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
35 #include <asm/types.h>
37 #include "volume_id.h"
42 #define SYSV_NICINOD 100
43 #define SYSV_NICFREE 50
52 __u32 s_free[SYSV_NICFREE];
55 __u16 s_inode[SYSV_NICINOD];
71 } __attribute__((__packed__));
73 #define XENIX_NICINOD 100
74 #define XENIX_NICFREE 100
80 __u32 s_free[XENIX_NICFREE];
82 __u16 s_inode[XENIX_NICINOD];
97 } __attribute__((__packed__));
99 #define SYSV_SUPERBLOCK_BLOCK 0x01
100 #define SYSV_MAGIC 0xfd187e20
101 #define XENIX_SUPERBLOCK_BLOCK 0x18
102 #define XENIX_MAGIC 0x2b5544
103 #define SYSV_MAX_BLOCKSIZE 0x800
105 int volume_id_probe_sysv(struct volume_id *id, __u64 off)
107 struct sysv_super *vs;
108 struct xenix_super *xs;
111 dbg("probing at offset %llu", off);
113 for (boff = 0x200; boff <= SYSV_MAX_BLOCKSIZE; boff <<= 1) {
114 vs = (struct sysv_super *)
115 volume_id_get_buffer(id, off + (boff * SYSV_SUPERBLOCK_BLOCK), 0x200);
119 if (vs->s_magic == cpu_to_le32(SYSV_MAGIC) || vs->s_magic == cpu_to_be32(SYSV_MAGIC)) {
120 volume_id_set_label_raw(id, vs->s_fname, 6);
121 volume_id_set_label_string(id, vs->s_fname, 6);
127 for (boff = 0x200; boff <= SYSV_MAX_BLOCKSIZE; boff <<= 1) {
128 xs = (struct xenix_super *)
129 volume_id_get_buffer(id, off + (boff + XENIX_SUPERBLOCK_BLOCK), 0x200);
133 if (xs->s_magic == cpu_to_le32(XENIX_MAGIC) || xs->s_magic == cpu_to_be32(XENIX_MAGIC)) {
134 volume_id_set_label_raw(id, xs->s_fname, 6);
135 volume_id_set_label_string(id, xs->s_fname, 6);
144 volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);