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[CIFS] Add new nostrictsync cifs mount option to avoid slow SMB flush
[linux-2.6/verdex.git] / fs / cifs / connect.c
blob18e84a4e0504d5695586e5aec4f23e3bf89862ee
1 /*
2 * fs/cifs/connect.c
3 *
4 * Copyright (C) International Business Machines Corp., 2002,2008
5 * Author(s): Steve French (sfrench@us.ibm.com)
6 *
7 * This library is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU Lesser General Public License as published
9 * by the Free Software Foundation; either version 2.1 of the License, or
10 * (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
15 * the GNU Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public License
18 * along with this library; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21 #include <linux/fs.h>
22 #include <linux/net.h>
23 #include <linux/string.h>
24 #include <linux/list.h>
25 #include <linux/wait.h>
26 #include <linux/pagemap.h>
27 #include <linux/ctype.h>
28 #include <linux/utsname.h>
29 #include <linux/mempool.h>
30 #include <linux/delay.h>
31 #include <linux/completion.h>
32 #include <linux/kthread.h>
33 #include <linux/pagevec.h>
34 #include <linux/freezer.h>
35 #include <asm/uaccess.h>
36 #include <asm/processor.h>
37 #include <net/ipv6.h>
38 #include "cifspdu.h"
39 #include "cifsglob.h"
40 #include "cifsproto.h"
41 #include "cifs_unicode.h"
42 #include "cifs_debug.h"
43 #include "cifs_fs_sb.h"
44 #include "ntlmssp.h"
45 #include "nterr.h"
46 #include "rfc1002pdu.h"
47 #include "cn_cifs.h"
48
49 #define CIFS_PORT 445
50 #define RFC1001_PORT 139
51
52 extern void SMBNTencrypt(unsigned char *passwd, unsigned char *c8,
53 unsigned char *p24);
54
55 extern mempool_t *cifs_req_poolp;
56
57 struct smb_vol {
58 char *username;
59 char *password;
60 char *domainname;
61 char *UNC;
62 char *UNCip;
63 char *in6_addr; /* ipv6 address as human readable form of in6_addr */
64 char *iocharset; /* local code page for mapping to and from Unicode */
65 char source_rfc1001_name[16]; /* netbios name of client */
66 char target_rfc1001_name[16]; /* netbios name of server for Win9x/ME */
67 uid_t linux_uid;
68 gid_t linux_gid;
69 mode_t file_mode;
70 mode_t dir_mode;
71 unsigned secFlg;
72 bool rw:1;
73 bool retry:1;
74 bool intr:1;
75 bool setuids:1;
76 bool override_uid:1;
77 bool override_gid:1;
78 bool dynperm:1;
79 bool noperm:1;
80 bool no_psx_acl:1; /* set if posix acl support should be disabled */
81 bool cifs_acl:1;
82 bool no_xattr:1; /* set if xattr (EA) support should be disabled*/
83 bool server_ino:1; /* use inode numbers from server ie UniqueId */
84 bool direct_io:1;
85 bool remap:1; /* set to remap seven reserved chars in filenames */
86 bool posix_paths:1; /* unset to not ask for posix pathnames. */
87 bool no_linux_ext:1;
88 bool sfu_emul:1;
89 bool nullauth:1; /* attempt to authenticate with null user */
90 bool nocase:1; /* request case insensitive filenames */
91 bool nobrl:1; /* disable sending byte range locks to srv */
92 bool mand_lock:1; /* send mandatory not posix byte range lock reqs */
93 bool seal:1; /* request transport encryption on share */
94 bool nodfs:1; /* Do not request DFS, even if available */
95 bool local_lease:1; /* check leases only on local system, not remote */
96 bool noblocksnd:1;
97 bool noautotune:1;
98 bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
99 unsigned int rsize;
100 unsigned int wsize;
101 unsigned int sockopt;
102 unsigned short int port;
103 char *prepath;
104 };
105
106 static int ipv4_connect(struct TCP_Server_Info *server);
107 static int ipv6_connect(struct TCP_Server_Info *server);
108
109 /*
110 * cifs tcp session reconnection
111 *
112 * mark tcp session as reconnecting so temporarily locked
113 * mark all smb sessions as reconnecting for tcp session
114 * reconnect tcp session
115 * wake up waiters on reconnection? - (not needed currently)
116 */
117 static int
118 cifs_reconnect(struct TCP_Server_Info *server)
119 {
120 int rc = 0;
121 struct list_head *tmp, *tmp2;
122 struct cifsSesInfo *ses;
123 struct cifsTconInfo *tcon;
124 struct mid_q_entry *mid_entry;
125
126 spin_lock(&GlobalMid_Lock);
127 if (server->tcpStatus == CifsExiting) {
128 /* the demux thread will exit normally
129 next time through the loop */
130 spin_unlock(&GlobalMid_Lock);
131 return rc;
132 } else
133 server->tcpStatus = CifsNeedReconnect;
134 spin_unlock(&GlobalMid_Lock);
135 server->maxBuf = 0;
136
137 cFYI(1, ("Reconnecting tcp session"));
138
139 /* before reconnecting the tcp session, mark the smb session (uid)
140 and the tid bad so they are not used until reconnected */
141 read_lock(&cifs_tcp_ses_lock);
142 list_for_each(tmp, &server->smb_ses_list) {
143 ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list);
144 ses->need_reconnect = true;
145 ses->ipc_tid = 0;
146 list_for_each(tmp2, &ses->tcon_list) {
147 tcon = list_entry(tmp2, struct cifsTconInfo, tcon_list);
148 tcon->need_reconnect = true;
149 }
150 }
151 read_unlock(&cifs_tcp_ses_lock);
152 /* do not want to be sending data on a socket we are freeing */
153 mutex_lock(&server->srv_mutex);
154 if (server->ssocket) {
155 cFYI(1, ("State: 0x%x Flags: 0x%lx", server->ssocket->state,
156 server->ssocket->flags));
157 kernel_sock_shutdown(server->ssocket, SHUT_WR);
158 cFYI(1, ("Post shutdown state: 0x%x Flags: 0x%lx",
159 server->ssocket->state,
160 server->ssocket->flags));
161 sock_release(server->ssocket);
162 server->ssocket = NULL;
163 }
164
165 spin_lock(&GlobalMid_Lock);
166 list_for_each(tmp, &server->pending_mid_q) {
167 mid_entry = list_entry(tmp, struct
168 mid_q_entry,
169 qhead);
170 if (mid_entry->midState == MID_REQUEST_SUBMITTED) {
171 /* Mark other intransit requests as needing
172 retry so we do not immediately mark the
173 session bad again (ie after we reconnect
174 below) as they timeout too */
175 mid_entry->midState = MID_RETRY_NEEDED;
176 }
177 }
178 spin_unlock(&GlobalMid_Lock);
179 mutex_unlock(&server->srv_mutex);
180
181 while ((server->tcpStatus != CifsExiting) &&
182 (server->tcpStatus != CifsGood)) {
183 try_to_freeze();
184 if (server->addr.sockAddr6.sin6_family == AF_INET6)
185 rc = ipv6_connect(server);
186 else
187 rc = ipv4_connect(server);
188 if (rc) {
189 cFYI(1, ("reconnect error %d", rc));
190 msleep(3000);
191 } else {
192 atomic_inc(&tcpSesReconnectCount);
193 spin_lock(&GlobalMid_Lock);
194 if (server->tcpStatus != CifsExiting)
195 server->tcpStatus = CifsGood;
196 server->sequence_number = 0;
197 spin_unlock(&GlobalMid_Lock);
198 /* atomic_set(&server->inFlight,0);*/
199 wake_up(&server->response_q);
200 }
201 }
202 return rc;
203 }
204
205 /*
206 return codes:
207 0 not a transact2, or all data present
208 >0 transact2 with that much data missing
209 -EINVAL = invalid transact2
210
211 */
212 static int check2ndT2(struct smb_hdr *pSMB, unsigned int maxBufSize)
213 {
214 struct smb_t2_rsp *pSMBt;
215 int total_data_size;
216 int data_in_this_rsp;
217 int remaining;
218
219 if (pSMB->Command != SMB_COM_TRANSACTION2)
220 return 0;
221
222 /* check for plausible wct, bcc and t2 data and parm sizes */
223 /* check for parm and data offset going beyond end of smb */
224 if (pSMB->WordCount != 10) { /* coalesce_t2 depends on this */
225 cFYI(1, ("invalid transact2 word count"));
226 return -EINVAL;
227 }
228
229 pSMBt = (struct smb_t2_rsp *)pSMB;
230
231 total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
232 data_in_this_rsp = le16_to_cpu(pSMBt->t2_rsp.DataCount);
233
234 remaining = total_data_size - data_in_this_rsp;
235
236 if (remaining == 0)
237 return 0;
238 else if (remaining < 0) {
239 cFYI(1, ("total data %d smaller than data in frame %d",
240 total_data_size, data_in_this_rsp));
241 return -EINVAL;
242 } else {
243 cFYI(1, ("missing %d bytes from transact2, check next response",
244 remaining));
245 if (total_data_size > maxBufSize) {
246 cERROR(1, ("TotalDataSize %d is over maximum buffer %d",
247 total_data_size, maxBufSize));
248 return -EINVAL;
249 }
250 return remaining;
251 }
252 }
253
254 static int coalesce_t2(struct smb_hdr *psecond, struct smb_hdr *pTargetSMB)
255 {
256 struct smb_t2_rsp *pSMB2 = (struct smb_t2_rsp *)psecond;
257 struct smb_t2_rsp *pSMBt = (struct smb_t2_rsp *)pTargetSMB;
258 int total_data_size;
259 int total_in_buf;
260 int remaining;
261 int total_in_buf2;
262 char *data_area_of_target;
263 char *data_area_of_buf2;
264 __u16 byte_count;
265
266 total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
267
268 if (total_data_size != le16_to_cpu(pSMB2->t2_rsp.TotalDataCount)) {
269 cFYI(1, ("total data size of primary and secondary t2 differ"));
270 }
271
272 total_in_buf = le16_to_cpu(pSMBt->t2_rsp.DataCount);
273
274 remaining = total_data_size - total_in_buf;
275
276 if (remaining < 0)
277 return -EINVAL;
278
279 if (remaining == 0) /* nothing to do, ignore */
280 return 0;
281
282 total_in_buf2 = le16_to_cpu(pSMB2->t2_rsp.DataCount);
283 if (remaining < total_in_buf2) {
284 cFYI(1, ("transact2 2nd response contains too much data"));
285 }
286
287 /* find end of first SMB data area */
288 data_area_of_target = (char *)&pSMBt->hdr.Protocol +
289 le16_to_cpu(pSMBt->t2_rsp.DataOffset);
290 /* validate target area */
291
292 data_area_of_buf2 = (char *) &pSMB2->hdr.Protocol +
293 le16_to_cpu(pSMB2->t2_rsp.DataOffset);
294
295 data_area_of_target += total_in_buf;
296
297 /* copy second buffer into end of first buffer */
298 memcpy(data_area_of_target, data_area_of_buf2, total_in_buf2);
299 total_in_buf += total_in_buf2;
300 pSMBt->t2_rsp.DataCount = cpu_to_le16(total_in_buf);
301 byte_count = le16_to_cpu(BCC_LE(pTargetSMB));
302 byte_count += total_in_buf2;
303 BCC_LE(pTargetSMB) = cpu_to_le16(byte_count);
304
305 byte_count = pTargetSMB->smb_buf_length;
306 byte_count += total_in_buf2;
307
308 /* BB also add check that we are not beyond maximum buffer size */
309
310 pTargetSMB->smb_buf_length = byte_count;
311
312 if (remaining == total_in_buf2) {
313 cFYI(1, ("found the last secondary response"));
314 return 0; /* we are done */
315 } else /* more responses to go */
316 return 1;
317
318 }
319
320 static int
321 cifs_demultiplex_thread(struct TCP_Server_Info *server)
322 {
323 int length;
324 unsigned int pdu_length, total_read;
325 struct smb_hdr *smb_buffer = NULL;
326 struct smb_hdr *bigbuf = NULL;
327 struct smb_hdr *smallbuf = NULL;
328 struct msghdr smb_msg;
329 struct kvec iov;
330 struct socket *csocket = server->ssocket;
331 struct list_head *tmp;
332 struct cifsSesInfo *ses;
333 struct task_struct *task_to_wake = NULL;
334 struct mid_q_entry *mid_entry;
335 char temp;
336 bool isLargeBuf = false;
337 bool isMultiRsp;
338 int reconnect;
339
340 current->flags |= PF_MEMALLOC;
341 cFYI(1, ("Demultiplex PID: %d", task_pid_nr(current)));
342
343 length = atomic_inc_return(&tcpSesAllocCount);
344 if (length > 1)
345 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
346 GFP_KERNEL);
347
348 set_freezable();
349 while (server->tcpStatus != CifsExiting) {
350 if (try_to_freeze())
351 continue;
352 if (bigbuf == NULL) {
353 bigbuf = cifs_buf_get();
354 if (!bigbuf) {
355 cERROR(1, ("No memory for large SMB response"));
356 msleep(3000);
357 /* retry will check if exiting */
358 continue;
359 }
360 } else if (isLargeBuf) {
361 /* we are reusing a dirty large buf, clear its start */
362 memset(bigbuf, 0, sizeof(struct smb_hdr));
363 }
364
365 if (smallbuf == NULL) {
366 smallbuf = cifs_small_buf_get();
367 if (!smallbuf) {
368 cERROR(1, ("No memory for SMB response"));
369 msleep(1000);
370 /* retry will check if exiting */
371 continue;
372 }
373 /* beginning of smb buffer is cleared in our buf_get */
374 } else /* if existing small buf clear beginning */
375 memset(smallbuf, 0, sizeof(struct smb_hdr));
376
377 isLargeBuf = false;
378 isMultiRsp = false;
379 smb_buffer = smallbuf;
380 iov.iov_base = smb_buffer;
381 iov.iov_len = 4;
382 smb_msg.msg_control = NULL;
383 smb_msg.msg_controllen = 0;
384 pdu_length = 4; /* enough to get RFC1001 header */
385 incomplete_rcv:
386 length =
387 kernel_recvmsg(csocket, &smb_msg,
388 &iov, 1, pdu_length, 0 /* BB other flags? */);
389
390 if (server->tcpStatus == CifsExiting) {
391 break;
392 } else if (server->tcpStatus == CifsNeedReconnect) {
393 cFYI(1, ("Reconnect after server stopped responding"));
394 cifs_reconnect(server);
395 cFYI(1, ("call to reconnect done"));
396 csocket = server->ssocket;
397 continue;
398 } else if ((length == -ERESTARTSYS) || (length == -EAGAIN)) {
399 msleep(1); /* minimum sleep to prevent looping
400 allowing socket to clear and app threads to set
401 tcpStatus CifsNeedReconnect if server hung */
402 if (pdu_length < 4) {
403 iov.iov_base = (4 - pdu_length) +
404 (char *)smb_buffer;
405 iov.iov_len = pdu_length;
406 smb_msg.msg_control = NULL;
407 smb_msg.msg_controllen = 0;
408 goto incomplete_rcv;
409 } else
410 continue;
411 } else if (length <= 0) {
412 if (server->tcpStatus == CifsNew) {
413 cFYI(1, ("tcp session abend after SMBnegprot"));
414 /* some servers kill the TCP session rather than
415 returning an SMB negprot error, in which
416 case reconnecting here is not going to help,
417 and so simply return error to mount */
418 break;
419 }
420 if (!try_to_freeze() && (length == -EINTR)) {
421 cFYI(1, ("cifsd thread killed"));
422 break;
423 }
424 cFYI(1, ("Reconnect after unexpected peek error %d",
425 length));
426 cifs_reconnect(server);
427 csocket = server->ssocket;
428 wake_up(&server->response_q);
429 continue;
430 } else if (length < pdu_length) {
431 cFYI(1, ("requested %d bytes but only got %d bytes",
432 pdu_length, length));
433 pdu_length -= length;
434 msleep(1);
435 goto incomplete_rcv;
436 }
437
438 /* The right amount was read from socket - 4 bytes */
439 /* so we can now interpret the length field */
440
441 /* the first byte big endian of the length field,
442 is actually not part of the length but the type
443 with the most common, zero, as regular data */
444 temp = *((char *) smb_buffer);
445
446 /* Note that FC 1001 length is big endian on the wire,
447 but we convert it here so it is always manipulated
448 as host byte order */
449 pdu_length = be32_to_cpu((__force __be32)smb_buffer->smb_buf_length);
450 smb_buffer->smb_buf_length = pdu_length;
451
452 cFYI(1, ("rfc1002 length 0x%x", pdu_length+4));
453
454 if (temp == (char) RFC1002_SESSION_KEEP_ALIVE) {
455 continue;
456 } else if (temp == (char)RFC1002_POSITIVE_SESSION_RESPONSE) {
457 cFYI(1, ("Good RFC 1002 session rsp"));
458 continue;
459 } else if (temp == (char)RFC1002_NEGATIVE_SESSION_RESPONSE) {
460 /* we get this from Windows 98 instead of
461 an error on SMB negprot response */
462 cFYI(1, ("Negative RFC1002 Session Response Error 0x%x)",
463 pdu_length));
464 if (server->tcpStatus == CifsNew) {
465 /* if nack on negprot (rather than
466 ret of smb negprot error) reconnecting
467 not going to help, ret error to mount */
468 break;
469 } else {
470 /* give server a second to
471 clean up before reconnect attempt */
472 msleep(1000);
473 /* always try 445 first on reconnect
474 since we get NACK on some if we ever
475 connected to port 139 (the NACK is
476 since we do not begin with RFC1001
477 session initialize frame) */
478 server->addr.sockAddr.sin_port =
479 htons(CIFS_PORT);
480 cifs_reconnect(server);
481 csocket = server->ssocket;
482 wake_up(&server->response_q);
483 continue;
484 }
485 } else if (temp != (char) 0) {
486 cERROR(1, ("Unknown RFC 1002 frame"));
487 cifs_dump_mem(" Received Data: ", (char *)smb_buffer,
488 length);
489 cifs_reconnect(server);
490 csocket = server->ssocket;
491 continue;
492 }
493
494 /* else we have an SMB response */
495 if ((pdu_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) ||
496 (pdu_length < sizeof(struct smb_hdr) - 1 - 4)) {
497 cERROR(1, ("Invalid size SMB length %d pdu_length %d",
498 length, pdu_length+4));
499 cifs_reconnect(server);
500 csocket = server->ssocket;
501 wake_up(&server->response_q);
502 continue;
503 }
504
505 /* else length ok */
506 reconnect = 0;
507
508 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) {
509 isLargeBuf = true;
510 memcpy(bigbuf, smallbuf, 4);
511 smb_buffer = bigbuf;
512 }
513 length = 0;
514 iov.iov_base = 4 + (char *)smb_buffer;
515 iov.iov_len = pdu_length;
516 for (total_read = 0; total_read < pdu_length;
517 total_read += length) {
518 length = kernel_recvmsg(csocket, &smb_msg, &iov, 1,
