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[S390] Fix comments in lowcore structure
[zen-stable.git] / fs / ncpfs / ncplib_kernel.c
blob97645f112114e0c2f1aa4304a1f85046ec66ebb6
1 /*
2 * ncplib_kernel.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 1999 Wolfram Pienkoss for NLS
8 * Modified 2000 Ben Harris, University of Cambridge for NFS NS meta-info
9 *
10 */
11
12
13
14 #include "ncplib_kernel.h"
15
16 static inline void assert_server_locked(struct ncp_server *server)
17 {
18 if (server->lock == 0) {
19 DPRINTK("ncpfs: server not locked!\n");
20 }
21 }
22
23 static void ncp_add_byte(struct ncp_server *server, __u8 x)
24 {
25 assert_server_locked(server);
26 *(__u8 *) (&(server->packet[server->current_size])) = x;
27 server->current_size += 1;
28 return;
29 }
30
31 static void ncp_add_word(struct ncp_server *server, __le16 x)
32 {
33 assert_server_locked(server);
34 put_unaligned(x, (__le16 *) (&(server->packet[server->current_size])));
35 server->current_size += 2;
36 return;
37 }
38
39 static void ncp_add_be16(struct ncp_server *server, __u16 x)
40 {
41 assert_server_locked(server);
42 put_unaligned(cpu_to_be16(x), (__be16 *) (&(server->packet[server->current_size])));
43 server->current_size += 2;
44 }
45
46 static void ncp_add_dword(struct ncp_server *server, __le32 x)
47 {
48 assert_server_locked(server);
49 put_unaligned(x, (__le32 *) (&(server->packet[server->current_size])));
50 server->current_size += 4;
51 return;
52 }
53
54 static void ncp_add_be32(struct ncp_server *server, __u32 x)
55 {
56 assert_server_locked(server);
57 put_unaligned(cpu_to_be32(x), (__be32 *)(&(server->packet[server->current_size])));
58 server->current_size += 4;
59 }
60
61 static inline void ncp_add_dword_lh(struct ncp_server *server, __u32 x) {
62 ncp_add_dword(server, cpu_to_le32(x));
63 }
64
65 static void ncp_add_mem(struct ncp_server *server, const void *source, int size)
66 {
67 assert_server_locked(server);
68 memcpy(&(server->packet[server->current_size]), source, size);
69 server->current_size += size;
70 return;
71 }
72
73 static void ncp_add_pstring(struct ncp_server *server, const char *s)
74 {
75 int len = strlen(s);
76 assert_server_locked(server);
77 if (len > 255) {
78 DPRINTK("ncpfs: string too long: %s\n", s);
79 len = 255;
80 }
81 ncp_add_byte(server, len);
82 ncp_add_mem(server, s, len);
83 return;
84 }
85
86 static inline void ncp_init_request(struct ncp_server *server)
87 {
88 ncp_lock_server(server);
89
90 server->current_size = sizeof(struct ncp_request_header);
91 server->has_subfunction = 0;
92 }
93
94 static inline void ncp_init_request_s(struct ncp_server *server, int subfunction)
95 {
96 ncp_lock_server(server);
97
98 server->current_size = sizeof(struct ncp_request_header) + 2;
99 ncp_add_byte(server, subfunction);
100
101 server->has_subfunction = 1;
102 }
103
104 static inline char *
105 ncp_reply_data(struct ncp_server *server, int offset)
106 {
107 return &(server->packet[sizeof(struct ncp_reply_header) + offset]);
108 }
109
110 static inline u8 BVAL(void *data)
111 {
112 return *(u8 *)data;
113 }
114
115 static u8 ncp_reply_byte(struct ncp_server *server, int offset)
116 {
117 return *(u8 *)ncp_reply_data(server, offset);
118 }
119
120 static inline u16 WVAL_LH(void *data)
121 {
122 return get_unaligned_le16(data);
123 }
124
125 static u16
126 ncp_reply_le16(struct ncp_server *server, int offset)
127 {
128 return get_unaligned_le16(ncp_reply_data(server, offset));
129 }
130
131 static u16
132 ncp_reply_be16(struct ncp_server *server, int offset)
133 {
134 return get_unaligned_be16(ncp_reply_data(server, offset));
135 }
136
137 static inline u32 DVAL_LH(void *data)
138 {
139 return get_unaligned_le32(data);
140 }
141
142 static __le32
143 ncp_reply_dword(struct ncp_server *server, int offset)
144 {
145 return get_unaligned((__le32 *)ncp_reply_data(server, offset));
146 }
147
148 static inline __u32 ncp_reply_dword_lh(struct ncp_server* server, int offset) {
149 return le32_to_cpu(ncp_reply_dword(server, offset));
150 }
151
152 int
153 ncp_negotiate_buffersize(struct ncp_server *server, int size, int *target)
154 {
155 int result;
156
157 ncp_init_request(server);
158 ncp_add_be16(server, size);
159
160 if ((result = ncp_request(server, 33)) != 0) {
161 ncp_unlock_server(server);
162 return result;
163 }
164 *target = min_t(unsigned int, ncp_reply_be16(server, 0), size);
165
166 ncp_unlock_server(server);
167 return 0;
168 }
169
170
171 /* options:
172 * bit 0 ipx checksum
173 * bit 1 packet signing
174 */
175 int
176 ncp_negotiate_size_and_options(struct ncp_server *server,
