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KVM guest: prevent tracing recursion with kvmclock
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / fs / ncpfs / ncplib_kernel.c
blob981a95617fc9fbcbd58051f6064aa7a757ac1c04
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 "ncp_fs.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(const void *data)
111 {
112 return *(const u8 *)data;
113 }
114
115 static u8 ncp_reply_byte(struct ncp_server *server, int offset)
116 {
117 return *(const u8 *)ncp_reply_data(server, offset);
118 }
119
120 static inline u16 WVAL_LH(const 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(const 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(const void *structure, struct nw_info_struct *target)
353 {
354 const __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(const 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, const 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 ns, __u8 volnum, __le32 dirent,
456 const 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, ns);
464 ncp_add_byte(server, ns);
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 int
527 ncp_update_known_namespace(struct ncp_server *server, __u8 volume, int *ret_ns)
528 {
529 int ns = ncp_get_known_namespace(server, volume);
530
531 if (ret_ns)
532 *ret_ns = ns;
533
534 DPRINTK("lookup_vol: namespace[%d] = %d\n",
535 volume, server->name_space[volume]);
536
537 if (server->name_space[volume] == ns)
538 return 0;
539 server->name_space[volume] = ns;
540 return 1;
541 }
542
543 static int
544 ncp_ObtainSpecificDirBase(struct ncp_server *server,
545 __u8 nsSrc, __u8 nsDst, __u8 vol_num, __le32 dir_base,
546 const char *path, /* At most 1 component */
547 __le32 *dirEntNum, __le32 *DosDirNum)
548 {
549 int result;
550
551 ncp_init_request(server);
552 ncp_add_byte(server, 6); /* subfunction */
553 ncp_add_byte(server, nsSrc);
554 ncp_add_byte(server, nsDst);
555 ncp_add_word(server, cpu_to_le16(0x8006)); /* get all */
556 ncp_add_dword(server, RIM_ALL);
557 ncp_add_handle_path(server, vol_num, dir_base, 1, path);
558
559 if ((result = ncp_request(server, 87)) != 0)
560 {
561 ncp_unlock_server(server);
562 return result;
563 }
564
565 if (dirEntNum)
566 *dirEntNum = ncp_reply_dword(server, 0x30);
567 if (DosDirNum)
568 *DosDirNum = ncp_reply_dword(server, 0x34);
569 ncp_unlock_server(server);
570 return 0;
571 }
572
573 int
574 ncp_mount_subdir(struct ncp_server *server,
575 __u8 volNumber, __u8 srcNS, __le32 dirEntNum,
576 __u32* volume, __le32* newDirEnt, __le32* newDosEnt)
577 {
578 int dstNS;
579 int result;
580
581 ncp_update_known_namespace(server, volNumber, &dstNS);
582 if ((result = ncp_ObtainSpecificDirBase(server, srcNS, dstNS, volNumber,
583 dirEntNum, NULL, newDirEnt, newDosEnt)) != 0)
584 {
585 return result;
586 }
587 *volume = volNumber;
588 server->m.mounted_vol[1] = 0;
589 server->m.mounted_vol[0] = 'X';
590 return 0;
591 }
592
593 int
594 ncp_get_volume_root(struct ncp_server *server,
595 const char *volname, __u32* volume, __le32* dirent, __le32* dosdirent)
596 {
597 int result;
598
599 DPRINTK("ncp_get_volume_root: looking up vol %s\n", volname);
600
601 ncp_init_request(server);
602 ncp_add_byte(server, 22); /* Subfunction: Generate dir handle */
603 ncp_add_byte(server, 0); /* DOS namespace */
