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