| Start/ | End/ | |||
| True | False | - | Line | Source |
| 1 | /* | |||
| 2 | * linux/fs/fat/dir.c | |||
| 3 | * | |||
| 4 | * directory handling functions for fat-based filesystems | |||
| 5 | * | |||
| 6 | * Written 1992,1993 by Werner Almesberger | |||
| 7 | * | |||
| 8 | * Hidden files 1995 by Albert Cahalan <albert@ccs.neu.edu> <adc@coe.neu.edu> | |||
| 9 | * | |||
| 10 | * VFAT extensions by Gordon Chaffee <chaffee@plateau.cs.berkeley.edu> | |||
| 11 | * Merged with msdos fs by Henrik Storner <storner@osiris.ping.dk> | |||
| 12 | * Rewritten for constant inumbers. Plugged buffer overrun in readdir(). AV | |||
| 13 | * Short name translation 1999, 2001 by Wolfram Pienkoss <wp@bszh.de> | |||
| 14 | */ | |||
| 15 | ||||
| 16 | #include <linux/module.h> | |||
| 17 | #include <linux/slab.h> | |||
| 18 | #include <linux/time.h> | |||
| 19 | #include <linux/msdos_fs.h> | |||
| 20 | #include <linux/dirent.h> | |||
| 21 | #include <linux/smp_lock.h> | |||
| 22 | #include <linux/buffer_head.h> | |||
| 23 | #include <asm/uaccess.h> | |||
| 24 | ||||
| 430975 | 0 | 25 | static inline loff_t fat_make_i_pos(struct super_block *sb, | |
| 26 | struct buffer_head *bh, | |||
| 27 | struct msdos_dir_entry *de) | |||
| 28 | { | |||
| 29 | return ((loff_t)bh->b_blocknr << MSDOS_SB(sb)->dir_per_block_bits) | |||
| 430975 | 30 | | (de - (struct msdos_dir_entry *)bh->b_data); | ||
| 31 | } | |||
| 32 | ||||
| 8774E3 | 310711 | 33 | static inline void fat_dir_readahead(struct inode *dir, sector_t iblock, | |
| 34 | sector_t phys) | |||
| 35 | { | |||
| 36 | struct super_block *sb = dir->i_sb; | |||
| 37 | struct msdos_sb_info *sbi = MSDOS_SB(sb); | |||
| 38 | struct buffer_head *bh; | |||
| 39 | int sec; | |||
| 40 | ||||
| 41 | /* This is not a first sector of cluster, or sec_per_clus == 1 */ | |||
| 8463E3 | 310721 | 42 | if ((iblock & (sbi->sec_per_clus - 1)) || sbi->sec_per_clus == 1) | |
| 8463E3 | 42 | (T) || _ | ||
| 0 | - | 42 | (F) || T | |
| 310721 | 42 | (F) || F | ||
| 8463E3 | 43 | return; | ||
| 44 | /* root dir of FAT12/FAT16 */ | |||
| 10 | 310711 | 45 | if ((sbi->fat_bits != 32) && (dir->i_ino == MSDOS_ROOT_INO)) | |
| 10 | 45 | (T) && (T) | ||
| 111 | 45 | (T) && (F) | ||
| 310600 | 45 | (F) && (_) | ||
| 10 | 46 | return; | ||
| 47 | ||||
| 48 | bh = sb_find_get_block(sb, phys); | |||
| 20780 | 289931 | 49 | if (bh == NULL || !buffer_uptodate(bh)) { | |
| 20708 | 49 | T || _ | ||
| 72 | 49 | F || T | ||
| 289931 | 49 | F || F | ||
| 1317E3 | 20780 | 50 | for (sec = 0; sec < sbi->sec_per_clus; sec++) | |
| 51 | sb_breadahead(sb, phys + sec); | |||
| 52 | } | |||
| 53 | brelse(bh); | |||
| 54 | } | |||
| 55 | ||||
| 56 | /* Returns the inode number of the directory entry at offset pos. If bh is | |||
| 57 | non-NULL, it is brelse'd before. Pos is incremented. The buffer header is | |||
| 58 | returned in bh. | |||