519 pdu_length - total_read, 0);
520 if ((server->tcpStatus == CifsExiting) ||
521 (length == -EINTR)) {
522 /* then will exit */
523 reconnect = 2;
524 break;
525 } else if (server->tcpStatus == CifsNeedReconnect) {
526 cifs_reconnect(server);
527 csocket = server->ssocket;
528 /* Reconnect wakes up rspns q */
529 /* Now we will reread sock */
530 reconnect = 1;
531 break;
532 } else if ((length == -ERESTARTSYS) ||
533 (length == -EAGAIN)) {
534 msleep(1); /* minimum sleep to prevent looping,
535 allowing socket to clear and app
536 threads to set tcpStatus
537 CifsNeedReconnect if server hung*/
538 length = 0;
539 continue;
540 } else if (length <= 0) {
541 cERROR(1, ("Received no data, expecting %d",
542 pdu_length - total_read));
543 cifs_reconnect(server);
544 csocket = server->ssocket;
545 reconnect = 1;
546 break;
547 }
548 }
549 if (reconnect == 2)
550 break;
551 else if (reconnect == 1)
552 continue;
553
554 length += 4; /* account for rfc1002 hdr */
555
556
557 dump_smb(smb_buffer, length);
558 if (checkSMB(smb_buffer, smb_buffer->Mid, total_read+4)) {
559 cifs_dump_mem("Bad SMB: ", smb_buffer, 48);
560 continue;
561 }
562
563
564 task_to_wake = NULL;
565 spin_lock(&GlobalMid_Lock);
566 list_for_each(tmp, &server->pending_mid_q) {
567 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
568
569 if ((mid_entry->mid == smb_buffer->Mid) &&
570 (mid_entry->midState == MID_REQUEST_SUBMITTED) &&
571 (mid_entry->command == smb_buffer->Command)) {
572 if (check2ndT2(smb_buffer,server->maxBuf) > 0) {
573 /* We have a multipart transact2 resp */
574 isMultiRsp = true;
575 if (mid_entry->resp_buf) {
576 /* merge response - fix up 1st*/
577 if (coalesce_t2(smb_buffer,
578 mid_entry->resp_buf)) {
579 mid_entry->multiRsp =
580 true;
581 break;
582 } else {
583 /* all parts received */
584 mid_entry->multiEnd =
585 true;
586 goto multi_t2_fnd;
587 }
588 } else {
589 if (!isLargeBuf) {
590 cERROR(1,("1st trans2 resp needs bigbuf"));
591 /* BB maybe we can fix this up, switch
592 to already allocated large buffer? */
593 } else {
594 /* Have first buffer */
595 mid_entry->resp_buf =
596 smb_buffer;
597 mid_entry->largeBuf =
598 true;
599 bigbuf = NULL;
600 }
601 }
602 break;
603 }
604 mid_entry->resp_buf = smb_buffer;
605 mid_entry->largeBuf = isLargeBuf;
606 multi_t2_fnd:
607 task_to_wake = mid_entry->tsk;
608 mid_entry->midState = MID_RESPONSE_RECEIVED;
609 #ifdef CONFIG_CIFS_STATS2
610 mid_entry->when_received = jiffies;
611 #endif
612 /* so we do not time out requests to server
613 which is still responding (since server could
614 be busy but not dead) */
615 server->lstrp = jiffies;
616 break;
617 }
618 }
619 spin_unlock(&GlobalMid_Lock);
620 if (task_to_wake) {
621 /* Was previous buf put in mpx struct for multi-rsp? */
622 if (!isMultiRsp) {
623 /* smb buffer will be freed by user thread */
624 if (isLargeBuf)
625 bigbuf = NULL;
626 else
627 smallbuf = NULL;
628 }
629 wake_up_process(task_to_wake);
630 } else if (!is_valid_oplock_break(smb_buffer, server) &&
631 !isMultiRsp) {
632 cERROR(1, ("No task to wake, unknown frame received! "
633 "NumMids %d", midCount.counter));
634 cifs_dump_mem("Received Data is: ", (char *)smb_buffer,
635 sizeof(struct smb_hdr));
636 #ifdef CONFIG_CIFS_DEBUG2
637 cifs_dump_detail(smb_buffer);
638 cifs_dump_mids(server);
639 #endif /* CIFS_DEBUG2 */
640
641 }
642 } /* end while !EXITING */
643
644 /* take it off the list, if it's not already */
645 write_lock(&cifs_tcp_ses_lock);
646 list_del_init(&server->tcp_ses_list);
647 write_unlock(&cifs_tcp_ses_lock);
648
649 spin_lock(&GlobalMid_Lock);
650 server->tcpStatus = CifsExiting;
651 spin_unlock(&GlobalMid_Lock);
652 wake_up_all(&server->response_q);
653
654 /* check if we have blocked requests that need to free */
655 /* Note that cifs_max_pending is normally 50, but
656 can be set at module install time to as little as two */
657 spin_lock(&GlobalMid_Lock);
658 if (atomic_read(&server->inFlight) >= cifs_max_pending)
659 atomic_set(&server->inFlight, cifs_max_pending - 1);
660 /* We do not want to set the max_pending too low or we
661 could end up with the counter going negative */
662 spin_unlock(&GlobalMid_Lock);
663 /* Although there should not be any requests blocked on
664 this queue it can not hurt to be paranoid and try to wake up requests
665 that may haven been blocked when more than 50 at time were on the wire
666 to the same server - they now will see the session is in exit state
667 and get out of SendReceive. */
668 wake_up_all(&server->request_q);
669 /* give those requests time to exit */
670 msleep(125);
671
672 if (server->ssocket) {
673 sock_release(csocket);
674 server->ssocket = NULL;
675 }
676 /* buffer usuallly freed in free_mid - need to free it here on exit */
677 cifs_buf_release(bigbuf);
678 if (smallbuf) /* no sense logging a debug message if NULL */
679 cifs_small_buf_release(smallbuf);
680
681 /*
682 * BB: we shouldn't have to do any of this. It shouldn't be
683 * possible to exit from the thread with active SMB sessions
684 */
685 read_lock(&cifs_tcp_ses_lock);
686 if (list_empty(&server->pending_mid_q)) {
687 /* loop through server session structures attached to this and
688 mark them dead */
689 list_for_each(tmp, &server->smb_ses_list) {
690 ses = list_entry(tmp, struct cifsSesInfo,
691 smb_ses_list);
692 ses->status = CifsExiting;
693 ses->server = NULL;
694 }
695 read_unlock(&cifs_tcp_ses_lock);
696 } else {
697 /* although we can not zero the server struct pointer yet,
698 since there are active requests which may depnd on them,
699 mark the corresponding SMB sessions as exiting too */
700 list_for_each(tmp, &server->smb_ses_list) {
701 ses = list_entry(tmp, struct cifsSesInfo,
702 smb_ses_list);
703 ses->status = CifsExiting;
704 }
705
706 spin_lock(&GlobalMid_Lock);
707 list_for_each(tmp, &server->pending_mid_q) {
708 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
709 if (mid_entry->midState == MID_REQUEST_SUBMITTED) {
710 cFYI(1, ("Clearing Mid 0x%x - waking up ",
711 mid_entry->mid));
712 task_to_wake = mid_entry->tsk;
713 if (task_to_wake)
714 wake_up_process(task_to_wake);
715 }
716 }
717 spin_unlock(&GlobalMid_Lock);
718 read_unlock(&cifs_tcp_ses_lock);
719 /* 1/8th of sec is more than enough time for them to exit */
720 msleep(125);
721 }
722
723 if (!list_empty(&server->pending_mid_q)) {
724 /* mpx threads have not exited yet give them
725 at least the smb send timeout time for long ops */
726 /* due to delays on oplock break requests, we need
727 to wait at least 45 seconds before giving up
728 on a request getting a response and going ahead
729 and killing cifsd */
730 cFYI(1, ("Wait for exit from demultiplex thread"));
731 msleep(46000);
732 /* if threads still have not exited they are probably never
733 coming home not much else we can do but free the memory */
734 }
735
736 /* last chance to mark ses pointers invalid
737 if there are any pointing to this (e.g
738 if a crazy root user tried to kill cifsd
739 kernel thread explicitly this might happen) */
740 /* BB: This shouldn't be necessary, see above */
741 read_lock(&cifs_tcp_ses_lock);
742 list_for_each(tmp, &server->smb_ses_list) {
743 ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list);
744 ses->server = NULL;
745 }
746 read_unlock(&cifs_tcp_ses_lock);
747
748 kfree(server->hostname);
749 task_to_wake = xchg(&server->tsk, NULL);
750 kfree(server);
751
752 length = atomic_dec_return(&tcpSesAllocCount);
753 if (length > 0)
754 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
755 GFP_KERNEL);
756
757 /* if server->tsk was NULL then wait for a signal before exiting */
758 if (!task_to_wake) {
759 set_current_state(TASK_INTERRUPTIBLE);
760 while (!signal_pending(current)) {
761 schedule();
762 set_current_state(TASK_INTERRUPTIBLE);
763 }
764 set_current_state(TASK_RUNNING);
765 }
766
767 module_put_and_exit(0);
768 }
769
770 /* extract the host portion of the UNC string */
771 static char *
772 extract_hostname(const char *unc)
773 {
774 const char *src;
775 char *dst, *delim;
776 unsigned int len;
777
778 /* skip double chars at beginning of string */
779 /* BB: check validity of these bytes? */
780 src = unc + 2;
781
782 /* delimiter between hostname and sharename is always '\\' now */
783 delim = strchr(src, '\\');
784 if (!delim)
785 return ERR_PTR(-EINVAL);
786
787 len = delim - src;
788 dst = kmalloc((len + 1), GFP_KERNEL);
789 if (dst == NULL)
790 return ERR_PTR(-ENOMEM);
791
792 memcpy(dst, src, len);
793 dst[len] = '\0';
794
795 return dst;
796 }
797
798 static int
799 cifs_parse_mount_options(char *options, const char *devname,
800 struct smb_vol *vol)
801 {
802 char *value;
803 char *data;
804 unsigned int temp_len, i, j;
805 char separator[2];
806
807 separator[0] = ',';
808 separator[1] = 0;
809
810 if (Local_System_Name[0] != 0)
811 memcpy(vol->source_rfc1001_name, Local_System_Name, 15);
812 else {
813 char *nodename = utsname()->nodename;
814 int n = strnlen(nodename, 15);
815 memset(vol->source_rfc1001_name, 0x20, 15);
816 for (i = 0; i < n; i++) {
817 /* does not have to be perfect mapping since field is
818 informational, only used for servers that do not support
819 port 445 and it can be overridden at mount time */
820 vol->source_rfc1001_name[i] = toupper(nodename[i]);
821 }
822 }
823 vol->source_rfc1001_name[15] = 0;
824 /* null target name indicates to use *SMBSERVR default called name
825 if we end up sending RFC1001 session initialize */
826 vol->target_rfc1001_name[0] = 0;
827 vol->linux_uid = current_uid(); /* use current_euid() instead? */
828 vol->linux_gid = current_gid();
829 vol->dir_mode = S_IRWXUGO;
830 /* 2767 perms indicate mandatory locking support */
831 vol->file_mode = (S_IRWXUGO | S_ISGID) & (~S_IXGRP);
832
833 /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */
834 vol->rw = true;
835 /* default is always to request posix paths. */
836 vol->posix_paths = 1;
837
838 if (!options)
839 return 1;
840
841 if (strncmp(options, "sep=", 4) == 0) {
842 if (options[4] != 0) {
843 separator[0] = options[4];
844 options += 5;
845 } else {
846 cFYI(1, ("Null separator not allowed"));
847 }
848 }
849
850 while ((data = strsep(&options, separator)) != NULL) {
851 if (!*data)
852 continue;
853 if ((value = strchr(data, '=')) != NULL)
854 *value++ = '\0';
855
856 /* Have to parse this before we parse for "user" */
857 if (strnicmp(data, "user_xattr", 10) == 0) {
858 vol->no_xattr = 0;
859 } else if (strnicmp(data, "nouser_xattr", 12) == 0) {
860 vol->no_xattr = 1;
861 } else if (strnicmp(data, "user", 4) == 0) {
862 if (!value) {
863 printk(KERN_WARNING
864 "CIFS: invalid or missing username\n");
865 return 1; /* needs_arg; */
866 } else if (!*value) {
867 /* null user, ie anonymous, authentication */
868 vol->nullauth = 1;
869 }
870 if (strnlen(value, 200) < 200) {
871 vol->username = value;
872 } else {
873 printk(KERN_WARNING "CIFS: username too long\n");
874 return 1;
875 }
876 } else if (strnicmp(data, "pass", 4) == 0) {
877 if (!value) {
878 vol->password = NULL;
879 continue;
880 } else if (value[0] == 0) {
881 /* check if string begins with double comma
882 since that would mean the password really
883 does start with a comma, and would not
884 indicate an empty string */
885 if (value[1] != separator[0]) {
886 vol->password = NULL;
887 continue;
888 }
889 }
890 temp_len = strlen(value);
891 /* removed password length check, NTLM passwords
892 can be arbitrarily long */
893
894 /* if comma in password, the string will be
895 prematurely null terminated. Commas in password are
896 specified across the cifs mount interface by a double
897 comma ie ,, and a comma used as in other cases ie ','
898 as a parameter delimiter/separator is single and due
899 to the strsep above is temporarily zeroed. */
900
901 /* NB: password legally can have multiple commas and
902 the only illegal character in a password is null */
903
904 if ((value[temp_len] == 0) &&
905 (value[temp_len+1] == separator[0])) {
906 /* reinsert comma */
907 value[temp_len] = separator[0];
908 temp_len += 2; /* move after second comma */
909 while (value[temp_len] != 0) {
910 if (value[temp_len] == separator[0]) {
911 if (value[temp_len+1] ==
912 separator[0]) {
913 /* skip second comma */
914 temp_len++;
915 } else {
916 /* single comma indicating start
917 of next parm */
918 break;
919 }
920 }
921 temp_len++;
922 }
923 if (value[temp_len] == 0) {
924 options = NULL;
925 } else {
926 value[temp_len] = 0;
927 /* point option to start of next parm */
928 options = value + temp_len + 1;
929 }
930 /* go from value to value + temp_len condensing
931 double commas to singles. Note that this ends up
932 allocating a few bytes too many, which is ok */
933 vol->password = kzalloc(temp_len, GFP_KERNEL);
934 if (vol->password == NULL) {
935 printk(KERN_WARNING "CIFS: no memory "
936 "for password\n");
937 return 1;
938 }
939 for (i = 0, j = 0; i < temp_len; i++, j++) {
940 vol->password[j] = value[i];
941 if (value[i] == separator[0]
942 && value[i+1] == separator[0]) {
943 /* skip second comma */
944 i++;
945 }
946 }
947 vol->password[j] = 0;
948 } else {
949 vol->password = kzalloc(temp_len+1, GFP_KERNEL);
950 if (vol->password == NULL) {
951 printk(KERN_WARNING "CIFS: no memory "
952 "for password\n");
953 return 1;
954 }
955 strcpy(vol->password, value);
956 }
957 } else if (strnicmp(data, "ip", 2) == 0) {
958 if (!value || !*value) {
959 vol->UNCip = NULL;
960 } else if (strnlen(value, 35) < 35) {
961 vol->UNCip = value;
962 } else {
963 printk(KERN_WARNING "CIFS: ip address "
964 "too long\n");
965 return 1;
966 }
967 } else if (strnicmp(data, "sec", 3) == 0) {
968 if (!value || !*value) {
969 cERROR(1, ("no security value specified"));
970 continue;
971 } else if (strnicmp(value, "krb5i", 5) == 0) {
972 vol->secFlg |= CIFSSEC_MAY_KRB5 |
973 CIFSSEC_MUST_SIGN;
974 } else if (strnicmp(value, "krb5p", 5) == 0) {
975 /* vol->secFlg |= CIFSSEC_MUST_SEAL |
976 CIFSSEC_MAY_KRB5; */
977 cERROR(1, ("Krb5 cifs privacy not supported"));
978 return 1;
979 } else if (strnicmp(value, "krb5", 4) == 0) {
980 vol->secFlg |= CIFSSEC_MAY_KRB5;
981 } else if (strnicmp(value, "ntlmv2i", 7) == 0) {
982 vol->secFlg |= CIFSSEC_MAY_NTLMV2 |
983 CIFSSEC_MUST_SIGN;
984 } else if (strnicmp(value, "ntlmv2", 6) == 0) {
985 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
986 } else if (strnicmp(value, "ntlmi", 5) == 0) {
987 vol->secFlg |= CIFSSEC_MAY_NTLM |
988 CIFSSEC_MUST_SIGN;
989 } else if (strnicmp(value, "ntlm", 4) == 0) {
990 /* ntlm is default so can be turned off too */
991 vol->secFlg |= CIFSSEC_MAY_NTLM;
992 } else if (strnicmp(value, "nontlm", 6) == 0) {
993 /* BB is there a better way to do this? */
994 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
995 #ifdef CONFIG_CIFS_WEAK_PW_HASH
996 } else if (strnicmp(value, "lanman", 6) == 0) {
997 vol->secFlg |= CIFSSEC_MAY_LANMAN;
998 #endif
999 } else if (strnicmp(value, "none", 4) == 0) {
1000 vol->nullauth = 1;
1001 } else {
1002 cERROR(1, ("bad security option: %s", value));
1003 return 1;
1004 }
1005 } else if ((strnicmp(data, "unc", 3) == 0)
1006 || (strnicmp(data, "target", 6) == 0)
1007 || (strnicmp(data, "path", 4) == 0)) {
1008 if (!value || !*value) {
1009 printk(KERN_WARNING "CIFS: invalid path to "
1010 "network resource\n");
1011 return 1; /* needs_arg; */
1012 }
1013 if ((temp_len = strnlen(value, 300)) < 300) {
1014 vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
1015 if (vol->UNC == NULL)
1016 return 1;
1017 strcpy(vol->UNC, value);
1018 if (strncmp(vol->UNC, "//", 2) == 0) {
1019 vol->UNC[0] = '\\';
1020 vol->UNC[1] = '\\';
1021 } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
1022 printk(KERN_WARNING
1023 "CIFS: UNC Path does not begin "
1024 "with // or \\\\ \n");
1025 return 1;
1026 }
1027 } else {
1028 printk(KERN_WARNING "CIFS: UNC name too long\n");
1029 return 1;
1030 }
1031 } else if ((strnicmp(data, "domain", 3) == 0)
1032 || (strnicmp(data, "workgroup", 5) == 0)) {
1033 if (!value || !*value) {
1034 printk(KERN_WARNING "CIFS: invalid domain name\n");
1035 return 1; /* needs_arg; */
1036 }
1037 /* BB are there cases in which a comma can be valid in
1038 a domain name and need special handling? */
1039 if (strnlen(value, 256) < 256) {
1040 vol->domainname = value;
1041 cFYI(1, ("Domain name set"));
1042 } else {
1043 printk(KERN_WARNING "CIFS: domain name too "
