[MountVmStore] Support passing custom mount options

1 files changed, 118 insertions, 67 deletions

diff --git a/scripts/mount-store b/scripts/mount-store
index 81fe438..0faf236 100755
--- a/scripts/mount-store
+++ b/scripts/mount-store
@@ -3,10 +3,16 @@
 if [ $# -lt 2 ]; then
 	echo "Bad call to $0." >&2
 	echo "Expected: $0 images <source>" >&2
-	echo "USERNAME and PASSWORD are expected environment variables for CIFS" >&2
+	echo "TM_USERNAME and TM_PASSWORD are expected environment variables for CIFS" >&2
+	echo "TM_MOUNT_OPTIONS can be supplied in both cases to override automatic guessing" >&2
 	exit 1
 fi
 
+USERNAME="$TM_USERNAME"
+PASSWORD="$TM_PASSWORD"
+MOUNT_OPTIONS="$TM_MOUNT_OPTIONS"
+unset TM_PASSWORD
+
 declare -rg CIFS_OPTS="/opt/openslx/cifs.opts"
 declare -rg NFS_OPTS="/opt/openslx/nfs.opts"
 
@@ -40,7 +46,7 @@ storage_test () {
 	chgrp images "${DEST}" 2>/dev/null
 	mkdir -p "${SUBDIR}"
 	if [ ! -d "${SUBDIR}" ]; then
-		echo "Error: Could not create $(basename "$SUBDIR")! Storage not writable!" >&2
+		echo "Error: Could not create directory $(basename "${SUBDIR}")! Storage not writable!" >&2
 		return 6
 	fi
 	echo "Applying group..."
@@ -68,25 +74,27 @@ TRIES=0
 while awk '{print $2}' "/proc/mounts" | grep -Fxq "${DEST}"; do
 	echo "Trying to unmount '$DEST'..."
 	if [ "$TRIES" -gt 5 ]; then
-		echo "Error: Cannot unmount '$DEST', giving up." >&2
-		exit "$RET"
-	elif [ "$TRIES" -gt 3 ]; then
-		umount -v -f "$DEST"
-	else
-		umount -v "$DEST"
-	fi
-	RET=$?
-	if [ "$RET" -ne "0" ]; then
 		cat >&2 <<-HEREDOC
 			Error: Cannot unmount '$DEST'!
 			Storage might be in use (running VM upload etc.)
 			Try stopping DMSD first
 
 			If the problem persists, try rebooting the server.
+
+			Possible troublemaker(s):
 		HEREDOC
-		exit "$RET"
+		lsof -n | grep "$DEST" >&2
+		exit 99 # marker that nothing changed
+	elif [ "$TRIES" -gt 3 ]; then
+		umount -v -f "$DEST"
+		RET=$?
+	else
+		umount -v "$DEST"
+		RET=$?
 	fi
-	TRIES=$(( $TRIES + 1 ))
+	[ "$RET" = 0 ] && break
+	sleep 1
+	TRIES=$(( TRIES + 1 ))
 done
 
