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1/*
2 * linux/fs/hpfs/namei.c
3 *
4 * Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999
5 *
6 * adding & removing files & directories
7 */
8#include <linux/sched.h>
9#include "hpfs_fn.h"
10
11static int hpfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
12{
13 const unsigned char *name = dentry->d_name.name;
14 unsigned len = dentry->d_name.len;
15 struct quad_buffer_head qbh0;
16 struct buffer_head *bh;
17 struct hpfs_dirent *de;
18 struct fnode *fnode;
19 struct dnode *dnode;
20 struct inode *result;
21 fnode_secno fno;
22 dnode_secno dno;
23 int r;
24 struct hpfs_dirent dee;
25 int err;
26 if ((err = hpfs_chk_name(name, &len))) return err==-ENOENT ? -EINVAL : err;
27 hpfs_lock(dir->i_sb);
28 err = -ENOSPC;
29 fnode = hpfs_alloc_fnode(dir->i_sb, hpfs_i(dir)->i_dno, &fno, &bh);
30 if (!fnode)
31 goto bail;
32 dnode = hpfs_alloc_dnode(dir->i_sb, fno, &dno, &qbh0);
33 if (!dnode)
34 goto bail1;
35 memset(&dee, 0, sizeof dee);
36 dee.directory = 1;
37 if (!(mode & 0222)) dee.read_only = 1;
38 /*dee.archive = 0;*/
39 dee.hidden = name[0] == '.';
40 dee.fnode = cpu_to_le32(fno);
41 dee.creation_date = dee.write_date = dee.read_date = cpu_to_le32(gmt_to_local(dir->i_sb, get_seconds()));
42 result = new_inode(dir->i_sb);
43 if (!result)
44 goto bail2;
45 hpfs_init_inode(result);
46 result->i_ino = fno;
47 hpfs_i(result)->i_parent_dir = dir->i_ino;
48 hpfs_i(result)->i_dno = dno;
49 result->i_ctime.tv_sec = result->i_mtime.tv_sec = result->i_atime.tv_sec = local_to_gmt(dir->i_sb, le32_to_cpu(dee.creation_date));
50 result->i_ctime.tv_nsec = 0;
51 result->i_mtime.tv_nsec = 0;
52 result->i_atime.tv_nsec = 0;
53 hpfs_i(result)->i_ea_size = 0;
54 result->i_mode |= S_IFDIR;
55 result->i_op = &hpfs_dir_iops;
56 result->i_fop = &hpfs_dir_ops;
57 result->i_blocks = 4;
58 result->i_size = 2048;
59 result->i_nlink = 2;
60 if (dee.read_only)
61 result->i_mode &= ~0222;
62
63 r = hpfs_add_dirent(dir, name, len, &dee);
64 if (r == 1)
65 goto bail3;
66 if (r == -1) {
67 err = -EEXIST;
68 goto bail3;
69 }
70 fnode->len = len;
71 memcpy(fnode->name, name, len > 15 ? 15 : len);
72 fnode->up = cpu_to_le32(dir->i_ino);
73 fnode->dirflag = 1;
74 fnode->btree.n_free_nodes = 7;
75 fnode->btree.n_used_nodes = 1;
76 fnode->btree.first_free = cpu_to_le16(0x14);
77 fnode->u.external[0].disk_secno = cpu_to_le32(dno);
78 fnode->u.external[0].file_secno = cpu_to_le32(-1);
79 dnode->root_dnode = 1;
80 dnode->up = cpu_to_le32(fno);
81 de = hpfs_add_de(dir->i_sb, dnode, "\001\001", 2, 0);
82 de->creation_date = de->write_date = de->read_date = cpu_to_le32(gmt_to_local(dir->i_sb, get_seconds()));
83 if (!(mode & 0222)) de->read_only = 1;
84 de->first = de->directory = 1;
85 /*de->hidden = de->system = 0;*/
86 de->fnode = cpu_to_le32(fno);
87 mark_buffer_dirty(bh);
88 brelse(bh);
89 hpfs_mark_4buffers_dirty(&qbh0);
90 hpfs_brelse4(&qbh0);
91 inc_nlink(dir);
92 insert_inode_hash(result);
93
94 if (result->i_uid != current_fsuid() ||
95 result->i_gid != current_fsgid() ||
96 result->i_mode != (mode | S_IFDIR)) {
97 result->i_uid = current_fsuid();
98 result->i_gid = current_fsgid();
99 result->i_mode = mode | S_IFDIR;
100 hpfs_write_inode_nolock(result);
101 }
102 d_instantiate(dentry, result);
103 hpfs_unlock(dir->i_sb);
104 return 0;
105bail3:
106 iput(result);
107bail2:
108 hpfs_brelse4(&qbh0);
109 hpfs_free_dnode(dir->i_sb, dno);
110bail1:
111 brelse(bh);
112 hpfs_free_sectors(dir->i_sb, fno, 1);
113bail:
114 hpfs_unlock(dir->i_sb);
115 return err;
116}
117
118static int hpfs_create(struct inode *dir, struct dentry *dentry, int mode, struct nameidata *nd)
119{
120 const unsigned char *name = dentry->d_name.name;
121 unsigned len = dentry->d_name.len;
122 struct inode *result = NULL;
123 struct buffer_head *bh;
124 struct fnode *fnode;
125 fnode_secno fno;
126 int r;
127 struct hpfs_dirent dee;
128 int err;
129 if ((err = hpfs_chk_name(name, &len)))
130 return err==-ENOENT ? -EINVAL : err;
131 hpfs_lock(dir->i_sb);
132 err = -ENOSPC;
133 fnode = hpfs_alloc_fnode(dir->i_sb, hpfs_i(dir)->i_dno, &fno, &bh);
134 if (!fnode)
135 goto bail;
136 memset(&dee, 0, sizeof dee);
137 if (!(mode & 0222)) dee.read_only = 1;
138 dee.archive = 1;
139 dee.hidden = name[0] == '.';
140 dee.fnode = cpu_to_le32(fno);
141 dee.creation_date = dee.write_date = dee.read_date = cpu_to_le32(gmt_to_local(dir->i_sb, get_seconds()));
