| 1 | /* |
| 2 | * linux/fs/hpfs/namei.c |
| 3 | * |
| 4 | * Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999 |
| 5 | * |
| 6 | * adding & removing files & directories |
| 7 | */ |
| 8 | #include <linux/sched.h> |
| 9 | #include "hpfs_fn.h" |
| 10 | |
| 11 | static void hpfs_update_directory_times(struct inode *dir) |
| 12 | { |
| 13 | time_t t = get_seconds(); |
| 14 | if (t == dir->i_mtime.tv_sec && |
| 15 | t == dir->i_ctime.tv_sec) |
| 16 | return; |
| 17 | dir->i_mtime.tv_sec = dir->i_ctime.tv_sec = t; |
| 18 | dir->i_mtime.tv_nsec = dir->i_ctime.tv_nsec = 0; |
| 19 | hpfs_write_inode_nolock(dir); |
| 20 | } |
| 21 | |
| 22 | static int hpfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) |
| 23 | { |
| 24 | const unsigned char *name = dentry->d_name.name; |
| 25 | unsigned len = dentry->d_name.len; |
| 26 | struct quad_buffer_head qbh0; |
| 27 | struct buffer_head *bh; |
| 28 | struct hpfs_dirent *de; |
| 29 | struct fnode *fnode; |
| 30 | struct dnode *dnode; |
| 31 | struct inode *result; |
| 32 | fnode_secno fno; |
| 33 | dnode_secno dno; |
| 34 | int r; |
| 35 | struct hpfs_dirent dee; |
| 36 | int err; |
| 37 | if ((err = hpfs_chk_name(name, &len))) return err==-ENOENT ? -EINVAL : err; |
| 38 | hpfs_lock(dir->i_sb); |
| 39 | err = -ENOSPC; |
| 40 | fnode = hpfs_alloc_fnode(dir->i_sb, hpfs_i(dir)->i_dno, &fno, &bh); |
| 41 | if (!fnode) |
| 42 | goto bail; |
| 43 | dnode = hpfs_alloc_dnode(dir->i_sb, fno, &dno, &qbh0); |
| 44 | if (!dnode) |
| 45 | goto bail1; |
| 46 | memset(&dee, 0, sizeof dee); |
| 47 | dee.directory = 1; |
| 48 | if (!(mode & 0222)) dee.read_only = 1; |
| 49 | /*dee.archive = 0;*/ |
| 50 | dee.hidden = name[0] == '.'; |
| 51 | dee.fnode = cpu_to_le32(fno); |
| 52 | dee.creation_date = dee.write_date = dee.read_date = cpu_to_le32(gmt_to_local(dir->i_sb, get_seconds())); |
| 53 | result = new_inode(dir->i_sb); |
| 54 | if (!result) |
| 55 | goto bail2; |
| 56 | hpfs_init_inode(result); |
| 57 | result->i_ino = fno; |
| 58 | hpfs_i(result)->i_parent_dir = dir->i_ino; |
| 59 | hpfs_i(result)->i_dno = dno; |
| 60 | result->i_ctime.tv_sec = result->i_mtime.tv_sec = result->i_atime.tv_sec = local_to_gmt(dir->i_sb, le32_to_cpu(dee.creation_date)); |
| 61 | result->i_ctime.tv_nsec = 0; |
| 62 | result->i_mtime.tv_nsec = 0; |
| 63 | result->i_atime.tv_nsec = 0; |
| 64 | hpfs_i(result)->i_ea_size = 0; |
| 65 | result->i_mode |= S_IFDIR; |
| 66 | result->i_op = &hpfs_dir_iops; |
| 67 | result->i_fop = &hpfs_dir_ops; |
| 68 | result->i_blocks = 4; |
| 69 | result->i_size = 2048; |
| 70 | set_nlink(result, 2); |
| 71 | if (dee.read_only) |
| 72 | result->i_mode &= ~0222; |
| 73 | |
| 74 | r = hpfs_add_dirent(dir, name, len, &dee); |
| 75 | if (r == 1) |
| 76 | goto bail3; |
| 77 | if (r == -1) { |
