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-rw-r--r--qemu/roms/ipxe/src/net/vlan.c508
1 files changed, 0 insertions, 508 deletions
diff --git a/qemu/roms/ipxe/src/net/vlan.c b/qemu/roms/ipxe/src/net/vlan.c
deleted file mode 100644
index f515c2dc9..000000000
--- a/qemu/roms/ipxe/src/net/vlan.c
+++ /dev/null
@@ -1,508 +0,0 @@
-/*
- * Copyright (C) 2010 Michael Brown <mbrown@fensystems.co.uk>.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- * 02110-1301, USA.
- *
- * You can also choose to distribute this program under the terms of
- * the Unmodified Binary Distribution Licence (as given in the file
- * COPYING.UBDL), provided that you have satisfied its requirements.
- */
-
-FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
-
-#include <stdint.h>
-#include <string.h>
-#include <stdio.h>
-#include <errno.h>
-#include <byteswap.h>
-#include <ipxe/features.h>
-#include <ipxe/if_ether.h>
-#include <ipxe/ethernet.h>
-#include <ipxe/netdevice.h>
-#include <ipxe/iobuf.h>
-#include <ipxe/vlan.h>
-
-/** @file
- *
- * Virtual LANs
- *
- */
-
-FEATURE ( FEATURE_PROTOCOL, "VLAN", DHCP_EB_FEATURE_VLAN, 1 );
-
-struct net_protocol vlan_protocol __net_protocol;
-
-/** VLAN device private data */
-struct vlan_device {
- /** Trunk network device */
- struct net_device *trunk;
- /** VLAN tag */
- unsigned int tag;
- /** Default priority */
- unsigned int priority;
-};
-
-/**
- * Open VLAN device
- *
- * @v netdev Network device
- * @ret rc Return status code
- */
-static int vlan_open ( struct net_device *netdev ) {
- struct vlan_device *vlan = netdev->priv;
-
- return netdev_open ( vlan->trunk );
-}
-
-/**
- * Close VLAN device
- *
- * @v netdev Network device
- */
-static void vlan_close ( struct net_device *netdev ) {
- struct vlan_device *vlan = netdev->priv;
-
- netdev_close ( vlan->trunk );
-}
-
-/**
- * Transmit packet on VLAN device
- *
- * @v netdev Network device
- * @v iobuf I/O buffer
- * @ret rc Return status code
- */
-static int vlan_transmit ( struct net_device *netdev,
- struct io_buffer *iobuf ) {
- struct vlan_device *vlan = netdev->priv;
- struct net_device *trunk = vlan->trunk;
- struct ll_protocol *ll_protocol;
- struct vlan_header *vlanhdr;
- uint8_t ll_dest_copy[ETH_ALEN];
- uint8_t ll_source_copy[ETH_ALEN];
- const void *ll_dest;
- const void *ll_source;
- uint16_t net_proto;
- unsigned int flags;
- int rc;
-
- /* Strip link-layer header and preserve link-layer header fields */
- ll_protocol = netdev->ll_protocol;
- if ( ( rc = ll_protocol->pull ( netdev, iobuf, &ll_dest, &ll_source,
- &net_proto, &flags ) ) != 0 ) {
- DBGC ( netdev, "VLAN %s could not parse link-layer header: "
- "%s\n", netdev->name, strerror ( rc ) );
- return rc;
- }
- memcpy ( ll_dest_copy, ll_dest, ETH_ALEN );
- memcpy ( ll_source_copy, ll_source, ETH_ALEN );
-
- /* Construct VLAN header */
- vlanhdr = iob_push ( iobuf, sizeof ( *vlanhdr ) );
- vlanhdr->tci = htons ( VLAN_TCI ( vlan->tag, vlan->priority ) );
- vlanhdr->net_proto = net_proto;
-
- /* Reclaim I/O buffer from VLAN device's TX queue */
- list_del ( &iobuf->list );
-
- /* Transmit packet on trunk device */
- if ( ( rc = net_tx ( iob_disown ( iobuf ), trunk, &vlan_protocol,
- ll_dest_copy, ll_source_copy ) ) != 0 ) {
- DBGC ( netdev, "VLAN %s could not transmit: %s\n",
- netdev->name, strerror ( rc ) );
- /* Cannot return an error status, since that would
- * cause the I/O buffer to be double-freed.
