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perf bpf: Move perf_event_output() from stdio.h to bpf.h
[linux/fpc-iii.git] / fs / hfsplus / inode.c
blobd7ab9d8c4b674380f6aa9470910e860dd61cc87a
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
21 #include "hfsplus_fs.h"
22 #include "hfsplus_raw.h"
23 #include "xattr.h"
24
25 static int hfsplus_readpage(struct file *file, struct page *page)
26 {
27 return block_read_full_page(page, hfsplus_get_block);
28 }
29
30 static int hfsplus_writepage(struct page *page, struct writeback_control *wbc)
31 {
32 return block_write_full_page(page, hfsplus_get_block, wbc);
33 }
34
35 static void hfsplus_write_failed(struct address_space *mapping, loff_t to)
36 {
37 struct inode *inode = mapping->host;
38
39 if (to > inode->i_size) {
40 truncate_pagecache(inode, inode->i_size);
41 hfsplus_file_truncate(inode);
42 }
43 }
44
45 static int hfsplus_write_begin(struct file *file, struct address_space *mapping,
46 loff_t pos, unsigned len, unsigned flags,
47 struct page **pagep, void **fsdata)
48 {
49 int ret;
50
51 *pagep = NULL;
52 ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
53 hfsplus_get_block,
54 &HFSPLUS_I(mapping->host)->phys_size);
55 if (unlikely(ret))
56 hfsplus_write_failed(mapping, pos + len);
57
58 return ret;
59 }
60
61 static sector_t hfsplus_bmap(struct address_space *mapping, sector_t block)
62 {
63 return generic_block_bmap(mapping, block, hfsplus_get_block);
64 }
65
66 static int hfsplus_releasepage(struct page *page, gfp_t mask)
67 {
68 struct inode *inode = page->mapping->host;
69 struct super_block *sb = inode->i_sb;
70 struct hfs_btree *tree;
71 struct hfs_bnode *node;
72 u32 nidx;
73 int i, res = 1;
74
75 switch (inode->i_ino) {
76 case HFSPLUS_EXT_CNID:
77 tree = HFSPLUS_SB(sb)->ext_tree;
78 break;
79 case HFSPLUS_CAT_CNID:
80 tree = HFSPLUS_SB(sb)->cat_tree;
81 break;
82 case HFSPLUS_ATTR_CNID:
83 tree = HFSPLUS_SB(sb)->attr_tree;
84 break;
85 default:
86 BUG();
87 return 0;
88 }
89 if (!tree)
90 return 0;
91 if (tree->node_size >= PAGE_SIZE) {
92 nidx = page->index >>
93 (tree->node_size_shift - PAGE_SHIFT);
94 spin_lock(&tree->hash_lock);
95 node = hfs_bnode_findhash(tree, nidx);
96 if (!node)
97 ;
98 else if (atomic_read(&node->refcnt))
99 res = 0;
100 if (res && node) {
101 hfs_bnode_unhash(node);
102 hfs_bnode_free(node);
103 }
104 spin_unlock(&tree->hash_lock);
105 } else {
106 nidx = page->index <<
107 (PAGE_SHIFT - tree->node_size_shift);
108 i = 1 << (PAGE_SHIFT - tree->node_size_shift);
109 spin_lock(&tree->hash_lock);
110 do {
111 node = hfs_bnode_findhash(tree, nidx++);
112 if (!node)
113 continue;
114 if (atomic_read(&node->refcnt)) {
115 res = 0;
116 break;
117 }
118 hfs_bnode_unhash(node);
119 hfs_bnode_free(node);
120 } while (--i && nidx < tree->node_count);
121 spin_unlock(&tree->hash_lock);
122 }
123 return res ? try_to_free_buffers(page) : 0;
124 }
125
126 static ssize_t hfsplus_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
127 {
128 struct file *file = iocb->ki_filp;
129 struct address_space *mapping = file->f_mapping;
130 struct inode *inode = mapping->host;
131 size_t count = iov_iter_count(iter);
132 ssize_t ret;
133
134 ret = blockdev_direct_IO(iocb, inode, iter, hfsplus_get_block);
135
136 /*
137 * In case of error extending write may have instantiated a few
138 * blocks outside i_size. Trim these off again.