| 78 | err = -EEXIST; |
| 79 | goto bail3; |
| 80 | } |
| 81 | fnode->len = len; |
| 82 | memcpy(fnode->name, name, len > 15 ? 15 : len); |
| 83 | fnode->up = cpu_to_le32(dir->i_ino); |
| 84 | fnode->flags |= FNODE_dir; |
| 85 | fnode->btree.n_free_nodes = 7; |
| 86 | fnode->btree.n_used_nodes = 1; |
| 87 | fnode->btree.first_free = cpu_to_le16(0x14); |
| 88 | fnode->u.external[0].disk_secno = cpu_to_le32(dno); |
| 89 | fnode->u.external[0].file_secno = cpu_to_le32(-1); |
| 90 | dnode->root_dnode = 1; |
| 91 | dnode->up = cpu_to_le32(fno); |
| 92 | de = hpfs_add_de(dir->i_sb, dnode, "\001\001", 2, 0); |
| 93 | de->creation_date = de->write_date = de->read_date = cpu_to_le32(gmt_to_local(dir->i_sb, get_seconds())); |
| 94 | if (!(mode & 0222)) de->read_only = 1; |
| 95 | de->first = de->directory = 1; |
| 96 | /*de->hidden = de->system = 0;*/ |
| 97 | de->fnode = cpu_to_le32(fno); |
| 98 | mark_buffer_dirty(bh); |
| 99 | brelse(bh); |
| 100 | hpfs_mark_4buffers_dirty(&qbh0); |
| 101 | hpfs_brelse4(&qbh0); |
| 102 | inc_nlink(dir); |
| 103 | insert_inode_hash(result); |
| 104 | |
| 105 | if (!uid_eq(result->i_uid, current_fsuid()) || |
| 106 | !gid_eq(result->i_gid, current_fsgid()) || |
| 107 | result->i_mode != (mode | S_IFDIR)) { |
| 108 | result->i_uid = current_fsuid(); |
| 109 | result->i_gid = current_fsgid(); |
| 110 | result->i_mode = mode | S_IFDIR; |
| 111 | hpfs_write_inode_nolock(result); |
| 112 | } |
| 113 | hpfs_update_directory_times(dir); |
| 114 | d_instantiate(dentry, result); |
| 115 | hpfs_unlock(dir->i_sb); |
| 116 | return 0; |
| 117 | bail3: |
| 118 | iput(result); |
| 119 | bail2: |
| 120 | hpfs_brelse4(&qbh0); |
| 121 | hpfs_free_dnode(dir->i_sb, dno); |
| 122 | bail1: |
| 123 | brelse(bh); |
| 124 | hpfs_free_sectors(dir->i_sb, fno, 1); |
| 125 | bail: |
| 126 | hpfs_unlock(dir->i_sb); |
| 127 | return err; |
| 128 | } |
| 129 | |
| 130 | static int hpfs_create(struct inode *dir, struct dentry *dentry, umode_t mode, bool excl) |
| 131 | { |
| 132 | const unsigned char *name = dentry->d_name.name; |
| 133 | unsigned len = dentry->d_name.len; |
| 134 | struct inode *result = NULL; |
| 135 | struct buffer_head *bh; |
| 136 | struct fnode *fnode; |
| 137 | fnode_secno fno; |
| 138 | int r; |
| 139 | struct hpfs_dirent dee; |
| 140 | int err; |
| 141 | if ((err = hpfs_chk_name(name, &len))) |
| 142 | return err==-ENOENT ? -EINVAL : err; |
| 143 | hpfs_lock(dir->i_sb); |
| 144 | err = -ENOSPC; |
| 145 | fnode = hpfs_alloc_fnode(dir->i_sb, hpfs_i(dir)->i_dno, &fno, &bh); |
| 146 | if (!fnode) |
| 147 | goto bail; |
| 148 | memset(&dee, 0, sizeof dee); |
| 149 | if (!(mode & 0222)) dee.read_only = 1; |
| 150 | dee.archive = 1; |
| 151 | dee.hidden = name[0] == '.'; |
| 152 | dee.fnode = cpu_to_le32(fno); |
