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cris: define __fls
[linux-2.6/x86.git] / fs / cifs / connect.c
blobe9ea394ee075d0ef20ab7900d111c5bd6a6e20c6
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/ipv6.h>
27 #include <linux/pagemap.h>
28 #include <linux/ctype.h>
29 #include <linux/utsname.h>
30 #include <linux/mempool.h>
31 #include <linux/delay.h>
32 #include <linux/completion.h>
33 #include <linux/kthread.h>
34 #include <linux/pagevec.h>
35 #include <linux/freezer.h>
36 #include <asm/uaccess.h>
37 #include <asm/processor.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 *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->sa_family == AF_INET &&
1378 (addr4->sin_addr.s_addr !=
1379 server->addr.sockAddr.sin_addr.s_addr))
1380 continue;
1381 else if (addr->sa_family == AF_INET6 &&
1382 memcmp(&server->addr.sockAddr6.sin6_addr,
1383 &addr6->sin6_addr, sizeof(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 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));
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.sa_family = AF_INET6;
1439 } else {
1440 addr.sa_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.sa_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 = 3 * 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(socket, smb_buf, 0x44,
1864 (struct sockaddr *) &server->addr.sockAddr,
1865 server->noblocksnd);
1866 kfree(ses_init_buf);
1867 msleep(1); /* RFC1001 layer in at least one server
1868 requires very short break before negprot
1869 presumably because not expecting negprot
1870 to follow so fast. This is a simple
1871 solution that works without
1872 complicating the code and causes no
1873 significant slowing down on mount
1874 for everyone else */
1875 }
1876 /* else the negprot may still work without this
1877 even though malloc failed */
1878
1879 }
1880
1881 return rc;
1882 }
1883
1884 static int
1885 ipv6_connect(struct TCP_Server_Info *server)
1886 {
1887 int rc = 0;
1888 bool connected = false;
1889 __be16 orig_port = 0;
1890 struct socket *socket = server->ssocket;
1891
1892 if (socket == NULL) {
1893 rc = sock_create_kern(PF_INET6, SOCK_STREAM,
1894 IPPROTO_TCP, &socket);
1895 if (rc < 0) {
1896 cERROR(1, ("Error %d creating ipv6 socket", rc));
1897 socket = NULL;
1898 return rc;
1899 }
1900
1901 /* BB other socket options to set KEEPALIVE, NODELAY? */
1902 cFYI(1, ("ipv6 Socket created"));
1903 server->ssocket = socket;
1904 socket->sk->sk_allocation = GFP_NOFS;
1905 cifs_reclassify_socket6(socket);
1906 }
1907
1908 /* user overrode default port */
1909 if (server->addr.sockAddr6.sin6_port) {
1910 rc = socket->ops->connect(socket,
1911 (struct sockaddr *) &server->addr.sockAddr6,
1912 sizeof(struct sockaddr_in6), 0);
1913 if (rc >= 0)
1914 connected = true;
1915 }
1916
1917 if (!connected) {
1918 /* save original port so we can retry user specified port
1919 later if fall back ports fail this time */
1920
1921 orig_port = server->addr.sockAddr6.sin6_port;
1922 /* do not retry on the same port we just failed on */
1923 if (server->addr.sockAddr6.sin6_port != htons(CIFS_PORT)) {
1924 server->addr.sockAddr6.sin6_port = htons(CIFS_PORT);
1925 rc = socket->ops->connect(socket, (struct sockaddr *)
1926 &server->addr.sockAddr6,
1927 sizeof(struct sockaddr_in6), 0);
1928 if (rc >= 0)
1929 connected = true;
1930 }
1931 }
1932 if (!connected) {
1933 server->addr.sockAddr6.sin6_port = htons(RFC1001_PORT);
1934 rc = socket->ops->connect(socket, (struct sockaddr *)
1935 &server->addr.sockAddr6,
1936 sizeof(struct sockaddr_in6), 0);
1937 if (rc >= 0)
1938 connected = true;
1939 }
1940
1941 /* give up here - unless we want to retry on different
1942 protocol families some day */
1943 if (!connected) {
1944 if (orig_port)
1945 server->addr.sockAddr6.sin6_port = orig_port;
1946 cFYI(1, ("Error %d connecting to server via ipv6", rc));
1947 sock_release(socket);
1948 server->ssocket = NULL;
1949 return rc;
1950 }
1951
1952 /*
1953 * Eventually check for other socket options to change from
1954 * the default. sock_setsockopt not used because it expects
1955 * user space buffer
1956 */
1957 socket->sk->sk_rcvtimeo = 7 * HZ;
1958 socket->sk->sk_sndtimeo = 3 * HZ;
1959 server->ssocket = socket;
1960
1961 return rc;
1962 }
1963
1964 void reset_cifs_unix_caps(int xid, struct cifsTconInfo *tcon,
1965 struct super_block *sb, struct smb_vol *vol_info)
1966 {
1967 /* if we are reconnecting then should we check to see if
1968 * any requested capabilities changed locally e.g. via
1969 * remount but we can not do much about it here
1970 * if they have (even if we could detect it by the following)
1971 * Perhaps we could add a backpointer to array of sb from tcon
1972 * or if we change to make all sb to same share the same
1973 * sb as NFS - then we only have one backpointer to sb.
1974 * What if we wanted to mount the server share twice once with
1975 * and once without posixacls or posix paths? */
1976 __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
1977
1978 if (vol_info && vol_info->no_linux_ext) {
1979 tcon->fsUnixInfo.Capability = 0;
1980 tcon->unix_ext = 0; /* Unix Extensions disabled */
1981 cFYI(1, ("Linux protocol extensions disabled"));
1982 return;
1983 } else if (vol_info)
1984 tcon->unix_ext = 1; /* Unix Extensions supported */
1985
1986 if (tcon->unix_ext == 0) {
1987 cFYI(1, ("Unix extensions disabled so not set on reconnect"));
1988 return;
1989 }
1990
1991 if (!CIFSSMBQFSUnixInfo(xid, tcon)) {
1992 __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
1993
1994 /* check for reconnect case in which we do not
1995 want to change the mount behavior if we can avoid it */
1996 if (vol_info == NULL) {
1997 /* turn off POSIX ACL and PATHNAMES if not set
1998 originally at mount time */
1999 if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0)
2000 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
2001 if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
2002 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
2003 cERROR(1, ("POSIXPATH support change"));
2004 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
2005 } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
2006 cERROR(1, ("possible reconnect error"));
2007 cERROR(1,
2008 ("server disabled POSIX path support"));
2009 }
2010 }
2011
2012 cap &= CIFS_UNIX_CAP_MASK;
2013 if (vol_info && vol_info->no_psx_acl)
2014 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
2015 else if (CIFS_UNIX_POSIX_ACL_CAP & cap) {
2016 cFYI(1, ("negotiated posix acl support"));
2017 if (sb)
2018 sb->s_flags |= MS_POSIXACL;
2019 }
2020
2021 if (vol_info && vol_info->posix_paths == 0)
2022 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
2023 else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
2024 cFYI(1, ("negotiate posix pathnames"));
2025 if (sb)
2026 CIFS_SB(sb)->mnt_cifs_flags |=
2027 CIFS_MOUNT_POSIX_PATHS;
2028 }
2029
2030 /* We might be setting the path sep back to a different
2031 form if we are reconnecting and the server switched its
2032 posix path capability for this share */
2033 if (sb && (CIFS_SB(sb)->prepathlen > 0))
2034 CIFS_SB(sb)->prepath[0] = CIFS_DIR_SEP(CIFS_SB(sb));
2035
2036 if (sb && (CIFS_SB(sb)->rsize > 127 * 1024)) {
2037 if ((cap & CIFS_UNIX_LARGE_READ_CAP) == 0) {
2038 CIFS_SB(sb)->rsize = 127 * 1024;
2039 cFYI(DBG2,
2040 ("larger reads not supported by srv"));
2041 }
2042 }
2043
2044
2045 cFYI(1, ("Negotiate caps 0x%x", (int)cap));
2046 #ifdef CONFIG_CIFS_DEBUG2
2047 if (cap & CIFS_UNIX_FCNTL_CAP)
2048 cFYI(1, ("FCNTL cap"));
2049 if (cap & CIFS_UNIX_EXTATTR_CAP)
2050 cFYI(1, ("EXTATTR cap"));
2051 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
2052 cFYI(1, ("POSIX path cap"));
2053 if (cap & CIFS_UNIX_XATTR_CAP)
2054 cFYI(1, ("XATTR cap"));
2055 if (cap & CIFS_UNIX_POSIX_ACL_CAP)
2056 cFYI(1, ("POSIX ACL cap"));
2057 if (cap & CIFS_UNIX_LARGE_READ_CAP)
2058 cFYI(1, ("very large read cap"));
2059 if (cap & CIFS_UNIX_LARGE_WRITE_CAP)
2060 cFYI(1, ("very large write cap"));
2061 #endif /* CIFS_DEBUG2 */
2062 if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
2063 if (vol_info == NULL) {
2064 cFYI(1, ("resetting capabilities failed"));
2065 } else
2066 cERROR(1, ("Negotiating Unix capabilities "
2067 "with the server failed. Consider "
2068 "mounting with the Unix Extensions\n"
2069 "disabled, if problems are found, "
2070 "by specifying the nounix mount "
2071 "option."));
2072
2073 }
2074 }
2075 }
2076
2077 static void
2078 convert_delimiter(char *path, char delim)
2079 {
2080 int i;
2081 char old_delim;
2082
2083 if (path == NULL)
2084 return;
2085
2086 if (delim == '/')
2087 old_delim = '\\';
2088 else
2089 old_delim = '/';
2090
2091 for (i = 0; path[i] != '\0'; i++) {
2092 if (path[i] == old_delim)
2093 path[i] = delim;
2094 }
2095 }
2096
2097 static void setup_cifs_sb(struct smb_vol *pvolume_info,
2098 struct cifs_sb_info *cifs_sb)
2099 {
2100 if (pvolume_info->rsize > CIFSMaxBufSize) {
2101 cERROR(1, ("rsize %d too large, using MaxBufSize",
2102 pvolume_info->rsize));
2103 cifs_sb->rsize = CIFSMaxBufSize;
2104 } else if ((pvolume_info->rsize) &&
2105 (pvolume_info->rsize <= CIFSMaxBufSize))
2106 cifs_sb->rsize = pvolume_info->rsize;
2107 else /* default */
2108 cifs_sb->rsize = CIFSMaxBufSize;
2109
2110 if (pvolume_info->wsize > PAGEVEC_SIZE * PAGE_CACHE_SIZE) {
2111 cERROR(1, ("wsize %d too large, using 4096 instead",
2112 pvolume_info->wsize));
2113 cifs_sb->wsize = 4096;
2114 } else if (pvolume_info->wsize)
2115 cifs_sb->wsize = pvolume_info->wsize;
2116 else
2117 cifs_sb->wsize = min_t(const int,
2118 PAGEVEC_SIZE * PAGE_CACHE_SIZE,
2119 127*1024);
2120 /* old default of CIFSMaxBufSize was too small now
2121 that SMB Write2 can send multiple pages in kvec.
