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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>
79 lines
2.2 KiB
C
79 lines
2.2 KiB
C
/*
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* virtpm.c: TPM support
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*
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* Copyright (C) 2013 IBM Corporation
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*
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* Author: Stefan Berger <stefanb@linux.vnet.ibm.com>
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*/
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#include <config.h>
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#include <sys/stat.h>
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#include "virstring.h"
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#include "virerror.h"
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#include "viralloc.h"
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#include "virfile.h"
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#include "virtpm.h"
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#define VIR_FROM_THIS VIR_FROM_NONE
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/**
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* virTPMCreateCancelPath:
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* @devpath: Path to the TPM device
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*
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* Create the cancel path given the path to the TPM device
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*/
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char *
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virTPMCreateCancelPath(const char *devpath)
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{
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char *path = NULL;
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const char *dev;
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const char *prefix[] = {"misc/", "tpm/"};
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size_t i;
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if (devpath) {
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dev = strrchr(devpath, '/');
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if (dev) {
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dev++;
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for (i = 0; i < ARRAY_CARDINALITY(prefix); i++) {
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if (virAsprintf(&path, "/sys/class/%s%s/device/cancel",
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prefix[i], dev) < 0)
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goto cleanup;
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if (virFileExists(path))
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break;
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VIR_FREE(path);
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}
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if (!path)
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virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
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_("No usable sysfs TPM cancel file could be "
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"found"));
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} else {
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virReportError(VIR_ERR_INTERNAL_ERROR,
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_("TPM device path %s is invalid"), devpath);
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}
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} else {
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virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
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_("Missing TPM device path"));
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}
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cleanup:
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return path;
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}
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