| 1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | /* |
| 3 | * linux/fs/hfsplus/inode.c |
| 4 | * |
| 5 | * Copyright (C) 2001 |
| 6 | * Brad Boyer (flar@allandria.com) |
| 7 | * (C) 2003 Ardis Technologies <roman@ardistech.com> |
| 8 | * |
| 9 | * Inode handling routines |
| 10 | */ |
| 11 | |
| 12 | #include <linux/blkdev.h> |
| 13 | #include <linux/mm.h> |
| 14 | #include <linux/fs.h> |
| 15 | #include <linux/pagemap.h> |
| 16 | #include <linux/mpage.h> |
| 17 | #include <linux/sched.h> |
| 18 | #include <linux/cred.h> |
| 19 | #include <linux/uio.h> |
| 20 | #include <linux/fileattr.h> |
| 21 | |
| 22 | #include "hfsplus_fs.h" |
| 23 | #include "hfsplus_raw.h" |
| 24 | #include "xattr.h" |
| 25 | |
| 26 | static int hfsplus_readpage(struct file *file, struct page *page) |
| 27 | { |
| 28 | return block_read_full_page(page, hfsplus_get_block); |
| 29 | } |
| 30 | |
| 31 | static int hfsplus_writepage(struct page *page, struct writeback_control *wbc) |
| 32 | { |
| 33 | return block_write_full_page(page, hfsplus_get_block, wbc); |
| 34 | } |
| 35 | |
| 36 | static void hfsplus_write_failed(struct address_space *mapping, loff_t to) |
| 37 | { |
| 38 | struct inode *inode = mapping->host; |
| 39 | |
| 40 | if (to > inode->i_size) { |
| 41 | truncate_pagecache(inode, inode->i_size); |
| 42 | hfsplus_file_truncate(inode); |
| 43 | } |
| 44 | } |
| 45 | |
| 46 | static int hfsplus_write_begin(struct file *file, struct address_space *mapping, |
| 47 | loff_t pos, unsigned len, unsigned flags, |
| 48 | struct page **pagep, void **fsdata) |
| 49 | { |
| 50 | int ret; |
| 51 | |
| 52 | *pagep = NULL; |
| 53 | ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata, |
| 54 | hfsplus_get_block, |
| 55 | &HFSPLUS_I(mapping->host)->phys_size); |
| 56 | if (unlikely(ret)) |
| 57 | hfsplus_write_failed(mapping, pos + len); |
| 58 | |
| 59 | return ret; |
| 60 | } |
| 61 | |
| 62 | static sector_t hfsplus_bmap(struct address_space *mapping, sector_t block) |
| 63 | { |
| 64 | return generic_block_bmap(mapping, block, hfsplus_get_block); |
| 65 | } |
| 66 | |
| 67 | static int hfsplus_releasepage(struct page *page, gfp_t mask) |
| 68 | { |
| 69 | struct inode *inode = page->mapping->host; |
| 70 | struct super_block *sb = inode->i_sb; |
| 71 | struct hfs_btree *tree; |
| 72 | struct hfs_bnode *node; |
| 73 | u32 nidx; |
| 74 | int i, res = 1; |
| 75 | |
| 76 | switch (inode->i_ino) { |
| 77 | case HFSPLUS_EXT_CNID: |
| 78 | tree = HFSPLUS_SB(sb)->ext_tree; |
| 79 | break; |
| 80 | case HFSPLUS_CAT_CNID: |
| 81 | tree = HFSPLUS_SB(sb)->cat_tree; |
| 82 | break; |
| 83 | case HFSPLUS_ATTR_CNID: |
| 84 | tree = HFSPLUS_SB(sb)->attr_tree; |
| 85 | break; |
| 86 | default: |
| 87 | BUG(); |
| 88 | return 0; |
| 89 | } |
| 90 | if (!tree) |
| 91 | return 0; |
| 92 | if (tree->node_size >= PAGE_SIZE) { |
| 93 | nidx = page->index >> |
| 94 | (tree->node_size_shift - PAGE_SHIFT); |
| 95 | spin_lock(&tree->hash_lock); |
| 96 | node = hfs_bnode_findhash(tree, nidx); |
| 97 | if (!node) |
| 98 | ; |
