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libxl: prevent attaching multiple netdevs with the same MAC

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It will not be possible to detach such device later. Also improve
logging in such cases.

Signed-off-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
This commit is contained in:
Marek Marczykowski-Górecki 2015-03-06 15:36:16 +01:00 committed by Jim Fehlig
parent ed4db85a55
commit 1a01a2aa57
1 changed files with 15 additions and 0 deletions
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15
src/libxl/libxl_driver.c
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@ -2780,6 +2780,7 @@ libxlDomainAttachNetDevice(libxlDriverPrivatePtr driver,
int actualType;
libxl_device_nic nic;
int ret = -1;
char mac[VIR_MAC_STRING_BUFLEN];
/* preallocate new slot for device */
if (VIR_REALLOC_N(vm->def->nets, vm->def->nnets + 1) < 0)
@ -2794,6 +2795,13 @@ libxlDomainAttachNetDevice(libxlDriverPrivatePtr driver,
actualType = virDomainNetGetActualType(net);
if (virDomainHasNet(vm->def, net)) {
virReportError(VIR_ERR_INVALID_ARG,
_("network device with mac %s already exists"),
virMacAddrFormat(&net->mac, mac));
return -1;
}
if (actualType == VIR_DOMAIN_NET_TYPE_HOSTDEV) {
/* This is really a "smart hostdev", so it should be attached
* as a hostdev (the hostdev code will reach over into the
@ -2872,6 +2880,7 @@ libxlDomainAttachDeviceConfig(virDomainDefPtr vmdef, virDomainDeviceDefPtr dev)
virDomainHostdevDefPtr hostdev;
virDomainHostdevDefPtr found;
virDomainHostdevSubsysPCIPtr pcisrc;
char mac[VIR_MAC_STRING_BUFLEN];
switch (dev->type) {
case VIR_DOMAIN_DEVICE_DISK:
@ -2889,6 +2898,12 @@ libxlDomainAttachDeviceConfig(virDomainDefPtr vmdef, virDomainDeviceDefPtr dev)
case VIR_DOMAIN_DEVICE_NET:
net = dev->data.net;
if (virDomainHasNet(vmdef, net)) {
virReportError(VIR_ERR_INVALID_ARG,
_("network device with mac %s already exists"),
virMacAddrFormat(&net->mac, mac));
return -1;
}
if (virDomainNetInsert(vmdef, net))
return -1;
dev->data.net = NULL;