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"
45 #include "reiserfs/reiserfs.h"
51 #include "ntfs/ntfs.h"
52 #include "iso9660/iso9660.h"
54 #include "highpoint/highpoint.h"
55 #include "linux_swap/linux_swap.h"
56 #include "linux_raid/linux_raid.h"
58 #include "cramfs/cramfs.h"
60 #include "msdos/msdos.h"
62 int volume_id_probe_all(struct volume_id *id, unsigned long long off, unsigned long long size)
67 /* probe for raid first, cause fs probes may be successful on raid members */
68 if (volume_id_probe_linux_raid(id, off, size) == 0)
71 if (volume_id_probe_lvm1(id, off) == 0)
74 if (volume_id_probe_lvm2(id, off) == 0)
77 if (volume_id_probe_highpoint_ataraid(id, off) == 0)
80 /* signature in the first block, only small buffer needed */
81 if (volume_id_probe_vfat(id, off) == 0)
84 if (volume_id_probe_mac_partition_map(id, off) == 0)
87 if (volume_id_probe_xfs(id, off) == 0)
90 /* fill buffer with maximum */
91 volume_id_get_buffer(id, 0, SB_BUFFER_SIZE);
93 if (volume_id_probe_linux_swap(id, off) == 0)
96 if (volume_id_probe_ext(id, off) == 0)
99 if (volume_id_probe_reiserfs(id, off) == 0)
102 if (volume_id_probe_jfs(id, off) == 0)
105 if (volume_id_probe_udf(id, off) == 0)
108 if (volume_id_probe_iso9660(id, off) == 0)
111 if (volume_id_probe_hfs_hfsplus(id, off) == 0)
114 if (volume_id_probe_ufs(id, off) == 0)
117 if (volume_id_probe_ntfs(id, off) == 0)
120 if (volume_id_probe_cramfs(id, off) == 0)
126 /* If the filestystem in recognized, we free the allocated buffers,
127 otherwise they will stay in place for the possible next probe call */
128 volume_id_free_buffer(id);
133 /* open volume by already open file descriptor */
134 struct volume_id *volume_id_open_fd(int fd)
136 struct volume_id *id;
138 id = malloc(sizeof(struct volume_id));
141 memset(id, 0x00, sizeof(struct volume_id));
148 /* open volume by device node */
149 struct volume_id *volume_id_open_node(const char *path)
151 struct volume_id *id;
154 fd = open(path, O_RDONLY);
156 dbg("unable to open '%s'", path);
160 id = volume_id_open_fd(fd);
164 /* close fd on device close */
170 /* open volume by major/minor */
171 struct volume_id *volume_id_open_dev_t(dev_t devt)
173 struct volume_id *id;
174 __u8 tmp_node[VOLUME_ID_PATH_MAX];
176 snprintf(tmp_node, VOLUME_ID_PATH_MAX,
177 "/dev/.volume_id-%u-%u-%u", getpid(), major(devt), minor(devt));
178 tmp_node[VOLUME_ID_PATH_MAX] = '\0';
180 /* create tempory node to open the block device */
182 if (mknod(tmp_node, (S_IFBLK | 0600), devt) != 0)
185 id = volume_id_open_node(tmp_node);
192 void volume_id_close(struct volume_id *id)
197 if (id->fd_close != 0)
200 volume_id_free_buffer(id);
202 if (id->partitions != NULL)
203 free(id->partitions);