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ch_monitor: Update virCHMonitorGet to handle accept a response

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The virCHMonitorGet function needed to be able to return data from the
hypervisor. This functionality is needed in order for the driver to
support PTY enablement and getting details about the VM state.

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: William Douglas <william.douglas@intel.com>
This commit is contained in:
William Douglas 2021-09-08 11:01:17 -07:00 committed by Daniel P. Berrangé
parent f84286c0b3
commit e727cc8041
1 changed files with 48 additions and 3 deletions
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51
src/ch/ch_monitor.c
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@ -54,7 +54,7 @@ VIR_ONCE_GLOBAL_INIT(virCHMonitor);
int virCHMonitorShutdownVMM(virCHMonitor *mon);
int virCHMonitorPutNoContent(virCHMonitor *mon, const char *endpoint);
int virCHMonitorGet(virCHMonitor *mon, const char *endpoint);
int virCHMonitorGet(virCHMonitor *mon, const char *endpoint, virJSONValue **response);
static int
virCHMonitorBuildCPUJson(virJSONValue *content, virDomainDef *vmdef)
@ -612,12 +612,36 @@ virCHMonitorPutNoContent(virCHMonitor *mon, const char *endpoint)
return ret;
}
struct curl_data {
char *content;
size_t size;
};
static size_t
curl_callback(void *contents, size_t size, size_t nmemb, void *userp)
{
size_t content_size = size * nmemb;
struct curl_data *data = userp;
if (content_size == 0)
return content_size;
data->content = g_realloc(data->content, data->size + content_size);
memcpy(&(data->content[data->size]), contents, content_size);
data->size += content_size;
return content_size;
}
int
virCHMonitorGet(virCHMonitor *mon, const char *endpoint)
virCHMonitorGet(virCHMonitor *mon, const char *endpoint, virJSONValue **response)
{
g_autofree char *url = NULL;
int responseCode = 0;
int ret = -1;
struct curl_slist *headers = NULL;
struct curl_data data = {0};
url = g_strdup_printf("%s/%s", URL_ROOT, endpoint);
@ -629,12 +653,33 @@ virCHMonitorGet(virCHMonitor *mon, const char *endpoint)
curl_easy_setopt(mon->handle, CURLOPT_UNIX_SOCKET_PATH, mon->socketpath);
curl_easy_setopt(mon->handle, CURLOPT_URL, url);
if (response) {
headers = curl_slist_append(headers, "Accept: application/json");
headers = curl_slist_append(headers, "Content-Type: application/json");
curl_easy_setopt(mon->handle, CURLOPT_HTTPHEADER, headers);
curl_easy_setopt(mon->handle, CURLOPT_WRITEFUNCTION, curl_callback);
curl_easy_setopt(mon->handle, CURLOPT_WRITEDATA, (void *)&data);
}
responseCode = virCHMonitorCurlPerform(mon->handle);
virObjectUnlock(mon);
if (responseCode == 200 || responseCode == 204)
if (responseCode == 200 || responseCode == 204) {
if (response) {
data.content = g_realloc(data.content, data.size + 1);
data.content[data.size] = 0;
*response = virJSONValueFromString(data.content);
if (!*response)
goto cleanup;
}
ret = 0;
}
cleanup:
g_free(data.content);
/* reset the libcurl handle to avoid leaking a stack pointer to data */
curl_easy_reset(mon->handle);
return ret;
}