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[Qemu-devel] [PATCH 23/37] qemu-bridge-helper: force usage of a very hig
From: |
Michael Roth |
Subject: |
[Qemu-devel] [PATCH 23/37] qemu-bridge-helper: force usage of a very high MAC address for the bridge |
Date: |
Tue, 2 Apr 2013 16:45:28 -0500 |
From: Paolo Bonzini <address@hidden>
Linux uses the lowest enslaved MAC address as the MAC address of
the bridge. Set MAC address to a high value so that it does not
affect the MAC address of the bridge.
Changing the MAC address of the bridge could cause a few seconds
of network downtime.
Cc: address@hidden
Signed-off-by: Paolo Bonzini <address@hidden>
Message-id: address@hidden
Signed-off-by: Anthony Liguori <address@hidden>
(cherry picked from commit 226ecabfbd410c7b2041385ea4b6f083a09ce8a2)
Signed-off-by: Michael Roth <address@hidden>
---
qemu-bridge-helper.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/qemu-bridge-helper.c b/qemu-bridge-helper.c
index 287bfd5..6a0974e 100644
--- a/qemu-bridge-helper.c
+++ b/qemu-bridge-helper.c
@@ -367,6 +367,24 @@ int main(int argc, char **argv)
goto cleanup;
}
+ /* Linux uses the lowest enslaved MAC address as the MAC address of
+ * the bridge. Set MAC address to a high value so that it doesn't
+ * affect the MAC address of the bridge.
+ */
+ if (ioctl(ctlfd, SIOCGIFHWADDR, &ifr) < 0) {
+ fprintf(stderr, "failed to get MAC address of device `%s': %s\n",
+ iface, strerror(errno));
+ ret = EXIT_FAILURE;
+ goto cleanup;
+ }
+ ifr.ifr_hwaddr.sa_data[0] = 0xFE;
+ if (ioctl(ctlfd, SIOCSIFHWADDR, &ifr) < 0) {
+ fprintf(stderr, "failed to set MAC address of device `%s': %s\n",
+ iface, strerror(errno));
+ ret = EXIT_FAILURE;
+ goto cleanup;
+ }
+
/* add the interface to the bridge */
prep_ifreq(&ifr, bridge);
ifindex = if_nametoindex(iface);
--
1.7.9.5
- [Qemu-devel] [PATCH 13/37] scsi: do not call scsi_read_data/scsi_write_data for a canceled request, (continued)
- [Qemu-devel] [PATCH 13/37] scsi: do not call scsi_read_data/scsi_write_data for a canceled request, Michael Roth, 2013/04/02
- [Qemu-devel] [PATCH 14/37] scsi-disk: do not complete canceled UNMAP requests, Michael Roth, 2013/04/02
- [Qemu-devel] [PATCH 15/37] rtc-test: Fix test failures with recent glib, Michael Roth, 2013/04/02
- [Qemu-devel] [PATCH 16/37] Allow virtio-net features for legacy s390 virtio bus, Michael Roth, 2013/04/02
- [Qemu-devel] [PATCH 17/37] pseries: Add compatible property to root of device tree, Michael Roth, 2013/04/02
- [Qemu-devel] [PATCH 18/37] qcow2: make is_allocated return true for zero clusters, Michael Roth, 2013/04/02
- [Qemu-devel] [PATCH 19/37] qemu-ga: use key-value store to avoid recycling fd handles after restart, Michael Roth, 2013/04/02
- [Qemu-devel] [PATCH 21/37] tcg: Fix occasional TCG broken problem when ldst optimization enabled, Michael Roth, 2013/04/02
- [Qemu-devel] [PATCH 22/37] virtio-ccw: Queue sanity check for notify hypercall., Michael Roth, 2013/04/02
- [Qemu-devel] [PATCH 20/37] qga/main.c: Don't use g_key_file_get/set_int64, Michael Roth, 2013/04/02
- [Qemu-devel] [PATCH 23/37] qemu-bridge-helper: force usage of a very high MAC address for the bridge,
Michael Roth <=
- [Qemu-devel] [PATCH 24/37] configure: Require at least spice-protocol-0.12.3, Michael Roth, 2013/04/02
- [Qemu-devel] [PATCH 25/37] pseries: Add cleanup hook for PAPR virtual LAN device, Michael Roth, 2013/04/02
- [Qemu-devel] [PATCH 26/37] target-ppc: Fix CPU_POWERPC_MPC8547E, Michael Roth, 2013/04/02
- [Qemu-devel] [PATCH 27/37] ide/macio: Fix macio DMA initialisation., Michael Roth, 2013/04/02
- [Qemu-devel] [PATCH 28/37] virtio-blk: fix unplug + virsh reboot, Michael Roth, 2013/04/02
- [Qemu-devel] [PATCH 35/37] linux-user: make bogus negative iovec lengths fail EINVAL, Michael Roth, 2013/04/02
- [Qemu-devel] [PATCH 34/37] linux-user: fix futex strace of FUTEX_CLOCK_REALTIME, Michael Roth, 2013/04/02
- [Qemu-devel] [PATCH 36/37] linux-user/syscall.c: Don't warn about unimplemented get_robust_list, Michael Roth, 2013/04/02
- [Qemu-devel] [PATCH 37/37] update seabios to 1.7.2.1, Michael Roth, 2013/04/02
- Re: [Qemu-devel] Patch Round-up for stable 1.4.1, freeze next Tuesday, Eric Blake, 2013/04/02