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#
# Copyright (c) 2021 Nutanix Inc. All rights reserved.
#
# Authors: Swapnil Ingle <swapnil.ingle@nutanix.com>
#
# Redistribution and use in source and binary forms, with or without
# 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.
# * Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# * Neither the name of Nutanix nor the names of its contributors may be
# used to endorse or promote products derived from this software without
# specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
# DAMAGE.
#
import ctypes
import errno
from libvfio_user import *
import tempfile
ctx = None
def test_dma_sg_size():
size = dma_sg_size()
assert size == len(dma_sg_t())
def test_sgl_get_with_invalid_region():
global ctx
ctx = prepare_ctx_for_dma()
assert ctx is not None
sg = dma_sg_t()
iovec = iovec_t()
ret = vfu_sgl_get(ctx, sg, iovec)
assert ret == -1
assert ctypes.get_errno() == errno.EINVAL
def test_sgl_get_without_fd():
client = connect_client(ctx)
payload = vfio_user_dma_map(argsz=len(vfio_user_dma_map()),
flags=(VFIO_USER_F_DMA_REGION_READ |
VFIO_USER_F_DMA_REGION_WRITE),
offset=0, addr=0x1000, size=4096)
msg(ctx, client.sock, VFIO_USER_DMA_MAP, payload)
sg = dma_sg_t()
iovec = iovec_t()
sg.region = 0
ret = vfu_sgl_get(ctx, sg, iovec)
assert ret == -1
assert ctypes.get_errno() == errno.EFAULT
client.disconnect(ctx)
def test_get_multiple_sge():
client = connect_client(ctx)
regions = 4
f = tempfile.TemporaryFile()
f.truncate(0x1000 * regions)
for i in range(1, regions):
payload = vfio_user_dma_map(argsz=len(vfio_user_dma_map()),
flags=(VFIO_USER_F_DMA_REGION_READ |
VFIO_USER_F_DMA_REGION_WRITE),
offset=0, addr=0x1000 * i, size=4096)
msg(ctx, client.sock, VFIO_USER_DMA_MAP, payload, fds=[f.fileno()])
ret, sg = vfu_addr_to_sgl(ctx, dma_addr=0x1000, length=4096 * 3,
max_nr_sgs=3, prot=mmap.PROT_READ)
assert ret == 3
iovec = (iovec_t * 3)()
ret = vfu_sgl_get(ctx, sg, iovec, cnt=3)
assert ret == 0
assert iovec[0].iov_len == 4096
assert iovec[1].iov_len == 4096
assert iovec[2].iov_len == 4096
client.disconnect(ctx)
def test_sgl_put():
client = connect_client(ctx)
regions = 4
f = tempfile.TemporaryFile()
f.truncate(0x1000 * regions)
for i in range(1, regions):
payload = vfio_user_dma_map(argsz=len(vfio_user_dma_map()),
flags=(VFIO_USER_F_DMA_REGION_READ |
VFIO_USER_F_DMA_REGION_WRITE),
offset=0, addr=0x1000 * i, size=4096)
msg(ctx, client.sock, VFIO_USER_DMA_MAP, payload, fds=[f.fileno()])
ret, sg = vfu_addr_to_sgl(ctx, dma_addr=0x1000, length=4096 * 3,
max_nr_sgs=3, prot=mmap.PROT_READ)
assert ret == 3
iovec = (iovec_t * 3)()
ret = vfu_sgl_get(ctx, sg, iovec, cnt=3)
assert ret == 0
vfu_sgl_put(ctx, sg, iovec, cnt=3)
client.disconnect(ctx)
def test_sgl_get_put_cleanup():
vfu_destroy_ctx(ctx)
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