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[188.28.201.74]) by smtp.gmail.com with ESMTPSA id x13-20020a5d60cd000000b0022af6c93340sm7717399wrt.17.2022.09.23.09.40.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 23 Sep 2022 09:40:22 -0700 (PDT) From: Pavel Begunkov To: netdev@vger.kernel.org Cc: "David S . Miller" , Jakub Kicinski , linux-kernel@vger.kernel.org, xen-devel@lists.xenproject.org, Wei Liu , Paul Durrant , kvm@vger.kernel.org, virtualization@lists.linux-foundation.org, "Michael S . Tsirkin" , Jason Wang , Pavel Begunkov Subject: [PATCH net-next 1/4] net: introduce struct ubuf_info_msgzc Date: Fri, 23 Sep 2022 17:39:01 +0100 Message-Id: <641bb6844e67e639a9403b8eab96c3fa34659e2a.1663892211.git.asml.silence@gmail.com> X-Mailer: git-send-email 2.37.2 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org We're going to split struct ubuf_info and leave there only mandatory fields. Users are free to extend it. Add struct ubuf_info_msgzc, which will be an extended version for MSG_ZEROCOPY and some other users. It duplicates of struct ubuf_info for now and will be removed in a couple of patches. Signed-off-by: Pavel Begunkov --- include/linux/skbuff.h | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index f15d5b62539b..fd7dcb977fdf 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -554,7 +554,28 @@ struct ubuf_info { } mmp; }; +struct ubuf_info_msgzc { + struct ubuf_info ubuf; + + union { + struct { + unsigned long desc; + void *ctx; + }; + struct { + u32 id; + u16 len; + u16 zerocopy:1; + u32 bytelen; + }; + }; + + struct mmpin mmp; +}; + #define skb_uarg(SKB) ((struct ubuf_info *)(skb_shinfo(SKB)->destructor_arg)) +#define uarg_to_msgzc(ubuf_ptr) container_of((ubuf_ptr), struct ubuf_info_msgzc, \ + ubuf) int mm_account_pinned_pages(struct mmpin *mmp, size_t size); void mm_unaccount_pinned_pages(struct mmpin *mmp); From patchwork Fri Sep 23 16:39:02 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pavel Begunkov X-Patchwork-Id: 12986802 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 CB64EECAAD8 for ; Fri, 23 Sep 2022 16:40:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231148AbiIWQkc (ORCPT ); Fri, 23 Sep 2022 12:40:32 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58422 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229953AbiIWQk1 (ORCPT ); Fri, 23 Sep 2022 12:40:27 -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 59D83719BE; Fri, 23 Sep 2022 09:40:26 -0700 (PDT) Received: by mail-wr1-x42a.google.com with SMTP id g3so776661wrq.13; Fri, 23 Sep 2022 09:40:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date; bh=NLIYqCB5GFGbnjqA6dYmmqdLI8BuNFTVxSCPXONSBRc=; b=owDxYda7B4frXz3u0Fwc1/mPY0PkIoc9YEt4hkPPANfeq4CAFBjXeUytt806Zgzrh2 Oflmk3RWPGkL3H4Kqr+rh0g6ue3kNa5qh9EG2VFQ5SqjrD782ppbdaoa2zK8ufjpi3tg YpW05bXLXbqTGO0ZMSAueq+peDDRvbo8UVlb48ZmGp0vWAJpfOl00oTe17PDhCBXTmcj 4LkSJcqD4FNFtW3MKLedobmMatlst3bdPyImM5Y1cg33OA2+GGukbR5y3KFMrsGkoqPe QYLUipMNRbiIvHjo0pc7wNIYe7Hj0Xd06Y+WNBvXMB+pfT+4vyFvrFYbZ+73u9ePpxWd LFHw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date; bh=NLIYqCB5GFGbnjqA6dYmmqdLI8BuNFTVxSCPXONSBRc=; b=diyoHVNJnMp+XooHEQKBmPjJK+sEvvY/rBAg8SaW8S8Og9OgT9mfzZgVoh60y47gQO