139 */
140 if (unlikely(iov_iter_rw(iter) == WRITE && ret < 0)) {
141 loff_t isize = i_size_read(inode);
142 loff_t end = iocb->ki_pos + count;
143
144 if (end > isize)
145 hfsplus_write_failed(mapping, end);
146 }
147
148 return ret;
149 }
150
151 static int hfsplus_writepages(struct address_space *mapping,
152 struct writeback_control *wbc)
153 {
154 return mpage_writepages(mapping, wbc, hfsplus_get_block);
155 }
156
157 const struct address_space_operations hfsplus_btree_aops = {
158 .readpage = hfsplus_readpage,
159 .writepage = hfsplus_writepage,
160 .write_begin = hfsplus_write_begin,
161 .write_end = generic_write_end,
162 .bmap = hfsplus_bmap,
163 .releasepage = hfsplus_releasepage,
164 };
165
166 const struct address_space_operations hfsplus_aops = {
167 .readpage = hfsplus_readpage,
168 .writepage = hfsplus_writepage,
169 .write_begin = hfsplus_write_begin,
170 .write_end = generic_write_end,
171 .bmap = hfsplus_bmap,
172 .direct_IO = hfsplus_direct_IO,
173 .writepages = hfsplus_writepages,
174 };
175
176 const struct dentry_operations hfsplus_dentry_operations = {
177 .d_hash = hfsplus_hash_dentry,
178 .d_compare = hfsplus_compare_dentry,
179 };
180
181 static void hfsplus_get_perms(struct inode *inode,
182 struct hfsplus_perm *perms, int dir)
183 {
184 struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
185 u16 mode;
186
187 mode = be16_to_cpu(perms->mode);
188
189 i_uid_write(inode, be32_to_cpu(perms->owner));
190 if (!i_uid_read(inode) && !mode)
191 inode->i_uid = sbi->uid;
192
193 i_gid_write(inode, be32_to_cpu(perms->group));
194 if (!i_gid_read(inode) && !mode)
195 inode->i_gid = sbi->gid;
196
197 if (dir) {
198 mode = mode ? (mode & S_IALLUGO) : (S_IRWXUGO & ~(sbi->umask));
199 mode |= S_IFDIR;
200 } else if (!mode)
201 mode = S_IFREG | ((S_IRUGO|S_IWUGO) & ~(sbi->umask));
202 inode->i_mode = mode;
203
204 HFSPLUS_I(inode)->userflags = perms->userflags;
205 if (perms->rootflags & HFSPLUS_FLG_IMMUTABLE)
206 inode->i_flags |= S_IMMUTABLE;
207 else
208 inode->i_flags &= ~S_IMMUTABLE;
209 if (perms->rootflags & HFSPLUS_FLG_APPEND)
210 inode->i_flags |= S_APPEND;
211 else
212 inode->i_flags &= ~S_APPEND;
213 }
214
215 static int hfsplus_file_open(struct inode *inode, struct file *file)
216 {
217 if (HFSPLUS_IS_RSRC(inode))
218 inode = HFSPLUS_I(inode)->rsrc_inode;
219 if (!(file->f_flags & O_LARGEFILE) && i_size_read(inode) > MAX_NON_LFS)
220 return -EOVERFLOW;
221 atomic_inc(&HFSPLUS_I(inode)->opencnt);
222 return 0;
223 }
224
225 static int hfsplus_file_release(struct inode *inode, struct file *file)
226 {
227 struct super_block *sb = inode->i_sb;
228
229 if (HFSPLUS_IS_RSRC(inode))
230 inode = HFSPLUS_I(inode)->rsrc_inode;
231 if (atomic_dec_and_test(&HFSPLUS_I(inode)->opencnt)) {
232 inode_lock(inode);
233 hfsplus_file_truncate(inode);
234 if (inode->i_flags & S_DEAD) {
235 hfsplus_delete_cat(inode->i_ino,
236 HFSPLUS_SB(sb)->hidden_dir, NULL);
237 hfsplus_delete_inode(inode);
238 }
239 inode_unlock(inode);
240 }
241 return 0;
242 }
243
244 static int hfsplus_setattr(struct dentry *dentry, struct iattr *attr)
245 {
246 struct inode *inode = d_inode(dentry);
247 int error;
248
249 error = setattr_prepare(dentry, attr);
250 if (error)
251 return error;
252
253 if ((attr->ia_valid & ATTR_SIZE) &&