177 int size, int options, int *ret_size, int *ret_options) {
178 int result;
179
180 /* there is minimum */
181 if (size < NCP_BLOCK_SIZE) size = NCP_BLOCK_SIZE;
182
183 ncp_init_request(server);
184 ncp_add_be16(server, size);
185 ncp_add_byte(server, options);
186
187 if ((result = ncp_request(server, 0x61)) != 0)
188 {
189 ncp_unlock_server(server);
190 return result;
191 }
192
193 /* NCP over UDP returns 0 (!!!) */
194 result = ncp_reply_be16(server, 0);
195 if (result >= NCP_BLOCK_SIZE)
196 size = min(result, size);
197 *ret_size = size;
198 *ret_options = ncp_reply_byte(server, 4);
199
200 ncp_unlock_server(server);
201 return 0;
202 }
203
204 int ncp_get_volume_info_with_number(struct ncp_server* server,
205 int n, struct ncp_volume_info* target) {
206 int result;
207 int len;
208
209 ncp_init_request_s(server, 44);
210 ncp_add_byte(server, n);
211
212 if ((result = ncp_request(server, 22)) != 0) {
213 goto out;
214 }
215 target->total_blocks = ncp_reply_dword_lh(server, 0);
216 target->free_blocks = ncp_reply_dword_lh(server, 4);
217 target->purgeable_blocks = ncp_reply_dword_lh(server, 8);
218 target->not_yet_purgeable_blocks = ncp_reply_dword_lh(server, 12);
219 target->total_dir_entries = ncp_reply_dword_lh(server, 16);
220 target->available_dir_entries = ncp_reply_dword_lh(server, 20);
221 target->sectors_per_block = ncp_reply_byte(server, 28);
222
223 memset(&(target->volume_name), 0, sizeof(target->volume_name));
224
225 result = -EIO;
226 len = ncp_reply_byte(server, 29);
227 if (len > NCP_VOLNAME_LEN) {
228 DPRINTK("ncpfs: volume name too long: %d\n", len);
229 goto out;
230 }
231 memcpy(&(target->volume_name), ncp_reply_data(server, 30), len);
232 result = 0;
233 out:
234 ncp_unlock_server(server);
235 return result;
236 }
237
238 int ncp_get_directory_info(struct ncp_server* server, __u8 n,
239 struct ncp_volume_info* target) {
240 int result;
241 int len;
242
243 ncp_init_request_s(server, 45);
244 ncp_add_byte(server, n);
245
246 if ((result = ncp_request(server, 22)) != 0) {
247 goto out;
248 }
249 target->total_blocks = ncp_reply_dword_lh(server, 0);
250 target->free_blocks = ncp_reply_dword_lh(server, 4);
251 target->purgeable_blocks = 0;
252 target->not_yet_purgeable_blocks = 0;
253 target->total_dir_entries = ncp_reply_dword_lh(server, 8);
254 target->available_dir_entries = ncp_reply_dword_lh(server, 12);
255 target->sectors_per_block = ncp_reply_byte(server, 20);
256
257 memset(&(target->volume_name), 0, sizeof(target->volume_name));
258
259 result = -EIO;
260 len = ncp_reply_byte(server, 21);
261 if (len > NCP_VOLNAME_LEN) {
262 DPRINTK("ncpfs: volume name too long: %d\n", len);
263 goto out;
264 }
265 memcpy(&(target->volume_name), ncp_reply_data(server, 22), len);
266 result = 0;
267 out:
268 ncp_unlock_server(server);
269 return result;
270 }
271
272 int
273 ncp_close_file(struct ncp_server *server, const char *file_id)
274 {
275 int result;
276
277 ncp_init_request(server);
278 ncp_add_byte(server, 0);
279 ncp_add_mem(server, file_id, 6);
280
281 result = ncp_request(server, 66);
282 ncp_unlock_server(server);
283 return result;
284 }
285
286 int
287 ncp_make_closed(struct inode *inode)
288 {
289 int err;
290
291 err = 0;
292 mutex_lock(&NCP_FINFO(inode)->open_mutex);
293 if (atomic_read(&NCP_FINFO(inode)->opened) == 1) {
294 atomic_set(&NCP_FINFO(inode)->opened, 0);
295 err = ncp_close_file(NCP_SERVER(inode), NCP_FINFO(inode)->file_handle);
296
297 if (!err)
298 PPRINTK("ncp_make_closed: volnum=%d, dirent=%u, error=%d\n",
299 NCP_FINFO(inode)->volNumber,
300 NCP_FINFO(inode)->dirEntNum, err);
301 }
302 mutex_unlock(&NCP_FINFO(inode)->open_mutex);
303 return err;
304 }
305
306 static void ncp_add_handle_path(struct ncp_server *server, __u8 vol_num,
307 __le32 dir_base, int have_dir_base,
308 const char *path)
309 {
310 ncp_add_byte(server, vol_num);
311 ncp_add_dword(server, dir_base);
312 if (have_dir_base != 0) {
313 ncp_add_byte(server, 1); /* dir_base */
314 } else {
315 ncp_add_byte(server, 0xff); /* no handle */
316 }
317 if (path != NULL) {
318 ncp_add_byte(server, 1); /* 1 component */
319 ncp_add_pstring(server, path);
320 } else {
321 ncp_add_byte(server, 0);
322 }
323 }
324
325 int ncp_dirhandle_alloc(struct ncp_server* server, __u8 volnum, __le32 dirent,
326 __u8* dirhandle) {
327 int result;
328
329 ncp_init_request(server);
330 ncp_add_byte(server, 12); /* subfunction */
331 ncp_add_byte(server, NW_NS_DOS);
332 ncp_add_byte(server, 0);
333 ncp_add_word(server, 0);
334 ncp_add_handle_path(server, volnum, dirent, 1, NULL);
335 if ((result = ncp_request(server, 87)) == 0) {
