2 * volume_id - reads filesystem label and uuid
4 * Copyright (C) 2006 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 "libvolume_id.h"
29 #define SQUASHFS_MAGIC 0x73717368
30 #define SQUASHFS_MAGIC_LZMA 0x71736873
32 struct squashfs_super {
35 uint32_t bytes_used_2;
37 uint32_t guid_start_2;
38 uint32_t inode_table_start_2;
39 uint32_t directory_table_start_2;
44 int volume_id_probe_squashfs(struct volume_id *id, uint64_t off, uint64_t size)
46 struct squashfs_super *sqs;
48 info("probing at offset 0x%llx\n", (unsigned long long) off);
50 sqs = (struct squashfs_super *) volume_id_get_buffer(id, off, 0x200);
54 if (sqs->s_magic == SQUASHFS_MAGIC || sqs->s_magic == SQUASHFS_MAGIC_LZMA) {
55 snprintf(id->type_version, sizeof(id->type_version), "%u.%u",
56 sqs->s_major, sqs->s_minor);
59 if (sqs->s_magic == bswap_32(SQUASHFS_MAGIC) || sqs->s_magic == bswap_32(SQUASHFS_MAGIC_LZMA)) {
60 snprintf(id->type_version, sizeof(id->type_version), "%u.%u",
61 bswap_16(sqs->s_major), bswap_16(sqs->s_minor));
68 volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
69 id->type = "squashfs";