Add support for usage type vTPM to secret. Extend the schema for the Secret to support the vTPM usage type and add a test case for parsing the Secret with usage type vTPM. Signed-off-by: Stefan Berger <stefanb(a)linux.ibm.com&gt; Reviewed-by: Marc-André Lureau <marcandre.lureau(a)redhat.com&gt; --- docs/schemas/secret.rng | 10 ++++++++++ include/libvirt/libvirt-secret.h | 1 + src/conf/secret_conf.c | 13 +++++++++++++ src/util/virsecret.c | 2 +- tests/secretxml2xmlin/usage-vtpm.xml | 7 +++++++ tests/secretxml2xmltest.c | 1 + 6 files changed, 33 insertions(+), 1 deletion(-) create mode 100644 tests/secretxml2xmlin/usage-vtpm.xml diff --git a/docs/schemas/secret.rng b/docs/schemas/secret.rng index 1e94d66e48..e0add8a5e9 100644 --- a/docs/schemas/secret.rng +++ b/docs/schemas/secret.rng @@ -37,6 +37,7 @@ <ref name='usageceph'/> <ref name='usageiscsi'/> <ref name='usagetls'/> + <ref name='usagevtpm'/> <!-- More choices later --> </choice> </element> @@ -81,4 +82,13 @@ </element> </define> + <define name='usagevtpm'> + <attribute name='type'> + <value>vtpm</value> + </attribute> + <element name='name'> + <ref name='genericName'/> + </element> + </define> + </grammar> diff --git a/include/libvirt/libvirt-secret.h b/include/libvirt/libvirt-secret.h index 9a1065f0f3..e5aaac9450 100644 --- a/include/libvirt/libvirt-secret.h +++ b/include/libvirt/libvirt-secret.h @@ -43,6 +43,7 @@ typedef enum { VIR_SECRET_USAGE_TYPE_CEPH = 2, VIR_SECRET_USAGE_TYPE_ISCSI = 3, VIR_SECRET_USAGE_TYPE_TLS = 4, + VIR_SECRET_USAGE_TYPE_VTPM = 5, # ifdef VIR_ENUM_SENTINELS VIR_SECRET_USAGE_TYPE_LAST diff --git a/src/conf/secret_conf.c b/src/conf/secret_conf.c index 5b85a7c0be..b291339e77 100644 --- a/src/conf/secret_conf.c +++ b/src/conf/secret_conf.c @@ -110,6 +110,15 @@ virSecretDefParseUsage(xmlXPathContextPtr ctxt, } break; + case VIR_SECRET_USAGE_TYPE_VTPM: + def->usage_id = virXPathString("string(./usage/name)", ctxt); + if (!def->usage_id) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("vTPM usage specified, but name is missing")); + return -1; + } + break; + default: virReportError(VIR_ERR_INTERNAL_ERROR, _("unexpected secret usage type %d"), @@ -257,6 +266,10 @@ virSecretDefFormatUsage(virBufferPtr buf, virBufferEscapeString(buf, "<name>%s</name>\n", def->usage_id); break; + case VIR_SECRET_USAGE_TYPE_VTPM: + virBufferEscapeString(buf, "<name>%s</name>\n", def->usage_id); + break; + default: virReportError(VIR_ERR_INTERNAL_ERROR, _("unexpected secret usage type %d"), diff --git a/src/util/virsecret.c b/src/util/virsecret.c index 854dc72b06..7844a76a56 100644 --- a/src/util/virsecret.c +++ b/src/util/virsecret.c @@ -34,7 +34,7 @@ VIR_LOG_INIT("util.secret"); VIR_ENUM_IMPL(virSecretUsage, VIR_SECRET_USAGE_TYPE_LAST, - "none", "volume", "ceph", "iscsi", "tls", + "none", "volume", "ceph", "iscsi", "tls", "vtpm", ); void diff --git a/tests/secretxml2xmlin/usage-vtpm.xml b/tests/secretxml2xmlin/usage-vtpm.xml new file mode 100644 index 0000000000..5baff3034d --- /dev/null +++ b/tests/secretxml2xmlin/usage-vtpm.xml @@ -0,0 +1,7 @@ +<secret ephemeral='no' private='yes'> + <uuid>aa6c7af2-45a7-477c-85a2-fe86d9f2514e</uuid> + <description>vTPM secret</description> + <usage type='vtpm'> + <name>vTPMvTPMvTPM</name> + </usage> +</secret> diff --git a/tests/secretxml2xmltest.c b/tests/secretxml2xmltest.c index fd93703424..595583346a 100644 --- a/tests/secretxml2xmltest.c +++ b/tests/secretxml2xmltest.c @@ -80,6 +80,7 @@ mymain(void) DO_TEST("usage-ceph"); DO_TEST("usage-iscsi"); DO_TEST("usage-tls"); + DO_TEST("usage-vtpm"); return ret == 0 ? EXIT_SUCCESS : EXIT_FAILURE; } -- 2.20.1

Add an already existing test case tpm-emulator-tpm2 to qemuxml2xmltest.c Signed-off-by: Stefan Berger <stefanb(a)linux.ibm.com&gt; Reviewed-by: Marc-André Lureau <marcandre.lureau(a)redhat.com&gt; --- tests/qemuxml2xmltest.c | 1 + 1 file changed, 1 insertion(+) diff --git a/tests/qemuxml2xmltest.c b/tests/qemuxml2xmltest.c index a64b17ac28..a29958ae29 100644 --- a/tests/qemuxml2xmltest.c +++ b/tests/qemuxml2xmltest.c @@ -653,6 +653,7 @@ mymain(void) DO_TEST("tpm-passthrough", NONE); DO_TEST("tpm-passthrough-crb", NONE); DO_TEST("tpm-emulator", NONE); + DO_TEST("tpm-emulator-tpm2", NONE); DO_TEST("metadata", NONE); DO_TEST("metadata-duplicate", NONE); -- 2.20.1