| 99 | else if (atomic_read(&node->refcnt)) |
| 100 | res = 0; |
| 101 | if (res && node) { |
| 102 | hfs_bnode_unhash(node); |
| 103 | hfs_bnode_free(node); |
| 104 | } |
| 105 | spin_unlock(&tree->hash_lock); |
| 106 | } else { |
| 107 | nidx = page->index << |
| 108 | (PAGE_SHIFT - tree->node_size_shift); |
| 109 | i = 1 << (PAGE_SHIFT - tree->node_size_shift); |
| 110 | spin_lock(&tree->hash_lock); |
| 111 | do { |
| 112 | node = hfs_bnode_findhash(tree, nidx++); |
| 113 | if (!node) |
| 114 | continue; |
| 115 | if (atomic_read(&node->refcnt)) { |
| 116 | res = 0; |
| 117 | break; |
| 118 | } |
| 119 | hfs_bnode_unhash(node); |
| 120 | hfs_bnode_free(node); |
| 121 | } while (--i && nidx < tree->node_count); |
| 122 | spin_unlock(&tree->hash_lock); |
| 123 | } |
| 124 | return res ? try_to_free_buffers(page) : 0; |
| 125 | } |
| 126 | |
| 127 | static ssize_t hfsplus_direct_IO(struct kiocb *iocb, struct iov_iter *iter) |
| 128 | { |
| 129 | struct file *file = iocb->ki_filp; |
| 130 | struct address_space *mapping = file->f_mapping; |
| 131 | struct inode *inode = mapping->host; |
| 132 | size_t count = iov_iter_count(iter); |
| 133 | ssize_t ret; |
| 134 | |
| 135 | ret = blockdev_direct_IO(iocb, inode, iter, 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(iov_iter_rw(iter) == WRITE && ret < 0)) { |
| 142 | loff_t isize = i_size_read(inode); |
| 143 | loff_t end = iocb->ki_pos + 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 | .dirty_folio = block_dirty_folio, |
| 160 | .invalidate_folio = block_invalidate_folio, |
| 161 | .readpage = hfsplus_readpage, |
| 162 | .writepage = hfsplus_writepage, |
| 163 | .write_begin = hfsplus_write_begin, |
| 164 | .write_end = generic_write_end, |
| 165 | .bmap = hfsplus_bmap, |
| 166 | .releasepage = hfsplus_releasepage, |
| 167 | }; |
| 168 | |
| 169 | const struct address_space_operations hfsplus_aops = { |
| 170 | .dirty_folio = block_dirty_folio, |
| 171 | .invalidate_folio = block_invalidate_folio, |
| 172 | .readpage = hfsplus_readpage, |
| 173 | .writepage = hfsplus_writepage, |
| 174 | .write_begin = hfsplus_write_begin, |
| 175 | .write_end = generic_write_end, |
| 176 | .bmap = hfsplus_bmap, |
| 177 | .direct_IO = hfsplus_direct_IO, |
| 178 | .writepages = hfsplus_writepages, |
| 179 | }; |
| 180 | |
| 181 | const struct dentry_operations hfsplus_dentry_operations = { |
| 182 | .d_hash = hfsplus_hash_dentry, |
| 183 | .d_compare = hfsplus_compare_dentry, |
| 184 | }; |
| 185 | |
| 186 | static void hfsplus_get_perms(struct inode *inode, |
| 187 | struct hfsplus_perm *perms, int dir) |
| 188 | { |
| 189 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb); |
| 190 | u16 mode; |
| 191 | |
| 192 | mode = be16_to_cpu(perms->mode); |
| 193 | |
| 194 | i_uid_write(inode, be32_to_cpu(perms->owner)); |
| 195 | if (!i_uid_read(inode) && !mode) |
| 196 | inode->i_uid = sbi->uid; |
| 197 | |
| 198 | i_gid_write(inode, be32_to_cpu(perms->group)); |
| 199 | if (!i_gid_read(inode) && !mode) |
| 200 | inode->i_gid = sbi->gid; |
| 201 | |
| 202 | if (dir) { |
