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#!/bin/bash
#Need to be copied to hooks/<HOOKS_VER>/set/post/
#TODO: All gluster and samba paths are assumed for fedora like systems.
#Some efforts are required to make it work on other distros.
#The preferred way of creating a smb share of a gluster volume has changed.
#The old method was to create a fuse mount of the volume and share the mount
#point through samba.
#
#New method eliminates the requirement of fuse mount and changes in fstab.
#glusterfs_vfs plugin for samba makes call to libgfapi to access the volume.
#
#This hook script enables user to enable or disable smb share by volume set
#option. Keys "user.cifs" and "user.smb" both are valid, but user.smb is
#preferred.
PROGNAME="Ssamba-set"
OPTSPEC="volname:,gd-workdir:"
VOL=
CONFIGFILE=
LOGFILEBASE=
PIDDIR=
GLUSTERD_WORKDIR=
USERSMB_SET=""
USERCIFS_SET=""
function parse_args () {
ARGS=$(getopt -o 'o:' -l $OPTSPEC -n $PROGNAME -- "$@")
eval set -- "$ARGS"
while true; do
case $1 in
--volname)
shift
VOL=$1
;;
--gd-workdir)
shift
GLUSTERD_WORKDIR=$1
;;
--)
shift
break
;;
-o)
shift
read key value < <(echo "$1" | tr "=" " ")
case "$key" in
"user.cifs")
USERCIFS_SET="YES"
;;
"user.smb")
USERSMB_SET="YES"
;;
*)
;;
esac
;;
*)
shift
break
;;
esac
shift
done
}
function find_config_info () {
cmdout=`smbd -b | grep smb.conf`
if [ $? -ne 0 ]; then
echo "Samba is not installed"
exit 1
fi
CONFIGFILE=`echo $cmdout | awk '{print $2}'`
PIDDIR=`smbd -b | grep PIDDIR | awk '{print $2}'`
LOGFILEBASE=`smbd -b | grep 'LOGFILEBASE' | awk '{print $2}'`
}
function add_samba_share () {
volname=$1
STRING="\n[gluster-$volname]\n"
STRING+="comment = For samba share of volume $volname\n"
STRING+="vfs objects = glusterfs\n"
STRING+="glusterfs:volume = $volname\n"
STRING+="glusterfs:logfile = $LOGFILEBASE/glusterfs-$volname.%%M.log\n"
STRING+="glusterfs:loglevel = 7\n"
STRING+="path = /\n"
STRING+="read only = no\n"
STRING+="guest ok = yes\n"
printf "$STRING" >> ${CONFIGFILE}
}
function sighup_samba () {
pid=`cat ${PIDDIR}/smbd.pid`
if [ "x$pid" != "x" ]
then
kill -HUP "$pid";
else
service smb condrestart
fi
}
function deactivate_samba_share () {
volname=$1
sed -i -e '/^\[gluster-'"$volname"'\]/{ :a' -e 'n; /available = no/H; /^$/!{$!ba;}; x; /./!{ s/^/available = no/; $!{G;x}; $H; }; s/.*//; x; };' ${CONFIGFILE}
}
function is_volume_started () {
volname=$1
echo "$(grep status $GLUSTERD_WORKDIR/vols/"$volname"/info |\
cut -d"=" -f2)"
}
function get_smb () {
volname=$1
uservalue=
usercifsvalue=$(grep user.cifs $GLUSTERD_WORKDIR/vols/"$volname"/info |\
cut -d"=" -f2)
usersmbvalue=$(grep user.smb $GLUSTERD_WORKDIR/vols/"$volname"/info |\
cut -d"=" -f2)
if [ -n "$usercifsvalue" ]; then
if [ "$usercifsvalue" = "disable" ] || [ "$usercifsvalue" = "off" ]; then
uservalue="disable"
fi
fi
if [ -n "$usersmbvalue" ]; then
if [ "$usersmbvalue" = "disable" ] || [ "$usersmbvalue" = "off" ]; then
uservalue="disable"
fi
fi
echo "$uservalue"
}
parse_args "$@"
if [ "0" = "$(is_volume_started "$VOL")" ]; then
exit 0
fi
if [ "$USERCIFS_SET" = "YES" ] || [ "$USERSMB_SET" = "YES" ]; then
#Find smb.conf, smbd pid directory and smbd logfile path
find_config_info
if [ "$(get_smb "$VOL")" = "disable" ]; then
deactivate_samba_share $VOL
else
if ! grep --quiet "\[gluster-$VOL\]" ${CONFIGFILE} ; then
add_samba_share $VOL
else
sed -i '/\[gluster-'"$VOL"'\]/,/^$/!b;/available = no/d' ${CONFIGFILE}
fi
fi
sighup_samba
fi
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