254 attr->ia_size != i_size_read(inode)) {
255 inode_dio_wait(inode);
256 if (attr->ia_size > inode->i_size) {
257 error = generic_cont_expand_simple(inode,
258 attr->ia_size);
259 if (error)
260 return error;
261 }
262 truncate_setsize(inode, attr->ia_size);
263 hfsplus_file_truncate(inode);
264 inode->i_mtime = inode->i_ctime = current_time(inode);
265 }
266
267 setattr_copy(inode, attr);
268 mark_inode_dirty(inode);
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 = file_write_and_wait_range(file, start, end);
282 if (error)
283 return error;
284 inode_lock(inode);
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 inode_unlock(inode);
326
327 return error;
328 }
329
330 static const struct inode_operations hfsplus_file_inode_operations = {
331 .setattr = hfsplus_setattr,
332 .listxattr = hfsplus_listxattr,
333 };
334
335 static const struct file_operations hfsplus_file_operations = {
336 .llseek = generic_file_llseek,
337 .read_iter = generic_file_read_iter,
338 .write_iter = generic_file_write_iter,
339 .mmap = generic_file_mmap,
340 .splice_read = generic_file_splice_read,
341 .fsync = hfsplus_file_fsync,
342 .open = hfsplus_file_open,
343 .release = hfsplus_file_release,
344 .unlocked_ioctl = hfsplus_ioctl,
345 };
346
347 struct inode *hfsplus_new_inode(struct super_block *sb, struct inode *dir,
348 umode_t mode)
349 {
350 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
351 struct inode *inode = new_inode(sb);
352 struct hfsplus_inode_info *hip;
353
354 if (!inode)
355 return NULL;
356
357 inode->i_ino = sbi->next_cnid++;
358 inode_init_owner(inode, dir, mode);
359 set_nlink(inode, 1);
360 inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
361
362 hip = HFSPLUS_I(inode);
363 INIT_LIST_HEAD(&hip->open_dir_list);
364 spin_lock_init(&hip->open_dir_lock);
365 mutex_init(&hip->extents_lock);
366 atomic_set(&hip->opencnt, 0);
367 hip->extent_state = 0;
368 hip->flags = 0;
369 hip->userflags = 0;
370 hip->subfolders = 0;
371 memset(hip->first_extents, 0, sizeof(hfsplus_extent_rec));
372 memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
373 hip->alloc_blocks = 0;
374 hip->first_blocks = 0;
375 hip->cached_start = 0;
376 hip->cached_blocks = 0;
377 hip->phys_size = 0;
378 hip->fs_blocks = 0;
379 hip->rsrc_inode = NULL;
380 if (S_ISDIR(inode->i_mode)) {
381 inode->i_size = 2;
382 sbi->folder_count++;
383 inode->i_op = &hfsplus_dir_inode_operations;
384 inode->i_fop = &hfsplus_dir_operations;
385 } else if (S_ISREG(inode->i_mode)) {
386 sbi->file_count++;
387 inode->i_op = &hfsplus_file_inode_operations;
388 inode->i_fop = &hfsplus_file_operations;
389 inode->i_mapping->a_ops = &hfsplus_aops;
390 hip->clump_blocks = sbi->data_clump_blocks;
391 } else if (S_ISLNK(inode->i_mode)) {
392 sbi->file_count++;
393 inode->i_op = &page_symlink_inode_operations;
394 inode_nohighmem(inode);
395 inode->i_mapping->a_ops = &hfsplus_aops;
396 hip->clump_blocks = 1;
397 } else
398 sbi->file_count++;
399 insert_inode_hash(inode);
400 mark_inode_dirty(inode);
401 hfsplus_mark_mdb_dirty(sb);
402
403 return inode;
404 }
405
406 void hfsplus_delete_inode(struct inode *inode)
407 {
408 struct super_block *sb = inode->i_sb;
409
410 if (S_ISDIR(inode->i_mode)) {
411 HFSPLUS_SB(sb)->folder_count--;
412 hfsplus_mark_mdb_dirty(sb);
413 return;
414 }
