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mmc: Add helper function to check if a card is removable
[linux-2.6.git] / fs / hfs / inode.c
blob397b7adc7ce668dd2880fa73b4f5ee6cf1b050a2
1 /*
2 * linux/fs/hfs/inode.c
3 *
4 * Copyright (C) 1995-1997 Paul H. Hargrove
5 * (C) 2003 Ardis Technologies <roman@ardistech.com>
6 * This file may be distributed under the terms of the GNU General Public License.
7 *
8 * This file contains inode-related functions which do not depend on
9 * which scheme is being used to represent forks.
10 *
11 * Based on the minix file system code, (C) 1991, 1992 by Linus Torvalds
12 */
13
14 #include <linux/pagemap.h>
15 #include <linux/mpage.h>
16 #include <linux/sched.h>
17
18 #include "hfs_fs.h"
19 #include "btree.h"
20
21 static const struct file_operations hfs_file_operations;
22 static const struct inode_operations hfs_file_inode_operations;
23
24 /*================ Variable-like macros ================*/
25
26 #define HFS_VALID_MODE_BITS (S_IFREG | S_IFDIR | S_IRWXUGO)
27
28 static int hfs_writepage(struct page *page, struct writeback_control *wbc)
29 {
30 return block_write_full_page(page, hfs_get_block, wbc);
31 }
32
33 static int hfs_readpage(struct file *file, struct page *page)
34 {
35 return block_read_full_page(page, hfs_get_block);
36 }
37
38 static int hfs_write_begin(struct file *file, struct address_space *mapping,
39 loff_t pos, unsigned len, unsigned flags,
40 struct page **pagep, void **fsdata)
41 {
42 int ret;
43
44 *pagep = NULL;
45 ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
46 hfs_get_block,
47 &HFS_I(mapping->host)->phys_size);
48 if (unlikely(ret)) {
49 loff_t isize = mapping->host->i_size;
50 if (pos + len > isize)
51 vmtruncate(mapping->host, isize);
52 }
53
54 return ret;
55 }
56
57 static sector_t hfs_bmap(struct address_space *mapping, sector_t block)
58 {
59 return generic_block_bmap(mapping, block, hfs_get_block);
60 }
61
62 static int hfs_releasepage(struct page *page, gfp_t mask)
63 {
64 struct inode *inode = page->mapping->host;
65 struct super_block *sb = inode->i_sb;
66 struct hfs_btree *tree;
67 struct hfs_bnode *node;
68 u32 nidx;
69 int i, res = 1;
70
71 switch (inode->i_ino) {
72 case HFS_EXT_CNID:
73 tree = HFS_SB(sb)->ext_tree;
74 break;
75 case HFS_CAT_CNID:
76 tree = HFS_SB(sb)->cat_tree;
77 break;
78 default:
79 BUG();
80 return 0;
81 }
82
83 if (!tree)
84 return 0;
85
86 if (tree->node_size >= PAGE_CACHE_SIZE) {
87 nidx = page->index >> (tree->node_size_shift - PAGE_CACHE_SHIFT);
88 spin_lock(&tree->hash_lock);
89 node = hfs_bnode_findhash(tree, nidx);
90 if (!node)
91 ;
92 else if (atomic_read(&node->refcnt))
93 res = 0;
94 if (res && node) {
95 hfs_bnode_unhash(node);
96 hfs_bnode_free(node);
97 }
98 spin_unlock(&tree->hash_lock);
99 } else {
100 nidx = page->index << (PAGE_CACHE_SHIFT - tree->node_size_shift);
101 i = 1 << (PAGE_CACHE_SHIFT - tree->node_size_shift);
102 spin_lock(&tree->hash_lock);
103 do {
104 node = hfs_bnode_findhash(tree, nidx++);
105 if (!node)
106 continue;
107 if (atomic_read(&node->refcnt)) {
108 res = 0;
109 break;
110 }
111 hfs_bnode_unhash(node);
112 hfs_bnode_free(node);
113 } while (--i && nidx < tree->node_count);
114 spin_unlock(&tree->hash_lock);
115 }
116 return res ? try_to_free_buffers(page) : 0;
117 }
118
119 static ssize_t hfs_direct_IO(int rw, struct kiocb *iocb,
120 const struct iovec *iov, loff_t offset, unsigned long nr_segs)
121 {
122 struct file *file = iocb->ki_filp;
123 struct inode *inode = file->f_path.dentry->d_inode->i_mapping->host;
124 ssize_t ret;
125
126 ret = blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
127 offset, nr_segs, hfs_get_block, NULL);
128
129 /*
130 * In case of error extending write may have instantiated a few
131 * blocks outside i_size. Trim these off again.
