?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
added 2.6.29.6 aldebaran kernel
[nao-ulib.git] / kernel / 2.6.29.6-aldebaran-rt / fs / cifs / connect.c
blob0344b262a19290a38047835e089a3b03f280c415
1 /*
2 * fs/cifs/connect.c
3 *
4 * Copyright (C) International Business Machines Corp., 2002,2008
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 #include <linux/fs.h>
22 #include <linux/net.h>
23 #include <linux/string.h>
24 #include <linux/list.h>
25 #include <linux/wait.h>
26 #include <linux/pagemap.h>
27 #include <linux/ctype.h>
28 #include <linux/utsname.h>
29 #include <linux/mempool.h>
30 #include <linux/delay.h>
31 #include <linux/completion.h>
32 #include <linux/kthread.h>
33 #include <linux/pagevec.h>
34 #include <linux/freezer.h>
35 #include <asm/uaccess.h>
36 #include <asm/processor.h>
37 #include <net/ipv6.h>
38 #include "cifspdu.h"
39 #include "cifsglob.h"
40 #include "cifsproto.h"
41 #include "cifs_unicode.h"
42 #include "cifs_debug.h"
43 #include "cifs_fs_sb.h"
44 #include "ntlmssp.h"
45 #include "nterr.h"
46 #include "rfc1002pdu.h"
47 #include "cn_cifs.h"
48
49 #define CIFS_PORT 445
50 #define RFC1001_PORT 139
51
52 extern void SMBNTencrypt(unsigned char *passwd, unsigned char *c8,
53 unsigned char *p24);
54
55 extern mempool_t *cifs_req_poolp;
56
57 struct smb_vol {
58 char *username;
59 char *password;
60 char *domainname;
61 char *UNC;
62 char *UNCip;
63 char *in6_addr; /* ipv6 address as human readable form of in6_addr */
64 char *iocharset; /* local code page for mapping to and from Unicode */
65 char source_rfc1001_name[16]; /* netbios name of client */
66 char target_rfc1001_name[16]; /* netbios name of server for Win9x/ME */
67 uid_t linux_uid;
68 gid_t linux_gid;
69 mode_t file_mode;
70 mode_t dir_mode;
71 unsigned secFlg;
72 bool rw:1;
73 bool retry:1;
74 bool intr:1;
75 bool setuids:1;
76 bool override_uid:1;
77 bool override_gid:1;
78 bool dynperm:1;
79 bool noperm:1;
80 bool no_psx_acl:1; /* set if posix acl support should be disabled */
81 bool cifs_acl:1;
82 bool no_xattr:1; /* set if xattr (EA) support should be disabled*/
83 bool server_ino:1; /* use inode numbers from server ie UniqueId */
84 bool direct_io:1;
85 bool remap:1; /* set to remap seven reserved chars in filenames */
86 bool posix_paths:1; /* unset to not ask for posix pathnames. */
87 bool no_linux_ext:1;
88 bool sfu_emul:1;
89 bool nullauth:1; /* attempt to authenticate with null user */
90 bool nocase:1; /* request case insensitive filenames */
91 bool nobrl:1; /* disable sending byte range locks to srv */
92 bool mand_lock:1; /* send mandatory not posix byte range lock reqs */
93 bool seal:1; /* request transport encryption on share */
94 bool nodfs:1; /* Do not request DFS, even if available */
95 bool local_lease:1; /* check leases only on local system, not remote */
96 bool noblocksnd:1;
97 bool noautotune:1;
98 unsigned int rsize;
99 unsigned int wsize;
100 unsigned int sockopt;
101 unsigned short int port;
102 char *prepath;
103 };
104
105 static int ipv4_connect(struct TCP_Server_Info *server);
106 static int ipv6_connect(struct TCP_Server_Info *server);
107
108 /*
109 * cifs tcp session reconnection
110 *
111 * mark tcp session as reconnecting so temporarily locked
112 * mark all smb sessions as reconnecting for tcp session
113 * reconnect tcp session
114 * wake up waiters on reconnection? - (not needed currently)
115 */
116 static int
117 cifs_reconnect(struct TCP_Server_Info *server)
118 {
119 int rc = 0;
120 struct list_head *tmp, *tmp2;
121 struct cifsSesInfo *ses;
122 struct cifsTconInfo *tcon;
123 struct mid_q_entry *mid_entry;
124
125 spin_lock(&GlobalMid_Lock);
126 if (server->tcpStatus == CifsExiting) {
127 /* the demux thread will exit normally
128 next time through the loop */
129 spin_unlock(&GlobalMid_Lock);
130 return rc;
131 } else
132 server->tcpStatus = CifsNeedReconnect;
133 spin_unlock(&GlobalMid_Lock);
134 server->maxBuf = 0;
135
136 cFYI(1, ("Reconnecting tcp session"));
137
138 /* before reconnecting the tcp session, mark the smb session (uid)
139 and the tid bad so they are not used until reconnected */
140 read_lock(&cifs_tcp_ses_lock);
141 list_for_each(tmp, &server->smb_ses_list) {
142 ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list);
143 ses->need_reconnect = true;
144 ses->ipc_tid = 0;
145 list_for_each(tmp2, &ses->tcon_list) {
146 tcon = list_entry(tmp2, struct cifsTconInfo, tcon_list);
147 tcon->need_reconnect = true;
148 }
149 }
150 read_unlock(&cifs_tcp_ses_lock);
151 /* do not want to be sending data on a socket we are freeing */
152 mutex_lock(&server->srv_mutex);
153 if (server->ssocket) {
154 cFYI(1, ("State: 0x%x Flags: 0x%lx", server->ssocket->state,
155 server->ssocket->flags));
156 kernel_sock_shutdown(server->ssocket, SHUT_WR);
157 cFYI(1, ("Post shutdown state: 0x%x Flags: 0x%lx",
158 server->ssocket->state,
159 server->ssocket->flags));
160 sock_release(server->ssocket);
161 server->ssocket = NULL;
162 }
163
164 spin_lock(&GlobalMid_Lock);
165 list_for_each(tmp, &server->pending_mid_q) {
166 mid_entry = list_entry(tmp, struct
167 mid_q_entry,
168 qhead);
169 if (mid_entry->midState == MID_REQUEST_SUBMITTED) {
170 /* Mark other intransit requests as needing
171 retry so we do not immediately mark the
172 session bad again (ie after we reconnect
173 below) as they timeout too */
174 mid_entry->midState = MID_RETRY_NEEDED;
175 }
176 }
177 spin_unlock(&GlobalMid_Lock);
178 mutex_unlock(&server->srv_mutex);
179
180 while ((server->tcpStatus != CifsExiting) &&
181 (server->tcpStatus != CifsGood)) {
182 try_to_freeze();
183 if (server->addr.sockAddr6.sin6_family == AF_INET6)
184 rc = ipv6_connect(server);
185 else
186 rc = ipv4_connect(server);
187 if (rc) {
188 cFYI(1, ("reconnect error %d", rc));
189 msleep(3000);
190 } else {
191 atomic_inc(&tcpSesReconnectCount);
192 spin_lock(&GlobalMid_Lock);
193 if (server->tcpStatus != CifsExiting)
194 server->tcpStatus = CifsGood;
195 server->sequence_number = 0;
196 spin_unlock(&GlobalMid_Lock);
197 /* atomic_set(&server->inFlight,0);*/
198 wake_up(&server->response_q);
199 }
200 }
201 return rc;
202 }
203
204 /*
205 return codes:
206 0 not a transact2, or all data present
207 >0 transact2 with that much data missing
208 -EINVAL = invalid transact2
209
210 */
211 static int check2ndT2(struct smb_hdr *pSMB, unsigned int maxBufSize)
212 {
213 struct smb_t2_rsp *pSMBt;
214 int total_data_size;
215 int data_in_this_rsp;
216 int remaining;
217
218 if (pSMB->Command != SMB_COM_TRANSACTION2)
219 return 0;
220
221 /* check for plausible wct, bcc and t2 data and parm sizes */
222 /* check for parm and data offset going beyond end of smb */
223 if (pSMB->WordCount != 10) { /* coalesce_t2 depends on this */
224 cFYI(1, ("invalid transact2 word count"));
225 return -EINVAL;
226 }
227
228 pSMBt = (struct smb_t2_rsp *)pSMB;
229
230 total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
231 data_in_this_rsp = le16_to_cpu(pSMBt->t2_rsp.DataCount);
232
233 remaining = total_data_size - data_in_this_rsp;
234
235 if (remaining == 0)
236 return 0;
237 else if (remaining < 0) {
238 cFYI(1, ("total data %d smaller than data in frame %d",
239 total_data_size, data_in_this_rsp));
240 return -EINVAL;
241 } else {
242 cFYI(1, ("missing %d bytes from transact2, check next response",
243 remaining));
244 if (total_data_size > maxBufSize) {
245 cERROR(1, ("TotalDataSize %d is over maximum buffer %d",
246 total_data_size, maxBufSize));
247 return -EINVAL;
248 }
249 return remaining;
250 }
251 }
252
253 static int coalesce_t2(struct smb_hdr *psecond, struct smb_hdr *pTargetSMB)
254 {
255 struct smb_t2_rsp *pSMB2 = (struct smb_t2_rsp *)psecond;
256 struct smb_t2_rsp *pSMBt = (struct smb_t2_rsp *)pTargetSMB;
257 int total_data_size;
258 int total_in_buf;
259 int remaining;
260 int total_in_buf2;
261 char *data_area_of_target;
262 char *data_area_of_buf2;
263 __u16 byte_count;
264
265 total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
266
267 if (total_data_size != le16_to_cpu(pSMB2->t2_rsp.TotalDataCount)) {
268 cFYI(1, ("total data size of primary and secondary t2 differ"));
269 }
270
271 total_in_buf = le16_to_cpu(pSMBt->t2_rsp.DataCount);
272
273 remaining = total_data_size - total_in_buf;
274
275 if (remaining < 0)
276 return -EINVAL;
277
278 if (remaining == 0) /* nothing to do, ignore */
279 return 0;
280
281 total_in_buf2 = le16_to_cpu(pSMB2->t2_rsp.DataCount);
282 if (remaining < total_in_buf2) {
283 cFYI(1, ("transact2 2nd response contains too much data"));
284 }
285
286 /* find end of first SMB data area */
287 data_area_of_target = (char *)&pSMBt->hdr.Protocol +
288 le16_to_cpu(pSMBt->t2_rsp.DataOffset);
289 /* validate target area */
290
291 data_area_of_buf2 = (char *) &pSMB2->hdr.Protocol +
292 le16_to_cpu(pSMB2->t2_rsp.DataOffset);
293
294 data_area_of_target += total_in_buf;
295
296 /* copy second buffer into end of first buffer */
297 memcpy(data_area_of_target, data_area_of_buf2, total_in_buf2);
298 total_in_buf += total_in_buf2;
299 pSMBt->t2_rsp.DataCount = cpu_to_le16(total_in_buf);
300 byte_count = le16_to_cpu(BCC_LE(pTargetSMB));
301 byte_count += total_in_buf2;
302 BCC_LE(pTargetSMB) = cpu_to_le16(byte_count);
303
304 byte_count = pTargetSMB->smb_buf_length;
305 byte_count += total_in_buf2;
306
307 /* BB also add check that we are not beyond maximum buffer size */
308
309 pTargetSMB->smb_buf_length = byte_count;
310
311 if (remaining == total_in_buf2) {
312 cFYI(1, ("found the last secondary response"));
313 return 0; /* we are done */
314 } else /* more responses to go */
315 return 1;
316
317 }
318
319 static int
320 cifs_demultiplex_thread(struct TCP_Server_Info *server)
321 {
322 int length;
323 unsigned int pdu_length, total_read;
324 struct smb_hdr *smb_buffer = NULL;
325 struct smb_hdr *bigbuf = NULL;
326 struct smb_hdr *smallbuf = NULL;
327 struct msghdr smb_msg;
328 struct kvec iov;
329 struct socket *csocket = server->ssocket;
330 struct list_head *tmp;
331 struct cifsSesInfo *ses;
332 struct task_struct *task_to_wake = NULL;
333 struct mid_q_entry *mid_entry;
334 char temp;
335 bool isLargeBuf = false;
336 bool isMultiRsp;
337 int reconnect;
338
339 current->flags |= PF_MEMALLOC;
340 cFYI(1, ("Demultiplex PID: %d", task_pid_nr(current)));
341
342 length = atomic_inc_return(&tcpSesAllocCount);
343 if (length > 1)
344 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
345 GFP_KERNEL);
346
347 set_freezable();
348 while (server->tcpStatus != CifsExiting) {
349 if (try_to_freeze())
350 continue;
351 if (bigbuf == NULL) {
352 bigbuf = cifs_buf_get();
353 if (!bigbuf) {
354 cERROR(1, ("No memory for large SMB response"));
355 msleep(3000);
356 /* retry will check if exiting */
357 continue;
358 }
359 } else if (isLargeBuf) {
360 /* we are reusing a dirty large buf, clear its start */
361 memset(bigbuf, 0, sizeof(struct smb_hdr));
362 }
363
364 if (smallbuf == NULL) {
365 smallbuf = cifs_small_buf_get();
366 if (!smallbuf) {
367 cERROR(1, ("No memory for SMB response"));
368 msleep(1000);
369 /* retry will check if exiting */
370 continue;
371 }
372 /* beginning of smb buffer is cleared in our buf_get */
373 } else /* if existing small buf clear beginning */
374 memset(smallbuf, 0, sizeof(struct smb_hdr));
375
376 isLargeBuf = false;
377 isMultiRsp = false;
378 smb_buffer = smallbuf;
379 iov.iov_base = smb_buffer;
380 iov.iov_len = 4;
381 smb_msg.msg_control = NULL;
382 smb_msg.msg_controllen = 0;
383 pdu_length = 4; /* enough to get RFC1001 header */
384 incomplete_rcv:
385 length =
386 kernel_recvmsg(csocket, &smb_msg,
387 &iov, 1, pdu_length, 0 /* BB other flags? */);
388
389 if (server->tcpStatus == CifsExiting) {
390 break;
391 } else if (server->tcpStatus == CifsNeedReconnect) {
392 cFYI(1, ("Reconnect after server stopped responding"));
393 cifs_reconnect(server);
394 cFYI(1, ("call to reconnect done"));
395 csocket = server->ssocket;
396 continue;
397 } else if ((length == -ERESTARTSYS) || (length == -EAGAIN)) {
398 msleep(1); /* minimum sleep to prevent looping
399 allowing socket to clear and app threads to set
400 tcpStatus CifsNeedReconnect if server hung */
401 if (pdu_length < 4) {
402 iov.iov_base = (4 - pdu_length) +
403 (char *)smb_buffer;
404 iov.iov_len = pdu_length;
405 smb_msg.msg_control = NULL;
406 smb_msg.msg_controllen = 0;
407 goto incomplete_rcv;
408 } else
409 continue;
410 } else if (length <= 0) {
411 if (server->tcpStatus == CifsNew) {
412 cFYI(1, ("tcp session abend after SMBnegprot"));
413 /* some servers kill the TCP session rather than
414 returning an SMB negprot error, in which
415 case reconnecting here is not going to help,
416 and so simply return error to mount */
417 break;
418 }
419 if (!try_to_freeze() && (length == -EINTR)) {
420 cFYI(1, ("cifsd thread killed"));
421 break;
422 }
423 cFYI(1, ("Reconnect after unexpected peek error %d",
424 length));
425 cifs_reconnect(server);
426 csocket = server->ssocket;
427 wake_up(&server->response_q);
428 continue;
429 } else if (length < pdu_length) {
430 cFYI(1, ("requested %d bytes but only got %d bytes",
431 pdu_length, length));
432 pdu_length -= length;
433 msleep(1);
434 goto incomplete_rcv;
435 }
436
437 /* The right amount was read from socket - 4 bytes */
438 /* so we can now interpret the length field */
439
440 /* the first byte big endian of the length field,
441 is actually not part of the length but the type
442 with the most common, zero, as regular data */
443 temp = *((char *) smb_buffer);
444
445 /* Note that FC 1001 length is big endian on the wire,
446 but we convert it here so it is always manipulated
447 as host byte order */
448 pdu_length = be32_to_cpu((__force __be32)smb_buffer->smb_buf_length);
449 smb_buffer->smb_buf_length = pdu_length;
450
451 cFYI(1, ("rfc1002 length 0x%x", pdu_length+4));
452
453 if (temp == (char) RFC1002_SESSION_KEEP_ALIVE) {
454 continue;
455 } else if (temp == (char)RFC1002_POSITIVE_SESSION_RESPONSE) {
456 cFYI(1, ("Good RFC 1002 session rsp"));
457 continue;
458 } else if (temp == (char)RFC1002_NEGATIVE_SESSION_RESPONSE) {
459 /* we get this from Windows 98 instead of
460 an error on SMB negprot response */
461 cFYI(1, ("Negative RFC1002 Session Response Error 0x%x)",
462 pdu_length));
463 if (server->tcpStatus == CifsNew) {
464 /* if nack on negprot (rather than
465 ret of smb negprot error) reconnecting
466 not going to help, ret error to mount */
467 break;
468 } else {
469 /* give server a second to
470 clean up before reconnect attempt */
471 msleep(1000);
472 /* always try 445 first on reconnect
473 since we get NACK on some if we ever
474 connected to port 139 (the NACK is
475 since we do not begin with RFC1001
476 session initialize frame) */
477 server->addr.sockAddr.sin_port =
478 htons(CIFS_PORT);
479 cifs_reconnect(server);
480 csocket = server->ssocket;
481 wake_up(&server->response_q);
482 continue;
483 }
484 } else if (temp != (char) 0) {
485 cERROR(1, ("Unknown RFC 1002 frame"));
486 cifs_dump_mem(" Received Data: ", (char *)smb_buffer,
487 length);
488 cifs_reconnect(server);
489 csocket = server->ssocket;
490 continue;
491 }
492
493 /* else we have an SMB response */
494 if ((pdu_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) ||
495 (pdu_length < sizeof(struct smb_hdr) - 1 - 4)) {
496 cERROR(1, ("Invalid size SMB length %d pdu_length %d",
497 length, pdu_length+4));
498 cifs_reconnect(server);
499 csocket = server->ssocket;
500 wake_up(&server->response_q);
501 continue;
502 }
503
504 /* else length ok */
505 reconnect = 0;
506
507 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) {
508 isLargeBuf = true;
509 memcpy(bigbuf, smallbuf, 4);
510 smb_buffer = bigbuf;
511 }
512 length = 0;
513 iov.iov_base = 4 + (char *)smb_buffer;
514 iov.iov_len = pdu_length;
515 for (total_read = 0; total_read < pdu_length;
516 total_read += length) {
517 length = kernel_recvmsg(csocket, &smb_msg, &iov, 1,
518 pdu_length - total_read, 0);
519 if ((server->tcpStatus == CifsExiting) ||
520 (length == -EINTR)) {
521 /* then will exit */
522 reconnect = 2;
523 break;
524 } else if (server->tcpStatus == CifsNeedReconnect) {
525 cifs_reconnect(server);
