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ASoC: neo1973_wm8753: Post gta01 support removal cleanup
[linux-2.6/btrfs-unstable.git] / fs / hfsplus / inode.c
blobfa929f325f87502074d66e208c1a57feba089c82
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 const struct iovec *iov, loff_t offset, unsigned long nr_segs)
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 ssize_t ret;
132
133 ret = blockdev_direct_IO(rw, iocb, inode, iov, offset, nr_segs,
134 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((rw & WRITE) && ret < 0)) {
141 loff_t isize = i_size_read(inode);
142 loff_t end = offset + iov_length(iov, nr_segs);
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 mutex_lock(&inode->i_mutex);
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 mutex_unlock(&inode->i_mutex);
240 }
241 return 0;
242 }
243
244 static int hfsplus_setattr(struct dentry *dentry, struct iattr *attr)
245 {
246 struct inode *inode = dentry->d_inode;
247 int error;
248
249 error = inode_change_ok(inode, 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 truncate_setsize(inode, attr->ia_size);
257 hfsplus_file_truncate(inode);
258 }
259
260 setattr_copy(inode, attr);
261 mark_inode_dirty(inode);
262
263 if (attr->ia_valid & ATTR_MODE) {
264 error = posix_acl_chmod(inode, inode->i_mode);
265 if (unlikely(error))
266 return error;
267 }
268
269 return 0;
270 }
271
272 int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end,
273 int datasync)
274 {
275 struct inode *inode = file->f_mapping->host;
276 struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
277 struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
278 int error = 0, error2;
279
280 error = filemap_write_and_wait_range(inode->i_mapping, start, end);
281 if (error)
282 return error;
283 mutex_lock(&inode->i_mutex);
284
285 /*
286 * Sync inode metadata into the catalog and extent trees.
287 */
288 sync_inode_metadata(inode, 1);
289
290 /*
291 * And explicitly write out the btrees.
292 */
293 if (test_and_clear_bit(HFSPLUS_I_CAT_DIRTY, &hip->flags))
294 error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping);
295
296 if (test_and_clear_bit(HFSPLUS_I_EXT_DIRTY, &hip->flags)) {
297 error2 =
298 filemap_write_and_wait(sbi->ext_tree->inode->i_mapping);
299 if (!error)
300 error = error2;
301 }
302
303 if (test_and_clear_bit(HFSPLUS_I_ATTR_DIRTY, &hip->flags)) {
304 if (sbi->attr_tree) {
305 error2 =
306 filemap_write_and_wait(
307 sbi->attr_tree->inode->i_mapping);
308 if (!error)
309 error = error2;
310 } else {
311 pr_err("sync non-existent attributes tree\n");
312 }
313 }
314
315 if (test_and_clear_bit(HFSPLUS_I_ALLOC_DIRTY, &hip->flags)) {
316 error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping);
317 if (!error)
318 error = error2;
319 }
320
321 if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags))
322 blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
323
324 mutex_unlock(&inode->i_mutex);
325
326 return error;
327 }
328
329 static const struct inode_operations hfsplus_file_inode_operations = {
330 .setattr = hfsplus_setattr,
331 .setxattr = generic_setxattr,
332 .getxattr = generic_getxattr,
333 .listxattr = hfsplus_listxattr,
334 .removexattr = generic_removexattr,
335 #ifdef CONFIG_HFSPLUS_FS_POSIX_ACL
336 .get_acl = hfsplus_get_posix_acl,
337 .set_acl = hfsplus_set_posix_acl,
338 #endif
339 };
340
341 static const struct file_operations hfsplus_file_operations = {
342 .llseek = generic_file_llseek,
343 .read = do_sync_read,
344 .aio_read = generic_file_aio_read,
345 .write = do_sync_write,
346 .aio_write = generic_file_aio_write,
347 .mmap = generic_file_mmap,
348 .splice_read = generic_file_splice_read,
349 .fsync = hfsplus_file_fsync,
350 .open = hfsplus_file_open,
351 .release = hfsplus_file_release,
352 .unlocked_ioctl = hfsplus_ioctl,
353 };
354
355 struct inode *hfsplus_new_inode(struct super_block *sb, umode_t mode)
356 {
357 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
358 struct inode *inode = new_inode(sb);
359 struct hfsplus_inode_info *hip;
360
361 if (!inode)
362 return NULL;
363
364 inode->i_ino = sbi->next_cnid++;
365 inode->i_mode = mode;
366 inode->i_uid = current_fsuid();
367 inode->i_gid = current_fsgid();
368 set_nlink(inode, 1);
369 inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
370
371 hip = HFSPLUS_I(inode);
372 INIT_LIST_HEAD(&hip->open_dir_list);
373 mutex_init(&hip->extents_lock);
374 atomic_set(&hip->opencnt, 0);
