Re: [PATCH-v4-RESEND 1/4] vsock: track pkt owner vsock

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Fri, Mar 3, 2017 at 5:13 AM, David Miller <davem@xxxxxxxxxxxxx> wrote:
> From: Peng Tao <bergwolf@xxxxxxxxx>
> Date: Wed,  1 Mar 2017 11:56:24 +0800
>
>> So that we can cancel a queued pkt later if necessary.
>>
>> Reviewed-by: Stefan Hajnoczi <stefanha@xxxxxxxxxx>
>> Signed-off-by: Peng Tao <bergwolf@xxxxxxxxx>
>> ---
>>  include/linux/virtio_vsock.h            | 2 ++
>>  net/vmw_vsock/virtio_transport_common.c | 7 +++++++
>>  2 files changed, 9 insertions(+)
>>
>> diff --git a/include/linux/virtio_vsock.h b/include/linux/virtio_vsock.h
>> index 9638bfe..193ad3a 100644
>> --- a/include/linux/virtio_vsock.h
>> +++ b/include/linux/virtio_vsock.h
>> @@ -48,6 +48,7 @@ struct virtio_vsock_pkt {
>>       struct virtio_vsock_hdr hdr;
>>       struct work_struct work;
>>       struct list_head list;
>> +     void *cancel_token; /* only used for cancellation */
>
> The type here is fixed, you only store vhost_sock object pointers
> here, so don't use "void *" please.
It used to be "struct vhost_sock *" but no refcount is held. Stefan
suggested to use "void *cancel_token" to make the code harder to
misuse.

Quoting Stefan:
"This field is just an opaque token used for cancellation rather than
a struct vsock_sock pointer that we are allowed to dereference.  You
could change this field to void *cancel_token to make the code harder
to misuse."

Ref:
https://www.mail-archive.com/netdev@xxxxxxxxxxxxxxx/msg142550.html

Cheers,
Tao



[Index of Archives]     [KVM ARM]     [KVM ia64]     [KVM ppc]     [Virtualization Tools]     [Spice Development]     [Libvirt]     [Libvirt Users]     [Linux USB Devel]     [Linux Audio Users]     [Yosemite Questions]     [Linux Kernel]     [Linux SCSI]     [XFree86]

  Powered by Linux