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# vim: filetype=sh
# SPDX-License-Identifier: BSD-2-Clause
#
# Copyright (c) 2024 Axcient
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS DOCUMENTATION IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
find_device() {
LUN=$1
# Rescan camsim
# XXX camsim doesn't update when creating a new device. Worse, a
# rescan won't look for new devices. So we must disable/re-enable it.
# Worse still, enabling it isn't synchronous, so we need a retry loop
# https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=281000
retries=5
ctladm port -o off -p 0 >/dev/null
ctladm port -o on -p 0 >/dev/null
HEXLUN=`printf %x $LUN`
while true; do
dev=`camcontrol devlist | awk -v lun=$HEXLUN '
/FREEBSD CTL.*,pass/ && $9==lun {
split($10, fields, /[,]/); print fields[1];
}
/FREEBSD CTL.*\(pass/ && $9==lun {
split($10, fields, /[,]/); print fields[2];
}
' | sed 's:[()]::'`
if [ -z "$dev" -o ! -c /dev/$dev ]; then
retries=$(( $retries - 1 ))
if [ $retries -eq 0 ]; then
cat lun-create.txt
camcontrol devlist
atf_fail "Could not find GEOM device"
fi
sleep 0.1
continue
fi
break
done
# Ensure that it's actually ready. camcontrol may report the disk's
# ident before it's actually ready to receive commands. Maybe that's
# because all of the GEOM providers must probe it?
while true; do
dd if=/dev/$dev bs=4096 count=1 of=/dev/null >/dev/null 2>/dev/null && break
retries=$(( $retries - 1 ))
if [ $retries -eq 0 ]; then
atf_fail "Device never became ready"
fi
sleep 0.1
done
}
# Create a CTL LUN backed by a file
create_block() {
EXTRA_ARGS=$*
atf_check -o save:lun-create.txt ctladm create -b block $EXTRA_ARGS
atf_check egrep -q "LUN created successfully" lun-create.txt
LUN=`awk '/LUN ID:/ {print $NF}' lun-create.txt`
if [ -z "$LUN" ]; then
atf_fail "Could not find LUN id"
fi
find_device $LUN
}
# Create a CTL LUN backed by RAM
create_ramdisk() {
EXTRA_ARGS=$*
atf_check -o save:lun-create.txt ctladm create -b ramdisk -s 1048576 $EXTRA_ARGS
atf_check egrep -q "LUN created successfully" lun-create.txt
LUN=`awk '/LUN ID:/ {print $NF}' lun-create.txt`
if [ -z "$LUN" ]; then
atf_fail "Could not find LUN id"
fi
find_device $LUN
}
cleanup() {
if [ -e "lun-create.txt" ]; then
backend=`awk '/backend:/ {print $NF}' lun-create.txt`
lun_id=`awk '/LUN ID:/ {print $NF}' lun-create.txt`
ctladm remove -b $backend -l $lun_id > /dev/null
fi
}
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