2021-06-04 00:15:43

by Leah Rumancik

[permalink] [raw]
Subject: [PATCH v3] ext4/309: add test for ext4_dir_entry2 wipe

From: Leah Rumancik <[email protected]>

Check wiping of dir entry data upon removing a file, converting to an
htree, and splitting htree nodes.

Tests commit 6c0912739699d8e4b6a87086401bf3ad3c59502d ("ext4: wipe
ext4_dir_entry2 upon file deletion").

Signed-off-by: Leah Rumancik <[email protected]>

Changes in v2:
- fix formatting
- use _get_block_size instead of manually finding blocksize
- change scratch_dir to testdir to avoid confusion

Changes in v3:
- add _require_od_endian_flag function
- skip test 309 if od does not support endian flag
---
common/rc | 9 +++
tests/ext4/309 | 192 +++++++++++++++++++++++++++++++++++++++++++++
tests/ext4/309.out | 5 ++
tests/ext4/group | 1 +
4 files changed, 207 insertions(+)
create mode 100755 tests/ext4/309
create mode 100644 tests/ext4/309.out

diff --git a/common/rc b/common/rc
index 2cf550ec..8b8807d5 100644
--- a/common/rc
+++ b/common/rc
@@ -4513,6 +4513,15 @@ _getcap()
return ${PIPESTATUS[0]}
}

+#od only supports --endian flag in versions 8.23 and later
+_require_od_endian_flag()
+{
+ version="$(od --version | grep -m 1 -o -E '[0-9.]+')"
+ [[ "${version%%.*}" -lt "8" ]] || \
+ [[ "${version%%.*}" -eq "8" && "${version##*.}" -lt "23" ]] && \
+ _notrun "od does not support endian flag"
+}
+
init_rc

################################################################################
diff --git a/tests/ext4/309 b/tests/ext4/309
new file mode 100755
index 00000000..e0497e1a
--- /dev/null
+++ b/tests/ext4/309
@@ -0,0 +1,192 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (c) 2021 Google, Inc. All Rights Reserved.
+#
+# FS QA Test No. 309
+#
+# Test wiping of ext4_dir_entry2 data upon file removal, conversion
+# to htree, and splitting of htree nodes
+#
+seq=`basename $0`
+seqres=$RESULT_DIR/$seq
+echo "QA output created by $seq"
+
+status=1 # failure is the default!
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+
+# remove previous $seqres.full before test
+rm -f $seqres.full
+
+# real QA test starts here
+_supported_fs ext4
+
+_require_scratch
+_require_command "$DEBUGFS_PROG" debugfs
+_require_od_endian_flag
+
+testdir="${SCRATCH_MNT}/testdir"
+
+# get block number filename's dir ent
+# argument 1: filename
+get_block() {
+ echo $($DEBUGFS_PROG $SCRATCH_DEV -R "dirsearch /testdir $1" 2>> $seqres.full | grep -o -m 1 "phys [0-9]\+" | cut -c 6-)
+}
+
+# get offset of filename's dirent within the block
+# argument 1: filename
+get_offset() {
+ echo $($DEBUGFS_PROG $SCRATCH_DEV -R "dirsearch /testdir $1" 2>> $seqres.full | grep -o -m 1 "offset [0-9]\+" | cut -c 8-)
+}
+
+# get record length of dir ent at specified block and offset
+# argument 1: block
+# argument 2: offset
+get_reclen() {
+ echo $(od $SCRATCH_DEV --skip-bytes=$(($1 * $blocksize + $2 + 4)) --read-bytes=2 -d -An --endian=little | tr -d ' \t\n\r')
+}
+
+# reads portion of dirent that should be zero'd out (starting at offset of name_len = 6)
+# and trims 0s and whitespace
+# argument 1: block num containing dir ent
+# argument 2: offset of dir ent within block
+# argument 3: rec len of dir ent
+read_dir_ent() {
+ echo $(od $SCRATCH_DEV --skip-bytes=$(($1 * $blocksize + $2 + 6)) --read-bytes=$(($3 - 6)) -d -An -v | sed -e 's/[0 \t\n\r]//g')
+}
+
+# forces node split on test directory
+# can be used to convert to htree and to split node on existing htree
+# looks for jump in directory size as indicator of node split
+induce_node_split() {
+ _scratch_mount >> $seqres.full 2>&1
+ dir_size="$(stat --printf="%s" $testdir)"
+ while [[ "$(stat --printf="%s" $testdir)" == "$dir_size" ]]; do
+ file_num=$(($file_num + 1))
+ touch $testdir/test"$(printf "%04d" $file_num)"
+ done
+ _scratch_unmount >> $seqres.full 2>&1
+}
+
+#
+# TEST 1: dir entry fields wiped upon file removal
+#
+
+test_file1="test0001"
+test_file2="test0002"
+test_file3="test0003"
+
+_scratch_mkfs_sized $((128 * 1024 * 1024)) >> $seqres.full 2>&1
+
+# create scratch dir for testing
+# create some files with no name a substr of another name so we can grep later
+_scratch_mount >> $seqres.full 2>&1
+blocksize="$(_get_block_size $SCRATCH_MNT)"
+mkdir $testdir
+file_num=1
+for file_num in {1..10}; do
+ touch $testdir/test"$(printf "%04d" $file_num)"
+done
+_scratch_unmount >> $seqres.full 2>&1
+
+# get block, offset, and rec_len of two test files
+block1=$(get_block $test_file1)
+offset1=$(get_offset $test_file1)
+rec_len1=$(get_reclen $block1 $offset1)
+
+block2=$(get_block $test_file2)
+offset2=$(get_offset $test_file2)
+rec_len2=$(get_reclen $block2 $offset2)
+
+_scratch_mount >> $seqres.full 2>&1
+rm $testdir/$test_file1
+_scratch_unmount >> $seqres.full 2>&1
+
+# read name_len field to end of dir entry
+check1=$(read_dir_ent $block1 $offset1 $rec_len1)
+check2=$(read_dir_ent $block2 $offset2 $rec_len2)
+
+# if check is empty, bytes read was all 0's, file data wiped
+# at this point, check1 should be empty, but check 2 should not be
+if [ -z "$check1" ] && [ ! -z "$check2" ]; then
+ echo "Test 1 part 1 passed."
+else
+ _fail "ERROR (test 1 part 1): metadata not wiped upon removing test file 1"
+fi
+
+_scratch_mount >> $seqres.full 2>&1
+rm $testdir/$test_file2
+_scratch_unmount >> $seqres.full 2>&1
+
+check2=$(read_dir_ent $block2 $offset2 $rec_len2)
+
+# at this point, both should be wiped
+[ -z "$check2" ] && echo "Test 1 part 2 passed." || _fail "ERROR (test 1 part 2): metadata not wiped upon removing test file 2"
+
+#
+# TEST 2: old dir entry fields wiped when directory converted to htree
+#
+
+# get original location
+block1=$(get_block $test_file3)
+offset1=$(get_offset $test_file3)
+rec_len1=$(get_reclen $block1 $offset1)
+
+# sanity check, ensures not an htree yet
+check_htree=$($DEBUGFS_PROG $SCRATCH_DEV -R "htree_dump /testdir" 2>&1)
+if [[ "$check_htree" != *"htree_dump: Not a hash-indexed directory"* ]]; then
+ _fail "ERROR (test 2): already an htree"
+fi
+
+# force conversion to htree
+induce_node_split
+
+# ensure it is now an htree
+check_htree=$($DEBUGFS_PROG $SCRATCH_DEV -R "htree_dump /testdir" 2>&1)
+if [[ "$check_htree" == *"htree_dump: Not a hash-indexed directory"* ]]; then
+ _fail "ERROR (test 2): directory was not converted to an htree after creation of many files"
+fi
+
+# check that old data was wiped
+# (this location is not immediately reused by ext4)
+check1=$(read_dir_ent $block1 $offset1 $rec_len1)
+
+# at this point, check1 should be empty meaning data was wiped
+[ -z "$check1" ] && echo "Test 2 passed." || _fail "ERROR (test 2): file metadata not wiped during conversion to htree"
+
+#
+# TEST 3: old dir entries wiped when moved to another block during split_node
+#
+
+# force splitting of a node
+induce_node_split
+# use debugfs to get names of two files from block 3
+hdump=$($DEBUGFS_PROG $SCRATCH_DEV -R "htree_dump /testdir" 2>> $seqres.full)
+
+# get line number of "Reading directory block 3"
+block3_line=$(echo "$hdump" | awk '/Reading directory block 3/{ print NR; exit }')
+
+[ -z "$block3_line" ] && echo "ERROR (test 3): could not find block number 3 after node split"
+
+test_file1=$(echo "$hdump" | sed -n "$(($block3_line + 1))"p | cut -d ' ' -f4)
+test_file2=$(echo "$hdump" | sed -n "$(($block3_line + 2))"p | cut -d ' ' -f4)
+
+# check these filenames don't exist in block 1 or 2
+# get block numbers of first two blocks
+block1=$(echo "$hdump" | grep -o -m 1 "Reading directory block 1, phys [0-9]\+" | cut -c 33-)
+block2=$(echo "$hdump" | grep -o -m 1 "Reading directory block 2, phys [0-9]\+" | cut -c 33-)
+
+# search all of both these blocks for these file names
+check1=$(od $SCRATCH_DEV --skip-bytes=$(($block1 * $blocksize)) --read-bytes=$blocksize -c -An -v | tr -d '\\ \t\n\r\v' | grep -e $test_file1 -e $test_file2)
+check2=$(od $SCRATCH_DEV --skip-bytes=$(($block2 * $blocksize)) --read-bytes=$blocksize -c -An -v | tr -d '\\ \t\n\r\v' | grep -e $test_file1 -e $test_file2)
+
+if [ -z "$check1" ] && [ -z "$check2" ]; then
+ echo "Test 3 passed."
+else
+ _fail "ERROR (test 3): file name not wiped during node split"
+fi
+
+status=0
+exit
diff --git a/tests/ext4/309.out b/tests/ext4/309.out
new file mode 100644
index 00000000..e5febaac
--- /dev/null
+++ b/tests/ext4/309.out
@@ -0,0 +1,5 @@
+QA output created by 309
+Test 1 part 1 passed.
+Test 1 part 2 passed.
+Test 2 passed.
+Test 3 passed.
diff --git a/tests/ext4/group b/tests/ext4/group
index ceda2ba6..e7ad3c24 100644
--- a/tests/ext4/group
+++ b/tests/ext4/group
@@ -59,3 +59,4 @@
306 auto rw resize quick
307 auto ioctl rw defrag
308 auto ioctl rw prealloc quick defrag
+309 auto quick dir
--
2.32.0.rc1.229.g3e70b5a671-goog


