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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
21static const struct file_operations hfs_file_operations;
22static const struct inode_operations hfs_file_inode_operations;
23
24
25
26#define HFS_VALID_MODE_BITS (S_IFREG | S_IFDIR | S_IRWXUGO)
27
28static int hfs_writepage(struct page *page, struct writeback_control *wbc)
29{
30 return block_write_full_page(page, hfs_get_block, wbc);
31}
32
33static int hfs_readpage(struct file *file, struct page *page)
34{
35 return block_read_full_page(page, hfs_get_block);
36}
37
38static 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
57static sector_t hfs_bmap(struct address_space *mapping, sector_t block)
58{
59 return generic_block_bmap(mapping, block, hfs_get_block);
60}
61
62static 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
119static 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, iov, offset, nr_segs,
127 hfs_get_block);
128
129
130
131
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
144static int hfs_writepages(struct address_space *mapping,
145 struct writeback_control *wbc)
146{
147 return mpage_writepages(mapping, wbc, hfs_get_block);
148}
149
150const struct address_space_operations hfs_btree_aops = {
151 .readpage = hfs_readpage,
152 .writepage = hfs_writepage,
153 .write_begin = hfs_write_begin,
154 .write_end = generic_write_end,
155 .bmap = hfs_bmap,
156 .releasepage = hfs_releasepage,
157};
158
159const struct address_space_operations hfs_aops = {
160 .readpage = hfs_readpage,
161 .writepage = hfs_writepage,
162 .write_begin = hfs_write_begin,
163 .write_end = generic_write_end,
164 .bmap = hfs_bmap,
165 .direct_IO = hfs_direct_IO,
166 .writepages = hfs_writepages,
167};
168
169
170
171
172struct inode *hfs_new_inode(struct inode *dir, struct qstr *name, int mode)
173{
174 struct super_block *sb = dir->i_sb;
175 struct inode *inode = new_inode(sb);
176 if (!inode)
177 return NULL;
178
179 mutex_init(&HFS_I(inode)->extents_lock);
180 INIT_LIST_HEAD(&HFS_I(inode)->open_dir_list);
181 hfs_cat_build_key(sb, (btree_key *)&HFS_I(inode)->cat_key, dir->i_ino, name);
182 inode->i_ino = HFS_SB(sb)->next_id++;
183 inode->i_mode = mode;
184 inode->i_uid = current_fsuid();
185 inode->i_gid = current_fsgid();
186 set_nlink(inode, 1);
187 inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
188 HFS_I(inode)->flags = 0;
189 HFS_I(inode)->rsrc_inode = NULL;
190 HFS_I(inode)->fs_blocks = 0;
191 if (S_ISDIR(mode)) {
192 inode->i_size = 2;
193 HFS_SB(sb)->folder_count++;
194 if (dir->i_ino == HFS_ROOT_CNID)
195 HFS_SB(sb)->root_dirs++;
196 inode->i_op = &hfs_dir_inode_operations;
197 inode->i_fop = &hfs_dir_operations;
198 inode->i_mode |= S_IRWXUGO;
199 inode->i_mode &= ~HFS_SB(inode->i_sb)->s_dir_umask;
200 } else if (S_ISREG(mode)) {
201 HFS_I(inode)->clump_blocks = HFS_SB(sb)->clumpablks;
202 HFS_SB(sb)->file_count++;
