On 2/13/14, 9:23 AM, Koen De Wit wrote:
> Tests the noatime, relatime, strictatime and nodiratime mount options.
>
> There is an extra check for Btrfs to ensure that the access time is
> never updated on read-only subvolumes. (Regression test for bug fixed
> with commit 93fd63c2f001ca6797c6b15b696a484b165b4800)
>
> Signed-off-by: Koen De Wit <koen.de.wit@xxxxxxxxxx>
> ---
> tests/generic/323 | 186 +++++++++++++++++++++++++++++++++++++++++++++++++
> tests/generic/323.out | 2 +
> tests/generic/group | 1 +
> 3 files changed, 189 insertions(+), 0 deletions(-)
> create mode 100644 tests/generic/323
> create mode 100644 tests/generic/323.out
>
> diff --git a/tests/generic/323 b/tests/generic/323
> new file mode 100644
> index 0000000..423b141
> --- /dev/null
> +++ b/tests/generic/323
> @@ -0,0 +1,186 @@
> +# Tests the noatime, relatime, strictatime and nodiratime mount options.
> +# There is an extra check for Btrfs to ensure that the access time is
> +# never updated on read-only subvolumes. (Regression test for bug fixed
> +# with commit 93fd63c2f001ca6797c6b15b696a484b165b4800)
> +#
> +#-----------------------------------------------------------------------
> +# Copyright (c) 2014, Oracle and/or its affiliates. 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 $*
> +}
is "$*" really what you meant? Normally this is $tmp.*
$* is positional parameters for the script, and I don't think it takes any.
> +
> +# get standard environment, filters and checks
> +. ./common/rc
> +. ./common/filter
> +
> +# real QA test starts here
> +
> +_supported_fs generic
> +_supported_os Linux
> +_require_scratch
> +
> +rm -f $seqres.full
> +
> +_stat() {
> + stat --printf="%x;%y;%z" $1
> +}
> +
> +_compare_stat_times() {
> + updated=$1 # 3 chars indicating if access, modify and
> + # change times should be updated (Y) or not (N)
> + IFS=';' read -a first_stat <<< "$2" # Convert first stat to array
> + IFS=';' read -a second_stat <<< "$3" # Convert second stat to array
> + test_step=$4 # Will be printed to output stream in case of an
> + # error, to make debugging easier
> + types=( access modify change )
> +
> + for i in 0 1 2; do
> + if [ "${first_stat[$i]}" == "${second_stat[$i]}" ]; then
> + if [ "${updated:$i:1}" == "Y" ]; then
> + echo -n "ERROR: ${types[$i]} time has not been updated "
> + echo $test_step
> + fi
> + else
> + if [ "${updated:$i:1}" == "N" ]; then
> + echo -n "ERROR: ${types[$i]} time has changed "
> + echo $test_step
> + fi
> + fi
> + done
> +}
> +
> +_scratch_mkfs >> $seqres.full 2>&1 || _fail "mkfs failed"
> +_scratch_mount
> +
> +cat /proc/mounts | grep "$SCRATCH_MNT" | grep relatime >> $seqres.full
> +[ $? -ne 0 ] && echo "The relatime mount option should be the default."
Ok, I guess "relatime" in /proc/mounts is from core vfs code and should be there for the foreseeable future, so seems ok.
But - relatime was added in v2.6.20, and made default in 2.6.30. So testing older kernels may not go as expected; it'd probably be best to catch situations where relatime isn't available (< 2.6.20) or not default (< 2.6.30), by explicitly mounting with relatime, and skipping relatime/strictatime tests if that fails?
The rest of the test is awfully dense, but nice long understandable variable names, so that's good. ;)
I wonder if in the spirit of testing a btrfs RO snapshot, you could also add a readonly mount test, to be sure that an RO mount doesn't update atime. Of course it shouldn't, but it might be worth adding for basic sanity?
