From: Yuri Benditovich <yuri.benditovich@daynix.com>
To: Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Andrii Nakryiko <andrii@kernel.org>,
Martin KaFai Lau <kafai@fb.com>, Song Liu <songliubraving@fb.com>,
Yonghong Song <yhs@fb.com>,
John Fastabend <john.fastabend@gmail.com>,
KP Singh <kpsingh@kernel.org>
Cc: yan@daynix.com, netdev@vger.kernel.org, bpf@vger.kernel.org
Subject: [RFC PATCH 0/7] Support for virtio-net hash reporting
Date: Tue, 5 Jan 2021 14:24:09 +0200 [thread overview]
Message-ID: <20210105122416.16492-1-yuri.benditovich@daynix.com> (raw)
Existing TUN module is able to use provided "steering eBPF" to
calculate per-packet hash and derive the destination queue to
place the packet to. The eBPF uses mapped configuration data
containing a key for hash calculation and indirection table
with array of queues' indices.
This series of patches adds support for virtio-net hash reporting
feature as defined in virtio specification. It extends the TUN module
and the "steering eBPF" as follows:
Extended steering eBPF calculates the hash value and hash type, keeps
hash value in the skb->hash and returns index of destination virtqueue
and the type of the hash. TUN module keeps returned hash type in
(currently unused) field of the skb.
skb->__unused renamed to 'hash_report_type'.
When TUN module is called later to allocate and fill the virtio-net
header and push it to destination virtqueue it populates the hash
and the hash type into virtio-net header.
VHOST driver is made aware of respective virtio-net feature that
extends the virtio-net header to report the hash value and hash report
type.
Yuri Benditovich (7):
skbuff: define field for hash report type
vhost: support for hash report virtio-net feature
tun: allow use of BPF_PROG_TYPE_SCHED_CLS program type
tun: free bpf_program by bpf_prog_put instead of bpf_prog_destroy
tun: add ioctl code TUNSETHASHPOPULATION
tun: populate hash in virtio-net header when needed
tun: report new tun feature IFF_HASH
drivers/net/tun.c | 43 +++++++++++++++++++++++++++++++------
drivers/vhost/net.c | 37 ++++++++++++++++++++++++-------
include/linux/skbuff.h | 7 +++++-
include/uapi/linux/if_tun.h | 2 ++
4 files changed, 74 insertions(+), 15 deletions(-)
--
2.17.1
next reply other threads:[~2021-01-05 12:25 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-05 12:24 Yuri Benditovich [this message]
2021-01-05 12:24 ` [RFC PATCH 3/7] tun: allow use of BPF_PROG_TYPE_SCHED_CLS program type Yuri Benditovich
2021-01-05 19:30 ` Alexei Starovoitov
2021-01-05 12:24 ` [RFC PATCH 4/7] tun: free bpf_program by bpf_prog_put instead of bpf_prog_destroy Yuri Benditovich
2021-01-05 12:24 ` [RFC PATCH 5/7] tun: add ioctl code TUNSETHASHPOPULATION Yuri Benditovich
2021-01-05 12:24 ` [RFC PATCH 6/7] tun: populate hash in virtio-net header when needed Yuri Benditovich
2021-01-05 17:21 ` [RFC PATCH 0/7] Support for virtio-net hash reporting Willem de Bruijn
2021-01-12 19:36 ` Yuri Benditovich
2021-01-12 19:41 Yuri Benditovich
2021-01-12 19:49 ` Yuri Benditovich
2021-01-12 20:28 ` Yuri Benditovich
2021-01-12 23:47 ` Willem de Bruijn
2021-01-13 4:05 ` Jason Wang
2021-01-13 14:33 ` Willem de Bruijn
2021-01-14 3:38 ` Jason Wang
2021-01-17 7:57 ` Yuri Benditovich
2021-01-18 2:46 ` Jason Wang
2021-01-18 9:09 ` Yuri Benditovich
2021-01-18 15:19 ` Willem de Bruijn
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