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Tsirkin" , Zhu Lingshan , Stefano Garzarella , Xie Yongji , Eli Cohen , Si-Wei Liu , Parav Pandit , Longpeng , , , , Subject: [RFC PATCH v2 18/19] vdpa_sim: filter destination mac address Date: Fri, 25 Feb 2022 02:52:58 +0530 Message-ID: <20220224212314.1326-19-gdawar@xilinx.com> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20220224212314.1326-1-gdawar@xilinx.com> References: <20201216064818.48239-1-jasowang@redhat.com> <20220224212314.1326-1-gdawar@xilinx.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 95ebf148-603b-430c-0b77-08d9f7dcb6f3 X-MS-TrafficTypeDiagnostic: MWHPR02MB2864:EE_ X-Microsoft-Antispam-PRVS: X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:149.199.62.198;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:xsj-pvapexch01.xlnx.xilinx.com;PTR:unknown-62-198.xilinx.com;CAT:NONE;SFS:(13230001)(4636009)(40470700004)(46966006)(36840700001)(356005)(6666004)(7636003)(44832011)(7696005)(9786002)(2906002)(186003)(40460700003)(26005)(8936002)(109986005)(54906003)(47076005)(336012)(8676002)(83380400001)(82310400004)(2616005)(508600001)(70586007)(70206006)(4326008)(316002)(1076003)(7416002)(36860700001)(36756003)(5660300002)(426003)(102446001)(266003);DIR:OUT;SFP:1101; X-OriginatorOrg: xilinx.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 24 Feb 2022 21:29:18.3101 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 95ebf148-603b-430c-0b77-08d9f7dcb6f3 X-MS-Exchange-CrossTenant-Id: 657af505-d5df-48d0-8300-c31994686c5c X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=657af505-d5df-48d0-8300-c31994686c5c;Ip=[149.199.62.198];Helo=[xsj-pvapexch01.xlnx.xilinx.com] X-MS-Exchange-CrossTenant-AuthSource: DM3NAM02FT028.eop-nam02.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MWHPR02MB2864 To: unlisted-recipients:; (no To-header on input) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch implements a simple unicast filter for vDPA simulator. Signed-off-by: Jason Wang Signed-off-by: Gautam Dawar --- drivers/vdpa/vdpa_sim/vdpa_sim_net.c | 49 ++++++++++++++++++---------- 1 file changed, 31 insertions(+), 18 deletions(-) diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim_net.c b/drivers/vdpa/vdpa_sim/vdpa_sim_net.c index 05d552cb7f94..ed5ade4ae570 100644 --- a/drivers/vdpa/vdpa_sim/vdpa_sim_net.c +++ b/drivers/vdpa/vdpa_sim/vdpa_sim_net.c @@ -47,13 +47,28 @@ static void vdpasim_net_complete(struct vdpasim_virtqueue *vq, size_t len) local_bh_enable(); } +static bool receive_filter(struct vdpasim *vdpasim, size_t len) +{ + bool modern = vdpasim->features & (1ULL << VIRTIO_F_VERSION_1); + size_t hdr_len = modern ? sizeof(struct virtio_net_hdr_v1) : + sizeof(struct virtio_net_hdr); + + if (len < ETH_ALEN + hdr_len) + return false; + + if (!strncmp(vdpasim->buffer + hdr_len, + vdpasim->config.mac, ETH_ALEN)) + return true; + + return false; +} + static void vdpasim_net_work(struct work_struct *work) { struct vdpasim *vdpasim = container_of(work, struct vdpasim, work); struct vdpasim_virtqueue *txq = &vdpasim->vqs[1]; struct vdpasim_virtqueue *rxq = &vdpasim->vqs[0]; ssize_t read, write; - size_t total_write; int pkts = 0; int err; @@ -66,36 +81,34 @@ static void vdpasim_net_work(struct work_struct *work) goto out; while (true) { - total_write = 0; err = vringh_getdesc_iotlb(&txq->vring, &txq->out_iov, NULL, &txq->head, GFP_ATOMIC); if (err <= 0) break; + read = vringh_iov_pull_iotlb(&txq->vring, &txq->out_iov, + vdpasim->buffer, + PAGE_SIZE); + + if (!receive_filter(vdpasim, read)) { + vdpasim_complete(txq, 0); + continue; + } + err = vringh_getdesc_iotlb(&rxq->vring, NULL, &rxq->in_iov, &rxq->head, GFP_ATOMIC); if (err <= 0) { - vringh_complete_iotlb(&txq->vring, txq->head, 0); + vdpasim_net_complete(txq, 0); break; } - while (true) { - read = vringh_iov_pull_iotlb(&txq->vring, &txq->out_iov, - vdpasim->buffer, - PAGE_SIZE); - if (read <= 0) - break; - - write = vringh_iov_push_iotlb(&rxq->vring, &rxq->in_iov, - vdpasim->buffer, read); - if (write <= 0) - break; - - total_write += write; - } + write = vringh_iov_push_iotlb(&rxq->vring, &rxq->in_iov, + vdpasim->buffer, read); + if (write <= 0) + break; vdpasim_net_complete(txq, 0); - vdpasim_net_complete(rxq, total_write); + vdpasim_net_complete(rxq, write); if (++pkts > 4) { schedule_work(&vdpasim->work); -- 2.25.0