1 /* $NetBSD: filter_netbsd.c,v 1.3 2009/12/02 01:53:25 haad Exp $ */
2
3 /*
4 * Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
5 * Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
6 * Copyright (C) 2008 Adam Hamsik. All rights reserved.
7 * Copyright (C) 2010 Alex Hornung. All rights reserved.
8 *
9 * This file is part of LVM2.
10 *
11 * This copyrighted material is made available to anyone wishing to use,
12 * modify, copy, or redistribute it subject to the terms and conditions
13 * of the GNU Lesser General Public License v.2.1.
14 *
15 * You should have received a copy of the GNU Lesser General Public License
16 * along with this program; if not, write to the Free Software Foundation,
17 * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 */
19
20 #include "lib.h"
21 #include "dev-cache.h"
22 #include "filter.h"
23 #include "lvm-string.h"
24 #include "config.h"
25 #include "metadata.h"
26 #include "activate.h"
27
28 #include <sys/filio.h>
29 #include <sys/device.h>
30 #include <sys/sysctl.h>
31
32 #include <ctype.h>
33 #include <dirent.h>
34 #include <fcntl.h>
35 #include <limits.h>
36 #include <unistd.h>
37
38 #define NUMBER_OF_MAJORS 4096
39
40 #define LVM_SUCCESS 1
41 #define LVM_FAILURE 0
42
43 /* -1 means LVM won't use this major number. */
44 static int _char_device_major[NUMBER_OF_MAJORS];
45 static int _block_device_major[NUMBER_OF_MAJORS];
46
47 typedef struct {
48 const char *name;
49 const int max_partitions;
50 } device_info_t;
51
52 static int _md_major = -1;
53 static int _device_mapper_major = -1;
54
md_major(void)55 int md_major(void)
56 {
57 return _md_major;
58 }
59
dev_subsystem_part_major(const struct device * dev)60 int dev_subsystem_part_major(const struct device *dev)
61 {
62 return 0;
63 }
64
dev_subsystem_name(const struct device * dev)65 const char *dev_subsystem_name(const struct device *dev)
66 {
67 return "";
68 }
69
70
71 /*
72 * Test if device passes filter tests and can be inserted in to cache.
73 */
_passes_lvm_type_device_filter(struct dev_filter * f __attribute ((unused)),struct device * dev)74 static int _passes_lvm_type_device_filter(struct dev_filter *f __attribute((unused)),
75 struct device *dev)
76 {
77 const char *name = dev_name(dev);
78 int fd, type;
79 int ret = LVM_FAILURE;
80 uint64_t size;
81
82 log_debug("Checking: %s", name);
83
84 if ((fd = open(name, O_RDONLY)) < 0) {
85 log_debug("%s: Skipping: Could not open device", name);
86 return LVM_FAILURE;
87 }
88 if (ioctl(fd, FIODTYPE, &type) == -1) {
89 close(fd);
90 log_debug("%s: Skipping: Could not get device type", name);
91 return LVM_FAILURE;
92 } else {
93 if (!(type & D_DISK)) {
94 close(fd);
95 log_debug("%s: Skipping: Device is not of type D_DISK", name);
96 return LVM_FAILURE;
97 }
98 }
99
100 close(fd);
101
102 /* Skip suspended devices */
103 if (MAJOR(dev->dev) == _device_mapper_major &&
104 ignore_suspended_devices() && !device_is_usable(dev->dev)) {
105 log_debug("%s: Skipping: Suspended dm device", name);
106 return LVM_FAILURE;
107 }
108
109 /* Check it's accessible */
110 if (!dev_open_flags(dev, O_RDONLY, 0, 1)) {
111 log_debug("%s: Skipping: open failed", name);
112 return LVM_FAILURE;
113 }
114
115 /* Check it's not too small */
116 if (!dev_get_size(dev, &size)) {
117 log_debug("%s: Skipping: dev_get_size failed", name);
118 goto out;
119 }
120
121 if (size < PV_MIN_SIZE) {
122 log_debug("%s: Skipping: Too small to hold a PV", name);
123 goto out;
124 }
125
126 if (is_partitioned_dev(dev)) {
127 log_debug("%s: Skipping: Partition table signature found",
128 name);
129 goto out;
130 }
131
132 ret = LVM_SUCCESS;
133
134 out:
135 dev_close(dev);
136
137 return ret;
138 }
139
max_partitions(int major)140 int max_partitions(int major)
141 {
142 /* XXX */
143 return 64;
144 }
145
lvm_type_filter_create(const char * proc,const struct config_node * cn)146 struct dev_filter *lvm_type_filter_create(const char *proc,
147 const struct config_node *cn)
148 {
149 struct dev_filter *f;
150
151 if (!(f = dm_malloc(sizeof(struct dev_filter)))) {
152 log_error("LVM type filter allocation failed");
153 return NULL;
154 }
155
156 f->passes_filter = _passes_lvm_type_device_filter;
157 f->destroy = lvm_type_filter_destroy;
158 f->private = NULL;
159
160 return f;
161 }
162
lvm_type_filter_destroy(struct dev_filter * f)163 void lvm_type_filter_destroy(struct dev_filter *f)
164 {
165 dm_free(f);
166 return;
167 }
168