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authorJay Vosburgh <fubar@us.ibm.com>2005-06-26 17:54:11 -0400
committerJeff Garzik <jgarzik@pobox.com>2005-06-26 17:54:11 -0400
commit169a3e66637c667b43dab7c319ffd5c99804cad8 (patch)
treef10f7c82ca44b871ae1391c5a3d35a65c463fc9b /include/linux
parentc3ade5cad07f4d67f2e16a28f3c73d9483a55e0e (diff)
bonding: xor/802.3ad improved slave hash
Add support for alternate slave selection algorithms to bonding balance-xor and 802.3ad modes. Default mode (what we have now: xor of MAC addresses) is "layer2", new choice is "layer3+4", using IP and port information for hashing to select peer. Originally submitted by Jason Gabler for balance-xor mode; modified by Jay Vosburgh to additionally support 802.3ad mode. Jason's original comment is as follows: The attached patch to the Linux Etherchannel Bonding driver modifies the driver's "balance-xor" mode as follows: - alternate hashing policy support for mode 2 * Added kernel parameter "xmit_policy" to allow the specification of different hashing policies for mode 2. The original mode 2 policy is the default, now found in xmit_hash_policy_layer2(). * Added xmit_hash_policy_layer34() This patch was inspired by hashing policies implemented by Cisco, Foundry and IBM, which are explained in Foundry documentation found at: http://www.foundrynet.com/services/documentation/sribcg/Trunking.html#112750 Signed-off-by: Jason Gabler <jygabler@lbl.gov> Signed-off-by: Jay Vosburgh <fubar@us.ibm.com>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/if_bonding.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/if_bonding.h b/include/linux/if_bonding.h
index 57024ce2c74f..84598fa2e9de 100644
--- a/include/linux/if_bonding.h
+++ b/include/linux/if_bonding.h
@@ -35,6 +35,9 @@
*
* 2003/12/01 - Shmulik Hen <shmulik.hen at intel dot com>
* - Code cleanup and style changes
+ *
+ * 2005/05/05 - Jason Gabler <jygabler at lbl dot gov>
+ * - added definitions for various XOR hashing policies
*/
#ifndef _LINUX_IF_BONDING_H
@@ -80,6 +83,10 @@
#define BOND_DEFAULT_MAX_BONDS 1 /* Default maximum number of devices to support */
+/* hashing types */
+#define BOND_XMIT_POLICY_LAYER2 0 /* layer 2 (MAC only), default */
+#define BOND_XMIT_POLICY_LAYER34 1 /* layer 3+4 (IP ^ MAC) */
+
typedef struct ifbond {
__s32 bond_mode;
__s32 num_slaves;