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/*
* Copyright ( C ) 2004 Red Hat , Inc . All rights reserved .
*
* This file is part of LVM2 .
*
* 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
*/
# include "lib.h"
# include "toolcontext.h"
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# include "segtype.h"
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# include "display.h"
# include "text_export.h"
# include "text_import.h"
# include "config.h"
# include "str_list.h"
# include "targets.h"
# include "lvm-string.h"
# include "activate.h"
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static const char * _zero_name ( const struct lv_segment * seg )
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{
return seg - > segtype - > name ;
}
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static int _zero_merge_segments ( struct lv_segment * seg1 , struct lv_segment * seg2 )
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{
seg1 - > len + = seg2 - > len ;
seg1 - > area_len + = seg2 - > area_len ;
return 1 ;
}
# ifdef DEVMAPPER_SUPPORT
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static int _zero_add_target_line ( struct dev_manager * dm __attribute ( ( unused ) ) ,
struct dm_pool * mem __attribute ( ( unused ) ) ,
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struct cmd_context * cmd __attribute ( ( unused ) ) ,
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void * * target_state __attribute ( ( unused ) ) ,
struct lv_segment * seg __attribute ( ( unused ) ) ,
struct dm_tree_node * node , uint64_t len ,
uint32_t * pvmove_mirror_count __attribute ( ( unused ) ) )
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{
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return dm_tree_node_add_zero_target ( node , len ) ;
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}
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static int _zero_target_present ( const struct lv_segment * seg __attribute ( ( unused ) ) )
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{
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static int _zero_checked = 0 ;
static int _zero_present = 0 ;
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if ( ! _zero_checked )
_zero_present = target_present ( " zero " , 0 ) ;
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_zero_checked = 1 ;
return _zero_present ;
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}
# endif
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static int _zero_modules_needed ( struct dm_pool * mem ,
const struct lv_segment * seg ,
struct list * modules )
{
if ( ! str_list_add ( mem , modules , " zero " ) ) {
log_error ( " zero module string list allocation failed " ) ;
return 0 ;
}
return 1 ;
}
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static void _zero_destroy ( const struct segment_type * segtype )
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{
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dm_free ( ( void * ) segtype ) ;
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}
static struct segtype_handler _zero_ops = {
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. name = _zero_name ,
. merge_segments = _zero_merge_segments ,
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# ifdef DEVMAPPER_SUPPORT
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. add_target_line = _zero_add_target_line ,
. target_present = _zero_target_present ,
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# endif
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. modules_needed = _zero_modules_needed ,
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. destroy = _zero_destroy ,
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} ;
struct segment_type * init_zero_segtype ( struct cmd_context * cmd )
{
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struct segment_type * segtype = dm_malloc ( sizeof ( * segtype ) ) ;
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if ( ! segtype ) {
stack ;
return NULL ;
}
segtype - > cmd = cmd ;
segtype - > ops = & _zero_ops ;
segtype - > name = " zero " ;
segtype - > private = NULL ;
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segtype - > flags = SEG_CAN_SPLIT | SEG_VIRTUAL | SEG_CANNOT_BE_ZEROED ;
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log_very_verbose ( " Initialised segtype: %s " , segtype - > name ) ;
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return segtype ;
}