[libvirt] [PATCH 1/2] cpuCompare*: Add support for reporting failure on incompatible CPUs
Jiri Denemark
jdenemar at redhat.com
Wed Jun 25 12:34:43 UTC 2014
When CPU comparison APIs return VIR_CPU_COMPARE_INCOMPATIBLE, the caller
has no clue why the CPU is considered incompatible with host CPU. And in
some cases, it would be nice to be able to get such info in a client
rather than having to look in logs.
To achieve this, the APIs can be told to return VIR_ERR_CPU_INCOMPATIBLE
error for incompatible CPUs and the reason will be described in the
associated error message.
Signed-off-by: Jiri Denemark <jdenemar at redhat.com>
---
include/libvirt/virterror.h | 2 ++
src/bhyve/bhyve_driver.c | 2 +-
src/cpu/cpu.c | 10 ++++++----
src/cpu/cpu.h | 9 ++++++---
src/cpu/cpu_aarch64.c | 3 ++-
src/cpu/cpu_arm.c | 3 ++-
src/cpu/cpu_generic.c | 15 +++++++++++----
src/cpu/cpu_powerpc.c | 10 ++++++++--
src/cpu/cpu_x86.c | 20 ++++++++++++++++++--
src/qemu/qemu_driver.c | 2 +-
src/util/virerror.c | 6 ++++++
tests/cputest.c | 4 ++--
12 files changed, 65 insertions(+), 21 deletions(-)
diff --git a/include/libvirt/virterror.h b/include/libvirt/virterror.h
index be90797..15ba4f1 100644
--- a/include/libvirt/virterror.h
+++ b/include/libvirt/virterror.h
@@ -300,6 +300,8 @@ typedef enum {
was denied */
VIR_ERR_DBUS_SERVICE = 89, /* error from a dbus service */
VIR_ERR_STORAGE_VOL_EXIST = 90, /* the storage vol already exists */
+ VIR_ERR_CPU_INCOMPATIBLE = 91, /* given CPU is incompatible with host
+ CPU*/
} virErrorNumber;
/**
diff --git a/src/bhyve/bhyve_driver.c b/src/bhyve/bhyve_driver.c
index bb9bcb7..9bece84 100644
--- a/src/bhyve/bhyve_driver.c
+++ b/src/bhyve/bhyve_driver.c
@@ -1332,7 +1332,7 @@ bhyveConnectCompareCPU(virConnectPtr conn,
VIR_WARN("cannot get host CPU capabilities");
ret = VIR_CPU_COMPARE_INCOMPATIBLE;
} else {
- ret = cpuCompareXML(caps->host.cpu, xmlDesc);
+ ret = cpuCompareXML(caps->host.cpu, xmlDesc, false);
}
cleanup:
diff --git a/src/cpu/cpu.c b/src/cpu/cpu.c
index c3d66dd..08bec5e 100644
--- a/src/cpu/cpu.c
+++ b/src/cpu/cpu.c
@@ -92,7 +92,8 @@ cpuGetSubDriver(virArch arch)
*/
virCPUCompareResult
cpuCompareXML(virCPUDefPtr host,
- const char *xml)
+ const char *xml,
+ bool failIncompatible)
{
xmlDocPtr doc = NULL;
xmlXPathContextPtr ctxt = NULL;
@@ -108,7 +109,7 @@ cpuCompareXML(virCPUDefPtr host,
if (cpu == NULL)
goto cleanup;
- ret = cpuCompare(host, cpu);
+ ret = cpuCompare(host, cpu, failIncompatible);
cleanup:
virCPUDefFree(cpu);
@@ -134,7 +135,8 @@ cpuCompareXML(virCPUDefPtr host,
*/
virCPUCompareResult
cpuCompare(virCPUDefPtr host,
- virCPUDefPtr cpu)
+ virCPUDefPtr cpu,
+ bool failIncompatible)
{
struct cpuArchDriver *driver;
@@ -156,7 +158,7 @@ cpuCompare(virCPUDefPtr host,
return VIR_CPU_COMPARE_ERROR;
}
- return driver->compare(host, cpu);