132 */
133 if (unlikely((rw & WRITE) && ret < 0)) {
134 loff_t isize = i_size_read(inode);
135 loff_t end = offset + iov_length(iov, nr_segs);
136
137 if (end > isize)
138 vmtruncate(inode, isize);
139 }
140
141 return ret;
142 }
143
144 static int hfs_writepages(struct address_space *mapping,
145 struct writeback_control *wbc)
146 {
147 return mpage_writepages(mapping, wbc, hfs_get_block);
148 }
149
150 const struct address_space_operations hfs_btree_aops = {
151 .readpage = hfs_readpage,
152 .writepage = hfs_writepage,
153 .sync_page = block_sync_page,
154 .write_begin = hfs_write_begin,
155 .write_end = generic_write_end,
156 .bmap = hfs_bmap,
157 .releasepage = hfs_releasepage,
158 };
159
160 const struct address_space_operations hfs_aops = {
161 .readpage = hfs_readpage,
162 .writepage = hfs_writepage,
163 .sync_page = block_sync_page,
164 .write_begin = hfs_write_begin,
165 .write_end = generic_write_end,
166 .bmap = hfs_bmap,
167 .direct_IO = hfs_direct_IO,
168 .writepages = hfs_writepages,
169 };
170
171 /*
172 * hfs_new_inode
173 */
174 struct inode *hfs_new_inode(struct inode *dir, struct qstr *name, int mode)
175 {
176 struct super_block *sb = dir->i_sb;
177 struct inode *inode = new_inode(sb);
178 if (!inode)
179 return NULL;
180
181 mutex_init(&HFS_I(inode)->extents_lock);
182 INIT_LIST_HEAD(&HFS_I(inode)->open_dir_list);
183 hfs_cat_build_key(sb, (btree_key *)&HFS_I(inode)->cat_key, dir->i_ino, name);
184 inode->i_ino = HFS_SB(sb)->next_id++;
185 inode->i_mode = mode;
186 inode->i_uid = current_fsuid();
187 inode->i_gid = current_fsgid();
188 inode->i_nlink = 1;
189 inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
190 HFS_I(inode)->flags = 0;
191 HFS_I(inode)->rsrc_inode = NULL;
192 HFS_I(inode)->fs_blocks = 0;
193 if (S_ISDIR(mode)) {
194 inode->i_size = 2;
195 HFS_SB(sb)->folder_count++;
196 if (dir->i_ino == HFS_ROOT_CNID)
197 HFS_SB(sb)->root_dirs++;
198 inode->i_op = &hfs_dir_inode_operations;
199 inode->i_fop = &hfs_dir_operations;
200 inode->i_mode |= S_IRWXUGO;
201 inode->i_mode &= ~HFS_SB(inode->i_sb)->s_dir_umask;
202 } else if (S_ISREG(mode)) {
203 HFS_I(inode)->clump_blocks = HFS_SB(sb)->clumpablks;
204 HFS_SB(sb)->file_count++;
205 if (dir->i_ino == HFS_ROOT_CNID)
206 HFS_SB(sb)->root_files++;
207 inode->i_op = &hfs_file_inode_operations;
208 inode->i_fop = &hfs_file_operations;
209 inode->i_mapping->a_ops = &hfs_aops;
210 inode->i_mode |= S_IRUGO|S_IXUGO;
211 if (mode & S_IWUSR)
212 inode->i_mode |= S_IWUGO;
213 inode->i_mode &= ~HFS_SB(inode->i_sb)->s_file_umask;