| 59 | AV. Most often we do it item-by-item. Makes sense to optimize. | |||
| 60 | AV. OK, there we go: if both bh and de are non-NULL we assume that we just | |||
| 61 | AV. want the next entry (took one explicit de=NULL in vfat/namei.c). | |||
| 62 | AV. It's done in fat_get_entry() (inlined), here the slow case lives. | |||
| 63 | AV. Additionally, when we return -1 (i.e. reached the end of directory) | |||
| 64 | AV. we make bh NULL. | |||
| 65 | */ | |||
| 8836E3 | 0 | 66 | static int fat__get_entry(struct inode *dir, loff_t *pos, | |
| 67 | struct buffer_head **bh, struct msdos_dir_entry **de) | |||
| 68 | { | |||
| 69 | struct super_block *sb = dir->i_sb; | |||
| 70 | sector_t phys, iblock; | |||
| 71 | unsigned long mapped_blocks; | |||
| 72 | int err, offset; | |||
| 73 | ||||
| 74 | next: | |||
| 8559E3 | 276986 | 75 | if (*bh) | |
| 76 | brelse(*bh); | |||
| 77 | ||||
| 78 | *bh = NULL; | |||
| 79 | iblock = *pos >> sb->s_blocksize_bits; | |||
| 80 | err = fat_bmap(dir, iblock, &phys, &mapped_blocks); | |||
| 61725 | 8774E3 | 81 | if (err || !phys) | |
| 0 | - | 81 | T || _ | |
| 61725 | 81 | F || T | ||
| 8774E3 | 81 | F || F | ||
| 61725 | 82 | return -1; /* beyond EOF or error */ | ||
| 83 | ||||
| 84 | fat_dir_readahead(dir, iblock, phys); | |||
| 85 | ||||
| 86 | *bh = sb_bread(sb, phys); | |||
| 0 | 8774E3 | - | 87 | if (*bh == NULL) { |
| 88 | printk(KERN_ERR "FAT: Directory bread(block %llu) failed\n", | |||
| 89 | (unsigned long long)phys); | |||
| 90 | /* skip this block */ | |||
| 91 | *pos = (iblock + 1) << sb->s_blocksize_bits; | |||
| 0 | - | 92 | goto next; | |
| 93 | } | |||
| 94 | ||||
| 95 | offset = *pos & (sb->s_blocksize - 1); | |||
| 96 | *pos += sizeof(struct msdos_dir_entry); | |||
| 97 | *de = (struct msdos_dir_entry *)((*bh)->b_data + offset); | |||
| 98 | ||||
| 8774E3 | 99 | return 0; | ||
| 100 | } | |||
| 101 | ||||
| 1387E5 | 0 | 102 | static inline int fat_get_entry(struct inode *dir, loff_t *pos, | |
| 103 | struct buffer_head **bh, | |||
| 104 | struct msdos_dir_entry **de) | |||
| 105 | { | |||
| 106 | /* Fast stuff first */ | |||
| 107 | if (*bh && *de && | |||
| 1299E5 | 8836E3 | 108 | (*de - (struct msdos_dir_entry *)(*bh)->b_data) < MSDOS_SB(dir->i_sb)->dir_per_block - 1) { | |
| 1299E5 | 108 | T && T && T | ||
| 8559E3 | 108 | T && T && F | ||
| 0 | - | 108 | T && F && _ | |
| 276986 | 108 | F && _ && _ | ||
| 109 | *pos += sizeof(struct msdos_dir_entry); | |||
| 110 | (*de)++; | |||
| 1299E5 | 111 | return 0; | ||
| 112 | } | |||
| 8836E3 | 113 | return fat__get_entry(dir, pos, bh, de); | ||
| 114 | } | |||
| 115 | ||||
| 116 | /* | |||
| 117 | * Convert Unicode 16 to UTF8, translated Unicode, or ASCII. | |||
| 118 | * If uni_xlate is enabled and we can't get a 1:1 conversion, use a | |||
| 119 | * colon as an escape character since it is normally invalid on the vfat | |||
| 120 | * filesystem. The following four characters are the hexadecimal digits | |||
