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.
26 #include "volume_id.h"
30 #define SYSV_NICINOD 100
31 #define SYSV_NICFREE 50
40 uint32_t s_free[SYSV_NICFREE];
43 uint16_t s_inode[SYSV_NICINOD];
61 #define XENIX_NICINOD 100
62 #define XENIX_NICFREE 100
68 uint32_t s_free[XENIX_NICFREE];
70 uint16_t s_inode[XENIX_NICINOD];
87 #define SYSV_SUPERBLOCK_BLOCK 0x01
88 #define SYSV_MAGIC 0xfd187e20
89 #define XENIX_SUPERBLOCK_BLOCK 0x18
90 #define XENIX_MAGIC 0x2b5544
91 #define SYSV_MAX_BLOCKSIZE 0x800
93 int volume_id_probe_sysv(struct volume_id *id, uint64_t off)
95 struct sysv_super *vs;
96 struct xenix_super *xs;
99 dbg("probing at offset 0x%llx", (unsigned long long) off);
101 for (boff = 0x200; boff <= SYSV_MAX_BLOCKSIZE; boff <<= 1) {
102 vs = (struct sysv_super *)
103 volume_id_get_buffer(id, off + (boff * SYSV_SUPERBLOCK_BLOCK), 0x200);
107 if (vs->s_magic == cpu_to_le32(SYSV_MAGIC) || vs->s_magic == cpu_to_be32(SYSV_MAGIC)) {
108 volume_id_set_label_raw(id, vs->s_fname, 6);
109 volume_id_set_label_string(id, vs->s_fname, 6);
115 for (boff = 0x200; boff <= SYSV_MAX_BLOCKSIZE; boff <<= 1) {
116 xs = (struct xenix_super *)
117 volume_id_get_buffer(id, off + (boff + XENIX_SUPERBLOCK_BLOCK), 0x200);
121 if (xs->s_magic == cpu_to_le32(XENIX_MAGIC) || xs->s_magic == cpu_to_be32(XENIX_MAGIC)) {
122 volume_id_set_label_raw(id, xs->s_fname, 6);
123 volume_id_set_label_string(id, xs->s_fname, 6);
132 volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);