[2725] | 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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[3621] | 21 | //kbuild:lib-$(CONFIG_VOLUMEID) += volume_id.o util.o
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| 22 |
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[2725] | 23 | #include "volume_id_internal.h"
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| 24 |
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| 25 |
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| 26 | /* Some detection routines do not set label or uuid anyway,
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| 27 | * so they are disabled. */
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| 28 |
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| 29 | /* Looks for partitions, we don't use it: */
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| 30 | #define ENABLE_FEATURE_VOLUMEID_MAC 0
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| 31 | /* #define ENABLE_FEATURE_VOLUMEID_MSDOS 0 - NB: this one
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| 32 | * was not properly added to probe table anyway - ??! */
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| 33 |
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| 34 | /* None of RAIDs have label or uuid, except LinuxRAID: */
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| 35 | #define ENABLE_FEATURE_VOLUMEID_HIGHPOINTRAID 0
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| 36 | #define ENABLE_FEATURE_VOLUMEID_ISWRAID 0
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| 37 | #define ENABLE_FEATURE_VOLUMEID_LSIRAID 0
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| 38 | #define ENABLE_FEATURE_VOLUMEID_LVM 0
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| 39 | #define ENABLE_FEATURE_VOLUMEID_NVIDIARAID 0
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| 40 | #define ENABLE_FEATURE_VOLUMEID_PROMISERAID 0
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| 41 | #define ENABLE_FEATURE_VOLUMEID_SILICONRAID 0
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| 42 | #define ENABLE_FEATURE_VOLUMEID_VIARAID 0
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| 43 |
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| 44 | /* These filesystems also have no label or uuid: */
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| 45 | #define ENABLE_FEATURE_VOLUMEID_MINIX 0
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| 46 | #define ENABLE_FEATURE_VOLUMEID_HPFS 0
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| 47 | #define ENABLE_FEATURE_VOLUMEID_UFS 0
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| 48 |
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| 49 |
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| 50 | typedef int FAST_FUNC (*raid_probe_fptr)(struct volume_id *id, /*uint64_t off,*/ uint64_t size);
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| 51 | typedef int FAST_FUNC (*probe_fptr)(struct volume_id *id /*, uint64_t off*/);
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| 52 |
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| 53 | static const raid_probe_fptr raid1[] = {
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| 54 | #if ENABLE_FEATURE_VOLUMEID_LINUXRAID
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| 55 | volume_id_probe_linux_raid,
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| 56 | #endif
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| 57 | #if ENABLE_FEATURE_VOLUMEID_ISWRAID
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| 58 | volume_id_probe_intel_software_raid,
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| 59 | #endif
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| 60 | #if ENABLE_FEATURE_VOLUMEID_LSIRAID
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| 61 | volume_id_probe_lsi_mega_raid,
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| 62 | #endif
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| 63 | #if ENABLE_FEATURE_VOLUMEID_VIARAID
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| 64 | volume_id_probe_via_raid,
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| 65 | #endif
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| 66 | #if ENABLE_FEATURE_VOLUMEID_SILICONRAID
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| 67 | volume_id_probe_silicon_medley_raid,
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| 68 | #endif
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| 69 | #if ENABLE_FEATURE_VOLUMEID_NVIDIARAID
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| 70 | volume_id_probe_nvidia_raid,
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| 71 | #endif
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| 72 | #if ENABLE_FEATURE_VOLUMEID_PROMISERAID
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| 73 | volume_id_probe_promise_fasttrack_raid,
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| 74 | #endif
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| 75 | #if ENABLE_FEATURE_VOLUMEID_HIGHPOINTRAID
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| 76 | volume_id_probe_highpoint_45x_raid,
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| 77 | #endif
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| 78 | };
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| 79 |
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| 80 | static const probe_fptr raid2[] = {
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| 81 | #if ENABLE_FEATURE_VOLUMEID_LVM
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| 82 | volume_id_probe_lvm1,
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| 83 | volume_id_probe_lvm2,
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| 84 | #endif
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| 85 | #if ENABLE_FEATURE_VOLUMEID_HIGHPOINTRAID
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| 86 | volume_id_probe_highpoint_37x_raid,
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| 87 | #endif
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| 88 | #if ENABLE_FEATURE_VOLUMEID_LUKS
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| 89 | volume_id_probe_luks,
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| 90 | #endif
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| 91 | };
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| 92 |
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| 93 | /* signature in the first block, only small buffer needed */
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| 94 | static const probe_fptr fs1[] = {
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| 95 | #if ENABLE_FEATURE_VOLUMEID_FAT
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| 96 | volume_id_probe_vfat,
