[libvirt] [PATCH] domaincaps: Expose UEFI binary path, if it exists
Cole Robinson
crobinso at redhat.com
Tue Sep 16 23:52:54 UTC 2014
Check to see if the UEFI binary mentioned in qemu.conf actually
exists, and if so expose it in domcapabilities like
<loader ...>
<value>/path/to/ovmf</value>
</loader>
We introduce some generic domcaps infrastructure for handling
a dynamic list of string values, it may be of use for future bits.
---
docs/formatdomaincaps.html.in | 6 ++++
docs/schemas/domaincaps.rng | 17 ++++++---
src/conf/domain_capabilities.c | 23 ++++++++++++
src/conf/domain_capabilities.h | 8 +++++
src/qemu/qemu_driver.c | 24 +++++++++++++
tests/domaincapsschemadata/domaincaps-full.xml | 1 +
tests/domaincapstest.c | 49 +++++++++++++++++++++-----
7 files changed, 115 insertions(+), 13 deletions(-)
diff --git a/docs/formatdomaincaps.html.in b/docs/formatdomaincaps.html.in
index 34d746d..6959dfe 100644
--- a/docs/formatdomaincaps.html.in
+++ b/docs/formatdomaincaps.html.in
@@ -105,6 +105,7 @@
...
<os supported='yes'>
<loader supported='yes'>
+ <value>/usr/share/OVMF/OVMF_CODE.fd</value>
<enum name='type'>
<value>rom</value>
<value>pflash</value>
@@ -122,6 +123,11 @@
<p>For the <code>loader</code> element, the following can occur:</p>
<dl>
+ <dt>value</dt>
+ <dd>List of known loader paths. Currently this is only used
+ to advertise known locations of OVMF binaries for qemu. Binaries
+ will only be listed if they actually exist on disk.</dd>
+
<dt>type</dt>
<dd>Whether loader is a typical BIOS (<code>rom</code>) or
an UEFI binary (<code>pflash</code>). This refers to
diff --git a/docs/schemas/domaincaps.rng b/docs/schemas/domaincaps.rng
index ad8d966..dfdb9b9 100644
--- a/docs/schemas/domaincaps.rng
+++ b/docs/schemas/domaincaps.rng
@@ -46,6 +46,9 @@
<define name='loader'>
<element name='loader'>
+ <optional>
+ <ref name='value'/>
+ </optional>
<ref name='supported'/>
<ref name='enum'/>
</element>
@@ -85,6 +88,14 @@
</element>
</define>
+ <define name='value'>
+ <zeroOrMore>
+ <element name='value'>
+ <text/>
+ </element>
+ </zeroOrMore>
+ </define>
+
<define name='supported'>
<attribute name='supported'>
<choice>
@@ -100,11 +111,7 @@
<attribute name='name'>
<text/>
</attribute>
- <zeroOrMore>
- <element name='value'>
- <text/>
- </element>
- </zeroOrMore>
+ <ref name='value'/>
</element>
</zeroOrMore>
</define>
diff --git a/src/conf/domain_capabilities.c b/src/conf/domain_capabilities.c
index 5a3c8e7..44e422a 100644
--- a/src/conf/domain_capabilities.c
+++ b/src/conf/domain_capabilities.c
@@ -46,6 +46,15 @@ static int virDomainCapsOnceInit(void)
VIR_ONCE_GLOBAL_INIT(virDomainCaps)
+static void
+virDomainCapsValuesFree(virDomainCapsValuesPtr values)
+{
+ size_t i;
+
+ for (i = 0; i < values->nvalues; i++) {
+ VIR_FREE(values->values[i]);
+ }
+}
static void
virDomainCapsDispose(void *obj)
@@ -54,6 +63,8 @@ virDomainCapsDispose(void *obj)
