--- /dev/null
+#!/bin/bash
+# FS QA Test No. 260
+#
+# Purpose of this test is to check FITRIM argument handling to make sure
+# that the argument processing is right and that it does not overflow.
+#
+#-----------------------------------------------------------------------
+# Copyright 2011 (C) Red Hat, Inc., Lukas Czerner <lczerner@redhat.com>
+#
+# 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@redhat.com
+
+seq=`basename $0`
+echo "QA output created by $seq"
+
+here=`pwd`
+tmp=`mktemp -d`
+status=0
+trap "exit \$status" 0 1 2 3 15
+chpid=0
+mypid=$$
+
+# get standard environment, filters and checks
+. ./common.rc
+. ./common.filter
+
+# real QA test starts here
+_supported_fs generic
+_supported_os Linux
+_require_math
+
+_require_scratch
+_scratch_mkfs >/dev/null 2>&1
+_scratch_mount
+
+FSTRIM="$here/src/fstrim"
+"$FSTRIM" -l 10M $SCRATCH_MNT &> /dev/null || _notrun "FSTRIM is not supported"
+
+fssize=$(df -k | grep "$SCRATCH_MNT" | grep "$SCRATCH_DEV" | awk '{print $2}')
+
+beyond_eofs=$(_math "$fssize*2048")
+max_64bit=$(_math "2^64 - 1")
+
+# 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)"
+"$FSTRIM" -s $beyond_eofs $SCRATCH_MNT
+[ $? -eq 0 ] && status=1
+
+echo "[+] Start beyond the end of fs with len set (should fail)"
+"$FSTRIM" -s $beyond_eofs -l1M $SCRATCH_MNT
+[ $? -eq 0 ] && status=1
+
+echo "[+] Start = 2^64-1 (should fail)"
+"$FSTRIM" -s $max_64bit $SCRATCH_MNT
+[ $? -eq 0 ] && status=1
+
+echo "[+] Start = 2^64-1 and len is set (should fail)"
+"$FSTRIM" -s $max_64bit -l1M $SCRATCH_MNT
+[ $? -eq 0 ] && status=1
+
+_scratch_unmount
+_scratch_mkfs >/dev/null 2>&1
+_scratch_mount
+
+# All these tests should succeed
+# since the length should be truncated
+
+echo "[+] Default length (should succeed)"
+"$FSTRIM" $SCRATCH_MNT
+[ $? -ne 0 ] && status=1
+echo "[+] Default length with start set (should succeed)"
+"$FSTRIM" -s10M $SCRATCH_MNT
+[ $? -ne 0 ] && status=1
+echo "[+] Length beyond the end of fs (should succeed)"
+"$FSTRIM" -l $beyond_eofs $SCRATCH_MNT
+[ $? -ne 0 ] && status=1
+echo "[+] Length beyond the end of fs with start set (should succeed)"
+"$FSTRIM" -s10M -l $beyond_eofs $SCRATCH_MNT
+[ $? -ne 0 ] && status=1
+
+_scratch_unmount
+_scratch_mkfs >/dev/null 2>&1
+_scratch_mount
+
+# This is a bit fuzzy, but since the file system is fresh
+# there should be at least (fssize/2) free space to trim.
+# This is supposed to catch wrong FITRIM argument handling
+out=$("$FSTRIM" -v -s10M $SCRATCH_MNT)
+bytes=${out%% *}
+
+if [ $bytes -gt $(_math "$fssize*1024") ]; then
+ status=1
+ echo "After the full fs discard $bytes bytes were discarded"\
+ "however the file system is $(_math "$fssize*1024") bytes long."
+fi
+
+# Btrfs is special and this test does not apply to it
+# It is because btrfs does not have not-yet-used parts of the device
+# mapped and since we got here right after the mkfs, there is not
+# enough free extents in the root tree.
+if [ $bytes -le $(_math "$fssize*512") ] && [ $FSTYP != "btrfs" ]; then
+ status=1
+ echo "After the full fs discard $bytes bytes were discarded"\
+ "however the file system is $(_math "$fssize*1024") bytes long."
+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
+
+# (2^32-1) + 2 (this is set to overflow 32bit variable by 2)
+base=$(_math "2^32+1")
+
+case $FSTYP in
+ ext[34])
+ agsize=32768
+ bsize=4096
+ start=$(_math "$base*$agsize*$bsize")
+ len=$start
+ export MKFS_OPTIONS="-F -b $bsize -g $agsize"
+ ;;
+ xfs)
+ agsize=65538
+ bsize=4096
+ start=$(_math "$base*$agsize*$bsize")
+ len=$start
+ export MKFS_OPTIONS="-f -d agsize=$(_math "$agsize*$bsize") -b size=$bsize"
+ ;;
+ *)
+ # (2^32-1) * 4096 * 65536 == 32bit max size * block size * ag size
+ start=$(_math "(2^32 - 1) * 4096 * 65536")
+ len=$start
+ ;;
+esac
+
+_scratch_unmount
+_scratch_mkfs >/dev/null 2>&1
+_scratch_mount
+# It should fail since $start is beyond the end of file system
+"$FSTRIM" -s$start -l10M $SCRATCH_MNT &> /dev/null
+if [ $? -eq 0 ]; then
+ status=1
+ echo "It seems that fs logic handling start"\
+ "argument overflows"
+fi
+
+_scratch_unmount
+_scratch_mkfs >/dev/null 2>&1
+_scratch_mount
+
+# len should be big enough to cover the whole file system, so if the
+# number of discarded bytes is smaller than file system size/2 then it
+# most likely overflowed
+# Btrfs is special and this test does not apply to it
+# It is because btrfs does not have not-yet-used parts of the device
+# mapped and since we got here right after the mkfs, there is not
+# enough free extents in the root tree.
+out=$("$FSTRIM" -v -l$len $SCRATCH_MNT)
+bytes=${out%% *}
+if [ $bytes -le $(_math "$fssize*512") ] && [ $FSTYP != "btrfs" ]; then
+ status=1
+ echo "It seems that fs logic handling len argument overflows"
+fi
+
+echo "Test done"
+exit
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