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| 97 | #endif
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[3232] | 98 | #if ENABLE_FEATURE_VOLUMEID_EXFAT
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| 99 | volume_id_probe_exfat,
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| 100 | #endif
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[2725] | 101 | #if ENABLE_FEATURE_VOLUMEID_MAC
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| 102 | volume_id_probe_mac_partition_map,
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| 103 | #endif
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[3232] | 104 | #if ENABLE_FEATURE_VOLUMEID_SQUASHFS
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| 105 | volume_id_probe_squashfs,
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| 106 | #endif
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[2725] | 107 | #if ENABLE_FEATURE_VOLUMEID_XFS
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| 108 | volume_id_probe_xfs,
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| 109 | #endif
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[3621] | 110 | #if ENABLE_FEATURE_VOLUMEID_BCACHE
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| 111 | volume_id_probe_bcache,
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| 112 | #endif
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[2725] | 113 | };
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| 114 |
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| 115 | /* fill buffer with maximum */
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| 116 | static const probe_fptr fs2[] = {
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| 117 | #if ENABLE_FEATURE_VOLUMEID_LINUXSWAP
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| 118 | volume_id_probe_linux_swap,
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| 119 | #endif
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| 120 | #if ENABLE_FEATURE_VOLUMEID_EXT
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| 121 | volume_id_probe_ext,
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| 122 | #endif
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| 123 | #if ENABLE_FEATURE_VOLUMEID_BTRFS
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| 124 | volume_id_probe_btrfs,
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| 125 | #endif
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| 126 | #if ENABLE_FEATURE_VOLUMEID_REISERFS
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| 127 | volume_id_probe_reiserfs,
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| 128 | #endif
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| 129 | #if ENABLE_FEATURE_VOLUMEID_JFS
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| 130 | volume_id_probe_jfs,
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| 131 | #endif
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| 132 | #if ENABLE_FEATURE_VOLUMEID_UDF
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| 133 | volume_id_probe_udf,
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| 134 | #endif
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| 135 | #if ENABLE_FEATURE_VOLUMEID_ISO9660
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| 136 | volume_id_probe_iso9660,
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| 137 | #endif
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| 138 | #if ENABLE_FEATURE_VOLUMEID_HFS
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| 139 | volume_id_probe_hfs_hfsplus,
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| 140 | #endif
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| 141 | #if ENABLE_FEATURE_VOLUMEID_UFS
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| 142 | volume_id_probe_ufs,
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| 143 | #endif
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[3621] | 144 | #if ENABLE_FEATURE_VOLUMEID_F2FS
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| 145 | volume_id_probe_f2fs,
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| 146 | #endif
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[3232] | 147 | #if ENABLE_FEATURE_VOLUMEID_NILFS
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| 148 | volume_id_probe_nilfs,
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| 149 | #endif
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[2725] | 150 | #if ENABLE_FEATURE_VOLUMEID_NTFS
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| 151 | volume_id_probe_ntfs,
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| 152 | #endif
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| 153 | #if ENABLE_FEATURE_VOLUMEID_CRAMFS
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| 154 | volume_id_probe_cramfs,
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| 155 | #endif
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| 156 | #if ENABLE_FEATURE_VOLUMEID_ROMFS
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| 157 | volume_id_probe_romfs,
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| 158 | #endif
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| 159 | #if ENABLE_FEATURE_VOLUMEID_HPFS
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| 160 | volume_id_probe_hpfs,
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| 161 | #endif
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| 162 | #if ENABLE_FEATURE_VOLUMEID_SYSV
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| 163 | volume_id_probe_sysv,
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| 164 | #endif
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| 165 | #if ENABLE_FEATURE_VOLUMEID_MINIX
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| 166 | volume_id_probe_minix,
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| 167 | #endif
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| 168 | #if ENABLE_FEATURE_VOLUMEID_OCFS2
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| 169 | volume_id_probe_ocfs2,
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| 170 | #endif
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| 171 | };
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| 172 |
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| 173 | int FAST_FUNC volume_id_probe_all(struct volume_id *id, /*uint64_t off,*/ uint64_t size)
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| 174 | {
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| 175 | unsigned i;
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| 176 |
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| 177 | /* probe for raid first, cause fs probes may be successful on raid members */
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| 178 | if (size) {