Thanks,
-Eric
> +
> +if [ "$FSTYP" = "btrfs" ]; then
> + TPATH=$SCRATCH_MNT/sub1
> + $BTRFS_UTIL_PROG subvolume create $TPATH > $seqres.full
> +else
> + TPATH=$SCRATCH_MNT
> +fi
> +
> +mkdir $TPATH/dir1
> +echo "aaa" > $TPATH/dir1/file1
> +file1_stat_before_first_access=`_stat $TPATH/dir1/file1`
> +
> +# Accessing file1 the first time
> +cat $TPATH/dir1/file1 > /dev/null
> +file1_stat_after_first_access=`_stat $TPATH/dir1/file1`
> +_compare_stat_times YNN "$file1_stat_before_first_access" \
> + "$file1_stat_after_first_access" "after accessing file1 first time"
> +
> +# Accessing file1 a second time
> +cat $TPATH/dir1/file1 > /dev/null
> +file1_stat_after_second_access=`_stat $TPATH/dir1/file1`
> +_compare_stat_times NNN "$file1_stat_after_first_access" \
> + "$file1_stat_after_second_access" "after accessing file1 second time"
> +
> +# Remounting with nodiratime option
> +_scratch_unmount
> +_scratch_mount "-o nodiratime"
> +file1_stat_after_remount=`_stat $TPATH/dir1/file1`
> +_compare_stat_times NNN "$file1_stat_after_second_access" \
> + "$file1_stat_after_remount" "for file1 after remount"
> +
> +# Creating dir2 and file2, checking directory stats
> +mkdir $TPATH/dir2
> +dir2_stat_before_file_creation=`_stat $TPATH/dir2`
> +echo "bbb" > $TPATH/dir2/file2
> +dir2_stat_after_file_creation=`_stat $TPATH/dir2`
> +_compare_stat_times NYY "$dir2_stat_before_file_creation" \
> + "$dir2_stat_after_file_creation" "for dir2 after file creation"
> +
> +# Accessing file2
> +file2_stat_before_first_access=`_stat $TPATH/dir2/file2`
> +cat $TPATH/dir2/file2 > /dev/null
> +file2_stat_after_first_access=`_stat $TPATH/dir2/file2`
> +_compare_stat_times YNN "$file2_stat_before_first_access" \
> + "$file2_stat_after_first_access" "after accessing file2"
> +dir2_stat_after_file_access=`_stat $TPATH/dir2`
> +_compare_stat_times NNN "$dir2_stat_after_file_creation" \
> + "$dir2_stat_after_file_access" "for dir2 after file access"
> +
> +# Remounting with noatime option, creating a file and accessing it
> +_scratch_unmount
> +_scratch_mount "-o noatime"
> +echo "ccc" > $TPATH/dir2/file3
> +file3_stat_before_first_access=`_stat $TPATH/dir2/file3`
> +cat $TPATH/dir2/file3 > /dev/null
> +file3_stat_after_first_access=`_stat $TPATH/dir2/file3`
> +_compare_stat_times NNN "$file3_stat_before_first_access" \
> + "$file3_stat_after_first_access" "after accessing file3 first time"
> +
> +# Checking that the modify and change times are still updated
> +file1_stat_before_modify=`_stat $TPATH/dir1/file1`
> +echo "xyz" > $TPATH/dir1/file1
> +file1_stat_after_modify=`_stat $TPATH/dir1/file1`
> +_compare_stat_times NYY "$file1_stat_before_modify" \
> + "$file1_stat_after_modify" "after modifying file1"
> +mv $TPATH/dir1/file1 $TPATH/dir1/file1_renamed
> +file1_stat_after_change=`_stat $TPATH/dir1/file1_renamed`
> +_compare_stat_times NNY "$file1_stat_after_modify" \
> + "$file1_stat_after_change" "after changing file1"
> +
> +# Remounting with strictatime option and
> +# accessing a previously created file twice
> +_scratch_unmount
> +_scratch_mount "-o strictatime"
> +cat $TPATH/dir2/file3 > /dev/null
> +file3_stat_after_second_access=`_stat $TPATH/dir2/file3`
> +_compare_stat_times YNN "$file3_stat_after_first_access" \
> + "$file3_stat_after_second_access" "after accessing file3 second time"
> +cat $TPATH/dir2/file3 > /dev/null
> +file3_stat_after_third_access=`_stat $TPATH/dir2/file3`
> +_compare_stat_times YNN "$file3_stat_after_second_access" \
> + "$file3_stat_after_third_access" "after accessing file3 third time"
> +
> +# Btrfs only: Creating readonly snapshot. Access time should never
> +# be updated, even when the strictatime mount option is active
> +if [ "$FSTYP" = "btrfs" ]; then
> + SPATH=$SCRATCH_MNT/snap1
> + btrfs subvol snapshot -r $TPATH $SPATH >> $seqres.full
> + dir2_stat_readonly_before_access=`_stat $SPATH/dir2`
> + ls $SPATH/dir2 >> $seqres.full
> + cat $SPATH/dir2/file3 >> $seqres.full
> + dir2_stat_readonly_after_access=`_stat $SPATH/dir2`
> + _compare_stat_times NNN "$dir2_stat_readonly_before_access" \
> + "$dir2_stat_readonly_after_access" "for dir in readonly subvol"
> + file3_stat_readonly_after_access=`_stat $SPATH/dir2/file3`
> + _compare_stat_times NNN "$file3_stat_after_third_access" \
> + "$file3_stat_readonly_after_access" "for file in readonly subvol"
> +fi
> +
> +# success, all done
> +_scratch_unmount
> +echo "Silence is golden"
> +status=0
> +exit
> diff --git a/tests/generic/323.out b/tests/generic/323.out
> new file mode 100644
> index 0000000..5dba9b5
> --- /dev/null
> +++ b/tests/generic/323.out
> @@ -0,0 +1,2 @@
> +QA output created by 323
> +Silence is golden
> diff --git a/tests/generic/group b/tests/generic/group
> index f492461..3a72ee4 100644
> --- a/tests/generic/group
> +++ b/tests/generic/group
> @@ -125,3 +125,4 @@
> 320 auto rw
> 321 auto quick metadata log
> 322 auto quick metadata log
> +323 atime auto quick
>
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