File: /usr/src/linux/fs/ncpfs/dir.c
1 /*
2 * dir.c
3 *
4 * Copyright (C) 1995, 1996 by Volker Lendecke
5 * Modified for big endian by J.F. Chadima and David S. Miller
6 * Modified 1997 Peter Waltenberg, Bill Hawes, David Woodhouse for 2.1 dcache
7 * Modified 1998, 1999 Wolfram Pienkoss for NLS
8 * Modified 1999 Wolfram Pienkoss for directory caching
9 *
10 */
11
12 #include <linux/config.h>
13
14 #include <linux/sched.h>
15 #include <linux/errno.h>
16 #include <linux/stat.h>
17 #include <linux/kernel.h>
18 #include <linux/slab.h>
19 #include <linux/vmalloc.h>
20 #include <linux/mm.h>
21 #include <asm/uaccess.h>
22 #include <asm/byteorder.h>
23 #include <linux/locks.h>
24 #include <linux/smp_lock.h>
25
26 #include <linux/ncp_fs.h>
27
28 #include "ncplib_kernel.h"
29
30 static void ncp_read_volume_list(struct file *, void *, filldir_t,
31 struct ncp_cache_control *);
32 static void ncp_do_readdir(struct file *, void *, filldir_t,
33 struct ncp_cache_control *);
34
35 static int ncp_readdir(struct file *, void *, filldir_t);
36
37 static int ncp_create(struct inode *, struct dentry *, int);
38 static struct dentry *ncp_lookup(struct inode *, struct dentry *);
39 static int ncp_unlink(struct inode *, struct dentry *);
40 static int ncp_mkdir(struct inode *, struct dentry *, int);
41 static int ncp_rmdir(struct inode *, struct dentry *);
42 static int ncp_rename(struct inode *, struct dentry *,
43 struct inode *, struct dentry *);
44 #ifdef CONFIG_NCPFS_EXTRAS
45 extern int ncp_symlink(struct inode *, struct dentry *, const char *);
46 #endif
47
48 struct file_operations ncp_dir_operations =
49 {
50 read: generic_read_dir,
51 readdir: ncp_readdir,
52 ioctl: ncp_ioctl,
53 };
54
55 struct inode_operations ncp_dir_inode_operations =
56 {
57 create: ncp_create,
58 lookup: ncp_lookup,
59 unlink: ncp_unlink,
60 #ifdef CONFIG_NCPFS_EXTRAS
61 symlink: ncp_symlink,
62 #endif
63 mkdir: ncp_mkdir,
64 rmdir: ncp_rmdir,
65 rename: ncp_rename,
66 setattr: ncp_notify_change,
67 };
68
69 /*
70 * Dentry operations routines
71 */
72 static int ncp_lookup_validate(struct dentry *, int);
73 static int ncp_hash_dentry(struct dentry *, struct qstr *);
74 static int ncp_compare_dentry (struct dentry *, struct qstr *, struct qstr *);
75 static int ncp_delete_dentry(struct dentry *);
76
77 struct dentry_operations ncp_dentry_operations =
78 {
79 d_revalidate: ncp_lookup_validate,
80 d_hash: ncp_hash_dentry,
81 d_compare: ncp_compare_dentry,
82 d_delete: ncp_delete_dentry,
83 };
84
85
86 /*
87 * Note: leave the hash unchanged if the directory
88 * is case-sensitive.
89 */
90 static int
91 ncp_hash_dentry(struct dentry *dentry, struct qstr *this)
92 {
93 struct nls_table *t;
94 unsigned long hash;
95 int i;
96
97 t = NCP_IO_TABLE(dentry);
98
99 if (!ncp_case_sensitive(dentry->d_inode)) {
100 hash = init_name_hash();
101 for (i=0; i<this->len ; i++)
102 hash = partial_name_hash(ncp_tolower(t, this->name[i]),
103 hash);
104 this->hash = end_name_hash(hash);
105 }
106 return 0;
107 }
108
109 static int
110 ncp_compare_dentry(struct dentry *dentry, struct qstr *a, struct qstr *b)
111 {
112 if (a->len != b->len)
113 return 1;
114
115 if (ncp_case_sensitive(dentry->d_inode))
116 return strncmp(a->name, b->name, a->len);
117
118 return ncp_strnicmp(NCP_IO_TABLE(dentry), a->name, b->name, a->len);
119 }
120
121 /*
122 * This is the callback from dput() when d_count is going to 0.
123 * We use this to unhash dentries with bad inodes.
124 * Closing files can be safely postponed until iput() - it's done there anyway.
125 */
126 static int
127 ncp_delete_dentry(struct dentry * dentry)
128 {
129 struct inode *inode = dentry->d_inode;
130
131 if (inode) {
132 if (is_bad_inode(inode))
133 return 1;
134 } else
135 {
136 /* N.B. Unhash negative dentries? */
137 }
138 return 0;
139 }
140
141 static inline int
142 ncp_single_volume(struct ncp_server *server)
143 {
144 return (server->m.mounted_vol[0] != '\0');
145 }
146
147 static inline int ncp_is_server_root(struct inode *inode)
148 {
149 return (!ncp_single_volume(NCP_SERVER(inode)) &&
150 inode == inode->i_sb->s_root->d_inode);
151 }
152
153
154 /*
155 * This is the callback when the dcache has a lookup hit.