2122 RFC1001 does not describe what happens when frame
2123 bigger than 128K is sent so use that as max in
2124 conjunction with 52K kvec constraint on arch with 4K
2125 page size */
2126
2127 if (cifs_sb->rsize < 2048) {
2128 cifs_sb->rsize = 2048;
2129 /* Windows ME may prefer this */
2130 cFYI(1, ("readsize set to minimum: 2048"));
2131 }
2132 /* calculate prepath */
2133 cifs_sb->prepath = pvolume_info->prepath;
2134 if (cifs_sb->prepath) {
2135 cifs_sb->prepathlen = strlen(cifs_sb->prepath);
2136 /* we can not convert the / to \ in the path
2137 separators in the prefixpath yet because we do not
2138 know (until reset_cifs_unix_caps is called later)
2139 whether POSIX PATH CAP is available. We normalize
2140 the / to \ after reset_cifs_unix_caps is called */
2141 pvolume_info->prepath = NULL;
2142 } else
2143 cifs_sb->prepathlen = 0;
2144 cifs_sb->mnt_uid = pvolume_info->linux_uid;
2145 cifs_sb->mnt_gid = pvolume_info->linux_gid;
2146 cifs_sb->mnt_file_mode = pvolume_info->file_mode;
2147 cifs_sb->mnt_dir_mode = pvolume_info->dir_mode;
2148 cFYI(1, ("file mode: 0x%x dir mode: 0x%x",
2149 cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode));
2150
2151 if (pvolume_info->noperm)
2152 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
2153 if (pvolume_info->setuids)
2154 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
2155 if (pvolume_info->server_ino)
2156 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
2157 if (pvolume_info->remap)
2158 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
2159 if (pvolume_info->no_xattr)
2160 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
2161 if (pvolume_info->sfu_emul)
2162 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
2163 if (pvolume_info->nobrl)
2164 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
2165 if (pvolume_info->mand_lock)
2166 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL;
2167 if (pvolume_info->cifs_acl)
2168 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
2169 if (pvolume_info->override_uid)
2170 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID;
2171 if (pvolume_info->override_gid)
2172 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
2173 if (pvolume_info->dynperm)
2174 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM;
2175 if (pvolume_info->direct_io) {
2176 cFYI(1, ("mounting share using direct i/o"));
2177 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
2178 }
2179
2180 if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm))
2181 cERROR(1, ("mount option dynperm ignored if cifsacl "
2182 "mount option supported"));
2183 }
2184
2185 int
2186 cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
2187 char *mount_data, const char *devname)
2188 {
2189 int rc = 0;
2190 int xid;
2191 struct smb_vol *volume_info;
2192 struct cifsSesInfo *pSesInfo = NULL;
2193 struct cifsTconInfo *tcon = NULL;
2194 struct TCP_Server_Info *srvTcp = NULL;
2195
2196 xid = GetXid();
2197
2198 volume_info = kzalloc(sizeof(struct smb_vol), GFP_KERNEL);
2199 if (!volume_info) {
2200 rc = -ENOMEM;
2201 goto out;
2202 }
2203
2204 if (cifs_parse_mount_options(mount_data, devname, volume_info)) {
2205 rc = -EINVAL;
2206 goto out;
2207 }
2208
2209 if (volume_info->nullauth) {
2210 cFYI(1, ("null user"));
2211 volume_info->username = "";
2212 } else if (volume_info->username) {
2213 /* BB fixme parse for domain name here */
2214 cFYI(1, ("Username: %s", volume_info->username));
2215 } else {
2216 cifserror("No username specified");
2217 /* In userspace mount helper we can get user name from alternate
2218 locations such as env variables and files on disk */
2219 rc = -EINVAL;
2220 goto out;
2221 }
2222
2223
2224 /* this is needed for ASCII cp to Unicode converts */
2225 if (volume_info->iocharset == NULL) {
2226 cifs_sb->local_nls = load_nls_default();
2227 /* load_nls_default can not return null */
2228 } else {
2229 cifs_sb->local_nls = load_nls(volume_info->iocharset);
2230 if (cifs_sb->local_nls == NULL) {
2231 cERROR(1, ("CIFS mount error: iocharset %s not found",
2232 volume_info->iocharset));
2233 rc = -ELIBACC;
2234 goto out;
2235 }
2236 }
2237
2238 /* get a reference to a tcp session */
2239 srvTcp = cifs_get_tcp_session(volume_info);
2240 if (IS_ERR(srvTcp)) {
2241 rc = PTR_ERR(srvTcp);
2242 goto out;
2243 }
2244
2245 pSesInfo = cifs_find_smb_ses(srvTcp, volume_info->username);
2246 if (pSesInfo) {
2247 cFYI(1, ("Existing smb sess found (status=%d)",
2248 pSesInfo->status));
2249 /*
2250 * The existing SMB session already has a reference to srvTcp,
2251 * so we can put back the extra one we got before
2252 */
2253 cifs_put_tcp_session(srvTcp);
2254
2255 down(&pSesInfo->sesSem);
2256 if (pSesInfo->need_reconnect) {
2257 cFYI(1, ("Session needs reconnect"));
2258 rc = cifs_setup_session(xid, pSesInfo,
2259 cifs_sb->local_nls);
2260 }
2261 up(&pSesInfo->sesSem);
2262 } else if (!rc) {
2263 cFYI(1, ("Existing smb sess not found"));
2264 pSesInfo = sesInfoAlloc();
2265 if (pSesInfo == NULL) {
2266 rc = -ENOMEM;
2267 goto mount_fail_check;
2268 }
2269
2270 /* new SMB session uses our srvTcp ref */
2271 pSesInfo->server = srvTcp;
2272 if (srvTcp->addr.sockAddr6.sin6_family == AF_INET6)
2273 sprintf(pSesInfo->serverName, "%pI6",
2274 &srvTcp->addr.sockAddr6.sin6_addr);
2275 else
2276 sprintf(pSesInfo->serverName, "%pI4",
2277 &srvTcp->addr.sockAddr.sin_addr.s_addr);
2278
2279 write_lock(&cifs_tcp_ses_lock);
2280 list_add(&pSesInfo->smb_ses_list, &srvTcp->smb_ses_list);
2281 write_unlock(&cifs_tcp_ses_lock);
2282
2283 /* volume_info->password freed at unmount */
2284 if (volume_info->password) {
2285 pSesInfo->password = kstrdup(volume_info->password,
2286 GFP_KERNEL);
2287 if (!pSesInfo->password) {
2288 rc = -ENOMEM;
2289 goto mount_fail_check;
2290 }
2291 }
2292 if (volume_info->username)
2293 strncpy(pSesInfo->userName, volume_info->username,
2294 MAX_USERNAME_SIZE);
2295 if (volume_info->domainname) {
2296 int len = strlen(volume_info->domainname);
2297 pSesInfo->domainName = kmalloc(len + 1, GFP_KERNEL);
2298 if (pSesInfo->domainName)
2299 strcpy(pSesInfo->domainName,
2300 volume_info->domainname);
2301 }
2302 pSesInfo->linux_uid = volume_info->linux_uid;
2303 pSesInfo->overrideSecFlg = volume_info->secFlg;
2304 down(&pSesInfo->sesSem);
2305
2306 /* BB FIXME need to pass vol->secFlgs BB */
2307 rc = cifs_setup_session(xid, pSesInfo,
2308 cifs_sb->local_nls);
2309 up(&pSesInfo->sesSem);
2310 }
2311
2312 /* search for existing tcon to this server share */
2313 if (!rc) {
2314 setup_cifs_sb(volume_info, cifs_sb);
2315
2316 tcon = cifs_find_tcon(pSesInfo, volume_info->UNC);
2317 if (tcon) {
2318 cFYI(1, ("Found match on UNC path"));
2319 /* existing tcon already has a reference */
2320 cifs_put_smb_ses(pSesInfo);
2321 if (tcon->seal != volume_info->seal)
2322 cERROR(1, ("transport encryption setting "
2323 "conflicts with existing tid"));
2324 } else {
2325 tcon = tconInfoAlloc();
2326 if (tcon == NULL) {
2327 rc = -ENOMEM;
2328 goto mount_fail_check;
2329 }
2330
2331 tcon->ses = pSesInfo;
2332 if (volume_info->password) {
2333 tcon->password = kstrdup(volume_info->password,
2334 GFP_KERNEL);
2335 if (!tcon->password) {
2336 rc = -ENOMEM;
2337 goto mount_fail_check;
2338 }
2339 }
2340
2341 /* check for null share name ie connect to dfs root */
2342 if ((strchr(volume_info->UNC + 3, '\\') == NULL)
2343 && (strchr(volume_info->UNC + 3, '/') == NULL)) {
2344 /* rc = connect_to_dfs_path(...) */
2345 cFYI(1, ("DFS root not supported"));
2346 rc = -ENODEV;
2347 goto mount_fail_check;
2348 } else {
2349 /* BB Do we need to wrap sesSem around
2350 * this TCon call and Unix SetFS as
2351 * we do on SessSetup and reconnect? */
2352 rc = CIFSTCon(xid, pSesInfo, volume_info->UNC,
2353 tcon, cifs_sb->local_nls);