142
143 result = new_inode(dir->i_sb);
144 if (!result)
145 goto bail1;
146
147 hpfs_init_inode(result);
148 result->i_ino = fno;
149 result->i_mode |= S_IFREG;
150 result->i_mode &= ~0111;
151 result->i_op = &hpfs_file_iops;
152 result->i_fop = &hpfs_file_ops;
153 result->i_nlink = 1;
154 hpfs_i(result)->i_parent_dir = dir->i_ino;
155 result->i_ctime.tv_sec = result->i_mtime.tv_sec = result->i_atime.tv_sec = local_to_gmt(dir->i_sb, le32_to_cpu(dee.creation_date));
156 result->i_ctime.tv_nsec = 0;
157 result->i_mtime.tv_nsec = 0;
158 result->i_atime.tv_nsec = 0;
159 hpfs_i(result)->i_ea_size = 0;
160 if (dee.read_only)
161 result->i_mode &= ~0222;
162 result->i_blocks = 1;
163 result->i_size = 0;
164 result->i_data.a_ops = &hpfs_aops;
165 hpfs_i(result)->mmu_private = 0;
166
167 r = hpfs_add_dirent(dir, name, len, &dee);
168 if (r == 1)
169 goto bail2;
170 if (r == -1) {
171 err = -EEXIST;
172 goto bail2;
173 }
174 fnode->len = len;
175 memcpy(fnode->name, name, len > 15 ? 15 : len);
176 fnode->up = cpu_to_le32(dir->i_ino);
177 mark_buffer_dirty(bh);
178 brelse(bh);
179
180 insert_inode_hash(result);
181
182 if (result->i_uid != current_fsuid() ||
183 result->i_gid != current_fsgid() ||
184 result->i_mode != (mode | S_IFREG)) {
185 result->i_uid = current_fsuid();
186 result->i_gid = current_fsgid();
187 result->i_mode = mode | S_IFREG;
188 hpfs_write_inode_nolock(result);
189 }
190 d_instantiate(dentry, result);
191 hpfs_unlock(dir->i_sb);
192 return 0;
193
194bail2:
195 iput(result);
196bail1:
197 brelse(bh);
198 hpfs_free_sectors(dir->i_sb, fno, 1);
199bail:
200 hpfs_unlock(dir->i_sb);
201 return err;
202}
203
204static int hpfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev)
205{
206 const unsigned char *name = dentry->d_name.name;
207 unsigned len = dentry->d_name.len;
208 struct buffer_head *bh;
209 struct fnode *fnode;
210 fnode_secno fno;
211 int r;
212 struct hpfs_dirent dee;
213 struct inode *result = NULL;
214 int err;
215 if ((err = hpfs_chk_name(name, &len))) return err==-ENOENT ? -EINVAL : err;
216 if (hpfs_sb(dir->i_sb)->sb_eas < 2) return -EPERM;
217 if (!new_valid_dev(rdev))
218 return -EINVAL;
219 hpfs_lock(dir->i_sb);
220 err = -ENOSPC;
221 fnode = hpfs_alloc_fnode(dir->i_sb, hpfs_i(dir)->i_dno, &fno, &bh);
222 if (!fnode)
223 goto bail;
224 memset(&dee, 0, sizeof dee);
225 if (!(mode & 0222)) dee.read_only = 1;
226 dee.archive = 1;
227 dee.hidden = name[0] == '.';
228 dee.fnode = cpu_to_le32(fno);
229 dee.creation_date = dee.write_date = dee.read_date = cpu_to_le32(gmt_to_local(dir->i_sb, get_seconds()));
230
231 result = new_inode(dir->i_sb);
232 if (!result)
233 goto bail1;
234
235 hpfs_init_inode(result);
236 result->i_ino = fno;
237 hpfs_i(result)->i_parent_dir = dir->i_ino;
238 result->i_ctime.tv_sec = result->i_mtime.tv_sec = result->i_atime.tv_sec = local_to_gmt(dir->i_sb, le32_to_cpu(dee.creation_date));
239 result->i_ctime.tv_nsec = 0;
240 result->i_mtime.tv_nsec = 0;
241 result->i_atime.tv_nsec = 0;
242 hpfs_i(result)->i_ea_size = 0;
243 result->i_uid = current_fsuid();
244 result->i_gid = current_fsgid();
245 result->i_nlink = 1;
246 result->i_size = 0;
247 result->i_blocks = 1;
248 init_special_inode(result, mode, rdev);
249
250 r = hpfs_add_dirent(dir, name, len, &dee);
251 if (r == 1)
252 goto bail2;
253 if (r == -1) {
254 err = -EEXIST;
255 goto bail2;
256 }
257 fnode->len = len;
258 memcpy(fnode->name, name, len > 15 ? 15 : len);
259 fnode->up = cpu_to_le32(dir->i_ino);
260 mark_buffer_dirty(bh);
261
262 insert_inode_hash(result);
263
264 hpfs_write_inode_nolock(result);
265 d_instantiate(dentry, result);
266 brelse(bh);
267 hpfs_unlock(dir->i_sb);
268 return 0;
269bail2:
270 iput(result);
271bail1:
272 brelse(bh);
273 hpfs_free_sectors(dir->i_sb, fno, 1);
274bail:
275 hpfs_unlock(dir->i_sb);
276 return err;
277}
278
279static int hpfs_symlink(struct inode *dir, struct dentry *dentry, const char *symlink)
280{
281 const unsigned char *name = dentry->d_name.name;
282 unsigned len = dentry->d_name.len;
283 struct buffer_head *bh;
284 struct fnode *fnode;
285 fnode_secno fno;
286 int r;
287 struct hpfs_dirent dee;
288 struct inode *result;
289 int err;
290 if ((err = hpfs_chk_name(name, &len))) return err==-ENOENT ? -EINVAL : err;
291 hpfs_lock(dir->i_sb);
292 if (hpfs_sb(dir->i_sb)->sb_eas < 2) {
293 hpfs_unlock(dir->i_sb);
294 return -EPERM;
295 }
296 err = -ENOSPC;