203 if (dir->i_ino == HFS_ROOT_CNID)
204 HFS_SB(sb)->root_files++;
205 inode->i_op = &hfs_file_inode_operations;
206 inode->i_fop = &hfs_file_operations;
207 inode->i_mapping->a_ops = &hfs_aops;
208 inode->i_mode |= S_IRUGO|S_IXUGO;
209 if (mode & S_IWUSR)
210 inode->i_mode |= S_IWUGO;
211 inode->i_mode &= ~HFS_SB(inode->i_sb)->s_file_umask;
212 HFS_I(inode)->phys_size = 0;
213 HFS_I(inode)->alloc_blocks = 0;
214 HFS_I(inode)->first_blocks = 0;
215 HFS_I(inode)->cached_start = 0;
216 HFS_I(inode)->cached_blocks = 0;
217 memset(HFS_I(inode)->first_extents, 0, sizeof(hfs_extent_rec));
218 memset(HFS_I(inode)->cached_extents, 0, sizeof(hfs_extent_rec));
219 }
220 insert_inode_hash(inode);
221 mark_inode_dirty(inode);
222 set_bit(HFS_FLG_MDB_DIRTY, &HFS_SB(sb)->flags);
223 sb->s_dirt = 1;
224
225 return inode;
226}
227
228void hfs_delete_inode(struct inode *inode)
229{
230 struct super_block *sb = inode->i_sb;
231
232 dprint(DBG_INODE, "delete_inode: %lu\n", inode->i_ino);
233 if (S_ISDIR(inode->i_mode)) {
234 HFS_SB(sb)->folder_count--;
235 if (HFS_I(inode)->cat_key.ParID == cpu_to_be32(HFS_ROOT_CNID))
236 HFS_SB(sb)->root_dirs--;
237 set_bit(HFS_FLG_MDB_DIRTY, &HFS_SB(sb)->flags);
238 sb->s_dirt = 1;
239 return;
240 }
241 HFS_SB(sb)->file_count--;
242 if (HFS_I(inode)->cat_key.ParID == cpu_to_be32(HFS_ROOT_CNID))
243 HFS_SB(sb)->root_files--;
244 if (S_ISREG(inode->i_mode)) {
245 if (!inode->i_nlink) {
246 inode->i_size = 0;
247 hfs_file_truncate(inode);
248 }
249 }
250 set_bit(HFS_FLG_MDB_DIRTY, &HFS_SB(sb)->flags);
251 sb->s_dirt = 1;
252}
253
254void hfs_inode_read_fork(struct inode *inode, struct hfs_extent *ext,
255 __be32 __log_size, __be32 phys_size, u32 clump_size)
256{
257 struct super_block *sb = inode->i_sb;
258 u32 log_size = be32_to_cpu(__log_size);
259 u16 count;
260 int i;
261
262 memcpy(HFS_I(inode)->first_extents, ext, sizeof(hfs_extent_rec));
263 for (count = 0, i = 0; i < 3; i++)
264 count += be16_to_cpu(ext[i].count);
265 HFS_I(inode)->first_blocks = count;
266
267 inode->i_size = HFS_I(inode)->phys_size = log_size;
268 HFS_I(inode)->fs_blocks = (log_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
269 inode_set_bytes(inode, HFS_I(inode)->fs_blocks << sb->s_blocksize_bits);
270 HFS_I(inode)->alloc_blocks = be32_to_cpu(phys_size) /
271 HFS_SB(sb)->alloc_blksz;
272 HFS_I(inode)->clump_blocks = clump_size / HFS_SB(sb)->alloc_blksz;
273 if (!HFS_I(inode)->clump_blocks)
274 HFS_I(inode)->clump_blocks = HFS_SB(sb)->clumpablks;
275}
276
277struct hfs_iget_data {
278 struct hfs_cat_key *key;
279 hfs_cat_rec *rec;
280};
281
282static int hfs_test_inode(struct inode *inode, void *data)
283{
284 struct hfs_iget_data *idata = data;
285 hfs_cat_rec *rec;
286
287 rec = idata->rec;
288 switch (rec->type) {
289 case HFS_CDR_DIR:
290 return inode->i_ino == be32_to_cpu(rec->dir.DirID);
291 case HFS_CDR_FIL:
292 return inode->i_ino == be32_to_cpu(rec->file.FlNum);
