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[Qemu-devel] [PATCH v2 04/11] virtio-net, eth: use linux-headers


From: Michael S. Tsirkin
Subject: [Qemu-devel] [PATCH v2 04/11] virtio-net, eth: use linux-headers
Date: Sun, 26 May 2013 18:23:02 +0300

It's easier to keep everything virtio in sync if
we just use headers exported from linux kernel.
Import linux/virtio_net.h and linux/if_ether.h
that it depends on. Switch to symbols from
that header for stuff that was
duplicated in tap.h and eth.h

Signed-off-by: Michael S. Tsirkin <address@hidden>
---
 include/hw/virtio/virtio-net.h   | 141 +--------------------------
 include/net/eth.h                |   5 +-
 include/net/tap.h                |  24 +----
 linux-headers/linux/if_ether.h   | 140 +++++++++++++++++++++++++++
 linux-headers/linux/virtio_net.h | 202 +++++++++++++++++++++++++++++++++++++++
 5 files changed, 347 insertions(+), 165 deletions(-)
 create mode 100644 linux-headers/linux/if_ether.h
 create mode 100644 linux-headers/linux/virtio_net.h

diff --git a/include/hw/virtio/virtio-net.h b/include/hw/virtio/virtio-net.h
index b315ac9..65616c0 100644
--- a/include/hw/virtio/virtio-net.h
+++ b/include/hw/virtio/virtio-net.h
@@ -16,46 +16,13 @@
 
 #include "hw/virtio/virtio.h"
 #include "hw/pci/pci.h"
+#include "linux/virtio_net.h"
+#include "linux/virtio_ids.h"
 
 #define TYPE_VIRTIO_NET "virtio-net-device"
 #define VIRTIO_NET(obj) \
         OBJECT_CHECK(VirtIONet, (obj), TYPE_VIRTIO_NET)
 
-#define ETH_ALEN    6
-
-/* from Linux's virtio_net.h */
-
-/* The ID for virtio_net */
-#define VIRTIO_ID_NET   1
-
-/* The feature bitmap for virtio net */
-#define VIRTIO_NET_F_CSUM       0       /* Host handles pkts w/ partial csum */
-#define VIRTIO_NET_F_GUEST_CSUM 1       /* Guest handles pkts w/ partial csum 
*/
-#define VIRTIO_NET_F_CTRL_GUEST_OFFLOADS 2 /* Control channel offload
-                                         * configuration support */
-#define VIRTIO_NET_F_MAC        5       /* Host has given MAC address. */
-#define VIRTIO_NET_F_GSO        6       /* Host handles pkts w/ any GSO type */
-#define VIRTIO_NET_F_GUEST_TSO4 7       /* Guest can handle TSOv4 in. */
-#define VIRTIO_NET_F_GUEST_TSO6 8       /* Guest can handle TSOv6 in. */
-#define VIRTIO_NET_F_GUEST_ECN  9       /* Guest can handle TSO[6] w/ ECN in. 
*/
-#define VIRTIO_NET_F_GUEST_UFO  10      /* Guest can handle UFO in. */
-#define VIRTIO_NET_F_HOST_TSO4  11      /* Host can handle TSOv4 in. */
-#define VIRTIO_NET_F_HOST_TSO6  12      /* Host can handle TSOv6 in. */
-#define VIRTIO_NET_F_HOST_ECN   13      /* Host can handle TSO[6] w/ ECN in. */
-#define VIRTIO_NET_F_HOST_UFO   14      /* Host can handle UFO in. */
-#define VIRTIO_NET_F_MRG_RXBUF  15      /* Host can merge receive buffers. */
-#define VIRTIO_NET_F_STATUS     16      /* virtio_net_config.status available 
*/
-#define VIRTIO_NET_F_CTRL_VQ    17      /* Control channel available */
-#define VIRTIO_NET_F_CTRL_RX    18      /* Control channel RX mode support */
-#define VIRTIO_NET_F_CTRL_VLAN  19      /* Control channel VLAN filtering */
-#define VIRTIO_NET_F_CTRL_RX_EXTRA 20   /* Extra RX mode control support */
-#define VIRTIO_NET_F_MQ         22      /* Device supports Receive Flow
-                                         * Steering */
-
-#define VIRTIO_NET_F_CTRL_MAC_ADDR   23 /* Set MAC address */
-
-#define VIRTIO_NET_S_LINK_UP    1       /* Link is up */
-
 #define TX_TIMER_INTERVAL 150000 /* 150 us */
 
