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99 lines
2.6 KiB
C
99 lines
2.6 KiB
C
/*
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* Copyright (C) 2004-2007 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,
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* modify, copy, or redistribute it subject to the terms and conditions
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* of the GNU Lesser General Public License v.2.1.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "lib.h"
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#include "segtype.h"
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#include "str_list.h"
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#include "activate.h"
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static int _zero_merge_segments(struct lv_segment *seg1, struct lv_segment *seg2)
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{
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seg1->len += seg2->len;
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seg1->area_len += seg2->area_len;
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return 1;
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}
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#ifdef DEVMAPPER_SUPPORT
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static int _zero_add_target_line(struct dev_manager *dm __attribute__((unused)),
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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)),
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struct lv_segment *seg __attribute__((unused)),
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const struct lv_activate_opts *laopts __attribute__((unused)),
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struct dm_tree_node *node,uint64_t len,
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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(struct cmd_context *cmd,
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const struct lv_segment *seg __attribute__((unused)),
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unsigned *attributes __attribute__((unused)))
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{
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static int _zero_checked = 0;
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static int _zero_present = 0;
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if (!_zero_checked)
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_zero_present = target_present(cmd, "zero", 1);
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_zero_checked = 1;
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return _zero_present;
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}
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static int _zero_modules_needed(struct dm_pool *mem,
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const struct lv_segment *seg __attribute__((unused)),
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struct dm_list *modules)
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{
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if (!str_list_add(mem, modules, "zero")) {
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log_error("zero module string list allocation failed");
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return 0;
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}
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return 1;
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}
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#endif
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static void _zero_destroy(struct segment_type *segtype)
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{
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dm_free(segtype);
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}
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static struct segtype_handler _zero_ops = {
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.merge_segments = _zero_merge_segments,
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#ifdef DEVMAPPER_SUPPORT
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.add_target_line = _zero_add_target_line,
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.target_present = _zero_target_present,
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.modules_needed = _zero_modules_needed,
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#endif
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.destroy = _zero_destroy,
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};
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struct segment_type *init_zero_segtype(struct cmd_context *cmd)
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{
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struct segment_type *segtype = dm_zalloc(sizeof(*segtype));
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if (!segtype)
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return_NULL;
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segtype->ops = &_zero_ops;
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segtype->name = "zero";
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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;
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}
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