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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
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 | ||
34a2d313 | 12 | #include <linux/blkdev.h> |
1da177e4 LT |
13 | #include <linux/mm.h> |
14 | #include <linux/fs.h> | |
15 | #include <linux/pagemap.h> | |
1da177e4 | 16 | #include <linux/mpage.h> |
e8edc6e0 | 17 | #include <linux/sched.h> |
5b825c3a | 18 | #include <linux/cred.h> |
e2e40f2c | 19 | #include <linux/uio.h> |
1da177e4 LT |
20 | |
21 | #include "hfsplus_fs.h" | |
22 | #include "hfsplus_raw.h" | |
324ef39a | 23 | #include "xattr.h" |
b4c1107c | 24 | #include "acl.h" |
1da177e4 LT |
25 | |
26 | static int hfsplus_readpage(struct file *file, struct page *page) | |
27 | { | |
1da177e4 LT |
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 | { | |
1da177e4 LT |
33 | return block_write_full_page(page, hfsplus_get_block, wbc); |
34 | } | |
35 | ||
d5068485 MS |
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) { | |
7caef267 | 41 | truncate_pagecache(inode, inode->i_size); |
d5068485 MS |
42 | hfsplus_file_truncate(inode); |
43 | } | |
44 | } | |
45 | ||
7c0efc62 NP |
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) | |
1da177e4 | 49 | { |
282dc178 CH |
50 | int ret; |
51 | ||
7c0efc62 | 52 | *pagep = NULL; |
282dc178 | 53 | ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata, |
7c0efc62 | 54 | hfsplus_get_block, |
6af502de | 55 | &HFSPLUS_I(mapping->host)->phys_size); |
d5068485 MS |
56 | if (unlikely(ret)) |
57 | hfsplus_write_failed(mapping, pos + len); | |
282dc178 CH |
58 | |
59 | return ret; | |
1da177e4 LT |
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 | ||
27496a8c | 67 | static int hfsplus_releasepage(struct page *page, gfp_t mask) |
1da177e4 LT |
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: | |
dd73a01a | 78 | tree = HFSPLUS_SB(sb)->ext_tree; |
1da177e4 LT |
79 | break; |
80 | case HFSPLUS_CAT_CNID: | |
dd73a01a | 81 | tree = HFSPLUS_SB(sb)->cat_tree; |
1da177e4 LT |
82 | break; |
83 | case HFSPLUS_ATTR_CNID: | |
dd73a01a | 84 | tree = HFSPLUS_SB(sb)->attr_tree; |
1da177e4 LT |
85 | break; |
86 | default: | |
87 | BUG(); | |
88 | return 0; | |
89 | } | |
70632249 ES |
90 | if (!tree) |
91 | return 0; | |
09cbfeaf | 92 | if (tree->node_size >= PAGE_SIZE) { |
2753cc28 | 93 | nidx = page->index >> |
09cbfeaf | 94 | (tree->node_size_shift - PAGE_SHIFT); |
1da177e4 LT |
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 { | |
2753cc28 | 107 | nidx = page->index << |
09cbfeaf KS |
108 | (PAGE_SHIFT - tree->node_size_shift); |
109 | i = 1 << (PAGE_SHIFT - tree->node_size_shift); | |
1da177e4 LT |
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 | } | |
1da177e4 LT |
124 | return res ? try_to_free_buffers(page) : 0; |
125 | } | |
126 | ||
c8b8e32d | 127 | static ssize_t hfsplus_direct_IO(struct kiocb *iocb, struct iov_iter *iter) |
1da177e4 LT |
128 | { |
129 | struct file *file = iocb->ki_filp; | |
d5068485 | 130 | struct address_space *mapping = file->f_mapping; |
93c76a3d | 131 | struct inode *inode = mapping->host; |
a6cbcd4a | 132 | size_t count = iov_iter_count(iter); |
eafdc7d1 | 133 | ssize_t ret; |
1da177e4 | 134 | |
c8b8e32d | 135 | ret = blockdev_direct_IO(iocb, inode, iter, hfsplus_get_block); |