156 */
157
158
159 #ifdef CONFIG_NCPFS_STRONG
160 /* try to delete a readonly file (NW R bit set) */
161
162 static int
163 ncp_force_unlink(struct inode *dir, struct dentry* dentry)
164 {
165 int res=0x9c,res2;
166 struct nw_modify_dos_info info;
167 __u32 old_nwattr;
168 struct inode *inode;
169
170 memset(&info, 0, sizeof(info));
171
172 /* remove the Read-Only flag on the NW server */
173 inode = dentry->d_inode;
174
175 old_nwattr = NCP_FINFO(inode)->nwattr;
176 info.attributes = old_nwattr & ~(aRONLY|aDELETEINHIBIT|aRENAMEINHIBIT);
177 res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(inode), inode, NULL, DM_ATTRIBUTES, &info);
178 if (res2)
179 goto leave_me;
180
181 /* now try again the delete operation */
182 res = ncp_del_file_or_subdir2(NCP_SERVER(dir), dentry);
183
184 if (res) /* delete failed, set R bit again */
185 {
186 info.attributes = old_nwattr;
187 res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(inode), inode, NULL, DM_ATTRIBUTES, &info);
188 if (res2)
189 goto leave_me;
190 }
191 leave_me:
192 return(res);
193 }
194 #endif /* CONFIG_NCPFS_STRONG */
195
196 #ifdef CONFIG_NCPFS_STRONG
197 static int
198 ncp_force_rename(struct inode *old_dir, struct dentry* old_dentry, char *_old_name,
199 struct inode *new_dir, struct dentry* new_dentry, char *_new_name)
200 {
201 struct nw_modify_dos_info info;
202 int res=0x90,res2;
203 struct inode *old_inode = old_dentry->d_inode;
204 __u32 old_nwattr = NCP_FINFO(old_inode)->nwattr;
205 __u32 new_nwattr = 0; /* shut compiler warning */
206 int old_nwattr_changed = 0;
207 int new_nwattr_changed = 0;
208
209 memset(&info, 0, sizeof(info));
210
211 /* remove the Read-Only flag on the NW server */
212
213 info.attributes = old_nwattr & ~(aRONLY|aRENAMEINHIBIT|aDELETEINHIBIT);
214 res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(old_inode), old_inode, NULL, DM_ATTRIBUTES, &info);
215 if (!res2)
216 old_nwattr_changed = 1;
217 if (new_dentry && new_dentry->d_inode) {
218 new_nwattr = NCP_FINFO(new_dentry->d_inode)->nwattr;
219 info.attributes = new_nwattr & ~(aRONLY|aRENAMEINHIBIT|aDELETEINHIBIT);
220 res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(new_dir), new_dir, _new_name, DM_ATTRIBUTES, &info);
221 if (!res2)
222 new_nwattr_changed = 1;
223 }
224 /* now try again the rename operation */
225 /* but only if something really happened */
226 if (new_nwattr_changed || old_nwattr_changed) {
227 res = ncp_ren_or_mov_file_or_subdir(NCP_SERVER(old_dir),
228 old_dir, _old_name,
229 new_dir, _new_name);
230 }
231 if (res)
232 goto leave_me;
233 /* file was successfully renamed, so:
234 do not set attributes on old file - it no longer exists
235 copy attributes from old file to new */
236 new_nwattr_changed = old_nwattr_changed;
237 new_nwattr = old_nwattr;
238 old_nwattr_changed = 0;
239
240 leave_me:;
241 if (old_nwattr_changed) {
242 info.attributes = old_nwattr;
243 res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(old_inode), old_inode, NULL, DM_ATTRIBUTES, &info);
244 /* ignore errors */
245 }
246 if (new_nwattr_changed) {
247 info.attributes = new_nwattr;
248 res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(new_dir), new_dir, _new_name, DM_ATTRIBUTES, &info);
249 /* ignore errors */
250 }
251 return(res);
252 }
253 #endif /* CONFIG_NCPFS_STRONG */
254
255
256 static int
257 __ncp_lookup_validate(struct dentry * dentry, int flags)
258 {
259 struct ncp_server *server;
260 struct inode *dir = dentry->d_parent->d_inode;
261 struct ncp_entry_info finfo;
262 int res, val = 0, len = dentry->d_name.len + 1;
263 __u8 __name[len];
264
265 if (!dentry->d_inode || !dir)
266 goto finished;
267
268 server = NCP_SERVER(dir);
269
270 if (!ncp_conn_valid(server))
271 goto finished;
272
273 /*
274 * Inspired by smbfs:
275 * The default validation is based on dentry age:
276 * We set the max age at mount time. (But each
277 * successful server lookup renews the timestamp.)
