qemu: Generate NVRAM path in more cases

Right now, we only generate it after finding a matching entry either among firmware descriptors or in the legacy firmware list. Even if the domain is configured to use a custom firmware build that we know nothing about, however, we should still automatically generate the NVRAM path instead of requiring the user to provide it manually. Signed-off-by: Andrea Bolognani <abologna@redhat.com> Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
2024-12-22 05:35:25 +00:00 · 2023-05-26 14:40:02 +02:00 · 2023-05-26 14:40:02 +02:00 · ccbb987707
commit ccbb987707
parent 4a49114ff4
8 changed files with 109 additions and 27 deletions
--- a/src/qemu/qemu_firmware.c
+++ b/src/qemu/qemu_firmware.c
@ -1053,7 +1053,7 @@ qemuFirmwareOSInterfaceTypeFromOsDefLoaderType(virDomainLoader type)
 /**
 * qemuFirmwareEnsureNVRAM:
 * @def: domain definition
- * @cfg: QEMU driver configuration
+ * @driver: QEMU driver
 *
 * Make sure that a source for the NVRAM file exists, possibly by
 * creating it. This might involve automatically generating the
@ -1061,15 +1061,24 @@ qemuFirmwareOSInterfaceTypeFromOsDefLoaderType(virDomainLoader type)
 */
 static void
 qemuFirmwareEnsureNVRAM(virDomainDef *def,
-                        const virQEMUDriverConfig *cfg,
-                        virStorageFileFormat format)
+                        virQEMUDriver *driver)
 {
+    g_autoptr(virQEMUDriverConfig) cfg = virQEMUDriverGetConfig(driver);
    virDomainLoaderDef *loader = def->os.loader;
    const char *ext = NULL;

    if (!loader)
        return;

+    if (loader->type != VIR_DOMAIN_LOADER_TYPE_PFLASH)
+        return;
+
+    if (loader->readonly != VIR_TRISTATE_BOOL_YES)
+        return;
+
+    if (loader->stateless == VIR_TRISTATE_BOOL_YES)
+        return;
+
    /* If the source already exists and is fully specified, including
     * the path, leave it alone */
    if (loader->nvram && loader->nvram->path)
@ -1080,11 +1089,11 @@ qemuFirmwareEnsureNVRAM(virDomainDef *def,

    loader->nvram = virStorageSourceNew();
    loader->nvram->type = VIR_STORAGE_TYPE_FILE;
-    loader->nvram->format = format;
+    loader->nvram->format = loader->format;

-    if (format == VIR_STORAGE_FILE_RAW)
+    if (loader->nvram->format == VIR_STORAGE_FILE_RAW)
        ext = ".fd";
-    if (format == VIR_STORAGE_FILE_QCOW2)
+    if (loader->nvram->format == VIR_STORAGE_FILE_QCOW2)
        ext = ".qcow2";

    loader->nvram->path = g_strdup_printf("%s/%s_VARS%s",
@ -1347,8 +1356,7 @@ qemuFirmwareMatchDomain(const virDomainDef *def,


 static int
-qemuFirmwareEnableFeaturesModern(virQEMUDriverConfig *cfg,
-                                 virDomainDef *def,
+qemuFirmwareEnableFeaturesModern(virDomainDef *def,
                                 const qemuFirmware *fw)
 {
    const qemuFirmwareMappingFlash *flash = &fw->mapping.data.flash;
@ -1377,16 +1385,15 @@ qemuFirmwareEnableFeaturesModern(virQEMUDriverConfig *cfg,
        loader->path = g_strdup(flash->executable.filename);