297 fnode = hpfs_alloc_fnode(dir->i_sb, hpfs_i(dir)->i_dno, &fno, &bh);
298 if (!fnode)
299 goto bail;
300 memset(&dee, 0, sizeof dee);
301 dee.archive = 1;
302 dee.hidden = name[0] == '.';
303 dee.fnode = cpu_to_le32(fno);
304 dee.creation_date = dee.write_date = dee.read_date = cpu_to_le32(gmt_to_local(dir->i_sb, get_seconds()));
305
306 result = new_inode(dir->i_sb);
307 if (!result)
308 goto bail1;
309 result->i_ino = fno;
310 hpfs_init_inode(result);
311 hpfs_i(result)->i_parent_dir = dir->i_ino;
312 result->i_ctime.tv_sec = result->i_mtime.tv_sec = result->i_atime.tv_sec = local_to_gmt(dir->i_sb, le32_to_cpu(dee.creation_date));
313 result->i_ctime.tv_nsec = 0;
314 result->i_mtime.tv_nsec = 0;
315 result->i_atime.tv_nsec = 0;
316 hpfs_i(result)->i_ea_size = 0;
317 result->i_mode = S_IFLNK | 0777;
318 result->i_uid = current_fsuid();
319 result->i_gid = current_fsgid();
320 result->i_blocks = 1;
321 result->i_nlink = 1;
322 result->i_size = strlen(symlink);
323 result->i_op = &page_symlink_inode_operations;
324 result->i_data.a_ops = &hpfs_symlink_aops;
325
326 r = hpfs_add_dirent(dir, name, len, &dee);
327 if (r == 1)
328 goto bail2;
329 if (r == -1) {
330 err = -EEXIST;
331 goto bail2;
332 }
333 fnode->len = len;
334 memcpy(fnode->name, name, len > 15 ? 15 : len);
335 fnode->up = cpu_to_le32(dir->i_ino);
336 hpfs_set_ea(result, fnode, "SYMLINK", symlink, strlen(symlink));
337 mark_buffer_dirty(bh);
338 brelse(bh);
339
340 insert_inode_hash(result);
341
342 hpfs_write_inode_nolock(result);
343 d_instantiate(dentry, result);
344 hpfs_unlock(dir->i_sb);
345 return 0;
346bail2:
347 iput(result);
348bail1:
349 brelse(bh);
350 hpfs_free_sectors(dir->i_sb, fno, 1);
351bail:
352 hpfs_unlock(dir->i_sb);
353 return err;
354}
355
356static int hpfs_unlink(struct inode *dir, struct dentry *dentry)
357{
358 const unsigned char *name = dentry->d_name.name;
359 unsigned len = dentry->d_name.len;
360 struct quad_buffer_head qbh;
361 struct hpfs_dirent *de;
362 struct inode *inode = dentry->d_inode;
363 dnode_secno dno;
364 int r;
365 int rep = 0;
366 int err;
367
368 hpfs_lock(dir->i_sb);
369 hpfs_adjust_length(name, &len);
370again:
371 err = -ENOENT;
372 de = map_dirent(dir, hpfs_i(dir)->i_dno, name, len, &dno, &qbh);
373 if (!de)
374 goto out;
375
376 err = -EPERM;
377 if (de->first)
378 goto out1;
379
380 err = -EISDIR;
381 if (de->directory)
382 goto out1;
383
384 r = hpfs_remove_dirent(dir, dno, de, &qbh, 1);
385 switch (r) {
386 case 1:
387 hpfs_error(dir->i_sb, "there was error when removing dirent");
388 err = -EFSERROR;
389 break;
390 case 2: /* no space for deleting, try to truncate file */
391
392 err = -ENOSPC;
393 if (rep++)
394 break;
395
396 dentry_unhash(dentry);
397 if (!d_unhashed(dentry)) {
398 hpfs_unlock(dir->i_sb);
399 return -ENOSPC;
400 }
401 if (generic_permission(inode, MAY_WRITE) ||
402 !S_ISREG(inode->i_mode) ||
403 get_write_access(inode)) {
404 d_rehash(dentry);
405 } else {
406 struct iattr newattrs;
407 /*printk("HPFS: truncating file before delete.\n");*/
408 newattrs.ia_size = 0;
409 newattrs.ia_valid = ATTR_SIZE | ATTR_CTIME;
410 err = notify_change(dentry, &newattrs);
411 put_write_access(inode);
412 if (!err)
413 goto again;
414 }
415 hpfs_unlock(dir->i_sb);
416 return -ENOSPC;
417 default:
418 drop_nlink(inode);
419 err = 0;
420 }
421 goto out;
422
423out1:
424 hpfs_brelse4(&qbh);
425out:
426 hpfs_unlock(dir->i_sb);
427 return err;
428}
429
430static int hpfs_rmdir(struct inode *dir, struct dentry *dentry)
431{
432 const unsigned char *name = dentry->d_name.name;
433 unsigned len = dentry->d_name.len;
434 struct quad_buffer_head qbh;
435 struct hpfs_dirent *de;
436 struct inode *inode = dentry->d_inode;
437 dnode_secno dno;
438 int n_items = 0;
439 int err;
440 int r;
441
442 hpfs_adjust_length(name, &len);
443 hpfs_lock(dir->i_sb);
444 err = -ENOENT;
445 de = map_dirent(dir, hpfs_i(dir)->i_dno, name, len, &dno, &qbh);
446 if (!de)
447 goto out;
448
449 err = -EPERM;
450 if (de->first)
451 goto out1;
452
453 err = -ENOTDIR;
454 if (!de->directory)
455 goto out1;
456
457 hpfs_count_dnodes(dir->i_sb, hpfs_i(inode)->i_dno, NULL, NULL, &n_items);
458 err = -ENOTEMPTY;
459 if (n_items)
460 goto out1;
461
462 r = hpfs_remove_dirent(dir, dno, de, &qbh, 1);
463 switch (r) {
464 case 1:
465 hpfs_error(dir->i_sb, "there was error when removing dirent");
466 err = -EFSERROR;
467 break;
468 case 2:
