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2293567c8c
Add --config for overriding most config file settings from cmdline. Quote arguments when printing command line. Remove linefeed from 'initialising logging' message. Add 'Completed' debug message. Don't attempt library exit after reloading config files. Always compile with libdevmapper, even if device-mapper is disabled.
119 lines
3.7 KiB
C
119 lines
3.7 KiB
C
/*
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* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
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* Copyright (C) 2004 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 General Public License v.2.
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*
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* You should have received a copy of the GNU 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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#ifndef _LVM_LOCKING_H
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#define _LVM_LOCKING_H
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#include "uuid.h"
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#include "config.h"
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int init_locking(int type, struct cmd_context *cmd);
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void fin_locking(void);
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void reset_locking(void);
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int vg_write_lock_held(void);
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int locking_is_clustered(void);
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/*
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* LCK_VG:
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* Lock/unlock on-disk volume group data
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* Use "" to lock orphan PVs
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* char *vol holds volume group name
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*
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* LCK_LV:
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* Lock/unlock an individual logical volume
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* char *vol holds lvid
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*/
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int lock_vol(struct cmd_context *cmd, const char *vol, int flags);
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/*
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* Does the LVM1 driver have this VG active?
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*/
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int check_lvm1_vg_inactive(struct cmd_context *cmd, const char *vgname);
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/*
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* Lock type - these numbers are the same as VMS and the IBM DLM
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*/
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#define LCK_TYPE_MASK 0x00000007
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#define LCK_NULL 0x00000000 /* LCK$_NLMODE */
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#define LCK_READ 0x00000001 /* LCK$_CRMODE */
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/* LCK$_CWMODE */
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/* LCK$_PRMODE */
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#define LCK_WRITE 0x00000004 /* LCK$_PWMODE */
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#define LCK_EXCL 0x00000005 /* LCK$_EXMODE */
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#define LCK_UNLOCK 0x00000006 /* This is ours */
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/*
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* Lock scope
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*/
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#define LCK_SCOPE_MASK 0x00000008
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#define LCK_VG 0x00000000
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#define LCK_LV 0x00000008
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/*
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* Lock bits
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*/
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#define LCK_NONBLOCK 0x00000010 /* Don't block waiting for lock? */
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#define LCK_HOLD 0x00000020 /* Hold lock when lock_vol returns? */
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#define LCK_LOCAL 0x00000040 /* Don't propagate to other nodes */
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#define LCK_CLUSTER_VG 0x00000080 /* VG is clustered */
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/*
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* Additional lock bits for cluster communication
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*/
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#define LCK_PARTIAL_MODE 0x00000001 /* Running in partial mode */
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#define LCK_MIRROR_NOSYNC_MODE 0x00000002 /* Mirrors don't require sync */
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#define LCK_DMEVENTD_REGISTER_MODE 0x00000004 /* Register with dmeventd */
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/*
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* Common combinations
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*/
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#define LCK_VG_READ (LCK_VG | LCK_READ | LCK_HOLD)
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#define LCK_VG_WRITE (LCK_VG | LCK_WRITE | LCK_HOLD)
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#define LCK_VG_UNLOCK (LCK_VG | LCK_UNLOCK)
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#define LCK_LV_EXCLUSIVE (LCK_LV | LCK_EXCL | LCK_NONBLOCK)
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#define LCK_LV_SUSPEND (LCK_LV | LCK_WRITE | LCK_NONBLOCK)
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#define LCK_LV_RESUME (LCK_LV | LCK_UNLOCK | LCK_NONBLOCK)
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#define LCK_LV_ACTIVATE (LCK_LV | LCK_READ | LCK_NONBLOCK)
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#define LCK_LV_DEACTIVATE (LCK_LV | LCK_NULL | LCK_NONBLOCK)
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#define LCK_LV_CLUSTERED(lv) \
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(((lv)->vg->status & CLUSTERED) ? LCK_CLUSTER_VG : 0)
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#define lock_lv_vol(cmd, lv, flags) \
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lock_vol(cmd, (lv)->lvid.s, flags | LCK_LV_CLUSTERED(lv))
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#define unlock_vg(cmd, vol) lock_vol(cmd, vol, LCK_VG_UNLOCK)
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#define resume_lv(cmd, lv) lock_lv_vol(cmd, lv, LCK_LV_RESUME)
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#define suspend_lv(cmd, lv) lock_lv_vol(cmd, lv, LCK_LV_SUSPEND | LCK_HOLD)
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#define deactivate_lv(cmd, lv) lock_lv_vol(cmd, lv, LCK_LV_DEACTIVATE)
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#define activate_lv(cmd, lv) lock_lv_vol(cmd, lv, LCK_LV_ACTIVATE | LCK_HOLD)
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#define activate_lv_excl(cmd, lv) \
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lock_lv_vol(cmd, lv, LCK_LV_EXCLUSIVE | LCK_HOLD)
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#define activate_lv_local(cmd, lv) \
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lock_lv_vol(cmd, lv, LCK_LV_ACTIVATE | LCK_HOLD | LCK_LOCAL)
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#define deactivate_lv_local(cmd, lv) \
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lock_lv_vol(cmd, lv, LCK_LV_DEACTIVATE | LCK_LOCAL)
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/* Process list of LVs */
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int suspend_lvs(struct cmd_context *cmd, struct list *lvs);
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int resume_lvs(struct cmd_context *cmd, struct list *lvs);
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int activate_lvs_excl(struct cmd_context *cmd, struct list *lvs);
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#endif
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