mirror of
git://sourceware.org/git/lvm2.git
synced 2025-01-09 01:18:39 +03:00
25b733809a
Lots of changes/very little testing so far => there'll be bugs!
Use 'vgcreate -M text' to create a volume group with its metadata stored
in text files. Text format metadata changes should be reasonably atomic,
with a (basic) automatic recovery mechanism if the system crashes while a
change is in progress.
Add a metadata section to lvm.conf to specify multiple directories if
you want (recommended) to keep multiple copies of the metadata (eg on
different filesystems).
e.g. metadata {
dirs = ["/etc/lvm/metadata1","/usr/local/lvm/metadata2"]
}
Plenty of refinements still in the pipeline.
62 lines
1.3 KiB
C
62 lines
1.3 KiB
C
/*
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* Copyright (C) 2001 Sistina Software (UK) Limited.
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*
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* This file is released under the GPL.
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*/
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#ifndef _LVM_DEVICE_H
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#define _LVM_DEVICE_H
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#include "lvm-types.h"
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#include "list.h"
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#define DEV_ACCESSED_W 0x00000001 /* Device written to? */
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/*
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* All devices in LVM will be represented by one of these.
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* pointer comparisons are valid.
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*/
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struct device {
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struct list aliases; /* struct str_list from lvm-types.h */
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dev_t dev;
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/* private */
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int fd;
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uint32_t flags;
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};
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struct device_list {
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struct list list;
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struct device *dev;
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};
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/*
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* All io should use these routines.
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*/
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int dev_get_size(struct device *dev, uint64_t *size);
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int dev_get_sectsize(struct device *dev, uint32_t *size);
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int dev_open(struct device *dev, int flags);
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int dev_close(struct device *dev);
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int64_t dev_read(struct device *dev,
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uint64_t offset, int64_t len, void *buffer);
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int64_t dev_write(struct device *dev,
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uint64_t offset, int64_t len, void *buffer);
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int dev_zero(struct device *dev, uint64_t offset, int64_t len);
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static inline const char *dev_name(struct device *dev) {
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return list_item(dev->aliases.n, struct str_list)->str;
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}
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/* Return a valid device name from the alias list; NULL otherwise */
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const char *dev_name_confirmed(struct device *dev);
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static inline int is_lvm_partition(const char *name) {
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return 1;
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}
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#endif
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