1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd. 4 */ 5 6 #include <linux/string.h> 7 #include <linux/slab.h> 8 #include <linux/buffer_head.h> 9 #include <asm/unaligned.h> 10 11 #include "exfat_raw.h" 12 #include "exfat_fs.h" 13 14 /* Upcase table macro */ 15 #define EXFAT_NUM_UPCASE (2918) 16 #define UTBL_COUNT (0x10000) 17 18 /* 19 * Upcase table in compressed format (7.2.5.1 Recommended Up-case Table 20 * in exfat specification, See: 21 * https://docs.microsoft.com/en-us/windows/win32/fileio/exfat-specification). 22 */ 23 static const unsigned short uni_def_upcase[EXFAT_NUM_UPCASE] = { 24 0x0000, 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007, 25 0x0008, 0x0009, 0x000a, 0x000b, 0x000c, 0x000d, 0x000e, 0x000f, 26 0x0010, 0x0011, 0x0012, 0x0013, 0x0014, 0x0015, 0x0016, 0x0017, 27 0x0018, 0x0019, 0x001a, 0x001b, 0x001c, 0x001d, 0x001e, 0x001f, 28 0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027, 29 0x0028, 0x0029, 0x002a, 0x002b, 0x002c, 0x002d, 0x002e, 0x002f, 30 0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037, 31 0x0038, 0x0039, 0x003a, 0x003b, 0x003c, 0x003d, 0x003e, 0x003f, 32 0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047, 33 0x0048, 0x0049, 0x004a, 0x004b, 0x004c, 0x004d, 0x004e, 0x004f, 34 0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057, 35 0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x005f, 36 0x0060, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047, 37 0x0048, 0x0049, 0x004a, 0x004b, 0x004c, 0x004d, 0x004e, 0x004f, 38 0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057, 39 0x0058, 0x0059, 0x005a, 0x007b, 0x007c, 0x007d, 0x007e, 0x007f, 40 0x0080, 0x0081, 0x0082, 0x0083, 0x0084, 0x0085, 0x0086, 0x0087, 41 0x0088, 0x0089, 0x008a, 0x008b, 0x008c, 0x008d, 0x008e, 0x008f, 42 0x0090, 0x0091, 0x0092, 0x0093, 0x0094, 0x0095, 0x0096, 0x0097, 43 0x0098, 0x0099, 0x009a, 0x009b, 0x009c, 0x009d, 0x009e, 0x009f, 44 0x00a0, 0x00a1, 0x00a2, 0x00a3, 0x00a4, 0x00a5, 0x00a6, 0x00a7, 45 0x00a8, 0x00a9, 0x00aa, 0x00ab, 0x00ac, 0x00ad, 0x00ae, 0x00af, 46 0x00b0, 0x00b1, 0x00b2, 0x00b3, 0x00b4, 0x00b5, 0x00b6, 0x00b7, 47 0x00b8, 0x00b9, 0x00ba, 0x00bb, 0x00bc, 0x00bd, 0x00be, 0x00bf, 48 0x00c0, 0x00c1, 0x00c2, 0x00c3, 0x00c4, 0x00c5, 0x00c6, 0x00c7, 49 0x00c8, 0x00c9, 0x00ca, 0x00cb, 0x00cc, 0x00cd, 0x00ce, 0x00cf, 50 0x00d0, 0x00d1, 0x00d2, 0x00d3, 0x00d4, 0x00d5, 0x00d6, 0x00d7, 51 0x00d8, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x00dd, 0x00de, 0x00df, 52 0x00c0, 0x00c1, 0x00c2, 0x00c3, 0x00c4, 0x00c5, 0x00c6, 0x00c7, 53 0x00c8, 0x00c9, 0x00ca, 0x00cb, 0x00cc, 0x00cd, 0x00ce, 0x00cf, 54 0x00d0, 0x00d1, 0x00d2, 0x00d3, 0x00d4, 0x00d5, 0x00d6, 0x00f7, 55 0x00d8, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x00dd, 0x00de, 0x0178, 56 0x0100, 0x0100, 0x0102, 0x0102, 0x0104, 0x0104, 0x0106, 0x0106, 57 0x0108, 0x0108, 0x010a, 0x010a, 0x010c, 0x010c, 0x010e, 0x010e, 58 0x0110, 0x0110, 0x0112, 0x0112, 0x0114, 0x0114, 0x0116, 0x0116, 59 0x0118, 0x0118, 0x011a, 0x011a, 0x011c, 0x011c, 0x011e, 0x011e, 60 0x0120, 0x0120, 0x0122, 0x0122, 0x0124, 0x0124, 0x0126, 0x0126, 61 0x0128, 0x0128, 0x012a, 0x012a, 0x012c, 0x012c, 0x012e, 0x012e, 62 0x0130, 0x0131, 0x0132, 0x0132, 0x0134, 0x0134, 0x0136, 0x0136, 63 0x0138, 0x0139, 0x0139, 0x013b, 0x013b, 0x013d, 0x013d, 0x013f, 64 0x013f, 0x0141, 0x0141, 0x0143, 0x0143, 0x0145, 0x0145, 0x0147, 65 0x0147, 0x0149, 0x014a, 0x014a, 0x014c, 0x014c, 0x014e, 0x014e, 66 0x0150, 0x0150, 0x0152, 0x0152, 0x0154, 0x0154, 0x0156, 0x0156, 67 0x0158, 0x0158, 0x015a, 0x015a, 0x015c, 0x015c, 0x015e, 0x015e, 68 0x0160, 0x0160, 0x0162, 0x0162, 0x0164, 0x0164, 0x0166, 0x0166, 69 0x0168, 0x0168, 0x016a, 0x016a, 0x016c, 0x016c, 0x016e, 0x016e, 70 0x0170, 0x0170, 0x0172, 0x0172, 0x0174, 0x0174, 0x0176, 0x0176, 71 0x0178, 0x0179, 0x0179, 0x017b, 0x017b, 0x017d, 0x017d, 0x017f, 72 0x0243, 0x0181, 0x0182, 0x0182, 0x0184, 0x0184, 0x0186, 0x0187, 73 0x0187, 0x0189, 0x018a, 0x018b, 0x018b, 0x018d, 0x018e, 0x018f, 74 0x0190, 0x0191, 0x0191, 0x0193, 0x0194, 0x01f6, 0x0196, 0x0197, 75 0x0198, 0x0198, 0x023d, 0x019b, 0x019c, 0x019d, 