| 1 | /* |
| 2 | * linux/fs/hfsplus/inode.c |
| 3 | * |
| 4 | * Copyright (C) 2001 |
| 5 | * Brad Boyer (flar@allandria.com) |
| 6 | * (C) 2003 Ardis Technologies <roman@ardistech.com> |
| 7 | * |
| 8 | * Inode handling routines |
| 9 | */ |
| 10 | |
| 11 | #include <linux/blkdev.h> |
| 12 | #include <linux/mm.h> |
| 13 | #include <linux/fs.h> |
| 14 | #include <linux/pagemap.h> |
| 15 | #include <linux/mpage.h> |
| 16 | #include <linux/sched.h> |
| 17 | #include <linux/aio.h> |
| 18 | |
| 19 | #include "hfsplus_fs.h" |
| 20 | #include "hfsplus_raw.h" |
| 21 | #include "xattr.h" |
| 22 | #include "acl.h" |
| 23 | |
| 24 | static int hfsplus_readpage(struct file *file, struct page *page) |
| 25 | { |
| 26 | return block_read_full_page(page, hfsplus_get_block); |
| 27 | } |
| 28 | |
| 29 | static int hfsplus_writepage(struct page *page, struct writeback_control *wbc) |
| 30 | { |
| 31 | return block_write_full_page(page, hfsplus_get_block, wbc); |
| 32 | } |
| 33 | |
| 34 | static void hfsplus_write_failed(struct address_space *mapping, loff_t to) |
| 35 | { |
| 36 | struct inode *inode = mapping->host; |
| 37 | |
| 38 | if (to > inode->i_size) { |
| 39 | truncate_pagecache(inode, inode->i_size); |
| 40 | hfsplus_file_truncate(inode); |
| 41 | } |
| 42 | } |
| 43 | |
| 44 | static int hfsplus_write_begin(struct file *file, struct address_space *mapping, |
| 45 | loff_t pos, unsigned len, unsigned flags, |
| 46 | struct page **pagep, void **fsdata) |
| 47 | { |
| 48 | int ret; |
| 49 | |
| 50 | *pagep = NULL; |
| 51 | ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata, |
| 52 | hfsplus_get_block, |
| 53 | &HFSPLUS_I(mapping->host)->phys_size); |
| 54 | if (unlikely(ret)) |
| 55 | hfsplus_write_failed(mapping, pos + len); |
| 56 | |
| 57 | return ret; |
| 58 | } |
| 59 | |
| 60 | static sector_t hfsplus_bmap(struct address_space *mapping, sector_t block) |
| 61 | { |
| 62 | return generic_block_bmap(mapping, block, hfsplus_get_block); |
| 63 | } |
| 64 | |
| 65 | static int hfsplus_releasepage(struct page *page, gfp_t mask) |
| 66 | { |
| 67 | struct inode *inode = page->mapping->host; |
| 68 | struct super_block *sb = inode->i_sb; |
| 69 | struct hfs_btree *tree; |
| 70 | struct hfs_bnode *node; |
| 71 | u32 nidx; |
| 72 | int i, res = 1; |
| 73 | |
| 74 | switch (inode->i_ino) { |
| 75 | case HFSPLUS_EXT_CNID: |
| 76 | tree = HFSPLUS_SB(sb)->ext_tree; |
| 77 | break; |
| 78 | case HFSPLUS_CAT_CNID: |
| 79 | tree = HFSPLUS_SB(sb)->cat_tree; |
| 80 | break; |
| 81 | case HFSPLUS_ATTR_CNID: |
| 82 | tree = HFSPLUS_SB(sb)->attr_tree; |
| 83 | break; |
| 84 | default: |
| 85 | BUG(); |
| 86 | return 0; |
| 87 | } |
| 88 | if (!tree) |
| 89 | return 0; |
| 90 | if (tree->node_size >= PAGE_CACHE_SIZE) { |
| 91 | nidx = page->index >> |
| 92 | (tree->node_size_shift - PAGE_CACHE_SHIFT); |
| 93 | spin_lock(&tree->hash_lock); |
| 94 | node = hfs_bnode_findhash(tree, nidx); |
| 95 | if (!node) |
| 96 | ; |
| 97 | else if (atomic_read(&node->refcnt)) |
| 98 | res = 0; |
| 99 | if (res && node) { |
| 100 | hfs_bnode_unhash(node); |
| 101 | hfs_bnode_free(node); |
| 102 | } |
| 103 | spin_unlock(&tree->hash_lock); |
| 104 | } else { |