C76du9I5y/tEPyX+AI7Nz9whFPjje4GzmB9XvUJWfc9nqCXav9Sp3W7jvbQTGsStxa4p N9g18WgKfBL3sy8cUCXbE4VgP9Mh2O2ihIwqx/IhPQuf9kddv/kMOr6/7fzbuyj/OG3A 4Z1FpRDQPXxbmh6CDu9oY0U0LHapmxa9kFmZRQa78j2E7UQiTk57r3TGL+P9tbyh5jrb aX44WNq3+ySgGheetT7yGmIAIHRp9XRxFd7Q5m9V4zSQKwA5TshDrJEteK5VMv5LA3Ax Q3lg== X-Gm-Message-State: ACrzQf3Hdry4p1zSDYSw+Kx/I3CL5AIDn5/YosDroVSC6RyV2zDUl1CM +ZiIkujqXoKR3KKNpLp6r54KIUnEbj8= X-Google-Smtp-Source: AMsMyM5HMaxWgOxUGbCzg/XjKD/kmOOlcN0KKz9OmaE/RAZn/7aZ8z59Qz72lGSep1WOF16x4j6q2w== X-Received: by 2002:a5d:5c06:0:b0:22a:7b52:cda6 with SMTP id cc6-20020a5d5c06000000b0022a7b52cda6mr5635717wrb.485.1663951224622; Fri, 23 Sep 2022 09:40:24 -0700 (PDT) Received: from 127.0.0.1localhost (188.28.201.74.threembb.co.uk. [188.28.201.74]) by smtp.gmail.com with ESMTPSA id x13-20020a5d60cd000000b0022af6c93340sm7717399wrt.17.2022.09.23.09.40.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 23 Sep 2022 09:40:24 -0700 (PDT) From: Pavel Begunkov To: netdev@vger.kernel.org Cc: "David S . Miller" , Jakub Kicinski , linux-kernel@vger.kernel.org, xen-devel@lists.xenproject.org, Wei Liu , Paul Durrant , kvm@vger.kernel.org, virtualization@lists.linux-foundation.org, "Michael S . Tsirkin" , Jason Wang , Pavel Begunkov Subject: [PATCH net-next 2/4] xen/netback: use struct ubuf_info_msgzc Date: Fri, 23 Sep 2022 17:39:02 +0100 Message-Id: <5e00bc6d4d8c3fdcf3ed02549ba8a36d5552e56c.1663892211.git.asml.silence@gmail.com> X-Mailer: git-send-email 2.37.2 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org struct ubuf_info will be changed, use ubuf_info_msgzc instead. Signed-off-by: Pavel Begunkov --- drivers/net/xen-netback/common.h | 2 +- drivers/net/xen-netback/interface.c | 4 ++-- drivers/net/xen-netback/netback.c | 7 ++++--- 3 files changed, 7 insertions(+), 6 deletions(-) diff --git a/drivers/net/xen-netback/common.h b/drivers/net/xen-netback/common.h index 8174d7b2966c..1545cbee77a4 100644 --- a/drivers/net/xen-netback/common.h +++ b/drivers/net/xen-netback/common.h @@ -62,7 +62,7 @@ struct pending_tx_info { * ubuf_to_vif is a helper which finds the struct xenvif from a pointer * to this field. */ - struct ubuf_info callback_struct; + struct ubuf_info_msgzc callback_struct; }; #define XEN_NETIF_TX_RING_SIZE __CONST_RING_SIZE(xen_netif_tx, XEN_PAGE_SIZE) diff --git a/drivers/net/xen-netback/interface.c b/drivers/net/xen-netback/interface.c index fb32ae82d9b0..e579ecd40b74 100644 --- a/drivers/net/xen-netback/interface.c +++ b/drivers/net/xen-netback/interface.c @@ -591,8 +591,8 @@ int xenvif_init_queue(struct xenvif_queue *queue) } for (i = 0; i < MAX_PENDING_REQS; i++) { - queue->pending_tx_info[i].callback_struct = (struct ubuf_info) - { .callback = xenvif_zerocopy_callback, + queue->pending_tx_info[i].callback_struct = (struct ubuf_info_msgzc) + { { .callback = xenvif_zerocopy_callback }, { { .ctx = NULL, .desc = i } } }; queue->grant_tx_handle[i] = NETBACK_INVALID_HANDLE; diff --git a/drivers/net/xen-netback/netback.c b/drivers/net/xen-netback/netback.c index a256695fc89e..3d2081bbbc86 100644 --- a/drivers/net/xen-netback/netback.c +++ b/drivers/net/xen-netback/netback.c @@ -133,7 +133,7 @@ static inline unsigned long idx_to_kaddr(struct xenvif_queue *queue, /* Find the containing VIF's structure