--- /dev/null
+/*
+ * 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.
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+#include <stddef.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <byteswap.h>
+#include <ipxe/if_ether.h>
+#include <ipxe/if_arp.h>
+#include <ipxe/iobuf.h>
+#include <ipxe/interface.h>
+#include <ipxe/xfer.h>
+#include <ipxe/netdevice.h>
+#include <ipxe/ethernet.h>
+#include <ipxe/vlan.h>
+#include <ipxe/features.h>
+#include <ipxe/errortab.h>
+#include <ipxe/device.h>
+#include <ipxe/crc32.h>
+#include <ipxe/retry.h>
+#include <ipxe/timer.h>
+#include <ipxe/fc.h>
+#include <ipxe/fip.h>
+#include <ipxe/fcoe.h>
+
+/** @file
+ *
+ * FCoE protocol
+ *
+ */
+
+FEATURE ( FEATURE_PROTOCOL, "FCoE", DHCP_EB_FEATURE_FCOE, 1 );
+
+/* Disambiguate the various error causes */
+#define EINVAL_UNDERLENGTH __einfo_error ( EINFO_EINVAL_UNDERLENGTH )
+#define EINFO_EINVAL_UNDERLENGTH \
+ __einfo_uniqify ( EINFO_EINVAL, 0x01, "Underlength packet" )
+#define EINVAL_SOF __einfo_error ( EINFO_EINVAL_SOF )
+#define EINFO_EINVAL_SOF \
+ __einfo_uniqify ( EINFO_EINVAL, 0x02, "Invalid SoF delimiter" )
+#define EINVAL_CRC __einfo_error ( EINFO_EINVAL_CRC )
+#define EINFO_EINVAL_CRC \
+ __einfo_uniqify ( EINFO_EINVAL, 0x03, "Invalid CRC (not stripped?)" )
+#define EINVAL_EOF __einfo_error ( EINFO_EINVAL_EOF )
+#define EINFO_EINVAL_EOF \
+ __einfo_uniqify ( EINFO_EINVAL, 0x04, "Invalid EoF delimiter" )
+
+/** An FCoE port */
+struct fcoe_port {
+ /** Reference count */
+ struct refcnt refcnt;
+ /** List of FCoE ports */
+ struct list_head list;
+ /** Transport interface */
+ struct interface transport;
+ /** Network device */
+ struct net_device *netdev;
+
+ /** Node WWN */
+ union fcoe_name node_wwn;
+ /** Port WWN */
+ union fcoe_name port_wwn;
+
+ /** FIP retransmission timer */
+ struct retry_timer timer;
+ /** FIP timeout counter */
+ unsigned int timeouts;
+ /** Flags */
+ unsigned int flags;
+ /** FCoE forwarder priority */
+ unsigned int priority;
+ /** Keepalive delay (in ms) */
+ unsigned int keepalive;
+ /** FCoE forwarder MAC address */
+ uint8_t fcf_mac[ETH_ALEN];
+ /** Local MAC address */
+ uint8_t local_mac[ETH_ALEN];
+};
+
+/** FCoE flags */
+enum fcoe_flags {
+ /** Underlying network device is available */
+ FCOE_HAVE_NETWORK = 0x0001,
+ /** We have selected an FCoE forwarder to use */
+ FCOE_HAVE_FCF = 0x0002,
+ /** We have a FIP-capable FCoE forwarder available to be used */
+ FCOE_HAVE_FIP_FCF = 0x0004,
+ /** FCoE forwarder supports server-provided MAC addresses */
+ FCOE_FCF_ALLOWS_SPMA = 0x0008,
+ /** An alternative VLAN has been found */
+ FCOE_VLAN_FOUND = 0x0010,
+ /** VLAN discovery has timed out */
+ FCOE_VLAN_TIMED_OUT = 0x0020,
+};
+
+struct net_protocol fcoe_protocol __net_protocol;
+struct net_protocol fip_protocol __net_protocol;
+
+/** FCoE All-FCoE-MACs address */
+static uint8_t all_fcoe_macs[ETH_ALEN] =
+ { 0x01, 0x10, 0x18, 0x01, 0x00, 0x00 };
+
+/** FCoE All-ENode-MACs address */
+static uint8_t all_enode_macs[ETH_ALEN] =
+ { 0x01, 0x10, 0x18, 0x01, 0x00, 0x01 };
+
+/** FCoE All-FCF-MACs address */
+static uint8_t all_fcf_macs[ETH_ALEN] =
+ { 0x01, 0x10, 0x18, 0x01, 0x00, 0x02 };
+
+/** Default FCoE forwarded MAC address */
+static uint8_t default_fcf_mac[ETH_ALEN] =
+ { 0x0e, 0xfc, 0x00, 0xff, 0xff, 0xfe };
+
+/** Maximum number of VLAN requests before giving up on VLAN discovery */
+#define FCOE_MAX_VLAN_REQUESTS 2
+
+/** Delay between retrying VLAN requests */
+#define FCOE_VLAN_RETRY_DELAY ( TICKS_PER_SEC )
+
+/** Delay between retrying polling VLAN requests */
+#define FCOE_VLAN_POLL_DELAY ( 30 * TICKS_PER_SEC )
+
+/** Maximum number of FIP solicitations before giving up on FIP */
+#define FCOE_MAX_FIP_SOLICITATIONS 2
+
+/** Delay between retrying FIP solicitations */
+#define FCOE_FIP_RETRY_DELAY ( TICKS_PER_SEC )
+
+/** Maximum number of missing discovery advertisements */
+#define FCOE_MAX_FIP_MISSING_KEEPALIVES 4
+
+/** List of FCoE ports */
+static LIST_HEAD ( fcoe_ports );
+
+/******************************************************************************
+ *
+ * FCoE protocol
+ *
+ ******************************************************************************
+ */
+
+/**
+ * Identify FCoE port by network device
+ *
+ * @v netdev Network device
+ * @ret fcoe FCoE port, or NULL
+ */
+static struct fcoe_port * fcoe_demux ( struct net_device *netdev ) {
+ struct fcoe_port *fcoe;
+
+ list_for_each_entry ( fcoe, &fcoe_ports, list ) {
+ if ( fcoe->netdev == netdev )
+ return fcoe;
+ }
+ return NULL;
+}
+
+/**
+ * Reset FCoE port
+ *
+ * @v fcoe FCoE port
+ */
+static void fcoe_reset ( struct fcoe_port *fcoe ) {
+
+ /* Detach FC port, if any */
+ intf_restart ( &fcoe->transport, -ECANCELED );
+
+ /* Reset any FIP state */
+ stop_timer ( &fcoe->timer );
+ fcoe->timeouts = 0;
+ fcoe->flags = 0;
+ fcoe->priority = ( FIP_LOWEST_PRIORITY + 1 );
+ fcoe->keepalive = 0;
+ memcpy ( fcoe->fcf_mac, default_fcf_mac,
+ sizeof ( fcoe->fcf_mac ) );
+ memcpy ( fcoe->local_mac, fcoe->netdev->ll_addr,
+ sizeof ( fcoe->local_mac ) );
+
+ /* Start FIP solicitation if network is available */
+ if ( netdev_is_open ( fcoe->netdev ) &&
+ netdev_link_ok ( fcoe->netdev ) ) {
+ fcoe->flags |= FCOE_HAVE_NETWORK;
+ start_timer_nodelay ( &fcoe->timer );
+ DBGC ( fcoe, "FCoE %s starting %s\n", fcoe->netdev->name,
+ ( vlan_can_be_trunk ( fcoe->netdev ) ?