| 105 | nidx = page->index << |
| 106 | (PAGE_CACHE_SHIFT - tree->node_size_shift); |
| 107 | i = 1 << (PAGE_CACHE_SHIFT - tree->node_size_shift); |
| 108 | spin_lock(&tree->hash_lock); |
| 109 | do { |
| 110 | node = hfs_bnode_findhash(tree, nidx++); |
| 111 | if (!node) |
| 112 | continue; |
| 113 | if (atomic_read(&node->refcnt)) { |
| 114 | res = 0; |
| 115 | break; |
| 116 | } |
| 117 | hfs_bnode_unhash(node); |
| 118 | hfs_bnode_free(node); |
| 119 | } while (--i && nidx < tree->node_count); |
| 120 | spin_unlock(&tree->hash_lock); |
| 121 | } |
| 122 | return res ? try_to_free_buffers(page) : 0; |
| 123 | } |
| 124 | |
| 125 | static ssize_t hfsplus_direct_IO(int rw, struct kiocb *iocb, |
| 126 | struct iov_iter *iter, loff_t offset) |
| 127 | { |
| 128 | struct file *file = iocb->ki_filp; |
| 129 | struct address_space *mapping = file->f_mapping; |
| 130 | struct inode *inode = file_inode(file)->i_mapping->host; |
| 131 | size_t count = iov_iter_count(iter); |
| 132 | ssize_t ret; |
| 133 | |
| 134 | ret = blockdev_direct_IO(rw, iocb, inode, iter, offset, |
| 135 | hfsplus_get_block); |
| 136 | |
| 137 | /* |
| 138 | * In case of error extending write may have instantiated a few |
| 139 | * blocks outside i_size. Trim these off again. |
| 140 | */ |
| 141 | if (unlikely((rw & WRITE) && ret < 0)) { |
| 142 | loff_t isize = i_size_read(inode); |
| 143 | loff_t end = offset + count; |
| 144 | |
| 145 | if (end > isize) |
| 146 | hfsplus_write_failed(mapping, end); |
| 147 | } |
| 148 | |
| 149 | return ret; |
| 150 | } |
| 151 | |
| 152 | static int hfsplus_writepages(struct address_space *mapping, |
| 153 | struct writeback_control *wbc) |
| 154 | { |
| 155 | return mpage_writepages(mapping, wbc, hfsplus_get_block); |
| 156 | } |
| 157 | |
| 158 | const struct address_space_operations hfsplus_btree_aops = { |
| 159 | .readpage = hfsplus_readpage, |
| 160 | .writepage = hfsplus_writepage, |
| 161 | .write_begin = hfsplus_write_begin, |
| 162 | .write_end = generic_write_end, |
| 163 | .bmap = hfsplus_bmap, |
| 164 | .releasepage = hfsplus_releasepage, |
| 165 | }; |
| 166 | |
| 167 | const struct address_space_operations hfsplus_aops = { |
| 168 | .readpage = hfsplus_readpage, |
| 169 | .writepage = hfsplus_writepage, |
| 170 | .write_begin = hfsplus_write_begin, |
| 171 | .write_end = generic_write_end, |
| 172 | .bmap = hfsplus_bmap, |
| 173 | .direct_IO = hfsplus_direct_IO, |
| 174 | .writepages = hfsplus_writepages, |
| 175 | }; |
| 176 | |
| 177 | const struct dentry_operations hfsplus_dentry_operations = { |
| 178 | .d_hash = hfsplus_hash_dentry, |
| 179 | .d_compare = hfsplus_compare_dentry, |
| 180 | }; |
| 181 | |
| 182 | static void hfsplus_get_perms(struct inode *inode, |
| 183 | struct hfsplus_perm *perms, int dir) |
| 184 | { |
| 185 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb); |
| 186 | u16 mode; |
| 187 | |
| 188 | mode = be16_to_cpu(perms->mode); |
| 189 | |
| 190 | i_uid_write(inode, be32_to_cpu(perms->owner)); |
| 191 | if (!i_uid_read(inode) && !mode) |
| 192 | inode->i_uid = sbi->uid; |
| 193 | |
| 194 | i_gid_write(inode, be32_to_cpu(perms->group)); |
| 195 | if (!i_gid_read(inode) && !mode) |
