Messages in this thread | | | Date | Sat, 7 Jun 2003 21:12:35 +0200 | From | Adrian Bunk <> | Subject | Re: [Lksctp-developers] Re: SCTP config 2.5.70(-bk) |
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On Tue, Jun 03, 2003 at 04:07:08PM -0500, Jon Grimm wrote:
> Hi Adrian,
Hi Jon,
> Sorry for a bit of delay... We are away at an SCTP Interoperability > event.
the delay before my answer was bigger...
> Adrian Bunk wrote: > >On Mon, Jun 02, 2003 at 09:53:04AM +0200, Margit Schubert-While wrote: > > > > > >>CONFIG_IPV6_SCTP__ is always being set to "y" even though > >>not selected (CONFIG_IPV6 not set) > > > > > >First, this doesn't do any harm since CONFIG_IPV6_SCTP__ alone doensn't > >result in anything getting compiled. > > > >But besides, it seems a bit broken. > > > >From net/sctp/Kconfig: > > > ><-- snip --> > > > >... > > > >config IPV6_SCTP__ > > tristate > > default y if IPV6=n > > default IPV6 if IPV6 > > > >config IP_SCTP > > tristate "The SCTP Protocol (EXPERIMENTAL)" > > depends on IPV6_SCTP__ > >... > > > ><-- snip --> > > > > > >Semantically equivalent is the following for IPV6_SCTP__: > > > >config IPV6_SCTP__ > > tristate > > default y if IPV6=n || IPV6=y > > default m if IPV6=m > > > > > >If it was intended to disallow a static IP_SCTP with a modular IPV6 it > >doesn't work: It's perfectly allowed to set IPV6=n and IP_SCTP=y and > >later compile and install a modular IPV6 for the same kernel. > > > > Are you sure? I vaguely remember one of the network structs having > #ifdef'd fields for v6. Consequently, if one compiles first without, > but the tries later compiles/loads ipv6... bad things happen as the > kernel has a different concept of what the sock is.
after reading this at net/Kconfig:
<-- snip -->
... # IPv6 as module will cause a CRASH if you try to unload it config IPV6 tristate "The IPv6 protocol (EXPERIMENTAL)" ...
<-- snip -->
I'm wondering whether it might be an idea to disallow the modular building of IPv6 support?
> >Could someone from the SCTP developers comment on the intentions behind > >IPV6_SCTP__ ? > > > > Yes. The intent was to at least discourage a configuration that will > segfault.
It's currently discouraged but not completelyt impossible to select...
> Thanks, > jon
cu Adrian
--
"Is there not promise of rain?" Ling Tan asked suddenly out of the darkness. There had been need of rain for many days. "Only a promise," Lao Er said. Pearl S. Buck - Dragon Seed
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