On Mon, May 21, 2018 at 09:58:57AM +0800, Zorro Lang wrote: > There's a situation where the directory structure and the inobt > thinks the inode is free, but the inode on disk thinks it is still > in use. XFS should detect it and prevent the kernel from oopsing > on lookup. > > Signed-off-by: Zorro Lang <zlang@xxxxxxxxxx> Looks fine to me overall, reviews from xfs list would be good. (Add linux-xfs to cc list, and please add fs-specific list to cc when submitting fs-specific patches in future.) > --- > > Hi, > > Re-send this case due to we can use it to test different code > paths, refer to: > https://marc.info/?l=fstests&m=152662117205960&w=2 Would be good to include some information on this, e.g. it's testing the same problem as in xfs/132, but by different code path. And the fix is already in upstream, it'd be good to mention the fix in commit log and/or test description too. > > V2 did below changes: > 1) Fix Copyright > 2) Use 'convert' command of xfs_db to get agino from inode number. > > V1 and related reply as below: > https://marc.info/?l=fstests&m=152229518811044&w=2 > > Thanks, > Zorro > > tests/xfs/999 | 114 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ > tests/xfs/999.out | 2 + > tests/xfs/group | 1 + > 3 files changed, 117 insertions(+) > create mode 100755 tests/xfs/999 > create mode 100644 tests/xfs/999.out > > diff --git a/tests/xfs/999 b/tests/xfs/999 > new file mode 100755 > index 00000000..be26420a > --- /dev/null > +++ b/tests/xfs/999 > @@ -0,0 +1,114 @@ > +#! /bin/bash > +# FS QA Test No. 999 > +# > +# Test a corruption when the directory structure and the inobt thinks the inode > +# is free, but the inode on disk thinks it is still in use. > +# > +#----------------------------------------------------------------------- > +# Copyright (c) 2018 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! > +trap "_cleanup; exit \$status" 0 1 2 3 15 > + > +_cleanup() > +{ > + cd / > + rm -f $tmp.* > +} > + > +# get standard environment, filters and checks > +. ./common/rc > +. ./common/filter > + > +# remove previous $seqres.full before test > +rm -f $seqres.full > + > +# real QA test starts here > + > +# Modify as appropriate. > +_supported_fs xfs > +_supported_os Linux > +_require_scratch_nocheck > +_require_no_xfs_bug_on_assert > + > +_filter_dmesg() No need name local functions with leading underscore. > +{ > + local warn1="Internal error xfs_trans_cancel.*fs/xfs/xfs_trans\.c.*" > + local warn2="WARNING:.*fs/xfs/xfs_message\.c:.*assfail.*" > + > + sed -e "s#$warn1#Intentional error in xfs_trans_cancel#" \ > + -e "s#$warn2#Intentional warnings in assfail#" > +} > + > +# Use crc=0, due to this crash is only possible on v4 XFS or v5 XFS mounted > +# with the ikeep mount option. For all other V5 XFS, this problem cannot > +# occur because we don't read inodes we are allocating from disk - we simply > +# overwrite them with the new inode information. > +_scratch_mkfs_xfs -m crc=0 >> $seqres.full 2>&1 This depends on a recent fix from me for _scratch_mkfs_xfs_opts(), otherwise older mkfs.xfs that doesn't support metadata would fail the mkfs (or use _require_xfs_mkfs_crc as in xfs/132). I'll ping that patch for review. Thanks, Eryu > +blksz=$(_scratch_xfs_get_sb_field blocksize) > +agcount=$(_scratch_xfs_get_sb_field agcount) > + > +_scratch_mount > +# Create a directory for later allocation in same AG (AG 0, due to this's an > +# empty XFS for now) > +mkdir $SCRATCH_MNT/dir > + > +# Allocate 1 block for testfile > +$XFS_IO_PROG -fc 'pwrite 0 $blksz' -c fsync $SCRATCH_MNT/dir/testfile >> $seqres.full > +inum=`stat -c %i $SCRATCH_MNT/dir/testfile` > +_scratch_unmount > + > +# Find the AG which contains testfile > +agi=`_scratch_xfs_db -c "convert inode $inum agno" | sed -e 's/^.*(\([0-9]*\).*$/\1/g'` > + > +# Due to we only allocate 1 block for testfile, and this's the only one data > +# block we use. So we use single level inobt, So the ${agi}->root->recs[1] > +# should be the only one record points the chunk which contains testfile's > +# inode. > +# An exmaple of inode record is as below: > +# recs[1] = [startino,freecount,free] 1:[1024,59,0xffffffffffffffe0] > +freecount=$(_scratch_xfs_get_metadata_field "recs[1].freecount" \ > + "agi $agi" "addr root") > +fmask=$(_scratch_xfs_get_metadata_field "recs[1].free" "agi $agi" "addr root") > + > +# fmask shift right 1 bit, and freecount++, to mark testfile inode as free in > +# inobt. (But the inode itself isn't freed, it still has allocated block) > +freecount="$((freecount + 1))" > +fmask="$((fmask / 2))" > +_scratch_xfs_set_metadata_field "recs[1].freecount" "$freecount" \ > + "agi $agi" "addr root" >/dev/null > +_scratch_xfs_set_metadata_field "recs[1].free" "$fmask" \ > + "agi $agi" "addr root" >/dev/null > + > +# Mount again and create a new inode cover that inode we just 'freed' from inobt > +_scratch_mount > +$XFS_IO_PROG -fc 'pwrite 0 $blksz' -c fsync $SCRATCH_MNT/dir/newfile 2>&1 | \ > + grep -i "Structure needs cleaning" | _filter_scratch > + > +# filter a intentional internal errors > +_check_dmesg _filter_dmesg > + > +# success, all done > +status=0 > +exit > diff --git a/tests/xfs/999.out b/tests/xfs/999.out > new file mode 100644 > index 00000000..cb8d9e34 > --- /dev/null > +++ b/tests/xfs/999.out > @@ -0,0 +1,2 @@ > +QA output created by 999 > +SCRATCH_MNT/dir/newfile: Structure needs cleaning > diff --git a/tests/xfs/group b/tests/xfs/group > index 32bf4f71..ec3cca62 100644 > --- a/tests/xfs/group > +++ b/tests/xfs/group > @@ -442,3 +442,4 @@ > 443 auto quick ioctl fsr > 444 auto quick > 445 auto quick filestreams > +999 auto quick > -- > 2.14.3 > > -- > To unsubscribe from this list: send the line "unsubscribe fstests" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-xfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
