From patchwork Mon Sep 2 12:03:11 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yunsheng Lin X-Patchwork-Id: 13787176 X-Patchwork-Delegate: kuba@kernel.org Received: from szxga08-in.huawei.com (szxga08-in.huawei.com [45.249.212.255]) (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 A18D219C55C; Mon, 2 Sep 2024 12:09:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.255 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725278978; cv=none; b=Qhg/vNQ8p4ml2Uf8v/hGdwxN6RMgpX/+ZDLYbJ+3Q7DHLXgP858amDLHCAKh7wCxope5IyTMBJZpD+o/ZqBR1YLRj31ulKasHI0fp0ed2rFBC+gBBlDrS5mkxbo+Zf07zp5KniR56A0VG6jnEbBpwTs4CJOSPCmkmtviPu0snHo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725278978; c=relaxed/simple; bh=dB95PeXUyd1jyCl7LaHZFprzkHHgyNfqaMxqaXhbGHI=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=gfkXwwFRbZIxhw14uptV9HYAKgCQpZv9FfqLFLI3rximo+H5caxuTbazIVX1iCj4DOa+4uYxcKSU2ijgAXOhYaQyM2oG4jT/pB6RngK7d3gxN6LeNKiW16w0SqELRnpJ3JGpDl/NgmJ/holFoe5cO6KIis+gzZ5adNu21hSeIq8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com; spf=pass smtp.mailfrom=huawei.com; arc=none smtp.client-ip=45.249.212.255 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huawei.com Received: from mail.maildlp.com (unknown [172.19.163.48]) by szxga08-in.huawei.com (SkyGuard) with ESMTP id 4Wy6wj3d4Pz18Myh; Mon, 2 Sep 2024 20:08:37 +0800 (CST) Received: from dggpemf200006.china.huawei.com (unknown [7.185.36.61]) by mail.maildlp.com (Postfix) with ESMTPS id 53FC418007C; Mon, 2 Sep 2024 20:09:32 +0800 (CST) Received: from localhost.localdomain (10.90.30.45) by dggpemf200006.china.huawei.com (7.185.36.61) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.11; Mon, 2 Sep 2024 20:09:31 +0800 From: Yunsheng Lin To: , , CC: , , Yunsheng Lin , Alexander Duyck , Ayush Sawal , Eric Dumazet , Willem de Bruijn , Jason Wang , Ingo Molnar , Peter Zijlstra , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Valentin Schneider , John Fastabend , Jakub Sitnicki , David Ahern , Matthieu Baerts , Mat Martineau , Geliang Tang , Jamal Hadi Salim , Cong Wang , Jiri Pirko , Boris Pismenny , , Subject: [PATCH net-next v17 12/14] net: replace page_frag with page_frag_cache Date: Mon, 2 Sep 2024 20:03:11 +0800 Message-ID: <20240902120314.508180-13-linyunsheng@huawei.com> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20240902120314.508180-1-linyunsheng@huawei.com> References: <20240902120314.508180-1-linyunsheng@huawei.com> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: dggems704-chm.china.huawei.com (10.3.19.181) To dggpemf200006.china.huawei.com (7.185.36.61) X-Patchwork-Delegate: kuba@kernel.org Use the newly introduced prepare/probe/commit API to replace page_frag with page_frag_cache for sk_page_frag(). CC: Alexander Duyck Signed-off-by: Yunsheng Lin --- .../chelsio/inline_crypto/chtls/chtls.h | 3 - .../chelsio/inline_crypto/chtls/chtls_io.c | 101 +++++------------- .../chelsio/inline_crypto/chtls/chtls_main.c | 3 - drivers/net/tun.c | 47 ++++---- include/linux/sched.h | 2 +- include/net/sock.h | 21 ++-- kernel/exit.c | 3 +- kernel/fork.c | 3 +- net/core/skbuff.c | 58 +++++----- net/core/skmsg.c | 12 ++- net/core/sock.c | 32 ++++-- net/ipv4/ip_output.c | 28 +++-- net/ipv4/tcp.c | 23 ++-- net/ipv4/tcp_output.c | 25 +++-- net/ipv6/ip6_output.c | 28 +++-- net/kcm/kcmsock.c | 18 ++-- net/mptcp/protocol.c | 47 ++++---- net/sched/em_meta.c | 2 +- net/tls/tls_device.c | 100 ++++++++++------- 19 files changed, 294 insertions(+), 262 deletions(-) diff --git a/drivers/net/ethernet/chelsio/inline_crypto/chtls/chtls.h b/drivers/net/ethernet/chelsio/inline_crypto/chtls/chtls.h index 7ff82b6778ba..fe2b6a8ef718 100644 --- a/drivers/net/ethernet/chelsio/inline_crypto/chtls/chtls.h +++ b/drivers/net/ethernet/chelsio/inline_crypto/chtls/chtls.h @@ -234,7 +234,6 @@ struct chtls_dev { struct list_head list_node; struct list_head rcu_node; struct list_head na_node; - unsigned int send_page_order; int max_host_sndbuf; u32 round_robin_cnt; struct key_map kmap; @@ -453,8 +452,6 @@ enum { /* The ULP mode/submode of an skbuff */ #define skb_ulp_mode(skb) (ULP_SKB_CB(skb)->ulp_mode) -#define TCP_PAGE(sk) (sk->sk_frag.page) -#define TCP_OFF(sk) (sk->sk_frag.offset) static inline struct chtls_dev *to_chtls_dev(struct tls_toe_device *tlsdev) { diff --git a/drivers/net/ethernet/chelsio/inline_crypto/chtls/chtls_io.c b/drivers/net/ethernet/chelsio/inline_crypto/chtls/chtls_io.c index d567e42e1760..48a61b1142a3 100644 --- a/drivers/net/ethernet/chelsio/inline_crypto/chtls/chtls_io.c +++ b/drivers/net/ethernet/chelsio/inline_crypto/chtls/chtls_io.c @@ -825,12 +825,6 @@ void skb_entail(struct sock *sk, struct sk_buff *skb, int flags) ULP_SKB_CB(skb)->flags = flags; __skb_queue_tail(&csk->txq, skb); sk->sk_wmem_queued += skb->truesize; - - if (TCP_PAGE(sk) && TCP_OFF(sk)) { - put_page(TCP_PAGE(sk)); - TCP_PAGE(sk) = NULL; - TCP_OFF(sk) = 0; - } } static struct sk_buff *get_tx_skb(struct sock *sk, int size) @@ -882,16 +876,12 @@ static void push_frames_if_head(struct sock *sk) chtls_push_frames(csk, 1); } -static int chtls_skb_copy_to_page_nocache(struct sock *sk, - struct iov_iter *from, - struct sk_buff *skb, - struct page *page, - int off, int copy) +static int chtls_skb_copy_to_va_nocache(struct sock *sk, struct iov_iter *from, + struct sk_buff *skb, char *va, int