336 *dirhandle = ncp_reply_byte(server, 0);
337 }
338 ncp_unlock_server(server);
339 return result;
340 }
341
342 int ncp_dirhandle_free(struct ncp_server* server, __u8 dirhandle) {
343 int result;
344
345 ncp_init_request_s(server, 20);
346 ncp_add_byte(server, dirhandle);
347 result = ncp_request(server, 22);
348 ncp_unlock_server(server);
349 return result;
350 }
351
352 void ncp_extract_file_info(void *structure, struct nw_info_struct *target)
353 {
354 __u8 *name_len;
355 const int info_struct_size = offsetof(struct nw_info_struct, nameLen);
356
357 memcpy(target, structure, info_struct_size);
358 name_len = structure + info_struct_size;
359 target->nameLen = *name_len;
360 memcpy(target->entryName, name_len + 1, *name_len);
361 target->entryName[*name_len] = '\0';
362 target->volNumber = le32_to_cpu(target->volNumber);
363 return;
364 }
365
366 #ifdef CONFIG_NCPFS_NFS_NS
367 static inline void ncp_extract_nfs_info(unsigned char *structure,
368 struct nw_nfs_info *target)
369 {
370 target->mode = DVAL_LH(structure);
371 target->rdev = DVAL_LH(structure + 8);
372 }
373 #endif
374
375 int ncp_obtain_nfs_info(struct ncp_server *server,
376 struct nw_info_struct *target)
377
378 {
379 int result = 0;
380 #ifdef CONFIG_NCPFS_NFS_NS
381 __u32 volnum = target->volNumber;
382
383 if (ncp_is_nfs_extras(server, volnum)) {
384 ncp_init_request(server);
385 ncp_add_byte(server, 19); /* subfunction */
386 ncp_add_byte(server, server->name_space[volnum]);
387 ncp_add_byte(server, NW_NS_NFS);
388 ncp_add_byte(server, 0);
389 ncp_add_byte(server, volnum);
390 ncp_add_dword(server, target->dirEntNum);
391 /* We must retrieve both nlinks and rdev, otherwise some server versions
392 report zeroes instead of valid data */
393 ncp_add_dword_lh(server, NSIBM_NFS_MODE | NSIBM_NFS_NLINKS | NSIBM_NFS_RDEV);
394
395 if ((result = ncp_request(server, 87)) == 0) {
396 ncp_extract_nfs_info(ncp_reply_data(server, 0), &target->nfs);
397 DPRINTK(KERN_DEBUG
398 "ncp_obtain_nfs_info: (%s) mode=0%o, rdev=0x%x\n",
399 target->entryName, target->nfs.mode,
400 target->nfs.rdev);
401 } else {
402 target->nfs.mode = 0;
403 target->nfs.rdev = 0;
404 }
405 ncp_unlock_server(server);
406
407 } else
408 #endif
409 {
410 target->nfs.mode = 0;
411 target->nfs.rdev = 0;
412 }
413 return result;
414 }
415
416 /*
417 * Returns information for a (one-component) name relative to
418 * the specified directory.
419 */
420 int ncp_obtain_info(struct ncp_server *server, struct inode *dir, char *path,
421 struct nw_info_struct *target)
422 {
423 __u8 volnum = NCP_FINFO(dir)->volNumber;
424 __le32 dirent = NCP_FINFO(dir)->dirEntNum;
425 int result;
426
427 if (target == NULL) {
428 printk(KERN_ERR "ncp_obtain_info: invalid call\n");
429 return -EINVAL;
430 }
431 ncp_init_request(server);
432 ncp_add_byte(server, 6); /* subfunction */
433 ncp_add_byte(server, server->name_space[volnum]);
434 ncp_add_byte(server, server->name_space[volnum]); /* N.B. twice ?? */
435 ncp_add_word(server, cpu_to_le16(0x8006)); /* get all */
436 ncp_add_dword(server, RIM_ALL);
437 ncp_add_handle_path(server, volnum, dirent, 1, path);
438
439 if ((result = ncp_request(server, 87)) != 0)
440 goto out;
441 ncp_extract_file_info(ncp_reply_data(server, 0), target);
442 ncp_unlock_server(server);
443
444 result = ncp_obtain_nfs_info(server, target);
445 return result;
446
447 out:
448 ncp_unlock_server(server);
449 return result;
450 }
451
452 #ifdef CONFIG_NCPFS_NFS_NS
453 static int
454 ncp_obtain_DOS_dir_base(struct ncp_server *server,
455 __u8 volnum, __le32 dirent,
456 char *path, /* At most 1 component */
457 __le32 *DOS_dir_base)
458 {
459 int result;
460
461 ncp_init_request(server);
462 ncp_add_byte(server, 6); /* subfunction */
463 ncp_add_byte(server, server->name_space[volnum]);
464 ncp_add_byte(server, server->name_space[volnum]);
465 ncp_add_word(server, cpu_to_le16(0x8006)); /* get all */
466 ncp_add_dword(server, RIM_DIRECTORY);
467 ncp_add_handle_path(server, volnum, dirent, 1, path);
468
469 if ((result = ncp_request(server, 87)) == 0)
470 {
471 if (DOS_dir_base) *DOS_dir_base=ncp_reply_dword(server, 0x34);
472 }
473 ncp_unlock_server(server);
474 return result;
475 }
476 #endif /* CONFIG_NCPFS_NFS_NS */
477
478 static inline int
479 ncp_get_known_namespace(struct ncp_server *server, __u8 volume)
480 {
481 #if defined(CONFIG_NCPFS_OS2_NS) || defined(CONFIG_NCPFS_NFS_NS)
482 int result;
483 __u8 *namespace;
484 __u16 no_namespaces;
485
486 ncp_init_request(server);
487 ncp_add_byte(server, 24); /* Subfunction: Get Name Spaces Loaded */
488 ncp_add_word(server, 0);
