From patchwork Wed Sep 27 07:51:17 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Larysa Zaremba X-Patchwork-Id: 13400305 X-Patchwork-Delegate: bpf@iogearbox.net Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7EC6F1D52F; Wed, 27 Sep 2023 07:58:30 +0000 (UTC) Received: from mgamail.intel.com (mgamail.intel.com [134.134.136.126]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 07706180; Wed, 27 Sep 2023 00:58:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1695801509; x=1727337509; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=gLxjLJK4DdORpfphhxi4RC03eCgA1fz5AQN7piy1e6Y=; b=VFab6UOSH/rn5wYUFknFL7Wq6aIdh9reA+J33hvhrpPW6VYJamQNpFtA m+VpgKfhejxgszucU20qUC70ovqwKQmHu+URFfRtSZDmUnNMIAO2CZzB2 4zN45WUZDyTyl9vL3LlSKlH/OqcU22zpYkZGifHyl0haPSE40KU+9NG0+ qt3VRSOD9vmohKqeBHIkLvzI0EP1yEQCpvwJYqyJMIyne3wyHJQhOdSVj cfNF2YZ5HXtaYhUYNxez5Sjg7KLTwh1kmjuHGwmtFd15uKzA4HOClTq/Q bwZ06peZfe379sw76SU2jaF/ajP0kkIxpiGyOk9QL0A7dWl87/37IjLBl Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10845"; a="366818170" X-IronPort-AV: E=Sophos;i="6.03,179,1694761200"; d="scan'208";a="366818170" Received: from orsmga006.jf.intel.com ([10.7.209.51]) by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Sep 2023 00:58:28 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10845"; a="725714068" X-IronPort-AV: E=Sophos;i="6.03,179,1694761200"; d="scan'208";a="725714068" Received: from irvmail002.ir.intel.com ([10.43.11.120]) by orsmga006.jf.intel.com with ESMTP; 27 Sep 2023 00:58:21 -0700 Received: from lincoln.igk.intel.com (lincoln.igk.intel.com [10.102.21.235]) by irvmail002.ir.intel.com (Postfix) with ESMTP id AF44D7EAC2; Wed, 27 Sep 2023 08:58:19 +0100 (IST) From: Larysa Zaremba To: bpf@vger.kernel.org Cc: Larysa Zaremba , ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org, martin.lau@linux.dev, song@kernel.org, yhs@fb.com, john.fastabend@gmail.com, kpsingh@kernel.org, sdf@google.com, haoluo@google.com, jolsa@kernel.org, David Ahern , Jakub Kicinski , Willem de Bruijn , Jesper Dangaard Brouer , Anatoly Burakov , Alexander Lobakin , Magnus Karlsson , Maryam Tahhan , xdp-hints@xdp-project.net, netdev@vger.kernel.org, Willem de Bruijn , Alexei Starovoitov , Simon Horman , Tariq Toukan , Saeed Mahameed , Maciej Fijalkowski Subject: [RFC bpf-next v2 17/24] selftests/bpf: Add flags and new hints to xdp_hw_metadata Date: Wed, 27 Sep 2023 09:51:17 +0200 Message-ID: <20230927075124.23941-18-larysa.zaremba@intel.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230927075124.23941-1-larysa.zaremba@intel.com> References: <20230927075124.23941-1-larysa.zaremba@intel.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,SPF_HELO_NONE, SPF_NONE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net X-Patchwork-Delegate: bpf@iogearbox.net X-Patchwork-State: RFC Add hints added in the previous patches (VLAN tag and checksum) to the xdp_hw_metadata program. Also, to make metadata layout more straightforward, add flags field to pass information about validity of every separate hint separately. Acked-by: Stanislav Fomichev Signed-off-by: Larysa Zaremba --- .../selftests/bpf/progs/xdp_hw_metadata.c | 