        if (flash->mode == QEMU_FIRMWARE_FLASH_MODE_SPLIT) {
-            if ((format = virStorageFileFormatTypeFromString(flash->nvram_template.format)) < 0)
-                return -1;
-
-            qemuFirmwareEnsureNVRAM(def, cfg, format);
-
-            /* If the NVRAM is not a local path then we can't create or
-             * reset it, so in that case filling in the nvramTemplate
-             * field would be misleading */
+            /* Only fill in nvramTemplate if the NVRAM location is already
+             * known to be a local path or hasn't been provided, in which
+             * case a local path will be generated by libvirt later.
+             *
+             * We can't create or reset non-local NVRAM files, so filling
+             * in nvramTemplate for those would be misleading */
            VIR_FREE(loader->nvramTemplate);
-            if (loader->nvram && virStorageSourceIsLocalStorage(loader->nvram)) {
+            if (!loader->nvram ||
+                (loader->nvram && virStorageSourceIsLocalStorage(loader->nvram))) {
                loader->nvramTemplate = g_strdup(flash->nvram_template.filename);
            }
        }
@ -1608,6 +1615,7 @@ qemuFirmwareFillDomainLegacy(virQEMUDriver *driver,

        loader->type = VIR_DOMAIN_LOADER_TYPE_PFLASH;
        loader->readonly = VIR_TRISTATE_BOOL_YES;
+        loader->format = VIR_STORAGE_FILE_RAW;

        /* Only use the default template path if one hasn't been
         * provided by the user.
@ -1634,8 +1642,6 @@ qemuFirmwareFillDomainLegacy(virQEMUDriver *driver,
        if (!loader->nvramTemplate)
            loader->nvramTemplate = g_strdup(cfg->firmwares[i]->nvram);

-        qemuFirmwareEnsureNVRAM(def, cfg, VIR_STORAGE_FILE_RAW);
-
        VIR_DEBUG("decided on firmware '%s' template '%s'",
                  loader->path, NULLSTR(loader->nvramTemplate));

@ -1664,7 +1670,6 @@ static int
 qemuFirmwareFillDomainModern(virQEMUDriver *driver,
                             virDomainDef *def)
 {
-    g_autoptr(virQEMUDriverConfig) cfg = virQEMUDriverGetConfig(driver);
    g_auto(GStrv) paths = NULL;
    qemuFirmware **firmwares = NULL;
    ssize_t nfirmwares = 0;
@ -1695,7 +1700,7 @@ qemuFirmwareFillDomainModern(virQEMUDriver *driver,
     * likely that admin/FW manufacturer messed up. */
    qemuFirmwareSanityCheck(theone, paths[i]);

-    if (qemuFirmwareEnableFeaturesModern(cfg, def, theone) < 0)
+    if (qemuFirmwareEnableFeaturesModern(def, theone) < 0)
        goto cleanup;

    ret = 0;
@ -1802,6 +1807,11 @@ qemuFirmwareFillDomain(virQEMUDriver *driver,
        }
    }

+    /* Always ensure that the NVRAM path is present, even if we
+     * haven't found a match: the configuration might simply be
+     * referring to a custom firmware build */
+    qemuFirmwareEnsureNVRAM(def, driver);
+
    return 0;
 }