1044 "long\n");
1045 return 1;
1046 }
1047 } else if (strnicmp(data, "prefixpath", 10) == 0) {
1048 if (!value || !*value) {
1049 printk(KERN_WARNING
1050 "CIFS: invalid path prefix\n");
1051 return 1; /* needs_argument */
1052 }
1053 if ((temp_len = strnlen(value, 1024)) < 1024) {
1054 if (value[0] != '/')
1055 temp_len++; /* missing leading slash */
1056 vol->prepath = kmalloc(temp_len+1, GFP_KERNEL);
1057 if (vol->prepath == NULL)
1058 return 1;
1059 if (value[0] != '/') {
1060 vol->prepath[0] = '/';
1061 strcpy(vol->prepath+1, value);
1062 } else
1063 strcpy(vol->prepath, value);
1064 cFYI(1, ("prefix path %s", vol->prepath));
1065 } else {
1066 printk(KERN_WARNING "CIFS: prefix too long\n");
1067 return 1;
1068 }
1069 } else if (strnicmp(data, "iocharset", 9) == 0) {
1070 if (!value || !*value) {
1071 printk(KERN_WARNING "CIFS: invalid iocharset "
1072 "specified\n");
1073 return 1; /* needs_arg; */
1074 }
1075 if (strnlen(value, 65) < 65) {
1076 if (strnicmp(value, "default", 7))
1077 vol->iocharset = value;
1078 /* if iocharset not set then load_nls_default
1079 is used by caller */
1080 cFYI(1, ("iocharset set to %s", value));
1081 } else {
1082 printk(KERN_WARNING "CIFS: iocharset name "
1083 "too long.\n");
1084 return 1;
1085 }
1086 } else if (strnicmp(data, "uid", 3) == 0) {
1087 if (value && *value) {
1088 vol->linux_uid =
1089 simple_strtoul(value, &value, 0);
1090 vol->override_uid = 1;
1091 }
1092 } else if (strnicmp(data, "gid", 3) == 0) {
1093 if (value && *value) {
1094 vol->linux_gid =
1095 simple_strtoul(value, &value, 0);
1096 vol->override_gid = 1;
1097 }
1098 } else if (strnicmp(data, "file_mode", 4) == 0) {
1099 if (value && *value) {
1100 vol->file_mode =
1101 simple_strtoul(value, &value, 0);
1102 }
1103 } else if (strnicmp(data, "dir_mode", 4) == 0) {
1104 if (value && *value) {
1105 vol->dir_mode =
1106 simple_strtoul(value, &value, 0);
1107 }
1108 } else if (strnicmp(data, "dirmode", 4) == 0) {
1109 if (value && *value) {
1110 vol->dir_mode =
1111 simple_strtoul(value, &value, 0);
1112 }
1113 } else if (strnicmp(data, "port", 4) == 0) {
1114 if (value && *value) {
1115 vol->port =
1116 simple_strtoul(value, &value, 0);
1117 }
1118 } else if (strnicmp(data, "rsize", 5) == 0) {
1119 if (value && *value) {
1120 vol->rsize =
1121 simple_strtoul(value, &value, 0);
1122 }
1123 } else if (strnicmp(data, "wsize", 5) == 0) {
1124 if (value && *value) {
1125 vol->wsize =
1126 simple_strtoul(value, &value, 0);
1127 }
1128 } else if (strnicmp(data, "sockopt", 5) == 0) {
1129 if (value && *value) {
1130 vol->sockopt =
1131 simple_strtoul(value, &value, 0);
1132 }
1133 } else if (strnicmp(data, "netbiosname", 4) == 0) {
1134 if (!value || !*value || (*value == ' ')) {
1135 cFYI(1, ("invalid (empty) netbiosname"));
1136 } else {
1137 memset(vol->source_rfc1001_name, 0x20, 15);
1138 for (i = 0; i < 15; i++) {
1139 /* BB are there cases in which a comma can be
1140 valid in this workstation netbios name (and need
1141 special handling)? */
1142
1143 /* We do not uppercase netbiosname for user */
1144 if (value[i] == 0)
1145 break;
1146 else
1147 vol->source_rfc1001_name[i] =
1148 value[i];
1149 }
1150 /* The string has 16th byte zero still from
1151 set at top of the function */
1152 if ((i == 15) && (value[i] != 0))
1153 printk(KERN_WARNING "CIFS: netbiosname"
1154 " longer than 15 truncated.\n");
1155 }
1156 } else if (strnicmp(data, "servern", 7) == 0) {
1157 /* servernetbiosname specified override *SMBSERVER */
1158 if (!value || !*value || (*value == ' ')) {
1159 cFYI(1, ("empty server netbiosname specified"));
1160 } else {
1161 /* last byte, type, is 0x20 for servr type */
1162 memset(vol->target_rfc1001_name, 0x20, 16);
1163
1164 for (i = 0; i < 15; i++) {
1165 /* BB are there cases in which a comma can be
1166 valid in this workstation netbios name
1167 (and need special handling)? */
1168
1169 /* user or mount helper must uppercase
1170 the netbiosname */
1171 if (value[i] == 0)
1172 break;
1173 else
1174 vol->target_rfc1001_name[i] =
1175 value[i];
1176 }
1177 /* The string has 16th byte zero still from
1178 set at top of the function */
1179 if ((i == 15) && (value[i] != 0))
1180 printk(KERN_WARNING "CIFS: server net"
1181 "biosname longer than 15 truncated.\n");
1182 }
1183 } else if (strnicmp(data, "credentials", 4) == 0) {
1184 /* ignore */
1185 } else if (strnicmp(data, "version", 3) == 0) {
1186 /* ignore */
1187 } else if (strnicmp(data, "guest", 5) == 0) {
1188 /* ignore */
1189 } else if (strnicmp(data, "rw", 2) == 0) {
1190 vol->rw = true;
1191 } else if (strnicmp(data, "noblocksend", 11) == 0) {
1192 vol->noblocksnd = 1;
1193 } else if (strnicmp(data, "noautotune", 10) == 0) {
1194 vol->noautotune = 1;
1195 } else if ((strnicmp(data, "suid", 4) == 0) ||
1196 (strnicmp(data, "nosuid", 6) == 0) ||
1197 (strnicmp(data, "exec", 4) == 0) ||
1198 (strnicmp(data, "noexec", 6) == 0) ||
1199 (strnicmp(data, "nodev", 5) == 0) ||
1200 (strnicmp(data, "noauto", 6) == 0) ||
1201 (strnicmp(data, "dev", 3) == 0)) {
1202 /* The mount tool or mount.cifs helper (if present)
1203 uses these opts to set flags, and the flags are read
1204 by the kernel vfs layer before we get here (ie
1205 before read super) so there is no point trying to
1206 parse these options again and set anything and it
1207 is ok to just ignore them */
1208 continue;
1209 } else if (strnicmp(data, "ro", 2) == 0) {
1210 vol->rw = false;
1211 } else if (strnicmp(data, "hard", 4) == 0) {
1212 vol->retry = 1;
1213 } else if (strnicmp(data, "soft", 4) == 0) {
1214 vol->retry = 0;
1215 } else if (strnicmp(data, "perm", 4) == 0) {
1216 vol->noperm = 0;
1217 } else if (strnicmp(data, "noperm", 6) == 0) {
1218 vol->noperm = 1;
1219 } else if (strnicmp(data, "mapchars", 8) == 0) {
1220 vol->remap = 1;
1221 } else if (strnicmp(data, "nomapchars", 10) == 0) {
1222 vol->remap = 0;
1223 } else if (strnicmp(data, "sfu", 3) == 0) {
1224 vol->sfu_emul = 1;
1225 } else if (strnicmp(data, "nosfu", 5) == 0) {
1226 vol->sfu_emul = 0;
1227 } else if (strnicmp(data, "nodfs", 5) == 0) {
1228 vol->nodfs = 1;
1229 } else if (strnicmp(data, "posixpaths", 10) == 0) {
1230 vol->posix_paths = 1;
1231 } else if (strnicmp(data, "noposixpaths", 12) == 0) {
1232 vol->posix_paths = 0;
1233 } else if (strnicmp(data, "nounix", 6) == 0) {
1234 vol->no_linux_ext = 1;
1235 } else if (strnicmp(data, "nolinux", 7) == 0) {
1236 vol->no_linux_ext = 1;
1237 } else if ((strnicmp(data, "nocase", 6) == 0) ||
1238 (strnicmp(data, "ignorecase", 10) == 0)) {
1239 vol->nocase = 1;
1240 } else if (strnicmp(data, "brl", 3) == 0) {
1241 vol->nobrl = 0;
1242 } else if ((strnicmp(data, "nobrl", 5) == 0) ||
1243 (strnicmp(data, "nolock", 6) == 0)) {
1244 vol->nobrl = 1;
1245 /* turn off mandatory locking in mode
1246 if remote locking is turned off since the
1247 local vfs will do advisory */
1248 if (vol->file_mode ==
1249 (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
1250 vol->file_mode = S_IALLUGO;
1251 } else if (strnicmp(data, "forcemandatorylock", 9) == 0) {
1252 /* will take the shorter form "forcemand" as well */
1253 /* This mount option will force use of mandatory
1254 (DOS/Windows style) byte range locks, instead of
1255 using posix advisory byte range locks, even if the
1256 Unix extensions are available and posix locks would
1257 be supported otherwise. If Unix extensions are not
1258 negotiated this has no effect since mandatory locks
1259 would be used (mandatory locks is all that those
1260 those servers support) */
1261 vol->mand_lock = 1;
1262 } else if (strnicmp(data, "setuids", 7) == 0) {
1263 vol->setuids = 1;
1264 } else if (strnicmp(data, "nosetuids", 9) == 0) {
1265 vol->setuids = 0;
1266 } else if (strnicmp(data, "dynperm", 7) == 0) {
1267 vol->dynperm = true;
1268 } else if (strnicmp(data, "nodynperm", 9) == 0) {
1269 vol->dynperm = false;
1270 } else if (strnicmp(data, "nohard", 6) == 0) {
1271 vol->retry = 0;
1272 } else if (strnicmp(data, "nosoft", 6) == 0) {
1273 vol->retry = 1;
1274 } else if (strnicmp(data, "nointr", 6) == 0) {
1275 vol->intr = 0;
1276 } else if (strnicmp(data, "intr", 4) == 0) {
1277 vol->intr = 1;
1278 } else if (strnicmp(data, "nostrictsync", 12) == 0) {
1279 vol->nostrictsync = 1;
1280 } else if (strnicmp(data, "strictsync", 10) == 0) {
1281 vol->nostrictsync = 0;
1282 } else if (strnicmp(data, "serverino", 7) == 0) {
1283 vol->server_ino = 1;
1284 } else if (strnicmp(data, "noserverino", 9) == 0) {
1285 vol->server_ino = 0;
1286 } else if (strnicmp(data, "cifsacl", 7) == 0) {
1287 vol->cifs_acl = 1;
1288 } else if (strnicmp(data, "nocifsacl", 9) == 0) {
1289 vol->cifs_acl = 0;
1290 } else if (strnicmp(data, "acl", 3) == 0) {
1291 vol->no_psx_acl = 0;
1292 } else if (strnicmp(data, "noacl", 5) == 0) {
1293 vol->no_psx_acl = 1;
1294 #ifdef CONFIG_CIFS_EXPERIMENTAL
1295 } else if (strnicmp(data, "locallease", 6) == 0) {
1296 vol->local_lease = 1;
1297 #endif
1298 } else if (strnicmp(data, "sign", 4) == 0) {
1299 vol->secFlg |= CIFSSEC_MUST_SIGN;
1300 } else if (strnicmp(data, "seal", 4) == 0) {
1301 /* we do not do the following in secFlags because seal
1302 is a per tree connection (mount) not a per socket
1303 or per-smb connection option in the protocol */
1304 /* vol->secFlg |= CIFSSEC_MUST_SEAL; */
1305 vol->seal = 1;
1306 } else if (strnicmp(data, "direct", 6) == 0) {
1307 vol->direct_io = 1;
1308 } else if (strnicmp(data, "forcedirectio", 13) == 0) {
1309 vol->direct_io = 1;
1310 } else if (strnicmp(data, "in6_addr", 8) == 0) {
1311 if (!value || !*value) {
1312 vol->in6_addr = NULL;
1313 } else if (strnlen(value, 49) == 48) {
1314 vol->in6_addr = value;
1315 } else {
1316 printk(KERN_WARNING "CIFS: ip v6 address not "
1317 "48 characters long\n");
1318 return 1;
1319 }
1320 } else if (strnicmp(data, "noac", 4) == 0) {
1321 printk(KERN_WARNING "CIFS: Mount option noac not "
1322 "supported. Instead set "
1323 "/proc/fs/cifs/LookupCacheEnabled to 0\n");
1324 } else
1325 printk(KERN_WARNING "CIFS: Unknown mount option %s\n",
1326 data);
1327 }
1328 if (vol->UNC == NULL) {
1329 if (devname == NULL) {
1330 printk(KERN_WARNING "CIFS: Missing UNC name for mount "
1331 "target\n");
1332 return 1;
1333 }
1334 if ((temp_len = strnlen(devname, 300)) < 300) {
1335 vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
1336 if (vol->UNC == NULL)
1337 return 1;
1338 strcpy(vol->UNC, devname);
1339 if (strncmp(vol->UNC, "//", 2) == 0) {
1340 vol->UNC[0] = '\\';
1341 vol->UNC[1] = '\\';
1342 } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
1343 printk(KERN_WARNING "CIFS: UNC Path does not "
1344 "begin with // or \\\\ \n");
1345 return 1;
1346 }
1347 value = strpbrk(vol->UNC+2, "/\\");
1348 if (value)
1349 *value = '\\';
1350 } else {
1351 printk(KERN_WARNING "CIFS: UNC name too long\n");
1352 return 1;
1353 }
1354 }
1355 if (vol->UNCip == NULL)
1356 vol->UNCip = &vol->UNC[2];
1357
1358 return 0;
1359 }
1360
1361 static struct TCP_Server_Info *
1362 cifs_find_tcp_session(struct sockaddr_storage *addr)
1363 {
1364 struct list_head *tmp;
1365 struct TCP_Server_Info *server;
1366 struct sockaddr_in *addr4 = (struct sockaddr_in *) addr;
1367 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *) addr;
1368
1369 write_lock(&cifs_tcp_ses_lock);
1370 list_for_each(tmp, &cifs_tcp_ses_list) {
1371 server = list_entry(tmp, struct TCP_Server_Info,
1372 tcp_ses_list);
1373 /*
1374 * the demux thread can exit on its own while still in CifsNew
1375 * so don't accept any sockets in that state. Since the
1376 * tcpStatus never changes back to CifsNew it's safe to check
1377 * for this without a lock.
1378 */
1379 if (server->tcpStatus == CifsNew)
1380 continue;
1381
1382 if (addr->ss_family == AF_INET &&
1383 (addr4->sin_addr.s_addr !=
1384 server->addr.sockAddr.sin_addr.s_addr))
1385 continue;
1386 else if (addr->ss_family == AF_INET6 &&
1387 !ipv6_addr_equal(&server->addr.sockAddr6.sin6_addr,
1388 &addr6->sin6_addr))
1389 continue;
1390
1391 ++server->srv_count;
1392 write_unlock(&cifs_tcp_ses_lock);
1393 cFYI(1, ("Existing tcp session with server found"));
1394 return server;
1395 }
1396 write_unlock(&cifs_tcp_ses_lock);
1397 return NULL;
1398 }
1399
1400 static void
1401 cifs_put_tcp_session(struct TCP_Server_Info *server)
1402 {
1403 struct task_struct *task;
1404
1405 write_lock(&cifs_tcp_ses_lock);
1406 if (--server->srv_count > 0) {
1407 write_unlock(&cifs_tcp_ses_lock);
1408 return;
1409 }
1410
1411 list_del_init(&server->tcp_ses_list);
1412 write_unlock(&cifs_tcp_ses_lock);
1413
1414 spin_lock(&GlobalMid_Lock);
1415 server->tcpStatus = CifsExiting;
1416 spin_unlock(&GlobalMid_Lock);
1417
1418 task = xchg(&server->tsk, NULL);
1419 if (task)
1420 force_sig(SIGKILL, task);
1421 }
1422
1423 static struct TCP_Server_Info *
1424 cifs_get_tcp_session(struct smb_vol *volume_info)
1425 {
1426 struct TCP_Server_Info *tcp_ses = NULL;
1427 struct sockaddr_storage addr;
1428 struct sockaddr_in *sin_server = (struct sockaddr_in *) &addr;
1429 struct sockaddr_in6 *sin_server6 = (struct sockaddr_in6 *) &addr;
1430 int rc;
1431
1432 memset(&addr, 0, sizeof(struct sockaddr_storage));
1433
1434 if (volume_info->UNCip && volume_info->UNC) {
1435 rc = cifs_inet_pton(AF_INET, volume_info->UNCip,
1436 &sin_server->sin_addr.s_addr);
1437
1438 if (rc <= 0) {
1439 /* not ipv4 address, try ipv6 */
1440 rc = cifs_inet_pton(AF_INET6, volume_info->UNCip,
1441 &sin_server6->sin6_addr.in6_u);
1442 if (rc > 0)
1443 addr.ss_family = AF_INET6;
1444 } else {
1445 addr.ss_family = AF_INET;
1446 }
1447
1448 if (rc <= 0) {
1449 /* we failed translating address */
1450 rc = -EINVAL;
1451 goto out_err;
1452 }
1453
1454 cFYI(1, ("UNC: %s ip: %s", volume_info->UNC,
1455 volume_info->UNCip));
1456 } else if (volume_info->UNCip) {
1457 /* BB using ip addr as tcp_ses name to connect to the
1458 DFS root below */
1459 cERROR(1, ("Connecting to DFS root not implemented yet"));
1460 rc = -EINVAL;
1461 goto out_err;
1462 } else /* which tcp_sess DFS root would we conect to */ {
1463 cERROR(1,
1464 ("CIFS mount error: No UNC path (e.g. -o "
1465 "unc=//192.168.1.100/public) specified"));
1466 rc = -EINVAL;
1467 goto out_err;
1468 }
1469
1470 /* see if we already have a matching tcp_ses */
1471 tcp_ses = cifs_find_tcp_session(&addr);
1472 if (tcp_ses)
1473 return tcp_ses;
1474
1475 tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL);
1476 if (!tcp_ses) {
1477 rc = -ENOMEM;
1478 goto out_err;
1479 }
1480
1481 tcp_ses->hostname = extract_hostname(volume_info->UNC);
1482 if (IS_ERR(tcp_ses->hostname)) {
1483 rc = PTR_ERR(tcp_ses->hostname);
1484 goto out_err;
1485 }
1486
1487 tcp_ses->noblocksnd = volume_info->noblocksnd;
1488 tcp_ses->noautotune = volume_info->noautotune;
1489 atomic_set(&tcp_ses->inFlight, 0);
1490 init_waitqueue_head(&tcp_ses->response_q);
1491 init_waitqueue_head(&tcp_ses->request_q);
1492 INIT_LIST_HEAD(&tcp_ses->pending_mid_q);
1493 mutex_init(&tcp_ses->srv_mutex);
1494 memcpy(tcp_ses->workstation_RFC1001_name,
1495 volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
1496 memcpy(tcp_ses->server_RFC1001_name,
1497 volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
1498 tcp_ses->sequence_number = 0;
1499 INIT_LIST_HEAD(&tcp_ses->tcp_ses_list);
1500 INIT_LIST_HEAD(&tcp_ses->smb_ses_list);
1501
1502 /*
1503 * at this point we are the only ones with the pointer
1504 * to the struct since the kernel thread not created yet
1505 * no need to spinlock this init of tcpStatus or srv_count
1506 */
1507 tcp_ses->tcpStatus = CifsNew;
1508 ++tcp_ses->srv_count;
1509
1510 if (addr.ss_family == AF_INET6) {
1511 cFYI(1, ("attempting ipv6 connect"));
1512 /* BB should we allow ipv6 on port 139? */
1513 /* other OS never observed in Wild doing 139 with v6 */
1514 memcpy(&tcp_ses->addr.sockAddr6, sin_server6,
1515 sizeof(struct sockaddr_in6));
1516 sin_server6->sin6_port = htons(volume_info->port);
1517 rc = ipv6_connect(tcp_ses);
1518 } else {
1519 memcpy(&tcp_ses->addr.sockAddr, sin_server,
1520 sizeof(struct sockaddr_in));
1521 sin_server->sin_port = htons(volume_info->port);
1522 rc = ipv4_connect(tcp_ses);
1523 }
1524 if (rc < 0) {
1525 cERROR(1, ("Error connecting to socket. Aborting operation"));
1526 goto out_err;
1527 }
1528
1529 /*
1530 * since we're in a cifs function already, we know that
1531 * this will succeed. No need for try_module_get().