375 hip->extent_state = 0;
376 hip->flags = 0;
377 hip->userflags = 0;
378 memset(hip->first_extents, 0, sizeof(hfsplus_extent_rec));
379 memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
380 hip->alloc_blocks = 0;
381 hip->first_blocks = 0;
382 hip->cached_start = 0;
383 hip->cached_blocks = 0;
384 hip->phys_size = 0;
385 hip->fs_blocks = 0;
386 hip->rsrc_inode = NULL;
387 if (S_ISDIR(inode->i_mode)) {
388 inode->i_size = 2;
389 sbi->folder_count++;
390 inode->i_op = &hfsplus_dir_inode_operations;
391 inode->i_fop = &hfsplus_dir_operations;
392 } else if (S_ISREG(inode->i_mode)) {
393 sbi->file_count++;
394 inode->i_op = &hfsplus_file_inode_operations;
395 inode->i_fop = &hfsplus_file_operations;
396 inode->i_mapping->a_ops = &hfsplus_aops;
397 hip->clump_blocks = sbi->data_clump_blocks;
398 } else if (S_ISLNK(inode->i_mode)) {
399 sbi->file_count++;
400 inode->i_op = &page_symlink_inode_operations;
401 inode->i_mapping->a_ops = &hfsplus_aops;
402 hip->clump_blocks = 1;
403 } else
404 sbi->file_count++;
405 insert_inode_hash(inode);
406 mark_inode_dirty(inode);
407 hfsplus_mark_mdb_dirty(sb);
408
409 return inode;
410 }
411
412 void hfsplus_delete_inode(struct inode *inode)
413 {
414 struct super_block *sb = inode->i_sb;
415
416 if (S_ISDIR(inode->i_mode)) {
417 HFSPLUS_SB(sb)->folder_count--;
418 hfsplus_mark_mdb_dirty(sb);
419 return;
420 }
421 HFSPLUS_SB(sb)->file_count--;
422 if (S_ISREG(inode->i_mode)) {
423 if (!inode->i_nlink) {
424 inode->i_size = 0;
425 hfsplus_file_truncate(inode);
426 }
427 } else if (S_ISLNK(inode->i_mode)) {
428 inode->i_size = 0;
429 hfsplus_file_truncate(inode);
430 }
431 hfsplus_mark_mdb_dirty(sb);
432 }
433
434 void hfsplus_inode_read_fork(struct inode *inode, struct hfsplus_fork_raw *fork)
435 {
436 struct super_block *sb = inode->i_sb;
437 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
438 struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
439 u32 count;
440 int i;
441
442 memcpy(&hip->first_extents, &fork->extents, sizeof(hfsplus_extent_rec));
443 for (count = 0, i = 0; i < 8; i++)
444 count += be32_to_cpu(fork->extents[i].block_count);
445 hip->first_blocks = count;
446 memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
447 hip->cached_start = 0;
448 hip->cached_blocks = 0;
449
450 hip->alloc_blocks = be32_to_cpu(fork->total_blocks);
451 hip->phys_size = inode->i_size = be64_to_cpu(fork->total_size);
452 hip->fs_blocks =
453 (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
454 inode_set_bytes(inode, hip->fs_blocks << sb->s_blocksize_bits);
455 hip->clump_blocks =
456 be32_to_cpu(fork->clump_size) >> sbi->alloc_blksz_shift;
457 if (!hip->clump_blocks) {
458 hip->clump_blocks = HFSPLUS_IS_RSRC(inode) ?
459 sbi->rsrc_clump_blocks :
460 sbi->data_clump_blocks;
461 }
462 }
463
464 void hfsplus_inode_write_fork(struct inode *inode,
465 struct hfsplus_fork_raw *fork)
466 {
467 memcpy(&fork->extents, &HFSPLUS_I(inode)->first_extents,
468 sizeof(hfsplus_extent_rec));
469 fork->total_size = cpu_to_be64(inode->i_size);
470 fork->total_blocks = cpu_to_be32(HFSPLUS_I(inode)->alloc_blocks);
471 }
472
473 int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd)
474 {
475 hfsplus_cat_entry entry;
476 int res = 0;
477 u16 type;
478
479 type = hfs_bnode_read_u16(fd->bnode, fd->entryoffset);
480
481 HFSPLUS_I(inode)->linkid = 0;
482 if (type == HFSPLUS_FOLDER) {
483 struct hfsplus_cat_folder *folder = &entry.folder;
484
485 if (fd->entrylength < sizeof(struct hfsplus_cat_folder))
486 /* panic? */;
487 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
488 sizeof(struct hfsplus_cat_folder));
489 hfsplus_get_perms(inode, &folder->permissions, 1);
490 set_nlink(inode, 1);
491 inode->i_size = 2 + be32_to_cpu(folder->valence);
492 inode->i_atime = hfsp_mt2ut(folder->access_date);
493 inode->i_mtime = hfsp_mt2ut(folder->content_mod_date);
494 inode->i_ctime = hfsp_mt2ut(folder->attribute_mod_date);
495 HFSPLUS_I(inode)->create_date = folder->create_date;
496 HFSPLUS_I(inode)->fs_blocks = 0;
497 inode->i_op = &hfsplus_dir_inode_operations;
498 inode->i_fop = &hfsplus_dir_operations;
499 } else if (type == HFSPLUS_FILE) {
500 struct hfsplus_cat_file *file = &entry.file;
501
502 if (fd->entrylength < sizeof(struct hfsplus_cat_file))
503 /* panic? */;
504 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
505 sizeof(struct hfsplus_cat_file));
506
507 hfsplus_inode_read_fork(inode, HFSPLUS_IS_RSRC(inode) ?
