Re: [libvirt PATCHv5 10/15] qemu: validate virtiofs filesystems

Reject unsupported configurations. Signed-off-by: Ján Tomko <jtomko(a)redhat.com&gt; --- src/qemu/qemu_domain.c | 82 +++++++++++++++++++++++++++++++++++++++--- 1 file changed, 77 insertions(+), 5 deletions(-) diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c index e1ee8d4692..d85c089dce 100644 --- a/src/qemu/qemu_domain.c +++ b/src/qemu/qemu_domain.c @@ -8270,11 +8270,52 @@ qemuDomainDeviceDefValidateIOMMU(const virDomainIOMMUDef *iommu, return 0; } +static int +qemuDomainDefValidateVirtioFSSharedMemory(const virDomainDef *def) +{ + size_t numa_nodes = virDomainNumaGetNodeCount(def->numa); + size_t i; + + if (numa_nodes == 0) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("virtiofs requires one or more NUMA nodes")); + return -1; + } + + for (i = 0; i < numa_nodes; i++) { + virDomainMemoryAccess node_access = + virDomainNumaGetNodeMemoryAccessMode(def->numa, i); + + switch (node_access) { + case VIR_DOMAIN_MEMORY_ACCESS_DEFAULT: + if (def->mem.access != VIR_DOMAIN_MEMORY_ACCESS_SHARED) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("virtiofs requires shared memory")); + return -1; + } + break; + case VIR_DOMAIN_MEMORY_ACCESS_SHARED: + break; + case VIR_DOMAIN_MEMORY_ACCESS_PRIVATE: + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("virtiofs requires shared memory")); + return -1; + + case VIR_DOMAIN_MEMORY_ACCESS_LAST: + default: + virReportEnumRangeError(virDomainMemoryAccess, node_access); + return -1; + + } + } + return 0; +} static int qemuDomainDeviceDefValidateFS(virDomainFSDefPtr fs, - const virDomainDef *def G_GNUC_UNUSED, - virQEMUCapsPtr qemuCaps G_GNUC_UNUSED) + const virDomainDef *def, + virQEMUDriverPtr driver, + virQEMUCapsPtr qemuCaps) { if (fs->type != VIR_DOMAIN_FS_TYPE_MOUNT) { virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", @@ -8303,8 +8344,39 @@ qemuDomainDeviceDefValidateFS(virDomainFSDefPtr fs, return -1; case VIR_DOMAIN_FS_DRIVER_TYPE_VIRTIOFS: - /* TODO: vhost-user-fs-pci */ - return 0; + if (!virQEMUDriverIsPrivileged(driver)) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("virtiofs is not yet supported in session mode")); + return -1; + } + if (fs->accessmode != VIR_DOMAIN_FS_ACCESSMODE_PASSTHROUGH) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("virtiofs only supports passthrough accessmode")); + return -1; + } + if (fs->wrpolicy != VIR_DOMAIN_FS_WRPOLICY_DEFAULT) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("virtiofs does not support wrpolicy")); + return -1; + } + if (fs->model != VIR_DOMAIN_FS_MODEL_DEFAULT) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("virtiofs does not support model")); + return -1; + } + if (fs->format != VIR_STORAGE_FILE_NONE) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("virtiofs does not support format")); + return -1; + } + if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE_VHOST_USER_FS)) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("virtiofs is not supported with this QEMU binary")); + return -1; + } + if (qemuDomainDefValidateVirtioFSSharedMemory(def) < 0) + return -1; + break; case VIR_DOMAIN_FS_DRIVER_TYPE_LAST: default: @@ -8483,7 +8555,7 @@ qemuDomainDeviceDefValidate(const virDomainDeviceDef *dev, break; case VIR_DOMAIN_DEVICE_FS: - ret = qemuDomainDeviceDefValidateFS(dev->data.fs, def, qemuCaps); + ret = qemuDomainDeviceDefValidateFS(dev->data.fs, def, driver, qemuCaps); break; case VIR_DOMAIN_DEVICE_NVRAM: -- 2.24.1