Adding upstream version 2:4.17.12+dfsg.upstream/2%4.17.12+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 441 insertions, 0 deletions

diff --git a/ctdb/config/nfs-linux-kernel-callout b/ctdb/config/nfs-linux-kernel-callout
new file mode 100755
index 0000000..f2f3e38
--- /dev/null
+++ b/ctdb/config/nfs-linux-kernel-callout
@@ -0,0 +1,441 @@
+#!/bin/sh
+
+# Exit on 1st error
+set -e
+
+# NFS exports file.  Some code below keeps a cache of output derived
+# from exportfs(8).  When this file is updated the cache is invalid
+# and needs to be regenerated.
+#
+# To change the file, edit the default value below.  Do not set
+# CTDB_NFS_EXPORTS_FILE - it isn't a configuration variable, just a
+# hook for testing.
+nfs_exports_file="${CTDB_NFS_EXPORTS_FILE:-/var/lib/nfs/etab}"
+
+# As above, edit the default value below.  CTDB_NFS_DISTRO_STYLE is a
+# test variable only.
+nfs_distro_style="${CTDB_NFS_DISTRO_STYLE:-systemd-redhat}"
+
+# As above, edit the default value below.  CTDB_SYS_ETCDIR is a
+# test variable only.
+etc_dir="${CTDB_SYS_ETCDIR:-/etc}"
+
+# A value of "AUTO" for any service means that service is usually
+# automatically started and stopped by one of the other services.
+# Such services will still be restarted by hand on failure, if
+# configured to do so.  This allows services that should not be
+# running to be set to "".
+
+case "$nfs_distro_style" in
+systemd-*)
+	# Defaults
+	nfs_service="nfs-server"
+	nfs_lock_service="rpc-statd"
+	nfs_mountd_service="nfs-mountd"
+	nfs_status_service="rpc-statd"
+	nfs_rquotad_service="rpc-rquotad"
+	nfs_config="${etc_dir}/sysconfig/nfs"
+	nfs_rquotad_config="" # Not use with systemd, restart via service
+
+	case "$nfs_distro_style" in
+	*-redhat | *-suse)
+		: # Defaults only
+		;;
+	*-debian)
+		nfs_rquotad_service="quotarpc"
+		;;
+	*)
+		echo "Internal error"
+		exit 1
+		;;
+	esac
+	;;
+
+sysvinit-*)
+	# Defaults
+	nfs_service="nfs"
+	nfs_lock_service="AUTO"
+	nfs_mountd_service="AUTO"
+	nfs_status_service="AUTO"
+	nfs_rquotad_service="AUTO"
+	nfs_config="${etc_dir}/sysconfig/nfs"
+	nfs_rquotad_config="$nfs_config"
+
+	case "$nfs_distro_style" in
+	*-redhat)
+		nfs_lock_service="nfslock"
+		;;
+	*-suse)
+		nfs_service="nfsserver"
+		;;
+	*-debian)
+		nfs_service="nfs-kernel-server"
+		nfs_config="${etc_dir}/default/nfs-kernel-server"
+		nfs_rquotad_config="${etc_dir}/default/quota"
+		;;
+	*)
+		echo "Internal error"
+		exit 1
+		;;
+	esac
+	;;
+
+*)
+	echo "Internal error"
+	exit 1
+	;;
+esac
+
+# Override for unit testing
+if [ -z "$PROCFS_PATH" ]; then
+	PROCFS_PATH="/proc"
+fi
+
+##################################################
+
+usage()
+{
+	_c=$(basename "$0")
+	cat <<EOF
+usage: $_c { shutdown | startup }
+       $_c { stop | start } { nfs | nlockmgr }
+       $_c { monitor-list-shares | monitor-post }
+       $_c { register }
+EOF
+	exit 1
+}
+
+##################################################
+
+nfs_load_config()
+{
+	_config="${1:-${nfs_config}}"
+
+	if [ -r "$_config" ]; then
+		. "$_config"
+	fi
+}
+
+##################################################
+
+service_is_auto_started()
+{
+	[ "$1" = "AUTO" ]
+}
+
+service_is_defined()
+{
+	_service="$1"
+
+	[ -n "$_service" ] && ! service_is_auto_started "$_service"
+}
+
+service_if_defined()
+{
+	_service="$1"
+	_action="$2"
+
+	if service_is_defined "$_service"; then
+		service "$_service" "$_action"
+	fi
+}
+
+##################################################
+# Overall NFS service stop and start
+
+nfs_service_stop()
+{
+	service_if_defined "$nfs_rquotad_service" stop
+
+	service "$nfs_service" stop
+
+	service_if_defined "$nfs_lock_service" stop
+}
+
+nfs_service_start()
+{