copy) { int err; - err = skb_do_copy_data_nocache(sk, skb, from, page_address(page) + - off, copy, skb->len); + err = skb_do_copy_data_nocache(sk, skb, from, va, copy, skb->len); if (err) return err; @@ -1114,82 +1104,45 @@ int chtls_sendmsg(struct sock *sk, struct msghdr *msg, size_t size) if (err) goto do_fault; } else { + struct page_frag_cache *nc = &sk->sk_frag; + struct page_frag page_frag, *pfrag; int i = skb_shinfo(skb)->nr_frags; - struct page *page = TCP_PAGE(sk); - int pg_size = PAGE_SIZE; - int off = TCP_OFF(sk); - bool merge; - - if (page) - pg_size = page_size(page); - if (off < pg_size && - skb_can_coalesce(skb, i, page, off)) { + bool merge = false; + void *va; + + pfrag = &page_frag; + va = page_frag_alloc_refill_prepare(nc, 32U, pfrag, + sk->sk_allocation); + if (unlikely(!va)) + goto wait_for_memory; + + if (skb_can_coalesce(skb, i, pfrag->page, + pfrag->offset)) merge = true; - goto copy; - } - merge = false; - if (i == (is_tls_tx(csk) ? (MAX_SKB_FRAGS - 1) : - MAX_SKB_FRAGS)) + else if (i == (is_tls_tx(csk) ? (MAX_SKB_FRAGS - 1) : + MAX_SKB_FRAGS)) goto new_buf; - if (page && off == pg_size) { - put_page(page); - TCP_PAGE(sk) = page = NULL; - pg_size = PAGE_SIZE; - } - - if (!page) { - gfp_t gfp = sk->sk_allocation; - int order = cdev->send_page_order; - - if (order) { - page = alloc_pages(gfp | __GFP_COMP | - __GFP_NOWARN | - __GFP_NORETRY, - order); - if (page) - pg_size <<= order; - } - if (!page) { - page = alloc_page(gfp); - pg_size = PAGE_SIZE; - } - if (!page) - goto wait_for_memory; - off = 0; - } -copy: - if (copy > pg_size - off) - copy = pg_size - off; + copy = min_t(int, copy, pfrag->size); if (is_tls_tx(csk)) copy = min_t(int, copy, csk->tlshws.txleft); - err = chtls_skb_copy_to_page_nocache(sk, &msg->msg_iter, - skb, page, - off, copy); - if (unlikely(err)) { - if (!TCP_PAGE(sk)) { - TCP_PAGE(sk) = page; - TCP_OFF(sk) = 0; - } + err = chtls_skb_copy_to_va_nocache(sk, &msg->msg_iter, + skb, va, copy); + if (unlikely(err)) goto do_fault; - } + /* Update the skb. */ if (merge) { skb_frag_size_add( &skb_shinfo(skb)->frags[i - 1], copy); + page_frag_commit_noref(nc, pfrag, copy); } else { - skb_fill_page_desc(skb, i, page, off, copy); - if (off + copy < pg_size) { - /* space left keep page */ - get_page(page); - TCP_PAGE(sk) = page; - } else { - TCP_PAGE(sk) = NULL; - } + skb_fill_page_desc(skb, i, pfrag->page, + pfrag->offset, copy); + page_frag_commit(nc, pfrag, copy); } - TCP_OFF(sk) = off + copy; } if (unlikely(skb->len == mss)) tx_skb_finalize(skb); diff --git a/drivers/net/ethernet/chelsio/inline_crypto/chtls/chtls_main.c b/drivers/net/ethernet/chelsio/inline_crypto/chtls/chtls_main.c index 455a54708be4..ba88b2fc7cd8 100644 --- a/drivers/net/ethernet/chelsio/inline_crypto/chtls/chtls_main.c +++ b/drivers/net/ethernet/chelsio/inline_crypto/chtls/chtls_main.c @@ -34,7 +34,6 @@ static DEFINE_MUTEX(notify_mutex); static RAW_NOTIFIER_HEAD(listen_notify_list); static struct proto chtls_cpl_prot, chtls_cpl_protv6; struct request_sock_ops chtls_rsk_ops, chtls_rsk_opsv6; -static uint send_page_order = (14 - PAGE_SHIFT < 0) ? 0 : 14 - PAGE_SHIFT; static void register_listen_notifier(struct notifier_block *nb) { @@ -273,8 +272,6 @@ static void *chtls_uld_add(const struct cxgb4_lld_info *info) INIT_WORK(&cdev->deferq_task, process_deferq); spin_lock_init(&cdev->listen_lock); spin_lock_init(&cdev->idr_lock); - cdev->send_page_order = min_t(uint, get_order(32768), - send_page_order); cdev->max_host_sndbuf = 48 * 1024; if (lldi->vr->key.size) diff --git a/drivers/net/tun.c b/drivers/net/tun.c index 1d06c560c5e6..af7befe3969a 100644 --- a/drivers/net/tun.c +++ b/drivers/net/tun.c @@ -1598,21 +1598,19 @@ static bool tun_can_build_skb(struct tun_struct *tun, struct tun_file *tfile, } static struct sk_buff *__tun_build_skb(struct tun_file *tfile, - struct page_frag *alloc_frag, char *buf, - int buflen, int len, int pad) + char *buf, int buflen, int len, int pad) { struct sk_buff *skb = build_skb(buf, buflen); - if (!skb) + if (!skb) { + page_frag_free(buf); return ERR_PTR(-ENOMEM); + } skb_reserve(skb, pad); skb_put(skb, len); skb_set_owner_w(skb, tfile->socket.sk); - get_page(alloc_frag->page); - alloc_frag->offset += buflen; - return skb; } @@ -1660,8 +1658,8 @@ static struct sk_buff *tun_build_skb(struct tun_struct *tun, struct virtio_net_hdr *hdr, int len, int *skb_xdp) { - struct page_frag *alloc_frag = ¤t->task_frag; struct bpf_net_context __bpf_net_ctx, *bpf_net_ctx; + struct page_frag_cache *nc = ¤t->task_frag; struct bpf_prog *xdp_prog; int buflen = SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); char *buf; @@ -1676,16 +1674,16 @@ static struct sk_buff *tun_build_skb(struct tun_struct *tun, buflen += SKB_DATA_ALIGN(len + pad); rcu_read_unlock(); - alloc_frag->offset = ALIGN((u64)alloc_frag->offset, SMP_CACHE_BYTES); - if (unlikely(!skb_page_frag_refill(buflen, alloc_frag, GFP_KERNEL))) + buf = page_frag_alloc_align(nc, buflen, GFP_KERNEL, + SMP_CACHE_BYTES); + if (unlikely(!buf)) return ERR_PTR(-ENOMEM); - buf = (char *)page_address(alloc_frag->page) + alloc_frag->offset; - copied = copy_page_from_iter(alloc_frag->page, - alloc_frag->offset + pad, - len, from); - if (copied != len) + copied = copy_from_iter(buf + pad, len, from); + if (copied != len) { + page_frag_alloc_abort(nc, buflen); return