MariaDB 10.0/MySQL 5.6 using innodb-page-size!=16K

The storage format of FSP_SPACE_FLAGS was accidentally broken
already in MariaDB 10.1.0. This fix is bringing the format in
line with other MySQL and MariaDB release series.

Please refer to the comments that were added to fsp0fsp.h
for details.

This is an INCOMPATIBLE CHANGE that affects users of
page_compression and non-default innodb_page_size. Upgrading
to this release will correct the flags in the data files.
If you want to downgrade to earlier MariaDB 10.1.x, please refer
to the test innodb.101_compatibility how to reset the
FSP_SPACE_FLAGS in the files.

NOTE: MariaDB 10.1.0 to 10.1.20 can misinterpret
uncompressed data files with innodb_page_size=4k or 64k as
compressed innodb_page_size=16k files, and then probably fail
when trying to access the pages. See the comments in the
function fsp_flags_convert_from_101() for detailed analysis.

Move PAGE_COMPRESSION to FSP_SPACE_FLAGS bit position 16.
In this way, compressed innodb_page_size=16k tablespaces will not
be mistaken for uncompressed ones by MariaDB 10.1.0 to 10.1.20.

Derive PAGE_COMPRESSION_LEVEL, ATOMIC_WRITES and DATA_DIR from the
dict_table_t::flags when the table is available, in
fil_space_for_table_exists_in_mem() or fil_open_single_table_tablespace().
During crash recovery, fil_load_single_table_tablespace() will use
innodb_compression_level for the PAGE_COMPRESSION_LEVEL.

FSP_FLAGS_MEM_MASK: A bitmap of the memory-only fil_space_t::flags
that are not to be written to FSP_SPACE_FLAGS. Currently, these will
include PAGE_COMPRESSION_LEVEL, ATOMIC_WRITES and DATA_DIR.

Introduce the macro FSP_FLAGS_PAGE_SSIZE(). We only support
one innodb_page_size for the whole instance.

When creating a dummy tablespace for the redo log, use
fil_space_t::flags=0. The flags are never written to the redo log files.

Remove many FSP_FLAGS_SET_ macros.

dict_tf_verify_flags(): Remove. This is basically only duplicating
the logic of dict_tf_to_fsp_flags(), used in a debug assertion.

fil_space_t::mark: Remove. This flag was not used for anything.

fil_space_for_table_exists_in_mem(): Remove the unnecessary parameter
mark_space, and add a parameter for table flags. Check that
fil_space_t::flags match the table flags, and adjust the (memory-only)
flags based on the table flags.

fil_node_open_file(): Remove some redundant or unreachable conditions,
do not use stderr for output, and avoid unnecessary server aborts.

fil_user_tablespace_restore_page(): Convert the flags, so that the
correct page_size will be used when restoring a page from the
doublewrite buffer.

fil_space_get_page_compressed(), fsp_flags_is_page_compressed(): Remove.
It suffices to have fil_space_is_page_compressed().

FSP_FLAGS_WIDTH_DATA_DIR, FSP_FLAGS_WIDTH_PAGE_COMPRESSION_LEVEL,
FSP_FLAGS_WIDTH_ATOMIC_WRITES: Remove, because these flags do not
exist in the FSP_SPACE_FLAGS but only in memory.

fsp_flags_try_adjust(): New function, to adjust the FSP_SPACE_FLAGS
in page 0. Called by fil_open_single_table_tablespace(),
fil_space_for_table_exists_in_mem(), innobase_start_or_create_for_mysql()
except if --innodb-read-only is active.

fsp_flags_is_valid(ulint): Reimplement from the scratch, with
accurate comments. Do not display any details of detected
inconsistencies, because the output could be confusing when
dealing with MariaDB 10.1.x data files.

fsp_flags_convert_from_101(ulint): Convert flags from buggy
MariaDB 10.1.x format, or return ULINT_UNDEFINED if the flags
cannot be in MariaDB 10.1.x format.

fsp_flags_match(): Check the flags when probing files.
Implemented based on fsp_flags_is_valid()
and fsp_flags_convert_from_101().

dict_check_tablespaces_and_store_max_id(): Do not access the
page after committing the mini-transaction.

IMPORT TABLESPACE fixes:

AbstractCallback::init(): Convert the flags.

FetchIndexRootPages::operator(): Check that the tablespace flags match the
table flags. Do not attempt to convert tablespace flags to table flags,
because the conversion would necessarily be lossy.

