[libvirt] [PATCH v2] tpm: adapt sysfs cancel path for new TPM driver
This patch addresses BZ 1244895.
Adapt the sysfs TPM command cancel path for the TPM driver that
does not use a miscdevice anymore since Linux 4.0. Support old
and new paths and check their availability.
Add a mockup for the test cases to avoid the testing for
availability of the cancel path.
Signed-off-by: Stefan Berger <stefanb(a)linux.vnet.ibm.com>
---
src/util/virtpm.c | 21 ++++++++++++++++++---
tests/qemuxml2argvmock.c | 15 +++++++++++++++
2 files changed, 33 insertions(+), 3 deletions(-)
diff --git a/src/util/virtpm.c b/src/util/virtpm.c
index 88f8361..6d9b065 100644
--- a/src/util/virtpm.c
+++ b/src/util/virtpm.c
@@ -26,6 +26,8 @@
#include "virstring.h"
#include "virerror.h"
+#include "viralloc.h"
+#include "virfile.h"
#include "virtpm.h"
#define VIR_FROM_THIS VIR_FROM_NONE
@@ -41,14 +43,27 @@ virTPMCreateCancelPath(const char *devpath)
{
char *path = NULL;
const char *dev;
+ const char *prefix[] = {"misc/", "tpm/"};
+ size_t i;
if (devpath) {
dev = strrchr(devpath, '/');
if (dev) {
dev++;
- if (virAsprintf(&path, "/sys/class/misc/%s/device/cancel",
- dev) < 0)
- goto cleanup;
+ for (i = 0; i < ARRAY_CARDINALITY(prefix); i++) {
+ if (virAsprintf(&path, "/sys/class/%s%s/device/cancel",
+ prefix[i], dev) < 0)
+ goto cleanup;
+
+ if (virFileExists(path))
+ break;
+
+ VIR_FREE(path);
+ }
+ if (!path)
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("No usable sysfs TPM cancel file could be "
+ "found"));
} else {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("TPM device path %s is invalid"), devpath);
diff --git a/tests/qemuxml2argvmock.c b/tests/qemuxml2argvmock.c
index d24725e..e58b8ce 100644
--- a/tests/qemuxml2argvmock.c
+++ b/tests/qemuxml2argvmock.c
@@ -24,9 +24,13 @@
#include "virnuma.h"
#include "virmock.h"
#include "virutil.h"
+#include "virstring.h"
+#include "virtpm.h"
#include <time.h>
#include <unistd.h>
+#define VIR_FROM_THIS VIR_FROM_NONE
+
long virGetSystemPageSize(void)
{
return 4096;
@@ -59,3 +63,14 @@ virNumaNodeIsAvailable(int node)
return node >= 0 && node <= virNumaGetMaxNode();
}
#endif /* WITH_NUMACTL && HAVE_NUMA_BITMASK_ISBITSET */
+
+char *
+virTPMCreateCancelPath(const char *devpath)
+{
+ char *path;
+ (void)devpath;
+
+ ignore_value(VIR_STRDUP(path, "/sys/class/misc/tpm0/device/cancel"));
+
+ return path;
+}
--
2.4.3