From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by mail.toke.dk (Postfix) with ESMTPS id 89E3BA06421 for ; Fri, 12 May 2023 17:28:58 +0200 (CEST) Authentication-Results: mail.toke.dk; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.a=rsa-sha256 header.s=Intel header.b=SLJ9DyeD DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1683905338; x=1715441338; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=S/i4FZlWSvJW010cQ5fIEi6AdM6FNT6Vg7Wn94JIdbs=; b=SLJ9DyeDt3ykI8gWSHghoCMpXnaWwt7HMmnNuyp0ut57lTuIJ4hVdBJS 5uzWpnI9u1jexhVTAu231E1gc7VqnRx+ShcOOcafEwgNqLg3lcVsjeiaG c/DNiUXPu+b6/fsxFBtjY1AAqeFqsShNx36eQSEnP3r9rUGWe29MNQguJ GC7x7PldbVv3ApU6qGDKZg/Tlo/rczDiQYape3FWUu2exiwxJ5g9h2Bzf ct0Fkgx3ROiEfMNH21lf3l/3fteYYYIu9v4aondRGFm4wM7fXHRkWdaXi vCFKdzLORXCWFksrOLhb3yGhKguQmmXFhZggBHBdPhhykw2QC/CkE8cma A==; X-IronPort-AV: E=McAfee;i="6600,9927,10708"; a="349653384" X-IronPort-AV: E=Sophos;i="5.99,269,1677571200"; d="scan'208";a="349653384" Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 May 2023 08:28:56 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10708"; a="1030124561" X-IronPort-AV: E=Sophos;i="5.99,269,1677571200"; d="scan'208";a="1030124561" Received: from irvmail002.ir.intel.com ([10.43.11.120]) by fmsmga005.fm.intel.com with ESMTP; 12 May 2023 08:28:52 -0700 Received: from lincoln.igk.intel.com (lincoln.igk.intel.com [10.102.21.235]) by irvmail002.ir.intel.com (Postfix) with ESMTP id 825F9369EF; Fri, 12 May 2023 16:28:50 +0100 (IST) From: Larysa Zaremba To: bpf@vger.kernel.org Date: Fri, 12 May 2023 17:26:01 +0200 Message-Id: <20230512152607.992209-10-larysa.zaremba@intel.com> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20230512152607.992209-1-larysa.zaremba@intel.com> References: <20230512152607.992209-1-larysa.zaremba@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Message-ID-Hash: RMLUT3U3CSHFPNNRI5FKADEXGUKHUFDX X-Message-ID-Hash: RMLUT3U3CSHFPNNRI5FKADEXGUKHUFDX X-MailFrom: larysa.zaremba@intel.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header CC: Larysa Zaremba , Stanislav Fomichev , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Jakub Kicinski , Martin KaFai Lau , Song Liu , Yonghong Song , John Fastabend , KP Singh , Jiri Olsa , Jesse Brandeburg , Tony Nguyen , Anatoly Burakov , Jesper Dangaard Brouer , Alexander Lobakin , Magnus Karlsson , Maryam Tahhan , xdp-hints@xdp-project.net, netdev@vger.kernel.org, intel-wired-lan@lists.osuosl.org, linux-kernel@vger.kernel.org X-Mailman-Version: 3.3.8 Precedence: list Subject: [xdp-hints] [PATCH RESEND bpf-next 09/15] xdp: Add VLAN tag hint List-Id: XDP hardware hints design discussion Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: Implement functionality that enables drivers to expose VLAN tag to XDP code. Signed-off-by: Larysa Zaremba --- Documentation/networking/xdp-rx-metadata.rst | 11 ++++++++- include/linux/netdevice.h | 2 ++ include/net/xdp.h | 4 ++++ kernel/bpf/offload.c | 4 ++++ net/core/xdp.c | 24 ++++++++++++++++++++ 5 files changed, 44 insertions(+), 1 deletion(-) diff --git a/Documentation/networking/xdp-rx-metadata.rst b/Documentation/networking/xdp-rx-metadata.rst index 25ce72af81c2..73a78029c596 100644 --- a/Documentation/networking/xdp-rx-metadata.rst +++ b/Documentation/networking/xdp-rx-metadata.rst @@ -18,7 +18,16 @@ Currently, the following kfuncs are supported. In the future, as more metadata is supported, this set will grow: .. kernel-doc:: net/core/xdp.c - :identifiers: bpf_xdp_metadata_rx_timestamp bpf_xdp_metadata_rx_hash + :identifiers: bpf_xdp_metadata_rx_timestamp + +.. kernel-doc:: net/core/xdp.c + :identifiers: bpf_xdp_metadata_rx_hash + +.. kernel-doc:: net/core/xdp.c + :identifiers: bpf_xdp_metadata_rx_ctag + +.. kernel-doc:: net/core/xdp.c + :identifiers: bpf_xdp_metadata_rx_stag An XDP program can use these kfuncs to read the metadata into stack variables for its own consumption. Or, to pass the metadata on to other diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 08fbd4622ccf..fdae37fe11f5 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -1655,6 +1655,8 @@ struct xdp_metadata_ops { int (*xmo_rx_timestamp)(const struct xdp_md *ctx, u64 *timestamp); int (*xmo_rx_hash)(const struct xdp_md *ctx, u32 *hash, enum xdp_rss_hash_type *rss_type); + int (*xmo_rx_ctag)(const struct xdp_md *ctx, u16 *vlan_tag); + int (*xmo_rx_stag)(const struct xdp_md *ctx, u16 *vlan_tag); }; /** diff --git a/include/net/xdp.h b/include/net/xdp.h index 6381560efae2..2db7439fc60f 100644 --- a/include/net/xdp.h +++ b/include/net/xdp.h @@ -389,6 +389,10 @@ void xdp_attachment_setup(struct xdp_attachment_info *info, bpf_xdp_metadata_rx_timestamp) \ XDP_METADATA_KFUNC(XDP_METADATA_KFUNC_RX_HASH, \ bpf_xdp_metadata_rx_hash) \ + XDP_METADATA_KFUNC(XDP_METADATA_KFUNC_RX_CTAG, \ + bpf_xdp_metadata_rx_ctag) \ + XDP_METADATA_KFUNC(XDP_METADATA_KFUNC_RX_STAG, \ + bpf_xdp_metadata_rx_stag) \ enum { #define XDP_METADATA_KFUNC(name, _) name, diff --git a/kernel/bpf/offload.c b/kernel/bpf/offload.c index d9c9f45e3529..2c6b6e82cfac 100644 --- a/kernel/bpf/offload.c +++ b/kernel/bpf/offload.c @@ -848,6 +848,10 @@ void *bpf_dev_bound_resolve_kfunc(struct bpf_prog *prog, u32 func_id) p = ops->xmo_rx_timestamp; else if (func_id == bpf_xdp_metadata_kfunc_id(XDP_METADATA_KFUNC_RX_HASH)) p = ops->xmo_rx_hash; + else if (func_id == bpf_xdp_metadata_kfunc_id(XDP_METADATA_KFUNC_RX_CTAG)) + p = ops->xmo_rx_ctag; + else if (func_id == bpf_xdp_metadata_kfunc_id(XDP_METADATA_KFUNC_RX_STAG)) + p = ops->xmo_rx_stag; out: up_read(&bpf_devs_lock); diff --git a/net/core/xdp.c b/net/core/xdp.c index 41e5ca8643ec..eff21501609f 100644 --- a/net/core/xdp.c +++ b/net/core/xdp.c @@ -738,6 +738,30 @@ __bpf_kfunc int bpf_xdp_metadata_rx_hash(const struct xdp_md *ctx, u32 *hash, return -EOPNOTSUPP; } +/** + * bpf_xdp_metadata_rx_ctag - Read XDP packet inner vlan tag. + * @ctx: XDP context pointer. + * @vlan_tag: Return value pointer. + * + * Returns 0 on success or ``-errno`` on error. + */ +__bpf_kfunc int bpf_xdp_metadata_rx_ctag(const struct xdp_md *ctx, u16 *vlan_tag) +{ + return -EOPNOTSUPP; +} + +/** + * bpf_xdp_metadata_rx_stag - Read XDP packet outer vlan tag. + * @ctx: XDP context pointer. + * @vlan_tag: Return value pointer. + * + * Returns 0 on success or ``-errno`` on error. + */ +__bpf_kfunc int bpf_xdp_metadata_rx_stag(const struct xdp_md *ctx, u16 *vlan_tag) +{ + return -EOPNOTSUPP; +} + __diag_pop(); BTF_SET8_START(xdp_metadata_kfunc_ids) -- 2.35.3