526 csocket = server->ssocket;
527 /* Reconnect wakes up rspns q */
528 /* Now we will reread sock */
529 reconnect = 1;
530 break;
531 } else if ((length == -ERESTARTSYS) ||
532 (length == -EAGAIN)) {
533 msleep(1); /* minimum sleep to prevent looping,
534 allowing socket to clear and app
535 threads to set tcpStatus
536 CifsNeedReconnect if server hung*/
537 length = 0;
538 continue;
539 } else if (length <= 0) {
540 cERROR(1, ("Received no data, expecting %d",
541 pdu_length - total_read));
542 cifs_reconnect(server);
543 csocket = server->ssocket;
544 reconnect = 1;
545 break;
546 }
547 }
548 if (reconnect == 2)
549 break;
550 else if (reconnect == 1)
551 continue;
552
553 length += 4; /* account for rfc1002 hdr */
554
555
556 dump_smb(smb_buffer, length);
557 if (checkSMB(smb_buffer, smb_buffer->Mid, total_read+4)) {
558 cifs_dump_mem("Bad SMB: ", smb_buffer, 48);
559 continue;
560 }
561
562
563 task_to_wake = NULL;
564 spin_lock(&GlobalMid_Lock);
565 list_for_each(tmp, &server->pending_mid_q) {
566 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
567
568 if ((mid_entry->mid == smb_buffer->Mid) &&
569 (mid_entry->midState == MID_REQUEST_SUBMITTED) &&
570 (mid_entry->command == smb_buffer->Command)) {
571 if (check2ndT2(smb_buffer,server->maxBuf) > 0) {
572 /* We have a multipart transact2 resp */
573 isMultiRsp = true;
574 if (mid_entry->resp_buf) {
575 /* merge response - fix up 1st*/
576 if (coalesce_t2(smb_buffer,
577 mid_entry->resp_buf)) {
578 mid_entry->multiRsp =
579 true;
580 break;
581 } else {
582 /* all parts received */
583 mid_entry->multiEnd =
584 true;
585 goto multi_t2_fnd;
586 }
587 } else {
588 if (!isLargeBuf) {
589 cERROR(1,("1st trans2 resp needs bigbuf"));
590 /* BB maybe we can fix this up, switch
591 to already allocated large buffer? */
592 } else {
593 /* Have first buffer */
594 mid_entry->resp_buf =
595 smb_buffer;
596 mid_entry->largeBuf =
597 true;
598 bigbuf = NULL;
599 }
600 }
601 break;
602 }
603 mid_entry->resp_buf = smb_buffer;
604 mid_entry->largeBuf = isLargeBuf;
605 multi_t2_fnd:
606 task_to_wake = mid_entry->tsk;
607 mid_entry->midState = MID_RESPONSE_RECEIVED;
608 #ifdef CONFIG_CIFS_STATS2
609 mid_entry->when_received = jiffies;
610 #endif
611 /* so we do not time out requests to server
612 which is still responding (since server could
613 be busy but not dead) */
614 server->lstrp = jiffies;
615 break;
616 }
617 }
618 spin_unlock(&GlobalMid_Lock);
619 if (task_to_wake) {
620 /* Was previous buf put in mpx struct for multi-rsp? */
621 if (!isMultiRsp) {
622 /* smb buffer will be freed by user thread */
623 if (isLargeBuf)
624 bigbuf = NULL;
625 else
626 smallbuf = NULL;
627 }
628 wake_up_process(task_to_wake);
629 } else if (!is_valid_oplock_break(smb_buffer, server) &&
630 !isMultiRsp) {
631 cERROR(1, ("No task to wake, unknown frame received! "
632 "NumMids %d", midCount.counter));
633 cifs_dump_mem("Received Data is: ", (char *)smb_buffer,
634 sizeof(struct smb_hdr));
635 #ifdef CONFIG_CIFS_DEBUG2
636 cifs_dump_detail(smb_buffer);
637 cifs_dump_mids(server);
638 #endif /* CIFS_DEBUG2 */
639
640 }
641 } /* end while !EXITING */
642
643 /* take it off the list, if it's not already */
644 write_lock(&cifs_tcp_ses_lock);
645 list_del_init(&server->tcp_ses_list);
646 write_unlock(&cifs_tcp_ses_lock);
647
648 spin_lock(&GlobalMid_Lock);
649 server->tcpStatus = CifsExiting;
650 spin_unlock(&GlobalMid_Lock);
651 wake_up_all(&server->response_q);
652
653 /* check if we have blocked requests that need to free */
654 /* Note that cifs_max_pending is normally 50, but
655 can be set at module install time to as little as two */
656 spin_lock(&GlobalMid_Lock);
657 if (atomic_read(&server->inFlight) >= cifs_max_pending)
658 atomic_set(&server->inFlight, cifs_max_pending - 1);
659 /* We do not want to set the max_pending too low or we
660 could end up with the counter going negative */
661 spin_unlock(&GlobalMid_Lock);
662 /* Although there should not be any requests blocked on
663 this queue it can not hurt to be paranoid and try to wake up requests
664 that may haven been blocked when more than 50 at time were on the wire
665 to the same server - they now will see the session is in exit state
666 and get out of SendReceive. */
667 wake_up_all(&server->request_q);
668 /* give those requests time to exit */
669 msleep(125);
670
671 if (server->ssocket) {
672 sock_release(csocket);
673 server->ssocket = NULL;
674 }
675 /* buffer usuallly freed in free_mid - need to free it here on exit */
676 cifs_buf_release(bigbuf);
677 if (smallbuf) /* no sense logging a debug message if NULL */
678 cifs_small_buf_release(smallbuf);
679
680 /*
681 * BB: we shouldn't have to do any of this. It shouldn't be
682 * possible to exit from the thread with active SMB sessions
683 */
684 read_lock(&cifs_tcp_ses_lock);
685 if (list_empty(&server->pending_mid_q)) {
686 /* loop through server session structures attached to this and
687 mark them dead */
688 list_for_each(tmp, &server->smb_ses_list) {
689 ses = list_entry(tmp, struct cifsSesInfo,
690 smb_ses_list);
691 ses->status = CifsExiting;
692 ses->server = NULL;
693 }
694 read_unlock(&cifs_tcp_ses_lock);
695 } else {
696 /* although we can not zero the server struct pointer yet,
697 since there are active requests which may depnd on them,
698 mark the corresponding SMB sessions as exiting too */
699 list_for_each(tmp, &server->smb_ses_list) {
700 ses = list_entry(tmp, struct cifsSesInfo,
701 smb_ses_list);
702 ses->status = CifsExiting;
703 }
704
705 spin_lock(&GlobalMid_Lock);
706 list_for_each(tmp, &server->pending_mid_q) {
707 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
708 if (mid_entry->midState == MID_REQUEST_SUBMITTED) {
709 cFYI(1, ("Clearing Mid 0x%x - waking up ",
710 mid_entry->mid));
711 task_to_wake = mid_entry->tsk;
712 if (task_to_wake)
713 wake_up_process(task_to_wake);
714 }
715 }
716 spin_unlock(&GlobalMid_Lock);
717 read_unlock(&cifs_tcp_ses_lock);
718 /* 1/8th of sec is more than enough time for them to exit */
719 msleep(125);
720 }
721
722 if (!list_empty(&server->pending_mid_q)) {
723 /* mpx threads have not exited yet give them
724 at least the smb send timeout time for long ops */
725 /* due to delays on oplock break requests, we need
726 to wait at least 45 seconds before giving up
727 on a request getting a response and going ahead
728 and killing cifsd */
729 cFYI(1, ("Wait for exit from demultiplex thread"));
730 msleep(46000);
731 /* if threads still have not exited they are probably never
732 coming home not much else we can do but free the memory */
733 }
734
735 /* last chance to mark ses pointers invalid
736 if there are any pointing to this (e.g
737 if a crazy root user tried to kill cifsd
738 kernel thread explicitly this might happen) */
739 /* BB: This shouldn't be necessary, see above */
740 read_lock(&cifs_tcp_ses_lock);
741 list_for_each(tmp, &server->smb_ses_list) {
742 ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list);
743 ses->server = NULL;
744 }
745 read_unlock(&cifs_tcp_ses_lock);
746
747 kfree(server->hostname);
748 task_to_wake = xchg(&server->tsk, NULL);
749 kfree(server);
750
751 length = atomic_dec_return(&tcpSesAllocCount);
752 if (length > 0)
753 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
754 GFP_KERNEL);
755
756 /* if server->tsk was NULL then wait for a signal before exiting */
757 if (!task_to_wake) {
758 set_current_state(TASK_INTERRUPTIBLE);
759 while (!signal_pending(current)) {
760 schedule();
761 set_current_state(TASK_INTERRUPTIBLE);
762 }
763 set_current_state(TASK_RUNNING);
764 }
765
766 module_put_and_exit(0);
767 }
768
769 /* extract the host portion of the UNC string */
770 static char *
771 extract_hostname(const char *unc)
772 {
773 const char *src;
774 char *dst, *delim;
775 unsigned int len;
776
777 /* skip double chars at beginning of string */
778 /* BB: check validity of these bytes? */
779 src = unc + 2;
780
781 /* delimiter between hostname and sharename is always '\\' now */
782 delim = strchr(src, '\\');
783 if (!delim)
784 return ERR_PTR(-EINVAL);
785
786 len = delim - src;
787 dst = kmalloc((len + 1), GFP_KERNEL);
788 if (dst == NULL)
789 return ERR_PTR(-ENOMEM);
790
791 memcpy(dst, src, len);
792 dst[len] = '\0';
793
794 return dst;
795 }
796
797 static int
798 cifs_parse_mount_options(char *options, const char *devname,
799 struct smb_vol *vol)
800 {
801 char *value;
802 char *data;
803 unsigned int temp_len, i, j;
804 char separator[2];
805
806 separator[0] = ',';
807 separator[1] = 0;
808
809 if (Local_System_Name[0] != 0)
810 memcpy(vol->source_rfc1001_name, Local_System_Name, 15);
811 else {
812 char *nodename = utsname()->nodename;
813 int n = strnlen(nodename, 15);
814 memset(vol->source_rfc1001_name, 0x20, 15);
815 for (i = 0; i < n; i++) {
816 /* does not have to be perfect mapping since field is
817 informational, only used for servers that do not support
818 port 445 and it can be overridden at mount time */
819 vol->source_rfc1001_name[i] = toupper(nodename[i]);
820 }
821 }
822 vol->source_rfc1001_name[15] = 0;
823 /* null target name indicates to use *SMBSERVR default called name
824 if we end up sending RFC1001 session initialize */
825 vol->target_rfc1001_name[0] = 0;
826 vol->linux_uid = current_uid(); /* use current_euid() instead? */
827 vol->linux_gid = current_gid();
828 vol->dir_mode = S_IRWXUGO;
829 /* 2767 perms indicate mandatory locking support */
830 vol->file_mode = (S_IRWXUGO | S_ISGID) & (~S_IXGRP);
831
832 /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */
833 vol->rw = true;
834 /* default is always to request posix paths. */
835 vol->posix_paths = 1;
836
837 if (!options)
838 return 1;
839
840 if (strncmp(options, "sep=", 4) == 0) {
841 if (options[4] != 0) {
842 separator[0] = options[4];
843 options += 5;
844 } else {
845 cFYI(1, ("Null separator not allowed"));
846 }
847 }
848
849 while ((data = strsep(&options, separator)) != NULL) {
850 if (!*data)
851 continue;
852 if ((value = strchr(data, '=')) != NULL)
853 *value++ = '\0';
854
855 /* Have to parse this before we parse for "user" */
856 if (strnicmp(data, "user_xattr", 10) == 0) {
857 vol->no_xattr = 0;
858 } else if (strnicmp(data, "nouser_xattr", 12) == 0) {
859 vol->no_xattr = 1;
860 } else if (strnicmp(data, "user", 4) == 0) {
861 if (!value) {
862 printk(KERN_WARNING
863 "CIFS: invalid or missing username\n");
864 return 1; /* needs_arg; */
865 } else if (!*value) {
866 /* null user, ie anonymous, authentication */
867 vol->nullauth = 1;
868 }
869 if (strnlen(value, 200) < 200) {
870 vol->username = value;
871 } else {
872 printk(KERN_WARNING "CIFS: username too long\n");
873 return 1;
874 }
875 } else if (strnicmp(data, "pass", 4) == 0) {
876 if (!value) {
877 vol->password = NULL;
878 continue;
879 } else if (value[0] == 0) {
880 /* check if string begins with double comma
881 since that would mean the password really
882 does start with a comma, and would not
883 indicate an empty string */
884 if (value[1] != separator[0]) {
885 vol->password = NULL;
886 continue;
887 }
888 }
889 temp_len = strlen(value);
890 /* removed password length check, NTLM passwords
891 can be arbitrarily long */
892
893 /* if comma in password, the string will be
894 prematurely null terminated. Commas in password are
895 specified across the cifs mount interface by a double
896 comma ie ,, and a comma used as in other cases ie ','
897 as a parameter delimiter/separator is single and due
898 to the strsep above is temporarily zeroed. */
899
900 /* NB: password legally can have multiple commas and
901 the only illegal character in a password is null */
902
903 if ((value[temp_len] == 0) &&
904 (value[temp_len+1] == separator[0])) {
905 /* reinsert comma */
906 value[temp_len] = separator[0];
907 temp_len += 2; /* move after second comma */
908 while (value[temp_len] != 0) {
909 if (value[temp_len] == separator[0]) {
910 if (value[temp_len+1] ==
911 separator[0]) {
912 /* skip second comma */
913 temp_len++;
914 } else {
915 /* single comma indicating start
916 of next parm */
917 break;
918 }
919 }
920 temp_len++;
921 }
922 if (value[temp_len] == 0) {
923 options = NULL;
924 } else {
925 value[temp_len] = 0;
926 /* point option to start of next parm */
927 options = value + temp_len + 1;
928 }
929 /* go from value to value + temp_len condensing
930 double commas to singles. Note that this ends up
931 allocating a few bytes too many, which is ok */
932 vol->password = kzalloc(temp_len, GFP_KERNEL);
933 if (vol->password == NULL) {
934 printk(KERN_WARNING "CIFS: no memory "
935 "for password\n");
936 return 1;
937 }
938 for (i = 0, j = 0; i < temp_len; i++, j++) {
939 vol->password[j] = value[i];
940 if (value[i] == separator[0]
941 && value[i+1] == separator[0]) {
942 /* skip second comma */
943 i++;
944 }
945 }
946 vol->password[j] = 0;
947 } else {
948 vol->password = kzalloc(temp_len+1, GFP_KERNEL);
949 if (vol->password == NULL) {
950 printk(KERN_WARNING "CIFS: no memory "
951 "for password\n");
952 return 1;
953 }
954 strcpy(vol->password, value);
955 }
956 } else if (strnicmp(data, "ip", 2) == 0) {
957 if (!value || !*value) {
958 vol->UNCip = NULL;
959 } else if (strnlen(value, 35) < 35) {
960 vol->UNCip = value;
961 } else {
962 printk(KERN_WARNING "CIFS: ip address "
963 "too long\n");
964 return 1;
965 }
966 } else if (strnicmp(data, "sec", 3) == 0) {
967 if (!value || !*value) {
968 cERROR(1, ("no security value specified"));
969 continue;
970 } else if (strnicmp(value, "krb5i", 5) == 0) {
971 vol->secFlg |= CIFSSEC_MAY_KRB5 |
972 CIFSSEC_MUST_SIGN;
973 } else if (strnicmp(value, "krb5p", 5) == 0) {
974 /* vol->secFlg |= CIFSSEC_MUST_SEAL |
975 CIFSSEC_MAY_KRB5; */
976 cERROR(1, ("Krb5 cifs privacy not supported"));
977 return 1;
978 } else if (strnicmp(value, "krb5", 4) == 0) {
979 vol->secFlg |= CIFSSEC_MAY_KRB5;
980 } else if (strnicmp(value, "ntlmv2i", 7) == 0) {
981 vol->secFlg |= CIFSSEC_MAY_NTLMV2 |
982 CIFSSEC_MUST_SIGN;
983 } else if (strnicmp(value, "ntlmv2", 6) == 0) {
984 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
985 } else if (strnicmp(value, "ntlmi", 5) == 0) {
986 vol->secFlg |= CIFSSEC_MAY_NTLM |
987 CIFSSEC_MUST_SIGN;
988 } else if (strnicmp(value, "ntlm", 4) == 0) {
989 /* ntlm is default so can be turned off too */
990 vol->secFlg |= CIFSSEC_MAY_NTLM;
991 } else if (strnicmp(value, "nontlm", 6) == 0) {
992 /* BB is there a better way to do this? */
993 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
994 #ifdef CONFIG_CIFS_WEAK_PW_HASH
995 } else if (strnicmp(value, "lanman", 6) == 0) {
996 vol->secFlg |= CIFSSEC_MAY_LANMAN;
997 #endif
998 } else if (strnicmp(value, "none", 4) == 0) {
999 vol->nullauth = 1;
1000 } else {
1001 cERROR(1, ("bad security option: %s", value));
1002 return 1;
1003 }
1004 } else if ((strnicmp(data, "unc", 3) == 0)
1005 || (strnicmp(data, "target", 6) == 0)
1006 || (strnicmp(data, "path", 4) == 0)) {
1007 if (!value || !*value) {
1008 printk(KERN_WARNING "CIFS: invalid path to "
1009 "network resource\n");
1010 return 1; /* needs_arg; */
1011 }
1012 if ((temp_len = strnlen(value, 300)) < 300) {
1013 vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
1014 if (vol->UNC == NULL)
1015 return 1;
1016 strcpy(vol->UNC, value);
1017 if (strncmp(vol->UNC, "//", 2) == 0) {
1018 vol->UNC[0] = '\\';
1019 vol->UNC[1] = '\\';
1020 } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
1021 printk(KERN_WARNING
1022 "CIFS: UNC Path does not begin "
1023 "with // or \\\\ \n");
1024 return 1;
1025 }
1026 } else {
1027 printk(KERN_WARNING "CIFS: UNC name too long\n");
1028 return 1;
1029 }
1030 } else if ((strnicmp(data, "domain", 3) == 0)
1031 || (strnicmp(data, "workgroup", 5) == 0)) {
1032 if (!value || !*value) {
1033 printk(KERN_WARNING "CIFS: invalid domain name\n");
1034 return 1; /* needs_arg; */
1035 }
1036 /* BB are there cases in which a comma can be valid in
1037 a domain name and need special handling? */
1038 if (strnlen(value, 256) < 256) {
1039 vol->domainname = value;
1040 cFYI(1, ("Domain name set"));
1041 } else {
1042 printk(KERN_WARNING "CIFS: domain name too "
1043 "long\n");
1044 return 1;
