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https://github.com/ipxe/ipxe
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[lacp] Add simple LACP implementation
Some switch configurations will refuse to enable our port unless we can speak LACP to inform the switch that we are alive. Add a very simple passive LACP implementation that is sufficient to convince at least Linux's bonding driver (when tested using qemu attached to a tap device enslaved to a bond device configured as "mode=802.3ad"). Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
@@ -171,6 +171,7 @@ FILE_LICENCE ( GPL2_OR_LATER );
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#define ERRFILE_wpa_psk ( ERRFILE_NET | 0x00270000 )
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#define ERRFILE_wpa_tkip ( ERRFILE_NET | 0x00280000 )
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#define ERRFILE_wpa_ccmp ( ERRFILE_NET | 0x00290000 )
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#define ERRFILE_eth_slow ( ERRFILE_NET | 0x002a0000 )
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#define ERRFILE_image ( ERRFILE_IMAGE | 0x00000000 )
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#define ERRFILE_elf ( ERRFILE_IMAGE | 0x00010000 )
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255
src/include/ipxe/eth_slow.h
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255
src/include/ipxe/eth_slow.h
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@@ -0,0 +1,255 @@
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#ifndef _IPXE_ETH_SLOW_H
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#define _IPXE_ETH_SLOW_H
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/** @file
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*
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* Ethernet slow protocols
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*
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*/
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FILE_LICENCE ( GPL2_OR_LATER );
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/** Slow protocols header */
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struct eth_slow_header {
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/** Slow protocols subtype */
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uint8_t subtype;
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/** Subtype version number */
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uint8_t version;
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} __attribute__ (( packed ));
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/** LACP subtype */
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#define ETH_SLOW_SUBTYPE_LACP 1
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/** LACP version number */
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#define ETH_SLOW_LACP_VERSION 1
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/** Marker subtype */
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#define ETH_SLOW_SUBTYPE_MARKER 2
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/** Marker version number */
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#define ETH_SLOW_MARKER_VERSION 1
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/** TLV (type, length, value) header */
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struct eth_slow_tlv_header {
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/** Type
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*
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* This is an ETH_SLOW_TLV_XXX constant.
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*/
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uint8_t type;
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/** Length
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*
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* The length includes the TLV header (except for a TLV
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* terminator, which has a length of zero).
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*/
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uint8_t length;
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} __attribute__ (( packed ));
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/** Terminator type */
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#define ETH_SLOW_TLV_TERMINATOR 0
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/** Terminator length */
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#define ETH_SLOW_TLV_TERMINATOR_LEN 0
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/** LACP actor type */
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#define ETH_SLOW_TLV_LACP_ACTOR 1
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/** LACP actor length */
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#define ETH_SLOW_TLV_LACP_ACTOR_LEN \
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( sizeof ( struct eth_slow_lacp_entity_tlv ) )
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/** LACP partner type */
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#define ETH_SLOW_TLV_LACP_PARTNER 2
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/** LACP partner length */
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#define ETH_SLOW_TLV_LACP_PARTNER_LEN \
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( sizeof ( struct eth_slow_lacp_entity_tlv ) )
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/** LACP collector type */
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#define ETH_SLOW_TLV_LACP_COLLECTOR 3
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/** LACP collector length */
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#define ETH_SLOW_TLV_LACP_COLLECTOR_LEN \
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( sizeof ( struct eth_slow_lacp_collector_tlv ) )
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/** Marker request type */
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#define ETH_SLOW_TLV_MARKER_REQUEST 1
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/** Marker request length */
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#define ETH_SLOW_TLV_MARKER_REQUEST_LEN \
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( sizeof ( struct eth_slow_marker_tlv ) )
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/** Marker response type */
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#define ETH_SLOW_TLV_MARKER_RESPONSE 2
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/** Marker response length */
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#define ETH_SLOW_TLV_MARKER_RESPONSE_LEN \
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( sizeof ( struct eth_slow_marker_tlv ) )
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/** Terminator TLV */
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struct eth_slow_terminator_tlv {
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/** TLV header */
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struct eth_slow_tlv_header tlv;
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} __attribute__ (( packed ));
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/** LACP entity (actor or partner) TLV */
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struct eth_slow_lacp_entity_tlv {
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/** TLV header */
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struct eth_slow_tlv_header tlv;
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/** System priority
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*
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* Used to determine the order in which ports are selected for
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* aggregation.