| 153 | dee.creation_date = dee.write_date = dee.read_date = cpu_to_le32(gmt_to_local(dir->i_sb, get_seconds())); |
| 154 | |
| 155 | result = new_inode(dir->i_sb); |
| 156 | if (!result) |
| 157 | goto bail1; |
| 158 | |
| 159 | hpfs_init_inode(result); |
| 160 | result->i_ino = fno; |
| 161 | result->i_mode |= S_IFREG; |
| 162 | result->i_mode &= ~0111; |
| 163 | result->i_op = &hpfs_file_iops; |
| 164 | result->i_fop = &hpfs_file_ops; |
| 165 | set_nlink(result, 1); |
| 166 | hpfs_i(result)->i_parent_dir = dir->i_ino; |
| 167 | result->i_ctime.tv_sec = result->i_mtime.tv_sec = result->i_atime.tv_sec = local_to_gmt(dir->i_sb, le32_to_cpu(dee.creation_date)); |
| 168 | result->i_ctime.tv_nsec = 0; |
| 169 | result->i_mtime.tv_nsec = 0; |
| 170 | result->i_atime.tv_nsec = 0; |
| 171 | hpfs_i(result)->i_ea_size = 0; |
| 172 | if (dee.read_only) |
| 173 | result->i_mode &= ~0222; |
| 174 | result->i_blocks = 1; |
| 175 | result->i_size = 0; |
| 176 | result->i_data.a_ops = &hpfs_aops; |
| 177 | hpfs_i(result)->mmu_private = 0; |
| 178 | |
| 179 | r = hpfs_add_dirent(dir, name, len, &dee); |
| 180 | if (r == 1) |
| 181 | goto bail2; |
| 182 | if (r == -1) { |
| 183 | err = -EEXIST; |
| 184 | goto bail2; |
| 185 | } |
| 186 | fnode->len = len; |
| 187 | memcpy(fnode->name, name, len > 15 ? 15 : len); |
| 188 | fnode->up = cpu_to_le32(dir->i_ino); |
| 189 | mark_buffer_dirty(bh); |
| 190 | brelse(bh); |
| 191 | |
| 192 | insert_inode_hash(result); |
| 193 | |
| 194 | if (!uid_eq(result->i_uid, current_fsuid()) || |
| 195 | !gid_eq(result->i_gid, current_fsgid()) || |
| 196 | result->i_mode != (mode | S_IFREG)) { |
| 197 | result->i_uid = current_fsuid(); |
| 198 | result->i_gid = current_fsgid(); |
| 199 | result->i_mode = mode | S_IFREG; |
| 200 | hpfs_write_inode_nolock(result); |
| 201 | } |
| 202 | hpfs_update_directory_times(dir); |
| 203 | d_instantiate(dentry, result); |
| 204 | hpfs_unlock(dir->i_sb); |
| 205 | return 0; |
| 206 | |
| 207 | bail2: |
| 208 | iput(result); |
| 209 | bail1: |
| 210 | brelse(bh); |
| 211 | hpfs_free_sectors(dir->i_sb, fno, 1); |
| 212 | bail: |
| 213 | hpfs_unlock(dir->i_sb); |
| 214 | return err; |
| 215 | } |
| 216 | |
| 217 | static int hpfs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t rdev) |
| 218 | { |
| 219 | const unsigned char *name = dentry->d_name.name; |
| 220 | unsigned len = dentry->d_name.len; |
| 221 | struct buffer_head *bh; |
| 222 | struct fnode *fnode; |
| 223 | fnode_secno fno; |
| 224 | int r; |
| 225 | struct hpfs_dirent dee; |
| 226 | struct inode *result = NULL; |
| 227 | int err; |
| 228 | if ((err = hpfs_chk_name(name, &len))) return err==-ENOENT ? -EINVAL : err; |
| 229 | if (hpfs_sb(dir->i_sb)->sb_eas < 2) return -EPERM; |
| 230 | if (!new_valid_dev(rdev)) |
