remerging wsrep files from lp:codership-mysql

BUILD/compile-amd64-debug-wsrep

+#! /bin/sh
+
+path=`dirname $0`
+. "$path/SETUP.sh"
+
+extra_flags="$amd64_cflags $debug_cflags -g -O0 $wsrep_cflags"
+c_warnings="$c_warnings $debug_extra_warnings"
+cxx_warnings="$cxx_warnings $debug_extra_warnings"
+extra_configs="$amd64_configs $debug_configs $wsrep_configs --with-wsrep"
+
+. "$path/FINISH.sh"

BUILD/compile-amd64-wsrep

+#! /bin/sh
+
+path=`dirname $0`
+. "$path/SETUP.sh"
+
+extra_flags="$amd64_cflags $fast_cflags -g $wsrep_cflags"
+extra_configs="$amd64_configs $wsrep_configs --with-wsrep"
+
+. "$path/FINISH.sh"

BUILD/compile-pentium-debug-wsrep

+#! /bin/sh -x
+
+path=`dirname $0`
+set -- "$@" --with-debug=full
+. "$path/SETUP.sh"
+
+extra_flags="$pentium_cflags $debug_cflags -g -O0 $wsrep_cflags"
+c_warnings="$c_warnings $debug_extra_warnings"
+cxx_warnings="$cxx_warnings $debug_extra_warnings"
+extra_configs="$pentium_configs $debug_configs $wsrep_configs --with-wsrep"
+
+. "$path/FINISH.sh"

BUILD/compile-pentium-wsrep

+#! /bin/sh
+
+path=`dirname $0`
+. "$path/SETUP.sh"
+
+extra_flags="$pentium_cflags $fast_cflags $wsrep_cflags"
+extra_configs="$pentium_configs $wsrep_configs --with-wsrep"
+
+#strip=yes
+
+. "$path/FINISH.sh"

BUILD/compile-pentium64-wsrep

+#! /bin/sh
+
+# Copyright (C) 2006, 2007 MySQL AB
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Library General Public
+# License as published by the Free Software Foundation; version 2
+# of the License.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Library General Public License for more details.
+#
+# You should have received a copy of the GNU Library General Public
+# License along with this library; if not, write to the Free
+# Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+# MA 02111-1307, USA
+
+path=`dirname $0`
+. "$path/SETUP.sh"
+
+extra_flags="$pentium64_cflags $fast_cflags -g $wsrep_cflags"
+extra_configs="$pentium_configs $static_link $wsrep_configs --with-wsrep"
+CC="$CC --pipe"
+strip=yes
+
+. "$path/FINISH.sh"

cmake/wsrep.cmake

+# Copyright (c) 2011, Codership Oy <info@codership.com>.
+# 
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; version 2 of the License.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA 
+
+# We need to generate a proper spec file even without --with-wsrep flag,
+# so WSREP_VERSION is produced regardless
+
+# Set the patch version
+SET(WSREP_PATCH_VERSION "7")
+
+# Obtain patch revision number
+SET(WSREP_PATCH_REVNO $ENV{WSREP_REV})
+IF(NOT WSREP_PATCH_REVNO)
+  EXECUTE_PROCESS(
+    COMMAND bzr revno
+    OUTPUT_VARIABLE WSREP_PATCH_REVNO
+    RESULT_VARIABLE RESULT
+  )
+STRING(REGEX REPLACE "(\r?\n)+$" "" WSREP_PATCH_REVNO "${WSREP_PATCH_REVNO}")
+#FILE(WRITE "wsrep_config" "Debug: WSREP_PATCH_REVNO result: ${RESULT}\n")
+ENDIF()
+IF(NOT WSREP_PATCH_REVNO)
+  SET(WSREP_PATCH_REVNO "XXXX")
+ENDIF()
+
+# Obtain wsrep API version
+EXECUTE_PROCESS(
+  COMMAND sh -c "grep WSREP_INTERFACE_VERSION ${MySQL_SOURCE_DIR}/wsrep/wsrep_api.h | cut -d '\"' -f 2"
+  OUTPUT_VARIABLE WSREP_API_VERSION
+  RESULT_VARIABLE RESULT
+)
+#FILE(WRITE "wsrep_config" "Debug: WSREP_API_VERSION result: ${RESULT}\n")
+STRING(REGEX REPLACE "(\r?\n)+$" "" WSREP_API_VERSION "${WSREP_API_VERSION}")
+
+SET(WSREP_VERSION
+    "${WSREP_API_VERSION}.${WSREP_PATCH_VERSION}.r${WSREP_PATCH_REVNO}"
+)
+
+OPTION(WITH_WSREP "WSREP replication API (to use, e.g. Galera Replication library)" OFF)
+IF (WITH_WSREP)
+  SET(WSREP_C_FLAGS   "-DWITH_WSREP -DWSREP_PROC_INFO -DMYSQL_MAX_VARIABLE_VALUE_LEN=2048")
+  SET(CMAKE_C_FLAGS   "${CMAKE_C_FLAGS} ${WSREP_C_FLAGS}")
+  SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${WSREP_C_FLAGS}")
+  SET(COMPILATION_COMMENT "${COMPILATION_COMMENT}, wsrep_${WSREP_VERSION}")
+  SET(WITH_EMBEDDED_SERVER OFF)
+ENDIF()
+
+#

