xor(struct sk_buff *skb, struct net_device *dev);
-static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *dev);
-static struct net_device_stats *bond_get_stats(struct net_device *dev);
-static void bond_mii_monitor(struct net_device *dev);
-static void loadbalance_arp_monitor(struct net_device *dev);
-static void activebackup_arp_monitor(struct net_device *dev);
-static int bond_event(struct notifier_block *this, unsigned long event, void
*ptr);
-static void bond_mc_list_destroy(struct bonding *bond);
-static void bond_mc_add(bonding_t *bond, void *addr, int alen);
-static void bond_mc_delete(bonding_t *bond, void *addr, int alen);
-static int bond_mc_list_copy (struct dev_mc_list *src, struct bonding *dst,
int gpf_flag);
-static inline int dmi_same(struct dev_mc_list *dmi1, struct dev_mc_list *dmi2);
-static void bond_set_promiscuity(bonding_t *bond, int inc);
-static void bond_set_allmulti(bonding_t *bond, int inc);
-static struct dev_mc_list* bond_mc_list_find_dmi(struct dev_mc_list *dmi,
struct dev_mc_list *mc_list);
-static void bond_mc_update(bonding_t *bond, slave_t *new, slave_t *old);
-static void bond_set_slave_inactive_flags(slave_t *slave);
-static void bond_set_slave_active_flags(slave_t *slave);
-static int bond_enslave(struct net_device *master, struct net_device *slave);
-static int bond_release(struct net_device *master, struct net_device *slave);
-static int bond_release_all(struct net_device *master);
-static int bond_sethwaddr(struct net_device *master, struct net_device *slave);
-
-/*
- * bond_get_info is the interface into the /proc filesystem. This is
- * a different interface than the BOND_INFO_QUERY ioctl. That is done
- * through the generic networking ioctl interface, and bond_info_query
- * is the internal function which provides that information.
- */
-static int bond_get_info(char *buf, char **start, off_t offset, int length);
-
-/* #define BONDING_DEBUG 1 */
-
-/* several macros */
-
-#define IS_UP(dev) ((((dev)->flags & (IFF_UP)) == (IFF_UP)) && \
- (netif_running(dev) && netif_carrier_ok(dev)))
-
-static void arp_send_all(slave_t *slave)
-{
- int i;
-
- for (i = 0; (i<MAX_ARP_IP_TARGETS) && arp_target[i]; i++) {
- arp_send(ARPOP_REQUEST, ETH_P_ARP, arp_target[i], slave->dev,
- my_ip, arp_target_hw_addr, slave->dev->dev_addr,
- arp_target_hw_addr);
- }
-}
-
-
-static const char *
-bond_mode_name(void)
-{
- switch (bond_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)";
- default :
- return "unknown";
- }
-}
-
-static const char *
-multicast_mode_name(void)
-{
- switch(multicast_mode) {
- case BOND_MULTICAST_DISABLED :
- return "disabled";
- case BOND_MULTICAST_ACTIVE :
- return "active slave only";
- case BOND_MULTICAST_ALL :
- return "all slaves";
- default :
- return "unknown";
- }
-}
-
-static void bond_set_slave_inactive_flags(slave_t *slave)
-{
- slave->state = BOND_STATE_BACKUP;
- slave->dev->flags |= IFF_NOARP;
-}
-
-static void bond_set_slave_active_flags(slave_t *slave)
-{
- slave->state = BOND_STATE_ACTIVE;
- slave->dev->flags &= ~IFF_NOARP;
-}
-
-/*
- * This function counts and verifies the the number of attached
- * slaves, checking the count against the expected value (given that incr
- * is either 1 or -1, for add or removal of a slave). Only
- * bond_xmit_xor() uses the slave_cnt value, but this is still a good
- * consistency check.
- */
-static inline void
-update_slave_cnt(bonding_t *bond, int incr)
-{
- slave_t *slave = NULL;
- int expect = bond->slave_cnt + incr;
-
- bond->slave_cnt = 0;
- for (slave = bond->prev; slave != (slave_t*)bond;
- slave = slave->prev) {
- bond->slave_cnt++;
- }
-
- if (expect != bond->slave_cnt)
- BUG();
-}
-
-/*
- * This function detaches the slave <slave> from the list <bond>.
- * WARNING: no check is made to verify if the slave effectively
- * belongs to <bond>. It returns <slave> in case it's needed.
- * Nothing is freed on return, structures are just unchained.
- * If the bond->current_slave pointer was pointing to <slave>,
- * it's replaced with slave->next, or <bond> if not applicable.
- *
- * bond->lock held by caller.
- */
-static slave_t *
-bond_detach_slave(bonding_t *bond, slave_t *slave)
-{
- if ((bond == NULL) || (slave == NULL) ||
- ((void *)bond == (void *)slave)) {
- printk(KERN_ERR
- "bond_detach_slave(): trying to detach "
- "slave %p from bond %p\n", bond, slave);
- return slave;
- }
-
- if (bond->next == slave) { /* is the slave at the head ? */
- if (bond->prev == slave) { /* is the slave alone ? */
- write_lock(&bond->ptrlock);
- bond->current_slave = NULL; /* no slave anymore */
- write_unlock(&bond->ptrlock);
- bond->prev = bond->next = (slave_t *)bond;
- } else { /* not alone */
- bond->next = slave->next;
- slave->next->prev = (slave_t *)bond;
- bond->prev->next = slave->next;
-
- write_lock(&bond->ptrlock);
- if (bond->current_slave == slave) {
- bond->current_slave = slave->next;
- }
- write_unlock(&bond->ptrlock);
- }
- } else {
- slave->prev->next = slave->next;
- if (bond->prev == slave) { /* is this slave the last one ? */
- bond->prev = slave->prev;
- } else {
- slave->next->prev = slave->prev;
- }
-
- write_lock(&bond->ptrlock);
- if (bond->current_slave == slave) {
- bond->current_slave = slave->next;
- }
- write_unlock(&bond->ptrlock);
- }
-
- update_slave_cnt(bond, -1);
-
- return slave;
-}
-
-static void
-bond_attach_slave(struct bonding *bond, struct slave *new_slave)
-{
- /*
- * queue to the end of the slaves list, make the first element its
- * successor, the last one its predecessor, and make it the bond's
- * predecessor.
- *
- * Just to clarify, so future bonding driver hackers don't go through
- * the same confusion stage I did trying to figure this out, the
- * slaves are stored in a double linked circular list, sortof.
- * In the ->next direction, the last slave points to the first slave,
- * bypassing bond; only the slaves are in the ->next direction.
- * In the ->prev direction, however, the first slave points to bond
- * and bond points to the last slave.
- *
- * It looks like a circle with a little bubble hanging off one side
- * in the ->prev direction only.
- *
- * When going through the list once, its best to start at bond->prev
- * and go in the ->prev direction, testing for bond. Doing this
- * in the ->next direction doesn't work. Trust me, I know this now.
- * :) -mts 2002.03.14
- */
- new_slave->prev = bond->prev;
- new_slave->prev->next = new_slave;
- bond->prev = new_slave;
- new_slave->next = bond->next;
-
- update_slave_cnt(bond, 1);
-}
-
-
-/*
- * Less bad way to call ioctl from within the kernel; this needs to be
- * done some other way to get the call out of interrupt context.
- * Needs "ioctl" variable to be supplied by calling context.
- */
-#define IOCTL(dev, arg, cmd) ({ \
- int ret; \
- mm_segment_t fs = get_fs(); \
- set_fs(get_ds()); \
- ret = ioctl(dev, arg, cmd); \
- set_fs(fs); \
- ret; })
-
-/*
- * 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 *dev = slave->dev;
- static int (* ioctl)(struct net_device *, struct ifreq *, int);
- struct ifreq ifr;
- struct ethtool_cmd etool;
-
- ioctl = dev->do_ioctl;
- if (ioctl) {
- etool.cmd = ETHTOOL_GSET;
- ifr.ifr_data = (char*)&etool;
- if (IOCTL(dev, &ifr, SIOCETHTOOL) == 0) {
- slave->speed = etool.speed;
- slave->duplex = etool.duplex;
- } else {
- goto err_out;
- }
- } else {
- goto err_out;
- }
-
- switch (slave->speed) {
- case SPEED_10:
- case SPEED_100:
- case SPEED_1000:
- break;
- default:
- goto err_out;
- }
-
- switch (slave->duplex) {
- case DUPLEX_FULL:
- case DUPLEX_HALF:
- break;
- default:
- goto err_out;
- }
-
- return 0;
-
-err_out:
- //Fake speed and duplex
- slave->speed = SPEED_100;
- slave->duplex = DUPLEX_FULL;
- return -1;
-}
-
-/*
- * 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 net_device *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 (use_carrier) {
- return netif_carrier_ok(dev) ? BMSR_LSTATUS : 0;
- }
-
- ioctl = 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 */
- mii = (struct mii_ioctl_data *)&ifr.ifr_data;
- if (IOCTL(dev, &ifr, SIOCGMIIPHY) == 0) {
- mii->reg_num = MII_BMSR;
- if (IOCTL(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... */
- etool.cmd = ETHTOOL_GLINK;
- ifr.ifr_data = (char*)&etool;
- if (IOCTL(dev, &ifr, SIOCETHTOOL) == 0) {
- if (etool.data == 1) {
- return BMSR_LSTATUS;
- } else {
-#ifdef BONDING_DEBUG
- printk(KERN_INFO
- ":: SIOCETHTOOL shows link down \n");
-#endif
- 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;
-}
-
-static u16 bond_check_mii_link(bonding_t *bond)
-{
- int has_active_interface = 0;
- unsigned long flags;
-
- read_lock_irqsave(&bond->lock, flags);
- read_lock(&bond->ptrlock);
- has_active_interface = (bond->current_slave != NULL);
- read_unlock(&bond->ptrlock);
- read_unlock_irqrestore(&bond->lock, flags);
-
- return (has_active_interface ? BMSR_LSTATUS : 0);
-}
-
-static int bond_open(struct net_device *dev)
-{
- struct timer_list *timer = &((struct bonding *)(dev->priv))->mii_timer;
- struct timer_list *arp_timer = &((struct bonding