278 */
279 val = NCP_TEST_AGE(server, dentry);
280 if (val)
281 goto finished;
282
283 DDPRINTK("ncp_lookup_validate: %s/%s not valid, age=%ld, server lookup\n",
284 dentry->d_parent->d_name.name, dentry->d_name.name,
285 NCP_GET_AGE(dentry));
286
287 if (ncp_is_server_root(dir)) {
288 res = ncp_io2vol(server, __name, &len, dentry->d_name.name,
289 len-1, 1);
290 if (!res)
291 res = ncp_lookup_volume(server, __name, &(finfo.i));
292 } else {
293 res = ncp_io2vol(server, __name, &len, dentry->d_name.name,
294 len-1, !ncp_preserve_case(dir));
295 if (!res)
296 res = ncp_obtain_info(server, dir, __name, &(finfo.i));
297 }
298 DDPRINTK("ncp_lookup_validate: looked for %s/%s, res=%d\n",
299 dentry->d_parent->d_name.name, __name, res);
300 /*
301 * If we didn't find it, or if it has a different dirEntNum to
302 * what we remember, it's not valid any more.
303 */
304 if (!res) {
305 if (finfo.i.dirEntNum == NCP_FINFO(dentry->d_inode)->dirEntNum) {
306 ncp_new_dentry(dentry);
307 val=1;
308 } else
309 DDPRINTK("ncp_lookup_validate: found, but dirEntNum changed\n");
310
311 ncp_update_inode2(dentry->d_inode, &finfo);
312 }
313
314 finished:
315 DDPRINTK("ncp_lookup_validate: result=%d\n", val);
316 return val;
317 }
318
319 static int
320 ncp_lookup_validate(struct dentry * dentry, int flags)
321 {
322 int res;
323 lock_kernel();
324 res = __ncp_lookup_validate(dentry, flags);
325 unlock_kernel();
326 return res;
327 }
328
329 static struct dentry *
330 ncp_dget_fpos(struct dentry *dentry, struct dentry *parent, unsigned long fpos)
331 {
332 struct dentry *dent = dentry;
333 struct list_head *next;
334
335 if (d_validate(dent, parent)) {
336 if (dent->d_name.len <= NCP_MAXPATHLEN &&
337 (unsigned long)dent->d_fsdata == fpos) {
338 if (!dent->d_inode) {
339 dput(dent);
340 dent = NULL;
341 }
342 return dent;
343 }
344 dput(dent);
345 }
346
347 /* If a pointer is invalid, we search the dentry. */
348 spin_lock(&dcache_lock);
349 next = parent->d_subdirs.next;
350 while (next != &parent->d_subdirs) {
351 dent = list_entry(next, struct dentry, d_child);
352 if ((unsigned long)dent->d_fsdata == fpos) {
353 if (dent->d_inode)
354 dget_locked(dent);
355 else
356 dent = NULL;
357 spin_unlock(&dcache_lock);
358 goto out;
359 }
360 next = next->next;
361 }
362 spin_unlock(&dcache_lock);
363 return NULL;
364
365 out:
366 return dent;
367 }
368
369 static time_t ncp_obtain_mtime(struct dentry *dentry)
370 {
371 struct inode *inode = dentry->d_inode;
372 struct ncp_server *server = NCP_SERVER(inode);
373 struct nw_info_struct i;
374
375 if (!ncp_conn_valid(server) || ncp_is_server_root(inode))
376 return 0;
377
378 if (ncp_obtain_info(server, inode, NULL, &i))
379 return 0;
380
381 return ncp_date_dos2unix(le16_to_cpu(i.modifyTime),
382 le16_to_cpu(i.modifyDate));
383 }
384
385 static int ncp_readdir(struct file *filp, void *dirent, filldir_t filldir)
386 {
387 struct dentry *dentry = filp->f_dentry;
388 struct inode *inode = dentry->d_inode;
389 struct page *page = NULL;
390 struct ncp_server *server = NCP_SERVER(inode);
391 union ncp_dir_cache *cache = NULL;
392 struct ncp_cache_control ctl;
393 int result, mtime_valid = 0;
394 time_t mtime = 0;
395
396 ctl.page = NULL;
397 ctl.cache = NULL;
398
399 DDPRINTK("ncp_readdir: reading %s/%s, pos=%d\n",
400 dentry->d_parent->d_name.name, dentry->d_name.name,
401 (int) filp->f_pos);
402
403 result = -EIO;
404 if (!ncp_conn_valid(server))
405 goto out;
406
407 result = 0;
408 if (filp->f_pos == 0) {
409 if (filldir(dirent, ".", 1, 0, inode->i_ino, DT_DIR))
410 goto out;
411 filp->f_pos = 1;
412 }
413 if (filp->f_pos == 1) {