from a pointer in pending_tx_info array */ -static inline struct xenvif_queue *ubuf_to_queue(const struct ubuf_info *ubuf) +static inline struct xenvif_queue *ubuf_to_queue(const struct ubuf_info_msgzc *ubuf) { u16 pending_idx = ubuf->desc; struct pending_tx_info *temp = @@ -1228,11 +1228,12 @@ static int xenvif_tx_submit(struct xenvif_queue *queue) return work_done; } -void xenvif_zerocopy_callback(struct sk_buff *skb, struct ubuf_info *ubuf, +void xenvif_zerocopy_callback(struct sk_buff *skb, struct ubuf_info *ubuf_base, bool zerocopy_success) { unsigned long flags; pending_ring_idx_t index; + struct ubuf_info_msgzc *ubuf = uarg_to_msgzc(ubuf_base); struct xenvif_queue *queue = ubuf_to_queue(ubuf); /* This is the only place where we grab this lock, to protect callbacks @@ -1241,7 +1242,7 @@ void xenvif_zerocopy_callback(struct sk_buff *skb, struct ubuf_info *ubuf, spin_lock_irqsave(&queue->callback_lock, flags); do { u16 pending_idx = ubuf->desc; - ubuf = (struct ubuf_info *) ubuf->ctx; + ubuf = (struct ubuf_info_msgzc *) ubuf->ctx; BUG_ON(queue->dealloc_prod - queue->dealloc_cons >= MAX_PENDING_REQS); index = pending_index(queue->dealloc_prod); From patchwork Fri Sep 23 16:39:03 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pavel Begunkov X-Patchwork-Id: 12986803 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 07D50C6FA8B for ; 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[188.28.201.74]) by smtp.gmail.com with ESMTPSA id x13-20020a5d60cd000000b0022af6c93340sm7717399wrt.17.2022.09.23.09.40.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 23 Sep 2022 09:40:25 -0700 (PDT) From: Pavel Begunkov To: netdev@vger.kernel.org Cc: "David S . Miller" , Jakub Kicinski , linux-kernel@vger.kernel.org, xen-devel@lists.xenproject.org, Wei Liu , Paul Durrant , kvm@vger.kernel.org, virtualization@lists.linux-foundation.org, "Michael S . Tsirkin" , Jason Wang , Pavel Begunkov Subject: [PATCH net-next 3/4] vhost/net: use struct ubuf_info_msgzc Date: Fri, 23 Sep 2022 17:39:03 +0100 Message-Id: <126df081c74ecf06de383b4fdaad5080346f93dd.1663892211.git.asml.silence@gmail.com> X-Mailer: git-send-email 2.37.2 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org struct ubuf_info will be changed, use ubuf_info_msgzc instead. Signed-off-by: Pavel Begunkov --- drivers/vhost/net.c | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-) diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c index 68e4ecd1cc0e..d7a04d573988 100644 --- a/drivers/vhost/net.c +++ b/drivers/vhost/net.c @@ -118,7 +118,7 @@ struct vhost_net_virtqueue { /* Number of XDP frames batched */ int batched_xdp; /* an array of userspace buffers info */ - struct ubuf_info *ubuf_info; + struct ubuf_info_msgzc *ubuf_info; /* Reference counting for outstanding ubufs. * Protected by vq mutex. Writers must also take device mutex. */ struct vhost_net_ubuf_ref *ubufs; @@ -382,8 +382,9 @@ static void vhost_zerocopy_signal_used(struct vhost_net *net, } static void vhost_zerocopy_callback(struct sk_buff *skb, - struct ubuf_info *ubuf, bool success) + struct ubuf_info *ubuf_base, bool success) { + struct ubuf_info_msgzc *ubuf = uarg_to_msgzc(ubuf_base); struct vhost_net_ubuf_ref *ubufs = ubuf->ctx; struct