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Felix Maurer b2c26c82f7 hsr: Follow standard for HSRv0 supervision frames 
For HSRv0, the path_id has the following meaning:
- 0000: PRP supervision frame
- 0001-1001: HSR ring identifier
- 1010-1011: Frames from PRP network (A/B, with RedBoxes)
- 1111: HSR supervision frame

Follow the IEC 62439-3:2010 standard more closely by setting the right
path_id for HSRv0 supervision frames (actually, it is correctly set when
the frame is constructed, but hsr_set_path_id() overwrites it) and set a
fixed HSR ring identifier of 1. The ring identifier seems to be generally
unused and we ignore it anyways on reception, but some fixed identifier is
definitely better than using one identifier in one direction and a wrong
identifier in the other.

This was also the behavior before commit f266a683a4 ("net/hsr: Better
frame dispatch") which introduced the alternating path_id. This was later
moved to hsr_set_path_id() in commit 451d8123f8 ("net: prp: add packet
handling support").

The IEC 62439-3:2010 also contains 6 unused bytes after the MacAddressA in
the HSRv0 supervision frames. Adjust a TODO comment accordingly.

Fixes: f266a683a4 ("net/hsr: Better frame dispatch")
Fixes: 451d8123f8 ("net: prp: add packet handling support")
Signed-off-by: Felix Maurer <fmaurer@redhat.com>
Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Link: https://patch.msgid.link/ea0d5133cd593856b2fa673d6e2067bf1d4d1794.1762876095.git.fmaurer@redhat.com
Tested-by: Hangbin Liu <liuhangbin@gmail.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2025-11-13 15:55:04 +01:00
..
hsr_debugfs.c saner replacement for debugfs_rename() 2025-01-15 13:14:37 +01:00
hsr_device.c hsr: Follow standard for HSRv0 supervision frames 2025-11-13 15:55:04 +01:00
hsr_device.h net: hsr: Provide RedBox support (HSR-SAN) 2024-04-26 12:04:43 +02:00
hsr_forward.c hsr: Follow standard for HSRv0 supervision frames 2025-11-13 15:55:04 +01:00
hsr_forward.h net: hsr: fix mac_len checks 2021-05-24 14:10:28 -07:00
hsr_framereg.c treewide, timers: Rename from_timer() to timer_container_of() 2025-06-08 09:07:37 +02:00
hsr_framereg.h net: hsr: Fix PRP duplicate detection 2025-03-13 10:04:22 +01:00
hsr_main.c hsr: use hsr_for_each_port_rtnl in hsr_port_get_hsr 2025-09-11 11:49:19 +02:00
hsr_main.h hsr: use rtnl lock when iterating over ports 2025-09-11 11:49:19 +02:00
hsr_netlink.c net: hsr: prevent creation of HSR device with slaves from another netns 2025-10-22 19:22:22 -07:00
hsr_netlink.h net/hsr: Remove unused function declarations 2023-07-31 20:11:47 -07:00
hsr_slave.c hsr: use netdev_master_upper_dev_link() when linking lower ports 2025-09-09 11:27:37 +02:00
hsr_slave.h net: prp: add packet handling support 2020-07-27 12:20:40 -07:00
Kconfig net: hsr: Add KUnit test for PRP 2025-03-13 10:04:22 +01:00
Makefile net: hsr: Add KUnit test for PRP 2025-03-13 10:04:22 +01:00
prp_dup_discard_test.c net: hsr: Add KUnit test for PRP 2025-03-13 10:04:22 +01:00