blob: 8a0edd695f84ba5a29de4c7a1a17045a3d80f892 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * fs/cifs/misc.c
3 *
4 * Copyright (C) International Business Machines Corp., 2002,2004
5 * Author(s): Steve French (sfrench@us.ibm.com)
6 *
7 * This library is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU Lesser General Public License as published
9 * by the Free Software Foundation; either version 2.1 of the License, or
10 * (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
15 * the GNU Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public License
18 * along with this library; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21
22#include <linux/slab.h>
23#include <linux/ctype.h>
24#include <linux/mempool.h>
25#include "cifspdu.h"
26#include "cifsglob.h"
27#include "cifsproto.h"
28#include "cifs_debug.h"
29#include "smberr.h"
30#include "nterr.h"
Steve French6c91d362005-04-28 22:41:06 -070031#include "cifs_unicode.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070032
33extern mempool_t *cifs_sm_req_poolp;
34extern mempool_t *cifs_req_poolp;
35extern struct task_struct * oplockThread;
36
Linus Torvalds1da177e2005-04-16 15:20:36 -070037/* The xid serves as a useful identifier for each incoming vfs request,
38 in a similar way to the mid which is useful to track each sent smb,
39 and CurrentXid can also provide a running counter (although it
40 will eventually wrap past zero) of the total vfs operations handled
41 since the cifs fs was mounted */
42
43unsigned int
44_GetXid(void)
45{
46 unsigned int xid;
47
48 spin_lock(&GlobalMid_Lock);
49 GlobalTotalActiveXid++;
50 if (GlobalTotalActiveXid > GlobalMaxActiveXid)
51 GlobalMaxActiveXid = GlobalTotalActiveXid; /* keep high water mark for number of simultaneous vfs ops in our filesystem */
Steve French1982c342005-08-17 12:38:22 -070052 if(GlobalTotalActiveXid > 65000)
53 cFYI(1,("warning: more than 65000 requests active"));
Linus Torvalds1da177e2005-04-16 15:20:36 -070054 xid = GlobalCurrentXid++;
55 spin_unlock(&GlobalMid_Lock);
56 return xid;
57}
58
59void
60_FreeXid(unsigned int xid)
61{
62 spin_lock(&GlobalMid_Lock);
63 /* if(GlobalTotalActiveXid == 0)
64 BUG(); */
65 GlobalTotalActiveXid--;
66 spin_unlock(&GlobalMid_Lock);
67}
68
69struct cifsSesInfo *
70sesInfoAlloc(void)
71{
72 struct cifsSesInfo *ret_buf;
73
74 ret_buf =
75 (struct cifsSesInfo *) kmalloc(sizeof (struct cifsSesInfo),
76 GFP_KERNEL);
77 if (ret_buf) {
78 memset(ret_buf, 0, sizeof (struct cifsSesInfo));
79 write_lock(&GlobalSMBSeslock);
80 atomic_inc(&sesInfoAllocCount);
81 ret_buf->status = CifsNew;
82 list_add(&ret_buf->cifsSessionList, &GlobalSMBSessionList);
83 init_MUTEX(&ret_buf->sesSem);
84 write_unlock(&GlobalSMBSeslock);
85 }
86 return ret_buf;
87}
88
89void
90sesInfoFree(struct cifsSesInfo *buf_to_free)
91{
92 if (buf_to_free == NULL) {
93 cFYI(1, ("Null buffer passed to sesInfoFree"));
94 return;
95 }
96
97 write_lock(&GlobalSMBSeslock);
98 atomic_dec(&sesInfoAllocCount);
99 list_del(&buf_to_free->cifsSessionList);
100 write_unlock(&GlobalSMBSeslock);
101 if (buf_to_free->serverOS)
102 kfree(buf_to_free->serverOS);
103 if (buf_to_free->serverDomain)
104 kfree(buf_to_free->serverDomain);
105 if (buf_to_free->serverNOS)
106 kfree(buf_to_free->serverNOS);
107 if (buf_to_free->password)
108 kfree(buf_to_free->password);
109 kfree(buf_to_free);
110}
111
112struct cifsTconInfo *
113tconInfoAlloc(void)
114{
115 struct cifsTconInfo *ret_buf;
116 ret_buf =
