On Wednesday, June 17, 2020 8:03 AM, Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx> wrote: > On 6/17/20 2:59 PM, Kurt Van Dijck wrote: > > > > - 6. /proc/net/can-j1939 Interface. > > > - > > > - > > > - Files giving you a view on the in-kernel operation of J1939 are located at: > > > - /proc/net/j1939. > > > - > > > - 6.1 /proc/net/can-j1939/ecu > > > - > > > - This file gives an overview of the known ECU's to the kernel. > > > - - iface : network interface they operate on. > > > - - SA : current address. > > > - - name : 64bit NAME > > > - - flags : 'L' = local, 'R' = remote > > > > > > I am interested in what happened to this feature since I do not see it in the latest implementation or in the documentation? > > > > The feature got removed, as (almost) all of the /proc interface > > for making mainline integration easier. > > The idea was to restore the required interfaces when necessary. That's what I thought, thanks! > > ...or rather use something modern and machine readable. > > > > I am interested in retrieving "known ECU's to the kernel" in the latest implementation. What is recommended? > > > > I understand your question. The simple answer right now is: there isn't. > > we could debate about this being necessary in /proc, > > or rather in debugfs, > > since this knowledge should not be used in real applications? > > Am I right that your intended use is debugging related? I think this would be great for debugging and helpful in a development environment but I am being asked to include this feature in production. If you have time, can you please elaborate on why this should not be used in real applications? > > Today we probably want to have a netlink interface to read that information from > the kernel. > > Marc > > ----------------------------------------------------------------------------------------------------- > > Pengutronix e.K. | Marc Kleine-Budde | > Embedded Linux | https://www.pengutronix.de | > Vertretung West/Dortmund | Phone: +49-231-2826-924 | > Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