| 196 | inode->i_gid = sbi->gid; |
| 197 | |
| 198 | if (dir) { |
| 199 | mode = mode ? (mode & S_IALLUGO) : (S_IRWXUGO & ~(sbi->umask)); |
| 200 | mode |= S_IFDIR; |
| 201 | } else if (!mode) |
| 202 | mode = S_IFREG | ((S_IRUGO|S_IWUGO) & ~(sbi->umask)); |
| 203 | inode->i_mode = mode; |
| 204 | |
| 205 | HFSPLUS_I(inode)->userflags = perms->userflags; |
| 206 | if (perms->rootflags & HFSPLUS_FLG_IMMUTABLE) |
| 207 | inode->i_flags |= S_IMMUTABLE; |
| 208 | else |
| 209 | inode->i_flags &= ~S_IMMUTABLE; |
| 210 | if (perms->rootflags & HFSPLUS_FLG_APPEND) |
| 211 | inode->i_flags |= S_APPEND; |
| 212 | else |
| 213 | inode->i_flags &= ~S_APPEND; |
| 214 | } |
| 215 | |
| 216 | static int hfsplus_file_open(struct inode *inode, struct file *file) |
| 217 | { |
| 218 | if (HFSPLUS_IS_RSRC(inode)) |
| 219 | inode = HFSPLUS_I(inode)->rsrc_inode; |
| 220 | if (!(file->f_flags & O_LARGEFILE) && i_size_read(inode) > MAX_NON_LFS) |
| 221 | return -EOVERFLOW; |
| 222 | atomic_inc(&HFSPLUS_I(inode)->opencnt); |
| 223 | return 0; |
| 224 | } |
| 225 | |
| 226 | static int hfsplus_file_release(struct inode *inode, struct file *file) |
| 227 | { |
| 228 | struct super_block *sb = inode->i_sb; |
| 229 | |
| 230 | if (HFSPLUS_IS_RSRC(inode)) |
| 231 | inode = HFSPLUS_I(inode)->rsrc_inode; |
| 232 | if (atomic_dec_and_test(&HFSPLUS_I(inode)->opencnt)) { |
| 233 | mutex_lock(&inode->i_mutex); |
| 234 | hfsplus_file_truncate(inode); |
| 235 | if (inode->i_flags & S_DEAD) { |
| 236 | hfsplus_delete_cat(inode->i_ino, |
| 237 | HFSPLUS_SB(sb)->hidden_dir, NULL); |
| 238 | hfsplus_delete_inode(inode); |
| 239 | } |
| 240 | mutex_unlock(&inode->i_mutex); |
| 241 | } |
| 242 | return 0; |
| 243 | } |
| 244 | |
| 245 | static int hfsplus_setattr(struct dentry *dentry, struct iattr *attr) |
| 246 | { |
| 247 | struct inode *inode = dentry->d_inode; |
| 248 | int error; |
| 249 | |
| 250 | error = inode_change_ok(inode, attr); |
| 251 | if (error) |
| 252 | return error; |
| 253 | |
| 254 | if ((attr->ia_valid & ATTR_SIZE) && |
| 255 | attr->ia_size != i_size_read(inode)) { |
| 256 | inode_dio_wait(inode); |
| 257 | truncate_setsize(inode, attr->ia_size); |
| 258 | hfsplus_file_truncate(inode); |
| 259 | } |
| 260 | |
| 261 | setattr_copy(inode, attr); |
| 262 | mark_inode_dirty(inode); |
| 263 | |
| 264 | if (attr->ia_valid & ATTR_MODE) { |
| 265 | error = posix_acl_chmod(inode, inode->i_mode); |
| 266 | if (unlikely(error)) |
| 267 | return error; |
| 268 | } |
| 269 | |
| 270 | return 0; |
| 271 | } |
| 272 | |
| 273 | int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end, |
| 274 | int datasync) |
| 275 | { |
| 276 | struct inode *inode = file->f_mapping->host; |
| 277 | struct hfsplus_inode_info *hip = HFSPLUS_I(inode); |
| 278 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb); |
| 279 | int error = 0, error2; |
| 280 | |
| 281 | error = filemap_write_and_wait_range(inode->i_mapping, start, end); |
| 282 | if (error) |
| 283 | return error; |
| 284 | mutex_lock(&inode->i_mutex); |
| 285 | |
| 286 | /* |
| 287 | * Sync inode metadata into the catalog and extent trees. |
| 288 | */ |
| 289 | sync_inode_metadata(inode, 1); |