| 203 | mode = mode ? (mode & S_IALLUGO) : (S_IRWXUGO & ~(sbi->umask)); |
| 204 | mode |= S_IFDIR; |
| 205 | } else if (!mode) |
| 206 | mode = S_IFREG | ((S_IRUGO|S_IWUGO) & ~(sbi->umask)); |
| 207 | inode->i_mode = mode; |
| 208 | |
| 209 | HFSPLUS_I(inode)->userflags = perms->userflags; |
| 210 | if (perms->rootflags & HFSPLUS_FLG_IMMUTABLE) |
| 211 | inode->i_flags |= S_IMMUTABLE; |
| 212 | else |
| 213 | inode->i_flags &= ~S_IMMUTABLE; |
| 214 | if (perms->rootflags & HFSPLUS_FLG_APPEND) |
| 215 | inode->i_flags |= S_APPEND; |
| 216 | else |
| 217 | inode->i_flags &= ~S_APPEND; |
| 218 | } |
| 219 | |
| 220 | static int hfsplus_file_open(struct inode *inode, struct file *file) |
| 221 | { |
| 222 | if (HFSPLUS_IS_RSRC(inode)) |
| 223 | inode = HFSPLUS_I(inode)->rsrc_inode; |
| 224 | if (!(file->f_flags & O_LARGEFILE) && i_size_read(inode) > MAX_NON_LFS) |
| 225 | return -EOVERFLOW; |
| 226 | atomic_inc(&HFSPLUS_I(inode)->opencnt); |
| 227 | return 0; |
| 228 | } |
| 229 | |
| 230 | static int hfsplus_file_release(struct inode *inode, struct file *file) |
| 231 | { |
| 232 | struct super_block *sb = inode->i_sb; |
| 233 | |
| 234 | if (HFSPLUS_IS_RSRC(inode)) |
| 235 | inode = HFSPLUS_I(inode)->rsrc_inode; |
| 236 | if (atomic_dec_and_test(&HFSPLUS_I(inode)->opencnt)) { |
| 237 | inode_lock(inode); |
| 238 | hfsplus_file_truncate(inode); |
| 239 | if (inode->i_flags & S_DEAD) { |
| 240 | hfsplus_delete_cat(inode->i_ino, |
| 241 | HFSPLUS_SB(sb)->hidden_dir, NULL); |
| 242 | hfsplus_delete_inode(inode); |
| 243 | } |
| 244 | inode_unlock(inode); |
| 245 | } |
| 246 | return 0; |
| 247 | } |
| 248 | |
| 249 | static int hfsplus_setattr(struct user_namespace *mnt_userns, |
| 250 | struct dentry *dentry, struct iattr *attr) |
| 251 | { |
| 252 | struct inode *inode = d_inode(dentry); |
| 253 | int error; |
| 254 | |
| 255 | error = setattr_prepare(&init_user_ns, dentry, attr); |
| 256 | if (error) |
| 257 | return error; |
| 258 | |
| 259 | if ((attr->ia_valid & ATTR_SIZE) && |
| 260 | attr->ia_size != i_size_read(inode)) { |
| 261 | inode_dio_wait(inode); |
| 262 | if (attr->ia_size > inode->i_size) { |
| 263 | error = generic_cont_expand_simple(inode, |
| 264 | attr->ia_size); |
| 265 | if (error) |
| 266 | return error; |
| 267 | } |
| 268 | truncate_setsize(inode, attr->ia_size); |
| 269 | hfsplus_file_truncate(inode); |
| 270 | inode->i_mtime = inode->i_ctime = current_time(inode); |
| 271 | } |
| 272 | |
| 273 | setattr_copy(&init_user_ns, inode, attr); |
| 274 | mark_inode_dirty(inode); |
| 275 | |
| 276 | return 0; |
| 277 | } |
| 278 | |
| 279 | int hfsplus_getattr(struct user_namespace *mnt_userns, const struct path *path, |
| 280 | struct kstat *stat, u32 request_mask, |
| 281 | unsigned int query_flags) |
| 282 | { |
| 283 | struct inode *inode = d_inode(path->dentry); |
| 284 | struct hfsplus_inode_info *hip = HFSPLUS_I(inode); |
| 285 | |
| 286 | if (request_mask & STATX_BTIME) { |
| 287 | stat->result_mask |= STATX_BTIME; |
| 288 | stat->btime = hfsp_mt2ut(hip->create_date); |
| 289 | } |