scripts/wsrep_sst_common.sh

+# Copyright (C) 2010 Codership Oy
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; version 2 of the License.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; see the file COPYING. If not, write to the
+# Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston
+# MA  02110-1301  USA.
+
+# This is a common command line parser to be sourced by other SST scripts
+
+set -u
+
+WSREP_SST_OPT_BYPASS=0
+
+while [ $# -gt 0 ]; do
+case "$1" in
+    '--address')
+        readonly WSREP_SST_OPT_ADDR="$2"
+        shift
+        ;;
+    '--auth')
+        readonly WSREP_SST_OPT_AUTH="$2"
+        shift
+        ;;
+    '--bypass')
+        WSREP_SST_OPT_BYPASS=1
+        ;;
+    '--datadir')
+        readonly WSREP_SST_OPT_DATA="$2"
+        shift
+        ;;
+    '--defaults-file')
+        readonly WSREP_SST_OPT_CONF="$2"
+        shift
+        ;;
+    '--host')
+        readonly WSREP_SST_OPT_HOST="$2"
+        shift
+        ;;
+    '--local-port')
+        readonly WSREP_SST_OPT_LPORT="$2"
+        shift
+        ;;
+    '--parent')
+        readonly WSREP_SST_OPT_PARENT="$2"
+        shift
+        ;;
+    '--password')
+        readonly WSREP_SST_OPT_PSWD="$2"
+        shift
+        ;;
+    '--port')
+        readonly WSREP_SST_OPT_PORT="$2"
+        shift
+        ;;
+    '--role')
+        readonly WSREP_SST_OPT_ROLE="$2"
+        shift
+        ;;
+    '--socket')
+        readonly WSREP_SST_OPT_SOCKET="$2"
+        shift
+        ;;
+    '--user')
+        readonly WSREP_SST_OPT_USER="$2"
+        shift
+        ;;
+    '--gtid')
+        readonly WSREP_SST_OPT_GTID="$2"
+        shift
+        ;;
+    *) # must be command
+       # usage
+       # exit 1
+       ;;
+esac
+shift
+done
+readonly WSREP_SST_OPT_BYPASS
+
+wsrep_log()
+{
+    # echo everything to stderr so that it gets into common error log
+    # deliberately made to look different from the rest of the log
+    local readonly tst="$(date +%Y%m%d\ %H:%M:%S.%N | cut -b -21)"
+    echo "WSREP_SST: $* ($tst)" >>/dev/stderr
+}
+
+wsrep_log_error()
+{
+    wsrep_log "[ERROR] $*"
+}
+
+wsrep_log_info()
+{
+    wsrep_log "[INFO] $*"
+}
+

scripts/wsrep_sst_mysqldump.sh

+#!/bin/sh -e
+# Copyright (C) 2009 Codership Oy
+# 
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; version 2 of the License.
+# 
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with this program; see the file COPYING. If not, write to the
+# Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston
+# MA  02110-1301  USA.
+
+# This is a reference script for mysqldump-based state snapshot tansfer
+
+. $(dirname $0)/wsrep_sst_common
+
+EINVAL=22
+
+local_ip()
+{
+    PATH=$PATH:/usr/sbin:/usr/bin:/sbin:/bin
+
+    [ "$1" = "127.0.0.1" ]      && return 0
+    [ "$1" = "localhost" ]      && return 0
+    [ "$1" = "$(hostname -s)" ] && return 0
+    [ "$1" = "$(hostname -f)" ] && return 0
+    [ "$1" = "$(hostname -d)" ] && return 0
+
+    # Now if ip program is not found in the path, we can't return 0 since
+    # it would block any address. Thankfully grep should fail in this case
+    ip route get "$1" | grep local >/dev/null && return 0
+
+    return 1
+}
+
+if test -z "$WSREP_SST_OPT_USER";  then err "USER cannot be nil";  exit $EINVAL; fi
+if test -z "$WSREP_SST_OPT_HOST";  then err "HOST cannot be nil";  exit $EINVAL; fi
+if test -z "$WSREP_SST_OPT_PORT";  then err "PORT cannot be nil";  exit $EINVAL; fi
