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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:"
VOL=
enable_smb=""
function parse_args () {
ARGS=$(getopt -l $OPTSPEC -o "o" -name $PROGNAME $@)
eval set -- "$ARGS"
while true; do
case $1 in
--volname)
shift
VOL=$1
;;
*)
shift
for pair in $@; do
read key value < <(echo "$pair" | tr "=" " ")
case "$key" in
"user.cifs")
enable_smb=$value
;;
"user.smb")
enable_smb=$value
;;
*)
;;
esac
done
shift
break
;;
esac
shift
done
}
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 = $volname\n"
STRING+="glusterfs:logfile = /var/log/samba/glusterfs-$volname.%%M.log\n"
STRING+="glusterfs:loglevel = 7\n"
STRING+="path = /\n"
STRING+="read only = no\n"
STRING+="guest ok = yes\n"
printf "$STRING" >> /etc/samba/smb.conf
}
function sighup_samba () {
pid=`cat /var/run/smbd.pid`
if [ "x$pid" != "x" ]
then
kill -HUP "$pid";
else
/etc/init.d/smb start
fi
}
function del_samba_share () {
volname=$1
sed -i "/\[gluster-$volname\]/,/^$/d" /etc/samba/smb.conf
}
function is_volume_started () {
volname=$1
echo "$(grep status /var/lib/glusterd/vols/"$volname"/info |\
cut -d"=" -f2)"
}
parse_args $@
if [ "0" = $(is_volume_started "$VOL") ]; then
exit 0
fi
if [ "$enable_smb" = "enable" ]; then
if ! grep --quiet "\[gluster-$VOL\]" /etc/samba/smb.conf ; then
add_samba_share $VOL
sighup_samba
fi
elif [ "$enable_smb" = "disable" ]; then
del_samba_share $VOL
sighup_samba
fi
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