#
# Copyright (c) 2021 Nutanix Inc. All rights reserved.
#
# Authors: John Levon <john.levon@nutanix.com>
#
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#  modification, are permitted provided that the following conditions are met:
#      * Redistributions of source code must retain the above copyright
#        notice, this list of conditions and the following disclaimer.
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#        notice, this list of conditions and the following disclaimer in the
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#        used to endorse or promote products derived from this software without
#        specific prior written permission.
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#  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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from libvfio_user import *
import ctypes as c
import errno
import tempfile

ctx = None

def test_device_set_irqs_setup():
    global ctx

    ctx = vfu_create_ctx(flags=LIBVFIO_USER_FLAG_ATTACH_NB)
    assert ctx != None

def test_setup_region_bad_mmap_areas():

    f = tempfile.TemporaryFile()
    f.truncate(65536)

    mmap_areas = [ (0x2000, 0x1000), (0x4000, 0x2000) ]

    ret = vfu_setup_region(ctx, index=VFU_PCI_DEV_BAR2_REGION_IDX, size=0x10000,
                           flags=(VFU_REGION_FLAG_RW | VFU_REGION_FLAG_MEM),
                           mmap_areas=mmap_areas, nr_mmap_areas=0,
                           fd=f.fileno())
    assert ret == -1
    assert c.get_errno() == errno.EINVAL

    ret = vfu_setup_region(ctx, index=VFU_PCI_DEV_BAR2_REGION_IDX, size=0x10000,
                           flags=(VFU_REGION_FLAG_RW | VFU_REGION_FLAG_MEM),
                           mmap_areas=None, nr_mmap_areas=1, fd=f.fileno())
    assert ret == -1
    assert c.get_errno() == errno.EINVAL

    ret = vfu_setup_region(ctx, index=VFU_PCI_DEV_BAR2_REGION_IDX, size=0x10000,
                           flags=(VFU_REGION_FLAG_RW | VFU_REGION_FLAG_MEM),
                           mmap_areas=mmap_areas, fd=-1)
    assert ret == -1
    assert c.get_errno() == errno.EINVAL

    mmap_areas = [ (0x2000, 0x1000), (0x4000, 0x2000) ]

    ret = vfu_setup_region(ctx, index=VFU_PCI_DEV_BAR2_REGION_IDX, size=0x5000,
                           flags=(VFU_REGION_FLAG_RW | VFU_REGION_FLAG_MEM),
                           mmap_areas=mmap_areas, fd=f.fileno())
    assert ret == -1
    assert c.get_errno() == errno.EINVAL

def test_setup_region_bad_index():
    ret = vfu_setup_region(ctx, index=-2, size=0x10000,
                           flags=(VFU_REGION_FLAG_RW | VFU_REGION_FLAG_MEM))
    assert ret == -1
    assert c.get_errno() == errno.EINVAL

    ret = vfu_setup_region(ctx, index=VFU_PCI_DEV_NUM_REGIONS, size=0x10000,
                           flags=(VFU_REGION_FLAG_RW | VFU_REGION_FLAG_MEM))
    assert ret == -1
    assert c.get_errno() == errno.EINVAL

def test_setup_region_bad_pci():
    ret = vfu_setup_region(ctx, index=VFU_PCI_DEV_CFG_REGION_IDX, size=0x1000,
                           flags=(VFU_REGION_FLAG_RW | VFU_REGION_FLAG_MEM))
    assert ret == -1
    assert c.get_errno() == errno.EINVAL

def test_setup_region_bad_migr():
    ret = vfu_setup_region(ctx, index=VFU_PCI_DEV_MIGR_REGION_IDX, size=512,
                           flags=(VFU_REGION_FLAG_RW | VFU_REGION_FLAG_MEM))
    assert ret == -1
    assert c.get_errno() == errno.EINVAL

    f = tempfile.TemporaryFile()
    f.truncate(0x2000)

    ret = vfu_setup_region(ctx, index=VFU_PCI_DEV_MIGR_REGION_IDX, size=0x2000,
                           flags=(VFU_REGION_FLAG_RW | VFU_REGION_FLAG_MEM),
                           fd=f.fileno())
    assert ret == -1
    assert c.get_errno() == errno.EINVAL

    mmap_areas = [ (0x0, 0x1000), (0x1000, 0x1000) ]

    ret = vfu_setup_region(ctx, index=VFU_PCI_DEV_MIGR_REGION_IDX, size=0x2000,
                           flags=(VFU_REGION_FLAG_RW | VFU_REGION_FLAG_MEM),
                           mmap_areas=mmap_areas, fd=f.fileno())
    assert ret == -1
    assert c.get_errno() == errno.EINVAL

def test_setup_region_cleanup():
    vfu_destroy_ctx(ctx)