293 default:
294 BUG();
295 return 1;
296 }
297}
298
299
300
301
302static int hfs_read_inode(struct inode *inode, void *data)
303{
304 struct hfs_iget_data *idata = data;
305 struct hfs_sb_info *hsb = HFS_SB(inode->i_sb);
306 hfs_cat_rec *rec;
307
308 HFS_I(inode)->flags = 0;
309 HFS_I(inode)->rsrc_inode = NULL;
310 mutex_init(&HFS_I(inode)->extents_lock);
311 INIT_LIST_HEAD(&HFS_I(inode)->open_dir_list);
312
313
314 inode->i_uid = hsb->s_uid;
315 inode->i_gid = hsb->s_gid;
316 set_nlink(inode, 1);
317
318 if (idata->key)
319 HFS_I(inode)->cat_key = *idata->key;
320 else
321 HFS_I(inode)->flags |= HFS_FLG_RSRC;
322 HFS_I(inode)->tz_secondswest = sys_tz.tz_minuteswest * 60;
323
324 rec = idata->rec;
325 switch (rec->type) {
326 case HFS_CDR_FIL:
327 if (!HFS_IS_RSRC(inode)) {
328 hfs_inode_read_fork(inode, rec->file.ExtRec, rec->file.LgLen,
329 rec->file.PyLen, be16_to_cpu(rec->file.ClpSize));
330 } else {
331 hfs_inode_read_fork(inode, rec->file.RExtRec, rec->file.RLgLen,
332 rec->file.RPyLen, be16_to_cpu(rec->file.ClpSize));
333 }
334
335 inode->i_ino = be32_to_cpu(rec->file.FlNum);
336 inode->i_mode = S_IRUGO | S_IXUGO;
337 if (!(rec->file.Flags & HFS_FIL_LOCK))
338 inode->i_mode |= S_IWUGO;
339 inode->i_mode &= ~hsb->s_file_umask;
340 inode->i_mode |= S_IFREG;
341 inode->i_ctime = inode->i_atime = inode->i_mtime =
342 hfs_m_to_utime(rec->file.MdDat);
343 inode->i_op = &hfs_file_inode_operations;
344 inode->i_fop = &hfs_file_operations;
345 inode->i_mapping->a_ops = &hfs_aops;
346 break;
347 case HFS_CDR_DIR:
348 inode->i_ino = be32_to_cpu(rec->dir.DirID);
349 inode->i_size = be16_to_cpu(rec->dir.Val) + 2;
350 HFS_I(inode)->fs_blocks = 0;
351 inode->i_mode = S_IFDIR | (S_IRWXUGO & ~hsb->s_dir_umask);
352 inode->i_ctime = inode->i_atime = inode->i_mtime =
353 hfs_m_to_utime(rec->dir.MdDat);
354 inode->i_op = &hfs_dir_inode_operations;
355 inode->i_fop = &hfs_dir_operations;
356 break;
357 default:
358 make_bad_inode(inode);
359 }
360 return 0;
361}
362
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365
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369
370
371
372struct inode *hfs_iget(struct super_block *sb, struct hfs_cat_key *key, hfs_cat_rec *rec)
373{
374 struct hfs_iget_data data = { key, rec };
375 struct inode *inode;
376 u32 cnid;
377
378 switch (rec->type) {
379 case HFS_CDR_DIR:
380 cnid = be32_to_cpu(rec->dir.DirID);
381 break;
382 case HFS_CDR_FIL:
383 cnid = be32_to_cpu(rec->file.FlNum);
384 break;
385 default:
386 return NULL;
387 }
388 inode = iget5_locked(sb, cnid, hfs_test_inode, hfs_read_inode, &data);
389 if (inode && (inode->i_state & I_NEW))
390 unlock_new_inode(inode);
391 return inode;
392}
393
394void hfs_inode_write_fork(struct inode *inode, struct hfs_extent *ext,
395 __be32 *log_size, __be32 *phys_size)
396{
397 memcpy(ext, HFS_I(inode)->first_extents, sizeof(hfs_extent_rec));
398
399 if (log_size)
