netdev - [PATCH net-next v4 04/10] xsk: support get page by addr

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20210413031523.73507-5-xuanzhuo@linux.alibaba.com>
Date:   Tue, 13 Apr 2021 11:15:17 +0800
From:   Xuan Zhuo <xuanzhuo@...ux.alibaba.com>
To:     netdev@...r.kernel.org
Cc:     "Michael S. Tsirkin" <mst@...hat.com>,
        Jason Wang <jasowang@...hat.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Björn Töpel <bjorn@...nel.org>,
        Magnus Karlsson <magnus.karlsson@...el.com>,
        Jonathan Lemon <jonathan.lemon@...il.com>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Jesper Dangaard Brouer <hawk@...nel.org>,
        John Fastabend <john.fastabend@...il.com>,
        virtualization@...ts.linux-foundation.org, bpf@...r.kernel.org,
        "dust . li" <dust.li@...ux.alibaba.com>
Subject: [PATCH net-next v4 04/10] xsk: support get page by addr

xsk adds an interface and returns the page corresponding to
data. virtio-net does not initialize dma, so it needs page to construct
scatterlist to pass to vring.

Signed-off-by: Xuan Zhuo <xuanzhuo@...ux.alibaba.com>
Reviewed-by: Dust Li <dust.li@...ux.alibaba.com>
---
 include/net/xdp_sock_drv.h | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/include/net/xdp_sock_drv.h b/include/net/xdp_sock_drv.h
index 4e295541e396..1d08b5d8d15f 100644
--- a/include/net/xdp_sock_drv.h
+++ b/include/net/xdp_sock_drv.h
@@ -72,6 +72,12 @@ static inline dma_addr_t xsk_buff_xdp_get_frame_dma(struct xdp_buff *xdp)
 	return xp_get_frame_dma(xskb);
 }
 
+static inline struct page *xsk_buff_xdp_get_page(struct xsk_buff_pool *pool, u64 addr)
+{
+	addr = pool->unaligned ? xp_unaligned_add_offset_to_addr(addr) : addr;
+	return pool->umem->pgs[addr >> PAGE_SHIFT];
+}
+
 static inline struct xdp_buff *xsk_buff_alloc(struct xsk_buff_pool *pool)
 {
 	return xp_alloc(pool);
@@ -207,6 +213,11 @@ static inline dma_addr_t xsk_buff_xdp_get_frame_dma(struct xdp_buff *xdp)
 	return 0;
 }
 
+static inline struct page *xsk_buff_xdp_get_page(struct xsk_buff_pool *pool, u64 addr)
+{
+	return NULL;
+}
+
 static inline struct xdp_buff *xsk_buff_alloc(struct xsk_buff_pool *pool)
 {
 	return NULL;
-- 
2.31.0