1532 */
1533 __module_get(THIS_MODULE);
1534 tcp_ses->tsk = kthread_run((void *)(void *)cifs_demultiplex_thread,
1535 tcp_ses, "cifsd");
1536 if (IS_ERR(tcp_ses->tsk)) {
1537 rc = PTR_ERR(tcp_ses->tsk);
1538 cERROR(1, ("error %d create cifsd thread", rc));
1539 module_put(THIS_MODULE);
1540 goto out_err;
1541 }
1542
1543 /* thread spawned, put it on the list */
1544 write_lock(&cifs_tcp_ses_lock);
1545 list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list);
1546 write_unlock(&cifs_tcp_ses_lock);
1547
1548 return tcp_ses;
1549
1550 out_err:
1551 if (tcp_ses) {
1552 kfree(tcp_ses->hostname);
1553 if (tcp_ses->ssocket)
1554 sock_release(tcp_ses->ssocket);
1555 kfree(tcp_ses);
1556 }
1557 return ERR_PTR(rc);
1558 }
1559
1560 static struct cifsSesInfo *
1561 cifs_find_smb_ses(struct TCP_Server_Info *server, char *username)
1562 {
1563 struct list_head *tmp;
1564 struct cifsSesInfo *ses;
1565
1566 write_lock(&cifs_tcp_ses_lock);
1567 list_for_each(tmp, &server->smb_ses_list) {
1568 ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list);
1569 if (strncmp(ses->userName, username, MAX_USERNAME_SIZE))
1570 continue;
1571
1572 ++ses->ses_count;
1573 write_unlock(&cifs_tcp_ses_lock);
1574 return ses;
1575 }
1576 write_unlock(&cifs_tcp_ses_lock);
1577 return NULL;
1578 }
1579
1580 static void
1581 cifs_put_smb_ses(struct cifsSesInfo *ses)
1582 {
1583 int xid;
1584 struct TCP_Server_Info *server = ses->server;
1585
1586 write_lock(&cifs_tcp_ses_lock);
1587 if (--ses->ses_count > 0) {
1588 write_unlock(&cifs_tcp_ses_lock);
1589 return;
1590 }
1591
1592 list_del_init(&ses->smb_ses_list);
1593 write_unlock(&cifs_tcp_ses_lock);
1594
1595 if (ses->status == CifsGood) {
1596 xid = GetXid();
1597 CIFSSMBLogoff(xid, ses);
1598 _FreeXid(xid);
1599 }
1600 sesInfoFree(ses);
1601 cifs_put_tcp_session(server);
1602 }
1603
1604 static struct cifsTconInfo *
1605 cifs_find_tcon(struct cifsSesInfo *ses, const char *unc)
1606 {
1607 struct list_head *tmp;
1608 struct cifsTconInfo *tcon;
1609
1610 write_lock(&cifs_tcp_ses_lock);
1611 list_for_each(tmp, &ses->tcon_list) {
1612 tcon = list_entry(tmp, struct cifsTconInfo, tcon_list);
1613 if (tcon->tidStatus == CifsExiting)
1614 continue;
1615 if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE))
1616 continue;
1617
1618 ++tcon->tc_count;
1619 write_unlock(&cifs_tcp_ses_lock);
1620 return tcon;
1621 }
1622 write_unlock(&cifs_tcp_ses_lock);
1623 return NULL;
1624 }
1625
1626 static void
1627 cifs_put_tcon(struct cifsTconInfo *tcon)
1628 {
1629 int xid;
1630 struct cifsSesInfo *ses = tcon->ses;
1631
1632 write_lock(&cifs_tcp_ses_lock);
1633 if (--tcon->tc_count > 0) {
1634 write_unlock(&cifs_tcp_ses_lock);
1635 return;
1636 }
1637
1638 list_del_init(&tcon->tcon_list);
1639 write_unlock(&cifs_tcp_ses_lock);
1640
1641 xid = GetXid();
1642 CIFSSMBTDis(xid, tcon);
1643 _FreeXid(xid);
1644
1645 DeleteTconOplockQEntries(tcon);
1646 tconInfoFree(tcon);
1647 cifs_put_smb_ses(ses);
1648 }
1649
1650 int
1651 get_dfs_path(int xid, struct cifsSesInfo *pSesInfo, const char *old_path,
1652 const struct nls_table *nls_codepage, unsigned int *pnum_referrals,
1653 struct dfs_info3_param **preferrals, int remap)
1654 {
1655 char *temp_unc;
1656 int rc = 0;
1657
1658 *pnum_referrals = 0;
1659 *preferrals = NULL;
1660
1661 if (pSesInfo->ipc_tid == 0) {
1662 temp_unc = kmalloc(2 /* for slashes */ +
1663 strnlen(pSesInfo->serverName,
1664 SERVER_NAME_LEN_WITH_NULL * 2)
1665 + 1 + 4 /* slash IPC$ */ + 2,
1666 GFP_KERNEL);
1667 if (temp_unc == NULL)
1668 return -ENOMEM;
1669 temp_unc[0] = '\\';
1670 temp_unc[1] = '\\';
1671 strcpy(temp_unc + 2, pSesInfo->serverName);
1672 strcpy(temp_unc + 2 + strlen(pSesInfo->serverName), "\\IPC$");
1673 rc = CIFSTCon(xid, pSesInfo, temp_unc, NULL, nls_codepage);
1674 cFYI(1,
1675 ("CIFS Tcon rc = %d ipc_tid = %d", rc, pSesInfo->ipc_tid));
1676 kfree(temp_unc);
1677 }
1678 if (rc == 0)
1679 rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, preferrals,
1680 pnum_referrals, nls_codepage, remap);
1681 /* BB map targetUNCs to dfs_info3 structures, here or
1682 in CIFSGetDFSRefer BB */
1683
1684 return rc;
1685 }
1686
1687 #ifdef CONFIG_DEBUG_LOCK_ALLOC
1688 static struct lock_class_key cifs_key[2];
1689 static struct lock_class_key cifs_slock_key[2];
1690
1691 static inline void
1692 cifs_reclassify_socket4(struct socket *sock)
1693 {
1694 struct sock *sk = sock->sk;
1695 BUG_ON(sock_owned_by_user(sk));
1696 sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS",
1697 &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]);
1698 }
1699
1700 static inline void
1701 cifs_reclassify_socket6(struct socket *sock)
1702 {
1703 struct sock *sk = sock->sk;
1704 BUG_ON(sock_owned_by_user(sk));
1705 sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS",
1706 &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]);
1707 }
1708 #else
1709 static inline void
1710 cifs_reclassify_socket4(struct socket *sock)
1711 {
1712 }
1713
1714 static inline void
1715 cifs_reclassify_socket6(struct socket *sock)
1716 {
1717 }
1718 #endif
1719
1720 /* See RFC1001 section 14 on representation of Netbios names */
1721 static void rfc1002mangle(char *target, char *source, unsigned int length)
1722 {
1723 unsigned int i, j;
1724
1725 for (i = 0, j = 0; i < (length); i++) {
1726 /* mask a nibble at a time and encode */
1727 target[j] = 'A' + (0x0F & (source[i] >> 4));
1728 target[j+1] = 'A' + (0x0F & source[i]);
1729 j += 2;
1730 }
1731
1732 }
1733
1734
1735 static int
1736 ipv4_connect(struct TCP_Server_Info *server)
1737 {
1738 int rc = 0;
1739 bool connected = false;
1740 __be16 orig_port = 0;
1741 struct socket *socket = server->ssocket;
1742
1743 if (socket == NULL) {
1744 rc = sock_create_kern(PF_INET, SOCK_STREAM,
1745 IPPROTO_TCP, &socket);
1746 if (rc < 0) {
1747 cERROR(1, ("Error %d creating socket", rc));
1748 return rc;
1749 }
1750
1751 /* BB other socket options to set KEEPALIVE, NODELAY? */
1752 cFYI(1, ("Socket created"));
1753 server->ssocket = socket;
1754 socket->sk->sk_allocation = GFP_NOFS;
1755 cifs_reclassify_socket4(socket);
1756 }
1757
1758 /* user overrode default port */
1759 if (server->addr.sockAddr.sin_port) {
1760 rc = socket->ops->connect(socket, (struct sockaddr *)
1761 &server->addr.sockAddr,
1762 sizeof(struct sockaddr_in), 0);
1763 if (rc >= 0)
1764 connected = true;
1765 }
1766
1767 if (!connected) {
1768 /* save original port so we can retry user specified port
1769 later if fall back ports fail this time */
1770 orig_port = server->addr.sockAddr.sin_port;
1771
1772 /* do not retry on the same port we just failed on */
1773 if (server->addr.sockAddr.sin_port != htons(CIFS_PORT)) {
1774 server->addr.sockAddr.sin_port = htons(CIFS_PORT);
1775 rc = socket->ops->connect(socket,
1776 (struct sockaddr *)
1777 &server->addr.sockAddr,
1778 sizeof(struct sockaddr_in), 0);
1779 if (rc >= 0)
1780 connected = true;
1781 }
1782 }
1783 if (!connected) {
1784 server->addr.sockAddr.sin_port = htons(RFC1001_PORT);
1785 rc = socket->ops->connect(socket, (struct sockaddr *)
1786 &server->addr.sockAddr,
1787 sizeof(struct sockaddr_in), 0);
1788 if (rc >= 0)
1789 connected = true;
1790 }
1791
1792 /* give up here - unless we want to retry on different
1793 protocol families some day */
1794 if (!connected) {
1795 if (orig_port)
1796 server->addr.sockAddr.sin_port = orig_port;
1797 cFYI(1, ("Error %d connecting to server via ipv4", rc));
1798 sock_release(socket);
1799 server->ssocket = NULL;
1800 return rc;
1801 }
1802
1803
1804 /*
1805 * Eventually check for other socket options to change from
1806 * the default. sock_setsockopt not used because it expects
1807 * user space buffer
1808 */
1809 socket->sk->sk_rcvtimeo = 7 * HZ;
1810 socket->sk->sk_sndtimeo = 5 * HZ;
1811
1812 /* make the bufsizes depend on wsize/rsize and max requests */
1813 if (server->noautotune) {
1814 if (socket->sk->sk_sndbuf < (200 * 1024))
1815 socket->sk->sk_sndbuf = 200 * 1024;
1816 if (socket->sk->sk_rcvbuf < (140 * 1024))
1817 socket->sk->sk_rcvbuf = 140 * 1024;
1818 }
1819
1820 cFYI(1, ("sndbuf %d rcvbuf %d rcvtimeo 0x%lx",
1821 socket->sk->sk_sndbuf,
1822 socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo));
1823
1824 /* send RFC1001 sessinit */
1825 if (server->addr.sockAddr.sin_port == htons(RFC1001_PORT)) {
1826 /* some servers require RFC1001 sessinit before sending
1827 negprot - BB check reconnection in case where second
1828 sessinit is sent but no second negprot */
1829 struct rfc1002_session_packet *ses_init_buf;
1830 struct smb_hdr *smb_buf;
1831 ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet),
1832 GFP_KERNEL);
1833 if (ses_init_buf) {
1834 ses_init_buf->trailer.session_req.called_len = 32;
1835 if (server->server_RFC1001_name &&
1836 server->server_RFC1001_name[0] != 0)
1837 rfc1002mangle(ses_init_buf->trailer.
1838 session_req.called_name,
1839 server->server_RFC1001_name,
1840 RFC1001_NAME_LEN_WITH_NULL);
1841 else
1842 rfc1002mangle(ses_init_buf->trailer.
1843 session_req.called_name,
1844 DEFAULT_CIFS_CALLED_NAME,
1845 RFC1001_NAME_LEN_WITH_NULL);
1846
1847 ses_init_buf->trailer.session_req.calling_len = 32;
1848
1849 /* calling name ends in null (byte 16) from old smb
1850 convention. */
1851 if (server->workstation_RFC1001_name &&
1852 server->workstation_RFC1001_name[0] != 0)
1853 rfc1002mangle(ses_init_buf->trailer.
1854 session_req.calling_name,
1855 server->workstation_RFC1001_name,
1856 RFC1001_NAME_LEN_WITH_NULL);
1857 else
1858 rfc1002mangle(ses_init_buf->trailer.
1859 session_req.calling_name,
1860 "LINUX_CIFS_CLNT",
1861 RFC1001_NAME_LEN_WITH_NULL);
1862
1863 ses_init_buf->trailer.session_req.scope1 = 0;
1864 ses_init_buf->trailer.session_req.scope2 = 0;
1865 smb_buf = (struct smb_hdr *)ses_init_buf;
1866 /* sizeof RFC1002_SESSION_REQUEST with no scope */
1867 smb_buf->smb_buf_length = 0x81000044;
1868 rc = smb_send(server, smb_buf, 0x44);
1869 kfree(ses_init_buf);
1870 msleep(1); /* RFC1001 layer in at least one server
1871 requires very short break before negprot
1872 presumably because not expecting negprot
1873 to follow so fast. This is a simple
1874 solution that works without
1875 complicating the code and causes no
1876 significant slowing down on mount
1877 for everyone else */
1878 }
1879 /* else the negprot may still work without this
1880 even though malloc failed */
1881
1882 }
1883
1884 return rc;
1885 }
1886
1887 static int
1888 ipv6_connect(struct TCP_Server_Info *server)
1889 {
1890 int rc = 0;
1891 bool connected = false;
1892 __be16 orig_port = 0;
1893 struct socket *socket = server->ssocket;
1894
1895 if (socket == NULL) {
1896 rc = sock_create_kern(PF_INET6, SOCK_STREAM,
1897 IPPROTO_TCP, &socket);
1898 if (rc < 0) {
1899 cERROR(1, ("Error %d creating ipv6 socket", rc));
1900 socket = NULL;
1901 return rc;
1902 }
1903
1904 /* BB other socket options to set KEEPALIVE, NODELAY? */
1905 cFYI(1, ("ipv6 Socket created"));
1906 server->ssocket = socket;
1907 socket->sk->sk_allocation = GFP_NOFS;
1908 cifs_reclassify_socket6(socket);
1909 }
1910
1911 /* user overrode default port */
1912 if (server->addr.sockAddr6.sin6_port) {
1913 rc = socket->ops->connect(socket,
1914 (struct sockaddr *) &server->addr.sockAddr6,
1915 sizeof(struct sockaddr_in6), 0);
1916 if (rc >= 0)
1917 connected = true;
1918 }
1919
1920 if (!connected) {
1921 /* save original port so we can retry user specified port
1922 later if fall back ports fail this time */
1923
1924 orig_port = server->addr.sockAddr6.sin6_port;
1925 /* do not retry on the same port we just failed on */
1926 if (server->addr.sockAddr6.sin6_port != htons(CIFS_PORT)) {
1927 server->addr.sockAddr6.sin6_port = htons(CIFS_PORT);
1928 rc = socket->ops->connect(socket, (struct sockaddr *)
1929 &server->addr.sockAddr6,
1930 sizeof(struct sockaddr_in6), 0);
1931 if (rc >= 0)
1932 connected = true;
1933 }
1934 }
1935 if (!connected) {
1936 server->addr.sockAddr6.sin6_port = htons(RFC1001_PORT);
1937 rc = socket->ops->connect(socket, (struct sockaddr *)
1938 &server->addr.sockAddr6,
1939 sizeof(struct sockaddr_in6), 0);
1940 if (rc >= 0)
1941 connected = true;
1942 }
1943
1944 /* give up here - unless we want to retry on different
1945 protocol families some day */
1946 if (!connected) {
1947 if (orig_port)
1948 server->addr.sockAddr6.sin6_port = orig_port;
1949 cFYI(1, ("Error %d connecting to server via ipv6", rc));
1950 sock_release(socket);
1951 server->ssocket = NULL;
1952 return rc;
1953 }
1954
1955 /*
1956 * Eventually check for other socket options to change from
1957 * the default. sock_setsockopt not used because it expects
1958 * user space buffer
1959 */
1960 socket->sk->sk_rcvtimeo = 7 * HZ;
1961 socket->sk->sk_sndtimeo = 5 * HZ;
1962 server->ssocket = socket;
1963
1964 return rc;
1965 }
1966
1967 void reset_cifs_unix_caps(int xid, struct cifsTconInfo *tcon,
1968 struct super_block *sb, struct smb_vol *vol_info)
1969 {
1970 /* if we are reconnecting then should we check to see if
1971 * any requested capabilities changed locally e.g. via
1972 * remount but we can not do much about it here
1973 * if they have (even if we could detect it by the following)
1974 * Perhaps we could add a backpointer to array of sb from tcon
1975 * or if we change to make all sb to same share the same
1976 * sb as NFS - then we only have one backpointer to sb.