2021-06-04 00:45:32

by Darrick J. Wong

[permalink] [raw]
Subject: Re: [PATCH v3] ext4/309: add test for ext4_dir_entry2 wipe

On Fri, Jun 04, 2021 at 12:13:41AM +0000, Leah Rumancik wrote:
> From: Leah Rumancik <[email protected]>
>
> Check wiping of dir entry data upon removing a file, converting to an
> htree, and splitting htree nodes.
>
> Tests commit 6c0912739699d8e4b6a87086401bf3ad3c59502d ("ext4: wipe
> ext4_dir_entry2 upon file deletion").
>
> Signed-off-by: Leah Rumancik <[email protected]>
>
> Changes in v2:
> - fix formatting
> - use _get_block_size instead of manually finding blocksize
> - change scratch_dir to testdir to avoid confusion
>
> Changes in v3:
> - add _require_od_endian_flag function
> - skip test 309 if od does not support endian flag
> ---
> common/rc | 9 +++
> tests/ext4/309 | 192 +++++++++++++++++++++++++++++++++++++++++++++
> tests/ext4/309.out | 5 ++
> tests/ext4/group | 1 +
> 4 files changed, 207 insertions(+)
> create mode 100755 tests/ext4/309
> create mode 100644 tests/ext4/309.out
>
> diff --git a/common/rc b/common/rc
> index 2cf550ec..8b8807d5 100644
> --- a/common/rc
> +++ b/common/rc
> @@ -4513,6 +4513,15 @@ _getcap()
> return ${PIPESTATUS[0]}
> }
>
> +#od only supports --endian flag in versions 8.23 and later
> +_require_od_endian_flag()
> +{
> + version="$(od --version | grep -m 1 -o -E '[0-9.]+')"
> + [[ "${version%%.*}" -lt "8" ]] || \
> + [[ "${version%%.*}" -eq "8" && "${version##*.}" -lt "23" ]] && \
> + _notrun "od does not support endian flag"

Please don't do version checks to determine functionality -- linux
distributors are free to patch in whatever new functionality they please
without bumping version numbers <cough>RHELkernel<cough>.

od --endian=little < /dev/null > /dev/null 2>&1 || \
_notrun "od does not support endian argument"

(At a glance the rest of the logic in the test looks good enough to
handle regular directories, though I'm no longer well-versed in the
weird directory variants <cough>luster<cough>.)