PageConverter::update_header(): Write back the correct flags.
This takes care of the flags in IMPORT TABLESPACE.

contains a bad and a good copy

Clean up the InnoDB doublewrite buffer code.

buf_dblwr_init_or_load_pages(): Do not add empty pages to the buffer.

buf_dblwr_process(): Do consider changes to pages that are all zero.
Do not abort when finding a corrupted copy of a page in the doublewrite
buffer, because there could be multiple copies in the doublewrite buffer,
and only one of them needs to be good.

sometimes table->s->stored_fields is less than table->s->null_fields

safe_mutex: Found wrong usage of mutex 'LOCK_thread_count' and 'LOCK_status'
Mutex currently locked (in reverse order):
LOCK_status        sql/sql_class.h  line 3873
LOCK_thread_count  libmysqld/lib_sql.cc  line 432

Fixing Item::decimal_precision() to return at least one digit.
This fixes the problem reported in MDEV.

Also, fixing Item_func_signed::fix_length_and_dec() to reserve
space for at least one digit (plus one character for an optional sign).
This is needed to have CONVERT(expr,SIGNED) and CONVERT(expr,UNSIGNED)
create correct string fields when they appear in string context, e.g.:
  CREATE TABLE t1 AS SELECT CONCAT(CONVERT('',SIGNED));

Test crash recovery from an encrypted redo log with innodb_encrypt_log=0.
Previously, we did a clean shutdown, so only the log checkpoint
information would have been read from the redo log. With this change,
we will be reading and applying encrypted redo log records.

include/start_mysqld.inc: Observe $restart_parameters.

encryption.innodb-log-encrypt: Remove some unnecessary statements,
and instead of restarting the server and concurrently accessing
the files while the server is running, kill the server, check the
files, and finally start up the server.

innodb.log_data_file_size: Use start_mysqld.inc with $restart_parameters.

The symbol HAVE_VALGRIND_MEMCHECK_H was never defined.
Instead, the symbol HAVE_VALGRIND should have been used.

buf_flush_init_flush_rbt() was called too early in MariaDB server 10.0,
10.1, MySQL 5.5 and MySQL 5.6. The memory leak has been fixed in
the XtraDB storage engine and in MySQL 5.7.

As a result, when the server is started to initialize new data files,
the buf_pool->flush_rbt will be created unnecessarily and then leaked.
This memory leak was noticed in MariaDB server 10.1 when running the
test encryption.innodb_first_page.

        Have to use 'keyname' to check the name uniqueness.

Perform a slow shutdown at the start of the test, and create all
InnoDB tables with STATS_PERSISTENT=0, so that any I/O related to
background tasks (change buffer merge, purge, persistent statistics)
should be eliminated.

This should be a non-functional change. I was unable to repeat
MDEV-11626 innodb.innodb-change-buffer-recovery fails for xtradb
and cannot determine the reason for the failure without having access
to the files.

The repeatability of MDEV-11626 should not be affected by these changes.

MDEV-11317: `! is_set()' or `!is_set() || (m_status == DA_OK_BULK && is_bulk_op())' fails in Diagnostics_area::set_ok_status on CREATE OR REPLACE with ARCHIVE table

Problem was with deleting non existing .frm file for a storage engine that
doesn't have .frm files (yet)

Fixed by not giving an error for non existing .frm files for storage engines
that are using discovery
Fixed also valgrind supression related to the given test case

Sometimes innodb_data_file_size_debug was reported as INT UNSIGNED
instead of BIGINT UNSIGNED. Make it uint instead of ulong to get
a more deterministic result.

Add <install_root>/data/my.ini to the search path -  this my.ini location
is used since MariaDB 5.2

for the default installation.

It is now defined as "C:/Program Files/MariaDB ${MYSQL_BASE_VERSION}"
which is where installer indeed puts it by default.

It still does not cover every case -32bit installer on 64 bit Windows would put installation
root under  "C:/Program Files (x86)", but better than the path used
previously C:/MariaDB${MYSQL_BASE_VERSION}, which was never correct.

in default installation.

Added plugin-dir to the [client] section of the generated my.ini,
so that  installed services (MSI or mysql_install_db.exe) would be able to
find plugin directory.

