functional/compression/compress_004_pos.ksh

#!/bin/ksh -p
#
# CDDL HEADER START
#
# The contents of this file are subject to the terms of the
# Common Development and Distribution License (the "License").
# You may not use this file except in compliance with the License.
#
# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
# or http://www.opensolaris.org/os/licensing.
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# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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#
# Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
# Use is subject to license terms.
#

#
# Copyright (c) 2013, 2016 by Delphix. All rights reserved.
#

. $STF_SUITE/include/libtest.shlib

#
# DESCRIPTION:
# With 'compression' set, a file with non-power-of-2 blocksize storage space
# can be freed as will normally.
#
# STRATEGY:
#   1. Set 'compression' or 'compress' to on or lzjb
#   2. Set different recordsize with ZFS filesystem
#   3. Repeatedly using 'randfree_file' to create a file and then free its
#      storage space with different range, the system should work normally.
#

verify_runnable "both"

function cleanup
{
    rm -f $TESTDIR/*
}

function create_free_testing #<file size> <file>
{
    typeset -i fsz=$1
    typeset file=$2
    typeset -i start=0
    typeset -i len=0
    typeset -i dist=0

    for start in 0 `expr $RANDOM % $fsz`
    do
        (( dist = fsz - start ))
        for len in `expr $RANDOM % $dist` $dist \
            `expr $start + $dist`; do
            log_must randfree_file -l fsz -s $start \
                -n $len $file
            [[ -e $file ]] && \
                log_must rm -f $file
        done
    done
}


log_assert "Creating non-power-of-2 blocksize file and freeing the file \
    storage space at will should work normally with compression setting"
log_onexit cleanup

fs=$TESTPOOL/$TESTFS
single_blk_file=$TESTDIR/singleblkfile.$$
multi_blk_file=$TESTDIR/multiblkfile.$$
typeset -i blksize=512
typeset -i fsize=0
typeset -i avail=0
typeset -i blknum=0

for propname in "compression" "compress"
do
    for value in $(get_compress_opts zfs_compress)
    do
        log_must zfs set compression=$value $fs
        real_val=$(get_prop $propname $fs)
        if [[ $value == "gzip-6" ]]; then
            value="gzip"
        fi
                [[ $real_val != $value ]] && \
                        log_fail "Set property $propname=$value failed."

        (( blksize = 512 ))
        while (( blksize <= 131072 )); do
            log_must zfs set recordsize=$blksize $fs

            # doing single block testing
            (( fsize = $RANDOM ))
            if (( fsize > blksize )); then
                (( fsize = fsize % blksize ))
            fi
            if (( (fsize % 2) == 0 )); then
                #make sure fsize is non-power-of-2
                (( fsize = fsize + 1 ))
            fi
            create_free_testing $fsize $single_blk_file

            # doing multiple blocks testing
            avail=$(get_prop available $fs)
            (( blknum = avail / blksize ))
            # we just test <10 multi-blocks to limit testing time
            (( blknum = blknum % 9 ))
            while (( blknum < 2 )); do
                (( blknum = blknum + $RANDOM % 9 ))
            done
            if (( (blknum % 2) == 0 )); then
                (( blknum = blknum + 1 )) # keep blknum as odd
            fi
            (( fsize = blknum * blksize ))
            create_free_testing $fsize $multi_blk_file

            (( blksize = blksize * 2 ))
        done
    done
done

log_pass "Creating and freeing non-power-of-2 blocksize file work as expected."