| 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_SYSV) += sysv.o
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| 22 |
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| 23 | //config:
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| 24 | //config:config FEATURE_VOLUMEID_SYSV
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| 25 | //config: bool "sysv 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 | #define SYSV_NICINOD 100
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| 35 | #define SYSV_NICFREE 50
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| 36 |
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| 37 | struct sysv_super {
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| 38 | uint16_t s_isize;
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| 39 | uint16_t s_pad0;
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| 40 | uint32_t s_fsize;
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| 41 | uint16_t s_nfree;
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| 42 | uint16_t s_pad1;
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| 43 | uint32_t s_free[SYSV_NICFREE];
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| 44 | uint16_t s_ninode;
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| 45 | uint16_t s_pad2;
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| 46 | uint16_t s_inode[SYSV_NICINOD];
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| 47 | uint8_t s_flock;
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| 48 | uint8_t s_ilock;
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| 49 | uint8_t s_fmod;
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| 50 | uint8_t s_ronly;
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| 51 | uint32_t s_time;
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| 52 | uint16_t s_dinfo[4];
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| 53 | uint32_t s_tfree;
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| 54 | uint16_t s_tinode;
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| 55 | uint16_t s_pad3;
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| 56 | uint8_t s_fname[6];
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| 57 | uint8_t s_fpack[6];
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| 58 | uint32_t s_fill[12];
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| 59 | uint32_t s_state;
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| 60 | uint32_t s_magic;
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| 61 | uint32_t s_type;
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| 62 | } PACKED;
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| 63 |
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| 64 | #define XENIX_NICINOD 100
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| 65 | #define XENIX_NICFREE 100
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| 66 |
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| 67 | struct xenix_super {
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| 68 | uint16_t s_isize;
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| 69 | uint32_t s_fsize;
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| 70 | uint16_t s_nfree;
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| 71 | uint32_t s_free[XENIX_NICFREE];
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| 72 | uint16_t s_ninode;
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| 73 | uint16_t s_inode[XENIX_NICINOD];
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| 74 | uint8_t s_flock;
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| 75 | uint8_t s_ilock;
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| 76 | uint8_t s_fmod;
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| 77 | uint8_t s_ronly;
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| 78 | uint32_t s_time;
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| 79 | uint32_t s_tfree;
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| 80 | uint16_t s_tinode;
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| 81 | uint16_t s_dinfo[4];
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| 82 | uint8_t s_fname[6];
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| 83 | uint8_t s_fpack[6];
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| 84 | uint8_t s_clean;
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| 85 | uint8_t s_fill[371];
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| 86 | uint32_t s_magic;
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| 87 | uint32_t s_type;
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| 88 | } PACKED;
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| 89 |
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| 90 | #define SYSV_SUPERBLOCK_BLOCK 0x01
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| 91 | #define SYSV_MAGIC 0xfd187e20
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| 92 | #define XENIX_SUPERBLOCK_BLOCK 0x18
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| 93 | #define XENIX_MAGIC 0x2b5544
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| 94 | #define SYSV_MAX_BLOCKSIZE 0x800
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| 95 |
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| 96 | int FAST_FUNC volume_id_probe_sysv(struct volume_id *id /*,uint64_t off*/)
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| 97 | {
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| 98 | #define off ((uint64_t)0)
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| 99 | struct sysv_super *vs;
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| 100 | struct xenix_super *xs;
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| 101 | unsigned boff;
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| 102 |
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| 103 | dbg("probing at offset 0x%llx", (unsigned long long) off);
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| 104 |
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| 105 | for (boff = 0x200; boff <= SYSV_MAX_BLOCKSIZE; boff <<= 1) {
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| 106 | vs = volume_id_get_buffer(id, off + (boff * SYSV_SUPERBLOCK_BLOCK), 0x200);
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| 107 | if (vs == NULL)
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| 108 | return -1;
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| 109 |
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| 110 | if (vs->s_magic == cpu_to_le32(SYSV_MAGIC) || vs->s_magic == cpu_to_be32(SYSV_MAGIC)) {
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| 111 | // volume_id_set_label_raw(id, vs->s_fname, 6);
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| 112 | volume_id_set_label_string(id, vs->s_fname, 6);
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| 113 | IF_FEATURE_BLKID_TYPE(id->type = "sysv");
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| 114 | goto found;
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| 115 | }
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| 116 | }
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| 117 |
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| 118 | for (boff = 0x200; boff <= SYSV_MAX_BLOCKSIZE; boff <<= 1) {
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| 119 | xs = volume_id_get_buffer(id, off + (boff + XENIX_SUPERBLOCK_BLOCK), 0x200);
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| 120 | if (xs == NULL)
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| 121 | return -1;
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| 122 |
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| 123 | if (xs->s_magic == cpu_to_le32(XENIX_MAGIC) || xs->s_magic == cpu_to_be32(XENIX_MAGIC)) {
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| 124 | // volume_id_set_label_raw(id, xs->s_fname, 6);
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| 125 | volume_id_set_label_string(id, xs->s_fname, 6);
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| 126 | IF_FEATURE_BLKID_TYPE(id->type = "xenix";)
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| 127 | goto found;
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| 128 | }
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| 129 | }
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| 130 |
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| 131 | return -1;
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| 132 |
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| 133 | found:
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| 134 | // volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
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| 135 | return 0;
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| 136 | }
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