On Wed, Feb 01, 2017 at 09:50:28PM +0800, Anand Jain wrote: > /dev/urandom is incompressible and, /dev/zero is highly compressible, > so both are less effective in testing the compress code logic in btrfs. > > This patch introduces a text data generator > cat /dev/urandom | od
I noticed that the similar patterns appear many times: cat /dev/urandom | od | dd <dd params> | _filter_dd I'm wondering if this could be done in a new helper? Thanks, Eryu > to populate the files where /dev/urandom is currently being used in the > btrfs test cases. > > And updates the _populate_fs() with a new option -c, so to instruct > to use the compressible data to populate the file(s). > > Signed-off-by: Anand Jain <[email protected]> > --- > common/rc | 9 ++++++--- > tests/btrfs/002 | 6 +++--- > tests/btrfs/003 | 4 ++-- > tests/btrfs/008 | 4 ++-- > tests/btrfs/011 | 11 ++++------- > tests/btrfs/016 | 2 +- > tests/btrfs/022 | 6 ++++-- > tests/btrfs/027 | 6 +++--- > 8 files changed, 25 insertions(+), 23 deletions(-) > > diff --git a/common/rc b/common/rc > index 862bc048de46..022dc202aaf5 100644 > --- a/common/rc > +++ b/common/rc > @@ -2424,7 +2424,9 @@ _nfiles() > if [ $size -gt 0 ]; then > if [ "$2" == "false" ]; then > dd if=/dev/zero of=$file bs=1024 count=$size 2>&1 | > _filter_dd > - else > + elif [ "$2" == "comp" ]; then > + cat /dev/urandom | od | dd iflag=fullblock of=$file > bs=1024 count=$size 2>&1 | _filter_dd > + else > dd if=/dev/urandom of=$file bs=1024 count=$size 2>&1 > | _filter_dd > fi > fi > @@ -2468,10 +2470,10 @@ _populate_fs() > depth=2 # depth of tree from root to leaves > verbose=false > root=root # path of initial root of directory tree > - randomdata=false # -x data type urandom or zero > + randomdata=false # -x data type urandom, zero or compressible > > OPTIND=1 > - while getopts "d:f:n:r:s:v:x" c > + while getopts "d:f:n:r:s:v:x:c" c > do > case $c in > d) depth=$OPTARG;; > @@ -2481,6 +2483,7 @@ _populate_fs() > v) verbose=true;; > r) root=$OPTARG;; > x) randomdata=true;; > + c) randomdata=comp;; > esac > done > > diff --git a/tests/btrfs/002 b/tests/btrfs/002 > index fce5d955dfa3..6a44c832e1b5 100755 > --- a/tests/btrfs/002 > +++ b/tests/btrfs/002 > @@ -92,7 +92,7 @@ _read_modify_write() > do > FSIZE=`stat -t $i | cut -d" " -f2` > dd if=$i of=/dev/null obs=$FSIZE count=1 status=noxfer > 2>/dev/null & > - dd if=/dev/urandom of=$i obs=$FSIZE count=1 status=noxfer > 2>/dev/null & > + cat /dev/urandom | od | dd iflag=fullblock of=$i obs=$FSIZE > count=1 status=noxfer 2>/dev/null & > done > wait $! > } > @@ -114,7 +114,7 @@ _fill_blk() > NBLK=`stat -c "%b" $i` > FALLOC=$(($BLKS * $NBLK)) > WS=$(($FALLOC - $FSIZE)) > - dd if=/dev/urandom of=$i oseek=$FSIZE obs=$WS count=1 > status=noxfer 2>/dev/null & > + cat /dev/urandom | od | dd of=$i oseek=$FSIZE obs=$WS count=1 > status=noxfer 2>/dev/null & > done > wait $! > } > @@ -149,7 +149,7 @@ _append_file() > firstvol="$SCRATCH_MNT/sv1" > $BTRFS_UTIL_PROG subvolume create $firstvol > /dev/null || _fail "btrfs > subvolume create $firstvol failed" > dirp=`mktemp -duq $firstvol/dir.XXXXXX` > -_populate_fs -n 1 -f 20 -d 10 -r $dirp -s 10 -x > +_populate_fs -n 1 -f 20 -d 10 -r $dirp -s 10 -c > SNAPNAME=0 > _create_snap $firstvol > _save_checksum $firstvol $tmp.sv1.sum > diff --git a/tests/btrfs/003 b/tests/btrfs/003 > index 51cff4644186..3ec3a2d9f998 100755 > --- a/tests/btrfs/003 > +++ b/tests/btrfs/003 > @@ -62,7 +62,7 @@ _test_raid0() > _scratch_pool_mkfs >> $seqres.full 2>&1 || _fail "mkfs failed" > _scratch_mount > dirp=`mktemp -duq $SCRATCH_MNT/dir.XXXXXX` > - _populate_fs -n 1 -f 20 -d 10 -r $dirp -s 10 > + _populate_fs -n 1 -f 20 -d 10 -r $dirp -s 10 -c > _scratch_unmount > } > > @@ -72,7 +72,7 @@ _test_raid1() > _scratch_pool_mkfs >> $seqres.full 2>&1 || _fail "mkfs failed" > _scratch_mount > dirp=`mktemp -duq $SCRATCH_MNT/dir.XXXXXX` > - _populate_fs -n 1 -f 20 -d 10 -r $dirp -s 10 > + _populate_fs -n 1 -f 20 -d 10 -r $dirp -s 10 -c > _scratch_unmount > } > > diff --git a/tests/btrfs/008 b/tests/btrfs/008 > index 019af0415d18..2c9fe11890cf 100755 > --- a/tests/btrfs/008 > +++ b/tests/btrfs/008 > @@ -69,8 +69,8 @@ work_dir="$TEST_DIR/$tmp_dir/send" > mkdir $work_dir/testdir > mkdir $work_dir/testdir/1/ > mkdir $work_dir/testdir/2/ > -dd if=/dev/urandom of=$work_dir/testdir/aa count=16 > /dev/null 2>&1 > -dd if=/dev/urandom of=$work_dir/testdir/bb count=16 > /dev/null 2>&1 > +cat /dev/urandom | od | dd iflag=fullblock of=$work_dir/testdir/aa count=16 > > /dev/null 2>&1 > +cat /dev/urandom | od | dd iflag=fullblock of=$work_dir/testdir/bb count=16 > > /dev/null 2>&1 > > mkdir $work_dir/snapshots > $BTRFS_UTIL_PROG subvolume snapshot -r $work_dir $work_dir/snapshots/backup2 > \ > diff --git a/tests/btrfs/011 b/tests/btrfs/011 > index 918742717528..202fb41485e2 100755 > --- a/tests/btrfs/011 > +++ b/tests/btrfs/011 > @@ -123,15 +123,12 @@ workout() > # 20K extents in the data chunk and fill up metadata with inline > # extents. > for i in `seq 1 500`; do > - dd if=/dev/urandom of=$SCRATCH_MNT/l$i bs=16385 count=1 > - dd if=/dev/urandom of=$SCRATCH_MNT/s$i bs=3800 count=1 > + cat /dev/urandom | od | dd iflag=fullblock of=$SCRATCH_MNT/l$i > bs=16385 count=1 > + cat /dev/urandom | od | dd iflag=fullblock of=$SCRATCH_MNT/s$i > bs=3800 count=1 > done > /dev/null 2>&1 > > - # /dev/urandom is slow but has the benefit that the generated > - # contents does not shrink during compression. > # Generate a template once and quickly copy it multiple times. > - # Obviously with online deduplication this will not work anymore. > - dd if=/dev/urandom of=$SCRATCH_MNT/t0 bs=1M count=1 > /dev/null 2>&1 > + cat /dev/urandom | od | dd iflag=fullblock of=$SCRATCH_MNT/t0 bs=1M > count=1 > /dev/null 2>&1 > > if [ "${quick}Q" = "thoroughQ" ]; then > # The intention of this "thorough" test is to increase > @@ -220,7 +217,7 @@ btrfs_replace_test() > # generate some (slow) background traffic in parallel to the > # replace operation. It is not a problem if cat fails early > # with