117 (struct cifsTconInfo *) kmalloc(sizeof (struct cifsTconInfo),
118 GFP_KERNEL);
119 if (ret_buf) {
120 memset(ret_buf, 0, sizeof (struct cifsTconInfo));
121 write_lock(&GlobalSMBSeslock);
122 atomic_inc(&tconInfoAllocCount);
123 list_add(&ret_buf->cifsConnectionList,
124 &GlobalTreeConnectionList);
125 ret_buf->tidStatus = CifsNew;
126 INIT_LIST_HEAD(&ret_buf->openFileList);
127 init_MUTEX(&ret_buf->tconSem);
128#ifdef CONFIG_CIFS_STATS
129 spin_lock_init(&ret_buf->stat_lock);
130#endif
131 write_unlock(&GlobalSMBSeslock);
132 }
133 return ret_buf;
134}
135
136void
137tconInfoFree(struct cifsTconInfo *buf_to_free)
138{
139 if (buf_to_free == NULL) {
140 cFYI(1, ("Null buffer passed to tconInfoFree"));
141 return;
142 }
143 write_lock(&GlobalSMBSeslock);
144 atomic_dec(&tconInfoAllocCount);
145 list_del(&buf_to_free->cifsConnectionList);
146 write_unlock(&GlobalSMBSeslock);
147 if (buf_to_free->nativeFileSystem)
148 kfree(buf_to_free->nativeFileSystem);
149 kfree(buf_to_free);
150}
151
152struct smb_hdr *
153cifs_buf_get(void)
154{
155 struct smb_hdr *ret_buf = NULL;
156
157/* We could use negotiated size instead of max_msgsize -
158 but it may be more efficient to always alloc same size
159 albeit slightly larger than necessary and maxbuffersize
160 defaults to this and can not be bigger */
161 ret_buf =
162 (struct smb_hdr *) mempool_alloc(cifs_req_poolp, SLAB_KERNEL | SLAB_NOFS);
163
164 /* clear the first few header bytes */
165 /* for most paths, more is cleared in header_assemble */
166 if (ret_buf) {
167 memset(ret_buf, 0, sizeof(struct smb_hdr) + 3);
168 atomic_inc(&bufAllocCount);
169 }
170
171 return ret_buf;
172}
173
174void
175cifs_buf_release(void *buf_to_free)
176{
177
178 if (buf_to_free == NULL) {
179 /* cFYI(1, ("Null buffer passed to cifs_buf_release"));*/
180 return;
181 }
182 mempool_free(buf_to_free,cifs_req_poolp);
183
184 atomic_dec(&bufAllocCount);
185 return;
186}
187
188struct smb_hdr *
189cifs_small_buf_get(void)
190{
191 struct smb_hdr *ret_buf = NULL;
192
193/* We could use negotiated size instead of max_msgsize -
194 but it may be more efficient to always alloc same size
195 albeit slightly larger than necessary and maxbuffersize
196 defaults to this and can not be bigger */
197 ret_buf =
198 (struct smb_hdr *) mempool_alloc(cifs_sm_req_poolp, SLAB_KERNEL | SLAB_NOFS);
199 if (ret_buf) {
200 /* No need to clear memory here, cleared in header assemble */
201 /* memset(ret_buf, 0, sizeof(struct smb_hdr) + 27);*/
202 atomic_inc(&smBufAllocCount);
203 }
204 return ret_buf;
205}
206
207void
208cifs_small_buf_release(void *buf_to_free)
209{
210
211 if (buf_to_free == NULL) {
212 cFYI(1, ("Null buffer passed to cifs_small_buf_release"));
213 return;
214 }
215 mempool_free(buf_to_free,cifs_sm_req_poolp);
216
217 atomic_dec(&smBufAllocCount);
218 return;
219}
220
Steve French1982c342005-08-17 12:38:22 -0700221/*
222 Find a free multiplex id (SMB mid). Otherwise there could be
223 mid collisions which might cause problems, demultiplexing the
224 wrong response to this request. Multiplex ids could collide if
225 one of a series requests takes much longer than the others, or
226 if a very large number of long lived requests (byte range
227 locks or FindNotify requests) are pending. No more than
228 64K-1 requests can be outstanding at one time. If no
229 mids are available, return zero. A future optimization
230 could make the combination of mids and uid the key we use
231 to demultiplex on (rather than mid alone).