2354 cFYI(1, ("CIFS Tcon rc = %d", rc));
2355 if (volume_info->nodfs) {
2356 tcon->Flags &= ~SMB_SHARE_IS_IN_DFS;
2357 cFYI(1, ("DFS disabled (%d)",
2358 tcon->Flags));
2359 }
2360 }
2361 if (rc)
2362 goto mount_fail_check;
2363 tcon->seal = volume_info->seal;
2364 write_lock(&cifs_tcp_ses_lock);
2365 list_add(&tcon->tcon_list, &pSesInfo->tcon_list);
2366 write_unlock(&cifs_tcp_ses_lock);
2367 }
2368
2369 /* we can have only one retry value for a connection
2370 to a share so for resources mounted more than once
2371 to the same server share the last value passed in
2372 for the retry flag is used */
2373 tcon->retry = volume_info->retry;
2374 tcon->nocase = volume_info->nocase;
2375 tcon->local_lease = volume_info->local_lease;
2376 }
2377 if (pSesInfo) {
2378 if (pSesInfo->capabilities & CAP_LARGE_FILES) {
2379 sb->s_maxbytes = (u64) 1 << 63;
2380 } else
2381 sb->s_maxbytes = (u64) 1 << 31; /* 2 GB */
2382 }
2383
2384 /* BB FIXME fix time_gran to be larger for LANMAN sessions */
2385 sb->s_time_gran = 100;
2386
2387 mount_fail_check:
2388 /* on error free sesinfo and tcon struct if needed */
2389 if (rc) {
2390 /* If find_unc succeeded then rc == 0 so we can not end */
2391 /* up accidently freeing someone elses tcon struct */
2392 if (tcon)
2393 cifs_put_tcon(tcon);
2394 else if (pSesInfo)
2395 cifs_put_smb_ses(pSesInfo);
2396 else
2397 cifs_put_tcp_session(srvTcp);
2398 goto out;
2399 }
2400 cifs_sb->tcon = tcon;
2401
2402 /* do not care if following two calls succeed - informational */
2403 if (!tcon->ipc) {
2404 CIFSSMBQFSDeviceInfo(xid, tcon);
2405 CIFSSMBQFSAttributeInfo(xid, tcon);
2406 }
2407
2408 /* tell server which Unix caps we support */
2409 if (tcon->ses->capabilities & CAP_UNIX)
2410 /* reset of caps checks mount to see if unix extensions
2411 disabled for just this mount */
2412 reset_cifs_unix_caps(xid, tcon, sb, volume_info);
2413 else
2414 tcon->unix_ext = 0; /* server does not support them */
2415
2416 /* convert forward to back slashes in prepath here if needed */
2417 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) == 0)
2418 convert_delimiter(cifs_sb->prepath, CIFS_DIR_SEP(cifs_sb));
2419
2420 if ((tcon->unix_ext == 0) && (cifs_sb->rsize > (1024 * 127))) {
2421 cifs_sb->rsize = 1024 * 127;
2422 cFYI(DBG2, ("no very large read support, rsize now 127K"));
2423 }
2424 if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X))
2425 cifs_sb->wsize = min(cifs_sb->wsize,
2426 (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE));
2427 if (!(tcon->ses->capabilities & CAP_LARGE_READ_X))
2428 cifs_sb->rsize = min(cifs_sb->rsize,
2429 (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE));
2430
2431 /* volume_info->password is freed above when existing session found
2432 (in which case it is not needed anymore) but when new sesion is created
2433 the password ptr is put in the new session structure (in which case the
2434 password will be freed at unmount time) */
2435 out:
2436 /* zero out password before freeing */
2437 if (volume_info) {
2438 if (volume_info->password != NULL) {
2439 memset(volume_info->password, 0,
2440 strlen(volume_info->password));
2441 kfree(volume_info->password);
2442 }
2443 kfree(volume_info->UNC);
2444 kfree(volume_info->prepath);
2445 kfree(volume_info);
2446 }
2447 FreeXid(xid);
2448 return rc;
2449 }
2450
2451 static int
2452 CIFSSessSetup(unsigned int xid, struct cifsSesInfo *ses,
2453 char session_key[CIFS_SESS_KEY_SIZE],
2454 const struct nls_table *nls_codepage)
2455 {
2456 struct smb_hdr *smb_buffer;
2457 struct smb_hdr *smb_buffer_response;
2458 SESSION_SETUP_ANDX *pSMB;
2459 SESSION_SETUP_ANDX *pSMBr;
2460 char *bcc_ptr;
2461 char *user;
2462 char *domain;
2463 int rc = 0;
2464 int remaining_words = 0;
2465 int bytes_returned = 0;
2466 int len;
2467 __u32 capabilities;
2468 __u16 count;
2469
2470 cFYI(1, ("In sesssetup"));
2471 if (ses == NULL)
2472 return -EINVAL;
2473 user = ses->userName;
2474 domain = ses->domainName;
2475 smb_buffer = cifs_buf_get();
2476
2477 if (smb_buffer == NULL)
2478 return -ENOMEM;
2479
2480 smb_buffer_response = smb_buffer;
2481 pSMBr = pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2482
2483 /* send SMBsessionSetup here */
2484 header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2485 NULL /* no tCon exists yet */ , 13 /* wct */ );
2486
2487 smb_buffer->Mid = GetNextMid(ses->server);
2488 pSMB->req_no_secext.AndXCommand = 0xFF;
2489 pSMB->req_no_secext.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2490 pSMB->req_no_secext.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2491
2492 if (ses->server->secMode &
2493 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2494 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2495
2496 capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2497 CAP_LARGE_WRITE_X | CAP_LARGE_READ_X;
2498 if (ses->capabilities & CAP_UNICODE) {
2499 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2500 capabilities |= CAP_UNICODE;
2501 }
2502 if (ses->capabilities & CAP_STATUS32) {
2503 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2504 capabilities |= CAP_STATUS32;
2505 }
2506 if (ses->capabilities & CAP_DFS) {
2507 smb_buffer->Flags2 |= SMBFLG2_DFS;
2508 capabilities |= CAP_DFS;
2509 }
2510 pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
2511
2512 pSMB->req_no_secext.CaseInsensitivePasswordLength =
2513 cpu_to_le16(CIFS_SESS_KEY_SIZE);
2514
2515 pSMB->req_no_secext.CaseSensitivePasswordLength =
2516 cpu_to_le16(CIFS_SESS_KEY_SIZE);
2517 bcc_ptr = pByteArea(smb_buffer);
2518 memcpy(bcc_ptr, (char *) session_key, CIFS_SESS_KEY_SIZE);
2519 bcc_ptr += CIFS_SESS_KEY_SIZE;
2520 memcpy(bcc_ptr, (char *) session_key, CIFS_SESS_KEY_SIZE);
2521 bcc_ptr += CIFS_SESS_KEY_SIZE;
2522
2523 if (ses->capabilities & CAP_UNICODE) {
2524 if ((long) bcc_ptr % 2) { /* must be word aligned for Unicode */
2525 *bcc_ptr = 0;
2526 bcc_ptr++;
2527 }
2528 if (user == NULL)
2529 bytes_returned = 0; /* skip null user */
2530 else
2531 bytes_returned =
2532 cifs_strtoUCS((__le16 *) bcc_ptr, user, 100,
2533 nls_codepage);
2534 /* convert number of 16 bit words to bytes */
2535 bcc_ptr += 2 * bytes_returned;
2536 bcc_ptr += 2; /* trailing null */
2537 if (domain == NULL)
2538 bytes_returned =
2539 cifs_strtoUCS((__le16 *) bcc_ptr,
2540 "CIFS_LINUX_DOM", 32, nls_codepage);
2541 else
2542 bytes_returned =
2543 cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
2544 nls_codepage);
2545 bcc_ptr += 2 * bytes_returned;
2546 bcc_ptr += 2;
2547 bytes_returned =
2548 cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2549 32, nls_codepage);
2550 bcc_ptr += 2 * bytes_returned;
2551 bytes_returned =
2552 cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release,
2553 32, nls_codepage);
2554 bcc_ptr += 2 * bytes_returned;
2555 bcc_ptr += 2;
2556 bytes_returned =
2557 cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2558 64, nls_codepage);
2559 bcc_ptr += 2 * bytes_returned;
2560 bcc_ptr += 2;
2561 } else {
2562 if (user != NULL) {
2563 strncpy(bcc_ptr, user, 200);
2564 bcc_ptr += strnlen(user, 200);
2565 }
2566 *bcc_ptr = 0;
2567 bcc_ptr++;
2568 if (domain == NULL) {
2569 strcpy(bcc_ptr, "CIFS_LINUX_DOM");
2570 bcc_ptr += strlen("CIFS_LINUX_DOM") + 1;
2571 } else {
2572 strncpy(bcc_ptr, domain, 64);
2573 bcc_ptr += strnlen(domain, 64);
2574 *bcc_ptr = 0;
2575 bcc_ptr++;
2576 }
2577 strcpy(bcc_ptr, "Linux version ");
2578 bcc_ptr += strlen("Linux version ");
2579 strcpy(bcc_ptr, utsname()->release);
2580 bcc_ptr += strlen(utsname()->release) + 1;
2581 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2582 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2583 }
2584 count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2585 smb_buffer->smb_buf_length += count;