- */
- return 0;
- }
-
- return 0;
-}
-
-/**
- * Poll VLAN device
- *
- * @v netdev Network device
- */
-static void vlan_poll ( struct net_device *netdev ) {
- struct vlan_device *vlan = netdev->priv;
-
- /* Poll trunk device */
- netdev_poll ( vlan->trunk );
-}
-
-/**
- * Enable/disable interrupts on VLAN device
- *
- * @v netdev Network device
- * @v enable Interrupts should be enabled
- */
-static void vlan_irq ( struct net_device *netdev, int enable ) {
- struct vlan_device *vlan = netdev->priv;
-
- /* Enable/disable interrupts on trunk device. This is not at
- * all robust, but there is no sensible course of action
- * available.
- */
- netdev_irq ( vlan->trunk, enable );
-}
-
-/** VLAN device operations */
-static struct net_device_operations vlan_operations = {
- .open = vlan_open,
- .close = vlan_close,
- .transmit = vlan_transmit,
- .poll = vlan_poll,
- .irq = vlan_irq,
-};
-
-/**
- * Synchronise VLAN device
- *
- * @v netdev Network device
- */
-static void vlan_sync ( struct net_device *netdev ) {
- struct vlan_device *vlan = netdev->priv;
- struct net_device *trunk = vlan->trunk;
-
- /* Synchronise link status */
- if ( netdev->link_rc != trunk->link_rc )
- netdev_link_err ( netdev, trunk->link_rc );
-
- /* Synchronise open/closed status */
- if ( netdev_is_open ( trunk ) ) {
- if ( ! netdev_is_open ( netdev ) )
- netdev_open ( netdev );
- } else {
- if ( netdev_is_open ( netdev ) )
- netdev_close ( netdev );
- }
-}
-
-/**
- * Identify VLAN device
- *
- * @v trunk Trunk network device
- * @v tag VLAN tag
- * @ret netdev VLAN device, if any
- */
-struct net_device * vlan_find ( struct net_device *trunk, unsigned int tag ) {
- struct net_device *netdev;
- struct vlan_device *vlan;
-
- for_each_netdev ( netdev ) {
- if ( netdev->op != &vlan_operations )
- continue;
- vlan = netdev->priv;
- if ( ( vlan->trunk == trunk ) && ( vlan->tag == tag ) )
- return netdev;
- }
- return NULL;
-}
-
-/**
- * Process incoming VLAN packet
- *
- * @v iobuf I/O buffer
- * @v trunk Trunk network device
- * @v ll_dest Link-layer destination address
- * @v ll_source Link-layer source address
- * @v flags Packet flags
- * @ret rc Return status code
- */
-static int vlan_rx ( struct io_buffer *iobuf, struct net_device *trunk,
- const void *ll_dest, const void *ll_source,
- unsigned int flags __unused ) {
- struct vlan_header *vlanhdr = iobuf->data;
- struct net_device *netdev;
- struct ll_protocol *ll_protocol;
- uint8_t ll_dest_copy[ETH_ALEN];
- uint8_t ll_source_copy[ETH_ALEN];
- uint16_t tag;
- int rc;
-
- /* Sanity check */
- if ( iob_len ( iobuf ) < sizeof ( *vlanhdr ) ) {
- DBGC ( trunk, "VLAN %s received underlength packet (%zd "
- "bytes)\n", trunk->name, iob_len ( iobuf ) );
- rc = -EINVAL;
- goto err_sanity;
- }
-
- /* Identify VLAN device */
- tag = VLAN_TAG ( ntohs ( vlanhdr->tci ) );
- netdev = vlan_find ( trunk, tag );
- if ( ! netdev ) {
- DBGC2 ( trunk, "VLAN %s received packet for unknown VLAN "
- "%d\n", trunk->name, tag );
- rc = -EPIPE;
- goto err_no_vlan;
- }
-
- /* Strip VLAN header and preserve original link-layer header fields */
- iob_pull ( iobuf, sizeof ( *vlanhdr ) );
- ll_protocol = trunk->ll_protocol;
