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b80df9eba2
buf_read_ibuf_merge_pages(): Discard any page numbers that are outside the current bounds of the tablespace, by invoking the function ibuf_delete_recs() that was introduced in MDEV-20934. This could avoid an infinite change buffer merge loop on innodb_fast_shutdown=0, because normally the change buffer merge would only be attempted if a page was successfully loaded into the buffer pool. dict_drop_index_tree(): Add the parameter trx_t*. To prevent the DROP TABLE crash, do not invoke btr_free_if_exists() if the entire .ibd file will be dropped. Thus, we will avoid a crash if the BTR_SEG_LEAF or BTR_SEG_TOP of the index is corrupted, and we will also avoid unnecessarily accessing the to-be-dropped tablespace via the buffer pool. In MariaDB 10.2, we disable the DROP TABLE fix if innodb_safe_truncate=0, because the backup-unsafe MySQL 5.7 WL#6501 form of TRUNCATE TABLE requires that the individual pages be freed inside the tablespace.
107 lines
3.8 KiB
Plaintext
107 lines
3.8 KiB
Plaintext
--source include/have_innodb.inc
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# innodb_change_buffering_debug option is debug only
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--source include/have_debug.inc
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# Embedded server tests do not support restarting
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--source include/not_embedded.inc
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# The test is not big enough to use change buffering with larger page size.
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--source include/have_innodb_max_16k.inc
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--disable_query_log
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call mtr.add_suppression("InnoDB: Failed to find tablespace for table `test`\\.`t1` in the cache\\. Attempting to load the tablespace with space id");
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call mtr.add_suppression("InnoDB: Allocated tablespace ID \\d+ for test.t1, old maximum was");
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--enable_query_log
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CREATE TABLE t1(
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a INT AUTO_INCREMENT PRIMARY KEY,
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b CHAR(1),
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c INT,
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INDEX(b))
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ENGINE=InnoDB STATS_PERSISTENT=0;
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# The flag innodb_change_buffering_debug is only available in debug builds.
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# It instructs InnoDB to try to evict pages from the buffer pool when
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# change buffering is possible, so that the change buffer will be used
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# whenever possible.
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SET GLOBAL innodb_change_buffering_debug = 1;
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# Create enough rows for the table, so that the change buffer will be
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# used for modifying the secondary index page. There must be multiple
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# index pages, because changes to the root page are never buffered.
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INSERT INTO t1 VALUES(0,'x',1);
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INSERT INTO t1 SELECT 0,b,c FROM t1;
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INSERT INTO t1 SELECT 0,b,c FROM t1;
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INSERT INTO t1 SELECT 0,b,c FROM t1;
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INSERT INTO t1 SELECT 0,b,c FROM t1;
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INSERT INTO t1 SELECT 0,b,c FROM t1;
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INSERT INTO t1 SELECT 0,b,c FROM t1;
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INSERT INTO t1 SELECT 0,b,c FROM t1;
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INSERT INTO t1 SELECT 0,b,c FROM t1;
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INSERT INTO t1 SELECT 0,b,c FROM t1;
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INSERT INTO t1 SELECT 0,b,c FROM t1;
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INSERT INTO t1 SELECT 0,b,c FROM t1;
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INSERT INTO t1 SELECT 0,b,c FROM t1;
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let MYSQLD_DATADIR=`select @@datadir`;
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let PAGE_SIZE=`select @@innodb_page_size`;
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--source include/shutdown_mysqld.inc
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# Corrupt the change buffer bitmap, to claim that pages are clean
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perl;
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do "$ENV{MTR_SUITE_DIR}/include/crc32.pl";
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my $file = "$ENV{MYSQLD_DATADIR}/test/t1.ibd";
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open(FILE, "+<$file") || die "Unable to open $file";
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binmode FILE;
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my $ps= $ENV{PAGE_SIZE};
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my $page;
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sysseek(FILE, $ps, 0) || die "Unable to seek $file\n";
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die "Unable to read $file" unless sysread(FILE, $page, $ps) == $ps;
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# Clean the change buffer bitmap.
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substr($page,38,$ps - 38 - 8) = chr(0) x ($ps - 38 - 8);
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my $polynomial = 0x82f63b78; # CRC-32C
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my $ck= pack("N",mycrc32(substr($page, 4, 22), 0, $polynomial) ^
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mycrc32(substr($page, 38, $ps - 38 - 8), 0, $polynomial));
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substr($page,0,4)=$ck;
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substr($page,$ps-8,4)=$ck;
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sysseek(FILE, $ps, 0) || die "Unable to rewind $file\n";
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syswrite(FILE, $page, $ps)==$ps || die "Unable to write $file\n";
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close(FILE) || die "Unable to close $file";
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EOF
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--let $restart_parameters= --innodb-force-recovery=6 --innodb-change-buffer-dump
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--source include/start_mysqld.inc
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--replace_regex /contains \d+ entries/contains #### entries/
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check table t1;
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--source include/shutdown_mysqld.inc
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# Truncate the file to 5 pages, as if it were empty
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perl;
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do "$ENV{MTR_SUITE_DIR}/include/crc32.pl";
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my $file = "$ENV{MYSQLD_DATADIR}/test/t1.ibd";
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open(FILE, "+<$file") || die "Unable to open $file";
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binmode FILE;
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my $ps= $ENV{PAGE_SIZE};
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my $pages=5;
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my $page;
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die "Unable to read $file" unless sysread(FILE, $page, $ps) == $ps;
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substr($page,46,4)=pack("N", $pages);
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my $polynomial = 0x82f63b78; # CRC-32C
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my $ck= pack("N",mycrc32(substr($page, 4, 22), 0, $polynomial) ^
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mycrc32(substr($page, 38, $ps - 38 - 8), 0, $polynomial));
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substr($page,0,4)=$ck;
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substr($page,$ps-8,4)=$ck;
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sysseek(FILE, 0, 0) || die "Unable to rewind $file\n";
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syswrite(FILE, $page, $ps)==$ps || die "Unable to write $file\n";
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truncate(FILE, $ps * $pages);
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close(FILE) || die "Unable to close $file";
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EOF
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--let $restart_parameters=
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--source include/start_mysqld.inc
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SET GLOBAL innodb_fast_shutdown=0;
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--source include/restart_mysqld.inc
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# Cleanup
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DROP TABLE t1;
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