1/*	$NetBSD$	*/
2
3/*
4 * Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
5 *
6 * This file is part of LVM2.
7 *
8 * This copyrighted material is made available to anyone wishing to use,
9 * modify, copy, or redistribute it subject to the terms and conditions
10 * of the GNU Lesser General Public License v.2.1.
11 *
12 * You should have received a copy of the GNU Lesser General Public License
13 * along with this program; if not, write to the Free Software Foundation,
14 * Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
15 */
16
17#include "lib.h"
18#include "toolcontext.h"
19#include "segtype.h"
20#include "display.h"
21#include "text_export.h"
22#include "text_import.h"
23#include "config.h"
24#include "str_list.h"
25#include "targets.h"
26#include "lvm-string.h"
27#include "activate.h"
28#include "str_list.h"
29#include "metadata.h"
30
31static const char *_errseg_name(const struct lv_segment *seg)
32{
33	return seg->segtype->name;
34}
35
36static int _errseg_merge_segments(struct lv_segment *seg1, struct lv_segment *seg2)
37{
38	seg1->len += seg2->len;
39	seg1->area_len += seg2->area_len;
40
41	return 1;
42}
43
44#ifdef DEVMAPPER_SUPPORT
45static int _errseg_add_target_line(struct dev_manager *dm __attribute((unused)),
46				struct dm_pool *mem __attribute((unused)),
47				struct cmd_context *cmd __attribute((unused)),
48				void **target_state __attribute((unused)),
49				struct lv_segment *seg __attribute((unused)),
50				struct dm_tree_node *node, uint64_t len,
51				uint32_t *pvmove_mirror_count __attribute((unused)))
52{
53	return dm_tree_node_add_error_target(node, len);
54}
55
56static int _errseg_target_present(struct cmd_context *cmd,
57				  const struct lv_segment *seg __attribute((unused)),
58				  unsigned *attributes __attribute((unused)))
59{
60	static int _errseg_checked = 0;
61	static int _errseg_present = 0;
62
63	/* Reported truncated in older kernels */
64	if (!_errseg_checked &&
65	    (target_present(cmd, "error", 0) ||
66	     target_present(cmd, "erro", 0)))
67		_errseg_present = 1;
68
69	_errseg_checked = 1;
70	return _errseg_present;
71}
72#endif
73
74static int _errseg_modules_needed(struct dm_pool *mem,
75				  const struct lv_segment *seg __attribute((unused)),
76				  struct dm_list *modules)
77{
78	if (!str_list_add(mem, modules, "error")) {
79		log_error("error module string list allocation failed");
80		return 0;
81	}
82
83	return 1;
84}
85
86static void _errseg_destroy(const struct segment_type *segtype)
87{
88	dm_free((void *)segtype);
89}
90
91static struct segtype_handler _error_ops = {
92	.name = _errseg_name,
93	.merge_segments = _errseg_merge_segments,
94#ifdef DEVMAPPER_SUPPORT
95	.add_target_line = _errseg_add_target_line,
96	.target_present = _errseg_target_present,
97#endif
98	.modules_needed = _errseg_modules_needed,
99	.destroy = _errseg_destroy,
100};
101
102struct segment_type *init_error_segtype(struct cmd_context *cmd)
103{
104	struct segment_type *segtype = dm_malloc(sizeof(*segtype));
105
106	if (!segtype)
107		return_NULL;
108
109	segtype->cmd = cmd;
110	segtype->ops = &_error_ops;
111	segtype->name = "error";
112	segtype->private = NULL;
113	segtype->flags = SEG_CAN_SPLIT | SEG_VIRTUAL | SEG_CANNOT_BE_ZEROED;
114
115	log_very_verbose("Initialised segtype: %s", segtype->name);
116
117	return segtype;
118}
119