*)(dev->priv))->arp_timer;
- MOD_INC_USE_COUNT;
-
- if (miimon > 0) { /* link check interval, in milliseconds. */
- init_timer(timer);
- timer->expires = jiffies + (miimon * HZ / 1000);
- timer->data = (unsigned long)dev;
- timer->function = (void *)&bond_mii_monitor;
- add_timer(timer);
- }
-
- if (arp_interval> 0) { /* arp interval, in milliseconds. */
- init_timer(arp_timer);
- arp_timer->expires = jiffies + (arp_interval * HZ / 1000);
- arp_timer->data = (unsigned long)dev;
- if (bond_mode == BOND_MODE_ACTIVEBACKUP) {
- arp_timer->function = (void *)&activebackup_arp_monitor;
- } else {
- arp_timer->function = (void *)&loadbalance_arp_monitor;
- }
- add_timer(arp_timer);
- }
- return 0;
-}
-
-static int bond_close(struct net_device *master)
-{
- bonding_t *bond = (struct bonding *) master->priv;
- unsigned long flags;
-
- write_lock_irqsave(&bond->lock, flags);
-
- if (miimon > 0) { /* link check interval, in milliseconds. */
- del_timer(&bond->mii_timer);
- }
- if (arp_interval> 0) { /* arp interval, in milliseconds. */
- del_timer(&bond->arp_timer);
- if (arp_target_hw_addr != NULL) {
- kfree(arp_target_hw_addr);
- arp_target_hw_addr = NULL;
- }
- }
-
- /* Release the bonded slaves */
- bond_release_all(master);
- bond_mc_list_destroy (bond);
-
- write_unlock_irqrestore(&bond->lock, flags);
-
- MOD_DEC_USE_COUNT;
- return 0;
-}
-
-/*
- * flush all members of flush->mc_list from device dev->mc_list
- */
-static void bond_mc_list_flush(struct net_device *dev, struct net_device
*flush)
-{
- struct dev_mc_list *dmi;
-
- for (dmi = flush->mc_list; dmi != NULL; dmi = dmi->next)
- dev_mc_delete(dev, dmi->dmi_addr, dmi->dmi_addrlen, 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;
- }
-}
-
-/*
- * Add a Multicast address to every slave in the bonding group
- */
-static void bond_mc_add(bonding_t *bond, void *addr, int alen)
-{
- slave_t *slave;
- switch (multicast_mode) {
- case BOND_MULTICAST_ACTIVE :
- /* write lock already acquired */
- if (bond->current_slave != NULL)
- dev_mc_add(bond->current_slave->dev, addr, alen, 0);
- break;
- case BOND_MULTICAST_ALL :
- for (slave = bond->prev; slave != (slave_t*)bond; slave =
slave->prev)
- dev_mc_add(slave->dev, addr, alen, 0);
- break;
- case BOND_MULTICAST_DISABLED :
- break;
- }
-}
-
-/*
- * Remove a multicast address from every slave in the bonding group
- */
-static void bond_mc_delete(bonding_t *bond, void *addr, int alen)
-{
- slave_t *slave;
- switch (multicast_mode) {
- case BOND_MULTICAST_ACTIVE :
- /* write lock already acquired */
- if (bond->current_slave != NULL)
- dev_mc_delete(bond->current_slave->dev, addr, alen, 0);
- break;
- case BOND_MULTICAST_ALL :
- for (slave = bond->prev; slave != (slave_t*)bond; slave =
slave->prev)
- dev_mc_delete(slave->dev, addr, alen, 0);
- break;
- case BOND_MULTICAST_DISABLED :
- break;
- }
-}
-
-/*
- * Copy all the Multicast addresses from src to the bonding device dst
- */
-static int bond_mc_list_copy (struct dev_mc_list *src, struct bonding *dst,
- int gpf_flag)
-{
- struct dev_mc_list *dmi, *new_dmi;
-
- for (dmi = src; dmi != NULL; dmi = dmi->next) {
- new_dmi = kmalloc(sizeof(struct dev_mc_list), gpf_flag);
-
- if (new_dmi == NULL) {
- return -ENOMEM;
- }
-
- new_dmi->next = dst->mc_list;
- dst->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;
-}
-
-/*
- * Returns 0 if dmi1 and dmi2 are the same, non-0 otherwise
- */
-static inline int 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;
-}
-
-/*
- * Push the promiscuity flag down to all slaves
- */
-static void bond_set_promiscuity(bonding_t *bond, int inc)
-{
- slave_t *slave;
- switch (multicast_mode) {
- case BOND_MULTICAST_ACTIVE :
- /* write lock already acquired */
- if (bond->current_slave != NULL)
- dev_set_promiscuity(bond->current_slave->dev, inc);
- break;
- case BOND_MULTICAST_ALL :
- for (slave = bond->prev; slave != (slave_t*)bond; slave =
slave->prev)
- dev_set_promiscuity(slave->dev, inc);
- break;
- case BOND_MULTICAST_DISABLED :
- break;
- }
-}
-
-/*
- * Push the allmulti flag down to all slaves
- */
-static void bond_set_allmulti(bonding_t *bond, int inc)
-{
- slave_t *slave;
- switch (multicast_mode) {
- case BOND_MULTICAST_ACTIVE :
- /* write lock already acquired */
- if (bond->current_slave != NULL)
- dev_set_allmulti(bond->current_slave->dev, inc);
- break;
- case BOND_MULTICAST_ALL :
- for (slave = bond->prev; slave != (slave_t*)bond; slave =
slave->prev)
- dev_set_allmulti(slave->dev, inc);
- break;
- case BOND_MULTICAST_DISABLED :
- break;
- }
-}
-
-/*
- * 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 != NULL; idmi = idmi->next) {
- if (dmi_same(dmi, idmi)) {
- return idmi;
- }
- }
- return NULL;
-}
-
-static void set_multicast_list(struct net_device *master)
-{
- bonding_t *bond = master->priv;
- struct dev_mc_list *dmi;
- unsigned long flags = 0;
-
- if (multicast_mode == BOND_MULTICAST_DISABLED)
- return;
- /*
- * Lock the private data for the master
- */
- write_lock_irqsave(&bond->lock, flags);
-
- /* set promiscuity flag to slaves */
- if ( (master->flags & IFF_PROMISC) && !(bond->flags & IFF_PROMISC) )
- bond_set_promiscuity(bond, 1);
-
- if ( !(master->flags & IFF_PROMISC) && (bond->flags & IFF_PROMISC) )
- bond_set_promiscuity(bond, -1);
-
- /* set allmulti flag to slaves */
- if ( (master->flags & IFF_ALLMULTI) && !(bond->flags & IFF_ALLMULTI) )
- bond_set_allmulti(bond, 1);
-
- if ( !(master->flags & IFF_ALLMULTI) && (bond->flags & IFF_ALLMULTI) )
- bond_set_allmulti(bond, -1);
-
- bond->flags = master->flags;
-
- /* looking for addresses to add to slaves' mc list */
- for (dmi = master->mc_list; dmi != NULL; dmi = dmi->next) {
- if (bond_mc_list_find_dmi(dmi, bond->mc_list) == NULL)
- bond_mc_add(bond, dmi->dmi_addr, dmi->dmi_addrlen);
- }
-
- /* looking for addresses to delete from slaves' list */
- for (dmi = bond->mc_list; dmi != NULL; dmi = dmi->next) {
- if (bond_mc_list_find_dmi(dmi, master->mc_list) == NULL)
- bond_mc_delete(bond, dmi->dmi_addr, dmi->dmi_addrlen);
- }
-
-
- /* save master's multicast list */
- bond_mc_list_destroy (bond);
- bond_mc_list_copy (master->mc_list, bond, GFP_ATOMIC);
-
- write_unlock_irqrestore(&bond->lock, flags);
-}
-
-/*
- * Update the mc list and multicast-related flags for the new and
- * old active slaves (if any) according to the multicast mode
- */
-static void bond_mc_update(bonding_t *bond, slave_t *new, slave_t *old)
-{
- struct dev_mc_list *dmi;
-
- switch(multicast_mode) {
- case BOND_MULTICAST_ACTIVE :
- if (bond->device->flags & IFF_PROMISC) {
- if (old != NULL && new != old)
- dev_set_promiscuity(old->dev, -1);
- dev_set_promiscuity(new->dev, 1);
- }
- if (bond->device->flags & IFF_ALLMULTI) {
- if (old != NULL && new != old)
- dev_set_allmulti(old->dev, -1);
- dev_set_allmulti(new->dev, 1);
- }
- /* first remove all mc addresses from old slave if any,
- and _then_ add them to new active slave */
- if (old != NULL && new != old) {
- for (dmi = bond->device->mc_list; dmi != NULL; dmi =
dmi->next)
- dev_mc_delete(old->dev, dmi->dmi_addr,
dmi->dmi_addrlen, 0);
- }
- for (dmi = bond->device->mc_list; dmi != NULL; dmi = dmi->next)
- dev_mc_add(new->dev, dmi->dmi_addr, dmi->dmi_addrlen,
0);
- break;
- case BOND_MULTICAST_ALL :
- /* nothing to do: mc list is already up-to-date on all slaves */
- break;
- case BOND_MULTICAST_DISABLED :
- break;
- }
-}
-
-/* enslave device <slave> to bond device <master> */
-static int bond_enslave(struct net_device *master_dev,
- struct net_device *slave_dev)
-{
- bonding_t *bond = NULL;
- slave_t *new_slave = NULL;
- unsigned long flags = 0;
- unsigned long rflags = 0;
- int err = 0;
- struct dev_mc_list *dmi;
- struct in_ifaddr **ifap;
- struct in_ifaddr *ifa;
- int link_reporting;
- struct sockaddr addr;
-
- if (master_dev == NULL || slave_dev == NULL) {
- return -ENODEV;
- }
- bond = (struct bonding *) master_dev->priv;
-
- if (slave_dev->do_ioctl == NULL) {
- printk(KERN_DEBUG
- "Warning : no link monitoring support for %s\n",
- slave_dev->name);
- }
-
- /* This breaks backward comaptibility with old versions
- of ifenslave which open the slave before enalsving */
- /* already up. */
- if ((slave_dev->flags & IFF_UP) == IFF_UP) {
-#ifdef BONDING_DEBUG
- printk(KERN_CRIT "Error, slave_dev is up\n");
-#endif
- return -EBUSY;
- }
-
- /* already enslaved */
- if (master_dev->flags & IFF_SLAVE || slave_dev->flags & IFF_SLAVE) {
-#ifdef BONDING_DEBUG
- printk(KERN_CRIT "Error, Device was already enslaved\n");
-#endif
- return -EBUSY;
- }
-
- /* bond must be initialize by bond_open() before enslaving */
- if ((master_dev->flags & IFF_UP) != IFF_UP) {
-#ifdef BONDING_DEBUG
- printk(KERN_CRIT "Error, master_dev is not up\n");
-#endif
- return -EPERM;
- }
-
- if (slave_dev->set_mac_address == NULL) {
- printk(KERN_CRIT " The slave device you specified does not
support"
- " setting the MAC address.\n Your kernel
likely does not"
- " support slave devices.\n");
- return -EOPNOTSUPP;
- }
-
- if ((new_slave = kmalloc(sizeof(slave_t), GFP_ATOMIC)) == NULL) {
- return -ENOMEM;
- }
