33226236a3
While in former patch we enabled GUEST_ANNOUNCE feature, so that the guest OS will broadcast a GARP message after migration to notify the switch about the new location of migrated VM, the thing is that GUEST_ANNOUNCE is enabled since kernel v3.5 only. For older kernel, VHOST_USER_SEND_RARP request comes to rescue. The payload of this new request is the mac address of the migrated VM, with that, we could construct a RARP message, and then broadcast it to host interfaces. That's how this patch works: - list all interfaces, with the help of SIOCGIFCONF ioctl command - construct an RARP message and broadcast it Cc: Thibaut Collet <thibaut.collet@6wind.com> Signed-off-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
118 lines
3.8 KiB
C
118 lines
3.8 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _VHOST_NET_USER_H
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#define _VHOST_NET_USER_H
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#include <stdint.h>
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#include <linux/vhost.h>
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#include "rte_virtio_net.h"
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#include "fd_man.h"
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struct vhost_server {
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char *path; /**< The path the uds is bind to. */
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int listenfd; /**< The listener sockfd. */
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};
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/* refer to hw/virtio/vhost-user.c */
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typedef enum VhostUserRequest {
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VHOST_USER_NONE = 0,
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VHOST_USER_GET_FEATURES = 1,
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VHOST_USER_SET_FEATURES = 2,
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VHOST_USER_SET_OWNER = 3,
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VHOST_USER_RESET_OWNER = 4,
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VHOST_USER_SET_MEM_TABLE = 5,
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VHOST_USER_SET_LOG_BASE = 6,
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VHOST_USER_SET_LOG_FD = 7,
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VHOST_USER_SET_VRING_NUM = 8,
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VHOST_USER_SET_VRING_ADDR = 9,
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VHOST_USER_SET_VRING_BASE = 10,
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VHOST_USER_GET_VRING_BASE = 11,
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VHOST_USER_SET_VRING_KICK = 12,
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VHOST_USER_SET_VRING_CALL = 13,
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VHOST_USER_SET_VRING_ERR = 14,
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VHOST_USER_GET_PROTOCOL_FEATURES = 15,
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VHOST_USER_SET_PROTOCOL_FEATURES = 16,
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VHOST_USER_GET_QUEUE_NUM = 17,
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VHOST_USER_SET_VRING_ENABLE = 18,
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VHOST_USER_SEND_RARP = 19,
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VHOST_USER_MAX
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} VhostUserRequest;
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typedef struct VhostUserMemoryRegion {
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uint64_t guest_phys_addr;
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uint64_t memory_size;
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uint64_t userspace_addr;
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uint64_t mmap_offset;
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} VhostUserMemoryRegion;
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typedef struct VhostUserMemory {
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uint32_t nregions;
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uint32_t padding;
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VhostUserMemoryRegion regions[VHOST_MEMORY_MAX_NREGIONS];
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} VhostUserMemory;
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typedef struct VhostUserLog {
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uint64_t mmap_size;
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uint64_t mmap_offset;
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} VhostUserLog;
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typedef struct VhostUserMsg {
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VhostUserRequest request;
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#define VHOST_USER_VERSION_MASK 0x3
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#define VHOST_USER_REPLY_MASK (0x1 << 2)
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uint32_t flags;
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uint32_t size; /* the following payload size */
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union {
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#define VHOST_USER_VRING_IDX_MASK 0xff
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#define VHOST_USER_VRING_NOFD_MASK (0x1<<8)
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uint64_t u64;
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struct vhost_vring_state state;
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struct vhost_vring_addr addr;
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VhostUserMemory memory;
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VhostUserLog log;
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} payload;
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int fds[VHOST_MEMORY_MAX_NREGIONS];
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} __attribute((packed)) VhostUserMsg;
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#define VHOST_USER_HDR_SIZE offsetof(VhostUserMsg, payload.u64)
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/* The version of the protocol we support */
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#define VHOST_USER_VERSION 0x1
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/*****************************************************************************/
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#endif
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