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f4cbeaf0ac
o #defines for common lock flag combinations o Try out hyphens instead of colons in device-mapper names - does this make messages containing filenames easier to read?
66 lines
1.4 KiB
C
66 lines
1.4 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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* If it's active, LCK_WRITE suspends it; LCK_EXCLUSIVE deactivates it;
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* LCK_NONE unsuspends it.
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* LCK_READ activates it.
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* char *vol holds "VG_name/LV_uuid"
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*
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* FIXME: Change to something like
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* int lock_vol(struct cmd_context *cmd, const struct id *id, int flags);
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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
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*/
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#define LCK_TYPE_MASK 0x000000FF
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#define LCK_NONE 0x00000000
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#define LCK_READ 0x00000001
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#define LCK_WRITE 0x00000002
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#define LCK_EXCL 0x00000003
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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
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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)
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#define LCK_VG_WRITE (LCK_VG | LCK_WRITE)
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#define LCK_VG_UNLOCK (LCK_VG | LCK_NONE)
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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_NONE)
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