1977 * What if we wanted to mount the server share twice once with
1978 * and once without posixacls or posix paths? */
1979 __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
1980
1981 if (vol_info && vol_info->no_linux_ext) {
1982 tcon->fsUnixInfo.Capability = 0;
1983 tcon->unix_ext = 0; /* Unix Extensions disabled */
1984 cFYI(1, ("Linux protocol extensions disabled"));
1985 return;
1986 } else if (vol_info)
1987 tcon->unix_ext = 1; /* Unix Extensions supported */
1988
1989 if (tcon->unix_ext == 0) {
1990 cFYI(1, ("Unix extensions disabled so not set on reconnect"));
1991 return;
1992 }
1993
1994 if (!CIFSSMBQFSUnixInfo(xid, tcon)) {
1995 __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
1996
1997 /* check for reconnect case in which we do not
1998 want to change the mount behavior if we can avoid it */
1999 if (vol_info == NULL) {
2000 /* turn off POSIX ACL and PATHNAMES if not set
2001 originally at mount time */
2002 if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0)
2003 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
2004 if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
2005 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
2006 cERROR(1, ("POSIXPATH support change"));
2007 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
2008 } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
2009 cERROR(1, ("possible reconnect error"));
2010 cERROR(1,
2011 ("server disabled POSIX path support"));
2012 }
2013 }
2014
2015 cap &= CIFS_UNIX_CAP_MASK;
2016 if (vol_info && vol_info->no_psx_acl)
2017 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
2018 else if (CIFS_UNIX_POSIX_ACL_CAP & cap) {
2019 cFYI(1, ("negotiated posix acl support"));
2020 if (sb)
2021 sb->s_flags |= MS_POSIXACL;
2022 }
2023
2024 if (vol_info && vol_info->posix_paths == 0)
2025 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
2026 else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
2027 cFYI(1, ("negotiate posix pathnames"));
2028 if (sb)
2029 CIFS_SB(sb)->mnt_cifs_flags |=
2030 CIFS_MOUNT_POSIX_PATHS;
2031 }
2032
2033 /* We might be setting the path sep back to a different
2034 form if we are reconnecting and the server switched its
2035 posix path capability for this share */
2036 if (sb && (CIFS_SB(sb)->prepathlen > 0))
2037 CIFS_SB(sb)->prepath[0] = CIFS_DIR_SEP(CIFS_SB(sb));
2038
2039 if (sb && (CIFS_SB(sb)->rsize > 127 * 1024)) {
2040 if ((cap & CIFS_UNIX_LARGE_READ_CAP) == 0) {
2041 CIFS_SB(sb)->rsize = 127 * 1024;
2042 cFYI(DBG2,
2043 ("larger reads not supported by srv"));
2044 }
2045 }
2046
2047
2048 cFYI(1, ("Negotiate caps 0x%x", (int)cap));
2049 #ifdef CONFIG_CIFS_DEBUG2
2050 if (cap & CIFS_UNIX_FCNTL_CAP)
2051 cFYI(1, ("FCNTL cap"));
2052 if (cap & CIFS_UNIX_EXTATTR_CAP)
2053 cFYI(1, ("EXTATTR cap"));
2054 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
2055 cFYI(1, ("POSIX path cap"));
2056 if (cap & CIFS_UNIX_XATTR_CAP)
2057 cFYI(1, ("XATTR cap"));
2058 if (cap & CIFS_UNIX_POSIX_ACL_CAP)
2059 cFYI(1, ("POSIX ACL cap"));
2060 if (cap & CIFS_UNIX_LARGE_READ_CAP)
2061 cFYI(1, ("very large read cap"));
2062 if (cap & CIFS_UNIX_LARGE_WRITE_CAP)
2063 cFYI(1, ("very large write cap"));
2064 #endif /* CIFS_DEBUG2 */
2065 if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
2066 if (vol_info == NULL) {
2067 cFYI(1, ("resetting capabilities failed"));
2068 } else
2069 cERROR(1, ("Negotiating Unix capabilities "
2070 "with the server failed. Consider "
2071 "mounting with the Unix Extensions\n"
2072 "disabled, if problems are found, "
2073 "by specifying the nounix mount "
2074 "option."));
2075
2076 }
2077 }
2078 }
2079
2080 static void
2081 convert_delimiter(char *path, char delim)
2082 {
2083 int i;
2084 char old_delim;
2085
2086 if (path == NULL)
2087 return;
2088
2089 if (delim == '/')
2090 old_delim = '\\';
2091 else
2092 old_delim = '/';
2093
2094 for (i = 0; path[i] != '\0'; i++) {
2095 if (path[i] == old_delim)
2096 path[i] = delim;
2097 }
2098 }
2099
2100 static void setup_cifs_sb(struct smb_vol *pvolume_info,
2101 struct cifs_sb_info *cifs_sb)
2102 {
2103 if (pvolume_info->rsize > CIFSMaxBufSize) {
2104 cERROR(1, ("rsize %d too large, using MaxBufSize",
2105 pvolume_info->rsize));
2106 cifs_sb->rsize = CIFSMaxBufSize;
2107 } else if ((pvolume_info->rsize) &&
2108 (pvolume_info->rsize <= CIFSMaxBufSize))
2109 cifs_sb->rsize = pvolume_info->rsize;
2110 else /* default */
2111 cifs_sb->rsize = CIFSMaxBufSize;
2112
2113 if (pvolume_info->wsize > PAGEVEC_SIZE * PAGE_CACHE_SIZE) {
2114 cERROR(1, ("wsize %d too large, using 4096 instead",
2115 pvolume_info->wsize));
2116 cifs_sb->wsize = 4096;
2117 } else if (pvolume_info->wsize)
2118 cifs_sb->wsize = pvolume_info->wsize;
2119 else
2120 cifs_sb->wsize = min_t(const int,
2121 PAGEVEC_SIZE * PAGE_CACHE_SIZE,
2122 127*1024);
2123 /* old default of CIFSMaxBufSize was too small now
2124 that SMB Write2 can send multiple pages in kvec.
2125 RFC1001 does not describe what happens when frame
2126 bigger than 128K is sent so use that as max in
2127 conjunction with 52K kvec constraint on arch with 4K
2128 page size */
2129
2130 if (cifs_sb->rsize < 2048) {
2131 cifs_sb->rsize = 2048;
2132 /* Windows ME may prefer this */
2133 cFYI(1, ("readsize set to minimum: 2048"));
2134 }
2135 /* calculate prepath */
2136 cifs_sb->prepath = pvolume_info->prepath;
2137 if (cifs_sb->prepath) {
2138 cifs_sb->prepathlen = strlen(cifs_sb->prepath);
2139 /* we can not convert the / to \ in the path
2140 separators in the prefixpath yet because we do not
2141 know (until reset_cifs_unix_caps is called later)
2142 whether POSIX PATH CAP is available. We normalize
2143 the / to \ after reset_cifs_unix_caps is called */
2144 pvolume_info->prepath = NULL;
2145 } else
2146 cifs_sb->prepathlen = 0;
2147 cifs_sb->mnt_uid = pvolume_info->linux_uid;
2148 cifs_sb->mnt_gid = pvolume_info->linux_gid;
2149 cifs_sb->mnt_file_mode = pvolume_info->file_mode;
2150 cifs_sb->mnt_dir_mode = pvolume_info->dir_mode;
2151 cFYI(1, ("file mode: 0x%x dir mode: 0x%x",
2152 cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode));
2153
2154 if (pvolume_info->noperm)
2155 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
2156 if (pvolume_info->setuids)
2157 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
2158 if (pvolume_info->server_ino)
2159 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
2160 if (pvolume_info->remap)
2161 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
2162 if (pvolume_info->no_xattr)
2163 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
2164 if (pvolume_info->sfu_emul)
2165 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
2166 if (pvolume_info->nobrl)
2167 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
2168 if (pvolume_info->nostrictsync)
2169 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_SSYNC;
2170 if (pvolume_info->mand_lock)
2171 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL;
2172 if (pvolume_info->cifs_acl)
2173 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
2174 if (pvolume_info->override_uid)
2175 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID;
2176 if (pvolume_info->override_gid)
2177 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
2178 if (pvolume_info->dynperm)
2179 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM;
2180 if (pvolume_info->direct_io) {
2181 cFYI(1, ("mounting share using direct i/o"));
2182 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
2183 }
2184
2185 if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm))
2186 cERROR(1, ("mount option dynperm ignored if cifsacl "
2187 "mount option supported"));
2188 }
2189
2190 static int
2191 is_path_accessible(int xid, struct cifsTconInfo *tcon,
2192 struct cifs_sb_info *cifs_sb, const char *full_path)
2193 {
2194 int rc;
2195 __u64 inode_num;
2196 FILE_ALL_INFO *pfile_info;
2197
2198 rc = CIFSGetSrvInodeNumber(xid, tcon, full_path, &inode_num,
2199 cifs_sb->local_nls,
2200 cifs_sb->mnt_cifs_flags &
2201 CIFS_MOUNT_MAP_SPECIAL_CHR);
2202 if (rc != -EOPNOTSUPP)
2203 return rc;
2204
2205 pfile_info = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
2206 if (pfile_info == NULL)
2207 return -ENOMEM;
2208
2209 rc = CIFSSMBQPathInfo(xid, tcon, full_path, pfile_info,
2210 0 /* not legacy */, cifs_sb->local_nls,
2211 cifs_sb->mnt_cifs_flags &
2212 CIFS_MOUNT_MAP_SPECIAL_CHR);
2213 kfree(pfile_info);
2214 return rc;
2215 }
2216
2217 int
2218 cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
2219 char *mount_data, const char *devname)
2220 {
2221 int rc = 0;
2222 int xid;
2223 struct smb_vol *volume_info;
2224 struct cifsSesInfo *pSesInfo = NULL;
2225 struct cifsTconInfo *tcon = NULL;
2226 struct TCP_Server_Info *srvTcp = NULL;
2227 char *full_path;
2228
2229 xid = GetXid();
2230
2231 volume_info = kzalloc(sizeof(struct smb_vol), GFP_KERNEL);
2232 if (!volume_info) {
2233 rc = -ENOMEM;
2234 goto out;
2235 }
2236
2237 if (cifs_parse_mount_options(mount_data, devname, volume_info)) {
2238 rc = -EINVAL;
2239 goto out;
2240 }
2241
2242 if (volume_info->nullauth) {
2243 cFYI(1, ("null user"));
2244 volume_info->username = "";
2245 } else if (volume_info->username) {
2246 /* BB fixme parse for domain name here */
2247 cFYI(1, ("Username: %s", volume_info->username));
2248 } else {
2249 cifserror("No username specified");
2250 /* In userspace mount helper we can get user name from alternate
2251 locations such as env variables and files on disk */
2252 rc = -EINVAL;
2253 goto out;
2254 }
2255
2256
2257 /* this is needed for ASCII cp to Unicode converts */
2258 if (volume_info->iocharset == NULL) {
2259 cifs_sb->local_nls = load_nls_default();
2260 /* load_nls_default can not return null */
2261 } else {
2262 cifs_sb->local_nls = load_nls(volume_info->iocharset);
2263 if (cifs_sb->local_nls == NULL) {
2264 cERROR(1, ("CIFS mount error: iocharset %s not found",
2265 volume_info->iocharset));
2266 rc = -ELIBACC;
2267 goto out;
2268 }
2269 }
2270
2271 /* get a reference to a tcp session */
2272 srvTcp = cifs_get_tcp_session(volume_info);
2273 if (IS_ERR(srvTcp)) {
2274 rc = PTR_ERR(srvTcp);
2275 goto out;
2276 }
2277
2278 pSesInfo = cifs_find_smb_ses(srvTcp, volume_info->username);
2279 if (pSesInfo) {
2280 cFYI(1, ("Existing smb sess found (status=%d)",
2281 pSesInfo->status));
2282 /*
2283 * The existing SMB session already has a reference to srvTcp,
2284 * so we can put back the extra one we got before
2285 */
2286 cifs_put_tcp_session(srvTcp);
2287
2288 down(&pSesInfo->sesSem);
2289 if (pSesInfo->need_reconnect) {
2290 cFYI(1, ("Session needs reconnect"));
2291 rc = cifs_setup_session(xid, pSesInfo,
2292 cifs_sb->local_nls);
2293 }
2294 up(&pSesInfo->sesSem);
2295 } else if (!rc) {
2296 cFYI(1, ("Existing smb sess not found"));
2297 pSesInfo = sesInfoAlloc();
2298 if (pSesInfo == NULL) {
2299 rc = -ENOMEM;
2300 goto mount_fail_check;
2301 }
2302
2303 /* new SMB session uses our srvTcp ref */
2304 pSesInfo->server = srvTcp;
2305 if (srvTcp->addr.sockAddr6.sin6_family == AF_INET6)
2306 sprintf(pSesInfo->serverName, "%pI6",
2307 &srvTcp->addr.sockAddr6.sin6_addr);
2308 else
2309 sprintf(pSesInfo->serverName, "%pI4",
2310 &srvTcp->addr.sockAddr.sin_addr.s_addr);
2311
2312 write_lock(&cifs_tcp_ses_lock);
2313 list_add(&pSesInfo->smb_ses_list, &srvTcp->smb_ses_list);
2314 write_unlock(&cifs_tcp_ses_lock);
2315
2316 /* volume_info->password freed at unmount */
2317 if (volume_info->password) {
2318 pSesInfo->password = kstrdup(volume_info->password,
2319 GFP_KERNEL);
2320 if (!pSesInfo->password) {
2321 rc = -ENOMEM;
2322 goto mount_fail_check;
2323 }
2324 }
2325 if (volume_info->username)
2326 strncpy(pSesInfo->userName, volume_info->username,
2327 MAX_USERNAME_SIZE);
2328 if (volume_info->domainname) {
2329 int len = strlen(volume_info->domainname);
2330 pSesInfo->domainName = kmalloc(len + 1, GFP_KERNEL);
2331 if (pSesInfo->domainName)
2332 strcpy(pSesInfo->domainName,
2333 volume_info->domainname);
2334 }
2335 pSesInfo->linux_uid = volume_info->linux_uid;
2336 pSesInfo->overrideSecFlg = volume_info->secFlg;
2337 down(&pSesInfo->sesSem);
2338
2339 /* BB FIXME need to pass vol->secFlgs BB */
2340 rc = cifs_setup_session(xid, pSesInfo,
2341 cifs_sb->local_nls);
2342 up(&pSesInfo->sesSem);
2343 }
2344
2345 /* search for existing tcon to this server share */
2346 if (!rc) {
2347 setup_cifs_sb(volume_info, cifs_sb);
2348
2349 tcon = cifs_find_tcon(pSesInfo, volume_info->UNC);
2350 if (tcon) {
2351 cFYI(1, ("Found match on UNC path"));
2352 /* existing tcon already has a reference */
2353 cifs_put_smb_ses(pSesInfo);
2354 if (tcon->seal != volume_info->seal)
2355 cERROR(1, ("transport encryption setting "
2356 "conflicts with existing tid"));
2357 } else {
2358 tcon = tconInfoAlloc();
2359 if (tcon == NULL) {
2360 rc = -ENOMEM;
2361 goto mount_fail_check;
2362 }
2363
2364 tcon->ses = pSesInfo;
2365 if (volume_info->password) {
2366 tcon->password = kstrdup(volume_info->password,
2367 GFP_KERNEL);
2368 if (!tcon->password) {
2369 rc = -ENOMEM;
2370 goto mount_fail_check;
2371 }
2372 }
2373
2374 /* check for null share name ie connect to dfs root */
2375 if ((strchr(volume_info->UNC + 3, '\\') == NULL)
2376 && (strchr(volume_info->UNC + 3, '/') == NULL)) {
2377 /* rc = connect_to_dfs_path(...) */
2378 cFYI(1, ("DFS root not supported"));
2379 rc = -ENODEV;
2380 goto mount_fail_check;
2381 } else {
2382 /* BB Do we need to wrap sesSem around
2383 * this TCon call and Unix SetFS as
2384 * we do on SessSetup and reconnect? */
2385 rc = CIFSTCon(xid, pSesInfo, volume_info->UNC,
2386 tcon, cifs_sb->local_nls);
2387 cFYI(1, ("CIFS Tcon rc = %d", rc));
2388 if (volume_info->nodfs) {
2389 tcon->Flags &= ~SMB_SHARE_IS_IN_DFS;
2390 cFYI(1, ("DFS disabled (%d)",
2391 tcon->Flags));
2392 }
2393 }
2394 if (rc)
2395 goto mount_fail_check;
2396 tcon->seal = volume_info->seal;
2397 write_lock(&cifs_tcp_ses_lock);
2398 list_add(&tcon->tcon_list, &pSesInfo->tcon_list);
2399 write_unlock(&cifs_tcp_ses_lock);
2400 }
2401
2402 /* we can have only one retry value for a connection
2403 to a share so for resources mounted more than once
2404 to the same server share the last value passed in
2405 for the retry flag is used */
2406 tcon->retry = volume_info->retry;
2407 tcon->nocase = volume_info->nocase;
2408 tcon->local_lease = volume_info->local_lease;
2409 }
2410 if (pSesInfo) {
2411 if (pSesInfo->capabilities & CAP_LARGE_FILES) {
2412 sb->s_maxbytes = (u64) 1 << 63;
2413 } else
2414 sb->s_maxbytes = (u64) 1 << 31; /* 2 GB */
2415 }
2416
2417 /* BB FIXME fix time_gran to be larger for LANMAN sessions */
2418 sb->s_time_gran = 100;
2419
2420 mount_fail_check:
2421 /* on error free sesinfo and tcon struct if needed */
2422 if (rc) {
2423 /* If find_unc succeeded then rc == 0 so we can not end */
2424 /* up accidently freeing someone elses tcon struct */
2425 if (tcon)
2426 cifs_put_tcon(tcon);
2427 else if (pSesInfo)
2428 cifs_put_smb_ses(pSesInfo);
2429 else
2430 cifs_put_tcp_session(srvTcp);
2431 goto out;
2432 }
2433 cifs_sb->tcon = tcon;
2434
2435 /* do not care if following two calls succeed - informational */
2436 if (!tcon->ipc) {
2437 CIFSSMBQFSDeviceInfo(xid, tcon);
2438 CIFSSMBQFSAttributeInfo(xid, tcon);