+ "VLAN discovery" : "FIP solicitation" ) );
+ }
+
+ /* Send notification of window change */
+ xfer_window_changed ( &fcoe->transport );
+}
+
+/**
+ * Transmit FCoE packet
+ *
+ * @v fcoe FCoE port
+ * @v iobuf I/O buffer
+ * @v meta Data transfer metadata
+ * @ret rc Return status code
+ */
+static int fcoe_deliver ( struct fcoe_port *fcoe,
+ struct io_buffer *iobuf,
+ struct xfer_metadata *meta __unused ) {
+ struct fc_frame_header *fchdr = iobuf->data;
+ struct fc_els_frame_common *els = ( iobuf->data + sizeof ( *fchdr ) );
+ struct fcoe_header *fcoehdr;
+ struct fcoe_footer *fcoeftr;
+ struct fip_header *fiphdr;
+ struct fip_login *fipflogi;
+ struct fip_mac_address *fipmac;
+ uint32_t crc;
+ struct net_protocol *net_protocol;
+ void *ll_source;
+ int rc;
+
+ /* Send as FIP or FCoE as appropriate */
+ if ( ( fchdr->r_ctl == ( FC_R_CTL_ELS | FC_R_CTL_UNSOL_CTRL ) ) &&
+ ( els->command == FC_ELS_FLOGI ) &&
+ ( fcoe->flags & FCOE_HAVE_FIP_FCF ) ) {
+
+ /* Create FIP FLOGI descriptor */
+ fipflogi = iob_push ( iobuf,
+ offsetof ( typeof ( *fipflogi ), fc ) );
+ memset ( fipflogi, 0, offsetof ( typeof ( *fipflogi ), fc ) );
+ fipflogi->type = FIP_FLOGI;
+ fipflogi->len = ( iob_len ( iobuf ) / 4 );
+
+ /* Create FIP MAC address descriptor */
+ fipmac = iob_put ( iobuf, sizeof ( *fipmac ) );
+ memset ( fipmac, 0, sizeof ( *fipmac ) );
+ fipmac->type = FIP_MAC_ADDRESS;
+ fipmac->len = ( sizeof ( *fipmac ) / 4 );
+ if ( fcoe->flags & FCOE_FCF_ALLOWS_SPMA ) {
+ memcpy ( fipmac->mac, fcoe->netdev->ll_addr,
+ sizeof ( fipmac->mac ) );
+ }
+
+ /* Create FIP header */
+ fiphdr = iob_push ( iobuf, sizeof ( *fiphdr ) );
+ memset ( fiphdr, 0, sizeof ( *fiphdr ) );
+ fiphdr->version = FIP_VERSION;
+ fiphdr->code = htons ( FIP_CODE_ELS );
+ fiphdr->subcode = FIP_ELS_REQUEST;
+ fiphdr->len =
+ htons ( ( iob_len ( iobuf ) - sizeof ( *fiphdr ) ) / 4);
+ fiphdr->flags = ( ( fcoe->flags & FCOE_FCF_ALLOWS_SPMA ) ?
+ htons ( FIP_SP ) : htons ( FIP_FP ) );
+
+ /* Send as FIP packet from netdev's own MAC address */
+ net_protocol = &fip_protocol;
+ ll_source = fcoe->netdev->ll_addr;
+
+ } else {
+
+ /* Calculate CRC */
+ crc = crc32_le ( ~((uint32_t)0), iobuf->data,
+ iob_len ( iobuf ) );
+
+ /* Create FCoE header */
+ fcoehdr = iob_push ( iobuf, sizeof ( *fcoehdr ) );
+ memset ( fcoehdr, 0, sizeof ( *fcoehdr ) );
+ fcoehdr->sof = ( ( fchdr->seq_cnt == ntohs ( 0 ) ) ?
+ FCOE_SOF_I3 : FCOE_SOF_N3 );
+
+ /* Create FCoE footer */
+ fcoeftr = iob_put ( iobuf, sizeof ( *fcoeftr ) );
+ memset ( fcoeftr, 0, sizeof ( *fcoeftr ) );
+ fcoeftr->crc = cpu_to_le32 ( crc ^ ~((uint32_t)0) );
+ fcoeftr->eof = ( ( fchdr->f_ctl_es & FC_F_CTL_ES_END ) ?
