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vhost-user: split vhost_user_read() 

Split vhost_user_read(), so only header can be read with
vhost_user_read_header().

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20190308140454.32437-8-marcandre.lureau@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Marc-André Lureau 2019-03-08 15:04:49 +01:00 committed by Michael S. Tsirkin
parent 917d7dd72a
commit 9af84c02e2
1 changed files with 19 additions and 8 deletions
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27
hw/virtio/vhost-user.c
View File

@ -214,7 +214,7 @@ static bool ioeventfd_enabled(void)
return !kvm_enabled() || kvm_eventfds_enabled();
}
static int vhost_user_read(struct vhost_dev *dev, VhostUserMsg *msg)
static int vhost_user_read_header(struct vhost_dev *dev, VhostUserMsg *msg)
{
struct vhost_user *u = dev->opaque;
CharBackend *chr = u->user->chr;
@ -225,7 +225,7 @@ static int vhost_user_read(struct vhost_dev *dev, VhostUserMsg *msg)
if (r != size) {
error_report("Failed to read msg header. Read %d instead of %d."
" Original request %d.", r, size, msg->hdr.request);
goto fail;
return -1;
}
/* validate received flags */
@ -233,7 +233,21 @@ static int vhost_user_read(struct vhost_dev *dev, VhostUserMsg *msg)
error_report("Failed to read msg header."
" Flags 0x%x instead of 0x%x.", msg->hdr.flags,
VHOST_USER_REPLY_MASK | VHOST_USER_VERSION);
goto fail;
return -1;
}
return 0;
}
static int vhost_user_read(struct vhost_dev *dev, VhostUserMsg *msg)
{
struct vhost_user *u = dev->opaque;
CharBackend *chr = u->user->chr;
uint8_t *p = (uint8_t *) msg;
int r, size;
if (vhost_user_read_header(dev, msg) < 0) {
return -1;
}
/* validate message size is sane */
@ -241,7 +255,7 @@ static int vhost_user_read(struct vhost_dev *dev, VhostUserMsg *msg)
error_report("Failed to read msg header."
" Size %d exceeds the maximum %zu.", msg->hdr.size,
VHOST_USER_PAYLOAD_SIZE);
goto fail;
return -1;
}
if (msg->hdr.size) {
@ -251,14 +265,11 @@ static int vhost_user_read(struct vhost_dev *dev, VhostUserMsg *msg)
if (r != size) {
error_report("Failed to read msg payload."
" Read %d instead of %d.", r, msg->hdr.size);
goto fail;
return -1;
}
}
return 0;
fail:
return -1;
}
static int process_message_reply(struct vhost_dev *dev,