| 121 | * of Unicode value. This lets us do a full dump and restore of Unicode | |||
| 122 | * filenames. We could get into some trouble with long Unicode names, | |||
| 123 | * but ignore that right now. | |||
| 124 | * Ahem... Stack smashing in ring 0 isn't fun. Fixed. | |||
| 125 | */ | |||
| 8723E4 | 0 | 126 | static int uni16_to_x8(unsigned char *ascii, wchar_t *uni, int uni_xlate, | |
| 127 | struct nls_table *nls) | |||
| 128 | { | |||
| 129 | wchar_t *ip, ec; | |||
| 130 | unsigned char *op, nc; | |||
| 131 | int charlen; | |||
| 132 | int k; | |||
| 133 | ||||
| 134 | ip = uni; | |||
| 135 | op = ascii; | |||
| 136 | ||||
| 9319E5 | 8723E4 | 137 | while (*ip) { | |
| 138 | ec = *ip++; | |||
| 9319E5 | 0 | - | 139 | if ( (charlen = nls->uni2char(ec, op, NLS_MAX_CHARSET_SIZE)) > 0) { |
| 140 | op += charlen; | |||
| 141 | } else { | |||
| 0 | 0 | - | 142 | if (uni_xlate == 1) { |
| 143 | *op = ':'; | |||
| 0 | 0 | - | 144 | for (k = 4; k > 0; k--) { |
| 145 | nc = ec & 0xF; | |||
| 146 | op[k] = nc > 9 ? nc + ('a' - 10) | |||
| 0 | 0 | - | 146 | ternary-?: nc > 9 |
| 147 | : nc + '0'; | |||
| 148 | ec >>= 4; | |||
| 149 | } | |||
| 150 | op += 5; | |||
| 151 | } else { | |||
| 152 | *op++ = '?'; | |||
| 153 | } | |||
| 154 | } | |||
| 155 | /* We have some slack there, so it's OK */ | |||
| 0 | 9319E5 | - | 156 | if (op>ascii+256) { |
| 157 | op = ascii + 256; | |||
| 0 | - | 158 | break; | |
| 159 | } | |||
| 160 | } | |||
| 161 | *op = 0; | |||
| 8723E4 | 162 | return (op - ascii); | ||
| 163 | } | |||
| 164 | ||||
| 165 | static inline int | |||
| 9736E5 | 0 | 166 | fat_short2uni(struct nls_table *t, unsigned char *c, int clen, wchar_t *uni) | |
| 167 | { | |||
| 168 | int charlen; | |||
| 169 | ||||
| 170 | charlen = t->char2uni(c, clen, uni); | |||
| 0 | 9736E5 | - | 171 | if (charlen < 0) { |
| 172 | *uni = 0x003f; /* a question mark */ | |||
| 173 | charlen = 1; | |||
| 174 | } | |||
| 9736E5 | 175 | return charlen; | ||
| 176 | } | |||
| 177 | ||||
| 178 | static inline int | |||
| 61226 | 0 | 179 | fat_short2lower_uni(struct nls_table *t, unsigned char *c, int clen, wchar_t *uni) | |
| 180 | { | |||
| 181 | int charlen; | |||
| 182 | wchar_t wc; | |||
| 183 | ||||
| 184 | charlen = t->char2uni(c, clen, &wc); | |||
| 0 | 61226 | - | 185 | if (charlen < 0) { |
| 186 | *uni = 0x003f; /* a question mark */ | |||
| 187 | charlen = 1; | |||
| 61226 | 0 | - | 188 | } else if (charlen <= 1) { |
| 189 | unsigned char nc = t->charset2lower[*c]; | |||
| 190 | ||||
| 0 | 61226 | - | 191 | if (!nc) |
| 192 | nc = *c; | |||
| 193 | ||||
| 0 | 61226 | - | 194 | if ( (charlen = t->char2uni(&nc, 1, uni)) < 0) { |
| 195 | *uni = 0x003f; /* a question mark */ | |||
| 196 | charlen = 1; | |||
| 197 | } | |||
| 198 | } else | |||
| 199 | *uni = wc; | |||
| 200 | ||||
| 61226 | 201 | return charlen; | ||
