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