604 ncp_add_byte(server, 0); /* reserved */
605 ncp_add_byte(server, 0); /* reserved */
606 ncp_add_byte(server, 0); /* reserved */
607
608 ncp_add_byte(server, 0); /* faked volume number */
609 ncp_add_dword(server, 0); /* faked dir_base */
610 ncp_add_byte(server, 0xff); /* Don't have a dir_base */
611 ncp_add_byte(server, 1); /* 1 path component */
612 ncp_add_pstring(server, volname);
613
614 if ((result = ncp_request(server, 87)) != 0) {
615 ncp_unlock_server(server);
616 return result;
617 }
618 *dirent = *dosdirent = ncp_reply_dword(server, 4);
619 *volume = ncp_reply_byte(server, 8);
620 ncp_unlock_server(server);
621 return 0;
622 }
623
624 int
625 ncp_lookup_volume(struct ncp_server *server,
626 const char *volname, struct nw_info_struct *target)
627 {
628 int result;
629
630 memset(target, 0, sizeof(*target));
631 result = ncp_get_volume_root(server, volname,
632 &target->volNumber, &target->dirEntNum, &target->DosDirNum);
633 if (result) {
634 return result;
635 }
636 ncp_update_known_namespace(server, target->volNumber, NULL);
637 target->nameLen = strlen(volname);
638 memcpy(target->entryName, volname, target->nameLen+1);
639 target->attributes = aDIR;
640 /* set dates to Jan 1, 1986 00:00 */
641 target->creationTime = target->modifyTime = cpu_to_le16(0x0000);
642 target->creationDate = target->modifyDate = target->lastAccessDate = cpu_to_le16(0x0C21);
643 target->nfs.mode = 0;
644 return 0;
645 }
646
647 int ncp_modify_file_or_subdir_dos_info_path(struct ncp_server *server,
648 struct inode *dir,
649 const char *path,
650 __le32 info_mask,
651 const struct nw_modify_dos_info *info)
652 {
653 __u8 volnum = NCP_FINFO(dir)->volNumber;
654 __le32 dirent = NCP_FINFO(dir)->dirEntNum;
655 int result;
656
657 ncp_init_request(server);
658 ncp_add_byte(server, 7); /* subfunction */
659 ncp_add_byte(server, server->name_space[volnum]);
660 ncp_add_byte(server, 0); /* reserved */
661 ncp_add_word(server, cpu_to_le16(0x8006)); /* search attribs: all */
662
663 ncp_add_dword(server, info_mask);
664 ncp_add_mem(server, info, sizeof(*info));
665 ncp_add_handle_path(server, volnum, dirent, 1, path);
666
667 result = ncp_request(server, 87);
668 ncp_unlock_server(server);
669 return result;
670 }
671
672 int ncp_modify_file_or_subdir_dos_info(struct ncp_server *server,
673 struct inode *dir,
674 __le32 info_mask,
675 const struct nw_modify_dos_info *info)
676 {
677 return ncp_modify_file_or_subdir_dos_info_path(server, dir, NULL,
678 info_mask, info);
679 }
680
681 #ifdef CONFIG_NCPFS_NFS_NS
682 int ncp_modify_nfs_info(struct ncp_server *server, __u8 volnum, __le32 dirent,
683 __u32 mode, __u32 rdev)
684
685 {
686 int result = 0;
687
688 ncp_init_request(server);
689 if (server->name_space[volnum] == NW_NS_NFS) {
690 ncp_add_byte(server, 25); /* subfunction */
691 ncp_add_byte(server, server->name_space[volnum]);
692 ncp_add_byte(server, NW_NS_NFS);
693 ncp_add_byte(server, volnum);
694 ncp_add_dword(server, dirent);
695 /* we must always operate on both nlinks and rdev, otherwise
696 rdev is not set */
697 ncp_add_dword_lh(server, NSIBM_NFS_MODE | NSIBM_NFS_NLINKS | NSIBM_NFS_RDEV);
698 ncp_add_dword_lh(server, mode);
699 ncp_add_dword_lh(server, 1); /* nlinks */
700 ncp_add_dword_lh(server, rdev);
701 result = ncp_request(server, 87);
702 }
703 ncp_unlock_server(server);