1045 }
1046 } else if (strnicmp(data, "prefixpath", 10) == 0) {
1047 if (!value || !*value) {
1048 printk(KERN_WARNING
1049 "CIFS: invalid path prefix\n");
1050 return 1; /* needs_argument */
1051 }
1052 if ((temp_len = strnlen(value, 1024)) < 1024) {
1053 if (value[0] != '/')
1054 temp_len++; /* missing leading slash */
1055 vol->prepath = kmalloc(temp_len+1, GFP_KERNEL);
1056 if (vol->prepath == NULL)
1057 return 1;
1058 if (value[0] != '/') {
1059 vol->prepath[0] = '/';
1060 strcpy(vol->prepath+1, value);
1061 } else
1062 strcpy(vol->prepath, value);
1063 cFYI(1, ("prefix path %s", vol->prepath));
1064 } else {
1065 printk(KERN_WARNING "CIFS: prefix too long\n");
1066 return 1;
1067 }
1068 } else if (strnicmp(data, "iocharset", 9) == 0) {
1069 if (!value || !*value) {
1070 printk(KERN_WARNING "CIFS: invalid iocharset "
1071 "specified\n");
1072 return 1; /* needs_arg; */
1073 }
1074 if (strnlen(value, 65) < 65) {
1075 if (strnicmp(value, "default", 7))
1076 vol->iocharset = value;
1077 /* if iocharset not set then load_nls_default
1078 is used by caller */
1079 cFYI(1, ("iocharset set to %s", value));
1080 } else {
1081 printk(KERN_WARNING "CIFS: iocharset name "
1082 "too long.\n");
1083 return 1;
1084 }
1085 } else if (strnicmp(data, "uid", 3) == 0) {
1086 if (value && *value) {
1087 vol->linux_uid =
1088 simple_strtoul(value, &value, 0);
1089 vol->override_uid = 1;
1090 }
1091 } else if (strnicmp(data, "gid", 3) == 0) {
1092 if (value && *value) {
1093 vol->linux_gid =
1094 simple_strtoul(value, &value, 0);
1095 vol->override_gid = 1;
1096 }
1097 } else if (strnicmp(data, "file_mode", 4) == 0) {
1098 if (value && *value) {
1099 vol->file_mode =
1100 simple_strtoul(value, &value, 0);
1101 }
1102 } else if (strnicmp(data, "dir_mode", 4) == 0) {
1103 if (value && *value) {
1104 vol->dir_mode =
1105 simple_strtoul(value, &value, 0);
1106 }
1107 } else if (strnicmp(data, "dirmode", 4) == 0) {
1108 if (value && *value) {
1109 vol->dir_mode =
1110 simple_strtoul(value, &value, 0);
1111 }
1112 } else if (strnicmp(data, "port", 4) == 0) {
1113 if (value && *value) {
1114 vol->port =
1115 simple_strtoul(value, &value, 0);
1116 }
1117 } else if (strnicmp(data, "rsize", 5) == 0) {
1118 if (value && *value) {
1119 vol->rsize =
1120 simple_strtoul(value, &value, 0);
1121 }
1122 } else if (strnicmp(data, "wsize", 5) == 0) {
1123 if (value && *value) {
1124 vol->wsize =
1125 simple_strtoul(value, &value, 0);
1126 }
1127 } else if (strnicmp(data, "sockopt", 5) == 0) {
1128 if (value && *value) {
1129 vol->sockopt =
1130 simple_strtoul(value, &value, 0);
1131 }
1132 } else if (strnicmp(data, "netbiosname", 4) == 0) {
1133 if (!value || !*value || (*value == ' ')) {
1134 cFYI(1, ("invalid (empty) netbiosname"));
1135 } else {
1136 memset(vol->source_rfc1001_name, 0x20, 15);
1137 for (i = 0; i < 15; i++) {
1138 /* BB are there cases in which a comma can be
1139 valid in this workstation netbios name (and need
1140 special handling)? */
1141
1142 /* We do not uppercase netbiosname for user */
1143 if (value[i] == 0)
1144 break;
1145 else
1146 vol->source_rfc1001_name[i] =
1147 value[i];
1148 }
1149 /* The string has 16th byte zero still from
1150 set at top of the function */
1151 if ((i == 15) && (value[i] != 0))
1152 printk(KERN_WARNING "CIFS: netbiosname"
1153 " longer than 15 truncated.\n");
1154 }
1155 } else if (strnicmp(data, "servern", 7) == 0) {
1156 /* servernetbiosname specified override *SMBSERVER */
1157 if (!value || !*value || (*value == ' ')) {
1158 cFYI(1, ("empty server netbiosname specified"));
1159 } else {
1160 /* last byte, type, is 0x20 for servr type */
1161 memset(vol->target_rfc1001_name, 0x20, 16);
1162
1163 for (i = 0; i < 15; i++) {
1164 /* BB are there cases in which a comma can be
1165 valid in this workstation netbios name
1166 (and need special handling)? */
1167
1168 /* user or mount helper must uppercase
1169 the netbiosname */
1170 if (value[i] == 0)
1171 break;
1172 else
1173 vol->target_rfc1001_name[i] =
1174 value[i];
1175 }
1176 /* The string has 16th byte zero still from
1177 set at top of the function */
1178 if ((i == 15) && (value[i] != 0))
1179 printk(KERN_WARNING "CIFS: server net"
1180 "biosname longer than 15 truncated.\n");
1181 }
1182 } else if (strnicmp(data, "credentials", 4) == 0) {
1183 /* ignore */
1184 } else if (strnicmp(data, "version", 3) == 0) {
1185 /* ignore */
1186 } else if (strnicmp(data, "guest", 5) == 0) {
1187 /* ignore */
1188 } else if (strnicmp(data, "rw", 2) == 0) {
1189 vol->rw = true;
1190 } else if (strnicmp(data, "noblocksend", 11) == 0) {
1191 vol->noblocksnd = 1;
1192 } else if (strnicmp(data, "noautotune", 10) == 0) {
1193 vol->noautotune = 1;
1194 } else if ((strnicmp(data, "suid", 4) == 0) ||
1195 (strnicmp(data, "nosuid", 6) == 0) ||
1196 (strnicmp(data, "exec", 4) == 0) ||
1197 (strnicmp(data, "noexec", 6) == 0) ||
1198 (strnicmp(data, "nodev", 5) == 0) ||
1199 (strnicmp(data, "noauto", 6) == 0) ||
1200 (strnicmp(data, "dev", 3) == 0)) {
1201 /* The mount tool or mount.cifs helper (if present)
1202 uses these opts to set flags, and the flags are read
1203 by the kernel vfs layer before we get here (ie
1204 before read super) so there is no point trying to
1205 parse these options again and set anything and it
1206 is ok to just ignore them */
1207 continue;
1208 } else if (strnicmp(data, "ro", 2) == 0) {
1209 vol->rw = false;
1210 } else if (strnicmp(data, "hard", 4) == 0) {
1211 vol->retry = 1;
1212 } else if (strnicmp(data, "soft", 4) == 0) {
1213 vol->retry = 0;
1214 } else if (strnicmp(data, "perm", 4) == 0) {
1215 vol->noperm = 0;
1216 } else if (strnicmp(data, "noperm", 6) == 0) {
1217 vol->noperm = 1;
1218 } else if (strnicmp(data, "mapchars", 8) == 0) {
1219 vol->remap = 1;
1220 } else if (strnicmp(data, "nomapchars", 10) == 0) {
1221 vol->remap = 0;
1222 } else if (strnicmp(data, "sfu", 3) == 0) {
1223 vol->sfu_emul = 1;
1224 } else if (strnicmp(data, "nosfu", 5) == 0) {
1225 vol->sfu_emul = 0;
1226 } else if (strnicmp(data, "nodfs", 5) == 0) {
1227 vol->nodfs = 1;
1228 } else if (strnicmp(data, "posixpaths", 10) == 0) {
1229 vol->posix_paths = 1;
1230 } else if (strnicmp(data, "noposixpaths", 12) == 0) {
1231 vol->posix_paths = 0;
1232 } else if (strnicmp(data, "nounix", 6) == 0) {
1233 vol->no_linux_ext = 1;
1234 } else if (strnicmp(data, "nolinux", 7) == 0) {
1235 vol->no_linux_ext = 1;
1236 } else if ((strnicmp(data, "nocase", 6) == 0) ||
1237 (strnicmp(data, "ignorecase", 10) == 0)) {
1238 vol->nocase = 1;
1239 } else if (strnicmp(data, "brl", 3) == 0) {
1240 vol->nobrl = 0;
1241 } else if ((strnicmp(data, "nobrl", 5) == 0) ||
1242 (strnicmp(data, "nolock", 6) == 0)) {
1243 vol->nobrl = 1;
1244 /* turn off mandatory locking in mode
1245 if remote locking is turned off since the
1246 local vfs will do advisory */
1247 if (vol->file_mode ==
1248 (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
1249 vol->file_mode = S_IALLUGO;
1250 } else if (strnicmp(data, "forcemandatorylock", 9) == 0) {
1251 /* will take the shorter form "forcemand" as well */
1252 /* This mount option will force use of mandatory
1253 (DOS/Windows style) byte range locks, instead of
1254 using posix advisory byte range locks, even if the
1255 Unix extensions are available and posix locks would
1256 be supported otherwise. If Unix extensions are not
1257 negotiated this has no effect since mandatory locks
1258 would be used (mandatory locks is all that those
1259 those servers support) */
1260 vol->mand_lock = 1;
1261 } else if (strnicmp(data, "setuids", 7) == 0) {
1262 vol->setuids = 1;
1263 } else if (strnicmp(data, "nosetuids", 9) == 0) {
1264 vol->setuids = 0;
1265 } else if (strnicmp(data, "dynperm", 7) == 0) {
1266 vol->dynperm = true;
1267 } else if (strnicmp(data, "nodynperm", 9) == 0) {
1268 vol->dynperm = false;
1269 } else if (strnicmp(data, "nohard", 6) == 0) {
1270 vol->retry = 0;
1271 } else if (strnicmp(data, "nosoft", 6) == 0) {
1272 vol->retry = 1;
1273 } else if (strnicmp(data, "nointr", 6) == 0) {
1274 vol->intr = 0;
1275 } else if (strnicmp(data, "intr", 4) == 0) {
1276 vol->intr = 1;
1277 } else if (strnicmp(data, "serverino", 7) == 0) {
1278 vol->server_ino = 1;
1279 } else if (strnicmp(data, "noserverino", 9) == 0) {
1280 vol->server_ino = 0;
1281 } else if (strnicmp(data, "cifsacl", 7) == 0) {
1282 vol->cifs_acl = 1;
1283 } else if (strnicmp(data, "nocifsacl", 9) == 0) {
1284 vol->cifs_acl = 0;
1285 } else if (strnicmp(data, "acl", 3) == 0) {
1286 vol->no_psx_acl = 0;
1287 } else if (strnicmp(data, "noacl", 5) == 0) {
1288 vol->no_psx_acl = 1;
1289 #ifdef CONFIG_CIFS_EXPERIMENTAL
1290 } else if (strnicmp(data, "locallease", 6) == 0) {
1291 vol->local_lease = 1;
1292 #endif
1293 } else if (strnicmp(data, "sign", 4) == 0) {
1294 vol->secFlg |= CIFSSEC_MUST_SIGN;
1295 } else if (strnicmp(data, "seal", 4) == 0) {
1296 /* we do not do the following in secFlags because seal
1297 is a per tree connection (mount) not a per socket
1298 or per-smb connection option in the protocol */
1299 /* vol->secFlg |= CIFSSEC_MUST_SEAL; */
1300 vol->seal = 1;
1301 } else if (strnicmp(data, "direct", 6) == 0) {
1302 vol->direct_io = 1;
1303 } else if (strnicmp(data, "forcedirectio", 13) == 0) {
1304 vol->direct_io = 1;
1305 } else if (strnicmp(data, "in6_addr", 8) == 0) {
1306 if (!value || !*value) {
1307 vol->in6_addr = NULL;
1308 } else if (strnlen(value, 49) == 48) {
1309 vol->in6_addr = value;
1310 } else {
1311 printk(KERN_WARNING "CIFS: ip v6 address not "
1312 "48 characters long\n");
1313 return 1;
1314 }
1315 } else if (strnicmp(data, "noac", 4) == 0) {
1316 printk(KERN_WARNING "CIFS: Mount option noac not "
1317 "supported. Instead set "
1318 "/proc/fs/cifs/LookupCacheEnabled to 0\n");
1319 } else
1320 printk(KERN_WARNING "CIFS: Unknown mount option %s\n",
1321 data);
1322 }
1323 if (vol->UNC == NULL) {
1324 if (devname == NULL) {
1325 printk(KERN_WARNING "CIFS: Missing UNC name for mount "
1326 "target\n");
1327 return 1;
1328 }
1329 if ((temp_len = strnlen(devname, 300)) < 300) {
1330 vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
1331 if (vol->UNC == NULL)
1332 return 1;
1333 strcpy(vol->UNC, devname);
1334 if (strncmp(vol->UNC, "//", 2) == 0) {
1335 vol->UNC[0] = '\\';
1336 vol->UNC[1] = '\\';
1337 } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
1338 printk(KERN_WARNING "CIFS: UNC Path does not "
1339 "begin with // or \\\\ \n");
1340 return 1;
1341 }
1342 value = strpbrk(vol->UNC+2, "/\\");
1343 if (value)
1344 *value = '\\';
1345 } else {
1346 printk(KERN_WARNING "CIFS: UNC name too long\n");
1347 return 1;
1348 }
1349 }
1350 if (vol->UNCip == NULL)
1351 vol->UNCip = &vol->UNC[2];
1352
1353 return 0;
1354 }
1355
1356 static struct TCP_Server_Info *
1357 cifs_find_tcp_session(struct sockaddr_storage *addr)
1358 {
1359 struct list_head *tmp;
1360 struct TCP_Server_Info *server;
1361 struct sockaddr_in *addr4 = (struct sockaddr_in *) addr;
1362 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *) addr;
1363
1364 write_lock(&cifs_tcp_ses_lock);
1365 list_for_each(tmp, &cifs_tcp_ses_list) {
1366 server = list_entry(tmp, struct TCP_Server_Info,
1367 tcp_ses_list);
1368 /*
1369 * the demux thread can exit on its own while still in CifsNew
1370 * so don't accept any sockets in that state. Since the
1371 * tcpStatus never changes back to CifsNew it's safe to check
1372 * for this without a lock.
1373 */
1374 if (server->tcpStatus == CifsNew)
1375 continue;
1376
1377 if (addr->ss_family == AF_INET &&
1378 (addr4->sin_addr.s_addr !=
1379 server->addr.sockAddr.sin_addr.s_addr))
1380 continue;
1381 else if (addr->ss_family == AF_INET6 &&
1382 !ipv6_addr_equal(&server->addr.sockAddr6.sin6_addr,
1383 &addr6->sin6_addr))
1384 continue;
1385
1386 ++server->srv_count;
1387 write_unlock(&cifs_tcp_ses_lock);
1388 cFYI(1, ("Existing tcp session with server found"));
1389 return server;
1390 }
1391 write_unlock(&cifs_tcp_ses_lock);
1392 return NULL;
1393 }
1394
1395 static void
1396 cifs_put_tcp_session(struct TCP_Server_Info *server)
1397 {
1398 struct task_struct *task;
1399
1400 write_lock(&cifs_tcp_ses_lock);
1401 if (--server->srv_count > 0) {
1402 write_unlock(&cifs_tcp_ses_lock);
1403 return;
1404 }
1405
1406 list_del_init(&server->tcp_ses_list);
1407 write_unlock(&cifs_tcp_ses_lock);
1408
1409 spin_lock(&GlobalMid_Lock);
1410 server->tcpStatus = CifsExiting;
1411 spin_unlock(&GlobalMid_Lock);
1412
1413 task = xchg(&server->tsk, NULL);
1414 if (task)
1415 force_sig(SIGKILL, task);
1416 }
1417
1418 static struct TCP_Server_Info *
1419 cifs_get_tcp_session(struct smb_vol *volume_info)
1420 {
1421 struct TCP_Server_Info *tcp_ses = NULL;
1422 struct sockaddr_storage addr;
1423 struct sockaddr_in *sin_server = (struct sockaddr_in *) &addr;
1424 struct sockaddr_in6 *sin_server6 = (struct sockaddr_in6 *) &addr;
1425 int rc;
1426
1427 memset(&addr, 0, sizeof(struct sockaddr_storage));
1428
1429 if (volume_info->UNCip && volume_info->UNC) {
1430 rc = cifs_inet_pton(AF_INET, volume_info->UNCip,
1431 &sin_server->sin_addr.s_addr);
1432
1433 if (rc <= 0) {
1434 /* not ipv4 address, try ipv6 */
1435 rc = cifs_inet_pton(AF_INET6, volume_info->UNCip,
1436 &sin_server6->sin6_addr.in6_u);
1437 if (rc > 0)
1438 addr.ss_family = AF_INET6;
1439 } else {
1440 addr.ss_family = AF_INET;
1441 }
1442
1443 if (rc <= 0) {
1444 /* we failed translating address */
1445 rc = -EINVAL;
1446 goto out_err;
1447 }
1448
1449 cFYI(1, ("UNC: %s ip: %s", volume_info->UNC,
1450 volume_info->UNCip));
1451 } else if (volume_info->UNCip) {
1452 /* BB using ip addr as tcp_ses name to connect to the
1453 DFS root below */
1454 cERROR(1, ("Connecting to DFS root not implemented yet"));
1455 rc = -EINVAL;
1456 goto out_err;
1457 } else /* which tcp_sess DFS root would we conect to */ {
1458 cERROR(1,
1459 ("CIFS mount error: No UNC path (e.g. -o "
1460 "unc=//192.168.1.100/public) specified"));
1461 rc = -EINVAL;
1462 goto out_err;
1463 }
1464
1465 /* see if we already have a matching tcp_ses */
1466 tcp_ses = cifs_find_tcp_session(&addr);
1467 if (tcp_ses)
1468 return tcp_ses;
1469
1470 tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL);
1471 if (!tcp_ses) {
1472 rc = -ENOMEM;
1473 goto out_err;
1474 }
1475
1476 tcp_ses->hostname = extract_hostname(volume_info->UNC);
1477 if (IS_ERR(tcp_ses->hostname)) {
1478 rc = PTR_ERR(tcp_ses->hostname);
1479 goto out_err;
1480 }
1481
1482 tcp_ses->noblocksnd = volume_info->noblocksnd;
1483 tcp_ses->noautotune = volume_info->noautotune;
1484 atomic_set(&tcp_ses->inFlight, 0);
1485 init_waitqueue_head(&tcp_ses->response_q);
1486 init_waitqueue_head(&tcp_ses->request_q);
1487 INIT_LIST_HEAD(&tcp_ses->pending_mid_q);
1488 mutex_init(&tcp_ses->srv_mutex);
1489 memcpy(tcp_ses->workstation_RFC1001_name,
1490 volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
1491 memcpy(tcp_ses->server_RFC1001_name,
1492 volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
1493 tcp_ses->sequence_number = 0;
1494 INIT_LIST_HEAD(&tcp_ses->tcp_ses_list);
1495 INIT_LIST_HEAD(&tcp_ses->smb_ses_list);
1496
1497 /*
1498 * at this point we are the only ones with the pointer
1499 * to the struct since the kernel thread not created yet
1500 * no need to spinlock this init of tcpStatus or srv_count
1501 */
1502 tcp_ses->tcpStatus = CifsNew;
1503 ++tcp_ses->srv_count;
1504
1505 if (addr.ss_family == AF_INET6) {
1506 cFYI(1, ("attempting ipv6 connect"));
1507 /* BB should we allow ipv6 on port 139? */
1508 /* other OS never observed in Wild doing 139 with v6 */
1509 memcpy(&tcp_ses->addr.sockAddr6, sin_server6,
1510 sizeof(struct sockaddr_in6));
1511 sin_server6->sin6_port = htons(volume_info->port);
1512 rc = ipv6_connect(tcp_ses);
1513 } else {
1514 memcpy(&tcp_ses->addr.sockAddr, sin_server,
1515 sizeof(struct sockaddr_in));
1516 sin_server->sin_port = htons(volume_info->port);
1517 rc = ipv4_connect(tcp_ses);
1518 }
1519 if (rc < 0) {
1520 cERROR(1, ("Error connecting to socket. Aborting operation"));
1521 goto out_err;
1522 }
1523
1524 /*
1525 * since we're in a cifs function already, we know that
1526 * this will succeed. No need for try_module_get().