+if test -z "$WSREP_SST_OPT_LPORT"; then err "LPORT cannot be nil"; exit $EINVAL; fi
+if test -z "$WSREP_SST_OPT_SOCKET";then err "SOCKET cannot be nil";exit $EINVAL; fi
+if test -z "$WSREP_SST_OPT_GTID";  then err "GTID cannot be nil";  exit $EINVAL; fi
+
+if local_ip $WSREP_SST_OPT_HOST && \
+   [ "$WSREP_SST_OPT_PORT" = "$WSREP_SST_OPT_LPORT" ]
+then
+    wsrep_log_error \
+    "destination address '$WSREP_SST_OPT_HOST:$WSREP_SST_OPT_PORT' matches source address."
+    exit $EINVAL
+fi
+
+# Check client version
+if ! mysql --version | grep 'Distrib 5.5' >/dev/null
+then
+    mysql --version >&2
+    err "this operation requires MySQL client version 5.5.x"
+    exit $EINVAL
+fi
+
+AUTH="-u$WSREP_SST_OPT_USER"
+if test -n "$WSREP_SST_OPT_PSWD"; then AUTH="$AUTH -p$WSREP_SST_OPT_PSWD"; fi
+
+STOP_WSREP="SET wsrep_on=OFF;"
+
+# NOTE: we don't use --routines here because we're dumping mysql.proc table
+MYSQLDUMP="mysqldump $AUTH -S$WSREP_SST_OPT_SOCKET \
+--add-drop-database --add-drop-table --skip-add-locks --create-options \
+--disable-keys --extended-insert --skip-lock-tables --quick --set-charset \
+--skip-comments --flush-privileges --all-databases"
+
+# mysqldump cannot restore CSV tables, fix this issue
+CSV_TABLES_FIX="
+set sql_mode='';
+
+USE mysql;
+
+SET @str = IF (@@have_csv = 'YES', 'CREATE TABLE IF NOT EXISTS general_log (event_time TIMESTAMP NOT NULL, user_host MEDIUMTEXT NOT NULL, thread_id INTEGER NOT NULL, server_id INTEGER UNSIGNED NOT NULL, command_type VARCHAR(64) NOT NULL,argument MEDIUMTEXT NOT NULL) engine=CSV CHARACTER SET utf8 comment=\"General log\"', 'SET @dummy = 0');
+
+PREPARE stmt FROM @str;
+EXECUTE stmt;
+DROP PREPARE stmt;
+
+SET @str = IF (@@have_csv = 'YES', 'CREATE TABLE IF NOT EXISTS slow_log (start_time TIMESTAMP NOT NULL, user_host MEDIUMTEXT NOT NULL, query_time TIME NOT NULL, lock_time TIME NOT NULL, rows_sent INTEGER NOT NULL, rows_examined INTEGER NOT NULL, db VARCHAR(512) NOT NULL, last_insert_id INTEGER NOT NULL, insert_id INTEGER NOT NULL, server_id INTEGER UNSIGNED NOT NULL, sql_text MEDIUMTEXT NOT NULL) engine=CSV CHARACTER SET utf8 comment=\"Slow log\"', 'SET @dummy = 0');
+
+PREPARE stmt FROM @str;
+EXECUTE stmt;
+DROP PREPARE stmt;"
+
+SET_START_POSITION="SET GLOBAL wsrep_start_position='$WSREP_SST_OPT_GTID';"
+
+MYSQL="mysql $AUTH -h$WSREP_SST_OPT_HOST -P$WSREP_SST_OPT_PORT "\
+"--disable-reconnect --connect_timeout=10"
+
+# need to disable logging when loading the dump
+# reason is that dump contains ALTER TABLE for log tables, and
+# this causes an error if logging is enabled
+GENERAL_LOG_OPT=`$MYSQL --skip-column-names -e"$STOP_WSREP SELECT @@GENERAL_LOG"`
+SLOW_LOG_OPT=`$MYSQL --skip-column-names -e"$STOP_WSREP SELECT @@SLOW_QUERY_LOG"`
+$MYSQL -e"$STOP_WSREP SET GLOBAL GENERAL_LOG=OFF"
+$MYSQL -e"$STOP_WSREP SET GLOBAL SLOW_QUERY_LOG=OFF"
+
+# commands to restore log settings
+RESTORE_GENERAL_LOG="SET GLOBAL GENERAL_LOG=$GENERAL_LOG_OPT;"
+RESTORE_SLOW_QUERY_LOG="SET GLOBAL SLOW_QUERY_LOG=$SLOW_LOG_OPT;"
+
+if [ $WSREP_SST_OPT_BYPASS -eq 0 ]
+then
+    (echo $STOP_WSREP && $MYSQLDUMP && echo $CSV_TABLES_FIX \
+    && echo $RESTORE_GENERAL_LOG && echo $RESTORE_SLOW_QUERY_LOG \
+    && echo $SET_START_POSITION \
+    || echo "SST failed to complete;") | $MYSQL
+else
+    wsrep_log_info "Bypassing state dump."
+    echo $SET_START_POSITION | $MYSQL
+fi
+
+#

