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Message-ID: <ZqzcnuLphqIROwQ7@LQ3V64L9R2>
Date: Fri, 2 Aug 2024 14:18:22 +0100
From: Joe Damato <jdamato@...tly.com>
To: Jakub Kicinski <kuba@...nel.org>
Cc: davem@...emloft.net, netdev@...r.kernel.org, edumazet@...gle.com,
pabeni@...hat.com, dxu@...uu.xyz, ecree.xilinx@...il.com,
przemyslaw.kitszel@...el.com, donald.hunter@...il.com,
gal.pressman@...ux.dev, tariqt@...dia.com,
willemdebruijn.kernel@...il.com
Subject: Re: [PATCH net-next 08/12] ethtool: rss: report info about
additional contexts from XArray
On Thu, Aug 01, 2024 at 05:17:57PM -0700, Jakub Kicinski wrote:
> IOCTL already uses the XArray when reporting info about additional
> contexts. Do the same thing in netlink code.
>
> Signed-off-by: Jakub Kicinski <kuba@...nel.org>
> ---
> net/ethtool/rss.c | 37 ++++++++++++++++++++++++++++++++++++-
> 1 file changed, 36 insertions(+), 1 deletion(-)
>
> diff --git a/net/ethtool/rss.c b/net/ethtool/rss.c
> index 5c477cc36251..023782ca1230 100644
> --- a/net/ethtool/rss.c
> +++ b/net/ethtool/rss.c
> @@ -82,7 +82,6 @@ rss_prepare_get(const struct rss_req_info *request, struct net_device *dev,
> rxfh.indir = data->indir_table;
> rxfh.key_size = data->hkey_size;
> rxfh.key = data->hkey;
> - rxfh.rss_context = request->rss_context;
>
> ret = ops->get_rxfh(dev, &rxfh);
> if (ret)
> @@ -95,6 +94,41 @@ rss_prepare_get(const struct rss_req_info *request, struct net_device *dev,
> return ret;
> }
>
> +static int
> +rss_prepare_ctx(const struct rss_req_info *request, struct net_device *dev,
> + struct rss_reply_data *data, const struct genl_info *info)
> +{
> + struct ethtool_rxfh_context *ctx;
> + u32 total_size, indir_bytes;
> + u8 *rss_config;
> +
> + ctx = xa_load(&dev->ethtool->rss_ctx, request->rss_context);
> + if (!ctx)
> + return -ENOENT;
> +
> + data->indir_size = ctx->indir_size;
> + data->hkey_size = ctx->key_size;
> + data->hfunc = ctx->hfunc;
> + data->input_xfrm = ctx->input_xfrm;
> +
> + indir_bytes = data->indir_size * sizeof(u32);
> + total_size = indir_bytes + data->hkey_size;
> + rss_config = kzalloc(total_size, GFP_KERNEL);
> + if (!rss_config)
> + return -ENOMEM;
> +
> + data->indir_table = (u32 *)rss_config;
> + memcpy(data->indir_table, ethtool_rxfh_context_indir(ctx), indir_bytes);
> +
> + if (data->hkey_size) {
> + data->hkey = rss_config + indir_bytes;
> + memcpy(data->hkey, ethtool_rxfh_context_key(ctx),
> + data->hkey_size);
> + }
> +
> + return 0;
> +}
> +
> static int
> rss_prepare_data(const struct ethnl_req_info *req_base,
> struct ethnl_reply_data *reply_base,
> @@ -115,6 +149,7 @@ rss_prepare_data(const struct ethnl_req_info *req_base,
> return -EOPNOTSUPP;
>
> data->no_key_fields = !ops->rxfh_per_ctx_key;
> + return rss_prepare_ctx(request, dev, data, info);
> }
>
> return rss_prepare_get(request, dev, data, info);
> --
> 2.45.2
>
>
Reviewed-by: Joe Damato <jdamato@...tly.com>
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