489 ncp_add_byte(server, volume);
490
491 if ((result = ncp_request(server, 87)) != 0) {
492 ncp_unlock_server(server);
493 return NW_NS_DOS; /* not result ?? */
494 }
495
496 result = NW_NS_DOS;
497 no_namespaces = ncp_reply_le16(server, 0);
498 namespace = ncp_reply_data(server, 2);
499
500 while (no_namespaces > 0) {
501 DPRINTK("get_namespaces: found %d on %d\n", *namespace, volume);
502
503 #ifdef CONFIG_NCPFS_NFS_NS
504 if ((*namespace == NW_NS_NFS) && !(server->m.flags&NCP_MOUNT_NO_NFS))
505 {
506 result = NW_NS_NFS;
507 break;
508 }
509 #endif /* CONFIG_NCPFS_NFS_NS */
510 #ifdef CONFIG_NCPFS_OS2_NS
511 if ((*namespace == NW_NS_OS2) && !(server->m.flags&NCP_MOUNT_NO_OS2))
512 {
513 result = NW_NS_OS2;
514 }
515 #endif /* CONFIG_NCPFS_OS2_NS */
516 namespace += 1;
517 no_namespaces -= 1;
518 }
519 ncp_unlock_server(server);
520 return result;
521 #else /* neither OS2 nor NFS - only DOS */
522 return NW_NS_DOS;
523 #endif /* defined(CONFIG_NCPFS_OS2_NS) || defined(CONFIG_NCPFS_NFS_NS) */
524 }
525
526 static int
527 ncp_ObtainSpecificDirBase(struct ncp_server *server,
528 __u8 nsSrc, __u8 nsDst, __u8 vol_num, __le32 dir_base,
529 char *path, /* At most 1 component */
530 __le32 *dirEntNum, __le32 *DosDirNum)
531 {
532 int result;
533
534 ncp_init_request(server);
535 ncp_add_byte(server, 6); /* subfunction */
536 ncp_add_byte(server, nsSrc);
537 ncp_add_byte(server, nsDst);
538 ncp_add_word(server, cpu_to_le16(0x8006)); /* get all */
539 ncp_add_dword(server, RIM_ALL);
540 ncp_add_handle_path(server, vol_num, dir_base, 1, path);
541
542 if ((result = ncp_request(server, 87)) != 0)
543 {
544 ncp_unlock_server(server);
545 return result;
546 }
547
548 if (dirEntNum)
549 *dirEntNum = ncp_reply_dword(server, 0x30);
550 if (DosDirNum)
551 *DosDirNum = ncp_reply_dword(server, 0x34);
552 ncp_unlock_server(server);
553 return 0;
554 }
555
556 int
557 ncp_mount_subdir(struct ncp_server *server,
558 __u8 volNumber, __u8 srcNS, __le32 dirEntNum,
559 __u32* volume, __le32* newDirEnt, __le32* newDosEnt)
560 {
561 int dstNS;
562 int result;
563
564 dstNS = ncp_get_known_namespace(server, volNumber);
565 if ((result = ncp_ObtainSpecificDirBase(server, srcNS, dstNS, volNumber,
566 dirEntNum, NULL, newDirEnt, newDosEnt)) != 0)
567 {
568 return result;
569 }
570 server->name_space[volNumber] = dstNS;
571 *volume = volNumber;
572 server->m.mounted_vol[1] = 0;
573 server->m.mounted_vol[0] = 'X';
574 return 0;
575 }
576
577 int
578 ncp_get_volume_root(struct ncp_server *server, const char *volname,
579 __u32* volume, __le32* dirent, __le32* dosdirent)
580 {
581 int result;
582 __u8 volnum;
583
584 DPRINTK("ncp_get_volume_root: looking up vol %s\n", volname);
585
586 ncp_init_request(server);
587 ncp_add_byte(server, 22); /* Subfunction: Generate dir handle */
588 ncp_add_byte(server, 0); /* DOS namespace */
589 ncp_add_byte(server, 0); /* reserved */
590 ncp_add_byte(server, 0); /* reserved */
591 ncp_add_byte(server, 0); /* reserved */
592
593 ncp_add_byte(server, 0); /* faked volume number */
594 ncp_add_dword(server, 0); /* faked dir_base */
595 ncp_add_byte(server, 0xff); /* Don't have a dir_base */
596 ncp_add_byte(server, 1); /* 1 path component */
597 ncp_add_pstring(server, volname);
598
599 if ((result = ncp_request(server, 87)) != 0) {
600 ncp_unlock_server(server);
601 return result;
602 }
603 *dirent = *dosdirent = ncp_reply_dword(server, 4);
604 volnum = ncp_reply_byte(server, 8);
605 ncp_unlock_server(server);
606 *volume = volnum;
607
608 server->name_space[volnum] = ncp_get_known_namespace(server, volnum);
609
610 DPRINTK("lookup_vol: namespace[%d] = %d\n",
611 volnum, server->name_space[volnum]);
612
613 return 0;
614 }
615
616 int
617 ncp_lookup_volume(struct ncp_server *server, const char *volname,
618 struct nw_info_struct *target)
619 {
620 int result;
621
622 memset(target, 0, sizeof(*target));
623 result = ncp_get_volume_root(server, volname,
624 &target->volNumber, &target->dirEntNum, &target->DosDirNum);
625 if (result) {
626 return result;
627 }
628 target->nameLen = strlen(volname);
629 memcpy(target->entryName, volname, target->nameLen+1);
630 target->attributes = aDIR;
631 /* set dates to Jan 1, 1986 00:00 */
632 target->creationTime = target->modifyTime = cpu_to_le16(0x0000);
633 target->creationDate = target->modifyDate = target->lastAccessDate = cpu_to_le16(0x0C21);
634 target->nfs.mode = 0;
635 return 0;
636 }
637
638 int ncp_modify_file_or_subdir_dos_info_path(struct ncp_server *server,
639 struct inode *dir,
640 const char *path,
641 __le32 info_mask,
642 const struct nw_modify_dos_info *info)