214 HFS_I(inode)->phys_size = 0;
215 HFS_I(inode)->alloc_blocks = 0;
216 HFS_I(inode)->first_blocks = 0;
217 HFS_I(inode)->cached_start = 0;
218 HFS_I(inode)->cached_blocks = 0;
219 memset(HFS_I(inode)->first_extents, 0, sizeof(hfs_extent_rec));
220 memset(HFS_I(inode)->cached_extents, 0, sizeof(hfs_extent_rec));
221 }
222 insert_inode_hash(inode);
223 mark_inode_dirty(inode);
224 set_bit(HFS_FLG_MDB_DIRTY, &HFS_SB(sb)->flags);
225 sb->s_dirt = 1;
226
227 return inode;
228 }
229
230 void hfs_delete_inode(struct inode *inode)
231 {
232 struct super_block *sb = inode->i_sb;
233
234 dprint(DBG_INODE, "delete_inode: %lu\n", inode->i_ino);
235 if (S_ISDIR(inode->i_mode)) {
236 HFS_SB(sb)->folder_count--;
237 if (HFS_I(inode)->cat_key.ParID == cpu_to_be32(HFS_ROOT_CNID))
238 HFS_SB(sb)->root_dirs--;
239 set_bit(HFS_FLG_MDB_DIRTY, &HFS_SB(sb)->flags);
240 sb->s_dirt = 1;
241 return;
242 }
243 HFS_SB(sb)->file_count--;
244 if (HFS_I(inode)->cat_key.ParID == cpu_to_be32(HFS_ROOT_CNID))
245 HFS_SB(sb)->root_files--;
246 if (S_ISREG(inode->i_mode)) {
247 if (!inode->i_nlink) {
248 inode->i_size = 0;
249 hfs_file_truncate(inode);
250 }
251 }
252 set_bit(HFS_FLG_MDB_DIRTY, &HFS_SB(sb)->flags);
253 sb->s_dirt = 1;
254 }
255
256 void hfs_inode_read_fork(struct inode *inode, struct hfs_extent *ext,
257 __be32 __log_size, __be32 phys_size, u32 clump_size)
258 {
259 struct super_block *sb = inode->i_sb;
260 u32 log_size = be32_to_cpu(__log_size);
261 u16 count;
262 int i;
263
264 memcpy(HFS_I(inode)->first_extents, ext, sizeof(hfs_extent_rec));
265 for (count = 0, i = 0; i < 3; i++)
266 count += be16_to_cpu(ext[i].count);
267 HFS_I(inode)->first_blocks = count;
268
269 inode->i_size = HFS_I(inode)->phys_size = log_size;
270 HFS_I(inode)->fs_blocks = (log_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
271 inode_set_bytes(inode, HFS_I(inode)->fs_blocks << sb->s_blocksize_bits);
272 HFS_I(inode)->alloc_blocks = be32_to_cpu(phys_size) /
273 HFS_SB(sb)->alloc_blksz;
274 HFS_I(inode)->clump_blocks = clump_size / HFS_SB(sb)->alloc_blksz;
275 if (!HFS_I(inode)->clump_blocks)
276 HFS_I(inode)->clump_blocks = HFS_SB(sb)->clumpablks;
277 }
278
279 struct hfs_iget_data {
280 struct hfs_cat_key *key;
281 hfs_cat_rec *rec;
282 };
283
284 static int hfs_test_inode(struct inode *inode, void *data)
285 {
286 struct hfs_iget_data *idata = data;
287 hfs_cat_rec *rec;
288
289 rec = idata->rec;
290 switch (rec->type) {
291 case HFS_CDR_DIR:
292 return inode->i_ino == be32_to_cpu(rec->dir.DirID);