1527 */
1528 __module_get(THIS_MODULE);
1529 tcp_ses->tsk = kthread_run((void *)(void *)cifs_demultiplex_thread,
1530 tcp_ses, "cifsd");
1531 if (IS_ERR(tcp_ses->tsk)) {
1532 rc = PTR_ERR(tcp_ses->tsk);
1533 cERROR(1, ("error %d create cifsd thread", rc));
1534 module_put(THIS_MODULE);
1535 goto out_err;
1536 }
1537
1538 /* thread spawned, put it on the list */
1539 write_lock(&cifs_tcp_ses_lock);
1540 list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list);
1541 write_unlock(&cifs_tcp_ses_lock);
1542
1543 return tcp_ses;
1544
1545 out_err:
1546 if (tcp_ses) {
1547 kfree(tcp_ses->hostname);
1548 if (tcp_ses->ssocket)
1549 sock_release(tcp_ses->ssocket);
1550 kfree(tcp_ses);
1551 }
1552 return ERR_PTR(rc);
1553 }
1554
1555 static struct cifsSesInfo *
1556 cifs_find_smb_ses(struct TCP_Server_Info *server, char *username)
1557 {
1558 struct list_head *tmp;
1559 struct cifsSesInfo *ses;
1560
1561 write_lock(&cifs_tcp_ses_lock);
1562 list_for_each(tmp, &server->smb_ses_list) {
1563 ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list);
1564 if (strncmp(ses->userName, username, MAX_USERNAME_SIZE))
1565 continue;
1566
1567 ++ses->ses_count;
1568 write_unlock(&cifs_tcp_ses_lock);
1569 return ses;
1570 }
1571 write_unlock(&cifs_tcp_ses_lock);
1572 return NULL;
1573 }
1574
1575 static void
1576 cifs_put_smb_ses(struct cifsSesInfo *ses)
1577 {
1578 int xid;
1579 struct TCP_Server_Info *server = ses->server;
1580
1581 write_lock(&cifs_tcp_ses_lock);
1582 if (--ses->ses_count > 0) {
1583 write_unlock(&cifs_tcp_ses_lock);
1584 return;
1585 }
1586
1587 list_del_init(&ses->smb_ses_list);
1588 write_unlock(&cifs_tcp_ses_lock);
1589
1590 if (ses->status == CifsGood) {
1591 xid = GetXid();
1592 CIFSSMBLogoff(xid, ses);
1593 _FreeXid(xid);
1594 }
1595 sesInfoFree(ses);
1596 cifs_put_tcp_session(server);
1597 }
1598
1599 static struct cifsTconInfo *
1600 cifs_find_tcon(struct cifsSesInfo *ses, const char *unc)
1601 {
1602 struct list_head *tmp;
1603 struct cifsTconInfo *tcon;
1604
1605 write_lock(&cifs_tcp_ses_lock);
1606 list_for_each(tmp, &ses->tcon_list) {
1607 tcon = list_entry(tmp, struct cifsTconInfo, tcon_list);
1608 if (tcon->tidStatus == CifsExiting)
1609 continue;
1610 if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE))
1611 continue;
1612
1613 ++tcon->tc_count;
1614 write_unlock(&cifs_tcp_ses_lock);
1615 return tcon;
1616 }
1617 write_unlock(&cifs_tcp_ses_lock);
1618 return NULL;
1619 }
1620
1621 static void
1622 cifs_put_tcon(struct cifsTconInfo *tcon)
1623 {
1624 int xid;
1625 struct cifsSesInfo *ses = tcon->ses;
1626
1627 write_lock(&cifs_tcp_ses_lock);
1628 if (--tcon->tc_count > 0) {
1629 write_unlock(&cifs_tcp_ses_lock);
1630 return;
1631 }
1632
1633 list_del_init(&tcon->tcon_list);
1634 write_unlock(&cifs_tcp_ses_lock);
1635
1636 xid = GetXid();
1637 CIFSSMBTDis(xid, tcon);
1638 _FreeXid(xid);
1639
1640 DeleteTconOplockQEntries(tcon);
1641 tconInfoFree(tcon);
1642 cifs_put_smb_ses(ses);
1643 }
1644
1645 int
1646 get_dfs_path(int xid, struct cifsSesInfo *pSesInfo, const char *old_path,
1647 const struct nls_table *nls_codepage, unsigned int *pnum_referrals,
1648 struct dfs_info3_param **preferrals, int remap)
1649 {
1650 char *temp_unc;
1651 int rc = 0;
1652
1653 *pnum_referrals = 0;
1654 *preferrals = NULL;
1655
1656 if (pSesInfo->ipc_tid == 0) {
1657 temp_unc = kmalloc(2 /* for slashes */ +
1658 strnlen(pSesInfo->serverName,
1659 SERVER_NAME_LEN_WITH_NULL * 2)
1660 + 1 + 4 /* slash IPC$ */ + 2,
1661 GFP_KERNEL);
1662 if (temp_unc == NULL)
1663 return -ENOMEM;
1664 temp_unc[0] = '\\';
1665 temp_unc[1] = '\\';
1666 strcpy(temp_unc + 2, pSesInfo->serverName);
1667 strcpy(temp_unc + 2 + strlen(pSesInfo->serverName), "\\IPC$");
1668 rc = CIFSTCon(xid, pSesInfo, temp_unc, NULL, nls_codepage);
1669 cFYI(1,
1670 ("CIFS Tcon rc = %d ipc_tid = %d", rc, pSesInfo->ipc_tid));
1671 kfree(temp_unc);
1672 }
1673 if (rc == 0)
1674 rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, preferrals,
1675 pnum_referrals, nls_codepage, remap);
1676 /* BB map targetUNCs to dfs_info3 structures, here or
1677 in CIFSGetDFSRefer BB */
1678
1679 return rc;
1680 }
1681
1682 #ifdef CONFIG_DEBUG_LOCK_ALLOC
1683 static struct lock_class_key cifs_key[2];
1684 static struct lock_class_key cifs_slock_key[2];
1685
1686 static inline void
1687 cifs_reclassify_socket4(struct socket *sock)
1688 {
1689 struct sock *sk = sock->sk;
1690 BUG_ON(sock_owned_by_user(sk));
1691 sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS",
1692 &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]);
1693 }
1694
1695 static inline void
1696 cifs_reclassify_socket6(struct socket *sock)
1697 {
1698 struct sock *sk = sock->sk;
1699 BUG_ON(sock_owned_by_user(sk));
1700 sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS",
1701 &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]);
1702 }
1703 #else
1704 static inline void
1705 cifs_reclassify_socket4(struct socket *sock)
1706 {
1707 }
1708
1709 static inline void
1710 cifs_reclassify_socket6(struct socket *sock)
1711 {
1712 }
1713 #endif
1714
1715 /* See RFC1001 section 14 on representation of Netbios names */
1716 static void rfc1002mangle(char *target, char *source, unsigned int length)
1717 {
1718 unsigned int i, j;
1719
1720 for (i = 0, j = 0; i < (length); i++) {
1721 /* mask a nibble at a time and encode */
1722 target[j] = 'A' + (0x0F & (source[i] >> 4));
1723 target[j+1] = 'A' + (0x0F & source[i]);
1724 j += 2;
1725 }
1726
1727 }
1728
1729
1730 static int
1731 ipv4_connect(struct TCP_Server_Info *server)
1732 {
1733 int rc = 0;
1734 bool connected = false;
1735 __be16 orig_port = 0;
1736 struct socket *socket = server->ssocket;
1737
1738 if (socket == NULL) {
1739 rc = sock_create_kern(PF_INET, SOCK_STREAM,
1740 IPPROTO_TCP, &socket);
1741 if (rc < 0) {
1742 cERROR(1, ("Error %d creating socket", rc));
1743 return rc;
1744 }
1745
1746 /* BB other socket options to set KEEPALIVE, NODELAY? */
1747 cFYI(1, ("Socket created"));
1748 server->ssocket = socket;
1749 socket->sk->sk_allocation = GFP_NOFS;
1750 cifs_reclassify_socket4(socket);
1751 }
1752
1753 /* user overrode default port */
1754 if (server->addr.sockAddr.sin_port) {
1755 rc = socket->ops->connect(socket, (struct sockaddr *)
1756 &server->addr.sockAddr,
1757 sizeof(struct sockaddr_in), 0);
1758 if (rc >= 0)
1759 connected = true;
1760 }
1761
1762 if (!connected) {
1763 /* save original port so we can retry user specified port
1764 later if fall back ports fail this time */
1765 orig_port = server->addr.sockAddr.sin_port;
1766
1767 /* do not retry on the same port we just failed on */
1768 if (server->addr.sockAddr.sin_port != htons(CIFS_PORT)) {
1769 server->addr.sockAddr.sin_port = htons(CIFS_PORT);
1770 rc = socket->ops->connect(socket,
1771 (struct sockaddr *)
1772 &server->addr.sockAddr,
1773 sizeof(struct sockaddr_in), 0);
1774 if (rc >= 0)
1775 connected = true;
1776 }
1777 }
1778 if (!connected) {
1779 server->addr.sockAddr.sin_port = htons(RFC1001_PORT);
1780 rc = socket->ops->connect(socket, (struct sockaddr *)
1781 &server->addr.sockAddr,
1782 sizeof(struct sockaddr_in), 0);
1783 if (rc >= 0)
1784 connected = true;
1785 }
1786
1787 /* give up here - unless we want to retry on different
1788 protocol families some day */
1789 if (!connected) {
1790 if (orig_port)
1791 server->addr.sockAddr.sin_port = orig_port;
1792 cFYI(1, ("Error %d connecting to server via ipv4", rc));
1793 sock_release(socket);
1794 server->ssocket = NULL;
1795 return rc;
1796 }
1797
1798
1799 /*
1800 * Eventually check for other socket options to change from
1801 * the default. sock_setsockopt not used because it expects
1802 * user space buffer
1803 */
1804 socket->sk->sk_rcvtimeo = 7 * HZ;
1805 socket->sk->sk_sndtimeo = 5 * HZ;
1806
1807 /* make the bufsizes depend on wsize/rsize and max requests */
1808 if (server->noautotune) {
1809 if (socket->sk->sk_sndbuf < (200 * 1024))
1810 socket->sk->sk_sndbuf = 200 * 1024;
1811 if (socket->sk->sk_rcvbuf < (140 * 1024))
1812 socket->sk->sk_rcvbuf = 140 * 1024;
1813 }
1814
1815 cFYI(1, ("sndbuf %d rcvbuf %d rcvtimeo 0x%lx",
1816 socket->sk->sk_sndbuf,
1817 socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo));
1818
1819 /* send RFC1001 sessinit */
1820 if (server->addr.sockAddr.sin_port == htons(RFC1001_PORT)) {
1821 /* some servers require RFC1001 sessinit before sending
1822 negprot - BB check reconnection in case where second
1823 sessinit is sent but no second negprot */
1824 struct rfc1002_session_packet *ses_init_buf;
1825 struct smb_hdr *smb_buf;
1826 ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet),
1827 GFP_KERNEL);
1828 if (ses_init_buf) {
1829 ses_init_buf->trailer.session_req.called_len = 32;
1830 if (server->server_RFC1001_name &&
1831 server->server_RFC1001_name[0] != 0)
1832 rfc1002mangle(ses_init_buf->trailer.
1833 session_req.called_name,
1834 server->server_RFC1001_name,
1835 RFC1001_NAME_LEN_WITH_NULL);
1836 else
1837 rfc1002mangle(ses_init_buf->trailer.
1838 session_req.called_name,
1839 DEFAULT_CIFS_CALLED_NAME,
1840 RFC1001_NAME_LEN_WITH_NULL);
1841
1842 ses_init_buf->trailer.session_req.calling_len = 32;
1843
1844 /* calling name ends in null (byte 16) from old smb
1845 convention. */
1846 if (server->workstation_RFC1001_name &&
1847 server->workstation_RFC1001_name[0] != 0)
1848 rfc1002mangle(ses_init_buf->trailer.
1849 session_req.calling_name,
1850 server->workstation_RFC1001_name,
1851 RFC1001_NAME_LEN_WITH_NULL);
1852 else
1853 rfc1002mangle(ses_init_buf->trailer.
1854 session_req.calling_name,
1855 "LINUX_CIFS_CLNT",
1856 RFC1001_NAME_LEN_WITH_NULL);
1857
1858 ses_init_buf->trailer.session_req.scope1 = 0;
1859 ses_init_buf->trailer.session_req.scope2 = 0;
1860 smb_buf = (struct smb_hdr *)ses_init_buf;
1861 /* sizeof RFC1002_SESSION_REQUEST with no scope */
1862 smb_buf->smb_buf_length = 0x81000044;
1863 rc = smb_send(server, smb_buf, 0x44);
1864 kfree(ses_init_buf);
1865 msleep(1); /* RFC1001 layer in at least one server
1866 requires very short break before negprot
1867 presumably because not expecting negprot
1868 to follow so fast. This is a simple
1869 solution that works without
1870 complicating the code and causes no
1871 significant slowing down on mount
1872 for everyone else */
1873 }
1874 /* else the negprot may still work without this
1875 even though malloc failed */
1876
1877 }
1878
1879 return rc;
1880 }
1881
1882 static int
1883 ipv6_connect(struct TCP_Server_Info *server)
1884 {
1885 int rc = 0;
1886 bool connected = false;
1887 __be16 orig_port = 0;
1888 struct socket *socket = server->ssocket;
1889
1890 if (socket == NULL) {
1891 rc = sock_create_kern(PF_INET6, SOCK_STREAM,
1892 IPPROTO_TCP, &socket);
1893 if (rc < 0) {
1894 cERROR(1, ("Error %d creating ipv6 socket", rc));
1895 socket = NULL;
1896 return rc;
1897 }
1898
1899 /* BB other socket options to set KEEPALIVE, NODELAY? */
1900 cFYI(1, ("ipv6 Socket created"));
1901 server->ssocket = socket;
1902 socket->sk->sk_allocation = GFP_NOFS;
1903 cifs_reclassify_socket6(socket);
1904 }
1905
1906 /* user overrode default port */
1907 if (server->addr.sockAddr6.sin6_port) {
1908 rc = socket->ops->connect(socket,
1909 (struct sockaddr *) &server->addr.sockAddr6,
1910 sizeof(struct sockaddr_in6), 0);
1911 if (rc >= 0)
1912 connected = true;
1913 }
1914
1915 if (!connected) {
1916 /* save original port so we can retry user specified port
1917 later if fall back ports fail this time */
1918
1919 orig_port = server->addr.sockAddr6.sin6_port;
1920 /* do not retry on the same port we just failed on */
1921 if (server->addr.sockAddr6.sin6_port != htons(CIFS_PORT)) {
1922 server->addr.sockAddr6.sin6_port = htons(CIFS_PORT);
1923 rc = socket->ops->connect(socket, (struct sockaddr *)
1924 &server->addr.sockAddr6,
1925 sizeof(struct sockaddr_in6), 0);
1926 if (rc >= 0)
1927 connected = true;
1928 }
1929 }
1930 if (!connected) {
1931 server->addr.sockAddr6.sin6_port = htons(RFC1001_PORT);
1932 rc = socket->ops->connect(socket, (struct sockaddr *)
1933 &server->addr.sockAddr6,
1934 sizeof(struct sockaddr_in6), 0);
1935 if (rc >= 0)
1936 connected = true;
1937 }
1938
1939 /* give up here - unless we want to retry on different
1940 protocol families some day */
1941 if (!connected) {
1942 if (orig_port)
1943 server->addr.sockAddr6.sin6_port = orig_port;
1944 cFYI(1, ("Error %d connecting to server via ipv6", rc));
1945 sock_release(socket);
1946 server->ssocket = NULL;
1947 return rc;
1948 }
1949
1950 /*
1951 * Eventually check for other socket options to change from
1952 * the default. sock_setsockopt not used because it expects
1953 * user space buffer
1954 */
1955 socket->sk->sk_rcvtimeo = 7 * HZ;
1956 socket->sk->sk_sndtimeo = 5 * HZ;
1957 server->ssocket = socket;
1958
1959 return rc;
1960 }
1961
1962 void reset_cifs_unix_caps(int xid, struct cifsTconInfo *tcon,
1963 struct super_block *sb, struct smb_vol *vol_info)
1964 {
1965 /* if we are reconnecting then should we check to see if
1966 * any requested capabilities changed locally e.g. via
1967 * remount but we can not do much about it here
1968 * if they have (even if we could detect it by the following)
1969 * Perhaps we could add a backpointer to array of sb from tcon
1970 * or if we change to make all sb to same share the same
1971 * sb as NFS - then we only have one backpointer to sb.
