On Sun, 2005-02-27 at 23:39 -0800, Andrew Morton wrote: > Guillaume Thouvenin <[EMAIL PROTECTED]> wrote: > > > > Ok the protocol is maybe too "basic" but with this mechanism the user > > space application that uses the fork connector can start and stop the > > send of messages. This implementation needs somme improvements because > > currently, if two application are using the fork connector one can > > enable it and the other don't know if it is enable or not, but the idea > > is here I think. > > Yes. But this problem can be solved in userspace, with a little library > function and a bit of locking. > > IOW: use the library to enable/disable the fork connector rather than > directly doing syscalls. > > It has the problem that if a client of that library crashes, the counter > gets out of whack, but really, it's not all _that_ important, and to handle > this properly in-kernel each client would need an open fd against some > object so we can do the close-on-exit thing properly. You'd need to create > a separate netlink socket for the purpose.
Why dont just extend protocol a bit?
Add header after cn_msg, which will have get/set field and that is all.
Properly using seq/ack fields userspace can avoid locks.
--
Evgeniy Polyakov
Crash is better than data corruption -- Arthur Grabowski
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