eafdc7d1 CH |
136 | |
137 | /* | |
138 | * In case of error extending write may have instantiated a few | |
139 | * blocks outside i_size. Trim these off again. | |
140 | */ | |
6f673763 | 141 | if (unlikely(iov_iter_rw(iter) == WRITE && ret < 0)) { |
eafdc7d1 | 142 | loff_t isize = i_size_read(inode); |
c8b8e32d | 143 | loff_t end = iocb->ki_pos + count; |
eafdc7d1 CH |
144 | |
145 | if (end > isize) | |
d5068485 | 146 | hfsplus_write_failed(mapping, end); |
eafdc7d1 CH |
147 | } |
148 | ||
149 | return ret; | |
1da177e4 LT |
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 | ||
f5e54d6e | 158 | const struct address_space_operations hfsplus_btree_aops = { |
1da177e4 LT |
159 | .readpage = hfsplus_readpage, |
160 | .writepage = hfsplus_writepage, | |
7c0efc62 NP |
161 | .write_begin = hfsplus_write_begin, |
162 | .write_end = generic_write_end, | |
1da177e4 LT |
163 | .bmap = hfsplus_bmap, |
164 | .releasepage = hfsplus_releasepage, | |
165 | }; | |
166 | ||
f5e54d6e | 167 | const struct address_space_operations hfsplus_aops = { |
1da177e4 LT |
168 | .readpage = hfsplus_readpage, |
169 | .writepage = hfsplus_writepage, | |
7c0efc62 NP |
170 | .write_begin = hfsplus_write_begin, |
171 | .write_end = generic_write_end, | |
1da177e4 LT |
172 | .bmap = hfsplus_bmap, |
173 | .direct_IO = hfsplus_direct_IO, | |
174 | .writepages = hfsplus_writepages, | |
175 | }; | |
176 | ||
e16404ed | 177 | const struct dentry_operations hfsplus_dentry_operations = { |
d45bce8f DG |
178 | .d_hash = hfsplus_hash_dentry, |
179 | .d_compare = hfsplus_compare_dentry, | |
180 | }; | |
181 | ||
2753cc28 AS |
182 | static void hfsplus_get_perms(struct inode *inode, |
183 | struct hfsplus_perm *perms, int dir) | |
1da177e4 | 184 | { |
dd73a01a | 185 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb); |
1da177e4 LT |
186 | u16 mode; |
187 | ||
188 | mode = be16_to_cpu(perms->mode); | |
189 | ||
16525e3f EB |
190 | i_uid_write(inode, be32_to_cpu(perms->owner)); |
191 | if (!i_uid_read(inode) && !mode) | |
dd73a01a | 192 | inode->i_uid = sbi->uid; |
1da177e4 | 193 | |
16525e3f EB |
194 | i_gid_write(inode, be32_to_cpu(perms->group)); |
195 | if (!i_gid_read(inode) && !mode) | |
dd73a01a | 196 | inode->i_gid = sbi->gid; |
1da177e4 LT |
197 | |
198 | if (dir) { | |
dd73a01a | 199 | mode = mode ? (mode & S_IALLUGO) : (S_IRWXUGO & ~(sbi->umask)); |
1da177e4 LT |
200 | mode |= S_IFDIR; |
201 | } else if (!mode) | |
dd73a01a | 202 | mode = S_IFREG | ((S_IRUGO|S_IWUGO) & ~(sbi->umask)); |
1da177e4 LT |
203 | inode->i_mode = mode; |
204 | ||
6af502de | 205 | HFSPLUS_I(inode)->userflags = perms->userflags; |
1da177e4 LT |
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 | ||
1da177e4 LT |
216 | static int hfsplus_file_open(struct inode *inode, struct file *file) |
217 | { | |
218 | if (HFSPLUS_IS_RSRC(inode)) | |
6af502de | 219 | inode = HFSPLUS_I(inode)->rsrc_inode; |
6e715294 AC |
220 | if (!(file->f_flags & O_LARGEFILE) && i_size_read(inode) > MAX_NON_LFS) |
221 | return -EOVERFLOW; | |
6af502de | 222 | atomic_inc(&HFSPLUS_I(inode)->opencnt); |
1da177e4 LT |
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)) | |
6af502de CH |
231 | inode = HFSPLUS_I(inode)->rsrc_inode; |