- memset(new_slave, 0, sizeof(slave_t));
-
- /* save slave's original flags before calling */
- /* netdev_set_master and dev_open */
- new_slave->original_flags = slave_dev->flags;
-
- /* save slave's original ("permanent") mac address for
- modes that 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);
-
- if (bond->next != (slave_t*)bond) {
- /* 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, master_dev->dev_addr, ETH_ALEN);
- addr.sa_family = slave_dev->type;
- err = slave_dev->set_mac_address(slave_dev, &addr);
- if (err) {
-#ifdef BONDING_DEBUG
- printk(KERN_CRIT "Error %d calling set_mac_address\n",
err);
-#endif
- goto err_free;
- }
- }
-
- /* open the slave since the application closed it */
- err = dev_open(slave_dev);
- if (err) {
-#ifdef BONDING_DEBUG
- printk(KERN_CRIT "Openning slave %s failed\n", slave_dev->name);
-#endif
- goto err_restore_mac;
- }
-
- err = netdev_set_master(slave_dev, master_dev);
-
- if (err) {
-#ifdef BONDING_DEBUG
- printk(KERN_CRIT "Error %d calling netdev_set_master\n", err);
-#endif
- goto err_close;
- }
-
- new_slave->dev = slave_dev;
-
- if (multicast_mode == BOND_MULTICAST_ALL) {
- /* set promiscuity level to new slave */
- if (master_dev->flags & IFF_PROMISC)
- dev_set_promiscuity(slave_dev, 1);
-
- /* set allmulti level to new slave */
- if (master_dev->flags & IFF_ALLMULTI)
- dev_set_allmulti(slave_dev, 1);
-
- /* upload master's mc_list to new slave */
- for (dmi = master_dev->mc_list; dmi != NULL; dmi = dmi->next)
- dev_mc_add (slave_dev, dmi->dmi_addr, dmi->dmi_addrlen,
0);
- }
-
- write_lock_irqsave(&bond->lock, flags);
-
- bond_attach_slave(bond, new_slave);
- new_slave->delay = 0;
- new_slave->link_failure_count = 0;
-
- if (miimon > 0 && !use_carrier) {
- link_reporting = bond_check_dev_link(slave_dev, 1);
-
- if ((link_reporting == -1) && (arp_interval == 0)) {
- /*
- * 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_ERR
- "bond_enslave(): 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
- "bond_enslave: 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 ((miimon <= 0) ||
- (bond_check_dev_link(slave_dev, 0) == BMSR_LSTATUS)) {
-#ifdef BONDING_DEBUG
- printk(KERN_CRIT "Initial state of slave_dev is
BOND_LINK_UP\n");
-#endif
- new_slave->link = BOND_LINK_UP;
- new_slave->jiffies = jiffies;
- }
- else {
-#ifdef BONDING_DEBUG
- printk(KERN_CRIT "Initial state of slave_dev is
BOND_LINK_DOWN\n");
-#endif
- new_slave->link = BOND_LINK_DOWN;
- }
-
- if (bond_update_speed_duplex(new_slave) && (new_slave->link ==
BOND_LINK_UP) ) {
- printk(KERN_WARNING
- "bond_enslave(): failed to get speed/duplex from %s, "
- "speed forced to 100Mbps, duplex forced to Full.\n",
- new_slave->dev->name);
- }
-
- /* 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 current_slave always point to the last
- * usable interface, we just have to verify this interface's flag.
- */
- if (bond_mode == BOND_MODE_ACTIVEBACKUP) {
- if (((bond->current_slave == NULL)
- || (bond->current_slave->dev->flags & IFF_NOARP))
- && (new_slave->link == BOND_LINK_UP)) {
-#ifdef BONDING_DEBUG
- printk(KERN_CRIT "This is the first active slave\n");
-#endif
- /* first slave or no active slave yet, and this link
- is OK, so make this interface the active one */
- bond->current_slave = new_slave;
- bond_set_slave_active_flags(new_slave);
- bond_mc_update(bond, new_slave, NULL);
- }
- else {
-#ifdef BONDING_DEBUG
- printk(KERN_CRIT "This is just a backup slave\n");
-#endif
- bond_set_slave_inactive_flags(new_slave);
- }
- read_lock_irqsave(&(((struct in_device
*)slave_dev->ip_ptr)->lock), rflags);
- ifap= &(((struct in_device *)slave_dev->ip_ptr)->ifa_list);
- ifa = *ifap;
- my_ip = ifa->ifa_address;
- read_unlock_irqrestore(&(((struct in_device
*)slave_dev->ip_ptr)->lock), rflags);
-
- /* if there is a primary slave, remember it */
- if (primary != NULL)
- if( strcmp(primary, new_slave->dev->name) == 0)
- bond->primary_slave = new_slave;
- } else {
-#ifdef BONDING_DEBUG
- printk(KERN_CRIT "This slave is always active in trunk mode\n");
-#endif
- /* always active in trunk mode */
- new_slave->state = BOND_STATE_ACTIVE;
- if (bond->current_slave == NULL)
- bond->current_slave = new_slave;
- }
-
- write_unlock_irqrestore(&bond->lock, flags);
-
- printk (KERN_INFO "%s: enslaving %s as a%s interface with a%s link.\n",
- master_dev->name, slave_dev->name,
- new_slave->state == BOND_STATE_ACTIVE ? "n active" : " backup",
- new_slave->link == BOND_LINK_UP ? "n up" : " down");
-
- //enslave is successfull
- return 0;
-
-// Undo stages on error
-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;
- slave_dev->set_mac_address(slave_dev, &addr);
-
-err_free:
- kfree(new_slave);
- return err;
-}
-
-/*
- * 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_change_active(struct net_device *master_dev, struct net_device
*slave_dev)
-{
- bonding_t *bond;
- slave_t *slave;
- slave_t *oldactive = NULL;
- slave_t *newactive = NULL;
- unsigned long flags;
- int ret = 0;
-
- if (master_dev == NULL || slave_dev == NULL) {
- return -ENODEV;
- }
-
- bond = (struct bonding *) master_dev->priv;
- write_lock_irqsave(&bond->lock, flags);
- slave = (slave_t *)bond;
- oldactive = bond->current_slave;
-
- while ((slave = slave->prev) != (slave_t *)bond) {
- if(slave_dev == slave->dev) {
- newactive = slave;
- break;
- }
- }
-
- if ((newactive != NULL)&&
- (oldactive != NULL)&&
- (newactive != oldactive)&&
- (newactive->link == BOND_LINK_UP)&&
- IS_UP(newactive->dev)) {
- bond_set_slave_inactive_flags(oldactive);
- bond_set_slave_active_flags(newactive);
- bond_mc_update(bond, newactive, oldactive);
- bond->current_slave = newactive;
- printk("%s : activate %s(old : %s)\n",
- master_dev->name, newactive->dev->name,
- oldactive->dev->name);
- }
- else {
- ret = -EINVAL;
- }
- write_unlock_irqrestore(&bond->lock, flags);
- return ret;
-}
-
-/* Choose a new valid interface from the pool, set it active
- * and make it the current slave. If no valid interface is
- * found, the oldest slave in BACK state is choosen and
- * activated. If none is found, it's considered as no
- * interfaces left so the current slave is set to NULL.
- * The result is a pointer to the current slave.
- *
- * Since this function sends messages tails through printk, the caller
- * must have started something like `printk(KERN_INFO "xxxx ");'.
- *
- * Warning: must put locks around the call to this function if needed.
- */
-slave_t *change_active_interface(bonding_t *bond)
-{
- slave_t *newslave, *oldslave;
- slave_t *bestslave = NULL;
- int mintime;
-
- read_lock(&bond->ptrlock);
- newslave = oldslave = bond->current_slave;
- read_unlock(&bond->ptrlock);
-
- if (newslave == NULL) { /* there were no active slaves left */
- if (bond->next != (slave_t *)bond) { /* found one slave */
- write_lock(&bond->ptrlock);
- newslave = bond->current_slave = bond->next;
- write_unlock(&bond->ptrlock);
- } else {
-
- printk (" but could not find any %s interface.\n",
- (bond_mode == BOND_MODE_ACTIVEBACKUP) ?
"backup":"other");
- write_lock(&bond->ptrlock);
- bond->current_slave = (slave_t *)NULL;
- write_unlock(&bond->ptrlock);
- return NULL; /* still no slave, return NULL */
- }
- } else if (bond_mode == BOND_MODE_ACTIVEBACKUP) {
- /* make sure oldslave doesn't send arps - this could
- * cause a ping-pong effect between interfaces since they
- * would be able to tx arps - in active backup only one
- * slave should be able to tx arps, and that should be
- * the current_slave; the only exception is when all
- * slaves have gone down, then only one non-current slave can
- * send arps at a time; clearing oldslaves' mc list is handled
- * later in this function.
- */
- bond_set_slave_inactive_flags(oldslave);
- }
-
- mintime = updelay;
-
- /* first try the primary link; if arping, a link must tx/rx traffic
- * before it can be considered the current_slave - also, we would skip
- * slaves between the current_slave and primary_slave that may be up
- * and able to arp
- */
- if ((bond->primary_slave != NULL) && (arp_interval == 0)) {
- if (IS_UP(bond->primary_slave->dev))
- newslave = bond->primary_slave;
- }
-
- do {
- if (IS_UP(newslave->dev)) {
- if (newslave->link == BOND_LINK_UP) {
- /* this one is immediately usable */
- if (bond_mode == BOND_MODE_ACTIVEBACKUP) {
- bond_set_slave_active_flags(newslave);
- bond_mc_update(bond, newslave,
oldslave);
- printk (" and making interface %s the
active one.\n",
- newslave->dev->name);
- }
- else {
- printk (" and setting pointer to
interface %s.\n",
- newslave->dev->name);
- }
-
- write_lock(&bond->ptrlock);
- bond->current_slave = newslave;
- write_unlock(&bond->ptrlock);
- return newslave;
- }
- else if (newslave->link == BOND_LINK_BACK) {
- /* link up, but waiting for stabilization */
- if (newslave->delay < mintime) {
- mintime = newslave->delay;
- bestslave = newslave;
- }
- }
- }
- } while ((newslave = newslave->next) != oldslave);
-
- /* no usable backup found, we'll see if we at least got a link that was
- coming back for a long time, and could possibly already be usable.