| 231 | return -EINVAL; |
| 232 | hpfs_lock(dir->i_sb); |
| 233 | err = -ENOSPC; |
| 234 | fnode = hpfs_alloc_fnode(dir->i_sb, hpfs_i(dir)->i_dno, &fno, &bh); |
| 235 | if (!fnode) |
| 236 | goto bail; |
| 237 | memset(&dee, 0, sizeof dee); |
| 238 | if (!(mode & 0222)) dee.read_only = 1; |
| 239 | dee.archive = 1; |
| 240 | dee.hidden = name[0] == '.'; |
| 241 | dee.fnode = cpu_to_le32(fno); |
| 242 | dee.creation_date = dee.write_date = dee.read_date = cpu_to_le32(gmt_to_local(dir->i_sb, get_seconds())); |
| 243 | |
| 244 | result = new_inode(dir->i_sb); |
| 245 | if (!result) |
| 246 | goto bail1; |
| 247 | |
| 248 | hpfs_init_inode(result); |
| 249 | result->i_ino = fno; |
| 250 | hpfs_i(result)->i_parent_dir = dir->i_ino; |
| 251 | result->i_ctime.tv_sec = result->i_mtime.tv_sec = result->i_atime.tv_sec = local_to_gmt(dir->i_sb, le32_to_cpu(dee.creation_date)); |
| 252 | result->i_ctime.tv_nsec = 0; |
| 253 | result->i_mtime.tv_nsec = 0; |
| 254 | result->i_atime.tv_nsec = 0; |
| 255 | hpfs_i(result)->i_ea_size = 0; |
| 256 | result->i_uid = current_fsuid(); |
| 257 | result->i_gid = current_fsgid(); |
| 258 | set_nlink(result, 1); |
| 259 | result->i_size = 0; |
| 260 | result->i_blocks = 1; |
| 261 | init_special_inode(result, mode, rdev); |
| 262 | |
| 263 | r = hpfs_add_dirent(dir, name, len, &dee); |
| 264 | if (r == 1) |
| 265 | goto bail2; |
| 266 | if (r == -1) { |
| 267 | err = -EEXIST; |
| 268 | goto bail2; |
| 269 | } |
| 270 | fnode->len = len; |
| 271 | memcpy(fnode->name, name, len > 15 ? 15 : len); |
| 272 | fnode->up = cpu_to_le32(dir->i_ino); |
| 273 | mark_buffer_dirty(bh); |
| 274 | |
| 275 | insert_inode_hash(result); |
| 276 | |
| 277 | hpfs_write_inode_nolock(result); |
| 278 | hpfs_update_directory_times(dir); |
| 279 | d_instantiate(dentry, result); |
| 280 | brelse(bh); |
| 281 | hpfs_unlock(dir->i_sb); |
| 282 | return 0; |
| 283 | bail2: |
| 284 | iput(result); |
| 285 | bail1: |
| 286 | brelse(bh); |
| 287 | hpfs_free_sectors(dir->i_sb, fno, 1); |
| 288 | bail: |
| 289 | hpfs_unlock(dir->i_sb); |
| 290 | return err; |
| 291 | } |
| 292 | |
| 293 | static int hpfs_symlink(struct inode *dir, struct dentry *dentry, const char *symlink) |
| 294 | { |
| 295 | const unsigned char *name = dentry->d_name.name; |
| 296 | unsigned len = dentry->d_name.len; |
| 297 | struct buffer_head *bh; |
| 298 | struct fnode *fnode; |
| 299 | fnode_secno fno; |
| 300 | int r; |
| 301 | struct hpfs_dirent dee; |
| 302 | struct inode *result; |
| 303 | int err; |
| 304 | if ((err = hpfs_chk_name(name, &len))) return err==-ENOENT ? -EINVAL : err; |
| 305 | hpfs_lock(dir->i_sb); |
| 306 | if (hpfs_sb(dir->i_sb)->sb_eas < 2) { |
| 307 | hpfs_unlock(dir->i_sb); |
| 308 | return -EPERM; |
| 309 | } |
| 310 | err = -ENOSPC; |
