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#! /bin/sh
# This file is part of BEAM
# Copyright (C) 2012-2014 Sergey Poznyakoff
#
# BEAM 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; either version 3, or (at your option)
# any later version.
#
# BEAM 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 BEAM. If not, see <http://www.gnu.org/licenses/>.
# The configuration variable "backup_bucket_name" must contain the name
# of the s3 bucket to use.
# Raw bucket is mounted to /mnt/s3backer
test -z "$backup_mp_s3backer" && backup_mp_s3backer=/mnt/s3backer
# The actual file system is mounted to /mnt/s3
test -z "$backup_mp" && backup_mp_s3=/mnt/s3
s3_getmpoint()
{
case $1 in
# Sample mount output, split into several lines:
# a) With --vhost:
# http://BUCKETNAME.s3.amazonaws.com/ on /mnt/s3backer type fuse.s3backer
# (rw,nosuid,nodev,allow_other,default_permissions)
# b) Without --vhost:
# http://s3.amazonaws.com/BUCKETNAME/ on /mnt/s3backer type fuse.s3backer
# (rw,nosuid,nodev,allow_other,default_permissions)
backer)
mount -tfuse.s3backer |
awk '/https?:\/\/.*'$backup_bucket_name'/ { print $3 }';;
s3)
s=$(mount | grep "^${backup_mp_s3backer}/file" | awk '{ print $3 }')
if [ -z "$s" ]; then
# Some kernels print device name instead of the actual mount file:
s=$(mount | grep "^/dev/loop[0-9] on ${backup_mp_s3}" |
awk '{ print $3 }')
fi
echo $s;;
*)
abent 1 "invalid usage of getmpoint"
esac
}
# This variable is populated by s3_mount and is used by s3_unmount to unmount
# s3-backed file system.
umount_list=""
s3_mount() {
# Make sure both mountpoints exist
test -d $backup_mp_s3backer || mkdir $backup_mp_s3backer
test -d $backup_mp_s3 || mkdir $backup_mp_s3
set -- $(s3_getmpoint backer)
if test -z "$1"; then
$dry_run s3backer $backup_s3backer_options \
$backup_bucket_name $backup_mp_s3backer ||
abend 1 "unable to mount $backup_bucket_name"
umount_list="$backup_mp_s3backer"
else
backup_mp_s3backer=$1
fi
set -- $(s3_getmpoint s3)
if test -z "$1"; then
case $(basename $0) in
beam-restore|restore) mountopt=",ro";;
beam-backup|backup) mountopt=",rw";;
beam-s3) ;;
*) error "called as $0: assuming default mount options"
esac
test -n "$backup_s3_mount_options" &&
mountopt="$mountopt,$backup_s3_mount_options"
# NOTE: For ext4 add the journal_async_commit option.
$dry_run mount -oloop$mountopt \
$backup_mp_s3backer/file $backup_mp_s3 ||
abend 1 "unable to mount $backup_mp_s3backer/file"
umount_list="$backup_mp_s3 $umount_list"
else
backup_mp_s3=$1
fi
epilogue_hook="s3_unmount $epilogue_hook"
}
s3_unmount()
{
if test "$1" = "--force"; then
for id in s3 backer
do
mpoint=$(s3_getmpoint $id)
test -n "$mpoint" && $dry_run umount $mpoint
done
else
for mpoint in $umount_list
do
test -n "$mpoint" && $dry_run umount $mpoint
done
fi
}
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