| 290 | |
| 291 | /* |
| 292 | * And explicitly write out the btrees. |
| 293 | */ |
| 294 | if (test_and_clear_bit(HFSPLUS_I_CAT_DIRTY, &hip->flags)) |
| 295 | error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping); |
| 296 | |
| 297 | if (test_and_clear_bit(HFSPLUS_I_EXT_DIRTY, &hip->flags)) { |
| 298 | error2 = |
| 299 | filemap_write_and_wait(sbi->ext_tree->inode->i_mapping); |
| 300 | if (!error) |
| 301 | error = error2; |
| 302 | } |
| 303 | |
| 304 | if (test_and_clear_bit(HFSPLUS_I_ATTR_DIRTY, &hip->flags)) { |
| 305 | if (sbi->attr_tree) { |
| 306 | error2 = |
| 307 | filemap_write_and_wait( |
| 308 | sbi->attr_tree->inode->i_mapping); |
| 309 | if (!error) |
| 310 | error = error2; |
| 311 | } else { |
| 312 | pr_err("sync non-existent attributes tree\n"); |
| 313 | } |
| 314 | } |
| 315 | |
| 316 | if (test_and_clear_bit(HFSPLUS_I_ALLOC_DIRTY, &hip->flags)) { |
| 317 | error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping); |
| 318 | if (!error) |
| 319 | error = error2; |
| 320 | } |
| 321 | |
| 322 | if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags)) |
| 323 | blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL); |
| 324 | |
| 325 | mutex_unlock(&inode->i_mutex); |
| 326 | |
| 327 | return error; |
| 328 | } |
| 329 | |
| 330 | static const struct inode_operations hfsplus_file_inode_operations = { |
| 331 | .setattr = hfsplus_setattr, |
| 332 | .setxattr = generic_setxattr, |
| 333 | .getxattr = generic_getxattr, |
| 334 | .listxattr = hfsplus_listxattr, |
| 335 | .removexattr = generic_removexattr, |
| 336 | #ifdef CONFIG_HFSPLUS_FS_POSIX_ACL |
| 337 | .get_acl = hfsplus_get_posix_acl, |
| 338 | .set_acl = hfsplus_set_posix_acl, |
| 339 | #endif |
| 340 | }; |
| 341 | |
| 342 | static const struct file_operations hfsplus_file_operations = { |
| 343 | .llseek = generic_file_llseek, |
| 344 | .read = new_sync_read, |
| 345 | .read_iter = generic_file_read_iter, |
| 346 | .write = new_sync_write, |
| 347 | .write_iter = generic_file_write_iter, |
| 348 | .mmap = generic_file_mmap, |
| 349 | .splice_read = generic_file_splice_read, |
| 350 | .fsync = hfsplus_file_fsync, |
| 351 | .open = hfsplus_file_open, |
| 352 | .release = hfsplus_file_release, |
| 353 | .unlocked_ioctl = hfsplus_ioctl, |
| 354 | }; |
| 355 | |
| 356 | struct inode *hfsplus_new_inode(struct super_block *sb, umode_t mode) |
| 357 | { |
| 358 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); |
| 359 | struct inode *inode = new_inode(sb); |
| 360 | struct hfsplus_inode_info *hip; |
| 361 | |
| 362 | if (!inode) |
| 363 | return NULL; |
| 364 | |
| 365 | inode->i_ino = sbi->next_cnid++; |
| 366 | inode->i_mode = mode; |
| 367 | inode->i_uid = current_fsuid(); |
| 368 | inode->i_gid = current_fsgid(); |
| 369 | set_nlink(inode, 1); |
| 370 | inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC; |
| 371 | |
| 372 | hip = HFSPLUS_I(inode); |
| 373 | INIT_LIST_HEAD(&hip->open_dir_list); |
| 374 | mutex_init(&hip->extents_lock); |
| 375 | atomic_set(&hip->opencnt, 0); |
| 376 | hip->extent_state = 0; |
| 377 | hip->flags = 0; |
| 378 | hip->userflags = 0; |
| 379 | hip->subfolders = 0; |
