2 * volume_id - reads filesystem label and uuid
4 * Copyright (C) 2005 Kay Sievers <kay.sievers@vrfy.org>
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation version 2 of the License.
29 #include "volume_id.h"
43 #include "highpoint.h"
47 #include "silicon_raid.h"
48 #include "nvidia_raid.h"
49 #include "promise_raid.h"
51 #include "linux_swap.h"
52 #include "linux_raid.h"
63 int volume_id_probe_all(struct volume_id *id, uint64_t off, uint64_t size)
68 /* probe for raid first, cause fs probes may be successful on raid members */
70 if (volume_id_probe_linux_raid(id, off, size) == 0)
73 if (volume_id_probe_intel_software_raid(id, off, size) == 0)
76 if (volume_id_probe_lsi_mega_raid(id, off, size) == 0)
79 if (volume_id_probe_via_raid(id, off, size) == 0)
82 if (volume_id_probe_silicon_medley_raid(id, off, size) == 0)
85 if (volume_id_probe_nvidia_raid(id, off, size) == 0)
88 if (volume_id_probe_promise_fasttrack_raid(id, off, size) == 0)
91 if (volume_id_probe_highpoint_45x_raid(id, off, size) == 0)
95 if (volume_id_probe_lvm1(id, off) == 0)
98 if (volume_id_probe_lvm2(id, off) == 0)
101 if (volume_id_probe_highpoint_37x_raid(id, off) == 0)
104 if (volume_id_probe_luks(id, off) == 0)
107 /* signature in the first block, only small buffer needed */
108 if (volume_id_probe_vfat(id, off) == 0)
111 if (volume_id_probe_xfs(id, off) == 0)
114 /* fill buffer with maximum */
115 volume_id_get_buffer(id, 0, SB_BUFFER_SIZE);
117 if (volume_id_probe_linux_swap(id, off) == 0)
120 if (volume_id_probe_ext(id, off) == 0)
123 if (volume_id_probe_reiserfs(id, off) == 0)
126 if (volume_id_probe_jfs(id, off) == 0)
129 if (volume_id_probe_udf(id, off) == 0)
132 if (volume_id_probe_iso9660(id, off) == 0)
135 if (volume_id_probe_hfs_hfsplus(id, off) == 0)
138 if (volume_id_probe_ufs(id, off) == 0)
141 if (volume_id_probe_ntfs(id, off) == 0)
144 if (volume_id_probe_cramfs(id, off) == 0)
147 if (volume_id_probe_romfs(id, off) == 0)
150 if (volume_id_probe_hpfs(id, off) == 0)
153 if (volume_id_probe_sysv(id, off) == 0)
156 if (volume_id_probe_minix(id, off) == 0)
159 if (volume_id_probe_ocfs1(id, off) == 0)
162 if (volume_id_probe_ocfs2(id, off) == 0)
165 if (volume_id_probe_vxfs(id, off) == 0)
171 /* If the filestystem in recognized, we free the allocated buffers,
172 otherwise they will stay in place for the possible next probe call */
173 volume_id_free_buffer(id);
178 /* open volume by already open file descriptor */
179 struct volume_id *volume_id_open_fd(int fd)
181 struct volume_id *id;
183 id = malloc(sizeof(struct volume_id));
186 memset(id, 0x00, sizeof(struct volume_id));
193 /* open volume by device node */
194 struct volume_id *volume_id_open_node(const char *path)
196 struct volume_id *id;
199 fd = open(path, O_RDONLY);
201 dbg("unable to open '%s'", path);
205 id = volume_id_open_fd(fd);
209 /* close fd on device close */
215 /* open volume by major/minor */
216 struct volume_id *volume_id_open_dev_t(dev_t devt)
218 struct volume_id *id;
219 char tmp_node[VOLUME_ID_PATH_MAX];
221 snprintf(tmp_node, VOLUME_ID_PATH_MAX,
222 "/dev/.volume_id-%u-%u-%u", getpid(), major(devt), minor(devt));
223 tmp_node[VOLUME_ID_PATH_MAX-1] = '\0';
225 /* create tempory node to open the block device */
227 if (mknod(tmp_node, (S_IFBLK | 0600), devt) != 0)
230 id = volume_id_open_node(tmp_node);
237 void volume_id_close(struct volume_id *id)
242 if (id->fd_close != 0)
245 volume_id_free_buffer(id);
247 if (id->partitions != NULL)
248 free(id->partitions);