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Helper functions for host TPM support

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Implement helper function to create the TPM's sysfs cancel file.

Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com>
Tested-by: Corey Bryant <coreyb@linux.vnet.ibm.com>
This commit is contained in:
Stefan Berger 2013-04-12 16:55:45 -04:00 committed by Stefan Berger
parent 5eac4f600c
commit 06ba4bff91
5 changed files with 98 additions and 0 deletions
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1
po/POTFILES.in
View File

@ -181,6 +181,7 @@ src/util/virsysinfo.c
src/util/virerror.c
src/util/virerror.h
src/util/virtime.c
src/util/virtpm.c
src/util/virtypedparam.c
src/util/viruri.c
src/util/virusb.c

1
src/Makefile.am
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@ -122,6 +122,7 @@ UTIL_SOURCES = \
util/virthreadwin32.h \
util/virthreadpool.c util/virthreadpool.h \
util/virtime.h util/virtime.c \
util/virtpm.h util/virtpm.c \
util/virtypedparam.c util/virtypedparam.h \
util/virusb.c util/virusb.h \
util/viruri.h util/viruri.c \

4
src/libvirt_private.syms
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@ -1781,6 +1781,10 @@ virTimeStringThen;
virTimeStringThenRaw;
# util/virtpm.h
virTPMCreateCancelPath;
# util/virtypedparam.h
virTypedParameterArrayValidate;
virTypedParameterAssign;

65
src/util/virtpm.c Normal file
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@ -0,0 +1,65 @@
/*
* virtpm.c: TPM support
*
* Copyright (C) 2013 IBM Corporation
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*
* Author: Stefan Berger <stefanb@linux.vnet.ibm.com>
*/
#include <config.h>
#include <sys/stat.h>
#include "virutil.h"
#include "virerror.h"
#include "virtpm.h"
#define VIR_FROM_THIS VIR_FROM_NONE
/**
* virTPMCreateCancelPath:
* @devpath: Path to the TPM device
*
* Create the cancel path given the path to the TPM device
*/
char *
virTPMCreateCancelPath(const char *devpath)
{
char *path = NULL;
const char *dev;
if (devpath) {
dev = strrchr(devpath, '/');
if (dev) {
dev++;
if (virAsprintf(&path, "/sys/class/misc/%s/device/cancel",
dev) < 0) {
virReportOOMError();
goto cleanup;
}
} else {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("TPM device path %s is invalid"), devpath);
}
} else {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Missing TPM device path"));
}
cleanup:
return path;
}

27
src/util/virtpm.h Normal file
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@ -0,0 +1,27 @@
/*
* virtpm.h: TPM support
*
* Copyright (C) 2013 IBM Corporation
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*
* Author: Stefan Berger <stefanb@linux.vnet.ibm.com>
*/
#ifndef __VIR_TPM_H__
# define __VIR_TPM_H__
char *virTPMCreateCancelPath(const char *devpath);
#endif /* __VIR_TPM_H__ */