On Wed, 7 Sep 2011, Lukas Czerner wrote:
> This test suppose to validate that file systems are using the fitrim
> arguments right. It checks that the fstrim returns EINVAl in case that
> the start of the range is beyond the end of the file system, and also
> that the fstrim works without an error if the length of the range is
> bigger than the file system (it should be truncated to the file system
> length automatically within the fitrim implementation).
>
> This test should also catch common problem with overflow of start+len.
> Some file systems (ext4,xfs) had overflow problems in the past so there
> is a specific test for it (for ext4 and xfs) as well as generic test for
> other file systems, but it would be nice if other fs can add their
> specific checks if this problem does apply to them as well.
Any comments on this test ?
Thanks!
-Lukas
>
> Signed-off-by: Lukas Czerner <lczerner@xxxxxxxxxx>
> ---
> v2: add check for fsblock to agno overflow
>
> 257 | 183 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> 257.out | 14 +++++
> group | 1 +
> 3 files changed, 198 insertions(+), 0 deletions(-)
> create mode 100755 257
> create mode 100644 257.out
>
> diff --git a/257 b/257
> new file mode 100755
> index 0000000..53efa92
> --- /dev/null
> +++ b/257
> @@ -0,0 +1,183 @@
> +#!/bin/bash
> +# FS QA Test No. 251
> +#
> +# This test was created in order to verify filesystem FITRIM implementation.
> +# By many concurrent copy and remove operations and checking that files
> +# does not change after copied into SCRATCH_MNT test if FITRIM implementation
> +# corrupts the filesystem (data/metadata).
> +#
> +#-----------------------------------------------------------------------
> +# Copyright 2010 (C) Red Hat, Inc., Lukas Czerner <lczerner@xxxxxxxxxx>
> +#
> +# 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
> +#-----------------------------------------------------------------------
> +
> +owner=lczerner@xxxxxxxxxx
> +
> +seq=`basename $0`
> +echo "QA output created by $seq"
> +
> +here=`pwd`
> +tmp=`mktemp -d`
> +status=0
> +trap "exit \$status" 0 1 3
> +trap "exit \$status" 2 15
> +chpid=0
> +mypid=$$
> +
> +_check_conversion_overflow()
> +{
> + backup_mkfs_options=MKFS_OPTIONS
> +
> + # (2^32-1) + 2 (this is set to overflow 32bit variable by 2)
> + base=$((4294967295+2))
> +
> + case $FSTYP in
> + ext[34])
> + agsize=32768
> + bsize=4096
> + start=$(($base*$agsize*$bsize))
> + len=$(($base*$agsize*$bsize))
> + export MKFS_OPTIONS="-F -b $bsize -g $agsize"
> + ;;
> + xfs)
> + agsize=65536
> + bsize=4096
> + start=$(($base*$agsize*$bsize))
> + len=$(($base*$agsize*$bsize))
> + export MKFS_OPTIONS="-f -d agsize=$(($agsize*$bsize)) -b size=$bsize"
> + ;;
> + *)
> + # (2^32-1) * 4096 * 65536 == 32bit max size * block size * ag size
> + start="1152921504875282432"
> + len="1152921504875282432"
> + ;;
> + esac
> +
> + _scratch_unmount
> + _scratch_mkfs >/dev/null 2>&1
> + _scratch_mount
> + $here/src/fstrim -s$start -l$(($fsize/2)) $SCRATCH_MNT &> /dev/null
> + [ $? -eq 0 ] && status=1 && echo "It seems that fs logic handling start"\
> + "argument overflows"
> +
> + _scratch_unmount
> + _scratch_mkfs >/dev/null 2>&1
> + _scratch_mount
> +
> + # len should be big enough to cover the whole file system, however this
> + # test suppose for the overflow, so if the number of discarded bytes is
> + # smaller than fsize/2 than it most likely does overflow.
