mirror of
git://sourceware.org/git/lvm2.git
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451 lines
9.6 KiB
Bash
Executable File
451 lines
9.6 KiB
Bash
Executable File
#!/bin/bash
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#
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# Copyright (C) 2022 Red Hat, Inc. All rights reserved.
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#
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# This file is part of LVM2.
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#
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# This copyrighted material is made available to anyone wishing to use,
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# modify, copy, or redistribute it subject to the terms and conditions
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# of the GNU General Public License v.2.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software Foundation,
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# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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errorexit() {
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echo "$1" >&2
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exit 1
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}
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logmsg() {
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echo "$1"
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logger "${SCRIPTNAME}: $1"
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}
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# Set to 1 while the fs is temporarily mounted on $TMPDIR
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TMP_MOUNT_DONE=0
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# Set to 1 if the fs resize command fails
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RESIZEFS_FAILED=0
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fsextend() {
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if [ "$DO_UNMOUNT" -eq 1 ]; then
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logmsg "unmount ${MOUNTDIR}"
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if umount "$MOUNTDIR"; then
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logmsg "unmount done"
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else
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logmsg "unmount failed"
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exit 1
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fi
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fi
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if [ "$DO_FSCK" -eq 1 ]; then
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logmsg "e2fsck ${DEVPATH}"
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if e2fsck -f -p "$DEVPATH"; then
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logmsg "e2fsck done"
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else
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logmsg "e2fsck failed"
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exit 1
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fi
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fi
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if [ "$DO_CRYPTRESIZE" -eq 1 ]; then
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logmsg "cryptsetup resize ${DEVPATH}"
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if cryptsetup resize "$DEVPATH"; then
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logmsg "cryptsetup done"
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else
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logmsg "cryptsetup failed"
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exit 1
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fi
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fi
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if [ "$DO_MOUNT" -eq 1 ]; then
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logmsg "mount ${DEVPATH} ${TMPDIR}"
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if mount -t "$FSTYPE" "$DEVPATH" "$TMPDIR"; then
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logmsg "mount done"
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TMP_MOUNT_DONE=1
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else
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logmsg "mount failed"
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exit 1
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fi
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fi
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if [[ "$FSTYPE" == "ext"* ]]; then
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logmsg "resize2fs ${DEVPATH}"
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if resize2fs "$DEVPATH"; then
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logmsg "resize2fs done"
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else
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logmsg "resize2fs failed"
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RESIZEFS_FAILED=1
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fi
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elif [[ "$FSTYPE" == "xfs" ]]; then
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logmsg "xfs_growfs ${DEVPATH}"
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if xfs_growfs "$DEVPATH"; then
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logmsg "xfs_growfs done"
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else
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logmsg "xfs_growfs failed"
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RESIZEFS_FAILED=1
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fi
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fi
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# If the fs was temporarily mounted, now unmount it.
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if [ $TMP_MOUNT_DONE -eq 1 ]; then
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logmsg "cleanup unmount ${TMPDIR}"
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if umount "$TMPDIR"; then
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logmsg "cleanup unmount done"
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TMP_MOUNT_DONE=0
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rmdir "$TMPDIR"
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else
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logmsg "cleanup unmount failed"
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exit 1
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fi
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fi
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# If the fs was temporarily unmounted, now remount it.
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# Not considered a command failure if this fails.
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if [[ $DO_UNMOUNT -eq 1 && $REMOUNT -eq 1 ]]; then
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logmsg "remount ${DEVPATH} ${MOUNTDIR}"
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if mount -t "$FSTYPE" "$DEVPATH" "$MOUNTDIR"; then
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logmsg "remount done"
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else
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logmsg "remount failed"
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fi
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fi
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if [ $RESIZEFS_FAILED -eq 1 ]; then
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logmsg "File system extend failed."
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exit 1
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fi
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exit 0
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}
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fsreduce() {
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if [ "$DO_UNMOUNT" -eq 1 ]; then
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logmsg "unmount ${MOUNTDIR}"
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if umount "$MOUNTDIR"; then
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logmsg "unmount done"
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else
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logmsg "unmount failed"
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exit 1
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fi
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fi
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if [ "$DO_FSCK" -eq 1 ]; then
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logmsg "e2fsck ${DEVPATH}"
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if e2fsck -f -p "$DEVPATH"; then
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logmsg "e2fsck done"
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else
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logmsg "e2fsck failed"
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exit 1
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fi
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fi
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if [ "$DO_MOUNT" -eq 1 ]; then
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logmsg "mount ${DEVPATH} ${TMPDIR}"
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if mount -t "$FSTYPE" "$DEVPATH" "$TMPDIR"; then
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logmsg "mount done"
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TMP_MOUNT_DONE=1
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else
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logmsg "mount failed"
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exit 1
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fi
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fi
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if [[ "$FSTYPE" == "ext"* ]]; then
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NEWSIZEKB=$(( NEWSIZEBYTES / 1024 ))
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logmsg "resize2fs ${DEVPATH} ${NEWSIZEKB}k"
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if resize2fs "$DEVPATH" "$NEWSIZEKB"k; then
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logmsg "resize2fs done"
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else
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logmsg "resize2fs failed"
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# will exit after cleanup unmount
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RESIZEFS_FAILED=1
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fi
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fi
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# If the fs was temporarily mounted, now unmount it.
