tests/generic/367

#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2024 Nirjhar Roy (nirjhar@linux.ibm.com).  All Rights Reserved.
#
# FS QA Test 367
#
# This test verifies that extent allocation hint setting works correctly on
# files with no extents allocated and non-empty files which are truncated.
# It also checks that the  extent hints setting fails with non-empty file
# i.e, with any file with allocated extents or delayed allocation. We also
# check if the extsize value and the xflag bit actually got reflected after
# setting/re-setting the extsize value.

. ./common/filter
. ./common/preamble

_begin_fstest ioctl quick

[ "$FSTYP" = "xfs" ] && _fixed_by_kernel_commit 2a492ff66673 \
	"xfs: Check for delayed allocations before setting extsize"

_require_scratch_extsize

FILE_DATA_SIZE=1M

get_default_extsize()
{
    if [ -z $1 ] || [ ! -d $1 ]; then
        echo "Missing mount point argument for get_default_extsize"
        exit 1
    fi
    $XFS_IO_PROG -c "extsize" "$1" | sed 's/^\[\([0-9]\+\)\].*/\1/'
}

filter_extsz()
{
    sed "s/\[$1\]/\[EXTSIZE\]/g"
}

setup()
{
    _scratch_mkfs >> "$seqres.full"  2>&1
    _scratch_mount >> "$seqres.full" 2>&1
    BLKSZ=`_get_block_size $SCRATCH_MNT`
    DEFAULT_EXTSIZE=`get_default_extsize $SCRATCH_MNT`
    EXTSIZE=$(( BLKSZ*2 ))
    # Make sure the new extsize is not the same as the default
    # extsize so that we can observe it changing
    [[ "$DEFAULT_EXTSIZE" -eq "$EXTSIZE" ]] && EXTSIZE=$(( BLKSZ*4 ))
}

read_file_extsize()
{
    $XFS_IO_PROG -c "extsize" $1 | _filter_scratch | filter_extsz $2
}

check_extsz_and_xflag()
{
    local filename=$1
    local extsize=$2
    read_file_extsize $filename $extsize
    _test_fsxattr_xflag $filename "extsize" && echo "e flag set" || \
	    echo "e flag unset"
}

check_extsz_xflag_across_remount()
{
    local filename=$1
    local extsize=$2
    _scratch_cycle_mount
    check_extsz_and_xflag $filename $extsize
}

# Extsize flag should be cleared when extsize is reset, so this function
# checks that this behavior is followed.
reset_extsz_and_recheck_extsz_xflag()
{
    local filename=$1
    echo "Re-setting extsize hint to 0"
    $XFS_IO_PROG -c "extsize 0" $filename
    check_extsz_xflag_across_remount $filename "0"
}

check_extsz_xflag_before_and_after_reset()
{
    local filename=$1
    local extsize=$2
    check_extsz_xflag_across_remount $filename $extsize
    reset_extsz_and_recheck_extsz_xflag $filename
}

test_empty_file()
{
    echo "TEST: Set extsize on empty file"
    local filename=$1
    $XFS_IO_PROG \
        -c "open -f $filename" \
        -c "extsize $EXTSIZE" \

    check_extsz_xflag_before_and_after_reset $filename $EXTSIZE
    echo
}

test_data_delayed()
{
    echo "TEST: Set extsize on non-empty file with delayed allocation"
    local filename=$1
    $XFS_IO_PROG \
        -c "open -f $filename" \
        -c "pwrite -q  0 $FILE_DATA_SIZE" \
        -c "extsize $EXTSIZE" | _filter_scratch

    echo "test for default extsize setting if any"
    read_file_extsize $filename $DEFAULT_EXTSIZE
    echo
}

test_data_allocated()
{
    echo "TEST: Set extsize on non-empty file with allocated extents"
    local filename=$1
    $XFS_IO_PROG \
        -c "open -f $filename" \
        -c "pwrite -qW  0 $FILE_DATA_SIZE" \
        -c "extsize $EXTSIZE" | _filter_scratch

    echo "test for default extsize setting if any"
    read_file_extsize $filename $DEFAULT_EXTSIZE
    echo
}

test_truncate_allocated()
{
    echo "TEST: Set extsize after truncating a file with allocated extents"
    local filename=$1
    $XFS_IO_PROG \
        -c "open -f $filename" \
        -c "pwrite -qW  0 $FILE_DATA_SIZE" \
        -c "truncate 0" \
        -c "extsize $EXTSIZE" \

    check_extsz_xflag_across_remount $filename $EXTSIZE
    echo
}

test_truncate_delayed()
{
    echo "TEST: Set extsize after truncating a file with delayed allocation"
    local filename=$1
    $XFS_IO_PROG \
        -c "open -f $filename" \
        -c "pwrite -q  0 $FILE_DATA_SIZE" \
        -c "truncate 0" \
        -c "extsize $EXTSIZE" \

    check_extsz_xflag_across_remount $filename $EXTSIZE
    echo
}

setup
echo -e "EXTSIZE = $EXTSIZE DEFAULT_EXTSIZE = $DEFAULT_EXTSIZE \
	BLOCKSIZE = $BLKSZ\n" >> "$seqres.full"

NEW_FILE_NAME_PREFIX=$SCRATCH_MNT/new-file-

test_empty_file "$NEW_FILE_NAME_PREFIX"00
test_data_delayed "$NEW_FILE_NAME_PREFIX"01
test_data_allocated "$NEW_FILE_NAME_PREFIX"02
test_truncate_allocated "$NEW_FILE_NAME_PREFIX"03
test_truncate_delayed "$NEW_FILE_NAME_PREFIX"04

status=0
exit