--- /dev/null
+/*
+ * Copyright (C) 2008 Karel Zak <kzak@redhat.com>
+ *
+ * Inspired by libvolume_id by
+ * Kay Sievers <kay.sievers@vrfy.org>
+ *
+ * This file may be redistributed under the terms of the
+ * GNU Lesser General Public License.
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdint.h>
+
+#include "bitops.h" /* swab16() */
+#include "superblocks.h"
+
+#include "md5.h"
+
+struct squashfs_super_block {
+ uint32_t s_magic;
+ uint32_t inodes;
+ uint32_t mkfs_time;
+ uint32_t block_size;
+ uint32_t fragments;
+ uint16_t compression;
+ uint16_t block_log;
+ uint16_t flags;
+ uint16_t no_ids;
+ uint16_t s_major;
+ uint16_t s_minor;
+ uint64_t root_inode;
+ uint64_t bytes_used;
+ uint64_t id_table_start;
+ uint64_t xattr_id_table_start;
+ uint64_t inode_table_start;
+ uint64_t directory_table_start;
+ uint64_t fragment_table_start;
+ uint64_t lookup_table_start;
+} __attribute__((packed));
+
+static int probe_squashfs(blkid_probe pr, const struct blkid_idmag *mag)
+{
+ md5_ctx_t ctx = { 0 };
+ uint8_t md5[4];
+ struct squashfs_super_block *sq;
+
+ sq = blkid_probe_get_sb(pr, mag, struct squashfs_super_block);
+ if (!sq)
+ return -1;
+
+ if (strcmp(mag->magic, "sqsh") == 0 ||
+ strcmp(mag->magic, "qshs") == 0)
+ blkid_probe_sprintf_version(pr, "%u.%u",
+ sq->s_major,
+ sq->s_minor);
+ else
+ blkid_probe_sprintf_version(pr, "%u.%u",
+ swab16(sq->s_major),
+ swab16(sq->s_minor));
+ md5_begin(&ctx);
+ md5_hash(sq, sizeof(*sq), &ctx);
+ md5_end(&md5, &ctx);
+ blkid_probe_sprintf_uuid(pr, NULL, 4, "%02x%02x-%02x%02x",
+ md5[3], md5[2], md5[1], md5[0]);
+ return 0;
+}
+
+const struct blkid_idinfo squashfs_idinfo =
+{
+ .name = "squashfs",
+ .usage = BLKID_USAGE_FILESYSTEM,
+ .probefunc = probe_squashfs,
+ .magics =
+ {
+ { .magic = "sqsh", .len = 4 },
+ { .magic = "hsqs", .len = 4 }, /* swap */
+
+ /* LZMA version */
+ { .magic = "qshs", .len = 4 },
+ { .magic = "shsq", .len = 4 }, /* swap */
+ { NULL }
+ }
+};
+
+