1 /* $NetBSD: import.c,v 1.1.1.1 2008/12/22 00:18:16 haad Exp $ */
2
3 /*
4 * Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
5 * Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved.
6 *
7 * This file is part of LVM2.
8 *
9 * This copyrighted material is made available to anyone wishing to use,
10 * modify, copy, or redistribute it subject to the terms and conditions
11 * of the GNU Lesser General Public License v.2.1.
12 *
13 * You should have received a copy of the GNU Lesser General Public License
14 * along with this program; if not, write to the Free Software Foundation,
15 * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
16 */
17
18 #include "lib.h"
19 #include "metadata.h"
20 #include "import-export.h"
21 #include "display.h"
22 #include "toolcontext.h"
23 #include "lvmcache.h"
24
25 /* FIXME Use tidier inclusion method */
26 static struct text_vg_version_ops *(_text_vsn_list[2]);
27
28 static int _text_import_initialised = 0;
29
_init_text_import()30 static void _init_text_import()
31 {
32 if (_text_import_initialised)
33 return;
34
35 _text_vsn_list[0] = text_vg_vsn1_init();
36 _text_vsn_list[1] = NULL;
37 _text_import_initialised = 1;
38 }
39
text_vgname_import(const struct format_type * fmt,struct device * dev,off_t offset,uint32_t size,off_t offset2,uint32_t size2,checksum_fn_t checksum_fn,uint32_t checksum,struct id * vgid,uint32_t * vgstatus,char ** creation_host)40 const char *text_vgname_import(const struct format_type *fmt,
41 struct device *dev,
42 off_t offset, uint32_t size,
43 off_t offset2, uint32_t size2,
44 checksum_fn_t checksum_fn, uint32_t checksum,
45 struct id *vgid, uint32_t *vgstatus,
46 char **creation_host)
47 {
48 struct config_tree *cft;
49 struct text_vg_version_ops **vsn;
50 const char *vgname = NULL;
51
52 _init_text_import();
53
54 if (!(cft = create_config_tree(NULL, 0)))
55 return_NULL;
56
57 if ((!dev && !read_config_file(cft)) ||
58 (dev && !read_config_fd(cft, dev, offset, size,
59 offset2, size2, checksum_fn, checksum)))
60 goto_out;
61
62 /*
63 * Find a set of version functions that can read this file
64 */
65 for (vsn = &_text_vsn_list[0]; *vsn; vsn++) {
66 if (!(*vsn)->check_version(cft))
67 continue;
68
69 if (!(vgname = (*vsn)->read_vgname(fmt, cft, vgid, vgstatus,
70 creation_host)))
71 goto_out;
72
73 break;
74 }
75
76 out:
77 destroy_config_tree(cft);
78 return vgname;
79 }
80
text_vg_import_fd(struct format_instance * fid,const char * file,struct device * dev,off_t offset,uint32_t size,off_t offset2,uint32_t size2,checksum_fn_t checksum_fn,uint32_t checksum,time_t * when,char ** desc)81 struct volume_group *text_vg_import_fd(struct format_instance *fid,
82 const char *file,
83 struct device *dev,
84 off_t offset, uint32_t size,
85 off_t offset2, uint32_t size2,
86 checksum_fn_t checksum_fn,
87 uint32_t checksum,
88 time_t *when, char **desc)
89 {
90 struct volume_group *vg = NULL;
91 struct config_tree *cft;
92 struct text_vg_version_ops **vsn;
93
94 _init_text_import();
95
96 *desc = NULL;
97 *when = 0;
98
99 if (!(cft = create_config_tree(file, 0)))
100 return_NULL;
101
102 if ((!dev && !read_config_file(cft)) ||
103 (dev && !read_config_fd(cft, dev, offset, size,
104 offset2, size2, checksum_fn, checksum))) {
105 log_error("Couldn't read volume group metadata.");
106 goto out;
107 }
108
109 /*
110 * Find a set of version functions that can read this file
111 */
112 for (vsn = &_text_vsn_list[0]; *vsn; vsn++) {
113 if (!(*vsn)->check_version(cft))
114 continue;
115
116 if (!(vg = (*vsn)->read_vg(fid, cft)))
117 goto_out;
118
119 (*vsn)->read_desc(fid->fmt->cmd->mem, cft, when, desc);
120 break;
121 }
122
123 out:
124 destroy_config_tree(cft);
125 return vg;
126 }
127
text_vg_import_file(struct format_instance * fid,const char * file,time_t * when,char ** desc)128 struct volume_group *text_vg_import_file(struct format_instance *fid,
129 const char *file,
130 time_t *when, char **desc)
131 {
132 return text_vg_import_fd(fid, file, NULL, (off_t)0, 0, (off_t)0, 0, NULL, 0,
133 when, desc);
134 }
135
import_vg_from_buffer(char * buf,struct format_instance * fid)136 struct volume_group *import_vg_from_buffer(char *buf,
137 struct format_instance *fid)
138 {
139 struct volume_group *vg = NULL;
140 struct config_tree *cft;
141 struct text_vg_version_ops **vsn;
142
143 _init_text_import();
144
145 if (!(cft = create_config_tree_from_string(fid->fmt->cmd, buf)))
146 return_NULL;
147
148 for (vsn = &_text_vsn_list[0]; *vsn; vsn++) {
149 if (!(*vsn)->check_version(cft))
150 continue;
151 if (!(vg = (*vsn)->read_vg(fid, cft)))
152 stack;
153 break;
154 }
155
156 destroy_config_tree(cft);
157 return vg;
158 }
159