| 290 | |
| 291 | if (inode->i_flags & S_APPEND) |
| 292 | stat->attributes |= STATX_ATTR_APPEND; |
| 293 | if (inode->i_flags & S_IMMUTABLE) |
| 294 | stat->attributes |= STATX_ATTR_IMMUTABLE; |
| 295 | if (hip->userflags & HFSPLUS_FLG_NODUMP) |
| 296 | stat->attributes |= STATX_ATTR_NODUMP; |
| 297 | |
| 298 | stat->attributes_mask |= STATX_ATTR_APPEND | STATX_ATTR_IMMUTABLE | |
| 299 | STATX_ATTR_NODUMP; |
| 300 | |
| 301 | generic_fillattr(&init_user_ns, inode, stat); |
| 302 | return 0; |
| 303 | } |
| 304 | |
| 305 | int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end, |
| 306 | int datasync) |
| 307 | { |
| 308 | struct inode *inode = file->f_mapping->host; |
| 309 | struct hfsplus_inode_info *hip = HFSPLUS_I(inode); |
| 310 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb); |
| 311 | int error = 0, error2; |
| 312 | |
| 313 | error = file_write_and_wait_range(file, start, end); |
| 314 | if (error) |
| 315 | return error; |
| 316 | inode_lock(inode); |
| 317 | |
| 318 | /* |
| 319 | * Sync inode metadata into the catalog and extent trees. |
| 320 | */ |
| 321 | sync_inode_metadata(inode, 1); |
| 322 | |
| 323 | /* |
| 324 | * And explicitly write out the btrees. |
| 325 | */ |
| 326 | if (test_and_clear_bit(HFSPLUS_I_CAT_DIRTY, &hip->flags)) |
| 327 | error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping); |
| 328 | |
| 329 | if (test_and_clear_bit(HFSPLUS_I_EXT_DIRTY, &hip->flags)) { |
| 330 | error2 = |
| 331 | filemap_write_and_wait(sbi->ext_tree->inode->i_mapping); |
| 332 | if (!error) |
| 333 | error = error2; |
| 334 | } |
| 335 | |
| 336 | if (test_and_clear_bit(HFSPLUS_I_ATTR_DIRTY, &hip->flags)) { |
| 337 | if (sbi->attr_tree) { |
| 338 | error2 = |
| 339 | filemap_write_and_wait( |
| 340 | sbi->attr_tree->inode->i_mapping); |
| 341 | if (!error) |
| 342 | error = error2; |
| 343 | } else { |
| 344 | pr_err("sync non-existent attributes tree\n"); |
| 345 | } |
| 346 | } |
| 347 | |
| 348 | if (test_and_clear_bit(HFSPLUS_I_ALLOC_DIRTY, &hip->flags)) { |
| 349 | error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping); |
| 350 | if (!error) |
| 351 | error = error2; |
| 352 | } |
| 353 | |
| 354 | if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags)) |
| 355 | blkdev_issue_flush(inode->i_sb->s_bdev); |
| 356 | |
| 357 | inode_unlock(inode); |
| 358 | |
| 359 | return error; |
| 360 | } |
| 361 | |
| 362 | static const struct inode_operations hfsplus_file_inode_operations = { |
| 363 | .setattr = hfsplus_setattr, |
| 364 | .getattr = hfsplus_getattr, |
| 365 | .listxattr = hfsplus_listxattr, |
| 366 | .fileattr_get = hfsplus_fileattr_get, |
| 367 | .fileattr_set = hfsplus_fileattr_set, |
| 368 | }; |
| 369 | |
| 370 | static const struct file_operations hfsplus_file_operations = { |
| 371 | .llseek = generic_file_llseek, |
| 372 | .read_iter = generic_file_read_iter, |
| 373 | .write_iter = generic_file_write_iter, |
| 374 | .mmap = generic_file_mmap, |
| 375 | .splice_read = generic_file_splice_read, |
| 376 | .fsync = hfsplus_file_fsync, |
