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/*
* Copyright (C) 2010 Advanced Micro Devices
* Author Christoph Egger <Christoph.Egger@amd.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; version 2.1 only.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*/
#include "libxl_osdeps.h" /* must come before any other headers */
#include "libxl_internal.h"
#include "tap-ctl.h"
int libxl__blktap_enabled(libxl__gc *gc)
{
const char *msg;
return !tap_ctl_check(&msg);
}
char *libxl__blktap_devpath(libxl__gc *gc,
const char *disk,
libxl_disk_format format)
{
const char *type;
char *params, *devname = NULL;
tap_list_t tap;
int err;
type = libxl__device_disk_string_of_format(format);
err = tap_ctl_find(type, disk, &tap);
if (err == 0) {
devname = libxl__sprintf(gc, "/dev/xen/blktap-2/tapdev%d", tap.minor);
if (devname)
return devname;
}
params = libxl__sprintf(gc, "%s:%s", type, disk);
err = tap_ctl_create(params, &devname);
if (!err) {
libxl__ptr_add(gc, devname);
return devname;
}
return NULL;
}
void libxl__device_destroy_tapdisk(libxl__gc *gc, char *be_path)
{
char *path, *params, *type, *disk;
int err;
tap_list_t tap;
path = libxl__sprintf(gc, "%s/tapdisk-params", be_path);
if (!path) return;
params = libxl__xs_read(gc, XBT_NULL, path);
if (!params) return;
type = params;
disk = strchr(params, ':');
if (!disk) return;
*disk++ = '\0';
err = tap_ctl_find(type, disk, &tap);
if (err < 0) return;
tap_ctl_destroy(tap.id, tap.minor);
}
/*
* Local variables:
* mode: C
* c-basic-offset: 4
* indent-tabs-mode: nil
* End:
*/
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