2586 pSMB->req_no_secext.ByteCount = cpu_to_le16(count);
2587
2588 rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
2589 &bytes_returned, CIFS_LONG_OP);
2590 if (rc) {
2591 /* rc = map_smb_to_linux_error(smb_buffer_response); now done in SendReceive */
2592 } else if ((smb_buffer_response->WordCount == 3)
2593 || (smb_buffer_response->WordCount == 4)) {
2594 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2595 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2596 if (action & GUEST_LOGIN)
2597 cFYI(1, ("Guest login")); /* BB mark SesInfo struct? */
2598 ses->Suid = smb_buffer_response->Uid; /* UID left in wire format
2599 (little endian) */
2600 cFYI(1, ("UID = %d ", ses->Suid));
2601 /* response can have either 3 or 4 word count - Samba sends 3 */
2602 bcc_ptr = pByteArea(smb_buffer_response);
2603 if ((pSMBr->resp.hdr.WordCount == 3)
2604 || ((pSMBr->resp.hdr.WordCount == 4)
2605 && (blob_len < pSMBr->resp.ByteCount))) {
2606 if (pSMBr->resp.hdr.WordCount == 4)
2607 bcc_ptr += blob_len;
2608
2609 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2610 if ((long) (bcc_ptr) % 2) {
2611 remaining_words =
2612 (BCC(smb_buffer_response) - 1) / 2;
2613 /* Unicode strings must be word
2614 aligned */
2615 bcc_ptr++;
2616 } else {
2617 remaining_words =
2618 BCC(smb_buffer_response) / 2;
2619 }
2620 len =
2621 UniStrnlen((wchar_t *) bcc_ptr,
2622 remaining_words - 1);
2623 /* We look for obvious messed up bcc or strings in response so we do not go off
2624 the end since (at least) WIN2K and Windows XP have a major bug in not null
2625 terminating last Unicode string in response */
2626 if (ses->serverOS)
2627 kfree(ses->serverOS);
2628 ses->serverOS = kzalloc(2 * (len + 1),
2629 GFP_KERNEL);
2630 if (ses->serverOS == NULL)
2631 goto sesssetup_nomem;
2632 cifs_strfromUCS_le(ses->serverOS,
2633 (__le16 *)bcc_ptr,
2634 len, nls_codepage);
2635 bcc_ptr += 2 * (len + 1);
2636 remaining_words -= len + 1;
2637 ses->serverOS[2 * len] = 0;
2638 ses->serverOS[1 + (2 * len)] = 0;
2639 if (remaining_words > 0) {
2640 len = UniStrnlen((wchar_t *)bcc_ptr,
2641 remaining_words-1);
2642 kfree(ses->serverNOS);
2643 ses->serverNOS = kzalloc(2 * (len + 1),
2644 GFP_KERNEL);
2645 if (ses->serverNOS == NULL)
2646 goto sesssetup_nomem;
2647 cifs_strfromUCS_le(ses->serverNOS,
2648 (__le16 *)bcc_ptr,
2649 len, nls_codepage);
2650 bcc_ptr += 2 * (len + 1);
2651 ses->serverNOS[2 * len] = 0;
2652 ses->serverNOS[1 + (2 * len)] = 0;
2653 if (strncmp(ses->serverNOS,
2654 "NT LAN Manager 4", 16) == 0) {
2655 cFYI(1, ("NT4 server"));
2656 ses->flags |= CIFS_SES_NT4;
2657 }
2658 remaining_words -= len + 1;
2659 if (remaining_words > 0) {
2660 len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
2661 /* last string is not always null terminated
2662 (for e.g. for Windows XP & 2000) */
2663 if (ses->serverDomain)
2664 kfree(ses->serverDomain);
2665 ses->serverDomain =
2666 kzalloc(2*(len+1),
2667 GFP_KERNEL);
2668 if (ses->serverDomain == NULL)
2669 goto sesssetup_nomem;
2670 cifs_strfromUCS_le(ses->serverDomain,
2671 (__le16 *)bcc_ptr,
2672 len, nls_codepage);
2673 bcc_ptr += 2 * (len + 1);
2674 ses->serverDomain[2*len] = 0;
2675 ses->serverDomain[1+(2*len)] = 0;
2676 } else { /* else no more room so create
2677 dummy domain string */
2678 if (ses->serverDomain)
2679 kfree(ses->serverDomain);
2680 ses->serverDomain =
2681 kzalloc(2, GFP_KERNEL);
2682 }
2683 } else { /* no room so create dummy domain
2684 and NOS string */
2685
2686 /* if these kcallocs fail not much we
2687 can do, but better to not fail the
2688 sesssetup itself */
2689 kfree(ses->serverDomain);
2690 ses->serverDomain =
2691 kzalloc(2, GFP_KERNEL);
2692 kfree(ses->serverNOS);
2693 ses->serverNOS =
2694 kzalloc(2, GFP_KERNEL);
2695 }
2696 } else { /* ASCII */
2697 len = strnlen(bcc_ptr, 1024);
2698 if (((long) bcc_ptr + len) - (long)
2699 pByteArea(smb_buffer_response)
2700 <= BCC(smb_buffer_response)) {
2701 kfree(ses->serverOS);
2702 ses->serverOS = kzalloc(len + 1,
2703 GFP_KERNEL);
2704 if (ses->serverOS == NULL)
2705 goto sesssetup_nomem;
2706 strncpy(ses->serverOS, bcc_ptr, len);
2707
2708 bcc_ptr += len;
2709 /* null terminate the string */
2710 bcc_ptr[0] = 0;
2711 bcc_ptr++;
2712
2713 len = strnlen(bcc_ptr, 1024);
2714 kfree(ses->serverNOS);
2715 ses->serverNOS = kzalloc(len + 1,
2716 GFP_KERNEL);
2717 if (ses->serverNOS == NULL)
2718 goto sesssetup_nomem;
2719 strncpy(ses->serverNOS, bcc_ptr, len);
2720 bcc_ptr += len;
2721 bcc_ptr[0] = 0;
2722 bcc_ptr++;
2723
2724 len = strnlen(bcc_ptr, 1024);
2725 if (ses->serverDomain)
2726 kfree(ses->serverDomain);
2727 ses->serverDomain = kzalloc(len + 1,
2728 GFP_KERNEL);
2729 if (ses->serverDomain == NULL)
2730 goto sesssetup_nomem;
2731 strncpy(ses->serverDomain, bcc_ptr,
2732 len);
2733 bcc_ptr += len;
2734 bcc_ptr[0] = 0;
2735 bcc_ptr++;
2736 } else
2737 cFYI(1,
2738 ("Variable field of length %d "
2739 "extends beyond end of smb ",
2740 len));
2741 }
2742 } else {
2743 cERROR(1, ("Security Blob Length extends beyond "
2744 "end of SMB"));
2745 }
2746 } else {
2747 cERROR(1, ("Invalid Word count %d: ",
2748 smb_buffer_response->WordCount));
2749 rc = -EIO;
2750 }
2751 sesssetup_nomem: /* do not return an error on nomem for the info strings,
2752 since that could make reconnection harder, and
2753 reconnection might be needed to free memory */
2754 cifs_buf_release(smb_buffer);
2755
2756 return rc;
2757 }
2758
2759 static int
2760 CIFSNTLMSSPNegotiateSessSetup(unsigned int xid,
2761 struct cifsSesInfo *ses, bool *pNTLMv2_flag,
2762 const struct nls_table *nls_codepage)
2763 {
2764 struct smb_hdr *smb_buffer;
2765 struct smb_hdr *smb_buffer_response;
2766 SESSION_SETUP_ANDX *pSMB;
2767 SESSION_SETUP_ANDX *pSMBr;
2768 char *bcc_ptr;
2769 char *domain;
2770 int rc = 0;
2771 int remaining_words = 0;
2772 int bytes_returned = 0;
2773 int len;
2774 int SecurityBlobLength = sizeof(NEGOTIATE_MESSAGE);
2775 PNEGOTIATE_MESSAGE SecurityBlob;
2776 PCHALLENGE_MESSAGE SecurityBlob2;
2777 __u32 negotiate_flags, capabilities;
2778 __u16 count;
2779
2780 cFYI(1, ("In NTLMSSP sesssetup (negotiate)"));
2781 if (ses == NULL)
2782 return -EINVAL;
2783 domain = ses->domainName;
2784 *pNTLMv2_flag = false;
2785 smb_buffer = cifs_buf_get();
2786 if (smb_buffer == NULL) {
2787 return -ENOMEM;
2788 }
2789 smb_buffer_response = smb_buffer;
2790 pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2791 pSMBr = (SESSION_SETUP_ANDX *) smb_buffer_response;
2792
2793 /* send SMBsessionSetup here */
2794 header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2795 NULL /* no tCon exists yet */ , 12 /* wct */ );
2796
2797 smb_buffer->Mid = GetNextMid(ses->server);
2798 pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
2799 pSMB->req.hdr.Flags |= (SMBFLG_CASELESS | SMBFLG_CANONICAL_PATH_FORMAT);
2800
2801 pSMB->req.AndXCommand = 0xFF;
2802 pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2803 pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2804
2805 if (ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2806 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2807
2808 capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2809 CAP_EXTENDED_SECURITY;
2810 if (ses->capabilities & CAP_UNICODE) {
2811 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2812 capabilities |= CAP_UNICODE;
2813 }
2814 if (ses->capabilities & CAP_STATUS32) {
2815 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2816 capabilities |= CAP_STATUS32;
2817 }
2818 if (ses->capabilities & CAP_DFS) {
2819 smb_buffer->Flags2 |= SMBFLG2_DFS;
2820 capabilities |= CAP_DFS;
2821 }
2822 pSMB->req.Capabilities = cpu_to_le32(capabilities);
2823
2824 bcc_ptr = (char *) &pSMB->req.SecurityBlob;
2825 SecurityBlob = (PNEGOTIATE_MESSAGE) bcc_ptr;
2826 strncpy(SecurityBlob->Signature, NTLMSSP_SIGNATURE, 8);
