2 # SPDX-License-Identifier: GPL-2.0
3 # Copyright (c) 2016, Oracle and/or its affiliates. All Rights Reserved.
7 # Test recovery of "lost" CoW blocks:
8 # - Use the debugger to fake a leftover CoW extent
9 # - See if xfs_repair fixes it
12 seqres=$RESULT_DIR/$seq
13 echo "QA output created by $seq"
17 status=1 # failure is the default!
18 trap "_cleanup; exit \$status" 0 1 2 3 15
26 # get standard environment, filters and checks
31 # real QA test starts here
33 _require_scratch_reflink
38 _scratch_mkfs > $seqres.full 2>&1
39 _scratch_mount >> $seqres.full
40 is_rmap=$($XFS_INFO_PROG $SCRATCH_MNT | grep -c "rmapbt=1")
47 _scratch_xfs_db -c 'agf 1' "$@" -c "p $field" | awk '{print $3}'
55 _scratch_xfs_db -x -c 'agf 1' "$@" -c "write $field -- $value" >> $seqres.full
59 _scratch_xfs_get_sb_field "$@"
63 _scratch_xfs_set_sb_field "$@" >> $seqres.full
67 grep "^leftover" | sed -e "s/[0-9]\+/NR/g"
72 _scratch_xfs_db -c 'sb 0' -c p
74 _scratch_xfs_db -c 'agf 1' -c p
76 _scratch_xfs_db -c 'agf 1' -c 'addr refcntroot' -c p
78 test $is_rmap -gt 0 && _scratch_xfs_db -c 'agf 1' -c 'addr rmaproot' -c p
80 _scratch_xfs_db -c 'agf 1' -c 'addr bnoroot' -c p
82 _scratch_xfs_db -c 'agf 1' -c 'addr cntroot' -c p
85 echo "We need AG1 to have a single free extent"
86 bno_lvl=$(_get_agf_data level -c 'addr bnoroot')
87 bno_nr=$(_get_agf_data numrecs -c 'addr bnoroot')
88 refc_lvl=$(_get_agf_data level -c 'addr refcntroot')
89 refc_nr=$(_get_agf_data numrecs -c 'addr refcntroot')
91 test $bno_lvl -eq 0 || echo " AG 1 bnobt must only have one level"
92 test $bno_nr -eq 1 || echo " AG 1 bnobt must only have one record"
93 test $refc_lvl -eq 0 || echo " AG 1 refcountbt must only have one level"
94 test $refc_nr -eq 0 || echo " AG 1 refcountbt must only have one record"
96 if [ $is_rmap -gt 0 ]; then
97 rmap_lvl=$(_get_agf_data level -c 'addr rmaproot')
98 rmap_nr=$(_get_agf_data numrecs -c 'addr rmaproot')
99 test $rmap_lvl -eq 0 || echo " AG 1 rmapbt must only have one level"
102 echo "Find our extent and old counter values"
103 bno=$(_get_agf_data "recs[1].startblock" -c 'addr bnoroot')
104 len=$(_get_agf_data "recs[1].blockcount" -c 'addr bnoroot')
105 agf_freeblks=$(_get_agf_data freeblks)
106 sb_fdblocks=$(_get_sb_data fdblocks)
108 test $len -ge 200 || echo " AG 1 doesn't have enough free blocks"
110 # Take the last 100 blocks of the free extent
112 debris_bno=$((bno + len - debris_len))
114 echo "Remove the extent from the freesp btrees"
115 _set_agf_data "recs[1].blockcount" $((len - debris_len)) -c 'addr bnoroot'
116 _set_agf_data "recs[1].blockcount" $((len - debris_len)) -c 'addr cntroot'
117 _set_agf_data longest $((len - debris_len))
118 _set_agf_data freeblks $((agf_freeblks - debris_len))
119 _set_sb_data fdblocks $((sb_fdblocks - debris_len))
121 echo "Add the extent to the refcount btree"
122 _set_agf_data numrecs 1 -c 'addr refcntroot'
123 _set_agf_data "recs[1].startblock" $debris_bno -c 'addr refcntroot'
124 _set_agf_data "recs[1].blockcount" $debris_len -c 'addr refcntroot'
125 _set_agf_data "recs[1].refcount" 1 -c 'addr refcntroot'
126 _set_agf_data "recs[1].cowflag" 1 -c 'addr refcntroot'
128 if [ $is_rmap -gt 0 ]; then
129 rmap_nr=$((rmap_nr + 1))
130 _set_agf_data numrecs $rmap_nr -c 'addr rmaproot'
131 _set_agf_data "recs[$rmap_nr].startblock" $debris_bno -c 'addr rmaproot'
132 _set_agf_data "recs[$rmap_nr].blockcount" $debris_len -c 'addr rmaproot'
133 _set_agf_data "recs[$rmap_nr].owner" -9 -c 'addr rmaproot'
134 _set_agf_data "recs[$rmap_nr].offset" 0 -c 'addr rmaproot'
137 _dump_status "broken fs config" >> $seqres.full
139 echo "Look for leftover warning in xfs_check"
140 _scratch_xfs_check | _filter_leftover
142 echo "Look for leftover warning in xfs_repair"
143 _scratch_xfs_repair -n 2>&1 | _filter_leftover
145 echo "Fix filesystem"
146 _scratch_xfs_repair >> $seqres.full 2>&1 || echo "xfs_repair failed?"
148 _dump_status "supposedly fixed fs config" >> $seqres.full
150 echo "Look for no more leftover warning in xfs_check"
151 _scratch_xfs_check | _filter_leftover
153 echo "Look for no more leftover warning in xfs_repair"
154 _scratch_xfs_repair -n 2>&1 | _filter_leftover