linux-kernel - Re: [PATCH v4 3/4] drivers/net/virtio

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Date:   Fri, 4 Mar 2022 15:09:02 +0200
From:   Andrew Melnichenko <andrew@...nix.com>
To:     "Michael S. Tsirkin" <mst@...hat.com>
Cc:     kernel test robot <lkp@...el.com>,
        Network Development <netdev@...r.kernel.org>,
        virtualization <virtualization@...ts.linux-foundation.org>,
        LKML <linux-kernel@...r.kernel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Jason Wang <jasowang@...hat.com>, kbuild-all@...ts.01.org,
        Yan Vugenfirer <yan@...nix.com>,
        Yuri Benditovich <yuri.benditovich@...nix.com>
Subject: Re: [PATCH v4 3/4] drivers/net/virtio_net: Added RSS hash report.

Hi all,
Yes, I'll prepare a new commit later.

On Fri, Mar 4, 2022 at 10:08 AM Michael S. Tsirkin <mst@...hat.com> wrote:
>
> On Wed, Feb 23, 2022 at 03:15:28AM +0800, kernel test robot wrote:
> > Hi Andrew,
> >
> > Thank you for the patch! Perhaps something to improve:
> >
> > [auto build test WARNING on mst-vhost/linux-next]
> > [also build test WARNING on net/master horms-ipvs/master net-next/master linus/master v5.17-rc5 next-20220217]
> > [If your patch is applied to the wrong git tree, kindly drop us a note.
> > And when submitting patch, we suggest to use '--base' as documented in
> > https://git-scm.com/docs/git-format-patch]
>
>
> Andrew,
> do you plan to fix this?
>
> > url:    https://github.com/0day-ci/linux/commits/Andrew-Melnychenko/RSS-support-for-VirtioNet/20220222-200334
> > base:   https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git linux-next
> > config: i386-randconfig-s002-20220221 (https://download.01.org/0day-ci/archive/20220223/202202230342.HPYe6dHA-lkp@intel.com/config)
> > compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
> > reproduce:
> >         # apt-get install sparse
> >         # sparse version: v0.6.4-dirty
> >         # https://github.com/0day-ci/linux/commit/4fda71c17afd24d8afb675baa0bb14dbbc6cd23c
> >         git remote add linux-review https://github.com/0day-ci/linux
> >         git fetch --no-tags linux-review Andrew-Melnychenko/RSS-support-for-VirtioNet/20220222-200334
> >         git checkout 4fda71c17afd24d8afb675baa0bb14dbbc6cd23c
> >         # save the config file to linux build tree
> >         mkdir build_dir
> >         make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=i386 SHELL=/bin/bash
> >
> > If you fix the issue, kindly add following tag as appropriate
> > Reported-by: kernel test robot <lkp@...el.com>
> >
> >
> > sparse warnings: (new ones prefixed by >>)
> >    drivers/net/virtio_net.c:1160:25: sparse: sparse: restricted __le16 degrades to integer
> >    drivers/net/virtio_net.c:1160:25: sparse: sparse: restricted __le16 degrades to integer
> >    drivers/net/virtio_net.c:1160:25: sparse: sparse: restricted __le16 degrades to integer
> >    drivers/net/virtio_net.c:1160:25: sparse: sparse: restricted __le16 degrades to integer
> >    drivers/net/virtio_net.c:1160:25: sparse: sparse: restricted __le16 degrades to integer
> >    drivers/net/virtio_net.c:1160:25: sparse: sparse: restricted __le16 degrades to integer
> >    drivers/net/virtio_net.c:1160:25: sparse: sparse: restricted __le16 degrades to integer
> >    drivers/net/virtio_net.c:1160:25: sparse: sparse: restricted __le16 degrades to integer
> >    drivers/net/virtio_net.c:1160:25: sparse: sparse: restricted __le16 degrades to integer
> > >> drivers/net/virtio_net.c:1178:35: sparse: sparse: incorrect type in argument 2 (different base types) @@     expected unsigned int [usertype] hash @@     got restricted __le32 const [usertype] hash_value @@
> >    drivers/net/virtio_net.c:1178:35: sparse:     expected unsigned int [usertype] hash
> >    drivers/net/virtio_net.c:1178:35: sparse:     got restricted __le32 const [usertype] hash_value
> >
> > vim +1178 drivers/net/virtio_net.c
> >
> >   1151
> >   1152        static void virtio_skb_set_hash(const struct virtio_net_hdr_v1_hash *hdr_hash,
> >   1153                                        struct sk_buff *skb)
> >   1154        {
> >   1155                enum pkt_hash_types rss_hash_type;
> >   1156
> >   1157                if (!hdr_hash || !skb)
> >   1158                        return;
> >   1159
> >   1160                switch (hdr_hash->hash_report) {
> >   1161                case VIRTIO_NET_HASH_REPORT_TCPv4:
> >   1162                case VIRTIO_NET_HASH_REPORT_UDPv4:
> >   1163                case VIRTIO_NET_HASH_REPORT_TCPv6:
> >   1164                case VIRTIO_NET_HASH_REPORT_UDPv6:
> >   1165                case VIRTIO_NET_HASH_REPORT_TCPv6_EX:
> >   1166                case VIRTIO_NET_HASH_REPORT_UDPv6_EX:
> >   1167                        rss_hash_type = PKT_HASH_TYPE_L4;
> >   1168                        break;
> >   1169                case VIRTIO_NET_HASH_REPORT_IPv4:
> >   1170                case VIRTIO_NET_HASH_REPORT_IPv6:
> >   1171                case VIRTIO_NET_HASH_REPORT_IPv6_EX:
> >   1172                        rss_hash_type = PKT_HASH_TYPE_L3;
> >   1173                        break;
> >   1174                case VIRTIO_NET_HASH_REPORT_NONE:
> >   1175                default:
> >   1176                        rss_hash_type = PKT_HASH_TYPE_NONE;
> >   1177                }
> > > 1178                skb_set_hash(skb, hdr_hash->hash_value, rss_hash_type);
> >   1179        }
> >   1180
> >
> > ---
> > 0-DAY CI Kernel Test Service, Intel Corporation
> > https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
>