mirror of
https://gitlab.com/libvirt/libvirt.git
synced 2024-12-23 06:05:27 +00:00
qemu: process: detect if dimm aliases are broken on reconnect
Detect on reconnect to a running qemu VM whether the alias of a hotpluggable memory device (dimm) does not match the dimm slot number where it's connected to. This is necessary as qemu is actually considering the alias as machine ABI used to connect the backend object to the dimm device. This will require us to keep them consistent so that we can reliably restore them on migration. In some situations it was currently possible to create a mismatched configuration and qemu would refuse to restore the migration stream. To avoid breaking existing VMs we'll need to keep the old algorithm though.
This commit is contained in:
parent
810e9a8061
commit
93d9ff3da0
@ -232,6 +232,9 @@ struct _qemuDomainObjPrivate {
|
|||||||
/* private XML) - need to restore at process reconnect */
|
/* private XML) - need to restore at process reconnect */
|
||||||
uint8_t *masterKey;
|
uint8_t *masterKey;
|
||||||
size_t masterKeyLen;
|
size_t masterKeyLen;
|
||||||
|
|
||||||
|
/* note whether memory device alias does not correspond to slot number */
|
||||||
|
bool memAliasOrderMismatch;
|
||||||
};
|
};
|
||||||
|
|
||||||
# define QEMU_DOMAIN_PRIVATE(vm) \
|
# define QEMU_DOMAIN_PRIVATE(vm) \
|
||||||
|
@ -3205,6 +3205,29 @@ qemuDomainPerfRestart(virDomainObjPtr vm)
|
|||||||
return 0;
|
return 0;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|
||||||
|
static void
|
||||||
|
qemuProcessReconnectCheckMemAliasOrderMismatch(virDomainObjPtr vm)
|
||||||
|
{
|
||||||
|
size_t i;
|
||||||
|
int aliasidx;
|
||||||
|
virDomainDefPtr def = vm->def;
|
||||||
|
qemuDomainObjPrivatePtr priv = vm->privateData;
|
||||||
|
|
||||||
|
if (!virDomainDefHasMemoryHotplug(def) || def->nmems == 0)
|
||||||
|
return;
|
||||||
|
|
||||||
|
for (i = 0; i < def->nmems; i++) {
|
||||||
|
aliasidx = qemuDomainDeviceAliasIndex(&def->mems[i]->info, "dimm");
|
||||||
|
|
||||||
|
if (def->mems[i]->info.addr.dimm.slot != aliasidx) {
|
||||||
|
priv->memAliasOrderMismatch = true;
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
struct qemuProcessReconnectData {
|
struct qemuProcessReconnectData {
|
||||||
virConnectPtr conn;
|
virConnectPtr conn;
|
||||||
virQEMUDriverPtr driver;
|
virQEMUDriverPtr driver;
|
||||||
@ -3389,6 +3412,8 @@ qemuProcessReconnect(void *opaque)
|
|||||||
if (qemuProcessUpdateDevices(driver, obj) < 0)
|
if (qemuProcessUpdateDevices(driver, obj) < 0)
|
||||||
goto error;
|
goto error;
|
||||||
|
|
||||||
|
qemuProcessReconnectCheckMemAliasOrderMismatch(obj);
|
||||||
|
|
||||||
/* Failure to connect to agent shouldn't be fatal */
|
/* Failure to connect to agent shouldn't be fatal */
|
||||||
if ((ret = qemuConnectAgent(driver, obj)) < 0) {
|
if ((ret = qemuConnectAgent(driver, obj)) < 0) {
|
||||||
if (ret == -2)
|
if (ret == -2)
|
||||||
|
Loading…
Reference in New Issue
Block a user