| 311 | fnode = hpfs_alloc_fnode(dir->i_sb, hpfs_i(dir)->i_dno, &fno, &bh); |
| 312 | if (!fnode) |
| 313 | goto bail; |
| 314 | memset(&dee, 0, sizeof dee); |
| 315 | dee.archive = 1; |
| 316 | dee.hidden = name[0] == '.'; |
| 317 | dee.fnode = cpu_to_le32(fno); |
| 318 | dee.creation_date = dee.write_date = dee.read_date = cpu_to_le32(gmt_to_local(dir->i_sb, get_seconds())); |
| 319 | |
| 320 | result = new_inode(dir->i_sb); |
| 321 | if (!result) |
| 322 | goto bail1; |
| 323 | result->i_ino = fno; |
| 324 | hpfs_init_inode(result); |
| 325 | hpfs_i(result)->i_parent_dir = dir->i_ino; |
| 326 | result->i_ctime.tv_sec = result->i_mtime.tv_sec = result->i_atime.tv_sec = local_to_gmt(dir->i_sb, le32_to_cpu(dee.creation_date)); |
| 327 | result->i_ctime.tv_nsec = 0; |
| 328 | result->i_mtime.tv_nsec = 0; |
| 329 | result->i_atime.tv_nsec = 0; |
| 330 | hpfs_i(result)->i_ea_size = 0; |
| 331 | result->i_mode = S_IFLNK | 0777; |
| 332 | result->i_uid = current_fsuid(); |
| 333 | result->i_gid = current_fsgid(); |
| 334 | result->i_blocks = 1; |
| 335 | set_nlink(result, 1); |
| 336 | result->i_size = strlen(symlink); |
| 337 | result->i_op = &page_symlink_inode_operations; |
| 338 | result->i_data.a_ops = &hpfs_symlink_aops; |
| 339 | |
| 340 | r = hpfs_add_dirent(dir, name, len, &dee); |
| 341 | if (r == 1) |
| 342 | goto bail2; |
| 343 | if (r == -1) { |
| 344 | err = -EEXIST; |
| 345 | goto bail2; |
| 346 | } |
| 347 | fnode->len = len; |
| 348 | memcpy(fnode->name, name, len > 15 ? 15 : len); |
| 349 | fnode->up = cpu_to_le32(dir->i_ino); |
| 350 | hpfs_set_ea(result, fnode, "SYMLINK", symlink, strlen(symlink)); |
| 351 | mark_buffer_dirty(bh); |
| 352 | brelse(bh); |
| 353 | |
| 354 | insert_inode_hash(result); |
| 355 | |
| 356 | hpfs_write_inode_nolock(result); |
| 357 | hpfs_update_directory_times(dir); |
| 358 | d_instantiate(dentry, result); |
| 359 | hpfs_unlock(dir->i_sb); |
| 360 | return 0; |
| 361 | bail2: |
| 362 | iput(result); |
| 363 | bail1: |
| 364 | brelse(bh); |
| 365 | hpfs_free_sectors(dir->i_sb, fno, 1); |
| 366 | bail: |
| 367 | hpfs_unlock(dir->i_sb); |
| 368 | return err; |
| 369 | } |
| 370 | |
| 371 | static int hpfs_unlink(struct inode *dir, struct dentry *dentry) |
| 372 | { |
| 373 | const unsigned char *name = dentry->d_name.name; |
| 374 | unsigned len = dentry->d_name.len; |
| 375 | struct quad_buffer_head qbh; |
| 376 | struct hpfs_dirent *de; |
| 377 | struct inode *inode = d_inode(dentry); |
| 378 | dnode_secno dno; |
| 379 | int r; |
| 380 | int rep = 0; |
| 381 | int err; |
| 382 | |
| 383 | hpfs_lock(dir->i_sb); |
| 384 | hpfs_adjust_length(name, &len); |
| 385 | again: |
| 386 | err = -ENOENT; |
| 387 | de = map_dirent(dir, hpfs_i(dir)->i_dno, name, len, &dno, &qbh); |
| 388 | if (!de) |
| 389 | goto out; |