scripts/wsrep_sst_rsync.sh

+#!/bin/bash -ue
+
+# Copyright (C) 2010 Codership Oy
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; version 2 of the License.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; see the file COPYING. If not, write to the
+# Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston
+# MA  02110-1301  USA.
+
+# This is a reference script for rsync-based state snapshot tansfer
+
+RSYNC_PID=
+RSYNC_CONF=
+
+. $(dirname $0)/wsrep_sst_common
+
+cleanup_joiner()
+{
+    wsrep_log_info "Joiner cleanup."
+    local PID=$(cat "$RSYNC_PID" 2>/dev/null || echo 0)
+    [ "0" != "$PID" ] && kill $PID && sleep 0.5 && kill -9 $PID >/dev/null 2>&1 \
+    || :
+    rm -rf "$RSYNC_CONF"
+    rm -rf "$MAGIC_FILE"
+    rm -rf "$RSYNC_PID"
+    echo " done." >&2
+}
+
+check_pid()
+{
+    local pid_file=$1
+    [ -r $pid_file ] && ps -p $(cat $pid_file) >/dev/null 2>&1
+}
+
+check_pid_and_port()
+{
+    local pid_file=$1
+    local rsync_pid=$(cat $pid_file)
+    local rsync_port=$2
+
+    check_pid $pid_file && \
+    netstat -anpt 2>/dev/null | \
+    grep LISTEN | grep \:$rsync_port | grep $rsync_pid/rsync >/dev/null
+}
+
+MAGIC_FILE="$WSREP_SST_OPT_DATA/rsync_sst_complete"
+rm -rf "$MAGIC_FILE"
+
+if [ "$WSREP_SST_OPT_ROLE" = "donor" ]
+then
+
+    if [ $WSREP_SST_OPT_BYPASS -eq 0 ]
+    then
+
+        FLUSHED="$WSREP_SST_OPT_DATA/tables_flushed"
+        rm -rf "$FLUSHED"
+
+        # Use deltaxfer only for WAN
+        inv=$(basename $0)
+        [ "$inv" = "wsrep_sst_rsync_wan" ] && WHOLE_FILE_OPT="" \
+                                           || WHOLE_FILE_OPT="--whole-file"
+
+        echo "flush tables"
+
+        # wait for tables flushed and state ID written to the file
+        while [ ! -r "$FLUSHED" ] && ! grep -q ':' "$FLUSHED" >/dev/null 2>&1
+        do
+            sleep 0.2
+        done
+
+        STATE="$(cat $FLUSHED)"
+        rm -rf "$FLUSHED"
+
+        sync
+
+        # Old filter - include everything except selected
+        # FILTER=(--exclude '*.err' --exclude '*.pid' --exclude '*.sock' \
+        #         --exclude '*.conf' --exclude core --exclude 'galera.*' \
+        #         --exclude grastate.txt --exclude '*.pem' \
+        #         --exclude '*.[0-9][0-9][0-9][0-9][0-9][0-9]' --exclude '*.index')
+
+        # New filter - exclude everything except dirs (schemas) and innodb files
+        FILTER=(-f '+ /ibdata*' -f '+ /ib_logfile*' -f '+ */' -f '-! */*')
+
+        RC=0
+        rsync --archive --no-times --ignore-times --inplace --delete --quiet \
+              $WHOLE_FILE_OPT "${FILTER[@]}" "$WSREP_SST_OPT_DATA" \
+              rsync://$WSREP_SST_OPT_ADDR || RC=$?
+
+        [ $RC -ne 0 ] && echo "rsync returned code $RC:" >> /dev/stderr
+
+        case $RC in
+        0)  RC=0   # Success
+            ;;
+        12) RC=71  # EPROTO
+            wsrep_log_error \
+                 "rsync server on the other end has incompatible protocol. " \
+                 "Make sure you have the same version of rsync on all nodes."
+            ;;
+        22) RC=12  # ENOMEM
+            ;;
+        *)  RC=255 # unknown error
+            ;;
+        esac
+
+        [ $RC -ne 0 ] && exit $RC
+
+    else # BYPASS
+        wsrep_log_info "Bypassing state dump."
+        STATE="$WSREP_SST_OPT_GTID"
+    fi
+
+    echo "continue" # now server can resume updating data
+
+    echo "$STATE" > "$MAGIC_FILE"
+    rsync -aqc "$MAGIC_FILE" rsync://$WSREP_SST_OPT_ADDR
+
+    echo "done $STATE"
+
+elif [ "$WSREP_SST_OPT_ROLE" = "joiner" ]
+then
+    MYSQLD_PID=$WSREP_SST_OPT_PARENT
+
+    MODULE="rsync_sst"
+
+    RSYNC_PID="$WSREP_SST_OPT_DATA/$MODULE.pid"
+
+    if check_pid $RSYNC_PID
+    then
+        echo "rsync daemon already running."
+        exit 114 # EALREADY
+    fi
+    rm -rf "$RSYNC_PID"
+
+    ADDR=$WSREP_SST_OPT_ADDR
+    RSYNC_PORT=$(echo $ADDR | awk -F ':' '{ print $2 }')
+    if [ -z "$RSYNC_PORT" ]
+    then
+        RSYNC_PORT=4444
+        ADDR="$(echo $ADDR | awk -F ':' '{ print $1 }'):$RSYNC_PORT"
+    fi
+
+    trap "exit 32" HUP PIPE
+    trap "exit 3"  INT TERM
+    trap cleanup_joiner EXIT
+
+    MYUID=$(id -u)
+    MYGID=$(id -g)
+    RSYNC_CONF="$WSREP_SST_OPT_DATA/$MODULE.conf"
+
+cat << EOF > "$RSYNC_CONF"
+pid file = $RSYNC_PID
+use chroot = no
+[$MODULE]
+	path = $WSREP_SST_OPT_DATA
+	read only = no
+	timeout = 300
+	uid = $MYUID
+	gid = $MYGID
+EOF
+
+#    rm -rf "$DATA"/ib_logfile* # we don't want old logs around
+
+    # listen at all interfaces (for firewalled setups)
+    rsync --daemon --port $RSYNC_PORT --config "$RSYNC_CONF"
+
+    until check_pid_and_port $RSYNC_PID $RSYNC_PORT
+    do
+        sleep 0.2
+    done
+
+    echo "ready $ADDR/$MODULE"
+
+    # wait for SST to complete by monitoring magic file
+    while [ ! -r "$MAGIC_FILE" ] && check_pid "$RSYNC_PID" && \
+          ps -p $MYSQLD_PID >/dev/null
+    do
+        sleep 1
+    done
+
+    if ! ps -p $MYSQLD_PID >/dev/null
+    then
+        echo "Parent mysqld process (PID:$MYSQLD_PID) terminated unexpectedly." >&2
+        exit 32
+    fi
+
+    if [ -r "$MAGIC_FILE" ]
+    then
+        cat "$MAGIC_FILE" # output UUID:seqno
+    else
+        # this message should cause joiner to abort
+        echo "rsync process ended without creating '$MAGIC_FILE'"
+    fi
+
+#    cleanup_joiner
+else
+    echo "Unrecognized role: '$WSREP_SST_OPT_ROLE'"
+    exit 22 # EINVAL
+fi
+
+exit 0