ENOSPC. > - cat /dev/urandom > $SCRATCH_MNT/noise 2>> $seqres.full & > + cat /dev/urandom | od > $SCRATCH_MNT/noise 2>> $seqres.full & > noise_pid=$! > > if [ "${with_cancel}Q" = "cancelQ" ]; then > diff --git a/tests/btrfs/016 b/tests/btrfs/016 > index c8fc70892394..03f030410358 100755 > --- a/tests/btrfs/016 > +++ b/tests/btrfs/016 > @@ -66,7 +66,7 @@ mkdir $TEST_DIR/$tmp_dir > $BTRFS_UTIL_PROG subvolume create $TEST_DIR/$tmp_dir/send \ > > $seqres.full 2>&1 || _fail "failed subvolume create" > > -dd if=/dev/urandom of=$TEST_DIR/$tmp_dir/send/foo bs=1M count=10 >> > $seqres.full \ > +cat /dev/urandom | od | dd iflag=fullblock of=$TEST_DIR/$tmp_dir/send/foo > bs=1M count=10 >> $seqres.full \ > 2>&1 || _fail "dd failed" > $BTRFS_UTIL_PROG subvolume snapshot -r $TEST_DIR/$tmp_dir/send \ > $TEST_DIR/$tmp_dir/snap >> $seqres.full 2>&1 || _fail "failed snap" > diff --git a/tests/btrfs/022 b/tests/btrfs/022 > index 9abad6c99099..713e42146853 100755 > --- a/tests/btrfs/022 > +++ b/tests/btrfs/022 > @@ -103,7 +103,8 @@ _limit_test_exceed() > _run_btrfs_util_prog quota enable $SCRATCH_MNT > subvolid=$(_btrfs_get_subvolid $SCRATCH_MNT a) > _run_btrfs_util_prog qgroup limit 5M 0/$subvolid $SCRATCH_MNT > - dd if=/dev/urandom of=$SCRATCH_MNT/a/file bs=10M count=1 >> \ > + cat /dev/urandom | od | \ > + dd iflag=fullblock of=$SCRATCH_MNT/a/file bs=10M count=1 >> \ > $seqres.full 2>&1 > [ $? -ne 0 ] || _fail "quota should have limited us" > } > @@ -115,7 +116,8 @@ _limit_test_noexceed() > _run_btrfs_util_prog quota enable $SCRATCH_MNT > subvolid=$(_btrfs_get_subvolid $SCRATCH_MNT a) > _run_btrfs_util_prog qgroup limit 5M 0/$subvolid $SCRATCH_MNT > - dd if=/dev/urandom of=$SCRATCH_MNT/a/file bs=4M count=1 >> \ > + cat /dev/urandom | od | \ > + dd iflag=fullblock of=$SCRATCH_MNT/a/file bs=4M count=1 >> \ > $seqres.full 2>&1 > [ $? -eq 0 ] || _fail "should have been allowed to write" > } > diff --git a/tests/btrfs/027 b/tests/btrfs/027 > index 8cc2e8cb8264..a3d152db8b9b 100755 > --- a/tests/btrfs/027 > +++ b/tests/btrfs/027 > @@ -81,11 +81,11 @@ run_test() > local missing_dev_id=`$BTRFS_UTIL_PROG fi show $SCRATCH_MNT | grep > $missing_dev | awk '{print $2}'` > > # get some data on the filesystem so there's something to replace > - dd if=/dev/urandom of="$SCRATCH_MNT"/file1 bs=1M count=1 \ > + cat /dev/urandom | od | dd iflag=fullblock of="$SCRATCH_MNT"/file1 > bs=1M count=1 \ > >>$seqres.full 2>&1 > - dd if=/dev/urandom of="$SCRATCH_MNT"/file2 bs=1M count=2 \ > + cat /dev/urandom | od | dd iflag=fullblock of="$SCRATCH_MNT"/file2 > bs=1M count=2 \ > >>$seqres.full 2>&1 > - dd if=/dev/urandom of="$SCRATCH_MNT"/file3 bs=1M count=4 \ > + cat /dev/urandom | od | dd iflag=fullblock of="$SCRATCH_MNT"/file3 > bs=1M count=4 \ > >>$seqres.full 2>&1 > > # nuke a device and remount in degraded mode > -- > 2.10.0 > > -- > To unsubscribe from this list: send the line "unsubscribe fstests" in > the body of a message to [email protected] > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