469 err = -ENOSPC;
470 break;
471 default:
472 drop_nlink(dir);
473 clear_nlink(inode);
474 err = 0;
475 }
476 goto out;
477out1:
478 hpfs_brelse4(&qbh);
479out:
480 hpfs_unlock(dir->i_sb);
481 return err;
482}
483
484static int hpfs_symlink_readpage(struct file *file, struct page *page)
485{
486 char *link = kmap(page);
487 struct inode *i = page->mapping->host;
488 struct fnode *fnode;
489 struct buffer_head *bh;
490 int err;
491
492 err = -EIO;
493 hpfs_lock(i->i_sb);
494 if (!(fnode = hpfs_map_fnode(i->i_sb, i->i_ino, &bh)))
495 goto fail;
496 err = hpfs_read_ea(i->i_sb, fnode, "SYMLINK", link, PAGE_SIZE);
497 brelse(bh);
498 if (err)
499 goto fail;
500 hpfs_unlock(i->i_sb);
501 SetPageUptodate(page);
502 kunmap(page);
503 unlock_page(page);
504 return 0;
505
506fail:
507 hpfs_unlock(i->i_sb);
508 SetPageError(page);
509 kunmap(page);
510 unlock_page(page);
511 return err;
512}
513
514const struct address_space_operations hpfs_symlink_aops = {
515 .readpage = hpfs_symlink_readpage
516};
517
518static int hpfs_rename(struct inode *old_dir, struct dentry *old_dentry,
519 struct inode *new_dir, struct dentry *new_dentry)
520{
521 const unsigned char *old_name = old_dentry->d_name.name;
522 unsigned old_len = old_dentry->d_name.len;
523 const unsigned char *new_name = new_dentry->d_name.name;
524 unsigned new_len = new_dentry->d_name.len;
525 struct inode *i = old_dentry->d_inode;
526 struct inode *new_inode = new_dentry->d_inode;
527 struct quad_buffer_head qbh, qbh1;
528 struct hpfs_dirent *dep, *nde;
529 struct hpfs_dirent de;
530 dnode_secno dno;
531 int r;
532 struct buffer_head *bh;
533 struct fnode *fnode;
534 int err;
535
536 if ((err = hpfs_chk_name(new_name, &new_len))) return err;
537 err = 0;
538 hpfs_adjust_length(old_name, &old_len);
539
540 hpfs_lock(i->i_sb);
541 /* order doesn't matter, due to VFS exclusion */
542
543 /* Erm? Moving over the empty non-busy directory is perfectly legal */
544 if (new_inode && S_ISDIR(new_inode->i_mode)) {
545 err = -EINVAL;
546 goto end1;
547 }
548
549 if (!(dep = map_dirent(old_dir, hpfs_i(old_dir)->i_dno, old_name, old_len, &dno, &qbh))) {
550 hpfs_error(i->i_sb, "lookup succeeded but map dirent failed");
551 err = -ENOENT;
552 goto end1;
553 }
554 copy_de(&de, dep);
555 de.hidden = new_name[0] == '.';
556
557 if (new_inode) {
558 int r;
559 if ((r = hpfs_remove_dirent(old_dir, dno, dep, &qbh, 1)) != 2) {
560 if ((nde = map_dirent(new_dir, hpfs_i(new_dir)->i_dno, new_name, new_len, NULL, &qbh1))) {
561 clear_nlink(new_inode);
562 copy_de(nde, &de);
563 memcpy(nde->name, new_name, new_len);
564 hpfs_mark_4buffers_dirty(&qbh1);
565 hpfs_brelse4(&qbh1);
566 goto end;
567 }
568 hpfs_error(new_dir->i_sb, "hpfs_rename: could not find dirent");
569 err = -EFSERROR;
570 goto end1;
571 }
572 err = r == 2 ? -ENOSPC : r == 1 ? -EFSERROR : 0;
573 goto end1;
574 }
575
576 if (new_dir == old_dir) hpfs_brelse4(&qbh);
577
578 if ((r = hpfs_add_dirent(new_dir, new_name, new_len, &de))) {
579 if (r == -1) hpfs_error(new_dir->i_sb, "hpfs_rename: dirent already exists!");
580 err = r == 1 ? -ENOSPC : -EFSERROR;
581 if (new_dir != old_dir) hpfs_brelse4(&qbh);
582 goto end1;
583 }
584
585 if (new_dir == old_dir)
586 if (!(dep = map_dirent(old_dir, hpfs_i(old_dir)->i_dno, old_name, old_len, &dno, &qbh))) {
587 hpfs_error(i->i_sb, "lookup succeeded but map dirent failed at #2");
588 err = -ENOENT;
589 goto end1;
590 }
591
592 if ((r = hpfs_remove_dirent(old_dir, dno, dep, &qbh, 0))) {
593 hpfs_error(i->i_sb, "hpfs_rename: could not remove dirent");
594 err = r == 2 ? -ENOSPC : -EFSERROR;
595 goto end1;
596 }
597
598 end:
599 hpfs_i(i)->i_parent_dir = new_dir->i_ino;
600 if (S_ISDIR(i->i_mode)) {
601 inc_nlink(new_dir);
602 drop_nlink(old_dir);
603 }
604 if ((fnode = hpfs_map_fnode(i->i_sb, i->i_ino, &bh))) {
605 fnode->up = cpu_to_le32(new_dir->i_ino);
606 fnode->len = new_len;
607 memcpy(fnode->name, new_name, new_len>15?15:new_len);
608 if (new_len < 15) memset(&fnode->name[new_len], 0, 15 - new_len);
609 mark_buffer_dirty(bh);
610 brelse(bh);
611 }
612end1:
613 hpfs_unlock(i->i_sb);
614 return err;
615}
616
617const struct inode_operations hpfs_dir_iops =
618{
619 .create = hpfs_create,
620 .lookup = hpfs_lookup,
621 .unlink = hpfs_unlink,
622 .symlink = hpfs_symlink,
623 .mkdir = hpfs_mkdir,
624 .rmdir = hpfs_rmdir,
625 .mknod = hpfs_mknod,
626 .rename = hpfs_rename,
627 .setattr = hpfs_setattr,
