netdev - [PATCH net-next v3 0/4] netdevsim: link and forward skbs between ports

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 for Android: free password hash cracker in your pocket

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

Message-Id: <20231214212443.3638210-1-dw@davidwei.uk>
Date: Thu, 14 Dec 2023 13:24:39 -0800
From: David Wei <dw@...idwei.uk>
To: Jakub Kicinski <kuba@...nel.org>,
	Jiri Pirko <jiri@...nulli.us>,
	Sabrina Dubroca <sd@...asysnail.net>,
	netdev@...r.kernel.org
Cc: "David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Paolo Abeni <pabeni@...hat.com>
Subject: [PATCH net-next v3 0/4] netdevsim: link and forward skbs between ports

This patchset adds the ability to link two netdevsim ports together and
forward skbs between them, similar to veth. The goal is to use netdevsim
for testing features e.g. zero copy Rx using io_uring.

This feature was tested locally on QEMU, and a selftest is included.

---
v2->v3:
- take lock when traversing nsim_bus_dev_list
- take device ref when getting a nsim_bus_dev
- return 0 if nsim_dev_peer_read cannot find the port
- address code formatting
- do not hard code values in selftests
- add Makefile for selftests

v1->v2:
- renamed debugfs file from "link" to "peer"
- replaced strstep() with sscanf() for consistency
- increased char[] buf sz to 22 for copying id + port from user
- added err msg w/ expected fmt when linking as a hint to user
- prevent linking port to itself
- protect peer ptr using RCU

David Wei (4):
  netdevsim: allow two netdevsim ports to be connected
  netdevsim: forward skbs from one connected port to another
  netdevsim: add selftest for forwarding skb between connected ports
  netdevsim: add Makefile for selftests

 MAINTAINERS                                   |   1 +
 drivers/net/netdevsim/bus.c                   |  17 +++
 drivers/net/netdevsim/dev.c                   |  88 +++++++++++++
 drivers/net/netdevsim/netdev.c                |  29 ++++-
 drivers/net/netdevsim/netdevsim.h             |   3 +
 .../selftests/drivers/net/netdevsim/Makefile  |  18 +++
 .../selftests/drivers/net/netdevsim/peer.sh   | 123 ++++++++++++++++++
 7 files changed, 274 insertions(+), 5 deletions(-)
 create mode 100644 tools/testing/selftests/drivers/net/netdevsim/Makefile
 create mode 100755 tools/testing/selftests/drivers/net/netdevsim/peer.sh

-- 
2.39.3