- */
-
- if (bestslave != NULL) {
- /* early take-over. */
- printk (" and making interface %s the active one %d ms
earlier.\n",
- bestslave->dev->name,
- (updelay - bestslave->delay)*miimon);
-
- bestslave->delay = 0;
- bestslave->link = BOND_LINK_UP;
- bestslave->jiffies = jiffies;
- bond_set_slave_active_flags(bestslave);
- bond_mc_update(bond, bestslave, oldslave);
- write_lock(&bond->ptrlock);
- bond->current_slave = bestslave;
- write_unlock(&bond->ptrlock);
- return bestslave;
- }
-
- if ((bond_mode == BOND_MODE_ACTIVEBACKUP) &&
- (multicast_mode == BOND_MULTICAST_ACTIVE) &&
- (oldslave != NULL)) {
- /* flush bonds (master's) mc_list from oldslave since it wasn't
- * updated (and deleted) above
- */
- bond_mc_list_flush(oldslave->dev, bond->device);
- if (bond->device->flags & IFF_PROMISC) {
- dev_set_promiscuity(oldslave->dev, -1);
- }
- if (bond->device->flags & IFF_ALLMULTI) {
- dev_set_allmulti(oldslave->dev, -1);
- }
- }
-
- printk (" but could not find any %s interface.\n",
- (bond_mode == BOND_MODE_ACTIVEBACKUP) ? "backup":"other");
-
- /* absolutely nothing found. let's return NULL */
- write_lock(&bond->ptrlock);
- bond->current_slave = (slave_t *)NULL;
- write_unlock(&bond->ptrlock);
- return NULL;
-}
-
-/*
- * Try to release the slave device <slave> from the bond device <master>
- * It is legal to access current_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 *master, struct net_device *slave)
-{
- bonding_t *bond;
- slave_t *our_slave, *old_current;
- unsigned long flags;
- struct sockaddr addr;
-
- if (master == NULL || slave == NULL) {
- return -ENODEV;
- }
-
- bond = (struct bonding *) master->priv;
-
- /* master already enslaved, or slave not enslaved,
- or no slave for this master */
- if ((master->flags & IFF_SLAVE) || !(slave->flags & IFF_SLAVE)) {
- printk (KERN_DEBUG "%s: cannot release %s.\n", master->name,
slave->name);
- return -EINVAL;
- }
-
- write_lock_irqsave(&bond->lock, flags);
- bond->current_arp_slave = NULL;
- our_slave = (slave_t *)bond;
- old_current = bond->current_slave;
- while ((our_slave = our_slave->prev) != (slave_t *)bond) {
- if (our_slave->dev == slave) {
- bond_detach_slave(bond, our_slave);
-
- printk (KERN_INFO "%s: releasing %s interface %s",
- master->name,
- (our_slave->state == BOND_STATE_ACTIVE) ?
"active" : "backup",
- slave->name);
-
- if (our_slave == old_current) {
- /* find a new interface and be verbose */
- change_active_interface(bond);
- } else {
- printk(".\n");
- }
-
- if (bond->current_slave == NULL) {
- printk(KERN_INFO
- "%s: now running without any active
interface !\n",
- master->name);
- }
-
- if (bond->primary_slave == our_slave) {
- bond->primary_slave = NULL;
- }
-
- break;
- }
-
- }
- write_unlock_irqrestore(&bond->lock, flags);
-
- if (our_slave == (slave_t *)bond) {
- /* if we get here, it's because the device was not found */
- printk (KERN_INFO "%s: %s not enslaved\n", master->name,
slave->name);
- return -EINVAL;
- }
-
- /* undo settings and restore original values */
-
- if (multicast_mode == BOND_MULTICAST_ALL) {
- /* flush master's mc_list from slave */
- bond_mc_list_flush (slave, master);
-
- /* unset promiscuity level from slave */
- if (master->flags & IFF_PROMISC)
- dev_set_promiscuity(slave, -1);
-
- /* unset allmulti level from slave */
- if (master->flags & IFF_ALLMULTI)
- dev_set_allmulti(slave, -1);
- }
-
- netdev_set_master(slave, NULL);
-
- /* close slave before restoring its mac address */
- dev_close(slave);
-
- /* restore original ("permanent") mac address*/
- memcpy(addr.sa_data, our_slave->perm_hwaddr, ETH_ALEN);
- addr.sa_family = slave->type;
- slave->set_mac_address(slave, &addr);
-
- /* restore the original state of the IFF_NOARP flag that might have */
- /* been set by bond_set_slave_inactive_flags() */
- if ((our_slave->original_flags & IFF_NOARP) == 0) {
- slave->flags &= ~IFF_NOARP;
- }
-
- kfree(our_slave);
-
- /* 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 */
- if (bond->next == (slave_t*)bond) {
- memset(master->dev_addr, 0, master->addr_len);
- }
-
- return 0; /* deletion OK */
-}
-
-/*
- * This function releases all slaves.
- * Warning: must put write-locks around the call to this function.
- */
-static int bond_release_all(struct net_device *master)
-{
- bonding_t *bond;
- slave_t *our_slave;
- struct net_device *slave_dev;
- struct sockaddr addr;
-
- if (master == NULL) {
- return -ENODEV;
- }
-
- if (master->flags & IFF_SLAVE) {
- return -EINVAL;
- }
-
- bond = (struct bonding *) master->priv;
- bond->current_arp_slave = NULL;
- bond->current_slave = NULL;
- bond->primary_slave = NULL;
-
- while ((our_slave = bond->prev) != (slave_t *)bond) {
- slave_dev = our_slave->dev;
- bond_detach_slave(bond, our_slave);
-
- if (multicast_mode == BOND_MULTICAST_ALL
- || (multicast_mode == BOND_MULTICAST_ACTIVE
- && bond->current_slave == our_slave)) {
-
- /* flush master's mc_list from slave */
- bond_mc_list_flush (slave_dev, master);
-
- /* unset promiscuity level from slave */
- if (master->flags & IFF_PROMISC)
- dev_set_promiscuity(slave_dev, -1);
-
- /* unset allmulti level from slave */
- if (master->flags & IFF_ALLMULTI)
- dev_set_allmulti(slave_dev, -1);
- }
-
- /* Can be safely called from inside the bond lock
- since traffic and timers have already stopped
- */
- netdev_set_master(slave_dev, NULL);
-
- /* close slave before restoring its mac address */
- dev_close(slave_dev);
-
- /* restore original ("permanent") mac address*/
- memcpy(addr.sa_data, our_slave->perm_hwaddr, ETH_ALEN);
- addr.sa_family = slave_dev->type;
- slave_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 ((our_slave->original_flags & IFF_NOARP) == 0) {
- slave_dev->flags &= ~IFF_NOARP;
- }
-
- kfree(our_slave);
- }
-
- /* zero the mac address of the master so it will be
- set by the application to the mac address of the
- first slave */
- memset(master->dev_addr, 0, master->addr_len);
-
- printk (KERN_INFO "%s: released all slaves\n", master->name);
-
- return 0;
-}
-
-/* this function is called regularly to monitor each slave's link. */
-static void bond_mii_monitor(struct net_device *master)
-{
- bonding_t *bond = (struct bonding *) master->priv;
- slave_t *slave, *bestslave, *oldcurrent;
- unsigned long flags;
- int slave_died = 0;
-
- read_lock_irqsave(&bond->lock, flags);
-
- /* 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.
- */
-
- bestslave = NULL;
- slave = (slave_t *)bond;
-
- read_lock(&bond->ptrlock);
- oldcurrent = bond->current_slave;
- read_unlock(&bond->ptrlock);
-
- while ((slave = slave->prev) != (slave_t *)bond) {
- /* use updelay+1 to match an UP slave even when updelay is 0 */
- int mindelay = updelay + 1;
- struct net_device *dev = slave->dev;
- int link_state;
-
- link_state = bond_check_dev_link(dev, 0);
-
- switch (slave->link) {
- case BOND_LINK_UP: /* the link was up */
- if (link_state == BMSR_LSTATUS) {
- /* link stays up, tell that this one
- is immediately available */
- if (IS_UP(dev) && (mindelay > -2)) {
- /* -2 is the best case :
- this slave was already up */
- mindelay = -2;
- bestslave = slave;
- }
- break;
- }
- else { /* link going down */
- slave->link = BOND_LINK_FAIL;
- slave->delay = downdelay;
- if (slave->link_failure_count < UINT_MAX) {
- slave->link_failure_count++;
- }
- if (downdelay > 0) {
- printk (KERN_INFO
- "%s: link status down for
%sinterface "
- "%s, disabling it in %d ms.\n",
- master->name,
- IS_UP(dev)
- ? ((bond_mode ==
BOND_MODE_ACTIVEBACKUP)
- ? ((slave == oldcurrent)
- ? "active " : "backup ")
- : "")
- : "idle ",
- dev->name,
- downdelay * 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_mode ==
BOND_MODE_ACTIVEBACKUP) {
-
bond_set_slave_inactive_flags(slave);
- }
- printk(KERN_INFO
- "%s: link status definitely
down "
- "for interface %s, disabling
it",
- master->name,
- dev->name);
-
- read_lock(&bond->ptrlock);
- if (slave == bond->current_slave) {
- read_unlock(&bond->ptrlock);
- /* find a new interface and be
verbose */
- change_active_interface(bond);
- } else {
- read_unlock(&bond->ptrlock);
- printk(".\n");
- }
- slave_died = 1;
- } else {
- slave->delay--;
- }
- } else {
- /* link up again */
- slave->link = BOND_LINK_UP;
- slave->jiffies = jiffies;
- printk(KERN_INFO
- "%s: link status up again after %d ms "
- "for interface %s.\n",
- master->name,
- (downdelay - slave->delay) * miimon,
- dev->name);
-
- if (IS_UP(dev) && (mindelay > -1)) {
- /* -1 is a good case : this slave went
- down only for a short time */
- mindelay = -1;
- bestslave = slave;
- }
- }
- 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 = updelay;
-
- if (updelay > 0) {
- /* if updelay == 0, no need to
- advertise about a 0 ms delay */
- printk (KERN_INFO
- "%s: link status up for
interface"
- " %s, enabling it in %d ms.\n",
- master->name,
- dev->name,
- updelay * 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
- "%s: link status down again after %d ms
"
- "for interface %s.\n",
- master->name,
- (updelay - slave->delay) * miimon,
- 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_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
- "%s: link status definitely up "
- "for interface %s.\n",
- master->name,
- dev->name);
-
- if ( (bond->primary_slave != NULL)
- && (slave == bond->primary_slave) )
- change_active_interface(bond);
- }
- else
- slave->delay--;
-
- /* we'll also look for the mostly eligible
slave */
- if (bond->primary_slave == NULL) {
- if (IS_UP(dev) && (slave->delay <
mindelay)) {
- mindelay = slave->delay;
- bestslave = slave;
- }
- } else if ( (IS_UP(bond->primary_slave->dev))
||
- ( (!IS_UP(bond->primary_slave->dev))
&&
- (IS_UP(dev) && (slave->delay <
mindelay)) ) ) {
- mindelay = slave->delay;
- bestslave = slave;
- }
- }
- break;
- } /* end of switch */
-
- bond_update_speed_duplex(slave);
-
- } /* end of while */
-
- /*
- * if there's no active interface and we discovered that one
- * of the slaves could be activated earlier, so we do it.