0x0220, 0x019f, 76 0x01a0, 0x01a0, 0x01a2, 0x01a2, 0x01a4, 0x01a4, 0x01a6, 0x01a7, 77 0x01a7, 0x01a9, 0x01aa, 0x01ab, 0x01ac, 0x01ac, 0x01ae, 0x01af, 78 0x01af, 0x01b1, 0x01b2, 0x01b3, 0x01b3, 0x01b5, 0x01b5, 0x01b7, 79 0x01b8, 0x01b8, 0x01ba, 0x01bb, 0x01bc, 0x01bc, 0x01be, 0x01f7, 80 0x01c0, 0x01c1, 0x01c2, 0x01c3, 0x01c4, 0x01c5, 0x01c4, 0x01c7, 81 0x01c8, 0x01c7, 0x01ca, 0x01cb, 0x01ca, 0x01cd, 0x01cd, 0x01cf, 82 0x01cf, 0x01d1, 0x01d1, 0x01d3, 0x01d3, 0x01d5, 0x01d5, 0x01d7, 83 0x01d7, 0x01d9, 0x01d9, 0x01db, 0x01db, 0x018e, 0x01de, 0x01de, 84 0x01e0, 0x01e0, 0x01e2, 0x01e2, 0x01e4, 0x01e4, 0x01e6, 0x01e6, 85 0x01e8, 0x01e8, 0x01ea, 0x01ea, 0x01ec, 0x01ec, 0x01ee, 0x01ee, 86 0x01f0, 0x01f1, 0x01f2, 0x01f1, 0x01f4, 0x01f4, 0x01f6, 0x01f7, 87 0x01f8, 0x01f8, 0x01fa, 0x01fa, 0x01fc, 0x01fc, 0x01fe, 0x01fe, 88 0x0200, 0x0200, 0x0202, 0x0202, 0x0204, 0x0204, 0x0206, 0x0206, 89 0x0208, 0x0208, 0x020a, 0x020a, 0x020c, 0x020c, 0x020e, 0x020e, 90 0x0210, 0x0210, 0x0212, 0x0212, 0x0214, 0x0214, 0x0216, 0x0216, 91 0x0218, 0x0218, 0x021a, 0x021a, 0x021c, 0x021c, 0x021e, 0x021e, 92 0x0220, 0x0221, 0x0222, 0x0222, 0x0224, 0x0224, 0x0226, 0x0226, 93 0x0228, 0x0228, 0x022a, 0x022a, 0x022c, 0x022c, 0x022e, 0x022e, 94 0x0230, 0x0230, 0x0232, 0x0232, 0x0234, 0x0235, 0x0236, 0x0237, 95 0x0238, 0x0239, 0x2c65, 0x023b, 0x023b, 0x023d, 0x2c66, 0x023f, 96 0x0240, 0x0241, 0x0241, 0x0243, 0x0244, 0x0245, 0x0246, 0x0246, 97 0x0248, 0x0248, 0x024a, 0x024a, 0x024c, 0x024c, 0x024e, 0x024e, 98 0x0250, 0x0251, 0x0252, 0x0181, 0x0186, 0x0255, 0x0189, 0x018a, 99 0x0258, 0x018f, 0x025a, 0x0190, 0x025c, 0x025d, 0x025e, 0x025f, 100 0x0193, 0x0261, 0x0262, 0x0194, 0x0264, 0x0265, 0x0266, 0x0267, 101 0x0197, 0x0196, 0x026a, 0x2c62, 0x026c, 0x026d, 0x026e, 0x019c, 102 0x0270, 0x0271, 0x019d, 0x0273, 0x0274, 0x019f, 0x0276, 0x0277, 103 0x0278, 0x0279, 0x027a, 0x027b, 0x027c, 0x2c64, 0x027e, 0x027f, 104 0x01a6, 0x0281, 0x0282, 0x01a9, 0x0284, 0x0285, 0x0286, 0x0287, 105 0x01ae, 0x0244, 0x01b1, 0x01b2, 0x0245, 0x028d, 0x028e, 0x028f, 106 0x0290, 0x0291, 0x01b7, 0x0293, 0x0294, 0x0295, 0x0296, 0x0297, 107 0x0298, 0x0299, 0x029a, 0x029b, 0x029c, 0x029d, 0x029e, 0x029f, 108 0x02a0, 0x02a1, 0x02a2, 0x02a3, 0x02a4, 0x02a5, 0x02a6, 0x02a7, 109 0x02a8, 0x02a9, 0x02aa, 0x02ab, 0x02ac, 0x02ad, 0x02ae, 0x02af, 110 0x02b0, 0x02b1, 0x02b2, 0x02b3, 0x02b4, 0x02b5, 0x02b6, 0x02b7, 111 0x02b8, 0x02b9, 0x02ba, 0x02bb, 0x02bc, 0x02bd, 0x02be, 0x02bf, 112 0x02c0, 0x02c1, 0x02c2, 0x02c3, 0x02c4, 0x02c5, 0x02c6, 0x02c7, 113 0x02c8, 0x02c9, 0x02ca, 0x02cb, 0x02cc, 0x02cd, 0x02ce, 0x02cf, 114 0x02d0, 0x02d1, 0x02d2, 0x02d3, 0x02d4, 0x02d5, 0x02d6, 0x02d7, 115 0x02d8, 0x02d9, 0x02da, 0x02db, 0x02dc, 0x02dd, 0x02de, 0x02df, 116 0x02e0, 0x02e1, 0x02e2, 0x02e3, 0x02e4, 0x02e5, 0x02e6, 0x02e7, 117 0x02e8, 0x02e9, 0x02ea, 0x02eb, 0x02ec, 0x02ed, 0x02ee, 0x02ef, 118 0x02f0, 0x02f1, 0x02f2, 0x02f3, 0x02f4, 0x02f5, 0x02f6, 0x02f7, 119 0x02f8, 0x02f9, 0x02fa, 0x02fb, 0x02fc, 0x02fd, 0x02fe, 0x02ff, 120 0x0300, 0x0301, 0x0302, 0x0303, 0x0304, 0x0305, 0x0306, 0x0307, 121 0x0308, 0x0309, 0x030a, 0x030b, 0x030c, 0x030d, 0x030e, 0x030f, 122 0x0310, 0x0311, 0x0312, 0x0313, 0x0314, 0x0315, 0x0316, 0x0317, 123 0x0318, 0x0319, 0x031a, 0x031b, 0x031c, 0x031d, 0x031e, 0x031f, 124 0x0320, 0x0321, 0x0322, 0x0323, 0x0324, 0x0325, 0x0326, 0x0327, 125 0x0328, 0x0329, 0x032a, 0x032b, 0x032c, 0x032d, 0x032e, 0x032f, 126 0x0330, 0x0331, 0x0332, 0x0333, 0x0334, 0x0335, 0x0336, 0x0337, 127 0x0338, 0x0339, 0x033a, 0x033b, 0x033c, 0x033d, 0x033e, 0x033f, 128 0x0340, 0x0341, 0x0342, 0x0343, 0x0344, 0x0345, 0x0346, 0x0347, 129 0x0348, 0x0349, 0x034a, 0x034b, 0x034c, 0x034d, 0x034e, 0x034f, 130 0x0350, 0x0351, 0x0352, 0x0353, 0x0354, 0x0355, 0x0356, 0x0357, 131 0x0358, 0x0359, 0x035a, 0x035b, 0x035c, 0x035d, 0x035e, 0x035f, 132 0x0360, 0x0361, 0x0362, 0x0363, 0x0364, 0x0365, 0x0366, 0x0367, 133 0x0368, 0x0369, 0x036a, 0x036b, 0x036c, 0x036d, 0x036e, 0x036f, 134 0x0370, 0x0371, 0x0372, 0x0373, 0x0374, 0x0375, 0x0376, 0x0377, 135 0x0378, 0x0379, 0x037a, 0x03fd, 0x03fe, 0x03ff, 0x037e, 0x037f, 136 