 /* Limit the number of packets that can be sent via a single flush
@@ -75,72 +42,6 @@ typedef struct virtio_net_conf
 /* Maximum packet size we can receive from tap device: header + 64k */
 #define VIRTIO_NET_MAX_BUFSIZE (sizeof(struct virtio_net_hdr) + (64 << 10))
 
-struct virtio_net_config
-{
-    /* The config defining mac address ($ETH_ALEN bytes) */
-    uint8_t mac[ETH_ALEN];
-    /* See VIRTIO_NET_F_STATUS and VIRTIO_NET_S_* above */
-    uint16_t status;
-    /* Max virtqueue pairs supported by the device */
-    uint16_t max_virtqueue_pairs;
-} QEMU_PACKED;
-
-/*
- * Control virtqueue data structures
- *
- * The control virtqueue expects a header in the first sg entry
- * and an ack/status response in the last entry.  Data for the
- * command goes in between.
- */
-struct virtio_net_ctrl_hdr {
-    uint8_t class;
-    uint8_t cmd;
-};
-
-typedef uint8_t virtio_net_ctrl_ack;
-
-#define VIRTIO_NET_OK     0
-#define VIRTIO_NET_ERR    1
-
-/*
- * Control the RX mode, ie. promisucous, allmulti, etc...
- * All commands require an "out" sg entry containing a 1 byte
- * state value, zero = disable, non-zero = enable.  Commands
- * 0 and 1 are supported with the VIRTIO_NET_F_CTRL_RX feature.
- * Commands 2-5 are added with VIRTIO_NET_F_CTRL_RX_EXTRA.
- */
-#define VIRTIO_NET_CTRL_RX    0
- #define VIRTIO_NET_CTRL_RX_PROMISC      0
- #define VIRTIO_NET_CTRL_RX_ALLMULTI     1
- #define VIRTIO_NET_CTRL_RX_ALLUNI       2
- #define VIRTIO_NET_CTRL_RX_NOMULTI      3
- #define VIRTIO_NET_CTRL_RX_NOUNI        4
- #define VIRTIO_NET_CTRL_RX_NOBCAST      5
-
-/*
- * Control the MAC
- *
- * The MAC filter table is managed by the hypervisor, the guest should
- * assume the size is infinite.  Filtering should be considered
- * non-perfect, ie. based on hypervisor resources, the guest may
- * received packets from sources not specified in the filter list.
- *
- * In addition to the class/cmd header, the TABLE_SET command requires
- * two out scatterlists.  Each contains a 4 byte count of entries followed
- * by a concatenated byte stream of the ETH_ALEN MAC addresses.  The
- * first sg list contains unicast addresses, the second is for multicast.
- * This functionality is present if the VIRTIO_NET_F_CTRL_RX feature
- * is available.
- *
- * The ADDR_SET command requests one out scatterlist, it contains a
- * 6 bytes MAC address. This functionality is present if the
- * VIRTIO_NET_F_CTRL_MAC_ADDR feature is available.
- */
-struct virtio_net_ctrl_mac {
-    uint32_t entries;
-    uint8_t macs[][ETH_ALEN];
-};
-
 typedef struct VirtIONetQueue {
     VirtQueue *rx_vq;
     VirtQueue *tx_vq;
@@ -195,43 +96,7 @@ typedef struct VirtIONet {
     uint64_t curr_guest_offloads;
 } VirtIONet;
 
