On 07.08.20 18:23, Al Viro wrote: Hi, >> This is a concept from Plan9. The main purpose is allowing applications >> "dialing" some connection, do initial handshakes (eg. authentication) >> and then publish the connection to other applications, that now can now >> make use of the already dialed connection. > > Yeah, but... Linux open() always gets a new struct file instance; I know :( > how > do you work around that? Some variant of ->atomic_open() API change? > Details, please. Proxy struct file. Yes, this adds lots of bloat :( https://github.com/metux/linux-srvfs-oot/blob/master/kernel/proxy.c I thought about some possible ugly tricks of copying over one into another, but that could easily end up in a desaster. Another idea would be adding a new fs-op that returns it's own struct file - basically kinda per-fs open() syscall - which is called instead of .open, if defined. But for now, I tried to implement it as oot-module (and submit for mainline later), so it could also be used on existing distro kernels. Maybe that's not the best idea at all :o What'd be your suggestion ? --mtx -- --- Hinweis: unverschlüsselte E-Mails können leicht abgehört und manipuliert werden ! Für eine vertrauliche Kommunikation senden Sie bitte ihren GPG/PGP-Schlüssel zu. --- Enrico Weigelt, metux IT consult Free software and Linux embedded engineering info@xxxxxxxxx -- +49-151-27565287