293 case HFS_CDR_FIL:
294 return inode->i_ino == be32_to_cpu(rec->file.FlNum);
295 default:
296 BUG();
297 return 1;
298 }
299 }
300
301 /*
302 * hfs_read_inode
303 */
304 static int hfs_read_inode(struct inode *inode, void *data)
305 {
306 struct hfs_iget_data *idata = data;
307 struct hfs_sb_info *hsb = HFS_SB(inode->i_sb);
308 hfs_cat_rec *rec;
309
310 HFS_I(inode)->flags = 0;
311 HFS_I(inode)->rsrc_inode = NULL;
312 mutex_init(&HFS_I(inode)->extents_lock);
313 INIT_LIST_HEAD(&HFS_I(inode)->open_dir_list);
314
315 /* Initialize the inode */
316 inode->i_uid = hsb->s_uid;
317 inode->i_gid = hsb->s_gid;
318 inode->i_nlink = 1;
319
320 if (idata->key)
321 HFS_I(inode)->cat_key = *idata->key;
322 else
323 HFS_I(inode)->flags |= HFS_FLG_RSRC;
324 HFS_I(inode)->tz_secondswest = sys_tz.tz_minuteswest * 60;
325
326 rec = idata->rec;
327 switch (rec->type) {
328 case HFS_CDR_FIL:
329 if (!HFS_IS_RSRC(inode)) {
330 hfs_inode_read_fork(inode, rec->file.ExtRec, rec->file.LgLen,
331 rec->file.PyLen, be16_to_cpu(rec->file.ClpSize));
332 } else {
333 hfs_inode_read_fork(inode, rec->file.RExtRec, rec->file.RLgLen,
334 rec->file.RPyLen, be16_to_cpu(rec->file.ClpSize));
335 }
336
337 inode->i_ino = be32_to_cpu(rec->file.FlNum);
338 inode->i_mode = S_IRUGO | S_IXUGO;
339 if (!(rec->file.Flags & HFS_FIL_LOCK))
340 inode->i_mode |= S_IWUGO;
341 inode->i_mode &= ~hsb->s_file_umask;
342 inode->i_mode |= S_IFREG;
343 inode->i_ctime = inode->i_atime = inode->i_mtime =
344 hfs_m_to_utime(rec->file.MdDat);
345 inode->i_op = &hfs_file_inode_operations;
346 inode->i_fop = &hfs_file_operations;
347 inode->i_mapping->a_ops = &hfs_aops;
348 break;
349 case HFS_CDR_DIR:
350 inode->i_ino = be32_to_cpu(rec->dir.DirID);
351 inode->i_size = be16_to_cpu(rec->dir.Val) + 2;
352 HFS_I(inode)->fs_blocks = 0;
353 inode->i_mode = S_IFDIR | (S_IRWXUGO & ~hsb->s_dir_umask);
354 inode->i_ctime = inode->i_atime = inode->i_mtime =
355 hfs_m_to_utime(rec->dir.MdDat);
356 inode->i_op = &hfs_dir_inode_operations;
357 inode->i_fop = &hfs_dir_operations;
358 break;
359 default:
360 make_bad_inode(inode);
361 }
362 return 0;
363 }
364
365 /*
366 * __hfs_iget()
367 *
368 * Given the MDB for a HFS filesystem, a 'key' and an 'entry' in
369 * the catalog B-tree and the 'type' of the desired file return the
370 * inode for that file/directory or NULL. Note that 'type' indicates
371 * whether we want the actual file or directory, or the corresponding
372 * metadata (AppleDouble header file or CAP metadata file).
