1 /* $NetBSD: vgcfgbackup.c,v 1.1.1.2 2009/12/02 00:25:56 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 *
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 "tools.h"
19
_expand_filename(const char * template,const char * vg_name,char ** last_filename)20 static char *_expand_filename(const char *template, const char *vg_name,
21 char **last_filename)
22 {
23 char *filename;
24
25 if (security_level())
26 return dm_strdup(template);
27
28 if (!(filename = dm_malloc(PATH_MAX))) {
29 log_error("Failed to allocate filename.");
30 return NULL;
31 }
32
33 if (snprintf(filename, PATH_MAX, template, vg_name) < 0) {
34 log_error("Error processing filename template %s",
35 template);
36 dm_free(filename);
37 return NULL;
38 }
39 if (*last_filename && !strncmp(*last_filename, filename, PATH_MAX)) {
40 log_error("VGs must be backed up into different files. "
41 "Use %%s in filename for VG name.");
42 dm_free(filename);
43 return NULL;
44 }
45
46 dm_free(*last_filename);
47 *last_filename = filename;
48
49 return filename;
50 }
51
vg_backup_single(struct cmd_context * cmd,const char * vg_name,struct volume_group * vg,void * handle)52 static int vg_backup_single(struct cmd_context *cmd, const char *vg_name,
53 struct volume_group *vg,
54 void *handle)
55 {
56 char **last_filename = (char **)handle;
57 char *filename;
58
59 if (arg_count(cmd, file_ARG)) {
60 if (!(filename = _expand_filename(arg_value(cmd, file_ARG),
61 vg->name, last_filename))) {
62 stack;
63 return ECMD_FAILED;
64 }
65
66 if (!backup_to_file(filename, vg->cmd->cmd_line, vg)) {
67 stack;
68 return ECMD_FAILED;
69 }
70 } else {
71 if (vg_read_error(vg) == FAILED_INCONSISTENT) {
72 log_error("No backup taken: specify filename with -f "
73 "to backup an inconsistent VG");
74 stack;
75 return ECMD_FAILED;
76 }
77
78 /* just use the normal backup code */
79 backup_enable(cmd, 1); /* force a backup */
80 if (!backup(vg)) {
81 stack;
82 return ECMD_FAILED;
83 }
84 }
85
86 log_print("Volume group \"%s\" successfully backed up.", vg_name);
87 return ECMD_PROCESSED;
88 }
89
vgcfgbackup(struct cmd_context * cmd,int argc,char ** argv)90 int vgcfgbackup(struct cmd_context *cmd, int argc, char **argv)
91 {
92 int ret;
93 char *last_filename = NULL;
94
95 init_pvmove(1);
96
97 ret = process_each_vg(cmd, argc, argv, READ_ALLOW_INCONSISTENT,
98 &last_filename, &vg_backup_single);
99
100 dm_free(last_filename);
101
102 init_pvmove(0);
103
104 return ret;
105 }
106