+	service_if_defined "$nfs_lock_service" start
+
+	service "$nfs_service" start
+
+	service_if_defined "$nfs_rquotad_service" start
+}
+
+##################################################
+# service "stop" and "start" options for restarting
+
+manual_stop()
+{
+	case "$1" in
+	mountd)
+		killall -q -9 rpc.mountd
+		;;
+	rquotad)
+		killall -q -9 rpc.rquotad
+		;;
+	status)
+		killall -q -9 rpc.statd
+		;;
+	*)
+		echo "$0: Internal error - invalid call to manual_stop()"
+		exit 1
+		;;
+	esac
+}
+
+service_or_manual_stop()
+{
+	_rpc_service="$1"
+	_system_service="$2"
+
+	if service_is_defined "$_system_service"; then
+		service "$_system_service" stop
+	elif service_is_auto_started "$_system_service"; then
+		manual_stop "$_rpc_service"
+	fi
+}
+
+service_stop()
+{
+	_rpc_service="$1"
+
+	case "$_rpc_service" in
+	nfs)
+		echo 0 >"${PROCFS_PATH}/fs/nfsd/threads"
+		nfs_service_stop >/dev/null 2>&1 || true
+		pkill -9 nfsd
+		;;
+	nlockmgr)
+		if service_is_defined "$nfs_lock_service" ; then
+			service "$nfs_lock_service" stop >/dev/null 2>&1 || true
+		else
+			service "$nfs_service" stop >/dev/null 2>&1 || true
+		fi
+		;;
+	mountd)
+		service_or_manual_stop "$_rpc_service" "$nfs_mountd_service"
+		;;
+	rquotad)
+		service_or_manual_stop "$_rpc_service" "$nfs_rquotad_service"
+		;;
+	status)
+		service_or_manual_stop "$_rpc_service" "$nfs_status_service"
+		;;
+	*)
+		usage
+		;;
+	esac
+}
+
+manual_start()
+{
+	case "$1" in
+	mountd)
+		nfs_load_config
+		if [ -z "$RPCMOUNTDOPTS" ]; then
+			RPCMOUNTDOPTS="${MOUNTD_PORT:+-p }$MOUNTD_PORT"
+		fi
+		# shellcheck disable=SC2086
+		rpc.mountd $RPCMOUNTDOPTS
+		;;
+	rquotad)
+		nfs_load_config "$nfs_rquotad_config"
+		if [ -z "$RPCRQUOTADOPTS" ]; then
+			RPCRQUOTADOPTS="${RQUOTAD_PORT:+-p }$RQUOTAD_PORT"
+		fi
+		# shellcheck disable=SC2086
+		rpc.rquotad $RPCRQUOTADOPTS
+		;;
+	status)
+		nfs_load_config
+		# Red Hat uses STATDARG, Debian uses STATDOPTS
+		opts="${STATDARG:-${STATDOPTS:-''}}"
+		if [ -z "$opts" ]; then
+			# shellcheck disable=SC2086
+			set -- \
+				${STATD_HA_CALLOUT:+-H} $STATD_HA_CALLOUT \
+				${STATD_HOSTNAME:+-n} $STATD_HOSTNAME \
+				${STATD_PORT:+-p} $STATD_PORT \
+				${STATD_OUTGOING_PORT:+-o} $STATD_OUTGOING_PORT
+			opts="$*"
+		fi
+		# shellcheck disable=SC2086
+		rpc.statd $opts
+		;;
+	*)
+		echo "$0: Internal error - invalid call to manual_start()"
+		exit 1
+		;;
+	esac
+}
+
+service_or_manual_start()
+{
+	_rpc_service="$1"
+	_system_service="$2"
+
+	if service_is_defined "$_system_service"; then
+		service "$_system_service" start
+	elif service_is_auto_started "$_system_service"; then
+		manual_start "$_rpc_service"
+	fi
+}
+
+service_start()
+{
+	_rpc_service="$1"
+
+	case "$_rpc_service" in
+	nfs)
+		nfs_service_start
+		;;
+	nlockmgr)
+		if service_is_defined "$nfs_lock_service" ; then
+			service "$nfs_lock_service" start
+		else
+			service "$nfs_service" start
+		fi
+		;;
+	mountd)
+		service_or_manual_start "$_rpc_service" "$nfs_mountd_service"
+		;;
+	rquotad)
+		service_or_manual_start "$_rpc_service" "$nfs_rquotad_service"
+		;;
+	status)
+		service_or_manual_start "$_rpc_service" "$nfs_status_service"
+		;;
+	*)
+		usage
+		;;
+	esac
+}
+
+##################################################
+# service init startup and final shutdown
+
+nfs_shutdown()
+{
+	nfs_service_stop
+}
+
+nfs_startup()
+{
+	nfs_service_stop || true
+	nfs_service_start
+	_f="${PROCFS_PATH}/sys/net/ipv4/tcp_tw_recycle"
+	if [ -f "$_f" ]; then
+		echo 1 >"$_f"
+	fi
+}
+
+##################################################
+# monitor-post support
+
+nfs_check_thread_count()
+{
+	# Load NFS configuration to get desired number of threads.
