nvme_local: add standalone (zram backed) NVMe loop scripts

Provision a single zram device and expose/map it via NVMe loopback.

Signed-off-by: David Disseldorp <ddiss@suse.de>

diff --git a/cut_nvme_local.sh b/cut_nvme_local.sh
new file mode 100755 (executable)
index 0000000..e4c6307
--- /dev/null
+++ b/cut_nvme_local.sh
@@ -0,0 +1,33 @@
+#!/bin/bash
+#
+# Copyright (C) SUSE LINUX GmbH 2017, all rights reserved.
+#
+# This library is free software; you can redistribute it and/or modify it
+# under the terms of the GNU Lesser General Public License as published
+# by the Free Software Foundation; either version 2.1 of the License, or
+# (at your option) version 3.
+#
+# This library is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+# or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
+# License for more details.
+
+RAPIDO_DIR="$(realpath -e ${0%/*})"
+. "${RAPIDO_DIR}/runtime.vars"
+
+KVER="`cat ${KERNEL_SRC}/include/config/kernel.release`" || exit 1
+dracut --no-compress  --kver "$KVER" \
+       --install "tail blockdev ps rmdir resize dd vim grep find df sha256sum \
+                  strace mkfs.xfs /lib64/libkeyutils.so.1" \
+       --include "$CEPH_CONF" "/etc/ceph/ceph.conf" \
+       --include "$CEPH_KEYRING" "/etc/ceph/keyring" \
+       --include "$RBD_NAMER_BIN" "/usr/bin/ceph-rbdnamer" \
+       --include "$RBD_UDEV_RULES" "/usr/lib/udev/rules.d/50-rbd.rules" \
+       --include "$RAPIDO_DIR/nvme_local_autorun.sh" "/.profile" \
+       --include "$RAPIDO_DIR/rapido.conf" "/rapido.conf" \
+       --include "$RAPIDO_DIR/vm_autorun.env" "/vm_autorun.env" \
+       --add-drivers "nvme-core nvme-fabrics nvme-loop nvmet zram lzo" \
+       --no-hostonly --no-hostonly-cmdline \
+       --modules "bash base network ifcfg" \
+       --tmpdir "$RAPIDO_DIR/initrds/" \
+       --force $DRACUT_OUT

diff --git a/nvme_local_autorun.sh b/nvme_local_autorun.sh
new file mode 100755 (executable)
index 0000000..656f54c
--- /dev/null
+++ b/nvme_local_autorun.sh
@@ -0,0 +1,92 @@
+#!/bin/bash
+#
+# Copyright (C) SUSE LINUX GmbH 2017, all rights reserved.
+#
+# This library is free software; you can redistribute it and/or modify it
+# under the terms of the GNU Lesser General Public License as published
+# by the Free Software Foundation; either version 2.1 of the License, or
+# (at your option) version 3.
+#
+# This library is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+# or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
+# License for more details.
+
+if [ ! -f /vm_autorun.env ]; then
+       echo "Error: autorun scripts must be run from within an initramfs VM"
+       exit 1
+fi
+
+. /vm_autorun.env
+
+function _zram_hot_add() {
+       [ -e /sys/class/zram-control/hot_add ] \
+               || _fatal "zram hot_add sysfs path missing (old kernel?)"
+
+       local zram_size="$1"
+       local zram_num=$(cat /sys/class/zram-control/hot_add) \
+               || _fatal "zram hot add failed"
+       local zram_dev="/dev/zram${zram_num}"
+
+       echo "$zram_size" > \
+               /sys/devices/virtual/block/zram${zram_num}/disksize \
+               || _fatal "failed to set size for $zram_dev"
+       echo "$zram_dev"
+}
+
+set -x
+
+#### start udevd
+ps -eo args | grep -v grep | grep /usr/lib/systemd/systemd-udevd \
+       || /usr/lib/systemd/systemd-udevd --daemon
+
+cat /proc/mounts | grep debugfs &> /dev/null
+if [ $? -ne 0 ]; then
+       mount -t debugfs debugfs /sys/kernel/debug/
+fi
+
+cat /proc/mounts | grep configfs &> /dev/null
+if [ $? -ne 0 ]; then
+       mount -t configfs configfs /sys/kernel/config/
+fi
+
+modprobe nvme-core
+modprobe nvme-fabrics
+modprobe nvme-loop
+modprobe nvmet
+modprobe zram num_devices="0"
+
+for i in $DYN_DEBUG_MODULES; do
+       echo "module $i +pf" > /sys/kernel/debug/dynamic_debug/control || _fatal
+done
+for i in $DYN_DEBUG_FILES; do
+       echo "file $i +pf" > /sys/kernel/debug/dynamic_debug/control || _fatal
+done
+
+export_blockdev=$(_zram_hot_add "1G")
+[ -b "$export_blockdev" ] || _fatal "$export_blockdev device not available"
+
+nvmet_cfs="/sys/kernel/config/nvmet/"
+nvmet_subsystem="nvmf-test"
+mkdir -p ${nvmet_cfs}/subsystems/${nvmet_subsystem} || _fatal
+echo 1 > ${nvmet_cfs}/subsystems/${nvmet_subsystem}/attr_allow_any_host \
+       || _fatal
+mkdir ${nvmet_cfs}/subsystems/${nvmet_subsystem}/namespaces/1 || _fatal
+echo -n $export_blockdev \
+       > ${nvmet_cfs}/subsystems/${nvmet_subsystem}/namespaces/1/device_path \
+       || _fatal
+echo -n 1 \
+       > ${nvmet_cfs}/subsystems/${nvmet_subsystem}/namespaces/1/enable \
+       || _fatal
+
+mkdir ${nvmet_cfs}/ports/1 || _fatal
+echo loop > ${nvmet_cfs}/ports/1/addr_trtype || _fatal
+
+ln -s ${nvmet_cfs}/subsystems/${nvmet_subsystem} \
+       ${nvmet_cfs}/ports/1/subsystems/${nvmet_subsystem} || _fatal
+
+echo "transport=loop,nqn=${nvmet_subsystem}" > /dev/nvme-fabrics || _fatal
+
+set +x
+
+echo "$export_blockdev mapped via NVMe loopback"