mirror of
git://sourceware.org/git/lvm2.git
synced 2024-12-21 13:34:40 +03:00
103 lines
2.7 KiB
C
103 lines
2.7 KiB
C
/*
|
|
* Copyright (C) 2004-2007 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 Lesser General Public License v.2.1.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public License
|
|
* along with this program; if not, write to the Free Software Foundation,
|
|
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "base/memory/zalloc.h"
|
|
#include "lib/misc/lib.h"
|
|
#include "lib/metadata/segtype.h"
|
|
#include "lib/datastruct/str_list.h"
|
|
#include "lib/activate/activate.h"
|
|
|
|
static int _zero_merge_segments(struct lv_segment *seg1, struct lv_segment *seg2)
|
|
{
|
|
seg1->len += seg2->len;
|
|
seg1->area_len += seg2->area_len;
|
|
|
|
return 1;
|
|
}
|
|
|
|
#ifdef DEVMAPPER_SUPPORT
|
|
static int _zero_add_target_line(struct dev_manager *dm __attribute__((unused)),
|
|
struct dm_pool *mem __attribute__((unused)),
|
|
struct cmd_context *cmd __attribute__((unused)),
|
|
void **target_state __attribute__((unused)),
|
|
struct lv_segment *seg __attribute__((unused)),
|
|
const struct lv_activate_opts *laopts __attribute__((unused)),
|
|
struct dm_tree_node *node,uint64_t len,
|
|
uint32_t *pvmove_mirror_count __attribute__((unused)))
|
|
{
|
|
return dm_tree_node_add_zero_target(node, len);
|
|
}
|
|
|
|
static int _zero_target_present(struct cmd_context *cmd,
|
|
const struct lv_segment *seg __attribute__((unused)),
|
|
unsigned *attributes __attribute__((unused)))
|
|
{
|
|
static int _zero_checked = 0;
|
|
static int _zero_present = 0;
|
|
|
|
if (!activation())
|
|
return 0;
|
|
|
|
if (!_zero_checked) {
|
|
_zero_checked = 1;
|
|
_zero_present = target_present(cmd, TARGET_NAME_ZERO, 1);
|
|
}
|
|
|
|
return _zero_present;
|
|
}
|
|
|
|
static int _zero_modules_needed(struct dm_pool *mem,
|
|
const struct lv_segment *seg __attribute__((unused)),
|
|
struct dm_list *modules)
|
|
{
|
|
if (!str_list_add(mem, modules, MODULE_NAME_ZERO)) {
|
|
log_error("zero module string list allocation failed");
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
#endif
|
|
|
|
static void _zero_destroy(struct segment_type *segtype)
|
|
{
|
|
free(segtype);
|
|
}
|
|
|
|
static const struct segtype_handler _zero_ops = {
|
|
.merge_segments = _zero_merge_segments,
|
|
#ifdef DEVMAPPER_SUPPORT
|
|
.add_target_line = _zero_add_target_line,
|
|
.target_present = _zero_target_present,
|
|
.modules_needed = _zero_modules_needed,
|
|
#endif
|
|
.destroy = _zero_destroy,
|
|
};
|
|
|
|
struct segment_type *init_zero_segtype(struct cmd_context *cmd)
|
|
{
|
|
struct segment_type *segtype = zalloc(sizeof(*segtype));
|
|
|
|
if (!segtype)
|
|
return_NULL;
|
|
|
|
segtype->ops = &_zero_ops;
|
|
segtype->name = SEG_TYPE_NAME_ZERO;
|
|
segtype->flags = SEG_CAN_SPLIT | SEG_VIRTUAL | SEG_CANNOT_BE_ZEROED;
|
|
|
|
log_very_verbose("Initialised segtype: %s", segtype->name);
|
|
|
|
return segtype;
|
|
}
|