2827 SecurityBlob->MessageType = NtLmNegotiate;
2828 negotiate_flags =
2829 NTLMSSP_NEGOTIATE_UNICODE | NTLMSSP_NEGOTIATE_OEM |
2830 NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_NTLM |
2831 NTLMSSP_NEGOTIATE_56 |
2832 /* NTLMSSP_NEGOTIATE_ALWAYS_SIGN | */ NTLMSSP_NEGOTIATE_128;
2833 if (sign_CIFS_PDUs)
2834 negotiate_flags |= NTLMSSP_NEGOTIATE_SIGN;
2835 /* if (ntlmv2_support)
2836 negotiate_flags |= NTLMSSP_NEGOTIATE_NTLMV2;*/
2837 /* setup pointers to domain name and workstation name */
2838 bcc_ptr += SecurityBlobLength;
2839
2840 SecurityBlob->WorkstationName.Buffer = 0;
2841 SecurityBlob->WorkstationName.Length = 0;
2842 SecurityBlob->WorkstationName.MaximumLength = 0;
2843
2844 /* Domain not sent on first Sesssetup in NTLMSSP, instead it is sent
2845 along with username on auth request (ie the response to challenge) */
2846 SecurityBlob->DomainName.Buffer = 0;
2847 SecurityBlob->DomainName.Length = 0;
2848 SecurityBlob->DomainName.MaximumLength = 0;
2849 if (ses->capabilities & CAP_UNICODE) {
2850 if ((long) bcc_ptr % 2) {
2851 *bcc_ptr = 0;
2852 bcc_ptr++;
2853 }
2854
2855 bytes_returned =
2856 cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2857 32, nls_codepage);
2858 bcc_ptr += 2 * bytes_returned;
2859 bytes_returned =
2860 cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release, 32,
2861 nls_codepage);
2862 bcc_ptr += 2 * bytes_returned;
2863 bcc_ptr += 2; /* null terminate Linux version */
2864 bytes_returned =
2865 cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2866 64, nls_codepage);
2867 bcc_ptr += 2 * bytes_returned;
2868 *(bcc_ptr + 1) = 0;
2869 *(bcc_ptr + 2) = 0;
2870 bcc_ptr += 2; /* null terminate network opsys string */
2871 *(bcc_ptr + 1) = 0;
2872 *(bcc_ptr + 2) = 0;
2873 bcc_ptr += 2; /* null domain */
2874 } else { /* ASCII */
2875 strcpy(bcc_ptr, "Linux version ");
2876 bcc_ptr += strlen("Linux version ");
2877 strcpy(bcc_ptr, utsname()->release);
2878 bcc_ptr += strlen(utsname()->release) + 1;
2879 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2880 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2881 bcc_ptr++; /* empty domain field */
2882 *bcc_ptr = 0;
2883 }
2884 SecurityBlob->NegotiateFlags = cpu_to_le32(negotiate_flags);
2885 pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
2886 count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2887 smb_buffer->smb_buf_length += count;
2888 pSMB->req.ByteCount = cpu_to_le16(count);
2889
2890 rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
2891 &bytes_returned, CIFS_LONG_OP);
2892
2893 if (smb_buffer_response->Status.CifsError ==
2894 cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED))
2895 rc = 0;
2896
2897 if (rc) {
2898 /* rc = map_smb_to_linux_error(smb_buffer_response); *//* done in SendReceive now */
2899 } else if ((smb_buffer_response->WordCount == 3)
2900 || (smb_buffer_response->WordCount == 4)) {
2901 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2902 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2903
2904 if (action & GUEST_LOGIN)
2905 cFYI(1, ("Guest login"));
2906 /* Do we want to set anything in SesInfo struct when guest login? */
2907
2908 bcc_ptr = pByteArea(smb_buffer_response);
2909 /* response can have either 3 or 4 word count - Samba sends 3 */
2910
2911 SecurityBlob2 = (PCHALLENGE_MESSAGE) bcc_ptr;
2912 if (SecurityBlob2->MessageType != NtLmChallenge) {
2913 cFYI(1, ("Unexpected NTLMSSP message type received %d",
2914 SecurityBlob2->MessageType));
2915 } else if (ses) {
2916 ses->Suid = smb_buffer_response->Uid; /* UID left in le format */
2917 cFYI(1, ("UID = %d", ses->Suid));
2918 if ((pSMBr->resp.hdr.WordCount == 3)
2919 || ((pSMBr->resp.hdr.WordCount == 4)
2920 && (blob_len <
2921 pSMBr->resp.ByteCount))) {
2922
2923 if (pSMBr->resp.hdr.WordCount == 4) {
2924 bcc_ptr += blob_len;
2925 cFYI(1, ("Security Blob Length %d",
2926 blob_len));
2927 }
2928
2929 cFYI(1, ("NTLMSSP Challenge rcvd"));
2930
2931 memcpy(ses->server->cryptKey,
2932 SecurityBlob2->Challenge,
2933 CIFS_CRYPTO_KEY_SIZE);
2934 if (SecurityBlob2->NegotiateFlags &
2935 cpu_to_le32(NTLMSSP_NEGOTIATE_NTLMV2))
2936 *pNTLMv2_flag = true;
2937
2938 if ((SecurityBlob2->NegotiateFlags &
2939 cpu_to_le32(NTLMSSP_NEGOTIATE_ALWAYS_SIGN))
2940 || (sign_CIFS_PDUs > 1))
2941 ses->server->secMode |=
2942 SECMODE_SIGN_REQUIRED;
2943 if ((SecurityBlob2->NegotiateFlags &
2944 cpu_to_le32(NTLMSSP_NEGOTIATE_SIGN)) && (sign_CIFS_PDUs))
2945 ses->server->secMode |=
2946 SECMODE_SIGN_ENABLED;
2947
2948 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2949 if ((long) (bcc_ptr) % 2) {
2950 remaining_words =
2951 (BCC(smb_buffer_response)
2952 - 1) / 2;
2953 /* Must word align unicode strings */
2954 bcc_ptr++;
2955 } else {
2956 remaining_words =
2957 BCC
2958 (smb_buffer_response) / 2;
2959 }
2960 len =
2961 UniStrnlen((wchar_t *) bcc_ptr,
2962 remaining_words - 1);
2963 /* We look for obvious messed up bcc or strings in response so we do not go off
2964 the end since (at least) WIN2K and Windows XP have a major bug in not null
2965 terminating last Unicode string in response */
2966 if (ses->serverOS)
2967 kfree(ses->serverOS);
2968 ses->serverOS =
2969 kzalloc(2 * (len + 1), GFP_KERNEL);
2970 cifs_strfromUCS_le(ses->serverOS,
2971 (__le16 *)
2972 bcc_ptr, len,
2973 nls_codepage);
2974 bcc_ptr += 2 * (len + 1);
2975 remaining_words -= len + 1;
2976 ses->serverOS[2 * len] = 0;
2977 ses->serverOS[1 + (2 * len)] = 0;
2978 if (remaining_words > 0) {
2979 len = UniStrnlen((wchar_t *)
2980 bcc_ptr,
2981 remaining_words
2982 - 1);
2983 kfree(ses->serverNOS);
2984 ses->serverNOS =
2985 kzalloc(2 * (len + 1),
2986 GFP_KERNEL);
2987 cifs_strfromUCS_le(ses->
2988 serverNOS,
2989 (__le16 *)
2990 bcc_ptr,
2991 len,
2992 nls_codepage);
2993 bcc_ptr += 2 * (len + 1);
2994 ses->serverNOS[2 * len] = 0;
2995 ses->serverNOS[1 +
2996 (2 * len)] = 0;
2997 remaining_words -= len + 1;
2998 if (remaining_words > 0) {
2999 len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
3000 /* last string not always null terminated
3001 (for e.g. for Windows XP & 2000) */
3002 kfree(ses->serverDomain);
3003 ses->serverDomain =
3004 kzalloc(2 *
3005 (len +
3006 1),
3007 GFP_KERNEL);
3008 cifs_strfromUCS_le
3009 (ses->serverDomain,
3010 (__le16 *)bcc_ptr,
3011 len, nls_codepage);
3012 bcc_ptr +=
3013 2 * (len + 1);
3014 ses->serverDomain[2*len]
3015 = 0;
3016 ses->serverDomain
3017 [1 + (2 * len)]
3018 = 0;
3019 } /* else no more room so create dummy domain string */
3020 else {
3021 kfree(ses->serverDomain);
3022 ses->serverDomain =
3023 kzalloc(2,
3024 GFP_KERNEL);
3025 }
3026 } else { /* no room so create dummy domain and NOS string */
3027 kfree(ses->serverDomain);
3028 ses->serverDomain =
3029 kzalloc(2, GFP_KERNEL);
3030 kfree(ses->serverNOS);
3031 ses->serverNOS =
3032 kzalloc(2, GFP_KERNEL);
3033 }
3034 } else { /* ASCII */
3035 len = strnlen(bcc_ptr, 1024);
3036 if (((long) bcc_ptr + len) - (long)
3037 pByteArea(smb_buffer_response)
3038 <= BCC(smb_buffer_response)) {
3039 if (ses->serverOS)
3040 kfree(ses->serverOS);
3041 ses->serverOS =
3042 kzalloc(len + 1,
3043 GFP_KERNEL);
3044 strncpy(ses->serverOS,
3045 bcc_ptr, len);
3046
3047 bcc_ptr += len;
3048 bcc_ptr[0] = 0; /* null terminate string */
3049 bcc_ptr++;
3050
3051 len = strnlen(bcc_ptr, 1024);
3052 kfree(ses->serverNOS);
3053 ses->serverNOS =
3054 kzalloc(len + 1,
3055 GFP_KERNEL);
3056 strncpy(ses->serverNOS, bcc_ptr, len);
3057 bcc_ptr += len;
3058 bcc_ptr[0] = 0;
3059 bcc_ptr++;
3060
3061 len = strnlen(bcc_ptr, 1024);
3062 kfree(ses->serverDomain);
3063 ses->serverDomain =
3064 kzalloc(len + 1,
3065 GFP_KERNEL);
3066 strncpy(ses->serverDomain,
3067 bcc_ptr, len);
3068 bcc_ptr += len;
3069 bcc_ptr[0] = 0;
3070 bcc_ptr++;
3071 } else
