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"
27 #include "libvolume_id-private.h"
30 #define SQUASHFS_MAGIC 0x73717368
31 #define SQUASHFS_MAGIC_LZMA 0x71736873
33 struct squashfs_super {
36 uint32_t bytes_used_2;
38 uint32_t guid_start_2;
39 uint32_t inode_table_start_2;
40 uint32_t directory_table_start_2;
45 int volume_id_probe_squashfs(struct volume_id *id, uint64_t off, uint64_t size)
47 struct squashfs_super *sqs;
49 info("probing at offset 0x%llx\n", (unsigned long long) off);
51 sqs = (struct squashfs_super *) volume_id_get_buffer(id, off, 0x200);
55 if (sqs->s_magic == SQUASHFS_MAGIC || sqs->s_magic == SQUASHFS_MAGIC_LZMA) {
56 snprintf(id->type_version, sizeof(id->type_version), "%u.%u",
57 sqs->s_major, sqs->s_minor);
60 if (sqs->s_magic == bswap_32(SQUASHFS_MAGIC) || sqs->s_magic == bswap_32(SQUASHFS_MAGIC_LZMA)) {
61 snprintf(id->type_version, sizeof(id->type_version), "%u.%u",
62 bswap_16(sqs->s_major), bswap_16(sqs->s_minor));
69 volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
70 id->type = "squashfs";