| 390 | |
| 391 | err = -EPERM; |
| 392 | if (de->first) |
| 393 | goto out1; |
| 394 | |
| 395 | err = -EISDIR; |
| 396 | if (de->directory) |
| 397 | goto out1; |
| 398 | |
| 399 | r = hpfs_remove_dirent(dir, dno, de, &qbh, 1); |
| 400 | switch (r) { |
| 401 | case 1: |
| 402 | hpfs_error(dir->i_sb, "there was error when removing dirent"); |
| 403 | err = -EFSERROR; |
| 404 | break; |
| 405 | case 2: /* no space for deleting, try to truncate file */ |
| 406 | |
| 407 | err = -ENOSPC; |
| 408 | if (rep++) |
| 409 | break; |
| 410 | |
| 411 | dentry_unhash(dentry); |
| 412 | if (!d_unhashed(dentry)) { |
| 413 | hpfs_unlock(dir->i_sb); |
| 414 | return -ENOSPC; |
| 415 | } |
| 416 | if (generic_permission(inode, MAY_WRITE) || |
| 417 | !S_ISREG(inode->i_mode) || |
| 418 | get_write_access(inode)) { |
| 419 | d_rehash(dentry); |
| 420 | } else { |
| 421 | struct iattr newattrs; |
| 422 | /*pr_info("truncating file before delete.\n");*/ |
| 423 | newattrs.ia_size = 0; |
| 424 | newattrs.ia_valid = ATTR_SIZE | ATTR_CTIME; |
| 425 | err = notify_change(dentry, &newattrs, NULL); |
| 426 | put_write_access(inode); |
| 427 | if (!err) |
| 428 | goto again; |
| 429 | } |
| 430 | hpfs_unlock(dir->i_sb); |
| 431 | return -ENOSPC; |
| 432 | default: |
| 433 | drop_nlink(inode); |
| 434 | err = 0; |
| 435 | } |
| 436 | goto out; |
| 437 | |
| 438 | out1: |
| 439 | hpfs_brelse4(&qbh); |
| 440 | out: |
| 441 | if (!err) |
| 442 | hpfs_update_directory_times(dir); |
| 443 | hpfs_unlock(dir->i_sb); |
| 444 | return err; |
| 445 | } |
| 446 | |
| 447 | static int hpfs_rmdir(struct inode *dir, struct dentry *dentry) |
| 448 | { |
| 449 | const unsigned char *name = dentry->d_name.name; |
| 450 | unsigned len = dentry->d_name.len; |
| 451 | struct quad_buffer_head qbh; |
| 452 | struct hpfs_dirent *de; |
| 453 | struct inode *inode = d_inode(dentry); |
| 454 | dnode_secno dno; |
| 455 | int n_items = 0; |
| 456 | int err; |
| 457 | int r; |
| 458 | |
| 459 | hpfs_adjust_length(name, &len); |
| 460 | hpfs_lock(dir->i_sb); |
| 461 | err = -ENOENT; |
| 462 | de = map_dirent(dir, hpfs_i(dir)->i_dno, name, len, &dno, &qbh); |
| 463 | if (!de) |
| 464 | goto out; |
| 465 | |
| 466 | err = -EPERM; |
| 467 | if (de->first) |
| 468 | goto out1; |
| 469 | |
| 470 | err = -ENOTDIR; |
| 471 | if (!de->directory) |
| 472 | goto out1; |
| 473 | |
| 474 | hpfs_count_dnodes(dir->i_sb, hpfs_i(inode)->i_dno, NULL, NULL, &n_items); |
| 475 | err = -ENOTEMPTY; |
| 476 | if (n_items) |
| 477 | goto out1; |
| 478 | |
| 479 | r = hpfs_remove_dirent(dir, dno, de, &qbh, 1); |
| 480 | switch (r) { |
| 481 | case 1: |
| 482 | hpfs_error(dir->i_sb, "there was error when removing dirent"); |
| 483 | err = -EFSERROR; |
| 484 | break; |
| 485 | case 2: |
| 486 | err = -ENOSPC; |