scripts/wsrep_sst_xtrabackup.sh

+#!/bin/bash -ue
+
+# Copyright (C) 2011 Percona Inc
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; version 2 of the License.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; see the file COPYING. If not, write to the
+# Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston
+# MA  02110-1301  USA.
+
+# This is a reference script for Percona XtraBackup-based state snapshot tansfer
+
+TMPDIR="/tmp"
+
+. $(dirname $0)/wsrep_sst_common
+
+cleanup_joiner()
+{
+#set -x
+    local PID=$(ps -aef |grep nc| grep $NC_PORT  | awk '{ print $2 }')
+    wsrep_log_info "Killing nc pid $PID"
+    [ -n "$PID" -a "0" != "$PID" ] && kill $PID && (kill $PID && kill -9 $PID) || :
+    rm -f "$MAGIC_FILE"
+#set +x
+}
+
+check_pid()
+{
+    local pid_file=$1
+    [ -r $pid_file ] && ps -p $(cat $pid_file) >/dev/null 2>&1
+}
+
+kill_xtrabackup()
+{
+#set -x
+    local PID=$(cat $XTRABACKUP_PID)
+    [ -n "$PID" -a "0" != "$PID" ] && kill $PID && (kill $PID && kill -9 $PID) || :
+    rm -f "$XTRABACKUP_PID"
+#set +x
+}
+
+# waits ~10 seconds for nc to open the port and then reports ready
+# (regardless of timeout)
+wait_for_nc()
+{
+    local PORT=$1
+    local ADDR=$2
+    local MODULE=$3
+    for i in $(seq 1 50)
+    do
+        netstat -nptl 2>/dev/null | grep '/nc\s*$' | awk '{ print $4 }' | \
+        sed 's/.*://' | grep \^${PORT}\$ >/dev/null && break
+        sleep 0.2
+    done
+    echo "ready ${ADDR}/${MODULE}"
+}
+
+INNOBACKUPEX_BIN=innobackupex
+INNOBACKUPEX_ARGS=""
+NC_BIN=nc
+
+for TOOL_BIN in INNOBACKUPEX_BIN NC_BIN ; do
+  if ! which ${!TOOL_BIN} > /dev/null 2>&1
+  then 
+     echo "Can't find ${!TOOL_BIN} in the path"
+     exit 22 # EINVAL
+  fi
+done
+
+#ROLE=$1
+#ADDR=$2
+readonly AUTH=(${WSREP_SST_OPT_AUTH//:/ })
+readonly DATA="${WSREP_SST_OPT_DATA}"
+#CONF=$5
+
+INFO_FILE="xtrabackup_galera_info"
+IST_FILE="xtrabackup_ist"
+
+MAGIC_FILE="${DATA}/${INFO_FILE}"
+rm -f "${MAGIC_FILE}"
+
+if [ "$WSREP_SST_OPT_ROLE" = "donor" ]
+then
+
+#    UUID=$6
+#    SEQNO=$7
+#    BYPASS=$8
+
+    NC_PORT=$(echo $WSREP_SST_OPT_ADDR | awk -F '[:/]' '{ print $2 }')
+    REMOTEIP=$(echo $WSREP_SST_OPT_ADDR | awk -F ':' '{ print $1 }')
+
+    if [ $WSREP_SST_OPT_BYPASS -eq 0 ]
+    then
+
+        INNOBACKUPEX_ARGS="--galera-info --tmpdir=${TMPDIR} --stream=tar
+                           --defaults-file=${WSREP_SST_OPT_CONF}
+                           --socket=${WSREP_SST_OPT_SOCKET}"
+
+        if [ "${AUTH[0]}" != "(null)" ]; then
+           INNOBACKUPEX_ARGS="${INNOBACKUPEX_ARGS} --user=${AUTH[0]}"
+        fi
+
+        if [ ${#AUTH[*]} -eq 2 ]; then
+           INNOBACKUPEX_ARGS="${INNOBACKUPEX_ARGS} --password=${AUTH[1]}"
+        fi
+
+        set +e
+
+        # This file and variable seems to have no effect and probably should be deleted
+        XTRABACKUP_PID=$(mktemp --tmpdir wsrep_sst_xtrabackupXXXX.pid)
+
+        ${INNOBACKUPEX_BIN} ${INNOBACKUPEX_ARGS} ${TMPDIR} \
+        2> ${DATA}/innobackup.backup.log | \
+        ${NC_BIN} ${REMOTEIP} ${NC_PORT}
+
+        RC=( "${PIPESTATUS[@]}" )
+        set -e
+
+        if [ ${RC[0]} -ne 0 ]; then
+          wsrep_log_error "${INNOBACKUPEX_BIN} finished with error: ${RC[0]}. " \
+                          "Check ${DATA}/innobackup.backup.log"
+          exit 22
+        elif [  ${RC[1]} -ne 0 ]; then
+          wsrep_log_error "${NC_BIN} finished with error: ${RC[1]}"
+          exit 22
+        fi
+
+        if check_pid ${XTRABACKUP_PID}
+        then
+            wsrep_log_error "xtrabackup process is still running. Killing... "
+            kill_xtrabackup
+            exit 22
+        fi
+
+        rm -f ${XTRABACKUP_PID}
+
+    else # BYPASS
+        STATE="${WSREP_SST_OPT_GTID}"
+        echo "continue" # now server can resume updating data
+        echo "${STATE}" > "${MAGIC_FILE}"
+        echo "1" > "${DATA}/${IST_FILE}"
+        (cd ${DATA}; tar cf - ${INFO_FILE} ${IST_FILE}) | ${NC_BIN} ${REMOTEIP} ${NC_PORT}
+        rm -f ${DATA}/${IST_FILE}
+    fi
+
+    echo "done ${WSREP_SST_OPT_GTID}"
+
+elif [ "${WSREP_SST_OPT_ROLE}" = "joiner" ]
+then
+    MODULE="xtrabackup_sst"
+
+    rm -f ${DATA}/xtrabackup_*
+
+    ADDR=${WSREP_SST_OPT_ADDR}
+    NC_PORT=$(echo ${ADDR} | awk -F ':' '{ print $2 }')
+    if [ -z "${NC_PORT}" ]
+    then
+        NC_PORT=4444
+        ADDR="$(echo ${ADDR} | awk -F ':' '{ print $1 }'):${NC_PORT}"
+    fi
+
+    wait_for_nc ${NC_PORT} ${ADDR} ${MODULE} &
+
+#    trap "exit 32" HUP PIPE
+#    trap "exit 3"  INT TERM
+    trap cleanup_joiner HUP PIPE INT TERM
+
+    set +e
+    ${NC_BIN} -dl ${NC_PORT}  | tar xfi  - -C ${DATA}  1>&2
+    RC=( "${PIPESTATUS[@]}" )
+    set -e
+
+    wait %% # join wait_for_nc thread
+
+    if [ ${RC[0]} -ne 0 -o ${RC[1]} -ne 0 ];
+    then
+        wsrep_log_error "Error while getting st data from donor node: " \
+                        "${RC[0]}, ${RC[1]}"
+        exit 32
+    fi
+
+    if [ ! -r "${MAGIC_FILE}" ]
+    then
+        # this message should cause joiner to abort
+        wsrep_log_error "xtrabackup process ended without creating '${MAGIC_FILE}'"
+        exit 32
+    fi
+
+    if ! ps -p ${WSREP_SST_OPT_PARENT} >/dev/null
+    then
+        wsrep_log_error "Parent mysqld process (PID:${WSREP_SST_OPT_PARENT}) terminated unexpectedly." >&2
+        exit 32
+    fi
+
+    if [ ! -r "${IST_FILE}" ]
+    then
+        rm -f ${DATA}/ib_logfile*
+        ${INNOBACKUPEX_BIN} --defaults-file=${WSREP_SST_OPT_CONF} --apply-log \
+        --ibbackup=xtrabackup ${DATA} 1>&2 2> ${DATA}/innobackup.prepare.log
+        if [ $? -ne 0 ];
+        then
+            wsrep_log_error "${INNOBACKUPEX_BIN} finished with errors. Check ${DATA}/innobackup.prepare.log" >&2
+            exit 22
+        fi
+    fi
+
+    cat "${MAGIC_FILE}" # output UUID:seqno
+
+else
+    wsrep_log_error "Unrecognized role: ${WSREP_SST_OPT_ROLE}"
+    exit 22 # EINVAL
+fi
+
+exit 0

