+ if (err)
+ return err;
+
+ if (nla_len(tb[ETHTOOL_A_RSS_INDIR]) % 4) {
+ NL_SET_BAD_ATTR(info->extack, tb[ETHTOOL_A_RSS_INDIR]);
+ return -EINVAL;
+ }
+ user_size = nla_len(tb[ETHTOOL_A_RSS_INDIR]) / 4;
+ if (!user_size) {
+ if (rxfh->rss_context) {
+ NL_SET_ERR_MSG_ATTR(extack, tb[ETHTOOL_A_RSS_INDIR],
+ "can't reset table for a context");
+ return -EINVAL;
+ }
+ *reset = true;
+ } else if (data->indir_size % user_size) {
+ NL_SET_ERR_MSG_ATTR_FMT(extack, tb[ETHTOOL_A_RSS_INDIR],
+ "size (%d) mismatch with device indir table (%d)",
+ user_size, data->indir_size);
+ return -EINVAL;
+ }
+
+ rxfh->indir_size = data->indir_size;
+ alloc_size = array_size(data->indir_size, sizeof(rxfh->indir[0]));
+ rxfh->indir = kzalloc(alloc_size, GFP_KERNEL);
+ if (!rxfh->indir)
+ return -ENOMEM;
+
+ nla_memcpy(rxfh->indir, tb[ETHTOOL_A_RSS_INDIR], alloc_size);
+ for (i = 0; i < user_size; i++) {
+ if (rxfh->indir[i] < rx_rings.data)
+ continue;
+
+ NL_SET_ERR_MSG_ATTR_FMT(extack, tb[ETHTOOL_A_RSS_INDIR],
+ "entry %d: queue out of range (%d)",
+ i, rxfh->indir[i]);
+ err = -EINVAL;
+ goto err_free;
+ }
+
+ if (user_size) {
+ /* Replicate the user-provided table to fill the device table */
+ for (i = user_size; i < data->indir_size; i++)
+ rxfh->indir[i] = rxfh->indir[i % user_size];
+ } else {
+ for (i = 0; i < data->indir_size; i++)
+ rxfh->indir[i] =
+ ethtool_rxfh_indir_default(i, rx_rings.data);
+ }
+
+ *mod |= memcmp(rxfh->indir, data->indir_table, data->indir_size);
+
+ return 0;
+
+err_free:
+ kfree(rxfh->indir);
+ rxfh->indir = NULL;
+ return err;
+}
+
+static int
+ethnl_rss_set(struct ethnl_req_info *req_info, struct genl_info *info)
+{
+ struct rss_req_info *request = RSS_REQINFO(req_info);
+ struct ethtool_rxfh_context *ctx = NULL;
+ struct net_device *dev = req_info->dev;
+ struct ethtool_rxfh_param rxfh = {};
+ bool indir_reset = false, indir_mod;
+ struct nlattr **tb = info->attrs;
+ struct rss_reply_data data = {};
+ const struct ethtool_ops *ops;
+ bool mod = false;
+ int ret;
+
+ ops = dev->ethtool_ops;
+ data.base.dev = dev;
+
+ ret = rss_prepare(request, dev, &data, info);
+ if (ret)
+ return ret;
+
+ rxfh.rss_context = request->rss_context;
+
+ ret = rss_set_prep_indir(dev, info, &data, &rxfh, &indir_reset, &mod);
+ if (ret)
+ goto exit_clean_data;
+ indir_mod = !!tb[ETHTOOL_A_RSS_INDIR];
+
+ rxfh.hfunc = ETH_RSS_HASH_NO_CHANGE;
+ rxfh.input_xfrm = RXH_XFRM_NO_CHANGE;
+
+ mutex_lock(&dev->ethtool->rss_lock);
+ if (request->rss_context) {
+ ctx = xa_load(&dev->ethtool->rss_ctx, request->rss_context);
+ if (!ctx) {
+ ret = -ENOENT;
+ goto exit_unlock;
+ }
+ }
+
+ if (!mod)
+ ret = 0; /* nothing to tell the driver */
+ else if (!ops->set_rxfh)