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tpm: adapt sysfs cancel path for new TPM driver

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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@linux.vnet.ibm.com>
This commit is contained in:
Stefan Berger 2015-11-17 19:44:13 -05:00 committed by Cole Robinson
parent b6e19cf4cb
commit 5ed7afa9de
2 changed files with 33 additions and 3 deletions
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21
src/util/virtpm.c
View File

@ -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);

15
tests/qemuxml2argvmock.c
View File

@ -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;
}