643 {
644 __u8 volnum = NCP_FINFO(dir)->volNumber;
645 __le32 dirent = NCP_FINFO(dir)->dirEntNum;
646 int result;
647
648 ncp_init_request(server);
649 ncp_add_byte(server, 7); /* subfunction */
650 ncp_add_byte(server, server->name_space[volnum]);
651 ncp_add_byte(server, 0); /* reserved */
652 ncp_add_word(server, cpu_to_le16(0x8006)); /* search attribs: all */
653
654 ncp_add_dword(server, info_mask);
655 ncp_add_mem(server, info, sizeof(*info));
656 ncp_add_handle_path(server, volnum, dirent, 1, path);
657
658 result = ncp_request(server, 87);
659 ncp_unlock_server(server);
660 return result;
661 }
662
663 int ncp_modify_file_or_subdir_dos_info(struct ncp_server *server,
664 struct inode *dir,
665 __le32 info_mask,
666 const struct nw_modify_dos_info *info)
667 {
668 return ncp_modify_file_or_subdir_dos_info_path(server, dir, NULL,
669 info_mask, info);
670 }
671
672 #ifdef CONFIG_NCPFS_NFS_NS
673 int ncp_modify_nfs_info(struct ncp_server *server, __u8 volnum, __le32 dirent,
674 __u32 mode, __u32 rdev)
675
676 {
677 int result = 0;
678
679 if (server->name_space[volnum] == NW_NS_NFS) {
680 ncp_init_request(server);
681 ncp_add_byte(server, 25); /* subfunction */
682 ncp_add_byte(server, server->name_space[volnum]);
683 ncp_add_byte(server, NW_NS_NFS);
684 ncp_add_byte(server, volnum);
685 ncp_add_dword(server, dirent);
686 /* we must always operate on both nlinks and rdev, otherwise
687 rdev is not set */
688 ncp_add_dword_lh(server, NSIBM_NFS_MODE | NSIBM_NFS_NLINKS | NSIBM_NFS_RDEV);
689 ncp_add_dword_lh(server, mode);
690 ncp_add_dword_lh(server, 1); /* nlinks */
691 ncp_add_dword_lh(server, rdev);
692 result = ncp_request(server, 87);
693 ncp_unlock_server(server);
694 }
695 return result;
696 }
697 #endif
698
699
700 static int
701 ncp_DeleteNSEntry(struct ncp_server *server,
702 __u8 have_dir_base, __u8 volnum, __le32 dirent,
703 char* name, __u8 ns, __le16 attr)
704 {
705 int result;
706
707 ncp_init_request(server);
708 ncp_add_byte(server, 8); /* subfunction */
709 ncp_add_byte(server, ns);
710 ncp_add_byte(server, 0); /* reserved */
711 ncp_add_word(server, attr); /* search attribs: all */
712 ncp_add_handle_path(server, volnum, dirent, have_dir_base, name);
713
714 result = ncp_request(server, 87);
715 ncp_unlock_server(server);
716 return result;
717 }
718
719 int
720 ncp_del_file_or_subdir2(struct ncp_server *server,
721 struct dentry *dentry)
722 {
723 struct inode *inode = dentry->d_inode;
724 __u8 volnum;
725 __le32 dirent;
726
727 if (!inode) {
728 return 0xFF; /* Any error */
729 }
730 volnum = NCP_FINFO(inode)->volNumber;
731 dirent = NCP_FINFO(inode)->DosDirNum;
732 return ncp_DeleteNSEntry(server, 1, volnum, dirent, NULL, NW_NS_DOS, cpu_to_le16(0x8006));
733 }
734
735 int
736 ncp_del_file_or_subdir(struct ncp_server *server,
737 struct inode *dir, char *name)
738 {
739 __u8 volnum = NCP_FINFO(dir)->volNumber;
740 __le32 dirent = NCP_FINFO(dir)->dirEntNum;
741
742 #ifdef CONFIG_NCPFS_NFS_NS
743 if (server->name_space[volnum]==NW_NS_NFS)
744 {
745 int result;
746
747 result=ncp_obtain_DOS_dir_base(server, volnum, dirent, name, &dirent);
748 if (result) return result;
749 return ncp_DeleteNSEntry(server, 1, volnum, dirent, NULL, NW_NS_DOS, cpu_to_le16(0x8006));
750 }
751 else
752 #endif /* CONFIG_NCPFS_NFS_NS */
753 return ncp_DeleteNSEntry(server, 1, volnum, dirent, name, server->name_space[volnum], cpu_to_le16(0x8006));
754 }
755
756 static inline void ConvertToNWfromDWORD(__u16 v0, __u16 v1, __u8 ret[6])
757 {
758 __le16 *dest = (__le16 *) ret;
759 dest[1] = cpu_to_le16(v0);
760 dest[2] = cpu_to_le16(v1);
761 dest[0] = cpu_to_le16(v0 + 1);
762 return;
763 }
764
765 /* If both dir and name are NULL, then in target there's already a
766 looked-up entry that wants to be opened. */
767 int ncp_open_create_file_or_subdir(struct ncp_server *server,
768 struct inode *dir, char *name,
769 int open_create_mode,
770 __le32 create_attributes,
771 __le16 desired_acc_rights,
772 struct ncp_entry_info *target)
773 {
774 __le16 search_attribs = cpu_to_le16(0x0006);
775 __u8 volnum;
776 __le32 dirent;
777 int result;
778
779 volnum = NCP_FINFO(dir)->volNumber;
780 dirent = NCP_FINFO(dir)->dirEntNum;
781
782 if ((create_attributes & aDIR) != 0) {
783 search_attribs |= cpu_to_le16(0x8000);
784 }
785 ncp_init_request(server);
786 ncp_add_byte(server, 1); /* subfunction */
787 ncp_add_byte(server, server->name_space[volnum]);
788 ncp_add_byte(server, open_create_mode);
789 ncp_add_word(server, search_attribs);
790 ncp_add_dword(server, RIM_ALL);
791 ncp_add_dword(server, create_attributes);
