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lvm2/lib/format_text/format-text.h
Dave Wysochanski 09e0f43ba0 Allow raw_read_mda_header to be called from text_label.c.
We'd like to pass in mda_header to vgname_from_mda().  In order to
do this, we need to call raw_read_mda_header() from text_label.c,
_text_read(), which gets called from the label_read() path, and
peers into the metadata and update vginfo cache.  We should check
the disable bit here, and if set, not peer into the vg metadata,
thus reducing the I/O to disk.

In the process, move vgname_from_mda() to layout.h, since the fn
only gets called from format_text code, and we need the mda_header
definition from the private layout.h.

Signed-off-by: Dave Wysochanski <dwysocha@redhat.com>
2010-06-28 20:31:01 +00:00

63 lines
2.1 KiB
C

/*
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
*
* This file is part of LVM2.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU Lesser General Public License v.2.1.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef _LVM_FORMAT_TEXT_H
#define _LVM_FORMAT_TEXT_H
#include "lvm-types.h"
#include "metadata.h"
#define FMT_TEXT_NAME "lvm2"
#define FMT_TEXT_ALIAS "text"
#define FMT_TEXT_ORPHAN_VG_NAME ORPHAN_VG_NAME(FMT_TEXT_NAME)
/*
* Archives a vg config. 'retain_days' is the minimum number of
* days that an archive file must be held for. 'min_archives' is
* the minimum number of archives required to be kept for each
* volume group.
*/
int archive_vg(struct volume_group *vg,
const char *dir,
const char *desc, uint32_t retain_days, uint32_t min_archive);
/*
* Displays a list of vg backups in a particular archive directory.
*/
int archive_list(struct cmd_context *cmd, const char *dir, const char *vgname);
int archive_list_file(struct cmd_context *cmd, const char *file);
int backup_list(struct cmd_context *cmd, const char *dir, const char *vgname);
/*
* The text format can read and write a volume_group to a file.
*/
struct format_type *create_text_format(struct cmd_context *cmd);
void *create_text_context(struct cmd_context *cmd, const char *path,
const char *desc);
struct labeller *text_labeller_create(const struct format_type *fmt);
int pvhdr_read(struct device *dev, char *buf);
int add_da(struct dm_pool *mem, struct dm_list *das,
uint64_t start, uint64_t size);
void del_das(struct dm_list *das);
int add_mda(const struct format_type *fmt, struct dm_pool *mem, struct dm_list *mdas,
struct device *dev, uint64_t start, uint64_t size);
void del_mdas(struct dm_list *mdas);
#endif