0x0380, 0x0381, 0x0382, 0x0383, 0x0384, 0x0385, 0x0386, 0x0387, 137 0x0388, 0x0389, 0x038a, 0x038b, 0x038c, 0x038d, 0x038e, 0x038f, 138 0x0390, 0x0391, 0x0392, 0x0393, 0x0394, 0x0395, 0x0396, 0x0397, 139 0x0398, 0x0399, 0x039a, 0x039b, 0x039c, 0x039d, 0x039e, 0x039f, 140 0x03a0, 0x03a1, 0x03a2, 0x03a3, 0x03a4, 0x03a5, 0x03a6, 0x03a7, 141 0x03a8, 0x03a9, 0x03aa, 0x03ab, 0x0386, 0x0388, 0x0389, 0x038a, 142 0x03b0, 0x0391, 0x0392, 0x0393, 0x0394, 0x0395, 0x0396, 0x0397, 143 0x0398, 0x0399, 0x039a, 0x039b, 0x039c, 0x039d, 0x039e, 0x039f, 144 0x03a0, 0x03a1, 0x03a3, 0x03a3, 0x03a4, 0x03a5, 0x03a6, 0x03a7, 145 0x03a8, 0x03a9, 0x03aa, 0x03ab, 0x038c, 0x038e, 0x038f, 0x03cf, 146 0x03d0, 0x03d1, 0x03d2, 0x03d3, 0x03d4, 0x03d5, 0x03d6, 0x03d7, 147 0x03d8, 0x03d8, 0x03da, 0x03da, 0x03dc, 0x03dc, 0x03de, 0x03de, 148 0x03e0, 0x03e0, 0x03e2, 0x03e2, 0x03e4, 0x03e4, 0x03e6, 0x03e6, 149 0x03e8, 0x03e8, 0x03ea, 0x03ea, 0x03ec, 0x03ec, 0x03ee, 0x03ee, 150 0x03f0, 0x03f1, 0x03f9, 0x03f3, 0x03f4, 0x03f5, 0x03f6, 0x03f7, 151 0x03f7, 0x03f9, 0x03fa, 0x03fa, 0x03fc, 0x03fd, 0x03fe, 0x03ff, 152 0x0400, 0x0401, 0x0402, 0x0403, 0x0404, 0x0405, 0x0406, 0x0407, 153 0x0408, 0x0409, 0x040a, 0x040b, 0x040c, 0x040d, 0x040e, 0x040f, 154 0x0410, 0x0411, 0x0412, 0x0413, 0x0414, 0x0415, 0x0416, 0x0417, 155 0x0418, 0x0419, 0x041a, 0x041b, 0x041c, 0x041d, 0x041e, 0x041f, 156 0x0420, 0x0421, 0x0422, 0x0423, 0x0424, 0x0425, 0x0426, 0x0427, 157 0x0428, 0x0429, 0x042a, 0x042b, 0x042c, 0x042d, 0x042e, 0x042f, 158 0x0410, 0x0411, 0x0412, 0x0413, 0x0414, 0x0415, 0x0416, 0x0417, 159 0x0418, 0x0419, 0x041a, 0x041b, 0x041c, 0x041d, 0x041e, 0x041f, 160 0x0420, 0x0421, 0x0422, 0x0423, 0x0424, 0x0425, 0x0426, 0x0427, 161 0x0428, 0x0429, 0x042a, 0x042b, 0x042c, 0x042d, 0x042e, 0x042f, 162 0x0400, 0x0401, 0x0402, 0x0403, 0x0404, 0x0405, 0x0406, 0x0407, 163 0x0408, 0x0409, 0x040a, 0x040b, 0x040c, 0x040d, 0x040e, 0x040f, 164 0x0460, 0x0460, 0x0462, 0x0462, 0x0464, 0x0464, 0x0466, 0x0466, 165 0x0468, 0x0468, 0x046a, 0x046a, 0x046c, 0x046c, 0x046e, 0x046e, 166 0x0470, 0x0470, 0x0472, 0x0472, 0x0474, 0x0474, 0x0476, 0x0476, 167 0x0478, 0x0478, 0x047a, 0x047a, 0x047c, 0x047c, 0x047e, 0x047e, 168 0x0480, 0x0480, 0x0482, 0x0483, 0x0484, 0x0485, 0x0486, 0x0487, 169 0x0488, 0x0489, 0x048a, 0x048a, 0x048c, 0x048c, 0x048e, 0x048e, 170 0x0490, 0x0490, 0x0492, 0x0492, 0x0494, 0x0494, 0x0496, 0x0496, 171 0x0498, 0x0498, 0x049a, 0x049a, 0x049c, 0x049c, 0x049e, 0x049e, 172 0x04a0, 0x04a0, 0x04a2, 0x04a2, 0x04a4, 0x04a4, 0x04a6, 0x04a6, 173 0x04a8, 0x04a8, 0x04aa, 0x04aa, 0x04ac, 0x04ac, 0x04ae, 0x04ae, 174 0x04b0, 0x04b0, 0x04b2, 0x04b2, 0x04b4, 0x04b4, 0x04b6, 0x04b6, 175 0x04b8, 0x04b8, 0x04ba, 0x04ba, 0x04bc, 0x04bc, 0x04be, 0x04be, 176 0x04c0, 0x04c1, 0x04c1, 0x04c3, 0x04c3, 0x04c5, 0x04c5, 0x04c7, 177 0x04c7, 0x04c9, 0x04c9, 0x04cb, 0x04cb, 0x04cd, 0x04cd, 0x04c0, 178 0x04d0, 0x04d0, 0x04d2, 0x04d2, 0x04d4, 0x04d4, 0x04d6, 0x04d6, 179 0x04d8, 0x04d8, 0x04da, 0x04da, 0x04dc, 0x04dc, 0x04de, 0x04de, 180 0x04e0, 0x04e0, 0x04e2, 0x04e2, 0x04e4, 0x04e4, 0x04e6, 0x04e6, 181 0x04e8, 0x04e8, 0x04ea, 0x04ea, 0x04ec, 0x04ec, 0x04ee, 0x04ee, 182 0x04f0, 0x04f0, 0x04f2, 0x04f2, 0x04f4, 0x04f4, 0x04f6, 0x04f6, 183 0x04f8, 0x04f8, 0x04fa, 0x04fa, 0x04fc, 0x04fc, 0x04fe, 0x04fe, 184 0x0500, 0x0500, 0x0502, 0x0502, 0x0504, 0x0504, 0x0506, 0x0506, 185 0x0508, 0x0508, 0x050a, 0x050a, 0x050c, 0x050c, 0x050e, 0x050e, 186 0x0510, 0x0510, 0x0512, 0x0512, 0x0514, 0x0515, 0x0516, 0x0517, 187 0x0518, 0x0519, 0x051a, 0x051b, 0x051c, 0x051d, 0x051e, 0x051f, 188 0x0520, 0x0521, 0x0522, 0x0523, 0x0524, 0x0525, 0x0526, 0x0527, 189 0x0528, 0x0529, 0x052a, 0x052b, 0x052c, 0x052d, 0x052e, 0x052f, 190 0x0530, 0x0531, 0x0532, 0x0533, 0x0534, 0x0535, 0x0536, 0x0537, 191 0x0538, 0x0539, 0x053a, 0x053b, 0x053c, 0x053d, 0x053e, 0x053f, 192 0x0540, 0x0541, 0x0542, 0x0543, 0x0544, 0x0545, 0x0546, 0x0547, 193 0x0548, 0x0549, 0x054a, 0x054b, 0x054c, 0x054d, 0x054e, 0x054f, 194 0x0550, 0x0551, 0x0552, 0x0553, 0x0554, 0x0555, 0x0556, 0x0557, 195 0x0558, 0x0559, 0x055a, 0x055b, 0x055c, 0x055d, 0x055e, 0x055f, 196 