232 | if (atomic_dec_and_test(&HFSPLUS_I(inode)->opencnt)) { | |
5955102c | 233 | inode_lock(inode); |
1da177e4 LT |
234 | hfsplus_file_truncate(inode); |
235 | if (inode->i_flags & S_DEAD) { | |
dd73a01a CH |
236 | hfsplus_delete_cat(inode->i_ino, |
237 | HFSPLUS_SB(sb)->hidden_dir, NULL); | |
1da177e4 LT |
238 | hfsplus_delete_inode(inode); |
239 | } | |
5955102c | 240 | inode_unlock(inode); |
1da177e4 LT |
241 | } |
242 | return 0; | |
243 | } | |
244 | ||
d39aae9e CH |
245 | static int hfsplus_setattr(struct dentry *dentry, struct iattr *attr) |
246 | { | |
2b0143b5 | 247 | struct inode *inode = d_inode(dentry); |
d39aae9e CH |
248 | int error; |
249 | ||
31051c85 | 250 | error = setattr_prepare(dentry, attr); |
d39aae9e CH |
251 | if (error) |
252 | return error; | |
1025774c CH |
253 | |
254 | if ((attr->ia_valid & ATTR_SIZE) && | |
255 | attr->ia_size != i_size_read(inode)) { | |
562c72aa | 256 | inode_dio_wait(inode); |
059a704c SA |
257 | if (attr->ia_size > inode->i_size) { |
258 | error = generic_cont_expand_simple(inode, | |
259 | attr->ia_size); | |
260 | if (error) | |
261 | return error; | |
262 | } | |
d5068485 MS |
263 | truncate_setsize(inode, attr->ia_size); |
264 | hfsplus_file_truncate(inode); | |
1025774c CH |
265 | } |
266 | ||
267 | setattr_copy(inode, attr); | |
268 | mark_inode_dirty(inode); | |
b4c1107c VD |
269 | |
270 | if (attr->ia_valid & ATTR_MODE) { | |
b0a7ab57 | 271 | error = posix_acl_chmod(inode, inode->i_mode); |
b4c1107c VD |
272 | if (unlikely(error)) |
273 | return error; | |
274 | } | |
275 | ||
1025774c | 276 | return 0; |
d39aae9e CH |
277 | } |
278 | ||
02c24a82 JB |
279 | int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end, |
280 | int datasync) | |
b5fc510c | 281 | { |
28146976 | 282 | struct inode *inode = file->f_mapping->host; |
e3494705 | 283 | struct hfsplus_inode_info *hip = HFSPLUS_I(inode); |
28146976 | 284 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb); |
e3494705 | 285 | int error = 0, error2; |
b5fc510c | 286 | |
3b49c9a1 | 287 | error = file_write_and_wait_range(file, start, end); |
02c24a82 JB |
288 | if (error) |
289 | return error; | |
5955102c | 290 | inode_lock(inode); |
02c24a82 | 291 | |
28146976 CH |
292 | /* |
293 | * Sync inode metadata into the catalog and extent trees. | |
294 | */ | |
295 | sync_inode_metadata(inode, 1); | |
296 | ||
297 | /* | |
298 | * And explicitly write out the btrees. | |
299 | */ | |
e3494705 CH |
300 | if (test_and_clear_bit(HFSPLUS_I_CAT_DIRTY, &hip->flags)) |
301 | error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping); | |
302 | ||
303 | if (test_and_clear_bit(HFSPLUS_I_EXT_DIRTY, &hip->flags)) { | |
2753cc28 AS |
304 | error2 = |
305 | filemap_write_and_wait(sbi->ext_tree->inode->i_mapping); | |
e3494705 CH |
306 | if (!error) |
307 | error = error2; | |
308 | } | |
309 | ||
324ef39a VD |
310 | if (test_and_clear_bit(HFSPLUS_I_ATTR_DIRTY, &hip->flags)) { |
311 | if (sbi->attr_tree) { | |
312 | error2 = | |
313 | filemap_write_and_wait( | |
314 | sbi->attr_tree->inode->i_mapping); | |
315 | if (!error) | |
316 | error = error2; | |
317 | } else { | |
d6142673 | 318 | pr_err("sync non-existent attributes tree\n"); |
324ef39a VD |
319 | } |
320 | } | |