-#define VIRTIO_NET_CTRL_MAC    1
- #define VIRTIO_NET_CTRL_MAC_TABLE_SET        0
- #define VIRTIO_NET_CTRL_MAC_ADDR_SET         1
-
-/*
- * Control VLAN filtering
- *
- * The VLAN filter table is controlled via a simple ADD/DEL interface.
- * VLAN IDs not added may be filterd by the hypervisor.  Del is the
- * opposite of add.  Both commands expect an out entry containing a 2
- * byte VLAN ID.  VLAN filterting is available with the
- * VIRTIO_NET_F_CTRL_VLAN feature bit.
- */
-#define VIRTIO_NET_CTRL_VLAN       2
- #define VIRTIO_NET_CTRL_VLAN_ADD             0
- #define VIRTIO_NET_CTRL_VLAN_DEL             1
-
-/*
- * Control Multiqueue
- *
- * The command VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET
- * enables multiqueue, specifying the number of the transmit and
- * receive queues that will be used. After the command is consumed and acked by
- * the device, the device will not steer new packets on receive virtqueues
- * other than specified nor read from transmit virtqueues other than specified.
- * Accordingly, driver should not transmit new packets  on virtqueues other 
than
- * specified.
- */
-struct virtio_net_ctrl_mq {
-    uint16_t virtqueue_pairs;
-};
-
-#define VIRTIO_NET_CTRL_MQ   4
- #define VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET        0
- #define VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MIN        1
- #define VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MAX        0x8000
-
+#define VIRTIO_NET_F_CTRL_GUEST_OFFLOADS 2 /* Guest offload control */
 /*
  * Control network offloads
  *
diff --git a/include/net/eth.h b/include/net/eth.h
index 1d48e06..6102394 100644
--- a/include/net/eth.h
+++ b/include/net/eth.h
@@ -26,13 +26,12 @@
 #ifndef QEMU_ETH_H
 #define QEMU_ETH_H
 
+#include <linux/if_ether.h>
 #include <sys/types.h>
 #include <string.h>
 #include "qemu/bswap.h"
 #include "qemu/iov.h"
 
-#define ETH_ALEN 6
-
 struct eth_header {
     uint8_t  h_dest[ETH_ALEN];   /* destination eth addr */
     uint8_t  h_source[ETH_ALEN]; /* source ether addr    */
@@ -170,8 +169,6 @@ struct tcp_hdr {
 #define IP_HEADER_VERSION(ip)     \
     ((ip->ip_ver_len >> 4)&0xf)
 
-#define ETH_P_IP                  (0x0800)
-#define ETH_P_IPV6                (0x86dd)
 #define ETH_P_VLAN                (0x8100)
 #define ETH_P_DVLAN               (0x88a8)
 #define VLAN_VID_MASK             0x0fff
diff --git a/include/net/tap.h b/include/net/tap.h
index a994f20..2eff653 100644
--- a/include/net/tap.h
+++ b/include/net/tap.h
@@ -28,6 +28,7 @@
 
 #include "qemu-common.h"
 #include "qapi-types.h"
+#include "linux/virtio_net.h"
 
 bool tap_has_ufo(NetClientState *nc);
 int tap_has_vnet_hdr(NetClientState *nc);
@@ -43,27 +44,4 @@ int tap_get_fd(NetClientState *nc);
 struct vhost_net;
 struct vhost_net *tap_get_vhost_net(NetClientState *nc);
 