+ FCOE_EOF_T : FCOE_EOF_N );
+
+ /* Send as FCoE packet from FCoE MAC address */
+ net_protocol = &fcoe_protocol;
+ ll_source = fcoe->local_mac;
+ }
+
+ /* Transmit packet */
+ if ( ( rc = net_tx ( iob_disown ( iobuf ), fcoe->netdev, net_protocol,
+ fcoe->fcf_mac, ll_source ) ) != 0 ) {
+ DBGC ( fcoe, "FCoE %s could not transmit: %s\n",
+ fcoe->netdev->name, strerror ( rc ) );
+ goto done;
+ }
+
+ done:
+ free_iob ( iobuf );
+ return rc;
+}
+
+/**
+ * Allocate FCoE I/O buffer
+ *
+ * @v len Payload length
+ * @ret iobuf I/O buffer, or NULL
+ */
+static struct io_buffer * fcoe_alloc_iob ( struct fcoe_port *fcoe __unused,
+ size_t len ) {
+ struct io_buffer *iobuf;
+
+ iobuf = alloc_iob ( MAX_LL_HEADER_LEN + sizeof ( struct fcoe_header ) +
+ len + sizeof ( struct fcoe_footer ) );
+ if ( iobuf ) {
+ iob_reserve ( iobuf, ( MAX_LL_HEADER_LEN +
+ sizeof ( struct fcoe_header ) ) );
+ }
+ return iobuf;
+}
+
+/**
+ * Process incoming FCoE packets
+ *
+ * @v iobuf I/O buffer
+ * @v netdev 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 fcoe_rx ( struct io_buffer *iobuf, struct net_device *netdev,
+ const void *ll_dest, const void *ll_source,
+ unsigned int flags __unused ) {
+ struct fcoe_header *fcoehdr;
+ struct fcoe_footer *fcoeftr;
+ struct fcoe_port *fcoe;
+ int rc;
+
+ /* Identify FCoE port */
+ if ( ( fcoe = fcoe_demux ( netdev ) ) == NULL ) {
+ DBG ( "FCoE received frame for net device %s missing FCoE "
+ "port\n", netdev->name );
+ rc = -ENOTCONN;
+ goto done;
+ }
+
+ /* Discard packets not destined for us */
+ if ( ( memcmp ( fcoe->local_mac, ll_dest,
+ sizeof ( fcoe->local_mac ) ) != 0 ) &&
+ ( memcmp ( default_fcf_mac, ll_dest,
+ sizeof ( default_fcf_mac ) ) != 0 ) ) {
+ DBGC2 ( fcoe, "FCoE %s ignoring packet for %s\n",
+ fcoe->netdev->name, eth_ntoa ( ll_dest ) );
+ rc = -ENOTCONN;
+ goto done;
+ }
+
+ /* Sanity check */
+ if ( iob_len ( iobuf ) < ( sizeof ( *fcoehdr ) + sizeof ( *fcoeftr ) )){
+ DBGC ( fcoe, "FCoE %s received under-length frame (%zd "
+ "bytes)\n", fcoe->netdev->name, iob_len ( iobuf ) );
+ rc = -EINVAL_UNDERLENGTH;
+ goto done;
+ }
+
+ /* Strip header and footer */
+ fcoehdr = iobuf->data;
+ iob_pull ( iobuf, sizeof ( *fcoehdr ) );
+ fcoeftr = ( iobuf->data + iob_len ( iobuf ) - sizeof ( *fcoeftr ) );
+ iob_unput ( iobuf, sizeof ( *fcoeftr ) );
+
+ /* Validity checks */
+ if ( fcoehdr->version != FCOE_FRAME_VER ) {
+ DBGC ( fcoe, "FCoE %s received unsupported frame version "
+ "%02x\n", fcoe->netdev->name, fcoehdr->version );
+ rc = -EPROTONOSUPPORT;
+ goto done;
+ }
+ if ( ! ( ( fcoehdr->sof == FCOE_SOF_I3 ) ||
+ ( fcoehdr->sof == FCOE_SOF_N3 ) ) ) {
+ DBGC ( fcoe, "FCoE %s received unsupported start-of-frame "
+ "delimiter %02x\n", fcoe->netdev->name, fcoehdr->sof );
+ rc = -EINVAL_SOF;
+ goto done;
+ }
+ if ( ( le32_to_cpu ( fcoeftr->crc ) ^ ~((uint32_t)0) ) !=
+ crc32_le ( ~((uint32_t)0), iobuf->data, iob_len ( iobuf ) ) ) {
+ DBGC ( fcoe, "FCoE %s received invalid CRC\n",
+ fcoe->netdev->name );
+ rc = -EINVAL_CRC;
+ goto done;
+ }
+ if ( ! ( ( fcoeftr->eof == FCOE_EOF_N ) ||
+ ( fcoeftr->eof == FCOE_EOF_T ) ) ) {
+ DBGC ( fcoe, "FCoE %s received unsupported end-of-frame "
+ "delimiter %02x\n", fcoe->netdev->name, fcoeftr->eof );
+ rc = -EINVAL_EOF;
+ goto done;
+ }
+
+ /* Record FCF address if applicable */
+ if ( ( fcoe->flags & FCOE_HAVE_FCF ) &&
+ ( ! ( fcoe->flags & FCOE_HAVE_FIP_FCF ) ) ) {
+ memcpy ( &fcoe->fcf_mac, ll_source, sizeof ( fcoe->fcf_mac ) );
+ }
+
+ /* Hand off via transport interface */
+ if ( ( rc = xfer_deliver_iob ( &fcoe->transport,
+ iob_disown ( iobuf ) ) ) != 0 ) {
+ DBGC ( fcoe, "FCoE %s could not deliver frame: %s\n",
+ fcoe->netdev->name, strerror ( rc ) );
+ goto done;
+ }
+
+ done:
+ free_iob ( iobuf );
+ return rc;
+}
+
+/**
+ * Check FCoE flow control window
+ *
+ * @v fcoe FCoE port
+ * @ret len Length of window
+ */
+static size_t fcoe_window ( struct fcoe_port *fcoe ) {
+ return ( ( fcoe->flags & FCOE_HAVE_FCF ) ? ~( ( size_t ) 0 ) : 0 );
+}
+
+/**
+ * Close FCoE port
+ *
+ * @v fcoe FCoE port
+ * @v rc Reason for close
+ */
+static void fcoe_close ( struct fcoe_port *fcoe, int rc ) {
+
+ stop_timer ( &fcoe->timer );
+ intf_shutdown ( &fcoe->transport, rc );
+ netdev_put ( fcoe->netdev );
+ list_del ( &fcoe->list );
+ ref_put ( &fcoe->refcnt );
+}
+
+/**
+ * Identify device underlying FCoE port
+ *
+ * @v fcoe FCoE port
+ * @ret device Underlying device
+ */
+static struct device * fcoe_identify_device ( struct fcoe_port *fcoe ) {
+ return fcoe->netdev->dev;
+}
+
+/** FCoE transport interface operations */
+static struct interface_operation fcoe_transport_op[] = {
+ INTF_OP ( xfer_deliver, struct fcoe_port *, fcoe_deliver ),
+ INTF_OP ( xfer_alloc_iob, struct fcoe_port *, fcoe_alloc_iob ),
+ INTF_OP ( xfer_window, struct fcoe_port *, fcoe_window ),
+ INTF_OP ( intf_close, struct fcoe_port *, fcoe_close ),
+ INTF_OP ( identify_device, struct fcoe_port *,
+ fcoe_identify_device ),
+};
+
+/** FCoE transport interface descriptor */
+static struct interface_descriptor fcoe_transport_desc =
