mirror of
git://sourceware.org/git/lvm2.git
synced 2024-12-22 17:35:59 +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.
63 lines
1.4 KiB
C
63 lines
1.4 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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#include "tools.h"
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#include <stdio.h>
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static int _backup_to_file(const char *file, struct volume_group *vg)
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{
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int r;
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struct format_instance *tf;
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void *context;
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if (!(context = create_text_context(vg->cmd->fmtt, file,
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vg->cmd->cmd_line)) ||
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!(tf = vg->cmd->fmtt->ops->create_instance(vg->cmd->fmtt, NULL,
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context))) {
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log_error("Couldn't create backup object.");
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return 0;
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}
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if (!(r = tf->fmt->ops->vg_write(tf, vg, context)) ||
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!(r = tf->fmt->ops->vg_commit(tf, vg, context)))
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stack;
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tf->fmt->ops->destroy_instance(tf);
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return r;
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}
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static int vg_backup_single(struct cmd_context *cmd, const char *vg_name)
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{
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struct volume_group *vg;
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log_verbose("Checking for volume group \"%s\"", vg_name);
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if (!(vg = vg_read(cmd, vg_name))) {
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log_error("Volume group \"%s\" not found", vg_name);
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return ECMD_FAILED;
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}
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if (arg_count(cmd, file_ARG)) {
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_backup_to_file(arg_value(cmd, file_ARG), vg);
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} else {
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/* just use the normal backup code */
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backup_enable(1); /* force a backup */
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if (!backup(vg)) {
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stack;
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return ECMD_FAILED;
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}
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}
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log_print("Volume group \"%s\" successfully backed up.", vg_name);
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return 0;
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}
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int vgcfgbackup(struct cmd_context *cmd, int argc, char **argv)
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{
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return process_each_vg(cmd, argc, argv, LCK_VG_READ, &vg_backup_single);
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}
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