VIR_FREE(caps->path);
VIR_FREE(caps->machine);
+
+ virDomainCapsValuesFree(&caps->os.loader.values);
}
@@ -156,6 +167,17 @@ virDomainCapsEnumFormat(virBufferPtr buf,
return ret;
}
+static void
+virDomainCapsValuesFormat(virBufferPtr buf,
+ virDomainCapsValuesPtr values)
+{
+ size_t i;
+
+ for (i = 0; i < values->nvalues; i++) {
+ virBufferAsprintf(buf, "<value>%s</value>\n", values->values[i]);
+ }
+}
+
#define FORMAT_PROLOGUE(item) \
do { \
virBufferAsprintf(buf, "<" #item " supported='%s'%s\n", \
@@ -185,6 +207,7 @@ virDomainCapsLoaderFormat(virBufferPtr buf,
{
FORMAT_PROLOGUE(loader);
+ virDomainCapsValuesFormat(buf, &loader->values);
ENUM_PROCESS(loader, type, virDomainLoaderTypeToString);
ENUM_PROCESS(loader, readonly, virTristateBoolTypeToString);
diff --git a/src/conf/domain_capabilities.h b/src/conf/domain_capabilities.h
index 768646b..3d5aaa3 100644
--- a/src/conf/domain_capabilities.h
+++ b/src/conf/domain_capabilities.h
@@ -37,6 +37,13 @@ struct _virDomainCapsEnum {
unsigned int values; /* Bitmask of values supported in the corresponding enum */
};
+typedef struct _virDomainCapsValues virDomainCapsValues;
+typedef virDomainCapsValues *virDomainCapsValuesPtr;
+struct _virDomainCapsValues {
+ char **values; /* raw string values */
+ size_t nvalues; /* number of strings */
+};
+
typedef struct _virDomainCapsDevice virDomainCapsDevice;
typedef virDomainCapsDevice *virDomainCapsDevicePtr;
struct _virDomainCapsDevice {
@@ -47,6 +54,7 @@ typedef struct _virDomainCapsLoader virDomainCapsLoader;
typedef virDomainCapsLoader *virDomainCapsLoaderPtr;
struct _virDomainCapsLoader {
virDomainCapsDevice device;
+ virDomainCapsValues values;
virDomainCapsEnum type; /* Info about virDomainLoader */
virDomainCapsEnum readonly; /* Info about readonly:virTristateBool */
};
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 6008aeb..4dd9d14 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -17282,6 +17282,8 @@ qemuConnectGetDomainCapabilities(virConnectPtr conn,
int virttype; /* virDomainVirtType */
virDomainCapsPtr domCaps = NULL;
int arch = virArchFromHost(); /* virArch */
+ virQEMUDriverConfigPtr cfg = NULL;
+ size_t i;
virCheckFlags(0, ret);
@@ -17356,8 +17358,30 @@ qemuConnectGetDomainCapabilities(virConnectPtr conn,
virQEMUCapsFillDomainCaps(domCaps, qemuCaps);
+ cfg = virQEMUDriverGetConfig(driver);
+ for (i = 0; i < cfg->nloader; i++) {
+ char *filename = cfg->loader[i];
+
+ if (access(filename, F_OK) == 0) {
+ if (VIR_REALLOC_N(domCaps->os.loader.values.values,
+ domCaps->os.loader.values.nvalues + 1) < 0) {
+ goto cleanup;
+ }
+ domCaps->os.loader.values.nvalues++;
+
+ if (VIR_STRDUP(domCaps->os.loader.values.values[
+ domCaps->os.loader.values.nvalues - 1],
+ filename) < 0) {
+ goto cleanup;
+ }
+ } else {
+ VIR_DEBUG("loader filename=%s doesn't exist", filename);
+ }
+ }
+