--- a/tests/qemuxml2argvdata/firmware-manual-efi-loader-path-nonstandard.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/firmware-manual-efi-loader-path-nonstandard.x86_64-latest.args
@ -0,0 +1,37 @@
+LC_ALL=C \
+PATH=/bin \
+HOME=/var/lib/libvirt/qemu/domain--1-guest \
+USER=test \
+LOGNAME=test \
+XDG_DATA_HOME=/var/lib/libvirt/qemu/domain--1-guest/.local/share \
+XDG_CACHE_HOME=/var/lib/libvirt/qemu/domain--1-guest/.cache \
+XDG_CONFIG_HOME=/var/lib/libvirt/qemu/domain--1-guest/.config \
+/usr/bin/qemu-system-x86_64 \
+-name guest=guest,debug-threads=on \
+-S \
+-object '{"qom-type":"secret","id":"masterKey0","format":"raw","file":"/var/lib/libvirt/qemu/domain--1-guest/master-key.aes"}' \
+-blockdev '{"driver":"file","filename":"/path/to/OVMF_CODE.fd","node-name":"libvirt-pflash0-storage","auto-read-only":true,"discard":"unmap"}' \
+-blockdev '{"node-name":"libvirt-pflash0-format","read-only":true,"driver":"raw","file":"libvirt-pflash0-storage"}' \
+-blockdev '{"driver":"file","filename":"/var/lib/libvirt/qemu/nvram/guest_VARS.fd","node-name":"libvirt-pflash1-storage","auto-read-only":true,"discard":"unmap"}' \
+-blockdev '{"node-name":"libvirt-pflash1-format","read-only":false,"driver":"raw","file":"libvirt-pflash1-storage"}' \
+-machine pc-q35-4.0,usb=off,dump-guest-core=off,memory-backend=pc.ram,pflash0=libvirt-pflash0-format,pflash1=libvirt-pflash1-format,acpi=on \
+-accel tcg \
+-cpu qemu64 \
+-m size=1048576k \
+-object '{"qom-type":"memory-backend-ram","id":"pc.ram","size":1073741824}' \
+-overcommit mem-lock=off \
+-smp 1,sockets=1,cores=1,threads=1 \
+-uuid 63840878-0deb-4095-97e6-fc444d9bc9fa \
+-display none \
+-no-user-config \
+-nodefaults \
+-chardev socket,id=charmonitor,fd=1729,server=on,wait=off \
+-mon chardev=charmonitor,id=monitor,mode=control \
+-rtc base=utc \
+-no-shutdown \
+-boot strict=on \
+-audiodev '{"id":"audio1","driver":"none"}' \
+-global ICH9-LPC.noreboot=off \
+-watchdog-action reset \
+-sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,resourcecontrol=deny \
+-msg timestamp=on
--- a/tests/qemuxml2argvdata/firmware-manual-efi-loader-path-nonstandard.x86_64-latest.err
+++ b/tests/qemuxml2argvdata/firmware-manual-efi-loader-path-nonstandard.x86_64-latest.err
@ -1 +0,0 @@
-internal error: argument key 'filename' must not have null value
--- a/tests/qemuxml2argvdata/firmware-manual-efi-nvram-template-nonstandard.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/firmware-manual-efi-nvram-template-nonstandard.x86_64-latest.args
@ -0,0 +1,37 @@
+LC_ALL=C \
+PATH=/bin \
+HOME=/var/lib/libvirt/qemu/domain--1-guest \
+USER=test \
+LOGNAME=test \
+XDG_DATA_HOME=/var/lib/libvirt/qemu/domain--1-guest/.local/share \
+XDG_CACHE_HOME=/var/lib/libvirt/qemu/domain--1-guest/.cache \
+XDG_CONFIG_HOME=/var/lib/libvirt/qemu/domain--1-guest/.config \
+/usr/bin/qemu-system-x86_64 \
+-name guest=guest,debug-threads=on \
+-S \
+-object '{"qom-type":"secret","id":"masterKey0","format":"raw","file":"/var/lib/libvirt/qemu/domain--1-guest/master-key.aes"}' \
+-blockdev '{"driver":"file","filename":"/usr/share/edk2/ovmf/OVMF_CODE.fd","node-name":"libvirt-pflash0-storage","auto-read-only":true,"discard":"unmap"}' \
+-blockdev '{"node-name":"libvirt-pflash0-format","read-only":true,"driver":"raw","file":"libvirt-pflash0-storage"}' \
+-blockdev '{"driver":"file","filename":"/var/lib/libvirt/qemu/nvram/guest_VARS.fd","node-name":"libvirt-pflash1-storage","auto-read-only":true,"discard":"unmap"}' \
