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From: Stefano Brivio <sbrivio@redhat.com>
To: passt-dev@passt.top, Laurent Vivier <lvivier@redhat.com>
Cc: David Gibson <david@gibson.dropbear.id.au>
Subject: [RFC PATCH 0/5] Pad all inbound frames to 802.3 minimum size if needed
Date: Mon,  3 Nov 2025 11:16:07 +0100	[thread overview]
Message-ID: <20251103101612.1412079-1-sbrivio@redhat.com> (raw)

Patch 1/5 handles the easy non-batched case with a copy to a padded
buffer (only if needed).

Patches 2/5 and 3/5 clean coding style up before further changes.

Patch 4/5 deals with TCP and UDP batched frames in non-vhost-user modes.

Patch 5/5 is for batched frames in vhost-user mode instead, and this is
the part I'm the least confident about, in particular with regard to the
size assumptions on vhost-user provided buffers.

Stefano Brivio (5):
  tap: Pad non-batched frames to 802.3 minimum (60 bytes) if needed
  tcp: Fix coding style for comment to enum tcp_iov_parts
  udp: Fix coding style for comment to enum udp_iov_idx
  tcp, udp: Pad batched frames to 60 bytes (802.3 minimum) in
    non-vhost-user modes
  tcp, udp: Pad batched frames for vhost-user modes to 60 bytes (802.3
    minimum)

 tap.c          |  7 +++++++
 tcp.c          |  2 --
 tcp_buf.c      | 23 +++++++++++++++++++++++
 tcp_internal.h |  5 ++++-
 tcp_vu.c       | 27 +++++++++++++++++++++++++++
 udp.c          | 31 ++++++++++++++++++++++++++-----
 udp_vu.c       | 11 ++++++++++-
 util.c         |  3 +++
 util.h         |  3 +++
 9 files changed, 103 insertions(+), 9 deletions(-)

-- 
2.43.0


             reply	other threads:[~2025-11-03 10:16 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-11-03 10:16 Stefano Brivio [this message]
2025-11-03 10:16 ` [RFC PATCH 1/5] tap: Pad non-batched frames to 802.3 minimum (60 bytes) " Stefano Brivio
2025-11-03 10:20   ` Stefano Brivio
2025-11-03 11:02     ` David Gibson
2025-11-03 11:00   ` David Gibson
2025-11-04 15:25   ` Laurent Vivier
2025-11-03 10:16 ` [RFC PATCH 2/5] tcp: Fix coding style for comment to enum tcp_iov_parts Stefano Brivio
2025-11-03 11:03   ` David Gibson
2025-11-04 15:18   ` Laurent Vivier
2025-11-03 10:16 ` [RFC PATCH 3/5] udp: Fix coding style for comment to enum udp_iov_idx Stefano Brivio
2025-11-03 11:03   ` David Gibson
2025-11-04 15:18   ` Laurent Vivier
2025-11-03 10:16 ` [RFC PATCH 4/5] tcp, udp: Pad batched frames to 60 bytes (802.3 minimum) in non-vhost-user modes Stefano Brivio
2025-11-03 11:58   ` David Gibson
2025-11-04 15:31   ` Laurent Vivier
2025-11-03 10:16 ` [RFC PATCH 5/5] tcp, udp: Pad batched frames for vhost-user modes to 60 bytes (802.3 minimum) Stefano Brivio
2025-11-04 15:50   ` Laurent Vivier
2025-11-04 16:09     ` Stefano Brivio
2025-11-04 16:28       ` Laurent Vivier
2025-11-04 17:26         ` Stefano Brivio
2025-11-05  3:49   ` David Gibson
2025-12-05  0:51     ` Stefano Brivio
2025-12-05  4:12       ` David Gibson

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