Add VIR_STORAGE_ENCRYPTION_FORMAT_VTPM with string 'vtpm' for support of encrypting vTPM storage. Signed-off-by: Stefan Berger <stefanb(a)linux.ibm.com&gt; Reviewed-by: Marc-André Lureau <marcandre.lureau(a)redhat.com&gt; --- src/qemu/qemu_block.c | 1 + src/util/virstorageencryption.c | 2 +- src/util/virstorageencryption.h | 1 + 3 files changed, 3 insertions(+), 1 deletion(-) diff --git a/src/qemu/qemu_block.c b/src/qemu/qemu_block.c index 0a6522577d..c3296c36f5 100644 --- a/src/qemu/qemu_block.c +++ b/src/qemu/qemu_block.c @@ -1184,6 +1184,7 @@ qemuBlockStorageSourceGetCryptoProps(virStorageSourcePtr src, encformat = "luks"; break; + case VIR_STORAGE_ENCRYPTION_FORMAT_VTPM: case VIR_STORAGE_ENCRYPTION_FORMAT_DEFAULT: case VIR_STORAGE_ENCRYPTION_FORMAT_LAST: default: diff --git a/src/util/virstorageencryption.c b/src/util/virstorageencryption.c index 49df7fddd8..4c7356d47a 100644 --- a/src/util/virstorageencryption.c +++ b/src/util/virstorageencryption.c @@ -44,7 +44,7 @@ VIR_ENUM_IMPL(virStorageEncryptionSecret, VIR_ENUM_IMPL(virStorageEncryptionFormat, VIR_STORAGE_ENCRYPTION_FORMAT_LAST, - "default", "qcow", "luks", + "default", "qcow", "luks", "vtpm", ); static void diff --git a/src/util/virstorageencryption.h b/src/util/virstorageencryption.h index 3e5485d88b..29bd00056c 100644 --- a/src/util/virstorageencryption.h +++ b/src/util/virstorageencryption.h @@ -59,6 +59,7 @@ typedef enum { VIR_STORAGE_ENCRYPTION_FORMAT_DEFAULT = 0, VIR_STORAGE_ENCRYPTION_FORMAT_QCOW, /* Both qcow and qcow2 */ VIR_STORAGE_ENCRYPTION_FORMAT_LUKS, + VIR_STORAGE_ENCRYPTION_FORMAT_VTPM, VIR_STORAGE_ENCRYPTION_FORMAT_LAST, } virStorageEncryptionFormatType; -- 2.20.1

Extend the TPM device XML parser and XML generator with emulator state encryption support. Signed-off-by: Stefan Berger <stefanb(a)linux.ibm.com&gt; Reviewed-by: Marc-André Lureau <marcandre.lureau(a)redhat.com&gt; --- src/conf/domain_conf.c | 40 +++++++++++++++++++++++++++++++++++++++- src/conf/domain_conf.h | 1 + 2 files changed, 40 insertions(+), 1 deletion(-) diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c index 3323c9a5b1..df6238c299 100644 --- a/src/conf/domain_conf.c +++ b/src/conf/domain_conf.c @@ -2950,6 +2950,7 @@ void virDomainTPMDefFree(virDomainTPMDefPtr def) virDomainChrSourceDefClear(&def->data.emulator.source); VIR_FREE(def->data.emulator.storagepath); VIR_FREE(def->data.emulator.logfile); + virStorageEncryptionFree(def->data.emulator.encryption); break; case VIR_DOMAIN_TPM_TYPE_LAST: break; @@ -13048,6 +13049,16 @@ virDomainSmartcardDefParseXML(virDomainXMLOptionPtr xmlopt, * <tpm model='tpm-tis'> * <backend type='emulator' version='2'/> * </tpm> + * + * Emulator state encryption is supported with the following: + * + * <tpm model='tpm-tis'> + * <backend type='emulator' version='2'> + * <encryption format='vtpm'> + * <secret type='passphrase' uuid='32ee7e76-2178-47a1-ab7b-269e6e348015'/> + * </encryption> + * </backend> + * </tpm> */ static virDomainTPMDefPtr virDomainTPMDefParseXML(virDomainXMLOptionPtr xmlopt, @@ -13063,6 +13074,7 @@ virDomainTPMDefParseXML(virDomainXMLOptionPtr xmlopt, VIR_AUTOFREE(char *) backend = NULL; VIR_AUTOFREE(char *) version = NULL; VIR_AUTOFREE(xmlNodePtr *) backends = NULL; + xmlNodePtr encnode = NULL; if (VIR_ALLOC(def) < 0) return NULL; @@ -13126,6 +13138,21 @@ virDomainTPMDefParseXML(virDomainXMLOptionPtr xmlopt, def->data.passthrough.source.type = VIR_DOMAIN_CHR_TYPE_DEV; break; case VIR_DOMAIN_TPM_TYPE_EMULATOR: + encnode = virXPathNode("./backend/encryption", ctxt); + if (encnode) { + def->data.emulator.encryption = + virStorageEncryptionParseNode(encnode, ctxt); + if (!def->data.emulator.encryption) + goto error; + if (def->data.emulator.encryption->format != + VIR_STORAGE_ENCRYPTION_FORMAT_VTPM) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, + _("Unsupported vTPM encryption type '%s'"), + virStorageEncryptionFormatTypeToString( + def->data.emulator.encryption->format)); + goto error; + } + } break; case VIR_DOMAIN_TPM_TYPE_LAST: goto error; @@ -25949,8 +25976,19 @@ virDomainTPMDefFormat(virBufferPtr buf, virBufferAddLit(buf, "</backend>\n"); break; case VIR_DOMAIN_TPM_TYPE_EMULATOR: - virBufferAsprintf(buf, " version='%s'/>\n", + virBufferAsprintf(buf, " version='%s'", virDomainTPMVersionTypeToString(def->version)); + if (def->data.emulator.encryption) { + virBufferAddLit(buf, ">\n"); + virBufferAdjustIndent(buf, 2); + if (virStorageEncryptionFormat(buf, + def->data.emulator.encryption) < 0) + return -1; + virBufferAdjustIndent(buf, -2); + virBufferAddLit(buf, "</backend>\n"); + } else { + virBufferAddLit(buf, "/>\n"); + } break; case VIR_DOMAIN_TPM_TYPE_LAST: break; diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h index c1b5fc1337..a03986623a 100644 --- a/src/conf/domain_conf.h +++ b/src/conf/domain_conf.h @@ -1270,6 +1270,7 @@ struct _virDomainTPMDef { virDomainChrSourceDef source; char *storagepath; char *logfile; + virStorageEncryptionPtr encryption; } emulator; } data; }; -- 2.20.1