ret = virDomainCapsFormat(domCaps);
cleanup:
+ virObjectUnref(cfg);
virObjectUnref(domCaps);
virObjectUnref(qemuCaps);
return ret;
diff --git a/tests/domaincapsschemadata/domaincaps-full.xml b/tests/domaincapsschemadata/domaincaps-full.xml
index 9722772..e7f41d7 100644
--- a/tests/domaincapsschemadata/domaincaps-full.xml
+++ b/tests/domaincapsschemadata/domaincaps-full.xml
@@ -6,6 +6,7 @@
<vcpu max='255'/>
<os supported='yes'>
<loader supported='yes'>
+ <value>/foo/test</value>
<enum name='type'>
<value>rom</value>
<value>pflash</value>
diff --git a/tests/domaincapstest.c b/tests/domaincapstest.c
index f240643..ddc4d02 100644
--- a/tests/domaincapstest.c
+++ b/tests/domaincapstest.c
@@ -28,16 +28,37 @@
#define VIR_FROM_THIS VIR_FROM_NONE
-typedef void (*virDomainCapsFill)(virDomainCapsPtr domCaps,
- void *opaque);
+typedef int (*virDomainCapsFill)(virDomainCapsPtr domCaps,
+ void *opaque);
#define SET_ALL_BITS(x) \
memset(&(x.values), 0xff, sizeof(x.values))
-static void
+static int
+fillValues(virDomainCapsValuesPtr values)
+{
+ int ret = -1;
+
+ if (VIR_ALLOC_N(values->values, 1) < 0) {
+ goto cleanup;
+ }
+ values->nvalues = 1;
+
+ if (VIR_STRDUP(values->values[0], "/foo/test") < 0) {
+ goto cleanup;
+ }
+
+ ret = 0;
+ cleanup:
+ return ret;
+}
+
+static int
fillAll(virDomainCapsPtr domCaps,
void *opaque ATTRIBUTE_UNUSED)
{
+ int ret = -1;
+
virDomainCapsOSPtr os = &domCaps->os;
virDomainCapsLoaderPtr loader = &os->loader;
virDomainCapsDeviceDiskPtr disk = &domCaps->disk;
@@ -49,6 +70,9 @@ fillAll(virDomainCapsPtr domCaps,
loader->device.supported = true;
SET_ALL_BITS(loader->type);
SET_ALL_BITS(loader->readonly);
+ if (fillValues(&loader->values) < 0) {
+ goto cleanup;
+ }
disk->device.supported = true;
SET_ALL_BITS(disk->diskDevice);
@@ -60,12 +84,16 @@ fillAll(virDomainCapsPtr domCaps,
SET_ALL_BITS(hostdev->subsysType);
SET_ALL_BITS(hostdev->capsType);
SET_ALL_BITS(hostdev->pciBackend);
+
+ ret = 0;
+ cleanup:
+ return ret;
}
#ifdef WITH_QEMU
# include "testutilsqemu.h"
-static void
+static int
fillQemuCaps(virDomainCapsPtr domCaps,
void *opaque)
{
@@ -82,6 +110,8 @@ fillQemuCaps(virDomainCapsPtr domCaps,
VIR_DOMAIN_HOSTDEV_PCI_BACKEND_DEFAULT,
VIR_DOMAIN_HOSTDEV_PCI_BACKEND_KVM,
VIR_DOMAIN_HOSTDEV_PCI_BACKEND_VFIO);
+
+ return 0;
}
#endif /* WITH_QEMU */
@@ -94,16 +124,19 @@ buildVirDomainCaps(const char *emulatorbin,
virDomainCapsFill fillFunc,
void *opaque)
{
- virDomainCapsPtr domCaps;
+ virDomainCapsPtr domCaps, ret = NULL;
if (!(domCaps = virDomainCapsNew(emulatorbin, machine, arch, type)))
goto cleanup;
- if (fillFunc)
- fillFunc(domCaps, opaque);
+ if (fillFunc && fillFunc(domCaps, opaque) < 0) {
+ virObjectUnref(domCaps);
+ goto cleanup;
+ }
+ ret = domCaps;
cleanup:
- return domCaps;
+ return ret;
}
struct test_virDomainCapsFormatData {
--
2.1.0
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