From patchwork Fri Aug 13 11:47:48 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lorenzo Bianconi X-Patchwork-Id: 12435335 X-Patchwork-Delegate: bpf@iogearbox.net Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 37EC0C4338F for ; Fri, 13 Aug 2021 11:49:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2242F61042 for ; Fri, 13 Aug 2021 11:49:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240372AbhHMLuM (ORCPT ); Fri, 13 Aug 2021 07:50:12 -0400 Received: from mail.kernel.org ([198.145.29.99]:44860 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239093AbhHMLuM (ORCPT ); Fri, 13 Aug 2021 07:50:12 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id A38BB610EA; Fri, 13 Aug 2021 11:49:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1628855385; bh=4egFTZCKZVcn22BotCe1jAvf3Uk0dgUZkZCLUZqHBxo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=rbzAv8MN7LudqBroSS3ONe6rbG7Tpqe72uNUreAXAKP3vF45HU8EYC3sXW7rEVCBs quHzhbTJGVvBWmtw4eIMW1Sv93xw1HYVw5MZdplm1AeHcroqwDexgp+/TTkJc+MG1s YUfsn92OQH1Jk4RwDqUBupvk8f35NVZ3rz09bHiAsno9ceBazoPH/hP1ZXefO0ro0Z cwzfmoWb051IqgGJvB7/zvbMb6q323vFLGRKOD2BNRjfGG+42wKZTj00dg/3oAxadw gwdg7sCQBeRMhwhb8h6rLPocrjNizH5catRiR0MTKDowonCpDkCgd+j1GY/UebG/rF i21atit+UTP+w== From: Lorenzo Bianconi To: bpf@vger.kernel.org, netdev@vger.kernel.org Cc: lorenzo.bianconi@redhat.com, davem@davemloft.net, kuba@kernel.org, ast@kernel.org, daniel@iogearbox.net, shayagr@amazon.com, john.fastabend@gmail.com, dsahern@kernel.org, brouer@redhat.com, echaudro@redhat.com, jasowang@redhat.com, alexander.duyck@gmail.com, saeed@kernel.org, maciej.fijalkowski@intel.com, magnus.karlsson@intel.com, tirthendu.sarkar@intel.com, toke@redhat.com Subject: [PATCH v11 bpf-next 07/18] xdp: add multi-buff support to xdp_return_{buff/frame} Date: Fri, 13 Aug 2021 13:47:48 +0200 Message-Id: <9093776110c2ca4f8cb02fb065347329336f9975.1628854454.git.lorenzo@kernel.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org X-Patchwork-Delegate: bpf@iogearbox.net Take into account if the received xdp_buff/xdp_frame is non-linear recycling/returning the frame memory to the allocator or into xdp_frame_bulk. Signed-off-by: Lorenzo Bianconi --- include/net/xdp.h | 18 ++++++++++++++-- net/core/xdp.c | 54 ++++++++++++++++++++++++++++++++++++++++++++++- 2 files changed, 69 insertions(+), 3 deletions(-) diff --git a/include/net/xdp.h b/include/net/xdp.h index 53cccdc9528c..d66e9877d773 100644 --- a/include/net/xdp.h +++ b/include/net/xdp.h @@ -306,10 +306,24 @@ void __xdp_release_frame(void *data, struct xdp_mem_info *mem); static inline void xdp_release_frame(struct xdp_frame *xdpf) { struct xdp_mem_info *mem = &xdpf->mem; + struct skb_shared_info *sinfo; + int i; /* Curr only page_pool needs this */ - if (mem->type == MEM_TYPE_PAGE_POOL) - __xdp_release_frame(xdpf->data, mem); + if (mem->type != MEM_TYPE_PAGE_POOL) + return; + + if (likely(!xdp_frame_is_mb(xdpf))) + goto out; + + sinfo = xdp_get_shared_info_from_frame(xdpf); + for (i = 0; i < sinfo->nr_frags; i++) { + struct page *page = skb_frag_page(&sinfo->frags[i]); + + __xdp_release_frame(page_address(page), mem); + } +out: + __xdp_release_frame(xdpf->data, mem); } int xdp_rxq_info_reg(struct xdp_rxq_info *xdp_rxq, diff --git a/net/core/xdp.c b/net/core/xdp.c index 504be3ce3ca9..1346fb8b3f50 100644 --- a/net/core/xdp.c +++ b/net/core/xdp.c @@ -376,12 +376,38 @@ static void __xdp_return(void *data, struct xdp_mem_info *mem, bool napi_direct, void xdp_return_frame(struct xdp_frame *xdpf) { + struct skb_shared_info *sinfo; + int i; + + if (likely(!xdp_frame_is_mb(xdpf))) + goto out; + + sinfo = xdp_get_shared_info_from_frame(xdpf); + for (i = 0; i < sinfo->nr_frags; i++) { + struct page *page = skb_frag_page(&sinfo->frags[i]); + + __xdp_return(page_address(page), &xdpf->mem, false, NULL); + } +out: __xdp_return(xdpf->data, &xdpf->mem, false, NULL); } EXPORT_SYMBOL_GPL(xdp_return_frame); void xdp_return_frame_rx_napi(struct xdp_frame *xdpf) { + struct skb_shared_info *sinfo; + int i; + + if (likely(!xdp_frame_is_mb(xdpf))) + goto out; + + sinfo = xdp_get_shared_info_from_frame(xdpf); + for (i = 0; i < sinfo->nr_frags; i++) { + struct page *page = skb_frag_page(&sinfo->frags[i]); + + __xdp_return(page_address(page), &xdpf->mem, true, NULL); + } +out: __xdp_return(xdpf->data, &xdpf->mem, true, NULL); } EXPORT_SYMBOL_GPL(xdp_return_frame_rx_napi); @@ -417,7 +443,7 @@ void xdp_return_frame_bulk(struct xdp_frame *xdpf, struct xdp_mem_allocator *xa; if (mem->type != MEM_TYPE_PAGE_POOL) { - __xdp_return(xdpf->data, &xdpf->mem, false, NULL); + xdp_return_frame(xdpf); return; } @@ -436,12 +462,38 @@ void xdp_return_frame_bulk(struct xdp_frame *xdpf, bq->xa = rhashtable_lookup(mem_id_ht, &mem->id, mem_id_rht_params); } + if (unlikely(xdp_frame_is_mb(xdpf))) { + struct skb_shared_info *sinfo; + int i; + + sinfo = xdp_get_shared_info_from_frame(xdpf); + for (i = 0; i < sinfo->nr_frags; i++) { + skb_frag_t *frag = &sinfo->frags[i]; + + bq->q[bq->count++] = skb_frag_address(frag); + if (bq->count == XDP_BULK_QUEUE_SIZE) + xdp_flush_frame_bulk(bq); + } + } bq->q[bq->count++] = xdpf->data; } EXPORT_SYMBOL_GPL(xdp_return_frame_bulk); void xdp_return_buff(struct xdp_buff *xdp) { + struct skb_shared_info *sinfo; + int i; + + if (likely(!xdp_buff_is_mb(xdp))) + goto out; + + sinfo = xdp_get_shared_info_from_buff(xdp); + for (i = 0; i < sinfo->nr_frags; i++) { + struct page *page = skb_frag_page(&sinfo->frags[i]); + + __xdp_return(page_address(page), &xdp->rxq->mem, true, xdp); + } +out: __xdp_return(xdp->data, &xdp->rxq->mem, true, xdp); }