| 377 | .open = hfsplus_file_open, |
| 378 | .release = hfsplus_file_release, |
| 379 | .unlocked_ioctl = hfsplus_ioctl, |
| 380 | }; |
| 381 | |
| 382 | struct inode *hfsplus_new_inode(struct super_block *sb, struct inode *dir, |
| 383 | umode_t mode) |
| 384 | { |
| 385 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); |
| 386 | struct inode *inode = new_inode(sb); |
| 387 | struct hfsplus_inode_info *hip; |
| 388 | |
| 389 | if (!inode) |
| 390 | return NULL; |
| 391 | |
| 392 | inode->i_ino = sbi->next_cnid++; |
| 393 | inode_init_owner(&init_user_ns, inode, dir, mode); |
| 394 | set_nlink(inode, 1); |
| 395 | inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode); |
| 396 | |
| 397 | hip = HFSPLUS_I(inode); |
| 398 | INIT_LIST_HEAD(&hip->open_dir_list); |
| 399 | spin_lock_init(&hip->open_dir_lock); |
| 400 | mutex_init(&hip->extents_lock); |
| 401 | atomic_set(&hip->opencnt, 0); |
| 402 | hip->extent_state = 0; |
| 403 | hip->flags = 0; |
| 404 | hip->userflags = 0; |
| 405 | hip->subfolders = 0; |
| 406 | memset(hip->first_extents, 0, sizeof(hfsplus_extent_rec)); |
| 407 | memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec)); |
| 408 | hip->alloc_blocks = 0; |
| 409 | hip->first_blocks = 0; |
| 410 | hip->cached_start = 0; |
| 411 | hip->cached_blocks = 0; |
| 412 | hip->phys_size = 0; |
| 413 | hip->fs_blocks = 0; |
| 414 | hip->rsrc_inode = NULL; |
| 415 | if (S_ISDIR(inode->i_mode)) { |
| 416 | inode->i_size = 2; |
| 417 | sbi->folder_count++; |
| 418 | inode->i_op = &hfsplus_dir_inode_operations; |
| 419 | inode->i_fop = &hfsplus_dir_operations; |
| 420 | } else if (S_ISREG(inode->i_mode)) { |
| 421 | sbi->file_count++; |
| 422 | inode->i_op = &hfsplus_file_inode_operations; |
| 423 | inode->i_fop = &hfsplus_file_operations; |
| 424 | inode->i_mapping->a_ops = &hfsplus_aops; |
| 425 | hip->clump_blocks = sbi->data_clump_blocks; |
| 426 | } else if (S_ISLNK(inode->i_mode)) { |
| 427 | sbi->file_count++; |
| 428 | inode->i_op = &page_symlink_inode_operations; |
| 429 | inode_nohighmem(inode); |
| 430 | inode->i_mapping->a_ops = &hfsplus_aops; |
| 431 | hip->clump_blocks = 1; |
| 432 | } else |
| 433 | sbi->file_count++; |
| 434 | insert_inode_hash(inode); |
| 435 | mark_inode_dirty(inode); |
| 436 | hfsplus_mark_mdb_dirty(sb); |
| 437 | |
| 438 | return inode; |
| 439 | } |
| 440 | |
| 441 | void hfsplus_delete_inode(struct inode *inode) |
| 442 | { |
| 443 | struct super_block *sb = inode->i_sb; |
| 444 | |
| 445 | if (S_ISDIR(inode->i_mode)) { |
| 446 | HFSPLUS_SB(sb)->folder_count--; |
| 447 | hfsplus_mark_mdb_dirty(sb); |
| 448 | return; |
| 449 | } |
| 450 | HFSPLUS_SB(sb)->file_count--; |
| 451 | if (S_ISREG(inode->i_mode)) { |
| 452 | if (!inode->i_nlink) { |
| 453 | inode->i_size = 0; |
| 454 | hfsplus_file_truncate(inode); |
| 455 | } |
| 456 | } else if (S_ISLNK(inode->i_mode)) { |
| 457 | inode->i_size = 0; |
| 458 | hfsplus_file_truncate(inode); |
| 459 | } |
| 460 | hfsplus_mark_mdb_dirty(sb); |
| 461 | } |
| 462 | |