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*/
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uint16_t system_priority;
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/** System identifier
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*
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* Used to uniquely identify the system (i.e. the entity with
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* potentially multiple ports).
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*/
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uint8_t system[ETH_ALEN];
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/** Key
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*
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* Used to uniquely identify a group of aggregatable ports
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* within a system.
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*/
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uint16_t key;
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/** Port priority
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*
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* Used to determine the order in which ports are selected for
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* aggregation.
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*/
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uint16_t port_priority;
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/** Port identifier
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*
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* Used to uniquely identify a port within a system.
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*/
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uint16_t port;
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/** State
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*
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* This is the bitwise OR of zero or more LACP_STATE_XXX
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* constants.
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*/
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uint8_t state;
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/** Reserved */
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uint8_t reserved[3];
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} __attribute__ (( packed ));
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/** Maximum system priority */
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#define LACP_SYSTEM_PRIORITY_MAX 0xffff
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/** Maximum port priority */
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#define LACP_PORT_PRIORITY_MAX 0xff
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/** LACP entity is active
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*
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* Represented by the state character "A"/"a"
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*/
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#define LACP_STATE_ACTIVE 0x01
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/** LACP timeout is short
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*
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* Short timeout is one second, long timeout is 30s
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*
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* Represented by the state character "F"/"f"
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*/
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#define LACP_STATE_FAST 0x02
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/** LACP link is aggregateable
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*
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* Represented by the state characters "G"/"g"
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*/
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#define LACP_STATE_AGGREGATABLE 0x04
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/** LACP link is in synchronisation
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*
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* Represented by the state characters "S"/"s"
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*/
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#define LACP_STATE_IN_SYNC 0x08
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/** LACP link is collecting (receiving)
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*
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* Represented by the state characters "C"/"c"
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*/
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#define LACP_STATE_COLLECTING 0x10
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/** LACP link is distributing (transmitting)
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*
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* Represented by the state characters "D"/"d"
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*/
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#define LACP_STATE_DISTRIBUTING 0x20
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/** LACP entity is using defaulted partner information
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*
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* Represented by the state characters "L"/"l"
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*/
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#define LACP_STATE_DEFAULTED 0x40
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/** LACP entity receive state machine is in EXPIRED
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*
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* Represented by the state characters "X"/"x"
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*/
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#define LACP_STATE_EXPIRED 0x80
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/** LACP collector TLV */
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struct eth_slow_lacp_collector_tlv {
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/** TLV header */
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struct eth_slow_tlv_header tlv;
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/** Maximum delay (in 10us increments) */
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uint16_t max_delay;
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/** Reserved */
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uint8_t reserved[12];
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} __attribute__ (( packed ));
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/** Marker TLV */
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struct eth_slow_marker_tlv {
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/** TLV header */
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struct eth_slow_tlv_header tlv;
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/** Requester port */
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uint16_t port;
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/** Requester system */
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uint8_t system[ETH_ALEN];
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/** Requester transaction ID */
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uint32_t xact;
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/** Padding */
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uint16_t pad;
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} __attribute__ (( packed ));
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/** LACP packet */
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struct eth_slow_lacp {
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/** Slow protocols header */
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struct eth_slow_header header;
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/** Actor information */
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struct eth_slow_lacp_entity_tlv actor;
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/** Partner information */
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struct eth_slow_lacp_entity_tlv partner;
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/** Collector information */
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struct eth_slow_lacp_collector_tlv collector;
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/** Terminator */
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struct eth_slow_terminator_tlv terminator;
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/** Reserved */
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uint8_t reserved[50];
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} __attribute__ (( packed ));
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/** Marker packet */
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struct eth_slow_marker {
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/** Slow protocols header */
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struct eth_slow_header header;
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/** Marker information */
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struct eth_slow_marker_tlv marker;
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/** Terminator */
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struct eth_slow_terminator_tlv terminator;
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/** Reserved */
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uint8_t reserved[90];
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} __attribute__ (( packed ));
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/** Slow protocols packet */
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union eth_slow_packet {
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/** Slow protocols header */
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struct eth_slow_header header;
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/** LACP packet */
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struct eth_slow_lacp lacp;
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/** Marker packet */
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struct eth_slow_marker marker;
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} __attribute__ (( packed ));
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#endif /* _IPXE_ETH_SLOW_H */
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