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