- This is caused by merge commit a26e7a37.
InnoDB fails to fetch the next index field when there is a externally
stored column length check involved.

In commit 118e258a (part of MDEV-23855)
we inadvertently broke crash recovery, reintroducing MDEV-11556.

fil_system_t::extend_to_recv_size(): Extend all open tablespace files
to the recovered size.

recv_sys_t::apply(): Invoke fil_system.extend_to_recv_size() at the
start of each batch. In this way, any fil_space_t::recv_size
changes that were parsed after the file was opened will be applied.

page_apply_insert_redundant(): Replace a too strict condition
hdr_c > pextra_size. It turns out that page_cur_insert_rec_low()
is not even computing the extra_size of cur->rec when it is trying
to reuse header bytes of the preceding record.

MDEV-25105 (commit 7a4fbb55)
in MariaDB 10.6 will refuse the innodb_checksum_algorithm
values none, innodb, strict_none, strict_innodb.

We will issue a deprecation warning if innodb_checksum_algorithm
is set to any of these non-default unsafe values.

innodb_checksum_algorithm=crc32 was made the default in
MySQL 5.7 and MariaDB Server 10.2, and given that older versions
of the server have reached their end of life, there is no valid
reason to use anything else than innodb_checksum_algorithm=crc32
or innodb_checksum_algorithm=strict_crc32 in MariaDB 10.3.

Reviewed by: Sergei Golubchik

- Currently page cleaner thread will stop flushing if
  dirty_pct < innodb_max_dirty_pages_pct_lwm.

- If the server is not performing any activity then said resources/time
  could be used to flush the pending dirty pages and keep buffer pool
  clean for the next burst of the cycle. This flushing is called idle flushing.

- flushing logic underwent a complete revamp in 10.5.7/8
  and as part of the revamp idle flushing logic got removed.

- New proposed logic of idle flushing is based on updated logic of the
  page cleaner that will enable idle flushing if
  - buf page cleaner is idle
  - there are dirty pages (< innodb_max_dirty_pages_pct_lwm)
  - server is not performing any activity

  Logic will kickstart the idle flushing bounded by innodb_io_capacity.

(Thanks to Marko Makela for reviewing the patch and idea
 right from the its inception).

It was possibile for a user to create an interlocked state which may go on
for a significant period of time. There is a tight loop in the FTWRL code
path that tries to repeatedly acquire a read lock. As the weight of FTWRL
lock is the smallest among others, it's always selected by the deadlock
detector, but can never be killed.

Imaging the following sequence:

    connection_0                 connection_1

 GET_LOCK("l1", 0);
                             LOCK TABLES t WRITE;
 FLUSH TABLES WITH READ LOCK;
                             GET_LOCK("l1", 1000);

The GET_LOCK statement in connection_1 triggers the deadlock detector,
which tries to select the lock in FTWRL, since its weight is 0. However,
since a loop in Global_read_lock::lock_global_read_lock() tries to always
win, it tries to acquire lock again. Which invokes the deadlock detector,
and that cycle continues until GET_LOCK in connection_1 times out.

This patch resolves the live-locking by introducing a dynamic bonus to the
deadlock weight associated with every lock. Each lock gets a bonus weight
each time it's selected by the deadlock detector. In case of a live-lock
situation, those locks that cannot be killed, get additional weight each
iteration. Eventually their weight becomes so high that the deadlock
detector shifts its attention to other lock, until it find the one that
can be killed.

The problem was that the CONNECT engine is trying to open the .frm file
during drop_table(), which the code did not take into account.
Fixed by adding the HA_REUSES_FILE_NAMES table flag to CONNECT.

Other things:
- Fixed a wrong test of HA_REUSE_FILE_NAMES of in mysql_alter_table()
  (Comment was correct, no the code)
- Added a test in the connect engine that if the .frm it tries to use in
  delete is not made for connect, it will generate an error instead of
  crash.

Do not use --source directive as we don't want to load the plugin when
the test starts.

InnoDB set the space in dict_table_t as NULL when table
is discarded. So InnoDB shouldn't use the space present
in table to detect whether the given tablespace is
temporary tablespace.

- Reduce Build-Depends
  https://salsa.debian.org/mariadb-team/mariadb-10.5/-/commit/150bf990c6059a2fca95ea9bc4d108c9789b179d

  Dependencies chrpath, dh-apparmor and libarchive-dev are not needed.
  Fixes buildbot sid failures that error on:
    Unmet build dependencies: chrpath dh-apparmor libarchive-dev

- Salsa-CI: Remove mysql-5.7 upgrade in Sid test as package was removed
  https://salsa.debian.org/mariadb-team/mariadb-10.5/-/commit/6f55ac620ce26046475b2a430838367732b47d54

  Also clean away extra Salsa-CI markup not needed anymore.

- Autopkgtest: Simplify autopkgtest 'smoke' to be easier to debug
  https://salsa.debian.org/mariadb-team/mariadb-10.5/-/commit/836907989ad8d355b2f88f8013a6acb8a64cf7d9

- Autopkgtest: Skip main.failed_auth_unixsocket on armhf and i386
  https://salsa.debian.org/mariadb-team/mariadb-10.5/-/commit/74601f8b31a6c59e825089c52a1ca21545062813

		failed in dtuple_convert_big_rec

In dtuple_convert_big_rec(), InnoDB fails to consider the
instant metadata blob while choosing the variable length
field.

implements in a native way get_exepath which gives reliably the full
path.

MDEV-24868 Server crashes in optimize_schema_tables_memory_usage after select from information_schema.innodb_sys_columns

optimize_schema_tables_memory_usage() crashed when its argument included
TABLE struct that was not fully initialized.

To prevent such a crash, we check if a table is an information schema table at
the beginning of each iteration.

Closes #1768

not be dropped if the DEFINER is custom. Revert changes
to MDEV-23102 tests as they were designed to catch
this corner case.
The explanation for this corner case is that users
historically used to tweak the mysql.user table and
probably still do even though mysql.user is now a view.
Thus, if the DEFINER of the view is not default, i.e.
root@localhost or mariadb.sys@localhost, we should avoid
dropping the view during upgrade process to not discard
potential custom changes.

if a query used no fields from an I_S table, we were creating a temp
table with one, first, field (as a table cannot have zero fields),
with its length truncated to 1.

Now - force also this dummy field to be a normal field, not a BLOB

don't use `result` both for an error status and to remember
if the mutex was locked

if it's the whole content of a test anyway.

view definition in tests as it wastes lots of time when they fail
for minor fixes like adding/changing a new column in the view, also
it's less code

The mysql.user view password_expired column should display the right
result, in sync with whether an account has its password expired or not

For mariadb 10.4+ upgrades before this commit, the mysql.user view needs
to be dropped and recreated to actually make the view display the
correct value for the password_expired column.

This is fixup for commit f06a0b53.

Since we do not stop at corrupted page error, there is no reason to log
a backup error.