MDEV-26915: SST scripts do not take log_bin_index setting into account

Currently, SST scripts assume that the filename specified in
the --log-bin-index argument either does not contain an extension
or uses the standard ".index" extension. Similar assumptions are
used for the log_bin_index parameter read from the configuration
file. This commit adds support for arbitrary extensions for the
index file paths.

mysql-test/suite/galera/r/galera_log_bin_ext.result

+connection node_2;
+connection node_1;
+connection node_1;
+set global wsrep_on=OFF;
+reset master;
+set global wsrep_on=ON;
+connection node_2;
+set global wsrep_on=OFF;
+reset master;
+set global wsrep_on=ON;
+CREATE TABLE t1 (id INT PRIMARY KEY) ENGINE=InnoDB;
+INSERT INTO t1 VALUES (1);
+CREATE TABLE t2 (id INT) ENGINE=InnoDB;
+INSERT INTO t2 VALUES (1);
+INSERT INTO t2 VALUES (1);
+connection node_2;
+SELECT COUNT(*) = 1 FROM t1;
+COUNT(*) = 1
+1
+SELECT COUNT(*) = 2 FROM t2;
+COUNT(*) = 2
+1
+connection node_1;
+ALTER TABLE t1 ADD COLUMN f2 INTEGER;
+include/show_binlog_events.inc
+Log_name	Pos	Event_type	Server_id	End_log_pos	Info
+hostname1-bin.000001	#	Gtid	#	#	GTID #-#-#
+hostname1-bin.000001	#	Query	#	#	use `test`; CREATE TABLE t1 (id INT PRIMARY KEY) ENGINE=InnoDB
+hostname1-bin.000001	#	Gtid	#	#	BEGIN GTID #-#-#
+hostname1-bin.000001	#	Annotate_rows	#	#	INSERT INTO t1 VALUES (1)
+hostname1-bin.000001	#	Table_map	#	#	table_id: # (test.t1)
+hostname1-bin.000001	#	Write_rows_v1	#	#	table_id: # flags: STMT_END_F
+hostname1-bin.000001	#	Xid	#	#	COMMIT /* XID */
+hostname1-bin.000001	#	Gtid	#	#	GTID #-#-#
+hostname1-bin.000001	#	Query	#	#	use `test`; CREATE TABLE t2 (id INT) ENGINE=InnoDB
+hostname1-bin.000001	#	Gtid	#	#	BEGIN GTID #-#-#
+hostname1-bin.000001	#	Annotate_rows	#	#	INSERT INTO t2 VALUES (1)
+hostname1-bin.000001	#	Table_map	#	#	table_id: # (test.t2)
+hostname1-bin.000001	#	Write_rows_v1	#	#	table_id: # flags: STMT_END_F
+hostname1-bin.000001	#	Xid	#	#	COMMIT /* XID */
+hostname1-bin.000001	#	Gtid	#	#	BEGIN GTID #-#-#
+hostname1-bin.000001	#	Annotate_rows	#	#	INSERT INTO t2 VALUES (1)
+hostname1-bin.000001	#	Table_map	#	#	table_id: # (test.t2)
+hostname1-bin.000001	#	Write_rows_v1	#	#	table_id: # flags: STMT_END_F
+hostname1-bin.000001	#	Xid	#	#	COMMIT /* XID */
+hostname1-bin.000001	#	Gtid	#	#	GTID #-#-#
+hostname1-bin.000001	#	Query	#	#	use `test`; ALTER TABLE t1 ADD COLUMN f2 INTEGER
+connection node_2;
+SELECT COUNT(*) = 2 FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = 't1';
+COUNT(*) = 2
+1
+include/show_binlog_events.inc
+Log_name	Pos	Event_type	Server_id	End_log_pos	Info
+hostname1-bin.000001	#	Gtid	#	#	GTID #-#-#
+hostname1-bin.000001	#	Query	#	#	use `test`; CREATE TABLE t1 (id INT PRIMARY KEY) ENGINE=InnoDB
+hostname1-bin.000001	#	Gtid	#	#	BEGIN GTID #-#-#
+hostname1-bin.000001	#	Annotate_rows	#	#	INSERT INTO t1 VALUES (1)
+hostname1-bin.000001	#	Table_map	#	#	table_id: # (test.t1)
+hostname1-bin.000001	#	Write_rows_v1	#	#	table_id: # flags: STMT_END_F
+hostname1-bin.000001	#	Xid	#	#	COMMIT /* XID */
+hostname1-bin.000001	#	Gtid	#	#	GTID #-#-#
+hostname1-bin.000001	#	Query	#	#	use `test`; CREATE TABLE t2 (id INT) ENGINE=InnoDB
+hostname1-bin.000001	#	Gtid	#	#	BEGIN GTID #-#-#
+hostname1-bin.000001	#	Annotate_rows	#	#	INSERT INTO t2 VALUES (1)
+hostname1-bin.000001	#	Table_map	#	#	table_id: # (test.t2)
+hostname1-bin.000001	#	Write_rows_v1	#	#	table_id: # flags: STMT_END_F
+hostname1-bin.000001	#	Xid	#	#	COMMIT /* XID */
+hostname1-bin.000001	#	Gtid	#	#	BEGIN GTID #-#-#
+hostname1-bin.000001	#	Annotate_rows	#	#	INSERT INTO t2 VALUES (1)
+hostname1-bin.000001	#	Table_map	#	#	table_id: # (test.t2)
+hostname1-bin.000001	#	Write_rows_v1	#	#	table_id: # flags: STMT_END_F
+hostname1-bin.000001	#	Xid	#	#	COMMIT /* XID */
+hostname1-bin.000001	#	Gtid	#	#	GTID #-#-#
+hostname1-bin.000001	#	Query	#	#	use `test`; ALTER TABLE t1 ADD COLUMN f2 INTEGER
+DROP TABLE t1;
+DROP TABLE t2;
+#cleanup
+connection node_1;
+SET GLOBAL wsrep_on=OFF;
+RESET MASTER;