3072 cFYI(1,
3073 ("field of length %d "
3074 "extends beyond end of smb",
3075 len));
3076 }
3077 } else {
3078 cERROR(1, ("Security Blob Length extends beyond"
3079 " end of SMB"));
3080 }
3081 } else {
3082 cERROR(1, ("No session structure passed in."));
3083 }
3084 } else {
3085 cERROR(1, ("Invalid Word count %d:",
3086 smb_buffer_response->WordCount));
3087 rc = -EIO;
3088 }
3089
3090 cifs_buf_release(smb_buffer);
3091
3092 return rc;
3093 }
3094 static int
3095 CIFSNTLMSSPAuthSessSetup(unsigned int xid, struct cifsSesInfo *ses,
3096 char *ntlm_session_key, bool ntlmv2_flag,
3097 const struct nls_table *nls_codepage)
3098 {
3099 struct smb_hdr *smb_buffer;
3100 struct smb_hdr *smb_buffer_response;
3101 SESSION_SETUP_ANDX *pSMB;
3102 SESSION_SETUP_ANDX *pSMBr;
3103 char *bcc_ptr;
3104 char *user;
3105 char *domain;
3106 int rc = 0;
3107 int remaining_words = 0;
3108 int bytes_returned = 0;
3109 int len;
3110 int SecurityBlobLength = sizeof(AUTHENTICATE_MESSAGE);
3111 PAUTHENTICATE_MESSAGE SecurityBlob;
3112 __u32 negotiate_flags, capabilities;
3113 __u16 count;
3114
3115 cFYI(1, ("In NTLMSSPSessSetup (Authenticate)"));
3116 if (ses == NULL)
3117 return -EINVAL;
3118 user = ses->userName;
3119 domain = ses->domainName;
3120 smb_buffer = cifs_buf_get();
3121 if (smb_buffer == NULL) {
3122 return -ENOMEM;
3123 }
3124 smb_buffer_response = smb_buffer;
3125 pSMB = (SESSION_SETUP_ANDX *)smb_buffer;
3126 pSMBr = (SESSION_SETUP_ANDX *)smb_buffer_response;
3127
3128 /* send SMBsessionSetup here */
3129 header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
3130 NULL /* no tCon exists yet */ , 12 /* wct */ );
3131
3132 smb_buffer->Mid = GetNextMid(ses->server);
3133 pSMB->req.hdr.Flags |= (SMBFLG_CASELESS | SMBFLG_CANONICAL_PATH_FORMAT);
3134 pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
3135 pSMB->req.AndXCommand = 0xFF;
3136 pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
3137 pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
3138
3139 pSMB->req.hdr.Uid = ses->Suid;
3140
3141 if (ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
3142 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
3143
3144 capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
3145 CAP_EXTENDED_SECURITY;
3146 if (ses->capabilities & CAP_UNICODE) {
3147 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
3148 capabilities |= CAP_UNICODE;
3149 }
3150 if (ses->capabilities & CAP_STATUS32) {
3151 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
3152 capabilities |= CAP_STATUS32;
3153 }
3154 if (ses->capabilities & CAP_DFS) {
3155 smb_buffer->Flags2 |= SMBFLG2_DFS;
3156 capabilities |= CAP_DFS;
3157 }
3158 pSMB->req.Capabilities = cpu_to_le32(capabilities);
3159
3160 bcc_ptr = (char *)&pSMB->req.SecurityBlob;
3161 SecurityBlob = (PAUTHENTICATE_MESSAGE)bcc_ptr;
3162 strncpy(SecurityBlob->Signature, NTLMSSP_SIGNATURE, 8);
3163 SecurityBlob->MessageType = NtLmAuthenticate;
3164 bcc_ptr += SecurityBlobLength;
3165 negotiate_flags = NTLMSSP_NEGOTIATE_UNICODE | NTLMSSP_REQUEST_TARGET |
3166 NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_TARGET_INFO |
3167 0x80000000 | NTLMSSP_NEGOTIATE_128;
3168 if (sign_CIFS_PDUs)
3169 negotiate_flags |= /* NTLMSSP_NEGOTIATE_ALWAYS_SIGN |*/ NTLMSSP_NEGOTIATE_SIGN;
3170 if (ntlmv2_flag)
3171 negotiate_flags |= NTLMSSP_NEGOTIATE_NTLMV2;
3172
3173 /* setup pointers to domain name and workstation name */
3174
3175 SecurityBlob->WorkstationName.Buffer = 0;
3176 SecurityBlob->WorkstationName.Length = 0;
3177 SecurityBlob->WorkstationName.MaximumLength = 0;
3178 SecurityBlob->SessionKey.Length = 0;
3179 SecurityBlob->SessionKey.MaximumLength = 0;
3180 SecurityBlob->SessionKey.Buffer = 0;
3181
3182 SecurityBlob->LmChallengeResponse.Length = 0;
3183 SecurityBlob->LmChallengeResponse.MaximumLength = 0;
3184 SecurityBlob->LmChallengeResponse.Buffer = 0;
3185
3186 SecurityBlob->NtChallengeResponse.Length =
3187 cpu_to_le16(CIFS_SESS_KEY_SIZE);
3188 SecurityBlob->NtChallengeResponse.MaximumLength =
3189 cpu_to_le16(CIFS_SESS_KEY_SIZE);
3190 memcpy(bcc_ptr, ntlm_session_key, CIFS_SESS_KEY_SIZE);
3191 SecurityBlob->NtChallengeResponse.Buffer =
3192 cpu_to_le32(SecurityBlobLength);
3193 SecurityBlobLength += CIFS_SESS_KEY_SIZE;
3194 bcc_ptr += CIFS_SESS_KEY_SIZE;
3195
3196 if (ses->capabilities & CAP_UNICODE) {
3197 if (domain == NULL) {
3198 SecurityBlob->DomainName.Buffer = 0;
3199 SecurityBlob->DomainName.Length = 0;
3200 SecurityBlob->DomainName.MaximumLength = 0;
3201 } else {
3202 __u16 ln = cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
3203 nls_codepage);
3204 ln *= 2;
3205 SecurityBlob->DomainName.MaximumLength =
3206 cpu_to_le16(ln);
3207 SecurityBlob->DomainName.Buffer =
3208 cpu_to_le32(SecurityBlobLength);
3209 bcc_ptr += ln;
3210 SecurityBlobLength += ln;
3211 SecurityBlob->DomainName.Length = cpu_to_le16(ln);
3212 }
3213 if (user == NULL) {
3214 SecurityBlob->UserName.Buffer = 0;
3215 SecurityBlob->UserName.Length = 0;
3216 SecurityBlob->UserName.MaximumLength = 0;
3217 } else {
3218 __u16 ln = cifs_strtoUCS((__le16 *) bcc_ptr, user, 64,
3219 nls_codepage);
3220 ln *= 2;
3221 SecurityBlob->UserName.MaximumLength =
3222 cpu_to_le16(ln);
3223 SecurityBlob->UserName.Buffer =
3224 cpu_to_le32(SecurityBlobLength);
3225 bcc_ptr += ln;
3226 SecurityBlobLength += ln;
3227 SecurityBlob->UserName.Length = cpu_to_le16(ln);
3228 }
3229
3230 /* SecurityBlob->WorkstationName.Length =
3231 cifs_strtoUCS((__le16 *) bcc_ptr, "AMACHINE",64, nls_codepage);
3232 SecurityBlob->WorkstationName.Length *= 2;
3233 SecurityBlob->WorkstationName.MaximumLength =
3234 cpu_to_le16(SecurityBlob->WorkstationName.Length);
3235 SecurityBlob->WorkstationName.Buffer =
3236 cpu_to_le32(SecurityBlobLength);
3237 bcc_ptr += SecurityBlob->WorkstationName.Length;
3238 SecurityBlobLength += SecurityBlob->WorkstationName.Length;
3239 SecurityBlob->WorkstationName.Length =
3240 cpu_to_le16(SecurityBlob->WorkstationName.Length); */
3241
3242 if ((long) bcc_ptr % 2) {
3243 *bcc_ptr = 0;
3244 bcc_ptr++;
3245 }
3246 bytes_returned =
3247 cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
3248 32, nls_codepage);
3249 bcc_ptr += 2 * bytes_returned;
3250 bytes_returned =
3251 cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release, 32,
3252 nls_codepage);
3253 bcc_ptr += 2 * bytes_returned;
3254 bcc_ptr += 2; /* null term version string */
3255 bytes_returned =
3256 cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
3257 64, nls_codepage);
3258 bcc_ptr += 2 * bytes_returned;
3259 *(bcc_ptr + 1) = 0;
3260 *(bcc_ptr + 2) = 0;
3261 bcc_ptr += 2; /* null terminate network opsys string */
3262 *(bcc_ptr + 1) = 0;
3263 *(bcc_ptr + 2) = 0;
3264 bcc_ptr += 2; /* null domain */
3265 } else { /* ASCII */
3266 if (domain == NULL) {
3267 SecurityBlob->DomainName.Buffer = 0;
3268 SecurityBlob->DomainName.Length = 0;
3269 SecurityBlob->DomainName.MaximumLength = 0;
3270 } else {
3271 __u16 ln;
3272 negotiate_flags |= NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED;
3273 strncpy(bcc_ptr, domain, 63);
3274 ln = strnlen(domain, 64);
3275 SecurityBlob->DomainName.MaximumLength =
3276 cpu_to_le16(ln);
3277 SecurityBlob->DomainName.Buffer =
3278 cpu_to_le32(SecurityBlobLength);
3279 bcc_ptr += ln;
3280 SecurityBlobLength += ln;
3281 SecurityBlob->DomainName.Length = cpu_to_le16(ln);
3282 }
3283 if (user == NULL) {
3284 SecurityBlob->UserName.Buffer = 0;
3285 SecurityBlob->UserName.Length = 0;
3286 SecurityBlob->UserName.MaximumLength = 0;
3287 } else {
3288 __u16 ln;
3289 strncpy(bcc_ptr, user, 63);
3290 ln = strnlen(user, 64);
3291 SecurityBlob->UserName.MaximumLength = cpu_to_le16(ln);
3292 SecurityBlob->UserName.Buffer =
3293 cpu_to_le32(SecurityBlobLength);
3294 bcc_ptr += ln;
3295 SecurityBlobLength += ln;
