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d6ffc99052
vgck --updatemetadata would write the same correct metadata to good mdas, and then to bad mdas, but the sequence of vg_write/vg_commit calls betwen good and bad mdas could cause a different description field to be generated for good/bad mdas. (The description field describing the command was recently included in the ondisk copy of the metadata text.)
109 lines
3.0 KiB
C
109 lines
3.0 KiB
C
/*
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* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
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* Copyright (C) 2004-2007 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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#include "tools.h"
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#include "lib/format_text/format-text.h"
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/*
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* TODO: we cannot yet repair corruption in label_header, pv_header/locations,
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* or corruption of some mda_header fields.
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*/
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static int _update_metadata_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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struct processing_handle *handle __attribute__((unused)))
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{
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/*
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* Simply calling vg_write can correct or clean up various things:
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* . some mda's have old versions of metdadata
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* . wipe outdated PVs
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* . fix pv_header used flag and version
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* . strip historical lvs
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* . clear missing pv flag on unused PV
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*/
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if (!vg_write(vg)) {
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log_error("Failed to write VG.");
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return 0;
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}
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/*
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* Prevent vg_commit from freeing the metadata
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* buffer that vg_write wrote to disk so that
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* vg_write_commit_bad_mdas() can use the same
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* metadata buffer to write to the bad mdas.
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*/
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preserve_text_fidtc(vg);
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if (!vg_commit(vg)) {
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log_error("Failed to commit VG.");
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return 0;
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}
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/*
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* vg_write does not write to "bad" mdas (where "bad" is corrupt, can't
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* be processed when reading). bad mdas are not kept in
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* fid->metadata_areas_in_use so vg_read and vg_write ignore them, but
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* they are saved in lvmcache. this gets them from lvmcache and tries
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* to write this metadata to them.
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*/
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vg_write_commit_bad_mdas(cmd, vg);
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/*
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* Now free the metadata buffer that was
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* preserved above.
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*/
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free_text_fidtc(vg);
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return 1;
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}
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static int _update_metadata(struct cmd_context *cmd, int argc, char **argv)
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{
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cmd->handles_missing_pvs = 1;
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cmd->wipe_outdated_pvs = 1;
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cmd->handles_unknown_segments = 1;
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return process_each_vg(cmd, argc, argv, NULL, NULL, READ_FOR_UPDATE, 0, NULL,
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&_update_metadata_single);
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}
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static int vgck_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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struct processing_handle *handle __attribute__((unused)))
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{
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if (!vg_validate(vg))
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return_ECMD_FAILED;
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if (vg_missing_pv_count(vg)) {
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log_error("The volume group is missing %d physical volumes.",
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vg_missing_pv_count(vg));
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return ECMD_FAILED;
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}
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return ECMD_PROCESSED;
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}
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int vgck(struct cmd_context *cmd, int argc, char **argv)
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{
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if (arg_is_set(cmd, updatemetadata_ARG))
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return _update_metadata(cmd, argc, argv);
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return process_each_vg(cmd, argc, argv, NULL, NULL, 0, 0, NULL,
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&vgck_single);
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}
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