400 *log_size = cpu_to_be32(inode->i_size);
401 if (phys_size)
402 *phys_size = cpu_to_be32(HFS_I(inode)->alloc_blocks *
403 HFS_SB(inode->i_sb)->alloc_blksz);
404}
405
406int hfs_write_inode(struct inode *inode, struct writeback_control *wbc)
407{
408 struct inode *main_inode = inode;
409 struct hfs_find_data fd;
410 hfs_cat_rec rec;
411
412 dprint(DBG_INODE, "hfs_write_inode: %lu\n", inode->i_ino);
413 hfs_ext_write_extent(inode);
414
415 if (inode->i_ino < HFS_FIRSTUSER_CNID) {
416 switch (inode->i_ino) {
417 case HFS_ROOT_CNID:
418 break;
419 case HFS_EXT_CNID:
420 hfs_btree_write(HFS_SB(inode->i_sb)->ext_tree);
421 return 0;
422 case HFS_CAT_CNID:
423 hfs_btree_write(HFS_SB(inode->i_sb)->cat_tree);
424 return 0;
425 default:
426 BUG();
427 return -EIO;
428 }
429 }
430
431 if (HFS_IS_RSRC(inode))
432 main_inode = HFS_I(inode)->rsrc_inode;
433
434 if (!main_inode->i_nlink)
435 return 0;
436
437 if (hfs_find_init(HFS_SB(main_inode->i_sb)->cat_tree, &fd))
438
439 return -EIO;
440
441 fd.search_key->cat = HFS_I(main_inode)->cat_key;
442 if (hfs_brec_find(&fd))
443
444 goto out;
445
446 if (S_ISDIR(main_inode->i_mode)) {
447 if (fd.entrylength < sizeof(struct hfs_cat_dir))
448 ;
449 hfs_bnode_read(fd.bnode, &rec, fd.entryoffset,
450 sizeof(struct hfs_cat_dir));
451 if (rec.type != HFS_CDR_DIR ||
452 be32_to_cpu(rec.dir.DirID) != inode->i_ino) {
453 }
454
455 rec.dir.MdDat = hfs_u_to_mtime(inode->i_mtime);
456 rec.dir.Val = cpu_to_be16(inode->i_size - 2);
457
458 hfs_bnode_write(fd.bnode, &rec, fd.entryoffset,
459 sizeof(struct hfs_cat_dir));
460 } else if (HFS_IS_RSRC(inode)) {
461 hfs_bnode_read(fd.bnode, &rec, fd.entryoffset,
462 sizeof(struct hfs_cat_file));
463 hfs_inode_write_fork(inode, rec.file.RExtRec,
464 &rec.file.RLgLen, &rec.file.RPyLen);
465 hfs_bnode_write(fd.bnode, &rec, fd.entryoffset,
466 sizeof(struct hfs_cat_file));
467 } else {
468 if (fd.entrylength < sizeof(struct hfs_cat_file))
469 ;
470 hfs_bnode_read(fd.bnode, &rec, fd.entryoffset,
471 sizeof(struct hfs_cat_file));
472 if (rec.type != HFS_CDR_FIL ||
473 be32_to_cpu(rec.file.FlNum) != inode->i_ino) {
474 }
475
476 if (inode->i_mode & S_IWUSR)
477 rec.file.Flags &= ~HFS_FIL_LOCK;
478 else
479 rec.file.Flags |= HFS_FIL_LOCK;
480 hfs_inode_write_fork(inode, rec.file.ExtRec, &rec.file.LgLen, &rec.file.PyLen);
481 rec.file.MdDat = hfs_u_to_mtime(inode->i_mtime);
482
483 hfs_bnode_write(fd.bnode, &rec, fd.entryoffset,
484 sizeof(struct hfs_cat_file));
485 }
486out:
487 hfs_find_exit(&fd);
488 return 0;
489}
490
491static struct dentry *hfs_file_lookup(struct inode *dir, struct dentry *dentry,
492 struct nameidata *nd)
493{
494 struct inode *inode = NULL;
495 hfs_cat_rec rec;
496 struct hfs_find_data fd;
497 int res;
498
499 if (HFS_IS_RSRC(dir) || strcmp(dentry->d_name.name, "rsrc"))
500 goto out;
501
502 inode = HFS_I(dir)->rsrc_inode;
503 if (inode)
504 goto out;
505