ERR_PTR(-EFAULT); + } /* There's a small window that XDP may be set after the check * of xdp_prog above, this should be rare and for simplicity @@ -1693,8 +1691,7 @@ static struct sk_buff *tun_build_skb(struct tun_struct *tun, */ if (hdr->gso_type || !xdp_prog) { *skb_xdp = 1; - return __tun_build_skb(tfile, alloc_frag, buf, buflen, len, - pad); + return __tun_build_skb(tfile, buf, buflen, len, pad); } *skb_xdp = 0; @@ -1711,21 +1708,23 @@ static struct sk_buff *tun_build_skb(struct tun_struct *tun, xdp_prepare_buff(&xdp, buf, pad, len, false); act = bpf_prog_run_xdp(xdp_prog, &xdp); - if (act == XDP_REDIRECT || act == XDP_TX) { - get_page(alloc_frag->page); - alloc_frag->offset += buflen; - } err = tun_xdp_act(tun, xdp_prog, &xdp, act); if (err < 0) { - if (act == XDP_REDIRECT || act == XDP_TX) - put_page(alloc_frag->page); + if (act == XDP_REDIRECT || act == XDP_TX) { + page_frag_alloc_abort(nc, 0); + goto out; + } + + page_frag_alloc_abort(nc, buflen); goto out; } if (err == XDP_REDIRECT) xdp_do_flush(); - if (err != XDP_PASS) + if (err != XDP_PASS) { + page_frag_alloc_abort(nc, buflen); goto out; + } pad = xdp.data - xdp.data_hard_start; len = xdp.data_end - xdp.data; @@ -1734,7 +1733,7 @@ static struct sk_buff *tun_build_skb(struct tun_struct *tun, rcu_read_unlock(); local_bh_enable(); - return __tun_build_skb(tfile, alloc_frag, buf, buflen, len, pad); + return __tun_build_skb(tfile, buf, buflen, len, pad); out: bpf_net_ctx_clear(bpf_net_ctx); diff --git a/include/linux/sched.h b/include/linux/sched.h index f8d150343d42..bb9a8e9d6d2d 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -1355,7 +1355,7 @@ struct task_struct { /* Cache last used pipe for splice(): */ struct pipe_inode_info *splice_pipe; - struct page_frag task_frag; + struct page_frag_cache task_frag; #ifdef CONFIG_TASK_DELAY_ACCT struct task_delay_info *delays; diff --git a/include/net/sock.h b/include/net/sock.h index 5adcc77de422..3d505d3f744e 100644 --- a/include/net/sock.h +++ b/include/net/sock.h @@ -303,7 +303,7 @@ struct sk_filter; * @sk_stamp: time stamp of last packet received * @sk_stamp_seq: lock for accessing sk_stamp on 32 bit architectures only * @sk_tsflags: SO_TIMESTAMPING flags - * @sk_use_task_frag: allow sk_page_frag() to use current->task_frag. + * @sk_use_task_frag: allow sk_page_frag_cache() to use current->task_frag. * Sockets that can be used under memory reclaim should * set this to false. * @sk_bind_phc: SO_TIMESTAMPING bind PHC index of PTP virtual clock @@ -461,7 +461,7 @@ struct sock { struct sk_buff_head sk_write_queue; u32 sk_dst_pending_confirm; u32 sk_pacing_status; /* see enum sk_pacing */ - struct page_frag sk_frag; + struct page_frag_cache sk_frag; struct timer_list sk_timer; unsigned long sk_pacing_rate; /* bytes per second */ @@ -2470,22 +2470,22 @@ static inline void sk_stream_moderate_sndbuf(struct sock *sk) } /** - * sk_page_frag - return an appropriate page_frag + * sk_page_frag_cache - return an appropriate page_frag_cache * @sk: socket * - * Use the per task page_frag instead of the per socket one for + * Use the per task page_frag_cache instead of the per socket one for * optimization when we know that we're in process context and own * everything that's associated with %current. * * Both direct reclaim and page faults can nest inside other - * socket operations and end up recursing into sk_page_frag() - * while it's already in use: explicitly avoid task page_frag + * socket operations and end up recursing into sk_page_frag_cache() + * while it's already in use: explicitly avoid task page_frag_cache * when users disable sk_use_task_frag. * * Return: a per task page_frag if context allows that, * otherwise a per socket one. */ -static inline struct page_frag *sk_page_frag(struct sock *sk) +static inline struct page_frag_cache *sk_page_frag_cache(struct sock *sk) { if (sk->sk_use_task_frag) return ¤t->task_frag; @@ -2493,7 +2493,12 @@ static inline struct page_frag *sk_page_frag(struct sock *sk) return &sk->sk_frag; } -bool sk_page_frag_refill(struct sock *sk, struct page_frag *pfrag); +bool sk_page_frag_refill_prepare(struct sock *sk, struct page_frag_cache *nc, + struct page_frag *pfrag); + +void *sk_page_frag_alloc_refill_prepare(struct sock *sk, + struct page_frag_cache *nc, + struct page_frag *pfrag); /* * Default write policy as shown to user space via poll/select/SIGIO diff --git a/kernel/exit.c b/kernel/exit.c index 7430852a8571..b5257e74ec1c 100644 --- a/kernel/exit.c +++ b/kernel/exit.c @@ -917,8 +917,7 @@ void __noreturn do_exit(long code) if (tsk->splice_pipe) free_pipe_info(tsk->splice_pipe); - if (tsk->task_frag.page) - put_page(tsk->task_frag.page); + page_frag_cache_drain(&tsk->task_frag); exit_task_stack_account(tsk); diff --git a/kernel/fork.c b/kernel/fork.c index cc760491f201..7d380a6fd64a 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -80,6 +80,7 @@ #include #include #include +#include #include #include #include @@ -1157,10 +1158,10 @@ static struct task_struct *dup_task_struct(struct task_struct *orig, int node) tsk->btrace_seq = 0; #endif tsk->splice_pipe = NULL; - tsk->task_frag.page = NULL; tsk->wake_q.next = NULL; tsk->worker_private = NULL; + page_frag_cache_init(&tsk->task_frag); kcov_task_init(tsk); kmsan_task_create(tsk); kmap_local_fork(tsk); diff --git a/net/core/skbuff.c b/net/core/skbuff.c index a5f8e4e0c649..aa735e965d25 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -3040,25 +3040,6 @@ static void sock_spd_release(struct splice_pipe_desc *spd, unsigned int i) put_page(spd->pages[i]); } -static struct page *linear_to_page(struct page *page, unsigned int *len, - unsigned int *offset, - struct sock *sk) -{ - struct page_frag *pfrag = sk_page_frag(sk); - - if (!sk_page_frag_refill(sk, pfrag)) - return NULL; - - *len = min_t(unsigned int, *len, pfrag->size - pfrag->offset); - - memcpy(page_address(pfrag->page) + pfrag->offset, - page_address(page) + *offset, *len); - *offset = pfrag->offset; - pfrag->offset += *len; - - return pfrag->page; -} - static bool spd_can_coalesce(const struct splice_pipe_desc *spd, struct page *page, unsigned int offset) @@ -3069,6 +3050,37 @@ static bool spd_can_coalesce(const struct splice_pipe_desc *spd, spd->partial[spd->nr_pages - 1].len == offset); } +static bool spd_fill_linear_page(struct splice_pipe_desc *spd, + struct page *page, unsigned int offset, + unsigned int *len, struct sock *sk) +{ + struct page_frag_cache *nc = sk_page_frag_cache(sk); + struct page_frag page_frag, *pfrag; + void *va; + + pfrag = &page_frag; + va = sk_page_frag_alloc_refill_prepare(sk, nc, pfrag); + if (!va) + return true; + + *len = min_t(unsigned int, *len, pfrag->size); + memcpy(va, page_address(page) + offset, *len); + + if (spd_can_coalesce(spd, pfrag->page, pfrag->offset)) { + spd->partial[spd->nr_pages - 1].len += *len; + page_frag_commit_noref(nc, pfrag, *len); + return false; + } + + page_frag_commit(nc, pfrag, *len); + spd->pages[spd->nr_pages] = pfrag->page; + spd->partial[spd->nr_pages].len = *len; + spd->partial[spd->nr_pages].offset = pfrag->offset; + spd->nr_pages++; + + return false; +} + /* * Fill page/offset/length into spd, if it can hold more pages. */ @@ -3081,11 +3093,9 @@ static bool spd_fill_page(struct splice_pipe_desc *spd, if (unlikely(spd->nr_pages == MAX_SKB_FRAGS)) return true; - if (linear) { - page = linear_to_page(page, len, &offset, sk); - if (!page) - return true; - } + if (linear) + return spd_fill_linear_page(spd, page, offset, len, sk); + if (spd_can_coalesce(spd, page, offset)) { spd->partial[spd->nr_pages - 1].len += *len; return false; diff --git a/net/core/skmsg.c b/net/core/skmsg.c index bbf40b999713..e3cd21d5a31f 100644 --- a/net/core/skmsg.c +++ b/net/core/skmsg.c @@ -27,23 +27,25 @@ static bool sk_msg_try_coalesce_ok(struct sk_msg *msg, int elem_first_coalesce) int sk_msg_alloc(struct sock *sk, struct sk_msg *msg, int len, int elem_first_coalesce) { - struct page_frag *pfrag = sk_page_frag(sk); + struct page_frag_cache *nc = sk_page_frag_cache(sk); u32 osize = msg->sg.size; int ret = 0; len -= msg->sg.size; while (len > 0) { + struct page_frag page_frag, *pfrag; struct scatterlist *sge; u32 orig_offset; int use, i; - if (!sk_page_frag_refill(sk, pfrag)) { + pfrag = &page_frag; + if (!sk_page_frag_refill_prepare(sk, nc, pfrag)) { ret = -ENOMEM; goto msg_trim; } orig_offset = pfrag->offset; - use = min_t(int, len, pfrag->size - orig_offset); + use = min_t(int, len, pfrag->size); if (!sk_wmem_schedule(sk, use)) { ret = -ENOMEM; goto msg_trim; @@ -57,6 +59,7 @@ int sk_msg_alloc(struct sock *sk, struct sk_msg *msg, int len, sg_page(sge) == pfrag->page && sge->offset + sge->length == orig_offset) { sge->length += use; + page_frag_commit_noref(nc, pfrag, use); } else { if (sk_msg_full(msg)) { ret = -ENOSPC; @@ -66,13 +69,12 @@ int sk_msg_alloc(struct sock *sk, struct sk_msg *msg, int len, sge = &msg->sg.data[msg->sg.end]; sg_unmark_end(sge); sg_set_page(sge, pfrag->page, use, orig_offset); - get_page(pfrag->page); + page_frag_commit(nc, pfrag, use); sk_msg_iter_next(msg, end); } sk_mem_charge(sk, use); msg->sg.size += use; - pfrag->offset += use; len -= use; } diff --git a/net/core/sock.c b/net/core/sock.c index 468b1239606c..8db879d0ef3b 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -2207,10 +2207,7 @@ static void __sk_destruct(struct rcu_head *head) pr_debug("%s: optmem leakage (%d bytes) detected\n", __func__, atomic_read(&sk->sk_omem_alloc)); - if (sk->sk_frag.page) { - put_page(sk->sk_frag.page); - sk->sk_frag.page = NULL; - } + page_frag_cache_drain(&sk->sk_frag); /* We do not need to acquire sk->sk_peer_lock, we are the last user. */ put_cred(sk->sk_peer_cred); @@ -2956,16 +2953,33 @@ bool skb_page_frag_refill(unsigned int sz, struct page_frag *pfrag, gfp_t gfp) } EXPORT_SYMBOL(skb_page_frag_refill); -bool sk_page_frag_refill(struct sock *sk, struct page_frag *pfrag) +bool sk_page_frag_refill_prepare(struct sock *sk, struct page_frag_cache *nc, + struct page_frag *pfrag) { - if (likely(skb_page_frag_refill(32U, pfrag, sk->sk_allocation))) + if (likely(page_frag_refill_prepare(nc, 32U, pfrag, sk->sk_allocation))) return true; sk_enter_memory_pressure(sk); sk_stream_moderate_sndbuf(sk); return false; } -EXPORT_SYMBOL(sk_page_frag_refill); +EXPORT_SYMBOL(sk_page_frag_refill_prepare); + +void *sk_page_frag_alloc_refill_prepare(struct sock *sk, + struct page_frag_cache *nc, + struct page_frag *pfrag) +{ + void *va; + + va = page_frag_alloc_refill_prepare(nc, 32U, pfrag, sk->sk_allocation); + if (likely(va)) + return va; + + sk_enter_memory_pressure(sk); + sk_stream_moderate_sndbuf(sk); + return