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52 lines
1.4 KiB
C
52 lines
1.4 KiB
C
/*
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* Copyright (C) 2010 Advanced Micro Devices
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* Author Christoph Egger <Christoph.Egger@amd.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published
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* by the Free Software Foundation; version 2.1 only.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*/
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#include "libxl.h"
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#include "libxl_osdeps.h"
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#include "libxl_internal.h"
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#include "tap-ctl.h"
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int libxl_blktap_enabled(libxl_gc *gc)
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{
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const char *msg;
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return !tap_ctl_check(&msg);
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}
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const char *libxl_blktap_devpath(libxl_gc *gc,
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const char *disk,
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libxl_disk_phystype phystype)
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{
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const char *type;
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char *params, *devname = NULL;
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int minor, err;
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type = device_disk_string_of_phystype(phystype);
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minor = tap_ctl_find_minor(type, disk);
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if (minor >= 0) {
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devname = libxl_sprintf(gc, "/dev/xen/blktap-2/tapdev%d", minor);
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if (devname)
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return devname;
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}
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params = libxl_sprintf(gc, "%s:%s", type, disk);
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err = tap_ctl_create(params, &devname);
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if (!err) {
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libxl_ptr_add(gc, devname);
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return devname;
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}
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return NULL;
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}
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