+	nfs_load_config
+
+	# If $RPCNFSDCOUNT/$USE_KERNEL_NFSD_NUMBER isn't set then we could
+	# guess the default from the initscript.  However, let's just
+	# assume that those using the default don't care about the number
+	# of threads and that they have switched on this feature in error.
+	_configured_threads="${RPCNFSDCOUNT:-${USE_KERNEL_NFSD_NUMBER}}"
+	if [ -z "$_configured_threads" ] && type nfsconf >/dev/null 2>&1; then
+		_configured_threads=$(nfsconf --get nfsd threads) || true
+	fi
+	[ -n "$_configured_threads" ] || return 0
+
+	_threads_file="${PROCFS_PATH}/fs/nfsd/threads"
+
+	# nfsd should be running the configured number of threads.  If
+	# there are a different number of threads then tell nfsd the
+	# correct number.
+	read -r _running_threads <"$_threads_file" || {
+		echo "WARNING: Reading \"${_threads_file}\" unexpectedly failed"
+		exit 0
+	}
+
+	# Intentionally not arithmetic comparison - avoids extra errors
+	# when above read fails in an unexpected way...
+	if [ "$_running_threads" != "$_configured_threads" ]; then
+		echo "Attempting to correct number of nfsd threads from ${_running_threads} to ${_configured_threads}"
+		echo "$_configured_threads" >"$_threads_file"
+	fi
+}
+
+##################################################
+# list share directories
+
+nfs_monitor_list_shares()
+{
+	_cache_file="${CTDB_NFS_CALLOUT_STATE_DIR}/list_shares_cache"
+	# -nt operator is well supported in Linux: dash, bash, ksh, ...
+	# shellcheck disable=SC2039,SC3013
+	if [ ! -r "$nfs_exports_file" ] || [ ! -r "$_cache_file" ] ||
+		[ "$nfs_exports_file" -nt "$_cache_file" ]; then
+		mkdir -p "$CTDB_NFS_CALLOUT_STATE_DIR"
+		# We could just use the contents of $nfs_exports_file.
+		# However, let's regard that file as internal to NFS and use
+		# exportfs, which is the public API.
+		if ! _exports=$(exportfs -v); then
+			echo "WARNING: failed to run exportfs to list NFS shares" >&2
+			return
+		fi
+
+		echo "$_exports" |
+			grep '^/' |
+			sed -e 's@[[:space:]][[:space:]]*[^[:space:]()][^[:space:]()]*([^[:space:]()][^[:space:]()]*)$@@' |
+			sort -u >"$_cache_file"
+	fi
+
+	cat "$_cache_file"
+}
+
+##################################################
+
+nfs_register()
+{
+	cat <<EOF
+shutdown
+startup
+stop
+start
+monitor-list-shares
+monitor-post
+EOF
+}
+
+##################################################
+
+case "$1" in
+shutdown)
+	nfs_shutdown
+	;;
+startup)
+	nfs_startup
+	;;
+stop)
+	service_stop "$2"
+	;;
+start)
+	service_start "$2"
+	;;
+monitor-list-shares)
+	nfs_monitor_list_shares
+	;;
+monitor-post)
+	nfs_check_thread_count
+	;;
+register)
+	nfs_register
+	;;
+monitor-pre | releaseip | takeip | releaseip-pre | takeip-pre)
+	# Not required/implemented
+	:
+	;;
+*)
+	usage
+	;;
+esac