 # Sanity checks: Destination exists?
@@ -120,66 +128,109 @@ fi
 
 # Mount!
 
-if grep -E -q '^[^/].+:.+' <<<$SOURCE; then
-	# seems to be NFS
-	for opt in vers=4 vers=3; do
-		echo " * Trying ${opt}..."
-		mount -v -t nfs -o rw,noatime,noexec,nodev,async,nolock,$opt,fg,ac,retry=0,timeo=200,sec=sys "$SOURCE" "$DEST"
-		RET=$?
-		[ "$RET" -ne "0" ] && continue
-		echo "Mount succeeded, checking write permissions...."
-		storage_test
-		RET=$?
-		[ "$RET" -eq "0" ] && break
-		umount -v "$DEST" || umount -v -f -l "$DEST"
+# exec_mount <type> <options> <source> <dest>
+exec_mount () {
+	local fstype="$1"
+	local mntopts="$2"
+	local SOURCE="$3"
+	local DEST="$4"
+	echo " * Trying ${fstype} with ${mntopts}..."
+	mount -v -t "$fstype" -o "$mntopts" "$SOURCE" "$DEST"
+	RET=$?
+	[ "$RET" -ne "0" ] && return "$RET"
+	echo "Mount succeeded, checking write permissions...."
+	storage_test
+	RET=$?
+	[ "$RET" -eq "0" ] && return 0
+	umount -v "$DEST" || umount -v -f -l "$DEST"
+	return "$RET"
+}
+
+remove_option () {
+	local opt
+	while [ $# -gt 0 ]; do
+		opt=$1
+		shift
+		[[ "$MOUNT_OPTIONS" =~ (^|,)$opt($|,|=) ]] || continue
+		MOUNT_OPTIONS=$( echo "$MOUNT_OPTIONS" | sed -r "s/(^|,)$opt(|=[^,]*)(,|$)/\\1/g;s/,$//" )
 	done
-elif grep -E -q '^//' <<<$SOURCE; then
-	# seems to be SMB
-	export USER="$USERNAME"
-	export PASSWD="$PASSWORD"
-	RET=999
-	OPTSTR=
-	if [ -f "$CIFS_OPTS" ]; then
-		OPTSTR=$(cat "$CIFS_OPTS")
-	fi
-	if [ -n "$OPTSTR" ]; then
-		echo " * Trying last successful mount options..."
-		if mount -v -t cifs -o "$OPTSTR" "$SOURCE" "$DEST"; then
-			echo "Mount succeeded, checking write permissions...."
-			storage_test
+}
+
+main () {
+	local RET=999
+	if grep -E -q '^[^/].+:.+' <<<$SOURCE; then
+		# seems to be NFS
+		if [ "$RET" != 0 ] && [ -n "$MOUNT_OPTIONS" ]; then
+			remove_option bg retry ro
+			MOUNT_OPTIONS="$MOUNT_OPTIONS,fg,retry=0,rw"
+			exec_mount "nfs" "$MOUNT_OPTIONS" "$SOURCE" "$DEST"
+			return $?
+		fi
+		OPTSTR=
+		if [ -f "$NFS_OPTS" ]; then
+			OPTSTR=$(cat "$NFS_OPTS")
+		fi
+		if [ "$RET" != 0 ] && [ -n "$OPTSTR" ]; then
+			echo " * Trying last successful mount options..."
+			exec_mount "nfs" "$OPTSTR" "$SOURCE" "$DEST"
 			RET=$?
-			if [ "$RET" -ne "0" ]; then
-				umount -v "$DEST" || umount -v -f -l "$DEST"
-			fi
 		fi
-	fi
-	if [ "$RET" -ne "0" ]; then
-		for vers in "" "3.0" "2.1" "1.0" "2.0"; do
-			[ -n "$vers" ] && vers=",vers=${vers}"
-			for sec in "" "ntlmssp" "ntlmv2" "ntlm"; do
-				[ -n "$sec" ] && sec=",sec=${sec}"
-				echo " * Trying ...${vers}${sec}..."
-				OPTSTR="rw,uid=0,gid=12345,forceuid,forcegid,nounix,file_mode=0664,dir_mode=0775$vers$sec"
-				mount -v -t cifs -o "$OPTSTR" "$SOURCE" "$DEST"
-				RET=$?
-				[ "$RET" -ne "0" ] && continue
-				echo "Mount succeeded, checking write permissions...."
-				storage_test
+		if [ "$RET" != 0 ]; then
+			for opt in "#" "vers=4" "vers=3"; do
+				mntopts="rw,noatime,noexec,nodev,async,nolock,fg,ac,retry=0,timeo=200,sec=sys"
+				[ "$opt" != "#" ] && mntopts="$mntopts,$opt"
+				exec_mount "nfs" "$mntopts" "$SOURCE" "$DEST"
 				RET=$?
-				[ "$RET" -eq "0" ] && break
-				umount -v "$DEST" || umount -v -f -l "$DEST"
+				[ "$RET" = 0 ] && break
+			done
+			if [ "$RET" = 0 ] && [ -n "$mntopts" ]; then
+				echo "$OPTSTR" > "$NFS_OPTS"
+			fi
+		fi
+	elif grep -E -q '^//' <<<$SOURCE; then
+		# seems to be SMB
+		export USER="$USERNAME"
+		export PASSWD="$PASSWORD"
+		if [ "$RET" != 0 ] && [ -n "$MOUNT_OPTIONS" ]; then
+			remove_option uid gid file_mode dir_mode umask
+			MOUNT_OPTIONS="$MOUNT_OPTIONS,uid=0,gid=12345,forceuid,forcegid,file_mode=0664,dir_mode=0775"
+			exec_mount "cifs" "$MOUNT_OPTIONS" "$SOURCE" "$DEST"
+			return $?
+		fi
+		OPTSTR=
+		if [ -f "$CIFS_OPTS" ]; then
+			OPTSTR=$(cat "$CIFS_OPTS")
+		fi
+		if [ "$RET" != 0 ] && [ -n "$OPTSTR" ]; then
+			echo " * Trying last successful mount options..."
+			exec_mount "cifs" "$OPTSTR" "$SOURCE" "$DEST"
+			RET=$?
+		fi
+		if [ "$RET" != 0 ]; then
+			for vers in "" "3.0" "2.1" "2.0" "1.0"; do
+				[ -n "$vers" ] && vers=",vers=${vers}"
+				for sec in "" "ntlmssp" "ntlmv2" "ntlm"; do
+					[ -n "$sec" ] && sec=",sec=${sec}"
+					OPTSTR="rw,uid=0,gid=12345,forceuid,forcegid,nounix,file_mode=0664,dir_mode=0775$vers$sec"
+					exec_mount "cifs" "$OPTSTR" "$SOURCE" "$DEST"
+					RET=$?
+					[ "$RET" = 0 ] && break 2
+				done
 			done
-			[ "$RET" -eq "0" ] && break
-		done
-		if [ "$RET" -eq "0" ] && [ -n "$OPTSTR" ]; then
-			echo "$OPTSTR" > "$CIFS_OPTS"
+			if [ "$RET" = 0 ] && [ -n "$OPTSTR" ]; then
+				echo "$OPTSTR" > "$CIFS_OPTS"
+			fi
 		fi
+		unset USER PASSWD
+	else
+		echo "Unknown mount type: $SOURCE"
+		RET=1
 	fi
-	unset USER PASSWD
-else
-	echo "Unknown mount type: $SOURCE"
-	exit 1
-fi
+	return "$RET"
+}
+
+main
+RET=$?
 
 echo ""
 
@@ -190,5 +241,5 @@ if [ "$RET" = "0" ]; then
 	systemctl --no-block start dnbd3-server.service
 fi
 
-exit $RET
+exit "$RET"