diff --git a/Documentation/netlink/specs/ethtool.yaml b/Documentation/netlink/specs/ethtool.yaml index cf69eedae51d27d2776650e32097439133bdc4d0..4c2334c213b00a55d7f88a0eceaddcee39e8550c 100644 --- a/Documentation/netlink/specs/ethtool.yaml +++ b/Documentation/netlink/specs/ethtool.yaml @@ -1028,6 +1028,9 @@ attribute-sets: - name: input_xfrm type: u32 + - + name: start-context + type: u32 - name: plca attributes: @@ -1766,6 +1769,7 @@ operations: request: attributes: - header + - start-context reply: *rss-reply - name: plca-get-cfg diff --git a/Documentation/networking/ethtool-netlink.rst b/Documentation/networking/ethtool-netlink.rst index d5f246aceb9f481a5ad0db84937aada30e1e81dd..82c5542c80ce3a7389fac280442da0a81cb0fc0d 100644 --- a/Documentation/networking/ethtool-netlink.rst +++ b/Documentation/networking/ethtool-netlink.rst @@ -1866,10 +1866,18 @@ RSS context of an interface similar to ``ETHTOOL_GRSSH`` ioctl request. Request contents: -===================================== ====== ========================== +===================================== ====== ============================ ``ETHTOOL_A_RSS_HEADER`` nested request header ``ETHTOOL_A_RSS_CONTEXT`` u32 context number -===================================== ====== ========================== + ``ETHTOOL_A_RSS_START_CONTEXT`` u32 start context number (dumps) +===================================== ====== ============================ + +``ETHTOOL_A_RSS_CONTEXT`` specifies which RSS context number to query, +if not set context 0 (the main context) is queried. Dumps can be filtered +by device (only listing contexts of a given netdev). Filtering single +context number is not supported but ``ETHTOOL_A_RSS_START_CONTEXT`` +can be used to start dumping context from the given number (primarily +used to ignore context 0s and only dump additional contexts). Kernel response contents: diff --git a/include/uapi/linux/ethtool_netlink.h b/include/uapi/linux/ethtool_netlink.h index 6d5bdcc67631a948a53ac1a29d44903b7e100fad..93c57525a975305cb8a7bb81e3d2031bb0dd6c56 100644 --- a/include/uapi/linux/ethtool_netlink.h +++ b/include/uapi/linux/ethtool_netlink.h @@ -965,6 +965,7 @@ enum { ETHTOOL_A_RSS_INDIR, /* binary */ ETHTOOL_A_RSS_HKEY, /* binary */ ETHTOOL_A_RSS_INPUT_XFRM, /* u32 */ + ETHTOOL_A_RSS_START_CONTEXT, /* u32 */ __ETHTOOL_A_RSS_CNT, ETHTOOL_A_RSS_MAX = (__ETHTOOL_A_RSS_CNT - 1), diff --git a/net/ethtool/netlink.h b/net/ethtool/netlink.h index 919371383b235fdc27b2aea1651579d46f69cf3a..236c189fc9688954398955ff565901552100c9ed 100644 --- a/net/ethtool/netlink.h +++ b/net/ethtool/netlink.h @@ -449,7 +449,7 @@ extern const struct nla_policy ethnl_module_get_policy[ETHTOOL_A_MODULE_HEADER + extern const struct nla_policy ethnl_module_set_policy[ETHTOOL_A_MODULE_POWER_MODE_POLICY + 1]; extern const struct nla_policy ethnl_pse_get_policy[ETHTOOL_A_PSE_HEADER + 1]; extern const struct nla_policy ethnl_pse_set_policy[ETHTOOL_A_PSE_MAX + 1]; -extern const struct nla_policy ethnl_rss_get_policy[ETHTOOL_A_RSS_CONTEXT + 1]; +extern const struct nla_policy ethnl_rss_get_policy[ETHTOOL_A_RSS_START_CONTEXT + 1]; extern const struct nla_policy ethnl_plca_get_cfg_policy[ETHTOOL_A_PLCA_HEADER + 1]; extern const struct nla_policy ethnl_plca_set_cfg_policy[ETHTOOL_A_PLCA_MAX + 1]; extern const struct nla_policy ethnl_plca_get_status_policy[ETHTOOL_A_PLCA_HEADER + 1]; diff --git a/net/ethtool/rss.c b/net/ethtool/rss.c index 2865720ff583dfa9ff202faa8383cf5eaa58b44c..e07386275e142dff35af40f2b45bee5e41968ada 100644 --- a/net/ethtool/rss.c +++ b/net/ethtool/rss.c @@ -28,6 +28,7 @@ struct rss_reply_data { const struct nla_policy ethnl_rss_get_policy[] = { [ETHTOOL_A_RSS_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy), [ETHTOOL_A_RSS_CONTEXT] = { .type = NLA_U32 }, + [ETHTOOL_A_RSS_START_CONTEXT] = { .type = NLA_U32 }, }; static int @@ -38,6 +39,10 @@ rss_parse_request(struct ethnl_req_info *req_info, struct nlattr **tb, if (tb[ETHTOOL_A_RSS_CONTEXT]) request->rss_context = nla_get_u32(tb[ETHTOOL_A_RSS_CONTEXT]); + if (tb[ETHTOOL_A_RSS_START_CONTEXT]) { + NL_SET_BAD_ATTR(extack, tb[ETHTOOL_A_RSS_START_CONTEXT]); + return -EINVAL; + } return 0; } @@ -214,6 +219,7 @@ struct rss_nl_dump_ctx { /* User wants to only dump contexts from given ifindex */ unsigned int match_ifindex; + unsigned int start_ctx; }; static struct rss_nl_dump_ctx *rss_dump_ctx(struct netlink_callback *cb) @@ -236,6 +242,10 @@ int ethnl_rss_dump_start(struct netlink_callback *cb) NL_SET_BAD_ATTR(info->extack, tb[ETHTOOL_A_RSS_CONTEXT]); return -EINVAL; } + if (tb[ETHTOOL_A_RSS_START_CONTEXT]) { + ctx->start_ctx = nla_get_u32(tb[ETHTOOL_A_RSS_START_CONTEXT]); + ctx->ctx_idx = ctx->start_ctx; + } ret = ethnl_parse_header_dev_get(&req_info, tb[ETHTOOL_A_RSS_HEADER], @@ -317,7 +327,7 @@ rss_dump_one_dev(struct sk_buff *skb, struct netlink_callback *cb, if (ret) return ret; } - ctx->ctx_idx = 0; + ctx->ctx_idx = ctx->start_ctx; return 0; }