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. Signed-off-by: Stefan Berger <stefanb(a)linux.vnet.ibm.com&gt; --- src/util/virtpm.c | 21 +++++++++++++++++++-- .../qemuxml2argv-tpm-passthrough.args | 2 +- 2 files changed, 20 insertions(+), 3 deletions(-) diff --git a/src/util/virtpm.c b/src/util/virtpm.c index 88f8361..40a758b 100644 --- a/src/util/virtpm.c +++ b/src/util/virtpm.c @@ -23,9 +23,12 @@ #include <config.h> #include <sys/stat.h> +#include <fcntl.h> #include "virstring.h" #include "virerror.h" +#include "viralloc.h" +#include "virfile.h" #include "virtpm.h" #define VIR_FROM_THIS VIR_FROM_NONE @@ -41,13 +44,27 @@ virTPMCreateCancelPath(const char *devpath) { char *path = NULL; const char *dev; + const char *prefix[] = {"misc/", "tpm/"}; + int i, fd; if (devpath) { dev = strrchr(devpath, '/'); if (dev) { dev++; - if (virAsprintf(&path, "/sys/class/misc/%s/device/cancel", - dev) < 0) + for (i = 0; i < ARRAY_CARDINALITY(prefix); i++) { + if (virAsprintf(&path, "/sys/class/%s%s/device/cancel", + prefix[i], dev) < 0) + goto cleanup; + + fd = open(path, O_WRONLY); + if (fd >= 0) { + VIR_FORCE_CLOSE(fd); + break; + } + VIR_FREE(path); + } + /* /dev/null does not allow to cancel cmds but it can be used */ + if (!path && virAsprintf(&path, "/dev/null") < 0) goto cleanup; } else { virReportError(VIR_ERR_INTERNAL_ERROR, diff --git a/tests/qemuxml2argvdata/qemuxml2argv-tpm-passthrough.args b/tests/qemuxml2argvdata/qemuxml2argv-tpm-passthrough.args index f33120f..1e48603 100644 --- a/tests/qemuxml2argvdata/qemuxml2argv-tpm-passthrough.args +++ b/tests/qemuxml2argvdata/qemuxml2argv-tpm-passthrough.args @@ -17,6 +17,6 @@ QEMU_AUDIO_DRV=none \ -boot c \ -usb \ -tpmdev passthrough,id=tpm-tpm0,path=/dev/tpm0,\ -cancel-path=/sys/class/misc/tpm0/device/cancel \ +cancel-path=/dev/null \ -device tpm-tis,tpmdev=tpm-tpm0,id=tpm0 \ -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3 -- 2.4.3