415 HFSPLUS_SB(sb)->file_count--;
416 if (S_ISREG(inode->i_mode)) {
417 if (!inode->i_nlink) {
418 inode->i_size = 0;
419 hfsplus_file_truncate(inode);
420 }
421 } else if (S_ISLNK(inode->i_mode)) {
422 inode->i_size = 0;
423 hfsplus_file_truncate(inode);
424 }
425 hfsplus_mark_mdb_dirty(sb);
426 }
427
428 void hfsplus_inode_read_fork(struct inode *inode, struct hfsplus_fork_raw *fork)
429 {
430 struct super_block *sb = inode->i_sb;
431 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
432 struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
433 u32 count;
434 int i;
435
436 memcpy(&hip->first_extents, &fork->extents, sizeof(hfsplus_extent_rec));
437 for (count = 0, i = 0; i < 8; i++)
438 count += be32_to_cpu(fork->extents[i].block_count);
439 hip->first_blocks = count;
440 memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
441 hip->cached_start = 0;
442 hip->cached_blocks = 0;
443
444 hip->alloc_blocks = be32_to_cpu(fork->total_blocks);
445 hip->phys_size = inode->i_size = be64_to_cpu(fork->total_size);
446 hip->fs_blocks =
447 (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
448 inode_set_bytes(inode, hip->fs_blocks << sb->s_blocksize_bits);
449 hip->clump_blocks =
450 be32_to_cpu(fork->clump_size) >> sbi->alloc_blksz_shift;
451 if (!hip->clump_blocks) {
452 hip->clump_blocks = HFSPLUS_IS_RSRC(inode) ?
453 sbi->rsrc_clump_blocks :
454 sbi->data_clump_blocks;
455 }
456 }
457
458 void hfsplus_inode_write_fork(struct inode *inode,
459 struct hfsplus_fork_raw *fork)
460 {
461 memcpy(&fork->extents, &HFSPLUS_I(inode)->first_extents,
462 sizeof(hfsplus_extent_rec));
463 fork->total_size = cpu_to_be64(inode->i_size);
464 fork->total_blocks = cpu_to_be32(HFSPLUS_I(inode)->alloc_blocks);
465 }
466
467 int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd)
468 {
469 hfsplus_cat_entry entry;
470 int res = 0;
471 u16 type;
472
473 type = hfs_bnode_read_u16(fd->bnode, fd->entryoffset);
474
475 HFSPLUS_I(inode)->linkid = 0;
476 if (type == HFSPLUS_FOLDER) {
477 struct hfsplus_cat_folder *folder = &entry.folder;
478
479 if (fd->entrylength < sizeof(struct hfsplus_cat_folder))
480 /* panic? */;
481 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
482 sizeof(struct hfsplus_cat_folder));
483 hfsplus_get_perms(inode, &folder->permissions, 1);
484 set_nlink(inode, 1);
485 inode->i_size = 2 + be32_to_cpu(folder->valence);
486 inode->i_atime = timespec_to_timespec64(hfsp_mt2ut(folder->access_date));
487 inode->i_mtime = timespec_to_timespec64(hfsp_mt2ut(folder->content_mod_date));
488 inode->i_ctime = timespec_to_timespec64(hfsp_mt2ut(folder->attribute_mod_date));
489 HFSPLUS_I(inode)->create_date = folder->create_date;
490 HFSPLUS_I(inode)->fs_blocks = 0;
491 if (folder->flags & cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT)) {
492 HFSPLUS_I(inode)->subfolders =
493 be32_to_cpu(folder->subfolders);
494 }
495 inode->i_op = &hfsplus_dir_inode_operations;
496 inode->i_fop = &hfsplus_dir_operations;
497 } else if (type == HFSPLUS_FILE) {
498 struct hfsplus_cat_file *file = &entry.file;
499
500 if (fd->entrylength < sizeof(struct hfsplus_cat_file))
501 /* panic? */;
502 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
503 sizeof(struct hfsplus_cat_file));
504
505 hfsplus_inode_read_fork(inode, HFSPLUS_IS_RSRC(inode) ?