Extend the TPM XML schema with support for an encryption node. Signed-off-by: Stefan Berger <stefanb(a)linux.ibm.com&gt; Reviewed-by: Marc-André Lureau <marcandre.lureau(a)redhat.com&gt; --- docs/schemas/domaincommon.rng | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng index 31db599ab9..4a4f4f8a4d 100644 --- a/docs/schemas/domaincommon.rng +++ b/docs/schemas/domaincommon.rng @@ -4316,6 +4316,7 @@ <attribute name="type"> <value>emulator</value> </attribute> + <ref name="tpm-backend-emulator-encryption"/> </group> </choice> <choice> @@ -4345,6 +4346,35 @@ </optional> </define> + <define name="tpm-backend-emulator-encryption"> + <optional> + <element name="encryption"> + <attribute name="format"> + <value>vtpm</value> + </attribute> + <ref name="vtpmAuthSecret"/> + </element> + </optional> + </define> + + <define name='vtpmAuthSecret'> + <element name='secret'> + <attribute name='type'> + <choice> + <value>passphrase</value> + </choice> + </attribute> + <choice> + <attribute name='uuid'> + <ref name="UUID"/> + </attribute> + <attribute name='usage'> + <text/> + </attribute> + </choice> + </element> + </define> + <define name="vsock"> <element name="vsock"> <optional> -- 2.20.1

The QEMU command line does not change when TPM state is encrypted compared to when it is plain. Signed-off-by: Stefan Berger <stefanb(a)linux.ibm.com&gt; Reviewed-by: Marc-André Lureau <marcandre.lureau(a)redhat.com&gt; --- .../tpm-emulator-tpm2-enc.x86_64-latest.args | 35 +++++++++++++++++++ tests/qemuxml2argvtest.c | 1 + 2 files changed, 36 insertions(+) create mode 100644 tests/qemuxml2argvdata/tpm-emulator-tpm2-enc.x86_64-latest.args diff --git a/tests/qemuxml2argvdata/tpm-emulator-tpm2-enc.x86_64-latest.args b/tests/qemuxml2argvdata/tpm-emulator-tpm2-enc.x86_64-latest.args new file mode 100644 index 0000000000..3c8dc8e483 --- /dev/null +++ b/tests/qemuxml2argvdata/tpm-emulator-tpm2-enc.x86_64-latest.args @@ -0,0 +1,35 @@ +LC_ALL=C \ +PATH=/bin \ +HOME=/tmp/lib/domain--1-TPM-VM \ +USER=test \ +LOGNAME=test \ +XDG_DATA_HOME=/tmp/lib/domain--1-TPM-VM/.local/share \ +XDG_CACHE_HOME=/tmp/lib/domain--1-TPM-VM/.cache \ +XDG_CONFIG_HOME=/tmp/lib/domain--1-TPM-VM/.config \ +QEMU_AUDIO_DRV=none \ +/usr/bin/qemu-system-x86_64 \ +-name guest=TPM-VM,debug-threads=on \ +-S \ +-object secret,id=masterKey0,format=raw,\ +file=/tmp/lib/domain--1-TPM-VM/master-key.aes \ +-machine pc-i440fx-2.12,accel=tcg,usb=off,dump-guest-core=off \ +-m 2048 \ +-overcommit mem-lock=off \ +-smp 1,sockets=1,cores=1,threads=1 \ +-uuid 11d7cd22-da89-3094-6212-079a48a309a1 \ +-display none \ +-no-user-config \ +-nodefaults \ +-chardev socket,id=charmonitor,fd=1729,server,nowait \ +-mon chardev=charmonitor,id=monitor,mode=control \ +-rtc base=utc \ +-no-shutdown \ +-boot menu=on,strict=on \ +-device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 \ +-tpmdev emulator,id=tpm-tpm0,chardev=chrtpm \ +-chardev socket,id=chrtpm,path=/dev/test \ +-device tpm-tis,tpmdev=tpm-tpm0,id=tpm0 \ +-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x2 \ +-sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,\ +resourcecontrol=deny \ +-msg timestamp=on diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c index 91ca35d469..9c02cac8fc 100644 --- a/tests/qemuxml2argvtest.c +++ b/tests/qemuxml2argvtest.c @@ -2082,6 +2082,7 @@ mymain(void) QEMU_CAPS_DEVICE_TPM_PASSTHROUGH, QEMU_CAPS_DEVICE_TPM_TIS); DO_TEST_CAPS_LATEST("tpm-emulator"); DO_TEST_CAPS_LATEST("tpm-emulator-tpm2"); + DO_TEST_CAPS_LATEST("tpm-emulator-tpm2-enc"); DO_TEST_PARSE_ERROR("pci-domain-invalid", NONE); DO_TEST_PARSE_ERROR("pci-bus-invalid", NONE); -- 2.20.1

On Thu, Jul 11, 2019 at 03:41:36PM -0400, Stefan Berger wrote: Apart from the enum helpers what else is needed ? If it is just the enums, then simpy declare them in the util files instead of in the config file. Regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|

Refactor virTPMEmulatorInit to use a loop with parameters. This allows for easier extension later on. Signed-off-by: Stefan Berger <stefanb(a)linux.ibm.com&gt; Reviewed-by: Marc-André Lureau <marcandre.lureau(a)redhat.com&gt; --- src/tpm/virtpm.c | 80 ++++++++++++++++++++++-------------------------- 1 file changed, 37 insertions(+), 43 deletions(-) diff --git a/src/tpm/virtpm.c b/src/tpm/virtpm.c index 4635d8add0..0179b1e8be 100644 --- a/src/tpm/virtpm.c +++ b/src/tpm/virtpm.c @@ -113,51 +113,45 @@ virTPMGetSwtpmIoctl(void) int virTPMEmulatorInit(void) { - if (!swtpm_path) { - swtpm_path = virFindFileInPath("swtpm"); - if (!swtpm_path) { - virReportSystemError(ENOENT, "%s", - _("Unable to find 'swtpm' binary in $PATH")); - return -1; + static const struct { + const char *name; + char **path; + } prgs[] = { + { + .name = "swtpm", + .path = &swtpm_path, + }, + { + .name = "swtpm_setup", + .path = &swtpm_setup, + }, + { + .name = "swtpm_ioctl", + .path = &swtpm_ioctl, } - if (!virFileIsExecutable(swtpm_path)) { - virReportError(VIR_ERR_INTERNAL_ERROR, - _("TPM emulator %s is not an executable"), - swtpm_path); - VIR_FREE(swtpm_path); - return -1; - } - } - - if (!swtpm_setup) { - swtpm_setup = virFindFileInPath("swtpm_setup"); - if (!swtpm_setup) { - virReportError(VIR_ERR_INTERNAL_ERROR, "%s", - _("Could not find 'swtpm_setup' in PATH")); - return -1; - } - if (!virFileIsExecutable(swtpm_setup)) { - virReportError(VIR_ERR_INTERNAL_ERROR, - _("'%s' is not an executable"), - swtpm_setup); - VIR_FREE(swtpm_setup); - return -1; - } - } + }; + size_t i; - if (!swtpm_ioctl) { - swtpm_ioctl = virFindFileInPath("swtpm_ioctl"); - if (!swtpm_ioctl) { - virReportError(VIR_ERR_INTERNAL_ERROR, "%s", - _("Could not find swtpm_ioctl in PATH")); - return -1; - } - if (!virFileIsExecutable(swtpm_ioctl)) { - virReportError(VIR_ERR_INTERNAL_ERROR, - _("swtpm_ioctl program %s is not an executable"), - swtpm_ioctl); - VIR_FREE(swtpm_ioctl); - return -1; + for (i = 0; i < ARRAY_CARDINALITY(prgs); i++) { + char *path; + bool findit = *prgs[i].path == NULL; + + if (findit) { + path = virFindFileInPath(prgs[i].name); + if (!path) { + virReportSystemError(ENOENT, + _("Unable to find '%s' binary in $PATH"), + prgs[i].name); + return -1; + } + if (!virFileIsExecutable(path)) { + virReportError(VIR_ERR_INTERNAL_ERROR, + _("%s is not an executable"), + path); + VIR_FREE(path); + return -1; + } + *prgs[i].path = path; } } -- 2.20.1