+ INTF_DESC ( struct fcoe_port, transport, fcoe_transport_op );
+
+/******************************************************************************
+ *
+ * FIP protocol
+ *
+ ******************************************************************************
+ */
+
+/**
+ * Parse FIP packet into descriptor set
+ *
+ * @v fcoe FCoE port
+ * @v fiphdr FIP header
+ * @v len Length of FIP packet
+ * @v descs Descriptor set to fill in
+ * @ret rc Return status code
+ */
+static int fcoe_fip_parse ( struct fcoe_port *fcoe, struct fip_header *fiphdr,
+ size_t len, struct fip_descriptors *descs ) {
+ union fip_descriptor *desc;
+ size_t descs_len;
+ size_t desc_len;
+ size_t desc_offset;
+ unsigned int desc_type;
+
+ /* Check FIP version */
+ if ( fiphdr->version != FIP_VERSION ) {
+ DBGC ( fcoe, "FCoE %s received unsupported FIP version %02x\n",
+ fcoe->netdev->name, fiphdr->version );
+ return -EINVAL;
+ }
+
+ /* Check length */
+ descs_len = ( ntohs ( fiphdr->len ) * 4 );
+ if ( ( sizeof ( *fiphdr ) + descs_len ) > len ) {
+ DBGC ( fcoe, "FCoE %s received bad descriptor list length\n",
+ fcoe->netdev->name );
+ return -EINVAL;
+ }
+
+ /* Parse descriptor list */
+ memset ( descs, 0, sizeof ( *descs ) );
+ for ( desc_offset = 0 ;
+ desc_offset <= ( descs_len - sizeof ( desc->common ) ) ;
+ desc_offset += desc_len ) {
+
+ /* Find descriptor and validate length */
+ desc = ( ( ( void * ) ( fiphdr + 1 ) ) + desc_offset );
+ desc_type = desc->common.type;
+ desc_len = ( desc->common.len * 4 );
+ if ( desc_len == 0 ) {
+ DBGC ( fcoe, "FCoE %s received zero-length "
+ "descriptor\n", fcoe->netdev->name );
+ return -EINVAL;
+ }
+ if ( ( desc_offset + desc_len ) > descs_len ) {
+ DBGC ( fcoe, "FCoE %s descriptor overrun\n",
+ fcoe->netdev->name );
+ return -EINVAL;
+ }
+
+ /* Handle descriptors that we understand */
+ if ( ( desc_type > FIP_RESERVED ) &&
+ ( desc_type < FIP_NUM_DESCRIPTOR_TYPES ) ) {
+ /* Use only the first instance of a descriptor */
+ if ( descs->desc[desc_type] == NULL )
+ descs->desc[desc_type] = desc;
+ continue;
+ }
+
+ /* Abort if we cannot understand a critical descriptor */
+ if ( FIP_IS_CRITICAL ( desc_type ) ) {
+ DBGC ( fcoe, "FCoE %s cannot understand critical "
+ "descriptor type %02x\n",
+ fcoe->netdev->name, desc_type );
+ return -ENOTSUP;
+ }
+
+ /* Ignore non-critical descriptors that we cannot understand */
+ }
+
+ return 0;
+}
+
+/**
+ * Send FIP VLAN request
+ *
+ * @v fcoe FCoE port
+ * @ret rc Return status code
+ */
+static int fcoe_fip_tx_vlan ( struct fcoe_port *fcoe ) {
+ struct io_buffer *iobuf;
+ struct {
+ struct fip_header hdr;
+ struct fip_mac_address mac_address;
+ } __attribute__ (( packed )) *request;
+ int rc;
+
+ /* Allocate I/O buffer */
+ iobuf = alloc_iob ( MAX_LL_HEADER_LEN + sizeof ( *request ) );
+ if ( ! iobuf )
+ return -ENOMEM;
+ iob_reserve ( iobuf, MAX_LL_HEADER_LEN );
+
+ /* Construct VLAN request */
+ request = iob_put ( iobuf, sizeof ( *request ) );
+ memset ( request, 0, sizeof ( *request ) );
+ request->hdr.version = FIP_VERSION;
+ request->hdr.code = htons ( FIP_CODE_VLAN );
+ request->hdr.subcode = FIP_VLAN_REQUEST;
+ request->hdr.len = htons ( ( sizeof ( *request ) -
+ sizeof ( request->hdr ) ) / 4 );
+ request->mac_address.type = FIP_MAC_ADDRESS;
+ request->mac_address.len =
+ ( sizeof ( request->mac_address ) / 4 );
+ memcpy ( request->mac_address.mac, fcoe->netdev->ll_addr,
+ sizeof ( request->mac_address.mac ) );
+
+ /* Send VLAN request */
+ if ( ( rc = net_tx ( iob_disown ( iobuf ), fcoe->netdev,
+ &fip_protocol, all_fcf_macs,
+ fcoe->netdev->ll_addr ) ) != 0 ) {
+ DBGC ( fcoe, "FCoE %s could not send VLAN request: "
+ "%s\n", fcoe->netdev->name, strerror ( rc ) );
+ return rc;
+ }
+
+ return 0;
+}
+
+/**
+ * Handle received FIP VLAN notification
+ *
+ * @v fcoe FCoE port
+ * @v descs Descriptor list
+ * @v flags Flags
+ * @ret rc Return status code
+ */
+static int fcoe_fip_rx_vlan ( struct fcoe_port *fcoe,
+ struct fip_descriptors *descs,
+ unsigned int flags __unused ) {
+ struct fip_mac_address *mac_address = fip_mac_address ( descs );
+ struct fip_vlan *vlan = fip_vlan ( descs );
+ unsigned int tag;
+ int rc;
+
+ /* Sanity checks */
+ if ( ! mac_address ) {
+ DBGC ( fcoe, "FCoE %s received VLAN notification missing MAC "
+ "address\n", fcoe->netdev->name );
+ return -EINVAL;
+ }
+ if ( ! vlan ) {
+ DBGC ( fcoe, "FCoE %s received VLAN notification missing VLAN "
+ "tag\n", fcoe->netdev->name );
+ return -EINVAL;
+ }
+
+ /* Create VLAN */
+ tag = ntohs ( vlan->vlan );
+ DBGC ( fcoe, "FCoE %s creating VLAN %d for FCF %s\n",
+ fcoe->netdev->name, tag, eth_ntoa ( mac_address->mac ) );
+ if ( ( rc = vlan_create ( fcoe->netdev, tag,
+ FCOE_VLAN_PRIORITY ) ) != 0 ) {
+ DBGC ( fcoe, "FCoE %s could not create VLAN %d: %s\n",
+ fcoe->netdev->name, tag, strerror ( rc ) );
+ return rc;
+ }
+
+ /* Record that a VLAN was found. This FCoE port will play no
+ * further active role; the real FCoE traffic will use the
+ * port automatically created for the new VLAN device.