-struct virtio_net_hdr
-{
-#define VIRTIO_NET_HDR_F_NEEDS_CSUM     1       // Use csum_start, csum_offset
-#define VIRTIO_NET_HDR_F_DATA_VALID    2       // Csum is valid
-    uint8_t flags;
-#define VIRTIO_NET_HDR_GSO_NONE         0       // Not a GSO frame
-#define VIRTIO_NET_HDR_GSO_TCPV4        1       // GSO frame, IPv4 TCP (TSO)
-#define VIRTIO_NET_HDR_GSO_UDP          3       // GSO frame, IPv4 UDP (UFO)
-#define VIRTIO_NET_HDR_GSO_TCPV6        4       // GSO frame, IPv6 TCP
-#define VIRTIO_NET_HDR_GSO_ECN          0x80    // TCP has ECN set
-    uint8_t gso_type;
-    uint16_t hdr_len;
-    uint16_t gso_size;
-    uint16_t csum_start;
-    uint16_t csum_offset;
-};
-
-struct virtio_net_hdr_mrg_rxbuf
-{
-    struct virtio_net_hdr hdr;
-    uint16_t num_buffers;   /* Number of merged rx buffers */
-};
-
 #endif /* QEMU_NET_TAP_H */
diff --git a/linux-headers/linux/if_ether.h b/linux-headers/linux/if_ether.h
new file mode 100644
index 0000000..2fc760a
--- /dev/null
+++ b/linux-headers/linux/if_ether.h
@@ -0,0 +1,140 @@
+/*
+ * INET                An implementation of the TCP/IP protocol suite for the 
LINUX
+ *             operating system.  INET is implemented using the  BSD Socket
+ *             interface as the means of communication with the user level.
+ *
+ *             Global definitions for the Ethernet IEEE 802.3 interface.
+ *
+ * Version:    @(#)if_ether.h  1.0.1a  02/08/94
+ *
+ * Author:     Fred N. van Kempen, <address@hidden>
+ *             Donald Becker, <address@hidden>
+ *             Alan Cox, <address@hidden>
+ *             Steve Whitehouse, <address@hidden>
+ *
+ *             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 (at your option) any later version.
+ */
+
+#ifndef _LINUX_IF_ETHER_H
+#define _LINUX_IF_ETHER_H
+
+#include <linux/types.h>
+
+/*
+ *     IEEE 802.3 Ethernet magic constants.  The frame sizes omit the preamble
+ *     and FCS/CRC (frame check sequence).
+ */
+
+#define ETH_ALEN       6               /* Octets in one ethernet addr   */
+#define ETH_HLEN       14              /* Total octets in header.       */
+#define ETH_ZLEN       60              /* Min. octets in frame sans FCS */
+#define ETH_DATA_LEN   1500            /* Max. octets in payload        */
+#define ETH_FRAME_LEN  1514            /* Max. octets in frame sans FCS */
+#define ETH_FCS_LEN    4               /* Octets in the FCS             */
+
+/*
+ *     These are the defined Ethernet Protocol ID's.
+ */
+
+#define ETH_P_LOOP     0x0060          /* Ethernet Loopback packet     */
+#define ETH_P_PUP      0x0200          /* Xerox PUP packet             */
+#define ETH_P_PUPAT    0x0201          /* Xerox PUP Addr Trans packet  */
+#define ETH_P_IP       0x0800          /* Internet Protocol packet     */
+#define ETH_P_X25      0x0805          /* CCITT X.25                   */
+#define ETH_P_ARP      0x0806          /* Address Resolution packet    */
+#define        ETH_P_BPQ       0x08FF          /* G8BPQ AX.25 Ethernet Packet  
[ NOT AN OFFICIALLY REGISTERED ID ] */
+#define ETH_P_IEEEPUP  0x0a00          /* Xerox IEEE802.3 PUP packet */
+#define ETH_P_IEEEPUPAT        0x0a01          /* Xerox IEEE802.3 PUP Addr 
Trans packet */
+#define ETH_P_BATMAN   0x4305          /* B.A.T.M.A.N.-Advanced packet [ NOT 
AN OFFICIALLY REGISTERED ID ] */
+#define ETH_P_DEC       0x6000          /* DEC Assigned proto           */
+#define ETH_P_DNA_DL    0x6001          /* DEC DNA Dump/Load            */