- */
- read_lock(&bond->ptrlock);
- oldcurrent = bond->current_slave;
- read_unlock(&bond->ptrlock);
-
- /* no active interface at the moment or need to bring up the primary */
- if (oldcurrent == NULL) { /* no active interface at the moment */
- if (bestslave != NULL) { /* last chance to find one ? */
- if (bestslave->link == BOND_LINK_UP) {
- printk (KERN_INFO
- "%s: making interface %s the new active
one.\n",
- master->name, bestslave->dev->name);
- } else {
- printk (KERN_INFO
- "%s: making interface %s the new "
- "active one %d ms earlier.\n",
- master->name, bestslave->dev->name,
- (updelay - bestslave->delay) * miimon);
-
- bestslave->delay = 0;
- bestslave->link = BOND_LINK_UP;
- bestslave->jiffies = jiffies;
- }
-
- if (bond_mode == BOND_MODE_ACTIVEBACKUP) {
- bond_set_slave_active_flags(bestslave);
- bond_mc_update(bond, bestslave, NULL);
- } else {
- bestslave->state = BOND_STATE_ACTIVE;
- }
- write_lock(&bond->ptrlock);
- bond->current_slave = bestslave;
- write_unlock(&bond->ptrlock);
- } else if (slave_died) {
- /* print this message only once a slave has just died */
- printk(KERN_INFO
- "%s: now running without any active interface
!\n",
- master->name);
- }
- }
-
- read_unlock_irqrestore(&bond->lock, flags);
- /* re-arm the timer */
- mod_timer(&bond->mii_timer, jiffies + (miimon * HZ / 1000));
-}
-
-/*
- * 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 loadbalance_arp_monitor(struct net_device *master)
-{
- bonding_t *bond;
- unsigned long flags;
- slave_t *slave;
- int the_delta_in_ticks = arp_interval * HZ / 1000;
- int next_timer = jiffies + (arp_interval * HZ / 1000);
-
- bond = (struct bonding *) master->priv;
- if (master->priv == NULL) {
- mod_timer(&bond->arp_timer, next_timer);
- return;
- }
-
- read_lock_irqsave(&bond->lock, flags);
-
- /* TODO: investigate why rtnl_shlock_nowait and rtnl_exlock_nowait
- * are called below and add comment why they are required...
- */
- if ((!IS_UP(master)) || rtnl_shlock_nowait()) {
- mod_timer(&bond->arp_timer, next_timer);
- read_unlock_irqrestore(&bond->lock, flags);
- return;
- }
-
- if (rtnl_exlock_nowait()) {
- rtnl_shunlock();
- mod_timer(&bond->arp_timer, next_timer);
- read_unlock_irqrestore(&bond->lock, flags);
- return;
- }
-
- /* see if any of the previous devices are up now (i.e. they have
- * xmt and rcv traffic). the current_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
- */
- slave = (slave_t *)bond;
- while ((slave = slave->prev) != (slave_t *)bond) {
-
- if (slave->link != BOND_LINK_UP) {
-
- if (((jiffies - slave->dev->trans_start) <=
- the_delta_in_ticks) &&
- ((jiffies - slave->dev->last_rx) <=
- the_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
- * current_slave being null after enslaving
- * is closed.
- */
- read_lock(&bond->ptrlock);
- if (bond->current_slave == NULL) {
- read_unlock(&bond->ptrlock);
- printk(KERN_INFO
- "%s: link status definitely up "
- "for interface %s, ",
- master->name,
- slave->dev->name);
- change_active_interface(bond);
- } else {
- read_unlock(&bond->ptrlock);
- printk(KERN_INFO
- "%s: interface %s is now up\n",
- master->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*the_delta_in_ticks)) ||
- (((jiffies - slave->dev->last_rx) >=
- (2*the_delta_in_ticks)) && my_ip !=0)) {
- slave->link = BOND_LINK_DOWN;
- slave->state = BOND_STATE_BACKUP;
- if (slave->link_failure_count < UINT_MAX) {
- slave->link_failure_count++;
- }
- printk(KERN_INFO
- "%s: interface %s is now down.\n",
- master->name,
- slave->dev->name);
-
- read_lock(&bond->ptrlock);
- if (slave == bond->current_slave) {
- read_unlock(&bond->ptrlock);
- change_active_interface(bond);
- } else {
- read_unlock(&bond->ptrlock);
- }
- }
- }
-
- /* 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)) {
- arp_send_all(slave);
- }
- }
-
- rtnl_exunlock();
- rtnl_shunlock();
- read_unlock_irqrestore(&bond->lock, flags);
-
- /* re-arm the timer */
- mod_timer(&bond->arp_timer, next_timer);
-}
-
-/*
- * 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 activebackup_arp_monitor(struct net_device *master)
-{
- bonding_t *bond;
- unsigned long flags;
- slave_t *slave;
- int the_delta_in_ticks = arp_interval * HZ / 1000;
- int next_timer = jiffies + (arp_interval * HZ / 1000);
-
- bond = (struct bonding *) master->priv;
- if (master->priv == NULL) {
- mod_timer(&bond->arp_timer, next_timer);
- return;
- }
-
- read_lock_irqsave(&bond->lock, flags);
-
- if (!IS_UP(master)) {
- mod_timer(&bond->arp_timer, next_timer);
- read_unlock_irqrestore(&bond->lock, flags);
- return;
- }
-
- /* 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
- */
- slave = (slave_t *)bond;
- while ((slave = slave->prev) != (slave_t *)bond) {
-
- if (slave->link != BOND_LINK_UP) {
- if ((jiffies - slave->dev->last_rx) <=
- the_delta_in_ticks) {
-
- slave->link = BOND_LINK_UP;
- write_lock(&bond->ptrlock);
- if ((bond->current_slave == NULL) &&
- ((jiffies - slave->dev->trans_start) <=
- the_delta_in_ticks)) {
- bond->current_slave = slave;
- bond_set_slave_active_flags(slave);
- bond_mc_update(bond, slave, NULL);
- bond->current_arp_slave = NULL;
- } else if (bond->current_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->current_slave) {
- printk(KERN_INFO
- "%s: %s is up and now the "
- "active interface\n",
- master->name,
- slave->dev->name);
- } else {
- printk(KERN_INFO
- "%s: backup interface %s is "
- "now up\n",
- master->name,
- slave->dev->name);
- }
-
- write_unlock(&bond->ptrlock);
- }
- } else {
- read_lock(&bond->ptrlock);
- if ((slave != bond->current_slave) &&
- (bond->current_arp_slave == NULL) &&
- (((jiffies - slave->dev->last_rx) >=
- 3*the_delta_in_ticks) && (my_ip != 0))) {
- /* 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 current_slave went down and we are
- * searching for a new one; under this
- * condition we only take the current_slave
- * down - this gives each slave a chance to
- * tx/rx traffic before being taken out
- */
- read_unlock(&bond->ptrlock);
- 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
- "%s: backup interface %s is now down\n",
- master->name,
- slave->dev->name);
- } else {
- read_unlock(&bond->ptrlock);
- }
- }
- }
-
- read_lock(&bond->ptrlock);
- slave = bond->current_slave;
- read_unlock(&bond->ptrlock);
-
- if (slave != NULL) {
-
- /* 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 current_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 current_slave
- */
- if ((((jiffies - slave->dev->trans_start) >=
- (2*the_delta_in_ticks)) ||
- (((jiffies - slave->dev->last_rx) >=
- (2*the_delta_in_ticks)) && (my_ip != 0))) &&
- ((jiffies - slave->jiffies) >= 2*the_delta_in_ticks)) {
-
- slave->link = BOND_LINK_DOWN;
- if (slave->link_failure_count < UINT_MAX) {
- slave->link_failure_count++;
- }
- printk(KERN_INFO "%s: link status down for "
- "active interface %s, disabling it",
- master->name,
- slave->dev->name);
- slave = change_active_interface(bond);
- bond->current_arp_slave = slave;
- if (slave != NULL) {
- slave->jiffies = jiffies;
- }
-
- } else if ((bond->primary_slave != NULL) &&
- (bond->primary_slave != slave) &&
- (bond->primary_slave->link == BOND_LINK_UP)) {
- /* at this point, slave is the current_slave */
- printk(KERN_INFO
- "%s: changing from interface %s to primary "
- "interface %s\n",
- master->name,
- slave->dev->name,
- bond->primary_slave->dev->name);
-
- /* primary is up so switch to it */
- bond_set_slave_inactive_flags(slave);
- bond_mc_update(bond, bond->primary_slave, slave);
- write_lock(&bond->ptrlock);
- bond->current_slave = bond->primary_slave;
- write_unlock(&bond->ptrlock);
- slave = bond->primary_slave;
- bond_set_slave_active_flags(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 != NULL) &&
- (((jiffies - slave->dev->last_rx) >= the_delta_in_ticks) &&
- (my_ip != 0))) {
- arp_send_all(slave);
- }
- }
-
- /* if we don't have a current_slave, search for the next available
- * backup slave from the current_arp_slave and make it the candidate
- * for becoming the current_slave
- */
- if (slave == NULL) {
-
- if ((bond->current_arp_slave == NULL) ||
- (bond->current_arp_slave == (slave_t *)bond)) {
- bond->current_arp_slave = bond->prev;
- }
-
- if (bond->current_arp_slave != (slave_t *)bond) {
- bond_set_slave_inactive_flags(bond->current_arp_slave);
- slave = bond->current_arp_slave->next;
-
- /* search for next candidate */
- do {
- if (IS_UP(slave->dev)) {
- slave->link = BOND_LINK_BACK;
- bond_set_slave_active_flags(slave);
- arp_send_all(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
- * change_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
- "%s: backup interface "
- "%s is now down.\n",
- master->name,
- slave->dev->name);
- }
- } while ((slave = slave->next) !=
- bond->current_arp_slave->next);
- }
- }
-
- mod_timer(&bond->arp_timer, next_timer);
- read_unlock_irqrestore(&bond->lock, flags);
-}
-
-typedef uint32_t in_addr_t;
-
-int
-my_inet_aton(char *cp, unsigned long *the_addr) {
- static const in_addr_t max[4] = { 0xffffffff, 0xffffff, 0xffff, 0xff };
- in_addr_t val;
- char c;
- union iaddr {
- uint8_t bytes[4];
- uint32_t word;
- } res;
- uint8_t *pp = res.bytes;
- int digit,base;
-
- res.word = 0;
-
- c = *cp;
- for (;;) {
- /*
- * Collect number up to ``.''.