0x0560, 0x0531, 0x0532, 0x0533, 0x0534, 0x0535, 0x0536, 0x0537, 197 0x0538, 0x0539, 0x053a, 0x053b, 0x053c, 0x053d, 0x053e, 0x053f, 198 0x0540, 0x0541, 0x0542, 0x0543, 0x0544, 0x0545, 0x0546, 0x0547, 199 0x0548, 0x0549, 0x054a, 0x054b, 0x054c, 0x054d, 0x054e, 0x054f, 200 0x0550, 0x0551, 0x0552, 0x0553, 0x0554, 0x0555, 0x0556, 0xffff, 201 0x17f6, 0x2c63, 0x1d7e, 0x1d7f, 0x1d80, 0x1d81, 0x1d82, 0x1d83, 202 0x1d84, 0x1d85, 0x1d86, 0x1d87, 0x1d88, 0x1d89, 0x1d8a, 0x1d8b, 203 0x1d8c, 0x1d8d, 0x1d8e, 0x1d8f, 0x1d90, 0x1d91, 0x1d92, 0x1d93, 204 0x1d94, 0x1d95, 0x1d96, 0x1d97, 0x1d98, 0x1d99, 0x1d9a, 0x1d9b, 205 0x1d9c, 0x1d9d, 0x1d9e, 0x1d9f, 0x1da0, 0x1da1, 0x1da2, 0x1da3, 206 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0x1fea, 0x1feb, 265 0x1ffa, 0x1ffb, 0x1f7e, 0x1f7f, 0x1f88, 0x1f89, 0x1f8a, 0x1f8b, 266 0x1f8c, 0x1f8d, 0x1f8e, 0x1f8f, 0x1f88, 0x1f89, 0x1f8a, 0x1f8b, 267 0x1f8c, 0x1f8d, 0x1f8e, 0x1f8f, 0x1f98, 0x1f99, 0x1f9a, 0x1f9b, 268 0x1f9c, 0x1f9d, 0x1f9e, 0x1f9f, 0x1f98, 0x1f99, 0x1f9a, 0x1f9b, 269 0x1f9c, 0x1f9d, 0x1f9e, 0x1f9f, 0x1fa8, 0x1fa9, 0x1faa, 0x1fab, 270 0x1fac, 0x1fad, 0x1fae, 0x1faf, 0x1fa8, 0x1fa9, 0x1faa, 0x1fab, 271 0x1fac, 0x1fad, 0x1fae, 0x1faf, 0x1fb8, 0x1fb9, 0x1fb2, 0x1fbc, 272 0x1fb4, 0x1fb5, 0x1fb6, 0x1fb7, 0x1fb8, 0x1fb9, 0x1fba, 0x1fbb, 273 0x1fbc, 0x1fbd, 0x1fbe, 0x1fbf, 0x1fc0, 0x1fc1, 0x1fc2, 0x1fc3, 274 0x1fc4, 0x1fc5, 0x1fc6, 0x1fc7, 0x1fc8, 0x1fc9, 0x1fca, 0x1fcb, 275 0x1fc3, 0x1fcd, 0x1fce, 0x1fcf, 0x1fd8, 0x1fd9, 0x1fd2, 0x1fd3, 276 0x1fd4, 0x1fd5, 0x1fd6, 0x1fd7, 0x1fd8, 0x1fd9, 0x1fda, 0x1fdb, 277 0x1fdc, 0x1fdd, 0x1fde, 0x1fdf, 0x1fe8, 0x1fe9, 0x1fe2, 0x1fe3, 278 0x1fe4, 0x1fec, 0x1fe6, 0x1fe7, 0x1fe8, 0x1fe9, 0x1fea, 0x1feb, 279 0x1fec, 0x1fed, 0x1fee, 0x1fef, 0x1ff0, 0x1ff1, 0x1ff2, 0x1ff3, 280 0x1ff4, 0x1ff5, 0x1ff6, 0x1ff7, 0x1ff8, 0x1ff9, 0x1ffa, 0x1ffb, 281 0x1ff3, 0x1ffd, 0x1ffe, 0x1fff, 0x2000, 0x2001, 0x2002, 0x2003, 282 0x2004, 0x2005, 0x2006, 0x2007, 0x2008, 0x2009, 0x200a, 0x200b, 283 0x200c, 0x200d, 0x200e, 0x200f, 0x2010, 0x2011, 0x2012, 0x2013, 284 0x2014, 0x2015, 0x2016, 0x2017, 0x2018, 0x2019, 0x201a, 0x201b, 285 0x201c, 0x201d, 0x201e, 0x201f, 0x2020, 0x2021, 0x2022, 0x2023, 286 0x2024, 0x2025, 0x2026, 0x2027, 0x2028, 0x2029, 0x202a, 0x202b, 287 0x202c, 0x202d, 0x202e, 0x202f, 0x2030, 0x2031, 0x2032, 0x2033, 288 0x2034, 0x2035, 0x2036, 0x2037, 0x2038, 0x2039, 0x203a, 0x203b, 289 0x203c, 0x203d, 0x203e, 0x203f, 0x2040, 0x2041, 0x2042, 0x2043, 290 0x2044, 0x2045, 0x2046, 0x2047, 0x2048, 0x2049, 0x204a, 0x204b, 291 0x204c, 0x204d, 0x204e, 0x204f, 0x2050, 0x2051, 0x2052, 0x2053, 292 0x2054, 0x2055, 0x2056, 0x2057, 0x2058, 0x2059, 0x205a, 0x205b, 293 0x205c, 0x205d, 0x205e, 0x205f, 0x2060, 0x2061, 0x2062, 0x2063, 294 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0x20da, 0x20db, 309 0x20dc, 0x20dd, 0x20de, 0x20df, 0x20e0, 0x20e1, 0x20e2, 0x20e3, 310 0x20e4, 0x20e5, 0x20e6, 0x20e7, 0x20e8, 0x20e9, 0x20ea, 0x20eb, 311 0x20ec, 0x20ed, 0x20ee, 0x20ef, 0x20f0, 0x20f1, 0x20f2, 0x20f3, 312 0x20f4, 0x20f5, 0x20f6, 0x20f7, 0x20f8, 0x20f9, 0x20fa, 0x20fb, 313 0x20fc, 0x20fd, 0x20fe, 0x20ff, 0x2100, 0x2101, 0x2102, 0x2103, 314 0x2104, 0x2105, 0x2106, 0x2107, 0x2108, 0x2109, 0x210a, 0x210b, 315 0x210c, 0x210d, 0x210e, 0x210f, 0x2110, 0x2111, 0x2112, 0x2113, 316 0x2114, 0x2115, 0x2116, 0x2117, 0x2118, 0x2119, 0x211a, 0x211b, 317 0x211c, 0x211d, 0x211e, 0x211f, 0x2120, 0x2121, 0x2122, 0x2123, 318 0x2124, 0x2125, 0x2126, 0x2127, 0x2128, 0x2129, 0x212a, 0x212b, 319 0x212c, 0x212d, 0x212e, 0x212f, 0x2130, 0x2131, 0x2132, 0x2133, 320 0x2134, 0x2135, 0x2136, 0x2137, 0x2138, 0x2139, 0x213a, 0x213b, 321 0x213c, 0x213d, 0x213e, 0x213f, 0x2140, 0x2141, 0x2142, 0x2143, 322 0x2144, 0x2145, 0x2146, 0x2147, 0x2148, 0x2149, 0x214a, 0x214b, 323 0x214c, 0x214d, 0x2132, 0x214f, 0x2150, 0x2151, 0x2152, 0x2153, 324 0x2154, 0x2155, 0x2156, 0x2157, 0x2158, 0x2159, 0x215a, 0x215b, 325 0x215c, 0x215d, 0x215e, 0x215f, 0x2160, 0x2161, 0x2162, 0x2163, 326 0x2164, 0x2165, 0x2166, 0x2167, 0x2168, 0x2169, 0x216a, 0x216b, 327 0x216c, 0x216d, 0x216e, 0x216f, 0x2160, 0x2161, 0x2162, 0x2163, 