| 380 | memset(hip->first_extents, 0, sizeof(hfsplus_extent_rec)); |
| 381 | memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec)); |
| 382 | hip->alloc_blocks = 0; |
| 383 | hip->first_blocks = 0; |
| 384 | hip->cached_start = 0; |
| 385 | hip->cached_blocks = 0; |
| 386 | hip->phys_size = 0; |
| 387 | hip->fs_blocks = 0; |
| 388 | hip->rsrc_inode = NULL; |
| 389 | if (S_ISDIR(inode->i_mode)) { |
| 390 | inode->i_size = 2; |
| 391 | sbi->folder_count++; |
| 392 | inode->i_op = &hfsplus_dir_inode_operations; |
| 393 | inode->i_fop = &hfsplus_dir_operations; |
| 394 | } else if (S_ISREG(inode->i_mode)) { |
| 395 | sbi->file_count++; |
| 396 | inode->i_op = &hfsplus_file_inode_operations; |
| 397 | inode->i_fop = &hfsplus_file_operations; |
| 398 | inode->i_mapping->a_ops = &hfsplus_aops; |
| 399 | hip->clump_blocks = sbi->data_clump_blocks; |
| 400 | } else if (S_ISLNK(inode->i_mode)) { |
| 401 | sbi->file_count++; |
| 402 | inode->i_op = &page_symlink_inode_operations; |
| 403 | inode->i_mapping->a_ops = &hfsplus_aops; |
| 404 | hip->clump_blocks = 1; |
| 405 | } else |
| 406 | sbi->file_count++; |
| 407 | insert_inode_hash(inode); |
| 408 | mark_inode_dirty(inode); |
| 409 | hfsplus_mark_mdb_dirty(sb); |
| 410 | |
| 411 | return inode; |
| 412 | } |
| 413 | |
| 414 | void hfsplus_delete_inode(struct inode *inode) |
| 415 | { |
| 416 | struct super_block *sb = inode->i_sb; |
| 417 | |
| 418 | if (S_ISDIR(inode->i_mode)) { |
| 419 | HFSPLUS_SB(sb)->folder_count--; |
| 420 | hfsplus_mark_mdb_dirty(sb); |
| 421 | return; |
| 422 | } |
| 423 | HFSPLUS_SB(sb)->file_count--; |
| 424 | if (S_ISREG(inode->i_mode)) { |
| 425 | if (!inode->i_nlink) { |
| 426 | inode->i_size = 0; |
| 427 | hfsplus_file_truncate(inode); |
| 428 | } |
| 429 | } else if (S_ISLNK(inode->i_mode)) { |
| 430 | inode->i_size = 0; |
| 431 | hfsplus_file_truncate(inode); |
| 432 | } |
| 433 | hfsplus_mark_mdb_dirty(sb); |
| 434 | } |
| 435 | |
| 436 | void hfsplus_inode_read_fork(struct inode *inode, struct hfsplus_fork_raw *fork) |
| 437 | { |
| 438 | struct super_block *sb = inode->i_sb; |
| 439 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); |
| 440 | struct hfsplus_inode_info *hip = HFSPLUS_I(inode); |
| 441 | u32 count; |
| 442 | int i; |
| 443 | |
| 444 | memcpy(&hip->first_extents, &fork->extents, sizeof(hfsplus_extent_rec)); |
| 445 | for (count = 0, i = 0; i < 8; i++) |
| 446 | count += be32_to_cpu(fork->extents[i].block_count); |
| 447 | hip->first_blocks = count; |
| 448 | memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec)); |
| 449 | hip->cached_start = 0; |
| 450 | hip->cached_blocks = 0; |
| 451 | |
| 452 | hip->alloc_blocks = be32_to_cpu(fork->total_blocks); |
| 453 | hip->phys_size = inode->i_size = be64_to_cpu(fork->total_size); |
| 454 | hip->fs_blocks = |
| 455 | (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits; |
| 456 | inode_set_bytes(inode, hip->fs_blocks << sb->s_blocksize_bits); |
| 457 | hip->clump_blocks = |
| 458 | be32_to_cpu(fork->clump_size) >> sbi->alloc_blksz_shift; |
| 459 | if (!hip->clump_blocks) { |
| 460 | hip->clump_blocks = HFSPLUS_IS_RSRC(inode) ? |
| 461 | sbi->rsrc_clump_blocks : |