232 In addition to the above check, the cifs demultiplex
233 code already used the command code as a secondary
234 check of the frame and if signing is negotiated the
235 response would be discarded if the mid were the same
236 but the signature was wrong. Since the mid is not put in the
237 pending queue until later (when it is about to be dispatched)
238 we do have to limit the number of outstanding requests
239 to somewhat less than 64K-1 although it is hard to imagine
240 so many threads being in the vfs at one time.
241*/
242__u16 GetNextMid(struct TCP_Server_Info *server)
243{
244 __u16 mid = 0;
245 __u16 last_mid;
246 int collision;
247
248 if(server == NULL)
249 return mid;
250
251 spin_lock(&GlobalMid_Lock);
252 last_mid = server->CurrentMid; /* we do not want to loop forever */
253 server->CurrentMid++;
254 /* This nested loop looks more expensive than it is.
255 In practice the list of pending requests is short,
256 fewer than 50, and the mids are likely to be unique
257 on the first pass through the loop unless some request
258 takes longer than the 64 thousand requests before it
259 (and it would also have to have been a request that
260 did not time out) */
261 while(server->CurrentMid != last_mid) {
262 struct list_head *tmp;
263 struct mid_q_entry *mid_entry;
264
265 collision = 0;
266 if(server->CurrentMid == 0)
267 server->CurrentMid++;
268
269 list_for_each(tmp, &server->pending_mid_q) {
270 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
271
272 if ((mid_entry->mid == server->CurrentMid) &&
273 (mid_entry->midState == MID_REQUEST_SUBMITTED)) {
274 /* This mid is in use, try a different one */
275 collision = 1;
276 break;
277 }
278 }
279 if(collision == 0) {
280 mid = server->CurrentMid;
281 break;
282 }
283 server->CurrentMid++;
284 }
285 spin_unlock(&GlobalMid_Lock);
286 return mid;
287}
288
289/* NB: MID can not be set if treeCon not passed in, in that
290 case it is responsbility of caller to set the mid */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291void
292header_assemble(struct smb_hdr *buffer, char smb_command /* command */ ,
293 const struct cifsTconInfo *treeCon, int word_count
294 /* length of fixed section (word count) in two byte units */)
295{
296 struct list_head* temp_item;
297 struct cifsSesInfo * ses;
298 char *temp = (char *) buffer;
299
300 memset(temp,0,MAX_CIFS_HDR_SIZE);
301
302 buffer->smb_buf_length =
303 (2 * word_count) + sizeof (struct smb_hdr) -
304 4 /* RFC 1001 length field does not count */ +
305 2 /* for bcc field itself */ ;
Steve French1982c342005-08-17 12:38:22 -0700306 /* Note that this is the only network field that has to be converted
307 to big endian and it is done just before we send it */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308
309 buffer->Protocol[0] = 0xFF;
310 buffer->Protocol[1] = 'S';
311 buffer->Protocol[2] = 'M';
312 buffer->Protocol[3] = 'B';
313 buffer->Command = smb_command;
314 buffer->Flags = 0x00; /* case sensitive */
315 buffer->Flags2 = SMBFLG2_KNOWS_LONG_NAMES;
316 buffer->Pid = cpu_to_le16((__u16)current->tgid);
317 buffer->PidHigh = cpu_to_le16((__u16)(current->tgid >> 16));
318 spin_lock(&GlobalMid_Lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319 spin_unlock(&GlobalMid_Lock);
320 if (treeCon) {
321 buffer->Tid = treeCon->tid;
322 if (treeCon->ses) {
323 if (treeCon->ses->capabilities & CAP_UNICODE)
324 buffer->Flags2 |= SMBFLG2_UNICODE;
325 if (treeCon->ses->capabilities & CAP_STATUS32) {
326 buffer->Flags2 |= SMBFLG2_ERR_STATUS;
327 }
Steve French1982c342005-08-17 12:38:22 -0700328 /* Uid is not converted */
329 buffer->Uid = treeCon->ses->Suid;
330 buffer->Mid = GetNextMid(treeCon->ses->server);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331 if(multiuser_mount != 0) {
