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vhost-user: Don't pass file descriptor for VHOST_USER_REM_MEM_REG

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The spec clarifies now that QEMU should not send a file descriptor in a
request to remove a memory region. Change it accordingly.

For libvhost-user, this is a bug fix that makes it compatible with
rust-vmm's implementation that doesn't send a file descriptor. Keep
accepting, but ignoring a file descriptor for compatibility with older
QEMU versions.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20220407133657.155281-4-kwolf@redhat.com>
Reviewed-by: Raphael Norwitz <raphael.norwitz@nutanix.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Kevin Wolf 2022-04-07 15:36:57 +02:00
parent 5ebfdeb212
commit a81d8d4a72
2 changed files with 5 additions and 5 deletions
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2
hw/virtio/vhost-user.c
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@ -751,7 +751,7 @@ static int send_remove_regions(struct vhost_dev *dev,
vhost_user_fill_msg_region(&region_buffer, shadow_reg, 0);
msg->payload.mem_reg.region = region_buffer;
ret = vhost_user_write(dev, msg, &fd, 1);
ret = vhost_user_write(dev, msg, NULL, 0);
if (ret < 0) {
return ret;
}