| 462 | sbi->data_clump_blocks; |
| 463 | } |
| 464 | } |
| 465 | |
| 466 | void hfsplus_inode_write_fork(struct inode *inode, |
| 467 | struct hfsplus_fork_raw *fork) |
| 468 | { |
| 469 | memcpy(&fork->extents, &HFSPLUS_I(inode)->first_extents, |
| 470 | sizeof(hfsplus_extent_rec)); |
| 471 | fork->total_size = cpu_to_be64(inode->i_size); |
| 472 | fork->total_blocks = cpu_to_be32(HFSPLUS_I(inode)->alloc_blocks); |
| 473 | } |
| 474 | |
| 475 | int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd) |
| 476 | { |
| 477 | hfsplus_cat_entry entry; |
| 478 | int res = 0; |
| 479 | u16 type; |
| 480 | |
| 481 | type = hfs_bnode_read_u16(fd->bnode, fd->entryoffset); |
| 482 | |
| 483 | HFSPLUS_I(inode)->linkid = 0; |
| 484 | if (type == HFSPLUS_FOLDER) { |
| 485 | struct hfsplus_cat_folder *folder = &entry.folder; |
| 486 | |
| 487 | if (fd->entrylength < sizeof(struct hfsplus_cat_folder)) |
| 488 | /* panic? */; |
| 489 | hfs_bnode_read(fd->bnode, &entry, fd->entryoffset, |
| 490 | sizeof(struct hfsplus_cat_folder)); |
| 491 | hfsplus_get_perms(inode, &folder->permissions, 1); |
| 492 | set_nlink(inode, 1); |
| 493 | inode->i_size = 2 + be32_to_cpu(folder->valence); |
| 494 | inode->i_atime = hfsp_mt2ut(folder->access_date); |
| 495 | inode->i_mtime = hfsp_mt2ut(folder->content_mod_date); |
| 496 | inode->i_ctime = hfsp_mt2ut(folder->attribute_mod_date); |
| 497 | HFSPLUS_I(inode)->create_date = folder->create_date; |
| 498 | HFSPLUS_I(inode)->fs_blocks = 0; |
| 499 | if (folder->flags & cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT)) { |
| 500 | HFSPLUS_I(inode)->subfolders = |
| 501 | be32_to_cpu(folder->subfolders); |
| 502 | } |
| 503 | inode->i_op = &hfsplus_dir_inode_operations; |
| 504 | inode->i_fop = &hfsplus_dir_operations; |
| 505 | } else if (type == HFSPLUS_FILE) { |
| 506 | struct hfsplus_cat_file *file = &entry.file; |
| 507 | |
| 508 | if (fd->entrylength < sizeof(struct hfsplus_cat_file)) |
| 509 | /* panic? */; |
| 510 | hfs_bnode_read(fd->bnode, &entry, fd->entryoffset, |
| 511 | sizeof(struct hfsplus_cat_file)); |
| 512 | |
| 513 | hfsplus_inode_read_fork(inode, HFSPLUS_IS_RSRC(inode) ? |
| 514 | &file->rsrc_fork : &file->data_fork); |
| 515 | hfsplus_get_perms(inode, &file->permissions, 0); |
| 516 | set_nlink(inode, 1); |
| 517 | if (S_ISREG(inode->i_mode)) { |
| 518 | if (file->permissions.dev) |
| 519 | set_nlink(inode, |
| 520 | be32_to_cpu(file->permissions.dev)); |
| 521 | inode->i_op = &hfsplus_file_inode_operations; |
| 522 | inode->i_fop = &hfsplus_file_operations; |
| 523 | inode->i_mapping->a_ops = &hfsplus_aops; |
| 524 | } else if (S_ISLNK(inode->i_mode)) { |
| 525 | inode->i_op = &page_symlink_inode_operations; |
| 526 | inode->i_mapping->a_ops = &hfsplus_aops; |
| 527 | } else { |
| 528 | init_special_inode(inode, inode->i_mode, |
| 529 | be32_to_cpu(file->permissions.dev)); |
| 530 | } |
| 531 | inode->i_atime = hfsp_mt2ut(file->access_date); |
| 532 | inode->i_mtime = hfsp_mt2ut(file->content_mod_date); |
| 533 | inode->i_ctime = hfsp_mt2ut(file->attribute_mod_date); |
| 534 | HFSPLUS_I(inode)->create_date = file->create_date; |
| 535 | } else { |
