2 * volume_id - reads filesystem label and uuid
4 * Copyright (C) 2005 Kay Sievers <kay.sievers@vrfy.org>
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
38 #include <asm/types.h>
40 #include "volume_id.h"
54 #include "highpoint.h"
56 #include "linux_swap.h"
57 #include "linux_raid.h"
66 int volume_id_probe_all(struct volume_id *id, unsigned long long off, unsigned long long size)
71 /* probe for raid first, cause fs probes may be successful on raid members */
72 if (volume_id_probe_linux_raid(id, off, size) == 0)
75 if (volume_id_probe_lvm1(id, off) == 0)
78 if (volume_id_probe_lvm2(id, off) == 0)
81 if (volume_id_probe_highpoint_ataraid(id, off) == 0)
84 if (volume_id_probe_luks(id, off) == 0)
87 /* signature in the first block, only small buffer needed */
88 if (volume_id_probe_vfat(id, off) == 0)
91 if (volume_id_probe_mac_partition_map(id, off) == 0)
94 if (volume_id_probe_xfs(id, off) == 0)
97 /* fill buffer with maximum */
98 volume_id_get_buffer(id, 0, SB_BUFFER_SIZE);
100 if (volume_id_probe_linux_swap(id, off) == 0)
103 if (volume_id_probe_ext(id, off) == 0)
106 if (volume_id_probe_reiserfs(id, off) == 0)
109 if (volume_id_probe_jfs(id, off) == 0)
112 if (volume_id_probe_udf(id, off) == 0)
115 if (volume_id_probe_iso9660(id, off) == 0)
118 if (volume_id_probe_hfs_hfsplus(id, off) == 0)
121 if (volume_id_probe_ufs(id, off) == 0)
124 if (volume_id_probe_ntfs(id, off) == 0)
127 if (volume_id_probe_cramfs(id, off) == 0)
130 if (volume_id_probe_romfs(id, off) == 0)
133 if (volume_id_probe_hpfs(id, off) == 0)
136 if (volume_id_probe_sysv(id, off) == 0)
142 /* If the filestystem in recognized, we free the allocated buffers,
143 otherwise they will stay in place for the possible next probe call */
144 volume_id_free_buffer(id);
149 /* open volume by already open file descriptor */
150 struct volume_id *volume_id_open_fd(int fd)
152 struct volume_id *id;
154 id = malloc(sizeof(struct volume_id));
157 memset(id, 0x00, sizeof(struct volume_id));
164 /* open volume by device node */
165 struct volume_id *volume_id_open_node(const char *path)
167 struct volume_id *id;
170 fd = open(path, O_RDONLY);
172 dbg("unable to open '%s'", path);
176 id = volume_id_open_fd(fd);
180 /* close fd on device close */
186 /* open volume by major/minor */
187 struct volume_id *volume_id_open_dev_t(dev_t devt)
189 struct volume_id *id;
190 __u8 tmp_node[VOLUME_ID_PATH_MAX];
192 snprintf(tmp_node, VOLUME_ID_PATH_MAX,
193 "/dev/.volume_id-%u-%u-%u", getpid(), major(devt), minor(devt));
194 tmp_node[VOLUME_ID_PATH_MAX] = '\0';
196 /* create tempory node to open the block device */
198 if (mknod(tmp_node, (S_IFBLK | 0600), devt) != 0)
201 id = volume_id_open_node(tmp_node);
208 void volume_id_close(struct volume_id *id)
213 if (id->fd_close != 0)
216 volume_id_free_buffer(id);
218 if (id->partitions != NULL)
219 free(id->partitions);