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