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/*
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* Copyright ( C ) 2001 - 2004 Sistina Software , Inc . All rights reserved .
* 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 ,
* modify , copy , or redistribute it subject to the terms and conditions
* of the GNU General Public License v .2 .
*
* You should have received a copy of the GNU General Public License
* along with this program ; if not , write to the Free Software Foundation ,
* Inc . , 59 Temple Place , Suite 330 , Boston , MA 02111 - 1307 USA
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*/
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# ifndef _LVM_LOCKING_H
# define _LVM_LOCKING_H
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# include "uuid.h"
# include "config.h"
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int init_locking ( int type , struct config_tree * cf ) ;
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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
* Use " " to lock orphan PVs
* char * vol holds volume group name
*
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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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/*
* Does the LVM1 driver have this VG active ?
*/
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$_NLMODE */
# define LCK_READ 0x00000001 /* LCK$_CRMODE */
/* LCK$_CWMODE */
/* LCK$_PRMODE */
# define LCK_WRITE 0x00000004 /* LCK$_PWMODE */
# define LCK_EXCL 0x00000005 /* LCK$_EXMODE */
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# define LCK_UNLOCK 0x00000006 /* This is ours */
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/*
* Lock scope
*/
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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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/*
* Lock bits
*/
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# define LCK_NONBLOCK 0x00000010 /* Don't block waiting for lock? */
# 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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/*
* Additional lock bits for cluster communication
*/
# define LCK_PARTIAL_MODE 0x00000001 /* Running in partial mode */
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/*
* Common combinations
*/
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# define LCK_VG_READ (LCK_VG | LCK_READ | LCK_HOLD)
# 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)
# 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)
# define LCK_LV_DEACTIVATE (LCK_LV | LCK_NULL | LCK_NONBLOCK)
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# define LCK_LV_CLUSTERED(lv) \
( ( ( lv ) - > vg - > status & CLUSTERED ) ? LCK_CLUSTER_VG : 0 )
# define lock_lv_vol(cmd, lv, flags) \
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)
# define suspend_lv(cmd, lv) lock_lv_vol(cmd, lv, LCK_LV_SUSPEND | LCK_HOLD)
# define deactivate_lv(cmd, lv) lock_lv_vol(cmd, lv, LCK_LV_DEACTIVATE)
# 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 ) ;
int resume_lvs ( struct cmd_context * cmd , struct list * lvs ) ;
int activate_lvs_excl ( struct cmd_context * cmd , struct list * lvs ) ;
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# endif