328 0x2164, 0x2165, 0x2166, 0x2167, 0x2168, 0x2169, 0x216a, 0x216b, 329 0x216c, 0x216d, 0x216e, 0x216f, 0x2180, 0x2181, 0x2182, 0x2183, 330 0x2183, 0xffff, 0x034b, 0x24b6, 0x24b7, 0x24b8, 0x24b9, 0x24ba, 331 0x24bb, 0x24bc, 0x24bd, 0x24be, 0x24bf, 0x24c0, 0x24c1, 0x24c2, 332 0x24c3, 0x24c4, 0x24c5, 0x24c6, 0x24c7, 0x24c8, 0x24c9, 0x24ca, 333 0x24cb, 0x24cc, 0x24cd, 0x24ce, 0x24cf, 0xffff, 0x0746, 0x2c00, 334 0x2c01, 0x2c02, 0x2c03, 0x2c04, 0x2c05, 0x2c06, 0x2c07, 0x2c08, 335 0x2c09, 0x2c0a, 0x2c0b, 0x2c0c, 0x2c0d, 0x2c0e, 0x2c0f, 0x2c10, 336 0x2c11, 0x2c12, 0x2c13, 0x2c14, 0x2c15, 0x2c16, 0x2c17, 0x2c18, 337 0x2c19, 0x2c1a, 0x2c1b, 0x2c1c, 0x2c1d, 0x2c1e, 0x2c1f, 0x2c20, 338 0x2c21, 0x2c22, 0x2c23, 0x2c24, 0x2c25, 0x2c26, 0x2c27, 0x2c28, 339 0x2c29, 0x2c2a, 0x2c2b, 0x2c2c, 0x2c2d, 0x2c2e, 0x2c5f, 0x2c60, 340 0x2c60, 0x2c62, 0x2c63, 0x2c64, 0x2c65, 0x2c66, 0x2c67, 0x2c67, 341 0x2c69, 0x2c69, 0x2c6b, 0x2c6b, 0x2c6d, 0x2c6e, 0x2c6f, 0x2c70, 342 0x2c71, 0x2c72, 0x2c73, 0x2c74, 0x2c75, 0x2c75, 0x2c77, 0x2c78, 343 0x2c79, 0x2c7a, 0x2c7b, 0x2c7c, 0x2c7d, 0x2c7e, 0x2c7f, 0x2c80, 344 0x2c80, 0x2c82, 0x2c82, 0x2c84, 0x2c84, 0x2c86, 0x2c86, 0x2c88, 345 0x2c88, 0x2c8a, 0x2c8a, 0x2c8c, 0x2c8c, 0x2c8e, 0x2c8e, 0x2c90, 346 0x2c90, 0x2c92, 0x2c92, 0x2c94, 0x2c94, 0x2c96, 0x2c96, 0x2c98, 347 0x2c98, 0x2c9a, 0x2c9a, 0x2c9c, 0x2c9c, 0x2c9e, 0x2c9e, 0x2ca0, 348 0x2ca0, 0x2ca2, 0x2ca2, 0x2ca4, 0x2ca4, 0x2ca6, 0x2ca6, 0x2ca8, 349 0x2ca8, 0x2caa, 0x2caa, 0x2cac, 0x2cac, 0x2cae, 0x2cae, 0x2cb0, 350 0x2cb0, 0x2cb2, 0x2cb2, 0x2cb4, 0x2cb4, 0x2cb6, 0x2cb6, 0x2cb8, 351 0x2cb8, 0x2cba, 0x2cba, 0x2cbc, 0x2cbc, 0x2cbe, 0x2cbe, 0x2cc0, 352 0x2cc0, 0x2cc2, 0x2cc2, 0x2cc4, 0x2cc4, 0x2cc6, 0x2cc6, 0x2cc8, 353 0x2cc8, 0x2cca, 0x2cca, 0x2ccc, 0x2ccc, 0x2cce, 0x2cce, 0x2cd0, 354 0x2cd0, 0x2cd2, 0x2cd2, 0x2cd4, 0x2cd4, 0x2cd6, 0x2cd6, 0x2cd8, 355 0x2cd8, 0x2cda, 0x2cda, 0x2cdc, 0x2cdc, 0x2cde, 0x2cde, 0x2ce0, 356 0x2ce0, 0x2ce2, 0x2ce2, 0x2ce4, 0x2ce5, 0x2ce6, 0x2ce7, 0x2ce8, 357 0x2ce9, 0x2cea, 0x2ceb, 0x2cec, 0x2ced, 0x2cee, 0x2cef, 0x2cf0, 358 0x2cf1, 0x2cf2, 0x2cf3, 0x2cf4, 0x2cf5, 0x2cf6, 0x2cf7, 0x2cf8, 359 0x2cf9, 0x2cfa, 0x2cfb, 0x2cfc, 0x2cfd, 0x2cfe, 0x2cff, 0x10a0, 360 0x10a1, 0x10a2, 0x10a3, 0x10a4, 0x10a5, 0x10a6, 0x10a7, 0x10a8, 361 0x10a9, 0x10aa, 0x10ab, 0x10ac, 0x10ad, 0x10ae, 0x10af, 0x10b0, 362 0x10b1, 0x10b2, 0x10b3, 0x10b4, 0x10b5, 0x10b6, 0x10b7, 0x10b8, 363 0x10b9, 0x10ba, 0x10bb, 0x10bc, 0x10bd, 0x10be, 0x10bf, 0x10c0, 364 0x10c1, 0x10c2, 0x10c3, 0x10c4, 0x10c5, 0xffff, 0xd21b, 0xff21, 365 0xff22, 0xff23, 0xff24, 0xff25, 0xff26, 0xff27, 0xff28, 0xff29, 366 0xff2a, 0xff2b, 0xff2c, 0xff2d, 0xff2e, 0xff2f, 0xff30, 0xff31, 367 0xff32, 0xff33, 0xff34, 0xff35, 0xff36, 0xff37, 0xff38, 0xff39, 368 0xff3a, 0xff5b, 0xff5c, 0xff5d, 0xff5e, 0xff5f, 0xff60, 0xff61, 369 0xff62, 0xff63, 0xff64, 0xff65, 0xff66, 0xff67, 0xff68, 0xff69, 370 0xff6a, 0xff6b, 0xff6c, 0xff6d, 0xff6e, 0xff6f, 0xff70, 0xff71, 371 0xff72, 0xff73, 0xff74, 0xff75, 0xff76, 0xff77, 0xff78, 0xff79, 372 0xff7a, 0xff7b, 0xff7c, 0xff7d, 0xff7e, 0xff7f, 0xff80, 0xff81, 373 0xff82, 0xff83, 0xff84, 0xff85, 0xff86, 0xff87, 0xff88, 0xff89, 374 0xff8a, 0xff8b, 0xff8c, 0xff8d, 0xff8e, 0xff8f, 0xff90, 0xff91, 375 0xff92, 0xff93, 0xff94, 0xff95, 0xff96, 0xff97, 0xff98, 0xff99, 376 0xff9a, 0xff9b, 0xff9c, 0xff9d, 0xff9e, 0xff9f, 0xffa0, 0xffa1, 377 0xffa2, 0xffa3, 0xffa4, 0xffa5, 0xffa6, 0xffa7, 0xffa8, 0xffa9, 378 0xffaa, 0xffab, 0xffac, 0xffad, 0xffae, 0xffaf, 0xffb0, 0xffb1, 379 0xffb2, 0xffb3, 0xffb4, 0xffb5, 0xffb6, 0xffb7, 0xffb8, 0xffb9, 380 0xffba, 0xffbb, 0xffbc, 0xffbd, 0xffbe, 0xffbf, 0xffc0, 0xffc1, 381 0xffc2, 0xffc3, 0xffc4, 0xffc5, 0xffc6, 0xffc7, 0xffc8, 0xffc9, 382 0xffca, 0xffcb, 0xffcc, 0xffcd, 0xffce, 0xffcf, 0xffd0, 0xffd1, 383 0xffd2, 0xffd3, 0xffd4, 0xffd5, 0xffd6, 0xffd7, 0xffd8, 0xffd9, 384 0xffda, 0xffdb, 0xffdc, 0xffdd, 0xffde, 0xffdf, 0xffe0, 0xffe1, 385 0xffe2, 0xffe3, 0xffe4, 0xffe5, 0xffe6, 0xffe7, 0xffe8, 0xffe9, 386 0xffea, 0xffeb, 0xffec, 0xffed, 0xffee, 0xffef, 0xfff0, 0xfff1, 387 0xfff2, 0xfff3, 0xfff4, 0xfff5, 0xfff6, 0xfff7, 0xfff8, 0xfff9, 388 0xfffa, 0xfffb, 0xfffc, 0xfffd, 0xfffe, 0xffff, 389 }; 390 391 /* 392 * Allow full-width illegal characters : 393 * "MS windows 7" supports full-width-invalid-name-characters. 