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virQEMUBuildCommandLineJSON: Allow skipping certain keys

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Allow reusing this for formatting of netdev_add arguments into -netdev.
We need to be able to skip the 'type' property as it's used without the
prefix by our generator.

Add infrastructure which allows skipping property with a specific name.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Peter Krempa 2020-05-14 09:41:48 +02:00
parent 54e4328295
commit 220751091f
3 changed files with 29 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
src/util/virqemu.c
View File

@ -36,6 +36,7 @@ VIR_LOG_INIT("util.qemu");
struct virQEMUCommandLineJSONIteratorData {
const char *prefix;
virBufferPtr buf;
const char *skipKey;
virQEMUBuildCommandLineJSONArrayFormatFunc arrayFunc;
};
@ -44,6 +45,7 @@ static int
virQEMUBuildCommandLineJSONRecurse(const char *key,
virJSONValuePtr value,
virBufferPtr buf,
const char *skipKey,
virQEMUBuildCommandLineJSONArrayFormatFunc arrayFunc,
bool nested);
@ -52,7 +54,8 @@ virQEMUBuildCommandLineJSONRecurse(const char *key,
int
virQEMUBuildCommandLineJSONArrayBitmap(const char *key,
virJSONValuePtr array,
virBufferPtr buf)
virBufferPtr buf,
const char *skipKey G_GNUC_UNUSED)
{
ssize_t pos = -1;
ssize_t end;
@ -80,7 +83,8 @@ virQEMUBuildCommandLineJSONArrayBitmap(const char *key,
int
virQEMUBuildCommandLineJSONArrayNumbered(const char *key,
virJSONValuePtr array,
virBufferPtr buf)
virBufferPtr buf,
const char *skipKey)
{
virJSONValuePtr member;
size_t i;
@ -91,7 +95,7 @@ virQEMUBuildCommandLineJSONArrayNumbered(const char *key,
prefix = g_strdup_printf("%s.%zu", key, i);
if (virQEMUBuildCommandLineJSONRecurse(prefix, member, buf,
if (virQEMUBuildCommandLineJSONRecurse(prefix, member, buf, skipKey,
virQEMUBuildCommandLineJSONArrayNumbered,
true) < 0)
return 0;
@ -109,15 +113,20 @@ virQEMUBuildCommandLineJSONIterate(const char *key,
{
struct virQEMUCommandLineJSONIteratorData *data = opaque;
if (STREQ_NULLABLE(key, data->skipKey))
return 0;
if (data->prefix) {
g_autofree char *tmpkey = NULL;
tmpkey = g_strdup_printf("%s.%s", data->prefix, key);
return virQEMUBuildCommandLineJSONRecurse(tmpkey, value, data->buf,
data->skipKey,
data->arrayFunc, false);
} else {
return virQEMUBuildCommandLineJSONRecurse(key, value, data->buf,
data->skipKey,
data->arrayFunc, false);
}
}
@ -127,10 +136,11 @@ static int
virQEMUBuildCommandLineJSONRecurse(const char *key,
virJSONValuePtr value,
virBufferPtr buf,
const char *skipKey,
virQEMUBuildCommandLineJSONArrayFormatFunc arrayFunc,
bool nested)
{
struct virQEMUCommandLineJSONIteratorData data = { key, buf, arrayFunc };
struct virQEMUCommandLineJSONIteratorData data = { key, buf, skipKey, arrayFunc };
virJSONType type = virJSONValueGetType(value);
virJSONValuePtr elem;
bool tmp;
@ -170,14 +180,14 @@ virQEMUBuildCommandLineJSONRecurse(const char *key,
return -1;
}
if (!arrayFunc || arrayFunc(key, value, buf) < 0) {
if (!arrayFunc || arrayFunc(key, value, buf, skipKey) < 0) {
/* fallback, treat the array as a non-bitmap, adding the key
* for each member */
for (i = 0; i < virJSONValueArraySize(value); i++) {
elem = virJSONValueArrayGet((virJSONValuePtr)value, i);
/* recurse to avoid duplicating code */
if (virQEMUBuildCommandLineJSONRecurse(key, elem, buf,
if (virQEMUBuildCommandLineJSONRecurse(key, elem, buf, skipKey,
arrayFunc, true) < 0)
return -1;
}
@ -205,6 +215,7 @@ virQEMUBuildCommandLineJSONRecurse(const char *key,
* virQEMUBuildCommandLineJSON:
* @value: json object containing the value
* @buf: otuput buffer
* @skipKey: name of key that will be handled separately by caller
* @arrayFunc: array formatter function to allow for different syntax
*
* Formats JSON value object into command line parameters suitable for use with
@ -215,9 +226,10 @@ virQEMUBuildCommandLineJSONRecurse(const char *key,
int
virQEMUBuildCommandLineJSON(virJSONValuePtr value,
virBufferPtr buf,
const char *skipKey,
virQEMUBuildCommandLineJSONArrayFormatFunc array)
{
if (virQEMUBuildCommandLineJSONRecurse(NULL, value, buf, array, false) < 0)
if (virQEMUBuildCommandLineJSONRecurse(NULL, value, buf, skipKey, array, false) < 0)
return -1;
virBufferTrim(buf, ",");
@ -243,7 +255,7 @@ virQEMUBuildObjectCommandlineFromJSONInternal(virBufferPtr buf,
if (props) {
virBufferAddLit(buf, ",");
if (virQEMUBuildCommandLineJSON(props, buf,
if (virQEMUBuildCommandLineJSON(props, buf, NULL,
virQEMUBuildCommandLineJSONArrayBitmap) < 0)
return -1;
}
@ -270,7 +282,7 @@ virQEMUBuildDriveCommandlineFromJSON(virJSONValuePtr srcdef)
virBuffer buf = VIR_BUFFER_INITIALIZER;
char *ret = NULL;
if (virQEMUBuildCommandLineJSON(srcdef, &buf,
if (virQEMUBuildCommandLineJSON(srcdef, &buf, NULL,
virQEMUBuildCommandLineJSONArrayNumbered) < 0)
goto cleanup;

10
src/util/virqemu.h
View File

@ -29,16 +29,20 @@
typedef int (*virQEMUBuildCommandLineJSONArrayFormatFunc)(const char *key,
virJSONValuePtr array,
virBufferPtr buf);
virBufferPtr buf,
const char *skipKey);
int virQEMUBuildCommandLineJSONArrayBitmap(const char *key,
virJSONValuePtr array,
virBufferPtr buf);
virBufferPtr buf,
const char *skipKey);
int virQEMUBuildCommandLineJSONArrayNumbered(const char *key,
virJSONValuePtr array,
virBufferPtr buf);
virBufferPtr buf,
const char *skipKey);
int virQEMUBuildCommandLineJSON(virJSONValuePtr value,
virBufferPtr buf,
const char *skipKey,
virQEMUBuildCommandLineJSONArrayFormatFunc array);
int virQEMUBuildObjectCommandlineFromJSON(virBufferPtr buf,

2
tests/qemucommandutiltest.c
View File

@ -47,7 +47,7 @@ testQemuCommandBuildFromJSON(const void *opaque)
return -1;
}
if (virQEMUBuildCommandLineJSON(val, &buf, data->arrayfunc) < 0) {
if (virQEMUBuildCommandLineJSON(val, &buf, NULL, data->arrayfunc) < 0) {
fprintf(stderr,
"\nvirQEMUBuildCommandlineJSON failed process JSON:\n%s\n",
data->props);