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68 lines
1.7 KiB
C
68 lines
1.7 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 LGPL.
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*
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*/
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#include "metadata.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 config_file *cf);
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void fin_locking(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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* 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 0x000000FF
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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 0x00000010 /* 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 0x0000FF00
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#define LCK_VG 0x00000000
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#define LCK_LV 0x00000100
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/*
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* Lock bits
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*/
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#define LCK_NONBLOCK 0x00010000 /* Don't block waiting for lock? */
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#define LCK_HOLD 0x00020000 /* Hold lock when lock_vol returns? */
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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_DEACTIVATE (LCK_LV | LCK_EXCL)
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#define LCK_LV_SUSPEND (LCK_LV | LCK_WRITE)
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#define LCK_LV_ACTIVATE (LCK_LV | LCK_READ)
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#define LCK_LV_UNLOCK (LCK_LV | LCK_UNLOCK)
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#define unlock_lv(cmd, vol) lock_vol(cmd, vol, LCK_LV_UNLOCK)
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#define unlock_vg(cmd, vol) lock_vol(cmd, vol, LCK_VG_UNLOCK)
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