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#include "kvm/guest_compat.h"
#include "kvm/mutex.h"
#include <linux/kernel.h>
#include <linux/list.h>
struct compat_message {
int id;
char *title;
char *desc;
struct list_head list;
};
static int id;
static DEFINE_MUTEX(compat_mtx);
static LIST_HEAD(messages);
static void compat__free(struct compat_message *msg)
{
free(msg->title);
free(msg->desc);
free(msg);
}
int compat__add_message(const char *title, const char *desc)
{
struct compat_message *msg;
int msg_id;
msg = malloc(sizeof(*msg));
if (msg == NULL)
goto cleanup;
msg->title = strdup(title);
msg->desc = strdup(desc);
if (msg->title == NULL || msg->desc == NULL)
goto cleanup;
mutex_lock(&compat_mtx);
msg->id = msg_id = id++;
list_add_tail(&msg->list, &messages);
mutex_unlock(&compat_mtx);
return msg_id;
cleanup:
if (msg)
compat__free(msg);
return -ENOMEM;
}
int compat__remove_message(int id)
{
struct compat_message *pos, *n;
mutex_lock(&compat_mtx);
list_for_each_entry_safe(pos, n, &messages, list) {
if (pos->id == id) {
list_del(&pos->list);
compat__free(pos);
mutex_unlock(&compat_mtx);
return 0;
}
}
mutex_unlock(&compat_mtx);
return -ENOENT;
}
int compat__print_all_messages(void)
{
mutex_lock(&compat_mtx);
while (!list_empty(&messages)) {
struct compat_message *msg;
msg = list_first_entry(&messages, struct compat_message, list);
printf("\n # KVM compatibility warning.\n\t%s\n\t%s\n",
msg->title, msg->desc);
list_del(&msg->list);
compat__free(msg);
}
mutex_unlock(&compat_mtx);
return 0;
}
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