2 # SPDX-License-Identifier: GPL-2.0
3 # Copyright (c) 2013 Red Hat, Inc., Tomas Racek <tracek@redhat.com>
7 # Test that filesystem sends discard requests only on free blocks
10 seqres=$RESULT_DIR/$seq
11 echo "QA output created by $seq"
13 status=1 # failure is the default!
14 trap "_cleanup; exit \$status" 0 1 2 3 15
18 _supported_fs ext4 xfs
23 _require_xfs_io_command "fiemap"
24 _require_fs_space $TEST_DIR 307200
25 [ "$FSTYP" = "ext4" ] && _require_dumpe2fs
29 $UMOUNT_PROG $loop_dev &> /dev/null
30 _destroy_loop_device $loop_dev
31 if [ $status -eq 0 ]; then
39 $XFS_IO_PROG -F -c fiemap $1 | grep hole | $SED_PROG 's/.*\[\(.*\)\.\.\(.*\)\].*/\1 \2/'
46 $DUMPE2FS_PROG $img_file 2>&1 | grep " Free blocks" | cut -d ":" -f2- | \
47 tr ',' '\n' | $SED_PROG 's/^ //' | \
48 $AWK_PROG -v spb=$sectors_per_block 'BEGIN{FS="-"};
50 if($2 != "") # range of blocks
51 print spb * $1, spb * ($2 + 1) - 1;
52 else # just single block
53 print spb * $1, spb * ($1 + 1) - 1;
57 agsize=`$XFS_INFO_PROG $loop_mnt | $SED_PROG -n 's/.*agsize=\(.*\) blks.*/\1/p'`
58 # Convert free space (agno, block, length) to (start sector, end sector)
59 $UMOUNT_PROG $loop_mnt
60 $XFS_DB_PROG -r -c "freesp -d" $img_file | $SED_PROG '/^.*from/,$d'| \
61 $AWK_PROG -v spb=$sectors_per_block -v agsize=$agsize \
62 '{ print spb * ($1 * agsize + $2), spb * ($1 * agsize + $2 + $3) - 1 }'
69 # Merges consecutive ranges from two input files
73 tmp_file=$tmp/sectors.tmp
75 cat $file1 $file2 | sort -n > $tmp_file
81 # Continue from second line
87 if [ `expr $end + 1` -ge $curr_start ]; then
88 if [ $curr_end -gt $end ]; then
107 img_file=$TEST_DIR/$$.fs
108 dd if=/dev/zero of=$img_file bs=1M count=300 &> /dev/null
110 loop_dev=$(_create_loop_device $img_file)
111 loop_mnt=$tmp/loop_mnt
113 fiemap_ref="$tmp/reference"
114 fiemap_after="$tmp/after"
115 free_sectors="$tmp/free_sectors"
116 merged_sectors="$tmp/merged_free_sectors"
120 [ "$FSTYP" = "xfs" ] && MKFS_OPTIONS="-f $MKFS_OPTIONS"
123 _mount $loop_dev $loop_mnt
125 echo -n "Generating garbage on loop..."
126 # Goal is to fill it up, ignore any errors.
127 for i in `seq 1 10`; do
128 mkdir $loop_mnt/$i &> /dev/null
129 cp -r $here/* $loop_mnt/$i &> /dev/null || break
132 # Get reference fiemap, this can contain i.e. uninitialized inode table
134 get_holes $img_file > $fiemap_ref
137 find $loop_mnt -type f -print | $AWK_PROG \
138 'BEGIN {srand()}; {if(rand() > 0.7) print $1;}' | xargs rm
141 echo -n "Running fstrim..."
142 $FSTRIM_PROG $loop_mnt &> /dev/null
145 echo -n "Detecting interesting holes in image..."
146 # Get after-trim fiemap
148 get_holes $img_file > $fiemap_after
151 echo -n "Comparing holes to the reported space from FS..."
153 block_size=$(_get_block_size $loop_mnt/)
154 sectors_per_block=`expr $block_size / 512`
156 # Obtain free space from filesystem
157 get_free_sectors > $free_sectors
158 # Merge original holes with free sectors
159 merge_ranges $fiemap_ref $free_sectors > $merged_sectors
161 # Check that all holes after fstrim call were already present before or
162 # that they match free space reported from FS
166 if ! $AWK_PROG -v s=$from -v e=$to \
167 '{ if ($1 <= s && e <= $2) found = 1};
168 END { if(found) exit 0; else exit 1}' $merged_sectors
170 echo "Sectors $from-$to are not marked as free!"