| 202 | } | |||
| 203 | ||||
| 204 | static inline int | |||
| 8925E5 | 0 | 205 | fat_shortname2uni(struct nls_table *nls, unsigned char *buf, int buf_size, | |
| 206 | wchar_t *uni_buf, unsigned short opt, int lower) | |||
| 207 | { | |||
| 208 | int len = 0; | |||
| 209 | ||||
| 61226 | 8925E5 | 210 | if (opt & VFAT_SFN_DISPLAY_LOWER) | |
| 211 | len = fat_short2lower_uni(nls, buf, buf_size, uni_buf); | |||
| 8925E5 | 0 | - | 212 | else if (opt & VFAT_SFN_DISPLAY_WIN95) |
| 213 | len = fat_short2uni(nls, buf, buf_size, uni_buf); | |||
| 0 | 0 | - | 214 | else if (opt & VFAT_SFN_DISPLAY_WINNT) { |
| 0 | 0 | - | 215 | if (lower) |
| 216 | len = fat_short2lower_uni(nls, buf, buf_size, uni_buf); | |||
| 217 | else | |||
| 218 | len = fat_short2uni(nls, buf, buf_size, uni_buf); | |||
| 219 | } else | |||
| 220 | len = fat_short2uni(nls, buf, buf_size, uni_buf); | |||
| 221 | ||||
| 8925E5 | 222 | return len; | ||
| 223 | } | |||
| 224 | ||||
| 225 | enum { PARSE_INVALID = 1, PARSE_NOT_LONGNAME, PARSE_EOF, }; | |||
| 226 | ||||
| 227 | /** | |||
| 228 | * fat_parse_long - Parse extended directory entry. | |||
| 229 | * | |||
| 230 | * This function returns zero on success, negative value on error, or one of | |||
| 231 | * the following: | |||
| 232 | * | |||
| 233 | * %PARSE_INVALID - Directory entry is invalid. | |||
| 234 | * %PARSE_NOT_LONGNAME - Directory entry does not contain longname. | |||
| 235 | * %PARSE_EOF - Directory has no more entries. | |||
| 236 | */ | |||
| 6114E3 | 0 | 237 | static int fat_parse_long(struct inode *dir, loff_t *pos, | |
| 238 | struct buffer_head **bh, struct msdos_dir_entry **de, | |||
| 239 | wchar_t **unicode, unsigned char *nr_slots) | |||
| 240 | { | |||
| 241 | struct msdos_dir_slot *ds; | |||
| 242 | unsigned char id, slot, slots, alias_checksum; | |||
| 243 | ||||
| 168700 | 5945E3 | 244 | if (!*unicode) { | |
| 245 | *unicode = (wchar_t *)__get_free_page(GFP_KERNEL); | |||
| 0 | 168700 | - | 246 | if (!*unicode) { |
| 247 | brelse(*bh); | |||
| 0 | - | 248 | return -ENOMEM; | |
| 249 | } | |||
| 250 | } | |||
| 251 | parse_long: | |||
| 252 | slots = 0; | |||
| 253 | ds = (struct msdos_dir_slot *)*de; | |||
| 254 | id = ds->id; | |||
| 0 | 6114E3 | - | 255 | if (!(id & 0x40)) |
| 0 | - | 256 | return PARSE_INVALID; | |
| 257 | slots = id & ~0x40; | |||
| 0 | 6114E3 | - | 258 | if (slots > 20 || !slots) /* ceil(256 * 2 / 26) */ |
| 0 | - | 258 | T || _ | |
| 0 | - | 258 | F || T | |
| 6114E3 | 258 | F || F | ||
| 0 | - | 259 | return PARSE_INVALID; | |
| 260 | *nr_slots = slots; | |||
| 261 | alias_checksum = ds->alias_checksum; | |||
| 262 | ||||
| 263 | slot = slots; | |||
| 9300E3 | 0 | - | 264 | while (1) { |
| 265 | int offset; | |||
| 266 | ||||
| 267 | slot--; | |||
| 268 | offset = slot * 13; | |||
| 269 | fat16_towchar(*unicode + offset, ds->name0_4, 5); | |||
| 270 | fat16_towchar(*unicode + offset + 5, ds->name5_10, 6); | |||
