From 0954a69e884e99af5082f93e2de30fa8dfdba83e Mon Sep 17 00:00:00 2001
From: Hannes Reinecke <hare@suse.com>
Date: Mon, 25 Nov 2019 11:33:42 +0100
Subject: [PATCH] 95nvmf: add module for NVMe-oF
Add a module for booting from NVMe-oF devices.
Signed-off-by: Hannes Reinecke <hare@suse.de>
(cherry picked from commit 2f03d69f9dfdc0c905c4d9cb69ee93a5256123cb)
Resolves: #1731601
---
dracut.spec | 1 +
modules.d/95nvmf/module-setup.sh | 88 +++++++++++++++++++++++
modules.d/95nvmf/parse-nvmf-boot-connections.sh | 95 +++++++++++++++++++++++++
3 files changed, 184 insertions(+)
diff --git a/dracut.spec b/dracut.spec
index a8076c18..3db5c0cf 100644
--- a/dracut.spec
+++ b/dracut.spec
@@ -370,6 +370,7 @@ install -m 0755 51-dracut-rescue-postinst.sh $RPM_BUILD_ROOT%{_sysconfdir}/kerne
%{dracutlibdir}/modules.d/95debug
%{dracutlibdir}/modules.d/95fstab-sys
%{dracutlibdir}/modules.d/95lunmask
+%{dracutlibdir}/modules.d/95nvmf
%{dracutlibdir}/modules.d/95resume
%{dracutlibdir}/modules.d/95rootfs-block
%{dracutlibdir}/modules.d/95terminfo
diff --git a/modules.d/95nvmf/module-setup.sh b/modules.d/95nvmf/module-setup.sh
new file mode 100755
index 00000000..db43ec01
--- /dev/null
+++ b/modules.d/95nvmf/module-setup.sh
@@ -0,0 +1,88 @@
+#!/bin/bash
+
+# called by dracut
+check() {
+ require_binaries nvme || return 1
+ [ -f /etc/nvme/hostnqn ] || return 255
+ [ -f /etc/nvme/hostid ] || return 255
+
+ is_nvme_fc() {
+ local _dev=$1
+ local traddr
+
+ [[ -L "/sys/dev/block/$_dev" ]] || return 0
+ cd -P "/sys/dev/block/$_dev" || return 0
+ if [ -f partition ] ; then
+ cd ..
+ fi
+ for d in device/nvme* ; do
+ [ -L "$d" ] || continue
+ if readlink "$d" | grep -q nvme-fabrics ; then
+ traddr=$(cat "$d"/address)
+ break
+ fi
+ done
+ [[ "${traddr#traddr=nn-}" != "$traddr" ]]
+ }
+
+ [[ $hostonly ]] || [[ $mount_needs ]] && {
+ pushd . >/dev/null
+ for_each_host_dev_and_slaves is_nvme_fc
+ local _is_nvme_fc=$?
+ popd >/dev/null
+ [[ $_is_nvme_fc == 0 ]] || return 255
+ if [ ! -f /sys/class/fc/fc_udev_device/nvme_discovery ] ; then
+ if [ ! -f /etc/nvme/discovery.conf ] ; then
+ echo "No discovery arguments present"
+ return 255
+ fi
+ fi
+ }
+ return 0
+}
+
+# called by dracut
+depends() {
+ echo bash rootfs-block
+ return 0
+}
+
+# called by dracut
+installkernel() {
+ instmods nvme_fc lpfc qla2xxx
+}
+
+# called by dracut
+cmdline() {
+ local _hostnqn
+ local _hostid
+ if [ -f /etc/nvme/hostnqn ] ; then
+ _hostnqn=$(cat /etc/nvme/hostnqn)
+ echo -n " nvmf.hostnqn=${_hostnqn}"
+ fi
+ if [ -f /etc/nvme/hostid ] ; then
+ _hostid=$(cat /etc/nvme/hostid)
+ echo -n " nvmf.hostid=${_hostid}"
+ fi
+ echo ""
+}
+
+# called by dracut
+install() {
+ if [[ $hostonly_cmdline == "yes" ]]; then
+ local _nvmf_args=$(cmdline)
+ [[ "$_nvmf_args" ]] && printf "%s" "$_nvmf_args" >> "${initdir}/etc/cmdline.d/95nvmf-args.conf"
+ fi
+ inst_simple "/etc/nvme/hostnqn"