792 /* The desired acc rights seem to be the inherited rights mask
793 for directories */
794 ncp_add_word(server, desired_acc_rights);
795 ncp_add_handle_path(server, volnum, dirent, 1, name);
796
797 if ((result = ncp_request(server, 87)) != 0)
798 goto out;
799 if (!(create_attributes & aDIR))
800 target->opened = 1;
801
802 /* in target there's a new finfo to fill */
803 ncp_extract_file_info(ncp_reply_data(server, 6), &(target->i));
804 target->volume = target->i.volNumber;
805 ConvertToNWfromDWORD(ncp_reply_le16(server, 0),
806 ncp_reply_le16(server, 2),
807 target->file_handle);
808
809 ncp_unlock_server(server);
810
811 (void)ncp_obtain_nfs_info(server, &(target->i));
812 return 0;
813
814 out:
815 ncp_unlock_server(server);
816 return result;
817 }
818
819 int
820 ncp_initialize_search(struct ncp_server *server, struct inode *dir,
821 struct nw_search_sequence *target)
822 {
823 __u8 volnum = NCP_FINFO(dir)->volNumber;
824 __le32 dirent = NCP_FINFO(dir)->dirEntNum;
825 int result;
826
827 ncp_init_request(server);
828 ncp_add_byte(server, 2); /* subfunction */
829 ncp_add_byte(server, server->name_space[volnum]);
830 ncp_add_byte(server, 0); /* reserved */
831 ncp_add_handle_path(server, volnum, dirent, 1, NULL);
832
833 result = ncp_request(server, 87);
834 if (result)
835 goto out;
836 memcpy(target, ncp_reply_data(server, 0), sizeof(*target));
837
838 out:
839 ncp_unlock_server(server);
840 return result;
841 }
842
843 int ncp_search_for_fileset(struct ncp_server *server,
844 struct nw_search_sequence *seq,
845 int* more,
846 int* cnt,
847 char* buffer,
848 size_t bufsize,
849 char** rbuf,
850 size_t* rsize)
851 {
852 int result;
853
854 ncp_init_request(server);
855 ncp_add_byte(server, 20);
856 ncp_add_byte(server, server->name_space[seq->volNumber]);
857 ncp_add_byte(server, 0); /* datastream */
858 ncp_add_word(server, cpu_to_le16(0x8006));
859 ncp_add_dword(server, RIM_ALL);
860 ncp_add_word(server, cpu_to_le16(32767)); /* max returned items */
861 ncp_add_mem(server, seq, 9);
862 #ifdef CONFIG_NCPFS_NFS_NS
863 if (server->name_space[seq->volNumber] == NW_NS_NFS) {
864 ncp_add_byte(server, 0); /* 0 byte pattern */
865 } else
866 #endif
867 {
868 ncp_add_byte(server, 2); /* 2 byte pattern */
869 ncp_add_byte(server, 0xff); /* following is a wildcard */
870 ncp_add_byte(server, '*');
871 }
872 result = ncp_request2(server, 87, buffer, bufsize);
873 if (result) {
874 ncp_unlock_server(server);
875 return result;
876 }
877 if (server->ncp_reply_size < 12) {
878 ncp_unlock_server(server);
879 return 0xFF;
880 }
881 *rsize = server->ncp_reply_size - 12;
882 ncp_unlock_server(server);
883 buffer = buffer + sizeof(struct ncp_reply_header);
884 *rbuf = buffer + 12;
885 *cnt = WVAL_LH(buffer + 10);
886 *more = BVAL(buffer + 9);
887 memcpy(seq, buffer, 9);
888 return 0;
889 }
890
891 static int
892 ncp_RenameNSEntry(struct ncp_server *server,
893 struct inode *old_dir, char *old_name, __le16 old_type,
894 struct inode *new_dir, char *new_name)
895 {
896 int result = -EINVAL;
897
898 if ((old_dir == NULL) || (old_name == NULL) ||
899 (new_dir == NULL) || (new_name == NULL))
900 goto out;
901
902 ncp_init_request(server);
903 ncp_add_byte(server, 4); /* subfunction */
904 ncp_add_byte(server, server->name_space[NCP_FINFO(old_dir)->volNumber]);
905 ncp_add_byte(server, 1); /* rename flag */
906 ncp_add_word(server, old_type); /* search attributes */
907
908 /* source Handle Path */
909 ncp_add_byte(server, NCP_FINFO(old_dir)->volNumber);
910 ncp_add_dword(server, NCP_FINFO(old_dir)->dirEntNum);
911 ncp_add_byte(server, 1);
912 ncp_add_byte(server, 1); /* 1 source component */
913
914 /* dest Handle Path */
915 ncp_add_byte(server, NCP_FINFO(new_dir)->volNumber);
916 ncp_add_dword(server, NCP_FINFO(new_dir)->dirEntNum);
917 ncp_add_byte(server, 1);
918 ncp_add_byte(server, 1); /* 1 destination component */
919
920 /* source path string */
921 ncp_add_pstring(server, old_name);
922 /* dest path string */
923 ncp_add_pstring(server, new_name);
924
925 result = ncp_request(server, 87);
926 ncp_unlock_server(server);
927 out:
928 return result;
929 }
930
931 int ncp_ren_or_mov_file_or_subdir(struct ncp_server *server,
932 struct inode *old_dir, char *old_name,
933 struct inode *new_dir, char *new_name)
934 {
935 int result;
936 __le16 old_type = cpu_to_le16(0x06);
937
938 /* If somebody can do it atomic, call me... vandrove@vc.cvut.cz */
939 result = ncp_RenameNSEntry(server, old_dir, old_name, old_type,
940 new_dir, new_name);
941 if (result == 0xFF) /* File Not Found, try directory */
942 {