mysql-test/suite/galera/t/galera_log_bin_ext.cnf

+!include ../galera_2nodes.cnf
+
+[mysqld.1]
+log-bin = hostname1-bin
+log-bin-index = hostname1.bdx
+log-slave-updates
+
+[mysqld.2]
+log-bin = hostname2-bin
+log-bin-index = hostname2.bdx
+log-slave-updates

mysql-test/suite/galera/t/galera_log_bin_ext.test

+--source galera_log_bin.inc

scripts/wsrep_sst_common.sh

@@ -230,7 +230,7 @@ case "$1" in
         shift
         ;;
     '--binlog-index'|'--log-bin-index')
-        readonly WSREP_SST_OPT_BINLOG_INDEX="$2"
+        WSREP_SST_OPT_BINLOG_INDEX="$2"
         shift
         ;;
     '--log-basename')
@@ -453,7 +453,7 @@ if [ -n "${MYSQLD_OPT_LOG_BIN:-}" -a \
 fi
 if [ -n "${MYSQLD_OPT_LOG_BIN_INDEX:-}" -a \
      -z "$WSREP_SST_OPT_BINLOG_INDEX" ]; then
-    readonly WSREP_SST_OPT_BINLOG_INDEX="$MYSQLD_OPT_LOG_BIN_INDEX"
+    WSREP_SST_OPT_BINLOG_INDEX="$MYSQLD_OPT_LOG_BIN_INDEX"
 fi
 if [ -n "${MYSQLD_OPT_DATADIR:-}" -a \
      -z "$WSREP_SST_OPT_DATA" ]; then
@@ -563,6 +563,16 @@ get_binlog()
                 # is already defined above):
                 readonly WSREP_SST_OPT_BINLOG_INDEX="$WSREP_SST_OPT_BINLOG.index"
             fi
+        else
+            # Remove all directories from the index file path:
+            local filename="${WSREP_SST_OPT_BINLOG_INDEX##*/}"
+            # Check if the index file name contains the extension:
+            if [ "${filename%.*}" = "$filename" ]; then
+                # Let's add the default extension (".index"):
+                readonly WSREP_SST_OPT_BINLOG_INDEX="$WSREP_SST_OPT_BINLOG_INDEX.index"
+            else
+                readonly WSREP_SST_OPT_BINLOG_INDEX
+            fi
         fi
     fi
 }

scripts/wsrep_sst_mariabackup.sh

@@ -1249,8 +1249,8 @@ then
             cd "$binlog_dir"
             wsrep_log_info "Cleaning the binlog directory $binlog_dir as well"
             rm -fv "$WSREP_SST_OPT_BINLOG".[0-9]* 1>&2 \+ || true
-            binlog_index="${WSREP_SST_OPT_BINLOG_INDEX%.index}.index"
-            [ -f "$binlog_index" ] && rm -fv "$binlog_index" 1>&2 \+ || true
+            [ -f "$WSREP_SST_OPT_BINLOG_INDEX" ] && \
+                rm -fv "$WSREP_SST_OPT_BINLOG_INDEX" 1>&2 \+ || true
             cd "$OLD_PWD"
         fi
 
@@ -1325,7 +1325,7 @@ then
 
             cd "$BINLOG_DIRNAME"
             for bfile in $(ls -1 "$BINLOG_FILENAME".[0-9]*); do
-                echo "$BINLOG_DIRNAME/$bfile" >> "${WSREP_SST_OPT_BINLOG_INDEX%.index}.index"
+                echo "$BINLOG_DIRNAME/$bfile" >> "$WSREP_SST_OPT_BINLOG_INDEX"
             done
             cd "$OLD_PWD"
 

scripts/wsrep_sst_rsync.sh

@@ -392,7 +392,7 @@ EOF
             # Prepare binlog files
             cd "$BINLOG_DIRNAME"
 
-            binlog_files_full=$(tail -n $BINLOG_N_FILES "${WSREP_SST_OPT_BINLOG_INDEX%.index}.index")
+            binlog_files_full=$(tail -n $BINLOG_N_FILES "$WSREP_SST_OPT_BINLOG_INDEX")
 
             binlog_files=""
             for ii in $binlog_files_full
@@ -732,7 +732,7 @@ EOF
         if [ -f "$BINLOG_TAR_FILE" ]; then
             cd "$BINLOG_DIRNAME"
 
-            binlog_index="${WSREP_SST_OPT_BINLOG_INDEX%.index}.index"
+            binlog_index="$WSREP_SST_OPT_BINLOG_INDEX"
 
             # Clean up old binlog files first
             rm -f "$BINLOG_FILENAME".[0-9]*