--D

> +}
> +
> init_rc
>
> ################################################################################
> diff --git a/tests/ext4/309 b/tests/ext4/309
> new file mode 100755
> index 00000000..e0497e1a
> --- /dev/null
> +++ b/tests/ext4/309
> @@ -0,0 +1,192 @@
> +#!/bin/bash
> +# SPDX-License-Identifier: GPL-2.0
> +# Copyright (c) 2021 Google, Inc. All Rights Reserved.
> +#
> +# FS QA Test No. 309
> +#
> +# Test wiping of ext4_dir_entry2 data upon file removal, conversion
> +# to htree, and splitting of htree nodes
> +#
> +seq=`basename $0`
> +seqres=$RESULT_DIR/$seq
> +echo "QA output created by $seq"
> +
> +status=1 # failure is the default!
> +
> +# get standard environment, filters and checks
> +. ./common/rc
> +. ./common/filter
> +
> +# remove previous $seqres.full before test
> +rm -f $seqres.full
> +
> +# real QA test starts here
> +_supported_fs ext4
> +
> +_require_scratch
> +_require_command "$DEBUGFS_PROG" debugfs
> +_require_od_endian_flag
> +
> +testdir="${SCRATCH_MNT}/testdir"
> +
> +# get block number filename's dir ent
> +# argument 1: filename
> +get_block() {
> + echo $($DEBUGFS_PROG $SCRATCH_DEV -R "dirsearch /testdir $1" 2>> $seqres.full | grep -o -m 1 "phys [0-9]\+" | cut -c 6-)
> +}
> +
> +# get offset of filename's dirent within the block
> +# argument 1: filename
> +get_offset() {
> + echo $($DEBUGFS_PROG $SCRATCH_DEV -R "dirsearch /testdir $1" 2>> $seqres.full | grep -o -m 1 "offset [0-9]\+" | cut -c 8-)
> +}
> +
> +# get record length of dir ent at specified block and offset
> +# argument 1: block
> +# argument 2: offset
> +get_reclen() {
> + echo $(od $SCRATCH_DEV --skip-bytes=$(($1 * $blocksize + $2 + 4)) --read-bytes=2 -d -An --endian=little | tr -d ' \t\n\r')
> +}
> +
> +# reads portion of dirent that should be zero'd out (starting at offset of name_len = 6)
> +# and trims 0s and whitespace
> +# argument 1: block num containing dir ent
> +# argument 2: offset of dir ent within block
> +# argument 3: rec len of dir ent
> +read_dir_ent() {
> + echo $(od $SCRATCH_DEV --skip-bytes=$(($1 * $blocksize + $2 + 6)) --read-bytes=$(($3 - 6)) -d -An -v | sed -e 's/[0 \t\n\r]//g')
> +}
> +
> +# forces node split on test directory
> +# can be used to convert to htree and to split node on existing htree
> +# looks for jump in directory size as indicator of node split
> +induce_node_split() {
> + _scratch_mount >> $seqres.full 2>&1
> + dir_size="$(stat --printf="%s" $testdir)"
> + while [[ "$(stat --printf="%s" $testdir)" == "$dir_size" ]]; do
> + file_num=$(($file_num + 1))
> + touch $testdir/test"$(printf "%04d" $file_num)"
> + done
> + _scratch_unmount >> $seqres.full 2>&1
> +}
> +
> +#
> +# TEST 1: dir entry fields wiped upon file removal
> +#
> +
> +test_file1="test0001"
> +test_file2="test0002"
> +test_file3="test0003"
> +
> +_scratch_mkfs_sized $((128 * 1024 * 1024)) >> $seqres.full 2>&1
> +
> +# create scratch dir for testing
> +# create some files with no name a substr of another name so we can grep later
> +_scratch_mount >> $seqres.full 2>&1
> +blocksize="$(_get_block_size $SCRATCH_MNT)"
> +mkdir $testdir
> +file_num=1
> +for file_num in {1..10}; do
> + touch $testdir/test"$(printf "%04d" $file_num)"
> +done
> +_scratch_unmount >> $seqres.full 2>&1
> +
> +# get block, offset, and rec_len of two test files
> +block1=$(get_block $test_file1)
> +offset1=$(get_offset $test_file1)
> +rec_len1=$(get_reclen $block1 $offset1)
> +
> +block2=$(get_block $test_file2)
> +offset2=$(get_offset $test_file2)
> +rec_len2=$(get_reclen $block2 $offset2)
> +
> +_scratch_mount >> $seqres.full 2>&1
> +rm $testdir/$test_file1
> +_scratch_unmount >> $seqres.full 2>&1
> +
> +# read name_len field to end of dir entry
> +check1=$(read_dir_ent $block1 $offset1 $rec_len1)
> +check2=$(read_dir_ent $block2 $offset2 $rec_len2)
> +
> +# if check is empty, bytes read was all 0's, file data wiped
> +# at this point, check1 should be empty, but check 2 should not be
> +if [ -z "$check1" ] && [ ! -z "$check2" ]; then
> + echo "Test 1 part 1 passed."
> +else
> + _fail "ERROR (test 1 part 1): metadata not wiped upon removing test file 1"
> +fi
> +
> +_scratch_mount >> $seqres.full 2>&1
> +rm $testdir/$test_file2
> +_scratch_unmount >> $seqres.full 2>&1
> +
> +check2=$(read_dir_ent $block2 $offset2 $rec_len2)
> +
> +# at this point, both should be wiped
> +[ -z "$check2" ] && echo "Test 1 part 2 passed." || _fail "ERROR (test 1 part 2): metadata not wiped upon removing test file 2"
> +
> +#
> +# TEST 2: old dir entry fields wiped when directory converted to htree
> +#
> +
> +# get original location
> +block1=$(get_block $test_file3)
> +offset1=$(get_offset $test_file3)
> +rec_len1=$(get_reclen $block1 $offset1)
> +
> +# sanity check, ensures not an htree yet
> +check_htree=$($DEBUGFS_PROG $SCRATCH_DEV -R "htree_dump /testdir" 2>&1)
> +if [[ "$check_htree" != *"htree_dump: Not a hash-indexed directory"* ]]; then
> + _fail "ERROR (test 2): already an htree"
> +fi
> +
> +# force conversion to htree
> +induce_node_split
> +
> +# ensure it is now an htree
> +check_htree=$($DEBUGFS_PROG $SCRATCH_DEV -R "htree_dump /testdir" 2>&1)
> +if [[ "$check_htree" == *"htree_dump: Not a hash-indexed directory"* ]]; then
> + _fail "ERROR (test 2): directory was not converted to an htree after creation of many files"
> +fi
> +
> +# check that old data was wiped
> +# (this location is not immediately reused by ext4)
> +check1=$(read_dir_ent $block1 $offset1 $rec_len1)
> +
> +# at this point, check1 should be empty meaning data was wiped
> +[ -z "$check1" ] && echo "Test 2 passed." || _fail "ERROR (test 2): file metadata not wiped during conversion to htree"
> +
> +#
> +# TEST 3: old dir entries wiped when moved to another block during split_node
> +#
> +
> +# force splitting of a node
> +induce_node_split
> +# use debugfs to get names of two files from block 3
> +hdump=$($DEBUGFS_PROG $SCRATCH_DEV -R "htree_dump /testdir" 2>> $seqres.full)
> +
> +# get line number of "Reading directory block 3"
> +block3_line=$(echo "$hdump" | awk '/Reading directory block 3/{ print NR; exit }')
> +
> +[ -z "$block3_line" ] && echo "ERROR (test 3): could not find block number 3 after node split"
> +
> +test_file1=$(echo "$hdump" | sed -n "$(($block3_line + 1))"p | cut -d ' ' -f4)
> +test_file2=$(echo "$hdump" | sed -n "$(($block3_line + 2))"p | cut -d ' ' -f4)
> +
> +# check these filenames don't exist in block 1 or 2
> +# get block numbers of first two blocks
> +block1=$(echo "$hdump" | grep -o -m 1 "Reading directory block 1, phys [0-9]\+" | cut -c 33-)
> +block2=$(echo "$hdump" | grep -o -m 1 "Reading directory block 2, phys [0-9]\+" | cut -c 33-)
> +
> +# search all of both these blocks for these file names
> +check1=$(od $SCRATCH_DEV --skip-bytes=$(($block1 * $blocksize)) --read-bytes=$blocksize -c -An -v | tr -d '\\ \t\n\r\v' | grep -e $test_file1 -e $test_file2)
> +check2=$(od $SCRATCH_DEV --skip-bytes=$(($block2 * $blocksize)) --read-bytes=$blocksize -c -An -v | tr -d '\\ \t\n\r\v' | grep -e $test_file1 -e $test_file2)
> +
> +if [ -z "$check1" ] && [ -z "$check2" ]; then
> + echo "Test 3 passed."
> +else
> + _fail "ERROR (test 3): file name not wiped during node split"
> +fi
> +
> +status=0
> +exit
> diff --git a/tests/ext4/309.out b/tests/ext4/309.out
> new file mode 100644
> index 00000000..e5febaac
> --- /dev/null
> +++ b/tests/ext4/309.out
> @@ -0,0 +1,5 @@
> +QA output created by 309
> +Test 1 part 1 passed.
> +Test 1 part 2 passed.
> +Test 2 passed.
> +Test 3 passed.
> diff --git a/tests/ext4/group b/tests/ext4/group
> index ceda2ba6..e7ad3c24 100644
> --- a/tests/ext4/group
> +++ b/tests/ext4/group
> @@ -59,3 +59,4 @@
> 306 auto rw resize quick
> 307 auto ioctl rw defrag
> 308 auto ioctl rw prealloc quick defrag
> +309 auto quick dir
> --
> 2.32.0.rc1.229.g3e70b5a671-goog
>

