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09b0eea6a0
This adds an optimization for some common cases in which the VG lock can be acquired early, prior to label scan. This reduces the chance that devices may be changed between label scan and the normal vg lock in vg_read. This is a proof-of-concept / experimental patch for testing.
46 lines
1.4 KiB
C
46 lines
1.4 KiB
C
/*
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* Copyright (C) 2004-2018 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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#ifndef _LVM_HINTS_H
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#define _LVM_HINTS_H
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struct hint {
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struct dm_list list;
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dev_t devt;
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char name[PATH_MAX] __attribute__((aligned(8)));
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char vgname[NAME_LEN] __attribute__((aligned(8)));
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char pvid[ID_LEN + 1] __attribute__((aligned(8)));
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unsigned chosen:1; /* this hint's dev was chosen for scanning */
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};
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void free_hints(struct dm_list *hints);
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int write_hint_file(struct cmd_context *cmd, int newhints);
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void clear_hint_file(struct cmd_context *cmd);
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void invalidate_hints(struct cmd_context *cmd);
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int get_hints(struct cmd_context *cmd, struct dm_list *hints, int *newhints,
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struct dm_list *devs_in, struct dm_list *devs_out, char **vgname_out);
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int validate_hints(struct cmd_context *cmd, struct dm_list *hints);
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void hints_exit(struct cmd_context *cmd);
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void pvscan_recreate_hints_begin(struct cmd_context *cmd);
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#endif
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