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if [ $TMP_MOUNT_DONE -eq 1 ]; then
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logmsg "cleanup unmount ${TMPDIR}"
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if umount "$TMPDIR"; then
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logmsg "cleanup unmount done"
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TMP_MOUNT_DONE=0
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rmdir "$TMPDIR"
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else
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logmsg "cleanup unmount failed"
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exit 1
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fi
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fi
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if [ $RESIZEFS_FAILED -eq 1 ]; then
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logmsg "File system reduce failed."
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exit 1
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fi
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if [ "$DO_CRYPTRESIZE" -eq 1 ]; then
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NEWSIZESECTORS=$(( NEWSIZEBYTES / 512 ))
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logmsg "cryptsetup resize ${NEWSIZESECTORS} sectors ${DEVPATH}"
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if cryptsetup resize --size "$NEWSIZESECTORS" "$DEVPATH"; then
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logmsg "cryptsetup done"
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else
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logmsg "cryptsetup failed"
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exit 1
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fi
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fi
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# If the fs was temporarily unmounted, now remount it.
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# Not considered a command failure if this fails.
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if [[ $DO_UNMOUNT -eq 1 && $REMOUNT -eq 1 ]]; then
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logmsg "remount ${DEVPATH} ${MOUNTDIR}"
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if mount -t "$FSTYPE" "$DEVPATH" "$MOUNTDIR"; then
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logmsg "remount done"
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else
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logmsg "remount failed"
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fi
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fi
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exit 0
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}
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cryptresize() {
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NEWSIZESECTORS=$(( NEWSIZEBYTES / 512 ))
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logmsg "cryptsetup resize ${NEWSIZESECTORS} sectors ${DEVPATH}"
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if cryptsetup resize --size "$NEWSIZESECTORS" "$DEVPATH"; then
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logmsg "cryptsetup done"
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else
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logmsg "cryptsetup failed"
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exit 1
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fi
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exit 0
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}
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usage() {
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echo "${SCRIPTNAME}: helper script called by lvresize to resize file systems."
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echo ""
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echo "${SCRIPTNAME} --fsextend --fstype name --lvpath path"
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echo " [ --mountdir path ]"
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echo " [ --mount ]"
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echo " [ --unmount ]"
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echo " [ --remount ]"
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echo " [ --fsck ]"
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echo " [ --cryptresize ]"
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echo " [ --cryptpath path ]"
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echo ""
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echo "${SCRIPTNAME} --fsreduce --fstype name --lvpath path"
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echo " [ --newsizebytes num ]"
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echo " [ --mountdir path ]"
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echo " [ --mount ]"
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echo " [ --unmount ]"
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echo " [ --remount ]"
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echo " [ --fsck ]"
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echo " [ --cryptresize ]"
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echo " [ --cryptpath path ]"
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echo ""
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echo "${SCRIPTNAME} --cryptresize --cryptpath path --newsizebytes num"
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echo ""
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echo "Options:"
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echo " --fsextend"
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echo " Extend the file system."
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echo " --fsreduce"
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echo " Reduce the file system."
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echo " --fstype name"
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echo " The type of file system (ext*, xfs)."
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echo " --lvpath path"
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echo " The path to the LV being resized."
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echo " --mountdir path"
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echo " The file system is currently mounted here."
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echo " --mount"
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echo " Mount the file system on a temporary directory before resizing."
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echo " --unmount"
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echo " Unmount the file system before resizing."
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echo " --remount"
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echo " Remount the file system after resizing if unmounted."
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echo " --fsck"
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echo " Run fsck on the file system before resizing (only with ext*)."
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echo " --newsizebytes num"
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echo " The new size of the file system."
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echo " --cryptresize"
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echo " Resize the crypt device between the LV and file system."
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echo " --cryptpath path"
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echo " The path to the crypt device."
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echo ""
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}
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#
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# BEGIN SCRIPT
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#
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PATH="/sbin:/usr/sbin:/bin:/usr/sbin:$PATH"
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SCRIPTNAME=$(basename "$0")
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# These are the only commands that this script will run.