506 inode = new_inode(dir->i_sb);
507 if (!inode)
508 return ERR_PTR(-ENOMEM);
509
510 hfs_find_init(HFS_SB(dir->i_sb)->cat_tree, &fd);
511 fd.search_key->cat = HFS_I(dir)->cat_key;
512 res = hfs_brec_read(&fd, &rec, sizeof(rec));
513 if (!res) {
514 struct hfs_iget_data idata = { NULL, &rec };
515 hfs_read_inode(inode, &idata);
516 }
517 hfs_find_exit(&fd);
518 if (res) {
519 iput(inode);
520 return ERR_PTR(res);
521 }
522 HFS_I(inode)->rsrc_inode = dir;
523 HFS_I(dir)->rsrc_inode = inode;
524 igrab(dir);
525 hlist_add_fake(&inode->i_hash);
526 mark_inode_dirty(inode);
527out:
528 d_add(dentry, inode);
529 return NULL;
530}
531
532void hfs_evict_inode(struct inode *inode)
533{
534 truncate_inode_pages(&inode->i_data, 0);
535 end_writeback(inode);
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
542static 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
550static int hfs_file_release(struct inode *inode, struct file *file)
551{
552
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
560
561
562
563 mutex_unlock(&inode->i_mutex);
564 }
565 return 0;
566}
567
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584
585int 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);
592 if (error)
593 return error;
594
595
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
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 inode_dio_wait(inode);
619
620 error = vmtruncate(inode, attr->ia_size);
621 if (error)
622 return error;
623 }
624
625 setattr_copy(inode, attr);
626 mark_inode_dirty(inode);
627 return 0;
628}
629
630static int hfs_file_fsync(struct file *filp, loff_t start, loff_t end,
631 int datasync)
632{
633 struct inode *inode = filp->f_mapping->host;
634 struct super_block * sb;
635 int ret, err;
636
637 ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
638 if (ret)
639 return ret;
640 mutex_lock(&inode->i_mutex);
641
642
643 ret = write_inode_now(inode, 0);
644
645
646 sb = inode->i_sb;
647 if (sb->s_dirt) {
648 lock_super(sb);
649 sb->s_dirt = 0;
650 if (!(sb->s_flags & MS_RDONLY))
651 hfs_mdb_commit(sb);
652 unlock_super(sb);
653 }
654
655 err = sync_blockdev(sb->s_bdev);
656 if (!ret)
657 ret = err;
658 mutex_unlock(&inode->i_mutex);
659 return ret;
660}
661
662static const struct file_operations hfs_file_operations = {
663 .llseek = generic_file_llseek,
664 .read = do_sync_read,
665 .aio_read = generic_file_aio_read,
666 .write = do_sync_write,
667 .aio_write = generic_file_aio_write,
668 .mmap = generic_file_mmap,
669 .splice_read = generic_file_splice_read,
670 .fsync = hfs_file_fsync,
671 .open = hfs_file_open,
672 .release = hfs_file_release,
673};
674
675static const struct inode_operations hfs_file_inode_operations = {
676 .lookup = hfs_file_lookup,
677 .truncate = hfs_file_truncate,
678 .setattr = hfs_inode_setattr,
679 .setxattr = hfs_setxattr,
680 .getxattr = hfs_getxattr,
681 .listxattr = hfs_listxattr,
682};
683
