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/erofs.c | 73 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 73 insertions(+) create mode 100644 libblkid/src/superblocks/erofs.c (limited to 'libblkid/src/superblocks/erofs.c') diff --git a/libblkid/src/superblocks/erofs.c b/libblkid/src/superblocks/erofs.c new file mode 100644 index 0000000..0e7b422 --- /dev/null +++ b/libblkid/src/superblocks/erofs.c @@ -0,0 +1,73 @@ +/* + * Copyright (C) 2020 Gao Xiang + * + * This file may be redistributed under the terms of the + * GNU Lesser General Public License + */ +#include +#include + +#include "superblocks.h" + +#define EROFS_SUPER_OFFSET 1024 +#define EROFS_SB_KBOFF (EROFS_SUPER_OFFSET >> 10) + +#define EROFS_SUPER_MAGIC_V1 "\xe2\xe1\xf5\xe0" +#define EROFS_MAGIC_OFF 0 + +/* All in little-endian */ +struct erofs_super_block { + uint32_t magic; + uint32_t checksum; + uint32_t feature_compat; + uint8_t blkszbits; + uint8_t reserved; + + uint16_t root_nid; + uint64_t inos; + + uint64_t build_time; + uint32_t build_time_nsec; + uint32_t blocks; + uint32_t meta_blkaddr; + uint32_t xattr_blkaddr; + uint8_t uuid[16]; + uint8_t volume_name[16]; + uint32_t feature_incompat; + uint8_t reserved2[44]; +}; + +static int probe_erofs(blkid_probe pr, const struct blkid_idmag *mag) +{ + struct erofs_super_block *sb; + + sb = blkid_probe_get_sb(pr, mag, struct erofs_super_block); + if (!sb) + return errno ? -errno : BLKID_PROBE_NONE; + + if (sb->volume_name[0]) + blkid_probe_set_label(pr, (unsigned char *)sb->volume_name, + sizeof(sb->volume_name)); + + blkid_probe_set_uuid(pr, sb->uuid); + + if (sb->blkszbits < 32) + blkid_probe_set_block_size(pr, 1U << sb->blkszbits); + return BLKID_PROBE_OK; +} + +const struct blkid_idinfo erofs_idinfo = +{ + .name = "erofs", + .usage = BLKID_USAGE_FILESYSTEM, + .probefunc = probe_erofs, + .magics = + { + { + .magic = EROFS_SUPER_MAGIC_V1, + .len = 4, + .kboff = EROFS_SB_KBOFF, + .sboff = EROFS_MAGIC_OFF, + }, { NULL } + } +}; -- cgit v1.2.3