2021-06-04 01:18:37

by [email protected]

[permalink] [raw]
Subject: Re: [PATCH v3] ext4/309: add test for ext4_dir_entry2 wipe

on 2021/6/4 8:13, Leah Rumancik wrote:
> From: Leah Rumancik<[email protected]>
>
> Check wiping of dir entry data upon removing a file, converting to an
> htree, and splitting htree nodes.
>
> Tests commit 6c0912739699d8e4b6a87086401bf3ad3c59502d ("ext4: wipe
> ext4_dir_entry2 upon file deletion").
>
> Signed-off-by: Leah Rumancik<[email protected]>
>
> Changes in v2:
> - fix formatting
> - use _get_block_size instead of manually finding blocksize
> - change scratch_dir to testdir to avoid confusion
>
> Changes in v3:
> - add _require_od_endian_flag function
> - skip test 309 if od does not support endian flag
If machine is little-endian, we don't need this flag.
If machine is big-endian, we just convert the date into little-endian
format.
I remember we have function to detect whether it is big/litte in
common/encrpty _num_to_hex() function.

local big_endian=$(echo -ne '\x11' | od -tx2 | head -1 | \
cut -f2 -d' ' | cut -c1)

If I am wrong, please correct me.

> ---
> common/rc | 9 +++
> tests/ext4/309 | 192 +++++++++++++++++++++++++++++++++++++++++++++
> tests/ext4/309.out | 5 ++
> tests/ext4/group | 1 +
> 4 files changed, 207 insertions(+)
> create mode 100755 tests/ext4/309
> create mode 100644 tests/ext4/309.out
This case has been merged since xfstests commit 466ddbfd ("ext4: add
test for ext4_dir_entry2 wipe"). So you need to rebase.
>
> diff --git a/common/rc b/common/rc
> index 2cf550ec..8b8807d5 100644
> --- a/common/rc
> +++ b/common/rc
> @@ -4513,6 +4513,15 @@ _getcap()
> return ${PIPESTATUS[0]}
> }
>
> +#od only supports --endian flag in versions 8.23 and later
> +_require_od_endian_flag()
> +{
> + version="$(od --version | grep -m 1 -o -E '[0-9.]+')"
> + [[ "${version%%.*}" -lt "8" ]] || \
> + [[ "${version%%.*}" -eq "8"&& "${version##*.}" -lt "23" ]]&& \
> + _notrun "od does not support endian flag"
> +}
> +
> init_rc
>
> ################################################################################
> diff --git a/tests/ext4/309 b/tests/ext4/309
> new file mode 100755
> index 00000000..e0497e1a
> --- /dev/null
> +++ b/tests/ext4/309
> @@ -0,0 +1,192 @@
> +#!/bin/bash
> +# SPDX-License-Identifier: GPL-2.0
> +# Copyright (c) 2021 Google, Inc. All Rights Reserved.
> +#
> +# FS QA Test No. 309
> +#
> +# Test wiping of ext4_dir_entry2 data upon file removal, conversion
> +# to htree, and splitting of htree nodes
> +#
> +seq=`basename $0`
> +seqres=$RESULT_DIR/$seq
> +echo "QA output created by $seq"
> +
> +status=1 # failure is the default!
> +
> +# get standard environment, filters and checks
> +. ./common/rc
> +. ./common/filter
> +
> +# remove previous $seqres.full before test
> +rm -f $seqres.full
> +
> +# real QA test starts here
> +_supported_fs ext4
> +
> +_require_scratch
> +_require_command "$DEBUGFS_PROG" debugfs
> +_require_od_endian_flag
> +
> +testdir="${SCRATCH_MNT}/testdir"
> +
> +# get block number filename's dir ent
> +# argument 1: filename
> +get_block() {
> + echo $($DEBUGFS_PROG $SCRATCH_DEV -R "dirsearch /testdir $1" 2>> $seqres.full | grep -o -m 1 "phys [0-9]\+" | cut -c 6-)
> +}
> +
> +# get offset of filename's dirent within the block
> +# argument 1: filename
> +get_offset() {
> + echo $($DEBUGFS_PROG $SCRATCH_DEV -R "dirsearch /testdir $1" 2>> $seqres.full | grep -o -m 1 "offset [0-9]\+" | cut -c 8-)
> +}
> +
> +# get record length of dir ent at specified block and offset
> +# argument 1: block
> +# argument 2: offset
> +get_reclen() {
> + echo $(od $SCRATCH_DEV --skip-bytes=$(($1 * $blocksize + $2 + 4)) --read-bytes=2 -d -An --endian=little | tr -d ' \t\n\r')
> +}
> +
> +# reads portion of dirent that should be zero'd out (starting at offset of name_len = 6)
> +# and trims 0s and whitespace
> +# argument 1: block num containing dir ent
> +# argument 2: offset of dir ent within block
> +# argument 3: rec len of dir ent
> +read_dir_ent() {
> + echo $(od $SCRATCH_DEV --skip-bytes=$(($1 * $blocksize + $2 + 6)) --read-bytes=$(($3 - 6)) -d -An -v | sed -e 's/[0 \t\n\r]//g')
> +}
> +
> +# forces node split on test directory
> +# can be used to convert to htree and to split node on existing htree
> +# looks for jump in directory size as indicator of node split
> +induce_node_split() {
> + _scratch_mount>> $seqres.full 2>&1
> + dir_size="$(stat --printf="%s" $testdir)"
> + while [[ "$(stat --printf="%s" $testdir)" == "$dir_size" ]]; do
> + file_num=$(($file_num + 1))
> + touch $testdir/test"$(printf "%04d" $file_num)"
> + done
> + _scratch_unmount>> $seqres.full 2>&1
> +}
> +
> +#
> +# TEST 1: dir entry fields wiped upon file removal
> +#
> +
> +test_file1="test0001"
> +test_file2="test0002"
> +test_file3="test0003"
> +
> +_scratch_mkfs_sized $((128 * 1024 * 1024))>> $seqres.full 2>&1
> +
> +# create scratch dir for testing
> +# create some files with no name a substr of another name so we can grep later
> +_scratch_mount>> $seqres.full 2>&1
> +blocksize="$(_get_block_size $SCRATCH_MNT)"
> +mkdir $testdir
> +file_num=1
> +for file_num in {1..10}; do
> + touch $testdir/test"$(printf "%04d" $file_num)"
> +done
> +_scratch_unmount>> $seqres.full 2>&1
> +
> +# get block, offset, and rec_len of two test files
> +block1=$(get_block $test_file1)
> +offset1=$(get_offset $test_file1)
> +rec_len1=$(get_reclen $block1 $offset1)
> +
> +block2=$(get_block $test_file2)
> +offset2=$(get_offset $test_file2)
> +rec_len2=$(get_reclen $block2 $offset2)
> +
> +_scratch_mount>> $seqres.full 2>&1
> +rm $testdir/$test_file1
> +_scratch_unmount>> $seqres.full 2>&1
> +
> +# read name_len field to end of dir entry
> +check1=$(read_dir_ent $block1 $offset1 $rec_len1)
> +check2=$(read_dir_ent $block2 $offset2 $rec_len2)
> +
> +# if check is empty, bytes read was all 0's, file data wiped
> +# at this point, check1 should be empty, but check 2 should not be
> +if [ -z "$check1" ]&& [ ! -z "$check2" ]; then
> + echo "Test 1 part 1 passed."
> +else
> + _fail "ERROR (test 1 part 1): metadata not wiped upon removing test file 1"
> +fi
> +
> +_scratch_mount>> $seqres.full 2>&1
> +rm $testdir/$test_file2
> +_scratch_unmount>> $seqres.full 2>&1
> +
> +check2=$(read_dir_ent $block2 $offset2 $rec_len2)
> +
> +# at this point, both should be wiped
> +[ -z "$check2" ]&& echo "Test 1 part 2 passed." || _fail "ERROR (test 1 part 2): metadata not wiped upon removing test file 2"
> +
> +#
> +# TEST 2: old dir entry fields wiped when directory converted to htree
> +#
> +
> +# get original location
> +block1=$(get_block $test_file3)
> +offset1=$(get_offset $test_file3)
> +rec_len1=$(get_reclen $block1 $offset1)
> +
> +# sanity check, ensures not an htree yet
> +check_htree=$($DEBUGFS_PROG $SCRATCH_DEV -R "htree_dump /testdir" 2>&1)
> +if [[ "$check_htree" != *"htree_dump: Not a hash-indexed directory"* ]]; then
> + _fail "ERROR (test 2): already an htree"
> +fi
> +
> +# force conversion to htree
> +induce_node_split
> +
> +# ensure it is now an htree
> +check_htree=$($DEBUGFS_PROG $SCRATCH_DEV -R "htree_dump /testdir" 2>&1)
> +if [[ "$check_htree" == *"htree_dump: Not a hash-indexed directory"* ]]; then
> + _fail "ERROR (test 2): directory was not converted to an htree after creation of many files"
> +fi
> +
> +# check that old data was wiped
> +# (this location is not immediately reused by ext4)
> +check1=$(read_dir_ent $block1 $offset1 $rec_len1)
> +
> +# at this point, check1 should be empty meaning data was wiped
> +[ -z "$check1" ]&& echo "Test 2 passed." || _fail "ERROR (test 2): file metadata not wiped during conversion to htree"
> +
> +#
> +# TEST 3: old dir entries wiped when moved to another block during split_node
> +#
> +
> +# force splitting of a node
> +induce_node_split
> +# use debugfs to get names of two files from block 3
> +hdump=$($DEBUGFS_PROG $SCRATCH_DEV -R "htree_dump /testdir" 2>> $seqres.full)
> +
> +# get line number of "Reading directory block 3"
> +block3_line=$(echo "$hdump" | awk '/Reading directory block 3/{ print NR; exit }')
> +
> +[ -z "$block3_line" ]&& echo "ERROR (test 3): could not find block number 3 after node split"
> +
> +test_file1=$(echo "$hdump" | sed -n "$(($block3_line + 1))"p | cut -d ' ' -f4)
> +test_file2=$(echo "$hdump" | sed -n "$(($block3_line + 2))"p | cut -d ' ' -f4)
> +
> +# check these filenames don't exist in block 1 or 2
> +# get block numbers of first two blocks
> +block1=$(echo "$hdump" | grep -o -m 1 "Reading directory block 1, phys [0-9]\+" | cut -c 33-)
> +block2=$(echo "$hdump" | grep -o -m 1 "Reading directory block 2, phys [0-9]\+" | cut -c 33-)
> +
> +# search all of both these blocks for these file names
> +check1=$(od $SCRATCH_DEV --skip-bytes=$(($block1 * $blocksize)) --read-bytes=$blocksize -c -An -v | tr -d '\\ \t\n\r\v' | grep -e $test_file1 -e $test_file2)
> +check2=$(od $SCRATCH_DEV --skip-bytes=$(($block2 * $blocksize)) --read-bytes=$blocksize -c -An -v | tr -d '\\ \t\n\r\v' | grep -e $test_file1 -e $test_file2)
> +
> +if [ -z "$check1" ]&& [ -z "$check2" ]; then
> + echo "Test 3 passed."
> +else
> + _fail "ERROR (test 3): file name not wiped during node split"
> +fi
> +
> +status=0
> +exit
> diff --git a/tests/ext4/309.out b/tests/ext4/309.out
> new file mode 100644
> index 00000000..e5febaac
> --- /dev/null
> +++ b/tests/ext4/309.out
> @@ -0,0 +1,5 @@
> +QA output created by 309
> +Test 1 part 1 passed.
> +Test 1 part 2 passed.
> +Test 2 passed.
> +Test 3 passed.
> diff --git a/tests/ext4/group b/tests/ext4/group
> index ceda2ba6..e7ad3c24 100644
> --- a/tests/ext4/group
> +++ b/tests/ext4/group
> @@ -59,3 +59,4 @@
> 306 auto rw resize quick
> 307 auto ioctl rw defrag
> 308 auto ioctl rw prealloc quick defrag
> +309 auto quick dir

