1 /*
2  * volume_id - reads filesystem label and uuid
3  *
4  * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
5  *
6  *	This library is free software; you can redistribute it and/or
7  *	modify it under the terms of the GNU Lesser General Public
8  *	License as published by the Free Software Foundation; either
9  *	version 2.1 of the License, or (at your option) any later version.
10  *
11  *	This library is distributed in the hope that it will be useful,
12  *	but WITHOUT ANY WARRANTY; without even the implied warranty of
13  *	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  *	Lesser General Public License for more details.
15  *
16  *	You should have received a copy of the GNU Lesser General Public
17  *	License along with this library; if not, write to the Free Software
18  *	Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19  */
20 //config:config FEATURE_VOLUMEID_ROMFS
21 //config:	bool "romfs filesystem"
22 //config:	default y
23 //config:	depends on VOLUMEID
24 
25 //kbuild:lib-$(CONFIG_FEATURE_VOLUMEID_ROMFS) += romfs.o
26 
27 #include "volume_id_internal.h"
28 
29 struct romfs_super {
30 	uint8_t magic[8];
31 	uint32_t size;
32 	uint32_t checksum;
33 	uint8_t name[];
34 } PACKED;
35 
volume_id_probe_romfs(struct volume_id * id)36 int FAST_FUNC volume_id_probe_romfs(struct volume_id *id /*,uint64_t off*/)
37 {
38 #define off ((uint64_t)0)
39 	struct romfs_super *rfs;
40 
41 	dbg("probing at offset 0x%llx", (unsigned long long) off);
42 
43 	rfs = volume_id_get_buffer(id, off, 0x200);
44 	if (rfs == NULL)
45 		return -1;
46 
47 	if (memcmp(rfs->magic, "-rom1fs-", 4) == 0) {
48 		size_t len = strlen((char *)rfs->name);
49 
50 		if (len) {
51 //			volume_id_set_label_raw(id, rfs->name, len);
52 			volume_id_set_label_string(id, rfs->name, len);
53 		}
54 
55 //		volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
56 		IF_FEATURE_BLKID_TYPE(id->type = "romfs";)
57 		return 0;
58 	}
59 
60 	return -1;
61 }
62