| 463 | void hfsplus_inode_read_fork(struct inode *inode, struct hfsplus_fork_raw *fork) |
| 464 | { |
| 465 | struct super_block *sb = inode->i_sb; |
| 466 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); |
| 467 | struct hfsplus_inode_info *hip = HFSPLUS_I(inode); |
| 468 | u32 count; |
| 469 | int i; |
| 470 | |
| 471 | memcpy(&hip->first_extents, &fork->extents, sizeof(hfsplus_extent_rec)); |
| 472 | for (count = 0, i = 0; i < 8; i++) |
| 473 | count += be32_to_cpu(fork->extents[i].block_count); |
| 474 | hip->first_blocks = count; |
| 475 | memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec)); |
| 476 | hip->cached_start = 0; |
| 477 | hip->cached_blocks = 0; |
| 478 | |
| 479 | hip->alloc_blocks = be32_to_cpu(fork->total_blocks); |
| 480 | hip->phys_size = inode->i_size = be64_to_cpu(fork->total_size); |
| 481 | hip->fs_blocks = |
| 482 | (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits; |
| 483 | inode_set_bytes(inode, hip->fs_blocks << sb->s_blocksize_bits); |
| 484 | hip->clump_blocks = |
| 485 | be32_to_cpu(fork->clump_size) >> sbi->alloc_blksz_shift; |
| 486 | if (!hip->clump_blocks) { |
| 487 | hip->clump_blocks = HFSPLUS_IS_RSRC(inode) ? |
| 488 | sbi->rsrc_clump_blocks : |
| 489 | sbi->data_clump_blocks; |
| 490 | } |
| 491 | } |
| 492 | |
| 493 | void hfsplus_inode_write_fork(struct inode *inode, |
| 494 | struct hfsplus_fork_raw *fork) |
| 495 | { |
| 496 | memcpy(&fork->extents, &HFSPLUS_I(inode)->first_extents, |
| 497 | sizeof(hfsplus_extent_rec)); |
| 498 | fork->total_size = cpu_to_be64(inode->i_size); |
| 499 | fork->total_blocks = cpu_to_be32(HFSPLUS_I(inode)->alloc_blocks); |
| 500 | } |
| 501 | |
| 502 | int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd) |
| 503 | { |
| 504 | hfsplus_cat_entry entry; |
| 505 | int res = 0; |
| 506 | u16 type; |
| 507 | |
| 508 | type = hfs_bnode_read_u16(fd->bnode, fd->entryoffset); |
| 509 | |
| 510 | HFSPLUS_I(inode)->linkid = 0; |
| 511 | if (type == HFSPLUS_FOLDER) { |
| 512 | struct hfsplus_cat_folder *folder = &entry.folder; |
| 513 | |
| 514 | WARN_ON(fd->entrylength < sizeof(struct hfsplus_cat_folder)); |
| 515 | hfs_bnode_read(fd->bnode, &entry, fd->entryoffset, |
| 516 | sizeof(struct hfsplus_cat_folder)); |
| 517 | hfsplus_get_perms(inode, &folder->permissions, 1); |
| 518 | set_nlink(inode, 1); |
| 519 | inode->i_size = 2 + be32_to_cpu(folder->valence); |
| 520 | inode->i_atime = hfsp_mt2ut(folder->access_date); |
| 521 | inode->i_mtime = hfsp_mt2ut(folder->content_mod_date); |
| 522 | inode->i_ctime = hfsp_mt2ut(folder->attribute_mod_date); |
| 523 | HFSPLUS_I(inode)->create_date = folder->create_date; |
| 524 | HFSPLUS_I(inode)->fs_blocks = 0; |
| 525 | if (folder->flags & cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT)) { |
| 526 | HFSPLUS_I(inode)->subfolders = |
| 527 | be32_to_cpu(folder->subfolders); |
| 528 | } |
| 529 | inode->i_op = &hfsplus_dir_inode_operations; |
| 530 | inode->i_fop = &hfsplus_dir_operations; |
| 531 | } else if (type == HFSPLUS_FILE) { |
| 532 | struct hfsplus_cat_file *file = &entry.file; |
| 533 | |