+ return driver->compare(host, cpu, failIncompatible);
}
diff --git a/src/cpu/cpu.h b/src/cpu/cpu.h
index e9f2713..339964c 100644
--- a/src/cpu/cpu.h
+++ b/src/cpu/cpu.h
@@ -46,7 +46,8 @@ struct _virCPUData {
typedef virCPUCompareResult
(*cpuArchCompare) (virCPUDefPtr host,
- virCPUDefPtr cpu);
+ virCPUDefPtr cpu,
+ bool failIncompatible);
typedef int
(*cpuArchDecode) (virCPUDefPtr cpu,
@@ -119,12 +120,14 @@ struct cpuArchDriver {
extern virCPUCompareResult
cpuCompareXML(virCPUDefPtr host,
- const char *xml)
+ const char *xml,
+ bool failIncompatible)
ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2);
extern virCPUCompareResult
cpuCompare (virCPUDefPtr host,
- virCPUDefPtr cpu)
+ virCPUDefPtr cpu,
+ bool failIncompatible)
ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2);
extern int
diff --git a/src/cpu/cpu_aarch64.c b/src/cpu/cpu_aarch64.c
index 7255d9f..6346f9b 100644
--- a/src/cpu/cpu_aarch64.c
+++ b/src/cpu/cpu_aarch64.c
@@ -110,7 +110,8 @@ AArch64Baseline(virCPUDefPtr *cpus,
static virCPUCompareResult
AArch64Compare(virCPUDefPtr host ATTRIBUTE_UNUSED,
- virCPUDefPtr cpu ATTRIBUTE_UNUSED)
+ virCPUDefPtr cpu ATTRIBUTE_UNUSED,
+ bool failIncompatible ATTRIBUTE_UNUSED)
{
return VIR_CPU_COMPARE_IDENTICAL;
}
diff --git a/src/cpu/cpu_arm.c b/src/cpu/cpu_arm.c
index 39e8f12..ec755bd 100644
--- a/src/cpu/cpu_arm.c
+++ b/src/cpu/cpu_arm.c
@@ -113,7 +113,8 @@ ArmBaseline(virCPUDefPtr *cpus,
static virCPUCompareResult
ArmCompare(virCPUDefPtr host ATTRIBUTE_UNUSED,
- virCPUDefPtr cpu ATTRIBUTE_UNUSED)
+ virCPUDefPtr cpu ATTRIBUTE_UNUSED,
+ bool failMessages ATTRIBUTE_UNUSED)
{
return VIR_CPU_COMPARE_IDENTICAL;
}
diff --git a/src/cpu/cpu_generic.c b/src/cpu/cpu_generic.c
index f115c40..d6890c0 100644
--- a/src/cpu/cpu_generic.c
+++ b/src/cpu/cpu_generic.c
@@ -57,17 +57,20 @@ genericHashFeatures(virCPUDefPtr cpu)
static virCPUCompareResult
genericCompare(virCPUDefPtr host,
- virCPUDefPtr cpu)
+ virCPUDefPtr cpu,
+ bool failIncompatible)
{
- virHashTablePtr hash;
+ virHashTablePtr hash = NULL;
virCPUCompareResult ret = VIR_CPU_COMPARE_ERROR;
size_t i;
unsigned int reqfeatures;
if ((cpu->arch != VIR_ARCH_NONE &&
host->arch != cpu->arch) ||
- STRNEQ(host->model, cpu->model))
- return VIR_CPU_COMPARE_INCOMPATIBLE;
+ STRNEQ(host->model, cpu->model)) {
+ ret = VIR_CPU_COMPARE_INCOMPATIBLE;
+ goto cleanup;
+ }
if ((hash = genericHashFeatures(host)) == NULL)
goto cleanup;
@@ -102,6 +105,10 @@ genericCompare(virCPUDefPtr host,
cleanup:
virHashFree(hash);
+ if (failIncompatible && ret == VIR_CPU_COMPARE_INCOMPATIBLE) {
+ ret = VIR_CPU_COMPARE_ERROR;
+ virReportError(VIR_ERR_CPU_INCOMPATIBLE, NULL);
+ }
return ret;
}
diff --git a/src/cpu/cpu_powerpc.c b/src/cpu/cpu_powerpc.c
index 05fa55b..67cb9ff 100644
--- a/src/cpu/cpu_powerpc.c
+++ b/src/cpu/cpu_powerpc.c
