On Fri, Oct 8, 2021 at 5:56 PM Stefan Berger <stefanb@xxxxxxxxxxxxx> wrote:
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@xxxxxxxxxxxxx>
v2:
- fixed return code if swtpm_setup doesn't support the option
---
src/qemu/qemu_tpm.c | 43 +++++++++++++++++++++++++++++++++++++++++++
src/util/virtpm.c | 1 +
src/util/virtpm.h | 1 +
3 files changed, 45 insertions(+)
diff --git a/src/qemu/qemu_tpm.c b/src/qemu/qemu_tpm.c
index 100481503c..bf6c8e5ad5 100644
--- a/src/qemu/qemu_tpm.c
+++ b/src/qemu/qemu_tpm.c
@@ -385,6 +385,46 @@ qemuTPMSetupEncryption(const unsigned char *secretuuid,
return virCommandSetSendBuffer(cmd, g_steal_pointer(&secret), secret_len);
}
+
+/*
+ * qemuTPMCreateConfigFiles: run swtpm_setup --create-config-files skip-if-exist
+ *
+ * @logfile: The file to write the log into; it must be writable
+ * for the user given by userid or 'tss'
+ */
+static int
+qemuTPMCreateConfigFiles(const char *logfile)
+{
+ g_autofree char *swtpm_setup = virTPMGetSwtpmSetup();
+ g_autoptr(virCommand) cmd = 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);
+
+ if (virCommandRun(cmd, &exitstatus) < 0 || exitstatus != 0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ _("Could not run '%s' to create config files. exitstatus: %d; "
+ "Check error log '%s' for details."),
+ swtpm_setup, exitstatus, logfile);
logfile isn't used, it seems
+ return -1;
+ }
+
+ return 0;
+}
+
+
/*
* qemuTPMEmulatorRunSetup
*
@@ -432,6 +472,9 @@ qemuTPMEmulatorRunSetup(const char *storagepath,
"this requires privileged mode for a "
"TPM 1.2\n"), 0600);
+ if (!privileged && qemuTPMCreateConfigFiles(logfile))
+ 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
lgtm otherwise