- * Values are specified as for C:
- * 0x=hex, 0=octal, isdigit=decimal.
- */
- if (!isdigit(c)) goto ret_0;
- val = 0; base = 10; digit = 0;
- for (;;) {
- if (isdigit(c)) {
- val = (val * base) + (c - '0');
- c = *++cp;
- digit = 1;
- } else {
- break;
- }
- }
- if (c == '.') {
- /*
- * Internet format:
- * a.b.c.d
- * a.b.c (with c treated as 16 bits)
- * a.b (with b treated as 24 bits)
- */
- if (pp > res.bytes + 2 || val > 0xff) {
- goto ret_0;
- }
- *pp++ = val;
- c = *++cp;
- } else
- break;
- }
- /*
- * Check for trailing characters.
- */
- if (c != '\0' && (!isascii(c) || !isspace(c))) {
- goto ret_0;
- }
- /*
- * Did we get a valid digit?
- */
- if (!digit) {
- goto ret_0;
- }
-
- /* Check whether the last part is in its limits depending on
- the number of parts in total. */
- if (val > max[pp - res.bytes]) {
- goto ret_0;
- }
-
- if (the_addr != NULL) {
- *the_addr = res.word | htonl (val);
- }
-
- return (1);
-
-ret_0:
- return (0);
-}
-
-static int bond_sethwaddr(struct net_device *master, struct net_device *slave)
-{
-#ifdef BONDING_DEBUG
- printk(KERN_CRIT "bond_sethwaddr: master=%x\n", (unsigned int)master);
- printk(KERN_CRIT "bond_sethwaddr: slave=%x\n", (unsigned int)slave);
- printk(KERN_CRIT "bond_sethwaddr: slave->addr_len=%d\n",
slave->addr_len);
-#endif
- memcpy(master->dev_addr, slave->dev_addr, slave->addr_len);
- return 0;
-}
-
-static int bond_info_query(struct net_device *master, struct ifbond *info)
-{
- bonding_t *bond = (struct bonding *) master->priv;
- slave_t *slave;
- unsigned long flags;
-
- info->bond_mode = bond_mode;
- info->num_slaves = 0;
- info->miimon = miimon;
-
- read_lock_irqsave(&bond->lock, flags);
- for (slave = bond->prev; slave != (slave_t *)bond; slave = slave->prev)
{
- info->num_slaves++;
- }
- read_unlock_irqrestore(&bond->lock, flags);
-
- return 0;
-}
-
-static int bond_slave_info_query(struct net_device *master,
- struct ifslave *info)
-{
- bonding_t *bond = (struct bonding *) master->priv;
- slave_t *slave;
- int cur_ndx = 0;
- unsigned long flags;
-
- if (info->slave_id < 0) {
- return -ENODEV;
- }
-
- read_lock_irqsave(&bond->lock, flags);
- for (slave = bond->prev;
- slave != (slave_t *)bond && cur_ndx < info->slave_id;
- slave = slave->prev) {
- cur_ndx++;
- }
- read_unlock_irqrestore(&bond->lock, flags);
-
- if (slave != (slave_t *)bond) {
- 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;
-}
-
-static int bond_ioctl(struct net_device *master_dev, struct ifreq *ifr, int
cmd)
-{
- struct net_device *slave_dev = NULL;
- struct ifbond *u_binfo = NULL, k_binfo;
- struct ifslave *u_sinfo = NULL, k_sinfo;
- struct mii_ioctl_data *mii = NULL;
- int ret = 0;
-
-#ifdef BONDING_DEBUG
- printk(KERN_INFO "bond_ioctl: master=%s, cmd=%d\n",
- master_dev->name, cmd);
-#endif
-
- switch (cmd) {
- case SIOCGMIIPHY:
- mii = (struct mii_ioctl_data *)&ifr->ifr_data;
- if (mii == NULL) {
- 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 = (struct mii_ioctl_data *)&ifr->ifr_data;
- if (mii == NULL) {
- return -EINVAL;
- }
- if (mii->reg_num == 1) {
- mii->val_out = bond_check_mii_link(
- (struct bonding *)master_dev->priv);
- }
- return 0;
- case BOND_INFO_QUERY_OLD:
- case SIOCBONDINFOQUERY:
- u_binfo = (struct ifbond *)ifr->ifr_data;
- if (copy_from_user(&k_binfo, u_binfo, sizeof(ifbond))) {
- return -EFAULT;
- }
- ret = bond_info_query(master_dev, &k_binfo);
- if (ret == 0) {
- if (copy_to_user(u_binfo, &k_binfo, sizeof(ifbond))) {
- return -EFAULT;
- }
- }
- return ret;
- case BOND_SLAVE_INFO_QUERY_OLD:
- case SIOCBONDSLAVEINFOQUERY:
- u_sinfo = (struct ifslave *)ifr->ifr_data;
- if (copy_from_user(&k_sinfo, u_sinfo, sizeof(ifslave))) {
- return -EFAULT;
- }
- ret = bond_slave_info_query(master_dev, &k_sinfo);
- if (ret == 0) {
- if (copy_to_user(u_sinfo, &k_sinfo, sizeof(ifslave))) {
- return -EFAULT;
- }
- }
- return ret;
- }
-
- if (!capable(CAP_NET_ADMIN)) {
- return -EPERM;
- }
-
- slave_dev = dev_get_by_name(ifr->ifr_slave);
-
-#ifdef BONDING_DEBUG
- printk(KERN_INFO "slave_dev=%x: \n", (unsigned int)slave_dev);
- printk(KERN_INFO "slave_dev->name=%s: \n", slave_dev->name);
-#endif
-
- if (slave_dev == NULL) {
- ret = -ENODEV;
- } else {
- switch (cmd) {
- case BOND_ENSLAVE_OLD:
- case SIOCBONDENSLAVE:
- ret = bond_enslave(master_dev, slave_dev);
- break;
- case BOND_RELEASE_OLD:
- case SIOCBONDRELEASE:
- ret = bond_release(master_dev, slave_dev);
- break;
- case BOND_SETHWADDR_OLD:
- case SIOCBONDSETHWADDR:
- ret = bond_sethwaddr(master_dev, slave_dev);
- break;
- case BOND_CHANGE_ACTIVE_OLD:
- case SIOCBONDCHANGEACTIVE:
- if (bond_mode == BOND_MODE_ACTIVEBACKUP) {
- ret = bond_change_active(master_dev, slave_dev);
- }
- else {
- ret = -EINVAL;
- }
- break;
- default:
- ret = -EOPNOTSUPP;
- }
- dev_put(slave_dev);
- }
- return ret;
-}
-
-#ifdef CONFIG_NET_FASTROUTE
-static int bond_accept_fastpath(struct net_device *dev, struct dst_entry *dst)
-{
- return -1;
-}
-#endif
-
-/*
- * in broadcast mode, we send everything to all usable interfaces.
- */
-static int bond_xmit_broadcast(struct sk_buff *skb, struct net_device *dev)
-{
- slave_t *slave, *start_at;
- struct bonding *bond = (struct bonding *) dev->priv;
- unsigned long flags;
- struct net_device *device_we_should_send_to = 0;
-
- if (!IS_UP(dev)) { /* bond down */
- dev_kfree_skb(skb);
- return 0;
- }
-
- read_lock_irqsave(&bond->lock, flags);
-
- read_lock(&bond->ptrlock);
- slave = start_at = bond->current_slave;
- read_unlock(&bond->ptrlock);
-
- if (slave == NULL) { /* we're at the root, get the first slave */
- /* no suitable interface, frame not sent */
- read_unlock_irqrestore(&bond->lock, flags);
- dev_kfree_skb(skb);
- return 0;
- }
-
- do {
- if (IS_UP(slave->dev)
- && (slave->link == BOND_LINK_UP)
- && (slave->state == BOND_STATE_ACTIVE)) {
- if (device_we_should_send_to) {
- struct sk_buff *skb2;
- if ((skb2 = skb_clone(skb, GFP_ATOMIC)) ==
NULL) {
- printk(KERN_ERR "bond_xmit_broadcast:
skb_clone() failed\n");
- continue;
- }
-
- skb2->dev = device_we_should_send_to;
- skb2->priority = 1;
- dev_queue_xmit(skb2);
- }
- device_we_should_send_to = slave->dev;
- }
- } while ((slave = slave->next) != start_at);
-
- if (device_we_should_send_to) {
- skb->dev = device_we_should_send_to;
- skb->priority = 1;
- dev_queue_xmit(skb);
- } else
- dev_kfree_skb(skb);
-
- /* frame sent to all suitable interfaces */
- read_unlock_irqrestore(&bond->lock, flags);
- return 0;
-}
-
-static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *dev)
-{
- slave_t *slave, *start_at;
- struct bonding *bond = (struct bonding *) dev->priv;
- unsigned long flags;
-
- if (!IS_UP(dev)) { /* bond down */
- dev_kfree_skb(skb);
- return 0;
- }
-
- read_lock_irqsave(&bond->lock, flags);
-
- read_lock(&bond->ptrlock);
- slave = start_at = bond->current_slave;
- read_unlock(&bond->ptrlock);
-
- if (slave == NULL) { /* we're at the root, get the first slave */
- /* no suitable interface, frame not sent */
- dev_kfree_skb(skb);
- read_unlock_irqrestore(&bond->lock, flags);
- return 0;
- }
-
- do {
- if (IS_UP(slave->dev)
- && (slave->link == BOND_LINK_UP)
- && (slave->state == BOND_STATE_ACTIVE)) {
-
- skb->dev = slave->dev;
- skb->priority = 1;
- dev_queue_xmit(skb);
-
- write_lock(&bond->ptrlock);
- bond->current_slave = slave->next;
- write_unlock(&bond->ptrlock);
-
- read_unlock_irqrestore(&bond->lock, flags);
- return 0;
- }
- } while ((slave = slave->next) != start_at);
-
- /* no suitable interface, frame not sent */
- dev_kfree_skb(skb);
- read_unlock_irqrestore(&bond->lock, flags);
- 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 *dev)
-{
- slave_t *slave, *start_at;
- struct bonding *bond = (struct bonding *) dev->priv;
- unsigned long flags;
- struct ethhdr *data = (struct ethhdr *)skb->data;
- int slave_no;
-
- if (!IS_UP(dev)) { /* bond down */
- dev_kfree_skb(skb);
- return 0;
- }
-
- read_lock_irqsave(&bond->lock, flags);
- slave = bond->prev;
-
- /* we're at the root, get the first slave */
- if (bond->slave_cnt == 0) {
- /* no suitable interface, frame not sent */
- dev_kfree_skb(skb);
- read_unlock_irqrestore(&bond->lock, flags);
- return 0;
- }
-
- slave_no = (data->h_dest[5]^slave->dev->dev_addr[5]) % bond->slave_cnt;
-
- while ( (slave_no > 0) && (slave != (slave_t *)bond) ) {
- slave = slave->prev;
- slave_no--;
- }
- start_at = slave;
-
- do {
- if (IS_UP(slave->dev)
- && (slave->link == BOND_LINK_UP)
- && (slave->state == BOND_STATE_ACTIVE)) {
-
- skb->dev = slave->dev;
- skb->priority = 1;
- dev_queue_xmit(skb);
-
- read_unlock_irqrestore(&bond->lock, flags);
- return 0;
- }
- } while ((slave = slave->next) != start_at);
-
- /* no suitable interface, frame not sent */
- dev_kfree_skb(skb);
- read_unlock_irqrestore(&bond->lock, flags);
- return 0;
-}
-
-/*
- * in active-backup mode, we know that bond->current_slave is always valid if
- * the bond has a usable interface.