vhost_virtqueue *vq = ubufs->vq; int cnt; @@ -871,7 +872,7 @@ static void handle_tx_zerocopy(struct vhost_net *net, struct socket *sock) size_t len, total_len = 0; int err; struct vhost_net_ubuf_ref *ubufs; - struct ubuf_info *ubuf; + struct ubuf_info_msgzc *ubuf; bool zcopy_used; int sent_pkts = 0; @@ -907,14 +908,14 @@ static void handle_tx_zerocopy(struct vhost_net *net, struct socket *sock) ubuf = nvq->ubuf_info + nvq->upend_idx; vq->heads[nvq->upend_idx].id = cpu_to_vhost32(vq, head); vq->heads[nvq->upend_idx].len = VHOST_DMA_IN_PROGRESS; - ubuf->callback = vhost_zerocopy_callback; ubuf->ctx = nvq->ubufs; ubuf->desc = nvq->upend_idx; - ubuf->flags = SKBFL_ZEROCOPY_FRAG; - refcount_set(&ubuf->refcnt, 1); + ubuf->ubuf.callback = vhost_zerocopy_callback; + ubuf->ubuf.flags = SKBFL_ZEROCOPY_FRAG; + refcount_set(&ubuf->ubuf.refcnt, 1); msg.msg_control = &ctl; ctl.type = TUN_MSG_UBUF; - ctl.ptr = ubuf; + ctl.ptr = &ubuf->ubuf; msg.msg_controllen = sizeof(ctl); ubufs = nvq->ubufs; atomic_inc(&ubufs->refcount); From patchwork Fri Sep 23 16:39:04 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pavel Begunkov X-Patchwork-Id: 12986804 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 600FCC6FA8B for ; Fri, 23 Sep 2022 16:40:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231808AbiIWQk4 (ORCPT ); Fri, 23 Sep 2022 12:40:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58814 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231277AbiIWQkd (ORCPT ); Fri, 23 Sep 2022 12:40:33 -0400 Received: from mail-wm1-x329.google.com (mail-wm1-x329.google.com [IPv6:2a00:1450:4864:20::329]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 79E7081B0E; Fri, 23 Sep 2022 09:40:30 -0700 (PDT) Received: by mail-wm1-x329.google.com with SMTP id e18so582175wmq.3; Fri, 23 Sep 2022 09:40:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date; bh=9VVplsCxvC3CPJyNAguid6PlNyGw4lN66t6t3nf9Zaw=; b=YX4cbnzVIadel+pT1A6WodnDs0MR3NSCVsnHE38CJKF7XkI7KvaIQ4X6UmO2SfaMby 3VG63f3bamCi8YVL8ww08dism3Nm3ZvPgDMvFHyrKNRzINXMBssaysY/QDsZovrtNXWO gddHNXxGWa8BakVKjQ5YbFO8g393XpvaAu125LTZaJ3U/JaL0wKZvINwFV4DLmKgHz7T Xw7f7SfpPz9S5UhKJqbPOz8SYQZLUnnVbiqzammFHsqMEzmYr/Jf/7M227Gu2RTGDhGm G+jXB2dWbPryASB1xMe7LrokxjofXsZVvU+X/L2122P0YwcjI8IYTMdbFPhAAa4OkK00 foRA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date; bh=9VVplsCxvC3CPJyNAguid6PlNyGw4lN66t6t3nf9Zaw=; b=gZsy9Iu9F1pbRrQP0UCxZ64VgkCDoheQ+YD333h/i3uSw9L0sII1XjqVfweMat1y3f HaOq72yt33u81XmjQ2Y+Ayjbk6fAz2hranD3/hVria2l+PyRv2kNH+tFeWa2br5Hcm5o OIUYlyzH5Efa7IjPKL1Hi7b+ZiszrU/VYL8kcuopwsQxEhDacV8ki5fLL4qKfioDwFv/ WWMWe3lwUuixQ94n9/wFz7aTFXztgoKvIi7qo3c/uV9oR+gZYPbVLHM9rquuSKkQ/3iO g8jqHEvEqtji8RQGfOiCmmLqutAo6QdnqQQR5ox4KsZrfc+yTnxQ+mq/U6cOIytEDh8b a68Q== X-Gm-Message-State: ACrzQf0kIbViDCk26+5cvSny2hVS2kbJFhTFRtltxG0n4cD+NQVyBkJZ lWtap/amFeQAwXFDYAnF7y4g5KBLXxI= X-Google-Smtp-Source: AMsMyM6Fs/pfy41Rfyr/MfeH4GoV13INTvx0st23vngXOgKxULEpbfBhZr8VAlVXwkSzQowWksWZFQ== X-Received: by 2002:a05:600c:1989:b0:3b4:b6b6:737 with SMTP id t9-20020a05600c198900b003b4b6b60737mr6550166wmq.79.1663951227773; Fri, 23 Sep 2022 09:40:27 -0700 (PDT) Received: from 127.0.0.1localhost (188.28.201.74.threembb.co.uk. [188.28.201.74]) by smtp.gmail.com with ESMTPSA id x13-20020a5d60cd000000b0022af6c93340sm7717399wrt.17.2022.09.23.09.40.