704 return result;
705 }
706 #endif
707
708
709 static int
710 ncp_DeleteNSEntry(struct ncp_server *server,
711 __u8 have_dir_base, __u8 volnum, __le32 dirent,
712 const char* name, __u8 ns, __le16 attr)
713 {
714 int result;
715
716 ncp_init_request(server);
717 ncp_add_byte(server, 8); /* subfunction */
718 ncp_add_byte(server, ns);
719 ncp_add_byte(server, 0); /* reserved */
720 ncp_add_word(server, attr); /* search attribs: all */
721 ncp_add_handle_path(server, volnum, dirent, have_dir_base, name);
722
723 result = ncp_request(server, 87);
724 ncp_unlock_server(server);
725 return result;
726 }
727
728 int
729 ncp_del_file_or_subdir2(struct ncp_server *server,
730 struct dentry *dentry)
731 {
732 struct inode *inode = dentry->d_inode;
733 __u8 volnum;
734 __le32 dirent;
735
736 if (!inode) {
737 return 0xFF; /* Any error */
738 }
739 volnum = NCP_FINFO(inode)->volNumber;
740 dirent = NCP_FINFO(inode)->DosDirNum;
741 return ncp_DeleteNSEntry(server, 1, volnum, dirent, NULL, NW_NS_DOS, cpu_to_le16(0x8006));
742 }
743
744 int
745 ncp_del_file_or_subdir(struct ncp_server *server,
746 struct inode *dir, const char *name)
747 {
748 __u8 volnum = NCP_FINFO(dir)->volNumber;
749 __le32 dirent = NCP_FINFO(dir)->dirEntNum;
750 int name_space;
751
752 name_space = server->name_space[volnum];
753 #ifdef CONFIG_NCPFS_NFS_NS
754 if (name_space == NW_NS_NFS)
755 {
756 int result;
757
758 result=ncp_obtain_DOS_dir_base(server, name_space, volnum, dirent, name, &dirent);
759 if (result) return result;
760 name = NULL;
761 name_space = NW_NS_DOS;
762 }
763 #endif /* CONFIG_NCPFS_NFS_NS */
764 return ncp_DeleteNSEntry(server, 1, volnum, dirent, name, name_space, cpu_to_le16(0x8006));
765 }
766
767 static inline void ConvertToNWfromDWORD(__u16 v0, __u16 v1, __u8 ret[6])
768 {
769 __le16 *dest = (__le16 *) ret;
770 dest[1] = cpu_to_le16(v0);
771 dest[2] = cpu_to_le16(v1);
772 dest[0] = cpu_to_le16(v0 + 1);
773 return;
774 }
775
776 /* If both dir and name are NULL, then in target there's already a
777 looked-up entry that wants to be opened. */
778 int ncp_open_create_file_or_subdir(struct ncp_server *server,
779 struct inode *dir, const char *name,
780 int open_create_mode,
781 __le32 create_attributes,
782 __le16 desired_acc_rights,
783 struct ncp_entry_info *target)
784 {
785 __le16 search_attribs = cpu_to_le16(0x0006);
786 __u8 volnum;
787 __le32 dirent;
788 int result;
789
790 volnum = NCP_FINFO(dir)->volNumber;
791 dirent = NCP_FINFO(dir)->dirEntNum;
792
793 if ((create_attributes & aDIR) != 0) {
794 search_attribs |= cpu_to_le16(0x8000);
795 }
796 ncp_init_request(server);
797 ncp_add_byte(server, 1); /* subfunction */
798 ncp_add_byte(server, server->name_space[volnum]);
799 ncp_add_byte(server, open_create_mode);
800 ncp_add_word(server, search_attribs);
801 ncp_add_dword(server, RIM_ALL);
802 ncp_add_dword(server, create_attributes);
803 /* The desired acc rights seem to be the inherited rights mask
804 for directories */
805 ncp_add_word(server, desired_acc_rights);
806 ncp_add_handle_path(server, volnum, dirent, 1, name);
807
808 if ((result = ncp_request(server, 87)) != 0)
809 goto out;
810 if (!(create_attributes & aDIR))
811 target->opened = 1;
812
813 /* in target there's a new finfo to fill */
814 ncp_extract_file_info(ncp_reply_data(server, 6), &(target->i));
