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Callers should use lp_parm_substituted_string()
directly or just use lp_parm_const_string().
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
We don't need any substitution for elasticsearch options.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
The idea is to get rid of the global state that's
currently used for the substitution in lp_string().
In the end all callers need to pass an explicit
const struct loadparm_substitution *sub_ctx,
which contains all relevant information
for the substitution. At that point lp_string() can be removed.
For now we provide loadparm_s3_global_substitution()
for callers to keep the current bahavior unchanged.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
Signed-off-by: Christof Schmitt <cs@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Tue Nov 26 22:55:38 UTC 2019 on sn-devel-184
The comment "this is used in very hot code paths" is not true right now, but
will get true soon....
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Signed-off-by: Guenther Deschner <gd@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
Autobuild-User(master): Andreas Schneider <asn@cryptomilk.org>
Autobuild-Date(master): Tue Nov 26 14:14:51 UTC 2019 on sn-devel-184
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Sat Nov 23 01:25:12 UTC 2019 on sn-devel-184
Now we have one fixed field for the exclusive lock holder and an array
of shared locks. This way we now prioritize writers over readers: If a
pending write comes in while readers are active, it will put itself
into the exclusive slot. Then it waits for the readers to vanish. Only
when all readers are gone the exclusive lock request is granted. New
readers will just look at the exclusive slot and see it's taken. They
will then line up as watchers, retrying whenever things change.
This also means that it will be cheaper to support many shared locks:
Granting a shared lock just means to extend the array. We don't have
to walk the array for possible conflicts.
This also adds explicit UPGRADE and DOWNGRADE operations for better
error checking.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
This will allow using the g_lock.c logic on other databases as well
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
In the future, g_lock will not check for duplicate READ locks anymore,
as there might be many of them and the check might be expensive
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Soon the g_lock database format will change. There will be one
exclusive entry and an array of shared entries. In that format,
there's no need to attach a lock_type to each entry in the g_lock
database. Reflect this change in the g_lock_dump API
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
For now this is a simple wrapper around dbwrap_watched_watch_send()
that will make the direct db_record reference in struct
share_mode_data unnecessary.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
The history of this file is a mess with lots of bugs. Most of the bugs
I believe are based on the cache of database contents we maintain in
struct dbwrap_watch_rec. This patch removes that cache and does all
modifications directly in the backend database.
This means we have to mess with the database format in a few more
places, but I think the format is simple enough that this does not
really hurt.
I tried for a few days to split this up into small pieces that are
easier to understand, but every time I separated out individual chunks
I found difficult to track down bugs that are all resolved in the
final code presented here. It's more lines of code, but I hope it's more
robust.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
With the wakeup messages changed, we don't need to store what used to
be the old message in the struct dbwrap_watched_watch_state
anymore. We still need to store the key that is watched for removal of
our watch entry in the request destructor
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