414 if (filldir(dirent, "..", 2, 1,
415 dentry->d_parent->d_inode->i_ino, DT_DIR))
416 goto out;
417 filp->f_pos = 2;
418 }
419
420 page = grab_cache_page(&inode->i_data, 0);
421 if (!page)
422 goto read_really;
423
424 ctl.cache = cache = kmap(page);
425 ctl.head = cache->head;
426
427 if (!Page_Uptodate(page) || !ctl.head.eof)
428 goto init_cache;
429
430 if (filp->f_pos == 2) {
431 if (jiffies - ctl.head.time >= NCP_MAX_AGE(server))
432 goto init_cache;
433
434 mtime = ncp_obtain_mtime(dentry);
435 mtime_valid = 1;
436 if ((!mtime) || (mtime != ctl.head.mtime))
437 goto init_cache;
438 }
439
440 if (filp->f_pos > ctl.head.end)
441 goto finished;
442
443 ctl.fpos = filp->f_pos + (NCP_DIRCACHE_START - 2);
444 ctl.ofs = ctl.fpos / NCP_DIRCACHE_SIZE;
445 ctl.idx = ctl.fpos % NCP_DIRCACHE_SIZE;
446
447 for (;;) {
448 if (ctl.ofs != 0) {
449 ctl.page = find_lock_page(&inode->i_data, ctl.ofs);
450 if (!ctl.page)
451 goto invalid_cache;
452 ctl.cache = kmap(ctl.page);
453 if (!Page_Uptodate(ctl.page))
454 goto invalid_cache;
455 }
456 while (ctl.idx < NCP_DIRCACHE_SIZE) {
457 struct dentry *dent;
458 int res;
459
460 dent = ncp_dget_fpos(ctl.cache->dentry[ctl.idx],
461 dentry, filp->f_pos);
462 if (!dent)
463 goto invalid_cache;
464 res = filldir(dirent, dent->d_name.name,
465 dent->d_name.len, filp->f_pos,
466 dent->d_inode->i_ino, DT_UNKNOWN);
467 dput(dent);
468 if (res)
469 goto finished;
470 filp->f_pos += 1;
471 ctl.idx += 1;
472 if (filp->f_pos > ctl.head.end)
473 goto finished;
474 }
475 if (ctl.page) {
476 kunmap(ctl.page);
477 SetPageUptodate(ctl.page);
478 UnlockPage(ctl.page);
479 page_cache_release(ctl.page);
480 ctl.page = NULL;
481 }
482 ctl.idx = 0;
483 ctl.ofs += 1;
484 }
485 invalid_cache:
486 if (ctl.page) {
487 kunmap(ctl.page);
488 UnlockPage(ctl.page);
489 page_cache_release(ctl.page);
490 ctl.page = NULL;
491 }
492 ctl.cache = cache;
493 init_cache:
494 ncp_invalidate_dircache_entries(dentry);
495 if (!mtime_valid) {
496 mtime = ncp_obtain_mtime(dentry);
497 mtime_valid = 1;
498 }
499 ctl.head.mtime = mtime;
500 ctl.head.time = jiffies;
501 ctl.head.eof = 0;
502 ctl.fpos = 2;
503 ctl.ofs = 0;
504 ctl.idx = NCP_DIRCACHE_START;
505 ctl.filled = 0;
506 ctl.valid = 1;
507 read_really:
508 if (ncp_is_server_root(inode)) {
509 ncp_read_volume_list(filp, dirent, filldir, &ctl);
510 } else {
511 ncp_do_readdir(filp, dirent, filldir, &ctl);
512 }
513 ctl.head.end = ctl.fpos - 1;
514 ctl.head.eof = ctl.valid;
515 finished:
516 if (page) {
517 cache->head = ctl.head;
518 kunmap(page);
519 SetPageUptodate(page);
520 UnlockPage(page);
521 page_cache_release(page);
522 }
523 if (ctl.page) {
524 kunmap(ctl.page);
525 SetPageUptodate(ctl.page);
526 UnlockPage(ctl.page);
527 page_cache_release(ctl.page);
528 }
529 out:
530 return result;
531 }
532
533 static int
534 ncp_fill_cache(struct file *filp, void *dirent, filldir_t filldir,
535 struct ncp_cache_control *ctrl, struct ncp_entry_info *entry)
536 {
537 struct dentry *newdent, *dentry = filp->f_dentry;
538 struct inode *newino, *inode = dentry->d_inode;
539 struct ncp_cache_control ctl = *ctrl;
540 struct qstr qname;
541 int valid = 0;
542 int hashed = 0;
543 ino_t ino = 0;
544 __u8 __name[256];
545
546 qname.len = 256;
547 if (ncp_vol2io(NCP_SERVER(inode), __name, &qname.len,
548 entry->i.entryName, entry->i.nameLen,
549 !ncp_preserve_entry_case(inode, entry->i.NSCreator)))
550 return 1; /* I'm not sure */
551
552 qname.name = __name;
553 qname.hash = full_name_hash(qname.name, qname.len);
554
555 if (dentry->d_op && dentry->d_op->d_hash)
556 if (dentry->d_op->d_hash(dentry, &qname) != 0)