628};
1/*
2 * linux/fs/hpfs/namei.c
3 *
4 * Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999
5 *
6 * adding & removing files & directories
7 */
8#include <linux/sched.h>
9#include "hpfs_fn.h"
10
11static void hpfs_update_directory_times(struct inode *dir)
12{
13 time_t t = get_seconds();
14 if (t == dir->i_mtime.tv_sec &&
15 t == dir->i_ctime.tv_sec)
16 return;
17 dir->i_mtime.tv_sec = dir->i_ctime.tv_sec = t;
18 dir->i_mtime.tv_nsec = dir->i_ctime.tv_nsec = 0;
19 hpfs_write_inode_nolock(dir);
20}
21
22static int hpfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
23{
24 const unsigned char *name = dentry->d_name.name;
25 unsigned len = dentry->d_name.len;
26 struct quad_buffer_head qbh0;
27 struct buffer_head *bh;
28 struct hpfs_dirent *de;
29 struct fnode *fnode;
30 struct dnode *dnode;
31 struct inode *result;
32 fnode_secno fno;
33 dnode_secno dno;
34 int r;
35 struct hpfs_dirent dee;
36 int err;
37 if ((err = hpfs_chk_name(name, &len))) return err==-ENOENT ? -EINVAL : err;
38 hpfs_lock(dir->i_sb);
39 err = -ENOSPC;
40 fnode = hpfs_alloc_fnode(dir->i_sb, hpfs_i(dir)->i_dno, &fno, &bh);
41 if (!fnode)
42 goto bail;
43 dnode = hpfs_alloc_dnode(dir->i_sb, fno, &dno, &qbh0);
44 if (!dnode)
45 goto bail1;
46 memset(&dee, 0, sizeof dee);
47 dee.directory = 1;
48 if (!(mode & 0222)) dee.read_only = 1;
49 /*dee.archive = 0;*/
50 dee.hidden = name[0] == '.';
51 dee.fnode = cpu_to_le32(fno);
52 dee.creation_date = dee.write_date = dee.read_date = cpu_to_le32(gmt_to_local(dir->i_sb, get_seconds()));
53 result = new_inode(dir->i_sb);
54 if (!result)
55 goto bail2;
56 hpfs_init_inode(result);
57 result->i_ino = fno;
58 hpfs_i(result)->i_parent_dir = dir->i_ino;
59 hpfs_i(result)->i_dno = dno;
60 result->i_ctime.tv_sec = result->i_mtime.tv_sec = result->i_atime.tv_sec = local_to_gmt(dir->i_sb, le32_to_cpu(dee.creation_date));
61 result->i_ctime.tv_nsec = 0;
62 result->i_mtime.tv_nsec = 0;
63 result->i_atime.tv_nsec = 0;
64 hpfs_i(result)->i_ea_size = 0;
65 result->i_mode |= S_IFDIR;
66 result->i_op = &hpfs_dir_iops;
67 result->i_fop = &hpfs_dir_ops;
68 result->i_blocks = 4;
69 result->i_size = 2048;
70 set_nlink(result, 2);
71 if (dee.read_only)
72 result->i_mode &= ~0222;
73
74 r = hpfs_add_dirent(dir, name, len, &dee);
75 if (r == 1)
76 goto bail3;
77 if (r == -1) {
78 err = -EEXIST;
79 goto bail3;
80 }
81 fnode->len = len;
82 memcpy(fnode->name, name, len > 15 ? 15 : len);
83 fnode->up = cpu_to_le32(dir->i_ino);
84 fnode->flags |= FNODE_dir;
85 fnode->btree.n_free_nodes = 7;
86 fnode->btree.n_used_nodes = 1;
87 fnode->btree.first_free = cpu_to_le16(0x14);
88 fnode->u.external[0].disk_secno = cpu_to_le32(dno);
89 fnode->u.external[0].file_secno = cpu_to_le32(-1);
90 dnode->root_dnode = 1;
91 dnode->up = cpu_to_le32(fno);
92 de = hpfs_add_de(dir->i_sb, dnode, "\001\001", 2, 0);
93 de->creation_date = de->write_date = de->read_date = cpu_to_le32(gmt_to_local(dir->i_sb, get_seconds()));
94 if (!(mode & 0222)) de->read_only = 1;
95 de->first = de->directory = 1;
96 /*de->hidden = de->system = 0;*/
97 de->fnode = cpu_to_le32(fno);
98 mark_buffer_dirty(bh);
99 brelse(bh);
100 hpfs_mark_4buffers_dirty(&qbh0);
101 hpfs_brelse4(&qbh0);
102 inc_nlink(dir);
103 insert_inode_hash(result);
104
105 if (!uid_eq(result->i_uid, current_fsuid()) ||
106 !gid_eq(result->i_gid, current_fsgid()) ||
107 result->i_mode != (mode | S_IFDIR)) {
108 result->i_uid = current_fsuid();
109 result->i_gid = current_fsgid();
110 result->i_mode = mode | S_IFDIR;
111 hpfs_write_inode_nolock(result);
112 }
113 hpfs_update_directory_times(dir);
114 d_instantiate(dentry, result);
115 hpfs_unlock(dir->i_sb);
116 return 0;
117bail3:
118 iput(result);
119bail2:
120 hpfs_brelse4(&qbh0);
121 hpfs_free_dnode(dir->i_sb, dno);
122bail1:
123 brelse(bh);
124 hpfs_free_sectors(dir->i_sb, fno, 1);
125bail:
126 hpfs_unlock(dir->i_sb);
127 return err;
128}
129
130static int hpfs_create(struct inode *dir, struct dentry *dentry, umode_t mode, bool excl)
131{
132 const unsigned char *name = dentry->d_name.name;
133 unsigned len = dentry->d_name.len;
134 struct inode *result = NULL;
135 struct buffer_head *bh;
136 struct fnode *fnode;
137 fnode_secno fno;
138 int r;
139 struct hpfs_dirent dee;
140 int err;
141 if ((err = hpfs_chk_name(name, &len)))
142 return err==-ENOENT ? -EINVAL : err;
143 hpfs_lock(dir->i_sb);
144 err = -ENOSPC;
