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The new option "--fs String" for lvresize/lvreduce/lvextend controls the handling of file systems before/after resizing the LV. --resizefs is the same as --fs resize. The new option "--fsmode String" can be used to control mounting and unmounting of the fs during resizing. Possible --fs values: checksize Only applies to reducing size; does nothing for extend. Check the fs size and reduce the LV if the fs is not using the affected space, i.e. the fs does not need to be shrunk. Fail the command without reducing the fs or LV if the fs is using the affected space. resize Resize the fs using the fs-specific resize command. This may include mounting, unmounting, or running fsck. See --fsmode to control mounting behavior, and --nofsck to disable fsck. resize_fsadm Use the old method of calling fsadm to handle the fs (deprecated.) Warning: this option does not prevent lvreduce from destroying file systems that are unmounted (or mounted if prompts are skipped.) ignore Resize the LV without checking for or handling a file system. Warning: using ignore when reducing the LV size may destroy the file system. Possible --fsmode values: manage Mount or unmount the fs as needed to resize the fs, and attempt to restore the original mount state at the end. nochange Do not mount or unmount the fs. If mounting or unmounting is required to resize the fs, then do not resize the fs or the LV and fail the command. offline Unmount the fs if it is mounted, and resize the fs while it is unmounted. If mounting is required to resize the fs, then do not resize the fs or the LV and fail the command. Notes on lvreduce: When no --fs or --resizefs option is specified: . lvextend default behavior is fs ignore. . lvreduce default behavior is fs checksize (includes activating the LV.) With the exception of --fs resize_fsadm|ignore, lvreduce requires the recent libblkid fields FSLASTBLOCK and FSBLOCKSIZE. FSLASTBLOCK*FSBLOCKSIZE is the last byte used by the fs on the LV, which determines if reducing the fs is necessary.
113 lines
4.0 KiB
C
113 lines
4.0 KiB
C
/*
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* Copyright (C) 2013 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 Lesser General Public License v.2.1.
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*
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* You should have received a copy of the GNU Lesser 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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*/
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#ifndef _LVM_DEV_TYPE_H
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#define _LVM_DEV_TYPE_H
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#include "lib/device/device.h"
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#include "lib/display/display.h"
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#include "lib/label/label.h"
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#include "lib/device/filesystem.h"
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#define NUMBER_OF_MAJORS 4096
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#ifdef __linux__
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# include "libdm/misc/kdev_t.h"
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#else
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# define MAJOR(x) major((x))
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# define MINOR(x) minor((x))
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# define MKDEV(x,y) makedev((x),(y))
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#endif
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#define PARTITION_SCSI_DEVICE (1 << 0)
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struct dev_type_def {
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int max_partitions; /* 0 means LVM won't use this major number. */
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int flags;
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};
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struct dev_types {
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int md_major;
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int blkext_major;
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int drbd_major;
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int device_mapper_major;
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int emcpower_major;
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int vxdmp_major;
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int power2_major;
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int dasd_major;
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int loop_major;
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struct dev_type_def dev_type_array[NUMBER_OF_MAJORS];
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};
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struct dev_types *create_dev_types(const char *proc_dir, const struct dm_config_node *cn);
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/* Subsystems */
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int dev_subsystem_part_major(struct dev_types *dt, struct device *dev);
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const char *dev_subsystem_name(struct dev_types *dt, struct device *dev);
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int major_is_scsi_device(struct dev_types *dt, int major);
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/* Signature/superblock recognition with position returned where found. */
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int dev_is_md_component(struct cmd_context *cmd, struct device *dev, uint64_t *sb, int full);
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int dev_is_mpath_component(struct cmd_context *cmd, struct device *dev, dev_t *mpath_devno);
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int dev_is_swap(struct cmd_context *cmd, struct device *dev, uint64_t *signature, int full);
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int dev_is_luks(struct cmd_context *cmd, struct device *dev, uint64_t *signature, int full);
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int dasd_is_cdl_formatted(struct device *dev);
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const char *dev_mpath_component_wwid(struct cmd_context *cmd, struct device *dev);
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int dev_is_lvm1(struct device *dev, char *buf, int buflen);
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int dev_is_pool(struct device *dev, char *buf, int buflen);
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/* Signature wiping. */
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#define TYPE_LVM1_MEMBER 0x001
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#define TYPE_LVM2_MEMBER 0x002
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#define TYPE_DM_SNAPSHOT_COW 0x004
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int wipe_known_signatures(struct cmd_context *cmd, struct device *dev, const char *name,
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uint32_t types_to_exclude, uint32_t types_no_prompt,
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int yes, force_t force, int *wiped);
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/* Type-specific device properties */
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unsigned long dev_md_stripe_width(struct dev_types *dt, struct device *dev);
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int dev_is_md_with_end_superblock(struct dev_types *dt, struct device *dev);
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/* Partitioning */
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int major_max_partitions(struct dev_types *dt, int major);
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int dev_is_partitioned(struct cmd_context *cmd, struct device *dev);
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int dev_get_primary_dev(struct dev_types *dt, struct device *dev, dev_t *result);
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int dev_get_partition_number(struct device *dev, int *num);
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/* Various device properties */
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unsigned long dev_alignment_offset(struct dev_types *dt, struct device *dev);
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unsigned long dev_minimum_io_size(struct dev_types *dt, struct device *dev);
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unsigned long dev_optimal_io_size(struct dev_types *dt, struct device *dev);
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unsigned long dev_discard_max_bytes(struct dev_types *dt, struct device *dev);
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unsigned long dev_discard_granularity(struct dev_types *dt, struct device *dev);
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int dev_is_rotational(struct dev_types *dt, struct device *dev);
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int dev_is_pmem(struct dev_types *dt, struct device *dev);
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int dev_is_nvme(struct dev_types *dt, struct device *dev);
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int dev_is_lv(struct device *dev);
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#define FSTYPE_MAX 16
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int fs_block_size_and_type(const char *pathname, uint32_t *fs_block_size_bytes, char *fstype, int *nofs);
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int fs_get_blkid(const char *pathname, struct fs_info *fsi);
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int dev_is_used_by_active_lv(struct cmd_context *cmd, struct device *dev, int *used_by_lv_count,
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char **used_by_dm_name, char **used_by_vg_uuid, char **used_by_lv_uuid);
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#endif
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