On 10/3/22 18:04, Darrick J. Wong wrote: > On Sun, Oct 02, 2022 at 12:27:08PM +0800, Zorro Lang wrote: >> On Fri, Sep 30, 2022 at 11:01:51AM -0400, Hironori Shiina wrote: >>> >>> >>> On 9/28/22 21:49, Zorro Lang wrote: >>>> On Wed, Sep 28, 2022 at 05:03:37PM -0400, Hironori Shiina wrote: >>>>> Test '-x' option of xfsrestore. With this option, a wrong root inode >>>>> number is corrected. A root inode number can be wrong in a dump created >>>>> by problematic xfsdump (v3.1.7 - v3.1.9) with blukstat misuse. This >>>>> patch adds a dump with a wrong inode number created by xfsdump 3.1.8. >>>>> >>>>> Link: https://lore.kernel.org/linux-xfs/20201113125127.966243-1-hsiangkao@xxxxxxxxxx/ >>>>> Signed-off-by: Hironori Shiina <shiina.hironori@xxxxxxxxxxx> >>>>> --- >>>>> common/dump | 2 +- >>>>> src/root-inode-broken-dumpfile | Bin 0 -> 21648 bytes >>>>> tests/xfs/554 | 37 +++++++++++++++++++++ >>>>> tests/xfs/554.out | 57 +++++++++++++++++++++++++++++++++ >>>>> 4 files changed, 95 insertions(+), 1 deletion(-) >>>>> create mode 100644 src/root-inode-broken-dumpfile >>>>> create mode 100644 tests/xfs/554 >>>>> create mode 100644 tests/xfs/554.out >>>>> >>>>> diff --git a/common/dump b/common/dump >>>>> index 8e0446d9..50b2ba03 100644 >>>>> --- a/common/dump >>>>> +++ b/common/dump >>>>> @@ -1003,7 +1003,7 @@ _parse_restore_args() >>>>> --no-check-quota) >>>>> do_quota_check=false >>>>> ;; >>>>> - -K|-R) >>>>> + -K|-R|-x) >>>>> restore_args="$restore_args $1" >>>>> ;; >>>>> *) >>>>> diff --git a/src/root-inode-broken-dumpfile b/src/root-inode-broken-dumpfile >>>>> new file mode 100644 >>>>> index 0000000000000000000000000000000000000000..9a42e65d8047497be31f3abbaf4223ae384fd14d >>>>> GIT binary patch >>>>> literal 21648 >>>>> zcmeI)K}ge49KiAC_J<CEBr!0AwBf~zbCHB}5DyxL6eU8Jnqylvayj;2VuG+d)TN6; >>>>> z5J8vlAaw9hXi(UousT$Sin@BRJfwHM)O+*2*njz_zc+h*ckuV#@BMuKe;;JbgTL{< >>>>> z!SwZ9zC#ERe%reLe5&cz2e}qM<!i2dXQHt^{^`d1Qx{)MMzW#$%dR@J={0`IRsGx4 >>>>> z(yn@Oi-nBqCOVIG?&{kpwnv~&w_>6_ozY1^fph=w8(=^oTg&wOe=(WQByyQ_Hfd|4 >>>>> z^o76<0!zn#v>k3blbU)nzx=KF^}-G%R;OaQYsHwGDkO`kD^@q^(_Ac_8H<gKj^>a0 >>>>> z6p*%BK>q#b>2EE%^!@f?Z`-p+tI@M}qmMm@zMJk>K1U^=d~G^NUG?X4vkvKtOf-3Y >>>>> zpVM9YgM9Y7{*P0ApJNUh^uk1wCnA6V0tg_000IagfB*srAb<b@2q1s}0tg_000Iag >>>>> zfB*srAb<b@2q1s}0tg_000IagfB*srAb<b@2q1s}0tg_000IagfB*srAb`MM1p>_h >>>>> z2-R=Q9ooK1{l9<Dy8IIMUVXr9BW9uI1x7};j+kij|5kLI^32no;n|PvqD74ZOlJ#n >>>>> z0-~CKSlx#liMS>jt232#==00xPqwp;gsZrjc?`PPxaCE~>3(^o5-%+Nj=HegJFK2b >>>>> z=l5zT4IDgO=sJ1zp=jyrALvcQJK|j;sN2_jUmobjN<!S6m1{G<LZ^+JP;T!|3{9)w >>>>> eGf&ioo}iw|li2&4IyG;z<}vrl)Mic2`t2{52##q0 >>>>> >>>>> literal 0 >>>>> HcmV?d00001 >>>> >>>> Please don't try to add a binary file to fstests directly. >>>> >>>>> >>>>> diff --git a/tests/xfs/554 b/tests/xfs/554 >>>>> new file mode 100644 >>>>> index 00000000..13bc62c7 >>>>> --- /dev/null >>>>> +++ b/tests/xfs/554 >>>>> @@ -0,0 +1,37 @@ >>>>> +#! /bin/bash >>>>> +# SPDX-License-Identifier: GPL-2.0 >>>>> +# Copyright (c) 2022 Fujitsu Limited. All Rights Reserved. >>>>> +# >>>>> +# FS QA Test No. 554 >>>>> +# >>>>> +# Test restoring a dumpfile with a wrong root inode number created by >>>>> +# xfsdump 3.1.8. >>>>> +# This test restores the checked-in broken dump with '-x' flag. >>>>> +# >>>>> + >>>>> +. ./common/preamble >>>>> +_begin_fstest auto quick dump >>>>> + >>>>> +# Import common functions. >>>>> +. ./common/dump >>>>> + >>>>> +# real QA test starts here >>>>> +_supported_fs xfs >>>>> +_require_scratch >>>> >>>> The -x option is a new feature for xfsdump, not all system support that. So >>>> we need to _notrun if test on a system doesn't support it. A separated >>>> _require_* helper would be better if there'll be more testing about this >>>> new feature. Or a local detection in this case is fine too (can be moved as >>>> a common helper later). >>>> >>>>> +_scratch_mkfs_xfs >>$seqres.full || _fail "mkfs failed" >>>>> +_scratch_mount >>>>> + >>>>> +# Create dumpdir for comparing with restoredir >>>>> +rm -rf $dump_dir >>>>> +mkdir $dump_dir || _fail "failed to mkdir $restore_dir" >>>> ^^ ^^ >>>> >>>> Are you trying to create a dump dir or restore dir? >>>> >>>>> +touch $dump_dir/FILE_1019 >>>>> + >>>>> +_do_restore_toc -x -f $here/src/root-inode-broken-dumpfile >>>> >>>> Why I didn't see how you generate this broken dumpfile in this case? >>>> >>>> Oh... I see, you want to store a dumpfile in fstests source code directly. >>>> I thought you submited that file accidentally... >>>> >>>> No, we don't do things like this way, please try to generate the dumpfile >>>> in this test case at first, then restore it. For example using xfs_db to >>>> break a xfs, or using some tricky method (likes xfs/545). >>>> >>> >>> Thank you for the comments. I will try another approach. I'm having >>> trouble creating a dumpfile for this test. Because xfsdump was already >>> fixed, xfsdump no longer generates a corrupted dumpfile even if there is >>> a lower inode number than a root inode. >> >> Oh, I see. You can try, but I think it's hard. It maybe not suitable to be a >> fstests case, if it has to depend on a binary fs dump file. If so, We can cover >> it on other place, with this existed "bad" dump file. > > How difficult is it to create a dumpfile with a broken root inode? > Is it a simple matter of creating a good dump and patching a few bytes, > or do we end up having to patch the whole file? > > (The reason I ask is that I've heard about this problem for ages but > I don't actually know how to create a bad dump...) > As I dug into the data structure, I succeeded in creating a dumpfile with a wrong root inode by modifying `content_inode_hdr_t.cih_rootino` and `global_hdr_t.gh_checksum`. After creating a inode with a lower number than the root inode with the method in generic/545, I modified a dumpfile as follows: --- _do_dump_file # Break dumpfile old_checksum=$(od -A n -j 12 -N 4 -i --endian=big $dump_file) gap=$(($root_inum - $inum)) new_checksum=$(($old_checksum + ($gap >> 32) + ($gap & 0x00000000ffffffff))) v=($(printf "%016x" $inum | awk -v FS='' '{for (i=1; i<=NF; i+=2) print $i$(i+1)}')) echo -en "\x${v[0]}\x${v[1]}\x${v[2]}\x${v[3]}\x${v[4]}\x${v[5]}\x${v[6]}\x${v[7]}" | dd of=$dump_file bs=1 seek=3928 conv=notrunc v=($(printf "%016x" $new_checksum | awk -v FS='' '{for (i=9; i<=NF; i+=2) print $i$(i+1)}')) echo -en "\x${v[0]}\x${v[1]}\x${v[2]}\x${v[3]}" | dd of=$dump_file bs=1 seek=12 conv=notrunc _do_restore_file -x --- (I'm afraid I'm not so familiar with editing a binary file.) The offset of `global_hdr_t.gh_checksum` is 12. The