+ */
+ fcoe->flags |= FCOE_VLAN_FOUND;
+
+ return 0;
+}
+
+/**
+ * Send FIP discovery solicitation
+ *
+ * @v fcoe FCoE port
+ * @ret rc Return status code
+ */
+static int fcoe_fip_tx_solicitation ( struct fcoe_port *fcoe ) {
+ struct io_buffer *iobuf;
+ struct {
+ struct fip_header hdr;
+ struct fip_mac_address mac_address;
+ struct fip_name_id name_id;
+ struct fip_max_fcoe_size max_fcoe_size;
+ } __attribute__ (( packed )) *solicitation;
+ int rc;
+
+ /* Allocate I/O buffer */
+ iobuf = alloc_iob ( MAX_LL_HEADER_LEN + sizeof ( *solicitation ) );
+ if ( ! iobuf )
+ return -ENOMEM;
+ iob_reserve ( iobuf, MAX_LL_HEADER_LEN );
+
+ /* Construct discovery solicitation */
+ solicitation = iob_put ( iobuf, sizeof ( *solicitation ) );
+ memset ( solicitation, 0, sizeof ( *solicitation ) );
+ solicitation->hdr.version = FIP_VERSION;
+ solicitation->hdr.code = htons ( FIP_CODE_DISCOVERY );
+ solicitation->hdr.subcode = FIP_DISCOVERY_SOLICIT;
+ solicitation->hdr.len = htons ( ( sizeof ( *solicitation ) -
+ sizeof ( solicitation->hdr ) ) / 4 );
+ solicitation->hdr.flags = htons ( FIP_FP | FIP_SP );
+ solicitation->mac_address.type = FIP_MAC_ADDRESS;
+ solicitation->mac_address.len =
+ ( sizeof ( solicitation->mac_address ) / 4 );
+ memcpy ( solicitation->mac_address.mac, fcoe->netdev->ll_addr,
+ sizeof ( solicitation->mac_address.mac ) );
+ solicitation->name_id.type = FIP_NAME_ID;
+ solicitation->name_id.len = ( sizeof ( solicitation->name_id ) / 4 );
+ memcpy ( &solicitation->name_id.name, &fcoe->node_wwn.fc,
+ sizeof ( solicitation->name_id.name ) );
+ solicitation->max_fcoe_size.type = FIP_MAX_FCOE_SIZE;
+ solicitation->max_fcoe_size.len =
+ ( sizeof ( solicitation->max_fcoe_size ) / 4 );
+ solicitation->max_fcoe_size.mtu =
+ htons ( ETH_MAX_MTU - sizeof ( struct fcoe_header ) -
+ sizeof ( struct fcoe_footer ) );
+
+ /* Send discovery solicitation */
+ if ( ( rc = net_tx ( iob_disown ( iobuf ), fcoe->netdev,
+ &fip_protocol, all_fcf_macs,
+ fcoe->netdev->ll_addr ) ) != 0 ) {
+ DBGC ( fcoe, "FCoE %s could not send discovery solicitation: "
+ "%s\n", fcoe->netdev->name, strerror ( rc ) );
+ return rc;
+ }
+
+ return 0;
+}
+
+/**
+ * Handle received FIP discovery advertisement
+ *
+ * @v fcoe FCoE port
+ * @v descs Descriptor list
+ * @v flags Flags
+ * @ret rc Return status code
+ */
+static int fcoe_fip_rx_advertisement ( struct fcoe_port *fcoe,
+ struct fip_descriptors *descs,
+ unsigned int flags ) {
+ struct fip_priority *priority = fip_priority ( descs );
+ struct fip_mac_address *mac_address = fip_mac_address ( descs );
+ struct fip_fka_adv_p *fka_adv_p = fip_fka_adv_p ( descs );
+
+ /* Sanity checks */
+ if ( ! priority ) {
+ DBGC ( fcoe, "FCoE %s received advertisement missing "
+ "priority\n", fcoe->netdev->name );
+ return -EINVAL;
+ }
+ if ( ! mac_address ) {
+ DBGC ( fcoe, "FCoE %s received advertisement missing MAC "
+ "address\n", fcoe->netdev->name );
+ return -EINVAL;
+ }
+ if ( ! fka_adv_p ) {
+ DBGC ( fcoe, "FCoE %s received advertisement missing FKA ADV "
+ "period\n", fcoe->netdev->name );
+ return -EINVAL;
+ }
+
+ if ( ! ( fcoe->flags & FCOE_HAVE_FCF ) ) {
+
+ /* We are soliciting for an FCF. Store the highest
+ * (i.e. lowest-valued) priority solicited
+ * advertisement that we receive.