321 | ||
e3494705 CH |
322 | if (test_and_clear_bit(HFSPLUS_I_ALLOC_DIRTY, &hip->flags)) { |
323 | error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping); | |
324 | if (!error) | |
325 | error = error2; | |
326 | } | |
327 | ||
34a2d313 CH |
328 | if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags)) |
329 | blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL); | |
330 | ||
5955102c | 331 | inode_unlock(inode); |
02c24a82 | 332 | |
28146976 | 333 | return error; |
b5fc510c AV |
334 | } |
335 | ||
92e1d5be | 336 | static const struct inode_operations hfsplus_file_inode_operations = { |
d39aae9e | 337 | .setattr = hfsplus_setattr, |
1da177e4 | 338 | .listxattr = hfsplus_listxattr, |
b4c1107c VD |
339 | #ifdef CONFIG_HFSPLUS_FS_POSIX_ACL |
340 | .get_acl = hfsplus_get_posix_acl, | |
b0a7ab57 | 341 | .set_acl = hfsplus_set_posix_acl, |
b4c1107c | 342 | #endif |
1da177e4 LT |
343 | }; |
344 | ||
4b6f5d20 | 345 | static const struct file_operations hfsplus_file_operations = { |
20b7643d | 346 | .llseek = generic_file_llseek, |
aad4f8bb | 347 | .read_iter = generic_file_read_iter, |
8174202b | 348 | .write_iter = generic_file_write_iter, |
1da177e4 | 349 | .mmap = generic_file_mmap, |
5ffc4ef4 | 350 | .splice_read = generic_file_splice_read, |
b5fc510c | 351 | .fsync = hfsplus_file_fsync, |
1da177e4 LT |
352 | .open = hfsplus_file_open, |
353 | .release = hfsplus_file_release, | |
7cc4bcc6 | 354 | .unlocked_ioctl = hfsplus_ioctl, |
1da177e4 LT |
355 | }; |
356 | ||
c47da798 | 357 | struct inode *hfsplus_new_inode(struct super_block *sb, umode_t mode) |
1da177e4 | 358 | { |
dd73a01a | 359 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); |
1da177e4 | 360 | struct inode *inode = new_inode(sb); |
6af502de | 361 | struct hfsplus_inode_info *hip; |
dd73a01a | 362 | |
1da177e4 LT |
363 | if (!inode) |
364 | return NULL; | |
365 | ||
dd73a01a | 366 | inode->i_ino = sbi->next_cnid++; |
1da177e4 | 367 | inode->i_mode = mode; |
4ac8489a DH |
368 | inode->i_uid = current_fsuid(); |
369 | inode->i_gid = current_fsgid(); | |
bfe86848 | 370 | set_nlink(inode, 1); |
02027d42 | 371 | inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode); |
6af502de CH |
372 | |
373 | hip = HFSPLUS_I(inode); | |
374 | INIT_LIST_HEAD(&hip->open_dir_list); | |
323ee8fc | 375 | spin_lock_init(&hip->open_dir_lock); |
6af502de CH |
376 | mutex_init(&hip->extents_lock); |
377 | atomic_set(&hip->opencnt, 0); | |
b33b7921 | 378 | hip->extent_state = 0; |
6af502de | 379 | hip->flags = 0; |
f3922382 | 380 | hip->userflags = 0; |
d7d673a5 | 381 | hip->subfolders = 0; |
6af502de CH |
382 | memset(hip->first_extents, 0, sizeof(hfsplus_extent_rec)); |
383 | memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec)); | |
384 | hip->alloc_blocks = 0; | |
385 | hip->first_blocks = 0; | |
386 | hip->cached_start = 0; | |
387 | hip->cached_blocks = 0; | |
388 | hip->phys_size = 0; | |
389 | hip->fs_blocks = 0; | |
390 | hip->rsrc_inode = NULL; | |
1da177e4 LT |
391 | if (S_ISDIR(inode->i_mode)) { |
392 | inode->i_size = 2; | |
dd73a01a | 393 | sbi->folder_count++; |
1da177e4 LT |
394 | inode->i_op = &hfsplus_dir_inode_operations; |
395 | inode->i_fop = &hfsplus_dir_operations; | |