557 goto end_advance;
558
559 newdent = d_lookup(dentry, &qname);
560
561 if (!newdent) {
562 newdent = d_alloc(dentry, &qname);
563 if (!newdent)
564 goto end_advance;
565 } else {
566 hashed = 1;
567 memcpy((char *) newdent->d_name.name, qname.name,
568 newdent->d_name.len);
569 }
570
571 if (!newdent->d_inode) {
572 entry->opened = 0;
573 entry->ino = iunique(inode->i_sb, 2);
574 newino = ncp_iget(inode->i_sb, entry);
575 if (newino) {
576 newdent->d_op = &ncp_dentry_operations;
577 d_instantiate(newdent, newino);
578 if (!hashed)
579 d_rehash(newdent);
580 }
581 } else
582 ncp_update_inode2(newdent->d_inode, entry);
583
584 if (newdent->d_inode) {
585 ino = newdent->d_inode->i_ino;
586 newdent->d_fsdata = (void *) ctl.fpos;
587 ncp_new_dentry(newdent);
588 }
589
590 if (ctl.idx >= NCP_DIRCACHE_SIZE) {
591 if (ctl.page) {
592 kunmap(ctl.page);
593 SetPageUptodate(ctl.page);
594 UnlockPage(ctl.page);
595 page_cache_release(ctl.page);
596 }
597 ctl.cache = NULL;
598 ctl.idx -= NCP_DIRCACHE_SIZE;
599 ctl.ofs += 1;
600 ctl.page = grab_cache_page(&inode->i_data, ctl.ofs);
601 if (ctl.page)
602 ctl.cache = kmap(ctl.page);
603 }
604 if (ctl.cache) {
605 ctl.cache->dentry[ctl.idx] = newdent;
606 valid = 1;
607 }
608 dput(newdent);
609 end_advance:
610 if (!valid)
611 ctl.valid = 0;
612 if (!ctl.filled && (ctl.fpos == filp->f_pos)) {
613 if (!ino)
614 ino = find_inode_number(dentry, &qname);
615 if (!ino)
616 ino = iunique(inode->i_sb, 2);
617 ctl.filled = filldir(dirent, qname.name, qname.len,
618 filp->f_pos, ino, DT_UNKNOWN);
619 if (!ctl.filled)
620 filp->f_pos += 1;
621 }
622 ctl.fpos += 1;
623 ctl.idx += 1;
624 *ctrl = ctl;
625 return (ctl.valid || !ctl.filled);
626 }
627
628 static void
629 ncp_read_volume_list(struct file *filp, void *dirent, filldir_t filldir,
630 struct ncp_cache_control *ctl)
631 {
632 struct dentry *dentry = filp->f_dentry;
633 struct inode *inode = dentry->d_inode;
634 struct ncp_server *server = NCP_SERVER(inode);
635 struct ncp_volume_info info;
636 struct ncp_entry_info entry;
637 int i;
638
639 DPRINTK("ncp_read_volume_list: pos=%ld\n",
640 (unsigned long) filp->f_pos);
641
642 for (i = 0; i < NCP_NUMBER_OF_VOLUMES; i++) {
643
644 if (ncp_get_volume_info_with_number(server, i, &info) != 0)
645 return;
646 if (!strlen(info.volume_name))
647 continue;
648
649 DPRINTK("ncp_read_volume_list: found vol: %s\n",
650 info.volume_name);
651
652 if (ncp_lookup_volume(server, info.volume_name,
653 &entry.i)) {
654 DPRINTK("ncpfs: could not lookup vol %s\n",
655 info.volume_name);
656 continue;
657 }
658 if (!ncp_fill_cache(filp, dirent, filldir, ctl, &entry))
659 return;
660 }
661 }
662
663 static void
664 ncp_do_readdir(struct file *filp, void *dirent, filldir_t filldir,
665 struct ncp_cache_control *ctl)
666 {
667 struct dentry *dentry = filp->f_dentry;
668 struct inode *dir = dentry->d_inode;
669 struct ncp_server *server = NCP_SERVER(dir);
670 struct nw_search_sequence seq;
671 struct ncp_entry_info entry;
672 int err;
673
674 DPRINTK("ncp_do_readdir: %s/%s, fpos=%ld\n",
675 dentry->d_parent->d_name.name, dentry->d_name.name,
676 (unsigned long) filp->f_pos);
677 PPRINTK("ncp_do_readdir: init %s, volnum=%d, dirent=%u\n",
678 dentry->d_name.name, NCP_FINFO(dir)->volNumber,
679 NCP_FINFO(dir)->dirEntNum);
680
681 err = ncp_initialize_search(server, dir, &seq);
682 if (err) {
683 DPRINTK("ncp_do_readdir: init failed, err=%d\n", err);
684 return;
685 }
686 for (;;) {
687 err = ncp_search_for_file_or_subdir(server, &seq, &entry.i);
688 if (err) {
689 DPRINTK("ncp_do_readdir: search failed, err=%d\n", err);
690 return;
691 }
