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 _begin_fstest auto quick clone
14 # Import common functions.
18 # real QA test starts here
20 _require_scratch_reflink
23 _scratch_mkfs > $seqres.full 2>&1
24 _scratch_mount >> $seqres.full
25 is_rmap=$($XFS_INFO_PROG $SCRATCH_MNT | grep -c "rmapbt=1")
32 _scratch_xfs_db -c 'agf 1' "$@" -c "p $field" | awk '{print $3}'
40 _scratch_xfs_db -x -c 'agf 1' "$@" -c "write $field -- $value" >> $seqres.full
44 _scratch_xfs_get_sb_field "$@"
48 _scratch_xfs_set_sb_field "$@" >> $seqres.full
52 grep "^leftover" | sed -e "s/[0-9]\+/NR/g"
57 _scratch_xfs_db -c 'sb 0' -c p
59 _scratch_xfs_db -c 'agf 1' -c p
61 _scratch_xfs_db -c 'agf 1' -c 'addr refcntroot' -c p
63 test $is_rmap -gt 0 && _scratch_xfs_db -c 'agf 1' -c 'addr rmaproot' -c p
65 _scratch_xfs_db -c 'agf 1' -c 'addr bnoroot' -c p
67 _scratch_xfs_db -c 'agf 1' -c 'addr cntroot' -c p
70 echo "We need AG1 to have a single free extent"
71 bno_lvl=$(_get_agf_data level -c 'addr bnoroot')
72 bno_nr=$(_get_agf_data numrecs -c 'addr bnoroot')
73 refc_lvl=$(_get_agf_data level -c 'addr refcntroot')
74 refc_nr=$(_get_agf_data numrecs -c 'addr refcntroot')
76 test $bno_lvl -eq 0 || echo " AG 1 bnobt must only have one level"
77 test $bno_nr -eq 1 || echo " AG 1 bnobt must only have one record"
78 test $refc_lvl -eq 0 || echo " AG 1 refcountbt must only have one level"
79 test $refc_nr -eq 0 || echo " AG 1 refcountbt must only have one record"
81 if [ $is_rmap -gt 0 ]; then
82 rmap_lvl=$(_get_agf_data level -c 'addr rmaproot')
83 rmap_nr=$(_get_agf_data numrecs -c 'addr rmaproot')
84 test $rmap_lvl -eq 0 || echo " AG 1 rmapbt must only have one level"
87 echo "Find our extent and old counter values"
88 bno=$(_get_agf_data "recs[1].startblock" -c 'addr bnoroot')
89 len=$(_get_agf_data "recs[1].blockcount" -c 'addr bnoroot')
90 agf_freeblks=$(_get_agf_data freeblks)
91 sb_fdblocks=$(_get_sb_data fdblocks)
93 test $len -ge 200 || echo " AG 1 doesn't have enough free blocks"
95 # Take the last 100 blocks of the free extent
97 debris_bno=$((bno + len - debris_len))
99 echo "Remove the extent from the freesp btrees"
100 _set_agf_data "recs[1].blockcount" $((len - debris_len)) -c 'addr bnoroot'
101 _set_agf_data "recs[1].blockcount" $((len - debris_len)) -c 'addr cntroot'
102 _set_agf_data longest $((len - debris_len))
103 _set_agf_data freeblks $((agf_freeblks - debris_len))
104 _set_sb_data fdblocks $((sb_fdblocks - debris_len))
106 echo "Add the extent to the refcount btree"
107 _set_agf_data numrecs 1 -c 'addr refcntroot'
108 _set_agf_data "recs[1].startblock" $debris_bno -c 'addr refcntroot'
109 _set_agf_data "recs[1].blockcount" $debris_len -c 'addr refcntroot'
110 _set_agf_data "recs[1].refcount" 1 -c 'addr refcntroot'
111 _set_agf_data "recs[1].cowflag" 1 -c 'addr refcntroot'
113 if [ $is_rmap -gt 0 ]; then
114 rmap_nr=$((rmap_nr + 1))
115 _set_agf_data numrecs $rmap_nr -c 'addr rmaproot'
116 _set_agf_data "recs[$rmap_nr].startblock" $debris_bno -c 'addr rmaproot'
117 _set_agf_data "recs[$rmap_nr].blockcount" $debris_len -c 'addr rmaproot'
118 _set_agf_data "recs[$rmap_nr].owner" -9 -c 'addr rmaproot'
119 _set_agf_data "recs[$rmap_nr].offset" 0 -c 'addr rmaproot'
122 _dump_status "broken fs config" >> $seqres.full
124 echo "Look for leftover warning in xfs_check"
125 _scratch_xfs_check | _filter_leftover
127 echo "Look for leftover warning in xfs_repair"
128 _scratch_xfs_repair -n 2>&1 | _filter_leftover
130 echo "Fix filesystem"
131 _scratch_xfs_repair >> $seqres.full 2>&1 || echo "xfs_repair failed?"
133 _dump_status "supposedly fixed fs config" >> $seqres.full
135 echo "Look for no more leftover warning in xfs_check"
136 _scratch_xfs_check | _filter_leftover
138 echo "Look for no more leftover warning in xfs_repair"
139 _scratch_xfs_repair -n 2>&1 | _filter_leftover