Run 'swtpm socket --print-capabilities' and 'swtpm_setup --print-capabilities' to get the JSON object of the features the programs are supporting and parse them into a bitmap. Signed-off-by: Stefan Berger <stefanb(a)linux.ibm.com&gt; --- src/conf/Makefile.inc.am | 6 ++ src/conf/virtpm_conf.c | 36 +++++++++++ src/conf/virtpm_conf.h | 36 +++++++++++ src/libvirt_private.syms | 5 ++ src/tpm/Makefile.inc.am | 5 +- src/tpm/virtpm.c | 125 +++++++++++++++++++++++++++++++++++++-- 6 files changed, 208 insertions(+), 5 deletions(-) create mode 100644 src/conf/virtpm_conf.c create mode 100644 src/conf/virtpm_conf.h diff --git a/src/conf/Makefile.inc.am b/src/conf/Makefile.inc.am index 08c7c9da7f..e42425fcc5 100644 --- a/src/conf/Makefile.inc.am +++ b/src/conf/Makefile.inc.am @@ -153,6 +153,11 @@ DEVICE_CONF_SOURCES = \ conf/device_conf.h \ $(NULL) +TPM_CONF_SOURCES = \ + conf/virtpm_conf.c \ + conf/virtpm_conf.h \ + $(NULL) + CONF_SOURCES = \ $(NETDEV_CONF_SOURCES) \ $(DOMAIN_CONF_SOURCES) \ @@ -171,6 +176,7 @@ CONF_SOURCES = \ $(CPU_CONF_SOURCES) \ $(CHRDEV_CONF_SOURCES) \ $(DEVICE_CONF_SOURCES) \ + $(TPM_CONF_SOURCES) \ $(NULL) noinst_LTLIBRARIES += libvirt_conf.la diff --git a/src/conf/virtpm_conf.c b/src/conf/virtpm_conf.c new file mode 100644 index 0000000000..12e69e67b3 --- /dev/null +++ b/src/conf/virtpm_conf.c @@ -0,0 +1,36 @@ +/* + * virtpm_conf.c: vTPM XML processing + * + * Copyright (C) 2019 IBM Corporation + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library. If not, see + * <http://www.gnu.org/licenses/>;. + */ + +#include <config.h> + +#include "virenum.h" +#include "virtpm_conf.h" + +#define VIR_FROM_THIS VIR_FROM_NONE + +VIR_ENUM_IMPL(virTPMSwtpmFeature, + VIR_TPM_SWTPM_FEATURE_LAST, + "cmdarg-pwd-fd", +); + +VIR_ENUM_IMPL(virTPMSwtpmSetupFeature, + VIR_TPM_SWTPM_SETUP_FEATURE_LAST, + "cmdarg-pwdfile-fd", +); diff --git a/src/conf/virtpm_conf.h b/src/conf/virtpm_conf.h new file mode 100644 index 0000000000..73c6c67271 --- /dev/null +++ b/src/conf/virtpm_conf.h @@ -0,0 +1,36 @@ +/* + * virtpm_conf.h: vTPM XML processing + * + * Copyright (C) 2019 IBM Corporation + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library. If not, see + * <http://www.gnu.org/licenses/>;. + */ + +#pragma once + +typedef enum { + VIR_TPM_SWTPM_FEATURE_CMDARG_PWD_FD, + + VIR_TPM_SWTPM_FEATURE_LAST +} virTPMSwtpmFeature; + +typedef enum { + VIR_TPM_SWTPM_SETUP_FEATURE_CMDARG_PWDFILE_FD, + + VIR_TPM_SWTPM_SETUP_FEATURE_LAST +} virTPMSwtpmSetupFeature; + +VIR_ENUM_DECL(virTPMSwtpmFeature); +VIR_ENUM_DECL(virTPMSwtpmSetupFeature); diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms index e33d7d9f14..d2045895a1 100644 --- a/src/libvirt_private.syms +++ b/src/libvirt_private.syms @@ -1236,6 +1236,11 @@ virStoragePoolObjVolumeGetNames; virStoragePoolObjVolumeListExport; +# conf/virtpm_conf.h +virTPMSwtpmFeatureTypeFromString; +virTPMSwtpmSetupFeatureTypeFromString; + + # cpu/cpu.h cpuDecode; cpuEncode; diff --git a/src/tpm/Makefile.inc.am b/src/tpm/Makefile.inc.am index 1f5131bf34..d8a15c406c 100644 --- a/src/tpm/Makefile.inc.am +++ b/src/tpm/Makefile.inc.am @@ -12,6 +12,9 @@ EXTRA_DIST += \ noinst_LTLIBRARIES += libvirt_tpm.la libvirt_la_BUILT_LIBADD += libvirt_tpm.la -libvirt_tpm_la_CFLAGS = $(AM_CFLAGS) +libvirt_tpm_la_CFLAGS = \ + -I$(srcdir)/conf \ + $(AM_CFLAGS) \ + $(NULL) libvirt_tpm_la_LDFLAGS = $(AM_LDFLAGS) libvirt_tpm_la_SOURCES = $(TPM_UTIL_SOURCES) diff --git a/src/tpm/virtpm.c b/src/tpm/virtpm.c index e4735f9c4d..5aec663025 100644 --- a/src/tpm/virtpm.c +++ b/src/tpm/virtpm.c @@ -27,6 +27,10 @@ #include "viralloc.h" #include "virfile.h" #include "virtpm.h" +#include "vircommand.h" +#include "virbitmap.h" +#include "virjson.h" +#include "virtpm_conf.h" #define VIR_FROM_THIS VIR_FROM_NONE @@ -74,17 +78,22 @@ virTPMCreateCancelPath(const char *devpath) } /* - * executables for the swtpm; to be found on