394 * So we should check half-width-invalid-name-characters(ASCII) only 395 * for compatibility. 396 * 397 * " * / : < > ? \ | 398 */ 399 static unsigned short bad_uni_chars[] = { 400 0x0022, 0x002A, 0x002F, 0x003A, 401 0x003C, 0x003E, 0x003F, 0x005C, 0x007C, 402 0 403 }; 404 exfat_convert_char_to_ucs2(struct nls_table * nls,const unsigned char * ch,int ch_len,unsigned short * ucs2,int * lossy)405 static int exfat_convert_char_to_ucs2(struct nls_table *nls, 406 const unsigned char *ch, int ch_len, unsigned short *ucs2, 407 int *lossy) 408 { 409 int len; 410 411 *ucs2 = 0x0; 412 413 if (ch[0] < 0x80) { 414 *ucs2 = ch[0]; 415 return 1; 416 } 417 418 len = nls->char2uni(ch, ch_len, ucs2); 419 if (len < 0) { 420 /* conversion failed */ 421 if (lossy != NULL) 422 *lossy |= NLS_NAME_LOSSY; 423 *ucs2 = '_'; 424 return 1; 425 } 426 return len; 427 } 428 exfat_convert_ucs2_to_char(struct nls_table * nls,unsigned short ucs2,unsigned char * ch,int * lossy)429 static int exfat_convert_ucs2_to_char(struct nls_table *nls, 430 unsigned short ucs2, unsigned char *ch, int *lossy) 431 { 432 int len; 433 434 ch[0] = 0x0; 435 436 if (ucs2 < 0x0080) { 437 ch[0] = ucs2; 438 return 1; 439 } 440 441 len = nls->uni2char(ucs2, ch, MAX_CHARSET_SIZE); 442 if (len < 0) { 443 /* conversion failed */ 444 if (lossy != NULL) 445 *lossy |= NLS_NAME_LOSSY; 446 ch[0] = '_'; 447 return 1; 448 } 449 return len; 450 } 451 exfat_toupper(struct super_block * sb,unsigned short a)452 unsigned short exfat_toupper(struct super_block *sb, unsigned short a) 453 { 454 struct exfat_sb_info *sbi = EXFAT_SB(sb); 455 456 return sbi->vol_utbl[a] ? sbi->vol_utbl[a] : a; 457 } 458 exfat_wstrchr(unsigned short * str,unsigned short wchar)459 static unsigned short *exfat_wstrchr(unsigned short *str, unsigned short wchar) 460 { 461 while (*str) { 462 if (*(str++) == wchar) 463 return str; 464 } 465 return NULL; 466 } 467 exfat_uniname_ncmp(struct super_block * sb,unsigned short * a,unsigned short * b,unsigned int len)468 int exfat_uniname_ncmp(struct super_block *sb, unsigned short *a, 469 unsigned short *b, unsigned int len) 470 { 471 int i; 472 473 for (i = 0; i < len; i++, a++, b++) 474 if (exfat_toupper(sb, *a) != exfat_toupper(sb, *b)) 475 return 1; 476 return 0; 477 } 478 exfat_utf16_to_utf8(struct super_block * sb,struct exfat_uni_name * p_uniname,unsigned char * p_cstring,int buflen)479 static int exfat_utf16_to_utf8(struct super_block *sb, 480 struct exfat_uni_name *p_uniname, unsigned char *p_cstring, 481 int buflen) 482 { 483 int len; 484 const unsigned short *uniname = p_uniname->name; 485 486 /* always len >= 0 */ 487 len = utf16s_to_utf8s(uniname, MAX_NAME_LENGTH, UTF16_HOST_ENDIAN, 488 p_cstring, buflen); 489 p_cstring[len] = '\0'; 490 return len; 491 } 492 exfat_utf8_to_utf16(struct super_block * sb,const unsigned char * p_cstring,const int len,struct exfat_uni_name * p_uniname,int * p_lossy)493 static int exfat_utf8_to_utf16(struct super_block *sb, 494 const unsigned char *p_cstring, const int len, 495 struct exfat_uni_name *p_uniname, int *p_lossy) 496 { 497 int i, unilen, lossy = NLS_NAME_NO_LOSSY; 498 __le16 upname[MAX_NAME_LENGTH + 1]; 499 unsigned short *uniname = p_uniname->name; 500 501 WARN_ON(!len); 502 503 unilen = utf8s_to_utf16s(p_cstring, len, UTF16_HOST_ENDIAN, 504 (wchar_t *)uniname, MAX_NAME_LENGTH + 2); 505 if (unilen < 0) { 506 exfat_err(sb, "failed to %s (err : %d) nls len : %d", 507 __func__, unilen, len); 508 return unilen; 509 } 510 511 if (unilen > MAX_NAME_LENGTH) { 512 exfat_debug(sb, "failed to %s (estr:ENAMETOOLONG) nls len : %d, unilen : %d > %d", 513 __func__, len, unilen, MAX_NAME_LENGTH); 514 return -ENAMETOOLONG; 515 } 516 517 for (i = 0; i < unilen; i++) { 518 if (*uniname < 0x0020 || 519 exfat_wstrchr(bad_uni_chars, *uniname)) 520 lossy |= NLS_NAME_LOSSY; 521 522 upname[i] = cpu_to_le16(exfat_toupper(sb, *uniname)); 523 uniname++; 524 } 