These patches implement the new client-side text-based gssd upcall,
needed for v4.0 callbacks over krb5, better crypto algorithm support,
etc.
All of this is also available from the for-trond branch at
git://linux-nfs.org/~bfields/linux.git for-trond
Changes since posted versions (mainly the result of testing from Olga):
- Fix race in pipe creation ordering: gssd uses existance of the
two files ("gssd", the new pipe, and "krb5", the old one), to
decide what the kernel supports. If we create "krb5" first,
then there's a moment when gssd could think the kernel only
supports the old pipe. So create "gssd" first.
- Use different pipe operation structures to distinguish the two
pipes, instead of depending on comparing to the two dentries
in the auth; much simpler code, and avoids a race on open of a
new pipe.
- Reorder initialization in gss_alloc_msg to fix a trivial null
dereference in new upcall case.
Comments? If they look OK to you, please apply at least the first 9.
I've also appended 6 patches that use the new upcall to support krb5
callbacks. Note a couple of those touch only nfsd. I was imagining
we'd keep those all together and submit them through your tree. If you
don't want to do that, could you just ACK the last 6 patches if they're
OK? And then I'll figure out what to do with them after the rest goes
in.
--b.
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