508 &file->rsrc_fork : &file->data_fork);
509 hfsplus_get_perms(inode, &file->permissions, 0);
510 set_nlink(inode, 1);
511 if (S_ISREG(inode->i_mode)) {
512 if (file->permissions.dev)
513 set_nlink(inode,
514 be32_to_cpu(file->permissions.dev));
515 inode->i_op = &hfsplus_file_inode_operations;
516 inode->i_fop = &hfsplus_file_operations;
517 inode->i_mapping->a_ops = &hfsplus_aops;
518 } else if (S_ISLNK(inode->i_mode)) {
519 inode->i_op = &page_symlink_inode_operations;
520 inode->i_mapping->a_ops = &hfsplus_aops;
521 } else {
522 init_special_inode(inode, inode->i_mode,
523 be32_to_cpu(file->permissions.dev));
524 }
525 inode->i_atime = hfsp_mt2ut(file->access_date);
526 inode->i_mtime = hfsp_mt2ut(file->content_mod_date);
527 inode->i_ctime = hfsp_mt2ut(file->attribute_mod_date);
528 HFSPLUS_I(inode)->create_date = file->create_date;
529 } else {
530 pr_err("bad catalog entry used to create inode\n");
531 res = -EIO;
532 }
533 return res;
534 }
535
536 int hfsplus_cat_write_inode(struct inode *inode)
537 {
538 struct inode *main_inode = inode;
539 struct hfs_find_data fd;
540 hfsplus_cat_entry entry;
541
542 if (HFSPLUS_IS_RSRC(inode))
543 main_inode = HFSPLUS_I(inode)->rsrc_inode;
544
545 if (!main_inode->i_nlink)
546 return 0;
547
548 if (hfs_find_init(HFSPLUS_SB(main_inode->i_sb)->cat_tree, &fd))
549 /* panic? */
550 return -EIO;
551
552 if (hfsplus_find_cat(main_inode->i_sb, main_inode->i_ino, &fd))
553 /* panic? */
554 goto out;
555
556 if (S_ISDIR(main_inode->i_mode)) {
557 struct hfsplus_cat_folder *folder = &entry.folder;
558
559 if (fd.entrylength < sizeof(struct hfsplus_cat_folder))
560 /* panic? */;
561 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
562 sizeof(struct hfsplus_cat_folder));
563 /* simple node checks? */
564 hfsplus_cat_set_perms(inode, &folder->permissions);
565 folder->access_date = hfsp_ut2mt(inode->i_atime);
566 folder->content_mod_date = hfsp_ut2mt(inode->i_mtime);
567 folder->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
568 folder->valence = cpu_to_be32(inode->i_size - 2);
569 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
570 sizeof(struct hfsplus_cat_folder));
571 } else if (HFSPLUS_IS_RSRC(inode)) {
572 struct hfsplus_cat_file *file = &entry.file;
573 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
574 sizeof(struct hfsplus_cat_file));
575 hfsplus_inode_write_fork(inode, &file->rsrc_fork);
576 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
577 sizeof(struct hfsplus_cat_file));
578 } else {
579 struct hfsplus_cat_file *file = &entry.file;
580
581 if (fd.entrylength < sizeof(struct hfsplus_cat_file))
582 /* panic? */;
583 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
584 sizeof(struct hfsplus_cat_file));
585 hfsplus_inode_write_fork(inode, &file->data_fork);
586 hfsplus_cat_set_perms(inode, &file->permissions);
587 if (HFSPLUS_FLG_IMMUTABLE &
588 (file->permissions.rootflags |
589 file->permissions.userflags))
590 file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED);
591 else
592 file->flags &= cpu_to_be16(~HFSPLUS_FILE_LOCKED);
593 file->access_date = hfsp_ut2mt(inode->i_atime);
594 file->content_mod_date = hfsp_ut2mt(inode->i_mtime);
595 file->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
596 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
597 sizeof(struct hfsplus_cat_file));
598 }
599
600 set_bit(HFSPLUS_I_CAT_DIRTY, &HFSPLUS_I(inode)->flags);
601 out:
602 hfs_find_exit(&fd);
603 return 0;
604 }
(deprecated) Btrfs devel tree