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Tsirkin" Cc: netdev@vger.kernel.org, jasowang@redhat.com, pabeni@redhat.com, virtualization@lists.linux.dev, parav@nvidia.com, yohadt@nvidia.com, xuanzhuo@linux.alibaba.com, eperezma@redhat.com, jgg@ziepe.ca, kevin.tian@intel.com, kuba@kernel.org, andrew+netdev@lunn.ch, edumazet@google.com, danielj@nvidia.com References: <20260803140721.1871678-1-shshitrit@nvidia.com> <20260803140721.1871678-7-shshitrit@nvidia.com> <20260803122249-mutt-send-email-mst@kernel.org> Content-Language: en-US From: Shahar Shitrit In-Reply-To: <20260803122249-mutt-send-email-mst@kernel.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-ClientProxiedBy: FR4P281CA0030.DEUP281.PROD.OUTLOOK.COM (2603:10a6:d10:c9::7) To BL0PR12MB5505.namprd12.prod.outlook.com (2603:10b6:208:1ce::7) Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BL0PR12MB5505:EE_|SA1PR12MB6919:EE_ X-MS-Office365-Filtering-Correlation-Id: 99074ca3-f04e-4b0c-3f3b-08def7b9b044 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|376014|7416014|23010399003|1800799024|18002099003|22082099003|11063799006|4143699003|10067099003|56012099006|6133799003; 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Tsirkin wrote: > On Mon, Aug 03, 2026 at 05:07:14PM +0300, Shahar Shitrit wrote: >> From: Daniel Jurgens >> >> All ethtool steering rules will go in one group, create it during >> initialization. >> >> Signed-off-by: Daniel Jurgens >> Reviewed-by: Parav Pandit >> Reviewed-by: Xuan Zhuo >> Signed-off-by: Shahar Shitrit >> --- >> drivers/net/virtio_net.c | 29 +++++++++++++++++++++++++++++ >> include/uapi/linux/virtio_net_ff.h | 15 +++++++++++++++ >> 2 files changed, 44 insertions(+) >> >> diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c >> index 0d1f5a6cfd12..e11e42583243 100644 >> --- a/drivers/net/virtio_net.c >> +++ b/drivers/net/virtio_net.c >> @@ -287,6 +287,9 @@ static const struct virtnet_stat_desc virtnet_stats_tx_speed_desc_qstat[] = { >> VIRTNET_STATS_DESC_TX_QSTAT(speed, ratelimit_packets, hw_drop_ratelimits), >> }; >> >> +#define VIRTNET_FF_ETHTOOL_GROUP_PRIORITY 1 > > why 1 and not 0? We left 0 open for ARFS. We want ethtool rules to have higher priority. But since VIRTNET_FF_ETHTOOL_GROUP_PRIORITY is not part of the UAPI header file, I will change it to 0 now and later when ARFS is implemented, it could be changed to 1. > >> +#define VIRTNET_FF_MAX_GROUPS 1 >> + >> struct virtnet_ff { >> struct virtio_device *vdev; >> bool ff_supported; >> @@ -5749,6 +5752,7 @@ static int virtnet_ff_init(struct virtnet_ff *ff, struct virtio_device *vdev) >> size_t ff_mask_size = sizeof(struct virtio_net_ff_cap_mask_data) + >> sizeof(struct virtio_net_ff_selector) * >> VIRTIO_NET_FF_MASK_TYPE_MAX; >> + struct virtio_net_resource_obj_ff_group ethtool_group = {}; >> struct virtio_admin_cmd_query_cap_id_result *cap_id_list; >> struct virtio_net_ff_selector *sel; >> unsigned long sel_types = 0; >> @@ -5839,6 +5843,12 @@ static int virtnet_ff_init(struct virtnet_ff *ff, struct virtio_device *vdev) >> ff->ff_actions->count = min_t(u8, ff->ff_actions->count, >> VIRTIO_NET_FF_ACTION_MAX); >> >> + if (le32_to_cpu(ff->ff_caps->groups_limit) < VIRTNET_FF_MAX_GROUPS) { >> + err = -ENOSPC; >> + goto err_ff_action; >> + } >> + ff->ff_caps->groups_limit = cpu_to_le32(VIRTNET_FF_MAX_GROUPS); >> + >> err = virtio_admin_cap_set(vdev, >> VIRTIO_NET_FF_RESOURCE_CAP, >> ff->ff_caps, >> @@ -5886,6 +5896,19 @@ static int virtnet_ff_init(struct virtnet_ff *ff, struct virtio_device *vdev) >> if (err) >> goto err_ff_action; >> >> + ethtool_group.group_priority = cpu_to_le16(VIRTNET_FF_ETHTOOL_GROUP_PRIORITY); >> + >> + /* Use priority for the object ID. */ > > and how is this ok? > spec says: > Each resource object has a unique resource object ID - a driver-assigned number > in the range of 0 to \field{limit - 1}, where the \field{limit} is the maximum > number set by the driver for this resource object type. > > and limit here is 1, right? right. it is fixed by changing VIRTNET_FF_ETHTOOL_GROUP_PRIORITY to 0. > >> + err = virtio_admin_obj_create(vdev, >> + VIRTIO_NET_RESOURCE_OBJ_FF_GROUP, >> + VIRTNET_FF_ETHTOOL_GROUP_PRIORITY, >> + VIRTIO_ADMIN_GROUP_TYPE_SELF, >> + 0, >> + ðtool_group, >> + sizeof(ethtool_group)); >> + if (err) >> + goto err_ff_action; >> + >> ff->vdev = vdev; >> ff->ff_supported = true; >> >> @@ -5913,6 +5936,12 @@ static void virtnet_ff_cleanup(struct virtnet_ff *ff) >> if (!ff->ff_supported) >> return; >> >> + virtio_admin_obj_destroy(ff->vdev, >> + VIRTIO_NET_RESOURCE_OBJ_FF_GROUP, >> + VIRTNET_FF_ETHTOOL_GROUP_PRIORITY, >> + VIRTIO_ADMIN_GROUP_TYPE_SELF, >> + 0); >> + >> kfree(ff->ff_actions); >> kfree(ff->ff_mask); >> kfree(ff->ff_caps); >> diff --git a/include/uapi/linux/virtio_net_ff.h b/include/uapi/linux/virtio_net_ff.h >> index f9e771a0baff..b0780e49df9f 100644 >> --- a/include/uapi/linux/virtio_net_ff.h >> +++ b/include/uapi/linux/virtio_net_ff.h >> @@ -12,6 +12,8 @@ >> #define VIRTIO_NET_FF_SELECTOR_CAP 0x801 >> #define VIRTIO_NET_FF_ACTION_CAP 0x802 >> >> +#define VIRTIO_NET_RESOURCE_OBJ_FF_GROUP 0x0200 >> + >> /** >> * struct virtio_net_ff_cap_data - Flow filter resource capability limits >> * @groups_limit: maximum number of flow filter groups supported by the device >> @@ -88,4 +90,17 @@ struct virtio_net_ff_actions { >> __u8 reserved[7]; >> __u8 actions[] __counted_by(count); >> }; >> + >> +/** >> + * struct virtio_net_resource_obj_ff_group - Flow filter group object >> + * @group_priority: priority of the group used to order evaluation >> + * >> + * This structure is the payload for the VIRTIO_NET_RESOURCE_OBJ_FF_GROUP >> + * administrative object. Devices use @group_priority to order flow filter >> + * groups. Multi-byte fields are little-endian. >> + */ >> +struct virtio_net_resource_obj_ff_group { >> + __le16 group_priority; >> +}; >> + >> #endif >> -- >> 2.49.0 >