| 534 | WARN_ON(fd->entrylength < sizeof(struct hfsplus_cat_file)); |
| 535 | hfs_bnode_read(fd->bnode, &entry, fd->entryoffset, |
| 536 | sizeof(struct hfsplus_cat_file)); |
| 537 | |
| 538 | hfsplus_inode_read_fork(inode, HFSPLUS_IS_RSRC(inode) ? |
| 539 | &file->rsrc_fork : &file->data_fork); |
| 540 | hfsplus_get_perms(inode, &file->permissions, 0); |
| 541 | set_nlink(inode, 1); |
| 542 | if (S_ISREG(inode->i_mode)) { |
| 543 | if (file->permissions.dev) |
| 544 | set_nlink(inode, |
| 545 | be32_to_cpu(file->permissions.dev)); |
| 546 | inode->i_op = &hfsplus_file_inode_operations; |
| 547 | inode->i_fop = &hfsplus_file_operations; |
| 548 | inode->i_mapping->a_ops = &hfsplus_aops; |
| 549 | } else if (S_ISLNK(inode->i_mode)) { |
| 550 | inode->i_op = &page_symlink_inode_operations; |
| 551 | inode_nohighmem(inode); |
| 552 | inode->i_mapping->a_ops = &hfsplus_aops; |
| 553 | } else { |
| 554 | init_special_inode(inode, inode->i_mode, |
| 555 | be32_to_cpu(file->permissions.dev)); |
| 556 | } |
| 557 | inode->i_atime = hfsp_mt2ut(file->access_date); |
| 558 | inode->i_mtime = hfsp_mt2ut(file->content_mod_date); |
| 559 | inode->i_ctime = hfsp_mt2ut(file->attribute_mod_date); |
| 560 | HFSPLUS_I(inode)->create_date = file->create_date; |
| 561 | } else { |
| 562 | pr_err("bad catalog entry used to create inode\n"); |
| 563 | res = -EIO; |
| 564 | } |
| 565 | return res; |
| 566 | } |
| 567 | |
| 568 | int hfsplus_cat_write_inode(struct inode *inode) |
| 569 | { |
| 570 | struct inode *main_inode = inode; |
| 571 | struct hfs_find_data fd; |
| 572 | hfsplus_cat_entry entry; |
| 573 | |
| 574 | if (HFSPLUS_IS_RSRC(inode)) |
| 575 | main_inode = HFSPLUS_I(inode)->rsrc_inode; |
| 576 | |
| 577 | if (!main_inode->i_nlink) |
| 578 | return 0; |
| 579 | |
| 580 | if (hfs_find_init(HFSPLUS_SB(main_inode->i_sb)->cat_tree, &fd)) |
| 581 | /* panic? */ |
| 582 | return -EIO; |
| 583 | |
| 584 | if (hfsplus_find_cat(main_inode->i_sb, main_inode->i_ino, &fd)) |
| 585 | /* panic? */ |
| 586 | goto out; |
| 587 | |
| 588 | if (S_ISDIR(main_inode->i_mode)) { |
| 589 | struct hfsplus_cat_folder *folder = &entry.folder; |
| 590 | |
| 591 | WARN_ON(fd.entrylength < sizeof(struct hfsplus_cat_folder)); |
| 592 | hfs_bnode_read(fd.bnode, &entry, fd.entryoffset, |
| 593 | sizeof(struct hfsplus_cat_folder)); |
| 594 | /* simple node checks? */ |
| 595 | hfsplus_cat_set_perms(inode, &folder->permissions); |
| 596 | folder->access_date = hfsp_ut2mt(inode->i_atime); |
| 597 | folder->content_mod_date = hfsp_ut2mt(inode->i_mtime); |
| 598 | folder->attribute_mod_date = hfsp_ut2mt(inode->i_ctime); |
| 599 | folder->valence = cpu_to_be32(inode->i_size - 2); |
| 600 | if (folder->flags & cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT)) { |
| 601 | folder->subfolders = |
| 602 | cpu_to_be32(HFSPLUS_I(inode)->subfolders); |
| 603 | } |
| 604 | hfs_bnode_write(fd.bnode, &entry, fd.entryoffset, |
| 605 | sizeof(struct hfsplus_cat_folder)); |
| 606 | } else if (HFSPLUS_IS_RSRC(inode)) { |
| 607 | struct hfsplus_cat_file *file = &entry.file; |