| 271 | fat16_towchar(*unicode + offset + 11, ds->name11_12, 2); | |||
| 272 | ||||
| 6114E3 | 3186E3 | 273 | if (ds->id & 0x40) | |
| 274 | (*unicode)[offset + 13] = 0; | |||
| 0 | 9300E3 | - | 275 | if (fat_get_entry(dir, pos, bh, de) < 0) |
| 0 | - | 276 | return PARSE_EOF; | |
| 6114E3 | 3186E3 | 277 | if (slot == 0) | |
| 6114E3 | 278 | break; | ||
| 279 | ds = (struct msdos_dir_slot *)*de; | |||
| 0 | 3186E3 | - | 280 | if (ds->attr != ATTR_EXT) |
| 0 | - | 281 | return PARSE_NOT_LONGNAME; | |
| 0 | 3186E3 | - | 282 | if ((ds->id & ~0x40) != slot) |
| 0 | - | 283 | goto parse_long; | |
| 0 | 3186E3 | - | 284 | if (ds->alias_checksum != alias_checksum) |
| 0 | - | 285 | goto parse_long; | |
| 286 | } | |||
| 0 | 6114E3 | - | 287 | if ((*de)->name[0] == DELETED_FLAG) |
| 0 | - | 288 | return PARSE_INVALID; | |
| 0 | 6114E3 | - | 289 | if ((*de)->attr == ATTR_EXT) |
| 0 | - | 290 | goto parse_long; | |
| 0 | 6114E3 | - | 291 | if (IS_FREE((*de)->name) || ((*de)->attr & ATTR_VOLUME)) |
| 0 | - | 291 | (T || _) || (_) | |
| 0 | - | 291 | (F || T) || (_) | |
| 0 | - | 291 | (F || F) || (T) | |
| 6114E3 | 291 | (F || F) || (F) | ||
| 0 | - | 292 | return PARSE_INVALID; | |
| 0 | 6114E3 | - | 293 | if (fat_checksum((*de)->name) != alias_checksum) |
| 294 | *nr_slots = 0; | |||
| 295 | ||||
| 6114E3 | 296 | return 0; | ||
| 297 | } | |||
| 298 | ||||
| 299 | /* | |||
| 300 | * Return values: negative -> error, 0 -> not found, positive -> found, | |||
| 301 | * value is the total amount of slots, including the shortname entry. | |||
| 302 | */ | |||
| 215222 | 0 | 303 | int fat_search_long(struct inode *inode, const unsigned char *name, | |
| 304 | int name_len, struct fat_slot_info *sinfo) | |||
| 305 | { | |||
| 306 | struct super_block *sb = inode->i_sb; | |||
| 307 | struct msdos_sb_info *sbi = MSDOS_SB(sb); | |||
| 308 | struct buffer_head *bh = NULL; | |||
| 309 | struct msdos_dir_entry *de; | |||
| 310 | struct nls_table *nls_io = sbi->nls_io; | |||
| 311 | struct nls_table *nls_disk = sbi->nls_disk; | |||
| 312 | wchar_t bufuname[14]; | |||
| 313 | unsigned char xlate_len, nr_slots; | |||
| 314 | wchar_t *unicode = NULL; | |||
| 315 | unsigned char work[8], bufname[260]; /* 256 + 4 */ | |||
| 316 | int uni_xlate = sbi->options.unicode_xlate; | |||
| 317 | int utf8 = sbi->options.utf8; | |||
| 318 | int anycase = (sbi->options.name_check != 's'); | |||
| 319 | unsigned short opt_shortname = sbi->options.shortname; | |||
| 320 | loff_t cpos = 0; | |||
| 321 | int chl, i, j, last_u, err; | |||
| 322 | ||||
| 323 | err = -ENOENT; | |||
| 8760E4 | 0 | - | 324 | while(1) { |
| 4 | 8760E4 | 325 | if (fat_get_entry(inode, &cpos, &bh, &de) == -1) | |
| 4 | 326 | goto EODir; | ||
| 327 | parse_record: | |||
| 328 | nr_slots = 0; | |||
| 6719E3 | 8088E4 | 329 | if (de->name[0] == DELETED_FLAG) | |
| 6719E3 | 330 | continue; | ||
