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From: Lorenzo Bianconi <lorenzo@kernel.org>
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 v20 bpf-next 01/23] net: skbuff: add size metadata to skb_shared_info for xdp
Date: Fri, 10 Dec 2021 20:14:08 +0100	[thread overview]
Message-ID: <fb929b6db22166685fea807e3fc20b49fed74597.1639162845.git.lorenzo@kernel.org> (raw)
In-Reply-To: <cover.1639162845.git.lorenzo@kernel.org>

Introduce xdp_frags_size field in skb_shared_info data structure
to store xdp_buff/xdp_frame frame paged size (xdp_frags_size will
be used in xdp multi-buff support). In order to not increase
skb_shared_info size we will use a hole due to skb_shared_info
alignment.

Acked-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
---
 include/linux/skbuff.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 686a666d073d..2eecb6931975 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -535,6 +535,7 @@ struct skb_shared_info {
 	 * Warning : all fields before dataref are cleared in __alloc_skb()
 	 */
 	atomic_t	dataref;
+	unsigned int	xdp_frags_size;
 
 	/* Intermediate layers must ensure that destructor_arg
 	 * remains valid until skb destructor */
-- 
2.33.1


  reply	other threads:[~2021-12-10 19:15 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-12-10 19:14 [PATCH v20 bpf-next 00/23] mvneta: introduce XDP multi-buffer support Lorenzo Bianconi
2021-12-10 19:14 ` Lorenzo Bianconi [this message]
2021-12-10 19:14 ` [PATCH v20 bpf-next 02/23] xdp: introduce flags field in xdp_buff/xdp_frame Lorenzo Bianconi
2021-12-10 19:14 ` [PATCH v20 bpf-next 03/23] net: mvneta: update mb bit before passing the xdp buffer to eBPF layer Lorenzo Bianconi
2021-12-11  0:09   ` John Fastabend
2021-12-10 19:14 ` [PATCH v20 bpf-next 04/23] net: mvneta: simplify mvneta_swbm_add_rx_fragment management Lorenzo Bianconi
2021-12-10 19:14 ` [PATCH v20 bpf-next 05/23] net: xdp: add xdp_update_skb_shared_info utility routine Lorenzo Bianconi
2021-12-10 19:14 ` [PATCH v20 bpf-next 06/23] net: marvell: rely on " Lorenzo Bianconi
2021-12-10 19:14 ` [PATCH v20 bpf-next 07/23] xdp: add multi-buff support to xdp_return_{buff/frame} Lorenzo Bianconi
2021-12-10 19:14 ` [PATCH v20 bpf-next 08/23] net: mvneta: add multi buffer support to XDP_TX Lorenzo Bianconi
2021-12-10 19:14 ` [PATCH v20 bpf-next 09/23] bpf: introduce BPF_F_XDP_MB flag in prog_flags loading the ebpf program Lorenzo Bianconi
2021-12-10 19:14 ` [PATCH v20 bpf-next 10/23] net: mvneta: enable jumbo frames if the loaded XDP program support mb Lorenzo Bianconi
2021-12-10 19:14 ` [PATCH v20 bpf-next 11/23] bpf: introduce bpf_xdp_get_buff_len helper Lorenzo Bianconi
2021-12-10 19:14 ` [PATCH v20 bpf-next 12/23] bpf: add multi-buff support to the bpf_xdp_adjust_tail() API Lorenzo Bianconi
2021-12-11  0:11   ` John Fastabend
2021-12-10 19:14 ` [PATCH v20 bpf-next 13/23] bpf: add multi-buffer support to xdp copy helpers Lorenzo Bianconi
2021-12-10 19:14 ` [PATCH v20 bpf-next 14/23] bpf: move user_size out of bpf_test_init Lorenzo Bianconi
2021-12-10 19:14 ` [PATCH v20 bpf-next 15/23] bpf: introduce multibuff support to bpf_prog_test_run_xdp() Lorenzo Bianconi
2021-12-10 19:14 ` [PATCH v20 bpf-next 16/23] bpf: test_run: add xdp_shared_info pointer in bpf_test_finish signature Lorenzo Bianconi
2021-12-10 19:14 ` [PATCH v20 bpf-next 17/23] bpf: selftests: update xdp_adjust_tail selftest to include multi-buffer Lorenzo Bianconi
2021-12-10 19:14 ` [PATCH v20 bpf-next 18/23] libbpf: Add SEC name for xdp_mb programs Lorenzo Bianconi
2021-12-10 19:14 ` [PATCH v20 bpf-next 19/23] bpf: generalise tail call map compatibility check Lorenzo Bianconi
2021-12-10 19:14 ` [PATCH v20 bpf-next 20/23] net: xdp: introduce bpf_xdp_pointer utility routine Lorenzo Bianconi
2021-12-10 19:14 ` [PATCH v20 bpf-next 21/23] bpf: selftests: introduce bpf_xdp_{load,store}_bytes selftest Lorenzo Bianconi
2021-12-10 19:14 ` [PATCH v20 bpf-next 22/23] bpf: selftests: add CPUMAP/DEVMAP selftests for xdp multi-buff Lorenzo Bianconi
2021-12-10 19:14 ` [PATCH v20 bpf-next 23/23] xdp: disable XDP_REDIRECT " Lorenzo Bianconi
2021-12-11  6:49   ` Jesper Dangaard Brouer
2021-12-11  0:16 ` [PATCH v20 bpf-next 00/23] mvneta: introduce XDP multi-buffer support John Fastabend
2021-12-11 17:38 ` Toke Høiland-Jørgensen
2021-12-28 14:45 ` Lorenzo Bianconi
2021-12-30  2:07   ` Alexei Starovoitov

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