Thread (33 messages) 33 messages, 6 authors, 2025-10-24

Re: [PATCH net-next v2 04/14] ice: add virtchnl and VF context support for GTP RSS

From: Jakub Kicinski <kuba@kernel.org>
Date: 2025-10-21 01:22:37
Also in: linux-doc, lkml

On Thu, 16 Oct 2025 23:08:33 -0700 Jacob Keller wrote:
 void ice_parser_destroy(struct ice_parser *psr)
 {
+	if (!psr)
+		return;
questionable
+	{VIRTCHNL_PROTO_HDR_L2TPV2,
+		FIELD_SELECTOR(VIRTCHNL_PROTO_HDR_L2TPV2_SESS_ID),
+		BIT_ULL(ICE_FLOW_FIELD_IDX_L2TPV2_SESS_ID)},
+	{VIRTCHNL_PROTO_HDR_L2TPV2,
+		FIELD_SELECTOR(VIRTCHNL_PROTO_HDR_L2TPV2_LEN_SESS_ID),
+		BIT_ULL(ICE_FLOW_FIELD_IDX_L2TPV2_LEN_SESS_ID)},
consider moving out all the static data and define changes to a
separate commit for ease of review?
 };
 
+static enum virtchnl_status_code
+ice_vc_rss_hash_update(struct ice_hw *hw, struct ice_vsi *vsi, u8 hash_type)
+{
+	enum virtchnl_status_code v_ret = VIRTCHNL_STATUS_SUCCESS;
+	struct ice_vsi_ctx *ctx;
+	int ret;
+
+	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
+	if (!ctx)
+		return VIRTCHNL_STATUS_ERR_NO_MEMORY;
I feel like the VIRTCHNL_* error codes are spreading, we've been over
this. 
+static int
+ice_hash_remove(struct ice_vf *vf, struct ice_rss_hash_cfg *cfg)
+{
+	int ret;
+
+	ret = ice_hash_moveout(vf, cfg);
+	if (ret && (ret != -ENOENT))
spurious brackets
+/**
+ * ice_add_rss_cfg_pre_ip - Pre-process IP-layer RSS configuration
+ * @vf: VF pointer
+ * @ctx: IP L4 hash context (ESP/UDP-ESP/AH/PFCP and UDP/TCP/SCTP)
+ *
+ * Remove covered/recorded IP RSS configurations prior to adding a new one.
+ *
+ * Return: 0 on success; negative error code on failure.
+ */
+static int
+ice_add_rss_cfg_pre_ip(struct ice_vf *vf, struct ice_vf_hash_ip_ctx *ctx)
+{
+	int i, ret;
+
+	for (i = 1; i < ICE_HASH_IP_CTX_MAX; i++)
+		if (ice_is_hash_cfg_valid(&ctx->ctx[i])) {
+			ret = ice_hash_remove(vf, &ctx->ctx[i]);
+
spurious new line
+			if (ret)
+				return ret;
+		}
+
+	return 0;
+}
+static int
+ice_parse_raw_rss_pattern(struct ice_vf *vf, struct virtchnl_proto_hdrs *proto,
+			  struct ice_rss_raw_cfg *raw_cfg)
+{
+	struct ice_parser_result pkt_parsed;
+	struct ice_hw *hw = &vf->pf->hw;
+	struct ice_parser_profile prof;
+	u16 pkt_len;
+	struct ice_parser *psr;
+	u8 *pkt_buf, *msk_buf;
+	int ret = 0;
+
+	pkt_len = proto->raw.pkt_len;
+	if (!pkt_len)
+		return -EINVAL;
+	if (pkt_len > VIRTCHNL_MAX_SIZE_RAW_PACKET)
+		pkt_len = VIRTCHNL_MAX_SIZE_RAW_PACKET;
+
+	pkt_buf = kzalloc(pkt_len, GFP_KERNEL);
+	msk_buf = kzalloc(pkt_len, GFP_KERNEL);
+	if (!pkt_buf || !msk_buf) {
+		ret = -ENOMEM;
+		goto free_alloc;
+	}
+
+	memcpy(pkt_buf, proto->raw.spec, pkt_len);
+	memcpy(msk_buf, proto->raw.mask, pkt_len);
+
+	psr = ice_parser_create(hw);
+	if (IS_ERR(psr)) {
+		ret = PTR_ERR(psr);
+		goto parser_destroy;
goto free_alloc, surely, parser creation has failed, there's nothing to destroy
+	}
+
+	ret = ice_parser_run(psr, pkt_buf, pkt_len, &pkt_parsed);
+	if (ret)
+		goto parser_destroy;
+
+	ret = ice_parser_profile_init(&pkt_parsed, pkt_buf, msk_buf,
+				      pkt_len, ICE_BLK_RSS, &prof);
+	if (ret)
+		goto parser_destroy;
+
+	memcpy(&raw_cfg->prof, &prof, sizeof(prof));
+
+parser_destroy:
+	ice_parser_destroy(psr);
+free_alloc:
+	kfree(pkt_buf);
+	kfree(msk_buf);
+	return ret;
+}
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