sql/wsrep_notify.cc

+/* Copyright 2010 Codership Oy <http://www.codership.com>
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; version 2 of the License.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
+
+#include <mysqld.h>
+#include "wsrep_priv.h"
+
+const char* wsrep_notify_cmd="";
+
+static const char* _status_str(wsrep_member_status_t status)
+{
+  switch (status)
+  {
+  case WSREP_MEMBER_UNDEFINED: return "Undefined";
+  case WSREP_MEMBER_JOINER:    return "Joiner";
+  case WSREP_MEMBER_DONOR:     return "Donor";
+  case WSREP_MEMBER_JOINED:    return "Joined";
+  case WSREP_MEMBER_SYNCED:    return "Synced";
+  default:                     return "Error(?)";
+  }
+}
+
+void wsrep_notify_status (wsrep_member_status_t    status,
+                          const wsrep_view_info_t* view)
+{
+  if (!wsrep_notify_cmd || 0 == strlen(wsrep_notify_cmd))
+  {
+    WSREP_INFO("wsrep_notify_cmd is not defined, skipping notification.");
+    return;
+  }
+
+  char  cmd_buf[1 << 16]; // this can be long
+  long  cmd_len = sizeof(cmd_buf) - 1;
+  char* cmd_ptr = cmd_buf;
+  long  cmd_off = 0;
+
+  cmd_off += snprintf (cmd_ptr + cmd_off, cmd_len - cmd_off, "%s",
+                       wsrep_notify_cmd);
+
+  if (status >= WSREP_MEMBER_UNDEFINED && status < WSREP_MEMBER_ERROR)
+  {
+    cmd_off += snprintf (cmd_ptr + cmd_off, cmd_len - cmd_off, " --status %s",
+                         _status_str(status));
+  }
+  else
+  {
+    /* here we preserve provider error codes */
+    cmd_off += snprintf (cmd_ptr + cmd_off, cmd_len - cmd_off,
+                         " --status 'Error(%d)'", status);
+  }
+
+  if (0 != view)
+  {
+    char uuid_str[40];
+
+    wsrep_uuid_print (&view->uuid, uuid_str, sizeof(uuid_str));
+    cmd_off += snprintf (cmd_ptr + cmd_off, cmd_len - cmd_off,
+                         " --uuid %s", uuid_str);
+
+    cmd_off += snprintf (cmd_ptr + cmd_off, cmd_len - cmd_off,
+                         " --primary %s", view->view >= 0 ? "yes" : "no");
+
+    cmd_off += snprintf (cmd_ptr + cmd_off, cmd_len - cmd_off,
+                         " --index %d", view->my_idx);
+
+    cmd_off += snprintf (cmd_ptr + cmd_off, cmd_len - cmd_off, " --members");
+
+    for (int i = 0; i < view->memb_num; i++)
+    {
+      wsrep_uuid_print (&view->members[i].id, uuid_str, sizeof(uuid_str));
+      cmd_off += snprintf (cmd_ptr + cmd_off, cmd_len - cmd_off,
+                           "%c%s/%s/%s", i > 0 ? ',' : ' ',
+                           uuid_str, view->members[i].name,
+                           view->members[i].incoming);
+    }
+  }
+
+  if (cmd_off == cmd_len)
+  {
+    WSREP_ERROR("Notification buffer too short (%ld). Aborting notification.",
+               cmd_len);
+    return;
+  }
+
+  wsp::process p(cmd_ptr, "r");
+
+  p.wait();
+  int err = p.error();
+
+  if (err)
+  {
+    WSREP_ERROR("Notification command failed: %d (%s): \"%s\"",
+                err, strerror(err), cmd_ptr);
+  }
+}
+

sql/wsrep_priv.h

+/* Copyright 2010 Codership Oy <http://www.codership.com>
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; version 2 of the License.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+//! @file declares symbols private to wsrep integration layer
+
+#ifndef WSREP_PRIV_H
+#define WSREP_PRIV_H
+
+#include "wsrep_mysqld.h"
+#include "../wsrep/wsrep_api.h"
+
+#include <log.h>
+#include <pthread.h>
+#include <cstdio>
+
+extern void    wsrep_ready_set (my_bool x);
+
+extern ssize_t wsrep_sst_prepare   (void** msg);
+extern int     wsrep_sst_donate_cb (void* app_ctx,
+                                    void* recv_ctx,
+                                    const void* msg, size_t msg_len,
+                                    const wsrep_uuid_t* current_uuid,
+                                    wsrep_seqno_t       current_seqno,
+                                    const char* state, size_t state_len,
+                                    bool bypass);
+
+extern size_t guess_ip (char* buf, size_t buf_len);
+extern size_t guess_address(char* buf, size_t buf_len);
+
+extern wsrep_uuid_t  local_uuid;
+extern wsrep_seqno_t local_seqno;
+
+/*! SST thread signals init thread about sst completion */
+extern void wsrep_sst_complete(const wsrep_uuid_t* uuid, wsrep_seqno_t, bool);
+
+extern void wsrep_notify_status (wsrep_member_status_t new_status,
+                                 const wsrep_view_info_t* view = 0);
+
+namespace wsp {
+class node_status
+{
+public:
+  node_status() : status(WSREP_MEMBER_UNDEFINED) {}
+  void set(wsrep_member_status_t new_status,
+           const wsrep_view_info_t* view = 0)
+  {
+    if (status != new_status || 0 != view)
+    {
+      wsrep_notify_status(new_status, view);
+      status = new_status;
+    }
+  }
+  wsrep_member_status_t get() const { return status; }
+private:
+  wsrep_member_status_t status;
+};
+} /* namespace wsp */
+
+extern wsp::node_status local_status;
+
+namespace wsp {
+/* A small class to run external programs. */
+class process
+{
+private:
+    const char* const str_;
+    FILE*       io_;
+    int         err_;
+    pid_t       pid_;
+
+public:
+/*! @arg type is a pointer to a null-terminated string which  must  contain
+         either  the  letter  'r'  for  reading  or the letter 'w' for writing.
+ */
+    process  (const char* cmd, const char* type);
+    ~process ();
+
+    FILE* pipe () { return io_;  }
+    int   error() { return err_; }
+    int   wait ();
+    const char* cmd() { return str_; }
+};
+#ifdef REMOVED
+class lock
+{
+  pthread_mutex_t* const mtx_;
+
+public:
+
+  lock (pthread_mutex_t* mtx) : mtx_(mtx)
+  {
+    int err = pthread_mutex_lock (mtx_);
+
+    if (err)
+    {
+      WSREP_ERROR("Mutex lock failed: %s", strerror(err));
+      abort();
+    }
+  }
+
+  virtual ~lock ()
+  {
+    int err = pthread_mutex_unlock (mtx_);
+
+    if (err)
+    {
+      WSREP_ERROR("Mutex unlock failed: %s", strerror(err));
+      abort();
+    }
+  }
+
+  inline void wait (pthread_cond_t* cond)
+  {
+    pthread_cond_wait (cond, mtx_);
+  }
+
+private:
+
+  lock (const lock&);
+  lock& operator=(const lock&);
+
+};
+
+class monitor
+{
+  int             mutable refcnt;
+  pthread_mutex_t mutable mtx;
+  pthread_cond_t  mutable cond;
+
+public:
+
+  monitor() : refcnt(0)
+  {
+    pthread_mutex_init (&mtx, NULL);
+    pthread_cond_init  (&cond, NULL);
+  }
+
+  ~monitor()
+  {
+    pthread_mutex_destroy (&mtx);
+    pthread_cond_destroy  (&cond);
+  }
+
+  void enter() const
+  {
+    lock l(&mtx);
+
+    while (refcnt)
+    {
+      l.wait(&cond);
+    }
+    refcnt++;
+  }
+
+  void leave() const
+  {
+    lock l(&mtx);
+
+    refcnt--;
+    if (refcnt == 0)
+    {
+      pthread_cond_signal (&cond);
+    }
+  }
+
+private:
+
+  monitor (const monitor&);
+  monitor& operator= (const monitor&);
+};
+
+class critical
+{
+  const monitor& mon;
+
+public:
+
+  critical(const monitor& m) : mon(m) { mon.enter(); }
+
+  ~critical() { mon.leave(); }
+
+private:
+
+  critical (const critical&);
+  critical& operator= (const critical&);
+};
+#endif
+
+class thd
+{
+  class thd_init
+  {
+  public:
+    thd_init()  { my_thread_init(); }
+    ~thd_init() { my_thread_end();  }
+  }
+  init;
+
+  thd (const thd&);
+  thd& operator= (const thd&);
+
+public:
+
+  thd(my_bool wsrep_on);
+  ~thd();
+  THD* const ptr;
+};
+
+class string
+{
+public:
+    string() : string_(0) {}
+    void set(char* str) { if (string_) free (string_); string_ = str; }
+    ~string() { set (0); }
+private:
+    char* string_;
+};
+
+} // namespace wsrep
+#endif /* WSREP_PRIV_H */