| 433 | 8088E4 | 331 | if (de->attr != ATTR_EXT && (de->attr & ATTR_VOLUME)) | |
| 433 | 331 | T && (T) | ||
| 7486E4 | 331 | T && (F) | ||
| 6025E3 | 331 | F && (_) | ||
| 433 | 332 | continue; | ||
| 2264 | 8088E4 | 333 | if (de->attr != ATTR_EXT && IS_FREE(de->name)) | |
| 2264 | 333 | T && (T || _) | ||
| 0 | - | 333 | T && (F || T) | |
| 7486E4 | 333 | T && (F || F) | ||
| 6025E3 | 333 | F && (_ || _) | ||
| 2264 | 334 | continue; | ||
| 6025E3 | 7486E4 | 335 | if (de->attr == ATTR_EXT) { | |
| 336 | int status = fat_parse_long(inode, &cpos, &bh, &de, | |||
| 337 | &unicode, &nr_slots); | |||
| 0 | 6025E3 | - | 338 | if (status < 0) |
| 0 | - | 339 | return status; | |
| 0 | 6025E3 | - | 340 | else if (status == PARSE_INVALID) |
| 0 | - | 341 | continue; | |
| 0 | 6025E3 | - | 342 | else if (status == PARSE_NOT_LONGNAME) |
| 0 | - | 343 | goto parse_record; | |
| 0 | 6025E3 | - | 344 | else if (status == PARSE_EOF) |
| 0 | - | 345 | goto EODir; | |
| 346 | } | |||
| 347 | ||||
| 348 | memcpy(work, de->name, sizeof(de->name)); | |||
| 349 | /* see namei.c, msdos_format_name */ | |||
| 0 | 8088E4 | - | 350 | if (work[0] == 0x05) |
| 351 | work[0] = 0xE5; | |||
| 6470E5 | 8088E4 | 352 | for (i = 0, j = 0, last_u = 0; i < 8;) { | |
| 0 | 6470E5 | - | 353 | if (!work[i]) break; |
| 0 | - | 353 | break | |
| 354 | chl = fat_shortname2uni(nls_disk, &work[i], 8 - i, | |||
| 355 | &bufuname[j++], opt_shortname, | |||
| 356 | de->lcase & CASE_LOWER_BASE); | |||
| 6470E5 | 0 | - | 357 | if (chl <= 1) { |
| 5417E5 | 1053E5 | 358 | if (work[i] != ' ') | |
| 359 | last_u = j; | |||
| 360 | } else { | |||
| 361 | last_u = j; | |||
| 362 | } | |||
| 363 | i += chl; | |||
| 364 | } | |||
| 365 | j = last_u; | |||
| 366 | fat_short2uni(nls_disk, ".", 1, &bufuname[j++]); | |||
| 2426E5 | 8088E4 | 367 | for (i = 0; i < 3;) { | |
| 0 | 2426E5 | - | 368 | if (!de->ext[i]) break; |
| 0 | - | 368 | break | |
| 369 | chl = fat_shortname2uni(nls_disk, &de->ext[i], 3 - i, | |||
| 370 | &bufuname[j++], opt_shortname, | |||
| 371 | de->lcase & CASE_LOWER_EXT); | |||
| 2426E5 | 0 | - | 372 | if (chl <= 1) { |
| 2238E5 | 1882E4 | 373 | if (de->ext[i] != ' ') | |
| 374 | last_u = j; | |||
| 375 | } else { | |||
| 376 | last_u = j; | |||
| 377 | } | |||
| 378 | i += chl; | |||
| 379 | } | |||
| 0 | 8088E4 | - | 380 | if (!last_u) |
| 0 | - | 381 | continue; | |
| 382 | ||||
| 383 | bufuname[last_u] = 0x0000; | |||
| 384 | xlate_len = utf8 | |||
| 385 | ?utf8_wcstombs(bufname, bufuname, sizeof(bufname)) | |||
| 0 | 8088E4 | - | 385 | ternary-?: utf8 |
| 386 | :uni16_to_x8(bufname, bufuname, uni_xlate, nls_io); | |||
| 1925E4 | 6163E4 | 387 | if (xlate_len == name_len) | |
| 388 | if ((!anycase && !memcmp(name, bufname, xlate_len)) || | |||
| 389 | (anycase && !nls_strnicmp(nls_io, name, bufname, | |||
| 148747 | 1910E4 | 390 | xlate_len))) | |