692 if (!ncp_fill_cache(filp, dirent, filldir, ctl, &entry))
693 return;
694 }
695 }
696
697 int ncp_conn_logged_in(struct super_block *sb)
698 {
699 struct ncp_server* server = NCP_SBP(sb);
700 struct nw_info_struct i;
701 int result, len = strlen(server->m.mounted_vol) + 1;
702 __u8 __name[len];
703
704 if (ncp_single_volume(server)) {
705 struct dentry* dent;
706
707 result = -ENOENT;
708 if (ncp_io2vol(server, __name, &len, server->m.mounted_vol,
709 len-1, 1))
710 goto out;
711 if (ncp_lookup_volume(server, __name, &i)) {
712 PPRINTK("ncp_conn_logged_in: %s not found\n",
713 server->m.mounted_vol);
714 goto out;
715 }
716 dent = sb->s_root;
717 if (dent) {
718 struct inode* ino = dent->d_inode;
719 if (ino) {
720 NCP_FINFO(ino)->volNumber = i.volNumber;
721 NCP_FINFO(ino)->dirEntNum = i.dirEntNum;
722 NCP_FINFO(ino)->DosDirNum = i.DosDirNum;
723 } else {
724 DPRINTK("ncpfs: sb->s_root->d_inode == NULL!\n");
725 }
726 } else {
727 DPRINTK("ncpfs: sb->s_root == NULL!\n");
728 }
729 }
730 result = 0;
731
732 out:
733 return result;
734 }
735
736 static struct dentry *ncp_lookup(struct inode *dir, struct dentry *dentry)
737 {
738 struct ncp_server *server = NCP_SERVER(dir);
739 struct inode *inode = NULL;
740 struct ncp_entry_info finfo;
741 int error, res, len = dentry->d_name.len + 1;
742 __u8 __name[len];
743
744 error = -EIO;
745 if (!ncp_conn_valid(server))
746 goto finished;
747
748 PPRINTK("ncp_lookup: server lookup for %s/%s\n",
749 dentry->d_parent->d_name.name, dentry->d_name.name);
750
751 if (ncp_is_server_root(dir)) {
752 res = ncp_io2vol(server, __name, &len, dentry->d_name.name,
753 len-1, 1);
754 if (!res)
755 res = ncp_lookup_volume(server, __name, &(finfo.i));
756 } else {
757 res = ncp_io2vol(server, __name, &len, dentry->d_name.name,
758 len-1, !ncp_preserve_case(dir));
759 if (!res)
760 res = ncp_obtain_info(server, dir, __name, &(finfo.i));
761 }
762 PPRINTK("ncp_lookup: looked for %s/%s, res=%d\n",
763 dentry->d_parent->d_name.name, __name, res);
764 /*
765 * If we didn't find an entry, make a negative dentry.
766 */
767 if (res)
768 goto add_entry;
769
770 /*
771 * Create an inode for the entry.
772 */
773 finfo.opened = 0;
774 finfo.ino = iunique(dir->i_sb, 2);
775 error = -EACCES;
776 inode = ncp_iget(dir->i_sb, &finfo);
777
778 if (inode) {
779 ncp_new_dentry(dentry);
780 add_entry:
781 dentry->d_op = &ncp_dentry_operations;
782 d_add(dentry, inode);
783 error = 0;
784 }
785
786 finished:
787 PPRINTK("ncp_lookup: result=%d\n", error);
788 return ERR_PTR(error);
789 }
790
791 /*
792 * This code is common to create, mkdir, and mknod.
793 */
794 static int ncp_instantiate(struct inode *dir, struct dentry *dentry,
795 struct ncp_entry_info *finfo)
796 {
797 struct inode *inode;
798 int error = -EINVAL;
799
800 finfo->ino = iunique(dir->i_sb, 2);
801 inode = ncp_iget(dir->i_sb, finfo);
802 if (!inode)
803 goto out_close;
804 d_instantiate(dentry,inode);
805 error = 0;
806 out:
807 return error;
808
809 out_close:
810 PPRINTK("ncp_instantiate: %s/%s failed, closing file\n",
811 dentry->d_parent->d_name.name, dentry->d_name.name);
812 ncp_close_file(NCP_SERVER(dir), finfo->file_handle);
813 goto out;
814 }
815
816 int ncp_create_new(struct inode *dir, struct dentry *dentry, int mode,
817 int attributes)
818 {
819 struct ncp_server *server = NCP_SERVER(dir);
820 struct ncp_entry_info finfo;
821 int error, result, len = dentry->d_name.len + 1;
822 int opmode;
823 __u8 __name[len];
824
825 PPRINTK("ncp_create_new: creating %s/%s, mode=%x\n",
826 dentry->d_parent->d_name.name, dentry->d_name.name, mode);
827 error = -EIO;
828 if (!ncp_conn_valid(server))