815 target->volume = target->i.volNumber;
816 ConvertToNWfromDWORD(ncp_reply_le16(server, 0),
817 ncp_reply_le16(server, 2),
818 target->file_handle);
819
820 ncp_unlock_server(server);
821
822 (void)ncp_obtain_nfs_info(server, &(target->i));
823 return 0;
824
825 out:
826 ncp_unlock_server(server);
827 return result;
828 }
829
830 int
831 ncp_initialize_search(struct ncp_server *server, struct inode *dir,
832 struct nw_search_sequence *target)
833 {
834 __u8 volnum = NCP_FINFO(dir)->volNumber;
835 __le32 dirent = NCP_FINFO(dir)->dirEntNum;
836 int result;
837
838 ncp_init_request(server);
839 ncp_add_byte(server, 2); /* subfunction */
840 ncp_add_byte(server, server->name_space[volnum]);
841 ncp_add_byte(server, 0); /* reserved */
842 ncp_add_handle_path(server, volnum, dirent, 1, NULL);
843
844 result = ncp_request(server, 87);
845 if (result)
846 goto out;
847 memcpy(target, ncp_reply_data(server, 0), sizeof(*target));
848
849 out:
850 ncp_unlock_server(server);
851 return result;
852 }
853
854 int ncp_search_for_fileset(struct ncp_server *server,
855 struct nw_search_sequence *seq,
856 int* more,
857 int* cnt,
858 char* buffer,
859 size_t bufsize,
860 char** rbuf,
861 size_t* rsize)
862 {
863 int result;
864
865 ncp_init_request(server);
866 ncp_add_byte(server, 20);
867 ncp_add_byte(server, server->name_space[seq->volNumber]);
868 ncp_add_byte(server, 0); /* datastream */
869 ncp_add_word(server, cpu_to_le16(0x8006));
870 ncp_add_dword(server, RIM_ALL);
871 ncp_add_word(server, cpu_to_le16(32767)); /* max returned items */
872 ncp_add_mem(server, seq, 9);
873 #ifdef CONFIG_NCPFS_NFS_NS
874 if (server->name_space[seq->volNumber] == NW_NS_NFS) {
875 ncp_add_byte(server, 0); /* 0 byte pattern */
876 } else
877 #endif
878 {
879 ncp_add_byte(server, 2); /* 2 byte pattern */
880 ncp_add_byte(server, 0xff); /* following is a wildcard */
881 ncp_add_byte(server, '*');
882 }
883 result = ncp_request2(server, 87, buffer, bufsize);
884 if (result) {
885 ncp_unlock_server(server);
886 return result;
887 }
888 if (server->ncp_reply_size < 12) {
889 ncp_unlock_server(server);
890 return 0xFF;
891 }
892 *rsize = server->ncp_reply_size - 12;
893 ncp_unlock_server(server);
894 buffer = buffer + sizeof(struct ncp_reply_header);
895 *rbuf = buffer + 12;
896 *cnt = WVAL_LH(buffer + 10);
897 *more = BVAL(buffer + 9);
898 memcpy(seq, buffer, 9);
899 return 0;
900 }
901
902 static int
903 ncp_RenameNSEntry(struct ncp_server *server,
904 struct inode *old_dir, const char *old_name, __le16 old_type,
905 struct inode *new_dir, const char *new_name)
906 {
907 int result = -EINVAL;
908
909 if ((old_dir == NULL) || (old_name == NULL) ||
910 (new_dir == NULL) || (new_name == NULL))
911 goto out;
912
913 ncp_init_request(server);
914 ncp_add_byte(server, 4); /* subfunction */
915 ncp_add_byte(server, server->name_space[NCP_FINFO(old_dir)->volNumber]);
916 ncp_add_byte(server, 1); /* rename flag */
917 ncp_add_word(server, old_type); /* search attributes */
918
919 /* source Handle Path */
920 ncp_add_byte(server, NCP_FINFO(old_dir)->volNumber);
921 ncp_add_dword(server, NCP_FINFO(old_dir)->dirEntNum);
922 ncp_add_byte(server, 1);
923 ncp_add_byte(server, 1); /* 1 source component */
924
925 /* dest Handle Path */
926 ncp_add_byte(server, NCP_FINFO(new_dir)->volNumber);
927 ncp_add_dword(server, NCP_FINFO(new_dir)->dirEntNum);