| 0 | - | 390 | (T && T) || (_ && _) | |
| 0 | - | 390 | (T && F) || (T && T) | |
| 148747 | 390 | (F && _) || (T && T) | ||
| 0 | - | 390 | (T && F) || (T && F) | |
| 0 | - | 390 | (T && F) || (F && _) | |
| 1910E4 | 390 | (F && _) || (T && F) | ||
| 0 | - | 390 | (F && _) || (F && _) | |
| 148747 | 391 | goto Found; | ||
| 392 | ||||
| 6003E3 | 7473E4 | 393 | if (nr_slots) { | |
| 394 | xlate_len = utf8 | |||
| 395 | ?utf8_wcstombs(bufname, unicode, sizeof(bufname)) | |||
| 0 | 6003E3 | - | 395 | ternary-?: utf8 |
| 396 | :uni16_to_x8(bufname, unicode, uni_xlate, nls_io); | |||
| 4539E3 | 1463E3 | 397 | if (xlate_len != name_len) | |
| 4539E3 | 398 | continue; | ||
| 399 | if ((!anycase && !memcmp(name, bufname, xlate_len)) || | |||
| 400 | (anycase && !nls_strnicmp(nls_io, name, bufname, | |||
| 66471 | 1397E3 | 401 | xlate_len))) | |
| 0 | - | 401 | (T && T) || (_ && _) | |
| 0 | - | 401 | (T && F) || (T && T) | |
| 66471 | 401 | (F && _) || (T && T) | ||
| 0 | - | 401 | (T && F) || (T && F) | |
| 0 | - | 401 | (T && F) || (F && _) | |
| 1397E3 | 401 | (F && _) || (T && F) | ||
| 0 | - | 401 | (F && _) || (F && _) | |
| 66471 | 402 | goto Found; | ||
| 403 | } | |||
| 404 | } | |||
| 405 | ||||
| 406 | Found: | |||
| 407 | nr_slots++; /* include the de */ | |||
| 408 | sinfo->slot_off = cpos - nr_slots * sizeof(*de); | |||
| 409 | sinfo->nr_slots = nr_slots; | |||
| 410 | sinfo->de = de; | |||
| 411 | sinfo->bh = bh; | |||
| 412 | sinfo->i_pos = fat_make_i_pos(sb, sinfo->bh, sinfo->de); | |||
| 413 | err = 0; | |||
| 414 | EODir: | |||
| 154312 | 60910 | 415 | if (unicode) | |
| 416 | free_page((unsigned long)unicode); | |||
| 417 | ||||
| 215222 | 418 | return err; | ||
| 419 | } | |||
| 420 | ||||
| 421 | EXPORT_SYMBOL_GPL(fat_search_long); | |||
| 422 | ||||
| 423 | struct fat_ioctl_filldir_callback { | |||
| 424 | struct dirent __user *dirent; | |||
| 425 | int result; | |||
| 426 | /* for dir ioctl */ | |||
| 427 | const char *longname; | |||
| 428 | int long_len; | |||
| 429 | const char *shortname; | |||
| 430 | int short_len; | |||
| 431 | }; | |||
| 432 | ||||
| 41160 | 0 | 433 | static int __fat_readdir(struct inode *inode, struct file *filp, void *dirent, | |
| 434 | filldir_t filldir, int short_only, int both) | |||
| 435 | { | |||
| 436 | struct super_block *sb = inode->i_sb; | |||
| 437 | struct msdos_sb_info *sbi = MSDOS_SB(sb); | |||
| 438 | struct buffer_head *bh; | |||
| 439 | struct msdos_dir_entry *de; | |||
| 440 | struct nls_table *nls_io = sbi->nls_io; | |||
| 441 | struct nls_table *nls_disk = sbi->nls_disk; | |||
| 442 | unsigned char long_slots; | |||
| 443 | const char *fill_name; | |||
| 444 | int fill_len; | |||
| 445 | wchar_t bufuname[14]; | |||
| 446 | wchar_t *unicode = NULL; | |||
| 447 | unsigned char c, work[8], bufname[56], *ptname = bufname; | |||
| 448 | unsigned long lpos, dummy, *furrfu = &lpos; | |||
| 449 | ||||