+ */
+ if ( ( ( flags & ( FIP_A | FIP_S | FIP_F ) ) ==
+ ( FIP_A | FIP_S | FIP_F ) ) &&
+ ( priority->priority < fcoe->priority ) ) {
+
+ fcoe->flags |= FCOE_HAVE_FIP_FCF;
+ fcoe->priority = priority->priority;
+ if ( fka_adv_p->flags & FIP_NO_KEEPALIVE ) {
+ fcoe->keepalive = 0;
+ } else {
+ fcoe->keepalive = ntohl ( fka_adv_p->period );
+ }
+ fcoe->flags &= ~FCOE_FCF_ALLOWS_SPMA;
+ if ( flags & FIP_SP )
+ fcoe->flags |= FCOE_FCF_ALLOWS_SPMA;
+ memcpy ( fcoe->fcf_mac, mac_address->mac,
+ sizeof ( fcoe->fcf_mac ) );
+ DBGC ( fcoe, "FCoE %s selected FCF %s (pri %d",
+ fcoe->netdev->name, eth_ntoa ( fcoe->fcf_mac ),
+ fcoe->priority );
+ if ( fcoe->keepalive ) {
+ DBGC ( fcoe, ", FKA ADV %dms",
+ fcoe->keepalive );
+ }
+ DBGC ( fcoe, ", %cPMA)\n",
+ ( ( fcoe->flags & FCOE_FCF_ALLOWS_SPMA ) ?
+ 'S' : 'F' ) );
+ }
+
+ } else if ( fcoe->flags & FCOE_HAVE_FIP_FCF ) {
+
+ /* We are checking that the FCF remains alive. Reset
+ * the timeout counter if this is an advertisement
+ * from our forwarder.
+ */
+ if ( memcmp ( fcoe->fcf_mac, mac_address->mac,
+ sizeof ( fcoe->fcf_mac ) ) == 0 ) {
+ fcoe->timeouts = 0;
+ }
+
+ } else {
+
+ /* We are operating in non-FIP mode and have received
+ * a FIP advertisement. Reset the link in order to
+ * attempt FIP.
+ */
+ fcoe_reset ( fcoe );
+
+ }
+
+ return 0;
+}
+
+/**
+ * Handle received FIP ELS response
+ *
+ * @v fcoe FCoE port
+ * @v descs Descriptor list
+ * @v flags Flags
+ * @ret rc Return status code
+ */
+static int fcoe_fip_rx_els_response ( struct fcoe_port *fcoe,
+ struct fip_descriptors *descs,
+ unsigned int flags __unused ) {
+ struct fip_els *flogi = fip_flogi ( descs );
+ struct fip_mac_address *mac_address = fip_mac_address ( descs );
+ void *frame;
+ size_t frame_len;
+ int rc;
+
+ /* Sanity checks */
+ if ( ! flogi ) {
+ DBGC ( fcoe, "FCoE %s received ELS response missing FLOGI\n",
+ fcoe->netdev->name );
+ return -EINVAL;
+ }
+ if ( ! mac_address ) {
+ DBGC ( fcoe, "FCoE %s received ELS response missing MAC "
+ "address\n", fcoe->netdev->name );
+ return -EINVAL;
+ }
+
+ /* Record local MAC address */
+ memcpy ( fcoe->local_mac, mac_address->mac, sizeof ( fcoe->local_mac ));
+ DBGC ( fcoe, "FCoE %s using local MAC %s\n",
+ fcoe->netdev->name, eth_ntoa ( fcoe->local_mac ) );
+
+ /* Hand off via transport interface */
+ frame = &flogi->fc;
+ frame_len = ( ( flogi->len * 4 ) - offsetof ( typeof ( *flogi ), fc ) );
+ if ( ( rc = xfer_deliver_raw ( &fcoe->transport, frame,
+ frame_len ) ) != 0 ) {
+ DBGC ( fcoe, "FCoE %s could not deliver FIP FLOGI frame: %s\n",
+ fcoe->netdev->name, strerror ( rc ) );
+ return rc;
+ }
+
+ return 0;
+}
+
+/**
+ * Send FIP keepalive
+ *
+ * @v fcoe FCoE port
+ * @ret rc Return status code
+ */
+static int fcoe_fip_tx_keepalive ( struct fcoe_port *fcoe ) {
+ struct io_buffer *iobuf;
+ struct {
+ struct fip_header hdr;
+ struct fip_mac_address mac_address;
+ } __attribute__ (( packed )) *keepalive;
+ int rc;
+
+ /* Allocate I/O buffer */
+ iobuf = alloc_iob ( MAX_LL_HEADER_LEN + sizeof ( *keepalive ) );
+ if ( ! iobuf )
+ return -ENOMEM;
+ iob_reserve ( iobuf, MAX_LL_HEADER_LEN );
+
+ /* Construct keepalive */
+ keepalive = iob_put ( iobuf, sizeof ( *keepalive ) );
+ memset ( keepalive, 0, sizeof ( *keepalive ) );
+ keepalive->hdr.version = FIP_VERSION;
+ keepalive->hdr.code = htons ( FIP_CODE_MAINTAIN );
+ keepalive->hdr.subcode = FIP_MAINTAIN_KEEP_ALIVE;
+ keepalive->hdr.len = htons ( ( sizeof ( *keepalive ) -
+ sizeof ( keepalive->hdr ) ) / 4 );
+ keepalive->mac_address.type = FIP_MAC_ADDRESS;
+ keepalive->mac_address.len =
+ ( sizeof ( keepalive->mac_address ) / 4 );
+ memcpy ( keepalive->mac_address.mac, fcoe->netdev->ll_addr,
+ sizeof ( keepalive->mac_address.mac ) );
+
+ /* Send keepalive */
+ if ( ( rc = net_tx ( iob_disown ( iobuf ), fcoe->netdev,
+ &fip_protocol, fcoe->fcf_mac,
+ fcoe->netdev->ll_addr ) ) != 0 ) {
+ DBGC ( fcoe, "FCoE %s could not send keepalive: %s\n",
+ fcoe->netdev->name, strerror ( rc ) );
+ return rc;
+ }
+
+ return 0;
+}
+
+/** A FIP handler */
+struct fip_handler {
+ /** Protocol code */
+ uint16_t code;
+ /** Protocol subcode */
+ uint8_t subcode;
+ /**
+ * Receive FIP packet
+ *
+ * @v fcoe FCoE port
+ * @v descs Descriptor list
+ * @v flags Flags
+ * @ret rc Return status code
+ */
+ int ( * rx ) ( struct fcoe_port *fcoe, struct fip_descriptors *descs,
+ unsigned int flags );
+};
+
+/** FIP handlers */
+static struct fip_handler fip_handlers[] = {
