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Date: Fri, 10 Jun 2016 00:16:09 +0000
From: KY Srinivasan <kys@...rosoft.com>
To: Linus Torvalds <torvalds@...ux-foundation.org>
CC: "davem@...emloft.net" <davem@...emloft.net>,
"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
lkml <linux-kernel@...r.kernel.org>,
"devel@...uxdriverproject.org" <devel@...uxdriverproject.org>,
"olaf@...fle.de" <olaf@...fle.de>,
"apw@...onical.com" <apw@...onical.com>,
"jasowang@...hat.com" <jasowang@...hat.com>,
"leann.ogasawara@...onical.com" <leann.ogasawara@...onical.com>
Subject: RE: [PATCH net-next] netvsc: Use the new in-place consumption APIs in
the rx path
> -----Original Message-----
> From: Linus Torvalds [mailto:torvalds@...ux-foundation.org]
> Sent: Thursday, June 9, 2016 5:12 PM
> To: KY Srinivasan <kys@...rosoft.com>
> Cc: davem@...emloft.net; netdev@...r.kernel.org; lkml <linux-
> kernel@...r.kernel.org>; devel@...uxdriverproject.org; olaf@...fle.de;
> apw@...onical.com; jasowang@...hat.com;
> leann.ogasawara@...onical.com
> Subject: Re: [PATCH net-next] netvsc: Use the new in-place consumption APIs in
> the rx path
>
> Srinivasan,
>
> these are all sent through linuxonhyperv.com, and fail DMARC because
> they have a microsoft.com address but no valid DKIM.
>
> Please fix your email setup. You need to go through the real
> microsoft smtp servers if you use a microsoft.com address. Or you need
> to get linuxonhyperv.com fixed as a smtp server with the proper MS
> email signing.
>
> Linus
Thanks Linus, we will fix our email setup.
Regards,
K. Y
>
> On Thu, Jun 9, 2016 at 6:34 PM, K. Y. Srinivasan <kys@...rosoft.com> wrote:
> > Use the new APIs for eliminating a copy on the receive path. These new APIs
> also
> > help in minimizing the number of memory barriers we end up issuing (in the
> > ringbuffer code) since we can better control when we want to expose the ring
> > state to the host.
> >
> > Signed-off-by: K. Y. Srinivasan <kys@...rosoft.com>
> > Reviewed-by: Haiyang Zhang <haiyangz@...rosoft.com>
> > Tested-by: Dexuan Cui <decui@...rosoft.com>
> > Tested-by: Simon Xiao <sixiao@...rosoft.com>
> > ---
> > drivers/net/hyperv/netvsc.c | 88 +++++++++++++++++++++++++++++---------
> -----
> > 1 files changed, 59 insertions(+), 29 deletions(-)
> >
> > diff --git a/drivers/net/hyperv/netvsc.c b/drivers/net/hyperv/netvsc.c
> > index 719cb35..8cd4c19 100644
> > --- a/drivers/net/hyperv/netvsc.c
> > +++ b/drivers/net/hyperv/netvsc.c
> > @@ -1141,6 +1141,39 @@ static inline void netvsc_receive_inband(struct
> hv_device *hdev,
> > }
> > }
> >
> > +static void netvsc_process_raw_pkt(struct hv_device *device,
> > + struct vmbus_channel *channel,
> > + struct netvsc_device *net_device,
> > + struct net_device *ndev,
> > + u64 request_id,
> > + struct vmpacket_descriptor *desc)
> > +{
> > + struct nvsp_message *nvmsg;
> > +
> > + nvmsg = (struct nvsp_message *)((unsigned long)
> > + desc + (desc->offset8 << 3));
> > +
> > + switch (desc->type) {
> > + case VM_PKT_COMP:
> > + netvsc_send_completion(net_device, channel, device, desc);
> > + break;
> > +
> > + case VM_PKT_DATA_USING_XFER_PAGES:
> > + netvsc_receive(net_device, channel, device, desc);
> > + break;
> > +
> > + case VM_PKT_DATA_INBAND:
> > + netvsc_receive_inband(device, net_device, nvmsg);
> > + break;
> > +
> > + default:
> > + netdev_err(ndev, "unhandled packet type %d, tid %llx\n",
> > + desc->type, request_id);
> > + break;
> > + }
> > +}
> > +
> > +
> > void netvsc_channel_cb(void *context)
> > {
> > int ret;
> > @@ -1153,7 +1186,7 @@ void netvsc_channel_cb(void *context)
> > unsigned char *buffer;
> > int bufferlen = NETVSC_PACKET_SIZE;
> > struct net_device *ndev;
> > - struct nvsp_message *nvmsg;
> > + bool need_to_commit = false;
> >
> > if (channel->primary_channel != NULL)
> > device = channel->primary_channel->device_obj;
> > @@ -1167,39 +1200,36 @@ void netvsc_channel_cb(void *context)
> > buffer = get_per_channel_state(channel);
> >
> > do {
> > + desc = get_next_pkt_raw(channel);
> > + if (desc != NULL) {
> > + netvsc_process_raw_pkt(device,
> > + channel,
> > + net_device,
> > + ndev,
> > + desc->trans_id,
> > + desc);
> > +
> > + put_pkt_raw(channel, desc);
> > + need_to_commit = true;
> > + continue;
> > + }
> > + if (need_to_commit) {
> > + need_to_commit = false;
> > + commit_rd_index(channel);
> > + }
> > +
> > ret = vmbus_recvpacket_raw(channel, buffer, bufferlen,
> > &bytes_recvd, &request_id);
> > if (ret == 0) {
> > if (bytes_recvd > 0) {
> > desc = (struct vmpacket_descriptor *)buffer;
> > - nvmsg = (struct nvsp_message *)((unsigned long)
> > - desc + (desc->offset8 << 3));
> > - switch (desc->type) {
> > - case VM_PKT_COMP:
> > - netvsc_send_completion(net_device,
> > - channel,
> > - device, desc);
> > - break;
> > -
> > - case VM_PKT_DATA_USING_XFER_PAGES:
> > - netvsc_receive(net_device, channel,
> > - device, desc);
> > - break;
> > -
> > - case VM_PKT_DATA_INBAND:
> > - netvsc_receive_inband(device,
> > - net_device,
> > - nvmsg);
> > - break;
> > -
> > - default:
> > - netdev_err(ndev,
> > - "unhandled packet type %d, "
> > - "tid %llx len %d\n",
> > - desc->type, request_id,
> > - bytes_recvd);
> > - break;
> > - }
> > + netvsc_process_raw_pkt(device,
> > + channel,
> > + net_device,
> > + ndev,
> > + request_id,
> > + desc);
> > +
> >
> > } else {
> > /*
> > --
> > 1.7.4.1
> >
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