From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E82F1C433EF for ; Thu, 7 Jul 2022 11:51:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233808AbiGGLv4 (ORCPT ); Thu, 7 Jul 2022 07:51:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55376 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235223AbiGGLvy (ORCPT ); Thu, 7 Jul 2022 07:51:54 -0400 Received: from mail-wr1-x42a.google.com (mail-wr1-x42a.google.com [IPv6:2a00:1450:4864:20::42a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 42D4A53D0D; Thu, 7 Jul 2022 04:51:53 -0700 (PDT) Received: by mail-wr1-x42a.google.com with SMTP id v16so14509975wrd.13; Thu, 07 Jul 2022 04:51:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=ejPnmCaORJdrMyGe4YE1VTQPE0oM/mTMwJ4lvV5CWyQ=; b=SK3A5sYXIVyTW3AVh10tPpO6KnSEQ4egjekYG6KZGAt+mCECxdG6mTPJ2p8ZWL5QFQ ouawLTWIMwVli8N8ljpIQvzIt1i0bcfMVXvjSO0cxiykpwts/Nc3OtQWaCnnhpW0SLUf hnfyQe2KuUpjk20kTFc92AmVn7sy9HrrlYiKEy2IqYe3NX9aOTLZZC6teTEa5va2mxPp t4mNV5ffHSaQrinWTcwMLEMTjEPiP9JKHC2ioeb+nFpvVg6r+Sobu680b3CcqD5L4vIz GO7Dn53HG5Tkza0e34Z6SuUNCsNlFa4EJsGADSd7+mXJD2RaMMQXYzRrdJBBJPHn11v7 uhmg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=ejPnmCaORJdrMyGe4YE1VTQPE0oM/mTMwJ4lvV5CWyQ=; b=HQx/x8KbUSLgCPo/6ynmRb1OkoDXs6/ntbBIye0XmJtU7lQkSS8bVubGcI1VaOXGW+ T8zU9BouiqgjdQcaizIigWy4P6qz48ibCz+BISKTR5e1quLTgpLhczPkrXWia3xoRcWA qxSr533mFRyjps291nG5nMh2VOPP36Zb4CcsfPBkYfj7KHUp0m7G8R0sU9PHZ1JkS2b+ b/LQ8CWJnuU5cov2M1tvBjJ9sutjnSXYgG3vpSthf5c81w5PosSmB0W64FjzBc/3tlNl Zgj3f2NOhQvlnqumzouRQYjPH/ZvjwkBuib8WQuwJzlKzlRFJuhBJV97HMePtSO5ikmh 8qfw== X-Gm-Message-State: AJIora/X41tyvQGKCwWbuZowgg/RHofLRBqAI+3CB2bNIf9Iv7jIWlwe d8kBwIKVwBPh4OCEurt/YJWiEaceQCsryK3QU9Y= X-Google-Smtp-Source: AGRyM1uytWO0KV2ZLFjSm4t05Yvv+I9jZy5pafRH9FHurUA3jy0l6i365aVoG7gkydeS5fXo6NxPTw== X-Received: by 2002:adf:ec0f:0:b0:21d:7771:c3cb with SMTP id x15-20020adfec0f000000b0021d7771c3cbmr10846010wrn.81.1657194711560; Thu, 07 Jul 2022 04:51:51 -0700 (PDT) Received: from 127.0.0.1localhost (188.28.125.106.threembb.co.uk. [188.28.125.106]) by smtp.gmail.com with ESMTPSA id u2-20020a5d5142000000b0021b966abc19sm37982131wrt.19.2022.07.07.04.51.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 07 Jul 2022 04:51:51 -0700 (PDT) From: Pavel Begunkov To: io-uring@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Cc: "David S . Miller" , Jakub Kicinski , Jonathan Lemon , Willem de Bruijn , Jens Axboe , David Ahern , kernel-team@fb.com, Pavel Begunkov Subject: [PATCH net-next v4 04/27] skbuff: add SKBFL_DONT_ORPHAN flag Date: Thu, 7 Jul 2022 12:49:35 +0100 Message-Id: X-Mailer: git-send-email 2.36.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org We don't want to list every single ubuf_info callback in skb_orphan_frags(), add a flag controlling the behaviour. Signed-off-by: Pavel Begunkov --- include/linux/skbuff.h | 8 +++++--- net/core/skbuff.c | 2 +- 2 files changed, 6 insertions(+), 4 deletions(-) diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index d3d10556f0fa..8e12b3b9ad6c 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -686,10 +686,13 @@ enum { * charged to the kernel memory. */ SKBFL_PURE_ZEROCOPY = BIT(2), + + SKBFL_DONT_ORPHAN = BIT(3), }; #define SKBFL_ZEROCOPY_FRAG (SKBFL_ZEROCOPY_ENABLE | SKBFL_SHARED_FRAG) -#define SKBFL_ALL_ZEROCOPY (SKBFL_ZEROCOPY_FRAG | SKBFL_PURE_ZEROCOPY) +#define SKBFL_ALL_ZEROCOPY (SKBFL_ZEROCOPY_FRAG | SKBFL_PURE_ZEROCOPY | \ + SKBFL_DONT_ORPHAN) /* * The callback notifies userspace to release buffers when skb DMA is done in @@ -3182,8 +3185,7 @@ static inline int skb_orphan_frags(struct sk_buff *skb, gfp_t gfp_mask) { if (likely(!skb_zcopy(skb))) return 0; - if (!skb_zcopy_is_nouarg(skb) && - skb_uarg(skb)->callback == msg_zerocopy_callback) + if (skb_shinfo(skb)->flags & SKBFL_DONT_ORPHAN) return 0; return skb_copy_ubufs(skb, gfp_mask); } diff --git a/net/core/skbuff.c b/net/core/skbuff.c index 09f56bfa2771..fc22b3d32052 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -1193,7 +1193,7 @@ static struct ubuf_info *msg_zerocopy_alloc(struct sock *sk, size_t size) uarg->len = 1; uarg->bytelen = size; uarg->zerocopy = 1; - uarg->flags = SKBFL_ZEROCOPY_FRAG; + uarg->flags = SKBFL_ZEROCOPY_FRAG | SKBFL_DONT_ORPHAN; refcount_set(&uarg->refcnt, 1); sock_hold(sk); -- 2.36.1