332 /* For the multiuser case, there are few obvious technically */
333 /* possible mechanisms to match the local linux user (uid) */
334 /* to a valid remote smb user (smb_uid): */
335 /* 1) Query Winbind (or other local pam/nss daemon */
336 /* for userid/password/logon_domain or credential */
337 /* 2) Query Winbind for uid to sid to username mapping */
338 /* and see if we have a matching password for existing*/
339 /* session for that user perhas getting password by */
340 /* adding a new pam_cifs module that stores passwords */
341 /* so that the cifs vfs can get at that for all logged*/
342 /* on users */
343 /* 3) (Which is the mechanism we have chosen) */
344 /* Search through sessions to the same server for a */
345 /* a match on the uid that was passed in on mount */
346 /* with the current processes uid (or euid?) and use */
347 /* that smb uid. If no existing smb session for */
348 /* that uid found, use the default smb session ie */
349 /* the smb session for the volume mounted which is */
350 /* the same as would be used if the multiuser mount */
351 /* flag were disabled. */
352
353 /* BB Add support for establishing new tCon and SMB Session */
354 /* with userid/password pairs found on the smb session */
355 /* for other target tcp/ip addresses BB */
356 if(current->uid != treeCon->ses->linux_uid) {
357 cFYI(1,("Multiuser mode and UID did not match tcon uid "));
358 read_lock(&GlobalSMBSeslock);
359 list_for_each(temp_item, &GlobalSMBSessionList) {
360 ses = list_entry(temp_item, struct cifsSesInfo, cifsSessionList);
361 if(ses->linux_uid == current->uid) {
362 if(ses->server == treeCon->ses->server) {
363 cFYI(1,("found matching uid substitute right smb_uid"));
364 buffer->Uid = ses->Suid;
365 break;
366 } else {
367 /* BB eventually call cifs_setup_session here */
368 cFYI(1,("local UID found but smb sess with this server does not exist"));
369 }
370 }
371 }
372 read_unlock(&GlobalSMBSeslock);
373 }
374 }
375 }
376 if (treeCon->Flags & SMB_SHARE_IS_IN_DFS)
377 buffer->Flags2 |= SMBFLG2_DFS;
Steve Frenchd3485d32005-08-19 11:04:29 -0700378 if (treeCon->nocase)
379 buffer->Flags |= SMBFLG_CASELESS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380 if((treeCon->ses) && (treeCon->ses->server))
381 if(treeCon->ses->server->secMode &
382 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
383 buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
384 }
385
386/* endian conversion of flags is now done just before sending */
387 buffer->WordCount = (char) word_count;
388 return;
389}
390
391int
392checkSMBhdr(struct smb_hdr *smb, __u16 mid)
393{
394 /* Make sure that this really is an SMB, that it is a response,
395 and that the message ids match */
396 if ((*(__le32 *) smb->Protocol == cpu_to_le32(0x424d53ff)) &&
397 (mid == smb->Mid)) {
398 if(smb->Flags & SMBFLG_RESPONSE)
399 return 0;
400 else {
401 /* only one valid case where server sends us request */
402 if(smb->Command == SMB_COM_LOCKING_ANDX)
403 return 0;
404 else
405 cERROR(1, ("Rcvd Request not response "));
406 }
407 } else { /* bad signature or mid */
408 if (*(__le32 *) smb->Protocol != cpu_to_le32(0x424d53ff))
409 cERROR(1,
410 ("Bad protocol string signature header %x ",
411 *(unsigned int *) smb->Protocol));
412 if (mid != smb->Mid)
413 cERROR(1, ("Mids do not match"));
414 }
415 cERROR(1, ("bad smb detected. The Mid=%d", smb->Mid));
416 return 1;
417}
418
419int
420checkSMB(struct smb_hdr *smb, __u16 mid, int length)
421{
Steve French70ca7342005-09-22 16:32:06 -0700422 __u32 len = smb->smb_buf_length;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423 cFYI(0,
424 ("Entering checkSMB with Length: %x, smb_buf_length: %x ",
425 length, len));