2439 }
2440
2441 /* tell server which Unix caps we support */
2442 if (tcon->ses->capabilities & CAP_UNIX)
2443 /* reset of caps checks mount to see if unix extensions
2444 disabled for just this mount */
2445 reset_cifs_unix_caps(xid, tcon, sb, volume_info);
2446 else
2447 tcon->unix_ext = 0; /* server does not support them */
2448
2449 /* convert forward to back slashes in prepath here if needed */
2450 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) == 0)
2451 convert_delimiter(cifs_sb->prepath, CIFS_DIR_SEP(cifs_sb));
2452
2453 if ((tcon->unix_ext == 0) && (cifs_sb->rsize > (1024 * 127))) {
2454 cifs_sb->rsize = 1024 * 127;
2455 cFYI(DBG2, ("no very large read support, rsize now 127K"));
2456 }
2457 if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X))
2458 cifs_sb->wsize = min(cifs_sb->wsize,
2459 (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE));
2460 if (!(tcon->ses->capabilities & CAP_LARGE_READ_X))
2461 cifs_sb->rsize = min(cifs_sb->rsize,
2462 (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE));
2463
2464 if (!rc && cifs_sb->prepathlen) {
2465 /* build_path_to_root works only when we have a valid tcon */
2466 full_path = cifs_build_path_to_root(cifs_sb);
2467 if (full_path == NULL) {
2468 rc = -ENOMEM;
2469 goto mount_fail_check;
2470 }
2471 rc = is_path_accessible(xid, tcon, cifs_sb, full_path);
2472 if (rc) {
2473 cERROR(1, ("Path %s in not accessible: %d",
2474 full_path, rc));
2475 kfree(full_path);
2476 goto mount_fail_check;
2477 }
2478 kfree(full_path);
2479 }
2480
2481 /* volume_info->password is freed above when existing session found
2482 (in which case it is not needed anymore) but when new sesion is created
2483 the password ptr is put in the new session structure (in which case the
2484 password will be freed at unmount time) */
2485 out:
2486 /* zero out password before freeing */
2487 if (volume_info) {
2488 if (volume_info->password != NULL) {
2489 memset(volume_info->password, 0,
2490 strlen(volume_info->password));
2491 kfree(volume_info->password);
2492 }
2493 kfree(volume_info->UNC);
2494 kfree(volume_info->prepath);
2495 kfree(volume_info);
2496 }
2497 FreeXid(xid);
2498 return rc;
2499 }
2500
2501 static int
2502 CIFSSessSetup(unsigned int xid, struct cifsSesInfo *ses,
2503 char session_key[CIFS_SESS_KEY_SIZE],
2504 const struct nls_table *nls_codepage)
2505 {
2506 struct smb_hdr *smb_buffer;
2507 struct smb_hdr *smb_buffer_response;
2508 SESSION_SETUP_ANDX *pSMB;
2509 SESSION_SETUP_ANDX *pSMBr;
2510 char *bcc_ptr;
2511 char *user;
2512 char *domain;
2513 int rc = 0;
2514 int remaining_words = 0;
2515 int bytes_returned = 0;
2516 int len;
2517 __u32 capabilities;
2518 __u16 count;
2519
2520 cFYI(1, ("In sesssetup"));
2521 if (ses == NULL)
2522 return -EINVAL;
2523 user = ses->userName;
2524 domain = ses->domainName;
2525 smb_buffer = cifs_buf_get();
2526
2527 if (smb_buffer == NULL)
2528 return -ENOMEM;
2529
2530 smb_buffer_response = smb_buffer;
2531 pSMBr = pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2532
2533 /* send SMBsessionSetup here */
2534 header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2535 NULL /* no tCon exists yet */ , 13 /* wct */ );
2536
2537 smb_buffer->Mid = GetNextMid(ses->server);
2538 pSMB->req_no_secext.AndXCommand = 0xFF;
2539 pSMB->req_no_secext.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2540 pSMB->req_no_secext.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2541
2542 if (ses->server->secMode &
2543 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2544 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2545
2546 capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2547 CAP_LARGE_WRITE_X | CAP_LARGE_READ_X;
2548 if (ses->capabilities & CAP_UNICODE) {
2549 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2550 capabilities |= CAP_UNICODE;
2551 }
2552 if (ses->capabilities & CAP_STATUS32) {
2553 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2554 capabilities |= CAP_STATUS32;
2555 }
2556 if (ses->capabilities & CAP_DFS) {
2557 smb_buffer->Flags2 |= SMBFLG2_DFS;
2558 capabilities |= CAP_DFS;
2559 }
2560 pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
2561
2562 pSMB->req_no_secext.CaseInsensitivePasswordLength =
2563 cpu_to_le16(CIFS_SESS_KEY_SIZE);
2564
2565 pSMB->req_no_secext.CaseSensitivePasswordLength =
2566 cpu_to_le16(CIFS_SESS_KEY_SIZE);
2567 bcc_ptr = pByteArea(smb_buffer);
2568 memcpy(bcc_ptr, (char *) session_key, CIFS_SESS_KEY_SIZE);
2569 bcc_ptr += CIFS_SESS_KEY_SIZE;
2570 memcpy(bcc_ptr, (char *) session_key, CIFS_SESS_KEY_SIZE);
2571 bcc_ptr += CIFS_SESS_KEY_SIZE;
2572
2573 if (ses->capabilities & CAP_UNICODE) {
2574 if ((long) bcc_ptr % 2) { /* must be word aligned for Unicode */
2575 *bcc_ptr = 0;
2576 bcc_ptr++;
2577 }
2578 if (user == NULL)
2579 bytes_returned = 0; /* skip null user */
2580 else
2581 bytes_returned =
2582 cifs_strtoUCS((__le16 *) bcc_ptr, user, 100,
2583 nls_codepage);
2584 /* convert number of 16 bit words to bytes */
2585 bcc_ptr += 2 * bytes_returned;
2586 bcc_ptr += 2; /* trailing null */
2587 if (domain == NULL)
2588 bytes_returned =
2589 cifs_strtoUCS((__le16 *) bcc_ptr,
2590 "CIFS_LINUX_DOM", 32, nls_codepage);
2591 else
2592 bytes_returned =
2593 cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
2594 nls_codepage);
2595 bcc_ptr += 2 * bytes_returned;
2596 bcc_ptr += 2;
2597 bytes_returned =
2598 cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2599 32, nls_codepage);
2600 bcc_ptr += 2 * bytes_returned;
2601 bytes_returned =
2602 cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release,
2603 32, nls_codepage);
2604 bcc_ptr += 2 * bytes_returned;
2605 bcc_ptr += 2;
2606 bytes_returned =
2607 cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2608 64, nls_codepage);
2609 bcc_ptr += 2 * bytes_returned;
2610 bcc_ptr += 2;
2611 } else {
2612 if (user != NULL) {
2613 strncpy(bcc_ptr, user, 200);
2614 bcc_ptr += strnlen(user, 200);
2615 }
2616 *bcc_ptr = 0;
2617 bcc_ptr++;
2618 if (domain == NULL) {
2619 strcpy(bcc_ptr, "CIFS_LINUX_DOM");
2620 bcc_ptr += strlen("CIFS_LINUX_DOM") + 1;
2621 } else {
2622 strncpy(bcc_ptr, domain, 64);
2623 bcc_ptr += strnlen(domain, 64);
2624 *bcc_ptr = 0;
2625 bcc_ptr++;
2626 }
2627 strcpy(bcc_ptr, "Linux version ");
2628 bcc_ptr += strlen("Linux version ");
2629 strcpy(bcc_ptr, utsname()->release);
2630 bcc_ptr += strlen(utsname()->release) + 1;
2631 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2632 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2633 }
2634 count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2635 smb_buffer->smb_buf_length += count;
2636 pSMB->req_no_secext.ByteCount = cpu_to_le16(count);
2637
2638 rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
2639 &bytes_returned, CIFS_LONG_OP);
2640 if (rc) {
2641 /* rc = map_smb_to_linux_error(smb_buffer_response); now done in SendReceive */
2642 } else if ((smb_buffer_response->WordCount == 3)
2643 || (smb_buffer_response->WordCount == 4)) {
2644 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2645 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2646 if (action & GUEST_LOGIN)
2647 cFYI(1, ("Guest login")); /* BB mark SesInfo struct? */
2648 ses->Suid = smb_buffer_response->Uid; /* UID left in wire format
2649 (little endian) */
2650 cFYI(1, ("UID = %d ", ses->Suid));
2651 /* response can have either 3 or 4 word count - Samba sends 3 */
2652 bcc_ptr = pByteArea(smb_buffer_response);
2653 if ((pSMBr->resp.hdr.WordCount == 3)
2654 || ((pSMBr->resp.hdr.WordCount == 4)
2655 && (blob_len < pSMBr->resp.ByteCount))) {
2656 if (pSMBr->resp.hdr.WordCount == 4)
2657 bcc_ptr += blob_len;
2658
2659 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2660 if ((long) (bcc_ptr) % 2) {
2661 remaining_words =
2662 (BCC(smb_buffer_response) - 1) / 2;
2663 /* Unicode strings must be word
2664 aligned */
2665 bcc_ptr++;
2666 } else {
2667 remaining_words =
2668 BCC(smb_buffer_response) / 2;
2669 }
2670 len =
2671 UniStrnlen((wchar_t *) bcc_ptr,
2672 remaining_words - 1);
2673 /* We look for obvious messed up bcc or strings in response so we do not go off
2674 the end since (at least) WIN2K and Windows XP have a major bug in not null
2675 terminating last Unicode string in response */
2676 if (ses->serverOS)
2677 kfree(ses->serverOS);
2678 ses->serverOS = kzalloc(2 * (len + 1),
2679 GFP_KERNEL);
2680 if (ses->serverOS == NULL)
2681 goto sesssetup_nomem;
2682 cifs_strfromUCS_le(ses->serverOS,
2683 (__le16 *)bcc_ptr,
2684 len, nls_codepage);
2685 bcc_ptr += 2 * (len + 1);
2686 remaining_words -= len + 1;
2687 ses->serverOS[2 * len] = 0;
2688 ses->serverOS[1 + (2 * len)] = 0;
2689 if (remaining_words > 0) {
2690 len = UniStrnlen((wchar_t *)bcc_ptr,
2691 remaining_words-1);
2692 kfree(ses->serverNOS);
2693 ses->serverNOS = kzalloc(2 * (len + 1),
2694 GFP_KERNEL);
2695 if (ses->serverNOS == NULL)
2696 goto sesssetup_nomem;
2697 cifs_strfromUCS_le(ses->serverNOS,
2698 (__le16 *)bcc_ptr,
2699 len, nls_codepage);
2700 bcc_ptr += 2 * (len + 1);
2701 ses->serverNOS[2 * len] = 0;
2702 ses->serverNOS[1 + (2 * len)] = 0;
2703 if (strncmp(ses->serverNOS,
2704 "NT LAN Manager 4", 16) == 0) {
2705 cFYI(1, ("NT4 server"));
2706 ses->flags |= CIFS_SES_NT4;
2707 }
2708 remaining_words -= len + 1;
2709 if (remaining_words > 0) {
2710 len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
2711 /* last string is not always null terminated
2712 (for e.g. for Windows XP & 2000) */
2713 if (ses->serverDomain)
2714 kfree(ses->serverDomain);
2715 ses->serverDomain =
2716 kzalloc(2*(len+1),
2717 GFP_KERNEL);
2718 if (ses->serverDomain == NULL)
2719 goto sesssetup_nomem;
2720 cifs_strfromUCS_le(ses->serverDomain,
2721 (__le16 *)bcc_ptr,
2722 len, nls_codepage);
2723 bcc_ptr += 2 * (len + 1);
2724 ses->serverDomain[2*len] = 0;
2725 ses->serverDomain[1+(2*len)] = 0;
2726 } else { /* else no more room so create
2727 dummy domain string */
2728 if (ses->serverDomain)
2729 kfree(ses->serverDomain);
2730 ses->serverDomain =
2731 kzalloc(2, GFP_KERNEL);
2732 }
2733 } else { /* no room so create dummy domain
2734 and NOS string */
2735
2736 /* if these kcallocs fail not much we
2737 can do, but better to not fail the
2738 sesssetup itself */
2739 kfree(ses->serverDomain);
2740 ses->serverDomain =
2741 kzalloc(2, GFP_KERNEL);
2742 kfree(ses->serverNOS);
2743 ses->serverNOS =
2744 kzalloc(2, GFP_KERNEL);
2745 }
2746 } else { /* ASCII */
2747 len = strnlen(bcc_ptr, 1024);
2748 if (((long) bcc_ptr + len) - (long)
2749 pByteArea(smb_buffer_response)
2750 <= BCC(smb_buffer_response)) {
2751 kfree(ses->serverOS);
2752 ses->serverOS = kzalloc(len + 1,
2753 GFP_KERNEL);
2754 if (ses->serverOS == NULL)
2755 goto sesssetup_nomem;
2756 strncpy(ses->serverOS, bcc_ptr, len);
2757
2758 bcc_ptr += len;
2759 /* null terminate the string */
2760 bcc_ptr[0] = 0;
2761 bcc_ptr++;
2762
2763 len = strnlen(bcc_ptr, 1024);
2764 kfree(ses->serverNOS);
2765 ses->serverNOS = kzalloc(len + 1,
2766 GFP_KERNEL);
2767 if (ses->serverNOS == NULL)
2768 goto sesssetup_nomem;
2769 strncpy(ses->serverNOS, bcc_ptr, len);
2770 bcc_ptr += len;
2771 bcc_ptr[0] = 0;
2772 bcc_ptr++;
2773
2774 len = strnlen(bcc_ptr, 1024);
2775 if (ses->serverDomain)
2776 kfree(ses->serverDomain);
2777 ses->serverDomain = kzalloc(len + 1,
2778 GFP_KERNEL);
2779 if (ses->serverDomain == NULL)
2780 goto sesssetup_nomem;
2781 strncpy(ses->serverDomain, bcc_ptr,
2782 len);
2783 bcc_ptr += len;
2784 bcc_ptr[0] = 0;
2785 bcc_ptr++;
2786 } else
2787 cFYI(1,
2788 ("Variable field of length %d "
2789 "extends beyond end of smb ",
2790 len));
2791 }
2792 } else {
2793 cERROR(1, ("Security Blob Length extends beyond "
2794 "end of SMB"));
2795 }
2796 } else {
2797 cERROR(1, ("Invalid Word count %d: ",
2798 smb_buffer_response->WordCount));
2799 rc = -EIO;
2800 }
2801 sesssetup_nomem: /* do not return an error on nomem for the info strings,
2802 since that could make reconnection harder, and
2803 reconnection might be needed to free memory */
2804 cifs_buf_release(smb_buffer);
2805
2806 return rc;
2807 }
2808
2809 static int
2810 CIFSNTLMSSPNegotiateSessSetup(unsigned int xid,
2811 struct cifsSesInfo *ses, bool *pNTLMv2_flag,
2812 const struct nls_table *nls_codepage)
2813 {
2814 struct smb_hdr *smb_buffer;
2815 struct smb_hdr *smb_buffer_response;
2816 SESSION_SETUP_ANDX *pSMB;
2817 SESSION_SETUP_ANDX *pSMBr;
2818 char *bcc_ptr;
2819 char *domain;
2820 int rc = 0;
2821 int remaining_words = 0;
2822 int bytes_returned = 0;
2823 int len;
2824 int SecurityBlobLength = sizeof(NEGOTIATE_MESSAGE);
2825 PNEGOTIATE_MESSAGE SecurityBlob;
2826 PCHALLENGE_MESSAGE SecurityBlob2;
2827 __u32 negotiate_flags, capabilities;
2828 __u16 count;
2829
2830 cFYI(1, ("In NTLMSSP sesssetup (negotiate)"));
2831 if (ses == NULL)
2832 return -EINVAL;
2833 domain = ses->domainName;
2834 *pNTLMv2_flag = false;
2835 smb_buffer = cifs_buf_get();
2836 if (smb_buffer == NULL) {
2837 return -ENOMEM;
2838 }
2839 smb_buffer_response = smb_buffer;
2840 pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2841 pSMBr = (SESSION_SETUP_ANDX *) smb_buffer_response;
2842
2843 /* send SMBsessionSetup here */
2844 header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2845 NULL /* no tCon exists yet */ , 12 /* wct */ );
2846
2847 smb_buffer->Mid = GetNextMid(ses->server);
2848 pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
2849 pSMB->req.hdr.Flags |= (SMBFLG_CASELESS | SMBFLG_CANONICAL_PATH_FORMAT);
2850
2851 pSMB->req.AndXCommand = 0xFF;
2852 pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2853 pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2854
2855 if (ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2856 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2857
2858 capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2859 CAP_EXTENDED_SECURITY;
2860 if (ses->capabilities & CAP_UNICODE) {
2861 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2862 capabilities |= CAP_UNICODE;
2863 }
2864 if (ses->capabilities & CAP_STATUS32) {
2865 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2866 capabilities |= CAP_STATUS32;
2867 }
2868 if (ses->capabilities & CAP_DFS) {
2869 smb_buffer->Flags2 |= SMBFLG2_DFS;
2870 capabilities |= CAP_DFS;
2871 }
2872 pSMB->req.Capabilities = cpu_to_le32(capabilities);
2873
2874 bcc_ptr = (char *) &pSMB->req.SecurityBlob;
2875 SecurityBlob = (PNEGOTIATE_MESSAGE) bcc_ptr;
2876 strncpy(SecurityBlob->Signature, NTLMSSP_SIGNATURE, 8);
2877 SecurityBlob->MessageType = NtLmNegotiate;
2878 negotiate_flags =
2879 NTLMSSP_NEGOTIATE_UNICODE | NTLMSSP_NEGOTIATE_OEM |
2880 NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_NTLM |
2881 NTLMSSP_NEGOTIATE_56 |
2882 /* NTLMSSP_NEGOTIATE_ALWAYS_SIGN | */ NTLMSSP_NEGOTIATE_128;
2883 if (sign_CIFS_PDUs)
2884 negotiate_flags |= NTLMSSP_NEGOTIATE_SIGN;
2885 /* if (ntlmv2_support)
2886 negotiate_flags |= NTLMSSP_NEGOTIATE_NTLMV2;*/
2887 /* setup pointers to domain name and workstation name */
2888 bcc_ptr += SecurityBlobLength;
2889
2890 SecurityBlob->WorkstationName.Buffer = 0;
2891 SecurityBlob->WorkstationName.Length = 0;
2892 SecurityBlob->WorkstationName.MaximumLength = 0;
2893