+ { FIP_CODE_VLAN, FIP_VLAN_NOTIFY,
+ fcoe_fip_rx_vlan },
+ { FIP_CODE_DISCOVERY, FIP_DISCOVERY_ADVERTISE,
+ fcoe_fip_rx_advertisement },
+ { FIP_CODE_ELS, FIP_ELS_RESPONSE,
+ fcoe_fip_rx_els_response },
+};
+
+/**
+ * Process incoming FIP packets
+ *
+ * @v iobuf I/O buffer
+ * @v netdev 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 fcoe_fip_rx ( struct io_buffer *iobuf,
+ struct net_device *netdev,
+ const void *ll_dest,
+ const void *ll_source __unused,
+ unsigned int flags __unused ) {
+ struct fip_header *fiphdr = iobuf->data;
+ struct fip_descriptors descs;
+ struct fip_handler *handler;
+ struct fcoe_port *fcoe;
+ unsigned int i;
+ int rc;
+
+ /* Identify FCoE port */
+ if ( ( fcoe = fcoe_demux ( netdev ) ) == NULL ) {
+ DBG ( "FCoE received FIP frame for net device %s missing FCoE "
+ "port\n", netdev->name );
+ rc = -ENOTCONN;
+ goto done;
+ }
+
+ /* Discard packets not destined for us */
+ if ( ( memcmp ( fcoe->netdev->ll_addr, ll_dest, ETH_ALEN ) != 0 ) &&
+ ( memcmp ( all_fcoe_macs, ll_dest,
+ sizeof ( all_fcoe_macs ) ) != 0 ) &&
+ ( memcmp ( all_enode_macs, ll_dest,
+ sizeof ( all_enode_macs ) ) != 0 ) ) {
+ DBGC2 ( fcoe, "FCoE %s ignoring FIP packet for %s\n",
+ fcoe->netdev->name, eth_ntoa ( ll_dest ) );
+ rc = -ENOTCONN;
+ goto done;
+ }
+
+ /* Parse FIP packet */
+ if ( ( rc = fcoe_fip_parse ( fcoe, fiphdr, iob_len ( iobuf ),
+ &descs ) ) != 0 )
+ goto done;
+
+ /* Find a suitable handler */
+ for ( i = 0 ; i < ( sizeof ( fip_handlers ) /
+ sizeof ( fip_handlers[0] ) ) ; i++ ) {
+ handler = &fip_handlers[i];
+ if ( ( handler->code == ntohs ( fiphdr->code ) ) &&
+ ( handler->subcode == fiphdr->subcode ) ) {
+ rc = handler->rx ( fcoe, &descs,
+ ntohs ( fiphdr->flags ) );
+ goto done;
+ }
+ }
+ DBGC ( fcoe, "FCoE %s received unsupported FIP code %04x.%02x\n",
+ fcoe->netdev->name, ntohs ( fiphdr->code ), fiphdr->subcode );
+ rc = -ENOTSUP;
+
+ done:
+ free_iob ( iobuf );
+ return rc;
+}
+
+/******************************************************************************
+ *
+ * FCoE ports
+ *
+ ******************************************************************************
+ */
+
+/**
+ * Handle FCoE timer expiry
+ *
+ * @v timer FIP timer
+ * @v over Timer expired
+ */
+static void fcoe_expired ( struct retry_timer *timer, int over __unused ) {
+ struct fcoe_port *fcoe =
+ container_of ( timer, struct fcoe_port, timer );
+ int rc;
+
+ /* Sanity check */
+ assert ( fcoe->flags & FCOE_HAVE_NETWORK );
+
+ /* Increment the timeout counter */
+ fcoe->timeouts++;
+
+ if ( vlan_can_be_trunk ( fcoe->netdev ) &&
+ ! ( fcoe->flags & FCOE_VLAN_TIMED_OUT ) ) {
+
+ /* If we have already found a VLAN, send infrequent
+ * VLAN requests, in case VLAN information changes.
+ */
+ if ( fcoe->flags & FCOE_VLAN_FOUND ) {
+ fcoe->flags &= ~FCOE_VLAN_FOUND;
+ fcoe->timeouts = 0;
+ start_timer_fixed ( &fcoe->timer,
+ FCOE_VLAN_POLL_DELAY );
+ fcoe_fip_tx_vlan ( fcoe );
+ return;
+ }
+
+ /* If we have not yet found a VLAN, and we have not
+ * yet timed out and given up on finding one, then
+ * send a VLAN request and wait.
+ */
+ if ( fcoe->timeouts <= FCOE_MAX_VLAN_REQUESTS ) {
+ start_timer_fixed ( &fcoe->timer,
+ FCOE_VLAN_RETRY_DELAY );
+ fcoe_fip_tx_vlan ( fcoe );
+ return;
+ }
+
+ /* We have timed out waiting for a VLAN; proceed to
+ * FIP discovery.
+ */
+ fcoe->flags |= FCOE_VLAN_TIMED_OUT;
+ fcoe->timeouts = 0;
+ DBGC ( fcoe, "FCoE %s giving up on VLAN discovery\n",
+ fcoe->netdev->name );
+ start_timer_nodelay ( &fcoe->timer );
+
+ } else if ( ! ( fcoe->flags & FCOE_HAVE_FCF ) ) {
+
+ /* If we have not yet found a FIP-capable forwarder,
+ * and we have not yet timed out and given up on
+ * finding one, then send a FIP solicitation and wait.
+ */
+ start_timer_fixed ( &fcoe->timer, FCOE_FIP_RETRY_DELAY );
+ if ( ( ! ( fcoe->flags & FCOE_HAVE_FIP_FCF ) ) &&
+ ( fcoe->timeouts <= FCOE_MAX_FIP_SOLICITATIONS ) ) {
+ fcoe_fip_tx_solicitation ( fcoe );
+ return;
+ }
+
+ /* Attach Fibre Channel port */
+ if ( ( rc = fc_port_open ( &fcoe->transport, &fcoe->node_wwn.fc,
+ &fcoe->port_wwn.fc,
+ fcoe->netdev->name ) ) != 0 ) {
+ DBGC ( fcoe, "FCoE %s could not create FC port: %s\n",
+ fcoe->netdev->name, strerror ( rc ) );
+ /* We will try again on the next timer expiry */
+ return;
+ }
+ stop_timer ( &fcoe->timer );
+
+ /* Either we have found a FIP-capable forwarder, or we
+ * have timed out and will fall back to pre-FIP mode.