3296 SecurityBlob->UserName.Length = cpu_to_le16(ln);
3297 }
3298 /* BB fill in our workstation name if known BB */
3299
3300 strcpy(bcc_ptr, "Linux version ");
3301 bcc_ptr += strlen("Linux version ");
3302 strcpy(bcc_ptr, utsname()->release);
3303 bcc_ptr += strlen(utsname()->release) + 1;
3304 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
3305 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
3306 bcc_ptr++; /* null domain */
3307 *bcc_ptr = 0;
3308 }
3309 SecurityBlob->NegotiateFlags = cpu_to_le32(negotiate_flags);
3310 pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
3311 count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
3312 smb_buffer->smb_buf_length += count;
3313 pSMB->req.ByteCount = cpu_to_le16(count);
3314
3315 rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
3316 &bytes_returned, CIFS_LONG_OP);
3317 if (rc) {
3318 /* rc = map_smb_to_linux_error(smb_buffer_response) done in SendReceive now */
3319 } else if ((smb_buffer_response->WordCount == 3) ||
3320 (smb_buffer_response->WordCount == 4)) {
3321 __u16 action = le16_to_cpu(pSMBr->resp.Action);
3322 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
3323 if (action & GUEST_LOGIN)
3324 cFYI(1, ("Guest login")); /* BB Should we set anything
3325 in SesInfo struct ? */
3326 /* if (SecurityBlob2->MessageType != NtLm??) {
3327 cFYI("Unexpected message type on auth response is %d"));
3328 } */
3329
3330 if (ses) {
3331 cFYI(1,
3332 ("Check challenge UID %d vs auth response UID %d",
3333 ses->Suid, smb_buffer_response->Uid));
3334 /* UID left in wire format */
3335 ses->Suid = smb_buffer_response->Uid;
3336 bcc_ptr = pByteArea(smb_buffer_response);
3337 /* response can have either 3 or 4 word count - Samba sends 3 */
3338 if ((pSMBr->resp.hdr.WordCount == 3)
3339 || ((pSMBr->resp.hdr.WordCount == 4)
3340 && (blob_len <
3341 pSMBr->resp.ByteCount))) {
3342 if (pSMBr->resp.hdr.WordCount == 4) {
3343 bcc_ptr +=
3344 blob_len;
3345 cFYI(1,
3346 ("Security Blob Length %d ",
3347 blob_len));
3348 }
3349
3350 cFYI(1,
3351 ("NTLMSSP response to Authenticate "));
3352
3353 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
3354 if ((long) (bcc_ptr) % 2) {
3355 remaining_words =
3356 (BCC(smb_buffer_response)
3357 - 1) / 2;
3358 bcc_ptr++; /* Unicode strings must be word aligned */
3359 } else {
3360 remaining_words = BCC(smb_buffer_response) / 2;
3361 }
3362 len = UniStrnlen((wchar_t *) bcc_ptr,
3363 remaining_words - 1);
3364 /* We look for obvious messed up bcc or strings in response so we do not go off
3365 the end since (at least) WIN2K and Windows XP have a major bug in not null
3366 terminating last Unicode string in response */
3367 if (ses->serverOS)
3368 kfree(ses->serverOS);
3369 ses->serverOS =
3370 kzalloc(2 * (len + 1), GFP_KERNEL);
3371 cifs_strfromUCS_le(ses->serverOS,
3372 (__le16 *)
3373 bcc_ptr, len,
3374 nls_codepage);
3375 bcc_ptr += 2 * (len + 1);
3376 remaining_words -= len + 1;
3377 ses->serverOS[2 * len] = 0;
3378 ses->serverOS[1 + (2 * len)] = 0;
3379 if (remaining_words > 0) {
3380 len = UniStrnlen((wchar_t *)
3381 bcc_ptr,
3382 remaining_words
3383 - 1);
3384 kfree(ses->serverNOS);
3385 ses->serverNOS =
3386 kzalloc(2 * (len + 1),
3387 GFP_KERNEL);
3388 cifs_strfromUCS_le(ses->
3389 serverNOS,
3390 (__le16 *)
3391 bcc_ptr,
3392 len,
3393 nls_codepage);
3394 bcc_ptr += 2 * (len + 1);
3395 ses->serverNOS[2 * len] = 0;
3396 ses->serverNOS[1+(2*len)] = 0;
3397 remaining_words -= len + 1;
3398 if (remaining_words > 0) {
3399 len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
3400 /* last string not always null terminated (e.g. for Windows XP & 2000) */
3401 if (ses->serverDomain)
3402 kfree(ses->serverDomain);
3403 ses->serverDomain =
3404 kzalloc(2 *
3405 (len +
3406 1),
3407 GFP_KERNEL);
3408 cifs_strfromUCS_le
3409 (ses->
3410 serverDomain,
3411 (__le16 *)
3412 bcc_ptr, len,
3413 nls_codepage);
3414 bcc_ptr +=
3415 2 * (len + 1);
3416 ses->
3417 serverDomain[2
3418 * len]
3419 = 0;
3420 ses->
3421 serverDomain[1
3422 +
3423 (2
3424 *
3425 len)]
3426 = 0;
3427 } /* else no more room so create dummy domain string */
3428 else {
3429 if (ses->serverDomain)
3430 kfree(ses->serverDomain);
3431 ses->serverDomain = kzalloc(2,GFP_KERNEL);
3432 }
3433 } else { /* no room so create dummy domain and NOS string */
3434 if (ses->serverDomain)
3435 kfree(ses->serverDomain);
3436 ses->serverDomain = kzalloc(2, GFP_KERNEL);
3437 kfree(ses->serverNOS);
3438 ses->serverNOS = kzalloc(2, GFP_KERNEL);
3439 }
3440 } else { /* ASCII */
3441 len = strnlen(bcc_ptr, 1024);
3442 if (((long) bcc_ptr + len) -
3443 (long) pByteArea(smb_buffer_response)
3444 <= BCC(smb_buffer_response)) {
3445 if (ses->serverOS)
3446 kfree(ses->serverOS);
3447 ses->serverOS = kzalloc(len + 1, GFP_KERNEL);
3448 strncpy(ses->serverOS,bcc_ptr, len);
3449
3450 bcc_ptr += len;
3451 bcc_ptr[0] = 0; /* null terminate the string */
3452 bcc_ptr++;
3453
3454 len = strnlen(bcc_ptr, 1024);
3455 kfree(ses->serverNOS);
3456 ses->serverNOS = kzalloc(len+1,
3457 GFP_KERNEL);
3458 strncpy(ses->serverNOS,
3459 bcc_ptr, len);
3460 bcc_ptr += len;
3461 bcc_ptr[0] = 0;
3462 bcc_ptr++;
3463
3464 len = strnlen(bcc_ptr, 1024);
3465 if (ses->serverDomain)
3466 kfree(ses->serverDomain);
3467 ses->serverDomain =
3468 kzalloc(len+1,
3469 GFP_KERNEL);
3470 strncpy(ses->serverDomain,
3471 bcc_ptr, len);
3472 bcc_ptr += len;
3473 bcc_ptr[0] = 0;
3474 bcc_ptr++;
3475 } else
3476 cFYI(1, ("field of length %d "
3477 "extends beyond end of smb ",
3478 len));
3479 }
3480 } else {
3481 cERROR(1, ("Security Blob extends beyond end "
3482 "of SMB"));
3483 }
3484 } else {
3485 cERROR(1, ("No session structure passed in."));
3486 }
3487 } else {
3488 cERROR(1, ("Invalid Word count %d: ",
3489 smb_buffer_response->WordCount));
3490 rc = -EIO;
3491 }
3492
3493 cifs_buf_release(smb_buffer);
3494
3495 return rc;
3496 }
3497
3498 int
3499 CIFSTCon(unsigned int xid, struct cifsSesInfo *ses,
3500 const char *tree, struct cifsTconInfo *tcon,
3501 const struct nls_table *nls_codepage)
3502 {
3503 struct smb_hdr *smb_buffer;
3504 struct smb_hdr *smb_buffer_response;
3505 TCONX_REQ *pSMB;
3506 TCONX_RSP *pSMBr;
3507 unsigned char *bcc_ptr;
3508 int rc = 0;
3509 int length;
3510 __u16 count;
3511
3512 if (ses == NULL)
3513 return -EIO;
3514
3515 smb_buffer = cifs_buf_get();
3516 if (smb_buffer == NULL) {
3517 return -ENOMEM;
3518 }
3519 smb_buffer_response = smb_buffer;
3520
3521 header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX,
3522 NULL /*no tid */ , 4 /*wct */ );
3523
3524 smb_buffer->Mid = GetNextMid(ses->server);
3525 smb_buffer->Uid = ses->Suid;
3526 pSMB = (TCONX_REQ *) smb_buffer;
3527 pSMBr = (TCONX_RSP *) smb_buffer_response;
3528
3529 pSMB->AndXCommand = 0xFF;
3530 pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO);
3531 bcc_ptr = &pSMB->Password[0];
3532 if ((ses->server->secMode) & SECMODE_USER) {
3533 pSMB->PasswordLength = cpu_to_le16(1); /* minimum */
3534 *bcc_ptr = 0; /* password is null byte */
3535 bcc_ptr++; /* skip password */
3536 /* already aligned so no need to do it below */
3537 } else {
3538 pSMB->PasswordLength = cpu_to_le16(CIFS_SESS_KEY_SIZE);
3539 /* BB FIXME add code to fail this if NTLMv2 or Kerberos
3540 specified as required (when that support is added to
3541 the vfs in the future) as only NTLM or the much
3542 weaker LANMAN (which we do not send by default) is accepted
3543 by Samba (not sure whether other servers allow
3544 NTLMv2 password here) */
3545 #ifdef CONFIG_CIFS_WEAK_PW_HASH
3546 if ((extended_security & CIFSSEC_MAY_LANMAN) &&
3547 (ses->server->secType == LANMAN))
3548 calc_lanman_hash(tcon->password, ses->server->cryptKey,
3549 ses->server->secMode &
3550 SECMODE_PW_ENCRYPT ? true : false,
3551 bcc_ptr);
3552 else