426 if (((unsigned int)length < 2 + sizeof (struct smb_hdr)) ||
427 (len > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4)) {
428 if ((unsigned int)length < 2 + sizeof (struct smb_hdr)) {
429 if (((unsigned int)length >=
430 sizeof (struct smb_hdr) - 1)
431 && (smb->Status.CifsError != 0)) {
432 smb->WordCount = 0;
433 return 0; /* some error cases do not return wct and bcc */
434 } else {
435 cERROR(1, ("Length less than smb header size"));
436 }
437
438 }
439 if (len > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4)
440 cERROR(1,
441 ("smb_buf_length greater than MaxBufSize"));
442 cERROR(1,
443 ("bad smb detected. Illegal length. The mid=%d",
444 smb->Mid));
445 return 1;
446 }
447
448 if (checkSMBhdr(smb, mid))
449 return 1;
450
Steve French70ca7342005-09-22 16:32:06 -0700451 if ((4 + len != smbCalcSize_LE(smb))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452 || (4 + len != (unsigned int)length)) {
Steve French70ca7342005-09-22 16:32:06 -0700453 cERROR(1, ("smbCalcSize %x ", smbCalcSize_LE(smb)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454 cERROR(1,
455 ("bad smb size detected. The Mid=%d", smb->Mid));
456 return 1;
457 }
Steve French20962432005-09-21 22:05:57 -0700458 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459}
460int
461is_valid_oplock_break(struct smb_hdr *buf)
462{
463 struct smb_com_lock_req * pSMB = (struct smb_com_lock_req *)buf;
464 struct list_head *tmp;
465 struct list_head *tmp1;
466 struct cifsTconInfo *tcon;
467 struct cifsFileInfo *netfile;
468
469 cFYI(1,("Checking for oplock break or dnotify response"));
470 if((pSMB->hdr.Command == SMB_COM_NT_TRANSACT) &&
471 (pSMB->hdr.Flags & SMBFLG_RESPONSE)) {
472 struct smb_com_transaction_change_notify_rsp * pSMBr =
473 (struct smb_com_transaction_change_notify_rsp *)buf;
474 struct file_notify_information * pnotify;
475 __u32 data_offset = 0;
476 if(pSMBr->ByteCount > sizeof(struct file_notify_information)) {
477 data_offset = le32_to_cpu(pSMBr->DataOffset);
478
479 pnotify = (struct file_notify_information *)((char *)&pSMBr->hdr.Protocol
480 + data_offset);
481 cFYI(1,("dnotify on %s with action: 0x%x",pnotify->FileName,
482 pnotify->Action)); /* BB removeme BB */
483 /* cifs_dump_mem("Received notify Data is: ",buf,sizeof(struct smb_hdr)+60); */
484 return TRUE;
485 }
486 if(pSMBr->hdr.Status.CifsError) {
487 cFYI(1,("notify err 0x%d",pSMBr->hdr.Status.CifsError));
488 return TRUE;
489 }
490 return FALSE;
491 }
492 if(pSMB->hdr.Command != SMB_COM_LOCKING_ANDX)
493 return FALSE;
494 if(pSMB->hdr.Flags & SMBFLG_RESPONSE) {
495 /* no sense logging error on invalid handle on oplock
496 break - harmless race between close request and oplock
497 break response is expected from time to time writing out
498 large dirty files cached on the client */
499 if ((NT_STATUS_INVALID_HANDLE) ==
500 le32_to_cpu(pSMB->hdr.Status.CifsError)) {
501 cFYI(1,("invalid handle on oplock break"));
502 return TRUE;
503 } else if (ERRbadfid ==
504 le16_to_cpu(pSMB->hdr.Status.DosError.Error)) {
505 return TRUE;
506 } else {
507 return FALSE; /* on valid oplock brk we get "request" */
508 }
509 }
510 if(pSMB->hdr.WordCount != 8)
511 return FALSE;
512
513 cFYI(1,(" oplock type 0x%d level 0x%d",pSMB->LockType,pSMB->OplockLevel));
514 if(!(pSMB->LockType & LOCKING_ANDX_OPLOCK_RELEASE))
515 return FALSE;
516
517 /* look up tcon based on tid & uid */
518 read_lock(&GlobalSMBSeslock);
519 list_for_each(tmp, &GlobalTreeConnectionList) {
520 tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
521 if (tcon->tid == buf->Tid) {
Steve Frencha4544342005-08-24 13:59:35 -0700522 cifs_stats_inc(&tcon->num_oplock_brks);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523 list_for_each(tmp1,&tcon->openFileList){