506 &file->rsrc_fork : &file->data_fork);
507 hfsplus_get_perms(inode, &file->permissions, 0);
508 set_nlink(inode, 1);
509 if (S_ISREG(inode->i_mode)) {
510 if (file->permissions.dev)
511 set_nlink(inode,
512 be32_to_cpu(file->permissions.dev));
513 inode->i_op = &hfsplus_file_inode_operations;
514 inode->i_fop = &hfsplus_file_operations;
515 inode->i_mapping->a_ops = &hfsplus_aops;
516 } else if (S_ISLNK(inode->i_mode)) {
517 inode->i_op = &page_symlink_inode_operations;
518 inode_nohighmem(inode);
519 inode->i_mapping->a_ops = &hfsplus_aops;
520 } else {
521 init_special_inode(inode, inode->i_mode,
522 be32_to_cpu(file->permissions.dev));
523 }
524 inode->i_atime = timespec_to_timespec64(hfsp_mt2ut(file->access_date));
525 inode->i_mtime = timespec_to_timespec64(hfsp_mt2ut(file->content_mod_date));
526 inode->i_ctime = timespec_to_timespec64(hfsp_mt2ut(file->attribute_mod_date));
527 HFSPLUS_I(inode)->create_date = file->create_date;
528 } else {
529 pr_err("bad catalog entry used to create inode\n");
530 res = -EIO;
531 }
532 return res;
533 }
534
535 int hfsplus_cat_write_inode(struct inode *inode)
536 {
537 struct inode *main_inode = inode;
538 struct hfs_find_data fd;
539 hfsplus_cat_entry entry;
540
541 if (HFSPLUS_IS_RSRC(inode))
542 main_inode = HFSPLUS_I(inode)->rsrc_inode;
543
544 if (!main_inode->i_nlink)
545 return 0;
546
547 if (hfs_find_init(HFSPLUS_SB(main_inode->i_sb)->cat_tree, &fd))
548 /* panic? */
549 return -EIO;
550
551 if (hfsplus_find_cat(main_inode->i_sb, main_inode->i_ino, &fd))
552 /* panic? */
553 goto out;
554
555 if (S_ISDIR(main_inode->i_mode)) {
556 struct hfsplus_cat_folder *folder = &entry.folder;
557
558 if (fd.entrylength < sizeof(struct hfsplus_cat_folder))
559 /* panic? */;
560 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
561 sizeof(struct hfsplus_cat_folder));
562 /* simple node checks? */
563 hfsplus_cat_set_perms(inode, &folder->permissions);
564 folder->access_date = hfsp_ut2mt(inode->i_atime);
565 folder->content_mod_date = hfsp_ut2mt(inode->i_mtime);
566 folder->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
567 folder->valence = cpu_to_be32(inode->i_size - 2);
568 if (folder->flags & cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT)) {
569 folder->subfolders =
570 cpu_to_be32(HFSPLUS_I(inode)->subfolders);
571 }
572 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
573 sizeof(struct hfsplus_cat_folder));
574 } else if (HFSPLUS_IS_RSRC(inode)) {
575 struct hfsplus_cat_file *file = &entry.file;
576 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
577 sizeof(struct hfsplus_cat_file));
578 hfsplus_inode_write_fork(inode, &file->rsrc_fork);
579 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
580 sizeof(struct hfsplus_cat_file));
581 } else {
582 struct hfsplus_cat_file *file = &entry.file;
583
584 if (fd.entrylength < sizeof(struct hfsplus_cat_file))
585 /* panic? */;
586 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
587 sizeof(struct hfsplus_cat_file));
588 hfsplus_inode_write_fork(inode, &file->data_fork);
589 hfsplus_cat_set_perms(inode, &file->permissions);
590 if (HFSPLUS_FLG_IMMUTABLE &
591 (file->permissions.rootflags |
592 file->permissions.userflags))
593 file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED);
594 else
595 file->flags &= cpu_to_be16(~HFSPLUS_FILE_LOCKED);
596 file->access_date = hfsp_ut2mt(inode->i_atime);
597 file->content_mod_date = hfsp_ut2mt(inode->i_mtime);
598 file->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
599 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
600 sizeof(struct hfsplus_cat_file));
601 }
602
603 set_bit(HFSPLUS_I_CAT_DIRTY, &HFSPLUS_I(inode)->flags);
604 out:
605 hfs_find_exit(&fd);
606 return 0;
607 }
Linux with added FPC-III support