829 goto out;
830
831 ncp_age_dentry(server, dentry);
832 error = ncp_io2vol(server, __name, &len, dentry->d_name.name,
833 len-1, !ncp_preserve_case(dir));
834 if (error)
835 goto out;
836
837 error = -EACCES;
838
839 if (S_ISREG(mode) &&
840 (server->m.flags & NCP_MOUNT_EXTRAS) &&
841 (mode & S_IXUGO))
842 attributes |= aSYSTEM;
843
844 result = ncp_open_create_file_or_subdir(server, dir, __name,
845 OC_MODE_CREATE | OC_MODE_OPEN | OC_MODE_REPLACE,
846 attributes, AR_READ | AR_WRITE, &finfo);
847 opmode = O_RDWR;
848 if (result) {
849 result = ncp_open_create_file_or_subdir(server, dir, __name,
850 OC_MODE_CREATE | OC_MODE_OPEN | OC_MODE_REPLACE,
851 attributes, AR_WRITE, &finfo);
852 if (result) {
853 if (result == 0x87)
854 error = -ENAMETOOLONG;
855 DPRINTK("ncp_create: %s/%s failed\n",
856 dentry->d_parent->d_name.name, dentry->d_name.name);
857 goto out;
858 }
859 opmode = O_WRONLY;
860 }
861 finfo.access = opmode;
862 error = ncp_instantiate(dir, dentry, &finfo);
863 out:
864 return error;
865 }
866
867 static int ncp_create(struct inode *dir, struct dentry *dentry, int mode)
868 {
869 return ncp_create_new(dir, dentry, mode, 0);
870 }
871
872 static int ncp_mkdir(struct inode *dir, struct dentry *dentry, int mode)
873 {
874 struct ncp_entry_info finfo;
875 struct ncp_server *server = NCP_SERVER(dir);
876 int error, len = dentry->d_name.len + 1;
877 __u8 __name[len];
878
879 DPRINTK("ncp_mkdir: making %s/%s\n",
880 dentry->d_parent->d_name.name, dentry->d_name.name);
881 error = -EIO;
882 if (!ncp_conn_valid(server))
883 goto out;
884
885 ncp_age_dentry(server, dentry);
886 error = ncp_io2vol(server, __name, &len, dentry->d_name.name,
887 len-1, !ncp_preserve_case(dir));
888 if (error)
889 goto out;
890
891 error = -EACCES;
892 if (ncp_open_create_file_or_subdir(server, dir, __name,
893 OC_MODE_CREATE, aDIR, 0xffff,
894 &finfo) == 0)
895 {
896 error = ncp_instantiate(dir, dentry, &finfo);
897 }
898 out:
899 return error;
900 }
901
902 static int ncp_rmdir(struct inode *dir, struct dentry *dentry)
903 {
904 struct ncp_server *server = NCP_SERVER(dir);
905 int error, result, len = dentry->d_name.len + 1;
906 __u8 __name[len];
907
908 DPRINTK("ncp_rmdir: removing %s/%s\n",
909 dentry->d_parent->d_name.name, dentry->d_name.name);
910
911 error = -EIO;
912 if (!ncp_conn_valid(server))
913 goto out;
914
915 error = -EBUSY;
916 if (!d_unhashed(dentry))
917 goto out;
918
919 error = ncp_io2vol(server, __name, &len, dentry->d_name.name,
920 len-1, !ncp_preserve_case(dir));
921 if (error)
922 goto out;
923
924 result = ncp_del_file_or_subdir(server, dir, __name);
925 switch (result) {
926 case 0x00:
927 error = 0;
928 break;
929 case 0x85: /* unauthorized to delete file */
930 case 0x8A: /* unauthorized to delete file */
931 error = -EACCES;
932 break;
933 case 0x8F:
934 case 0x90: /* read only */
935 error = -EPERM;
936 break;
937 case 0x9F: /* in use by another client */
938 error = -EBUSY;
939 break;
940 case 0xA0: /* directory not empty */
941 error = -ENOTEMPTY;
942 break;
943 case 0xFF: /* someone deleted file */
944 error = -ENOENT;
945 break;
946 default:
947 error = -EACCES;
948 break;
949 }
950 out:
951 return error;
952 }
953
954 static int ncp_unlink(struct inode *dir, struct dentry *dentry)
955 {
956 struct inode *inode = dentry->d_inode;
957 struct ncp_server *server = NCP_SERVER(dir);
958 int error;
959
960 DPRINTK("ncp_unlink: unlinking %s/%s\n",
961 dentry->d_parent->d_name.name, dentry->d_name.name);
962
963 error = -EIO;
964 if (!ncp_conn_valid(server))
965 goto out;
966
967 /*
968 * Check whether to close the file ...