525 526 *uniname = '\0'; 527 p_uniname->name_len = unilen; 528 p_uniname->name_hash = exfat_calc_chksum16(upname, unilen << 1, 0, 529 CS_DEFAULT); 530 531 if (p_lossy) 532 *p_lossy = lossy; 533 return unilen; 534 } 535 536 #define SURROGATE_MASK 0xfffff800 537 #define SURROGATE_PAIR 0x0000d800 538 #define SURROGATE_LOW 0x00000400 539 __exfat_utf16_to_nls(struct super_block * sb,struct exfat_uni_name * p_uniname,unsigned char * p_cstring,int buflen)540 static int __exfat_utf16_to_nls(struct super_block *sb, 541 struct exfat_uni_name *p_uniname, unsigned char *p_cstring, 542 int buflen) 543 { 544 int i, j, len, out_len = 0; 545 unsigned char buf[MAX_CHARSET_SIZE]; 546 const unsigned short *uniname = p_uniname->name; 547 struct nls_table *nls = EXFAT_SB(sb)->nls_io; 548 549 i = 0; 550 while (i < MAX_NAME_LENGTH && out_len < (buflen - 1)) { 551 if (*uniname == '\0') 552 break; 553 if ((*uniname & SURROGATE_MASK) != SURROGATE_PAIR) { 554 len = exfat_convert_ucs2_to_char(nls, *uniname, buf, 555 NULL); 556 } else { 557 /* Process UTF-16 surrogate pair as one character */ 558 if (!(*uniname & SURROGATE_LOW) && 559 i+1 < MAX_NAME_LENGTH && 560 (*(uniname+1) & SURROGATE_MASK) == SURROGATE_PAIR && 561 (*(uniname+1) & SURROGATE_LOW)) { 562 uniname++; 563 i++; 564 } 565 566 /* 567 * UTF-16 surrogate pair encodes code points above 568 * U+FFFF. Code points above U+FFFF are not supported 569 * by kernel NLS framework therefore use replacement 570 * character 571 */ 572 len = 1; 573 buf[0] = '_'; 574 } 575 576 if (out_len + len >= buflen) 577 len = buflen - 1 - out_len; 578 out_len += len; 579 580 if (len > 1) { 581 for (j = 0; j < len; j++) 582 *p_cstring++ = buf[j]; 583 } else { /* len == 1 */ 584 *p_cstring++ = *buf; 585 } 586 587 uniname++; 588 i++; 589 } 590 591 *p_cstring = '\0'; 592 return out_len; 593 } 594 exfat_nls_to_ucs2(struct super_block * sb,const unsigned char * p_cstring,const int len,struct exfat_uni_name * p_uniname,int * p_lossy)595 static int exfat_nls_to_ucs2(struct super_block *sb, 596 const unsigned char *p_cstring, const int len, 597 struct exfat_uni_name *p_uniname, int *p_lossy) 598 { 599 int i = 0, unilen = 0, lossy = NLS_NAME_NO_LOSSY; 600 __le16 upname[MAX_NAME_LENGTH + 1]; 601 unsigned short *uniname = p_uniname->name; 602 struct nls_table *nls = EXFAT_SB(sb)->nls_io; 603 604 WARN_ON(!len); 605 606 while (unilen < MAX_NAME_LENGTH && i < len) { 607 i += exfat_convert_char_to_ucs2(nls, p_cstring + i, len - i, 608 uniname, &lossy); 609 610 if (*uniname < 0x0020 || 611 exfat_wstrchr(bad_uni_chars, *uniname)) 612 lossy |= NLS_NAME_LOSSY; 613 614 upname[unilen] = cpu_to_le16(exfat_toupper(sb, *uniname)); 615 uniname++; 616 unilen++; 617 } 618 619 if (p_cstring[i] != '\0') 620 lossy |= NLS_NAME_OVERLEN; 621 622 *uniname = '\0'; 623 p_uniname->name_len = unilen; 624 p_uniname->name_hash = exfat_calc_chksum16(upname, unilen << 1, 0, 625 CS_DEFAULT); 626 627 if (p_lossy) 628 *p_lossy = lossy; 629 return unilen; 630 } 631 exfat_utf16_to_nls(struct super_block * sb,struct exfat_uni_name * uniname,unsigned char * p_cstring,int buflen)632 int exfat_utf16_to_nls(struct super_block *sb, struct exfat_uni_name *uniname, 633 unsigned char *p_cstring, int buflen) 634 { 635 if (EXFAT_SB(sb)->options.utf8) 636 return exfat_utf16_to_utf8(sb, uniname, p_cstring, 637 buflen); 638 return __exfat_utf16_to_nls(sb, uniname, p_cstring, buflen); 639 } 640 exfat_nls_to_utf16(struct super_block * sb,const unsigned char * p_cstring,const int len,struct exfat_uni_name * uniname,int * p_lossy)641 int exfat_nls_to_utf16(struct super_block *sb, const unsigned char *p_cstring, 642 const int len, struct exfat_uni_name *uniname, int *p_lossy) 643 { 644 if (EXFAT_SB(sb)->options.utf8) 645 return exfat_utf8_to_utf16(sb, p_cstring, len, 646 uniname, p_lossy); 647 return exfat_nls_to_ucs2(sb, p_cstring, len, uniname, p_lossy); 648 } 649 exfat_load_upcase_table(struct super_block * sb,sector_t sector,unsigned long long num_sectors,unsigned int utbl_checksum)650 static int exfat_load_upcase_table(struct super_block *sb, 651 sector_t