the host + * executables for the swtpm; to be found on the host along with + * capabilties bitmap */ static char *swtpm_path; static struct stat swtpm_stat; +static virBitmapPtr swtpm_caps; static char *swtpm_setup; static struct stat swtpm_setup_stat; +static virBitmapPtr swtpm_setup_caps; static char *swtpm_ioctl; static struct stat swtpm_ioctl_stat; +typedef int (*TypeFromStringFn)(const char *); + const char * virTPMGetSwtpm(void) { @@ -109,6 +118,99 @@ virTPMGetSwtpmIoctl(void) return swtpm_ioctl; } +/* virTPMExecGetCaps + * + * Execute the prepared command and parse the returned JSON object + * to get the capabilities supported by the executable. + * A JSON object like this is expected: + * + * { + * "type": "swtpm", + * "features": [ + * "cmdarg-seccomp", + * "cmdarg-key-fd", + * "cmdarg-pwd-fd" + * ] + * } + */ +static virBitmapPtr +virTPMExecGetCaps(virCommandPtr cmd, + TypeFromStringFn typeFromStringFn) +{ + int exitstatus; + virBitmapPtr bitmap; + VIR_AUTOFREE(char *) outbuf = NULL; + VIR_AUTOPTR(virJSONValue) json = NULL; + virJSONValuePtr featureList; + virJSONValuePtr item; + size_t idx; + const char *str; + int typ; + + virCommandSetOutputBuffer(cmd, &outbuf); + if (virCommandRun(cmd, &exitstatus) < 0) + return NULL; + + if (!(bitmap = virBitmapNewEmpty())) + return NULL; + + /* older version does not support --print-capabilties -- that's fine */ + if (exitstatus != 0) + return bitmap; + + json = virJSONValueFromString(outbuf); + if (!json) + goto error_bad_json; + + featureList = virJSONValueObjectGetArray(json, "features"); + if (!featureList) + goto error_bad_json; + + if (!virJSONValueIsArray(featureList)) + goto error_bad_json; + + for (idx = 0; idx < virJSONValueArraySize(featureList); idx++) { + item = virJSONValueArrayGet(featureList, idx); + if (!item) + continue; + + str = virJSONValueGetString(item); + if (!str) + goto error_bad_json; + typ = typeFromStringFn(str); + if (typ < 0) + continue; + + if (virBitmapSetBitExpand(bitmap, typ) < 0) + goto cleanup; + } + + cleanup: + return bitmap; + + error_bad_json: + virReportError(VIR_ERR_INTERNAL_ERROR, + _("Unexpected JSON format: %s"), outbuf); + goto cleanup; +} + +static virBitmapPtr +virTPMGetCaps(TypeFromStringFn typeFromStringFn, + const char *exec, const char *param1) +{ + VIR_AUTOPTR(virCommand) cmd = NULL; + + if (!(cmd = virCommandNew(exec))) + return NULL; + + if (param1) + virCommandAddArg(cmd, param1); + virCommandAddArg(cmd, "--print-capabilities"); + virCommandClearCaps(cmd); + + return virTPMExecGetCaps(cmd, typeFromStringFn); +} + /* * virTPMEmulatorInit * @@ -122,16 +224,24 @@ virTPMEmulatorInit(void) const char *name; char **path; struct stat *stat; + const char *parm; + virBitmapPtr *caps; + TypeFromStringFn typeFromStringFn; } prgs[] = { { .name = "swtpm", .path = &swtpm_path, .stat = &swtpm_stat, + .parm = "socket", + .caps = &swtpm_caps, + .typeFromStringFn = virTPMSwtpmFeatureTypeFromString, }, { .name = "swtpm_setup", .path = &swtpm_setup, .stat = &swtpm_setup_stat, + .caps = &swtpm_setup_caps, + .typeFromStringFn = virTPMSwtpmSetupFeatureTypeFromString, }, { .name = "swtpm_ioctl", @@ -142,7 +252,7 @@ virTPMEmulatorInit(void) size_t i; for (i = 0; i < ARRAY_CARDINALITY(prgs); i++) { - char *path; + VIR_AUTOFREE(char *) path = NULL; bool findit = *prgs[i].path == NULL; struct stat statbuf; char *tmp; @@ -174,18 +284,25 @@ virTPMEmulatorInit(void) virReportError(VIR_ERR_INTERNAL_ERROR, _("%s is not an executable"), path); - VIR_FREE(path); return -1; } if (stat(path, prgs[i].stat) < 0) { virReportSystemError(errno, _("Could not stat %s"), path); - VIR_FREE(path); return -1; } tmp = *prgs[i].path; *prgs[i].path = path; VIR_FREE(tmp); + + if (prgs[i].caps) { + *prgs[i].caps = virTPMGetCaps(prgs[i].typeFromStringFn, + path, prgs[i].parm); + path = NULL; + if (!*prgs[i].caps) + return -1; + } + path = NULL; } } -- 2.20.1