969 */
970 if (inode) {
971 PPRINTK("ncp_unlink: closing file\n");
972 ncp_make_closed(inode);
973 }
974
975 error = ncp_del_file_or_subdir2(server, dentry);
976 #ifdef CONFIG_NCPFS_STRONG
977 /* 9C is Invalid path.. It should be 8F, 90 - read only, but
978 it is not :-( */
979 if ((error == 0x9C || error == 0x90) && server->m.flags & NCP_MOUNT_STRONG) { /* R/O */
980 error = ncp_force_unlink(dir, dentry);
981 }
982 #endif
983 switch (error) {
984 case 0x00:
985 DPRINTK("ncp: removed %s/%s\n",
986 dentry->d_parent->d_name.name, dentry->d_name.name);
987 break;
988 case 0x85:
989 case 0x8A:
990 error = -EACCES;
991 break;
992 case 0x8D: /* some files in use */
993 case 0x8E: /* all files in use */
994 error = -EBUSY;
995 break;
996 case 0x8F: /* some read only */
997 case 0x90: /* all read only */
998 case 0x9C: /* !!! returned when in-use or read-only by NW4 */
999 error = -EPERM;
1000 break;
1001 case 0xFF:
1002 error = -ENOENT;
1003 break;
1004 default:
1005 error = -EACCES;
1006 break;
1007 }
1008
1009 out:
1010 return error;
1011 }
1012
1013 static int ncp_rename(struct inode *old_dir, struct dentry *old_dentry,
1014 struct inode *new_dir, struct dentry *new_dentry)
1015 {
1016 struct ncp_server *server = NCP_SERVER(old_dir);
1017 int error;
1018 int old_len = old_dentry->d_name.len + 1;
1019 int new_len = new_dentry->d_name.len + 1;
1020 __u8 __old_name[old_len], __new_name[new_len];
1021
1022 DPRINTK("ncp_rename: %s/%s to %s/%s\n",
1023 old_dentry->d_parent->d_name.name, old_dentry->d_name.name,
1024 new_dentry->d_parent->d_name.name, new_dentry->d_name.name);
1025
1026 error = -EIO;
1027 if (!ncp_conn_valid(server))
1028 goto out;
1029
1030 ncp_age_dentry(server, old_dentry);
1031 ncp_age_dentry(server, new_dentry);
1032
1033 error = ncp_io2vol(server, __old_name, &old_len,
1034 old_dentry->d_name.name, old_len-1,
1035 !ncp_preserve_case(old_dir));
1036 if (error)
1037 goto out;
1038
1039 error = ncp_io2vol(server, __new_name, &new_len,
1040 new_dentry->d_name.name, new_len-1,
1041 !ncp_preserve_case(new_dir));
1042 if (error)
1043 goto out;
1044
1045 error = ncp_ren_or_mov_file_or_subdir(server, old_dir, __old_name,
1046 new_dir, __new_name);
1047 #ifdef CONFIG_NCPFS_STRONG
1048 if ((error == 0x90 || error == 0x8B || error == -EACCES) &&
1049 server->m.flags & NCP_MOUNT_STRONG) { /* RO */
1050 error = ncp_force_rename(old_dir, old_dentry, __old_name,
1051 new_dir, new_dentry, __new_name);
1052 }
1053 #endif
1054 switch (error) {
1055 case 0x00:
1056 DPRINTK("ncp renamed %s -> %s.\n",
1057 old_dentry->d_name.name,new_dentry->d_name.name);
1058 break;
1059 case 0x9E:
1060 error = -ENAMETOOLONG;
1061 break;
1062 case 0xFF:
1063 error = -ENOENT;
1064 break;
1065 default:
1066 error = -EACCES;
1067 break;
1068 }
1069 out:
1070 return error;
1071 }
1072
1073 /* The following routines are taken directly from msdos-fs */
1074
1075 /* Linear day numbers of the respective 1sts in non-leap years. */
1076
1077 static int day_n[] =
1078 {0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 0, 0, 0, 0};
1079 /* Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec */
1080
1081
1082 extern struct timezone sys_tz;
1083
1084 static int utc2local(int time)
1085 {
1086 return time - sys_tz.tz_minuteswest * 60;
1087 }
1088
1089 static int local2utc(int time)
1090 {
1091 return time + sys_tz.tz_minuteswest * 60;
1092 }
1093
1094 /* Convert a MS-DOS time/date pair to a UNIX date (seconds since 1 1 70). */
1095 int
1096 ncp_date_dos2unix(unsigned short time, unsigned short date)
1097 {
1098 int month, year, secs;
1099
1100 /* first subtract and mask after that... Otherwise, if
1101 date == 0, bad things happen */
1102 month = ((date >> 5) - 1) & 15;
1103 year = date >> 9;
1104 secs = (time & 31) * 2 + 60 * ((time >> 5) & 63) + (time >> 11) * 3600 +
1105 86400 * ((date & 31) - 1 + day_n[month] + (year / 4) +
1106 year * 365 - ((year & 3) == 0 && month < 2 ? 1 : 0) + 3653);
1107 /* days since 1.1.70 plus 80's leap day */
1108 return local2utc(secs);
1109 }
1110
1111
1112 /* Convert linear UNIX date to a MS-DOS time/date pair. */
1113 void
1114 ncp_date_unix2dos(int unix_date, unsigned short *time, unsigned short *date)
1115 {
1116 int day, year, nl_day, month;
1117
1118 unix_date = utc2local(unix_date);
1119 *time = (unix_date % 60) / 2 + (((unix_date / 60) % 60) << 5) +
1120 (((unix_date / 3600) % 24) << 11);
1121 day = unix_date / 86400 - 3652;
1122 year = day / 365;
1123 if ((year + 3) / 4 + 365 * year > day)
1124 year--;
1125 day -= (year + 3) / 4 + 365 * year;
1126 if (day == 59 && !(year & 3)) {
1127 nl_day = day;
1128 month = 2;
1129 } else {
1130 nl_day = (year & 3) || day <= 59 ? day : day - 1;
1131 for (month = 0; month < 12; month++)
1132 if (day_n[month] > nl_day)
1133 break;
1134 }
1135 *date = nl_day - day_n[month - 1] + 1 + (month << 5) + (year << 9);
1136 }
1137