2021-06-04 17:55:26

by Leah Rumancik

[permalink] [raw]
Subject: Re: [PATCH v3] ext4/309: add test for ext4_dir_entry2 wipe

On Thu, Jun 03, 2021 at 05:44:37PM -0700, Darrick J. Wong wrote:
> On Fri, Jun 04, 2021 at 12:13:41AM +0000, Leah Rumancik wrote:
> > From: Leah Rumancik <[email protected]>
> >
> > Check wiping of dir entry data upon removing a file, converting to an
> > htree, and splitting htree nodes.
> >
> > Tests commit 6c0912739699d8e4b6a87086401bf3ad3c59502d ("ext4: wipe
> > ext4_dir_entry2 upon file deletion").
> >
> > Signed-off-by: Leah Rumancik <[email protected]>
> >
> > Changes in v2:
> > - fix formatting
> > - use _get_block_size instead of manually finding blocksize
> > - change scratch_dir to testdir to avoid confusion
> >
> > Changes in v3:
> > - add _require_od_endian_flag function
> > - skip test 309 if od does not support endian flag
> > ---
> > common/rc | 9 +++
> > tests/ext4/309 | 192 +++++++++++++++++++++++++++++++++++++++++++++
> > tests/ext4/309.out | 5 ++
> > tests/ext4/group | 1 +
> > 4 files changed, 207 insertions(+)
> > create mode 100755 tests/ext4/309
> > create mode 100644 tests/ext4/309.out
> >
> > diff --git a/common/rc b/common/rc
> > index 2cf550ec..8b8807d5 100644
> > --- a/common/rc
> > +++ b/common/rc
> > @@ -4513,6 +4513,15 @@ _getcap()
> > return ${PIPESTATUS[0]}
> > }
> >
> > +#od only supports --endian flag in versions 8.23 and later
> > +_require_od_endian_flag()
> > +{
> > + version="$(od --version | grep -m 1 -o -E '[0-9.]+')"
> > + [[ "${version%%.*}" -lt "8" ]] || \
> > + [[ "${version%%.*}" -eq "8" && "${version##*.}" -lt "23" ]] && \
> > + _notrun "od does not support endian flag"
>
> Please don't do version checks to determine functionality -- linux
> distributors are free to patch in whatever new functionality they please
> without bumping version numbers <cough>RHELkernel<cough>.
>
> od --endian=little < /dev/null > /dev/null 2>&1 || \
> _notrun "od does not support endian argument"

Ah that makes sense, thanks.