| 487 | break; |
| 488 | default: |
| 489 | drop_nlink(dir); |
| 490 | clear_nlink(inode); |
| 491 | err = 0; |
| 492 | } |
| 493 | goto out; |
| 494 | out1: |
| 495 | hpfs_brelse4(&qbh); |
| 496 | out: |
| 497 | if (!err) |
| 498 | hpfs_update_directory_times(dir); |
| 499 | hpfs_unlock(dir->i_sb); |
| 500 | return err; |
| 501 | } |
| 502 | |
| 503 | static int hpfs_symlink_readpage(struct file *file, struct page *page) |
| 504 | { |
| 505 | char *link = kmap(page); |
| 506 | struct inode *i = page->mapping->host; |
| 507 | struct fnode *fnode; |
| 508 | struct buffer_head *bh; |
| 509 | int err; |
| 510 | |
| 511 | err = -EIO; |
| 512 | hpfs_lock(i->i_sb); |
| 513 | if (!(fnode = hpfs_map_fnode(i->i_sb, i->i_ino, &bh))) |
| 514 | goto fail; |
| 515 | err = hpfs_read_ea(i->i_sb, fnode, "SYMLINK", link, PAGE_SIZE); |
| 516 | brelse(bh); |
| 517 | if (err) |
| 518 | goto fail; |
| 519 | hpfs_unlock(i->i_sb); |
| 520 | SetPageUptodate(page); |
| 521 | kunmap(page); |
| 522 | unlock_page(page); |
| 523 | return 0; |
| 524 | |
| 525 | fail: |
| 526 | hpfs_unlock(i->i_sb); |
| 527 | SetPageError(page); |
| 528 | kunmap(page); |
| 529 | unlock_page(page); |
| 530 | return err; |
| 531 | } |
| 532 | |
| 533 | const struct address_space_operations hpfs_symlink_aops = { |
| 534 | .readpage = hpfs_symlink_readpage |
| 535 | }; |
| 536 | |
| 537 | static int hpfs_rename(struct inode *old_dir, struct dentry *old_dentry, |
| 538 | struct inode *new_dir, struct dentry *new_dentry) |
| 539 | { |
| 540 | const unsigned char *old_name = old_dentry->d_name.name; |
| 541 | unsigned old_len = old_dentry->d_name.len; |
| 542 | const unsigned char *new_name = new_dentry->d_name.name; |
| 543 | unsigned new_len = new_dentry->d_name.len; |
| 544 | struct inode *i = d_inode(old_dentry); |
| 545 | struct inode *new_inode = d_inode(new_dentry); |
| 546 | struct quad_buffer_head qbh, qbh1; |
| 547 | struct hpfs_dirent *dep, *nde; |
| 548 | struct hpfs_dirent de; |
| 549 | dnode_secno dno; |
| 550 | int r; |
| 551 | struct buffer_head *bh; |
| 552 | struct fnode *fnode; |
| 553 | int err; |
| 554 | |
| 555 | if ((err = hpfs_chk_name(new_name, &new_len))) return err; |
| 556 | err = 0; |
| 557 | hpfs_adjust_length(old_name, &old_len); |
| 558 | |
| 559 | hpfs_lock(i->i_sb); |
| 560 | /* order doesn't matter, due to VFS exclusion */ |
| 561 | |
| 562 | /* Erm? Moving over the empty non-busy directory is perfectly legal */ |
| 563 | if (new_inode && S_ISDIR(new_inode->i_mode)) { |
| 564 | err = -EINVAL; |
| 565 | goto end1; |
| 566 | } |
| 567 | |
| 568 | if (!(dep = map_dirent(old_dir, hpfs_i(old_dir)->i_dno, old_name, old_len, &dno, &qbh))) { |
| 569 | hpfs_error(i->i_sb, "lookup succeeded but map dirent failed"); |
| 570 | err = -ENOENT; |
| 571 | goto end1; |
