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