>
> (At a glance the rest of the logic in the test looks good enough to
> handle regular directories, though I'm no longer well-versed in the
> weird directory variants <cough>luster<cough>.)
>
> --D
>
> > +}
> > +
> > init_rc
> >
> > ################################################################################
> > diff --git a/tests/ext4/309 b/tests/ext4/309
> > new file mode 100755
> > index 00000000..e0497e1a
> > --- /dev/null
> > +++ b/tests/ext4/309
> > @@ -0,0 +1,192 @@
> > +#!/bin/bash
> > +# SPDX-License-Identifier: GPL-2.0
> > +# Copyright (c) 2021 Google, Inc. All Rights Reserved.
> > +#
> > +# FS QA Test No. 309
> > +#
> > +# Test wiping of ext4_dir_entry2 data upon file removal, conversion
> > +# to htree, and splitting of htree nodes
> > +#
> > +seq=`basename $0`
> > +seqres=$RESULT_DIR/$seq
> > +echo "QA output created by $seq"
> > +
> > +status=1 # failure is the default!
> > +
> > +# get standard environment, filters and checks
> > +. ./common/rc
> > +. ./common/filter
> > +
> > +# remove previous $seqres.full before test
> > +rm -f $seqres.full
> > +
> > +# real QA test starts here
> > +_supported_fs ext4
> > +
> > +_require_scratch
> > +_require_command "$DEBUGFS_PROG" debugfs
> > +_require_od_endian_flag
> > +
> > +testdir="${SCRATCH_MNT}/testdir"
> > +
> > +# get block number filename's dir ent
> > +# argument 1: filename
> > +get_block() {
> > + echo $($DEBUGFS_PROG $SCRATCH_DEV -R "dirsearch /testdir $1" 2>> $seqres.full | grep -o -m 1 "phys [0-9]\+" | cut -c 6-)
> > +}
> > +
> > +# get offset of filename's dirent within the block
> > +# argument 1: filename
> > +get_offset() {
> > + echo $($DEBUGFS_PROG $SCRATCH_DEV -R "dirsearch /testdir $1" 2>> $seqres.full | grep -o -m 1 "offset [0-9]\+" | cut -c 8-)
> > +}
> > +
> > +# get record length of dir ent at specified block and offset
> > +# argument 1: block
> > +# argument 2: offset
> > +get_reclen() {
> > + echo $(od $SCRATCH_DEV --skip-bytes=$(($1 * $blocksize + $2 + 4)) --read-bytes=2 -d -An --endian=little | tr -d ' \t\n\r')
> > +}
> > +
> > +# reads portion of dirent that should be zero'd out (starting at offset of name_len = 6)
> > +# and trims 0s and whitespace
> > +# argument 1: block num containing dir ent
> > +# argument 2: offset of dir ent within block
> > +# argument 3: rec len of dir ent
> > +read_dir_ent() {
> > + echo $(od $SCRATCH_DEV --skip-bytes=$(($1 * $blocksize + $2 + 6)) --read-bytes=$(($3 - 6)) -d -An -v | sed -e 's/[0 \t\n\r]//g')
> > +}
> > +
> > +# forces node split on test directory
> > +# can be used to convert to htree and to split node on existing htree
> > +# looks for jump in directory size as indicator of node split
> > +induce_node_split() {
> > + _scratch_mount >> $seqres.full 2>&1
> > + dir_size="$(stat --printf="%s" $testdir)"
> > + while [[ "$(stat --printf="%s" $testdir)" == "$dir_size" ]]; do
> > + file_num=$(($file_num + 1))
> > + touch $testdir/test"$(printf "%04d" $file_num)"
> > + done
> > + _scratch_unmount >> $seqres.full 2>&1
> > +}
> > +
> > +#
> > +# TEST 1: dir entry fields wiped upon file removal
> > +#
> > +
> > +test_file1="test0001"
> > +test_file2="test0002"
> > +test_file3="test0003"
> > +
> > +_scratch_mkfs_sized $((128 * 1024 * 1024)) >> $seqres.full 2>&1
> > +
> > +# create scratch dir for testing
> > +# create some files with no name a substr of another name so we can grep later
> > +_scratch_mount >> $seqres.full 2>&1
> > +blocksize="$(_get_block_size $SCRATCH_MNT)"
> > +mkdir $testdir
> > +file_num=1
> > +for file_num in {1..10}; do
> > + touch $testdir/test"$(printf "%04d" $file_num)"
> > +done
> > +_scratch_unmount >> $seqres.full 2>&1
> > +
> > +# get block, offset, and rec_len of two test files
> > +block1=$(get_block $test_file1)
> > +offset1=$(get_offset $test_file1)
> > +rec_len1=$(get_reclen $block1 $offset1)
> > +
> > +block2=$(get_block $test_file2)
> > +offset2=$(get_offset $test_file2)
> > +rec_len2=$(get_reclen $block2 $offset2)
> > +
> > +_scratch_mount >> $seqres.full 2>&1
> > +rm $testdir/$test_file1
> > +_scratch_unmount >> $seqres.full 2>&1
> > +
> > +# read name_len field to end of dir entry
> > +check1=$(read_dir_ent $block1 $offset1 $rec_len1)
> > +check2=$(read_dir_ent $block2 $offset2 $rec_len2)
> > +
> > +# if check is empty, bytes read was all 0's, file data wiped
> > +# at this point, check1 should be empty, but check 2 should not be
> > +if [ -z "$check1" ] && [ ! -z "$check2" ]; then
> > + echo "Test 1 part 1 passed."
> > +else
> > + _fail "ERROR (test 1 part 1): metadata not wiped upon removing test file 1"
> > +fi
> > +
> > +_scratch_mount >> $seqres.full 2>&1
> > +rm $testdir/$test_file2
> > +_scratch_unmount >> $seqres.full 2>&1
> > +
> > +check2=$(read_dir_ent $block2 $offset2 $rec_len2)
> > +
> > +# at this point, both should be wiped
> > +[ -z "$check2" ] && echo "Test 1 part 2 passed." || _fail "ERROR (test 1 part 2): metadata not wiped upon removing test file 2"
> > +
> > +#
> > +# TEST 2: old dir entry fields wiped when directory converted to htree
> > +#
> > +
> > +# get original location
> > +block1=$(get_block $test_file3)
> > +offset1=$(get_offset $test_file3)
> > +rec_len1=$(get_reclen $block1 $offset1)
> > +
> > +# sanity check, ensures not an htree yet
> > +check_htree=$($DEBUGFS_PROG $SCRATCH_DEV -R "htree_dump /testdir" 2>&1)
> > +if [[ "$check_htree" != *"htree_dump: Not a hash-indexed directory"* ]]; then
> > + _fail "ERROR (test 2): already an htree"
> > +fi
> > +
> > +# force conversion to htree
> > +induce_node_split
> > +
> > +# ensure it is now an htree
> > +check_htree=$($DEBUGFS_PROG $SCRATCH_DEV -R "htree_dump /testdir" 2>&1)
> > +if [[ "$check_htree" == *"htree_dump: Not a hash-indexed directory"* ]]; then
> > + _fail "ERROR (test 2): directory was not converted to an htree after creation of many files"
> > +fi
> > +
> > +# check that old data was wiped
> > +# (this location is not immediately reused by ext4)
> > +check1=$(read_dir_ent $block1 $offset1 $rec_len1)
> > +
> > +# at this point, check1 should be empty meaning data was wiped
> > +[ -z "$check1" ] && echo "Test 2 passed." || _fail "ERROR (test 2): file metadata not wiped during conversion to htree"
> > +
> > +#
> > +# TEST 3: old dir entries wiped when moved to another block during split_node
> > +#
> > +
> > +# force splitting of a node
> > +induce_node_split
> > +# use debugfs to get names of two files from block 3
> > +hdump=$($DEBUGFS_PROG $SCRATCH_DEV -R "htree_dump /testdir" 2>> $seqres.full)
> > +
> > +# get line number of "Reading directory block 3"
> > +block3_line=$(echo "$hdump" | awk '/Reading directory block 3/{ print NR; exit }')
> > +
> > +[ -z "$block3_line" ] && echo "ERROR (test 3): could not find block number 3 after node split"
> > +
> > +test_file1=$(echo "$hdump" | sed -n "$(($block3_line + 1))"p | cut -d ' ' -f4)
> > +test_file2=$(echo "$hdump" | sed -n "$(($block3_line + 2))"p | cut -d ' ' -f4)
> > +
> > +# check these filenames don't exist in block 1 or 2
> > +# get block numbers of first two blocks
> > +block1=$(echo "$hdump" | grep -o -m 1 "Reading directory block 1, phys [0-9]\+" | cut -c 33-)
> > +block2=$(echo "$hdump" | grep -o -m 1 "Reading directory block 2, phys [0-9]\+" | cut -c 33-)
> > +
> > +# search all of both these blocks for these file names
> > +check1=$(od $SCRATCH_DEV --skip-bytes=$(($block1 * $blocksize)) --read-bytes=$blocksize -c -An -v | tr -d '\\ \t\n\r\v' | grep -e $test_file1 -e $test_file2)
> > +check2=$(od $SCRATCH_DEV --skip-bytes=$(($block2 * $blocksize)) --read-bytes=$blocksize -c -An -v | tr -d '\\ \t\n\r\v' | grep -e $test_file1 -e $test_file2)
> > +
> > +if [ -z "$check1" ] && [ -z "$check2" ]; then
> > + echo "Test 3 passed."
> > +else
> > + _fail "ERROR (test 3): file name not wiped during node split"
> > +fi
> > +
> > +status=0
> > +exit
> > diff --git a/tests/ext4/309.out b/tests/ext4/309.out
> > new file mode 100644
> > index 00000000..e5febaac
> > --- /dev/null
> > +++ b/tests/ext4/309.out
> > @@ -0,0 +1,5 @@
> > +QA output created by 309
> > +Test 1 part 1 passed.
> > +Test 1 part 2 passed.
> > +Test 2 passed.
> > +Test 3 passed.
> > diff --git a/tests/ext4/group b/tests/ext4/group
> > index ceda2ba6..e7ad3c24 100644
> > --- a/tests/ext4/group
> > +++ b/tests/ext4/group
> > @@ -59,3 +59,4 @@
> > 306 auto rw resize quick
> > 307 auto ioctl rw defrag
> > 308 auto ioctl rw prealloc quick defrag
> > +309 auto quick dir
> > --
> > 2.32.0.rc1.229.g3e70b5a671-goog
> >