396 | } else if (S_ISREG(inode->i_mode)) { | |
dd73a01a | 397 | sbi->file_count++; |
1da177e4 LT |
398 | inode->i_op = &hfsplus_file_inode_operations; |
399 | inode->i_fop = &hfsplus_file_operations; | |
400 | inode->i_mapping->a_ops = &hfsplus_aops; | |
6af502de | 401 | hip->clump_blocks = sbi->data_clump_blocks; |
1da177e4 | 402 | } else if (S_ISLNK(inode->i_mode)) { |
dd73a01a | 403 | sbi->file_count++; |
1da177e4 | 404 | inode->i_op = &page_symlink_inode_operations; |
21fc61c7 | 405 | inode_nohighmem(inode); |
1da177e4 | 406 | inode->i_mapping->a_ops = &hfsplus_aops; |
6af502de | 407 | hip->clump_blocks = 1; |
1da177e4 | 408 | } else |
dd73a01a | 409 | sbi->file_count++; |
1da177e4 LT |
410 | insert_inode_hash(inode); |
411 | mark_inode_dirty(inode); | |
9e6c5829 | 412 | hfsplus_mark_mdb_dirty(sb); |
1da177e4 LT |
413 | |
414 | return inode; | |
415 | } | |
416 | ||
417 | void hfsplus_delete_inode(struct inode *inode) | |
418 | { | |
419 | struct super_block *sb = inode->i_sb; | |
420 | ||
421 | if (S_ISDIR(inode->i_mode)) { | |
dd73a01a | 422 | HFSPLUS_SB(sb)->folder_count--; |
9e6c5829 | 423 | hfsplus_mark_mdb_dirty(sb); |
1da177e4 LT |
424 | return; |
425 | } | |
dd73a01a | 426 | HFSPLUS_SB(sb)->file_count--; |
1da177e4 LT |
427 | if (S_ISREG(inode->i_mode)) { |
428 | if (!inode->i_nlink) { | |
429 | inode->i_size = 0; | |
430 | hfsplus_file_truncate(inode); | |
431 | } | |
432 | } else if (S_ISLNK(inode->i_mode)) { | |
433 | inode->i_size = 0; | |
434 | hfsplus_file_truncate(inode); | |
435 | } | |
9e6c5829 | 436 | hfsplus_mark_mdb_dirty(sb); |
1da177e4 LT |
437 | } |
438 | ||
439 | void hfsplus_inode_read_fork(struct inode *inode, struct hfsplus_fork_raw *fork) | |
440 | { | |
441 | struct super_block *sb = inode->i_sb; | |
dd73a01a | 442 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); |
6af502de | 443 | struct hfsplus_inode_info *hip = HFSPLUS_I(inode); |
1da177e4 LT |
444 | u32 count; |
445 | int i; | |
446 | ||
6af502de | 447 | memcpy(&hip->first_extents, &fork->extents, sizeof(hfsplus_extent_rec)); |
1da177e4 LT |
448 | for (count = 0, i = 0; i < 8; i++) |
449 | count += be32_to_cpu(fork->extents[i].block_count); | |
6af502de CH |
450 | hip->first_blocks = count; |
451 | memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec)); | |
452 | hip->cached_start = 0; | |
453 | hip->cached_blocks = 0; | |
454 | ||
455 | hip->alloc_blocks = be32_to_cpu(fork->total_blocks); | |
456 | hip->phys_size = inode->i_size = be64_to_cpu(fork->total_size); | |
457 | hip->fs_blocks = | |
458 | (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits; | |
459 | inode_set_bytes(inode, hip->fs_blocks << sb->s_blocksize_bits); | |
460 | hip->clump_blocks = | |
dd73a01a | 461 | be32_to_cpu(fork->clump_size) >> sbi->alloc_blksz_shift; |
6af502de CH |
462 | if (!hip->clump_blocks) { |
463 | hip->clump_blocks = HFSPLUS_IS_RSRC(inode) ? | |
dd73a01a CH |
464 | sbi->rsrc_clump_blocks : |
465 | sbi->data_clump_blocks; | |
466 | } | |
1da177e4 LT |
467 | } |
468 | ||
2753cc28 AS |
469 | void hfsplus_inode_write_fork(struct inode *inode, |
470 | struct hfsplus_fork_raw *fork) | |
1da177e4 | 471 | { |
6af502de | 472 | memcpy(&fork->extents, &HFSPLUS_I(inode)->first_extents, |
1da177e4 LT |
473 | sizeof(hfsplus_extent_rec)); |
