--- /dev/null
+#!/bin/bash
+# FS QA Test No. xfs/010
+#
+# Test xfs_repair of the free inode btree (finobt). Make a couple targeted
+# corruptions and verify that xfs_repair detects and repairs the filesystem to
+# a consistent state.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2014 Red Hat, Inc. 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!
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/repair
+
+_cleanup()
+{
+ cd /
+ umount $SCRATCH_MNT 2>/dev/null
+ rm -f $tmp.*
+}
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+_sparse_inode_populate()
+{
+ dir=$1
+ count=$2
+
+ for i in $(seq 0 $count)
+ do
+ touch $dir/$i
+ done
+
+ # Inode chunks are allocated 64 inodes at a time. If we remove 1 out of
+ # every 32 we allocated above, we'll end up leaving an inode or two free
+ # in each chunk. This ensures that most records are inserted into the
+ # finobt.
+ for i in $(seq 0 32 $count)
+ do
+ rm -f $dir/$i
+ done
+}
+
+_filter_dbval()
+{
+ awk '{ print $3 }'
+}
+
+_corrupt_finobt_records()
+{
+ dev=$1
+
+ # determine the root block of the finobt
+ free_root=`$XFS_DB_PROG -c "agi 0" -c "p free_root" $dev |
+ _filter_dbval`
+
+ # Corrupt a freecount value. This should never exceed 64.
+ $XFS_DB_PROG -x -c "fsb $free_root" -c "type inobt" \
+ -c "write recs[1].freecount 70" $dev
+
+ # Create a corrupted non-free record, which should never appear in the
+ # finobt.
+ $XFS_DB_PROG -x -c "fsb $free_root" -c "type inobt" \
+ -c "write recs[2].freecount 0" $dev
+ $XFS_DB_PROG -x -c "fsb $free_root" -c "type inobt" \
+ -c "write recs[2].free 0" $dev
+}
+
+_corrupt_finobt_root()
+{
+ dev=$1
+
+ # nuke the agi finobt root fields
+ $XFS_DB_PROG -x -c "agi 0" -c "write free_root 0" $dev
+ $XFS_DB_PROG -x -c "agi 0" -c "write free_level 0" $dev
+}
+
+# real QA test starts here
+_supported_fs xfs
+_supported_os Linux
+
+_require_scratch
+_require_xfs_mkfs_finobt
+_require_xfs_finobt
+
+rm -f $seqres.full
+
+_scratch_mkfs_xfs "-m crc=1,finobt=1 -d agcount=2" | _filter_mkfs 2>$seqres.full
+
+# sparsely populate the fs such that we create records with free inodes
+_scratch_mount
+_sparse_inode_populate $SCRATCH_MNT 999
+umount $SCRATCH_MNT
+
+# corrupt some finobt records
+_corrupt_finobt_records $SCRATCH_DEV
+
+# repair should detect the inconsistencies
+_scratch_xfs_repair 2>&1 | _filter_repair
+_check_scratch_fs
+
+# nuke the finobt root, repair will have to regenerate from the inobt
+_corrupt_finobt_root $SCRATCH_DEV
+
+_scratch_xfs_repair 2>&1 | _filter_repair
+_check_scratch_fs
+
+status=0
+exit
--- /dev/null
+QA output created by 010
+meta-data=DDEV isize=XXX agcount=N, agsize=XXX blks
+data = bsize=XXX blocks=XXX, imaxpct=PCT
+ = sunit=XXX swidth=XXX, unwritten=X
+naming =VERN bsize=XXX
+log =LDEV bsize=XXX blocks=XXX
+realtime =RDEV extsz=XXX blocks=XXX, rtextents=XXX
+recs[1].freecount = 70
+recs[2].freecount = 0
+recs[2].free = 0
+Phase 1 - find and verify superblock...
+Phase 2 - using <TYPEOF> log
+ - zero log...
+ - scan filesystem freespace and inode maps...
+finobt ir_freecount/free mismatch, AGNO/INO, freecount 70 nfree 2
+finobt record with no free inodes, AGNO/INO
+ - found root inode chunk
+Phase 3 - for each AG...
+ - scan and clear agi unlinked lists...
+ - process known inodes and perform inode discovery...
+ - process newly discovered inodes...
+Phase 4 - check for duplicate blocks...
+ - setting up duplicate extent list...
+ - check for inodes claiming duplicate blocks...
+Phase 5 - rebuild AG headers and trees...
+ - reset superblock...
+Phase 6 - check inode connectivity...
+ - resetting contents of realtime bitmap and summary inodes
+ - traversing filesystem ...
+ - traversal finished ...
+ - moving disconnected inodes to lost+found ...
+Phase 7 - verify and correct link counts...
+done
+free_root = 0
+free_level = 0
+Phase 1 - find and verify superblock...
+Phase 2 - using <TYPEOF> log
+ - zero log...
+ - scan filesystem freespace and inode maps...
+bad agbno AGBNO for finobt root, agno 0
+ - found root inode chunk
+Phase 3 - for each AG...
+ - scan and clear agi unlinked lists...
+ - process known inodes and perform inode discovery...
+ - process newly discovered inodes...
+Phase 4 - check for duplicate blocks...
+ - setting up duplicate extent list...
+ - check for inodes claiming duplicate blocks...
+Phase 5 - rebuild AG headers and trees...
+ - reset superblock...
+Phase 6 - check inode connectivity...
+ - resetting contents of realtime bitmap and summary inodes
+ - traversing filesystem ...
+ - traversal finished ...
+ - moving disconnected inodes to lost+found ...
+Phase 7 - verify and correct link counts...
+done
projects / xfstests-dev.git / commitdiff