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| 179 | for (i = 0; i < ARRAY_SIZE(raid1); i++) {
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| 180 | if (raid1[i](id, /*off,*/ size) == 0)
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| 181 | goto ret;
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| 182 | if (id->error)
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| 183 | goto ret;
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| 184 | }
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| 185 | }
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| 186 |
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| 187 | for (i = 0; i < ARRAY_SIZE(raid2); i++) {
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| 188 | if (raid2[i](id /*,off*/) == 0)
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| 189 | goto ret;
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| 190 | if (id->error)
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| 191 | goto ret;
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| 192 | }
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| 193 |
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| 194 | /* signature in the first block, only small buffer needed */
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| 195 | for (i = 0; i < ARRAY_SIZE(fs1); i++) {
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| 196 | if (fs1[i](id /*,off*/) == 0)
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| 197 | goto ret;
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| 198 | if (id->error)
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| 199 | goto ret;
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| 200 | }
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| 201 |
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| 202 | /* fill buffer with maximum */
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| 203 | volume_id_get_buffer(id, 0, SB_BUFFER_SIZE);
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| 204 |
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| 205 | for (i = 0; i < ARRAY_SIZE(fs2); i++) {
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| 206 | if (fs2[i](id /*,off*/) == 0)
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| 207 | goto ret;
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| 208 | if (id->error)
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| 209 | goto ret;
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| 210 | }
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| 211 |
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| 212 | ret:
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| 213 | volume_id_free_buffer(id);
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| 214 | return (- id->error); /* 0 or -1 */
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| 215 | }
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| 216 |
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| 217 | /* open volume by device node */
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| 218 | struct volume_id* FAST_FUNC volume_id_open_node(int fd)
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| 219 | {
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| 220 | struct volume_id *id;
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| 221 |
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| 222 | id = xzalloc(sizeof(struct volume_id));
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| 223 | id->fd = fd;
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| 224 | ///* close fd on device close */
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| 225 | //id->fd_close = 1;
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| 226 | return id;
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| 227 | }
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| 228 |
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| 229 | #ifdef UNUSED
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| 230 | /* open volume by major/minor */
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| 231 | struct volume_id* FAST_FUNC volume_id_open_dev_t(dev_t devt)
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| 232 | {
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| 233 | struct volume_id *id;
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| 234 | char *tmp_node[VOLUME_ID_PATH_MAX];
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| 235 |
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| 236 | tmp_node = xasprintf("/dev/.volume_id-%u-%u-%u",
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| 237 | (unsigned)getpid(), (unsigned)major(devt), (unsigned)minor(devt));
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| 238 |
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| 239 | /* create temporary node to open block device */
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| 240 | unlink(tmp_node);
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| 241 | if (mknod(tmp_node, (S_IFBLK | 0600), devt) != 0)
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| 242 | bb_perror_msg_and_die("can't mknod(%s)", tmp_node);
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| 243 |
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| 244 | id = volume_id_open_node(tmp_node);
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| 245 | unlink(tmp_node);
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| 246 | free(tmp_node);
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| 247 | return id;
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| 248 | }
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| 249 | #endif
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| 250 |
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| 251 | void FAST_FUNC free_volume_id(struct volume_id *id)
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| 252 | {
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| 253 | if (id == NULL)
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| 254 | return;
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| 255 |
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| 256 | //if (id->fd_close != 0) - always true
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| 257 | close(id->fd);
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| 258 | volume_id_free_buffer(id);
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| 259 | #ifdef UNUSED_PARTITION_CODE
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| 260 | free(id->partitions);
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| 261 | #endif
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| 262 | free(id);
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| 263 | }
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