offset of `content_inode_hdr_t.cih_rootino` is: global_hdr_t.gh_upper (0x400) + drive_hdr_t.dh_upper (0x400) + media_hdr_t.mh_upper (0x400) + content_hdr_t.ch_specific (0x340) + content_inode_hdr_t.cih_rootino (0x18) = 0xf58 (3928) Thanks, Hiro > --D > >> Thanks, >> Zorro >> >>> >>>>> + >>>>> +_do_restore_file -x -f $here/src/root-inode-broken-dumpfile -L stress_545 >>>>> +_diff_compare_sub >>>>> +_ls_nodate_compare_sub >>>>> + >>>>> +# success, all done >>>>> +status=0 >>>>> +exit >>>>> diff --git a/tests/xfs/554.out b/tests/xfs/554.out >>>>> new file mode 100644 >>>>> index 00000000..40a3f3a4 >>>>> --- /dev/null >>>>> +++ b/tests/xfs/554.out >>>>> @@ -0,0 +1,57 @@ >>>>> +QA output created by 554 >>>>> +Contents of dump ... >>>>> +xfsrestore -x -f DUMP_FILE -t >>>>> +xfsrestore: using file dump (drive_simple) strategy >>>>> +xfsrestore: searching media for dump >>>>> +xfsrestore: examining media file 0 >>>>> +xfsrestore: dump description: >>>>> +xfsrestore: hostname: xfsdump >>>>> +xfsrestore: mount point: SCRATCH_MNT >>>>> +xfsrestore: volume: SCRATCH_DEV >>>>> +xfsrestore: session time: TIME >>>>> +xfsrestore: level: 0 >>>>> +xfsrestore: session label: "stress_545" >>>>> +xfsrestore: media label: "stress_tape_media" >>>>> +xfsrestore: file system ID: ID >>>>> +xfsrestore: session id: ID >>>>> +xfsrestore: media ID: ID >>>>> +xfsrestore: searching media for directory dump >>>>> +xfsrestore: reading directories >>>>> +xfsrestore: found fake rootino #128, will fix. >>>>> +xfsrestore: fix root # to 1024 (bind mount?) >>>>> +xfsrestore: 2 directories and 2 entries processed >>>>> +xfsrestore: directory post-processing >>>>> +xfsrestore: reading non-directory files >>>>> +xfsrestore: table of contents display complete: SECS seconds elapsed >>>>> +xfsrestore: Restore Status: SUCCESS >>>>> + >>>>> +dumpdir/FILE_1019 >>>>> +Restoring from file... >>>>> +xfsrestore -x -f DUMP_FILE -L stress_545 RESTORE_DIR >>>>> +xfsrestore: using file dump (drive_simple) strategy >>>>> +xfsrestore: searching media for dump >>>>> +xfsrestore: examining media file 0 >>>>> +xfsrestore: found dump matching specified label: >>>>> +xfsrestore: hostname: xfsdump >>>>> +xfsrestore: mount point: SCRATCH_MNT >>>>> +xfsrestore: volume: SCRATCH_DEV >>>>> +xfsrestore: session time: TIME >>>>> +xfsrestore: level: 0 >>>>> +xfsrestore: session label: "stress_545" >>>>> +xfsrestore: media label: "stress_tape_media" >>>>> +xfsrestore: file system ID: ID >>>>> +xfsrestore: session id: ID >>>>> +xfsrestore: media ID: ID >>>>> +xfsrestore: searching media for directory dump >>>>> +xfsrestore: reading directories >>>>> +xfsrestore: found fake rootino #128, will fix. >>>>> +xfsrestore: fix root # to 1024 (bind mount?) >>>>> +xfsrestore: 2 directories and 2 entries processed >>>>> +xfsrestore: directory post-processing >>>>> +xfsrestore: restoring non-directory files >>>>> +xfsrestore: restore complete: SECS seconds elapsed >>>>> +xfsrestore: Restore Status: SUCCESS >>>>> +Comparing dump directory with restore directory >>>>> +Files DUMP_DIR/FILE_1019 and RESTORE_DIR/DUMP_SUBDIR/FILE_1019 are identical >>>>> +Comparing listing of dump directory with restore directory >>>>> +Files TMP.dump_dir and TMP.restore_dir are identical >>>>> -- >>>>> 2.37.3 >>>>> >>>> >>> >>