928 ncp_add_byte(server, 1);
929 ncp_add_byte(server, 1); /* 1 destination component */
930
931 /* source path string */
932 ncp_add_pstring(server, old_name);
933 /* dest path string */
934 ncp_add_pstring(server, new_name);
935
936 result = ncp_request(server, 87);
937 ncp_unlock_server(server);
938 out:
939 return result;
940 }
941
942 int ncp_ren_or_mov_file_or_subdir(struct ncp_server *server,
943 struct inode *old_dir, const char *old_name,
944 struct inode *new_dir, const char *new_name)
945 {
946 int result;
947 __le16 old_type = cpu_to_le16(0x06);
948
949 /* If somebody can do it atomic, call me... vandrove@vc.cvut.cz */
950 result = ncp_RenameNSEntry(server, old_dir, old_name, old_type,
951 new_dir, new_name);
952 if (result == 0xFF) /* File Not Found, try directory */
953 {
954 old_type = cpu_to_le16(0x16);
955 result = ncp_RenameNSEntry(server, old_dir, old_name, old_type,
956 new_dir, new_name);
957 }
958 if (result != 0x92) return result; /* All except NO_FILES_RENAMED */
959 result = ncp_del_file_or_subdir(server, new_dir, new_name);
960 if (result != 0) return -EACCES;
961 result = ncp_RenameNSEntry(server, old_dir, old_name, old_type,
962 new_dir, new_name);
963 return result;
964 }
965
966
967 /* We have to transfer to/from user space */
968 int
969 ncp_read_kernel(struct ncp_server *server, const char *file_id,
970 __u32 offset, __u16 to_read, char *target, int *bytes_read)
971 {
972 const char *source;
973 int result;
974
975 ncp_init_request(server);
976 ncp_add_byte(server, 0);
977 ncp_add_mem(server, file_id, 6);
978 ncp_add_be32(server, offset);
979 ncp_add_be16(server, to_read);
980
981 if ((result = ncp_request(server, 72)) != 0) {
982 goto out;
983 }
984 *bytes_read = ncp_reply_be16(server, 0);
985 source = ncp_reply_data(server, 2 + (offset & 1));
986
987 memcpy(target, source, *bytes_read);
988 out:
989 ncp_unlock_server(server);
990 return result;
991 }
992
993 /* There is a problem... egrep and some other silly tools do:
994 x = mmap(NULL, MAP_PRIVATE, PROT_READ|PROT_WRITE, <ncpfs fd>, 32768);
995 read(<ncpfs fd>, x, 32768);
996 Now copying read result by copy_to_user causes pagefault. This pagefault
997 could not be handled because of server was locked due to read. So we have
998 to use temporary buffer. So ncp_unlock_server must be done before
999 copy_to_user (and for write, copy_from_user must be done before
1000 ncp_init_request... same applies for send raw packet ioctl). Because of
1001 file is normally read in bigger chunks, caller provides kmalloced
1002 (vmalloced) chunk of memory with size >= to_read...
1003 */
1004 int
1005 ncp_read_bounce(struct ncp_server *server, const char *file_id,
1006 __u32 offset, __u16 to_read, char __user *target, int *bytes_read,
1007 void* bounce, __u32 bufsize)
1008 {
1009 int result;
1010
1011 ncp_init_request(server);
1012 ncp_add_byte(server, 0);
1013 ncp_add_mem(server, file_id, 6);
1014 ncp_add_be32(server, offset);
1015 ncp_add_be16(server, to_read);
1016 result = ncp_request2(server, 72, bounce, bufsize);
1017 ncp_unlock_server(server);
1018 if (!result) {
1019 int len = get_unaligned_be16((char *)bounce +
1020 sizeof(struct ncp_reply_header));
1021 result = -EIO;
1022 if (len <= to_read) {
1023 char* source;
1024
1025 source = (char*)bounce +