@@ -440,13 +440,19 @@ ppcCompute(virCPUDefPtr host,
static virCPUCompareResult
ppcCompare(virCPUDefPtr host,
- virCPUDefPtr cpu)
+ virCPUDefPtr cpu,
+ bool failIncompatible)
{
if ((cpu->arch == VIR_ARCH_NONE || host->arch == cpu->arch) &&
STREQ(host->model, cpu->model))
return VIR_CPU_COMPARE_IDENTICAL;
- return VIR_CPU_COMPARE_INCOMPATIBLE;
+ if (failIncompatible) {
+ virReportError(VIR_ERR_CPU_INCOMPATIBLE, NULL);
+ return VIR_CPU_COMPARE_ERROR;
+ } else {
+ return VIR_CPU_COMPARE_INCOMPATIBLE;
+ }
}
static int
diff --git a/src/cpu/cpu_x86.c b/src/cpu/cpu_x86.c
index 72c5216..235fa49 100644
--- a/src/cpu/cpu_x86.c
+++ b/src/cpu/cpu_x86.c
@@ -1463,9 +1463,25 @@ x86Compute(virCPUDefPtr host,
static virCPUCompareResult
x86Compare(virCPUDefPtr host,
- virCPUDefPtr cpu)
+ virCPUDefPtr cpu,
+ bool failIncomaptible)
{
- return x86Compute(host, cpu, NULL, NULL);
+ virCPUCompareResult ret;
+ char *message = NULL;
+
+ ret = x86Compute(host, cpu, NULL, &message);
+
+ if (failIncomaptible && ret == VIR_CPU_COMPARE_INCOMPATIBLE) {
+ ret = VIR_CPU_COMPARE_ERROR;
+ if (message) {
+ virReportError(VIR_ERR_CPU_INCOMPATIBLE, "%s", message);
+ } else {
+ virReportError(VIR_ERR_CPU_INCOMPATIBLE, NULL);
+ }
+ }
+ VIR_FREE(message);
+
+ return ret;
}
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 22699c1..3c23fc7 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -11528,7 +11528,7 @@ qemuConnectCompareCPU(virConnectPtr conn,
VIR_WARN("cannot get host CPU capabilities");
ret = VIR_CPU_COMPARE_INCOMPATIBLE;
} else {
- ret = cpuCompareXML(caps->host.cpu, xmlDesc);
+ ret = cpuCompareXML(caps->host.cpu, xmlDesc, false);
}
cleanup:
diff --git a/src/util/virerror.c b/src/util/virerror.c
index e0bc970..6bd3d09 100644
--- a/src/util/virerror.c
+++ b/src/util/virerror.c
@@ -1277,6 +1277,12 @@ virErrorMsg(virErrorNumber error, const char *info)
else
errmsg = _("error from service: %s");
break;
+ case VIR_ERR_CPU_INCOMPATIBLE:
+ if (info == NULL)
+ errmsg = _("the CPU is incompatible with host CPU");
+ else
+ errmsg = _("the CPU is incompatible with host CPU: %s");
+ break;
}
return errmsg;
}
diff --git a/tests/cputest.c b/tests/cputest.c
index 3766c2f..38cd71e 100644
--- a/tests/cputest.c
+++ b/tests/cputest.c
@@ -228,7 +228,7 @@ cpuTestCompare(const void *arg)
!(cpu = cpuTestLoadXML(data->arch, data->name)))
goto cleanup;
- result = cpuCompare(host, cpu);
+ result = cpuCompare(host, cpu, false);
if (data->result == VIR_CPU_COMPARE_ERROR)
virResetLastError();
@@ -357,7 +357,7 @@ cpuTestBaseline(const void *arg)
for (i = 0; i < ncpus; i++) {
virCPUCompareResult cmp;
- cmp = cpuCompare(cpus[i], baseline);
+ cmp = cpuCompare(cpus[i], baseline, false);
if (cmp != VIR_CPU_COMPARE_SUPERSET &&
cmp != VIR_CPU_COMPARE_IDENTICAL) {
if (virTestGetVerbose()) {
--
2.0.0
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