From 3ee2a9da6251179c47ff6c2dc5c969e79f31e9e0 Mon Sep 17 00:00:00 2001
From: Vojtech Trefny <vtrefny@redhat.com>
Date: Tue, 4 Apr 2023 13:31:40 +0200
Subject: [PATCH] Add support for filesystem online resize
---
blivet/devices/lvm.py | 10 ++++++----
blivet/devices/partition.py | 11 ++++++-----
blivet/flags.py | 3 +++
blivet/formats/fs.py | 32 ++++++++++++++++++++++++++++----
blivet/formats/fslib.py | 7 +++++++
5 files changed, 50 insertions(+), 13 deletions(-)
diff --git a/blivet/devices/lvm.py b/blivet/devices/lvm.py
index 434c359f..04e03e82 100644
--- a/blivet/devices/lvm.py
+++ b/blivet/devices/lvm.py
@@ -42,6 +42,7 @@ from .. import errors
from .. import util
from ..storage_log import log_method_call
from .. import udev
+from ..flags import flags
from ..size import Size, KiB, MiB, ROUND_UP, ROUND_DOWN
from ..static_data.lvm_info import lvs_info
from ..tasks import availability
@@ -2719,10 +2720,11 @@ class LVMLogicalVolumeDevice(LVMLogicalVolumeBase, LVMInternalLogicalVolumeMixin
# Setup VG parents (in case they are dmraid partitions for example)
self.vg.setup_parents(orig=True)
- if self.original_format.exists:
- self.original_format.teardown()
- if self.format.exists:
- self.format.teardown()
+ if not flags.allow_online_fs_resize:
+ if self.original_format.exists:
+ self.original_format.teardown()
+ if self.format.exists:
+ self.format.teardown()
udev.settle()
blockdev.lvm.lvresize(self.vg.name, self._name, self.size)
diff --git a/blivet/devices/partition.py b/blivet/devices/partition.py
index e8bd2b7b..5bf3c713 100644
--- a/blivet/devices/partition.py
+++ b/blivet/devices/partition.py
@@ -794,11 +794,12 @@ class PartitionDevice(StorageDevice):
if not self.exists:
raise errors.DeviceError("device has not been created")
- # don't teardown when resizing luks
- if self.format.type == "luks" and self.children:
- self.children[0].format.teardown()
- else:
- self.teardown()
+ if not flags.allow_online_fs_resize:
+ # don't teardown when resizing luks
+ if self.format.type == "luks" and self.children:
+ self.children[0].format.teardown()
+ else:
+ self.teardown()
if not self.sysfs_path:
return
diff --git a/blivet/flags.py b/blivet/flags.py
index f0034070..716f0df4 100644
--- a/blivet/flags.py
+++ b/blivet/flags.py
@@ -95,6 +95,9 @@ class Flags(object):
# https://uapi-group.org/specifications/specs/discoverable_partitions_specification/
self.gpt_discoverable_partitions = False
+ # Allow online filesystem resizes
+ self.allow_online_fs_resize = False
+
def get_boot_cmdline(self):
with open("/proc/cmdline") as f:
buf = f.read().strip()
diff --git a/blivet/formats/fs.py b/blivet/formats/fs.py
index 8df881b8..acc1f9cb 100644
--- a/blivet/formats/fs.py
+++ b/blivet/formats/fs.py
@@ -56,7 +56,7 @@ from ..i18n import N_
from .. import udev
from ..mounts import mounts_cache
-from .fslib import kernel_filesystems
+from .fslib import kernel_filesystems, FSResize
import logging
log = logging.getLogger("blivet")
@@ -88,6 +88,9 @@ class FS(DeviceFormat):
# value is already unpredictable and can change in the future...
_metadata_size_factor = 1.0
+ # support for resize: grow/shrink, online/offline
+ _resize_support = 0
+
config_actions_map = {"label": "write_label"}
def __init__(self, **kwargs):
@@ -436,12 +439,27 @@ class FS(DeviceFormat):
self.write_uuid()
def _pre_resize(self):
- # file systems need a check before being resized
- self.do_check()
+ if self.status:
+ if flags.allow_online_fs_resize:
+ if self.target_size > self.size and not self._resize_support & FSResize.ONLINE_GROW:
+ raise FSError("This filesystem doesn't support online growing")
+ if self.target_size < self.size and not self._resize_support & FSResize.ONLINE_SHRINK:
+ raise FSError("This filesystem doesn't support online shrinking")
+ else:
+ raise FSError("Resizing of mounted filesystems is disabled")
+
+ if self.status:
+ # fsck tools in general don't allow checks on mounted filesystems
+ log.debug("Filesystem on %s is mounted, not checking", self.device)
+ else:
+ # file systems need a check before being resized
+ self.do_check()
+
super(FS, self)._pre_resize()
def _post_resize(self):
- self.do_check()
+ if not self.status:
+ self.do_check()
super(FS, self)._post_resize()
def do_check(self):
@@ -838,6 +856,7 @@ class Ext2FS(FS):
_formattable = True
_supported = True
_resizable = True
+ _resize_support = FSResize.ONLINE_GROW | FSResize.OFFLINE_GROW | FSResize.OFFLINE_SHRINK
_linux_native = True
_max_size = Size("8 TiB")
_dump = True
@@ -1097,6 +1116,7 @@ class XFS(FS):
_linux_native = True
_supported = True
_resizable = True
+ _resize_support = FSResize.ONLINE_GROW | FSResize.OFFLINE_GROW
_packages = ["xfsprogs"]
_fsck_class = fsck.XFSCK
_info_class = fsinfo.XFSInfo
@@ -1247,6 +1267,7 @@ class NTFS(FS):
_labelfs = fslabeling.NTFSLabeling()
_uuidfs = fsuuid.NTFSUUID()
_resizable = True
+ _resize_support = FSResize.OFFLINE_GROW | FSResize.OFFLINE_SHRINK
_formattable = True
_supported = True
_min_size = Size("1 MiB")
@@ -1502,6 +1523,9 @@ class TmpFS(NoDevFS):
# same, nothing actually needs to be set
pass
+ def _pre_resize(self):
+ self.do_check()
+
def do_resize(self):
# Override superclass method to record whether mount options
# should include an explicit size specification.
diff --git a/blivet/formats/fslib.py b/blivet/formats/fslib.py
index ea93b1fd..8722e942 100644
--- a/blivet/formats/fslib.py
+++ b/blivet/formats/fslib.py
@@ -36,3 +36,10 @@ def update_kernel_filesystems():
update_kernel_filesystems()
+
+
+class FSResize():
+ OFFLINE_SHRINK = 1 << 1
+ OFFLINE_GROW = 1 << 2
+ ONLINE_SHRINK = 1 << 3
+ ONLINE_GROW = 1 << 4
--
2.40.1