+#define ETH_P_DNA_RC    0x6002          /* DEC DNA Remote Console       */
+#define ETH_P_DNA_RT    0x6003          /* DEC DNA Routing              */
+#define ETH_P_LAT       0x6004          /* DEC LAT                      */
+#define ETH_P_DIAG      0x6005          /* DEC Diagnostics              */
+#define ETH_P_CUST      0x6006          /* DEC Customer use             */
+#define ETH_P_SCA       0x6007          /* DEC Systems Comms Arch       */
+#define ETH_P_TEB      0x6558          /* Trans Ether Bridging         */
+#define ETH_P_RARP      0x8035         /* Reverse Addr Res packet      */
+#define ETH_P_ATALK    0x809B          /* Appletalk DDP                */
+#define ETH_P_AARP     0x80F3          /* Appletalk AARP               */
+#define ETH_P_8021Q    0x8100          /* 802.1Q VLAN Extended Header  */
+#define ETH_P_IPX      0x8137          /* IPX over DIX                 */
+#define ETH_P_IPV6     0x86DD          /* IPv6 over bluebook           */
+#define ETH_P_PAUSE    0x8808          /* IEEE Pause frames. See 802.3 31B */
+#define ETH_P_SLOW     0x8809          /* Slow Protocol. See 802.3ad 43B */
+#define ETH_P_WCCP     0x883E          /* Web-cache coordination protocol
+                                        * defined in 
draft-wilson-wrec-wccp-v2-00.txt */
+#define ETH_P_PPP_DISC 0x8863          /* PPPoE discovery messages     */
+#define ETH_P_PPP_SES  0x8864          /* PPPoE session messages       */
+#define ETH_P_MPLS_UC  0x8847          /* MPLS Unicast traffic         */
+#define ETH_P_MPLS_MC  0x8848          /* MPLS Multicast traffic       */
+#define ETH_P_ATMMPOA  0x884c          /* MultiProtocol Over ATM       */
+#define ETH_P_LINK_CTL 0x886c          /* HPNA, wlan link local tunnel */
+#define ETH_P_ATMFATE  0x8884          /* Frame-based ATM Transport
+                                        * over Ethernet
+                                        */
+#define ETH_P_PAE      0x888E          /* Port Access Entity (IEEE 802.1X) */
+#define ETH_P_AOE      0x88A2          /* ATA over Ethernet            */
+#define ETH_P_8021AD   0x88A8          /* 802.1ad Service VLAN         */
+#define ETH_P_802_EX1  0x88B5          /* 802.1 Local Experimental 1.  */
+#define ETH_P_TIPC     0x88CA          /* TIPC                         */
+#define ETH_P_8021AH   0x88E7          /* 802.1ah Backbone Service Tag */
+#define ETH_P_MVRP     0x88F5          /* 802.1Q MVRP                  */
+#define ETH_P_1588     0x88F7          /* IEEE 1588 Timesync */
+#define ETH_P_FCOE     0x8906          /* Fibre Channel over Ethernet  */
+#define ETH_P_TDLS     0x890D          /* TDLS */
+#define ETH_P_FIP      0x8914          /* FCoE Initialization Protocol */
+#define ETH_P_QINQ1    0x9100          /* deprecated QinQ VLAN [ NOT AN 
OFFICIALLY REGISTERED ID ] */
+#define ETH_P_QINQ2    0x9200          /* deprecated QinQ VLAN [ NOT AN 
OFFICIALLY REGISTERED ID ] */
+#define ETH_P_QINQ3    0x9300          /* deprecated QinQ VLAN [ NOT AN 
OFFICIALLY REGISTERED ID ] */
+#define ETH_P_EDSA     0xDADA          /* Ethertype DSA [ NOT AN OFFICIALLY 
REGISTERED ID ] */
+#define ETH_P_AF_IUCV   0xFBFB         /* IBM af_iucv [ NOT AN OFFICIALLY 
REGISTERED ID ] */
+
+#define ETH_P_802_3_MIN        0x0600          /* If the value in the ethernet 
type is less than this value
+                                        * then the frame is Ethernet II. Else 
it is 802.3 */
+
+/*
+ *     Non DIX types. Won't clash for 1500 types.
+ */
+