- memcpy ( ll_dest_copy, ll_dest, ETH_ALEN );
- memcpy ( ll_source_copy, ll_source, ETH_ALEN );
-
- /* Reconstruct link-layer header for VLAN device */
- ll_protocol = netdev->ll_protocol;
- if ( ( rc = ll_protocol->push ( netdev, iobuf, ll_dest_copy,
- ll_source_copy,
- vlanhdr->net_proto ) ) != 0 ) {
- DBGC ( netdev, "VLAN %s could not reconstruct link-layer "
- "header: %s\n", netdev->name, strerror ( rc ) );
- goto err_ll_push;
- }
-
- /* Enqueue packet on VLAN device */
- netdev_rx ( netdev, iob_disown ( iobuf ) );
- return 0;
-
- err_ll_push:
- err_no_vlan:
- err_sanity:
- free_iob ( iobuf );
- return rc;
-}
-
-/** VLAN protocol */
-struct net_protocol vlan_protocol __net_protocol = {
- .name = "VLAN",
- .net_proto = htons ( ETH_P_8021Q ),
- .rx = vlan_rx,
-};
-
-/**
- * Get the VLAN tag
- *
- * @v netdev Network device
- * @ret tag VLAN tag, or 0 if device is not a VLAN device
- */
-unsigned int vlan_tag ( struct net_device *netdev ) {
- struct vlan_device *vlan;
-
- if ( netdev->op == &vlan_operations ) {
- vlan = netdev->priv;
- return vlan->tag;
- } else {
- return 0;
- }
-}
-
-/**
- * Check if network device can be used as a VLAN trunk device
- *
- * @v trunk Trunk network device
- * @ret is_ok Trunk network device is usable
- *
- * VLAN devices will be created as Ethernet devices. (We cannot
- * simply clone the link layer of the trunk network device, because
- * this link layer may expect the network device structure to contain
- * some link-layer-private data.) The trunk network device must
- * therefore have a link layer that is in some sense 'compatible' with
- * Ethernet; specifically, it must have link-layer addresses that are
- * the same length as Ethernet link-layer addresses.
- *
- * As an additional check, and primarily to assist with the sanity of
- * the FCoE code, we refuse to allow nested VLANs.
- */
-int vlan_can_be_trunk ( struct net_device *trunk ) {
-
- return ( ( trunk->ll_protocol->ll_addr_len == ETH_ALEN ) &&
- ( trunk->op != &vlan_operations ) );
-}
-
-/**
- * Create VLAN device
- *
- * @v trunk Trunk network device
- * @v tag VLAN tag
- * @v priority Default VLAN priority
- * @ret rc Return status code
- */
-int vlan_create ( struct net_device *trunk, unsigned int tag,
- unsigned int priority ) {
- struct net_device *netdev;
- struct vlan_device *vlan;
- int rc;
-
- /* If VLAN already exists, just update the priority */
- if ( ( netdev = vlan_find ( trunk, tag ) ) != NULL ) {
- vlan = netdev->priv;
- if ( priority != vlan->priority ) {
- DBGC ( netdev, "VLAN %s priority changed from %d to "
- "%d\n", netdev->name, vlan->priority, priority );
- }
- vlan->priority = priority;
- return 0;
- }
-
- /* Sanity checks */
- if ( ! vlan_can_be_trunk ( trunk ) ) {
- DBGC ( trunk, "VLAN %s cannot create VLAN on non-trunk "
- "device\n", trunk->name );
- rc = -ENOTTY;
- goto err_sanity;
- }
- if ( ! VLAN_TAG_IS_VALID ( tag ) ) {
- DBGC ( trunk, "VLAN %s cannot create VLAN with invalid tag "
- "%d\n", trunk->name, tag );
- rc = -EINVAL;
- goto err_sanity;
- }
- if ( ! VLAN_PRIORITY_IS_VALID ( priority ) ) {
- DBGC ( trunk, "VLAN %s cannot create VLAN with invalid "
- "priority %d\n", trunk->name, priority );