support-files/wsrep.cnf.sh

+# This file contains wsrep-related mysqld options. It should be included
+# in the main MySQL configuration file.
+#
+# Options that need to be customized:
+#  - wsrep_provider
+#  - wsrep_cluster_address
+#  - wsrep_sst_auth
+# The rest of defaults should work out of the box.
+
+##
+## mysqld options _MANDATORY_ for correct opration of the cluster
+##
+[mysqld]
+
+# (This must be substituted by wsrep_format)
+binlog_format=ROW
+
+# Currently only InnoDB storage engine is supported
+default-storage-engine=innodb
+
+# to avoid issues with 'bulk mode inserts' using autoinc
+innodb_autoinc_lock_mode=2
+
+# This is a must for paralell applying
+innodb_locks_unsafe_for_binlog=1
+
+# Query Cache is not supported with wsrep
+query_cache_size=0
+query_cache_type=0
+
+# Override bind-address
+# In some systems bind-address defaults to 127.0.0.1, and with mysqldump SST
+# it will have (most likely) disastrous consequences on donor node
+bind-address=0.0.0.0
+
+##
+## WSREP options
+##
+
+# Full path to wsrep provider library or 'none'
+wsrep_provider=none
+
+# Provider specific configuration options
+#wsrep_provider_options=
+
+# Logical cluster name. Should be the same for all nodes.
+wsrep_cluster_name="my_wsrep_cluster"
+
+# Group communication system handle
+#wsrep_cluster_address="dummy://"
+
+# Human-readable node name (non-unique). Hostname by default.
+#wsrep_node_name=
+
+# Base replication <address|hostname>[:port] of the node.
+# The values supplied will be used as defaults for state transfer receiving,
+# listening ports and so on. Default: address of the first network interface.
+#wsrep_node_address=
+
+# Address for incoming client connections. Autodetect by default.
+#wsrep_node_incoming_address=
+
+# How many threads will process writesets from other nodes
+wsrep_slave_threads=1
+
+# DBUG options for wsrep provider
+#wsrep_dbug_option
+
+# Generate fake primary keys for non-PK tables (required for multi-master
+# and parallel applying operation)
+wsrep_certify_nonPK=1
+
+# Maximum number of rows in write set
+wsrep_max_ws_rows=131072
+
+# Maximum size of write set
+wsrep_max_ws_size=1073741824
+
+# to enable debug level logging, set this to 1
+wsrep_debug=0
+
+# convert locking sessions into transactions
+wsrep_convert_LOCK_to_trx=0
+
+# how many times to retry deadlocked autocommits
+wsrep_retry_autocommit=1
+
+# change auto_increment_increment and auto_increment_offset automatically
+wsrep_auto_increment_control=1
+
+# retry autoinc insert, which failed for duplicate key error
+wsrep_drupal_282555_workaround=0
+
+# enable "strictly synchronous" semantics for read operations
+wsrep_causal_reads=0
+
+# Command to call when node status or cluster membership changes.
+# Will be passed all or some of the following options:
+# --status  - new status of this node
+# --uuid    - UUID of the cluster
+# --primary - whether the component is primary or not ("yes"/"no")
+# --members - comma-separated list of members
+# --index   - index of this node in the list
+wsrep_notify_cmd=
+
+##
+## WSREP State Transfer options
+##
+
+# State Snapshot Transfer method
+wsrep_sst_method=mysqldump
+
+# Address which donor should send State Snapshot to.
+# Should be the address of THIS node. DON'T SET IT TO DONOR ADDRESS!!!
+# (SST method dependent. Defaults to the first IP of the first interface)
+#wsrep_sst_receive_address=
+
+# SST authentication string. This will be used to send SST to joining nodes.
+# Depends on SST method. For mysqldump method it is root:<root password>
+wsrep_sst_auth=root:
+
+# Desired SST donor name.
+#wsrep_sst_donor=
+
+# Reject client queries when donating SST (false)
+#wsrep_sst_donor_rejects_queries=0
+
+# Protocol version to use
+# wsrep_protocol_version=

