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qemu: Create NVMe disk in domain namespace

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If a domain has an NVMe disk configured, then we need to create
/dev/vfio/* paths in domain's namespace so that qemu can open
them.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Cole Robinson <crobinso@redhat.com>
This commit is contained in:
Michal Privoznik 2019-06-21 15:28:24 +02:00
parent d3f06dcdb5
commit a80ebd2a2a
1 changed files with 51 additions and 16 deletions
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67
src/qemu/qemu_domain.c
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@ -14391,16 +14391,29 @@ qemuDomainSetupDisk(virQEMUDriverConfigPtr cfg G_GNUC_UNUSED,
{
virStorageSourcePtr next;
char *dst = NULL;
bool hasNVMe = false;
int ret = -1;
for (next = disk->src; virStorageSourceIsBacking(next); next = next->backingStore) {
if (!next->path || !virStorageSourceIsLocalStorage(next)) {
/* Not creating device. Just continue. */
continue;
}
if (next->type == VIR_STORAGE_TYPE_NVME) {
g_autofree char *nvmePath = NULL;
if (qemuDomainCreateDevice(next->path, data, false) < 0)
goto cleanup;
hasNVMe = true;
if (!(nvmePath = virPCIDeviceAddressGetIOMMUGroupDev(&next->nvme->pciAddr)))
goto cleanup;
if (qemuDomainCreateDevice(nvmePath, data, false) < 0)
goto cleanup;
} else {
if (!next->path || !virStorageSourceIsLocalStorage(next)) {
/* Not creating device. Just continue. */
continue;
}
if (qemuDomainCreateDevice(next->path, data, false) < 0)
goto cleanup;
}
}
/* qemu-pr-helper might require access to /dev/mapper/control. */
@ -14408,6 +14421,10 @@ qemuDomainSetupDisk(virQEMUDriverConfigPtr cfg G_GNUC_UNUSED,
qemuDomainCreateDevice(QEMU_DEVICE_MAPPER_CONTROL_PATH, data, true) < 0)
goto cleanup;
if (hasNVMe &&
qemuDomainCreateDevice(QEMU_DEV_VFIO, data, false) < 0)
goto cleanup;
ret = 0;
cleanup:
VIR_FREE(dst);
@ -15422,19 +15439,32 @@ qemuDomainNamespaceSetupDisk(virDomainObjPtr vm,
virStorageSourcePtr src)
{
virStorageSourcePtr next;
const char **paths = NULL;
char **paths = NULL;
size_t npaths = 0;
char *dmPath = NULL;
bool hasNVMe = false;
g_autofree char *dmPath = NULL;
g_autofree char *vfioPath = NULL;
int ret = -1;
for (next = src; virStorageSourceIsBacking(next); next = next->backingStore) {
if (virStorageSourceIsEmpty(next) ||
!virStorageSourceIsLocalStorage(next)) {
/* Not creating device. Just continue. */
continue;
g_autofree char *tmpPath = NULL;
if (next->type == VIR_STORAGE_TYPE_NVME) {
hasNVMe = true;
if (!(tmpPath = virPCIDeviceAddressGetIOMMUGroupDev(&next->nvme->pciAddr)))
goto cleanup;
} else {
if (virStorageSourceIsEmpty(next) ||
!virStorageSourceIsLocalStorage(next)) {
/* Not creating device. Just continue. */
continue;
}
tmpPath = g_strdup(next->path);
}
if (VIR_APPEND_ELEMENT_COPY(paths, npaths, next->path) < 0)
if (VIR_APPEND_ELEMENT(paths, npaths, tmpPath) < 0)
goto cleanup;
}
@ -15445,13 +15475,18 @@ qemuDomainNamespaceSetupDisk(virDomainObjPtr vm,
goto cleanup;
}
if (qemuDomainNamespaceMknodPaths(vm, paths, npaths) < 0)
if (hasNVMe) {
vfioPath = g_strdup(QEMU_DEV_VFIO);
if (VIR_APPEND_ELEMENT(paths, npaths, vfioPath) < 0)
goto cleanup;
}
if (qemuDomainNamespaceMknodPaths(vm, (const char **) paths, npaths) < 0)
goto cleanup;
ret = 0;
cleanup:
VIR_FREE(dmPath);
VIR_FREE(paths);
virStringListFreeCount(paths, npaths);
return ret;
}