373 */
374 struct inode *hfs_iget(struct super_block *sb, struct hfs_cat_key *key, hfs_cat_rec *rec)
375 {
376 struct hfs_iget_data data = { key, rec };
377 struct inode *inode;
378 u32 cnid;
379
380 switch (rec->type) {
381 case HFS_CDR_DIR:
382 cnid = be32_to_cpu(rec->dir.DirID);
383 break;
384 case HFS_CDR_FIL:
385 cnid = be32_to_cpu(rec->file.FlNum);
386 break;
387 default:
388 return NULL;
389 }
390 inode = iget5_locked(sb, cnid, hfs_test_inode, hfs_read_inode, &data);
391 if (inode && (inode->i_state & I_NEW))
392 unlock_new_inode(inode);
393 return inode;
394 }
395
396 void hfs_inode_write_fork(struct inode *inode, struct hfs_extent *ext,
397 __be32 *log_size, __be32 *phys_size)
398 {
399 memcpy(ext, HFS_I(inode)->first_extents, sizeof(hfs_extent_rec));
400
401 if (log_size)
402 *log_size = cpu_to_be32(inode->i_size);
403 if (phys_size)
404 *phys_size = cpu_to_be32(HFS_I(inode)->alloc_blocks *
405 HFS_SB(inode->i_sb)->alloc_blksz);
406 }
407
408 int hfs_write_inode(struct inode *inode, struct writeback_control *wbc)
409 {
410 struct inode *main_inode = inode;
411 struct hfs_find_data fd;
412 hfs_cat_rec rec;
413
414 dprint(DBG_INODE, "hfs_write_inode: %lu\n", inode->i_ino);
415 hfs_ext_write_extent(inode);
416
417 if (inode->i_ino < HFS_FIRSTUSER_CNID) {
418 switch (inode->i_ino) {
419 case HFS_ROOT_CNID:
420 break;
421 case HFS_EXT_CNID:
422 hfs_btree_write(HFS_SB(inode->i_sb)->ext_tree);
423 return 0;
424 case HFS_CAT_CNID:
425 hfs_btree_write(HFS_SB(inode->i_sb)->cat_tree);
426 return 0;
427 default:
428 BUG();
429 return -EIO;
430 }
431 }
432
433 if (HFS_IS_RSRC(inode))
434 main_inode = HFS_I(inode)->rsrc_inode;
435
436 if (!main_inode->i_nlink)
437 return 0;
438
439 if (hfs_find_init(HFS_SB(main_inode->i_sb)->cat_tree, &fd))
440 /* panic? */
441 return -EIO;
442
443 fd.search_key->cat = HFS_I(main_inode)->cat_key;
444 if (hfs_brec_find(&fd))
445 /* panic? */
446 goto out;
447
448 if (S_ISDIR(main_inode->i_mode)) {
449 if (fd.entrylength < sizeof(struct hfs_cat_dir))
450 /* panic? */;
451 hfs_bnode_read(fd.bnode, &rec, fd.entryoffset,
452 sizeof(struct hfs_cat_dir));
453 if (rec.type != HFS_CDR_DIR ||
454 be32_to_cpu(rec.dir.DirID) != inode->i_ino) {
455 }
456
457 rec.dir.MdDat = hfs_u_to_mtime(inode->i_mtime);
458 rec.dir.Val = cpu_to_be16(inode->i_size - 2);
459
460 hfs_bnode_write(fd.bnode, &rec, fd.entryoffset,
461 sizeof(struct hfs_cat_dir));
462 } else if (HFS_IS_RSRC(inode)) {
463 hfs_bnode_read(fd.bnode, &rec, fd.entryoffset,
464 sizeof(struct hfs_cat_file));
465 hfs_inode_write_fork(inode, rec.file.RExtRec,
466 &rec.file.RLgLen, &rec.file.RPyLen);
467 hfs_bnode_write(fd.bnode, &rec, fd.entryoffset,
468 sizeof(struct hfs_cat_file));
469 } else {
470 if (fd.entrylength < sizeof(struct hfs_cat_file))
471 /* panic? */;
472 hfs_bnode_read(fd.bnode, &rec, fd.entryoffset,
473 sizeof(struct hfs_cat_file));
474 if (rec.type != HFS_CDR_FIL ||