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 23 Sep 2022 09:40:27 -0700 (PDT) From: Pavel Begunkov To: netdev@vger.kernel.org Cc: "David S . Miller" , Jakub Kicinski , linux-kernel@vger.kernel.org, xen-devel@lists.xenproject.org, Wei Liu , Paul Durrant , kvm@vger.kernel.org, virtualization@lists.linux-foundation.org, "Michael S . Tsirkin" , Jason Wang , Pavel Begunkov Subject: [PATCH net-next 4/4] net: shrink struct ubuf_info Date: Fri, 23 Sep 2022 17:39:04 +0100 Message-Id: X-Mailer: git-send-email 2.37.2 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org We can benefit from a smaller struct ubuf_info, so leave only mandatory fields and let users to decide how they want to extend it. Convert MSG_ZEROCOPY to struct ubuf_info_msgzc and remove duplicated fields. This reduces the size from 48 bytes to just 16. Signed-off-by: Pavel Begunkov --- include/linux/skbuff.h | 22 ++++------------------ net/core/skbuff.c | 38 +++++++++++++++++++++----------------- net/ipv4/ip_output.c | 2 +- net/ipv4/tcp.c | 2 +- net/ipv6/ip6_output.c | 2 +- 5 files changed, 28 insertions(+), 38 deletions(-) diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index fd7dcb977fdf..920eb6413fee 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -533,25 +533,8 @@ enum { struct ubuf_info { void (*callback)(struct sk_buff *, struct ubuf_info *, bool zerocopy_success); - union { - struct { - unsigned long desc; - void *ctx; - }; - struct { - u32 id; - u16 len; - u16 zerocopy:1; - u32 bytelen; - }; - }; refcount_t refcnt; u8 flags; - - struct mmpin { - struct user_struct *user; - unsigned int num_pg; - } mmp; }; struct ubuf_info_msgzc { @@ -570,7 +553,10 @@ struct ubuf_info_msgzc { }; }; - struct mmpin mmp; + struct mmpin { + struct user_struct *user; + unsigned int num_pg; + } mmp; }; #define skb_uarg(SKB) ((struct ubuf_info *)(skb_shinfo(SKB)->destructor_arg)) diff --git a/net/core/skbuff.c b/net/core/skbuff.c index f1b8b20fc20b..bbcfb1c7f59e 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -1188,7 +1188,7 @@ EXPORT_SYMBOL_GPL(mm_unaccount_pinned_pages); static struct ubuf_info *msg_zerocopy_alloc(struct sock *sk, size_t size) { - struct ubuf_info *uarg; + struct ubuf_info_msgzc *uarg; struct sk_buff *skb; WARN_ON_ONCE(!in_task()); @@ -1206,19 +1206,19 @@ static struct ubuf_info *msg_zerocopy_alloc(struct sock *sk, size_t size) return NULL; } - uarg->callback = msg_zerocopy_callback; + uarg->ubuf.callback = msg_zerocopy_callback; uarg->id = ((u32)atomic_inc_return(&sk->sk_zckey)) - 1; uarg->len = 1; uarg->bytelen = size; uarg->zerocopy = 1; - uarg->flags = SKBFL_ZEROCOPY_FRAG | SKBFL_DONT_ORPHAN; - refcount_set(&uarg->refcnt, 1); + uarg->ubuf.flags = SKBFL_ZEROCOPY_FRAG | SKBFL_DONT_ORPHAN; + refcount_set(&uarg->ubuf.refcnt, 1); sock_hold(sk); - return uarg; + return &uarg->ubuf; } -static inline struct sk_buff *skb_from_uarg(struct ubuf_info *uarg) +static inline struct sk_buff *skb_from_uarg(struct ubuf_info_msgzc *uarg) { return container_of((void *)uarg, struct sk_buff, cb); } @@ -1227,6 +1227,7 @@ struct ubuf_info *msg_zerocopy_realloc(struct sock *sk, size_t size, struct ubuf_info *uarg) { if (uarg) { + struct