| #! /bin/bash |
| # FS QA Test No. 307 |
| # |
| # Test recovery of "lost" CoW blocks: |
| # - Use the debugger to fake a leftover CoW extent |
| # - See if xfs_repair fixes it |
| # |
| #----------------------------------------------------------------------- |
| # Copyright (c) 2016, Oracle and/or its affiliates. All Rights Reserved. |
| # |
| # 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. |
| # |
| # This program is distributed in the hope that it would 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, write the Free Software Foundation, |
| # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| #----------------------------------------------------------------------- |
| |
| seq=`basename $0` |
| seqres=$RESULT_DIR/$seq |
| echo "QA output created by $seq" |
| |
| here=`pwd` |
| tmp=/tmp/$$ |
| status=1 # failure is the default! |
| trap "_cleanup; exit \$status" 0 1 2 3 15 |
| |
| _cleanup() |
| { |
| cd / |
| rm -rf $tmp.* |
| } |
| |
| # get standard environment, filters and checks |
| . ./common/rc |
| . ./common/filter |
| . ./common/reflink |
| |
| # real QA test starts here |
| _supported_os Linux |
| _supported_fs xfs |
| _require_scratch_reflink |
| |
| rm -f $seqres.full |
| |
| echo "Format" |
| _scratch_mkfs > $seqres.full 2>&1 |
| _scratch_mount >> $seqres.full |
| is_rmap=$(xfs_info $SCRATCH_MNT | grep -c "rmapbt=1") |
| _scratch_unmount |
| |
| _get_agf_data() { |
| field="$1" |
| shift |
| |
| _scratch_xfs_db -c 'agf 1' "$@" -c "p $field" | awk '{print $3}' |
| } |
| |
| _set_agf_data() { |
| field="$1" |
| value="$2" |
| shift; shift |
| |
| _scratch_xfs_db -x -c 'agf 1' "$@" -c "write $field -- $value" >> $seqres.full |
| } |
| |
| _get_sb_data() { |
| field="$1" |
| shift |
| |
| _scratch_xfs_db -c 'sb 0' "$@" -c "p $field" | awk '{print $3}' |
| } |
| |
| _set_sb_data() { |
| field="$1" |
| value="$2" |
| shift; shift |
| |
| _scratch_xfs_db -x -c 'sb 0' "$@" -c "write $field -- $value" >> $seqres.full |
| } |
| |
| _filter_leftover() { |
| grep "^leftover" | sed -e "s/[0-9]\+/NR/g" |
| } |
| |
| _dump_status() { |
| echo "** " "$@" |
| _scratch_xfs_db -c 'sb 0' -c p |
| echo "** agf header" |
| _scratch_xfs_db -c 'agf 1' -c p |
| echo "** refcntbt" |
| _scratch_xfs_db -c 'agf 1' -c 'addr refcntroot' -c p |
| echo "** rmapbt" |
| test $is_rmap -gt 0 && _scratch_xfs_db -c 'agf 1' -c 'addr rmaproot' -c p |
| echo "** bnobt" |
| _scratch_xfs_db -c 'agf 1' -c 'addr bnoroot' -c p |
| echo "** cntbt" |
| _scratch_xfs_db -c 'agf 1' -c 'addr cntroot' -c p |
| } |
| |
| echo "We need AG1 to have a single free extent" |
| bno_lvl=$(_get_agf_data level -c 'addr bnoroot') |
| bno_nr=$(_get_agf_data numrecs -c 'addr bnoroot') |
| refc_lvl=$(_get_agf_data level -c 'addr refcntroot') |
| refc_nr=$(_get_agf_data numrecs -c 'addr refcntroot') |
| |
| test $bno_lvl -eq 0 || echo " AG 1 bnobt must only have one level" |
| test $bno_nr -eq 1 || echo " AG 1 bnobt must only have one record" |
| test $refc_lvl -eq 0 || echo " AG 1 refcountbt must only have one level" |
| test $refc_nr -eq 0 || echo " AG 1 refcountbt must only have one record" |
| |
| if [ $is_rmap -gt 0 ]; then |
| rmap_lvl=$(_get_agf_data level -c 'addr rmaproot') |
| rmap_nr=$(_get_agf_data numrecs -c 'addr rmaproot') |
| test $rmap_lvl -eq 0 || echo " AG 1 rmapbt must only have one level" |
| fi |
| |
| echo "Find our extent and old counter values" |
| bno=$(_get_agf_data "recs[1].startblock" -c 'addr bnoroot') |
| len=$(_get_agf_data "recs[1].blockcount" -c 'addr bnoroot') |
| agf_freeblks=$(_get_agf_data freeblks) |
| sb_fdblocks=$(_get_sb_data fdblocks) |
| |
| test $len -ge 200 || echo " AG 1 doesn't have enough free blocks" |
| |
| # Take the last 100 blocks of the free extent |
| debris_len=100 |
| debris_bno=$((bno + len - debris_len)) |
| |
| echo "Remove the extent from the freesp btrees" |
| _set_agf_data "recs[1].blockcount" $((len - debris_len)) -c 'addr bnoroot' |
| _set_agf_data "recs[1].blockcount" $((len - debris_len)) -c 'addr cntroot' |
| _set_agf_data freeblks $((agf_freeblks - debris_len)) |
| _set_agf_data longest $((len - debris_len)) |
| _set_sb_data fdblocks $((sb_fdblocks - debris_len)) |
| |
| echo "Add the extent to the refcount btree" |
| _set_agf_data numrecs 1 -c 'addr refcntroot' |
| _set_agf_data "recs[1].startblock" $debris_bno -c 'addr refcntroot' |
| _set_agf_data "recs[1].blockcount" $debris_len -c 'addr refcntroot' |
| _set_agf_data "recs[1].refcount" 1 -c 'addr refcntroot' |
| _set_agf_data "recs[1].cowflag" 1 -c 'addr refcntroot' |
| |
| if [ $is_rmap -gt 0 ]; then |
| rmap_nr=$((rmap_nr + 1)) |
| _set_agf_data numrecs $rmap_nr -c 'addr rmaproot' |
| _set_agf_data "recs[$rmap_nr].startblock" $debris_bno -c 'addr rmaproot' |
| _set_agf_data "recs[$rmap_nr].blockcount" $debris_len -c 'addr rmaproot' |
| _set_agf_data "recs[$rmap_nr].owner" -9 -c 'addr rmaproot' |
| _set_agf_data "recs[$rmap_nr].offset" 0 -c 'addr rmaproot' |
| fi |
| |
| _dump_status "broken fs config" >> $seqres.full |
| |
| echo "Look for leftover warning in xfs_check" |
| _scratch_xfs_check | _filter_leftover |
| |
| echo "Look for leftover warning in xfs_repair" |
| _scratch_xfs_repair -n 2>&1 | _filter_leftover |
| |
| echo "Fix filesystem" |
| _scratch_xfs_repair >> $seqres.full 2>&1 || echo "xfs_repair failed?" |
| |
| _dump_status "supposedly fixed fs config" >> $seqres.full |
| |
| echo "Look for no more leftover warning in xfs_check" |
| _scratch_xfs_check | _filter_leftover |
| |
| echo "Look for no more leftover warning in xfs_repair" |
| _scratch_xfs_repair -n 2>&1 | _filter_leftover |
| |
| # success, all done |
| status=0 |
| exit |