+-blockdev '{"node-name":"libvirt-pflash1-format","read-only":false,"driver":"raw","file":"libvirt-pflash1-storage"}' \
+-machine pc-q35-4.0,usb=off,dump-guest-core=off,memory-backend=pc.ram,pflash0=libvirt-pflash0-format,pflash1=libvirt-pflash1-format,acpi=on \
+-accel kvm \
+-cpu qemu64 \
+-m size=1048576k \
+-object '{"qom-type":"memory-backend-ram","id":"pc.ram","size":1073741824}' \
+-overcommit mem-lock=off \
+-smp 1,sockets=1,cores=1,threads=1 \
+-uuid 63840878-0deb-4095-97e6-fc444d9bc9fa \
+-display none \
+-no-user-config \
+-nodefaults \
+-chardev socket,id=charmonitor,fd=1729,server=on,wait=off \
+-mon chardev=charmonitor,id=monitor,mode=control \
+-rtc base=utc \
+-no-shutdown \
+-boot strict=on \
+-audiodev '{"id":"audio1","driver":"none"}' \
+-global ICH9-LPC.noreboot=off \
+-watchdog-action reset \
+-sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,resourcecontrol=deny \
+-msg timestamp=on
--- a/tests/qemuxml2argvdata/firmware-manual-efi-nvram-template-nonstandard.x86_64-latest.err
+++ b/tests/qemuxml2argvdata/firmware-manual-efi-nvram-template-nonstandard.x86_64-latest.err
@ -1 +0,0 @@
-internal error: argument key 'filename' must not have null value
--- a/tests/qemuxml2argvtest.c
+++ b/tests/qemuxml2argvtest.c
@ -1051,13 +1051,13 @@ mymain(void)
    DO_TEST_CAPS_LATEST("firmware-manual-efi-rw-implicit");
    DO_TEST_CAPS_LATEST("firmware-manual-efi-loader-secure");
    DO_TEST_CAPS_LATEST_PARSE_ERROR("firmware-manual-efi-loader-no-path");
-    DO_TEST_CAPS_LATEST_FAILURE("firmware-manual-efi-loader-path-nonstandard");
+    DO_TEST_CAPS_LATEST("firmware-manual-efi-loader-path-nonstandard");
    DO_TEST_CAPS_LATEST("firmware-manual-efi-secboot");
    DO_TEST_CAPS_LATEST("firmware-manual-efi-no-enrolled-keys");
    DO_TEST_CAPS_LATEST("firmware-manual-efi-no-secboot");
    DO_TEST_CAPS_LATEST("firmware-manual-efi-stateless");
    DO_TEST_CAPS_LATEST("firmware-manual-efi-nvram-template");
-    DO_TEST_CAPS_LATEST_FAILURE("firmware-manual-efi-nvram-template-nonstandard");
+    DO_TEST_CAPS_LATEST("firmware-manual-efi-nvram-template-nonstandard");
    DO_TEST_CAPS_LATEST_PARSE_ERROR("firmware-manual-efi-nvram-template-stateless");
    DO_TEST_CAPS_LATEST("firmware-manual-efi-nvram-network-iscsi");
    DO_TEST_CAPS_LATEST("firmware-manual-efi-nvram-network-nbd");
--- a/tests/qemuxml2xmloutdata/firmware-manual-efi-loader-path-nonstandard.x86_64-latest.xml
+++ b/tests/qemuxml2xmloutdata/firmware-manual-efi-loader-path-nonstandard.x86_64-latest.xml
@ -7,7 +7,7 @@
  <os>
    <type arch='x86_64' machine='pc-q35-4.0'>hvm</type>
    <loader readonly='yes' type='pflash'>/path/to/OVMF_CODE.fd</loader>
-    <nvram template='/path/to/OVMF_VARS.fd'/>
+    <nvram template='/path/to/OVMF_VARS.fd'>/var/lib/libvirt/qemu/nvram/guest_VARS.fd</nvram>
    <boot dev='hd'/>
  </os>
  <features>
--- a/tests/qemuxml2xmloutdata/firmware-manual-efi-nvram-template-nonstandard.x86_64-latest.xml
+++ b/tests/qemuxml2xmloutdata/firmware-manual-efi-nvram-template-nonstandard.x86_64-latest.xml
@ -7,7 +7,7 @@
  <os>
    <type arch='x86_64' machine='pc-q35-4.0'>hvm</type>
    <loader readonly='yes' type='pflash'>/usr/share/edk2/ovmf/OVMF_CODE.fd</loader>
-    <nvram template='/path/to/OVMF_VARS.fd'/>
+    <nvram template='/path/to/OVMF_VARS.fd'>/var/lib/libvirt/qemu/nvram/guest_VARS.fd</nvram>
    <boot dev='hd'/>
  </os>
  <features>
				`@ -1 +0,0 @@`
				`internal error: argument key 'filename' must not have null value`