ubuf_info_msgzc *uarg_zc; const u32 byte_limit = 1 << 19; /* limit to a few TSO */ u32 bytelen, next; @@ -1242,8 +1243,9 @@ struct ubuf_info *msg_zerocopy_realloc(struct sock *sk, size_t size, return NULL; } - bytelen = uarg->bytelen + size; - if (uarg->len == USHRT_MAX - 1 || bytelen > byte_limit) { + uarg_zc = uarg_to_msgzc(uarg); + bytelen = uarg_zc->bytelen + size; + if (uarg_zc->len == USHRT_MAX - 1 || bytelen > byte_limit) { /* TCP can create new skb to attach new uarg */ if (sk->sk_type == SOCK_STREAM) goto new_alloc; @@ -1251,11 +1253,11 @@ struct ubuf_info *msg_zerocopy_realloc(struct sock *sk, size_t size, } next = (u32)atomic_read(&sk->sk_zckey); - if ((u32)(uarg->id + uarg->len) == next) { - if (mm_account_pinned_pages(&uarg->mmp, size)) + if ((u32)(uarg_zc->id + uarg_zc->len) == next) { + if (mm_account_pinned_pages(&uarg_zc->mmp, size)) return NULL; - uarg->len++; - uarg->bytelen = bytelen; + uarg_zc->len++; + uarg_zc->bytelen = bytelen; atomic_set(&sk->sk_zckey, ++next); /* no extra ref when appending to datagram (MSG_MORE) */ @@ -1291,7 +1293,7 @@ static bool skb_zerocopy_notify_extend(struct sk_buff *skb, u32 lo, u16 len) return true; } -static void __msg_zerocopy_callback(struct ubuf_info *uarg) +static void __msg_zerocopy_callback(struct ubuf_info_msgzc *uarg) { struct sk_buff *tail, *skb = skb_from_uarg(uarg); struct sock_exterr_skb *serr; @@ -1344,19 +1346,21 @@ static void __msg_zerocopy_callback(struct ubuf_info *uarg) void msg_zerocopy_callback(struct sk_buff *skb, struct ubuf_info *uarg, bool success) { - uarg->zerocopy = uarg->zerocopy & success; + struct ubuf_info_msgzc *uarg_zc = uarg_to_msgzc(uarg); + + uarg_zc->zerocopy = uarg_zc->zerocopy & success; if (refcount_dec_and_test(&uarg->refcnt)) - __msg_zerocopy_callback(uarg); + __msg_zerocopy_callback(uarg_zc); } EXPORT_SYMBOL_GPL(msg_zerocopy_callback); void msg_zerocopy_put_abort(struct ubuf_info *uarg, bool have_uref) { - struct sock *sk = skb_from_uarg(uarg)->sk; + struct sock *sk = skb_from_uarg(uarg_to_msgzc(uarg))->sk; atomic_dec(&sk->sk_zckey); - uarg->len--; + uarg_to_msgzc(uarg)->len--; if (have_uref) msg_zerocopy_callback(NULL, uarg, true); diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c index 8201cd423ff9..1ae83ad629b2 100644 --- a/net/ipv4/ip_output.c +++ b/net/ipv4/ip_output.c @@ -1043,7 +1043,7 @@ static int __ip_append_data(struct sock *sk, paged = true; zc = true; } else { - uarg->zerocopy = 0; + uarg_to_msgzc(uarg)->zerocopy = 0; skb_zcopy_set(skb, uarg, &extra_uref); } } diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index 829beee3fa32..34fd52c07534 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -1239,7 +1239,7 @@ int tcp_sendmsg_locked(struct sock *sk, struct msghdr *msg, size_t size) } zc = sk->sk_route_caps & NETIF_F_SG; if (!zc) - uarg->zerocopy = 0; + uarg_to_msgzc(uarg)->zerocopy = 0; } } diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c index e3dbb32b70dc..2f279cbd2648 100644 --- a/net/ipv6/ip6_output.c +++ b/net/ipv6/ip6_output.c @@ -1569,7 +1569,7 @@ static int __ip6_append_data(struct sock *sk, paged = true; zc = true; } else { - uarg->zerocopy = 0; + uarg_to_msgzc(uarg)->zerocopy = 0; skb_zcopy_set(skb, uarg, &extra_uref); } }