| 572 | } |
| 573 | copy_de(&de, dep); |
| 574 | de.hidden = new_name[0] == '.'; |
| 575 | |
| 576 | if (new_inode) { |
| 577 | int r; |
| 578 | if ((r = hpfs_remove_dirent(old_dir, dno, dep, &qbh, 1)) != 2) { |
| 579 | if ((nde = map_dirent(new_dir, hpfs_i(new_dir)->i_dno, new_name, new_len, NULL, &qbh1))) { |
| 580 | clear_nlink(new_inode); |
| 581 | copy_de(nde, &de); |
| 582 | memcpy(nde->name, new_name, new_len); |
| 583 | hpfs_mark_4buffers_dirty(&qbh1); |
| 584 | hpfs_brelse4(&qbh1); |
| 585 | goto end; |
| 586 | } |
| 587 | hpfs_error(new_dir->i_sb, "hpfs_rename: could not find dirent"); |
| 588 | err = -EFSERROR; |
| 589 | goto end1; |
| 590 | } |
| 591 | err = r == 2 ? -ENOSPC : r == 1 ? -EFSERROR : 0; |
| 592 | goto end1; |
| 593 | } |
| 594 | |
| 595 | if (new_dir == old_dir) hpfs_brelse4(&qbh); |
| 596 | |
| 597 | if ((r = hpfs_add_dirent(new_dir, new_name, new_len, &de))) { |
| 598 | if (r == -1) hpfs_error(new_dir->i_sb, "hpfs_rename: dirent already exists!"); |
| 599 | err = r == 1 ? -ENOSPC : -EFSERROR; |
| 600 | if (new_dir != old_dir) hpfs_brelse4(&qbh); |
| 601 | goto end1; |
| 602 | } |
| 603 | |
| 604 | if (new_dir == old_dir) |
| 605 | if (!(dep = map_dirent(old_dir, hpfs_i(old_dir)->i_dno, old_name, old_len, &dno, &qbh))) { |
| 606 | hpfs_error(i->i_sb, "lookup succeeded but map dirent failed at #2"); |
| 607 | err = -ENOENT; |
| 608 | goto end1; |
| 609 | } |
| 610 | |
| 611 | if ((r = hpfs_remove_dirent(old_dir, dno, dep, &qbh, 0))) { |
| 612 | hpfs_error(i->i_sb, "hpfs_rename: could not remove dirent"); |
| 613 | err = r == 2 ? -ENOSPC : -EFSERROR; |
| 614 | goto end1; |
| 615 | } |
| 616 | |
| 617 | end: |
| 618 | hpfs_i(i)->i_parent_dir = new_dir->i_ino; |
| 619 | if (S_ISDIR(i->i_mode)) { |
| 620 | inc_nlink(new_dir); |
| 621 | drop_nlink(old_dir); |
| 622 | } |
| 623 | if ((fnode = hpfs_map_fnode(i->i_sb, i->i_ino, &bh))) { |
| 624 | fnode->up = cpu_to_le32(new_dir->i_ino); |
| 625 | fnode->len = new_len; |
| 626 | memcpy(fnode->name, new_name, new_len>15?15:new_len); |
| 627 | if (new_len < 15) memset(&fnode->name[new_len], 0, 15 - new_len); |
| 628 | mark_buffer_dirty(bh); |
| 629 | brelse(bh); |
| 630 | } |
| 631 | end1: |
| 632 | if (!err) { |
| 633 | hpfs_update_directory_times(old_dir); |
| 634 | hpfs_update_directory_times(new_dir); |
| 635 | } |
| 636 | hpfs_unlock(i->i_sb); |
| 637 | return err; |
| 638 | } |
| 639 | |
| 640 | const struct inode_operations hpfs_dir_iops = |
| 641 | { |
| 642 | .create = hpfs_create, |
| 643 | .lookup = hpfs_lookup, |
| 644 | .unlink = hpfs_unlink, |
| 645 | .symlink = hpfs_symlink, |
| 646 | .mkdir = hpfs_mkdir, |
| 647 | .rmdir = hpfs_rmdir, |
| 648 | .mknod = hpfs_mknod, |
| 649 | .rename = hpfs_rename, |
| 650 | .setattr = hpfs_setattr, |
| 651 | }; |