+ inst_simple "/etc/nvme/hostid"
+
+ inst_multiple nvme
+ inst_multiple -o \
+ "$systemdsystemunitdir/nvm*-connect@.service" \
+ "$systemdsystemunitdir/nvm*-connect.target"
+ inst_hook cmdline 99 "$moddir/parse-nvmf-boot-connections.sh"
+ inst_simple "/etc/nvme/discovery.conf"
+ inst_rules /usr/lib/udev/rules.d/70-nvm*-autoconnect.rules
+ inst_rules /usr/lib/udev/rules.d/71-nvmf-iopolicy-netapp.rules
+ dracut_need_initqueue
+}
diff --git a/modules.d/95nvmf/parse-nvmf-boot-connections.sh b/modules.d/95nvmf/parse-nvmf-boot-connections.sh
new file mode 100755
index 00000000..0d16b871
--- /dev/null
+++ b/modules.d/95nvmf/parse-nvmf-boot-connections.sh
@@ -0,0 +1,95 @@
+#!/bin/sh
+#
+# Supported formats:
+# nvmf.hostnqn=<hostnqn>
+# nvmf.hostid=<hostid>
+# nvmf.discover=<transport>:<traddr>:<host-traddr>:<trsvcid>
+#
+# Examples:
+# nvmf.hostnqn=nqn.2014-08.org.nvmexpress:uuid:37303738-3034-584d-5137-333230423843
+# nvmf.discover=rdma:192.168.1.3::4420
+# nvmf.discover=fc:auto
+#
+# Note: FC does autodiscovery, so typically there is no need to
+# specify any discover parameters for FC.
+#
+
+parse_nvmf_discover() {
+ OLDIFS="$IFS"
+ IFS=:
+ trtype="none"
+ traddr="none"
+ hosttraddr="none"
+ trsvcid=4420
+
+ set $1
+ IFS="$OLDIFS"
+
+ case $# in
+ 2)
+ trtype=$1
+ traddr=$2
+ ;;
+ 3)
+ trtype=$1
+ traddr=$2
+ hosttraddr=$3
+ ;;
+ 4)
+ trtype=$1
+ traddr=$2
+ hosttraddr=$3
+ trsvcid=$4
+ ;;
+ *)
+ warn "Invalid arguments for nvmf.discover=$1"
+ return 1
+ ;;
+ esac
+ if [ -z "$traddr" ] ; then
+ warn "traddr is mandatory for $trtype"
+ return 1;
+ fi
+ [ -z "$hosttraddr" ] && hosttraddr="none"
+ [ -z "$trsvcid" ] && trsvcid="none"
+ if [ "$trtype" = "fc" ] ; then
+ if [ -z "$hosttraddr" ] ; then
+ warn "host traddr is mandatory for fc"
+ return 1
+ fi
+ elif [ "$trtype" != "rdma" ] && [ "$trtype" != "tcp" ] ; then
+ warn "unsupported transport $trtype"
+ return 1
+ elif [ -z "$trsvcid" ] ; then
+ trsvcid=4420
+ fi
+ echo "--transport=$trtype --traddr=$traddr --host-traddr=$hosttraddr --trsvcid=$trsvcid" >> /etc/nvme/discovery.conf
+}
+
+if ! getargbool 0 rd.nonvmf ; then
+ info "rd.nonvmf=0: skipping nvmf"
+ return 0
+fi
+
+nvmf_hostnqn=$(getarg nvmf.hostnqn=)
+if [ -n "$nvmf_hostnqn" ] ; then
+ echo "$nvmf_hostnqn" > /etc/nvme/hostnqn
+fi
+nvmf_hostid=$(getarg nvmf.hostid=)
+if [ -n "$nvmf_hostid" ] ; then
+ echo "$nvmf_hostid" > /etc/nvme/hostid
+fi
+
+for d in $(getargs nvmf.discover=); do
+ parse_nvmf_discover "$d"
+done
+
+# Host NQN and host id are mandatory for NVMe-oF
+[ -f "/etc/nvme/hostnqn" ] || exit 0
+[ -f "/etc/nvme/hostid" ] || exit 0
+
+if [ -f "/etc/nvme/discovery.conf" ] ; then
+ /sbin/initqueue --onetime --unique --name nvme-discover /usr/sbin/nvme connect-all
+else
+ /sbin/initqueue --finished --unique --name nvme-fc-autoconnect echo 1 > /sys/class/fc/fc_udev_device/nvme_discovery
+fi