145 fnode = hpfs_alloc_fnode(dir->i_sb, hpfs_i(dir)->i_dno, &fno, &bh);
146 if (!fnode)
147 goto bail;
148 memset(&dee, 0, sizeof dee);
149 if (!(mode & 0222)) dee.read_only = 1;
150 dee.archive = 1;
151 dee.hidden = name[0] == '.';
152 dee.fnode = cpu_to_le32(fno);
153 dee.creation_date = dee.write_date = dee.read_date = cpu_to_le32(gmt_to_local(dir->i_sb, get_seconds()));
154
155 result = new_inode(dir->i_sb);
156 if (!result)
157 goto bail1;
158
159 hpfs_init_inode(result);
160 result->i_ino = fno;
161 result->i_mode |= S_IFREG;
162 result->i_mode &= ~0111;
163 result->i_op = &hpfs_file_iops;
164 result->i_fop = &hpfs_file_ops;
165 set_nlink(result, 1);
166 hpfs_i(result)->i_parent_dir = dir->i_ino;
167 result->i_ctime.tv_sec = result->i_mtime.tv_sec = result->i_atime.tv_sec = local_to_gmt(dir->i_sb, le32_to_cpu(dee.creation_date));
168 result->i_ctime.tv_nsec = 0;
169 result->i_mtime.tv_nsec = 0;
170 result->i_atime.tv_nsec = 0;
171 hpfs_i(result)->i_ea_size = 0;
172 if (dee.read_only)
173 result->i_mode &= ~0222;
174 result->i_blocks = 1;
175 result->i_size = 0;
176 result->i_data.a_ops = &hpfs_aops;
177 hpfs_i(result)->mmu_private = 0;
178
179 r = hpfs_add_dirent(dir, name, len, &dee);
180 if (r == 1)
181 goto bail2;
182 if (r == -1) {
183 err = -EEXIST;
184 goto bail2;
185 }
186 fnode->len = len;
187 memcpy(fnode->name, name, len > 15 ? 15 : len);
188 fnode->up = cpu_to_le32(dir->i_ino);
189 mark_buffer_dirty(bh);
190 brelse(bh);
191
192 insert_inode_hash(result);
193
194 if (!uid_eq(result->i_uid, current_fsuid()) ||
195 !gid_eq(result->i_gid, current_fsgid()) ||
196 result->i_mode != (mode | S_IFREG)) {
197 result->i_uid = current_fsuid();
198 result->i_gid = current_fsgid();
199 result->i_mode = mode | S_IFREG;
200 hpfs_write_inode_nolock(result);
201 }
202 hpfs_update_directory_times(dir);
203 d_instantiate(dentry, result);
204 hpfs_unlock(dir->i_sb);
205 return 0;
206
207bail2:
208 iput(result);
209bail1:
210 brelse(bh);
211 hpfs_free_sectors(dir->i_sb, fno, 1);
212bail:
213 hpfs_unlock(dir->i_sb);
214 return err;
215}
216
217static int hpfs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t rdev)
218{
219 const unsigned char *name = dentry->d_name.name;
220 unsigned len = dentry->d_name.len;
221 struct buffer_head *bh;
222 struct fnode *fnode;
223 fnode_secno fno;
224 int r;
225 struct hpfs_dirent dee;
226 struct inode *result = NULL;
227 int err;
228 if ((err = hpfs_chk_name(name, &len))) return err==-ENOENT ? -EINVAL : err;
229 if (hpfs_sb(dir->i_sb)->sb_eas < 2) return -EPERM;
230 hpfs_lock(dir->i_sb);
231 err = -ENOSPC;
232 fnode = hpfs_alloc_fnode(dir->i_sb, hpfs_i(dir)->i_dno, &fno, &bh);
233 if (!fnode)
234 goto bail;
235 memset(&dee, 0, sizeof dee);
236 if (!(mode & 0222)) dee.read_only = 1;
237 dee.archive = 1;
238 dee.hidden = name[0] == '.';
239 dee.fnode = cpu_to_le32(fno);
240 dee.creation_date = dee.write_date = dee.read_date = cpu_to_le32(gmt_to_local(dir->i_sb, get_seconds()));
241
242 result = new_inode(dir->i_sb);
243 if (!result)
244 goto bail1;
245
246 hpfs_init_inode(result);
247 result->i_ino = fno;
248 hpfs_i(result)->i_parent_dir = dir->i_ino;
249 result->i_ctime.tv_sec = result->i_mtime.tv_sec = result->i_atime.tv_sec = local_to_gmt(dir->i_sb, le32_to_cpu(dee.creation_date));
250 result->i_ctime.tv_nsec = 0;
251 result->i_mtime.tv_nsec = 0;
252 result->i_atime.tv_nsec = 0;
253 hpfs_i(result)->i_ea_size = 0;
254 result->i_uid = current_fsuid();
255 result->i_gid = current_fsgid();
256 set_nlink(result, 1);
257 result->i_size = 0;
258 result->i_blocks = 1;
259 init_special_inode(result, mode, rdev);
260
261 r = hpfs_add_dirent(dir, name, len, &dee);
262 if (r == 1)
263 goto bail2;
264 if (r == -1) {
265 err = -EEXIST;
266 goto bail2;
267 }
268 fnode->len = len;
269 memcpy(fnode->name, name, len > 15 ? 15 : len);
270 fnode->up = cpu_to_le32(dir->i_ino);
271 mark_buffer_dirty(bh);
272
273 insert_inode_hash(result);
274
275 hpfs_write_inode_nolock(result);
276 hpfs_update_directory_times(dir);
277 d_instantiate(dentry, result);
278 brelse(bh);
279 hpfs_unlock(dir->i_sb);
280 return 0;
281bail2:
282 iput(result);
283bail1:
284 brelse(bh);
285 hpfs_free_sectors(dir->i_sb, fno, 1);
286bail:
287 hpfs_unlock(dir->i_sb);
288 return err;
289}
290
291static int hpfs_symlink(struct inode *dir, struct dentry *dentry, const char *symlink)
292{
293 const unsigned char *name = dentry->d_name.name;
294 unsigned len = dentry->d_name.len;