38 +++++++++-- tools/testing/selftests/bpf/xdp_hw_metadata.c | 67 +++++++++++++++++-- tools/testing/selftests/bpf/xdp_metadata.h | 34 +++++++++- 3 files changed, 126 insertions(+), 13 deletions(-) diff --git a/tools/testing/selftests/bpf/progs/xdp_hw_metadata.c b/tools/testing/selftests/bpf/progs/xdp_hw_metadata.c index 63d7de6c6bbb..077081292199 100644 --- a/tools/testing/selftests/bpf/progs/xdp_hw_metadata.c +++ b/tools/testing/selftests/bpf/progs/xdp_hw_metadata.c @@ -20,6 +20,12 @@ extern int bpf_xdp_metadata_rx_timestamp(const struct xdp_md *ctx, __u64 *timestamp) __ksym; extern int bpf_xdp_metadata_rx_hash(const struct xdp_md *ctx, __u32 *hash, enum xdp_rss_hash_type *rss_type) __ksym; +extern int bpf_xdp_metadata_rx_vlan_tag(const struct xdp_md *ctx, + __be16 *vlan_proto, + __u16 *vlan_tci) __ksym; +extern int bpf_xdp_metadata_rx_csum(const struct xdp_md *ctx, + enum xdp_csum_status *csum_status, + __wsum *csum) __ksym; SEC("xdp") int rx(struct xdp_md *ctx) @@ -84,15 +90,35 @@ int rx(struct xdp_md *ctx) return XDP_PASS; } + meta->hint_valid = 0; + + meta->xdp_timestamp = bpf_ktime_get_tai_ns(); err = bpf_xdp_metadata_rx_timestamp(ctx, &meta->rx_timestamp); - if (!err) - meta->xdp_timestamp = bpf_ktime_get_tai_ns(); + if (err) + meta->rx_timestamp_err = err; + else + meta->hint_valid |= XDP_META_FIELD_TS; + + err = bpf_xdp_metadata_rx_hash(ctx, &meta->rx_hash, + &meta->rx_hash_type); + if (err) + meta->rx_hash_err = err; else - meta->rx_timestamp = 0; /* Used by AF_XDP as not avail signal */ + meta->hint_valid |= XDP_META_FIELD_RSS; - err = bpf_xdp_metadata_rx_hash(ctx, &meta->rx_hash, &meta->rx_hash_type); - if (err < 0) - meta->rx_hash_err = err; /* Used by AF_XDP as no hash signal */ + err = bpf_xdp_metadata_rx_vlan_tag(ctx, &meta->rx_vlan_proto, + &meta->rx_vlan_tci); + if (err) + meta->rx_vlan_tag_err = err; + else + meta->hint_valid |= XDP_META_FIELD_VLAN_TAG; + + err = bpf_xdp_metadata_rx_csum(ctx, &meta->rx_csum_status, + &meta->rx_csum); + if (err) + meta->rx_csum_err = err; + else + meta->hint_valid |= XDP_META_FIELD_CSUM; __sync_add_and_fetch(&pkts_redir, 1); return bpf_redirect_map(&xsk, ctx->rx_queue_index, XDP_PASS); diff --git a/tools/testing/selftests/bpf/xdp_hw_metadata.c b/tools/testing/selftests/bpf/xdp_hw_metadata.c index 613321eb84c1..7535baa7e7ef 100644 --- a/tools/testing/selftests/bpf/xdp_hw_metadata.c +++ b/tools/testing/selftests/bpf/xdp_hw_metadata.c @@ -19,6 +19,9 @@ #include "xsk.h" #include +#include +#include +#include #include #include #include @@ -150,21 +153,58 @@ static __u64 gettime(clockid_t clock_id) return (__u64) t.tv_sec * NANOSEC_PER_SEC + t.tv_nsec; } +#define VLAN_PRIO_MASK GENMASK(15, 13) /* Priority Code Point */ +#define VLAN_DEI_MASK GENMASK(12, 12) /* Drop Eligible Indicator */ +#define VLAN_VID_MASK GENMASK(11, 0) /* VLAN Identifier */ +static void print_vlan_tci(__u16 tag) +{ + __u16 vlan_id = FIELD_GET(VLAN_VID_MASK, tag); + __u8 pcp = FIELD_GET(VLAN_PRIO_MASK, tag); + bool dei = FIELD_GET(VLAN_DEI_MASK, tag); + + printf("PCP=%u, DEI=%d, VID=0x%X\n", pcp, dei, vlan_id); +} + +#define XDP_CHECKSUM_VERIFIED BIT(0) +#define