NULL; +} +EXPORT_SYMBOL(sk_page_frag_alloc_refill_prepare); void __lock_sock(struct sock *sk) __releases(&sk->sk_lock.slock) @@ -3487,8 +3501,8 @@ void sock_init_data_uid(struct socket *sock, struct sock *sk, kuid_t uid) sk->sk_error_report = sock_def_error_report; sk->sk_destruct = sock_def_destruct; - sk->sk_frag.page = NULL; - sk->sk_frag.offset = 0; + page_frag_cache_init(&sk->sk_frag); + sk->sk_peek_off = -1; sk->sk_peer_pid = NULL; diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c index eea443b7f65e..85869057b0f1 100644 --- a/net/ipv4/ip_output.c +++ b/net/ipv4/ip_output.c @@ -953,7 +953,7 @@ static int __ip_append_data(struct sock *sk, struct flowi4 *fl4, struct sk_buff_head *queue, struct inet_cork *cork, - struct page_frag *pfrag, + struct page_frag_cache *nc, int getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb), void *from, int length, int transhdrlen, @@ -1228,13 +1228,19 @@ static int __ip_append_data(struct sock *sk, copy = err; wmem_alloc_delta += copy; } else if (!zc) { + struct page_frag page_frag, *pfrag; int i = skb_shinfo(skb)->nr_frags; + void *va; err = -ENOMEM; - if (!sk_page_frag_refill(sk, pfrag)) + pfrag = &page_frag; + va = sk_page_frag_alloc_refill_prepare(sk, nc, pfrag); + if (!va) goto error; skb_zcopy_downgrade_managed(skb); + copy = min_t(int, copy, pfrag->size); + if (!skb_can_coalesce(skb, i, pfrag->page, pfrag->offset)) { err = -EMSGSIZE; @@ -1242,18 +1248,18 @@ static int __ip_append_data(struct sock *sk, goto error; __skb_fill_page_desc(skb, i, pfrag->page, - pfrag->offset, 0); + pfrag->offset, copy); skb_shinfo(skb)->nr_frags = ++i; - get_page(pfrag->page); + page_frag_commit(nc, pfrag, copy); + } else { + skb_frag_size_add(&skb_shinfo(skb)->frags[i - 1], + copy); + page_frag_commit_noref(nc, pfrag, copy); } - copy = min_t(int, copy, pfrag->size - pfrag->offset); - if (getfrag(from, - page_address(pfrag->page) + pfrag->offset, - offset, copy, skb->len, skb) < 0) + + if (getfrag(from, va, offset, copy, skb->len, skb) < 0) goto error_efault; - pfrag->offset += copy; - skb_frag_size_add(&skb_shinfo(skb)->frags[i - 1], copy); skb_len_add(skb, copy); wmem_alloc_delta += copy; } else { @@ -1364,7 +1370,7 @@ int ip_append_data(struct sock *sk, struct flowi4 *fl4, } return __ip_append_data(sk, fl4, &sk->sk_write_queue, &inet->cork.base, - sk_page_frag(sk), getfrag, + sk_page_frag_cache(sk), getfrag, from, length, transhdrlen, flags); } diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index 8bf8ce656b0a..f1a738ebf808 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -1189,9 +1189,13 @@ int tcp_sendmsg_locked(struct sock *sk, struct msghdr *msg, size_t size) if (zc == 0) { bool merge = true; int i = skb_shinfo(skb)->nr_frags; - struct page_frag *pfrag = sk_page_frag(sk); + struct page_frag_cache *nc = sk_page_frag_cache(sk); + struct page_frag page_frag, *pfrag; + void *va; - if (!sk_page_frag_refill(sk, pfrag)) + pfrag = &page_frag; + va = sk_page_frag_alloc_refill_prepare(sk, nc, pfrag); + if (!va) goto wait_for_space; if (!skb_can_coalesce(skb, i, pfrag->page, @@ -1203,7 +1207,7 @@ int tcp_sendmsg_locked(struct sock *sk, struct msghdr *msg, size_t size) merge = false; } - copy = min_t(int, copy, pfrag->size - pfrag->offset); + copy = min_t(int, copy, pfrag->size); if (unlikely(skb_zcopy_pure(skb) || skb_zcopy_managed(skb))) { if (tcp_downgrade_zcopy_pure(sk, skb)) @@ -1216,20 +1220,19 @@ int tcp_sendmsg_locked(struct sock *sk, struct msghdr *msg, size_t size) goto wait_for_space; err = skb_copy_to_va_nocache(sk, &msg->msg_iter, skb, - page_address(pfrag->page) + - pfrag->offset, copy); + va, copy); if (err) goto do_error; /* Update the skb. */ if (merge) { skb_frag_size_add(&skb_shinfo(skb)->frags[i - 1], copy); + page_frag_commit_noref(nc, pfrag, copy); } else { skb_fill_page_desc(skb, i, pfrag->page, pfrag->offset, copy); - page_ref_inc(pfrag->page); + page_frag_commit(nc, pfrag, copy); } - pfrag->offset += copy; } else if (zc == MSG_ZEROCOPY) { /* First append to a fragless skb builds initial * pure zerocopy skb @@ -3134,11 +3137,7 @@ int tcp_disconnect(struct sock *sk, int flags) WARN_ON(inet->inet_num && !icsk->icsk_bind_hash); - if (sk->sk_frag.page) { - put_page(sk->sk_frag.page); - sk->sk_frag.page = NULL; - sk->sk_frag.offset = 0; - } + page_frag_cache_drain(&sk->sk_frag); sk_error_report(sk); return 0; } diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c index cdd0def14427..75add1c4f57c 100644 --- a/net/ipv4/tcp_output.c +++ b/net/ipv4/tcp_output.c @@ -3970,9 +3970,11 @@ static int tcp_send_syn_data(struct sock *sk, struct sk_buff *syn) struct inet_connection_sock *icsk = inet_csk(sk); struct tcp_sock *tp = tcp_sk(sk); struct tcp_fastopen_request *fo = tp->fastopen_req; - struct page_frag *pfrag = sk_page_frag(sk); + struct page_frag_cache *nc = sk_page_frag_cache(sk); + struct page_frag page_frag, *pfrag; struct sk_buff *syn_data; int space, err = 0; + void *va; tp->rx_opt.mss_clamp = tp->advmss; /* If MSS is not cached */ if (!tcp_fastopen_cookie_check(sk, &tp->rx_opt.mss_clamp, &fo->cookie)) @@ -3991,21 +3993,25 @@ static int tcp_send_syn_data(struct sock *sk, struct sk_buff *syn) space = min_t(size_t, space, fo->size); - if (space && - !skb_page_frag_refill(min_t(size_t, space, PAGE_SIZE), - pfrag, sk->sk_allocation)) - goto