474 | fork->total_size = cpu_to_be64(inode->i_size); | |
6af502de | 475 | fork->total_blocks = cpu_to_be32(HFSPLUS_I(inode)->alloc_blocks); |
1da177e4 LT |
476 | } |
477 | ||
478 | int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd) | |
479 | { | |
480 | hfsplus_cat_entry entry; | |
481 | int res = 0; | |
482 | u16 type; | |
483 | ||
484 | type = hfs_bnode_read_u16(fd->bnode, fd->entryoffset); | |
485 | ||
f6089ff8 | 486 | HFSPLUS_I(inode)->linkid = 0; |
1da177e4 LT |
487 | if (type == HFSPLUS_FOLDER) { |
488 | struct hfsplus_cat_folder *folder = &entry.folder; | |
489 | ||
490 | if (fd->entrylength < sizeof(struct hfsplus_cat_folder)) | |
491 | /* panic? */; | |
492 | hfs_bnode_read(fd->bnode, &entry, fd->entryoffset, | |
493 | sizeof(struct hfsplus_cat_folder)); | |
494 | hfsplus_get_perms(inode, &folder->permissions, 1); | |
bfe86848 | 495 | set_nlink(inode, 1); |
1da177e4 LT |
496 | inode->i_size = 2 + be32_to_cpu(folder->valence); |
497 | inode->i_atime = hfsp_mt2ut(folder->access_date); | |
498 | inode->i_mtime = hfsp_mt2ut(folder->content_mod_date); | |
9a4cad95 | 499 | inode->i_ctime = hfsp_mt2ut(folder->attribute_mod_date); |
6af502de CH |
500 | HFSPLUS_I(inode)->create_date = folder->create_date; |
501 | HFSPLUS_I(inode)->fs_blocks = 0; | |
d7d673a5 SA |
502 | if (folder->flags & cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT)) { |
503 | HFSPLUS_I(inode)->subfolders = | |
504 | be32_to_cpu(folder->subfolders); | |
505 | } | |
1da177e4 LT |
506 | inode->i_op = &hfsplus_dir_inode_operations; |
507 | inode->i_fop = &hfsplus_dir_operations; | |
508 | } else if (type == HFSPLUS_FILE) { | |
509 | struct hfsplus_cat_file *file = &entry.file; | |
510 | ||
511 | if (fd->entrylength < sizeof(struct hfsplus_cat_file)) | |
512 | /* panic? */; | |
513 | hfs_bnode_read(fd->bnode, &entry, fd->entryoffset, | |
514 | sizeof(struct hfsplus_cat_file)); | |
515 | ||
b33b7921 CH |
516 | hfsplus_inode_read_fork(inode, HFSPLUS_IS_RSRC(inode) ? |
517 | &file->rsrc_fork : &file->data_fork); | |
1da177e4 | 518 | hfsplus_get_perms(inode, &file->permissions, 0); |
bfe86848 | 519 | set_nlink(inode, 1); |
1da177e4 LT |
520 | if (S_ISREG(inode->i_mode)) { |
521 | if (file->permissions.dev) | |
bfe86848 MS |
522 | set_nlink(inode, |
523 | be32_to_cpu(file->permissions.dev)); | |
1da177e4 LT |
524 | inode->i_op = &hfsplus_file_inode_operations; |
525 | inode->i_fop = &hfsplus_file_operations; | |
526 | inode->i_mapping->a_ops = &hfsplus_aops; | |
527 | } else if (S_ISLNK(inode->i_mode)) { | |
528 | inode->i_op = &page_symlink_inode_operations; | |
21fc61c7 | 529 | inode_nohighmem(inode); |
1da177e4 LT |
530 | inode->i_mapping->a_ops = &hfsplus_aops; |
531 | } else { | |
532 | init_special_inode(inode, inode->i_mode, | |
533 | be32_to_cpu(file->permissions.dev)); | |
534 | } | |
535 | inode->i_atime = hfsp_mt2ut(file->access_date); | |
536 | inode->i_mtime = hfsp_mt2ut(file->content_mod_date); | |
9a4cad95 | 537 | inode->i_ctime = hfsp_mt2ut(file->attribute_mod_date); |
6af502de | 538 | HFSPLUS_I(inode)->create_date = file->create_date; |
1da177e4 | 539 | } else { |
d6142673 | 540 | pr_err("bad catalog entry used to create inode\n"); |
1da177e4 LT |
541 | res = -EIO; |
542 | } | |