+ */
+ fcoe->flags |= FCOE_HAVE_FCF;
+ fcoe->timeouts = 0;
+ DBGC ( fcoe, "FCoE %s using %sFIP FCF %s\n", fcoe->netdev->name,
+ ( ( fcoe->flags & FCOE_HAVE_FIP_FCF ) ? "" : "non-" ),
+ eth_ntoa ( fcoe->fcf_mac ) );
+
+ /* Start sending keepalives if applicable */
+ if ( fcoe->keepalive )
+ start_timer_nodelay ( &fcoe->timer );
+
+ /* Send notification of window change */
+ xfer_window_changed ( &fcoe->transport );
+
+ } else {
+
+ /* Send keepalive */
+ start_timer_fixed ( &fcoe->timer,
+ ( ( fcoe->keepalive * TICKS_PER_SEC ) / 1000 ) );
+ fcoe_fip_tx_keepalive ( fcoe );
+
+ /* Abandon FCF if we have not seen its advertisements */
+ if ( fcoe->timeouts > FCOE_MAX_FIP_MISSING_KEEPALIVES ) {
+ DBGC ( fcoe, "FCoE %s abandoning FCF %s\n",
+ fcoe->netdev->name, eth_ntoa ( fcoe->fcf_mac ));
+ fcoe_reset ( fcoe );
+ }
+ }
+}
+
+/**
+ * Create FCoE port
+ *
+ * @v netdev Network device
+ * @ret rc Return status code
+ */
+static int fcoe_probe ( struct net_device *netdev ) {
+ struct ll_protocol *ll_protocol = netdev->ll_protocol;
+ struct fcoe_port *fcoe;
+ int rc;
+
+ /* Sanity check */
+ if ( ll_protocol->ll_proto != htons ( ARPHRD_ETHER ) ) {
+ /* Not an error; simply skip this net device */
+ DBG ( "FCoE skipping non-Ethernet device %s\n", netdev->name );
+ rc = 0;
+ goto err_non_ethernet;
+ }
+
+ /* Allocate and initialise structure */
+ fcoe = zalloc ( sizeof ( *fcoe ) );
+ if ( ! fcoe ) {
+ rc = -ENOMEM;
+ goto err_zalloc;
+ }
+ ref_init ( &fcoe->refcnt, NULL );
+ intf_init ( &fcoe->transport, &fcoe_transport_desc, &fcoe->refcnt );
+ timer_init ( &fcoe->timer, fcoe_expired, &fcoe->refcnt );
+ fcoe->netdev = netdev_get ( netdev );
+
+ /* Construct node and port names */
+ fcoe->node_wwn.fcoe.authority = htons ( FCOE_AUTHORITY_IEEE );
+ memcpy ( &fcoe->node_wwn.fcoe.mac, netdev->ll_addr,
+ sizeof ( fcoe->node_wwn.fcoe.mac ) );
+ fcoe->port_wwn.fcoe.authority = htons ( FCOE_AUTHORITY_IEEE_EXTENDED );
+ memcpy ( &fcoe->port_wwn.fcoe.mac, netdev->ll_addr,
+ sizeof ( fcoe->port_wwn.fcoe.mac ) );
+
+ DBGC ( fcoe, "FCoE %s is %s", fcoe->netdev->name,
+ fc_ntoa ( &fcoe->node_wwn.fc ) );
+ DBGC ( fcoe, " port %s\n", fc_ntoa ( &fcoe->port_wwn.fc ) );
+
+ /* Transfer reference to port list */
+ list_add ( &fcoe->list, &fcoe_ports );
+ return 0;
+
+ netdev_put ( fcoe->netdev );
+ err_zalloc:
+ err_non_ethernet:
+ return rc;
+}
+
+/**
+ * Handle FCoE port device or link state change
+ *
+ * @v netdev Network device
+ */
+static void fcoe_notify ( struct net_device *netdev ) {
+ struct fcoe_port *fcoe;
+
+ /* Sanity check */
+ if ( ( fcoe = fcoe_demux ( netdev ) ) == NULL ) {
+ DBG ( "FCoE notification for net device %s missing FCoE "
+ "port\n", netdev->name );
+ return;
+ }
+
+ /* Reset the FCoE link if necessary */
+ if ( ! ( netdev_is_open ( netdev ) &&
+ netdev_link_ok ( netdev ) &&
+ ( fcoe->flags & FCOE_HAVE_NETWORK ) ) ) {
+ fcoe_reset ( fcoe );
+ }
+}
+
+/**
+ * Destroy FCoE port
+ *
+ * @v netdev Network device
+ */
+static void fcoe_remove ( struct net_device *netdev ) {
+ struct fcoe_port *fcoe;
+
+ /* Sanity check */
+ if ( ( fcoe = fcoe_demux ( netdev ) ) == NULL ) {
+ DBG ( "FCoE removal of net device %s missing FCoE port\n",
+ netdev->name );
+ return;
+ }
+
+ /* Close FCoE device */
+ fcoe_close ( fcoe, 0 );
+}
+
+/** FCoE driver */
+struct net_driver fcoe_driver __net_driver = {
+ .name = "FCoE",
+ .probe = fcoe_probe,
+ .notify = fcoe_notify,
+ .remove = fcoe_remove,
+};
+
+/** FCoE protocol */
+struct net_protocol fcoe_protocol __net_protocol = {
+ .name = "FCoE",
+ .net_proto = htons ( ETH_P_FCOE ),
+ .rx = fcoe_rx,
+};
+
+/** FIP protocol */
+struct net_protocol fip_protocol __net_protocol = {
+ .name = "FIP",
+ .net_proto = htons ( ETH_P_FIP ),
+ .rx = fcoe_fip_rx,
+};
+
+/** Human-readable message for CRC errors
+ *
+ * It seems as though several drivers neglect to strip the Ethernet
+ * CRC, which will cause the FCoE footer to be misplaced and result
+ * (coincidentally) in an "invalid CRC" error from FCoE.
+ */
+struct errortab fcoe_errors[] __errortab = {
+ __einfo_errortab ( EINFO_EINVAL_CRC ),
+};
Code Review / kvmfornfv.git / blobdiff