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

@@ -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

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
+}

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