295 struct buffer_head *bh;
296 struct fnode *fnode;
297 fnode_secno fno;
298 int r;
299 struct hpfs_dirent dee;
300 struct inode *result;
301 int err;
302 if ((err = hpfs_chk_name(name, &len))) return err==-ENOENT ? -EINVAL : err;
303 hpfs_lock(dir->i_sb);
304 if (hpfs_sb(dir->i_sb)->sb_eas < 2) {
305 hpfs_unlock(dir->i_sb);
306 return -EPERM;
307 }
308 err = -ENOSPC;
309 fnode = hpfs_alloc_fnode(dir->i_sb, hpfs_i(dir)->i_dno, &fno, &bh);
310 if (!fnode)
311 goto bail;
312 memset(&dee, 0, sizeof dee);
313 dee.archive = 1;
314 dee.hidden = name[0] == '.';
315 dee.fnode = cpu_to_le32(fno);
316 dee.creation_date = dee.write_date = dee.read_date = cpu_to_le32(gmt_to_local(dir->i_sb, get_seconds()));
317
318 result = new_inode(dir->i_sb);
319 if (!result)
320 goto bail1;
321 result->i_ino = fno;
322 hpfs_init_inode(result);
323 hpfs_i(result)->i_parent_dir = dir->i_ino;
324 result->i_ctime.tv_sec = result->i_mtime.tv_sec = result->i_atime.tv_sec = local_to_gmt(dir->i_sb, le32_to_cpu(dee.creation_date));
325 result->i_ctime.tv_nsec = 0;
326 result->i_mtime.tv_nsec = 0;
327 result->i_atime.tv_nsec = 0;
328 hpfs_i(result)->i_ea_size = 0;
329 result->i_mode = S_IFLNK | 0777;
330 result->i_uid = current_fsuid();
331 result->i_gid = current_fsgid();
332 result->i_blocks = 1;
333 set_nlink(result, 1);
334 result->i_size = strlen(symlink);
335 inode_nohighmem(result);
336 result->i_op = &page_symlink_inode_operations;
337 result->i_data.a_ops = &hpfs_symlink_aops;
338
339 r = hpfs_add_dirent(dir, name, len, &dee);
340 if (r == 1)
341 goto bail2;
342 if (r == -1) {
343 err = -EEXIST;
344 goto bail2;
345 }
346 fnode->len = len;
347 memcpy(fnode->name, name, len > 15 ? 15 : len);
348 fnode->up = cpu_to_le32(dir->i_ino);
349 hpfs_set_ea(result, fnode, "SYMLINK", symlink, strlen(symlink));
350 mark_buffer_dirty(bh);
351 brelse(bh);
352
353 insert_inode_hash(result);
354
355 hpfs_write_inode_nolock(result);
356 hpfs_update_directory_times(dir);
357 d_instantiate(dentry, result);
358 hpfs_unlock(dir->i_sb);
359 return 0;
360bail2:
361 iput(result);
362bail1:
363 brelse(bh);
364 hpfs_free_sectors(dir->i_sb, fno, 1);
365bail:
366 hpfs_unlock(dir->i_sb);
367 return err;
368}
369
370static int hpfs_unlink(struct inode *dir, struct dentry *dentry)
371{
372 const unsigned char *name = dentry->d_name.name;
373 unsigned len = dentry->d_name.len;
374 struct quad_buffer_head qbh;
375 struct hpfs_dirent *de;
376 struct inode *inode = d_inode(dentry);
377 dnode_secno dno;
378 int r;
379 int err;
380
381 hpfs_lock(dir->i_sb);
382 hpfs_adjust_length(name, &len);
383
384 err = -ENOENT;
385 de = map_dirent(dir, hpfs_i(dir)->i_dno, name, len, &dno, &qbh);
386 if (!de)
387 goto out;
388
389 err = -EPERM;
390 if (de->first)
391 goto out1;
392
393 err = -EISDIR;
394 if (de->directory)
395 goto out1;
396
397 r = hpfs_remove_dirent(dir, dno, de, &qbh, 1);
398 switch (r) {
399 case 1:
400 hpfs_error(dir->i_sb, "there was error when removing dirent");
401 err = -EFSERROR;
402 break;
403 case 2: /* no space for deleting */
404 err = -ENOSPC;
405 break;
406 default:
407 drop_nlink(inode);
408 err = 0;
409 }
410 goto out;
411
412out1:
413 hpfs_brelse4(&qbh);
414out:
415 if (!err)
416 hpfs_update_directory_times(dir);
417 hpfs_unlock(dir->i_sb);
418 return err;
419}
420
421static int hpfs_rmdir(struct inode *dir, struct dentry *dentry)
422{
423 const unsigned char *name = dentry->d_name.name;
424 unsigned len = dentry->d_name.len;
425 struct quad_buffer_head qbh;
426 struct hpfs_dirent *de;
427 struct inode *inode = d_inode(dentry);
428 dnode_secno dno;
429 int n_items = 0;
430 int err;
431 int r;
432
433 hpfs_adjust_length(name, &len);
434 hpfs_lock(dir->i_sb);
435 err = -ENOENT;
436 de = map_dirent(dir, hpfs_i(dir)->i_dno, name, len, &dno, &qbh);
437 if (!de)
438 goto out;
439
440 err = -EPERM;
441 if (de->first)
442 goto out1;
443
444 err = -ENOTDIR;
445 if (!de->directory)
446 goto out1;
447
448 hpfs_count_dnodes(dir->i_sb, hpfs_i(inode)->i_dno, NULL, NULL, &n_items);
449 err = -ENOTEMPTY;
450 if (n_items)
451 goto out1;
452
453 r = hpfs_remove_dirent(dir, dno, de, &qbh, 1);
454 switch (r) {
455 case 1:
456 hpfs_error(dir->i_sb, "there was error when removing dirent");
457 err = -EFSERROR;
458 break;
459 case 2:
460 err = -ENOSPC;
461 break;
462 default:
463 drop_nlink(dir);
464 clear_nlink(inode);
465 err = 0;
466 }
467 goto out;
468out1:
469 hpfs_brelse4(&qbh);
