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xfstests: enable large fs testing on ext4

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Now that setting up large filesystem testing on sparse loopback
devices uses a generic method for filling the filesystem, extent
support to ext4 filesystems.

ext4 is slightly more complex to fill as it does not support files
larger than 16TB. Hence a slightly more complex method of using
multiple smaller files to fill the space is necessary.

WARNING: be prepared for ext4 to take forever to prepare large
filesystems as allocation of large amounts of space (especially as
it approaches ENOSPC) is can take minutes rather than milliseconds

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Rich Johnston <rjohnston@sgi.com>
Signed-off-by: Rich Johnston <rjohnston@sgi.com>
This commit is contained in:
Dave Chinner
2013-03-15 11:53:27 +00:00
committed by Rich Johnston
parent 549ec4ae72
commit e0ee997484
1 changed files with 90 additions and 0 deletions
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common.rc
+90
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@@ -366,6 +366,93 @@ _scratch_mkfs_xfs()
return $mkfs_status
}
_setup_large_ext4_fs()
{
fs_size=$1
local tmp_dir=/tmp/
[ "$LARGE_SCRATCH_DEV" != yes ] && return 0
[ -z "$SCRATCH_DEV_EMPTY_SPACE" ] && SCRATCH_DEV_EMPTY_SPACE=0
[ $SCRATCH_DEV_EMPTY_SPACE -ge $fs_size ] && return 0
# Default free space in the FS is 50GB, but you can specify more via
# SCRATCH_DEV_EMPTY_SPACE
space_to_consume=$(($fs_size - 50*1024*1024*1024 - $SCRATCH_DEV_EMPTY_SPACE))
# mount the filesystem and create 16TB - 4KB files until we consume
# all the necessary space.
_scratch_mount 2>&1 >$tmp_dir/mnt.err
local status=$?
if [ $status -ne 0 ]; then
echo "mount failed"
cat $tmp_dir/mnt.err >&2
rm -f $tmp_dir/mnt.err
return $status
fi
rm -f $tmp_dir/mnt.err
file_size=$((16*1024*1024*1024*1024 - 4096))
nfiles=0
while [ $space_to_consume -gt $file_size ]; do
xfs_io -F -f \
-c "truncate $file_size" \
-c "falloc -k 0 $file_size" \
$SCRATCH_MNT/.use_space.$nfiles 2>&1
status=$?
if [ $status -ne 0 ]; then
break;
fi
space_to_consume=$(( $space_to_consume - $file_size ))
nfiles=$(($nfiles + 1))
done
# consume the remaining space.
if [ $space_to_consume -gt 0 ]; then
xfs_io -F -f \
-c "truncate $space_to_consume" \
-c "falloc -k 0 $space_to_consume" \
$SCRATCH_MNT/.use_space.$nfiles 2>&1
status=$?
fi
umount $SCRATCH_MNT
if [ $status -ne 0 ]; then
echo "large file prealloc failed"
cat $tmp_dir/mnt.err >&2
return $status
fi
return 0
}
_scratch_mkfs_ext4()
{
local tmp_dir=/tmp/
/sbin/mkfs -t $FSTYP -- $MKFS_OPTIONS $* $SCRATCH_DEV \
2>$tmp_dir.mkfserr 1>$tmp_dir.mkfsstd
local mkfs_status=$?
if [ $mkfs_status -eq 0 -a "$LARGE_SCRATCH_DEV" = yes ]; then
# manually parse the mkfs output to get the fs size in bytes
fs_size=`cat $tmp_dir.mkfsstd | awk ' \
/^Block size/ { split($2, a, "="); bs = a[2] ; } \
/ inodes, / { blks = $3 } \
/reserved for the super user/ { resv = $1 } \
END { fssize = bs * blks - resv; print fssize }'`
_setup_large_ext4_fs $fs_size
mkfs_status=$?
fi
# output stored mkfs output
cat $tmp_dir.mkfserr >&2
cat $tmp_dir.mkfsstd
rm -f $tmp_dir.mkfserr $tmp_dir.mkfsstd
return $mkfs_status
}
_scratch_mkfs()
{
case $FSTYP in
@@ -381,6 +468,9 @@ _scratch_mkfs()
btrfs)
$MKFS_BTRFS_PROG $MKFS_OPTIONS $* $SCRATCH_DEV > /dev/null
;;
ext4)
_scratch_mkfs_ext4 $*
;;
*)
yes | $MKFS_PROG -t $FSTYP -- $MKFS_OPTIONS $* $SCRATCH_DEV
;;