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When there are missing PVs in a volume group, most operations that alter the LVM metadata are disallowed. It turns out that 'vgimport' is one of those disallowed operations. This is bad because it creates a circular dependency. 'vgimport' will complain that the VG is inconsistent and that 'vgreduce --removemissing' must be run. However, 'vgreduce' cannot be run because it has not been imported. Therefore, 'vgimport' must be one of the operations allowed to change the metadata when PVs are missing. The '--force' option is the way to make 'vgimport' happen in spite of the missing PVs.
93 lines
2.4 KiB
C
93 lines
2.4 KiB
C
/*
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* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
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* Copyright (C) 2004-2009 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "tools.h"
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static int vgimport_single(struct cmd_context *cmd __attribute__((unused)),
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const char *vg_name,
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struct volume_group *vg,
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void *handle __attribute__((unused)))
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{
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struct pv_list *pvl;
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struct physical_volume *pv;
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if (!vg_is_exported(vg)) {
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log_error("Volume group \"%s\" is not exported", vg_name);
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goto bad;
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}
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if (vg_status(vg) & PARTIAL_VG) {
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log_error("Volume group \"%s\" is partially missing", vg_name);
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goto bad;
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}
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if (!archive(vg))
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goto_bad;
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vg->status &= ~EXPORTED_VG;
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dm_list_iterate_items(pvl, &vg->pvs) {
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pv = pvl->pv;
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pv->status &= ~EXPORTED_VG;
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}
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if (!vg_write(vg) || !vg_commit(vg))
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goto_bad;
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backup(vg);
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log_print_unless_silent("Volume group \"%s\" successfully imported", vg->name);
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return ECMD_PROCESSED;
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bad:
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return ECMD_FAILED;
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}
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int vgimport(struct cmd_context *cmd, int argc, char **argv)
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{
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if (!argc && !arg_count(cmd, all_ARG)) {
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log_error("Please supply volume groups or use -a for all.");
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return ECMD_FAILED;
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}
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if (argc && arg_count(cmd, all_ARG)) {
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log_error("No arguments permitted when using -a for all.");
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return ECMD_FAILED;
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}
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if (arg_count(cmd, force_ARG)) {
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/*
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* The volume group cannot be repaired unless it is first
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* imported. If we don't allow the user a way to import the
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* VG while it is 'partial', then we will have created a
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* circular dependency.
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*
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* The reason we don't just simply set 'handles_missing_pvs'
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* by default is that we want to guard against the case
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* where the user simply forgot to move one or more disks in
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* the VG before running 'vgimport'.
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*/
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log_print("'--force' supplied. Volume groups with missing PVs"
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" will be imported.");
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cmd->handles_missing_pvs = 1;
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}
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return process_each_vg(cmd, argc, argv,
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READ_FOR_UPDATE | READ_ALLOW_EXPORTED,
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NULL,
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&vgimport_single);
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}
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