- rc = -EINVAL;
- goto err_sanity;
- }
-
- /* Allocate and initialise structure */
- netdev = alloc_etherdev ( sizeof ( *vlan ) );
- if ( ! netdev ) {
- rc = -ENOMEM;
- goto err_alloc_etherdev;
- }
- netdev_init ( netdev, &vlan_operations );
- netdev->dev = trunk->dev;
- memcpy ( netdev->hw_addr, trunk->ll_addr, ETH_ALEN );
- vlan = netdev->priv;
- vlan->trunk = netdev_get ( trunk );
- vlan->tag = tag;
- vlan->priority = priority;
-
- /* Construct VLAN device name */
- snprintf ( netdev->name, sizeof ( netdev->name ), "%s-%d",
- trunk->name, vlan->tag );
-
- /* Mark device as not supporting interrupts, if applicable */
- if ( ! netdev_irq_supported ( trunk ) )
- netdev->state |= NETDEV_IRQ_UNSUPPORTED;
-
- /* Register VLAN device */
- if ( ( rc = register_netdev ( netdev ) ) != 0 ) {
- DBGC ( netdev, "VLAN %s could not register: %s\n",
- netdev->name, strerror ( rc ) );
- goto err_register;
- }
-
- /* Synchronise with trunk device */
- vlan_sync ( netdev );
-
- DBGC ( netdev, "VLAN %s created with tag %d and priority %d\n",
- netdev->name, vlan->tag, vlan->priority );
-
- return 0;
-
- unregister_netdev ( netdev );
- err_register:
- netdev_nullify ( netdev );
- netdev_put ( netdev );
- netdev_put ( trunk );
- err_alloc_etherdev:
- err_sanity:
- return rc;
-}
-
-/**
- * Destroy VLAN device
- *
- * @v netdev Network device
- * @ret rc Return status code
- */
-int vlan_destroy ( struct net_device *netdev ) {
- struct vlan_device *vlan = netdev->priv;
- struct net_device *trunk;
-
- /* Sanity check */
- if ( netdev->op != &vlan_operations ) {
- DBGC ( netdev, "VLAN %s cannot destroy non-VLAN device\n",
- netdev->name );
- return -ENOTTY;
- }
-
- DBGC ( netdev, "VLAN %s destroyed\n", netdev->name );
-
- /* Remove VLAN device */
- unregister_netdev ( netdev );
- trunk = vlan->trunk;
- netdev_nullify ( netdev );
- netdev_put ( netdev );
- netdev_put ( trunk );
-
- return 0;
-}
-
-/**
- * Handle trunk network device link state change
- *
- * @v trunk Trunk network device
- */
-static void vlan_notify ( struct net_device *trunk ) {
- struct net_device *netdev;
- struct vlan_device *vlan;
-
- for_each_netdev ( netdev ) {
- if ( netdev->op != &vlan_operations )
- continue;
- vlan = netdev->priv;
- if ( vlan->trunk == trunk )
- vlan_sync ( netdev );
- }
-}
-
-/**
- * Destroy first VLAN device for a given trunk
- *
- * @v trunk Trunk network device
- * @ret found A VLAN device was found
- */
-static int vlan_remove_first ( struct net_device *trunk ) {
- struct net_device *netdev;
- struct vlan_device *vlan;
-
- for_each_netdev ( netdev ) {
- if ( netdev->op != &vlan_operations )
- continue;
- vlan = netdev->priv;
- if ( vlan->trunk == trunk ) {
- vlan_destroy ( netdev );
- return 1;
- }
- }
- return 0;
-}
-
-/**
- * Destroy all VLAN devices for a given trunk
- *
- * @v trunk Trunk network device
- */
-static void vlan_remove ( struct net_device *trunk ) {
-
- /* Remove all VLAN devices attached to this trunk, safe
- * against arbitrary net device removal.
- */
- while ( vlan_remove_first ( trunk ) ) {}
-}
-
-/** VLAN driver */
-struct net_driver vlan_driver __net_driver = {
- .name = "VLAN",
- .notify = vlan_notify,
- .remove = vlan_remove,
-};