XDP_CHECKSUM_COMPLETE BIT(1) + +struct partial_csum_info { + __u16 csum_start; + __u16 csum_offset; +}; + +static void print_csum_state(__u32 status, __u32 info) +{ + bool is_verified = status & XDP_CHECKSUM_VERIFIED; + + printf("Checksum status: "); + if (status & ~(XDP_CHECKSUM_COMPLETE | XDP_CHECKSUM_VERIFIED)) + printf("cannot be interpreted, status=0x%X\n", status); + + if (status & XDP_CHECKSUM_COMPLETE) + printf("complete, checksum=0x%X%s", info, + is_verified ? ", " : "\n"); + + if (is_verified) + printf("outermost checksum is verified\n"); +} + static void verify_xdp_metadata(void *data, clockid_t clock_id) { struct xdp_meta *meta; meta = data - sizeof(*meta); - if (meta->rx_hash_err < 0) - printf("No rx_hash err=%d\n", meta->rx_hash_err); - else + if (meta->hint_valid & XDP_META_FIELD_RSS) printf("rx_hash: 0x%X with RSS type:0x%X\n", meta->rx_hash, meta->rx_hash_type); + else + printf("No rx_hash, err=%d\n", meta->rx_hash_err); + + if (meta->hint_valid & XDP_META_FIELD_TS) { + printf("rx_timestamp: %llu (sec:%0.4f)\n", meta->rx_timestamp, + (double)meta->rx_timestamp / NANOSEC_PER_SEC); - printf("rx_timestamp: %llu (sec:%0.4f)\n", meta->rx_timestamp, - (double)meta->rx_timestamp / NANOSEC_PER_SEC); - if (meta->rx_timestamp) { __u64 usr_clock = gettime(clock_id); __u64 xdp_clock = meta->xdp_timestamp; __s64 delta_X = xdp_clock - meta->rx_timestamp; @@ -179,8 +219,23 @@ static void verify_xdp_metadata(void *data, clockid_t clock_id) usr_clock, (double)usr_clock / NANOSEC_PER_SEC, (double)delta_X2U / NANOSEC_PER_SEC, (double)delta_X2U / 1000); + } else { + printf("No rx_timestamp, err=%d\n", meta->rx_timestamp_err); + } + + if (meta->hint_valid & XDP_META_FIELD_VLAN_TAG) { + printf("rx_vlan_proto: 0x%X\n", ntohs(meta->rx_vlan_proto)); + printf("rx_vlan_tci: "); + print_vlan_tci(meta->rx_vlan_tci); + } else { + printf("No rx_vlan_tci or rx_vlan_proto, err=%d\n", + meta->rx_vlan_tag_err); } + if (meta->hint_valid & XDP_META_FIELD_CSUM) + print_csum_state(meta->rx_csum_status, meta->rx_csum); + else + printf("Checksum was not checked, err=%d\n", meta->rx_csum_err); } static void verify_skb_metadata(int fd) diff --git a/tools/testing/selftests/bpf/xdp_metadata.h b/tools/testing/selftests/bpf/xdp_metadata.h index 6664893c2c77..7df504dbab50 100644 --- a/tools/testing/selftests/bpf/xdp_metadata.h +++ b/tools/testing/selftests/bpf/xdp_metadata.h @@ -17,12 +17,44 @@ #define ETH_P_8021AD 0x88A8 #endif +#ifndef BIT +#define BIT(nr) (1 << (nr)) +#endif + +/* Non-existent checksum status */ +#define XDP_CHECKSUM_MAGIC BIT(2) + +enum xdp_meta_field { + XDP_META_FIELD_TS = BIT(0), + XDP_META_FIELD_RSS = BIT(1), + XDP_META_FIELD_VLAN_TAG = BIT(2), + XDP_META_FIELD_CSUM = BIT(3), +}; + struct xdp_meta { - __u64 rx_timestamp; + union { + __u64 rx_timestamp; + __s32 rx_timestamp_err; + }; __u64 xdp_timestamp; __u32 rx_hash; union { __u32 rx_hash_type; __s32 rx_hash_err; }; + union { + struct { + __be16 rx_vlan_proto; + __u16 rx_vlan_tci; + }; + __s32 rx_vlan_tag_err; + }; + union { + struct { + __u32 rx_csum_status; + __wsum rx_csum; + }; + __s32 rx_csum_err; + }; + enum xdp_meta_field hint_valid; };