> + out=$($here/src/fstrim -v -l$len $SCRATCH_MNT)
> + bytes=${out%% *}
> +
> + # Btrfs is special and this test does not apply to it
> + if [ $bytes -le $(($fsize*512)) ] && [ $FSTYP != "btrfs" ]; then
> + status=1
> + echo "It seems that fs logic handling len argument overflows"
> + fi
> + export MKFS_OPTIONS=$backup_mkfs_options
> +}
> +
> +
> +# get standard environment, filters and checks
> +. ./common.rc
> +. ./common.filter
> +
> +# real QA test starts here
> +_supported_fs generic
> +_supported_os Linux
> +_require_scratch
> +_scratch_mkfs >/dev/null 2>&1
> +_scratch_mount
> +
> +
> +$here/src/fstrim -l 10M $SCRATCH_MNT &> /dev/null || _notrun "FSTRIM is not supported"
> +
> +fsize=$(df -k | grep "$SCRATCH_MNT" | grep "$SCRATCH_DEV" | awk '{print $2}')
> +
> +# All these tests should return EINVAL
> +# since the start is beyond the end of
> +# the file system
> +
> +echo "[+] Start beyond the end of fs (should fail)"
> +$here/src/fstrim -s$(($fsize*2048)) $SCRATCH_MNT
> +[ $? -eq 0 ] && status=1
> +
> +echo "[+] Start beyond the end of fs with len set (should fail)"
> +$here/src/fstrim -s$(($fsize*2048)) -l1M $SCRATCH_MNT
> +[ $? -eq 0 ] && status=1
> +
> +echo "[+] Start = 2^64-1 (should fail)"
> +$here/src/fstrim -s18446744073709551615 $SCRATCH_MNT
> +[ $? -eq 0 ] && status=1
> +
> +echo "[+] Start = 2^64-1 and len is set (should fail)"
> +$here/src/fstrim -s18446744073709551615 -l1M $SCRATCH_MNT
> +[ $? -eq 0 ] && status=1
> +
> +_scratch_unmount
> +_scratch_mkfs >/dev/null 2>&1
> +_scratch_mount
> +
> +# All these tests should succeed
> +# since the length should be truncated
> +
> +echo "[+] Default length (should succeed)"
> +$here/src/fstrim $SCRATCH_MNT
> +[ $? -ne 0 ] && status=1
> +echo "[+] Default length with start set (should succeed)"
> +$here/src/fstrim -s10M $SCRATCH_MNT
> +[ $? -ne 0 ] && status=1
> +echo "[+] Length beyond the end of fs (should succeed)"
> +$here/src/fstrim -l$((fsize*2048)) $SCRATCH_MNT
> +[ $? -ne 0 ] && status=1
> +echo "[+] Length beyond the end of fs wich start set (should succeed)"
> +$here/src/fstrim -s10M -l$((fsize*2048)) $SCRATCH_MNT
> +[ $? -ne 0 ] && status=1
> +
> +_scratch_unmount
> +_scratch_mkfs >/dev/null 2>&1
> +_scratch_mount
> +
> +# This is a bit fuzzy, but since the file system is fresh
> +# there should be at least (fsize/2) free space to trim.
> +# This is supposed to catch wrong range.len handling and overflows.
> +out=$($here/src/fstrim -v -s10M $SCRATCH_MNT)
> +bytes=${out%% *}
> +
> +if [ $bytes -gt $(($fsize*1024)) ]; then
> + status=1
> + echo "After the full fs discard $bytes bytes were discarded"\
> + "however the file system is $(($fsize*1024)) bytes long."\
> + "This is suspicious."
> +fi
> +
> +# Btrfs is special and this test does not apply to it
> +if [ $bytes -le $(($fsize*512)) ] && [ $FSTYP != "btrfs" ]; then
> + status=1
> + echo "After the full fs discard $bytes bytes were discarded"\
> + "however the file system is $(($fsize*1024)) bytes long."\
> + "This is suspicious."
> +fi
> +
> +# Now to catch overflows due to fsblk->allocation group number conversion
> +# This is different for every file system and it also apply just to some of
> +# them. In order to add check specific for file system you're interested in
> +# compute the arguments as you need and make the file system with proper
> +# alignment in function _check_conversion_overflow()
> +_check_conversion_overflow
> +
> +echo "Test done"
> +exit
> diff --git a/257.out b/257.out
> new file mode 100644
> index 0000000..86a5246
> --- /dev/null
> +++ b/257.out
> @@ -0,0 +1,14 @@
> +QA output created by 257
> +[+] Start beyond the end of fs (should fail)
> +fstrim: FSTRIM: Invalid argument
> +[+] Start beyond the end of fs with len set (should fail)
> +fstrim: FSTRIM: Invalid argument
> +[+] Start = 2^64-1 (should fail)
> +fstrim: FSTRIM: Invalid argument
> +[+] Start = 2^64-1 and len is set (should fail)
> +fstrim: FSTRIM: Invalid argument
> +[+] Default length (should succeed)
> +[+] Default length with start set (should succeed)
> +[+] Length beyond the end of fs (should succeed)
> +[+] Length beyond the end of fs wich start set (should succeed)
> +Test done
> diff --git a/group b/group
> index 0c746c8..b742f91 100644
> --- a/group
> +++ b/group
> @@ -370,3 +370,4 @@ deprecated
> 254 auto quick
> 255 auto quick prealloc
> 256 auto quick
> +257 auto quick trim
>
--
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