2021-06-04 23:51:47

by Leah Rumancik

[permalink] [raw]
Subject: Re: [PATCH v3] ext4/309: add test for ext4_dir_entry2 wipe

On Fri, Jun 04, 2021 at 01:10:41AM +0000, [email protected] wrote:
> on 2021/6/4 8:13, Leah Rumancik wrote:
> > From: Leah Rumancik<[email protected]>
> >
> > Check wiping of dir entry data upon removing a file, converting to an
> > htree, and splitting htree nodes.
> >
> > Tests commit 6c0912739699d8e4b6a87086401bf3ad3c59502d ("ext4: wipe
> > ext4_dir_entry2 upon file deletion").
> >
> > Signed-off-by: Leah Rumancik<[email protected]>
> >
> > Changes in v2:
> > - fix formatting
> > - use _get_block_size instead of manually finding blocksize
> > - change scratch_dir to testdir to avoid confusion
> >
> > Changes in v3:
> > - add _require_od_endian_flag function
> > - skip test 309 if od does not support endian flag
> If machine is little-endian, we don't need this flag.
> If machine is big-endian, we just convert the date into little-endian
> format.
> I remember we have function to detect whether it is big/litte in
> common/encrpty _num_to_hex() function.
>
> local big_endian=$(echo -ne '\x11' | od -tx2 | head -1 | \
> cut -f2 -d' ' | cut -c1)
>
> If I am wrong, please correct me.

Yes sure, I'll update this.

>
> > ---
> > common/rc | 9 +++
> > tests/ext4/309 | 192 +++++++++++++++++++++++++++++++++++++++++++++
> > tests/ext4/309.out | 5 ++
> > tests/ext4/group | 1 +
> > 4 files changed, 207 insertions(+)
> > create mode 100755 tests/ext4/309
> > create mode 100644 tests/ext4/309.out
> This case has been merged since xfstests commit 466ddbfd ("ext4: add
> test for ext4_dir_entry2 wipe"). So you need to rebase.

Could you give me a link to where you are seeing this merged already?