| 536 | pr_err("bad catalog entry used to create inode\n"); |
| 537 | res = -EIO; |
| 538 | } |
| 539 | return res; |
| 540 | } |
| 541 | |
| 542 | int hfsplus_cat_write_inode(struct inode *inode) |
| 543 | { |
| 544 | struct inode *main_inode = inode; |
| 545 | struct hfs_find_data fd; |
| 546 | hfsplus_cat_entry entry; |
| 547 | |
| 548 | if (HFSPLUS_IS_RSRC(inode)) |
| 549 | main_inode = HFSPLUS_I(inode)->rsrc_inode; |
| 550 | |
| 551 | if (!main_inode->i_nlink) |
| 552 | return 0; |
| 553 | |
| 554 | if (hfs_find_init(HFSPLUS_SB(main_inode->i_sb)->cat_tree, &fd)) |
| 555 | /* panic? */ |
| 556 | return -EIO; |
| 557 | |
| 558 | if (hfsplus_find_cat(main_inode->i_sb, main_inode->i_ino, &fd)) |
| 559 | /* panic? */ |
| 560 | goto out; |
| 561 | |
| 562 | if (S_ISDIR(main_inode->i_mode)) { |
| 563 | struct hfsplus_cat_folder *folder = &entry.folder; |
| 564 | |
| 565 | if (fd.entrylength < sizeof(struct hfsplus_cat_folder)) |
| 566 | /* panic? */; |
| 567 | hfs_bnode_read(fd.bnode, &entry, fd.entryoffset, |
| 568 | sizeof(struct hfsplus_cat_folder)); |
| 569 | /* simple node checks? */ |
| 570 | hfsplus_cat_set_perms(inode, &folder->permissions); |
| 571 | folder->access_date = hfsp_ut2mt(inode->i_atime); |
| 572 | folder->content_mod_date = hfsp_ut2mt(inode->i_mtime); |
| 573 | folder->attribute_mod_date = hfsp_ut2mt(inode->i_ctime); |
| 574 | folder->valence = cpu_to_be32(inode->i_size - 2); |
| 575 | if (folder->flags & cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT)) { |
| 576 | folder->subfolders = |
| 577 | cpu_to_be32(HFSPLUS_I(inode)->subfolders); |
| 578 | } |
| 579 | hfs_bnode_write(fd.bnode, &entry, fd.entryoffset, |
| 580 | sizeof(struct hfsplus_cat_folder)); |
| 581 | } else if (HFSPLUS_IS_RSRC(inode)) { |
| 582 | struct hfsplus_cat_file *file = &entry.file; |
| 583 | hfs_bnode_read(fd.bnode, &entry, fd.entryoffset, |
| 584 | sizeof(struct hfsplus_cat_file)); |
| 585 | hfsplus_inode_write_fork(inode, &file->rsrc_fork); |
| 586 | hfs_bnode_write(fd.bnode, &entry, fd.entryoffset, |
| 587 | sizeof(struct hfsplus_cat_file)); |
| 588 | } else { |
| 589 | struct hfsplus_cat_file *file = &entry.file; |
| 590 | |
| 591 | if (fd.entrylength < sizeof(struct hfsplus_cat_file)) |
| 592 | /* panic? */; |
| 593 | hfs_bnode_read(fd.bnode, &entry, fd.entryoffset, |
| 594 | sizeof(struct hfsplus_cat_file)); |
| 595 | hfsplus_inode_write_fork(inode, &file->data_fork); |
| 596 | hfsplus_cat_set_perms(inode, &file->permissions); |
| 597 | if (HFSPLUS_FLG_IMMUTABLE & |
| 598 | (file->permissions.rootflags | |
| 599 | file->permissions.userflags)) |
| 600 | file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED); |
| 601 | else |
| 602 | file->flags &= cpu_to_be16(~HFSPLUS_FILE_LOCKED); |
| 603 | file->access_date = hfsp_ut2mt(inode->i_atime); |
| 604 | file->content_mod_date = hfsp_ut2mt(inode->i_mtime); |
| 605 | file->attribute_mod_date = hfsp_ut2mt(inode->i_ctime); |
| 606 | hfs_bnode_write(fd.bnode, &entry, fd.entryoffset, |
| 607 | sizeof(struct hfsplus_cat_file)); |
| 608 | } |
| 609 | |
| 610 | set_bit(HFSPLUS_I_CAT_DIRTY, &HFSPLUS_I(inode)->flags); |
| 611 | out: |
| 612 | hfs_find_exit(&fd); |
| 613 | return 0; |
| 614 | } |