1972 * What if we wanted to mount the server share twice once with
1973 * and once without posixacls or posix paths? */
1974 __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
1975
1976 if (vol_info && vol_info->no_linux_ext) {
1977 tcon->fsUnixInfo.Capability = 0;
1978 tcon->unix_ext = 0; /* Unix Extensions disabled */
1979 cFYI(1, ("Linux protocol extensions disabled"));
1980 return;
1981 } else if (vol_info)
1982 tcon->unix_ext = 1; /* Unix Extensions supported */
1983
1984 if (tcon->unix_ext == 0) {
1985 cFYI(1, ("Unix extensions disabled so not set on reconnect"));
1986 return;
1987 }
1988
1989 if (!CIFSSMBQFSUnixInfo(xid, tcon)) {
1990 __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
1991
1992 /* check for reconnect case in which we do not
1993 want to change the mount behavior if we can avoid it */
1994 if (vol_info == NULL) {
1995 /* turn off POSIX ACL and PATHNAMES if not set
1996 originally at mount time */
1997 if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0)
1998 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
1999 if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
2000 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
2001 cERROR(1, ("POSIXPATH support change"));
2002 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
2003 } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
2004 cERROR(1, ("possible reconnect error"));
2005 cERROR(1,
2006 ("server disabled POSIX path support"));
2007 }
2008 }
2009
2010 cap &= CIFS_UNIX_CAP_MASK;
2011 if (vol_info && vol_info->no_psx_acl)
2012 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
2013 else if (CIFS_UNIX_POSIX_ACL_CAP & cap) {
2014 cFYI(1, ("negotiated posix acl support"));
2015 if (sb)
2016 sb->s_flags |= MS_POSIXACL;
2017 }
2018
2019 if (vol_info && vol_info->posix_paths == 0)
2020 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
2021 else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
2022 cFYI(1, ("negotiate posix pathnames"));
2023 if (sb)
2024 CIFS_SB(sb)->mnt_cifs_flags |=
2025 CIFS_MOUNT_POSIX_PATHS;
2026 }
2027
2028 /* We might be setting the path sep back to a different
2029 form if we are reconnecting and the server switched its
2030 posix path capability for this share */
2031 if (sb && (CIFS_SB(sb)->prepathlen > 0))
2032 CIFS_SB(sb)->prepath[0] = CIFS_DIR_SEP(CIFS_SB(sb));
2033
2034 if (sb && (CIFS_SB(sb)->rsize > 127 * 1024)) {
2035 if ((cap & CIFS_UNIX_LARGE_READ_CAP) == 0) {
2036 CIFS_SB(sb)->rsize = 127 * 1024;
2037 cFYI(DBG2,
2038 ("larger reads not supported by srv"));
2039 }
2040 }
2041
2042
2043 cFYI(1, ("Negotiate caps 0x%x", (int)cap));
2044 #ifdef CONFIG_CIFS_DEBUG2
2045 if (cap & CIFS_UNIX_FCNTL_CAP)
2046 cFYI(1, ("FCNTL cap"));
2047 if (cap & CIFS_UNIX_EXTATTR_CAP)
2048 cFYI(1, ("EXTATTR cap"));
2049 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
2050 cFYI(1, ("POSIX path cap"));
2051 if (cap & CIFS_UNIX_XATTR_CAP)
2052 cFYI(1, ("XATTR cap"));
2053 if (cap & CIFS_UNIX_POSIX_ACL_CAP)
2054 cFYI(1, ("POSIX ACL cap"));
2055 if (cap & CIFS_UNIX_LARGE_READ_CAP)
2056 cFYI(1, ("very large read cap"));
2057 if (cap & CIFS_UNIX_LARGE_WRITE_CAP)
2058 cFYI(1, ("very large write cap"));
2059 #endif /* CIFS_DEBUG2 */
2060 if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
2061 if (vol_info == NULL) {
2062 cFYI(1, ("resetting capabilities failed"));
2063 } else
2064 cERROR(1, ("Negotiating Unix capabilities "
2065 "with the server failed. Consider "
2066 "mounting with the Unix Extensions\n"
2067 "disabled, if problems are found, "
2068 "by specifying the nounix mount "
2069 "option."));
2070
2071 }
2072 }
2073 }
2074
2075 static void
2076 convert_delimiter(char *path, char delim)
2077 {
2078 int i;
2079 char old_delim;
2080
2081 if (path == NULL)
2082 return;
2083
2084 if (delim == '/')
2085 old_delim = '\\';
2086 else
2087 old_delim = '/';
2088
2089 for (i = 0; path[i] != '\0'; i++) {
2090 if (path[i] == old_delim)
2091 path[i] = delim;
2092 }
2093 }
2094
2095 static void setup_cifs_sb(struct smb_vol *pvolume_info,
2096 struct cifs_sb_info *cifs_sb)
2097 {
2098 if (pvolume_info->rsize > CIFSMaxBufSize) {
2099 cERROR(1, ("rsize %d too large, using MaxBufSize",
2100 pvolume_info->rsize));
2101 cifs_sb->rsize = CIFSMaxBufSize;
2102 } else if ((pvolume_info->rsize) &&
2103 (pvolume_info->rsize <= CIFSMaxBufSize))
2104 cifs_sb->rsize = pvolume_info->rsize;
2105 else /* default */
2106 cifs_sb->rsize = CIFSMaxBufSize;
2107
2108 if (pvolume_info->wsize > PAGEVEC_SIZE * PAGE_CACHE_SIZE) {
2109 cERROR(1, ("wsize %d too large, using 4096 instead",
2110 pvolume_info->wsize));
2111 cifs_sb->wsize = 4096;
2112 } else if (pvolume_info->wsize)
2113 cifs_sb->wsize = pvolume_info->wsize;
2114 else
2115 cifs_sb->wsize = min_t(const int,
2116 PAGEVEC_SIZE * PAGE_CACHE_SIZE,
2117 127*1024);
2118 /* old default of CIFSMaxBufSize was too small now
2119 that SMB Write2 can send multiple pages in kvec.
2120 RFC1001 does not describe what happens when frame
2121 bigger than 128K is sent so use that as max in
2122 conjunction with 52K kvec constraint on arch with 4K
2123 page size */
2124
2125 if (cifs_sb->rsize < 2048) {
2126 cifs_sb->rsize = 2048;
2127 /* Windows ME may prefer this */
2128 cFYI(1, ("readsize set to minimum: 2048"));
2129 }
2130 /* calculate prepath */
2131 cifs_sb->prepath = pvolume_info->prepath;
2132 if (cifs_sb->prepath) {
2133 cifs_sb->prepathlen = strlen(cifs_sb->prepath);
2134 /* we can not convert the / to \ in the path
2135 separators in the prefixpath yet because we do not
2136 know (until reset_cifs_unix_caps is called later)
2137 whether POSIX PATH CAP is available. We normalize
2138 the / to \ after reset_cifs_unix_caps is called */
2139 pvolume_info->prepath = NULL;
2140 } else
2141 cifs_sb->prepathlen = 0;
2142 cifs_sb->mnt_uid = pvolume_info->linux_uid;
2143 cifs_sb->mnt_gid = pvolume_info->linux_gid;
2144 cifs_sb->mnt_file_mode = pvolume_info->file_mode;
2145 cifs_sb->mnt_dir_mode = pvolume_info->dir_mode;
2146 cFYI(1, ("file mode: 0x%x dir mode: 0x%x",
2147 cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode));
2148
2149 if (pvolume_info->noperm)
2150 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
2151 if (pvolume_info->setuids)
2152 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
2153 if (pvolume_info->server_ino)
2154 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
2155 if (pvolume_info->remap)
2156 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
2157 if (pvolume_info->no_xattr)
2158 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
2159 if (pvolume_info->sfu_emul)
2160 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
2161 if (pvolume_info->nobrl)
2162 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
2163 if (pvolume_info->mand_lock)
2164 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL;
2165 if (pvolume_info->cifs_acl)
2166 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
2167 if (pvolume_info->override_uid)
2168 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID;
2169 if (pvolume_info->override_gid)
2170 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
2171 if (pvolume_info->dynperm)
2172 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM;
2173 if (pvolume_info->direct_io) {
2174 cFYI(1, ("mounting share using direct i/o"));
2175 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
2176 }
2177
2178 if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm))
2179 cERROR(1, ("mount option dynperm ignored if cifsacl "
2180 "mount option supported"));
2181 }
2182
2183 static int
2184 is_path_accessible(int xid, struct cifsTconInfo *tcon,
2185 struct cifs_sb_info *cifs_sb, const char *full_path)
2186 {
2187 int rc;
2188 __u64 inode_num;
2189 FILE_ALL_INFO *pfile_info;
2190
2191 rc = CIFSGetSrvInodeNumber(xid, tcon, full_path, &inode_num,
2192 cifs_sb->local_nls,
2193 cifs_sb->mnt_cifs_flags &
2194 CIFS_MOUNT_MAP_SPECIAL_CHR);
2195 if (rc != -EOPNOTSUPP)
2196 return rc;
2197
2198 pfile_info = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
2199 if (pfile_info == NULL)
2200 return -ENOMEM;
2201
2202 rc = CIFSSMBQPathInfo(xid, tcon, full_path, pfile_info,
2203 0 /* not legacy */, cifs_sb->local_nls,
2204 cifs_sb->mnt_cifs_flags &
2205 CIFS_MOUNT_MAP_SPECIAL_CHR);
2206 kfree(pfile_info);
2207 return rc;
2208 }
2209
2210 int
2211 cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
2212 char *mount_data, const char *devname)
2213 {
2214 int rc = 0;
2215 int xid;
2216 struct smb_vol *volume_info;
2217 struct cifsSesInfo *pSesInfo = NULL;
2218 struct cifsTconInfo *tcon = NULL;
2219 struct TCP_Server_Info *srvTcp = NULL;
2220 char *full_path;
2221
2222 xid = GetXid();
2223
2224 volume_info = kzalloc(sizeof(struct smb_vol), GFP_KERNEL);
2225 if (!volume_info) {
2226 rc = -ENOMEM;
2227 goto out;
2228 }
2229
2230 if (cifs_parse_mount_options(mount_data, devname, volume_info)) {
2231 rc = -EINVAL;
2232 goto out;
2233 }
2234
2235 if (volume_info->nullauth) {
2236 cFYI(1, ("null user"));
2237 volume_info->username = "";
2238 } else if (volume_info->username) {
2239 /* BB fixme parse for domain name here */
2240 cFYI(1, ("Username: %s", volume_info->username));
2241 } else {
2242 cifserror("No username specified");
2243 /* In userspace mount helper we can get user name from alternate
2244 locations such as env variables and files on disk */
2245 rc = -EINVAL;
2246 goto out;
2247 }
2248
2249
2250 /* this is needed for ASCII cp to Unicode converts */
2251 if (volume_info->iocharset == NULL) {
2252 cifs_sb->local_nls = load_nls_default();
2253 /* load_nls_default can not return null */
2254 } else {
2255 cifs_sb->local_nls = load_nls(volume_info->iocharset);
2256 if (cifs_sb->local_nls == NULL) {
2257 cERROR(1, ("CIFS mount error: iocharset %s not found",
2258 volume_info->iocharset));
2259 rc = -ELIBACC;
2260 goto out;
2261 }
2262 }
2263
2264 /* get a reference to a tcp session */
2265 srvTcp = cifs_get_tcp_session(volume_info);
2266 if (IS_ERR(srvTcp)) {
2267 rc = PTR_ERR(srvTcp);
2268 goto out;
2269 }
2270
2271 pSesInfo = cifs_find_smb_ses(srvTcp, volume_info->username);
2272 if (pSesInfo) {
2273 cFYI(1, ("Existing smb sess found (status=%d)",
2274 pSesInfo->status));
2275 /*
2276 * The existing SMB session already has a reference to srvTcp,
2277 * so we can put back the extra one we got before
2278 */
2279 cifs_put_tcp_session(srvTcp);
2280
2281 down(&pSesInfo->sesSem);
2282 if (pSesInfo->need_reconnect) {
2283 cFYI(1, ("Session needs reconnect"));
2284 rc = cifs_setup_session(xid, pSesInfo,
2285 cifs_sb->local_nls);
2286 }
2287 up(&pSesInfo->sesSem);
2288 } else if (!rc) {
2289 cFYI(1, ("Existing smb sess not found"));
2290 pSesInfo = sesInfoAlloc();
2291 if (pSesInfo == NULL) {
2292 rc = -ENOMEM;
2293 goto mount_fail_check;
2294 }
2295
2296 /* new SMB session uses our srvTcp ref */
2297 pSesInfo->server = srvTcp;
2298 if (srvTcp->addr.sockAddr6.sin6_family == AF_INET6)
2299 sprintf(pSesInfo->serverName, "%pI6",
2300 &srvTcp->addr.sockAddr6.sin6_addr);
2301 else
2302 sprintf(pSesInfo->serverName, "%pI4",
2303 &srvTcp->addr.sockAddr.sin_addr.s_addr);
2304
2305 write_lock(&cifs_tcp_ses_lock);
2306 list_add(&pSesInfo->smb_ses_list, &srvTcp->smb_ses_list);
2307 write_unlock(&cifs_tcp_ses_lock);
2308
2309 /* volume_info->password freed at unmount */
2310 if (volume_info->password) {
2311 pSesInfo->password = kstrdup(volume_info->password,
2312 GFP_KERNEL);
2313 if (!pSesInfo->password) {
2314 rc = -ENOMEM;
2315 goto mount_fail_check;
2316 }
2317 }
2318 if (volume_info->username)
2319 strncpy(pSesInfo->userName, volume_info->username,
2320 MAX_USERNAME_SIZE);
2321 if (volume_info->domainname) {
2322 int len = strlen(volume_info->domainname);
2323 pSesInfo->domainName = kmalloc(len + 1, GFP_KERNEL);
2324 if (pSesInfo->domainName)
2325 strcpy(pSesInfo->domainName,
2326 volume_info->domainname);
2327 }
2328 pSesInfo->linux_uid = volume_info->linux_uid;
2329 pSesInfo->overrideSecFlg = volume_info->secFlg;
2330 down(&pSesInfo->sesSem);
2331
2332 /* BB FIXME need to pass vol->secFlgs BB */
2333 rc = cifs_setup_session(xid, pSesInfo,
2334 cifs_sb->local_nls);
2335 up(&pSesInfo->sesSem);
2336 }
2337
2338 /* search for existing tcon to this server share */
2339 if (!rc) {
2340 setup_cifs_sb(volume_info, cifs_sb);
2341
2342 tcon = cifs_find_tcon(pSesInfo, volume_info->UNC);
2343 if (tcon) {
2344 cFYI(1, ("Found match on UNC path"));
2345 /* existing tcon already has a reference */
2346 cifs_put_smb_ses(pSesInfo);
2347 if (tcon->seal != volume_info->seal)
2348 cERROR(1, ("transport encryption setting "
2349 "conflicts with existing tid"));
2350 } else {
2351 tcon = tconInfoAlloc();
2352 if (tcon == NULL) {
2353 rc = -ENOMEM;
2354 goto mount_fail_check;
2355 }
2356
2357 tcon->ses = pSesInfo;
2358 if (volume_info->password) {
2359 tcon->password = kstrdup(volume_info->password,
2360 GFP_KERNEL);
2361 if (!tcon->password) {
2362 rc = -ENOMEM;
2363 goto mount_fail_check;
2364 }
2365 }
2366
2367 /* check for null share name ie connect to dfs root */
2368 if ((strchr(volume_info->UNC + 3, '\\') == NULL)
2369 && (strchr(volume_info->UNC + 3, '/') == NULL)) {
2370 /* rc = connect_to_dfs_path(...) */
2371 cFYI(1, ("DFS root not supported"));
2372 rc = -ENODEV;
2373 goto mount_fail_check;
2374 } else {
2375 /* BB Do we need to wrap sesSem around
2376 * this TCon call and Unix SetFS as
2377 * we do on SessSetup and reconnect? */
2378 rc = CIFSTCon(xid, pSesInfo, volume_info->UNC,
2379 tcon, cifs_sb->local_nls);
2380 cFYI(1, ("CIFS Tcon rc = %d", rc));
2381 if (volume_info->nodfs) {
2382 tcon->Flags &= ~SMB_SHARE_IS_IN_DFS;
2383 cFYI(1, ("DFS disabled (%d)",
2384 tcon->Flags));
2385 }
2386 }
2387 if (rc)
2388 goto mount_fail_check;
2389 tcon->seal = volume_info->seal;
2390 write_lock(&cifs_tcp_ses_lock);
2391 list_add(&tcon->tcon_list, &pSesInfo->tcon_list);
2392 write_unlock(&cifs_tcp_ses_lock);
2393 }
2394
2395 /* we can have only one retry value for a connection
2396 to a share so for resources mounted more than once
2397 to the same server share the last value passed in
2398 for the retry flag is used */
2399 tcon->retry = volume_info->retry;
2400 tcon->nocase = volume_info->nocase;
2401 tcon->local_lease = volume_info->local_lease;
2402 }
2403 if (pSesInfo) {
2404 if (pSesInfo->capabilities & CAP_LARGE_FILES) {
2405 sb->s_maxbytes = (u64) 1 << 63;
2406 } else
2407 sb->s_maxbytes = (u64) 1 << 31; /* 2 GB */
2408 }
2409
2410 /* BB FIXME fix time_gran to be larger for LANMAN sessions */
2411 sb->s_time_gran = 100;
2412
2413 mount_fail_check:
2414 /* on error free sesinfo and tcon struct if needed */
2415 if (rc) {
2416 /* If find_unc succeeded then rc == 0 so we can not end */
2417 /* up accidently freeing someone elses tcon struct */
2418 if (tcon)
2419 cifs_put_tcon(tcon);
2420 else if (pSesInfo)
2421 cifs_put_smb_ses(pSesInfo);
2422 else
2423 cifs_put_tcp_session(srvTcp);
2424 goto out;
2425 }
2426 cifs_sb->tcon = tcon;
2427
2428 /* do not care if following two calls succeed - informational */
2429 if (!tcon->ipc) {
2430 CIFSSMBQFSDeviceInfo(xid, tcon);
2431 CIFSSMBQFSAttributeInfo(xid, tcon);
2432 }
2433
2434 /* tell server which Unix caps we support */