Convert the struct pollfd *fds to be allocated rather than residing on the stack. This prepares it for the next patch where the size of the array of fds becomes dynamic. Signed-off-by: Stefan Berger <stefanb(a)linux.ibm.com&gt; --- src/util/vircommand.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/src/util/vircommand.c b/src/util/vircommand.c index 9972a491d6..49347a9800 100644 --- a/src/util/vircommand.c +++ b/src/util/vircommand.c @@ -2137,6 +2137,7 @@ virCommandProcessIO(virCommandPtr cmd) size_t inlen = 0, outlen = 0, errlen = 0; size_t inoff = 0; int ret = 0; + VIR_AUTOFREE(struct pollfd *) fds = NULL; if (dryRunBuffer || dryRunCallback) { VIR_DEBUG("Dry run requested, skipping I/O processing"); @@ -2168,9 +2169,11 @@ virCommandProcessIO(virCommandPtr cmd) goto cleanup; ret = -1; + if (VIR_ALLOC_N(fds, 3) < 0) + goto cleanup; + for (;;) { size_t i; - struct pollfd fds[3]; int nfds = 0; if (cmd->inpipe != -1) { -- 2.20.1

To avoid blocking on a write on a pipe that the receiving process does not read from, write only MAX_PIPE_WRITE_BYTES into the pipe so that we can serve other pipes as well. Signed-off-by: Stefan Berger <stefanb(a)linux.ibm.com&gt; --- src/util/vircommand.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/src/util/vircommand.c b/src/util/vircommand.c index 49347a9800..3ac51c77a8 100644 --- a/src/util/vircommand.c +++ b/src/util/vircommand.c @@ -86,6 +86,8 @@ struct _virCommandSendBuffer { size_t buflen; off_t offset; }; +/* max. number of bytes we write to pipe to avoid blocking on it */ +#define MAX_PIPE_WRITE_BYTES 1024 struct _virCommand { int has_error; /* ENOMEM on allocation failure, -1 for anything else. */ @@ -2251,7 +2253,7 @@ virCommandProcessIO(virCommandPtr cmd) int done; done = write(cmd->inpipe, cmd->inbuf + inoff, - inlen - inoff); + MIN(inlen - inoff, MAX_PIPE_WRITE_BYTES)); if (done < 0) { if (errno == EPIPE) { VIR_DEBUG("child closed stdin early, ignoring EPIPE " -- 2.20.1

Mark a virCommand's inpipe (write-end of pipe) as non-blocking so that it will never block when we were to try to write too many bytes to it while it doesn't have the capacity to hold them. Signed-off-by: Stefan Berger <stefanb(a)linux.ibm.com&gt; --- src/util/vircommand.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/src/util/vircommand.c b/src/util/vircommand.c index 3ac51c77a8..b10bba5b32 100644 --- a/src/util/vircommand.c +++ b/src/util/vircommand.c @@ -2535,6 +2535,13 @@ virCommandRunAsync(virCommandPtr cmd, pid_t *pid) } cmd->infd = infd[0]; cmd->inpipe = infd[1]; + if (fcntl(cmd->inpipe, F_SETFL, O_NONBLOCK) < 0) { + virReportSystemError(errno, "%s", + _("fcntl failed to set O_NONBLOCK")); + cmd->has_error = -1; + ret = -1; + goto cleanup; + } } else if ((cmd->inbuf && cmd->infd == -1) || (cmd->outbuf && cmd->outfdptr != &cmd->outfd) || (cmd->errbuf && cmd->errfdptr != &cmd->errfd)) { -- 2.20.1

On Thu, Jul 11, 2019 at 03:41:45PM -0400, Stefan Berger wrote: The FD is non-blocking, so size limiting the data doesn't seem to serve any useful purpose. Regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|