543 | return res; | |
544 | } | |
545 | ||
546 | int hfsplus_cat_write_inode(struct inode *inode) | |
547 | { | |
548 | struct inode *main_inode = inode; | |
549 | struct hfs_find_data fd; | |
550 | hfsplus_cat_entry entry; | |
551 | ||
552 | if (HFSPLUS_IS_RSRC(inode)) | |
6af502de | 553 | main_inode = HFSPLUS_I(inode)->rsrc_inode; |
1da177e4 LT |
554 | |
555 | if (!main_inode->i_nlink) | |
556 | return 0; | |
557 | ||
dd73a01a | 558 | if (hfs_find_init(HFSPLUS_SB(main_inode->i_sb)->cat_tree, &fd)) |
1da177e4 LT |
559 | /* panic? */ |
560 | return -EIO; | |
561 | ||
562 | if (hfsplus_find_cat(main_inode->i_sb, main_inode->i_ino, &fd)) | |
563 | /* panic? */ | |
564 | goto out; | |
565 | ||
566 | if (S_ISDIR(main_inode->i_mode)) { | |
567 | struct hfsplus_cat_folder *folder = &entry.folder; | |
568 | ||
569 | if (fd.entrylength < sizeof(struct hfsplus_cat_folder)) | |
570 | /* panic? */; | |
571 | hfs_bnode_read(fd.bnode, &entry, fd.entryoffset, | |
572 | sizeof(struct hfsplus_cat_folder)); | |
573 | /* simple node checks? */ | |
90e61690 | 574 | hfsplus_cat_set_perms(inode, &folder->permissions); |
1da177e4 LT |
575 | folder->access_date = hfsp_ut2mt(inode->i_atime); |
576 | folder->content_mod_date = hfsp_ut2mt(inode->i_mtime); | |
577 | folder->attribute_mod_date = hfsp_ut2mt(inode->i_ctime); | |
578 | folder->valence = cpu_to_be32(inode->i_size - 2); | |
d7d673a5 SA |
579 | if (folder->flags & cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT)) { |
580 | folder->subfolders = | |
581 | cpu_to_be32(HFSPLUS_I(inode)->subfolders); | |
582 | } | |
1da177e4 LT |
583 | hfs_bnode_write(fd.bnode, &entry, fd.entryoffset, |
584 | sizeof(struct hfsplus_cat_folder)); | |
585 | } else if (HFSPLUS_IS_RSRC(inode)) { | |
586 | struct hfsplus_cat_file *file = &entry.file; | |
587 | hfs_bnode_read(fd.bnode, &entry, fd.entryoffset, | |
588 | sizeof(struct hfsplus_cat_file)); | |
589 | hfsplus_inode_write_fork(inode, &file->rsrc_fork); | |
590 | hfs_bnode_write(fd.bnode, &entry, fd.entryoffset, | |
591 | sizeof(struct hfsplus_cat_file)); | |
592 | } else { | |
593 | struct hfsplus_cat_file *file = &entry.file; | |
594 | ||
595 | if (fd.entrylength < sizeof(struct hfsplus_cat_file)) | |
596 | /* panic? */; | |
597 | hfs_bnode_read(fd.bnode, &entry, fd.entryoffset, | |
598 | sizeof(struct hfsplus_cat_file)); | |
599 | hfsplus_inode_write_fork(inode, &file->data_fork); | |
90e61690 | 600 | hfsplus_cat_set_perms(inode, &file->permissions); |
2753cc28 AS |
601 | if (HFSPLUS_FLG_IMMUTABLE & |
602 | (file->permissions.rootflags | | |
603 | file->permissions.userflags)) | |
1da177e4 LT |
604 | file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED); |
605 | else | |
606 | file->flags &= cpu_to_be16(~HFSPLUS_FILE_LOCKED); | |
607 | file->access_date = hfsp_ut2mt(inode->i_atime); | |
608 | file->content_mod_date = hfsp_ut2mt(inode->i_mtime); | |
609 | file->attribute_mod_date = hfsp_ut2mt(inode->i_ctime); | |
610 | hfs_bnode_write(fd.bnode, &entry, fd.entryoffset, | |
611 | sizeof(struct hfsplus_cat_file)); | |
612 | } | |
e3494705 CH |
613 | |
614 | set_bit(HFSPLUS_I_CAT_DIRTY, &HFSPLUS_I(inode)->flags); | |
1da177e4 LT |
615 | out: |
616 | hfs_find_exit(&fd); | |
617 | return 0; | |
618 | } |