MDEV-9084 Calling a stored function from a nested select from temporary table causes unpredictable behavior

Cherry-pick: f4a0af070ce49abae60040f6f32e1074309c27fb
Author: Dmitry Lenev <dmitry.lenev@oracle.com>
Date:   Mon Jul 25 16:06:52 2016 +0300

  Fix for bug #16672723 "CAN'T FIND TEMPORARY TABLE".

  Attempt to execute prepared CREATE TABLE SELECT statement which used
  temporary table in the subquery in FROM clause and stored function
  failed with unwarranted ER_NO_SUCH_TABLE error. The same happened
  when such statement was used in stored procedure and this procedure
  was re-executed.

  The problem occurred because execution of such prepared statement/its
  re-execution as part of stored procedure incorrectly set
  Query_table_list::query_tables_own_last marker, indicating the last
  table which is directly used by statement. As result temporary table
  used in the subquery was treated as indirectly used/belonging to
  prelocking list and was not pre-opened by open_temporary_tables()
  call before statement execution. Thus causing ER_NO_SUCH_TABLE errors
  since our code assumes that temporary tables need to be correctly
  pre-opened before statement execution.

  This problem became visible only in version 5.6 after patches related to
  bug 11746602/27480 "EXTEND CREATE TEMPORARY TABLES PRIVILEGE TO ALLOW
  TEMP TABLE OPERATIONS" since they have introduced pre-opening of temporary
  tables for statements.

  Incorrect setting of Query_table_list::query_tables_own_last happened
  in LEX::first_lists_tables_same() method which is called by CREATE TABLE
  SELECT implementation as part of LEX::unlink_first_table(), which temporary
  excludes table list element for table being created from the query table
  list before handling SELECT part.

  LEX::first_lists_tables_same() tries to ensure that global table list of
  the statement starts with the first table list element from the first
  statement select. To do this it moves such table list element to the head
  of the global table list. If this table happens to be last directly-used
  table for the statement, query_tables_own_last marker is pointing to it.
  Since this marker was not updated when table list element was moved we
  ended up with all tables except the first table separated by it as if
  they were not directly used by statement (i.e. belonged to prelocked
  tables list).

  This fix changes code of LEX::first_lists_tables_same() to update
  query_tables_own_last marker in cases when it points to the table
  being moved. It is set to the table which precedes table being moved
  in this case.

Make the slave SQL thread always output to the error log the message "Slave
SQL thread exiting, replication stopped in ..." whenever it previously
outputted "Slave SQL thread initialized, starting replication ...".

Before this patch, it was somewhat inconsistent in which cases the message
would be output and in which not, depending on the exact time and cause of
the condition that caused the SQL thread to stop.

MTR raises default wait_for_pos_timeout from 300 to 1500 when tests
are run with valgrind. The same needs to be done for other
replication-related waits.

The change should fix one of failures mentioned in MDEV-10653
(rpl.rpl_parallel fails in buildbot with timeout), the one
on the valgrind builder; but not all of them

Add diagnostics output if any Sphinx components aren't found

Memory was leaked when ALTER TABLE is attempted on a table
that contains corrupted indexes.
The memory leak was reported by AddressSanitizer for the test
innodb.innodb_corrupt_bit. The leak was introduced into
MariaDB Server 10.0.26, 10.1.15, 10.2.1 by the following:

commit c081c978
Merge: 1d21b221 a482e76e
Author: Sergei Golubchik <serg@mariadb.org>
Date:   Tue Jun 21 14:11:02 2016 +0200

   Merge branch '5.5' into bb-10.0

In the backport of Bug#24450908 UNDO LOG EXISTS AFTER SLOW SHUTDOWN
from MySQL 5.7 to the MySQL 5.6 based MariaDB Server 10.1, we must
use a mutex when HAVE_ATOMIC_BUILTINS is not defined.

Also, correct a function comment. In MySQL 5.6 and MariaDB Server 10.1,
also temporary InnoDB tables are redo-logged.

encryption.innodb_scrub: Clean up. Make it also cover ROW_FORMAT=COMPRESSED,
removing the need for encryption.innodb_scrub_compressed.
Add a FIXME comment saying that we should create a secondary index, to
demonstrate that also undo log pages get scrubbed. Currently that is
not working!

Also clean up encryption.innodb_scrub_background, but keep it disabled,
because the background scrubbing does not work reliably.

Fix both tests so that if something is not scrubbed, the test will be
aborted, so that the data files will be preserved. Allow the tests to
run on Windows as well.