Allow vTPM state encryption when swtpm_setup and swtpm support passing a passphrase using a file descriptor. This patch enables the encryption of the vTPM state only. It does not encrypt the state during migration, so the destination secret does not need to have the same password at this point. Signed-off-by: Stefan Berger <stefanb(a)linux.ibm.com&gt; --- src/libvirt_private.syms | 2 + src/qemu/qemu_tpm.c | 103 ++++++++++++++++++++++++++++++++++++++- src/tpm/virtpm.c | 16 ++++++ src/tpm/virtpm.h | 3 ++ 4 files changed, 122 insertions(+), 2 deletions(-) diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms index 62366d4fbe..49b19f6846 100644 --- a/src/libvirt_private.syms +++ b/src/libvirt_private.syms @@ -1456,6 +1456,8 @@ virTPMEmulatorInit; virTPMGetSwtpm; virTPMGetSwtpmIoctl; virTPMGetSwtpmSetup; +virTPMSwtpmCapsGet; +virTPMSwtpmSetupCapsGet; # util/viralloc.h diff --git a/src/qemu/qemu_tpm.c b/src/qemu/qemu_tpm.c index 2afa8db448..880b0642c6 100644 --- a/src/qemu/qemu_tpm.c +++ b/src/qemu/qemu_tpm.c @@ -43,6 +43,8 @@ #include "dirname.h" #include "qemu_tpm.h" #include "virtpm.h" +#include "secret_util.h" +#include "virtpm_conf.h" #define VIR_FROM_THIS VIR_FROM_NONE @@ -372,6 +374,62 @@ qemuTPMEmulatorPrepareHost(virDomainTPMDefPtr tpm, return ret; } +/* + * qemuTPMSetupEncryption + * + * @encryption: pointer to virStorageEncryption holding secret + * @cmd: the virCommand to transfer the secret to + * + * Returns file descriptor representing the read-end of a pipe. + * The passphrase can be read from this pipe. Returns < 0 in case + * of error. + * + * This function reads the passphrase and writes it into the + * write-end of a pipe so that the read-end of the pipe can be + * passed to the emulator for reading the passphrase from. + */ +static int +qemuTPMSetupEncryption(virStorageEncryptionPtr encryption, + virCommandPtr cmd) +{ + int ret = -1; + int pipefd[2] = { -1, -1 }; + virConnectPtr conn; + VIR_AUTOFREE(uint8_t *) secret = NULL; + size_t secret_len; + + conn = virGetConnectSecret(); + if (!conn) + return -1; + + if (virSecretGetSecretString(conn, &encryption->secrets[0]->seclookupdef, + VIR_SECRET_USAGE_TYPE_VTPM, + &secret, &secret_len) < 0) + goto error; + + if (pipe(pipefd) == -1) { + virReportSystemError(errno, "%s", + _("Unable to create pipe")); + goto error; + } + + if (virCommandSetSendBuffer(cmd, pipefd[1], secret, secret_len) < 0) + goto error; + + secret = NULL; + ret = pipefd[0]; + + cleanup: + virObjectUnref(conn); + + return ret; + + error: + VIR_FORCE_CLOSE(pipefd[1]); + VIR_FORCE_CLOSE(pipefd[0]); + + goto cleanup; +} /* * qemuTPMEmulatorRunSetup @@ -386,6 +444,7 @@ qemuTPMEmulatorPrepareHost(virDomainTPMDefPtr tpm, * @logfile: The file to write the log into; it must be writable * for the user given by userid or 'tss' * @tpmversion: The version of the TPM, either a TPM 1.2 or TPM 2 + * @encryption: pointer to virStorageEncryption holding secret * * Setup the external swtpm by creating endorsement key and * certificates for it. @@ -398,13 +457,15 @@ qemuTPMEmulatorRunSetup(const char *storagepath, uid_t swtpm_user, gid_t swtpm_group, const char *logfile, - const virDomainTPMVersion tpmversion) + const virDomainTPMVersion tpmversion, + virStorageEncryptionPtr encryption) { virCommandPtr cmd = NULL; int exitstatus; int ret = -1; char uuid[VIR_UUID_STRING_BUFLEN]; char *vmid = NULL; + VIR_AUTOCLOSE pwdfile_fd = -1; if (!privileged && tpmversion == VIR_DOMAIN_TPM_VERSION_1_2) return virFileWriteStr(logfile, @@ -434,6 +495,23 @@ qemuTPMEmulatorRunSetup(const char *storagepath, break; } + if (encryption) { + if (!virTPMSwtpmSetupCapsGet( + VIR_TPM_SWTPM_SETUP_FEATURE_CMDARG_PWDFILE_FD)) { + virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, + _("%s does not support passing a passphrase using a file " + "descriptor"), virTPMGetSwtpmSetup()); + goto cleanup; + } + if ((pwdfile_fd = qemuTPMSetupEncryption(encryption, cmd)) < 0) + goto cleanup; + + virCommandAddArg(cmd, "--pwdfile-fd"); + virCommandAddArgFormat(cmd, "%d", pwdfile_fd); + virCommandAddArgList(cmd, "--cipher", "aes-256-cbc", NULL); + virCommandPassFD(cmd, pwdfile_fd, VIR_COMMAND_PASS_FD_CLOSE_PARENT); + pwdfile_fd = -1; + } virCommandAddArgList(cmd, "--tpm-state", storagepath, @@ -496,6 +574,7 @@ qemuTPMEmulatorBuildCommand(virDomainTPMDefPtr tpm, virCommandPtr cmd = NULL; bool created = false; char *pidfile; + VIR_AUTOCLOSE pwdfile_fd = -1; if (qemuTPMCreateEmulatorStorage(tpm->data.emulator.storagepath, &created, swtpm_user, swtpm_group) < 0) @@ -504,7 +583,8 @@ qemuTPMEmulatorBuildCommand(virDomainTPMDefPtr tpm, if (created && qemuTPMEmulatorRunSetup(tpm->data.emulator.storagepath, vmname, vmuuid, privileged, swtpm_user, swtpm_group, - tpm->data.emulator.logfile, tpm->version) < 0) + tpm->data.emulator.logfile, tpm->version, + tpm->data.emulator.encryption) < 0) goto error; unlink(tpm->data.emulator.source.data.nix.path); @@ -547,6 +627,25 @@ qemuTPMEmulatorBuildCommand(virDomainTPMDefPtr tpm, virCommandAddArgFormat(cmd, "file=%s", pidfile); VIR_FREE(pidfile); + if (tpm->data.emulator.encryption) { + if (!virTPMSwtpmCapsGet(VIR_TPM_SWTPM_FEATURE_CMDARG_PWD_FD)) { + virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, + _("%s does not support passing passphrase via file descriptor"), + virTPMGetSwtpm()); + goto error; + } + + pwdfile_fd = qemuTPMSetupEncryption(tpm->data.emulator.encryption, cmd); + if (pwdfile_fd < 0) + goto error; + + virCommandAddArg(cmd, "--key"); + virCommandAddArgFormat(cmd, "pwdfd=%d,mode=aes-256-cbc,kdf=pbkdf2", + pwdfile_fd); + virCommandPassFD(cmd, pwdfile_fd, VIR_COMMAND_PASS_FD_CLOSE_PARENT); + pwdfile_fd = -1; + } + return cmd; error: diff --git a/src/tpm/virtpm.c b/src/tpm/virtpm.c index 5aec663025..8b43917ef1 100644 --- a/src/tpm/virtpm.c +++ b/src/tpm/virtpm.c @@ -308,3 +308,19 @@ virTPMEmulatorInit(void) return 0; } + +bool +virTPMSwtpmCapsGet(unsigned int cap) +{ + if (virTPMEmulatorInit() < 0) + return false; + return virBitmapIsBitSet(swtpm_caps, cap); +} + +bool +virTPMSwtpmSetupCapsGet(unsigned int cap) +{ + if (virTPMEmulatorInit() < 0) + return false; + return virBitmapIsBitSet(swtpm_setup_caps, cap); +} diff --git a/src/tpm/virtpm.h b/src/tpm/virtpm.h index 66d55fb231..a8bb6e1ba0 100644 --- a/src/tpm/virtpm.h +++ b/src/tpm/virtpm.h @@ -26,3 +26,6 @@ const char *virTPMGetSwtpm(void); const char *virTPMGetSwtpmSetup(void); const char *virTPMGetSwtpmIoctl(void); int virTPMEmulatorInit(void); + +bool virTPMSwtpmCapsGet(unsigned int cap); +bool virTPMSwtpmSetupCapsGet(unsigned int cap); -- 2.20.1

