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
|
/*
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004-2013 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/filters/filter.h"
#include "lib/device/device.h"
static int _and_p(struct cmd_context *cmd, struct dev_filter *f, struct device *dev, const char *use_filter_name)
{
struct dev_filter **filters;
int ret;
for (filters = (struct dev_filter **) f->private; *filters; ++filters) {
if (use_filter_name && strcmp((*filters)->name, use_filter_name))
continue;
ret = (*filters)->passes_filter(cmd, *filters, dev, use_filter_name);
if (!ret)
return 0; /* No 'stack': a filter, not an error. */
}
return 1;
}
static int _and_p_with_dev_ext_info(struct cmd_context *cmd, struct dev_filter *f, struct device *dev, const char *use_filter_name)
{
int r;
dev_ext_enable(dev, external_device_info_source());
r = _and_p(cmd, f, dev, use_filter_name);
dev_ext_disable(dev);
return r;
}
static void _composite_destroy(struct dev_filter *f)
{
struct dev_filter **filters;
if (f->use_count)
log_error(INTERNAL_ERROR "Destroying composite filter while in use %u times.", f->use_count);
for (filters = (struct dev_filter **) f->private; *filters; ++filters)
(*filters)->destroy(*filters);
free(f->private);
free(f);
}
static void _wipe(struct cmd_context *cmd, struct dev_filter *f, struct device *dev, const char *use_filter_name)
{
struct dev_filter **filters;
for (filters = (struct dev_filter **) f->private; *filters; ++filters)
if (use_filter_name && strcmp((*filters)->name, use_filter_name))
continue;
if ((*filters)->wipe)
(*filters)->wipe(cmd, *filters, dev, use_filter_name);
}
struct dev_filter *composite_filter_create(int n, int use_dev_ext_info, struct dev_filter **filters)
{
struct dev_filter **filters_copy, *cft;
if (!filters)
return_NULL;
if (!(filters_copy = malloc(sizeof(*filters) * (n + 1)))) {
log_error("Composite filters allocation failed.");
return NULL;
}
memcpy(filters_copy, filters, sizeof(*filters) * n);
filters_copy[n] = NULL;
if (!(cft = zalloc(sizeof(*cft)))) {
log_error("Composite filters allocation failed.");
free(filters_copy);
return NULL;
}
cft->passes_filter = use_dev_ext_info ? _and_p_with_dev_ext_info : _and_p;
cft->destroy = _composite_destroy;
cft->wipe = _wipe;
cft->use_count = 0;
cft->private = filters_copy;
cft->name = "composite";
log_debug_devs("Composite filter initialised.");
return cft;
}
|