The check for the success of the configuration file always resulted in a
successful return value even if the loading failed.
In addition to this, a log message referred to the active configuration
when the active configuration was set only after the processing was
complete. Since configuration failures are always fatal, there's no harm
in preemptively setting the active configuration to the one currently
being processed.
If a Galera node has a nonpositive priority, the node will never be chosen
as the master. This gives the user more control over how the master is
chosen.
The luafilter didn't use a format string with dcb_printf which can lead to
unexpected results if the returned string contains printf special
characters.
This function returns more detailed information about the fields
of a statement. Supersedes qc_get_affected_fields() that will
be deprecated and removed.
Note that this function now introduced new kind of behaviour; the
returned data belongs to the GWBUF and remains valid for as long as
the GWBUF is alive. That means that unnecessary copying need not
be done.
When a persistent connection is taken from the pool, the state is reset
with a COM_CHANGE_USER on the next write. This allows reuse of persistent
connections without having to worry about the state of the MySQL session.
Given a config file "config.cnf", we look for the directory
"config.cnf.d" and recursively in that hierarhcy load all files
whose suffix is ".cnf"; other files are ignored.
Currently duplicate sections are checked on a file by file basis.
That will be changed so that duplicate sections are not allowed
across all the files.
- First <maxscale/cdefs.h>
- Then all system, c-runtime, OS include files in alphabetical order.
- Then include files for "3rd-party" software in a loose order of
importance.
- Then maxscale headers ordered alphabetically.
Now that a filter can express that the transaction state is tracked,
the cache implementation can be simplified. We do not need to cater
for the case that a "too short" or "too long" a packet would be
delivered.
Further, since the autocommit mode and transaction state of the session
are tracked, the filter can cache data when it is safe to do so. In
practice that means when either AUTOCOMMIT is ON and no explicit
transaction is active or when a READ ONLY transaction is active,
irrespective of the autocommit state.
In principle it would be possible to tentatively cache data during
a transaction, and if the transaction is committed successfully
flush the tentatively cached data to the actual cache, but that will
be for another day.
The transaction state only reflects explicitly started transactions.
Thus, by looking at the autocommit mode and the transaction state a
component can figure out whether the current statement will be committed
or not.
The transaction state must be updated after a buffer has been split
into buffer containing individual packets.
NOTE: The actual updating of the transaction state and the autocommit
mode is currently wrong, but will be updated in a subsequent change.
The authentication checks make sure that a user has all the required
grants to access the database. This prevents the creation of unnecessary
backend connections reducing the overall load on the database.
Doing preliminary authentication in MaxScale enables the creation of more
informative error messages.
With this change, whether something should be logged or, that is,
whether the used log priority is enabled or not, is checked before
the logging function is called. That should save a few cycles.
Now mxs_log_message() always logs a message, without consideration
for whether the priority is enabled or not. The inline function
mxs_log_is_priority_enabled() returns true if a particular priority
is enabled and the MXS_LOG_MESSAGE() macro (that MXS_ERROR etc. are
expanded into) call that before calling the actual logging function.
Some of the tests depended on a working installation where modules are all
located at the default paths. These tests now explicitly set the module
directory which fixes the immediate problem.
Disabled the starting of services in the service test as this will fail
with real modules. The dummy internal modules aren't build and should be
removed in a later commit. In general, it might be better to do service
level testing outside the internal test suite.
The HTTPD protocol mistakenly assumed that the `authenticator` parameter
of a listener would be NULL if the default authenticator is used.
Recent changes modified it so that the value is never NULL and
`NullAuthDeny` would be used for protocols which did not implement the
auth_default entry point.
Common capabilities are now defined in routing.h. The common
capabilities can be defined using bits 0 - 15.
Router capabilities are defined using bits 16-31 and filter
capabilities (should there ever be such) using bits 32-47.
So, to find out the capabilities of a service you only need to
OR the capabilities of the router and all filters together.
For instance, if a single filter needs statement based routing,
then that is what is done.
Doing the checksum matching after memory is allocated and all the work is
done is not very efficient. A simpler solution is to always replace the
users when we reload them.
Replacing the users every time the service users are reloaded will not
cause a degradation in performance because the previous implementation
already does all the extra work but then just discards it.
A faster solution would be to first query the server and request some sort
of a checksum based on the result set the users query would
create. Currently, this can be done inside a stored procedure but it is
not very convenient for the average user. Another option would be to
generate a long string with GROUP_CONCAT but it is highly likely that some
internal buffer limit is hit before the complete value is calculated.
The path that was given as the option for the cache directory wasn't
properly checked for terminating forward slashes. Due to this, the cache
file was created with the wrong name.
The dbusers.c was a MySQL protocol specific file which was used directly
by some of the modules.
Added a new return value for the loadusers authenticator entry point which
allows fatal failures to occur when users are loaded. Currently this is
only taken into notice when the service is first started. If a listener
later returns a fatal error, it is only logged but the service stays in
operation.
Moved the MySQLAuth authenticator sources and the tests that relate to
this module into a subdirectory in the authenticator
directory. Eventually, all authenticators could have a subdirectory of
their own.
The MySQL authenticator now injects the service user into the list of
allowed users if loading of database users fails. This allows the removal
of common code in the binlogrouter and maxinfo modules.
This tracks only what is explicitly set. That is, if autocommit
has been set true then, even if a transaction is started, autocommit
will not be set false.
That is, a user of the session autocommit and transaction states
need to be aware of their semantics. If a transaction is active,
then the state of autocommit is irrelevant.
When a MySQL SSL connection is made, the first packet from the client will
contain the SSLRequest packet. This packet is a truncated normal auth
packet and the real auth packet will be sent after SSL has been
established.
The MySQLClient protocol should read the client information for SSL
connections after SSL has been established.
When a client without SSL connected to a listener which requires SSL, the
error message always used the package sequence number 3 even if the
response was the second packet.
Also fixed debug assertions which failed when non-SSL connections were
created to SSL listeners.