943 old_type = cpu_to_le16(0x16);
944 result = ncp_RenameNSEntry(server, old_dir, old_name, old_type,
945 new_dir, new_name);
946 }
947 if (result != 0x92) return result; /* All except NO_FILES_RENAMED */
948 result = ncp_del_file_or_subdir(server, new_dir, new_name);
949 if (result != 0) return -EACCES;
950 result = ncp_RenameNSEntry(server, old_dir, old_name, old_type,
951 new_dir, new_name);
952 return result;
953 }
954
955
956 /* We have to transfer to/from user space */
957 int
958 ncp_read_kernel(struct ncp_server *server, const char *file_id,
959 __u32 offset, __u16 to_read, char *target, int *bytes_read)
960 {
961 char *source;
962 int result;
963
964 ncp_init_request(server);
965 ncp_add_byte(server, 0);
966 ncp_add_mem(server, file_id, 6);
967 ncp_add_be32(server, offset);
968 ncp_add_be16(server, to_read);
969
970 if ((result = ncp_request(server, 72)) != 0) {
971 goto out;
972 }
973 *bytes_read = ncp_reply_be16(server, 0);
974 source = ncp_reply_data(server, 2 + (offset & 1));
975
976 memcpy(target, source, *bytes_read);
977 out:
978 ncp_unlock_server(server);
979 return result;
980 }
981
982 /* There is a problem... egrep and some other silly tools do:
983 x = mmap(NULL, MAP_PRIVATE, PROT_READ|PROT_WRITE, <ncpfs fd>, 32768);
984 read(<ncpfs fd>, x, 32768);
985 Now copying read result by copy_to_user causes pagefault. This pagefault
986 could not be handled because of server was locked due to read. So we have
987 to use temporary buffer. So ncp_unlock_server must be done before
988 copy_to_user (and for write, copy_from_user must be done before
989 ncp_init_request... same applies for send raw packet ioctl). Because of
990 file is normally read in bigger chunks, caller provides kmalloced
991 (vmalloced) chunk of memory with size >= to_read...
992 */
993 int
994 ncp_read_bounce(struct ncp_server *server, const char *file_id,
995 __u32 offset, __u16 to_read, char __user *target, int *bytes_read,
996 void* bounce, __u32 bufsize)
997 {
998 int result;
999
1000 ncp_init_request(server);
1001 ncp_add_byte(server, 0);
1002 ncp_add_mem(server, file_id, 6);
1003 ncp_add_be32(server, offset);
1004 ncp_add_be16(server, to_read);
1005 result = ncp_request2(server, 72, bounce, bufsize);
1006 ncp_unlock_server(server);
1007 if (!result) {
1008 int len = get_unaligned_be16((char *)bounce +
1009 sizeof(struct ncp_reply_header));
1010 result = -EIO;
1011 if (len <= to_read) {
1012 char* source;
1013
1014 source = (char*)bounce +
1015 sizeof(struct ncp_reply_header) + 2 +
1016 (offset & 1);
1017 *bytes_read = len;
1018 result = 0;
1019 if (copy_to_user(target, source, len))
1020 result = -EFAULT;
1021 }
1022 }
1023 return result;
1024 }
1025
1026 int
1027 ncp_write_kernel(struct ncp_server *server, const char *file_id,
1028 __u32 offset, __u16 to_write,
1029 const char *source, int *bytes_written)
1030 {
1031 int result;
1032
1033 ncp_init_request(server);
1034 ncp_add_byte(server, 0);
1035 ncp_add_mem(server, file_id, 6);
1036 ncp_add_be32(server, offset);
1037 ncp_add_be16(server, to_write);
1038 ncp_add_mem(server, source, to_write);
1039
1040 if ((result = ncp_request(server, 73)) == 0)
1041 *bytes_written = to_write;
1042 ncp_unlock_server(server);
1043 return result;
1044 }
1045
1046 #ifdef CONFIG_NCPFS_IOCTL_LOCKING
1047 int
1048 ncp_LogPhysicalRecord(struct ncp_server *server, const char *file_id,
1049 __u8 locktype, __u32 offset, __u32 length, __u16 timeout)
1050 {
1051 int result;
1052
1053 ncp_init_request(server);
1054 ncp_add_byte(server, locktype);
1055 ncp_add_mem(server, file_id, 6);
1056 ncp_add_be32(server, offset);
1057 ncp_add_be32(server, length);
1058 ncp_add_be16(server, timeout);
1059
1060 if ((result = ncp_request(server, 0x1A)) != 0)
1061 {
1062 ncp_unlock_server(server);
1063 return result;
1064 }
1065 ncp_unlock_server(server);
1066 return 0;
1067 }
1068
1069 int
1070 ncp_ClearPhysicalRecord(struct ncp_server *server, const char *file_id,
1071 __u32 offset, __u32 length)
1072 {
1073 int result;
1074
1075 ncp_init_request(server);
1076 ncp_add_byte(server, 0); /* who knows... lanalyzer says that */
1077 ncp_add_mem(server, file_id, 6);
1078 ncp_add_be32(server, offset);
1079 ncp_add_be32(server, length);
1080
1081 if ((result = ncp_request(server, 0x1E)) != 0)
1082 {
1083 ncp_unlock_server(server);
1084 return result;
1085 }
1086 ncp_unlock_server(server);
1087 return 0;
1088 }
1089 #endif /* CONFIG_NCPFS_IOCTL_LOCKING */
1090
1091 #ifdef CONFIG_NCPFS_NLS
1092 /* This are the NLS conversion routines with inspirations and code parts
1093 * from the vfat file system and hints from Petr Vandrovec.
