Re: [PATCH v4] qemu: tpm: Run swtpm_setup --create-config-files in session mode

Using swtpm v0.7.0 we can run swtpm_setup to create default config files for swtpm_setup and swtpm-localca in session mode. Now a user can start a VM with an attached TPM without having to run this program on the command line before. This program needs to run once. This patch addresses the issue raised in https://bugzilla.redhat.com/show_bug.cgi?id=2010649 Signed-off-by: Stefan Berger <stefanb(a)linux.ibm.com&gt; --- v4: - Append stderr output to virReportError if swtpm_setup fails v3: - Removed logfile parameter v2: - fixed return code if swtpm_setup doesn't support the option --- src/qemu/qemu_tpm.c | 42 ++++++++++++++++++++++++++++++++++++++++++ src/util/virtpm.c | 1 + src/util/virtpm.h | 1 + 3 files changed, 44 insertions(+) diff --git a/src/qemu/qemu_tpm.c b/src/qemu/qemu_tpm.c index 100481503c..f797a87fdc 100644 --- a/src/qemu/qemu_tpm.c +++ b/src/qemu/qemu_tpm.c @@ -385,6 +385,45 @@ qemuTPMSetupEncryption(const unsigned char *secretuuid, return virCommandSetSendBuffer(cmd, g_steal_pointer(&secret), secret_len); } + +/* + * qemuTPMCreateConfigFiles: run swtpm_setup --create-config-files skip-if-exist + */ +static int +qemuTPMCreateConfigFiles(void) +{ + g_autofree char *swtpm_setup = virTPMGetSwtpmSetup(); + g_autoptr(virCommand) cmd = NULL; + g_autofree char *errbuf = NULL; + int exitstatus; + + if (!swtpm_setup) + return -1; + + if (!virTPMSwtpmSetupCapsGet( + VIR_TPM_SWTPM_SETUP_FEATURE_CMDARG_CREATE_CONFIG_FILES)) + return 0; + + cmd = virCommandNew(swtpm_setup); + if (!cmd) + return -1; + + virCommandAddArgList(cmd, "--create-config-files", "skip-if-exist", NULL); + virCommandClearCaps(cmd); + virCommandSetErrorBuffer(cmd, &errbuf); + + if (virCommandRun(cmd, &exitstatus) < 0 || exitstatus != 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, + _("Could not run '%s' to create config files. " + "exitstatus: %d;\nError: %s"), + swtpm_setup, exitstatus, errbuf); + return -1; + } + + return 0; +} + + /* * qemuTPMEmulatorRunSetup * @@ -432,6 +471,9 @@ qemuTPMEmulatorRunSetup(const char *storagepath, "this requires privileged mode for a " "TPM 1.2\n"), 0600); + if (!privileged && qemuTPMCreateConfigFiles()) + return -1; + cmd = virCommandNew(swtpm_setup); if (!cmd) return -1; diff --git a/src/util/virtpm.c b/src/util/virtpm.c index 1a567139b4..0f50de866c 100644 --- a/src/util/virtpm.c +++ b/src/util/virtpm.c @@ -45,6 +45,7 @@ VIR_ENUM_IMPL(virTPMSwtpmFeature, VIR_ENUM_IMPL(virTPMSwtpmSetupFeature, VIR_TPM_SWTPM_SETUP_FEATURE_LAST, "cmdarg-pwdfile-fd", + "cmdarg-create-config-files", ); /** diff --git a/src/util/virtpm.h b/src/util/virtpm.h index d021a083b4..3bb03b3b33 100644 --- a/src/util/virtpm.h +++ b/src/util/virtpm.h @@ -38,6 +38,7 @@ typedef enum { typedef enum { VIR_TPM_SWTPM_SETUP_FEATURE_CMDARG_PWDFILE_FD, + VIR_TPM_SWTPM_SETUP_FEATURE_CMDARG_CREATE_CONFIG_FILES, VIR_TPM_SWTPM_SETUP_FEATURE_LAST } virTPMSwtpmSetupFeature; -- 2.31.1