- */
-static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *dev)
-{
- struct bonding *bond = (struct bonding *) dev->priv;
- unsigned long flags;
- int ret;
-
- if (!IS_UP(dev)) { /* bond down */
- dev_kfree_skb(skb);
- return 0;
- }
-
- /* if we are sending arp packets, try to at least
- identify our own ip address */
- if ( (arp_interval > 0) && (my_ip == 0) &&
- (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);
- }
-
- /* if we are sending arp packets and don't know
- * the target hw address, save it so we don't need
- * to use a broadcast address.
- * don't do this if in active backup mode because the slaves must
- * receive packets to stay up, and the only ones they receive are
- * broadcasts.
- */
- if ( (bond_mode != BOND_MODE_ACTIVEBACKUP) &&
- (arp_ip_count == 1) &&
- (arp_interval > 0) && (arp_target_hw_addr == NULL) &&
- (skb->protocol == __constant_htons(ETH_P_IP) ) ) {
- struct ethhdr *eth_hdr =
- (struct ethhdr *) (((char *)skb->data));
- struct iphdr *ip_hdr = (struct iphdr *)(eth_hdr + 1);
-
- if (arp_target[0] == ip_hdr->daddr) {
- arp_target_hw_addr = kmalloc(ETH_ALEN, GFP_KERNEL);
- if (arp_target_hw_addr != NULL)
- memcpy(arp_target_hw_addr, eth_hdr->h_dest,
ETH_ALEN);
- }
- }
-
- read_lock_irqsave(&bond->lock, flags);
-
- read_lock(&bond->ptrlock);
- if (bond->current_slave != NULL) { /* one usable interface */
- skb->dev = bond->current_slave->dev;
- read_unlock(&bond->ptrlock);
- skb->priority = 1;
- ret = dev_queue_xmit(skb);
- read_unlock_irqrestore(&bond->lock, flags);
- return 0;
- }
- else {
- read_unlock(&bond->ptrlock);
- }
-
- /* no suitable interface, frame not sent */
-#ifdef BONDING_DEBUG
- printk(KERN_INFO "There was no suitable interface, so we don't
transmit\n");
-#endif
- dev_kfree_skb(skb);
- read_unlock_irqrestore(&bond->lock, flags);
- return 0;
-}
-
-static struct net_device_stats *bond_get_stats(struct net_device *dev)
-{
- bonding_t *bond = dev->priv;
- struct net_device_stats *stats = bond->stats, *sstats;
- slave_t *slave;
- unsigned long flags;
-
- memset(bond->stats, 0, sizeof(struct net_device_stats));
-
- read_lock_irqsave(&bond->lock, flags);
-
- for (slave = bond->prev; slave != (slave_t *)bond; slave = slave->prev)
{
- 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_irqrestore(&bond->lock, flags);
- return stats;
-}
-
-static int bond_get_info(char *buf, char **start, off_t offset, int length)
-{
- bonding_t *bond = these_bonds;
- int len = 0;
- off_t begin = 0;
- u16 link;
- slave_t *slave = NULL;
- unsigned long flags;
-
- while (bond != NULL) {
- /*
- * This function locks the mutex, so we can't lock it until
- * afterwards
- */
- link = bond_check_mii_link(bond);
-
- len += sprintf(buf + len, "Bonding Mode: %s\n",
- bond_mode_name());
-
- if (bond_mode == BOND_MODE_ACTIVEBACKUP) {
- read_lock_irqsave(&bond->lock, flags);
- read_lock(&bond->ptrlock);
- if (bond->current_slave != NULL) {
- len += sprintf(buf + len,
- "Currently Active Slave: %s\n",
- bond->current_slave->dev->name);
- }
- read_unlock(&bond->ptrlock);
- read_unlock_irqrestore(&bond->lock, flags);
- }
-
- len += sprintf(buf + len, "MII Status: ");
- len += sprintf(buf + len,
- link == BMSR_LSTATUS ? "up\n" : "down\n");
- len += sprintf(buf + len, "MII Polling Interval (ms): %d\n",
- miimon);
- len += sprintf(buf + len, "Up Delay (ms): %d\n",
- updelay * miimon);
- len += sprintf(buf + len, "Down Delay (ms): %d\n",
- downdelay * miimon);
- len += sprintf(buf + len, "Multicast Mode: %s\n",
- multicast_mode_name());
-
- read_lock_irqsave(&bond->lock, flags);
- for (slave = bond->prev; slave != (slave_t *)bond;
- slave = slave->prev) {
- len += sprintf(buf + len, "\nSlave Interface: %s\n",
slave->dev->name);
-
- len += sprintf(buf + len, "MII Status: ");
-
- len += sprintf(buf + len,
- slave->link == BOND_LINK_UP ?
- "up\n" : "down\n");
- len += sprintf(buf + len, "Link Failure Count: %d\n",
- slave->link_failure_count);
-
- len += sprintf(buf + len,
- "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]);
- }
- read_unlock_irqrestore(&bond->lock, flags);
-
- /*
- * Figure out the calcs for the /proc/net interface
- */
- *start = buf + (offset - begin);
- len -= (offset - begin);
- if (len > length) {
- len = length;
- }
- if (len < 0) {
- len = 0;
- }
-
-
- bond = bond->next_bond;
- }
- return len;
-}
-
-static int bond_event(struct notifier_block *this, unsigned long event,
- void *ptr)
-{
- struct bonding *this_bond = (struct bonding *)these_bonds;
- struct bonding *last_bond;
- struct net_device *event_dev = (struct net_device *)ptr;
-
- /* while there are bonds configured */
- while (this_bond != NULL) {
- if (this_bond == event_dev->priv ) {
- switch (event) {
- case NETDEV_UNREGISTER:
- /*
- * remove this bond from a linked list of
- * bonds
- */
- if (this_bond == these_bonds) {
- these_bonds = this_bond->next_bond;
- } else {
- for (last_bond = these_bonds;
- last_bond != NULL;
- last_bond = last_bond->next_bond) {
- if (last_bond->next_bond ==
- this_bond) {
- last_bond->next_bond =
- this_bond->next_bond;
- }
- }
- }
- return NOTIFY_DONE;
-
- default:
- return NOTIFY_DONE;
- }
- } else if (this_bond->device == event_dev->master) {
- switch (event) {
- case NETDEV_UNREGISTER:
- bond_release(this_bond->device, event_dev);
- break;
- }
- return NOTIFY_DONE;
- }
- this_bond = this_bond->next_bond;
- }
- return NOTIFY_DONE;
-}
-
-static struct notifier_block bond_netdev_notifier = {
- notifier_call: bond_event,
-};
-
-static int __init bond_init(struct net_device *dev)
-{
- bonding_t *bond, *this_bond, *last_bond;
- int count;
-
-#ifdef BONDING_DEBUG
- printk (KERN_INFO "Begin bond_init for %s\n", dev->name);
-#endif
- bond = kmalloc(sizeof(struct bonding), GFP_KERNEL);
- if (bond == NULL) {
- return -ENOMEM;
- }
- memset(bond, 0, sizeof(struct bonding));
-
- /* initialize rwlocks */
- rwlock_init(&bond->lock);
- rwlock_init(&bond->ptrlock);
-
- bond->stats = kmalloc(sizeof(struct net_device_stats), GFP_KERNEL);
- if (bond->stats == NULL) {
- kfree(bond);
- return -ENOMEM;
- }
- memset(bond->stats, 0, sizeof(struct net_device_stats));
-
- bond->next = bond->prev = (slave_t *)bond;
- bond->current_slave = NULL;
- bond->current_arp_slave = NULL;
- bond->device = dev;
- dev->priv = bond;
-
- /* Initialize the device structure. */
- switch (bond_mode) {
- case BOND_MODE_ACTIVEBACKUP:
- dev->hard_start_xmit = bond_xmit_activebackup;
- break;
- case BOND_MODE_ROUNDROBIN:
- dev->hard_start_xmit = bond_xmit_roundrobin;
- break;
- case BOND_MODE_XOR:
- dev->hard_start_xmit = bond_xmit_xor;
- break;
- case BOND_MODE_BROADCAST:
- dev->hard_start_xmit = bond_xmit_broadcast;
- break;
- default:
- printk(KERN_ERR "Unknown bonding mode %d\n", bond_mode);
- kfree(bond->stats);
- kfree(bond);
- return -EINVAL;
- }
-
- dev->get_stats = bond_get_stats;
- dev->open = bond_open;
- dev->stop = bond_close;
- dev->set_multicast_list = set_multicast_list;
- dev->do_ioctl = bond_ioctl;
-
- /*
- * Fill in the fields of the device structure with ethernet-generic
- * values.