Steve French57337e42005-04-28 22:41:10 -0700524 netfile = list_entry(tmp1,struct cifsFileInfo,
525 tlist);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526 if(pSMB->Fid == netfile->netfid) {
527 struct cifsInodeInfo *pCifsInode;
528 read_unlock(&GlobalSMBSeslock);
Steve French57337e42005-04-28 22:41:10 -0700529 cFYI(1,("file id match, oplock break"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700530 pCifsInode =
531 CIFS_I(netfile->pInode);
532 pCifsInode->clientCanCacheAll = FALSE;
533 if(pSMB->OplockLevel == 0)
Steve French57337e42005-04-28 22:41:10 -0700534 pCifsInode->clientCanCacheRead
535 = FALSE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536 pCifsInode->oplockPending = TRUE;
Steve French57337e42005-04-28 22:41:10 -0700537 AllocOplockQEntry(netfile->pInode,
538 netfile->netfid,
539 tcon);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540 cFYI(1,("about to wake up oplock thd"));
Steve French57337e42005-04-28 22:41:10 -0700541 if(oplockThread)
542 wake_up_process(oplockThread);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543 return TRUE;
544 }
545 }
546 read_unlock(&GlobalSMBSeslock);
Steve French57337e42005-04-28 22:41:10 -0700547 cFYI(1,("No matching file for oplock break"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548 return TRUE;
549 }
550 }
551 read_unlock(&GlobalSMBSeslock);
552 cFYI(1,("Can not process oplock break for non-existent connection"));
553 return TRUE;
554}
555
556void
557dump_smb(struct smb_hdr *smb_buf, int smb_buf_length)
558{
559 int i, j;
560 char debug_line[17];
561 unsigned char *buffer;
562
563 if (traceSMB == 0)
564 return;
565
566 buffer = (unsigned char *) smb_buf;
567 for (i = 0, j = 0; i < smb_buf_length; i++, j++) {
Steve French57337e42005-04-28 22:41:10 -0700568 if (i % 8 == 0) { /* have reached the beginning of line */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569 printk(KERN_DEBUG "| ");
570 j = 0;
571 }
572 printk("%0#4x ", buffer[i]);
573 debug_line[2 * j] = ' ';
574 if (isprint(buffer[i]))
575 debug_line[1 + (2 * j)] = buffer[i];
576 else
577 debug_line[1 + (2 * j)] = '_';
578
Steve French57337e42005-04-28 22:41:10 -0700579 if (i % 8 == 7) { /* reached end of line, time to print ascii */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580 debug_line[16] = 0;
581 printk(" | %s\n", debug_line);
582 }
583 }
584 for (; j < 8; j++) {
585 printk(" ");
586 debug_line[2 * j] = ' ';
587 debug_line[1 + (2 * j)] = ' ';
588 }
589 printk( " | %s\n", debug_line);
590 return;
591}
Steve French6a0b4822005-04-28 22:41:05 -0700592
Steve French6a0b4822005-04-28 22:41:05 -0700593/* Windows maps these to the user defined 16 bit Unicode range since they are
594 reserved symbols (along with \ and /), otherwise illegal to store
595 in filenames in NTFS */
Steve Frenchd0724712005-04-28 22:41:06 -0700596#define UNI_ASTERIK (__u16) ('*' + 0xF000)
597#define UNI_QUESTION (__u16) ('?' + 0xF000)
598#define UNI_COLON (__u16) (':' + 0xF000)
599#define UNI_GRTRTHAN (__u16) ('>' + 0xF000)
600#define UNI_LESSTHAN (__u16) ('<' + 0xF000)
601#define UNI_PIPE (__u16) ('|' + 0xF000)
602#define UNI_SLASH (__u16) ('\\' + 0xF000)
Steve French6a0b4822005-04-28 22:41:05 -0700603
604/* Convert 16 bit Unicode pathname from wire format to string in current code
605 page. Conversion may involve remapping up the seven characters that are
606 only legal in POSIX-like OS (if they are present in the string). Path
607 names are little endian 16 bit Unicode on the wire */
608int
609cifs_convertUCSpath(char *target, const __le16 * source, int maxlen,
610 const struct nls_table * cp)
611{
612 int i,j,len;
Steve Frenchd0724712005-04-28 22:41:06 -0700613 __u16 src_char;
Steve French6a0b4822005-04-28 22:41:05 -0700614
