From 378c18e5f024ac5a8aef4cb40d7c9aa9633d144c Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 16:30:35 +0200 Subject: Adding upstream version 2.38.1. Signed-off-by: Daniel Baumann --- libblkid/src/superblocks/squashfs.c | 103 ++++++++++++++++++++++++++++++++++++ 1 file changed, 103 insertions(+) create mode 100644 libblkid/src/superblocks/squashfs.c (limited to 'libblkid/src/superblocks/squashfs.c') diff --git a/libblkid/src/superblocks/squashfs.c b/libblkid/src/superblocks/squashfs.c new file mode 100644 index 0000000..4db8424 --- /dev/null +++ b/libblkid/src/superblocks/squashfs.c @@ -0,0 +1,103 @@ +/* + * Copyright (C) 2008 Karel Zak + * + * Inspired by libvolume_id by + * Kay Sievers + * + * This file may be redistributed under the terms of the + * GNU Lesser General Public License. + */ +#include +#include +#include +#include +#include + +#include "bitops.h" /* swab16() */ +#include "superblocks.h" + +struct sqsh_super_block { + uint32_t s_magic; + uint32_t inodes; + uint32_t bytes_used_2; + uint32_t uid_start_2; + uint32_t guid_start_2; + uint32_t inode_table_start_2; + uint32_t directory_table_start_2; + uint16_t s_major; + uint16_t s_minor; +} __attribute__((packed)); + +static int probe_squashfs(blkid_probe pr, const struct blkid_idmag *mag) +{ + struct sqsh_super_block *sq; + uint16_t vermaj; + uint16_t vermin; + + sq = blkid_probe_get_sb(pr, mag, struct sqsh_super_block); + if (!sq) + return errno ? -errno : 1; + + vermaj = le16_to_cpu(sq->s_major); + vermin = le16_to_cpu(sq->s_minor); + if (vermaj < 4) + return 1; + + blkid_probe_sprintf_version(pr, "%u.%u", vermaj, vermin); + + return 0; +} + +static int probe_squashfs3(blkid_probe pr, const struct blkid_idmag *mag) +{ + struct sqsh_super_block *sq; + uint16_t vermaj; + uint16_t vermin; + + sq = blkid_probe_get_sb(pr, mag, struct sqsh_super_block); + if (!sq) + return errno ? -errno : 1; + + if (strcmp(mag->magic, "sqsh") == 0) { + vermaj = be16_to_cpu(sq->s_major); + vermin = be16_to_cpu(sq->s_minor); + } else { + vermaj = le16_to_cpu(sq->s_major); + vermin = le16_to_cpu(sq->s_minor); + } + + if (vermaj > 3) + return 1; + + blkid_probe_sprintf_version(pr, "%u.%u", vermaj, vermin); + + blkid_probe_set_block_size(pr, 1024); + + return 0; +} + +const struct blkid_idinfo squashfs_idinfo = +{ + .name = "squashfs", + .usage = BLKID_USAGE_FILESYSTEM, + .probefunc = probe_squashfs, + .magics = + { + { .magic = "hsqs", .len = 4 }, + { NULL } + } +}; + +const struct blkid_idinfo squashfs3_idinfo = +{ + .name = "squashfs3", + .usage = BLKID_USAGE_FILESYSTEM, + .probefunc = probe_squashfs3, + .magics = + { + { .magic = "sqsh", .len = 4 }, /* big endian */ + { .magic = "hsqs", .len = 4 }, /* little endian */ + { NULL } + } +}; + -- cgit v1.2.3