1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
|
/*
* Copyright (C) 2003-2004 Sistina Software, Inc. All rights reserved.
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "lib.h"
#include "toolcontext.h"
#include "segtype.h"
#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"
#include "pv_alloc.h"
#include "metadata.h"
static const char *_striped_name(const struct lv_segment *seg)
{
return (seg->area_count == 1) ? "linear" : seg->segtype->name;
}
static void _striped_display(const struct lv_segment *seg)
{
uint32_t s;
if (seg->area_count == 1)
display_stripe(seg, 0, " ");
else {
log_print(" Stripes\t\t%u", seg->area_count);
if (seg->lv->vg->cmd->si_unit_consistency)
log_print(" Stripe size\t\t%s",
display_size(seg->lv->vg->cmd,
(uint64_t) seg->stripe_size));
else
log_print(" Stripe size\t\t%u KB",
seg->stripe_size / 2);
for (s = 0; s < seg->area_count; s++) {
log_print(" Stripe %d:", s);
display_stripe(seg, s, " ");
}
}
log_print(" ");
}
static int _striped_text_import_area_count(const struct dm_config_node *sn, uint32_t *area_count)
{
if (!dm_config_get_uint32(sn, "stripe_count", area_count)) {
log_error("Couldn't read 'stripe_count' for "
"segment '%s'.", dm_config_parent_name(sn));
return 0;
}
return 1;
}
static int _striped_text_import(struct lv_segment *seg, const struct dm_config_node *sn,
struct dm_hash_table *pv_hash)
{
const struct dm_config_node *cn;
if ((seg->area_count != 1) &&
!dm_config_get_uint32(sn, "stripe_size", &seg->stripe_size)) {
log_error("Couldn't read stripe_size for segment %s "
"of logical volume %s.", dm_config_parent_name(sn), seg->lv->name);
return 0;
}
if (!(cn = dm_config_find_node(sn, "stripes"))) {
log_error("Couldn't find stripes array for segment %s "
"of logical volume %s.", dm_config_parent_name(sn), seg->lv->name);
return 0;
}
seg->area_len /= seg->area_count;
return text_import_areas(seg, sn, cn, pv_hash, 0);
}
static int _striped_text_export(const struct lv_segment *seg, struct formatter *f)
{
outf(f, "stripe_count = %u%s", seg->area_count,
(seg->area_count == 1) ? "\t# linear" : "");
if (seg->area_count > 1)
outsize(f, (uint64_t) seg->stripe_size,
"stripe_size = %u", seg->stripe_size);
return out_areas(f, seg, "stripe");
}
/*
* Test whether two segments could be merged by the current merging code
*/
static int _striped_segments_compatible(struct lv_segment *first,
struct lv_segment *second)
{
uint32_t width;
unsigned s;
if ((first->area_count != second->area_count) ||
(first->stripe_size != second->stripe_size))
return 0;
for (s = 0; s < first->area_count; s++) {
/* FIXME Relax this to first area type != second area type */
/* plus the additional AREA_LV checks needed */
if ((seg_type(first, s) != AREA_PV) ||
(seg_type(second, s) != AREA_PV))
return 0;
width = first->area_len;
if ((seg_pv(first, s) !=
seg_pv(second, s)) ||
(seg_pe(first, s) + width !=
seg_pe(second, s)))
return 0;
}
if (!str_list_lists_equal(&first->tags, &second->tags))
return 0;
return 1;
}
static int _striped_merge_segments(struct lv_segment *seg1, struct lv_segment *seg2)
{
uint32_t s;
if (!_striped_segments_compatible(seg1, seg2))
return 0;
seg1->len += seg2->len;
seg1->area_len += seg2->area_len;
for (s = 0; s < seg1->area_count; s++)
if (seg_type(seg1, s) == AREA_PV)
merge_pv_segments(seg_pvseg(seg1, s),
seg_pvseg(seg2, s));
return 1;
}
#ifdef DEVMAPPER_SUPPORT
static int _striped_add_target_line(struct dev_manager *dm,
struct dm_pool *mem __attribute__((unused)),
struct cmd_context *cmd __attribute__((unused)),
void **target_state __attribute__((unused)),
struct lv_segment *seg,
const struct lv_activate_opts *laopts __attribute__((unused)),
struct dm_tree_node *node, uint64_t len,
uint32_t *pvmove_mirror_count __attribute__((unused)))
{
if (!seg->area_count) {
log_error(INTERNAL_ERROR "striped add_target_line called "
"with no areas for %s.", seg->lv->name);
return 0;
}
if (seg->area_count == 1) {
if (!dm_tree_node_add_linear_target(node, len))
return_0;
} else if (!dm_tree_node_add_striped_target(node, len,
seg->stripe_size))
return_0;
return add_areas_line(dm, seg, node, 0u, seg->area_count);
}
static int _striped_target_present(struct cmd_context *cmd,
const struct lv_segment *seg __attribute__((unused)),
unsigned *attributes __attribute__((unused)))
{
static int _striped_checked = 0;
static int _striped_present = 0;
if (!_striped_checked)
_striped_present = target_present(cmd, "linear", 0) &&
target_present(cmd, "striped", 0);
_striped_checked = 1;
return _striped_present;
}
#endif
static void _striped_destroy(struct segment_type *segtype)
{
dm_free(segtype);
}
static struct segtype_handler _striped_ops = {
.name = _striped_name,
.display = _striped_display,
.text_import_area_count = _striped_text_import_area_count,
.text_import = _striped_text_import,
.text_export = _striped_text_export,
.merge_segments = _striped_merge_segments,
#ifdef DEVMAPPER_SUPPORT
.add_target_line = _striped_add_target_line,
.target_present = _striped_target_present,
#endif
.destroy = _striped_destroy,
};
struct segment_type *init_striped_segtype(struct cmd_context *cmd)
{
struct segment_type *segtype = dm_zalloc(sizeof(*segtype));
if (!segtype)
return_NULL;
segtype->cmd = cmd;
segtype->ops = &_striped_ops;
segtype->name = "striped";
segtype->private = NULL;
segtype->flags =
SEG_CAN_SPLIT | SEG_AREAS_STRIPED | SEG_FORMAT1_SUPPORT;
log_very_verbose("Initialised segtype: %s", segtype->name);
return segtype;
}
|