2435 if (tcon->ses->capabilities & CAP_UNIX)
2436 /* reset of caps checks mount to see if unix extensions
2437 disabled for just this mount */
2438 reset_cifs_unix_caps(xid, tcon, sb, volume_info);
2439 else
2440 tcon->unix_ext = 0; /* server does not support them */
2441
2442 /* convert forward to back slashes in prepath here if needed */
2443 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) == 0)
2444 convert_delimiter(cifs_sb->prepath, CIFS_DIR_SEP(cifs_sb));
2445
2446 if ((tcon->unix_ext == 0) && (cifs_sb->rsize > (1024 * 127))) {
2447 cifs_sb->rsize = 1024 * 127;
2448 cFYI(DBG2, ("no very large read support, rsize now 127K"));
2449 }
2450 if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X))
2451 cifs_sb->wsize = min(cifs_sb->wsize,
2452 (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE));
2453 if (!(tcon->ses->capabilities & CAP_LARGE_READ_X))
2454 cifs_sb->rsize = min(cifs_sb->rsize,
2455 (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE));
2456
2457 if (!rc && cifs_sb->prepathlen) {
2458 /* build_path_to_root works only when we have a valid tcon */
2459 full_path = cifs_build_path_to_root(cifs_sb);
2460 if (full_path == NULL) {
2461 rc = -ENOMEM;
2462 goto mount_fail_check;
2463 }
2464 rc = is_path_accessible(xid, tcon, cifs_sb, full_path);
2465 if (rc) {
2466 cERROR(1, ("Path %s in not accessible: %d",
2467 full_path, rc));
2468 kfree(full_path);
2469 goto mount_fail_check;
2470 }
2471 kfree(full_path);
2472 }
2473
2474 /* volume_info->password is freed above when existing session found
2475 (in which case it is not needed anymore) but when new sesion is created
2476 the password ptr is put in the new session structure (in which case the
2477 password will be freed at unmount time) */
2478 out:
2479 /* zero out password before freeing */
2480 if (volume_info) {
2481 if (volume_info->password != NULL) {
2482 memset(volume_info->password, 0,
2483 strlen(volume_info->password));
2484 kfree(volume_info->password);
2485 }
2486 kfree(volume_info->UNC);
2487 kfree(volume_info->prepath);
2488 kfree(volume_info);
2489 }
2490 FreeXid(xid);
2491 return rc;
2492 }
2493
2494 static int
2495 CIFSSessSetup(unsigned int xid, struct cifsSesInfo *ses,
2496 char session_key[CIFS_SESS_KEY_SIZE],
2497 const struct nls_table *nls_codepage)
2498 {
2499 struct smb_hdr *smb_buffer;
2500 struct smb_hdr *smb_buffer_response;
2501 SESSION_SETUP_ANDX *pSMB;
2502 SESSION_SETUP_ANDX *pSMBr;
2503 char *bcc_ptr;
2504 char *user;
2505 char *domain;
2506 int rc = 0;
2507 int remaining_words = 0;
2508 int bytes_returned = 0;
2509 int len;
2510 __u32 capabilities;
2511 __u16 count;
2512
2513 cFYI(1, ("In sesssetup"));
2514 if (ses == NULL)
2515 return -EINVAL;
2516 user = ses->userName;
2517 domain = ses->domainName;
2518 smb_buffer = cifs_buf_get();
2519
2520 if (smb_buffer == NULL)
2521 return -ENOMEM;
2522
2523 smb_buffer_response = smb_buffer;
2524 pSMBr = pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2525
2526 /* send SMBsessionSetup here */
2527 header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2528 NULL /* no tCon exists yet */ , 13 /* wct */ );
2529
2530 smb_buffer->Mid = GetNextMid(ses->server);
2531 pSMB->req_no_secext.AndXCommand = 0xFF;
2532 pSMB->req_no_secext.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2533 pSMB->req_no_secext.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2534
2535 if (ses->server->secMode &
2536 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2537 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2538
2539 capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2540 CAP_LARGE_WRITE_X | CAP_LARGE_READ_X;
2541 if (ses->capabilities & CAP_UNICODE) {
2542 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2543 capabilities |= CAP_UNICODE;
2544 }
2545 if (ses->capabilities & CAP_STATUS32) {
2546 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2547 capabilities |= CAP_STATUS32;
2548 }
2549 if (ses->capabilities & CAP_DFS) {
2550 smb_buffer->Flags2 |= SMBFLG2_DFS;
2551 capabilities |= CAP_DFS;
2552 }
2553 pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
2554
2555 pSMB->req_no_secext.CaseInsensitivePasswordLength =
2556 cpu_to_le16(CIFS_SESS_KEY_SIZE);
2557
2558 pSMB->req_no_secext.CaseSensitivePasswordLength =
2559 cpu_to_le16(CIFS_SESS_KEY_SIZE);
2560 bcc_ptr = pByteArea(smb_buffer);
2561 memcpy(bcc_ptr, (char *) session_key, CIFS_SESS_KEY_SIZE);
2562 bcc_ptr += CIFS_SESS_KEY_SIZE;
2563 memcpy(bcc_ptr, (char *) session_key, CIFS_SESS_KEY_SIZE);
2564 bcc_ptr += CIFS_SESS_KEY_SIZE;
2565
2566 if (ses->capabilities & CAP_UNICODE) {
2567 if ((long) bcc_ptr % 2) { /* must be word aligned for Unicode */
2568 *bcc_ptr = 0;
2569 bcc_ptr++;
2570 }
2571 if (user == NULL)
2572 bytes_returned = 0; /* skip null user */
2573 else
2574 bytes_returned =
2575 cifs_strtoUCS((__le16 *) bcc_ptr, user, 100,
2576 nls_codepage);
2577 /* convert number of 16 bit words to bytes */
2578 bcc_ptr += 2 * bytes_returned;
2579 bcc_ptr += 2; /* trailing null */
2580 if (domain == NULL)
2581 bytes_returned =
2582 cifs_strtoUCS((__le16 *) bcc_ptr,
2583 "CIFS_LINUX_DOM", 32, nls_codepage);
2584 else
2585 bytes_returned =
2586 cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
2587 nls_codepage);
2588 bcc_ptr += 2 * bytes_returned;
2589 bcc_ptr += 2;
2590 bytes_returned =
2591 cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2592 32, nls_codepage);
2593 bcc_ptr += 2 * bytes_returned;
2594 bytes_returned =
2595 cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release,
2596 32, nls_codepage);
2597 bcc_ptr += 2 * bytes_returned;
2598 bcc_ptr += 2;
2599 bytes_returned =
2600 cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2601 64, nls_codepage);
2602 bcc_ptr += 2 * bytes_returned;
2603 bcc_ptr += 2;
2604 } else {
2605 if (user != NULL) {
2606 strncpy(bcc_ptr, user, 200);
2607 bcc_ptr += strnlen(user, 200);
2608 }
2609 *bcc_ptr = 0;
2610 bcc_ptr++;
2611 if (domain == NULL) {
2612 strcpy(bcc_ptr, "CIFS_LINUX_DOM");
2613 bcc_ptr += strlen("CIFS_LINUX_DOM") + 1;
2614 } else {
2615 strncpy(bcc_ptr, domain, 64);
2616 bcc_ptr += strnlen(domain, 64);
2617 *bcc_ptr = 0;
2618 bcc_ptr++;
2619 }
2620 strcpy(bcc_ptr, "Linux version ");
2621 bcc_ptr += strlen("Linux version ");
2622 strcpy(bcc_ptr, utsname()->release);
2623 bcc_ptr += strlen(utsname()->release) + 1;
2624 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2625 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2626 }
2627 count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2628 smb_buffer->smb_buf_length += count;
2629 pSMB->req_no_secext.ByteCount = cpu_to_le16(count);
2630
2631 rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
2632 &bytes_returned, CIFS_LONG_OP);
2633 if (rc) {
2634 /* rc = map_smb_to_linux_error(smb_buffer_response); now done in SendReceive */
2635 } else if ((smb_buffer_response->WordCount == 3)
2636 || (smb_buffer_response->WordCount == 4)) {
2637 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2638 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2639 if (action & GUEST_LOGIN)
2640 cFYI(1, ("Guest login")); /* BB mark SesInfo struct? */
2641 ses->Suid = smb_buffer_response->Uid; /* UID left in wire format
2642 (little endian) */
2643 cFYI(1, ("UID = %d ", ses->Suid));
2644 /* response can have either 3 or 4 word count - Samba sends 3 */
2645 bcc_ptr = pByteArea(smb_buffer_response);
2646 if ((pSMBr->resp.hdr.WordCount == 3)
2647 || ((pSMBr->resp.hdr.WordCount == 4)
2648 && (blob_len < pSMBr->resp.ByteCount))) {
2649 if (pSMBr->resp.hdr.WordCount == 4)
2650 bcc_ptr += blob_len;
2651
2652 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2653 if ((long) (bcc_ptr) % 2) {
2654 remaining_words =
2655 (BCC(smb_buffer_response) - 1) / 2;
2656 /* Unicode strings must be word
2657 aligned */
2658 bcc_ptr++;
2659 } else {
2660 remaining_words =
2661 BCC(smb_buffer_response) / 2;
2662 }
2663 len =
2664 UniStrnlen((wchar_t *) bcc_ptr,
2665 remaining_words - 1);
2666 /* We look for obvious messed up bcc or strings in response so we do not go off
2667 the end since (at least) WIN2K and Windows XP have a major bug in not null
2668 terminating last Unicode string in response */
2669 if (ses->serverOS)
2670 kfree(ses->serverOS);
2671 ses->serverOS = kzalloc(2 * (len + 1),
2672 GFP_KERNEL);
2673 if (ses->serverOS == NULL)
2674 goto sesssetup_nomem;
2675 cifs_strfromUCS_le(ses->serverOS,
2676 (__le16 *)bcc_ptr,
2677 len, nls_codepage);
2678 bcc_ptr += 2 * (len + 1);
2679 remaining_words -= len + 1;
2680 ses->serverOS[2 * len] = 0;
2681 ses->serverOS[1 + (2 * len)] = 0;
2682 if (remaining_words > 0) {
2683 len = UniStrnlen((wchar_t *)bcc_ptr,
2684 remaining_words-1);
2685 kfree(ses->serverNOS);
2686 ses->serverNOS = kzalloc(2 * (len + 1),
2687 GFP_KERNEL);
2688 if (ses->serverNOS == NULL)
2689 goto sesssetup_nomem;
2690 cifs_strfromUCS_le(ses->serverNOS,
2691 (__le16 *)bcc_ptr,
2692 len, nls_codepage);
2693 bcc_ptr += 2 * (len + 1);
2694 ses->serverNOS[2 * len] = 0;
2695 ses->serverNOS[1 + (2 * len)] = 0;
2696 if (strncmp(ses->serverNOS,
2697 "NT LAN Manager 4", 16) == 0) {
2698 cFYI(1, ("NT4 server"));
2699 ses->flags |= CIFS_SES_NT4;
2700 }
2701 remaining_words -= len + 1;
2702 if (remaining_words > 0) {
2703 len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
2704 /* last string is not always null terminated
2705 (for e.g. for Windows XP & 2000) */
2706 if (ses->serverDomain)
2707 kfree(ses->serverDomain);
2708 ses->serverDomain =
2709 kzalloc(2*(len+1),
2710 GFP_KERNEL);
2711 if (ses->serverDomain == NULL)
2712 goto sesssetup_nomem;
2713 cifs_strfromUCS_le(ses->serverDomain,
2714 (__le16 *)bcc_ptr,
2715 len, nls_codepage);
2716 bcc_ptr += 2 * (len + 1);
2717 ses->serverDomain[2*len] = 0;
2718 ses->serverDomain[1+(2*len)] = 0;
2719 } else { /* else no more room so create
2720 dummy domain string */
2721 if (ses->serverDomain)
2722 kfree(ses->serverDomain);
2723 ses->serverDomain =
2724 kzalloc(2, GFP_KERNEL);
2725 }
2726 } else { /* no room so create dummy domain
2727 and NOS string */
2728
2729 /* if these kcallocs fail not much we
2730 can do, but better to not fail the
2731 sesssetup itself */
2732 kfree(ses->serverDomain);
2733 ses->serverDomain =
2734 kzalloc(2, GFP_KERNEL);
2735 kfree(ses->serverNOS);
2736 ses->serverNOS =
2737 kzalloc(2, GFP_KERNEL);
2738 }
2739 } else { /* ASCII */
2740 len = strnlen(bcc_ptr, 1024);
2741 if (((long) bcc_ptr + len) - (long)
2742 pByteArea(smb_buffer_response)
2743 <= BCC(smb_buffer_response)) {
2744 kfree(ses->serverOS);
2745 ses->serverOS = kzalloc(len + 1,
2746 GFP_KERNEL);
2747 if (ses->serverOS == NULL)
2748 goto sesssetup_nomem;
2749 strncpy(ses->serverOS, bcc_ptr, len);
2750
2751 bcc_ptr += len;
2752 /* null terminate the string */
2753 bcc_ptr[0] = 0;
2754 bcc_ptr++;
2755
2756 len = strnlen(bcc_ptr, 1024);
2757 kfree(ses->serverNOS);
2758 ses->serverNOS = kzalloc(len + 1,
2759 GFP_KERNEL);
2760 if (ses->serverNOS == NULL)
2761 goto sesssetup_nomem;
2762 strncpy(ses->serverNOS, bcc_ptr, len);
2763 bcc_ptr += len;
2764 bcc_ptr[0] = 0;
2765 bcc_ptr++;
2766
2767 len = strnlen(bcc_ptr, 1024);
2768 if (ses->serverDomain)
2769 kfree(ses->serverDomain);
2770 ses->serverDomain = kzalloc(len + 1,
2771 GFP_KERNEL);
2772 if (ses->serverDomain == NULL)
2773 goto sesssetup_nomem;
2774 strncpy(ses->serverDomain, bcc_ptr,
2775 len);
2776 bcc_ptr += len;
2777 bcc_ptr[0] = 0;
2778 bcc_ptr++;
2779 } else
2780 cFYI(1,
2781 ("Variable field of length %d "
2782 "extends beyond end of smb ",
2783 len));
2784 }
2785 } else {
2786 cERROR(1, ("Security Blob Length extends beyond "
2787 "end of SMB"));
2788 }
2789 } else {
2790 cERROR(1, ("Invalid Word count %d: ",
2791 smb_buffer_response->WordCount));
2792 rc = -EIO;
2793 }
2794 sesssetup_nomem: /* do not return an error on nomem for the info strings,
2795 since that could make reconnection harder, and
2796 reconnection might be needed to free memory */
2797 cifs_buf_release(smb_buffer);
2798
2799 return rc;
2800 }
2801
2802 static int
2803 CIFSNTLMSSPNegotiateSessSetup(unsigned int xid,
2804 struct cifsSesInfo *ses, bool *pNTLMv2_flag,
2805 const struct nls_table *nls_codepage)
2806 {
2807 struct smb_hdr *smb_buffer;
2808 struct smb_hdr *smb_buffer_response;
2809 SESSION_SETUP_ANDX *pSMB;
2810 SESSION_SETUP_ANDX *pSMBr;
2811 char *bcc_ptr;
2812 char *domain;
2813 int rc = 0;
2814 int remaining_words = 0;
2815 int bytes_returned = 0;
2816 int len;
2817 int SecurityBlobLength = sizeof(NEGOTIATE_MESSAGE);
2818 PNEGOTIATE_MESSAGE SecurityBlob;
2819 PCHALLENGE_MESSAGE SecurityBlob2;
2820 __u32 negotiate_flags, capabilities;
2821 __u16 count;
2822
2823 cFYI(1, ("In NTLMSSP sesssetup (negotiate)"));
2824 if (ses == NULL)
2825 return -EINVAL;
2826 domain = ses->domainName;
2827 *pNTLMv2_flag = false;
2828 smb_buffer = cifs_buf_get();
2829 if (smb_buffer == NULL) {
2830 return -ENOMEM;
2831 }
2832 smb_buffer_response = smb_buffer;
2833 pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2834 pSMBr = (SESSION_SETUP_ANDX *) smb_buffer_response;
2835
2836 /* send SMBsessionSetup here */
2837 header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2838 NULL /* no tCon exists yet */ , 12 /* wct */ );
2839
2840 smb_buffer->Mid = GetNextMid(ses->server);
2841 pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
2842 pSMB->req.hdr.Flags |= (SMBFLG_CASELESS | SMBFLG_CANONICAL_PATH_FORMAT);
2843
2844 pSMB->req.AndXCommand = 0xFF;
2845 pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2846 pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2847
2848 if (ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2849 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2850
2851 capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2852 CAP_EXTENDED_SECURITY;
2853 if (ses->capabilities & CAP_UNICODE) {
2854 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2855 capabilities |= CAP_UNICODE;
2856 }
2857 if (ses->capabilities & CAP_STATUS32) {
2858 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2859 capabilities |= CAP_STATUS32;
2860 }
2861 if (ses->capabilities & CAP_DFS) {
2862 smb_buffer->Flags2 |= SMBFLG2_DFS;
2863 capabilities |= CAP_DFS;
2864 }
2865 pSMB->req.Capabilities = cpu_to_le32(capabilities);
2866
2867 bcc_ptr = (char *) &pSMB->req.SecurityBlob;
2868 SecurityBlob = (PNEGOTIATE_MESSAGE) bcc_ptr;
2869 strncpy(SecurityBlob->Signature, NTLMSSP_SIGNATURE, 8);
2870 SecurityBlob->MessageType = NtLmNegotiate;
2871 negotiate_flags =
2872 NTLMSSP_NEGOTIATE_UNICODE | NTLMSSP_NEGOTIATE_OEM |
2873 NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_NTLM |
2874 NTLMSSP_NEGOTIATE_56 |
2875 /* NTLMSSP_NEGOTIATE_ALWAYS_SIGN | */ NTLMSSP_NEGOTIATE_128;
2876 if (sign_CIFS_PDUs)
2877 negotiate_flags |= NTLMSSP_NEGOTIATE_SIGN;
2878 /* if (ntlmv2_support)
2879 negotiate_flags |= NTLMSSP_NEGOTIATE_NTLMV2;*/
2880 /* setup pointers to domain name and workstation name */
2881 bcc_ptr += SecurityBlobLength;
2882
2883 SecurityBlob->WorkstationName.Buffer = 0;
2884 SecurityBlob->WorkstationName.Length = 0;
2885 SecurityBlob->WorkstationName.MaximumLength = 0;
2886