Thanks,
Leah

> >
> > diff --git a/common/rc b/common/rc
> > index 2cf550ec..8b8807d5 100644
> > --- a/common/rc
> > +++ b/common/rc
> > @@ -4513,6 +4513,15 @@ _getcap()
> > return ${PIPESTATUS[0]}
> > }
> >
> > +#od only supports --endian flag in versions 8.23 and later
> > +_require_od_endian_flag()
> > +{
> > + version="$(od --version | grep -m 1 -o -E '[0-9.]+')"
> > + [[ "${version%%.*}" -lt "8" ]] || \
> > + [[ "${version%%.*}" -eq "8"&& "${version##*.}" -lt "23" ]]&& \
> > + _notrun "od does not support endian flag"
> > +}
> > +
> > init_rc
> >
> > ################################################################################
> > diff --git a/tests/ext4/309 b/tests/ext4/309
> > new file mode 100755
> > index 00000000..e0497e1a
> > --- /dev/null
> > +++ b/tests/ext4/309
> > @@ -0,0 +1,192 @@
> > +#!/bin/bash
> > +# SPDX-License-Identifier: GPL-2.0
> > +# Copyright (c) 2021 Google, Inc. All Rights Reserved.
> > +#
> > +# FS QA Test No. 309
> > +#
> > +# Test wiping of ext4_dir_entry2 data upon file removal, conversion
> > +# to htree, and splitting of htree nodes
> > +#
> > +seq=`basename $0`
> > +seqres=$RESULT_DIR/$seq
> > +echo "QA output created by $seq"
> > +
> > +status=1 # failure is the default!
> > +
> > +# get standard environment, filters and checks
> > +. ./common/rc
> > +. ./common/filter
> > +
> > +# remove previous $seqres.full before test
> > +rm -f $seqres.full
> > +
> > +# real QA test starts here
> > +_supported_fs ext4
> > +
> > +_require_scratch
> > +_require_command "$DEBUGFS_PROG" debugfs
> > +_require_od_endian_flag
> > +
> > +testdir="${SCRATCH_MNT}/testdir"
> > +
> > +# get block number filename's dir ent
> > +# argument 1: filename
> > +get_block() {
> > + echo $($DEBUGFS_PROG $SCRATCH_DEV -R "dirsearch /testdir $1" 2>> $seqres.full | grep -o -m 1 "phys [0-9]\+" | cut -c 6-)
> > +}
> > +
> > +# get offset of filename's dirent within the block
> > +# argument 1: filename
> > +get_offset() {
> > + echo $($DEBUGFS_PROG $SCRATCH_DEV -R "dirsearch /testdir $1" 2>> $seqres.full | grep -o -m 1 "offset [0-9]\+" | cut -c 8-)
> > +}
> > +
> > +# get record length of dir ent at specified block and offset
> > +# argument 1: block
> > +# argument 2: offset
> > +get_reclen() {
> > + echo $(od $SCRATCH_DEV --skip-bytes=$(($1 * $blocksize + $2 + 4)) --read-bytes=2 -d -An --endian=little | tr -d ' \t\n\r')
> > +}
> > +
> > +# reads portion of dirent that should be zero'd out (starting at offset of name_len = 6)
> > +# and trims 0s and whitespace
> > +# argument 1: block num containing dir ent
> > +# argument 2: offset of dir ent within block
> > +# argument 3: rec len of dir ent
> > +read_dir_ent() {
> > + echo $(od $SCRATCH_DEV --skip-bytes=$(($1 * $blocksize + $2 + 6)) --read-bytes=$(($3 - 6)) -d -An -v | sed -e 's/[0 \t\n\r]//g')
> > +}
> > +
> > +# forces node split on test directory
> > +# can be used to convert to htree and to split node on existing htree
> > +# looks for jump in directory size as indicator of node split
> > +induce_node_split() {
> > + _scratch_mount>> $seqres.full 2>&1
> > + dir_size="$(stat --printf="%s" $testdir)"
> > + while [[ "$(stat --printf="%s" $testdir)" == "$dir_size" ]]; do
> > + file_num=$(($file_num + 1))
> > + touch $testdir/test"$(printf "%04d" $file_num)"
> > + done
> > + _scratch_unmount>> $seqres.full 2>&1
> > +}
> > +
> > +#
> > +# TEST 1: dir entry fields wiped upon file removal
> > +#
> > +
> > +test_file1="test0001"
> > +test_file2="test0002"
> > +test_file3="test0003"
> > +
> > +_scratch_mkfs_sized $((128 * 1024 * 1024))>> $seqres.full 2>&1
> > +
> > +# create scratch dir for testing
> > +# create some files with no name a substr of another name so we can grep later
> > +_scratch_mount>> $seqres.full 2>&1
> > +blocksize="$(_get_block_size $SCRATCH_MNT)"
> > +mkdir $testdir
> > +file_num=1
> > +for file_num in {1..10}; do
> > + touch $testdir/test"$(printf "%04d" $file_num)"
> > +done
> > +_scratch_unmount>> $seqres.full 2>&1
> > +
> > +# get block, offset, and rec_len of two test files
> > +block1=$(get_block $test_file1)
> > +offset1=$(get_offset $test_file1)
> > +rec_len1=$(get_reclen $block1 $offset1)
> > +
> > +block2=$(get_block $test_file2)
> > +offset2=$(get_offset $test_file2)
> > +rec_len2=$(get_reclen $block2 $offset2)
> > +
> > +_scratch_mount>> $seqres.full 2>&1
> > +rm $testdir/$test_file1
> > +_scratch_unmount>> $seqres.full 2>&1
> > +
> > +# read name_len field to end of dir entry
> > +check1=$(read_dir_ent $block1 $offset1 $rec_len1)
> > +check2=$(read_dir_ent $block2 $offset2 $rec_len2)
> > +
> > +# if check is empty, bytes read was all 0's, file data wiped
> > +# at this point, check1 should be empty, but check 2 should not be
> > +if [ -z "$check1" ]&& [ ! -z "$check2" ]; then
> > + echo "Test 1 part 1 passed."
> > +else
> > + _fail "ERROR (test 1 part 1): metadata not wiped upon removing test file 1"
> > +fi
> > +
> > +_scratch_mount>> $seqres.full 2>&1
> > +rm $testdir/$test_file2
> > +_scratch_unmount>> $seqres.full 2>&1
> > +
> > +check2=$(read_dir_ent $block2 $offset2 $rec_len2)
> > +
> > +# at this point, both should be wiped
> > +[ -z "$check2" ]&& echo "Test 1 part 2 passed." || _fail "ERROR (test 1 part 2): metadata not wiped upon removing test file 2"
> > +
> > +#
> > +# TEST 2: old dir entry fields wiped when directory converted to htree
> > +#
> > +
> > +# get original location
> > +block1=$(get_block $test_file3)
> > +offset1=$(get_offset $test_file3)
> > +rec_len1=$(get_reclen $block1 $offset1)
> > +
> > +# sanity check, ensures not an htree yet
> > +check_htree=$($DEBUGFS_PROG $SCRATCH_DEV -R "htree_dump /testdir" 2>&1)
> > +if [[ "$check_htree" != *"htree_dump: Not a hash-indexed directory"* ]]; then
> > + _fail "ERROR (test 2): already an htree"
> > +fi
> > +
> > +# force conversion to htree
> > +induce_node_split
> > +
> > +# ensure it is now an htree
> > +check_htree=$($DEBUGFS_PROG $SCRATCH_DEV -R "htree_dump /testdir" 2>&1)
> > +if [[ "$check_htree" == *"htree_dump: Not a hash-indexed directory"* ]]; then
> > + _fail "ERROR (test 2): directory was not converted to an htree after creation of many files"
> > +fi
> > +
> > +# check that old data was wiped
> > +# (this location is not immediately reused by ext4)
> > +check1=$(read_dir_ent $block1 $offset1 $rec_len1)
> > +
> > +# at this point, check1 should be empty meaning data was wiped
> > +[ -z "$check1" ]&& echo "Test 2 passed." || _fail "ERROR (test 2): file metadata not wiped during conversion to htree"
> > +
> > +#
> > +# TEST 3: old dir entries wiped when moved to another block during split_node
> > +#
> > +
> > +# force splitting of a node
> > +induce_node_split
> > +# use debugfs to get names of two files from block 3
> > +hdump=$($DEBUGFS_PROG $SCRATCH_DEV -R "htree_dump /testdir" 2>> $seqres.full)
> > +
> > +# get line number of "Reading directory block 3"
> > +block3_line=$(echo "$hdump" | awk '/Reading directory block 3/{ print NR; exit }')
> > +
> > +[ -z "$block3_line" ]&& echo "ERROR (test 3): could not find block number 3 after node split"
> > +
> > +test_file1=$(echo "$hdump" | sed -n "$(($block3_line + 1))"p | cut -d ' ' -f4)
> > +test_file2=$(echo "$hdump" | sed -n "$(($block3_line + 2))"p | cut -d ' ' -f4)
> > +
> > +# check these filenames don't exist in block 1 or 2
> > +# get block numbers of first two blocks
> > +block1=$(echo "$hdump" | grep -o -m 1 "Reading directory block 1, phys [0-9]\+" | cut -c 33-)
> > +block2=$(echo "$hdump" | grep -o -m 1 "Reading directory block 2, phys [0-9]\+" | cut -c 33-)
> > +
> > +# search all of both these blocks for these file names
> > +check1=$(od $SCRATCH_DEV --skip-bytes=$(($block1 * $blocksize)) --read-bytes=$blocksize -c -An -v | tr -d '\\ \t\n\r\v' | grep -e $test_file1 -e $test_file2)
> > +check2=$(od $SCRATCH_DEV --skip-bytes=$(($block2 * $blocksize)) --read-bytes=$blocksize -c -An -v | tr -d '\\ \t\n\r\v' | grep -e $test_file1 -e $test_file2)
> > +
> > +if [ -z "$check1" ]&& [ -z "$check2" ]; then
> > + echo "Test 3 passed."
> > +else
> > + _fail "ERROR (test 3): file name not wiped during node split"
> > +fi
> > +
> > +status=0
> > +exit
> > diff --git a/tests/ext4/309.out b/tests/ext4/309.out
> > new file mode 100644
> > index 00000000..e5febaac
> > --- /dev/null
> > +++ b/tests/ext4/309.out
> > @@ -0,0 +1,5 @@
> > +QA output created by 309
> > +Test 1 part 1 passed.
> > +Test 1 part 2 passed.
> > +Test 2 passed.
> > +Test 3 passed.
> > diff --git a/tests/ext4/group b/tests/ext4/group
> > index ceda2ba6..e7ad3c24 100644
> > --- a/tests/ext4/group
> > +++ b/tests/ext4/group
> > @@ -59,3 +59,4 @@
> > 306 auto rw resize quick
> > 307 auto ioctl rw defrag
> > 308 auto ioctl rw prealloc quick defrag
> > +309 auto quick dir