3553 #endif /* CIFS_WEAK_PW_HASH */
3554 SMBNTencrypt(tcon->password, ses->server->cryptKey,
3555 bcc_ptr);
3556
3557 bcc_ptr += CIFS_SESS_KEY_SIZE;
3558 if (ses->capabilities & CAP_UNICODE) {
3559 /* must align unicode strings */
3560 *bcc_ptr = 0; /* null byte password */
3561 bcc_ptr++;
3562 }
3563 }
3564
3565 if (ses->server->secMode &
3566 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
3567 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
3568
3569 if (ses->capabilities & CAP_STATUS32) {
3570 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
3571 }
3572 if (ses->capabilities & CAP_DFS) {
3573 smb_buffer->Flags2 |= SMBFLG2_DFS;
3574 }
3575 if (ses->capabilities & CAP_UNICODE) {
3576 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
3577 length =
3578 cifs_strtoUCS((__le16 *) bcc_ptr, tree,
3579 6 /* max utf8 char length in bytes */ *
3580 (/* server len*/ + 256 /* share len */), nls_codepage);
3581 bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */
3582 bcc_ptr += 2; /* skip trailing null */
3583 } else { /* ASCII */
3584 strcpy(bcc_ptr, tree);
3585 bcc_ptr += strlen(tree) + 1;
3586 }
3587 strcpy(bcc_ptr, "?????");
3588 bcc_ptr += strlen("?????");
3589 bcc_ptr += 1;
3590 count = bcc_ptr - &pSMB->Password[0];
3591 pSMB->hdr.smb_buf_length += count;
3592 pSMB->ByteCount = cpu_to_le16(count);
3593
3594 rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length,
3595 CIFS_STD_OP);
3596
3597 /* if (rc) rc = map_smb_to_linux_error(smb_buffer_response); */
3598 /* above now done in SendReceive */
3599 if ((rc == 0) && (tcon != NULL)) {
3600 tcon->tidStatus = CifsGood;
3601 tcon->need_reconnect = false;
3602 tcon->tid = smb_buffer_response->Tid;
3603 bcc_ptr = pByteArea(smb_buffer_response);
3604 length = strnlen(bcc_ptr, BCC(smb_buffer_response) - 2);
3605 /* skip service field (NB: this field is always ASCII) */
3606 if (length == 3) {
3607 if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') &&
3608 (bcc_ptr[2] == 'C')) {
3609 cFYI(1, ("IPC connection"));
3610 tcon->ipc = 1;
3611 }
3612 } else if (length == 2) {
3613 if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) {
3614 /* the most common case */
3615 cFYI(1, ("disk share connection"));
3616 }
3617 }
3618 bcc_ptr += length + 1;
3619 strncpy(tcon->treeName, tree, MAX_TREE_SIZE);
3620 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
3621 length = UniStrnlen((wchar_t *) bcc_ptr, 512);
3622 if ((bcc_ptr + (2 * length)) -
3623 pByteArea(smb_buffer_response) <=
3624 BCC(smb_buffer_response)) {
3625 kfree(tcon->nativeFileSystem);
3626 tcon->nativeFileSystem =
3627 kzalloc(length + 2, GFP_KERNEL);
3628 if (tcon->nativeFileSystem)
3629 cifs_strfromUCS_le(
3630 tcon->nativeFileSystem,
3631 (__le16 *) bcc_ptr,
3632 length, nls_codepage);
3633 bcc_ptr += 2 * length;
3634 bcc_ptr[0] = 0; /* null terminate the string */
3635 bcc_ptr[1] = 0;
3636 bcc_ptr += 2;
3637 }
3638 /* else do not bother copying these information fields*/
3639 } else {
3640 length = strnlen(bcc_ptr, 1024);
3641 if ((bcc_ptr + length) -
3642 pByteArea(smb_buffer_response) <=
3643 BCC(smb_buffer_response)) {
3644 kfree(tcon->nativeFileSystem);
3645 tcon->nativeFileSystem =
3646 kzalloc(length + 1, GFP_KERNEL);
3647 if (tcon->nativeFileSystem)
3648 strncpy(tcon->nativeFileSystem, bcc_ptr,
3649 length);
3650 }
3651 /* else do not bother copying these information fields*/
3652 }
3653 if ((smb_buffer_response->WordCount == 3) ||
3654 (smb_buffer_response->WordCount == 7))
3655 /* field is in same location */
3656 tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport);
3657 else
3658 tcon->Flags = 0;
3659 cFYI(1, ("Tcon flags: 0x%x ", tcon->Flags));
3660 } else if ((rc == 0) && tcon == NULL) {
3661 /* all we need to save for IPC$ connection */
3662 ses->ipc_tid = smb_buffer_response->Tid;
3663 }
3664
3665 cifs_buf_release(smb_buffer);
3666 return rc;
3667 }
3668
3669 int
3670 cifs_umount(struct super_block *sb, struct cifs_sb_info *cifs_sb)
3671 {
3672 int rc = 0;
3673 char *tmp;
3674
3675 if (cifs_sb->tcon)
3676 cifs_put_tcon(cifs_sb->tcon);
3677
3678 cifs_sb->tcon = NULL;
3679 tmp = cifs_sb->prepath;
3680 cifs_sb->prepathlen = 0;
3681 cifs_sb->prepath = NULL;
3682 kfree(tmp);
3683
3684 return rc;
3685 }
3686
3687 int cifs_setup_session(unsigned int xid, struct cifsSesInfo *pSesInfo,
3688 struct nls_table *nls_info)
3689 {
3690 int rc = 0;
3691 char ntlm_session_key[CIFS_SESS_KEY_SIZE];
3692 bool ntlmv2_flag = false;
3693 int first_time = 0;
3694 struct TCP_Server_Info *server = pSesInfo->server;
3695
3696 /* what if server changes its buffer size after dropping the session? */
3697 if (server->maxBuf == 0) /* no need to send on reconnect */ {
3698 rc = CIFSSMBNegotiate(xid, pSesInfo);
3699 if (rc == -EAGAIN) {
3700 /* retry only once on 1st time connection */
3701 rc = CIFSSMBNegotiate(xid, pSesInfo);
3702 if (rc == -EAGAIN)
3703 rc = -EHOSTDOWN;
3704 }
3705 if (rc == 0) {
3706 spin_lock(&GlobalMid_Lock);
3707 if (server->tcpStatus != CifsExiting)
3708 server->tcpStatus = CifsGood;
3709 else
3710 rc = -EHOSTDOWN;
3711 spin_unlock(&GlobalMid_Lock);
3712
3713 }
3714 first_time = 1;
3715 }
3716
3717 if (rc)
3718 goto ss_err_exit;
3719
3720 pSesInfo->flags = 0;
3721 pSesInfo->capabilities = server->capabilities;
3722 if (linuxExtEnabled == 0)
3723 pSesInfo->capabilities &= (~CAP_UNIX);
3724 /* pSesInfo->sequence_number = 0;*/
3725 cFYI(1, ("Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d",
3726 server->secMode, server->capabilities, server->timeAdj));
3727
3728 if (experimEnabled < 2)
3729 rc = CIFS_SessSetup(xid, pSesInfo, first_time, nls_info);
3730 else if (extended_security
3731 && (pSesInfo->capabilities & CAP_EXTENDED_SECURITY)
3732 && (server->secType == NTLMSSP)) {
3733 rc = -EOPNOTSUPP;
3734 } else if (extended_security
3735 && (pSesInfo->capabilities & CAP_EXTENDED_SECURITY)
3736 && (server->secType == RawNTLMSSP)) {
3737 cFYI(1, ("NTLMSSP sesssetup"));
3738 rc = CIFSNTLMSSPNegotiateSessSetup(xid, pSesInfo, &ntlmv2_flag,
3739 nls_info);
3740 if (!rc) {
3741 if (ntlmv2_flag) {
3742 char *v2_response;
3743 cFYI(1, ("more secure NTLM ver2 hash"));
3744 if (CalcNTLMv2_partial_mac_key(pSesInfo,
3745 nls_info)) {
3746 rc = -ENOMEM;
3747 goto ss_err_exit;
3748 } else
3749 v2_response = kmalloc(16 + 64 /* blob*/,
3750 GFP_KERNEL);
3751 if (v2_response) {
3752 CalcNTLMv2_response(pSesInfo,
3753 v2_response);
3754 /* if (first_time)
3755 cifs_calculate_ntlmv2_mac_key */
3756 kfree(v2_response);
3757 /* BB Put dummy sig in SessSetup PDU? */
3758 } else {
3759 rc = -ENOMEM;
3760 goto ss_err_exit;
3761 }
3762
3763 } else {
3764 SMBNTencrypt(pSesInfo->password,
3765 server->cryptKey,
3766 ntlm_session_key);
3767
3768 if (first_time)
3769 cifs_calculate_mac_key(
3770 &server->mac_signing_key,
3771 ntlm_session_key,
3772 pSesInfo->password);
3773 }
3774 /* for better security the weaker lanman hash not sent
3775 in AuthSessSetup so we no longer calculate it */
3776
3777 rc = CIFSNTLMSSPAuthSessSetup(xid, pSesInfo,
3778 ntlm_session_key,
3779 ntlmv2_flag,
3780 nls_info);
3781 }
3782 } else { /* old style NTLM 0.12 session setup */
3783 SMBNTencrypt(pSesInfo->password, server->cryptKey,
3784 ntlm_session_key);
3785
3786 if (first_time)
3787 cifs_calculate_mac_key(&server->mac_signing_key,
3788 ntlm_session_key,
3789 pSesInfo->password);
3790
3791 rc = CIFSSessSetup(xid, pSesInfo, ntlm_session_key, nls_info);
3792 }
3793 if (rc) {
3794 cERROR(1, ("Send error in SessSetup = %d", rc));
3795 } else {
3796 cFYI(1, ("CIFS Session Established successfully"));
3797 spin_lock(&GlobalMid_Lock);
3798 pSesInfo->status = CifsGood;
3799 pSesInfo->need_reconnect = false;
3800 spin_unlock(&GlobalMid_Lock);
3801 }
3802
3803 ss_err_exit:
3804 return rc;
3805 }
3806
x86 "subsystem" repository