2894 /* Domain not sent on first Sesssetup in NTLMSSP, instead it is sent
2895 along with username on auth request (ie the response to challenge) */
2896 SecurityBlob->DomainName.Buffer = 0;
2897 SecurityBlob->DomainName.Length = 0;
2898 SecurityBlob->DomainName.MaximumLength = 0;
2899 if (ses->capabilities & CAP_UNICODE) {
2900 if ((long) bcc_ptr % 2) {
2901 *bcc_ptr = 0;
2902 bcc_ptr++;
2903 }
2904
2905 bytes_returned =
2906 cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2907 32, nls_codepage);
2908 bcc_ptr += 2 * bytes_returned;
2909 bytes_returned =
2910 cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release, 32,
2911 nls_codepage);
2912 bcc_ptr += 2 * bytes_returned;
2913 bcc_ptr += 2; /* null terminate Linux version */
2914 bytes_returned =
2915 cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2916 64, nls_codepage);
2917 bcc_ptr += 2 * bytes_returned;
2918 *(bcc_ptr + 1) = 0;
2919 *(bcc_ptr + 2) = 0;
2920 bcc_ptr += 2; /* null terminate network opsys string */
2921 *(bcc_ptr + 1) = 0;
2922 *(bcc_ptr + 2) = 0;
2923 bcc_ptr += 2; /* null domain */
2924 } else { /* ASCII */
2925 strcpy(bcc_ptr, "Linux version ");
2926 bcc_ptr += strlen("Linux version ");
2927 strcpy(bcc_ptr, utsname()->release);
2928 bcc_ptr += strlen(utsname()->release) + 1;
2929 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2930 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2931 bcc_ptr++; /* empty domain field */
2932 *bcc_ptr = 0;
2933 }
2934 SecurityBlob->NegotiateFlags = cpu_to_le32(negotiate_flags);
2935 pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
2936 count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2937 smb_buffer->smb_buf_length += count;
2938 pSMB->req.ByteCount = cpu_to_le16(count);
2939
2940 rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
2941 &bytes_returned, CIFS_LONG_OP);
2942
2943 if (smb_buffer_response->Status.CifsError ==
2944 cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED))
2945 rc = 0;
2946
2947 if (rc) {
2948 /* rc = map_smb_to_linux_error(smb_buffer_response); *//* done in SendReceive now */
2949 } else if ((smb_buffer_response->WordCount == 3)
2950 || (smb_buffer_response->WordCount == 4)) {
2951 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2952 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2953
2954 if (action & GUEST_LOGIN)
2955 cFYI(1, ("Guest login"));
2956 /* Do we want to set anything in SesInfo struct when guest login? */
2957
2958 bcc_ptr = pByteArea(smb_buffer_response);
2959 /* response can have either 3 or 4 word count - Samba sends 3 */
2960
2961 SecurityBlob2 = (PCHALLENGE_MESSAGE) bcc_ptr;
2962 if (SecurityBlob2->MessageType != NtLmChallenge) {
2963 cFYI(1, ("Unexpected NTLMSSP message type received %d",
2964 SecurityBlob2->MessageType));
2965 } else if (ses) {
2966 ses->Suid = smb_buffer_response->Uid; /* UID left in le format */
2967 cFYI(1, ("UID = %d", ses->Suid));
2968 if ((pSMBr->resp.hdr.WordCount == 3)
2969 || ((pSMBr->resp.hdr.WordCount == 4)
2970 && (blob_len <
2971 pSMBr->resp.ByteCount))) {
2972
2973 if (pSMBr->resp.hdr.WordCount == 4) {
2974 bcc_ptr += blob_len;
2975 cFYI(1, ("Security Blob Length %d",
2976 blob_len));
2977 }
2978
2979 cFYI(1, ("NTLMSSP Challenge rcvd"));
2980
2981 memcpy(ses->server->cryptKey,
2982 SecurityBlob2->Challenge,
2983 CIFS_CRYPTO_KEY_SIZE);
2984 if (SecurityBlob2->NegotiateFlags &
2985 cpu_to_le32(NTLMSSP_NEGOTIATE_NTLMV2))
2986 *pNTLMv2_flag = true;
2987
2988 if ((SecurityBlob2->NegotiateFlags &
2989 cpu_to_le32(NTLMSSP_NEGOTIATE_ALWAYS_SIGN))
2990 || (sign_CIFS_PDUs > 1))
2991 ses->server->secMode |=
2992 SECMODE_SIGN_REQUIRED;
2993 if ((SecurityBlob2->NegotiateFlags &
2994 cpu_to_le32(NTLMSSP_NEGOTIATE_SIGN)) && (sign_CIFS_PDUs))
2995 ses->server->secMode |=
2996 SECMODE_SIGN_ENABLED;
2997
2998 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2999 if ((long) (bcc_ptr) % 2) {
3000 remaining_words =
3001 (BCC(smb_buffer_response)
3002 - 1) / 2;
3003 /* Must word align unicode strings */
3004 bcc_ptr++;
3005 } else {
3006 remaining_words =
3007 BCC
3008 (smb_buffer_response) / 2;
3009 }
3010 len =
3011 UniStrnlen((wchar_t *) bcc_ptr,
3012 remaining_words - 1);
3013 /* We look for obvious messed up bcc or strings in response so we do not go off
3014 the end since (at least) WIN2K and Windows XP have a major bug in not null
3015 terminating last Unicode string in response */
3016 if (ses->serverOS)
3017 kfree(ses->serverOS);
3018 ses->serverOS =
3019 kzalloc(2 * (len + 1), GFP_KERNEL);
3020 cifs_strfromUCS_le(ses->serverOS,
3021 (__le16 *)
3022 bcc_ptr, len,
3023 nls_codepage);
3024 bcc_ptr += 2 * (len + 1);
3025 remaining_words -= len + 1;
3026 ses->serverOS[2 * len] = 0;
3027 ses->serverOS[1 + (2 * len)] = 0;
3028 if (remaining_words > 0) {
3029 len = UniStrnlen((wchar_t *)
3030 bcc_ptr,
3031 remaining_words
3032 - 1);
3033 kfree(ses->serverNOS);
3034 ses->serverNOS =
3035 kzalloc(2 * (len + 1),
3036 GFP_KERNEL);
3037 cifs_strfromUCS_le(ses->
3038 serverNOS,
3039 (__le16 *)
3040 bcc_ptr,
3041 len,
3042 nls_codepage);
3043 bcc_ptr += 2 * (len + 1);
3044 ses->serverNOS[2 * len] = 0;
3045 ses->serverNOS[1 +
3046 (2 * len)] = 0;
3047 remaining_words -= len + 1;
3048 if (remaining_words > 0) {
3049 len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
3050 /* last string not always null terminated
3051 (for e.g. for Windows XP & 2000) */
3052 kfree(ses->serverDomain);
3053 ses->serverDomain =
3054 kzalloc(2 *
3055 (len +
3056 1),
3057 GFP_KERNEL);
3058 cifs_strfromUCS_le
3059 (ses->serverDomain,
3060 (__le16 *)bcc_ptr,
3061 len, nls_codepage);
3062 bcc_ptr +=
3063 2 * (len + 1);
3064 ses->serverDomain[2*len]
3065 = 0;
3066 ses->serverDomain
3067 [1 + (2 * len)]
3068 = 0;
3069 } /* else no more room so create dummy domain string */
3070 else {
3071 kfree(ses->serverDomain);
3072 ses->serverDomain =
3073 kzalloc(2,
3074 GFP_KERNEL);
3075 }
3076 } else { /* no room so create dummy domain and NOS string */
3077 kfree(ses->serverDomain);
3078 ses->serverDomain =
3079 kzalloc(2, GFP_KERNEL);
3080 kfree(ses->serverNOS);
3081 ses->serverNOS =
3082 kzalloc(2, GFP_KERNEL);
3083 }
3084 } else { /* ASCII */
3085 len = strnlen(bcc_ptr, 1024);
3086 if (((long) bcc_ptr + len) - (long)
3087 pByteArea(smb_buffer_response)
3088 <= BCC(smb_buffer_response)) {
3089 if (ses->serverOS)
3090 kfree(ses->serverOS);
3091 ses->serverOS =
3092 kzalloc(len + 1,
3093 GFP_KERNEL);
3094 strncpy(ses->serverOS,
3095 bcc_ptr, len);
3096
3097 bcc_ptr += len;
3098 bcc_ptr[0] = 0; /* null terminate string */
3099 bcc_ptr++;
3100
3101 len = strnlen(bcc_ptr, 1024);
3102 kfree(ses->serverNOS);
3103 ses->serverNOS =
3104 kzalloc(len + 1,
3105 GFP_KERNEL);
3106 strncpy(ses->serverNOS, bcc_ptr, len);
3107 bcc_ptr += len;
3108 bcc_ptr[0] = 0;
3109 bcc_ptr++;
3110
3111 len = strnlen(bcc_ptr, 1024);
3112 kfree(ses->serverDomain);
3113 ses->serverDomain =
3114 kzalloc(len + 1,
3115 GFP_KERNEL);
3116 strncpy(ses->serverDomain,
3117 bcc_ptr, len);
3118 bcc_ptr += len;
3119 bcc_ptr[0] = 0;
3120 bcc_ptr++;
3121 } else
3122 cFYI(1,
3123 ("field of length %d "
3124 "extends beyond end of smb",
3125 len));
3126 }
3127 } else {
3128 cERROR(1, ("Security Blob Length extends beyond"
3129 " end of SMB"));
3130 }
3131 } else {
3132 cERROR(1, ("No session structure passed in."));
3133 }
3134 } else {
3135 cERROR(1, ("Invalid Word count %d:",
3136 smb_buffer_response->WordCount));
3137 rc = -EIO;
3138 }
3139
3140 cifs_buf_release(smb_buffer);
3141
3142 return rc;
3143 }
3144 static int
3145 CIFSNTLMSSPAuthSessSetup(unsigned int xid, struct cifsSesInfo *ses,
3146 char *ntlm_session_key, bool ntlmv2_flag,
3147 const struct nls_table *nls_codepage)
3148 {
3149 struct smb_hdr *smb_buffer;
3150 struct smb_hdr *smb_buffer_response;
3151 SESSION_SETUP_ANDX *pSMB;
3152 SESSION_SETUP_ANDX *pSMBr;
3153 char *bcc_ptr;
3154 char *user;
3155 char *domain;
3156 int rc = 0;
3157 int remaining_words = 0;
3158 int bytes_returned = 0;
3159 int len;
3160 int SecurityBlobLength = sizeof(AUTHENTICATE_MESSAGE);
3161 PAUTHENTICATE_MESSAGE SecurityBlob;
3162 __u32 negotiate_flags, capabilities;
3163 __u16 count;
3164
3165 cFYI(1, ("In NTLMSSPSessSetup (Authenticate)"));
3166 if (ses == NULL)
3167 return -EINVAL;
3168 user = ses->userName;
3169 domain = ses->domainName;
3170 smb_buffer = cifs_buf_get();
3171 if (smb_buffer == NULL) {
3172 return -ENOMEM;
3173 }
3174 smb_buffer_response = smb_buffer;
3175 pSMB = (SESSION_SETUP_ANDX *)smb_buffer;
3176 pSMBr = (SESSION_SETUP_ANDX *)smb_buffer_response;
3177
3178 /* send SMBsessionSetup here */
3179 header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
3180 NULL /* no tCon exists yet */ , 12 /* wct */ );
3181
3182 smb_buffer->Mid = GetNextMid(ses->server);
3183 pSMB->req.hdr.Flags |= (SMBFLG_CASELESS | SMBFLG_CANONICAL_PATH_FORMAT);
3184 pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
3185 pSMB->req.AndXCommand = 0xFF;
3186 pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
3187 pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
3188
3189 pSMB->req.hdr.Uid = ses->Suid;
3190
3191 if (ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
3192 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
3193
3194 capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
3195 CAP_EXTENDED_SECURITY;
3196 if (ses->capabilities & CAP_UNICODE) {
3197 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
3198 capabilities |= CAP_UNICODE;
3199 }
3200 if (ses->capabilities & CAP_STATUS32) {
3201 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
3202 capabilities |= CAP_STATUS32;
3203 }
3204 if (ses->capabilities & CAP_DFS) {
3205 smb_buffer->Flags2 |= SMBFLG2_DFS;
3206 capabilities |= CAP_DFS;
3207 }
3208 pSMB->req.Capabilities = cpu_to_le32(capabilities);
3209
3210 bcc_ptr = (char *)&pSMB->req.SecurityBlob;
3211 SecurityBlob = (PAUTHENTICATE_MESSAGE)bcc_ptr;
3212 strncpy(SecurityBlob->Signature, NTLMSSP_SIGNATURE, 8);
3213 SecurityBlob->MessageType = NtLmAuthenticate;
3214 bcc_ptr += SecurityBlobLength;
3215 negotiate_flags = NTLMSSP_NEGOTIATE_UNICODE | NTLMSSP_REQUEST_TARGET |
3216 NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_TARGET_INFO |
3217 0x80000000 | NTLMSSP_NEGOTIATE_128;
3218 if (sign_CIFS_PDUs)
3219 negotiate_flags |= /* NTLMSSP_NEGOTIATE_ALWAYS_SIGN |*/ NTLMSSP_NEGOTIATE_SIGN;
3220 if (ntlmv2_flag)
3221 negotiate_flags |= NTLMSSP_NEGOTIATE_NTLMV2;
3222
3223 /* setup pointers to domain name and workstation name */
3224
3225 SecurityBlob->WorkstationName.Buffer = 0;
3226 SecurityBlob->WorkstationName.Length = 0;
3227 SecurityBlob->WorkstationName.MaximumLength = 0;
3228 SecurityBlob->SessionKey.Length = 0;
3229 SecurityBlob->SessionKey.MaximumLength = 0;
3230 SecurityBlob->SessionKey.Buffer = 0;
3231
3232 SecurityBlob->LmChallengeResponse.Length = 0;
3233 SecurityBlob->LmChallengeResponse.MaximumLength = 0;
3234 SecurityBlob->LmChallengeResponse.Buffer = 0;
3235
3236 SecurityBlob->NtChallengeResponse.Length =
3237 cpu_to_le16(CIFS_SESS_KEY_SIZE);
3238 SecurityBlob->NtChallengeResponse.MaximumLength =
3239 cpu_to_le16(CIFS_SESS_KEY_SIZE);
3240 memcpy(bcc_ptr, ntlm_session_key, CIFS_SESS_KEY_SIZE);
3241 SecurityBlob->NtChallengeResponse.Buffer =
3242 cpu_to_le32(SecurityBlobLength);
3243 SecurityBlobLength += CIFS_SESS_KEY_SIZE;
3244 bcc_ptr += CIFS_SESS_KEY_SIZE;
3245
3246 if (ses->capabilities & CAP_UNICODE) {
3247 if (domain == NULL) {
3248 SecurityBlob->DomainName.Buffer = 0;
3249 SecurityBlob->DomainName.Length = 0;
3250 SecurityBlob->DomainName.MaximumLength = 0;
3251 } else {
3252 __u16 ln = cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
3253 nls_codepage);
3254 ln *= 2;
3255 SecurityBlob->DomainName.MaximumLength =
3256 cpu_to_le16(ln);
3257 SecurityBlob->DomainName.Buffer =
3258 cpu_to_le32(SecurityBlobLength);
3259 bcc_ptr += ln;
3260 SecurityBlobLength += ln;
3261 SecurityBlob->DomainName.Length = cpu_to_le16(ln);
3262 }
3263 if (user == NULL) {
3264 SecurityBlob->UserName.Buffer = 0;
3265 SecurityBlob->UserName.Length = 0;
3266 SecurityBlob->UserName.MaximumLength = 0;
3267 } else {
3268 __u16 ln = cifs_strtoUCS((__le16 *) bcc_ptr, user, 64,
3269 nls_codepage);
3270 ln *= 2;
3271 SecurityBlob->UserName.MaximumLength =
3272 cpu_to_le16(ln);
3273 SecurityBlob->UserName.Buffer =
3274 cpu_to_le32(SecurityBlobLength);
3275 bcc_ptr += ln;
3276 SecurityBlobLength += ln;
3277 SecurityBlob->UserName.Length = cpu_to_le16(ln);
3278 }
3279
3280 /* SecurityBlob->WorkstationName.Length =
3281 cifs_strtoUCS((__le16 *) bcc_ptr, "AMACHINE",64, nls_codepage);
3282 SecurityBlob->WorkstationName.Length *= 2;
3283 SecurityBlob->WorkstationName.MaximumLength =
3284 cpu_to_le16(SecurityBlob->WorkstationName.Length);
3285 SecurityBlob->WorkstationName.Buffer =
3286 cpu_to_le32(SecurityBlobLength);
3287 bcc_ptr += SecurityBlob->WorkstationName.Length;
3288 SecurityBlobLength += SecurityBlob->WorkstationName.Length;
3289 SecurityBlob->WorkstationName.Length =
3290 cpu_to_le16(SecurityBlob->WorkstationName.Length); */
3291
3292 if ((long) bcc_ptr % 2) {
3293 *bcc_ptr = 0;
3294 bcc_ptr++;
3295 }
3296 bytes_returned =
3297 cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
3298 32, nls_codepage);
3299 bcc_ptr += 2 * bytes_returned;
3300 bytes_returned =
3301 cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release, 32,
3302 nls_codepage);
3303 bcc_ptr += 2 * bytes_returned;
3304 bcc_ptr += 2; /* null term version string */
3305 bytes_returned =
3306 cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
3307 64, nls_codepage);
3308 bcc_ptr += 2 * bytes_returned;
3309 *(bcc_ptr + 1) = 0;
3310 *(bcc_ptr + 2) = 0;
3311 bcc_ptr += 2; /* null terminate network opsys string */
3312 *(bcc_ptr + 1) = 0;
3313 *(bcc_ptr + 2) = 0;
3314 bcc_ptr += 2; /* null domain */
3315 } else { /* ASCII */
3316 if (domain == NULL) {
3317 SecurityBlob->DomainName.Buffer = 0;
3318 SecurityBlob->DomainName.Length = 0;
3319 SecurityBlob->DomainName.MaximumLength = 0;
3320 } else {
3321 __u16 ln;
3322 negotiate_flags |= NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED;
3323 strncpy(bcc_ptr, domain, 63);
3324 ln = strnlen(domain, 64);
3325 SecurityBlob->DomainName.MaximumLength =
3326 cpu_to_le16(ln);
3327 SecurityBlob->DomainName.Buffer =
3328 cpu_to_le32(SecurityBlobLength);
3329 bcc_ptr += ln;
3330 SecurityBlobLength += ln;
3331 SecurityBlob->DomainName.Length = cpu_to_le16(ln);
3332 }
3333 if (user == NULL) {
3334 SecurityBlob->UserName.Buffer = 0;
3335 SecurityBlob->UserName.Length = 0;
3336 SecurityBlob->UserName.MaximumLength = 0;
3337 } else {
3338 __u16 ln;
3339 strncpy(bcc_ptr, user, 63);
3340 ln = strnlen(user, 64);
3341 SecurityBlob->UserName.MaximumLength = cpu_to_le16(ln);
3342 SecurityBlob->UserName.Buffer =
3343 cpu_to_le32(SecurityBlobLength);
3344 bcc_ptr += ln;
3345 SecurityBlobLength += ln;
3346 SecurityBlob->UserName.Length = cpu_to_le16(ln);
3347 }
3348 /* BB fill in our workstation name if known BB */
3349
3350 strcpy(bcc_ptr, "Linux version ");
3351 bcc_ptr += strlen("Linux version ");
3352 strcpy(bcc_ptr, utsname()->release);
3353 bcc_ptr += strlen(utsname()->release) + 1;
3354 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
3355 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