Since swtpm does not support getting started once it was created with encrypted enabled, we don't allow encryption to be removed. Similarly, we do not allow encrypted to be added once swtpm has run. Signed-off-by: Stefan Berger <stefanb(a)linux.ibm.com&gt; --- src/conf/domain_conf.c | 56 +++++++++++++++++++++++++++++++++++++++ src/conf/domain_conf.h | 4 +++ src/libvirt_private.syms | 1 + src/qemu/qemu_driver.c | 28 ++++++++++++++++++++ src/qemu/qemu_extdevice.c | 2 +- src/qemu/qemu_extdevice.h | 3 +++ 6 files changed, 93 insertions(+), 1 deletion(-) diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c index df6238c299..dba8da0e5d 100644 --- a/src/conf/domain_conf.c +++ b/src/conf/domain_conf.c @@ -31435,3 +31435,59 @@ virDomainGraphicsNeedsAutoRenderNode(const virDomainGraphicsDef *graphics) return true; } + + +static int +virDomainCheckTPMChanges(virDomainDefPtr def, + virDomainDefPtr newDef) +{ + bool oldEnc, newEnc; + + if (!def->tpm) + return 0; + + switch (def->tpm->type) { + case VIR_DOMAIN_TPM_TYPE_EMULATOR: + if (virFileExists(def->tpm->data.emulator.storagepath)) { + /* VM has been started */ + /* Once a VM was started with an encrypted state we allow + * less configuration changes. + */ + oldEnc = def->tpm->data.emulator.encryption; + if (oldEnc && def->tpm->type != newDef->tpm->type) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("Changing the type of TPM is not allowed")); + return -1; + } + if (oldEnc && !newDef->tpm) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("Removing an encrypted TPM is not allowed")); + return -1; + } + newEnc = newDef->tpm->data.emulator.encryption; + if (oldEnc != newEnc) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("TPM state encryption cannot be changed " + "once VM was started")); + return -1; + } + } + break; + case VIR_DOMAIN_TPM_TYPE_PASSTHROUGH: + case VIR_DOMAIN_TPM_TYPE_LAST: + break; + } + + return 0; +} + + +int +virDomainCheckDeviceChanges(virDomainDefPtr def, + virDomainDefPtr newDef) +{ + if (!def || !newDef) + return 0; + + return virDomainCheckTPMChanges(def, newDef); +} diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h index a03986623a..a61faa7d57 100644 --- a/src/conf/domain_conf.h +++ b/src/conf/domain_conf.h @@ -3623,3 +3623,7 @@ virDomainGraphicsGetRenderNode(const virDomainGraphicsDef *graphics); bool virDomainGraphicsNeedsAutoRenderNode(const virDomainGraphicsDef *graphics); + +int +virDomainCheckDeviceChanges(virDomainDefPtr def, virDomainDefPtr newDef) + ATTRIBUTE_NONNULL(2); diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms index 49b19f6846..14c4be8f38 100644 --- a/src/libvirt_private.syms +++ b/src/libvirt_private.syms @@ -205,6 +205,7 @@ virDomainBootTypeFromString; virDomainBootTypeToString; virDomainCapabilitiesPolicyTypeToString; virDomainCapsFeatureTypeToString; +virDomainCheckDeviceChanges; virDomainChrConsoleTargetTypeFromString; virDomainChrConsoleTargetTypeToString; virDomainChrDefForeach; diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index ef2e980216..8f224582b6 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -52,6 +52,7 @@ #include "qemu_migration_params.h" #include "qemu_blockjob.h" #include "qemu_security.h" +#include "qemu_extdevice.h" #include "virerror.h" #include "virlog.h" @@ -7568,6 +7569,30 @@ qemuDomainCreate(virDomainPtr dom) return qemuDomainCreateWithFlags(dom, 0); } +static int +qemuDomainCheckDeviceChanges(virQEMUDriverPtr driver, + virDomainDefPtr def) +{ + virDomainObjPtr vm; + int ret; + + vm = virDomainObjListFindByUUID(driver->domains, def->uuid); + if (!vm) + return 0; + + if (qemuExtDevicesInitPaths(driver, vm->def) < 0) { + ret = -1; + goto cleanup; + } + + ret = virDomainCheckDeviceChanges(vm->def, def); + + cleanup: + virDomainObjEndAPI(&vm); + + return ret; +} + static virDomainPtr qemuDomainDefineXMLFlags(virConnectPtr conn, const char *xml, @@ -7604,6 +7629,9 @@ qemuDomainDefineXMLFlags(virConnectPtr conn, if (virDomainDefineXMLFlagsEnsureACL(conn, def) < 0) goto cleanup; + if (qemuDomainCheckDeviceChanges(driver, def) < 0) + goto cleanup; + if (!(vm = virDomainObjListAdd(driver->domains, def, driver->xmlopt, 0, &oldDef))) diff --git a/src/qemu/qemu_extdevice.c b/src/qemu/qemu_extdevice.c index a21caefaba..e576bca165 100644 --- a/src/qemu/qemu_extdevice.c +++ b/src/qemu/qemu_extdevice.c @@ -79,7 +79,7 @@ qemuExtDeviceLogCommand(qemuDomainLogContextPtr logCtxt, * stored and we can remove directories and files in case of domain XML * changes. */ -static int +int qemuExtDevicesInitPaths(virQEMUDriverPtr driver, virDomainDefPtr def) { diff --git a/src/qemu/qemu_extdevice.h b/src/qemu/qemu_extdevice.h index a72e05ce63..bbdb9a1cc2 100644 --- a/src/qemu/qemu_extdevice.h +++ b/src/qemu/qemu_extdevice.h @@ -53,3 +53,6 @@ bool qemuExtDevicesHasDevice(virDomainDefPtr def); int qemuExtDevicesSetupCgroup(virQEMUDriverPtr driver, virDomainDefPtr def, virCgroupPtr cgroup); + +int qemuExtDevicesInitPaths(virQEMUDriverPtr driver, + virDomainDefPtr def); -- 2.20.1

Describe the encryption element in the TPM's domain XML. Signed-off-by: Stefan Berger <stefanb(a)linux.ibm.com&gt; Reviewed-by: Marc-André Lureau <marcandre.lureau(a)redhat.com&gt; --- docs/formatdomain.html.in | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in index a7a6ec32a5..9fa391748e 100644 --- a/docs/formatdomain.html.in +++ b/docs/formatdomain.html.in @@ -8212,6 +8212,9 @@ qemu-kvm -net nic,model=? /dev/null TPM functionality for each VM. QEMU talks to it over a Unix socket. With the emulator device type each guest gets its own private TPM. <span class="since">'emulator' since 4.5.0</span> + The state of the TPM emulator can be encrypted by providing an + <code>encryption</code> element. + <span class="since">'encryption' since 5.6.0</span> </p> <p> Example: usage of the TPM Emulator @@ -8221,6 +8224,9 @@ qemu-kvm -net nic,model=? /dev/null &lt;devices&gt; &lt;tpm model='tpm-tis'&gt; &lt;backend type='emulator' version='2.0'&gt; + &lt;encryption format='vtpm'&gt; + &lt;secret type='passphrase' usage='VTPM_example'/&gt; + &lt;/encryption&gt; &lt;/backend&gt; &lt;/tpm&gt; &lt;/devices&gt; @@ -8283,6 +8289,16 @@ qemu-kvm -net nic,model=? /dev/null <li>'2.0' : creates a TPM 2.0</li> </ul> </dd> + <dt><code>encryption</code></dt> + <dd> + <p> + The <code>encryption</code> element allows the state of a TPM emulator + to be encrypted. The <code>format</code> attribute must be <code>vtpm</code>. + The <code>secret</code> element must reference a secret object using + either its <code>usage</code> or <code>uuid</code>. The <code>type</code> + attribute must be set to <code>passphrase</code>. + </p> + </dd> </dl> <h4><a id="elementsNVRAM">NVRAM device</a></h4> -- 2.20.1