InnoDB shutdown failed to properly take fil_crypt_thread() into account.
The encryption threads were signalled to shut down together with other
non-critical tasks. This could be much too early in case of slow shutdown,
which could need minutes to complete the purge. Furthermore, InnoDB
failed to wait for the fil_crypt_thread() to actually exit before
proceeding to the final steps of shutdown, causing the race conditions.

Furthermore, the log_scrub_thread() was shut down way too early.
Also it should remain until the SRV_SHUTDOWN_FLUSH_PHASE.

fil_crypt_threads_end(): Remove. This would cause the threads to
be terminated way too early.

srv_buf_dump_thread_active, srv_dict_stats_thread_active,
lock_sys->timeout_thread_active, log_scrub_thread_active,
srv_monitor_active, srv_error_monitor_active: Remove a race condition
between startup and shutdown, by setting these in the startup thread
that creates threads, not in each created thread. In this way, once the
flag is cleared, it will remain cleared during shutdown.

srv_n_fil_crypt_threads_started, fil_crypt_threads_event: Declare in
global rather than static scope.

log_scrub_event, srv_log_scrub_thread_active, log_scrub_thread():
Declare in static rather than global scope. Let these be created by
log_init() and freed by log_shutdown().

rotate_thread_t::should_shutdown(): Do not shut down before the
SRV_SHUTDOWN_FLUSH_PHASE.

srv_any_background_threads_are_active(): Remove. These checks now
exist in logs_empty_and_mark_files_at_shutdown().

logs_empty_and_mark_files_at_shutdown(): Shut down the threads in
the proper order. Keep fil_crypt_thread() and log_scrub_thread() alive
until SRV_SHUTDOWN_FLUSH_PHASE, and check that they actually terminate.

Port a bug fix from MySQL 5.7, so that all undo log pages will be freed
during a slow shutdown. We cannot scrub pages that are left allocated.

commit 173e171c6fb55f064eea278c76fbb28e2b1c757b
Author: Thirunarayanan Balathandayuthapani <thirunarayanan.balathandayuth@oracle.com>
Date:   Fri Sep 9 18:01:27 2016 +0530

    Bug #24450908   UNDO LOG EXISTS AFTER SLOW SHUTDOWN

    Problem:
    ========

    1) cached undo segment is not removed from rollback segment history
    (RSEG_HISTORY) during slow shutdown. In other words, If the segment is
    not completely free, we are failing to remove an entry from the history
    list. While starting the server, we traverse all rollback segment slots
    history list and make it as list of undo logs to be purged in purge
    queue.
    In that case, purge queue will never be empty after slow shutdown.

    2) Freeing of undo log segment is linked with removing undo log header
    from history.

    Fix:
    ====
    1) Have separate logic of removing the undo log header from
    history list from rollback segment slots and remove it from
    rollback segment history even though it is not completely free.
Reviewed-by: Debarun Banerjee <debarun.banerjee@oracle.com>
Reviewed-by: Marko Mäkelä <marko.makela@oracle.com>
    RB:13672

- fix the test to avoid false-negatives before MDEV-5114 patch;
- fix the race condition which made the test fail on slow builders

Ability to print lock type added.
Restoring correct lock type for CREATE VIEW added.

MariaDB Server 10.0.28 and 10.1.19 merged code from Percona XtraDB
that introduced support for compressed columns. Much but not all
of this code was disabled by placing #ifdef HAVE_PERCONA_COMPRESSED_COLUMNS
around it.

Among the unused but not disabled code is code to access
some new system tables related to compressed columns.

The creation of these system tables SYS_ZIP_DICT and SYS_ZIP_DICT_COLS
would cause a crash in --innodb-read-only mode when upgrading
from an earlier version to 10.0.28 or 10.1.19.

Let us remove all the dead code related to compressed columns.
Users who already upgraded to 10.0.28 and 10.1.19 will have the two
above mentioned empty tables in their InnoDB system tablespace.
Subsequent versions of MariaDB Server will completely ignore those tables.

fil_crypt_threads_cleanup(): Do nothing if nothing was initialized.

after aborted InnoDB startup

This bug was repeatable by starting MariaDB 10.2 with an
invalid option, such as --innodb-flush-method=foo.
It is not repeatable in MariaDB 10.1 in the same way, but the
problem exists already there.