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# Each is enabled (1) by the corresponding command options:
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# --fsextend, --fsreduce, --cryptresize, --mount, --unmount, --fsck
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DO_FSEXTEND=0
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DO_FSREDUCE=0
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DO_CRYPTRESIZE=0
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DO_MOUNT=0
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DO_UNMOUNT=0
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DO_FSCK=0
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# --remount: attempt to remount the fs if it was originally
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# mounted and the script unmounted it.
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REMOUNT=0
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if [ "$UID" != 0 ] && [ "$EUID" != 0 ]; then
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errorexit "${SCRIPTNAME} must be run as root."
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fi
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GETOPT="getopt"
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OPTIONS=$("$GETOPT" -o h -l help,fsextend,fsreduce,cryptresize,mount,unmount,remount,fsck,fstype:,lvpath:,newsizebytes:,mountdir:,cryptpath: -n "${SCRIPTNAME}" -- "$@")
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eval set -- "$OPTIONS"
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while true
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do
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case $1 in
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--fsextend)
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DO_FSEXTEND=1
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shift
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;;
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--fsreduce)
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DO_FSREDUCE=1
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shift
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;;
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--cryptresize)
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DO_CRYPTRESIZE=1
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shift
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;;
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--mount)
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DO_MOUNT=1
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shift
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;;
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--unmount)
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DO_UNMOUNT=1
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shift
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;;
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--fsck)
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DO_FSCK=1
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shift
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;;
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--remount)
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REMOUNT=1
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shift
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;;
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--fstype)
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FSTYPE=$2;
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shift; shift
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;;
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--lvpath)
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LVPATH=$2;
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shift; shift
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;;
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--newsizebytes)
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NEWSIZEBYTES=$2;
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shift; shift
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;;
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--mountdir)
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MOUNTDIR=$2;
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shift; shift
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;;
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--cryptpath)
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CRYPTPATH=$2;
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shift; shift
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;;
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-h|--help)
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usage
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shift
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exit 0
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;;
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--)
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shift
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break
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;;
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*)
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errorexit "Unknown option \"$1\."
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exit 1
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;;
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esac
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done
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#
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# Input arg checking
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#
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# There are three top level commands: --fsextend, --fsreduce, --cryptresize.
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if [[ "$DO_FSEXTEND" -eq 0 && "$DO_FSREDUCE" -eq 0 && "$DO_CRYPTRESIZE" -eq 0 ]]; then
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errorexit "Missing --fsextend|--fsreduce|--cryptresize."
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fi
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if [[ "$DO_FSEXTEND" -eq 1 || "$DO_FSREDUCE" -eq 1 ]]; then
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case "$FSTYPE" in
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ext[234]) ;;
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"xfs") ;;
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*) errorexit "Cannot resize --fstype \"$FSTYPE\"."
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esac
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if [ -z "$LVPATH" ]; then
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errorexit "Missing required --lvpath."
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fi
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fi
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if [[ "$DO_CRYPTRESIZE" -eq 1 && -z "$CRYPTPATH" ]]; then
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errorexit "Missing required --cryptpath for --cryptresize."
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fi
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if [ "$DO_CRYPTRESIZE" -eq 1 ]; then
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DEVPATH=$CRYPTPATH
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else
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DEVPATH=$LVPATH
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fi
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if [ -z "$DEVPATH" ]; then
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errorexit "Missing path to device."
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fi
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if [ ! -e "$DEVPATH" ]; then
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errorexit "Device does not exist \"$DEVPATH\"."
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fi
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if [[ "$DO_UNMOUNT" -eq 1 && -z "$MOUNTDIR" ]]; then
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errorexit "Missing required --mountdir for --unmount."
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fi
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if [[ "$DO_FSREDUCE" -eq 1 && "$FSTYPE" == "xfs" ]]; then
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errorexit "Cannot reduce xfs."
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fi
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if [[ "$DO_FSCK" -eq 1 && "$FSTYPE" == "xfs" ]]; then
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errorexit "Cannot use --fsck with xfs."
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fi
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if [ "$DO_MOUNT" -eq 1 ]; then
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TMPDIR=$(mktemp --suffix _lvresize_$$ -d -p /tmp)
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if [ ! -e "$TMPDIR" ]; then
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errorexit "Failed to create temp dir."
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fi
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# In case the script terminates without doing cleanup
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function finish {
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if [ "$TMP_MOUNT_DONE" -eq 1 ]; then
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logmsg "exit unmount ${TMPDIR}"
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umount "$TMPDIR"
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rmdir "$TMPDIR"
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fi
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}
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trap finish EXIT
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fi
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#
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# Main program function:
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# - the two main functions are fsextend and fsreduce.
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# - one special case function is cryptresize.
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#
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if [ "$DO_FSEXTEND" -eq 1 ]; then
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fsextend
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elif [ "$DO_FSREDUCE" -eq 1 ]; then
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fsreduce
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elif [ "$DO_CRYPTRESIZE" -eq 1 ]; then
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cryptresize
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fi
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