1094 */
1095
1096 int
1097 ncp__io2vol(struct ncp_server *server, unsigned char *vname, unsigned int *vlen,
1098 const unsigned char *iname, unsigned int ilen, int cc)
1099 {
1100 struct nls_table *in = server->nls_io;
1101 struct nls_table *out = server->nls_vol;
1102 unsigned char *vname_start;
1103 unsigned char *vname_end;
1104 const unsigned char *iname_end;
1105
1106 iname_end = iname + ilen;
1107 vname_start = vname;
1108 vname_end = vname + *vlen - 1;
1109
1110 while (iname < iname_end) {
1111 int chl;
1112 wchar_t ec;
1113
1114 if (NCP_IS_FLAG(server, NCP_FLAG_UTF8)) {
1115 int k;
1116
1117 k = utf8_mbtowc(&ec, iname, iname_end - iname);
1118 if (k < 0)
1119 return -EINVAL;
1120 iname += k;
1121 } else {
1122 if (*iname == NCP_ESC) {
1123 int k;
1124
1125 if (iname_end - iname < 5)
1126 goto nospec;
1127
1128 ec = 0;
1129 for (k = 1; k < 5; k++) {
1130 unsigned char nc;
1131
1132 nc = iname[k] - '0';
1133 if (nc >= 10) {
1134 nc -= 'A' - '0' - 10;
1135 if ((nc < 10) || (nc > 15)) {
1136 goto nospec;
1137 }
1138 }
1139 ec = (ec << 4) | nc;
1140 }
1141 iname += 5;
1142 } else {
1143 nospec:;
1144 if ( (chl = in->char2uni(iname, iname_end - iname, &ec)) < 0)
1145 return chl;
1146 iname += chl;
1147 }
1148 }
1149
1150 /* unitoupper should be here! */
1151
1152 chl = out->uni2char(ec, vname, vname_end - vname);
1153 if (chl < 0)
1154 return chl;
1155
1156 /* this is wrong... */
1157 if (cc) {
1158 int chi;
1159
1160 for (chi = 0; chi < chl; chi++){
1161 vname[chi] = ncp_toupper(out, vname[chi]);
1162 }
1163 }
1164 vname += chl;
1165 }
1166
1167 *vname = 0;
1168 *vlen = vname - vname_start;
1169 return 0;
1170 }
1171
1172 int
1173 ncp__vol2io(struct ncp_server *server, unsigned char *iname, unsigned int *ilen,
1174 const unsigned char *vname, unsigned int vlen, int cc)
1175 {
1176 struct nls_table *in = server->nls_vol;
1177 struct nls_table *out = server->nls_io;
1178 const unsigned char *vname_end;
1179 unsigned char *iname_start;
1180 unsigned char *iname_end;
1181 unsigned char *vname_cc;
1182 int err;
1183
1184 vname_cc = NULL;
1185
1186 if (cc) {
1187 int i;
1188
1189 /* this is wrong! */
1190 vname_cc = kmalloc(vlen, GFP_KERNEL);
1191 if (!vname_cc)
1192 return -ENOMEM;
1193 for (i = 0; i < vlen; i++)
1194 vname_cc[i] = ncp_tolower(in, vname[i]);
1195 vname = vname_cc;
1196 }
1197
1198 iname_start = iname;
1199 iname_end = iname + *ilen - 1;
1200 vname_end = vname + vlen;
1201
1202 while (vname < vname_end) {
1203 wchar_t ec;
1204 int chl;
1205
1206 if ( (chl = in->char2uni(vname, vname_end - vname, &ec)) < 0) {
1207 err = chl;
1208 goto quit;
1209 }
1210 vname += chl;
1211
1212 /* unitolower should be here! */
1213
1214 if (NCP_IS_FLAG(server, NCP_FLAG_UTF8)) {
1215 int k;
1216
1217 k = utf8_wctomb(iname, ec, iname_end - iname);
1218 if (k < 0) {
1219 err = -ENAMETOOLONG;
1220 goto quit;
1221 }
1222 iname += k;
1223 } else {
1224 if ( (chl = out->uni2char(ec, iname, iname_end - iname)) >= 0) {
1225 iname += chl;
1226 } else {
1227 int k;
1228
1229 if (iname_end - iname < 5) {
1230 err = -ENAMETOOLONG;
1231 goto quit;
1232 }
1233 *iname = NCP_ESC;
1234 for (k = 4; k > 0; k--) {
1235 unsigned char v;
1236
1237 v = (ec & 0xF) + '0';
1238 if (v > '9') {
1239 v += 'A' - '9' - 1;
1240 }
1241 iname[k] = v;
1242 ec >>= 4;
1243 }
1244 iname += 5;
1245 }
1246 }
1247 }
1248
1249 *iname = 0;
1250 *ilen = iname - iname_start;
1251 err = 0;
1252 quit:;
1253 if (cc)
1254 kfree(vname_cc);
1255 return err;
1256 }
1257
1258 #else
1259
1260 int
1261 ncp__io2vol(unsigned char *vname, unsigned int *vlen,
1262 const unsigned char *iname, unsigned int ilen, int cc)
1263 {
1264 int i;
1265
1266 if (*vlen <= ilen)
1267 return -ENAMETOOLONG;
1268
1269 if (cc)
1270 for (i = 0; i < ilen; i++) {
1271 *vname = toupper(*iname);
1272 vname++;
1273 iname++;
1274 }
1275 else {
1276 memmove(vname, iname, ilen);
1277 vname += ilen;
1278 }
1279
1280 *vlen = ilen;
1281 *vname = 0;
1282 return 0;
1283 }
1284
1285 int
1286 ncp__vol2io(unsigned char *iname, unsigned int *ilen,
1287 const unsigned char *vname, unsigned int vlen, int cc)
1288 {
1289 int i;
1290
1291 if (*ilen <= vlen)
1292 return -ENAMETOOLONG;
1293
1294 if (cc)
1295 for (i = 0; i < vlen; i++) {
1296 *iname = tolower(*vname);
1297 iname++;
1298 vname++;
1299 }
1300 else {
1301 memmove(iname, vname, vlen);
1302 iname += vlen;
1303 }
1304
1305 *ilen = vlen;
1306 *iname = 0;
1307 return 0;
1308 }
1309
1310 #endif