support-files/wsrep_notify.sh

+#!/bin/sh -eu
+
+# This is a simple example of wsrep notification script (wsrep_notify_cmd).
+# It will create 'wsrep' schema and two tables in it: 'membeship' and 'status'
+# and fill them on every membership or node status change.
+#
+# Edit parameters below to specify the address and login to server.
+
+USER=root
+PSWD=rootpass
+HOST=127.0.0.1
+PORT=3306
+
+SCHEMA="wsrep"
+MEMB_TABLE="$SCHEMA.membership"
+STATUS_TABLE="$SCHEMA.status"
+
+BEGIN="
+SET wsrep_on=0;
+DROP SCHEMA IF EXISTS $SCHEMA; CREATE SCHEMA $SCHEMA;
+CREATE TABLE $MEMB_TABLE (
+    idx  INT UNIQUE PRIMARY KEY,
+    uuid CHAR(40) UNIQUE, /* node UUID */
+    name VARCHAR(32),     /* node name */
+    addr VARCHAR(256)     /* node address */
+) ENGINE=MEMORY;
+CREATE TABLE $STATUS_TABLE (
+    size   INT,      /* component size   */
+    idx    INT,      /* this node index  */
+    status CHAR(16), /* this node status */
+    uuid   CHAR(40), /* cluster UUID */
+    prim   BOOLEAN   /* if component is primary */
+) ENGINE=MEMORY;
+BEGIN;
+DELETE FROM $MEMB_TABLE;
+DELETE FROM $STATUS_TABLE;
+"
+END="COMMIT;"
+
+configuration_change()
+{
+    echo "$BEGIN;"
+
+    local idx=0
+
+    for NODE in $(echo $MEMBERS | sed s/,/\ /g)
+    do
+        echo "INSERT INTO $MEMB_TABLE VALUES ( $idx, "
+        # Don't forget to properly quote string values
+        echo "'$NODE'" | sed  s/\\//\',\'/g
+        echo ");"
+        idx=$(( $idx + 1 ))
+    done
+
+    echo "INSERT INTO $STATUS_TABLE VALUES($idx, $INDEX, '$STATUS', '$CLUSTER_UUID', $PRIMARY);"
+
+    echo "$END"
+}
+
+status_update()
+{
+    echo "SET wsrep_on=0; BEGIN; UPDATE $STATUS_TABLE SET status='$STATUS'; COMMIT;"
+}
+
+COM=status_update # not a configuration change by default
+
+while [ $# -gt 0 ]
+do
+    case $1 in
+    --status)
+        STATUS=$2
+        shift
+        ;;
+    --uuid)
+        CLUSTER_UUID=$2
+        shift
+        ;;
+    --primary)
+        [ "$2" = "yes" ] && PRIMARY="1" || PRIMARY="0"
+        COM=configuration_change
+        shift
+        ;;
+    --index)
+        INDEX=$2
+        shift
+        ;;
+    --members)
+        MEMBERS=$2
+        shift
+        ;;
+    esac
+    shift
+done
+
+# Undefined means node is shutting down
+if [ "$STATUS" != "Undefined" ]
+then
+    $COM | mysql -B -u$USER -p$PSWD -h$HOST -P$PORT
+fi
+
+exit 0
+#

wsrep/CMakeLists.txt

+# Copyright (c) 2012, Codership Oy. All rights reserved.
+# 
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; version 2 of the License.
+# 
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+
+INCLUDE_DIRECTORIES( "." )
+
+SET(WSREP_SOURCES wsrep_uuid.c wsrep_loader.c wsrep_dummy.c)
+
+ADD_CONVENIENCE_LIBRARY(wsrep ${WSREP_SOURCES})
+DTRACE_INSTRUMENT(wsrep)
+
+#ADD_EXECUTABLE(listener wsrep_listener.c ${WSREP_SOURCES})
+#TARGET_LINK_LIBRARIES(listener ${LIBDL})

wsrep/Makefile.am

+noinst_LIBRARIES = libwsrep.a
+libwsrep_a_SOURCES = wsrep_api.h wsrep_loader.c wsrep_dummy.c wsrep_uuid.c

wsrep/wsrep_uuid.c

+/* Copyright (C) 2009 Codership Oy <info@codersihp.com>
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; version 2 of the License.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+/*! @file Helper functions to deal with history UUID string representations */
+
+#include <errno.h>
+#include <ctype.h>
+#include <stdio.h>
+
+#include "wsrep_api.h"
+
+/*!
+ * Read UUID from string
+ * @return length of UUID string representation or -EINVAL in case of error
+ */
+ssize_t
+wsrep_uuid_scan (const char* str, size_t str_len, wsrep_uuid_t* uuid)
+{
+    size_t uuid_len = 0;
+    size_t uuid_offt = 0;
+
+    while (uuid_len + 1 < str_len) {
+        if ((4  == uuid_offt || 6 == uuid_offt || 8 == uuid_offt ||
+             10 == uuid_offt) && str[uuid_len] == '-') {
+            // skip dashes after 4th, 6th, 8th and 10th positions
+            uuid_len += 1;
+            continue;
+        }
+        if (isxdigit(str[uuid_len]) && isxdigit(str[uuid_len + 1])) {
+            // got hex digit
+            sscanf (str + uuid_len, "%2hhx", uuid->uuid + uuid_offt);
+            uuid_len  += 2;
+            uuid_offt += 1;
+            if (sizeof (uuid->uuid) == uuid_offt)
+                return uuid_len;
+        }
+        else {
+            break;
+        }
+    }
+
+    *uuid = WSREP_UUID_UNDEFINED;
+    return -EINVAL;
+}
+
+/*!
+ * Write UUID to string
+ * @return length of UUID string representation or -EMSGSIZE if string is too
+ *         short
+ */
+ssize_t
+wsrep_uuid_print (const wsrep_uuid_t* uuid, char* str, size_t str_len)
+{
+    if (str_len > 36) {
+        const unsigned char* u = uuid->uuid;
+        return snprintf(str, str_len, "%02x%02x%02x%02x-%02x%02x-%02x%02x-"
+                        "%02x%02x-%02x%02x%02x%02x%02x%02x",
+                        u[ 0], u[ 1], u[ 2], u[ 3], u[ 4], u[ 5], u[ 6], u[ 7],
+                        u[ 8], u[ 9], u[10], u[11], u[12], u[13], u[14], u[15]);
+    }
+    else {
+        return -EMSGSIZE;
+    }
+}
+