| 608 | hfs_bnode_read(fd.bnode, &entry, fd.entryoffset, |
| 609 | sizeof(struct hfsplus_cat_file)); |
| 610 | hfsplus_inode_write_fork(inode, &file->rsrc_fork); |
| 611 | hfs_bnode_write(fd.bnode, &entry, fd.entryoffset, |
| 612 | sizeof(struct hfsplus_cat_file)); |
| 613 | } else { |
| 614 | struct hfsplus_cat_file *file = &entry.file; |
| 615 | |
| 616 | WARN_ON(fd.entrylength < sizeof(struct hfsplus_cat_file)); |
| 617 | hfs_bnode_read(fd.bnode, &entry, fd.entryoffset, |
| 618 | sizeof(struct hfsplus_cat_file)); |
| 619 | hfsplus_inode_write_fork(inode, &file->data_fork); |
| 620 | hfsplus_cat_set_perms(inode, &file->permissions); |
| 621 | if (HFSPLUS_FLG_IMMUTABLE & |
| 622 | (file->permissions.rootflags | |
| 623 | file->permissions.userflags)) |
| 624 | file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED); |
| 625 | else |
| 626 | file->flags &= cpu_to_be16(~HFSPLUS_FILE_LOCKED); |
| 627 | file->access_date = hfsp_ut2mt(inode->i_atime); |
| 628 | file->content_mod_date = hfsp_ut2mt(inode->i_mtime); |
| 629 | file->attribute_mod_date = hfsp_ut2mt(inode->i_ctime); |
| 630 | hfs_bnode_write(fd.bnode, &entry, fd.entryoffset, |
| 631 | sizeof(struct hfsplus_cat_file)); |
| 632 | } |
| 633 | |
| 634 | set_bit(HFSPLUS_I_CAT_DIRTY, &HFSPLUS_I(inode)->flags); |
| 635 | out: |
| 636 | hfs_find_exit(&fd); |
| 637 | return 0; |
| 638 | } |
| 639 | |
| 640 | int hfsplus_fileattr_get(struct dentry *dentry, struct fileattr *fa) |
| 641 | { |
| 642 | struct inode *inode = d_inode(dentry); |
| 643 | struct hfsplus_inode_info *hip = HFSPLUS_I(inode); |
| 644 | unsigned int flags = 0; |
| 645 | |
| 646 | if (inode->i_flags & S_IMMUTABLE) |
| 647 | flags |= FS_IMMUTABLE_FL; |
| 648 | if (inode->i_flags & S_APPEND) |
| 649 | flags |= FS_APPEND_FL; |
| 650 | if (hip->userflags & HFSPLUS_FLG_NODUMP) |
| 651 | flags |= FS_NODUMP_FL; |
| 652 | |
| 653 | fileattr_fill_flags(fa, flags); |
| 654 | |
| 655 | return 0; |
| 656 | } |
| 657 | |
| 658 | int hfsplus_fileattr_set(struct user_namespace *mnt_userns, |
| 659 | struct dentry *dentry, struct fileattr *fa) |
| 660 | { |
| 661 | struct inode *inode = d_inode(dentry); |
| 662 | struct hfsplus_inode_info *hip = HFSPLUS_I(inode); |
| 663 | unsigned int new_fl = 0; |
| 664 | |
| 665 | if (fileattr_has_fsx(fa)) |
| 666 | return -EOPNOTSUPP; |
| 667 | |
| 668 | /* don't silently ignore unsupported ext2 flags */ |
| 669 | if (fa->flags & ~(FS_IMMUTABLE_FL|FS_APPEND_FL|FS_NODUMP_FL)) |
| 670 | return -EOPNOTSUPP; |
| 671 | |
| 672 | if (fa->flags & FS_IMMUTABLE_FL) |
| 673 | new_fl |= S_IMMUTABLE; |
| 674 | |
| 675 | if (fa->flags & FS_APPEND_FL) |
| 676 | new_fl |= S_APPEND; |
| 677 | |
| 678 | inode_set_flags(inode, new_fl, S_IMMUTABLE | S_APPEND); |
| 679 | |
| 680 | if (fa->flags & FS_NODUMP_FL) |
| 681 | hip->userflags |= HFSPLUS_FLG_NODUMP; |
| 682 | else |
| 683 | hip->userflags &= ~HFSPLUS_FLG_NODUMP; |
| 684 | |
| 685 | inode->i_ctime = current_time(inode); |
| 686 | mark_inode_dirty(inode); |
| 687 | |
| 688 | return 0; |
| 689 | } |