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CLEAR_IF_FIRST only works if *all* openers use that flag.
So just truncate the file: it's racy, but that's what we're doing anyway.
We'd really need a TDB_OPENCHECK_OR_CLEAR flag to do this properly (or in
TDB2, a open hook at the right point).
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
TDB_CLEAR_IF_FIRST tdb's. For tdb's like gencache where we open
without CLEAR_IF_FIRST and then with CLEAR_IF_FIRST if corrupt
this is still safe to use as if opening an existing tdb the new
hash will be ignored - it's only used on creating a new tdb not
opening an old one.
Jeremy.
If thousands of smbds try to gencache_stabilize at the same time because the
network died, all of them might be sitting in transaction_start. Don't do the
stabilize transaction if nothing has changed in gencache_notrans.tdb.
Volker
This provides a compromise between stability and performance: gencache is a
persistent database these days that for performance reasons can not use tdb
transactions for all writes. This patch splits up gencache into gencache.tdb
and gencache_notrans.tdb. gencache_notrans is used with CLEAR_IF_FIRST, writes
to it don't use transactions. By default every 5 minutes and when a program
exits, all entries from _notrans.tdb are transferred to gencache.tdb in one
transaction.
gencache_get/set/del/iterate call gencache_init() internally anyway. And we've
been very lazy calling gencache_shutdown, so this seems not really required.
net cache get was the only one interested in the timeout. That single caller
can take care of the timeout itself then.
With this API change idmap_cache.c can be converted to gencache.
(This used to be commit 2954b2be563149380e1fae7fe088b98d6cbd42e7)
warning: ignoring return value of 'asprintf', declared with attribute warn_unused_result
(This used to be commit ad37b7b0aee265a3e4d8b7552610f4b9a105434d)
bugs in various places whilst doing this (places that assumed
BOOL == int). I also need to fix the Samba4 pidl generation
(next checkin).
Jeremy.
(This used to be commit f35a266b3cbb3e5fa6a86be60f34fe340a3ca71f)
Mimir, please have a look. DATA_BLOBs will now just show up as "DATA_BLOB"
values with "net cache list".
Guenther
(This used to be commit b8ad546d041a2a8cc85c7db8eba4d2d3b97df1a8)
if a valid entry was found. The newer calls got the latter one wrong, change
the older calls.
Volker
(This used to be commit 554e68887bc84510690226c9b07a872e7a282abe)
support when looking up DC's. On every CLDAP
call store the returned client sitename (if
present, delete store if not) in gencache with
infinate timeout. On AD DNS DC lookup, try looking
for sitename DC's first, only try generic if
sitename DNS lookup failed.
I still haven't figured out yet how to ensure
we fetch the sitename with a CLDAP query before
doing the generic DC list lookup. This code is
difficult to understand. I'll do some experiments
and backtraces tomorrow to try and work out where
to force a CLDAP site query first.
Jeremy.
(This used to be commit ab3f0c5b1e9c5fd192c5514cbe9451b938f9cd5d)