- */
-
- ether_setup(dev);
-
- dev->tx_queue_len = 0;
- dev->flags |= IFF_MASTER|IFF_MULTICAST;
-#ifdef CONFIG_NET_FASTROUTE
- dev->accept_fastpath = bond_accept_fastpath;
-#endif
-
- printk(KERN_INFO "%s registered with", dev->name);
- if (miimon > 0) {
- printk(" MII link monitoring set to %d ms", miimon);
- updelay /= miimon;
- downdelay /= miimon;
- } else {
- printk("out MII link monitoring");
- }
- printk(", in %s mode.\n", bond_mode_name());
-
- printk(KERN_INFO "%s registered with", dev->name);
- if (arp_interval > 0) {
- printk(" ARP monitoring set to %d ms with %d target(s):",
- arp_interval, arp_ip_count);
- for (count=0 ; count<arp_ip_count ; count++)
- printk (" %s", arp_ip_target[count]);
- printk("\n");
- } else {
- printk("out ARP monitoring\n");
- }
-
-#ifdef CONFIG_PROC_FS
- bond->bond_proc_dir = proc_mkdir(dev->name, proc_net);
- if (bond->bond_proc_dir == NULL) {
- printk(KERN_ERR "%s: Cannot init /proc/net/%s/\n",
- dev->name, dev->name);
- kfree(bond->stats);
- kfree(bond);
- return -ENOMEM;
- }
- bond->bond_proc_info_file =
- create_proc_info_entry("info", 0, bond->bond_proc_dir,
- bond_get_info);
- if (bond->bond_proc_info_file == NULL) {
- printk(KERN_ERR "%s: Cannot init /proc/net/%s/info\n",
- dev->name, dev->name);
- remove_proc_entry(dev->name, proc_net);
- kfree(bond->stats);
- kfree(bond);
- return -ENOMEM;
- }
-#endif /* CONFIG_PROC_FS */
-
- if (first_pass == 1) {
- these_bonds = bond;
- register_netdevice_notifier(&bond_netdev_notifier);
- first_pass = 0;
- } else {
- last_bond = these_bonds;
- this_bond = these_bonds->next_bond;
- while (this_bond != NULL) {
- last_bond = this_bond;
- this_bond = this_bond->next_bond;
- }
- last_bond->next_bond = bond;
- }
-
- return 0;
-}
-
-/*
-static int __init bond_probe(struct net_device *dev)
-{
- bond_init(dev);
- return 0;
-}
- */
-
-/*
- * 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 != NULL; i++) {
- if ((isdigit(*mode_arg) &&
- tbl[i].mode == simple_strtol(mode_arg, NULL, 0)) ||
- (0 == strncmp(mode_arg, tbl[i].modename,
- strlen(tbl[i].modename)))) {
- return tbl[i].mode;
- }
- }
-
- return -1;
-}
-
-
-static int __init bonding_init(void)
-{
- int no;
- int err;
-
- /* Find a name for this unit */
- static struct net_device *dev_bond = NULL;
-
- printk(KERN_INFO "%s", version);
-
- /*
- * Convert string parameters.
- */
- if (mode) {
- bond_mode = bond_parse_parm(mode, bond_mode_tbl);
- if (bond_mode == -1) {
- printk(KERN_WARNING
- "bonding_init(): Invalid bonding mode \"%s\"\n",
- mode == NULL ? "NULL" : mode);
- return -EINVAL;
- }
- }
-
- if (multicast) {
- multicast_mode = bond_parse_parm(multicast, bond_mc_tbl);
- if (multicast_mode == -1) {
- printk(KERN_WARNING
- "bonding_init(): Invalid multicast mode \"%s\"\n",
- multicast == NULL ? "NULL" : multicast);
- return -EINVAL;
- }
- }
-
- if (max_bonds < 1 || max_bonds > INT_MAX) {
- printk(KERN_WARNING
- "bonding_init(): 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;
- }
- dev_bond = dev_bonds = kmalloc(max_bonds*sizeof(struct net_device),
- GFP_KERNEL);
- if (dev_bond == NULL) {
- return -ENOMEM;
- }
- memset(dev_bonds, 0, max_bonds*sizeof(struct net_device));
-
- if (miimon < 0) {
- printk(KERN_WARNING
- "bonding_init(): 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
- "bonding_init(): 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
- "bonding_init(): downdelay module parameter (%d), "
- "not in range 0-%d, so it was reset to 0\n",
- downdelay, INT_MAX);
- downdelay = 0;
- }
-
- if (miimon == 0) {
- if ((updelay != 0) || (downdelay != 0)) {
- /* just warn the user the up/down delay will have
- * no effect since miimon is zero...
- */
- printk(KERN_WARNING
- "bonding_init(): 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 != 0) {
- printk(KERN_WARNING
- "bonding_init(): 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) {
- /* updelay will be rounded in bond_init() when it
- * is divided by miimon, we just inform user here
- */
- printk(KERN_WARNING
- "bonding_init(): updelay (%d) is not a multiple "
- "of miimon (%d), updelay rounded to %d ms\n",
- updelay, miimon, (updelay / miimon) * miimon);
- }
-
- if ((downdelay % miimon) != 0) {
- /* downdelay will be rounded in bond_init() when it
- * is divided by miimon, we just inform user here
- */
- printk(KERN_WARNING
- "bonding_init(): downdelay (%d) is not a "
- "multiple of miimon (%d), downdelay rounded "
- "to %d ms\n",
- downdelay, miimon,
- (downdelay / miimon) * miimon);
- }
- }
-
- if (arp_interval < 0) {
- printk(KERN_WARNING
- "bonding_init(): 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 < MAX_ARP_IP_TARGETS) &&
arp_ip_target[arp_ip_count];
- arp_ip_count++ ) {
- /* TODO: check and log bad ip address */
- if (my_inet_aton(arp_ip_target[arp_ip_count],
- &arp_target[arp_ip_count]) == 0) {
- printk(KERN_WARNING
- "bonding_init(): bad arp_ip_target module "
- "parameter (%s), ARP monitoring will not be "
- "performed\n",
- arp_ip_target[arp_ip_count]);
- arp_interval = 0;
- }
- }
-
-
- if ( (arp_interval > 0) && (arp_ip_count==0)) {
- /* don't allow arping if no arp_ip_target given... */
- printk(KERN_WARNING
- "bonding_init(): 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 == 0) && (arp_interval == 0)) {
- /* miimon and arp_interval not set, we need one so things
- * work as expected, see bonding.txt for details
- */
- printk(KERN_ERR
- "bonding_init(): 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 != NULL) && (bond_mode != BOND_MODE_ACTIVEBACKUP)){
- /* currently, using a primary only makes sence
- * in active backup mode
- */
- printk(KERN_WARNING
- "bonding_init(): %s primary device specified but has "
- " no effect in %s mode\n",
- primary, bond_mode_name());
- primary = NULL;
- }
-
-
- for (no = 0; no < max_bonds; no++) {
- dev_bond->init = bond_init;
-
- err = dev_alloc_name(dev_bond,"bond%d");
- if (err < 0) {
- kfree(dev_bonds);
- return err;
- }
- SET_MODULE_OWNER(dev_bond);
- if (register_netdev(dev_bond) != 0) {
- kfree(dev_bonds);
- return -EIO;
- }
- dev_bond++;
- }
- return 0;
-}
-
-static void __exit bonding_exit(void)
-{
- struct net_device *dev_bond = dev_bonds;
- struct bonding *bond;
- int no;
-
- unregister_netdevice_notifier(&bond_netdev_notifier);
-
- for (no = 0; no < max_bonds; no++) {
-
-#ifdef CONFIG_PROC_FS
- bond = (struct bonding *) dev_bond->priv;
- remove_proc_entry("info", bond->bond_proc_dir);
- remove_proc_entry(dev_bond->name, proc_net);
-#endif
- unregister_netdev(dev_bond);
- kfree(bond->stats);
- kfree(dev_bond->priv);
-
- dev_bond->priv = NULL;
- dev_bond++;
- }
- kfree(dev_bonds);
-}
-
-module_init(bonding_init);
-module_exit(bonding_exit);
-MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION(DRV_DESCRIPTION ", v" DRV_VERSION);
-
-/*
- * Local variables:
- * c-indent-level: 8
- * c-basic-offset: 8
- * tab-width: 8
- * End:
- */
diff -Nuarp linux-2.4.20-bonding-20030317/drivers/net/Makefile
linux-2.4.20-bonding-20030317-devel/drivers/net/Makefile
--- linux-2.4.20-bonding-20030317/drivers/net/Makefile 2003-03-18
17:03:29.000000000 +0200
+++ linux-2.4.20-bonding-20030317-devel/drivers/net/Makefile 2003-03-18
17:03:29.000000000 +0200
@@ -29,6 +29,10 @@ ifeq ($(CONFIG_E1000),y)
obj-y += e1000/e1000.o
endif
+ifeq ($(CONFIG_BONDING),y)
+ obj-y += bonding/bonding.o
+endif
+
ifeq ($(CONFIG_ISDN_PPP),y)
obj-$(CONFIG_ISDN) += slhc.o
endif
@@ -46,6 +50,7 @@ subdir-$(CONFIG_SK98LIN) += sk98lin
subdir-$(CONFIG_SKFP) += skfp
subdir-$(CONFIG_E100) += e100
subdir-$(CONFIG_E1000) += e1000
+subdir-$(CONFIG_BONDING) += bonding
#
# link order important here
@@ -157,7 +162,6 @@ endif
obj-$(CONFIG_STRIP) += strip.o
obj-$(CONFIG_DUMMY) += dummy.o
-obj-$(CONFIG_BONDING) += bonding.o
obj-$(CONFIG_DE600) += de600.o
obj-$(CONFIG_DE620) += de620.o
obj-$(CONFIG_AT1500) += lance.o
--
| Shmulik Hen |
| Israel Design Center (Jerusalem) |
| LAN Access Division |
| Intel Communications Group, Intel corp. |
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