1026 sizeof(struct ncp_reply_header) + 2 +
1027 (offset & 1);
1028 *bytes_read = len;
1029 result = 0;
1030 if (copy_to_user(target, source, len))
1031 result = -EFAULT;
1032 }
1033 }
1034 return result;
1035 }
1036
1037 int
1038 ncp_write_kernel(struct ncp_server *server, const char *file_id,
1039 __u32 offset, __u16 to_write,
1040 const char *source, int *bytes_written)
1041 {
1042 int result;
1043
1044 ncp_init_request(server);
1045 ncp_add_byte(server, 0);
1046 ncp_add_mem(server, file_id, 6);
1047 ncp_add_be32(server, offset);
1048 ncp_add_be16(server, to_write);
1049 ncp_add_mem(server, source, to_write);
1050
1051 if ((result = ncp_request(server, 73)) == 0)
1052 *bytes_written = to_write;
1053 ncp_unlock_server(server);
1054 return result;
1055 }
1056
1057 #ifdef CONFIG_NCPFS_IOCTL_LOCKING
1058 int
1059 ncp_LogPhysicalRecord(struct ncp_server *server, const char *file_id,
1060 __u8 locktype, __u32 offset, __u32 length, __u16 timeout)
1061 {
1062 int result;
1063
1064 ncp_init_request(server);
1065 ncp_add_byte(server, locktype);
1066 ncp_add_mem(server, file_id, 6);
1067 ncp_add_be32(server, offset);
1068 ncp_add_be32(server, length);
1069 ncp_add_be16(server, timeout);
1070
1071 if ((result = ncp_request(server, 0x1A)) != 0)
1072 {
1073 ncp_unlock_server(server);
1074 return result;
1075 }
1076 ncp_unlock_server(server);
1077 return 0;
1078 }
1079
1080 int
1081 ncp_ClearPhysicalRecord(struct ncp_server *server, const char *file_id,
1082 __u32 offset, __u32 length)
1083 {
1084 int result;
1085
1086 ncp_init_request(server);
1087 ncp_add_byte(server, 0); /* who knows... lanalyzer says that */
1088 ncp_add_mem(server, file_id, 6);
1089 ncp_add_be32(server, offset);
1090 ncp_add_be32(server, length);
1091
1092 if ((result = ncp_request(server, 0x1E)) != 0)
1093 {
1094 ncp_unlock_server(server);
1095 return result;
1096 }
1097 ncp_unlock_server(server);
1098 return 0;
1099 }
1100 #endif /* CONFIG_NCPFS_IOCTL_LOCKING */
1101
1102 #ifdef CONFIG_NCPFS_NLS
1103 /* This are the NLS conversion routines with inspirations and code parts
1104 * from the vfat file system and hints from Petr Vandrovec.
1105 */
1106
1107 int
1108 ncp__io2vol(struct ncp_server *server, unsigned char *vname, unsigned int *vlen,
1109 const unsigned char *iname, unsigned int ilen, int cc)
1110 {
1111 struct nls_table *in = server->nls_io;
1112 struct nls_table *out = server->nls_vol;
1113 unsigned char *vname_start;
1114 unsigned char *vname_end;
1115 const unsigned char *iname_end;
1116
1117 iname_end = iname + ilen;
1118 vname_start = vname;
1119 vname_end = vname + *vlen - 1;
1120
1121 while (iname < iname_end) {
1122 int chl;
1123 wchar_t ec;
1124
1125 if (NCP_IS_FLAG(server, NCP_FLAG_UTF8)) {
1126 int k;
1127 unicode_t u;
1128
1129 k = utf8_to_utf32(iname, iname_end - iname, &u);
1130 if (k < 0 || u > MAX_WCHAR_T)
1131 return -EINVAL;
1132 iname += k;
1133 ec = u;
1134 } else {
1135 if (*iname == NCP_ESC) {
1136 int k;
1137
1138 if (iname_end - iname < 5)
1139 goto nospec;
1140
1141 ec = 0;
1142 for (k = 1; k < 5; k++) {
1143 unsigned char nc;
1144
1145 nc = iname[k] - '0';
1146 if (nc >= 10) {
1147 nc -= 'A' - '0' - 10;
1148 if ((nc < 10) || (nc > 15)) {
1149 goto nospec;
1150 }
1151 }
1152 ec = (ec << 4) | nc;
1153 }
1154 iname += 5;
1155 } else {
1156 nospec:;
1157 if ( (chl = in->char2uni(iname, iname_end - iname, &ec)) < 0)