+#define ETH_P_802_3    0x0001          /* Dummy type for 802.3 frames  */
+#define ETH_P_AX25     0x0002          /* Dummy protocol id for AX.25  */
+#define ETH_P_ALL      0x0003          /* Every packet (be careful!!!) */
+#define ETH_P_802_2    0x0004          /* 802.2 frames                 */
+#define ETH_P_SNAP     0x0005          /* Internal only                */
+#define ETH_P_DDCMP     0x0006          /* DEC DDCMP: Internal only     */
+#define ETH_P_WAN_PPP   0x0007          /* Dummy type for WAN PPP frames*/
+#define ETH_P_PPP_MP    0x0008          /* Dummy type for PPP MP frames */
+#define ETH_P_LOCALTALK 0x0009         /* Localtalk pseudo type        */
+#define ETH_P_CAN      0x000C          /* CAN: Controller Area Network */
+#define ETH_P_CANFD    0x000D          /* CANFD: CAN flexible data rate*/
+#define ETH_P_PPPTALK  0x0010          /* Dummy type for Atalk over PPP*/
+#define ETH_P_TR_802_2 0x0011          /* 802.2 frames                 */
+#define ETH_P_MOBITEX  0x0015          /* Mobitex (address@hidden)     */
+#define ETH_P_CONTROL  0x0016          /* Card specific control frames */
+#define ETH_P_IRDA     0x0017          /* Linux-IrDA                   */
+#define ETH_P_ECONET   0x0018          /* Acorn Econet                 */
+#define ETH_P_HDLC     0x0019          /* HDLC frames                  */
+#define ETH_P_ARCNET   0x001A          /* 1A for ArcNet :-)            */
+#define ETH_P_DSA      0x001B          /* Distributed Switch Arch.     */
+#define ETH_P_TRAILER  0x001C          /* Trailer switch tagging       */
+#define ETH_P_PHONET   0x00F5          /* Nokia Phonet frames          */
+#define ETH_P_IEEE802154 0x00F6                /* IEEE802.15.4 frame           
*/
+#define ETH_P_CAIF     0x00F7          /* ST-Ericsson CAIF protocol    */
+
+/*
+ *     This is an Ethernet frame header.
+ */
+
+struct ethhdr {
+       unsigned char   h_dest[ETH_ALEN];       /* destination eth addr */
+       unsigned char   h_source[ETH_ALEN];     /* source ether addr    */
+       __be16          h_proto;                /* packet type ID field */
+} __attribute__((packed));
+
+
+#endif /* _LINUX_IF_ETHER_H */
diff --git a/linux-headers/linux/virtio_net.h b/linux-headers/linux/virtio_net.h
new file mode 100644
index 0000000..c520203
--- /dev/null
+++ b/linux-headers/linux/virtio_net.h
@@ -0,0 +1,202 @@
+#ifndef _LINUX_VIRTIO_NET_H
+#define _LINUX_VIRTIO_NET_H
+/* This header is BSD licensed so anyone can use the definitions to implement
+ * compatible drivers/servers.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of IBM nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS 
IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL IBM OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE. */
+#include <linux/types.h>
+#include <linux/virtio_ids.h>
+#include <linux/virtio_config.h>
+#include <linux/if_ether.h>
+
+/* The feature bitmap for virtio net */
+#define VIRTIO_NET_F_CSUM      0       /* Host handles pkts w/ partial csum */
+#define VIRTIO_NET_F_GUEST_CSUM        1       /* Guest handles pkts w/ 
partial csum */
+#define VIRTIO_NET_F_MAC       5       /* Host has given MAC address. */
+#define VIRTIO_NET_F_GSO       6       /* Host handles pkts w/ any GSO type */
+#define VIRTIO_NET_F_GUEST_TSO4        7       /* Guest can handle TSOv4 in. */
+#define VIRTIO_NET_F_GUEST_TSO6        8       /* Guest can handle TSOv6 in. */
+#define VIRTIO_NET_F_GUEST_ECN 9       /* Guest can handle TSO[6] w/ ECN in. */