475 be32_to_cpu(rec.file.FlNum) != inode->i_ino) {
476 }
477
478 if (inode->i_mode & S_IWUSR)
479 rec.file.Flags &= ~HFS_FIL_LOCK;
480 else
481 rec.file.Flags |= HFS_FIL_LOCK;
482 hfs_inode_write_fork(inode, rec.file.ExtRec, &rec.file.LgLen, &rec.file.PyLen);
483 rec.file.MdDat = hfs_u_to_mtime(inode->i_mtime);
484
485 hfs_bnode_write(fd.bnode, &rec, fd.entryoffset,
486 sizeof(struct hfs_cat_file));
487 }
488 out:
489 hfs_find_exit(&fd);
490 return 0;
491 }
492
493 static struct dentry *hfs_file_lookup(struct inode *dir, struct dentry *dentry,
494 struct nameidata *nd)
495 {
496 struct inode *inode = NULL;
497 hfs_cat_rec rec;
498 struct hfs_find_data fd;
499 int res;
500
501 if (HFS_IS_RSRC(dir) || strcmp(dentry->d_name.name, "rsrc"))
502 goto out;
503
504 inode = HFS_I(dir)->rsrc_inode;
505 if (inode)
506 goto out;
507
508 inode = new_inode(dir->i_sb);
509 if (!inode)
510 return ERR_PTR(-ENOMEM);
511
512 hfs_find_init(HFS_SB(dir->i_sb)->cat_tree, &fd);
513 fd.search_key->cat = HFS_I(dir)->cat_key;
514 res = hfs_brec_read(&fd, &rec, sizeof(rec));
515 if (!res) {
516 struct hfs_iget_data idata = { NULL, &rec };
517 hfs_read_inode(inode, &idata);
518 }
519 hfs_find_exit(&fd);
520 if (res) {
521 iput(inode);
522 return ERR_PTR(res);
523 }
524 HFS_I(inode)->rsrc_inode = dir;
525 HFS_I(dir)->rsrc_inode = inode;
526 igrab(dir);
527 hlist_add_head(&inode->i_hash, &HFS_SB(dir->i_sb)->rsrc_inodes);
528 mark_inode_dirty(inode);
529 out:
530 d_add(dentry, inode);
531 return NULL;
532 }
533
534 void hfs_evict_inode(struct inode *inode)
535 {
536 truncate_inode_pages(&inode->i_data, 0);
537 end_writeback(inode);
538 if (HFS_IS_RSRC(inode) && HFS_I(inode)->rsrc_inode) {
539 HFS_I(HFS_I(inode)->rsrc_inode)->rsrc_inode = NULL;
540 iput(HFS_I(inode)->rsrc_inode);
541 }
542 }
543
544 static int hfs_file_open(struct inode *inode, struct file *file)
545 {
546 if (HFS_IS_RSRC(inode))
547 inode = HFS_I(inode)->rsrc_inode;
548 atomic_inc(&HFS_I(inode)->opencnt);
549 return 0;
550 }
551
552 static int hfs_file_release(struct inode *inode, struct file *file)
553 {
554 //struct super_block *sb = inode->i_sb;
555
556 if (HFS_IS_RSRC(inode))
557 inode = HFS_I(inode)->rsrc_inode;
558 if (atomic_dec_and_test(&HFS_I(inode)->opencnt)) {
559 mutex_lock(&inode->i_mutex);
560 hfs_file_truncate(inode);
561 //if (inode->i_flags & S_DEAD) {
562 // hfs_delete_cat(inode->i_ino, HFSPLUS_SB(sb).hidden_dir, NULL);
563 // hfs_delete_inode(inode);
564 //}
565 mutex_unlock(&inode->i_mutex);
566 }
567 return 0;
568 }
569
570 /*
571 * hfs_notify_change()
572 *
573 * Based very closely on fs/msdos/inode.c by Werner Almesberger
574 *
575 * This is the notify_change() field in the super_operations structure
576 * for HFS file systems. The purpose is to take that changes made to
577 * an inode and apply then in a filesystem-dependent manner. In this
578 * case the process has a few of tasks to do:
579 * 1) prevent changes to the i_uid and i_gid fields.
