From 2f03d69f9dfdc0c905c4d9cb69ee93a5256123cb 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>

---

 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 4d1cb7a4..872c21cf 100644

--- a/dracut.spec

+++ b/dracut.spec

@@ -374,6 +374,7 @@ 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