+#define VIRTIO_NET_F_GUEST_UFO 10      /* Guest can handle UFO in. */
+#define VIRTIO_NET_F_HOST_TSO4 11      /* Host can handle TSOv4 in. */
+#define VIRTIO_NET_F_HOST_TSO6 12      /* Host can handle TSOv6 in. */
+#define VIRTIO_NET_F_HOST_ECN  13      /* Host can handle TSO[6] w/ ECN in. */
+#define VIRTIO_NET_F_HOST_UFO  14      /* Host can handle UFO in. */
+#define VIRTIO_NET_F_MRG_RXBUF 15      /* Host can merge receive buffers. */
+#define VIRTIO_NET_F_STATUS    16      /* virtio_net_config.status available */
+#define VIRTIO_NET_F_CTRL_VQ   17      /* Control channel available */
+#define VIRTIO_NET_F_CTRL_RX   18      /* Control channel RX mode support */
+#define VIRTIO_NET_F_CTRL_VLAN 19      /* Control channel VLAN filtering */
+#define VIRTIO_NET_F_CTRL_RX_EXTRA 20  /* Extra RX mode control support */
+#define VIRTIO_NET_F_GUEST_ANNOUNCE 21 /* Guest can announce device on the
+                                        * network */
+#define VIRTIO_NET_F_MQ        22      /* Device supports Receive Flow
+                                        * Steering */
+#define VIRTIO_NET_F_CTRL_MAC_ADDR 23  /* Set MAC address */
+
+#define VIRTIO_NET_S_LINK_UP   1       /* Link is up */
+#define VIRTIO_NET_S_ANNOUNCE  2       /* Announcement is needed */
+
+struct virtio_net_config {
+       /* The config defining mac address (if VIRTIO_NET_F_MAC) */
+       __u8 mac[6];
+       /* See VIRTIO_NET_F_STATUS and VIRTIO_NET_S_* above */
+       __u16 status;
+       /* Maximum number of each of transmit and receive queues;
+        * see VIRTIO_NET_F_MQ and VIRTIO_NET_CTRL_MQ.
+        * Legal values are between 1 and 0x8000
+        */
+       __u16 max_virtqueue_pairs;
+} __attribute__((packed));
+
+/* This is the first element of the scatter-gather list.  If you don't
+ * specify GSO or CSUM features, you can simply ignore the header. */
+struct virtio_net_hdr {
+#define VIRTIO_NET_HDR_F_NEEDS_CSUM    1       // Use csum_start, csum_offset
+#define VIRTIO_NET_HDR_F_DATA_VALID    2       // Csum is valid
+       __u8 flags;
+#define VIRTIO_NET_HDR_GSO_NONE                0       // Not a GSO frame
+#define VIRTIO_NET_HDR_GSO_TCPV4       1       // GSO frame, IPv4 TCP (TSO)
+#define VIRTIO_NET_HDR_GSO_UDP         3       // GSO frame, IPv4 UDP (UFO)
+#define VIRTIO_NET_HDR_GSO_TCPV6       4       // GSO frame, IPv6 TCP
+#define VIRTIO_NET_HDR_GSO_ECN         0x80    // TCP has ECN set
+       __u8 gso_type;
+       __u16 hdr_len;          /* Ethernet + IP + tcp/udp hdrs */
+       __u16 gso_size;         /* Bytes to append to hdr_len per frame */
+       __u16 csum_start;       /* Position to start checksumming from */
+       __u16 csum_offset;      /* Offset after that to place checksum */
+};
+
+/* This is the version of the header to use when the MRG_RXBUF
+ * feature has been negotiated. */
+struct virtio_net_hdr_mrg_rxbuf {
+       struct virtio_net_hdr hdr;
+       __u16 num_buffers;      /* Number of merged rx buffers */
+};
+
+/*
+ * Control virtqueue data structures
+ *
+ * The control virtqueue expects a header in the first sg entry
+ * and an ack/status response in the last entry.  Data for the
+ * command goes in between.
+ */
+struct virtio_net_ctrl_hdr {
+       __u8 class;
+       __u8 cmd;
+} __attribute__((packed));
+
+typedef __u8 virtio_net_ctrl_ack;
+
+#define VIRTIO_NET_OK     0
+#define VIRTIO_NET_ERR    1
+
+/*
+ * Control the RX mode, ie. promisucous, allmulti, etc...