615 for(i = 0, j = 0; i < maxlen; i++) {
616 src_char = le16_to_cpu(source[i]);
617 switch (src_char) {
618 case 0:
619 goto cUCS_out; /* BB check this BB */
620 case UNI_COLON:
621 target[j] = ':';
622 break;
623 case UNI_ASTERIK:
624 target[j] = '*';
625 break;
626 case UNI_QUESTION:
627 target[j] = '?';
628 break;
Steve French6c91d362005-04-28 22:41:06 -0700629 /* BB We can not handle remapping slash until
630 all the calls to build_path_from_dentry
631 are modified, as they use slash as separator BB */
632 /* case UNI_SLASH:
633 target[j] = '\\';
634 break;*/
Steve French6a0b4822005-04-28 22:41:05 -0700635 case UNI_PIPE:
636 target[j] = '|';
637 break;
638 case UNI_GRTRTHAN:
639 target[j] = '>';
640 break;
641 case UNI_LESSTHAN:
642 target[j] = '<';
Steve French67594fe2005-05-17 13:04:49 -0500643 break;
Steve French6a0b4822005-04-28 22:41:05 -0700644 default:
645 len = cp->uni2char(src_char, &target[j],
646 NLS_MAX_CHARSET_SIZE);
647 if(len > 0) {
648 j += len;
649 continue;
650 } else {
651 target[j] = '?';
652 }
653 }
654 j++;
Steve French57337e42005-04-28 22:41:10 -0700655 /* make sure we do not overrun callers allocated temp buffer */
Steve French6a0b4822005-04-28 22:41:05 -0700656 if(j >= (2 * NAME_MAX))
657 break;
658 }
659cUCS_out:
660 target[j] = 0;
661 return j;
662}
Steve French6c91d362005-04-28 22:41:06 -0700663
664/* Convert 16 bit Unicode pathname to wire format from string in current code
665 page. Conversion may involve remapping up the seven characters that are
666 only legal in POSIX-like OS (if they are present in the string). Path
667 names are little endian 16 bit Unicode on the wire */
668int
669cifsConvertToUCS(__le16 * target, const char *source, int maxlen,
670 const struct nls_table * cp, int mapChars)
671{
672 int i,j,charlen;
673 int len_remaining = maxlen;
674 char src_char;
Steve French70ca7342005-09-22 16:32:06 -0700675 __u16 temp;
Steve French6c91d362005-04-28 22:41:06 -0700676
677 if(!mapChars)
Steve French57337e42005-04-28 22:41:10 -0700678 return cifs_strtoUCS((wchar_t *) target, source, PATH_MAX, cp);
Steve French6c91d362005-04-28 22:41:06 -0700679
680 for(i = 0, j = 0; i < maxlen; j++) {
681 src_char = source[i];
682 switch (src_char) {
683 case 0:
Steve Frenchf4cfd692005-07-14 18:29:02 -0500684 target[j] = 0;
Steve French6c91d362005-04-28 22:41:06 -0700685 goto ctoUCS_out;
686 case ':':
687 target[j] = cpu_to_le16(UNI_COLON);
688 break;
689 case '*':
690 target[j] = cpu_to_le16(UNI_ASTERIK);
691 break;
692 case '?':
693 target[j] = cpu_to_le16(UNI_QUESTION);
694 break;
695 case '<':
696 target[j] = cpu_to_le16(UNI_LESSTHAN);
697 break;
698 case '>':
699 target[j] = cpu_to_le16(UNI_GRTRTHAN);
700 break;
701 case '|':
702 target[j] = cpu_to_le16(UNI_PIPE);
703 break;
704 /* BB We can not handle remapping slash until
705 all the calls to build_path_from_dentry
706 are modified, as they use slash as separator BB */
707 /* case '\\':
708 target[j] = cpu_to_le16(UNI_SLASH);
709 break;*/
710 default:
711 charlen = cp->char2uni(source+i,
Steve French70ca7342005-09-22 16:32:06 -0700712 len_remaining, &temp);
Steve French6c91d362005-04-28 22:41:06 -0700713 /* if no match, use question mark, which
714 at least in some cases servers as wild card */
715 if(charlen < 1) {
716 target[j] = cpu_to_le16(0x003f);
717 charlen = 1;
Steve French70ca7342005-09-22 16:32:06 -0700718 } else
719 target[j] = cpu_to_le16(temp);
Steve French6c91d362005-04-28 22:41:06 -0700720 len_remaining -= charlen;
721 /* character may take more than one byte in the
722 the source string, but will take exactly two
723 bytes in the target string */
724 i+= charlen;
725 continue;
726 }
727 i++; /* move to next char in source string */
728 len_remaining--;
729 }
730
731ctoUCS_out:
732 return i;
733}