2887 /* Domain not sent on first Sesssetup in NTLMSSP, instead it is sent
2888 along with username on auth request (ie the response to challenge) */
2889 SecurityBlob->DomainName.Buffer = 0;
2890 SecurityBlob->DomainName.Length = 0;
2891 SecurityBlob->DomainName.MaximumLength = 0;
2892 if (ses->capabilities & CAP_UNICODE) {
2893 if ((long) bcc_ptr % 2) {
2894 *bcc_ptr = 0;
2895 bcc_ptr++;
2896 }
2897
2898 bytes_returned =
2899 cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2900 32, nls_codepage);
2901 bcc_ptr += 2 * bytes_returned;
2902 bytes_returned =
2903 cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release, 32,
2904 nls_codepage);
2905 bcc_ptr += 2 * bytes_returned;
2906 bcc_ptr += 2; /* null terminate Linux version */
2907 bytes_returned =
2908 cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2909 64, nls_codepage);
2910 bcc_ptr += 2 * bytes_returned;
2911 *(bcc_ptr + 1) = 0;
2912 *(bcc_ptr + 2) = 0;
2913 bcc_ptr += 2; /* null terminate network opsys string */
2914 *(bcc_ptr + 1) = 0;
2915 *(bcc_ptr + 2) = 0;
2916 bcc_ptr += 2; /* null domain */
2917 } else { /* ASCII */
2918 strcpy(bcc_ptr, "Linux version ");
2919 bcc_ptr += strlen("Linux version ");
2920 strcpy(bcc_ptr, utsname()->release);
2921 bcc_ptr += strlen(utsname()->release) + 1;
2922 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2923 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2924 bcc_ptr++; /* empty domain field */
2925 *bcc_ptr = 0;
2926 }
2927 SecurityBlob->NegotiateFlags = cpu_to_le32(negotiate_flags);
2928 pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
2929 count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2930 smb_buffer->smb_buf_length += count;
2931 pSMB->req.ByteCount = cpu_to_le16(count);
2932
2933 rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
2934 &bytes_returned, CIFS_LONG_OP);
2935
2936 if (smb_buffer_response->Status.CifsError ==
2937 cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED))
2938 rc = 0;
2939
2940 if (rc) {
2941 /* rc = map_smb_to_linux_error(smb_buffer_response); *//* done in SendReceive now */
2942 } else if ((smb_buffer_response->WordCount == 3)
2943 || (smb_buffer_response->WordCount == 4)) {
2944 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2945 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2946
2947 if (action & GUEST_LOGIN)
2948 cFYI(1, ("Guest login"));
2949 /* Do we want to set anything in SesInfo struct when guest login? */
2950
2951 bcc_ptr = pByteArea(smb_buffer_response);
2952 /* response can have either 3 or 4 word count - Samba sends 3 */
2953
2954 SecurityBlob2 = (PCHALLENGE_MESSAGE) bcc_ptr;
2955 if (SecurityBlob2->MessageType != NtLmChallenge) {
2956 cFYI(1, ("Unexpected NTLMSSP message type received %d",
2957 SecurityBlob2->MessageType));
2958 } else if (ses) {
2959 ses->Suid = smb_buffer_response->Uid; /* UID left in le format */
2960 cFYI(1, ("UID = %d", ses->Suid));
2961 if ((pSMBr->resp.hdr.WordCount == 3)
2962 || ((pSMBr->resp.hdr.WordCount == 4)
2963 && (blob_len <
2964 pSMBr->resp.ByteCount))) {
2965
2966 if (pSMBr->resp.hdr.WordCount == 4) {
2967 bcc_ptr += blob_len;
2968 cFYI(1, ("Security Blob Length %d",
2969 blob_len));
2970 }
2971
2972 cFYI(1, ("NTLMSSP Challenge rcvd"));
2973
2974 memcpy(ses->server->cryptKey,
2975 SecurityBlob2->Challenge,
2976 CIFS_CRYPTO_KEY_SIZE);
2977 if (SecurityBlob2->NegotiateFlags &
2978 cpu_to_le32(NTLMSSP_NEGOTIATE_NTLMV2))
2979 *pNTLMv2_flag = true;
2980
2981 if ((SecurityBlob2->NegotiateFlags &
2982 cpu_to_le32(NTLMSSP_NEGOTIATE_ALWAYS_SIGN))
2983 || (sign_CIFS_PDUs > 1))
2984 ses->server->secMode |=
2985 SECMODE_SIGN_REQUIRED;
2986 if ((SecurityBlob2->NegotiateFlags &
2987 cpu_to_le32(NTLMSSP_NEGOTIATE_SIGN)) && (sign_CIFS_PDUs))
2988 ses->server->secMode |=
2989 SECMODE_SIGN_ENABLED;
2990
2991 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2992 if ((long) (bcc_ptr) % 2) {
2993 remaining_words =
2994 (BCC(smb_buffer_response)
2995 - 1) / 2;
2996 /* Must word align unicode strings */
2997 bcc_ptr++;
2998 } else {
2999 remaining_words =
3000 BCC
3001 (smb_buffer_response) / 2;
3002 }
3003 len =
3004 UniStrnlen((wchar_t *) bcc_ptr,
3005 remaining_words - 1);
3006 /* We look for obvious messed up bcc or strings in response so we do not go off
3007 the end since (at least) WIN2K and Windows XP have a major bug in not null
3008 terminating last Unicode string in response */
3009 if (ses->serverOS)
3010 kfree(ses->serverOS);
3011 ses->serverOS =
3012 kzalloc(2 * (len + 1), GFP_KERNEL);
3013 cifs_strfromUCS_le(ses->serverOS,
3014 (__le16 *)
3015 bcc_ptr, len,
3016 nls_codepage);
3017 bcc_ptr += 2 * (len + 1);
3018 remaining_words -= len + 1;
3019 ses->serverOS[2 * len] = 0;
3020 ses->serverOS[1 + (2 * len)] = 0;
3021 if (remaining_words > 0) {
3022 len = UniStrnlen((wchar_t *)
3023 bcc_ptr,
3024 remaining_words
3025 - 1);
3026 kfree(ses->serverNOS);
3027 ses->serverNOS =
3028 kzalloc(2 * (len + 1),
3029 GFP_KERNEL);
3030 cifs_strfromUCS_le(ses->
3031 serverNOS,
3032 (__le16 *)
3033 bcc_ptr,
3034 len,
3035 nls_codepage);
3036 bcc_ptr += 2 * (len + 1);
3037 ses->serverNOS[2 * len] = 0;
3038 ses->serverNOS[1 +
3039 (2 * len)] = 0;
3040 remaining_words -= len + 1;
3041 if (remaining_words > 0) {
3042 len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
3043 /* last string not always null terminated
3044 (for e.g. for Windows XP & 2000) */
3045 kfree(ses->serverDomain);
3046 ses->serverDomain =
3047 kzalloc(2 *
3048 (len +
3049 1),
3050 GFP_KERNEL);
3051 cifs_strfromUCS_le
3052 (ses->serverDomain,
3053 (__le16 *)bcc_ptr,
3054 len, nls_codepage);
3055 bcc_ptr +=
3056 2 * (len + 1);
3057 ses->serverDomain[2*len]
3058 = 0;
3059 ses->serverDomain
3060 [1 + (2 * len)]
3061 = 0;
3062 } /* else no more room so create dummy domain string */
3063 else {
3064 kfree(ses->serverDomain);
3065 ses->serverDomain =
3066 kzalloc(2,
3067 GFP_KERNEL);
3068 }
3069 } else { /* no room so create dummy domain and NOS string */
3070 kfree(ses->serverDomain);
3071 ses->serverDomain =
3072 kzalloc(2, GFP_KERNEL);
3073 kfree(ses->serverNOS);
3074 ses->serverNOS =
3075 kzalloc(2, GFP_KERNEL);
3076 }
3077 } else { /* ASCII */
3078 len = strnlen(bcc_ptr, 1024);
3079 if (((long) bcc_ptr + len) - (long)
3080 pByteArea(smb_buffer_response)
3081 <= BCC(smb_buffer_response)) {
3082 if (ses->serverOS)
3083 kfree(ses->serverOS);
3084 ses->serverOS =
3085 kzalloc(len + 1,
3086 GFP_KERNEL);
3087 strncpy(ses->serverOS,
3088 bcc_ptr, len);
3089
3090 bcc_ptr += len;
3091 bcc_ptr[0] = 0; /* null terminate string */
3092 bcc_ptr++;
3093
3094 len = strnlen(bcc_ptr, 1024);
3095 kfree(ses->serverNOS);
3096 ses->serverNOS =
3097 kzalloc(len + 1,
3098 GFP_KERNEL);
3099 strncpy(ses->serverNOS, bcc_ptr, len);
3100 bcc_ptr += len;
3101 bcc_ptr[0] = 0;
3102 bcc_ptr++;
3103
3104 len = strnlen(bcc_ptr, 1024);
3105 kfree(ses->serverDomain);
3106 ses->serverDomain =
3107 kzalloc(len + 1,
3108 GFP_KERNEL);
3109 strncpy(ses->serverDomain,
3110 bcc_ptr, len);
3111 bcc_ptr += len;
3112 bcc_ptr[0] = 0;
3113 bcc_ptr++;
3114 } else
3115 cFYI(1,
3116 ("field of length %d "
3117 "extends beyond end of smb",
3118 len));
3119 }
3120 } else {
3121 cERROR(1, ("Security Blob Length extends beyond"
3122 " end of SMB"));
3123 }
3124 } else {
3125 cERROR(1, ("No session structure passed in."));
3126 }
3127 } else {
3128 cERROR(1, ("Invalid Word count %d:",
3129 smb_buffer_response->WordCount));
3130 rc = -EIO;
3131 }
3132
3133 cifs_buf_release(smb_buffer);
3134
3135 return rc;
3136 }
3137 static int
3138 CIFSNTLMSSPAuthSessSetup(unsigned int xid, struct cifsSesInfo *ses,
3139 char *ntlm_session_key, bool ntlmv2_flag,
3140 const struct nls_table *nls_codepage)
3141 {
3142 struct smb_hdr *smb_buffer;
3143 struct smb_hdr *smb_buffer_response;
3144 SESSION_SETUP_ANDX *pSMB;
3145 SESSION_SETUP_ANDX *pSMBr;
3146 char *bcc_ptr;
3147 char *user;
3148 char *domain;
3149 int rc = 0;
3150 int remaining_words = 0;
3151 int bytes_returned = 0;
3152 int len;
3153 int SecurityBlobLength = sizeof(AUTHENTICATE_MESSAGE);
3154 PAUTHENTICATE_MESSAGE SecurityBlob;
3155 __u32 negotiate_flags, capabilities;
3156 __u16 count;
3157
3158 cFYI(1, ("In NTLMSSPSessSetup (Authenticate)"));
3159 if (ses == NULL)
3160 return -EINVAL;
3161 user = ses->userName;
3162 domain = ses->domainName;
3163 smb_buffer = cifs_buf_get();
3164 if (smb_buffer == NULL) {
3165 return -ENOMEM;
3166 }
3167 smb_buffer_response = smb_buffer;
3168 pSMB = (SESSION_SETUP_ANDX *)smb_buffer;
3169 pSMBr = (SESSION_SETUP_ANDX *)smb_buffer_response;
3170
3171 /* send SMBsessionSetup here */
3172 header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
3173 NULL /* no tCon exists yet */ , 12 /* wct */ );
3174
3175 smb_buffer->Mid = GetNextMid(ses->server);
3176 pSMB->req.hdr.Flags |= (SMBFLG_CASELESS | SMBFLG_CANONICAL_PATH_FORMAT);
3177 pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
3178 pSMB->req.AndXCommand = 0xFF;
3179 pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
3180 pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
3181
3182 pSMB->req.hdr.Uid = ses->Suid;
3183
3184 if (ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
3185 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
3186
3187 capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
3188 CAP_EXTENDED_SECURITY;
3189 if (ses->capabilities & CAP_UNICODE) {
3190 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
3191 capabilities |= CAP_UNICODE;
3192 }
3193 if (ses->capabilities & CAP_STATUS32) {
3194 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
3195 capabilities |= CAP_STATUS32;
3196 }
3197 if (ses->capabilities & CAP_DFS) {
3198 smb_buffer->Flags2 |= SMBFLG2_DFS;
3199 capabilities |= CAP_DFS;
3200 }
3201 pSMB->req.Capabilities = cpu_to_le32(capabilities);
3202
3203 bcc_ptr = (char *)&pSMB->req.SecurityBlob;
3204 SecurityBlob = (PAUTHENTICATE_MESSAGE)bcc_ptr;
3205 strncpy(SecurityBlob->Signature, NTLMSSP_SIGNATURE, 8);
3206 SecurityBlob->MessageType = NtLmAuthenticate;
3207 bcc_ptr += SecurityBlobLength;
3208 negotiate_flags = NTLMSSP_NEGOTIATE_UNICODE | NTLMSSP_REQUEST_TARGET |
3209 NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_TARGET_INFO |
3210 0x80000000 | NTLMSSP_NEGOTIATE_128;
3211 if (sign_CIFS_PDUs)
3212 negotiate_flags |= /* NTLMSSP_NEGOTIATE_ALWAYS_SIGN |*/ NTLMSSP_NEGOTIATE_SIGN;
3213 if (ntlmv2_flag)
3214 negotiate_flags |= NTLMSSP_NEGOTIATE_NTLMV2;
3215
3216 /* setup pointers to domain name and workstation name */
3217
3218 SecurityBlob->WorkstationName.Buffer = 0;
3219 SecurityBlob->WorkstationName.Length = 0;
3220 SecurityBlob->WorkstationName.MaximumLength = 0;
3221 SecurityBlob->SessionKey.Length = 0;
3222 SecurityBlob->SessionKey.MaximumLength = 0;
3223 SecurityBlob->SessionKey.Buffer = 0;
3224
3225 SecurityBlob->LmChallengeResponse.Length = 0;
3226 SecurityBlob->LmChallengeResponse.MaximumLength = 0;
3227 SecurityBlob->LmChallengeResponse.Buffer = 0;
3228
3229 SecurityBlob->NtChallengeResponse.Length =
3230 cpu_to_le16(CIFS_SESS_KEY_SIZE);
3231 SecurityBlob->NtChallengeResponse.MaximumLength =
3232 cpu_to_le16(CIFS_SESS_KEY_SIZE);
3233 memcpy(bcc_ptr, ntlm_session_key, CIFS_SESS_KEY_SIZE);
3234 SecurityBlob->NtChallengeResponse.Buffer =
3235 cpu_to_le32(SecurityBlobLength);
3236 SecurityBlobLength += CIFS_SESS_KEY_SIZE;
3237 bcc_ptr += CIFS_SESS_KEY_SIZE;
3238
3239 if (ses->capabilities & CAP_UNICODE) {
3240 if (domain == NULL) {
3241 SecurityBlob->DomainName.Buffer = 0;
3242 SecurityBlob->DomainName.Length = 0;
3243 SecurityBlob->DomainName.MaximumLength = 0;
3244 } else {
3245 __u16 ln = cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
3246 nls_codepage);
3247 ln *= 2;
3248 SecurityBlob->DomainName.MaximumLength =
3249 cpu_to_le16(ln);
3250 SecurityBlob->DomainName.Buffer =
3251 cpu_to_le32(SecurityBlobLength);
3252 bcc_ptr += ln;
3253 SecurityBlobLength += ln;
3254 SecurityBlob->DomainName.Length = cpu_to_le16(ln);
3255 }
3256 if (user == NULL) {
3257 SecurityBlob->UserName.Buffer = 0;
3258 SecurityBlob->UserName.Length = 0;
3259 SecurityBlob->UserName.MaximumLength = 0;
3260 } else {
3261 __u16 ln = cifs_strtoUCS((__le16 *) bcc_ptr, user, 64,
3262 nls_codepage);
3263 ln *= 2;
3264 SecurityBlob->UserName.MaximumLength =
3265 cpu_to_le16(ln);
3266 SecurityBlob->UserName.Buffer =
3267 cpu_to_le32(SecurityBlobLength);
3268 bcc_ptr += ln;
3269 SecurityBlobLength += ln;
3270 SecurityBlob->UserName.Length = cpu_to_le16(ln);
3271 }
3272
3273 /* SecurityBlob->WorkstationName.Length =
3274 cifs_strtoUCS((__le16 *) bcc_ptr, "AMACHINE",64, nls_codepage);
3275 SecurityBlob->WorkstationName.Length *= 2;
3276 SecurityBlob->WorkstationName.MaximumLength =
3277 cpu_to_le16(SecurityBlob->WorkstationName.Length);
3278 SecurityBlob->WorkstationName.Buffer =
3279 cpu_to_le32(SecurityBlobLength);
3280 bcc_ptr += SecurityBlob->WorkstationName.Length;
3281 SecurityBlobLength += SecurityBlob->WorkstationName.Length;
3282 SecurityBlob->WorkstationName.Length =
3283 cpu_to_le16(SecurityBlob->WorkstationName.Length); */
3284
3285 if ((long) bcc_ptr % 2) {
3286 *bcc_ptr = 0;
3287 bcc_ptr++;
3288 }
3289 bytes_returned =
3290 cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
3291 32, nls_codepage);
3292 bcc_ptr += 2 * bytes_returned;
3293 bytes_returned =
3294 cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release, 32,
3295 nls_codepage);
3296 bcc_ptr += 2 * bytes_returned;
3297 bcc_ptr += 2; /* null term version string */
3298 bytes_returned =
3299 cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
3300 64, nls_codepage);
3301 bcc_ptr += 2 * bytes_returned;
3302 *(bcc_ptr + 1) = 0;
3303 *(bcc_ptr + 2) = 0;
3304 bcc_ptr += 2; /* null terminate network opsys string */
3305 *(bcc_ptr + 1) = 0;
3306 *(bcc_ptr + 2) = 0;
3307 bcc_ptr += 2; /* null domain */
3308 } else { /* ASCII */
3309 if (domain == NULL) {
3310 SecurityBlob->DomainName.Buffer = 0;
3311 SecurityBlob->DomainName.Length = 0;
3312 SecurityBlob->DomainName.MaximumLength = 0;
3313 } else {
3314 __u16 ln;
3315 negotiate_flags |= NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED;
3316 strncpy(bcc_ptr, domain, 63);
3317 ln = strnlen(domain, 64);
3318 SecurityBlob->DomainName.MaximumLength =
3319 cpu_to_le16(ln);
3320 SecurityBlob->DomainName.Buffer =
3321 cpu_to_le32(SecurityBlobLength);
3322 bcc_ptr += ln;
3323 SecurityBlobLength += ln;
3324 SecurityBlob->DomainName.Length = cpu_to_le16(ln);
3325 }
3326 if (user == NULL) {
3327 SecurityBlob->UserName.Buffer = 0;
3328 SecurityBlob->UserName.Length = 0;
3329 SecurityBlob->UserName.MaximumLength = 0;
3330 } else {
3331 __u16 ln;
3332 strncpy(bcc_ptr, user, 63);
3333 ln = strnlen(user, 64);
3334 SecurityBlob->UserName.MaximumLength = cpu_to_le16(ln);
3335 SecurityBlob->UserName.Buffer =
3336 cpu_to_le32(SecurityBlobLength);
3337 bcc_ptr += ln;
3338 SecurityBlobLength += ln;
3339 SecurityBlob->UserName.Length = cpu_to_le16(ln);
3340 }
3341 /* BB fill in our workstation name if known BB */
3342
3343 strcpy(bcc_ptr, "Linux version ");
3344 bcc_ptr += strlen("Linux version ");
3345 strcpy(bcc_ptr, utsname()->release);
3346 bcc_ptr += strlen(utsname()->release) + 1;
3347 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
3348 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
3349 bcc_ptr++; /* null domain */
3350 *bcc_ptr = 0;
3351 }
3352 SecurityBlob->NegotiateFlags = cpu_to_le32(negotiate_flags);
3353 pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
3354 count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
3355 smb_buffer->smb_buf_length += count;
3356 pSMB->req.ByteCount = cpu_to_le16(count);
3357
3358 rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
3359 &bytes_returned, CIFS_LONG_OP);
3360 if (rc) {
3361 /* rc = map_smb_to_linux_error(smb_buffer_response) done in SendReceive now */
3362 } else if ((smb_buffer_response->WordCount == 3) ||
3363 (smb_buffer_response->WordCount == 4)) {
3364 __u16 action = le16_to_cpu(pSMBr->resp.Action);
3365 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
3366 if (action & GUEST_LOGIN)
3367 cFYI(1, ("Guest login")); /* BB Should we set anything
3368 in SesInfo struct ? */
3369 /* if (SecurityBlob2->MessageType != NtLm??) {
3370 cFYI("Unexpected message type on auth response is %d"));
3371 } */
3372
3373 if (ses) {
3374 cFYI(1,
3375 ("Check challenge UID %d vs auth response UID %d",
3376 ses->Suid, smb_buffer_response->Uid));
3377 /* UID left in wire format */
3378 ses->Suid = smb_buffer_response->Uid;
3379 bcc_ptr = pByteArea(smb_buffer_response);
3380 /* response can have either 3 or 4 word count - Samba sends 3 */
3381 if ((pSMBr->resp.hdr.WordCount == 3)
3382 || ((pSMBr->resp.hdr.WordCount == 4)
3383 && (blob_len <
3384 pSMBr->resp.ByteCount))) {
3385 if (pSMBr->resp.hdr.WordCount == 4) {
3386 bcc_ptr +=
3387 blob_len;
3388 cFYI(1,
3389 ("Security Blob Length %d ",
3390 blob_len));
3391 }
3392
3393 cFYI(1,
3394 ("NTLMSSP response to Authenticate "));
3395
3396 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
3397 if ((long) (bcc_ptr) % 2) {
3398 remaining_words =
3399 (BCC(smb_buffer_response)
3400 - 1) / 2;
3401 bcc_ptr++; /* Unicode strings must be word aligned */
3402 } else {
3403 remaining_words = BCC(smb_buffer_response) / 2;
3404 }
3405 len = UniStrnlen((wchar_t *) bcc_ptr,
3406 remaining_words - 1);
3407 /* We look for obvious messed up bcc or strings in response so we do not go off
3408 the end since (at least) WIN2K and Windows XP have a major bug in not null
3409 terminating last Unicode string in response */
3410 if (ses->serverOS)
3411 kfree(ses->serverOS);
3412 ses->serverOS =
3413 kzalloc(2 * (len + 1), GFP_KERNEL);
3414 cifs_strfromUCS_le(ses->serverOS,
3415 (__le16 *)
3416 bcc_ptr, len,
3417 nls_codepage);
3418 bcc_ptr += 2 * (len + 1);
3419 remaining_words -= len + 1;
3420 ses->serverOS[2 * len] = 0;
3421 ses->serverOS[1 + (2 * len)] = 0;
3422 if (remaining_words > 0) {
3423 len = UniStrnlen((wchar_t *)
3424 bcc_ptr,
3425 remaining_words
3426 - 1);
3427 kfree(ses->serverNOS);
3428 ses->serverNOS =
3429 kzalloc(2 * (len + 1),
3430 GFP_KERNEL);
3431 cifs_strfromUCS_le(ses->
3432 serverNOS,
3433 (__le16 *)
3434 bcc_ptr,
3435 len,
3436 nls_codepage);
3437 bcc_ptr += 2 * (len + 1);
3438 ses->serverNOS[2 * len] = 0;
3439 ses->serverNOS[1+(2*len)] = 0;
3440 remaining_words -= len + 1;
3441 if (remaining_words > 0) {
3442 len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
3443 /* last string not always null terminated (e.g. for Windows XP & 2000) */
3444 if (ses->serverDomain)
3445 kfree(ses->serverDomain);
3446 ses->serverDomain =
3447 kzalloc(2 *
3448 (len +
3449 1),
3450 GFP_KERNEL);
3451 cifs_strfromUCS_le
3452 (ses->
3453 serverDomain,
3454 (__le16 *)
3455 bcc_ptr, len,
3456 nls_codepage);
3457 bcc_ptr +=
3458 2 * (len + 1);
3459 ses->
3460 serverDomain[2
3461 * len]
3462 = 0;
3463 ses->
3464 serverDomain[1
3465 +
3466 (2
3467 *
3468 len)]
3469 = 0;
3470 } /* else no more room so create dummy domain string */
3471 else {
3472 if (ses->serverDomain)
3473 kfree(ses->serverDomain);
3474 ses->serverDomain = kzalloc(2,GFP_KERNEL);
3475 }
3476 } else { /* no room so create dummy domain and NOS string */
3477 if (ses->serverDomain)
3478 kfree(ses->serverDomain);
3479 ses->serverDomain = kzalloc(2, GFP_KERNEL);
3480 kfree(ses->serverNOS);
3481 ses->serverNOS = kzalloc(2, GFP_KERNEL);
3482 }
3483 } else { /* ASCII */
3484 len = strnlen(bcc_ptr, 1024);
3485 if (((long) bcc_ptr + len) -
3486 (long) pByteArea(smb_buffer_response)
3487 <= BCC(smb_buffer_response)) {
3488 if (ses->serverOS)
3489 kfree(ses->serverOS);
3490 ses->serverOS = kzalloc(len + 1, GFP_KERNEL);
3491 strncpy(ses->serverOS,bcc_ptr, len);
3492
3493 bcc_ptr += len;
3494 bcc_ptr[0] = 0; /* null terminate the string */
3495 bcc_ptr++;
3496
3497 len = strnlen(bcc_ptr, 1024);
3498 kfree(ses->serverNOS);
3499 ses->serverNOS = kzalloc(len+1,
3500 GFP_KERNEL);
3501 strncpy(ses->serverNOS,
3502 bcc_ptr, len);
3503 bcc_ptr += len;
3504 bcc_ptr[0] = 0;
3505 bcc_ptr++;
3506
3507 len = strnlen(bcc_ptr, 1024);
3508 if (ses->serverDomain)
3509 kfree(ses->serverDomain);
3510 ses->serverDomain =
3511 kzalloc(len+1,
3512 GFP_KERNEL);
3513 strncpy(ses->serverDomain,
3514 bcc_ptr, len);
3515 bcc_ptr += len;
3516 bcc_ptr[0] = 0;
3517 bcc_ptr++;
3518 } else
3519 cFYI(1, ("field of length %d "
3520 "extends beyond end of smb ",
3521 len));
3522 }
3523 } else {
3524 cERROR(1, ("Security Blob extends beyond end "
3525 "of SMB"));
3526 }
3527 } else {
3528 cERROR(1, ("No session structure passed in."));
3529 }
3530 } else {
3531 cERROR(1, ("Invalid Word count %d: ",
3532 smb_buffer_response->WordCount));
3533 rc = -EIO;
3534 }
3535
3536 cifs_buf_release(smb_buffer);
3537
3538 return rc;
3539 }
3540
3541 int
3542 CIFSTCon(unsigned int xid, struct cifsSesInfo *ses,
3543 const char *tree, struct cifsTconInfo *tcon,
3544 const struct nls_table *nls_codepage)
3545 {
3546 struct smb_hdr *smb_buffer;
3547 struct smb_hdr *smb_buffer_response;
3548 TCONX_REQ *pSMB;
3549 TCONX_RSP *pSMBr;
3550 unsigned char *bcc_ptr;
3551 int rc = 0;
3552 int length;
3553 __u16 count;
3554
3555 if (ses == NULL)
3556 return -EIO;
3557
3558 smb_buffer = cifs_buf_get();
3559 if (smb_buffer == NULL) {
3560 return -ENOMEM;
3561 }
3562 smb_buffer_response = smb_buffer;
3563
3564 header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX,
3565 NULL /*no tid */ , 4 /*wct */ );
3566
3567 smb_buffer->Mid = GetNextMid(ses->server);
3568 smb_buffer->Uid = ses->Suid;
3569 pSMB = (TCONX_REQ *) smb_buffer;
3570 pSMBr = (TCONX_RSP *) smb_buffer_response;
3571
3572 pSMB->AndXCommand = 0xFF;
3573 pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO);
3574 bcc_ptr = &pSMB->Password[0];
3575 if ((ses->server->secMode) & SECMODE_USER) {
3576 pSMB->PasswordLength = cpu_to_le16(1); /* minimum */
3577 *bcc_ptr = 0; /* password is null byte */
3578 bcc_ptr++; /* skip password */
3579 /* already aligned so no need to do it below */
3580 } else {
3581 pSMB->PasswordLength = cpu_to_le16(CIFS_SESS_KEY_SIZE);
3582 /* BB FIXME add code to fail this if NTLMv2 or Kerberos
3583 specified as required (when that support is added to
3584 the vfs in the future) as only NTLM or the much
3585 weaker LANMAN (which we do not send by default) is accepted
3586 by Samba (not sure whether other servers allow
3587 NTLMv2 password here) */
3588 #ifdef CONFIG_CIFS_WEAK_PW_HASH
3589 if ((extended_security & CIFSSEC_MAY_LANMAN) &&
3590 (ses->server->secType == LANMAN))
3591 calc_lanman_hash(tcon->password, ses->server->cryptKey,
3592 ses->server->secMode &
3593 SECMODE_PW_ENCRYPT ? true : false,
3594 bcc_ptr);
3595 else
3596 #endif /* CIFS_WEAK_PW_HASH */
3597 SMBNTencrypt(tcon->password, ses->server->cryptKey,
3598 bcc_ptr);
3599
3600 bcc_ptr += CIFS_SESS_KEY_SIZE;
3601 if (ses->capabilities & CAP_UNICODE) {
3602 /* must align unicode strings */
3603 *bcc_ptr = 0; /* null byte password */
3604 bcc_ptr++;
3605 }
3606 }
3607
3608 if (ses->server->secMode &
3609 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
3610 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
3611
3612 if (ses->capabilities & CAP_STATUS32) {
3613 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
3614 }
3615 if (ses->capabilities & CAP_DFS) {
3616 smb_buffer->Flags2 |= SMBFLG2_DFS;
3617 }
3618 if (ses->capabilities & CAP_UNICODE) {
3619 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
3620 length =
3621 cifs_strtoUCS((__le16 *) bcc_ptr, tree,
3622 6 /* max utf8 char length in bytes */ *
3623 (/* server len*/ + 256 /* share len */), nls_codepage);
3624 bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */
3625 bcc_ptr += 2; /* skip trailing null */
3626 } else { /* ASCII */
3627 strcpy(bcc_ptr, tree);
3628 bcc_ptr += strlen(tree) + 1;
3629 }
3630 strcpy(bcc_ptr, "?????");
3631 bcc_ptr += strlen("?????");
3632 bcc_ptr += 1;
3633 count = bcc_ptr - &pSMB->Password[0];
3634 pSMB->hdr.smb_buf_length += count;
3635 pSMB->ByteCount = cpu_to_le16(count);
3636
3637 rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length,
3638 CIFS_STD_OP);
3639
3640 /* if (rc) rc = map_smb_to_linux_error(smb_buffer_response); */
3641 /* above now done in SendReceive */
3642 if ((rc == 0) && (tcon != NULL)) {
3643 tcon->tidStatus = CifsGood;
3644 tcon->need_reconnect = false;
3645 tcon->tid = smb_buffer_response->Tid;
3646 bcc_ptr = pByteArea(smb_buffer_response);
3647 length = strnlen(bcc_ptr, BCC(smb_buffer_response) - 2);
3648 /* skip service field (NB: this field is always ASCII) */
3649 if (length == 3) {
3650 if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') &&
3651 (bcc_ptr[2] == 'C')) {
3652 cFYI(1, ("IPC connection"));
3653 tcon->ipc = 1;
3654 }
3655 } else if (length == 2) {
3656 if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) {
3657 /* the most common case */
3658 cFYI(1, ("disk share connection"));
3659 }
3660 }
3661 bcc_ptr += length + 1;
3662 strncpy(tcon->treeName, tree, MAX_TREE_SIZE);
3663 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
3664 length = UniStrnlen((wchar_t *) bcc_ptr, 512);
3665 if ((bcc_ptr + (2 * length)) -
3666 pByteArea(smb_buffer_response) <=
3667 BCC(smb_buffer_response)) {
3668 kfree(tcon->nativeFileSystem);
3669 tcon->nativeFileSystem =
3670 kzalloc((4 * length) + 2, GFP_KERNEL);
3671 if (tcon->nativeFileSystem)
3672 cifs_strfromUCS_le(
3673 tcon->nativeFileSystem,
3674 (__le16 *) bcc_ptr,
3675 length, nls_codepage);
3676 }
3677 /* else do not bother copying these information fields*/
3678 } else {
3679 length = strnlen(bcc_ptr, 1024);
3680 if ((bcc_ptr + length) -
3681 pByteArea(smb_buffer_response) <=
3682 BCC(smb_buffer_response)) {
3683 kfree(tcon->nativeFileSystem);
3684 tcon->nativeFileSystem =
3685 kzalloc(length + 1, GFP_KERNEL);
3686 if (tcon->nativeFileSystem)
3687 strncpy(tcon->nativeFileSystem, bcc_ptr,
3688 length);
3689 }
3690 /* else do not bother copying these information fields*/
3691 }
3692 if ((smb_buffer_response->WordCount == 3) ||
3693 (smb_buffer_response->WordCount == 7))
3694 /* field is in same location */
3695 tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport);
3696 else
3697 tcon->Flags = 0;
3698 cFYI(1, ("Tcon flags: 0x%x ", tcon->Flags));
3699 } else if ((rc == 0) && tcon == NULL) {
3700 /* all we need to save for IPC$ connection */
3701 ses->ipc_tid = smb_buffer_response->Tid;
3702 }
3703
3704 cifs_buf_release(smb_buffer);
3705 return rc;
3706 }
3707
3708 int
3709 cifs_umount(struct super_block *sb, struct cifs_sb_info *cifs_sb)
3710 {
3711 int rc = 0;
3712 char *tmp;
3713
3714 if (cifs_sb->tcon)
3715 cifs_put_tcon(cifs_sb->tcon);
3716
3717 cifs_sb->tcon = NULL;
3718 tmp = cifs_sb->prepath;
3719 cifs_sb->prepathlen = 0;
3720 cifs_sb->prepath = NULL;
3721 kfree(tmp);
3722
3723 return rc;
3724 }
3725
3726 int cifs_setup_session(unsigned int xid, struct cifsSesInfo *pSesInfo,
3727 struct nls_table *nls_info)
3728 {
3729 int rc = 0;
3730 char ntlm_session_key[CIFS_SESS_KEY_SIZE];
3731 bool ntlmv2_flag = false;
3732 int first_time = 0;
3733 struct TCP_Server_Info *server = pSesInfo->server;
3734
3735 /* what if server changes its buffer size after dropping the session? */
3736 if (server->maxBuf == 0) /* no need to send on reconnect */ {
3737 rc = CIFSSMBNegotiate(xid, pSesInfo);
3738 if (rc == -EAGAIN) {
3739 /* retry only once on 1st time connection */
3740 rc = CIFSSMBNegotiate(xid, pSesInfo);
3741 if (rc == -EAGAIN)
3742 rc = -EHOSTDOWN;
3743 }
3744 if (rc == 0) {
3745 spin_lock(&GlobalMid_Lock);
3746 if (server->tcpStatus != CifsExiting)
3747 server->tcpStatus = CifsGood;
3748 else
3749 rc = -EHOSTDOWN;
3750 spin_unlock(&GlobalMid_Lock);
3751
3752 }
3753 first_time = 1;
3754 }
3755
3756 if (rc)
3757 goto ss_err_exit;
3758
3759 pSesInfo->flags = 0;
3760 pSesInfo->capabilities = server->capabilities;
3761 if (linuxExtEnabled == 0)
3762 pSesInfo->capabilities &= (~CAP_UNIX);
3763 /* pSesInfo->sequence_number = 0;*/
3764 cFYI(1, ("Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d",
3765 server->secMode, server->capabilities, server->timeAdj));
3766
3767 if (experimEnabled < 2)
3768 rc = CIFS_SessSetup(xid, pSesInfo, first_time, nls_info);
3769 else if (extended_security
3770 && (pSesInfo->capabilities & CAP_EXTENDED_SECURITY)
3771 && (server->secType == NTLMSSP)) {
3772 rc = -EOPNOTSUPP;
3773 } else if (extended_security
3774 && (pSesInfo->capabilities & CAP_EXTENDED_SECURITY)
3775 && (server->secType == RawNTLMSSP)) {
3776 cFYI(1, ("NTLMSSP sesssetup"));
3777 rc = CIFSNTLMSSPNegotiateSessSetup(xid, pSesInfo, &ntlmv2_flag,
3778 nls_info);
3779 if (!rc) {
3780 if (ntlmv2_flag) {
3781 char *v2_response;
3782 cFYI(1, ("more secure NTLM ver2 hash"));
3783 if (CalcNTLMv2_partial_mac_key(pSesInfo,
3784 nls_info)) {
3785 rc = -ENOMEM;
3786 goto ss_err_exit;
3787 } else
3788 v2_response = kmalloc(16 + 64 /* blob*/,
3789 GFP_KERNEL);
3790 if (v2_response) {
3791 CalcNTLMv2_response(pSesInfo,
3792 v2_response);
3793 /* if (first_time)
3794 cifs_calculate_ntlmv2_mac_key */
3795 kfree(v2_response);
3796 /* BB Put dummy sig in SessSetup PDU? */
3797 } else {
3798 rc = -ENOMEM;
3799 goto ss_err_exit;
3800 }
3801
3802 } else {
3803 SMBNTencrypt(pSesInfo->password,
3804 server->cryptKey,
3805 ntlm_session_key);
3806
3807 if (first_time)
3808 cifs_calculate_mac_key(
3809 &server->mac_signing_key,
3810 ntlm_session_key,
3811 pSesInfo->password);
3812 }
3813 /* for better security the weaker lanman hash not sent
3814 in AuthSessSetup so we no longer calculate it */
3815
3816 rc = CIFSNTLMSSPAuthSessSetup(xid, pSesInfo,
3817 ntlm_session_key,
3818 ntlmv2_flag,
3819 nls_info);
3820 }
3821 } else { /* old style NTLM 0.12 session setup */
3822 SMBNTencrypt(pSesInfo->password, server->cryptKey,
3823 ntlm_session_key);
3824
3825 if (first_time)
3826 cifs_calculate_mac_key(&server->mac_signing_key,
3827 ntlm_session_key,
3828 pSesInfo->password);
3829
3830 rc = CIFSSessSetup(xid, pSesInfo, ntlm_session_key, nls_info);
3831 }
3832 if (rc) {
3833 cERROR(1, ("Send error in SessSetup = %d", rc));
3834 } else {
3835 cFYI(1, ("CIFS Session Established successfully"));
3836 spin_lock(&GlobalMid_Lock);
3837 pSesInfo->status = CifsGood;
3838 pSesInfo->need_reconnect = false;
3839 spin_unlock(&GlobalMid_Lock);
3840 }
3841
3842 ss_err_exit:
3843 return rc;
3844 }
3845
Nao low-level kernelspace/userspace library that runs on our robots, Nao-Team HTWK