470out:
471 if (!err)
472 hpfs_update_directory_times(dir);
473 hpfs_unlock(dir->i_sb);
474 return err;
475}
476
477static int hpfs_symlink_readpage(struct file *file, struct page *page)
478{
479 char *link = page_address(page);
480 struct inode *i = page->mapping->host;
481 struct fnode *fnode;
482 struct buffer_head *bh;
483 int err;
484
485 err = -EIO;
486 hpfs_lock(i->i_sb);
487 if (!(fnode = hpfs_map_fnode(i->i_sb, i->i_ino, &bh)))
488 goto fail;
489 err = hpfs_read_ea(i->i_sb, fnode, "SYMLINK", link, PAGE_SIZE);
490 brelse(bh);
491 if (err)
492 goto fail;
493 hpfs_unlock(i->i_sb);
494 SetPageUptodate(page);
495 unlock_page(page);
496 return 0;
497
498fail:
499 hpfs_unlock(i->i_sb);
500 SetPageError(page);
501 unlock_page(page);
502 return err;
503}
504
505const struct address_space_operations hpfs_symlink_aops = {
506 .readpage = hpfs_symlink_readpage
507};
508
509static int hpfs_rename(struct inode *old_dir, struct dentry *old_dentry,
510 struct inode *new_dir, struct dentry *new_dentry)
511{
512 const unsigned char *old_name = old_dentry->d_name.name;
513 unsigned old_len = old_dentry->d_name.len;
514 const unsigned char *new_name = new_dentry->d_name.name;
515 unsigned new_len = new_dentry->d_name.len;
516 struct inode *i = d_inode(old_dentry);
517 struct inode *new_inode = d_inode(new_dentry);
518 struct quad_buffer_head qbh, qbh1;
519 struct hpfs_dirent *dep, *nde;
520 struct hpfs_dirent de;
521 dnode_secno dno;
522 int r;
523 struct buffer_head *bh;
524 struct fnode *fnode;
525 int err;
526
527 if ((err = hpfs_chk_name(new_name, &new_len))) return err;
528 err = 0;
529 hpfs_adjust_length(old_name, &old_len);
530
531 hpfs_lock(i->i_sb);
532 /* order doesn't matter, due to VFS exclusion */
533
534 /* Erm? Moving over the empty non-busy directory is perfectly legal */
535 if (new_inode && S_ISDIR(new_inode->i_mode)) {
536 err = -EINVAL;
537 goto end1;
538 }
539
540 if (!(dep = map_dirent(old_dir, hpfs_i(old_dir)->i_dno, old_name, old_len, &dno, &qbh))) {
541 hpfs_error(i->i_sb, "lookup succeeded but map dirent failed");
542 err = -ENOENT;
543 goto end1;
544 }
545 copy_de(&de, dep);
546 de.hidden = new_name[0] == '.';
547
548 if (new_inode) {
549 int r;
550 if ((r = hpfs_remove_dirent(old_dir, dno, dep, &qbh, 1)) != 2) {
551 if ((nde = map_dirent(new_dir, hpfs_i(new_dir)->i_dno, new_name, new_len, NULL, &qbh1))) {
552 clear_nlink(new_inode);
553 copy_de(nde, &de);
554 memcpy(nde->name, new_name, new_len);
555 hpfs_mark_4buffers_dirty(&qbh1);
556 hpfs_brelse4(&qbh1);
557 goto end;
558 }
559 hpfs_error(new_dir->i_sb, "hpfs_rename: could not find dirent");
560 err = -EFSERROR;
561 goto end1;
562 }
563 err = r == 2 ? -ENOSPC : r == 1 ? -EFSERROR : 0;
564 goto end1;
565 }
566
567 if (new_dir == old_dir) hpfs_brelse4(&qbh);
568
569 if ((r = hpfs_add_dirent(new_dir, new_name, new_len, &de))) {
570 if (r == -1) hpfs_error(new_dir->i_sb, "hpfs_rename: dirent already exists!");
571 err = r == 1 ? -ENOSPC : -EFSERROR;
572 if (new_dir != old_dir) hpfs_brelse4(&qbh);
573 goto end1;
574 }
575
576 if (new_dir == old_dir)
577 if (!(dep = map_dirent(old_dir, hpfs_i(old_dir)->i_dno, old_name, old_len, &dno, &qbh))) {
578 hpfs_error(i->i_sb, "lookup succeeded but map dirent failed at #2");
579 err = -ENOENT;
580 goto end1;
581 }
582
583 if ((r = hpfs_remove_dirent(old_dir, dno, dep, &qbh, 0))) {
584 hpfs_error(i->i_sb, "hpfs_rename: could not remove dirent");
585 err = r == 2 ? -ENOSPC : -EFSERROR;
586 goto end1;
587 }
588
589end:
590 hpfs_i(i)->i_parent_dir = new_dir->i_ino;
591 if (S_ISDIR(i->i_mode)) {
592 inc_nlink(new_dir);
593 drop_nlink(old_dir);
594 }
595 if ((fnode = hpfs_map_fnode(i->i_sb, i->i_ino, &bh))) {
596 fnode->up = cpu_to_le32(new_dir->i_ino);
597 fnode->len = new_len;
598 memcpy(fnode->name, new_name, new_len>15?15:new_len);
599 if (new_len < 15) memset(&fnode->name[new_len], 0, 15 - new_len);
600 mark_buffer_dirty(bh);
601 brelse(bh);
602 }
603end1:
604 if (!err) {
605 hpfs_update_directory_times(old_dir);
606 hpfs_update_directory_times(new_dir);
607 }
608 hpfs_unlock(i->i_sb);
609 return err;
610}
611
612const struct inode_operations hpfs_dir_iops =
613{
614 .create = hpfs_create,
615 .lookup = hpfs_lookup,
616 .unlink = hpfs_unlink,
617 .symlink = hpfs_symlink,
618 .mkdir = hpfs_mkdir,
619 .rmdir = hpfs_rmdir,
620 .mknod = hpfs_mknod,
621 .rename = hpfs_rename,
622 .setattr = hpfs_setattr,
623};