| 1 | /*
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| 2 | * volume_id - reads filesystem label and uuid
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| 3 | *
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| 4 | * Copyright (C) 2005 Kay Sievers <kay.sievers@vrfy.org>
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| 5 | *
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| 6 | * This library is free software; you can redistribute it and/or
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| 7 | * modify it under the terms of the GNU Lesser General Public
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| 8 | * License as published by the Free Software Foundation; either
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| 9 | * version 2.1 of the License, or (at your option) any later version.
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| 10 | *
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| 11 | * This library is distributed in the hope that it will be useful,
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| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 14 | * Lesser General Public License for more details.
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| 15 | *
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| 16 | * You should have received a copy of the GNU Lesser General Public
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| 17 | * License along with this library; if not, write to the Free Software
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| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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| 19 | */
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| 20 |
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| 21 | //kbuild:### lib-$(CONFIG_FEATURE_VOLUMEID_MINIX) += minix.o
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| 22 |
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| 23 | //config:
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| 24 | //config:### config FEATURE_VOLUMEID_MINIX
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| 25 | //config:### bool "minix filesystem"
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| 26 | //config:### default y
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| 27 | //config:### depends on VOLUMEID
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| 28 | //config:### help
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| 29 | //config:### TODO
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| 30 | //config:
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| 31 |
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| 32 | #include "volume_id_internal.h"
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| 33 |
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| 34 | struct minix_super_block {
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| 35 | uint16_t s_ninodes;
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| 36 | uint16_t s_nzones;
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| 37 | uint16_t s_imap_blocks;
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| 38 | uint16_t s_zmap_blocks;
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| 39 | uint16_t s_firstdatazone;
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| 40 | uint16_t s_log_zone_size;
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| 41 | uint32_t s_max_size;
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| 42 | uint16_t s_magic;
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| 43 | uint16_t s_state;
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| 44 | uint32_t s_zones;
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| 45 | } PACKED;
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| 46 |
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| 47 | #define MINIX_SUPERBLOCK_OFFSET 0x400
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| 48 |
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| 49 | int FAST_FUNC volume_id_probe_minix(struct volume_id *id, uint64_t off)
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| 50 | {
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| 51 | struct minix_super_block *ms;
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| 52 |
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| 53 | dbg("probing at offset 0x%llx", (unsigned long long) off);
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| 54 |
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| 55 | ms = volume_id_get_buffer(id, off + MINIX_SUPERBLOCK_OFFSET, 0x200);
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| 56 | if (ms == NULL)
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| 57 | return -1;
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| 58 |
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| 59 | if (ms->s_magic == cpu_to_le16(0x137f)) {
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| 60 | // id->type_version[0] = '1';
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| 61 | goto found;
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| 62 | }
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| 63 |
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| 64 | if (ms->s_magic == cpu_to_le16(0x1387)) {
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| 65 | // id->type_version[0] = '1';
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| 66 | goto found;
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| 67 | }
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| 68 |
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| 69 | if (ms->s_magic == cpu_to_le16(0x2468)) {
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| 70 | // id->type_version[0] = '2';
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| 71 | goto found;
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| 72 | }
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| 73 |
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| 74 | if (ms->s_magic == cpu_to_le16(0x2478)) {
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| 75 | // id->type_version[0] = '2';
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| 76 | goto found;
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| 77 | }
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| 78 |
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| 79 | return -1;
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| 80 |
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| 81 | found:
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| 82 | // id->type_version[1] = '\0';
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| 83 | // volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
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| 84 | // id->type = "minix";
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| 85 | return 0;
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| 86 | }
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