3356 bcc_ptr++; /* null domain */
3357 *bcc_ptr = 0;
3358 }
3359 SecurityBlob->NegotiateFlags = cpu_to_le32(negotiate_flags);
3360 pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
3361 count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
3362 smb_buffer->smb_buf_length += count;
3363 pSMB->req.ByteCount = cpu_to_le16(count);
3364
3365 rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
3366 &bytes_returned, CIFS_LONG_OP);
3367 if (rc) {
3368 /* rc = map_smb_to_linux_error(smb_buffer_response) done in SendReceive now */
3369 } else if ((smb_buffer_response->WordCount == 3) ||
3370 (smb_buffer_response->WordCount == 4)) {
3371 __u16 action = le16_to_cpu(pSMBr->resp.Action);
3372 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
3373 if (action & GUEST_LOGIN)
3374 cFYI(1, ("Guest login")); /* BB Should we set anything
3375 in SesInfo struct ? */
3376 /* if (SecurityBlob2->MessageType != NtLm??) {
3377 cFYI("Unexpected message type on auth response is %d"));
3378 } */
3379
3380 if (ses) {
3381 cFYI(1,
3382 ("Check challenge UID %d vs auth response UID %d",
3383 ses->Suid, smb_buffer_response->Uid));
3384 /* UID left in wire format */
3385 ses->Suid = smb_buffer_response->Uid;
3386 bcc_ptr = pByteArea(smb_buffer_response);
3387 /* response can have either 3 or 4 word count - Samba sends 3 */
3388 if ((pSMBr->resp.hdr.WordCount == 3)
3389 || ((pSMBr->resp.hdr.WordCount == 4)
3390 && (blob_len <
3391 pSMBr->resp.ByteCount))) {
3392 if (pSMBr->resp.hdr.WordCount == 4) {
3393 bcc_ptr +=
3394 blob_len;
3395 cFYI(1,
3396 ("Security Blob Length %d ",
3397 blob_len));
3398 }
3399
3400 cFYI(1,
3401 ("NTLMSSP response to Authenticate "));
3402
3403 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
3404 if ((long) (bcc_ptr) % 2) {
3405 remaining_words =
3406 (BCC(smb_buffer_response)
3407 - 1) / 2;
3408 bcc_ptr++; /* Unicode strings must be word aligned */
3409 } else {
3410 remaining_words = BCC(smb_buffer_response) / 2;
3411 }
3412 len = UniStrnlen((wchar_t *) bcc_ptr,
3413 remaining_words - 1);
3414 /* We look for obvious messed up bcc or strings in response so we do not go off
3415 the end since (at least) WIN2K and Windows XP have a major bug in not null
3416 terminating last Unicode string in response */
3417 if (ses->serverOS)
3418 kfree(ses->serverOS);
3419 ses->serverOS =
3420 kzalloc(2 * (len + 1), GFP_KERNEL);
3421 cifs_strfromUCS_le(ses->serverOS,
3422 (__le16 *)
3423 bcc_ptr, len,
3424 nls_codepage);
3425 bcc_ptr += 2 * (len + 1);
3426 remaining_words -= len + 1;
3427 ses->serverOS[2 * len] = 0;
3428 ses->serverOS[1 + (2 * len)] = 0;
3429 if (remaining_words > 0) {
3430 len = UniStrnlen((wchar_t *)
3431 bcc_ptr,
3432 remaining_words
3433 - 1);
3434 kfree(ses->serverNOS);
3435 ses->serverNOS =
3436 kzalloc(2 * (len + 1),
3437 GFP_KERNEL);
3438 cifs_strfromUCS_le(ses->
3439 serverNOS,
3440 (__le16 *)
3441 bcc_ptr,
3442 len,
3443 nls_codepage);
3444 bcc_ptr += 2 * (len + 1);
3445 ses->serverNOS[2 * len] = 0;
3446 ses->serverNOS[1+(2*len)] = 0;
3447 remaining_words -= len + 1;
3448 if (remaining_words > 0) {
3449 len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
3450 /* last string not always null terminated (e.g. for Windows XP & 2000) */
3451 if (ses->serverDomain)
3452 kfree(ses->serverDomain);
3453 ses->serverDomain =
3454 kzalloc(2 *
3455 (len +
3456 1),
3457 GFP_KERNEL);
3458 cifs_strfromUCS_le
3459 (ses->
3460 serverDomain,
3461 (__le16 *)
3462 bcc_ptr, len,
3463 nls_codepage);
3464 bcc_ptr +=
3465 2 * (len + 1);
3466 ses->
3467 serverDomain[2
3468 * len]
3469 = 0;
3470 ses->
3471 serverDomain[1
3472 +
3473 (2
3474 *
3475 len)]
3476 = 0;
3477 } /* else no more room so create dummy domain string */
3478 else {
3479 if (ses->serverDomain)
3480 kfree(ses->serverDomain);
3481 ses->serverDomain = kzalloc(2,GFP_KERNEL);
3482 }
3483 } else { /* no room so create dummy domain and NOS string */
3484 if (ses->serverDomain)
3485 kfree(ses->serverDomain);
3486 ses->serverDomain = kzalloc(2, GFP_KERNEL);
3487 kfree(ses->serverNOS);
3488 ses->serverNOS = kzalloc(2, GFP_KERNEL);
3489 }
3490 } else { /* ASCII */
3491 len = strnlen(bcc_ptr, 1024);
3492 if (((long) bcc_ptr + len) -
3493 (long) pByteArea(smb_buffer_response)
3494 <= BCC(smb_buffer_response)) {
3495 if (ses->serverOS)
3496 kfree(ses->serverOS);
3497 ses->serverOS = kzalloc(len + 1, GFP_KERNEL);
3498 strncpy(ses->serverOS,bcc_ptr, len);
3499
3500 bcc_ptr += len;
3501 bcc_ptr[0] = 0; /* null terminate the string */
3502 bcc_ptr++;
3503
3504 len = strnlen(bcc_ptr, 1024);
3505 kfree(ses->serverNOS);
3506 ses->serverNOS = kzalloc(len+1,
3507 GFP_KERNEL);
3508 strncpy(ses->serverNOS,
3509 bcc_ptr, len);
3510 bcc_ptr += len;
3511 bcc_ptr[0] = 0;
3512 bcc_ptr++;
3513
3514 len = strnlen(bcc_ptr, 1024);
3515 if (ses->serverDomain)
3516 kfree(ses->serverDomain);
3517 ses->serverDomain =
3518 kzalloc(len+1,
3519 GFP_KERNEL);
3520 strncpy(ses->serverDomain,
3521 bcc_ptr, len);
3522 bcc_ptr += len;
3523 bcc_ptr[0] = 0;
3524 bcc_ptr++;
3525 } else
3526 cFYI(1, ("field of length %d "
3527 "extends beyond end of smb ",
3528 len));
3529 }
3530 } else {
3531 cERROR(1, ("Security Blob extends beyond end "
3532 "of SMB"));
3533 }
3534 } else {
3535 cERROR(1, ("No session structure passed in."));
3536 }
3537 } else {
3538 cERROR(1, ("Invalid Word count %d: ",
3539 smb_buffer_response->WordCount));
3540 rc = -EIO;
3541 }
3542
3543 cifs_buf_release(smb_buffer);
3544
3545 return rc;
3546 }
3547
3548 int
3549 CIFSTCon(unsigned int xid, struct cifsSesInfo *ses,
3550 const char *tree, struct cifsTconInfo *tcon,
3551 const struct nls_table *nls_codepage)
3552 {
3553 struct smb_hdr *smb_buffer;
3554 struct smb_hdr *smb_buffer_response;
3555 TCONX_REQ *pSMB;
3556 TCONX_RSP *pSMBr;
3557 unsigned char *bcc_ptr;
3558 int rc = 0;
3559 int length;
3560 __u16 count;
3561
3562 if (ses == NULL)
3563 return -EIO;
3564
3565 smb_buffer = cifs_buf_get();
3566 if (smb_buffer == NULL) {
3567 return -ENOMEM;
3568 }
3569 smb_buffer_response = smb_buffer;
3570
3571 header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX,
3572 NULL /*no tid */ , 4 /*wct */ );
3573
3574 smb_buffer->Mid = GetNextMid(ses->server);
3575 smb_buffer->Uid = ses->Suid;
3576 pSMB = (TCONX_REQ *) smb_buffer;
3577 pSMBr = (TCONX_RSP *) smb_buffer_response;
3578
3579 pSMB->AndXCommand = 0xFF;
3580 pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO);
3581 bcc_ptr = &pSMB->Password[0];
3582 if ((ses->server->secMode) & SECMODE_USER) {
3583 pSMB->PasswordLength = cpu_to_le16(1); /* minimum */
3584 *bcc_ptr = 0; /* password is null byte */
3585 bcc_ptr++; /* skip password */
3586 /* already aligned so no need to do it below */
3587 } else {
3588 pSMB->PasswordLength = cpu_to_le16(CIFS_SESS_KEY_SIZE);
3589 /* BB FIXME add code to fail this if NTLMv2 or Kerberos
3590 specified as required (when that support is added to
3591 the vfs in the future) as only NTLM or the much
3592 weaker LANMAN (which we do not send by default) is accepted
3593 by Samba (not sure whether other servers allow
3594 NTLMv2 password here) */
3595 #ifdef CONFIG_CIFS_WEAK_PW_HASH
3596 if ((extended_security & CIFSSEC_MAY_LANMAN) &&
3597 (ses->server->secType == LANMAN))
3598 calc_lanman_hash(tcon->password, ses->server->cryptKey,
3599 ses->server->secMode &
3600 SECMODE_PW_ENCRYPT ? true : false,
3601 bcc_ptr);
3602 else
3603 #endif /* CIFS_WEAK_PW_HASH */
3604 SMBNTencrypt(tcon->password, ses->server->cryptKey,
3605 bcc_ptr);
3606
3607 bcc_ptr += CIFS_SESS_KEY_SIZE;
3608 if (ses->capabilities & CAP_UNICODE) {
3609 /* must align unicode strings */
3610 *bcc_ptr = 0; /* null byte password */
3611 bcc_ptr++;
3612 }
3613 }
3614
3615 if (ses->server->secMode &
3616 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
3617 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
3618
3619 if (ses->capabilities & CAP_STATUS32) {
3620 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
3621 }
3622 if (ses->capabilities & CAP_DFS) {
3623 smb_buffer->Flags2 |= SMBFLG2_DFS;
3624 }
3625 if (ses->capabilities & CAP_UNICODE) {
3626 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
3627 length =
3628 cifs_strtoUCS((__le16 *) bcc_ptr, tree,
3629 6 /* max utf8 char length in bytes */ *
3630 (/* server len*/ + 256 /* share len */), nls_codepage);
3631 bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */
3632 bcc_ptr += 2; /* skip trailing null */
3633 } else { /* ASCII */
3634 strcpy(bcc_ptr, tree);
3635 bcc_ptr += strlen(tree) + 1;
3636 }
3637 strcpy(bcc_ptr, "?????");
3638 bcc_ptr += strlen("?????");
3639 bcc_ptr += 1;
3640 count = bcc_ptr - &pSMB->Password[0];
3641 pSMB->hdr.smb_buf_length += count;
3642 pSMB->ByteCount = cpu_to_le16(count);
3643
3644 rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length,
3645 CIFS_STD_OP);
3646
3647 /* if (rc) rc = map_smb_to_linux_error(smb_buffer_response); */
3648 /* above now done in SendReceive */
3649 if ((rc == 0) && (tcon != NULL)) {
3650 tcon->tidStatus = CifsGood;
3651 tcon->need_reconnect = false;
3652 tcon->tid = smb_buffer_response->Tid;
3653 bcc_ptr = pByteArea(smb_buffer_response);
3654 length = strnlen(bcc_ptr, BCC(smb_buffer_response) - 2);
3655 /* skip service field (NB: this field is always ASCII) */
3656 if (length == 3) {
3657 if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') &&
3658 (bcc_ptr[2] == 'C')) {
3659 cFYI(1, ("IPC connection"));
3660 tcon->ipc = 1;
3661 }
3662 } else if (length == 2) {
3663 if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) {
3664 /* the most common case */
3665 cFYI(1, ("disk share connection"));
3666 }
3667 }
3668 bcc_ptr += length + 1;
3669 strncpy(tcon->treeName, tree, MAX_TREE_SIZE);
3670 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
3671 length = UniStrnlen((wchar_t *) bcc_ptr, 512);
3672 if ((bcc_ptr + (2 * length)) -
3673 pByteArea(smb_buffer_response) <=
3674 BCC(smb_buffer_response)) {
3675 kfree(tcon->nativeFileSystem);
3676 tcon->nativeFileSystem =
3677 kzalloc(length + 2, GFP_KERNEL);
3678 if (tcon->nativeFileSystem)
3679 cifs_strfromUCS_le(
3680 tcon->nativeFileSystem,
3681 (__le16 *) bcc_ptr,
3682 length, nls_codepage);
3683 bcc_ptr += 2 * length;
3684 bcc_ptr[0] = 0; /* null terminate the string */
3685 bcc_ptr[1] = 0;
3686 bcc_ptr += 2;
3687 }
3688 /* else do not bother copying these information fields*/
3689 } else {
3690 length = strnlen(bcc_ptr, 1024);
3691 if ((bcc_ptr + length) -
3692 pByteArea(smb_buffer_response) <=
3693 BCC(smb_buffer_response)) {
3694 kfree(tcon->nativeFileSystem);
3695 tcon->nativeFileSystem =
3696 kzalloc(length + 1, GFP_KERNEL);
3697 if (tcon->nativeFileSystem)
3698 strncpy(tcon->nativeFileSystem, bcc_ptr,
3699 length);
3700 }
3701 /* else do not bother copying these information fields*/
3702 }
3703 if ((smb_buffer_response->WordCount == 3) ||
3704 (smb_buffer_response->WordCount == 7))
3705 /* field is in same location */
3706 tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport);
3707 else
3708 tcon->Flags = 0;
3709 cFYI(1, ("Tcon flags: 0x%x ", tcon->Flags));
3710 } else if ((rc == 0) && tcon == NULL) {
3711 /* all we need to save for IPC$ connection */
3712 ses->ipc_tid = smb_buffer_response->Tid;
3713 }
3714
3715 cifs_buf_release(smb_buffer);
3716 return rc;
3717 }
3718
3719 int
3720 cifs_umount(struct super_block *sb, struct cifs_sb_info *cifs_sb)
3721 {
3722 int rc = 0;
3723 char *tmp;
3724
3725 if (cifs_sb->tcon)
3726 cifs_put_tcon(cifs_sb->tcon);
3727
3728 cifs_sb->tcon = NULL;
3729 tmp = cifs_sb->prepath;
3730 cifs_sb->prepathlen = 0;
3731 cifs_sb->prepath = NULL;
3732 kfree(tmp);
3733
3734 return rc;
3735 }
3736
3737 int cifs_setup_session(unsigned int xid, struct cifsSesInfo *pSesInfo,
3738 struct nls_table *nls_info)
3739 {
3740 int rc = 0;
3741 char ntlm_session_key[CIFS_SESS_KEY_SIZE];
3742 bool ntlmv2_flag = false;
3743 int first_time = 0;
3744 struct TCP_Server_Info *server = pSesInfo->server;
3745
3746 /* what if server changes its buffer size after dropping the session? */
3747 if (server->maxBuf == 0) /* no need to send on reconnect */ {
3748 rc = CIFSSMBNegotiate(xid, pSesInfo);
3749 if (rc == -EAGAIN) {
3750 /* retry only once on 1st time connection */
3751 rc = CIFSSMBNegotiate(xid, pSesInfo);
3752 if (rc == -EAGAIN)
3753 rc = -EHOSTDOWN;
3754 }
3755 if (rc == 0) {
3756 spin_lock(&GlobalMid_Lock);
3757 if (server->tcpStatus != CifsExiting)
3758 server->tcpStatus = CifsGood;
3759 else
3760 rc = -EHOSTDOWN;
3761 spin_unlock(&GlobalMid_Lock);
3762
3763 }
3764 first_time = 1;
3765 }
3766
3767 if (rc)
3768 goto ss_err_exit;
3769
3770 pSesInfo->flags = 0;
3771 pSesInfo->capabilities = server->capabilities;
3772 if (linuxExtEnabled == 0)
3773 pSesInfo->capabilities &= (~CAP_UNIX);
3774 /* pSesInfo->sequence_number = 0;*/
3775 cFYI(1, ("Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d",
3776 server->secMode, server->capabilities, server->timeAdj));
3777
3778 if (experimEnabled < 2)
3779 rc = CIFS_SessSetup(xid, pSesInfo, first_time, nls_info);
3780 else if (extended_security
3781 && (pSesInfo->capabilities & CAP_EXTENDED_SECURITY)
3782 && (server->secType == NTLMSSP)) {
3783 rc = -EOPNOTSUPP;
3784 } else if (extended_security
3785 && (pSesInfo->capabilities & CAP_EXTENDED_SECURITY)
3786 && (server->secType == RawNTLMSSP)) {
3787 cFYI(1, ("NTLMSSP sesssetup"));
3788 rc = CIFSNTLMSSPNegotiateSessSetup(xid, pSesInfo, &ntlmv2_flag,
3789 nls_info);
3790 if (!rc) {
3791 if (ntlmv2_flag) {
3792 char *v2_response;
3793 cFYI(1, ("more secure NTLM ver2 hash"));
3794 if (CalcNTLMv2_partial_mac_key(pSesInfo,
3795 nls_info)) {
3796 rc = -ENOMEM;
3797 goto ss_err_exit;
3798 } else
3799 v2_response = kmalloc(16 + 64 /* blob*/,
3800 GFP_KERNEL);
3801 if (v2_response) {
3802 CalcNTLMv2_response(pSesInfo,
3803 v2_response);
3804 /* if (first_time)
3805 cifs_calculate_ntlmv2_mac_key */
3806 kfree(v2_response);
3807 /* BB Put dummy sig in SessSetup PDU? */
3808 } else {
3809 rc = -ENOMEM;
3810 goto ss_err_exit;
3811 }
3812
3813 } else {
3814 SMBNTencrypt(pSesInfo->password,
3815 server->cryptKey,
3816 ntlm_session_key);
3817
3818 if (first_time)
3819 cifs_calculate_mac_key(
3820 &server->mac_signing_key,
3821 ntlm_session_key,
3822 pSesInfo->password);
3823 }
3824 /* for better security the weaker lanman hash not sent
3825 in AuthSessSetup so we no longer calculate it */
3826
3827 rc = CIFSNTLMSSPAuthSessSetup(xid, pSesInfo,
3828 ntlm_session_key,
3829 ntlmv2_flag,
3830 nls_info);
3831 }
3832 } else { /* old style NTLM 0.12 session setup */
3833 SMBNTencrypt(pSesInfo->password, server->cryptKey,
3834 ntlm_session_key);
3835
3836 if (first_time)
3837 cifs_calculate_mac_key(&server->mac_signing_key,
3838 ntlm_session_key,
3839 pSesInfo->password);
3840
3841 rc = CIFSSessSetup(xid, pSesInfo, ntlm_session_key, nls_info);
3842 }
3843 if (rc) {
3844 cERROR(1, ("Send error in SessSetup = %d", rc));
3845 } else {
3846 cFYI(1, ("CIFS Session Established successfully"));
3847 spin_lock(&GlobalMid_Lock);
3848 pSesInfo->status = CifsGood;
3849 pSesInfo->need_reconnect = false;
3850 spin_unlock(&GlobalMid_Lock);
3851 }
3852
3853 ss_err_exit:
3854 return rc;
3855 }
3856
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