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[80.230.39.63]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-477bf355933sm262722995e9.2.2025.11.25.06.25.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 25 Nov 2025 06:25:35 -0800 (PST) Date: Tue, 25 Nov 2025 09:25:32 -0500 From: "Michael S. Tsirkin" To: Daniel Jurgens Cc: netdev@vger.kernel.org, jasowang@redhat.com, pabeni@redhat.com, virtualization@lists.linux.dev, parav@nvidia.com, shshitrit@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 Subject: Re: [PATCH net-next v12 07/12] virtio_net: Implement layer 2 ethtool flow rules Message-ID: <20251125092418-mutt-send-email-mst@kernel.org> References: <20251119191524.4572-1-danielj@nvidia.com> <20251119191524.4572-8-danielj@nvidia.com> Precedence: bulk X-Mailing-List: virtualization@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 In-Reply-To: <20251119191524.4572-8-danielj@nvidia.com> X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: 5b4j-yXX0rgThzfbKFL9TVUppOal6LIcsy3o5jAuaAo_1764080737 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Wed, Nov 19, 2025 at 01:15:18PM -0600, Daniel Jurgens wrote: > +static int virtnet_ethtool_flow_insert(struct virtnet_ff *ff, > + struct ethtool_rx_flow_spec *fs, > + u16 curr_queue_pairs) > +{ > + struct virtnet_ethtool_rule *eth_rule; > + int err; > + > + if (!ff->ff_supported) > + return -EOPNOTSUPP; > + > + err = validate_flow_input(ff, fs, curr_queue_pairs); > + if (err) > + return err; > + > + eth_rule = kzalloc(sizeof(*eth_rule), GFP_KERNEL); > + if (!eth_rule) > + return -ENOMEM; > + > + err = xa_alloc(&ff->ethtool.rules, &fs->location, eth_rule, > + XA_LIMIT(0, le32_to_cpu(ff->ff_caps->rules_limit) - 1), > + GFP_KERNEL); > + if (err) > + goto err_rule; > + > + eth_rule->flow_spec = *fs; > + > + err = build_and_insert(ff, eth_rule); > + if (err) > + goto err_xa; btw kind of inelegant that we change fs->location if build_and_insert fails. restore it? > + return err; > + > +err_xa: > + xa_erase(&ff->ethtool.rules, eth_rule->flow_spec.location); > + > +err_rule: > + fs->location = RX_CLS_LOC_ANY; > + kfree(eth_rule); > + > + return err; > +}