580 * 2) map file permissions to the closest allowable permissions
581 * 3) Since multiple Linux files can share the same on-disk inode under
582 * HFS (for instance the data and resource forks of a file) a change
583 * to permissions must be applied to all other in-core inodes which
584 * correspond to the same HFS file.
585 */
586
587 int hfs_inode_setattr(struct dentry *dentry, struct iattr * attr)
588 {
589 struct inode *inode = dentry->d_inode;
590 struct hfs_sb_info *hsb = HFS_SB(inode->i_sb);
591 int error;
592
593 error = inode_change_ok(inode, attr); /* basic permission checks */
594 if (error)
595 return error;
596
597 /* no uig/gid changes and limit which mode bits can be set */
598 if (((attr->ia_valid & ATTR_UID) &&
599 (attr->ia_uid != hsb->s_uid)) ||
600 ((attr->ia_valid & ATTR_GID) &&
601 (attr->ia_gid != hsb->s_gid)) ||
602 ((attr->ia_valid & ATTR_MODE) &&
603 ((S_ISDIR(inode->i_mode) &&
604 (attr->ia_mode != inode->i_mode)) ||
605 (attr->ia_mode & ~HFS_VALID_MODE_BITS)))) {
606 return hsb->s_quiet ? 0 : error;
607 }
608
609 if (attr->ia_valid & ATTR_MODE) {
610 /* Only the 'w' bits can ever change and only all together. */
611 if (attr->ia_mode & S_IWUSR)
612 attr->ia_mode = inode->i_mode | S_IWUGO;
613 else
614 attr->ia_mode = inode->i_mode & ~S_IWUGO;
615 attr->ia_mode &= S_ISDIR(inode->i_mode) ? ~hsb->s_dir_umask: ~hsb->s_file_umask;
616 }
617
618 if ((attr->ia_valid & ATTR_SIZE) &&
619 attr->ia_size != i_size_read(inode)) {
620 error = vmtruncate(inode, attr->ia_size);
621 if (error)
622 return error;
623 }
624
625 setattr_copy(inode, attr);
626 mark_inode_dirty(inode);
627 return 0;
628 }
629
630 static int hfs_file_fsync(struct file *filp, int datasync)
631 {
632 struct inode *inode = filp->f_mapping->host;
633 struct super_block * sb;
634 int ret, err;
635
636 /* sync the inode to buffers */
637 ret = write_inode_now(inode, 0);
638
639 /* sync the superblock to buffers */
640 sb = inode->i_sb;
641 if (sb->s_dirt) {
642 lock_super(sb);
643 sb->s_dirt = 0;
644 if (!(sb->s_flags & MS_RDONLY))
645 hfs_mdb_commit(sb);
646 unlock_super(sb);
647 }
648 /* .. finally sync the buffers to disk */
649 err = sync_blockdev(sb->s_bdev);
650 if (!ret)
651 ret = err;
652 return ret;
653 }
654
655 static const struct file_operations hfs_file_operations = {
656 .llseek = generic_file_llseek,
657 .read = do_sync_read,
658 .aio_read = generic_file_aio_read,
659 .write = do_sync_write,
660 .aio_write = generic_file_aio_write,
661 .mmap = generic_file_mmap,
662 .splice_read = generic_file_splice_read,
663 .fsync = hfs_file_fsync,
664 .open = hfs_file_open,
665 .release = hfs_file_release,
666 };
667
668 static const struct inode_operations hfs_file_inode_operations = {
669 .lookup = hfs_file_lookup,
670 .truncate = hfs_file_truncate,
671 .setattr = hfs_inode_setattr,
672 .setxattr = hfs_setxattr,
673 .getxattr = hfs_getxattr,
674 .listxattr = hfs_listxattr,
675 };
Linus' kernel tree