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#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2022 IBM. All Rights Reserved.
#
# We don't currently support resize of EXT4 filesystems mounted
# with sparse_super2 option enabled. Earlier, kernel used to leave the resize
# incomplete and the fs would be left into an incomplete state, however commit
# b1489186cc83[1] fixed this to avoid the fs corruption by clearly returning
# -ENOTSUPP.
#
# This test ensures that kernel handles resizing with sparse_super2 correctly
#
# Related commit in mainline:
#
# [1] commit b1489186cc8391e0c1e342f9fbc3eedf6b944c61
# ext4: add check to prevent attempting to resize an fs with sparse_super2
#
. ./common/preamble
_begin_fstest auto ioctl resize quick
# real QA test starts here
INITIAL_FS_SIZE=1G
RESIZED_FS_SIZE=$((2*1024*1024*1024)) # 2G
ONLINE_RESIZE_BLOCK_LIMIT=$((256*1024*1024))
STOP_ITER=255 # Arbitrary return code
_supported_fs ext4
_require_scratch_size $(($RESIZED_FS_SIZE/1024))
_require_test_program "ext4_resize"
log()
{
echo "$seq: $*" >> $seqres.full 2>&1
}
do_resize()
{
_mkfs_dev -E resize=$ONLINE_RESIZE_BLOCK_LIMIT -O sparse_super2 \
$SCRATCH_DEV $INITIAL_FS_SIZE >> $seqres.full 2>&1 \
|| _fail "$MKFS_PROG failed. Exiting"
_scratch_mount || _fail "Failed to mount scratch partition. Exiting"
local BS=$(_get_block_size $SCRATCH_MNT)
local REQUIRED_BLOCKS=$(($RESIZED_FS_SIZE/$BS))
local RESIZE_RET
local EOPNOTSUPP=95
log "Resizing FS"
$here/src/ext4_resize $SCRATCH_MNT $REQUIRED_BLOCKS >> $seqres.full 2>&1
RESIZE_RET=$?
# Test appears to be successful. Stop iterating and confirm if FS is
# consistent.
if [ $RESIZE_RET = $EOPNOTSUPP ]; then
log "Resize operation not supported with sparse_super2"
log "Threw expected error $RESIZE_RET (EOPNOTSUPP)"
return $STOP_ITER
fi
# Test appears to be unsuccessful. Most probably, the fs is corrupt,
# iterate a few more times to further stress test this.
log "Something is wrong. Output of resize = $RESIZE_RET. \
Expected $EOPNOTSUPP (EOPNOTSUPP)"
# unmount after ioctl sometimes fails with "device busy" so add a small
# delay
sleep 0.2
_scratch_unmount >> $seqres.full 2>&1 \
|| _fail "$UMOUNT_PROG failed. Exiting"
}
run_test()
{
local FSCK_RET
local ITERS=8
local RET=0
for i in $(seq 1 $ITERS); do
log "----------- Iteration: $i ------------"
do_resize
RET=$?
[ "$RET" = "$STOP_ITER" ] && break
done
log "-------- Iterations Complete ---------"
log "Checking if FS is in consistent state"
_check_scratch_fs
}
echo "Silence is golden"
run_test
status=0
exit
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