rzerres/dsnap-sync
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dsnap-sync: inculde btrfs quota check

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* get size of snapshot from 'btrfs qgroup show' function
* precise size information needs sync, which can take a while
  but is far cheeper then du --sum on big subvolume

Signed-off-by: Ralf Zerres <ralf.zerres@networkx.de>
This commit is contained in:
Ralf Zerres
2018-07-27 17:20:05 +02:00
parent c4244cb34d
commit 37264eb4f5
1 changed files with 54 additions and 3 deletions
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57
bin/dsnap-sync
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@@ -178,7 +178,10 @@ create_snapshot () {
fi
snapper_source_snapshot=$SUBVOLUME/.snapshots/$snapper_source_id/snapshot
snapper_source_info=$SUBVOLUME/.snapshots/$snapper_source_id/info.xml
btrfs quota enable $snapper_source_snapshot
sync
if [ $verbose -ge 3 ]; then
printf "${MAGENTA}Snapper source snapshot ${GREEN}'%s'${MAGENTA} created${NO_COLOR}\n" "$snapper_source_id"
fi
@@ -1156,9 +1159,57 @@ run_backup () {
;;
esac
# TODO: to report correct values btrfs-quota must be activated for the source subvol!
snapper_source_snapshot_size=$(du --sum $snapper_source_snapshot 2>/dev/null | awk -F ' ' '{print $1}')
snapper_source_snapshot_size=$(($snapper_source_snapshot_size / 1024 / 1024))G
# report correct subvolume size via btrfs quota
if [ $verbose -ge 2 ]; then
printf "${MAGENTA}Get size for given source snapshot (id=${GREEN}'%s'${MAGENTA}, path=${GREEN}'%s'${MAGENTA})${NO_COLOR} ...\n" \
"$snapper_source_id" "$snapper_source_snapshot"
fi
cmd=$(eval btrfs qgroup show -f --raw $snapper_source_snapshot 2>/dev/null | grep -q 'quotas not enabled')
if [ $verbose -ge 3 ]; then
printf "${MAGENTA}BTRFS qgroiup show result: ${GREEN}'%s', '%s'${NO_COLOR}\n" \
"$?" "$cmd"
fi
#if [ $? -eq 1 ]; then
# subvolume is not configured for quota, (temporary?) enable that
#btrfs_quota_tmp=1
#btrfs quota enable $snapper_source_snapshot 2>/dev/null
#btrfs quota rescan -w $snapper_source_snapshot 2>/dev/null
# TODO: until a rescan is not completed, given feedback is not precisely correct
# do we accept to wait?
#cmd=$(btrfs qgroup show --sync -f --gbytes $snapper_source_snapshot 2>/dev/null
# | grep -q -e "rescan is running" -e "data inconsistent")
#$(eval $cmd)
#if [ $? -eq 1 ]; then
# if [ $verbose -ge 3 ]; then
# printf "${RED}WIP:${NO_COLOR} Quota was disabled. Waiting for rescan to finish ...\n"
# fi
# while true; do
# sleep 2
# $(eval $cmd)
# if [ $? -eq 0 ]; then
# break
# fi
# done
#fi
#fi
# qgroup for given path, exclude ancestrals
# qgroup identifiers conform to level/id where level 0 is reserved to the qgroups associated with subvolumes
# need to substitue btrfs 'GiB' suffix, since pv will need 'G'
snapper_source_snapshot_size=$(eval btrfs qgroup show -f --gbytes $snapper_source_snapshot 2>/dev/null \
| awk 'FNR>2 { gsub(/.[0-9][0-9]GiB/,"G"); print $2}')
if [ $verbose -ge 2 ]; then
printf "${MAGENTA}BTRFS quota size for ${GREEN}source snapshot${MAGENTA}: id=${GREEN}'%s'${MAGENTA}, size=${GREEN}'%s'${NO_COLOR} ...\n" \
"$snapper_source_id" "$snapper_source_snapshot_size"
fi
# should we disable quota usage again?
#if [ $btrfs_quota_tmp -eq 1 ]; then btrfs quota disable $snapper_source_snapshot; fi
#snapper_source_snapshot_size=$(du --sum $snapper_source_snapshot 2>/dev/null \
# | awk -F ' ' '{print $1}')
#snapper_source_snapshot_size=$(($snapper_source_snapshot_size / 1024 / 1024))G
# settings for interactive progress status
if [ $do_pv_cmd -eq 1 ]; then