X-Git-Url: https://iankelling.org/git/?a=blobdiff_plain;f=mount-latest-subvol;h=c66eebc1bd0a97d9cb8513cbedc2a4d4b9faf8ae;hb=50f25d1eec109c4596cfc638c9a7c98da0f0b5d0;hp=0e456a2407728610c3b77ad40af8572b4b85781e;hpb=2632836241e21fb97fa826b64a1886353bacd84f;p=distro-setup
diff --git a/mount-latest-subvol b/mount-latest-subvol
index 0e456a2..c66eebc 100644
--- a/mount-latest-subvol
+++ b/mount-latest-subvol
@@ -1,24 +1,29 @@
#!/bin/bash
-# Copyright (C) 2016 Ian Kelling
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-# http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+
+# On Ian's computers, mount received subvolumes after btrbk.
+# Copyright (C) 2024 Ian Kelling
+
+# 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, either version 3 of the License, or
+# (at your option) any later version.
+
+# 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, see .
+
+# SPDX-License-Identifier: GPL-3.0-or-later
this_file="$(readlink -f -- "${BASH_SOURCE[0]}")"
readonly this_file
cd /
[[ $EUID == 0 ]] || exec sudo -E "$this_file" "$@"
-source /usr/local/lib/err
+set -e; . /usr/local/lib/bash-bear; set +e
usage() {
cat <=0; i--)); do
- if [[ $parentid == $(btrfs sub show ${bsubs[i]} | awk '$1 == "UUID:" {print $2}') ]]; then
- bsub=${bsubs[i]}
- break
- fi
- done
- if [[ $bsub ]]; then
- # in testing, same subvol is 136 bytes. allow some overhead. 32 happens sometimes under systemd.
- # $ errno 32
- # EPIPE 32 Broken pipe
- lines=$(btrfs send --no-data -p $bsub $leaf | btrfs receive --dump | head -n 100 | wc -l || [[ $? == 141 || ${PIPESTATUS[0]} == 32 ]])
- if [[ $lines == 0 ]]; then
- # example output of no differences:
- # snapshot ./qrtest uuid=c41ff6b7-0527-f34d-95ac-190eecf54ff5 transid=2239 parent_uuid=64949e1b-4a3e-3945-9a8e-cd7b7c15d7d6 parent_transid=2239
- echo suspected identical: $bsub $leaf
- x btrfs sub del $leaf
+ else
+ leaf=$vol.leaf.$(date +%Y-%m-%dT%H:%M:%S%z)
+ m mv $vol $leaf
+ m btrfs property set -ts $leaf ro true
+
+ ### begin check if leaf is different, delete it if not ###
+ parentid=$(btrfs sub show $leaf | awk '$1 == "Parent" && $2 == "UUID:" {print $3}')
+ bsubs=(btrbk/$vol.*)
+ bsub= # base subvolume
+ # go in reverse order as its more likely to be at the end
+ for ((i=${#bsubs[@]}-1; i>=0; i--)); do
+ if [[ $parentid == $(btrfs sub show ${bsubs[i]} | awk '$1 == "UUID:" {print $2}') ]]; then
+ bsub=${bsubs[i]}
+ break
+ fi
+ done
+ if [[ $bsub ]]; then
+ # in testing, same subvol is 136 bytes. allow some overhead. 32 happens sometimes under systemd.
+ # $ errno 32
+ # EPIPE 32 Broken pipe
+ lines=$(btrfs send --no-data -p $bsub $leaf | btrfs receive --dump | head -n 100 | wc -l || [[ $? == 141 || ${PIPESTATUS[0]} == 32 ]])
+ if [[ $lines == 0 ]]; then
+ # example output of no differences:
+ # snapshot ./qrtest uuid=c41ff6b7-0527-f34d-95ac-190eecf54ff5 transid=2239 parent_uuid=64949e1b-4a3e-3945-9a8e-cd7b7c15d7d6 parent_transid=2239
+ echo suspected identical: $bsub $leaf
+ x btrfs sub del $leaf
+ fi
fi
+ ### end check if leaf is different, delete it if not ###
+
+ ## begin expire leaf vols ##
+ leaf_vols=($vol.leaf.*)
+ count=${#leaf_vols[@]}
+ leaf_limit_time=$(( EPOCHSECONDS - 60*60*24*60 )) # 60 days
+ leaf_new_limit_time=$(( EPOCHSECONDS - 60*60*24 * 5 )) # 5 days this
+ # goes backwards from oldest. leaf_new_limit_time is a safety
+ # measure to ensure we don't delete very recent leafs.
+ for leaf in ${leaf_vols[@]}; do
+ leaf_time=$(date -d ${leaf#"$vol".leaf.} +%s)
+ if (( leaf_limit_time > leaf_time || ( leaf_new_limit_time > leaf_time && count > 30 ) )); then
+ x btrfs sub del $leaf
+ fi
+ count=$((count-1))
+ done
fi
- ### end check if leaf is different, delete it if not ###
-
- ## begin expire leaf vols ##
- leaf_vols=($vol.leaf.*)
- count=${#leaf_vols[@]}
- leaf_limit_time=$(( EPOCHSECONDS - 60*60*24*60 )) # 60 days
- leaf_new_limit_time=$(( EPOCHSECONDS - 60*60*24 * 5 )) # 5 days this
- # goes backwards from oldest. leaf_new_limit_time is a safety
- # measure to ensure we don't delete very recent leafs.
- for leaf in ${leaf_vols[@]}; do
- leaf_time=$(date -d ${leaf#"$vol".leaf.} +%s)
- if (( leaf_limit_time > leaf_time || ( leaf_new_limit_time > leaf_time && count > 30 ) )); then
- x btrfs sub del $leaf
- fi
- count=$((count-1))
- done
## end expire leaf vols ##
fi
#### end dealing with leaf vols ####
@@ -476,7 +507,7 @@ for dir in /mnt/r7/amy/{root/root,boot/boot}_ubuntubionic /mnt/{root2/root,boot2
rm -f /nocow/btrfs-stale/$vol
done
-if (( $ret )); then
+if (( ret >= 1 )); then
echo "$0: exit status $ret. see error above"
fi
exit $ret