fallback; + if (space) { + pfrag = &page_frag; + va = page_frag_alloc_refill_prepare(nc, + min_t(size_t, space, PAGE_SIZE), + pfrag, sk->sk_allocation); + if (!va) + goto fallback; + } + syn_data = tcp_stream_alloc_skb(sk, sk->sk_allocation, false); if (!syn_data) goto fallback; memcpy(syn_data->cb, syn->cb, sizeof(syn->cb)); if (space) { - space = min_t(size_t, space, pfrag->size - pfrag->offset); + space = min_t(size_t, space, pfrag->size); space = tcp_wmem_schedule(sk, space); } if (space) { - space = copy_page_from_iter(pfrag->page, pfrag->offset, - space, &fo->data->msg_iter); + space = _copy_from_iter(va, space, &fo->data->msg_iter); if (unlikely(!space)) { tcp_skb_tsorted_anchor_cleanup(syn_data); kfree_skb(syn_data); @@ -4013,8 +4019,7 @@ static int tcp_send_syn_data(struct sock *sk, struct sk_buff *syn) } skb_fill_page_desc(syn_data, 0, pfrag->page, pfrag->offset, space); - page_ref_inc(pfrag->page); - pfrag->offset += space; + page_frag_commit(nc, pfrag, space); skb_len_add(syn_data, space); skb_zcopy_set(syn_data, fo->uarg, NULL); } diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c index f26841f1490f..d30c59746b0f 100644 --- a/net/ipv6/ip6_output.c +++ b/net/ipv6/ip6_output.c @@ -1413,7 +1413,7 @@ static int __ip6_append_data(struct sock *sk, struct sk_buff_head *queue, struct inet_cork_full *cork_full, struct inet6_cork *v6_cork, - struct page_frag *pfrag, + struct page_frag_cache *nc, int getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb), void *from, size_t length, int transhdrlen, @@ -1754,13 +1754,19 @@ static int __ip6_append_data(struct sock *sk, copy = err; wmem_alloc_delta += copy; } else if (!zc) { + struct page_frag page_frag, *pfrag; int i = skb_shinfo(skb)->nr_frags; + void *va; err = -ENOMEM; - if (!sk_page_frag_refill(sk, pfrag)) + pfrag = &page_frag; + va = sk_page_frag_alloc_refill_prepare(sk, nc, pfrag); + if (!va) goto error; skb_zcopy_downgrade_managed(skb); + copy = min_t(int, copy, pfrag->size); + if (!skb_can_coalesce(skb, i, pfrag->page, pfrag->offset)) { err = -EMSGSIZE; @@ -1768,18 +1774,18 @@ static int __ip6_append_data(struct sock *sk, goto error; __skb_fill_page_desc(skb, i, pfrag->page, - pfrag->offset, 0); + pfrag->offset, copy); skb_shinfo(skb)->nr_frags = ++i; - get_page(pfrag->page); + page_frag_commit(nc, pfrag, copy); + } else { + skb_frag_size_add(&skb_shinfo(skb)->frags[i - 1], + copy); + page_frag_commit_noref(nc, pfrag, copy); } - copy = min_t(int, copy, pfrag->size - pfrag->offset); - if (getfrag(from, - page_address(pfrag->page) + pfrag->offset, - offset, copy, skb->len, skb) < 0) + + if (getfrag(from, va, offset, copy, skb->len, skb) < 0) goto error_efault; - pfrag->offset += copy; - skb_frag_size_add(&skb_shinfo(skb)->frags[i - 1], copy); skb->len += copy; skb->data_len += copy; skb->truesize += copy; @@ -1842,7 +1848,7 @@ int ip6_append_data(struct sock *sk, } return __ip6_append_data(sk, &sk->sk_write_queue, &inet->cork, - &np->cork, sk_page_frag(sk), getfrag, + &np->cork, sk_page_frag_cache(sk), getfrag, from, length, transhdrlen, flags, ipc6); } EXPORT_SYMBOL_GPL(ip6_append_data); diff --git a/net/kcm/kcmsock.c b/net/kcm/kcmsock.c index f4462cf88ed5..ab6ab1d102b2 100644 --- a/net/kcm/kcmsock.c +++ b/net/kcm/kcmsock.c @@ -804,9 +804,13 @@ static int kcm_sendmsg(struct socket *sock, struct msghdr *msg, size_t len) while (msg_data_left(msg)) { bool merge = true; int i = skb_shinfo(skb)->nr_frags; - struct page_frag *pfrag = sk_page_frag(sk); + struct page_frag_cache *nc = sk_page_frag_cache(sk); + struct page_frag page_frag, *pfrag; + void *va; - if (!sk_page_frag_refill(sk, pfrag)) + pfrag = &page_frag; + va = sk_page_frag_alloc_refill_prepare(sk, nc, pfrag); + if (!va) goto wait_for_memory; if (!skb_can_coalesce(skb, i, pfrag->page, @@ -851,14 +855,12 @@ static int kcm_sendmsg(struct socket *sock, struct msghdr *msg, size_t len) if (head != skb) head->truesize += copy; } else { - copy = min_t(int, msg_data_left(msg), - pfrag->size - pfrag->offset); + copy = min_t(int, msg_data_left(msg), pfrag->size); if (!sk_wmem_schedule(sk, copy)) goto wait_for_memory; err = skb_copy_to_va_nocache(sk, &msg->msg_iter, skb, - page_address(pfrag->page) + - pfrag->offset, copy); + va, copy); if (err) goto out_error; @@ -866,13 +868,13 @@ static int kcm_sendmsg(struct socket *sock, struct msghdr *msg, size_t len) if (merge) { skb_frag_size_add( &skb_shinfo(skb)->frags[i - 1], copy); + page_frag_commit_noref(nc, pfrag, copy); } else { skb_fill_page_desc(skb, i, pfrag->page, pfrag->offset, copy); - get_page(pfrag->page); + page_frag_commit(nc, pfrag, copy); } - pfrag->offset += copy; } copied += copy; diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c index 37ebcb7640eb..5fbddd9de53e 100644 --- a/net/mptcp/protocol.c +++ b/net/mptcp/protocol.c @@ -960,7 +960,6 @@ static bool mptcp_skb_can_collapse_to(u64 write_seq, } /* we can append data to the given data frag if: - * - there is space available in the backing page_frag * - the data frag tail matches the current page_frag free offset * - the data frag end sequence number matches the current write seq */ @@ -969,7 +968,6 @@ static bool mptcp_frag_can_collapse_to(const struct mptcp_sock *msk, const struct mptcp_data_frag *df) { return df && pfrag->page == df->page && - pfrag->size - pfrag->offset > 0 && pfrag->offset == (df->offset + df->data_len) && df->data_seq + df->data_len == msk->write_seq; } @@ -1085,14 +1083,20 @@ static void mptcp_enter_memory_pressure(struct sock *sk) /* ensure we get enough memory for the frag hdr, beyond some minimal amount of * data */ -static bool mptcp_page_frag_refill(struct sock *sk, struct page_frag *pfrag) +static void *mptcp_page_frag_alloc_refill_prepare(struct sock *sk, + struct page_frag_cache *nc, + struct page_frag *pfrag) { - if (likely(skb_page_frag_refill(32U + sizeof(struct mptcp_data_frag), - pfrag, sk->sk_allocation))) - return true; + unsigned int fragsz = 32U + sizeof(struct mptcp_data_frag); + void *va; + + va = page_frag_alloc_refill_prepare(nc, fragsz, pfrag, + sk->sk_allocation); + if (likely(va)) + return va; mptcp_enter_memory_pressure(sk); - return false; + return NULL; } static struct mptcp_data_frag * @@ -1795,7 +1799,7 @@ static u32 mptcp_send_limit(const struct sock *sk) static int mptcp_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) { struct mptcp_sock *msk = mptcp_sk(sk); - struct page_frag *pfrag; + struct page_frag_cache *nc; size_t copied = 0; int ret = 0; long timeo; @@ -1829,14 +1833,16 @@ static int mptcp_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) if (unlikely(sk->sk_err || (sk->sk_shutdown & SEND_SHUTDOWN))) goto do_error; - pfrag = sk_page_frag(sk); + nc = sk_page_frag_cache(sk); while (msg_data_left(msg)) { + struct page_frag page_frag, *pfrag; int total_ts, frag_truesize = 0; struct mptcp_data_frag *dfrag; bool dfrag_collapsed; - size_t psize, offset; u32 copy_limit; + size_t psize; + void *va; /* ensure fitting the notsent_lowat() constraint */ copy_limit = mptcp_send_limit(sk); @@ -1847,21 +1853,26 @@ static int mptcp_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) * page allocator */ dfrag = mptcp_pending_tail(sk); - dfrag_collapsed = mptcp_frag_can_collapse_to(msk, pfrag, dfrag); + pfrag = &page_frag; + va = page_frag_alloc_refill_probe(nc, 1, pfrag); + dfrag_collapsed = va && mptcp_frag_can_collapse_to(msk, pfrag, + dfrag); if (!dfrag_collapsed) { - if (!mptcp_page_frag_refill(sk, pfrag)) + va = mptcp_page_frag_alloc_refill_prepare(sk, nc, + pfrag); + if (!va) goto wait_for_memory; dfrag = mptcp_carve_data_frag(msk, pfrag, pfrag->offset); frag_truesize = dfrag->overhead; + va += dfrag->overhead; } /* we do not bound vs wspace, to allow a single packet. * memory accounting will prevent execessive memory usage * anyway */ - offset = dfrag->offset + dfrag->data_len; - psize = pfrag->size - offset; + psize = pfrag->size - frag_truesize; psize = min_t(size_t, psize, msg_data_left(msg)); psize = min_t(size_t, psize, copy_limit); total_ts = psize + frag_truesize; @@ -1869,8 +1880,7 @@ static int mptcp_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) if (!sk_wmem_schedule(sk, total_ts)) goto wait_for_memory; - ret = do_copy_data_nocache(sk, psize, &msg->msg_iter, - page_address(dfrag->page) + offset); + ret = do_copy_data_nocache(sk, psize, &msg->msg_iter, va); if (ret) goto do_error; @@ -1879,7 +1889,6 @@ static int mptcp_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) copied += psize; dfrag->data_len += psize; frag_truesize += psize; - pfrag->offset += frag_truesize; WRITE_ONCE(msk->write_seq, msk->write_seq + psize); /* charge data on mptcp pending queue to the msk socket @@ -1887,10 +1896,12 @@ static int mptcp_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) */ sk_wmem_queued_add(sk, frag_truesize); if (!dfrag_collapsed) { - get_page(dfrag->page); + page_frag_commit(nc, pfrag, frag_truesize); list_add_tail(&dfrag->list, &msk->rtx_queue); if (!msk->first_pending) WRITE_ONCE(msk->first_pending, dfrag); + } else { + page_frag_commit_noref(nc, pfrag, frag_truesize); } pr_debug("msk=%p dfrag at seq=%llu len=%u sent=%u new=%d\n", msk, dfrag->data_seq, dfrag->data_len, dfrag->already_sent, diff --git a/net/sched/em_meta.c b/net/sched/em_meta.c index 8996c73c9779..4da465af972f 100644 --- a/net/sched/em_meta.c +++ b/net/sched/em_meta.c @@ -590,7 +590,7 @@ META_COLLECTOR(int_sk_sendmsg_off) *err = -1; return; } - dst->value = sk->sk_frag.offset; + dst->value = page_frag_cache_page_offset(&sk->sk_frag); } META_COLLECTOR(int_sk_write_pend) diff --git a/net/tls/tls_device.c b/net/tls/tls_device.c index dc063c2c7950..0ea2cee5dffe 100644 --- a/net/tls/tls_device.c +++ b/net/tls/tls_device.c @@ -253,8 +253,8 @@ static void tls_device_resync_tx(struct sock *sk, struct tls_context *tls_ctx, } static void tls_append_frag(struct tls_record_info *record, - struct page_frag *pfrag, - int size) + struct page_frag_cache *nc, + struct page_frag *pfrag, int size) { skb_frag_t *frag; @@ -262,15 +262,34 @@ static void tls_append_frag(struct tls_record_info *record, if (skb_frag_page(frag) == pfrag->page && skb_frag_off(frag) + skb_frag_size(frag) == pfrag->offset) { skb_frag_size_add(frag, size); + page_frag_commit_noref(nc, pfrag, size); } else { ++frag; skb_frag_fill_page_desc(frag, pfrag->page, pfrag->offset, size); ++record->num_frags; + page_frag_commit(nc, pfrag, size); + } + + record->len += size; +} + +static void tls_append_dummy_frag(struct tls_record_info *record, + struct page_frag *pfrag, int size) +{ + skb_frag_t *frag; + + frag = &record->frags[record->num_frags - 1]; + if (skb_frag_page(frag) == pfrag->page && + skb_frag_off(frag) + skb_frag_size(frag) == pfrag->offset) { + skb_frag_size_add(frag, size); + } else { + ++frag; + skb_frag_fill_page_desc(frag, pfrag->page, pfrag->offset, size); + ++record->num_frags; get_page(pfrag->page); } - pfrag->offset += size; record->len += size; } @@ -311,11 +330,11 @@ static int tls_push_record(struct sock *sk, static void tls_device_record_close(struct sock *sk, struct tls_context *ctx, struct tls_record_info *record, - struct page_frag *pfrag, + struct page_frag_cache *nc, unsigned char record_type) { struct tls_prot_info *prot = &ctx->prot_info; - struct page_frag dummy_tag_frag; + struct page_frag dummy_tag_frag, *pfrag; /* append tag * device will fill in the tag, we just need to append a placeholder @@ -323,13 +342,16 @@ static void tls_device_record_close(struct sock *sk, * increases frag count) * if we can't allocate memory now use the dummy page */ - if (unlikely(pfrag->size - pfrag->offset < prot->tag_size) && - !skb_page_frag_refill(prot->tag_size, pfrag, sk->sk_allocation)) { + pfrag = &dummy_tag_frag; + if (unlikely(!page_frag_refill_probe(nc, prot->tag_size, pfrag) && + !page_frag_refill_prepare(nc, prot->tag_size, pfrag, + sk->sk_allocation))) { dummy_tag_frag.page = dummy_page; dummy_tag_frag.offset = 0; - pfrag = &dummy_tag_frag; + tls_append_dummy_frag(record, pfrag, prot->tag_size); + } else { + tls_append_frag(record, nc, pfrag, prot->tag_size); } - tls_append_frag(record, pfrag, prot->tag_size); /* fill prepend */ tls_fill_prepend(ctx, skb_frag_address(&record->frags[0]), @@ -338,6 +360,7 @@ static void tls_device_record_close(struct sock *sk, } static int tls_create_new_record(struct tls_offload_context_tx *offload_ctx, + struct page_frag_cache *nc, struct page_frag *pfrag, size_t prepend_size) { @@ -352,8 +375,7 @@ static int tls_create_new_record(struct tls_offload_context_tx *offload_ctx, skb_frag_fill_page_desc(frag, pfrag->page, pfrag->offset, prepend_size); - get_page(pfrag->page); - pfrag->offset += prepend_size; + page_frag_commit(nc, pfrag, prepend_size); record->num_frags = 1; record->len = prepend_size; @@ -361,33 +383,34 @@ static int tls_create_new_record(struct tls_offload_context_tx *offload_ctx, return 0; } -static int tls_do_allocation(struct sock *sk, - struct tls_offload_context_tx *offload_ctx, - struct page_frag *pfrag, - size_t prepend_size) +static void *tls_do_allocation(struct sock *sk, + struct tls_offload_context_tx *offload_ctx, + struct page_frag_cache *nc, + size_t prepend_size, struct page_frag *pfrag) { int ret; if (!offload_ctx->open_record) { - if (unlikely(!skb_page_frag_refill(prepend_size, pfrag, - sk->sk_allocation))) { + void *va; + + if (unlikely(!page_frag_refill_prepare(nc, prepend_size, pfrag, + sk->sk_allocation))) { READ_ONCE(sk->sk_prot)->enter_memory_pressure(sk); sk_stream_moderate_sndbuf(sk); - return -ENOMEM; + return NULL; } - ret = tls_create_new_record(offload_ctx, pfrag, prepend_size); + ret = tls_create_new_record(offload_ctx, nc, pfrag, + prepend_size); if (ret) - return ret; + return NULL; - if (pfrag->size > pfrag->offset) - return 0; + va = page_frag_alloc_refill_probe(nc, 1, pfrag); + if (va) + return va; } - if (!sk_page_frag_refill(sk, pfrag)) - return -ENOMEM; - - return 0; + return sk_page_frag_alloc_refill_prepare(sk, nc, pfrag); } static int tls_device_copy_data(void *addr, size_t bytes, struct iov_iter *i) @@ -424,8 +447,8 @@ static int tls_push_data(struct sock *sk, struct tls_prot_info *prot = &tls_ctx->prot_info; struct tls_offload_context_tx *ctx = tls_offload_ctx_tx(tls_ctx); struct tls_record_info *record; + struct page_frag_cache *nc; int tls_push_record_flags; - struct page_frag *pfrag; size_t orig_size = size; u32 max_open_record_len; bool more = false; @@ -454,7 +477,7 @@ static int tls_push_data(struct sock *sk, return rc; } - pfrag = sk_page_frag(sk); + nc = sk_page_frag_cache(sk); /* TLS_HEADER_SIZE is not counted as part of the TLS record, and * we need to leave room for an authentication tag. @@ -462,8 +485,12 @@ static int tls_push_data(struct sock *sk, max_open_record_len = TLS_MAX_PAYLOAD_SIZE + prot->prepend_size; do { - rc = tls_do_allocation(sk, ctx, pfrag, prot->prepend_size); - if (unlikely(rc)) { + struct page_frag page_frag, *pfrag; + void *va; + + pfrag = &page_frag; + va = tls_do_allocation(sk, ctx, nc, prot->prepend_size, pfrag); + if (unlikely(!va)) { rc = sk_stream_wait_memory(sk, &timeo); if (!rc) continue; @@ -512,16 +539,15 @@ static int tls_push_data(struct sock *sk, zc_pfrag.offset = off; zc_pfrag.size = copy; - tls_append_frag(record, &zc_pfrag, copy); + tls_append_dummy_frag(record, &zc_pfrag, copy); } else if (copy) { - copy = min_t(size_t, copy, pfrag->size - pfrag->offset); + copy = min_t(size_t, copy, pfrag->size); - rc = tls_device_copy_data(page_address(pfrag->page) + - pfrag->offset, copy, - iter); + rc = tls_device_copy_data(va, copy, iter); if (rc) goto handle_error; - tls_append_frag(record, pfrag, copy); + + tls_append_frag(record, nc, pfrag, copy); } size -= copy; @@ -539,7 +565,7 @@ static int tls_push_data(struct sock *sk, if (done || record->len >= max_open_record_len || (record->num_frags >= MAX_SKB_FRAGS - 1)) { tls_device_record_close(sk, tls_ctx, record, - pfrag, record_type); + nc, record_type); rc = tls_push_record(sk, tls_ctx,