+ * All commands require an "out" sg entry containing a 1 byte
+ * state value, zero = disable, non-zero = enable.  Commands
+ * 0 and 1 are supported with the VIRTIO_NET_F_CTRL_RX feature.
+ * Commands 2-5 are added with VIRTIO_NET_F_CTRL_RX_EXTRA.
+ */
+#define VIRTIO_NET_CTRL_RX    0
+ #define VIRTIO_NET_CTRL_RX_PROMISC      0
+ #define VIRTIO_NET_CTRL_RX_ALLMULTI     1
+ #define VIRTIO_NET_CTRL_RX_ALLUNI       2
+ #define VIRTIO_NET_CTRL_RX_NOMULTI      3
+ #define VIRTIO_NET_CTRL_RX_NOUNI        4
+ #define VIRTIO_NET_CTRL_RX_NOBCAST      5
+
+/*
+ * Control the MAC
+ *
+ * The MAC filter table is managed by the hypervisor, the guest should
+ * assume the size is infinite.  Filtering should be considered
+ * non-perfect, ie. based on hypervisor resources, the guest may
+ * received packets from sources not specified in the filter list.
+ *
+ * In addition to the class/cmd header, the TABLE_SET command requires
+ * two out scatterlists.  Each contains a 4 byte count of entries followed
+ * by a concatenated byte stream of the ETH_ALEN MAC addresses.  The
+ * first sg list contains unicast addresses, the second is for multicast.
+ * This functionality is present if the VIRTIO_NET_F_CTRL_RX feature
+ * is available.
+ *
+ * The ADDR_SET command requests one out scatterlist, it contains a
+ * 6 bytes MAC address. This functionality is present if the
+ * VIRTIO_NET_F_CTRL_MAC_ADDR feature is available.
+ */
+struct virtio_net_ctrl_mac {
+       __u32 entries;
+       __u8 macs[][ETH_ALEN];
+} __attribute__((packed));
+
+#define VIRTIO_NET_CTRL_MAC    1
+ #define VIRTIO_NET_CTRL_MAC_TABLE_SET        0
+ #define VIRTIO_NET_CTRL_MAC_ADDR_SET         1
+
+/*
+ * Control VLAN filtering
+ *
+ * The VLAN filter table is controlled via a simple ADD/DEL interface.
+ * VLAN IDs not added may be filterd by the hypervisor.  Del is the
+ * opposite of add.  Both commands expect an out entry containing a 2
+ * byte VLAN ID.  VLAN filterting is available with the
+ * VIRTIO_NET_F_CTRL_VLAN feature bit.
+ */
+#define VIRTIO_NET_CTRL_VLAN       2
+ #define VIRTIO_NET_CTRL_VLAN_ADD             0
+ #define VIRTIO_NET_CTRL_VLAN_DEL             1
+
+/*
+ * Control link announce acknowledgement
+ *
+ * The command VIRTIO_NET_CTRL_ANNOUNCE_ACK is used to indicate that
+ * driver has recevied the notification; device would clear the
+ * VIRTIO_NET_S_ANNOUNCE bit in the status field after it receives
+ * this command.
+ */
+#define VIRTIO_NET_CTRL_ANNOUNCE       3
+ #define VIRTIO_NET_CTRL_ANNOUNCE_ACK         0
+
+/*
+ * Control Receive Flow Steering
+ *
+ * The command VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET
+ * enables Receive Flow Steering, specifying the number of the transmit and
+ * receive queues that will be used. After the command is consumed and acked by
+ * the device, the device will not steer new packets on receive virtqueues
+ * other than specified nor read from transmit virtqueues other than specified.
+ * Accordingly, driver should not transmit new packets  on virtqueues other 
than
+ * specified.
+ */
+struct virtio_net_ctrl_mq {
+       __u16 virtqueue_pairs;
+};
+
+#define VIRTIO_NET_CTRL_MQ   4
+ #define VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET        0
+ #define VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MIN        1
+ #define VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MAX        0x8000
+
+#endif /* _LINUX_VIRTIO_NET_H */
-- 
MST



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