1158 return chl;
1159 iname += chl;
1160 }
1161 }
1162
1163 /* unitoupper should be here! */
1164
1165 chl = out->uni2char(ec, vname, vname_end - vname);
1166 if (chl < 0)
1167 return chl;
1168
1169 /* this is wrong... */
1170 if (cc) {
1171 int chi;
1172
1173 for (chi = 0; chi < chl; chi++){
1174 vname[chi] = ncp_toupper(out, vname[chi]);
1175 }
1176 }
1177 vname += chl;
1178 }
1179
1180 *vname = 0;
1181 *vlen = vname - vname_start;
1182 return 0;
1183 }
1184
1185 int
1186 ncp__vol2io(struct ncp_server *server, unsigned char *iname, unsigned int *ilen,
1187 const unsigned char *vname, unsigned int vlen, int cc)
1188 {
1189 struct nls_table *in = server->nls_vol;
1190 struct nls_table *out = server->nls_io;
1191 const unsigned char *vname_end;
1192 unsigned char *iname_start;
1193 unsigned char *iname_end;
1194 unsigned char *vname_cc;
1195 int err;
1196
1197 vname_cc = NULL;
1198
1199 if (cc) {
1200 int i;
1201
1202 /* this is wrong! */
1203 vname_cc = kmalloc(vlen, GFP_KERNEL);
1204 if (!vname_cc)
1205 return -ENOMEM;
1206 for (i = 0; i < vlen; i++)
1207 vname_cc[i] = ncp_tolower(in, vname[i]);
1208 vname = vname_cc;
1209 }
1210
1211 iname_start = iname;
1212 iname_end = iname + *ilen - 1;
1213 vname_end = vname + vlen;
1214
1215 while (vname < vname_end) {
1216 wchar_t ec;
1217 int chl;
1218
1219 if ( (chl = in->char2uni(vname, vname_end - vname, &ec)) < 0) {
1220 err = chl;
1221 goto quit;
1222 }
1223 vname += chl;
1224
1225 /* unitolower should be here! */
1226
1227 if (NCP_IS_FLAG(server, NCP_FLAG_UTF8)) {
1228 int k;
1229
1230 k = utf32_to_utf8(ec, iname, iname_end - iname);
1231 if (k < 0) {
1232 err = -ENAMETOOLONG;
1233 goto quit;
1234 }
1235 iname += k;
1236 } else {
1237 if ( (chl = out->uni2char(ec, iname, iname_end - iname)) >= 0) {
1238 iname += chl;
1239 } else {
1240 int k;
1241
1242 if (iname_end - iname < 5) {
1243 err = -ENAMETOOLONG;
1244 goto quit;
1245 }
1246 *iname = NCP_ESC;
1247 for (k = 4; k > 0; k--) {
1248 unsigned char v;
1249
1250 v = (ec & 0xF) + '0';
1251 if (v > '9') {
1252 v += 'A' - '9' - 1;
1253 }
1254 iname[k] = v;
1255 ec >>= 4;
1256 }
1257 iname += 5;
1258 }
1259 }
1260 }
1261
1262 *iname = 0;
1263 *ilen = iname - iname_start;
1264 err = 0;
1265 quit:;
1266 if (cc)
1267 kfree(vname_cc);
1268 return err;
1269 }
1270
1271 #else
1272
1273 int
1274 ncp__io2vol(unsigned char *vname, unsigned int *vlen,
1275 const unsigned char *iname, unsigned int ilen, int cc)
1276 {
1277 int i;
1278
1279 if (*vlen <= ilen)
1280 return -ENAMETOOLONG;
1281
1282 if (cc)
1283 for (i = 0; i < ilen; i++) {
1284 *vname = toupper(*iname);
1285 vname++;
1286 iname++;
1287 }
1288 else {
1289 memmove(vname, iname, ilen);
1290 vname += ilen;
1291 }
1292
1293 *vlen = ilen;
1294 *vname = 0;
1295 return 0;
1296 }
1297
1298 int
1299 ncp__vol2io(unsigned char *iname, unsigned int *ilen,
1300 const unsigned char *vname, unsigned int vlen, int cc)
1301 {
1302 int i;
1303
1304 if (*ilen <= vlen)
1305 return -ENAMETOOLONG;
1306
1307 if (cc)
1308 for (i = 0; i < vlen; i++) {
1309 *iname = tolower(*vname);
1310 iname++;
1311 vname++;
1312 }
1313 else {
1314 memmove(iname, vname, vlen);
1315 iname += vlen;
1316 }
1317
1318 *ilen = vlen;
1319 *iname = 0;
1320 return 0;
1321 }
1322
1323 #endif
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree