Trac Ticket #351 - use betxn plugins by default
Trac Ticket #352 - make cos, roles, views betxn aware
. Enabled betxn by default on the following plugins:
7-bit check Plugin, Attribute uniqueness Plugin
Auto Membership Plugin, Managed Entries, MemberOf Plugin
Multimaster Replication Plugin, PAM Pass Through Auth Plugin
Referential integrity postoperation Plugin
Roles Plugin, State Change Plugin, USN Plugin
. Exposed backend transaction to plugins:
. Backend serial lock is held just before the backend transaction
in the dblayer_txn_begin function and released after it is
committed or aborted in dblayer_txn_commit or abort, respectively.
The transaction begin call has to be before "finding" the backend
entry to avoid the deadlock between the serial lock and the
individual entry cache lock. Thus the transaction begins earlier
than this patch.
. dse: adjusting to the bepost behaviour, put betxn post hook into
. Class of Service Plugin:
+ register cos_postop_init as postoperation only (not betxn).
cos_post_op set in cos_post_init is a wrapper of cos_cache_
change_notify, which does not have any backend operations.
Thus, no need to be in transaction. Rather, if putting it
in the transaction it could cause a deadlock between change_
lock and transaction.
. MemberOf Plugin:
+ If betxn is on, MemberOf post operations are called at the
betxn postop timing, which is aborted if the main operation
+ When betxn is on, member of operations are in the transaction
as sell as in the backend serial lock. Taking advantage of it,
memberof_lock is not held if betxn is on.
+ MemberOf fixup task uses exposed transaction APIs.
. Multimaster Replication Plugin
+ If betxn is on, Multimaster Replication bepreop operations
are called at the betxn preop timing and bepost operations are
called at the betxn postop timing. Note: since betxn post call-
backs are already declared, each bepost callback is called from
the existing betxn post callbacks (see multimaster_be_betxnpostop_*).
. PAM Pass Through Auth Plugin:
+ If betxn is on, PAM Pass Through pre/post operations are called
at the betxn preop/postop timing, respectivly.
. Referential integrity postoperation Plugin
+ If betxn is on, Referential integrity post operations are called
at the betxn postop timing.
+ When betxn is on, referential integirity post operations are in
the transaction as sell as in the backend serial lock. Taking
advantage of it, referint_lock is not held if betxn is on.
+ cos_cache.h: added '#include "ldaplog.h" and removed copied
LDAPDebug from cos.c and cos_cache.c.
+ cos_cache.c: added missing CR at the end of some error messages.
+ repl5_replica.c: removed (nscpentrydn=*) from searching tombstone
+ entry.c: in addition to "true"|"false", "yes"|"no", and digits,
let slapi_entry_attr_get_bool accept "on"|"off".
+ mapping_tree.c: changed the log level of a warning "Mapping tree
node entry for "" point to an unknown backend" issued in mtn_get_be
to BACKLDBM". This message is logged at the start up time of Class
of Service plugin from the dse hook, which is benign.