sector, unsigned long long num_sectors, 652 unsigned int utbl_checksum) 653 { 654 struct exfat_sb_info *sbi = EXFAT_SB(sb); 655 unsigned int sect_size = sb->s_blocksize; 656 unsigned int i, index = 0; 657 u32 chksum = 0; 658 int ret; 659 unsigned char skip = false; 660 unsigned short *upcase_table; 661 662 upcase_table = kvcalloc(UTBL_COUNT, sizeof(unsigned short), GFP_KERNEL); 663 if (!upcase_table) 664 return -ENOMEM; 665 666 sbi->vol_utbl = upcase_table; 667 num_sectors += sector; 668 669 while (sector < num_sectors) { 670 struct buffer_head *bh; 671 672 bh = sb_bread(sb, sector); 673 if (!bh) { 674 exfat_err(sb, "failed to read sector(0x%llx)", 675 (unsigned long long)sector); 676 ret = -EIO; 677 goto free_table; 678 } 679 sector++; 680 for (i = 0; i < sect_size && index <= 0xFFFF; i += 2) { 681 unsigned short uni = get_unaligned_le16(bh->b_data + i); 682 683 if (skip) { 684 index += uni; 685 skip = false; 686 } else if (uni == index) { 687 index++; 688 } else if (uni == 0xFFFF) { 689 skip = true; 690 } else { /* uni != index , uni != 0xFFFF */ 691 upcase_table[index] = uni; 692 index++; 693 } 694 } 695 chksum = exfat_calc_chksum32(bh->b_data, i, chksum, CS_DEFAULT); 696 brelse(bh); 697 } 698 699 if (index >= 0xFFFF && utbl_checksum == chksum) 700 return 0; 701 702 exfat_err(sb, "failed to load upcase table (idx : 0x%08x, chksum : 0x%08x, utbl_chksum : 0x%08x)", 703 index, chksum, utbl_checksum); 704 ret = -EINVAL; 705 free_table: 706 exfat_free_upcase_table(sbi); 707 return ret; 708 } 709 exfat_load_default_upcase_table(struct super_block * sb)710 static int exfat_load_default_upcase_table(struct super_block *sb) 711 { 712 int i, ret = -EIO; 713 struct exfat_sb_info *sbi = EXFAT_SB(sb); 714 unsigned char skip = false; 715 unsigned short uni = 0, *upcase_table; 716 unsigned int index = 0; 717 718 upcase_table = kvcalloc(UTBL_COUNT, sizeof(unsigned short), GFP_KERNEL); 719 if (!upcase_table) 720 return -ENOMEM; 721 722 sbi->vol_utbl = upcase_table; 723 724 for (i = 0; index <= 0xFFFF && i < EXFAT_NUM_UPCASE; i++) { 725 uni = uni_def_upcase[i]; 726 if (skip) { 727 index += uni; 728 skip = false; 729 } else if (uni == index) { 730 index++; 731 } else if (uni == 0xFFFF) { 732 skip = true; 733 } else { 734 upcase_table[index] = uni; 735 index++; 736 } 737 } 738 739 if (index >= 0xFFFF) 740 return 0; 741 742 /* FATAL error: default upcase table has error */ 743 exfat_free_upcase_table(sbi); 744 return ret; 745 } 746 exfat_create_upcase_table(struct super_block * sb)747 int exfat_create_upcase_table(struct super_block *sb) 748 { 749 int i, ret; 750 unsigned int tbl_clu, type; 751 sector_t sector; 752 unsigned long long tbl_size, num_sectors; 753 unsigned char blksize_bits = sb->s_blocksize_bits; 754 struct exfat_chain clu; 755 struct exfat_dentry *ep; 756 struct exfat_sb_info *sbi = EXFAT_SB(sb); 757 struct buffer_head *bh; 758 759 clu.dir = sbi->root_dir; 760 clu.flags = ALLOC_FAT_CHAIN; 761 762 while (clu.dir != EXFAT_EOF_CLUSTER) { 763 for (i = 0; i < sbi->dentries_per_clu; i++) { 764 ep = exfat_get_dentry(sb, &clu, i, &bh); 765 if (!ep) 766 return -EIO; 767 768 type = exfat_get_entry_type(ep); 769 if (type == TYPE_UNUSED) { 770 brelse(bh); 771 break; 772 } 773 774 if (type != TYPE_UPCASE) { 775 brelse(bh); 776 continue; 777 } 778 779 tbl_clu = le32_to_cpu(ep->dentry.upcase.start_clu); 780 tbl_size = le64_to_cpu(ep->dentry.upcase.size); 781 782 sector = exfat_cluster_to_sector(sbi, tbl_clu); 783 num_sectors = ((tbl_size - 1) >> blksize_bits) + 1; 784 ret = exfat_load_upcase_table(sb, sector, num_sectors, 785 le32_to_cpu(ep->dentry.upcase.checksum)); 786 787 brelse(bh); 788 if (ret && ret != -EIO) 789 goto load_default; 790 791 /* load successfully */ 792 return ret; 793 } 794 795 if (exfat_get_next_cluster(sb, &(clu.dir))) 796 return -EIO; 797 } 798 799 load_default: 800 /* load default upcase table */ 801 return exfat_load_default_upcase_table(sb); 802 } 803 exfat_free_upcase_table(struct exfat_sb_info * sbi)804 void exfat_free_upcase_table(struct exfat_sb_info *sbi) 805 { 806 kvfree(sbi->vol_utbl); 807 } 808